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/* $OpenBSD: getnameinfo.c,v 1.2 2018/12/15 15:16:12 eric Exp $ */
/*
* Copyright (c) 2012 Eric Faurot <eric@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <err.h>
#include <errno.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "common.h"
static void
usage(void)
{
extern const char * __progname;
fprintf(stderr, "usage: %s [-DFHNSe] [-p portno] <addr...>\n", __progname);
exit(1);
}
int
main(int argc, char *argv[])
{
char serv[1024];
char host[1024];
const char *e;
int i, ch, flags = 0, port = 0;
struct sockaddr_storage ss;
struct sockaddr *sa;
sa = (struct sockaddr*)&ss;
while((ch = getopt(argc, argv, "DFHNR:Saep:")) != -1) {
switch(ch) {
case 'D':
flags |= NI_DGRAM;
break;
case 'F':
flags |= NI_NOFQDN;
break;
case 'H':
flags |= NI_NUMERICHOST;
break;
case 'N':
flags |= NI_NAMEREQD;
break;
case 'R':
parseresopt(optarg);
break;
case 'S':
flags |= NI_NUMERICSERV;
break;
case 'e':
long_err += 1;
break;
case 'p':
port = strtonum(optarg, 0, 65535, &e);
if (e)
usage();
break;
default:
usage();
/* NOTREACHED */
}
}
argc -= optind;
argv += optind;
for(i = 0; i < argc; i++) {
if (i)
printf("\n");
printf("===> \"%s\"\n", argv[i]);
if (sockaddr_from_str(sa, AF_UNSPEC, argv[i]) == -1) {
printf(" => invalid address\n");
continue;
}
if (sa->sa_family == PF_INET)
((struct sockaddr_in *)sa)->sin_port = htons(port);
else if (sa->sa_family == PF_INET6)
((struct sockaddr_in6 *)sa)->sin6_port = htons(port);
errno = 0;
h_errno = 0;
gai_errno = 0;
rrset_errno = 0;
gai_errno = getnameinfo(sa, sa->sa_len, host, sizeof host, serv,
sizeof serv, flags);
if (gai_errno == 0)
printf(" %s:%s\n", host, serv);
print_errors();
}
return (0);
}
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