Example usage for java.nio.channels MulticastChannel join

Introduction

In this page you can find the example usage for java.nio.channels MulticastChannel join.

Prototype

MembershipKey join(InetAddress group, NetworkInterface interf) throws IOException;

Source Link

Document

Joins a multicast group to begin receiving all datagrams sent to the group, returning a membership key.

Usage

From source file:com.offbynull.portmapper.common.NetworkUtils.java

/**
 * Set a {@link MulticastChannel} to listen on all IPv6 interfaces.
 * @param channel multicast channel to listen on
 * @throws IOException if there's an error
 * @throws NullPointerException if any argument is {@code null}
 *//*from   w  w  w.ja v  a 2s .co  m*/
public static void multicastListenOnAllIpv6InterfaceAddresses(MulticastChannel channel) throws IOException {
    Validate.notNull(channel);

    final InetAddress ipv6Group = InetAddress.getByName("ff02::1"); // NOPMD

    Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
    while (interfaces.hasMoreElements()) {
        NetworkInterface networkInterface = interfaces.nextElement();
        Enumeration<InetAddress> addrs = networkInterface.getInetAddresses();
        while (addrs.hasMoreElements()) { // make sure atleast 1 ipv4 addr bound to interface
            InetAddress addr = addrs.nextElement();

            try {
                if (addr instanceof Inet6Address) {
                    channel.join(ipv6Group, networkInterface);
                }
            } catch (IOException ioe) { // NOPMD
                // occurs with certain interfaces, do nothing
            }
        }
    }
}

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From source file:com.offbynull.portmapper.common.NetworkUtils.java

/**
 * Set a {@link MulticastChannel} to listen on all IPv4 interfaces.
 * @param channel multicast channel to listen on
 * @throws IOException if there's an error
 * @throws NullPointerException if any argument is {@code null}
 *//* w ww .j a  va  2 s .  com*/
public static void multicastListenOnAllIpv4InterfaceAddresses(MulticastChannel channel) throws IOException {
    Validate.notNull(channel);

    final InetAddress ipv4Group = InetAddress.getByName("224.0.0.1"); // NOPMD

    Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
    while (interfaces.hasMoreElements()) {
        NetworkInterface networkInterface = interfaces.nextElement();
        Enumeration<InetAddress> addrs = networkInterface.getInetAddresses();
        while (addrs.hasMoreElements()) { // make sure atleast 1 ipv4 addr bound to interface
            InetAddress addr = addrs.nextElement();

            try {
                if (addr instanceof Inet4Address) {
                    channel.join(ipv4Group, networkInterface);
                }
            } catch (IOException ioe) { // NOPMD
                // occurs with certain interfaces
                // do nothing
            }
        }
    }
}

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