137 lines
4.4 KiB
C
137 lines
4.4 KiB
C
/* packet-paltalk.c
|
|
* Routines for Paltalk dissection
|
|
* Copyright 2005, Tim Hentenaar < tim at hentenaar dot com >
|
|
* Copyright 2008, Mohammad Ebrahim Mohammadi Panah < mebrahim at gmail dot com >
|
|
*
|
|
* Wireshark - Network traffic analyzer
|
|
* By Gerald Combs <gerald@wireshark.org>
|
|
* Copyright 1998 Gerald Combs
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
|
|
#include <epan/packet.h>
|
|
|
|
#include "packet-tcp.h"
|
|
|
|
void proto_register_paltalk(void);
|
|
void proto_reg_handoff_paltalk(void);
|
|
|
|
#define INET_IPV4_ADDRESS_FROM_BYTES(a,b,c,d) g_htonl((((guint32)a)<<24) | ((b)<<16) | ((c)<<8) | (d)) /* *network* order */
|
|
|
|
#define PALTALK_SERVERS_ADDRESS INET_IPV4_ADDRESS_FROM_BYTES(199,106,0,0) /* 199.106.0.0 in *network* order */
|
|
#define PALTALK_SERVERS_NETMASK INET_IPV4_ADDRESS_FROM_BYTES(0xFF, 0xFE, 0x00, 0x00) /* /15 in *network* order */
|
|
|
|
#define PALTALK_HEADER_LENGTH 6
|
|
|
|
static int proto_paltalk = -1;
|
|
|
|
static int hf_paltalk_pdu_type = -1;
|
|
static int hf_paltalk_version = -1;
|
|
static int hf_paltalk_length = -1;
|
|
static int hf_paltalk_content = -1;
|
|
|
|
static gint ett_paltalk = -1;
|
|
|
|
static guint
|
|
dissect_paltalk_get_len(packet_info *pinfo _U_, tvbuff_t *tvb,
|
|
int offset, void *data _U_)
|
|
{
|
|
return tvb_get_ntohs(tvb, offset + 4) + PALTALK_HEADER_LENGTH;
|
|
}
|
|
|
|
static int
|
|
dissect_paltalk_desegmented(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
proto_item *ti = NULL;
|
|
proto_tree *pt_tree = NULL;
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "Paltalk");
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
if (tree) /* we are being asked for details */
|
|
{
|
|
ti = proto_tree_add_item(tree, proto_paltalk, tvb, 0, -1, ENC_NA);
|
|
pt_tree = proto_item_add_subtree(ti, ett_paltalk);
|
|
proto_tree_add_item(pt_tree, hf_paltalk_pdu_type, tvb, 0, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(pt_tree, hf_paltalk_version, tvb, 2, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(pt_tree, hf_paltalk_length, tvb, 4, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(pt_tree, hf_paltalk_content, tvb, 6, tvb_get_ntohs(tvb, 4), ENC_NA);
|
|
}
|
|
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
static gboolean
|
|
dissect_paltalk(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
|
|
{
|
|
guint32 src32, dst32;
|
|
|
|
/* Detect if this TCP session is a Paltalk one */
|
|
/* TODO: Optimize detection logic if possible */
|
|
|
|
if ((pinfo->net_src.type != AT_IPv4)
|
|
|| (pinfo->net_dst.type != AT_IPv4)
|
|
|| (pinfo->net_src.len != 4)
|
|
|| (pinfo->net_dst.len != 4)
|
|
|| !pinfo->net_src.data
|
|
|| !pinfo->net_dst.data)
|
|
return FALSE;
|
|
|
|
memcpy((guint8 *)&src32, pinfo->net_src.data, 4); /* *Network* order */
|
|
memcpy((guint8 *)&dst32, pinfo->net_dst.data, 4); /* *Network* order */
|
|
|
|
if ( ((src32 & PALTALK_SERVERS_NETMASK) != PALTALK_SERVERS_ADDRESS)
|
|
&&
|
|
((dst32 & PALTALK_SERVERS_NETMASK) != PALTALK_SERVERS_ADDRESS))
|
|
return FALSE;
|
|
|
|
/* Dissect result of desegmented TCP data */
|
|
tcp_dissect_pdus(tvb, pinfo, tree, TRUE, PALTALK_HEADER_LENGTH,
|
|
dissect_paltalk_get_len, dissect_paltalk_desegmented, data);
|
|
return TRUE;
|
|
}
|
|
|
|
void
|
|
proto_register_paltalk(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_paltalk_pdu_type, { "Packet Type", "paltalk.type",
|
|
FT_UINT16, BASE_HEX, NULL, 0x00, NULL, HFILL }},
|
|
{ &hf_paltalk_version, { "Protocol Version", "paltalk.version",
|
|
FT_INT16, BASE_DEC, NULL, 0x00, NULL, HFILL }},
|
|
{ &hf_paltalk_length, { "Payload Length", "paltalk.length",
|
|
FT_INT16, BASE_DEC, NULL, 0x00, NULL, HFILL }},
|
|
{ &hf_paltalk_content, { "Payload Content", "paltalk.content",
|
|
FT_BYTES, BASE_NONE, NULL, 0x00, NULL, HFILL }}
|
|
};
|
|
|
|
static gint *ett[] = { &ett_paltalk };
|
|
|
|
proto_paltalk = proto_register_protocol("Paltalk Messenger Protocol", "Paltalk", "paltalk");
|
|
proto_register_field_array(proto_paltalk, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_paltalk(void)
|
|
{
|
|
heur_dissector_add("tcp", dissect_paltalk, "Paltalk over TCP", "paltalk_tcp", proto_paltalk, HEURISTIC_ENABLE);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - https://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|