CenturyLink

String login(String gateway, String username, String password, int timeout = 15000) {
    def url = new URL("http://$gateway/login.cgi")
    def queryString = "loginSubmitValue=1&admin_username=$username&admin_password=$password"
    def conn = url.openConnection()

    conn.setDoOutput(true)
    conn.setConnectTimeout(timeout)
    conn.setRequestMethod("POST")
    conn.outputStream.withWriter { writer ->
        writer << queryString
    }

    conn.connect();

    return conn.getHeaderField("Set-Cookie")
}

String configureDHCP(String gateway, String username, String password,
       boolean enable = true, String startingIp = "192.168.0.2", String endingIp = "192.168.0.254",
       String routerIp = "192.168.0.1", int leaseTime = 86400, String netmask = "255.255.255.0",
       String primaryDns = "192.168.0.1", String secondaryDns = "0.0.0.0", int timeout = 15000) {

    def url = new URL("http://$gateway/advancedsetup_dhcpsettings.cgi")
    def queryString = "dhcpLeasedTime=$leaseTime&isApply=Apply&enblDhcpSrv=${enable ? '1' : '0'}&ethIpAddress=$routerIp&tmpDhcpEthStart=$startingIp&tmpDhcpEthEnd=$endingIp&ethSubnetMask=$netmask&dns_server_1=$primaryDns&dns_server_2$secondaryDns"
    def conn = url.openConnection()

    print queryString
    conn.setDoOutput(true)
    conn.setConnectTimeout(timeout)
    conn.setRequestMethod("POST")
    conn.setRequestProperty("Cookie", login(gateway, username, password))
    conn.outputStream.withWriter { writer ->
        writer << queryString
    }

    conn.connect();

    conn.getHeaderField("Set-Cookie")

    return "DHCP ${enable ? 'enabled' : 'disabled'} with router timeout! New gateway ip: $routerIp"
}