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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 #ifndef NET_HTTP2_TOOLS_HTTP2_FRAME_BUILDER_H_ |
| 6 #define NET_HTTP2_TOOLS_HTTP2_FRAME_BUILDER_H_ |
| 7 |
| 8 // Http2FrameBuilder builds wire-format HTTP/2 frames (or fragments thereof) |
| 9 // from components. |
| 10 // |
| 11 // For now, this is only intended for use in tests, and thus has EXPECT* in the |
| 12 // code. If desired to use it in an encoder, it will need optimization work, |
| 13 // especially w.r.t memory mgmt, and the EXPECT* will need to be removed or |
| 14 // replaced with DCHECKs. |
| 15 |
| 16 #include <stddef.h> // for size_t |
| 17 |
| 18 #include <string> |
| 19 |
| 20 #include "base/strings/string_piece.h" |
| 21 #include "net/http2/http2_constants.h" |
| 22 #include "net/http2/http2_structures.h" |
| 23 |
| 24 namespace net { |
| 25 namespace test { |
| 26 |
| 27 class Http2FrameBuilder { |
| 28 public: |
| 29 Http2FrameBuilder(Http2FrameType type, uint8_t flags, uint32_t stream_id); |
| 30 explicit Http2FrameBuilder(const Http2FrameHeader& v); |
| 31 Http2FrameBuilder() {} |
| 32 ~Http2FrameBuilder() {} |
| 33 |
| 34 size_t size() const { return buffer_.size(); } |
| 35 const std::string& buffer() const { return buffer_; } |
| 36 |
| 37 //---------------------------------------------------------------------------- |
| 38 // Methods for appending to the end of the buffer. |
| 39 |
| 40 // Append a sequence of bytes from various sources. |
| 41 void Append(base::StringPiece s); |
| 42 void AppendBytes(const void* data, uint32_t num_bytes); |
| 43 |
| 44 // Append an array of type T[N] to the string. Intended for tests with arrays |
| 45 // initialized from literals, such as: |
| 46 // const char kData[] = {0x12, 0x23, ...}; |
| 47 // builder.AppendBytes(kData); |
| 48 template <typename T, size_t N> |
| 49 void AppendBytes(T (&buf)[N]) { |
| 50 AppendBytes(buf, N * sizeof(buf[0])); |
| 51 } |
| 52 |
| 53 // Support for appending padding. Does not read or write the Pad Length field. |
| 54 void AppendZeroes(size_t num_zero_bytes); |
| 55 |
| 56 // Append various sizes of unsigned integers. |
| 57 void AppendUInt8(uint8_t value); |
| 58 void AppendUInt16(uint16_t value); |
| 59 void AppendUInt24(uint32_t value); |
| 60 void AppendUInt31(uint32_t value); |
| 61 void AppendUInt32(uint32_t value); |
| 62 |
| 63 // Append various enums. |
| 64 void Append(Http2ErrorCode error_code); |
| 65 void Append(Http2FrameType type); |
| 66 void Append(Http2SettingsParameter parameter); |
| 67 |
| 68 // Append various structures. |
| 69 void Append(const Http2FrameHeader& v); |
| 70 void Append(const Http2PriorityFields& v); |
| 71 void Append(const Http2RstStreamFields& v); |
| 72 void Append(const Http2SettingFields& v); |
| 73 void Append(const Http2PushPromiseFields& v); |
| 74 void Append(const Http2PingFields& v); |
| 75 void Append(const Http2GoAwayFields& v); |
| 76 void Append(const Http2WindowUpdateFields& v); |
| 77 void Append(const Http2AltSvcFields& v); |
| 78 |
| 79 // Methods for changing existing buffer contents (mostly focused on updating |
| 80 // the payload length). |
| 81 |
| 82 void WriteAt(base::StringPiece s, size_t offset); |
| 83 void WriteBytesAt(const void* data, uint32_t num_bytes, size_t offset); |
| 84 void WriteUInt24At(uint32_t value, size_t offset); |
| 85 |
| 86 // Set the payload length to the specified size. |
| 87 void SetPayloadLength(uint32_t payload_length); |
| 88 |
| 89 // Sets the payload length to the size of the buffer minus the size of |
| 90 // the frame header. |
| 91 size_t SetPayloadLength(); |
| 92 |
| 93 private: |
| 94 std::string buffer_; |
| 95 }; |
| 96 |
| 97 } // namespace test |
| 98 } // namespace net |
| 99 |
| 100 #endif // NET_HTTP2_TOOLS_HTTP2_FRAME_BUILDER_H_ |
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