1 /*-
2 * Copyright (c) 2013 Gleb Smirnoff <glebius@FreeBSD.org>
3 * Copyright (c) 1983, 1988, 1993
4 * The Regents of the University of California. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 4. Neither the name of the University nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #if 0
32 #ifndef lint
33 static char sccsid[] = "@(#)if.c 8.3 (Berkeley) 4/28/95";
34 #endif /* not lint */
35 #endif
36
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
39
40 #include <sys/param.h>
41 #include <sys/protosw.h>
42 #include <sys/socket.h>
43 #include <sys/socketvar.h>
44 #include <sys/time.h>
45
46 #include <net/if.h>
47 #include <net/if_dl.h>
48 #include <net/if_types.h>
49 #include <net/ethernet.h>
50 #include <netinet/in.h>
51 #include <netinet/in_var.h>
52 #include <arpa/inet.h>
53 #ifdef PF
54 #include <net/pfvar.h>
55 #include <net/if_pfsync.h>
56 #endif
57
58 #include <err.h>
59 #include <errno.h>
60 #include <ifaddrs.h>
61 #include <libutil.h>
62 #ifdef INET6
63 #include <netdb.h>
64 #endif
65 #include <signal.h>
66 #include <stdbool.h>
67 #include <stdint.h>
68 #include <stdio.h>
69 #include <stdlib.h>
70 #include <string.h>
71 #include <sysexits.h>
72 #include <unistd.h>
73 #include <libxo/xo.h>
74
75 #include "netstat.h"
76
77 static void sidewaysintpr(void);
78
79 #ifdef PF
80 static const char* pfsyncacts[] = {
81 /* PFSYNC_ACT_CLR */ "clear all request",
82 /* PFSYNC_ACT_INS */ "state insert",
83 /* PFSYNC_ACT_INS_ACK */ "state inserted ack",
84 /* PFSYNC_ACT_UPD */ "state update",
85 /* PFSYNC_ACT_UPD_C */ "compressed state update",
86 /* PFSYNC_ACT_UPD_REQ */ "uncompressed state request",
87 /* PFSYNC_ACT_DEL */ "state delete",
88 /* PFSYNC_ACT_DEL_C */ "compressed state delete",
89 /* PFSYNC_ACT_INS_F */ "fragment insert",
90 /* PFSYNC_ACT_DEL_F */ "fragment delete",
91 /* PFSYNC_ACT_BUS */ "bulk update mark",
92 /* PFSYNC_ACT_TDB */ "TDB replay counter update",
93 /* PFSYNC_ACT_EOF */ "end of frame mark",
94 };
95
96 static const char* pfsyncacts_name[] = {
97 /* PFSYNC_ACT_CLR */ "clear-all-request",
98 /* PFSYNC_ACT_INS */ "state-insert",
99 /* PFSYNC_ACT_INS_ACK */ "state-inserted-ack",
100 /* PFSYNC_ACT_UPD */ "state-update",
101 /* PFSYNC_ACT_UPD_C */ "compressed-state-update",
102 /* PFSYNC_ACT_UPD_REQ */ "uncompressed-state-request",
103 /* PFSYNC_ACT_DEL */ "state-delete",
104 /* PFSYNC_ACT_DEL_C */ "compressed-state-delete",
105 /* PFSYNC_ACT_INS_F */ "fragment-insert",
106 /* PFSYNC_ACT_DEL_F */ "fragment-delete",
107 /* PFSYNC_ACT_BUS */ "bulk-update-mark",
108 /* PFSYNC_ACT_TDB */ "TDB-replay-counter-update",
109 /* PFSYNC_ACT_EOF */ "end-of-frame-mark",
110 };
111
112 static void
pfsync_acts_stats(const char * list,const char * desc,uint64_t * a)113 pfsync_acts_stats(const char *list, const char *desc, uint64_t *a)
114 {
115 int i;
116
117 xo_open_list(list);
118 for (i = 0; i < PFSYNC_ACT_MAX; i++, a++) {
119 if (*a || sflag <= 1) {
120 xo_open_instance(list);
121 xo_emit("\t\t{e:name}{:count/%ju} {N:/%s%s %s}\n",
122 pfsyncacts_name[i], (uintmax_t)(*a),
123 pfsyncacts[i], plural(*a), desc);
124 xo_close_instance(list);
125 }
126 }
127 xo_close_list(list);
128 }
129
130 /*
131 * Dump pfsync statistics structure.
132 */
133 void
pfsync_stats(u_long off,const char * name,int af1 __unused,int proto __unused)134 pfsync_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
135 {
136 struct pfsyncstats pfsyncstat;
137
138 if (fetch_stats("net.pfsync.stats", off, &pfsyncstat,
139 sizeof(pfsyncstat), kread) != 0)
140 return;
141
142 xo_emit("{T:/%s}:\n", name);
143 xo_open_container(name);
144
145 #define p(f, m) if (pfsyncstat.f || sflag <= 1) \
146 xo_emit(m, (uintmax_t)pfsyncstat.f, plural(pfsyncstat.f))
147
148 p(pfsyncs_ipackets, "\t{:received-inet-packets/%ju} "
149 "{N:/packet%s received (IPv4)}\n");
150 p(pfsyncs_ipackets6, "\t{:received-inet6-packets/%ju} "
151 "{N:/packet%s received (IPv6)}\n");
152 pfsync_acts_stats("input-histogram", "received",
153 &pfsyncstat.pfsyncs_iacts[0]);
154 p(pfsyncs_badif, "\t\t/{:dropped-bad-interface/%ju} "
155 "{N:/packet%s discarded for bad interface}\n");
156 p(pfsyncs_badttl, "\t\t{:dropped-bad-ttl/%ju} "
157 "{N:/packet%s discarded for bad ttl}\n");
158 p(pfsyncs_hdrops, "\t\t{:dropped-short-header/%ju} "
159 "{N:/packet%s shorter than header}\n");
160 p(pfsyncs_badver, "\t\t{:dropped-bad-version/%ju} "
161 "{N:/packet%s discarded for bad version}\n");
162 p(pfsyncs_badauth, "\t\t{:dropped-bad-auth/%ju} "
163 "{N:/packet%s discarded for bad HMAC}\n");
164 p(pfsyncs_badact,"\t\t{:dropped-bad-action/%ju} "
165 "{N:/packet%s discarded for bad action}\n");
166 p(pfsyncs_badlen, "\t\t{:dropped-short/%ju} "
167 "{N:/packet%s discarded for short packet}\n");
168 p(pfsyncs_badval, "\t\t{:dropped-bad-values/%ju} "
169 "{N:/state%s discarded for bad values}\n");
170 p(pfsyncs_stale, "\t\t{:dropped-stale-state/%ju} "
171 "{N:/stale state%s}\n");
172 p(pfsyncs_badstate, "\t\t{:dropped-failed-lookup/%ju} "
173 "{N:/failed state lookup\\/insert%s}\n");
174 p(pfsyncs_opackets, "\t{:sent-inet-packets/%ju} "
175 "{N:/packet%s sent (IPv4})\n");
176 p(pfsyncs_opackets6, "\t{:send-inet6-packets/%ju} "
177 "{N:/packet%s sent (IPv6})\n");
178 pfsync_acts_stats("output-histogram", "sent",
179 &pfsyncstat.pfsyncs_oacts[0]);
180 p(pfsyncs_onomem, "\t\t{:discarded-no-memory/%ju} "
181 "{N:/failure%s due to mbuf memory error}\n");
182 p(pfsyncs_oerrors, "\t\t{:send-errors/%ju} "
183 "{N:/send error%s}\n");
184 #undef p
185 xo_close_container(name);
186 }
187 #endif /* PF */
188
189 /*
190 * Display a formatted value, or a '-' in the same space.
191 */
192 static void
show_stat(const char * fmt,int width,const char * name,u_long value,short showvalue,int div1000)193 show_stat(const char *fmt, int width, const char *name,
194 u_long value, short showvalue, int div1000)
195 {
196 const char *lsep, *rsep;
197 char newfmt[64];
198
199 lsep = "";
200 if (strncmp(fmt, "LS", 2) == 0) {
201 lsep = " ";
202 fmt += 2;
203 }
204 rsep = " ";
205 if (strncmp(fmt, "NRS", 3) == 0) {
206 rsep = "";
207 fmt += 3;
208 }
209 if (showvalue == 0) {
210 /* Print just dash. */
211 xo_emit("{P:/%s}{D:/%*s}{P:/%s}", lsep, width, "-", rsep);
212 return;
213 }
214
215 /*
216 * XXX: workaround {P:} modifier can't be empty and doesn't seem to
217 * take args... so we need to conditionally include it in the format.
218 */
219 #define maybe_pad(pad) do { \
220 if (strlen(pad)) { \
221 snprintf(newfmt, sizeof(newfmt), "{P:%s}", pad); \
222 xo_emit(newfmt); \
223 } \
224 } while (0)
225
226 if (hflag) {
227 char buf[5];
228
229 /* Format in human readable form. */
230 humanize_number(buf, sizeof(buf), (int64_t)value, "",
231 HN_AUTOSCALE, HN_NOSPACE | HN_DECIMAL | \
232 ((div1000) ? HN_DIVISOR_1000 : 0));
233 maybe_pad(lsep);
234 snprintf(newfmt, sizeof(newfmt), "{:%s/%%%ds}", name, width);
235 xo_emit(newfmt, buf);
236 maybe_pad(rsep);
237 } else {
238 /* Construct the format string. */
239 maybe_pad(lsep);
240 snprintf(newfmt, sizeof(newfmt), "{:%s/%%%d%s}",
241 name, width, fmt);
242 xo_emit(newfmt, value);
243 maybe_pad(rsep);
244 }
245 }
246
247 /*
248 * Find next multiaddr for a given interface name.
249 */
250 static struct ifmaddrs *
next_ifma(struct ifmaddrs * ifma,const char * name,const sa_family_t family)251 next_ifma(struct ifmaddrs *ifma, const char *name, const sa_family_t family)
252 {
253
254 for(; ifma != NULL; ifma = ifma->ifma_next) {
255 struct sockaddr_dl *sdl;
256
257 sdl = (struct sockaddr_dl *)ifma->ifma_name;
258 if (ifma->ifma_addr->sa_family == family &&
259 strcmp(sdl->sdl_data, name) == 0)
260 break;
261 }
262
263 return (ifma);
264 }
265
266 /*
267 * Print a description of the network interfaces.
268 */
269 void
intpr(void (* pfunc)(char *),int af)270 intpr(void (*pfunc)(char *), int af)
271 {
272 struct ifaddrs *ifap, *ifa;
273 struct ifmaddrs *ifmap, *ifma;
274 u_int ifn_len_max = 5, ifn_len;
275 u_int has_ipv6 = 0, net_len = 13, addr_len = 17;
276
277 if (interval)
278 return sidewaysintpr();
279
280 if (getifaddrs(&ifap) != 0)
281 err(EX_OSERR, "getifaddrs");
282 if (aflag && getifmaddrs(&ifmap) != 0)
283 err(EX_OSERR, "getifmaddrs");
284
285 if (Wflag) {
286 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
287 if (interface != NULL &&
288 strcmp(ifa->ifa_name, interface) != 0)
289 continue;
290 if (af != AF_UNSPEC && ifa->ifa_addr->sa_family != af)
291 continue;
292 ifn_len = strlen(ifa->ifa_name);
293 if ((ifa->ifa_flags & IFF_UP) == 0)
294 ++ifn_len;
295 ifn_len_max = MAX(ifn_len_max, ifn_len);
296 if (ifa->ifa_addr->sa_family == AF_INET6)
297 has_ipv6 = 1;
298 }
299 if (has_ipv6) {
300 net_len = 24;
301 addr_len = 39;
302 } else
303 net_len = 18;
304 }
305
306 xo_open_list("interface");
307 if (!pfunc) {
308 xo_emit("{T:/%-*.*s}", ifn_len_max, ifn_len_max, "Name");
309 xo_emit(" {T:/%5.5s} {T:/%-*.*s} {T:/%-*.*s} {T:/%8.8s} "
310 "{T:/%5.5s} {T:/%5.5s}",
311 "Mtu", net_len, net_len, "Network", addr_len, addr_len,
312 "Address", "Ipkts", "Ierrs", "Idrop");
313 if (bflag)
314 xo_emit(" {T:/%10.10s}","Ibytes");
315 xo_emit(" {T:/%8.8s} {T:/%5.5s}", "Opkts", "Oerrs");
316 if (bflag)
317 xo_emit(" {T:/%10.10s}","Obytes");
318 xo_emit(" {T:/%5s}", "Coll");
319 if (dflag)
320 xo_emit(" {T:/%5.5s}", "Drop");
321 xo_emit("\n");
322 }
323
324 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
325 bool network = false, link = false;
326 char *name, *xname, buf[IFNAMSIZ+1];
327 const char *nn, *rn;
328
329 if (interface != NULL && strcmp(ifa->ifa_name, interface) != 0)
330 continue;
331
332 name = ifa->ifa_name;
333
334 if (pfunc) {
335
336 (*pfunc)(name);
337
338 /*
339 * Skip all ifaddrs belonging to same interface.
340 */
341 while(ifa->ifa_next != NULL &&
342 (strcmp(ifa->ifa_next->ifa_name, name) == 0)) {
343 ifa = ifa->ifa_next;
344 }
345 continue;
346 }
347
348 if (af != AF_UNSPEC && ifa->ifa_addr->sa_family != af)
349 continue;
350
351 xo_open_instance("interface");
352
353 if ((ifa->ifa_flags & IFF_UP) == 0) {
354 xname = stpcpy(buf, name);
355 *xname++ = '*';
356 *xname = '\0';
357 xname = buf;
358 } else
359 xname = name;
360
361 xo_emit("{d:/%-*.*s}{etk:name}{eq:flags/0x%x}",
362 ifn_len_max, ifn_len_max, xname, name, ifa->ifa_flags);
363
364 #define IFA_MTU(ifa) (((struct if_data *)(ifa)->ifa_data)->ifi_mtu)
365 show_stat("lu", 6, "mtu", IFA_MTU(ifa), IFA_MTU(ifa), 0);
366 #undef IFA_MTU
367
368 switch (ifa->ifa_addr->sa_family) {
369 case AF_UNSPEC:
370 xo_emit("{:network/%-*.*s} ", net_len, net_len,
371 "none");
372 xo_emit("{:address/%-*.*s} ", addr_len, addr_len,
373 "none");
374 break;
375 case AF_INET:
376 #ifdef INET6
377 case AF_INET6:
378 #endif /* INET6 */
379 nn = netname(ifa->ifa_addr, ifa->ifa_netmask);
380 rn = routename(ifa->ifa_addr, numeric_addr);
381 if (Wflag) {
382 xo_emit("{t:network/%-*s} ", net_len, nn);
383 xo_emit("{t:address/%-*s} ", addr_len, rn);
384 } else {
385 xo_emit("{d:network/%-*.*s}{et:network} ",
386 net_len, net_len, nn, nn);
387 xo_emit("{d:address/%-*.*s}{et:address} ",
388 addr_len, addr_len, rn, rn);
389 }
390
391 network = true;
392 break;
393 case AF_LINK:
394 {
395 struct sockaddr_dl *sdl;
396 char linknum[10];
397
398 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
399 sprintf(linknum, "<Link#%d>", sdl->sdl_index);
400 xo_emit("{t:network/%-*.*s} ", net_len, net_len,
401 linknum);
402 if (sdl->sdl_nlen == 0 &&
403 sdl->sdl_alen == 0 &&
404 sdl->sdl_slen == 0)
405 xo_emit("{P:/%*s} ", addr_len, "");
406 else
407 xo_emit("{t:address/%-*.*s} ", addr_len,
408 addr_len, routename(ifa->ifa_addr, 1));
409 link = true;
410 break;
411 }
412 }
413
414 #define IFA_STAT(s) (((struct if_data *)ifa->ifa_data)->ifi_ ## s)
415 show_stat("lu", 8, "received-packets", IFA_STAT(ipackets),
416 link|network, 1);
417 show_stat("lu", 5, "received-errors", IFA_STAT(ierrors),
418 link, 1);
419 show_stat("lu", 5, "dropped-packets", IFA_STAT(iqdrops),
420 link, 1);
421 if (bflag)
422 show_stat("lu", 10, "received-bytes", IFA_STAT(ibytes),
423 link|network, 0);
424 show_stat("lu", 8, "sent-packets", IFA_STAT(opackets),
425 link|network, 1);
426 show_stat("lu", 5, "send-errors", IFA_STAT(oerrors), link, 1);
427 if (bflag)
428 show_stat("lu", 10, "sent-bytes", IFA_STAT(obytes),
429 link|network, 0);
430 show_stat("NRSlu", 5, "collisions", IFA_STAT(collisions),
431 link, 1);
432 if (dflag)
433 show_stat("LSlu", 5, "dropped-packets",
434 IFA_STAT(oqdrops), link, 1);
435 xo_emit("\n");
436
437 if (!aflag) {
438 xo_close_instance("interface");
439 continue;
440 }
441
442 /*
443 * Print family's multicast addresses.
444 */
445 xo_open_list("multicast-address");
446 for (ifma = next_ifma(ifmap, ifa->ifa_name,
447 ifa->ifa_addr->sa_family);
448 ifma != NULL;
449 ifma = next_ifma(ifma, ifa->ifa_name,
450 ifa->ifa_addr->sa_family)) {
451 const char *fmt = NULL;
452
453 xo_open_instance("multicast-address");
454 switch (ifma->ifma_addr->sa_family) {
455 case AF_LINK:
456 {
457 struct sockaddr_dl *sdl;
458
459 sdl = (struct sockaddr_dl *)ifma->ifma_addr;
460 if (sdl->sdl_type != IFT_ETHER &&
461 sdl->sdl_type != IFT_FDDI)
462 break;
463 }
464 /* FALLTHROUGH */
465 case AF_INET:
466 #ifdef INET6
467 case AF_INET6:
468 #endif /* INET6 */
469 fmt = routename(ifma->ifma_addr, numeric_addr);
470 break;
471 }
472 if (fmt) {
473 if (Wflag)
474 xo_emit("{P:/%27s }"
475 "{t:address/%-17s/}", "", fmt);
476 else
477 xo_emit("{P:/%25s }"
478 "{t:address/%-17.17s/}", "", fmt);
479 if (ifma->ifma_addr->sa_family == AF_LINK) {
480 xo_emit(" {:received-packets/%8lu}",
481 IFA_STAT(imcasts));
482 xo_emit("{P:/%*s}", bflag? 17 : 6, "");
483 xo_emit(" {:sent-packets/%8lu}",
484 IFA_STAT(omcasts));
485 }
486 xo_emit("\n");
487 }
488 xo_close_instance("multicast-address");
489 ifma = ifma->ifma_next;
490 }
491 xo_close_list("multicast-address");
492 xo_close_instance("interface");
493 }
494 xo_close_list("interface");
495
496 freeifaddrs(ifap);
497 if (aflag)
498 freeifmaddrs(ifmap);
499 }
500
501 struct iftot {
502 u_long ift_ip; /* input packets */
503 u_long ift_ie; /* input errors */
504 u_long ift_id; /* input drops */
505 u_long ift_op; /* output packets */
506 u_long ift_oe; /* output errors */
507 u_long ift_od; /* output drops */
508 u_long ift_co; /* collisions */
509 u_long ift_ib; /* input bytes */
510 u_long ift_ob; /* output bytes */
511 };
512
513 /*
514 * Obtain stats for interface(s).
515 */
516 static void
fill_iftot(struct iftot * st)517 fill_iftot(struct iftot *st)
518 {
519 struct ifaddrs *ifap, *ifa;
520 bool found = false;
521
522 if (getifaddrs(&ifap) != 0)
523 xo_err(EX_OSERR, "getifaddrs");
524
525 bzero(st, sizeof(*st));
526
527 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
528 if (ifa->ifa_addr->sa_family != AF_LINK)
529 continue;
530 if (interface) {
531 if (strcmp(ifa->ifa_name, interface) == 0)
532 found = true;
533 else
534 continue;
535 }
536
537 st->ift_ip += IFA_STAT(ipackets);
538 st->ift_ie += IFA_STAT(ierrors);
539 st->ift_id += IFA_STAT(iqdrops);
540 st->ift_ib += IFA_STAT(ibytes);
541 st->ift_op += IFA_STAT(opackets);
542 st->ift_oe += IFA_STAT(oerrors);
543 st->ift_od += IFA_STAT(oqdrops);
544 st->ift_ob += IFA_STAT(obytes);
545 st->ift_co += IFA_STAT(collisions);
546 }
547
548 if (interface && found == false)
549 xo_err(EX_DATAERR, "interface %s not found", interface);
550
551 freeifaddrs(ifap);
552 }
553
554 /*
555 * Set a flag to indicate that a signal from the periodic itimer has been
556 * caught.
557 */
558 static sig_atomic_t signalled;
559 static void
catchalarm(int signo __unused)560 catchalarm(int signo __unused)
561 {
562 signalled = true;
563 }
564
565 /*
566 * Print a running summary of interface statistics.
567 * Repeat display every interval seconds, showing statistics
568 * collected over that interval. Assumes that interval is non-zero.
569 * First line printed at top of screen is always cumulative.
570 */
571 static void
sidewaysintpr(void)572 sidewaysintpr(void)
573 {
574 struct iftot ift[2], *new, *old;
575 struct itimerval interval_it;
576 int oldmask, line;
577
578 new = &ift[0];
579 old = &ift[1];
580 fill_iftot(old);
581
582 (void)signal(SIGALRM, catchalarm);
583 signalled = false;
584 interval_it.it_interval.tv_sec = interval;
585 interval_it.it_interval.tv_usec = 0;
586 interval_it.it_value = interval_it.it_interval;
587 setitimer(ITIMER_REAL, &interval_it, NULL);
588 xo_open_list("interface-statistics");
589
590 banner:
591 xo_emit("{T:/%17s} {T:/%14s} {T:/%16s}\n", "input",
592 interface != NULL ? interface : "(Total)", "output");
593 xo_emit("{T:/%10s} {T:/%5s} {T:/%5s} {T:/%10s} {T:/%10s} {T:/%5s} "
594 "{T:/%10s} {T:/%5s}",
595 "packets", "errs", "idrops", "bytes", "packets", "errs", "bytes",
596 "colls");
597 if (dflag)
598 xo_emit(" {T:/%5.5s}", "drops");
599 xo_emit("\n");
600 xo_flush();
601 line = 0;
602
603 loop:
604 if ((noutputs != 0) && (--noutputs == 0)) {
605 xo_close_list("interface-statistics");
606 return;
607 }
608 oldmask = sigblock(sigmask(SIGALRM));
609 while (!signalled)
610 sigpause(0);
611 signalled = false;
612 sigsetmask(oldmask);
613 line++;
614
615 fill_iftot(new);
616
617 xo_open_instance("stats");
618 show_stat("lu", 10, "received-packets",
619 new->ift_ip - old->ift_ip, 1, 1);
620 show_stat("lu", 5, "received-errors",
621 new->ift_ie - old->ift_ie, 1, 1);
622 show_stat("lu", 5, "dropped-packets",
623 new->ift_id - old->ift_id, 1, 1);
624 show_stat("lu", 10, "received-bytes",
625 new->ift_ib - old->ift_ib, 1, 0);
626 show_stat("lu", 10, "sent-packets",
627 new->ift_op - old->ift_op, 1, 1);
628 show_stat("lu", 5, "send-errors",
629 new->ift_oe - old->ift_oe, 1, 1);
630 show_stat("lu", 10, "sent-bytes",
631 new->ift_ob - old->ift_ob, 1, 0);
632 show_stat("NRSlu", 5, "collisions",
633 new->ift_co - old->ift_co, 1, 1);
634 if (dflag)
635 show_stat("LSlu", 5, "dropped-packets",
636 new->ift_od - old->ift_od, 1, 1);
637 xo_close_instance("stats");
638 xo_emit("\n");
639 xo_flush();
640
641 if (new == &ift[0]) {
642 new = &ift[1];
643 old = &ift[0];
644 } else {
645 new = &ift[0];
646 old = &ift[1];
647 }
648
649 if (line == 21)
650 goto banner;
651 else
652 goto loop;
653
654 /* NOTREACHED */
655 }
656