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 SplayNode<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 }
  47
  48 char const *
  49 ACLEui64::typeString() const
  50 {
  51     return class_;
  52 }
  53
  54 bool
  55 ACLEui64::empty () const
  56 {
  57     return data->empty();
  58 }
  59
  60 Eui::Eui64 *
  61 aclParseEuiData(const char *t)
  62 {
  63     char buf[256];
  64     Eui::Eui64 *q = new Eui::Eui64;
  65     debugs(28, 5, "aclParseEuiData: " << t);
  66
  67     if (sscanf(t, "%[0-9a-fA-F:]", buf) != 1) {
  68         debugs(28, DBG_CRITICAL, "aclParseEuiData: Bad EUI-64 address: '" << t << "'");
  69         safe_free(q);
  70         return NULL;
  71     }
  72
  73     if (!q->decode(buf)) {
  74         debugs(28, DBG_CRITICAL, "" << cfg_filename << " line " << config_lineno << ": " << config_input_line);
  75         debugs(28, DBG_CRITICAL, "aclParseEuiData: Ignoring invalid EUI-64 acl entry: can't parse '" << buf << "'");
  76         safe_free(q);
  77         return NULL;
  78     }
  79
  80     return q;
  81 }
  82
  83 /*******************/
  84 /* aclParseEuiList */
  85 /*******************/
  86 void
  87 ACLEui64::parse()
  88 {
  89     aclParseEuiList(&data);
  90 }
  91
  92 void
  93 aclParseEuiList(Splay<Eui::Eui64 *> **curlist)
  94 {
  95     char *t = NULL;
  96     Eui::Eui64 *q = NULL;
  97
  98     while ((t = strtokFile())) {
  99         if ((q = aclParseEuiData(t)) == NULL)
 100             continue;
 101
 102         (*curlist)->insert(q, aclEui64Compare);
 103     }
 104 }
 105
 106 int
 107 ACLEui64::match(ACLChecklist *cl)
 108 {
 109     ACLFilledChecklist *checklist = Filled(cl);
 110
 111     /* IPv4 does not do EUI-64 (yet) */
 112     if (!checklist->src_addr.isIPv6()) {
 113         debugs(14, 3, "ACLEui64::match: IPv6 Required for EUI-64 Lookups. Skipping " << checklist->src_addr );
 114         return 0;
 115     }
 116
 117     return aclMatchEui(&data, checklist->src_addr);
 118 }
 119
 120 /***************/
 121 /* aclMatchEui */
 122 /***************/
 123 int
 124 aclMatchEui(Splay<Eui::Eui64 *> **dataptr, Ip::Address &c)
 125 {
 126     Eui::Eui64 lookingFor;
 127
 128     if (lookingFor.lookup(c)) {
 129         Eui::Eui64 * const * lookupResult = (*dataptr)->find(&lookingFor, aclEui64Compare);
 130         debugs(28, 3, "aclMatchEui: '" << c << "' " << (lookupResult ? "found" : "NOT found"));
 131         return (lookupResult != NULL);
 132     }
 133
 134     /*
 135      * Address was not found on any interface
 136      */
 137     debugs(28, 3, "aclMatchEui: " << c << " NOT found");
 138     return 0;
 139 }
 140
 141 static int
 142 aclEui64Compare(Eui::Eui64 * const &a, Eui::Eui64 * const &b)
 143 {
 144     return memcmp(a, b, sizeof(Eui::Eui64));
 145 }
 146
 147 struct AclEui64DumpVisitor {
 148     SBufList contents;
 149     void operator() ( const Eui::Eui64 * v) {
 150         static char buf[48];
 151         v->encode(buf, 48);
 152         contents.push_back(SBuf(buf));
 153     }
 154 };
 155
 156 SBufList
 157 ACLEui64::dump() const
 158 {
 159     AclEui64DumpVisitor visitor;
 160     data->visit(visitor);
 161     return visitor.contents;
 162 }
 163
 164 #endif /* USE_SQUID_EUI */
 165