A C library for asynchronous DNS requests (grpc依赖)
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#include <sys/types.h>
#include <fcntl.h>
#ifdef _MSC_VER
# include <io.h>
#else
# include <unistd.h>
#endif
#include <iostream>
#include <vector>
#include "dns-proto.h"
namespace ares {
static void ShowFile(const char* filename) {
int fd = open(filename, O_RDONLY);
if (fd < 0) {
std::cerr << "Failed to open '" << filename << "'" << std::endl;
return;
}
std::vector<unsigned char> contents;
while (true) {
unsigned char buffer[1024];
int len = read(fd, buffer, sizeof(buffer));
if (len <= 0) break;
contents.insert(contents.end(), buffer, buffer + len);
}
std::cout << PacketToString(contents) << std::endl;
}
} // namespace ares
int main(int argc, char* argv[]) {
for (int ii = 1; ii < argc; ++ii) {
ares::ShowFile(argv[ii]);
}
return 0;
}