dns-dump.cc (2033B)
1 /* MIT License 2 * 3 * Copyright (c) The c-ares project and its contributors 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a copy 6 * of this software and associated documentation files (the "Software"), to deal 7 * in the Software without restriction, including without limitation the rights 8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 * copies of the Software, and to permit persons to whom the Software is 10 * furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice (including the next 13 * paragraph) shall be included in all copies or substantial portions of the 14 * Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 22 * SOFTWARE. 23 * 24 * SPDX-License-Identifier: MIT 25 */ 26 #include <sys/types.h> 27 #include <fcntl.h> 28 #ifdef _MSC_VER 29 # include <io.h> 30 #else 31 # include <unistd.h> 32 #endif 33 34 #include <iostream> 35 #include <vector> 36 37 #include "dns-proto.h" 38 39 namespace ares { 40 41 static void ShowFile(const char* filename) { 42 int fd = open(filename, O_RDONLY); 43 if (fd < 0) { 44 std::cerr << "Failed to open '" << filename << "'" << std::endl; 45 return; 46 } 47 std::vector<unsigned char> contents; 48 while (true) { 49 unsigned char buffer[1024]; 50 ares_ssize_t len = read(fd, buffer, sizeof(buffer)); 51 if (len <= 0) break; 52 contents.insert(contents.end(), buffer, buffer + len); 53 } 54 std::cout << PacketToString(contents) << std::endl; 55 } 56 57 } // namespace ares 58 59 int main(int argc, char* argv[]) { 60 for (int ii = 1; ii < argc; ++ii) { 61 ares::ShowFile(argv[ii]); 62 } 63 return 0; 64 } 65