diff options
Diffstat (limited to 'lib/libc/net/h_hostent.c')
| -rw-r--r-- | lib/libc/net/h_hostent.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/lib/libc/net/h_hostent.c b/lib/libc/net/h_hostent.c new file mode 100644 index 000000000000..4a7292320f3d --- /dev/null +++ b/lib/libc/net/h_hostent.c @@ -0,0 +1,195 @@ +/* $NetBSD: h_hostent.c,v 1.2 2014/01/09 02:18:10 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 1.2 2014/01/09 02:18:10 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" + +extern const char *__res_conf_name; + +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:r:t:")) != -1) { + switch (c) { + case '4': + af = AF_INET; + break; + case '6': + af = AF_INET6; + break; + case 'a': + byaddr++; + break; + case 'f': + _hf_sethostsfile(optarg); + break; + case 'r': + __res_conf_name = optarg; + break; + case 't': + type = 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; +} |