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NetBSD/usr.bin/whois/whois.c

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/* $NetBSD: whois.c,v 1.26 2004/01/05 23:23:37 jmmv Exp $ */
/* $OpenBSD: whois.c,v 1.28 2003/09/18 22:16:15 fgsch 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. 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.
*/
#include <sys/cdefs.h>
#ifndef lint
__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 const char sccsid[] = "@(#)whois.c 8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: whois.c,v 1.26 2004/01/05 23:23:37 jmmv 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 <ctype.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#define NICHOST "whois.crsnic.net"
#define INICHOST "whois.networksolutions.com"
#define CNICHOST "whois.corenic.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 LNICHOST "whois.lacnic.net"
#define SNICHOST "whois.6bone.net"
#define BNICHOST "whois.registro.br"
#define QNICHOST_TAIL ".whois-servers.net"
#define WHOIS_PORT "whois"
#define WHOIS_SERVER_ID "Whois Server:"
#define WHOIS_RECURSE 0x01
#define WHOIS_QUICK 0x02
static const char *port_whois = WHOIS_PORT;
static const char *ip_whois[] =
{ LNICHOST, RNICHOST, PNICHOST, BNICHOST, NULL };
static void usage(void) __attribute__((__noreturn__));
static int whois(const char *, const char *, const char *, int);
static char *choose_server(const char *, const char *);
int
main(int argc, char *argv[])
{
int ch, flags, rval;
char *host, *name, *country, *server;
#ifdef SOCKS
SOCKSinit(argv[0]);
#endif
country = host = server = NULL;
flags = rval = 0;
while ((ch = getopt(argc, argv, "6Aac:dgh:ilmp:qQRr")) != -1)
switch(ch) {
case 'a':
host = ANICHOST;
break;
case 'A':
host = PNICHOST;
break;
case 'c':
country = optarg;
break;
case 'd':
host = DNICHOST;
break;
case 'g':
host = GNICHOST;
break;
case 'h':
host = optarg;
break;
case 'i':
host = INICHOST;
break;
case 'l':
host = LNICHOST;
break;
case 'm':
host = MNICHOST;
break;
case 'p':
port_whois = optarg;
break;
case 'q':
/* deprecated, now the default */
break;
case 'Q':
flags |= WHOIS_QUICK;
break;
case 'r':
host = RNICHOST;
break;
case 'R':
host = RUNICHOST;
break;
case '6':
host = SNICHOST;
break;
default:
usage();
}
argc -= optind;
argv += optind;
if (!argc || (country != NULL && host != NULL))
usage();
if (host == NULL && country == NULL && !(flags & WHOIS_QUICK))
flags |= WHOIS_RECURSE;
for (name = *argv; (name = *argv) != NULL; argv++)
rval += whois(name, host ? host : choose_server(name, country),
port_whois, flags);
return rval;
}
static int
whois(const char *query, const char *server, const char *port, int flags)
{
FILE *sfi, *sfo;
char *buf, *p, *nhost, *nbuf = NULL;
size_t len;
int i, s, error;
const char *reason = NULL;
struct addrinfo hints, *res, *ai;
(void)memset(&hints, 0, sizeof(hints));
hints.ai_flags = 0;
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
error = getaddrinfo(server, port, &hints, &res);
if (error) {
warnx("%s: %s", server, gai_strerror(error));
return (1);
}
for (s = -1, ai = res; ai != NULL; ai = ai->ai_next) {
s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
if (s < 0) {
error = errno;
reason = "socket";
continue;
}
if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
error = errno;
reason = "connect";
close(s);
s = -1;
continue;
}
break; /*okay*/
}
if (s < 0) {
if (reason) {
errno = error;
warn("%s: %s", server, reason);
} else
warnx("Unknown error in connection attempt");
freeaddrinfo(res);
return (1);
}
sfi = fdopen(s, "r");
sfo = fdopen(s, "w");
if (sfi == NULL || sfo == NULL)
err(1, "fdopen");
(void)fprintf(sfo, "%s\r\n", query);
(void)fflush(sfo);
nhost = NULL;
while ((buf = fgetln(sfi, &len)) != NULL) {
p = buf + len - 1;
if (isspace((unsigned char)*p)) {
do
*p = '\0';
while (p > buf && isspace((unsigned char)*--p));
} else {
if ((nbuf = malloc(len + 1)) == NULL)
err(1, "malloc");
(void)memcpy(nbuf, buf, len);
nbuf[len] = '\0';
buf = nbuf;
}
(void)puts(buf);
if (nhost != NULL || !(flags & WHOIS_RECURSE))
continue;
if ((p = strstr(buf, WHOIS_SERVER_ID))) {
p += sizeof(WHOIS_SERVER_ID) - 1;
while (isblank((unsigned char)*p))
p++;
if ((len = strcspn(p, " \t\n\r"))) {
if ((nhost = malloc(len + 1)) == NULL)
err(1, "malloc");
(void)memcpy(nhost, p, len);
nhost[len] = '\0';
}
} else if (strcmp(server, ANICHOST) == 0) {
for (p = buf; *p != '\0'; p++)
*p = tolower((unsigned char)*p);
for (i = 0; ip_whois[i] != NULL; i++) {
if (strstr(buf, ip_whois[i]) != NULL) {
nhost = strdup(ip_whois[i]);
if (nhost == NULL)
err(1, "strdup");
break;
}
}
}
}
if (nbuf != NULL)
free(nbuf);
if (nhost != NULL) {
error = whois(query, nhost, port, 0);
free(nhost);
}
freeaddrinfo(res);
return (error);
}
/*
* If no country is specified determine the top level domain from the query.
* If the TLD is a number, query ARIN, otherwise, use TLD.whois-server.net.
* If the domain does not contain '.', check to see if it is an NSI handle
* (starts with '!') or a CORE handle (COCO-[0-9]+ or COHO-[0-9]+).
* Fall back to NICHOST for the non-handle case.
*/
static char *
choose_server(const char *name, const char *country)
{
static char *server;
char *nserver;
const char *qhead;
char *ep;
size_t len;
if (country != NULL)
qhead = country;
else if ((qhead = strrchr(name, '.')) == NULL) {
if (*name == '!')
return (INICHOST);
else if ((strncasecmp(name, "COCO-", 5) == 0 ||
strncasecmp(name, "COHO-", 5) == 0) &&
strtol(name + 5, &ep, 10) > 0 && *ep == '\0')
return (CNICHOST);
else
return (NICHOST);
} else if (isdigit((unsigned char)*(++qhead)))
return (ANICHOST);
len = strlen(qhead) + sizeof(QNICHOST_TAIL);
if ((nserver = realloc(server, len)) == NULL)
err(1, "realloc");
server = nserver;
(void)strlcpy(server, qhead, len);
(void)strlcat(server, QNICHOST_TAIL, len);
return (server);
}
static void
usage(void)
{
(void)fprintf(stderr,
"usage: %s [-6AadgilmQRr] [-c country-code | -h hostname] "
"[-p port] name ...\n", getprogname());
exit(1);
}
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