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| 1 // Copyright 2016 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/http2/decoder/payload_decoders/settings_payload_decoder.h" |
| 6 |
| 7 #include <stddef.h> |
| 8 |
| 9 #include <vector> |
| 10 |
| 11 #include "base/bind.h" |
| 12 #include "base/logging.h" |
| 13 #include "net/http2/decoder/frame_parts.h" |
| 14 #include "net/http2/decoder/frame_parts_collector.h" |
| 15 #include "net/http2/decoder/http2_frame_decoder_listener.h" |
| 16 #include "net/http2/decoder/payload_decoders/payload_decoder_base_test_util.h" |
| 17 #include "net/http2/http2_constants.h" |
| 18 #include "net/http2/http2_constants_test_util.h" |
| 19 #include "net/http2/http2_structures_test_util.h" |
| 20 #include "net/http2/tools/http2_frame_builder.h" |
| 21 #include "net/http2/tools/http2_random.h" |
| 22 #include "net/http2/tools/random_decoder_test.h" |
| 23 #include "testing/gtest/include/gtest/gtest.h" |
| 24 |
| 25 namespace net { |
| 26 namespace test { |
| 27 |
| 28 class SettingsPayloadDecoderPeer { |
| 29 public: |
| 30 static constexpr Http2FrameType FrameType() { |
| 31 return Http2FrameType::SETTINGS; |
| 32 } |
| 33 |
| 34 // Returns the mask of flags that affect the decoding of the payload (i.e. |
| 35 // flags that that indicate the presence of certain fields or padding). |
| 36 static constexpr uint8_t FlagsAffectingPayloadDecoding() { |
| 37 return Http2FrameFlag::FLAG_ACK; |
| 38 } |
| 39 |
| 40 static void Randomize(SettingsPayloadDecoder* p, RandomBase* rng) { |
| 41 VLOG(1) << "SettingsPayloadDecoderPeer::Randomize"; |
| 42 test::Randomize(&p->setting_fields_, rng); |
| 43 } |
| 44 }; |
| 45 |
| 46 namespace { |
| 47 |
| 48 struct Listener : public FramePartsCollector { |
| 49 void OnSettingsStart(const Http2FrameHeader& header) override { |
| 50 VLOG(1) << "OnSettingsStart: " << header; |
| 51 EXPECT_EQ(Http2FrameType::SETTINGS, header.type) << header; |
| 52 EXPECT_EQ(Http2FrameFlag(), header.flags) << header; |
| 53 StartFrame(header)->OnSettingsStart(header); |
| 54 } |
| 55 |
| 56 void OnSetting(const Http2SettingFields& setting_fields) override { |
| 57 VLOG(1) << "Http2SettingFields: setting_fields=" << setting_fields; |
| 58 CurrentFrame()->OnSetting(setting_fields); |
| 59 } |
| 60 |
| 61 void OnSettingsEnd() override { |
| 62 VLOG(1) << "OnSettingsEnd"; |
| 63 EndFrame()->OnSettingsEnd(); |
| 64 } |
| 65 |
| 66 void OnSettingsAck(const Http2FrameHeader& header) override { |
| 67 VLOG(1) << "OnSettingsAck: " << header; |
| 68 StartAndEndFrame(header)->OnSettingsAck(header); |
| 69 } |
| 70 |
| 71 void OnFrameSizeError(const Http2FrameHeader& header) override { |
| 72 VLOG(1) << "OnFrameSizeError: " << header; |
| 73 FrameError(header)->OnFrameSizeError(header); |
| 74 } |
| 75 }; |
| 76 |
| 77 class SettingsPayloadDecoderTest |
| 78 : public AbstractPayloadDecoderTest<SettingsPayloadDecoder, |
| 79 SettingsPayloadDecoderPeer, |
| 80 Listener> { |
| 81 public: |
| 82 static bool ApproveSizeForSettingsWrongSize(size_t size) { |
| 83 // Should get an error if size is not an integral multiple of the size |
| 84 // of one setting. |
| 85 return 0 != (size % Http2SettingFields::EncodedSize()); |
| 86 } |
| 87 |
| 88 static bool ApproveSizeForSettingsAkcWrongSize(size_t size) { |
| 89 return size != 0; |
| 90 } |
| 91 |
| 92 protected: |
| 93 Http2SettingFields RandSettingsFields() { |
| 94 Http2SettingFields fields; |
| 95 test::Randomize(&fields, RandomPtr()); |
| 96 return fields; |
| 97 } |
| 98 }; |
| 99 |
| 100 // Confirm we get an error if the SETTINGS payload is not the correct size |
| 101 // to hold exactly zero or more whole Http2SettingFields. |
| 102 TEST_F(SettingsPayloadDecoderTest, SettingsWrongSize) { |
| 103 Http2FrameBuilder fb; |
| 104 fb.Append(RandSettingsFields()); |
| 105 fb.Append(RandSettingsFields()); |
| 106 fb.Append(RandSettingsFields()); |
| 107 EXPECT_TRUE(VerifyDetectsFrameSizeError( |
| 108 0, fb.buffer(), |
| 109 base::Bind( |
| 110 &SettingsPayloadDecoderTest::ApproveSizeForSettingsWrongSize))); |
| 111 } |
| 112 |
| 113 // Confirm we get an error if the SETTINGS ACK payload is not empty. |
| 114 TEST_F(SettingsPayloadDecoderTest, SettingsAkcWrongSize) { |
| 115 Http2FrameBuilder fb; |
| 116 fb.Append(RandSettingsFields()); |
| 117 fb.Append(RandSettingsFields()); |
| 118 fb.Append(RandSettingsFields()); |
| 119 EXPECT_TRUE(VerifyDetectsFrameSizeError( |
| 120 Http2FrameFlag::FLAG_ACK, fb.buffer(), |
| 121 base::Bind( |
| 122 &SettingsPayloadDecoderTest::ApproveSizeForSettingsAkcWrongSize))); |
| 123 } |
| 124 |
| 125 // SETTINGS must have stream_id==0, but the payload decoder doesn't check that. |
| 126 TEST_F(SettingsPayloadDecoderTest, SettingsAck) { |
| 127 for (int stream_id = 0; stream_id < 3; ++stream_id) { |
| 128 Http2FrameHeader header(0, Http2FrameType::SETTINGS, |
| 129 RandFlags() | Http2FrameFlag::FLAG_ACK, stream_id); |
| 130 set_frame_header(header); |
| 131 FrameParts expected(header); |
| 132 EXPECT_TRUE(DecodePayloadAndValidateSeveralWays("", expected)); |
| 133 } |
| 134 } |
| 135 |
| 136 // Try several values of each known SETTINGS parameter. |
| 137 TEST_F(SettingsPayloadDecoderTest, OneRealSetting) { |
| 138 std::vector<uint32_t> values = {0, 1, 0xffffffff, Random().Rand32()}; |
| 139 for (auto param : AllHttp2SettingsParameters()) { |
| 140 for (uint32_t value : values) { |
| 141 Http2SettingFields fields(param, value); |
| 142 Http2FrameBuilder fb; |
| 143 fb.Append(fields); |
| 144 Http2FrameHeader header(fb.size(), Http2FrameType::SETTINGS, RandFlags(), |
| 145 RandStreamId()); |
| 146 set_frame_header(header); |
| 147 FrameParts expected(header); |
| 148 expected.settings.push_back(fields); |
| 149 EXPECT_TRUE(DecodePayloadAndValidateSeveralWays(fb.buffer(), expected)); |
| 150 } |
| 151 } |
| 152 } |
| 153 |
| 154 // Decode a SETTINGS frame with lots of fields. |
| 155 TEST_F(SettingsPayloadDecoderTest, ManySettings) { |
| 156 const uint32_t num_settings = 100; |
| 157 const uint32_t size = Http2SettingFields::EncodedSize() * num_settings; |
| 158 Http2FrameHeader header(size, Http2FrameType::SETTINGS, |
| 159 RandFlags(), // & ~Http2FrameFlag::FLAG_ACK, |
| 160 RandStreamId()); |
| 161 set_frame_header(header); |
| 162 FrameParts expected(header); |
| 163 Http2FrameBuilder fb; |
| 164 for (size_t n = 0; n < num_settings; ++n) { |
| 165 Http2SettingFields fields(static_cast<Http2SettingsParameter>(n), |
| 166 Random().Rand32()); |
| 167 fb.Append(fields); |
| 168 expected.settings.push_back(fields); |
| 169 } |
| 170 ASSERT_EQ(size, fb.size()); |
| 171 EXPECT_TRUE(DecodePayloadAndValidateSeveralWays(fb.buffer(), expected)); |
| 172 } |
| 173 |
| 174 } // namespace |
| 175 } // namespace test |
| 176 } // namespace net |
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