Quadrotor

// Arduino DNS client for WizNet5100-based Ethernet shield

// (c) Copyright 2009-2010 MCQN Ltd.

// Released under Apache License, version 2.0

#ifndef DNSClient_h

#define DNSClient_h

#include <EthernetUdp.h>

class DNSClient

{

public:

    // ctor

    void begin(const IPAddress& aDNSServer);

    /** Convert a numeric IP address string into a four-byte IP address.

        @param aIPAddrString IP address to convert

        @param aResult IPAddress structure to store the returned IP address

        @result 1 if aIPAddrString was successfully converted to an IP address,

                else error code

    */

    int inet_aton(const char *aIPAddrString, IPAddress& aResult);

    /** Resolve the given hostname to an IP address.

        @param aHostname Name to be resolved

        @param aResult IPAddress structure to store the returned IP address

        @result 1 if aIPAddrString was successfully converted to an IP address,

                else error code

    */

    int getHostByName(const char* aHostname, IPAddress& aResult);

protected:

    uint16_t BuildRequest(const char* aName);

    uint16_t ProcessResponse(uint16_t aTimeout, IPAddress& aAddress);

    IPAddress iDNSServer;

    uint16_t iRequestId;

    EthernetUDP iUdp;

};

#endif