1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
/*
* $Id: tags.h,v 1.1.1.1 2005/06/13 16:47:28 bogdan_iancu Exp $
*
* Copyright (C) 2001-2003 FhG Fokus
*
* This file is part of openser, a free SIP server.
*
* openser is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version
*
* openser is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
* - utility for generating to-tags
* in SER, to-tags consist of two parts: a fixed part
* which is bound to server instance and variable part
* which is bound to request -- that helps to recognize,
* who generated the to-tag in loops through the same
* server -- in such cases, fixed part is constant, but
* the variable part varies because it depends on
* via
*
* History:
* --------
* 2003-02-18 changed TOTAG_LEN into TOTAG_VALUE_LEN, to solve
* redefinition conflict with tm/t_msgbuilder.h (andrei)
*/
#ifndef _TAGS_H
#define _TAGS_H
#include "parser/msg_parser.h"
#include "globals.h"
#include "crc.h"
#include "str.h"
#include "socket_info.h"
#define TOTAG_VALUE_LEN (MD5_LEN+CRC16_LEN+1)
/* generate variable part of to-tag for a request;
* it will have length of CRC16_LEN, sufficiently
* long buffer must be passed to the function */
static inline void calc_crc_suffix( struct sip_msg *msg, char *tag_suffix)
{
int ss_nr;
str suffix_source[3];
ss_nr=2;
if (msg->via1==0) return; /* no via, bad message */
suffix_source[0]=msg->via1->host;
suffix_source[1]=msg->via1->port_str;
if (msg->via1->branch)
suffix_source[ss_nr++]=msg->via1->branch->value;
crcitt_string_array( tag_suffix, suffix_source, ss_nr );
}
static void inline init_tags( char *tag, char **suffix,
char *signature, char separator )
{
str src[3];
struct socket_info* si;
si=get_first_socket();
src[0].s=signature; src[0].len=strlen(signature);
/* if we are not listening on anything we shouldn't be here */
src[1].s=si?si->address_str.s:"";
src[1].len=si?si->address_str.len:0;
src[2].s=si?si->port_no_str.s:"";
src[2].len=si?si->port_no_str.len:0;
MDStringArray( tag, src, 3 );
tag[MD5_LEN]=separator;
*suffix=tag+MD5_LEN+1;
}
#endif
|
