#if HAVE_CRT
#define _CRTDBG_MAP_ALLOC
#include <stdlib.h>
#include <crtdbg.h>
#endif //HAVE_CRT
/*
* Copyright (C) 2020, University of the Basque Country (UPV/EHU)
* 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_dhcp6.c
* @brief Dynamic Host Configuration Protocol for IPv6 (DHCPv6) as per RFC 3315.
* Also implement: RFC 3319, 3633, 3646, 3736, 4242, 5007 ...
*
* @author Mamadou Diop <diopmamadou(at)doubango[dot]org>
*
*/
#include "tnet_dhcp6.h"
#include "tsk_string.h"
#include "tsk_debug.h"
#include "tsk_memory.h"
#include "tsk_time.h"
#include "tsk_thread.h"
/**@defgroup tnet_dhcp6_group DHCPv6 (RFC 3315) implementation.
* Dynamic Host Configuration Protocol for IPv6 (DHCPv6) as per RFC 3315.
* Also implement: RFC 3319, 3633, 3646, 3736, 4242, 5007 ...
*/
tnet_dhcp6_ctx_t* tnet_dhcp6_ctx_create()
{
return tsk_object_new(tnet_dhcp6_ctx_def_t);
}
/**@ingroup tnet_dhcp6_group
*/
tnet_dhcp6_reply_t* tnet_dhcp6_send_request(const tnet_dhcp6_ctx_t* ctx, tnet_dhcp6_request_t* request)
{
tsk_buffer_t *output;
tnet_dhcp6_reply_t* reply = 0;
int ret;
struct timeval tv;
fd_set set;
uint64_t timeout = 0;
tsk_list_item_t *item;
const tnet_interface_t *iface;
tnet_ip_t bestsource;
tnet_socket_t *localsocket6 = 0;
struct sockaddr_storage server;
if(!ctx || !request){
goto bail;
}
if((ret = tnet_getbestsource(TNET_DHCP6_All_DHCP_Relay_Agents_and_Servers, ctx->server_port, tnet_socket_type_udp_ipv6, &bestsource))){
TSK_DEBUG_WARN("Failed to get best source for [%s]:%u.", TNET_DHCP6_All_DHCP_Relay_Agents_and_Servers, ctx->server_port);
//fe80::21b:63ff:fea9:c14e%4
localsocket6 = tnet_socket_create(TNET_SOCKET_HOST_ANY, ctx->port_client, tnet_socket_type_udp_ipv6);
}
else{
localsocket6 = tnet_socket_create(bestsource, ctx->port_client, tnet_socket_type_udp_ipv6);
}
/* Check local socket. */
if(!TNET_SOCKET_IS_VALID(localsocket6)){
TSK_DEBUG_ERROR("Failed to create/bind DHCPv6 client socket.");
goto bail;
}
/* Always wait for 200ms before retransmission */
tv.tv_sec = 0;
tv.tv_usec = (200 * 1000);
if(tnet_sockaddr_init(TNET_DHCP6_All_DHCP_Relay_Agents_and_Servers, ctx->server_port, tnet_socket_type_udp_ipv6, &server)){
TNET_PRINT_LAST_ERROR("Failed to initialize the DHCPv6 server address.");
goto bail;
}
/* Set timeout */
timeout = tsk_time_epoch() + ctx->timeout;
do
{
tsk_list_foreach(item, ctx->interfaces){
iface = item->data;
/* Set FD */
FD_ZERO(&set);
FD_SET(localsocket6->fd, &set);
///* ciaddr */
//if(request->type == dhcp_type_inform){
// struct sockaddr_storage ss;
// if(!tnet_get_sockaddr(localsocket4->fd, &ss)){
// uint32_t addr = tnet_htonl_2(&((struct sockaddr_in*)&ss)->sin_addr);
// memcpy(&request->ciaddr, &addr, 4);
// }
//}
///* chaddr */
//memset(request->chaddr, 0, sizeof(request->chaddr));
//request->hlen = iface->mac_address_length > sizeof(request->chaddr) ? sizeof(request->chaddr) : iface->mac_address_length;
//memcpy(request->chaddr, iface->mac_address, request->hlen);
/* Serialize and send to the server. */
if(!(output = tnet_dhcp6_message_serialize(ctx, request))){
TSK_DEBUG_ERROR("Failed to serialize the DHCPv6 message.");
goto next_iface;
}
/* Send the request to the DHCP server */
if((ret =tnet_sockfd_sendto(localsocket6->fd, (const struct sockaddr*)&server, output->data, output->size))<0){
TNET_PRINT_LAST_ERROR("Failed to send DHCPv6 request.");
tsk_thread_sleep(150); // wait 150ms before trying the next iface.
goto next_iface;
}
/* wait for response */
if((ret = select(localsocket6->fd+1, &set, NULL, NULL, &tv))<0){ /* Error */
TNET_PRINT_LAST_ERROR("select have failed.");
tsk_thread_sleep(150); // wait 150ms before trying the next iface.
goto next_iface;
}
else if(ret == 0){ /* timeout ==> do nothing */
}
else{ /* there is data to read. */
unsigned int len = 0;
void* data = 0;
/* Check how how many bytes are pending */
if((ret = tnet_ioctlt(localsocket6->fd, FIONREAD, &len))<0){
goto next_iface;
}
/* Receive pending data */
#if HAVE_CRT //Debug memory
data = calloc(len, sizeof(uint8_t));
#else
data = tsk_calloc(len, sizeof(uint8_t));
#endif //HAVE_CRT
if((ret = tnet_sockfd_recv(localsocket6->fd, data, len, 0))<0){
TSK_FREE(data);
TNET_PRINT_LAST_ERROR("Failed to receive DHCP dgrams.");
goto next_iface;
}
/* Parse the incoming response. */
reply = tnet_dhcp6_message_deserialize(ctx, data, (tsk_size_t)ret);
TSK_FREE(data);
if(reply)
{ /* response successfuly parsed */
if(request->transaction_id != reply->transaction_id)
{ /* Not same transaction id ==> continue*/
TSK_OBJECT_SAFE_FREE(reply);
}
}
}
next_iface:
TSK_OBJECT_SAFE_FREE(output);
if(reply){
goto bail;
}
}
break;//FIXME
}
while(timeout > tsk_time_epoch());
bail:
TSK_OBJECT_SAFE_FREE(localsocket6);
return reply;
}
/**@ingroup tnet_dhcp6_group
*/
tnet_dhcp6_reply_t* tnet_dhcp6_requestinfo(const tnet_dhcp6_ctx_t* ctx, const tnet_dhcp6_option_orequest_t *orequest)
{
tnet_dhcp6_reply_t* reply = 0;
tnet_dhcp6_request_t* request = tnet_dhcp6_request_create(dhcp6_type_information_request);
tnet_dhcp6_option_t* option = 0;
if(!ctx || !orequest || !request){
goto bail;
}
if((option = tnet_dhcp6_option_create(dhcp6_code_oro, orequest, sizeof(*orequest)))){
tsk_list_push_back_data(request->options, (void**)&option);
}
/* Vendor class */
{
}
reply = tnet_dhcp6_send_request(ctx, request);
bail:
return reply;
}
//=================================================================================================
// [[DHCPv6 CONTEXT]] object definition
//
static tsk_object_t* tnet_dhcp6_ctx_ctor(tsk_object_t * self, va_list * app)
{
tnet_dhcp6_ctx_t *ctx = self;
if(ctx){
ctx->pen = TNET_IANA_PEN;
ctx->vendor_class_data = tsk_strdup(TNET_DHCP6_VENDOR_CLASS_DATA_DEFAULT);
ctx->port_client = TNET_DHCP6_CLIENT_PORT;
ctx->server_port = TNET_DHCP6_SERVER_PORT;
ctx->interfaces = tnet_get_interfaces();
ctx->timeout = 0xffff; /* FIXME */
if(!ctx->interfaces || TSK_LIST_IS_EMPTY(ctx->interfaces)){
TSK_DEBUG_ERROR("Failed to retrieve network interfaces.");
}
tsk_safeobj_init(ctx);
}
return self;
}
static tsk_object_t* tnet_dhcp6_ctx_dtor(tsk_object_t * self)
{
tnet_dhcp6_ctx_t *ctx = self;
if(ctx){
tsk_safeobj_deinit(ctx);
TSK_FREE(ctx->vendor_class_data);
TSK_OBJECT_SAFE_FREE(ctx->interfaces);
}
return self;
}
static const tsk_object_def_t tnet_dhcp6_ctx_def_s =
{
sizeof(tnet_dhcp6_ctx_t),
tnet_dhcp6_ctx_ctor,
tnet_dhcp6_ctx_dtor,
tsk_null,
};
const tsk_object_def_t *tnet_dhcp6_ctx_def_t = &tnet_dhcp6_ctx_def_s;