diff --git a/README.md b/README.md index 270a7569a..6f3e07ae3 100755 --- a/README.md +++ b/README.md @@ -55,6 +55,9 @@ docker run -p 1935:1935 -p 1985:1985 -p 8080:8080 \ * Usage: How to delivery HTTP-FLV?([CN][v3_CN_SampleHttpFlv], [EN][v3_EN_SampleHttpFlv]) * Usage: How to delivery HTTP-FLV Cluster?([CN][v3_CN_SampleHttpFlvCluster], [EN][v3_EN_SampleHttpFlvCluster]) * Usage: How to delivery HLS?([CN][v3_CN_SampleHLS], [EN][v3_EN_SampleHLS]) +* Usage: How to publish GB28181 to SRS? [#1500](https://github.com/ossrs/srs/issues/1500#issuecomment-606695679) +* Usage: How to play WebRTC from SRS? [#307](https://github.com/ossrs/srs/issues/307#issuecomment-602193458) +* Usage: How to publish SRT(Experimental) to SRS?([CN][v4_CN_SampleSRT], [EN][v4_EN_SampleSRT]) * Usage: How to transcode to h.264+aac for HLS?([CN][v3_CN_SampleTranscode2HLS], [EN][v3_EN_SampleTranscode2HLS]) * Usage: How to transode stream by FFMPEG?([CN][v2_CN_SampleFFMPEG], [EN][v2_EN_SampleFFMPEG]) * Usage: How to forward stream to other servers?([CN][v3_CN_SampleForward], [EN][v3_EN_SampleForward]) @@ -62,7 +65,6 @@ docker run -p 1935:1935 -p 1985:1985 -p 8080:8080 \ * Usage: How to ingest file/stream/device to SRS?([CN][v1_CN_SampleIngest], [EN][v1_EN_SampleIngest]) * Usage: How to delivery HLS by SRS HTTP server?([CN][v3_CN_SampleHTTP], [EN][v3_EN_SampleHTTP]) * Usage: How to delivery DASH(Experimental)?([CN][v3_CN_SampleDASH], [EN][v3_EN_SampleDASH]) -* Usage: How to transmux SRT(Experimental) to live streaming?([CN][v4_CN_SampleSRT], [EN][v4_EN_SampleSRT]) * Usage: How to publish h.264 raw stream as RTMP? ([CN][v3_CN_SrsLibrtmp2], [EN][v3_EN_SrsLibrtmp2]) * Usage: How to enable multiple processes? ([CN][v3_CN_REUSEPORT], [EN][v3_EN_REUSEPORT]) * Usage: Why SRS? What's the milestones? ([CN][v1_CN_Product], [EN][v1_EN_Product]) diff --git a/trunk/3rdparty/st-srs/README.md b/trunk/3rdparty/st-srs/README.md index 522d3c761..b05a6d86c 100644 --- a/trunk/3rdparty/st-srs/README.md +++ b/trunk/3rdparty/st-srs/README.md @@ -31,6 +31,14 @@ The branch [srs](https://github.com/ossrs/state-threads/tree/srs) will be patche * API reference: http://ossrs.github.io/state-threads/docs/reference.html * Programming notes: http://ossrs.github.io/state-threads/docs/notes.html +## Analysis + +* About setjmp and longjmp, read [setjmp](https://gitee.com/winlinvip/srs-wiki/raw/master/images/st-setjmp.jpg). +* About the stack structure, read [stack](https://gitee.com/winlinvip/srs-wiki/raw/master/images/st-stack.jpg) +* About asm code comments, read [#91d530e](https://github.com/ossrs/state-threads/commit/91d530e#diff-ed9428b14ff6afda0e9ab04cc91d4445R25). +* About the scheduler, read [#13-scheduler](https://github.com/ossrs/state-threads/issues/13#issuecomment-616025527). +* About the IO event system, read [#13-IO](https://github.com/ossrs/state-threads/issues/13#issuecomment-616096568). + ## Usage Get code: @@ -87,10 +95,4 @@ Important cli options: 1. `--track-origins= [default: no]`, Controls whether Memcheck tracks the origin of uninitialised values. By default, it does not, which means that although it can tell you that an uninitialised value is being used in a dangerous way, it cannot tell you where the uninitialised value came from. This often makes it difficult to track down the root problem. 1. `--show-reachable= , --show-possibly-lost=`, to show the using memory. -## Analysis - -1. About setjmp and longjmp, read [setjmp](https://gitee.com/winlinvip/srs-wiki/raw/master/images/st-setjmp.jpg). -1. About the stack structure, read [stack](https://gitee.com/winlinvip/srs-wiki/raw/master/images/st-stack.jpg) -1. About asm code comments, read [#91d530e](https://github.com/ossrs/state-threads/commit/91d530e#diff-ed9428b14ff6afda0e9ab04cc91d4445R25). - Winlin 2016 diff --git a/trunk/auto/depends.sh b/trunk/auto/depends.sh index 557de4bb3..1103377d2 100755 --- a/trunk/auto/depends.sh +++ b/trunk/auto/depends.sh @@ -103,7 +103,10 @@ function Ubuntu_prepare() fi pkg-config --version >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then - echo "Please install pkg-config"; exit -1; + echo "Installing pkg-config." + require_sudoer "sudo apt-get install -y --force-yes pkg-config" + sudo apt-get install -y --force-yes pkg-config; ret=$?; if [[ 0 -ne $ret ]]; then return $ret; fi + echo "The pkg-config is installed." fi echo "Tools for Ubuntu are installed." @@ -435,6 +438,10 @@ fi # cherrypy for http hooks callback, CherryPy-3.2.4 ##################################################################################### if [ $SRS_EXPORT_LIBRTMP_PROJECT = NO ]; then + # Detect python or python2 + python --version >/dev/null 2>&1 && SYS_PYTHON=python; + python2 --version >/dev/null 2>&1 && SYS_PYTHON=python2; + # Install cherrypy for api server. if [[ -f ${SRS_OBJS}/${SRS_PLATFORM}/CherryPy-3.2.4/setup.py ]]; then echo "CherryPy-3.2.4 is ok."; else @@ -442,7 +449,7 @@ if [ $SRS_EXPORT_LIBRTMP_PROJECT = NO ]; then ( rm -rf ${SRS_OBJS}/CherryPy-3.2.4 && cd ${SRS_OBJS}/${SRS_PLATFORM} && unzip -q ../../3rdparty/CherryPy-3.2.4.zip && cd CherryPy-3.2.4 && - python setup.py install --user --prefix='' + $SYS_PYTHON setup.py install --user --prefix='' ) fi # check status @@ -540,10 +547,10 @@ fi if [ $SRS_EXPORT_LIBRTMP_PROJECT = NO ]; then # For openssl-1.1.*, we should disable SRTP ASM, because SRTP only works with openssl-1.0.* if [[ $SRS_SRTP_ASM == YES ]]; then - echo "#include " > ${SRS_OBJS}/_tmp_srtp_asm_detect.c - echo "#if OPENSSL_VERSION_NUMBER >= 0x10100000L // v1.1.x" >> ${SRS_OBJS}/_tmp_srtp_asm_detect.c - echo "#error \"SRTP only works with openssl-1.0.*\"" >> ${SRS_OBJS}/_tmp_srtp_asm_detect.c - echo "#endif" >> ${SRS_OBJS}/_tmp_srtp_asm_detect.c + echo " #include " > ${SRS_OBJS}/_tmp_srtp_asm_detect.c + echo " #if OPENSSL_VERSION_NUMBER >= 0x10100000L // v1.1.x " >> ${SRS_OBJS}/_tmp_srtp_asm_detect.c + echo " #error \"SRTP only works with openssl-1.0.*\" " >> ${SRS_OBJS}/_tmp_srtp_asm_detect.c + echo " #endif " >> ${SRS_OBJS}/_tmp_srtp_asm_detect.c ${SRS_TOOL_CC} -c ${SRS_OBJS}/_tmp_srtp_asm_detect.c -I${SRS_OBJS}/openssl/include -o /dev/null >/dev/null 2>&1 if [[ $? -ne 0 ]]; then SRS_SRTP_ASM=NO && echo "Warning: Disable SRTP ASM optimization, please update docker"; diff --git a/trunk/auto/options.sh b/trunk/auto/options.sh index f2b0cb7e6..745b45e29 100755 --- a/trunk/auto/options.sh +++ b/trunk/auto/options.sh @@ -570,12 +570,12 @@ function apply_user_detail_options() { # Detect whether has sendmmsg. # @see http://man7.org/linux/man-pages/man2/sendmmsg.2.html mkdir -p ${SRS_OBJS} && - echo "#include " > ${SRS_OBJS}/_tmp_sendmmsg_detect.c - echo "int main(int argc, char** argv) {" >> ${SRS_OBJS}/_tmp_sendmmsg_detect.c - echo " struct mmsghdr hdr;" >> ${SRS_OBJS}/_tmp_sendmmsg_detect.c - echo " hdr.msg_len = 0;" >> ${SRS_OBJS}/_tmp_sendmmsg_detect.c - echo " return 0;" >> ${SRS_OBJS}/_tmp_sendmmsg_detect.c - echo "}" >> ${SRS_OBJS}/_tmp_sendmmsg_detect.c + echo " #include " > ${SRS_OBJS}/_tmp_sendmmsg_detect.c + echo " int main(int argc, char** argv) { " >> ${SRS_OBJS}/_tmp_sendmmsg_detect.c + echo " struct mmsghdr hdr; " >> ${SRS_OBJS}/_tmp_sendmmsg_detect.c + echo " hdr.msg_len = 0; " >> ${SRS_OBJS}/_tmp_sendmmsg_detect.c + echo " return 0; " >> ${SRS_OBJS}/_tmp_sendmmsg_detect.c + echo " } " >> ${SRS_OBJS}/_tmp_sendmmsg_detect.c ${SRS_TOOL_CC} -c ${SRS_OBJS}/_tmp_sendmmsg_detect.c -D_GNU_SOURCE -o /dev/null >/dev/null 2>&1 ret=$?; rm -f ${SRS_OBJS}/_tmp_sendmmsg_detect.c; if [[ $ret -ne 0 ]]; then @@ -656,10 +656,6 @@ function check_option_conflicts() { echo "Don't support building NGINX, please use docker https://github.com/ossrs/srs-docker"; exit -1; fi - if [[ $SRS_FFMPEG_TOOL == YES ]]; then - echo "Don't support building FFMPEG, please use docker https://github.com/ossrs/srs-docker"; exit -1; - fi - # For OSX, recommend to use DTrace, https://blog.csdn.net/win_lin/article/details/53503869 if [[ $SRS_OSX == YES && $SRS_GPROF == YES ]]; then echo "Tool gprof for OSX is unavailable, please use dtrace, read https://blog.csdn.net/win_lin/article/details/53503869" diff --git a/trunk/conf/full.conf b/trunk/conf/full.conf index 2c1089665..bb852f43e 100644 --- a/trunk/conf/full.conf +++ b/trunk/conf/full.conf @@ -370,6 +370,9 @@ stream_caster { # Whether bundle media stream port. # default: on invite_port_fixed on; + # interval to query equipment list from equipment or subordinate domain, unit(s) + # default: 60 + query_catalog_interval 60; } } diff --git a/trunk/conf/push.gb28181.conf b/trunk/conf/push.gb28181.conf index 0b49b8e77..27b7996ef 100644 --- a/trunk/conf/push.gb28181.conf +++ b/trunk/conf/push.gb28181.conf @@ -90,16 +90,18 @@ stream_caster { # 认为设备离线 keepalive_timeout 120; - # 注册之后是否自动给设备端发送invite # on: 是 off 不是，需要通过api控制 auto_play on; - # 设备将流发送的端口，是否固定 # on 发送流到多路复用端口 如9000 # off 自动从rtp_mix_port - rtp_max_port 之间的值中 # 选一个可以用的端口 invite_port_fixed on; + + # 向设备或下级域查询设备列表的间隔，单位(秒) + # 默认60秒 + query_catalog_interval 60; } } vhost __defaultVhost__ { diff --git a/trunk/research/msg_zerocopy/.gitignore b/trunk/research/msg_zerocopy/.gitignore new file mode 100644 index 000000000..3ddc9a018 --- /dev/null +++ b/trunk/research/msg_zerocopy/.gitignore @@ -0,0 +1,2 @@ +server +client \ No newline at end of file diff --git a/trunk/research/msg_zerocopy/Makefile b/trunk/research/msg_zerocopy/Makefile new file mode 100644 index 000000000..9cadc3e96 --- /dev/null +++ b/trunk/research/msg_zerocopy/Makefile @@ -0,0 +1,16 @@ + +.PHONY: default clean + +default: server client + +server: server.cpp ../../objs/st/libst.a + g++ -g -O0 -I../../objs/st/ $^ -o $@ + +client: client.cpp ../../objs/st/libst.a + g++ -g -O0 -I../../objs/st/ $^ -o $@ + +../../objs/st/libst.a: ../../Makefile + (cd ../../ && $(MAKE) st) + +clean: + rm -f server client ../../objs/st/libst.a diff --git a/trunk/research/msg_zerocopy/client.cpp b/trunk/research/msg_zerocopy/client.cpp new file mode 100644 index 000000000..92f30f604 --- /dev/null +++ b/trunk/research/msg_zerocopy/client.cpp @@ -0,0 +1,315 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +// @see https://www.kernel.org/doc/html/latest/networking/msg_zerocopy.html#notification-reception +#include + +// @see https://github.com/torvalds/linux/blob/master/tools/testing/selftests/net/msg_zerocopy.c +#include +#ifndef SO_EE_ORIGIN_ZEROCOPY +#define SO_EE_ORIGIN_ZEROCOPY 5 +#endif + +#ifndef SO_ZEROCOPY +#define SO_ZEROCOPY 60 +#endif + +#ifndef SO_EE_CODE_ZEROCOPY_COPIED +#define SO_EE_CODE_ZEROCOPY_COPIED 1 +#endif + +#ifndef MSG_ZEROCOPY +#define MSG_ZEROCOPY 0x4000000 +#endif + +#include +// Define macro for UDP GSO. +// @see https://github.com/torvalds/linux/blob/master/tools/testing/selftests/net/udpgso.c +#ifndef UDP_SEGMENT +#define UDP_SEGMENT 103 +#endif + +void* receiver(void* arg) +{ + st_netfd_t stfd = (st_netfd_t)arg; + + for (;;) { + sockaddr_in peer; + memset(&peer, 0, sizeof(sockaddr_in)); + + char buf[1500]; + memset(buf, 0, sizeof(buf)); + + iovec iov; + iov.iov_base = buf; + iov.iov_len = sizeof(buf); + + msghdr msg; + memset(&msg, 0, sizeof(msghdr)); + msg.msg_name = (sockaddr_in*)&peer; + msg.msg_namelen = sizeof(sockaddr_in); + msg.msg_iov = &iov; + msg.msg_iovlen = 1; + + int r0 = st_recvmsg(stfd, &msg, 0, ST_UTIME_NO_TIMEOUT); + assert(r0 > 0); + printf("Pong %s:%d %d bytes, flags %#x, %s\n", inet_ntoa(peer.sin_addr), ntohs(peer.sin_port), r0, + msg.msg_flags, msg.msg_iov->iov_base); + } + + return NULL; +} + +void parse_reception(st_netfd_t stfd, int nn_confirm) +{ + int left = nn_confirm; + while (left > 0) { + msghdr msg; + memset(&msg, 0, sizeof(msghdr)); + + // Reception from kernel, @see https://www.kernel.org/doc/html/latest/networking/msg_zerocopy.html#notification-reception + // See do_recv_completion at https://github.com/torvalds/linux/blob/master/tools/testing/selftests/net/msg_zerocopy.c#L393 + char control[100]; + msg.msg_control = control; + msg.msg_controllen = sizeof(control); + // Note that the r0 is 0, the reception is in the control. + int r0 = st_recvmsg(stfd, &msg, MSG_ERRQUEUE, ST_UTIME_NO_TIMEOUT); + assert(r0 >= 0); + assert(msg.msg_flags == MSG_ERRQUEUE); + + // Notification parsing, @see https://www.kernel.org/doc/html/latest/networking/msg_zerocopy.html#notification-parsing + cmsghdr* cm = CMSG_FIRSTHDR(&msg); + assert(cm->cmsg_level == SOL_IP || cm->cmsg_type == IP_RECVERR); + + sock_extended_err* serr = (sock_extended_err*)(void*)CMSG_DATA(cm); + assert(serr->ee_errno == 0 && serr->ee_origin == SO_EE_ORIGIN_ZEROCOPY); + + uint32_t hi = serr->ee_data; + uint32_t lo = serr->ee_info; + uint32_t range = hi - lo + 1; + left -= range; + printf("Reception %d bytes, flags %#x, cmsg(level %#x, type %#x), serr(errno %#x, origin %#x, code %#x), range %d [%d, %d]\n", + msg.msg_controllen, msg.msg_flags, cm->cmsg_level, cm->cmsg_type, serr->ee_errno, serr->ee_origin, serr->ee_code, range, lo, hi); + + // Defered Copies, @see https://www.kernel.org/doc/html/latest/networking/msg_zerocopy.html#deferred-copies + if (serr->ee_code == SO_EE_CODE_ZEROCOPY_COPIED) { + printf("Warning: Defered copies, should stop zerocopy\n"); + } + } +} + +void usage(int argc, char** argv) +{ + printf("Usage: %s \n", argv[0]); + printf("Options:\n"); + printf(" --help Print this help and exit.\n"); + printf(" --host=string The host to send to.\n"); + printf(" --port=int The port to send to.\n"); + printf(" --pong=bool Whether response pong, true|false\n"); + printf(" --zerocopy=bool Whether use zerocopy to sendmsg, true|false\n"); + printf(" --copy=int The copies of message, 1 means sendmmsg(msg+msg)\n"); + printf(" --loop=int The number of loop to send out messages\n"); + printf(" --batch=bool Whether read reception by batch, true|false\n"); + printf(" --mix=bool Whether mix msg with zerocopy and those without, true|false\n"); + printf(" --size=int Each message size in bytes.\n"); + printf(" --gso=int The GSO size in bytes, 0 to disable it.\n"); + printf(" --iovs=int The number of iovs to send, at least 1.\n"); + printf(" --sndbuf=int The SO_SNDBUF size in bytes, 0 to ignore.\n"); + printf("For example:\n"); + printf(" %s --host=127.0.0.1 --port=8000 --pong=true --zerocopy=true --copy=0 --loop=1 --batch=true --mix=true --size=1400 --gso=0 --iovs=1 --sndbuf=0\n", argv[0]); +} + +int main(int argc, char** argv) +{ + option longopts[] = { + { "host", required_argument, NULL, 'o' }, + { "port", required_argument, NULL, 'p' }, + { "pong", required_argument, NULL, 'n' }, + { "zerocopy", required_argument, NULL, 'z' }, + { "copy", required_argument, NULL, 'c' }, + { "loop", required_argument, NULL, 'l' }, + { "batch", required_argument, NULL, 'b' }, + { "mix", required_argument, NULL, 'm' }, + { "size", required_argument, NULL, 's' }, + { "gso", required_argument, NULL, 'g' }, + { "iovs", required_argument, NULL, 'i' }, + { "sndbuf", required_argument, NULL, 'u' }, + { "help", no_argument, NULL, 'h' }, + { NULL, 0, NULL, 0 } + }; + + char* host = NULL; char ch; + int port = 0; int nn_copies = 0; int loop = 1; int size = 1500; int gso = 0; int nn_iovs = 0; int sndbuf = 0; + bool pong = false; bool zerocopy = false; bool batch = false; bool mix = false; + while ((ch = getopt_long(argc, argv, "o:p:n:z:c:l:b:m:s:g:u:h", longopts, NULL)) != -1) { + switch (ch) { + case 'o': host = (char*)optarg; break; + case 'p': port = atoi(optarg); break; + case 'n': pong = !strcmp(optarg,"true"); break; + case 'z': zerocopy = !strcmp(optarg,"true"); break; + case 'c': nn_copies = atoi(optarg); break; + case 'l': loop = atoi(optarg); break; + case 'b': batch = !strcmp(optarg,"true"); break; + case 'm': mix = !strcmp(optarg,"true"); break; + case 's': size = atoi(optarg); break; + case 'g': gso = atoi(optarg); break; + case 'i': nn_iovs = atoi(optarg); break; + case 'u': sndbuf = atoi(optarg); break; + case 'h': usage(argc, argv); exit(0); + default: usage(argc, argv); exit(-1); + } + } + + printf("Server listen %s:%d, pong %d, zerocopy %d, copies %d, loop %d, batch %d, mix %d, size %d, gso %d, iovs %d, sndbuf %d\n", + host, port, pong, zerocopy, nn_copies, loop, batch, mix, size, gso, nn_iovs, sndbuf); + if (!host || !port || !nn_iovs) { + usage(argc, argv); + exit(-1); + } + + assert(!st_set_eventsys(ST_EVENTSYS_ALT)); + assert(!st_init()); + + int fd = socket(PF_INET, SOCK_DGRAM, 0); + assert(fd > 0); + + // @see https://github.com/torvalds/linux/blob/master/tools/testing/selftests/net/msg_zerocopy.c + if (zerocopy) { + int one = 1; + int r0 = setsockopt(fd, SOL_SOCKET, SO_ZEROCOPY, &one, sizeof(one)); +// MSG_ZEROCOPY for UDP was added in commit b5947e5d1e71 ("udp: msg_zerocopy") in Linux 5.0. +// @see https://lore.kernel.org/netdev/CA+FuTSfBFqRViKfG5crEv8xLMgAkp3cZ+yeuELK5TVv61xT=Yw@mail.gmail.com/ +#if LINUX_VERSION_CODE < KERNEL_VERSION(5,0,0) + if (r0 == -1) { + printf("MSG_ZEROCOPY should be kernel 5.0+, kernel %#x, errno=%d\n", LINUX_VERSION_CODE, 524); + exit(-1); + } +#endif + assert(!r0); + + printf("epoll events EPOLLERR=%#x, EPOLLHUP=%#x\n", EPOLLERR, EPOLLHUP); + } + + if (true) { + int dv = 0; + socklen_t len = sizeof(dv); + int r0 = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &dv, &len); + + int r1 = 0; + if (sndbuf > 0) { + r1 = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &sndbuf, sizeof(sndbuf)); + } + + int nv = 0; + int r2 = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &nv, &len); + printf("socket SO_SNDBUF default=%d, user=%d, now=%d, r0=%d, r1=%d, r2=%d\n", dv, sndbuf, nv, r0, r1, r2); + } + + st_netfd_t stfd = st_netfd_open_socket(fd); + assert(stfd); + printf("Client fd=%d\n", fd); + + if (pong) { + st_thread_t r0 = st_thread_create(receiver, stfd, 0, 0); + assert(r0); + } + + sockaddr_in peer; + memset(&peer, 0, sizeof(sockaddr_in)); + + peer.sin_family = AF_INET; + peer.sin_port = htons(port); + peer.sin_addr.s_addr = inet_addr(host); + + char* buf = new char[size]; + memset(buf, 0, size); + memcpy(buf, "Hello", size < 5? size : 5); + + iovec iov; + iov.iov_base = buf; + iov.iov_len = size; + + int nn_confirm = 0; + for (int k = 0; k < loop; k++) { + msghdr msg; + memset(&msg, 0, sizeof(msghdr)); + msg.msg_name = (sockaddr_in*)&peer; + msg.msg_namelen = sizeof(sockaddr_in); + msg.msg_iov = new iovec[nn_iovs]; + msg.msg_iovlen = nn_iovs; + + for (int i = 0; i < nn_iovs; i++) { + iovec* p = msg.msg_iov + i; + memcpy(p, &iov, sizeof(iovec)); + } + + if (gso > 0) { + msg.msg_controllen = CMSG_SPACE(sizeof(uint16_t)); + if (!msg.msg_control) { + msg.msg_control = new char[msg.msg_controllen]; + } + + cmsghdr* cm = CMSG_FIRSTHDR(&msg); + cm->cmsg_level = SOL_UDP; + cm->cmsg_type = UDP_SEGMENT; + cm->cmsg_len = CMSG_LEN(sizeof(uint16_t)); + *((uint16_t*)CMSG_DATA(cm)) = gso; + } + + int r0; + if (nn_copies == 0) { + if (zerocopy) { + r0 = st_sendmsg(stfd, &msg, MSG_ZEROCOPY, ST_UTIME_NO_TIMEOUT); + } else { + r0 = st_sendmsg(stfd, &msg, 0, ST_UTIME_NO_TIMEOUT); + } + } else { + mmsghdr* hdrs = new mmsghdr[nn_copies + 1]; + for (int i = 0; i < nn_copies + 1; i++) { + mmsghdr* p = hdrs + i; + memcpy(&p->msg_hdr, &msg, sizeof(msghdr)); + p->msg_len = 0; + } + if (zerocopy) { + r0 = st_sendmmsg(stfd, hdrs, nn_copies + 1, MSG_ZEROCOPY, ST_UTIME_NO_TIMEOUT); + } else { + r0 = st_sendmmsg(stfd, hdrs, nn_copies + 1, 0, ST_UTIME_NO_TIMEOUT); + } + } + if (r0 > 0) { + printf("Ping %s:%d %d bytes, control %d, copies=%d, r0=%d, %s\n", host, port, iov.iov_len * nn_iovs, + msg.msg_controllen, nn_copies, r0, msg.msg_iov->iov_base); + } else { + printf("Ping %d bytes, error r0=%d, errno=%d\n", iov.iov_len * nn_iovs, r0, errno); exit(1); + } + + if (zerocopy && !batch) { + parse_reception(stfd, r0); + } else { + nn_confirm += r0; + } + + if (mix) { + r0 = st_sendmsg(stfd, &msg, 0, ST_UTIME_NO_TIMEOUT); + assert(r0 > 0); + printf("Mix %s:%d %d bytes, r0=%d, %s\n", host, port, iov.iov_len * nn_iovs, r0, msg.msg_iov->iov_base); + } + } + + // @see https://www.kernel.org/doc/html/latest/networking/msg_zerocopy.html#notification-batching + if (batch) { + parse_reception(stfd, nn_confirm); + } + + st_sleep(-1); + return 0; +} diff --git a/trunk/research/msg_zerocopy/server.cpp b/trunk/research/msg_zerocopy/server.cpp new file mode 100644 index 000000000..1b9a5d059 --- /dev/null +++ b/trunk/research/msg_zerocopy/server.cpp @@ -0,0 +1,155 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct message { + st_netfd_t stfd; + sockaddr_in peer; + int delay; +}; + +void* sender(void* arg) +{ + message* p = (message*)arg; + + int delay = p->delay; + if (delay > 0) { + st_usleep(delay * 1000); + } + + msghdr msg; + memset(&msg, 0, sizeof(msghdr)); + + sockaddr_in peer = p->peer; + msg.msg_name = (sockaddr_in*)&peer; + msg.msg_namelen = sizeof(sockaddr_in); + + char buf[] = "World"; + + iovec iov; + memset(&iov, 0, sizeof(iovec)); + iov.iov_base = buf; + iov.iov_len = sizeof(buf); + msg.msg_iov = &iov; + msg.msg_iovlen = 1; + + st_netfd_t stfd = p->stfd; + int r0 = st_sendmsg(stfd, &msg, 0, ST_UTIME_NO_TIMEOUT); + assert(r0 > 0); + printf("Pong %s:%d %d bytes, flags %#x, %s\n", inet_ntoa(peer.sin_addr), ntohs(peer.sin_port), r0, + msg.msg_flags, msg.msg_iov->iov_base); + + return NULL; +} + +void usage(int argc, char** argv) +{ + printf("Usage: %s \n", argv[0]); + printf("Options:\n"); + printf(" --help Print this help and exit.\n"); + printf(" --host=string The host to send to.\n"); + printf(" --port=int The port to send to.\n"); + printf(" --pong=bool Whether response pong, true|false\n"); + printf(" --delay=int The delay in ms to response pong.\n"); + printf("For example:\n"); + printf(" %s --host=0.0.0.0 --port=8000 --pong --delay=100\n", argv[0]); +} + +int main(int argc, char** argv) +{ + option longopts[] = { + { "host", required_argument, NULL, 'o' }, + { "port", required_argument, NULL, 'p' }, + { "pong", required_argument, NULL, 'n' }, + { "delay", required_argument, NULL, 'd' }, + { "help", no_argument, NULL, 'h' }, + { NULL, 0, NULL, 0 } + }; + + char* host = NULL; char ch; + int port = 0; int delay = 0; bool pong = false; + while ((ch = getopt_long(argc, argv, "o:p:n:d:h", longopts, NULL)) != -1) { + switch (ch) { + case 'o': host = (char*)optarg; break; + case 'p': port = atoi(optarg); break; + case 'n': pong = !strcmp(optarg,"true"); break; + case 'd': delay = atoi(optarg); break; + case 'h': usage(argc, argv); exit(0); + default: usage(argc, argv); exit(-1); + } + } + + printf("Server listen %s:%d, pong %d, delay: %dms\n", host, port, pong, delay); + if (!host || !port) { + usage(argc, argv); + exit(-1); + } + + assert(!st_set_eventsys(ST_EVENTSYS_ALT)); + assert(!st_init()); + + int fd = socket(PF_INET, SOCK_DGRAM, 0); + assert(fd > 0); + + int n = 1; + int r0 = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&n, sizeof(n)); + assert(!r0); + + sockaddr_in addr; + memset(&addr, 0, sizeof(sockaddr_in)); + + addr.sin_family = AF_INET; + addr.sin_port = htons(port); + addr.sin_addr.s_addr = inet_addr(host); + + r0 = bind(fd, (sockaddr *)&addr, sizeof(sockaddr_in)); + assert(!r0); + + st_netfd_t stfd = st_netfd_open_socket(fd); + assert(stfd); + + printf("Listen at udp://%s:%d, fd=%d\n", host, port, fd); + + msghdr msg; + memset(&msg, 0, sizeof(msghdr)); + + sockaddr_in peer; + memset(&peer, 0, sizeof(sockaddr_in)); + msg.msg_name = (sockaddr_in*)&peer; + msg.msg_namelen = sizeof(sockaddr_in); + + char buf[1500]; + memset(buf, 0, sizeof(buf)); + + iovec iov; + memset(&iov, 0, sizeof(iovec)); + iov.iov_base = buf; + iov.iov_len = sizeof(buf); + msg.msg_iov = &iov; + msg.msg_iovlen = 1; + + int nn_msgs = 0; + while (true) { + r0 = st_recvmsg(stfd, &msg, 0, ST_UTIME_NO_TIMEOUT); + assert(r0 > 0); + printf("#%d, From %s:%d %d bytes, flags %#x, %s\n", nn_msgs++, inet_ntoa(peer.sin_addr), ntohs(peer.sin_port), + r0, msg.msg_flags, msg.msg_iov->iov_base); + + if (pong) { + message* msg = new message(); + msg->stfd = stfd; + msg->peer = peer; + msg->delay = delay; + st_thread_t r0 = st_thread_create(sender, msg, 0, 0); + assert(r0); + } + } + + return 0; +} diff --git a/trunk/research/players/rtc_player.html b/trunk/research/players/rtc_player.html index e1eb61eeb..e531aa434 100644 --- a/trunk/research/players/rtc_player.html +++ b/trunk/research/players/rtc_player.html @@ -24,12 +24,14 @@ diff --git a/trunk/research/players/srs_bwt.html b/trunk/research/players/srs_bwt.html index 53d893c7e..408516d9c 100644 --- a/trunk/research/players/srs_bwt.html +++ b/trunk/research/players/srs_bwt.html @@ -30,6 +30,7 @@
  • VLC播放器
    • +
  • SRS-GB28181
    • diff --git a/trunk/research/players/srs_chat.html b/trunk/research/players/srs_chat.html index 220f6f19f..6591c1492 100644 --- a/trunk/research/players/srs_chat.html +++ b/trunk/research/players/srs_chat.html @@ -29,6 +29,7 @@
  • VLC播放器
    • +
  • SRS-GB28181
    • diff --git a/trunk/research/players/srs_gb28181.html b/trunk/research/players/srs_gb28181.html new file mode 100644 index 000000000..702cf8473 --- /dev/null +++ b/trunk/research/players/srs_gb28181.html @@ -0,0 +1,1244 @@ + + + + SRS + + + + + + +
    +
    +
    + SRS +
    + +
    +
    +
    +
    +
    +
    +
    + +

    Usage:

     +

    + 请点击下面的图标，启用Flash +

    +

    + 若没有见到这个图标，Chrome浏览器请打开 + chrome://settings/content/flash 并修改为"Ask first"。 +

    +
    +
    +
    +
    + +
    + API地址与端口 + +

    + +
    + +
    +
    +
    + sip会话(需内部启用sip) +
    +
      +
      + + +
      +
      + + + + + +
      + 当前会话: +
      + 
      
+                  
      
+               
      
+            
      
+        
      
+      
      
+      
      
+
+      
      
+        
      
+            
      
+                GB28181媒体通道
+                
      
+                 
        
+                
        
+              
+            
        
+            
        
+                
+                
+                
+                
        
+                  当前通道:
+                  
        
+                    
+                    
+                     
+                  
        
+                  
        
+                    
+                    
+                    
        RTC播放，需要后台启用RTC功能才能正常播放， 
+                        RTC配置参考
+                    
        
+                  
        
+                  
        
+                    
        
+                  
        
+               
        
+            
        
+        
        
+      
        
+
+      
        
+        
+
+        
+
+        
+
+        
+    
        
+
+    
+
        
+
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/trunk/research/players/srs_player.html b/trunk/research/players/srs_player.html
index eb50aacc9..84b78b5c8 100755
--- a/trunk/research/players/srs_player.html
+++ b/trunk/research/players/srs_player.html
@@ -34,12 +34,14 @@
                 
             
         
diff --git a/trunk/research/players/srs_publisher.html b/trunk/research/players/srs_publisher.html
index a649b51bd..e07467b17 100644
--- a/trunk/research/players/srs_publisher.html
+++ b/trunk/research/players/srs_publisher.html
@@ -29,6 +29,7 @@
                     
                     
                     
      • VLC播放器
        • 
+                    
      • SRS-GB28181
        • 
                 
             
         
diff --git a/trunk/research/players/srs_publisher2.html b/trunk/research/players/srs_publisher2.html
index 04836a2af..bf75f3983 100644
--- a/trunk/research/players/srs_publisher2.html
+++ b/trunk/research/players/srs_publisher2.html
@@ -25,6 +25,7 @@
                     
                     
                     
      • VLC播放器
        • 
+                    
      • SRS-GB28181
        • 
                 
             
         
diff --git a/trunk/research/players/vlc.html b/trunk/research/players/vlc.html
index 66591f4be..8dbf5e47c 100644
--- a/trunk/research/players/vlc.html
+++ b/trunk/research/players/vlc.html
@@ -26,6 +26,7 @@
                     
                     
                     
      • VLC播放器
        • 
+                    
      • SRS-GB28181
        • 
                 
             
         
diff --git a/trunk/research/st/Makefile b/trunk/research/st/Makefile
deleted file mode 100755
index 0b24bb80c..000000000
--- a/trunk/research/st/Makefile
+++ /dev/null
@@ -1,100 +0,0 @@
-# The contents of this file are subject to the Mozilla Public
-# License Version 1.1 (the "License"); you may not use this file
-# except in compliance with the License. You may obtain a copy of
-# the License at http://www.mozilla.org/MPL/
-# 
-# Software distributed under the License is distributed on an "AS
-# IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
-# implied. See the License for the specific language governing
-# rights and limitations under the License.
-# 
-# The Original Code is the Netscape Portable Runtime library.
-# 
-# The Initial Developer of the Original Code is Netscape
-# Communications Corporation.  Portions created by Netscape are 
-# Copyright (C) 1994-2000 Netscape Communications Corporation.  All
-# Rights Reserved.
-# 
-# Contributor(s):  Silicon Graphics, Inc.
-# 
-# Portions created by SGI are Copyright (C) 2000-2001 Silicon
-# Graphics, Inc.  All Rights Reserved.
-# 
-# Alternatively, the contents of this file may be used under the
-# terms of the GNU General Public License Version 2 or later (the
-# "GPL"), in which case the provisions of the GPL are applicable 
-# instead of those above.  If you wish to allow use of your 
-# version of this file only under the terms of the GPL and not to
-# allow others to use your version of this file under the MPL,
-# indicate your decision by deleting the provisions above and
-# replace them with the notice and other provisions required by
-# the GPL.  If you do not delete the provisions above, a recipient
-# may use your version of this file under either the MPL or the
-# GPL.
-
-##########################
-# Target dir and cc:
-CC          = cc
-TARGETDIR   = objs
-
-##########################
-# Supported OSes:
-OS         = LINUX
-
-ifneq ($(shell test -f /usr/include/sys/epoll.h && echo yes), yes)
-default:
-	@echo "epoll not found"
-	@exit 1
-endif
-
-EXTRA_OBJS  = $(TARGETDIR)/md.o
-
-CFLAGS      =
-OTHER_FLAGS += -Wall -g -O0
-DEFINES     = -D$(OS) -DDEBUG -DMD_HAVE_EPOLL -DMALLOC_STACK
-
-##########################
-# Other possible defines:
-# To use malloc(3) instead of mmap(2) for stack allocation:
-# DEFINES += -DMALLOC_STACK
-#
-# To provision more than the default 16 thread-specific-data keys
-# (but not too many!):
-# DEFINES += -DST_KEYS_MAX=
-#
-# Note that you can also add these defines by specifying them as
-# make/gmake arguments (without editing this Makefile). For example:
-#
-# make EXTRA_CFLAGS=-UMD_HAVE_EPOLL 
-#
-##########################
-
-CFLAGS      += $(DEFINES) $(OTHER_FLAGS) $(EXTRA_CFLAGS)
-
-OBJS        = $(TARGETDIR)/sched.o 	\
-              $(TARGETDIR)/stk.o   	\
-              $(TARGETDIR)/sync.o  	\
-              $(TARGETDIR)/key.o   	\
-              $(TARGETDIR)/io.o    	\
-              $(TARGETDIR)/event.o	\
-              $(TARGETDIR)/srs.o
-OBJS        += $(EXTRA_OBJS)
-SRS    		= $(TARGETDIR)/srs
-
-linux-debug: all
-all: $(TARGETDIR) $(SRS)
-
-$(TARGETDIR):
-	if [ ! -d $(TARGETDIR) ]; then mkdir $(TARGETDIR); fi
-
-$(SRS): $(OBJS)
-	$(CC) $(CFLAGS) -o $@ $(OBJS)
-
-$(TARGETDIR)/md.o: md.S
-	$(CC) $(CFLAGS) -c $< -o $@
-
-$(TARGETDIR)/%.o: %.c common.h md.h Makefile
-	$(CC) $(CFLAGS) -c $< -o $@
-
-clean:
-	rm -rf $(TARGETDIR)
diff --git a/trunk/research/st/common.h b/trunk/research/st/common.h
deleted file mode 100644
index b83e575ca..000000000
--- a/trunk/research/st/common.h
+++ /dev/null
@@ -1,445 +0,0 @@
-/* 
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- * 
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- * 
- * The Original Code is the Netscape Portable Runtime library.
- * 
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation.  Portions created by Netscape are 
- * Copyright (C) 1994-2000 Netscape Communications Corporation.  All
- * Rights Reserved.
- * 
- * Contributor(s):  Silicon Graphics, Inc.
- * 
- * Portions created by SGI are Copyright (C) 2000-2001 Silicon
- * Graphics, Inc.  All Rights Reserved.
- * 
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable 
- * instead of those above.  If you wish to allow use of your 
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL.  If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
-
-/*
- * This file is derived directly from Netscape Communications Corporation,
- * and consists of extensive modifications made during the year(s) 1999-2000.
- */
-
-#ifndef __ST_COMMON_H__
-#define __ST_COMMON_H__
-
-#include 
-#include 
-#include 
-#include 
-#include 
-
-/* Enable assertions only if DEBUG is defined */
-#ifndef DEBUG
-    #define NDEBUG
-#endif
-#include 
-#define ST_ASSERT(expr) assert(expr)
-
-#define ST_BEGIN_MACRO  {
-#define ST_END_MACRO    }
-
-#ifdef DEBUG
-    #define ST_HIDDEN   /*nothing*/
-#else
-    #define    ST_HIDDEN   static
-#endif
-
-#include "public.h"
-#include "md.h"
-
-/*****************************************
- * Circular linked list definitions
- */
-
-typedef struct _st_clist {
-    struct _st_clist *next;
-    struct _st_clist *prev;
-} _st_clist_t;
-
-/* Insert element "_e" into the list, before "_l" */
-#define ST_INSERT_BEFORE(_e,_l)     \
-    ST_BEGIN_MACRO         \
-    (_e)->next = (_l);     \
-    (_e)->prev = (_l)->prev; \
-    (_l)->prev->next = (_e); \
-    (_l)->prev = (_e);     \
-    ST_END_MACRO
-
-/* Insert element "_e" into the list, after "_l" */
-#define ST_INSERT_AFTER(_e,_l)     \
-    ST_BEGIN_MACRO         \
-    (_e)->next = (_l)->next; \
-    (_e)->prev = (_l);     \
-    (_l)->next->prev = (_e); \
-    (_l)->next = (_e);     \
-    ST_END_MACRO
-
-/* Return the element following element "_e" */
-#define ST_NEXT_LINK(_e)  ((_e)->next)
-
-/* Append an element "_e" to the end of the list "_l" */
-#define ST_APPEND_LINK(_e,_l) ST_INSERT_BEFORE(_e,_l)
-
-/* Insert an element "_e" at the head of the list "_l" */
-#define ST_INSERT_LINK(_e,_l) ST_INSERT_AFTER(_e,_l)
-
-/* Return the head/tail of the list */
-#define ST_LIST_HEAD(_l) (_l)->next
-#define ST_LIST_TAIL(_l) (_l)->prev
-
-/* Remove the element "_e" from it's circular list */
-#define ST_REMOVE_LINK(_e)           \
-    ST_BEGIN_MACRO               \
-    (_e)->prev->next = (_e)->next; \
-    (_e)->next->prev = (_e)->prev; \
-    ST_END_MACRO
-
-/* Return non-zero if the given circular list "_l" is empty, */
-/* zero if the circular list is not empty */
-#define ST_CLIST_IS_EMPTY(_l) \
-    ((_l)->next == (_l))
-
-/* Initialize a circular list */
-#define ST_INIT_CLIST(_l)  \
-    ST_BEGIN_MACRO       \
-    (_l)->next = (_l); \
-    (_l)->prev = (_l); \
-    ST_END_MACRO
-
-#define ST_INIT_STATIC_CLIST(_l) \
-    {(_l), (_l)}
-
-
-/*****************************************
- * Basic types definitions
- */
-
-typedef void  (*_st_destructor_t)(void *);
-
-typedef struct _st_stack {
-    _st_clist_t links;
-    char *vaddr;                /* Base of stack's allocated memory */
-    int  vaddr_size;            /* Size of stack's allocated memory */
-    int  stk_size;              /* Size of usable portion of the stack */
-    char *stk_bottom;           /* Lowest address of stack's usable portion */
-    char *stk_top;              /* Highest address of stack's usable portion */
-    void *sp;                   /* Stack pointer from C's point of view */
-} _st_stack_t;
-
-
-typedef struct _st_cond {
-    _st_clist_t wait_q;          /* Condition variable wait queue */
-} _st_cond_t;
-
-
-typedef struct _st_thread _st_thread_t;
-
-struct _st_thread {
-    int state;                  /* Thread's state */
-    int flags;                  /* Thread's flags */
-
-    void *(*start)(void *arg);  /* The start function of the thread */
-    void *arg;                  /* Argument of the start function */
-    void *retval;               /* Return value of the start function */
-
-    _st_stack_t *stack;          /* Info about thread's stack */
-    
-    _st_clist_t links;          /* For putting on run/sleep/zombie queue */
-    _st_clist_t wait_links;     /* For putting on mutex/condvar wait queue */
-    #ifdef DEBUG
-    _st_clist_t tlink;          /* For putting on thread queue */
-    #endif
-
-    st_utime_t due;             /* Wakeup time when thread is sleeping */
-    _st_thread_t *left;         /* For putting in timeout heap */
-    _st_thread_t *right;          /* -- see docs/timeout_heap.txt for details */
-    int heap_index;
-    
-    void **private_data;        /* Per thread private data */
-    
-    _st_cond_t *term;           /* Termination condition variable for join */
-    
-    jmp_buf context;            /* Thread's context */
-};
-
-
-typedef struct _st_mutex {
-    _st_thread_t *owner;        /* Current mutex owner */
-    _st_clist_t  wait_q;        /* Mutex wait queue */
-} _st_mutex_t;
-
-
-typedef struct _st_pollq {
-    _st_clist_t links;          /* For putting on io queue */
-    _st_thread_t  *thread;      /* Polling thread */
-    struct pollfd *pds;         /* Array of poll descriptors */
-    int npds;                   /* Length of the array */
-    int on_ioq;                 /* Is it on ioq? */
-} _st_pollq_t;
-
-
-typedef struct _st_eventsys_ops {
-    const char *name;                          /* Name of this event system */
-    int  val;                                  /* Type of this event system */
-    int  (*init)(void);                        /* Initialization */
-    void (*dispatch)(void);                    /* Dispatch function */
-    int  (*pollset_add)(struct pollfd *, int); /* Add descriptor set */
-    void (*pollset_del)(struct pollfd *, int); /* Delete descriptor set */
-    int  (*fd_new)(int);                       /* New descriptor allocated */
-    int  (*fd_close)(int);                     /* Descriptor closed */
-    int  (*fd_getlimit)(void);                 /* Descriptor hard limit */
-} _st_eventsys_t;
-
-
-typedef struct _st_vp {
-    _st_thread_t *idle_thread;  /* Idle thread for this vp */
-    st_utime_t last_clock;      /* The last time we went into vp_check_clock() */
-    
-    _st_clist_t run_q;          /* run queue for this vp */
-    _st_clist_t io_q;           /* io queue for this vp */
-    _st_clist_t zombie_q;       /* zombie queue for this vp */
-    #ifdef DEBUG
-    _st_clist_t thread_q;       /* all threads of this vp */
-    #endif
-    int pagesize;
-    
-    _st_thread_t *sleep_q;      /* sleep queue for this vp */
-    int sleepq_size;          /* number of threads on sleep queue */
-    
-    #ifdef ST_SWITCH_CB
-    st_switch_cb_t switch_out_cb;    /* called when a thread is switched out */
-    st_switch_cb_t switch_in_cb;    /* called when a thread is switched in */
-    #endif
-} _st_vp_t;
-
-
-typedef struct _st_netfd {
-    int osfd;                   /* Underlying OS file descriptor */
-    int inuse;                  /* In-use flag */
-    void *private_data;         /* Per descriptor private data */
-    _st_destructor_t destructor; /* Private data destructor function */
-    void *aux_data;             /* Auxiliary data for internal use */
-    struct _st_netfd *next;     /* For putting on the free list */
-} _st_netfd_t;
-
-
-/*****************************************
- * Current vp, thread, and event system
- */
-
-extern _st_vp_t        _st_this_vp;
-extern _st_thread_t *_st_this_thread;
-extern _st_eventsys_t *_st_eventsys;
-
-#define _ST_CURRENT_THREAD()            (_st_this_thread)
-#define _ST_SET_CURRENT_THREAD(_thread) (_st_this_thread = (_thread))
-
-#define _ST_LAST_CLOCK                  (_st_this_vp.last_clock)
-
-#define _ST_RUNQ                        (_st_this_vp.run_q)
-#define _ST_IOQ                         (_st_this_vp.io_q)
-#define _ST_ZOMBIEQ                     (_st_this_vp.zombie_q)
-#ifdef DEBUG
-    #define _ST_THREADQ                     (_st_this_vp.thread_q)
-#endif
-
-#define _ST_PAGE_SIZE                   (_st_this_vp.pagesize)
-
-#define _ST_SLEEPQ                      (_st_this_vp.sleep_q)
-#define _ST_SLEEPQ_SIZE                 (_st_this_vp.sleepq_size)
-
-#define _ST_VP_IDLE()                   (*_st_eventsys->dispatch)()
-
-
-/*****************************************
- * vp queues operations
- */
-
-#define _ST_ADD_IOQ(_pq)    ST_APPEND_LINK(&_pq.links, &_ST_IOQ)
-#define _ST_DEL_IOQ(_pq)    ST_REMOVE_LINK(&_pq.links)
-
-#define _ST_ADD_RUNQ(_thr)  ST_APPEND_LINK(&(_thr)->links, &_ST_RUNQ)
-#define _ST_DEL_RUNQ(_thr)  ST_REMOVE_LINK(&(_thr)->links)
-
-#define _ST_ADD_SLEEPQ(_thr, _timeout)  _st_add_sleep_q(_thr, _timeout)
-#define _ST_DEL_SLEEPQ(_thr)        _st_del_sleep_q(_thr)
-
-#define _ST_ADD_ZOMBIEQ(_thr)  ST_APPEND_LINK(&(_thr)->links, &_ST_ZOMBIEQ)
-#define _ST_DEL_ZOMBIEQ(_thr)  ST_REMOVE_LINK(&(_thr)->links)
-
-#ifdef DEBUG
-    #define _ST_ADD_THREADQ(_thr)  ST_APPEND_LINK(&(_thr)->tlink, &_ST_THREADQ)
-    #define _ST_DEL_THREADQ(_thr)  ST_REMOVE_LINK(&(_thr)->tlink)
-#endif
-
-
-/*****************************************
- * Thread states and flags
- */
-
-#define _ST_ST_RUNNING      0 
-#define _ST_ST_RUNNABLE     1
-#define _ST_ST_IO_WAIT      2
-#define _ST_ST_LOCK_WAIT    3
-#define _ST_ST_COND_WAIT    4
-#define _ST_ST_SLEEPING     5
-#define _ST_ST_ZOMBIE       6
-#define _ST_ST_SUSPENDED    7
-
-#define _ST_FL_PRIMORDIAL   0x01
-#define _ST_FL_IDLE_THREAD  0x02
-#define _ST_FL_ON_SLEEPQ    0x04
-#define _ST_FL_INTERRUPT    0x08
-#define _ST_FL_TIMEDOUT     0x10
-
-/*****************************************
- * Pointer conversion
- */
-
-#ifndef offsetof
-    #define offsetof(type, identifier) ((size_t)&(((type *)0)->identifier))
-#endif
-
-#define _ST_THREAD_PTR(_qp)         \
-    ((_st_thread_t *)((char *)(_qp) - offsetof(_st_thread_t, links)))
-
-#define _ST_THREAD_WAITQ_PTR(_qp)   \
-    ((_st_thread_t *)((char *)(_qp) - offsetof(_st_thread_t, wait_links)))
-
-#define _ST_THREAD_STACK_PTR(_qp)   \
-    ((_st_stack_t *)((char*)(_qp) - offsetof(_st_stack_t, links)))
-
-#define _ST_POLLQUEUE_PTR(_qp)      \
-    ((_st_pollq_t *)((char *)(_qp) - offsetof(_st_pollq_t, links)))
-
-#ifdef DEBUG
-    #define _ST_THREAD_THREADQ_PTR(_qp) \
-        ((_st_thread_t *)((char *)(_qp) - offsetof(_st_thread_t, tlink)))
-#endif
-
-
-/*****************************************
- * Constants
- */
-
-#ifndef ST_UTIME_NO_TIMEOUT
-    #define ST_UTIME_NO_TIMEOUT ((st_utime_t) -1LL)
-#endif
-
-#define ST_DEFAULT_STACK_SIZE (64*1024)
-
-#ifndef ST_KEYS_MAX
-    #define ST_KEYS_MAX 16
-#endif
-
-#ifndef ST_MIN_POLLFDS_SIZE
-    #define ST_MIN_POLLFDS_SIZE 64
-#endif
-
-
-/*****************************************
- * Threads context switching
- */
-
-#ifdef DEBUG
-    void _st_iterate_threads(void);
-    #define ST_DEBUG_ITERATE_THREADS() _st_iterate_threads()
-#else
-    #define ST_DEBUG_ITERATE_THREADS()
-#endif
-
-#ifdef ST_SWITCH_CB
-    #define ST_SWITCH_OUT_CB(_thread)        \
-        if (_st_this_vp.switch_out_cb != NULL &&    \
-            _thread != _st_this_vp.idle_thread &&    \
-            _thread->state != _ST_ST_ZOMBIE) {    \
-          _st_this_vp.switch_out_cb();        \
-        }
-    #define ST_SWITCH_IN_CB(_thread)        \
-        if (_st_this_vp.switch_in_cb != NULL &&    \
-        _thread != _st_this_vp.idle_thread &&    \
-        _thread->state != _ST_ST_ZOMBIE) {    \
-          _st_this_vp.switch_in_cb();        \
-        }
-#else
-    #define ST_SWITCH_OUT_CB(_thread)
-    #define ST_SWITCH_IN_CB(_thread)
-#endif
-
-/*
- * Switch away from the current thread context by saving its state and
- * calling the thread scheduler
- */
-#define _ST_SWITCH_CONTEXT(_thread)       \
-    ST_BEGIN_MACRO                        \
-    ST_SWITCH_OUT_CB(_thread);            \
-    if (!MD_SETJMP((_thread)->context)) { \
-      _st_vp_schedule();                  \
-    }                                     \
-    ST_DEBUG_ITERATE_THREADS();           \
-    ST_SWITCH_IN_CB(_thread);             \
-    ST_END_MACRO
-
-/*
- * Restore a thread context that was saved by _ST_SWITCH_CONTEXT or
- * initialized by _ST_INIT_CONTEXT
- */
-#define _ST_RESTORE_CONTEXT(_thread)   \
-    ST_BEGIN_MACRO                     \
-    _ST_SET_CURRENT_THREAD(_thread);   \
-    MD_LONGJMP((_thread)->context, 1); \
-    ST_END_MACRO
-
-/*
- * Number of bytes reserved under the stack "bottom"
- */
-#define _ST_STACK_PAD_SIZE MD_STACK_PAD_SIZE
-
-
-/*****************************************
- * Forward declarations
- */
-
-void _st_vp_schedule(void);
-void _st_vp_check_clock(void);
-void *_st_idle_thread_start(void *arg);
-void _st_thread_main(void);
-void _st_thread_cleanup(_st_thread_t *thread);
-void _st_add_sleep_q(_st_thread_t *thread, st_utime_t timeout);
-void _st_del_sleep_q(_st_thread_t *thread);
-_st_stack_t *_st_stack_new(int stack_size);
-void _st_stack_free(_st_stack_t *ts);
-int _st_io_init(void);
-
-st_utime_t st_utime(void);
-_st_cond_t *st_cond_new(void);
-int st_cond_destroy(_st_cond_t *cvar);
-int st_cond_timedwait(_st_cond_t *cvar, st_utime_t timeout);
-int st_cond_signal(_st_cond_t *cvar);
-ssize_t st_read(_st_netfd_t *fd, void *buf, size_t nbyte, st_utime_t timeout);
-ssize_t st_write(_st_netfd_t *fd, const void *buf, size_t nbyte, st_utime_t timeout);
-int st_poll(struct pollfd *pds, int npds, st_utime_t timeout);
-_st_thread_t *st_thread_create(void *(*start)(void *arg), void *arg, int joinable, int stk_size);
-
-#endif /* !__ST_COMMON_H__ */
-
diff --git a/trunk/research/st/event.c b/trunk/research/st/event.c
deleted file mode 100644
index 5704f520a..000000000
--- a/trunk/research/st/event.c
+++ /dev/null
@@ -1,483 +0,0 @@
-/* 
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- * 
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- * 
- * The Original Code is the Netscape Portable Runtime library.
- * 
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation.  Portions created by Netscape are 
- * Copyright (C) 1994-2000 Netscape Communications Corporation.  All
- * Rights Reserved.
- * 
- * Contributor(s):  Silicon Graphics, Inc.
- *                  Yahoo! Inc.
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable 
- * instead of those above.  If you wish to allow use of your 
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL.  If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
-
-#include 
-#include 
-#include 
-#include 
-#include 
-#include 
-#include "common.h"
-
-#ifdef USE_POLL
-    #error "Not support USE_POLL"
-#endif
-#ifdef MD_HAVE_KQUEUE
-    #error "Not support MD_HAVE_KQUEUE"
-#endif
-#ifdef MD_HAVE_POLL
-    #error "Not support MD_HAVE_POLL"
-#endif
-#ifndef MD_HAVE_EPOLL
-    #error "Only support MD_HAVE_EPOLL"
-#endif
-
-#include 
-
-typedef struct _epoll_fd_data {
-    int rd_ref_cnt;
-    int wr_ref_cnt;
-    int ex_ref_cnt;
-    int revents;
-} _epoll_fd_data_t;
-
-static struct _st_epolldata {
-    _epoll_fd_data_t *fd_data;
-    struct epoll_event *evtlist;
-    int fd_data_size;
-    int evtlist_size;
-    int evtlist_cnt;
-    int fd_hint;
-    int epfd;
-    pid_t pid;
-} *_st_epoll_data;
-
-#ifndef ST_EPOLL_EVTLIST_SIZE
-/* Not a limit, just a hint */
-#define ST_EPOLL_EVTLIST_SIZE 4096
-#endif
-
-#define _ST_EPOLL_READ_CNT(fd)   (_st_epoll_data->fd_data[fd].rd_ref_cnt)
-#define _ST_EPOLL_WRITE_CNT(fd)  (_st_epoll_data->fd_data[fd].wr_ref_cnt)
-#define _ST_EPOLL_EXCEP_CNT(fd)  (_st_epoll_data->fd_data[fd].ex_ref_cnt)
-#define _ST_EPOLL_REVENTS(fd)    (_st_epoll_data->fd_data[fd].revents)
-
-#define _ST_EPOLL_READ_BIT(fd)   (_ST_EPOLL_READ_CNT(fd) ? EPOLLIN : 0)
-#define _ST_EPOLL_WRITE_BIT(fd)  (_ST_EPOLL_WRITE_CNT(fd) ? EPOLLOUT : 0)
-#define _ST_EPOLL_EXCEP_BIT(fd)  (_ST_EPOLL_EXCEP_CNT(fd) ? EPOLLPRI : 0)
-#define _ST_EPOLL_EVENTS(fd) \
-    (_ST_EPOLL_READ_BIT(fd)|_ST_EPOLL_WRITE_BIT(fd)|_ST_EPOLL_EXCEP_BIT(fd))
-
-_st_eventsys_t *_st_eventsys = NULL;
-
-/*****************************************
- * epoll event system
- */
-
-ST_HIDDEN int _st_epoll_init(void)
-{
-    int fdlim;
-    int err = 0;
-    int rv = 0;
-
-    _st_epoll_data = (struct _st_epolldata *) calloc(1, sizeof(*_st_epoll_data));
-    if (!_st_epoll_data) {
-        return -1;
-    }
-
-    fdlim = st_getfdlimit();
-    _st_epoll_data->fd_hint = (fdlim > 0 && fdlim < ST_EPOLL_EVTLIST_SIZE) ? fdlim : ST_EPOLL_EVTLIST_SIZE;
-
-    if ((_st_epoll_data->epfd = epoll_create(_st_epoll_data->fd_hint)) < 0) {
-        err = errno;
-        rv = -1;
-        goto cleanup_epoll;
-    }
-    fcntl(_st_epoll_data->epfd, F_SETFD, FD_CLOEXEC);
-    _st_epoll_data->pid = getpid();
-
-    /* Allocate file descriptor data array */
-    _st_epoll_data->fd_data_size = _st_epoll_data->fd_hint;
-    _st_epoll_data->fd_data = (_epoll_fd_data_t *)calloc(_st_epoll_data->fd_data_size, sizeof(_epoll_fd_data_t));
-    if (!_st_epoll_data->fd_data) {
-        err = errno;
-        rv = -1;
-        goto cleanup_epoll;
-    }
-
-    /* Allocate event lists */
-    _st_epoll_data->evtlist_size = _st_epoll_data->fd_hint;
-    _st_epoll_data->evtlist = (struct epoll_event *)malloc(_st_epoll_data->evtlist_size * sizeof(struct epoll_event));
-    if (!_st_epoll_data->evtlist) {
-        err = errno;
-        rv = -1;
-    }
-
- cleanup_epoll:
-    if (rv < 0) {
-        if (_st_epoll_data->epfd >= 0) {
-            close(_st_epoll_data->epfd);
-        }
-        free(_st_epoll_data->fd_data);
-        free(_st_epoll_data->evtlist);
-        free(_st_epoll_data);
-        _st_epoll_data = NULL;
-        errno = err;
-    }
-
-    return rv;
-}
-
-ST_HIDDEN int _st_epoll_fd_data_expand(int maxfd)
-{
-    _epoll_fd_data_t *ptr;
-    int n = _st_epoll_data->fd_data_size;
-
-    while (maxfd >= n) {
-        n <<= 1;
-    }
-
-    ptr = (_epoll_fd_data_t *)realloc(_st_epoll_data->fd_data, n * sizeof(_epoll_fd_data_t));
-    if (!ptr) {
-        return -1;
-    }
-
-    memset(ptr + _st_epoll_data->fd_data_size, 0, (n - _st_epoll_data->fd_data_size) * sizeof(_epoll_fd_data_t));
-
-    _st_epoll_data->fd_data = ptr;
-    _st_epoll_data->fd_data_size = n;
-
-    return 0;
-}
-
-ST_HIDDEN void _st_epoll_evtlist_expand(void)
-{
-    struct epoll_event *ptr;
-    int n = _st_epoll_data->evtlist_size;
-
-    while (_st_epoll_data->evtlist_cnt > n) {
-        n <<= 1;
-    }
-
-    ptr = (struct epoll_event *)realloc(_st_epoll_data->evtlist, n * sizeof(struct epoll_event));
-    if (ptr) {
-        _st_epoll_data->evtlist = ptr;
-        _st_epoll_data->evtlist_size = n;
-    }
-}
-
-ST_HIDDEN void _st_epoll_pollset_del(struct pollfd *pds, int npds)
-{
-    struct epoll_event ev;
-    struct pollfd *pd;
-    struct pollfd *epd = pds + npds;
-    int old_events, events, op;
-
-    /*
-     * It's more or less OK if deleting fails because a descriptor
-     * will either be closed or deleted in dispatch function after
-     * it fires.
-     */
-    for (pd = pds; pd < epd; pd++) {
-        old_events = _ST_EPOLL_EVENTS(pd->fd);
-
-        if (pd->events & POLLIN) {
-            _ST_EPOLL_READ_CNT(pd->fd)--;
-        }
-        if (pd->events & POLLOUT) {
-            _ST_EPOLL_WRITE_CNT(pd->fd)--;
-        }
-        if (pd->events & POLLPRI) {
-            _ST_EPOLL_EXCEP_CNT(pd->fd)--;
-        }
-
-        events = _ST_EPOLL_EVENTS(pd->fd);
-        /*
-         * The _ST_EPOLL_REVENTS check below is needed so we can use
-         * this function inside dispatch(). Outside of dispatch()
-         * _ST_EPOLL_REVENTS is always zero for all descriptors.
-         */
-        if (events != old_events && _ST_EPOLL_REVENTS(pd->fd) == 0) {
-            op = events ? EPOLL_CTL_MOD : EPOLL_CTL_DEL;
-            ev.events = events;
-            ev.data.fd = pd->fd;
-            if (epoll_ctl(_st_epoll_data->epfd, op, pd->fd, &ev) == 0 && op == EPOLL_CTL_DEL) {
-                _st_epoll_data->evtlist_cnt--;
-            }
-        }
-    }
-}
-
-ST_HIDDEN int _st_epoll_pollset_add(struct pollfd *pds, int npds)
-{
-    struct epoll_event ev;
-    int i, fd;
-    int old_events, events, op;
-
-    /* Do as many checks as possible up front */
-    for (i = 0; i < npds; i++) {
-        fd = pds[i].fd;
-        if (fd < 0 || !pds[i].events || (pds[i].events & ~(POLLIN | POLLOUT | POLLPRI))) {
-            errno = EINVAL;
-            return -1;
-        }
-        if (fd >= _st_epoll_data->fd_data_size && _st_epoll_fd_data_expand(fd) < 0) {
-            return -1;
-        }
-    }
-
-    for (i = 0; i < npds; i++) {
-        fd = pds[i].fd;
-        old_events = _ST_EPOLL_EVENTS(fd);
-
-        if (pds[i].events & POLLIN) {
-            _ST_EPOLL_READ_CNT(fd)++;
-        }
-        if (pds[i].events & POLLOUT) {
-            _ST_EPOLL_WRITE_CNT(fd)++;
-        }
-        if (pds[i].events & POLLPRI) {
-            _ST_EPOLL_EXCEP_CNT(fd)++;
-        }
-
-        events = _ST_EPOLL_EVENTS(fd);
-        if (events != old_events) {
-            op = old_events ? EPOLL_CTL_MOD : EPOLL_CTL_ADD;
-            ev.events = events;
-            ev.data.fd = fd;
-            if (epoll_ctl(_st_epoll_data->epfd, op, fd, &ev) < 0 && (op != EPOLL_CTL_ADD || errno != EEXIST)) {
-                break;
-            }
-            if (op == EPOLL_CTL_ADD) {
-                _st_epoll_data->evtlist_cnt++;
-                if (_st_epoll_data->evtlist_cnt > _st_epoll_data->evtlist_size) {
-                    _st_epoll_evtlist_expand();
-                }
-            }
-        }
-    }
-
-    if (i < npds) {
-        /* Error */
-        int err = errno;
-        /* Unroll the state */
-        _st_epoll_pollset_del(pds, i + 1);
-        errno = err;
-        return -1;
-    }
-
-    return 0;
-}
-
-ST_HIDDEN void _st_epoll_dispatch(void)
-{
-    st_utime_t min_timeout;
-    _st_clist_t *q;
-    _st_pollq_t *pq;
-    struct pollfd *pds, *epds;
-    struct epoll_event ev;
-    int timeout, nfd, i, osfd, notify;
-    int events, op;
-    short revents;
-
-    if (_ST_SLEEPQ == NULL) {
-        timeout = -1;
-    } else {
-        min_timeout = (_ST_SLEEPQ->due <= _ST_LAST_CLOCK) ? 0 : (_ST_SLEEPQ->due - _ST_LAST_CLOCK);
-        timeout = (int) (min_timeout / 1000);
-    }
-
-    if (_st_epoll_data->pid != getpid()) {
-        // WINLIN: remove it for bug introduced.
-        // @see: https://github.com/ossrs/srs/issues/193
-        exit(-1);
-    }
-
-    /* Check for I/O operations */
-    nfd = epoll_wait(_st_epoll_data->epfd, _st_epoll_data->evtlist, _st_epoll_data->evtlist_size, timeout);
-
-    if (nfd > 0) {
-        for (i = 0; i < nfd; i++) {
-            osfd = _st_epoll_data->evtlist[i].data.fd;
-            _ST_EPOLL_REVENTS(osfd) = _st_epoll_data->evtlist[i].events;
-            if (_ST_EPOLL_REVENTS(osfd) & (EPOLLERR | EPOLLHUP)) {
-                /* Also set I/O bits on error */
-                _ST_EPOLL_REVENTS(osfd) |= _ST_EPOLL_EVENTS(osfd);
-            }
-        }
-
-        for (q = _ST_IOQ.next; q != &_ST_IOQ; q = q->next) {
-            pq = _ST_POLLQUEUE_PTR(q);
-            notify = 0;
-            epds = pq->pds + pq->npds;
-
-            for (pds = pq->pds; pds < epds; pds++) {
-                if (_ST_EPOLL_REVENTS(pds->fd) == 0) {
-                    pds->revents = 0;
-                    continue;
-                }
-                osfd = pds->fd;
-                events = pds->events;
-                revents = 0;
-                if ((events & POLLIN) && (_ST_EPOLL_REVENTS(osfd) & EPOLLIN)) {
-                    revents |= POLLIN;
-                }
-                if ((events & POLLOUT) && (_ST_EPOLL_REVENTS(osfd) & EPOLLOUT)) {
-                    revents |= POLLOUT;
-                }
-                if ((events & POLLPRI) && (_ST_EPOLL_REVENTS(osfd) & EPOLLPRI)) {
-                    revents |= POLLPRI;
-                }
-                if (_ST_EPOLL_REVENTS(osfd) & EPOLLERR) {
-                    revents |= POLLERR;
-                }
-                if (_ST_EPOLL_REVENTS(osfd) & EPOLLHUP) {
-                    revents |= POLLHUP;
-                }
-
-                pds->revents = revents;
-                if (revents) {
-                    notify = 1;
-                }
-            }
-            if (notify) {
-                ST_REMOVE_LINK(&pq->links);
-                pq->on_ioq = 0;
-                /*
-                 * Here we will only delete/modify descriptors that
-                 * didn't fire (see comments in _st_epoll_pollset_del()).
-                 */
-                _st_epoll_pollset_del(pq->pds, pq->npds);
-
-                if (pq->thread->flags & _ST_FL_ON_SLEEPQ) {
-                    _ST_DEL_SLEEPQ(pq->thread);
-                }
-                pq->thread->state = _ST_ST_RUNNABLE;
-                _ST_ADD_RUNQ(pq->thread);
-            }
-        }
-
-        for (i = 0; i < nfd; i++) {
-            /* Delete/modify descriptors that fired */
-            osfd = _st_epoll_data->evtlist[i].data.fd;
-            _ST_EPOLL_REVENTS(osfd) = 0;
-            events = _ST_EPOLL_EVENTS(osfd);
-            op = events ? EPOLL_CTL_MOD : EPOLL_CTL_DEL;
-            ev.events = events;
-            ev.data.fd = osfd;
-            if (epoll_ctl(_st_epoll_data->epfd, op, osfd, &ev) == 0 && op == EPOLL_CTL_DEL) {
-                _st_epoll_data->evtlist_cnt--;
-            }
-        }
-    }
-}
-
-ST_HIDDEN int _st_epoll_fd_new(int osfd)
-{
-    if (osfd >= _st_epoll_data->fd_data_size && _st_epoll_fd_data_expand(osfd) < 0) {
-        return -1;
-    }
-
-    return 0;   
-}
-
-ST_HIDDEN int _st_epoll_fd_close(int osfd)
-{
-    if (_ST_EPOLL_READ_CNT(osfd) || _ST_EPOLL_WRITE_CNT(osfd) || _ST_EPOLL_EXCEP_CNT(osfd)) {
-        errno = EBUSY;
-        return -1;
-    }
-
-    return 0;
-}
-
-ST_HIDDEN int _st_epoll_fd_getlimit(void)
-{
-    /* zero means no specific limit */
-    return 0;
-}
-
-/*
- * Check if epoll functions are just stubs.
- */
-ST_HIDDEN int _st_epoll_is_supported(void)
-{
-    struct epoll_event ev;
-
-    ev.events = EPOLLIN;
-    ev.data.ptr = NULL;
-    /* Guaranteed to fail */
-    epoll_ctl(-1, EPOLL_CTL_ADD, -1, &ev);
-
-    return (errno != ENOSYS);
-}
-
-static _st_eventsys_t _st_epoll_eventsys = {
-    "epoll",
-    ST_EVENTSYS_ALT,
-    _st_epoll_init,
-    _st_epoll_dispatch,
-    _st_epoll_pollset_add,
-    _st_epoll_pollset_del,
-    _st_epoll_fd_new,
-    _st_epoll_fd_close,
-    _st_epoll_fd_getlimit
-};
-
-/*****************************************
- * Public functions
- */
-
-int st_set_eventsys(int eventsys)
-{
-    if (_st_eventsys) {
-        errno = EBUSY;
-        return -1;
-    }
-
-    switch (eventsys) {
-    case ST_EVENTSYS_DEFAULT:
-    case ST_EVENTSYS_ALT:
-    default:
-        if (_st_epoll_is_supported()) {
-            _st_eventsys = &_st_epoll_eventsys;
-            break;
-        }
-        errno = EINVAL;
-        return -1;
-    }
-
-    return 0;
-}
-
-int st_get_eventsys(void)
-{
-    return _st_eventsys ? _st_eventsys->val : -1;
-}
-
-const char *st_get_eventsys_name(void)
-{
-    return _st_eventsys ? _st_eventsys->name : "";
-}
-
diff --git a/trunk/research/st/io.c b/trunk/research/st/io.c
deleted file mode 100644
index bc77dc8e1..000000000
--- a/trunk/research/st/io.c
+++ /dev/null
@@ -1,792 +0,0 @@
-/* 
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- * 
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- * 
- * The Original Code is the Netscape Portable Runtime library.
- * 
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation.  Portions created by Netscape are 
- * Copyright (C) 1994-2000 Netscape Communications Corporation.  All
- * Rights Reserved.
- * 
- * Contributor(s):  Silicon Graphics, Inc.
- * 
- * Portions created by SGI are Copyright (C) 2000-2001 Silicon
- * Graphics, Inc.  All Rights Reserved.
- * 
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable 
- * instead of those above.  If you wish to allow use of your 
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL.  If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
-
-/*
- * This file is derived directly from Netscape Communications Corporation,
- * and consists of extensive modifications made during the year(s) 1999-2000.
- */
-
-#include 
-#include 
-#include 
-#include 
-#include 
-#include 
-#include 
-#include 
-#include 
-#include 
-#include 
-#include "common.h"
-
-#if EAGAIN != EWOULDBLOCK
-    #define _IO_NOT_READY_ERROR  ((errno == EAGAIN) || (errno == EWOULDBLOCK))
-#else
-    #define _IO_NOT_READY_ERROR  (errno == EAGAIN)
-#endif
-
-#define _LOCAL_MAXIOV  16
-
-/* File descriptor object free list */
-static _st_netfd_t *_st_netfd_freelist = NULL;
-/* Maximum number of file descriptors that the process can open */
-static int _st_osfd_limit = -1;
-
-static void _st_netfd_free_aux_data(_st_netfd_t *fd);
-
-int _st_io_init(void)
-{
-    struct sigaction sigact;
-    struct rlimit rlim;
-    int fdlim;
-
-    /* Ignore SIGPIPE */
-    sigact.sa_handler = SIG_IGN;
-    sigemptyset(&sigact.sa_mask);
-    sigact.sa_flags = 0;
-    if (sigaction(SIGPIPE, &sigact, NULL) < 0) {
-        return -1;
-    }
-
-    /* Set maximum number of open file descriptors */
-    if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) {
-        return -1;
-    }
-
-    fdlim = (*_st_eventsys->fd_getlimit)();
-    if (fdlim > 0 && rlim.rlim_max > (rlim_t) fdlim) {
-        rlim.rlim_max = fdlim;
-    }
-    rlim.rlim_cur = rlim.rlim_max;
-    if (setrlimit(RLIMIT_NOFILE, &rlim) < 0) {
-        return -1;
-    }
-    _st_osfd_limit = (int) rlim.rlim_max;
-    
-    return 0;
-}
-
-int st_getfdlimit(void)
-{
-    return _st_osfd_limit;
-}
-
-void st_netfd_free(_st_netfd_t *fd)
-{
-    if (!fd->inuse) {
-        return;
-    }
-    
-    fd->inuse = 0;
-    if (fd->aux_data) {
-        _st_netfd_free_aux_data(fd);
-    }
-    if (fd->private_data && fd->destructor) {
-        (*(fd->destructor))(fd->private_data);
-    }
-    fd->private_data = NULL;
-    fd->destructor = NULL;
-    fd->next = _st_netfd_freelist;
-    _st_netfd_freelist = fd;
-}
-
-static _st_netfd_t *_st_netfd_new(int osfd, int nonblock, int is_socket)
-{
-    _st_netfd_t *fd;
-    int flags = 1;
-    
-    if ((*_st_eventsys->fd_new)(osfd) < 0) {
-        return NULL;
-    }
-    
-    if (_st_netfd_freelist) {
-        fd = _st_netfd_freelist;
-        _st_netfd_freelist = _st_netfd_freelist->next;
-    } else {
-        fd = calloc(1, sizeof(_st_netfd_t));
-        if (!fd) {
-            return NULL;
-        }
-    }
-    
-    fd->osfd = osfd;
-    fd->inuse = 1;
-    fd->next = NULL;
-    
-    if (nonblock) {
-        /* Use just one system call */
-        if (is_socket && ioctl(osfd, FIONBIO, &flags) != -1) {
-            return fd;
-        }
-        /* Do it the Posix way */
-        if ((flags = fcntl(osfd, F_GETFL, 0)) < 0 || fcntl(osfd, F_SETFL, flags | O_NONBLOCK) < 0) {
-            st_netfd_free(fd);
-            return NULL;
-        }
-    }
-    
-    return fd;
-}
-
-_st_netfd_t *st_netfd_open(int osfd)
-{
-    return _st_netfd_new(osfd, 1, 0);
-}
-
-_st_netfd_t *st_netfd_open_socket(int osfd)
-{
-    return _st_netfd_new(osfd, 1, 1);
-}
-
-int st_netfd_close(_st_netfd_t *fd)
-{
-    if ((*_st_eventsys->fd_close)(fd->osfd) < 0) {
-        return -1;
-    }
-
-    st_netfd_free(fd);
-    return close(fd->osfd);
-}
-
-int st_netfd_fileno(_st_netfd_t *fd)
-{
-    return (fd->osfd);
-}
-
-void st_netfd_setspecific(_st_netfd_t *fd, void *value, _st_destructor_t destructor)
-{
-    if (value != fd->private_data) {
-        /* Free up previously set non-NULL data value */
-        if (fd->private_data && fd->destructor) {
-            (*(fd->destructor))(fd->private_data);
-        }
-    }
-    fd->private_data = value;
-    fd->destructor = destructor;
-}
-
-void *st_netfd_getspecific(_st_netfd_t *fd)
-{
-    return (fd->private_data);
-}
-
-/*
- * Wait for I/O on a single descriptor.
- */
-int st_netfd_poll(_st_netfd_t *fd, int how, st_utime_t timeout)
-{
-    struct pollfd pd;
-    int n;
-    
-    pd.fd = fd->osfd;
-    pd.events = (short) how;
-    pd.revents = 0;
-    
-    if ((n = st_poll(&pd, 1, timeout)) < 0) {
-        return -1;
-    }
-    if (n == 0) {
-        /* Timed out */
-        errno = ETIME;
-        return -1;
-    }
-    if (pd.revents & POLLNVAL) {
-        errno = EBADF;
-        return -1;
-    }
-    
-    return 0;
-}
-
-#ifdef MD_ALWAYS_UNSERIALIZED_ACCEPT
-/* No-op */
-int st_netfd_serialize_accept(_st_netfd_t *fd)
-{
-    fd->aux_data = NULL;
-    return 0;
-}
-
-/* No-op */
-static void _st_netfd_free_aux_data(_st_netfd_t *fd)
-{
-    fd->aux_data = NULL;
-}
-
-_st_netfd_t *st_accept(_st_netfd_t *fd, struct sockaddr *addr, int *addrlen, st_utime_t timeout)
-{
-    int osfd, err;
-    _st_netfd_t *newfd;
-    
-    while ((osfd = accept(fd->osfd, addr, (socklen_t *)addrlen)) < 0) {
-        if (errno == EINTR) {
-            continue;
-        }
-        if (!_IO_NOT_READY_ERROR) {
-            return NULL;
-        }
-        /* Wait until the socket becomes readable */
-        if (st_netfd_poll(fd, POLLIN, timeout) < 0) {
-            return NULL;
-        }
-    }
-    
-    /* On some platforms the new socket created by accept() inherits */
-    /* the nonblocking attribute of the listening socket */
-#if defined (MD_ACCEPT_NB_INHERITED)
-    newfd = _st_netfd_new(osfd, 0, 1);
-#elif defined (MD_ACCEPT_NB_NOT_INHERITED)
-    newfd = _st_netfd_new(osfd, 1, 1);
-#else
-    #error Unknown OS
-#endif
-    
-    if (!newfd) {
-        err = errno;
-        close(osfd);
-        errno = err;
-    }
-    
-    return newfd;
-}
-
-#else /* MD_ALWAYS_UNSERIALIZED_ACCEPT */
-/*
- * On some platforms accept() calls from different processes
- * on the same listen socket must be serialized.
- * The following code serializes accept()'s without process blocking.
- * A pipe is used as an inter-process semaphore.
- */
-int st_netfd_serialize_accept(_st_netfd_t *fd)
-{
-    _st_netfd_t **p;
-    int osfd[2], err;
-    
-    if (fd->aux_data) {
-        errno = EINVAL;
-        return -1;
-    }
-    if ((p = (_st_netfd_t **)calloc(2, sizeof(_st_netfd_t *))) == NULL) {
-        return -1;
-    }
-    if (pipe(osfd) < 0) {
-        free(p);
-        return -1;
-    }
-    if ((p[0] = st_netfd_open(osfd[0])) != NULL && (p[1] = st_netfd_open(osfd[1])) != NULL && write(osfd[1], " ", 1) == 1) {
-        fd->aux_data = p;
-        return 0;
-    }
-    /* Error */
-    err = errno;
-    if (p[0]) {
-        st_netfd_free(p[0]);
-    }
-    if (p[1]) {
-        st_netfd_free(p[1]);
-    }
-    close(osfd[0]);
-    close(osfd[1]);
-    free(p);
-    errno = err;
-    
-    return -1;
-}
-
-static void _st_netfd_free_aux_data(_st_netfd_t *fd)
-{
-    _st_netfd_t **p = (_st_netfd_t **) fd->aux_data;
-    
-    st_netfd_close(p[0]);
-    st_netfd_close(p[1]);
-    free(p);
-    fd->aux_data = NULL;
-}
-
-_st_netfd_t *st_accept(_st_netfd_t *fd, struct sockaddr *addr, int *addrlen, st_utime_t timeout)
-{
-    int osfd, err;
-    _st_netfd_t *newfd;
-    _st_netfd_t **p = (_st_netfd_t **) fd->aux_data;
-    ssize_t n;
-    char c;
-    
-    for ( ; ; ) {
-        if (p == NULL) {
-            osfd = accept(fd->osfd, addr, (socklen_t *)addrlen);
-        } else {
-            /* Get the lock */
-            n = st_read(p[0], &c, 1, timeout);
-            if (n < 0) {
-                return NULL;
-            }
-            ST_ASSERT(n == 1);
-            /* Got the lock */
-            osfd = accept(fd->osfd, addr, (socklen_t *)addrlen);
-            /* Unlock */
-            err = errno;
-            n = st_write(p[1], &c, 1, timeout);
-            ST_ASSERT(n == 1);
-            errno = err;
-        }
-        if (osfd >= 0) {
-            break;
-        }
-        if (errno == EINTR) {
-            continue;
-        }
-        if (!_IO_NOT_READY_ERROR) {
-            return NULL;
-        }
-        /* Wait until the socket becomes readable */
-        if (st_netfd_poll(fd, POLLIN, timeout) < 0) {
-            return NULL;
-        }
-    }
-    
-    /* On some platforms the new socket created by accept() inherits */
-    /* the nonblocking attribute of the listening socket */
-#if defined (MD_ACCEPT_NB_INHERITED)
-    newfd = _st_netfd_new(osfd, 0, 1);
-#elif defined (MD_ACCEPT_NB_NOT_INHERITED)
-    newfd = _st_netfd_new(osfd, 1, 1);
-#else
-    #error Unknown OS
-#endif
-    
-    if (!newfd) {
-        err = errno;
-        close(osfd);
-        errno = err;
-    }
-    
-    return newfd;
-}
-#endif /* MD_ALWAYS_UNSERIALIZED_ACCEPT */
-
-int st_connect(_st_netfd_t *fd, const struct sockaddr *addr, int addrlen, st_utime_t timeout)
-{
-    int n, err = 0;
-    
-    while (connect(fd->osfd, addr, addrlen) < 0) {
-        if (errno != EINTR) {
-            /*
-            * On some platforms, if connect() is interrupted (errno == EINTR)
-            * after the kernel binds the socket, a subsequent connect()
-            * attempt will fail with errno == EADDRINUSE.  Ignore EADDRINUSE
-            * iff connect() was previously interrupted.  See Rich Stevens'
-            * "UNIX Network Programming," Vol. 1, 2nd edition, p. 413
-            * ("Interrupted connect").
-            */
-            if (errno != EINPROGRESS && (errno != EADDRINUSE || err == 0)) {
-                return -1;
-            }
-            /* Wait until the socket becomes writable */
-            if (st_netfd_poll(fd, POLLOUT, timeout) < 0) {
-                return -1;
-            }
-            /* Try to find out whether the connection setup succeeded or failed */
-            n = sizeof(int);
-            if (getsockopt(fd->osfd, SOL_SOCKET, SO_ERROR, (char *)&err, (socklen_t *)&n) < 0) {
-                return -1;
-            }
-            if (err) {
-                errno = err;
-                return -1;
-            }
-            break;
-        }
-        err = 1;
-    }
-    
-    return 0;
-}
-
-ssize_t st_read(_st_netfd_t *fd, void *buf, size_t nbyte, st_utime_t timeout)
-{
-    ssize_t n;
-    
-    while ((n = read(fd->osfd, buf, nbyte)) < 0) {
-        if (errno == EINTR) {
-            continue;
-        }
-        if (!_IO_NOT_READY_ERROR) {
-            return -1;
-        }
-        /* Wait until the socket becomes readable */
-        if (st_netfd_poll(fd, POLLIN, timeout) < 0) {
-            return -1;
-        }
-    }
-    
-    return n;
-}
-
-int st_read_resid(_st_netfd_t *fd, void *buf, size_t *resid, st_utime_t timeout)
-{
-    struct iovec iov, *riov;
-    int riov_size, rv;
-    
-    iov.iov_base = buf;
-    iov.iov_len = *resid;
-    riov = &iov;
-    riov_size = 1;
-    rv = st_readv_resid(fd, &riov, &riov_size, timeout);
-    *resid = iov.iov_len;
-    return rv;
-}
-
-ssize_t st_readv(_st_netfd_t *fd, const struct iovec *iov, int iov_size, st_utime_t timeout)
-{
-    ssize_t n;
-    
-    while ((n = readv(fd->osfd, iov, iov_size)) < 0) {
-        if (errno == EINTR) {
-            continue;
-        }
-        if (!_IO_NOT_READY_ERROR) {
-            return -1;
-        }
-        /* Wait until the socket becomes readable */
-        if (st_netfd_poll(fd, POLLIN, timeout) < 0) {
-            return -1;
-        }
-    }
-    
-    return n;
-}
-
-int st_readv_resid(_st_netfd_t *fd, struct iovec **iov, int *iov_size, st_utime_t timeout)
-{
-    ssize_t n;
-    
-    while (*iov_size > 0) {
-        if (*iov_size == 1) {
-            n = read(fd->osfd, (*iov)->iov_base, (*iov)->iov_len);
-        } else {
-            n = readv(fd->osfd, *iov, *iov_size);
-        }
-        if (n < 0) {
-            if (errno == EINTR) {
-                continue;
-            }
-            if (!_IO_NOT_READY_ERROR) {
-                return -1;
-            }
-        } else if (n == 0) {
-            break;
-        } else {
-            while ((size_t) n >= (*iov)->iov_len) {
-                n -= (*iov)->iov_len;
-                (*iov)->iov_base = (char *) (*iov)->iov_base + (*iov)->iov_len;
-                (*iov)->iov_len = 0;
-                (*iov)++;
-                (*iov_size)--;
-                if (n == 0) {
-                    break;
-                }
-            }
-            if (*iov_size == 0) {
-                break;
-            }
-            (*iov)->iov_base = (char *) (*iov)->iov_base + n;
-            (*iov)->iov_len -= n;
-        }
-        /* Wait until the socket becomes readable */
-        if (st_netfd_poll(fd, POLLIN, timeout) < 0) {
-            return -1;
-        }
-    }
-    
-    return 0;
-}
-
-ssize_t st_read_fully(_st_netfd_t *fd, void *buf, size_t nbyte, st_utime_t timeout)
-{
-    size_t resid = nbyte;
-    return st_read_resid(fd, buf, &resid, timeout) == 0 ? (ssize_t) (nbyte - resid) : -1;
-}
-
-int st_write_resid(_st_netfd_t *fd, const void *buf, size_t *resid, st_utime_t timeout)
-{
-    struct iovec iov, *riov;
-    int riov_size, rv;
-    
-    iov.iov_base = (void *) buf;        /* we promise not to modify buf */
-    iov.iov_len = *resid;
-    riov = &iov;
-    riov_size = 1;
-    rv = st_writev_resid(fd, &riov, &riov_size, timeout);
-    *resid = iov.iov_len;
-    return rv;
-}
-
-ssize_t st_write(_st_netfd_t *fd, const void *buf, size_t nbyte, st_utime_t timeout)
-{
-    size_t resid = nbyte;
-    return st_write_resid(fd, buf, &resid, timeout) == 0 ? (ssize_t) (nbyte - resid) : -1;
-}
-
-ssize_t st_writev(_st_netfd_t *fd, const struct iovec *iov, int iov_size, st_utime_t timeout)
-{
-    ssize_t n, rv;
-    size_t nleft, nbyte;
-    int index, iov_cnt;
-    struct iovec *tmp_iov;
-    struct iovec local_iov[_LOCAL_MAXIOV];
-    
-    /* Calculate the total number of bytes to be sent */
-    nbyte = 0;
-    for (index = 0; index < iov_size; index++) {
-        nbyte += iov[index].iov_len;
-    }
-    
-    rv = (ssize_t)nbyte;
-    nleft = nbyte;
-    tmp_iov = (struct iovec *) iov;    /* we promise not to modify iov */
-    iov_cnt = iov_size;
-    
-    while (nleft > 0) {
-        if (iov_cnt == 1) {
-            if (st_write(fd, tmp_iov[0].iov_base, nleft, timeout) != (ssize_t) nleft) {
-                rv = -1;
-            }
-            break;
-        }
-        if ((n = writev(fd->osfd, tmp_iov, iov_cnt)) < 0) {
-            if (errno == EINTR) {
-                continue;
-            }
-            if (!_IO_NOT_READY_ERROR) {
-                rv = -1;
-                break;
-            }
-        } else {
-            if ((size_t) n == nleft) {
-                break;
-            }
-            nleft -= n;
-            /* Find the next unwritten vector */
-            n = (ssize_t)(nbyte - nleft);
-            for (index = 0; (size_t) n >= iov[index].iov_len; index++) {
-                n -= iov[index].iov_len;
-            }
-            
-            if (tmp_iov == iov) {
-                /* Must copy iov's around */
-                if (iov_size - index <= _LOCAL_MAXIOV) {
-                    tmp_iov = local_iov;
-                } else {
-                    tmp_iov = calloc(1, (iov_size - index) * sizeof(struct iovec));
-                    if (tmp_iov == NULL) {
-                        return -1;
-                    }
-                }
-            }
-            
-            /* Fill in the first partial read */
-            tmp_iov[0].iov_base = &(((char *)iov[index].iov_base)[n]);
-            tmp_iov[0].iov_len = iov[index].iov_len - n;
-            index++;
-            /* Copy the remaining vectors */
-            for (iov_cnt = 1; index < iov_size; iov_cnt++, index++) {
-                tmp_iov[iov_cnt].iov_base = iov[index].iov_base;
-                tmp_iov[iov_cnt].iov_len = iov[index].iov_len;
-            }
-        }
-        /* Wait until the socket becomes writable */
-        if (st_netfd_poll(fd, POLLOUT, timeout) < 0) {
-            rv = -1;
-            break;
-        }
-    }
-    
-    if (tmp_iov != iov && tmp_iov != local_iov) {
-        free(tmp_iov);
-    }
-    
-    return rv;
-}
-
-int st_writev_resid(_st_netfd_t *fd, struct iovec **iov, int *iov_size, st_utime_t timeout)
-{
-    ssize_t n;
-    
-    while (*iov_size > 0) {
-        if (*iov_size == 1) {
-            n = write(fd->osfd, (*iov)->iov_base, (*iov)->iov_len);
-        } else {
-            n = writev(fd->osfd, *iov, *iov_size);
-        }
-        if (n < 0) {
-            if (errno == EINTR) {
-                continue;
-            }
-            if (!_IO_NOT_READY_ERROR) {
-                return -1;
-            }
-        } else {
-            while ((size_t) n >= (*iov)->iov_len) {
-                n -= (*iov)->iov_len;
-                (*iov)->iov_base = (char *) (*iov)->iov_base + (*iov)->iov_len;
-                (*iov)->iov_len = 0;
-                (*iov)++;
-                (*iov_size)--;
-                if (n == 0) {
-                    break;
-                }
-            }
-            if (*iov_size == 0) {
-                break;
-            }
-            (*iov)->iov_base = (char *) (*iov)->iov_base + n;
-            (*iov)->iov_len -= n;
-        }
-        /* Wait until the socket becomes writable */
-        if (st_netfd_poll(fd, POLLOUT, timeout) < 0) {
-            return -1;
-        }
-    }
-    
-    return 0;
-}
-
-/*
- * Simple I/O functions for UDP.
- */
-int st_recvfrom(_st_netfd_t *fd, void *buf, int len, struct sockaddr *from, int *fromlen, st_utime_t timeout)
-{
-    int n;
-    
-    while ((n = recvfrom(fd->osfd, buf, len, 0, from, (socklen_t *)fromlen)) < 0) {
-        if (errno == EINTR) {
-            continue;
-        }
-        if (!_IO_NOT_READY_ERROR) {
-            return -1;
-        }
-        /* Wait until the socket becomes readable */
-        if (st_netfd_poll(fd, POLLIN, timeout) < 0) {
-            return -1;
-        }
-    }
-    
-    return n;
-}
-
-int st_sendto(_st_netfd_t *fd, const void *msg, int len, const struct sockaddr *to, int tolen, st_utime_t timeout)
-{
-    int n;
-    
-    while ((n = sendto(fd->osfd, msg, len, 0, to, tolen)) < 0) {
-        if (errno == EINTR) {
-            continue;
-        }
-        if (!_IO_NOT_READY_ERROR) {
-            return -1;
-        }
-        /* Wait until the socket becomes writable */
-        if (st_netfd_poll(fd, POLLOUT, timeout) < 0) {
-            return -1;
-        }
-    }
-    
-    return n;
-}
-
-int st_recvmsg(_st_netfd_t *fd, struct msghdr *msg, int flags, st_utime_t timeout)
-{
-    int n;
-    
-    while ((n = recvmsg(fd->osfd, msg, flags)) < 0) {
-        if (errno == EINTR) {
-            continue;
-        }
-        if (!_IO_NOT_READY_ERROR) {
-            return -1;
-        }
-        /* Wait until the socket becomes readable */
-        if (st_netfd_poll(fd, POLLIN, timeout) < 0) {
-            return -1;
-        }
-    }
-    
-    return n;
-}
-
-int st_sendmsg(_st_netfd_t *fd, const struct msghdr *msg, int flags, st_utime_t timeout)
-{
-    int n;
-    
-    while ((n = sendmsg(fd->osfd, msg, flags)) < 0) {
-        if (errno == EINTR) {
-            continue;
-        }
-        if (!_IO_NOT_READY_ERROR) {
-            return -1;
-        }
-        /* Wait until the socket becomes writable */
-        if (st_netfd_poll(fd, POLLOUT, timeout) < 0) {
-            return -1;
-        }
-    }
-    
-    return n;
-}
-
-/*
- * To open FIFOs or other special files.
- */
-_st_netfd_t *st_open(const char *path, int oflags, mode_t mode)
-{
-    int osfd, err;
-    _st_netfd_t *newfd;
-    
-    while ((osfd = open(path, oflags | O_NONBLOCK, mode)) < 0) {
-        if (errno != EINTR) {
-            return NULL;
-        }
-    }
-    
-    newfd = _st_netfd_new(osfd, 0, 0);
-    if (!newfd) {
-        err = errno;
-        close(osfd);
-        errno = err;
-    }
-    
-    return newfd;
-}
-
diff --git a/trunk/research/st/key.c b/trunk/research/st/key.c
deleted file mode 100644
index 49d778a18..000000000
--- a/trunk/research/st/key.c
+++ /dev/null
@@ -1,116 +0,0 @@
-/* 
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- * 
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- * 
- * The Original Code is the Netscape Portable Runtime library.
- * 
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation.  Portions created by Netscape are 
- * Copyright (C) 1994-2000 Netscape Communications Corporation.  All
- * Rights Reserved.
- * 
- * Contributor(s):  Silicon Graphics, Inc.
- * 
- * Portions created by SGI are Copyright (C) 2000-2001 Silicon
- * Graphics, Inc.  All Rights Reserved.
- * 
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable 
- * instead of those above.  If you wish to allow use of your 
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL.  If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
-
-/*
- * This file is derived directly from Netscape Communications Corporation,
- * and consists of extensive modifications made during the year(s) 1999-2000.
- */
-
-#include 
-#include 
-#include "common.h"
-
-/*
- * Destructor table for per-thread private data
- */
-static _st_destructor_t _st_destructors[ST_KEYS_MAX];
-static int key_max = 0;
-
-/*
- * Return a key to be used for thread specific data
- */
-int st_key_create(int *keyp, _st_destructor_t destructor)
-{
-    if (key_max >= ST_KEYS_MAX) {
-        errno = EAGAIN;
-        return -1;
-    }
-    
-    *keyp = key_max++;
-    _st_destructors[*keyp] = destructor;
-    
-    return 0;
-}
-
-int st_key_getlimit(void)
-{
-    return ST_KEYS_MAX;
-}
-
-int st_thread_setspecific(int key, void *value)
-{
-    _st_thread_t *me = _ST_CURRENT_THREAD();
-    
-    if (key < 0 || key >= key_max) {
-        errno = EINVAL;
-        return -1;
-    }
-    
-    if (value != me->private_data[key]) {
-        /* free up previously set non-NULL data value */
-        if (me->private_data[key] && _st_destructors[key]) {
-            (*_st_destructors[key])(me->private_data[key]);
-        }
-        me->private_data[key] = value;
-    }
-    
-    return 0;
-}
-
-void *st_thread_getspecific(int key)
-{
-    if (key < 0 || key >= key_max) {
-        return NULL;
-    }
-    
-    return ((_ST_CURRENT_THREAD())->private_data[key]);
-}
-
-/*
- * Free up all per-thread private data
- */
-void _st_thread_cleanup(_st_thread_t *thread)
-{
-    int key;
-    
-    for (key = 0; key < key_max; key++) {
-        if (thread->private_data[key] && _st_destructors[key]) {
-            (*_st_destructors[key])(thread->private_data[key]);
-            thread->private_data[key] = NULL;
-        }
-    }
-}
-
diff --git a/trunk/research/st/md.S b/trunk/research/st/md.S
deleted file mode 100755
index 883da302b..000000000
--- a/trunk/research/st/md.S
+++ /dev/null
@@ -1,151 +0,0 @@
-/*
- * Portions created by SGI are Copyright (C) 2000 Silicon Graphics, Inc.
- * All Rights Reserved.
- */
-
-/****************************************************************/
-
-#if defined(__i386__)
-
-/*
- * Internal __jmp_buf layout
- */
-#define JB_BX  0
-#define JB_SI  1
-#define JB_DI  2
-#define JB_BP  3
-#define JB_SP  4
-#define JB_PC  5
-
-        .file "md.S"
-        .text
-
-        /* _st_md_cxt_save(__jmp_buf env) */
-.globl _st_md_cxt_save
-        .type _st_md_cxt_save, @function
-        .align 16
-_st_md_cxt_save:
-        movl 4(%esp), %eax
-
-        /*
-         * Save registers.
-         */
-        movl %ebx, (JB_BX*4)(%eax)
-        movl %esi, (JB_SI*4)(%eax)
-        movl %edi, (JB_DI*4)(%eax)
-        /* Save SP */
-        leal 4(%esp), %ecx
-        movl %ecx, (JB_SP*4)(%eax)
-        /* Save PC we are returning to */
-        movl 0(%esp), %ecx
-        movl %ecx, (JB_PC*4)(%eax)
-        /* Save caller frame pointer */
-        movl %ebp, (JB_BP*4)(%eax)
-        xorl %eax, %eax
-        ret
-        .size _st_md_cxt_save, .-_st_md_cxt_save
-
-
-/****************************************************************/
-
-        /* _st_md_cxt_restore(__jmp_buf env, int val) */
-.globl _st_md_cxt_restore
-        .type _st_md_cxt_restore, @function
-        .align 16
-_st_md_cxt_restore:
-        /* First argument is jmp_buf */
-        movl 4(%esp), %ecx
-        /* Second argument is return value */
-        movl 8(%esp), %eax
-        /* Set the return address */
-        movl (JB_PC*4)(%ecx), %edx
-        /*
-         * Restore registers.
-         */
-        movl (JB_BX*4)(%ecx), %ebx
-        movl (JB_SI*4)(%ecx), %esi
-        movl (JB_DI*4)(%ecx), %edi
-        movl (JB_BP*4)(%ecx), %ebp
-        movl (JB_SP*4)(%ecx), %esp
-        testl %eax, %eax
-        jnz  1f
-        incl %eax
-        /* Jump to saved PC */
-1:      jmp *%edx
-        .size _st_md_cxt_restore, .-_st_md_cxt_restore
-
-/****************************************************************/
-
-#elif defined(__amd64__) || defined(__x86_64__)
-
-/*
- * Internal __jmp_buf layout
- */
-#define JB_RBX  0
-#define JB_RBP  1
-#define JB_R12  2
-#define JB_R13  3
-#define JB_R14  4
-#define JB_R15  5
-#define JB_RSP  6
-#define JB_PC   7
-
-        .file "md.S"
-        .text
-
-        /* _st_md_cxt_save(__jmp_buf env) */
-.globl _st_md_cxt_save
-        .type _st_md_cxt_save, @function
-        .align 16
-_st_md_cxt_save:
-        /*
-         * Save registers.
-         */
-        movq %rbx, (JB_RBX*8)(%rdi)
-        movq %rbp, (JB_RBP*8)(%rdi)
-        movq %r12, (JB_R12*8)(%rdi)
-        movq %r13, (JB_R13*8)(%rdi)
-        movq %r14, (JB_R14*8)(%rdi)
-        movq %r15, (JB_R15*8)(%rdi)
-        /* Save SP */
-        leaq 8(%rsp), %rdx
-        movq %rdx, (JB_RSP*8)(%rdi)
-        /* Save PC we are returning to */
-        movq (%rsp), %rax
-        movq %rax, (JB_PC*8)(%rdi)
-        xorq %rax, %rax
-        ret
-        .size _st_md_cxt_save, .-_st_md_cxt_save
-
-
-/****************************************************************/
-
-        /* _st_md_cxt_restore(__jmp_buf env, int val) */
-.globl _st_md_cxt_restore
-        .type _st_md_cxt_restore, @function
-        .align 16
-_st_md_cxt_restore:
-        /*
-         * Restore registers.
-         */
-        movq (JB_RBX*8)(%rdi), %rbx
-        movq (JB_RBP*8)(%rdi), %rbp
-        movq (JB_R12*8)(%rdi), %r12
-        movq (JB_R13*8)(%rdi), %r13
-        movq (JB_R14*8)(%rdi), %r14
-        movq (JB_R15*8)(%rdi), %r15
-        /* Set return value */
-        test %esi, %esi
-        mov $01, %eax
-        cmove %eax, %esi
-        mov %esi, %eax
-        movq (JB_PC*8)(%rdi), %rdx
-        movq (JB_RSP*8)(%rdi), %rsp
-        /* Jump to saved PC */
-        jmpq *%rdx
-        .size _st_md_cxt_restore, .-_st_md_cxt_restore
-
-/****************************************************************/
-
-#endif
-
diff --git a/trunk/research/st/md.h b/trunk/research/st/md.h
deleted file mode 100644
index bf82f4d55..000000000
--- a/trunk/research/st/md.h
+++ /dev/null
@@ -1,193 +0,0 @@
-/* 
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- * 
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- * 
- * The Original Code is the Netscape Portable Runtime library.
- * 
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation.  Portions created by Netscape are 
- * Copyright (C) 1994-2000 Netscape Communications Corporation.  All
- * Rights Reserved.
- * 
- * Contributor(s):  Silicon Graphics, Inc.
- * 
- * Portions created by SGI are Copyright (C) 2000-2001 Silicon
- * Graphics, Inc.  All Rights Reserved.
- * 
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable 
- * instead of those above.  If you wish to allow use of your 
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL.  If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
-
-/*
- * This file is derived directly from Netscape Communications Corporation,
- * and consists of extensive modifications made during the year(s) 1999-2000.
- */
-
-#ifndef __ST_MD_H__
-#define __ST_MD_H__
-
-#if defined(ETIMEDOUT) && !defined(ETIME)
-    #define ETIME ETIMEDOUT
-#endif
-
-#if defined(MAP_ANONYMOUS) && !defined(MAP_ANON)
-    #define MAP_ANON MAP_ANONYMOUS
-#endif
-
-#ifndef MAP_FAILED
-    #define MAP_FAILED -1
-#endif
-
-/*****************************************
- * Platform specifics
- */
-#if defined (LINUX)
-    /* linux ok, defined bellow */
-#elif defined (AIX)
-    #error "AIX not supported"
-#elif defined (CYGWIN)
-    #error "CYGWIN not supported"
-#elif defined (DARWIN)
-    #error "DARWIN not supported"
-#elif defined (FREEBSD)
-    #error "FREEBSD not supported"
-#elif defined (HPUX)
-    #error "HPUX not supported"
-#elif defined (IRIX)
-    #error "IRIX not supported"
-#elif defined (NETBSD)
-    #error "NETBSD not supported"
-#elif defined (OPENBSD)
-    #error "OPENBSD not supported"
-#elif defined (OSF1)
-    #error "OSF1 not supported"
-#elif defined (SOLARIS)
-    #error "SOLARIS not supported"
-#else
-    #error "Unknown OS"
-#endif /* OS */
-
-/* linux only, defined bellow */
-/*
- * These are properties of the linux kernel and are the same on every
- * flavor and architecture.
- */
-#define MD_USE_BSD_ANON_MMAP
-#define MD_ACCEPT_NB_NOT_INHERITED
-#define MD_ALWAYS_UNSERIALIZED_ACCEPT
-/*
- * Modern GNU/Linux is Posix.1g compliant.
- */
-#define MD_HAVE_SOCKLEN_T
-
-/*
- * All architectures and flavors of linux have the gettimeofday
- * function but if you know of a faster way, use it.
- */
-#define MD_GET_UTIME()            \
-    struct timeval tv;              \
-    (void) gettimeofday(&tv, NULL); \
-    return (tv.tv_sec * 1000000LL + tv.tv_usec)
-
-#if defined(__mips__)
-    #define MD_STACK_GROWS_DOWN
-#else /* Not or mips */
-    /*
-     * On linux, there are a few styles of jmpbuf format.  These vary based
-     * on architecture/glibc combination.
-     *
-     * Most of the glibc based toggles were lifted from:
-     * mozilla/nsprpub/pr/include/md/_linux.h
-     */
-    /*
-     * Starting with glibc 2.4, JB_SP definitions are not public anymore.
-     * They, however, can still be found in glibc source tree in
-     * architecture-specific "jmpbuf-offsets.h" files.
-     * Most importantly, the content of jmp_buf is mangled by setjmp to make
-     * it completely opaque (the mangling can be disabled by setting the
-     * LD_POINTER_GUARD environment variable before application execution).
-     * Therefore we will use built-in _st_md_cxt_save/_st_md_cxt_restore
-     * functions as a setjmp/longjmp replacement wherever they are available
-     * unless USE_LIBC_SETJMP is defined.
-     */
-    #if defined(__i386__)
-        #define MD_STACK_GROWS_DOWN
-        #define MD_USE_BUILTIN_SETJMP
-        
-        #if defined(__GLIBC__) && __GLIBC__ >= 2
-            #ifndef JB_SP
-                #define JB_SP 4
-            #endif
-            #define MD_GET_SP(_t) (_t)->context[0].__jmpbuf[JB_SP]
-        #else
-            /* not an error but certainly cause for caution */
-            #error "Untested use of old glibc on i386"
-            #define MD_GET_SP(_t) (_t)->context[0].__jmpbuf[0].__sp
-        #endif
-    #elif defined(__amd64__) || defined(__x86_64__)
-        #define MD_STACK_GROWS_DOWN
-        #define MD_USE_BUILTIN_SETJMP
-        
-        #ifndef JB_RSP
-            #define JB_RSP 6
-        #endif
-        #define MD_GET_SP(_t) (_t)->context[0].__jmpbuf[JB_RSP]
-    #elif defined(__arm__)
-        #define MD_STACK_GROWS_DOWN
-        
-        #if defined(__GLIBC__) && __GLIBC__ >= 2
-            #define MD_GET_SP(_t) (_t)->context[0].__jmpbuf[8]
-        #else
-            #error "ARM/Linux pre-glibc2 not supported yet"
-        #endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
-    #else
-        #error "Unknown CPU architecture"
-    #endif /* Cases with common MD_INIT_CONTEXT and different SP locations */
-#endif /* Cases with different MD_INIT_CONTEXT */
-
-#if defined(MD_USE_BUILTIN_SETJMP) && !defined(USE_LIBC_SETJMP)
-    /* i386/x86_64 */
-    #define MD_SETJMP(env) _st_md_cxt_save(env)
-    #define MD_LONGJMP(env, val) _st_md_cxt_restore(env, val)
-    
-    extern int _st_md_cxt_save(jmp_buf env);
-    extern void _st_md_cxt_restore(jmp_buf env, int val);
-#else
-    /* arm/mips */
-    #define MD_SETJMP(env) setjmp(env)
-    #define MD_LONGJMP(env, val) longjmp(env, val)
-#endif
-
-/*****************************************
- * Other defines
- */
-#ifndef MD_STACK_PAD_SIZE
-    #define MD_STACK_PAD_SIZE 128
-#endif
-
-#if !defined(MD_HAVE_SOCKLEN_T) && !defined(socklen_t)
-    #define socklen_t int
-#endif
-
-#ifndef MD_CAP_STACK
-    #define MD_CAP_STACK(var_addr)
-#endif
-
-#endif /* !__ST_MD_H__ */
-
diff --git a/trunk/research/st/public.h b/trunk/research/st/public.h
deleted file mode 100644
index 3275191bc..000000000
--- a/trunk/research/st/public.h
+++ /dev/null
@@ -1,164 +0,0 @@
-/* 
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- * 
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- * 
- * The Original Code is the Netscape Portable Runtime library.
- * 
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation.  Portions created by Netscape are 
- * Copyright (C) 1994-2000 Netscape Communications Corporation.  All
- * Rights Reserved.
- * 
- * Contributor(s):  Silicon Graphics, Inc.
- * 
- * Portions created by SGI are Copyright (C) 2000-2001 Silicon
- * Graphics, Inc.  All Rights Reserved.
- * 
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable 
- * instead of those above.  If you wish to allow use of your 
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL.  If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
-
-#ifndef __ST_THREAD_H__
-#define __ST_THREAD_H__
-
-#include 
-#include 
-#include 
-#include 
-#include 
-#include 
-#include 
-
-#define ST_VERSION        "1.9"
-#define ST_VERSION_MAJOR    1
-#define ST_VERSION_MINOR    9
-
-/* Undefine this to remove the context switch callback feature. */
-#define ST_SWITCH_CB
-
-#ifndef ETIME
-    #define ETIME ETIMEDOUT
-#endif
-
-#ifndef ST_UTIME_NO_TIMEOUT
-    #define ST_UTIME_NO_TIMEOUT ((st_utime_t) -1LL)
-#endif
-
-#ifndef ST_UTIME_NO_WAIT
-    #define ST_UTIME_NO_WAIT 0
-#endif
-
-#define ST_EVENTSYS_DEFAULT 0
-#define ST_EVENTSYS_SELECT  1
-#define ST_EVENTSYS_POLL    2
-#define ST_EVENTSYS_ALT     3
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-    typedef unsigned long long  st_utime_t;
-    typedef struct _st_thread * st_thread_t;
-    typedef struct _st_cond *   st_cond_t;
-    typedef struct _st_mutex *  st_mutex_t;
-    typedef struct _st_netfd *  st_netfd_t;
-    #ifdef ST_SWITCH_CB
-    typedef void (*st_switch_cb_t)(void);
-    #endif
-    
-    extern int st_init(void);
-    extern int st_getfdlimit(void);
-    
-    extern int st_set_eventsys(int eventsys);
-    extern int st_get_eventsys(void);
-    extern const char *st_get_eventsys_name(void);
-    
-    #ifdef ST_SWITCH_CB
-    extern st_switch_cb_t st_set_switch_in_cb(st_switch_cb_t cb);
-    extern st_switch_cb_t st_set_switch_out_cb(st_switch_cb_t cb);
-    #endif
-    
-    extern st_thread_t st_thread_self(void);
-    extern void st_thread_exit(void *retval);
-    extern int st_thread_join(st_thread_t trd, void **retvalp);
-    extern void st_thread_interrupt(st_thread_t trd);
-    extern st_thread_t st_thread_create(void *(*start)(void *arg), void *arg, int joinable, int stack_size);
-    extern int st_randomize_stacks(int on);
-    extern int st_set_utime_function(st_utime_t (*func)(void));
-    
-    extern st_utime_t st_utime(void);
-    extern st_utime_t st_utime_last_clock(void);
-    extern int st_timecache_set(int on);
-    extern time_t st_time(void);
-    extern int st_usleep(st_utime_t usecs);
-    extern int st_sleep(int secs);
-    extern st_cond_t st_cond_new(void);
-    extern int st_cond_destroy(st_cond_t cvar);
-    extern int st_cond_timedwait(st_cond_t cvar, st_utime_t timeout);
-    extern int st_cond_wait(st_cond_t cvar);
-    extern int st_cond_signal(st_cond_t cvar);
-    extern int st_cond_broadcast(st_cond_t cvar);
-    extern st_mutex_t st_mutex_new(void);
-    extern int st_mutex_destroy(st_mutex_t lock);
-    extern int st_mutex_lock(st_mutex_t lock);
-    extern int st_mutex_unlock(st_mutex_t lock);
-    extern int st_mutex_trylock(st_mutex_t lock);
-    
-    extern int st_key_create(int *keyp, void (*destructor)(void *));
-    extern int st_key_getlimit(void);
-    extern int st_thread_setspecific(int key, void *value);
-    extern void *st_thread_getspecific(int key);
-    
-    extern st_netfd_t st_netfd_open(int osfd);
-    extern st_netfd_t st_netfd_open_socket(int osfd);
-    extern void st_netfd_free(st_netfd_t fd);
-    extern int st_netfd_close(st_netfd_t fd);
-    extern int st_netfd_fileno(st_netfd_t fd);
-    extern void st_netfd_setspecific(st_netfd_t fd, void *value, void (*destructor)(void *));
-    extern void *st_netfd_getspecific(st_netfd_t fd);
-    extern int st_netfd_serialize_accept(st_netfd_t fd);
-    extern int st_netfd_poll(st_netfd_t fd, int how, st_utime_t timeout);
-    
-    extern int st_poll(struct pollfd *pds, int npds, st_utime_t timeout);
-    extern st_netfd_t st_accept(st_netfd_t fd, struct sockaddr *addr, int *addrlen, st_utime_t timeout);
-    extern int st_connect(st_netfd_t fd, const struct sockaddr *addr, int addrlen, st_utime_t timeout);
-    extern ssize_t st_read(st_netfd_t fd, void *buf, size_t nbyte, st_utime_t timeout);
-    extern ssize_t st_read_fully(st_netfd_t fd, void *buf, size_t nbyte, st_utime_t timeout);
-    extern int st_read_resid(st_netfd_t fd, void *buf, size_t *resid, st_utime_t timeout);
-    extern ssize_t st_readv(st_netfd_t fd, const struct iovec *iov, int iov_size, st_utime_t timeout);
-    extern int st_readv_resid(st_netfd_t fd, struct iovec **iov, int *iov_size, st_utime_t timeout);
-    extern ssize_t st_write(st_netfd_t fd, const void *buf, size_t nbyte, st_utime_t timeout);
-    extern int st_write_resid(st_netfd_t fd, const void *buf, size_t *resid, st_utime_t timeout);
-    extern ssize_t st_writev(st_netfd_t fd, const struct iovec *iov, int iov_size, st_utime_t timeout);
-    extern int st_writev_resid(st_netfd_t fd, struct iovec **iov, int *iov_size, st_utime_t timeout);
-    extern int st_recvfrom(st_netfd_t fd, void *buf, int len, struct sockaddr *from, int *fromlen, st_utime_t timeout);
-    extern int st_sendto(st_netfd_t fd, const void *msg, int len, const struct sockaddr *to, int tolen, st_utime_t timeout);
-    extern int st_recvmsg(st_netfd_t fd, struct msghdr *msg, int flags, st_utime_t timeout);
-    extern int st_sendmsg(st_netfd_t fd, const struct msghdr *msg, int flags, st_utime_t timeout);
-    extern st_netfd_t st_open(const char *path, int oflags, mode_t mode);
-    
-    #ifdef DEBUG
-    extern void _st_show_thread_stack(st_thread_t thread, const char *messg);
-    extern void _st_iterate_threads(void);
-    #endif
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* !__ST_THREAD_H__ */
-
diff --git a/trunk/research/st/sched.c b/trunk/research/st/sched.c
deleted file mode 100755
index 66095cfd1..000000000
--- a/trunk/research/st/sched.c
+++ /dev/null
@@ -1,680 +0,0 @@
-/* 
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- * 
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- * 
- * The Original Code is the Netscape Portable Runtime library.
- * 
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation.  Portions created by Netscape are 
- * Copyright (C) 1994-2000 Netscape Communications Corporation.  All
- * Rights Reserved.
- * 
- * Contributor(s):  Silicon Graphics, Inc.
- * 
- * Portions created by SGI are Copyright (C) 2000-2001 Silicon
- * Graphics, Inc.  All Rights Reserved.
- * 
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable 
- * instead of those above.  If you wish to allow use of your 
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL.  If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
-
-/*
- * This file is derived directly from Netscape Communications Corporation,
- * and consists of extensive modifications made during the year(s) 1999-2000.
- */
-
-#include 
-#include 
-#include 
-#include 
-#include 
-#include 
-#include "common.h"
-
-/* Global data */
-_st_vp_t _st_this_vp;           /* This VP */
-_st_thread_t *_st_this_thread;  /* Current thread */
-int _st_active_count = 0;       /* Active thread count */
-
-time_t _st_curr_time = 0;       /* Current time as returned by time(2) */
-st_utime_t _st_last_tset;       /* Last time it was fetched */
-
-int st_poll(struct pollfd *pds, int npds, st_utime_t timeout)
-{
-    struct pollfd *pd;
-    struct pollfd *epd = pds + npds;
-    _st_pollq_t pq;
-    _st_thread_t *me = _ST_CURRENT_THREAD();
-    int n;
-    
-    if (me->flags & _ST_FL_INTERRUPT) {
-        me->flags &= ~_ST_FL_INTERRUPT;
-        errno = EINTR;
-        return -1;
-    }
-    
-    if ((*_st_eventsys->pollset_add)(pds, npds) < 0) {
-        return -1;
-    }
-    
-    pq.pds = pds;
-    pq.npds = npds;
-    pq.thread = me;
-    pq.on_ioq = 1;
-    _ST_ADD_IOQ(pq);
-    if (timeout != ST_UTIME_NO_TIMEOUT) {
-        _ST_ADD_SLEEPQ(me, timeout);
-    }
-    me->state = _ST_ST_IO_WAIT;
-    
-    _ST_SWITCH_CONTEXT(me);
-    
-    n = 0;
-    if (pq.on_ioq) {
-        /* If we timed out, the pollq might still be on the ioq. Remove it */
-        _ST_DEL_IOQ(pq);
-        (*_st_eventsys->pollset_del)(pds, npds);
-    } else {
-        /* Count the number of ready descriptors */
-        for (pd = pds; pd < epd; pd++) {
-            if (pd->revents) {
-                n++;
-            }
-        }
-    }
-    
-    if (me->flags & _ST_FL_INTERRUPT) {
-        me->flags &= ~_ST_FL_INTERRUPT;
-        errno = EINTR;
-        return -1;
-    }
-    
-    return n;
-}
-
-void _st_vp_schedule(void)
-{
-    _st_thread_t *trd;
-    
-    if (_ST_RUNQ.next != &_ST_RUNQ) {
-        /* Pull thread off of the run queue */
-        trd = _ST_THREAD_PTR(_ST_RUNQ.next);
-        _ST_DEL_RUNQ(trd);
-    } else {
-        /* If there are no threads to run, switch to the idle thread */
-        trd = _st_this_vp.idle_thread;
-    }
-    ST_ASSERT(trd->state == _ST_ST_RUNNABLE);
-    
-    /* Resume the thread */
-    trd->state = _ST_ST_RUNNING;
-    _ST_RESTORE_CONTEXT(trd);
-}
-
-/*
- * Initialize this Virtual Processor
- */
-int st_init(void)
-{
-    _st_thread_t *trd;
-    
-    if (_st_active_count) {
-        /* Already initialized */
-        return 0;
-    }
-    
-    /* We can ignore return value here */
-    st_set_eventsys(ST_EVENTSYS_DEFAULT);
-    
-    if (_st_io_init() < 0) {
-        return -1;
-    }
-    
-    memset(&_st_this_vp, 0, sizeof(_st_vp_t));
-    
-    ST_INIT_CLIST(&_ST_RUNQ);
-    ST_INIT_CLIST(&_ST_IOQ);
-    ST_INIT_CLIST(&_ST_ZOMBIEQ);
-#ifdef DEBUG
-    ST_INIT_CLIST(&_ST_THREADQ);
-#endif
-    
-    if ((*_st_eventsys->init)() < 0) {
-        return -1;
-    }
-    
-    _st_this_vp.pagesize = getpagesize();
-    _st_this_vp.last_clock = st_utime();
-    
-    /*
-    * Create idle thread
-    */
-    _st_this_vp.idle_thread = st_thread_create(_st_idle_thread_start, NULL, 0, 0);
-    if (!_st_this_vp.idle_thread) {
-        return -1;
-    }
-    _st_this_vp.idle_thread->flags = _ST_FL_IDLE_THREAD;
-    _st_active_count--;
-    _ST_DEL_RUNQ(_st_this_vp.idle_thread);
-    
-    /*
-    * Initialize primordial thread
-    */
-    trd = (_st_thread_t *) calloc(1, sizeof(_st_thread_t) +
-    (ST_KEYS_MAX * sizeof(void *)));
-    if (!trd) {
-        return -1;
-    }
-    trd->private_data = (void **) (trd + 1);
-    trd->state = _ST_ST_RUNNING;
-    trd->flags = _ST_FL_PRIMORDIAL;
-    _ST_SET_CURRENT_THREAD(trd);
-    _st_active_count++;
-#ifdef DEBUG
-    _ST_ADD_THREADQ(trd);
-#endif
-    
-    return 0;
-}
-
-#ifdef ST_SWITCH_CB
-st_switch_cb_t st_set_switch_in_cb(st_switch_cb_t cb)
-{
-    st_switch_cb_t ocb = _st_this_vp.switch_in_cb;
-    _st_this_vp.switch_in_cb = cb;
-    return ocb;
-}
-
-st_switch_cb_t st_set_switch_out_cb(st_switch_cb_t cb)
-{
-    st_switch_cb_t ocb = _st_this_vp.switch_out_cb;
-    _st_this_vp.switch_out_cb = cb;
-    return ocb;
-}
-#endif
-
-/*
- * Start function for the idle thread
- */
-/* ARGSUSED */
-void *_st_idle_thread_start(void *arg)
-{
-    _st_thread_t *me = _ST_CURRENT_THREAD();
-    
-    while (_st_active_count > 0) {
-        /* Idle vp till I/O is ready or the smallest timeout expired */
-        _ST_VP_IDLE();
-        
-        /* Check sleep queue for expired threads */
-        _st_vp_check_clock();
-        
-        me->state = _ST_ST_RUNNABLE;
-        _ST_SWITCH_CONTEXT(me);
-    }
-    
-    /* No more threads */
-    exit(0);
-    
-    /* NOTREACHED */
-    return NULL;
-}
-
-void st_thread_exit(void *retval)
-{
-    _st_thread_t *trd = _ST_CURRENT_THREAD();
-    
-    trd->retval = retval;
-    _st_thread_cleanup(trd);
-    _st_active_count--;
-    if (trd->term) {
-        /* Put thread on the zombie queue */
-        trd->state = _ST_ST_ZOMBIE;
-        _ST_ADD_ZOMBIEQ(trd);
-        
-        /* Notify on our termination condition variable */
-        st_cond_signal(trd->term);
-        
-        /* Switch context and come back later */
-        _ST_SWITCH_CONTEXT(trd);
-        
-        /* Continue the cleanup */
-        st_cond_destroy(trd->term);
-        trd->term = NULL;
-    }
-    
-#ifdef DEBUG
-    _ST_DEL_THREADQ(trd);
-#endif
-    
-    if (!(trd->flags & _ST_FL_PRIMORDIAL)) {
-        _st_stack_free(trd->stack);
-    }
-    
-    /* Find another thread to run */
-    _ST_SWITCH_CONTEXT(trd);
-    /* Not going to land here */
-}
-
-int st_thread_join(_st_thread_t *trd, void **retvalp)
-{
-    _st_cond_t *term = trd->term;
-    
-    /* Can't join a non-joinable thread */
-    if (term == NULL) {
-        errno = EINVAL;
-        return -1;
-    }
-    if (_ST_CURRENT_THREAD() == trd) {
-        errno = EDEADLK;
-        return -1;
-    }
-    
-    /* Multiple threads can't wait on the same joinable thread */
-    if (term->wait_q.next != &term->wait_q) {
-        errno = EINVAL;
-        return -1;
-    }
-    
-    while (trd->state != _ST_ST_ZOMBIE) {
-        if (st_cond_timedwait(term, ST_UTIME_NO_TIMEOUT) != 0) {
-            return -1;
-        }
-    }
-    
-    if (retvalp) {
-        *retvalp = trd->retval;
-    }
-    
-    /*
-    * Remove target thread from the zombie queue and make it runnable.
-    * When it gets scheduled later, it will do the clean up.
-    */
-    trd->state = _ST_ST_RUNNABLE;
-    _ST_DEL_ZOMBIEQ(trd);
-    _ST_ADD_RUNQ(trd);
-    
-    return 0;
-}
-
-void _st_thread_main(void)
-{
-    _st_thread_t *trd = _ST_CURRENT_THREAD();
-    
-    /*
-    * Cap the stack by zeroing out the saved return address register
-    * value. This allows some debugging/profiling tools to know when
-    * to stop unwinding the stack. It's a no-op on most platforms.
-    */
-    MD_CAP_STACK(&trd);
-    
-    /* Run thread main */
-    trd->retval = (*trd->start)(trd->arg);
-    
-    /* All done, time to go away */
-    st_thread_exit(trd->retval);
-}
-
-/*
- * Insert "thread" into the timeout heap, in the position
- * specified by thread->heap_index.  See docs/timeout_heap.txt
- * for details about the timeout heap.
- */
-static _st_thread_t **heap_insert(_st_thread_t *trd)
-{
-    int target = trd->heap_index;
-    int s = target;
-    _st_thread_t **p = &_ST_SLEEPQ;
-    int bits = 0;
-    int bit;
-    int index = 1;
-    
-    while (s) {
-        s >>= 1;
-        bits++;
-    }
-    
-    for (bit = bits - 2; bit >= 0; bit--) {
-        if (trd->due < (*p)->due) {
-            _st_thread_t *t = *p;
-            trd->left = t->left;
-            trd->right = t->right;
-            *p = trd;
-            trd->heap_index = index;
-            trd = t;
-        }
-        index <<= 1;
-        if (target & (1 << bit)) {
-            p = &((*p)->right);
-            index |= 1;
-        } else {
-            p = &((*p)->left);
-        }
-    }
-    
-    trd->heap_index = index;
-    *p = trd;
-    trd->left = trd->right = NULL;
-    
-    return p;
-}
-
-/*
- * Delete "thread" from the timeout heap.
- */
-static void heap_delete(_st_thread_t *trd) 
-{
-    _st_thread_t *t, **p;
-    int bits = 0;
-    int s, bit;
-    
-    /* First find and unlink the last heap element */
-    p = &_ST_SLEEPQ;
-    s = _ST_SLEEPQ_SIZE;
-    while (s) {
-        s >>= 1;
-        bits++;
-    }
-    
-    for (bit = bits - 2; bit >= 0; bit--) {
-        if (_ST_SLEEPQ_SIZE & (1 << bit)) {
-            p = &((*p)->right);
-        } else {
-            p = &((*p)->left);
-        }
-    }
-    
-    t = *p;
-    *p = NULL;
-    --_ST_SLEEPQ_SIZE;
-    if (t != trd) {
-        /*
-        * Insert the unlinked last element in place of the element we are deleting
-        */
-        t->heap_index = trd->heap_index;
-        p = heap_insert(t);
-        t = *p;
-        t->left = trd->left;
-        t->right = trd->right;
-        
-        /*
-        * Reestablish the heap invariant.
-        */
-        for (;;) {
-            _st_thread_t *y; /* The younger child */
-            int index_tmp;
-            
-            if (t->left == NULL) {
-                break;
-            } else if (t->right == NULL) {
-                y = t->left;
-            } else if (t->left->due < t->right->due) {
-                y = t->left;
-            } else {
-                y = t->right;
-            }
-            
-            if (t->due > y->due) {
-                _st_thread_t *tl = y->left;
-                _st_thread_t *tr = y->right;
-                *p = y;
-                if (y == t->left) {
-                    y->left = t;
-                    y->right = t->right;
-                    p = &y->left;
-                } else {
-                    y->left = t->left;
-                    y->right = t;
-                    p = &y->right;
-                }
-                t->left = tl;
-                t->right = tr;
-                index_tmp = t->heap_index;
-                t->heap_index = y->heap_index;
-                y->heap_index = index_tmp;
-            } else {
-                break;
-            }
-        }
-    }
-    
-    trd->left = trd->right = NULL;
-}
-
-void _st_add_sleep_q(_st_thread_t *trd, st_utime_t timeout)
-{
-    trd->due = _ST_LAST_CLOCK + timeout;
-    trd->flags |= _ST_FL_ON_SLEEPQ;
-    trd->heap_index = ++_ST_SLEEPQ_SIZE;
-    heap_insert(trd);
-}
-
-void _st_del_sleep_q(_st_thread_t *trd)
-{
-    heap_delete(trd);
-    trd->flags &= ~_ST_FL_ON_SLEEPQ;
-}
-
-void _st_vp_check_clock(void)
-{
-    _st_thread_t *trd;
-    st_utime_t elapsed, now;
-    
-    now = st_utime();
-    elapsed = now - _ST_LAST_CLOCK;
-    _ST_LAST_CLOCK = now;
-    
-    if (_st_curr_time && now - _st_last_tset > 999000) {
-        _st_curr_time = time(NULL);
-        _st_last_tset = now;
-    }
-    
-    while (_ST_SLEEPQ != NULL) {
-        trd = _ST_SLEEPQ;
-        ST_ASSERT(trd->flags & _ST_FL_ON_SLEEPQ);
-        if (trd->due > now) {
-            break;
-        }
-        _ST_DEL_SLEEPQ(trd);
-        
-        /* If thread is waiting on condition variable, set the time out flag */
-        if (trd->state == _ST_ST_COND_WAIT) {
-            trd->flags |= _ST_FL_TIMEDOUT;
-        }
-        
-        /* Make thread runnable */
-        ST_ASSERT(!(trd->flags & _ST_FL_IDLE_THREAD));
-        trd->state = _ST_ST_RUNNABLE;
-        _ST_ADD_RUNQ(trd);
-    }
-}
-
-void st_thread_interrupt(_st_thread_t* trd)
-{
-    /* If thread is already dead */
-    if (trd->state == _ST_ST_ZOMBIE) {
-        return;
-    }
-    
-    trd->flags |= _ST_FL_INTERRUPT;
-    
-    if (trd->state == _ST_ST_RUNNING || trd->state == _ST_ST_RUNNABLE) {
-        return;
-    }
-    
-    if (trd->flags & _ST_FL_ON_SLEEPQ) {
-        _ST_DEL_SLEEPQ(trd);
-    }
-    
-    /* Make thread runnable */
-    trd->state = _ST_ST_RUNNABLE;
-    _ST_ADD_RUNQ(trd);
-}
-
-_st_thread_t *st_thread_create(void *(*start)(void *arg), void *arg, int joinable, int stk_size)
-{
-    _st_thread_t *trd;
-    _st_stack_t *stack;
-    void **ptds;
-    char *sp;
-    
-    /* Adjust stack size */
-    if (stk_size == 0) {
-        stk_size = ST_DEFAULT_STACK_SIZE;
-    }
-    stk_size = ((stk_size + _ST_PAGE_SIZE - 1) / _ST_PAGE_SIZE) * _ST_PAGE_SIZE;
-    stack = _st_stack_new(stk_size);
-    if (!stack) {
-        return NULL;
-    }
-    
-    /* Allocate thread object and per-thread data off the stack */
-#if defined (MD_STACK_GROWS_DOWN)
-    sp = stack->stk_top;
-    /*
-    * The stack segment is split in the middle. The upper half is used
-    * as backing store for the register stack which grows upward.
-    * The lower half is used for the traditional memory stack which
-    * grows downward. Both stacks start in the middle and grow outward
-    * from each other.
-    */
-    /**
-    The below comments is by winlin:
-    The Stack public structure:
-        +--------------------------------------------------------------+
-        |                         stack                                |
-        +--------------------------------------------------------------+
-       bottom                                                         top
-    The code bellow use the stack as:
-        +-----------------+-----------------+-------------+------------+
-        | stack of thread |pad+align(128B+) |thread(336B) | keys(128B) |
-        +-----------------+-----------------+-------------+------------+
-       bottom            sp                trd           ptds         top
-               (context[0].__jmpbuf.sp)             (private_data)
-    */
-    sp = sp - (ST_KEYS_MAX * sizeof(void *));
-    ptds = (void **) sp;
-    sp = sp - sizeof(_st_thread_t);
-    trd = (_st_thread_t *) sp;
-    
-    /* Make stack 64-byte aligned */
-    if ((unsigned long)sp & 0x3f) {
-        sp = sp - ((unsigned long)sp & 0x3f);
-    }
-    stack->sp = sp - _ST_STACK_PAD_SIZE;
-#else
-    #error "Only Supports Stack Grown Down"
-#endif
-    
-    memset(trd, 0, sizeof(_st_thread_t));
-    memset(ptds, 0, ST_KEYS_MAX * sizeof(void *));
-    
-    /* Initialize thread */
-    trd->private_data = ptds;
-    trd->stack = stack;
-    trd->start = start;
-    trd->arg = arg;
-
-// by winlin, expand macro MD_INIT_CONTEXT
-#if defined(__mips__)
-    MD_SETJMP((trd)->context);
-    trd->context[0].__jmpbuf[0].__pc = (__ptr_t) _st_thread_main;
-    trd->context[0].__jmpbuf[0].__sp = stack->sp;
-#else
-    if (MD_SETJMP((trd)->context)) {
-        _st_thread_main();
-    }
-    MD_GET_SP(trd) = (long) (stack->sp);
-#endif
-    
-    /* If thread is joinable, allocate a termination condition variable */
-    if (joinable) {
-        trd->term = st_cond_new();
-        if (trd->term == NULL) {
-            _st_stack_free(trd->stack);
-            return NULL;
-        }
-    }
-    
-    /* Make thread runnable */
-    trd->state = _ST_ST_RUNNABLE;
-    _st_active_count++;
-    _ST_ADD_RUNQ(trd);
-#ifdef DEBUG
-    _ST_ADD_THREADQ(trd);
-#endif
-    
-    return trd;
-}
-
-_st_thread_t *st_thread_self(void)
-{
-    return _ST_CURRENT_THREAD();
-}
-
-#ifdef DEBUG
-/* ARGSUSED */
-void _st_show_thread_stack(_st_thread_t *trd, const char *messg)
-{
-}
-
-/* To be set from debugger */
-int _st_iterate_threads_flag = 0;
-
-void _st_iterate_threads(void)
-{
-    static _st_thread_t *trd = NULL;
-    static jmp_buf orig_jb, save_jb;
-    _st_clist_t *q;
-    
-    if (!_st_iterate_threads_flag) {
-        if (trd) {
-            memcpy(trd->context, save_jb, sizeof(jmp_buf));
-            MD_LONGJMP(orig_jb, 1);
-        }
-        return;
-    }
-    
-    if (trd) {
-        memcpy(trd->context, save_jb, sizeof(jmp_buf));
-        _st_show_thread_stack(trd, NULL);
-    } else {
-        if (MD_SETJMP(orig_jb)) {
-            _st_iterate_threads_flag = 0;
-            trd = NULL;
-            _st_show_thread_stack(trd, "Iteration completed");
-            return;
-        }
-        trd = _ST_CURRENT_THREAD();
-        _st_show_thread_stack(trd, "Iteration started");
-    }
-    
-    q = trd->tlink.next;
-    if (q == &_ST_THREADQ) {
-        q = q->next;
-    }
-    ST_ASSERT(q != &_ST_THREADQ);
-    trd = _ST_THREAD_THREADQ_PTR(q);
-    if (trd == _ST_CURRENT_THREAD()) {
-        MD_LONGJMP(orig_jb, 1);
-    }
-    memcpy(save_jb, trd->context, sizeof(jmp_buf));
-    MD_LONGJMP(trd->context, 1);
-}
-#endif /* DEBUG */
-
diff --git a/trunk/research/st/srs.c b/trunk/research/st/srs.c
deleted file mode 100644
index 09bc5eacc..000000000
--- a/trunk/research/st/srs.c
+++ /dev/null
@@ -1,497 +0,0 @@
-#include 
-#include 
-#include 
-
-#include 
-#include 
-#include 
-#include 
-#include 
-#include 
-#include 
-
-#include "public.h"
-
-#define srs_trace(msg, ...)   printf(msg, ##__VA_ARGS__);printf("\n")
-
-int io_port = 1990;
-int sleep_ms = 100;
-
-void stack_print(long int previous_sp, int level)
-{
-    if (level <= 0) {
-        return;
-    }
-    
-    register long int rsp asm("sp");
-    char buf[level * 1024];
-    
-    stack_print(rsp, level - 1);
-    
-    srs_trace("%d. psp=%#lx, sp=%#lx, size=%dB(%dB+%dKB)", 
-        level, previous_sp, rsp, (int)(previous_sp - rsp), 
-        (int)(previous_sp - rsp - sizeof(buf)), (int)(sizeof(buf) / 1024));
-}
-
-int huge_stack_test()
-{
-    srs_trace("===================================================");
-    srs_trace("huge_stack test: start");
-    
-    register long int rsp asm("sp");
-    stack_print(rsp, 10);
-    
-    srs_trace("huge_stack test: end");
-    
-    return 0;
-}
-
-int sleep_test()
-{
-    srs_trace("===================================================");
-    srs_trace("sleep test: start");
-    
-    srs_trace("1. sleep...");
-    st_utime_t start = st_utime();
-    st_usleep(sleep_ms * 1000);
-    st_utime_t end = st_utime();
-    
-    srs_trace("2. sleep ok, sleep=%dus, deviation=%dus", 
-        (int)(sleep_ms * 1000), (int)(end - start - sleep_ms * 1000));
-
-    srs_trace("sleep test: end");
-    
-    return 0;
-}
-
-void* sleep2_func0(void* arg)
-{
-    int sleep_ms = 100;
-    st_utime_t start = st_utime();
-    st_usleep(sleep_ms * 1000);
-    st_utime_t end = st_utime();
-    
-    srs_trace("sleep ok, sleep=%dus, deviation=%dus", 
-        (int)(sleep_ms * 1000), (int)(end - start - sleep_ms * 1000));
-        
-    return NULL;
-}
-
-void* sleep2_func1(void* arg)
-{
-    int sleep_ms = 250;
-    st_utime_t start = st_utime();
-    st_usleep(sleep_ms * 1000);
-    st_utime_t end = st_utime();
-    
-    srs_trace("sleep ok, sleep=%dus, deviation=%dus", 
-        (int)(sleep_ms * 1000), (int)(end - start - sleep_ms * 1000));
-        
-    return NULL;
-}
-
-int sleep2_test()
-{
-    srs_trace("===================================================");
-    srs_trace("sleep2 test: start");
-    
-    st_thread_t trd0 = st_thread_create(sleep2_func0, NULL, 1, 0);
-    st_thread_t trd1 = st_thread_create(sleep2_func1, NULL, 1, 0);
-    st_thread_join(trd0, NULL);
-    st_thread_join(trd1, NULL);
-
-    srs_trace("sleep test: end");
-    
-    return 0;
-}
-
-st_mutex_t sleep_work_cond = NULL;
-void* sleep_deviation_func(void* arg)
-{
-    st_mutex_lock(sleep_work_cond);
-    srs_trace("2. work thread start.");
-
-    int64_t i;
-    for (i = 0; i < 3000000000ULL; i++) {
-    }
-    
-    st_mutex_unlock(sleep_work_cond);
-    srs_trace("3. work thread end.");
-    
-    return NULL;
-}
-
-int sleep_deviation_test()
-{
-    srs_trace("===================================================");
-    srs_trace("sleep deviation test: start");
-    
-    sleep_work_cond = st_mutex_new();
-    
-    st_thread_create(sleep_deviation_func, NULL, 0, 0);
-    st_mutex_lock(sleep_work_cond);
-    
-    srs_trace("1. sleep...");
-    st_utime_t start = st_utime();
-    
-    // other thread to do some complex work.
-    st_mutex_unlock(sleep_work_cond);
-    st_usleep(1000 * 1000);
-    
-    st_utime_t end = st_utime();
-    
-    srs_trace("4. sleep ok, sleep=%dus, deviation=%dus", 
-        (int)(sleep_ms * 1000), (int)(end - start - sleep_ms * 1000));
-
-    st_mutex_lock(sleep_work_cond);
-    srs_trace("sleep deviation test: end");
-    
-    st_mutex_destroy(sleep_work_cond);
-    
-    return 0;
-}
-
-void* thread_func(void* arg)
-{
-    srs_trace("1. thread run");
-    st_usleep(sleep_ms * 1000);
-    srs_trace("2. thread completed");
-    return NULL;
-}
-
-int thread_test()
-{
-    srs_trace("===================================================");
-    srs_trace("thread test: start");
-    
-    st_thread_t trd = st_thread_create(thread_func, NULL, 1, 0);
-    if (trd == NULL) {
-        srs_trace("st_thread_create failed");
-        return -1;
-    }
-    
-    st_thread_join(trd, NULL);
-    srs_trace("3. thread joined");
-    
-    srs_trace("thread test: end");
-    
-    return 0;
-}
-
-st_mutex_t sync_start = NULL;
-st_cond_t sync_cond = NULL;
-st_mutex_t sync_mutex = NULL;
-st_cond_t sync_end = NULL;
-
-void* sync_master(void* arg)
-{
-    // wait for main to sync_start this thread.
-    st_mutex_lock(sync_start);
-    st_mutex_unlock(sync_start);
-    
-    st_usleep(sleep_ms * 1000);
-    st_cond_signal(sync_cond);
-    
-    st_mutex_lock(sync_mutex);
-    srs_trace("2. st mutex is ok");
-    st_mutex_unlock(sync_mutex);
-    
-    st_usleep(sleep_ms * 1000);
-    srs_trace("3. st thread is ok");
-    st_cond_signal(sync_cond);
-    
-    return NULL;
-}
-
-void* sync_slave(void* arg)
-{
-    // lock mutex to control thread.
-    st_mutex_lock(sync_mutex);
-    
-    // wait for main to sync_start this thread.
-    st_mutex_lock(sync_start);
-    st_mutex_unlock(sync_start);
-    
-    // wait thread to ready.
-    st_cond_wait(sync_cond);
-    srs_trace("1. st cond is ok");
-    
-    // release mutex to control thread
-    st_usleep(sleep_ms * 1000);
-    st_mutex_unlock(sync_mutex);
-    
-    // wait thread to exit.
-    st_cond_wait(sync_cond);
-    srs_trace("4. st is ok");
-    
-    st_cond_signal(sync_end);
-    
-    return NULL;
-}
-
-int sync_test()
-{
-    srs_trace("===================================================");
-    srs_trace("sync test: start");
-    
-    if ((sync_start = st_mutex_new()) == NULL) {
-        srs_trace("st_mutex_new sync_start failed");
-        return -1;
-    }
-    st_mutex_lock(sync_start);
-
-    if ((sync_cond = st_cond_new()) == NULL) {
-        srs_trace("st_cond_new cond failed");
-        return -1;
-    }
-
-    if ((sync_end = st_cond_new()) == NULL) {
-        srs_trace("st_cond_new end failed");
-        return -1;
-    }
-    
-    if ((sync_mutex = st_mutex_new()) == NULL) {
-        srs_trace("st_mutex_new mutex failed");
-        return -1;
-    }
-    
-    if (!st_thread_create(sync_master, NULL, 0, 0)) {
-        srs_trace("st_thread_create failed");
-        return -1;
-    }
-    
-    if (!st_thread_create(sync_slave, NULL, 0, 0)) {
-        srs_trace("st_thread_create failed");
-        return -1;
-    }
-    
-    // run all threads.
-    st_mutex_unlock(sync_start);
-    
-    st_cond_wait(sync_end);
-    srs_trace("sync test: end");
-    
-    return 0;
-}
-
-void* io_client(void* arg)
-{
-    
-    int fd;
-    if ((fd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
-        srs_trace("create linux socket error.");
-        return NULL;
-    }
-    srs_trace("6. client create linux socket success. fd=%d", fd);
-    
-    st_netfd_t stfd;
-    if ((stfd = st_netfd_open_socket(fd)) == NULL){
-        srs_trace("st_netfd_open_socket open socket failed.");
-        return NULL;
-    }
-    srs_trace("7. client st open socket success. fd=%d", fd);
-    
-    struct sockaddr_in addr;
-    addr.sin_family = AF_INET;
-    addr.sin_port = htons(io_port);
-    addr.sin_addr.s_addr = INADDR_ANY;
-    if (st_connect(stfd, (const struct sockaddr*)&addr, sizeof(struct sockaddr_in), ST_UTIME_NO_TIMEOUT) == -1) {
-        srs_trace("bind socket error.");
-        return NULL;
-    }
-    
-    char buf[1024];
-    if (st_read_fully(stfd, buf, sizeof(buf), ST_UTIME_NO_TIMEOUT) != sizeof(buf)) {
-        srs_trace("st_read_fully failed");
-        return NULL;
-    }
-    if (st_write(stfd, buf, sizeof(buf), ST_UTIME_NO_TIMEOUT) != sizeof(buf)) {
-        srs_trace("st_write failed");
-        return NULL;
-    }
-    
-    st_netfd_close(stfd);
-    
-    return NULL;
-}
-
-int io_test()
-{
-    srs_trace("===================================================");
-    srs_trace("io test: start, port=%d", io_port);
-    
-    int fd;
-    if ((fd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
-        srs_trace("create linux socket error.");
-        return -1;
-    }
-    srs_trace("1. server create linux socket success. fd=%d", fd);
-    
-    int reuse_socket = 1;
-    if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuse_socket, sizeof(int)) == -1) {
-        srs_trace("setsockopt reuse-addr error.");
-        return -1;
-    }
-    srs_trace("2. server setsockopt reuse-addr success. fd=%d", fd);
-    
-    struct sockaddr_in addr;
-    addr.sin_family = AF_INET;
-    addr.sin_port = htons(io_port);
-    addr.sin_addr.s_addr = INADDR_ANY;
-    if (bind(fd, (const struct sockaddr*)&addr, sizeof(struct sockaddr_in)) == -1) {
-        srs_trace("bind socket error.");
-        return -1;
-    }
-    srs_trace("3. server bind socket success. fd=%d", fd);
-    
-    if (listen(fd, 10) == -1) {
-        srs_trace("listen socket error.");
-        return -1;
-    }
-    srs_trace("4. server listen socket success. fd=%d", fd);
-    
-    st_netfd_t stfd;
-    if ((stfd = st_netfd_open_socket(fd)) == NULL){
-        srs_trace("st_netfd_open_socket open socket failed.");
-        return -1;
-    }
-    srs_trace("5. server st open socket success. fd=%d", fd);
-    
-    if (!st_thread_create(io_client, NULL, 0, 0)) {
-        srs_trace("st_thread_create failed");
-        return -1;
-    }
-    
-    st_netfd_t client_stfd = st_accept(stfd, NULL, NULL, ST_UTIME_NO_TIMEOUT);
-    srs_trace("8. server get a client. fd=%d", st_netfd_fileno(client_stfd));
-    
-    char buf[1024];
-    if (st_write(client_stfd, buf, sizeof(buf), ST_UTIME_NO_TIMEOUT) != sizeof(buf)) {
-        srs_trace("st_write failed");
-        return -1;
-    }
-    if (st_read_fully(client_stfd, buf, sizeof(buf), ST_UTIME_NO_TIMEOUT) != sizeof(buf)) {
-        srs_trace("st_read_fully failed");
-        return -1;
-    }
-    srs_trace("9. server io completed.");
-    
-    st_netfd_close(stfd);
-    st_netfd_close(client_stfd);
-    
-    srs_trace("io test: end");
-    return 0;
-}
-
-int pipe_test()
-{
-    srs_trace("===================================================");
-    srs_trace("pipe test: start");
-    
-    int fds[2];
-    if (pipe(fds) < 0) {
-        srs_trace("pipe failed");
-        return -1;
-    }
-    srs_trace("1. pipe ok, %d=>%d", fds[1], fds[0]);
-    
-    st_netfd_t fdw;
-    if ((fdw = st_netfd_open_socket(fds[1])) == NULL) {
-        srs_trace("st_netfd_open_socket open socket failed.");
-        return -1;
-    }
-    srs_trace("2. open write fd ok");
-    
-    st_netfd_t fdr;
-    if ((fdr = st_netfd_open_socket(fds[0])) == NULL) {
-        srs_trace("st_netfd_open_socket open socket failed.");
-        return -1;
-    }
-    srs_trace("3. open read fd ok");
-    
-    char buf[1024];
-    if (st_write(fdw, buf, sizeof(buf), ST_UTIME_NO_TIMEOUT) < 0) {
-        srs_trace("st_write socket failed.");
-        return -1;
-    }
-    srs_trace("4. write to pipe ok");
-    
-    if (st_read(fdr, buf, sizeof(buf), ST_UTIME_NO_TIMEOUT) < 0) {
-        srs_trace("st_read socket failed.");
-        return -1;
-    }
-    srs_trace("5. read from pipe ok");
-    
-    st_netfd_close(fdw);
-    st_netfd_close(fdr);
-    
-    srs_trace("pipe test: end");
-    return 0;
-}
-
-int main(int argc, char** argv)
-{
-    srs_trace("ETIME=%d", ETIME);
-    
-    if (st_set_eventsys(ST_EVENTSYS_ALT) < 0) {
-        srs_trace("st_set_eventsys failed");
-        return -1;
-    }
-    
-    if (st_init() < 0) {
-        srs_trace("st_init failed");
-        return -1;
-    }
-    
-    if (sleep2_test() < 0) {
-        srs_trace("sleep2_test failed");
-        return -1;
-    }
-    
-    if (sleep_test() < 0) {
-        srs_trace("sleep_test failed");
-        return -1;
-    }
-    
-    if (sleep_deviation_test() < 0) {
-        srs_trace("sleep_deviation_test failed");
-        return -1;
-    }
-    
-    if (huge_stack_test() < 0) {
-        srs_trace("huge_stack_test failed");
-        return -1;
-    }
-    
-    if (thread_test() < 0) {
-        srs_trace("thread_test failed");
-        return -1;
-    }
-    
-    if (sync_test() < 0) {
-        srs_trace("sync_test failed");
-        return -1;
-    }
-    
-    if (io_test() < 0) {
-        srs_trace("io_test failed");
-        return -1;
-    }
-    
-    if (pipe_test() < 0) {
-        srs_trace("pipe_test failed");
-        return -1;
-    }
-    
-    // cleanup.
-    srs_trace("wait for all thread completed");
-    st_thread_exit(NULL);
-    // the following never enter, 
-    // the above code will exit when all thread exit,
-    // current is a primordial st-thread, when all thread exit,
-    // the st idle thread will exit(0), see _st_idle_thread_start()
-    srs_trace("all thread completed");
-    
-    return 0;
-}
-
diff --git a/trunk/research/st/st/init b/trunk/research/st/st/init
deleted file mode 100644
index 61604b75f..000000000
--- a/trunk/research/st/st/init
+++ /dev/null
@@ -1,3 +0,0 @@
-#ifndef _st_icpp_init_stub
-#define _st_icpp_init_stub
-#endif
diff --git a/trunk/research/st/st/st.upp b/trunk/research/st/st/st.upp
deleted file mode 100755
index dab6d4958..000000000
--- a/trunk/research/st/st/st.upp
+++ /dev/null
@@ -1,18 +0,0 @@
-file
-	main readonly separator,
-	..\srs.c,
-	st readonly separator,
-	..\common.h,
-	..\event.c,
-	..\io.c,
-	..\key.c,
-	..\md.h,
-	..\md.S,
-	..\public.h,
-	..\sched.c,
-	..\stk.c,
-	..\sync.c;
-
-mainconfig
-	"" = "MAIN";
-
diff --git a/trunk/research/st/stk.c b/trunk/research/st/stk.c
deleted file mode 100644
index c26223ba5..000000000
--- a/trunk/research/st/stk.c
+++ /dev/null
@@ -1,169 +0,0 @@
-/* 
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- * 
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- * 
- * The Original Code is the Netscape Portable Runtime library.
- * 
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation.  Portions created by Netscape are 
- * Copyright (C) 1994-2000 Netscape Communications Corporation.  All
- * Rights Reserved.
- * 
- * Contributor(s):  Silicon Graphics, Inc.
- * 
- * Portions created by SGI are Copyright (C) 2000-2001 Silicon
- * Graphics, Inc.  All Rights Reserved.
- * 
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable 
- * instead of those above.  If you wish to allow use of your 
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL.  If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
-
-/*
- * This file is derived directly from Netscape Communications Corporation,
- * and consists of extensive modifications made during the year(s) 1999-2000.
- */
-
-#include 
-#include 
-#include 
-#include 
-#include 
-#include "common.h"
-
-/* How much space to leave between the stacks, at each end */
-#define REDZONE    _ST_PAGE_SIZE
-
-_st_clist_t _st_free_stacks = ST_INIT_STATIC_CLIST(&_st_free_stacks);
-int _st_num_free_stacks = 0;
-int _st_randomize_stacks = 0;
-
-static char *_st_new_stk_segment(int size);
-
-/**
-The below comments is by winlin:
-The stack memory struct:
-    | REDZONE |          stack         |  extra  | REDZONE |
-    +---------+------------------------+---------+---------+
-    |    4k   |                        |   4k/0  |    4k   |
-    +---------+------------------------+---------+---------+
-    vaddr     bottom                   top
-When _st_randomize_stacks is on, by st_randomize_stacks(),
-the bottom and top will random movided in the extra:
-        long offset = (random() % extra) & ~0xf;
-        ts->stk_bottom += offset;
-        ts->stk_top += offset;
-Both REDZONE are protected by mprotect when DEBUG is on.
-*/
-_st_stack_t *_st_stack_new(int stack_size)
-{
-    _st_clist_t *qp;
-    _st_stack_t *ts;
-    int extra;
-    
-    // TODO: WINLIN: remove the stack reuse.
-    for (qp = _st_free_stacks.next; qp != &_st_free_stacks; qp = qp->next) {
-        ts = _ST_THREAD_STACK_PTR(qp);
-        if (ts->stk_size >= stack_size) {
-            /* Found a stack that is big enough */
-            ST_REMOVE_LINK(&ts->links);
-            _st_num_free_stacks--;
-            ts->links.next = NULL;
-            ts->links.prev = NULL;
-            return ts;
-        }
-    }
-    
-    /* Make a new thread stack object. */
-    if ((ts = (_st_stack_t *)calloc(1, sizeof(_st_stack_t))) == NULL) {
-        return NULL;
-    }
-    extra = _st_randomize_stacks ? _ST_PAGE_SIZE : 0;
-    ts->vaddr_size = stack_size + 2*REDZONE + extra;
-    ts->vaddr = _st_new_stk_segment(ts->vaddr_size);
-    if (!ts->vaddr) {
-        free(ts);
-        return NULL;
-    }
-    ts->stk_size = stack_size;
-    ts->stk_bottom = ts->vaddr + REDZONE;
-    ts->stk_top = ts->stk_bottom + stack_size;
-    
-#ifdef DEBUG
-    mprotect(ts->vaddr, REDZONE, PROT_NONE);
-    mprotect(ts->stk_top + extra, REDZONE, PROT_NONE);
-#endif
-    
-    if (extra) {
-        long offset = (random() % extra) & ~0xf;
-        
-        ts->stk_bottom += offset;
-        ts->stk_top += offset;
-    }
-    
-    return ts;
-}
-
-/*
- * Free the stack for the current thread
- */
-void _st_stack_free(_st_stack_t *ts)
-{
-    if (!ts) {
-        return;
-    }
-    
-    /* Put the stack on the free list */
-    ST_APPEND_LINK(&ts->links, _st_free_stacks.prev);
-    _st_num_free_stacks++;
-}
-
-static char *_st_new_stk_segment(int size)
-{
-#ifdef MALLOC_STACK
-    void *vaddr = malloc(size);
-#else
-    #error "Only Supports Malloc Stack"
-#endif
-    
-    return (char *)vaddr;
-}
-
-/* Not used */
-#if 0
-void _st_delete_stk_segment(char *vaddr, int size)
-{
-#ifdef MALLOC_STACK
-    free(vaddr);
-#else
-    #error Unknown Stack Malloc
-#endif
-}
-#endif
-
-int st_randomize_stacks(int on)
-{
-    int wason = _st_randomize_stacks;
-    
-    _st_randomize_stacks = on;
-    if (on) {
-        srandom((unsigned int) st_utime());
-    }
-    
-    return wason;
-}
diff --git a/trunk/research/st/sync.c b/trunk/research/st/sync.c
deleted file mode 100644
index 3e5324084..000000000
--- a/trunk/research/st/sync.c
+++ /dev/null
@@ -1,352 +0,0 @@
-/* 
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- * 
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- * 
- * The Original Code is the Netscape Portable Runtime library.
- * 
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation.  Portions created by Netscape are 
- * Copyright (C) 1994-2000 Netscape Communications Corporation.  All
- * Rights Reserved.
- * 
- * Contributor(s):  Silicon Graphics, Inc.
- * 
- * Portions created by SGI are Copyright (C) 2000-2001 Silicon
- * Graphics, Inc.  All Rights Reserved.
- * 
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable 
- * instead of those above.  If you wish to allow use of your 
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL.  If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
-
-/*
- * This file is derived directly from Netscape Communications Corporation,
- * and consists of extensive modifications made during the year(s) 1999-2000.
- */
-
-#include 
-#include 
-#include 
-#include "common.h"
-
-extern time_t _st_curr_time;
-extern st_utime_t _st_last_tset;
-extern int _st_active_count;
-
-static st_utime_t (*_st_utime)(void) = NULL;
-
-/*****************************************
- * Time functions
- */
-
-st_utime_t st_utime(void)
-{
-    if (_st_utime == NULL) {
-#ifdef MD_GET_UTIME
-        MD_GET_UTIME();
-#else
-        #error Unknown OS
-#endif
-    }
-    
-    return (*_st_utime)();
-}
-
-int st_set_utime_function(st_utime_t (*func)(void))
-{
-    if (_st_active_count) {
-        errno = EINVAL;
-        return -1;
-    }
-    
-    _st_utime = func;
-    
-    return 0;
-}
-
-st_utime_t st_utime_last_clock(void)
-{
-    return _ST_LAST_CLOCK;
-}
-
-int st_timecache_set(int on)
-{
-    int wason = (_st_curr_time) ? 1 : 0;
-    
-    if (on) {
-        _st_curr_time = time(NULL);
-        _st_last_tset = st_utime();
-    } else {
-        _st_curr_time = 0;
-    }
-    
-    return wason;
-}
-
-time_t st_time(void)
-{
-    if (_st_curr_time) {
-        return _st_curr_time;
-    }
-    
-    return time(NULL);
-}
-
-int st_usleep(st_utime_t usecs)
-{
-    _st_thread_t *me = _ST_CURRENT_THREAD();
-    
-    if (me->flags & _ST_FL_INTERRUPT) {
-        me->flags &= ~_ST_FL_INTERRUPT;
-        errno = EINTR;
-        return -1;
-    }
-    
-    if (usecs != ST_UTIME_NO_TIMEOUT) {
-        me->state = _ST_ST_SLEEPING;
-        _ST_ADD_SLEEPQ(me, usecs);
-    } else {
-        me->state = _ST_ST_SUSPENDED;
-    }
-    
-    _ST_SWITCH_CONTEXT(me);
-    
-    if (me->flags & _ST_FL_INTERRUPT) {
-        me->flags &= ~_ST_FL_INTERRUPT;
-        errno = EINTR;
-        return -1;
-    }
-    
-    return 0;
-}
-
-int st_sleep(int secs)
-{
-    return st_usleep((secs >= 0) ? secs * (st_utime_t) 1000000LL : ST_UTIME_NO_TIMEOUT);
-}
-
-/*****************************************
- * Condition variable functions
- */
-_st_cond_t *st_cond_new(void)
-{
-    _st_cond_t *cvar;
-    
-    cvar = (_st_cond_t *) calloc(1, sizeof(_st_cond_t));
-    if (cvar) {
-        ST_INIT_CLIST(&cvar->wait_q);
-    }
-    
-    return cvar;
-}
-
-int st_cond_destroy(_st_cond_t *cvar)
-{
-    if (cvar->wait_q.next != &cvar->wait_q) {
-        errno = EBUSY;
-        return -1;
-    }
-    
-    free(cvar);
-    
-    return 0;
-}
-
-int st_cond_timedwait(_st_cond_t *cvar, st_utime_t timeout)
-{
-    _st_thread_t *me = _ST_CURRENT_THREAD();
-    int rv;
-    
-    if (me->flags & _ST_FL_INTERRUPT) {
-        me->flags &= ~_ST_FL_INTERRUPT;
-        errno = EINTR;
-        return -1;
-    }
-    
-    /* Put caller thread on the condition variable's wait queue */
-    me->state = _ST_ST_COND_WAIT;
-    ST_APPEND_LINK(&me->wait_links, &cvar->wait_q);
-    
-    if (timeout != ST_UTIME_NO_TIMEOUT) {
-        _ST_ADD_SLEEPQ(me, timeout);
-    }
-    
-    _ST_SWITCH_CONTEXT(me);
-    
-    ST_REMOVE_LINK(&me->wait_links);
-    rv = 0;
-    
-    if (me->flags & _ST_FL_TIMEDOUT) {
-        me->flags &= ~_ST_FL_TIMEDOUT;
-        errno = ETIME;
-        rv = -1;
-    }
-    if (me->flags & _ST_FL_INTERRUPT) {
-        me->flags &= ~_ST_FL_INTERRUPT;
-        errno = EINTR;
-        rv = -1;
-    }
-    
-    return rv;
-}
-
-int st_cond_wait(_st_cond_t *cvar)
-{
-    return st_cond_timedwait(cvar, ST_UTIME_NO_TIMEOUT);
-}
-
-static int _st_cond_signal(_st_cond_t *cvar, int broadcast)
-{
-    _st_thread_t *thread;
-    _st_clist_t *q;
-    
-    for (q = cvar->wait_q.next; q != &cvar->wait_q; q = q->next) {
-        thread = _ST_THREAD_WAITQ_PTR(q);
-        if (thread->state == _ST_ST_COND_WAIT) {
-            if (thread->flags & _ST_FL_ON_SLEEPQ) {
-                _ST_DEL_SLEEPQ(thread);
-            }
-            
-            /* Make thread runnable */
-            thread->state = _ST_ST_RUNNABLE;
-            _ST_ADD_RUNQ(thread);
-            if (!broadcast) {
-                break;
-            }
-        }
-    }
-    
-    return 0;
-}
-
-int st_cond_signal(_st_cond_t *cvar)
-{
-    return _st_cond_signal(cvar, 0);
-}
-
-int st_cond_broadcast(_st_cond_t *cvar)
-{
-    return _st_cond_signal(cvar, 1);
-}
-
-/*****************************************
- * Mutex functions
- */
-_st_mutex_t *st_mutex_new(void)
-{
-    _st_mutex_t *lock;
-    
-    lock = (_st_mutex_t *) calloc(1, sizeof(_st_mutex_t));
-    if (lock) {
-        ST_INIT_CLIST(&lock->wait_q);
-        lock->owner = NULL;
-    }
-    
-    return lock;
-}
-
-int st_mutex_destroy(_st_mutex_t *lock)
-{
-    if (lock->owner != NULL || lock->wait_q.next != &lock->wait_q) {
-        errno = EBUSY;
-        return -1;
-    }
-    
-    free(lock);
-    
-    return 0;
-}
-
-int st_mutex_lock(_st_mutex_t *lock)
-{
-    _st_thread_t *me = _ST_CURRENT_THREAD();
-    
-    if (me->flags & _ST_FL_INTERRUPT) {
-        me->flags &= ~_ST_FL_INTERRUPT;
-        errno = EINTR;
-        return -1;
-    }
-    
-    if (lock->owner == NULL) {
-        /* Got the mutex */
-        lock->owner = me;
-        return 0;
-    }
-    
-    if (lock->owner == me) {
-        errno = EDEADLK;
-        return -1;
-    }
-    
-    /* Put caller thread on the mutex's wait queue */
-    me->state = _ST_ST_LOCK_WAIT;
-    ST_APPEND_LINK(&me->wait_links, &lock->wait_q);
-    
-    _ST_SWITCH_CONTEXT(me);
-    
-    ST_REMOVE_LINK(&me->wait_links);
-    
-    if ((me->flags & _ST_FL_INTERRUPT) && lock->owner != me) {
-        me->flags &= ~_ST_FL_INTERRUPT;
-        errno = EINTR;
-        return -1;
-    }
-    
-    return 0;
-}
-
-int st_mutex_unlock(_st_mutex_t *lock)
-{
-    _st_thread_t *thread;
-    _st_clist_t *q;
-    
-    if (lock->owner != _ST_CURRENT_THREAD()) {
-        errno = EPERM;
-        return -1;
-    }
-    
-    for (q = lock->wait_q.next; q != &lock->wait_q; q = q->next) {
-        thread = _ST_THREAD_WAITQ_PTR(q);
-        if (thread->state == _ST_ST_LOCK_WAIT) {
-            lock->owner = thread;
-            /* Make thread runnable */
-            thread->state = _ST_ST_RUNNABLE;
-            _ST_ADD_RUNQ(thread);
-            return 0;
-        }
-    }
-    
-    /* No threads waiting on this mutex */
-    lock->owner = NULL;
-    
-    return 0;
-}
-
-int st_mutex_trylock(_st_mutex_t *lock)
-{
-    if (lock->owner != NULL) {
-        errno = EBUSY;
-        return -1;
-    }
-    
-    /* Got the mutex */
-    lock->owner = _ST_CURRENT_THREAD();
-    
-    return 0;
-}
-
diff --git a/trunk/src/app/srs_app_config.cpp b/trunk/src/app/srs_app_config.cpp
index 2a8454633..01db3abc0 100644
--- a/trunk/src/app/srs_app_config.cpp
+++ b/trunk/src/app/srs_app_config.cpp
@@ -2195,8 +2195,34 @@ srs_error_t SrsConfig::global_to_json(SrsJsonObject* obj)
                     sobj->set(sdir->name, sdir->dumps_arg0_to_str());
                 } else if (sdir->name == "auto_create_channel") {
                     sobj->set(sdir->name, sdir->dumps_arg0_to_str());
-                }
-            }
+                } else if (sdir->name == "sip"){
+                    SrsJsonObject* ssobj = SrsJsonAny::object();
+                    sobj->set(sdir->name, ssobj);
+                    
+                    for (int j = 0; j < (int)sdir->directives.size(); j++) {
+                        SrsConfDirective* ssdir = sdir->directives.at(j);
+                        if (ssdir->name == "enabled") {
+                            ssobj->set(ssdir->name, ssdir->dumps_arg0_to_boolean());
+                        } else if (ssdir->name == "listen") {
+                            ssobj->set(ssdir->name, ssdir->dumps_arg0_to_integer());
+                        } else if (ssdir->name == "serial") {
+                            ssobj->set(ssdir->name, ssdir->dumps_arg0_to_str());
+                        } else if (ssdir->name == "realm") {
+                            ssobj->set(ssdir->name, ssdir->dumps_arg0_to_str());
+                        } else if (ssdir->name == "ack_timeout") {
+                            ssobj->set(ssdir->name, ssdir->dumps_arg0_to_integer());
+                        } else if (ssdir->name == "keepalive_timeout") {
+                            ssobj->set(ssdir->name, ssdir->dumps_arg0_to_integer());
+                        } else if (ssdir->name == "auto_play") {
+                            ssobj->set(ssdir->name, ssdir->dumps_arg0_to_boolean());
+                        } else if (ssdir->name == "invite_port_fixed") {
+                            ssobj->set(ssdir->name, ssdir->dumps_arg0_to_boolean());
+                        } else if (ssdir->name == "query_catalog_interval") {
+                            ssobj->set(ssdir->name, ssdir->dumps_arg0_to_integer());
+                        }
+                    }
+                }//end if
+            }//end for
             obj->set(dir->name, sobj);
         } else {
             continue;
@@ -3730,7 +3756,8 @@ srs_error_t SrsConfig::check_normal_config()
                 for (int j = 0; j < (int)conf->directives.size(); j++) {
                     string m = conf->at(j)->name;
                     if (m != "enabled"  && m != "listen" && m != "ack_timeout" && m != "keepalive_timeout"
-                        && m != "host" && m != "serial" && m != "realm" && m != "auto_play" && m != "invite_port_fixed") {
+                        && m != "host" && m != "serial" && m != "realm" && m != "auto_play" && m != "invite_port_fixed"
+                        && m != "query_catalog_interval") {
                         return srs_error_new(ERROR_SYSTEM_CONFIG_INVALID, "illegal stream_caster.%s", m.c_str());
                     }
                 }
@@ -4630,6 +4657,28 @@ bool SrsConfig::get_stream_caster_gb28181_auto_create_channel(SrsConfDirective*
     return SRS_CONF_PERFER_FALSE(conf->arg0());
 }
 
+srs_utime_t SrsConfig::get_stream_caster_gb28181_sip_query_catalog_interval(SrsConfDirective* conf)
+{
+    static srs_utime_t DEFAULT = 60 * SRS_UTIME_SECONDS;
+
+
+    if (!conf) {
+        return DEFAULT;
+    }
+
+    conf = conf->get("sip");
+    if (!conf) {
+        return DEFAULT;
+    }
+
+    conf = conf->get("query_catalog_interval");
+    if (!conf || conf->arg0().empty()) {
+        return DEFAULT;
+    }
+
+    return (srs_utime_t)(::atoi(conf->arg0().c_str()) * SRS_UTIME_SECONDS);
+}
+
 int SrsConfig::get_rtc_server_enabled()
 {
     SrsConfDirective* conf = root->get("rtc_server");
@@ -4747,7 +4796,8 @@ int SrsConfig::get_rtc_server_sendmmsg()
         return DEFAULT;
     }
 
-    return ::atoi(conf->arg0().c_str());
+    int v = ::atoi(conf->arg0().c_str());
+    return srs_max(1, v);
 #endif
 }
 
diff --git a/trunk/src/app/srs_app_config.hpp b/trunk/src/app/srs_app_config.hpp
index a905949b1..04552c3be 100644
--- a/trunk/src/app/srs_app_config.hpp
+++ b/trunk/src/app/srs_app_config.hpp
@@ -517,6 +517,7 @@ public:
     virtual int get_stream_caster_gb28181_sip_listen(SrsConfDirective* conf);
     virtual bool get_stream_caster_gb28181_sip_invite_port_fixed(SrsConfDirective* conf);
     virtual bool get_stream_caster_gb28181_auto_create_channel(SrsConfDirective* conf);
+    virtual srs_utime_t get_stream_caster_gb28181_sip_query_catalog_interval(SrsConfDirective* conf);
 
 // rtc section
 public:
@@ -528,17 +529,14 @@ public:
     virtual int get_rtc_server_sendmmsg();
     virtual bool get_rtc_server_encrypt();
     virtual int get_rtc_server_reuseport();
-private:
-    virtual int get_rtc_server_reuseport2();
-public:
     virtual bool get_rtc_server_merge_nalus();
     virtual bool get_rtc_server_gso();
-private:
-    virtual bool get_rtc_server_gso2();
-public:
     virtual int get_rtc_server_padding();
     virtual bool get_rtc_server_perf_stat();
     virtual int get_rtc_server_queue_length();
+private:
+    virtual int get_rtc_server_reuseport2();
+    virtual bool get_rtc_server_gso2();
 
 public:
     SrsConfDirective* get_rtc(std::string vhost);
diff --git a/trunk/src/app/srs_app_conn.cpp b/trunk/src/app/srs_app_conn.cpp
index aa3f8300a..4018ac512 100644
--- a/trunk/src/app/srs_app_conn.cpp
+++ b/trunk/src/app/srs_app_conn.cpp
@@ -103,7 +103,7 @@ srs_error_t SrsConnection::set_tcp_nodelay(bool v)
     
     int iv = (v? 1:0);
     if ((r0 = setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &iv, nb_v)) != 0) {
-        return srs_error_new(ERROR_SOCKET_NO_NODELAY, "setsockopt fd=%d, r0=%v", fd, r0);
+        return srs_error_new(ERROR_SOCKET_NO_NODELAY, "setsockopt fd=%d, r0=%d", fd, r0);
     }
     if ((r0 = getsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &iv, &nb_v)) != 0) {
         return srs_error_new(ERROR_SOCKET_NO_NODELAY, "getsockopt fd=%d, r0=%d", fd, r0);
@@ -155,7 +155,7 @@ srs_error_t SrsConnection::set_socket_buffer(srs_utime_t buffer_v)
     
     // set the socket send buffer when required larger buffer
     if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &iv, nb_v) < 0) {
-        return srs_error_new(ERROR_SOCKET_SNDBUF, "setsockopt fd=%d, r0=%v", fd, r0);
+        return srs_error_new(ERROR_SOCKET_SNDBUF, "setsockopt fd=%d, r0=%d", fd, r0);
     }
     if ((r0 = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &iv, &nb_v)) != 0) {
         return srs_error_new(ERROR_SOCKET_SNDBUF, "getsockopt fd=%d, r0=%d", fd, r0);
diff --git a/trunk/src/app/srs_app_gb28181.cpp b/trunk/src/app/srs_app_gb28181.cpp
index fe3fa90da..acea9f166 100644
--- a/trunk/src/app/srs_app_gb28181.cpp
+++ b/trunk/src/app/srs_app_gb28181.cpp
@@ -268,7 +268,7 @@ srs_error_t SrsGb28181PsRtpProcessor::on_udp_packet(const sockaddr* from, const
         }
 
         if (pprint->can_print()) {
-            srs_trace("<- " SRS_CONSTS_LOG_STREAM_CASTER " gb28181: client_id %s, peer(%s, %d) ps rtp packet %dB, age=%d, vt=%d/%u, sts=%u/%u/%#x, paylod=%dB",
+            srs_trace("<- " SRS_CONSTS_LOG_GB28181_CASTER " gb28181: client_id %s, peer(%s, %d) ps rtp packet %dB, age=%d, vt=%d/%u, sts=%u/%u/%#x, paylod=%dB",
                         channel_id.c_str(),  address_string, peer_port, nb_buf, pprint->age(), pkt.version, 
                         pkt.payload_type, pkt.sequence_number, pkt.timestamp, pkt.ssrc,
                         pkt.payload->length()
@@ -312,7 +312,12 @@ srs_error_t SrsGb28181PsRtpProcessor::on_udp_packet(const sockaddr* from, const
                 channel.set_channel_id(tmp_id);
                 channel.set_port_mode(RTP_PORT_MODE_FIXED);
                 channel.set_ssrc(pkt.ssrc);
-                _srs_gb28181->create_stream_channel(&channel);
+              
+                srs_error_t err2 = srs_success;
+                if ((err2 = _srs_gb28181->create_stream_channel(&channel)) != srs_success){
+                    srs_warn("gb28181: RtpProcessor create stream channel error %s", srs_error_desc(err2).c_str());
+                    srs_error_reset(err2);
+                };
 
                 muxer = _srs_gb28181->fetch_rtmpmuxer(tmp_id);
             }
@@ -324,7 +329,7 @@ srs_error_t SrsGb28181PsRtpProcessor::on_udp_packet(const sockaddr* from, const
                 muxer->set_channel_peer_ip(address_string);
                 //not the first peer port's non processing
                 if (muxer->channel_peer_port() != peer_port){
-                    srs_warn("<- " SRS_CONSTS_LOG_STREAM_CASTER " gb28181: client_id %s, ssrc=%#x, first peer_port=%d cur peer_port=%d",
+                    srs_warn("<- " SRS_CONSTS_LOG_GB28181_CASTER " gb28181: client_id %s, ssrc=%#x, first peer_port=%d cur peer_port=%d",
                         muxer->get_channel_id().c_str(), pkt.ssrc, muxer->channel_peer_port(), peer_port);
                     srs_freep(key->second);
                 }else {
@@ -357,6 +362,7 @@ SrsPsStreamDemixer::SrsPsStreamDemixer(ISrsPsStreamHander *h, std::string id, bo
     audio_enable = a;
     wait_first_keyframe = k;
     channel_id = id;
+    first_keyframe_flag = false;
 }
 
 SrsPsStreamDemixer::~SrsPsStreamDemixer()
@@ -404,7 +410,6 @@ int64_t  SrsPsStreamDemixer::parse_ps_timestamp(const uint8_t* p)
 srs_error_t SrsPsStreamDemixer::on_ps_stream(char* ps_data, int ps_size, uint32_t timestamp, uint32_t ssrc)
 {
     srs_error_t err = srs_success;
-    
     int complete_len = 0;
     int incomplete_len = ps_size;
     char *next_ps_pack = ps_data;
@@ -589,8 +594,10 @@ srs_error_t SrsPsStreamDemixer::on_ps_stream(char* ps_data, int ps_size, uint32_
                 //ts=1000 seq=4 mark=true payload= audio
                 incomplete_len = ps_size - complete_len; 
                 complete_len = complete_len + incomplete_len;
+                
             }
 
+            first_keyframe_flag = false;
             srs_trace("gb28181: client_id %s, unkonw ps data (%#x/%u) %02x %02x %02x %02x\n", 
                 channel_id.c_str(), ssrc, timestamp,  
                 next_ps_pack[0], next_ps_pack[1], next_ps_pack[2], next_ps_pack[3]);
@@ -599,7 +606,7 @@ srs_error_t SrsPsStreamDemixer::on_ps_stream(char* ps_data, int ps_size, uint32_
     }
 
     if (complete_len != ps_size){
-         srs_trace("gb28181:  client_id %s decode ps packet error (%#x/%u)! ps_size=%d  complete=%d \n", 
+         srs_trace("gb28181: client_id %s decode ps packet error (%#x/%u)! ps_size=%d  complete=%d \n", 
                      channel_id.c_str(), ssrc, timestamp, ps_size, complete_len);
     }else if (hander && video_stream.length() && can_send_ps_av_packet()) {
          if ((err = hander->on_rtp_video(&video_stream, video_pts)) != srs_success) {
@@ -646,6 +653,7 @@ SrsGb28181Config::SrsGb28181Config(SrsConfDirective* c)
     sip_ack_timeout = _srs_config->get_stream_caster_gb28181_ack_timeout(c);
     sip_keepalive_timeout = _srs_config->get_stream_caster_gb28181_keepalive_timeout(c);
     sip_invite_port_fixed = _srs_config->get_stream_caster_gb28181_sip_invite_port_fixed(c);
+    sip_query_catalog_interval = _srs_config->get_stream_caster_gb28181_sip_query_catalog_interval(c);
 }
 
 SrsGb28181Config::~SrsGb28181Config()
@@ -653,7 +661,6 @@ SrsGb28181Config::~SrsGb28181Config()
    
 }
 
-
 //SrsGb28181RtmpMuxer gb28181 rtmp muxer, process ps stream to rtmp
 SrsGb28181RtmpMuxer::SrsGb28181RtmpMuxer(SrsGb28181Manger* c, std::string id, bool a, bool k)
 {
@@ -675,7 +682,8 @@ SrsGb28181RtmpMuxer::SrsGb28181RtmpMuxer(SrsGb28181Manger* c, std::string id, bo
     wait_ps_queue = srs_cond_new();
 
     stream_idle_timeout = -1;
-    recv_stream_time = 0;
+    recv_rtp_stream_time = 0;
+    send_rtmp_stream_time = 0;
 
     _rtmp_url = "";
 
@@ -768,7 +776,7 @@ std::string SrsGb28181RtmpMuxer::rtmp_url()
 
 srs_utime_t SrsGb28181RtmpMuxer::get_recv_stream_time()
 {
-    return recv_stream_time;
+    return recv_rtp_stream_time;
 }
 
 
@@ -785,7 +793,8 @@ void SrsGb28181RtmpMuxer::destroy()
 srs_error_t SrsGb28181RtmpMuxer::do_cycle()
 {
     srs_error_t err = srs_success;
-    recv_stream_time =  srs_get_system_time();
+    recv_rtp_stream_time =  srs_get_system_time();
+    send_rtmp_stream_time = srs_get_system_time();
 
     //consume ps stream, and check status
     while (true) {
@@ -819,7 +828,7 @@ srs_error_t SrsGb28181RtmpMuxer::do_cycle()
         }
         
         srs_utime_t now = srs_get_system_time();
-        srs_utime_t duration = now - recv_stream_time;
+        srs_utime_t duration = now - recv_rtp_stream_time;
 
         //if no RTP data is received within 2 seconds, 
         //the peer-port and peer-ip will be cleared and 
@@ -831,13 +840,28 @@ srs_error_t SrsGb28181RtmpMuxer::do_cycle()
             channel->set_rtp_peer_port(0);
             channel->set_rtp_peer_ip("");
         }
-        
+
         SrsGb28181Config config = gb28181_manger->get_gb28181_config();
         if (duration > config.rtp_idle_timeout){
             srs_trace("gb28181: client id=%s, stream idle timeout, stop!!!", channel_id.c_str());
             break;
         }
 
+        //RTMP connection is about to timeout without receiving any data., 
+        //waiting for the next time there is data automatically connected
+        //it is related to the following two parameter settings of the rtmp server
+        //the publish 1st packet timeout in srs_utime_t
+        //publish_1stpkt_timeout  default 20000ms
+        //the publish normal packet timeout in srs_utime_t
+        //publish_normal_timeout  default 5000ms
+        duration = now - send_rtmp_stream_time;
+        bool will_timeout = duration > (5 * SRS_UTIME_SECONDS);
+        if (will_timeout && sdk){
+            srs_warn("gb28181: client id=%s RTMP connection is about to time out without receiving any data",
+                channel_id.c_str());
+            rtmp_close();
+        }
+      
         if (ps_queue.empty()){
            srs_cond_timedwait(wait_ps_queue, 200 * SRS_UTIME_MILLISECONDS);
         }else {
@@ -862,7 +886,7 @@ void SrsGb28181RtmpMuxer::ps_packet_enqueue(SrsPsRtpPacket *pkt)
 {
     srs_assert(pkt);
    
-    recv_stream_time = srs_get_system_time();
+    recv_rtp_stream_time = srs_get_system_time();
 
     //prevent consumers from being unable to process data 
     //and accumulating in the queue
@@ -923,7 +947,7 @@ srs_error_t SrsGb28181RtmpMuxer::on_rtp_video(SrsSimpleStream *stream, int64_t f
     uint32_t pts = (uint32_t)(fpts / 90);
     srs_info("gb28181rtmpmuxer: on_rtp_video dts=%u", dts);
     
-    recv_stream_time = srs_get_system_time();
+
 
     SrsBuffer *avs = new SrsBuffer(stream->bytes(), stream->length());
     SrsAutoFree(SrsBuffer, avs);
@@ -1010,8 +1034,6 @@ srs_error_t SrsGb28181RtmpMuxer::on_rtp_audio(SrsSimpleStream* stream, int64_t f
         return srs_error_wrap(err, "jitter");
     }
     
-    recv_stream_time = srs_get_system_time();
-
     uint32_t dts = (uint32_t)(fdts / 90);
 
     // send each frame.
@@ -1167,6 +1189,8 @@ srs_error_t SrsGb28181RtmpMuxer::rtmp_write_packet(char type, uint32_t timestamp
     
     SrsSharedPtrMessage* msg = NULL;
     
+    send_rtmp_stream_time = srs_get_system_time();
+
     if ((err = srs_rtmp_create_msg(type, timestamp, data, size, sdk->sid(), &msg)) != srs_success) {
         return srs_error_wrap(err, "create message");
     }
@@ -1197,8 +1221,9 @@ srs_error_t SrsGb28181RtmpMuxer::connect()
     srs_utime_t cto = SRS_CONSTS_RTMP_TIMEOUT;
     srs_utime_t sto = SRS_CONSTS_RTMP_PULSE;
     sdk = new SrsSimpleRtmpClient(url, cto, sto);
-    
+  
     srs_trace("gb28181: rtmp connect url=%s", url.c_str());
+
     if ((err = sdk->connect()) != srs_success) {
         close();
         return srs_error_wrap(err, "connect %s failed, cto=%dms, sto=%dms.", url.c_str(), srsu2msi(cto), srsu2msi(sto));
@@ -1368,8 +1393,8 @@ uint32_t SrsGb28181Manger::generate_ssrc(std::string id)
 {
     srand(uint(time(0)));
     // TODO: SSRC rules can be customized,
-    //gb28281 live ssrc max value 0999999999(3B9AC9FF)  
-    //gb28281 vod ssrc max value 1999999999(773593FF)
+    //gb28181 live ssrc max value 0999999999(3B9AC9FF)  
+    //gb28181 vod ssrc max value 1999999999(773593FF)
     uint8_t  index = uint8_t(rand() % (0x0F - 0x01 + 1) + 0x01);
     uint32_t ssrc = 0x2FFFF00 & (hash_code(id) << 8) | index;
     //uint32_t ssrc = 0x00FFFFFF & (hash_code(id));
@@ -1527,8 +1552,9 @@ void SrsGb28181Manger::stop_rtp_listen(std::string id)
 }
 
 //api
-uint32_t SrsGb28181Manger::create_stream_channel(SrsGb28181StreamChannel *channel)
+srs_error_t SrsGb28181Manger::create_stream_channel(SrsGb28181StreamChannel *channel)
 {
+    srs_error_t err = srs_success;
     srs_assert(channel);
 
     std::string id = channel->get_channel_id();
@@ -1539,15 +1565,14 @@ uint32_t SrsGb28181Manger::create_stream_channel(SrsGb28181StreamChannel *channe
        SrsGb28181StreamChannel s = muxer->get_channel();
        channel->copy(&s);
        //return ERROR_GB28181_SESSION_IS_EXIST;
-       return ERROR_SUCCESS;
+       return err;
     }
 
     //create on rtmp muxer, gb28181 stream to rtmp
-    srs_error_t err = srs_success;
+   
     if ((err = fetch_or_create_rtmpmuxer(id, &muxer)) != srs_success){
         srs_warn("gb28181: create rtmp muxer error, %s", srs_error_desc(err).c_str());
-        srs_freep(err);
-        return ERROR_GB28181_CREATER_RTMPMUXER_FAILED;
+        return err;
     }
 
     //Start RTP listening port, receive gb28181 stream, 
@@ -1564,21 +1589,19 @@ uint32_t SrsGb28181Manger::create_stream_channel(SrsGb28181StreamChannel *channe
     if (port_mode == RTP_PORT_MODE_RANDOM){
         alloc_port(&rtp_port);
         if (rtp_port <= 0){
-           return ERROR_GB28181_RTP_PORT_FULL;
+           return srs_error_new(ERROR_GB28181_RTP_PORT_FULL, "gb28181: rtp port full");
         }
-        srs_error_t err = srs_success;
+     
         if ((err = start_ps_rtp_listen(id, rtp_port)) != srs_success){
-            srs_warn("gb28181: start ps rtp listen error, %s", srs_error_desc(err).c_str());
-            srs_freep(err);
             free_port(rtp_port, rtp_port + 1);
-            return ERROR_GB28181_CREATER_RTMPMUXER_FAILED;
+            return  err;
         }
     }
     else if(port_mode == RTP_PORT_MODE_FIXED) {
         rtp_port = config->rtp_mux_port;
     }
     else{
-        return ERROR_GB28181_PORT_MODE_INVALID;
+        return srs_error_new(ERROR_GB28181_PORT_MODE_INVALID, "gb28181: port mode invalid");
     }
 
     uint32_t ssrc = channel->get_ssrc();
@@ -1653,32 +1676,36 @@ uint32_t SrsGb28181Manger::create_stream_channel(SrsGb28181StreamChannel *channe
 
     muxer->copy_channel(channel);
 
-    return ERROR_SUCCESS;
+    return err;
 }
 
-uint32_t SrsGb28181Manger::delete_stream_channel(std::string id)
+srs_error_t SrsGb28181Manger::delete_stream_channel(std::string id)
 {
+    srs_error_t err = srs_success;
+
     //notify the device to stop streaming 
     //if an internal sip service controlled channel
-    notify_sip_bye(id);
+    notify_sip_bye(id, id);
 
     SrsGb28181RtmpMuxer *muxer = fetch_rtmpmuxer(id);
     if (muxer){
         stop_rtp_listen(id);
         muxer->stop();
-       return ERROR_SUCCESS;
+       return err;
     }else {
-       return ERROR_GB28181_SESSION_IS_NOTEXIST;
+       return srs_error_new(ERROR_GB28181_SESSION_IS_NOTEXIST, "stream channel is not exists");
     }
 }
 
 
-uint32_t SrsGb28181Manger::queue_stream_channel(std::string id, SrsJsonArray* arr)
+srs_error_t SrsGb28181Manger::query_stream_channel(std::string id, SrsJsonArray* arr)
 {
+    srs_error_t err = srs_success;
+
     if (!id.empty()){
         SrsGb28181RtmpMuxer *muxer = fetch_rtmpmuxer(id);
         if (!muxer){
-            return ERROR_GB28181_SESSION_IS_NOTEXIST;
+            return srs_error_new(ERROR_GB28181_SESSION_IS_NOTEXIST, "stream channel not exists");
         }
         SrsJsonObject* obj = SrsJsonAny::object();
         arr->append(obj);
@@ -1693,27 +1720,30 @@ uint32_t SrsGb28181Manger::queue_stream_channel(std::string id, SrsJsonArray* ar
         }
     }
 
-    return ERROR_SUCCESS;
+    return err;
 }
 
-uint32_t SrsGb28181Manger::notify_sip_invite(std::string id, std::string ip, int port, uint32_t ssrc)
+srs_error_t SrsGb28181Manger::notify_sip_invite(std::string id, std::string ip, int port, uint32_t ssrc, std::string chid)
 {
+    srs_error_t err = srs_success;
+    
     if (!sip_service){
-        return ERROR_GB28181_SIP_NOT_RUN;
+        return srs_error_new(ERROR_GB28181_SIP_NOT_RUN, "sip not run");
     }
    
     //if RTMP Muxer does not exist, you need to create
-    SrsGb28181RtmpMuxer *muxer = fetch_rtmpmuxer(id);
+    std::string key = id+"@"+chid;
+    SrsGb28181RtmpMuxer *muxer = fetch_rtmpmuxer(key);
    
     if (!muxer){
         //if there is an invalid parameter, the channel will be created automatically
         if (ip.empty() || port == 0 || ssrc == 0){
              //channel not exist
             SrsGb28181StreamChannel channel;
-            channel.set_channel_id(id);
-            int code = create_stream_channel(&channel);
-            if (code != ERROR_SUCCESS){
-                return code;
+            channel.set_channel_id(key);
+            err =  create_stream_channel(&channel);
+            if (err != srs_success){
+                return err;
             }
 
             ip = channel.get_ip();
@@ -1730,30 +1760,36 @@ uint32_t SrsGb28181Manger::notify_sip_invite(std::string id, std::string ip, int
 
     SrsSipRequest req;
     req.sip_auth_id = id;
-    return sip_service->send_invite(&req, ip, port, ssrc);
-
+    return sip_service->send_invite(&req, ip, port, ssrc, chid);
 }
 
-uint32_t SrsGb28181Manger::notify_sip_bye(std::string id)
+srs_error_t SrsGb28181Manger::notify_sip_bye(std::string id, std::string chid)
 {
     if (!sip_service){
-        return ERROR_GB28181_SIP_NOT_RUN;
-    }
-
-    SrsGb28181RtmpMuxer *muxer = fetch_rtmpmuxer(id);
-    if (muxer){
-        muxer->rtmp_close();
+        return srs_error_new(ERROR_GB28181_SIP_NOT_RUN, "sip not run");
     }
 
     SrsSipRequest req;
     req.sip_auth_id = id;
-    return sip_service->send_bye(&req);
+    return sip_service->send_bye(&req, chid);
 }
 
-uint32_t SrsGb28181Manger::notify_sip_raw_data(std::string id, std::string data)
+srs_error_t SrsGb28181Manger::notify_sip_ptz(std::string id, std::string chid, std::string cmd, 
+            uint8_t speed,  int priority)
 {
     if (!sip_service){
-        return ERROR_GB28181_SIP_NOT_RUN;
+        return srs_error_new(ERROR_GB28181_SIP_NOT_RUN, "sip not run");
+    }
+
+    SrsSipRequest req;
+    req.sip_auth_id = id;
+    return sip_service->send_ptz(&req, chid, cmd, speed, priority);
+}
+
+srs_error_t SrsGb28181Manger::notify_sip_raw_data(std::string id, std::string data)
+{
+    if (!sip_service){
+        return srs_error_new(ERROR_GB28181_SIP_NOT_RUN, "sip not run");
     }
 
     SrsSipRequest req;
@@ -1762,13 +1798,31 @@ uint32_t SrsGb28181Manger::notify_sip_raw_data(std::string id, std::string data)
 
 }
 
-uint32_t SrsGb28181Manger::notify_sip_unregister(std::string id)
+srs_error_t SrsGb28181Manger::notify_sip_unregister(std::string id)
 {
     if (!sip_service){
-        return ERROR_GB28181_SIP_NOT_RUN;
+        return srs_error_new(ERROR_GB28181_SIP_NOT_RUN, "sip not run");
+    }
+    sip_service->remove_session(id);
+    return delete_stream_channel(id);
+}
+
+srs_error_t SrsGb28181Manger::notify_sip_query_catalog(std::string id)
+{
+    if (!sip_service){
+        return srs_error_new(ERROR_GB28181_SIP_NOT_RUN, "sip not run");
     }
 
-    delete_stream_channel(id);
-    sip_service->remove_session(id);
-    return ERROR_SUCCESS;
+    SrsSipRequest req;
+    req.sip_auth_id = id;
+    return sip_service->send_query_catalog(&req);
 }
+
+srs_error_t SrsGb28181Manger::query_sip_session(std::string id, SrsJsonArray* arr)
+{
+    if (!sip_service){
+        return srs_error_new(ERROR_GB28181_SIP_NOT_RUN, "sip not run");
+    }
+    
+    return sip_service->query_sip_session(id, arr);
+}
\ No newline at end of file
diff --git a/trunk/src/app/srs_app_gb28181.hpp b/trunk/src/app/srs_app_gb28181.hpp
index a7cde0b85..9f551a26a 100644
--- a/trunk/src/app/srs_app_gb28181.hpp
+++ b/trunk/src/app/srs_app_gb28181.hpp
@@ -218,7 +218,8 @@ private:
     SrsPithyPrint* pprint;
     SrsGb28181StreamChannel *channel;
     int stream_idle_timeout;
-    srs_utime_t recv_stream_time;
+    srs_utime_t recv_rtp_stream_time;
+    srs_utime_t send_rtmp_stream_time;
 private:
     std::string channel_id;
     std::string _rtmp_url;
@@ -313,6 +314,7 @@ public:
     srs_utime_t sip_keepalive_timeout;
     bool sip_auto_play;
     bool sip_invite_port_fixed;
+    srs_utime_t sip_query_catalog_interval;
  
 public:
     SrsGb28181Config(SrsConfDirective* c);
@@ -392,9 +394,7 @@ private:
     std::map rtmpmuxers_ssrc;
     std::map rtmpmuxers;
     SrsCoroutineManager* manager;
-
     SrsGb28181SipService* sip_service;
-
 public:
     SrsGb28181Manger(SrsConfDirective* c);
     virtual ~SrsGb28181Manger();
@@ -413,14 +413,17 @@ public:
 
 public:
     //stream channel api
-    uint32_t create_stream_channel(SrsGb28181StreamChannel *channel);
-    uint32_t delete_stream_channel(std::string id);
-    uint32_t queue_stream_channel(std::string id, SrsJsonArray* arr);
+    srs_error_t create_stream_channel(SrsGb28181StreamChannel *channel);
+    srs_error_t delete_stream_channel(std::string id);
+    srs_error_t query_stream_channel(std::string id, SrsJsonArray* arr);
     //sip api
-    uint32_t notify_sip_invite(std::string id, std::string ip, int port, uint32_t ssrc);
-    uint32_t notify_sip_bye(std::string id);
-    uint32_t notify_sip_raw_data(std::string id, std::string data);
-    uint32_t notify_sip_unregister(std::string id);
+    srs_error_t notify_sip_invite(std::string id, std::string ip, int port, uint32_t ssrc, std::string chid);
+    srs_error_t notify_sip_bye(std::string id, std::string chid);
+    srs_error_t notify_sip_raw_data(std::string id, std::string data);
+    srs_error_t notify_sip_unregister(std::string id);
+    srs_error_t notify_sip_query_catalog(std::string id);
+    srs_error_t notify_sip_ptz(std::string id, std::string chid, std::string cmd, uint8_t speed, int priority);
+    srs_error_t query_sip_session(std::string id, SrsJsonArray* arr);
 
 private:
     void destroy();
diff --git a/trunk/src/app/srs_app_gb28181_sip.cpp b/trunk/src/app/srs_app_gb28181_sip.cpp
index 2c819ad17..169cd1fca 100644
--- a/trunk/src/app/srs_app_gb28181_sip.cpp
+++ b/trunk/src/app/srs_app_gb28181_sip.cpp
@@ -65,6 +65,18 @@ std::string srs_get_sip_session_status_str(SrsGb28181SipSessionStatusType status
     }
 }
 
+SrsGb28181Device::SrsGb28181Device()
+{
+    device_id = ""; 
+    invite_status = SrsGb28181SipSessionUnkonw;
+    invite_time = 0;
+    device_status = "";
+    
+}
+
+SrsGb28181Device::~SrsGb28181Device()
+{}
+
 SrsGb28181SipSession::SrsGb28181SipSession(SrsGb28181SipService *c, SrsSipRequest* r)
 {
     servcie = c;
@@ -82,15 +94,19 @@ SrsGb28181SipSession::SrsGb28181SipSession(SrsGb28181SipService *c, SrsSipReques
     _register_time = 0;
     _alive_time = 0;
     _invite_time = 0;
+    _query_catalog_time = 0;
   
     _peer_ip = "";
     _peer_port = 0;
 
     _fromlen = 0;
+    _sip_cseq = 100;
 }
 
 SrsGb28181SipSession::~SrsGb28181SipSession()
 {
+    destroy();
+
     srs_freep(req);
     srs_freep(trd);
     srs_freep(pprint);
@@ -107,12 +123,25 @@ srs_error_t SrsGb28181SipSession::serve()
     return err;
 }
 
+void SrsGb28181SipSession::destroy()
+{
+    //destory all device
+    std::map::iterator it;
+    for (it = _device_list.begin(); it != _device_list.end(); ++it) {
+        srs_freep(it->second);
+    }
+
+    _device_list.clear();
+}
+
 srs_error_t SrsGb28181SipSession::do_cycle()
 {
     srs_error_t err = srs_success;
     _register_time = srs_get_system_time();
     _alive_time = srs_get_system_time();
     _invite_time = srs_get_system_time();
+    //call it immediately after alive ok;
+    _query_catalog_time = 0;
   
     while (true) {
 
@@ -121,14 +150,82 @@ srs_error_t SrsGb28181SipSession::do_cycle()
         if ((err = trd->pull()) != srs_success) {
             return srs_error_wrap(err, "gb28181 sip session cycle");
         }
-
+        
+        SrsGb28181Config *config = servcie->get_config();
         srs_utime_t now = srs_get_system_time();
         srs_utime_t reg_duration = now - _register_time;
         srs_utime_t alive_duration = now - _alive_time;
-        srs_utime_t invite_duration = now - _invite_time;
-        SrsGb28181Config *config = servcie->get_config();
+        srs_utime_t query_duration = now - _query_catalog_time;
+
+        //send invite, play client av
+        //start ps rtp listen, recv ps stream
+        if (_register_status == SrsGb28181SipSessionRegisterOk &&
+            _alive_status == SrsGb28181SipSessionAliveOk)
+        {
+            std::map::iterator it;
+            for (it = _device_list.begin(); it != _device_list.end(); it++) {
+                SrsGb28181Device *device = it->second;
+                std::string chid = it->first;
+
+                //update device invite time
+                srs_utime_t invite_duration = 0;
+                if (device->invite_time != 0){
+                    invite_duration = srs_get_system_time() - device->invite_time;
+                }
+
+                //It is possible that the camera head keeps pushing and opening, 
+                //and the duration will be very large. It will take 1 day to update
+                if (invite_duration > 24 * SRS_UTIME_HOURS){
+                    device->invite_time = srs_get_system_time();
+                }
+
+                if (device->invite_status == SrsGb28181SipSessionTrying &&
+                    invite_duration > config->sip_ack_timeout){
+                    device->invite_status = SrsGb28181SipSessionUnkonw;
+                }
+
+                if (!config->sip_auto_play) continue;
+                
+                //offline or already invite device does not need to send invite
+                if (device->device_status != "ON" || 
+                    device->invite_status != SrsGb28181SipSessionUnkonw) continue;
+
+                SrsGb28181StreamChannel ch;
+               
+                ch.set_channel_id(_session_id + "@" + chid);
+                ch.set_ip(config->host);
+
+                if (config->sip_invite_port_fixed){
+                    ch.set_port_mode(RTP_PORT_MODE_FIXED);
+                }else {
+                    ch.set_port_mode(RTP_PORT_MODE_RANDOM);
+                }
+
+                //create stream channel, ready for recv device av stream
+                srs_error_t err = _srs_gb28181->create_stream_channel(&ch);
+
+                if ((err = _srs_gb28181->create_stream_channel(&ch)) == srs_success){
+                    SrsSipRequest req;
+                    req.sip_auth_id = _session_id;
+                   
+                    //send invite to device, req push av stream
+                    err = servcie->send_invite(&req, ch.get_ip(),
+                                ch.get_rtp_port(), ch.get_ssrc(), chid);
+                }
+
+                int code = srs_error_code(err);
+                if (err != srs_success){
+                    srs_error_reset(err);
+                }
+                                       
+                //the same device can't be sent too fast. the device can't handle it
+                srs_usleep(1*SRS_UTIME_SECONDS);
+               
+                srs_trace("gb28181: %s clients device=%s send invite code=%d", 
+                    _session_id.c_str(), chid.c_str(), code);
+            }//end for (it)
+        }//end if (config)
 
-        
         if (_register_status == SrsGb28181SipSessionRegisterOk &&
             reg_duration > _reg_expires){
             srs_trace("gb28181: sip session=%s register expire", _session_id.c_str());
@@ -142,29 +239,48 @@ srs_error_t SrsGb28181SipSession::do_cycle()
             break;
         }
 
-        if (_invite_status == SrsGb28181SipSessionTrying &&
-            invite_duration > config->sip_ack_timeout){
-                _invite_status == SrsGb28181SipSessionUnkonw;
+        //query device channel
+        if (_alive_status == SrsGb28181SipSessionAliveOk &&
+            query_duration >= config->sip_query_catalog_interval) {
+            SrsSipRequest req;
+            req.sip_auth_id = _session_id;
+            _query_catalog_time = srs_get_system_time();
+
+            srs_error_t err = servcie->send_query_catalog(&req);
+            if (err != srs_success){
+                srs_trace("gb28181: sip query catalog error %s",srs_error_desc(err).c_str());
+                srs_error_reset(err);
             }
 
-        if (pprint->can_print()){
-            srs_trace("gb28181: sip session=%s peer(%s, %d) status(%s,%s,%s) duration(%u,%u,%u)",
+            //print device status
+            srs_trace("gb28181: sip session=%s peer(%s, %d) status(%s,%s) duration(%u,%u)",
                 _session_id.c_str(), _peer_ip.c_str(), _peer_port, 
                 srs_get_sip_session_status_str(_register_status).c_str(),
                 srs_get_sip_session_status_str(_alive_status).c_str(),
-                srs_get_sip_session_status_str(_invite_status).c_str(),
                 (reg_duration / SRS_UTIME_SECONDS), 
-                (alive_duration / SRS_UTIME_SECONDS),
-                (invite_duration / SRS_UTIME_SECONDS));
+                (alive_duration / SRS_UTIME_SECONDS));
+     
+            std::map::iterator it;
+            for (it = _device_list.begin(); it != _device_list.end(); it++) {
+                SrsGb28181Device *device = it->second;
+                std::string chid = it->first;
             
-            //It is possible that the camera head keeps pushing and opening, 
-            //and the duration will be very large. It will take 1 day to update
-            if (invite_duration > 24 * SRS_UTIME_HOURS){
-                _invite_time = srs_get_system_time();
+                srs_utime_t invite_duration = srs_get_system_time() - device->invite_time;
+
+                if (device->invite_status != SrsGb28181SipSessionTrying &&
+                    device->invite_status != SrsGb28181SipSessionInviteOk){
+                        invite_duration = 0;
+                }
+
+                srs_trace("gb28181: sip session=%s device=%s status(%s, %s), duration(%u)",
+                    _session_id.c_str(), chid.c_str(), device->device_status.c_str(), 
+                    srs_get_sip_session_status_str(device->invite_status).c_str(),
+                    (invite_duration / SRS_UTIME_SECONDS));
             }
         }
-        srs_usleep(5* SRS_UTIME_SECONDS);
-    }
+
+        srs_usleep(1 * SRS_UTIME_SECONDS);
+    }//end while
     
     return err;
 }
@@ -191,6 +307,72 @@ srs_error_t SrsGb28181SipSession::cycle()
     return err;
 }
 
+void SrsGb28181SipSession::update_device_list(std::map lst)
+{
+    std::map::iterator it;
+    for (it = lst.begin(); it != lst.end(); ++it) {
+        std::string id = it->first;
+        std::string status = it->second;
+
+        if  (_device_list.find(id) == _device_list.end()){
+            SrsGb28181Device *device = new SrsGb28181Device();
+            device->device_id = id;
+            device->device_status = status;
+            device->invite_status = SrsGb28181SipSessionUnkonw;
+            device->invite_time = 0;
+            _device_list[id] = device;
+
+        }else {
+            SrsGb28181Device *device = _device_list[id];
+            device->device_status = status;
+        }
+
+        // srs_trace("gb28181: sip session %s, deviceid=%s status=(%s,%s)", 
+        //     _session_id.c_str(), id.c_str(), status.c_str(),  
+        //     srs_get_sip_session_status_str(device.invite_status).c_str());
+    }
+}
+
+SrsGb28181Device* SrsGb28181SipSession::get_device_info(std::string chid)
+{
+    if (_device_list.find(chid) != _device_list.end()){
+        return _device_list[chid];
+    }
+    return NULL;
+}
+
+void SrsGb28181SipSession::dumps(SrsJsonObject* obj)
+{
+    obj->set("id", SrsJsonAny::str(_session_id.c_str()));
+    obj->set("device_sumnum", SrsJsonAny::integer(_device_list.size()));
+    
+    SrsJsonArray* arr = SrsJsonAny::array();
+    obj->set("devices", arr);
+    std::map::iterator it;
+    for (it = _device_list.begin(); it != _device_list.end(); ++it) {
+        SrsGb28181Device *device = it->second;
+        SrsJsonObject* obj = SrsJsonAny::object();
+        arr->append(obj);
+        obj->set("device_id", SrsJsonAny::str(device->device_id.c_str()));
+        obj->set("device_status", SrsJsonAny::str(device->device_status.c_str()));
+        obj->set("invite_status", SrsJsonAny::str(srs_get_sip_session_status_str(device->invite_status).c_str()));
+        obj->set("invite_time", SrsJsonAny::integer(device->invite_time/SRS_UTIME_SECONDS));
+    }
+
+    //obj->set("rtmp_port", SrsJsonAny::integer(rtmp_port));
+    // obj->set("app", SrsJsonAny::str(app.c_str()));
+    // obj->set("stream", SrsJsonAny::str(stream.c_str()));
+    // obj->set("rtmp_url", SrsJsonAny::str(rtmp_url.c_str()));
+   
+    // obj->set("ssrc", SrsJsonAny::integer(ssrc));
+    // obj->set("rtp_port", SrsJsonAny::integer(rtp_port));
+    // obj->set("port_mode", SrsJsonAny::str(port_mode.c_str()));
+    // obj->set("rtp_peer_port", SrsJsonAny::integer(rtp_peer_port));
+    // obj->set("rtp_peer_ip", SrsJsonAny::str(rtp_peer_ip.c_str()));
+    // obj->set("recv_time", SrsJsonAny::integer(recv_time/SRS_UTIME_SECONDS));
+    // obj->set("recv_time_str", SrsJsonAny::str(recv_time_str.c_str()));
+}
+
 //gb28181 sip Service
 SrsGb28181SipService::SrsGb28181SipService(SrsConfDirective* c)
 {
@@ -232,8 +414,9 @@ srs_error_t SrsGb28181SipService::on_udp_packet(const sockaddr* from, const int
     }
     std::string peer_ip = std::string(address_string);
     int peer_port = atoi(port_string);
-    
-    srs_error_t err = on_udp_sip(peer_ip, peer_port, buf, nb_buf, (sockaddr*)from, fromlen);
+
+    std::string recv_msg(buf, nb_buf);
+    srs_error_t err = on_udp_sip(peer_ip, peer_port, recv_msg, (sockaddr*)from, fromlen);
     if (err != srs_success) {
         return srs_error_wrap(err, "process udp");
     }
@@ -241,20 +424,23 @@ srs_error_t SrsGb28181SipService::on_udp_packet(const sockaddr* from, const int
 }
 
 srs_error_t SrsGb28181SipService::on_udp_sip(string peer_ip, int peer_port, 
-        char* buf, int nb_buf, sockaddr* from, const int fromlen)
+        std::string recv_msg, sockaddr* from, const int fromlen)
 {
     srs_error_t err = srs_success;
 
-    srs_info("gb28181: request peer(%s, %d) nbbuf=%d", peer_ip.c_str(), peer_port, nb_buf);
-    srs_info("gb28181: request recv message=%s", buf);
+    int recv_len = recv_msg.size();
+    char* recv_data = (char*)recv_msg.c_str();
+
+    srs_info("gb28181: request peer(%s, %d) nbbuf=%d", peer_ip.c_str(), peer_port, recv_len);
+    srs_info("gb28181: request recv message=%s", recv_data);
     
-    if (nb_buf < 10) {
+    if (recv_len < 10) {
         return err;
     }
 
     SrsSipRequest* req = NULL;
 
-    if ((err = sip->parse_request(&req, buf, nb_buf)) != srs_success) {
+    if ((err = sip->parse_request(&req, recv_data, recv_len)) != srs_success) {
         return srs_error_wrap(err, "parse sip request");
     }
  
@@ -266,6 +452,10 @@ srs_error_t SrsGb28181SipService::on_udp_sip(string peer_ip, int peer_port,
 
     if (req->is_register()) {
         std::vector serial =  srs_string_split(srs_string_replace(req->uri,"sip:", ""), "@");
+        if (serial.empty()){
+            return srs_error_new(ERROR_GB28181_SIP_PRASE_FAILED, "register string split");
+        }
+
         if (serial.at(0) != config->sip_serial){
             srs_warn("gb28181: client:%s request serial and server serial inconformity(%s:%s)",
              req->sip_auth_id.c_str(), serial.at(0).c_str(), config->sip_serial.c_str());
@@ -273,7 +463,7 @@ srs_error_t SrsGb28181SipService::on_udp_sip(string peer_ip, int peer_port,
         }
 
         srs_trace("gb28181: request client id=%s peer(%s, %d)", req->sip_auth_id.c_str(), peer_ip.c_str(), peer_port);
-        srs_trace("gb28181: request %s method=%s, uri=%s, version=%s  expires=%d", 
+        srs_trace("gb28181: %s method=%s, uri=%s, version=%s expires=%d", 
             req->get_cmdtype_str().c_str(), req->method.c_str(),
             req->uri.c_str(), req->version.c_str(), req->expires);
 
@@ -283,7 +473,8 @@ srs_error_t SrsGb28181SipService::on_udp_sip(string peer_ip, int peer_port,
             return err;
         }
         srs_assert(sip_session);
-        
+        sip_session->set_request(req);
+
         send_status(req, from, fromlen);
         sip_session->set_register_status(SrsGb28181SipSessionRegisterOk);
         sip_session->set_register_time(srs_get_system_time());
@@ -292,71 +483,50 @@ srs_error_t SrsGb28181SipService::on_udp_sip(string peer_ip, int peer_port,
         sip_session->set_sockaddr_len(fromlen);
         sip_session->set_peer_ip(peer_ip);
         sip_session->set_peer_port(peer_port);
+       
     }else if (req->is_message()) {
         SrsGb28181SipSession* sip_session = fetch(session_id);
+         
+        if (!sip_session){
+            sip_session = fetch_session_by_callid(req->call_id);
+        }
+     
         if (!sip_session || sip_session->register_status() == SrsGb28181SipSessionUnkonw){
             srs_trace("gb28181: %s client not registered", req->sip_auth_id.c_str());
             return err;
         }
        
         //reponse status 
-        send_status(req, from, fromlen);
-        //sip_session->set_register_status(SrsGb28181SipSessionRegisterOk);
-        //sip_session->set_register_time(srs_get_system_time());
-        sip_session->set_alive_status(SrsGb28181SipSessionAliveOk);
-        sip_session->set_alive_time(srs_get_system_time());
-        sip_session->set_sockaddr((sockaddr)*from);
-        sip_session->set_sockaddr_len(fromlen);
-        sip_session->set_peer_port(peer_port);
-        sip_session->set_peer_ip(peer_ip);
-
-        //send invite, play client av
-        //start ps rtp listen, recv ps stream
-        if (config->sip_auto_play && sip_session->register_status() == SrsGb28181SipSessionRegisterOk &&
-            sip_session->alive_status() == SrsGb28181SipSessionAliveOk &&
-            sip_session->invite_status() == SrsGb28181SipSessionUnkonw)
-        {
-            srs_trace("gb28181: request client id=%s, peer(%s, %d)", req->sip_auth_id.c_str(), 
-                        peer_ip.c_str(), peer_port);
-            srs_trace("gb28181: request %s method=%s, uri=%s, version=%s ", req->get_cmdtype_str().c_str(), 
-                        req->method.c_str(), req->uri.c_str(), req->version.c_str());
-
-            SrsGb28181StreamChannel ch;
-            ch.set_channel_id(session_id);
-            ch.set_ip(config->host);
-            if (config->sip_invite_port_fixed){
-               ch.set_port_mode(RTP_PORT_MODE_FIXED);
-            }else {
-               ch.set_port_mode(RTP_PORT_MODE_RANDOM);
+        if (req->cmdtype == SrsSipCmdRequest){
+            send_status(req, from, fromlen);
+            sip_session->set_alive_status(SrsGb28181SipSessionAliveOk);
+            sip_session->set_alive_time(srs_get_system_time());
+            sip_session->set_sockaddr((sockaddr)*from);
+            sip_session->set_sockaddr_len(fromlen);
+            sip_session->set_peer_port(peer_port);
+            sip_session->set_peer_ip(peer_ip);
+            
+            //update device list
+            if (req->device_list_map.size() > 0){
+                sip_session->update_device_list(req->device_list_map);
             }
-
-            int code = _srs_gb28181->create_stream_channel(&ch);
-            if (code == ERROR_SUCCESS){
-                code = send_invite(req, ch.get_ip(),
-                        ch.get_rtp_port(), ch.get_ssrc());
-            }
-
-            if (code == ERROR_SUCCESS){
-                sip_session->set_invite_status(SrsGb28181SipSessionTrying);
-                sip_session->set_invite_time(srs_get_system_time());
-            }
-          
         }
+       
     }else if (req->is_invite()) {
-        SrsGb28181SipSession* sip_session = fetch(session_id);
+        SrsGb28181SipSession* sip_session = fetch_session_by_callid(req->call_id);
 
         srs_trace("gb28181: request client id=%s, peer(%s, %d)", req->sip_auth_id.c_str(), 
                         peer_ip.c_str(), peer_port);
-        srs_trace("gb28181: request %s method=%s, uri=%s, version=%s ", 
+        srs_trace("gb28181: %s method=%s, uri=%s, version=%s ", 
             req->get_cmdtype_str().c_str(), req->method.c_str(), req->uri.c_str(), req->version.c_str());
        
         if (!sip_session){
-            srs_trace("gb28181: %s client not registered", req->sip_auth_id.c_str());
+            srs_trace("gb28181: call_id %s not map %s client ", req->call_id.c_str(), req->sip_auth_id.c_str());
             return err;
         }
         
-        sip_session->set_sockaddr((sockaddr)*from);
-        sip_session->set_sockaddr_len(fromlen);
+        // sip_session->set_sockaddr((sockaddr)*from);
+        // sip_session->set_sockaddr_len(fromlen);
 
         if (sip_session->register_status() == SrsGb28181SipSessionUnkonw ||
             sip_session->alive_status() == SrsGb28181SipSessionUnkonw) {
@@ -364,37 +534,72 @@ srs_error_t SrsGb28181SipService::on_udp_sip(string peer_ip, int peer_port,
             return err;
         }
         
-        if (req->cmdtype == SrsSipCmdRespone && req->status == "200") {
+        if (req->cmdtype == SrsSipCmdRespone){
             srs_trace("gb28181: INVITE response %s client status=%s", req->sip_auth_id.c_str(), req->status.c_str());
-            send_ack(req, from, fromlen);
-            sip_session->set_invite_status(SrsGb28181SipSessionInviteOk);
-            sip_session->set_invite_time(srs_get_system_time());
-            //Record tag and branch, which are required by the 'bye' command,
-            sip_session->set_request(req);
-        }else{
-            sip_session->set_invite_status(SrsGb28181SipSessionUnkonw);
-            sip_session->set_invite_time(srs_get_system_time());
+
+            if (req->status == "200") {
+                send_ack(req, from, fromlen);
+                SrsGb28181Device *device = sip_session->get_device_info(req->sip_auth_id);
+                if (device){
+                    device->invite_status = SrsGb28181SipSessionInviteOk;
+                    device->req_inivate.copy(req);
+                    device->invite_time = srs_get_system_time();
+                }
+            }else if (req->status == "100") {
+                //send_ack(req, from, fromlen);
+                SrsGb28181Device *device = sip_session->get_device_info(req->sip_auth_id);
+                if (device){
+                    device->req_inivate.copy(req);
+                    device->invite_status = SrsGb28181SipSessionTrying;
+                    device->invite_time = srs_get_system_time();
+                }
+            }else{
+                SrsGb28181Device *device = sip_session->get_device_info(req->sip_auth_id);
+                if (device){
+                    device->req_inivate.copy(req);
+                    device->invite_status = SrsGb28181SipSessionUnkonw;
+                    device->invite_time = srs_get_system_time();
+                }
+            }
         }
+       
     }else if (req->is_bye()) {
         srs_trace("gb28181: request client id=%s, peer(%s, %d)", req->sip_auth_id.c_str(), 
                         peer_ip.c_str(), peer_port);
-        srs_trace("gb28181: request %s method=%s, uri=%s, version=%s ", 
+        srs_trace("gb28181: %s method=%s, uri=%s, version=%s ", 
             req->get_cmdtype_str().c_str(), req->method.c_str(), req->uri.c_str(), req->version.c_str());
       
-        SrsGb28181SipSession* sip_session = fetch(session_id);
         send_status(req, from, fromlen);
 
+        SrsGb28181SipSession* sip_session = fetch_session_by_callid(req->call_id);
+        srs_trace("gb28181: request client id=%s, peer(%s, %d)", req->sip_auth_id.c_str(), 
+                        peer_ip.c_str(), peer_port);
+        srs_trace("gb28181: %s method=%s, uri=%s, version=%s ", 
+            req->get_cmdtype_str().c_str(), req->method.c_str(), req->uri.c_str(), req->version.c_str());
+       
         if (!sip_session){
-            srs_trace("gb28181: %s client not registered", req->sip_auth_id.c_str());
+            srs_trace("gb28181: call_id %s not map %s client ", req->call_id.c_str(), req->sip_auth_id.c_str());
             return err;
         }
 
-        sip_session->set_sockaddr((sockaddr)*from);
-        sip_session->set_sockaddr_len(fromlen);
-       
-        sip_session->set_invite_status(SrsGb28181SipSessionBye);
-        sip_session->set_invite_time(srs_get_system_time());
-   
+        if (req->cmdtype == SrsSipCmdRespone){
+            srs_trace("gb28181: BYE  %s client status=%s", req->sip_auth_id.c_str(), req->status.c_str());
+
+            if (req->status == "200") {
+                SrsGb28181Device *device = sip_session->get_device_info(req->sip_auth_id);
+                if (device){
+                    device->invite_status = SrsGb28181SipSessionBye;
+                    device->invite_time = srs_get_system_time();
+                }
+            }else {
+                //TODO:fixme
+                SrsGb28181Device *device = sip_session->get_device_info(req->sip_auth_id);
+                if (device){
+                    device->invite_status = SrsGb28181SipSessionBye;
+                    device->invite_time = srs_get_system_time();
+                }
+            }
+        }
     }else{
         srs_trace("gb28181: ingor request method=%s", req->method.c_str());
     }
@@ -427,6 +632,7 @@ int SrsGb28181SipService::send_ack(SrsSipRequest *req, sockaddr *f, int l)
     req->host_port = config->sip_port;
     req->realm = config->sip_realm;
     req->serial = config->sip_serial;
+    req->chid = req->sip_auth_id;
 
     sip->req_ack(ss, req);
     return send_message(f, l, ss);
@@ -448,64 +654,97 @@ int SrsGb28181SipService::send_status(SrsSipRequest *req,  sockaddr *f, int l)
 }
 
 
-int  SrsGb28181SipService::send_invite(SrsSipRequest *req,  string ip, int port, uint32_t ssrc)
+srs_error_t  SrsGb28181SipService::send_invite(SrsSipRequest *req,  string ip, int port, uint32_t ssrc, std::string chid)
 {
+    srs_error_t err = srs_success;
+
     srs_assert(req);
 
     SrsGb28181SipSession *sip_session = fetch(req->sip_auth_id);
 
     if (!sip_session){
-        return ERROR_GB28181_SESSION_IS_NOTEXIST;
+        return srs_error_new(ERROR_GB28181_SESSION_IS_NOTEXIST, "sip session not exist");
     }
     
     //if you are inviting or succeed in invite, 
     //you cannot invite again. you need to 'bye' and try again
-    if (sip_session->invite_status() == SrsGb28181SipSessionTrying ||
-        sip_session->invite_status() == SrsGb28181SipSessionInviteOk){
-        return ERROR_GB28181_SIP_IS_INVITING;   
+    SrsGb28181Device *device = sip_session->get_device_info(chid);
+    if (!device || device->device_status != "ON"){
+        return srs_error_new(ERROR_GB28181_SIP_CH_OFFLINE, "sip device channel offline");
     }
-   
+
+    if (device->invite_status  == SrsGb28181SipSessionTrying ||
+        device->invite_status  == SrsGb28181SipSessionInviteOk){
+        return srs_error_new(ERROR_GB28181_SIP_IS_INVITING, "sip device channel inviting");   
+    }
+
     req->host =  config->host;
     req->host_port = config->sip_port;
     req->realm = config->sip_realm;
     req->serial = config->sip_serial;
+    req->chid = chid;
+    req->seq = sip_session->sip_cseq();
 
+    SrsSipRequest register_req = sip_session->request();
+    req->to_realm = register_req.to_realm;
+    req->from_realm = config->sip_realm;
+   
     std::stringstream ss;
     sip->req_invite(ss, req, ip, port, ssrc);
-
+   
     sockaddr addr = sip_session->sockaddr_from();
 
     if (send_message(&addr, sip_session->sockaddr_fromlen(), ss) <= 0)
     {
-        return ERROR_GB28181_SIP_INVITE_FAILED;
+        return srs_error_new(ERROR_GB28181_SIP_INVITE_FAILED, "sip device invite failed");
     }
 
-    sip_session->set_invite_status(SrsGb28181SipSessionTrying);
+    //prame branch, from_tag, to_tag, call_id, 
+    //The parameter of 'bye' must be the same as 'invite'
+    device->req_inivate.copy(req);
+    device->invite_time = srs_get_system_time();
+    device->invite_status = SrsGb28181SipSessionTrying;
 
-    return ERROR_SUCCESS;
+    //call_id map sip_session
+    sip_session_map_by_callid(sip_session, req->call_id);
 
+    return err;
 }
 
-int SrsGb28181SipService::send_bye(SrsSipRequest *req)
+srs_error_t SrsGb28181SipService::send_bye(SrsSipRequest *req, std::string chid)
 {
+    srs_error_t err = srs_success;
+
     srs_assert(req);
 
     SrsGb28181SipSession *sip_session = fetch(req->sip_auth_id);
 
     if (!sip_session){
-        return ERROR_GB28181_SESSION_IS_NOTEXIST;
+        return srs_error_new(ERROR_GB28181_SESSION_IS_NOTEXIST, "sip session not exist");
     }
 
+    SrsGb28181Device *device = sip_session->get_device_info(chid);
+    if (!device){
+        return srs_error_new(ERROR_GB28181_SIP_CH_NOTEXIST, "sip device channel not exist");
+    }
+   
     //prame branch, from_tag, to_tag, call_id, 
     //The parameter of 'bye' must be the same as 'invite'
-    SrsSipRequest r = sip_session->request();
-    req->copy(&r);
+    //SrsSipRequest r = sip_session->request();
 
-    req->host =  config->host;
+    req->copy(&device->req_inivate);
+
+    req->host = config->host;
     req->host_port = config->sip_port;
     req->realm = config->sip_realm;
     req->serial = config->sip_serial;
-
+    req->chid = chid;
+    req->seq = sip_session->sip_cseq();
+    
+    SrsSipRequest register_req = sip_session->request();
+    req->to_realm = register_req.to_realm;
+    req->from_realm = config->sip_realm;
+   
     //get protocol stack 
     std::stringstream ss;
     sip->req_bye(ss, req);
@@ -513,20 +752,22 @@ int SrsGb28181SipService::send_bye(SrsSipRequest *req)
     sockaddr addr = sip_session->sockaddr_from();
     if (send_message(&addr, sip_session->sockaddr_fromlen(), ss) <= 0)
     {
-        return ERROR_GB28181_SIP_BYE_FAILED;
+        return srs_error_new(ERROR_GB28181_SIP_BYE_FAILED, "sip bye failed");
     }
 
-    return ERROR_SUCCESS;
+    return err;
 }
 
-int SrsGb28181SipService::send_sip_raw_data(SrsSipRequest *req,  std::string data)
+srs_error_t SrsGb28181SipService::send_sip_raw_data(SrsSipRequest *req,  std::string data)
 {
+    srs_error_t err = srs_success;
+
     srs_assert(req);
 
     SrsGb28181SipSession *sip_session = fetch(req->sip_auth_id);
 
     if (!sip_session){
-        return ERROR_GB28181_SESSION_IS_NOTEXIST;
+        return srs_error_new(ERROR_GB28181_SESSION_IS_NOTEXIST, "sip session no exist");
     }
     
     std::stringstream ss;
@@ -535,10 +776,140 @@ int SrsGb28181SipService::send_sip_raw_data(SrsSipRequest *req,  std::string dat
     sockaddr addr = sip_session->sockaddr_from();
     if (send_message(&addr, sip_session->sockaddr_fromlen(), ss) <= 0)
     {
-        return ERROR_GB28181_SIP_BYE_FAILED;
+        return srs_error_new(ERROR_GB28181_SIP_RAW_DATA_FAILED, "sip raw data failed");
     }
 
-    return ERROR_SUCCESS;
+    return err;
+}
+
+srs_error_t SrsGb28181SipService::send_query_catalog(SrsSipRequest *req)
+{
+    srs_error_t err = srs_success;
+
+    srs_assert(req);
+
+    SrsGb28181SipSession *sip_session = fetch(req->sip_auth_id);
+
+    if (!sip_session){
+        return srs_error_new(ERROR_GB28181_SESSION_IS_NOTEXIST, "sip session not exist");
+    }
+
+    req->host = config->host;
+    req->host_port = config->sip_port;
+    req->realm = config->sip_realm;
+    req->serial = config->sip_serial;
+    req->chid = req->sip_auth_id;
+    req->seq = sip_session->sip_cseq();
+
+    //get protocol stack 
+    std::stringstream ss;
+    sip->req_query_catalog(ss, req);
+
+    return send_sip_raw_data(req, ss.str());
+}
+
+srs_error_t SrsGb28181SipService::send_ptz(SrsSipRequest *req, std::string chid, std::string cmd, 
+            uint8_t speed, int priority)
+{
+    srs_error_t err = srs_success;
+
+    srs_assert(req);
+
+    SrsGb28181SipSession *sip_session = fetch(req->sip_auth_id);
+
+    if (!sip_session){
+        return srs_error_new(ERROR_GB28181_SESSION_IS_NOTEXIST, "sip session not exist");
+    }
+
+    SrsGb28181Device *device = sip_session->get_device_info(chid);
+    if (!device){
+        return srs_error_new(ERROR_GB28181_SIP_CH_NOTEXIST, "sip device channel not exist");
+    }
+
+    if (device->invite_status  != SrsGb28181SipSessionInviteOk){
+        return srs_error_new(ERROR_GB28181_SIP_NOT_INVITE, "sip device channel not inviting");   
+    }
+   
+    //prame branch, from_tag, to_tag, call_id, 
+    //The parameter of 'bye' must be the same as 'invite'
+    //SrsSipRequest r = sip_session->request();
+    req->copy(&device->req_inivate);
+
+    req->host = config->host;
+    req->host_port = config->sip_port;
+    req->realm = config->sip_realm;
+    req->serial = config->sip_serial;
+    req->chid = chid;
+    req->seq = sip_session->sip_cseq();
+    
+    SrsSipPtzCmdType ptzcmd = SrsSipPtzCmdRight;
+    const char *ss_cmd = cmd.c_str();
+    if (!strcasecmp(ss_cmd, "stop")){
+        ptzcmd = SrsSipPtzCmdStop;
+    }else if (!strcasecmp(ss_cmd, "right")){
+        ptzcmd = SrsSipPtzCmdRight;
+    }else if (!strcasecmp(ss_cmd, "left")){
+        ptzcmd = SrsSipPtzCmdLeft;
+    }else if (!strcasecmp(ss_cmd, "down")){
+        ptzcmd = SrsSipPtzCmdDown;
+    }else if (!strcasecmp(ss_cmd, "up")){
+        ptzcmd = SrsSipPtzCmdUp;
+    }else if (!strcasecmp(ss_cmd, "zoomout")){
+        ptzcmd = SrsSipPtzCmdZoomOut;
+    }else if (!strcasecmp(ss_cmd, "zoomin")){    
+        ptzcmd = SrsSipPtzCmdZoomIn;
+    }else{
+        return srs_error_new(ERROR_GB28181_SIP_PTZ_CMD_INVALID, "sip ptz cmd no support");  
+    }
+
+    if (speed < 0 || speed > 0xFF){
+        return srs_error_new(ERROR_GB28181_SIP_PTZ_CMD_INVALID, "sip ptz cmd speed out of range");  
+    }
+
+    if (priority <= 0 ){
+        priority = 5;
+    }
+
+    //get protocol stack 
+    std::stringstream ss;
+    sip->req_ptz(ss, req, ptzcmd, speed, priority);
+   
+    sockaddr addr = sip_session->sockaddr_from();
+    if (send_message(&addr, sip_session->sockaddr_fromlen(), ss) <= 0)
+    {
+        return srs_error_new(ERROR_GB28181_SIP_PTZ_FAILED, "sip ptz failed");
+    }
+
+    //call_id map sip_session
+    sip_session_map_by_callid(sip_session, req->call_id);
+
+    return err;
+
+}
+
+srs_error_t SrsGb28181SipService::query_sip_session(std::string sid,  SrsJsonArray* arr)
+{
+    srs_error_t err = srs_success;
+
+    if (!sid.empty()){
+        SrsGb28181SipSession* sess = fetch(sid);
+        if (!sess){
+            return srs_error_new(ERROR_GB28181_SESSION_IS_NOTEXIST, "sip session not exist");
+        }
+        SrsJsonObject* obj = SrsJsonAny::object();
+        arr->append(obj);
+        sess->dumps(obj);
+    }else {
+        std::map::iterator it;
+        for (it = sessions.begin(); it != sessions.end(); ++it) {
+            SrsGb28181SipSession* sess = it->second;
+            SrsJsonObject* obj = SrsJsonAny::object();
+            arr->append(obj);
+            sess->dumps(obj);
+        }
+    }
+
+    return err;
 }
 
 srs_error_t SrsGb28181SipService::fetch_or_create_sip_session(SrsSipRequest *req,  SrsGb28181SipSession** sip_session)
@@ -596,4 +967,30 @@ void SrsGb28181SipService::destroy()
     sessions.clear();
 }
 
+void SrsGb28181SipService::sip_session_map_by_callid(SrsGb28181SipSession *sess, std::string call_id)
+{
+    if (sessions_by_callid.find(call_id) == sessions_by_callid.end()) {
+        sessions_by_callid[call_id] = sess;
+    }
+}
+
+void SrsGb28181SipService::sip_session_unmap_by_callid(std::string call_id)
+{
+    std::map::iterator it = sessions_by_callid.find(call_id);
+    if (it != sessions_by_callid.end()) {
+        sessions_by_callid.erase(it);
+    }
+}
+
+SrsGb28181SipSession* SrsGb28181SipService::fetch_session_by_callid(std::string call_id)
+{
+    SrsGb28181SipSession* session = NULL;
+    if (sessions_by_callid.find(call_id) == sessions_by_callid.end()) {
+        return NULL;
+    }
+    
+    session = sessions_by_callid[call_id];
+    return session;
+}
+
 
diff --git a/trunk/src/app/srs_app_gb28181_sip.hpp b/trunk/src/app/srs_app_gb28181_sip.hpp
index d42d59e41..10d180ee8 100644
--- a/trunk/src/app/srs_app_gb28181_sip.hpp
+++ b/trunk/src/app/srs_app_gb28181_sip.hpp
@@ -41,6 +41,7 @@ class SrsSipRequest;
 class SrsGb28181Config;
 class SrsSipStack;
 class SrsGb28181SipService;
+class SrsGb28181Device;
 
 enum SrsGb28181SipSessionStatusType{
      SrsGb28181SipSessionUnkonw = 0,
@@ -51,6 +52,19 @@ enum SrsGb28181SipSessionStatusType{
      SrsGb28181SipSessionBye = 5,
 };
 
+class SrsGb28181Device
+{
+public:
+    SrsGb28181Device();
+    virtual ~SrsGb28181Device();
+public:
+    std::string device_id;
+    std::string device_status;
+    SrsGb28181SipSessionStatusType  invite_status; 
+    srs_utime_t  invite_time;
+    SrsSipRequest  req_inivate;
+};
+
 class SrsGb28181SipSession: public ISrsCoroutineHandler, public ISrsConnection
 {
 private:
@@ -67,6 +81,7 @@ private:
     srs_utime_t _alive_time;
     srs_utime_t _invite_time;
     srs_utime_t _reg_expires;
+    srs_utime_t _query_catalog_time;
 
     std::string _peer_ip;
     int _peer_port;
@@ -75,10 +90,17 @@ private:
     int _fromlen;
     SrsSipRequest *req;
 
+    std::map _device_list;
+    //std::map _device_status;
+    int _sip_cseq;
+
 public:
     SrsGb28181SipSession(SrsGb28181SipService *c, SrsSipRequest* r);
     virtual ~SrsGb28181SipSession();
 
+private:
+    void destroy();
+
 public:
     void set_register_status(SrsGb28181SipSessionStatusType s) { _register_status = s;}
     void set_alive_status(SrsGb28181SipSessionStatusType s) { _alive_status = s;}
@@ -94,7 +116,6 @@ public:
     void set_sockaddr_len(int l) { _fromlen = l;}
     void set_request(SrsSipRequest *r) { req->copy(r);}
 
-
     SrsGb28181SipSessionStatusType register_status() { return _register_status;}
     SrsGb28181SipSessionStatusType alive_status() { return  _alive_status;}
     SrsGb28181SipSessionStatusType invite_status() { return  _invite_status;}
@@ -108,8 +129,13 @@ public:
     sockaddr  sockaddr_from() { return _from;}
     int sockaddr_fromlen() { return _fromlen;}
     SrsSipRequest request() { return *req;}
+    int sip_cseq(){ return _sip_cseq++;}
 
     std::string session_id() { return _session_id;}
+public:
+    void update_device_list(std::map devlist);
+    SrsGb28181Device *get_device_info(std::string chid);
+    void dumps(SrsJsonObject* obj);
 
 public:
     virtual srs_error_t serve();
@@ -130,6 +156,7 @@ private:
     srs_netfd_t lfd;
 
     std::map sessions;
+    std::map sessions_by_callid;
 public:
     SrsGb28181SipService(SrsConfDirective* c);
     virtual ~SrsGb28181SipService();
@@ -140,15 +167,17 @@ public:
     virtual void set_stfd(srs_netfd_t fd);
 private:
     void destroy();
-    srs_error_t on_udp_sip(std::string host, int port, char* buf, int nb_buf, sockaddr* from, int fromlen);
+    srs_error_t on_udp_sip(std::string host, int port, std::string recv_msg, sockaddr* from, int fromlen);
 public:
     int send_message(sockaddr* f, int l, std::stringstream& ss);
    
     int send_ack(SrsSipRequest *req, sockaddr *f, int l);
     int send_status(SrsSipRequest *req, sockaddr *f, int l);
 
-    int send_invite(SrsSipRequest *req, std::string ip, int port, uint32_t ssrc);
-    int send_bye(SrsSipRequest *req);
+    srs_error_t send_invite(SrsSipRequest *req, std::string ip, int port, uint32_t ssrc, std::string chid);
+    srs_error_t send_bye(SrsSipRequest *req, std::string chid);
+    srs_error_t send_query_catalog(SrsSipRequest *req);
+    srs_error_t send_ptz(SrsSipRequest *req, std::string chid, std::string cmd, uint8_t speed, int priority);
 
     // The SIP command is transmitted through HTTP API, 
     // and the body content is transmitted to the device, 
@@ -164,7 +193,8 @@ public:
     // Content-Length: 0
     //
     //
-    int send_sip_raw_data(SrsSipRequest *req, std::string data);
+    srs_error_t send_sip_raw_data(SrsSipRequest *req, std::string data);
+    srs_error_t query_sip_session(std::string sid,  SrsJsonArray* arr);
 
 public:
     srs_error_t fetch_or_create_sip_session(SrsSipRequest *req,  SrsGb28181SipSession** sess);
@@ -172,6 +202,9 @@ public:
     void remove_session(std::string id);
     SrsGb28181Config* get_config();
     
+    void sip_session_map_by_callid(SrsGb28181SipSession *sess, std::string call_id);
+    void sip_session_unmap_by_callid(std::string call_id);
+    SrsGb28181SipSession* fetch_session_by_callid(std::string call_id);
 };
 
 #endif
diff --git a/trunk/src/app/srs_app_http_api.cpp b/trunk/src/app/srs_app_http_api.cpp
index 61552def2..071a0b8b5 100644
--- a/trunk/src/app/srs_app_http_api.cpp
+++ b/trunk/src/app/srs_app_http_api.cpp
@@ -1741,6 +1741,21 @@ SrsGoApiGb28181::~SrsGoApiGb28181()
 
 srs_error_t SrsGoApiGb28181::serve_http(ISrsHttpResponseWriter* w, ISrsHttpMessage* r)
 {
+    srs_error_t err = srs_success;
+
+    if ((err = do_serve_http(w, r)) != srs_success) {
+        srs_warn("Server GB28181 err %s", srs_error_desc(err).c_str());
+        int code = srs_error_code(err); srs_error_reset(err);
+        return srs_api_response_code(w, r, code);
+    }
+
+    return err;
+}
+
+srs_error_t SrsGoApiGb28181::do_serve_http(ISrsHttpResponseWriter* w, ISrsHttpMessage* r)
+{
+    srs_error_t err = srs_success;
+
     SrsJsonObject* obj = SrsJsonAny::object();
     SrsAutoFree(SrsJsonObject, obj);
     
@@ -1756,103 +1771,144 @@ srs_error_t SrsGoApiGb28181::serve_http(ISrsHttpResponseWriter* w, ISrsHttpMessa
     //fixed, random
     string port_mode = r->query_get("port_mode");
    
-    if (_srs_gb28181) {
-        if(action == "create_channel"){
-            if (id.empty()){
-                return srs_api_response_code(w, r, ERROR_GB28181_VALUE_EMPTY);
-            }
+    if (!_srs_gb28181) {
+        return srs_error_new(ERROR_GB28181_SERVER_NOT_RUN, "no gb28181 engine");
+    }
 
-            SrsGb28181StreamChannel channel;
-            channel.set_channel_id(id);
-            channel.set_app(app);
-            channel.set_stream(stream);
-            channel.set_port_mode(port_mode);
-
-            uint32_t code = _srs_gb28181->create_stream_channel(&channel);
-            if (code != ERROR_SUCCESS) {
-                return srs_api_response_code(w, r, code);
-            }
-           
-            data->set("query", SrsJsonAny::object()
-              ->set("id", SrsJsonAny::str(channel.get_channel_id().c_str()))
-              ->set("ip", SrsJsonAny::str(channel.get_ip().c_str()))
-              ->set("rtmp_port", SrsJsonAny::integer(channel.get_rtmp_port()))
-              ->set("app", SrsJsonAny::str(channel.get_app().c_str()))
-              ->set("stream", SrsJsonAny::str(channel.get_stream().c_str()))
-              ->set("rtp_port", SrsJsonAny::integer(channel.get_rtp_port()))
-              ->set("ssrc", SrsJsonAny::integer(channel.get_ssrc())));
-            return srs_api_response(w, r, obj->dumps());
-       
-        }
-        else if(action == "delete_channel"){
-           if (id.empty()){
-                return srs_api_response_code(w, r, ERROR_GB28181_VALUE_EMPTY);
-            }
-
-            uint32_t code = _srs_gb28181->delete_stream_channel(id);
-            return srs_api_response_code(w, r, code);
-        }
-        else if(action == "query_channel") {
-            SrsJsonArray* arr = SrsJsonAny::array();
-            data->set("channels", arr);
-           
-            uint32_t code = _srs_gb28181->queue_stream_channel(id, arr);
-            if (code != ERROR_SUCCESS) {
-                return srs_api_response_code(w, r, code);
-            }
-
-            return srs_api_response(w, r, obj->dumps());
-        }
-        else if(action == "sip_invite"){
-            if (id.empty()){
-                return srs_api_response_code(w, r, ERROR_GB28181_VALUE_EMPTY);
-            }
-
-            string ssrc = r->query_get("ssrc");
-            string rtp_port = r->query_get("rtp_port");
-            string ip = r->query_get("ip");
-
-            int _port = strtoul(rtp_port.c_str(), NULL, 10);
-            uint32_t _ssrc = (uint32_t)(strtoul(ssrc.c_str(), NULL, 10));
-
-           
-
-            int code = _srs_gb28181->notify_sip_invite(id, ip, _port, _ssrc);
-            return srs_api_response_code(w, r, code);
-        }
-        else if(action == "sip_bye"){
-            if (id.empty()){
-                return srs_api_response_code(w, r, ERROR_GB28181_VALUE_EMPTY);
-            }
-
-            int code = _srs_gb28181->notify_sip_bye(id);
-            return srs_api_response_code(w, r, code);
-        }
-        else if(action == "sip_raw_data"){
-            if (id.empty()){
-                return srs_api_response_code(w, r, ERROR_GB28181_VALUE_EMPTY);
-            }
-
-            std::string body;
-            r->body_read_all(body);
-            int code = _srs_gb28181->notify_sip_raw_data(id, body);
-            return srs_api_response_code(w, r, code);
-        }
-        else if(action == "sip_unregister"){
-            if (id.empty()){
-                return srs_api_response_code(w, r, ERROR_GB28181_VALUE_EMPTY);
-            }
-            
-            int code = _srs_gb28181->notify_sip_unregister(id);
-            return srs_api_response_code(w, r, code);
-        }
-        else
-        {
-            return srs_api_response_code(w, r, ERROR_GB28181_ACTION_INVALID);
+    if(action == "create_channel"){
+        if (id.empty()){
+            return srs_error_new(ERROR_GB28181_VALUE_EMPTY, "no id");
         }
 
-    }else {
-        return srs_api_response_code(w, r, ERROR_GB28181_SERVER_NOT_RUN);
+        SrsGb28181StreamChannel channel;
+        channel.set_channel_id(id);
+        channel.set_app(app);
+        channel.set_stream(stream);
+        channel.set_port_mode(port_mode);
+
+        if ((err = _srs_gb28181->create_stream_channel(&channel)) != srs_success) {
+            return srs_error_wrap(err, "create stream channel");
+        }
+
+        data->set("query", SrsJsonAny::object()
+          ->set("id", SrsJsonAny::str(channel.get_channel_id().c_str()))
+          ->set("ip", SrsJsonAny::str(channel.get_ip().c_str()))
+          ->set("rtmp_port", SrsJsonAny::integer(channel.get_rtmp_port()))
+          ->set("app", SrsJsonAny::str(channel.get_app().c_str()))
+          ->set("stream", SrsJsonAny::str(channel.get_stream().c_str()))
+          ->set("rtp_port", SrsJsonAny::integer(channel.get_rtp_port()))
+          ->set("ssrc", SrsJsonAny::integer(channel.get_ssrc())));
+        return srs_api_response(w, r, obj->dumps());
+
+    } else if(action == "delete_channel"){
+       if (id.empty()){
+            return srs_error_new(ERROR_GB28181_VALUE_EMPTY, "no id");
+        }
+
+        if ((err = _srs_gb28181->delete_stream_channel(id)) != srs_success) {
+            return srs_error_wrap(err, "delete stream channel");
+        }
+
+        return srs_api_response_code(w, r, 0);
+    } else if(action == "query_channel") {
+        SrsJsonArray* arr = SrsJsonAny::array();
+        data->set("channels", arr);
+
+        if ((err = _srs_gb28181->query_stream_channel(id, arr)) != srs_success) {
+            return srs_error_wrap(err, "query stream channel");
+        }
+
+        return srs_api_response(w, r, obj->dumps());
+    } else if(action == "sip_invite"){
+        string chid = r->query_get("chid");
+        if (id.empty() || chid.empty()){
+            return srs_error_new(ERROR_GB28181_VALUE_EMPTY, "no id or chid");
+        }
+
+        string ssrc = r->query_get("ssrc");
+        string rtp_port = r->query_get("rtp_port");
+        string ip = r->query_get("ip");
+
+        int _port = strtoul(rtp_port.c_str(), NULL, 10);
+        uint32_t _ssrc = (uint32_t)(strtoul(ssrc.c_str(), NULL, 10));
+
+        if ((err = _srs_gb28181->notify_sip_invite(id, ip, _port, _ssrc, chid)) != srs_success) {
+            return srs_error_wrap(err, "notify sip invite");
+        }
+
+        return srs_api_response_code(w, r, 0);
+    } else if(action == "sip_bye"){
+        string chid = r->query_get("chid");
+        if (id.empty() || chid.empty()){
+            return srs_error_new(ERROR_GB28181_VALUE_EMPTY, "no id or chid");
+        }
+
+        if ((err = _srs_gb28181->notify_sip_bye(id, chid)) != srs_success) {
+            return srs_error_wrap(err, "notify sip bye");
+        }
+
+        return srs_api_response_code(w, r, 0);
+    } else if(action == "sip_ptz"){
+        string chid = r->query_get("chid");
+        string ptzcmd = r->query_get("ptzcmd");
+        string speed = r->query_get("speed");
+        string priority = r->query_get("priority");
+        if (id.empty() || chid.empty() || ptzcmd.empty() || speed.empty()){
+            return srs_error_new(ERROR_GB28181_VALUE_EMPTY, "no id or chid or ptzcmd or speed");
+        }
+
+        uint8_t _speed = (uint8_t)(strtoul(speed.c_str(), NULL, 10));
+        int _priority = (int)(strtoul(priority.c_str(), NULL, 10));
+
+        if ((err = _srs_gb28181->notify_sip_ptz(id, chid, ptzcmd, _speed, _priority)) != srs_success) {
+            return srs_error_wrap(err, "notify sip ptz");
+        }
+
+        return srs_api_response_code(w, r, 0);
+    } else if(action == "sip_raw_data"){
+        if (id.empty()){
+            return srs_error_new(ERROR_GB28181_VALUE_EMPTY, "no id");
+        }
+
+        std::string body;
+        r->body_read_all(body);
+
+        if ((err = _srs_gb28181->notify_sip_raw_data(id, body)) != srs_success) {
+            return srs_error_wrap(err, "notify sip raw data");
+        }
+
+        return srs_api_response_code(w, r, 0);
+    } else if(action == "sip_unregister"){
+        if (id.empty()){
+            return srs_error_new(ERROR_GB28181_VALUE_EMPTY, "no id");
+        }
+
+        if ((err = _srs_gb28181->notify_sip_unregister(id)) != srs_success) {
+            return srs_error_wrap(err, "notify sip unregister");
+        }
+
+        return srs_api_response_code(w, r, 0);
+    } else if(action == "sip_query_catalog"){
+        if (id.empty()){
+            return srs_error_new(ERROR_GB28181_VALUE_EMPTY, "no id");
+        }
+
+        if ((err = _srs_gb28181->notify_sip_query_catalog(id)) != srs_success) {
+            return srs_error_wrap(err, "notify sip query catelog");
+        }
+
+        return srs_api_response_code(w, r, 0);
+    } else if(action == "sip_query_session"){
+        SrsJsonArray* arr = SrsJsonAny::array();
+        data->set("sessions", arr);
+
+        if ((err = _srs_gb28181->query_sip_session(id, arr)) != srs_success) {
+            return srs_error_wrap(err, "notify sip session");
+        }
+
+        return srs_api_response(w, r, obj->dumps());
+    } else {
+        return srs_error_new(ERROR_GB28181_ACTION_INVALID, "action %s", action.c_str());
     }
 }
 #endif
diff --git a/trunk/src/app/srs_app_http_api.hpp b/trunk/src/app/srs_app_http_api.hpp
index 6dbed63d5..b94dfa46c 100644
--- a/trunk/src/app/srs_app_http_api.hpp
+++ b/trunk/src/app/srs_app_http_api.hpp
@@ -249,6 +249,8 @@ public:
     virtual ~SrsGoApiGb28181();
 public:
     virtual srs_error_t serve_http(ISrsHttpResponseWriter* w, ISrsHttpMessage* r);
+private:
+    virtual srs_error_t do_serve_http(ISrsHttpResponseWriter* w, ISrsHttpMessage* r);
 };
 #endif
 
diff --git a/trunk/src/app/srs_app_rtc_conn.cpp b/trunk/src/app/srs_app_rtc_conn.cpp
index ba8b48aad..813885821 100644
--- a/trunk/src/app/srs_app_rtc_conn.cpp
+++ b/trunk/src/app/srs_app_rtc_conn.cpp
@@ -34,6 +34,8 @@ using namespace std;
 #include 
 
 #include 
+// Define macro for UDP GSO.
+// @see https://github.com/torvalds/linux/blob/master/tools/testing/selftests/net/udpgso.c
 #ifndef UDP_SEGMENT
 #define UDP_SEGMENT             103
 #endif
diff --git a/trunk/src/kernel/srs_kernel_consts.hpp b/trunk/src/kernel/srs_kernel_consts.hpp
index dc6449045..addda5696 100644
--- a/trunk/src/kernel/srs_kernel_consts.hpp
+++ b/trunk/src/kernel/srs_kernel_consts.hpp
@@ -178,6 +178,8 @@
 #define SRS_CONSTS_LOG_EXEC "EXE"
 // The rtc.
 #define SRS_CONSTS_LOG_RTC "RTC"
+// The gb28181 stream log id.
+#define SRS_CONSTS_LOG_GB28181_CASTER "GBS"
 
 ///////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////
diff --git a/trunk/src/kernel/srs_kernel_error.hpp b/trunk/src/kernel/srs_kernel_error.hpp
index c5421d640..ed41db1ba 100644
--- a/trunk/src/kernel/srs_kernel_error.hpp
+++ b/trunk/src/kernel/srs_kernel_error.hpp
@@ -363,6 +363,13 @@
 #define ERROR_GB28181_SIP_BYE_FAILED        6009
 #define ERROR_GB28181_SIP_IS_INVITING       6010
 #define ERROR_GB28181_CREATER_RTMPMUXER_FAILED 6011
+#define ERROR_GB28181_SIP_CH_OFFLINE        6012
+#define ERROR_GB28181_SIP_CH_NOTEXIST       6013
+#define ERROR_GB28181_SIP_RAW_DATA_FAILED   6014
+#define ERROR_GB28181_SIP_PRASE_FAILED      6015
+#define ERROR_GB28181_SIP_PTZ_FAILED        6016
+#define ERROR_GB28181_SIP_NOT_INVITE        6017
+#define ERROR_GB28181_SIP_PTZ_CMD_INVALID   6018
 
 ///////////////////////////////////////////////////////
 // HTTP API error.
diff --git a/trunk/src/kernel/srs_kernel_file.cpp b/trunk/src/kernel/srs_kernel_file.cpp
index 194a5e00e..95e1139fa 100644
--- a/trunk/src/kernel/srs_kernel_file.cpp
+++ b/trunk/src/kernel/srs_kernel_file.cpp
@@ -296,7 +296,7 @@ srs_error_t SrsFileReader::lseek(off_t offset, int whence, off_t* seeked)
 {
     off_t sk = _srs_lseek_fn(fd, offset, whence);
     if (sk < 0) {
-        return srs_error_new(ERROR_SYSTEM_FILE_SEEK, "seek %v failed", (int)sk);
+        return srs_error_new(ERROR_SYSTEM_FILE_SEEK, "seek %d failed", (int)sk);
     }
     
     if (seeked) {
diff --git a/trunk/src/kernel/srs_kernel_mp4.cpp b/trunk/src/kernel/srs_kernel_mp4.cpp
index 5f83d0e47..a41f27f56 100644
--- a/trunk/src/kernel/srs_kernel_mp4.cpp
+++ b/trunk/src/kernel/srs_kernel_mp4.cpp
@@ -510,7 +510,7 @@ srs_error_t SrsMp4Box::encode_header(SrsBuffer* buf)
     
     int lrsz = nb_header() - SrsMp4Box::nb_header();
     if (!buf->require(lrsz)) {
-        return srs_error_new(ERROR_MP4_BOX_REQUIRE_SPACE, "box requires %v only %d bytes", lrsz, buf->left());
+        return srs_error_new(ERROR_MP4_BOX_REQUIRE_SPACE, "box requires %d only %d bytes", lrsz, buf->left());
     }
     
     return err;
@@ -3602,19 +3602,19 @@ srs_error_t SrsMp4ES_Descriptor::decode_payload(SrsBuffer* buf)
     
     if (streamDependenceFlag) {
         if (!buf->require(2)) {
-            return srs_error_new(ERROR_MP4_BOX_REQUIRE_SPACE, "ES requires 2 only %v bytes", buf->left());
+            return srs_error_new(ERROR_MP4_BOX_REQUIRE_SPACE, "ES requires 2 only %d bytes", buf->left());
         }
         dependsOn_ES_ID = buf->read_2bytes();
     }
     
     if (URL_Flag) {
         if (!buf->require(1)) {
-            return srs_error_new(ERROR_MP4_BOX_REQUIRE_SPACE, "URLlength requires 1 only %v bytes", buf->left());
+            return srs_error_new(ERROR_MP4_BOX_REQUIRE_SPACE, "URLlength requires 1 only %d bytes", buf->left());
         }
         uint8_t URLlength = buf->read_1bytes();
         
         if (!buf->require(URLlength)) {
-            return srs_error_new(ERROR_MP4_BOX_REQUIRE_SPACE, "URL requires %d only %v bytes", URLlength, buf->left());
+            return srs_error_new(ERROR_MP4_BOX_REQUIRE_SPACE, "URL requires %d only %d bytes", URLlength, buf->left());
         }
         URLstring.resize(URLlength);
         buf->read_bytes(&URLstring[0], URLlength);
@@ -3622,7 +3622,7 @@ srs_error_t SrsMp4ES_Descriptor::decode_payload(SrsBuffer* buf)
     
     if (OCRstreamFlag) {
         if (!buf->require(2)) {
-            return srs_error_new(ERROR_MP4_BOX_REQUIRE_SPACE, "OCR requires 2 only %v bytes", buf->left());
+            return srs_error_new(ERROR_MP4_BOX_REQUIRE_SPACE, "OCR requires 2 only %d bytes", buf->left());
         }
         OCR_ES_Id = buf->read_2bytes();
     }
diff --git a/trunk/src/protocol/srs_sip_stack.cpp b/trunk/src/protocol/srs_sip_stack.cpp
index a5108fe7a..19d959723 100644
--- a/trunk/src/protocol/srs_sip_stack.cpp
+++ b/trunk/src/protocol/srs_sip_stack.cpp
@@ -45,10 +45,51 @@ using namespace std;
 
 unsigned int srs_sip_random(int min,int max)  
 {  
-    srand(int(time(0)));
+    //it is possible to duplicate data with time(0)
+    srand(unsigned(srs_update_system_time()));
     return  rand() % (max - min + 1) + min;
 } 
 
+std::string srs_sip_generate_branch()
+{
+   int rand = srs_sip_random(10000000, 99999999);
+   std::stringstream branch; 
+   branch << "SrsGbB" << rand;
+   return branch.str();
+}
+
+std::string srs_sip_generate_to_tag()
+{
+   uint32_t rand = srs_sip_random(10000000, 99999999);
+   std::stringstream branch; 
+   branch << "SrsGbT" << rand;
+   return branch.str();
+}
+
+std::string srs_sip_generate_from_tag()
+{
+   uint32_t rand = srs_sip_random(10000000, 99999999);
+   std::stringstream branch; 
+   branch << "SrsGbF" << rand;
+   return branch.str();
+}
+
+std::string srs_sip_generate_call_id()
+{
+   uint32_t rand = srs_sip_random(10000000, 99999999);
+   std::stringstream branch; 
+   branch << "2020" << rand;
+   return branch.str();
+}
+
+std::string srs_sip_generate_sn()
+{
+   uint32_t rand = srs_sip_random(10000000, 99999999);
+   std::stringstream sn; 
+   sn << rand;
+   return sn.str();
+}
+
 std::string  srs_sip_get_form_to_uri(std::string  msg)
 {
     //;tag=536961166
@@ -109,7 +150,7 @@ std::string srs_sip_get_param(std::string msg, std::string param)
 
         std::vector  v_pram = srs_string_split(value, "=");
         
-        if (v_pram.size() > 0) {
+        if (v_pram.size() > 1) {
             return v_pram.at(1);
         }
     }
@@ -156,6 +197,11 @@ SrsSipRequest::SrsSipRequest()
     sip_username = "";
     peer_ip = "";
     peer_port = 0;
+
+    chid = "";
+
+    from_realm = "";
+    to_realm = "";
 }
 
 SrsSipRequest::~SrsSipRequest()
@@ -203,43 +249,51 @@ std::string SrsSipRequest::get_cmdtype_str()
 
 void SrsSipRequest::copy(SrsSipRequest* src)
 {
-     if (!src){
-         return;
-     }
-     
-     method = src->method;
-     uri = src->uri;
-     version = src->version;
-     seq = src->seq;
-     content_type = src->content_type;
-     content_length = src->content_length;
-     call_id = src->call_id;
-     from = src->from;
-     to = src->to;
-     via = src->via;
-     from_tag = src->from_tag;
-     to_tag = src->to_tag;
-     contact = src->contact;
-     user_agent = src->user_agent;
-     branch = src->branch;
-     status = src->status;
-     expires = src->expires;
-     max_forwards = src->max_forwards;
-     www_authenticate = src->www_authenticate;
-     authorization = src->authorization;
-     cmdtype = src->cmdtype;
+    if (!src){
+        return;
+    }
+    
+    method = src->method;
+    uri = src->uri;
+    version = src->version;
+    seq = src->seq;
+    content_type = src->content_type;
+    content_length = src->content_length;
+    call_id = src->call_id;
+    from = src->from;
+    to = src->to;
+    via = src->via;
+    from_tag = src->from_tag;
+    to_tag = src->to_tag;
+    contact = src->contact;
+    user_agent = src->user_agent;
+    branch = src->branch;
+    status = src->status;
+    expires = src->expires;
+    max_forwards = src->max_forwards;
+    www_authenticate = src->www_authenticate;
+    authorization = src->authorization;
+    cmdtype = src->cmdtype;
 
-     host = src->host;
-     host_port = src->host_port;
+    host = src->host;
+    host_port = src->host_port;
 
-     serial = src->serial;
-     realm = src->realm;
-     
-     sip_auth_id = src->sip_auth_id;
-     sip_auth_pwd = src->sip_auth_pwd;
-     sip_username = src->sip_username;
-     peer_ip = src->peer_ip;
-     peer_port = src->peer_port;
+    serial = src->serial;
+    realm = src->realm;
+    
+    sip_auth_id = src->sip_auth_id;
+    sip_auth_pwd = src->sip_auth_pwd;
+    sip_username = src->sip_username;
+    peer_ip = src->peer_ip;
+    peer_port = src->peer_port;
+
+    chid = src->chid;
+
+    xml_body_map = src->xml_body_map;
+    device_list_map = src->device_list_map;
+
+    from_realm = src->from_realm;
+    to_realm  = src->to_realm;
 }
 
 SrsSipStack::SrsSipStack()
@@ -267,12 +321,158 @@ srs_error_t SrsSipStack::parse_request(SrsSipRequest** preq, const char* recv_ms
     return err;
 }
 
+srs_error_t SrsSipStack::parse_xml(std::string xml_msg, std::map &json_map)
+{
+    /*
+    
+    
+    Keepalive
+    2034
+    34020000001110000001
+    OK
+    
+    34020000001320000002
+    34020000001320000003
+    34020000001320000005
+    34020000001320000006
+    34020000001320000007
+    34020000001320000008
+    
+    
+    */
+   
+    const char* start = xml_msg.c_str();
+    const char* end = start + xml_msg.size();
+    char* p = (char*)start;
+    
+    char* value_start = NULL;
+
+    std::string xml_header;
+    int xml_layer = 0;
+
+    //std::map json_map;
+    std::map json_key;
+    while (p < end) {
+        if (p[0] == '\n'){
+            p +=1;
+            value_start = NULL;
+        } else if (p[0] == '\r' && p[1] == '\n') {
+            p +=2;
+            value_start = NULL;
+        } else if (p[0] == '<' && p[1] == '/') { // xml item end flag
+            std::string value = "";
+            if (value_start) {
+                value = std::string(value_start, p-value_start);
+            }
+            
+            //skip  get Notify
+            char *s = p;
+            while (p[0] != '>') {p++;}
+            std::string key(s, p-s);
+
+            // get DeviceList
+            std::vector vec = srs_string_split(key, " ");
+            if (vec.empty()){
+                return srs_error_new(ERROR_GB28181_SIP_PRASE_FAILED, "prase xml"); 
+            }
+
+            key = vec.at(0);
+
+            /*xml element to map
+                
+                    
+                        34020000001320000001
+                        34020000001320000002
+                    
+                
+            to map is: Notify@Info@DeviceID:34020000001320000001,34020000001320000002
+            */
+           
+            //get map key
+            std::string mkey = "";
+            for (int i = 0; i < xml_layer ; i++){
+                if (mkey.empty()) {
+                    mkey = json_key[i];
+                }else{
+                    mkey =  mkey + "@" + json_key[i];     
+                }
+            }
+ 
+            //set map value
+            if (!mkey.empty()){
+                if (json_map.find(mkey) == json_map.end()){
+                    json_map[mkey] = value;         
+                }else{
+                    json_map[mkey] = json_map[mkey] + ","+ value;
+                }    
+            }
+          
+            value_start = NULL;
+            xml_layer--;
+
+        } else if (p[0] == '<') { //  xml item begin flag
+            //skip <
+            p +=1;
+
+            // get Notify
+            char *s = p;
+            while (p[0] != '>') {p++;}
+            std::string key(s, p-s);
+
+            if (srs_string_contains(key, "?xml")){
+                //xml header
+                xml_header = key;
+                json_map["XmlHeader"] = xml_header;
+            }else {
+                // get DeviceList
+                std::vector vec = srs_string_split(key, " ");
+                if (vec.empty()){
+                    return srs_error_new(ERROR_GB28181_SIP_PRASE_FAILED, "prase xml"); 
+                }
+
+                key = vec.at(0);
+
+                //key to map by xml_layer
+                //
+                //  
+                //  
+                //
+                //json_key[0] = "Notify"
+                //json_key[1] = "info"
+                json_key[xml_layer] = key; 
+                xml_layer++;  
+            }
+
+            p +=1;
+            value_start = p;
+        } else {
+          p++;
+        }
+    }
+
+    // std::map::iterator it2;
+    // for (it2 = json_map.begin(); it2 != json_map.end(); ++it2) {
+    //     srs_trace("========%s:%s", it2->first.c_str(), it2->second.c_str());
+    // }
+
+    return srs_success;
+}
+
 srs_error_t SrsSipStack::do_parse_request(SrsSipRequest* req, const char* recv_msg)
 {
     srs_error_t err = srs_success;
 
     std::vector header_body = srs_string_split(recv_msg, SRS_RTSP_CRLFCRLF);
+    if (header_body.empty()){
+        return srs_error_new(ERROR_GB28181_SIP_PRASE_FAILED, "parse reques message"); 
+    }
+
     std::string header = header_body.at(0);
+    //Must be added SRS_RTSP_CRLFCRLF in order to handle the last line header
+    header += SRS_RTSP_CRLFCRLF; 
     std::string body = "";
 
     if (header_body.size() > 1){
@@ -296,7 +496,7 @@ srs_error_t SrsSipStack::do_parse_request(SrsSipRequest* req, const char* recv_m
             newline_start = p;
 
             if (firstline == ""){
-                firstline = oneline;
+                firstline = srs_string_replace(oneline, "\r\n", "");
                 srs_info("sip: first line=%s", firstline.c_str());
             }else{
                 size_t pos = oneline.find(":");
@@ -311,7 +511,7 @@ srs_error_t SrsSipStack::do_parse_request(SrsSipRequest* req, const char* recv_m
                         
                         if (!strcasecmp(phead, "call-id:")) {
                             std::vector vec_callid = srs_string_split(content, " ");
-                            req->call_id = vec_callid.at(0);
+                            req->call_id = vec_callid.empty() ? "" : vec_callid.at(0);
                         } 
                         else if (!strcasecmp(phead, "contact:")) {
                             req->contact = content;
@@ -327,8 +527,9 @@ srs_error_t SrsSipStack::do_parse_request(SrsSipRequest* req, const char* recv_m
                         } 
                         else if (!strcasecmp(phead, "cseq:")) {
                             std::vector vec_seq = srs_string_split(content, " ");
-                            req->seq =  strtoul(vec_seq.at(0).c_str(), NULL, 10);
-                            req->method = vec_seq.at(1);
+                            std::string seq = vec_seq.empty() ? "" : vec_seq.at(0);
+                            req->seq =  strtoul(seq.c_str(), NULL, 10);
+                            req->method = vec_seq.size() > 0 ? vec_seq.at(1) : "";
                         } 
                         else if (!strcasecmp(phead, "from:")) {
                             content = srs_string_replace(content, "sip:", "");
@@ -336,6 +537,11 @@ srs_error_t SrsSipStack::do_parse_request(SrsSipRequest* req, const char* recv_m
                             if (srs_string_contains(content, "tag")) {
                                 req->from_tag = srs_sip_get_param(content.c_str(), "tag");
                             }
+
+                            std::vector vec = srs_string_split(req->from, "@");
+                            if (vec.size() > 1){
+                                req->from_realm = vec.at(1);
+                            }
                         } 
                         else if (!strcasecmp(phead, "to:")) {
                             content = srs_string_replace(content, "sip:", "");
@@ -343,9 +549,13 @@ srs_error_t SrsSipStack::do_parse_request(SrsSipRequest* req, const char* recv_m
                             if (srs_string_contains(content, "tag")) {
                                 req->to_tag = srs_sip_get_param(content.c_str(), "tag");
                             }
+
+                            std::vector vec = srs_string_split(req->to, "@");
+                            if (vec.size() > 1){
+                                req->to_realm = vec.at(1);
+                            }
                         } 
                         else if (!strcasecmp(phead, "via:")) {
-                            //std::vector vec_via = srs_string_split(content, ";");
                             req->via = content;
                             req->branch = srs_sip_get_param(content.c_str(), "branch");
                         } 
@@ -377,28 +587,81 @@ srs_error_t SrsSipStack::do_parse_request(SrsSipRequest* req, const char* recv_m
     }
    
     std::vector  method_uri_ver = srs_string_split(firstline, " ");
+
+    if (method_uri_ver.empty()) {
+        return srs_error_new(ERROR_GB28181_SIP_PRASE_FAILED, "parse request firstline is empty"); 
+    }
+
     //respone first line text:SIP/2.0 200 OK
     if (!strcasecmp(method_uri_ver.at(0).c_str(), "sip/2.0")) {
         req->cmdtype = SrsSipCmdRespone;
         //req->method= vec_seq.at(1);
-        req->status = method_uri_ver.at(1);
+        req->status = method_uri_ver.size() > 0 ? method_uri_ver.at(1) : "";
         req->version = method_uri_ver.at(0);
         req->uri = req->from;
 
         vector str = srs_string_split(req->to, "@");
-        req->sip_auth_id = srs_string_replace(str.at(0), "sip:", "");
+        std::string ss = str.empty() ? "" : str.at(0);
+        req->sip_auth_id = srs_string_replace(ss, "sip:", "");
   
     }else {//request first line text :MESSAGE sip:34020000002000000001@3402000000 SIP/2.0
         req->cmdtype = SrsSipCmdRequest;
         req->method= method_uri_ver.at(0);
-        req->uri = method_uri_ver.at(1);
-        req->version = method_uri_ver.at(2);
+        req->uri = method_uri_ver.size() > 0 ? method_uri_ver.at(1) : "";
+        req->version = method_uri_ver.size() > 1 ? method_uri_ver.at(2) : "";
 
         vector str = srs_string_split(req->from, "@");
-        req->sip_auth_id = srs_string_replace(str.at(0), "sip:", "");
+        std::string ss = str.empty() ? "" : str.at(0);
+        req->sip_auth_id = srs_string_replace(ss, "sip:", "");
     }
 
     req->sip_username =  req->sip_auth_id;
+
+    //Content-Type: Application/MANSCDP+xml
+    if (!strcasecmp(req->content_type.c_str(),"application/manscdp+xml")){
+        std::map body_map;
+        //xml to map
+        if ((err = parse_xml(body, body_map)) != srs_success) {
+            return srs_error_wrap(err, "sip parse xml");
+        };
+        
+        //Response Cmd
+        if (body_map.find("Response") != body_map.end()){
+            std::string cmdtype = body_map["Response@CmdType"];
+            if (cmdtype == "Catalog"){
+                //Response@DeviceList@Item@DeviceID:3000001,3000002
+                std::vector vec_device_id = srs_string_split(body_map["Response@DeviceList@Item@DeviceID"], ",");
+                //Response@DeviceList@Item@Status:ON,OFF
+                std::vector vec_device_status = srs_string_split(body_map["Response@DeviceList@Item@Status"], ",");
+                 
+                //map key:devicd_id value:status 
+                for(int i=0 ; i i) {
+                        status = vec_device_status.at(i);
+                    }
+              
+                    req->device_list_map[vec_device_id.at(i)] = status;
+                }
+            }else{
+                //TODO: fixme
+                srs_trace("sip: Response cmdtype=%s not processed", cmdtype.c_str());
+            }
+        } //Notify Cmd
+        else if (body_map.find("Notify") !=  body_map.end()){
+            std::string cmdtype = body_map["Notify@CmdType"];
+            if (cmdtype == "Keepalive"){
+                //TODO: ????
+                std::vector vec_device_id = srs_string_split(body_map["Notify@Info@DeviceID"], ",");
+                for(int i=0; idevice_list_map[vec_device_id.at(i)] = "OFF";
+                }
+            }else{
+               //TODO: fixme
+               srs_trace("sip: Notify cmdtype=%s not processed", cmdtype.c_str());
+            }
+        }// end if(body_map)
+    }//end if (!strcasecmp)
    
     srs_info("sip: method=%s uri=%s version=%s cmdtype=%s", 
            req->method.c_str(), req->uri.c_str(), req->version.c_str(), req->get_cmdtype_str().c_str());
@@ -445,8 +708,12 @@ std::string SrsSipStack::get_sip_via(SrsSipRequest const *req)
 {
     std::string via = srs_string_replace(req->via, SRS_SIP_VERSION"/UDP ", "");
     std::vector vec_via = srs_string_split(via, ";");
-    std::string ip_port = vec_via.at(0);
+
+    std::string ip_port = vec_via.empty() ? "" : vec_via.at(0);
     std::vector vec_ip_port = srs_string_split(ip_port, ":");
+
+    std::string ip = vec_ip_port.empty() ? "" : vec_ip_port.at(0);
+    std::string port = vec_ip_port.size() > 1 ? vec_ip_port.at(1) : "";
     
     std::string branch, rport, received;
     if (req->branch.empty()){
@@ -455,8 +722,16 @@ std::string SrsSipStack::get_sip_via(SrsSipRequest const *req)
         branch = ";branch=" + req->branch;
     }
 
-    received = ";received=" + vec_ip_port.at(0);
-    rport = ";rport=" + vec_ip_port.at(1);
+    if (!req->peer_ip.empty()){
+        ip = req->peer_ip;
+
+        std::stringstream ss;
+        ss << req->peer_port;
+        port = ss.str();
+    }
+
+    received = ";received=" + ip;
+    rport = ";rport=" + port;
 
     return SRS_SIP_VERSION"/UDP " + ip_port + rport + received + branch;
 }
@@ -640,10 +915,12 @@ void SrsSipStack::req_invite(stringstream& ss, SrsSipRequest *req, string ip, in
     User-Agent: SRS/4.0.4(Leo)
     Content-Length: 0
     */
-
+    char _ssrc[11];
+    sprintf(_ssrc, "%010d", ssrc);
+  
     std::stringstream sdp;
     sdp << "v=0" << SRS_RTSP_CRLF
-    << "o=" << req->sip_auth_id << " 0 0 IN IP4 " << ip << SRS_RTSP_CRLF
+    << "o=" << req->serial << " 0 0 IN IP4 " << ip << SRS_RTSP_CRLF
     << "s=Play" << SRS_RTSP_CRLF
     << "c=IN IP4 " << ip << SRS_RTSP_CRLF
     << "t=0 0" << SRS_RTSP_CRLF
@@ -658,37 +935,44 @@ void SrsSipStack::req_invite(stringstream& ss, SrsSipRequest *req, string ip, in
     //<< "a=rtpmap:99 H265/90000" << SRS_RTSP_CRLF
     //<< "a=streamMode:MAIN\r\n"
     //<< "a=filesize:0\r\n"
-    << "y=" << ssrc << SRS_RTSP_CRLF;
+    << "y=" << _ssrc << SRS_RTSP_CRLF;
 
     
-    int rand = srs_sip_random(1000, 9999);
-    std::stringstream from, to, uri, branch, from_tag;
+    std::stringstream from, to, uri;
     //"INVITE sip:34020000001320000001@3402000000 SIP/2.0\r\n
-    uri << "sip:" <<  req->sip_auth_id << "@" << req->realm;
+    uri << "sip:" <<  req->chid << "@" << req->realm;
     //From: ;tag=500485%d\r\n
-    from << req->serial << "@" << req->host << ":"  << req->host_port;
-    to << req->sip_auth_id <<  "@" << req->realm;
-
+    from << req->serial << "@" << req->realm;
+    to <<  req->chid <<  "@" << req->realm;
+   
     req->from = from.str();
-    req->to   = to.str();
+    req->to = to.str();
+
+    if (!req->to_realm.empty()){
+        req->to  =  req->chid + "@" + req->to_realm;
+    }
+
+    if (!req->from_realm.empty()){
+        req->from  =  req->serial + "@" + req->from_realm;
+    }
+
     req->uri  = uri.str();
 
-    branch << "z9hG4bK3420" << rand;
-    from_tag << "51235" << rand;
-    req->branch = branch.str();
-    req->from_tag = from_tag.str();
+    req->call_id = srs_sip_generate_call_id();
+    req->branch = srs_sip_generate_branch();
+    req->from_tag = srs_sip_generate_from_tag();
 
     ss << "INVITE " << req->uri << " " << SRS_SIP_VERSION << SRS_RTSP_CRLF
     << "Via: " << SRS_SIP_VERSION << "/UDP "<< req->host << ":" << req->host_port << ";rport;branch=" << req->branch << SRS_RTSP_CRLF
     << "From: " << get_sip_from(req) << SRS_RTSP_CRLF
     << "To: " << get_sip_to(req) << SRS_RTSP_CRLF
-    << "Call-ID: 20000" << rand <call_id <seq << " INVITE" << SRS_RTSP_CRLF
     << "Content-Type: Application/SDP" << SRS_RTSP_CRLF
     << "Contact: to << ">" << SRS_RTSP_CRLF
-    << "Max-Forwards: 70" << " \r\n"
+    << "Max-Forwards: 70" << SRS_RTSP_CRLF
     << "User-Agent: " << SRS_SIP_USER_AGENT <sip_auth_id << ":" << ssrc << "," << req->serial << ":0" << SRS_RTSP_CRLF
+    << "Subject: "<< req->chid << ":" << _ssrc << "," << req->serial << ":0" << SRS_RTSP_CRLF
     << "Content-Length: " << sdp.str().length() << SRS_RTSP_CRLFCRLF
     << sdp.str();
 }
@@ -703,7 +987,7 @@ void SrsSipStack::req_401_unauthorized(std::stringstream& ss, SrsSipRequest *req
     To: ;tag=102092689
     CSeq: 1 REGISTER
     Call-ID: 1650345118
-    User-Agent: LiveGBS v200228
+    User-Agent: SRS/4.0.4(Leo)
     Contact: 
     Content-Length: 0
     WWW-Authenticate: Digest realm="3402000000",qop="auth",nonce="f1da98bd160f3e2efe954c6eedf5f75a"
@@ -737,10 +1021,10 @@ void SrsSipStack::req_ack(std::stringstream& ss, SrsSipRequest *req){
     Content-Length: 0
     */
   
-    ss << "ACK " << "sip:" <<  req->sip_auth_id << "@" << req->realm << " "<< SRS_SIP_VERSION << SRS_RTSP_CRLF
+    ss << "ACK " << "sip:" <<  req->chid << "@" << req->realm << " "<< SRS_SIP_VERSION << SRS_RTSP_CRLF
     << "Via: " << SRS_SIP_VERSION << "/UDP " << req->host << ":" << req->host_port << ";rport;branch=" << req->branch << SRS_RTSP_CRLF
-    << "From: serial << "@" << req->host + ":" << req->host_port << ">;tag=" << req->from_tag << SRS_RTSP_CRLF
-    << "To: sip_auth_id <<  "@" << req->realm << ">\r\n"
+    << "From: " << get_sip_from(req) << SRS_RTSP_CRLF
+    << "To: "<< get_sip_to(req) << SRS_RTSP_CRLF
     << "Call-ID: " << req->call_id << SRS_RTSP_CRLF
     << "CSeq: " << req->seq << " ACK"<< SRS_RTSP_CRLF
     << "Max-Forwards: 70" << SRS_RTSP_CRLF
@@ -775,15 +1059,23 @@ void SrsSipStack::req_bye(std::stringstream& ss, SrsSipRequest *req)
     */
 
     std::stringstream from, to, uri;
-    uri << "sip:" <<  req->sip_auth_id << "@" << req->realm;
+    uri << "sip:" <<  req->chid << "@" << req->realm;
     from << req->serial << "@"  << req->realm;
-    to << req->sip_auth_id <<  "@" <<  req->realm;
+    to << req->chid <<  "@" <<  req->realm;
 
     req->from = from.str();
-    req->to   = to.str();
+    req->to = to.str();
+
+    if (!req->to_realm.empty()){
+        req->to  =  req->chid + "@" + req->to_realm;
+    }
+
+    if (!req->from_realm.empty()){
+        req->from  =  req->serial + "@" + req->from_realm;
+    }
+
     req->uri  = uri.str();
 
-    int seq = srs_sip_random(22, 99);
     ss << "BYE " << req->uri << " "<< SRS_SIP_VERSION << SRS_RTSP_CRLF
     //<< "Via: "<< SRS_SIP_VERSION << "/UDP "<< req->host << ":" << req->host_port << ";rport" << branch << SRS_RTSP_CRLF
     << "Via: " << SRS_SIP_VERSION << "/UDP " << req->host << ":" << req->host_port << ";rport;branch=" << req->branch << SRS_RTSP_CRLF
@@ -791,12 +1083,243 @@ void SrsSipStack::req_bye(std::stringstream& ss, SrsSipRequest *req)
     << "To: " << get_sip_to(req) << SRS_RTSP_CRLF
     //bye callid is inivte callid
     << "Call-ID: " << req->call_id << SRS_RTSP_CRLF
-    << "CSeq: "<< seq <<" BYE" << SRS_RTSP_CRLF
+    << "CSeq: "<< req->seq <<" BYE" << SRS_RTSP_CRLF
     << "Max-Forwards: 70" << SRS_RTSP_CRLF
     << "User-Agent: " << SRS_SIP_USER_AGENT << SRS_RTSP_CRLF
     << "Content-Length: 0" << SRS_RTSP_CRLFCRLF;
    
 }
 
+void SrsSipStack::req_query_catalog(std::stringstream& ss, SrsSipRequest *req)
+{
+    /*
+    //request: sip-agent <----MESSAGE Query Catalog--- sip-server
+    MESSAGE sip:34020000001110000001@192.168.1.21:5060 SIP/2.0
+    Via: SIP/2.0/UDP 192.168.1.17:5060;rport;branch=z9hG4bK563315752
+    From: ;tag=387315752
+    To: 
+    Call-ID: 728315752
+    CSeq: 32 MESSAGE
+    Content-Type: Application/MANSCDP+xml
+    Max-Forwards: 70
+    User-Agent: SRS/4.0.20(Leo)
+    Content-Length: 162
+
+    
+    
+        Catalog
+        419315752
+        34020000001110000001
+    
+    SIP/2.0 200 OK
+    Via: SIP/2.0/UDP 192.168.1.17:5060;rport=5060;branch=z9hG4bK563315752
+    From: ;tag=387315752
+    To: ;tag=1420696981
+    Call-ID: 728315752
+    CSeq: 32 MESSAGE
+    User-Agent: Embedded Net DVR/NVR/DVS
+    Content-Length: 0
+
+    //response: sip-agent ----MESSAGE Query Catalog---> sip-server
+    SIP/2.0 200 OK
+    Via: SIP/2.0/UDP 192.168.1.17:5060;rport=5060;received=192.168.1.17;branch=z9hG4bK563315752
+    From: ;tag=387315752
+    To: ;tag=1420696981
+    CSeq: 32 MESSAGE
+    Call-ID: 728315752
+    User-Agent: SRS/4.0.20(Leo)
+    Content-Length: 0
+
+    //request: sip-agent ----MESSAGE Response Catalog---> sip-server
+    MESSAGE sip:34020000001110000001@3402000000.spvmn.cn SIP/2.0
+    Via: SIP/2.0/UDP 192.168.1.21:5060;rport;branch=z9hG4bK1681502633
+    From: ;tag=1194168247
+    To: 
+    Call-ID: 685380150
+    CSeq: 20 MESSAGE
+    Content-Type: Application/MANSCDP+xml
+    Max-Forwards: 70
+    User-Agent: Embedded Net DVR/NVR/DVS
+    Content-Length:   909
+
+    
+    
+    Catalog
+    419315752
+    34020000001110000001
+    8
+    
+    
+    34020000001320000001
+    Camera 01
+    Manufacturer
+    Camera
+    Owner
+    CivilCode
+    
        192.168.254.18
        
+    0
+    0
+    1
+    0
+    ON
+            
+    
+    34020000001320000002
+    IPCamera 02
+    Manufacturer
+    Camera
+    Owner
+    CivilCode
+    
        192.168.254.14
        
+    0
+    0
+    1
+    0
+    OFF
+            
+            
+            
+
+    */
+
+    std::stringstream xml;
+    std::string xmlbody;
+
+    xml << "" << SRS_RTSP_CRLF
+    << "" << SRS_RTSP_CRLF
+    << "Catalog" << SRS_RTSP_CRLF
+    << "" << srs_sip_generate_sn() << "" << SRS_RTSP_CRLF
+    << "" << req->sip_auth_id << "" << SRS_RTSP_CRLF
+    << "" << SRS_RTSP_CRLF;
+    xmlbody = xml.str();
+
+    std::stringstream from, to, uri;
+    //"INVITE sip:34020000001320000001@3402000000 SIP/2.0\r\n
+    uri << "sip:" <<  req->sip_auth_id << "@" << req->realm;
+    //From: ;tag=500485%d\r\n
+    from << req->serial << "@" << req->host << ":"  << req->host_port;
+    to << req->sip_auth_id <<  "@" << req->realm;
+ 
+    req->from = from.str();
+    req->to   = to.str();
+    req->uri  = uri.str();
+   
+    req->call_id = srs_sip_generate_call_id();
+    req->branch = srs_sip_generate_branch();
+    req->from_tag = srs_sip_generate_from_tag();
+
+    ss << "MESSAGE " << req->uri << " " << SRS_SIP_VERSION << SRS_RTSP_CRLF
+    << "Via: " << SRS_SIP_VERSION << "/UDP "<< req->host << ":" << req->host_port << ";rport;branch=" << req->branch << SRS_RTSP_CRLF
+    << "From: " << get_sip_from(req) << SRS_RTSP_CRLF
+    << "To: " << get_sip_to(req) << SRS_RTSP_CRLF
+    << "Call-ID: " << req->call_id << SRS_RTSP_CRLF
+    << "CSeq: " << req->seq << " MESSAGE" << SRS_RTSP_CRLF
+    << "Content-Type: Application/MANSCDP+xml" << SRS_RTSP_CRLF
+    << "Max-Forwards: 70" << SRS_RTSP_CRLF
+    << "User-Agent: " << SRS_SIP_USER_AGENT << SRS_RTSP_CRLF
+    << "Content-Length: " << xmlbody.length() << SRS_RTSP_CRLFCRLF
+    << xmlbody;
+
+}
+
+void SrsSipStack::req_ptz(std::stringstream& ss, SrsSipRequest *req, uint8_t cmd, uint8_t speed, int priority)
+{
+   
+    /*
+      
+      
+    DeviceControl  
+    11  
+    34020000001310000053  
+    A50F01021F0000D6  
+     
+    */
+
+    uint8_t ptz_cmd[8] = {0};
+    ptz_cmd[0] = SRS_SIP_PTZ_START;
+    ptz_cmd[1] = 0x0F;
+    ptz_cmd[2] = 0x01;
+    ptz_cmd[3] = cmd;
+    switch(cmd){
+        case SrsSipPtzCmdStop: // = 0x00
+            ptz_cmd[4] = 0;
+            ptz_cmd[5] = 0;
+            ptz_cmd[6] = 0;
+            break;
+        case SrsSipPtzCmdRight: // = 0x01,
+        case SrsSipPtzCmdLeft: //  = 0x02,
+            ptz_cmd[4] = speed;
+            break;
+        case SrsSipPtzCmdDown: //  = 0x04,
+        case SrsSipPtzCmdUp: //    = 0x08,
+            ptz_cmd[5] = speed;
+            break;
+        case SrsSipPtzCmdZoomOut: //  = 0x10,
+        case SrsSipPtzCmdZoomIn: //   = 0x20
+            ptz_cmd[6] = (speed & 0x0F) << 4;
+            break;
+        default:
+            return;
+    }
+
+    uint32_t check = 0;
+    for (int i = 0; i < 7; i++){
+        check += ptz_cmd[i];
+    }
+
+    ptz_cmd[7] = (uint8_t)(check % 256);
+
+    std::stringstream ss_ptzcmd;
+    for (int i = 0; i < 8; i++){
+        char hex_cmd[3] = {0};
+        sprintf(hex_cmd, "%02X", ptz_cmd[i]);
+        ss_ptzcmd << hex_cmd;
+    }
+
+    std::stringstream xml;
+    std::string xmlbody;
+
+    xml << "" << SRS_RTSP_CRLF
+    << "" << SRS_RTSP_CRLF
+    << "DeviceControl" << SRS_RTSP_CRLF
+    << "" << srs_sip_generate_sn() << "" << SRS_RTSP_CRLF
+    << "" << req->sip_auth_id << "" << SRS_RTSP_CRLF
+    << "" << ss_ptzcmd.str() << "" << SRS_RTSP_CRLF
+    << "" << SRS_RTSP_CRLF
+    << "" << priority << "" << SRS_RTSP_CRLF
+    << "" << SRS_RTSP_CRLF
+    << "" << SRS_RTSP_CRLF;
+    xmlbody = xml.str();
+
+    std::stringstream from, to, uri, call_id;
+    //"INVITE sip:34020000001320000001@3402000000 SIP/2.0\r\n
+    uri << "sip:" <<  req->sip_auth_id << "@" << req->realm;
+    //From: ;tag=500485%d\r\n
+    from << req->serial << "@" << req->host << ":"  << req->host_port;
+    to << req->sip_auth_id <<  "@" << req->realm;
+   
+    req->from = from.str();
+    req->to   = to.str();
+    req->uri  = uri.str();
+
+    req->call_id = srs_sip_generate_call_id();
+    req->branch = srs_sip_generate_branch();
+    req->from_tag = srs_sip_generate_from_tag();
+
+    ss << "MESSAGE " << req->uri << " "<< SRS_SIP_VERSION << SRS_RTSP_CRLF
+    //<< "Via: "<< SRS_SIP_VERSION << "/UDP "<< req->host << ":" << req->host_port << ";rport" << branch << SRS_RTSP_CRLF
+    << "Via: " << SRS_SIP_VERSION << "/UDP " << req->host << ":" << req->host_port << ";rport;branch=" << req->branch << SRS_RTSP_CRLF
+    << "From: " << get_sip_from(req) << SRS_RTSP_CRLF
+    << "To: " << get_sip_to(req) << SRS_RTSP_CRLF
+    << "Call-ID: " << req->call_id << SRS_RTSP_CRLF
+    << "CSeq: "<< req->seq <<" MESSAGE" << SRS_RTSP_CRLF
+    << "Content-Type: Application/MANSCDP+xml" << SRS_RTSP_CRLF
+    << "Max-Forwards: 70" << SRS_RTSP_CRLF
+    << "User-Agent: " << SRS_SIP_USER_AGENT << SRS_RTSP_CRLF
+    << "Content-Length: " << xmlbody.length() << SRS_RTSP_CRLFCRLF
+    << xmlbody;
+
+}
+
 #endif
 
diff --git a/trunk/src/protocol/srs_sip_stack.hpp b/trunk/src/protocol/srs_sip_stack.hpp
index 6e6c47d7c..a91897d18 100644
--- a/trunk/src/protocol/srs_sip_stack.hpp
+++ b/trunk/src/protocol/srs_sip_stack.hpp
@@ -30,6 +30,7 @@
 
 #include 
 #include 
+#include 
 
 #include 
 #include 
@@ -49,12 +50,24 @@ class SrsAudioFrame;
 #define SRS_SIP_VERSION "SIP/2.0"
 #define SRS_SIP_USER_AGENT RTMP_SIG_SRS_SERVER
 
+#define SRS_SIP_PTZ_START 0xA5
+
 
 enum SrsSipCmdType{
     SrsSipCmdRequest=0,
     SrsSipCmdRespone=1
 };
 
+enum SrsSipPtzCmdType{
+    SrsSipPtzCmdStop = 0x00,
+    SrsSipPtzCmdRight = 0x01,
+    SrsSipPtzCmdLeft  = 0x02,
+    SrsSipPtzCmdDown  = 0x04,
+    SrsSipPtzCmdUp    = 0x08,
+    SrsSipPtzCmdZoomIn  = 0x10,
+    SrsSipPtzCmdZoomOut   = 0x20
+};
+
 std::string srs_sip_get_utc_date();
 
 class SrsSipRequest
@@ -88,6 +101,11 @@ public:
     std::string www_authenticate;
     std::string authorization;
 
+    std::string chid;
+
+    std::map xml_body_map;
+    std::map device_list_map;
+
 public:
     std::string serial;
     std::string realm;
@@ -100,6 +118,9 @@ public:
     int host_port;
     SrsSipCmdType cmdtype;
 
+    std::string from_realm;
+    std::string to_realm;
+
 public:
     SrsRtspSdp* sdp;
     SrsRtspTransport* transport;
@@ -131,6 +152,7 @@ public:
     virtual srs_error_t parse_request(SrsSipRequest** preq, const char *recv_msg, int nb_buf);
 protected:
     virtual srs_error_t do_parse_request(SrsSipRequest* req, const char *recv_msg);
+    virtual srs_error_t parse_xml(std::string xml_msg, std::map &json_map);
 
 private:
     //response from
@@ -146,10 +168,13 @@ public:
     virtual void resp_keepalive(std::stringstream& ss, SrsSipRequest *req);
   
     //request:  request sent by the sip-server, wait for sip-agent response
-    virtual void req_invite(std::stringstream& ss, SrsSipRequest *req, std::string ip, int port, uint32_t ssrc);
+    virtual void req_invite(std::stringstream& ss, SrsSipRequest *req, std::string ip, 
+        int port, uint32_t ssrc);
     virtual void req_ack(std::stringstream& ss, SrsSipRequest *req);
     virtual void req_bye(std::stringstream& ss, SrsSipRequest *req);
     virtual void req_401_unauthorized(std::stringstream& ss, SrsSipRequest *req);
+    virtual void req_query_catalog(std::stringstream& ss, SrsSipRequest *req);
+    virtual void req_ptz(std::stringstream& ss, SrsSipRequest *req, uint8_t cmd, uint8_t speed,  int priority);
    
 };
 
diff --git a/trunk/src/service/srs_service_st.cpp b/trunk/src/service/srs_service_st.cpp
index da54a5dae..d806db24e 100644
--- a/trunk/src/service/srs_service_st.cpp
+++ b/trunk/src/service/srs_service_st.cpp
@@ -94,7 +94,7 @@ srs_error_t srs_fd_closeexec(int fd)
     int flags = fcntl(fd, F_GETFD);
     flags |= FD_CLOEXEC;
     if (fcntl(fd, F_SETFD, flags) == -1) {
-        return srs_error_new(ERROR_SOCKET_SETCLOSEEXEC, "FD_CLOEXEC fd=%v", fd);
+        return srs_error_new(ERROR_SOCKET_SETCLOSEEXEC, "FD_CLOEXEC fd=%d", fd);
     }
 
     return srs_success;
@@ -104,7 +104,7 @@ srs_error_t srs_fd_reuseaddr(int fd)
 {
     int v = 1;
     if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &v, sizeof(int)) == -1) {
-        return srs_error_new(ERROR_SOCKET_SETREUSEADDR, "SO_REUSEADDR fd=%v", fd);
+        return srs_error_new(ERROR_SOCKET_SETREUSEADDR, "SO_REUSEADDR fd=%d", fd);
     }
 
     return srs_success;
@@ -119,7 +119,7 @@ srs_error_t srs_fd_reuseport(int fd)
             srs_warn("SO_REUSEPORT disabled for crossbuild");
             return srs_success;
         #else
-            return srs_error_new(ERROR_SOCKET_SETREUSEADDR, "SO_REUSEPORT fd=%v", fd);
+            return srs_error_new(ERROR_SOCKET_SETREUSEADDR, "SO_REUSEPORT fd=%d", fd);
         #endif
     }
 #else
@@ -402,6 +402,11 @@ int srs_sendto(srs_netfd_t stfd, void *buf, int len, const struct sockaddr * to,
     return st_sendto((st_netfd_t)stfd, buf, len, to, tolen, (st_utime_t)timeout);
 }
 
+int srs_recvmsg(srs_netfd_t stfd, struct msghdr *msg, int flags, srs_utime_t timeout)
+{
+    return st_recvmsg((st_netfd_t)stfd, msg, flags, (st_utime_t)timeout);
+}
+
 int srs_sendmsg(srs_netfd_t stfd, const struct msghdr *msg, int flags, srs_utime_t timeout)
 {
     return st_sendmsg((st_netfd_t)stfd, msg, flags, (st_utime_t)timeout);
diff --git a/trunk/src/service/srs_service_st.hpp b/trunk/src/service/srs_service_st.hpp
index 784c58add..0986d553e 100644
--- a/trunk/src/service/srs_service_st.hpp
+++ b/trunk/src/service/srs_service_st.hpp
@@ -89,6 +89,7 @@ extern srs_netfd_t srs_netfd_open(int osfd);
 
 extern int srs_recvfrom(srs_netfd_t stfd, void *buf, int len, struct sockaddr *from, int *fromlen, srs_utime_t timeout);
 extern int srs_sendto(srs_netfd_t stfd, void *buf, int len, const struct sockaddr *to, int tolen, srs_utime_t timeout);
+extern int srs_recvmsg(srs_netfd_t stfd, struct msghdr *msg, int flags, srs_utime_t timeout);
 extern int srs_sendmsg(srs_netfd_t stfd, const struct msghdr *msg, int flags, srs_utime_t timeout);
 
 #if !defined(SRS_AUTO_HAS_SENDMMSG)
diff --git a/trunk/src/utest/srs_utest_amf0.cpp b/trunk/src/utest/srs_utest_amf0.cpp
index a76f22464..4b65e13c4 100644
--- a/trunk/src/utest/srs_utest_amf0.cpp
+++ b/trunk/src/utest/srs_utest_amf0.cpp
@@ -526,6 +526,8 @@ VOID TEST(ProtocolAMF0Test, ApiAnyElem)
 */
 VOID TEST(ProtocolAMF0Test, ApiAnyIO) 
 {
+    srs_error_t err;
+
     SrsAmf0Any* o = NULL;
     
     char buf[1024];
@@ -539,14 +541,15 @@ VOID TEST(ProtocolAMF0Test, ApiAnyIO)
         
         o = SrsAmf0Any::object_eof();
         SrsAutoFree(SrsAmf0Any, o);
-        
-        EXPECT_EQ(srs_success, o->read(&s));
+
+        HELPER_EXPECT_SUCCESS(o->read(&s));
         EXPECT_EQ(o->total_size(), s.pos());
         EXPECT_EQ(3, s.pos());
         
         s.skip(-1 * s.pos());
         (s.data() + s.pos())[0] = 0x01;
-        EXPECT_NE(srs_success, o->read(&s));
+
+        HELPER_EXPECT_FAILED(o->read(&s));
     }
     if (true) {
         s.skip(-1 * s.pos());
@@ -580,7 +583,7 @@ VOID TEST(ProtocolAMF0Test, ApiAnyIO)
         
         s.skip(-1 * s.pos());
         (s.data() + s.pos())[3] = 'x';
-        EXPECT_EQ(srs_success, o->read(&s));
+        HELPER_EXPECT_SUCCESS(o->read(&s));
         EXPECT_EQ(o->total_size(), s.pos());
         EXPECT_STREQ("xinlin", o->to_str().c_str());
     }
@@ -599,7 +602,7 @@ VOID TEST(ProtocolAMF0Test, ApiAnyIO)
         EXPECT_EQ(0, s.read_1bytes());
         
         s.skip(-1 * s.pos());
-        EXPECT_EQ(srs_success, o->read(&s));
+        HELPER_EXPECT_SUCCESS(o->read(&s));
         EXPECT_EQ(o->total_size(), s.pos());
         EXPECT_DOUBLE_EQ(10, o->to_number());
     }
@@ -618,7 +621,7 @@ VOID TEST(ProtocolAMF0Test, ApiAnyIO)
         EXPECT_EQ(1, s.read_1bytes());
         
         s.skip(-1 * s.pos());
-        EXPECT_EQ(srs_success, o->read(&s));
+        HELPER_EXPECT_SUCCESS(o->read(&s));
         EXPECT_EQ(o->total_size(), s.pos());
         EXPECT_TRUE(o->to_boolean());
     }
@@ -635,7 +638,7 @@ VOID TEST(ProtocolAMF0Test, ApiAnyIO)
         EXPECT_EQ(1, s.read_1bytes());
         
         s.skip(-1 * s.pos());
-        EXPECT_EQ(srs_success, o->read(&s));
+        HELPER_EXPECT_SUCCESS(o->read(&s));
         EXPECT_EQ(o->total_size(), s.pos());
         EXPECT_FALSE(o->to_boolean());
     }
@@ -654,7 +657,7 @@ VOID TEST(ProtocolAMF0Test, ApiAnyIO)
         EXPECT_EQ(5, s.read_1bytes());
         
         s.skip(-1 * s.pos());
-        EXPECT_EQ(srs_success, o->read(&s));
+        HELPER_EXPECT_SUCCESS(o->read(&s));
         EXPECT_EQ(o->total_size(), s.pos());
         EXPECT_TRUE(o->is_null());
     }
@@ -673,7 +676,7 @@ VOID TEST(ProtocolAMF0Test, ApiAnyIO)
         EXPECT_EQ(6, s.read_1bytes());
         
         s.skip(-1 * s.pos());
-        EXPECT_EQ(srs_success, o->read(&s));
+        HELPER_EXPECT_SUCCESS(o->read(&s));
         EXPECT_EQ(o->total_size(), s.pos());
         EXPECT_TRUE(o->is_undefined());
     }
@@ -838,6 +841,7 @@ VOID TEST(ProtocolAMF0Test, ApiAnyIO)
 */
 VOID TEST(ProtocolAMF0Test, ApiAnyTypeAssert)
 {
+    srs_error_t err;
     SrsAmf0Any* o = NULL;
     
     char buf[1024];
@@ -848,7 +852,7 @@ VOID TEST(ProtocolAMF0Test, ApiAnyTypeAssert)
     if (true) {
         s.skip(-1 * s.pos());
         (s.data() + s.pos())[0] = 0x12;
-        EXPECT_NE(srs_success, srs_amf0_read_any(&s, &o));
+        HELPER_EXPECT_FAILED(srs_amf0_read_any(&s, &o));
         EXPECT_TRUE(NULL == o);
         srs_freep(o);
     }