FreeCalypso > hg > themwi-system-sw

annotate sip-in/mncc_handle.c @ 65:7c0309df59f8

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sip-in: handling of ALERTING state
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 18 Sep 2022 15:44:22 -0800
parents e5aee661e3b2
children 5beb51de1bae
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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 <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/mncc.h"
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16 #include "../include/gsm48_const.h"
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17 #include "call.h"
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18
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19 extern struct call *find_call_by_mncc_callref();
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20
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21 static void
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22 handle_alerting(call, msg)
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23 struct call *call;
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24 struct gsm_mncc *msg;
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25 {
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26 if (call->mncc_state != MNCC_STATE_STARTED) {
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27 syslog(LOG_ERR, "MNCC_ALERT_IND in wrong MNCC state 0x%x",
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28 call->mncc_state);
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29 return;
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30 }
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31 call->mncc_state = MNCC_STATE_ALERTING;
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32 call->overall_state = OVERALL_STATE_ALERTING;
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33 signal_invite_ringing(call);
63
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34 }
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35
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36 static void
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37 handle_answer(call, msg)
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38 struct call *call;
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39 struct gsm_mncc *msg;
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40 {
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41 /* handling to be implemented */
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42 }
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43
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44 static void
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45 handle_disconnect_ind(call, msg)
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46 struct call *call;
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47 struct gsm_mncc *msg;
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48 {
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49 /* handling to be implemented */
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50 }
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51
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52 static void
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53 handle_final_release(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 /* handling to be implemented */
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58 }
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59
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60 static void
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61 handle_signaling_msg(msg, msglen)
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62 struct gsm_mncc *msg;
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63 unsigned msglen;
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64 {
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65 struct call *call;
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66
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67 if (msglen != sizeof(struct gsm_mncc)) {
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68 syslog(LOG_CRIT,
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69 "FATAL: Rx MNCC message type 0x%x has wrong length",
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70 msg->msg_type);
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71 exit(1);
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72 }
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73 call = find_call_by_mncc_callref(msg->callref);
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74 if (!call) {
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75 syslog(LOG_CRIT,
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76 "error: Rx MNCC message type 0x%x has invalid callref 0x%x",
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77 msg->msg_type, msg->callref);
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78 exit(1);
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79 }
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80 switch (msg->msg_type) {
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81 case MNCC_SETUP_CNF:
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82 handle_answer(call, msg);
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83 return;
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84 case MNCC_ALERT_IND:
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85 handle_alerting(call, msg);
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86 return;
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87 case MNCC_DISC_IND:
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88 handle_disconnect_ind(call, msg);
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89 return;
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90 case MNCC_REL_IND:
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91 case MNCC_REL_CNF:
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92 case MNCC_REJ_IND:
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93 handle_final_release(call, msg);
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94 return;
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95 case MNCC_START_DTMF_IND:
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96 msg->msg_type = MNCC_START_DTMF_REJ;
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97 mncc_set_cause(msg, GSM48_CAUSE_LOC_PRN_S_LU,
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98 GSM48_CC_CAUSE_SERV_OPT_UNIMPL);
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99 send_mncc_to_gsm(msg, sizeof(struct gsm_mncc));
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100 return;
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101 case MNCC_STOP_DTMF_IND:
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102 msg->msg_type = MNCC_STOP_DTMF_RSP;
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103 send_mncc_to_gsm(msg, sizeof(struct gsm_mncc));
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104 return;
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105 case MNCC_MODIFY_IND:
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106 msg->msg_type = MNCC_MODIFY_REJ;
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107 mncc_set_cause(msg, GSM48_CAUSE_LOC_PRN_S_LU,
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108 GSM48_CC_CAUSE_SERV_OPT_UNIMPL);
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109 send_mncc_to_gsm(msg, sizeof(struct gsm_mncc));
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110 return;
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111 case MNCC_HOLD_IND:
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112 msg->msg_type = MNCC_HOLD_REJ;
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113 mncc_set_cause(msg, GSM48_CAUSE_LOC_PRN_S_LU,
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114 GSM48_CC_CAUSE_SERV_OPT_UNIMPL);
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115 send_mncc_to_gsm(msg, sizeof(struct gsm_mncc));
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116 return;
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117 case MNCC_RETRIEVE_IND:
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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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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 GSM48_CC_CAUSE_SERV_OPT_UNIMPL);
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 send_mncc_to_gsm(msg, sizeof(struct gsm_mncc));
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 return;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 }
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 }
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 static void
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 handle_rtp_create(msg, msglen)
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 struct gsm_mncc_rtp *msg;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 unsigned msglen;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 {
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 struct call *call;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 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
134 syslog(LOG_CRIT,
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 "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
136 msg->msg_type);
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 exit(1);
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 }
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 call = find_call_by_mncc_callref(msg->callref);
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 if (!call) {
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 syslog(LOG_CRIT,
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 "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
143 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
144 exit(1);
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 }
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 /* handling to be implemented */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 }
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 void
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 msg_from_mncc(msg, msglen)
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 union mncc_msg *msg;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 unsigned msglen;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 switch (msg->msg_type) {
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 case MNCC_SETUP_CNF:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 case MNCC_CALL_CONF_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 case MNCC_ALERT_IND:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 case MNCC_NOTIFY_IND:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 case MNCC_DISC_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 case MNCC_FACILITY_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 case MNCC_START_DTMF_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 case MNCC_STOP_DTMF_IND:
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 case MNCC_HOLD_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 case MNCC_RETRIEVE_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 case MNCC_USERINFO_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 case MNCC_REL_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 case MNCC_REL_CNF:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 case MNCC_REJ_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 handle_signaling_msg(msg, msglen);
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_RTP_CREATE:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 handle_rtp_create(msg, msglen);
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 default:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 syslog(LOG_CRIT,
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 "FATAL: received unexpected MNCC message type 0x%x",
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 msg->msg_type);
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 exit(1);
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 }
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 }