freebsd-dev/usr.bin/whois/whois.c
2001-06-01 13:43:20 +00:00

310 lines
7.3 KiB
C

/*
* 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 const 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";
#endif
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <err.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#define NICHOST "whois.crsnic.net"
#define INICHOST "whois.networksolutions.com"
#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 SNICHOST "whois.6bone.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:impQrR6")) != -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':
flags |= WHOIS_QUICK;
break;
case 'r':
host = RNICHOST;
break;
case 'R':
host = RUNICHOST;
break;
case '6':
host = SNICHOST;
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) {
if (isdigit(*(*argv + j + 1))) {
(void) asprintf(&qnichost, "%s",
ANICHOST);
} else {
qnichost = (char *) calloc(i - j
+ 1 + strlen(QNICHOST_TAIL),
sizeof(char));
if (!qnichost) {
err(1, "calloc");
}
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;
for (; res; res = res->ai_next) {
s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
if (s < 0) {
continue;
}
if (connect(s, res->ai_addr, res->ai_addrlen) == 0) {
break;
}
close(s);
}
if (res == NULL) {
err(EX_OSERR, "connect");
}
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, "\"")) &&
strncasecmp(name, p, len) == 0 &&
name[len] == '\0' &&
strchr(name, '.') == NULL) {
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 [-adgimpQrR6] [-h hostname] name ...\n");
exit(EX_USAGE);
}