FreeCalypso > hg > themwi-system-sw

annotate sip-in/mncc_handle.c @ 63:e5aee661e3b2

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sip-in: beginning to handle incoming MNCC messages from themwi-mncc
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 18 Sep 2022 15:01:11 -0800
parents
children 7c0309df59f8
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63
e5aee661e3b2 sip-in: beginning to handle incoming MNCC messages from themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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Mychaela Falconia <falcon@freecalypso.org>
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2 * In this module we implement our handling of call control messages
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Mychaela Falconia <falcon@freecalypso.org>
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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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Mychaela Falconia <falcon@freecalypso.org>
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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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Mychaela Falconia <falcon@freecalypso.org>
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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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Mychaela Falconia <falcon@freecalypso.org>
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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 /* handling to be implemented */
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27 }
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28
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29 static void
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30 handle_answer(call, msg)
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31 struct call *call;
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32 struct gsm_mncc *msg;
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33 {
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34 /* handling to be implemented */
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35 }
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36
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37 static void
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38 handle_disconnect_ind(call, msg)
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39 struct call *call;
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40 struct gsm_mncc *msg;
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41 {
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42 /* handling to be implemented */
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43 }
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44
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45 static void
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Mychaela Falconia <falcon@freecalypso.org>
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46 handle_final_release(call, msg)
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47 struct call *call;
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48 struct gsm_mncc *msg;
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49 {
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50 /* handling to be implemented */
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51 }
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52
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53 static void
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54 handle_signaling_msg(msg, msglen)
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55 struct gsm_mncc *msg;
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56 unsigned msglen;
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57 {
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58 struct call *call;
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59
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60 if (msglen != sizeof(struct gsm_mncc)) {
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61 syslog(LOG_CRIT,
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62 "FATAL: Rx MNCC message type 0x%x has wrong length",
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63 msg->msg_type);
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64 exit(1);
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65 }
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66 call = find_call_by_mncc_callref(msg->callref);
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67 if (!call) {
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68 syslog(LOG_CRIT,
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69 "error: Rx MNCC message type 0x%x has invalid callref 0x%x",
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70 msg->msg_type, msg->callref);
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71 exit(1);
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72 }
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73 switch (msg->msg_type) {
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74 case MNCC_SETUP_CNF:
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75 handle_answer(call, msg);
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76 return;
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77 case MNCC_ALERT_IND:
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78 handle_alerting(call, msg);
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79 return;
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80 case MNCC_DISC_IND:
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81 handle_disconnect_ind(call, msg);
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82 return;
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83 case MNCC_REL_IND:
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84 case MNCC_REL_CNF:
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85 case MNCC_REJ_IND:
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86 handle_final_release(call, msg);
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87 return;
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88 case MNCC_START_DTMF_IND:
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89 msg->msg_type = MNCC_START_DTMF_REJ;
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90 mncc_set_cause(msg, GSM48_CAUSE_LOC_PRN_S_LU,
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91 GSM48_CC_CAUSE_SERV_OPT_UNIMPL);
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92 send_mncc_to_gsm(msg, sizeof(struct gsm_mncc));
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93 return;
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94 case MNCC_STOP_DTMF_IND:
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95 msg->msg_type = MNCC_STOP_DTMF_RSP;
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96 send_mncc_to_gsm(msg, sizeof(struct gsm_mncc));
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97 return;
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98 case MNCC_MODIFY_IND:
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99 msg->msg_type = MNCC_MODIFY_REJ;
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100 mncc_set_cause(msg, GSM48_CAUSE_LOC_PRN_S_LU,
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101 GSM48_CC_CAUSE_SERV_OPT_UNIMPL);
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102 send_mncc_to_gsm(msg, sizeof(struct gsm_mncc));
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103 return;
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104 case MNCC_HOLD_IND:
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105 msg->msg_type = MNCC_HOLD_REJ;
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106 mncc_set_cause(msg, GSM48_CAUSE_LOC_PRN_S_LU,
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107 GSM48_CC_CAUSE_SERV_OPT_UNIMPL);
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108 send_mncc_to_gsm(msg, sizeof(struct gsm_mncc));
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109 return;
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110 case MNCC_RETRIEVE_IND:
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111 msg->msg_type = MNCC_RETRIEVE_REJ;
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112 mncc_set_cause(msg, GSM48_CAUSE_LOC_PRN_S_LU,
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113 GSM48_CC_CAUSE_SERV_OPT_UNIMPL);
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114 send_mncc_to_gsm(msg, sizeof(struct gsm_mncc));
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115 return;
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116 }
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117 }
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118
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diff changeset
119 static void
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120 handle_rtp_create(msg, msglen)
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121 struct gsm_mncc_rtp *msg;
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122 unsigned msglen;
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123 {
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Mychaela Falconia <falcon@freecalypso.org>
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124 struct call *call;
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Mychaela Falconia <falcon@freecalypso.org>
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125
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Mychaela Falconia <falcon@freecalypso.org>
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126 if (msglen != sizeof(struct gsm_mncc_rtp)) {
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Mychaela Falconia <falcon@freecalypso.org>
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127 syslog(LOG_CRIT,
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Mychaela Falconia <falcon@freecalypso.org>
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128 "FATAL: Rx MNCC message type 0x%x has wrong length",
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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129 msg->msg_type);
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Mychaela Falconia <falcon@freecalypso.org>
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130 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
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131 }
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Mychaela Falconia <falcon@freecalypso.org>
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132 call = find_call_by_mncc_callref(msg->callref);
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Mychaela Falconia <falcon@freecalypso.org>
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133 if (!call) {
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Mychaela Falconia <falcon@freecalypso.org>
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134 syslog(LOG_CRIT,
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Mychaela Falconia <falcon@freecalypso.org>
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135 "error: Rx MNCC message type 0x%x has invalid callref 0x%x",
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 msg->msg_type, msg->callref);
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Mychaela Falconia <falcon@freecalypso.org>
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137 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
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138 }
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Mychaela Falconia <falcon@freecalypso.org>
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139 /* handling to be implemented */
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140 }
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Mychaela Falconia <falcon@freecalypso.org>
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141
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Mychaela Falconia <falcon@freecalypso.org>
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142 void
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Mychaela Falconia <falcon@freecalypso.org>
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143 msg_from_mncc(msg, msglen)
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Mychaela Falconia <falcon@freecalypso.org>
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144 union mncc_msg *msg;
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145 unsigned msglen;
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Mychaela Falconia <falcon@freecalypso.org>
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146 {
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Mychaela Falconia <falcon@freecalypso.org>
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147 switch (msg->msg_type) {
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Mychaela Falconia <falcon@freecalypso.org>
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148 case MNCC_SETUP_CNF:
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Mychaela Falconia <falcon@freecalypso.org>
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149 case MNCC_CALL_CONF_IND:
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Mychaela Falconia <falcon@freecalypso.org>
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150 case MNCC_ALERT_IND:
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Mychaela Falconia <falcon@freecalypso.org>
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151 case MNCC_NOTIFY_IND:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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152 case MNCC_DISC_IND:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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153 case MNCC_FACILITY_IND:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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154 case MNCC_START_DTMF_IND:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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155 case MNCC_STOP_DTMF_IND:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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156 case MNCC_MODIFY_IND:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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157 case MNCC_HOLD_IND:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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158 case MNCC_RETRIEVE_IND:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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159 case MNCC_USERINFO_IND:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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160 case MNCC_REL_IND:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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161 case MNCC_REL_CNF:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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162 case MNCC_REJ_IND:
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parents:
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163 handle_signaling_msg(msg, msglen);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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164 return;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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165 case MNCC_RTP_CREATE:
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parents:
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166 handle_rtp_create(msg, msglen);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 return;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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168 default:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 syslog(LOG_CRIT,
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 "FATAL: received unexpected MNCC message type 0x%x",
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 msg->msg_type);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 }