pingclient.java

这是ICMP源程序包含PING的接收和发送

public class PingClient {
    public static void main(String[] args) {
	Ping p = new Ping();

	System.out.println("icmp echo (request) to " + args[0]);
	
	for (int i = 0; i < 10; i++) {
	    int r = p.send(args[0]);
	    
	    if (r < 0) {
		System.err.println("Error (" + r + ") sending packet!\n");
		System.exit(1);
	    }
	
	    long q = p.recv(10);

	    System.out.println("icmp echo (reply): ttl: " + q);
	}
    }
}