forked from osmocom/wireshark
141 lines
4.1 KiB
C
141 lines
4.1 KiB
C
|
/* Routines for sipfrag packet disassembly (RFC 3420)
|
||
|
*
|
||
|
* Martin Mathieson
|
||
|
* Based on packet-sdp.c
|
||
|
*
|
||
|
* $Id: packet-sipfrag.c,v 1.1 2004/02/03 18:57:26 guy Exp $
|
||
|
*
|
||
|
* Ethereal - Network traffic analyzer
|
||
|
* By Gerald Combs <gerald@ethereal.com>
|
||
|
* 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.
|
||
|
*/
|
||
|
|
||
|
#ifdef HAVE_CONFIG_H
|
||
|
# include "config.h"
|
||
|
#endif
|
||
|
|
||
|
#include <epan/packet.h>
|
||
|
|
||
|
/*
|
||
|
* TODO:
|
||
|
* Doesn't currently dissect the lines of the message.
|
||
|
* Need to refactor SIP dissector and make its functionality available here
|
||
|
*/
|
||
|
|
||
|
|
||
|
/* Initialize the protocol and registered fields. */
|
||
|
static int proto_sipfrag = -1;
|
||
|
static int hf_line = -1;
|
||
|
|
||
|
/* Protocol subtree. */
|
||
|
static int ett_sipfrag = -1;
|
||
|
|
||
|
|
||
|
/* Main dissection function. */
|
||
|
static void
|
||
|
dissect_sipfrag(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
||
|
{
|
||
|
proto_tree *sipfrag_tree;
|
||
|
proto_item *ti;
|
||
|
gint offset = 0;
|
||
|
gint next_offset;
|
||
|
int linelen;
|
||
|
char *string;
|
||
|
gint lines = 0;
|
||
|
|
||
|
/* Append this protocol name rather than replace. */
|
||
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
||
|
col_append_str(pinfo->cinfo, COL_PROTOCOL, "/sipfrag");
|
||
|
|
||
|
/* Add mention of this protocol to info column */
|
||
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
||
|
col_append_str(pinfo->cinfo, COL_INFO, ", with Sipfrag");
|
||
|
}
|
||
|
|
||
|
/* Create sipfrag tree. */
|
||
|
ti = proto_tree_add_item(tree, proto_sipfrag, tvb, offset, -1, FALSE);
|
||
|
sipfrag_tree = proto_item_add_subtree(ti, ett_sipfrag);
|
||
|
|
||
|
/* Show the sipfrag message a line at a time. */
|
||
|
while (tvb_reported_length_remaining(tvb, offset) > 0)
|
||
|
{
|
||
|
/* Find the end of the line. */
|
||
|
linelen = tvb_find_line_end_unquoted(tvb, offset, -1, &next_offset);
|
||
|
|
||
|
/* For now, add all lines as unparsed strings */
|
||
|
|
||
|
/* Extract & add the string. */
|
||
|
string = tvb_get_string(tvb, offset, linelen);
|
||
|
proto_tree_add_string_format(sipfrag_tree, hf_line,
|
||
|
tvb, offset,
|
||
|
linelen, string,
|
||
|
"%s", string);
|
||
|
lines++;
|
||
|
|
||
|
/* Show first line in info column */
|
||
|
if (lines == 1 && check_col(pinfo->cinfo, COL_INFO)) {
|
||
|
col_append_fstr(pinfo->cinfo, COL_INFO, "(%s", string);
|
||
|
}
|
||
|
|
||
|
/* Finished with this string now. */
|
||
|
g_free(string);
|
||
|
|
||
|
/* Move onto next line. */
|
||
|
offset = next_offset;
|
||
|
}
|
||
|
|
||
|
/* Close off summary of sipfrag in info column */
|
||
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
||
|
col_append_str(pinfo->cinfo, COL_INFO, (lines > 1) ? "...)" : ")");
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void
|
||
|
proto_register_sipfrag(void)
|
||
|
{
|
||
|
static hf_register_info hf[] =
|
||
|
{
|
||
|
{ &hf_line,
|
||
|
{ "Line",
|
||
|
"sipfrag.line",FT_STRING, BASE_NONE, NULL, 0x0, "Line", HFILL
|
||
|
}
|
||
|
},
|
||
|
};
|
||
|
|
||
|
static gint *ett[] =
|
||
|
{
|
||
|
&ett_sipfrag
|
||
|
};
|
||
|
|
||
|
/* Register protocol. */
|
||
|
proto_sipfrag = proto_register_protocol("Sipfrag", "SIPFRAG", "sipfrag");
|
||
|
proto_register_field_array(proto_sipfrag, hf, array_length(hf));
|
||
|
proto_register_subtree_array(ett, array_length(ett));
|
||
|
|
||
|
/* Allow other dissectors to find this one by name. */
|
||
|
register_dissector("sipfrag", dissect_sipfrag, proto_sipfrag);
|
||
|
}
|
||
|
|
||
|
void
|
||
|
proto_reg_handoff_sipfrag(void)
|
||
|
{
|
||
|
dissector_handle_t sipfrag_handle = find_dissector("sipfrag");
|
||
|
dissector_add_string("media_type", "message/sipfrag", sipfrag_handle);
|
||
|
}
|
||
|
|
||
|
|