FreeCalypso > hg > themwi-system-sw

annotate sip-in/sip_uas.c @ 98:423610bb2c9e

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sip-in: send MDCX to TMGW to connect the call through
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 25 Sep 2022 20:28:54 -0800
parents a9944b66dcc5
children 0d6435808bcd
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Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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2 * Basic UAS functions for themwi-sip-in.
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3 */
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4
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5 #include <sys/types.h>
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6 #include <sys/socket.h>
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7 #include <netinet/in.h>
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8 #include <stdio.h>
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9 #include <stdlib.h>
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10 #include <string.h>
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11 #include <strings.h>
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12 #include <syslog.h>
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13 #include "../libsip/parse.h"
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14 #include "../libsip/uas_basic.h"
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15 #include "../libsip/out_msg.h"
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16
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17 static void
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18 unsupported_method(req, ess, sin)
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19 struct sip_pkt_rx *req;
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20 struct uas_parse_hdrs *ess;
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21 struct sockaddr_in *sin;
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22 {
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23 struct sip_msg_out resp;
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24 int rc;
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25
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26 start_response_out_msg(&resp, "501 Method not supported");
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27 rc = add_resp_basic_headers(&resp, ess, req->req_method);
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28 if (rc < 0) {
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29 too_long: syslog(LOG_ERR, "sending 501 error: response length exceeded");
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30 return;
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31 }
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32 rc = out_msg_add_header(&resp, "Allow", "INVITE,ACK,CANCEL,BYE");
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33 if (rc < 0)
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34 goto too_long;
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35 out_msg_finish(&resp);
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36 sip_tx_packet(&resp, sin);
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37 }
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38
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39 void
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40 process_sip_request(msg, sin)
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41 struct sip_pkt_rx *msg;
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42 struct sockaddr_in *sin;
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43 {
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44 struct uas_parse_hdrs ess;
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45 int rc;
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46
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47 rc = uas_get_basic_headers(msg, &ess);
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48 if (rc < 0) {
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49 syslog(LOG_ERR, "SIP %.16s request: bad or missing %s header",
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50 msg->req_method, ess.error_field);
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51 return;
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52 }
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53 /* dispatch by method */
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54 if (!strcmp(msg->req_method, "INVITE"))
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55 handle_sip_invite(msg, &ess, sin);
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56 else if (!strcmp(msg->req_method, "ACK"))
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57 handle_sip_ack(msg, &ess, sin);
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58 else if (!strcmp(msg->req_method, "CANCEL"))
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59 handle_sip_cancel(msg, &ess, sin);
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60 else if (!strcmp(msg->req_method, "BYE"))
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61 handle_sip_bye(msg, &ess, sin);
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62 else
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63 unsupported_method(msg, &ess, sin);
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64 }