17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate * CDDL HEADER START
37c478bd9Sstevel@tonic-gate *
47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
57c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
67c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
77c478bd9Sstevel@tonic-gate * with the License.
87c478bd9Sstevel@tonic-gate *
97c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
107c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
117c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
127c478bd9Sstevel@tonic-gate * and limitations under the License.
137c478bd9Sstevel@tonic-gate *
147c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
157c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
167c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
177c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
187c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
197c478bd9Sstevel@tonic-gate *
207c478bd9Sstevel@tonic-gate * CDDL HEADER END
21*d762223fSYuri Pankov *
227c478bd9Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
237c478bd9Sstevel@tonic-gate * Use is subject to license terms.
24*d762223fSYuri Pankov *
25*d762223fSYuri Pankov * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
267c478bd9Sstevel@tonic-gate */
277c478bd9Sstevel@tonic-gate
287c478bd9Sstevel@tonic-gate /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
297c478bd9Sstevel@tonic-gate /* All Rights Reserved */
307c478bd9Sstevel@tonic-gate
317c478bd9Sstevel@tonic-gate /*
327c478bd9Sstevel@tonic-gate * Portions of this source code were derived from Berkeley 4.3 BSD
337c478bd9Sstevel@tonic-gate * under license from the Regents of the University of California.
347c478bd9Sstevel@tonic-gate */
357c478bd9Sstevel@tonic-gate
367c478bd9Sstevel@tonic-gate /*
377c478bd9Sstevel@tonic-gate * XXX This routine should be changed to use
387c478bd9Sstevel@tonic-gate * ND_CHECK_RESERVED_PORT and ND_SET_RESERVED_PORT
397c478bd9Sstevel@tonic-gate * which can be invoked via netdir_options.
407c478bd9Sstevel@tonic-gate */
417c478bd9Sstevel@tonic-gate #include <stdio.h>
427c478bd9Sstevel@tonic-gate #include <rpc/rpc.h>
437c478bd9Sstevel@tonic-gate #include <netinet/in.h>
447c478bd9Sstevel@tonic-gate #include <sys/socket.h>
457c478bd9Sstevel@tonic-gate #include <netdb.h>
467c478bd9Sstevel@tonic-gate #include <errno.h>
477c478bd9Sstevel@tonic-gate #include <rpc/nettype.h>
487c478bd9Sstevel@tonic-gate #include <stropts.h>
497c478bd9Sstevel@tonic-gate #include <string.h>
507c478bd9Sstevel@tonic-gate #include <tiuser.h>
517c478bd9Sstevel@tonic-gate #include <unistd.h>
527c478bd9Sstevel@tonic-gate
537c478bd9Sstevel@tonic-gate #define STARTPORT 600
547c478bd9Sstevel@tonic-gate #define ENDPORT (IPPORT_RESERVED - 1)
557c478bd9Sstevel@tonic-gate #define NPORTS (ENDPORT - STARTPORT + 1)
567c478bd9Sstevel@tonic-gate
577c478bd9Sstevel@tonic-gate /*
587c478bd9Sstevel@tonic-gate * The argument is a client handle for a UDP connection.
597c478bd9Sstevel@tonic-gate * Unbind its transport endpoint from the existing port
607c478bd9Sstevel@tonic-gate * and rebind it to a reserved port.
617c478bd9Sstevel@tonic-gate * On failure, the client handle can be unbound even if it
627c478bd9Sstevel@tonic-gate * was previously bound. Callers should destroy the client
637c478bd9Sstevel@tonic-gate * handle after a failure.
647c478bd9Sstevel@tonic-gate */
657c478bd9Sstevel@tonic-gate int
__clnt_bindresvport(cl)667c478bd9Sstevel@tonic-gate __clnt_bindresvport(cl)
677c478bd9Sstevel@tonic-gate CLIENT *cl;
687c478bd9Sstevel@tonic-gate {
697c478bd9Sstevel@tonic-gate int fd;
707c478bd9Sstevel@tonic-gate int res;
717c478bd9Sstevel@tonic-gate short port;
727c478bd9Sstevel@tonic-gate struct sockaddr_in *sin;
737c478bd9Sstevel@tonic-gate struct sockaddr_in6 *sin6;
747c478bd9Sstevel@tonic-gate extern int errno;
757c478bd9Sstevel@tonic-gate /* extern int t_errno; */
767c478bd9Sstevel@tonic-gate struct t_bind *tbind, *tres;
777c478bd9Sstevel@tonic-gate int i;
787c478bd9Sstevel@tonic-gate bool_t ipv6_fl = FALSE;
797c478bd9Sstevel@tonic-gate struct netconfig *nconf;
807c478bd9Sstevel@tonic-gate
817c478bd9Sstevel@tonic-gate /* make sure it's a UDP connection */
827c478bd9Sstevel@tonic-gate nconf = getnetconfigent(cl->cl_netid);
837c478bd9Sstevel@tonic-gate if (nconf == NULL)
847c478bd9Sstevel@tonic-gate return (-1);
857c478bd9Sstevel@tonic-gate if ((nconf->nc_semantics != NC_TPI_CLTS) ||
867c478bd9Sstevel@tonic-gate (strcmp(nconf->nc_protofmly, NC_INET) &&
87*d762223fSYuri Pankov strcmp(nconf->nc_protofmly, NC_INET6)) ||
887c478bd9Sstevel@tonic-gate strcmp(nconf->nc_proto, NC_UDP)) {
897c478bd9Sstevel@tonic-gate freenetconfigent(nconf);
907c478bd9Sstevel@tonic-gate return (0); /* not udp - don't need resv port */
917c478bd9Sstevel@tonic-gate }
927c478bd9Sstevel@tonic-gate if (strcmp(nconf->nc_protofmly, NC_INET6) == 0)
937c478bd9Sstevel@tonic-gate ipv6_fl = TRUE;
947c478bd9Sstevel@tonic-gate freenetconfigent(nconf);
957c478bd9Sstevel@tonic-gate
967c478bd9Sstevel@tonic-gate if (!clnt_control(cl, CLGET_FD, (char *)&fd)) {
977c478bd9Sstevel@tonic-gate return (-1);
987c478bd9Sstevel@tonic-gate }
997c478bd9Sstevel@tonic-gate
1007c478bd9Sstevel@tonic-gate /* If fd is already bound - unbind it */
1017c478bd9Sstevel@tonic-gate if (t_getstate(fd) != T_UNBND) {
1027c478bd9Sstevel@tonic-gate while ((t_unbind(fd) < 0) && (t_errno == TLOOK)) {
1037c478bd9Sstevel@tonic-gate /*
1047c478bd9Sstevel@tonic-gate * If there is a message queued to this descriptor,
1057c478bd9Sstevel@tonic-gate * remove it.
1067c478bd9Sstevel@tonic-gate */
1077c478bd9Sstevel@tonic-gate struct strbuf ctl[1], data[1];
1087c478bd9Sstevel@tonic-gate char ctlbuf[sizeof (union T_primitives) + 32];
1097c478bd9Sstevel@tonic-gate char databuf[256];
1107c478bd9Sstevel@tonic-gate int flags;
1117c478bd9Sstevel@tonic-gate
1127c478bd9Sstevel@tonic-gate ctl->maxlen = sizeof (ctlbuf);
1137c478bd9Sstevel@tonic-gate ctl->buf = ctlbuf;
1147c478bd9Sstevel@tonic-gate data->maxlen = sizeof (databuf);
1157c478bd9Sstevel@tonic-gate data->buf = databuf;
1167c478bd9Sstevel@tonic-gate flags = 0;
1177c478bd9Sstevel@tonic-gate if (getmsg(fd, ctl, data, &flags) < 0)
1187c478bd9Sstevel@tonic-gate return (-1);
1197c478bd9Sstevel@tonic-gate
1207c478bd9Sstevel@tonic-gate }
1217c478bd9Sstevel@tonic-gate if (t_getstate(fd) != T_UNBND)
1227c478bd9Sstevel@tonic-gate return (-1);
1237c478bd9Sstevel@tonic-gate }
1247c478bd9Sstevel@tonic-gate
1257c478bd9Sstevel@tonic-gate tbind = (struct t_bind *)t_alloc(fd, T_BIND, T_ADDR);
1267c478bd9Sstevel@tonic-gate if (tbind == NULL) {
1277c478bd9Sstevel@tonic-gate if (t_errno == TBADF)
1287c478bd9Sstevel@tonic-gate errno = EBADF;
1297c478bd9Sstevel@tonic-gate return (-1);
1307c478bd9Sstevel@tonic-gate }
1317c478bd9Sstevel@tonic-gate tres = (struct t_bind *)t_alloc(fd, T_BIND, T_ADDR);
1327c478bd9Sstevel@tonic-gate if (tres == NULL) {
1337c478bd9Sstevel@tonic-gate (void) t_free((char *)tbind, T_BIND);
1347c478bd9Sstevel@tonic-gate return (-1);
1357c478bd9Sstevel@tonic-gate }
1367c478bd9Sstevel@tonic-gate
1377c478bd9Sstevel@tonic-gate (void) memset((char *)tbind->addr.buf, 0, tbind->addr.len);
1387c478bd9Sstevel@tonic-gate /* warning: this sockaddr_in is truncated to 8 bytes */
1397c478bd9Sstevel@tonic-gate
1407c478bd9Sstevel@tonic-gate if (ipv6_fl == TRUE) {
1417c478bd9Sstevel@tonic-gate sin6 = (struct sockaddr_in6 *)tbind->addr.buf;
1427c478bd9Sstevel@tonic-gate sin6->sin6_family = AF_INET6;
1437c478bd9Sstevel@tonic-gate } else {
1447c478bd9Sstevel@tonic-gate sin = (struct sockaddr_in *)tbind->addr.buf;
1457c478bd9Sstevel@tonic-gate sin->sin_family = AF_INET;
1467c478bd9Sstevel@tonic-gate }
1477c478bd9Sstevel@tonic-gate
1487c478bd9Sstevel@tonic-gate tbind->qlen = 0;
1497c478bd9Sstevel@tonic-gate tbind->addr.len = tbind->addr.maxlen;
1507c478bd9Sstevel@tonic-gate
1517c478bd9Sstevel@tonic-gate /*
1527c478bd9Sstevel@tonic-gate * Need to find a reserved port in the interval
1537c478bd9Sstevel@tonic-gate * STARTPORT - ENDPORT. Choose a random starting
1547c478bd9Sstevel@tonic-gate * place in the interval based on the process pid
1557c478bd9Sstevel@tonic-gate * and sequentially search the ports for one
1567c478bd9Sstevel@tonic-gate * that is available.
1577c478bd9Sstevel@tonic-gate */
1587c478bd9Sstevel@tonic-gate port = (getpid() % NPORTS) + STARTPORT;
1597c478bd9Sstevel@tonic-gate
1607c478bd9Sstevel@tonic-gate for (i = 0; i < NPORTS; i++) {
161*d762223fSYuri Pankov if (ipv6_fl == TRUE)
162*d762223fSYuri Pankov sin6->sin6_port = htons(port++);
163*d762223fSYuri Pankov else
164*d762223fSYuri Pankov sin->sin_port = htons(port++);
1657c478bd9Sstevel@tonic-gate if (port > ENDPORT)
1667c478bd9Sstevel@tonic-gate port = STARTPORT;
1677c478bd9Sstevel@tonic-gate /*
1687c478bd9Sstevel@tonic-gate * Try to bind to the requested address. If
1697c478bd9Sstevel@tonic-gate * the call to t_bind succeeds, then we need
1707c478bd9Sstevel@tonic-gate * to make sure that the address that we bound
1717c478bd9Sstevel@tonic-gate * to was the address that we requested. If it
1727c478bd9Sstevel@tonic-gate * was, then we are done. If not, we fake an
1737c478bd9Sstevel@tonic-gate * EADDRINUSE error by setting res, t_errno,
1747c478bd9Sstevel@tonic-gate * and errno to indicate that a bind failure
1757c478bd9Sstevel@tonic-gate * occurred. Otherwise, if the t_bind call
1767c478bd9Sstevel@tonic-gate * failed, we check to see whether it makes
1777c478bd9Sstevel@tonic-gate * sense to continue trying to t_bind requests.
1787c478bd9Sstevel@tonic-gate */
1797c478bd9Sstevel@tonic-gate res = t_bind(fd, tbind, tres);
1807c478bd9Sstevel@tonic-gate if (res == 0) {
1817c478bd9Sstevel@tonic-gate if (memcmp(tbind->addr.buf, tres->addr.buf,
1827c478bd9Sstevel@tonic-gate (int)tres->addr.len) == 0)
1837c478bd9Sstevel@tonic-gate break;
1847c478bd9Sstevel@tonic-gate (void) t_unbind(fd);
1857c478bd9Sstevel@tonic-gate res = -1;
1867c478bd9Sstevel@tonic-gate t_errno = TSYSERR;
1877c478bd9Sstevel@tonic-gate errno = EADDRINUSE;
1887c478bd9Sstevel@tonic-gate } else if (t_errno != TSYSERR || errno != EADDRINUSE) {
1897c478bd9Sstevel@tonic-gate if (t_errno == TACCES)
1907c478bd9Sstevel@tonic-gate errno = EACCES;
1917c478bd9Sstevel@tonic-gate break;
1927c478bd9Sstevel@tonic-gate }
1937c478bd9Sstevel@tonic-gate }
1947c478bd9Sstevel@tonic-gate
1957c478bd9Sstevel@tonic-gate (void) t_free((char *)tbind, T_BIND);
1967c478bd9Sstevel@tonic-gate (void) t_free((char *)tres, T_BIND);
1977c478bd9Sstevel@tonic-gate return (res);
1987c478bd9Sstevel@tonic-gate }
199