Eui64.h

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/*
 * Copyright (C) 1996-2023 The Squid Software Foundation and contributors
 *
 * Squid software is distributed under GPLv2+ license and includes
 * contributions from numerous individuals and organizations.
 * Please see the COPYING and CONTRIBUTORS files for details.
 */
 
#ifndef SQUID_SRC_EUI_EUI64_H
#define SQUID_SRC_EUI_EUI64_H
 
#if USE_SQUID_EUI
 
namespace Ip
{
class Address;
}
 
#include <cstring>
#if HAVE_SYS_EUI64_H
#include <sys/eui64.h>
#endif
 
namespace Eui
{
 
/* EUI-64 is 8 bytes. */
#if defined(EUI64_LEN)
#define SZ_EUI64_BUF EUI64_LEN
#else
#define SZ_EUI64_BUF 8
#endif
 
class Eui64
{
 
public:
    Eui64() { clear(); }
 
    bool operator== (const Eui64 &t) const { return (memcmp(eui,t.eui,SZ_EUI64_BUF) == 0); }
    bool operator< (const Eui64 &t) const { return (memcmp(eui,t.eui,SZ_EUI64_BUF) < 0); }
 
    const unsigned char *get(void);
 
    bool set(const char *src, const int len) {
        if (len > SZ_EUI64_BUF) return false;
        if (len < SZ_EUI64_BUF) clear();
        memcpy(eui, src, len);
        return true;
    }
 
    void clear() { memset(eui, 0, SZ_EUI64_BUF); }
 
    bool decode(const char *asc);
 
    bool encode(char *buf, const int len) const;
 
    // lookup an EUI-64 address via IPv6 SLAAC or NDP
    bool lookup(const Ip::Address &c);
 
    // lookup an EUI-64 address via IPv6 NDP
    bool lookupNdp(const Ip::Address &c);
 
    // lookup an EUI-64 address via decoding the IPv6 address SLAAC data
    bool lookupSlaac(const Ip::Address &c);
 
private:
    unsigned char eui[SZ_EUI64_BUF];
};
 
} // namespace Eui
 
#endif /* USE_SQUID_EUI */
#endif /* SQUID_SRC_EUI_EUI64_H */