| // Copyright 2016 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/third_party/quiche/src/http2/tools/http2_frame_builder.h" |
| |
| #ifdef WIN32 |
| #include <winsock2.h> // for htonl() functions |
| #else |
| #include <arpa/inet.h> |
| #include <netinet/in.h> // for htonl, htons |
| #endif |
| |
| #include "testing/gtest/include/gtest/gtest.h" |
| #include "net/third_party/quiche/src/http2/platform/api/http2_string_utils.h" |
| |
| namespace http2 { |
| namespace test { |
| |
| Http2FrameBuilder::Http2FrameBuilder(Http2FrameType type, |
| uint8_t flags, |
| uint32_t stream_id) { |
| AppendUInt24(0); // Frame payload length, unknown so far. |
| Append(type); |
| AppendUInt8(flags); |
| AppendUInt31(stream_id); |
| } |
| |
| Http2FrameBuilder::Http2FrameBuilder(const Http2FrameHeader& v) { |
| Append(v); |
| } |
| |
| void Http2FrameBuilder::Append(quiche::QuicheStringPiece s) { |
| Http2StrAppend(&buffer_, s); |
| } |
| |
| void Http2FrameBuilder::AppendBytes(const void* data, uint32_t num_bytes) { |
| Append(quiche::QuicheStringPiece(static_cast<const char*>(data), num_bytes)); |
| } |
| |
| void Http2FrameBuilder::AppendZeroes(size_t num_zero_bytes) { |
| char zero = 0; |
| buffer_.append(num_zero_bytes, zero); |
| } |
| |
| void Http2FrameBuilder::AppendUInt8(uint8_t value) { |
| AppendBytes(&value, 1); |
| } |
| |
| void Http2FrameBuilder::AppendUInt16(uint16_t value) { |
| value = htons(value); |
| AppendBytes(&value, 2); |
| } |
| |
| void Http2FrameBuilder::AppendUInt24(uint32_t value) { |
| // Doesn't make sense to try to append a larger value, as that doesn't |
| // simulate something an encoder could do (i.e. the other 8 bits simply aren't |
| // there to be occupied). |
| EXPECT_EQ(value, value & 0xffffff); |
| value = htonl(value); |
| AppendBytes(reinterpret_cast<char*>(&value) + 1, 3); |
| } |
| |
| void Http2FrameBuilder::AppendUInt31(uint32_t value) { |
| // If you want to test the high-bit being set, call AppendUInt32 instead. |
| uint32_t tmp = value & StreamIdMask(); |
| EXPECT_EQ(value, value & StreamIdMask()) |
| << "High-bit of uint32_t should be clear."; |
| value = htonl(tmp); |
| AppendBytes(&value, 4); |
| } |
| |
| void Http2FrameBuilder::AppendUInt32(uint32_t value) { |
| value = htonl(value); |
| AppendBytes(&value, sizeof(value)); |
| } |
| |
| void Http2FrameBuilder::Append(Http2ErrorCode error_code) { |
| AppendUInt32(static_cast<uint32_t>(error_code)); |
| } |
| |
| void Http2FrameBuilder::Append(Http2FrameType type) { |
| AppendUInt8(static_cast<uint8_t>(type)); |
| } |
| |
| void Http2FrameBuilder::Append(Http2SettingsParameter parameter) { |
| AppendUInt16(static_cast<uint16_t>(parameter)); |
| } |
| |
| void Http2FrameBuilder::Append(const Http2FrameHeader& v) { |
| AppendUInt24(v.payload_length); |
| Append(v.type); |
| AppendUInt8(v.flags); |
| AppendUInt31(v.stream_id); |
| } |
| |
| void Http2FrameBuilder::Append(const Http2PriorityFields& v) { |
| // The EXCLUSIVE flag is the high-bit of the 32-bit stream dependency field. |
| uint32_t tmp = v.stream_dependency & StreamIdMask(); |
| EXPECT_EQ(tmp, v.stream_dependency); |
| if (v.is_exclusive) { |
| tmp |= 0x80000000; |
| } |
| AppendUInt32(tmp); |
| |
| // The PRIORITY frame's weight field is logically in the range [1, 256], |
| // but is encoded as a byte in the range [0, 255]. |
| ASSERT_LE(1u, v.weight); |
| ASSERT_LE(v.weight, 256u); |
| AppendUInt8(v.weight - 1); |
| } |
| |
| void Http2FrameBuilder::Append(const Http2RstStreamFields& v) { |
| Append(v.error_code); |
| } |
| |
| void Http2FrameBuilder::Append(const Http2SettingFields& v) { |
| Append(v.parameter); |
| AppendUInt32(v.value); |
| } |
| |
| void Http2FrameBuilder::Append(const Http2PushPromiseFields& v) { |
| AppendUInt31(v.promised_stream_id); |
| } |
| |
| void Http2FrameBuilder::Append(const Http2PingFields& v) { |
| AppendBytes(v.opaque_bytes, sizeof Http2PingFields::opaque_bytes); |
| } |
| |
| void Http2FrameBuilder::Append(const Http2GoAwayFields& v) { |
| AppendUInt31(v.last_stream_id); |
| Append(v.error_code); |
| } |
| |
| void Http2FrameBuilder::Append(const Http2WindowUpdateFields& v) { |
| EXPECT_NE(0u, v.window_size_increment) << "Increment must be non-zero."; |
| AppendUInt31(v.window_size_increment); |
| } |
| |
| void Http2FrameBuilder::Append(const Http2AltSvcFields& v) { |
| AppendUInt16(v.origin_length); |
| } |
| |
| // Methods for changing existing buffer contents. |
| |
| void Http2FrameBuilder::WriteAt(quiche::QuicheStringPiece s, size_t offset) { |
| ASSERT_LE(offset, buffer_.size()); |
| size_t len = offset + s.size(); |
| if (len > buffer_.size()) { |
| buffer_.resize(len); |
| } |
| for (size_t ndx = 0; ndx < s.size(); ++ndx) { |
| buffer_[offset + ndx] = s[ndx]; |
| } |
| } |
| |
| void Http2FrameBuilder::WriteBytesAt(const void* data, |
| uint32_t num_bytes, |
| size_t offset) { |
| WriteAt(quiche::QuicheStringPiece(static_cast<const char*>(data), num_bytes), |
| offset); |
| } |
| |
| void Http2FrameBuilder::WriteUInt24At(uint32_t value, size_t offset) { |
| ASSERT_LT(value, static_cast<uint32_t>(1 << 24)); |
| value = htonl(value); |
| WriteBytesAt(reinterpret_cast<char*>(&value) + 1, sizeof(value) - 1, offset); |
| } |
| |
| void Http2FrameBuilder::SetPayloadLength(uint32_t payload_length) { |
| WriteUInt24At(payload_length, 0); |
| } |
| |
| size_t Http2FrameBuilder::SetPayloadLength() { |
| EXPECT_GE(size(), Http2FrameHeader::EncodedSize()); |
| uint32_t payload_length = size() - Http2FrameHeader::EncodedSize(); |
| SetPayloadLength(payload_length); |
| return payload_length; |
| } |
| |
| } // namespace test |
| } // namespace http2 |