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annotate sip-in/disconnect.c @ 109:9b87894704eb

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sip-in: first step toward final call clearing
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 28 Sep 2022 16:32:13 -0800
parents 0d6435808bcd
children 5685412bd6aa
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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 <sys/time.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 void
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20 disconnect_mncc(call, cause_loc, cause_val)
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21 struct call *call;
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22 {
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23 struct gsm_mncc msg;
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24
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25 switch (call->mncc_state) {
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26 case MNCC_STATE_NO_EXIST:
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27 case MNCC_STATE_DISCONNECT:
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28 case MNCC_STATE_RELEASE:
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29 return;
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30 }
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31 bzero(&msg, sizeof(struct gsm_mncc));
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32 msg.msg_type = MNCC_DISC_REQ;
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33 msg.callref = call->mncc_callref;
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34 mncc_set_cause(&msg, cause_loc, cause_val);
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35 send_mncc_to_gsm(&msg, sizeof(struct gsm_mncc));
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36 call->mncc_state = MNCC_STATE_DISCONNECT;
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37 }
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38
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39 void
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40 disconnect_tmgw(call)
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41 struct call *call;
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42 {
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43 switch (call->mgw_state) {
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44 case MGW_STATE_NO_EXIST:
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45 case MGW_STATE_CONNECTING:
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46 case MGW_STATE_DELETING:
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47 return;
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48 case MGW_STATE_ALLOCATED:
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49 case MGW_STATE_COMPLETE:
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50 tmgw_send_dlcx(call);
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51 return;
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52 default:
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53 syslog(LOG_CRIT,
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54 "FATAL: invalid MGW state 0x%x in disconnect_tmgw()",
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55 call->mgw_state);
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56 exit(1);
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57 }
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58 }
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59
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60 static char *
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61 cause_to_invite_err(cause)
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62 struct gsm_mncc_cause *cause;
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63 {
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64 switch (cause->value) {
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65 case GSM48_CC_CAUSE_CALL_REJECTED:
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66 return "403 Call rejected";
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67 case GSM48_CC_CAUSE_UNASSIGNED_NR:
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68 return "404 Unassigned number";
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69 case GSM48_CC_CAUSE_USER_NOTRESPOND:
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70 return "480 User not responding";
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71 case GSM48_CC_CAUSE_RESOURCE_UNAVAIL:
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72 return "503 GSM network resource unavailable";
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73 case GSM48_CC_CAUSE_TEMP_FAILURE:
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74 return "503 Temporary failure";
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75 case GSM48_CC_CAUSE_SWITCH_CONG:
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76 return "503 Switch congestion at MSC";
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77 case GSM48_CC_CAUSE_USER_BUSY:
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78 return "486 User busy";
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79 case GSM48_CC_CAUSE_DEST_OOO:
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80 return "502 Destination out of order";
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81 case GSM48_CC_CAUSE_NETWORK_OOO:
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82 return "503 Network out of order";
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83 default:
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84 return "480 Unavailable (unspecified)";
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85 }
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86 }
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87
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88 void
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89 disconnect_sip(call, cause)
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90 struct call *call;
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91 struct gsm_mncc_cause *cause;
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92 {
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93 switch (call->sip_state) {
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94 case SIP_STATE_INVITE_PROC:
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95 case SIP_STATE_RINGING:
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96 case SIP_STATE_RINGING_REL:
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97 strcpy(call->invite_fail, cause_to_invite_err(cause));
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98 signal_invite_error(call);
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99 break;
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100 case SIP_STATE_INVITE_200:
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101 /* have to wait for SIP ACK, then send BYE */
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102 break;
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103 case SIP_STATE_CONNECTED:
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104 initiate_bye(call);
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105 break;
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106 }
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107 }