286 lines
7.4 KiB
C++
286 lines
7.4 KiB
C++
/*************************************************************************/
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/* packet_peer_udp_winsock.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "packet_peer_udp_winsock.h"
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#include <winsock2.h>
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#include <ws2tcpip.h>
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#include "drivers/unix/socket_helpers.h"
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int PacketPeerUDPWinsock::get_available_packet_count() const {
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Error err = const_cast<PacketPeerUDPWinsock*>(this)->_poll(false);
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if (err!=OK)
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return 0;
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return queue_count;
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}
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Error PacketPeerUDPWinsock::get_packet(const uint8_t **r_buffer,int &r_buffer_size) const{
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Error err = const_cast<PacketPeerUDPWinsock*>(this)->_poll(false);
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if (err!=OK)
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return err;
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if (queue_count==0)
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return ERR_UNAVAILABLE;
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uint32_t size;
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uint8_t type;
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rb.read(&type, 1, true);
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if (type == IP_Address::TYPE_IPV4) {
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rb.read((uint8_t*)&packet_ip.field8,4,true);
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packet_ip.type = IP_Address::TYPE_IPV4;
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} else {
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rb.read((uint8_t*)&packet_ip.field8,16,true);
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packet_ip.type = IP_Address::TYPE_IPV6;
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};
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rb.read((uint8_t*)&packet_port,4,true);
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rb.read((uint8_t*)&size,4,true);
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rb.read(packet_buffer,size,true);
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--queue_count;
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*r_buffer=packet_buffer;
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r_buffer_size=size;
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return OK;
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}
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Error PacketPeerUDPWinsock::put_packet(const uint8_t *p_buffer,int p_buffer_size){
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int sock = _get_socket();
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ERR_FAIL_COND_V( sock == -1, FAILED );
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struct sockaddr_storage addr;
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size_t addr_size = _set_sockaddr(&addr, peer_addr, peer_port, ip_type);
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_set_blocking(true);
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errno = 0;
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int err;
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while ( (err = sendto(sock, (const char*)p_buffer, p_buffer_size, 0, (struct sockaddr*)&addr, addr_size)) != p_buffer_size) {
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if (WSAGetLastError() != WSAEWOULDBLOCK) {
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return FAILED;
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};
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}
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return OK;
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}
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int PacketPeerUDPWinsock::get_max_packet_size() const{
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return 512; // uhm maybe not
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}
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void PacketPeerUDPWinsock::_set_blocking(bool p_blocking) {
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//am no windows expert
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//hope this is the right thing
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if (blocking==p_blocking)
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return;
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blocking=p_blocking;
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unsigned long par = blocking?0:1;
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if (ioctlsocket(sockfd, FIONBIO, &par)) {
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perror("setting non-block mode");
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//close();
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//return -1;
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};
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}
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Error PacketPeerUDPWinsock::listen(int p_port, int p_recv_buffer_size) {
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close();
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int sock = _get_socket();
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if (sock == -1 )
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return ERR_CANT_CREATE;
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if(ip_type == IP_Address::TYPE_IPV6) {
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// Use IPv6 only socket
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int yes = 1;
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if(setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY, (const char*)&yes, sizeof(yes)) != 0) {
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WARN_PRINT("Unable to unset IPv4 address mapping over IPv6");
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}
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}
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struct sockaddr_storage addr = {0};
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size_t addr_size = _set_listen_sockaddr(&addr, p_port, ip_type, NULL);
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if (bind(sock, (struct sockaddr*)&addr, addr_size) == -1 ) {
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close();
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return ERR_UNAVAILABLE;
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}
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blocking=true;
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printf("UDP Connection listening on port %i\n", p_port);
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rb.resize(nearest_shift(p_recv_buffer_size));
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return OK;
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}
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void PacketPeerUDPWinsock::close(){
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if (sockfd != -1)
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::closesocket(sockfd);
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sockfd=-1;
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rb.resize(8);
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queue_count=0;
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}
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Error PacketPeerUDPWinsock::wait() {
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return _poll(true);
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}
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Error PacketPeerUDPWinsock::_poll(bool p_wait) {
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_set_blocking(p_wait);
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struct sockaddr_storage from = {0};
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int len = sizeof(struct sockaddr_storage);
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int ret;
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while ( (ret = recvfrom(sockfd, (char*)recv_buffer, MIN((int)sizeof(recv_buffer),MAX(rb.space_left()-12, 0)), 0, (struct sockaddr*)&from, &len)) > 0) {
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uint32_t port = 0;
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if (from.ss_family == AF_INET) {
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uint8_t type = (uint8_t)IP_Address::TYPE_IPV4;
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rb.write(&type, 1);
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struct sockaddr_in* sin_from = (struct sockaddr_in*)&from;
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rb.write((uint8_t*)&sin_from->sin_addr, 4);
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port = ntohs(sin_from->sin_port);
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} else if (from.ss_family == AF_INET6) {
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uint8_t type = (uint8_t)IP_Address::TYPE_IPV6;
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rb.write(&type, 1);
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struct sockaddr_in6* s6_from = (struct sockaddr_in6*)&from;
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rb.write((uint8_t*)&s6_from->sin6_addr, 16);
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port = ntohs(s6_from->sin6_port);
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} else {
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// WARN_PRINT("Ignoring packet with unknown address family");
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uint8_t type = (uint8_t)IP_Address::TYPE_NONE;
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rb.write(&type, 1);
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};
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rb.write((uint8_t*)&port, 4);
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rb.write((uint8_t*)&ret, 4);
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rb.write(recv_buffer, ret);
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len = sizeof(struct sockaddr_storage);
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++queue_count;
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};
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if (ret == SOCKET_ERROR){
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int error = WSAGetLastError();
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if (error == WSAEWOULDBLOCK){
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// Expected when doing non-blocking sockets, retry later.
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}
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else if (error == WSAECONNRESET){
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// If the remote target does not accept messages, this error may occur, but is harmless.
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// Once the remote target gets available, this message will disappear for new messages.
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}
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else
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{
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close();
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return FAILED;
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}
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}
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if (ret == 0) {
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close();
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return FAILED;
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};
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return OK;
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}
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bool PacketPeerUDPWinsock::is_listening() const{
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return sockfd!=-1;
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}
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IP_Address PacketPeerUDPWinsock::get_packet_address() const {
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return packet_ip;
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}
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int PacketPeerUDPWinsock::get_packet_port() const{
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return packet_port;
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}
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int PacketPeerUDPWinsock::_get_socket() {
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if (sockfd != -1)
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return sockfd;
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sockfd = _socket_create(ip_type, SOCK_DGRAM, IPPROTO_UDP);
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return sockfd;
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}
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void PacketPeerUDPWinsock::set_send_address(const IP_Address& p_address,int p_port) {
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peer_addr=p_address;
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peer_port=p_port;
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}
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void PacketPeerUDPWinsock::make_default() {
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PacketPeerUDP::_create = PacketPeerUDPWinsock::_create;
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};
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PacketPeerUDP* PacketPeerUDPWinsock::_create() {
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return memnew(PacketPeerUDPWinsock);
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};
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PacketPeerUDPWinsock::PacketPeerUDPWinsock() {
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sockfd=-1;
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packet_port=0;
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queue_count=0;
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peer_port=0;
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ip_type = IP_Address::TYPE_ANY;
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}
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PacketPeerUDPWinsock::~PacketPeerUDPWinsock() {
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close();
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}
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