#if HAVE_CRT
#define _CRTDBG_MAP_ALLOC
#include <stdlib.h>
#include <crtdbg.h>
#endif //HAVE_CRT
///*
//* 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_stun.c
// * @brief Session Traversal Utilities for NAT (STUN) implementation as per RFC 5389 and RFC 3489(Obsolete).
// *
// * @author Mamadou Diop <diopmamadou(at)doubango[dot]org>
// *
//
// */
//#include "tnet_stun.h"
//
//#include "../tnet_nat.h"
//#include "../tnet_utils.h"
//
//#include "tsk_md5.h"
//#include "tsk_string.h"
//#include "tsk_memory.h"
//#include "tsk_buffer.h"
//#include "tsk_debug.h"
//
//#include <string.h>
//
///**@defgroup tnet_stun_group STUN2 (RFC 5389) implementation.
//*/
//
//
///**@ingroup tnet_stun_group
//* Creates new @ref tnet_stun_binding_t object.
//*/
//tnet_stun_binding_t* tnet_stun_binding_create(tnet_fd_t fd, tnet_socket_type_t socket_type, const char* server_address, tnet_port_t server_port, const char* username, const char* password)
//{
// return tsk_object_new(tnet_stun_binding_def_t, fd, socket_type, server_address, server_port, username, password);
//}
//
///**@ingroup tnet_stun_group
// *
// * Create generic STUN2 request with all mandatory headers and attributes.
// *
// * @param [in,out] binding The binding object from which to create the request.
// *
// * @retval STUN2 request if succeed and NULL otherwise.
//**/
//tnet_stun_pkt_t *tnet_stun_create_request(const tnet_stun_binding_t* binding)
//{
// tnet_stun_pkt_t *message = tnet_stun_message_create(binding->username, binding->password);
//
// if(message) {
// message->realm = tsk_strdup(binding->realm);
// message->nonce = tsk_strdup(binding->nonce);
//
// /* Set the request type (RFC 5389 defines only one type) */
// message->type = stun_binding_request;
//
// { /* Create random transaction id */
// tsk_istr_t random;
// tsk_md5digest_t digest;
//
// tsk_strrandom(&random);
// TSK_MD5_DIGEST_CALC(random, sizeof(random), digest);
//
// memcpy(message->transac_id, digest, TNET_STUN_TRANSACID_SIZE);
// }
//
// /* Add software attribute */
// if(binding->software) {
// tnet_stun_attr_t* attribute = (tnet_stun_attr_t*)tnet_stun_attribute_software_create(binding->software, tsk_strlen(binding->software));
// tnet_stun_message_add_attribute(message, &attribute);
// }
// }
//
// return message;
//}
//
//int tnet_stun_send_reliably(const tnet_stun_pkt_t* message)
//{
// return -1;
//}
//
//
///**@ingroup tnet_stun_group
// *
// * Internal function to send a STUN message using unrealiable protocol such as UDP.
// *
// *
// * @param localFD The local file descriptor.
// * @param RTO The Retransmission TimeOut.
// * @param Rc The Number of retransmissions.
// * @param [in,out] message The message to send.
// * @param [in,out] server The destination STUN server.
// *
// * @return The response from the server or NULL if transport error.
//**/
//tnet_stun_pkt_resp_t* tnet_stun_send_unreliably(tnet_fd_t localFD, uint16_t RTO, uint16_t Rc, const tnet_stun_pkt_t* message, struct sockaddr* server)
//{
// /* RFC 5389 - 7.2.1. Sending over UDP
// STUN indications are not retransmitted; thus, indication transactions over UDP
// are not reliable.
// */
// //int retransmit = (message->type == stun_binding_request);
//
// int ret = -1;
// uint16_t i, rto = RTO;
// struct timeval tv;
// fd_set set;
//
// tsk_buffer_t *buffer = tnet_stun_pkt_serialize(message);
// tnet_stun_pkt_resp_t *response = tsk_null;
//
// if(!buffer) {
// goto bail;
// }
//
// {
////# ifndef IOC_VENDOR
////# define IOC_VENDOR 0x18000000
////# endif
////# ifndef _WSAIOW
////# define _WSAIOW(x,y) (IOC_IN|(x)|(y))
////# endif
////# define SIO_UDP_CONNRESET _WSAIOW(IOC_VENDOR,12)
//// DWORD dwBytesReturned = 0;
//// BOOL bNewBehavior = TRUE;
//// DWORD status;
////
//// // disable new behavior using
//// // IOCTL: SIO_UDP_CONNRESET
//// status = WSAIoctl(localFD, SIO_UDP_CONNRESET, &bNewBehavior, sizeof(bNewBehavior),
//// NULL, 0, &dwBytesReturned, NULL, NULL);
// }
//
// tv.tv_sec = 0;
// tv.tv_usec = 0;
//
// /* RFC 5389 - 7.2.1. Sending over UDP
// A client SHOULD retransmit a STUN request message starting with an
// interval of RTO ("Retransmission TimeOut"), doubling after each
// retransmission.
//
// e.g. 0 ms, 500 ms, 1500 ms, 3500 ms, 7500ms, 15500 ms, and 31500 ms
// */
// for(i=0; i<Rc; i++) {
// tv.tv_sec += rto/1000;
// tv.tv_usec += (rto% 1000) * 1000;
//
// FD_ZERO(&set);
// FD_SET(localFD, &set);
//
// ret = tnet_sockfd_sendto(localFD, server, buffer->data, buffer->size);
//
// if((ret = select(localFD+1, &set, NULL, NULL, &tv))<0) {
// goto bail;
// }
// else if(ret == 0) {
// /* timeout */
// TSK_DEBUG_INFO("STUN request timedout at %d", i);
// rto *= 2;
// continue;
// }
// else if(FD_ISSET(localFD, &set)) {
// /* there is data to read */
//
// tsk_size_t len = 0;
// void* data = 0;
//
// TSK_DEBUG_INFO("STUN request got response");
//
// /* Check how how many bytes are pending */
// if((ret = tnet_ioctlt(localFD, FIONREAD, &len))<0) {
// goto bail;
// }
//
// if(len==0) {
// TSK_DEBUG_INFO("tnet_ioctlt() returent zero bytes");
// continue;
// }
//
// /* 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_recvfrom(localFD, data, len, 0, server))<0) {
// TSK_FREE(data);
//
// TSK_DEBUG_ERROR("Recving STUN dgrams failed with error code:%d", tnet_geterrno());
// goto bail;
// }
//
// /* Parse the incoming response. */
// response = tnet_stun_message_deserialize(data, (tsk_size_t)ret);
// TSK_FREE(data);
//
// if(response) {
// if(tnet_stun_transacid_cmp(message->transac_id, response->transac_id)) {
// /* Not same transaction id */
// TSK_OBJECT_SAFE_FREE(response);
// continue;
// }
// }
//
// goto bail;
// }
// else {
// continue;
// }
// }
//
//bail:
// TSK_OBJECT_SAFE_FREE(buffer);
//
// return response;
//}
//
///**@ingroup tnet_stun_group
// * Internal function to send a STUN2 binding request over the network.
// *
// * @param [in,out] context The NAT context holding the user preferences.
// * @param [in,out] binding The STUN binding object used to create the message to send.
// *
// * @return Zero if succeed and non-zero error code otherwise.
//**/
//int tnet_stun_send_bind(const tnet_nat_context_t* context, tnet_stun_binding_t *binding)
//{
// int ret = -1;
// tnet_stun_pkt_resp_t *response = 0;
// tnet_stun_pkt_req_t *request = 0;
//
//
// goto stun_phase0;
//
// /* RFC 5389 - 10.2.1.1. First Request
// If the client has not completed a successful request/response
// transaction with the server (as identified by hostname, if the DNS
// procedures of Section 9 are used, else IP address if not), it SHOULD
// omit the USERNAME, MESSAGE-INTEGRITY, REALM, and NONCE attributes.
// In other words, the very first request is sent as if there were no
// authentication or message integrity applied.
// */
//stun_phase0: {
// if(!(request = tnet_stun_create_request(binding))) {
// goto bail;
// }
//
// if(TNET_SOCKET_TYPE_IS_DGRAM(context->socket_type)) {
// response = tnet_stun_send_unreliably(binding->localFD, context->RTO, context->Rc, request, (struct sockaddr*)&binding->server);
// }
//
// if(response) {
// if(TNET_STUN_PKT_RESP_IS_ERROR(response)) {
// short code = tnet_stun_message_get_errorcode(response);
// const char* realm = tnet_stun_message_get_realm(response);
// const char* nonce = tnet_stun_message_get_nonce(response);
//
// if(code == 401 && realm && nonce) {
// if(!binding->nonce) {
// /* First time we get a nonce */
// tsk_strupdate(&binding->nonce, nonce);
// tsk_strupdate(&binding->realm, realm);
//
// /* Delete the message and response before retrying*/
// TSK_OBJECT_SAFE_FREE(response);
// TSK_OBJECT_SAFE_FREE(request);
//
// // Send again using new transaction identifier
// return tnet_stun_send_bind(context, binding);
// }
// else {
// ret = -3;
// }
// }
// else {
// ret = -2;
// }
// }
// else {
// const tnet_stun_attr_t *attribute;
// if((attribute= tnet_stun_message_get_attribute(response, stun_xor_mapped_address))) {
// ret = 0;
// binding->xmaddr = tsk_object_ref((void*)attribute);
// }
// else if((attribute= tnet_stun_message_get_attribute(response, stun_mapped_address))) {
// ret = 0;
// binding->maddr = tsk_object_ref((void*)attribute);
// }
// }
// }
// }
// /* END OF stun_phase0 */
//
//bail:
// TSK_OBJECT_SAFE_FREE(response);
// TSK_OBJECT_SAFE_FREE(request);
//
// return ret;
//}
//
///**@ingroup tnet_stun_group
// *
// * Public function to create a binding context.
// *
// * @param [in,out] nat_context The NAT context.
// * @param localFD The local file descriptor for which to create the binding context.
// *
// * @return A valid binding id if succeed and @ref kStunBindingInvalidId otherwise. If the returned id is valid then
// * the newly created binding will contain the server reflexive address associated to the local file descriptor.
//**/
//tnet_stun_binding_id_t tnet_stun_bind(const tnet_nat_context_t* nat_context, tnet_fd_t localFD)
//{
// tnet_stun_binding_id_t id = kStunBindingInvalidId;
//
// tnet_stun_binding_t *binding = 0;
//
// if(nat_context && localFD != TNET_INVALID_FD) {
// if(!(binding = tnet_stun_binding_create(localFD, nat_context->socket_type, nat_context->server_address, nat_context->server_port, nat_context->username, nat_context->password))) {
// goto bail;
// }
//
// if(tnet_stun_send_bind(nat_context, binding)) {
// TSK_OBJECT_SAFE_FREE(binding);
// goto bail;
// }
//
// id = binding->id;
// tsk_list_push_back_data(nat_context->stun_bindings, (void**)&binding);
// }
//
//bail:
// return id;
//}
//
///**@ingroup tnet_stun_group
// * Compares two transaction ids.
// *
// * @param id1 The first transaction identifier.
// * @param id2 The second transaction identifier.
// *
// * @return Zero if the two identifiers are equal and non-zero value otherwise.
//**/
//int tnet_stun_transacid_cmp(const tnet_stun_transac_id_t id1, const tnet_stun_transac_id_t id2)
//{
// tsk_size_t i;
// for(i=0; i<sizeof(tnet_stun_transac_id_t); i++) {
// if(id1[i] != id2[i]) {
// return (id1[i] - id2[i]);
// }
// }
// return 0;
//}
//
//
//
//
//
//
//
//
//
//
////=================================================================================================
//// STUN2 BINDING object definition
////
//static tsk_object_t* tnet_stun_binding_ctor(tsk_object_t * self, va_list * app)
//{
// tnet_stun_binding_t *binding = self;
// if(binding) {
// static tnet_stun_binding_id_t __binding_unique_id = 0;
//
// const char* server_address;
// tnet_port_t server_port;
//
// binding->id = ++__binding_unique_id;
//
// binding->localFD = va_arg(*app, tnet_fd_t);
// binding->socket_type = va_arg(*app, tnet_socket_type_t);
//
// server_address = tsk_strdup(va_arg(*app, const char*));
// server_port = (tnet_port_t)va_arg(*app, unsigned);
//#else
// server_port = va_arg(*app, tnet_port_t);
//
// binding->username = tsk_strdup(va_arg(*app, const char*));
// binding->password = tsk_strdup(va_arg(*app, const char*));
//
// if(server_address) {
// tnet_sockaddr_init(server_address, server_port, binding->socket_type, &binding->server);
// }
//
// binding->software = tsk_strdup(TNET_SOFTWARE);
// }
// return self;
//}
//
//static tsk_object_t* tnet_stun_binding_dtor(tsk_object_t * self)
//{
// tnet_stun_binding_t *binding = self;
// if(binding) {
// TSK_FREE(binding->username);
// TSK_FREE(binding->password);
// TSK_FREE(binding->realm);
// TSK_FREE(binding->nonce);
//
// TSK_FREE(binding->software);
//
// TSK_OBJECT_SAFE_FREE(binding->maddr);
// TSK_OBJECT_SAFE_FREE(binding->xmaddr);
// }
//
// return self;
//}
//
//static const tsk_object_def_t tnet_stun_binding_def_s = {
// sizeof(tnet_stun_binding_t),
// tnet_stun_binding_ctor,
// tnet_stun_binding_dtor,
// tsk_null,
//};
//const tsk_object_def_t *tnet_stun_binding_def_t = &tnet_stun_binding_def_s;
//
//