302 lines
7.1 KiB
C
302 lines
7.1 KiB
C
/*
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1980, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)whois.c 8.1 (Berkeley) 6/6/93";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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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 <err.h>
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#include <netdb.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 <sysexits.h>
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#include <unistd.h>
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#define NICHOST "whois.crsnic.net"
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#define INICHOST "whois.networksolutions.com"
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#define DNICHOST "whois.nic.mil"
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#define GNICHOST "whois.nic.gov"
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#define ANICHOST "whois.arin.net"
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#define RNICHOST "whois.ripe.net"
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#define PNICHOST "whois.apnic.net"
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#define RUNICHOST "whois.ripn.net"
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#define MNICHOST "whois.ra.net"
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#define QNICHOST_TAIL ".whois-servers.net"
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#define SNICHOST "whois.6bone.net"
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#define WHOIS_PORT 43
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#define WHOIS_RECURSE 0x01
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#define WHOIS_INIC_FALLBACK 0x02
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#define WHOIS_QUICK 0x04
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static void usage __P((void));
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static void whois __P((char *, struct sockaddr_in *, int));
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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int ch, i, j;
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int use_qnichost, flags;
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char *host;
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char *qnichost;
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struct servent *sp;
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struct hostent *hp;
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struct sockaddr_in sin;
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#ifdef SOCKS
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SOCKSinit(argv[0]);
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#endif
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host = NULL;
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qnichost = NULL;
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flags = 0;
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use_qnichost = 0;
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while ((ch = getopt(argc, argv, "adgh:impQrR6")) != -1) {
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switch((char)ch) {
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case 'a':
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host = ANICHOST;
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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 '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 'm':
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host = MNICHOST;
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break;
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case 'p':
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host = PNICHOST;
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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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case '6':
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host = SNICHOST;
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break;
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case '?':
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (!argc) {
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usage();
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}
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memset(&sin, 0, sizeof(sin));
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sin.sin_len = sizeof(sin);
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sin.sin_family = AF_INET;
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sp = getservbyname("whois", "tcp");
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if (sp == NULL) {
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sin.sin_port = htons(WHOIS_PORT);
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} else {
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sin.sin_port = sp->s_port;
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}
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/*
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* If no nic host is specified, use whois-servers.net
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* if there is a '.' in the name, else fall back to NICHOST.
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*/
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if (host == NULL) {
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use_qnichost = 1;
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host = NICHOST;
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if (!(flags & WHOIS_QUICK)) {
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flags |= WHOIS_INIC_FALLBACK | WHOIS_RECURSE;
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}
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}
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while (argc--) {
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if (use_qnichost) {
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if (qnichost) {
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free(qnichost);
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qnichost = NULL;
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}
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for (i = j = 0; (*argv)[i]; i++) {
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if ((*argv)[i] == '.') {
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j = i;
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}
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}
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if (j != 0) {
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qnichost = (char *) calloc(i - j + 1 +
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strlen(QNICHOST_TAIL), sizeof(char));
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if (!qnichost) {
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err(1, "calloc");
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}
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strcpy(qnichost, *argv + j + 1);
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strcat(qnichost, QNICHOST_TAIL);
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if (inet_aton(qnichost, &sin.sin_addr) == 0) {
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hp = gethostbyname2(qnichost, AF_INET);
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if (hp == NULL) {
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free(qnichost);
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qnichost = NULL;
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} else {
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sin.sin_addr = *(struct in_addr *)hp->h_addr_list[0];
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}
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}
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}
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}
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if (!qnichost && inet_aton(host, &sin.sin_addr) == 0) {
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hp = gethostbyname2(host, AF_INET);
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if (hp == NULL) {
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errx(EX_NOHOST, "%s: %s", host,
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hstrerror(h_errno));
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}
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host = hp->h_name;
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sin.sin_addr = *(struct in_addr *)hp->h_addr_list[0];
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}
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whois(*argv++, &sin, flags);
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}
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exit(0);
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}
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static void
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whois(name, sinp, flags)
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char *name;
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struct sockaddr_in *sinp;
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int flags;
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{
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FILE *sfi, *sfo;
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char *buf, *p, *nhost;
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size_t len;
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int s, nomatch;
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s = socket(PF_INET, SOCK_STREAM, 0);
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if (s < 0) {
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err(EX_OSERR, "socket");
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}
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if (connect(s, (struct sockaddr *)sinp, sizeof(*sinp)) < 0) {
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err(EX_OSERR, "connect");
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}
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sfi = fdopen(s, "r");
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sfo = fdopen(s, "w");
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if (sfi == NULL || sfo == NULL) {
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err(EX_OSERR, "fdopen");
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}
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(void)fprintf(sfo, "%s\r\n", name);
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(void)fflush(sfo);
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nhost = NULL;
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nomatch = 0;
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while ((buf = fgetln(sfi, &len))) {
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if (buf[len - 2] == '\r') {
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buf[len - 2] = '\0';
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} else {
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buf[len - 1] = '\0';
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}
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if ((flags & WHOIS_RECURSE) && !nhost &&
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(p = strstr(buf, "Whois Server: "))) {
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p += sizeof("Whois Server: ") - 1;
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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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}
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memcpy(nhost, p, len);
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nhost[len] = '\0';
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}
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}
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if ((flags & WHOIS_INIC_FALLBACK) && !nhost && !nomatch &&
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(p = strstr(buf, "No match for \""))) {
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p += sizeof("No match for \"") - 1;
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if ((len = strcspn(p, "\"")) &&
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strncasecmp(name, p, len) == 0 &&
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name[len] == '\0' &&
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strchr(name, '.') == NULL) {
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nomatch = 1;
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}
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}
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(void)puts(buf);
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}
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/* Do second lookup as needed */
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if (nomatch && !nhost) {
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(void)printf("Looking up %s at %s.\n\n", name, INICHOST);
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nhost = INICHOST;
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}
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if (nhost) {
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if (inet_aton(nhost, &sinp->sin_addr) == 0) {
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struct hostent *hp = gethostbyname2(nhost, AF_INET);
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if (hp == NULL) {
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return;
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}
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sinp->sin_addr = *(struct in_addr *)hp->h_addr_list[0];
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}
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if (!nomatch) {
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free(nhost);
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}
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whois(name, sinp, 0);
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}
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}
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static void
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usage()
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{
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(void)fprintf(stderr,
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"usage: whois [-adgimpQrR6] [-h hostname] name ...\n");
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exit(EX_USAGE);
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}
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