FreeCalypso > hg > themwi-system-sw

annotate sip-in/invite.c @ 77:fe39404092d9

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sip-in: generate To tags
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 20 Sep 2022 16:49:24 -0800
parents 21276f045026
children ce3b1db7d1d7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
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2 * Here we implement our handling of SIP INVITE method.
8117d8ee44a5 sip-in: beginning of INVITE handling
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3 */
8117d8ee44a5 sip-in: beginning of INVITE handling
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4
8117d8ee44a5 sip-in: beginning of INVITE handling
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5 #include <sys/types.h>
8117d8ee44a5 sip-in: beginning of INVITE handling
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6 #include <sys/socket.h>
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
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7 #include <netinet/in.h>
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02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
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parents: 57
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8 #include <arpa/inet.h>
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8117d8ee44a5 sip-in: beginning of INVITE handling
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9 #include <stdio.h>
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02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
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10 #include <stdint.h>
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8117d8ee44a5 sip-in: beginning of INVITE handling
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11 #include <stdlib.h>
8117d8ee44a5 sip-in: beginning of INVITE handling
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12 #include <string.h>
8117d8ee44a5 sip-in: beginning of INVITE handling
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13 #include <strings.h>
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14 #include <syslog.h>
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5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
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15 #include "../include/gsm48_const.h"
48
8117d8ee44a5 sip-in: beginning of INVITE handling
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16 #include "../libsip/parse.h"
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
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17 #include "../libsip/uas_basic.h"
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36a30349b490 sip-in: parse INVITE From header
Mychaela Falconia <falcon@freecalypso.org>
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18 #include "../libsip/grok_from.h"
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dec31b1a8b96 sip-in: check Require and Supported
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19 #include "../libsip/req_supp.h"
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f1d59210f7b2 sip-in INVITE processing: grok SDP
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20 #include "../libsip/sdp.h"
48
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
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21 #include "../libsip/out_msg.h"
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22 #include "call.h"
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8117d8ee44a5 sip-in: beginning of INVITE handling
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23
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24 extern struct in_addr sip_bind_ip;
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25 extern unsigned sip_bind_port;
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26 extern int cfg_use_100rel;
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27 extern struct call *call_list;
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28
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02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
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29 extern struct call *find_call_by_sip_id();
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30 extern char *get_single_header();
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31
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32 fill_invite_resp_from_call(msg, call)
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33 struct sip_msg_out *msg;
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34 struct call *call;
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35 {
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36 char cseq_str[32];
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37 int rc;
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38
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39 rc = out_msg_add_header(msg, "From", call->invite_from);
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40 if (rc < 0)
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41 return rc;
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Mychaela Falconia <falcon@freecalypso.org>
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42 rc = out_msg_add_header(msg, "To", call->invite_to);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
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43 if (rc < 0)
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44 return rc;
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Mychaela Falconia <falcon@freecalypso.org>
parents: 57
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45 rc = out_msg_add_header(msg, "Call-ID", call->sip_call_id);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
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46 if (rc < 0)
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
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47 return rc;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
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48 sprintf(cseq_str, "%u INVITE", call->invite_cseq);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
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parents: 57
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49 rc = out_msg_add_header(msg, "CSeq", cseq_str);
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50 if (rc < 0)
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51 return rc;
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Mychaela Falconia <falcon@freecalypso.org>
parents: 57
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52 return out_msg_add_header(msg, "Via", call->invite_via);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
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parents: 57
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53 }
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parents: 57
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54
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55 fill_invite_200_resp(msg, call)
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
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parents: 57
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56 struct sip_msg_out *msg;
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parents: 57
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57 struct call *call;
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58 {
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59 char contact_str[80];
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60 struct sdp_gen sdp;
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parents: 57
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61 int rc;
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62
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63 start_response_out_msg(msg, "200 CONNECT");
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
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64 rc = fill_invite_resp_from_call(msg, call);
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parents: 57
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65 if (rc < 0)
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parents: 57
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66 return rc;
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Mychaela Falconia <falcon@freecalypso.org>
parents: 57
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67 sprintf(contact_str, "<sip:%s:%u;transport=udp>",
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
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68 inet_ntoa(sip_bind_ip), sip_bind_port);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
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69 rc = out_msg_add_header(msg, "Contact", contact_str);
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parents: 57
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70 if (rc < 0)
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71 return rc;
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parents: 57
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72 rc = out_msg_add_header(msg, "Content-Type", "application/sdp");
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parents: 57
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73 if (rc < 0)
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74 return rc;
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Mychaela Falconia <falcon@freecalypso.org>
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75 bzero(&sdp, sizeof sdp);
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Mychaela Falconia <falcon@freecalypso.org>
parents: 57
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76 sdp.conn_ip = call->pstn_rtp_local.sin_addr;
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parents: 57
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77 sdp.conn_port = ntohs(call->pstn_rtp_local.sin_port);
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Mychaela Falconia <falcon@freecalypso.org>
parents: 57
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78 sdp.codec_mask = call->use_pcma ? SDP_CODEC_MASK_PCMA
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79 : SDP_CODEC_MASK_PCMU;
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Mychaela Falconia <falcon@freecalypso.org>
parents: 57
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80 sdp.session_id = (sdp.conn_port << 16) | call->sdp_addend;
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Mychaela Falconia <falcon@freecalypso.org>
parents: 57
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81 sdp.owner_ip = sip_bind_ip;
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Mychaela Falconia <falcon@freecalypso.org>
parents: 57
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82 return out_msg_finish_sdp(msg, &sdp);
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parents: 57
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83 }
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parents: 57
diff changeset
84
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85 static void
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86 invite_new_call(req, ess, sin)
48
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87 struct sip_pkt_rx *req;
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88 struct uas_parse_hdrs *ess;
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Mychaela Falconia <falcon@freecalypso.org>
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89 struct sockaddr_in *sin;
8117d8ee44a5 sip-in: beginning of INVITE handling
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90 {
77
fe39404092d9 sip-in: generate To tags
Mychaela Falconia <falcon@freecalypso.org>
parents: 76
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91 static unsigned cycle_tag_num, cycle_sdp_addend;
48
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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92 char uri_user[13], *called_nanp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
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93 struct sip_msg_out resp;
51
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Mychaela Falconia <falcon@freecalypso.org>
parents: 50
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94 struct grok_from gfrom;
49
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
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95 struct supported_ext supp_ext;
50
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
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96 char *hval, *unsup_ext;
55
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
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97 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
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98 struct sdp_parse sdp_parse;
f1d59210f7b2 sip-in INVITE processing: grok SDP
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parents: 51
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99 struct sdp_gen sdp_gen;
60
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parents: 57
diff changeset
100 struct call *call;
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Mychaela Falconia <falcon@freecalypso.org>
parents: 57
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101 char *dp;
76
21276f045026 sip-in: validate To header prior to tag addition
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
102 unsigned req_uri_len, to_hdr_len, copylen;
48
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parents:
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103 int rc;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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104
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Mychaela Falconia <falcon@freecalypso.org>
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105 /* extract called number from Request-URI */
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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106 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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107 if (rc < 0) {
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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108 not_nanp: start_response_out_msg(&resp,
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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109 "416 Request-URI is not a NANP number");
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
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110 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
111 if (rc < 0) {
49
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
112 error_resp_toolong: syslog(LOG_ERR,
60
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
113 "INVITE early error response length exceeded");
48
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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114 return;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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115 }
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
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116 out_msg_finish(&resp);
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
117 sip_tx_packet(&resp, sin);
60
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
118 return;
48
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
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119 }
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
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120 if (uri_user[0] == '+') {
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 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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122 uri_user[1] != '1')
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
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123 goto not_nanp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 called_nanp = uri_user + 2;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 } else switch (grok_number_string(uri_user)) {
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 case 10:
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 called_nanp = uri_user;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 break;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 case 11:
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 if (uri_user[0] != '1')
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 goto not_nanp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 called_nanp = uri_user + 1;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 break;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 default:
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 goto not_nanp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 }
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 if (!is_nanp_valid_prefix(called_nanp))
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 goto not_nanp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 /* 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
140 refresh_number_db();
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 if (!is_nanp_locally_owned(called_nanp)) {
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 start_response_out_msg(&resp,
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 "404 Called number does not belong here");
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 goto error_resp;
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 }
51
36a30349b490 sip-in: parse INVITE From header
Mychaela Falconia <falcon@freecalypso.org>
parents: 50
diff changeset
146 /* parse and validate From header */
36a30349b490 sip-in: parse INVITE From header
Mychaela Falconia <falcon@freecalypso.org>
parents: 50
diff changeset
147 rc = grok_from_header(ess->from, &gfrom);
36a30349b490 sip-in: parse INVITE From header
Mychaela Falconia <falcon@freecalypso.org>
parents: 50
diff changeset
148 if (rc < 0) {
36a30349b490 sip-in: parse INVITE From header
Mychaela Falconia <falcon@freecalypso.org>
parents: 50
diff changeset
149 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
150 goto error_resp;
36a30349b490 sip-in: parse INVITE From header
Mychaela Falconia <falcon@freecalypso.org>
parents: 50
diff changeset
151 }
76
21276f045026 sip-in: validate To header prior to tag addition
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
152 /* validate To header for the purpose of tag addition */
21276f045026 sip-in: validate To header prior to tag addition
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
153 req_uri_len = strlen(req->req_uri);
21276f045026 sip-in: validate To header prior to tag addition
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
154 to_hdr_len = strlen(ess->to);
21276f045026 sip-in: validate To header prior to tag addition
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
155 if (to_hdr_len == req_uri_len) {
21276f045026 sip-in: validate To header prior to tag addition
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
156 if (strcasecmp(ess->to, req->req_uri)) {
21276f045026 sip-in: validate To header prior to tag addition
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
157 bad_to_header: start_response_out_msg(&resp, "400 Bad To header");
21276f045026 sip-in: validate To header prior to tag addition
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
158 goto error_resp;
21276f045026 sip-in: validate To header prior to tag addition
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
159 }
21276f045026 sip-in: validate To header prior to tag addition
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
160 } else if (to_hdr_len == req_uri_len + 2) {
21276f045026 sip-in: validate To header prior to tag addition
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
161 if (ess->to[0] != '<')
21276f045026 sip-in: validate To header prior to tag addition
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
162 goto bad_to_header;
21276f045026 sip-in: validate To header prior to tag addition
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
163 if (strncasecmp(ess->to+1, req->req_uri, req_uri_len))
21276f045026 sip-in: validate To header prior to tag addition
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
164 goto bad_to_header;
21276f045026 sip-in: validate To header prior to tag addition
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
165 if (ess->to[req_uri_len+1] != '>')
21276f045026 sip-in: validate To header prior to tag addition
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
166 goto bad_to_header;
21276f045026 sip-in: validate To header prior to tag addition
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
167 } else
21276f045026 sip-in: validate To header prior to tag addition
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
168 goto bad_to_header;
49
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
169 /* check 100rel and catch any unsupported requirements */
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
170 supp_ext.name = "100rel";
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
171 supp_ext.req_flag = &ext_100rel_req;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
172 supp_ext.sup_flag = &ext_100rel_sup;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
173 ext_100rel_req = ext_100rel_sup = 0;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
174 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
175 if (rc < 0) {
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
176 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
177 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
178 if (rc < 0)
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
179 goto error_resp_toolong;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
180 goto error_resp;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
181 }
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
182 if (ext_100rel_req)
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
183 use_100rel = 1;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
184 else if (ext_100rel_sup)
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
185 use_100rel = cfg_use_100rel;
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
186 else
dec31b1a8b96 sip-in: check Require and Supported
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
187 use_100rel = 0;
50
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
188 /* 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
189 if (!req->msg_body_len) {
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
190 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
191 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
192 if (rc < 0)
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
193 goto error_resp_toolong;
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
194 goto error_resp;
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
195 }
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
196 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
197 if (!hval) {
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
198 start_response_out_msg(&resp,
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
199 "415 Missing Content-Type header");
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
200 goto error_415;
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
201 }
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
202 if (strcasecmp(hval, "application/sdp")) {
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
203 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
204 goto error_415;
daf1c26d7ae2 sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
205 }
55
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
206 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
207 if (rc < 0) {
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
208 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
209 goto error_resp;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
210 }
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
211 switch (sdp_parse.codec_mask) {
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
212 case SDP_CODEC_MASK_PCMU:
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
213 case SDP_CODEC_MASK_BOTH:
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
214 use_pcma = 0;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
215 break;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
216 case SDP_CODEC_MASK_PCMA:
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
217 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
218 use_pcma = 1;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
219 break;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
220 default:
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
221 start_response_out_msg(&resp,
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
222 "488 Unsupported codec selection");
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
223 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
224 if (rc < 0)
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
225 goto error_resp_toolong;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
226 rc = out_msg_add_header(&resp, "Content-Type",
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
227 "application/sdp");
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
228 if (rc < 0)
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
229 goto error_resp_toolong;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
230 bzero(&sdp_gen, sizeof sdp_gen);
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
231 sdp_gen.owner_ip = sip_bind_ip;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
232 sdp_gen.conn_ip = sip_bind_ip;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
233 sdp_gen.codec_mask = SDP_CODEC_MASK_BOTH;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
234 rc = out_msg_finish_sdp(&resp, &sdp_gen);
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
235 if (rc < 0)
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
236 goto error_resp_toolong;
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
237 sip_tx_packet(&resp, sin);
60
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
238 return;
55
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
239 }
f1d59210f7b2 sip-in INVITE processing: grok SDP
Mychaela Falconia <falcon@freecalypso.org>
parents: 51
diff changeset
240 /* 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
241 rc = connect_gsm_mtcall();
d61d0136f6a5 sip-in INVITE processing: return "GSM service is offline" indication
Mychaela Falconia <falcon@freecalypso.org>
parents: 55
diff changeset
242 if (rc < 0) {
d61d0136f6a5 sip-in INVITE processing: return "GSM service is offline" indication
Mychaela Falconia <falcon@freecalypso.org>
parents: 55
diff changeset
243 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
244 goto error_resp;
d61d0136f6a5 sip-in INVITE processing: return "GSM service is offline" indication
Mychaela Falconia <falcon@freecalypso.org>
parents: 55
diff changeset
245 }
d61d0136f6a5 sip-in INVITE processing: return "GSM service is offline" indication
Mychaela Falconia <falcon@freecalypso.org>
parents: 55
diff changeset
246 /* stateful processing begins */
60
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
247 call = malloc(sizeof(struct call) + strlen(ess->call_id) +
77
fe39404092d9 sip-in: generate To tags
Mychaela Falconia <falcon@freecalypso.org>
parents: 76
diff changeset
248 strlen(ess->from) + req_uri_len + strlen(ess->via) + 19);
60
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
249 if (!call) {
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
250 syslog(LOG_CRIT, "failed malloc for incoming call!");
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
251 start_response_out_msg(&resp,
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
252 "503 Gateway resource allocation failure");
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
253 goto error_resp;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
254 }
77
fe39404092d9 sip-in: generate To tags
Mychaela Falconia <falcon@freecalypso.org>
parents: 76
diff changeset
255 cycle_tag_num++;
fe39404092d9 sip-in: generate To tags
Mychaela Falconia <falcon@freecalypso.org>
parents: 76
diff changeset
256 if (cycle_tag_num >= 1000000)
fe39404092d9 sip-in: generate To tags
Mychaela Falconia <falcon@freecalypso.org>
parents: 76
diff changeset
257 cycle_tag_num = 0;
fe39404092d9 sip-in: generate To tags
Mychaela Falconia <falcon@freecalypso.org>
parents: 76
diff changeset
258 cycle_sdp_addend++;
fe39404092d9 sip-in: generate To tags
Mychaela Falconia <falcon@freecalypso.org>
parents: 76
diff changeset
259 if (cycle_sdp_addend >= 0x10000)
fe39404092d9 sip-in: generate To tags
Mychaela Falconia <falcon@freecalypso.org>
parents: 76
diff changeset
260 cycle_sdp_addend = 0;
60
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
261 bzero(call, sizeof(struct call));
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
262 dp = (char *)(call + 1);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
263 copylen = strlen(ess->call_id) + 1;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
264 call->sip_call_id = dp;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
265 bcopy(ess->call_id, dp, copylen);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
266 dp += copylen;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
267 copylen = strlen(ess->from) + 1;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
268 call->invite_from = dp;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
269 bcopy(ess->from, dp, copylen);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
270 dp += copylen;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
271 call->invite_to = dp;
77
fe39404092d9 sip-in: generate To tags
Mychaela Falconia <falcon@freecalypso.org>
parents: 76
diff changeset
272 *dp++ = '<';
fe39404092d9 sip-in: generate To tags
Mychaela Falconia <falcon@freecalypso.org>
parents: 76
diff changeset
273 bcopy(req->req_uri, dp, req_uri_len);
fe39404092d9 sip-in: generate To tags
Mychaela Falconia <falcon@freecalypso.org>
parents: 76
diff changeset
274 dp += req_uri_len;
fe39404092d9 sip-in: generate To tags
Mychaela Falconia <falcon@freecalypso.org>
parents: 76
diff changeset
275 *dp++ = '>';
fe39404092d9 sip-in: generate To tags
Mychaela Falconia <falcon@freecalypso.org>
parents: 76
diff changeset
276 sprintf(dp, ";tag=in%06u", cycle_tag_num);
fe39404092d9 sip-in: generate To tags
Mychaela Falconia <falcon@freecalypso.org>
parents: 76
diff changeset
277 dp += 14;
60
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
278 copylen = strlen(ess->via) + 1;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
279 call->invite_via = dp;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
280 bcopy(ess->via, dp, copylen);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
281 call->invite_cseq = ess->cseq_num;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
282 bcopy(sin, &call->udp_sin, sizeof(struct sockaddr_in));
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
283 bcopy(called_nanp, call->called_nanp, 11);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
284 call->from_uri = call->invite_from + (gfrom.uri - ess->from);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
285 call->from_uri_len = gfrom.uri_len;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
286 call->from_user = call->invite_from + (gfrom.user - ess->from);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
287 call->from_user_len = gfrom.user_len;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
288 call->use_100rel = use_100rel;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
289 call->pstn_rtp_remote.sin_family = AF_INET;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
290 call->pstn_rtp_remote.sin_addr = sdp_parse.ip_addr;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
291 call->pstn_rtp_remote.sin_port = htons(sdp_parse.audio_port);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
292 call->use_pcma = use_pcma;
77
fe39404092d9 sip-in: generate To tags
Mychaela Falconia <falcon@freecalypso.org>
parents: 76
diff changeset
293 call->sdp_addend = cycle_sdp_addend;
60
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
294 /* generate 100 response */
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
295 start_response_out_msg(&resp, "100 Proceeding");
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
296 rc = fill_invite_resp_from_call(&resp, call);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
297 if (rc < 0) {
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
298 syslog(LOG_ERR, "INVITE 100 response length exceeded");
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
299 free(call);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
300 return;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
301 }
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
302 out_msg_finish(&resp);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
303 sip_tx_packet(&resp, sin);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
304 /* add to call list */
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
305 call->next = call_list;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
306 call_list = call;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
307 /* send CRCX to TMGW */
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
308 tmgw_send_crcx(call);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
309 call->overall_state = OVERALL_STATE_CRCX;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
310 call->sip_state = SIP_STATE_INVITE_PROC;
48
8117d8ee44a5 sip-in: beginning of INVITE handling
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
311 }
60
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
312
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
313 static void
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
314 invite_existing_call(req, ess, sin, call)
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
315 struct sip_pkt_rx *req;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
316 struct uas_parse_hdrs *ess;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
317 struct sockaddr_in *sin;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
318 struct call *call;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
319 {
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
320 struct sip_msg_out resp;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
321 int rc;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
322
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
323 if (ess->cseq_num != call->invite_cseq) {
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
324 start_response_out_msg(&resp, "501 Re-INVITE not supported");
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
325 rc = add_resp_basic_headers(&resp, ess, req->req_method);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
326 if (rc < 0) {
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
327 syslog(LOG_ERR,
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
328 "sending 501 Re-INVITE error: response length exceeded");
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
329 return;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
330 }
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
331 out_msg_finish(&resp);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
332 sip_tx_packet(&resp, sin);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
333 return;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
334 }
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
335 /* it's a retransmission, not a re-INVITE */
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
336 switch (call->sip_state) {
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
337 case SIP_STATE_INVITE_PROC:
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
338 start_response_out_msg(&resp, "100 Proceeding");
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
339 fill_invite_resp_from_call(&resp, call);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
340 out_msg_finish(&resp);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
341 sip_tx_packet(&resp, sin);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
342 return;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
343 case SIP_STATE_RINGING:
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
344 case SIP_STATE_RINGING_PRACK:
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
345 start_response_out_msg(&resp, "180 Ringing");
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
346 fill_invite_resp_from_call(&resp, call);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
347 out_msg_finish(&resp);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
348 sip_tx_packet(&resp, sin);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
349 return;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
350 case SIP_STATE_INVITE_200:
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
351 case SIP_STATE_CONNECTED:
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
352 fill_invite_200_resp(&resp, call);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
353 sip_tx_packet(&resp, sin);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
354 return;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
355 case SIP_STATE_INVITE_ERR:
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
356 start_response_out_msg(&resp, call->invite_fail);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
357 fill_invite_resp_from_call(&resp, call);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
358 out_msg_finish(&resp);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
359 sip_tx_packet(&resp, sin);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
360 return;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
361 default:
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
362 /* silently discard */
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
363 return;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
364 }
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
365 }
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
366
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
367 void
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
368 handle_sip_invite(req, ess, sin)
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
369 struct sip_pkt_rx *req;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
370 struct uas_parse_hdrs *ess;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
371 struct sockaddr_in *sin;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
372 {
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
373 struct call *call;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
374
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
375 call = find_call_by_sip_id(ess->call_id);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
376 if (call)
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
377 invite_existing_call(req, ess, sin, call);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
378 else
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
379 invite_new_call(req, ess, sin);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
380 }
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
381
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
382 void
65
7c0309df59f8 sip-in: handling of ALERTING state
Mychaela Falconia <falcon@freecalypso.org>
parents: 60
diff changeset
383 signal_invite_ringing(call)
7c0309df59f8 sip-in: handling of ALERTING state
Mychaela Falconia <falcon@freecalypso.org>
parents: 60
diff changeset
384 struct call *call;
7c0309df59f8 sip-in: handling of ALERTING state
Mychaela Falconia <falcon@freecalypso.org>
parents: 60
diff changeset
385 {
7c0309df59f8 sip-in: handling of ALERTING state
Mychaela Falconia <falcon@freecalypso.org>
parents: 60
diff changeset
386 struct sip_msg_out resp;
7c0309df59f8 sip-in: handling of ALERTING state
Mychaela Falconia <falcon@freecalypso.org>
parents: 60
diff changeset
387
7c0309df59f8 sip-in: handling of ALERTING state
Mychaela Falconia <falcon@freecalypso.org>
parents: 60
diff changeset
388 start_response_out_msg(&resp, "180 Ringing");
7c0309df59f8 sip-in: handling of ALERTING state
Mychaela Falconia <falcon@freecalypso.org>
parents: 60
diff changeset
389 fill_invite_resp_from_call(&resp, call);
7c0309df59f8 sip-in: handling of ALERTING state
Mychaela Falconia <falcon@freecalypso.org>
parents: 60
diff changeset
390 out_msg_finish(&resp);
7c0309df59f8 sip-in: handling of ALERTING state
Mychaela Falconia <falcon@freecalypso.org>
parents: 60
diff changeset
391 sip_tx_packet(&resp, &call->udp_sin);
7c0309df59f8 sip-in: handling of ALERTING state
Mychaela Falconia <falcon@freecalypso.org>
parents: 60
diff changeset
392 call->sip_state = SIP_STATE_RINGING;
7c0309df59f8 sip-in: handling of ALERTING state
Mychaela Falconia <falcon@freecalypso.org>
parents: 60
diff changeset
393 }
7c0309df59f8 sip-in: handling of ALERTING state
Mychaela Falconia <falcon@freecalypso.org>
parents: 60
diff changeset
394
7c0309df59f8 sip-in: handling of ALERTING state
Mychaela Falconia <falcon@freecalypso.org>
parents: 60
diff changeset
395 void
66
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
396 signal_invite_200(call)
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
397 struct call *call;
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
398 {
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
399 struct sip_msg_out resp;
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
400 int rc;
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
401
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
402 rc = fill_invite_200_resp(&resp, call);
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
403 if (rc < 0) {
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
404 syslog(LOG_ERR, "INVITE 200 response length exceeded");
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
405 call->sip_state = SIP_STATE_MSG_SIZE_ERR;
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
406 call->overall_state = OVERALL_STATE_TEARDOWN;
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
407 disconnect_mncc(call, GSM48_CAUSE_LOC_PRN_S_LU,
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
408 GSM48_CC_CAUSE_INTERWORKING);
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
409 disconnect_tmgw(call);
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
410 /* TODO: transition from TEARDOWN to DEAD_SIP */
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
411 return;
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
412 }
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
413 sip_tx_packet(&resp, &call->udp_sin);
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
414 call->sip_state = SIP_STATE_INVITE_200;
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
415 call->sip_tx_count = 1;
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
416 }
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
417
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
418 void
60
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
419 signal_invite_error(call)
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
420 struct call *call;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
421 {
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
422 struct sip_msg_out resp;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
423 int rc;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
424
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
425 start_response_out_msg(&resp, call->invite_fail);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
426 rc = fill_invite_resp_from_call(&resp, call);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
427 if (rc < 0) {
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
428 syslog(LOG_ERR, "INVITE late error response length exceeded");
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
429 call->sip_state = SIP_STATE_MSG_SIZE_ERR;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
430 /* TODO: transition from TEARDOWN to DEAD_SIP */
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
431 return;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
432 }
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
433 out_msg_finish(&resp);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
434 sip_tx_packet(&resp, &call->udp_sin);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
435 call->sip_state = SIP_STATE_INVITE_ERR;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
436 call->sip_tx_count = 1;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
437 }