src/eui/Eui48.h

   1 #ifndef _SQUID_EUI_EUI48_H
   2 #define _SQUID_EUI_EUI48_H
   3
   4 #include "config.h"
   5
   6 #if USE_SQUID_EUI
   7
   8 /* EUI-48 is 6 bytes. */
   9 #define SZ_EUI48_BUF 6
  10
  11 namespace Ip
  12 {
  13 class Address;
  14 };
  15
  16 #if HAVE_CSTRING
  17 #include <cstring>
  18 #endif
  19
  20 /* memcpy and friends */
  21 #if HAVE_STRING_H
  22 #include <string.h>
  23 #endif
  24
  25 namespace Eui
  26 {
  27
  28 class Eui48
  29 {
  30
  31 public:
  32     Eui48() { clear(); };
  33     Eui48(const Eui48 &t) { memcpy(this, &t, sizeof(Eui48)); };
  34     ~Eui48() {};
  35
  36     const unsigned char *get(void);
  37
  38     bool set(const char *src, const int len) {
  39         if (len > SZ_EUI48_BUF) return false;
  40         if (len < SZ_EUI48_BUF) clear();
  41         memcpy(eui, src, len);
  42         return true;
  43     };
  44
  45     void clear() { memset(eui, 0, SZ_EUI48_BUF); };
  46
  47     /**
  48      * Decode an ascii representation of an EUI-48 ethernet address.
  49      *
  50      * \param asc   ASCII representation of an ethernet (MAC) address
  51      * \param eth   Binary representation of the ethernet address
  52      * \retval false        Conversion to binary failed. Invalid address
  53      * \retval true         Conversion completed successfully
  54      */
  55     bool decode(const char *asc);
  56
  57     /**
  58      * Encode an ascii representation (asc) of an EUI-48 ethernet address.
  59      *
  60      * \param buf   Buffer to receive ASCII representation of an ethernet (MAC) address
  61      * \param len   Length of the buffer space available. Must be >= SZ_EUI48_BUF bytes or the encode will fail.
  62      * \param eui   Binary representation of the ethernet address
  63      * \retval false        Conversion to ASCII failed.
  64      * \retval true         Conversion completed successfully.
  65      */
  66     bool encode(char *buf, const int len);
  67
  68     // lookup an EUI-48 / MAC address via ARP
  69     bool lookup(const Ip::Address &c);
  70
  71 private:
  72     unsigned char eui[SZ_EUI48_BUF];
  73 };
  74
  75 }; // namespace Eui
  76
  77 #endif /* USE_SQUID_EUI */
  78 #endif /* _SQUID_EUI_EUI48_H */