279 lines
9.7 KiB
C
279 lines
9.7 KiB
C
|
/* packet-tivoconnect.c
|
||
|
|
* Routines for TiVoConnect Discovery Protocol dissection
|
||
|
|
* Copyright 2006, Kees Cook <kees@outflux.net>
|
||
|
|
* IANA UDP/TCP port: 2190 (tivoconnect)
|
||
|
|
* Protocol Spec: http://tivo.com/developer/i/TiVoConnectDiscovery.pdf
|
||
|
|
*
|
||
|
|
* IANA's full name is "TiVoConnect Beacon", where as TiVo's own
|
||
|
|
* documentation calls this protocol "TiVoConnect Discovery Protocol".
|
||
|
|
*
|
||
|
|
* $Id$
|
||
|
|
*
|
||
|
|
* Ethereal - Network traffic analyzer
|
||
|
|
* By Gerald Combs <gerald@ethereal.com>
|
||
|
|
* Copyright 1998 Gerald Combs
|
||
|
|
*
|
||
|
|
* Copied from README.developer
|
||
|
|
*
|
||
|
|
* 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* TODO
|
||
|
|
* - split services into a subtree
|
||
|
|
* - split platform into a subtree
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifdef HAVE_CONFIG_H
|
||
|
|
# include "config.h"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
#include <glib.h>
|
||
|
|
|
||
|
|
#include <epan/packet.h>
|
||
|
|
#include <epan/prefs.h>
|
||
|
|
#include <epan/ipproto.h>
|
||
|
|
|
||
|
|
/* Forward declaration we need below */
|
||
|
|
void proto_reg_handoff_tivoconnect(void);
|
||
|
|
|
||
|
|
/* Initialize the protocol and registered fields */
|
||
|
|
static int proto_tivoconnect = -1;
|
||
|
|
static int hf_tivoconnect_flavor = -1;
|
||
|
|
static int hf_tivoconnect_method = -1;
|
||
|
|
static int hf_tivoconnect_platform = -1;
|
||
|
|
static int hf_tivoconnect_machine = -1;
|
||
|
|
static int hf_tivoconnect_identity = -1;
|
||
|
|
static int hf_tivoconnect_services = -1;
|
||
|
|
static int hf_tivoconnect_version = -1;
|
||
|
|
|
||
|
|
/* Initialize the subtree pointers */
|
||
|
|
static gint ett_tivoconnect = -1;
|
||
|
|
|
||
|
|
/* Code to actually dissect the packets */
|
||
|
|
static gboolean
|
||
|
|
dissect_tivoconnect(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
||
|
|
{
|
||
|
|
/* parsing variables */
|
||
|
|
gchar * string = NULL;
|
||
|
|
gint length = -1;
|
||
|
|
/* value strings */
|
||
|
|
gchar * proto_name = NULL;
|
||
|
|
gchar * packet_identity = NULL;
|
||
|
|
gchar * packet_machine = NULL;
|
||
|
|
|
||
|
|
/* validate that we have a tivoconnect packet */
|
||
|
|
length = tvb->length;
|
||
|
|
if ( length < 11 ||
|
||
|
|
!(string = (gchar*)tvb_get_ephemeral_string(tvb, 0, length)) ||
|
||
|
|
strncasecmp(string,"tivoconnect",11) != 0) {
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Make entries in Protocol column and Info column on summary display */
|
||
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
||
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "TiVoConnect");
|
||
|
|
|
||
|
|
/* make a distinction between UDP and TCP packets */
|
||
|
|
proto_name = pinfo->ipproto == IP_PROTO_TCP ?
|
||
|
|
"Discovery Connection" :
|
||
|
|
"Discovery Beacon";
|
||
|
|
|
||
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
||
|
|
col_set_str(pinfo->cinfo, COL_INFO, proto_name);
|
||
|
|
|
||
|
|
if (tree) {
|
||
|
|
/* Set up structures needed to add the protocol subtree and manage it */
|
||
|
|
proto_item *ti = NULL;
|
||
|
|
proto_tree *tivoconnect_tree = NULL;
|
||
|
|
|
||
|
|
/* parsing variables */
|
||
|
|
guint offset = 0;
|
||
|
|
gchar * field = NULL;
|
||
|
|
|
||
|
|
/* create display subtree for the protocol */
|
||
|
|
ti = proto_tree_add_item(tree, proto_tivoconnect, tvb, 0, -1, FALSE);
|
||
|
|
|
||
|
|
tivoconnect_tree = proto_item_add_subtree(ti, ett_tivoconnect);
|
||
|
|
|
||
|
|
/* process the packet */
|
||
|
|
for ( field = strtok(string,"\n");
|
||
|
|
field;
|
||
|
|
offset+=length, field = strtok(NULL,"\n") ) {
|
||
|
|
gchar * value = NULL;
|
||
|
|
gint fieldlen;
|
||
|
|
|
||
|
|
length = strlen(field) + 1;
|
||
|
|
|
||
|
|
if ( !(value=strchr(field, '=')) ) {
|
||
|
|
/* bad packet: missing the field separator */
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
*value++='\0';
|
||
|
|
fieldlen=strlen(field)+1;
|
||
|
|
|
||
|
|
if ( strcasecmp(field,"tivoconnect") == 0 ) {
|
||
|
|
proto_tree_add_item(tivoconnect_tree,
|
||
|
|
hf_tivoconnect_flavor, tvb, offset+fieldlen,
|
||
|
|
length-fieldlen-1, FALSE);
|
||
|
|
}
|
||
|
|
else if ( strcasecmp(field,"method") == 0 ) {
|
||
|
|
proto_tree_add_item(tivoconnect_tree,
|
||
|
|
hf_tivoconnect_method, tvb, offset+fieldlen,
|
||
|
|
length-fieldlen-1, FALSE);
|
||
|
|
}
|
||
|
|
else if ( strcasecmp(field,"platform") == 0 ) {
|
||
|
|
proto_tree_add_item(tivoconnect_tree,
|
||
|
|
hf_tivoconnect_platform, tvb, offset+fieldlen,
|
||
|
|
length-fieldlen-1, FALSE);
|
||
|
|
}
|
||
|
|
else if ( strcasecmp(field,"machine") == 0 ) {
|
||
|
|
proto_tree_add_item(tivoconnect_tree,
|
||
|
|
hf_tivoconnect_machine, tvb, offset+fieldlen,
|
||
|
|
length-fieldlen-1, FALSE);
|
||
|
|
packet_machine = value;
|
||
|
|
}
|
||
|
|
else if ( strcasecmp(field,"identity") == 0 ) {
|
||
|
|
proto_tree_add_item(tivoconnect_tree,
|
||
|
|
hf_tivoconnect_identity, tvb, offset+fieldlen,
|
||
|
|
length-fieldlen-1, FALSE);
|
||
|
|
packet_identity = value;
|
||
|
|
}
|
||
|
|
else if ( strcasecmp(field,"services") == 0 ) {
|
||
|
|
proto_tree_add_item(tivoconnect_tree,
|
||
|
|
hf_tivoconnect_services, tvb, offset+fieldlen,
|
||
|
|
length-fieldlen-1, FALSE);
|
||
|
|
}
|
||
|
|
else if ( strcasecmp(field,"swversion") == 0 ) {
|
||
|
|
proto_tree_add_item(tivoconnect_tree,
|
||
|
|
hf_tivoconnect_version, tvb, offset+fieldlen,
|
||
|
|
length-fieldlen-1, FALSE);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
/* unknown field! */
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Adjust "Info" column and top of tree into more useful info */
|
||
|
|
if (packet_machine) {
|
||
|
|
proto_item_append_text(ti, ", %s", packet_machine);
|
||
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
||
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "%s %s",
|
||
|
|
proto_name, packet_machine);
|
||
|
|
}
|
||
|
|
if (packet_identity) {
|
||
|
|
proto_item_append_text(ti,
|
||
|
|
packet_machine ? " (%s)" : ", ID:%s",
|
||
|
|
packet_identity);
|
||
|
|
if (packet_machine) {
|
||
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
||
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "%s %s (%s)",
|
||
|
|
proto_name, packet_machine, packet_identity);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
||
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "%s ID:%s",
|
||
|
|
proto_name, packet_identity);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
/* If this protocol has a sub-dissector call it here, see section 1.8 */
|
||
|
|
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/* Register the protocol with Ethereal */
|
||
|
|
|
||
|
|
/* this format is require because a script is used to build the C function
|
||
|
|
that calls all the protocol registration.
|
||
|
|
*/
|
||
|
|
|
||
|
|
void
|
||
|
|
proto_register_tivoconnect(void)
|
||
|
|
{
|
||
|
|
/* Setup list of header fields See Section 1.6.1 for details*/
|
||
|
|
static hf_register_info hf[] = {
|
||
|
|
{ &hf_tivoconnect_flavor,
|
||
|
|
{ "Flavor", "tivoconnect.flavor",
|
||
|
|
FT_STRINGZ, BASE_NONE, NULL, 0,
|
||
|
|
"Protocol Flavor supported by the originator", HFILL }},
|
||
|
|
{ &hf_tivoconnect_method,
|
||
|
|
{ "Method", "tivoconnect.method",
|
||
|
|
FT_STRINGZ, BASE_NONE, NULL, 0,
|
||
|
|
"Packet was delivered via UDP(broadcast) or TCP(connected)", HFILL }},
|
||
|
|
{ &hf_tivoconnect_platform,
|
||
|
|
{ "Platform", "tivoconnect.platform",
|
||
|
|
FT_STRINGZ, BASE_NONE, NULL, 0,
|
||
|
|
"System platform, either tcd(TiVo) or pc(Computer)", HFILL }},
|
||
|
|
{ &hf_tivoconnect_machine,
|
||
|
|
{ "Machine", "tivoconnect.machine",
|
||
|
|
FT_STRINGZ, BASE_NONE, NULL, 0,
|
||
|
|
"Human-readable system name", HFILL }},
|
||
|
|
{ &hf_tivoconnect_identity,
|
||
|
|
{ "Identity", "tivoconnect.identity",
|
||
|
|
FT_STRINGZ, BASE_NONE, NULL, 0,
|
||
|
|
"Unique serial number for the system", HFILL }},
|
||
|
|
{ &hf_tivoconnect_services,
|
||
|
|
{ "Services", "tivoconnect.services",
|
||
|
|
FT_STRINGZ, BASE_NONE, NULL, 0,
|
||
|
|
"List of available services on the system", HFILL }},
|
||
|
|
{ &hf_tivoconnect_version,
|
||
|
|
{ "Version", "tivoconnect.version",
|
||
|
|
FT_STRINGZ, BASE_NONE, NULL, 0,
|
||
|
|
"System software version", HFILL }},
|
||
|
|
};
|
||
|
|
|
||
|
|
/* Setup protocol subtree array */
|
||
|
|
static gint *ett[] = {
|
||
|
|
&ett_tivoconnect,
|
||
|
|
};
|
||
|
|
|
||
|
|
/* Register the protocol name and description */
|
||
|
|
proto_tivoconnect = proto_register_protocol("TiVoConnect Discovery Protocol",
|
||
|
|
"TiVoConnect", "tivoconnect");
|
||
|
|
|
||
|
|
/* Required function calls to register the header fields and subtrees used */
|
||
|
|
proto_register_field_array(proto_tivoconnect, hf, array_length(hf));
|
||
|
|
proto_register_subtree_array(ett, array_length(ett));
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void
|
||
|
|
proto_reg_handoff_tivoconnect(void)
|
||
|
|
{
|
||
|
|
static gboolean inited = FALSE;
|
||
|
|
|
||
|
|
if( !inited ) {
|
||
|
|
|
||
|
|
dissector_handle_t tivoconnect_handle;
|
||
|
|
|
||
|
|
tivoconnect_handle = create_dissector_handle(dissect_tivoconnect,
|
||
|
|
proto_tivoconnect);
|
||
|
|
dissector_add("udp.port", 2190, tivoconnect_handle);
|
||
|
|
dissector_add("tcp.port", 2190, tivoconnect_handle);
|
||
|
|
|
||
|
|
inited = TRUE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|