xref: /freebsd/usr.bin/systat/netstat.c (revision d93a896ef95946b0bf1219866fcb324b78543444) 
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  * 3. 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 #define	_WANT_INPCB
56 #include <netinet/in_pcb.h>
57 #include <netinet/ip_icmp.h>
58 #include <netinet/icmp_var.h>
59 #include <netinet/ip_var.h>
60 #include <netinet/tcp.h>
61 #include <netinet/tcpip.h>
62 #include <netinet/tcp_seq.h>
63 #define TCPSTATES
64 #include <netinet/tcp_fsm.h>
65 #include <netinet/tcp_timer.h>
66 #define	_WANT_TCPCB
67 #include <netinet/tcp_var.h>
68 #include <netinet/tcp_debug.h>
69 #include <netinet/udp.h>
70 #include <netinet/udp_var.h>
71 
72 #include <netdb.h>
73 #include <nlist.h>
74 #include <paths.h>
75 #include <stdlib.h>
76 #include <string.h>
77 
78 #include "systat.h"
79 #include "extern.h"
80 
81 static struct netinfo *enter(struct in_conninfo *, uint8_t, int, const char *);
82 static void enter_kvm(struct inpcb *, struct socket *, int, const char *);
83 static void enter_sysctl(struct xinpcb *, struct xsocket *, int, const char *);
84 static void fetchnetstat_kvm(void);
85 static void fetchnetstat_sysctl(void);
86 static char *inetname(struct sockaddr *);
87 static void inetprint(struct sockaddr *, const char *);
88 
89 #define	streq(a,b)	(strcmp(a,b)==0)
90 #define	YMAX(w)		(getmaxy(w)-2)
91 
92 WINDOW *
93 opennetstat(void)
94 {
95 	sethostent(1);
96 	setnetent(1);
97 	return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0));
98 }
99 
100 struct netinfo {
101 	TAILQ_ENTRY(netinfo) chain;
102 	short	ni_line;		/* line on screen */
103 	short	ni_seen;		/* 0 when not present in list */
104 	short	ni_flags;
105 #define	NIF_LACHG	0x1		/* local address changed */
106 #define	NIF_FACHG	0x2		/* foreign address changed */
107 	short	ni_state;		/* tcp state */
108 	const char	*ni_proto;		/* protocol */
109 	struct sockaddr_storage ni_lsa;	/* local address */
110 	struct sockaddr_storage	ni_fsa;	/* foreign address */
111 	u_int	ni_rcvcc;		/* rcv buffer character count */
112 	u_int	ni_sndcc;		/* snd buffer character count */
113 };
114 
115 TAILQ_HEAD(netinfohead, netinfo) netcb = TAILQ_HEAD_INITIALIZER(netcb);
116 
117 static	int aflag = 0;
118 static	int nflag = 0;
119 static	int lastrow = 1;
120 
121 void
122 closenetstat(WINDOW *w)
123 {
124 	struct netinfo *p;
125 
126 	endhostent();
127 	endnetent();
128 	TAILQ_FOREACH(p, &netcb, chain) {
129 		if (p->ni_line != -1)
130 			lastrow--;
131 		p->ni_line = -1;
132 	}
133 	if (w != NULL) {
134 		wclear(w);
135 		wrefresh(w);
136 		delwin(w);
137 	}
138 }
139 
140 static const char *miblist[] = {
141 	"net.inet.tcp.pcblist",
142 	"net.inet.udp.pcblist"
143 };
144 
145 static char tcb[] = "tcb", udb[] = "udb";
146 
147 struct nlist namelist[] = {
148 #define	X_TCB	0
149 	{ .n_name = tcb },
150 #define	X_UDB	1
151 	{ .n_name = udb },
152 	{ .n_name = NULL },
153 };
154 
155 int
156 initnetstat(void)
157 {
158 	protos = TCP|UDP;
159 	return(1);
160 }
161 
162 void
163 fetchnetstat(void)
164 {
165 	if (use_kvm)
166 		fetchnetstat_kvm();
167 	else
168 		fetchnetstat_sysctl();
169 }
170 
171 static void
172 fetchnetstat_kvm(void)
173 {
174 	struct inpcb *next;
175 	struct netinfo *p;
176 	struct inpcbhead head;
177 	struct inpcb inpcb;
178 	struct socket sockb;
179 	struct tcpcb tcpcb;
180 	void *off;
181 	int istcp;
182 
183 	if (namelist[X_TCB].n_value == 0)
184 		return;
185 	TAILQ_FOREACH(p, &netcb, chain)
186 		p->ni_seen = 0;
187 	if (protos&TCP) {
188 		off = NPTR(X_TCB);
189 		istcp = 1;
190 	}
191 	else if (protos&UDP) {
192 		off = NPTR(X_UDB);
193 		istcp = 0;
194 	}
195 	else {
196 		error("No protocols to display");
197 		return;
198 	}
199 again:
200 	KREAD(off, &head, sizeof (struct inpcbhead));
201 	LIST_FOREACH(next, &head, inp_list) {
202 		KREAD(next, &inpcb, sizeof (inpcb));
203 		next = &inpcb;
204 		if (!aflag) {
205 			if (inpcb.inp_vflag & INP_IPV4) {
206 				if (inet_lnaof(inpcb.inp_laddr) == INADDR_ANY)
207 					continue;
208 			}
209 #ifdef INET6
210 			else if (inpcb.inp_vflag & INP_IPV6) {
211 				if (memcmp(&inpcb.in6p_laddr,
212 				    &in6addr_any, sizeof(in6addr_any)) == 0)
213 					continue;
214 			}
215 #endif
216 		}
217 		if (nhosts && !checkhost(&inpcb.inp_inc))
218 			continue;
219 		if (nports && !checkport(&inpcb.inp_inc))
220 			continue;
221 		if (istcp) {
222 			if (inpcb.inp_flags & INP_TIMEWAIT) {
223 				bzero(&sockb, sizeof(sockb));
224 				enter_kvm(&inpcb, &sockb, TCPS_TIME_WAIT,
225 					 "tcp");
226 			} else {
227 				KREAD(inpcb.inp_socket, &sockb,
228 					sizeof (sockb));
229 				KREAD(inpcb.inp_ppcb, &tcpcb, sizeof (tcpcb));
230 				enter_kvm(&inpcb, &sockb, tcpcb.t_state,
231 					"tcp");
232 			}
233 		} else
234 			enter_kvm(&inpcb, &sockb, 0, "udp");
235 	}
236 	if (istcp && (protos&UDP)) {
237 		istcp = 0;
238 		off = NPTR(X_UDB);
239 		goto again;
240 	}
241 }
242 
243 static void
244 fetchnetstat_sysctl(void)
245 {
246 	struct netinfo *p;
247 	int idx;
248 	struct xinpgen *inpg;
249 	char *cur, *end;
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 				xip = &xtp->xt_inp;
296 			} else {
297 				xip = (struct xinpcb *)cur;
298 			}
299 			cur += plen;
300 
301 			if (!aflag) {
302 				if (xip->inp_vflag & INP_IPV4) {
303 					if (inet_lnaof(xip->inp_laddr) ==
304 					    INADDR_ANY)
305 						continue;
306 				}
307 #ifdef INET6
308 				else if (xip->inp_vflag & INP_IPV6) {
309 					if (memcmp(&xip->in6p_laddr,
310 					    &in6addr_any, sizeof(in6addr_any))
311 					    == 0)
312 						continue;
313 				}
314 #endif
315 			}
316 			if (nhosts && !checkhost(&xip->inp_inc))
317 				continue;
318 			if (nports && !checkport(&xip->inp_inc))
319 				continue;
320 			if (idx == 0)
321 				enter_sysctl(xip, &xip->xi_socket,
322 				    xtp->t_state, "tcp");
323 			else
324 				enter_sysctl(xip, &xip->xi_socket, 0, "udp");
325 		}
326 		free(inpg);
327 	}
328 }
329 
330 static void
331 enter_kvm(struct inpcb *inp, struct socket *so, int state, const char *proto)
332 {
333 	struct netinfo *p;
334 
335 	if ((p = enter(&inp->inp_inc, inp->inp_vflag, state, proto)) != NULL) {
336 		p->ni_rcvcc = so->so_rcv.sb_ccc;
337 		p->ni_sndcc = so->so_snd.sb_ccc;
338 	}
339 }
340 
341 static void
342 enter_sysctl(struct xinpcb *xip, struct xsocket *so, int state,
343     const char *proto)
344 {
345 	struct netinfo *p;
346 
347 	if ((p = enter(&xip->inp_inc, xip->inp_vflag, 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 static struct netinfo *
354 enter(struct in_conninfo *inc, uint8_t vflag, int state, const char *proto)
355 {
356 	struct netinfo *p;
357 	struct sockaddr_storage lsa, fsa;
358 	struct sockaddr_in *sa4;
359 #ifdef INET6
360 	struct sockaddr_in6 *sa6;
361 #endif
362 
363 	memset(&lsa, 0, sizeof(lsa));
364 	memset(&fsa, 0, sizeof(fsa));
365 	if (vflag & INP_IPV4) {
366 		sa4 = (struct sockaddr_in *)&lsa;
367 		sa4->sin_addr = inc->inc_laddr;
368 		sa4->sin_port = inc->inc_lport;
369 		sa4->sin_family = AF_INET;
370 		sa4->sin_len = sizeof(struct sockaddr_in);
371 
372 		sa4 = (struct sockaddr_in *)&fsa;
373 		sa4->sin_addr = inc->inc_faddr;
374 		sa4->sin_port = inc->inc_fport;
375 		sa4->sin_family = AF_INET;
376 		sa4->sin_len = sizeof(struct sockaddr_in);
377 	}
378 #ifdef INET6
379 	else if (vflag & INP_IPV6) {
380 		sa6 = (struct sockaddr_in6 *)&lsa;
381 		memcpy(&sa6->sin6_addr, &inc->inc6_laddr,
382 		    sizeof(struct in6_addr));
383 		sa6->sin6_port = inc->inc_lport;
384 		sa6->sin6_family = AF_INET6;
385 		sa6->sin6_len = sizeof(struct sockaddr_in6);
386 
387 		sa6 = (struct sockaddr_in6 *)&fsa;
388 		memcpy(&sa6->sin6_addr, &inc->inc6_faddr,
389 		    sizeof(struct in6_addr));
390 		sa6->sin6_port = inc->inc_fport;
391 		sa6->sin6_family = AF_INET6;
392 		sa6->sin6_len = sizeof(struct sockaddr_in6);
393 	}
394 #endif
395 	else
396 		return NULL;
397 
398 	/*
399 	 * Only take exact matches, any sockets with
400 	 * previously unbound addresses will be deleted
401 	 * below in the display routine because they
402 	 * will appear as ``not seen'' in the kernel
403 	 * data structures.
404 	 */
405 	TAILQ_FOREACH(p, &netcb, chain) {
406 		if (!streq(proto, p->ni_proto))
407 			continue;
408 		if (p->ni_lsa.ss_family != lsa.ss_family ||
409 		    memcmp(&p->ni_lsa, &lsa, lsa.ss_len) != 0)
410 			continue;
411 		if (p->ni_fsa.ss_family == fsa.ss_family &&
412 		    memcmp(&p->ni_fsa, &fsa, fsa.ss_len) == 0)
413 			break;
414 	}
415 	if (p == NULL) {
416 		if ((p = malloc(sizeof(*p))) == NULL) {
417 			error("Out of memory");
418 			return NULL;
419 		}
420 		TAILQ_INSERT_HEAD(&netcb, p, chain);
421 		p->ni_line = -1;
422 		memcpy(&p->ni_lsa, &lsa, lsa.ss_len);
423 		memcpy(&p->ni_fsa, &fsa, fsa.ss_len);
424 		p->ni_proto = strdup(proto);
425 		p->ni_flags = NIF_LACHG|NIF_FACHG;
426 	}
427 	p->ni_state = state;
428 	p->ni_seen = 1;
429 	return p;
430 }
431 
432 /* column locations */
433 #define	LADDR	0
434 #define	FADDR	LADDR+23
435 #define	PROTO	FADDR+23
436 #define	RCVCC	PROTO+6
437 #define	SNDCC	RCVCC+7
438 #define	STATE	SNDCC+7
439 
440 void
441 labelnetstat(void)
442 {
443 	if (use_kvm && namelist[X_TCB].n_type == 0)
444 		return;
445 	wmove(wnd, 0, 0); wclrtobot(wnd);
446 	mvwaddstr(wnd, 0, LADDR, "Local Address");
447 	mvwaddstr(wnd, 0, FADDR, "Foreign Address");
448 	mvwaddstr(wnd, 0, PROTO, "Proto");
449 	mvwaddstr(wnd, 0, RCVCC, "Recv-Q");
450 	mvwaddstr(wnd, 0, SNDCC, "Send-Q");
451 	mvwaddstr(wnd, 0, STATE, "(state)");
452 }
453 
454 void
455 shownetstat(void)
456 {
457 	struct netinfo *p, *q;
458 	char proto[6];
459 	const char *family = "";
460 
461 	/*
462 	 * First, delete any connections that have gone
463 	 * away and adjust the position of connections
464 	 * below to reflect the deleted line.
465 	 */
466 	p = TAILQ_FIRST(&netcb);
467 	while (p != NULL) {
468 		if (p->ni_line == -1 || p->ni_seen) {
469 			p = TAILQ_NEXT(p, chain);
470 			continue;
471 		}
472 		wmove(wnd, p->ni_line, 0); wdeleteln(wnd);
473 		TAILQ_FOREACH(q, &netcb, chain)
474 			if (q != p && q->ni_line > p->ni_line) {
475 				q->ni_line--;
476 				/* this shouldn't be necessary */
477 				q->ni_flags |= NIF_LACHG|NIF_FACHG;
478 			}
479 		lastrow--;
480 		q = TAILQ_NEXT(p, chain);
481 		TAILQ_REMOVE(&netcb, p, chain);
482 		free(p);
483 		p = q;
484 	}
485 	/*
486 	 * Update existing connections and add new ones.
487 	 */
488 	TAILQ_FOREACH(p, &netcb, chain) {
489 		if (p->ni_line == -1) {
490 			/*
491 			 * Add a new entry if possible.
492 			 */
493 			if (lastrow > YMAX(wnd))
494 				continue;
495 			p->ni_line = lastrow++;
496 			p->ni_flags |= NIF_LACHG|NIF_FACHG;
497 		}
498 		if (p->ni_flags & NIF_LACHG) {
499 			wmove(wnd, p->ni_line, LADDR);
500 			inetprint((struct sockaddr *)&p->ni_lsa, p->ni_proto);
501 			p->ni_flags &= ~NIF_LACHG;
502 		}
503 		if (p->ni_flags & NIF_FACHG) {
504 			wmove(wnd, p->ni_line, FADDR);
505 			inetprint((struct sockaddr *)&p->ni_fsa, p->ni_proto);
506 			p->ni_flags &= ~NIF_FACHG;
507 		}
508 #ifdef INET6
509 		family = (p->ni_lsa.ss_family == AF_INET) ? "4" : "6";
510 #endif
511 		snprintf(proto, sizeof(proto), "%s%s", p->ni_proto, family);
512 		mvwaddstr(wnd, p->ni_line, PROTO, proto);
513 		mvwprintw(wnd, p->ni_line, RCVCC, "%6u", p->ni_rcvcc);
514 		mvwprintw(wnd, p->ni_line, SNDCC, "%6u", p->ni_sndcc);
515 		if (streq(p->ni_proto, "tcp")) {
516 			if (p->ni_state < 0 || p->ni_state >= TCP_NSTATES)
517 				mvwprintw(wnd, p->ni_line, STATE, "%d",
518 				    p->ni_state);
519 			else
520 				mvwaddstr(wnd, p->ni_line, STATE,
521 				    tcpstates[p->ni_state]);
522 		}
523 		wclrtoeol(wnd);
524 	}
525 	if (lastrow < YMAX(wnd)) {
526 		wmove(wnd, lastrow, 0); wclrtobot(wnd);
527 		wmove(wnd, YMAX(wnd), 0); wdeleteln(wnd);	/* XXX */
528 	}
529 }
530 
531 /*
532  * Pretty print an Internet address (net address + port).
533  * If the nflag was specified, use numbers instead of names.
534  */
535 static void
536 inetprint(struct sockaddr *sa, const char *proto)
537 {
538 	struct servent *sp = 0;
539 	char line[80], *cp;
540 	int port;
541 
542 	switch (sa->sa_family) {
543 	case AF_INET:
544 		port = ((struct sockaddr_in *)sa)->sin_port;
545 		break;
546 #ifdef INET6
547 	case AF_INET6:
548 		port = ((struct sockaddr_in6 *)sa)->sin6_port;
549 		break;
550 #endif
551 	default:
552 		port = 0;
553 		break;
554 	}
555 	snprintf(line, sizeof(line), "%.*s.", 16, inetname(sa));
556 	cp = strchr(line, '\0');
557 	if (!nflag && port)
558 		sp = getservbyport(port, proto);
559 	if (sp || port == 0)
560 		snprintf(cp, sizeof(line) - (cp - line), "%.8s",
561 		    sp ? sp->s_name : "*");
562 	else
563 		snprintf(cp, sizeof(line) - (cp - line), "%d",
564 		    ntohs((u_short)port));
565 	/* pad to full column to clear any garbage */
566 	cp = strchr(line, '\0');
567 	while (cp - line < 22)
568 		*cp++ = ' ';
569 	line[22] = '\0';
570 	waddstr(wnd, line);
571 }
572 
573 /*
574  * Construct an Internet address representation.
575  * If the nflag has been supplied, give
576  * numeric value, otherwise try for symbolic name.
577  */
578 static char *
579 inetname(struct sockaddr *sa)
580 {
581 	char *cp = 0;
582 	static char line[NI_MAXHOST];
583 	struct hostent *hp;
584 	struct netent *np;
585 	struct in_addr in;
586 
587 #ifdef INET6
588 	if (sa->sa_family == AF_INET6) {
589 		if (memcmp(&((struct sockaddr_in6 *)sa)->sin6_addr,
590 		    &in6addr_any, sizeof(in6addr_any)) == 0)
591 			strcpy(line, "*");
592 		else
593 			getnameinfo(sa, sa->sa_len, line, sizeof(line), NULL, 0,
594 			    nflag ? NI_NUMERICHOST : 0);
595 		return (line);
596 	}
597 #endif
598 
599 	in = ((struct sockaddr_in *)sa)->sin_addr;
600 	if (!nflag && in.s_addr != INADDR_ANY) {
601 		int net = inet_netof(in);
602 		int lna = inet_lnaof(in);
603 
604 		if (lna == INADDR_ANY) {
605 			np = getnetbyaddr(net, AF_INET);
606 			if (np)
607 				cp = np->n_name;
608 		}
609 		if (cp == NULL) {
610 			hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET);
611 			if (hp)
612 				cp = hp->h_name;
613 		}
614 	}
615 	if (in.s_addr == INADDR_ANY)
616 		strcpy(line, "*");
617 	else if (cp)
618 		snprintf(line, sizeof(line), "%s", cp);
619 	else {
620 		in.s_addr = ntohl(in.s_addr);
621 #define C(x)	((x) & 0xff)
622 		snprintf(line, sizeof(line), "%u.%u.%u.%u", C(in.s_addr >> 24),
623 			C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
624 	}
625 	return (line);
626 }
627 
628 int
629 cmdnetstat(const char *cmd, const char *args)
630 {
631 	if (prefix(cmd, "all")) {
632 		aflag = !aflag;
633 		goto fixup;
634 	}
635 	if  (prefix(cmd, "numbers") || prefix(cmd, "names")) {
636 		struct netinfo *p;
637 		int new;
638 
639 		new = prefix(cmd, "numbers");
640 		if (new == nflag)
641 			return (1);
642 		TAILQ_FOREACH(p, &netcb, chain) {
643 			if (p->ni_line == -1)
644 				continue;
645 			p->ni_flags |= NIF_LACHG|NIF_FACHG;
646 		}
647 		nflag = new;
648 		goto redisplay;
649 	}
650 	if (!netcmd(cmd, args))
651 		return (0);
652 fixup:
653 	fetchnetstat();
654 redisplay:
655 	shownetstat();
656 	refresh();
657 	return (1);
658 }
659