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[136] | 1 | // Arduino DNS client for WizNet5100-based Ethernet shield
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| 2 | // (c) Copyright 2009-2010 MCQN Ltd.
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| 3 | // Released under Apache License, version 2.0
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| 4 |
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| 5 | #ifndef DNSClient_h
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| 6 | #define DNSClient_h
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| 7 |
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| 8 | #include <EthernetUdp2.h>
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| 9 |
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| 10 | class DNSClient
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| 11 | {
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| 12 | public:
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| 13 | // ctor
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| 14 | void begin(const IPAddress& aDNSServer);
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| 15 |
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| 16 | /** Convert a numeric IP address string into a four-byte IP address.
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| 17 | @param aIPAddrString IP address to convert
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| 18 | @param aResult IPAddress structure to store the returned IP address
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| 19 | @result 1 if aIPAddrString was successfully converted to an IP address,
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| 20 | else error code
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| 21 | */
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| 22 | int inet_aton(const char *aIPAddrString, IPAddress& aResult);
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| 23 |
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| 24 | /** Resolve the given hostname to an IP address.
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| 25 | @param aHostname Name to be resolved
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| 26 | @param aResult IPAddress structure to store the returned IP address
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| 27 | @result 1 if aIPAddrString was successfully converted to an IP address,
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| 28 | else error code
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| 29 | */
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| 30 | int getHostByName(const char* aHostname, IPAddress& aResult);
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| 31 |
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| 32 | protected:
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| 33 | uint16_t BuildRequest(const char* aName);
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| 34 | uint16_t ProcessResponse(uint16_t aTimeout, IPAddress& aAddress);
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| 35 |
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| 36 | IPAddress iDNSServer;
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| 37 | uint16_t iRequestId;
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| 38 | EthernetUDP iUdp;
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| 39 | };
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| 40 |
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| 41 | #endif
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