FreeCalypso > hg > themwi-system-sw
annotate mncc/mncc_recv.c @ 112:6aa63cf4620a
sip-in call clearing: select timeout implemented
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Wed, 28 Sep 2022 18:59:55 -0800 |
parents | 660126bd5f59 |
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rev | line source |
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1 /* |
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2 * In this module we implement initial handling of MNCC messages |
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3 * coming from OsmoMSC, dispatching them further as appropriate. |
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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 <stdio.h> |
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9 #include <stdint.h> |
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10 #include <stdlib.h> |
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11 #include <syslog.h> |
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12 #include "../include/mncc.h" |
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13 #include "struct.h" |
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14 #include "gsm_call.h" |
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15 |
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16 extern char *mncc_msg_name(); |
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17 |
15
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18 static void |
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19 report_runt(msg) |
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20 union mncc_msg *msg; |
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21 { |
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22 syslog(LOG_CRIT, "MNCC message type 0x%x from GSM is too short!", |
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23 msg->msg_type); |
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24 } |
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25 |
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26 static void |
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27 handle_setup_ind(msg, msglen) |
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28 struct gsm_mncc *msg; |
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29 unsigned msglen; |
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30 { |
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31 struct gsm_call *call; |
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32 |
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33 if (msglen < sizeof(struct gsm_mncc)) { |
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34 report_runt(msg); |
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35 return; |
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36 } |
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37 syslog(LOG_DEBUG, "Rx MNCC_SETUP_IND from GSM, callref=0x%x", |
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38 msg->callref); |
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39 call = find_gsm_callref(msg->callref); |
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40 if (call) { |
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41 syslog(LOG_ERR, "duplicate MNCC_SETUP_IND for callref 0x%x", |
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42 msg->callref); |
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43 /* drop it like OsmoMSC's mncc_builtin does */ |
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44 return; |
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45 } |
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46 /* further processing */ |
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47 process_mo_call_setup(msg); |
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48 } |
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49 |
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50 static void |
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51 handle_signaling_msg(msg, msglen) |
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52 struct gsm_mncc *msg; |
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53 unsigned msglen; |
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54 { |
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55 struct gsm_call *call; |
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56 |
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57 if (msglen < sizeof(struct gsm_mncc)) { |
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58 report_runt(msg); |
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59 return; |
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60 } |
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61 syslog(LOG_DEBUG, "Rx %s from GSM, callref=0x%x", |
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62 mncc_msg_name(msg->msg_type), msg->callref); |
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63 call = find_gsm_callref(msg->callref); |
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64 if (!call) { |
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65 syslog(LOG_ERR, "%s from GSM: callref 0x%x not found", |
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66 mncc_msg_name(msg->msg_type), msg->callref); |
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67 /* drop it like OsmoMSC's mncc_builtin does */ |
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68 return; |
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69 } |
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70 if (msg->msg_type == MNCC_SETUP_CNF) |
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71 preen_connected_number(msg); |
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72 /* dispatch according to internal switch or socket */ |
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73 if (call->socket) |
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74 mncc_signal_to_socket(call, msg); |
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75 else |
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76 internal_switch_mncc(call, msg); |
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77 } |
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78 |
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79 static void |
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80 handle_release_msg(msg, msglen) |
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81 struct gsm_mncc *msg; |
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82 unsigned msglen; |
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83 { |
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84 struct gsm_call *call; |
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85 |
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86 if (msglen < sizeof(struct gsm_mncc)) { |
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87 report_runt(msg); |
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88 return; |
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89 } |
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90 syslog(LOG_DEBUG, "Rx %s from GSM, callref=0x%x", |
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91 mncc_msg_name(msg->msg_type), msg->callref); |
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92 call = find_gsm_callref(msg->callref); |
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93 if (!call) { |
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94 syslog(LOG_ERR, "%s from GSM: callref 0x%x not found", |
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95 mncc_msg_name(msg->msg_type), msg->callref); |
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96 /* drop it like OsmoMSC's mncc_builtin does */ |
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97 return; |
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98 } |
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99 /* dispatch according to internal switch or socket */ |
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100 if (call->socket) { |
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101 mncc_signal_to_socket(call, msg); |
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102 syslog(LOG_DEBUG, |
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103 "clearing socket call: GSM callref 0x%x, socket ref 0x%x", |
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104 call->callref, call->socket_ref); |
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105 extsock_dec_refcount(call->socket); |
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106 call->gc_flag = 1; |
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107 } else |
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108 internal_switch_mncc(call, msg); |
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109 } |
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110 |
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111 static void |
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112 handle_rtp_msg(msg, msglen) |
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113 struct gsm_mncc_rtp *msg; |
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114 unsigned msglen; |
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115 { |
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116 struct gsm_call *call; |
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117 |
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118 if (msglen < sizeof(struct gsm_mncc_rtp)) { |
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119 report_runt(msg); |
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120 return; |
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121 } |
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122 syslog(LOG_DEBUG, "Rx %s from GSM, callref=0x%x", |
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123 mncc_msg_name(msg->msg_type), msg->callref); |
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124 call = find_gsm_callref(msg->callref); |
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125 if (!call) { |
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126 syslog(LOG_ERR, "%s from GSM: callref 0x%x not found", |
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127 mncc_msg_name(msg->msg_type), msg->callref); |
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128 /* drop it like OsmoMSC's mncc_builtin does */ |
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129 return; |
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130 } |
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131 /* only for socket connections - no RTP handling for internal */ |
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132 if (call->socket) |
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133 mncc_rtp_to_socket(call, msg); |
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134 } |
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135 |
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136 static void |
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137 handle_mncc_hello(msg, msglen) |
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138 struct gsm_mncc_hello *msg; |
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139 unsigned msglen; |
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140 { |
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141 if (msglen < sizeof(struct gsm_mncc_hello)) { |
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142 syslog(LOG_CRIT, "MNCC_SOCKET_HELLO message is too short!"); |
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143 exit(1); |
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144 } |
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145 if (msg->version != MNCC_SOCK_VERSION) { |
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146 syslog(LOG_CRIT, "MNCC hello error: version number mismatch"); |
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147 exit(1); |
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148 } |
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149 if (msg->mncc_size != sizeof(struct gsm_mncc)) { |
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150 syslog(LOG_CRIT, "MNCC hello error: mncc_size mismatch"); |
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151 exit(1); |
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152 } |
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153 } |
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154 |
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155 void |
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156 mncc_msg_from_gsm(msg, msglen) |
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157 union mncc_msg *msg; |
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158 unsigned msglen; |
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159 { |
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160 switch (msg->msg_type) { |
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161 case MNCC_SETUP_IND: |
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162 handle_setup_ind(msg, msglen); |
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163 return; |
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164 case MNCC_SETUP_CNF: |
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165 case MNCC_SETUP_COMPL_IND: |
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166 case MNCC_CALL_CONF_IND: |
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167 case MNCC_ALERT_IND: |
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168 case MNCC_NOTIFY_IND: |
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169 case MNCC_DISC_IND: |
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170 case MNCC_FACILITY_IND: |
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171 case MNCC_START_DTMF_IND: |
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172 case MNCC_STOP_DTMF_IND: |
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173 case MNCC_MODIFY_IND: |
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174 case MNCC_MODIFY_CNF: |
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175 case MNCC_MODIFY_REJ: |
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176 case MNCC_HOLD_IND: |
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177 case MNCC_RETRIEVE_IND: |
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178 case MNCC_USERINFO_IND: |
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179 handle_signaling_msg(msg, msglen); |
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180 return; |
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181 case MNCC_REL_IND: |
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182 case MNCC_REL_CNF: |
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183 case MNCC_REJ_IND: |
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184 handle_release_msg(msg, msglen); |
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185 return; |
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186 case MNCC_RTP_CREATE: |
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187 case MNCC_RTP_CONNECT: |
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188 case MNCC_RTP_FREE: |
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189 handle_rtp_msg(msg, msglen); |
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190 return; |
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191 case MNCC_SOCKET_HELLO: |
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192 handle_mncc_hello(msg, msglen); |
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193 return; |
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194 default: |
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195 syslog(LOG_CRIT, "unknown MNCC message type 0x%x from GSM", |
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196 msg->msg_type); |
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197 } |
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198 } |