diff options
Diffstat (limited to 'pjlib/src/pj/stun_client.c')
-rw-r--r-- | pjlib/src/pj/stun_client.c | 540 |
1 files changed, 270 insertions, 270 deletions
diff --git a/pjlib/src/pj/stun_client.c b/pjlib/src/pj/stun_client.c index c35a8541..bc9b6f35 100644 --- a/pjlib/src/pj/stun_client.c +++ b/pjlib/src/pj/stun_client.c @@ -1,270 +1,270 @@ -/* $Header: /pjproject-0.3/pjlib/src/pj/stun_client.c 6 10/14/05 12:26a Bennylp $ */
-/* $Log: /pjproject-0.3/pjlib/src/pj/stun_client.c $
- *
- * 6 10/14/05 12:26a Bennylp
- * Finished error code framework, some fixes in ioqueue, etc. Pretty
- * major.
- *
- * 5 9/17/05 10:37a Bennylp
- * Major reorganization towards version 0.3.
- *
- */
-#include <pj/stun.h>
-#include <pj/pool.h>
-#include <pj/log.h>
-#include <pj/string.h>
-#include <pj/os.h>
-#include <pj/sock_select.h>
-
-enum { MAX_REQUEST = 3 };
-static int stun_timer[] = {1600, 1600, 1600 };
-
-#define THIS_FILE "stunclient"
-#define LOG_ADDR(addr) pj_inet_ntoa(addr.sin_addr), pj_ntohs(addr.sin_port)
-
-
-PJ_DECL(pj_status_t) pj_stun_get_mapped_addr( pj_pool_factory *pf,
- int sock_cnt, pj_sock_t sock[],
- const pj_str_t *srv1, int port1,
- const pj_str_t *srv2, int port2,
- pj_sockaddr_in mapped_addr[])
-{
- pj_sockaddr_in srv_addr[2];
- int i, j, rc, send_cnt = 0;
- pj_pool_t *pool;
- struct {
- struct {
- pj_uint32_t mapped_addr;
- pj_uint32_t mapped_port;
- } srv[2];
- } *rec;
- void *out_msg;
- pj_size_t out_msg_len;
- int wait_resp = 0;
- int mapped_status = 0;
-
- PJ_CHECK_STACK();
-
- /* Create pool. */
- pool = pj_pool_create(pf, "stun%p", 1024, 1024, NULL);
- if (!pool) {
- mapped_status = PJ_STUN_ERR_MEMORY;
- return -1;
- }
-
- /* Allocate client records */
- rec = pj_pool_calloc(pool, sock_cnt, sizeof(*rec));
- if (!rec) {
- mapped_status = PJ_STUN_ERR_MEMORY;
- goto on_error;
- }
-
- /* Create the outgoing BIND REQUEST message template */
- rc = pj_stun_create_bind_req( pool, &out_msg, &out_msg_len, 0, 0);
- if (rc != 0) {
- mapped_status = -1;
- goto on_error;
- }
-
- /* Resolve servers. */
- if (pj_sockaddr_in_init(&srv_addr[0], srv1, (pj_uint16_t)port1) != 0) {
- mapped_status = PJ_STUN_ERR_RESOLVE;
- goto on_error;
- }
- if (pj_sockaddr_in_init(&srv_addr[1], srv2, (pj_uint16_t)port2) != 0) {
- mapped_status = PJ_STUN_ERR_RESOLVE;
- goto on_error;
- }
-
- /* Init mapped addresses to zero */
- pj_memset(mapped_addr, 0, sock_cnt * sizeof(pj_sockaddr_in));
-
- /* Main retransmission loop. */
- for (send_cnt=0; send_cnt<MAX_REQUEST; ++send_cnt) {
- pj_time_val next_tx, now;
- pj_fd_set_t r;
- int select_rc;
-
- PJ_LOG(4,(THIS_FILE, "STUN retransmit %d, wait_resp=%d",
- send_cnt, wait_resp));
-
- PJ_FD_ZERO(&r);
-
- /* Send messages to servers that has not given us response. */
- for (i=0; i<sock_cnt && mapped_status==0; ++i) {
- for (j=0; j<2 && mapped_status==0; ++j) {
- pj_stun_msg_hdr *msg_hdr = out_msg;
- pj_ssize_t sent_len;
-
- if (rec[i].srv[j].mapped_port != 0)
- continue;
-
- /* Modify message so that we can distinguish response. */
- msg_hdr->tsx[2] = pj_htonl(i);
- msg_hdr->tsx[3] = pj_htonl(j);
-
- /* Send! */
- sent_len = out_msg_len;
- rc = pj_sock_sendto(sock[i], out_msg, &sent_len, 0,
- (pj_sockaddr_t*)&srv_addr[j],
- sizeof(pj_sockaddr_in));
- if (sent_len != (int)out_msg_len) {
- PJ_LOG(4,(THIS_FILE,
- "Error sending STUN request to %s:%d",
- LOG_ADDR(srv_addr[j])));
- mapped_status = PJ_STUN_ERR_TRANSPORT;
- } else {
- ++wait_resp;
- }
- }
- }
-
- /* All requests sent.
- * The loop below will wait for responses until all responses have
- * been received (i.e. wait_resp==0) or timeout occurs, which then
- * we'll go to the next retransmission iteration.
- */
-
- /* Calculate time of next retransmission. */
- pj_gettimeofday(&next_tx);
- next_tx.sec += (stun_timer[send_cnt]/1000);
- next_tx.msec += (stun_timer[send_cnt]%1000);
- pj_time_val_normalize(&next_tx);
-
- for (pj_gettimeofday(&now), select_rc=1;
- mapped_status==0 && select_rc==1 && wait_resp>0 && PJ_TIME_VAL_LT(now, next_tx);
- pj_gettimeofday(&now))
- {
- pj_time_val timeout;
-
- timeout = next_tx;
- PJ_TIME_VAL_SUB(timeout, now);
-
- for (i=0; i<sock_cnt; ++i) {
- PJ_FD_SET(sock[i], &r);
- }
-
- select_rc = pj_sock_select(FD_SETSIZE, &r, NULL, NULL, &timeout);
- if (select_rc < 1)
- continue;
-
- for (i=0; i<sock_cnt; ++i) {
- int sock_idx, srv_idx;
- pj_ssize_t len;
- pj_stun_msg msg;
- pj_sockaddr_in addr;
- int addrlen = sizeof(addr);
- pj_stun_mapped_addr_attr *attr;
- char recv_buf[128];
-
- if (!PJ_FD_ISSET(sock[i], &r))
- continue;
-
- len = sizeof(recv_buf);
- pj_sock_recvfrom( sock[i], recv_buf,
- &len, 0,
- (pj_sockaddr_t*)&addr,
- &addrlen);
-
- --wait_resp;
-
- if (len < 1) {
- mapped_status = PJ_STUN_ERR_TRANSPORT;
- continue;
- }
-
- if (pj_stun_parse_msg(recv_buf, len, &msg) != 0) {
- PJ_LOG(4,(THIS_FILE,
- "Error parsing STUN response from %s:%d",
- LOG_ADDR(addr)));
- mapped_status = PJ_STUN_ERR_INVALID_MSG;
- continue;
- }
-
- sock_idx = pj_ntohl(msg.hdr->tsx[2]);
- srv_idx = pj_ntohl(msg.hdr->tsx[3]);
-
- if (sock_idx<0 || sock_idx>=sock_cnt || srv_idx<0 || srv_idx>=2) {
- PJ_LOG(4,(THIS_FILE,
- "Invalid transaction ID from %s:%d",
- LOG_ADDR(addr)));
- mapped_status = PJ_STUN_ERR_INVALID_MSG;
- continue;
- }
-
- if (pj_ntohs(msg.hdr->type) != PJ_STUN_BINDING_RESPONSE) {
- PJ_LOG(4,(THIS_FILE,
- "Non binding response %d from %s:%d",
- pj_ntohs(msg.hdr->type), LOG_ADDR(addr)));
- mapped_status = PJ_STUN_ERR_INVALID_MSG;
- continue;
- }
-
- if (pj_stun_msg_find_attr(&msg, PJ_STUN_ATTR_ERROR_CODE) != NULL) {
- PJ_LOG(4,(THIS_FILE,
- "Got STUN error attribute from %s:%d",
- LOG_ADDR(addr)));
- mapped_status = PJ_STUN_ERR_INVALID_MSG;
- continue;
- }
-
- attr = (void*)pj_stun_msg_find_attr(&msg, PJ_STUN_ATTR_MAPPED_ADDR);
- if (!attr) {
- PJ_LOG(4,(THIS_FILE,
- "No mapped address in response from %s:%d",
- LOG_ADDR(addr)));
- mapped_status = PJ_STUN_ERR_INVALID_MSG;
- continue;
- }
-
- rec[sock_idx].srv[srv_idx].mapped_addr = attr->addr;
- rec[sock_idx].srv[srv_idx].mapped_port = attr->port;
- }
- }
-
- /* The best scenario is if all requests have been replied.
- * Then we don't need to go to the next retransmission iteration.
- */
- if (wait_resp <= 0)
- break;
- }
-
- for (i=0; i<sock_cnt && mapped_status==0; ++i) {
- if (rec[i].srv[0].mapped_addr == rec[i].srv[1].mapped_addr &&
- rec[i].srv[0].mapped_port == rec[i].srv[1].mapped_port)
- {
- mapped_addr[i].sin_family = PJ_AF_INET;
- mapped_addr[i].sin_addr.s_addr = rec[i].srv[0].mapped_addr;
- mapped_addr[i].sin_port = (pj_uint16_t)rec[i].srv[0].mapped_port;
-
- if (rec[i].srv[0].mapped_addr == 0 || rec[i].srv[0].mapped_port == 0) {
- mapped_status = PJ_STUN_ERR_NO_RESPONSE;
- }
- } else {
- mapped_status = PJ_STUN_ERR_SYMETRIC;
- }
- }
-
- pj_pool_release(pool);
-
- return mapped_status;
-
-on_error:
- if (pool) pj_pool_release(pool);
- return -1;
-}
-
-PJ_DEF(const char*) pj_stun_get_err_msg(pj_status_t status)
-{
- switch (status) {
- case 0: return "No error";
- case -1: return "General error";
- case PJ_STUN_ERR_MEMORY: return "Memory allocation failed";
- case PJ_STUN_ERR_RESOLVE: return "Invalid IP or unable to resolve STUN server";
- case PJ_STUN_ERR_TRANSPORT: return "Unable to contact STUN server";
- case PJ_STUN_ERR_INVALID_MSG: return "Invalid response from STUN server";
- case PJ_STUN_ERR_NO_RESPONSE: return "No response from STUN server";
- case PJ_STUN_ERR_SYMETRIC: return "Different mappings are returned from servers";
- }
- return "Unknown error";
-}
+/* $Header: /pjproject-0.3/pjlib/src/pj/stun_client.c 6 10/14/05 12:26a Bennylp $ */ +/* $Log: /pjproject-0.3/pjlib/src/pj/stun_client.c $ + * + * 6 10/14/05 12:26a Bennylp + * Finished error code framework, some fixes in ioqueue, etc. Pretty + * major. + * + * 5 9/17/05 10:37a Bennylp + * Major reorganization towards version 0.3. + * + */ +#include <pj/stun.h> +#include <pj/pool.h> +#include <pj/log.h> +#include <pj/string.h> +#include <pj/os.h> +#include <pj/sock_select.h> + +enum { MAX_REQUEST = 3 }; +static int stun_timer[] = {1600, 1600, 1600 }; + +#define THIS_FILE "stunclient" +#define LOG_ADDR(addr) pj_inet_ntoa(addr.sin_addr), pj_ntohs(addr.sin_port) + + +PJ_DECL(pj_status_t) pj_stun_get_mapped_addr( pj_pool_factory *pf, + int sock_cnt, pj_sock_t sock[], + const pj_str_t *srv1, int port1, + const pj_str_t *srv2, int port2, + pj_sockaddr_in mapped_addr[]) +{ + pj_sockaddr_in srv_addr[2]; + int i, j, rc, send_cnt = 0; + pj_pool_t *pool; + struct { + struct { + pj_uint32_t mapped_addr; + pj_uint32_t mapped_port; + } srv[2]; + } *rec; + void *out_msg; + pj_size_t out_msg_len; + int wait_resp = 0; + int mapped_status = 0; + + PJ_CHECK_STACK(); + + /* Create pool. */ + pool = pj_pool_create(pf, "stun%p", 1024, 1024, NULL); + if (!pool) { + mapped_status = PJ_STUN_ERR_MEMORY; + return -1; + } + + /* Allocate client records */ + rec = pj_pool_calloc(pool, sock_cnt, sizeof(*rec)); + if (!rec) { + mapped_status = PJ_STUN_ERR_MEMORY; + goto on_error; + } + + /* Create the outgoing BIND REQUEST message template */ + rc = pj_stun_create_bind_req( pool, &out_msg, &out_msg_len, 0, 0); + if (rc != 0) { + mapped_status = -1; + goto on_error; + } + + /* Resolve servers. */ + if (pj_sockaddr_in_init(&srv_addr[0], srv1, (pj_uint16_t)port1) != 0) { + mapped_status = PJ_STUN_ERR_RESOLVE; + goto on_error; + } + if (pj_sockaddr_in_init(&srv_addr[1], srv2, (pj_uint16_t)port2) != 0) { + mapped_status = PJ_STUN_ERR_RESOLVE; + goto on_error; + } + + /* Init mapped addresses to zero */ + pj_memset(mapped_addr, 0, sock_cnt * sizeof(pj_sockaddr_in)); + + /* Main retransmission loop. */ + for (send_cnt=0; send_cnt<MAX_REQUEST; ++send_cnt) { + pj_time_val next_tx, now; + pj_fd_set_t r; + int select_rc; + + PJ_LOG(4,(THIS_FILE, "STUN retransmit %d, wait_resp=%d", + send_cnt, wait_resp)); + + PJ_FD_ZERO(&r); + + /* Send messages to servers that has not given us response. */ + for (i=0; i<sock_cnt && mapped_status==0; ++i) { + for (j=0; j<2 && mapped_status==0; ++j) { + pj_stun_msg_hdr *msg_hdr = out_msg; + pj_ssize_t sent_len; + + if (rec[i].srv[j].mapped_port != 0) + continue; + + /* Modify message so that we can distinguish response. */ + msg_hdr->tsx[2] = pj_htonl(i); + msg_hdr->tsx[3] = pj_htonl(j); + + /* Send! */ + sent_len = out_msg_len; + rc = pj_sock_sendto(sock[i], out_msg, &sent_len, 0, + (pj_sockaddr_t*)&srv_addr[j], + sizeof(pj_sockaddr_in)); + if (sent_len != (int)out_msg_len) { + PJ_LOG(4,(THIS_FILE, + "Error sending STUN request to %s:%d", + LOG_ADDR(srv_addr[j]))); + mapped_status = PJ_STUN_ERR_TRANSPORT; + } else { + ++wait_resp; + } + } + } + + /* All requests sent. + * The loop below will wait for responses until all responses have + * been received (i.e. wait_resp==0) or timeout occurs, which then + * we'll go to the next retransmission iteration. + */ + + /* Calculate time of next retransmission. */ + pj_gettimeofday(&next_tx); + next_tx.sec += (stun_timer[send_cnt]/1000); + next_tx.msec += (stun_timer[send_cnt]%1000); + pj_time_val_normalize(&next_tx); + + for (pj_gettimeofday(&now), select_rc=1; + mapped_status==0 && select_rc==1 && wait_resp>0 && PJ_TIME_VAL_LT(now, next_tx); + pj_gettimeofday(&now)) + { + pj_time_val timeout; + + timeout = next_tx; + PJ_TIME_VAL_SUB(timeout, now); + + for (i=0; i<sock_cnt; ++i) { + PJ_FD_SET(sock[i], &r); + } + + select_rc = pj_sock_select(FD_SETSIZE, &r, NULL, NULL, &timeout); + if (select_rc < 1) + continue; + + for (i=0; i<sock_cnt; ++i) { + int sock_idx, srv_idx; + pj_ssize_t len; + pj_stun_msg msg; + pj_sockaddr_in addr; + int addrlen = sizeof(addr); + pj_stun_mapped_addr_attr *attr; + char recv_buf[128]; + + if (!PJ_FD_ISSET(sock[i], &r)) + continue; + + len = sizeof(recv_buf); + pj_sock_recvfrom( sock[i], recv_buf, + &len, 0, + (pj_sockaddr_t*)&addr, + &addrlen); + + --wait_resp; + + if (len < 1) { + mapped_status = PJ_STUN_ERR_TRANSPORT; + continue; + } + + if (pj_stun_parse_msg(recv_buf, len, &msg) != 0) { + PJ_LOG(4,(THIS_FILE, + "Error parsing STUN response from %s:%d", + LOG_ADDR(addr))); + mapped_status = PJ_STUN_ERR_INVALID_MSG; + continue; + } + + sock_idx = pj_ntohl(msg.hdr->tsx[2]); + srv_idx = pj_ntohl(msg.hdr->tsx[3]); + + if (sock_idx<0 || sock_idx>=sock_cnt || srv_idx<0 || srv_idx>=2) { + PJ_LOG(4,(THIS_FILE, + "Invalid transaction ID from %s:%d", + LOG_ADDR(addr))); + mapped_status = PJ_STUN_ERR_INVALID_MSG; + continue; + } + + if (pj_ntohs(msg.hdr->type) != PJ_STUN_BINDING_RESPONSE) { + PJ_LOG(4,(THIS_FILE, + "Non binding response %d from %s:%d", + pj_ntohs(msg.hdr->type), LOG_ADDR(addr))); + mapped_status = PJ_STUN_ERR_INVALID_MSG; + continue; + } + + if (pj_stun_msg_find_attr(&msg, PJ_STUN_ATTR_ERROR_CODE) != NULL) { + PJ_LOG(4,(THIS_FILE, + "Got STUN error attribute from %s:%d", + LOG_ADDR(addr))); + mapped_status = PJ_STUN_ERR_INVALID_MSG; + continue; + } + + attr = (void*)pj_stun_msg_find_attr(&msg, PJ_STUN_ATTR_MAPPED_ADDR); + if (!attr) { + PJ_LOG(4,(THIS_FILE, + "No mapped address in response from %s:%d", + LOG_ADDR(addr))); + mapped_status = PJ_STUN_ERR_INVALID_MSG; + continue; + } + + rec[sock_idx].srv[srv_idx].mapped_addr = attr->addr; + rec[sock_idx].srv[srv_idx].mapped_port = attr->port; + } + } + + /* The best scenario is if all requests have been replied. + * Then we don't need to go to the next retransmission iteration. + */ + if (wait_resp <= 0) + break; + } + + for (i=0; i<sock_cnt && mapped_status==0; ++i) { + if (rec[i].srv[0].mapped_addr == rec[i].srv[1].mapped_addr && + rec[i].srv[0].mapped_port == rec[i].srv[1].mapped_port) + { + mapped_addr[i].sin_family = PJ_AF_INET; + mapped_addr[i].sin_addr.s_addr = rec[i].srv[0].mapped_addr; + mapped_addr[i].sin_port = (pj_uint16_t)rec[i].srv[0].mapped_port; + + if (rec[i].srv[0].mapped_addr == 0 || rec[i].srv[0].mapped_port == 0) { + mapped_status = PJ_STUN_ERR_NO_RESPONSE; + } + } else { + mapped_status = PJ_STUN_ERR_SYMETRIC; + } + } + + pj_pool_release(pool); + + return mapped_status; + +on_error: + if (pool) pj_pool_release(pool); + return -1; +} + +PJ_DEF(const char*) pj_stun_get_err_msg(pj_status_t status) +{ + switch (status) { + case 0: return "No error"; + case -1: return "General error"; + case PJ_STUN_ERR_MEMORY: return "Memory allocation failed"; + case PJ_STUN_ERR_RESOLVE: return "Invalid IP or unable to resolve STUN server"; + case PJ_STUN_ERR_TRANSPORT: return "Unable to contact STUN server"; + case PJ_STUN_ERR_INVALID_MSG: return "Invalid response from STUN server"; + case PJ_STUN_ERR_NO_RESPONSE: return "No response from STUN server"; + case PJ_STUN_ERR_SYMETRIC: return "Different mappings are returned from servers"; + } + return "Unknown error"; +} |