tcpserver.m

来自「使用CFNetwork.framework实现的通信中间件。」· M 代码 · 共 290 行

/*

File: TCPServer.m
Abstract: A TCP server that listens on an arbitrary port.

Version: 1.5

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*/

#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#include <CFNetwork/CFSocketStream.h>

#import "TCPServer.h"


@implementation TCPServer

@synthesize _arrayClient, _callback;

- (id)init {
    return self;
}

- (void)dealloc {
	[self._arrayClient release];
	[self._callback release];
    [super dealloc];
}

// This function is called by CFSocket when a new connection comes in.
// We gather some data here, and convert the function call to a method
// invocation on TCPServer.
static void TCPServerAcceptCallBack(CFSocketRef socket, CFSocketCallBackType type, CFDataRef address, const void *data, void *info) {
    TCPServer *server = (TCPServer *)info;
    if (kCFSocketAcceptCallBack == type) { 
        // for an AcceptCallBack, the data parameter is a pointer to a CFSocketNativeHandle
        CFSocketNativeHandle nativeSocketHandle = *(CFSocketNativeHandle *)data;
		CFSocketContext socketCtxt = {0, server, NULL, NULL, NULL};
		CFSocketRef acceptSocket = CFSocketCreateWithNative(kCFAllocatorDefault, nativeSocketHandle, kCFSocketDataCallBack, (CFSocketCallBack)&DataCallBack, &socketCtxt);
		// set up the run loop sources for the sockets
		CFRunLoopRef cfrl = CFRunLoopGetCurrent();
		CFRunLoopSourceRef source = CFSocketCreateRunLoopSource(kCFAllocatorDefault, acceptSocket, 0);
		CFRunLoopAddSource(cfrl, source, kCFRunLoopCommonModes);
		CFRelease(source);
		
		// save sokcet info
		server->_acceptSocket = acceptSocket;
		server->_handle = nativeSocketHandle;
   }
}

static void DataCallBack ( 
				 CFSocketRef s, 
				 CFSocketCallBackType callbackType, 
				 CFDataRef address, 
				 const void *data, 
				 void *info 
)
{
	TCPServer* server = (TCPServer*)info;
	switch (callbackType) {
		case kCFSocketDataCallBack:
			[server recvData:s Addr:address Data:data Info:(void*)info];
			break;
		default:
			break;
	}
}

- (int)startServerWithPort:(int)nPort CallBack:(void*)callback{
	// save callback
	self._arrayClient = [NSMutableArray array];
	self._callback = [[iCallBack alloc] init];
	[self._callback parseCallBack:callback];
	CFSocketContext socketCtxt = {0, self, NULL, NULL, NULL};
    _ipv4socket = CFSocketCreate(kCFAllocatorDefault, PF_INET, SOCK_STREAM, IPPROTO_TCP, kCFSocketAcceptCallBack, (CFSocketCallBack)&TCPServerAcceptCallBack, &socketCtxt);
	
    if (NULL == _ipv4socket) {
        if (_ipv4socket) CFRelease(_ipv4socket);
        _ipv4socket = NULL;
        return NO;
    }
	
	
    int yes = 1;
    setsockopt(CFSocketGetNative(_ipv4socket), SOL_SOCKET, SO_REUSEADDR, (void *)&yes, sizeof(yes));
	
    // set up the IPv4 endpoint; use port 0, so the kernel will choose an arbitrary port for us, which will be advertised using Bonjour
    struct sockaddr_in addr4;
    memset(&addr4, 0, sizeof(addr4));
    addr4.sin_len = sizeof(addr4);
    addr4.sin_family = AF_INET;
    addr4.sin_port = nPort;
    addr4.sin_addr.s_addr = htonl(INADDR_ANY);
    NSData *address4 = [NSData dataWithBytes:&addr4 length:sizeof(addr4)];
	
    if (kCFSocketSuccess != CFSocketSetAddress(_ipv4socket, (CFDataRef)address4)) {
        if (_ipv4socket) CFRelease(_ipv4socket);
        _ipv4socket = NULL;
        return NO;
    }
	
    // set up the run loop sources for the sockets
    CFRunLoopRef cfrl = CFRunLoopGetCurrent();
    CFRunLoopSourceRef source4 = CFSocketCreateRunLoopSource(kCFAllocatorDefault, _ipv4socket, 0);
    CFRunLoopAddSource(cfrl, source4, kCFRunLoopCommonModes);
    CFRelease(source4);
	// if is command line application, running loop is essential.
#ifdef _Server_CommandLine_App_
	CFRunLoopRun();
#endif
	
    return YES;
}

- (int)stop {
	if (_ipv4socket) {
		CFSocketInvalidate(_ipv4socket);
		CFRelease(_ipv4socket);
		_ipv4socket = NULL;
	}
	
	
    return YES;
}

- (void)recvData:(CFSocketRef)s Addr:(CFDataRef)address Data:(const void*)data Info:(void*)info{
	TCPServer* server = (TCPServer*)info;
	NSData* recv = (NSData*)data;
	// parse msg
	iMsgBundle* bundle = [[iMsgBundle alloc] init];
	iMsg* _tagMsg;
	_tagMsg = [bundle unBundleMsgWithRecvData:recv];
	if (!_tagMsg){
		return;
	}
	// save client's socket
	_tagMsg->_socClient = s;
	
	// if user register to server
	if ([_tagMsg->_msgId compare:REGISTER_SERVER] == NSOrderedSame){
		iClientInfo* tag = [[iClientInfo alloc] init];
		tag->_s = server->_acceptSocket;
		tag->_handle = server->_handle;
		tag._identifier = [NSString stringWithString:_tagMsg->_msgDest];
		[server._arrayClient addObject:(id)tag];
		[tag release];
		return;
	}
	
//	if (!_tagMsg->_msgDest){	// reply, find CFSocket object by current socket
//		CFSocketRef socket = [self findAcceptSocketByClientSoc:s];
//		_tagMsg->_s = socket;
//	}
//	else{	// transfer, find CFSocket object by specific user
//		CFSocketRef socket = [self findAcceptSocketByDestName:_tagMsg->_msgDest];
//		_tagMsg->_s = socket;
//	}
	
	// find callback function
	iCommCallBack callback;
	callback = [self._callback findCallBackByMsgId:_tagMsg->_msgId];
	callback(_tagMsg);
	
	[_tagMsg release];
	[iMsgBundle release];
}

- (CFSocketRef)findAcceptSocketByClientSoc:(CFSocketRef)s{
	int nCount = [self._arrayClient count];
	iClientInfo* tagClient;
	CFSocketNativeHandle handle = CFSocketGetNative(s);
	for (int i = 0; i < nCount; i++){
		tagClient = [self._arrayClient objectAtIndex:i];
		if (handle == tagClient->_handle){
			return tagClient->_s;
		}
	}
	
	return nil;
}

- (CFSocketRef)findAcceptSocketByDestName:(NSString*)destName{
	int nCount = [self._arrayClient count];
	iClientInfo* tagClient;
	for (int i = 0; i < nCount; i++){
		tagClient = [self._arrayClient objectAtIndex:i];
		if ([destName compare:tagClient._identifier] == NSOrderedSame){
			return tagClient->_s;
		}
	}
	
	return nil;
}

- (iClientInfo*)findClientInfoByClientSoc:(CFSocketRef)s{
	int nCount = [self._arrayClient count];
	iClientInfo* tagClient;
	CFSocketNativeHandle handle = CFSocketGetNative(s);
	for (int i = 0; i < nCount; i++){
		tagClient = [self._arrayClient objectAtIndex:i];
		if (handle == tagClient->_handle){
			return tagClient;
		}
	}
	
	return nil;
}

// server response sender.
//- (int)replyMsgToSender:(iMsg*)msg{
//	int nRet;
//	nRet = [self sendMsg:msg];
//	return nRet;
//}
//
//// server transmit or send message to receiver.
//- (int)sendMsgToReceiver:(iMsg*)msg{
//	CFSocketRef socket = [self findAcceptSocketByDestName:msg->_msgDest];
//	msg->_s = socket;
//	int nRet;
//	nRet = [self sendMsg:msg];
//	return nRet;
//}

- (int)sendMsgToClient:(iMsg*)msg{
	CFSocketRef socket;
	if (msg->_msgDest){
		socket = [self findAcceptSocketByDestName:msg->_msgDest];
	}
	else {
		socket = [self findAcceptSocketByClientSoc:msg->_socClient];
	}
	msg->_s = socket;
	// send message
	int nRet;
	nRet = [self sendMsg:msg];
	return nRet;
}

- (int)sendMsg:(iMsg*)msg{
	iMsgBundle* bundle = [[iMsgBundle alloc] init];
	NSData* data = [bundle unBundleMsgHeader:msg];
	int nRet = CFSocketSendData(msg->_s, nil, (CFDateRef)data, MSG_TIMEOUT);
	[bundle release];
	return nRet;
}

@end