chan_sip: Return 503 if we're out of RTP ports
If you're for some reason out of RTP ports, chan_sip would previously responde to an INVITE with a 403, which will fail the call. Now, it returns a 503, allowing the device/proxy to retry the call on a different machine. ASTERISK-28718 Change-Id: I968dcf6c1e30ecddcce397dcda36db727c83ca90
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@ -19625,6 +19625,54 @@ static int check_user(struct sip_pvt *p, struct sip_request *req, int sipmethod,
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return check_user_full(p, req, sipmethod, uri, reliable, addr, NULL);
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}
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static void send_check_user_failure_response(struct sip_pvt *p, struct sip_request *req, int res, enum xmittype reliable)
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{
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const char *response;
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switch (res) {
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case AUTH_SECRET_FAILED:
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case AUTH_USERNAME_MISMATCH:
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case AUTH_NOT_FOUND:
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case AUTH_UNKNOWN_DOMAIN:
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case AUTH_PEER_NOT_DYNAMIC:
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case AUTH_BAD_TRANSPORT:
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ast_log(LOG_NOTICE, "Failed to authenticate device %s for %s, code = %d\n",
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sip_get_header(req, "From"), sip_methods[p->method].text, res);
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response = "403 Forbidden";
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break;
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case AUTH_SESSION_LIMIT:
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/* Unexpected here, actually. As it's handled elsewhere. */
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ast_log(LOG_NOTICE, "Call limit reached for device %s for %s, code = %d\n",
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sip_get_header(req, "From"), sip_methods[p->method].text, res);
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response = "480 Temporarily Unavailable";
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break;
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case AUTH_RTP_FAILED:
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/* We don't want to send a 403 in the RTP_FAILED case.
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* The cause could be any one of:
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* - out of memory or rtp ports
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* - dtls/srtp requested but not loaded/invalid
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* Neither of them warrant a 403. A 503 makes more
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* sense, as this node is broken/overloaded. */
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ast_log(LOG_NOTICE, "RTP init failure for device %s for %s, code = %d\n",
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sip_get_header(req, "From"), sip_methods[p->method].text, res);
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response = "503 Service Unavailable";
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break;
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case AUTH_SUCCESSFUL:
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case AUTH_CHALLENGE_SENT:
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/* These should have been handled elsewhere. */
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default:
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ast_log(LOG_NOTICE, "Unexpected error for device %s for %s, code = %d\n",
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sip_get_header(req, "From"), sip_methods[p->method].text, res);
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response = "503 Service Unavailable";
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}
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if (reliable == XMIT_RELIABLE) {
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transmit_response_reliable(p, response, req);
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} else if (reliable == XMIT_UNRELIABLE) {
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transmit_response(p, response, req);
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}
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}
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static int set_message_vars_from_req(struct ast_msg *msg, struct sip_request *req)
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{
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size_t x;
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@ -19741,8 +19789,7 @@ static void receive_message(struct sip_pvt *p, struct sip_request *req, struct a
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return;
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}
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if (res < 0) { /* Something failed in authentication */
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ast_log(LOG_NOTICE, "Failed to authenticate device %s\n", sip_get_header(req, "From"));
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transmit_response(p, "403 Forbidden", req);
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send_check_user_failure_response(p, req, res, XMIT_UNRELIABLE);
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sip_scheddestroy(p, DEFAULT_TRANS_TIMEOUT);
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return;
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}
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@ -25857,8 +25904,7 @@ static int handle_request_options(struct sip_pvt *p, struct sip_request *req, st
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return 0;
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}
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if (res < 0) { /* Something failed in authentication */
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ast_log(LOG_NOTICE, "Failed to authenticate device %s\n", sip_get_header(req, "From"));
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transmit_response(p, "403 Forbidden", req);
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send_check_user_failure_response(p, req, res, XMIT_UNRELIABLE);
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sip_scheddestroy(p, DEFAULT_TRANS_TIMEOUT);
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return 0;
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}
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@ -26651,8 +26697,7 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, str
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goto request_invite_cleanup;
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}
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if (res < 0) { /* Something failed in authentication */
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ast_log(LOG_NOTICE, "Failed to authenticate device %s\n", sip_get_header(req, "From"));
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transmit_response_reliable(p, "403 Forbidden", req);
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send_check_user_failure_response(p, req, res, XMIT_RELIABLE);
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p->invitestate = INV_COMPLETED;
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sip_scheddestroy(p, DEFAULT_TRANS_TIMEOUT);
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goto request_invite_cleanup;
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@ -28375,8 +28420,7 @@ static int handle_request_publish(struct sip_pvt *p, struct sip_request *req, st
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p->lastinvite = seqno;
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return 0;
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} else if (auth_result < 0) {
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ast_log(LOG_NOTICE, "Failed to authenticate device %s\n", sip_get_header(req, "From"));
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transmit_response(p, "403 Forbidden", req);
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send_check_user_failure_response(p, req, auth_result, XMIT_UNRELIABLE);
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sip_scheddestroy(p, DEFAULT_TRANS_TIMEOUT);
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ast_string_field_set(p, theirtag, NULL);
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return 0;
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@ -28598,9 +28642,7 @@ static int handle_request_subscribe(struct sip_pvt *p, struct sip_request *req,
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if (res == AUTH_CHALLENGE_SENT) /* authpeer = NULL here */
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return 0;
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if (res != AUTH_SUCCESSFUL) {
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ast_log(LOG_NOTICE, "Failed to authenticate device %s for SUBSCRIBE\n", sip_get_header(req, "From"));
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transmit_response(p, "403 Forbidden", req);
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send_check_user_failure_response(p, req, res, XMIT_UNRELIABLE);
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pvt_set_needdestroy(p, "authentication failed");
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return 0;
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}
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