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| 1 // Copyright (c) 2011 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/base/address_list.h" | |
| 6 #include "net/base/dns_response.h" | |
| 7 #include "net/base/net_errors.h" | |
| 8 #include "net/base/sys_addrinfo.h" | |
| 9 #include "testing/gtest/include/gtest/gtest.h" | |
| 10 | |
| 11 namespace net { | |
| 12 | |
| 13 // DNS response consists of a header followed by a question followed by | |
| 14 // answer. Header format, question format and response format are | |
| 15 // described below. For the meaning of specific fields, please see RFC | |
| 16 // 1035. | |
| 17 | |
| 18 // Header format. | |
| 19 // 1 1 1 1 1 1 | |
| 20 // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 | |
| 21 // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 22 // | ID | | |
| 23 // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 24 // |QR| Opcode |AA|TC|RD|RA| Z | RCODE | | |
| 25 // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 26 // | QDCOUNT | | |
| 27 // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 28 // | ANCOUNT | | |
| 29 // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 30 // | NSCOUNT | | |
| 31 // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 32 // | ARCOUNT | | |
| 33 // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 34 | |
| 35 // Question format. | |
| 36 // 1 1 1 1 1 1 | |
| 37 // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 | |
| 38 // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 39 // | | | |
| 40 // / QNAME / | |
| 41 // / / | |
| 42 // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 43 // | QTYPE | | |
| 44 // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 45 // | QCLASS | | |
| 46 // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 47 | |
| 48 // Answser format. | |
| 49 // 1 1 1 1 1 1 | |
| 50 // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 | |
| 51 // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 52 // | | | |
| 53 // / / | |
| 54 // / NAME / | |
| 55 // | | | |
| 56 // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 57 // | TYPE | | |
| 58 // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 59 // | CLASS | | |
| 60 // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 61 // | TTL | | |
| 62 // | | | |
| 63 // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 64 // | RDLENGTH | | |
| 65 // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--| | |
| 66 // / RDATA / | |
| 67 // / / | |
| 68 // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 69 | |
| 70 TEST(DnsResponseTest, ResponseWithCnameA) { | |
| 71 const std::string kHostname = "codereview.chromium.org"; | |
| 72 const int kPort = 80; | |
| 73 | |
| 74 DnsQuery q1(kHostname, ADDRESS_FAMILY_IPV4, kPort); | |
| 75 uint8 id_hi = q1.id() >> 8, id_lo = q1.id() & 0xff; | |
| 76 | |
| 77 uint8 ip[] = { // codereview.chromium.org resolves to | |
| 78 0x4a, 0x7d, 0x5f, 0x79 // 74.125.95.121 | |
| 79 }; | |
| 80 | |
| 81 uint8 response_data[] = { | |
| 82 // Header | |
| 83 id_hi, id_lo, // ID | |
| 84 0x81, 0x80, // Standard query response, no error | |
| 85 0x00, 0x01, // 1 question | |
| 86 0x00, 0x02, // 2 RRs (answers) | |
| 87 0x00, 0x00, // 0 authority RRs | |
| 88 0x00, 0x00, // 0 additional RRs | |
| 89 | |
| 90 // Question | |
| 91 0x0a, 0x63, 0x6f, 0x64, // This part is echoed back from the | |
| 92 0x65, 0x72, 0x65, 0x76, // respective query. | |
| 93 0x69, 0x65, 0x77, 0x08, | |
| 94 0x63, 0x68, 0x72, 0x6f, | |
| 95 0x6d, 0x69, 0x75, 0x6d, | |
| 96 0x03, 0x6f, 0x72, 0x67, | |
| 97 0x00, | |
| 98 0x00, 0x01, | |
| 99 0x00, 0x01, | |
| 100 | |
| 101 // Answer 1 | |
| 102 0xc0, 0x0c, // NAME is a pointer to name in Question section. | |
| 103 0x00, 0x05, // TYPE is CNAME. | |
| 104 0x00, 0x01, // CLASS is IN. | |
| 105 0x00, 0x01, // TTL (4 bytes) is 20 hours, 47 minutes, 48 seconds. | |
| 106 0x24, 0x74, | |
| 107 0x00, 0x12, // RDLENGTH is 18 bytse. | |
| 108 0x03, 0x67, 0x68, 0x73, // ghs.l.google.com in DNS format. | |
| 109 0x01, 0x6c, 0x06, 0x67, | |
| 110 0x6f, 0x6f, 0x67, 0x6c, | |
| 111 0x65, 0x03, 0x63, 0x6f, | |
| 112 0x6d, 0x00, | |
| 113 | |
| 114 // Answer 2 | |
| 115 0xc0, 0x35, // NAME is a pointer to name in Question section. | |
| 116 0x00, 0x01, // TYPE is A. | |
| 117 0x00, 0x01, // CLASS is IN. | |
| 118 0x00, 0x00, // TTL (4 bytes) is 53 seconds. | |
| 119 0x00, 0x35, | |
| 120 0x00, 0x04, // RDLENGTH is 4 bytes. | |
| 121 ip[0], ip[1], ip[2], ip[3], // RDATA is the IP. | |
| 122 }; | |
| 123 | |
| 124 // Create a response object and simulate reading into it. | |
| 125 DnsResponse r1(&q1); | |
| 126 memcpy(r1.io_buffer()->data(), &response_data[0], | |
| 127 r1.io_buffer()->size()); | |
| 128 | |
| 129 int response_size = arraysize(response_data); | |
| 130 AddressList address_list; | |
| 131 EXPECT_EQ(OK, r1.Parse(response_size, &address_list)); | |
| 132 | |
| 133 // Verify AddressList content. | |
| 134 size_t sockaddr_size = sizeof(struct sockaddr_in); | |
| 135 const struct addrinfo* ai = address_list.head(); | |
| 136 EXPECT_EQ(kPort, address_list.GetPort()); | |
| 137 | |
| 138 // addrinfo part. | |
| 139 EXPECT_TRUE(ai != NULL); | |
| 140 EXPECT_EQ(AF_INET, ai->ai_family); | |
| 141 EXPECT_EQ(SOCK_STREAM, ai->ai_socktype); | |
| 142 EXPECT_EQ(sockaddr_size, ai->ai_addrlen); | |
| 143 | |
| 144 // sockaddr_in part. | |
| 145 struct sockaddr_in* sa = reinterpret_cast<sockaddr_in*>(ai->ai_addr); | |
| 146 ASSERT_TRUE(sa != NULL); | |
| 147 EXPECT_EQ(AF_INET, sa->sin_family); | |
| 148 EXPECT_EQ(kPort, ntohs(sa->sin_port)); | |
| 149 EXPECT_EQ(0, memcmp(&sa->sin_addr, &ip[0], kIPv4AddressSize)); | |
| 150 } | |
| 151 | |
| 152 } // namespace net | |
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Chromium Code Reviews
Issue 7056050:
Revert 87809 - Added DnsQuery class (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src/