ObjFW  Artifact [dc50295dfd]

Artifact dc50295dfd5becd72a268206370bedbb1ea9b06a2ff66c4870aa6adcc78e6c34:

• File src/OFTCPSocket.m — part of check-in [13ee56edf3] at 2014-06-21 21:43:43 on branch trunk — Move all macros from OFObject.h to macros.h

  This means that OFObject.h imports macros.h now, making it unnecessary
  to manually import macros.h in almost every file. And while at it, also
  import autorelease.h in OFObject.h, so that this doesn't need to be
  manually imported in almost every file as well. (user: js, size: 11063) [annotate] [blame] [check-ins using]

/*
 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014
 *   Jonathan Schleifer <js@webkeks.org>
 *
 * All rights reserved.
 *
 * This file is part of ObjFW. It may be distributed under the terms of the
 * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
 * the packaging of this file.
 *
 * Alternatively, it may be distributed under the terms of the GNU General
 * Public License, either version 2 or 3, which can be found in the file
 * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
 * file.
 */

#define __NO_EXT_QNX

#include "config.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <assert.h>

#import "OFTCPSocket.h"
#import "OFTCPSocket+SOCKS5.h"
#import "OFString.h"
#import "OFThread.h"
#import "OFTimer.h"
#import "OFRunLoop.h"
#import "OFRunLoop+Private.h"

#import "OFAcceptFailedException.h"
#import "OFAlreadyConnectedException.h"
#import "OFBindFailedException.h"
#import "OFConnectionFailedException.h"
#import "OFInvalidArgumentException.h"
#import "OFListenFailedException.h"
#import "OFNotConnectedException.h"
#import "OFNotImplementedException.h"
#import "OFOutOfMemoryException.h"
#import "OFSetOptionFailedException.h"

#import "resolver.h"
#import "socket_helpers.h"

/* References for static linking */
void _references_to_categories_of_OFTCPSocket(void)
{
	_OFTCPSocket_SOCKS5_reference = 1;
}

Class of_tls_socket_class = Nil;

static OFString *defaultSOCKS5Host = nil;
static uint16_t defaultSOCKS5Port = 1080;

#ifdef __wii__
static uint16_t freePort = 65532;
#endif

#ifdef OF_HAVE_THREADS
@interface OFTCPSocket_ConnectThread: OFThread
{
	OFThread *_sourceThread;
	OFTCPSocket *_socket;
	OFString *_host;
	uint16_t _port;
	id _target;
	SEL _selector;
# ifdef OF_HAVE_BLOCKS
	of_tcp_socket_async_connect_block_t _block;
# endif
	OFException *_exception;
}

- initWithSourceThread: (OFThread*)sourceThread
		socket: (OFTCPSocket*)socket
		  host: (OFString*)host
		  port: (uint16_t)port
		target: (id)target
	      selector: (SEL)selector;
# ifdef OF_HAVE_BLOCKS
- initWithSourceThread: (OFThread*)sourceThread
		socket: (OFTCPSocket*)socket
		  host: (OFString*)host
		  port: (uint16_t)port
		 block: (of_tcp_socket_async_connect_block_t)block;
# endif
@end

@implementation OFTCPSocket_ConnectThread
- initWithSourceThread: (OFThread*)sourceThread
		socket: (OFTCPSocket*)socket
		  host: (OFString*)host
		  port: (uint16_t)port
		target: (id)target
	      selector: (SEL)selector
{
	self = [super init];

	@try {
		_sourceThread = [sourceThread retain];
		_socket = [socket retain];
		_host = [host copy];
		_port = port;
		_target = [target retain];
		_selector = selector;
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

# ifdef OF_HAVE_BLOCKS
- initWithSourceThread: (OFThread*)sourceThread
		socket: (OFTCPSocket*)socket
		  host: (OFString*)host
		  port: (uint16_t)port
		 block: (of_tcp_socket_async_connect_block_t)block
{
	self = [super init];

	@try {
		_sourceThread = [sourceThread retain];
		_socket = [socket retain];
		_host = [host copy];
		_port = port;
		_block = [block copy];
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}
# endif

- (void)dealloc
{
	[_sourceThread release];
	[_socket release];
	[_host release];
	[_target release];
# ifdef OF_HAVE_BLOCKS
	[_block release];
# endif
	[_exception release];

	[super dealloc];
}

- (void)didConnect
{
	[self join];

# ifdef OF_HAVE_BLOCKS
	if (_block != NULL)
		_block(_socket, _exception);
	else {
# endif
		void (*func)(id, SEL, OFTCPSocket*, OFException*) =
		    (void(*)(id, SEL, OFTCPSocket*, OFException*))[_target
		    methodForSelector: _selector];

		func(_target, _selector, _socket, _exception);
# ifdef OF_HAVE_BLOCKS
	}
# endif
}

- (id)main
{
	void *pool = objc_autoreleasePoolPush();

	@try {
		[_socket connectToHost: _host
				  port: _port];
	} @catch (OFException *e) {
		_exception = e;
	}

	[self performSelector: @selector(didConnect)
		     onThread: _sourceThread
		waitUntilDone: false];

	objc_autoreleasePoolPop(pool);

	return nil;
}
@end
#endif

@implementation OFTCPSocket
+ (void)setSOCKS5Host: (OFString*)host
{
	id old = defaultSOCKS5Host;
	defaultSOCKS5Host = [host copy];
	[old release];
}

+ (OFString*)SOCKS5Host
{
	return [[defaultSOCKS5Host copy] autorelease];
}

+ (void)setSOCKS5Port: (uint16_t)port
{
	defaultSOCKS5Port = port;
}

+ (uint16_t)SOCKS5Port
{
	return defaultSOCKS5Port;
}

- init
{
	self = [super init];

	@try {
		_socket = INVALID_SOCKET;
		_SOCKS5Host = [defaultSOCKS5Host copy];
		_SOCKS5Port = defaultSOCKS5Port;
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- (void)dealloc
{
	[_SOCKS5Host release];

	[super dealloc];
}

- (void)setSOCKS5Host: (OFString*)SOCKS5Host
{
	OF_SETTER(_SOCKS5Host, SOCKS5Host, true, 1)
}

- (OFString*)SOCKS5Host
{
	OF_GETTER(_SOCKS5Host, true)
}

- (void)setSOCKS5Port: (uint16_t)SOCKS5Port
{
	_SOCKS5Port = SOCKS5Port;
}

- (uint16_t)SOCKS5Port
{
	return _SOCKS5Port;
}

- (void)connectToHost: (OFString*)host
		 port: (uint16_t)port
{
	OFString *destinationHost = host;
	uint16_t destinationPort = port;
	of_resolver_result_t **results, **iter;

	if (_socket != INVALID_SOCKET)
		@throw [OFAlreadyConnectedException exceptionWithSocket: self];

	if (_SOCKS5Host != nil) {
		/* Connect to the SOCKS5 proxy instead */
		host = _SOCKS5Host;
		port = _SOCKS5Port;
	}

	results = of_resolve_host(host, port, SOCK_STREAM);

	for (iter = results; *iter != NULL; iter++) {
		of_resolver_result_t *result = *iter;

		if ((_socket = socket(result->family, result->type,
		    result->protocol)) == INVALID_SOCKET)
			continue;

		if (connect(_socket, result->address,
		    result->addressLength) == -1) {
			close(_socket);
			_socket = INVALID_SOCKET;
			continue;
		}

		break;
	}

	of_resolver_free(results);

	if (_socket == INVALID_SOCKET)
		@throw [OFConnectionFailedException exceptionWithHost: host
								 port: port
							       socket: self];

	if (_SOCKS5Host != nil)
		[self OF_SOCKS5ConnectToHost: destinationHost
					port: destinationPort];
}

#ifdef OF_HAVE_THREADS
- (void)asyncConnectToHost: (OFString*)host
		      port: (uint16_t)port
		    target: (id)target
		  selector: (SEL)selector
{
	void *pool = objc_autoreleasePoolPush();

	[[[[OFTCPSocket_ConnectThread alloc]
	    initWithSourceThread: [OFThread currentThread]
			  socket: self
			    host: host
			    port: port
			  target: target
			selector: selector] autorelease] start];

	objc_autoreleasePoolPop(pool);
}

# ifdef OF_HAVE_BLOCKS
- (void)asyncConnectToHost: (OFString*)host
		      port: (uint16_t)port
		     block: (of_tcp_socket_async_connect_block_t)block
{
	void *pool = objc_autoreleasePoolPush();

	[[[[OFTCPSocket_ConnectThread alloc]
	    initWithSourceThread: [OFThread currentThread]
			  socket: self
			    host: host
			    port: port
			   block: block] autorelease] start];

	objc_autoreleasePoolPop(pool);
}
# endif
#endif

- (uint16_t)bindToHost: (OFString*)host
		  port: (uint16_t)port
{
	of_resolver_result_t **results;
	const int one = 1;
#ifndef __wii__
	union {
		struct sockaddr_storage storage;
		struct sockaddr_in in;
# ifdef AF_INET6
		struct sockaddr_in6 in6;
# endif
	} addr;
	socklen_t addrLen;
#endif

	if (_socket != INVALID_SOCKET)
		@throw [OFAlreadyConnectedException exceptionWithSocket: self];

	if (_SOCKS5Host != nil)
		@throw [OFNotImplementedException exceptionWithSelector: _cmd
								 object: self];

#ifdef __wii__
	if (port == 0)
		port = freePort--;
#endif

	results = of_resolve_host(host, port, SOCK_STREAM);
	@try {
		if ((_socket = socket(results[0]->family, results[0]->type,
		    results[0]->protocol)) == INVALID_SOCKET)
			@throw [OFBindFailedException exceptionWithHost: host
								   port: port
								 socket: self];

		if (setsockopt(_socket, SOL_SOCKET, SO_REUSEADDR,
		    (const char*)&one, (socklen_t)sizeof(one)))
			@throw [OFSetOptionFailedException
			    exceptionWithStream: self];

		if (bind(_socket, results[0]->address,
		    results[0]->addressLength) == -1) {
			close(_socket);
			_socket = INVALID_SOCKET;
			@throw [OFBindFailedException exceptionWithHost: host
								   port: port
								 socket: self];
		}
	} @finally {
		of_resolver_free(results);
	}

	if (port > 0)
		return port;

#ifndef __wii__
	addrLen = (socklen_t)sizeof(addr.storage);
	if (getsockname(_socket, (struct sockaddr*)&addr.storage, &addrLen)) {
		close(_socket);
		_socket = INVALID_SOCKET;
		@throw [OFBindFailedException exceptionWithHost: host
							   port: port
							 socket: self];
	}

	if (addr.storage.ss_family == AF_INET)
		return OF_BSWAP16_IF_LE(addr.in.sin_port);
# ifdef AF_INET6
	if (addr.storage.ss_family == AF_INET6)
		return OF_BSWAP16_IF_LE(addr.in6.sin6_port);
# endif
#endif

	close(_socket);
	_socket = INVALID_SOCKET;
	@throw [OFBindFailedException exceptionWithHost: host
						   port: port
						 socket: self];
}

- (void)listen
{
	[self listenWithBackLog: SOMAXCONN];
}

- (void)listenWithBackLog: (int)backLog
{
	if (_socket == INVALID_SOCKET)
		@throw [OFNotConnectedException exceptionWithSocket: self];

	if (listen(_socket, backLog) == -1)
		@throw [OFListenFailedException exceptionWithSocket: self
							    backLog: backLog];

	_listening = true;
}

- (instancetype)accept
{
	OFTCPSocket *client = [[[[self class] alloc] init] autorelease];

	client->_address = [client
	    allocMemoryWithSize: sizeof(struct sockaddr_storage)];
	client->_addressLength = (socklen_t)sizeof(struct sockaddr_storage);

	if ((client->_socket = accept(_socket, client->_address,
	   &client->_addressLength)) == INVALID_SOCKET)
		@throw [OFAcceptFailedException exceptionWithSocket: self];

	assert(client->_addressLength <= sizeof(struct sockaddr_storage));

	if (client->_addressLength != sizeof(struct sockaddr_storage)) {
		@try {
			client->_address = [client
			    resizeMemory: client->_address
				    size: client->_addressLength];
		} @catch (OFOutOfMemoryException *e) {
			/* We don't care, as we only made it smaller */
		}
	}

	return client;
}

- (void)asyncAcceptWithTarget: (id)target
		     selector: (SEL)selector
{
	[OFRunLoop OF_addAsyncAcceptForTCPSocket: self
					  target: target
					selector: selector];
}

#ifdef OF_HAVE_BLOCKS
- (void)asyncAcceptWithBlock: (of_tcp_socket_async_accept_block_t)block
{
	[OFRunLoop OF_addAsyncAcceptForTCPSocket: self
					   block: block];
}
#endif

- (void)setKeepAlivesEnabled: (bool)enable
{
	int v = enable;

	if (setsockopt(_socket, SOL_SOCKET, SO_KEEPALIVE,
	    (char*)&v, (socklen_t)sizeof(v)))
		@throw [OFSetOptionFailedException exceptionWithStream: self];
}

- (OFString*)remoteAddress
{
	OFString *ret;

	if (_socket == INVALID_SOCKET)
		@throw [OFNotConnectedException exceptionWithSocket: self];

	if (_address == NULL)
		@throw [OFInvalidArgumentException exception];

	of_address_to_string_and_port(_address, _addressLength, &ret, NULL);

	return ret;
}

- (bool)isListening
{
	return _listening;
}

- (void)close
{
	[super close];

	_listening = false;
}
@end