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
ShowFile(const char * filename)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
main(int argc,char * argv[])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
66