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GCDAsyncUdpSocket.m
executable file
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GCDAsyncUdpSocket.m
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//
// GCDAsyncUdpSocket
//
// This class is in the public domain.
// Originally created by Robbie Hanson of Deusty LLC.
// Updated and maintained by Deusty LLC and the Apple development community.
//
// https://github.com/robbiehanson/CocoaAsyncSocket
//
#import "GCDAsyncUdpSocket.h"
#if ! __has_feature(objc_arc)
#warning This file must be compiled with ARC. Use -fobjc-arc flag (or convert project to ARC).
// For more information see: https://github.com/robbiehanson/CocoaAsyncSocket/wiki/ARC
#endif
/**
* Does ARC support support GCD objects?
* It does if the minimum deployment target is iOS 6+ or Mac OS X 8+
**/
#if TARGET_OS_IPHONE
// Compiling for iOS
#if __IPHONE_OS_VERSION_MIN_REQUIRED >= 60000 // iOS 6.0 or later
#define NEEDS_DISPATCH_RETAIN_RELEASE 0
#else // iOS 5.X or earlier
#define NEEDS_DISPATCH_RETAIN_RELEASE 1
#endif
#else
// Compiling for Mac OS X
#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1080 // Mac OS X 10.8 or later
#define NEEDS_DISPATCH_RETAIN_RELEASE 0
#else
#define NEEDS_DISPATCH_RETAIN_RELEASE 1 // Mac OS X 10.7 or earlier
#endif
#endif
#if TARGET_OS_IPHONE
#import <CFNetwork/CFNetwork.h>
#import <UIKit/UIKit.h>
#endif
#import <arpa/inet.h>
#import <fcntl.h>
#import <ifaddrs.h>
#import <netdb.h>
#import <net/if.h>
#import <sys/socket.h>
#import <sys/types.h>
#if 0
// Logging Enabled - See log level below
// Logging uses the CocoaLumberjack framework (which is also GCD based).
// http://code.google.com/p/cocoalumberjack/
//
// It allows us to do a lot of logging without significantly slowing down the code.
#import "DDLog.h"
#define LogAsync NO
#define LogContext 65535
#define LogObjc(flg, frmt, ...) LOG_OBJC_MAYBE(LogAsync, logLevel, flg, LogContext, frmt, ##__VA_ARGS__)
#define LogC(flg, frmt, ...) LOG_C_MAYBE(LogAsync, logLevel, flg, LogContext, frmt, ##__VA_ARGS__)
#define LogError(frmt, ...) LogObjc(LOG_FLAG_ERROR, (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
#define LogWarn(frmt, ...) LogObjc(LOG_FLAG_WARN, (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
#define LogInfo(frmt, ...) LogObjc(LOG_FLAG_INFO, (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
#define LogVerbose(frmt, ...) LogObjc(LOG_FLAG_VERBOSE, (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
#define LogCError(frmt, ...) LogC(LOG_FLAG_ERROR, (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
#define LogCWarn(frmt, ...) LogC(LOG_FLAG_WARN, (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
#define LogCInfo(frmt, ...) LogC(LOG_FLAG_INFO, (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
#define LogCVerbose(frmt, ...) LogC(LOG_FLAG_VERBOSE, (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
#define LogTrace() LogObjc(LOG_FLAG_VERBOSE, @"%@: %@", THIS_FILE, THIS_METHOD)
#define LogCTrace() LogC(LOG_FLAG_VERBOSE, @"%@: %s", THIS_FILE, __FUNCTION__)
// Log levels : off, error, warn, info, verbose
static const int logLevel = LOG_LEVEL_VERBOSE;
#else
// Logging Disabled
#define LogError(frmt, ...) {}
#define LogWarn(frmt, ...) {}
#define LogInfo(frmt, ...) {}
#define LogVerbose(frmt, ...) {}
#define LogCError(frmt, ...) {}
#define LogCWarn(frmt, ...) {}
#define LogCInfo(frmt, ...) {}
#define LogCVerbose(frmt, ...) {}
#define LogTrace() {}
#define LogCTrace(frmt, ...) {}
#endif
/**
* Seeing a return statements within an inner block
* can sometimes be mistaken for a return point of the enclosing method.
* This makes inline blocks a bit easier to read.
**/
#define return_from_block return
/**
* A socket file descriptor is really just an integer.
* It represents the index of the socket within the kernel.
* This makes invalid file descriptor comparisons easier to read.
**/
#define SOCKET_NULL -1
/**
* Just to type less code.
**/
#define AutoreleasedBlock(block) ^{ @autoreleasepool { block(); }}
@class GCDAsyncUdpSendPacket;
NSString *const GCDAsyncUdpSocketException = @"GCDAsyncUdpSocketException";
NSString *const GCDAsyncUdpSocketErrorDomain = @"GCDAsyncUdpSocketErrorDomain";
NSString *const GCDAsyncUdpSocketQueueName = @"GCDAsyncUdpSocket";
NSString *const GCDAsyncUdpSocketThreadName = @"GCDAsyncUdpSocket-CFStream";
enum GCDAsyncUdpSocketFlags
{
kDidCreateSockets = 1 << 0, // If set, the sockets have been created.
kDidBind = 1 << 1, // If set, bind has been called.
kConnecting = 1 << 2, // If set, a connection attempt is in progress.
kDidConnect = 1 << 3, // If set, socket is connected.
kReceiveOnce = 1 << 4, // If set, one-at-a-time receive is enabled
kReceiveContinuous = 1 << 5, // If set, continuous receive is enabled
kIPv4Deactivated = 1 << 6, // If set, socket4 was closed due to bind or connect on IPv6.
kIPv6Deactivated = 1 << 7, // If set, socket6 was closed due to bind or connect on IPv4.
kSend4SourceSuspended = 1 << 8, // If set, send4Source is suspended.
kSend6SourceSuspended = 1 << 9, // If set, send6Source is suspended.
kReceive4SourceSuspended = 1 << 10, // If set, receive4Source is suspended.
kReceive6SourceSuspended = 1 << 11, // If set, receive6Source is suspended.
kSock4CanAcceptBytes = 1 << 12, // If set, we know socket4 can accept bytes. If unset, it's unknown.
kSock6CanAcceptBytes = 1 << 13, // If set, we know socket6 can accept bytes. If unset, it's unknown.
kForbidSendReceive = 1 << 14, // If set, no new send or receive operations are allowed to be queued.
kCloseAfterSends = 1 << 15, // If set, close as soon as no more sends are queued.
kFlipFlop = 1 << 16, // Used to alternate between IPv4 and IPv6 sockets.
#if TARGET_OS_IPHONE
kAddedStreamListener = 1 << 17, // If set, CFStreams have been added to listener thread
#endif
};
enum GCDAsyncUdpSocketConfig
{
kIPv4Disabled = 1 << 0, // If set, IPv4 is disabled
kIPv6Disabled = 1 << 1, // If set, IPv6 is disabled
kPreferIPv4 = 1 << 2, // If set, IPv4 is preferred over IPv6
kPreferIPv6 = 1 << 3, // If set, IPv6 is preferred over IPv4
};
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark -
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
@interface GCDAsyncUdpSocket ()
{
id delegate;
dispatch_queue_t delegateQueue;
GCDAsyncUdpSocketReceiveFilterBlock receiveFilterBlock;
dispatch_queue_t receiveFilterQueue;
BOOL receiveFilterAsync;
GCDAsyncUdpSocketSendFilterBlock sendFilterBlock;
dispatch_queue_t sendFilterQueue;
BOOL sendFilterAsync;
uint32_t flags;
uint16_t config;
uint16_t max4ReceiveSize;
uint32_t max6ReceiveSize;
int socket4FD;
int socket6FD;
dispatch_queue_t socketQueue;
dispatch_source_t send4Source;
dispatch_source_t send6Source;
dispatch_source_t receive4Source;
dispatch_source_t receive6Source;
dispatch_source_t sendTimer;
GCDAsyncUdpSendPacket *currentSend;
NSMutableArray *sendQueue;
unsigned long socket4FDBytesAvailable;
unsigned long socket6FDBytesAvailable;
uint32_t pendingFilterOperations;
NSData *cachedLocalAddress4;
NSString *cachedLocalHost4;
uint16_t cachedLocalPort4;
NSData *cachedLocalAddress6;
NSString *cachedLocalHost6;
uint16_t cachedLocalPort6;
NSData *cachedConnectedAddress;
NSString *cachedConnectedHost;
uint16_t cachedConnectedPort;
int cachedConnectedFamily;
void *IsOnSocketQueueOrTargetQueueKey;
#if TARGET_OS_IPHONE
CFStreamClientContext streamContext;
CFReadStreamRef readStream4;
CFReadStreamRef readStream6;
CFWriteStreamRef writeStream4;
CFWriteStreamRef writeStream6;
#endif
id userData;
}
- (void)resumeSend4Source;
- (void)resumeSend6Source;
- (void)resumeReceive4Source;
- (void)resumeReceive6Source;
- (void)closeSockets;
- (void)maybeConnect;
- (BOOL)connectWithAddress4:(NSData *)address4 error:(NSError **)errPtr;
- (BOOL)connectWithAddress6:(NSData *)address6 error:(NSError **)errPtr;
- (void)maybeDequeueSend;
- (void)doPreSend;
- (void)doSend;
- (void)endCurrentSend;
- (void)setupSendTimerWithTimeout:(NSTimeInterval)timeout;
- (void)doReceive;
- (void)doReceiveEOF;
- (void)closeWithError:(NSError *)error;
- (BOOL)performMulticastRequest:(int)requestType forGroup:(NSString *)group onInterface:(NSString *)interface error:(NSError **)errPtr;
#if TARGET_OS_IPHONE
- (BOOL)createReadAndWriteStreams:(NSError **)errPtr;
- (BOOL)registerForStreamCallbacks:(NSError **)errPtr;
- (BOOL)addStreamsToRunLoop:(NSError **)errPtr;
- (BOOL)openStreams:(NSError **)errPtr;
- (void)removeStreamsFromRunLoop;
- (void)closeReadAndWriteStreams;
#endif
+ (NSString *)hostFromSockaddr4:(const struct sockaddr_in *)pSockaddr4;
+ (NSString *)hostFromSockaddr6:(const struct sockaddr_in6 *)pSockaddr6;
+ (uint16_t)portFromSockaddr4:(const struct sockaddr_in *)pSockaddr4;
+ (uint16_t)portFromSockaddr6:(const struct sockaddr_in6 *)pSockaddr6;
#if TARGET_OS_IPHONE
// Forward declaration
+ (void)listenerThread;
#endif
@end
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark -
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/**
* The GCDAsyncUdpSendPacket encompasses the instructions for a single send/write.
**/
@interface GCDAsyncUdpSendPacket : NSObject {
@public
NSData *buffer;
NSTimeInterval timeout;
long tag;
BOOL resolveInProgress;
BOOL filterInProgress;
NSArray *resolvedAddresses;
NSError *resolveError;
NSData *address;
int addressFamily;
}
- (id)initWithData:(NSData *)d timeout:(NSTimeInterval)t tag:(long)i;
@end
@implementation GCDAsyncUdpSendPacket
- (id)initWithData:(NSData *)d timeout:(NSTimeInterval)t tag:(long)i
{
if ((self = [super init]))
{
buffer = d;
timeout = t;
tag = i;
resolveInProgress = NO;
}
return self;
}
@end
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark -
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
@interface GCDAsyncUdpSpecialPacket : NSObject {
@public
// uint8_t type;
BOOL resolveInProgress;
NSArray *addresses;
NSError *error;
}
- (id)init;
@end
@implementation GCDAsyncUdpSpecialPacket
- (id)init
{
self = [super init];
return self;
}
@end
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark -
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
@implementation GCDAsyncUdpSocket
- (id)init
{
LogTrace();
return [self initWithDelegate:nil delegateQueue:NULL socketQueue:NULL];
}
- (id)initWithSocketQueue:(dispatch_queue_t)sq
{
LogTrace();
return [self initWithDelegate:nil delegateQueue:NULL socketQueue:sq];
}
- (id)initWithDelegate:(id)aDelegate delegateQueue:(dispatch_queue_t)dq
{
LogTrace();
return [self initWithDelegate:aDelegate delegateQueue:dq socketQueue:NULL];
}
- (id)initWithDelegate:(id)aDelegate delegateQueue:(dispatch_queue_t)dq socketQueue:(dispatch_queue_t)sq
{
LogTrace();
if ((self = [super init]))
{
delegate = aDelegate;
if (dq)
{
delegateQueue = dq;
#if NEEDS_DISPATCH_RETAIN_RELEASE
dispatch_retain(delegateQueue);
#endif
}
max4ReceiveSize = 9216;
max6ReceiveSize = 9216;
socket4FD = SOCKET_NULL;
socket6FD = SOCKET_NULL;
if (sq)
{
NSAssert(sq != dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_LOW, 0),
@"The given socketQueue parameter must not be a concurrent queue.");
NSAssert(sq != dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0),
@"The given socketQueue parameter must not be a concurrent queue.");
NSAssert(sq != dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0),
@"The given socketQueue parameter must not be a concurrent queue.");
socketQueue = sq;
#if NEEDS_DISPATCH_RETAIN_RELEASE
dispatch_retain(socketQueue);
#endif
}
else
{
socketQueue = dispatch_queue_create([GCDAsyncUdpSocketQueueName UTF8String], NULL);
}
// The dispatch_queue_set_specific() and dispatch_get_specific() functions take a "void *key" parameter.
// From the documentation:
//
// > Keys are only compared as pointers and are never dereferenced.
// > Thus, you can use a pointer to a static variable for a specific subsystem or
// > any other value that allows you to identify the value uniquely.
//
// We're just going to use the memory address of an ivar.
// Specifically an ivar that is explicitly named for our purpose to make the code more readable.
//
// However, it feels tedious (and less readable) to include the "&" all the time:
// dispatch_get_specific(&IsOnSocketQueueOrTargetQueueKey)
//
// So we're going to make it so it doesn't matter if we use the '&' or not,
// by assigning the value of the ivar to the address of the ivar.
// Thus: IsOnSocketQueueOrTargetQueueKey == &IsOnSocketQueueOrTargetQueueKey;
IsOnSocketQueueOrTargetQueueKey = &IsOnSocketQueueOrTargetQueueKey;
void *nonNullUnusedPointer = (__bridge void *)self;
dispatch_queue_set_specific(socketQueue, IsOnSocketQueueOrTargetQueueKey, nonNullUnusedPointer, NULL);
currentSend = nil;
sendQueue = [[NSMutableArray alloc] initWithCapacity:5];
#if TARGET_OS_IPHONE
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(applicationWillEnterForeground:)
name:UIApplicationWillEnterForegroundNotification
object:nil];
#endif
}
return self;
}
- (void)dealloc
{
LogInfo(@"%@ - %@ (start)", THIS_METHOD, self);
#if TARGET_OS_IPHONE
[[NSNotificationCenter defaultCenter] removeObserver:self];
#endif
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
{
[self closeWithError:nil];
}
else
{
dispatch_sync(socketQueue, ^{
[self closeWithError:nil];
});
}
delegate = nil;
#if NEEDS_DISPATCH_RETAIN_RELEASE
if (delegateQueue) dispatch_release(delegateQueue);
#endif
delegateQueue = NULL;
#if NEEDS_DISPATCH_RETAIN_RELEASE
if (socketQueue) dispatch_release(socketQueue);
#endif
socketQueue = NULL;
LogInfo(@"%@ - %@ (finish)", THIS_METHOD, self);
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark Configuration
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
- (id)delegate
{
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
{
return delegate;
}
else
{
__block id result = nil;
dispatch_sync(socketQueue, ^{
result = delegate;
});
return result;
}
}
- (void)setDelegate:(id)newDelegate synchronously:(BOOL)synchronously
{
dispatch_block_t block = ^{
delegate = newDelegate;
};
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey)) {
block();
}
else {
if (synchronously)
dispatch_sync(socketQueue, block);
else
dispatch_async(socketQueue, block);
}
}
- (void)setDelegate:(id)newDelegate
{
[self setDelegate:newDelegate synchronously:NO];
}
- (void)synchronouslySetDelegate:(id)newDelegate
{
[self setDelegate:newDelegate synchronously:YES];
}
- (dispatch_queue_t)delegateQueue
{
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
{
return delegateQueue;
}
else
{
__block dispatch_queue_t result = NULL;
dispatch_sync(socketQueue, ^{
result = delegateQueue;
});
return result;
}
}
- (void)setDelegateQueue:(dispatch_queue_t)newDelegateQueue synchronously:(BOOL)synchronously
{
dispatch_block_t block = ^{
#if NEEDS_DISPATCH_RETAIN_RELEASE
if (delegateQueue) dispatch_release(delegateQueue);
if (newDelegateQueue) dispatch_retain(newDelegateQueue);
#endif
delegateQueue = newDelegateQueue;
};
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey)) {
block();
}
else {
if (synchronously)
dispatch_sync(socketQueue, block);
else
dispatch_async(socketQueue, block);
}
}
- (void)setDelegateQueue:(dispatch_queue_t)newDelegateQueue
{
[self setDelegateQueue:newDelegateQueue synchronously:NO];
}
- (void)synchronouslySetDelegateQueue:(dispatch_queue_t)newDelegateQueue
{
[self setDelegateQueue:newDelegateQueue synchronously:YES];
}
- (void)getDelegate:(id *)delegatePtr delegateQueue:(dispatch_queue_t *)delegateQueuePtr
{
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
{
if (delegatePtr) *delegatePtr = delegate;
if (delegateQueuePtr) *delegateQueuePtr = delegateQueue;
}
else
{
__block id dPtr = NULL;
__block dispatch_queue_t dqPtr = NULL;
dispatch_sync(socketQueue, ^{
dPtr = delegate;
dqPtr = delegateQueue;
});
if (delegatePtr) *delegatePtr = dPtr;
if (delegateQueuePtr) *delegateQueuePtr = dqPtr;
}
}
- (void)setDelegate:(id)newDelegate delegateQueue:(dispatch_queue_t)newDelegateQueue synchronously:(BOOL)synchronously
{
dispatch_block_t block = ^{
delegate = newDelegate;
#if NEEDS_DISPATCH_RETAIN_RELEASE
if (delegateQueue) dispatch_release(delegateQueue);
if (newDelegateQueue) dispatch_retain(newDelegateQueue);
#endif
delegateQueue = newDelegateQueue;
};
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey)) {
block();
}
else {
if (synchronously)
dispatch_sync(socketQueue, block);
else
dispatch_async(socketQueue, block);
}
}
- (void)setDelegate:(id)newDelegate delegateQueue:(dispatch_queue_t)newDelegateQueue
{
[self setDelegate:newDelegate delegateQueue:newDelegateQueue synchronously:NO];
}
- (void)synchronouslySetDelegate:(id)newDelegate delegateQueue:(dispatch_queue_t)newDelegateQueue
{
[self setDelegate:newDelegate delegateQueue:newDelegateQueue synchronously:YES];
}
- (BOOL)isIPv4Enabled
{
// Note: YES means kIPv4Disabled is OFF
__block BOOL result = NO;
dispatch_block_t block = ^{
result = ((config & kIPv4Disabled) == 0);
};
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
block();
else
dispatch_sync(socketQueue, block);
return result;
}
- (void)setIPv4Enabled:(BOOL)flag
{
// Note: YES means kIPv4Disabled is OFF
dispatch_block_t block = ^{
LogVerbose(@"%@ %@", THIS_METHOD, (flag ? @"YES" : @"NO"));
if (flag)
config &= ~kIPv4Disabled;
else
config |= kIPv4Disabled;
};
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
block();
else
dispatch_async(socketQueue, block);
}
- (BOOL)isIPv6Enabled
{
// Note: YES means kIPv6Disabled is OFF
__block BOOL result = NO;
dispatch_block_t block = ^{
result = ((config & kIPv6Disabled) == 0);
};
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
block();
else
dispatch_sync(socketQueue, block);
return result;
}
- (void)setIPv6Enabled:(BOOL)flag
{
// Note: YES means kIPv6Disabled is OFF
dispatch_block_t block = ^{
LogVerbose(@"%@ %@", THIS_METHOD, (flag ? @"YES" : @"NO"));
if (flag)
config &= ~kIPv6Disabled;
else
config |= kIPv6Disabled;
};
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
block();
else
dispatch_async(socketQueue, block);
}
- (BOOL)isIPv4Preferred
{
__block BOOL result = NO;
dispatch_block_t block = ^{
result = (config & kPreferIPv4) ? YES : NO;
};
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
block();
else
dispatch_sync(socketQueue, block);
return result;
}
- (BOOL)isIPv6Preferred
{
__block BOOL result = NO;
dispatch_block_t block = ^{
result = (config & kPreferIPv6) ? YES : NO;
};
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
block();
else
dispatch_sync(socketQueue, block);
return result;
}
- (BOOL)isIPVersionNeutral
{
__block BOOL result = NO;
dispatch_block_t block = ^{
result = (config & (kPreferIPv4 | kPreferIPv6)) == 0;
};
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
block();
else
dispatch_sync(socketQueue, block);
return result;
}
- (void)setPreferIPv4
{
dispatch_block_t block = ^{
LogTrace();
config |= kPreferIPv4;
config &= ~kPreferIPv6;
};
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
block();
else
dispatch_async(socketQueue, block);
}
- (void)setPreferIPv6
{
dispatch_block_t block = ^{
LogTrace();
config &= ~kPreferIPv4;
config |= kPreferIPv6;
};
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
block();
else
dispatch_async(socketQueue, block);
}
- (void)setIPVersionNeutral
{
dispatch_block_t block = ^{
LogTrace();
config &= ~kPreferIPv4;
config &= ~kPreferIPv6;
};
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
block();
else
dispatch_async(socketQueue, block);
}
- (uint16_t)maxReceiveIPv4BufferSize
{
__block uint16_t result = 0;
dispatch_block_t block = ^{
result = max4ReceiveSize;
};
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
block();
else
dispatch_sync(socketQueue, block);
return result;
}
- (void)setMaxReceiveIPv4BufferSize:(uint16_t)max
{
dispatch_block_t block = ^{
LogVerbose(@"%@ %u", THIS_METHOD, (unsigned)max);
max4ReceiveSize = max;
};
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
block();
else
dispatch_async(socketQueue, block);
}
- (uint32_t)maxReceiveIPv6BufferSize
{
__block uint32_t result = 0;
dispatch_block_t block = ^{
result = max6ReceiveSize;
};
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
block();
else
dispatch_sync(socketQueue, block);
return result;
}
- (void)setMaxReceiveIPv6BufferSize:(uint32_t)max
{
dispatch_block_t block = ^{
LogVerbose(@"%@ %u", THIS_METHOD, (unsigned)max);
max6ReceiveSize = max;
};
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
block();
else
dispatch_async(socketQueue, block);
}
- (id)userData
{
__block id result = nil;
dispatch_block_t block = ^{
result = userData;
};
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
block();
else
dispatch_sync(socketQueue, block);
return result;
}
- (void)setUserData:(id)arbitraryUserData
{
dispatch_block_t block = ^{
if (userData != arbitraryUserData)
{
userData = arbitraryUserData;
}
};
if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
block();
else
dispatch_async(socketQueue, block);
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark Delegate Helpers
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
- (void)notifyDidConnectToAddress:(NSData *)anAddress
{
LogTrace();
if (delegateQueue && [delegate respondsToSelector:@selector(udpSocket:didConnectToAddress:)])
{
id theDelegate = delegate;
NSData *address = [anAddress copy]; // In case param is NSMutableData
dispatch_async(delegateQueue, ^{ @autoreleasepool {
[theDelegate udpSocket:self didConnectToAddress:address];
}});
}
}
- (void)notifyDidNotConnect:(NSError *)error
{
LogTrace();
if (delegateQueue && [delegate respondsToSelector:@selector(udpSocket:didNotConnect:)])
{
id theDelegate = delegate;
dispatch_async(delegateQueue, ^{ @autoreleasepool {
[theDelegate udpSocket:self didNotConnect:error];
}});
}
}
- (void)notifyDidSendDataWithTag:(long)tag
{
LogTrace();
if (delegateQueue && [delegate respondsToSelector:@selector(udpSocket:didSendDataWithTag:)])
{
id theDelegate = delegate;
dispatch_async(delegateQueue, ^{ @autoreleasepool {
[theDelegate udpSocket:self didSendDataWithTag:tag];
}});
}
}
- (void)notifyDidNotSendDataWithTag:(long)tag dueToError:(NSError *)error
{
LogTrace();
if (delegateQueue && [delegate respondsToSelector:@selector(udpSocket:didNotSendDataWithTag:dueToError:)])
{
id theDelegate = delegate;
dispatch_async(delegateQueue, ^{ @autoreleasepool {
[theDelegate udpSocket:self didNotSendDataWithTag:tag dueToError:error];
}});
}
}
- (void)notifyDidReceiveData:(NSData *)data fromAddress:(NSData *)address withFilterContext:(id)context
{
LogTrace();
SEL selector = @selector(udpSocket:didReceiveData:fromAddress:withFilterContext:);
if (delegateQueue && [delegate respondsToSelector:selector])
{
id theDelegate = delegate;
dispatch_async(delegateQueue, ^{ @autoreleasepool {
[theDelegate udpSocket:self didReceiveData:data fromAddress:address withFilterContext:context];