FreeCalypso > hg > themwi-system-sw

annotate sip-in/bye_out.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 4e16aeafbfbf
children
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1 /*
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2 * In this module we implement our UAC functionality of sending BYE.
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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 <arpa/inet.h>
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10 #include <stdio.h>
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11 #include <stdint.h>
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12 #include <stdlib.h>
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13 #include <string.h>
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14 #include <strings.h>
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15 #include <syslog.h>
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16 #include "../libsip/parse.h"
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17 #include "../libsip/resp_ident.h"
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18 #include "../libsip/out_msg.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 struct in_addr sip_bind_ip;
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24 extern unsigned sip_bind_port;
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25 extern unsigned max_forwards;
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26 extern unsigned sip_linger_acked;
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27 extern unsigned sip_linger_error;
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28
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29 fill_bye_out_msg(msg, call)
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30 struct sip_msg_out *msg;
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31 struct call *call;
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32 {
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33 char strbuf[80];
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34 int rc;
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35
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36 rc = start_request_out_msg_urilen(msg, "BYE", call->from_uri,
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37 call->from_uri_len);
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38 if (rc < 0)
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39 return rc;
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40 sprintf(strbuf, "SIP/2.0/UDP %s:%u",
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41 inet_ntoa(sip_bind_ip), sip_bind_port);
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42 rc = out_msg_add_header(msg, "Via", strbuf);
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43 if (rc < 0)
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44 return rc;
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45 rc = out_msg_add_header(msg, "From", call->invite_to);
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46 if (rc < 0)
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47 return rc;
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48 rc = out_msg_add_header(msg, "To", call->invite_from);
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49 if (rc < 0)
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50 return rc;
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51 rc = out_msg_add_header(msg, "Call-ID", call->sip_call_id);
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52 if (rc < 0)
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53 return rc;
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54 rc = out_msg_add_header(msg, "CSeq", "1 BYE");
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55 if (rc < 0)
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56 return rc;
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57 sprintf(strbuf, "%u", max_forwards);
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58 rc = out_msg_add_header(msg, "Max-Forwards", strbuf);
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59 if (rc < 0)
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60 return rc;
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61 out_msg_finish(msg);
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62 return 0;
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63 }
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64
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65 void
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66 initiate_bye(call)
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67 struct call *call;
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68 {
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69 struct sip_msg_out msg;
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70 int rc;
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71
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72 rc = fill_bye_out_msg(&msg, call);
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73 if (rc < 0) {
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74 syslog(LOG_ERR, "outgoing BYE request msg length exceeded");
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75 call->sip_state = SIP_STATE_MSG_SIZE_ERR;
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76 sip_mark_end_time(call, sip_linger_error);
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77 transition_dead_sip(call);
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78 return;
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79 }
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80 sip_tx_packet(&msg, &call->udp_sin);
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81 call->sip_state = SIP_STATE_BYE_SENT;
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82 call->sip_tx_count = 1;
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83 }
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84
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85 void
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86 process_sip_response(msg, sin)
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87 struct sip_pkt_rx *msg;
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88 struct sockaddr_in *sin;
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89 {
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90 struct sip_resp_ident rid;
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91 struct call *call;
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92 int rc;
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93
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94 rc = sip_resp_extract_ident(msg, &rid);
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95 if (rc < 0) {
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96 syslog(LOG_ERR, "SIP %03u response: bad or missing %s header",
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97 msg->status_code, rid.error_field);
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98 return;
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99 }
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100 call = find_call_by_sip_id(rid.call_id);
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101 if (!call) {
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102 syslog(LOG_ERR, "SIP %03u response: unmatched Call-ID",
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103 msg->status_code);
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104 return;
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105 }
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106 if (rid.cseq_num != 1 || strcmp(rid.cseq_method, "BYE")) {
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107 syslog(LOG_ERR,
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108 "UAC received %03u response with unknown CSeq %u %.32s",
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109 msg->status_code, rid.cseq_num, rid.cseq_method);
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110 return;
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111 }
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112 if (msg->status_code != 200)
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113 syslog(LOG_ERR, "Call in%06u: non-200 response to BYE: %.64s",
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114 call->in_tag_num, msg->status_str);
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115 if (msg->status_code < 200)
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116 return;
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117 if (call->sip_state == SIP_STATE_BYE_SENT) {
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118 call->sip_state = SIP_STATE_ENDED;
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119 if (msg->status_code <= 299)
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120 sip_mark_end_time(call, sip_linger_acked);
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121 else
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122 sip_mark_end_time(call, sip_linger_error);
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123 transition_dead_sip(call);
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124 }
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125 }