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| 1 // Copyright (c) 2012 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 <limits> | |
| 6 | |
| 7 #include "base/sys_byteorder.h" | |
| 8 #include "net/spdy/spdy_frame_reader.h" | |
| 9 #include "net/spdy/spdy_protocol.h" | |
| 10 | |
| 11 namespace net { | |
| 12 | |
| 13 SpdyFrameReader::SpdyFrameReader(const char* data, const size_t len) | |
| 14 : data_(data), | |
| 15 len_(len), | |
| 16 ofs_(0) { | |
| 17 } | |
| 18 | |
| 19 bool SpdyFrameReader::ReadUInt8(uint8* result) { | |
| 20 // Make sure that we have the whole uint8. | |
| 21 if (!CanRead(1)) { | |
| 22 OnFailure(); | |
| 23 return false; | |
| 24 } | |
| 25 | |
| 26 // Read into result. | |
| 27 *result = *reinterpret_cast<const uint8*>(data_ + ofs_); | |
| 28 | |
| 29 // Iterate. | |
| 30 ofs_ += 1; | |
| 31 | |
| 32 return true; | |
| 33 } | |
| 34 | |
| 35 bool SpdyFrameReader::ReadUInt16(uint16* result) { | |
| 36 // Make sure that we have the whole uint16. | |
| 37 if (!CanRead(2)) { | |
| 38 OnFailure(); | |
| 39 return false; | |
| 40 } | |
| 41 | |
| 42 // Read into result. | |
| 43 *result = ntohs(*(reinterpret_cast<const uint16*>(data_ + ofs_))); | |
| 44 | |
| 45 // Iterate. | |
| 46 ofs_ += 2; | |
| 47 | |
| 48 return true; | |
| 49 } | |
| 50 | |
| 51 bool SpdyFrameReader::ReadUInt32(uint32* result) { | |
| 52 // Make sure that we have the whole uint32. | |
| 53 if (!CanRead(4)) { | |
| 54 OnFailure(); | |
| 55 return false; | |
| 56 } | |
| 57 | |
| 58 // Read into result. | |
| 59 *result = ntohl(*(reinterpret_cast<const uint32*>(data_ + ofs_))); | |
| 60 | |
| 61 // Iterate. | |
| 62 ofs_ += 4; | |
| 63 | |
| 64 return true; | |
| 65 } | |
| 66 | |
| 67 bool SpdyFrameReader::ReadUInt64(uint64* result) { | |
| 68 // Make sure that we have the whole uint64. | |
| 69 if (!CanRead(8)) { | |
| 70 OnFailure(); | |
| 71 return false; | |
| 72 } | |
| 73 | |
| 74 // Read into result. Network byte order is big-endian. | |
| 75 uint64 upper = ntohl(*(reinterpret_cast<const uint32*>(data_ + ofs_))); | |
| 76 uint64 lower = ntohl(*(reinterpret_cast<const uint32*>(data_ + ofs_ + 4))); | |
| 77 *result = (upper << 32) + lower; | |
| 78 | |
| 79 // Iterate. | |
| 80 ofs_ += 8; | |
| 81 | |
| 82 return true; | |
| 83 } | |
| 84 | |
| 85 bool SpdyFrameReader::ReadUInt31(uint32* result) { | |
| 86 bool success = ReadUInt32(result); | |
| 87 | |
| 88 // Zero out highest-order bit. | |
| 89 if (success) { | |
| 90 *result &= 0x7fffffff; | |
| 91 } | |
| 92 | |
| 93 return success; | |
| 94 } | |
| 95 | |
| 96 bool SpdyFrameReader::ReadUInt24(uint32* result) { | |
| 97 // Make sure that we have the whole uint24. | |
| 98 if (!CanRead(3)) { | |
| 99 OnFailure(); | |
| 100 return false; | |
| 101 } | |
| 102 | |
| 103 // Read into result. | |
| 104 *result = 0; | |
| 105 memcpy(reinterpret_cast<char*>(result) + 1, data_ + ofs_, 3); | |
| 106 *result = ntohl(*result); | |
| 107 | |
| 108 // Iterate. | |
| 109 ofs_ += 3; | |
| 110 | |
| 111 return true; | |
| 112 } | |
| 113 | |
| 114 bool SpdyFrameReader::ReadStringPiece16(base::StringPiece* result) { | |
| 115 // Read resultant length. | |
| 116 uint16 result_len; | |
| 117 if (!ReadUInt16(&result_len)) { | |
| 118 // OnFailure() already called. | |
| 119 return false; | |
| 120 } | |
| 121 | |
| 122 // Make sure that we have the whole string. | |
| 123 if (!CanRead(result_len)) { | |
| 124 OnFailure(); | |
| 125 return false; | |
| 126 } | |
| 127 | |
| 128 // Set result. | |
| 129 result->set(data_ + ofs_, result_len); | |
| 130 | |
| 131 // Iterate. | |
| 132 ofs_ += result_len; | |
| 133 | |
| 134 return true; | |
| 135 } | |
| 136 | |
| 137 bool SpdyFrameReader::ReadStringPiece32(base::StringPiece* result) { | |
| 138 // Read resultant length. | |
| 139 uint32 result_len; | |
| 140 if (!ReadUInt32(&result_len)) { | |
| 141 // OnFailure() already called. | |
| 142 return false; | |
| 143 } | |
| 144 | |
| 145 // Make sure that we have the whole string. | |
| 146 if (!CanRead(result_len)) { | |
| 147 OnFailure(); | |
| 148 return false; | |
| 149 } | |
| 150 | |
| 151 // Set result. | |
| 152 result->set(data_ + ofs_, result_len); | |
| 153 | |
| 154 // Iterate. | |
| 155 ofs_ += result_len; | |
| 156 | |
| 157 return true; | |
| 158 } | |
| 159 | |
| 160 bool SpdyFrameReader::ReadBytes(void* result, size_t size) { | |
| 161 // Make sure that we have enough data to read. | |
| 162 if (!CanRead(size)) { | |
| 163 OnFailure(); | |
| 164 return false; | |
| 165 } | |
| 166 | |
| 167 // Read into result. | |
| 168 memcpy(result, data_ + ofs_, size); | |
| 169 | |
| 170 // Iterate. | |
| 171 ofs_ += size; | |
| 172 | |
| 173 return true; | |
| 174 } | |
| 175 | |
| 176 bool SpdyFrameReader::Seek(size_t size) { | |
| 177 if (!CanRead(size)) { | |
| 178 OnFailure(); | |
| 179 return false; | |
| 180 } | |
| 181 | |
| 182 // Iterate. | |
| 183 ofs_ += size; | |
| 184 | |
| 185 return true; | |
| 186 } | |
| 187 | |
| 188 bool SpdyFrameReader::IsDoneReading() const { | |
| 189 return len_ == ofs_; | |
| 190 } | |
| 191 | |
| 192 bool SpdyFrameReader::CanRead(size_t bytes) const { | |
| 193 return bytes <= (len_ - ofs_); | |
| 194 } | |
| 195 | |
| 196 void SpdyFrameReader::OnFailure() { | |
| 197 // Set our iterator to the end of the buffer so that further reads fail | |
| 198 // immediately. | |
| 199 ofs_ = len_; | |
| 200 } | |
| 201 | |
| 202 } // namespace net | |
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Chromium Code Reviews
Issue 992733002:
Remove //net (except for Android test stuff) and sdch (Closed)
Base URL: git@github.com:domokit/mojo.git@master