path: root/packet-mmse.c

/* packet-mmse.c
 * Routines for MMS Message Encapsulation dissection
 * Copyright 2001, Tom Uijldert <tom.uijldert@cmg.nl>
 * Copyright 2004, Olivier Biot
 *
 * $Id$
 *
 * 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.
 * ----------
 *
 * Dissector of an encoded Multimedia message PDU, as defined by the WAPForum
 * (http://www.wapforum.org) in "WAP-209-MMSEncapsulation-20020105-a".
 * Subsequent releases of MMS are in control of the Open Mobile Alliance (OMA):
 * Dissection of MMS 1.1 as in OMA-MMS-ENC-v1.1.
 * Dissection of MMS 1.2 as in OMA-MMS-ENC-v1.2 (not finished yet).
 */

/* This file has been edited with 8-space tabs and 4-space indentation */

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

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

#include <glib.h>

#include <epan/packet.h>
#include "packet-wap.h"
#include "packet-wsp.h"
/* #include "packet-mmse.h" */		/* We autoregister	*/

#define	MM_QUOTE		0x7F	/* Quoted string	*/

#define MMS_CONTENT_TYPE	0x3E	/* WINA-value for mms-message	*/

/* General-purpose debug logger.
 * Requires double parentheses because of variable arguments of printf().
 *
 * Enable debug logging for MMSE by defining AM_CFLAGS
 * so that it contains "-DDEBUG_mmse"
 */
#ifdef DEBUG_mmse
#define DebugLog(x) \
	printf("%s:%u: ", __FILE__, __LINE__); \
	printf x; \
	fflush(stdout)
#else
#define DebugLog(x) ;
#endif


/*
 * Forward declarations
 */
static void dissect_mmse_standalone(tvbuff_t *, packet_info *, proto_tree *);
static void dissect_mmse_encapsulated(tvbuff_t *, packet_info *, proto_tree *);
static void dissect_mmse(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
	guint8 pdut, char *message_type);

/*
 * Header field values
 */
/* MMS 1.0 */
#define MM_BCC_HDR		0x81	/* Bcc			*/
#define MM_CC_HDR		0x82	/* Cc			*/
#define MM_CLOCATION_HDR	0x83	/* X-Mms-Content-Location	*/
#define MM_CTYPE_HDR		0x84	/* Content-Type		*/
#define MM_DATE_HDR		0x85	/* Date				*/
#define MM_DREPORT_HDR		0x86	/* X-Mms-Delivery-Report	*/
#define MM_DTIME_HDR		0x87	/* X-Mms-Delivery-Time		*/
#define MM_EXPIRY_HDR		0x88	/* X-Mms-Expiry			*/
#define MM_FROM_HDR		0x89	/* From				*/
#define MM_MCLASS_HDR		0x8A	/* X-Mms-Message-Class		*/
#define MM_MID_HDR		0x8B	/* Message-ID			*/
#define MM_MTYPE_HDR		0x8C	/* X-Mms-Message-Type		*/
#define MM_VERSION_HDR		0x8D	/* X-Mms-MMS-Version		*/
#define MM_MSIZE_HDR		0x8E	/* X-Mms-Message-Size		*/
#define MM_PRIORITY_HDR		0x8F	/* X-Mms-Priority		*/
#define MM_RREPLY_HDR		0x90	/* X-Mms-Read-Reply		*/
#define MM_RALLOWED_HDR		0x91	/* X-Mms-Report-Allowed		*/
#define MM_RSTATUS_HDR		0x92	/* X-Mms-Response-Status	*/
#define MM_RTEXT_HDR		0x93	/* X-Mms-Response-Text		*/
#define MM_SVISIBILITY_HDR	0x94	/* X-Mms-Sender-Visibility	*/
#define MM_STATUS_HDR		0x95	/* X-Mms-Status			*/
#define MM_SUBJECT_HDR		0x96	/* Subject			*/
#define MM_TO_HDR		0x97	/* To				*/
#define MM_TID_HDR		0x98	/* X-Mms-Transaction-Id		*/
/* MMS 1.1 */
#define MM_RETRIEVE_STATUS_HDR	0x99	/* X-Mms-Retrieve-Status	*/
#define MM_RETRIEVE_TEXT_HDR	0x9A	/* X-Mms-Retrieve-Text		*/
#define MM_READ_STATUS_HDR	0x9B	/* X-Mms-Read-Status		*/
#define MM_REPLY_CHARGING_HDR	0x9C	/* X-Mms-Reply-Charging		*/
#define MM_REPLY_CHARGING_DEADLINE_HDR	\
				0x9D	/* X-Mms-Reply-Charging-Deadline*/
#define MM_REPLY_CHARGING_ID_HDR	\
				0x9E	/* X-Mms-Reply-Charging-ID	*/
#define MM_REPLY_CHARGING_SIZE_HDR	\
				0x9F	/* X-Mms-Reply-Charging-Size	*/
#define MM_PREV_SENT_BY_HDR	0xA0	/* X-Mms-Previously-Sent-By	*/
#define MM_PREV_SENT_DATE_HDR	0xA1	/* X-Mms-Previously-Sent-Date	*/
/* MMS 1.2 */
#define MM_STORE_HDR		0xA2	/* X-Mms-Store			*/
#define MM_MM_STATE_HDR		0xA3	/* X-Mms-MM-State		*/
#define MM_MM_FLAGS_HDR		0xA4	/* X-Mms-MM-Flags		*/
#define MM_STORE_STATUS_HDR	0xA5	/* X-Mms-Store-Status		*/
#define MM_STORE_STATUS_TEXT_HDR	\
				0xA6	/* X-Mms-Store-Status-Text	*/
#define MM_STORED_HDR		0xA7	/* X-Mms-Stored			*/
#define MM_ATTRIBUTES_HDR	0xA8	/* X-Mms-Attributes		*/
#define MM_TOTALS_HDR		0xA9	/* X-Mms-Totals			*/
#define MM_MBOX_TOTALS_HDR	0xAA	/* X-Mms-Mbox-Totals		*/
#define MM_QUOTAS_HDR		0xAB	/* X-Mms-Quotas			*/
#define MM_MBOX_QUOTAS_HDR	0xAC	/* X-Mms-Mbox-Quotas		*/
#define MM_MBOX_MSG_COUNT_HDR	0xAD	/* X-Mms-Message-Count		*/
#define MM_CONTENT_HDR		0xAE	/* Content			*/
#define MM_START_HDR		0xAF	/* X-Mms-Start			*/
#define MM_ADDITIONAL_HDR	0xB0	/* Additional-headers		*/
#define MM_DISTRIBUION_IND_HDR	0xB1	/* X-Mms-Distribution-Indcator	*/
#define MM_ELEMENT_DESCR_HDR	0xB2	/* X-Mms-Element-Descriptor	*/
#define MM_LIMIT_HDR		0xB3	/* X-Mms-Limit			*/

static const value_string vals_mm_header_names[] = {
	/* MMS 1.0 */
	{ MM_BCC_HDR,			"Bcc" },
	{ MM_CC_HDR,			"Cc" },
	{ MM_CLOCATION_HDR,		"X-Mms-Content-Location" },
	{ MM_CTYPE_HDR,			"X-Mms-Content-Type" },
	{ MM_DATE_HDR,			"Date" },
	{ MM_DREPORT_HDR,		"X-Mms-Delivery-Report" },
	{ MM_DTIME_HDR,			"X-Mms-Delivery-Time" },
	{ MM_EXPIRY_HDR,		"X-Mms-Expiry" },
	{ MM_FROM_HDR,			"From" },
	{ MM_MCLASS_HDR,		"X-Mms-Message-Class" },
	{ MM_MID_HDR,			"Message-ID" },
	{ MM_MTYPE_HDR,			"X-Mms-Message-Type" },
	{ MM_VERSION_HDR,		"X-Mms-MMS-Version" },
	{ MM_MSIZE_HDR,			"X-Mms-Message-Size" },
	{ MM_PRIORITY_HDR,		"X-Mms-Priority" },
	{ MM_RREPLY_HDR,		"X-Mms-Read-Reply" },
	{ MM_RALLOWED_HDR,		"X-Mms-Report-Allowed" },
	{ MM_RSTATUS_HDR,		"X-Mms-Response-Status" },
	{ MM_RTEXT_HDR,			"X-Mms-Response-Text" },
	{ MM_SVISIBILITY_HDR,		"X-Mms-Sender-Visibility" },
	{ MM_STATUS_HDR,		"X-Mms-Status" },
	{ MM_SUBJECT_HDR,		"Subject" },
	{ MM_TO_HDR,			"To" },
	{ MM_TID_HDR,			"X-Mms-Transaction-Id" },
	/* MMS 1.1 */
	{ MM_RETRIEVE_STATUS_HDR,	"X-Mms-Retrieve-Status" },
	{ MM_RETRIEVE_TEXT_HDR,		"X-Mms-Retrieve-Text" },
	{ MM_READ_STATUS_HDR,		"X-Mms-Read-Status" },
	{ MM_REPLY_CHARGING_HDR,	"X-Mms-Reply-Charging" },
	{ MM_REPLY_CHARGING_DEADLINE_HDR,
					"X-Mms-Reply-Charging-Deadline" },
	{ MM_REPLY_CHARGING_ID_HDR,	"X-Mms-Reply-Charging-ID" },
	{ MM_REPLY_CHARGING_SIZE_HDR,	"X-Mms-Reply-Charging-Size" },
	{ MM_PREV_SENT_BY_HDR,		"X-Mms-Previously-Sent-By" },
	{ MM_PREV_SENT_DATE_HDR,	"X-Mms-Previously-Sent-Date" },
	/* MMS 1.2 */
	{ MM_STORE_HDR,			"X-Mms-Store" },
	{ MM_MM_STATE_HDR,		"X-Mms-MM-State	" },
	{ MM_MM_FLAGS_HDR,		"X-Mms-MM-Flags	" },
	{ MM_STORE_STATUS_HDR,		"X-Mms-Store-Status" },
	{ MM_STORE_STATUS_TEXT_HDR,	"X-Mms-Store-Status-Text" },
	{ MM_STORED_HDR,		"X-Mms-Stored" },
	{ MM_ATTRIBUTES_HDR,		"X-Mms-Attributes" },
	{ MM_TOTALS_HDR,		"X-Mms-Totals" },
	{ MM_MBOX_TOTALS_HDR,		"X-Mms-Mbox-Totals" },
	{ MM_QUOTAS_HDR,		"X-Mms-Quotas" },
	{ MM_MBOX_QUOTAS_HDR,		"X-Mms-Mbox-Quotas" },
	{ MM_MBOX_MSG_COUNT_HDR,	"X-Mms-Message-Count" },
	{ MM_CONTENT_HDR,		"Content" },
	{ MM_START_HDR,			"X-Mms-Start" },
	{ MM_ADDITIONAL_HDR,		"Additional-headers" },
	{ MM_DISTRIBUION_IND_HDR,	"X-Mms-Distribution-Indcator" },
	{ MM_ELEMENT_DESCR_HDR,		"X-Mms-Element-Descriptor" },
	{ MM_LIMIT_HDR,			"X-Mms-Limit" },

	{ 0x00, NULL },
};
/*
 * Initialize the protocol and registered fields
 */
static int proto_mmse = -1;

static int hf_mmse_message_type		= -1;
static int hf_mmse_transaction_id	= -1;
static int hf_mmse_mms_version		= -1;
static int hf_mmse_bcc			= -1;
static int hf_mmse_cc			= -1;
static int hf_mmse_content_location	= -1;
static int hf_mmse_date			= -1;
static int hf_mmse_delivery_report	= -1;
static int hf_mmse_delivery_time_abs	= -1;
static int hf_mmse_delivery_time_rel	= -1;
static int hf_mmse_expiry_abs		= -1;
static int hf_mmse_expiry_rel		= -1;
static int hf_mmse_from			= -1;
static int hf_mmse_message_class_id	= -1;
static int hf_mmse_message_class_str	= -1;
static int hf_mmse_message_id		= -1;
static int hf_mmse_message_size		= -1;
static int hf_mmse_priority		= -1;
static int hf_mmse_read_reply		= -1;
static int hf_mmse_report_allowed	= -1;
static int hf_mmse_response_status	= -1;
static int hf_mmse_response_text	= -1;
static int hf_mmse_sender_visibility	= -1;
static int hf_mmse_status		= -1;
static int hf_mmse_subject		= -1;
static int hf_mmse_to			= -1;
static int hf_mmse_content_type		= -1;
static int hf_mmse_ffheader		= -1;
/* MMSE 1.1 */
static int hf_mmse_read_report		= -1;
static int hf_mmse_retrieve_status	= -1;
static int hf_mmse_retrieve_text	= -1;
static int hf_mmse_read_status		= -1;
static int hf_mmse_reply_charging	= -1;
static int hf_mmse_reply_charging_deadline	= -1;
static int hf_mmse_reply_charging_id	= -1;
static int hf_mmse_reply_charging_size	= -1;
static int hf_mmse_prev_sent_by	= -1;
static int hf_mmse_prev_sent_by_fwd_count	= -1;
static int hf_mmse_prev_sent_by_address	= -1;
static int hf_mmse_prev_sent_date	= -1;
static int hf_mmse_prev_sent_date_fwd_count	= -1;
static int hf_mmse_prev_sent_date_date	= -1;

/*
 * Initialize the subtree pointers
 */
static gint ett_mmse			= -1;
static gint ett_mmse_hdr_details	= -1;

/*
 * Valuestrings for PDU types
 */
/* MMS 1.0 */
#define PDU_M_SEND_REQ		0x80
#define PDU_M_SEND_CONF		0x81
#define PDU_M_NOTIFICATION_IND	0x82
#define PDU_M_NOTIFYRESP_IND	0x83
#define PDU_M_RETRIEVE_CONF	0x84
#define PDU_M_ACKNOWLEDGE_IND	0x85
#define PDU_M_DELIVERY_IND	0x86
/* MMS 1.1 */
#define PDU_M_READ_REC_IND	0x87
#define PDU_M_READ_ORIG_IND	0x88
#define PDU_M_FORWARD_REQ	0x89
#define PDU_M_FORWARD_CONF	0x8A
/* MMS 1.2 */
#define PDU_M_MBOX_STORE_REQ	0x8B
#define PDU_M_MBOX_STORE_CONF	0x8C
#define PDU_M_MBOX_VIEW_REQ	0x8D
#define PDU_M_MBOX_VIEW_CONF	0x8E
#define PDU_M_MBOX_UPLOAD_REQ	0x8F
#define PDU_M_MBOX_UPLOAD_CONF	0x90
#define PDU_M_MBOX_DELETE_REQ	0x91
#define PDU_M_MBOX_DELETE_CONF	0x92
#define PDU_M_MBOX_DESCR	0x93

#define pdu_has_content(pdut) \
	(  ((pdut) == PDU_M_SEND_REQ) \
	|| ((pdut) == PDU_M_DELIVERY_IND) \
	|| ((pdut) == PDU_M_RETRIEVE_CONF) \
	|| ((pdut) == PDU_M_MBOX_VIEW_CONF) \
	|| ((pdut) == PDU_M_MBOX_DESCR) \
	|| ((pdut) == PDU_M_MBOX_UPLOAD_REQ) \
	)

static const value_string vals_message_type[] = {
    /* MMS 1.0 */
    { PDU_M_SEND_REQ,		"m-send-req" },
    { PDU_M_SEND_CONF,		"m-send-conf" },
    { PDU_M_NOTIFICATION_IND,	"m-notification-ind" },
    { PDU_M_NOTIFYRESP_IND,	"m-notifyresp-ind" },
    { PDU_M_RETRIEVE_CONF,	"m-retrieve-conf" },
    { PDU_M_ACKNOWLEDGE_IND,	"m-acknowledge-ind" },
    { PDU_M_DELIVERY_IND,	"m-delivery-ind" },
    /* MMS 1.1 */
    { PDU_M_READ_REC_IND,	"m-read-rec-ind" },
    { PDU_M_READ_ORIG_IND,	"m-read-orig-ind" },
    { PDU_M_FORWARD_REQ,	"m-forward-req" },
    { PDU_M_FORWARD_CONF,	"m-forward-conf" },
    /* MMS 1.2 */
    { PDU_M_MBOX_STORE_REQ,	"m-mbox-store-req" },
    { PDU_M_MBOX_STORE_CONF,	"m-mbox-store-conf" },
    { PDU_M_MBOX_VIEW_REQ,	"m-mbox-view-req" },
    { PDU_M_MBOX_VIEW_CONF,	"m-mbox-view-conf" },
    { PDU_M_MBOX_UPLOAD_REQ,	"m-mbox-upload-req" },
    { PDU_M_MBOX_UPLOAD_CONF,	"m-mbox-upload-conf" },
    { PDU_M_MBOX_DELETE_REQ,	"m-mbox-delete-req" },
    { PDU_M_MBOX_DELETE_CONF,	"m-mbox-delete-conf" },
    { PDU_M_MBOX_DESCR,		"m-mbox-descr" },
    { 0x00, NULL },
};

static const value_string vals_yes_no[] = {
    { 0x80, "Yes" },
    { 0x81, "No" },
    { 0x00, NULL },
};

static const value_string vals_message_class[] = {
    { 0x80, "Personal" },
    { 0x81, "Advertisement" },
    { 0x82, "Informational" },
    { 0x83, "Auto" },
    { 0x00, NULL },
};

static const value_string vals_priority[] = {
    { 0x80, "Low" },
    { 0x81, "Normal" },
    { 0x82, "High" },
    { 0x00, NULL },
};

static const value_string vals_response_status[] = {
    /* MMS 1.0 - obsolete as from MMS 1.1 */
    { 0x80, "Ok" },
    { 0x81, "Unspecified" },
    { 0x82, "Service denied" },
    { 0x83, "Message format corrupt" },
    { 0x84, "Sending address unresolved" },
    { 0x85, "Message not found" },
    { 0x86, "Network problem" },
    { 0x87, "Content not accepted" },
    { 0x88, "Unsupported message" },

    /*
     * Transient errors
     */
    /* MMS 1.1 */
    { 0xC0, "Transient failure" },
    { 0xC1, "Transient: Sending address unresolved" },
    { 0xC2, "Transient: Message not found" },
    { 0xC3, "Transient: Network problem" },
    /* MMS 1.2 */
    { 0xC4, "Transient: Partial success" },

    /*
     * Permanent errors
     */
    /* MMS 1.1 */
    { 0xE0, "Permanent failure" },
    { 0xE1, "Permanent: Service denied" },
    { 0xE2, "Permanent: Message format corrupt" },
    { 0xE3, "Permanent: Sending address unresolved" },
    { 0xE4, "Permanent: Message not found" },
    { 0xE5, "Permanent: Content not accepted" },
    { 0xE6, "Permanent: Reply charging limitations not met" },
    { 0xE7, "Permanent: Reply charging request not accepted" },
    { 0xE8, "Permanent: Reply charging forwarding denied" },
    { 0xE9, "Permanent: Reply charging not supported" },
    /* MMS 1.2 */
    { 0xEA, "Permanent: Address hiding not supported" },
    
    { 0x00, NULL },
};

static const value_string vals_sender_visibility[] = {
    { 0x80, "Hide" },
    { 0x81, "Show" },
    { 0x00, NULL },
};

static const value_string vals_message_status[] = {
    /* MMS 1.0 */
    { 0x80, "Expired" },
    { 0x81, "Retrieved" },
    { 0x82, "Rejected" },
    { 0x83, "Deferred" },
    { 0x84, "Unrecognized" },
    /* MMS 1.1 */
    { 0x85, "Indeterminate" },
    { 0x86, "Forwarded" },
    /* MMS 1.2 */
    { 0x87, "Unreachable" },
    
    { 0x00, NULL },
};

static const value_string vals_retrieve_status[] = {
    /*
     * Transient errors
     */
    /* MMS 1.1 */
    { 0xC0, "Transient failure" },
    { 0xC1, "Transient: Message not found" },
    { 0xC2, "Transient: Network problem" },

    /*
     * Permanent errors
     */
    /* MMS 1.1 */
    { 0xE0, "Permanent failure" },
    { 0xE1, "Permanent: Service denied" },
    { 0xE2, "Permanent: Message not found" },
    { 0xE3, "Permanent: Content unsupported" },

    { 0x00, NULL },
};

static const value_string vals_read_status[] = {
    { 0x80, "Read" },
    { 0x81, "Deleted without being read" },

    { 0x00, NULL },
};

static const value_string vals_reply_charging[] = {
    { 0x80, "Requested" },
    { 0x81, "Requested text only" },
    { 0x82, "Accepted" },
    { 0x83, "Accepted text only" },

    { 0x00, NULL },
};

static const value_string vals_reply_charging_deadline[] = {
    { 0x80, "Absolute" },
    { 0x81, "Relative" },

    { 0x00, NULL },
};

/*!
 * Decodes a Text-string from the protocol data
 * 	Text-string = [Quote] *TEXT End-of-string
 * 	Quote	    = <Octet 127>
 * 	End-of-string = <Octet 0>
 *
 * \todo Shouldn't we be sharing this with WSP (packet-wap.c)?
 *
 * \param	tvb	The buffer with PDU-data
 * \param	offset	Offset within that buffer
 * \param	strval	Pointer to variable into which to put pointer to
 *			buffer allocated to hold the text; must be freed
 *			when no longer used
 *
 * \return		The length in bytes of the entire field
 */
static guint
get_text_string(tvbuff_t *tvb, guint offset, char **strval)
{
    guint	 len;

    DebugLog(("get_text_string(tvb = %p, offset = %u, **strval) - start\n", 
		tvb, offset));
    len = tvb_strsize(tvb, offset);
    DebugLog((" [1] tvb_strsize(tvb, offset) == %u\n", len));
    if (tvb_get_guint8(tvb, offset) == MM_QUOTE)
	*strval = (char *)tvb_memdup(tvb, offset + 1, len - 1);
    else
	*strval = (char *)tvb_memdup(tvb, offset, len);
    DebugLog((" [3] Return(len) == %u\n", len));
    return len;
}

/*!
 * Decodes a Value-length from the protocol data.
 * 	Value-length = Short-length | (Length-quote Length)
 * 	Short-length = <Any octet 0-30>
 * 	Length-quote = <Octet 31>
 * 	Length	     = Uintvar-integer
 *
 * \todo Shouldn't we be sharing this with WSP (packet-wap.c)?
 *
 * \param	tvb		The buffer with PDU-data
 * \param	offset		Offset within that buffer
 * \param	byte_count	Returns the length in bytes of
 *				the "Value-length" field.
 *
 * \return			The actual value of "Value-length"
 */
static guint
get_value_length(tvbuff_t *tvb, guint offset, guint *byte_count)
{
    guint	 field;

    field = tvb_get_guint8(tvb, offset++);
    if (field < 31)
	*byte_count = 1;
    else {			/* Must be 31 so, Uintvar follows	*/
	field = tvb_get_guintvar(tvb, offset, byte_count);
	(*byte_count)++;
    }
    return field;
}

/*!
 * Decodes an Encoded-string-value from the protocol data
 * 	Encoded-string-value = Text-string | Value-length Char-set Text-string
 *
 * \param	tvb	The buffer with PDU-data
 * \param	offset	Offset within that buffer
 * \param	strval	Pointer to variable into which to put pointer to
 *			buffer allocated to hold the text; must be freed
 *			when no longer used
 *
 * \return		The length in bytes of the entire field
 */
static guint
get_encoded_strval(tvbuff_t *tvb, guint offset, char **strval)
{
    guint	 field;
    guint	 length;
    guint	 count;

    field = tvb_get_guint8(tvb, offset);

    if (field < 32) {
	length = get_value_length(tvb, offset, &count);
	if (length < 2) {
	    *strval = g_strdup("");
	} else {
	    /* \todo	Something with "Char-set", skip for now	*/
	    *strval = (char *)tvb_get_string(tvb, offset + count + 1, length - 1);
	}
	return count + length;
    } else
	return get_text_string(tvb, offset, strval);
}

/*!
 * Decodes a Long-integer from the protocol data
 * 	Long-integer = Short-length Multi-octet-integer
 * 	Short-length = <Any octet 0-30>
 * 	Multi-octet-integer = 1*30OCTET
 *
 * \todo Shouldn't we be sharing this with WSP (packet-wap.c)?
 *
 * \param	tvb		The buffer with PDU-data
 * \param	offset		Offset within that buffer
 * \param	byte_count	Returns the length in bytes of the field
 *
 * \return			The value of the Long-integer
 *
 * \note	A maximum of 4-byte integers will be handled.
 */
static guint
get_long_integer(tvbuff_t *tvb, guint offset, guint *byte_count)
{
    guint	 val;

    *byte_count = tvb_get_guint8(tvb, offset++);
    switch (*byte_count) {
	case 1:
	    val = tvb_get_guint8(tvb, offset);
	    break;
	case 2:
	    val = tvb_get_ntohs(tvb, offset);
	    break;
	case 3:
	    val = tvb_get_ntoh24(tvb, offset);
	    break;
	case 4:
	    val = tvb_get_ntohl(tvb, offset);
	    break;
	default:
	    val = 0;
	    break;
    }
    (*byte_count)++;
    return val;
}

/*!
 * Decodes an Integer-value from the protocol data
 * 	Integer-value = Short-integer | Long-integer
 * 	Short-integer = OCTET
 * 	Long-integer = Short-length Multi-octet-integer
 * 	Short-length = <Any octet 0-30>
 * 	Multi-octet-integer = 1*30OCTET
 *
 * \todo Shouldn't we be sharing this with WSP (packet-wap.c)?
 *
 * \param	tvb		The buffer with PDU-data
 * \param	offset		Offset within that buffer
 * \param	byte_count	Returns the length in bytes of the field
 *
 * \return			The value of the Long-integer
 *
 * \note	A maximum of 4-byte integers will be handled.
 */
static guint
get_integer_value(tvbuff_t *tvb, guint offset, guint *byte_count)
{
    guint	 val;
    guint8 peek;

    peek = tvb_get_guint8(tvb, offset++);
    if (peek & 0x80) {
	val = peek & 0x7F;
	*byte_count = 1;
	return val;
    } else {
	*byte_count = peek;
	switch (peek) {
	case 1:
	    val = tvb_get_guint8(tvb, offset);
	    break;
	case 2:
	    val = tvb_get_ntohs(tvb, offset);
	    break;
	case 3:
	    val = tvb_get_ntoh24(tvb, offset);
	    break;
	case 4:
	    val = tvb_get_ntohl(tvb, offset);
	    break;
	default:
	    val = 0;
	    break;
	}
    }
    (*byte_count)++;
    return val;
}

/* Code to actually dissect the packets */
static gboolean
dissect_mmse_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
    guint8	 pdut;

	DebugLog(("dissect_mmse_heur()\n"));
    /*
     * Check if data makes sense for it to be dissected as MMSE:  Message-type
     * field must make sense and followed by either Transaction-Id
     * or MMS-Version header
     */
    if (tvb_get_guint8(tvb, 0) != MM_MTYPE_HDR)
	return FALSE;
    pdut = tvb_get_guint8(tvb, 1);
    if (match_strval(pdut, vals_message_type) == NULL)
	return FALSE;
    if ((tvb_get_guint8(tvb, 2) != MM_TID_HDR) &&
	(tvb_get_guint8(tvb, 2) != MM_VERSION_HDR))
	return FALSE;
    dissect_mmse_standalone(tvb, pinfo, tree);
    return TRUE;
}

static void
dissect_mmse_standalone(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
    guint8	 pdut;
    char	 *message_type;

    DebugLog(("dissect_mmse_standalone() - START (Packet %u)\n",
		pinfo->fd->num));

    pdut = tvb_get_guint8(tvb, 1);
    message_type = match_strval(pdut, vals_message_type);

    /* 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, "MMSE");

    if (check_col(pinfo->cinfo, COL_INFO)) {
	col_clear(pinfo->cinfo, COL_INFO);
	col_add_fstr(pinfo->cinfo, COL_INFO, "MMS %s", message_type);
    }

    dissect_mmse(tvb, pinfo, tree, pdut, message_type);
}

static void
dissect_mmse_encapsulated(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
    guint8	 pdut;
    char	 *message_type;

    DebugLog(("dissect_mmse_encapsulated() - START (Packet %u)\n",
		pinfo->fd->num));

    pdut = tvb_get_guint8(tvb, 1);
    message_type = match_strval(pdut, vals_message_type);

    /* Make entries in Info column on summary display */
    if (check_col(pinfo->cinfo, COL_INFO)) {
	col_append_sep_fstr(pinfo->cinfo, COL_INFO, " ", "(MMS %s)",
		message_type);
    }

    dissect_mmse(tvb, pinfo, tree, pdut, message_type);
}

static void
dissect_mmse(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint8 pdut,
	char *message_type)
{
    guint	 offset;
    guint8	 field = 0;
    char	 *strval;
    guint	 length;
    guint	 count;
    guint8	 version = 0x80; /* Default to MMSE 1.0 */

    /* Set up structures needed to add the protocol subtree and manage it */
    proto_item	*ti = NULL;
    proto_tree	*mmse_tree = NULL;

    DebugLog(("dissect_mmse() - START (Packet %u)\n", pinfo->fd->num));

    /* If tree == NULL then we are only interested in protocol dissection
     * up to reassembly and handoff to subdissectors if applicable; the
     * columns must be set appropriately too.
     * If tree != NULL then we also want to display the protocol tree
     * with its fields.
     * 
     * In the interest of speed, skip protocol tree item generation
     * if tree is NULL.
     */
    if (tree) {
	DebugLog(("tree != NULL\n"));

	ti = proto_tree_add_item(tree, proto_mmse, tvb, 0, -1, FALSE);
	proto_item_append_text(ti, ", Type: %s", message_type);
	/* create display subtree for the protocol */
	mmse_tree = proto_item_add_subtree(ti, ett_mmse);

	/* Report PDU-type	*/
	proto_tree_add_uint(mmse_tree, hf_mmse_message_type, tvb, 0, 2, pdut);
    }

    offset = 2;			/* Skip Message-Type	*/

    /*
     * Cycle through MMS-headers
     *
     * NOTE - some PDUs may convey content which can be handed off
     *        to subdissectors.
     */
    if (tree || pdu_has_content(pdut)) {
	while ((offset < tvb_reported_length(tvb)) &&
	       (field = tvb_get_guint8(tvb, offset++)) != MM_CTYPE_HDR)
	{
	    DebugLog(("\tField =  0x%02X (offset = %u): %s\n",
			field, offset,
			val_to_str(field, vals_mm_header_names,
			    "Unknown MMS header 0x%02X")));
	    switch (field)
	    {
		case MM_TID_HDR:		/* Text-string	*/
		    length = get_text_string(tvb, offset, &strval);
		    if (tree) {
			proto_tree_add_string(mmse_tree, hf_mmse_transaction_id,
				tvb, offset - 1, length + 1,strval);
		    }
		    g_free(strval);
		    offset += length;
		    break;
		case MM_VERSION_HDR:		/* nibble-Major/nibble-minor*/
		    version = tvb_get_guint8(tvb, offset++);
		    if (tree) {
			guint8	 major, minor;

			major = (version & 0x70) >> 4;
			minor = version & 0x0F;
			if (minor == 0x0F)
			    strval = g_strdup_printf("%u", major);
			else
			    strval = g_strdup_printf("%u.%u", major, minor);
			proto_tree_add_string(mmse_tree, hf_mmse_mms_version,
				tvb, offset - 2, 2, strval);
			g_free(strval);
		    }
		    break;
		case MM_BCC_HDR:		/* Encoded-string-value	*/
		    length = get_encoded_strval(tvb, offset, &strval);
		    if (tree) {
			proto_tree_add_string(mmse_tree, hf_mmse_bcc, tvb,
				offset - 1, length + 1, strval);
		    }
		    g_free(strval);
		    offset += length;
		    break;
		case MM_CC_HDR:			/* Encoded-string-value	*/
		    length = get_encoded_strval(tvb, offset, &strval);
		    if (tree) {
			proto_tree_add_string(mmse_tree, hf_mmse_cc, tvb,
				offset - 1, length + 1, strval);
		    }
		    g_free(strval);
		    offset += length;
		    break;
		case MM_CLOCATION_HDR:		/* Uri-value		*/
		    if (pdut == PDU_M_MBOX_DELETE_CONF) {
			/* General form with length */
			length = tvb_get_guint8(tvb, offset);
			if (length == 0x1F) {
			    guint length_len = 0;
			    length = tvb_get_guintvar(tvb, offset + 1,
				    &length_len);
			    length += 1 + length_len;
			} else {
			    length += 1;
			}
			if (tree) {
			    proto_tree_add_string(mmse_tree,
				    hf_mmse_content_location,
				    tvb, offset - 1, length + 1,
				    "<Undecoded value for m-mbox-delete-conf>");
			}
		    } else {
			length = get_text_string(tvb, offset, &strval);
			if (tree) {
			    proto_tree_add_string(mmse_tree,
				    hf_mmse_content_location,
				    tvb, offset - 1, length + 1, strval);
			}
			g_free(strval);
		    }
		    offset += length;
		    break;
		case MM_DATE_HDR:		/* Long-integer		*/
		    {
			guint		 tval;
			nstime_t	 tmptime;

			tval = get_long_integer(tvb, offset, &count);
			tmptime.secs = tval;
			tmptime.nsecs = 0;
			if (tree) {
			    proto_tree_add_time(mmse_tree, hf_mmse_date, tvb,
				    offset - 1, count + 1, &tmptime);
			}
		    }
		    offset += count;
		    break;
		case MM_DREPORT_HDR:		/* Yes|No		*/
		    field = tvb_get_guint8(tvb, offset++);
		    if (tree) {
			proto_tree_add_uint(mmse_tree,
				hf_mmse_delivery_report,
				tvb, offset - 2, 2, field);
		    }
		    break;
		case MM_DTIME_HDR:
		    /*
		     * Value-length(Absolute-token Date-value|
		     * 		    Relative-token Delta-seconds-value)
		     */
		    length = get_value_length(tvb, offset, &count);
		    field = tvb_get_guint8(tvb, offset + count);
		    if (tree) {
			guint		 tval;
			nstime_t	 tmptime;
			guint		 cnt;

			tval =  get_long_integer(tvb, offset + count + 1, &cnt);
			tmptime.secs = tval;
			tmptime.nsecs = 0;

			if (field == 0x80)
			    proto_tree_add_time(mmse_tree,
				    hf_mmse_delivery_time_abs,
				    tvb, offset - 1,
				    length + count + 1, &tmptime);
			else
			    proto_tree_add_time(mmse_tree,
				    hf_mmse_delivery_time_rel,
				    tvb, offset - 1,
				    length + count + 1, &tmptime);
		    }
		    offset += length + count;
		    break;
		case MM_EXPIRY_HDR:
		    /*
		     * Value-length(Absolute-token Date-value|
		     * 		    Relative-token Delta-seconds-value)
		     */
		    length = get_value_length(tvb, offset, &count);
		    field = tvb_get_guint8(tvb, offset + count);
		    if (tree) {
			guint		 tval;
			nstime_t	 tmptime;
			guint		 cnt;

			tval = get_long_integer(tvb, offset + count + 1, &cnt);
			tmptime.secs = tval;
			tmptime.nsecs = 0;

			if (field == 0x80)
			    proto_tree_add_time(mmse_tree, hf_mmse_expiry_abs,
				    tvb, offset - 1,
				    length + count + 1, &tmptime);
			else
			    proto_tree_add_time(mmse_tree, hf_mmse_expiry_rel,
				    tvb, offset - 1,
				    length + count + 1, &tmptime);
		    }
		    offset += length + count;
		    break;
		case MM_FROM_HDR:
		    /*
		     * Value-length(Address-present-token Encoded-string-value
		     * 		    |Insert-address-token)
		     */
		    length = get_value_length(tvb, offset, &count);
		    if (tree) {
			field = tvb_get_guint8(tvb, offset + count);
			if (field == 0x81) {
			    proto_tree_add_string(mmse_tree, hf_mmse_from, tvb,
				    offset-1, length + count + 1,
				    "<insert address>");
			} else {
			    (void) get_encoded_strval(tvb, offset + count + 1,
						      &strval);
			    proto_tree_add_string(mmse_tree, hf_mmse_from, tvb,
				    offset-1, length + count + 1, strval);
			    g_free(strval);
			}
		    }
		    offset += length + count;
		    break;
		case MM_MCLASS_HDR:
		    /*
		     * Class-identifier|Text-string
		     */
		    field = tvb_get_guint8(tvb, offset);
		    if (field & 0x80) {
			offset++;
			if (tree) {
			    proto_tree_add_uint(mmse_tree,
				    hf_mmse_message_class_id,
				    tvb, offset - 2, 2, field);
			}
		    } else {
			length = get_text_string(tvb, offset, &strval);
			if (tree) {
			    proto_tree_add_string(mmse_tree,
				    hf_mmse_message_class_str,
				    tvb, offset - 1, length + 1,
				    strval);
			}
			g_free(strval);
			offset += length;
		    }
		    break;
		case MM_MID_HDR:		/* Text-string		*/
		    length = get_text_string(tvb, offset, &strval);
		    if (tree) {
			proto_tree_add_string(mmse_tree, hf_mmse_message_id,
				tvb, offset - 1, length + 1, strval);
		    }
		    g_free(strval);
		    offset += length;
		    break;
		case MM_MSIZE_HDR:		/* Long-integer		*/
		    length = get_long_integer(tvb, offset, &count);
		    if (tree) {
			proto_tree_add_uint(mmse_tree, hf_mmse_message_size,
				tvb, offset - 1, count + 1, length);
		    }
		    offset += count;
		    break;
		case MM_PRIORITY_HDR:		/* Low|Normal|High	*/
		    field = tvb_get_guint8(tvb, offset++);
		    if (tree) {
			proto_tree_add_uint(mmse_tree, hf_mmse_priority, tvb,
				offset - 2, 2, field);
		    }
		    break;
		case MM_RREPLY_HDR:		/* Yes|No		*/
		    field = tvb_get_guint8(tvb, offset++);
		    if (tree) {
			if (version == 0x80) { /* MMSE 1.0 */
			    proto_tree_add_uint(mmse_tree, hf_mmse_read_reply,
				    tvb, offset - 2, 2, field);
			} else {
			    proto_tree_add_uint(mmse_tree, hf_mmse_read_report,
				    tvb, offset - 2, 2, field);
			}
		    }
		    break;
		case MM_RALLOWED_HDR:		/* Yes|No		*/
		    field = tvb_get_guint8(tvb, offset++);
		    if (tree) {
			proto_tree_add_uint(mmse_tree, hf_mmse_report_allowed,
				tvb, offset - 2, 2, field);
		    }
		    break;
		case MM_RSTATUS_HDR:
		    field = tvb_get_guint8(tvb, offset++);
		    if (tree) {
			proto_tree_add_uint(mmse_tree, hf_mmse_response_status,
				tvb, offset - 2, 2, field);
		    }
		    break;
		case MM_RTEXT_HDR:		/* Encoded-string-value	*/
		    if (pdut == PDU_M_MBOX_DELETE_CONF) {
			/* General form with length */
			length = tvb_get_guint8(tvb, offset);
			if (length == 0x1F) {
			    guint length_len = 0;
			    length = tvb_get_guintvar(tvb, offset + 1,
				    &length_len);
			    length += 1 + length_len;
			} else {
			    length += 1;
			}
			if (tree) {
			    proto_tree_add_string(mmse_tree,
				    hf_mmse_content_location,
				    tvb, offset - 1, length + 1,
				    "<Undecoded value for m-mbox-delete-conf>");
			}
		    } else {
    			length = get_encoded_strval(tvb, offset, &strval);
			if (tree) {
			    proto_tree_add_string(mmse_tree,
				    hf_mmse_response_text, tvb, offset - 1,
				    length + 1, strval);
			}
			g_free(strval);
		    }
		    offset += length;
		    break;
		case MM_SVISIBILITY_HDR:	/* Hide|Show		*/
		    field = tvb_get_guint8(tvb, offset++);
		    if (tree) {
			proto_tree_add_uint(mmse_tree,hf_mmse_sender_visibility,
				tvb, offset - 2, 2, field);
		    }
		    break;
		case MM_STATUS_HDR:
		    field = tvb_get_guint8(tvb, offset++);
		    if (tree) {
			proto_tree_add_uint(mmse_tree, hf_mmse_status, tvb,
				offset - 2, 2, field);
		    }
		    break;
		case MM_SUBJECT_HDR:		/* Encoded-string-value	*/
		    length = get_encoded_strval(tvb, offset, &strval);
		    if (tree) {
			proto_tree_add_string(mmse_tree, hf_mmse_subject, tvb,
				offset - 1, length + 1, strval);
		    }
		    g_free(strval);
		    offset += length;
		    break;
		case MM_TO_HDR:			/* Encoded-string-value	*/
		    length = get_encoded_strval(tvb, offset, &strval);
		    if (tree) {
			proto_tree_add_string(mmse_tree, hf_mmse_to, tvb,
				offset - 1, length + 1, strval);
		    }
		    g_free(strval);
		    offset += length;
		    break;

		/*
		 * MMS Encapsulation 1.1
		 */
		case MM_RETRIEVE_STATUS_HDR:	/* Well-known-value */
		    field = tvb_get_guint8(tvb, offset++);
		    if (tree) {
			proto_tree_add_uint(mmse_tree, hf_mmse_retrieve_status,
				tvb, offset - 2, 2, field);
		    }
		    break;
		case MM_RETRIEVE_TEXT_HDR:
		    if (pdut == PDU_M_MBOX_DELETE_CONF) {
			/* General form with length */
			length = tvb_get_guint8(tvb, offset);
			if (length == 0x1F) {
			    guint length_len = 0;
			    length = tvb_get_guintvar(tvb, offset + 1,
				    &length_len);
			    length += 1 + length_len;
			} else {
			    length += 1;
			}
			if (tree) {
			    proto_tree_add_string(mmse_tree,
				    hf_mmse_content_location,
				    tvb, offset - 1, length + 1,
				    "<Undecoded value for m-mbox-delete-conf>");
			}
		    } else {
			/* Encoded-string-value */
			length = get_encoded_strval(tvb, offset, &strval);
			if (tree) {
			    proto_tree_add_string(mmse_tree,
				    hf_mmse_retrieve_text, tvb, offset - 1,
				    length + 1, strval);
			}
			g_free(strval);
		    }
		    offset += length;
		    break;
		case MM_READ_STATUS_HDR:	/* Well-known-value */
		    field = tvb_get_guint8(tvb, offset++);
		    if (tree) {
			proto_tree_add_uint(mmse_tree, hf_mmse_read_status,
				tvb, offset - 2, 2, field);
		    }
		    break;
		case MM_REPLY_CHARGING_HDR:	/* Well-known-value */
		    field = tvb_get_guint8(tvb, offset++);
		    if (tree) {
			proto_tree_add_uint(mmse_tree, hf_mmse_reply_charging,
				tvb, offset - 2, 2, field);
		    }
		    break;
		case MM_REPLY_CHARGING_DEADLINE_HDR:	/* Well-known-value */
		    field = tvb_get_guint8(tvb, offset++);
		    if (tree) {
			proto_tree_add_uint(mmse_tree,
				hf_mmse_reply_charging_deadline,
				tvb, offset - 2, 2, field);
		    }
		    break;
		case MM_REPLY_CHARGING_ID_HDR:	/* Text-string */
		    length = get_text_string(tvb, offset, &strval);
		    if (tree) {
			proto_tree_add_string(mmse_tree,
				hf_mmse_reply_charging_id,
				tvb, offset - 1, length + 1, strval);
		    }
		    g_free(strval);
		    offset += length;
		    break;
		case MM_REPLY_CHARGING_SIZE_HDR:	/* Long-integer */
		    length = get_long_integer(tvb, offset, &count);
		    if (tree) {
			proto_tree_add_uint(mmse_tree,
				hf_mmse_reply_charging_size,
				tvb, offset - 1, count + 1, length);
		    }
		    offset += count;
		    break;
		case MM_PREV_SENT_BY_HDR:
		    /* Value-length Integer-value Encoded-string-value */
		    length = get_value_length(tvb, offset, &count);
		    if (tree) {
			guint32 fwd_count, count1, count2;			
			proto_tree *subtree = NULL;
			proto_item *ti = NULL;
			/* 1. Forwarded-count-value := Integer-value */
			fwd_count = get_integer_value(tvb, offset + count,
			    &count1);
			/* 2. Encoded-string-value */
			count2 = get_encoded_strval(tvb,
				offset + count + count1, &strval);
			/* Now render the fields */
			ti = proto_tree_add_string_format(tree,
				hf_mmse_prev_sent_by,
				tvb, offset - 1, 1 + count + length,
				"%s (Forwarded-count=%u)",
				strval, fwd_count);
			subtree = proto_item_add_subtree(ti,
				ett_mmse_hdr_details);
			proto_tree_add_uint(subtree,
				hf_mmse_prev_sent_by_fwd_count,
				tvb, offset + count, count1, fwd_count);
			proto_tree_add_string(subtree,
				hf_mmse_prev_sent_by_address,
				tvb, offset + count + count1, count2, strval);
			g_free(strval);
		    }
		    offset += length + count;
		    break;
		case MM_PREV_SENT_DATE_HDR:
		    /* Value-Length Forwarded-count-value Date-value */
		    length = get_value_length(tvb, offset, &count);
		    if (tree) {
			guint32 fwd_count, count1, count2;			
			guint		 tval;
			nstime_t	 tmptime;
			proto_tree *subtree = NULL;
			proto_item *ti = NULL;
			/* 1. Forwarded-count-value := Integer-value */
			fwd_count = get_integer_value(tvb, offset + count,
			    &count1);
			/* 2. Date-value := Long-integer */
			tval = get_long_integer(tvb, offset + count + count1,
				&count2);
			tmptime.secs = tval;
			tmptime.nsecs = 0;
			strval = abs_time_to_str(&tmptime);
			/* Now render the fields */
			ti = proto_tree_add_string_format(tree,
				hf_mmse_prev_sent_date,
				tvb, offset - 1, 1 + count + length,
				"%s (Forwarded-count=%u)",
				strval, fwd_count);
			subtree = proto_item_add_subtree(ti,
				ett_mmse_hdr_details);
			proto_tree_add_uint(subtree,
				hf_mmse_prev_sent_date_fwd_count,
				tvb, offset + count, count1, fwd_count);
			proto_tree_add_string(subtree,
				hf_mmse_prev_sent_date_date,
				tvb, offset + count + count1, count2, strval);
			g_free(strval);
		    }
		    offset += length + count;
		    break;

		/* MMS Encapsulation 1.2 */

		default:
		    if (field & 0x80) { /* Well-known WSP header encoding */
			guint8 peek = tvb_get_guint8(tvb, offset);
			char *hdr_name = val_to_str(field, vals_mm_header_names,
				"Unknown field (0x%02x)");
			DebugLog(("\t\tUndecoded well-known header: %s\n",
				    hdr_name));

			if (peek & 0x80) { /* Well-known value */
			    length = 1;
			    if (tree) {
				proto_tree_add_text(mmse_tree, tvb, offset - 1,
					length + 1,
					"%s: <Well-known value 0x%02x>"
					" (not decoded)",
					hdr_name, peek);
			    }
			} else if ((peek == 0) || (peek >= 0x20)) { /* Text */
			    length = get_text_string(tvb, offset, &strval);
			    if (tree) {
				proto_tree_add_text(mmse_tree, tvb, offset - 1,
					length + 1, "%s: %s (Not decoded)",
					hdr_name, strval);
				g_free(strval);
			    }
			} else { /* General form with length */
			    if (peek == 0x1F) { /* Value length in guintvar */
				guint length_len = 0;
				length = 1 + tvb_get_guintvar(tvb, offset + 1,
					&length_len);
				length += length_len;
			    } else { /* Value length in octet */
				length = 1 + tvb_get_guint8(tvb, offset);
			    }
			    if (tree) {
				proto_tree_add_text(mmse_tree, tvb, offset - 1,
					length + 1, "%s: "
					"<Value in general form> (not decoded)",
					hdr_name);
			    }
			}
			offset += length;
		    } else { /* Literal WSP header encoding */
			guint	 length2;
			char	 *strval2;

			--offset;
			length = get_text_string(tvb, offset, &strval);
			DebugLog(("\t\tUndecoded literal header: %s\n",
				    strval));
			CLEANUP_PUSH(g_free, strval);
			length2= get_text_string(tvb, offset+length, &strval2);

			if (tree) {
			    proto_tree_add_string_format(mmse_tree,
				    hf_mmse_ffheader, tvb, offset,
				    length + length2,
				    (const char *) tvb_get_ptr(
					    tvb, offset, length + length2),
				    "%s: %s", strval, strval2);
			}
			g_free(strval2);
			offset += length + length2;
			CLEANUP_CALL_AND_POP;
		    }
		    break;
	    }
	    DebugLog(("\tEnd(case)\n"));
	}
	DebugLog(("\tEnd(switch)\n"));
	if (field == MM_CTYPE_HDR) {
	    /*
	     * Eeehh, we're now actually back to good old WSP content-type
	     * encoding. Let's steal that from the WSP-dissector.
	     */
	    tvbuff_t	*tmp_tvb;
	    guint	 type;
	    const char	*type_str;

	    DebugLog(("Content-Type: [from WSP dissector]\n"));
	    DebugLog(("Calling add_content_type() in WSP dissector\n"));
	    offset = add_content_type(mmse_tree, tvb, offset, &type, &type_str);
	    DebugLog(("Generating new TVB subset (offset = %u)\n", offset));
	    tmp_tvb = tvb_new_subset(tvb, offset, -1, -1);
	    DebugLog(("Add POST data\n"));
	    add_post_data(mmse_tree, tmp_tvb, type, type_str, pinfo);
	    DebugLog(("Done!\n"));
	}
    } else {
	DebugLog(("tree == NULL and PDU has no potential content\n"));
    }

    /* If this protocol has a sub-dissector call it here, see section 1.8 */
    DebugLog(("dissect_mmse() - END\n"));
}


/* Register the protocol with Ethereal */

/* this format is required because a script is used to build the C function
 * that calls all the protocol registration.
 */
void
proto_register_mmse(void)
{
    /* Setup list of header fields  See Section 1.6.1 for details	*/
    static hf_register_info hf[] = {
	{   &hf_mmse_message_type,
	    {   "X-Mms-Message-Type", "mmse.message_type",
		FT_UINT8, BASE_HEX, VALS(vals_message_type), 0x00,
		"Specifies the transaction type. Effectively defines PDU.",
		HFILL
	    }
	},
	{   &hf_mmse_transaction_id,
	    {   "X-Mms-Transaction-ID", "mmse.transaction_id",
		FT_STRING, BASE_NONE, NULL, 0x00,
		"A unique identifier for this transaction. "
		"Identifies request and corresponding response only.",
		HFILL
	    }
	},
	{   &hf_mmse_mms_version,
	    {   "X-Mms-MMS-Version", "mmse.mms_version",
		FT_STRING, BASE_NONE, NULL, 0x00,
		"Version of the protocol used.",
		HFILL
	    }
	},
	{   &hf_mmse_bcc,
	    {   "Bcc", "mmse.bcc",
		FT_STRING, BASE_NONE, NULL, 0x00,
		"Blind carbon copy.",
		HFILL
	    }
	},
	{   &hf_mmse_cc,
	    {   "Cc", "mmse.cc",
		FT_STRING, BASE_NONE, NULL, 0x00,
		"Carbon copy.",
		HFILL
	    }
	},
	{   &hf_mmse_content_location,
	    {   "X-Mms-Content-Location", "mmse.content_location",
		FT_STRING, BASE_NONE, NULL, 0x00,
		"Defines the location of the message.",
		HFILL
	    }
	},
	{   &hf_mmse_date,
	    {   "Date", "mmse.date",
		FT_ABSOLUTE_TIME, BASE_NONE, NULL, 0x00,
		"Arrival timestamp of the message or sending timestamp.",
		HFILL
	    }
	},
	{   &hf_mmse_delivery_report,
	    {   "X-Mms-Delivery-Report", "mmse.delivery_report",
		FT_UINT8, BASE_HEX, VALS(vals_yes_no), 0x00,
		"Whether a report of message delivery is wanted or not.",
		HFILL
	    }
	},
	{   &hf_mmse_delivery_time_abs,
	    {   "X-Mms-Delivery-Time", "mmse.delivery_time.abs",
		FT_ABSOLUTE_TIME, BASE_NONE, NULL, 0x00,
		"The time at which message delivery is desired.",
		HFILL
	    }
	},
	{   &hf_mmse_delivery_time_rel,
	    {   "X-Mms-Delivery-Time", "mmse.delivery_time.rel",
		FT_RELATIVE_TIME, BASE_NONE, NULL, 0x00,
		"The desired message delivery delay.",
		HFILL
	    }
	},
	{   &hf_mmse_expiry_abs,
	    {   "X-Mms-Expiry", "mmse.expiry.abs",
		FT_ABSOLUTE_TIME, BASE_NONE, NULL, 0x00,
		"Time when message expires and need not be delivered anymore.",
		HFILL
	    }
	},
	{   &hf_mmse_expiry_rel,
	    {   "X-Mms-Expiry", "mmse.expiry.rel",
		FT_RELATIVE_TIME, BASE_NONE, NULL, 0x00,
		"Delay before message expires and need not be delivered anymore.",
		HFILL
	    }
	},
	{   &hf_mmse_from,
	    {   "From", "mmse.from",
		FT_STRING, BASE_NONE, NULL, 0x00,
		"Address of the message sender.",
		HFILL
	    }
	},
	{   &hf_mmse_message_class_id,
	    {   "X-Mms-Message-Class", "mmse.message_class.id",
		FT_UINT8, BASE_HEX, VALS(vals_message_class), 0x00,
		"Of what category is the message.",
		HFILL
	    }
	},
	{   &hf_mmse_message_class_str,
	    {   "X-Mms-Message-Class", "mmse.message_class.str",
		FT_STRING, BASE_NONE, NULL, 0x00,
		"Of what category is the message.",
		HFILL
	    }
	},
	{   &hf_mmse_message_id,
	    {   "Message-Id", "mmse.message_id",
		FT_STRING, BASE_NONE, NULL, 0x00,
		"Unique identification of the message.",
		HFILL
	    }
	},
	{   &hf_mmse_message_size,
	    {   "X-Mms-Message-Size", "mmse.message_size",
		FT_UINT32, BASE_DEC, NULL, 0x00,
		"The size of the message in octets.",
		HFILL
	    }
	},
	{   &hf_mmse_priority,
	    {   "X-Mms-Priority", "mmse.priority",
		FT_UINT8, BASE_HEX, VALS(vals_priority), 0x00,
		"Priority of the message.",
		HFILL
	    }
	},
	{   &hf_mmse_read_reply,
	    {   "X-Mms-Read-Reply", "mmse.read_reply",
		FT_UINT8, BASE_HEX, VALS(vals_yes_no), 0x00,
		"Whether a read report from every recipient is wanted.",
		HFILL
	    }
	},
	{   &hf_mmse_read_report,
	    {   "X-Mms-Read-Report", "mmse.read_report",
		FT_UINT8, BASE_HEX, VALS(vals_yes_no), 0x00,
		"Whether a read report from every recipient is wanted.",
		HFILL
	    }
	},
	{   &hf_mmse_report_allowed,
	    {   "X-Mms-Report-Allowed", "mmse.report_allowed",
		FT_UINT8, BASE_HEX, VALS(vals_yes_no), 0x00,
		"Sending of delivery report allowed or not.",
		HFILL
	    }
	},
	{   &hf_mmse_response_status,
	    {   "Response-Status", "mmse.response_status",
		FT_UINT8, BASE_HEX, VALS(vals_response_status), 0x00,
		"MMS-specific result of a message submission or retrieval.",
		HFILL
	    }
	},
	{   &hf_mmse_response_text,
	    {   "Response-Text", "mmse.response_text",
		FT_STRING, BASE_NONE, NULL, 0x00,
		"Additional information on MMS-specific result.",
		HFILL
	    }
	},
	{   &hf_mmse_sender_visibility,
	    {   "Sender-Visibility", "mmse.sender_visibility",
		FT_UINT8, BASE_HEX, VALS(vals_sender_visibility), 0x00,
		"Disclose sender identity to receiver or not.",
		HFILL
	    }
	},
	{   &hf_mmse_status,
	    {   "Status", "mmse.status",
		FT_UINT8, BASE_HEX, VALS(vals_message_status), 0x00,
		"Current status of the message.",
		HFILL
	    }
	},
	{   &hf_mmse_subject,
	    {   "Subject", "mmse.subject",
		FT_STRING, BASE_NONE, NULL, 0x00,
		"Subject of the message.",
		HFILL
	    }
	},
	{   &hf_mmse_to,
	    {   "To", "mmse.to",
		FT_STRING, BASE_NONE, NULL, 0x00,
		"Recipient(s) of the message.",
		HFILL
	    }
	},
	{   &hf_mmse_content_type,
	    {   "Data", "mmse.content_type",
		FT_NONE, BASE_NONE, NULL, 0x00,
		"Media content of the message.",
		HFILL
	    }
	},
	{   &hf_mmse_ffheader,
	    {   "Free format (not encoded) header", "mmse.ffheader",
		FT_STRING, BASE_NONE, NULL, 0x00,
		"Application header without corresponding encoding.",
		HFILL
	    }
	},
	/* MMSE 1.1 */
	{   &hf_mmse_retrieve_status,
	    {   "X-Mms-Retrieve-Status", "mmse.retrieve_status",
		FT_UINT8, BASE_HEX, VALS(vals_retrieve_status), 0x00,
		"MMS-specific result of a message retrieval.",
		HFILL
	    }
	},
	{   &hf_mmse_retrieve_text,
	    {   "X-Mms-Retrieve-Text", "mmse.retrieve_text",
		FT_STRING, BASE_NONE, NULL, 0x00,
		"Status text of a MMS message retrieval.",
		HFILL
	    }
	},
	{   &hf_mmse_read_status,
	    {   "X-Mms-Read-Status", "mmse.read_status",
		FT_UINT8, BASE_HEX, VALS(vals_read_status), 0x00,
		"MMS-specific message read status.",
		HFILL
	    }
	},
	{   &hf_mmse_reply_charging,
	    {   "X-Mms-Reply-Charging", "mmse.reply_charging",
		FT_UINT8, BASE_HEX, VALS(vals_reply_charging), 0x00,
		"MMS-specific message reply charging method.",
		HFILL
	    }
	},
	{   &hf_mmse_reply_charging_deadline,
	    {   "X-Mms-Reply-Charging-Deadline", "mmse.reply_charging_deadline",
		FT_UINT8, BASE_HEX, VALS(vals_reply_charging_deadline), 0x00,
		"MMS-specific message reply charging deadline type.",
		HFILL
	    }
	},
	{   &hf_mmse_reply_charging_id,
	    {   "X-Mms-Reply-Charging-Id", "mmse.reply_charging_id",
		FT_STRING, BASE_NONE, NULL, 0x00,
		"Unique reply charging identification of the message.",
		HFILL
	    }
	},
	{   &hf_mmse_reply_charging_size,
	    {   "X-Mms-Reply-Charging-Size", "mmse.reply_charging_size",
		FT_UINT32, BASE_DEC, NULL, 0x00,
		"The size of the reply charging in octets.",
		HFILL
	    }
	},
	{   &hf_mmse_prev_sent_by,
	    {   "X-Mms-Previously-Sent-By", "mmse.previously_sent_by",
    		FT_STRING, BASE_NONE, NULL, 0x00,
    		"Indicates that the MM has been previously sent by this user.",
    		HFILL
	    }
	},
	{   &hf_mmse_prev_sent_by_fwd_count,
	    {   "Forward Count", "mmse.previously_sent_by.forward_count",
		FT_UINT32, BASE_DEC, NULL, 0x00,
		"Forward count of the previously sent MM.",
		HFILL
	    }
	},
	{   &hf_mmse_prev_sent_by_address,
	    {   "Address", "mmse.previously_sent_by.address",
    		FT_STRING, BASE_NONE, NULL, 0x00,
    		"Indicates from whom the MM has been previously sent.",
    		HFILL
	    }
	},
	{   &hf_mmse_prev_sent_date,
	    {   "X-Mms-Previously-Sent-Date", "mmse.previously_sent_date",
    		FT_STRING, BASE_NONE, NULL, 0x00,
    		"Indicates the date that the MM has been previously sent.",
    		HFILL
	    }
	},
	{   &hf_mmse_prev_sent_date_fwd_count,
	    {   "Forward Count", "mmse.previously_sent_date.forward_count",
		FT_UINT32, BASE_DEC, NULL, 0x00,
		"Forward count of the previously sent MM.",
		HFILL
	    }
	},
	{   &hf_mmse_prev_sent_date_date,
	    {   "Date", "mmse.previously_sent_date.date",
		FT_ABSOLUTE_TIME, BASE_NONE, NULL, 0x00,
		"Time when the MM has been previously sent.",
    		HFILL
	    }
	},



    };
    /* Setup protocol subtree array */
    static gint *ett[] = {
	&ett_mmse,
	&ett_mmse_hdr_details,
    };

    /* Register the protocol name and description */
    proto_mmse = proto_register_protocol("MMS Message Encapsulation",
					 "MMSE", "mmse");

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

/* If this dissector uses sub-dissector registration add registration routine.
 * This format is required because a script is used to find these routines and
 * create the code that calls these routines.
 */
void
proto_reg_handoff_mmse(void)
{
    dissector_handle_t mmse_standalone_handle;
    dissector_handle_t mmse_encapsulated_handle;

    heur_dissector_add("wsp", dissect_mmse_heur, proto_mmse);
    mmse_standalone_handle = create_dissector_handle(
	    dissect_mmse_standalone, proto_mmse);
    mmse_encapsulated_handle = create_dissector_handle(
	    dissect_mmse_encapsulated, proto_mmse);
	/* As the media types for WSP and HTTP are the same, the WSP dissector
	 * uses the same string dissector table as the HTTP protocol. */
    dissector_add_string("media_type",
	    "application/vnd.wap.mms-message", mmse_standalone_handle);
    dissector_add_string("multipart_media_type",
	    "application/vnd.wap.mms-message", mmse_encapsulated_handle);
}