tcpclient.m

使用CFNetwork.framework实现的通信中间件。

/*

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>

#import "TCPClient.h"


@implementation TCPClient

@synthesize _callback;
@synthesize _nstrName;

- (id)init {
    return self;
}

- (void)dealloc {
    [self stop];
	[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 TCPClientConnetCallBack(CFSocketRef socket, CFSocketCallBackType type, CFDataRef address, const void *data, void *info) {
    if (kCFSocketConnectCallBack == type) { 
        // for an AcceptCallBack, the data parameter is a pointer to a CFSocketNativeHandle
    }
}

static void TCPClientDataCallBack(CFSocketRef socket, CFSocketCallBackType type, CFDataRef address, const void *data, void *info) {
	TCPClient* tcpClient = (TCPClient*)info;
    if (kCFSocketDataCallBack == type) { 
        // for an AcceptCallBack, the data parameter is a pointer to a CFSocketNativeHandle
		[tcpClient recvData:socket Addr:address Data:data Info:(void*)info];
    }
}

- (int)startClientWithName:(NSString*)name Addr:(NSString*)pAddr Port:(int)nPort CallBack:(void*)callback{
	// save callback
	self._callback = [[iCallBack alloc] init];
	[self._callback parseCallBack:callback];
	self._nstrName = [NSString stringWithString:name];
    CFSocketContext socketCtxt = {0, self, NULL, NULL, NULL};
    _ipv4socket = CFSocketCreate(kCFAllocatorDefault, PF_INET, SOCK_STREAM, IPPROTO_TCP, kCFSocketDataCallBack, (CFSocketCallBack)&TCPClientDataCallBack, &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 = inet_addr([pAddr UTF8String]);
    NSData *address4 = [NSData dataWithBytes:&addr4 length:sizeof(addr4)];
	if (kCFSocketSuccess != CFSocketConnectToAddress(_ipv4socket, (CFDataRef)address4, 100)){
		if (_ipv4socket) CFRelease(_ipv4socket);
		_ipv4socket = NULL;
		return NO;
	}
	
	// send own name, means register
	iMsgBundle* bundle = [[iMsgBundle alloc] init];
	iMsg* msg = [bundle bundleMsgWithMsgId:REGISTER_SERVER Dest:self._nstrName Body:nil];
	if ([self sendMsgToServer:msg] < 0){
		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);
	
    return YES;
}

- (void)recvData:(CFSocketRef)s Addr:(CFDataRef)address Data:(const void*)data Info:(void*)info{
	NSData* recv = (NSData*)data;
	// parse msg
	iMsgBundle* bundle = [[iMsgBundle alloc] init];
	iMsg* _tagMsg;
	_tagMsg = [bundle unBundleMsgWithRecvData:recv];
	if (!_tagMsg){
		return;
	}
	
	// callback function
	iCommCallBack callback;
	callback = [self._callback findCallBackByMsgId:_tagMsg->_msgId];
	callback(_tagMsg);
	
	[_tagMsg release];
	[bundle release];
}

- (int)sendMsgToServer:(iMsg*)msg{
	int nRet;
	if (!_ipv4socket){
		return kCFSocketError;
	}
	iMsgBundle* bundle = [[iMsgBundle alloc] init];
	msg->_s = _ipv4socket;
	NSData* data = [bundle unBundleMsgHeader:msg];
	nRet = CFSocketSendData(msg->_s, nil, (CFDateRef)data, MSG_TIMEOUT);
	[bundle release];
	[msg release];
	
	return nRet;
}

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


@end