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Support multiple simultaneous clients

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* replace cqb with a dns request buffer with separate queues for each cnx id
* ensure we respond to the addr from the DNS request we popped from queue
This commit is contained in:
Jop Zitman 2024-12-17 17:15:32 +08:00
parent 0006c48e4b
commit 2038af95e8
10 changed files with 380 additions and 73 deletions
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10
src/slipstream_client.c
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@ -26,7 +26,7 @@
char* client_domain_name = NULL;
size_t client_domain_name_len = 0;
ssize_t client_encode_segment(dns_packet_t* packet, size_t* packet_len, const unsigned char* src_buf, size_t src_buf_len) {
ssize_t client_encode_segment(picoquic_quic_t* quic, dns_packet_t* packet, size_t* packet_len, const unsigned char* src_buf, size_t src_buf_len) {
edns0_opt_t opt;
dns_answer_t edns;
@ -66,12 +66,12 @@ ssize_t client_encode_segment(dns_packet_t* packet, size_t* packet_len, const un
return 0;
}
ssize_t client_encode(unsigned char** dest_buf, const unsigned char* src_buf, size_t src_buf_len, size_t* segment_len) {
ssize_t client_encode(picoquic_quic_t* quic, picoquic_cnx_t* last_cnx, unsigned char** dest_buf, const unsigned char* src_buf, size_t src_buf_len, size_t* segment_len, struct sockaddr_storage* peer_addr) {
// optimize path for single segment
if (src_buf_len <= *segment_len) {
size_t packet_len = MAX_DNS_QUERY_SIZE;
unsigned char* packet = malloc(packet_len);
const ssize_t ret = client_encode_segment((dns_packet_t*) packet, &packet_len, src_buf, src_buf_len);
const ssize_t ret = client_encode_segment(quic, (dns_packet_t*) packet, &packet_len, src_buf, src_buf_len);
if (ret < 0) {
free(packet);
return -1;
@ -90,7 +90,7 @@ ssize_t client_encode(unsigned char** dest_buf, const unsigned char* src_buf, si
size_t first_packet_len = 0;
for (size_t i = 0; i < num_segments; i++) {
size_t packet_len = MAX_DNS_QUERY_SIZE;
const ssize_t ret = client_encode_segment((dns_packet_t*) current_packet, &packet_len, segment, *segment_len);
const ssize_t ret = client_encode_segment(quic, (dns_packet_t*) current_packet, &packet_len, segment, *segment_len);
if (ret < 0) {
free(packets);
return -1;
@ -117,7 +117,7 @@ ssize_t client_encode(unsigned char** dest_buf, const unsigned char* src_buf, si
return current_packet - packets;
}
ssize_t client_decode(const unsigned char** dest_buf, const unsigned char* src_buf, size_t src_buf_len, struct sockaddr_storage* from, struct sockaddr_storage* dest) {
ssize_t client_decode(picoquic_quic_t* quic, unsigned char** dest_buf, const unsigned char* src_buf, size_t src_buf_len, struct sockaddr_storage* peer_addr) {
*dest_buf = NULL;
size_t bufsize = DNS_DECODEBUF_4K * sizeof(dns_decoded_t);