| c732d49e |
* 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_dhcp_option.c
* @brief DHCP Options and BOOTP Vendor Extensions as per RFC 2132.
*
* @author Mamadou Diop <diopmamadou(at)doubango[dot]org>
*
*/
#include "tnet_dhcp_option.h"
#include "tnet_dhcp_option_sip.h"
#include "../tnet_types.h"
#include "../tnet_endianness.h"
#include "tsk_memory.h"
#include "tsk_debug.h"
tnet_dhcp_option_t* tnet_dhcp_option_create(tnet_dhcp_option_code_t code)
{
return tsk_object_new(tnet_dhcp_option_def_t, code);
}
tnet_dhcp_option_paramslist_t* tnet_dhcp_option_paramslist_create()
{
return tsk_object_new(tnet_dhcp_option_paramslist_def_t);
}
tnet_dhcp_option_dns_t* tnet_dhcp_option_dns_create(const void* payload, tsk_size_t payload_size)
{
return tsk_object_new(tnet_dhcp_option_dns_def_t, payload, payload_size);
}
/** Initializes DHCPv4 option.
*
* @param [in,out] self The option to initialize.
* @param code The code of the option to initialize.
*
* @return Zero if succeed and non-zero error code otherwise.
**/
int tnet_dhcp_option_init(tnet_dhcp_option_t *self, tnet_dhcp_option_code_t code)
{
if(self)
{
if(!self->initialized)
{
self->code = code;
//option->value = tsk_buffer_create_null();
self->initialized = tsk_true;
return 0;
}
return -2;
}
return -1;
}
int tnet_dhcp_option_deinit(tnet_dhcp_option_t *self)
{
if(self)
{
if(self->initialized)
{
TSK_OBJECT_SAFE_FREE(self->value);
self->initialized = tsk_false;
return 0;
}
return -2;
}
return -1;
}
tnet_dhcp_option_t* tnet_dhcp_option_deserialize(const void* data, tsk_size_t size)
{
tnet_dhcp_option_t *option = 0;
uint8_t* dataPtr = ((uint8_t*)data);
//uint8_t* dataEnd = (dataPtr+size);
tnet_dhcp_option_code_t code;
uint8_t len;
/* Check validity */
if(!dataPtr || size<2/*Code Len*/){
goto bail;
}
code = (tnet_dhcp_option_code_t)*dataPtr++;
len = *dataPtr++;
switch(code)
{
case dhcp_code_SIP_Servers_DHCP_Option:
{
option = (tnet_dhcp_option_t *)tnet_dhcp_option_sip_create(dataPtr, len);
break;
}
case dhcp_code_Domain_Server:
{
option = (tnet_dhcp_option_t *)tnet_dhcp_option_dns_create(dataPtr, len);
break;
}
default:
{
option = tnet_dhcp_option_create(code);
}
}
/* In all case */
if(option && !option->value && len){
option->value = tsk_buffer_create((((uint8_t*)data) + 2/*Code Len*/), len);
}
bail:
return option;
}
int tnet_dhcp_option_serialize(const tnet_dhcp_option_t* self, tsk_buffer_t *output)
{
if(!self || !output){
return -1;
}
/* Code */
tsk_buffer_append(output, &(self->code), 1);
if(self->value){
/* Length */
tsk_buffer_append(output, &(self->value->size), 1);
/* Value */
tsk_buffer_append(output, self->value->data, self->value->size);
}
else{
/* Length */
static uint8_t zero = 0x00;
tsk_buffer_append(output, &zero, 1);
}
return 0;
}
int tnet_dhcp_option_serializeex(tnet_dhcp_option_code_t code, uint8_t length, const void* value, tsk_buffer_t *output)
{
if(value && length && output){
tsk_buffer_append(output, &(code), 1);
tsk_buffer_append(output, &(length), 1);
tsk_buffer_append(output, value, length);
return 0;
}
return -1;
}
//
// [[DHCP OPTION]] object definition
//
static tsk_object_t* tnet_dhcp_option_ctor(tsk_object_t * self, va_list * app)
{
tnet_dhcp_option_t *option = self;
if(option){
tnet_dhcp_option_init(option, va_arg(*app, tnet_dhcp_option_code_t));
}
return self;
}
static tsk_object_t* tnet_dhcp_option_dtor(tsk_object_t * self)
{
tnet_dhcp_option_t *option = self;
if(option){
tnet_dhcp_option_deinit(option);
}
return self;
}
static const tsk_object_def_t tnet_dhcp_option_def_s =
{
sizeof(tnet_dhcp_option_t),
tnet_dhcp_option_ctor,
tnet_dhcp_option_dtor,
tsk_null,
};
const tsk_object_def_t *tnet_dhcp_option_def_t = &tnet_dhcp_option_def_s;
/*=======================================================================================
* RFC 2132 - 9.8. Parameter Request List
*=======================================================================================*/
int tnet_dhcp_option_paramslist_add_code(tnet_dhcp_option_paramslist_t* self, tnet_dhcp_option_code_t code)
{
if(self){
if(!TNET_DHCP_OPTION(self)->value){
TNET_DHCP_OPTION(self)->value = tsk_buffer_create_null();
}
return tsk_buffer_append(TNET_DHCP_OPTION(self)->value, &code, 1);
}
return -1;
}
//
// [[DHCP OPTION - RFC 2132 9.8. Parameter Request List]] object definition
//
static tsk_object_t* tnet_dhcp_option_paramslist_ctor(tsk_object_t * self, va_list * app)
{
tnet_dhcp_option_paramslist_t *option = self;
if(option){
/* init base */
tnet_dhcp_option_init(TNET_DHCP_OPTION(option), dhcp_code_Parameter_List);
}
return self;
}
static tsk_object_t* tnet_dhcp_option_paramslist_dtor(tsk_object_t * self)
{
tnet_dhcp_option_paramslist_t *option = self;
if(option){
/* deinit base */
tnet_dhcp_option_deinit(TNET_DHCP_OPTION(option));
}
return self;
}
static const tsk_object_def_t tnet_dhcp_option_paramslist_def_s =
{
sizeof(tnet_dhcp_option_paramslist_t),
tnet_dhcp_option_paramslist_ctor,
tnet_dhcp_option_paramslist_dtor,
tsk_null,
};
const tsk_object_def_t *tnet_dhcp_option_paramslist_def_t = &tnet_dhcp_option_paramslist_def_s;
/*=======================================================================================
* RFC 2132 - 3.8. Domain Name Server Option
*=======================================================================================*/
//
// [[DHCP OPTION - RFC 2132 3.8. Domain Name Server Option]] object definition
//
static tsk_object_t* tnet_dhcp_option_dns_ctor(tsk_object_t * self, va_list * app)
{
tnet_dhcp_option_dns_t *option = self;
if(option){
const void* payload = va_arg(*app, const void*);
tsk_size_t payload_size = va_arg(*app, tsk_size_t);
const uint8_t* payloadPtr = (const uint8_t*)payload;
const uint8_t* payloadEnd = (payloadPtr + payload_size);
/* init base */
tnet_dhcp_option_init(TNET_DHCP_OPTION(option), dhcp_code_Domain_Server);
option->servers = tsk_list_create();
if(payload_size<4 || payload_size%4){
TSK_DEBUG_ERROR("DHCP - The minimum length for this option is 4 octets, and the length MUST always be a multiple of 4.");
}
else{
tsk_size_t i;
char* ip4 = 0;
uint32_t address;
tsk_string_t* addrstring;
for(i=0; i<payload_size && (payloadPtr< payloadEnd); i+=4){
/*
Code Len Address 1 Address 2
+-----+-----+-----+-----+-----+-----+-----+-----+--
| 6 | n | a1 | a2 | a3 | a4 | a1 | a2 | ...
+-----+-----+-----+-----+-----+-----+-----+-----+--
*/
address = tnet_htonl_2(payloadPtr);
tsk_sprintf(&ip4, "%u.%u.%u.%u", (address>>24)&0xFF, (address>>16)&0xFF, (address>>8)&0xFF, (address>>0)&0xFF);
addrstring = tsk_string_create(ip4);
tsk_list_push_back_data(option->servers, (void*)&addrstring);
TSK_FREE(ip4);
payloadPtr+= 4;
}
}
}
return self;
}
static tsk_object_t* tnet_dhcp_option_dns_dtor(tsk_object_t * self)
{
tnet_dhcp_option_dns_t *option = self;
if(option){
/* deinit base */
tnet_dhcp_option_deinit(TNET_DHCP_OPTION(option));
TSK_OBJECT_SAFE_FREE(option->servers);
}
return self;
}
static const tsk_object_def_t tnet_dhcp_option_dns_def_s =
{
sizeof(tnet_dhcp_option_dns_t),
tnet_dhcp_option_dns_ctor,
tnet_dhcp_option_dns_dtor,
tsk_null,
};
const tsk_object_def_t *tnet_dhcp_option_dns_def_t = &tnet_dhcp_option_dns_def_s; |