doubango/tinyNET/src/dns/tnet_dns_a.c
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 #if HAVE_CRT
 #define _CRTDBG_MAP_ALLOC 
 #include <stdlib.h> 
 #include <crtdbg.h>
 #endif //HAVE_CRT
 /*
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 * Copyright (C) 2020, University of the Basque Country (UPV/EHU)
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 * Contact for licensing options: <licensing-mcpttclient(at)mcopenplatform(dot)com>
 *
 * The original file was part of Open Source Doubango Framework
 * Copyright (C) 2010-2011 Mamadou Diop.
 * Copyright (C) 2012 Doubango Telecom <http://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 tnet_dns_a.c
  * @brief DNS Address record - RR - (RFC 1035).
  *
  * @author Mamadou Diop <diopmamadou(at)doubango[dot]org>
  *
 
  */
 #include "tnet_dns_a.h"
 
 #include "../tnet_types.h"
 #include "../tnet_endianness.h"
 
 #include "tsk_string.h"
 #include "tsk_memory.h"
 #include "tsk_debug.h"
 
 /** Creates new DNS A Resource Record.
 */
 tnet_dns_a_t* tnet_dns_a_create(const char* name, tnet_dns_qclass_t qclass, uint32_t ttl, uint16_t rdlength, const void* data, tsk_size_t offset)
 {
 	return tsk_object_new(tnet_dns_a_def_t, name, qclass, ttl, rdlength, data, offset);
 }
 
 
 //=================================================================================================
 //	[[DNS A]] object definition
 //
 static tsk_object_t* tnet_dns_a_ctor(tsk_object_t * self, va_list * app)
 {
 	tnet_dns_a_t *a = self;
 	if(a){
 		const char* name = va_arg(*app, const char*);
 		tnet_dns_qclass_t qclass = va_arg(*app, tnet_dns_qclass_t);
 		uint32_t ttl = va_arg(*app, uint32_t);
 		uint16_t rdlength = tsk_va_arg_u16(*app);
 		const void* data = va_arg(*app, const void*);
 		tsk_size_t offset = va_arg(*app, tsk_size_t);
 
 		const uint8_t* rddata = (((uint8_t*)data) + offset);
 		//const uint8_t* dataEnd = (rddata + rdlength);
 
 		/* init base */
 		tnet_dns_rr_init(TNET_DNS_RR(a), qtype_a, qclass);
 		TNET_DNS_RR(a)->name = tsk_strdup(name);
 		TNET_DNS_RR(a)->rdlength = rdlength;
 		TNET_DNS_RR(a)->ttl = ttl;
 
 		if(rddata && rdlength && (rdlength == 4/* 32bits */)){
 			// ==> DESERIALIZATION
 			/* ADDRESS */
 			uint32_t address = tnet_htonl_2(rddata);
 			tsk_sprintf(&(a->address), "%u.%u.%u.%u", (address>>24)&0xFF, (address>>16)&0xFF, (address>>8)&0xFF, (address>>0)&0xFF);
 		}
 		else{
 			TSK_DEBUG_ERROR("Invalid IPv4 address.");
 		}
 
 	}
 	return self;
 }
 
 static tsk_object_t* tnet_dns_a_dtor(tsk_object_t * self) 
 { 
 	tnet_dns_a_t *a = self;
 	if(a){
 		/* deinit base */
 		tnet_dns_rr_deinit(TNET_DNS_RR(a));
 
 		TSK_FREE(a->address);
 	}
 	return self;
 }
 
 static const tsk_object_def_t tnet_dns_a_def_s =
 {
 	sizeof(tnet_dns_a_t),
 	tnet_dns_a_ctor,
 	tnet_dns_a_dtor,
 	tsk_null,
 };
 const tsk_object_def_t *tnet_dns_a_def_t = &tnet_dns_a_def_s;