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wireshark/epan/dissectors/packet-ldap.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
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <string.h>
#include <glib.h>
#ifdef NEED_SNPRINTF_H
# include "snprintf.h"
#endif
#include <epan/packet.h>
#include "asn1.h"
#include <epan/prefs.h>
#include <epan/conversation.h>
#include "packet-frame.h"
#include "tap.h"
#include "packet-ber.h"
#include "packet-ldap.h"
static int proto_ldap = -1;
static int proto_cldap = -1;
static int hf_ldap_response_to = -1;
static int hf_ldap_response_in = -1;
static int hf_ldap_time = -1;
static int hf_ldap_sasl_buffer_length = -1;
static int hf_ldap_length = -1;
static int hf_ldap_message_id = -1;
static int hf_ldap_message_type = -1;
static int hf_ldap_message_length = -1;
static int hf_ldap_message_result = -1;
static int hf_ldap_message_result_matcheddn = -1;
static int hf_ldap_message_result_errormsg = -1;
static int hf_ldap_message_result_referral = -1;
static int hf_ldap_message_bind_version = -1;
static int hf_ldap_message_bind_dn = -1;
static int hf_ldap_message_bind_auth = -1;
static int hf_ldap_message_bind_auth_password = -1;
static int hf_ldap_message_bind_auth_mechanism = -1;
static int hf_ldap_message_bind_auth_credentials = -1;
static int hf_ldap_message_bind_server_credentials = -1;
static int hf_ldap_message_search_base = -1;
static int hf_ldap_message_search_scope = -1;
static int hf_ldap_message_search_deref = -1;
static int hf_ldap_message_search_sizeLimit = -1;
static int hf_ldap_message_search_timeLimit = -1;
static int hf_ldap_message_search_typesOnly = -1;
static int hf_ldap_message_search_filter = -1;
static int hf_ldap_message_search_reference = -1;
static int hf_ldap_message_dn = -1;
static int hf_ldap_message_attribute = -1;
static int hf_ldap_message_value = -1;
static int hf_ldap_message_modrdn_name = -1;
static int hf_ldap_message_modrdn_delete = -1;
static int hf_ldap_message_modrdn_superior = -1;
static int hf_ldap_message_compare = -1;
static int hf_ldap_message_modify_add = -1;
static int hf_ldap_message_modify_replace = -1;
static int hf_ldap_message_modify_delete = -1;
static int hf_ldap_message_abandon_msgid = -1;
static int hf_mscldap_netlogon_type = -1;
static int hf_mscldap_netlogon_flags = -1;
static int hf_mscldap_netlogon_flags_pdc = -1;
static int hf_mscldap_netlogon_flags_gc = -1;
static int hf_mscldap_netlogon_flags_ldap = -1;
static int hf_mscldap_netlogon_flags_ds = -1;
static int hf_mscldap_netlogon_flags_kdc = -1;
static int hf_mscldap_netlogon_flags_timeserv = -1;
static int hf_mscldap_netlogon_flags_closest = -1;
static int hf_mscldap_netlogon_flags_writable = -1;
static int hf_mscldap_netlogon_flags_good_timeserv = -1;
static int hf_mscldap_netlogon_flags_ndnc = -1;
static int hf_mscldap_domain_guid = -1;
static int hf_mscldap_forest = -1;
static int hf_mscldap_domain = -1;
static int hf_mscldap_hostname = -1;
static int hf_mscldap_nb_domain = -1;
static int hf_mscldap_nb_hostname = -1;
static int hf_mscldap_username = -1;
static int hf_mscldap_sitename = -1;
static int hf_mscldap_clientsitename = -1;
static int hf_mscldap_netlogon_version = -1;
static int hf_mscldap_netlogon_lm_token = -1;
static int hf_mscldap_netlogon_nt_token = -1;
static gint ett_ldap = -1;
static gint ett_ldap_gssapi_token = -1;
static gint ett_ldap_referrals = -1;
static gint ett_ldap_attribute = -1;
static gint ett_mscldap_netlogon_flags = -1;
static int ldap_tap = -1;
/* 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;
} ldap_conv_info_t;
static GMemChunk *ldap_conv_info_chunk = NULL;
static guint ldap_conv_info_chunk_count = 20;
static ldap_conv_info_t *ldap_info_items;
static GMemChunk *ldap_call_response_chunk = NULL;
static guint ldap_call_response_chunk_count = 200;
static guint
ldap_info_hash_matched(gconstpointer k)
{
ldap_call_response_t *key = (ldap_call_response_t *)k;
return key->messageId;
}
static gint
ldap_info_equal_matched(gconstpointer k1, gconstpointer k2)
{
ldap_call_response_t *key1 = (ldap_call_response_t *)k1;
ldap_call_response_t *key2 = (ldap_call_response_t *)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)
{
ldap_call_response_t *key = (ldap_call_response_t *)k;
return key->messageId;
}
static gint
ldap_info_equal_unmatched(gconstpointer k1, gconstpointer k2)
{
ldap_call_response_t *key1 = (ldap_call_response_t *)k1;
ldap_call_response_t *key2 = (ldap_call_response_t *)k2;
return key1->messageId==key2->messageId;
}
static value_string msgTypes [] = {
{LDAP_REQ_BIND, "Bind Request"},
{LDAP_REQ_UNBIND, "Unbind Request"},
{LDAP_REQ_SEARCH, "Search Request"},
{LDAP_REQ_MODIFY, "Modify Request"},
{LDAP_REQ_ADD, "Add Request"},
{LDAP_REQ_DELETE, "Delete Request"},
{LDAP_REQ_MODRDN, "Modify RDN Request"},
{LDAP_REQ_COMPARE, "Compare Request"},
{LDAP_REQ_ABANDON, "Abandon Request"},
{LDAP_REQ_EXTENDED, "Extended Request"},
{LDAP_RES_BIND, "Bind Result"},
{LDAP_RES_SEARCH_ENTRY, "Search Entry"},
{LDAP_RES_SEARCH_RESULT, "Search Result"},
{LDAP_RES_SEARCH_REF, "Search Result Reference"},
{LDAP_RES_MODIFY, "Modify Result"},
{LDAP_RES_ADD, "Add Result"},
{LDAP_RES_DELETE, "Delete Result"},
{LDAP_RES_MODRDN, "Modify RDN Result"},
{LDAP_RES_COMPARE, "Compare Result"},
{LDAP_RES_EXTENDED, "Extended Response"},
{0, NULL},
};
static const value_string LDAPResultCode_vals[] = {
{ 0, "success" },
{ 1, "operationsError" },
{ 2, "protocolError" },
{ 3, "timeLimitExceeded" },
{ 4, "sizeLimitExceeded" },
{ 5, "compareFalse" },
{ 6, "compareTrue" },
{ 7, "authMethodNotSupported" },
{ 8, "strongAuthRequired" },
{ 10, "referral" },
{ 11, "adminLimitExceeded" },
{ 12, "unavailableCriticalExtension" },
{ 13, "confidentialityRequired" },
{ 14, "saslBindInProgress" },
{ 16, "noSuchAttribute" },
{ 17, "undefinedAttributeType" },
{ 18, "inappropriateMatching" },
{ 19, "constraintViolation" },
{ 20, "attributeOrValueExists" },
{ 21, "invalidAttributeSyntax" },
{ 32, "noSuchObject" },
{ 33, "aliasProblem" },
{ 34, "invalidDNSyntax" },
{ 36, "aliasDereferencingProblem" },
{ 48, "inappropriateAuthentication" },
{ 49, "invalidCredentials" },
{ 50, "insufficientAccessRights" },
{ 51, "busy" },
{ 52, "unavailable" },
{ 53, "unwillingToPerform" },
{ 54, "loopDetect" },
{ 64, "namingViolation" },
{ 65, "objectClassViolation" },
{ 66, "notAllowedOnNonLeaf" },
{ 67, "notAllowedOnRDN" },
{ 68, "entryAlreadyExists" },
{ 69, "objectClassModsProhibited" },
{ 71, "affectsMultipleDSAs" },
{ 80, "other" },
{ 0, NULL }
};
static int read_length(ASN1_SCK *a, proto_tree *tree, int hf_id, guint *len)
{
guint length = 0;
gboolean def = FALSE;
int start = a->offset;
int ret;
ret = asn1_length_decode(a, &def, &length);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Couldn't parse length: %s",
proto_registrar_get_name(hf_id), asn1_err_to_str(ret));
}
return ret;
}
if (len)
*len = length;
if (tree)
proto_tree_add_uint(tree, hf_id, a->tvb, start, a->offset-start, length);
return ASN1_ERR_NOERROR;
}
static int read_sequence(ASN1_SCK *a, guint *len)
{
guint cls, con, tag;
gboolean def;
guint length;
int ret;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &length);
if (ret != ASN1_ERR_NOERROR)
return ret;
if (cls != ASN1_UNI || con != ASN1_CON || tag != ASN1_SEQ)
return ASN1_ERR_WRONG_TYPE;
if (len)
*len = length;
return ASN1_ERR_NOERROR;
}
static int read_set(ASN1_SCK *a, guint *len)
{
guint cls, con, tag;
gboolean def;
guint length;
int ret;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &length);
if (ret != ASN1_ERR_NOERROR)
return ret;
if (cls != ASN1_UNI || con != ASN1_CON || tag != ASN1_SET)
return ASN1_ERR_WRONG_TYPE;
if (len)
*len = length;
return ASN1_ERR_NOERROR;
}
static int read_integer_value(ASN1_SCK *a, proto_tree *tree, int hf_id,
proto_item **new_item, guint *i, int start, guint length)
{
guint integer = 0;
proto_item *temp_item = NULL;
int ret;
ret = asn1_uint32_value_decode(a, length, &integer);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Couldn't parse value: %s",
proto_registrar_get_name(hf_id), asn1_err_to_str(ret));
}
return ret;
}
if (i)
*i = integer;
if (tree)
temp_item = proto_tree_add_uint(tree, hf_id, a->tvb, start, a->offset-start, integer);
if (new_item)
*new_item = temp_item;
return ASN1_ERR_NOERROR;
}
static int read_integer(ASN1_SCK *a, proto_tree *tree, int hf_id,
proto_item **new_item, guint *i, guint expected_tag)
{
guint cls, con, tag;
gboolean def;
guint length;
int start = a->offset;
int ret;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &length);
if (ret == ASN1_ERR_NOERROR) {
if (cls != ASN1_UNI || con != ASN1_PRI || tag != expected_tag)
ret = ASN1_ERR_WRONG_TYPE;
}
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Couldn't parse header: %s",
(hf_id != -1) ? proto_registrar_get_name(hf_id) : "LDAP message",
asn1_err_to_str(ret));
}
return ret;
}
return read_integer_value(a, tree, hf_id, new_item, i, start, length);
}
static int read_boolean_value(ASN1_SCK *a, proto_tree *tree, int hf_id,
proto_item **new_item, guint *i, int start, guint length)
{
guint integer = 0;
proto_item *temp_item = NULL;
int ret;
ret = asn1_uint32_value_decode(a, length, &integer);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Couldn't parse value: %s",
proto_registrar_get_name(hf_id), asn1_err_to_str(ret));
}
return ret;
}
if (i)
*i = integer;
if (tree)
temp_item = proto_tree_add_boolean(tree, hf_id, a->tvb, start, a->offset-start, integer);
if (new_item)
*new_item = temp_item;
return ASN1_ERR_NOERROR;
}
static int read_boolean(ASN1_SCK *a, proto_tree *tree, int hf_id,
proto_item **new_item, guint *i)
{
guint cls, con, tag;
gboolean def;
guint length;
int start = a->offset;
int ret;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &length);
if (ret == ASN1_ERR_NOERROR) {
if (cls != ASN1_UNI || con != ASN1_PRI || tag != ASN1_BOL)
ret = ASN1_ERR_WRONG_TYPE;
}
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Couldn't parse header: %s",
proto_registrar_get_name(hf_id), asn1_err_to_str(ret));
}
return ret;
}
return read_boolean_value(a, tree, hf_id, new_item, i, start, length);
}
static int read_string_value(ASN1_SCK *a, proto_tree *tree, int hf_id,
proto_item **new_item, char **s, int start, guint length)
{
guchar *string;
proto_item *temp_item = NULL;
int ret;
if (length)
{
ret = asn1_string_value_decode(a, length, &string);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Couldn't parse value: %s",
proto_registrar_get_name(hf_id), asn1_err_to_str(ret));
}
return ret;
}
string = g_realloc(string, length + 1);
string[length] = '\0';
}
else
string = "(null)";
if (tree)
temp_item = proto_tree_add_string(tree, hf_id, a->tvb, start, a->offset - start, string);
if (new_item)
*new_item = temp_item;
if (s && length)
*s = string;
else if (length)
g_free(string);
return ASN1_ERR_NOERROR;
}
static int read_string(ASN1_SCK *a, proto_tree *tree, int hf_id,
proto_item **new_item, char **s, guint *length,
guint expected_cls, guint expected_tag)
{
guint cls, con, tag;
gboolean def;
guint tmplen;
int start = a->offset;
int ret;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &tmplen);
if (ret == ASN1_ERR_NOERROR) {
if (cls != expected_cls || con != ASN1_PRI || tag != expected_tag)
ret = ASN1_ERR_WRONG_TYPE;
}
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Couldn't parse header: %s",
proto_registrar_get_name(hf_id), asn1_err_to_str(ret));
}
return ret;
}
if(length){
*length=tmplen;
}
return read_string_value(a, tree, hf_id, new_item, s, start, tmplen);
}
static int read_bytestring_value(ASN1_SCK *a, proto_tree *tree, int hf_id,
proto_item **new_item, char **s, int start, guint length)
{
guchar *string;
proto_item *temp_item = NULL;
int ret;
if (length)
{
ret = asn1_string_value_decode(a, length, &string);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Couldn't parse value: %s",
proto_registrar_get_name(hf_id), asn1_err_to_str(ret));
}
return ret;
}
string = g_realloc(string, length + 1);
string[length] = '\0';
}
else
string = "(null)";
if (tree)
temp_item = proto_tree_add_bytes(tree, hf_id, a->tvb, start, a->offset - start, string);
if (new_item)
*new_item = temp_item;
if (s && length)
*s = string;
else if (length)
g_free(string);
return ASN1_ERR_NOERROR;
}
static int read_bytestring(ASN1_SCK *a, proto_tree *tree, int hf_id,
proto_item **new_item, char **s, guint expected_cls, guint expected_tag)
{
guint cls, con, tag;
gboolean def;
guint length;
int start = a->offset;
int ret;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &length);
if (ret == ASN1_ERR_NOERROR) {
if (cls != expected_cls || con != ASN1_PRI || tag != expected_tag)
ret = ASN1_ERR_WRONG_TYPE;
}
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Couldn't parse header: %s",
proto_registrar_get_name(hf_id), asn1_err_to_str(ret));
}
return ret;
}
return read_bytestring_value(a, tree, hf_id, new_item, s, start, length);
}
static int parse_filter_strings(ASN1_SCK *a, char **filter, guint *filter_length, const guchar *operation)
{
guchar *string;
guchar *string2;
guint string_length;
guint string2_length;
guint string_bytes;
char *filterp;
int ret;
ret = asn1_octet_string_decode(a, &string, &string_length, &string_bytes);
if (ret != ASN1_ERR_NOERROR)
return ret;
ret = asn1_octet_string_decode(a, &string2, &string2_length, &string_bytes);
if (ret != ASN1_ERR_NOERROR)
return ret;
*filter_length += 2 + strlen(operation) + string_length + string2_length;
*filter = g_realloc(*filter, *filter_length);
filterp = *filter + strlen(*filter);
*filterp++ = '(';
if (string_length != 0) {
memcpy(filterp, string, string_length);
filterp += string_length;
}
strcpy(filterp, operation);
filterp += strlen(operation);
if (string2_length != 0) {
memcpy(filterp, string2, string2_length);
filterp += string2_length;
}
*filterp++ = ')';
*filterp = '\0';
g_free(string);
g_free(string2);
return ASN1_ERR_NOERROR;
}
/* Richard Dawe: To parse substring filters, I added this function. */
static int parse_filter_substrings(ASN1_SCK *a, char **filter, guint *filter_length)
{
int end;
guchar *string;
char *filterp;
guint string_length;
guint string_bytes;
guint seq_len;
guint header_bytes;
int ret, any_valued;
/* For ASN.1 parsing of octet strings */
guint cls;
guint con;
guint tag;
gboolean def;
ret = asn1_octet_string_decode(a, &string, &string_length, &string_bytes);
if (ret != ASN1_ERR_NOERROR)
return ret;
ret = asn1_sequence_decode(a, &seq_len, &header_bytes);
if (ret != ASN1_ERR_NOERROR)
return ret;
*filter_length += 2 + 1 + string_length;
*filter = g_realloc(*filter, *filter_length);
filterp = *filter + strlen(*filter);
*filterp++ = '(';
if (string_length != 0) {
memcpy(filterp, string, string_length);
filterp += string_length;
}
*filterp++ = '=';
*filterp = '\0';
g_free(string);
/* Now decode seq_len's worth of octet strings. */
any_valued = 0;
end = a->offset + seq_len;
while (a->offset < end) {
/* Octet strings here are context-specific, which
* asn1_octet_string_decode() barfs on. Emulate it, but don't barf. */
ret = asn1_header_decode (a, &cls, &con, &tag, &def, &string_length);
if (ret != ASN1_ERR_NOERROR)
return ret;
/* XXX - check the tag? */
if (cls != ASN1_CTX || con != ASN1_PRI) {
/* XXX - handle the constructed encoding? */
return ASN1_ERR_WRONG_TYPE;
}
if (!def)
return ASN1_ERR_LENGTH_NOT_DEFINITE;
ret = asn1_string_value_decode(a, (int) string_length, &string);
if (ret != ASN1_ERR_NOERROR)
return ret;
/* If we have an 'any' component with a string value, we need to append
* an extra asterisk before final component. */
if ((tag == 1) && (string_length != 0))
any_valued = 1;
if ( (tag == 1) || ((tag == 2) && any_valued) )
(*filter_length)++;
*filter_length += string_length;
*filter = g_realloc(*filter, *filter_length);
filterp = *filter + strlen(*filter);
if ( (tag == 1) || ((tag == 2) && any_valued) )
*filterp++ = '*';
if (tag == 2)
any_valued = 0;
if (string_length != 0) {
memcpy(filterp, string, string_length);
filterp += string_length;
}
*filterp = '\0';
g_free(string);
}
if (any_valued)
{
(*filter_length)++;
*filter = g_realloc(*filter, *filter_length);
filterp = *filter + strlen(*filter);
*filterp++ = '*';
}
/* NB: Allocated byte for this earlier */
*filterp++ = ')';
*filterp = '\0';
return ASN1_ERR_NOERROR;
}
/* Returns -1 if we're at the end, returns an ASN1_ERR value otherwise. */
static int parse_filter(ASN1_SCK *a, char **filter, guint *filter_length,
int *end)
{
guint cls, con, tag;
guint length;
gboolean def;
int ret;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &length);
if (ret != ASN1_ERR_NOERROR)
return ret;
if (*end == 0)
{
*end = a->offset + length;
*filter_length = 1;
*filter = g_malloc0(*filter_length);
}
if (cls == ASN1_CTX) /* XXX - handle other types as errors? */
{
switch (tag)
{
case LDAP_FILTER_AND:
{
int add_end;
if (con != ASN1_CON)
return ASN1_ERR_WRONG_TYPE;
add_end = a->offset + length;
*filter_length += 3;
*filter = g_realloc(*filter, *filter_length);
strcat(*filter, "(&");
while ((ret = parse_filter(a, filter, filter_length, &add_end))
== ASN1_ERR_NOERROR)
continue;
if (ret != -1)
return ret;
strcat(*filter, ")");
}
break;
case LDAP_FILTER_OR:
{
int or_end;
if (con != ASN1_CON)
return ASN1_ERR_WRONG_TYPE;
or_end = a->offset + length;
*filter_length += 3;
*filter = g_realloc(*filter, *filter_length);
strcat(*filter, "(|");
while ((ret = parse_filter(a, filter, filter_length, &or_end))
== ASN1_ERR_NOERROR)
continue;
if (ret != -1)
return ret;
strcat(*filter, ")");
}
break;
case LDAP_FILTER_NOT:
{
int not_end;
if (con != ASN1_CON)
return ASN1_ERR_WRONG_TYPE;
not_end = a->offset + length;
*filter_length += 3;
*filter = g_realloc(*filter, *filter_length);
strcat(*filter, "(!");
ret = parse_filter(a, filter, filter_length, &not_end);
if (ret != -1 && ret != ASN1_ERR_NOERROR)
return ret;
strcat(*filter, ")");
}
break;
case LDAP_FILTER_EQUALITY:
if (con != ASN1_CON)
return ASN1_ERR_WRONG_TYPE;
ret = parse_filter_strings(a, filter, filter_length, "=");
if (ret != ASN1_ERR_NOERROR)
return ret;
break;
case LDAP_FILTER_GE:
if (con != ASN1_CON)
return ASN1_ERR_WRONG_TYPE;
ret = parse_filter_strings(a, filter, filter_length, ">=");
if (ret != ASN1_ERR_NOERROR)
return ret;
break;
case LDAP_FILTER_LE:
if (con != ASN1_CON)
return ASN1_ERR_WRONG_TYPE;
ret = parse_filter_strings(a, filter, filter_length, "<=");
if (ret != -1 && ret != ASN1_ERR_NOERROR)
return ret;
break;
case LDAP_FILTER_APPROX:
if (con != ASN1_CON)
return ASN1_ERR_WRONG_TYPE;
ret = parse_filter_strings(a, filter, filter_length, "~=");
if (ret != ASN1_ERR_NOERROR)
return ret;
break;
case LDAP_FILTER_PRESENT:
{
guchar *string;
char *filterp;
if (con != ASN1_PRI)
return ASN1_ERR_WRONG_TYPE;
ret = asn1_string_value_decode(a, length, &string);
if (ret != ASN1_ERR_NOERROR)
return ret;
*filter_length += 4 + length;
*filter = g_realloc(*filter, *filter_length);
filterp = *filter + strlen(*filter);
*filterp++ = '(';
if (length != 0) {
memcpy(filterp, string, length);
filterp += length;
}
*filterp++ = '=';
*filterp++ = '*';
*filterp++ = ')';
*filterp = '\0';
g_free(string);
}
break;
case LDAP_FILTER_SUBSTRINGS:
if (con != ASN1_CON)
return ASN1_ERR_WRONG_TYPE;
/* Richard Dawe: Handle substrings */
ret = parse_filter_substrings(a, filter, filter_length);
if (ret != ASN1_ERR_NOERROR)
return ret;
break;
default:
return ASN1_ERR_WRONG_TYPE;
}
}
if (a->offset == *end)
return -1;
else
return ASN1_ERR_NOERROR;
}
static gboolean read_filter(ASN1_SCK *a, proto_tree *tree, int hf_id)
{
int start = a->offset;
char *filter = 0;
guint filter_length = 0;
int end = 0;
int ret;
while ((ret = parse_filter(a, &filter, &filter_length, &end))
== ASN1_ERR_NOERROR)
continue;
if (tree) {
if (ret != -1) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Can't parse filter: %s",
proto_registrar_get_name(hf_id), asn1_err_to_str(ret));
} else
proto_tree_add_string(tree, hf_id, a->tvb, start, a->offset-start, filter);
}
g_free(filter);
return (ret == -1) ? TRUE : FALSE;
}
/********************************************************************************************/
static void dissect_ldap_result(ASN1_SCK *a, proto_tree *tree, packet_info *pinfo)
{
guint resultCode = 0;
int ret;
if (read_integer(a, tree, hf_ldap_message_result, 0, &resultCode, ASN1_ENUM) != ASN1_ERR_NOERROR)
return;
if (resultCode != 0) {
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", %s",
val_to_str(resultCode, LDAPResultCode_vals,
"Unknown (%u)"));
}
if (read_string(a, tree, hf_ldap_message_result_matcheddn, 0, 0, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
if (read_string(a, tree, hf_ldap_message_result_errormsg, 0, 0, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
if (resultCode == 10) /* Referral */
{
int start = a->offset;
int end;
guint length;
proto_item *ti;
proto_tree *referralTree;
ret = read_sequence(a, &length);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"ERROR: Couldn't parse referral URL sequence header: %s",
asn1_err_to_str(ret));
}
return;
}
ti = proto_tree_add_text(tree, a->tvb, start, length, "Referral URLs");
referralTree = proto_item_add_subtree(ti, ett_ldap_referrals);
end = a->offset + length;
while (a->offset < end) {
if (read_string(a, referralTree, hf_ldap_message_result_referral, 0, 0, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
}
}
}
static void dissect_ldap_request_bind(ASN1_SCK *a, proto_tree *tree,
tvbuff_t *tvb, packet_info *pinfo, ldap_conv_info_t *ldap_info)
{
guint cls, con, tag;
gboolean def;
guint length;
int start;
int end;
int ret;
char *mechanism, *s = NULL;
int token_offset;
gint available_length, reported_length;
tvbuff_t *new_tvb;
proto_item *gitem;
proto_tree *gtree = NULL;
if (read_integer(a, tree, hf_ldap_message_bind_version, 0, 0, ASN1_INT) != ASN1_ERR_NOERROR)
return;
if (read_string(a, tree, hf_ldap_message_bind_dn, 0, &s, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", DN=%s", s != NULL ? s : "(null)");
g_free(s);
start = a->offset;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &length);
if (ret == ASN1_ERR_NOERROR) {
if (cls != ASN1_CTX) {
/* RFCs 1777 and 2251 say these are context-specific types */
ret = ASN1_ERR_WRONG_TYPE;
}
}
if (ret != ASN1_ERR_NOERROR) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Couldn't parse header: %s",
proto_registrar_get_name(hf_ldap_message_bind_auth),
asn1_err_to_str(ret));
return;
}
proto_tree_add_uint(tree, hf_ldap_message_bind_auth, a->tvb, start,
a->offset - start, tag);
end = a->offset + length;
switch (tag)
{
case LDAP_AUTH_SIMPLE:
if (read_string_value(a, tree, hf_ldap_message_bind_auth_password, NULL,
NULL, start, length) != ASN1_ERR_NOERROR)
return;
break;
/* For Kerberos V4, dissect it as a ticket. */
case LDAP_AUTH_SASL:
mechanism = NULL;
if (read_string(a, tree, hf_ldap_message_bind_auth_mechanism, NULL,
&mechanism, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
/*
* We need to remember the authentication type and mechanism for this
* conversation.
*
* XXX - actually, we might need to remember more than one
* type and mechanism, if you can unbind and rebind with a
* different type and/or mechanism.
*/
ldap_info->auth_type = tag;
ldap_info->auth_mech = mechanism;
ldap_info->first_auth_frame = 0; /* not known until we see the bind reply */
/*
* If the mechanism in this request is an empty string (which is
* returned as a null pointer), use the saved mechanism instead.
* Otherwise, if the saved mechanism is an empty string (null),
* save this mechanism.
*/
if (mechanism == NULL)
mechanism = ldap_info->auth_mech;
else {
if (ldap_info->auth_mech == NULL) {
g_free(ldap_info->auth_mech);
}
ldap_info->auth_mech = mechanism;
}
if (a->offset < end) {
if (mechanism != NULL && strcmp(mechanism, "GSS-SPNEGO") == 0) {
/*
* This is a GSS-API token ancapsulated within GSS-SPNEGO.
* Find out how big it is by parsing the ASN.1 header for the
* OCTET STREAM that contains it.
*/
token_offset = a->offset;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &length);
if (ret != ASN1_ERR_NOERROR) {
proto_tree_add_text(tree, a->tvb, token_offset, 0,
"%s: ERROR: Couldn't parse header: %s",
proto_registrar_get_name(hf_ldap_message_bind_auth_credentials),
asn1_err_to_str(ret));
return;
}
if (tree) {
gitem = proto_tree_add_text(tree, tvb, token_offset,
(a->offset + length) - token_offset, "GSS-API Token");
gtree = proto_item_add_subtree(gitem, ett_ldap_gssapi_token);
}
available_length = tvb_length_remaining(tvb, token_offset);
reported_length = tvb_reported_length_remaining(tvb, token_offset);
g_assert(available_length >= 0);
g_assert(reported_length >= 0);
if (available_length > reported_length)
available_length = reported_length;
if ((guint)available_length > length)
available_length = length;
if ((guint)reported_length > length)
reported_length = length;
new_tvb = tvb_new_subset(tvb, a->offset, available_length, reported_length);
call_dissector(gssapi_handle, new_tvb, pinfo, gtree);
a->offset += length;
} else if (mechanism != NULL && strcmp(mechanism, "GSSAPI") == 0) {
/*
* This is a raw GSS-API token.
* Find out how big it is by parsing the ASN.1 header for the
* OCTET STREAM that contains it.
*/
token_offset = a->offset;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &length);
if (ret != ASN1_ERR_NOERROR) {
proto_tree_add_text(tree, a->tvb, token_offset, 0,
"%s: ERROR: Couldn't parse header: %s",
proto_registrar_get_name(hf_ldap_message_bind_auth_credentials),
asn1_err_to_str(ret));
return;
}
if (tree) {
gitem = proto_tree_add_text(tree, tvb, token_offset,
(a->offset + length) - token_offset, "GSS-API Token");
gtree = proto_item_add_subtree(gitem, ett_ldap_gssapi_token);
}
if(length==0){
/* for GSSAPI the third pdu will sometimes be "empty" */
return;
}
available_length = tvb_length_remaining(tvb, token_offset);
reported_length = tvb_reported_length_remaining(tvb, token_offset);
g_assert(available_length >= 0);
g_assert(reported_length >= 0);
if (available_length > reported_length)
available_length = reported_length;
if ((guint)available_length > length)
available_length = length;
if ((guint)reported_length > length)
reported_length = length;
new_tvb = tvb_new_subset(tvb, a->offset, available_length, reported_length);
call_dissector(gssapi_handle, new_tvb, pinfo, gtree);
a->offset += length;
} else {
if (read_bytestring(a, tree, hf_ldap_message_bind_auth_credentials,
NULL, NULL, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
}
}
break;
}
}
static void dissect_ldap_response_bind(ASN1_SCK *a, proto_tree *tree,
int start, guint length, tvbuff_t *tvb, packet_info *pinfo, ldap_conv_info_t *ldap_info)
{
guint cls, con, tag;
gboolean def;
guint cred_length;
int end;
int ret;
int token_offset;
gint available_length, reported_length;
tvbuff_t *new_tvb;
proto_item *gitem;
proto_tree *gtree = NULL;
end = start + length;
dissect_ldap_result(a, tree, pinfo);
if (a->offset < end) {
switch (ldap_info->auth_type) {
/* For Kerberos V4, dissect it as a ticket. */
/* XXX - what about LDAP_AUTH_SIMPLE? */
case LDAP_AUTH_SASL:
/*
* All frames after this are assumed to use a security layer.
*
* XXX - won't work if there's another reply, with the security
* layer, starting in the same TCP segment that ends this
* reply, but as LDAP is a request/response protocol, and
* as the client probably can't start using authentication until
* it gets the bind reply and the server won't send a reply until
* it gets a request, that probably won't happen.
*
* XXX - that assumption is invalid; it's not clear where the
* hell you find out whether there's any security layer. In
* one capture, we have two GSS-SPNEGO negotiations, both of
* which select MS KRB5, and the only differences in the tokens
* is in the RC4-HMAC ciphertext. The various
* draft-ietf--cat-sasl-gssapi-NN.txt drafts seem to imply
* that the RFC 2222 spoo with the bitmask and maximum
* output message size stuff is done - but where does that
* stuff show up? Is it in the ciphertext, which means it's
* presumably encrypted?
*
* Grrr. We have to do a gross heuristic, checking whether the
* putative LDAP message begins with 0x00 or not, making the
* assumption that we won't have more than 2^24 bytes of
* encapsulated stuff.
*/
ldap_info->first_auth_frame = pinfo->fd->num + 1;
if (ldap_info->auth_mech != NULL &&
strcmp(ldap_info->auth_mech, "GSS-SPNEGO") == 0) {
/*
* This is a GSS-API token.
* Find out how big it is by parsing the ASN.1 header for the
* OCTET STREAM that contains it.
*/
token_offset = a->offset;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &cred_length);
if (ret != ASN1_ERR_NOERROR) {
proto_tree_add_text(tree, a->tvb, token_offset, 0,
"%s: ERROR: Couldn't parse header: %s",
proto_registrar_get_name(hf_ldap_message_bind_auth_credentials),
asn1_err_to_str(ret));
return;
}
if (tree) {
gitem = proto_tree_add_text(tree, tvb, token_offset,
(a->offset + cred_length) - token_offset, "GSS-API Token");
gtree = proto_item_add_subtree(gitem, ett_ldap_gssapi_token);
}
available_length = tvb_length_remaining(tvb, token_offset);
reported_length = tvb_reported_length_remaining(tvb, token_offset);
g_assert(available_length >= 0);
g_assert(reported_length >= 0);
if (available_length > reported_length)
available_length = reported_length;
if ((guint)available_length > cred_length)
available_length = cred_length;
if ((guint)reported_length > cred_length)
reported_length = cred_length;
new_tvb = tvb_new_subset(tvb, a->offset, available_length, reported_length);
call_dissector(gssapi_handle, new_tvb, pinfo, gtree);
a->offset += cred_length;
} else if (ldap_info->auth_mech != NULL &&
strcmp(ldap_info->auth_mech, "GSSAPI") == 0) {
/*
* This is a GSS-API token.
* Find out how big it is by parsing the ASN.1 header for the
* OCTET STREAM that contains it.
*/
token_offset = a->offset;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &cred_length);
if (ret != ASN1_ERR_NOERROR) {
proto_tree_add_text(tree, a->tvb, token_offset, 0,
"%s: ERROR: Couldn't parse header: %s",
proto_registrar_get_name(hf_ldap_message_bind_auth_credentials),
asn1_err_to_str(ret));
return;
}
if (tree) {
gitem = proto_tree_add_text(tree, tvb, token_offset,
(a->offset + cred_length) - token_offset, "GSS-API Token");
gtree = proto_item_add_subtree(gitem, ett_ldap_gssapi_token);
}
available_length = tvb_length_remaining(tvb, token_offset);
reported_length = tvb_reported_length_remaining(tvb, token_offset);
g_assert(available_length >= 0);
g_assert(reported_length >= 0);
if (available_length > reported_length)
available_length = reported_length;
if ((guint)available_length > cred_length)
available_length = cred_length;
if ((guint)reported_length > cred_length)
reported_length = cred_length;
new_tvb = tvb_new_subset(tvb, a->offset, available_length, reported_length);
call_dissector(gssapi_handle, new_tvb, pinfo, gtree);
a->offset += cred_length;
} else {
if (read_bytestring(a, tree, hf_ldap_message_bind_server_credentials,
NULL, NULL, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
}
break;
default:
if (read_bytestring(a, tree, hf_ldap_message_bind_server_credentials,
NULL, NULL, ASN1_CTX, 7) != ASN1_ERR_NOERROR)
return;
break;
}
}
}
static void dissect_ldap_request_search(ASN1_SCK *a, proto_tree *tree, packet_info *pinfo)
{
guint seq_length;
int end;
int ret;
char *s = NULL;
if (read_string(a, tree, hf_ldap_message_search_base, 0, &s, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", Base DN=%s", s != NULL ? s : "(null)");
g_free(s);
if (read_integer(a, tree, hf_ldap_message_search_scope, 0, 0, ASN1_ENUM) != ASN1_ERR_NOERROR)
return;
if (read_integer(a, tree, hf_ldap_message_search_deref, 0, 0, ASN1_ENUM) != ASN1_ERR_NOERROR)
return;
if (read_integer(a, tree, hf_ldap_message_search_sizeLimit, 0, 0, ASN1_INT) != ASN1_ERR_NOERROR)
return;
if (read_integer(a, tree, hf_ldap_message_search_timeLimit, 0, 0, ASN1_INT) != ASN1_ERR_NOERROR)
return;
if (read_boolean(a, tree, hf_ldap_message_search_typesOnly, 0, 0) != ASN1_ERR_NOERROR)
return;
if (!read_filter(a, tree, hf_ldap_message_search_filter))
return;
ret = read_sequence(a, &seq_length);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse LDAP attribute sequence header: %s",
asn1_err_to_str(ret));
}
return;
}
end = a->offset + seq_length;
while (a->offset < end) {
if (read_string(a, tree, hf_ldap_message_attribute, 0, 0, 0, ASN1_UNI,
ASN1_OTS) != ASN1_ERR_NOERROR)
return;
}
}
static int dissect_mscldap_string(tvbuff_t *tvb, int offset, char *str, int maxlen, gboolean prepend_dot)
{
guint8 len;
len=tvb_get_guint8(tvb, offset);
offset+=1;
*str=0;
while(len){
/* add potential field separation dot */
if(prepend_dot){
if(!maxlen){
*str=0;
return offset;
}
maxlen--;
*str++='.';
*str=0;
}
if(len==0xc0){
int new_offset;
/* ops its a mscldap compressed string */
new_offset=tvb_get_guint8(tvb, offset);
offset+=1;
dissect_mscldap_string(tvb, new_offset, str, maxlen, FALSE);
return offset;
}
prepend_dot=TRUE;
if(maxlen<=len){
if(maxlen>3){
*str++='.';
*str++='.';
*str++='.';
}
*str=0;
return offset; /* will mess up offset in caller, is unlikely */
}
tvb_memcpy(tvb, str, offset, len);
str+=len;
*str=0;
maxlen-=len;
offset+=len;
len=tvb_get_guint8(tvb, offset);
offset+=1;
}
*str=0;
return offset;
}
/* These flag bits were found to be defined in the samba sources.
* I hope they are correct (but have serious doubts about the CLOSEST
* bit being used or being meaningful).
*/
static const true_false_string tfs_ads_pdc = {
"This is a PDC",
"This is NOT a pdc"
};
static const true_false_string tfs_ads_gc = {
"This is a GLOBAL CATALOGUE of forest",
"This is NOT a global catalog of forest"
};
static const true_false_string tfs_ads_ldap = {
"This is an LDAP server",
"This is NOT an ldap server"
};
static const true_false_string tfs_ads_ds = {
"This dc supports DS",
"This dc does NOT support ds"
};
static const true_false_string tfs_ads_kdc = {
"This is a KDC (kerberos)",
"This is NOT a kdc (kerberos)"
};
static const true_false_string tfs_ads_timeserv = {
"This dc is running TIME SERVICES (ntp)",
"This dc is NOT running time services (ntp)"
};
static const true_false_string tfs_ads_closest = {
"This is the CLOSEST dc (unreliable?)",
"This is NOT the closest dc"
};
static const true_false_string tfs_ads_writable = {
"This dc is WRITABLE",
"This dc is NOT writable"
};
static const true_false_string tfs_ads_good_timeserv = {
"This dc has a GOOD TIME SERVICE (i.e. hardware clock)",
"This dc does NOT have a good time service (i.e. no hardware clock)"
};
static const true_false_string tfs_ads_ndnc = {
"Domain is NON-DOMAIN NC serviced by ldap server",
"Domain is NOT non-domain nc serviced by ldap server"
};
static int dissect_mscldap_netlogon_flags(proto_tree *parent_tree, tvbuff_t *tvb, int offset)
{
guint32 flags;
proto_item *item;
proto_tree *tree=NULL;
flags=tvb_get_letohl(tvb, offset);
item=proto_tree_add_item(parent_tree, hf_mscldap_netlogon_flags, tvb, offset, 4, TRUE);
if(parent_tree){
tree = proto_item_add_subtree(item, ett_mscldap_netlogon_flags);
}
proto_tree_add_boolean(tree, hf_mscldap_netlogon_flags_ndnc,
tvb, offset, 4, flags);
proto_tree_add_boolean(tree, hf_mscldap_netlogon_flags_good_timeserv,
tvb, offset, 4, flags);
proto_tree_add_boolean(tree, hf_mscldap_netlogon_flags_writable,
tvb, offset, 4, flags);
proto_tree_add_boolean(tree, hf_mscldap_netlogon_flags_closest,
tvb, offset, 4, flags);
proto_tree_add_boolean(tree, hf_mscldap_netlogon_flags_timeserv,
tvb, offset, 4, flags);
proto_tree_add_boolean(tree, hf_mscldap_netlogon_flags_kdc,
tvb, offset, 4, flags);
proto_tree_add_boolean(tree, hf_mscldap_netlogon_flags_ds,
tvb, offset, 4, flags);
proto_tree_add_boolean(tree, hf_mscldap_netlogon_flags_ldap,
tvb, offset, 4, flags);
proto_tree_add_boolean(tree, hf_mscldap_netlogon_flags_gc,
tvb, offset, 4, flags);
proto_tree_add_boolean(tree, hf_mscldap_netlogon_flags_pdc,
tvb, offset, 4, flags);
offset += 4;
return offset;
}
static void dissect_mscldap_response_netlogon(proto_tree *tree, tvbuff_t *tvb)
{
int old_offset, offset=0;
char str[256];
/*qqq*/
/* Type */
/*XXX someone that knows what the type means should add that knowledge here*/
proto_tree_add_item(tree, hf_mscldap_netlogon_type, tvb, offset, 4, TRUE);
offset += 4;
/* Flags */
offset = dissect_mscldap_netlogon_flags(tree, tvb, offset);
/* Domain GUID */
proto_tree_add_item(tree, hf_mscldap_domain_guid, tvb, offset, 16, TRUE);
offset += 16;
/* Forest */
old_offset=offset;
offset=dissect_mscldap_string(tvb, offset, str, 255, FALSE);
proto_tree_add_string(tree, hf_mscldap_forest, tvb, old_offset, offset-old_offset, str);
/* Domain */
old_offset=offset;
offset=dissect_mscldap_string(tvb, offset, str, 255, FALSE);
proto_tree_add_string(tree, hf_mscldap_domain, tvb, old_offset, offset-old_offset, str);
/* Hostname */
old_offset=offset;
offset=dissect_mscldap_string(tvb, offset, str, 255, FALSE);
proto_tree_add_string(tree, hf_mscldap_hostname, tvb, old_offset, offset-old_offset, str);
/* NetBios Domain */
old_offset=offset;
offset=dissect_mscldap_string(tvb, offset, str, 255, FALSE);
proto_tree_add_string(tree, hf_mscldap_nb_domain, tvb, old_offset, offset-old_offset, str);
/* NetBios Hostname */
old_offset=offset;
offset=dissect_mscldap_string(tvb, offset, str, 255, FALSE);
proto_tree_add_string(tree, hf_mscldap_nb_hostname, tvb, old_offset, offset-old_offset, str);
/* User */
old_offset=offset;
offset=dissect_mscldap_string(tvb, offset, str, 255, FALSE);
proto_tree_add_string(tree, hf_mscldap_username, tvb, old_offset, offset-old_offset, str);
/* Site */
old_offset=offset;
offset=dissect_mscldap_string(tvb, offset, str, 255, FALSE);
proto_tree_add_string(tree, hf_mscldap_sitename, tvb, old_offset, offset-old_offset, str);
/* Client Site */
old_offset=offset;
offset=dissect_mscldap_string(tvb, offset, str, 255, FALSE);
proto_tree_add_string(tree, hf_mscldap_clientsitename, tvb, old_offset, offset-old_offset, str);
/* Version */
proto_tree_add_item(tree, hf_mscldap_netlogon_version, tvb, offset, 4, TRUE);
offset += 4;
/* LM Token */
proto_tree_add_item(tree, hf_mscldap_netlogon_lm_token, tvb, offset, 2, TRUE);
offset += 2;
/* NT Token */
proto_tree_add_item(tree, hf_mscldap_netlogon_nt_token, tvb, offset, 2, TRUE);
offset += 2;
}
static void dissect_mscldap_response(proto_tree *tree, tvbuff_t *tvb, guint32 rpc)
{
switch(rpc){
case MSCLDAP_RPC_NETLOGON:
dissect_mscldap_response_netlogon(tree, tvb);
break;
default:
proto_tree_add_text(tree, tvb, 0, tvb_length(tvb),
"ERROR: Unknown type of MS-CLDAP RPC call");
}
}
static void dissect_ldap_response_search_entry(ASN1_SCK *a, proto_tree *tree,
gboolean is_mscldap)
{
guint seq_length;
int end_of_sequence;
int ret;
char *str=NULL;
guint32 len;
guint32 mscldap_rpc;
if (read_string(a, tree, hf_ldap_message_dn, 0, 0, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
ret = read_sequence(a, &seq_length);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse search entry response sequence header: %s",
asn1_err_to_str(ret));
}
return;
}
end_of_sequence = a->offset + seq_length;
while (a->offset < end_of_sequence)
{
proto_item *ti;
proto_tree *attr_tree;
guint set_length;
int end_of_set;
ret = read_sequence(a, 0);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse LDAP attribute sequence header: %s",
asn1_err_to_str(ret));
}
return;
}
if (read_string(a, tree, hf_ldap_message_attribute, &ti, &str, &len, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
mscldap_rpc=0;
if(is_mscldap){
if(!strncmp(str, "netlogon", 8)){
mscldap_rpc=MSCLDAP_RPC_NETLOGON;
}
}
g_free(str);
str=NULL;
attr_tree = proto_item_add_subtree(ti, ett_ldap_attribute);
ret = read_set(a, &set_length);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(attr_tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse LDAP value set header: %s",
asn1_err_to_str(ret));
}
return;
}
end_of_set = a->offset + set_length;
while (a->offset < end_of_set) {
if(!is_mscldap){
if (read_string(a, attr_tree, hf_ldap_message_value, 0, 0, 0, ASN1_UNI,
ASN1_OTS) != ASN1_ERR_NOERROR){
return;
}
} else {
guint cls, con, tag;
gboolean def;
guint len;
int start = a->offset;
int ret;
tvbuff_t *mscldap_tvb=NULL;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &len);
if (ret == ASN1_ERR_NOERROR) {
if (cls != ASN1_UNI || con != ASN1_PRI || tag != ASN1_OTS)
ret = ASN1_ERR_WRONG_TYPE;
}
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Couldn't parse header: %s",
proto_registrar_get_name(hf_ldap_message_value), asn1_err_to_str(ret));
}
return;
}
mscldap_tvb=tvb_new_subset(a->tvb, a->offset, len, len);
dissect_mscldap_response(attr_tree, mscldap_tvb, mscldap_rpc);
a->offset+=len;
}
}
}
}
static void dissect_ldap_response_search_ref(ASN1_SCK *a, proto_tree *tree)
{
read_string(a, tree, hf_ldap_message_search_reference, 0, 0, 0, ASN1_UNI, ASN1_OTS);
}
static void dissect_ldap_request_add(ASN1_SCK *a, proto_tree *tree, packet_info *pinfo)
{
guint seq_length;
int end_of_sequence;
int ret;
char *s = NULL;
if (read_string(a, tree, hf_ldap_message_dn, 0, &s, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", DN=%s", s != NULL ? s : "(null)");
g_free(s);
ret = read_sequence(a, &seq_length);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse add request sequence header: %s",
asn1_err_to_str(ret));
}
return;
}
end_of_sequence = a->offset + seq_length;
while (a->offset < end_of_sequence)
{
proto_item *ti;
proto_tree *attr_tree;
guint set_length;
int end_of_set;
ret = read_sequence(a, 0);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse LDAP attribute sequence header: %s",
asn1_err_to_str(ret));
}
return;
}
if (read_string(a, tree, hf_ldap_message_attribute, &ti, 0, 0, ASN1_UNI,
ASN1_OTS) != ASN1_ERR_NOERROR)
return;
attr_tree = proto_item_add_subtree(ti, ett_ldap_attribute);
ret = read_set(a, &set_length);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(attr_tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse LDAP value set header: %s",
asn1_err_to_str(ret));
}
return;
}
end_of_set = a->offset + set_length;
while (a->offset < end_of_set) {
if (read_string(a, attr_tree, hf_ldap_message_value, 0, 0, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
}
}
}
static void dissect_ldap_request_delete(ASN1_SCK *a, proto_tree *tree,
int start, guint length)
{
read_string_value(a, tree, hf_ldap_message_dn, NULL, NULL, start, length);
}
static void dissect_ldap_request_modifyrdn(ASN1_SCK *a, proto_tree *tree,
guint length)
{
int start = a->offset;
if (read_string(a, tree, hf_ldap_message_dn, 0, 0, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
if (read_string(a, tree, hf_ldap_message_modrdn_name, 0, 0, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
if (read_boolean(a, tree, hf_ldap_message_modrdn_delete, 0, 0) != ASN1_ERR_NOERROR)
return;
if (a->offset < (int) (start + length)) {
/* LDAP V3 Modify DN operation, with newSuperior */
/* "newSuperior [0] LDAPDN OPTIONAL" (0x80) */
if (read_string(a, tree, hf_ldap_message_modrdn_superior, 0, 0, 0, ASN1_CTX, 0) != ASN1_ERR_NOERROR)
return;
}
}
static void dissect_ldap_request_compare(ASN1_SCK *a, proto_tree *tree)
{
int start;
int length;
char *string1 = NULL;
char *string2 = NULL;
char *s1, *s2;
char *compare;
int ret;
if (read_string(a, tree, hf_ldap_message_dn, 0, 0, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
ret = read_sequence(a, 0);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse compare request sequence header: %s",
asn1_err_to_str(ret));
}
return;
}
start = a->offset;
ret = read_string(a, 0, -1, 0, &string1, 0, ASN1_UNI, ASN1_OTS);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"ERROR: Couldn't parse compare type: %s", asn1_err_to_str(ret));
}
return;
}
ret = read_string(a, 0, -1, 0, &string2, 0, ASN1_UNI, ASN1_OTS);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"ERROR: Couldn't parse compare value: %s", asn1_err_to_str(ret));
}
return;
}
s1 = (string1 == NULL) ? "(null)" : string1;
s2 = (string2 == NULL) ? "(null)" : string2;
length = 2 + strlen(s1) + strlen(s2);
compare = g_malloc0(length);
snprintf(compare, length, "%s=%s", s1, s2);
proto_tree_add_string(tree, hf_ldap_message_compare, a->tvb, start,
a->offset-start, compare);
g_free(string1);
g_free(string2);
g_free(compare);
return;
}
static void dissect_ldap_request_modify(ASN1_SCK *a, proto_tree *tree)
{
guint seq_length;
int end_of_sequence;
int ret;
if (read_string(a, tree, hf_ldap_message_dn, 0, 0, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
ret = read_sequence(a, &seq_length);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse modify request sequence header: %s",
asn1_err_to_str(ret));
}
return;
}
end_of_sequence = a->offset + seq_length;
while (a->offset < end_of_sequence)
{
proto_item *ti;
proto_tree *attr_tree;
guint set_length;
int end_of_set;
guint operation;
ret = read_sequence(a, 0);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse modify request item sequence header: %s",
asn1_err_to_str(ret));
}
return;
}
ret = read_integer(a, 0, -1, 0, &operation, ASN1_ENUM);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse modify operation: %s",
asn1_err_to_str(ret));
return;
}
}
ret = read_sequence(a, 0);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse modify request operation sequence header: %s",
asn1_err_to_str(ret));
}
return;
}
switch (operation)
{
case LDAP_MOD_ADD:
if (read_string(a, tree, hf_ldap_message_modify_add, &ti, 0, 0, ASN1_UNI,
ASN1_OTS) != ASN1_ERR_NOERROR)
return;
break;
case LDAP_MOD_REPLACE:
if (read_string(a, tree, hf_ldap_message_modify_replace, &ti, 0, 0,
ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
break;
case LDAP_MOD_DELETE:
if (read_string(a, tree, hf_ldap_message_modify_delete, &ti, 0, 0,
ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
break;
default:
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"Unknown LDAP modify operation (%u)", operation);
return;
}
attr_tree = proto_item_add_subtree(ti, ett_ldap_attribute);
ret = read_set(a, &set_length);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(attr_tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse LDAP value set header: %s",
asn1_err_to_str(ret));
}
return;
}
end_of_set = a->offset + set_length;
while (a->offset < end_of_set) {
if (read_string(a, attr_tree, hf_ldap_message_value, 0, 0, 0, ASN1_UNI,
ASN1_OTS) != ASN1_ERR_NOERROR)
return;
}
}
}
static void dissect_ldap_request_abandon(ASN1_SCK *a, proto_tree *tree,
int start, guint length)
{
read_integer_value(a, tree, hf_ldap_message_abandon_msgid, NULL, NULL,
start, length);
}
static ldap_call_response_t *
ldap_match_call_response(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, ldap_conv_info_t *ldap_info, guint messageId, guint protocolOpTag)
{
ldap_call_response_t lcr, *lcrp=NULL;
if (!pinfo->fd->flags.visited) {
switch(protocolOpTag){
case LDAP_REQ_BIND:
case LDAP_REQ_SEARCH:
case LDAP_REQ_MODIFY:
case LDAP_REQ_ADD:
case LDAP_REQ_DELETE:
case LDAP_REQ_MODRDN:
case LDAP_REQ_COMPARE:
/*case LDAP_REQ_ABANDON: we dont match for this one*/
/*case LDAP_REQ_UNBIND: we dont match for this one*/
/* check that we dont already have one of those in the
unmatched list and if so remove it */
lcr.messageId=messageId;
lcrp=g_hash_table_lookup(ldap_info->unmatched, &lcr);
if(lcrp){
g_hash_table_remove(ldap_info->unmatched, lcrp);
}
/* if we cant reuse the old one, grab a new chunk */
if(!lcrp){
lcrp=g_mem_chunk_alloc(ldap_call_response_chunk);
}
lcrp->messageId=messageId;
lcrp->req_frame=pinfo->fd->num;
lcrp->req_time.secs=pinfo->fd->abs_secs;
lcrp->req_time.nsecs=pinfo->fd->abs_usecs*1000;
lcrp->rep_frame=0;
lcrp->protocolOpTag=protocolOpTag;
lcrp->is_request=TRUE;
g_hash_table_insert(ldap_info->unmatched, lcrp, lcrp);
return NULL;
break;
case LDAP_RES_BIND:
case LDAP_RES_SEARCH_ENTRY:
case LDAP_RES_SEARCH_REF:
case LDAP_RES_SEARCH_RESULT:
case LDAP_RES_MODIFY:
case LDAP_RES_ADD:
case LDAP_RES_DELETE:
case LDAP_RES_MODRDN:
case LDAP_RES_COMPARE:
lcr.messageId=messageId;
lcrp=g_hash_table_lookup(ldap_info->unmatched, &lcr);
if(lcrp){
if(!lcrp->rep_frame){
g_hash_table_remove(ldap_info->unmatched, lcrp);
lcrp->rep_frame=pinfo->fd->num;
lcrp->is_request=FALSE;
g_hash_table_insert(ldap_info->matched, lcrp, lcrp);
}
}
}
}
if(!lcrp){
lcr.messageId=messageId;
switch(protocolOpTag){
case LDAP_REQ_BIND:
case LDAP_REQ_SEARCH:
case LDAP_REQ_MODIFY:
case LDAP_REQ_ADD:
case LDAP_REQ_DELETE:
case LDAP_REQ_MODRDN:
case LDAP_REQ_COMPARE:
/*case LDAP_REQ_ABANDON: we dont match for this one*/
/*case LDAP_REQ_UNBIND: we dont match for this one*/
lcr.is_request=TRUE;
lcr.req_frame=pinfo->fd->num;
lcr.rep_frame=0;
break;
case LDAP_RES_BIND:
case LDAP_RES_SEARCH_ENTRY:
case LDAP_RES_SEARCH_REF:
case LDAP_RES_SEARCH_RESULT:
case LDAP_RES_MODIFY:
case LDAP_RES_ADD:
case LDAP_RES_DELETE:
case LDAP_RES_MODRDN:
case LDAP_RES_COMPARE:
lcr.is_request=FALSE;
lcr.req_frame=0;
lcr.rep_frame=pinfo->fd->num;
break;
}
lcrp=g_hash_table_lookup(ldap_info->matched, &lcr);
if(lcrp){
lcrp->is_request=lcr.is_request;
}
}
if(lcrp){
if(lcrp->is_request){
proto_tree_add_uint(tree, hf_ldap_response_in, tvb, 0, 0, lcrp->rep_frame);
} else {
nstime_t ns;
proto_tree_add_uint(tree, hf_ldap_response_to, tvb, 0, 0, lcrp->req_frame);
ns.secs=pinfo->fd->abs_secs-lcrp->req_time.secs;
ns.nsecs=pinfo->fd->abs_usecs*1000-lcrp->req_time.nsecs;
if(ns.nsecs<0){
ns.nsecs+=1000000000;
ns.secs--;
}
proto_tree_add_time(tree, hf_ldap_time, tvb, 0, 0, &ns);
}
return lcrp;
}
return NULL;
}
static void
dissect_ldap_message(tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *ldap_tree, proto_item *ldap_item,
gboolean first_time, ldap_conv_info_t *ldap_info,
gboolean is_mscldap)
{
int message_id_start;
int message_id_length;
guint messageLength;
guint messageId;
int next_offset;
guint protocolOpCls, protocolOpCon, protocolOpTag;
gchar *typestr;
guint opLen;
ASN1_SCK a;
int start;
int ret;
ldap_call_response_t *lcrp;
asn1_open(&a, tvb, offset);
ret = read_sequence(&a, &messageLength);
if (ret != ASN1_ERR_NOERROR)
{
if (first_time)
{
if (check_col(pinfo->cinfo, COL_INFO))
{
col_add_fstr(pinfo->cinfo, COL_INFO,
"Invalid LDAP message (Can't parse sequence header: %s)",
asn1_err_to_str(ret));
}
}
if (ldap_tree)
{
proto_tree_add_text(ldap_tree, tvb, offset, -1,
"Invalid LDAP message (Can't parse sequence header: %s)",
asn1_err_to_str(ret));
}
return;
}
message_id_start = a.offset;
ret = read_integer(&a, 0, hf_ldap_message_id, 0, &messageId, ASN1_INT);
if (ret != ASN1_ERR_NOERROR)
{
if (first_time && check_col(pinfo->cinfo, COL_INFO))
col_add_fstr(pinfo->cinfo, COL_INFO, "Invalid LDAP packet (Can't parse Message ID: %s)",
asn1_err_to_str(ret));
if (ldap_tree)
proto_tree_add_text(ldap_tree, tvb, message_id_start, 1,
"Invalid LDAP packet (Can't parse Message ID: %s)",
asn1_err_to_str(ret));
return;
}
message_id_length = a.offset - message_id_start;
start = a.offset;
asn1_id_decode(&a, &protocolOpCls, &protocolOpCon, &protocolOpTag);
if (protocolOpCls != ASN1_APL)
typestr = "Bad message type (not Application)";
else
typestr = val_to_str(protocolOpTag, msgTypes, "Unknown message type (%u)");
if (first_time)
{
if (check_col(pinfo->cinfo, COL_INFO))
col_add_fstr(pinfo->cinfo, COL_INFO, "MsgId=%u %s",
messageId, typestr);
}
if (ldap_item)
proto_item_append_text(ldap_item, ", %s",
val_to_str(protocolOpTag, msgTypes,
"Unknown message type (%u)"));
if (ldap_tree)
{
proto_tree_add_uint(ldap_tree, hf_ldap_message_id, tvb, message_id_start, message_id_length, messageId);
if (protocolOpCls == ASN1_APL)
{
proto_tree_add_uint(ldap_tree, hf_ldap_message_type, tvb,
start, a.offset - start, protocolOpTag);
}
else
{
proto_tree_add_text(ldap_tree, tvb, start, a.offset - start,
"%s", typestr);
}
}
start = a.offset;
if (read_length(&a, ldap_tree, hf_ldap_message_length, &opLen) != ASN1_ERR_NOERROR)
return;
if (protocolOpCls == ASN1_APL)
{
lcrp=ldap_match_call_response(tvb, pinfo, ldap_tree, ldap_info, messageId, protocolOpTag);
if(lcrp){
tap_queue_packet(ldap_tap, pinfo, lcrp);
}
switch (protocolOpTag)
{
case LDAP_REQ_BIND:
dissect_ldap_request_bind(&a, ldap_tree, tvb, pinfo, ldap_info);
break;
case LDAP_REQ_UNBIND:
/* Nothing to dissect */
break;
case LDAP_REQ_SEARCH:
dissect_ldap_request_search(&a, ldap_tree, pinfo);
break;
case LDAP_REQ_MODIFY:
dissect_ldap_request_modify(&a, ldap_tree);
break;
case LDAP_REQ_ADD:
dissect_ldap_request_add(&a, ldap_tree, pinfo);
break;
case LDAP_REQ_DELETE:
dissect_ldap_request_delete(&a, ldap_tree, start, opLen);
break;
case LDAP_REQ_MODRDN:
dissect_ldap_request_modifyrdn(&a, ldap_tree, opLen);
break;
case LDAP_REQ_COMPARE:
dissect_ldap_request_compare(&a, ldap_tree);
break;
case LDAP_REQ_ABANDON:
dissect_ldap_request_abandon(&a, ldap_tree, start, opLen);
break;
case LDAP_RES_BIND:
dissect_ldap_response_bind(&a, ldap_tree, start, opLen, tvb, pinfo, ldap_info);
break;
case LDAP_RES_SEARCH_ENTRY: {
/*
* XXX - this assumes that the LDAP_RES_SEARCH_ENTRY and
* LDAP_RES_SEARCH_RESULT appear in the same frame.
*/
guint32 *num_results = p_get_proto_data(pinfo->fd, proto_ldap);
if (!num_results) {
num_results = g_malloc(sizeof(guint32));
*num_results = 0;
p_add_proto_data(pinfo->fd, proto_ldap, num_results);
}
*num_results += 1;
dissect_ldap_response_search_entry(&a, ldap_tree, is_mscldap);
break;
}
case LDAP_RES_SEARCH_REF:
dissect_ldap_response_search_ref(&a, ldap_tree);
break;
case LDAP_RES_SEARCH_RESULT: {
guint32 *num_results = p_get_proto_data(pinfo->fd, proto_ldap);
if (num_results) {
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", %d result%s",
*num_results, *num_results == 1 ? "" : "s");
g_free(num_results);
p_rem_proto_data(pinfo->fd, proto_ldap);
}
dissect_ldap_result(&a, ldap_tree, pinfo);
break;
}
case LDAP_RES_MODIFY:
case LDAP_RES_ADD:
case LDAP_RES_DELETE:
case LDAP_RES_MODRDN:
case LDAP_RES_COMPARE:
dissect_ldap_result(&a, ldap_tree, pinfo);
break;
default:
if (ldap_tree)
{
proto_tree_add_text(ldap_tree, a.tvb, a.offset, opLen,
"Unknown LDAP operation (%u)", protocolOpTag);
}
break;
}
}
/*
* XXX - what if "next_offset" is past the offset of the next top-level
* sequence? Show that as an error?
*/
asn1_close(&a, &next_offset); /* XXX - use the new value of next_offset? */
}
static void
dissect_ldap_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gboolean is_mscldap)
{
int offset = 0;
gboolean first_time = TRUE;
conversation_t *conversation;
gboolean doing_sasl_security = FALSE;
guint length_remaining;
guint32 sasl_length;
guint32 message_data_len;
proto_item *ti = NULL;
proto_tree *ldap_tree = NULL;
ASN1_SCK a;
int ret;
guint messageLength;
int messageOffset;
guint headerLength;
guint length;
gint available_length, reported_length;
int len;
proto_item *gitem = NULL;
proto_tree *gtree = NULL;
tvbuff_t *next_tvb;
ldap_conv_info_t *ldap_info=NULL;
/*
* Do we have a conversation for this connection?
*/
conversation = find_conversation(&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->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 = g_mem_chunk_alloc(ldap_conv_info_chunk);
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);
/*
* 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) {
/*
* Yes. The frame begins with a 4-byte big-endian length.
* Can we do reassembly?
*/
if (ldap_desegment && pinfo->can_desegment) {
/*
* Yes - is the SASL length split across segment boundaries?
*/
if (length_remaining < 4) {
/*
* 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 = 4 - length_remaining;
return;
}
}
/*
* 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_length = tvb_get_ntohl(tvb, offset);
message_data_len = sasl_length + 4;
if (message_data_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 < message_data_len) {
/* provide a hint to TCP where the next PDU starts */
pinfo->want_pdu_tracking=2;
pinfo->bytes_until_next_pdu=message_data_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 = message_data_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 > message_data_len)
length = message_data_len;
next_tvb = tvb_new_subset(tvb, offset, length, message_data_len);
/*
* If this is the first PDU, set the Protocol column and clear the
* Info column.
*/
if (first_time)
{
if (check_col(pinfo->cinfo, COL_PROTOCOL))
col_set_str(pinfo->cinfo, COL_PROTOCOL, (gchar *)pinfo->current_proto);
if (check_col(pinfo->cinfo, COL_INFO))
col_clear(pinfo->cinfo, COL_INFO);
}
if (tree)
{
ti = proto_tree_add_item(tree, proto_ldap, next_tvb, 0, -1, FALSE);
ldap_tree = proto_item_add_subtree(ti, ett_ldap);
proto_tree_add_uint(ldap_tree, hf_ldap_sasl_buffer_length, tvb, 0, 4,
sasl_length);
}
if (ldap_info->auth_mech != NULL &&
strcmp(ldap_info->auth_mech, "GSS-SPNEGO") == 0) {
/*
* 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.
*/
available_length = tvb_length_remaining(tvb, 4);
reported_length = tvb_reported_length_remaining(tvb, 4);
g_assert(available_length >= 0);
g_assert(reported_length >= 0);
if (available_length > reported_length)
available_length = reported_length;
if ((guint)available_length > sasl_length - 4)
available_length = sasl_length - 4;
if ((guint)reported_length > sasl_length - 4)
reported_length = sasl_length - 4;
next_tvb = tvb_new_subset(tvb, 4, available_length, reported_length);
if (tree)
{
gitem = proto_tree_add_text(ldap_tree, next_tvb, 0, -1, "GSS-API Token");
gtree = proto_item_add_subtree(gitem, ett_ldap_gssapi_token);
}
len = call_dissector(gssapi_wrap_handle, next_tvb, pinfo, gtree);
/*
* if len is 0 it probably mean that we got a PDU that is not
* aligned to the start of the segment.
*/
if(len==0){
return;
}
if (gitem != NULL)
proto_item_set_len(gitem, len);
/*
* Now dissect the LDAP message.
*/
dissect_ldap_message(tvb, 4 + len, pinfo, ldap_tree, ti, first_time, ldap_info, is_mscldap);
} else {
/*
* We don't know how to handle other authentication mechanisms
* yet, so just put in an entry for the SASL buffer.
*/
proto_tree_add_text(ldap_tree, tvb, 4, -1, "SASL buffer");
}
offset += message_data_len;
} else {
/*
* No, we're not doing a SASL security layer. 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) {
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( (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;
continue;
}
/*
* OK, try to read the "Sequence Of" header; this gets the total
* length of the LDAP message.
*/
asn1_open(&a, tvb, offset);
ret = read_sequence(&a, &messageLength);
asn1_close(&a, &messageOffset);
if (ret == ASN1_ERR_NOERROR) {
/*
* Add the length of the "Sequence Of" header to the message
* length.
*/
headerLength = messageOffset - offset;
messageLength += headerLength;
if (messageLength < 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.
*/
messageLength = length_remaining;
}
/*
* Is the message split across segment boundaries?
*/
if (length_remaining < messageLength) {
/* provide a hint to TCP where the next PDU starts */
pinfo->want_pdu_tracking=2;
pinfo->bytes_until_next_pdu=messageLength-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 = messageLength - length_remaining;
return;
}
}
/*
* If this is the first PDU, set the Protocol column and clear the
* Info column.
*/
if (first_time) {
if (check_col(pinfo->cinfo, COL_PROTOCOL))
col_set_str(pinfo->cinfo, COL_PROTOCOL, (gchar *)pinfo->current_proto);
if (check_col(pinfo->cinfo, COL_INFO))
col_clear(pinfo->cinfo, COL_INFO);
}
/*
* 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 > messageLength)
length = messageLength;
next_tvb = tvb_new_subset(tvb, offset, length, messageLength);
/*
* Now dissect the LDAP message.
*/
if (tree) {
ti = proto_tree_add_item(tree, proto_ldap, next_tvb, 0, -1, FALSE);
ldap_tree = proto_item_add_subtree(ti, ett_ldap);
} else
ldap_tree = NULL;
dissect_ldap_message(next_tvb, 0, pinfo, ldap_tree, ti, first_time, ldap_info, is_mscldap);
offset += messageLength;
}
first_time = FALSE;
}
}
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;
}
if (ldap_conv_info_chunk != NULL)
g_mem_chunk_destroy(ldap_conv_info_chunk);
ldap_info_items = NULL;
ldap_conv_info_chunk = g_mem_chunk_new("ldap_conv_info_chunk",
sizeof(ldap_conv_info_t),
ldap_conv_info_chunk_count * sizeof(ldap_conv_info_t),
G_ALLOC_ONLY);
if (ldap_call_response_chunk != NULL)
g_mem_chunk_destroy(ldap_call_response_chunk);
ldap_call_response_chunk = g_mem_chunk_new("ldap_call_response_chunk",
sizeof(ldap_call_response_t),
ldap_call_response_chunk_count * sizeof(ldap_call_response_t),
G_ALLOC_ONLY);
}
void
proto_register_ldap(void)
{
static value_string auth_types[] = {
{LDAP_AUTH_SIMPLE, "Simple"},
{LDAP_AUTH_KRBV4LDAP, "Kerberos V4 to the LDAP server"},
{LDAP_AUTH_KRBV4DSA, "Kerberos V4 to the DSA"},
{LDAP_AUTH_SASL, "SASL"},
{0, NULL},
};
static value_string search_scope[] = {
{0x00, "Base"},
{0x01, "Single"},
{0x02, "Subtree"},
{0x00, NULL},
};
static value_string search_dereference[] = {
{0x00, "Never"},
{0x01, "Searching"},
{0x02, "Base Object"},
{0x03, "Always"},
{0x00, NULL},
};
static hf_register_info hf[] = {
{ &hf_ldap_response_in,
{ "Response In", "ldap.response_in",
FT_FRAMENUM, BASE_DEC, NULL, 0x0,
"The response to this packet is in this frame", HFILL }},
{ &hf_ldap_response_to,
{ "Response To", "ldap.response_to",
FT_FRAMENUM, BASE_DEC, NULL, 0x0,
"This is a response to the LDAP command in this frame", HFILL }},
{ &hf_ldap_time,
{ "Time", "ldap.time",
FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0,
"The time between the Call and the Reply", HFILL }},
{ &hf_ldap_sasl_buffer_length,
{ "SASL Buffer Length", "ldap.sasl_buffer_length",
FT_UINT32, BASE_DEC, NULL, 0x0,
"SASL Buffer Length", HFILL }},
{ &hf_ldap_length,
{ "Length", "ldap.length",
FT_UINT32, BASE_DEC, NULL, 0x0,
"LDAP Length", HFILL }},
{ &hf_ldap_message_id,
{ "Message Id", "ldap.message_id",
FT_UINT32, BASE_DEC, NULL, 0x0,
"LDAP Message Id", HFILL }},
{ &hf_ldap_message_type,
{ "Message Type", "ldap.message_type",
FT_UINT8, BASE_HEX, &msgTypes, 0x0,
"LDAP Message Type", HFILL }},
{ &hf_ldap_message_length,
{ "Message Length", "ldap.message_length",
FT_UINT32, BASE_DEC, NULL, 0x0,
"LDAP Message Length", HFILL }},
{ &hf_ldap_message_result,
{ "Result Code", "ldap.result.code",
FT_UINT8, BASE_HEX, VALS(LDAPResultCode_vals), 0x0,
"LDAP Result Code", HFILL }},
{ &hf_ldap_message_result_matcheddn,
{ "Matched DN", "ldap.result.matcheddn",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Result Matched DN", HFILL }},
{ &hf_ldap_message_result_errormsg,
{ "Error Message", "ldap.result.errormsg",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Result Error Message", HFILL }},
{ &hf_ldap_message_result_referral,
{ "Referral", "ldap.result.referral",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Result Referral URL", HFILL }},
{ &hf_ldap_message_bind_version,
{ "Version", "ldap.bind.version",
FT_UINT32, BASE_DEC, NULL, 0x0,
"LDAP Bind Version", HFILL }},
{ &hf_ldap_message_bind_dn,
{ "DN", "ldap.bind.dn",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Bind Distinguished Name", HFILL }},
{ &hf_ldap_message_bind_auth,
{ "Auth Type", "ldap.bind.auth_type",
FT_UINT8, BASE_HEX, auth_types, 0x0,
"LDAP Bind Auth Type", HFILL }},
{ &hf_ldap_message_bind_auth_password,
{ "Password", "ldap.bind.password",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Bind Password", HFILL }},
{ &hf_ldap_message_bind_auth_mechanism,
{ "Mechanism", "ldap.bind.mechanism",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Bind Mechanism", HFILL }},
{ &hf_ldap_message_bind_auth_credentials,
{ "Credentials", "ldap.bind.credentials",
FT_BYTES, BASE_NONE, NULL, 0x0,
"LDAP Bind Credentials", HFILL }},
{ &hf_ldap_message_bind_server_credentials,
{ "Server Credentials", "ldap.bind.server_credentials",
FT_BYTES, BASE_NONE, NULL, 0x0,
"LDAP Bind Server Credentials", HFILL }},
{ &hf_ldap_message_search_base,
{ "Base DN", "ldap.search.basedn",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Search Base Distinguished Name", HFILL }},
{ &hf_ldap_message_search_scope,
{ "Scope", "ldap.search.scope",
FT_UINT8, BASE_HEX, search_scope, 0x0,
"LDAP Search Scope", HFILL }},
{ &hf_ldap_message_search_deref,
{ "Dereference", "ldap.search.dereference",
FT_UINT8, BASE_HEX, search_dereference, 0x0,
"LDAP Search Dereference", HFILL }},
{ &hf_ldap_message_search_sizeLimit,
{ "Size Limit", "ldap.search.sizelimit",
FT_UINT32, BASE_DEC, NULL, 0x0,
"LDAP Search Size Limit", HFILL }},
{ &hf_ldap_message_search_timeLimit,
{ "Time Limit", "ldap.search.timelimit",
FT_UINT32, BASE_DEC, NULL, 0x0,
"LDAP Search Time Limit", HFILL }},
{ &hf_ldap_message_search_typesOnly,
{ "Attributes Only", "ldap.search.typesonly",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
"LDAP Search Attributes Only", HFILL }},
{ &hf_ldap_message_search_filter,
{ "Filter", "ldap.search.filter",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Search Filter", HFILL }},
{ &hf_ldap_message_search_reference,
{ "Reference URL", "ldap.search.reference",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Search Reference URL", HFILL }},
{ &hf_ldap_message_dn,
{ "Distinguished Name", "ldap.dn",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Distinguished Name", HFILL }},
{ &hf_ldap_message_attribute,
{ "Attribute", "ldap.attribute",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Attribute", HFILL }},
/*
* XXX - not all LDAP values are text strings; we'd need a file
* describing which values (by name) are text strings and which are
* binary.
*
* Some values that are, at least in Microsoft's schema, binary
* are:
*
* invocationId
* nTSecurityDescriptor
* objectGUID
*/
{ &hf_ldap_message_value,
{ "Value", "ldap.value",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Value", HFILL }},
{ &hf_ldap_message_modrdn_name,
{ "New Name", "ldap.modrdn.name",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP New Name", HFILL }},
{ &hf_ldap_message_modrdn_delete,
{ "Delete Values", "ldap.modrdn.delete",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
"LDAP Modify RDN - Delete original values", HFILL }},
{ &hf_ldap_message_modrdn_superior,
{ "New Location", "ldap.modrdn.superior",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Modify RDN - New Location", HFILL }},
{ &hf_ldap_message_compare,
{ "Test", "ldap.compare.test",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Compare Test", HFILL }},
{ &hf_ldap_message_modify_add,
{ "Add", "ldap.modify.add",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Add", HFILL }},
{ &hf_ldap_message_modify_replace,
{ "Replace", "ldap.modify.replace",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Replace", HFILL }},
{ &hf_ldap_message_modify_delete,
{ "Delete", "ldap.modify.delete",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Delete", HFILL }},
{ &hf_ldap_message_abandon_msgid,
{ "Abandon Msg Id", "ldap.abandon.msgid",
FT_UINT32, BASE_DEC, NULL, 0x0,
"LDAP Abandon Msg Id", HFILL }},
{ &hf_mscldap_netlogon_type,
{ "Type", "mscldap.netlogon.type",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Type of <please tell ethereal developers what this type is>", HFILL }},
{ &hf_mscldap_netlogon_version,
{ "Version", "mscldap.netlogon.version",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Version of <please tell ethereal developers what this type is>", HFILL }},
{ &hf_mscldap_netlogon_lm_token,
{ "LM Token", "mscldap.netlogon.lm_token",
FT_UINT16, BASE_HEX, NULL, 0x0,
"LM Token", HFILL }},
{ &hf_mscldap_netlogon_nt_token,
{ "NT Token", "mscldap.netlogon.nt_token",
FT_UINT16, BASE_HEX, NULL, 0x0,
"NT Token", HFILL }},
{ &hf_mscldap_netlogon_flags,
{ "Flags", "mscldap.netlogon.flags",
FT_UINT32, BASE_HEX, NULL, 0x0,
"Netlogon flags describing the DC properties", HFILL }},
{ &hf_mscldap_domain_guid,
{ "Domain GUID", "mscldap.domain.guid",
FT_BYTES, BASE_HEX, NULL, 0x0,
"Domain GUID", HFILL }},
{ &hf_mscldap_forest,
{ "Forest", "mscldap.forest",
FT_STRING, BASE_NONE, NULL, 0x0,
"Forest", HFILL }},
{ &hf_mscldap_domain,
{ "Domain", "mscldap.domain",
FT_STRING, BASE_NONE, NULL, 0x0,
"Domainname", HFILL }},
{ &hf_mscldap_hostname,
{ "Hostname", "mscldap.hostname",
FT_STRING, BASE_NONE, NULL, 0x0,
"Hostname", HFILL }},
{ &hf_mscldap_nb_domain,
{ "NetBios Domain", "mscldap.nb_domain",
FT_STRING, BASE_NONE, NULL, 0x0,
"NetBios Domainname", HFILL }},
{ &hf_mscldap_nb_hostname,
{ "NetBios Hostname", "mscldap.nb_hostname",
FT_STRING, BASE_NONE, NULL, 0x0,
"NetBios Hostname", HFILL }},
{ &hf_mscldap_username,
{ "User", "mscldap.username",
FT_STRING, BASE_NONE, NULL, 0x0,
"User name", HFILL }},
{ &hf_mscldap_sitename,
{ "Site", "mscldap.sitename",
FT_STRING, BASE_NONE, NULL, 0x0,
"Site name", HFILL }},
{ &hf_mscldap_clientsitename,
{ "Client Site", "mscldap.clientsitename",
FT_STRING, BASE_NONE, NULL, 0x0,
"Client Site name", HFILL }},
{ &hf_mscldap_netlogon_flags_pdc,
{ "PDC", "mscldap.netlogon.flags.pdc", FT_BOOLEAN, 32,
TFS(&tfs_ads_pdc), 0x00000001, "Is this DC a PDC or not?", HFILL }},
{ &hf_mscldap_netlogon_flags_gc,
{ "GC", "mscldap.netlogon.flags.gc", FT_BOOLEAN, 32,
TFS(&tfs_ads_gc), 0x00000004, "Does this dc service as a GLOBAL CATALOGUE?", HFILL }},
{ &hf_mscldap_netlogon_flags_ldap,
{ "LDAP", "mscldap.netlogon.flags.ldap", FT_BOOLEAN, 32,
TFS(&tfs_ads_ldap), 0x00000008, "Does this DC act as an LDAP server?", HFILL }},
{ &hf_mscldap_netlogon_flags_ds,
{ "DS", "mscldap.netlogon.flags.ds", FT_BOOLEAN, 32,
TFS(&tfs_ads_ds), 0x00000010, "Does this dc provide DS services?", HFILL }},
{ &hf_mscldap_netlogon_flags_kdc,
{ "KDC", "mscldap.netlogon.flags.kdc", FT_BOOLEAN, 32,
TFS(&tfs_ads_kdc), 0x00000020, "Does this dc act as a KDC?", HFILL }},
{ &hf_mscldap_netlogon_flags_timeserv,
{ "Time Serv", "mscldap.netlogon.flags.timeserv", FT_BOOLEAN, 32,
TFS(&tfs_ads_timeserv), 0x00000040, "Does this dc provide time services (ntp) ?", HFILL }},
{ &hf_mscldap_netlogon_flags_closest,
{ "Closest", "mscldap.netlogon.flags.closest", FT_BOOLEAN, 32,
TFS(&tfs_ads_closest), 0x00000080, "Is this the closest dc? (is this used at all?)", HFILL }},
{ &hf_mscldap_netlogon_flags_writable,
{ "Writable", "mscldap.netlogon.flags.writable", FT_BOOLEAN, 32,
TFS(&tfs_ads_writable), 0x00000100, "Is this dc writable? (i.e. can it update the AD?)", HFILL }},
{ &hf_mscldap_netlogon_flags_good_timeserv,
{ "Good Time Serv", "mscldap.netlogon.flags.good_timeserv", FT_BOOLEAN, 32,
TFS(&tfs_ads_good_timeserv), 0x00000200, "Is this a Good Time Server? (i.e. does it have a hardware clock)", HFILL }},
{ &hf_mscldap_netlogon_flags_ndnc,
{ "NDNC", "mscldap.netlogon.flags.ndnc", FT_BOOLEAN, 32,
TFS(&tfs_ads_ndnc), 0x00000400, "Is this an NDNC dc?", HFILL }},
};
static gint *ett[] = {
&ett_ldap,
&ett_ldap_gssapi_token,
&ett_ldap_referrals,
&ett_ldap_attribute,
&ett_mscldap_netlogon_flags
};
module_t *ldap_module;
proto_ldap = proto_register_protocol("Lightweight Directory Access Protocol",
"LDAP", "ldap");
proto_register_field_array(proto_ldap, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
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");
}
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");
}
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