FreeCalypso > hg > themwi-system-sw

annotate sip-out/mgw_resp.c @ 275:def9f6e4f49e default tip

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doc/Use-outside-USA: Fake-NANP-numbers article is here
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 27 Nov 2023 21:49:19 -0800
parents e54b0a9e322f
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * In this module we implement our handling of all responses
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3 * from themwi-mgw.
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4 */
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5
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6 #include <sys/types.h>
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7 #include <sys/socket.h>
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8 #include <sys/time.h>
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9 #include <netinet/in.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 "../include/gsm48_const.h"
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17 #include "../include/tmgw_ctrl.h"
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18 #include "../include/tmgw_const.h"
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19 #include "../include/out_routes.h"
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20 #include "call.h"
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21
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22 extern struct call *find_call_with_mgw_xact();
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23
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24 static void
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25 crcx_response(call, msg)
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26 struct call *call;
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27 struct tmgw_ctrl_resp *msg;
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28 {
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29 int cause;
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30
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31 if (msg->res == TMGW_RESP_OK) {
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32 call->mgw_state = MGW_STATE_ALLOCATED;
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33 call->mgw_ep_id = msg->ep_id;
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34 bcopy(&msg->gsm_addr, &call->gsm_rtp_tmgw,
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35 sizeof(struct sockaddr_storage));
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36 bcopy(&msg->pstn_addr, &call->pstn_rtp_local,
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37 sizeof(struct sockaddr_in));
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38 switch (call->overall_state) {
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39 case OVERALL_STATE_CRCX:
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40 send_rtp_connect(call);
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41 start_sip_out(call);
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42 return;
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43 case OVERALL_STATE_TEARDOWN:
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44 tmgw_send_dlcx(call);
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45 return;
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46 default:
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47 bad_state:
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48 syslog(LOG_CRIT,
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49 "FATAL: invalid overall state 0x%x on CRCX response",
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50 call->overall_state);
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51 exit(1);
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52 }
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53 } else {
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54 switch (call->overall_state) {
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55 case OVERALL_STATE_CRCX:
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56 call->overall_state = OVERALL_STATE_TEARDOWN;
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57 switch (msg->res) {
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58 case TMGW_RESP_ERR_RSRC:
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59 cause = GSM48_CC_CAUSE_RESOURCE_UNAVAIL;
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60 break;
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61 case TMGW_RESP_ERR_NOTSUP:
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62 cause = GSM48_CC_CAUSE_BEARER_CA_UNAVAIL;
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63 break;
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64 default:
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65 cause = GSM48_CC_CAUSE_PROTO_ERR;
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66 }
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67 disconnect_mncc(call, GSM48_CAUSE_LOC_PRN_S_LU, cause);
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68 return;
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69 case OVERALL_STATE_TEARDOWN:
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70 check_dead_call(call);
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71 return;
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72 default:
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73 goto bad_state;
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74 }
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75 }
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76 }
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77
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78 static void
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79 mdcx_response(call, msg)
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80 struct call *call;
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81 struct tmgw_ctrl_resp *msg;
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82 {
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83 if (call->overall_state == OVERALL_STATE_TEARDOWN) {
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84 tmgw_send_dlcx(call);
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85 return;
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86 }
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87 if (msg->res != TMGW_RESP_OK) {
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88 call->overall_state = OVERALL_STATE_TEARDOWN;
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89 tmgw_send_dlcx(call);
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90 if (msg->res == TMGW_RESP_ERR_RSRC &&
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91 (call->mgw_state == MGW_STATE_MDCX_IBT ||
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92 call->mgw_state == MGW_STATE_MDCX_CONN))
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93 disconnect_mncc(call, GSM48_CAUSE_LOC_PRN_S_LU,
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94 GSM48_CC_CAUSE_RESOURCE_UNAVAIL);
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95 else
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96 disconnect_mncc(call, GSM48_CAUSE_LOC_PRN_S_LU,
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97 GSM48_CC_CAUSE_NETWORK_OOO);
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98 disconnect_sip(call);
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99 return;
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100 }
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101 switch (call->mgw_state) {
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102 case MGW_STATE_MDCX_IBT:
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103 call->mgw_state = MGW_STATE_IBT_CONN;
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104 mncc_signal_ibt_ring(call);
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105 if (call->sip_state == SIP_STATE_CONNECTED)
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106 tmgw_send_mdcx_connect(call, 0);
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107 return;
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108 case MGW_STATE_MDCX_CONN:
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109 call->mgw_state = MGW_STATE_COMPLETE;
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110 mncc_signal_answer_sup(call);
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111 return;
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112 case MGW_STATE_MDCX_HOLD:
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113 call->mgw_state = MGW_STATE_HELD;
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114 mncc_send_hold_ack(call);
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115 return;
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116 case MGW_STATE_MDCX_RETR:
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117 call->mgw_state = MGW_STATE_COMPLETE;
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118 mncc_send_retrieve_ack(call);
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119 return;
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120 default:
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121 syslog(LOG_CRIT,
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122 "FATAL: invalid MGW state 0x%x on MDCX response",
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123 call->mgw_state);
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124 exit(1);
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125 }
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126 }
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127
154
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128 static void
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129 dlcx_response(call, msg)
60
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 struct call *call;
154
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
131 struct tmgw_ctrl_resp *msg;
60
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 {
154
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
133 if (msg->res != TMGW_RESP_OK) {
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
134 syslog(LOG_CRIT, "FATAL: TMGW DLCX failed with code 0x%x",
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
135 msg->res);
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
136 exit(1);
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
137 }
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
138 call->mgw_state = MGW_STATE_NO_EXIST;
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
139 check_dead_call(call);
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
140 }
60
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141
154
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
142 static void
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
143 dtmf_start_response(call, msg)
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
144 struct call *call;
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
145 struct tmgw_ctrl_resp *msg;
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
146 {
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
147 if (call->overall_state == OVERALL_STATE_TEARDOWN) {
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
148 tmgw_send_dlcx(call);
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
149 return;
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
150 }
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
151 if (msg->res == TMGW_RESP_OK)
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
152 mncc_dtmf_start_ok(call);
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
153 else
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
154 mncc_dtmf_start_err(call);
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
155 if (call->dtmf_pending_stop)
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
156 tmgw_send_dtmf_stop(call);
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
157 else
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
158 call->mgw_state = MGW_STATE_COMPLETE;
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
159 }
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
160
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
161 static void
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
162 dtmf_stop_response(call, msg)
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
163 struct call *call;
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
164 struct tmgw_ctrl_resp *msg;
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
165 {
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
166 if (call->overall_state == OVERALL_STATE_TEARDOWN) {
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
167 tmgw_send_dlcx(call);
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
168 return;
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
169 }
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
170 mncc_dtmf_stop_ok(call);
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
171 call->mgw_state = MGW_STATE_COMPLETE;
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
172 call->dtmf_pending_stop = 0;
60
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 }
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 void
154
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
176 process_tmgw_response(msg)
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
177 struct tmgw_ctrl_resp *msg;
141
e499e8db8b82 sip-in: handle call hold and retrieve
Mychaela Falconia <falcon@freecalypso.org>
parents: 128
diff changeset
178 {
e499e8db8b82 sip-in: handle call hold and retrieve
Mychaela Falconia <falcon@freecalypso.org>
parents: 128
diff changeset
179 struct call *call;
154
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
180 unsigned opc;
60
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181
154
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
182 call = find_call_with_mgw_xact(msg->transact_ref);
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
183 if (!call) {
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
184 syslog(LOG_CRIT,
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
185 "FATAL: response from TMGW xact 0x%x does not match any call",
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
186 msg->transact_ref);
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
187 exit(1);
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
188 }
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
189 opc = call->mgw_xact;
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
190 call->mgw_xact = 0;
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
191 switch (opc) {
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
192 case TMGW_CTRL_OP_CRCX:
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
193 crcx_response(call, msg);
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
194 return;
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
195 case TMGW_CTRL_OP_MDCX:
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
196 mdcx_response(call, msg);
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
197 return;
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
198 case TMGW_CTRL_OP_DLCX:
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
199 dlcx_response(call, msg);
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
200 return;
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
201 case TMGW_CTRL_OP_DTMF_START:
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
202 dtmf_start_response(call, msg);
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
203 return;
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
204 case TMGW_CTRL_OP_DTMF_STOP:
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
205 dtmf_stop_response(call, msg);
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
206 return;
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
207 default:
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
208 syslog(LOG_CRIT,
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
209 "FATAL: invalid opcode 0x%x in call->msg_xact", opc);
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
210 exit(1);
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 151
diff changeset
211 }
60
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
212 }