FreeCalypso > hg > themwi-system-sw

annotate sip-in/retrans.c @ 108:0d6435808bcd

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sip-in: implement 100rel for 180 Ringing response
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 28 Sep 2022 14:29:10 -0800
parents 915f0f397fb6
children 9b87894704eb
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1 /*
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2 * In this module we handle retransmission of INVITE responses
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3 * and BYE requests.
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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/gsm48_const.h"
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16 #include "../libsip/out_msg.h"
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17 #include "call.h"
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18
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19 extern unsigned cfg_retrans_count;
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20 extern struct call *call_list;
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21
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22 void
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23 run_periodic_retrans()
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24 {
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25 struct call *call;
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26 struct sip_msg_out msg;
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27
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28 for (call = call_list; call; call = call->next) {
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29 switch (call->sip_state) {
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30 case SIP_STATE_RINGING_REL:
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31 if (call->sip_tx_count < cfg_retrans_count) {
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32 start_response_out_msg(&msg, "180 Ringing");
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33 fill_invite_resp_from_call(&msg, call);
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34 out_msg_add_header(&msg, "Require", "100rel");
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35 out_msg_add_header(&msg, "RSeq", "1");
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36 out_msg_finish(&msg);
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37 sip_tx_packet(&msg, &call->udp_sin);
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38 call->sip_tx_count++;
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39 } else {
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40 call->overall_state = OVERALL_STATE_TEARDOWN;
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41 disconnect_mncc(call, GSM48_CAUSE_LOC_PRN_S_LU,
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42 GSM48_CC_CAUSE_INTERWORKING);
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43 disconnect_tmgw(call);
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44 strcpy(call->invite_fail,
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45 "504 100rel retransmissions exhausted");
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46 signal_invite_error(call);
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47 }
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48 break;
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49 case SIP_STATE_INVITE_200:
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50 if (call->sip_tx_count < cfg_retrans_count) {
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51 fill_invite_200_resp(&msg, call);
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52 sip_tx_packet(&msg, &call->udp_sin);
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53 call->sip_tx_count++;
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54 } else {
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55 call->overall_state = OVERALL_STATE_TEARDOWN;
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56 disconnect_mncc(call, GSM48_CAUSE_LOC_PRN_S_LU,
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57 GSM48_CC_CAUSE_INTERWORKING);
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58 disconnect_tmgw(call);
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59 initiate_bye(call);
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60 }
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61 break;
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62 case SIP_STATE_INVITE_ERR:
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63 if (call->sip_tx_count < cfg_retrans_count) {
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64 start_response_out_msg(&msg, call->invite_fail);
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65 fill_invite_resp_from_call(&msg, call);
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66 out_msg_finish(&msg);
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67 sip_tx_packet(&msg, &call->udp_sin);
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68 call->sip_tx_count++;
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69 } else
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70 call->sip_state = SIP_STATE_ENDED;
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71 break;
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72 case SIP_STATE_BYE_SENT:
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73 if (call->sip_tx_count < cfg_retrans_count) {
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74 fill_bye_out_msg(&msg, call);
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75 sip_tx_packet(&msg, &call->udp_sin);
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76 call->sip_tx_count++;
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77 } else
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78 call->sip_state = SIP_STATE_ENDED;
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79 break;
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80 }
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81 }
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82 }