71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
#ifndef dns_sd_h
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#define dns_sd_h
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#include <stdint.h>
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#include <stdlib.h>
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class dns_sd
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{
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public:
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typedef enum
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{
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kOkRC
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} result_t;
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typedef void (*sendCallback_t)( void* arg, const void* buf, unsigned bufByteN );
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dns_sd( sendCallback_t sendCbFunc, void* sendCbArg, printCallback_t printCbFunc );
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dns_sd( sendCallback_t sendCbFunc, void* sendCbArg, printCallback_t printCbFunc, const char* serviceName, const char* serviceType, const char* serviceDomain, const char* hostName, uint32_t hostAddr, uint16_t hostPort, const char* text );
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virtual ~dns_sd();
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result_t setup( const char* serviceName, const char* serviceType, const char* serviceDomain, const char* hostName, uint32_t hostAddr, uint16_t hostPort, const char* text );
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result_t receive( const void* buf, unsigned bufByteN );
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void gen_question();
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void gen_response();
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private:
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enum
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{
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kHdrBodyByteN = 12,
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kQuestionBodyByteN = 4,
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kRsrcBodyByteN = 10,
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kABodyByteN = 4,
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kSrvBodyByteN = 6,
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kOptBodyByteN = 4,
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};
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sendCallback_t _sendCbFunc;
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void* _sendCbArg;
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printCallback_t _printCbFunc;
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char* _serviceName;
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char* _serviceType;
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char* _serviceDomain;
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char* _hostName;
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uint32_t _hostAddr;
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uint16_t _hostPort;
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char* _text;
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void _free();
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unsigned _calc_question_byte_count();
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void _format_question( unsigned char* buf, unsigned bufByteN );
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unsigned char* _write_uint16( unsigned char* b, unsigned char* bend, uint16_t value );
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unsigned char* _write_uint32( unsigned char* b, unsigned char* bend, uint32_t value );
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unsigned char* _write_ptr( unsigned char* b, unsigned char* bend, const unsigned char ptr[2] );
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unsigned char* _write_text( unsigned char* b, unsigned char* bend, const char* name );
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unsigned char* _write_name( unsigned char* b, unsigned char* bend, const char* name, bool zeroTermFl=false, const unsigned char eosChar='.' );
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unsigned _calc_response_byte_count();
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void _format_response( unsigned char* buf, unsigned bufByteN );
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void _parse( const char* buf, unsigned bufByteN );
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void _send( const void* buf, unsigned bufByteN );
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};
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#endif
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