FreeCalypso > hg > themwi-system-sw

annotate sip-in/mncc_handle.c @ 79:b0df2b200d77

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sip-in: implement SIP CANCEL
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 20 Sep 2022 18:58:11 -0800
parents 5beb51de1bae
children 3e3fbf44f9d7
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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);
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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 if (call->mncc_state != MNCC_STATE_STARTED &&
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42 call->mncc_state != MNCC_STATE_ALERTING) {
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43 syslog(LOG_ERR, "MNCC_SETUP_CNF in wrong MNCC state 0x%x",
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44 call->mncc_state);
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45 return;
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46 }
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47 call->mncc_state = MNCC_STATE_ANSWERED;
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48 call->overall_state = OVERALL_STATE_ANSWERED;
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49 signal_invite_200(call);
63
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50 }
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51
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52 static void
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53 handle_disconnect_ind(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_final_release(call, msg)
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62 struct call *call;
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63 struct gsm_mncc *msg;
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64 {
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65 /* handling to be implemented */
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66 }
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67
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68 static void
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69 handle_signaling_msg(msg, msglen)
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70 struct gsm_mncc *msg;
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71 unsigned msglen;
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72 {
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73 struct call *call;
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74
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75 if (msglen != sizeof(struct gsm_mncc)) {
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76 syslog(LOG_CRIT,
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77 "FATAL: Rx MNCC message type 0x%x has wrong length",
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78 msg->msg_type);
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79 exit(1);
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80 }
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81 call = find_call_by_mncc_callref(msg->callref);
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82 if (!call) {
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83 syslog(LOG_CRIT,
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84 "error: Rx MNCC message type 0x%x has invalid callref 0x%x",
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85 msg->msg_type, msg->callref);
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86 exit(1);
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87 }
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88 switch (msg->msg_type) {
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89 case MNCC_SETUP_CNF:
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90 handle_answer(call, msg);
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91 return;
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92 case MNCC_ALERT_IND:
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93 handle_alerting(call, msg);
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94 return;
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95 case MNCC_DISC_IND:
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96 handle_disconnect_ind(call, msg);
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97 return;
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98 case MNCC_REL_IND:
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99 case MNCC_REL_CNF:
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100 case MNCC_REJ_IND:
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101 handle_final_release(call, msg);
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102 return;
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103 case MNCC_START_DTMF_IND:
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104 msg->msg_type = MNCC_START_DTMF_REJ;
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105 mncc_set_cause(msg, GSM48_CAUSE_LOC_PRN_S_LU,
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106 GSM48_CC_CAUSE_SERV_OPT_UNIMPL);
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107 send_mncc_to_gsm(msg, sizeof(struct gsm_mncc));
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108 return;
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109 case MNCC_STOP_DTMF_IND:
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110 msg->msg_type = MNCC_STOP_DTMF_RSP;
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111 send_mncc_to_gsm(msg, sizeof(struct gsm_mncc));
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112 return;
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113 case MNCC_MODIFY_IND:
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114 msg->msg_type = MNCC_MODIFY_REJ;
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115 mncc_set_cause(msg, GSM48_CAUSE_LOC_PRN_S_LU,
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116 GSM48_CC_CAUSE_SERV_OPT_UNIMPL);
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117 send_mncc_to_gsm(msg, sizeof(struct gsm_mncc));
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118 return;
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119 case MNCC_HOLD_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 msg->msg_type = MNCC_HOLD_REJ;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 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
122 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
123 send_mncc_to_gsm(msg, sizeof(struct gsm_mncc));
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 return;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 case MNCC_RETRIEVE_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 msg->msg_type = MNCC_RETRIEVE_REJ;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 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
128 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
129 send_mncc_to_gsm(msg, sizeof(struct gsm_mncc));
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 return;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 }
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
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 static void
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 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
136 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
137 unsigned msglen;
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 struct call *call;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 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
142 syslog(LOG_CRIT,
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 "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
144 msg->msg_type);
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 exit(1);
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 }
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 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
148 if (!call) {
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 syslog(LOG_CRIT,
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 "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
151 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
152 exit(1);
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 }
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 /* handling to be implemented */
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 }
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 void
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 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
159 union mncc_msg *msg;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 unsigned msglen;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 {
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 switch (msg->msg_type) {
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 case MNCC_SETUP_CNF:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 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
165 case MNCC_ALERT_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 case MNCC_NOTIFY_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 case MNCC_DISC_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 case MNCC_FACILITY_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 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
170 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
171 case MNCC_MODIFY_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 case MNCC_HOLD_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 case MNCC_RETRIEVE_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 case MNCC_USERINFO_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 case MNCC_REL_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 case MNCC_REL_CNF:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 case MNCC_REJ_IND:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 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
179 return;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 case MNCC_RTP_CREATE:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 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
182 return;
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 default:
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 syslog(LOG_CRIT,
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185 "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
186 msg->msg_type);
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 exit(1);
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 }
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 }