17c478bd9Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
27c478bd9Sstevel@tonic-gate 
37c478bd9Sstevel@tonic-gate /*
47c478bd9Sstevel@tonic-gate  * Copyright (c) 1988, 1993
57c478bd9Sstevel@tonic-gate  *	The Regents of the University of California.  All rights reserved.
67c478bd9Sstevel@tonic-gate  *
77c478bd9Sstevel@tonic-gate  * Redistribution and use in source and binary forms, with or without
87c478bd9Sstevel@tonic-gate  * modification, are permitted provided that the following conditions
97c478bd9Sstevel@tonic-gate  * are met:
107c478bd9Sstevel@tonic-gate  * 1. Redistributions of source code must retain the above copyright
117c478bd9Sstevel@tonic-gate  *    notice, this list of conditions and the following disclaimer.
127c478bd9Sstevel@tonic-gate  * 2. Redistributions in binary form must reproduce the above copyright
137c478bd9Sstevel@tonic-gate  *    notice, this list of conditions and the following disclaimer in the
147c478bd9Sstevel@tonic-gate  *    documentation and/or other materials provided with the distribution.
157c478bd9Sstevel@tonic-gate  * 3. All advertising materials mentioning features or use of this software
167c478bd9Sstevel@tonic-gate  *    must display the following acknowledgement:
177c478bd9Sstevel@tonic-gate  *	This product includes software developed by the University of
187c478bd9Sstevel@tonic-gate  *	California, Berkeley and its contributors.
197c478bd9Sstevel@tonic-gate  * 4. Neither the name of the University nor the names of its contributors
207c478bd9Sstevel@tonic-gate  *    may be used to endorse or promote products derived from this software
217c478bd9Sstevel@tonic-gate  *    without specific prior written permission.
227c478bd9Sstevel@tonic-gate  *
237c478bd9Sstevel@tonic-gate  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
247c478bd9Sstevel@tonic-gate  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
257c478bd9Sstevel@tonic-gate  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
267c478bd9Sstevel@tonic-gate  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
277c478bd9Sstevel@tonic-gate  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
287c478bd9Sstevel@tonic-gate  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
297c478bd9Sstevel@tonic-gate  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
307c478bd9Sstevel@tonic-gate  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
317c478bd9Sstevel@tonic-gate  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
327c478bd9Sstevel@tonic-gate  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
337c478bd9Sstevel@tonic-gate  * SUCH DAMAGE.
347c478bd9Sstevel@tonic-gate  *
35*220c5023Swyllys  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
367c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
377c478bd9Sstevel@tonic-gate  */
387c478bd9Sstevel@tonic-gate 
397c478bd9Sstevel@tonic-gate #ifndef lint
407c478bd9Sstevel@tonic-gate static char sccsid[] = "@(#)network.c	8.1 (Berkeley) 6/6/93";
417c478bd9Sstevel@tonic-gate #endif /* not lint */
427c478bd9Sstevel@tonic-gate 
437c478bd9Sstevel@tonic-gate #include <sys/types.h>
447c478bd9Sstevel@tonic-gate #include <sys/socket.h>
457c478bd9Sstevel@tonic-gate #include <sys/time.h>
467c478bd9Sstevel@tonic-gate 
477c478bd9Sstevel@tonic-gate #include <errno.h>
487c478bd9Sstevel@tonic-gate 
497c478bd9Sstevel@tonic-gate #include <arpa/telnet.h>
507c478bd9Sstevel@tonic-gate 
517c478bd9Sstevel@tonic-gate #include "ring.h"
527c478bd9Sstevel@tonic-gate 
537c478bd9Sstevel@tonic-gate #include "defines.h"
547c478bd9Sstevel@tonic-gate #include "externs.h"
557c478bd9Sstevel@tonic-gate 
567c478bd9Sstevel@tonic-gate Ring	netoring;
577c478bd9Sstevel@tonic-gate Ring	netiring;
58*220c5023Swyllys 
59*220c5023Swyllys /*
60*220c5023Swyllys  * Use large buffers to handle larger tickets when doing
61*220c5023Swyllys  * Kerberos authentication.  Microsoft generates large
62*220c5023Swyllys  * tickets that exceed the buffer size which causes authentication
63*220c5023Swyllys  * to fail.
64*220c5023Swyllys  */
65*220c5023Swyllys static unsigned char netobuf[10*BUFSIZ];
66*220c5023Swyllys static unsigned char netibuf[10*BUFSIZ];
677c478bd9Sstevel@tonic-gate 
687c478bd9Sstevel@tonic-gate /*
697c478bd9Sstevel@tonic-gate  * Initialize internal network data structures.
707c478bd9Sstevel@tonic-gate  */
717c478bd9Sstevel@tonic-gate 
727c478bd9Sstevel@tonic-gate void
init_network()737c478bd9Sstevel@tonic-gate init_network()
747c478bd9Sstevel@tonic-gate {
757c478bd9Sstevel@tonic-gate 	if (ring_init(&netoring, netobuf, sizeof (netobuf)) != 1) {
767c478bd9Sstevel@tonic-gate 		exit(1);
777c478bd9Sstevel@tonic-gate 	}
787c478bd9Sstevel@tonic-gate 	if (ring_init(&netiring, netibuf, sizeof (netibuf)) != 1) {
797c478bd9Sstevel@tonic-gate 		exit(1);
807c478bd9Sstevel@tonic-gate 	}
817c478bd9Sstevel@tonic-gate 	NetTrace = stdout;
827c478bd9Sstevel@tonic-gate }
837c478bd9Sstevel@tonic-gate 
847c478bd9Sstevel@tonic-gate 
857c478bd9Sstevel@tonic-gate /*
867c478bd9Sstevel@tonic-gate  * Check to see if any out-of-band data exists on a socket (for
877c478bd9Sstevel@tonic-gate  * Telnet "synch" processing).
887c478bd9Sstevel@tonic-gate  */
897c478bd9Sstevel@tonic-gate 
907c478bd9Sstevel@tonic-gate int
stilloob()917c478bd9Sstevel@tonic-gate stilloob()
927c478bd9Sstevel@tonic-gate {
937c478bd9Sstevel@tonic-gate 	static struct timeval timeout = { 0 };
947c478bd9Sstevel@tonic-gate 	fd_set	excepts;
957c478bd9Sstevel@tonic-gate 	int value;
967c478bd9Sstevel@tonic-gate 
977c478bd9Sstevel@tonic-gate 	do {
987c478bd9Sstevel@tonic-gate 		FD_ZERO(&excepts);
997c478bd9Sstevel@tonic-gate 		FD_SET(net, &excepts);
1007c478bd9Sstevel@tonic-gate 		value = select(net+1, NULL, NULL, &excepts, &timeout);
1017c478bd9Sstevel@tonic-gate 	} while ((value == -1) && (errno == EINTR));
1027c478bd9Sstevel@tonic-gate 
1037c478bd9Sstevel@tonic-gate 	if (value < 0) {
1047c478bd9Sstevel@tonic-gate 		perror("select");
1057c478bd9Sstevel@tonic-gate 		(void) quit();
1067c478bd9Sstevel@tonic-gate 		/* NOTREACHED */
1077c478bd9Sstevel@tonic-gate 	}
1087c478bd9Sstevel@tonic-gate 	if (FD_ISSET(net, &excepts)) {
1097c478bd9Sstevel@tonic-gate 		return (1);
1107c478bd9Sstevel@tonic-gate 	} else {
1117c478bd9Sstevel@tonic-gate 		return (0);
1127c478bd9Sstevel@tonic-gate 	}
1137c478bd9Sstevel@tonic-gate }
1147c478bd9Sstevel@tonic-gate 
1157c478bd9Sstevel@tonic-gate 
1167c478bd9Sstevel@tonic-gate /*
1177c478bd9Sstevel@tonic-gate  *  setneturg()
1187c478bd9Sstevel@tonic-gate  *
1197c478bd9Sstevel@tonic-gate  *	Sets "neturg" to the current location.
1207c478bd9Sstevel@tonic-gate  */
1217c478bd9Sstevel@tonic-gate 
1227c478bd9Sstevel@tonic-gate void
setneturg()1237c478bd9Sstevel@tonic-gate setneturg()
1247c478bd9Sstevel@tonic-gate {
1257c478bd9Sstevel@tonic-gate 	ring_mark(&netoring);
1267c478bd9Sstevel@tonic-gate }
1277c478bd9Sstevel@tonic-gate 
1287c478bd9Sstevel@tonic-gate 
1297c478bd9Sstevel@tonic-gate /*
1307c478bd9Sstevel@tonic-gate  *  netflush
1317c478bd9Sstevel@tonic-gate  *		Send as much data as possible to the network,
1327c478bd9Sstevel@tonic-gate  *	handling requests for urgent data.
1337c478bd9Sstevel@tonic-gate  *
1347c478bd9Sstevel@tonic-gate  *		The return value indicates whether we did any
1357c478bd9Sstevel@tonic-gate  *	useful work.
1367c478bd9Sstevel@tonic-gate  */
1377c478bd9Sstevel@tonic-gate 
1387c478bd9Sstevel@tonic-gate 
1397c478bd9Sstevel@tonic-gate int
netflush()1407c478bd9Sstevel@tonic-gate netflush()
1417c478bd9Sstevel@tonic-gate {
1427c478bd9Sstevel@tonic-gate 	register int n, n1;
1437c478bd9Sstevel@tonic-gate 
1447c478bd9Sstevel@tonic-gate 	if (encrypt_output)
1457c478bd9Sstevel@tonic-gate 		ring_encrypt(&netoring, encrypt_output);
1467c478bd9Sstevel@tonic-gate 
1477c478bd9Sstevel@tonic-gate 	if ((n1 = n = ring_full_consecutive(&netoring)) > 0) {
1487c478bd9Sstevel@tonic-gate 		if (!ring_at_mark(&netoring)) {
1497c478bd9Sstevel@tonic-gate 			/* normal write */
1507c478bd9Sstevel@tonic-gate 			n = send(net, netoring.consume, n, 0);
1517c478bd9Sstevel@tonic-gate 		} else {
1527c478bd9Sstevel@tonic-gate 			/*
1537c478bd9Sstevel@tonic-gate 			 * In 4.2(and 4.3) systems, there is some question about
1547c478bd9Sstevel@tonic-gate 			 * what byte in a sendOOB operation is the "OOB" data.
1557c478bd9Sstevel@tonic-gate 			 * To make ourselves compatible, we only send ONE byte
1567c478bd9Sstevel@tonic-gate 			 * out of band, the one WE THINK should be OOB (though
1577c478bd9Sstevel@tonic-gate 			 * we really have more the TCP philosophy of urgent data
1587c478bd9Sstevel@tonic-gate 			 * rather than the Unix philosophy of OOB data).
1597c478bd9Sstevel@tonic-gate 			 */
1607c478bd9Sstevel@tonic-gate 			n = send(net, netoring.consume, 1, MSG_OOB);
1617c478bd9Sstevel@tonic-gate 		}
1627c478bd9Sstevel@tonic-gate 	}
1637c478bd9Sstevel@tonic-gate 	if (n < 0) {
1647c478bd9Sstevel@tonic-gate 		if (errno != ENOBUFS && errno != EWOULDBLOCK) {
1657c478bd9Sstevel@tonic-gate 			setcommandmode();
1667c478bd9Sstevel@tonic-gate 			perror(hostname);
1677c478bd9Sstevel@tonic-gate 			ring_clear_mark(&netoring);
1687c478bd9Sstevel@tonic-gate 			longjmp(peerdied, -1);
1697c478bd9Sstevel@tonic-gate 			/*NOTREACHED*/
1707c478bd9Sstevel@tonic-gate 		}
1717c478bd9Sstevel@tonic-gate 		n = 0;
1727c478bd9Sstevel@tonic-gate 	}
1737c478bd9Sstevel@tonic-gate 	if (netdata && n) {
1747c478bd9Sstevel@tonic-gate 		Dump('>', netoring.consume, n);
1757c478bd9Sstevel@tonic-gate 	}
1767c478bd9Sstevel@tonic-gate 	if (n) {
1777c478bd9Sstevel@tonic-gate 		ring_consumed(&netoring, n);
1787c478bd9Sstevel@tonic-gate 		/*
1797c478bd9Sstevel@tonic-gate 		 * If we sent all, and more to send, then recurse to pick
1807c478bd9Sstevel@tonic-gate 		 * up the other half.
1817c478bd9Sstevel@tonic-gate 		 */
1827c478bd9Sstevel@tonic-gate 		if ((n1 == n) && ring_full_consecutive(&netoring)) {
1837c478bd9Sstevel@tonic-gate 			(void) netflush();
1847c478bd9Sstevel@tonic-gate 		}
1857c478bd9Sstevel@tonic-gate 		return (1);
1867c478bd9Sstevel@tonic-gate 	} else {
1877c478bd9Sstevel@tonic-gate 		return (0);
1887c478bd9Sstevel@tonic-gate 	}
1897c478bd9Sstevel@tonic-gate }
190