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marignotti/bin/whois/whois.c

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/*
* 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.
*/
#ifdef __ORCAC__
#pragma optimize 79
#endif
#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 */
#if 0
#ifndef lint
static char sccsid[] = "@(#)whois.c 8.1 (Berkeley) 6/6/93";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
#ifndef __GNO__
#ifndef __APPLE__
__FBSDID("$FreeBSD: src/usr.bin/whois/whois.c,v 1.41 2004/08/25 15:34:44 mbr Exp $");
#endif
#endif
#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 <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#ifdef __GNO__
#include <gno/gno.h>
#undef getc
#undef putc
#undef getchar
#undef putchar
#endif
#define ABUSEHOST "whois.abuse.net"
#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 LNICHOST "whois.lacnic.net"
#define RNICHOST "whois.ripe.net"
#define PNICHOST "whois.apnic.net"
#define MNICHOST "whois.ra.net"
#define QNICHOST_TAIL ".whois-servers.net"
#define SNICHOST "whois.6bone.net"
#define BNICHOST "whois.registro.br"
#define NORIDHOST "whois.norid.no"
#define IANAHOST "whois.iana.org"
#define GERMNICHOST "de.whois-servers.net"
#define DEFAULT_PORT "nicname"
#define WHOIS_SERVER_ID "Whois Server: "
#define WHOIS_ORG_SERVER_ID "Registrant Street1:Whois Server:"
#define WHOIS_RECURSE 0x01
#define WHOIS_QUICK 0x02
#define ishost(h) (isalnum((unsigned char)h) || h == '.' || h == '-')
const char *ip_whois[] = { LNICHOST, RNICHOST, PNICHOST, BNICHOST, NULL };
const char *port = DEFAULT_PORT;
static char *choose_server(char *);
#ifndef __GNO__
static struct addrinfo *gethostinfo(char const *host, int exit_on_error);
#endif
#ifndef __GNO__
#ifdef __APPLE__
static void s_asprintf(char **ret, const char *format, ...) __attribute__((__format__(printf, 2, 3)));
#else
static void s_asprintf(char **ret, const char *format, ...) __printflike(2, 3);
#endif
#endif
static void usage(void);
static void whois(const char *, const char *, int);
#ifdef __GNO__
/*
* Find the first occurrence of find in s, where the search is limited to the
* first slen characters of s.
*/
char *
strnstr(const char *s, const char *find, size_t slen)
{
char c, sc;
size_t len;
if ((c = *find++) != '\0') {
len = strlen(find);
do {
do {
if (slen-- < 1 || (sc = *s++) == '\0')
return (NULL);
} while (sc != c);
if (len > slen)
return (NULL);
} while (strncmp(s, find, len) != 0);
s--;
}
return ((char *)s);
}
// not yet in the standard library.
size_t
strnlen(const char *s, size_t maxlen)
{
size_t len;
for (len = 0; len < maxlen; len++, s++) {
if (!*s)
break;
}
return (len);
}
char *
strndup(const char *str, size_t n)
{
size_t len;
char *copy;
len = strnlen(str, n);
if ((copy = malloc(len + 1)) == NULL)
return (NULL);
memcpy(copy, str, len);
copy[len] = '\0';
return (copy);
}
char *
stpcpy(char * to, const char * from)
{
for (; (*to = *from); ++from, ++to);
return(to);
}
char *xstrndup(const char *s1, size_t n)
{
char *rv;
rv = strndup(s1, n);
if (!rv)
{
err(EX_OSERR, "strndup()");
}
return rv;
}
char *xstrdup(const char *s1)
{
char *rv;
rv = strdup(s1);
if (!rv)
{
err(EX_OSERR, "strdup()");
}
return rv;
}
char *xstrdup2(const char *s1, const char *s2)
{
int l1, l2;
char *rv;
char *tmp;
l1 = strlen(s1);
l2 = strlen(s2);
rv = (char *)malloc(l1 + l2 + 1);
if (!rv)
{
err(EX_OSERR, "malloc()");
}
tmp = stpcpy(rv, s1);
tmp = stpcpy(tmp, s2);
return rv;
}
#endif
int
main(int argc, char **argv)
{
const char *country, *host;
char *qnichost;
int ch, flags, use_qnichost;
#ifdef __GNO__
REPORT_STACK();
#endif
#ifdef SOCKS
SOCKSinit(argv[0]);
#endif
country = host = qnichost = NULL;
flags = use_qnichost = 0;
while ((ch = getopt(argc, argv, "aAbc:dgh:iIlmp:QrR6")) != -1) {
switch (ch) {
case 'a':
host = ANICHOST;
break;
case 'A':
host = PNICHOST;
break;
case 'b':
host = ABUSEHOST;
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 'I':
host = IANAHOST;
break;
case 'l':
host = LNICHOST;
break;
case 'm':
host = MNICHOST;
break;
case 'p':
port = optarg;
break;
case 'Q':
flags |= WHOIS_QUICK;
break;
case 'r':
host = RNICHOST;
break;
case 'R':
warnx("-R is deprecated; use '-c ru' instead");
country = "ru";
break;
case '6':
host = SNICHOST;
break;
case '?':
default:
usage();
/* NOTREACHED */
}
}
argc -= optind;
argv += optind;
if (!argc || (country != NULL && host != NULL))
usage();
/*
* If no host or 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 '.', fall
* back to NICHOST.
*/
if (host == NULL && country == NULL) {
use_qnichost = 1;
host = NICHOST;
if (!(flags & WHOIS_QUICK))
flags |= WHOIS_RECURSE;
}
while (argc-- > 0) {
if (country != NULL) {
#ifdef __GNO__
qnichost = xstrdup2(country, QNICHOST_TAIL);
#else
s_asprintf(&qnichost, "%s%s", country, QNICHOST_TAIL);
#endif
whois(*argv, qnichost, flags);
} else if (use_qnichost)
if ((qnichost = choose_server(*argv)) != NULL)
whois(*argv, qnichost, flags);
if (qnichost == NULL)
whois(*argv, host, flags);
free(qnichost);
qnichost = NULL;
argv++;
}
exit(0);
}
/*
* This function will remove any trailing periods from domain, after which it
* returns a pointer to newly allocated memory containing the whois server to
* be queried, or a NULL if the correct server couldn't be determined. The
* caller must remember to free(3) the allocated memory.
*/
static char *
choose_server(char *domain)
{
char *pos, *retval;
for (pos = strchr(domain, '\0'); pos > domain && *--pos == '.';)
*pos = '\0';
if (*domain == '\0')
errx(EX_USAGE, "can't search for a null string");
if (strlen(domain) > sizeof("-NORID")-1 &&
strcasecmp(domain + strlen(domain) - sizeof("-NORID") + 1,
"-NORID") == 0) {
#ifdef __GNO__
retval = xstrdup(NORIDHOST);
#else
s_asprintf(&retval, "%s", NORIDHOST);
#endif
return (retval);
}
while (pos > domain && *pos != '.')
--pos;
if (pos <= domain)
return (NULL);
if (isdigit((unsigned char)*++pos))
#ifdef __GNO__
retval = xstrdup(ANICHOST);
#else
s_asprintf(&retval, "%s", ANICHOST);
#endif
else
#ifdef __GNO__
retval = xstrdup2(pos, QNICHOST_TAIL);
#else
s_asprintf(&retval, "%s%s", pos, QNICHOST_TAIL);
#endif
return (retval);
}
#ifndef __GNO__
static struct addrinfo *
gethostinfo(char const *host, int exit_on_error)
{
struct addrinfo hints, *res;
int error;
memset(&hints, 0, sizeof(hints));
hints.ai_flags = 0;
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
error = getaddrinfo(host, port, &hints, &res);
if (error) {
warnx("%s: %s", host, gai_strerror(error));
if (exit_on_error)
exit(EX_NOHOST);
return (NULL);
}
return (res);
}
#endif
#ifndef __GNO__
/*
* Wrapper for asprintf(3) that exits on error.
*/
static void
s_asprintf(char **ret, const char *format, ...)
{
va_list ap;
va_start(ap, format);
if (vasprintf(ret, format, ap) == -1) {
va_end(ap);
err(EX_OSERR, "vasprintf()");
}
va_end(ap);
}
#endif
static void
whois(const char *query, const char *hostname, int flags)
{
FILE *sfi, *sfo;
char *buf, *host, *nhost, *p;
int i, s;
size_t c, len;
#ifdef __GNO__
// no getaddrinfo (yet)
// take from old whois.
struct hostent *hp;
struct servent *sp;
struct sockaddr_in sin;
hp = gethostbyname(hostname);
if (hp == NULL)
{
err(EX_OSERR, "gethostbyname(%s)", hostname);
}
s = socket(hp->h_addrtype, SOCK_STREAM, 0);
if (s < 0)
{
err(EX_OSERR, "socket()");
}
bzero((caddr_t)&sin, sizeof (sin));
bcopy(hp->h_addr, (char *)&sin.sin_addr, hp->h_length);
sp = getservbyname("whois", "tcp");
if (sp == NULL) {
(void)fprintf(stderr, "whois: whois/tcp: unknown service\n");
exit(1);
}
sin.sin_port = sp->s_port;
if (connect(s, (struct __SOCKADDR *)&sin, sizeof(sin)) < 0)
{
err(EX_OSERR, "connect()");
}
#else
struct addrinfo *hostres, *res;
hostres = gethostinfo(hostname, 1);
for (res = hostres; 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);
}
freeaddrinfo(hostres);
if (res == NULL)
err(EX_OSERR, "connect()");
#endif
#ifdef __GNO__
sfi = fdopen(s, "rb");
sfo = fdopen(s, "wb");
#else
sfi = fdopen(s, "r");
sfo = fdopen(s, "w");
#endif
if (sfi == NULL || sfo == NULL)
err(EX_OSERR, "fdopen()");
if (strcmp(hostname, GERMNICHOST) == 0) {
fprintf(sfo, "-T dn,ace -C US-ASCII %s\r\n", query);
} else {
fprintf(sfo, "%s\r\n", query);
}
fflush(sfo);
nhost = NULL;
while ((buf = fgetln(sfi, &len)) != NULL) {
while (len > 0 && isspace((unsigned char)buf[len - 1]))
buf[--len] = '\0';
printf("%.*s\n", (int)len, buf);
if ((flags & WHOIS_RECURSE) && nhost == NULL) {
host = strnstr(buf, WHOIS_SERVER_ID, len);
if (host != NULL) {
host += sizeof(WHOIS_SERVER_ID) - 1;
for (p = host; p < buf + len; p++) {
if (!ishost(*p)) {
*p = '\0';
break;
}
}
#ifdef __GNO__
nhost = xstrndup(host, (int)(buf + len - host));
#else
s_asprintf(&nhost, "%.*s",
(int)(buf + len - host), host);
#endif
} else if ((host =
strnstr(buf, WHOIS_ORG_SERVER_ID, len)) != NULL) {
host += sizeof(WHOIS_ORG_SERVER_ID) - 1;
for (p = host; p < buf + len; p++) {
if (!ishost(*p)) {
*p = '\0';
break;
}
}
#ifdef __GNO__
nhost = xstrndup(host, (int)(buf + len - host));
#else
s_asprintf(&nhost, "%.*s",
(int)(buf + len - host), host);
#endif
} else if (strcmp(hostname, ANICHOST) == 0) {
for (c = 0; c <= len; c++)
buf[c] = tolower((int)buf[c]);
for (i = 0; ip_whois[i] != NULL; i++) {
if (strnstr(buf, ip_whois[i], len) !=
NULL) {
#ifdef __GNO__
nhost = xstrdup(ip_whois[i]);
#else
s_asprintf(&nhost, "%s",
ip_whois[i]);
#endif
break;
}
}
}
}
}
if (nhost != NULL) {
whois(query, nhost, 0);
free(nhost);
}
}
static void
usage(void)
{
fprintf(stderr,
"usage: whois [-aAbdgiIlmQrR6] [-c country-code | -h hostname] "
"[-p port] name ...\n");
exit(EX_USAGE);
}
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