9336857132
We should probably create a specific function for setting the recv buffer anyway. UDP sockets does not need to bind (listen) to be able to call recvfrom. This is especially useful for clients who just call set_send_address and start communicating with a server.
299 lines
7.7 KiB
C++
299 lines
7.7 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) 2007-2017 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::TYPE_IPV4) {
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uint8_t ip[4];
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rb.read(ip,4,true);
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packet_ip.set_ipv4(ip);
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} else {
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uint8_t ip[16];
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rb.read(ip,16,true);
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packet_ip.set_ipv6(ip);
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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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ERR_FAIL_COND_V(!peer_addr.is_valid(), ERR_UNCONFIGURED);
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if(sock_type==IP::TYPE_NONE)
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sock_type = peer_addr.is_ipv4() ? IP::TYPE_IPV4 : IP::TYPE_IPV6;
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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, sock_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, IP_Address p_bind_address, int p_recv_buffer_size) {
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ERR_FAIL_COND_V(sockfd!=-1,ERR_ALREADY_IN_USE);
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ERR_FAIL_COND_V(!p_bind_address.is_valid() && !p_bind_address.is_wildcard(),ERR_INVALID_PARAMETER);
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sock_type = IP::TYPE_ANY;
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if(p_bind_address.is_valid())
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sock_type = p_bind_address.is_ipv4() ? IP::TYPE_IPV4 : IP::TYPE_IPV6;
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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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struct sockaddr_storage addr = {0};
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size_t addr_size = _set_listen_sockaddr(&addr, p_port, sock_type, IP_Address());
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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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sock_type = IP::TYPE_NONE;
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rb.resize(16);
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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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if (sockfd==-1) {
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return FAILED;
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}
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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::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::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::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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ERR_FAIL_COND_V(sock_type==IP::TYPE_NONE,-1);
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if (sockfd != -1)
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return sockfd;
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sockfd = _socket_create(sock_type, SOCK_DGRAM, IPPROTO_UDP);
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return sockfd;
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}
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void PacketPeerUDPWinsock::set_dest_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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sock_type = IP::TYPE_NONE;
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rb.resize(16);
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}
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PacketPeerUDPWinsock::~PacketPeerUDPWinsock() {
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close();
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}
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