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-rw-r--r--adv_cmds/whois/whois.c629
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diff --git a/adv_cmds/whois/whois.c b/adv_cmds/whois/whois.c
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+++ b/adv_cmds/whois/whois.c
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+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * 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.
+ */
+
+#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>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/poll.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>
+#include <fcntl.h>
+#include <errno.h>
+
+#ifdef __APPLE__
+#ifndef SOCK_NONBLOCK
+#define SOCK_NONBLOCK 0
+#endif
+#ifndef INFTIM
+#define INFTIM -1
+#endif
+#endif
+
+#define ABUSEHOST "whois.abuse.net"
+#define ANICHOST "whois.arin.net"
+#define DENICHOST "whois.denic.de"
+#define DKNICHOST "whois.dk-hostmaster.dk"
+#define FNICHOST "whois.afrinic.net"
+#define GNICHOST "whois.nic.gov"
+#define IANAHOST "whois.iana.org"
+#define INICHOST "whois.internic.net"
+#define KNICHOST "whois.krnic.net"
+#define LNICHOST "whois.lacnic.net"
+#define MNICHOST "whois.ra.net"
+#define PDBHOST "whois.peeringdb.com"
+#define PNICHOST "whois.apnic.net"
+#define QNICHOST_TAIL ".whois-servers.net"
+#define RNICHOST "whois.ripe.net"
+#define VNICHOST "whois.verisign-grs.com"
+
+#ifdef __APPLE__
+#define DEFAULT_PORT "nicname"
+#else
+#define DEFAULT_PORT "whois"
+#endif
+
+#define WHOIS_RECURSE 0x01
+#define WHOIS_QUICK 0x02
+#define WHOIS_SPAM_ME 0x04
+
+#define CHOPSPAM ">>> Last update of WHOIS database:"
+
+#define ishost(h) (isalnum((unsigned char)h) || h == '.' || h == '-')
+
+#define SCAN(p, end, check) \
+ while ((p) < (end)) \
+ if (check) ++(p); \
+ else break
+
+static struct {
+ const char *suffix, *server;
+} whoiswhere[] = {
+ /* Various handles */
+ { "-ARIN", ANICHOST },
+ { "-NICAT", "at" QNICHOST_TAIL },
+ { "-NORID", "no" QNICHOST_TAIL },
+ { "-RIPE", RNICHOST },
+ /* Nominet's whois server doesn't return referrals to JANET */
+ { ".ac.uk", "ac.uk" QNICHOST_TAIL },
+ { ".gov.uk", "ac.uk" QNICHOST_TAIL },
+ { "", IANAHOST }, /* default */
+ { NULL, NULL } /* safety belt */
+};
+
+#define WHOIS_REFERRAL(s) { s, sizeof(s) - 1 }
+static struct {
+ const char *prefix;
+ size_t len;
+} whois_referral[] = {
+ WHOIS_REFERRAL("whois:"), /* IANA */
+ WHOIS_REFERRAL("Whois Server:"),
+ WHOIS_REFERRAL("Registrar WHOIS Server:"), /* corporatedomains.com */
+ WHOIS_REFERRAL("ReferralServer: whois://"), /* ARIN */
+ WHOIS_REFERRAL("descr: region. Please query"), /* AfriNIC */
+ { NULL, 0 }
+};
+
+/*
+ * We have a list of patterns for RIRs that assert ignorance rather than
+ * providing referrals. If that happens, we guess that ARIN will be more
+ * helpful. But, before following a referral to an RIR, we check if we have
+ * asked that RIR already, and if so we make another guess.
+ */
+static const char *actually_arin[] = {
+ "netname: ERX-NETBLOCK\n", /* APNIC */
+ "netname: NON-RIPE-NCC-MANAGED-ADDRESS-BLOCK\n",
+ NULL
+};
+
+static struct {
+ int loop;
+ const char *host;
+} try_rir[] = {
+ { 0, ANICHOST },
+ { 0, RNICHOST },
+ { 0, PNICHOST },
+ { 0, FNICHOST },
+ { 0, LNICHOST },
+ { 0, NULL }
+};
+
+static void
+reset_rir(void) {
+ int i;
+
+ for (i = 0; try_rir[i].host != NULL; i++)
+ try_rir[i].loop = 0;
+}
+
+static const char *port = DEFAULT_PORT;
+
+static const char *choose_server(char *);
+static struct addrinfo *gethostinfo(char const *host, int exitnoname);
+#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
+static void usage(void);
+static void whois(const char *, const char *, int);
+
+int
+main(int argc, char *argv[])
+{
+ const char *country, *host;
+ int ch, flags;
+
+#ifdef SOCKS
+ SOCKSinit(argv[0]);
+#endif
+
+ country = host = NULL;
+ flags = 0;
+ while ((ch = getopt(argc, argv, "aAbc:fgh:iIklmp:PQrRS")) != -1) {
+ switch (ch) {
+ case 'a':
+ host = ANICHOST;
+ break;
+ case 'A':
+ host = PNICHOST;
+ break;
+ case 'b':
+ host = ABUSEHOST;
+ break;
+ case 'c':
+ country = optarg;
+ break;
+ case 'f':
+ host = FNICHOST;
+ break;
+ case 'g':
+ host = GNICHOST;
+ break;
+ case 'h':
+ host = optarg;
+ break;
+ case 'i':
+ host = INICHOST;
+ break;
+ case 'I':
+ host = IANAHOST;
+ break;
+ case 'k':
+ host = KNICHOST;
+ break;
+ case 'l':
+ host = LNICHOST;
+ break;
+ case 'm':
+ host = MNICHOST;
+ break;
+ case 'p':
+ port = optarg;
+ break;
+ case 'P':
+ host = PDBHOST;
+ break;
+ case 'Q':
+ flags |= WHOIS_QUICK;
+ break;
+ case 'r':
+ host = RNICHOST;
+ break;
+ case 'R':
+ flags |= WHOIS_RECURSE;
+ break;
+ case 'S':
+ flags |= WHOIS_SPAM_ME;
+ break;
+ case '?':
+ default:
+ usage();
+ /* NOTREACHED */
+ }
+ }
+ argc -= optind;
+ argv += optind;
+
+ if (!argc || (country != NULL && host != NULL))
+ usage();
+
+ /*
+ * If no host or country is specified, rely on referrals from IANA.
+ */
+ if (host == NULL && country == NULL) {
+ if ((host = getenv("WHOIS_SERVER")) == NULL &&
+ (host = getenv("RA_SERVER")) == NULL) {
+ if (!(flags & WHOIS_QUICK))
+ flags |= WHOIS_RECURSE;
+ }
+ }
+ while (argc-- > 0) {
+ if (country != NULL) {
+ char *qnichost;
+ s_asprintf(&qnichost, "%s%s", country, QNICHOST_TAIL);
+ whois(*argv, qnichost, flags);
+ free(qnichost);
+ } else
+ whois(*argv, host != NULL ? host :
+ choose_server(*argv), flags);
+ reset_rir();
+ argv++;
+ }
+ exit(0);
+}
+
+static const char *
+choose_server(char *domain)
+{
+ size_t len = strlen(domain);
+ int i;
+
+ for (i = 0; whoiswhere[i].suffix != NULL; i++) {
+ size_t suffix_len = strlen(whoiswhere[i].suffix);
+ if (len > suffix_len &&
+ strcasecmp(domain + len - suffix_len,
+ whoiswhere[i].suffix) == 0)
+ return (whoiswhere[i].server);
+ }
+ errx(EX_SOFTWARE, "no default whois server");
+}
+
+static struct addrinfo *
+gethostinfo(char const *host, int exit_on_noname)
+{
+ struct addrinfo hints, *res;
+ int error;
+
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_flags = AI_CANONNAME;
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+ res = NULL;
+ error = getaddrinfo(host, port, &hints, &res);
+ if (error && (exit_on_noname || error != EAI_NONAME))
+ err(EX_NOHOST, "%s: %s", host, gai_strerror(error));
+ return (res);
+}
+
+/*
+ * 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);
+}
+
+static int
+connect_to_any_host(struct addrinfo *hostres)
+{
+ struct addrinfo *res;
+ nfds_t i, j;
+ size_t count;
+ struct pollfd *fds;
+ int timeout = 180, s = -1;
+
+ for (res = hostres, count = 0; res; res = res->ai_next)
+ count++;
+ fds = calloc(count, sizeof(*fds));
+ if (fds == NULL)
+ err(EX_OSERR, "calloc()");
+
+ /*
+ * Traverse the result list elements and make non-block
+ * connection attempts.
+ */
+ count = i = 0;
+ for (res = hostres; res != NULL; res = res->ai_next) {
+ s = socket(res->ai_family, res->ai_socktype | SOCK_NONBLOCK,
+ res->ai_protocol);
+ if (s < 0)
+ continue;
+#ifdef __APPLE__
+ int flags = fcntl(s, F_GETFL, 0);
+ if (flags < 0) {
+ close(s);
+ continue;
+ }
+ flags |= O_NONBLOCK;
+ if (fcntl(s, F_SETFL, flags) != 0) {
+ close(s);
+ continue;
+ }
+#endif
+ if (connect(s, res->ai_addr, res->ai_addrlen) < 0) {
+ if (errno == EINPROGRESS) {
+ /* Add the socket to poll list */
+ fds[i].fd = s;
+ fds[i].events = POLLERR | POLLHUP |
+ POLLIN | POLLOUT;
+ /*
+ * From here until a socket connects, the
+ * socket fd is owned by the fds[] poll array.
+ */
+ s = -1;
+ count++;
+ i++;
+ } else {
+ close(s);
+ s = -1;
+
+ /*
+ * Poll only if we have something to poll,
+ * otherwise just go ahead and try next
+ * address
+ */
+ if (count == 0)
+ continue;
+ }
+ } else
+ goto done;
+
+ /*
+ * If we are at the last address, poll until a connection is
+ * established or we failed all connection attempts.
+ */
+ if (res->ai_next == NULL)
+ timeout = INFTIM;
+
+ /*
+ * Poll the watched descriptors for successful connections:
+ * if we still have more untried resolved addresses, poll only
+ * once; otherwise, poll until all descriptors have errors,
+ * which will be considered as ETIMEDOUT later.
+ */
+ do {
+ int n;
+
+ n = poll(fds, i, timeout);
+ if (n == 0) {
+ /*
+ * No event reported in time. Try with a
+ * smaller timeout (but cap at 2-3ms)
+ * after a new host have been added.
+ */
+ if (timeout >= 3)
+ timeout >>= 1;
+
+ break;
+ } else if (n < 0) {
+ /*
+ * errno here can only be EINTR which we would
+ * want to clean up and bail out.
+ */
+ s = -1;
+ goto done;
+ }
+
+ /*
+ * Check for the event(s) we have seen.
+ */
+ for (j = 0; j < i; j++) {
+ if (fds[j].fd == -1 || fds[j].events == 0 ||
+ fds[j].revents == 0)
+ continue;
+ if (fds[j].revents & ~(POLLIN | POLLOUT)) {
+ close(fds[j].fd);
+ fds[j].fd = -1;
+ fds[j].events = 0;
+ count--;
+ continue;
+ } else if (fds[j].revents & (POLLIN | POLLOUT)) {
+ /* Connect succeeded. */
+ s = fds[j].fd;
+ fds[j].fd = -1;
+
+ goto done;
+ }
+
+ }
+ } while (timeout == INFTIM && count != 0);
+ }
+
+ /* All attempts were failed */
+ s = -1;
+ if (count == 0)
+ errno = ETIMEDOUT;
+
+done:
+ /* Close all watched fds except the succeeded one */
+ for (j = 0; j < i; j++)
+ if (fds[j].fd != -1)
+ close(fds[j].fd);
+ free(fds);
+ return (s);
+}
+
+static void
+whois(const char *query, const char *hostname, int flags)
+{
+ FILE *fp;
+ struct addrinfo *hostres;
+ char *buf, *host, *nhost, *p;
+ int comment, s, f;
+ size_t len, i;
+
+ hostres = gethostinfo(hostname, 1);
+ s = connect_to_any_host(hostres);
+ if (s == -1)
+ err(EX_OSERR, "connect()");
+
+ /* Restore default blocking behavior. */
+ if ((f = fcntl(s, F_GETFL)) == -1)
+ err(EX_OSERR, "fcntl()");
+ f &= ~O_NONBLOCK;
+ if (fcntl(s, F_SETFL, f) == -1)
+ err(EX_OSERR, "fcntl()");
+
+ fp = fdopen(s, "r+");
+ if (fp == NULL)
+ err(EX_OSERR, "fdopen()");
+
+ if (!(flags & WHOIS_SPAM_ME) &&
+ (strcasecmp(hostname, DENICHOST) == 0 ||
+ strcasecmp(hostname, "de" QNICHOST_TAIL) == 0)) {
+ const char *q;
+ int idn = 0;
+ for (q = query; *q != '\0'; q++)
+ if (!isascii(*q))
+ idn = 1;
+ fprintf(fp, "-T dn%s %s\r\n", idn ? "" : ",ace", query);
+ } else if (!(flags & WHOIS_SPAM_ME) &&
+ (strcasecmp(hostname, DKNICHOST) == 0 ||
+ strcasecmp(hostname, "dk" QNICHOST_TAIL) == 0))
+ fprintf(fp, "--show-handles %s\r\n", query);
+ else if ((flags & WHOIS_SPAM_ME) ||
+ strchr(query, ' ') != NULL)
+ fprintf(fp, "%s\r\n", query);
+ else if (strcasecmp(hostname, ANICHOST) == 0) {
+ if (strncasecmp(query, "AS", 2) == 0 &&
+ strspn(query+2, "0123456789") == strlen(query+2))
+ fprintf(fp, "+ a %s\r\n", query+2);
+ else
+ fprintf(fp, "+ %s\r\n", query);
+ } else if (strcasecmp(hostres->ai_canonname, VNICHOST) == 0)
+ fprintf(fp, "domain %s\r\n", query);
+ else
+ fprintf(fp, "%s\r\n", query);
+ fflush(fp);
+
+ comment = 0;
+ if (!(flags & WHOIS_SPAM_ME) &&
+ (strcasecmp(hostname, ANICHOST) == 0 ||
+ strcasecmp(hostname, RNICHOST) == 0)) {
+ comment = 2;
+ }
+
+ nhost = NULL;
+ while ((buf = fgetln(fp, &len)) != NULL) {
+ /* Nominet */
+ if (!(flags & WHOIS_SPAM_ME) &&
+ len == 5 && strncmp(buf, "-- \r\n", 5) == 0)
+ break;
+ /* RIRs */
+ if (comment == 1 && buf[0] == '#')
+ break;
+ else if (comment == 2) {
+ if (strchr("#%\r\n", buf[0]) != NULL)
+ continue;
+ else
+ comment = 1;
+ }
+
+ printf("%.*s", (int)len, buf);
+
+ if ((flags & WHOIS_RECURSE) && nhost == NULL) {
+ for (i = 0; whois_referral[i].prefix != NULL; i++) {
+ p = buf;
+ SCAN(p, buf+len, *p == ' ');
+ if (strncasecmp(p, whois_referral[i].prefix,
+ whois_referral[i].len) != 0)
+ continue;
+ p += whois_referral[i].len;
+ SCAN(p, buf+len, *p == ' ');
+ host = p;
+ SCAN(p, buf+len, ishost(*p));
+ if (p > host)
+ s_asprintf(&nhost, "%.*s",
+ (int)(p - host), host);
+ break;
+ }
+ for (i = 0; actually_arin[i] != NULL; i++) {
+ if (strncmp(buf, actually_arin[i], len) == 0) {
+ s_asprintf(&nhost, "%s", ANICHOST);
+ break;
+ }
+ }
+ }
+ /* Verisign etc. */
+ if (!(flags & WHOIS_SPAM_ME) &&
+ len >= sizeof(CHOPSPAM)-1 &&
+ (strncasecmp(buf, CHOPSPAM, sizeof(CHOPSPAM)-1) == 0 ||
+ strncasecmp(buf, CHOPSPAM+4, sizeof(CHOPSPAM)-5) == 0)) {
+ printf("\n");
+ break;
+ }
+ }
+ fclose(fp);
+ freeaddrinfo(hostres);
+
+ f = 0;
+ for (i = 0; try_rir[i].host != NULL; i++) {
+ /* Remember visits to RIRs */
+ if (try_rir[i].loop == 0 &&
+ strcasecmp(try_rir[i].host, hostname) == 0)
+ try_rir[i].loop = 1;
+ /* Do we need to find an alternative RIR? */
+ if (try_rir[i].loop != 0 && nhost != NULL &&
+ strcasecmp(try_rir[i].host, nhost) == 0) {
+ free(nhost);
+ nhost = NULL;
+ f = 1;
+ }
+ }
+ if (f) {
+ /* Find a replacement RIR */
+ for (i = 0; try_rir[i].host != NULL; i++) {
+ if (try_rir[i].loop == 0) {
+ s_asprintf(&nhost, "%s",
+ try_rir[i].host);
+ break;
+ }
+ }
+ }
+ if (nhost != NULL) {
+ /* Ignore self-referrals */
+ if (strcasecmp(hostname, nhost) != 0) {
+ printf("# %s\n\n", nhost);
+ whois(query, nhost, flags);
+ }
+ free(nhost);
+ }
+}
+
+static void
+usage(void)
+{
+ fprintf(stderr,
+ "usage: whois [-aAbfgiIklmPQrRS] [-c country-code | -h hostname] "
+ "[-p port] name ...\n");
+ exit(EX_USAGE);
+}
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