xref: /freebsd/usr.bin/systat/netstat.c (revision 884a2a699669ec61e2366e3e358342dbc94be24a) 
1 /*-
2  * Copyright (c) 1980, 1992, 1993
3  *	The Regents of the University of California.  All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 4. Neither the name of the University nor the names of its contributors
14  *    may be used to endorse or promote products derived from this software
15  *    without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  */
29 
30 #include <sys/cdefs.h>
31 
32 __FBSDID("$FreeBSD$");
33 
34 #ifdef lint
35 static const char sccsid[] = "@(#)netstat.c	8.1 (Berkeley) 6/6/93";
36 #endif
37 
38 /*
39  * netstat
40  */
41 #include <sys/param.h>
42 #include <sys/queue.h>
43 #include <sys/socket.h>
44 #include <sys/socketvar.h>
45 #include <sys/protosw.h>
46 
47 #include <netinet/in.h>
48 #include <arpa/inet.h>
49 #include <net/route.h>
50 #include <netinet/in_systm.h>
51 #include <netinet/ip.h>
52 #ifdef INET6
53 #include <netinet/ip6.h>
54 #endif
55 #include <netinet/in_pcb.h>
56 #include <netinet/ip_icmp.h>
57 #include <netinet/icmp_var.h>
58 #include <netinet/ip_var.h>
59 #include <netinet/tcp.h>
60 #include <netinet/tcpip.h>
61 #include <netinet/tcp_seq.h>
62 #include <netinet/tcp_var.h>
63 #define TCPSTATES
64 #include <netinet/tcp_fsm.h>
65 #include <netinet/tcp_timer.h>
66 #include <netinet/tcp_var.h>
67 #include <netinet/tcp_debug.h>
68 #include <netinet/udp.h>
69 #include <netinet/udp_var.h>
70 
71 #include <netdb.h>
72 #include <nlist.h>
73 #include <paths.h>
74 #include <stdlib.h>
75 #include <string.h>
76 
77 #include "systat.h"
78 #include "extern.h"
79 
80 static struct netinfo *enter(struct inpcb *, int, const char *);
81 static void enter_kvm(struct inpcb *, struct socket *, int, const char *);
82 static void enter_sysctl(struct inpcb *, struct xsocket *, int, const char *);
83 static void fetchnetstat_kvm(void);
84 static void fetchnetstat_sysctl(void);
85 static char *inetname(struct sockaddr *);
86 static void inetprint(struct sockaddr *, const char *);
87 
88 #define	streq(a,b)	(strcmp(a,b)==0)
89 #define	YMAX(w)		((w)->_maxy-1)
90 
91 WINDOW *
92 opennetstat(void)
93 {
94 	sethostent(1);
95 	setnetent(1);
96 	return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0));
97 }
98 
99 struct netinfo {
100 	TAILQ_ENTRY(netinfo) chain;
101 	short	ni_line;		/* line on screen */
102 	short	ni_seen;		/* 0 when not present in list */
103 	short	ni_flags;
104 #define	NIF_LACHG	0x1		/* local address changed */
105 #define	NIF_FACHG	0x2		/* foreign address changed */
106 	short	ni_state;		/* tcp state */
107 	const char	*ni_proto;		/* protocol */
108 	struct sockaddr_storage ni_lsa;	/* local address */
109 	struct sockaddr_storage	ni_fsa;	/* foreign address */
110 	u_int	ni_rcvcc;		/* rcv buffer character count */
111 	u_int	ni_sndcc;		/* snd buffer character count */
112 };
113 
114 TAILQ_HEAD(netinfohead, netinfo) netcb = TAILQ_HEAD_INITIALIZER(netcb);
115 
116 static	int aflag = 0;
117 static	int nflag = 0;
118 static	int lastrow = 1;
119 
120 void
121 closenetstat(WINDOW *w)
122 {
123 	struct netinfo *p;
124 
125 	endhostent();
126 	endnetent();
127 	TAILQ_FOREACH(p, &netcb, chain) {
128 		if (p->ni_line != -1)
129 			lastrow--;
130 		p->ni_line = -1;
131 	}
132         if (w != NULL) {
133 		wclear(w);
134 		wrefresh(w);
135 		delwin(w);
136 	}
137 }
138 
139 static const char *miblist[] = {
140 	"net.inet.tcp.pcblist",
141 	"net.inet.udp.pcblist"
142 };
143 
144 static char tcb[] = "tcb", udb[] = "udb";
145 
146 struct nlist namelist[] = {
147 #define	X_TCB	0
148 	{ .n_name = tcb },
149 #define	X_UDB	1
150 	{ .n_name = udb },
151 	{ .n_name = NULL },
152 };
153 
154 int
155 initnetstat(void)
156 {
157 	protos = TCP|UDP;
158 	return(1);
159 }
160 
161 void
162 fetchnetstat(void)
163 {
164 	if (use_kvm)
165 		fetchnetstat_kvm();
166 	else
167 		fetchnetstat_sysctl();
168 }
169 
170 static void
171 fetchnetstat_kvm(void)
172 {
173 	struct inpcb *next;
174 	struct netinfo *p;
175 	struct inpcbhead head;
176 	struct inpcb inpcb;
177 	struct socket sockb;
178 	struct tcpcb tcpcb;
179 	void *off;
180 	int istcp;
181 
182 	if (namelist[X_TCB].n_value == 0)
183 		return;
184 	TAILQ_FOREACH(p, &netcb, chain)
185 		p->ni_seen = 0;
186 	if (protos&TCP) {
187 		off = NPTR(X_TCB);
188 		istcp = 1;
189 	}
190 	else if (protos&UDP) {
191 		off = NPTR(X_UDB);
192 		istcp = 0;
193 	}
194 	else {
195 		error("No protocols to display");
196 		return;
197 	}
198 again:
199 	KREAD(off, &head, sizeof (struct inpcbhead));
200 	LIST_FOREACH(next, &head, inp_list) {
201 		KREAD(next, &inpcb, sizeof (inpcb));
202 		next = &inpcb;
203 		if (!aflag) {
204 			if (inpcb.inp_vflag & INP_IPV4) {
205 				if (inet_lnaof(inpcb.inp_laddr) == INADDR_ANY)
206 					continue;
207 			}
208 #ifdef INET6
209 			else if (inpcb.inp_vflag & INP_IPV6) {
210 				if (memcmp(&inpcb.in6p_laddr,
211 				    &in6addr_any, sizeof(in6addr_any)) == 0)
212 					continue;
213 			}
214 #endif
215 		}
216 		if (nhosts && !checkhost(&inpcb))
217 			continue;
218 		if (nports && !checkport(&inpcb))
219 			continue;
220 		if (istcp) {
221 			if (inpcb.inp_flags & INP_TIMEWAIT) {
222 				bzero(&sockb, sizeof(sockb));
223 				enter_kvm(&inpcb, &sockb, TCPS_TIME_WAIT,
224 					 "tcp");
225 			} else {
226 				KREAD(inpcb.inp_socket, &sockb,
227 					sizeof (sockb));
228 				KREAD(inpcb.inp_ppcb, &tcpcb, sizeof (tcpcb));
229 				enter_kvm(&inpcb, &sockb, tcpcb.t_state,
230 					"tcp");
231 			}
232 		} else
233 			enter_kvm(&inpcb, &sockb, 0, "udp");
234 	}
235 	if (istcp && (protos&UDP)) {
236 		istcp = 0;
237 		off = NPTR(X_UDB);
238 		goto again;
239 	}
240 }
241 
242 static void
243 fetchnetstat_sysctl(void)
244 {
245 	struct netinfo *p;
246 	int idx;
247 	struct xinpgen *inpg;
248 	char *cur, *end;
249 	struct inpcb *inpcb;
250 	struct xinpcb *xip = NULL;
251 	struct xtcpcb *xtp = NULL;
252 	int plen;
253 	size_t lsz;
254 
255 	TAILQ_FOREACH(p, &netcb, chain)
256 		p->ni_seen = 0;
257 	if (protos&TCP) {
258 		idx = 0;
259 	} else if (protos&UDP) {
260 		idx = 1;
261 	} else {
262 		error("No protocols to display");
263 		return;
264 	}
265 
266 	for (;idx < 2; idx++) {
267 		if (idx == 1 && !(protos&UDP))
268 			break;
269 		inpg = (struct xinpgen *)sysctl_dynread(miblist[idx], &lsz);
270 		if (inpg == NULL) {
271 			error("sysctl(%s...) failed", miblist[idx]);
272 			continue;
273 		}
274 		/*
275 		 * We currently do no require a consistent pcb list.
276 		 * Try to be robust in case of struct size changes
277 		 */
278 		cur = ((char *)inpg) + inpg->xig_len;
279 		/* There is also a trailing struct xinpgen */
280 		end = ((char *)inpg) + lsz - inpg->xig_len;
281 		if (end <= cur) {
282 			free(inpg);
283 			continue;
284 		}
285 		if (idx == 0) { /* TCP */
286 			xtp = (struct xtcpcb *)cur;
287 			plen = xtp->xt_len;
288 		} else {
289 			xip = (struct xinpcb *)cur;
290 			plen = xip->xi_len;
291 		}
292 		while (cur + plen <= end) {
293 			if (idx == 0) { /* TCP */
294 				xtp = (struct xtcpcb *)cur;
295 				inpcb = &xtp->xt_inp;
296 			} else {
297 				xip = (struct xinpcb *)cur;
298 				inpcb = &xip->xi_inp;
299 			}
300 			cur += plen;
301 
302 			if (!aflag) {
303 				if (inpcb->inp_vflag & INP_IPV4) {
304 					if (inet_lnaof(inpcb->inp_laddr) ==
305 					    INADDR_ANY)
306 						continue;
307 				}
308 #ifdef INET6
309 				else if (inpcb->inp_vflag & INP_IPV6) {
310 					if (memcmp(&inpcb->in6p_laddr,
311 					    &in6addr_any, sizeof(in6addr_any))
312 					    == 0)
313 						continue;
314 				}
315 #endif
316 			}
317 			if (nhosts && !checkhost(inpcb))
318 				continue;
319 			if (nports && !checkport(inpcb))
320 				continue;
321 			if (idx == 0)	/* TCP */
322 				enter_sysctl(inpcb, &xtp->xt_socket,
323 				    xtp->xt_tp.t_state, "tcp");
324 			else		/* UDP */
325 				enter_sysctl(inpcb, &xip->xi_socket, 0, "udp");
326 		}
327 		free(inpg);
328 	}
329 }
330 
331 static void
332 enter_kvm(struct inpcb *inp, struct socket *so, int state, const char *proto)
333 {
334 	struct netinfo *p;
335 
336 	if ((p = enter(inp, state, proto)) != NULL) {
337 		p->ni_rcvcc = so->so_rcv.sb_cc;
338 		p->ni_sndcc = so->so_snd.sb_cc;
339 	}
340 }
341 
342 static void
343 enter_sysctl(struct inpcb *inp, struct xsocket *so, int state, const char *proto)
344 {
345 	struct netinfo *p;
346 
347 	if ((p = enter(inp, state, proto)) != NULL) {
348 		p->ni_rcvcc = so->so_rcv.sb_cc;
349 		p->ni_sndcc = so->so_snd.sb_cc;
350 	}
351 }
352 
353 
354 static struct netinfo *
355 enter(struct inpcb *inp, int state, const char *proto)
356 {
357 	struct netinfo *p;
358 	struct sockaddr_storage lsa, fsa;
359 	struct sockaddr_in *sa4;
360 #ifdef INET6
361 	struct sockaddr_in6 *sa6;
362 #endif
363 
364 	memset(&lsa, 0, sizeof(lsa));
365 	memset(&fsa, 0, sizeof(fsa));
366 	if (inp->inp_vflag & INP_IPV4) {
367 		sa4 = (struct sockaddr_in *)&lsa;
368 		sa4->sin_addr = inp->inp_laddr;
369 		sa4->sin_port = inp->inp_lport;
370 		sa4->sin_family = AF_INET;
371 		sa4->sin_len = sizeof(struct sockaddr_in);
372 
373 		sa4 = (struct sockaddr_in *)&fsa;
374 		sa4->sin_addr = inp->inp_faddr;
375 		sa4->sin_port = inp->inp_fport;
376 		sa4->sin_family = AF_INET;
377 		sa4->sin_len = sizeof(struct sockaddr_in);
378 	}
379 #ifdef INET6
380 	else if (inp->inp_vflag & INP_IPV6) {
381 		sa6 = (struct sockaddr_in6 *)&lsa;
382 		memcpy(&sa6->sin6_addr, &inp->in6p_laddr,
383 		    sizeof(struct in6_addr));
384 		sa6->sin6_port = inp->inp_lport;
385 		sa6->sin6_family = AF_INET6;
386 		sa6->sin6_len = sizeof(struct sockaddr_in6);
387 
388 		sa6 = (struct sockaddr_in6 *)&fsa;
389 		memcpy(&sa6->sin6_addr, &inp->in6p_faddr,
390 		    sizeof(struct in6_addr));
391 		sa6->sin6_port = inp->inp_fport;
392 		sa6->sin6_family = AF_INET6;
393 		sa6->sin6_len = sizeof(struct sockaddr_in6);
394 	}
395 #endif
396 	else
397 		return NULL;
398 
399 	/*
400 	 * Only take exact matches, any sockets with
401 	 * previously unbound addresses will be deleted
402 	 * below in the display routine because they
403 	 * will appear as ``not seen'' in the kernel
404 	 * data structures.
405 	 */
406 	TAILQ_FOREACH(p, &netcb, chain) {
407 		if (!streq(proto, p->ni_proto))
408 			continue;
409 		if (p->ni_lsa.ss_family != lsa.ss_family ||
410 		    memcmp(&p->ni_lsa, &lsa, lsa.ss_len) != 0)
411 			continue;
412 		if (p->ni_fsa.ss_family == fsa.ss_family &&
413 		    memcmp(&p->ni_fsa, &fsa, fsa.ss_len) == 0)
414 			break;
415 	}
416 	if (p == NULL) {
417 		if ((p = malloc(sizeof(*p))) == NULL) {
418 			error("Out of memory");
419 			return NULL;
420 		}
421 		TAILQ_INSERT_HEAD(&netcb, p, chain);
422 		p->ni_line = -1;
423 		memcpy(&p->ni_lsa, &lsa, lsa.ss_len);
424 		memcpy(&p->ni_fsa, &fsa, fsa.ss_len);
425 		p->ni_proto = strdup(proto);
426 		p->ni_flags = NIF_LACHG|NIF_FACHG;
427 	}
428 	p->ni_state = state;
429 	p->ni_seen = 1;
430 	return p;
431 }
432 
433 /* column locations */
434 #define	LADDR	0
435 #define	FADDR	LADDR+23
436 #define	PROTO	FADDR+23
437 #define	RCVCC	PROTO+6
438 #define	SNDCC	RCVCC+7
439 #define	STATE	SNDCC+7
440 
441 
442 void
443 labelnetstat(void)
444 {
445 	if (use_kvm && namelist[X_TCB].n_type == 0)
446 		return;
447 	wmove(wnd, 0, 0); wclrtobot(wnd);
448 	mvwaddstr(wnd, 0, LADDR, "Local Address");
449 	mvwaddstr(wnd, 0, FADDR, "Foreign Address");
450 	mvwaddstr(wnd, 0, PROTO, "Proto");
451 	mvwaddstr(wnd, 0, RCVCC, "Recv-Q");
452 	mvwaddstr(wnd, 0, SNDCC, "Send-Q");
453 	mvwaddstr(wnd, 0, STATE, "(state)");
454 }
455 
456 void
457 shownetstat(void)
458 {
459 	struct netinfo *p, *q;
460 	char proto[6];
461 	const char *family = "";
462 
463 	/*
464 	 * First, delete any connections that have gone
465 	 * away and adjust the position of connections
466 	 * below to reflect the deleted line.
467 	 */
468 	p = TAILQ_FIRST(&netcb);
469 	while (p != NULL) {
470 		if (p->ni_line == -1 || p->ni_seen) {
471 			p = TAILQ_NEXT(p, chain);
472 			continue;
473 		}
474 		wmove(wnd, p->ni_line, 0); wdeleteln(wnd);
475 		TAILQ_FOREACH(q, &netcb, chain)
476 			if (q != p && q->ni_line > p->ni_line) {
477 				q->ni_line--;
478 				/* this shouldn't be necessary */
479 				q->ni_flags |= NIF_LACHG|NIF_FACHG;
480 			}
481 		lastrow--;
482 		q = TAILQ_NEXT(p, chain);
483 		TAILQ_REMOVE(&netcb, p, chain);
484 		free(p);
485 		p = q;
486 	}
487 	/*
488 	 * Update existing connections and add new ones.
489 	 */
490 	TAILQ_FOREACH(p, &netcb, chain) {
491 		if (p->ni_line == -1) {
492 			/*
493 			 * Add a new entry if possible.
494 			 */
495 			if (lastrow > YMAX(wnd))
496 				continue;
497 			p->ni_line = lastrow++;
498 			p->ni_flags |= NIF_LACHG|NIF_FACHG;
499 		}
500 		if (p->ni_flags & NIF_LACHG) {
501 			wmove(wnd, p->ni_line, LADDR);
502 			inetprint((struct sockaddr *)&p->ni_lsa, p->ni_proto);
503 			p->ni_flags &= ~NIF_LACHG;
504 		}
505 		if (p->ni_flags & NIF_FACHG) {
506 			wmove(wnd, p->ni_line, FADDR);
507 			inetprint((struct sockaddr *)&p->ni_fsa, p->ni_proto);
508 			p->ni_flags &= ~NIF_FACHG;
509 		}
510 #ifdef INET6
511 		family = (p->ni_lsa.ss_family == AF_INET) ? "4" : "6";
512 #endif
513 		snprintf(proto, sizeof(proto), "%s%s", p->ni_proto, family);
514 		mvwaddstr(wnd, p->ni_line, PROTO, proto);
515 		mvwprintw(wnd, p->ni_line, RCVCC, "%6u", p->ni_rcvcc);
516 		mvwprintw(wnd, p->ni_line, SNDCC, "%6u", p->ni_sndcc);
517 		if (streq(p->ni_proto, "tcp")) {
518 			if (p->ni_state < 0 || p->ni_state >= TCP_NSTATES)
519 				mvwprintw(wnd, p->ni_line, STATE, "%d",
520 				    p->ni_state);
521 			else
522 				mvwaddstr(wnd, p->ni_line, STATE,
523 				    tcpstates[p->ni_state]);
524 		}
525 		wclrtoeol(wnd);
526 	}
527 	if (lastrow < YMAX(wnd)) {
528 		wmove(wnd, lastrow, 0); wclrtobot(wnd);
529 		wmove(wnd, YMAX(wnd), 0); wdeleteln(wnd);	/* XXX */
530 	}
531 }
532 
533 /*
534  * Pretty print an Internet address (net address + port).
535  * If the nflag was specified, use numbers instead of names.
536  */
537 static void
538 inetprint(struct sockaddr *sa, const char *proto)
539 {
540 	struct servent *sp = 0;
541 	char line[80], *cp;
542 	int port;
543 
544 	switch (sa->sa_family) {
545 	case AF_INET:
546 		port = ((struct sockaddr_in *)sa)->sin_port;
547 		break;
548 #ifdef INET6
549 	case AF_INET6:
550 		port = ((struct sockaddr_in6 *)sa)->sin6_port;
551 		break;
552 #endif
553 	default:
554 		port = 0;
555 		break;
556 	}
557 	snprintf(line, sizeof(line), "%.*s.", 16, inetname(sa));
558 	cp = index(line, '\0');
559 	if (!nflag && port)
560 		sp = getservbyport(port, proto);
561 	if (sp || port == 0)
562 		snprintf(cp, sizeof(line) - (cp - line), "%.8s",
563 		    sp ? sp->s_name : "*");
564 	else
565 		snprintf(cp, sizeof(line) - (cp - line), "%d",
566 		    ntohs((u_short)port));
567 	/* pad to full column to clear any garbage */
568 	cp = index(line, '\0');
569 	while (cp - line < 22)
570 		*cp++ = ' ';
571 	line[22] = '\0';
572 	waddstr(wnd, line);
573 }
574 
575 /*
576  * Construct an Internet address representation.
577  * If the nflag has been supplied, give
578  * numeric value, otherwise try for symbolic name.
579  */
580 static char *
581 inetname(struct sockaddr *sa)
582 {
583 	char *cp = 0;
584 	static char line[NI_MAXHOST];
585 	struct hostent *hp;
586 	struct netent *np;
587 	struct in_addr in;
588 
589 #ifdef INET6
590 	if (sa->sa_family == AF_INET6) {
591 		if (memcmp(&((struct sockaddr_in6 *)sa)->sin6_addr,
592 		    &in6addr_any, sizeof(in6addr_any)) == 0)
593 			strcpy(line, "*");
594 		else
595 			getnameinfo(sa, sa->sa_len, line, sizeof(line), NULL, 0,
596 			    nflag ? NI_NUMERICHOST : 0);
597 		return (line);
598 	}
599 #endif
600 
601 	in = ((struct sockaddr_in *)sa)->sin_addr;
602 	if (!nflag && in.s_addr != INADDR_ANY) {
603 		int net = inet_netof(in);
604 		int lna = inet_lnaof(in);
605 
606 		if (lna == INADDR_ANY) {
607 			np = getnetbyaddr(net, AF_INET);
608 			if (np)
609 				cp = np->n_name;
610 		}
611 		if (cp == 0) {
612 			hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET);
613 			if (hp)
614 				cp = hp->h_name;
615 		}
616 	}
617 	if (in.s_addr == INADDR_ANY)
618 		strcpy(line, "*");
619 	else if (cp)
620 		snprintf(line, sizeof(line), "%s", cp);
621 	else {
622 		in.s_addr = ntohl(in.s_addr);
623 #define C(x)	((x) & 0xff)
624 		snprintf(line, sizeof(line), "%u.%u.%u.%u", C(in.s_addr >> 24),
625 			C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
626 	}
627 	return (line);
628 }
629 
630 int
631 cmdnetstat(const char *cmd, const char *args)
632 {
633 	if (prefix(cmd, "all")) {
634 		aflag = !aflag;
635 		goto fixup;
636 	}
637 	if  (prefix(cmd, "numbers") || prefix(cmd, "names")) {
638 		struct netinfo *p;
639 		int new;
640 
641 		new = prefix(cmd, "numbers");
642 		if (new == nflag)
643 			return (1);
644 		TAILQ_FOREACH(p, &netcb, chain) {
645 			if (p->ni_line == -1)
646 				continue;
647 			p->ni_flags |= NIF_LACHG|NIF_FACHG;
648 		}
649 		nflag = new;
650 		goto redisplay;
651 	}
652 	if (!netcmd(cmd, args))
653 		return (0);
654 fixup:
655 	fetchnetstat();
656 redisplay:
657 	shownetstat();
658 	refresh();
659 	return (1);
660 }
661