276 lines
7.3 KiB
C
276 lines
7.3 KiB
C
/*
|
|
* Copyright (C) 2009 Mamadou Diop.
|
|
*
|
|
* Contact: Mamadou Diop <diopmamadou@yahoo.fr>
|
|
*
|
|
* 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)yahoo.fr>
|
|
*
|
|
* @date Created: Sat Nov 8 16:54:58 2009 mdiop
|
|
*/
|
|
#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 ...
|
|
*/
|
|
|
|
/**@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 = htonl((*((uint32_t*)&((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. */
|
|
size_t 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 */
|
|
data = tsk_calloc(len, sizeof(uint8_t));
|
|
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, len);
|
|
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 void* tnet_dhcp6_ctx_create(void * self, va_list * app)
|
|
{
|
|
tnet_dhcp6_ctx_t *ctx = self;
|
|
if(ctx)
|
|
{
|
|
ctx->enterprise_number = TNET_DHCP6_ENTERPRISE_NUM_DEFAULT;
|
|
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 void* tnet_dhcp6_ctx_destroy(void * 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_create,
|
|
tnet_dhcp6_ctx_destroy,
|
|
0,
|
|
};
|
|
const void *tnet_dhcp6_ctx_def_t = &tnet_dhcp6_ctx_def_s;
|