1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2013 Gleb Smirnoff <[email protected]>
5 * Copyright (c) 1983, 1988, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #if 0
34 #ifndef lint
35 static char sccsid[] = "@(#)if.c 8.3 (Berkeley) 4/28/95";
36 #endif /* not lint */
37 #endif
38
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
41
42 #include <sys/param.h>
43 #include <sys/protosw.h>
44 #include <sys/socket.h>
45 #include <sys/socketvar.h>
46 #include <sys/time.h>
47
48 #include <net/if.h>
49 #include <net/if_dl.h>
50 #include <net/if_types.h>
51 #include <net/ethernet.h>
52 #include <netinet/in.h>
53 #include <netinet/in_var.h>
54 #include <arpa/inet.h>
55 #ifdef PF
56 #include <net/pfvar.h>
57 #include <net/if_pfsync.h>
58 #endif
59
60 #include <err.h>
61 #include <errno.h>
62 #include <ifaddrs.h>
63 #include <libutil.h>
64 #ifdef INET6
65 #include <netdb.h>
66 #endif
67 #include <signal.h>
68 #include <stdbool.h>
69 #include <stdint.h>
70 #include <stdio.h>
71 #include <stdlib.h>
72 #include <string.h>
73 #include <sysexits.h>
74 #include <unistd.h>
75 #include <libxo/xo.h>
76
77 #include "netstat.h"
78
79 static void sidewaysintpr(void);
80
81 #ifdef PF
82 static const char* pfsyncacts[] = {
83 /* PFSYNC_ACT_CLR */ "clear all request",
84 /* PFSYNC_ACT_INS */ "state insert",
85 /* PFSYNC_ACT_INS_ACK */ "state inserted ack",
86 /* PFSYNC_ACT_UPD */ "state update",
87 /* PFSYNC_ACT_UPD_C */ "compressed state update",
88 /* PFSYNC_ACT_UPD_REQ */ "uncompressed state request",
89 /* PFSYNC_ACT_DEL */ "state delete",
90 /* PFSYNC_ACT_DEL_C */ "compressed state delete",
91 /* PFSYNC_ACT_INS_F */ "fragment insert",
92 /* PFSYNC_ACT_DEL_F */ "fragment delete",
93 /* PFSYNC_ACT_BUS */ "bulk update mark",
94 /* PFSYNC_ACT_TDB */ "TDB replay counter update",
95 /* PFSYNC_ACT_EOF */ "end of frame mark",
96 };
97
98 static const char* pfsyncacts_name[] = {
99 /* PFSYNC_ACT_CLR */ "clear-all-request",
100 /* PFSYNC_ACT_INS */ "state-insert",
101 /* PFSYNC_ACT_INS_ACK */ "state-inserted-ack",
102 /* PFSYNC_ACT_UPD */ "state-update",
103 /* PFSYNC_ACT_UPD_C */ "compressed-state-update",
104 /* PFSYNC_ACT_UPD_REQ */ "uncompressed-state-request",
105 /* PFSYNC_ACT_DEL */ "state-delete",
106 /* PFSYNC_ACT_DEL_C */ "compressed-state-delete",
107 /* PFSYNC_ACT_INS_F */ "fragment-insert",
108 /* PFSYNC_ACT_DEL_F */ "fragment-delete",
109 /* PFSYNC_ACT_BUS */ "bulk-update-mark",
110 /* PFSYNC_ACT_TDB */ "TDB-replay-counter-update",
111 /* PFSYNC_ACT_EOF */ "end-of-frame-mark",
112 };
113
114 static void
pfsync_acts_stats(const char * list,const char * desc,uint64_t * a)115 pfsync_acts_stats(const char *list, const char *desc, uint64_t *a)
116 {
117 int i;
118
119 xo_open_list(list);
120 for (i = 0; i < PFSYNC_ACT_MAX; i++, a++) {
121 if (*a || sflag <= 1) {
122 xo_open_instance(list);
123 xo_emit("\t\t{e:name}{:count/%ju} {N:/%s%s %s}\n",
124 pfsyncacts_name[i], (uintmax_t)(*a),
125 pfsyncacts[i], plural(*a), desc);
126 xo_close_instance(list);
127 }
128 }
129 xo_close_list(list);
130 }
131
132 /*
133 * Dump pfsync statistics structure.
134 */
135 void
pfsync_stats(u_long off,const char * name,int af1 __unused,int proto __unused)136 pfsync_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
137 {
138 struct pfsyncstats pfsyncstat;
139
140 if (fetch_stats("net.pfsync.stats", off, &pfsyncstat,
141 sizeof(pfsyncstat), kread) != 0)
142 return;
143
144 xo_emit("{T:/%s}:\n", name);
145 xo_open_container(name);
146
147 #define p(f, m) if (pfsyncstat.f || sflag <= 1) \
148 xo_emit(m, (uintmax_t)pfsyncstat.f, plural(pfsyncstat.f))
149
150 p(pfsyncs_ipackets, "\t{:received-inet-packets/%ju} "
151 "{N:/packet%s received (IPv4)}\n");
152 p(pfsyncs_ipackets6, "\t{:received-inet6-packets/%ju} "
153 "{N:/packet%s received (IPv6)}\n");
154 pfsync_acts_stats("input-histogram", "received",
155 &pfsyncstat.pfsyncs_iacts[0]);
156 p(pfsyncs_badif, "\t\t/{:dropped-bad-interface/%ju} "
157 "{N:/packet%s discarded for bad interface}\n");
158 p(pfsyncs_badttl, "\t\t{:dropped-bad-ttl/%ju} "
159 "{N:/packet%s discarded for bad ttl}\n");
160 p(pfsyncs_hdrops, "\t\t{:dropped-short-header/%ju} "
161 "{N:/packet%s shorter than header}\n");
162 p(pfsyncs_badver, "\t\t{:dropped-bad-version/%ju} "
163 "{N:/packet%s discarded for bad version}\n");
164 p(pfsyncs_badauth, "\t\t{:dropped-bad-auth/%ju} "
165 "{N:/packet%s discarded for bad HMAC}\n");
166 p(pfsyncs_badact,"\t\t{:dropped-bad-action/%ju} "
167 "{N:/packet%s discarded for bad action}\n");
168 p(pfsyncs_badlen, "\t\t{:dropped-short/%ju} "
169 "{N:/packet%s discarded for short packet}\n");
170 p(pfsyncs_badval, "\t\t{:dropped-bad-values/%ju} "
171 "{N:/state%s discarded for bad values}\n");
172 p(pfsyncs_stale, "\t\t{:dropped-stale-state/%ju} "
173 "{N:/stale state%s}\n");
174 p(pfsyncs_badstate, "\t\t{:dropped-failed-lookup/%ju} "
175 "{N:/failed state lookup\\/insert%s}\n");
176 p(pfsyncs_opackets, "\t{:sent-inet-packets/%ju} "
177 "{N:/packet%s sent (IPv4})\n");
178 p(pfsyncs_opackets6, "\t{:send-inet6-packets/%ju} "
179 "{N:/packet%s sent (IPv6})\n");
180 pfsync_acts_stats("output-histogram", "sent",
181 &pfsyncstat.pfsyncs_oacts[0]);
182 p(pfsyncs_onomem, "\t\t{:discarded-no-memory/%ju} "
183 "{N:/failure%s due to mbuf memory error}\n");
184 p(pfsyncs_oerrors, "\t\t{:send-errors/%ju} "
185 "{N:/send error%s}\n");
186 #undef p
187 xo_close_container(name);
188 }
189 #endif /* PF */
190
191 /*
192 * Display a formatted value, or a '-' in the same space.
193 */
194 static void
show_stat(const char * fmt,int width,const char * name,u_long value,short showvalue,int div1000)195 show_stat(const char *fmt, int width, const char *name,
196 u_long value, short showvalue, int div1000)
197 {
198 const char *lsep, *rsep;
199 char newfmt[64];
200
201 lsep = "";
202 if (strncmp(fmt, "LS", 2) == 0) {
203 lsep = " ";
204 fmt += 2;
205 }
206 rsep = " ";
207 if (strncmp(fmt, "NRS", 3) == 0) {
208 rsep = "";
209 fmt += 3;
210 }
211 if (showvalue == 0) {
212 /* Print just dash. */
213 xo_emit("{P:/%s}{D:/%*s}{P:/%s}", lsep, width, "-", rsep);
214 return;
215 }
216
217 /*
218 * XXX: workaround {P:} modifier can't be empty and doesn't seem to
219 * take args... so we need to conditionally include it in the format.
220 */
221 #define maybe_pad(pad) do { \
222 if (strlen(pad)) { \
223 snprintf(newfmt, sizeof(newfmt), "{P:%s}", pad); \
224 xo_emit(newfmt); \
225 } \
226 } while (0)
227
228 if (hflag) {
229 char buf[5];
230
231 /* Format in human readable form. */
232 humanize_number(buf, sizeof(buf), (int64_t)value, "",
233 HN_AUTOSCALE, HN_NOSPACE | HN_DECIMAL | \
234 ((div1000) ? HN_DIVISOR_1000 : 0));
235 maybe_pad(lsep);
236 snprintf(newfmt, sizeof(newfmt), "{:%s/%%%ds}", name, width);
237 xo_emit(newfmt, buf);
238 maybe_pad(rsep);
239 } else {
240 /* Construct the format string. */
241 maybe_pad(lsep);
242 snprintf(newfmt, sizeof(newfmt), "{:%s/%%%d%s}",
243 name, width, fmt);
244 xo_emit(newfmt, value);
245 maybe_pad(rsep);
246 }
247 }
248
249 /*
250 * Find next multiaddr for a given interface name.
251 */
252 static struct ifmaddrs *
next_ifma(struct ifmaddrs * ifma,const char * name,const sa_family_t family)253 next_ifma(struct ifmaddrs *ifma, const char *name, const sa_family_t family)
254 {
255
256 for(; ifma != NULL; ifma = ifma->ifma_next) {
257 struct sockaddr_dl *sdl;
258
259 sdl = (struct sockaddr_dl *)ifma->ifma_name;
260 if (ifma->ifma_addr->sa_family == family &&
261 strcmp(sdl->sdl_data, name) == 0)
262 break;
263 }
264
265 return (ifma);
266 }
267
268 /*
269 * Print a description of the network interfaces.
270 */
271 void
intpr(void (* pfunc)(char *),int af)272 intpr(void (*pfunc)(char *), int af)
273 {
274 struct ifaddrs *ifap, *ifa;
275 struct ifmaddrs *ifmap, *ifma;
276 u_int ifn_len_max = 5, ifn_len;
277 u_int has_ipv6 = 0, net_len = 13, addr_len = 17;
278
279 if (interval)
280 return sidewaysintpr();
281
282 if (getifaddrs(&ifap) != 0)
283 err(EX_OSERR, "getifaddrs");
284 if (aflag && getifmaddrs(&ifmap) != 0)
285 err(EX_OSERR, "getifmaddrs");
286
287 if (Wflag) {
288 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
289 if (interface != NULL &&
290 strcmp(ifa->ifa_name, interface) != 0)
291 continue;
292 if (af != AF_UNSPEC && ifa->ifa_addr->sa_family != af)
293 continue;
294 ifn_len = strlen(ifa->ifa_name);
295 if ((ifa->ifa_flags & IFF_UP) == 0)
296 ++ifn_len;
297 ifn_len_max = MAX(ifn_len_max, ifn_len);
298 if (ifa->ifa_addr->sa_family == AF_INET6)
299 has_ipv6 = 1;
300 }
301 if (has_ipv6) {
302 net_len = 24;
303 addr_len = 39;
304 } else
305 net_len = 18;
306 }
307
308 xo_open_list("interface");
309 if (!pfunc) {
310 xo_emit("{T:/%-*.*s}", ifn_len_max, ifn_len_max, "Name");
311 xo_emit(" {T:/%5.5s} {T:/%-*.*s} {T:/%-*.*s} {T:/%8.8s} "
312 "{T:/%5.5s} {T:/%5.5s}",
313 "Mtu", net_len, net_len, "Network", addr_len, addr_len,
314 "Address", "Ipkts", "Ierrs", "Idrop");
315 if (bflag)
316 xo_emit(" {T:/%10.10s}","Ibytes");
317 xo_emit(" {T:/%8.8s} {T:/%5.5s}", "Opkts", "Oerrs");
318 if (bflag)
319 xo_emit(" {T:/%10.10s}","Obytes");
320 xo_emit(" {T:/%5s}", "Coll");
321 if (dflag)
322 xo_emit(" {T:/%5.5s}", "Drop");
323 xo_emit("\n");
324 }
325
326 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
327 bool network = false, link = false;
328 char *name, *xname, buf[IFNAMSIZ+1];
329 const char *nn, *rn;
330
331 if (interface != NULL && strcmp(ifa->ifa_name, interface) != 0)
332 continue;
333
334 name = ifa->ifa_name;
335
336 if (pfunc) {
337
338 (*pfunc)(name);
339
340 /*
341 * Skip all ifaddrs belonging to same interface.
342 */
343 while(ifa->ifa_next != NULL &&
344 (strcmp(ifa->ifa_next->ifa_name, name) == 0)) {
345 ifa = ifa->ifa_next;
346 }
347 continue;
348 }
349
350 if (af != AF_UNSPEC && ifa->ifa_addr->sa_family != af)
351 continue;
352
353 xo_open_instance("interface");
354
355 if ((ifa->ifa_flags & IFF_UP) == 0) {
356 xname = stpcpy(buf, name);
357 *xname++ = '*';
358 *xname = '\0';
359 xname = buf;
360 } else
361 xname = name;
362
363 xo_emit("{d:/%-*.*s}{etk:name}{eq:flags/0x%x}",
364 ifn_len_max, ifn_len_max, xname, name, ifa->ifa_flags);
365
366 #define IFA_MTU(ifa) (((struct if_data *)(ifa)->ifa_data)->ifi_mtu)
367 show_stat("lu", 6, "mtu", IFA_MTU(ifa), IFA_MTU(ifa), 0);
368 #undef IFA_MTU
369
370 switch (ifa->ifa_addr->sa_family) {
371 case AF_UNSPEC:
372 xo_emit("{:network/%-*.*s} ", net_len, net_len,
373 "none");
374 xo_emit("{:address/%-*.*s} ", addr_len, addr_len,
375 "none");
376 break;
377 case AF_INET:
378 #ifdef INET6
379 case AF_INET6:
380 #endif /* INET6 */
381 nn = netname(ifa->ifa_addr, ifa->ifa_netmask);
382 rn = routename(ifa->ifa_addr, numeric_addr);
383 if (Wflag) {
384 xo_emit("{t:network/%-*s} ", net_len, nn);
385 xo_emit("{t:address/%-*s} ", addr_len, rn);
386 } else {
387 xo_emit("{d:network/%-*.*s}{et:network} ",
388 net_len, net_len, nn, nn);
389 xo_emit("{d:address/%-*.*s}{et:address} ",
390 addr_len, addr_len, rn, rn);
391 }
392
393 network = true;
394 break;
395 case AF_LINK:
396 {
397 struct sockaddr_dl *sdl;
398 char linknum[sizeof("<Link#32767>")];
399
400 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
401 snprintf(linknum, sizeof(linknum), "<Link#%d>", sdl->sdl_index);
402 xo_emit("{t:network/%-*.*s} ", net_len, net_len,
403 linknum);
404 if (sdl->sdl_nlen == 0 &&
405 sdl->sdl_alen == 0 &&
406 sdl->sdl_slen == 0)
407 xo_emit("{P:/%*s} ", addr_len, "");
408 else
409 xo_emit("{t:address/%-*.*s} ", addr_len,
410 addr_len, routename(ifa->ifa_addr, 1));
411 link = true;
412 break;
413 }
414 }
415
416 #define IFA_STAT(s) (((struct if_data *)ifa->ifa_data)->ifi_ ## s)
417 show_stat("lu", 8, "received-packets", IFA_STAT(ipackets),
418 link|network, 1);
419 show_stat("lu", 5, "received-errors", IFA_STAT(ierrors),
420 link, 1);
421 show_stat("lu", 5, "dropped-packets", IFA_STAT(iqdrops),
422 link, 1);
423 if (bflag)
424 show_stat("lu", 10, "received-bytes", IFA_STAT(ibytes),
425 link|network, 0);
426 show_stat("lu", 8, "sent-packets", IFA_STAT(opackets),
427 link|network, 1);
428 show_stat("lu", 5, "send-errors", IFA_STAT(oerrors), link, 1);
429 if (bflag)
430 show_stat("lu", 10, "sent-bytes", IFA_STAT(obytes),
431 link|network, 0);
432 show_stat("NRSlu", 5, "collisions", IFA_STAT(collisions),
433 link, 1);
434 if (dflag)
435 show_stat("LSlu", 5, "dropped-packets",
436 IFA_STAT(oqdrops), link, 1);
437 xo_emit("\n");
438
439 if (!aflag) {
440 xo_close_instance("interface");
441 continue;
442 }
443
444 /*
445 * Print family's multicast addresses.
446 */
447 xo_open_list("multicast-address");
448 for (ifma = next_ifma(ifmap, ifa->ifa_name,
449 ifa->ifa_addr->sa_family);
450 ifma != NULL;
451 ifma = next_ifma(ifma, ifa->ifa_name,
452 ifa->ifa_addr->sa_family)) {
453 const char *fmt = NULL;
454
455 xo_open_instance("multicast-address");
456 switch (ifma->ifma_addr->sa_family) {
457 case AF_LINK:
458 {
459 struct sockaddr_dl *sdl;
460
461 sdl = (struct sockaddr_dl *)ifma->ifma_addr;
462 if (sdl->sdl_type != IFT_ETHER &&
463 sdl->sdl_type != IFT_FDDI)
464 break;
465 }
466 /* FALLTHROUGH */
467 case AF_INET:
468 #ifdef INET6
469 case AF_INET6:
470 #endif /* INET6 */
471 fmt = routename(ifma->ifma_addr, numeric_addr);
472 break;
473 }
474 if (fmt) {
475 if (Wflag)
476 xo_emit("{P:/%27s }"
477 "{t:address/%-17s/}", "", fmt);
478 else
479 xo_emit("{P:/%25s }"
480 "{t:address/%-17.17s/}", "", fmt);
481 if (ifma->ifma_addr->sa_family == AF_LINK) {
482 xo_emit(" {:received-packets/%8lu}",
483 IFA_STAT(imcasts));
484 xo_emit("{P:/%*s}", bflag? 17 : 6, "");
485 xo_emit(" {:sent-packets/%8lu}",
486 IFA_STAT(omcasts));
487 }
488 xo_emit("\n");
489 }
490 xo_close_instance("multicast-address");
491 ifma = ifma->ifma_next;
492 }
493 xo_close_list("multicast-address");
494 xo_close_instance("interface");
495 }
496 xo_close_list("interface");
497
498 freeifaddrs(ifap);
499 if (aflag)
500 freeifmaddrs(ifmap);
501 }
502
503 struct iftot {
504 u_long ift_ip; /* input packets */
505 u_long ift_ie; /* input errors */
506 u_long ift_id; /* input drops */
507 u_long ift_op; /* output packets */
508 u_long ift_oe; /* output errors */
509 u_long ift_od; /* output drops */
510 u_long ift_co; /* collisions */
511 u_long ift_ib; /* input bytes */
512 u_long ift_ob; /* output bytes */
513 };
514
515 /*
516 * Obtain stats for interface(s).
517 */
518 static void
fill_iftot(struct iftot * st)519 fill_iftot(struct iftot *st)
520 {
521 struct ifaddrs *ifap, *ifa;
522 bool found = false;
523
524 if (getifaddrs(&ifap) != 0)
525 xo_err(EX_OSERR, "getifaddrs");
526
527 bzero(st, sizeof(*st));
528
529 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
530 if (ifa->ifa_addr->sa_family != AF_LINK)
531 continue;
532 if (interface) {
533 if (strcmp(ifa->ifa_name, interface) == 0)
534 found = true;
535 else
536 continue;
537 }
538
539 st->ift_ip += IFA_STAT(ipackets);
540 st->ift_ie += IFA_STAT(ierrors);
541 st->ift_id += IFA_STAT(iqdrops);
542 st->ift_ib += IFA_STAT(ibytes);
543 st->ift_op += IFA_STAT(opackets);
544 st->ift_oe += IFA_STAT(oerrors);
545 st->ift_od += IFA_STAT(oqdrops);
546 st->ift_ob += IFA_STAT(obytes);
547 st->ift_co += IFA_STAT(collisions);
548 }
549
550 if (interface && found == false)
551 xo_err(EX_DATAERR, "interface %s not found", interface);
552
553 freeifaddrs(ifap);
554 }
555
556 /*
557 * Set a flag to indicate that a signal from the periodic itimer has been
558 * caught.
559 */
560 static sig_atomic_t signalled;
561 static void
catchalarm(int signo __unused)562 catchalarm(int signo __unused)
563 {
564 signalled = true;
565 }
566
567 /*
568 * Print a running summary of interface statistics.
569 * Repeat display every interval seconds, showing statistics
570 * collected over that interval. Assumes that interval is non-zero.
571 * First line printed at top of screen is always cumulative.
572 */
573 static void
sidewaysintpr(void)574 sidewaysintpr(void)
575 {
576 struct iftot ift[2], *new, *old;
577 struct itimerval interval_it;
578 #ifndef FSTACK
579 int oldmask, line;
580 #else
581 int line;
582 sigset_t oldmask;
583 #endif
584
585 new = &ift[0];
586 old = &ift[1];
587 fill_iftot(old);
588
589 (void)signal(SIGALRM, catchalarm);
590 signalled = false;
591 interval_it.it_interval.tv_sec = interval;
592 interval_it.it_interval.tv_usec = 0;
593 interval_it.it_value = interval_it.it_interval;
594 setitimer(ITIMER_REAL, &interval_it, NULL);
595 xo_open_list("interface-statistics");
596
597 banner:
598 xo_emit("{T:/%17s} {T:/%14s} {T:/%16s}\n", "input",
599 interface != NULL ? interface : "(Total)", "output");
600 xo_emit("{T:/%10s} {T:/%5s} {T:/%5s} {T:/%10s} {T:/%10s} {T:/%5s} "
601 "{T:/%10s} {T:/%5s}",
602 "packets", "errs", "idrops", "bytes", "packets", "errs", "bytes",
603 "colls");
604 if (dflag)
605 xo_emit(" {T:/%5.5s}", "drops");
606 xo_emit("\n");
607 xo_flush();
608 line = 0;
609
610 loop:
611 if ((noutputs != 0) && (--noutputs == 0)) {
612 xo_close_list("interface-statistics");
613 return;
614 }
615 #ifndef FSTACK
616 oldmask = sigblock(sigmask(SIGALRM));
617 while (!signalled)
618 sigpause(0);
619 signalled = false;
620 sigsetmask(oldmask);
621 #else
622 sigset_t set;
623 sigemptyset(&set);
624 sigaddset(&set, SIGALRM);
625 sigprocmask(SIG_BLOCK, &set, &oldmask);
626 sigemptyset(&set);
627
628 while (!signalled)
629 sigsuspend(&set);
630 signalled = false;
631 sigprocmask(SIG_SETMASK, &oldmask, NULL);
632 #endif
633 line++;
634
635 fill_iftot(new);
636
637 xo_open_instance("stats");
638 show_stat("lu", 10, "received-packets",
639 new->ift_ip - old->ift_ip, 1, 1);
640 show_stat("lu", 5, "received-errors",
641 new->ift_ie - old->ift_ie, 1, 1);
642 show_stat("lu", 5, "dropped-packets",
643 new->ift_id - old->ift_id, 1, 1);
644 show_stat("lu", 10, "received-bytes",
645 new->ift_ib - old->ift_ib, 1, 0);
646 show_stat("lu", 10, "sent-packets",
647 new->ift_op - old->ift_op, 1, 1);
648 show_stat("lu", 5, "send-errors",
649 new->ift_oe - old->ift_oe, 1, 1);
650 show_stat("lu", 10, "sent-bytes",
651 new->ift_ob - old->ift_ob, 1, 0);
652 show_stat("NRSlu", 5, "collisions",
653 new->ift_co - old->ift_co, 1, 1);
654 if (dflag)
655 show_stat("LSlu", 5, "dropped-packets",
656 new->ift_od - old->ift_od, 1, 1);
657 xo_close_instance("stats");
658 xo_emit("\n");
659 xo_flush();
660
661 if (new == &ift[0]) {
662 new = &ift[1];
663 old = &ift[0];
664 } else {
665 new = &ift[0];
666 old = &ift[1];
667 }
668
669 if (line == 21)
670 goto banner;
671 else
672 goto loop;
673
674 /* NOTREACHED */
675 }
676