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rtnetlink integrated. no more callouts to iproute2

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This commit is contained in:
Grant Limberg 2018-06-04 12:24:12 -07:00
parent 62210e57f1
commit b22405b64b
7 changed files with 566 additions and 243 deletions
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640
osdep/LinuxNetLink.cpp
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@ -54,39 +54,36 @@ LinuxNetLink::LinuxNetLink()
: _t()
, _running(false)
, _routes_ipv4()
, _rv4_m()
, _routes_ipv6()
, _rv6_m()
, _seq(0)
, _interfaces()
, _if_m()
, _fd(socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE))
, _la({0})
{
// set socket timeout to 1 sec so we're not permablocking recv() calls
struct timeval tv;
tv.tv_sec = 1;
tv.tv_usec = 0;
if(setsockopt(_fd, SOL_SOCKET, SO_RCVTIMEO, (const char*)&tv, sizeof(tv)) != 0) {
fprintf(stderr, "setsockopt failed: %s\n", strerror(errno));
}
_setSocketTimeout(_fd, 1);
_la.nl_family = AF_NETLINK;
_la.nl_pid = getpid();
_la.nl_pid = getpid()+1;
_la.nl_groups = RTMGRP_LINK|RTMGRP_IPV4_IFADDR|RTMGRP_IPV6_IFADDR|RTMGRP_IPV4_ROUTE|RTMGRP_IPV6_ROUTE|RTMGRP_NOTIFY;
if (bind(_fd, (struct sockaddr*)&_la, sizeof(_la))) {
fprintf(stderr, "Error connecting to RTNETLINK: %s\n", strerror(errno));
::exit(1);
}
_running = true;
_t = Thread::start(this);
fprintf(stderr, "Requesting IPV4 Routes\n");
_requestIPv4Routes();
Thread::sleep(10);
fprintf(stderr, "Requesting IPV6 Routes\n");
_requestIPv6Routes();
Thread::sleep(10);
fprintf(stderr, "Requesting Interface List\n");
_requestInterfaceList();
_running = true;
_t = Thread::start(this);
}
LinuxNetLink::~LinuxNetLink()
@ -97,7 +94,17 @@ LinuxNetLink::~LinuxNetLink()
::close(_fd);
}
void LinuxNetLink::threadMain() throw()
void LinuxNetLink::_setSocketTimeout(int fd, int seconds)
{
struct timeval tv;
tv.tv_sec = seconds;
tv.tv_usec = 0;
if(setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, (const char*)&tv, sizeof(tv)) != 0) {
fprintf(stderr, "setsockopt failed: %s\n", strerror(errno));
}
}
int LinuxNetLink::_doRecv(int fd)
{
char buf[8192];
char *p = NULL;
@ -106,26 +113,24 @@ void LinuxNetLink::threadMain() throw()
int rtn = 0;
p = buf;
while(_running) {
rtn = recv(_fd, p, sizeof(buf) - nll, 0);
while(true) {
rtn = recv(fd, p, sizeof(buf) - nll, 0);
if (rtn > 0) {
nlp = (struct nlmsghdr *)p;
if(nlp->nlmsg_type == NLMSG_ERROR && (nlp->nlmsg_flags & NLM_F_ACK) != NLM_F_ACK) {
fprintf(stderr, "NLMSG_ERROR\n");
struct nlmsgerr *err = (struct nlmsgerr*)NLMSG_DATA(nlp);
if (err->error != 0) {
fprintf(stderr, "rtnetlink error: %s\n", strerror(-(err->error)));
}
p = buf;
nll = 0;
continue;
break;
}
if (nlp->nlmsg_type == NLMSG_NOOP) {
fprintf(stderr, "noop\n");
continue;
break;
}
if( (nlp->nlmsg_flags & NLM_F_MULTI) == NLM_F_MULTI || (nlp->nlmsg_type == NLMSG_DONE))
@ -134,7 +139,7 @@ void LinuxNetLink::threadMain() throw()
_processMessage(nlp, nll);
p = buf;
nll = 0;
continue;
break;
}
p += rtn;
nll += rtn;
@ -144,7 +149,7 @@ void LinuxNetLink::threadMain() throw()
fprintf(stderr, "NLMSG_OVERRUN: Data lost\n");
p = buf;
nll = 0;
continue;
break;
}
nll += rtn;
@ -152,8 +157,21 @@ void LinuxNetLink::threadMain() throw()
_processMessage(nlp, nll);
p = buf;
nll = 0;
break;
} else {
break;
}
else {
}
return rtn;
}
void LinuxNetLink::threadMain() throw()
{
int rtn = 0;
while(_running) {
rtn = _doRecv(_fd);
if (rtn <= 0) {
Thread::sleep(100);
continue;
}
@ -258,6 +276,7 @@ void LinuxNetLink::_routeAdded(struct nlmsghdr *nlp)
{
char dsts[40] = {0};
char gws[40] = {0};
char srcs[40] = {0};
char ifs[16] = {0};
char ms[24] = {0};
@ -272,6 +291,9 @@ void LinuxNetLink::_routeAdded(struct nlmsghdr *nlp)
case RTA_DST:
inet_ntop(rtp->rtm_family, RTA_DATA(rtap), dsts, rtp->rtm_family == AF_INET ? 24 : 40);
break;
case RTA_SRC:
inet_ntop(rtp->rtm_family, RTA_DATA(rtap), srcs, rtp->rtm_family == AF_INET ? 24: 40);
break;
case RTA_GATEWAY:
inet_ntop(rtp->rtm_family, RTA_DATA(rtap), gws, rtp->rtm_family == AF_INET ? 24 : 40);
break;
@ -282,13 +304,14 @@ void LinuxNetLink::_routeAdded(struct nlmsghdr *nlp)
}
sprintf(ms, "%d", rtp->rtm_dst_len);
fprintf(stderr, "Route Added: dst %s/%s gw %s if %s\n", dsts, ms, gws, ifs);
fprintf(stderr, "Route Added: dst %s/%s gw %s src %s if %s\n", dsts, ms, gws, srcs, ifs);
}
void LinuxNetLink::_routeDeleted(struct nlmsghdr *nlp)
{
char dsts[40] = {0};
char gws[40] = {0};
char srcs[40] = {0};
char ifs[16] = {0};
char ms[24] = {0};
@ -303,6 +326,9 @@ void LinuxNetLink::_routeDeleted(struct nlmsghdr *nlp)
case RTA_DST:
inet_ntop(rtp->rtm_family, RTA_DATA(rtap), dsts, rtp->rtm_family == AF_INET ? 24 : 40);
break;
case RTA_SRC:
inet_ntop(rtp->rtm_family, RTA_DATA(rtap), srcs, rtp->rtm_family == AF_INET ? 24 : 40);
break;
case RTA_GATEWAY:
inet_ntop(rtp->rtm_family, RTA_DATA(rtap), gws, rtp->rtm_family == AF_INET ? 24 : 40);
break;
@ -313,7 +339,7 @@ void LinuxNetLink::_routeDeleted(struct nlmsghdr *nlp)
}
sprintf(ms, "%d", rtp->rtm_dst_len);
fprintf(stderr, "Route Deleted: dst %s/%s gw %s if %s\n", dsts, ms, gws, ifs);
fprintf(stderr, "Route Deleted: dst %s/%s gw %s src %s if %s\n", dsts, ms, gws, srcs, ifs);
}
void LinuxNetLink::_linkAdded(struct nlmsghdr *nlp)
@ -348,12 +374,15 @@ void LinuxNetLink::_linkAdded(struct nlmsghdr *nlp)
}
}
struct iface_entry &entry = _interfaces[ifip->ifi_index];
entry.index = ifip->ifi_index;
memcpy(entry.ifacename, ifname, sizeof(ifname));
memcpy(entry.mac, mac, sizeof(mac));
memcpy(entry.mac_bin, mac_bin, 6);
entry.mtu = mtu;
{
Mutex::Lock l(_if_m);
struct iface_entry &entry = _interfaces[ifip->ifi_index];
entry.index = ifip->ifi_index;
memcpy(entry.ifacename, ifname, sizeof(ifname));
memcpy(entry.mac, mac, sizeof(mac));
memcpy(entry.mac_bin, mac_bin, 6);
entry.mtu = mtu;
}
fprintf(stderr, "Link Added: %s mac: %s, mtu: %d\n", ifname, mac, mtu);
}
@ -389,13 +418,33 @@ void LinuxNetLink::_linkDeleted(struct nlmsghdr *nlp)
}
fprintf(stderr, "Link Deleted: %s mac: %s, mtu: %d\n", ifname, mac, mtu);
if(_interfaces.contains(ifip->ifi_index)) {
_interfaces.erase(ifip->ifi_index);
{
Mutex::Lock l(_if_m);
if(_interfaces.contains(ifip->ifi_index)) {
_interfaces.erase(ifip->ifi_index);
}
}
}
void LinuxNetLink::_requestIPv4Routes()
{
int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (fd == -1) {
fprintf(stderr, "Error opening RTNETLINK socket: %s\n", strerror(errno));
return;
}
_setSocketTimeout(fd);
struct sockaddr_nl la;
la.nl_family = AF_NETLINK;
la.nl_pid = getpid();
la.nl_groups = RTMGRP_IPV4_ROUTE;
if(bind(fd, (struct sockaddr*)&la, sizeof(la))) {
fprintf(stderr, "Error binding RTNETLINK: %s\n", strerror(errno));
return;
}
struct nl_route_req req;
bzero(&req, sizeof(req));
req.nl.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
@ -422,11 +471,32 @@ void LinuxNetLink::_requestIPv4Routes()
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
sendmsg(_fd, &msg, 0);
sendmsg(fd, &msg, 0);
_doRecv(fd);
close(fd);
}
void LinuxNetLink::_requestIPv6Routes()
{
int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (fd == -1) {
fprintf(stderr, "Error opening RTNETLINK socket: %s\n", strerror(errno));
return;
}
_setSocketTimeout(fd);
struct sockaddr_nl la;
la.nl_family = AF_NETLINK;
la.nl_pid = getpid();
la.nl_groups = RTMGRP_IPV6_ROUTE;
if(bind(fd, (struct sockaddr*)&la, sizeof(struct sockaddr_nl))) {
fprintf(stderr, "Error binding RTNETLINK: %s\n", strerror(errno));
return;
}
struct nl_route_req req;
bzero(&req, sizeof(req));
req.nl.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
@ -453,11 +523,32 @@ void LinuxNetLink::_requestIPv6Routes()
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
sendmsg(_fd, &msg, 0);
sendmsg(fd, &msg, 0);
_doRecv(fd);
close(fd);
}
void LinuxNetLink::_requestInterfaceList()
{
int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (fd == -1) {
fprintf(stderr, "Error opening RTNETLINK socket: %s\n", strerror(errno));
return;
}
_setSocketTimeout(fd);
struct sockaddr_nl la;
la.nl_family = AF_NETLINK;
la.nl_pid = getpid();
la.nl_groups = RTMGRP_LINK;
if(bind(fd, (struct sockaddr*)&la, sizeof(struct sockaddr_nl))) {
fprintf(stderr, "Error binding RTNETLINK: %s\n", strerror(errno));
return;
}
struct nl_if_req req;
bzero(&req, sizeof(req));
req.nl.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
@ -482,11 +573,43 @@ void LinuxNetLink::_requestInterfaceList()
iov.iov_len = req.nl.nlmsg_len;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
sendmsg(_fd, &msg, 0);
sendmsg(fd, &msg, 0);
_doRecv(fd);
close(fd);
}
void LinuxNetLink::addRoute(const InetAddress &target, const InetAddress &via, const char *ifaceName)
void LinuxNetLink::addRoute(const InetAddress &target, const InetAddress &via, const InetAddress &src, const char *ifaceName)
{
int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (fd == -1) {
fprintf(stderr, "Error opening RTNETLINK socket: %s\n", strerror(errno));
return;
}
_setSocketTimeout(fd);
struct sockaddr_nl la;
bzero(&la, sizeof(la));
la.nl_family = AF_NETLINK;
la.nl_pid = getpid();
if(bind(fd, (struct sockaddr*)&la, sizeof(struct sockaddr_nl))) {
fprintf(stderr, "Error binding RTNETLINK: %s\n", strerror(errno));
return;
}
char tmp[64];
char tmp2[64];
char tmp3[64];
fprintf(stderr, "Adding Route. target: %s via: %s src: %s iface: %s\n", target.toString(tmp), via.toString(tmp2), src.toString(tmp3), ifaceName);
if(!target) {
fprintf(stderr, "Uhhhh adding an empty route?!?!?");
return;
}
int rtl = sizeof(struct rtmsg);
struct nl_route_req req;
bzero(&req, sizeof(req));
@ -494,49 +617,54 @@ void LinuxNetLink::addRoute(const InetAddress &target, const InetAddress &via, c
struct rtattr *rtap = (struct rtattr *)req.buf;
rtap->rta_type = RTA_DST;
if (target.isV4()) {
rtap->rta_len = sizeof(struct rtattr)+sizeof(struct in_addr);
memcpy((void*)((char*)rtap+sizeof(struct rtattr)), &((struct sockaddr_in*)&target)->sin_addr, sizeof(struct in_addr));
rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
memcpy(RTA_DATA(rtap), &((struct sockaddr_in*)&target)->sin_addr, sizeof(struct in_addr));
} else {
rtap->rta_len = sizeof(struct rtattr)+sizeof(struct in6_addr);
memcpy((void*)((char*)rtap+sizeof(struct rtattr)), &((struct sockaddr_in6*)&target)->sin6_addr, sizeof(struct in6_addr));
rtap->rta_len = RTA_LENGTH(sizeof(struct in6_addr));
memcpy(RTA_DATA(rtap), &((struct sockaddr_in6*)&target)->sin6_addr, sizeof(struct in6_addr));
}
rtl += rtap->rta_len;
int interface_index = -1;
if (ifaceName != NULL) {
Hashtable<int, iface_entry>::Iterator iter(_interfaces);
int *k = NULL;
iface_entry *v = NULL;
while(iter.next(k, v)) {
if(strcmp(ifaceName, v->ifacename) == 0) {
interface_index = v->index;
break;
}
}
if (interface_index != -1) {
rtap = (struct rtattr *) (((char*)rtap) + rtap->rta_len);
rtap->rta_type = RTA_OIF;
rtap->rta_len = sizeof(struct rtattr)+sizeof(int);
memcpy(((char*)rtap)+sizeof(rtattr), &interface_index, sizeof(int));
rtl += rtap->rta_len;
}
}
if(via) {
rtap = (struct rtattr *)(((char*)rtap)+rtap->rta_len);
rtap->rta_type = RTA_GATEWAY;
if(via.isV4()) {
rtap->rta_len = sizeof(struct rtattr)+sizeof(struct in_addr);
memcpy((char*)rtap+sizeof(struct rtattr), &((struct sockaddr_in*)&via)->sin_addr, sizeof(struct in_addr));
rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
memcpy(RTA_DATA(rtap), &((struct sockaddr_in*)&via)->sin_addr, sizeof(struct in_addr));
} else {
rtap->rta_len = sizeof(struct rtattr)+sizeof(struct in6_addr);
memcpy((char*)rtap+sizeof(struct rtattr), &((struct sockaddr_in6*)&via)->sin6_addr, sizeof(struct in6_addr));
rtap->rta_len = RTA_LENGTH(sizeof(struct in6_addr));
memcpy(RTA_DATA(rtap), &((struct sockaddr_in6*)&via)->sin6_addr, sizeof(struct in6_addr));
}
rtl += rtap->rta_len;
} else if (src) {
rtap = (struct rtattr *)(((char*)rtap)+rtap->rta_len);
rtap->rta_type = RTA_SRC;
if(src.isV4()) {
rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
memcpy(RTA_DATA(rtap), &((struct sockaddr_in*)&src)->sin_addr, sizeof(struct in_addr));
} else {
rtap->rta_len = RTA_LENGTH(sizeof(struct in6_addr));
memcpy(RTA_DATA(rtap), &((struct sockaddr_in6*)&src)->sin6_addr, sizeof(struct in6_addr));
}
req.rt.rtm_src_len = src.netmaskBits();
}
if (ifaceName != NULL) {
int interface_index = _indexForInterface(ifaceName);
if (interface_index != -1) {
rtap = (struct rtattr *) (((char*)rtap) + rtap->rta_len);
rtap->rta_type = RTA_OIF;
rtap->rta_len = RTA_LENGTH(sizeof(int));
memcpy(RTA_DATA(rtap), &interface_index, sizeof(int));
rtl += rtap->rta_len;
}
}
req.nl.nlmsg_len = NLMSG_LENGTH(rtl);
req.nl.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL;
req.nl.nlmsg_flags = NLM_F_REQUEST | NLM_F_EXCL | NLM_F_CREATE | NLM_F_ACK;
req.nl.nlmsg_type = RTM_NEWROUTE;
req.nl.nlmsg_pid = 0;
req.nl.nlmsg_seq = ++_seq;
@ -546,6 +674,7 @@ void LinuxNetLink::addRoute(const InetAddress &target, const InetAddress &via, c
req.rt.rtm_scope = RT_SCOPE_UNIVERSE;
req.rt.rtm_type = RTN_UNICAST;
req.rt.rtm_dst_len = target.netmaskBits();
req.rt.rtm_flags = 0;
struct sockaddr_nl pa;
bzero(&pa, sizeof(pa));
@ -562,11 +691,41 @@ void LinuxNetLink::addRoute(const InetAddress &target, const InetAddress &via, c
iov.iov_len = req.nl.nlmsg_len;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
sendmsg(_fd, &msg, 0);
sendmsg(fd, &msg, 0);
_doRecv(fd);
close(fd);
}
void LinuxNetLink::delRoute(const InetAddress &target, const InetAddress &via, const char *ifaceName)
void LinuxNetLink::delRoute(const InetAddress &target, const InetAddress &via, const InetAddress &src, const char *ifaceName)
{
int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (fd == -1) {
fprintf(stderr, "Error opening RTNETLINK socket: %s\n", strerror(errno));
return;
}
_setSocketTimeout(fd);
struct sockaddr_nl la;
la.nl_family = AF_NETLINK;
la.nl_pid = getpid();
if(bind(fd, (struct sockaddr*)&la, sizeof(struct sockaddr_nl))) {
fprintf(stderr, "Error binding RTNETLINK: %s\n", strerror(errno));
return;
}
char tmp[64];
char tmp2[64];
char tmp3[64];
fprintf(stderr, "Removing Route. target: %s via: %s src: %s iface: %s\n", target.toString(tmp), via.toString(tmp2), src.toString(tmp3), ifaceName);
if(!target) {
fprintf(stderr, "Uhhhh deleting an empty route?!?!?");
return;
}
int rtl = sizeof(struct rtmsg);
struct nl_route_req req;
bzero(&req, sizeof(req));
@ -574,47 +733,52 @@ void LinuxNetLink::delRoute(const InetAddress &target, const InetAddress &via, c
struct rtattr *rtap = (struct rtattr *)req.buf;
rtap->rta_type = RTA_DST;
if (target.isV4()) {
rtap->rta_len = sizeof(struct rtattr)+sizeof(struct in_addr);
memcpy((void*)((char*)rtap+sizeof(struct rtattr)), &((struct sockaddr_in*)&target)->sin_addr, sizeof(struct in_addr));
rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
memcpy(RTA_DATA(rtap), &((struct sockaddr_in*)&target)->sin_addr, sizeof(struct in_addr));
} else {
rtap->rta_len = sizeof(struct rtattr)+sizeof(struct in6_addr);
memcpy((void*)((char*)rtap+sizeof(struct rtattr)), &((struct sockaddr_in6*)&target)->sin6_addr, sizeof(struct in6_addr));
rtap->rta_len = RTA_LENGTH(sizeof(struct in6_addr));
memcpy(RTA_DATA(rtap), &((struct sockaddr_in6*)&target)->sin6_addr, sizeof(struct in6_addr));
}
rtl += rtap->rta_len;
int interface_index = -1;
if (ifaceName != NULL) {
Hashtable<int, iface_entry>::Iterator iter(_interfaces);
int *k = NULL;
iface_entry *v = NULL;
while(iter.next(k, v)) {
if(strcmp(ifaceName, v->ifacename) == 0) {
interface_index = v->index;
break;
}
}
if (interface_index != -1) {
rtap = (struct rtattr *) (((char*)rtap) + rtap->rta_len);
rtap->rta_type = RTA_OIF;
rtap->rta_len = sizeof(struct rtattr)+sizeof(int);
memcpy(((char*)rtap)+sizeof(rtattr), &interface_index, sizeof(int));
rtl += rtap->rta_len;
}
}
if(via) {
rtap = (struct rtattr *)(((char*)rtap)+rtap->rta_len);
rtap->rta_type = RTA_GATEWAY;
if(via.isV4()) {
rtap->rta_len = sizeof(struct rtattr)+sizeof(struct in_addr);
memcpy((char*)rtap+sizeof(struct rtattr), &((struct sockaddr_in*)&via)->sin_addr, sizeof(struct in_addr));
rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
memcpy(RTA_DATA(rtap), &((struct sockaddr_in*)&via)->sin_addr, sizeof(struct in_addr));
} else {
rtap->rta_len = sizeof(struct rtattr)+sizeof(struct in6_addr);
memcpy((char*)rtap+sizeof(struct rtattr), &((struct sockaddr_in6*)&via)->sin6_addr, sizeof(struct in6_addr));
rtap->rta_len = RTA_LENGTH(sizeof(struct in6_addr));
memcpy(RTA_DATA(rtap), &((struct sockaddr_in6*)&via)->sin6_addr, sizeof(struct in6_addr));
}
rtl += rtap->rta_len;
} else if (src) {
rtap = (struct rtattr *)(((char*)rtap)+rtap->rta_len);
rtap->rta_type = RTA_SRC;
if(src.isV4()) {
rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
memcpy(RTA_DATA(rtap), &((struct sockaddr_in*)&src)->sin_addr, sizeof(struct in_addr));
} else {
rtap->rta_len = RTA_LENGTH(sizeof(struct in6_addr));
memcpy(RTA_DATA(rtap), &((struct sockaddr_in6*)&src)->sin6_addr, sizeof(struct in6_addr));
}
req.rt.rtm_src_len = src.netmaskBits();
}
if (ifaceName != NULL) {
int interface_index = _indexForInterface(ifaceName);
if (interface_index != -1) {
rtap = (struct rtattr *) (((char*)rtap) + rtap->rta_len);
rtap->rta_type = RTA_OIF;
rtap->rta_len = RTA_LENGTH(sizeof(int));
memcpy(RTA_DATA(rtap), &interface_index, sizeof(int));
rtl += rtap->rta_len;
}
}
req.nl.nlmsg_len = NLMSG_LENGTH(rtl);
req.nl.nlmsg_flags = NLM_F_REQUEST;
req.nl.nlmsg_type = RTM_DELROUTE;
@ -626,6 +790,7 @@ void LinuxNetLink::delRoute(const InetAddress &target, const InetAddress &via, c
req.rt.rtm_scope = RT_SCOPE_UNIVERSE;
req.rt.rtm_type = RTN_UNICAST;
req.rt.rtm_dst_len = target.netmaskBits();
req.rt.rtm_flags = 0;
struct sockaddr_nl pa;
bzero(&pa, sizeof(pa));
@ -642,73 +807,226 @@ void LinuxNetLink::delRoute(const InetAddress &target, const InetAddress &via, c
iov.iov_len = req.nl.nlmsg_len;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
sendmsg(_fd, &msg, 0);
sendmsg(fd, &msg, 0);
_doRecv(fd);
close(fd);
}
// void LinuxNetLink::addInterface(const char *iface, unsigned int mtu, const MAC &mac)
// {
// int rtl = sizeof(struct ifinfomsg);
// struct nl_if_req req;
// bzero(&req, sizeof(nl_if_req));
// struct rtattr *rtap = (struct rtattr *)req.buf;
// rtap->rta_type = IFLA_IFNAME;
// rtap->rta_len = sizeof(struct rtattr)+strlen(iface)+1;
// rtl += rtap->rta_len;
// rtap = (struct rtattr*)(((char*)rtap)+rtap->rta_len);
// rtap->rta_type = IFLA_MTU;
// rtap->rta_len = sizeof(struct rtattr)+sizeof(unsigned int);
// rtl += rtap->rta_len;
// rtap = (struct rtattr*)(((char*)rtap)+rtap->rta_len);
// rtap->rta_type = IFLA_ADDRESS;
// rtap->rta_len = sizeof(struct rtattr)+6;
// mac.copyTo(((char*)rtap)+sizeof(struct rtattr), 6);
// rtl += rtap->rta_len;
// IFLA_LINKINFO;
// req.nl.nlmsg_len = NLMSG_LENGTH(rtl);
// req.nl.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL;
// req.nl.nlmsg_type = RTM_NEWLINK;
// req.nl.nlmsg_pid = 0;
// req.nl.nlmsg_seq = ++_seq;
// req.ifa.ifi_family = AF_UNSPEC;
// req.ifa.ifi_type = 0; // TODO figure this one out
// req.ifa.ifi_index = 0;
// req.ifa.ifi_flags = IFF_UP;
// struct sockaddr_nl pa;
// bzero(&pa, sizeof(pa));
// pa.nl_family = AF_NETLINK;
// struct msghdr msg;
// bzero(&msg, sizeof(msg));
// msg.msg_name = (void*)&pa;
// msg.msg_namelen = sizeof(pa);
// struct iovec iov;
// iov.iov_base = (void*)&req.nl;
// iov.iov_len = req.nl.nlmsg_len;
// msg.msg_iov = &iov;
// msg.msg_iovlen = 1;
// sendmsg(_fd, &msg, 0);
// }
// void LinuxNetLink::removeInterface(const char *iface)
// {
// }
void LinuxNetLink::addAddress(const InetAddress &addr, const char *iface)
{
int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (fd == -1) {
fprintf(stderr, "Error opening RTNETLINK socket: %s\n", strerror(errno));
return;
}
_setSocketTimeout(fd);
struct sockaddr_nl la;
la.nl_family = AF_NETLINK;
la.nl_pid = getpid();
if (addr.isV4()) {
la.nl_groups = RTMGRP_IPV4_IFADDR;
} else {
la.nl_groups = RTMGRP_IPV6_IFADDR;
}
if(bind(fd, (struct sockaddr*)&la, sizeof(struct sockaddr_nl))) {
fprintf(stderr, "Error binding RTNETLINK: %s\n", strerror(errno));
return;
}
char tmp[128];
fprintf(stderr, "Adding IP address %s to interface %s", addr.toString(tmp), iface);
int interface_index = _indexForInterface(iface);
if (interface_index == -1) {
fprintf(stderr, "Unable to find index for interface %s\n", iface);
return;
}
int rtl = sizeof(struct ifaddrmsg);
struct nl_adr_req req;
bzero(&req, sizeof(struct nl_adr_req));
struct rtattr *rtap = (struct rtattr *)req.buf;;
if(addr.isV4()) {
struct sockaddr_in *addr_v4 = (struct sockaddr_in*)&addr;
rtap->rta_type = IFA_ADDRESS;
rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
memcpy(RTA_DATA(rtap), &addr_v4->sin_addr, sizeof(struct in_addr));
rtl += rtap->rta_len;
rtap = (struct rtattr*)(((char*)rtap) + rtap->rta_len);
rtap->rta_type = IFA_LOCAL;
rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
memcpy(RTA_DATA(rtap), &addr_v4->sin_addr, sizeof(struct in_addr));
rtl += rtap->rta_len;
InetAddress broadcast = addr.broadcast();
if(broadcast) {
rtap = (struct rtattr*)(((char*)rtap)+rtap->rta_len);
struct sockaddr_in *bcast = (struct sockaddr_in*)&broadcast;
rtap->rta_type = IFA_BROADCAST;
rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
memcpy(RTA_DATA(rtap), &bcast->sin_addr, sizeof(struct in_addr));
rtl += rtap->rta_len;
}
} else { //V6
rtap->rta_type = IFA_ADDRESS;
struct sockaddr_in6 *addr_v6 = (struct sockaddr_in6*)&addr;
rtap->rta_len = RTA_LENGTH(sizeof(struct in6_addr));
memcpy(RTA_DATA(rtap), &addr_v6->sin6_addr, sizeof(struct in6_addr));
rtl += rtap->rta_len;
}
if (iface) {
rtap = (struct rtattr*)(((char*)rtap)+rtap->rta_len);
rtap->rta_type = IFA_LABEL;
rtap->rta_len = RTA_LENGTH(strlen(iface));
memcpy(RTA_DATA(rtap), iface, strlen(iface));
rtl += rtap->rta_len;
}
req.nl.nlmsg_len = NLMSG_LENGTH(rtl);
req.nl.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL;
req.nl.nlmsg_type = RTM_NEWADDR;
req.nl.nlmsg_pid = 0;
req.nl.nlmsg_seq = ++_seq;
req.ifa.ifa_family = addr.ss_family;
req.ifa.ifa_prefixlen = addr.port();
req.ifa.ifa_flags = IFA_F_PERMANENT;
req.ifa.ifa_scope = 0;
req.ifa.ifa_index = interface_index;
struct sockaddr_nl pa;
bzero(&pa, sizeof(sockaddr_nl));
pa.nl_family = AF_NETLINK;
struct msghdr msg;
bzero(&msg, sizeof(msg));
msg.msg_name = (void*)&pa;
msg.msg_namelen = sizeof(pa);
struct iovec iov;
iov.iov_base = (void*)&req.nl;
iov.iov_len = req.nl.nlmsg_len;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
sendmsg(fd, &msg, 0);
_doRecv(fd);
close(fd);
}
void LinuxNetLink::removeAddress(const InetAddress &addr, const char *iface)
{
int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (fd == -1) {
fprintf(stderr, "Error opening RTNETLINK socket: %s\n", strerror(errno));
return;
}
_setSocketTimeout(fd);
struct sockaddr_nl la;
la.nl_family = AF_NETLINK;
la.nl_pid = getpid();
if (addr.isV4()) {
la.nl_groups = RTMGRP_IPV4_IFADDR;
} else {
la.nl_groups = RTMGRP_IPV6_IFADDR;
}
if(bind(fd, (struct sockaddr*)&la, sizeof(struct sockaddr_nl))) {
fprintf(stderr, "Error binding RTNETLINK: %s\n", strerror(errno));
return;
}
char tmp[128];
fprintf(stderr, "Removing IP address %s from interface %s", addr.toString(tmp), iface);
int interface_index = _indexForInterface(iface);
if (interface_index == -1) {
fprintf(stderr, "Unable to find index for interface %s\n", iface);
return;
}
int rtl = sizeof(struct ifaddrmsg);
struct nl_adr_req req;
bzero(&req, sizeof(struct nl_adr_req));
struct rtattr *rtap = (struct rtattr *)req.buf;
if(addr.isV4()) {
struct sockaddr_in *addr_v4 = (struct sockaddr_in*)&addr;
rtap->rta_type = IFA_ADDRESS;
rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
memcpy(RTA_DATA(rtap), &addr_v4->sin_addr, sizeof(struct in_addr));
rtl += rtap->rta_len;
rtap = (struct rtattr*)(((char*)rtap) + rtap->rta_len);
rtap->rta_type = IFA_LOCAL;
rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
memcpy(RTA_DATA(rtap), &addr_v4->sin_addr, sizeof(struct in_addr));
rtl += rtap->rta_len;
InetAddress broadcast = addr.broadcast();
if(broadcast) {
rtap = (struct rtattr*)(((char*)rtap)+rtap->rta_len);
struct sockaddr_in *bcast = (struct sockaddr_in*)&broadcast;
rtap->rta_type = IFA_BROADCAST;
rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
memcpy(RTA_DATA(rtap), &bcast->sin_addr, sizeof(struct in_addr));
rtl += rtap->rta_len;
}
} else { //V6
rtap->rta_type = IFA_ADDRESS;
struct sockaddr_in6 *addr_v6 = (struct sockaddr_in6*)&addr;
rtap->rta_len = RTA_LENGTH(sizeof(struct in6_addr));
memcpy(RTA_DATA(rtap), &addr_v6->sin6_addr, sizeof(struct in6_addr));
rtl += rtap->rta_len;
}
if (iface) {
rtap = (struct rtattr*)(((char*)rtap)+rtap->rta_len);
rtap->rta_type = IFA_LABEL;
rtap->rta_len = RTA_LENGTH(strlen(iface));
memcpy(RTA_DATA(rtap), iface, strlen(iface));
rtl += rtap->rta_len;
}
req.nl.nlmsg_len = NLMSG_LENGTH(rtl);
req.nl.nlmsg_flags = NLM_F_REQUEST;
req.nl.nlmsg_type = RTM_DELADDR;
req.nl.nlmsg_pid = 0;
req.nl.nlmsg_seq = ++_seq;
req.ifa.ifa_family = addr.ss_family;
req.ifa.ifa_prefixlen = addr.port();
req.ifa.ifa_flags = IFA_F_PERMANENT;
req.ifa.ifa_scope = 0;
req.ifa.ifa_index = interface_index;
struct sockaddr_nl pa;
bzero(&pa, sizeof(sockaddr_nl));
pa.nl_family = AF_NETLINK;
struct msghdr msg;
bzero(&msg, sizeof(msg));
msg.msg_name = (void*)&pa;
msg.msg_namelen = sizeof(pa);
struct iovec iov;
iov.iov_base = (void*)&req.nl;
iov.iov_len = req.nl.nlmsg_len;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
sendmsg(fd, &msg, 0);
_doRecv(fd);
close(fd);
}
RouteList LinuxNetLink::getIPV4Routes() const
@ -721,4 +1039,20 @@ RouteList LinuxNetLink::getIPV6Routes() const
return _routes_ipv6;
}
} // namespace ZeroTier
int LinuxNetLink::_indexForInterface(const char *iface)
{
Mutex::Lock l(_if_m);
int interface_index = -1;
Hashtable<int, iface_entry>::Iterator iter(_interfaces);
int *k = NULL;
iface_entry *v = NULL;
while(iter.next(k,v)) {
if(strcmp(iface, v->ifacename) == 0) {
interface_index = v->index;
break;
}
}
return interface_index;
}
} // namespace ZeroTier