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wireshark/packet-ldp.c

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/* packet-ldp.c
* Routines for ldp packet disassembly
*
* $Id: packet-ldp.c,v 1.19 2001/07/21 10:27:12 guy Exp $
*
* Copyright (c) November 2000 by Richard Sharpe <rsharpe@ns.aus.com>
*
* Ethereal - Network traffic analyzer
* By Gerald Combs
* Copyright 1999 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
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <time.h>
#include <glib.h>
#include <string.h>
#include "packet.h"
#include "resolv.h"
#include "prefs.h"
#include "afn.h"
#define TCP_PORT_LDP 646
#define UDP_PORT_LDP 646
void proto_reg_handoff_ldp(void);
static int proto_ldp = -1;
/* Delete the following if you do not use it, or add to it if you need */
static int hf_ldp_req = -1;
static int hf_ldp_rsp = -1;
static int hf_ldp_version = -1;
static int hf_ldp_pdu_len = -1;
static int hf_ldp_lsr = -1;
static int hf_ldp_ls_id = -1;
static int hf_ldp_msg_type = -1;
static int hf_ldp_msg_len = -1;
static int hf_ldp_msg_id = -1;
static int hf_ldp_tlv_value = -1;
static int hf_ldp_tlv_type = -1;
static int hf_ldp_tlv_len = -1;
static int hf_ldp_tlv_val_hold = -1;
static int hf_ldp_tlv_val_target = -1;
static int hf_ldp_tlv_val_request = -1;
static int hf_ldp_tlv_val_res = -1;
static int hf_ldp_tlv_config_seqno = -1;
static int hf_ldp_tlv_fec_wc = -1;
static int hf_ldp_tlv_fec_af = -1;
static int hf_ldp_tlv_fec_len = -1;
static int hf_ldp_tlv_fec_pfval = -1;
static int hf_ldp_tlv_generic_label = -1;
static int ett_ldp = -1;
static int ett_ldp_header = -1;
static int ett_ldp_ldpid = -1;
static int ett_ldp_message = -1;
static int ett_ldp_tlv = -1;
static int ett_ldp_tlv_val = -1;
static int ett_ldp_fec = -1;
static int tcp_port = 0;
static int udp_port = 0;
/* Add your functions here */
static int global_ldp_tcp_port = TCP_PORT_LDP;
static int global_ldp_udp_port = UDP_PORT_LDP;
/*
* The following define all the TLV types I know about
*/
#define TLV_FEC 0x0100
#define TLV_ADDRESS_LIST 0x0101
#define TLV_HOP_COUNT 0x0103
#define TLV_PATH_VECTOR 0x0104
#define TLV_GENERIC_LABEL 0x0200
#define TLV_ATM_LABEL 0x0201
#define TLV_FRAME_LABEL 0x0202
#define TLV_STATUS 0x0300
#define TLV_EXTENDED_STATUS 0x0301
#define TLV_RETURNED_PDU 0x0302
#define TLV_RETURNED_MESSAGE 0x0303
#define TLV_COMMON_HELLO_PARMS 0x0400
#define TLV_IPV4_TRANSPORT_ADDRESS 0x0401
#define TLV_CONFIGURATION_SEQNO 0x0402
#define TLV_IPV6_TRANSPORT_ADDRESS 0x0403
#define TLV_COMMON_SESSION_PARMS 0x0500
#define TLV_ATM_SESSION_PARMS 0x0501
#define TLV_FRAME_RELAY_SESSION_PARMS 0x0502
#define TLV_LABEL_REQUEST_MESSAGE_ID 0x0600
#define TLV_VENDOR_PRIVATE_START 0x3E00
#define TLV_VENDOR_PROVATE_END 0x3EFF
#define TLV_EXPERIMENTAL_START 0x3F00
#define TLV_EXPERIMENTAL_END 0x3FFF
static const value_string tlv_type_names[] = {
{ TLV_FEC, "Forwarding Equivalence Classes" },
{ TLV_ADDRESS_LIST, "Address List"},
{ TLV_HOP_COUNT, "Hop Count"},
{ TLV_PATH_VECTOR, "Path Vector"},
{ TLV_GENERIC_LABEL, "Generic Label"},
{ TLV_ATM_LABEL, "Frame Label"},
{ TLV_STATUS, "Status"},
{ TLV_EXTENDED_STATUS, "Extended Status"},
{ TLV_RETURNED_PDU, "Returned PDU"},
{ TLV_RETURNED_MESSAGE, "Returned Message"},
{ TLV_COMMON_HELLO_PARMS, "Common Hello Parameters"},
{ TLV_IPV4_TRANSPORT_ADDRESS, "IPv4 Transport Address"},
{ TLV_CONFIGURATION_SEQNO, "Configuration Sequence Number"},
{ TLV_IPV6_TRANSPORT_ADDRESS, "IPv6 Transport Address"},
{ TLV_COMMON_SESSION_PARMS, "Common Session Parameters"},
{ TLV_ATM_SESSION_PARMS, "ATM Session Parameters"},
{ TLV_FRAME_RELAY_SESSION_PARMS, "Frame Relay Session Parameters"},
{ TLV_LABEL_REQUEST_MESSAGE_ID, "Label Request Message ID"},
{ 0, NULL}
};
/*
* The following define all the message types I know about
*/
#define LDP_NOTIFICATION 0x0001
#define LDP_HELLO 0x0100
#define LDP_INITIALIZATION 0x0200
#define LDP_KEEPALIVE 0x0201
#define LDP_ADDRESS 0x0300
#define LDP_ADDRESS_WITHDRAWAL 0x0301
#define LDP_LABEL_MAPPING 0x0400
#define LDP_LABEL_REQUEST 0x0401
#define LDP_LABEL_WITHDRAWAL 0x0402
#define LDP_LABEL_RELEASE 0x0403
#define LDP_LABEL_ABORT_REQUEST 0x0404
#define LDP_VENDOR_PRIVATE_START 0x3E00
#define LDP_VENDOR_PRIVATE_END 0x3EFF
#define LDP_EXPERIMENTAL_MESSAGE_START 0x3F00
#define LDP_EXPERIMENTAL_MESSAGE_END 0x3FFF
static const value_string ldp_message_types[] = {
{LDP_NOTIFICATION, "Notification"},
{LDP_HELLO, "Hello"},
{LDP_INITIALIZATION, "Initialization"},
{LDP_KEEPALIVE, "Keep Alive"},
{LDP_ADDRESS, "Address"},
{LDP_ADDRESS_WITHDRAWAL, "Address Withdrawal"},
{LDP_LABEL_MAPPING, "Label Mapping"},
{LDP_LABEL_REQUEST, "Label Request"},
{LDP_LABEL_WITHDRAWAL, "Label Withdrawal"},
{LDP_LABEL_RELEASE, "Label Release"},
{LDP_LABEL_ABORT_REQUEST, "Label Abort Request"},
{0, NULL}
};
static const true_false_string hello_targeted_vals = {
"Targeted Hello",
"Link Hello"
};
static const value_string fec_types[] = {
{1, "Wildcard FEC"},
{2, "Prefix FEC"},
{3, "Host Address FEC"},
{0, NULL}
};
static const true_false_string hello_requested_vals = {
"Source requests periodic hellos",
"Source does not request periodic hellos"
};
/* Dissect the common hello params */
void dissect_tlv_common_hello_parms(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
{
proto_tree *ti = NULL, *val_tree = NULL;
if (tree) {
ti = proto_tree_add_item(tree, hf_ldp_tlv_value, tvb, offset, rem,
FALSE);
val_tree = proto_item_add_subtree(ti, ett_ldp_tlv_val);
proto_tree_add_item(val_tree, hf_ldp_tlv_val_hold, tvb, offset, 2, FALSE);
proto_tree_add_boolean(val_tree, hf_ldp_tlv_val_target, tvb, offset + 2, 2, FALSE);
proto_tree_add_boolean(val_tree, hf_ldp_tlv_val_request, tvb, offset + 2, 2, FALSE);
proto_tree_add_item(val_tree, hf_ldp_tlv_val_res, tvb, offset + 2, 2, FALSE);
}
}
/* Dissect a TLV and return the number of bytes consumed ... */
int dissect_tlv(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
{
guint16 message = tvb_get_ntohs(tvb, offset),
length = tvb_get_ntohs(tvb, offset + 2),
pad = 0, fec_len = 0;
proto_tree *ti = NULL, *tlv_tree = NULL;
/* Hmmm, check for illegal alignment padding */
if (message == 0x00) {
proto_tree_add_text(tree, tvb, offset, 2, "Illegal Padding: %04X", message);
offset += 2; pad = 2;
message = tvb_get_ntohs(tvb, offset);
length = tvb_get_ntohs(tvb, offset + 2);
}
length = MIN(length, rem); /* Don't go haywire if a problem ... */
if (tree) {
/* FIXME: Account for vendor and special messages */
ti = proto_tree_add_text(tree, tvb, offset, length + 4, "%s",
val_to_str(message, tlv_type_names, "Unknown TLV type (0x%04X)"));
tlv_tree = proto_item_add_subtree(ti, ett_ldp_tlv);
proto_tree_add_item(tlv_tree, hf_ldp_tlv_type, tvb, offset, 2, FALSE);
proto_tree_add_item(tlv_tree, hf_ldp_tlv_len, tvb, offset + 2, 2, FALSE);
switch (message) {
case TLV_FEC: /* Process an FEC */
offset += 4; /* Skip the TLV header */
fec_len = length;
while (fec_len > 0) {
proto_tree *fec_tree = NULL;
guint prefix_len_octets, prefix_len, prefix;
switch (tvb_get_guint8(tvb, offset)) {
case 1: /* Wild Card */
proto_tree_add_item(tlv_tree, hf_ldp_tlv_fec_wc, tvb, offset, 4, FALSE);
fec_len -= 4;
offset += 4;
break;
case 2: /* Prefix */
/* Add a subtree for this ... */
ti = proto_tree_add_text(tlv_tree, tvb, offset, 8, "Prefix FEC Element");
fec_tree = proto_item_add_subtree(ti, ett_ldp_fec);
proto_tree_add_item(fec_tree, hf_ldp_tlv_fec_wc, tvb, offset, 1, FALSE);
offset += 1;
/* XXX - the address family length should be extracted and used to
dissect the prefix field. */
proto_tree_add_item(fec_tree, hf_ldp_tlv_fec_af, tvb, offset, 2, FALSE);
offset += 2;
prefix_len = tvb_get_guint8(tvb, offset);
proto_tree_add_item(fec_tree, hf_ldp_tlv_fec_len, tvb, offset, 1, FALSE);
offset += 1;
/* This is IPv4 specific. Should do IPv6 according to AF*/
prefix_len_octets = MIN( (prefix_len+7)/8 , 4 );
if (prefix_len > 32) {
proto_tree_add_text(fec_tree, tvb, offset, 0,
"Invalid prefix %u length, guessing 32", prefix_len);
prefix_len_octets = 4;
}
switch (prefix_len_octets){
case (0): /*prefix_length=0*/
prefix = 0;
break;
case (1): /*1<=prefix_length<=8*/
prefix = tvb_get_guint8(tvb, offset);
break;
case (2): /*9<=prefix_length<=16*/
prefix = tvb_get_letohs(tvb, offset);
break;
case (3): /*17<=prefix_length<=24*/
prefix = tvb_get_letoh24(tvb, offset);
break;
case (4): /*25<=prefix_length<=32*/
prefix = tvb_get_letohl(tvb, offset);
break;
default: /*prefix_length>32*/
g_assert_not_reached();
prefix = 0;
break;
}
proto_tree_add_ipv4(fec_tree, hf_ldp_tlv_fec_pfval, tvb,
offset, prefix_len_octets, prefix);
fec_len -= 4+prefix_len_octets;
break;
case 3: /* Host address */
/* XXX - write me. */
fec_len -= 8;
offset += 8;
break;
default: /* Unknown */
/* XXX - do all FEC's have a length that's a multiple of 4? */
/* Hmmm, don't think so. Will check. RJS. */
fec_len -= 4;
offset += 4;
break;
}
}
break;;
case TLV_GENERIC_LABEL:
proto_tree_add_item(tlv_tree, hf_ldp_tlv_generic_label, tvb, offset + 4, 4, FALSE);
break;
case TLV_COMMON_HELLO_PARMS:
dissect_tlv_common_hello_parms(tvb, offset + 4, tlv_tree, length);
break;
case TLV_CONFIGURATION_SEQNO:
proto_tree_add_item(tlv_tree, hf_ldp_tlv_config_seqno, tvb, offset + 4, 4, FALSE);
break;
default:
proto_tree_add_item(tlv_tree, hf_ldp_tlv_value, tvb, offset + 4,
length, FALSE);
break;
}
}
return length + pad + 4; /* Length of the value field + header */
}
/*
* Each of these routines dissect the relevant messages, but the msg header
* has already been dissected.
*/
void
dissect_ldp_notification(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, guint length)
{
guint rem = length, cc = 0;
while (rem > 0) {
rem -= (cc = dissect_tlv(tvb, offset, tree, rem));
offset += cc;
}
}
/* Dissect a Hello Message ... */
void
dissect_ldp_hello(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, guint length)
{
guint rem = length, cc = 0;
while (rem > 0) {
rem -= (cc = dissect_tlv(tvb, offset, tree, rem));
offset += cc;
}
}
void
dissect_ldp_initialization(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, guint length)
{
guint rem = length, cc = 0;
while (rem > 0) {
rem -= (cc = dissect_tlv(tvb, offset, tree, rem));
offset += cc;
}
}
void
dissect_ldp_keepalive(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, guint length)
{
guint rem = length, cc = 0;
while (rem > 0) {
rem -= (cc = dissect_tlv(tvb, offset, tree, rem));
offset += cc;
}
}
void
dissect_ldp_address(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, guint length)
{
guint rem = length, cc = 0;
while (rem > 0) {
rem -= (cc = dissect_tlv(tvb, offset, tree, rem));
offset += cc;
}
}
void
dissect_ldp_address_withdrawal(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, guint length)
{
guint rem = length, cc = 0;
while (rem > 0) {
rem -= (cc = dissect_tlv(tvb, offset, tree, rem));
offset += cc;
}
}
void
dissect_ldp_label_mapping(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, guint length)
{
guint rem = length, cc = 0;
while (rem > 0) {
rem -= (cc = dissect_tlv(tvb, offset, tree, rem));
offset += cc;
}
}
void
dissect_ldp_label_request(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, guint length)
{
guint rem = length, cc = 0;
while (rem > 0) {
rem -= (cc = dissect_tlv(tvb, offset, tree, rem));
offset += cc;
}
}
void
dissect_ldp_label_withdrawal(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, guint length)
{
guint rem = length, cc = 0;
while (rem > 0) {
rem -= (cc = dissect_tlv(tvb, offset, tree, rem));
offset += cc;
}
}
void
dissect_ldp_label_release(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, guint length)
{
guint rem = length, cc = 0;
while (rem > 0) {
rem -= (cc = dissect_tlv(tvb, offset, tree, rem));
offset += cc;
}
}
void
dissect_ldp_label_abort_request(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, guint length)
{
guint rem = length, cc = 0;
while (rem > 0) {
rem -= (cc = dissect_tlv(tvb, offset, tree, rem));
offset += cc;
}
}
static void
dissect_ldp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_tree *ldp_tree = NULL,
*ti = NULL,
*hdr_tree = NULL, *ldpid_tree = NULL;
int offset = 0, msg_cnt = 0;
guint16 ldp_message = 0;
if (check_col(pinfo->fd, COL_PROTOCOL))
col_add_str(pinfo->fd, COL_PROTOCOL, "LDP");
if (check_col(pinfo->fd, COL_INFO))
col_clear(pinfo->fd, COL_INFO);
if (tree) { /* Build the tree info ..., this is wrong! FIXME */
ti = proto_tree_add_item(tree, proto_ldp, tvb, offset,
tvb_length_remaining(tvb, offset), FALSE);
ldp_tree = proto_item_add_subtree(ti, ett_ldp);
ti = proto_tree_add_text(ldp_tree, tvb, 0, 10, "Header");
hdr_tree = proto_item_add_subtree(ti, ett_ldp_header);
proto_tree_add_item(hdr_tree, hf_ldp_version, tvb, offset, 2, FALSE);
offset += 2;
proto_tree_add_item(hdr_tree, hf_ldp_pdu_len, tvb, offset, 2, FALSE);
offset += 2;
ti = proto_tree_add_text(hdr_tree, tvb, offset, 6, "LDP Identifier");
ldpid_tree = proto_item_add_subtree(ti, ett_ldp_ldpid);
proto_tree_add_item(ldpid_tree, hf_ldp_lsr, tvb, offset, 4, FALSE);
offset += 4;
proto_tree_add_item(ldpid_tree, hf_ldp_ls_id, tvb, offset, 2, FALSE);
offset += 2;
}
offset = 10;
while (tvb_length_remaining(tvb, offset) > 0) { /* Dissect a message */
guint msg_len;
ldp_message = tvb_get_ntohs(tvb, offset) & 0x7FFF; /* Get the message type */
msg_len = tvb_get_ntohs(tvb, offset + 2);
if (check_col(pinfo->fd, COL_INFO)) { /* Check the type ... */
if (msg_cnt > 0)
col_append_fstr(pinfo->fd, COL_INFO, ", %s",
val_to_str(ldp_message, ldp_message_types, "Unknown Message (0x%04X)"));
else
col_add_fstr(pinfo->fd, COL_INFO, "%s",
val_to_str(ldp_message, ldp_message_types, "Unknown Message (0x%04X)"));
}
msg_cnt++;
if (tree) {
proto_tree *ti = NULL, *msg_tree = NULL;
/* FIXME: Account for vendor and experimental messages */
ti = proto_tree_add_text(ldp_tree, tvb, offset, msg_len + 4, "%s",
val_to_str(ldp_message, ldp_message_types, "Unknown Message (0x%04X)"));
msg_tree = proto_item_add_subtree(ti, ett_ldp_message);
proto_tree_add_item(msg_tree, hf_ldp_msg_type, tvb, offset, 2, FALSE);
proto_tree_add_item(msg_tree, hf_ldp_msg_len, tvb, offset + 2, 2, FALSE);
proto_tree_add_item(msg_tree, hf_ldp_msg_id, tvb, offset + 4, 4, FALSE);
switch (ldp_message) {
case LDP_NOTIFICATION:
dissect_ldp_notification(tvb, offset + 8, pinfo, msg_tree, msg_len - 4);
break;
case LDP_HELLO:
dissect_ldp_hello(tvb, offset + 8, pinfo, msg_tree, msg_len - 4);
break;
case LDP_INITIALIZATION:
dissect_ldp_initialization(tvb, offset + 8, pinfo, msg_tree, msg_len - 4);
break;
case LDP_KEEPALIVE:
dissect_ldp_keepalive(tvb, offset + 8, pinfo, msg_tree, msg_len - 4);
break;
case LDP_ADDRESS:
dissect_ldp_address(tvb, offset + 8, pinfo, msg_tree, msg_len - 4);
break;
case LDP_ADDRESS_WITHDRAWAL:
dissect_ldp_address_withdrawal(tvb, offset + 8, pinfo, msg_tree, msg_len - 4);
break;
case LDP_LABEL_MAPPING:
dissect_ldp_label_mapping(tvb, offset + 8, pinfo, msg_tree, msg_len - 4);
break;
case LDP_LABEL_REQUEST:
dissect_ldp_label_request(tvb, offset + 8, pinfo, msg_tree, msg_len - 4);
break;
case LDP_LABEL_WITHDRAWAL:
dissect_ldp_label_withdrawal(tvb, offset + 8, pinfo, msg_tree, msg_len - 4);
break;
case LDP_LABEL_RELEASE:
dissect_ldp_label_release(tvb, offset + 8, pinfo, msg_tree, msg_len - 4);
break;
case LDP_LABEL_ABORT_REQUEST:
dissect_ldp_label_abort_request(tvb, offset + 8, pinfo, msg_tree, msg_len - 4);
break;
default:
/* Some sort of unknown message, treat as undissected data */
break;
}
}
offset += msg_len + 4;
}
}
/* Register all the bits needed with the filtering engine */
void
proto_register_ldp(void)
{
static hf_register_info hf[] = {
{ &hf_ldp_req,
/* Change the following to the type you need */
{ "Request", "ldp.req", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "", HFILL }},
{ &hf_ldp_rsp,
{ "Response", "ldp.rsp", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "", HFILL }},
{ &hf_ldp_version,
{ "Version", "ldp.hdr.version", FT_UINT16, BASE_DEC, NULL, 0x0, "LDP Version Number", HFILL }},
{ &hf_ldp_pdu_len,
{ "PDU Length", "ldp.hdr.pdu_len", FT_UINT16, BASE_DEC, NULL, 0x0, "LDP PDU Length", HFILL }},
{ &hf_ldp_lsr,
{ "LSR ID", "ldp.hdr.ldpid.lsr", FT_UINT32, BASE_HEX, NULL, 0x0, "LDP Label Space Router ID", HFILL }},
{ &hf_ldp_ls_id,
{ "Label Space ID", "ldp.hdr.ldpid.lsid", FT_UINT16, BASE_HEX, NULL, 0x0, "LDP Label Space ID", HFILL }},
{ &hf_ldp_msg_type,
{ "Message Type", "ldp.msg.type", FT_UINT16, BASE_HEX, VALS(ldp_message_types), 0x0, "LDP message type", HFILL }},
{ &hf_ldp_msg_len,
{ "Message Length", "ldp.msg.len", FT_UINT16, BASE_DEC, NULL, 0x0, "LDP Message Length (excluding message type and len)", HFILL }},
{ &hf_ldp_msg_id,
{ "Message ID", "ldp.msg.id", FT_UINT32, BASE_HEX, NULL, 0x0, "LDP Message ID", HFILL }},
{ &hf_ldp_tlv_type,
{ "TLV Type", "ldp.msg.tlv.type", FT_UINT16, BASE_HEX, VALS(tlv_type_names), 0x0, "TLV Type Field", HFILL }},
{ &hf_ldp_tlv_len,
{"TLV Length", "ldp.msg.tlv.len", FT_UINT16, BASE_DEC, NULL, 0x0, "TLV Length Field", HFILL }},
{ &hf_ldp_tlv_value,
{ "TLV Value", "ldp.msg.tlv.value", FT_BYTES, BASE_NONE, NULL, 0x0, "TLV Value Bytes", HFILL }},
{ &hf_ldp_tlv_val_hold,
{ "Hold Time", "ldp.msg.tlv.hello.hold", FT_UINT16, BASE_DEC, NULL, 0x0, "Hello Common Parameters Hold Time", HFILL }},
{ &hf_ldp_tlv_val_target,
{ "Targeted Hello", "ldp.msg.tlv.hello.targeted", FT_BOOLEAN, 8, TFS(&hello_targeted_vals), 0x80, "Hello Common Parameters Targeted Bit", HFILL }},
{ &hf_ldp_tlv_val_request,
{ "Hello Requested", "ldp,msg.tlv.hello.requested", FT_BOOLEAN, 8, TFS(&hello_requested_vals), 0x40, "Hello Common Parameters Hello Requested Bit", HFILL }},
{ &hf_ldp_tlv_val_res,
{ "Reserved", "ldp.msg.tlv.hello.res", FT_UINT16, BASE_HEX, NULL, 0x3FFF, "Hello Common Parameters Reserved Field", HFILL }},
{ &hf_ldp_tlv_config_seqno,
{ "Configuration Sequence Number", "ldp.msg.tlv.hello.cnf_seqno", FT_UINT32, BASE_HEX, NULL, 0x0, "Hello COnfiguration Sequence Number", HFILL }},
{ &hf_ldp_tlv_fec_wc,
{ "FEC Element Type", "ldp.msg.tlv.fec.type", FT_UINT8, BASE_DEC, VALS(fec_types), 0x0, "Forwarding Equivalence Class Element Types", HFILL }},
{ &hf_ldp_tlv_fec_af,
{ "FEC Element Address Type", "ldp.msg.tlv.fec.af", FT_UINT16, BASE_DEC, VALS(afn_vals), 0x0, "Forwarding Equivalence Class Element Address Family", HFILL }},
{ &hf_ldp_tlv_fec_len,
{ "FEC Element Length", "ldp.msg.tlv.fec.len", FT_UINT8, BASE_DEC, NULL, 0x0, "Forwarding Equivalence Class Element Length", HFILL }},
{ &hf_ldp_tlv_fec_pfval,
{ "FEC Element Prefix Value", "ldp.msg.tlv.fec.pfval", FT_IPv4, BASE_DEC, NULL, 0x0, "Forwarding Equivalence Class Element Prefix", HFILL }},
{ &hf_ldp_tlv_generic_label,
{ "Generic Label", "ldp.msg.tlv.label", FT_UINT32, BASE_HEX, NULL, 0x0, "Label Mapping Generic Label", HFILL }},
};
static gint *ett[] = {
&ett_ldp,
&ett_ldp_header,
&ett_ldp_ldpid,
&ett_ldp_message,
&ett_ldp_tlv,
&ett_ldp_tlv_val,
&ett_ldp_fec,
};
module_t *ldp_module;
proto_ldp = proto_register_protocol("Label Distribution Protocol",
"LDP", "ldp");
proto_register_field_array(proto_ldp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
/* Register our configuration options for , particularly our port */
ldp_module = prefs_register_protocol(proto_ldp, proto_reg_handoff_ldp);
prefs_register_uint_preference(ldp_module, "tcp.port", "LDP TCP Port",
"Set the port for messages (if other"
" than the default of 646)",
10, &global_ldp_tcp_port);
prefs_register_uint_preference(ldp_module, "udp.port", "LDP UDP Port",
"Set the port for messages (if other"
" than the default of 646)",
10, &global_ldp_udp_port);
}
/* The registration hand-off routine */
void
proto_reg_handoff_ldp(void)
{
static int ldp_prefs_initialized = FALSE;
if (ldp_prefs_initialized) {
dissector_delete("tcp.port", tcp_port, dissect_ldp);
dissector_delete("udp.port", udp_port, dissect_ldp);
}
else {
ldp_prefs_initialized = TRUE;
}
/* Set our port number for future use */
tcp_port = global_ldp_tcp_port;
udp_port = global_ldp_udp_port;
dissector_add("tcp.port", global_ldp_tcp_port, dissect_ldp, proto_ldp);
dissector_add("udp.port", global_ldp_udp_port, dissect_ldp, proto_ldp);
}
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