net/spdy/spdy_test_utils.cc

   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 "net/spdy/spdy_test_utils.h"
   6
   7 #include <cstring>
   8
   9 #include "base/logging.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/sys_byteorder.h"
  12 #include "testing/gtest/include/gtest/gtest.h"
  13
  14 namespace net {
  15
  16 namespace test {
  17
  18 std::string HexDumpWithMarks(const unsigned char* data, int length,
  19                              const bool* marks, int mark_length) {
  20   static const char kHexChars[] = "0123456789abcdef";
  21   static const int kColumns = 4;
  22
  23   const int kSizeLimit = 1024;
  24   if (length > kSizeLimit || mark_length > kSizeLimit) {
  25     LOG(ERROR) << "Only dumping first " << kSizeLimit << " bytes.";
  26     length = std::min(length, kSizeLimit);
  27     mark_length = std::min(mark_length, kSizeLimit);
  28   }
  29
  30   std::string hex;
  31   for (const unsigned char* row = data; length > 0;
  32        row += kColumns, length -= kColumns) {
  33     for (const unsigned char *p = row; p < row + 4; ++p) {
  34       if (p < row + length) {
  35         const bool mark =
  36             (marks && (p - data) < mark_length && marks[p - data]);
  37         hex += mark ? '*' : ' ';
  38         hex += kHexChars[(*p & 0xf0) >> 4];
  39         hex += kHexChars[*p & 0x0f];
  40         hex += mark ? '*' : ' ';
  41       } else {
  42         hex += "    ";
  43       }
  44     }
  45     hex = hex + "  ";
  46
  47     for (const unsigned char *p = row; p < row + 4 && p < row + length; ++p)
  48       hex += (*p >= 0x20 && *p <= 0x7f) ? (*p) : '.';
  49
  50     hex = hex + '\n';
  51   }
  52   return hex;
  53 }
  54
  55 void CompareCharArraysWithHexError(
  56     const std::string& description,
  57     const unsigned char* actual,
  58     const int actual_len,
  59     const unsigned char* expected,
  60     const int expected_len) {
  61   const int min_len = std::min(actual_len, expected_len);
  62   const int max_len = std::max(actual_len, expected_len);
  63   scoped_ptr<bool[]> marks(new bool[max_len]);
  64   bool identical = (actual_len == expected_len);
  65   for (int i = 0; i < min_len; ++i) {
  66     if (actual[i] != expected[i]) {
  67       marks[i] = true;
  68       identical = false;
  69     } else {
  70       marks[i] = false;
  71     }
  72   }
  73   for (int i = min_len; i < max_len; ++i) {
  74     marks[i] = true;
  75   }
  76   if (identical) return;
  77   ADD_FAILURE()
  78       << "Description:\n"
  79       << description
  80       << "\n\nExpected:\n"
  81       << HexDumpWithMarks(expected, expected_len, marks.get(), max_len)
  82       << "\nActual:\n"
  83       << HexDumpWithMarks(actual, actual_len, marks.get(), max_len);
  84 }
  85
  86 void SetFrameFlags(SpdyFrame* frame, uint8 flags, int spdy_version) {
  87   switch (spdy_version) {
  88     case 2:
  89     case 3:
  90       frame->data()[4] = flags;
  91       break;
  92     case 4:
  93       frame->data()[3] = flags;
  94       break;
  95     default:
  96       LOG(FATAL) << "Unsupported SPDY version.";
  97   }
  98 }
  99
 100 void SetFrameLength(SpdyFrame* frame, size_t length, int spdy_version) {
 101   switch (spdy_version) {
 102     case 2:
 103     case 3:
 104       CHECK_EQ(0u, length & ~kLengthMask);
 105       {
 106         int32 wire_length = base::HostToNet32(length);
 107         // The length field in SPDY 2 and 3 is a 24-bit (3B) integer starting at
 108         // offset 5.
 109         memcpy(frame->data() + 5, reinterpret_cast<char*>(&wire_length) + 1, 3);
 110       }
 111       break;
 112     case 4:
 113       CHECK_GT(1u<<16, length);
 114       {
 115         int32 wire_length = base::HostToNet16(static_cast<uint16>(length));
 116         memcpy(frame->data(),
 117                reinterpret_cast<char*>(&wire_length),
 118                sizeof(uint16));
 119       }
 120       break;
 121     default:
 122       LOG(FATAL) << "Unsupported SPDY version.";
 123   }
 124 }
 125
 126
 127 }  // namespace test
 128
 129 }  // namespace net