- /** Returns an SHA1 digest of one of the IP addresses. */
- protected byte[] getIpBytes() {
- Enumeration<NetworkInterface> netInterfaces = null;
- try {
- netInterfaces = NetworkInterface.getNetworkInterfaces();
- } catch (SocketException e) {
- throw new IllegalStateException(e);
- }
- if (netInterfaces == null)
- throw new IllegalStateException("No interfaces");
-
- InetAddress selectedIpv6 = null;
- InetAddress selectedIpv4 = null;
- netInterfaces: while (netInterfaces.hasMoreElements()) {
- NetworkInterface netInterface = netInterfaces.nextElement();
- byte[] hardwareAddress = null;
- try {
- hardwareAddress = netInterface.getHardwareAddress();
- if (hardwareAddress != null) {
- // first IPv6
- addr: for (InterfaceAddress addr : netInterface.getInterfaceAddresses()) {
- InetAddress ip = addr.getAddress();
- if (ip instanceof Inet6Address) {
- Inet6Address ipv6 = (Inet6Address) ip;
- if (ipv6.isAnyLocalAddress() || ipv6.isLinkLocalAddress() || ipv6.isLoopbackAddress())
- continue addr;
- selectedIpv6 = ipv6;
- break netInterfaces;
- }
-
- }
- // then IPv4
- addr: for (InterfaceAddress addr : netInterface.getInterfaceAddresses()) {
- InetAddress ip = addr.getAddress();
- if (ip instanceof Inet4Address) {
- Inet4Address ipv4 = (Inet4Address) ip;
- if (ipv4.isAnyLocalAddress() || ipv4.isLinkLocalAddress() || ipv4.isLoopbackAddress())
- continue addr;
- selectedIpv4 = ipv4;
- }
-
- }
- }
- } catch (SocketException e) {
- throw new IllegalStateException(e);
- }
- }
- InetAddress selectedIp = selectedIpv6 != null ? selectedIpv6 : selectedIpv4;
- if (selectedIp == null)
- throw new IllegalStateException("No IP address found");
- byte[] digest = sha1(selectedIp.getAddress());
- logger.log(INFO, "Use IP " + selectedIp + " hashed as " + toHexString(digest) + " as node id");
- byte[] nodeId = toNodeIdBytes(digest, 0);
- // marks that this is not based on MAC address
- forceToNoMacAddress(nodeId, 0);
- return nodeId;
- }