dnsname.c

#include "lib/socket.h"
#include "lib/io.h"
#include "lib/iarray.h"
#include "lib/case.h"
#include "lib/open.h"
#include "lib/stralloc.h"
#include "lib/scan.h"
#include "lib/fmt.h"
#include "lib/str.h"
#include "lib/tai.h"
#include "lib/taia.h"
#include "lib/buffer.h"
#include "lib/dns.h"
#include "lib/errmsg.h"
#include "lib/ip4.h"
#include "lib/ip6.h"
#include "lib/byte.h"
#include <errno.h>

#define FATAL "dnsname: fatal: "

static char seed[128];

char ip[16];
static stralloc out;

int
main(int argc, char** argv) {
  errmsg_iam(argv[0]);
  dns_random_init(seed);

  if(*argv)
    ++argv;

  while(*argv) {
    byte_copy(ip, 12, V4mappedprefix);

    if(!scan_ip4(*argv, &ip[12]) && !scan_ip6(*argv, ip)) {
      errmsg_warnsys("unable to parse IP address ", *argv, 0);
      return 111;
    }

    if(dns_name6(&out, ip) == -1) {
      errmsg_warnsys("unable to find                      ost name for ", *argv, ": ", 0);
      return 111;
    }

    buffer_put(buffer_1, out.s, out.len);
    buffer_puts(buffer_1, "\n");

    ++argv;
  }

  buffer_flush(buffer_1);

  return 0;
}