minix/tests/lib/libc/net/h_hostent.c

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/* $NetBSD: h_hostent.c,v 1.1 2013/08/16 15:29:45 christos Exp $ */
/*-
* Copyright (c) 2013 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: h_hostent.c,v 1.1 2013/08/16 15:29:45 christos Exp $");
#include <stdio.h>
#include <string.h>
#include <nsswitch.h>
#include <netdb.h>
#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#include <err.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <arpa/nameser.h>
#include <arpa/inet.h>
#include "hostent.h"
static void
phostent(const struct hostent *h)
{
size_t i;
char buf[1024];
const int af = h->h_length == NS_INADDRSZ ? AF_INET : AF_INET6;
printf("name=%s, length=%d, addrtype=%d, aliases=[",
h->h_name, h->h_length, h->h_addrtype);
for (i = 0; h->h_aliases[i]; i++)
printf("%s%s", i == 0 ? "" : " ", h->h_aliases[i]);
printf("] addr_list=[");
for (i = 0; h->h_addr_list[i]; i++)
printf("%s%s", i == 0 ? "" : " ", inet_ntop(af,
h->h_addr_list[i], buf, (socklen_t)sizeof(buf)));
printf("]\n");
}
static void
usage(void)
{
(void)fprintf(stderr, "Usage: %s [-f <hostsfile>] "
"[-t <any|dns|nis|files>] "
"[-46a] <name|address>\n", getprogname());
exit(EXIT_FAILURE);
}
static void
getby(int (*f)(void *, void *, va_list), struct getnamaddr *info, ...)
{
va_list ap;
int e;
va_start(ap, info);
e = (*f)(info, NULL, ap);
va_end(ap);
switch (e) {
case NS_SUCCESS:
phostent(info->hp);
break;
default:
printf("error %d\n", e);
break;
}
}
static void
geta(struct hostent *hp) {
if (hp == NULL)
printf("error %d\n", h_errno);
else
phostent(hp);
}
int
main(int argc, char *argv[])
{
int (*f)(void *, void *, va_list) = NULL;
const char *type = "any";
int c, af, e, byaddr, len;
struct hostent hent;
struct getnamaddr info;
char buf[4096];
af = AF_INET;
byaddr = 0;
len = 0;
info.hp = &hent;
info.buf = buf;
info.buflen = sizeof(buf);
info.he = &e;
while ((c = getopt(argc, argv, "46af:t:")) != -1) {
switch (c) {
case '4':
af = AF_INET;
break;
case '6':
af = AF_INET6;
break;
case 'a':
byaddr++;
break;
case 't':
type = optarg;
break;
case 'f':
_hf_sethostsfile(optarg);
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc != 1)
usage();
switch (*type) {
case 'a':
break;
case 'd':
f = byaddr ? _dns_gethtbyaddr : _dns_gethtbyname;
break;
#ifdef YP
case 'n':
f = byaddr ? _yp_gethtbyaddr : _yp_gethtbyname;
break;
#endif
case 'f':
f = byaddr ? _hf_gethtbyaddr : _hf_gethtbyname;
break;
default:
errx(EXIT_FAILURE, "Unknown db type `%s'", type);
}
if (byaddr) {
struct in6_addr addr;
af = strchr(*argv, ':') ? AF_INET6 : AF_INET;
len = af == AF_INET ? NS_INADDRSZ : NS_IN6ADDRSZ;
if (inet_pton(af, *argv, &addr) == -1)
err(EXIT_FAILURE, "Can't parse `%s'", *argv);
if (*type == 'a')
geta(gethostbyaddr((const char *)&addr, len, af));
else
getby(f, &info, &addr, len, af);
} else {
if (*type == 'a')
geta(gethostbyname2(*argv, af));
else
getby(f, &info, *argv, len, af);
}
return 0;
}