无法在服务器上打开连接

Question

我遇到与服务器连接的问题。我在下面给出了服务器代码。

- (void)startService
{
struct sockaddr_in addr;
int sockfd;
sockfd = socket( AF_INET, SOCK_STREAM, 0 );
bzero( &addr, sizeof(struct sockaddr_in));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl( INADDR_ANY ); 
addr.sin_port = 0;      
bind( sockfd, (struct sockaddr *)&addr, sizeof(struct sockaddr));
listen(sockfd, 5);
unsigned int namelen = sizeof(struct sockaddr_in);
getsockname( sockfd, (struct sockaddr *)&addr, &namelen );

listeningSocket = [[NSFileHandle alloc] initWithFileDescriptor:sockfd];
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc addObserver:self 
selector:@selector(openNewChatWindowAsMessageReceiver:) 
name:NSFileHandleConnectionAcceptedNotification 
object:listeningSocket];

[listeningSocket acceptConnectionInBackgroundAndNotify];

service = [[NSNetService alloc] initWithDomain:@"local."
                type:@"_rce._tcp."
                name:@""
                port:addr.sin_port];

[service publish];
}

我正在尝试使用以下客户端应用代码连接服务器：

-(void)connectToServer{
NSNetService *remoteService = [discoveredServices objectAtIndex:[sender selectedRow]];

NSData *address = [[remoteService addresses] objectAtIndex:0];

// Create a socket that will be used to connect to the other chat client.
int s = socket(AF_INET, SOCK_STREAM, 0 );

if(connect( s, [address bytes], (int)[address length] )<0){
    NSLog(@"connection Failed");
}else{
    NSLog(@"connected");
}

}

这里的discoverservices是包含nsnetservicebrowser浏览的浏览服务列表的数组，如

- (void)netServiceBrowser:(NSNetServiceBrowser *)aNetServiceBrowser 
    didFindService:(NSNetService *)aNetService 
    moreComing:(BOOL)moreComing
{     
 [discoveredServices addObject:aNetService];

}

在客户端应用程序我收到消息：连接失败.Plz给出建议。