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/*
* Copyright (C) 2010-2011 Mamadou Diop.
*
* Contact: Mamadou Diop <diopmamadou(at)doubango[dot]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_srv.c
* @brief DNS SeRVice locator record - RR - (RFC 2782).
*
* @author Mamadou Diop <diopmamadou(at)doubango[dot]org>
*
*/
#include "tnet_dns_srv.h"
#include "../tnet_types.h"
#include "../tnet_endianness.h"
#include "tsk_string.h"
#include "tsk_memory.h"
/** Creates new DNS SRV Resource Record.
*/
tnet_dns_srv_t* tnet_dns_srv_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_srv_def_t, name, qclass, ttl, rdlength, data, offset);
}
//=================================================================================================
// [[DNS SRV]] object definition
//
static tsk_object_t* tnet_dns_srv_ctor(tsk_object_t * self, va_list * app)
{
tnet_dns_srv_t *srv = self;
if(srv) {
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);
/* init base */
tnet_dns_rr_init(TNET_DNS_RR(srv), qtype_srv, qclass);
TNET_DNS_RR(srv)->name = tsk_strdup(name);
TNET_DNS_RR(srv)->rdlength = rdlength;
TNET_DNS_RR(srv)->ttl = ttl;
if(rdlength) {
// ==> DESERIALIZATION
/* Priority */
srv->priority = tnet_ntohs_2(((uint8_t*)data) + offset),
offset += 2;
/* Weight */
srv->weight = tnet_ntohs_2(((uint8_t*)data) + offset),
offset += 2;
/* Port */
srv->port = tnet_ntohs_2(((uint8_t*)data) + offset),
offset += 2;
/* Target */
tnet_dns_rr_qname_deserialize(data, &(srv->target), &offset);
}
}
return self;
}
static tsk_object_t* tnet_dns_srv_dtor(tsk_object_t * self)
{
tnet_dns_srv_t *srv = self;
if(srv) {
/* deinit base */
tnet_dns_rr_deinit(TNET_DNS_RR(srv));
TSK_FREE(srv->target);
}
return self;
}
static int tnet_dns_srv_cmp(const tsk_object_t *obj1, const tsk_object_t *obj2)
{
const tnet_dns_rr_t* rr1 = obj1;
const tnet_dns_rr_t* rr2 = obj2;
if(rr1 && rr2 && (rr1->qtype==qtype_srv) && (rr2->qtype==qtype_srv)) {
const tnet_dns_srv_t* srv1 = (tnet_dns_srv_t*)rr1;
const tnet_dns_srv_t* srv2 = (tnet_dns_srv_t*)rr2;
/* Compare priorities. */
if(srv1->priority < srv2->priority) { /* Lowest priority is tried first. */
return 1;
}
else if(srv1->priority > srv2->priority) {
return -1;
}
/* Compare weight */
if(srv1->weight > srv2->weight) {
return 1;
}
else if(srv1->weight < srv2->weight) {
return -1;
}
return 0;
}
else {
return -1;
}
}
static const tsk_object_def_t tnet_dns_srv_def_s = {
sizeof(tnet_dns_srv_t),
tnet_dns_srv_ctor,
tnet_dns_srv_dtor,
tnet_dns_srv_cmp,
};
const tsk_object_def_t *tnet_dns_srv_def_t = &tnet_dns_srv_def_s;
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