FreeCalypso > hg > themwi-system-sw

annotate sip-in/invite.c @ 53:2423f3aac4ce

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libsip: SDP parsing implemented
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 08 Sep 2022 10:45:50 -0800
parents 36a30349b490
children f1d59210f7b2
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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:
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2 * Here we implement our handling of SIP INVITE method.
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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3 */
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
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4
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
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5 #include <sys/types.h>
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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6 #include <sys/socket.h>
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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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:
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9 #include <stdlib.h>
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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10 #include <string.h>
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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11 #include <strings.h>
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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12 #include <syslog.h>
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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13 #include <unistd.h>
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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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"
48
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 #include "../libsip/out_msg.h"
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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19
49
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
20 extern int cfg_use_100rel;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
21
50
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
22 extern char *get_single_header();
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
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23
48
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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24 void
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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25 handle_sip_invite(req, ess, sin)
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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26 struct sip_pkt_rx *req;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 struct uas_parse_hdrs *ess;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 struct sockaddr_in *sin;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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29 {
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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30 char uri_user[13], *called_nanp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 struct sip_msg_out resp;
51
36a30349b490 sip-in: parse INVITE From header
Mychaela Falconia <falcon@freecalypso.org>
parents: 50
diff changeset
32 struct grok_from gfrom;
49
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
33 struct supported_ext supp_ext;
50
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
34 char *hval, *unsup_ext;
49
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
35 int ext_100rel_req, ext_100rel_sup, use_100rel;
48
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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36 int rc;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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37
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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38 /* check for existing Call-ID will go here */
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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39 /* extract called number from Request-URI */
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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40 rc = user_from_sip_uri(req->req_uri, uri_user, 12);
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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41 if (rc < 0) {
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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42 not_nanp: start_response_out_msg(&resp,
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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43 "416 Request-URI is not a NANP number");
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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44 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
45 if (rc < 0) {
49
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
46 error_resp_toolong: syslog(LOG_ERR,
48
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 "INVITE error response length exceeded");
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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48 return;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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49 }
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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50 out_msg_finish(&resp);
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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51 sip_tx_packet(&resp, sin);
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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52 return;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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53 }
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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54 if (uri_user[0] == '+') {
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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55 if (grok_number_string(uri_user+1, 0) != 11 ||
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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56 uri_user[1] != '1')
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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57 goto not_nanp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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58 called_nanp = uri_user + 2;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 } else switch (grok_number_string(uri_user)) {
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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60 case 10:
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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61 called_nanp = uri_user;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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62 break;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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63 case 11:
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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64 if (uri_user[0] != '1')
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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65 goto not_nanp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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66 called_nanp = uri_user + 1;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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67 break;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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68 default:
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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69 goto not_nanp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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70 }
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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71 if (!is_nanp_valid_prefix(called_nanp))
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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72 goto not_nanp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73 /* it is valid NANP - but is it one of ours? */
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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74 refresh_number_db();
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75 if (!is_nanp_locally_owned(called_nanp)) {
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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76 start_response_out_msg(&resp,
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
77 "404 Called number does not belong here");
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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78 goto error_resp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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79 }
51
36a30349b490 sip-in: parse INVITE From header
Mychaela Falconia <falcon@freecalypso.org>
parents: 50
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80 /* parse and validate From header */
36a30349b490 sip-in: parse INVITE From header
Mychaela Falconia <falcon@freecalypso.org>
parents: 50
diff changeset
81 rc = grok_from_header(ess->from, &gfrom);
36a30349b490 sip-in: parse INVITE From header
Mychaela Falconia <falcon@freecalypso.org>
parents: 50
diff changeset
82 if (rc < 0) {
36a30349b490 sip-in: parse INVITE From header
Mychaela Falconia <falcon@freecalypso.org>
parents: 50
diff changeset
83 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
84 goto error_resp;
36a30349b490 sip-in: parse INVITE From header
Mychaela Falconia <falcon@freecalypso.org>
parents: 50
diff changeset
85 }
49
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
86 /* check 100rel and catch any unsupported requirements */
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
87 supp_ext.name = "100rel";
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
88 supp_ext.req_flag = &ext_100rel_req;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
89 supp_ext.sup_flag = &ext_100rel_sup;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
90 ext_100rel_req = ext_100rel_sup = 0;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
91 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
92 if (rc < 0) {
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
93 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
94 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
95 if (rc < 0)
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
96 goto error_resp_toolong;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
97 goto error_resp;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
98 }
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
99 if (ext_100rel_req)
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
100 use_100rel = 1;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
101 else if (ext_100rel_sup)
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
102 use_100rel = cfg_use_100rel;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
103 else
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
104 use_100rel = 0;
50
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
105 /* 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
106 if (!req->msg_body_len) {
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
107 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
108 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
109 if (rc < 0)
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
110 goto error_resp_toolong;
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
111 goto error_resp;
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
112 }
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
113 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
114 if (!hval) {
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
115 start_response_out_msg(&resp,
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
116 "415 Missing Content-Type header");
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
117 goto error_415;
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
118 }
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
119 if (strcasecmp(hval, "application/sdp")) {
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
120 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
121 goto error_415;
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
122 }
48
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 /*
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 * Remaining checks to be implemented:
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 * SDP message body
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 */
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 }