/
TiNetworkTCPSocketProxy.m
764 lines (628 loc) Β· 23.4 KB
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TiNetworkTCPSocketProxy.m
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/**
* Appcelerator Titanium Mobile
* Copyright (c) 2009-2010 by Appcelerator, Inc. All Rights Reserved.
* Licensed under the terms of the Apache Public License
* Please see the LICENSE included with this distribution for details.
*/
#ifdef USE_TI_NETWORK
#import "TiNetworkTCPSocketProxy.h"
#import <sys/socket.h>
#import <netinet/in.h>
#import <netdb.h>
#include <CFNetwork/CFSocketStream.h>
extern NSString* const INADDR_ANY_token;
#pragma mark Forward declarations
// Size of the read buffer; ideally should be a multiple of 1024 (1k), up to 4096 (4k, page size)
const NSUInteger bufferSize = 4096;
// TODO: Add host information for better error reporting
typedef struct {
CFReadStreamRef inputStream;
CFWriteStreamRef outputStream;
NSRecursiveLock* writeLock;
NSMutableArray* writeBuffer;
NSUInteger bufferPos;
} SocketStreams;
void handleSocketConnection(CFSocketRef socket, CFSocketCallBackType type,
CFDataRef address, const void* data, void* info);
void handleReadData(CFReadStreamRef input,
CFStreamEventType event,
void* info);
void handleWriteData(CFWriteStreamRef input,
CFStreamEventType event,
void* info);
const CFOptionFlags readStreamEventFlags =
kCFStreamEventHasBytesAvailable | kCFStreamEventErrorOccurred | kCFStreamEventEndEncountered | kCFStreamEventOpenCompleted;
const CFOptionFlags writeStreamEventFlags =
kCFStreamEventCanAcceptBytes | kCFStreamEventErrorOccurred | kCFStreamEventOpenCompleted;
@implementation TiNetworkTCPSocketProxy
#pragma mark Macros
#define VALID (socket!=NULL) && [[self isValid] boolValue]
#pragma mark Private
-(void)closeRemoteSocket:(CFSocketNativeHandle)remoteSocket
{
NSNumber* remoteSocketObject = [NSNumber numberWithInt:remoteSocket];
NSData* socketStreamsObject = [remoteSocketDictionary objectForKey:remoteSocketObject];
SocketStreams* streams = (SocketStreams*)[socketStreamsObject bytes];
if (streams->inputStream) {
if (!(CFReadStreamGetStatus(streams->inputStream) == kCFStreamStatusClosed)) {
CFReadStreamClose(streams->inputStream);
}
CFRelease(streams->inputStream);
}
if (streams->outputStream) {
if (!(CFWriteStreamGetStatus(streams->outputStream) == kCFStreamStatusClosed)) {
CFWriteStreamClose(streams->outputStream);
}
CFRelease(streams->outputStream);
}
[streams->writeBuffer release];
[streams->writeLock release];
[remoteSocketDictionary removeObjectForKey:remoteSocketObject];
}
-(CFDataRef)createAddressData
{
struct sockaddr_in address;
memset(&address, 0, sizeof(address)); // THIS is the finnicky bit: sockaddr_in needs to have 8 bytes of 0 at the end to be compatible with sockaddr
address.sin_len = sizeof(address);
address.sin_port = htons(port);
address.sin_family = AF_INET;
if ([hostName isEqual:INADDR_ANY_token]) {
address.sin_addr.s_addr = htonl(INADDR_ANY);
}
else {
struct hostent *host;
host = gethostbyname([hostName cStringUsingEncoding:[NSString defaultCStringEncoding]]);
if (host == NULL) {
if (socket) {
CFSocketInvalidate(socket);
CFRelease(socket);
socket = NULL;
}
[self throwException:[NSString stringWithFormat:@"Couldn't resolve host %@: %d", hostName, h_errno]
subreason:nil
location:CODELOCATION];
}
memcpy(&address.sin_addr.s_addr, host->h_addr_list[0], host->h_length);
}
return CFDataCreate(kCFAllocatorDefault,
(UInt8*)&address,
sizeof(address));
}
-(void)configureSocketForHandle:(CFSocketNativeHandle)fd
{
if (socket) {
return; // Socket already configured, either by listener or previous action
}
socket = CFSocketCreateWithNative(NULL,
fd,
kCFSocketNoCallBack,
NULL,
NULL);
CFSocketSetSocketFlags(socket, CFSocketGetSocketFlags(socket) & ~kCFSocketCloseOnInvalidate);
}
-(void)handleError:(NSStream*)stream
{
NSError* error = [stream streamError];
NSString* event = ([stream isKindOfClass:[NSInputStream class]]) ? @"readError" : @"writeError";
[stream close];
[configureCondition lock];
[configureCondition signal];
[configureCondition unlock];
[self fireEvent:event
withObject:[NSDictionary dictionaryWithObjectsAndKeys:[error localizedDescription], @"error",
[NSNumber numberWithInt:[error code]], @"code",
nil]];
}
-(CFSocketNativeHandle)getHandleFromStream:(NSStream*)stream
{
CFSocketNativeHandle remoteSocket;
CFDataRef remoteSocketData;
if ([stream isKindOfClass:[NSInputStream class]]) {
remoteSocketData = (CFDataRef)CFReadStreamCopyProperty((CFReadStreamRef)stream, kCFStreamPropertySocketNativeHandle);
}
else {
remoteSocketData = (CFDataRef)CFWriteStreamCopyProperty((CFWriteStreamRef)stream, kCFStreamPropertySocketNativeHandle);
}
if (remoteSocketData == NULL) {
return -1;
}
CFDataGetBytes(remoteSocketData, CFRangeMake(0, CFDataGetLength(remoteSocketData)), (UInt8*)&remoteSocket);
CFRelease(remoteSocketData);
return remoteSocket;
}
-(void)initializeReadStream:(NSInputStream*)input
{
CFSocketNativeHandle remoteSocket = [self getHandleFromStream:input];
if (remoteSocket == -1) {
[self handleError:input];
return;
}
SocketStreams* streams =
(SocketStreams*)[[remoteSocketDictionary objectForKey:[NSNumber numberWithInt:remoteSocket]] bytes];
if (!streams) {
streams = (SocketStreams*)malloc(sizeof(SocketStreams));
streams->outputStream = NULL;
streams->writeBuffer = nil;
streams->writeLock = nil;
[remoteSocketDictionary setObject:[NSData dataWithBytesNoCopy:streams length:sizeof(SocketStreams)]
forKey:[NSNumber numberWithInt:remoteSocket]];
}
streams->inputStream = (CFReadStreamRef)input;
CFReadStreamSetProperty((CFReadStreamRef)input, kCFStreamPropertyShouldCloseNativeSocket, kCFBooleanTrue);
[self configureSocketForHandle:remoteSocket];
if (mode & WRITE_MODE) {
if (streams->outputStream) {
[configureCondition lock];
[configureCondition signal];
[configureCondition unlock];
}
}
else {
[configureCondition lock];
[configureCondition signal];
[configureCondition unlock];
}
}
-(void)initializeWriteStream:(NSOutputStream*)output
{
CFSocketNativeHandle remoteSocket = [self getHandleFromStream:output];
if (remoteSocket == -1) {
[self handleError:output];
return;
}
SocketStreams* streams =
(SocketStreams*)[[remoteSocketDictionary objectForKey:[NSNumber numberWithInt:remoteSocket]] bytes];
if (!streams) {
streams = (SocketStreams*)malloc(sizeof(SocketStreams));
streams->inputStream = NULL;
[remoteSocketDictionary setObject:[NSData dataWithBytesNoCopy:streams length:sizeof(SocketStreams)]
forKey:[NSNumber numberWithInt:remoteSocket]];
}
streams->outputStream = (CFWriteStreamRef)output;
streams->writeBuffer = [[NSMutableArray alloc] init];
streams->writeLock = [[NSRecursiveLock alloc] init];
streams->bufferPos = 0;
CFWriteStreamSetProperty((CFWriteStreamRef)output, kCFStreamPropertyShouldCloseNativeSocket, kCFBooleanTrue);
[self configureSocketForHandle:remoteSocket];
if (mode && READ_MODE) {
if (streams->inputStream) {
[configureCondition lock];
[configureCondition signal];
[configureCondition unlock];
}
}
else {
[configureCondition lock];
[configureCondition signal];
[configureCondition unlock];
}
}
-(void)readFromStream:(NSInputStream*)input
{
CFSocketNativeHandle remoteSocket = [self getHandleFromStream:input];
if (remoteSocket == -1) {
[self handleError:input];
return;
}
// We can't just use -[NSInputStream getBuffer:length:] because the input stream is secretly
// based on sockets, according to the CFReadStream it comes from.
// NOTE: Without sentenels, this could result in some weird behavior (for example, if two images are transmitted back-to-back with no break).
NSMutableData* data = [[[NSMutableData alloc] init] autorelease];
while ([input hasBytesAvailable]) {
uint8_t* buffer = (uint8_t*)malloc(bufferSize * sizeof(uint8_t));
NSInteger bytesRead = -1;
if (buffer != NULL) {
bytesRead = [input read:buffer maxLength:bufferSize];
}
// Not clear whether the failure condition is 0 or -1 from documentation
if (bytesRead == 0 || bytesRead == -1) {
if (buffer != NULL) {
free(buffer);
}
[self handleError:input];
return;
}
[data appendBytes:buffer length:bytesRead];
free(buffer);
}
TiBlob* dataBlob = [[[TiBlob alloc] initWithData:data mimetype:@"application/octet-stream"] autorelease];
[self fireEvent:@"read" withObject:[NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithInt:remoteSocket], @"from",
dataBlob, @"data",
nil]];
}
-(void)writeToStream:(NSOutputStream*)output
{
CFSocketNativeHandle remoteSocket = [self getHandleFromStream:output];
if (remoteSocket == -1) {
[self handleError:output];
return;
}
SocketStreams* streams =
(SocketStreams*)[[remoteSocketDictionary objectForKey:[NSNumber numberWithInt:remoteSocket]] bytes];
[streams->writeLock lock];
if ([streams->writeBuffer count] == 0) {
[streams->writeLock unlock];
return;
}
do {
NSInteger wroteBytes = 0;
NSData* data = [streams->writeBuffer objectAtIndex:0];
const uint8_t* startPos = (const uint8_t*)[data bytes] + streams->bufferPos;
NSUInteger length = [data length] - streams->bufferPos;
wroteBytes = [output write:startPos maxLength:length];
if (wroteBytes == -1) {
[self handleError:output];
[streams->writeLock unlock];
break;
}
if (wroteBytes != length) {
streams->bufferPos += wroteBytes;
}
else {
[streams->writeBuffer removeObjectAtIndex:0];
streams->bufferPos = 0;
}
} while ([output hasSpaceAvailable] &&
streams->bufferPos == 0 &&
[streams->writeBuffer count] > 0);
[streams->writeLock unlock];
}
#pragma mark Public
-(void)_configure
{
[super _configure];
socket = NULL;
remoteSocketDictionary = [[NSMutableDictionary alloc] init];
configureCondition = [[NSCondition alloc] init];
mode = READ_WRITE_MODE;
}
-(void)_destroy
{
if (VALID) {
[self close:nil];
}
RELEASE_TO_NIL(hostName);
RELEASE_TO_NIL(remoteSocketDictionary);
RELEASE_TO_NIL(configureCondition);
[super _destroy];
}
-(NSNumber*)mode
{
return [NSNumber numberWithInt:mode];
}
-(void)setMode:(NSNumber*)mode_
{
switch ([mode_ intValue]) {
case READ_MODE:
case WRITE_MODE:
case READ_WRITE_MODE:
mode = (SocketMode)[mode_ intValue];
break;
default:
[self throwException:TiExceptionRangeError
subreason:@"Invalid socket mode"
location:CODELOCATION];
break;
}
}
-(NSString*)hostName
{
return hostName;
}
-(void)setHostName:(NSString*)hostName_
{
if (hostName == hostName_) {
return;
}
[hostName release];
hostName = [hostName_ retain];
}
-(NSNumber*)port
{
return [NSNumber numberWithInt:port];
}
-(void)setPort:(NSNumber*)port_
{
port = [port_ intValue];
}
-(void)setStripTerminator:(NSNumber *)stripTerminator_
{
stripTerminator = [TiUtils boolValue:stripTerminator_ def:NO];
}
-(NSNumber*)stripTerminator
{
return NUMBOOL(stripTerminator);
}
-(NSNumber*)isValid
{
if (socket!=NULL) {
return [NSNumber numberWithBool:CFSocketIsValid(socket)];
}
return [NSNumber numberWithBool:false];
}
-(void)listen:(id)unused
{
if (VALID) {
[self throwException:@"Socket already opened"
subreason:nil
location:CODELOCATION];
}
if (hostName == nil) {
[self throwException:@"Host is null"
subreason:nil
location:CODELOCATION];
}
CFSocketContext socketContext;
socketContext.version = 0;
socketContext.info = self;
socketContext.retain = NULL;
socketContext.release = NULL;
socketContext.copyDescription = NULL;
// SocketContext is copied
socket = CFSocketCreate(kCFAllocatorDefault,
PF_INET,
SOCK_STREAM,
IPPROTO_TCP,
kCFSocketAcceptCallBack,
handleSocketConnection,
&socketContext);
if (!socket) {
[self throwException:[NSString stringWithFormat:@"Failed to create socket: %d", errno]
subreason:nil
location:CODELOCATION];
}
CFDataRef addressData = (CFDataRef)[self createAddressData];
int reuseOn = 1;
setsockopt(CFSocketGetNative(socket), SOL_SOCKET, SO_REUSEADDR, &reuseOn, sizeof(reuseOn));
setsockopt(CFSocketGetNative(socket), SOL_SOCKET, SO_REUSEPORT, &reuseOn, sizeof(reuseOn));
CFSocketError sockError = CFSocketSetAddress(socket,
addressData);
switch (sockError) {
case kCFSocketError: {
CFSocketInvalidate(socket);
CFRelease(socket);
socket = NULL;
CFRelease(addressData);
[self throwException:[NSString stringWithFormat:@"Failed to listen on %@:%d: %d", hostName, port, errno]
subreason:nil
location:CODELOCATION];
break;
}
}
CFRelease(addressData);
socketRunLoop = CFSocketCreateRunLoopSource(kCFAllocatorDefault,
socket,
1);
CFRunLoopAddSource(CFRunLoopGetMain(),
socketRunLoop,
kCFRunLoopCommonModes);
}
-(void)connect:(id)unused
{
if (VALID) {
[self throwException:@"Socket already opened"
subreason:nil
location:CODELOCATION];
}
if (hostName == nil) {
[self throwException:@"Host is null"
subreason:nil
location:CODELOCATION];
}
CFSocketSignature signature;
signature.protocolFamily = PF_INET;
signature.socketType = SOCK_STREAM;
signature.protocol = IPPROTO_TCP;
signature.address = [self createAddressData]; // Follows create rule; clean up later
CFReadStreamRef inputStream;
CFWriteStreamRef outputStream;
CFStreamCreatePairWithPeerSocketSignature(NULL,
&signature,
(mode & READ_MODE) ? &inputStream : NULL,
(mode & WRITE_MODE) ? &outputStream : NULL);
CFStreamClientContext context;
context.version = 0;
context.info = self;
context.retain = NULL;
context.release = NULL;
context.copyDescription = NULL;
// TODO: Do we catch errors in the stream opening because the stream FD will be NULL in the callback?
if (mode & READ_MODE) {
CFReadStreamSetClient(inputStream, readStreamEventFlags | kCFStreamEventOpenCompleted, handleReadData, &context);
CFReadStreamScheduleWithRunLoop(inputStream, CFRunLoopGetMain(), kCFRunLoopCommonModes);
CFReadStreamOpen(inputStream);
}
if (mode & WRITE_MODE) {
CFWriteStreamSetClient(outputStream, writeStreamEventFlags | kCFStreamEventOpenCompleted, handleWriteData, &context);
CFWriteStreamScheduleWithRunLoop(outputStream, CFRunLoopGetMain(), kCFRunLoopCommonModes);
CFWriteStreamOpen(outputStream);
}
CFRelease(signature.address);
if (!VALID &&
!(inputStream && (CFReadStreamGetStatus(inputStream) == kCFStreamStatusError)) &&
!(outputStream && (CFWriteStreamGetStatus(outputStream) == kCFStreamStatusError))) {
[configureCondition lock];
[configureCondition wait];
[configureCondition unlock];
}
}
-(void)close:(id)unused
{
@synchronized(self)
{
if (!VALID) {
[self throwException:@"Socket is not open"
subreason:nil
location:CODELOCATION];
}
if (socketRunLoop!=NULL)
{
CFRunLoopRemoveSource(CFRunLoopGetMain(),
socketRunLoop,
kCFRunLoopCommonModes);
CFRelease(socketRunLoop);
socketRunLoop=NULL;
}
NSEnumerator* keys = [[remoteSocketDictionary allKeys] objectEnumerator];
id remoteSocketObject;
// Shut down all of the streams and remote connections
while ((remoteSocketObject = [keys nextObject]))
{
CFSocketNativeHandle remoteSocket = [remoteSocketObject intValue];
[self closeRemoteSocket:remoteSocket];
}
if (socket!=NULL)
{
CFSocketInvalidate(socket);
CFRelease(socket);
}
socket = NULL;
}
}
-(void)write:(id)args;
{
if (!(mode & WRITE_MODE)) {
[self throwException:@"Socket does not support writing"
subreason:nil
location:CODELOCATION];
}
else if (!VALID) {
[self throwException:@"Socket is invalid"
subreason:nil
location:CODELOCATION];
}
NSData* data = nil;
id arg = [args objectAtIndex:0];
if ([arg isKindOfClass:[TiBlob class]]) {
data = [arg data];
}
else if ([arg isKindOfClass:[NSString class]]) {
NSUInteger length = (stripTerminator) ? [arg length] : [arg length] + 1;
data = [NSData dataWithBytes:[arg UTF8String] length:length];
}
else {
NSString* errorStr = [NSString stringWithFormat:@"expected: %@ or %@, was: %@", [TiBlob class], [NSString class], [arg class]];
THROW_INVALID_ARG(errorStr)
}
NSNumber* key = nil;
NSEnumerator* keyEnum = [[remoteSocketDictionary allKeys] objectEnumerator];
BOOL broadcast = YES;
if ([args count] > 1) {
ENSURE_CLASS([args objectAtIndex:1], [NSNumber class])
key = [args objectAtIndex:1];
broadcast = NO;
}
else {
key = [keyEnum nextObject];
// Short-circut to avoid degenerate case where there are 0 sockets attached to a listener
if (key == nil) {
return;
}
}
do {
NSData* streamData = [remoteSocketDictionary objectForKey:key];
if (streamData == nil) {
[self throwException:[NSString stringWithFormat:@"Invalid socket descriptor (%@)", key]
subreason:nil
location:CODELOCATION];
}
SocketStreams* streams = (SocketStreams*)[streamData bytes];
if (streams->writeBuffer == nil) {
[configureCondition lock];
[configureCondition wait];
[configureCondition unlock];
}
[streams->writeLock lock];
[streams->writeBuffer addObject:data];
if (CFWriteStreamCanAcceptBytes(streams->outputStream)) {
[self writeToStream:(NSOutputStream*)(streams->outputStream)];
}
[streams->writeLock unlock];
} while (broadcast && (key = [keyEnum nextObject]));
}
@end
#pragma mark CFSocket/CFStream data handling
void handleSocketConnection(CFSocketRef socket, CFSocketCallBackType type,
CFDataRef address, const void* data, void* info) {
switch (type) {
case kCFSocketAcceptCallBack: {
TiNetworkTCPSocketProxy* hostSocket = (TiNetworkTCPSocketProxy*)info;
CFSocketNativeHandle sock = *(CFSocketNativeHandle*)data;
CFReadStreamRef inputStream;
CFWriteStreamRef outputStream;
SocketMode mode = (SocketMode)[[hostSocket mode] intValue];
CFStreamCreatePairWithSocket(kCFAllocatorDefault,
sock,
(mode & READ_MODE) ? &inputStream : NULL,
(mode & WRITE_MODE) ? &outputStream : NULL);
CFStreamClientContext context;
context.version = 0;
context.info = hostSocket;
context.retain = NULL;
context.release = NULL;
context.copyDescription = NULL;
if (mode & READ_MODE) {
CFReadStreamSetClient(inputStream, readStreamEventFlags, handleReadData, &context);
CFReadStreamScheduleWithRunLoop(inputStream, CFRunLoopGetMain(), kCFRunLoopCommonModes);
CFReadStreamOpen(inputStream);
}
if (mode & WRITE_MODE) {
CFWriteStreamSetClient(outputStream, writeStreamEventFlags, handleWriteData, &context);
CFWriteStreamScheduleWithRunLoop(outputStream, CFRunLoopGetMain(), kCFRunLoopCommonModes);
CFWriteStreamOpen(outputStream);
}
break;
}
}
}
void handleReadData(CFReadStreamRef input,
CFStreamEventType event,
void* info)
{
TiNetworkTCPSocketProxy* hostSocket = (TiNetworkTCPSocketProxy*)info;
switch (event) {
case kCFStreamEventOpenCompleted: {
[hostSocket initializeReadStream:(NSInputStream*)input];
break;
}
case kCFStreamEventEndEncountered: {
CFSocketNativeHandle remoteSocket = [hostSocket getHandleFromStream:(NSInputStream*)input];
if (remoteSocket != -1) {
[hostSocket closeRemoteSocket:remoteSocket];
}
break;
}
// There's not very much information you can get out of an error like this, other than
// that it occurred. It's not recoverable without the direct stream information, most likely.
case kCFStreamEventErrorOccurred: {
[hostSocket handleError:(NSInputStream*)input];
break;
}
// This event is NOT necessarily fired until all current available data has been read. Gotta clear that buffer first!
case kCFStreamEventHasBytesAvailable: {
[hostSocket readFromStream:(NSInputStream*)input];
break;
}
}
}
void handleWriteData(CFWriteStreamRef output,
CFStreamEventType event,
void* info)
{
TiNetworkTCPSocketProxy* hostSocket = (TiNetworkTCPSocketProxy*)info;
switch (event) {
case kCFStreamEventOpenCompleted: {
[hostSocket initializeWriteStream:(NSOutputStream*)output];
break;
}
case kCFStreamEventErrorOccurred: {
[hostSocket handleError:(NSOutputStream*)output];
break;
}
case kCFStreamEventCanAcceptBytes: {
[hostSocket writeToStream:(NSOutputStream*)output];
break;
}
}
}
#endif