File: [local] / src / usr.bin / whois / whois.c (download)
Revision 1.11, Wed Jul 12 18:01:57 2000 UTC (23 years, 10 months ago) by itojun
Branch: MAIN
CVS Tags: OPENBSD_2_9_BASE, OPENBSD_2_9, OPENBSD_2_8_BASE, OPENBSD_2_8 Changes since 1.10: +62 -47 lines
make whois(1) IPv6-ready. patch from deraadt + minor tweaks.
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/* $OpenBSD: whois.c,v 1.11 2000/07/12 18:01:57 itojun Exp $ */
/*
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1980, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)whois.c 8.1 (Berkeley) 6/6/93";
#else
static char rcsid[] = "$OpenBSD: whois.c,v 1.11 2000/07/12 18:01:57 itojun Exp $";
#endif
#endif /* not lint */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#define NICHOST "whois.crsnic.net"
#define INICHOST "whois.internic.net"
#define DNICHOST "whois.nic.mil"
#define GNICHOST "whois.nic.gov"
#define ANICHOST "whois.arin.net"
#define RNICHOST "whois.ripe.net"
#define PNICHOST "whois.apnic.net"
#define RUNICHOST "whois.ripn.net"
#define MNICHOST "whois.ra.net"
#define QNICHOST_TAIL ".whois-servers.net"
#define WHOIS_PORT 43
#define WHOIS_RECURSE 0x01
#define WHOIS_INIC_FALLBACK 0x02
#define WHOIS_QUICK 0x04
static void usage __P((void));
static void whois __P((char *, struct addrinfo *, int));
int
main(argc, argv)
int argc;
char **argv;
{
int ch, i, j, error;
int use_qnichost, flags;
char *host;
char *qnichost;
struct addrinfo hints, *res;
#ifdef SOCKS
SOCKSinit(argv[0]);
#endif
host = NULL;
qnichost = NULL;
flags = 0;
use_qnichost = 0;
while ((ch = getopt(argc, argv, "adgh:impqQrR")) != -1)
switch((char)ch) {
case 'a':
host = ANICHOST;
break;
case 'd':
host = DNICHOST;
break;
case 'g':
host = GNICHOST;
break;
case 'h':
host = optarg;
break;
case 'i':
host = INICHOST;
break;
case 'm':
host = MNICHOST;
break;
case 'p':
host = PNICHOST;
break;
case 'q':
/* default */
break;
case 'Q':
flags |= WHOIS_QUICK;
break;
case 'r':
host = RNICHOST;
break;
case 'R':
host = RUNICHOST;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (!argc)
usage();
/*
* If no nic host is specified, use whois-servers.net
* if there is a '.' in the name, else fall back to NICHOST.
*/
if (host == NULL) {
use_qnichost = 1;
host = NICHOST;
if (!(flags & WHOIS_QUICK))
flags |= WHOIS_INIC_FALLBACK | WHOIS_RECURSE;
}
while (argc--) {
if (use_qnichost) {
if (qnichost) {
free(qnichost);
qnichost = NULL;
}
for (i = j = 0; (*argv)[i]; i++)
if ((*argv)[i] == '.')
j = i;
if (j != 0) {
qnichost = (char *) calloc(i - j + 1 +
strlen(QNICHOST_TAIL), sizeof(char));
if (!qnichost)
err(1, "malloc");
strcpy(qnichost, *argv + j + 1);
strcat(qnichost, QNICHOST_TAIL);
memset(&hints, 0, sizeof(hints));
hints.ai_flags = 0;
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
error = getaddrinfo(qnichost, "whois",
&hints, &res);
if (error != 0)
errx(EX_NOHOST, "%s: %s", qnichost,
gai_strerror(error));
}
}
if (!qnichost) {
memset(&hints, 0, sizeof(hints));
hints.ai_flags = 0;
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
error = getaddrinfo(host, "whois", &hints, &res);
if (error != 0)
errx(EX_NOHOST, "%s: %s", host,
gai_strerror(error));
}
whois(*argv++, res, flags);
freeaddrinfo(res);
}
exit(0);
}
static void
whois(name, res, flags)
char *name;
struct addrinfo *res;
int flags;
{
FILE *sfi, *sfo;
char *buf, *p, *nhost;
size_t len;
int s, nomatch;
const char *reason = NULL;
s = -1;
for (/*nothing*/; res; res = res->ai_next) {
s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
if (s < 0) {
reason = "socket";
continue;
}
if (connect(s, res->ai_addr, res->ai_addrlen) < 0) {
reason = "connect";
close(s);
s = -1;
continue;
}
break; /*okay*/
}
if (s < 0) {
if (reason)
err(EX_OSERR, "%s", reason);
else
errx(EX_OSERR, "unknown error in connection attempt");
}
sfi = fdopen(s, "r");
sfo = fdopen(s, "w");
if (sfi == NULL || sfo == NULL)
err(EX_OSERR, "fdopen");
(void)fprintf(sfo, "%s\r\n", name);
(void)fflush(sfo);
nhost = NULL;
nomatch = 0;
while ((buf = fgetln(sfi, &len))) {
if (buf[len - 2] == '\r')
buf[len - 2] = '\0';
else
buf[len - 1] = '\0';
if ((flags & WHOIS_RECURSE) && !nhost &&
(p = strstr(buf, "Whois Server: "))) {
p += sizeof("Whois Server: ") - 1;
if ((len = strcspn(p, " \t\n\r"))) {
if ((nhost = malloc(len + 1)) == NULL)
err(1, "malloc");
memcpy(nhost, p, len);
nhost[len] = '\0';
}
}
if ((flags & WHOIS_INIC_FALLBACK) && !nhost && !nomatch &&
(p = strstr(buf, "No match for \""))) {
p += sizeof("No match for \"") - 1;
if ((len = strcspn(p, "\"")) && len == strlen(name) &&
strncasecmp(name, p, len) == 0)
nomatch = 1;
}
(void)puts(buf);
}
/* Do second lookup as needed */
if (nomatch && !nhost) {
(void)printf("Looking up %s at %s.\n\n", name, INICHOST);
nhost = INICHOST;
}
if (nhost) {
struct addrinfo hints, *res2;
int error;
memset(&hints, 0, sizeof(hints));
hints.ai_flags = 0;
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
error = getaddrinfo(nhost, "whois", &hints, &res2);
if (error != 0) {
warnx("%s: %s", nhost, gai_strerror(error));
return;
}
if (!nomatch)
free(nhost);
whois(name, res2, 0);
freeaddrinfo(res2);
}
}
static void
usage()
{
(void)fprintf(stderr,
"usage: whois [-adgimpqQrR6] [-h hostname] name ...\n");
exit(EX_USAGE);
}