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godot/drivers/windows/stream_peer_tcp_winsock.cpp

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/*************************************************************************/
/* stream_peer_tcp_winsock.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifdef WINDOWS_ENABLED
#include "stream_peer_tcp_winsock.h"
#include <winsock2.h>
#include <ws2tcpip.h>
#include "drivers/unix/socket_helpers.h"
int winsock_refcount = 0;
StreamPeerTCP *StreamPeerTCPWinsock::_create() {
return memnew(StreamPeerTCPWinsock);
};
void StreamPeerTCPWinsock::make_default() {
StreamPeerTCP::_create = StreamPeerTCPWinsock::_create;
if (winsock_refcount == 0) {
WSADATA data;
WSAStartup(MAKEWORD(2, 2), &data);
};
++winsock_refcount;
};
void StreamPeerTCPWinsock::cleanup() {
--winsock_refcount;
if (winsock_refcount == 0) {
WSACleanup();
};
};
Error StreamPeerTCPWinsock::_block(int p_sockfd, bool p_read, bool p_write) const {
fd_set read, write;
FD_ZERO(&read);
FD_ZERO(&write);
if (p_read)
FD_SET(p_sockfd, &read);
if (p_write)
FD_SET(p_sockfd, &write);
int ret = select(p_sockfd + 1, &read, &write, NULL, NULL); // block forever
return ret < 0 ? FAILED : OK;
};
Error StreamPeerTCPWinsock::_poll_connection() const {
ERR_FAIL_COND_V(status != STATUS_CONNECTING || sockfd == INVALID_SOCKET, FAILED);
struct sockaddr_storage their_addr;
size_t addr_size = _set_sockaddr(&their_addr, peer_host, peer_port, sock_type);
if (::connect(sockfd, (struct sockaddr *)&their_addr, addr_size) == SOCKET_ERROR) {
int err = WSAGetLastError();
if (err == WSAEISCONN) {
status = STATUS_CONNECTED;
return OK;
};
if (err == WSAEINPROGRESS || err == WSAEALREADY) {
return OK;
}
status = STATUS_ERROR;
return ERR_CONNECTION_ERROR;
} else {
status = STATUS_CONNECTED;
return OK;
};
return OK;
};
Error StreamPeerTCPWinsock::write(const uint8_t *p_data, int p_bytes, int &r_sent, bool p_block) {
if (status == STATUS_NONE || status == STATUS_ERROR) {
return FAILED;
};
if (status != STATUS_CONNECTED) {
if (_poll_connection() != OK) {
return FAILED;
};
if (status != STATUS_CONNECTED) {
r_sent = 0;
return OK;
};
};
int data_to_send = p_bytes;
const uint8_t *offset = p_data;
if (sockfd == -1) return FAILED;
int total_sent = 0;
while (data_to_send) {
int sent_amount = send(sockfd, (const char *)offset, data_to_send, 0);
if (sent_amount == -1) {
if (WSAGetLastError() != WSAEWOULDBLOCK) {
perror("Nothing sent");
disconnect_from_host();
ERR_PRINT("Server disconnected!\n");
return FAILED;
};
if (!p_block) {
r_sent = total_sent;
return OK;
};
_block(sockfd, false, true);
} else {
data_to_send -= sent_amount;
offset += sent_amount;
total_sent += sent_amount;
};
}
r_sent = total_sent;
return OK;
};
Error StreamPeerTCPWinsock::read(uint8_t *p_buffer, int p_bytes, int &r_received, bool p_block) {
if (!is_connected_to_host()) {
return FAILED;
};
if (status != STATUS_CONNECTED) {
if (_poll_connection() != OK) {
return FAILED;
};
if (status != STATUS_CONNECTED) {
r_received = 0;
return OK;
};
};
int to_read = p_bytes;
int total_read = 0;
while (to_read) {
int read = recv(sockfd, (char *)p_buffer + total_read, to_read, 0);
if (read == -1) {
if (WSAGetLastError() != WSAEWOULDBLOCK) {
perror("Nothing read");
disconnect_from_host();
ERR_PRINT("Server disconnected!\n");
return FAILED;
};
if (!p_block) {
r_received = total_read;
return OK;
};
_block(sockfd, true, false);
} else if (read == 0) {
disconnect_from_host();
r_received = total_read;
return ERR_FILE_EOF;
} else {
to_read -= read;
total_read += read;
};
};
r_received = total_read;
return OK;
};
Error StreamPeerTCPWinsock::put_data(const uint8_t *p_data, int p_bytes) {
int total;
return write(p_data, p_bytes, total, true);
};
Error StreamPeerTCPWinsock::put_partial_data(const uint8_t *p_data, int p_bytes, int &r_sent) {
return write(p_data, p_bytes, r_sent, false);
};
Error StreamPeerTCPWinsock::get_data(uint8_t *p_buffer, int p_bytes) {
int total;
return read(p_buffer, p_bytes, total, true);
};
Error StreamPeerTCPWinsock::get_partial_data(uint8_t *p_buffer, int p_bytes, int &r_received) {
return read(p_buffer, p_bytes, r_received, false);
};
StreamPeerTCP::Status StreamPeerTCPWinsock::get_status() const {
if (status == STATUS_CONNECTING) {
_poll_connection();
};
return status;
};
bool StreamPeerTCPWinsock::is_connected_to_host() const {
if (status == STATUS_NONE || status == STATUS_ERROR) {
return false;
};
if (status != STATUS_CONNECTED) {
return true;
};
return (sockfd != INVALID_SOCKET);
};
void StreamPeerTCPWinsock::disconnect_from_host() {
if (sockfd != INVALID_SOCKET)
closesocket(sockfd);
sockfd = INVALID_SOCKET;
sock_type = IP::TYPE_NONE;
status = STATUS_NONE;
peer_host = IP_Address();
peer_port = 0;
};
void StreamPeerTCPWinsock::set_socket(int p_sockfd, IP_Address p_host, int p_port, IP::Type p_sock_type) {
sockfd = p_sockfd;
sock_type = p_sock_type;
status = STATUS_CONNECTING;
peer_host = p_host;
peer_port = p_port;
};
Error StreamPeerTCPWinsock::connect_to_host(const IP_Address &p_host, uint16_t p_port) {
ERR_FAIL_COND_V(!p_host.is_valid(), ERR_INVALID_PARAMETER);
sock_type = p_host.is_ipv4() ? IP::TYPE_IPV4 : IP::TYPE_IPV6;
sockfd = _socket_create(sock_type, SOCK_STREAM, IPPROTO_TCP);
if (sockfd == INVALID_SOCKET) {
ERR_PRINT("Socket creation failed!");
disconnect_from_host();
//perror("socket");
return FAILED;
};
unsigned long par = 1;
if (ioctlsocket(sockfd, FIONBIO, &par)) {
perror("setting non-block mode");
disconnect_from_host();
return FAILED;
};
struct sockaddr_storage their_addr;
size_t addr_size = _set_sockaddr(&their_addr, p_host, p_port, sock_type);
if (::connect(sockfd, (struct sockaddr *)&their_addr, addr_size) == SOCKET_ERROR) {
if (WSAGetLastError() != WSAEWOULDBLOCK) {
ERR_PRINT("Connection to remote host failed!");
disconnect_from_host();
return FAILED;
};
status = STATUS_CONNECTING;
} else {
status = STATUS_CONNECTED;
};
peer_host = p_host;
peer_port = p_port;
return OK;
};
void StreamPeerTCPWinsock::set_no_delay(bool p_enabled) {
ERR_FAIL_COND(!is_connected_to_host());
int flag = p_enabled ? 1 : 0;
if (setsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY, (char *)&flag, sizeof(int)) != 0) {
ERR_PRINT("Unable to set TCP no delay option");
}
}
int StreamPeerTCPWinsock::get_available_bytes() const {
unsigned long len;
int ret = ioctlsocket(sockfd, FIONREAD, &len);
ERR_FAIL_COND_V(ret == -1, 0)
return len;
}
IP_Address StreamPeerTCPWinsock::get_connected_host() const {
return peer_host;
};
uint16_t StreamPeerTCPWinsock::get_connected_port() const {
return peer_port;
};
StreamPeerTCPWinsock::StreamPeerTCPWinsock() {
sock_type = IP::TYPE_NONE;
sockfd = INVALID_SOCKET;
status = STATUS_NONE;
peer_port = 0;
};
StreamPeerTCPWinsock::~StreamPeerTCPWinsock() {
disconnect_from_host();
};
#endif
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