FreeCalypso > hg > themwi-system-sw

comparison sip-in/invite_dup.c @ 145:4b685a5d9bd4

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sip-in code: split invite.c into 3 separate C modules
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 08 Oct 2022 19:31:05 -0800
parents sip-in/invite.c@c93c339271a7
children 54c2f271380d
comparison
equal deleted inserted replaced
144:4e16aeafbfbf 145:4b685a5d9bd4
1 /*
2 * Here we process SIP INVITE retransmissions and/or re-INVITEs
3 * for existing calls.
4 */
5
6 #include <sys/types.h>
7 #include <sys/socket.h>
8 #include <sys/time.h>
9 #include <netinet/in.h>
10 #include <stdio.h>
11 #include <stdint.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <strings.h>
15 #include <syslog.h>
16 #include "../libsip/parse.h"
17 #include "../libsip/uas_basic.h"
18 #include "../libsip/sdp.h"
19 #include "../libsip/out_msg.h"
20 #include "call.h"
21
22 void
23 invite_existing_call(req, ess, sin, call)
24 struct sip_pkt_rx *req;
25 struct uas_parse_hdrs *ess;
26 struct sockaddr_in *sin;
27 struct call *call;
28 {
29 struct sip_msg_out resp;
30 int rc;
31
32 if (ess->cseq_num != call->invite_cseq) {
33 start_response_out_msg(&resp, "501 Re-INVITE not supported");
34 rc = add_resp_basic_headers(&resp, ess, req->req_method);
35 if (rc < 0) {
36 syslog(LOG_ERR,
37 "sending 501 Re-INVITE error: response length exceeded");
38 return;
39 }
40 out_msg_finish(&resp);
41 sip_tx_packet(&resp, sin);
42 return;
43 }
44 /* it's a retransmission, not a re-INVITE */
45 switch (call->sip_state) {
46 case SIP_STATE_INVITE_PROC:
47 start_response_out_msg(&resp, "100 Proceeding");
48 fill_invite_resp_from_call(&resp, call);
49 out_msg_finish(&resp);
50 sip_tx_packet(&resp, sin);
51 return;
52 case SIP_STATE_RINGING:
53 start_response_out_msg(&resp, "180 Ringing");
54 fill_invite_resp_from_call(&resp, call);
55 out_msg_finish(&resp);
56 sip_tx_packet(&resp, sin);
57 return;
58 case SIP_STATE_RINGING_REL:
59 start_response_out_msg(&resp, "180 Ringing");
60 fill_invite_resp_from_call(&resp, call);
61 out_msg_add_header(&resp, "Require", "100rel");
62 out_msg_add_header(&resp, "RSeq", "1");
63 out_msg_finish(&resp);
64 sip_tx_packet(&resp, sin);
65 return;
66 case SIP_STATE_INVITE_200:
67 case SIP_STATE_CONNECTED:
68 fill_invite_200_resp(&resp, call);
69 sip_tx_packet(&resp, sin);
70 return;
71 case SIP_STATE_INVITE_ERR:
72 start_response_out_msg(&resp, call->invite_fail);
73 fill_invite_resp_from_call(&resp, call);
74 out_msg_finish(&resp);
75 sip_tx_packet(&resp, sin);
76 return;
77 default:
78 /* silently discard */
79 return;
80 }
81 }