/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
* 2018, 2019, 2020
* 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.
*
* 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"
#include <assert.h>
#include <errno.h>
#include <string.h>
#ifdef HAVE_FCNTL_H
# include <fcntl.h>
#endif
#import "OFUDPSocket.h"
#import "OFUDPSocket+Private.h"
#import "OFDNSResolver.h"
#import "OFData.h"
#import "OFRunLoop+Private.h"
#import "OFRunLoop.h"
#import "OFThread.h"
#import "OFAlreadyConnectedException.h"
#import "OFBindFailedException.h"
#import "OFInitializationFailedException.h"
#import "OFInvalidArgumentException.h"
#import "OFInvalidFormatException.h"
#import "OFNotOpenException.h"
#import "OFOutOfRangeException.h"
#import "OFReadFailedException.h"
#import "OFSetOptionFailedException.h"
#import "OFWriteFailedException.h"
#import "socket.h"
#import "socket_helpers.h"
@implementation OFUDPSocket
@synthesize delegate = _delegate;
+ (void)initialize
{
if (self != [OFUDPSocket class])
return;
if (!of_socket_init())
@throw [OFInitializationFailedException
exceptionWithClass: self];
}
+ (instancetype)socket
{
return [[[self alloc] init] autorelease];
}
- (instancetype)init
{
self = [super init];
_socket = INVALID_SOCKET;
_blocking = true;
return self;
}
- (void)dealloc
{
if (_socket != INVALID_SOCKET)
[self close];
[super dealloc];
}
- (id)copy
{
return [self retain];
}
- (bool)isBlocking
{
return _blocking;
}
- (void)setBlocking: (bool)enable
{
#if defined(HAVE_FCNTL)
int flags = fcntl(_socket, F_GETFL, 0);
if (flags == -1)
@throw [OFSetOptionFailedException exceptionWithObject: self
errNo: errno];
if (enable)
flags &= ~O_NONBLOCK;
else
flags |= O_NONBLOCK;
if (fcntl(_socket, F_SETFL, flags) == -1)
@throw [OFSetOptionFailedException exceptionWithObject: self
errNo: errno];
_blocking = enable;
#elif defined(OF_WINDOWS)
u_long v = enable;
if (ioctlsocket(_socket, FIONBIO, &v) == SOCKET_ERROR)
@throw [OFSetOptionFailedException
exceptionWithObject: self
errNo: of_socket_errno()];
_blocking = enable;
#else
OF_UNRECOGNIZED_SELECTOR
#endif
}
- (uint16_t)of_bindToAddress: (of_socket_address_t *)address
extraType: (int)extraType
{
void *pool = objc_autoreleasePoolPush();
OFString *host;
uint16_t port;
#if SOCK_CLOEXEC == 0 && defined(HAVE_FCNTL) && defined(FD_CLOEXEC)
int flags;
#endif
if ((_socket = socket(address->sockaddr.sockaddr.sa_family,
SOCK_DGRAM | SOCK_CLOEXEC | extraType, 0)) == INVALID_SOCKET) {
host = of_socket_address_ip_string(address, &port);
@throw [OFBindFailedException
exceptionWithHost: host
port: port
socket: self
errNo: of_socket_errno()];
}
_blocking = true;
#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 defined(OF_WII) || defined(OF_NINTENDO_3DS)
if (of_socket_address_get_port(address) != 0) {
#endif
if (bind(_socket, &address->sockaddr.sockaddr,
address->length) != 0) {
int errNo = of_socket_errno();
closesocket(_socket);
_socket = INVALID_SOCKET;
host = of_socket_address_ip_string(address, &port);
@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();
of_socket_address_set_port(address, rnd);
if ((ret = bind(_socket, &address->sockaddr.sockaddr,
address->length)) == 0) {
port = rnd;
break;
}
if (of_socket_errno() != EADDRINUSE) {
int errNo = of_socket_errno();
closesocket(_socket);
_socket = INVALID_SOCKET;
host = of_socket_address_ip_string(
address, &port);
@throw [OFBindFailedException
exceptionWithHost: host
port: port
socket: self
errNo: errNo];
}
}
}
#endif
objc_autoreleasePoolPop(pool);
if ((port = of_socket_address_get_port(address)) > 0)
return port;
#if !defined(OF_WII) && !defined(OF_NINTENDO_3DS)
memset(address, 0, sizeof(*address));
address->length = (socklen_t)sizeof(address->sockaddr);
if (of_getsockname(_socket, &address->sockaddr.sockaddr,
&address->length) != 0) {
int errNo = of_socket_errno();
closesocket(_socket);
_socket = INVALID_SOCKET;
host = of_socket_address_ip_string(address, &port);
@throw [OFBindFailedException exceptionWithHost: host
port: port
socket: self
errNo: errNo];
}
if (address->sockaddr.sockaddr.sa_family == AF_INET)
return OF_BSWAP16_IF_LE(address->sockaddr.in.sin_port);
# ifdef OF_HAVE_IPV6
else if (address->sockaddr.sockaddr.sa_family == AF_INET6)
return OF_BSWAP16_IF_LE(address->sockaddr.in6.sin6_port);
# endif
else {
closesocket(_socket);
_socket = INVALID_SOCKET;
host = of_socket_address_ip_string(address, &port);
@throw [OFBindFailedException exceptionWithHost: host
port: port
socket: self
errNo: EAFNOSUPPORT];
}
#else
closesocket(_socket);
_socket = INVALID_SOCKET;
host = of_socket_address_ip_string(address, &port);
@throw [OFBindFailedException exceptionWithHost: host
port: port
socket: self
errNo: EADDRNOTAVAIL];
#endif
}
- (uint16_t)bindToHost: (OFString *)host
port: (uint16_t)port
{
void *pool = objc_autoreleasePoolPush();
OFData *socketAddresses;
of_socket_address_t address;
if (_socket != INVALID_SOCKET)
@throw [OFAlreadyConnectedException exceptionWithSocket: self];
socketAddresses = [[OFThread DNSResolver]
resolveAddressesForHost: host
addressFamily: OF_SOCKET_ADDRESS_FAMILY_ANY];
address = *(of_socket_address_t *)[socketAddresses itemAtIndex: 0];
of_socket_address_set_port(&address, port);
port = [self of_bindToAddress: &address
extraType: 0];
objc_autoreleasePoolPop(pool);
return port;
}
- (size_t)receiveIntoBuffer: (void *)buffer
length: (size_t)length
sender: (of_socket_address_t *)sender
{
ssize_t ret;
if (_socket == INVALID_SOCKET)
@throw [OFNotOpenException exceptionWithObject: self];
sender->length = (socklen_t)sizeof(sender->sockaddr);
#ifndef OF_WINDOWS
if ((ret = recvfrom(_socket, buffer, length, 0,
&sender->sockaddr.sockaddr, &sender->length)) < 0)
@throw [OFReadFailedException
exceptionWithObject: self
requestedLength: length
errNo: of_socket_errno()];
#else
if (length > INT_MAX)
@throw [OFOutOfRangeException exception];
if ((ret = recvfrom(_socket, buffer, (int)length, 0,
&sender->sockaddr.sockaddr, &sender->length)) < 0)
@throw [OFReadFailedException
exceptionWithObject: self
requestedLength: length
errNo: of_socket_errno()];
#endif
switch (sender->sockaddr.sockaddr.sa_family) {
case AF_INET:
sender->family = OF_SOCKET_ADDRESS_FAMILY_IPV4;
break;
#ifdef OF_HAVE_IPV6
case AF_INET6:
sender->family = OF_SOCKET_ADDRESS_FAMILY_IPV6;
break;
#endif
default:
sender->family = OF_SOCKET_ADDRESS_FAMILY_UNKNOWN;
break;
}
return ret;
}
- (void)asyncReceiveIntoBuffer: (void *)buffer
length: (size_t)length
{
[self asyncReceiveIntoBuffer: buffer
length: length
runLoopMode: of_run_loop_mode_default];
}
- (void)asyncReceiveIntoBuffer: (void *)buffer
length: (size_t)length
runLoopMode: (of_run_loop_mode_t)runLoopMode
{
[OFRunLoop of_addAsyncReceiveForUDPSocket: self
buffer: buffer
length: length
mode: runLoopMode
# ifdef OF_HAVE_BLOCKS
block: NULL
# endif
delegate: _delegate];
}
#ifdef OF_HAVE_BLOCKS
- (void)asyncReceiveIntoBuffer: (void *)buffer
length: (size_t)length
block: (of_udp_socket_async_receive_block_t)block
{
[self asyncReceiveIntoBuffer: buffer
length: length
runLoopMode: of_run_loop_mode_default
block: block];
}
- (void)asyncReceiveIntoBuffer: (void *)buffer
length: (size_t)length
runLoopMode: (of_run_loop_mode_t)runLoopMode
block: (of_udp_socket_async_receive_block_t)block
{
[OFRunLoop of_addAsyncReceiveForUDPSocket: self
buffer: buffer
length: length
mode: runLoopMode
block: block
delegate: nil];
}
#endif
- (void)sendBuffer: (const void *)buffer
length: (size_t)length
receiver: (const of_socket_address_t *)receiver
{
if (_socket == INVALID_SOCKET)
@throw [OFNotOpenException exceptionWithObject: self];
#ifndef OF_WINDOWS
ssize_t bytesWritten;
if (length > SSIZE_MAX)
@throw [OFOutOfRangeException exception];
if ((bytesWritten = sendto(_socket, (void *)buffer, length, 0,
(struct sockaddr *)&receiver->sockaddr.sockaddr,
receiver->length)) < 0)
@throw [OFWriteFailedException
exceptionWithObject: self
requestedLength: length
bytesWritten: 0
errNo: of_socket_errno()];
#else
int bytesWritten;
if (length > INT_MAX)
@throw [OFOutOfRangeException exception];
if ((bytesWritten = sendto(_socket, buffer, (int)length, 0,
&receiver->sockaddr.sockaddr, receiver->length)) < 0)
@throw [OFWriteFailedException
exceptionWithObject: self
requestedLength: length
bytesWritten: 0
errNo: of_socket_errno()];
#endif
if ((size_t)bytesWritten != length)
@throw [OFWriteFailedException exceptionWithObject: self
requestedLength: length
bytesWritten: bytesWritten
errNo: 0];
}
- (void)asyncSendData: (OFData *)data
receiver: (const of_socket_address_t *)receiver
{
[self asyncSendData: data
receiver: receiver
runLoopMode: of_run_loop_mode_default];
}
- (void)asyncSendData: (OFData *)data
receiver: (const of_socket_address_t *)receiver
runLoopMode: (of_run_loop_mode_t)runLoopMode
{
[OFRunLoop of_addAsyncSendForUDPSocket: self
data: data
receiver: receiver
mode: runLoopMode
# ifdef OF_HAVE_BLOCKS
block: NULL
# endif
delegate: _delegate];
}
#ifdef OF_HAVE_BLOCKS
- (void)asyncSendData: (OFData *)data
receiver: (const of_socket_address_t *)receiver
block: (of_udp_socket_async_send_data_block_t)block
{
[self asyncSendData: data
receiver: receiver
runLoopMode: of_run_loop_mode_default
block: block];
}
- (void)asyncSendData: (OFData *)data
receiver: (const of_socket_address_t *)receiver
runLoopMode: (of_run_loop_mode_t)runLoopMode
block: (of_udp_socket_async_send_data_block_t)block
{
[OFRunLoop of_addAsyncSendForUDPSocket: self
data: data
receiver: receiver
mode: runLoopMode
block: block
delegate: nil];
}
#endif
- (void)cancelAsyncRequests
{
[OFRunLoop of_cancelAsyncRequestsForObject: self
mode: of_run_loop_mode_default];
}
- (int)fileDescriptorForReading
{
#ifndef OF_WINDOWS
return _socket;
#else
if (_socket == INVALID_SOCKET)
return -1;
if (_socket > INT_MAX)
@throw [OFOutOfRangeException exception];
return (int)_socket;
#endif
}
- (int)fileDescriptorForWriting
{
#ifndef OF_WINDOWS
return _socket;
#else
if (_socket == INVALID_SOCKET)
return -1;
if (_socket > INT_MAX)
@throw [OFOutOfRangeException exception];
return (int)_socket;
#endif
}
- (void)close
{
if (_socket == INVALID_SOCKET)
@throw [OFNotOpenException exceptionWithObject: self];
closesocket(_socket);
_socket = INVALID_SOCKET;
}
@end