/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017
* 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.
*/
#include "config.h"
#include <assert.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#import "OFUDPSocket.h"
#ifdef OF_HAVE_THREADS
# import "OFThread.h"
#endif
#import "OFRunLoop.h"
#import "OFRunLoop+Private.h"
#import "OFBindFailedException.h"
#import "OFInitializationFailedException.h"
#import "OFInvalidArgumentException.h"
#import "OFNotOpenException.h"
#import "OFOutOfRangeException.h"
#import "OFReadFailedException.h"
#import "OFWriteFailedException.h"
#import "socket.h"
#import "socket_helpers.h"
#import "resolver.h"
#ifdef OF_HAVE_THREADS
@interface OFUDPSocket_ResolveThread: OFThread
{
OFThread *_sourceThread;
OFString *_host;
uint16_t _port;
id _target;
SEL _selector;
# ifdef OF_HAVE_BLOCKS
of_udp_socket_async_resolve_block_t _block;
# endif
of_udp_socket_address_t _address;
OFException *_exception;
}
- initWithSourceThread: (OFThread*)sourceThread
host: (OFString*)host
port: (uint16_t)port
target: (id)target
selector: (SEL)selector;
# ifdef OF_HAVE_BLOCKS
- initWithSourceThread: (OFThread*)sourceThread
host: (OFString*)host
port: (uint16_t)port
block: (of_udp_socket_async_resolve_block_t)block;
# endif
@end
@implementation OFUDPSocket_ResolveThread
- initWithSourceThread: (OFThread*)sourceThread
host: (OFString*)host
port: (uint16_t)port
target: (id)target
selector: (SEL)selector
{
self = [super init];
@try {
_sourceThread = [sourceThread retain];
_host = [host retain];
_port = port;
_target = [target retain];
_selector = selector;
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
# ifdef OF_HAVE_BLOCKS
- initWithSourceThread: (OFThread*)sourceThread
host: (OFString*)host
port: (uint16_t)port
block: (of_udp_socket_async_resolve_block_t)block
{
self = [super init];
@try {
_sourceThread = [sourceThread retain];
_host = [host copy];
_port = port;
_block = [block copy];
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
# endif
- (void)dealloc
{
[_sourceThread release];
[_host release];
[_target release];
# ifdef OF_HAVE_BLOCKS
[_block release];
# endif
[_exception release];
[super dealloc];
}
- (void)didResolve
{
[self join];
# ifdef OF_HAVE_BLOCKS
if (_block != NULL)
_block(_host, _port, _address, _exception);
else {
# endif
void (*func)(id, SEL, OFString*, uint16_t,
of_udp_socket_address_t, OFException*) =
(void(*)(id, SEL, OFString*, uint16_t,
of_udp_socket_address_t, OFException*))[_target
methodForSelector: _selector];
func(_target, _selector, _host, _port, _address, _exception);
# ifdef OF_HAVE_BLOCKS
}
# endif
}
- (id)main
{
void *pool = objc_autoreleasePoolPush();
@try {
[OFUDPSocket resolveAddressForHost: _host
port: _port
address: &_address];
} @catch (OFException *e) {
_exception = e;
}
[self performSelector: @selector(didResolve)
onThread: _sourceThread
waitUntilDone: false];
objc_autoreleasePoolPop(pool);
return nil;
}
@end
#endif
bool
of_udp_socket_address_equal(of_udp_socket_address_t *address1,
of_udp_socket_address_t *address2)
{
struct sockaddr_in *sin_1, *sin_2;
#ifdef HAVE_IPV6
struct sockaddr_in6 *sin6_1, *sin6_2;
#endif
if (address1->address.ss_family != address2->address.ss_family)
return false;
switch (address1->address.ss_family) {
case AF_INET:
#if !defined(OF_WII) && !defined(OF_NINTENDO_3DS)
if (address1->length < (socklen_t)sizeof(struct sockaddr_in) ||
address2->length < (socklen_t)sizeof(struct sockaddr_in))
@throw [OFInvalidArgumentException exception];
#else
if (address1->length < 8 || address2->length < 8)
@throw [OFInvalidArgumentException exception];
#endif
sin_1 = (struct sockaddr_in*)&address1->address;
sin_2 = (struct sockaddr_in*)&address2->address;
if (sin_1->sin_port != sin_2->sin_port)
return false;
if (sin_1->sin_addr.s_addr != sin_2->sin_addr.s_addr)
return false;
break;
#ifdef HAVE_IPV6
case AF_INET6:
if (address1->length < sizeof(struct sockaddr_in6) ||
address2->length < sizeof(struct sockaddr_in6))
@throw [OFInvalidArgumentException exception];
sin6_1 = (struct sockaddr_in6*)&address1->address;
sin6_2 = (struct sockaddr_in6*)&address2->address;
if (sin6_1->sin6_port != sin6_2->sin6_port)
return false;
if (memcmp(sin6_1->sin6_addr.s6_addr,
sin6_2->sin6_addr.s6_addr,
sizeof(sin6_1->sin6_addr.s6_addr)) != 0)
return false;
break;
#endif
default:
@throw [OFInvalidArgumentException exception];
}
return true;
}
uint32_t
of_udp_socket_address_hash(of_udp_socket_address_t *address)
{
uint32_t hash = of_hash_seed;
struct sockaddr_in *sin;
#ifdef HAVE_IPV6
struct sockaddr_in6 *sin6;
uint32_t subhash;
#endif
hash += address->address.ss_family;
switch (address->address.ss_family) {
case AF_INET:
#if !defined(OF_WII) && !defined(OF_NINTENDO_3DS)
if (address->length < (socklen_t)sizeof(struct sockaddr_in))
@throw [OFInvalidArgumentException exception];
#else
if (address->length < 8)
@throw [OFInvalidArgumentException exception];
#endif
sin = (struct sockaddr_in*)&address->address;
hash += (sin->sin_port << 1);
hash ^= sin->sin_addr.s_addr;
break;
#ifdef HAVE_IPV6
case AF_INET6:
if (address->length < sizeof(struct sockaddr_in6))
@throw [OFInvalidArgumentException exception];
sin6 = (struct sockaddr_in6*)&address->address;
hash += (sin6->sin6_port << 1);
OF_HASH_INIT(subhash);
for (size_t i = 0; i < sizeof(sin6->sin6_addr.s6_addr); i++)
OF_HASH_ADD(subhash, sin6->sin6_addr.s6_addr[i]);
OF_HASH_FINALIZE(subhash);
hash ^= subhash;
break;
#endif
default:
@throw [OFInvalidArgumentException exception];
}
return hash;
}
@implementation OFUDPSocket
+ (void)initialize
{
if (self != [OFUDPSocket class])
return;
if (!of_socket_init())
@throw [OFInitializationFailedException
exceptionWithClass: self];
}
+ (instancetype)socket
{
return [[[self alloc] init] autorelease];
}
+ (void)resolveAddressForHost: (OFString*)host
port: (uint16_t)port
address: (of_udp_socket_address_t*)address
{
of_resolver_result_t **results =
of_resolve_host(host, port, SOCK_DGRAM);
assert(results[0]->addressLength <=
(socklen_t)sizeof(address->address));
memcpy(&address->address, results[0]->address,
results[0]->addressLength);
address->length = results[0]->addressLength;
of_resolver_free(results);
}
#ifdef OF_HAVE_THREADS
+ (void)asyncResolveAddressForHost: (OFString*)host
port: (uint16_t)port
target: (id)target
selector: (SEL)selector
{
void *pool = objc_autoreleasePoolPush();
[[[[OFUDPSocket_ResolveThread alloc]
initWithSourceThread: [OFThread currentThread]
host: host
port: port
target: target
selector: selector] autorelease] start];
objc_autoreleasePoolPop(pool);
}
# ifdef OF_HAVE_BLOCKS
+ (void)asyncResolveAddressForHost: (OFString*)host
port: (uint16_t)port
block: (of_udp_socket_async_resolve_block_t)block
{
void *pool = objc_autoreleasePoolPush();
[[[[OFUDPSocket_ResolveThread alloc]
initWithSourceThread: [OFThread currentThread]
host: host
port: port
block: block] autorelease] start];
objc_autoreleasePoolPop(pool);
}
# endif
#endif
+ (void)getHost: (OFString *__autoreleasing*)host
andPort: (uint16_t*)port
forAddress: (of_udp_socket_address_t*)address
{
of_address_to_string_and_port(
(struct sockaddr*)&address->address, address->length, host, port);
}
- init
{
self = [super init];
_socket = INVALID_SOCKET;
return self;
}
- (void)dealloc
{
if (_socket != INVALID_SOCKET)
[self close];
[super dealloc];
}
- copy
{
return [self retain];
}
- (uint16_t)bindToHost: (OFString*)host
port: (uint16_t)port
{
of_resolver_result_t **results;
#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
results = of_resolve_host(host, port, SOCK_DGRAM);
@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
#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();
close(_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();
close(_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();
close(_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
close(_socket);
_socket = INVALID_SOCKET;
@throw [OFBindFailedException exceptionWithHost: host
port: port
socket: self
errNo: EAFNOSUPPORT];
}
- (size_t)receiveIntoBuffer: (void*)buffer
length: (size_t)length
sender: (of_udp_socket_address_t*)sender
{
ssize_t ret;
if (_socket == INVALID_SOCKET)
@throw [OFNotOpenException exceptionWithObject: self];
sender->length = (socklen_t)sizeof(sender->address);
#ifndef OF_WINDOWS
if ((ret = recvfrom(_socket, buffer, length, 0,
(struct sockaddr*)&sender->address, &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,
(struct sockaddr*)&sender->address, &sender->length)) < 0)
@throw [OFReadFailedException
exceptionWithObject: self
requestedLength: length
errNo: of_socket_errno()];
#endif
return ret;
}
- (void)asyncReceiveIntoBuffer: (void*)buffer
length: (size_t)length
target: (id)target
selector: (SEL)selector
{
[OFRunLoop OF_addAsyncReceiveForUDPSocket: self
buffer: buffer
length: length
target: target
selector: selector];
}
#ifdef OF_HAVE_BLOCKS
- (void)asyncReceiveIntoBuffer: (void*)buffer
length: (size_t)length
block: (of_udp_socket_async_receive_block_t)block
{
[OFRunLoop OF_addAsyncReceiveForUDPSocket: self
buffer: buffer
length: length
block: block];
}
#endif
- (void)sendBuffer: (const void*)buffer
length: (size_t)length
receiver: (const of_udp_socket_address_t*)receiver
{
if (_socket == INVALID_SOCKET)
@throw [OFNotOpenException exceptionWithObject: self];
#ifndef OF_WINDOWS
if (length > SSIZE_MAX)
@throw [OFOutOfRangeException exception];
if (sendto(_socket, buffer, length, 0,
(struct sockaddr*)&receiver->address,
receiver->length) != (ssize_t)length)
@throw [OFWriteFailedException
exceptionWithObject: self
requestedLength: length
errNo: of_socket_errno()];
#else
if (length > INT_MAX)
@throw [OFOutOfRangeException exception];
if (sendto(_socket, buffer, (int)length, 0,
(struct sockaddr*)&receiver->address,
receiver->length) != (int)length)
@throw [OFWriteFailedException
exceptionWithObject: self
requestedLength: length
errNo: of_socket_errno()];
#endif
}
- (void)cancelAsyncRequests
{
[OFRunLoop OF_cancelAsyncRequestsForObject: self];
}
- (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];
close(_socket);
_socket = INVALID_SOCKET;
}
@end