/*
* Copyright (C) 2009 Mamadou Diop.
*
* Contact: Mamadou Diop <diopmamadou(at)doubango.org>
*	
* This file is part of Open Source Doubango Framework.
*
* DOUBANGO 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 3 of the License, or
* (at your option) any later version.
*	
* DOUBANGO 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 DOUBANGO.
*
*/

/**@file tsms_tpdu_deliver.c
 * @brief SMS TPDU SMS-DELIVER message as per 3GPP TS 23.040 section 9.2.2.1.
 *
 * @author Mamadou Diop <diopmamadou(at)doubango.org>
 *

 */
#include "tinysms/tpdu/tsms_tpdu_deliver.h"

#include "tsk_string.h"
#include "tsk_memory.h"
#include "tsk_debug.h"

#include <string.h> /* memcpy */

#define TSMS_ERROR_TOO_SHORT()\
	TSK_DEBUG_ERROR("SMS-DELIVER == Data too short.");\
	failed = tsk_true;\
	goto bail;

/** internal function used to deserialize a buffer containing a SMS-DELIVER message. */
tsms_tpdu_message_t* _tsms_tpdu_deliver_deserialize(const void* data, tsk_size_t size)
{
	/* You don't need to test data and test, this is an internal function called by tsms_tpdu_message_deserialize() */
	tsms_tpdu_deliver_t* self = tsms_tpdu_deliver_create(tsk_null, tsk_null);
	tsk_bool_t failed = tsk_false;
	tsk_size_t any_len;
	const uint8_t* pdata = data;
	const uint8_t* pend = pdata + size;

	/* SMSC address */
#if TSMS_TPDU_APPEND_SMSC
	if(!(self->smsc = tsms_address_deserialize(data, size, tsms_addr_smsc, &any_len)) || !any_len){
		TSK_DEBUG_ERROR("SMS-DELIVER == Failed to parse SMSC address");
		failed = tsk_true;
		goto bail;
	}
	else{
		if((pdata += any_len) >= pend){
			TSMS_ERROR_TOO_SHORT();
		}
	}
#endif

	/* SMS-DELIVER first Octect:
		- TP-Message-Type-Indicator(2b)
		- TP-More-Messages-to-Send(1b)
		- TP-Loop-Prevention(1b)
		- TP-Reply-Path(1b)
		- TP-User-Data-Header-Indicator(1b)
		- TP-Status-Report-Indication(1b)
		+----+----+----+----+----+----+----+----+
		|  RP|UDHI|SRI |	|LP	 |MMS | MTI	    |
		+----+----+----+----+----+----+----+----+
	*/
	TSMS_TPDU_MESSAGE(self)->mti = (*pdata & 0x03);
	self->mms = (*pdata & 0x04)>>2,
	self->lp = (*pdata & 0x08)>>3,
	self->sri = (*pdata & 0x20)>>5,
	self->udhi = (*pdata & 0x40)>>6,
	self->rp = (*pdata & 0x80)>>7;
	if((++pdata) >= pend){
		TSMS_ERROR_TOO_SHORT();
	}

	/* 3GPP TS 23.040 ==> TP-Originating-Address (TP-OA)*/
	if(!(self->oa = tsms_address_deserialize(pdata, (pend-pdata), tsms_addr_oa, &any_len)) || !any_len){
		TSK_DEBUG_ERROR("SMS-DELIVER == Failed to parse OA address");
		failed = tsk_true;
		goto bail;
	}
	else{
		if((pdata += any_len) >= pend){
			TSMS_ERROR_TOO_SHORT();
		}
	}

	/* 3GPP TS 23.040 ==> 9.2.3.9 TP-Protocol-Identifier (TP-PID)
	* 1o */
	TSMS_TPDU_MESSAGE(self)->pid = *pdata;
	if((++pdata) >= pend){
		TSMS_ERROR_TOO_SHORT();
	}
	
	/* 3GPP TS 23.040 ==> 9.2.3.10 TP-Data-Coding-Scheme (TP-DCS)
	* 1o */
	TSMS_TPDU_MESSAGE(self)->dcs = *pdata;
	if((++pdata) >= pend){
		TSMS_ERROR_TOO_SHORT();
	}
	
	/* 3GPP TS 23.040 ==> TP-Service-Centre-Time-Stamp  (TP-SCTS)
	* 7o */
	if((pend - pdata)<=7){
		TSMS_ERROR_TOO_SHORT();
	}
	memcpy(self->scts, pdata, 7);
	pdata += 7;
	

	/* 3GPP TS 23.040 ==> 9.2.3.16 TP-User-Data-Length (TP-UDL) 
	* 1o */
	TSMS_TPDU_MESSAGE(self)->udl = *pdata;
	pdata++;
	
	/* 3GPP TS 23.040 ==> 9.2.3.24 TP-User Data (TP-UD) */
	if((pend-pdata) > 0){
		TSMS_TPDU_MESSAGE(self)->ud = tsk_buffer_create(pdata, (pend-pdata));
	}

	bail:
	if(failed){
		TSK_OBJECT_SAFE_FREE(self);
	}
	return TSMS_TPDU_MESSAGE(self);
}

/** internal function used to serialize a SMS-DELIVER message. */
int _tsms_tpdu_deliver_serialize(const tsms_tpdu_deliver_t* self, tsk_buffer_t* output)
{
	uint8_t _1byte;

	if(!self){
		return -1;
	}

/* SMSC address */
#if TSMS_TPDU_APPEND_SMSC
	tsms_address_serialize(self->smsc, output);
#endif

	/* SMS-DELIVER first Octect:
		- TP-Message-Type-Indicator(2b)
		- TP-More-Messages-to-Send(1b)
		- TP-Loop-Prevention(1b)
		- TP-Reply-Path(1b)
		- TP-User-Data-Header-Indicator(1b)
		- TP-Status-Report-Indication(1b)
		+----+----+----+----+----+----+----+----+
		|  RP|UDHI|SRI |	|LP	 |MMS | MTI	    |
		+----+----+----+----+----+----+----+----+
	*/
	_1byte = (TSMS_TPDU_MESSAGE(self)->mti & 0xF3); /*2b*/
	_1byte |= ((uint8_t)self->mms) << 2 /*1b*/
	 | ((uint8_t)self->lp) << 3 /*1b*/
	/*1b (unused)*/
	 | ((uint8_t)self->sri) << 5 /*1b*/
	 | ((uint8_t)self->udhi) << 6 /*1b*/
	 | ((uint8_t)self->rp) << 7; /*1b*/
	tsk_buffer_append(output, &_1byte, 1);

	/* 3GPP TS 23.040 ==> TP-Originating-Address (TP-OA)*/
	tsms_address_serialize(self->oa, output);

	/* 3GPP TS 23.040 ==> 9.2.3.9 TP-Protocol-Identifier (TP-PID)*/
	tsk_buffer_append(output, &TSMS_TPDU_MESSAGE(self)->pid, 1); /*1o*/
	
	/* 3GPP TS 23.040 ==> 9.2.3.10 TP-Data-Coding-Scheme (TP-DCS)*/
	tsk_buffer_append(output, &TSMS_TPDU_MESSAGE(self)->dcs, 1); /*1o*/

	/* 3GPP TS 23.040 ==> TP-Service-Centre-Time-Stamp  (TP-SCTS)*/
	tsk_buffer_append(output, self->scts, sizeof(self->scts)); /*7o*/

	/* 3GPP TS 23.040 ==> 9.2.3.16 TP-User-Data-Length (TP-UDL) */
	tsk_buffer_append(output, &TSMS_TPDU_MESSAGE(self)->udl, 1); /*1o*/

	/* 3GPP TS 23.040 ==> 9.2.3.24 TP-User Data (TP-UD) */
	tsk_buffer_append(output, TSK_BUFFER_DATA(TSMS_TPDU_MESSAGE(self)->ud), TSK_BUFFER_SIZE(TSMS_TPDU_MESSAGE(self)->ud));

	return 0;
}

/**@ingroup tsms_tpdu_group
* Creates new @a SMS-DELIVER message.
* @a SMS-DELIVER messages are used to convey short messages from the SC (Service Center) to the MS (Mobile Station).<br>
* For more information, please refer to 3GPP TS 23.040 section 9.2.2.1.
* @param smsc SMSC address. e.g. "+331253688".
* @param orig The Originator address. e.g. "+331253688".
* @retval SMS-DELIVER message.
*
* See For more information, see @ref tsms_tpdu_group_DELIVER "SMS-DELIVER".
*/
tsms_tpdu_deliver_t* tsms_tpdu_deliver_create(const tsms_address_string_t smsc, const tsms_address_string_t orig)
{
	tsms_tpdu_deliver_t* ret = tsk_null;
	
	if(!(ret = tsk_object_new(tsms_tpdu_deliver_def_t, smsc, orig))){
		goto bail;
	}
	
bail:
	return ret;
}

//=================================================================================================
//	SMS TPDU SMS-DELIVER object definition
//
static tsk_object_t* tsms_tpdu_deliver_ctor(tsk_object_t * self, va_list * app)
{
	tsms_tpdu_deliver_t *deliver = self;
	if(deliver){
		const char* smsc, *orig;

		smsc = va_arg(*app, const char*);
		orig = va_arg(*app, const char*);
		
		/* init base*/
		tsms_tpdu_message_init(TSMS_TPDU_MESSAGE(deliver), tsms_tpdu_mti_deliver_mt);
		/* init self */
		deliver->mms = TSMS_TPDU_DEFAULT_MMS;
		if(smsc){
			deliver->smsc = tsms_address_smsc_create((const uint8_t*)smsc);
		}
		if(orig){
			deliver->oa = tsms_address_oa_create((const uint8_t*)orig);
		}
	}
	return self;
}

static tsk_object_t* tsms_tpdu_deliver_dtor(tsk_object_t * self)
{ 
	tsms_tpdu_deliver_t *deliver = self;
	if(deliver){
		/*deinit base*/
		tsms_tpdu_message_deinit(TSMS_TPDU_MESSAGE(deliver));
		/*deinit self*/
		TSK_OBJECT_SAFE_FREE(deliver->oa);
		TSK_OBJECT_SAFE_FREE(deliver->smsc);
	}
	return self;
}

static const tsk_object_def_t tsms_tpdu_deliver_def_s = 
{
	sizeof(tsms_tpdu_deliver_t),
	tsms_tpdu_deliver_ctor, 
	tsms_tpdu_deliver_dtor,
	tsk_null, 
};
const tsk_object_def_t *tsms_tpdu_deliver_def_t = &tsms_tpdu_deliver_def_s;
