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annotate sip-out/uac_resp.c @ 155:2730ccb44549

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sip-out: initial UAC response handling
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 11 Oct 2022 23:30:00 -0800
parents sip-out/uac_out.c@e54b0a9e322f
children 0bacca1f2f7b
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1 /*
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2 * In this module we implement our handling of SIP responses in the UAC role.
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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 <sys/time.h>
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8 #include <netinet/in.h>
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9 #include <stdio.h>
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10 #include <stdint.h>
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11 #include <stdlib.h>
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12 #include <string.h>
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13 #include <strings.h>
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14 #include <syslog.h>
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15 #include "../include/gsm48_const.h"
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16 #include "../include/out_routes.h"
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17 #include "../libsip/parse.h"
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18 #include "../libsip/resp_ident.h"
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19 #include "../libsip/sdp.h"
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20 #include "../libsip/out_msg.h"
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21 #include "call.h"
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22
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23 extern struct call *find_call_by_sip_id();
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24
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25 void
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26 process_sip_response(msg, sin)
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27 struct sip_pkt_rx *msg;
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28 struct sockaddr_in *sin;
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29 {
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30 struct sip_resp_ident rid;
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31 struct call *call;
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32 int rc;
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33
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34 rc = sip_resp_extract_ident(msg, &rid);
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35 if (rc < 0) {
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36 syslog(LOG_ERR, "SIP %03u response: bad or missing %s header",
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37 msg->status_code, rid.error_field);
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38 return;
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39 }
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40 call = find_call_by_sip_id(rid.call_id);
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41 if (!call) {
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42 syslog(LOG_ERR, "SIP %03u response: unmatched Call-ID",
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43 msg->status_code);
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44 return;
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45 }
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46 if (rid.cseq_num == 1 && !strcmp(rid.cseq_method, "INVITE"))
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47 handle_invite_response(call, msg, sin);
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48 else if (rid.cseq_num == 1 && !strcmp(rid.cseq_method, "CANCEL"))
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49 handle_cancel_response(call, msg, sin);
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50 else if (rid.cseq_num == 2 && !strcmp(rid.cseq_method, "BYE"))
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51 handle_bye_response(call, msg, sin);
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52 else
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53 syslog(LOG_ERR,
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54 "UAC received %03u response with unknown CSeq %u %.32s",
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55 msg->status_code, rid.cseq_num, rid.cseq_method);
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56 }