FreeCalypso > hg > themwi-system-sw

annotate sip-out/bye_in.c @ 163:bfa9f0c0f0ac

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sip-out: handle incoming BYE as UAS
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 12 Oct 2022 14:45:31 -0800
parents sip-manual-out/bye_in.c@94b5831c017f
children
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1 /*
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2 * Here we handle incoming BYE requests in the UAS 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/uas_basic.h"
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19 #include "../libsip/out_msg.h"
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20 #include "call.h"
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21
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22 extern struct call *find_call_by_sip_id();
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23
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24 extern unsigned sip_linger_gotbye;
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25 extern unsigned sip_linger_response_err;
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26
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27 static void
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28 bye_found_call(req, ess, sin, call)
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29 struct sip_pkt_rx *req;
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30 struct uas_parse_hdrs *ess;
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31 struct sockaddr_in *sin;
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32 struct call *call;
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33 {
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34 struct sip_msg_out resp;
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35 int rc;
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36
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37 switch (call->sip_state) {
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38 case SIP_STATE_INV_SENT:
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39 case SIP_STATE_100_RCVD:
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40 case SIP_STATE_CONNECTED:
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41 call->overall_state = OVERALL_STATE_TEARDOWN;
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42 disconnect_mncc(call, GSM48_CAUSE_LOC_NET_BEYOND,
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43 GSM48_CC_CAUSE_NORM_CALL_CLEAR);
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44 disconnect_tmgw(call);
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45 call->sip_state = SIP_STATE_ENDED;
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46 sip_mark_end_time(call, sip_linger_gotbye);
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47 break;
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48 case SIP_STATE_CANCEL_SENT:
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49 case SIP_STATE_BYE_SENT:
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50 call->sip_state = SIP_STATE_ENDED;
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51 sip_mark_end_time(call, sip_linger_gotbye);
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52 break;
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53 case SIP_STATE_ACCEPT_100:
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54 case SIP_STATE_ACCEPT_200:
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55 case SIP_STATE_ENDED:
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56 break;
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57 case SIP_STATE_MSG_SIZE_ERR:
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58 return;
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59 default:
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60 syslog(LOG_CRIT,
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61 "FATAL: invalid SIP state 0x%x on incoming BYE",
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62 call->sip_state);
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63 exit(1);
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64 }
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65 /* send 200 response to BYE */
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66 start_response_out_msg(&resp, "200 OK");
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67 rc = add_resp_basic_headers(&resp, ess, req->req_method);
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68 if (rc < 0) {
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69 syslog(LOG_ERR, "msg size error responding to BYE");
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70 call->sip_state = SIP_STATE_MSG_SIZE_ERR;
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71 sip_mark_end_time(call, sip_linger_response_err);
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72 return;
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73 }
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74 out_msg_finish(&resp);
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75 sip_tx_packet(&resp, sin);
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76 }
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77
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78 static void
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79 bye_unknown_call(req, ess, sin)
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80 struct sip_pkt_rx *req;
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81 struct uas_parse_hdrs *ess;
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82 struct sockaddr_in *sin;
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83 {
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84 struct sip_msg_out resp;
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85 int rc;
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86
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87 start_response_out_msg(&resp, "481 Call-ID not found");
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88 rc = add_resp_basic_headers(&resp, ess, req->req_method);
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89 if (rc < 0)
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90 return;
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91 out_msg_finish(&resp);
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92 sip_tx_packet(&resp, sin);
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93 }
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94
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95 void
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96 handle_bye_req(req, ess, sin)
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97 struct sip_pkt_rx *req;
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98 struct uas_parse_hdrs *ess;
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99 struct sockaddr_in *sin;
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100 {
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101 struct call *call;
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102
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103 call = find_call_by_sip_id(ess->call_id);
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104 if (call)
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105 bye_found_call(req, ess, sin, call);
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106 else
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107 bye_unknown_call(req, ess, sin);
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108 }