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POBinding/Listening to a port in Mac OSX Lion 10.7.2 fails
 

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  1. POBinding/Listening to a port in Mac OSX Lion 10.7.2 fails
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    <p>I am trying to set up a SilverLight policy server under MacOSX 10.7.2 (Lion). This requires that I create and bind a socket to port 943, since SilverLight requests the policy file on this port. Unfortunately, it seems I am unable to bind at that port, as the bind call fails with <code>errno=49.</code> I suppose I do not have access to this port. Perhaps I need root privileges? Or do I need to forward this port to another one that I can bind? I'm a bit new to network programming, so any help is greatly appreciated! I've also attached my source code. Perhaps I'm doing something wrong, although it works fine if I use the SilverLight restricted ports 4502-4532, which SilverLight communicates on once the policy file is successfully served.</p> <pre><code>- (void) start { CFSocketRef socket = CFSocketCreate(kCFAllocatorDefault, PF_INET, SOCK_STREAM, IPPROTO_TCP, 0, NULL, NULL); if (!socket) { [self errorWithName:@"Unable to create socket."]; return; } int reuse = true; CFSocketNativeHandle fileDescriptor = CFSocketGetNative(socket); if (setsockopt(fileDescriptor, SOL_SOCKET, SO_REUSEADDR, (void *)&amp;reuse, sizeof(int)) != 0) { NSLog(@"Unable to set socket options."); return; } struct sockaddr_in address; memset(&amp;address, 0, sizeof(address)); address.sin_len = sizeof(address); address.sin_family = AF_INET; address.sin_addr.s_addr = htonl(INADDR_LOOPBACK); address.sin_port = htons(943); CFDataRef addressData = CFDataCreate(NULL, (const UInt8 *)&amp;address, sizeof(address)); [(id)addressData autorelease]; CFSocketError error = CFSocketSetAddress(socket, addressData); if (error &lt; 0) { NSLog(@"Error bind %d\n", errno); //fails here for port 943. return; } NSFileHandle *listeningHandle = [[NSFileHandle alloc] initWithFileDescriptor:fileDescriptor closeOnDealloc:YES]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(receiveIncomingConnectionNotification:) name:NSFileHandleConnectionAcceptedNotification object:nil]; [listeningHandle acceptConnectionInBackgroundAndNotify]; } </code></pre>
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    1. USPeter Jacobs
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