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// Copyright (c) 2011 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/base/dnsrr_resolver.h"
#include "base/bind.h"
#include "base/callback.h"
#include "base/synchronization/lock.h"
#include "net/base/dns_util.h"
#include "net/base/net_errors.h"
#include "net/base/net_log.h"
#include "net/base/test_completion_callback.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace net {
namespace {
void FailTest(int /* result */) {
FAIL();
}
// These tests are disabled because they depend on the external network to
// pass. However, they may be useful when chaging the code.
TEST(DnsRRResolverTest, DISABLED_ResolveReal) {
RRResponse response;
TestCompletionCallback callback;
DnsRRResolver resolver;
DnsRRResolver::Handle handle;
handle = resolver.Resolve("test.imperialviolet.org", 13172, 0,
callback.callback(), &response, 0, BoundNetLog());
ASSERT_TRUE(handle != DnsRRResolver::kInvalidHandle);
ASSERT_EQ(OK, callback.WaitForResult());
ASSERT_EQ(1u, response.rrdatas.size());
LOG(ERROR) << "result length " << response.rrdatas[0].size();
LOG(ERROR) << "result is " << response.rrdatas[0];
}
TEST(DnsRRResolverTest, DISABLED_ResolveReal2) {
RRResponse response;
TestCompletionCallback callback;
DnsRRResolver resolver;
DnsRRResolver::Handle handle;
handle = resolver.Resolve("google.com", kDNS_TXT, 0,
callback.callback(), &response, 0, BoundNetLog());
ASSERT_TRUE(handle != DnsRRResolver::kInvalidHandle);
ASSERT_EQ(OK, callback.WaitForResult());
ASSERT_EQ(1u, response.rrdatas.size());
LOG(ERROR) << "result length " << response.rrdatas[0].size();
LOG(ERROR) << "result is " << response.rrdatas[0];
}
TEST(DnsRRResolverTest, Resolve) {
RRResponse response;
TestCompletionCallback callback;
DnsRRResolver resolver;
DnsRRResolver::Handle handle;
handle = resolver.Resolve("www.testing.notatld", kDNS_TESTING, 0,
callback.callback(), &response, 0, BoundNetLog());
ASSERT_TRUE(handle != DnsRRResolver::kInvalidHandle);
ASSERT_EQ(OK, callback.WaitForResult());
ASSERT_EQ(1u, response.rrdatas.size());
ASSERT_STREQ("goats!", response.rrdatas[0].c_str());
ASSERT_EQ(1u, resolver.requests());
ASSERT_EQ(0u, resolver.cache_hits());
ASSERT_EQ(0u, resolver.inflight_joins());
// Test a cache hit.
handle = resolver.Resolve("www.testing.notatld", kDNS_TESTING, 0,
callback.callback(), &response, 0, BoundNetLog());
ASSERT_TRUE(handle != DnsRRResolver::kInvalidHandle);
ASSERT_EQ(OK, callback.WaitForResult());
ASSERT_EQ(1u, response.rrdatas.size());
ASSERT_STREQ("goats!", response.rrdatas[0].c_str());
ASSERT_EQ(2u, resolver.requests());
ASSERT_EQ(1u, resolver.cache_hits());
ASSERT_EQ(0u, resolver.inflight_joins());
// Test that a callback is never made. This depends on there being another
// test after this one which will pump the MessageLoop.
handle = resolver.Resolve("www.testing.notatld", kDNS_TESTING, 0,
base::Bind(&FailTest), &response, 0, BoundNetLog());
ASSERT_TRUE(handle != DnsRRResolver::kInvalidHandle);
resolver.CancelResolve(handle);
ASSERT_EQ(3u, resolver.requests());
ASSERT_EQ(2u, resolver.cache_hits());
ASSERT_EQ(0u, resolver.inflight_joins());
// Test what happens in the event of a network config change.
handle = resolver.Resolve("nx.testing.notatld", kDNS_TESTING, 0,
callback.callback(), &response, 0, BoundNetLog());
ASSERT_TRUE(handle != DnsRRResolver::kInvalidHandle);
resolver.OnIPAddressChanged();
ASSERT_TRUE(callback.have_result());
ASSERT_EQ(ERR_ABORTED, callback.WaitForResult());
ASSERT_EQ(4u, resolver.requests());
ASSERT_EQ(2u, resolver.cache_hits());
ASSERT_EQ(0u, resolver.inflight_joins());
// Test an inflight join. (Note that this depends on the cache being flushed
// by OnIPAddressChanged.)
TestCompletionCallback callback2;
DnsRRResolver::Handle handle2;
handle = resolver.Resolve("nx.testing.notatld", kDNS_TESTING, 0,
callback.callback(), &response, 0, BoundNetLog());
ASSERT_TRUE(handle != DnsRRResolver::kInvalidHandle);
handle2 = resolver.Resolve("nx.testing.notatld", kDNS_TESTING, 0,
callback2.callback(), &response, 0, BoundNetLog());
ASSERT_TRUE(handle2 != DnsRRResolver::kInvalidHandle);
ASSERT_EQ(ERR_NAME_NOT_RESOLVED, callback.WaitForResult());
ASSERT_EQ(ERR_NAME_NOT_RESOLVED, callback2.WaitForResult());
ASSERT_EQ(6u, resolver.requests());
ASSERT_EQ(2u, resolver.cache_hits());
ASSERT_EQ(1u, resolver.inflight_joins());
}
#if defined(OS_POSIX) && !defined(OS_ANDROID)
// This is a DNS packet resulting from querying a recursive resolver for a TXT
// record for agl._pka.imperialviolet.org. You should be able to get a
// replacement from a packet capture should it ever be needed.
static const uint8 kExamplePacket[] = {
0xce, 0xfe, 0x81, 0x80, 0x00, 0x01, 0x00, 0x02, 0x00, 0x06, 0x00, 0x01, 0x03,
0x61, 0x67, 0x6c, 0x04, 0x5f, 0x70, 0x6b, 0x61, 0x0e, 0x69, 0x6d, 0x70, 0x65,
0x72, 0x69, 0x61, 0x6c, 0x76, 0x69, 0x6f, 0x6c, 0x65, 0x74, 0x03, 0x6f, 0x72,
0x67, 0x00, 0x00, 0x10, 0x00, 0x01, 0xc0, 0x0c, 0x00, 0x10, 0x00, 0x01, 0x00,
0x00, 0x01, 0x2c, 0x00, 0x5e, 0x5d, 0x76, 0x3d, 0x70, 0x6b, 0x61, 0x31, 0x3b,
0x66, 0x70, 0x72, 0x3d, 0x32, 0x41, 0x46, 0x30, 0x30, 0x33, 0x32, 0x42, 0x34,
0x38, 0x45, 0x38, 0x35, 0x36, 0x43, 0x45, 0x30, 0x36, 0x31, 0x35, 0x37, 0x41,
0x31, 0x41, 0x44, 0x34, 0x33, 0x43, 0x36, 0x37, 0x30, 0x44, 0x45, 0x30, 0x34,
0x41, 0x41, 0x41, 0x37, 0x34, 0x3b, 0x75, 0x72, 0x69, 0x3d, 0x68, 0x74, 0x74,
0x70, 0x3a, 0x2f, 0x2f, 0x77, 0x77, 0x77, 0x2e, 0x69, 0x6d, 0x70, 0x65, 0x72,
0x69, 0x61, 0x6c, 0x76, 0x69, 0x6f, 0x6c, 0x65, 0x74, 0x2e, 0x6f, 0x72, 0x67,
0x2f, 0x6b, 0x65, 0x79, 0x2e, 0x61, 0x73, 0x63, 0xc0, 0x0c, 0x00, 0x2e, 0x00,
0x01, 0x00, 0x00, 0x01, 0x2c, 0x00, 0xc6, 0x00, 0x10, 0x05, 0x04, 0x00, 0x01,
0x51, 0x80, 0x4c, 0x74, 0x2f, 0x1a, 0x4c, 0x4c, 0x9c, 0xeb, 0x45, 0xc9, 0x0e,
0x69, 0x6d, 0x70, 0x65, 0x72, 0x69, 0x61, 0x6c, 0x76, 0x69, 0x6f, 0x6c, 0x65,
0x74, 0x03, 0x6f, 0x72, 0x67, 0x00, 0x3b, 0x6d, 0x3d, 0xbb, 0xae, 0x1b, 0x07,
0x8d, 0xa9, 0xb0, 0xa7, 0xa5, 0x7a, 0x84, 0x24, 0x34, 0x29, 0x43, 0x36, 0x3f,
0x5a, 0x48, 0x3b, 0x79, 0xa3, 0x16, 0xa4, 0x28, 0x5b, 0xd7, 0x03, 0xc6, 0x93,
0xba, 0x4e, 0x93, 0x4d, 0x18, 0x5c, 0x98, 0xc2, 0x0d, 0x57, 0xd2, 0x6b, 0x9a,
0x72, 0xbd, 0xe5, 0x8d, 0x10, 0x7b, 0x03, 0xe7, 0x19, 0x1e, 0x51, 0xe5, 0x7e,
0x49, 0x6b, 0xa3, 0xa8, 0xf1, 0xd3, 0x1b, 0xff, 0x40, 0x26, 0x82, 0x65, 0xd0,
0x74, 0x8e, 0xcf, 0xc9, 0x71, 0xea, 0x91, 0x57, 0x7e, 0x50, 0x61, 0x4d, 0x4b,
0x77, 0x05, 0x6a, 0xd8, 0x3f, 0x12, 0x87, 0x50, 0xc2, 0x35, 0x13, 0xab, 0x01,
0x78, 0xd2, 0x3a, 0x55, 0xa2, 0x89, 0xc8, 0x87, 0xe2, 0x7b, 0xec, 0x51, 0x7c,
0xc0, 0x24, 0xb5, 0xa3, 0x33, 0x78, 0x98, 0x28, 0x8e, 0x9b, 0x6b, 0x88, 0x13,
0x25, 0xfa, 0x1d, 0xdc, 0xf1, 0xf0, 0xa6, 0x8d, 0x2a, 0xbb, 0xbc, 0xb0, 0xc7,
0x97, 0x98, 0x8e, 0xef, 0xd9, 0x12, 0x24, 0xee, 0x38, 0x50, 0xdb, 0xd3, 0x59,
0xcc, 0x30, 0x54, 0x4c, 0x38, 0x94, 0x24, 0xbc, 0x75, 0xa5, 0xc0, 0xc4, 0x00,
0x02, 0x00, 0x01, 0x00, 0x00, 0x00, 0x3a, 0x00, 0x15, 0x02, 0x62, 0x30, 0x03,
0x6f, 0x72, 0x67, 0x0b, 0x61, 0x66, 0x69, 0x6c, 0x69, 0x61, 0x73, 0x2d, 0x6e,
0x73, 0x74, 0xc0, 0xc4, 0xc0, 0xc4, 0x00, 0x02, 0x00, 0x01, 0x00, 0x00, 0x00,
0x3a, 0x00, 0x19, 0x02, 0x63, 0x30, 0x03, 0x6f, 0x72, 0x67, 0x0b, 0x61, 0x66,
0x69, 0x6c, 0x69, 0x61, 0x73, 0x2d, 0x6e, 0x73, 0x74, 0x04, 0x69, 0x6e, 0x66,
0x6f, 0x00, 0xc0, 0xc4, 0x00, 0x02, 0x00, 0x01, 0x00, 0x00, 0x00, 0x3a, 0x00,
0x05, 0x02, 0x61, 0x30, 0xc1, 0x99, 0xc0, 0xc4, 0x00, 0x02, 0x00, 0x01, 0x00,
0x00, 0x00, 0x3a, 0x00, 0x05, 0x02, 0x62, 0x32, 0xc1, 0x78, 0xc0, 0xc4, 0x00,
0x02, 0x00, 0x01, 0x00, 0x00, 0x00, 0x3a, 0x00, 0x05, 0x02, 0x64, 0x30, 0xc1,
0x78, 0xc0, 0xc4, 0x00, 0x02, 0x00, 0x01, 0x00, 0x00, 0x00, 0x3a, 0x00, 0x05,
0x02, 0x61, 0x32, 0xc1, 0x99, 0x00, 0x00, 0x29, 0x10, 0x00, 0x00, 0x00, 0x80,
0x00, 0x00, 0x00,
};
TEST(DnsRRResolverTest, ParseExample) {
RRResponse response;
ASSERT_TRUE(response.ParseFromResponse(kExamplePacket,
sizeof(kExamplePacket), kDNS_TXT));
ASSERT_EQ(1u, response.rrdatas.size());
ASSERT_EQ(1u, response.signatures.size());
ASSERT_STREQ("agl._pka.imperialviolet.org", response.name.c_str());
ASSERT_STREQ("]v=pka1;fpr=2AF0032B48E856CE06157A1AD43C670DE04AAA74;"
"uri=http://www.imperialviolet.org/key.asc",
response.rrdatas[0].c_str());
ASSERT_FALSE(response.dnssec);
}
TEST(DnsRRResolverTest, FuzzTruncation) {
RRResponse response;
for (unsigned len = sizeof(kExamplePacket); len <= sizeof(kExamplePacket);
len--) {
response.ParseFromResponse(kExamplePacket, len, kDNS_TXT);
}
}
TEST(DnsRRResolverTest, FuzzCorruption) {
RRResponse response;
uint8 copy[sizeof(kExamplePacket)];
for (unsigned bit_to_corrupt = 0; bit_to_corrupt < sizeof(kExamplePacket) * 8;
bit_to_corrupt++) {
unsigned byte = bit_to_corrupt >> 3;
unsigned bit = bit_to_corrupt & 7;
memcpy(copy, kExamplePacket, sizeof(copy));
copy[byte] ^= (1 << bit);
response.ParseFromResponse(copy, sizeof(copy), kDNS_TXT);
}
}
#endif
} // namespace
} // namespace net
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