wireshark/asn1/ldap/packet-ldap-template.c

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/* packet-ldap.c
* Routines for ldap packet dissection
*
* See RFC 1777 (LDAP v2), RFC 2251 (LDAP v3), and RFC 2222 (SASL).
*
* $Id$
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/*
* This is not a complete implementation. It doesn't handle the full version 3, more specifically,
* it handles only the commands of version 2, but any additional characteristics of the ver3 command are supported.
* It's also missing extensible search filters.
*
* There should probably be alot more error checking, I simply assume that if we have a full packet, it will be a complete
* and correct packet.
*
* AFAIK, it will handle all messages used by the OpenLDAP 1.2.9 server and libraries which was my goal. I do plan to add
* the remaining commands as time permits but this is not a priority to me. Send me an email if you need it and I'll see what
* I can do.
*
* Doug Nazar
* nazard@dragoninc.on.ca
*/
/*
* 11/11/2002 - Fixed problem when decoding LDAP with desegmentation enabled and the
* ASN.1 BER Universal Class Tag: "Sequence Of" header is encapsulated across 2
* TCP segments.
*
* Ronald W. Henderson
* ronald.henderson@cognicaseusa.com
*/
/*
* 20-JAN-2004 - added decoding of MS-CLDAP netlogon RPC
* using information from the SNIA 2003 conference paper :
* Active Directory Domain Controller Location Service
* by Anthony Liguori
* ronnie sahlberg
*/
/*
* 17-DEC-2004 - added basic decoding for LDAP Controls
* 20-DEC-2004 - added handling for GSS-API encrypted blobs
*
* Stefan Metzmacher <metze@samba.org>
*
* 15-NOV-2005 - Changed to use the asn2eth compiler
* Anders Broman <anders.broman@ericsson.com>
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <string.h>
#include <glib.h>
#include <epan/packet.h>
#include <epan/conversation.h>
#include <epan/prefs.h>
#include <epan/conversation.h>
#include <epan/tap.h>
#include <epan/emem.h>
#include "packet-frame.h"
#include "packet-ldap.h"
#include "packet-ber.h"
#include "packet-per.h"
#define PNAME "Lightweight-Directory-Access-Protocol"
#define PSNAME "LDAP"
#define PFNAME "ldap"
static dissector_handle_t ldap_handle=NULL;
/* Initialize the protocol and registered fields */
static int ldap_tap = -1;
static int proto_ldap = -1;
static int proto_cldap = -1;
static int hf_ldap_sasl_buffer_length = -1;
#include "packet-ldap-hf.c"
/* Initialize the subtree pointers */
static gint ett_ldap = -1;
static gint ett_ldap_msg = -1;
static gint ett_ldap_sasl_blob = -1;
static guint ett_ldap_payload = -1;
#include "packet-ldap-ett.c"
/* desegmentation of LDAP */
static gboolean ldap_desegment = TRUE;
#define TCP_PORT_LDAP 389
#define UDP_PORT_CLDAP 389
#define TCP_PORT_GLOBALCAT_LDAP 3268 /* Windows 2000 Global Catalog */
static dissector_handle_t gssapi_handle;
static dissector_handle_t gssapi_wrap_handle;
/* different types of rpc calls ontop of ms cldap */
#define MSCLDAP_RPC_NETLOGON 1
/*
* Data structure attached to a conversation, giving authentication
* information from a bind request.
* We keep a linked list of them, so that we can free up all the
* authentication mechanism strings.
*/
typedef struct ldap_conv_info_t {
struct ldap_conv_info_t *next;
guint auth_type; /* authentication type */
char *auth_mech; /* authentication mechanism */
guint32 first_auth_frame; /* first frame that would use a security layer */
GHashTable *unmatched;
GHashTable *matched;
gboolean is_mscldap;
gboolean first_time;
} ldap_conv_info_t;
static ldap_conv_info_t *ldap_info_items;
static guint
ldap_info_hash_matched(gconstpointer k)
{
const ldap_call_response_t *key = k;
return key->messageId;
}
static gint
ldap_info_equal_matched(gconstpointer k1, gconstpointer k2)
{
const ldap_call_response_t *key1 = k1;
const ldap_call_response_t *key2 = k2;
if( key1->req_frame && key2->req_frame && (key1->req_frame!=key2->req_frame) ){
return 0;
}
if( key1->rep_frame && key2->rep_frame && (key1->rep_frame!=key2->rep_frame) ){
return 0;
}
return key1->messageId==key2->messageId;
}
static guint
ldap_info_hash_unmatched(gconstpointer k)
{
const ldap_call_response_t *key = k;
return key->messageId;
}
static gint
ldap_info_equal_unmatched(gconstpointer k1, gconstpointer k2)
{
const ldap_call_response_t *key1 = k1;
const ldap_call_response_t *key2 = k2;
return key1->messageId==key2->messageId;
}
/* Global variables */
guint32 MessageID;
guint32 AuthenticationChoice;
#include "packet-ldap-fn.c"
static void
dissect_ldap_payload(tvbuff_t *tvb, packet_info *pinfo,
proto_tree *tree, ldap_conv_info_t *ldap_info,
gboolean rest_is_pad, gboolean is_mscldap)
{
int offset = 0;
gboolean first_time = TRUE;
guint length_remaining;
guint msg_len = 0;
int messageOffset = 0;
guint headerLength = 0;
guint length = 0;
tvbuff_t *msg_tvb = NULL;
proto_item *msg_item = NULL;
proto_tree *msg_tree = NULL;
gint8 class;
gboolean pc, ind = 0;
gint32 ber_tag;
while (tvb_reported_length_remaining(tvb, offset) > 0) {
/*
* This will throw an exception if we don't have any data left.
* That's what we want. (See "tcp_dissect_pdus()", which is
* similar)
*/
length_remaining = tvb_ensure_length_remaining(tvb, offset);
if (rest_is_pad && length_remaining < 6) return;
/*
* The frame begins
* with a "Sequence Of" header.
* Can we do reassembly?
*/
if (ldap_desegment && pinfo->can_desegment) {
/*
* Yes - is the "Sequence Of" header split across segment
* boundaries? We require at least 6 bytes for the header
* which allows for a 4 byte length (ASN.1 BER).
*/
if (length_remaining < 6) {
/* stop if the caller says that we are given all data and the rest is padding
* this is for the SASL GSSAPI case when the data is only signed and not sealed
*/
pinfo->desegment_offset = offset;
pinfo->desegment_len = 6 - length_remaining;
return;
}
}
/*
* OK, try to read the "Sequence Of" header; this gets the total
* length of the LDAP message.
*/
messageOffset = get_ber_identifier(tvb, offset, &class, &pc, &ber_tag);
messageOffset = get_ber_length(tree, tvb, messageOffset, &msg_len, &ind);
if (ber_tag == BER_UNI_TAG_SEQUENCE) {
/*
* Add the length of the "Sequence Of" header to the message
* length.
*/
headerLength = messageOffset - offset;
msg_len += headerLength;
if (msg_len < headerLength) {
/*
* The message length was probably so large that the total length
* overflowed.
*
* Report this as an error.
*/
show_reported_bounds_error(tvb, pinfo, tree);
return;
}
} else {
/*
* We couldn't parse the header; just make it the amount of data
* remaining in the tvbuff, so we'll give up on this segment
* after attempting to parse the message - there's nothing more
* we can do. "dissect_ldap_message()" will display the error.
*/
msg_len = length_remaining;
}
/*
* Is the message split across segment boundaries?
*/
if (length_remaining < msg_len) {
/* provide a hint to TCP where the next PDU starts */
pinfo->want_pdu_tracking=2;
pinfo->bytes_until_next_pdu= msg_len - length_remaining;
/*
* Can we do reassembly?
*/
if (ldap_desegment && pinfo->can_desegment) {
/*
* Yes. Tell the TCP dissector where the data for this message
* starts in the data it handed us, and how many more bytes
* we need, and return.
*/
pinfo->desegment_offset = offset;
pinfo->desegment_len = msg_len - length_remaining;
return;
}
}
/*
* Construct a tvbuff containing the amount of the payload we have
* available. Make its reported length the amount of data in the
* LDAP message.
*
* XXX - if reassembly isn't enabled. the subdissector will throw a
* BoundsError exception, rather than a ReportedBoundsError exception.
* We really want a tvbuff where the length is "length", the reported
* length is "plen", and the "if the snapshot length were infinite"
* length is the minimum of the reported length of the tvbuff handed
* to us and "plen", with a new type of exception thrown if the offset
* is within the reported length but beyond that third length, with
* that exception getting the "Unreassembled Packet" error.
*/
length = length_remaining;
if (length > msg_len) length = msg_len;
msg_tvb = tvb_new_subset(tvb, offset, length, msg_len);
/*
* Now dissect the LDAP message.
*/
if (tree) {
msg_item = proto_tree_add_text(tree, msg_tvb, 0, msg_len, "LDAP Message");
msg_tree = proto_item_add_subtree(msg_item, ett_ldap_msg);
}
/*dissect_ldap_message(msg_tvb, 0, pinfo, msg_tree, msg_item, first_time, ldap_info, is_mscldap);*/
ldap_info->first_time= first_time;
ldap_info->is_mscldap = is_mscldap;
pinfo->private_data = ldap_info;
dissect_LDAPMessage_PDU(msg_tvb, pinfo, msg_tree);
offset += msg_len;
first_time = FALSE;
}
}
static void
dissect_ldap_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gboolean is_mscldap)
{
int offset = 0;
conversation_t *conversation;
gboolean doing_sasl_security = FALSE;
guint length_remaining;
ldap_conv_info_t *ldap_info = NULL;
proto_item *ldap_item = NULL;
proto_tree *ldap_tree = NULL;
/*
* Do we have a conversation for this connection?
*/
conversation = find_conversation(pinfo->fd->num, &pinfo->src, &pinfo->dst,
pinfo->ptype, pinfo->srcport,
pinfo->destport, 0);
if (conversation == NULL) {
/* We don't yet have a conversation, so create one. */
conversation = conversation_new(pinfo->fd->num, &pinfo->src, &pinfo->dst,
pinfo->ptype, pinfo->srcport,
pinfo->destport, 0);
}
/*
* Do we already have a type and mechanism?
*/
ldap_info = conversation_get_proto_data(conversation, proto_ldap);
if (ldap_info == NULL) {
/* No. Attach that information to the conversation, and add
* it to the list of information structures.
*/
ldap_info = se_alloc(sizeof(ldap_conv_info_t));
ldap_info->auth_type = 0;
ldap_info->auth_mech = 0;
ldap_info->first_auth_frame = 0;
ldap_info->matched=g_hash_table_new(ldap_info_hash_matched, ldap_info_equal_matched);
ldap_info->unmatched=g_hash_table_new(ldap_info_hash_unmatched, ldap_info_equal_unmatched);
conversation_add_proto_data(conversation, proto_ldap, ldap_info);
ldap_info->next = ldap_info_items;
ldap_info_items = ldap_info;
}
switch (ldap_info->auth_type) {
case LDAP_AUTH_SASL:
/*
* It's SASL; are we using a security layer?
*/
if (ldap_info->first_auth_frame != 0 &&
pinfo->fd->num >= ldap_info->first_auth_frame) {
doing_sasl_security = TRUE; /* yes */
}
}
while (tvb_reported_length_remaining(tvb, offset) > 0) {
/*
* This will throw an exception if we don't have any data left.
* That's what we want. (See "tcp_dissect_pdus()", which is
* similar, but doesn't have to deal with the SASL issues.
* XXX - can we make "tcp_dissect_pdus()" provide enough information
* to the "get_pdu_len" routine so that we could have one dealing
* with the SASL issues, have that routine deal with SASL and
* ASN.1, and just use "tcp_dissect_pdus()"?)
*/
length_remaining = tvb_ensure_length_remaining(tvb, offset);
/*
* Try to find out if we have a plain LDAP buffer
* with a "Sequence Of" header or a SASL buffer with
* Can we do reassembly?
*/
if (ldap_desegment && pinfo->can_desegment) {
/*
* Yes - is the "Sequence Of" header split across segment
* boundaries? We require at least 6 bytes for the header
* which allows for a 4 byte length (ASN.1 BER).
* For the SASL case we need at least 4 bytes, so this is
* no problem here because we check for 6 bytes ans sasl buffers
* with less than 2 bytes should not exist...
*/
if (length_remaining < 6) {
pinfo->desegment_offset = offset;
pinfo->desegment_len = 6 - length_remaining;
return;
}
}
/* It might still be a packet containing a SASL security layer
* but its just that we never saw the BIND packet.
* check if it looks like it could be a SASL blob here
* and in that case just assume it is GSS-SPNEGO
*/
if(!doing_sasl_security && (tvb_bytes_exist(tvb, offset, 5))
&&(tvb_get_ntohl(tvb, offset)<=(guint)(tvb_reported_length_remaining(tvb, offset)-4))
&&(tvb_get_guint8(tvb, offset+4)==0x60) ){
ldap_info->auth_type=LDAP_AUTH_SASL;
ldap_info->first_auth_frame=pinfo->fd->num;
ldap_info->auth_mech=g_strdup("GSS-SPNEGO");
doing_sasl_security=TRUE;
}
/*
* This is the first PDU, set the Protocol column and clear the
* Info column.
*/
if (check_col(pinfo->cinfo, COL_PROTOCOL)) col_set_str(pinfo->cinfo, COL_PROTOCOL, pinfo->current_proto);
if (check_col(pinfo->cinfo, COL_INFO)) col_clear(pinfo->cinfo, COL_INFO);
ldap_item = proto_tree_add_item(tree, proto_ldap, tvb, 0, -1, FALSE);
ldap_tree = proto_item_add_subtree(ldap_item, ett_ldap);
/*
* Might we be doing a SASL security layer and, if so, *are* we doing
* one?
*
* Just because we've seen a bind reply for SASL, that doesn't mean
* that we're using a SASL security layer; I've seen captures in
* which some SASL negotiations lead to a security layer being used
* and other negotiations don't, and it's not obvious what's different
* in the two negotiations. Therefore, we assume that if the first
* byte is 0, it's a length for a SASL security layer (that way, we
* never reassemble more than 16 megabytes, protecting us from
* chewing up *too* much memory), and otherwise that it's an LDAP
* message (actually, if it's an LDAP message it should begin with 0x30,
* but we want to parse garbage as LDAP messages rather than really
* huge lengths).
*/
if (doing_sasl_security && tvb_get_guint8(tvb, offset) == 0) {
proto_item *sasl_item = NULL;
proto_tree *sasl_tree = NULL;
tvbuff_t *sasl_tvb;
guint sasl_len, sasl_msg_len, length;
/*
* Yes. The frame begins with a 4-byte big-endian length.
* And we know we have at least 6 bytes
*/
/*
* Get the SASL length, which is the length of data in the buffer
* following the length (i.e., it's 4 less than the total length).
*
* XXX - do we need to reassemble buffers? For now, we
* assume that each LDAP message is entirely contained within
* a buffer.
*/
sasl_len = tvb_get_ntohl(tvb, offset);
sasl_msg_len = sasl_len + 4;
if (sasl_msg_len < 4) {
/*
* The message length was probably so large that the total length
* overflowed.
*
* Report this as an error.
*/
show_reported_bounds_error(tvb, pinfo, tree);
return;
}
/*
* Is the buffer split across segment boundaries?
*/
if (length_remaining < sasl_msg_len) {
/* provide a hint to TCP where the next PDU starts */
pinfo->want_pdu_tracking = 2;
pinfo->bytes_until_next_pdu= sasl_msg_len - length_remaining;
/*
* Can we do reassembly?
*/
if (ldap_desegment && pinfo->can_desegment) {
/*
* Yes. Tell the TCP dissector where the data for this message
* starts in the data it handed us, and how many more bytes we
* need, and return.
*/
pinfo->desegment_offset = offset;
pinfo->desegment_len = sasl_msg_len - length_remaining;
return;
}
}
/*
* Construct a tvbuff containing the amount of the payload we have
* available. Make its reported length the amount of data in the PDU.
*
* XXX - if reassembly isn't enabled. the subdissector will throw a
* BoundsError exception, rather than a ReportedBoundsError exception.
* We really want a tvbuff where the length is "length", the reported
* length is "plen", and the "if the snapshot length were infinite"
* length is the minimum of the reported length of the tvbuff handed
* to us and "plen", with a new type of exception thrown if the offset
* is within the reported length but beyond that third length, with
* that exception getting the "Unreassembled Packet" error.
*/
length = length_remaining;
if (length > sasl_msg_len) length = sasl_msg_len;
sasl_tvb = tvb_new_subset(tvb, offset, length, sasl_msg_len);
if (ldap_tree) {
proto_tree_add_uint(ldap_tree, hf_ldap_sasl_buffer_length, sasl_tvb, 0, 4,
sasl_len);
sasl_item = proto_tree_add_text(ldap_tree, sasl_tvb, 0, sasl_msg_len, "SASL buffer");
sasl_tree = proto_item_add_subtree(sasl_item, ett_ldap_sasl_blob);
}
if (ldap_info->auth_mech != NULL &&
strcmp(ldap_info->auth_mech, "GSS-SPNEGO") == 0) {
tvbuff_t *gssapi_tvb, *plain_tvb = NULL, *decr_tvb= NULL;
int ver_len;
int length;
/*
* This is GSS-API (using SPNEGO, but we should be done with
* the negotiation by now).
*
* Dissect the GSS_Wrap() token; it'll return the length of
* the token, from which we compute the offset in the tvbuff at
* which the plaintext data, i.e. the LDAP message, begins.
*/
length = tvb_length_remaining(sasl_tvb, 4);
if ((guint)length > sasl_len)
length = sasl_len;
gssapi_tvb = tvb_new_subset(sasl_tvb, 4, length, sasl_len);
/* Attempt decryption of the GSSAPI wrapped data if possible */
pinfo->decrypt_gssapi_tvb=DECRYPT_GSSAPI_NORMAL;
pinfo->gssapi_wrap_tvb=NULL;
pinfo->gssapi_encrypted_tvb=NULL;
pinfo->gssapi_decrypted_tvb=NULL;
ver_len = call_dissector(gssapi_wrap_handle, gssapi_tvb, pinfo, sasl_tree);
/* if we could unwrap, do a tvb shuffle */
if(pinfo->gssapi_decrypted_tvb){
decr_tvb=pinfo->gssapi_decrypted_tvb;
}
/* tidy up */
pinfo->decrypt_gssapi_tvb=0;
pinfo->gssapi_wrap_tvb=NULL;
pinfo->gssapi_encrypted_tvb=NULL;
pinfo->gssapi_decrypted_tvb=NULL;
/*
* if len is 0 it probably mean that we got a PDU that is not
* aligned to the start of the segment.
*/
if(ver_len==0){
return;
}
/*
* if we don't have unwrapped data,
* see if the wrapping involved encryption of the
* data; if not, just use the plaintext data.
*/
if (!decr_tvb) {
if(!pinfo->gssapi_data_encrypted){
plain_tvb = tvb_new_subset(gssapi_tvb, ver_len, -1, -1);
}
}
if (decr_tvb) {
proto_item *enc_item = NULL;
proto_tree *enc_tree = NULL;
/*
* The LDAP message was encrypted in the packet, and has
* been decrypted; dissect the decrypted LDAP message.
*/
if (sasl_tree) {
enc_item = proto_tree_add_text(sasl_tree, gssapi_tvb, ver_len, -1,
"GSS-API Encrypted payload (%d byte%s)",
sasl_len - ver_len,
plurality(sasl_len - ver_len, "", "s"));
enc_tree = proto_item_add_subtree(enc_item, ett_ldap_payload);
}
dissect_ldap_payload(decr_tvb, pinfo, enc_tree, ldap_info, TRUE, is_mscldap);
} else if (plain_tvb) {
proto_item *plain_item = NULL;
proto_tree *plain_tree = NULL;
/*
* The LDAP message wasn't encrypted in the packet;
* dissect the plain LDAP message.
*/
if (sasl_tree) {
plain_item = proto_tree_add_text(sasl_tree, gssapi_tvb, ver_len, -1,
"GSS-API payload (%d byte%s)",
sasl_len - ver_len,
plurality(sasl_len - ver_len, "", "s"));
plain_tree = proto_item_add_subtree(plain_item, ett_ldap_payload);
}
dissect_ldap_payload(plain_tvb, pinfo, plain_tree, ldap_info, TRUE, is_mscldap);
} else {
/*
* The LDAP message was encrypted in the packet, and was
* not decrypted; just show it as encrypted data.
*/
if (check_col(pinfo->cinfo, COL_INFO)) {
col_add_fstr(pinfo->cinfo, COL_INFO, "LDAP GSS-API Encrypted payload (%d byte%s)",
sasl_len - ver_len,
plurality(sasl_len - ver_len, "", "s"));
}
if (sasl_tree) {
proto_tree_add_text(sasl_tree, gssapi_tvb, ver_len, -1,
"GSS-API Encrypted payload (%d byte%s)",
sasl_len - ver_len,
plurality(sasl_len - ver_len, "", "s"));
}
}
}
offset += sasl_msg_len;
} else {
/* plain LDAP, so dissect the payload */
dissect_ldap_payload(tvb, pinfo, ldap_tree, ldap_info, FALSE, is_mscldap);
/* dissect_ldap_payload() has it's own loop so go out here */
break;
}
}
}
static void
dissect_ldap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
dissect_ldap_pdu(tvb, pinfo, tree, FALSE);
return;
}
static void
dissect_mscldap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
dissect_ldap_pdu(tvb, pinfo, tree, TRUE);
return;
}
static void
ldap_reinit(void)
{
ldap_conv_info_t *ldap_info;
/* Free up state attached to the ldap_info structures */
for (ldap_info = ldap_info_items; ldap_info != NULL; ldap_info = ldap_info->next) {
if (ldap_info->auth_mech != NULL) {
g_free(ldap_info->auth_mech);
ldap_info->auth_mech=NULL;
}
g_hash_table_destroy(ldap_info->matched);
ldap_info->matched=NULL;
g_hash_table_destroy(ldap_info->unmatched);
ldap_info->unmatched=NULL;
}
ldap_info_items = NULL;
}
/*--- proto_register_ldap -------------------------------------------*/
void proto_register_ldap(void) {
/* List of fields */
static hf_register_info hf[] = {
{ &hf_ldap_sasl_buffer_length,
{ "SASL Buffer Length", "ldap.sasl_buffer_length",
FT_UINT32, BASE_DEC, NULL, 0x0,
"SASL Buffer Length", HFILL }},
#include "packet-ldap-hfarr.c"
};
/* List of subtrees */
static gint *ett[] = {
&ett_ldap,
&ett_ldap_payload,
&ett_ldap_sasl_blob,
&ett_ldap_msg,
#include "packet-ldap-ettarr.c"
};
module_t *ldap_module;
/* Register protocol */
proto_ldap = proto_register_protocol(PNAME, PSNAME, PFNAME);
/* Register fields and subtrees */
proto_register_field_array(proto_ldap, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
register_dissector("ldap", dissect_ldap, proto_ldap);
ldap_module = prefs_register_protocol(proto_ldap, NULL);
prefs_register_bool_preference(ldap_module, "desegment_ldap_messages",
"Reassemble LDAP messages spanning multiple TCP segments",
"Whether the LDAP dissector should reassemble messages spanning multiple TCP segments."
" To use this option, you must also enable \"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
&ldap_desegment);
proto_cldap = proto_register_protocol(
"Connectionless Lightweight Directory Access Protocol",
"CLDAP", "cldap");
register_init_routine(ldap_reinit);
ldap_tap=register_tap("ldap");
}
/*--- proto_reg_handoff_ldap ---------------------------------------*/
void
proto_reg_handoff_ldap(void)
{
dissector_handle_t ldap_handle, cldap_handle;
ldap_handle = create_dissector_handle(dissect_ldap, proto_ldap);
dissector_add("tcp.port", TCP_PORT_LDAP, ldap_handle);
dissector_add("tcp.port", TCP_PORT_GLOBALCAT_LDAP, ldap_handle);
cldap_handle = create_dissector_handle(dissect_mscldap, proto_cldap);
dissector_add("udp.port", UDP_PORT_CLDAP, cldap_handle);
gssapi_handle = find_dissector("gssapi");
gssapi_wrap_handle = find_dissector("gssapi_verf");
}