net/dns/mapped_host_resolver_unittest.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "net/dns/mapped_host_resolver.h"
   6
   7 #include "net/base/address_list.h"
   8 #include "net/base/net_errors.h"
   9 #include "net/base/net_log.h"
  10 #include "net/base/net_util.h"
  11 #include "net/base/test_completion_callback.h"
  12 #include "net/dns/mock_host_resolver.h"
  13 #include "testing/gtest/include/gtest/gtest.h"
  14
  15 namespace net {
  16
  17 namespace {
  18
  19 std::string FirstAddress(const AddressList& address_list) {
  20   if (address_list.empty())
  21     return std::string();
  22   return address_list.front().ToString();
  23 }
  24
  25 TEST(MappedHostResolverTest, Inclusion) {
  26   // Create a mock host resolver, with specific hostname to IP mappings.
  27   scoped_ptr<MockHostResolver> resolver_impl(new MockHostResolver());
  28   resolver_impl->rules()->AddSimulatedFailure("*google.com");
  29   resolver_impl->rules()->AddRule("baz.com", "192.168.1.5");
  30   resolver_impl->rules()->AddRule("foo.com", "192.168.1.8");
  31   resolver_impl->rules()->AddRule("proxy", "192.168.1.11");
  32
  33   // Create a remapped resolver that uses |resolver_impl|.
  34   scoped_ptr<MappedHostResolver> resolver(
  35       new MappedHostResolver(resolver_impl.PassAs<HostResolver>()));
  36
  37   int rv;
  38   AddressList address_list;
  39
  40   // Try resolving "www.google.com:80". There are no mappings yet, so this
  41   // hits |resolver_impl| and fails.
  42   TestCompletionCallback callback;
  43   rv = resolver->Resolve(
  44       HostResolver::RequestInfo(HostPortPair("www.google.com", 80)),
  45       DEFAULT_PRIORITY,
  46       &address_list,
  47       callback.callback(),
  48       NULL,
  49       BoundNetLog());
  50   EXPECT_EQ(ERR_IO_PENDING, rv);
  51   rv = callback.WaitForResult();
  52   EXPECT_EQ(ERR_NAME_NOT_RESOLVED, rv);
  53
  54   // Remap *.google.com to baz.com.
  55   EXPECT_TRUE(resolver->AddRuleFromString("map *.google.com baz.com"));
  56
  57   // Try resolving "www.google.com:80". Should be remapped to "baz.com:80".
  58   rv = resolver->Resolve(
  59       HostResolver::RequestInfo(HostPortPair("www.google.com", 80)),
  60       DEFAULT_PRIORITY,
  61       &address_list,
  62       callback.callback(),
  63       NULL,
  64       BoundNetLog());
  65   EXPECT_EQ(ERR_IO_PENDING, rv);
  66   rv = callback.WaitForResult();
  67   EXPECT_EQ(OK, rv);
  68   EXPECT_EQ("192.168.1.5:80", FirstAddress(address_list));
  69
  70   // Try resolving "foo.com:77". This will NOT be remapped, so result
  71   // is "foo.com:77".
  72   rv = resolver->Resolve(HostResolver::RequestInfo(HostPortPair("foo.com", 77)),
  73                          DEFAULT_PRIORITY,
  74                          &address_list,
  75                          callback.callback(),
  76                          NULL,
  77                          BoundNetLog());
  78   EXPECT_EQ(ERR_IO_PENDING, rv);
  79   rv = callback.WaitForResult();
  80   EXPECT_EQ(OK, rv);
  81   EXPECT_EQ("192.168.1.8:77", FirstAddress(address_list));
  82
  83   // Remap "*.org" to "proxy:99".
  84   EXPECT_TRUE(resolver->AddRuleFromString("Map *.org proxy:99"));
  85
  86   // Try resolving "chromium.org:61". Should be remapped to "proxy:99".
  87   rv = resolver->Resolve(
  88       HostResolver::RequestInfo(HostPortPair("chromium.org", 61)),
  89       DEFAULT_PRIORITY,
  90       &address_list,
  91       callback.callback(),
  92       NULL,
  93       BoundNetLog());
  94   EXPECT_EQ(ERR_IO_PENDING, rv);
  95   rv = callback.WaitForResult();
  96   EXPECT_EQ(OK, rv);
  97   EXPECT_EQ("192.168.1.11:99", FirstAddress(address_list));
  98 }
  99
 100 // Tests that exclusions are respected.
 101 TEST(MappedHostResolverTest, Exclusion) {
 102   // Create a mock host resolver, with specific hostname to IP mappings.
 103   scoped_ptr<MockHostResolver> resolver_impl(new MockHostResolver());
 104   resolver_impl->rules()->AddRule("baz", "192.168.1.5");
 105   resolver_impl->rules()->AddRule("www.google.com", "192.168.1.3");
 106
 107   // Create a remapped resolver that uses |resolver_impl|.
 108   scoped_ptr<MappedHostResolver> resolver(
 109       new MappedHostResolver(resolver_impl.PassAs<HostResolver>()));
 110
 111   int rv;
 112   AddressList address_list;
 113   TestCompletionCallback callback;
 114
 115   // Remap "*.com" to "baz".
 116   EXPECT_TRUE(resolver->AddRuleFromString("map *.com baz"));
 117
 118   // Add an exclusion for "*.google.com".
 119   EXPECT_TRUE(resolver->AddRuleFromString("EXCLUDE *.google.com"));
 120
 121   // Try resolving "www.google.com". Should not be remapped due to exclusion).
 122   rv = resolver->Resolve(
 123       HostResolver::RequestInfo(HostPortPair("www.google.com", 80)),
 124       DEFAULT_PRIORITY,
 125       &address_list,
 126       callback.callback(),
 127       NULL,
 128       BoundNetLog());
 129   EXPECT_EQ(ERR_IO_PENDING, rv);
 130   rv = callback.WaitForResult();
 131   EXPECT_EQ(OK, rv);
 132   EXPECT_EQ("192.168.1.3:80", FirstAddress(address_list));
 133
 134   // Try resolving "chrome.com:80". Should be remapped to "baz:80".
 135   rv = resolver->Resolve(
 136       HostResolver::RequestInfo(HostPortPair("chrome.com", 80)),
 137       DEFAULT_PRIORITY,
 138       &address_list,
 139       callback.callback(),
 140       NULL,
 141       BoundNetLog());
 142   EXPECT_EQ(ERR_IO_PENDING, rv);
 143   rv = callback.WaitForResult();
 144   EXPECT_EQ(OK, rv);
 145   EXPECT_EQ("192.168.1.5:80", FirstAddress(address_list));
 146 }
 147
 148 TEST(MappedHostResolverTest, SetRulesFromString) {
 149   // Create a mock host resolver, with specific hostname to IP mappings.
 150   scoped_ptr<MockHostResolver> resolver_impl(new MockHostResolver());
 151   resolver_impl->rules()->AddRule("baz", "192.168.1.7");
 152   resolver_impl->rules()->AddRule("bar", "192.168.1.9");
 153
 154   // Create a remapped resolver that uses |resolver_impl|.
 155   scoped_ptr<MappedHostResolver> resolver(
 156       new MappedHostResolver(resolver_impl.PassAs<HostResolver>()));
 157
 158   int rv;
 159   AddressList address_list;
 160   TestCompletionCallback callback;
 161
 162   // Remap "*.com" to "baz", and *.net to "bar:60".
 163   resolver->SetRulesFromString("map *.com baz , map *.net bar:60");
 164
 165   // Try resolving "www.google.com". Should be remapped to "baz".
 166   rv = resolver->Resolve(
 167       HostResolver::RequestInfo(HostPortPair("www.google.com", 80)),
 168       DEFAULT_PRIORITY,
 169       &address_list,
 170       callback.callback(),
 171       NULL,
 172       BoundNetLog());
 173   EXPECT_EQ(ERR_IO_PENDING, rv);
 174   rv = callback.WaitForResult();
 175   EXPECT_EQ(OK, rv);
 176   EXPECT_EQ("192.168.1.7:80", FirstAddress(address_list));
 177
 178   // Try resolving "chrome.net:80". Should be remapped to "bar:60".
 179   rv = resolver->Resolve(
 180       HostResolver::RequestInfo(HostPortPair("chrome.net", 80)),
 181       DEFAULT_PRIORITY,
 182       &address_list,
 183       callback.callback(),
 184       NULL,
 185       BoundNetLog());
 186   EXPECT_EQ(ERR_IO_PENDING, rv);
 187   rv = callback.WaitForResult();
 188   EXPECT_EQ(OK, rv);
 189   EXPECT_EQ("192.168.1.9:60", FirstAddress(address_list));
 190 }
 191
 192 // Parsing bad rules should silently discard the rule (and never crash).
 193 TEST(MappedHostResolverTest, ParseInvalidRules) {
 194   scoped_ptr<MappedHostResolver> resolver(
 195       new MappedHostResolver(scoped_ptr<HostResolver>()));
 196
 197   EXPECT_FALSE(resolver->AddRuleFromString("xyz"));
 198   EXPECT_FALSE(resolver->AddRuleFromString(std::string()));
 199   EXPECT_FALSE(resolver->AddRuleFromString(" "));
 200   EXPECT_FALSE(resolver->AddRuleFromString("EXCLUDE"));
 201   EXPECT_FALSE(resolver->AddRuleFromString("EXCLUDE foo bar"));
 202   EXPECT_FALSE(resolver->AddRuleFromString("INCLUDE"));
 203   EXPECT_FALSE(resolver->AddRuleFromString("INCLUDE x"));
 204   EXPECT_FALSE(resolver->AddRuleFromString("INCLUDE x :10"));
 205 }
 206
 207 // Test mapping hostnames to resolving failures.
 208 TEST(MappedHostResolverTest, MapToError) {
 209   scoped_ptr<MockHostResolver> resolver_impl(new MockHostResolver());
 210   resolver_impl->rules()->AddRule("*", "192.168.1.5");
 211
 212   scoped_ptr<MappedHostResolver> resolver(
 213       new MappedHostResolver(resolver_impl.PassAs<HostResolver>()));
 214
 215   int rv;
 216   AddressList address_list;
 217
 218   // Remap *.google.com to resolving failures.
 219   EXPECT_TRUE(resolver->AddRuleFromString("MAP *.google.com ~NOTFOUND"));
 220
 221   // Try resolving www.google.com --> Should give an error.
 222   TestCompletionCallback callback1;
 223   rv = resolver->Resolve(
 224       HostResolver::RequestInfo(HostPortPair("www.google.com", 80)),
 225       DEFAULT_PRIORITY,
 226       &address_list,
 227       callback1.callback(),
 228       NULL,
 229       BoundNetLog());
 230   EXPECT_EQ(ERR_NAME_NOT_RESOLVED, rv);
 231
 232   // Try resolving www.foo.com --> Should succeed.
 233   TestCompletionCallback callback2;
 234   rv = resolver->Resolve(
 235       HostResolver::RequestInfo(HostPortPair("www.foo.com", 80)),
 236       DEFAULT_PRIORITY,
 237       &address_list,
 238       callback2.callback(),
 239       NULL,
 240       BoundNetLog());
 241   EXPECT_EQ(ERR_IO_PENDING, rv);
 242   rv = callback2.WaitForResult();
 243   EXPECT_EQ(OK, rv);
 244   EXPECT_EQ("192.168.1.5:80", FirstAddress(address_list));
 245 }
 246
 247 }  // namespace
 248
 249 }  // namespace net