FreeCalypso > hg > themwi-system-sw

annotate sip-in/disconnect.c @ 95:f280328e7e2e

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themwi-mgw: initial implementation of PSTN to GSM forwarding
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 25 Sep 2022 19:17:44 -0800
parents 3e3fbf44f9d7
children 0d6435808bcd
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1 /*
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2 * In this module we implement call disconnection and clearing procedures.
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3 */
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4
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5 #include <sys/types.h>
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6 #include <sys/socket.h>
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7 #include <netinet/in.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 <string.h>
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12 #include <strings.h>
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13 #include <syslog.h>
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14 #include "../include/mncc.h"
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15 #include "../include/gsm48_const.h"
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16 #include "call.h"
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17
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18 void
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19 disconnect_mncc(call, cause_loc, cause_val)
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20 struct call *call;
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21 {
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22 struct gsm_mncc msg;
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23
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24 switch (call->mncc_state) {
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25 case MNCC_STATE_NO_EXIST:
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26 case MNCC_STATE_DISCONNECT:
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27 case MNCC_STATE_RELEASE:
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28 return;
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29 }
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30 bzero(&msg, sizeof(struct gsm_mncc));
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31 msg.msg_type = MNCC_DISC_REQ;
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32 msg.callref = call->mncc_callref;
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33 mncc_set_cause(&msg, cause_loc, cause_val);
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34 send_mncc_to_gsm(&msg, sizeof(struct gsm_mncc));
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35 call->mncc_state = MNCC_STATE_DISCONNECT;
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36 }
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37
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38 void
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39 disconnect_tmgw(call)
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40 struct call *call;
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41 {
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42 switch (call->mgw_state) {
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43 case MGW_STATE_NO_EXIST:
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44 case MGW_STATE_CONNECTING:
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45 case MGW_STATE_DELETING:
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46 return;
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47 case MGW_STATE_ALLOCATED:
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48 case MGW_STATE_COMPLETE:
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49 tmgw_send_dlcx(call);
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50 return;
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51 default:
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52 syslog(LOG_CRIT,
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53 "FATAL: invalid MGW state 0x%x in disconnect_tmgw()",
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54 call->mgw_state);
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55 exit(1);
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56 }
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57 }
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58
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59 static char *
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60 cause_to_invite_err(cause)
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61 struct gsm_mncc_cause *cause;
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62 {
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63 switch (cause->value) {
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64 case GSM48_CC_CAUSE_CALL_REJECTED:
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65 return "403 Call rejected";
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66 case GSM48_CC_CAUSE_UNASSIGNED_NR:
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67 return "404 Unassigned number";
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68 case GSM48_CC_CAUSE_USER_NOTRESPOND:
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69 return "480 User not responding";
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70 case GSM48_CC_CAUSE_RESOURCE_UNAVAIL:
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71 return "503 GSM network resource unavailable";
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72 case GSM48_CC_CAUSE_TEMP_FAILURE:
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73 return "503 Temporary failure";
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74 case GSM48_CC_CAUSE_SWITCH_CONG:
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75 return "503 Switch congestion at MSC";
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76 case GSM48_CC_CAUSE_USER_BUSY:
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77 return "486 User busy";
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78 case GSM48_CC_CAUSE_DEST_OOO:
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79 return "502 Destination out of order";
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80 case GSM48_CC_CAUSE_NETWORK_OOO:
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81 return "503 Network out of order";
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82 default:
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83 return "480 Unavailable (unspecified)";
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84 }
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85 }
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86
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87 void
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88 disconnect_sip(call, cause)
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89 struct call *call;
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90 struct gsm_mncc_cause *cause;
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91 {
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92 switch (call->sip_state) {
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93 case SIP_STATE_INVITE_PROC:
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94 case SIP_STATE_RINGING:
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95 case SIP_STATE_RINGING_PRACK:
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96 strcpy(call->invite_fail, cause_to_invite_err(cause));
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97 signal_invite_error(call);
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98 break;
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99 case SIP_STATE_INVITE_200:
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100 /* have to wait for SIP ACK, then send BYE */
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101 break;
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102 case SIP_STATE_CONNECTED:
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103 initiate_bye(call);
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104 break;
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105 }
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106 }