ObjFW  Diff

/*
 * Copyright (c) 2008-2022 Jonathan Schleifer <js@nil.im>
 *
 * 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.
 *

#include <string.h>

#ifdef HAVE_FCNTL_H
# include <fcntl.h>
#endif

#import "OFTCPSocket.h"

#import "OFDNSResolver.h"
#import "OFData.h"
#import "OFDate.h"
#import "OFIPSocketAsyncConnector.h"
#import "OFRunLoop.h"
#import "OFRunLoop+Private.h"
#import "OFSocket.h"
#import "OFSocket+Private.h"
#import "OFString.h"
#import "OFTCPSocketSOCKS5Connector.h"
#import "OFThread.h"

#import "OFAlreadyConnectedException.h"
#import "OFBindFailedException.h"
#import "OFGetOptionFailedException.h"
#import "OFNotImplementedException.h"
#import "OFNotOpenException.h"
#import "OFSetOptionFailedException.h"

static const OFRunLoopMode connectRunLoopMode =
    @"OFTCPSocketConnectRunLoopMode";

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

@interface OFTCPSocket () <OFIPSocketAsyncConnecting>
@end

@interface OFTCPSocketConnectDelegate: OFObject <OFTCPSocketDelegate>
{
@public
	bool _done;
	id _exception;

			    errNo: (int *)errNo
{
#if SOCK_CLOEXEC == 0 && defined(HAVE_FCNTL) && defined(FD_CLOEXEC)
	int flags;
#endif

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

	if ((_socket = socket(
	    ((struct sockaddr *)&address->sockaddr)->sa_family,
	    SOCK_STREAM | SOCK_CLOEXEC, 0)) == OFInvalidSocketHandle) {
		*errNo = OFSocketErrNo();
		return false;
	}

#endif
		    ] autorelease];
		host = _SOCKS5Host;
		port = _SOCKS5Port;
	} else
		delegate = _delegate;

	[[[[OFIPSocketAsyncConnector alloc]
		  initWithSocket: self
			    host: host
			    port: port
			delegate: delegate
			   block: NULL
	    ] autorelease] startWithRunLoopMode: runLoopMode];

			      port: port
			  delegate: nil
			     block: block] autorelease];
		host = _SOCKS5Host;
		port = _SOCKS5Port;
	}

	[[[[OFIPSocketAsyncConnector alloc]
		  initWithSocket: self
			    host: host
			    port: port
			delegate: delegate
			   block: (delegate == nil ? block : NULL)] autorelease]
	    startWithRunLoopMode: runLoopMode];

	objc_autoreleasePoolPop(pool);
}
#endif

- (uint16_t)bindToHost: (OFString *)host port: (uint16_t)port
{
	const int one = 1;
	void *pool = objc_autoreleasePoolPush();
	OFData *socketAddresses;
	OFSocketAddress address;
#if SOCK_CLOEXEC == 0 && defined(HAVE_FCNTL) && defined(FD_CLOEXEC)
	int flags;
#endif

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

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

	socketAddresses = [[OFThread DNSResolver]
	    resolveAddressesForHost: host
		      addressFamily: OFSocketAddressFamilyAny];

	address = *(OFSocketAddress *)[socketAddresses itemAtIndex: 0];
	OFSocketAddressSetPort(&address, port);

	if ((_socket = socket(
	    ((struct sockaddr *)&address.sockaddr)->sa_family,
	    SOCK_STREAM | SOCK_CLOEXEC, 0)) == OFInvalidSocketHandle)
		@throw [OFBindFailedException
		    exceptionWithHost: host
				 port: port
			       socket: self
				errNo: OFSocketErrNo()];

	_canBlock = true;

		if (bind(_socket, (struct sockaddr *)&address.sockaddr,
		    address.length) != 0) {
			int errNo = OFSocketErrNo();

			closesocket(_socket);
			_socket = OFInvalidSocketHandle;


			@throw [OFBindFailedException exceptionWithHost: host
								   port: port
								 socket: self
								  errNo: errNo];
		}
#if defined(OF_HPUX) || defined(OF_WII) || defined(OF_NINTENDO_3DS)
	} else {
		for (;;) {
			uint16_t rnd = 0;
			int ret;

			while (rnd < 1024)
				rnd = (uint16_t)rand();

			OFSocketAddressSetPort(&address, rnd);

			if ((ret = bind(_socket,
			    (struct sockaddr *)&address.sockaddr,
			    address.length)) == 0) {
				port = rnd;
				break;
			}

			if (OFSocketErrNo() != EADDRINUSE) {
				int errNo = OFSocketErrNo();

				closesocket(_socket);
				_socket = OFInvalidSocketHandle;

				@throw [OFBindFailedException
				    exceptionWithHost: host
						 port: port
					       socket: self
						errNo: errNo];
			}
		}
	}
#endif

	objc_autoreleasePoolPop(pool);

	if (port > 0)
		return port;

#if !defined(OF_HPUX) && !defined(OF_WII) && !defined(OF_NINTENDO_3DS)
	memset(&address, 0, sizeof(address));

	address.length = (socklen_t)sizeof(address.sockaddr);
	if (OFGetSockName(_socket, (struct sockaddr *)&address.sockaddr,
	    &address.length) != 0) {
		int errNo = OFSocketErrNo();

		closesocket(_socket);
		_socket = OFInvalidSocketHandle;

		@throw [OFBindFailedException exceptionWithHost: host
							   port: port
							 socket: self
							  errNo: errNo];
	}

	switch (((struct sockaddr *)&address.sockaddr)->sa_family) {
	case AF_INET:
		return OFFromBigEndian16(address.sockaddr.in.sin_port);

# ifdef OF_HAVE_IPV6
	case AF_INET6:
		return OFFromBigEndian16(address.sockaddr.in6.sin6_port);

# endif
	default:
		closesocket(_socket);
		_socket = OFInvalidSocketHandle;


		@throw [OFBindFailedException exceptionWithHost: host
							   port: port
							 socket: self
							  errNo: EAFNOSUPPORT];
	}
#else
	closesocket(_socket);
	_socket = OFInvalidSocketHandle;
	@throw [OFBindFailedException exceptionWithHost: host
						   port: port
						 socket: self
						  errNo: EADDRNOTAVAIL];
#endif
}

#if !defined(OF_WII) && !defined(OF_NINTENDO_3DS)
- (void)setSendsKeepAlives: (bool)sendsKeepAlives
{
	int v = sendsKeepAlives;