private static String getAgentHostIPv4addr()

in bigtop-manager-agent/src/main/java/org/apache/bigtop/manager/agent/monitoring/AgentHostMonitoring.java [176:199]

• 24 lines of code
• 9 McCabe index (conditional complexity)

    private static String getAgentHostIPv4addr(HardwareAbstractionLayer hal, String ipv4DefaultGateway)
            throws UnknownHostException {
        for (NetworkIF networkIF : hal.getNetworkIFs()) {
            String[] iPv4addr = networkIF.getIPv4addr();
            if (null == iPv4addr || iPv4addr.length == 0) {
                continue;
            }
            short subnetMaskLen = networkIF.getSubnetMasks()[0];
            String subnetMask = "255.255.255.0";
            if (subnetMaskLen == 8) {
                subnetMask = "255.0.0.0";
            } else if (subnetMaskLen == 16) {
                subnetMask = "255.255.0.0";
            }
            List<InterfaceAddress> interfaceAddresses =
                    networkIF.queryNetworkInterface().getInterfaceAddresses();
            for (InterfaceAddress ifaddr : interfaceAddresses) {
                if (null != ifaddr.getBroadcast() && sameSubnet(iPv4addr[0], subnetMask, ipv4DefaultGateway)) {
                    return iPv4addr[0];
                }
            }
        }
        return "0.0.0.0";
    }