FreeCalypso > hg > themwi-system-sw
annotate sip-in/mncc_handle.c @ 63:e5aee661e3b2
sip-in: beginning to handle incoming MNCC messages from themwi-mncc
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 18 Sep 2022 15:01:11 -0800 |
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children | 7c0309df59f8 |
rev | line source |
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63
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sip-in: beginning to handle incoming MNCC messages from themwi-mncc
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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 /* 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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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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Mychaela Falconia <falcon@freecalypso.org>
parents:
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107 GSM48_CC_CAUSE_SERV_OPT_UNIMPL); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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108 send_mncc_to_gsm(msg, sizeof(struct gsm_mncc)); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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109 return; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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110 case MNCC_RETRIEVE_IND: |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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111 msg->msg_type = MNCC_RETRIEVE_REJ; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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112 mncc_set_cause(msg, GSM48_CAUSE_LOC_PRN_S_LU, |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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113 GSM48_CC_CAUSE_SERV_OPT_UNIMPL); |
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parents:
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114 send_mncc_to_gsm(msg, sizeof(struct gsm_mncc)); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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115 return; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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116 } |
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parents:
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117 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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118 |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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119 static void |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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120 handle_rtp_create(msg, msglen) |
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parents:
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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>
parents:
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124 struct call *call; |
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125 |
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126 if (msglen != sizeof(struct gsm_mncc_rtp)) { |
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127 syslog(LOG_CRIT, |
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128 "FATAL: Rx MNCC message type 0x%x has wrong length", |
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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>
parents:
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131 } |
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132 call = find_call_by_mncc_callref(msg->callref); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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133 if (!call) { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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134 syslog(LOG_CRIT, |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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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:
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|
136 msg->msg_type, msg->callref); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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137 exit(1); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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138 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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139 /* handling to be implemented */ |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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140 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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|
141 |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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142 void |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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143 msg_from_mncc(msg, msglen) |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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144 union mncc_msg *msg; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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145 unsigned msglen; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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|
146 { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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147 switch (msg->msg_type) { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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148 case MNCC_SETUP_CNF: |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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|
149 case MNCC_CALL_CONF_IND: |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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150 case MNCC_ALERT_IND: |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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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:
diff
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|
158 case MNCC_RETRIEVE_IND: |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
159 case MNCC_USERINFO_IND: |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
160 case MNCC_REL_IND: |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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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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Mychaela Falconia <falcon@freecalypso.org>
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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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
166 handle_rtp_create(msg, msglen); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
167 return; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
168 default: |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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|
169 syslog(LOG_CRIT, |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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|
170 "FATAL: received unexpected MNCC message type 0x%x", |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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|
171 msg->msg_type); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
172 exit(1); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
173 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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|
174 } |