FreeCalypso > hg > themwi-system-sw

comparison sip-out/reinvite.c @ 165:9419fe55824f

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themwi-sip-out complete to the point of compiling and linking
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 12 Oct 2022 17:05:45 -0800
parents sip-manual-out/reinvite.c@b51247739897
children
comparison
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164:baaa6c1a3d3b 165:9419fe55824f
1 /*
2 * Here we handle incoming INVITE requests in the UAS role: even though
3 * we are strictly outbound, BulkVS servers will send us periodic
4 * re-INVITEs as keepalives, and we have to play along.
5 */
6
7 #include <sys/types.h>
8 #include <sys/socket.h>
9 #include <sys/time.h>
10 #include <netinet/in.h>
11 #include <stdio.h>
12 #include <stdint.h>
13 #include <stdlib.h>
14 #include <string.h>
15 #include <strings.h>
16 #include <syslog.h>
17 #include "../include/out_routes.h"
18 #include "../libsip/parse.h"
19 #include "../libsip/uas_basic.h"
20 #include "../libsip/out_msg.h"
21 #include "call.h"
22
23 extern struct call *find_call_by_sip_id();
24
25 static void
26 invite_found_call(req, ess, sin, call)
27 struct sip_pkt_rx *req;
28 struct uas_parse_hdrs *ess;
29 struct sockaddr_in *sin;
30 struct call *call;
31 {
32 struct sip_msg_out resp;
33 int rc;
34
35 switch (call->sip_state) {
36 case SIP_STATE_INV_SENT:
37 case SIP_STATE_100_RCVD:
38 start_response_out_msg(&resp, "491 Outbound INVITE pending");
39 break;
40 case SIP_STATE_CONNECTED:
41 start_response_out_msg(&resp, "200 OK");
42 break;
43 case SIP_STATE_CANCEL_SENT:
44 case SIP_STATE_BYE_SENT:
45 case SIP_STATE_ACCEPT_100:
46 case SIP_STATE_ACCEPT_200:
47 case SIP_STATE_ENDED:
48 start_response_out_msg(&resp, "488 Call terminated");
49 break;
50 case SIP_STATE_MSG_SIZE_ERR:
51 return;
52 default:
53 syslog(LOG_CRIT,
54 "FATAL: invalid SIP state 0x%x on incoming re-INVITE",
55 call->sip_state);
56 exit(1);
57 }
58 rc = add_resp_basic_headers(&resp, ess, req->req_method);
59 if (rc < 0) {
60 syslog(LOG_ERR, "Re-INVITE response message size error");
61 return;
62 }
63 out_msg_finish(&resp);
64 sip_tx_packet(&resp, sin);
65 }
66
67 static void
68 invite_unknown_call(req, ess, sin)
69 struct sip_pkt_rx *req;
70 struct uas_parse_hdrs *ess;
71 struct sockaddr_in *sin;
72 {
73 struct sip_msg_out resp;
74 int rc;
75
76 start_response_out_msg(&resp, "405 This gateway is outbound only");
77 rc = add_resp_basic_headers(&resp, ess, req->req_method);
78 if (rc < 0)
79 return;
80 out_msg_finish(&resp);
81 sip_tx_packet(&resp, sin);
82 }
83
84 void
85 handle_invite_req(req, ess, sin)
86 struct sip_pkt_rx *req;
87 struct uas_parse_hdrs *ess;
88 struct sockaddr_in *sin;
89 {
90 struct call *call;
91
92 call = find_call_by_sip_id(ess->call_id);
93 if (call)
94 invite_found_call(req, ess, sin, call);
95 else
96 invite_unknown_call(req, ess, sin);
97 }