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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/dns/mapped_host_resolver.h"
#include <utility>
#include "net/base/address_list.h"
#include "net/base/net_errors.h"
#include "net/base/test_completion_callback.h"
#include "net/dns/mock_host_resolver.h"
#include "net/log/net_log.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace net {
namespace {
std::string FirstAddress(const AddressList& address_list) {
if (address_list.empty())
return std::string();
return address_list.front().ToString();
}
TEST(MappedHostResolverTest, Inclusion) {
// Create a mock host resolver, with specific hostname to IP mappings.
scoped_ptr<MockHostResolver> resolver_impl(new MockHostResolver());
resolver_impl->rules()->AddSimulatedFailure("*google.com");
resolver_impl->rules()->AddRule("baz.com", "192.168.1.5");
resolver_impl->rules()->AddRule("foo.com", "192.168.1.8");
resolver_impl->rules()->AddRule("proxy", "192.168.1.11");
// Create a remapped resolver that uses |resolver_impl|.
scoped_ptr<MappedHostResolver> resolver(
new MappedHostResolver(std::move(resolver_impl)));
int rv;
AddressList address_list;
// Try resolving "www.google.com:80". There are no mappings yet, so this
// hits |resolver_impl| and fails.
TestCompletionCallback callback;
rv = resolver->Resolve(
HostResolver::RequestInfo(HostPortPair("www.google.com", 80)),
DEFAULT_PRIORITY,
&address_list,
callback.callback(),
NULL,
BoundNetLog());
EXPECT_EQ(ERR_IO_PENDING, rv);
rv = callback.WaitForResult();
EXPECT_EQ(ERR_NAME_NOT_RESOLVED, rv);
// Remap *.google.com to baz.com.
EXPECT_TRUE(resolver->AddRuleFromString("map *.google.com baz.com"));
// Try resolving "www.google.com:80". Should be remapped to "baz.com:80".
rv = resolver->Resolve(
HostResolver::RequestInfo(HostPortPair("www.google.com", 80)),
DEFAULT_PRIORITY,
&address_list,
callback.callback(),
NULL,
BoundNetLog());
EXPECT_EQ(ERR_IO_PENDING, rv);
rv = callback.WaitForResult();
EXPECT_EQ(OK, rv);
EXPECT_EQ("192.168.1.5:80", FirstAddress(address_list));
// Try resolving "foo.com:77". This will NOT be remapped, so result
// is "foo.com:77".
rv = resolver->Resolve(HostResolver::RequestInfo(HostPortPair("foo.com", 77)),
DEFAULT_PRIORITY,
&address_list,
callback.callback(),
NULL,
BoundNetLog());
EXPECT_EQ(ERR_IO_PENDING, rv);
rv = callback.WaitForResult();
EXPECT_EQ(OK, rv);
EXPECT_EQ("192.168.1.8:77", FirstAddress(address_list));
// Remap "*.org" to "proxy:99".
EXPECT_TRUE(resolver->AddRuleFromString("Map *.org proxy:99"));
// Try resolving "chromium.org:61". Should be remapped to "proxy:99".
rv = resolver->Resolve(
HostResolver::RequestInfo(HostPortPair("chromium.org", 61)),
DEFAULT_PRIORITY,
&address_list,
callback.callback(),
NULL,
BoundNetLog());
EXPECT_EQ(ERR_IO_PENDING, rv);
rv = callback.WaitForResult();
EXPECT_EQ(OK, rv);
EXPECT_EQ("192.168.1.11:99", FirstAddress(address_list));
}
// Tests that exclusions are respected.
TEST(MappedHostResolverTest, Exclusion) {
// Create a mock host resolver, with specific hostname to IP mappings.
scoped_ptr<MockHostResolver> resolver_impl(new MockHostResolver());
resolver_impl->rules()->AddRule("baz", "192.168.1.5");
resolver_impl->rules()->AddRule("www.google.com", "192.168.1.3");
// Create a remapped resolver that uses |resolver_impl|.
scoped_ptr<MappedHostResolver> resolver(
new MappedHostResolver(std::move(resolver_impl)));
int rv;
AddressList address_list;
TestCompletionCallback callback;
// Remap "*.com" to "baz".
EXPECT_TRUE(resolver->AddRuleFromString("map *.com baz"));
// Add an exclusion for "*.google.com".
EXPECT_TRUE(resolver->AddRuleFromString("EXCLUDE *.google.com"));
// Try resolving "www.google.com". Should not be remapped due to exclusion).
rv = resolver->Resolve(
HostResolver::RequestInfo(HostPortPair("www.google.com", 80)),
DEFAULT_PRIORITY,
&address_list,
callback.callback(),
NULL,
BoundNetLog());
EXPECT_EQ(ERR_IO_PENDING, rv);
rv = callback.WaitForResult();
EXPECT_EQ(OK, rv);
EXPECT_EQ("192.168.1.3:80", FirstAddress(address_list));
// Try resolving "chrome.com:80". Should be remapped to "baz:80".
rv = resolver->Resolve(
HostResolver::RequestInfo(HostPortPair("chrome.com", 80)),
DEFAULT_PRIORITY,
&address_list,
callback.callback(),
NULL,
BoundNetLog());
EXPECT_EQ(ERR_IO_PENDING, rv);
rv = callback.WaitForResult();
EXPECT_EQ(OK, rv);
EXPECT_EQ("192.168.1.5:80", FirstAddress(address_list));
}
TEST(MappedHostResolverTest, SetRulesFromString) {
// Create a mock host resolver, with specific hostname to IP mappings.
scoped_ptr<MockHostResolver> resolver_impl(new MockHostResolver());
resolver_impl->rules()->AddRule("baz", "192.168.1.7");
resolver_impl->rules()->AddRule("bar", "192.168.1.9");
// Create a remapped resolver that uses |resolver_impl|.
scoped_ptr<MappedHostResolver> resolver(
new MappedHostResolver(std::move(resolver_impl)));
int rv;
AddressList address_list;
TestCompletionCallback callback;
// Remap "*.com" to "baz", and *.net to "bar:60".
resolver->SetRulesFromString("map *.com baz , map *.net bar:60");
// Try resolving "www.google.com". Should be remapped to "baz".
rv = resolver->Resolve(
HostResolver::RequestInfo(HostPortPair("www.google.com", 80)),
DEFAULT_PRIORITY,
&address_list,
callback.callback(),
NULL,
BoundNetLog());
EXPECT_EQ(ERR_IO_PENDING, rv);
rv = callback.WaitForResult();
EXPECT_EQ(OK, rv);
EXPECT_EQ("192.168.1.7:80", FirstAddress(address_list));
// Try resolving "chrome.net:80". Should be remapped to "bar:60".
rv = resolver->Resolve(
HostResolver::RequestInfo(HostPortPair("chrome.net", 80)),
DEFAULT_PRIORITY,
&address_list,
callback.callback(),
NULL,
BoundNetLog());
EXPECT_EQ(ERR_IO_PENDING, rv);
rv = callback.WaitForResult();
EXPECT_EQ(OK, rv);
EXPECT_EQ("192.168.1.9:60", FirstAddress(address_list));
}
// Parsing bad rules should silently discard the rule (and never crash).
TEST(MappedHostResolverTest, ParseInvalidRules) {
scoped_ptr<MappedHostResolver> resolver(
new MappedHostResolver(scoped_ptr<HostResolver>()));
EXPECT_FALSE(resolver->AddRuleFromString("xyz"));
EXPECT_FALSE(resolver->AddRuleFromString(std::string()));
EXPECT_FALSE(resolver->AddRuleFromString(" "));
EXPECT_FALSE(resolver->AddRuleFromString("EXCLUDE"));
EXPECT_FALSE(resolver->AddRuleFromString("EXCLUDE foo bar"));
EXPECT_FALSE(resolver->AddRuleFromString("INCLUDE"));
EXPECT_FALSE(resolver->AddRuleFromString("INCLUDE x"));
EXPECT_FALSE(resolver->AddRuleFromString("INCLUDE x :10"));
}
// Test mapping hostnames to resolving failures.
TEST(MappedHostResolverTest, MapToError) {
scoped_ptr<MockHostResolver> resolver_impl(new MockHostResolver());
resolver_impl->rules()->AddRule("*", "192.168.1.5");
scoped_ptr<MappedHostResolver> resolver(
new MappedHostResolver(std::move(resolver_impl)));
int rv;
AddressList address_list;
// Remap *.google.com to resolving failures.
EXPECT_TRUE(resolver->AddRuleFromString("MAP *.google.com ~NOTFOUND"));
// Try resolving www.google.com --> Should give an error.
TestCompletionCallback callback1;
rv = resolver->Resolve(
HostResolver::RequestInfo(HostPortPair("www.google.com", 80)),
DEFAULT_PRIORITY,
&address_list,
callback1.callback(),
NULL,
BoundNetLog());
EXPECT_EQ(ERR_NAME_NOT_RESOLVED, rv);
// Try resolving www.foo.com --> Should succeed.
TestCompletionCallback callback2;
rv = resolver->Resolve(
HostResolver::RequestInfo(HostPortPair("www.foo.com", 80)),
DEFAULT_PRIORITY,
&address_list,
callback2.callback(),
NULL,
BoundNetLog());
EXPECT_EQ(ERR_IO_PENDING, rv);
rv = callback2.WaitForResult();
EXPECT_EQ(OK, rv);
EXPECT_EQ("192.168.1.5:80", FirstAddress(address_list));
}
} // namespace
} // namespace net
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