src/acl/Eui64.cc

   1 /*
   2  * Copyright (C) 1996-2014 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 /* DEBUG: section 28    Access Control */
  10
  11 #include "squid.h"
  12
  13 #if USE_SQUID_EUI
  14
  15 #include "acl/Eui64.h"
  16 #include "acl/FilledChecklist.h"
  17 #include "cache_cf.h"
  18 #include "Debug.h"
  19 #include "eui/Eui64.h"
  20 #include "globals.h"
  21 #include "ip/Address.h"
  22
  23 static void aclParseEuiList(Splay<Eui::Eui64 *> **curlist);
  24 static int aclMatchEui(Splay<Eui::Eui64 *> **dataptr, Ip::Address &c);
  25 static Splay<Eui::Eui64 *>::SPLAYCMP aclEui64Compare;
  26
  27 ACL *
  28 ACLEui64::clone() const
  29 {
  30     return new ACLEui64(*this);
  31 }
  32
  33 ACLEui64::ACLEui64 (char const *theClass) : data (NULL), class_ (theClass)
  34 {}
  35
  36 ACLEui64::ACLEui64 (ACLEui64 const & old) : data (NULL), class_ (old.class_)
  37 {
  38     /* we don't have copy constructors for the data yet */
  39     assert (!old.data);
  40 }
  41
  42 ACLEui64::~ACLEui64()
  43 {
  44     if (data) {
  45         data->destroy();
  46         delete data;
  47     }
  48 }
  49
  50 char const *
  51 ACLEui64::typeString() const
  52 {
  53     return class_;
  54 }
  55
  56 bool
  57 ACLEui64::empty () const
  58 {
  59     return data->empty();
  60 }
  61
  62 Eui::Eui64 *
  63 aclParseEuiData(const char *t)
  64 {
  65     char buf[256];
  66     Eui::Eui64 *q = new Eui::Eui64;
  67     debugs(28, 5, "aclParseEuiData: " << t);
  68
  69     if (sscanf(t, "%[0-9a-fA-F:]", buf) != 1) {
  70         debugs(28, DBG_CRITICAL, "aclParseEuiData: Bad EUI-64 address: '" << t << "'");
  71         safe_free(q);
  72         return NULL;
  73     }
  74
  75     if (!q->decode(buf)) {
  76         debugs(28, DBG_CRITICAL, "" << cfg_filename << " line " << config_lineno << ": " << config_input_line);
  77         debugs(28, DBG_CRITICAL, "aclParseEuiData: Ignoring invalid EUI-64 acl entry: can't parse '" << buf << "'");
  78         safe_free(q);
  79         return NULL;
  80     }
  81
  82     return q;
  83 }
  84
  85 /*******************/
  86 /* aclParseEuiList */
  87 /*******************/
  88 void
  89 ACLEui64::parse()
  90 {
  91     aclParseEuiList(&data);
  92 }
  93
  94 void
  95 aclParseEuiList(Splay<Eui::Eui64 *> **curlist)
  96 {
  97     char *t = NULL;
  98     Eui::Eui64 *q = NULL;
  99
 100     while ((t = strtokFile())) {
 101         if ((q = aclParseEuiData(t)) == NULL)
 102             continue;
 103
 104         (*curlist)->insert(q, aclEui64Compare);
 105     }
 106 }
 107
 108 int
 109 ACLEui64::match(ACLChecklist *cl)
 110 {
 111     ACLFilledChecklist *checklist = Filled(cl);
 112
 113     /* IPv4 does not do EUI-64 (yet) */
 114     if (!checklist->src_addr.isIPv6()) {
 115         debugs(14, 3, "ACLEui64::match: IPv6 Required for EUI-64 Lookups. Skipping " << checklist->src_addr );
 116         return 0;
 117     }
 118
 119     return aclMatchEui(&data, checklist->src_addr);
 120 }
 121
 122 /***************/
 123 /* aclMatchEui */
 124 /***************/
 125 int
 126 aclMatchEui(Splay<Eui::Eui64 *> **dataptr, Ip::Address &c)
 127 {
 128     Eui::Eui64 lookingFor;
 129
 130     if (lookingFor.lookup(c)) {
 131         Eui::Eui64 * const * lookupResult = (*dataptr)->find(&lookingFor, aclEui64Compare);
 132         debugs(28, 3, "aclMatchEui: '" << c << "' " << (lookupResult ? "found" : "NOT found"));
 133         return (lookupResult != NULL);
 134     }
 135
 136     /*
 137      * Address was not found on any interface
 138      */
 139     debugs(28, 3, "aclMatchEui: " << c << " NOT found");
 140     return 0;
 141 }
 142
 143 static int
 144 aclEui64Compare(Eui::Eui64 * const &a, Eui::Eui64 * const &b)
 145 {
 146     return memcmp(a, b, sizeof(Eui::Eui64));
 147 }
 148
 149 struct AclEui64DumpVisitor {
 150     SBufList contents;
 151     void operator() ( const Eui::Eui64 * v) {
 152         static char buf[48];
 153         v->encode(buf, 48);
 154         contents.push_back(SBuf(buf));
 155     }
 156 };
 157
 158 SBufList
 159 ACLEui64::dump() const
 160 {
 161     AclEui64DumpVisitor visitor;
 162     data->visit(visitor);
 163     return visitor.contents;
 164 }
 165
 166 #endif /* USE_SQUID_EUI */
 167