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(Objective-C) Bind and Listen on a Randomly Selected Unused PortDemonstrates how to bind and listen on a randomly selected unused port. Note:The ListenPort property used in this example is available starting in Chilkat v9.5.0.59.
#import <CkoSocket.h> // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. CkoSocket *listenSocket = [[CkoSocket alloc] init]; // Pass a value of 0 for the port number to randomly select // an unused port. // (The 2nd argument allows for a backlog of 25 pending connection requests when accepting connections.) BOOL success = [listenSocket BindAndListen: [NSNumber numberWithInt: 5555] backlog: [NSNumber numberWithInt: 25]]; if (success != YES) { NSLog(@"%@",listenSocket.LastErrorText); return; } // Find out what port was chosen. // Note: The ListenPort propety was added in Chilkat v9.5.0.59 int listenPort = [listenSocket.ListenPort intValue]; NSLog(@"%@%d",@"Chosen listen port = ",listenPort); |
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