forked from osmocom/wireshark
![Guy Harris](/assets/img/avatar_default.png)
Add "tvb_find_line_end_unquoted()" for the benefit of the SDP dissector; get rid of "find_line_end_unquoted()" as nobody uses it any more. Add "tvb_pbrk_guint8()" for the benefit of "tvb_find_line_end_unquoted()"; it searches for any of a number of characters, unlike "tvb_find_guint8()" which searches for only one. svn path=/trunk/; revision=2595
208 lines
4.7 KiB
C
208 lines
4.7 KiB
C
/* packet-sdp.c
|
|
* Routines for SDP packet disassembly (RFC 2327)
|
|
*
|
|
* Jason Lango <jal@netapp.com>
|
|
* Liberally copied from packet-http.c, by Guy Harris <guy@alum.mit.edu>
|
|
*
|
|
* $Id: packet-sdp.c,v 1.12 2000/11/10 06:50:36 guy Exp $
|
|
*
|
|
* Ethereal - Network traffic analyzer
|
|
* By Gerald Combs <gerald@zing.org>
|
|
* Copyright 1998 Gerald Combs
|
|
*
|
|
*
|
|
* This program 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.
|
|
*
|
|
* This program 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.
|
|
*
|
|
*
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#ifdef HAVE_SYS_TYPES_H
|
|
#include <sys/types.h>
|
|
#endif
|
|
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
|
|
#include <glib.h>
|
|
#include "packet.h"
|
|
#include "strutil.h"
|
|
|
|
static int proto_sdp = -1;
|
|
|
|
static int ett_sdp = -1;
|
|
|
|
void
|
|
dissect_sdp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
proto_tree *sdp_tree;
|
|
proto_item *ti;
|
|
gint offset = 0;
|
|
const u_char *line;
|
|
gint next_offset;
|
|
int linelen;
|
|
u_char section;
|
|
u_char type;
|
|
const u_char *value;
|
|
int valuelen;
|
|
const char *typename;
|
|
int datalen;
|
|
|
|
CHECK_DISPLAY_AS_DATA(proto_sdp, tvb, pinfo, tree);
|
|
|
|
pinfo->current_proto = "SDP";
|
|
|
|
if (check_col(pinfo->fd, COL_PROTOCOL))
|
|
col_add_str(pinfo->fd, COL_PROTOCOL, "SDP");
|
|
|
|
if (check_col(pinfo->fd, COL_INFO)) {
|
|
/* XXX: Needs description. */
|
|
col_add_str(pinfo->fd, COL_INFO, "Session Description");
|
|
}
|
|
|
|
if (!tree)
|
|
return;
|
|
|
|
ti = proto_tree_add_item(tree, proto_sdp, tvb, offset,
|
|
tvb_length_remaining(tvb, offset), FALSE);
|
|
sdp_tree = proto_item_add_subtree(ti, ett_sdp);
|
|
|
|
/*
|
|
* Show the SDP message a line at a time.
|
|
*/
|
|
section = 0;
|
|
while (tvb_length_remaining(tvb, offset)) {
|
|
/*
|
|
* Find the end of the line.
|
|
*/
|
|
linelen = tvb_find_line_end_unquoted(tvb, offset, -1,
|
|
&next_offset);
|
|
|
|
/*
|
|
* Line must contain at least e.g. "v=".
|
|
*/
|
|
if (linelen < 2)
|
|
break;
|
|
|
|
line = tvb_get_ptr(tvb, offset, next_offset - offset);
|
|
type = line[0];
|
|
if (line[1] != '=') {
|
|
proto_tree_add_text(sdp_tree, tvb, offset,
|
|
next_offset - offset,
|
|
"Invalid line: %s",
|
|
tvb_format_text(tvb, offset, next_offset - offset));
|
|
continue;
|
|
}
|
|
value = line + 2;
|
|
valuelen = linelen - 2;
|
|
|
|
/*
|
|
* Attributes.
|
|
*/
|
|
switch (type) {
|
|
case 'v':
|
|
section = 'v';
|
|
typename = "Session Description, version";
|
|
break;
|
|
case 'o':
|
|
typename = "Owner/Creator, Session Id";
|
|
break;
|
|
case 's':
|
|
typename = "Session Name";
|
|
break;
|
|
case 'i':
|
|
if (section == 'v')
|
|
typename = "Session Information";
|
|
else if (section == 'm')
|
|
typename = "Media Title";
|
|
else
|
|
typename = "Misplaced";
|
|
break;
|
|
case 'u':
|
|
typename = "URI of Description";
|
|
break;
|
|
case 'e':
|
|
typename = "E-mail Address";
|
|
break;
|
|
case 'p':
|
|
typename = "Phone Number";
|
|
break;
|
|
case 'c':
|
|
typename = "Connection Information";
|
|
break;
|
|
case 'b':
|
|
typename = "Bandwidth Information";
|
|
break;
|
|
case 't':
|
|
section = 't';
|
|
typename = "Time Description, active time";
|
|
break;
|
|
case 'r':
|
|
typename = "Repeat Time";
|
|
break;
|
|
case 'm':
|
|
section = 'm';
|
|
typename = "Media Description, name and address";
|
|
break;
|
|
case 'k':
|
|
typename = "Encryption Key";
|
|
break;
|
|
case 'a':
|
|
if (section == 'v')
|
|
typename = "Session Attribute";
|
|
else if (section == 'm')
|
|
typename = "Media Attribute";
|
|
else
|
|
typename = "Misplaced";
|
|
break;
|
|
case 'z':
|
|
typename = "Time Zone Adjustment";
|
|
break;
|
|
default:
|
|
typename = "Unknown";
|
|
break;
|
|
}
|
|
|
|
proto_tree_add_text(sdp_tree, tvb, offset,
|
|
next_offset - offset,
|
|
"%s (%c): %s", typename, type,
|
|
format_text(value, valuelen));
|
|
offset = next_offset;
|
|
}
|
|
|
|
datalen = tvb_length_remaining(tvb, offset);
|
|
if (datalen > 0) {
|
|
proto_tree_add_text(sdp_tree, tvb, offset, datalen,
|
|
"Data (%d bytes)", datalen);
|
|
}
|
|
}
|
|
|
|
void
|
|
proto_register_sdp(void)
|
|
{
|
|
/* static hf_register_info hf[] = {
|
|
{ &variable,
|
|
{ "Name", "sdp.abbreviation", TYPE, VALS_POINTER }},
|
|
};*/
|
|
static gint *ett[] = {
|
|
&ett_sdp,
|
|
};
|
|
|
|
proto_sdp = proto_register_protocol("Session Description Protocol", "sdp");
|
|
/* proto_register_field_array(proto_sdp, hf, array_length(hf));*/
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|