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wireshark/epan/dissectors/packet-classicstun.c

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/* 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
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* Please refer to RFC 3489 for protocol detail.
* (supports extra message attributes described in draft-ietf-behave-rfc3489bis-00)
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/conversation.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, clear_port;
guint32 clear_ip;
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_captured_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->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->num;
classicstun_trans->rep_frame=0;
classicstun_trans->req_time=pinfo->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->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->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->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. */
clear_port = tvb_get_ntohs(tvb, offset+2) ^ (transaction_id_first_word >> 16);
ti = proto_tree_add_uint(att_tree, classicstun_att_port, tvb, offset+2, 2, clear_port);
PROTO_ITEM_SET_GENERATED(ti);
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. */
clear_ip = tvb_get_ipv4(tvb, offset+4) ^ g_htonl(transaction_id_first_word);
ti = proto_tree_add_ipv4(att_tree, classicstun_att_ipv4, tvb, offset+4, 4, clear_ip);
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_reported_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));
register_dissector("classicstun", dissect_classicstun, proto_classicstun);
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_with_preference("tcp.port", TCP_PORT_STUN, classicstun_handle);
dissector_add_uint_with_preference("udp.port", UDP_PORT_STUN, classicstun_handle);
#endif
heur_dissector_add("udp", dissect_classicstun_heur, "Classic STUN over UDP", "classicstun_udp", proto_classicstun, HEURISTIC_ENABLE);
heur_dissector_add("tcp", dissect_classicstun_heur, "Classic STUN over TCP", "classicstun_tcp", proto_classicstun, HEURISTIC_ENABLE);
}
/*
* 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:
*/
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