17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate * Copyright (c) 1988, 1993
37c478bd9Sstevel@tonic-gate * The Regents of the University of California. All rights reserved.
47c478bd9Sstevel@tonic-gate *
57c478bd9Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without
67c478bd9Sstevel@tonic-gate * modification, are permitted provided that the following conditions
77c478bd9Sstevel@tonic-gate * are met:
87c478bd9Sstevel@tonic-gate * 1. Redistributions of source code must retain the above copyright
97c478bd9Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer.
107c478bd9Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright
117c478bd9Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the
127c478bd9Sstevel@tonic-gate * documentation and/or other materials provided with the distribution.
137c478bd9Sstevel@tonic-gate * 3. All advertising materials mentioning features or use of this software
147c478bd9Sstevel@tonic-gate * must display the following acknowledgement:
157c478bd9Sstevel@tonic-gate * This product includes software developed by the University of
167c478bd9Sstevel@tonic-gate * California, Berkeley and its contributors.
177c478bd9Sstevel@tonic-gate * 4. Neither the name of the University nor the names of its contributors
187c478bd9Sstevel@tonic-gate * may be used to endorse or promote products derived from this software
197c478bd9Sstevel@tonic-gate * without specific prior written permission.
207c478bd9Sstevel@tonic-gate *
217c478bd9Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
227c478bd9Sstevel@tonic-gate * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
237c478bd9Sstevel@tonic-gate * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
247c478bd9Sstevel@tonic-gate * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
257c478bd9Sstevel@tonic-gate * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
267c478bd9Sstevel@tonic-gate * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
277c478bd9Sstevel@tonic-gate * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
287c478bd9Sstevel@tonic-gate * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
297c478bd9Sstevel@tonic-gate * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
307c478bd9Sstevel@tonic-gate * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
317c478bd9Sstevel@tonic-gate * SUCH DAMAGE.
327c478bd9Sstevel@tonic-gate *
33*220c5023Swyllys * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
347c478bd9Sstevel@tonic-gate * Use is subject to license terms.
357c478bd9Sstevel@tonic-gate */
367c478bd9Sstevel@tonic-gate
377c478bd9Sstevel@tonic-gate #ifndef lint
387c478bd9Sstevel@tonic-gate static char sccsid[] = "@(#)network.c 8.1 (Berkeley) 6/6/93";
397c478bd9Sstevel@tonic-gate #endif /* not lint */
407c478bd9Sstevel@tonic-gate
417c478bd9Sstevel@tonic-gate #include <sys/types.h>
427c478bd9Sstevel@tonic-gate #include <sys/socket.h>
437c478bd9Sstevel@tonic-gate #include <sys/time.h>
447c478bd9Sstevel@tonic-gate
457c478bd9Sstevel@tonic-gate #include <errno.h>
467c478bd9Sstevel@tonic-gate
477c478bd9Sstevel@tonic-gate #include <arpa/telnet.h>
487c478bd9Sstevel@tonic-gate
497c478bd9Sstevel@tonic-gate #include "ring.h"
507c478bd9Sstevel@tonic-gate
517c478bd9Sstevel@tonic-gate #include "defines.h"
527c478bd9Sstevel@tonic-gate #include "externs.h"
537c478bd9Sstevel@tonic-gate
547c478bd9Sstevel@tonic-gate Ring netoring;
557c478bd9Sstevel@tonic-gate Ring netiring;
56*220c5023Swyllys
57*220c5023Swyllys /*
58*220c5023Swyllys * Use large buffers to handle larger tickets when doing
59*220c5023Swyllys * Kerberos authentication. Microsoft generates large
60*220c5023Swyllys * tickets that exceed the buffer size which causes authentication
61*220c5023Swyllys * to fail.
62*220c5023Swyllys */
63*220c5023Swyllys static unsigned char netobuf[10*BUFSIZ];
64*220c5023Swyllys static unsigned char netibuf[10*BUFSIZ];
657c478bd9Sstevel@tonic-gate
667c478bd9Sstevel@tonic-gate /*
677c478bd9Sstevel@tonic-gate * Initialize internal network data structures.
687c478bd9Sstevel@tonic-gate */
697c478bd9Sstevel@tonic-gate
707c478bd9Sstevel@tonic-gate void
init_network()717c478bd9Sstevel@tonic-gate init_network()
727c478bd9Sstevel@tonic-gate {
737c478bd9Sstevel@tonic-gate if (ring_init(&netoring, netobuf, sizeof (netobuf)) != 1) {
747c478bd9Sstevel@tonic-gate exit(1);
757c478bd9Sstevel@tonic-gate }
767c478bd9Sstevel@tonic-gate if (ring_init(&netiring, netibuf, sizeof (netibuf)) != 1) {
777c478bd9Sstevel@tonic-gate exit(1);
787c478bd9Sstevel@tonic-gate }
797c478bd9Sstevel@tonic-gate NetTrace = stdout;
807c478bd9Sstevel@tonic-gate }
817c478bd9Sstevel@tonic-gate
827c478bd9Sstevel@tonic-gate
837c478bd9Sstevel@tonic-gate /*
847c478bd9Sstevel@tonic-gate * Check to see if any out-of-band data exists on a socket (for
857c478bd9Sstevel@tonic-gate * Telnet "synch" processing).
867c478bd9Sstevel@tonic-gate */
877c478bd9Sstevel@tonic-gate
887c478bd9Sstevel@tonic-gate int
stilloob()897c478bd9Sstevel@tonic-gate stilloob()
907c478bd9Sstevel@tonic-gate {
917c478bd9Sstevel@tonic-gate static struct timeval timeout = { 0 };
927c478bd9Sstevel@tonic-gate fd_set excepts;
937c478bd9Sstevel@tonic-gate int value;
947c478bd9Sstevel@tonic-gate
957c478bd9Sstevel@tonic-gate do {
967c478bd9Sstevel@tonic-gate FD_ZERO(&excepts);
977c478bd9Sstevel@tonic-gate FD_SET(net, &excepts);
987c478bd9Sstevel@tonic-gate value = select(net+1, NULL, NULL, &excepts, &timeout);
997c478bd9Sstevel@tonic-gate } while ((value == -1) && (errno == EINTR));
1007c478bd9Sstevel@tonic-gate
1017c478bd9Sstevel@tonic-gate if (value < 0) {
1027c478bd9Sstevel@tonic-gate perror("select");
1037c478bd9Sstevel@tonic-gate (void) quit();
1047c478bd9Sstevel@tonic-gate /* NOTREACHED */
1057c478bd9Sstevel@tonic-gate }
1067c478bd9Sstevel@tonic-gate if (FD_ISSET(net, &excepts)) {
1077c478bd9Sstevel@tonic-gate return (1);
1087c478bd9Sstevel@tonic-gate } else {
1097c478bd9Sstevel@tonic-gate return (0);
1107c478bd9Sstevel@tonic-gate }
1117c478bd9Sstevel@tonic-gate }
1127c478bd9Sstevel@tonic-gate
1137c478bd9Sstevel@tonic-gate
1147c478bd9Sstevel@tonic-gate /*
1157c478bd9Sstevel@tonic-gate * setneturg()
1167c478bd9Sstevel@tonic-gate *
1177c478bd9Sstevel@tonic-gate * Sets "neturg" to the current location.
1187c478bd9Sstevel@tonic-gate */
1197c478bd9Sstevel@tonic-gate
1207c478bd9Sstevel@tonic-gate void
setneturg()1217c478bd9Sstevel@tonic-gate setneturg()
1227c478bd9Sstevel@tonic-gate {
1237c478bd9Sstevel@tonic-gate ring_mark(&netoring);
1247c478bd9Sstevel@tonic-gate }
1257c478bd9Sstevel@tonic-gate
1267c478bd9Sstevel@tonic-gate
1277c478bd9Sstevel@tonic-gate /*
1287c478bd9Sstevel@tonic-gate * netflush
1297c478bd9Sstevel@tonic-gate * Send as much data as possible to the network,
1307c478bd9Sstevel@tonic-gate * handling requests for urgent data.
1317c478bd9Sstevel@tonic-gate *
1327c478bd9Sstevel@tonic-gate * The return value indicates whether we did any
1337c478bd9Sstevel@tonic-gate * useful work.
1347c478bd9Sstevel@tonic-gate */
1357c478bd9Sstevel@tonic-gate
1367c478bd9Sstevel@tonic-gate
1377c478bd9Sstevel@tonic-gate int
netflush()1387c478bd9Sstevel@tonic-gate netflush()
1397c478bd9Sstevel@tonic-gate {
1407c478bd9Sstevel@tonic-gate register int n, n1;
1417c478bd9Sstevel@tonic-gate
1427c478bd9Sstevel@tonic-gate if (encrypt_output)
1437c478bd9Sstevel@tonic-gate ring_encrypt(&netoring, encrypt_output);
1447c478bd9Sstevel@tonic-gate
1457c478bd9Sstevel@tonic-gate if ((n1 = n = ring_full_consecutive(&netoring)) > 0) {
1467c478bd9Sstevel@tonic-gate if (!ring_at_mark(&netoring)) {
1477c478bd9Sstevel@tonic-gate /* normal write */
1487c478bd9Sstevel@tonic-gate n = send(net, netoring.consume, n, 0);
1497c478bd9Sstevel@tonic-gate } else {
1507c478bd9Sstevel@tonic-gate /*
1517c478bd9Sstevel@tonic-gate * In 4.2(and 4.3) systems, there is some question about
1527c478bd9Sstevel@tonic-gate * what byte in a sendOOB operation is the "OOB" data.
1537c478bd9Sstevel@tonic-gate * To make ourselves compatible, we only send ONE byte
1547c478bd9Sstevel@tonic-gate * out of band, the one WE THINK should be OOB (though
1557c478bd9Sstevel@tonic-gate * we really have more the TCP philosophy of urgent data
1567c478bd9Sstevel@tonic-gate * rather than the Unix philosophy of OOB data).
1577c478bd9Sstevel@tonic-gate */
1587c478bd9Sstevel@tonic-gate n = send(net, netoring.consume, 1, MSG_OOB);
1597c478bd9Sstevel@tonic-gate }
1607c478bd9Sstevel@tonic-gate }
1617c478bd9Sstevel@tonic-gate if (n < 0) {
1627c478bd9Sstevel@tonic-gate if (errno != ENOBUFS && errno != EWOULDBLOCK) {
1637c478bd9Sstevel@tonic-gate setcommandmode();
1647c478bd9Sstevel@tonic-gate perror(hostname);
1657c478bd9Sstevel@tonic-gate ring_clear_mark(&netoring);
1667c478bd9Sstevel@tonic-gate longjmp(peerdied, -1);
1677c478bd9Sstevel@tonic-gate /*NOTREACHED*/
1687c478bd9Sstevel@tonic-gate }
1697c478bd9Sstevel@tonic-gate n = 0;
1707c478bd9Sstevel@tonic-gate }
1717c478bd9Sstevel@tonic-gate if (netdata && n) {
1727c478bd9Sstevel@tonic-gate Dump('>', netoring.consume, n);
1737c478bd9Sstevel@tonic-gate }
1747c478bd9Sstevel@tonic-gate if (n) {
1757c478bd9Sstevel@tonic-gate ring_consumed(&netoring, n);
1767c478bd9Sstevel@tonic-gate /*
1777c478bd9Sstevel@tonic-gate * If we sent all, and more to send, then recurse to pick
1787c478bd9Sstevel@tonic-gate * up the other half.
1797c478bd9Sstevel@tonic-gate */
1807c478bd9Sstevel@tonic-gate if ((n1 == n) && ring_full_consecutive(&netoring)) {
1817c478bd9Sstevel@tonic-gate (void) netflush();
1827c478bd9Sstevel@tonic-gate }
1837c478bd9Sstevel@tonic-gate return (1);
1847c478bd9Sstevel@tonic-gate } else {
1857c478bd9Sstevel@tonic-gate return (0);
1867c478bd9Sstevel@tonic-gate }
1877c478bd9Sstevel@tonic-gate }
188