/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012
* 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.
*/
#include "config.h"
#define __NO_EXT_QNX
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <assert.h>
#ifndef _WIN32
# include <netinet/in.h>
# include <arpa/inet.h>
# include <netdb.h>
#endif
#import "OFTCPSocket.h"
#import "OFTCPSocket+SOCKS5.h"
#import "OFString.h"
#import "OFAcceptFailedException.h"
#import "OFAlreadyConnectedException.h"
#import "OFAddressTranslationFailedException.h"
#import "OFBindFailedException.h"
#import "OFConnectionFailedException.h"
#import "OFInvalidArgumentException.h"
#import "OFListenFailedException.h"
#import "OFNotConnectedException.h"
#import "OFNotImplementedException.h"
#import "OFSetOptionFailedException.h"
#import "macros.h"
#ifndef INVALID_SOCKET
# define INVALID_SOCKET -1
#endif
#if defined(OF_THREADS) && !defined(HAVE_THREADSAFE_GETADDRINFO)
# import "OFThread.h"
# import "OFDataArray.h"
static OFMutex *mutex = nil;
#endif
#ifdef _WIN32
# define close(sock) closesocket(sock)
#endif
/* References for static linking */
void _references_to_categories_of_OFTCPSocket(void)
{
_OFTCPSocket_SOCKS5_reference = 1;
}
static OFString *defaultSOCKS5Host = nil;
static uint16_t defaultSOCKS5Port = 1080;
@implementation OFTCPSocket
#if defined(OF_THREADS) && !defined(HAVE_THREADSAFE_GETADDRINFO)
+ (void)initialize
{
if (self == [OFTCPSocket class])
mutex = [[OFMutex alloc] init];
}
#endif
+ (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 {
sock = INVALID_SOCKET;
sockAddr = NULL;
SOCKS5Host = [defaultSOCKS5Host copy];
SOCKS5Port = defaultSOCKS5Port;
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (void)dealloc
{
[SOCKS5Host release];
[super dealloc];
}
- (void)setSOCKS5Host: (OFString*)host
{
OF_SETTER(SOCKS5Host, host, YES, YES)
}
- (OFString*)SOCKS5Host
{
OF_GETTER(SOCKS5Host, YES)
}
- (void)setSOCKS5Port: (uint16_t)port
{
SOCKS5Port = port;
}
- (uint16_t)SOCKS5Port
{
return SOCKS5Port;
}
- (void)connectToHost: (OFString*)host
port: (uint16_t)port
{
OFString *destinationHost = host;
uint16_t destinationPort = port;
if (sock != INVALID_SOCKET)
@throw [OFAlreadyConnectedException exceptionWithClass: isa
socket: self];
if (SOCKS5Host != nil) {
/* Connect to the SOCKS5 proxy instead */
host = SOCKS5Host;
port = SOCKS5Port;
}
#ifdef HAVE_THREADSAFE_GETADDRINFO
struct addrinfo hints, *res, *res0;
char portCString[7];
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
snprintf(portCString, 7, "%" PRIu16, port);
if (getaddrinfo([host cStringWithEncoding: OF_STRING_ENCODING_NATIVE],
portCString, &hints, &res0))
@throw [OFAddressTranslationFailedException
exceptionWithClass: isa
socket: self
host: host];
for (res = res0; res != NULL; res = res->ai_next) {
if ((sock = socket(res->ai_family, res->ai_socktype,
res->ai_protocol)) == INVALID_SOCKET)
continue;
if (connect(sock, res->ai_addr, res->ai_addrlen) == -1) {
close(sock);
sock = INVALID_SOCKET;
continue;
}
break;
}
freeaddrinfo(res0);
#else
BOOL connected = NO;
struct hostent *he;
struct sockaddr_in addr;
char **ip;
# ifdef OF_THREADS
OFDataArray *addrlist;
addrlist = [[OFDataArray alloc] initWithItemSize: sizeof(char**)];
[mutex lock];
# endif
if ((he = gethostbyname([host cStringWithEncoding:
OF_STRING_ENCODING_NATIVE])) == NULL) {
# ifdef OF_THREADS
[addrlist release];
[mutex unlock];
# endif
@throw [OFAddressTranslationFailedException
exceptionWithClass: isa
socket: self
host: host];
}
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = of_bswap16_if_le(port);
if (he->h_addrtype != AF_INET ||
(sock = socket(AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) {
# ifdef OF_THREADS
[addrlist release];
[mutex unlock];
# endif
@throw [OFConnectionFailedException exceptionWithClass: isa
socket: self
host: host
port: port];
}
# ifdef OF_THREADS
@try {
for (ip = he->h_addr_list; *ip != NULL; ip++)
[addrlist addItem: ip];
/* Add the terminating NULL */
[addrlist addItem: ip];
} @catch (id e) {
[addrlist release];
@throw e;
} @finally {
[mutex unlock];
}
for (ip = [addrlist cArray]; *ip != NULL; ip++) {
# else
for (ip = he->h_addr_list; *ip != NULL; ip++) {
# endif
memcpy(&addr.sin_addr.s_addr, *ip, he->h_length);
if (connect(sock, (struct sockaddr*)&addr, sizeof(addr)) == -1)
continue;
connected = YES;
break;
}
# ifdef OF_THREADS
[addrlist release];
# endif
if (!connected) {
close(sock);
sock = INVALID_SOCKET;
}
#endif
if (sock == INVALID_SOCKET)
@throw [OFConnectionFailedException exceptionWithClass: isa
socket: self
host: host
port: port];
if (SOCKS5Host != nil)
[self _SOCKS5ConnectToHost: destinationHost
port: destinationPort];
}
- (uint16_t)bindToHost: (OFString*)host
port: (uint16_t)port
{
union {
struct sockaddr_storage storage;
struct sockaddr_in in;
struct sockaddr_in6 in6;
} addr;
socklen_t addrLen;
if (sock != INVALID_SOCKET)
@throw [OFAlreadyConnectedException exceptionWithClass: isa
socket: self];
if (SOCKS5Host != nil)
@throw [OFNotImplementedException exceptionWithClass: isa
selector: _cmd];
#ifdef HAVE_THREADSAFE_GETADDRINFO
struct addrinfo hints, *res;
char portCString[7];
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
snprintf(portCString, 7, "%" PRIu16, port);
if (getaddrinfo([host cStringWithEncoding: OF_STRING_ENCODING_NATIVE],
portCString, &hints, &res))
@throw [OFAddressTranslationFailedException
exceptionWithClass: isa
socket: self
host: host];
if ((sock = socket(res->ai_family, SOCK_STREAM, 0)) == INVALID_SOCKET)
@throw [OFBindFailedException exceptionWithClass: isa
socket: self
host: host
port: port];
if (bind(sock, res->ai_addr, res->ai_addrlen) == -1) {
freeaddrinfo(res);
close(sock);
sock = INVALID_SOCKET;
@throw [OFBindFailedException exceptionWithClass: isa
socket: self
host: host
port: port];
}
freeaddrinfo(res);
#else
struct hostent *he;
# ifdef OF_THREADS
[mutex lock];
# endif
if ((he = gethostbyname([host cStringWithEncoding:
OF_STRING_ENCODING_NATIVE])) == NULL) {
# ifdef OF_THREADS
[mutex unlock];
# endif
@throw [OFAddressTranslationFailedException
exceptionWithClass: isa
socket: self
host: host];
}
memset(&addr, 0, sizeof(addr));
addr.in.sin_family = AF_INET;
addr.in.sin_port = of_bswap16_if_le(port);
if (he->h_addrtype != AF_INET || he->h_addr_list[0] == NULL) {
# ifdef OF_THREADS
[mutex unlock];
# endif
@throw [OFAddressTranslationFailedException
exceptionWithClass: isa
socket: self
host: host];
}
memcpy(&addr.in.sin_addr.s_addr, he->h_addr_list[0], he->h_length);
# ifdef OF_THREADS
[mutex unlock];
# endif
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
@throw [OFBindFailedException exceptionWithClass: isa
socket: self
host: host
port: port];
if (bind(sock, (struct sockaddr*)&addr.in, sizeof(addr.in)) == -1) {
close(sock);
sock = INVALID_SOCKET;
@throw [OFBindFailedException exceptionWithClass: isa
socket: self
host: host
port: port];
}
#endif
if (port > 0)
return port;
addrLen = sizeof(addr.storage);
if (getsockname(sock, (struct sockaddr*)&addr, &addrLen)) {
close(sock);
sock = INVALID_SOCKET;
@throw [OFBindFailedException exceptionWithClass: isa
socket: self
host: host
port: port];
}
if (addr.storage.ss_family == AF_INET)
return of_bswap16_if_le(addr.in.sin_port);
if (addr.storage.ss_family == AF_INET6)
return of_bswap16_if_le(addr.in6.sin6_port);
close(sock);
sock = INVALID_SOCKET;
@throw [OFBindFailedException exceptionWithClass: isa
socket: self
host: host
port: port];
}
- (void)listenWithBackLog: (int)backLog
{
if (sock == INVALID_SOCKET)
@throw [OFNotConnectedException exceptionWithClass: isa
socket: self];
if (listen(sock, backLog) == -1)
@throw [OFListenFailedException exceptionWithClass: isa
socket: self
backLog: backLog];
listening = YES;
}
- (void)listen
{
if (sock == INVALID_SOCKET)
@throw [OFNotConnectedException exceptionWithClass: isa
socket: self];
if (listen(sock, 5) == -1)
@throw [OFListenFailedException exceptionWithClass: isa
socket: self
backLog: 5];
listening = YES;
}
- (OFTCPSocket*)accept
{
OFTCPSocket *newSocket;
struct sockaddr_storage *addr;
socklen_t addrLen;
int newSock;
newSocket = [[[isa alloc] init] autorelease];
addrLen = sizeof(struct sockaddr);
@try {
addr = [newSocket allocMemoryWithSize: sizeof(struct sockaddr)];
} @catch (id e) {
[newSocket release];
@throw e;
}
if ((newSock = accept(sock, (struct sockaddr*)addr,
&addrLen)) == INVALID_SOCKET) {
[newSocket release];
@throw [OFAcceptFailedException exceptionWithClass: isa
socket: self];
}
newSocket->sock = newSock;
newSocket->sockAddr = addr;
newSocket->sockAddrLen = addrLen;
return newSocket;
}
- (void)setKeepAlivesEnabled: (BOOL)enable
{
int v = enable;
if (setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (char*)&v, sizeof(v)))
@throw [OFSetOptionFailedException exceptionWithClass: isa
stream: self];
}
- (OFString*)remoteAddress
{
char *host;
if (sockAddr == NULL || sockAddrLen == 0)
@throw [OFInvalidArgumentException exceptionWithClass: isa
selector: _cmd];
#ifdef HAVE_THREADSAFE_GETADDRINFO
host = [self allocMemoryWithSize: NI_MAXHOST];
@try {
if (getnameinfo((struct sockaddr*)sockAddr, sockAddrLen, host,
NI_MAXHOST, NULL, 0, NI_NUMERICHOST))
@throw [OFAddressTranslationFailedException
exceptionWithClass: isa];
return [OFString stringWithCString: host
encoding: OF_STRING_ENCODING_NATIVE];
} @finally {
[self freeMemory: host];
}
#else
# ifdef OF_THREADS
[mutex lock];
@try {
# endif
host = inet_ntoa(((struct sockaddr_in*)sockAddr)->sin_addr);
if (host == NULL)
@throw [OFAddressTranslationFailedException
exceptionWithClass: isa];
return [OFString stringWithCString: host
encoding: OF_STRING_ENCODING_NATIVE];
# ifdef OF_THREADS
} @finally {
[mutex unlock];
}
# endif
#endif
/* Get rid of a warning, never reached anyway */
assert(0);
}
- (BOOL)isListening
{
return listening;
}
- (void)close
{
[super close];
listening = NO;
[self freeMemory: sockAddr];
sockAddr = NULL;
sockAddrLen = 0;
}
@end