FreeCalypso > hg > themwi-system-sw

annotate sip-in/invite.c @ 50:daf1c26d7ae2

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sip-in: check INVITE Content-Type header
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 06 Sep 2022 23:50:16 -0800
parents dec31b1a8b96
children 36a30349b490
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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>
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:
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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:
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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"
49
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
16 #include "../libsip/req_supp.h"
48
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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17 #include "../libsip/out_msg.h"
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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18
49
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
19 extern int cfg_use_100rel;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
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20
50
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
21 extern char *get_single_header();
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
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22
48
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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23 void
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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24 handle_sip_invite(req, ess, sin)
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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25 struct sip_pkt_rx *req;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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26 struct uas_parse_hdrs *ess;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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27 struct sockaddr_in *sin;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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28 {
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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29 char uri_user[13], *called_nanp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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30 struct sip_msg_out resp;
49
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
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31 struct supported_ext supp_ext;
50
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
32 char *hval, *unsup_ext;
49
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
33 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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34 int rc;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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35
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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36 /* 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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37 /* extract called number from Request-URI */
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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38 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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39 if (rc < 0) {
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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40 not_nanp: start_response_out_msg(&resp,
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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41 "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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42 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:
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43 if (rc < 0) {
49
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
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44 error_resp_toolong: syslog(LOG_ERR,
48
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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45 "INVITE error response length exceeded");
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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46 return;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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47 }
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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48 out_msg_finish(&resp);
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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49 sip_tx_packet(&resp, sin);
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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50 return;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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51 }
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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52 if (uri_user[0] == '+') {
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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53 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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54 uri_user[1] != '1')
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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55 goto not_nanp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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56 called_nanp = uri_user + 2;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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57 } else switch (grok_number_string(uri_user)) {
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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58 case 10:
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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59 called_nanp = uri_user;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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60 break;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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61 case 11:
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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62 if (uri_user[0] != '1')
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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63 goto not_nanp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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64 called_nanp = uri_user + 1;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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65 break;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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66 default:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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67 goto not_nanp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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68 }
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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69 if (!is_nanp_valid_prefix(called_nanp))
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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70 goto not_nanp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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71 /* 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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72 refresh_number_db();
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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73 if (!is_nanp_locally_owned(called_nanp)) {
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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74 start_response_out_msg(&resp,
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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75 "404 Called number does not belong here");
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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76 goto error_resp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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77 }
49
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
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78 /* check 100rel and catch any unsupported requirements */
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
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79 supp_ext.name = "100rel";
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
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80 supp_ext.req_flag = &ext_100rel_req;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
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81 supp_ext.sup_flag = &ext_100rel_sup;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
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82 ext_100rel_req = ext_100rel_sup = 0;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
83 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
84 if (rc < 0) {
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
85 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
86 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
87 if (rc < 0)
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
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88 goto error_resp_toolong;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
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89 goto error_resp;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
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90 }
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
91 if (ext_100rel_req)
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
92 use_100rel = 1;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
93 else if (ext_100rel_sup)
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
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94 use_100rel = cfg_use_100rel;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
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95 else
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
96 use_100rel = 0;
50
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
97 /* 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
98 if (!req->msg_body_len) {
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
99 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
100 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
101 if (rc < 0)
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
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102 goto error_resp_toolong;
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
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103 goto error_resp;
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
104 }
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
105 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
106 if (!hval) {
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
107 start_response_out_msg(&resp,
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
108 "415 Missing Content-Type header");
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
109 goto error_415;
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
110 }
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
111 if (strcasecmp(hval, "application/sdp")) {
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
112 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
113 goto error_415;
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
114 }
48
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
115 /*
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
116 * Remaining checks to be implemented:
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
117 * SDP message body
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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118 */
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119 }