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annotate sip-in/shutdown.c @ 275:def9f6e4f49e default tip

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doc/Use-outside-USA: Fake-NANP-numbers article is here
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 27 Nov 2023 21:49:19 -0800
parents c1c94b7fc2e2
children
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1 /*
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2 * In this module we handle the scenarios of themwi-mncc and/or themwi-mgw
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3 * shutting down while we are connected to them. In both scenarios we
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4 * terminate all active calls (graceful disconnect signaling toward SIP
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5 * callers and toward whichever ThemWi daemon is still running, if either),
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6 * but our themwi-sip-in process itself stays running. This way once
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7 * the other required processes restart, inbound calls will start working
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8 * once again, without needing to restart themwi-sip-in.
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9 */
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10
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11 #include <sys/types.h>
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12 #include <sys/socket.h>
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13 #include <sys/time.h>
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14 #include <netinet/in.h>
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15 #include <stdio.h>
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16 #include <stdint.h>
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17 #include <stdlib.h>
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18 #include <string.h>
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19 #include <strings.h>
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20 #include <syslog.h>
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21 #include "../include/mncc.h"
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22 #include "../include/gsm48_const.h"
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23 #include "call.h"
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24
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25 extern struct call *call_list;
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26
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27 static struct gsm_mncc_cause shutdown_cause = {
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28 .coding = GSM48_CAUSE_CODING_GSM,
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29 .location = GSM48_CAUSE_LOC_PRN_S_LU,
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30 .value = GSM48_CC_CAUSE_NETWORK_OOO,
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31 };
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32
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33 void
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34 shutdown_gsm_conn()
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35 {
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36 struct call *call;
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37
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38 for (call = call_list; call; call = call->next) {
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39 call->mncc_state = MNCC_STATE_NO_EXIST;
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40 if (call->overall_state != OVERALL_STATE_DEAD_SIP) {
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41 call->overall_state = OVERALL_STATE_TEARDOWN;
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42 disconnect_tmgw(call);
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43 disconnect_sip(call, &shutdown_cause);
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44 transition_dead_sip(call);
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45 }
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46 }
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47 }
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48
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49 void
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50 shutdown_mgw_conn()
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51 {
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52 struct call *call;
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53
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54 for (call = call_list; call; call = call->next) {
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55 call->mgw_state = MGW_STATE_NO_EXIST;
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56 call->mgw_xact = 0;
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57 if (call->overall_state != OVERALL_STATE_DEAD_SIP) {
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58 call->overall_state = OVERALL_STATE_TEARDOWN;
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59 disconnect_mncc(call, GSM48_CAUSE_LOC_PRN_S_LU,
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60 GSM48_CC_CAUSE_NETWORK_OOO);
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61 disconnect_sip(call, &shutdown_cause);
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62 transition_dead_sip(call);
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63 }
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64 }
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65 }