FreeCalypso > hg > themwi-system-sw

annotate sip-out/mncc_sig_in.c @ 184:f8c40090a0a8

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librtpalloc: new library for talking to themwi-rtp-mgr
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 11 Mar 2023 23:48:14 -0800
parents e54b0a9e322f
children
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1 /*
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2 * In this module we implement our handling of call control messages
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3 * from OsmoMSC relayed to us via themwi-mncc.
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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/mncc.h"
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17 #include "../include/gsm48_const.h"
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18 #include "../include/out_routes.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_mncc_callref();
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22
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23 static void
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24 handle_disconnect_ind(call, msg)
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25 struct call *call;
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26 struct gsm_mncc *msg;
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27 {
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28 /* release back to MNCC */
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29 msg->msg_type = MNCC_REL_REQ;
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30 send_mncc_to_sock(call->mncc, msg, sizeof(struct gsm_mncc));
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31 call->mncc_state = MNCC_STATE_RELEASE;
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32 /* signal disconnect to SIP */
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33 call->overall_state = OVERALL_STATE_TEARDOWN;
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34 disconnect_sip(call);
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35 disconnect_tmgw(call);
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36 }
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37
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38 static void
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39 handle_final_release(call, msg)
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40 struct call *call;
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41 struct gsm_mncc *msg;
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42 {
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43 /* MNCC call leg is gone */
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44 call->mncc = 0;
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45 /* signal disconnect to SIP */
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46 call->overall_state = OVERALL_STATE_TEARDOWN;
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47 disconnect_sip(call);
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48 disconnect_tmgw(call);
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49 check_dead_call(call);
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50 }
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51
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52 static void
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53 handle_dtmf_start(call, msg)
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54 struct call *call;
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55 struct gsm_mncc *msg;
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56 {
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57 if (!(msg->fields & MNCC_F_KEYPAD) ||
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58 !is_valid_dtmf_digit(msg->keypad)) {
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59 msg->msg_type = MNCC_START_DTMF_REJ;
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60 mncc_set_cause(msg, GSM48_CAUSE_LOC_PRN_S_LU,
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61 GSM48_CC_CAUSE_INVAL_MAND_INF);
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62 send_mncc_to_sock(call->mncc, msg, sizeof(struct gsm_mncc));
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63 return;
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64 }
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65 if (call->mncc_state != MNCC_STATE_CONNECTED ||
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66 call->mgw_state != MGW_STATE_COMPLETE) {
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67 msg->msg_type = MNCC_START_DTMF_REJ;
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68 mncc_set_cause(msg, GSM48_CAUSE_LOC_PRN_S_LU,
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69 GSM48_CC_CAUSE_MSGTYPE_INCOMPAT);
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70 send_mncc_to_sock(call->mncc, msg, sizeof(struct gsm_mncc));
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71 return;
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72 }
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73 call->dtmf_digit = msg->keypad;
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74 tmgw_send_dtmf_start(call);
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75 }
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76
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77 static void
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78 handle_dtmf_stop(call, msg)
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79 struct call *call;
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80 struct gsm_mncc *msg;
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81 {
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82 if (call->mncc_state != MNCC_STATE_CONNECTED)
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83 return;
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84 if (call->mgw_state == MGW_STATE_COMPLETE)
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85 tmgw_send_dtmf_stop(call);
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86 else if (call->mgw_state == MGW_STATE_DTMF_OP)
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87 call->dtmf_pending_stop = 1;
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88 else {
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89 /* dummy OK response */
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90 msg->msg_type = MNCC_STOP_DTMF_RSP;
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91 send_mncc_to_sock(call->mncc, msg, sizeof(struct gsm_mncc));
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92 }
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93 }
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94
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95 static void
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96 handle_call_hold(call, msg)
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97 struct call *call;
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98 struct gsm_mncc *msg;
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99 {
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100 if (call->mncc_state != MNCC_STATE_CONNECTED ||
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101 call->mgw_state != MGW_STATE_COMPLETE) {
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102 msg->msg_type = MNCC_HOLD_REJ;
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103 mncc_set_cause(msg, GSM48_CAUSE_LOC_PRN_S_LU,
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104 GSM48_CC_CAUSE_MSGTYPE_INCOMPAT);
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105 send_mncc_to_sock(call->mncc, msg, sizeof(struct gsm_mncc));
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106 return;
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107 }
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108 tmgw_send_mdcx_hold(call);
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109 }
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110
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111 static void
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112 handle_call_retrieve(call, msg)
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113 struct call *call;
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114 struct gsm_mncc *msg;
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115 {
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116 if (call->mncc_state != MNCC_STATE_CONNECTED ||
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117 call->mgw_state != MGW_STATE_HELD) {
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118 msg->msg_type = MNCC_RETRIEVE_REJ;
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119 mncc_set_cause(msg, GSM48_CAUSE_LOC_PRN_S_LU,
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120 GSM48_CC_CAUSE_MSGTYPE_INCOMPAT);
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121 send_mncc_to_sock(call->mncc, msg, sizeof(struct gsm_mncc));
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122 return;
e499e8db8b82 sip-in: handle call hold and retrieve
Mychaela Falconia <falcon@freecalypso.org>
parents: 140
diff changeset
123 }
e499e8db8b82 sip-in: handle call hold and retrieve
Mychaela Falconia <falcon@freecalypso.org>
parents: 140
diff changeset
124 send_rtp_connect(call);
e499e8db8b82 sip-in: handle call hold and retrieve
Mychaela Falconia <falcon@freecalypso.org>
parents: 140
diff changeset
125 tmgw_send_mdcx_retrieve(call);
128
5685412bd6aa sip-in: pass DTMF start & stop to themwi-mgw
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
126 }
5685412bd6aa sip-in: pass DTMF start & stop to themwi-mgw
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
127
154
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 153
diff changeset
128 void
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 153
diff changeset
129 handle_mncc_signal(mncc, msg, msglen)
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 153
diff changeset
130 struct mncc_conn *mncc;
63
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 struct gsm_mncc *msg;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 unsigned msglen;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 {
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 struct call *call;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 if (msglen != sizeof(struct gsm_mncc)) {
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 syslog(LOG_CRIT,
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 "FATAL: Rx MNCC message type 0x%x has wrong length",
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 msg->msg_type);
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 exit(1);
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 }
154
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 153
diff changeset
142 call = find_call_by_mncc_callref(mncc, msg->callref);
63
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 if (!call) {
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 syslog(LOG_CRIT,
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 "error: Rx MNCC message type 0x%x has invalid callref 0x%x",
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 msg->msg_type, msg->callref);
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 exit(1);
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 }
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 switch (msg->msg_type) {
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 case MNCC_DISC_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 handle_disconnect_ind(call, msg);
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 return;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 case MNCC_REL_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 case MNCC_REL_CNF:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 handle_final_release(call, msg);
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 return;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 case MNCC_START_DTMF_IND:
128
5685412bd6aa sip-in: pass DTMF start & stop to themwi-mgw
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
158 handle_dtmf_start(call, msg);
63
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 return;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 case MNCC_STOP_DTMF_IND:
128
5685412bd6aa sip-in: pass DTMF start & stop to themwi-mgw
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
161 handle_dtmf_stop(call, msg);
63
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 return;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 case MNCC_MODIFY_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 msg->msg_type = MNCC_MODIFY_REJ;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 mncc_set_cause(msg, GSM48_CAUSE_LOC_PRN_S_LU,
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 GSM48_CC_CAUSE_SERV_OPT_UNIMPL);
154
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 153
diff changeset
167 send_mncc_to_sock(mncc, msg, sizeof(struct gsm_mncc));
63
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 return;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 case MNCC_HOLD_IND:
141
e499e8db8b82 sip-in: handle call hold and retrieve
Mychaela Falconia <falcon@freecalypso.org>
parents: 140
diff changeset
170 handle_call_hold(call, msg);
63
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 return;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 case MNCC_RETRIEVE_IND:
141
e499e8db8b82 sip-in: handle call hold and retrieve
Mychaela Falconia <falcon@freecalypso.org>
parents: 140
diff changeset
173 handle_call_retrieve(call, msg);
63
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 return;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 }
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 }
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177
154
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 153
diff changeset
178 void
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 153
diff changeset
179 handle_rtp_create(mncc, msg, msglen)
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 153
diff changeset
180 struct mncc_conn *mncc;
63
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 struct gsm_mncc_rtp *msg;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 unsigned msglen;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 {
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 struct call *call;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 if (msglen != sizeof(struct gsm_mncc_rtp)) {
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 syslog(LOG_CRIT,
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 "FATAL: Rx MNCC message type 0x%x has wrong length",
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 msg->msg_type);
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 exit(1);
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191 }
154
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 153
diff changeset
192 call = find_call_by_mncc_callref(mncc, msg->callref);
63
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 if (!call) {
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194 syslog(LOG_CRIT,
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195 "error: Rx MNCC message type 0x%x has invalid callref 0x%x",
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196 msg->msg_type, msg->callref);
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197 exit(1);
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198 }
154
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 153
diff changeset
199 /* we need to be in the right state */
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 153
diff changeset
200 if (call->mncc_state != MNCC_STATE_MO_PROC) {
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 153
diff changeset
201 syslog(LOG_ERR,
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 153
diff changeset
202 "duplicate MNCC_RTP_CREATE for MO callref 0x%x, ignoring",
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 153
diff changeset
203 msg->callref);
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 153
diff changeset
204 return;
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 153
diff changeset
205 }
84
f82157ac7303 sip-in: handle MNCC_RTP_CREATE
Mychaela Falconia <falcon@freecalypso.org>
parents: 83
diff changeset
206 /* save Osmocom network RTP information */
f82157ac7303 sip-in: handle MNCC_RTP_CREATE
Mychaela Falconia <falcon@freecalypso.org>
parents: 83
diff changeset
207 bcopy(&msg->addr, &call->gsm_rtp_osmo, sizeof(struct sockaddr_storage));
f82157ac7303 sip-in: handle MNCC_RTP_CREATE
Mychaela Falconia <falcon@freecalypso.org>
parents: 83
diff changeset
208 call->gsm_payload_type = msg->payload_type;
f82157ac7303 sip-in: handle MNCC_RTP_CREATE
Mychaela Falconia <falcon@freecalypso.org>
parents: 83
diff changeset
209 call->gsm_payload_msg_type = msg->payload_msg_type;
154
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 153
diff changeset
210 /* move forward */
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 153
diff changeset
211 call->mncc_state = MNCC_STATE_GOT_RTP;
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 153
diff changeset
212 call->overall_state = OVERALL_STATE_CRCX;
e54b0a9e322f beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents: 153
diff changeset
213 tmgw_send_crcx(call);
63
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
214 }