FreeCalypso > hg > themwi-system-sw
annotate sip-out/bye_in.c @ 170:a6eb2de277f6
mgw: massive simplification for continuous RTP stream from BTS
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 20 Nov 2022 01:58:47 -0800 |
parents | bfa9f0c0f0ac |
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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 } |