1 // Copyright 2014 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 "base/at_exit.h" 6 #include "base/command_line.h" 7 #include "base/files/file.h" 8 #include "base/files/file_util.h" 9 #include "base/strings/string_number_conversions.h" 10 #include "net/spdy/fuzzing/hpack_fuzz_util.h" 11 #include "net/spdy/hpack_constants.h" 12 #include "net/spdy/hpack_encoder.h" 13 14 namespace { 15 16 // Target file for generated HPACK header sets. 17 const char kFileToWrite[] = "file-to-write"; 18 19 // Number of header sets to generate. 20 const char kExampleCount[] = "example-count"; 21 22 } // namespace 23 24 using net::HpackFuzzUtil; 25 using std::map; 26 using std::string; 27 28 // Generates a configurable number of header sets (using HpackFuzzUtil), and 29 // sequentially encodes each header set with an HpackEncoder. Encoded header 30 // sets are written to the output file in length-prefixed blocks. 31 int main(int argc, char** argv) { 32 base::AtExitManager exit_manager; 33 34 base::CommandLine::Init(argc, argv); 35 const base::CommandLine& command_line = 36 *base::CommandLine::ForCurrentProcess(); 37 38 if (!command_line.HasSwitch(kFileToWrite) || 39 !command_line.HasSwitch(kExampleCount)) { 40 LOG(ERROR) << "Usage: " << argv[0] 41 << " --" << kFileToWrite << "=/path/to/file.out" 42 << " --" << kExampleCount << "=1000"; 43 return -1; 44 } 45 string file_to_write = command_line.GetSwitchValueASCII(kFileToWrite); 46 47 int example_count = 0; 48 base::StringToInt(command_line.GetSwitchValueASCII(kExampleCount), 49 &example_count); 50 51 DVLOG(1) << "Writing output to " << file_to_write; 52 base::File file_out(base::FilePath::FromUTF8Unsafe(file_to_write), 53 base::File::FLAG_CREATE_ALWAYS | base::File::FLAG_WRITE); 54 CHECK(file_out.IsValid()) << file_out.error_details(); 55 56 HpackFuzzUtil::GeneratorContext context; 57 HpackFuzzUtil::InitializeGeneratorContext(&context); 58 net::HpackEncoder encoder(net::ObtainHpackHuffmanTable()); 59 60 for (int i = 0; i != example_count; ++i) { 61 map<string, string> headers = 62 HpackFuzzUtil::NextGeneratedHeaderSet(&context); 63 64 string buffer; 65 CHECK(encoder.EncodeHeaderSet(headers, &buffer)); 66 67 string prefix = HpackFuzzUtil::HeaderBlockPrefix(buffer.size()); 68 69 CHECK_LT(0, file_out.WriteAtCurrentPos(prefix.data(), prefix.size())); 70 CHECK_LT(0, file_out.WriteAtCurrentPos(buffer.data(), buffer.size())); 71 } 72 CHECK(file_out.Flush()); 73 DVLOG(1) << "Generated " << example_count << " blocks."; 74 return 0; 75 } 76
