/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
* 2018
* Jonathan Schleifer <js@heap.zone>
*
* 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 OF_TCP_SOCKET_M
#define __NO_EXT_QNX
#include "config.h"
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_FCNTL_H
# include <fcntl.h>
#endif
#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 "OFGetOptionFailedException.h"
#import "OFInvalidArgumentException.h"
#import "OFListenFailedException.h"
#import "OFNotImplementedException.h"
#import "OFNotOpenException.h"
#import "OFOutOfMemoryException.h"
#import "OFSetOptionFailedException.h"
#import "socket.h"
#import "socket_helpers.h"
#import "resolver.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 OF_HAVE_THREADS
@interface OFTCPSocket_ConnectThread: OFThread
{
OFThread *_sourceThread;
OFTCPSocket *_socket;
OFString *_host;
uint16_t _port;
id _target;
SEL _selector;
id _context;
# ifdef OF_HAVE_BLOCKS
of_tcp_socket_async_connect_block_t _block;
# endif
id _exception;
}
- (instancetype)initWithSourceThread: (OFThread *)sourceThread
socket: (OFTCPSocket *)sock
host: (OFString *)host
port: (uint16_t)port
target: (id)target
selector: (SEL)selector
context: (id)context;
# ifdef OF_HAVE_BLOCKS
- (instancetype)initWithSourceThread: (OFThread *)sourceThread
socket: (OFTCPSocket *)sock
host: (OFString *)host
port: (uint16_t)port
block: (of_tcp_socket_async_connect_block_t)
block;
# endif
@end
@implementation OFTCPSocket_ConnectThread
- (instancetype)initWithSourceThread: (OFThread *)sourceThread
socket: (OFTCPSocket *)sock
host: (OFString *)host
port: (uint16_t)port
target: (id)target
selector: (SEL)selector
context: (id)context
{
self = [super init];
@try {
_sourceThread = [sourceThread retain];
_socket = [sock retain];
_host = [host copy];
_port = port;
_target = [target retain];
_selector = selector;
_context = [context retain];
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
# ifdef OF_HAVE_BLOCKS
- (instancetype)initWithSourceThread: (OFThread *)sourceThread
socket: (OFTCPSocket *)sock
host: (OFString *)host
port: (uint16_t)port
block: (of_tcp_socket_async_connect_block_t)block
{
self = [super init];
@try {
_sourceThread = [sourceThread retain];
_socket = [sock 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];
[_context 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 *, id, id) =
(void (*)(id, SEL, OFTCPSocket *, id, id))
[_target methodForSelector: _selector];
func(_target, _selector, _socket, _context, _exception);
# ifdef OF_HAVE_BLOCKS
}
# endif
}
- (id)main
{
void *pool = objc_autoreleasePoolPush();
@try {
[_socket connectToHost: _host
port: _port];
} @catch (id e) {
_exception = [e retain];
}
[self performSelector: @selector(didConnect)
onThread: _sourceThread
waitUntilDone: false];
objc_autoreleasePoolPop(pool);
return nil;
}
@end
#endif
@implementation OFTCPSocket
@synthesize SOCKS5Host = _SOCKS5Host, SOCKS5Port = _SOCKS5Port;
+ (void)setSOCKS5Host: (OFString *)host
{
id old = defaultSOCKS5Host;
defaultSOCKS5Host = [host copy];
[old release];
}
+ (OFString *)SOCKS5Host
{
return defaultSOCKS5Host;
}
+ (void)setSOCKS5Port: (uint16_t)port
{
defaultSOCKS5Port = port;
}
+ (uint16_t)SOCKS5Port
{
return defaultSOCKS5Port;
}
- (instancetype)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)connectToHost: (OFString *)host
port: (uint16_t)port
{
OFString *destinationHost = host;
uint16_t destinationPort = port;
of_resolver_result_t **results, **iter;
int errNo = 0;
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 SOCK_CLOEXEC == 0 && defined(HAVE_FCNTL) && defined(FD_CLOEXEC)
int flags;
#endif
if ((_socket = socket(result->family,
result->type | SOCK_CLOEXEC,
result->protocol)) == INVALID_SOCKET) {
errNo = of_socket_errno();
continue;
}
#if SOCK_CLOEXEC == 0 && defined(HAVE_FCNTL) && defined(FD_CLOEXEC)
if ((flags = fcntl(_socket, F_GETFD, 0)) != -1)
fcntl(_socket, F_SETFD, flags | FD_CLOEXEC);
#endif
if (connect(_socket, result->address,
result->addressLength) == -1) {
errNo = of_socket_errno();
closesocket(_socket);
_socket = INVALID_SOCKET;
continue;
}
break;
}
of_resolver_free(results);
if (_socket == INVALID_SOCKET)
@throw [OFConnectionFailedException exceptionWithHost: host
port: port
socket: self
errNo: errNo];
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
context: (id)context
{
void *pool = objc_autoreleasePoolPush();
[[[[OFTCPSocket_ConnectThread alloc]
initWithSourceThread: [OFThread currentThread]
socket: self
host: host
port: port
target: target
selector: selector
context: context] 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;
#if !defined(OF_WII) && !defined(OF_NINTENDO_3DS)
union {
struct sockaddr_storage storage;
struct sockaddr_in in;
# ifdef HAVE_IPV6
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];
results = of_resolve_host(host, port, SOCK_STREAM);
@try {
#if SOCK_CLOEXEC == 0 && defined(HAVE_FCNTL) && defined(FD_CLOEXEC)
int flags;
#endif
if ((_socket = socket(results[0]->family,
results[0]->type | SOCK_CLOEXEC,
results[0]->protocol)) == INVALID_SOCKET)
@throw [OFBindFailedException
exceptionWithHost: host
port: port
socket: self
errNo: of_socket_errno()];
#if SOCK_CLOEXEC == 0 && defined(HAVE_FCNTL) && defined(FD_CLOEXEC)
if ((flags = fcntl(_socket, F_GETFD, 0)) != -1)
fcntl(_socket, F_SETFD, flags | FD_CLOEXEC);
#endif
setsockopt(_socket, SOL_SOCKET, SO_REUSEADDR,
(const char *)&one, (socklen_t)sizeof(one));
#if defined(OF_WII) || defined(OF_NINTENDO_3DS)
if (port != 0) {
#endif
if (bind(_socket, results[0]->address,
results[0]->addressLength) != 0) {
int errNo = of_socket_errno();
closesocket(_socket);
_socket = INVALID_SOCKET;
@throw [OFBindFailedException
exceptionWithHost: host
port: port
socket: self
errNo: errNo];
}
#if defined(OF_WII) || defined(OF_NINTENDO_3DS)
} else {
for (;;) {
uint16_t rnd = 0;
int ret;
while (rnd < 1024)
rnd = (uint16_t)rand();
switch (results[0]->family) {
case AF_INET:
((struct sockaddr_in *)
results[0]->address)->sin_port =
OF_BSWAP16_IF_LE(rnd);
break;
# ifdef HAVE_IPV6
case AF_INET6:
((struct sockaddr_in6 *)
results[0]->address)->sin6_port =
OF_BSWAP16_IF_LE(rnd);
break;
# endif
default:
@throw [OFInvalidArgumentException
exception];
}
ret = bind(_socket, results[0]->address,
results[0]->addressLength);
if (ret == 0) {
port = rnd;
break;
}
if (of_socket_errno() != EADDRINUSE) {
int errNo = of_socket_errno();
closesocket(_socket);
_socket = INVALID_SOCKET;
@throw [OFBindFailedException
exceptionWithHost: host
port: port
socket: self
errNo: errNo];
}
}
}
#endif
} @finally {
of_resolver_free(results);
}
if (port > 0)
return port;
#if !defined(OF_WII) && !defined(OF_NINTENDO_3DS)
addrLen = (socklen_t)sizeof(addr.storage);
if (of_getsockname(_socket, (struct sockaddr *)&addr.storage,
&addrLen) != 0) {
int errNo = of_socket_errno();
closesocket(_socket);
_socket = INVALID_SOCKET;
@throw [OFBindFailedException exceptionWithHost: host
port: port
socket: self
errNo: errNo];
}
if (addr.storage.ss_family == AF_INET)
return OF_BSWAP16_IF_LE(addr.in.sin_port);
# ifdef HAVE_IPV6
if (addr.storage.ss_family == AF_INET6)
return OF_BSWAP16_IF_LE(addr.in6.sin6_port);
# endif
#endif
closesocket(_socket);
_socket = INVALID_SOCKET;
@throw [OFBindFailedException exceptionWithHost: host
port: port
socket: self
errNo: EAFNOSUPPORT];
}
- (void)listen
{
[self listenWithBackLog: SOMAXCONN];
}
- (void)listenWithBackLog: (int)backLog
{
if (_socket == INVALID_SOCKET)
@throw [OFNotOpenException exceptionWithObject: self];
if (listen(_socket, backLog) == -1)
@throw [OFListenFailedException
exceptionWithSocket: self
backLog: backLog
errNo: of_socket_errno()];
_listening = true;
}
- (instancetype)accept
{
OFTCPSocket *client = [[[[self class] alloc] init] autorelease];
#if (!defined(HAVE_PACCEPT) && !defined(HAVE_ACCEPT4)) || !defined(SOCK_CLOEXEC)
# if defined(HAVE_FCNTL) && defined(FD_CLOEXEC)
int flags;
# endif
#endif
client->_address = [client
allocMemoryWithSize: sizeof(struct sockaddr_storage)];
client->_addressLength = (socklen_t)sizeof(struct sockaddr_storage);
#if defined(HAVE_PACCEPT) && defined(SOCK_CLOEXEC)
if ((client->_socket = paccept(_socket, client->_address,
&client->_addressLength, NULL, SOCK_CLOEXEC)) == INVALID_SOCKET)
@throw [OFAcceptFailedException
exceptionWithSocket: self
errNo: of_socket_errno()];
#elif defined(HAVE_ACCEPT4) && defined(SOCK_CLOEXEC)
if ((client->_socket = accept4(_socket, client->_address,
&client->_addressLength, SOCK_CLOEXEC)) == INVALID_SOCKET)
@throw [OFAcceptFailedException
exceptionWithSocket: self
errNo: of_socket_errno()];
#else
if ((client->_socket = accept(_socket, client->_address,
&client->_addressLength)) == INVALID_SOCKET)
@throw [OFAcceptFailedException
exceptionWithSocket: self
errNo: of_socket_errno()];
# if defined(HAVE_FCNTL) && defined(FD_CLOEXEC)
if ((flags = fcntl(client->_socket, F_GETFD, 0)) != -1)
fcntl(client->_socket, F_SETFD, flags | FD_CLOEXEC);
# endif
#endif
assert(client->_addressLength <=
(socklen_t)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
context: (id)context
{
[OFRunLoop of_addAsyncAcceptForTCPSocket: self
target: target
selector: selector
context: context];
}
#ifdef OF_HAVE_BLOCKS
- (void)asyncAcceptWithBlock: (of_tcp_socket_async_accept_block_t)block
{
[OFRunLoop of_addAsyncAcceptForTCPSocket: self
block: block];
}
#endif
- (OFString *)remoteAddress
{
OFString *ret;
if (_socket == INVALID_SOCKET)
@throw [OFNotOpenException exceptionWithObject: self];
if (_address == NULL)
@throw [OFInvalidArgumentException exception];
of_address_to_string_and_port(_address, _addressLength, &ret, NULL);
return ret;
}
- (bool)isListening
{
return _listening;
}
#if !defined(OF_WII) && !defined(OF_NINTENDO_3DS)
- (void)setKeepAliveEnabled: (bool)enabled
{
int v = enabled;
if (setsockopt(_socket, SOL_SOCKET, SO_KEEPALIVE,
(char *)&v, (socklen_t)sizeof(v)) != 0)
@throw [OFSetOptionFailedException
exceptionWithStream: self
errNo: of_socket_errno()];
}
- (bool)isKeepAliveEnabled
{
int v;
socklen_t len = sizeof(v);
if (getsockopt(_socket, SOL_SOCKET, SO_KEEPALIVE,
(char *)&v, &len) != 0 || len != sizeof(v))
@throw [OFGetOptionFailedException
exceptionWithStream: self
errNo: of_socket_errno()];
return v;
}
#endif
#ifndef OF_WII
- (void)setTCPNoDelayEnabled: (bool)enabled
{
int v = enabled;
if (setsockopt(_socket, IPPROTO_TCP, TCP_NODELAY,
(char *)&v, (socklen_t)sizeof(v)) != 0)
@throw [OFSetOptionFailedException
exceptionWithStream: self
errNo: of_socket_errno()];
}
- (bool)isTCPNoDelayEnabled
{
int v;
socklen_t len = sizeof(v);
if (getsockopt(_socket, IPPROTO_TCP, TCP_NODELAY,
(char *)&v, &len) != 0 || len != sizeof(v))
@throw [OFGetOptionFailedException
exceptionWithStream: self
errNo: of_socket_errno()];
return v;
}
#endif
- (void)close
{
_listening = false;
[self freeMemory: _address];
_address = NULL;
_addressLength = 0;
#ifdef OF_WII
_port = 0;
#endif
[super close];
}
@end