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godot/drivers/unix/stream_peer_tcp_posix.cpp

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/*************************************************************************/
/* stream_peer_tcp_posix.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2015 Juan Linietsky, Ariel Manzur. */
/* */
/* 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 UNIX_ENABLED
#include "stream_peer_tcp_posix.h"
#include <poll.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#ifndef NO_FCNTL
#include <sys/fcntl.h>
#else
#include <sys/ioctl.h>
#endif
#include <netinet/in.h>
#include <sys/socket.h>
#ifdef JAVASCRIPT_ENABLED
#include <arpa/inet.h>
#endif
#include <netinet/tcp.h>
#if defined(OSX_ENABLED) || defined(IPHONE_ENABLED)
#define MSG_NOSIGNAL SO_NOSIGPIPE
#endif
static void set_addr_in(struct sockaddr_in& their_addr, const IP_Address& p_host, uint16_t p_port) {
their_addr.sin_family = AF_INET; // host byte order
their_addr.sin_port = htons(p_port); // short, network byte order
their_addr.sin_addr = *((struct in_addr*)&p_host.host);
memset(&(their_addr.sin_zero), '\0', 8);
};
StreamPeerTCP* StreamPeerTCPPosix::_create() {
return memnew(StreamPeerTCPPosix);
};
void StreamPeerTCPPosix::make_default() {
StreamPeerTCP::_create = StreamPeerTCPPosix::_create;
};
Error StreamPeerTCPPosix::_block(int p_sockfd, bool p_read, bool p_write) const {
struct pollfd pfd;
pfd.fd = p_sockfd;
pfd.events = 0;
if (p_read)
pfd.events |= POLLIN;
if (p_write)
pfd.events |= POLLOUT;
pfd.revents = 0;
int ret = poll(&pfd, 1, -1);
return ret < 0 ? FAILED : OK;
};
Error StreamPeerTCPPosix::_poll_connection(bool p_block) const {
ERR_FAIL_COND_V(status != STATUS_CONNECTING || sockfd == -1, FAILED);
if (p_block) {
_block(sockfd, false, true);
};
struct sockaddr_in their_addr;
set_addr_in(their_addr, peer_host, peer_port);
if (::connect(sockfd, (struct sockaddr *)&their_addr,sizeof(struct sockaddr)) == -1) {
if (errno == EISCONN) {
status = STATUS_CONNECTED;
return OK;
};
return OK;
} else {
status = STATUS_CONNECTED;
return OK;
};
return OK;
};
void StreamPeerTCPPosix::set_socket(int p_sockfd, IP_Address p_host, int p_port) {
sockfd = p_sockfd;
#ifndef NO_FCNTL
fcntl(sockfd, F_SETFL, O_NONBLOCK);
#else
int bval = 1;
ioctl(sockfd, FIONBIO, &bval);
#endif
status = STATUS_CONNECTING;
peer_host = p_host;
peer_port = p_port;
};
Error StreamPeerTCPPosix::connect(const IP_Address& p_host, uint16_t p_port) {
ERR_FAIL_COND_V( p_host.host == 0, ERR_INVALID_PARAMETER);
if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
ERR_PRINT("Socket creation failed!");
disconnect();
//perror("socket");
return FAILED;
};
#ifndef NO_FCNTL
fcntl(sockfd, F_SETFL, O_NONBLOCK);
#else
int bval = 1;
ioctl(sockfd, FIONBIO, &bval);
#endif
struct sockaddr_in their_addr;
set_addr_in(their_addr, p_host, p_port);
errno = 0;
if (::connect(sockfd, (struct sockaddr *)&their_addr,sizeof(struct sockaddr)) == -1 && errno != EINPROGRESS) {
ERR_PRINT("Connection to remote host failed!");
disconnect();
return FAILED;
};
if (errno == EINPROGRESS) {
status = STATUS_CONNECTING;
} else {
status = STATUS_CONNECTED;
};
peer_host = p_host;
peer_port = p_port;
return OK;
};
Error StreamPeerTCPPosix::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(p_block) != 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;
errno = 0;
int total_sent = 0;
while (data_to_send) {
int sent_amount = send(sockfd, offset, data_to_send, MSG_NOSIGNAL);
//printf("Sent TCP data of %d bytes, errno %d\n", sent_amount, errno);
if (sent_amount == -1) {
if (errno != EAGAIN) {
perror("shit?");
disconnect();
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 StreamPeerTCPPosix::read(uint8_t* p_buffer, int p_bytes,int &r_received, bool p_block) {
if (!is_connected()) {
return FAILED;
};
if (status == STATUS_CONNECTING) {
if (_poll_connection(p_block) != OK) {
return FAILED;
};
if (status != STATUS_CONNECTED) {
r_received = 0;
return OK;
};
};
int to_read = p_bytes;
int total_read = 0;
errno = 0;
while (to_read) {
int read = recv(sockfd, p_buffer + total_read, to_read, 0);
if (read == -1) {
if (errno != EAGAIN) {
perror("shit?");
disconnect();
ERR_PRINT("Server disconnected!\n");
return FAILED;
};
if (!p_block) {
r_received = total_read;
return OK;
};
_block(sockfd, true, false);
} else if (read==0) {
sockfd=-1;
status = STATUS_NONE;
peer_port = 0;
peer_host = IP_Address();
return ERR_FILE_EOF;
} else {
to_read -= read;
total_read += read;
};
};
r_received = total_read;
return OK;
};
void StreamPeerTCPPosix::set_nodelay(bool p_enabled) {
ERR_FAIL_COND(!is_connected());
int flag=p_enabled?1:0;
setsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY, (char*)&flag, sizeof(int));
}
bool StreamPeerTCPPosix::is_connected() const {
if (status == STATUS_NONE || status == STATUS_ERROR) {
return false;
};
if (status != STATUS_CONNECTED) {
return true;
};
return (sockfd!=-1);
};
StreamPeerTCP::Status StreamPeerTCPPosix::get_status() const {
if (status == STATUS_CONNECTING) {
_poll_connection(false);
};
return status;
};
void StreamPeerTCPPosix::disconnect() {
if (sockfd != -1)
close(sockfd);
sockfd=-1;
status = STATUS_NONE;
peer_port = 0;
peer_host = IP_Address();
};
Error StreamPeerTCPPosix::put_data(const uint8_t* p_data,int p_bytes) {
int total;
return write(p_data, p_bytes, total, true);
};
Error StreamPeerTCPPosix::put_partial_data(const uint8_t* p_data,int p_bytes, int &r_sent) {
return write(p_data, p_bytes, r_sent, false);
};
Error StreamPeerTCPPosix::get_data(uint8_t* p_buffer, int p_bytes) {
int total;
return read(p_buffer, p_bytes, total, true);
};
Error StreamPeerTCPPosix::get_partial_data(uint8_t* p_buffer, int p_bytes,int &r_received) {
return read(p_buffer, p_bytes, r_received, false);
};
IP_Address StreamPeerTCPPosix::get_connected_host() const {
return peer_host;
};
uint16_t StreamPeerTCPPosix::get_connected_port() const {
return peer_port;
};
StreamPeerTCPPosix::StreamPeerTCPPosix() {
sockfd = -1;
status = STATUS_NONE;
peer_port = 0;
};
StreamPeerTCPPosix::~StreamPeerTCPPosix() {
disconnect();
};
#endif
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