FreeCalypso > hg > themwi-system-sw

annotate sip-in/invite.c @ 57:d61d0136f6a5

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sip-in INVITE processing: return "GSM service is offline" indication
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 08 Sep 2022 13:39:42 -0800
parents f1d59210f7b2
children 02761f1ae5e5
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
48
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 * Here we implement our handling of SIP INVITE method.
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
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3 */
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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4
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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5 #include <sys/types.h>
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 #include <sys/socket.h>
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 #include <netinet/in.h>
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 #include <stdio.h>
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 #include <stdlib.h>
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 #include <string.h>
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 #include <strings.h>
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 #include <syslog.h>
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 #include <unistd.h>
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 #include "../libsip/parse.h"
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 #include "../libsip/uas_basic.h"
51
36a30349b490 sip-in: parse INVITE From header
Mychaela Falconia <falcon@freecalypso.org>
parents: 50
diff changeset
16 #include "../libsip/grok_from.h"
49
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
17 #include "../libsip/req_supp.h"
55
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
18 #include "../libsip/sdp.h"
48
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 #include "../libsip/out_msg.h"
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20
55
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
21 extern struct in_addr sip_bind_ip;
49
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
22 extern int cfg_use_100rel;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
23
50
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
24 extern char *get_single_header();
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
25
48
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 void
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 handle_sip_invite(req, ess, sin)
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 struct sip_pkt_rx *req;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 struct uas_parse_hdrs *ess;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 struct sockaddr_in *sin;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 {
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 char uri_user[13], *called_nanp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 struct sip_msg_out resp;
51
36a30349b490 sip-in: parse INVITE From header
Mychaela Falconia <falcon@freecalypso.org>
parents: 50
diff changeset
34 struct grok_from gfrom;
49
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
35 struct supported_ext supp_ext;
50
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
36 char *hval, *unsup_ext;
55
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
37 int ext_100rel_req, ext_100rel_sup, use_100rel, use_pcma;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
38 struct sdp_parse sdp_parse;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
39 struct sdp_gen sdp_gen;
48
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 int rc;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 /* check for existing Call-ID will go here */
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 /* extract called number from Request-URI */
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 rc = user_from_sip_uri(req->req_uri, uri_user, 12);
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 if (rc < 0) {
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 not_nanp: start_response_out_msg(&resp,
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 "416 Request-URI is not a NANP number");
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48 error_resp: rc = add_resp_basic_headers(&resp, ess, req->req_method);
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49 if (rc < 0) {
49
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
50 error_resp_toolong: syslog(LOG_ERR,
48
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51 "INVITE error response length exceeded");
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52 return;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53 }
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54 out_msg_finish(&resp);
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55 sip_tx_packet(&resp, sin);
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 return;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 }
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58 if (uri_user[0] == '+') {
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 if (grok_number_string(uri_user+1, 0) != 11 ||
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
60 uri_user[1] != '1')
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
61 goto not_nanp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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62 called_nanp = uri_user + 2;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
63 } else switch (grok_number_string(uri_user)) {
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
64 case 10:
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
65 called_nanp = uri_user;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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66 break;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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67 case 11:
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
68 if (uri_user[0] != '1')
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
69 goto not_nanp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
70 called_nanp = uri_user + 1;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
71 break;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
72 default:
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73 goto not_nanp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
74 }
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75 if (!is_nanp_valid_prefix(called_nanp))
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
76 goto not_nanp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
77 /* it is valid NANP - but is it one of ours? */
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
78 refresh_number_db();
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
79 if (!is_nanp_locally_owned(called_nanp)) {
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
80 start_response_out_msg(&resp,
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
81 "404 Called number does not belong here");
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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82 goto error_resp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
83 }
51
36a30349b490 sip-in: parse INVITE From header
Mychaela Falconia <falcon@freecalypso.org>
parents: 50
diff changeset
84 /* parse and validate From header */
36a30349b490 sip-in: parse INVITE From header
Mychaela Falconia <falcon@freecalypso.org>
parents: 50
diff changeset
85 rc = grok_from_header(ess->from, &gfrom);
36a30349b490 sip-in: parse INVITE From header
Mychaela Falconia <falcon@freecalypso.org>
parents: 50
diff changeset
86 if (rc < 0) {
36a30349b490 sip-in: parse INVITE From header
Mychaela Falconia <falcon@freecalypso.org>
parents: 50
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87 start_response_out_msg(&resp, "400 Malformed From header");
36a30349b490 sip-in: parse INVITE From header
Mychaela Falconia <falcon@freecalypso.org>
parents: 50
diff changeset
88 goto error_resp;
36a30349b490 sip-in: parse INVITE From header
Mychaela Falconia <falcon@freecalypso.org>
parents: 50
diff changeset
89 }
49
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
90 /* check 100rel and catch any unsupported requirements */
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
91 supp_ext.name = "100rel";
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
92 supp_ext.req_flag = &ext_100rel_req;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
93 supp_ext.sup_flag = &ext_100rel_sup;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
94 ext_100rel_req = ext_100rel_sup = 0;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
95 rc = parse_require_supported(req, &supp_ext, 1, &unsup_ext);
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
96 if (rc < 0) {
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
97 start_response_out_msg(&resp, "420 Extension not supported");
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
98 rc = out_msg_add_header(&resp, "Unsupported", unsup_ext);
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
99 if (rc < 0)
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
100 goto error_resp_toolong;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
101 goto error_resp;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
102 }
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
103 if (ext_100rel_req)
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
104 use_100rel = 1;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
105 else if (ext_100rel_sup)
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
106 use_100rel = cfg_use_100rel;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
107 else
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
108 use_100rel = 0;
50
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
109 /* did the caller send an SDP message body? */
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
110 if (!req->msg_body_len) {
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
111 start_response_out_msg(&resp, "415 Missing SDP body");
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
112 error_415: rc = out_msg_add_header(&resp, "Accept", "application/sdp");
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
113 if (rc < 0)
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
114 goto error_resp_toolong;
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
115 goto error_resp;
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
116 }
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
117 hval = get_single_header(req, "Content-Type", "c", (int *) 0);
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
118 if (!hval) {
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
119 start_response_out_msg(&resp,
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
120 "415 Missing Content-Type header");
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
121 goto error_415;
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
122 }
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
123 if (strcasecmp(hval, "application/sdp")) {
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
124 start_response_out_msg(&resp, "415 Unsupported Content-Type");
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
125 goto error_415;
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
126 }
55
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
127 rc = parse_incoming_sdp(req->msg_body, req->msg_body_len, &sdp_parse);
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
128 if (rc < 0) {
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
129 start_response_out_msg(&resp, "488 Malformed SDP body");
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
130 goto error_resp;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
131 }
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
132 switch (sdp_parse.codec_mask) {
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
133 case SDP_CODEC_MASK_PCMU:
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
134 case SDP_CODEC_MASK_BOTH:
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
135 use_pcma = 0;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
136 break;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
137 case SDP_CODEC_MASK_PCMA:
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
138 case SDP_CODEC_MASK_BOTH | SDP_CODEC_MASK_PCMA_PREF:
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
139 use_pcma = 1;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
140 break;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
141 default:
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
142 start_response_out_msg(&resp,
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
143 "488 Unsupported codec selection");
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
144 rc = add_resp_basic_headers(&resp, ess, req->req_method);
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
145 if (rc < 0)
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
146 goto error_resp_toolong;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
147 rc = out_msg_add_header(&resp, "Content-Type",
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
148 "application/sdp");
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
149 if (rc < 0)
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
150 goto error_resp_toolong;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
151 bzero(&sdp_gen, sizeof sdp_gen);
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
152 sdp_gen.owner_ip = sip_bind_ip;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
153 sdp_gen.conn_ip = sip_bind_ip;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
154 sdp_gen.codec_mask = SDP_CODEC_MASK_BOTH;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
155 rc = out_msg_finish_sdp(&resp, &sdp_gen);
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
156 if (rc < 0)
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
157 goto error_resp_toolong;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
158 sip_tx_packet(&resp, sin);
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
159 return;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
160 }
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
161 /* SIP INVITE validation done - check if GSM service is up */
57
d61d0136f6a5 sip-in INVITE processing: return "GSM service is offline" indication
Mychaela Falconia <falcon@freecalypso.org>
parents: 55
diff changeset
162 rc = connect_gsm_mtcall();
d61d0136f6a5 sip-in INVITE processing: return "GSM service is offline" indication
Mychaela Falconia <falcon@freecalypso.org>
parents: 55
diff changeset
163 if (rc < 0) {
d61d0136f6a5 sip-in INVITE processing: return "GSM service is offline" indication
Mychaela Falconia <falcon@freecalypso.org>
parents: 55
diff changeset
164 start_response_out_msg(&resp, "480 GSM service is offline");
d61d0136f6a5 sip-in INVITE processing: return "GSM service is offline" indication
Mychaela Falconia <falcon@freecalypso.org>
parents: 55
diff changeset
165 goto error_resp;
d61d0136f6a5 sip-in INVITE processing: return "GSM service is offline" indication
Mychaela Falconia <falcon@freecalypso.org>
parents: 55
diff changeset
166 }
d61d0136f6a5 sip-in INVITE processing: return "GSM service is offline" indication
Mychaela Falconia <falcon@freecalypso.org>
parents: 55
diff changeset
167 /* stateful processing begins */
48
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 }