FreeCalypso > hg > themwi-system-sw
view sip-manual-out/uas.c @ 112:6aa63cf4620a
sip-in call clearing: select timeout implemented
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Wed, 28 Sep 2022 18:59:55 -0800 |
parents | dd845c4933e1 |
children | 94b5831c017f |
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/* * UAS for sip-manual-out. */ #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <strings.h> #include "../libsip/parse.h" #include "../libsip/uas_basic.h" #include "../libsip/out_msg.h" extern char call_id[]; static void bye_correct_call(req, ess, sin) struct sip_pkt_rx *req; struct uas_parse_hdrs *ess; struct sockaddr_in *sin; { struct sip_msg_out resp; int rc; printf("Received BYE for our call, responding with 200\n"); start_response_out_msg(&resp, "200 OK"); rc = add_resp_basic_headers(&resp, ess, req->req_method); if (rc < 0) { fprintf(stderr, "sending 200 response: msg length exceeded\n"); return; } out_msg_finish(&resp); sip_tx_packet(&resp, sin); } static void bye_unknown_call(req, ess, sin) struct sip_pkt_rx *req; struct uas_parse_hdrs *ess; struct sockaddr_in *sin; { struct sip_msg_out resp; int rc; printf("Received BYE for unknown call, responding with 481\n"); start_response_out_msg(&resp, "481 Call-ID not found"); rc = add_resp_basic_headers(&resp, ess, req->req_method); if (rc < 0) { fprintf(stderr, "sending 481 response: msg length exceeded\n"); return; } out_msg_finish(&resp); sip_tx_packet(&resp, sin); } static void handle_bye(req, ess, sin) struct sip_pkt_rx *req; struct uas_parse_hdrs *ess; struct sockaddr_in *sin; { if (!strcmp(ess->call_id, call_id)) bye_correct_call(req, ess, sin); else bye_unknown_call(req, ess, sin); } static void unsupported_method(req, ess, sin) struct sip_pkt_rx *req; struct uas_parse_hdrs *ess; struct sockaddr_in *sin; { struct sip_msg_out resp; int rc; printf("SIP %.16s request: unsupported method\n", req->req_method); start_response_out_msg(&resp, "501 Method not supported"); rc = add_resp_basic_headers(&resp, ess, req->req_method); if (rc < 0) { too_long: fprintf(stderr, "sending 501 error: response length exceeded\n"); return; } rc = out_msg_add_header(&resp, "Allow", "BYE"); if (rc < 0) goto too_long; out_msg_finish(&resp); sip_tx_packet(&resp, sin); } void process_sip_request(msg, sin) struct sip_pkt_rx *msg; struct sockaddr_in *sin; { struct uas_parse_hdrs ess; int rc; rc = uas_get_basic_headers(msg, &ess); if (rc < 0) { printf("SIP %.16s request: bad or missing %s header\n", msg->req_method, ess.error_field); return; } /* dispatch by method */ if (!strcmp(msg->req_method, "BYE")) handle_bye(msg, &ess, sin); else if (!strcmp(msg->req_method, "ACK")) printf("Received unexpected ACK, swallowing it\n"); else unsupported_method(msg, &ess, sin); }