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annotate sip-out/uac_resp.c @ 161:c0a391f28e91

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sip-out: handle responses to UAC BYE
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 12 Oct 2022 13:38:40 -0800
parents 0bacca1f2f7b
children 83022d408071
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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 "call.h"
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20
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21 extern struct call *find_call_by_sip_id();
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22
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23 extern unsigned sip_linger_bye_out_ok;
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24 extern unsigned sip_linger_bye_out_err;
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26 void
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27 handle_bye_response(call, msg, sin)
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28 struct call *call;
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29 struct sip_pkt_rx *msg;
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30 struct sockaddr_in *sin;
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31 {
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32 if (msg->status_code != 200)
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33 syslog(LOG_ERR, "non-200 response to BYE: %.64s",
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34 msg->status_str);
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35 if (msg->status_code < 200)
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36 return;
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37 if (call->sip_state == SIP_STATE_BYE_SENT) {
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38 call->sip_state = SIP_STATE_ENDED;
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39 if (msg->status_code <= 299)
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40 sip_mark_end_time(call, sip_linger_bye_out_ok);
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41 else
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42 sip_mark_end_time(call, sip_linger_bye_out_err);
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43 }
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44 }
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45
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46 void
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47 process_sip_response(msg, sin)
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48 struct sip_pkt_rx *msg;
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49 struct sockaddr_in *sin;
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50 {
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51 struct sip_resp_ident rid;
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52 struct call *call;
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53 int rc;
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54
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55 rc = sip_resp_extract_ident(msg, &rid);
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56 if (rc < 0) {
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57 syslog(LOG_ERR, "SIP %03u response: bad or missing %s header",
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58 msg->status_code, rid.error_field);
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59 return;
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60 }
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61 call = find_call_by_sip_id(rid.call_id);
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62 if (!call) {
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63 syslog(LOG_ERR, "SIP %03u response: unmatched Call-ID",
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64 msg->status_code);
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65 return;
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66 }
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67 if (rid.cseq_num == 1 && !strcmp(rid.cseq_method, "INVITE"))
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68 handle_invite_response(call, msg, sin);
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69 else if (rid.cseq_num == 1 && !strcmp(rid.cseq_method, "CANCEL"))
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70 handle_cancel_response(call, msg, sin);
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71 else if (rid.cseq_num == 2 && !strcmp(rid.cseq_method, "BYE"))
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72 handle_bye_response(call, msg, sin);
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73 else
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74 syslog(LOG_ERR,
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75 "UAC received %03u response with unknown CSeq %u %.32s",
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76 msg->status_code, rid.cseq_num, rid.cseq_method);
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77 }