![Bill Meier](/assets/img/avatar_default.png)
Change-Id: I857700d685354b0bc9e0ca647c57faba981b520f Reviewed-on: https://code.wireshark.org/review/4373 Reviewed-by: Bill Meier <wmeier@newsguy.com>
732 lines
31 KiB
C
732 lines
31 KiB
C
/* packet-classicstun.c
|
|
* Routines for Simple Traversal of UDP Through NAT dissection
|
|
* Copyright 2003, Shiang-Ming Huang <smhuang@pcs.csie.nctu.edu.tw>
|
|
*
|
|
* Wireshark - Network traffic analyzer
|
|
* By Gerald Combs <gerald@wireshark.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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Please refer to RFC 3489 for protocol detail.
|
|
* (supports extra message attributes described in draft-ietf-behave-rfc3489bis-00)
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <glib.h>
|
|
|
|
#include <epan/packet.h>
|
|
#include <epan/conversation.h>
|
|
#include <epan/wmem/wmem.h>
|
|
|
|
void proto_register_classicstun(void);
|
|
void proto_reg_handoff_classicstun(void);
|
|
|
|
/* Initialize the protocol and registered fields */
|
|
static int proto_classicstun = -1;
|
|
|
|
static int hf_classicstun_type = -1; /* CLASSIC-STUN message header */
|
|
static int hf_classicstun_length = -1;
|
|
static int hf_classicstun_id = -1;
|
|
static int hf_classicstun_att = -1;
|
|
static int hf_classicstun_response_in = -1;
|
|
static int hf_classicstun_response_to = -1;
|
|
static int hf_classicstun_time = -1;
|
|
|
|
|
|
static int classicstun_att_type = -1; /* CLASSIC-STUN attribute fields */
|
|
static int classicstun_att_length = -1;
|
|
static int classicstun_att_value = -1;
|
|
static int classicstun_att_family = -1;
|
|
static int classicstun_att_ipv4 = -1;
|
|
static int classicstun_att_ipv6 = -1;
|
|
static int classicstun_att_port = -1;
|
|
static int classicstun_att_change_ip = -1;
|
|
static int classicstun_att_change_port = -1;
|
|
static int classicstun_att_unknown = -1;
|
|
static int classicstun_att_error_class = -1;
|
|
static int classicstun_att_error_number = -1;
|
|
static int classicstun_att_error_reason = -1;
|
|
static int classicstun_att_server_string = -1;
|
|
static int classicstun_att_xor_ipv4 = -1;
|
|
static int classicstun_att_xor_ipv6 = -1;
|
|
static int classicstun_att_xor_port = -1;
|
|
static int classicstun_att_lifetime = -1;
|
|
static int classicstun_att_magic_cookie = -1;
|
|
static int classicstun_att_bandwidth = -1;
|
|
static int classicstun_att_data = -1;
|
|
static int classicstun_att_connection_request_binding = -1;
|
|
|
|
/* Structure containing transaction specific information */
|
|
typedef struct _classicstun_transaction_t {
|
|
guint32 req_frame;
|
|
guint32 rep_frame;
|
|
nstime_t req_time;
|
|
} classicstun_transaction_t;
|
|
|
|
/* Structure containing conversation specific information */
|
|
typedef struct _classicstun_conv_info_t {
|
|
wmem_tree_t *pdus;
|
|
} classicstun_conv_info_t;
|
|
|
|
|
|
/* Message Types */
|
|
#define BINDING_REQUEST 0x0001
|
|
#define BINDING_RESPONSE 0x0101
|
|
#define BINDING_ERROR_RESPONSE 0x0111
|
|
#define SHARED_SECRET_REQUEST 0x0002
|
|
#define SHARED_SECRET_RESPONSE 0x0102
|
|
#define SHARED_SECRET_ERROR_RESPONSE 0x1112
|
|
#define ALLOCATE_REQUEST 0x0003
|
|
#define ALLOCATE_RESPONSE 0x0103
|
|
#define ALLOCATE_ERROR_RESPONSE 0x0113
|
|
#define SEND_REQUEST 0x0004
|
|
#define SEND_RESPONSE 0x0104
|
|
#define SEND_ERROR_RESPONSE 0x0114
|
|
#define DATA_INDICATION 0x0115
|
|
#define SET_ACTIVE_DESTINATION_REQUEST 0x0006
|
|
#define SET_ACTIVE_DESTINATION_RESPONSE 0x0106
|
|
#define SET_ACTIVE_DESTINATION_ERROR_RESPONSE 0x0116
|
|
|
|
|
|
/* Message classes */
|
|
#define CLASS_MASK 0xC110
|
|
#define REQUEST 0x0000
|
|
#define INDICATION 0x0001
|
|
#define RESPONSE 0x0010
|
|
#define ERROR_RESPONSE 0x0011
|
|
|
|
/* Attribute Types */
|
|
#define MAPPED_ADDRESS 0x0001
|
|
#define RESPONSE_ADDRESS 0x0002
|
|
#define CHANGE_REQUEST 0x0003
|
|
#define SOURCE_ADDRESS 0x0004
|
|
#define CHANGED_ADDRESS 0x0005
|
|
#define USERNAME 0x0006
|
|
#define PASSWORD 0x0007
|
|
#define MESSAGE_INTEGRITY 0x0008
|
|
#define ERROR_CODE 0x0009
|
|
#define UNKNOWN_ATTRIBUTES 0x000a
|
|
#define REFLECTED_FROM 0x000b
|
|
#define LIFETIME 0x000d
|
|
#define ALTERNATE_SERVER 0x000e
|
|
#define MAGIC_COOKIE 0x000f
|
|
#define BANDWIDTH 0x0010
|
|
#define DESTINATION_ADDRESS 0x0011
|
|
#define REMOTE_ADDRESS 0x0012
|
|
#define DATA 0x0013
|
|
#define NONCE 0x0014
|
|
#define REALM 0x0015
|
|
#define REQUESTED_ADDRESS_TYPE 0x0016
|
|
#define XOR_MAPPED_ADDRESS 0x8020
|
|
#define XOR_ONLY 0x0021
|
|
#define SERVER 0x8022
|
|
#define CONNECTION_REQUEST_BINDING 0xc001
|
|
#define BINDING_CHANGE 0xc002
|
|
|
|
|
|
|
|
/* Initialize the subtree pointers */
|
|
static gint ett_classicstun = -1;
|
|
static gint ett_classicstun_att_type = -1;
|
|
static gint ett_classicstun_att = -1;
|
|
|
|
|
|
#define UDP_PORT_STUN 3478
|
|
#define TCP_PORT_STUN 3478
|
|
|
|
|
|
#define CLASSICSTUN_HDR_LEN ((guint)20) /* CLASSIC-STUN message header length */
|
|
#define ATTR_HDR_LEN 4 /* CLASSIC-STUN attribute header length */
|
|
|
|
|
|
static const value_string messages[] = {
|
|
{BINDING_REQUEST , "Binding Request"},
|
|
{BINDING_RESPONSE , "Binding Response"},
|
|
{BINDING_ERROR_RESPONSE , "Binding Error Response"},
|
|
{SHARED_SECRET_REQUEST , "Shared Secret Request"},
|
|
{SHARED_SECRET_RESPONSE , "Shared Secret Response"},
|
|
{SHARED_SECRET_ERROR_RESPONSE , "Shared Secret Error Response"},
|
|
{ALLOCATE_REQUEST , "Allocate Request"},
|
|
{ALLOCATE_RESPONSE , "Allocate Response"},
|
|
{ALLOCATE_ERROR_RESPONSE , "Allocate Error Response"},
|
|
{SEND_REQUEST , "Send Request"},
|
|
{SEND_RESPONSE , "Send Response"},
|
|
{SEND_ERROR_RESPONSE , "Send Error Response"},
|
|
{DATA_INDICATION , "Data Indication"},
|
|
{SET_ACTIVE_DESTINATION_REQUEST , "Set Active Destination Request"},
|
|
{SET_ACTIVE_DESTINATION_RESPONSE , "Set Active Destination Response"},
|
|
{SET_ACTIVE_DESTINATION_ERROR_RESPONSE , "Set Active Destination Error Response"},
|
|
{0x00 , NULL}
|
|
};
|
|
|
|
static const value_string attributes[] = {
|
|
{MAPPED_ADDRESS , "MAPPED-ADDRESS"},
|
|
{RESPONSE_ADDRESS , "RESPONSE-ADDRESS"},
|
|
{CHANGE_REQUEST , "CHANGE-REQUEST"},
|
|
{SOURCE_ADDRESS , "SOURCE-ADDRESS"},
|
|
{CHANGED_ADDRESS , "CHANGED-ADDRESS"},
|
|
{USERNAME , "USERNAME"},
|
|
{PASSWORD , "PASSWORD"},
|
|
{MESSAGE_INTEGRITY , "MESSAGE-INTEGRITY"},
|
|
{ERROR_CODE , "ERROR-CODE"},
|
|
{REFLECTED_FROM , "REFLECTED-FROM"},
|
|
{LIFETIME , "LIFETIME"},
|
|
{ALTERNATE_SERVER , "ALTERNATE_SERVER"},
|
|
{MAGIC_COOKIE , "MAGIC_COOKIE"},
|
|
{BANDWIDTH , "BANDWIDTH"},
|
|
{DESTINATION_ADDRESS , "DESTINATION_ADDRESS"},
|
|
{REMOTE_ADDRESS , "REMOTE_ADDRESS"},
|
|
{DATA , "DATA"},
|
|
{NONCE , "NONCE"},
|
|
{REALM , "REALM"},
|
|
{REQUESTED_ADDRESS_TYPE , "REQUESTED_ADDRESS_TYPE"},
|
|
{XOR_MAPPED_ADDRESS , "XOR_MAPPED_ADDRESS"},
|
|
{XOR_ONLY , "XOR_ONLY"},
|
|
{SERVER , "SERVER"},
|
|
{CONNECTION_REQUEST_BINDING , "CONNECTION-REQUEST-BINDING"},
|
|
{BINDING_CHANGE , "BINDING-CHANGE"},
|
|
{0x00 , NULL}
|
|
};
|
|
|
|
static const value_string attributes_family[] = {
|
|
{0x0001 , "IPv4"},
|
|
{0x0002 , "IPv6"},
|
|
{0x00 , NULL}
|
|
};
|
|
|
|
static int
|
|
dissect_classicstun(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
|
|
proto_item *ti;
|
|
proto_item *ta;
|
|
proto_tree *classicstun_tree;
|
|
proto_tree *att_type_tree;
|
|
proto_tree *att_tree;
|
|
guint16 msg_type;
|
|
guint16 msg_length;
|
|
const char *msg_type_str;
|
|
guint16 att_type;
|
|
guint16 att_length;
|
|
guint16 offset;
|
|
guint len;
|
|
guint i;
|
|
conversation_t *conversation;
|
|
classicstun_conv_info_t *classicstun_info;
|
|
classicstun_transaction_t *classicstun_trans;
|
|
wmem_tree_key_t transaction_id_key[2];
|
|
guint32 transaction_id[4];
|
|
|
|
|
|
/*
|
|
* First check if the frame is really meant for us.
|
|
*/
|
|
len = tvb_length(tvb);
|
|
/* First, make sure we have enough data to do the check. */
|
|
if (len < CLASSICSTUN_HDR_LEN)
|
|
return 0;
|
|
|
|
msg_type = tvb_get_ntohs(tvb, 0);
|
|
|
|
if (msg_type & 0xC000 || tvb_get_ntohl(tvb, 4) == 0x2112a442 /* New STUN */
|
|
|| tvb_get_ntohl(tvb, 4) == 0x7f5a9bc7) /* XMCP */
|
|
return 0;
|
|
|
|
/* check if message type is correct */
|
|
msg_type_str = try_val_to_str(msg_type, messages);
|
|
if (msg_type_str == NULL)
|
|
return 0;
|
|
|
|
msg_length = tvb_get_ntohs(tvb, 2);
|
|
|
|
/* check if payload enough */
|
|
if (len != CLASSICSTUN_HDR_LEN+msg_length)
|
|
return 0;
|
|
|
|
/* The message seems to be a valid CLASSIC-STUN message! */
|
|
|
|
/* Create the transaction key which may be used
|
|
to track the conversation */
|
|
transaction_id[0] = tvb_get_ntohl(tvb, 4);
|
|
transaction_id[1] = tvb_get_ntohl(tvb, 8);
|
|
transaction_id[2] = tvb_get_ntohl(tvb, 12);
|
|
transaction_id[3] = tvb_get_ntohl(tvb, 16);
|
|
|
|
transaction_id_key[0].length = 4;
|
|
transaction_id_key[0].key = transaction_id;
|
|
transaction_id_key[1].length = 0;
|
|
transaction_id_key[1].key = NULL;
|
|
|
|
/*
|
|
* Do we have a conversation for this connection?
|
|
*/
|
|
conversation = find_or_create_conversation(pinfo);
|
|
|
|
/*
|
|
* Do we already have a state structure for this conv
|
|
*/
|
|
classicstun_info = (classicstun_conv_info_t *)conversation_get_proto_data(conversation, proto_classicstun);
|
|
if (!classicstun_info) {
|
|
/* No. Attach that information to the conversation, and add
|
|
* it to the list of information structures.
|
|
*/
|
|
classicstun_info = wmem_new(wmem_file_scope(), classicstun_conv_info_t);
|
|
classicstun_info->pdus=wmem_tree_new(wmem_file_scope());
|
|
conversation_add_proto_data(conversation, proto_classicstun, classicstun_info);
|
|
}
|
|
|
|
if(!pinfo->fd->flags.visited){
|
|
if (((msg_type & CLASS_MASK) >> 4) == REQUEST) {
|
|
/* This is a request */
|
|
classicstun_trans=wmem_new(wmem_file_scope(), classicstun_transaction_t);
|
|
classicstun_trans->req_frame=pinfo->fd->num;
|
|
classicstun_trans->rep_frame=0;
|
|
classicstun_trans->req_time=pinfo->fd->abs_ts;
|
|
wmem_tree_insert32_array(classicstun_info->pdus, transaction_id_key,
|
|
(void *)classicstun_trans);
|
|
} else {
|
|
classicstun_trans=(classicstun_transaction_t *)wmem_tree_lookup32_array(classicstun_info->pdus,
|
|
transaction_id_key);
|
|
if(classicstun_trans){
|
|
classicstun_trans->rep_frame=pinfo->fd->num;
|
|
}
|
|
}
|
|
} else {
|
|
classicstun_trans=(classicstun_transaction_t *)wmem_tree_lookup32_array(classicstun_info->pdus, transaction_id_key);
|
|
}
|
|
if(!classicstun_trans){
|
|
/* create a "fake" pana_trans structure */
|
|
classicstun_trans=wmem_new(wmem_packet_scope(), classicstun_transaction_t);
|
|
classicstun_trans->req_frame=0;
|
|
classicstun_trans->rep_frame=0;
|
|
classicstun_trans->req_time=pinfo->fd->abs_ts;
|
|
}
|
|
|
|
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "CLASSIC-STUN");
|
|
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "Message: %s",
|
|
msg_type_str);
|
|
|
|
if (tree) {
|
|
guint transaction_id_first_word;
|
|
|
|
ti = proto_tree_add_item(tree, proto_classicstun, tvb, 0, -1, ENC_NA);
|
|
|
|
classicstun_tree = proto_item_add_subtree(ti, ett_classicstun);
|
|
|
|
if (((msg_type & CLASS_MASK) >> 4) == REQUEST) {
|
|
if (classicstun_trans->rep_frame) {
|
|
proto_item *it;
|
|
it=proto_tree_add_uint(classicstun_tree, hf_classicstun_response_in,
|
|
tvb, 0, 0,
|
|
classicstun_trans->rep_frame);
|
|
PROTO_ITEM_SET_GENERATED(it);
|
|
}
|
|
}
|
|
else if ((((msg_type & CLASS_MASK) >> 4) == RESPONSE) ||
|
|
(((msg_type & CLASS_MASK) >> 4) == ERROR_RESPONSE)) {
|
|
/* This is a response */
|
|
if(classicstun_trans->req_frame){
|
|
proto_item *it;
|
|
nstime_t ns;
|
|
|
|
it=proto_tree_add_uint(classicstun_tree, hf_classicstun_response_to, tvb, 0, 0, classicstun_trans->req_frame);
|
|
PROTO_ITEM_SET_GENERATED(it);
|
|
|
|
nstime_delta(&ns, &pinfo->fd->abs_ts, &classicstun_trans->req_time);
|
|
it=proto_tree_add_time(classicstun_tree, hf_classicstun_time, tvb, 0, 0, &ns);
|
|
PROTO_ITEM_SET_GENERATED(it);
|
|
}
|
|
|
|
}
|
|
|
|
proto_tree_add_uint(classicstun_tree, hf_classicstun_type, tvb, 0, 2, msg_type);
|
|
proto_tree_add_uint(classicstun_tree, hf_classicstun_length, tvb, 2, 2, msg_length);
|
|
proto_tree_add_item(classicstun_tree, hf_classicstun_id, tvb, 4, 16, ENC_NA);
|
|
|
|
/* Remember this (in host order) so we can show clear xor'd addresses */
|
|
transaction_id_first_word = tvb_get_ntohl(tvb, 4);
|
|
|
|
if (msg_length > 0) {
|
|
ta = proto_tree_add_item(classicstun_tree, hf_classicstun_att, tvb, CLASSICSTUN_HDR_LEN, msg_length, ENC_NA);
|
|
att_type_tree = proto_item_add_subtree(ta, ett_classicstun_att_type);
|
|
|
|
offset = CLASSICSTUN_HDR_LEN;
|
|
|
|
while( msg_length > 0) {
|
|
att_type = tvb_get_ntohs(tvb, offset); /* Type field in attribute header */
|
|
att_length = tvb_get_ntohs(tvb, offset+2); /* Length field in attribute header */
|
|
|
|
att_tree = proto_tree_add_subtree_format(att_type_tree, tvb, offset,
|
|
ATTR_HDR_LEN+att_length, ett_classicstun_att, NULL,
|
|
"Attribute: %s",
|
|
val_to_str(att_type, attributes, "Unknown (0x%04x)"));
|
|
|
|
proto_tree_add_uint(att_tree, classicstun_att_type, tvb,
|
|
offset, 2, att_type);
|
|
offset += 2;
|
|
if (ATTR_HDR_LEN+att_length > msg_length) {
|
|
proto_tree_add_uint_format_value(att_tree,
|
|
classicstun_att_length, tvb, offset, 2,
|
|
att_length,
|
|
"%u (bogus, goes past the end of the message)",
|
|
att_length);
|
|
break;
|
|
}
|
|
proto_tree_add_uint(att_tree, classicstun_att_length, tvb,
|
|
offset, 2, att_length);
|
|
offset += 2;
|
|
switch( att_type ){
|
|
case MAPPED_ADDRESS:
|
|
case RESPONSE_ADDRESS:
|
|
case SOURCE_ADDRESS:
|
|
case CHANGED_ADDRESS:
|
|
case REFLECTED_FROM:
|
|
case ALTERNATE_SERVER:
|
|
case DESTINATION_ADDRESS:
|
|
case REMOTE_ADDRESS:
|
|
if (att_length < 2)
|
|
break;
|
|
proto_tree_add_item(att_tree, classicstun_att_family, tvb, offset+1, 1, ENC_BIG_ENDIAN);
|
|
if (att_length < 4)
|
|
break;
|
|
proto_tree_add_item(att_tree, classicstun_att_port, tvb, offset+2, 2, ENC_BIG_ENDIAN);
|
|
switch( tvb_get_guint8(tvb, offset+1) ){
|
|
case 1:
|
|
if (att_length < 8)
|
|
break;
|
|
proto_tree_add_item(att_tree, classicstun_att_ipv4, tvb, offset+4, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case 2:
|
|
if (att_length < 20)
|
|
break;
|
|
proto_tree_add_item(att_tree, classicstun_att_ipv6, tvb, offset+4, 16, ENC_NA);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case CHANGE_REQUEST:
|
|
if (att_length < 4)
|
|
break;
|
|
proto_tree_add_item(att_tree, classicstun_att_change_ip, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(att_tree, classicstun_att_change_port, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case USERNAME:
|
|
case PASSWORD:
|
|
case MESSAGE_INTEGRITY:
|
|
case NONCE:
|
|
case REALM:
|
|
if (att_length < 1)
|
|
break;
|
|
proto_tree_add_item(att_tree, classicstun_att_value, tvb, offset, att_length, ENC_NA);
|
|
break;
|
|
|
|
case ERROR_CODE:
|
|
if (att_length < 3)
|
|
break;
|
|
proto_tree_add_item(att_tree, classicstun_att_error_class, tvb, offset+2, 1, ENC_BIG_ENDIAN);
|
|
if (att_length < 4)
|
|
break;
|
|
proto_tree_add_item(att_tree, classicstun_att_error_number, tvb, offset+3, 1, ENC_BIG_ENDIAN);
|
|
if (att_length < 5)
|
|
break;
|
|
proto_tree_add_item(att_tree, classicstun_att_error_reason, tvb, offset+4, (att_length-4), ENC_UTF_8|ENC_NA);
|
|
break;
|
|
|
|
case LIFETIME:
|
|
if (att_length < 4)
|
|
break;
|
|
proto_tree_add_item(att_tree, classicstun_att_lifetime, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case MAGIC_COOKIE:
|
|
if (att_length < 4)
|
|
break;
|
|
proto_tree_add_item(att_tree, classicstun_att_magic_cookie, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case BANDWIDTH:
|
|
if (att_length < 4)
|
|
break;
|
|
proto_tree_add_item(att_tree, classicstun_att_bandwidth, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case DATA:
|
|
proto_tree_add_item(att_tree, classicstun_att_data, tvb, offset, att_length, ENC_NA);
|
|
break;
|
|
|
|
case UNKNOWN_ATTRIBUTES:
|
|
for (i = 0; i < att_length; i += 4) {
|
|
proto_tree_add_item(att_tree, classicstun_att_unknown, tvb, offset+i, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(att_tree, classicstun_att_unknown, tvb, offset+i+2, 2, ENC_BIG_ENDIAN);
|
|
}
|
|
break;
|
|
|
|
case SERVER:
|
|
proto_tree_add_item(att_tree, classicstun_att_server_string, tvb, offset, att_length, ENC_UTF_8|ENC_NA);
|
|
break;
|
|
|
|
case XOR_MAPPED_ADDRESS:
|
|
if (att_length < 2)
|
|
break;
|
|
proto_tree_add_item(att_tree, classicstun_att_family, tvb, offset+1, 1, ENC_BIG_ENDIAN);
|
|
if (att_length < 4)
|
|
break;
|
|
proto_tree_add_item(att_tree, classicstun_att_xor_port, tvb, offset+2, 2, ENC_BIG_ENDIAN);
|
|
|
|
/* Show the port 'in the clear'
|
|
XOR (host order) transid with (host order) xor-port.
|
|
Add host-order port into tree. */
|
|
ti = proto_tree_add_uint(att_tree, classicstun_att_port, tvb, offset+2, 2,
|
|
tvb_get_ntohs(tvb, offset+2) ^
|
|
(transaction_id_first_word >> 16));
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
|
|
if (att_length < 8)
|
|
break;
|
|
switch( tvb_get_guint8(tvb, offset+1) ){
|
|
case 1:
|
|
if (att_length < 8)
|
|
break;
|
|
proto_tree_add_item(att_tree, classicstun_att_xor_ipv4, tvb, offset+4, 4, ENC_BIG_ENDIAN);
|
|
|
|
/* Show the address 'in the clear'.
|
|
XOR (host order) transid with (host order) xor-address.
|
|
Add in network order tree. */
|
|
ti = proto_tree_add_ipv4(att_tree, classicstun_att_ipv4, tvb, offset+4, 4,
|
|
tvb_get_ipv4(tvb, offset+4) ^ g_htonl(transaction_id_first_word));
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
break;
|
|
|
|
case 2:
|
|
if (att_length < 20)
|
|
break;
|
|
proto_tree_add_item(att_tree, classicstun_att_xor_ipv6, tvb, offset+4, 16, ENC_NA);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case REQUESTED_ADDRESS_TYPE:
|
|
if (att_length < 2)
|
|
break;
|
|
proto_tree_add_item(att_tree, classicstun_att_family, tvb, offset+1, 1, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case CONNECTION_REQUEST_BINDING:
|
|
proto_tree_add_item(att_tree, classicstun_att_connection_request_binding, tvb, offset, att_length, ENC_UTF_8|ENC_NA);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
offset += att_length;
|
|
msg_length -= ATTR_HDR_LEN+att_length;
|
|
}
|
|
}
|
|
}
|
|
return tvb_length(tvb);
|
|
}
|
|
|
|
|
|
static gboolean
|
|
dissect_classicstun_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
if (dissect_classicstun(tvb, pinfo, tree, NULL) == 0)
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
|
|
|
|
void
|
|
proto_register_classicstun(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_classicstun_type,
|
|
{ "Message Type", "classicstun.type", FT_UINT16,
|
|
BASE_HEX, VALS(messages), 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_classicstun_length,
|
|
{ "Message Length", "classicstun.length", FT_UINT16,
|
|
BASE_HEX, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_classicstun_id,
|
|
{ "Message Transaction ID", "classicstun.id", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_classicstun_att,
|
|
{ "Attributes", "classicstun.att", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_classicstun_response_in,
|
|
{ "Response In", "classicstun.response_in",
|
|
FT_FRAMENUM, BASE_NONE, NULL, 0x0,
|
|
"The response to this CLASSICSTUN query is in this frame", HFILL }},
|
|
{ &hf_classicstun_response_to,
|
|
{ "Request In", "classicstun.response_to",
|
|
FT_FRAMENUM, BASE_NONE, NULL, 0x0,
|
|
"This is a response to the CLASSICSTUN Request in this frame", HFILL }},
|
|
{ &hf_classicstun_time,
|
|
{ "Time", "classicstun.time",
|
|
FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0,
|
|
"The time between the Request and the Response", HFILL }},
|
|
|
|
/* ////////////////////////////////////// */
|
|
{ &classicstun_att_type,
|
|
{ "Attribute Type", "classicstun.att.type", FT_UINT16,
|
|
BASE_HEX, VALS(attributes), 0x0, NULL, HFILL }
|
|
},
|
|
{ &classicstun_att_length,
|
|
{ "Attribute Length", "classicstun.att.length", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &classicstun_att_value,
|
|
{ "Value", "classicstun.att.value", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &classicstun_att_family,
|
|
{ "Protocol Family", "classicstun.att.family", FT_UINT16,
|
|
BASE_HEX, VALS(attributes_family), 0x0, NULL, HFILL }
|
|
},
|
|
{ &classicstun_att_ipv4,
|
|
{ "IP", "classicstun.att.ipv4", FT_IPv4,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &classicstun_att_ipv6,
|
|
{ "IP", "classicstun.att.ipv6", FT_IPv6,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &classicstun_att_port,
|
|
{ "Port", "classicstun.att.port", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &classicstun_att_change_ip,
|
|
{ "Change IP","classicstun.att.change.ip", FT_BOOLEAN,
|
|
16, TFS(&tfs_set_notset), 0x0004, NULL, HFILL}
|
|
},
|
|
{ &classicstun_att_change_port,
|
|
{ "Change Port","classicstun.att.change.port", FT_BOOLEAN,
|
|
16, TFS(&tfs_set_notset), 0x0002, NULL, HFILL}
|
|
},
|
|
{ &classicstun_att_unknown,
|
|
{ "Unknown Attribute","classicstun.att.unknown", FT_UINT16,
|
|
BASE_HEX, NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{ &classicstun_att_error_class,
|
|
{ "Error Class","classicstun.att.error.class", FT_UINT8,
|
|
BASE_DEC, NULL, 0x07, NULL, HFILL}
|
|
},
|
|
{ &classicstun_att_error_number,
|
|
{ "Error Code","classicstun.att.error", FT_UINT8,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{ &classicstun_att_error_reason,
|
|
{ "Error Reason Phase","classicstun.att.error.reason", FT_STRING,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{ &classicstun_att_xor_ipv4,
|
|
{ "IP (XOR-d)", "classicstun.att.ipv4-xord", FT_IPv4,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &classicstun_att_xor_ipv6,
|
|
{ "IP (XOR-d)", "classicstun.att.ipv6-xord", FT_IPv6,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &classicstun_att_xor_port,
|
|
{ "Port (XOR-d)", "classicstun.att.port-xord", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &classicstun_att_server_string,
|
|
{ "Server version","classicstun.att.server", FT_STRING,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{ &classicstun_att_lifetime,
|
|
{ "Lifetime", "classicstun.att.lifetime", FT_UINT32,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &classicstun_att_magic_cookie,
|
|
{ "Magic Cookie", "classicstun.att.magic.cookie", FT_UINT32,
|
|
BASE_HEX, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &classicstun_att_bandwidth,
|
|
{ "Bandwidth", "classicstun.att.bandwidth", FT_UINT32,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &classicstun_att_data,
|
|
{ "Data", "classicstun.att.data", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &classicstun_att_connection_request_binding,
|
|
{ "Connection Request Binding", "classicstun.att.connection_request_binding", FT_STRING,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] = {
|
|
&ett_classicstun,
|
|
&ett_classicstun_att_type,
|
|
&ett_classicstun_att,
|
|
};
|
|
|
|
/* Register the protocol name and description */
|
|
proto_classicstun = proto_register_protocol("Simple Traversal of UDP Through NAT",
|
|
"CLASSICSTUN", "classicstun");
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
proto_register_field_array(proto_classicstun, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
new_register_dissector("classicstun", dissect_classicstun, proto_classicstun);
|
|
new_register_dissector("classicstun-heur", dissect_classicstun_heur, proto_classicstun);
|
|
}
|
|
|
|
|
|
void
|
|
proto_reg_handoff_classicstun(void)
|
|
{
|
|
#if 0 /* The stun dissector registers on these ports */
|
|
dissector_handle_t classicstun_handle;
|
|
|
|
classicstun_handle = find_dissector("classicstun");
|
|
|
|
dissector_add_uint("tcp.port", TCP_PORT_STUN, classicstun_handle);
|
|
dissector_add_uint("udp.port", UDP_PORT_STUN, classicstun_handle);
|
|
#endif
|
|
heur_dissector_add("udp", dissect_classicstun_heur, proto_classicstun);
|
|
heur_dissector_add("tcp", dissect_classicstun_heur, proto_classicstun);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://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:
|
|
*/
|