2001-10-11 16:01:10 +00:00
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/* packet-skinny.c
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*
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* Dissector for the Skinny Client Control Protocol
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* (The "D-Channel"-Protocol for Cisco Systems' IP-Phones)
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* Copyright 2001, Joerg Mayer (email: see AUTHORS file)
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*
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* This file is based on packet-aim.c, which is
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* Copyright 2000, Ralf Hoelzer <ralf@well.com>
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*
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2001-12-10 00:26:21 +00:00
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* $Id: packet-skinny.c,v 1.7 2001/12/10 00:25:34 guy Exp $
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2001-10-11 16:01:10 +00:00
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/* This implementation is based on a draft version of the 3.0
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* specification
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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/* REMOVE?
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* #include <stdio.h>
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* #include <stdlib.h>
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* #include <string.h>
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* #include <ctype.h>
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*
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* #ifdef HAVE_SYS_TYPES_H
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* # include <sys/types.h>
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* #endif
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*
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* #ifdef HAVE_NETINET_IN_H
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* # include <netinet/in.h>
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* #endif
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*
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* #include <glib.h> // already in packet.h -> tvbuff.h
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*
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* #ifdef NEED_SNPRINTF_H
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* # include "snprintf.h"
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* #endif
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*/
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#include "packet.h"
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/* REMOVE?
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* #include "strutil.h"
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*/
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#define TCP_PORT_SKINNY 2000
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/* I will probably need this again when I change things
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* to function pointers, but let me use the existing
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* infrastructure for now
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*
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* typedef struct {
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* guint32 id;
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* char * name;
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* } message_id_t;
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*/
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static const value_string message_id[] = {
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/* Station -> Callmanager */
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{0x0000, "KeepAliveMessage"},
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{0x0001, "RegisterMessage"},
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{0x0002, "IpPortMessage"},
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{0x0003, "KeypadButtonMessage"},
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{0x0004, "EnblocCallMessage"},
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{0x0005, "StimulusMessage"},
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{0x0006, "OffHookMessage"},
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{0x0007, "OnHookMessage"},
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{0x0008, "HookFlashMessage"},
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{0x0009, "ForwardStatReqMessage"},
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{0x000A, "SpeedDialStatReqMessage"},
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{0x000B, "LineStatReqMessage"},
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{0x000C, "ConfigStatReqMessage"},
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{0x000D, "TimeDateReqMessage"},
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{0x000E, "ButtonTemplateReqMessage"},
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{0x000F, "VersionReqMessage"},
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{0x0010, "CapabilitiesResMessage"},
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{0x0011, "MediaPortListMessage"},
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{0x0012, "ServerReqMessage"},
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{0x0020, "AlarmMessage"},
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{0x0021, "MulticastMediaReceptionAck"},
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{0x0022, "OpenReceiveChannelAck"},
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{0x0023, "ConnectionStatisticsRes"},
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{0x0024, "OffHookWithCgpnMessage"},
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{0x0025, "SoftKeySetReqMessage"},
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{0x0026, "SoftKeyEventMessage"},
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{0x0027, "UnregisterMessage"},
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{0x0028, "SoftKeyEventMessage"},
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{0x0029, "RegisterTokenReq"},
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/* Callmanager -> Station */
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/* 0x0000, 0x0003? */
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{0x0081, "RegisterAckMessage"},
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{0x0082, "StartToneMessage"},
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{0x0083, "StopToneMessage"},
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{0x0085, "SetRingerMessage"},
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{0x0086, "SetLampMessage"},
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{0x0087, "SetHkFDetectMessage"},
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{0x0088, "SetSpeakerModeMessage"},
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{0x0089, "SetMicroModeMessage"},
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{0x008A, "StartMediaTransmission"},
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{0x008B, "StopMediaTransmission"},
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{0x008C, "StartMediaReception"},
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{0x008D, "StopMediaReception"},
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{0x008F, "CallInfoMessage"},
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{0x0090, "ForwardStatMessage"},
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{0x0091, "SpeedDialStatMessage"},
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{0x0092, "LineStatMessage"},
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{0x0093, "ConfigStatMessage"},
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{0x0094, "DefineTimeDate"},
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{0x0095, "StartSessionTransmission"},
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{0x0096, "StopSessionTransmission"},
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{0x0097, "ButtonTemplateMessage"},
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{0x0098, "VersionMessage"},
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{0x0099, "DisplayTextMessage"},
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{0x009A, "ClearDisplay"},
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{0x009B, "CapabilitiesReqMessage"},
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{0x009C, "EnunciatorCommandMessage"},
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{0x009D, "RegisterRejectMessage"},
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{0x009E, "ServerResMessage"},
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{0x009F, "Reset"},
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{0x0100, "KeepAliveAckMessage"},
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{0x0101, "StartMulticastMediaReception"},
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{0x0102, "StartMulticastMediaTransmission"},
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{0x0103, "StopMulticastMediaReception"},
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{0x0104, "StopMulticastMediaTransmission"},
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{0x0105, "OpenReceiveChannel"},
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{0x0106, "CloseReceiveChannel"},
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{0x0107, "ConnectionStatisticsReq"},
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{0x0108, "SoftKeyTemplateResMessage"},
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{0x0109, "SoftKeySetResMessage"},
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{0x0110, "SelectSoftKeysMessage"},
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{0x0111, "CallStateMessage"},
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{0x0112, "DisplayPromptStatusMessage"},
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{0x0113, "ClearPromptStatusMessage"},
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{0x0114, "DisplayNotifyMessage"},
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{0x0115, "ClearNotifyMessage"},
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{0x0116, "ActivateCallPlaneMessage"},
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{0x0117, "DeactivateCallPlaneMessage"},
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{0x0118, "UnregisterAckMessage"},
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{0x0119, "BackSpaceReqMessage"},
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{0x011A, "RegisterTokenAck"},
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{0x011B, "RegisterTokenReject"},
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{0 , NULL} /* needed for value_string automagic */
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};
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static void dissect_skinny(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
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/* Initialize the protocol and registered fields */
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static int proto_skinny = -1;
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static int hf_skinny_data_length = -1;
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static int hf_skinny_reserved = -1;
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static int hf_skinny_messageid = -1;
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/* Initialize the subtree pointers */
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static gint ett_skinny = -1;
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2001-11-25 22:19:25 +00:00
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static dissector_handle_t data_handle;
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2001-10-11 16:01:10 +00:00
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/* Code to actually dissect the packets */
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static void dissect_skinny(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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/* The general structure of a packet: {IP-Header|TCP-Header|n*SKINNY}
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* SKINNY-Packet: {Header(Size, Reserved)|Data(MessageID, Message-Data)}
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*/
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/* Header fields */
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guint32 hdr_data_length;
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guint32 hdr_reserved;
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guint32 data_messageid;
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gchar *messageid_str;
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guint32 data_size;
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/* Set up structures we will need to add the protocol subtree and manage it */
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proto_item *ti;
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proto_tree *skinny_tree = NULL;
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/* check, if this is really an SKINNY packet, they start with a length + 0 */
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/* get relevant header information */
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hdr_data_length = tvb_get_letohl(tvb, 0);
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hdr_reserved = tvb_get_letohl(tvb, 4);
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data_messageid = tvb_get_letohl(tvb, 8);
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data_size = MIN(8+hdr_data_length, tvb_length(tvb)) - 0xC;
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/* hdr_data_length > 1024 is just a heuristic. Better values/checks welcome */
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if (hdr_data_length < 4 || hdr_data_length > 1024 || hdr_reserved != 0) {
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/* Not an SKINNY packet, just happened to use the same port */
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2001-11-25 22:19:25 +00:00
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call_dissector(data_handle,tvb, pinfo, tree);
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2001-10-11 16:01:10 +00:00
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return;
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}
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/* Make entries in Protocol column and Info column on summary display */
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2001-12-10 00:26:21 +00:00
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "SKINNY");
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2001-10-11 16:01:10 +00:00
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2001-12-10 00:26:21 +00:00
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if (check_col(pinfo->cinfo, COL_INFO))
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col_add_str(pinfo->cinfo, COL_INFO, "Skinny Client Control Protocol");
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2001-10-11 16:01:10 +00:00
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/* In the interest of speed, if "tree" is NULL, don't do any work not
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* necessary to generate protocol tree items. */
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if (tree) {
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ti = proto_tree_add_item(tree, proto_skinny, tvb, 0,
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data_size + 0xC, FALSE);
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skinny_tree = proto_item_add_subtree(ti, ett_skinny);
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proto_tree_add_uint(skinny_tree, hf_skinny_data_length, tvb,
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0, 4, hdr_data_length);
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proto_tree_add_uint(skinny_tree, hf_skinny_reserved, tvb,
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4, 4, hdr_reserved);
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}
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messageid_str = val_to_str(data_messageid, message_id, "0x%08X (Unknown)");
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2001-12-10 00:26:21 +00:00
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_add_str(pinfo->cinfo, COL_INFO, messageid_str);
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2001-10-11 16:01:10 +00:00
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}
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if (tree) {
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proto_tree_add_uint(skinny_tree, hf_skinny_messageid, tvb,
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8, 4, data_messageid /* FIXME: add messageid_str */ );
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if (data_size > 0) {
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proto_tree_add_protocol_format(skinny_tree, proto_skinny, tvb,
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0xC,
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data_size, "Data (%d byte%s)", data_size,
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plurality(data_size, "", "s"));
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}
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}
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/*FIXME: call dissect_skinny recursively until all data is used up */
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}
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/* Register the protocol with Ethereal */
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void
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proto_register_skinny(void)
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{
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/* Setup list of header fields */
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static hf_register_info hf[] = {
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{ &hf_skinny_data_length,
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{ "Data Length", "skinny.data_length",
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FT_UINT32, BASE_HEX, NULL, 0x0,
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"Number of bytes in the data portion.",
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HFILL }
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},
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{ &hf_skinny_reserved,
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{ "Reserved", "skinny.reserved",
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FT_UINT32, BASE_HEX, NULL, 0x0,
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"Reserved for furture(?) use.",
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HFILL }
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},
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/* FIXME: Enable use of message name ??? */
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{ &hf_skinny_messageid,
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{ "Message ID", "skinny.messageid",
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2001-10-11 16:04:36 +00:00
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FT_UINT32, BASE_HEX, VALS(message_id), 0x0,
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2001-10-11 16:01:10 +00:00
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"The function requested/done with this message.",
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HFILL }
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},
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};
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/* Setup protocol subtree array */
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static gint *ett[] = {
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&ett_skinny,
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};
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/* Register the protocol name and description */
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proto_skinny = proto_register_protocol("Skinny Client Control Protocol",
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"SKINNY", "skinny");
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/* Required function calls to register the header fields and subtrees used */
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proto_register_field_array(proto_skinny, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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};
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void
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proto_reg_handoff_skinny(void)
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{
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2001-12-03 04:00:26 +00:00
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dissector_handle_t skinny_handle;
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2001-11-25 22:19:25 +00:00
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data_handle = find_dissector("data");
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2001-12-03 04:00:26 +00:00
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skinny_handle = create_dissector_handle(dissect_skinny, proto_skinny);
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dissector_add("tcp.port", TCP_PORT_SKINNY, skinny_handle);
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2001-10-11 16:01:10 +00:00
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}
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