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packet-aim.c

/* packet-aim.c
 * Routines for AIM Instant Messenger (OSCAR) dissection
 * Copyright 2000, Ralf Hoelzer <ralf@well.com>
 * Copyright 2004, Jelmer Vernooij <jelmer@samba.org>
 * Copyright 2004, Devin Heitmueller <dheitmueller@netilla.com>
 *
 * $Id: packet-aim.c 28412 2009-05-19 17:16:14Z stig $
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#include <glib.h>

#include "isprint.h"

#include <epan/packet.h>
#include <epan/strutil.h>

#include "packet-tcp.h"
#include "packet-aim.h"
#include <epan/prefs.h>

#define TCP_PORT_AIM 5190

#define STRIP_TAGS 1

/* channels */
#define CHANNEL_NEW_CONN    0x01
#define CHANNEL_SNAC_DATA   0x02
#define CHANNEL_FLAP_ERR    0x03
#define CHANNEL_CLOSE_CONN  0x04
#define CHANNEL_KEEP_ALIVE  0x05

#define FAMILY_ALL_ERROR_INVALID_HEADER                0x0001
#define FAMILY_ALL_ERROR_SERVER_RATE_LIMIT_EXCEEDED    0x0002
#define FAMILY_ALL_ERROR_CLIENT_RATE_LIMIT_EXCEEDED    0x0003
#define FAMILY_ALL_ERROR_RECIPIENT_NOT_LOGGED_IN       0x0004
#define FAMILY_ALL_ERROR_REQUESTED_SERVICE_UNAVAILABLE 0x0005
#define FAMILY_ALL_ERROR_REQUESTED_SERVICE_NOT_DEFINED 0x0006
#define FAMILY_ALL_ERROR_OBSOLETE_SNAC                 0x0007
#define FAMILY_ALL_ERROR_NOT_SUPPORTED_BY_SERVER       0x0008
#define FAMILY_ALL_ERROR_NOT_SUPPORTED_BY_CLIENT       0x0009
#define FAMILY_ALL_ERROR_REFUSED_BY_CLIENT             0x000a
#define FAMILY_ALL_ERROR_REPLY_TOO_BIG                 0x000b
#define FAMILY_ALL_ERROR_RESPONSES_LOST                0x000c
#define FAMILY_ALL_ERROR_REQUEST_DENIED                0x000d
#define FAMILY_ALL_ERROR_INCORRECT_SNAC_FORMAT         0x000e
#define FAMILY_ALL_ERROR_INSUFFICIENT_RIGHTS           0x000f
#define FAMILY_ALL_ERROR_RECIPIENT_BLOCKED             0x0010
#define FAMILY_ALL_ERROR_SENDER_TOO_EVIL               0x0011
#define FAMILY_ALL_ERROR_RECEIVER_TOO_EVIL             0x0012
#define FAMILY_ALL_ERROR_USER_TEMP_UNAVAILABLE         0x0013
#define FAMILY_ALL_ERROR_NO_MATCH                      0x0014
#define FAMILY_ALL_ERROR_LIST_OVERFLOW                 0x0015
#define FAMILY_ALL_ERROR_REQUEST_AMBIGUOUS             0x0016
#define FAMILY_ALL_ERROR_SERVER_QUEUE_FULL             0x0017
#define FAMILY_ALL_ERROR_NOT_WHILE_ON_AOL              0x0018

static const value_string aim_flap_channels[] = {
    { CHANNEL_NEW_CONN, "New Connection" },
    { CHANNEL_SNAC_DATA, "SNAC Data" },
    { CHANNEL_FLAP_ERR, "FLAP-Level Error" },
    { CHANNEL_CLOSE_CONN, "Close Connection" },
    { CHANNEL_KEEP_ALIVE, "Keep Alive" },
    { 0, NULL }
};

static const value_string aim_snac_errors[] = {
  { FAMILY_ALL_ERROR_INVALID_HEADER, "Invalid SNAC Header" },
  { FAMILY_ALL_ERROR_SERVER_RATE_LIMIT_EXCEEDED, "Server rate limit exceeded" },
  { FAMILY_ALL_ERROR_CLIENT_RATE_LIMIT_EXCEEDED, "Client rate limit exceeded" },
  { FAMILY_ALL_ERROR_RECIPIENT_NOT_LOGGED_IN, "Recipient not logged in" },
  { FAMILY_ALL_ERROR_REQUESTED_SERVICE_UNAVAILABLE, "Requested service unavailable" },
  { FAMILY_ALL_ERROR_REQUESTED_SERVICE_NOT_DEFINED, "Requested service not defined" },
  { FAMILY_ALL_ERROR_OBSOLETE_SNAC, "Obsolete SNAC issued" },
  { FAMILY_ALL_ERROR_NOT_SUPPORTED_BY_SERVER, "Not supported by server" },
  { FAMILY_ALL_ERROR_NOT_SUPPORTED_BY_CLIENT, "Not supported by client" },
  { FAMILY_ALL_ERROR_REFUSED_BY_CLIENT, "Refused by client" },
  { FAMILY_ALL_ERROR_REPLY_TOO_BIG, "Reply too big" },
  { FAMILY_ALL_ERROR_RESPONSES_LOST, "Responses lost" },
  { FAMILY_ALL_ERROR_REQUEST_DENIED, "Request denied" },
  { FAMILY_ALL_ERROR_INCORRECT_SNAC_FORMAT, "Incorrect SNAC format" },
  { FAMILY_ALL_ERROR_INSUFFICIENT_RIGHTS, "Insufficient rights" },
  { FAMILY_ALL_ERROR_RECIPIENT_BLOCKED, "Recipient blocked" },
  { FAMILY_ALL_ERROR_SENDER_TOO_EVIL, "Sender too evil" },
  { FAMILY_ALL_ERROR_RECEIVER_TOO_EVIL, "Receiver too evil" },
  { FAMILY_ALL_ERROR_USER_TEMP_UNAVAILABLE, "User temporarily unavailable" },
  { FAMILY_ALL_ERROR_NO_MATCH, "No match" },
  { FAMILY_ALL_ERROR_LIST_OVERFLOW, "List overflow" },
  { FAMILY_ALL_ERROR_REQUEST_AMBIGUOUS, "Request ambiguous" },
  { FAMILY_ALL_ERROR_SERVER_QUEUE_FULL, "Server queue full" },
  { FAMILY_ALL_ERROR_NOT_WHILE_ON_AOL, "Not while on AOL" },
  { 0, NULL }
};

#define AIM_CLIENT_TLV_SCREEN_NAME             0x0001
#define AIM_CLIENT_TLV_NEW_ROASTED_PASSWORD    0x0002
#define AIM_CLIENT_TLV_CLIENT_ID_STRING        0x0003
#define AIM_CLIENT_TLV_ERRORURL                0x0004
#define AIM_CLIENT_TLV_BOS_SERVER_STRING       0x0005
#define AIM_CLIENT_TLV_AUTH_COOKIE             0x0006
#define AIM_CLIENT_TLV_ERRORCODE               0x0008
#define AIM_CLIENT_TLV_DISCONNECT_REASON       0x0009
#define AIM_CLIENT_TLV_RECONNECT_HOST          0x000a
#define AIM_CLIENT_TLV_URL                     0x000b
#define AIM_CLIENT_TLV_DEBUG_DATA              0x000c
#define AIM_CLIENT_TLV_FAMILY_ID               0x000d
#define AIM_CLIENT_TLV_CLIENT_COUNTRY          0x000e
#define AIM_CLIENT_TLV_CLIENT_LANGUAGE         0x000f
#define AIM_CLIENT_TLV_EMAILADDR               0x0011
#define AIM_CLIENT_TLV_OLD_ROASTED_PASSWORD    0x0012
#define AIM_CLIENT_TLV_REGSTATUS               0x0013
#define AIM_CLIENT_TLV_CLIENT_DISTRIBUTION_NUM 0x0014
#define AIM_CLIENT_TLV_INVITEMESSAGE           0x0015
#define AIM_CLIENT_TLV_CLIENT_ID               0x0016
#define AIM_CLIENT_TLV_CLIENT_MAJOR_VERSION    0x0017
#define AIM_CLIENT_TLV_CLIENT_MINOR_VERSION    0x0018
#define AIM_CLIENT_TLV_CLIENT_LESSER_VERSION   0x0019
#define AIM_CLIENT_TLV_CLIENT_BUILD_NUMBER     0x001a
#define AIM_CLIENT_TLV_PASSWORD_MD5            0x0025
#define AIM_CLIENT_TLV_LATESTBETABUILD         0x0040
#define AIM_CLIENT_TLV_LATESTBETAURL           0x0041
#define AIM_CLIENT_TLV_LATESTBETAINFO          0x0042
#define AIM_CLIENT_TLV_LATESTBETANAME          0x0043
#define AIM_CLIENT_TLV_LATESTRELEASEBUILD      0x0044
#define AIM_CLIENT_TLV_LATESTRELEASEURL        0x0045
#define AIM_CLIENT_TLV_LATESTRELEASEINFO       0x0046
#define AIM_CLIENT_TLV_LATESTRELEASENAME       0x0047
#define AIM_CLIENT_TLV_BETA_DIGEST_SIG         0x0048
#define AIM_CLIENT_TLV_RELEASE_DIGEST_SIG      0x0049
#define AIM_CLIENT_TLV_CLIENTUSESSI            0x004a
#define AIM_CLIENT_TLV_CHANGE_PASSWORD_URL     0x0054
#define AIM_CLIENT_TLV_AWAITING_AUTH           0x0066
#define AIM_CLIENT_TLV_MEMBERS                 0x00c8
#define AIM_CLIENT_TLV_VISIBILITY_BITS         0x00c9
#define AIM_CLIENT_TLV_PRIVACY                 0x00ca
#define AIM_CLIENT_TLV_VISIBLE_CLASS           0x00cb
#define AIM_CLIENT_TLV_VISIBLE_MISC            0x00cc
#define AIM_CLIENT_TLV_ICQ2K_SHORTCUT          0x00cd
#define AIM_CLIENT_TLV_FIRST_LOADED_TIME       0x00d4
#define AIM_CLIENT_TLV_BUDDY_ICON_MD5SUM       0x00d5
#define AIM_CLIENT_TLV_GIVEN_NAME              0x0131
#define AIM_CLIENT_TLV_LOCAL_EMAIL             0x0137
#define AIM_CLIENT_TLV_LOCAL_SMS               0x013a
#define AIM_CLIENT_TLV_LOCAL_COMMENT           0x013c
#define AIM_CLIENT_TLV_LOCAL_PERSONAL_ALERT    0x013d
#define AIM_CLIENT_TLV_LOCAL_PERSONAL_SOUND    0x013e
#define AIM_CLIENT_TLV_FIRST_MESSAGE_SENT      0x0145

const aim_tlv client_tlvs[] = {
  { AIM_CLIENT_TLV_SCREEN_NAME, "Screen name", dissect_aim_tlv_value_string },
  { AIM_CLIENT_TLV_NEW_ROASTED_PASSWORD, "Roasted password array", dissect_aim_tlv_value_bytes  },
  { AIM_CLIENT_TLV_OLD_ROASTED_PASSWORD, "Old roasted password array", dissect_aim_tlv_value_bytes  },
  { AIM_CLIENT_TLV_CLIENT_ID_STRING, "Client id string (name, version)", dissect_aim_tlv_value_string },
  { AIM_CLIENT_TLV_CLIENT_ID, "Client id number", dissect_aim_tlv_value_uint16 },
  { AIM_CLIENT_TLV_CLIENT_MAJOR_VERSION, "Client major version", dissect_aim_tlv_value_uint16 },
  { AIM_CLIENT_TLV_CLIENT_MINOR_VERSION, "Client minor version", dissect_aim_tlv_value_uint16 },
  { AIM_CLIENT_TLV_CLIENT_LESSER_VERSION, "Client lesser version", dissect_aim_tlv_value_uint16 },
  { AIM_CLIENT_TLV_CLIENT_BUILD_NUMBER, "Client build number", dissect_aim_tlv_value_uint16 },
  { AIM_CLIENT_TLV_PASSWORD_MD5, "Password Hash (MD5)", dissect_aim_tlv_value_bytes },
  { AIM_CLIENT_TLV_CLIENT_DISTRIBUTION_NUM, "Client distribution number", dissect_aim_tlv_value_uint32 },
  { AIM_CLIENT_TLV_CLIENT_LANGUAGE, "Client language", dissect_aim_tlv_value_string },
  { AIM_CLIENT_TLV_CLIENT_COUNTRY, "Client country", dissect_aim_tlv_value_string },
  { AIM_CLIENT_TLV_BOS_SERVER_STRING, "BOS server string", dissect_aim_tlv_value_string },
  { AIM_CLIENT_TLV_AUTH_COOKIE, "Authorization cookie", dissect_aim_tlv_value_bytes },
  { AIM_CLIENT_TLV_ERRORURL, "Error URL", dissect_aim_tlv_value_string },
  { AIM_CLIENT_TLV_ERRORCODE, "Error Code", dissect_aim_tlv_value_uint16 },
  { AIM_CLIENT_TLV_DISCONNECT_REASON, "Disconnect Reason", dissect_aim_tlv_value_uint16 },
  { AIM_CLIENT_TLV_RECONNECT_HOST, "Reconnect Hostname", dissect_aim_tlv_value_string },
  { AIM_CLIENT_TLV_URL, "URL", dissect_aim_tlv_value_string },
  { AIM_CLIENT_TLV_DEBUG_DATA, "Debug Data", dissect_aim_tlv_value_uint16 },
  { AIM_CLIENT_TLV_EMAILADDR, "Account Email address", dissect_aim_tlv_value_string },
  { AIM_CLIENT_TLV_REGSTATUS, "Registration Status", dissect_aim_tlv_value_uint16 },
  { AIM_CLIENT_TLV_LATESTBETABUILD, "Latest Beta Build", dissect_aim_tlv_value_uint32 },
  { AIM_CLIENT_TLV_LATESTBETAURL, "Latest Beta URL", dissect_aim_tlv_value_string },
  { AIM_CLIENT_TLV_LATESTBETAINFO, "Latest Beta Info", dissect_aim_tlv_value_string },
  { AIM_CLIENT_TLV_LATESTBETANAME, "Latest Beta Name", dissect_aim_tlv_value_string },
  { AIM_CLIENT_TLV_LATESTRELEASEBUILD, "Latest Release Build", dissect_aim_tlv_value_uint32 },
  { AIM_CLIENT_TLV_LATESTRELEASEURL, "Latest Release URL", dissect_aim_tlv_value_string },
  { AIM_CLIENT_TLV_LATESTRELEASEINFO, "Latest Release Info", dissect_aim_tlv_value_string  },
  { AIM_CLIENT_TLV_LATESTRELEASENAME, "Latest Release Name", dissect_aim_tlv_value_string },
  { AIM_CLIENT_TLV_BETA_DIGEST_SIG, "Beta Digest Signature (MD5)" , dissect_aim_tlv_value_bytes },
  { AIM_CLIENT_TLV_RELEASE_DIGEST_SIG, "Release Digest Signature (MD5)", dissect_aim_tlv_value_bytes },
  { AIM_CLIENT_TLV_CLIENTUSESSI, "Use SSI", dissect_aim_tlv_value_uint8 },
  { AIM_CLIENT_TLV_FAMILY_ID, "Service (SNAC Family) ID", dissect_aim_tlv_value_uint16 },
  { AIM_CLIENT_TLV_CHANGE_PASSWORD_URL, "Change password url", dissect_aim_tlv_value_string },
  { AIM_CLIENT_TLV_AWAITING_AUTH, "Awaiting Authorization", dissect_aim_tlv_value_bytes },
  { AIM_CLIENT_TLV_MEMBERS, "Members of this Group", dissect_aim_tlv_value_bytes },
  { AIM_CLIENT_TLV_VISIBILITY_BITS, "Bitfield", dissect_aim_tlv_value_bytes },
  { AIM_CLIENT_TLV_PRIVACY, "Privacy Settings" , dissect_aim_tlv_value_uint8 },
  { AIM_CLIENT_TLV_VISIBLE_CLASS, "Visible To Classes", dissect_aim_tlv_value_userclass },
  { AIM_CLIENT_TLV_VISIBLE_MISC, "Allow Others to See Data", dissect_aim_tlv_value_bytes },
  { AIM_CLIENT_TLV_ICQ2K_SHORTCUT, "ICQ2K Shortcut List", dissect_aim_tlv_value_string },
  { AIM_CLIENT_TLV_FIRST_LOADED_TIME, "First Time Buddy Was Added (Unix Timestamp)" , dissect_aim_tlv_value_uint32 },
  { AIM_CLIENT_TLV_BUDDY_ICON_MD5SUM, "MD5SUM of Current Buddy Icon", dissect_aim_tlv_value_bytes },
  { AIM_CLIENT_TLV_GIVEN_NAME, "Locally Specified Buddy Name", dissect_aim_tlv_value_string },
  { AIM_CLIENT_TLV_LOCAL_EMAIL, "Locally Specified Buddy Email", dissect_aim_tlv_value_string },
  { AIM_CLIENT_TLV_LOCAL_SMS, "Locally Specified Buddy SMS", dissect_aim_tlv_value_string },
  { AIM_CLIENT_TLV_LOCAL_COMMENT, "Locally Specified Buddy Comment", dissect_aim_tlv_value_string },
  { AIM_CLIENT_TLV_LOCAL_PERSONAL_ALERT, "Personal Alert for Buddy", dissect_aim_tlv_value_uint16 },
  { AIM_CLIENT_TLV_LOCAL_PERSONAL_SOUND, "Personal Sound for Buddy", dissect_aim_tlv_value_string },
  { AIM_CLIENT_TLV_FIRST_MESSAGE_SENT, "First Time Message Sent to Buddy (Unix Timestamp)", dissect_aim_tlv_value_uint32 },
  { 0, NULL, NULL }
};


static int dissect_aim_tlv_value_userstatus(proto_item *ti, guint16 valueid _U_, tvbuff_t *tvb, packet_info *pinfo _U_);
static int dissect_aim_tlv_value_dcinfo(proto_item *ti, guint16 valueid _U_, tvbuff_t *tvb, packet_info *pinfo _U_);

#define AIM_ONLINEBUDDY_USERCLASS      0x0001
#define AIM_ONLINEBUDDY_ONSINCE        0x0003
#define AIM_ONLINEBUDDY_IDLETIME       0x0004
#define AIM_ONLINEBUDDY_MEMBERSINCE    0x0005
#define AIM_ONLINEBUDDY_STATUS         0x0006
#define AIM_ONLINEBUDDY_IPADDR         0x000a
#define AIM_ONLINEBUDDY_DCINFO         0x000c
#define AIM_ONLINEBUDDY_CAPINFO        0x000d
#define AIM_ONLINEBUDDY_SESSIONLEN     0x000f
#define AIM_ONLINEBUDDY_ICQSESSIONLEN  0x0010
#define AIM_ONLINEBUDDY_TIMEUPDATE     0x0011
#define AIM_ONLINEBUDDY_MYINSTANCENUM  0x0014
#define AIM_ONLINEBUDDY_SHORTCAPS      0x0019
#define AIM_ONLINEBUDDY_BARTINFO       0x001d
#define AIM_ONLINEBUDDY_NICKFLAGS2     0x001f
#define AIM_ONLINEBUDDY_BUDDYFEEDTIME  0x0023
#define AIM_ONLINEBUDDY_SIGTIME        0x0026
#define AIM_ONLINEBUDDY_AWAYTIME       0x0027
#define AIM_ONLINEBUDDY_GEOCOUNTRY     0x002a

const aim_tlv onlinebuddy_tlvs[] = {
  { AIM_ONLINEBUDDY_USERCLASS, "User class", dissect_aim_tlv_value_userclass },
  { AIM_ONLINEBUDDY_ONSINCE, "Online since", dissect_aim_tlv_value_uint32 },
  { AIM_ONLINEBUDDY_IDLETIME, "Idle time (sec)", dissect_aim_tlv_value_uint16 },
  { AIM_ONLINEBUDDY_MEMBERSINCE, "Member since", dissect_aim_tlv_value_time },
  { AIM_ONLINEBUDDY_STATUS, "Online status", dissect_aim_tlv_value_userstatus },
  { AIM_ONLINEBUDDY_IPADDR, "User IP Address", dissect_aim_tlv_value_ipv4 },
  { AIM_ONLINEBUDDY_DCINFO, "DC Info", dissect_aim_tlv_value_dcinfo},
  { AIM_ONLINEBUDDY_CAPINFO, "Capability Info", dissect_aim_tlv_value_client_capabilities },
  { AIM_ONLINEBUDDY_TIMEUPDATE, "Time update", dissect_aim_tlv_value_bytes },
  { AIM_ONLINEBUDDY_SESSIONLEN, "Session Length (sec)", dissect_aim_tlv_value_uint32 },
  { AIM_ONLINEBUDDY_ICQSESSIONLEN, "ICQ Session Length (sec)", dissect_aim_tlv_value_uint32 },
  { AIM_ONLINEBUDDY_MYINSTANCENUM, "Client instance number", dissect_aim_tlv_value_uint8 },
  { AIM_ONLINEBUDDY_SHORTCAPS, "Short Capabilities", dissect_aim_tlv_value_bytes },
  { AIM_ONLINEBUDDY_BARTINFO, "BART Info", dissect_aim_tlv_value_bytes },
  { AIM_ONLINEBUDDY_NICKFLAGS2, "Upper bytes of Nick Flags", dissect_aim_tlv_value_bytes },
  { AIM_ONLINEBUDDY_BUDDYFEEDTIME, "Last Buddy Feed update", dissect_aim_tlv_value_time },
  { AIM_ONLINEBUDDY_SIGTIME, "Profile set time", dissect_aim_tlv_value_time },
  { AIM_ONLINEBUDDY_AWAYTIME, "Away set time", dissect_aim_tlv_value_time },
  { AIM_ONLINEBUDDY_GEOCOUNTRY, "Country code", dissect_aim_tlv_value_string },
  { 0, NULL, NULL }
};

#define DC_DISABLED           0x0000
#define DC_HTTPS        0x0001
#define DC_SOCKS        0x0002
#define DC_NORMAL       0x0003
#define DC_IMPOSSIBLE   0x0004

static const value_string dc_types[] = {
      { DC_DISABLED, "DC disabled" },
      { DC_HTTPS, "DC thru firewall or HTTPS proxy" },
      { DC_SOCKS, "DC thru SOCKS proxy" },
      { DC_NORMAL, "Regular connection" },
      { DC_IMPOSSIBLE, "DC not possible " },
      { 0, NULL },
};

#define PROTO_VERSION_ICQ98         0x0004
#define PROTO_VERSION_ICQ99         0x0006
#define PROTO_VERSION_ICQ2K         0x0007
#define PROTO_VERSION_ICQ2K1  0x0008
#define PROTO_VERSION_ICQLITE 0x0009
#define PROTO_VERSION_ICQ2K3B 0x000A

static const value_string protocol_versions[] = {
      { PROTO_VERSION_ICQ98, "ICQ '98" },
      { PROTO_VERSION_ICQ99, "ICQ '99" },
      { PROTO_VERSION_ICQ2K, "ICQ 2000" },
      { PROTO_VERSION_ICQ2K1, "ICQ 2001" },
      { PROTO_VERSION_ICQLITE, "ICQ Lite" },
      { PROTO_VERSION_ICQ2K3B, "ICQ 2003B" },
      { 0, NULL },
};

static GList *families = NULL;

#define AIM_MOTD_TLV_MOTD                                0x000B

const aim_tlv motd_tlvs[] = {
  { AIM_MOTD_TLV_MOTD, "Message of the day message", dissect_aim_tlv_value_string },
  { 0, NULL, NULL }
};

#define CLASS_UNCONFIRMED            0x00000001
#define CLASS_ADMINISTRATOR          0x00000002
#define CLASS_AOL                    0x00000004
#define CLASS_COMMERCIAL             0x00000008
#define CLASS_AIM                    0x00000010
#define CLASS_AWAY                   0x00000020
#define CLASS_ICQ                    0x00000040
#define CLASS_WIRELESS               0x00000080
#define CLASS_UNKNOWN100             0x00000100
#define CLASS_IMF                    0x00000200
#define CLASS_BOT                    0x00000400
#define CLASS_UNKNOWN800             0x00000800
#define CLASS_ONE_WAY_WIRELESS       0x00001000
#define CLASS_UNKNOWN2000            0x00002000
#define CLASS_UNKNOWN4000            0x00004000
#define CLASS_UNKNOWN8000            0x00008000
#define CLASS_UNKNOWN10000           0x00010000
#define CLASS_UNKNOWN20000           0x00020000
#define CLASS_NO_KNOCK_KNOCK         0x00040000
#define CLASS_FORWARD_MOBILE         0x00080000

#define FNAC_FLAG_NEXT_IS_RELATED    0x0001
#define FNAC_FLAG_CONTAINS_VERSION   0x8000

#define FNAC_TLV_FAMILY_VERSION  0x0001

static const aim_tlv fnac_tlvs[] = {
  { FNAC_TLV_FAMILY_VERSION, "SNAC Family Version", dissect_aim_tlv_value_uint16 },
  { 0, NULL, NULL }
};

#define SSI_OP_RESULT_SUCCESS            0
#define SSI_OP_RESULT_DB_ERROR           1
#define SSI_OP_RESULT_NOT_FOUND          2
#define SSI_OP_RESULT_ALREADY_EXISTS     3
#define SSI_OP_RESULT_UNAVAILABLE        5
#define SSI_OP_RESULT_BAD_REQUEST        10
#define SSI_OP_RESULT_DB_TIME_OUT        11
#define SSI_OP_RESULT_OVER_ROW_LIMIT     12
#define SSI_OP_RESULT_NOT_EXECUTED       13
#define SSI_OP_RESULT_AUTH_REQUIRED      14
#define SSI_OP_RESULT_BAD_LOGINID        16
#define SSI_OP_RESULT_OVER_BUDDY_LIMIT   17
#define SSI_OP_RESULT_INSERT_SMART_GROUP 20
#define SSI_OP_RESULT_TIMEOUT            26

static const value_string aim_ssi_result_codes[] = {
  { SSI_OP_RESULT_SUCCESS, "Success" },
  { SSI_OP_RESULT_DB_ERROR, "Some kind of database error" },
  { SSI_OP_RESULT_NOT_FOUND, "Item was not found for an update or delete" },
  { SSI_OP_RESULT_ALREADY_EXISTS, "Item already exists for an insert" },
  { SSI_OP_RESULT_UNAVAILABLE, "Server or database is not available" },
  { SSI_OP_RESULT_BAD_REQUEST, "Request was not formed well" },
  { SSI_OP_RESULT_DB_TIME_OUT, "Database timed out" },
  { SSI_OP_RESULT_OVER_ROW_LIMIT, "Too many items of this class for an insert" },
  { SSI_OP_RESULT_NOT_EXECUTED, "Not executed due to other error in same request" },
  { SSI_OP_RESULT_AUTH_REQUIRED, "Buddy List authorization required" },
  { SSI_OP_RESULT_BAD_LOGINID, "Bad loginId" },
  { SSI_OP_RESULT_OVER_BUDDY_LIMIT, "Too many buddies" },
  { SSI_OP_RESULT_INSERT_SMART_GROUP, "Attempt to added a Buddy to a smart group" },
  { SSI_OP_RESULT_TIMEOUT, "General timeout" },
  { 0, NULL }
};


static int dissect_aim(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static guint get_aim_pdu_len(packet_info *pinfo, tvbuff_t *tvb, int offset);
static void dissect_aim_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);

static void dissect_aim_newconn(tvbuff_t *tvb, packet_info *pinfo, int offset, proto_tree *tree);
static void dissect_aim_snac(tvbuff_t *tvb, packet_info *pinfo, 
                       int offset, proto_tree *tree, proto_tree *root_tree);
static void dissect_aim_flap_err(tvbuff_t *tvb, packet_info *pinfo, 
                         int offset, proto_tree *tree);
static void dissect_aim_keep_alive(tvbuff_t *tvb, packet_info *pinfo, 
                           int offset, proto_tree *tree);
static void dissect_aim_close_conn(tvbuff_t *tvb, packet_info *pinfo, 
                           int offset, proto_tree *tree);
static void dissect_aim_unknown_channel(tvbuff_t *tvb, packet_info *pinfo, 
                              int offset, proto_tree *tree);

static dissector_table_t subdissector_table;

/* Initialize the protocol and registered fields */
static int proto_aim = -1;
static int hf_aim_cmd_start = -1;
static int hf_aim_channel = -1;
static int hf_aim_seqno = -1;
static int hf_aim_data = -1;
static int hf_aim_data_len = -1;
static int hf_aim_signon_challenge_len = -1;
static int hf_aim_signon_challenge = -1;
static int hf_aim_fnac_family = -1;
static int hf_aim_fnac_subtype = -1;
static int hf_aim_fnac_flags = -1;
static int hf_aim_fnac_flag_next_is_related = -1;
static int hf_aim_fnac_flag_contains_version = -1;
static int hf_aim_fnac_id = -1;
static int hf_aim_infotype = -1;
static int hf_aim_buddyname_len = -1;
static int hf_aim_buddyname = -1;
static int hf_aim_userinfo_warninglevel = -1;
static int hf_aim_snac_error = -1;
static int hf_aim_ssi_result_code = -1;
static int hf_aim_tlvcount = -1;
static int hf_aim_version = -1;
static int hf_aim_userclass_unconfirmed = -1;
static int hf_aim_userclass_administrator = -1;
static int hf_aim_userclass_aol = -1;
static int hf_aim_userclass_commercial = -1;
static int hf_aim_userclass_aim = -1;
static int hf_aim_userclass_away = -1;
static int hf_aim_userclass_icq = -1;
static int hf_aim_userclass_wireless = -1;
static int hf_aim_userclass_unknown100 = -1;
static int hf_aim_userclass_imf = -1;
static int hf_aim_userclass_bot = -1;
static int hf_aim_userclass_unknown800 = -1;
static int hf_aim_userclass_one_way_wireless = -1;
static int hf_aim_userclass_unknown2000 = -1;
static int hf_aim_userclass_unknown4000 = -1;
static int hf_aim_userclass_unknown8000 = -1;
static int hf_aim_userclass_unknown10000 = -1;
static int hf_aim_userclass_unknown20000 = -1;
static int hf_aim_userclass_no_knock_knock = -1;
static int hf_aim_userclass_forward_mobile = -1;
static int hf_aim_messageblock_featuresdes = -1;
static int hf_aim_messageblock_featureslen = -1;
static int hf_aim_messageblock_features = -1;
static int hf_aim_messageblock_info = -1;
static int hf_aim_messageblock_len = -1;
static int hf_aim_messageblock_charset = -1;
static int hf_aim_messageblock_charsubset = -1;
static int hf_aim_messageblock_message = -1;

static int hf_aim_dcinfo_ip = -1;
static int hf_aim_dcinfo_tcpport = -1;
static int hf_aim_dcinfo_type = -1;
static int hf_aim_dcinfo_proto_version = -1;
static int hf_aim_dcinfo_auth_cookie = -1;
static int hf_aim_dcinfo_webport = -1;
static int hf_aim_dcinfo_client_future = -1;
static int hf_aim_dcinfo_last_info_update = -1;
static int hf_aim_dcinfo_last_ext_info_update = -1;
static int hf_aim_dcinfo_last_ext_status_update = -1;
static int hf_aim_dcinfo_unknown = -1;

/* Initialize the subtree pointers */
static gint ett_aim          = -1;
static gint ett_aim_dcinfo     = -1;
static gint ett_aim_buddyname= -1;
static gint ett_aim_fnac     = -1;
static gint ett_aim_fnac_flags = -1;
static gint ett_aim_tlv      = -1;
static gint ett_aim_userclass = -1;
static gint ett_aim_messageblock = -1;
static gint ett_aim_client_capabilities = -1;
static gint ett_aim_string08_array = -1;

/* desegmentation of AIM over TCP */
static gboolean aim_desegment = TRUE;

/* Code to actually dissect the packets */
static int dissect_aim(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
/* check, if this is really an AIM packet, they start with 0x2a */
/* XXX - I've seen some stuff starting with 0x5a followed by 0x2a */

  if(tvb_length(tvb) >= 1 && tvb_get_guint8(tvb, 0) != 0x2a) {
    /* Not an instant messenger packet, just happened to use the same port */
    /* XXX - if desegmentation disabled, this might be a continuation
       packet, not a non-AIM packet */
    return 0;
  }

  tcp_dissect_pdus(tvb, pinfo, tree, aim_desegment, 6, get_aim_pdu_len,
      dissect_aim_pdu);
  return tvb_length(tvb);
}

static guint get_aim_pdu_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset)
{
  guint16 plen;

  /*
   * Get the length of the AIM packet.
   */
  plen = tvb_get_ntohs(tvb, offset + 4);

  /*
   * That length doesn't include the length of the header itself; add that in.
   */
  return plen + 6;
}

static void dissect_aim_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
  /* Header fields */
  unsigned char  hdr_channel;           /* channel ID */
  unsigned short hdr_sequence_no;       /* Internal frame sequence number, not needed */
  unsigned short hdr_data_field_length; /* length of data within frame */

  int offset=0;

/* Set up structures we will need to add the protocol subtree and manage it */
  proto_item *ti;
  proto_tree *aim_tree = NULL;

/* Make entries in Protocol column and Info column on summary display */
  if (check_col(pinfo->cinfo, COL_PROTOCOL))
    col_set_str(pinfo->cinfo, COL_PROTOCOL, "AIM");

  if (check_col(pinfo->cinfo, COL_INFO))
    col_set_str(pinfo->cinfo, COL_INFO, "AOL Instant Messenger");

  /* get relevant header information */
  offset += 1;          /* XXX - put the identifier into the tree? */   
  hdr_channel           = tvb_get_guint8(tvb, offset);
  offset += 1;
  hdr_sequence_no       = tvb_get_ntohs(tvb, offset);
  offset += 2;
  hdr_data_field_length = tvb_get_ntohs(tvb, offset);
  offset += 2;

/* In the interest of speed, if "tree" is NULL, don't do any work not
   necessary to generate protocol tree items. */
  if (tree) {
    ti = proto_tree_add_item(tree, proto_aim, tvb, 0, -1, FALSE);
    aim_tree = proto_item_add_subtree(ti, ett_aim);
    proto_tree_add_uint(aim_tree, hf_aim_cmd_start, tvb, 0, 1, '*');
    proto_tree_add_item(aim_tree, hf_aim_channel, tvb, 1, 1, FALSE);
    proto_tree_add_uint(aim_tree, hf_aim_seqno, tvb, 2, 2, hdr_sequence_no);
    proto_tree_add_uint(aim_tree, hf_aim_data_len, tvb, 4, 2, hdr_data_field_length);

  }

  switch(hdr_channel)
  {
    case CHANNEL_NEW_CONN:
      dissect_aim_newconn(tvb, pinfo, offset, aim_tree);
      break;
    case CHANNEL_SNAC_DATA:
      dissect_aim_snac(tvb, pinfo, offset, aim_tree, tree);
      break;
    case CHANNEL_FLAP_ERR:
      dissect_aim_flap_err(tvb, pinfo, offset, aim_tree);
      break;
    case CHANNEL_CLOSE_CONN:
      dissect_aim_close_conn(tvb, pinfo, offset, aim_tree);
      break;
    case CHANNEL_KEEP_ALIVE:
     dissect_aim_keep_alive(tvb, pinfo, offset, aim_tree);
     break;
    default:
      dissect_aim_unknown_channel(tvb, pinfo, offset, aim_tree);
      break;
  }

}
const aim_subtype *aim_get_subtype( guint16 famnum, guint16 subtype )
{
      GList *gl = families;
      while(gl) {
            aim_family *fam = gl->data;
            if(fam->family == famnum) {
                  int i;
                  for(i = 0; fam->subtypes[i].name; i++) {
                        if(fam->subtypes[i].id == subtype) return &(fam->subtypes[i]);
                  }
            }
            gl = gl->next;
      }

      return NULL;

}

const aim_family *aim_get_family( guint16 famnum ) 
{
      GList *gl = families;
      while(gl) {
            aim_family *fam = gl->data;
            if(fam->family == famnum) return fam;
            gl = gl->next;
      }

      return NULL;
}

int aim_get_buddyname( guchar *name, tvbuff_t *tvb, int len_offset, int name_offset)
{
  guint8 buddyname_length;

  buddyname_length = tvb_get_guint8(tvb, len_offset);

  if(buddyname_length > MAX_BUDDYNAME_LENGTH ) buddyname_length = MAX_BUDDYNAME_LENGTH;
  tvb_get_nstringz0(tvb, name_offset, buddyname_length + 1, name);

  return buddyname_length;
}


void aim_get_message( guchar *msg, tvbuff_t *tvb, int msg_offset, int msg_length)
{
  int i,j,c;
  int bracket = FALSE;
  int max, tagchars = 0;
  int new_offset = msg_offset;
  int new_length = msg_length;



  /* make sure nothing bigger than 1000 bytes is printed */
  if( msg_length > 999 ) return;

  memset( msg, '\0', 1000);
  i = 0;
  c = 0;

  /* loop until HTML tag is reached - quick&dirty way to find start of message
   * (it is nearly impossible to find the correct start offset for all client versions) */
  while( (tagchars < 6) && (new_length > 5) )
  {
     j = tvb_get_guint8(tvb, new_offset);
     if( ( (j == '<') && (tagchars == 0) ) ||
         ( (j == 'h') && (tagchars == 1) ) ||
         ( (j == 'H') && (tagchars == 1) ) ||
         ( (j == 't') && (tagchars == 2) ) ||
         ( (j == 'T') && (tagchars == 2) ) ||
         ( (j == 'm') && (tagchars == 3) ) ||
         ( (j == 'M') && (tagchars == 3) ) ||
         ( (j == 'l') && (tagchars == 4) ) ||
         ( (j == 'L') && (tagchars == 4) ) ||
         ( (j == '>') && (tagchars == 5) ) ) tagchars++;
     new_offset++;
     new_length--;
  }

  /* set offset and length of message to after the first HTML tag */
  msg_offset = new_offset;
  msg_length = new_length;
  max = msg_length - 1;
  tagchars = 0;

  /* find the rest of the message until either a </html> is reached or the end of the frame.
   * All other HTML tags are stripped to display only the raw message (printable characters) */
  while( (c < max) && (tagchars < 7) )
  {
     j = tvb_get_guint8(tvb, msg_offset+c);


     /* make sure this is an HTML tag by checking the order of the chars */
     if( ( (j == '<') && (tagchars == 0) ) ||
         ( (j == '/') && (tagchars == 1) ) ||
         ( (j == 'h') && (tagchars == 2) ) ||
         ( (j == 'H') && (tagchars == 2) ) ||
         ( (j == 't') && (tagchars == 3) ) ||
         ( (j == 'T') && (tagchars == 3) ) ||
         ( (j == 'm') && (tagchars == 4) ) ||
         ( (j == 'M') && (tagchars == 4) ) ||
         ( (j == 'l') && (tagchars == 5) ) ||
         ( (j == 'L') && (tagchars == 5) ) ||
         ( (j == '>') && (tagchars == 6) ) ) tagchars++;

#ifdef STRIP_TAGS
     if( j == '<' ) bracket = TRUE;
     if( j == '>' ) bracket = FALSE;
     if( (isprint(j) ) && (bracket == FALSE) && (j != '>'))
#else
     if( isprint(j) )
#endif
     {
       msg[i] = j;
       i++;
     }
     c++;
  }
}

void aim_init_family(int proto, int ett, guint16 family, const aim_subtype *subtypes) 
{
      aim_family *fam = g_new(aim_family, 1);
      fam->proto = find_protocol_by_id(proto);
      fam->name = proto_get_protocol_short_name(fam->proto);
      fam->family = family;
      fam->subtypes = subtypes;
      families = g_list_append(families, fam);

      fam->proto_id = proto;
      fam->ett = ett;
}

static void dissect_aim_newconn(tvbuff_t *tvb, packet_info *pinfo, 
                        int offset, proto_tree *tree)
{
  if (check_col(pinfo->cinfo, COL_INFO)) 
    col_set_str(pinfo->cinfo, COL_INFO, "New Connection");

  if (tvb_length_remaining(tvb, offset) > 0) {
        proto_tree_add_item(tree, hf_aim_version, tvb, offset, 4, FALSE);
        offset+=4;
        offset = dissect_aim_tlv_sequence(tvb, pinfo, offset, tree, client_tlvs);
  }

  if (tvb_length_remaining(tvb, offset) > 0)
    proto_tree_add_item(tree, hf_aim_data, tvb, offset, -1, FALSE);
}


int dissect_aim_snac_error(tvbuff_t *tvb, packet_info *pinfo, 
                       proto_tree *aim_tree)
{
  const char *name;

  if ((name = match_strval(tvb_get_ntohs(tvb, 0), aim_snac_errors)) != NULL) {
     if (check_col(pinfo->cinfo, COL_INFO))
            col_add_str(pinfo->cinfo, COL_INFO, name);
  }

  proto_tree_add_item (aim_tree, hf_aim_snac_error,
                     tvb, 0, 2, FALSE);
  
  return dissect_aim_tlv_sequence(tvb, pinfo, 2, aim_tree, client_tlvs);
}

int dissect_aim_ssi_result(tvbuff_t *tvb, packet_info *pinfo,
                       proto_tree *aim_tree)
{
  const char *name;

  if ((name = match_strval(tvb_get_ntohs(tvb, 0), aim_ssi_result_codes)) != NULL) {
     if (check_col(pinfo->cinfo, COL_INFO))
            col_add_str(pinfo->cinfo, COL_INFO, name);
  }

  proto_tree_add_item (aim_tree, hf_aim_ssi_result_code,
                     tvb, 0, 2, FALSE);

  return 2;
}

int dissect_aim_userinfo(tvbuff_t *tvb, packet_info *pinfo, 
                         int offset, proto_tree *tree) 
{
    offset = dissect_aim_buddyname(tvb, pinfo, offset, tree);

    proto_tree_add_item(tree, hf_aim_userinfo_warninglevel, tvb, offset, 2, FALSE);
    offset += 2;

    return dissect_aim_tlv_list(tvb, pinfo, offset, tree, onlinebuddy_tlvs);
}

static int dissect_aim_fnac_flags(tvbuff_t *tvb, int offset, int len, proto_item *ti, guint16 flags)
{
      proto_tree *entry = proto_item_add_subtree(ti, ett_aim_fnac_flags);
      proto_tree_add_boolean(entry, hf_aim_fnac_flag_next_is_related, tvb, offset, len, flags);
      proto_tree_add_boolean(entry, hf_aim_fnac_flag_contains_version, tvb, offset, len, flags);
      return offset + len;
}

static void dissect_aim_snac(tvbuff_t *tvb, packet_info *pinfo, 
                       int offset, proto_tree *aim_tree, proto_tree *root_tree)
{
  guint16 family_id;
  guint16 subtype_id;
  guint16 flags;
  guint32 id;
  proto_item *ti1;
  struct aiminfo aiminfo;
  proto_tree *aim_tree_fnac = NULL;
  tvbuff_t *subtvb;
  int orig_offset;
  const aim_subtype *subtype;
  proto_tree *family_tree = NULL;
  const aim_family *family;
  void* pd_save;

  orig_offset = offset;
  family_id = tvb_get_ntohs(tvb, offset);
  family = aim_get_family(family_id);
  offset += 2;
  subtype_id = tvb_get_ntohs(tvb, offset);
  subtype = aim_get_subtype(family_id, subtype_id);
  offset += 2;
  flags = tvb_get_ntohs(tvb, offset);
  offset += 2;
  id = tvb_get_ntohl(tvb, offset);
  offset += 4;
  
 
  if( aim_tree )
    {
      offset = orig_offset;
      ti1 = proto_tree_add_text(aim_tree, tvb, 6, 10, "FNAC: Family: %s (0x%04x), Subtype: %s (0x%04x)",
                          family?family->name:"Unknown", family_id,
                          (subtype && subtype->name)?subtype->name:"Unknown", subtype_id);
      aim_tree_fnac = proto_item_add_subtree(ti1, ett_aim_fnac);

      proto_tree_add_text (aim_tree_fnac, 
                     tvb, offset, 2, "Family: %s (0x%04x)", family?family->name:"Unknown", family_id);
      offset += 2;

      proto_tree_add_text (aim_tree_fnac, 
                     tvb, offset, 2, "Subtype: %s (0x%04x)", (subtype && subtype->name)?subtype->name:"Unknown", subtype_id);
      offset += 2;

      ti1 = proto_tree_add_uint(aim_tree_fnac, hf_aim_fnac_flags, tvb, offset, 
                    2, flags);

        offset = dissect_aim_fnac_flags(tvb, offset, 2, ti1, flags);

      proto_tree_add_uint(aim_tree_fnac, hf_aim_fnac_id, tvb, offset,
                    4, id);
      offset += 4;
    }
  
  if(flags & FNAC_FLAG_CONTAINS_VERSION) {
      guint16 len = tvb_get_ntohs(tvb, offset); 
      int oldoffset;
      offset+=2;
      oldoffset = offset;
      
      while(offset < oldoffset + len) {
        offset = dissect_aim_tlv(tvb, pinfo, offset, aim_tree, fnac_tlvs);
      }
  }

  subtvb = tvb_new_subset(tvb, offset, -1, -1);
  aiminfo.tcpinfo = pinfo->private_data;
  aiminfo.family = family_id;
  aiminfo.subtype = subtype_id;
  pd_save = pinfo->private_data;
  pinfo->private_data = &aiminfo;

  if (check_col(pinfo->cinfo, COL_PROTOCOL) && family) {
      col_set_str(pinfo->cinfo, COL_PROTOCOL, family->name);
  }
  
  if (check_col(pinfo->cinfo, COL_INFO)) {
       if(subtype && family) {
             col_set_str(pinfo->cinfo, COL_INFO, family->name);
             col_append_fstr(pinfo->cinfo, COL_INFO, ", %s", subtype->name);
       } else {
          col_set_str(pinfo->cinfo, COL_INFO, "SNAC data");
        
      if(family) col_append_fstr(pinfo->cinfo, COL_INFO, ", %s", family->name);
            else col_append_fstr(pinfo->cinfo, COL_INFO, ", Family: 0x%04x", family_id);

            col_append_fstr(pinfo->cinfo, COL_INFO, ", Subtype: 0x%04x", subtype_id);
       }
  }

  if(aim_tree && family) 
  {
      proto_item *ti = proto_tree_add_item(root_tree, family->proto_id, subtvb, 0, -1, FALSE); 
      family_tree = proto_item_add_subtree(ti, family->ett);
      if(subtype) proto_item_append_text(ti, ", %s", subtype->name);
  }

  if(tvb_length_remaining(tvb, offset) > 0 && subtype && subtype->dissector) {
        subtype->dissector(subtvb, pinfo, family_tree);      
  }
  pinfo->private_data = pd_save;
}

static void dissect_aim_flap_err(tvbuff_t *tvb, packet_info *pinfo, 
                         int offset, proto_tree *tree)
{
  if (check_col(pinfo->cinfo, COL_INFO)) {
    col_set_str(pinfo->cinfo, COL_INFO, "FLAP error");
  }

  /* Show the undissected payload */
  if (tvb_length_remaining(tvb, offset) > 0)
    proto_tree_add_item(tree, hf_aim_data, tvb, offset, -1, FALSE);
}

static void dissect_aim_keep_alive(tvbuff_t *tvb, packet_info *pinfo, 
                           int offset, proto_tree *tree)
{
  if (check_col(pinfo->cinfo, COL_INFO)) {
    col_set_str(pinfo->cinfo, COL_INFO, "Keep Alive");
  }

  /* Show the undissected payload */
  if (tvb_length_remaining(tvb, offset) > 0)
    proto_tree_add_item(tree, hf_aim_data, tvb, offset, -1, FALSE);
}

static void dissect_aim_close_conn(tvbuff_t *tvb, packet_info *pinfo, 
                           int offset, proto_tree *tree)
{
  if (check_col(pinfo->cinfo, COL_INFO)) {
    col_set_str(pinfo->cinfo, COL_INFO, "Close Connection");
  }     
  
  offset = dissect_aim_tlv_sequence(tvb, pinfo, offset, tree, client_tlvs);
}

static void dissect_aim_unknown_channel(tvbuff_t *tvb, packet_info *pinfo, 
                              int offset, proto_tree *tree)
{
  if (check_col(pinfo->cinfo, COL_INFO)) {
    col_set_str(pinfo->cinfo, COL_INFO, "Unknown Channel");
  }

  /* Show the undissected payload */
  if (tvb_length_remaining(tvb, offset) > 0)
    proto_tree_add_item(tree, hf_aim_data, tvb, offset, -1, FALSE);
}

int dissect_aim_buddyname(tvbuff_t *tvb, packet_info *pinfo _U_, int offset,
                       proto_tree *tree)
{
  guint8 buddyname_length = 0;
  proto_item *ti = NULL;
  proto_tree *buddy_tree = NULL;

  buddyname_length = tvb_get_guint8(tvb, offset);
  offset++;

  if(tree) {
      ti = proto_tree_add_text(tree, tvb, offset-1, 1+buddyname_length,
                               "Buddy: %s",
                               tvb_format_text(tvb, offset, buddyname_length));
      buddy_tree = proto_item_add_subtree(ti, ett_aim_buddyname);
      proto_tree_add_item(buddy_tree, hf_aim_buddyname_len, tvb, offset-1, 1, FALSE);
      proto_tree_add_item(buddy_tree, hf_aim_buddyname, tvb, offset, buddyname_length, FALSE);
  }

   return offset+buddyname_length;
}

typedef struct _aim_client_capability
{
      const char *name;
      e_uuid_t clsid;   
} aim_client_capability;

static const aim_client_capability known_client_caps[] = {
      { "Send File", 
        {0x09461343, 0x4c7f, 0x11d1,
          { 0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "Recv File",
          { 0x09461348, 0x4c7f, 0x11d1,
               { 0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},
      
      { "Short Caps",
       {0x09460000, 0x4c7f, 0x11d1, 
         { 0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "Secure IM",
       {0x09460001, 0x4c7f, 0x11d1, 
         { 0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "XHTML IM",
       {0x09460002, 0x4c7f, 0x11d1, 
         { 0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "Video Chat",
       {0x09460100, 0x4c7f, 0x11d1, 
         { 0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "Live Video",
       {0x09460101, 0x4c7f, 0x11d1, 
         { 0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "Camera",
       {0x09460102, 0x4c7f, 0x11d1, 
         { 0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "Microphone",
       {0x09460103, 0x4c7f, 0x11d1, 
         { 0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "Live Audio",
       {0x09460104, 0x4c7f, 0x11d1, 
         { 0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "iChatAV info",
       {0x09460105, 0x4c7f, 0x11d1, 
         { 0x82, 0x22, 0x44, 0x45, 0x45, 0x53, 0x54, 0x00}}},

      { "Host Status Text Aware",
       {0x0946010A, 0x4c7f, 0x11d1, 
         { 0x82, 0x22, 0x44, 0x45, 0x45, 0x53, 0x54, 0x00}}},

      { "Realtime IM",
       {0x0946010B, 0x4c7f, 0x11d1, 
         { 0x82, 0x22, 0x44, 0x45, 0x45, 0x53, 0x54, 0x00}}},

      { "Smart Caps",
       {0x094601FF, 0x4c7f, 0x11d1, 
         { 0x82, 0x22, 0x44, 0x45, 0x45, 0x53, 0x54, 0x00}}},

      { "Hiptop",
       {0x09461323, 0x4c7f, 0x11d1, 
         { 0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "Voice Chat",
       {0x09461341, 0x4c7f, 0x11d1, 
             { 0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "File Transfer",
       {0x09461343, 0x4c7f, 0x11d1, 
             {0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "Direct ICQ Communication",
       {0x09461344, 0x4c7f, 0x11d1, 
             {0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "Direct ICBM",
       {0x09461345, 0x4c7f, 0x11d1, 
             {0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "Buddy Icon",
       {0x09461346, 0x4c7f, 0x11d1, 
             {0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "Add-Ins",
       {0x09461347, 0x4c7f, 0x11d1,
             {0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "File Sharing",
       {0x09461348, 0x4c7f, 0x11d1,
             {0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "ICQ Server Relaying",
       {0x09461349, 0x4c7f, 0x11d1,
             {0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "Games",
       {0x0946134a, 0x4c7f, 0x11d1,
             {0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},
      
      { "Games",
       {0x0946134a, 0x4c7f, 0x11d1,
             {0x22, 0x82, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "Send Buddy List",
       {0x0946134b, 0x4c7f, 0x11d1,
             {0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "AIM/ICQ Interoperability",
       {0x0946134d, 0x4c7f, 0x11d1,
             {0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "ICQ UTF8 Support",
       {0x0946134e, 0x4c7f, 0x11d1,
             {0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "Old ICQ UTF8 Support",
       {0x2e7a6475, 0xfadf, 0x4dc8,
             {0x88, 0x6f, 0xea, 0x35, 0x95, 0xfd, 0xb6, 0xdf}}},

      { "Chat",
       {0x748f2420, 0x6287, 0x11d1, 
             {0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},

      { "ICQ Rich Text Format Messages",
       {0x97b12751, 0x243c, 0x4334,
             {0xad, 0x22, 0xd6, 0xab, 0xf7, 0x3f, 0x14, 0x92}}},

      { "AP User", 
       {0xaa4a32b5, 0xf884, 0x48c6,
             {0xa3, 0xd7, 0x8c, 0x50, 0x97, 0x19, 0xfd, 0x5b}}},

      { "Trillian Encryption",
       {0xf2e7c7f4, 0xfead, 0x4dfb,
             {0xb2, 0x35, 0x36, 0x79, 0x8b, 0xdf, 0x00, 0x00}}},

      { NULL, {0x0, 0x0, 0x0, { 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 } } }
};

static const aim_client_capability *aim_find_capability ( e_uuid_t clsid)
{
      int i;

      for(i = 0; known_client_caps[i].name; i++) 
      {
            const aim_client_capability *caps = &(known_client_caps[i]);

            if(memcmp(&(caps->clsid), &clsid, sizeof(e_uuid_t)) == 0)
                  return caps;
      }

      return NULL;
}

int dissect_aim_capability(proto_tree *entry, tvbuff_t *tvb, int offset)
{
      const aim_client_capability *caps = NULL;
      e_uuid_t clsid;

      clsid.Data1 = tvb_get_ntohl(tvb, offset);
      clsid.Data2 = tvb_get_ntohs(tvb, offset+4);
      clsid.Data3 = tvb_get_ntohs(tvb, offset+6);
      tvb_memcpy(tvb, clsid.Data4, offset+8, 8);

      caps = aim_find_capability(clsid);

      proto_tree_add_text(entry, tvb, offset, 16, 
            "%s {%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x}", 
            caps?caps->name:"Unknown", clsid.Data1, clsid.Data2, 
            clsid.Data3, clsid.Data4[0], clsid.Data4[1], clsid.Data4[2], 
            clsid.Data4[3], clsid.Data4[4],     clsid.Data4[5], clsid.Data4[6], 
                  clsid.Data4[7]
      );

      return offset+16;
}

int dissect_aim_tlv_value_client_capabilities(proto_item *ti _U_, guint16 valueid _U_, tvbuff_t *tvb, packet_info *pinfo _U_)
{
      int offset = 0;
      proto_tree *entry;

      proto_item_set_text(ti, "Client Capabilities List");

      entry = proto_item_add_subtree(ti, ett_aim_client_capabilities);
      
      while (tvb_length_remaining(tvb, offset) > 0) {
            offset = dissect_aim_capability(entry, tvb, offset);
      }

      return tvb_length(tvb);
}

int dissect_aim_tlv_value_time(proto_item *ti _U_, guint16 valueid _U_, tvbuff_t *tvb, packet_info *pinfo _U_)
{
      /* FIXME */
      return tvb_length(tvb);
}

int dissect_aim_userclass(tvbuff_t *tvb, int offset, int len, proto_item *ti, guint32 flags)
{
      proto_tree *entry;

      entry = proto_item_add_subtree(ti, ett_aim_userclass);
      proto_tree_add_boolean(entry, hf_aim_userclass_unconfirmed, tvb, offset, len, flags);
      proto_tree_add_boolean(entry, hf_aim_userclass_administrator, tvb, offset, len, flags);
      proto_tree_add_boolean(entry, hf_aim_userclass_aol, tvb, offset, len, flags);
      proto_tree_add_boolean(entry, hf_aim_userclass_commercial, tvb, offset, len, flags);
      proto_tree_add_boolean(entry, hf_aim_userclass_aim, tvb, offset, len, flags);
      proto_tree_add_boolean(entry, hf_aim_userclass_away, tvb, offset, len, flags);
      proto_tree_add_boolean(entry, hf_aim_userclass_icq, tvb, offset, len, flags);
      proto_tree_add_boolean(entry, hf_aim_userclass_wireless, tvb, offset, len, flags);
      proto_tree_add_boolean(entry, hf_aim_userclass_unknown100, tvb, offset, len, flags);
      proto_tree_add_boolean(entry, hf_aim_userclass_imf, tvb, offset, len, flags);
      proto_tree_add_boolean(entry, hf_aim_userclass_bot, tvb, offset, len, flags);
      proto_tree_add_boolean(entry, hf_aim_userclass_unknown800, tvb, offset, len, flags);
      proto_tree_add_boolean(entry, hf_aim_userclass_one_way_wireless, tvb, offset, len, flags);
      proto_tree_add_boolean(entry, hf_aim_userclass_unknown2000, tvb, offset, len, flags);
      proto_tree_add_boolean(entry, hf_aim_userclass_unknown4000, tvb, offset, len, flags);
      proto_tree_add_boolean(entry, hf_aim_userclass_unknown8000, tvb, offset, len, flags);
      proto_tree_add_boolean(entry, hf_aim_userclass_unknown10000, tvb, offset, len, flags);
      proto_tree_add_boolean(entry, hf_aim_userclass_unknown20000, tvb, offset, len, flags);
      proto_tree_add_boolean(entry, hf_aim_userclass_no_knock_knock, tvb, offset, len, flags);
      proto_tree_add_boolean(entry, hf_aim_userclass_forward_mobile, tvb, offset, len, flags);
      return offset+len;
}

int dissect_aim_tlv_value_userclass(proto_item *ti, guint16 valueid _U_, tvbuff_t *tvb, packet_info *pinfo _U_)
{
      guint16 value16 = tvb_get_ntohs(tvb, 0);
      proto_item_set_text(ti, "Value: 0x%04x", value16);
      return dissect_aim_userclass(tvb, 0, 2, ti, value16);
}

static int dissect_aim_tlv_value_userstatus(proto_item *ti _U_, guint16 valueid _U_, tvbuff_t *tvb, packet_info *pinfo _U_)
{
      /* FIXME */
      return tvb_length(tvb);
}

static int dissect_aim_tlv_value_dcinfo(proto_item *ti, guint16 valueid _U_, tvbuff_t *tvb, packet_info *pinfo _U_)
{
      int offset = 0;
      
      proto_tree *dctree = proto_item_add_subtree(ti, ett_aim_dcinfo);
      
      proto_tree_add_item(dctree, hf_aim_dcinfo_ip , tvb, offset, 4, FALSE); offset+=4;
      proto_tree_add_item(dctree, hf_aim_dcinfo_tcpport, tvb, offset, 4, FALSE); offset+=4;
      proto_tree_add_item(dctree, hf_aim_dcinfo_type, tvb, offset, 1, FALSE); offset+=1;
      proto_tree_add_item(dctree, hf_aim_dcinfo_proto_version, tvb, offset, 2, FALSE); offset+=2;
      proto_tree_add_item(dctree, hf_aim_dcinfo_auth_cookie, tvb, offset, 4, FALSE); offset+=2;
      proto_tree_add_item(dctree, hf_aim_dcinfo_webport, tvb, offset, 4, FALSE); offset+=4;
      proto_tree_add_item(dctree, hf_aim_dcinfo_client_future, tvb, offset, 4, FALSE); offset+=4;
      proto_tree_add_item(dctree, hf_aim_dcinfo_last_info_update, tvb, offset, 4, FALSE); offset+=4;
      proto_tree_add_item(dctree, hf_aim_dcinfo_last_ext_info_update, tvb, offset, 4, FALSE); offset+=4;
      proto_tree_add_item(dctree, hf_aim_dcinfo_last_ext_status_update, tvb, offset, 4, FALSE); offset+=4;
      proto_tree_add_item(dctree, hf_aim_dcinfo_unknown, tvb, offset, 2, FALSE); offset+=2;

      return offset;
}

int dissect_aim_tlv_value_string (proto_item *ti, guint16 valueid _U_, tvbuff_t *tvb, packet_info *pinfo _U_)
{
   guint8 *buf;
   gint string_len;

   string_len = tvb_length(tvb);
   buf = tvb_get_ephemeral_string(tvb, 0, string_len);
   proto_item_set_text(ti, "Value: %s", format_text(buf, string_len));
   return string_len;
}

int dissect_aim_tlv_value_string08_array (proto_item *ti, guint16 valueid _U_, tvbuff_t *tvb, packet_info *pinfo _U_)
{
  proto_tree *entry;
  gint offset=0;

  entry = proto_item_add_subtree(ti, ett_aim_string08_array);

  while (tvb_length_remaining(tvb, offset) > 1)
  {
    guint8 string_len = tvb_get_guint8(tvb, offset++);
    guint8 *buf = tvb_get_ephemeral_string(tvb, offset, string_len);
    proto_tree_add_text(entry, tvb, offset, string_len, "%s", format_text(buf, string_len));
    offset += string_len;
  }

  return offset;
}

int dissect_aim_tlv_value_bytes (proto_item *ti _U_, guint16 valueid _U_, tvbuff_t *tvb _U_, packet_info *pinfo _U_)
{
   return tvb_length(tvb);
}

int dissect_aim_tlv_value_uint8 (proto_item *ti, guint16 valueid _U_, tvbuff_t *tvb, packet_info *pinfo _U_){
  guint8 value8 = tvb_get_guint8(tvb, 0);
  proto_item_set_text(ti, "Value: %d", value8);
  return 1;
}

int dissect_aim_tlv_value_uint16 (proto_item *ti, guint16 valueid _U_, tvbuff_t *tvb, packet_info *pinfo _U_){
  guint16 value16 = tvb_get_ntohs(tvb, 0);
  proto_item_set_text(ti, "Value: %d", value16);
  return 2;
}

int dissect_aim_tlv_value_ipv4 (proto_item *ti, guint16 valueid _U_, tvbuff_t *tvb, packet_info *pinfo _U_){
  guint32 ipv4_address = tvb_get_ipv4(tvb, 0);
  proto_item_set_text(ti, "Value: %s", ip_to_str((guint8 *)&ipv4_address));
  return 4;
}

int dissect_aim_tlv_value_uint32 (proto_item *ti, guint16 valueid _U_, tvbuff_t *tvb, packet_info *pinfo _U_){
  guint32 value32 = tvb_get_ntohl(tvb, 0);
  proto_item_set_text(ti, "Value: %d", value32);
  return 4;
}

int dissect_aim_tlv_value_messageblock (proto_item *ti, guint16 valueid _U_, tvbuff_t *tvb, packet_info *pinfo _U_){
  proto_tree *entry;
  guint8 *buf;
  guint16 featurelen;
  guint16 blocklen;
  int offset=0;

  /* Setup a new subtree */
  entry = proto_item_add_subtree(ti, ett_aim_messageblock);

  /* Features descriptor */
  proto_tree_add_item(entry, hf_aim_messageblock_featuresdes, tvb, offset, 2,
                  FALSE);
  offset += 2;

  /* Features Length */
  featurelen = tvb_get_ntohs(tvb, offset);
  proto_tree_add_item(entry, hf_aim_messageblock_featureslen, tvb, offset, 2,
                  FALSE);
  offset += 2;

  /* Features (should be expanded further @@@@@@@ ) */
  proto_tree_add_item(entry, hf_aim_messageblock_features, tvb, offset, 
                  featurelen, FALSE);
  offset += featurelen;

  /* There can be multiple messages in this message block */
  while (tvb_length_remaining(tvb, offset) > 0) {
    /* Info field */
    proto_tree_add_item(entry, hf_aim_messageblock_info, tvb, offset, 2,
                  FALSE);
    offset += 2;
    
    /* Block length (includes charset and charsubset) */
    blocklen = tvb_get_ntohs(tvb, offset);
    if (blocklen <= 4) {
      proto_tree_add_text(entry, tvb, offset, 2, "Invalid block length: %d",
        blocklen);
      break;
    }
    proto_tree_add_item(entry, hf_aim_messageblock_len, tvb, offset, 2,
                  FALSE);
    offset += 2;
    
    /* Character set */
    proto_tree_add_item(entry, hf_aim_messageblock_charset, tvb, offset, 2,
                  FALSE);
    offset += 2;
    
    /* Character subset */
    proto_tree_add_item(entry, hf_aim_messageblock_charsubset, tvb, offset, 2,
                  FALSE);
    offset += 2;

    /* The actual message */
    buf = tvb_get_ephemeral_string(tvb, offset, blocklen - 4 );
    proto_item_set_text(ti, "Message: %s",
                        format_text(buf, blocklen - 4));
    proto_tree_add_item(entry, hf_aim_messageblock_message, tvb, offset, 
                  blocklen-4,
                  FALSE);
    offset += tvb_length_remaining(tvb, offset);
  }

  return offset;
}

/* Dissect a TLV value */
int dissect_aim_tlv(tvbuff_t *tvb, packet_info *pinfo _U_, 
                     int offset, proto_tree *tree, const aim_tlv *tlv)
{
  guint16 valueid;
  guint16 length;
  int i = 0;
  const aim_tlv *tmp;
  const char *desc;
  proto_item *ti1;
  proto_tree *tlv_tree;
  int orig_offset;

  /* Record the starting offset so we can reuse it at the second pass */
  orig_offset = offset;

  /* Get the value ID */
  valueid = tvb_get_ntohs(tvb, offset);
  offset += 2;

  /* Figure out which entry applies from the tlv list */
  tmp = tlv;
  while (tmp[i].valueid) {
    if (tmp[i].valueid == valueid) {
      /* We found a match */
      break;
    }
    i++;
  }

  /* At this point, we are either pointing at the correct record, or 
     we didn't find the record, and are pointing at the last item in the 
     list */

  length = tvb_get_ntohs(tvb, offset);
  offset += 2;
  offset += length;

  if (tree) {
    offset = orig_offset;

    if (tmp[i].desc != NULL)
      desc = tmp[i].desc;
    else
      desc = "Unknown";
    
    ti1 = proto_tree_add_text(tree, tvb, offset, length + 4, "TLV: %s", desc);

    tlv_tree = proto_item_add_subtree(ti1, ett_aim_tlv);

    proto_tree_add_text(tlv_tree, tvb, offset, 2,
                  "Value ID: %s (0x%04x)", desc, valueid);
    offset += 2;
    
    proto_tree_add_text(tlv_tree, tvb, offset, 2,
                  "Length: %d", length);
    offset += 2;

    ti1 = proto_tree_add_text(tlv_tree, tvb, offset, length,
                        "Value");
      
    if (tmp[i].dissector) {
      tmp[i].dissector(ti1, valueid, tvb_new_subset(tvb, offset, length, length), pinfo);
    } 

    offset += length;
  }

  /* Return the new length */
  return offset;
}

int dissect_aim_tlv_sequence(tvbuff_t *tvb, packet_info *pinfo, 
                                           int offset, proto_tree *tree, const aim_tlv *tlv_table)
{
      while (tvb_length_remaining(tvb, offset) > 0) {
            offset = dissect_aim_tlv(tvb, pinfo, offset, tree, tlv_table);
      }
      return offset;
}

int dissect_aim_tlv_list(tvbuff_t *tvb, packet_info *pinfo, 
                     int offset, proto_tree *tree, const aim_tlv *tlv_table)
{
    guint16 i, tlv_count = tvb_get_ntohs(tvb, offset);

    proto_tree_add_item(tree, hf_aim_tlvcount, tvb, offset, 2, FALSE);
    offset += 2;

    for(i = 0; i < tlv_count; i++) {
      offset = dissect_aim_tlv(tvb, pinfo, offset, tree, tlv_table);
    }
    return offset;
}

/* Register the protocol with Wireshark */
void
proto_register_aim(void)
{

/* Setup list of header fields */
  static hf_register_info hf[] = {
    { &hf_aim_cmd_start,
      { "Command Start", "aim.cmd_start", FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }
    },
    { &hf_aim_channel,
      { "Channel ID", "aim.channel", FT_UINT8, BASE_HEX, VALS(aim_flap_channels), 0x0, "", HFILL }
    },
    { &hf_aim_seqno,
      { "Sequence Number", "aim.seqno", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }
    },
      { &hf_aim_version,
        { "Protocol Version", "aim.version", FT_BYTES, BASE_DEC, NULL, 0x0, "", HFILL },
      },
    { &hf_aim_data_len,
      { "Data Field Length", "aim.datalen", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }
    },
    { &hf_aim_data,
      { "Data", "aim.data", FT_BYTES, BASE_NONE, NULL, 0x0, "", HFILL }
    },
    { &hf_aim_signon_challenge_len,
      { "Signon challenge length", "aim.signon.challengelen", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }
    },
    { &hf_aim_signon_challenge,
      { "Signon challenge", "aim.signon.challenge", FT_STRING, BASE_NONE, NULL, 0x0, "", HFILL }
    },
    { &hf_aim_fnac_family,
      { "FNAC Family ID", "aim.fnac.family", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL }
    },
    { &hf_aim_fnac_subtype,
      { "FNAC Subtype ID", "aim.fnac.subtype", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL }
    },
    { &hf_aim_fnac_flags,
      { "FNAC Flags", "aim.fnac.flags", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL }
    },
    { &hf_aim_fnac_id,
      { "FNAC ID", "aim.fnac.id", FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL }
    },
    { &hf_aim_infotype,
      { "Infotype", "aim.infotype", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL }
    },
    { &hf_aim_buddyname_len,
      { "Buddyname len", "aim.buddynamelen", FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }
    },
    { &hf_aim_buddyname,
      { "Buddy Name", "aim.buddyname", FT_STRING, BASE_NONE, NULL, 0x0, "", HFILL }
    },
    { &hf_aim_tlvcount,
      { "TLV Count", "aim.tlvcount", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL },
    },
      { &hf_aim_snac_error,
        { "SNAC Error", "aim.snac.error", FT_UINT16, BASE_HEX, VALS(aim_snac_errors), 0x0, "", HFILL },
      },
      { &hf_aim_userclass_unconfirmed,
            { "AOL Unconfirmed account flag", "aim.userclass.unconfirmed", FT_BOOLEAN, 32, TFS(&flags_set_truth), CLASS_UNCONFIRMED, "", HFILL },
      },
      { &hf_aim_userclass_administrator,
            { "AOL Administrator flag", "aim.userclass.administrator", FT_BOOLEAN, 32, TFS(&flags_set_truth), CLASS_ADMINISTRATOR, "", HFILL },
      },
      { &hf_aim_userclass_aol,
            { "AOL Staff User Flag", "aim.userclass.staff", FT_BOOLEAN, 32, TFS(&flags_set_truth), CLASS_AOL, "", HFILL },
      },
      { &hf_aim_userclass_commercial,
            { "AOL commercial account flag", "aim.userclass.commercial", FT_BOOLEAN, 32, TFS(&flags_set_truth), CLASS_COMMERCIAL, "", HFILL },
      },
      { &hf_aim_userclass_aim,
            { "AIM user flag", "aim.userclass.free", FT_BOOLEAN, 32, TFS(&flags_set_truth), CLASS_AIM, "", HFILL },
      },
      { &hf_aim_userclass_away,
            { "AOL away status flag", "aim.userclass.away", FT_BOOLEAN, 32, TFS(&flags_set_truth), CLASS_AWAY, "", HFILL },
      },
      { &hf_aim_userclass_icq,
            { "ICQ user sign", "aim.userclass.icq", FT_BOOLEAN, 32, TFS(&flags_set_truth), CLASS_ICQ, "", HFILL },
      },
      { &hf_aim_userclass_wireless,
            { "AOL wireless user", "aim.userclass.wireless", FT_BOOLEAN, 32, TFS(&flags_set_truth), CLASS_WIRELESS, "", HFILL },
      },
      { &hf_aim_userclass_unknown100,
            { "Unknown bit", "aim.userclass.unknown100", FT_BOOLEAN, 32, TFS(&flags_set_truth), CLASS_UNKNOWN100, "", HFILL },
      },
      { &hf_aim_userclass_imf,
            { "Using IM Forwarding", "aim.userclass.imf", FT_BOOLEAN, 32, TFS(&flags_set_truth), CLASS_IMF, "", HFILL },
      },
      { &hf_aim_userclass_bot,
            { "Bot User", "aim.userclass.bot", FT_BOOLEAN, 32, TFS(&flags_set_truth), CLASS_BOT, "", HFILL },
      },
      { &hf_aim_userclass_unknown800,
            { "Unknown bit", "aim.userclass.unknown800", FT_BOOLEAN, 32, TFS(&flags_set_truth), CLASS_UNKNOWN800, "", HFILL },
      },
      { &hf_aim_userclass_one_way_wireless,
            { "One Way Wireless Device", "aim.userclass.one_way_wireless", FT_BOOLEAN, 32, TFS(&flags_set_truth), CLASS_ONE_WAY_WIRELESS, "", HFILL },
      },
      { &hf_aim_userclass_unknown2000,
            { "Unknown bit", "aim.userclass.unknown2000", FT_BOOLEAN, 32, TFS(&flags_set_truth), CLASS_UNKNOWN2000, "", HFILL },
      },
      { &hf_aim_userclass_unknown4000,
            { "Unknown bit", "aim.userclass.unknown4000", FT_BOOLEAN, 32, TFS(&flags_set_truth), CLASS_UNKNOWN4000, "", HFILL },
      },
      { &hf_aim_userclass_unknown8000,
            { "Unknown bit", "aim.userclass.unknown8000", FT_BOOLEAN, 32, TFS(&flags_set_truth), CLASS_UNKNOWN8000, "", HFILL },
      },
      { &hf_aim_userclass_unknown10000,
            { "Unknown bit", "aim.userclass.unknown10000", FT_BOOLEAN, 32, TFS(&flags_set_truth), CLASS_UNKNOWN10000, "", HFILL },
      },
      { &hf_aim_userclass_unknown20000,
            { "Unknown bit", "aim.userclass.unknown20000", FT_BOOLEAN, 32, TFS(&flags_set_truth), CLASS_UNKNOWN20000, "", HFILL },
      },
      { &hf_aim_userclass_no_knock_knock,
            { "Do not display the 'not on Buddy List' knock-knock", "aim.userclass.no_knock_knock", FT_BOOLEAN, 32, TFS(&flags_set_truth), CLASS_NO_KNOCK_KNOCK, "", HFILL },
      },
      { &hf_aim_userclass_forward_mobile,
            { "Forward to mobile if not active", "aim.userclass.forward_mobile", FT_BOOLEAN, 32, TFS(&flags_set_truth), CLASS_FORWARD_MOBILE, "", HFILL },
      },
      { &hf_aim_fnac_flag_next_is_related,
            { "Followed By SNAC with related information", "aim.fnac.flags.next_is_related", FT_BOOLEAN, 16, TFS(&flags_set_truth), FNAC_FLAG_NEXT_IS_RELATED, "", HFILL },
      },
      { &hf_aim_fnac_flag_contains_version,
            { "Contains Version of Family this SNAC is in", "aim.fnac.flags.contains_version", FT_BOOLEAN, 16, TFS(&flags_set_truth), FNAC_FLAG_CONTAINS_VERSION, "", HFILL },
      },
      { &hf_aim_userinfo_warninglevel,
            { "Warning Level", "aim.userinfo.warninglevel", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL },
      },
    { &hf_aim_messageblock_featuresdes,
            { "Features", "aim.messageblock.featuresdes", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL },
      },
    { &hf_aim_messageblock_featureslen,
            { "Features Length", "aim.messageblock.featureslen", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL },
      },
    { &hf_aim_messageblock_features,
            { "Features", "aim.messageblock.features", FT_BYTES, BASE_NONE, NULL, 0x0, "", HFILL },
      },
    { &hf_aim_messageblock_info,
            { "Block info", "aim.messageblock.info", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL },
      },
    { &hf_aim_messageblock_len,
            { "Block length", "aim.messageblock.length", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL },
      },
    { &hf_aim_messageblock_charset,
            { "Block Character set", "aim.messageblock.charset", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL },
      },
    { &hf_aim_messageblock_charsubset,
            { "Block Character subset", "aim.messageblock.charsubset", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL },
      },
    { &hf_aim_messageblock_message,
            { "Message", "aim.messageblock.message", FT_STRING, BASE_NONE, NULL, 0x0, "", HFILL },
      },
      { &hf_aim_dcinfo_ip,
            { "Internal IP address", "aim.dcinfo.addr", FT_IPv4, BASE_NONE, NULL, 0x0, "", HFILL },
      },
      { &hf_aim_dcinfo_tcpport,
            { "TCP Port", "aim.dcinfo.tcpport", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL },
      },
      { &hf_aim_dcinfo_type,
            { "Type", "aim.dcinfo.type", FT_UINT8, BASE_HEX, VALS(dc_types), 0x0, "", HFILL },
      },
      { &hf_aim_dcinfo_proto_version,
            { "Protocol Version", "aim.dcinfo.proto_version", FT_UINT16, BASE_DEC, VALS(protocol_versions), 0x0, "", HFILL },
      },
      { &hf_aim_dcinfo_auth_cookie,
            { "Authorization Cookie", "aim.dcinfo.auth_cookie", FT_BYTES, BASE_NONE, NULL, 0x0, "", HFILL },
      },
      { &hf_aim_dcinfo_webport,
            { "Web Front Port", "aim.dcinfo.webport", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL },
      },
      { &hf_aim_dcinfo_client_future,
            { "Client Futures", "aim.dcinfo.client_futures", FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL },
      },
      { &hf_aim_dcinfo_last_info_update,
            { "Last Info Update", "aim.dcinfo.last_info_update", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL },
      },
      { &hf_aim_dcinfo_last_ext_info_update,
            { "Last Extended Info Update", "aim.dcinfo.last_ext_info_update", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL },
      },
      { &hf_aim_dcinfo_last_ext_status_update,
            { "Last Extended Status Update", "aim.dcinfo.last_ext_status_update", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL },
      },
      { &hf_aim_dcinfo_unknown,
            { "Unknown", "aim.dcinfo.unknown", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL },
      },
      { &hf_aim_ssi_result_code,
        { "Last SSI operation result code", "aim.ssi.code", FT_UINT16, BASE_HEX, VALS(aim_ssi_result_codes), 0x0, "", HFILL },
      }
  };

  /* Setup protocol subtree array */
  static gint *ett[] = {
        &ett_aim,
        &ett_aim_dcinfo,
        &ett_aim_fnac,
        &ett_aim_fnac_flags,
        &ett_aim_tlv,
        &ett_aim_buddyname,
        &ett_aim_userclass,
        &ett_aim_messageblock,
        &ett_aim_client_capabilities,
        &ett_aim_string08_array
  };
  module_t *aim_module;

  /* Register the protocol name and description */
  proto_aim = proto_register_protocol("AOL Instant Messenger", "AIM", "aim");

/* Required function calls to register the header fields and subtrees used */
  proto_register_field_array(proto_aim, hf, array_length(hf));
  proto_register_subtree_array(ett, array_length(ett));

  aim_module = prefs_register_protocol(proto_aim, NULL);
  prefs_register_bool_preference(aim_module, "desegment",
    "Reassemble AIM messages spanning multiple TCP segments",
    "Whether the AIM 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.",
    &aim_desegment);

  subdissector_table = register_dissector_table("aim.family", "Family ID", FT_UINT16, BASE_HEX);
}

void
proto_reg_handoff_aim(void)
{
  dissector_handle_t aim_handle;

  aim_handle = new_create_dissector_handle(dissect_aim, proto_aim);
  dissector_add("tcp.port", TCP_PORT_AIM, aim_handle);
}

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