FreeCalypso > hg > themwi-system-sw

annotate sip-in/bye_out.c @ 93:ff5e96162430

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libsip: new function for extracting Call-ID and CSeq from responses
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 24 Sep 2022 15:13:53 -0800
parents a9137bdb6047
children 2c22b40408fb
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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 <netinet/in.h>
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8 #include <arpa/inet.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 "../libsip/parse.h"
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16 #include "../libsip/out_msg.h"
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17 #include "call.h"
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18
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19 extern char *get_single_header();
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20 extern struct call *find_call_by_sip_id();
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21
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22 extern struct in_addr sip_bind_ip;
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23 extern unsigned sip_bind_port;
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24 extern unsigned max_forwards;
81
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25
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26 fill_bye_out_msg(msg, call)
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27 struct sip_msg_out *msg;
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28 struct call *call;
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29 {
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30 char strbuf[80];
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31 int rc;
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32
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33 rc = start_request_out_msg_urilen(msg, "BYE", call->from_uri,
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34 call->from_uri_len);
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35 if (rc < 0)
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36 return rc;
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37 sprintf(strbuf, "SIP/2.0/UDP %s:%u",
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38 inet_ntoa(sip_bind_ip), sip_bind_port);
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39 rc = out_msg_add_header(msg, "Via", strbuf);
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40 if (rc < 0)
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41 return rc;
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42 rc = out_msg_add_header(msg, "From", call->invite_to);
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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, "To", call->invite_from);
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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, "Call-ID", call->sip_call_id);
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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, "CSeq", "1 BYE");
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52 if (rc < 0)
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53 return rc;
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54 sprintf(strbuf, "%u", max_forwards);
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55 rc = out_msg_add_header(msg, "Max-Forwards", strbuf);
81
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56 if (rc < 0)
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57 return rc;
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58 out_msg_finish(msg);
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59 return 0;
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60 }
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61
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62 void
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63 initiate_bye(call)
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64 struct call *call;
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65 {
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66 struct sip_msg_out msg;
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67 int rc;
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68
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69 rc = fill_bye_out_msg(&msg, call);
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70 if (rc < 0) {
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71 syslog(LOG_ERR, "outgoing BYE request msg length exceeded");
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72 call->sip_state = SIP_STATE_MSG_SIZE_ERR;
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73 /* TODO: transition from TEARDOWN to DEAD_SIP */
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74 return;
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75 }
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76 sip_tx_packet(&msg, &call->udp_sin);
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77 call->sip_state = SIP_STATE_BYE_SENT;
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78 call->sip_tx_count = 1;
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79 }
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80
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81 void
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82 process_sip_response(msg, sin)
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83 struct sip_pkt_rx *msg;
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84 struct sockaddr_in *sin;
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85 {
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86 char *call_id_hdr, *cseq_hdr;
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87 struct call *call;
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88
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89 call_id_hdr = get_single_header(msg, "Call-ID", "i", (int *) 0);
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90 if (!call_id_hdr)
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91 return;
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92 call = find_call_by_sip_id(call_id_hdr);
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93 if (!call)
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94 return;
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95 cseq_hdr = get_single_header(msg, "CSeq", (char *) 0, (int *) 0);
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96 if (!cseq_hdr)
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97 return;
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98 if (strcmp(cseq_hdr, "1 BYE")) {
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99 syslog(LOG_ERR,
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100 "UAC received response with unknown CSeq %.32s",
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101 cseq_hdr);
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102 return;
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103 }
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104 if (msg->status_code < 200)
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105 return;
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106 if (call->sip_state == SIP_STATE_BYE_SENT)
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107 call->sip_state = SIP_STATE_ENDED;
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108 }