src/eui/Eui64.cc

   1 /*
   2  * DEBUG: section 89    EUI-64 Handling
   3  * AUTHOR: Amos Jeffries
   4  *
   5  * Copyright (c) 2009, Amos Jeffries <squid3@treenet.co.nz>
   6  */
   7
   8 #include "squid.h"
   9
  10 #if USE_SQUID_EUI
  11
  12 #include "compat/eui64_aton.h"
  13 #include "Debug.h"
  14 #include "eui/Eui64.h"
  15 #include "globals.h"
  16 #include "ip/Address.h"
  17
  18 bool
  19 Eui::Eui64::decode(const char *asc)
  20 {
  21     if (eui64_aton(asc, (struct eui64 *)eui) != 0) return false;
  22
  23     return true;
  24 }
  25
  26 bool
  27 Eui::Eui64::encode(char *buf, const int len)
  28 {
  29     if (len < SZ_EUI64_BUF) return false;
  30
  31     snprintf(buf, len, "%02x-%02x-%02x-%02x-%02x-%02x-%02x-%02x",
  32              eui[0], eui[1], eui[2], eui[3],
  33              eui[4], eui[5], eui[6], eui[7]);
  34     return true;
  35 }
  36
  37 // return binary representation of the EUI
  38 bool
  39 Eui::Eui64::lookup(const Ip::Address &c)
  40 {
  41     /* try to short-circuit slow OS lookups by using SLAAC data */
  42     if (lookupSlaac(c)) return true;
  43
  44     // find EUI-64 some other way. NDP table lookup?
  45     return lookupNdp(c);
  46 }
  47
  48 bool
  49 Eui::Eui64::lookupSlaac(const Ip::Address &c)
  50 {
  51     /* RFC 4291 Link-Local unicast addresses which contain SLAAC - usually trustable. */
  52     if (c.IsSiteLocal6() && c.IsSlaac() ) {
  53
  54         // strip the final 64 bits of the address...
  55         struct in6_addr tmp;
  56         c.GetInAddr(tmp);
  57         memcpy(eui, &(tmp.s6_addr[8]), SZ_EUI64_BUF);
  58
  59         return true;
  60     }
  61     return false;
  62 }
  63
  64 // return binary representation of the EUI
  65 bool
  66 Eui::Eui64::lookupNdp(const Ip::Address &c)
  67 {
  68 #if 0 /* no actual lookup coded yet */
  69
  70     /* no OS yet supported for NDP protocol lookup */
  71     debugs(28, 0, "ERROR: ARP / MAC / EUI-* operations not supported on this operating system.");
  72
  73     /*
  74      * Address was not found on any interface
  75      */
  76     debugs(28, 3, HERE << c << " NOT found");
  77 #endif /* 0 */
  78
  79     clear();
  80     return false;
  81 }
  82
  83 #endif /* USE_SQUID_EUI */