373 lines
9.8 KiB
C
373 lines
9.8 KiB
C
/* $NetBSD: whois.c,v 1.38 2020/03/01 02:26:16 sevan Exp $ */
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/* $OpenBSD: whois.c,v 1.58 2018/06/19 11:28:11 jca Exp $ */
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/*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1980, 1993\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static const char sccsid[] = "@(#)whois.c 8.1 (Berkeley) 6/6/93";
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#else
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__RCSID("$NetBSD: whois.c,v 1.38 2020/03/01 02:26:16 sevan Exp $");
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#endif
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <ctype.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#define ANICHOST "whois.arin.net"
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#define BNICHOST "whois.registro.br"
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#define CNICHOST "whois.corenic.net"
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#define DNICHOST "whois.nic.mil"
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#define FNICHOST "whois.afrinic.net"
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#define GNICHOST "whois.nic.gov"
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#define IANAHOST "whois.iana.org"
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#define INICHOST "whois.networksolutions.com"
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#define LNICHOST "whois.lacnic.net"
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#define MNICHOST "whois.ra.net"
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#define NICHOST "whois.crsnic.net"
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#define PDBHOST "whois.peeringdb.com"
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#define PNICHOST "whois.apnic.net"
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#define QNICHOST_TAIL ".whois-servers.net"
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#define RNICHOST "whois.ripe.net"
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#define RUNICHOST "whois.ripn.net"
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#define WHOIS_PORT "whois"
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#define WHOIS_SERVER_ID "Registrar WHOIS Server:"
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#define WHOIS_RECURSE 0x01
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#define WHOIS_QUICK 0x02
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static const char *port_whois = WHOIS_PORT;
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static const char *ip_whois[] =
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{ LNICHOST, RNICHOST, PNICHOST, FNICHOST, BNICHOST, NULL };
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static void usage(void) __dead;
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static int whois(const char *, const char *, const char *, int);
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static const char *choose_server(const char *, const char *, char **);
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int
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main(int argc, char *argv[])
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{
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int ch, flags, rval;
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const char *host, *name, *country;
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country = host = NULL;
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flags = rval = 0;
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while ((ch = getopt(argc, argv, "Aac:dfgh:Iilmp:PqQRr")) != -1)
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switch (ch) {
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case 'a':
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host = ANICHOST;
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break;
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case 'A':
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host = PNICHOST;
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break;
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case 'c':
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country = optarg;
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break;
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case 'd':
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host = DNICHOST;
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break;
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case 'f':
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host = FNICHOST;
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break;
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case 'g':
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host = GNICHOST;
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break;
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case 'h':
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host = optarg;
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break;
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case 'i':
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host = INICHOST;
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break;
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case 'I':
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host = IANAHOST;
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break;
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case 'l':
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host = LNICHOST;
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break;
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case 'm':
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host = MNICHOST;
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break;
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case 'p':
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port_whois = optarg;
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break;
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case 'P':
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host = PDBHOST;
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break;
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case 'q':
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/* deprecated, now the default */
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break;
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case 'Q':
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flags |= WHOIS_QUICK;
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break;
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case 'r':
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host = RNICHOST;
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break;
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case 'R':
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host = RUNICHOST;
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break;
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (!argc || (country != NULL && host != NULL))
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usage();
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if (host == NULL && country == NULL && !(flags & WHOIS_QUICK))
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flags |= WHOIS_RECURSE;
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for (name = *argv; (name = *argv) != NULL; argv++) {
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char *tofree = NULL;
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const char *server =
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host ? host : choose_server(name, country, &tofree);
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rval += whois(name, server, port_whois, flags);
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free(tofree);
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}
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return (rval);
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}
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static int
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whois(const char *query, const char *server, const char *port, int flags)
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{
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FILE *fp;
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char *buf, *p, *nhost, *nbuf = NULL;
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size_t len;
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int i, s, error;
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const char *reason = NULL, *fmt;
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struct addrinfo hints, *res, *ai;
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(void)memset(&hints, 0, sizeof(hints));
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hints.ai_flags = 0;
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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error = getaddrinfo(server, port, &hints, &res);
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if (error) {
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if (error == EAI_SERVICE)
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warnx("%s: bad port", port);
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else
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warnx("%s: %s", server, gai_strerror(error));
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return (1);
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}
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for (s = -1, ai = res; ai != NULL; ai = ai->ai_next) {
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s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
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if (s < 0) {
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error = errno;
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reason = "socket";
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continue;
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}
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if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
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error = errno;
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reason = "connect";
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close(s);
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s = -1;
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continue;
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}
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break; /*okay*/
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}
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freeaddrinfo(res);
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if (s < 0) {
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if (reason) {
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errno = error;
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warn("%s: %s", server, reason);
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} else
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warnx("Unknown error in connection attempt");
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return (1);
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}
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if (strcmp(server, "whois.denic.de") == 0 ||
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strcmp(server, "de" QNICHOST_TAIL) == 0)
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fmt = "-T dn,ace -C ISO-8859-1 ";
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else if (strcmp(server, "whois.dk-hostmaster.dk") == 0 ||
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strcmp(server, "dk" QNICHOST_TAIL) == 0)
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fmt = "--show-handles ";
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else
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fmt = "";
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fp = fdopen(s, "r+");
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if (fp == NULL)
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err(1, "fdopen");
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(void)fprintf(fp, "%s%s\r\n", fmt, query);
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(void)fflush(fp);
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nhost = NULL;
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while ((buf = fgetln(fp, &len)) != NULL) {
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p = buf + len - 1;
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if (isspace((unsigned char)*p)) {
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do
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*p = '\0';
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while (p > buf && isspace((unsigned char)*--p));
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} else {
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if ((nbuf = malloc(len + 1)) == NULL)
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err(1, "malloc");
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(void)memcpy(nbuf, buf, len);
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nbuf[len] = '\0';
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buf = nbuf;
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}
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(void)puts(buf);
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if (nhost != NULL || !(flags & WHOIS_RECURSE))
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continue;
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if ((p = strstr(buf, WHOIS_SERVER_ID))) {
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p += sizeof(WHOIS_SERVER_ID) - 1;
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while (isblank((unsigned char)*p))
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p++;
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if ((len = strcspn(p, " \t\n\r"))) {
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if ((nhost = malloc(len + 1)) == NULL)
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err(1, "malloc");
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(void)memcpy(nhost, p, len);
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nhost[len] = '\0';
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}
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} else if (strcmp(server, ANICHOST) == 0) {
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for (p = buf; *p != '\0'; p++)
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*p = tolower((unsigned char)*p);
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for (i = 0; ip_whois[i] != NULL; i++) {
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if (strstr(buf, ip_whois[i]) != NULL) {
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nhost = strdup(ip_whois[i]);
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if (nhost == NULL)
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err(1, "strdup");
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break;
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}
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}
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}
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}
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fclose(fp);
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free(nbuf);
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if (nhost != NULL) {
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error = whois(query, nhost, port, 0);
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free(nhost);
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}
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return (error);
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}
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/*
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* If no country is specified determine the top level domain from the query.
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* If the TLD is a number, query ARIN, otherwise, use TLD.whois-server.net.
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* If the domain does not contain '.', check to see if it is an NSI handle
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* (starts with '!') or a CORE handle (COCO-[0-9]+ or COHO-[0-9]+) or an
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* ASN (starts with AS) or IPv6 address (contains ':'). Fall back to
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* NICHOST for the non-handle and non-IPv6 case.
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*/
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static const char *
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choose_server(const char *name, const char *country, char **tofree)
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{
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static char *server;
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const char *qhead;
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char *ep;
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struct addrinfo hints, *res = NULL;
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(void)memset(&hints, 0, sizeof(hints));
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hints.ai_flags = 0;
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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if (country != NULL)
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qhead = country;
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else if ((qhead = strrchr(name, '.')) == NULL) {
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if (*name == '!')
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return (INICHOST);
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else if ((strncasecmp(name, "COCO-", 5) == 0 ||
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strncasecmp(name, "COHO-", 5) == 0) &&
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strtol(name + 5, &ep, 10) > 0 && *ep == '\0')
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return (CNICHOST);
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else if ((strncasecmp(name, "AS", 2) == 0) &&
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strtol(name + 2, &ep, 10) > 0 && *ep == '\0')
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return (MNICHOST);
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else if (strchr(name, ':') != NULL) /* IPv6 address */
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return (ANICHOST);
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else
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return (NICHOST);
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} else if (isdigit((unsigned char)*(++qhead)))
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return (ANICHOST);
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/*
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* Post-2003 ("new") gTLDs are all supposed to have "whois.nic.domain"
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* (per registry agreement), some older gTLDs also support this...
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*/
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if (asprintf(&server, "whois.nic.%s", qhead) == -1)
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err(1, NULL);
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/* most ccTLDs don't do this, but QNICHOST/whois-servers mostly works */
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if ((strlen(qhead) == 2 ||
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/* and is required for most of the <=2003 TLDs/gTLDs */
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strcasecmp(qhead, "org") == 0 ||
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strcasecmp(qhead, "com") == 0 ||
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strcasecmp(qhead, "net") == 0 ||
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strcasecmp(qhead, "cat") == 0 ||
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strcasecmp(qhead, "pro") == 0 ||
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strcasecmp(qhead, "info") == 0 ||
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strcasecmp(qhead, "aero") == 0 ||
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strcasecmp(qhead, "jobs") == 0 ||
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strcasecmp(qhead, "mobi") == 0 ||
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strcasecmp(qhead, "museum") == 0 ||
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/* for others, if whois.nic.TLD doesn't exist, try whois-servers */
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getaddrinfo(server, NULL, &hints, &res) != 0)) {
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free(server);
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if (asprintf(&server, "%s%s", qhead, QNICHOST_TAIL) == -1)
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err(1, NULL);
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}
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if (res != NULL)
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freeaddrinfo(res);
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*tofree = server;
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return (server);
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr,
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"usage: %s [-AadfgIilmPQRr] [-c country-code | -h host] "
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"[-p port] name ...\n", getprogname());
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exit(1);
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}
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