1 /* 2 * Copyright (c) 1983, 1988, 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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #if 0 35 #ifndef lint 36 static char sccsid[] = "@(#)if.c 8.3 (Berkeley) 4/28/95"; 37 #endif /* not lint */ 38 #endif 39 40 #include <sys/cdefs.h> 41 __FBSDID("$FreeBSD$"); 42 43 #include <sys/types.h> 44 #include <sys/protosw.h> 45 #include <sys/socket.h> 46 #include <sys/socketvar.h> 47 #include <sys/sysctl.h> 48 #include <sys/time.h> 49 50 #include <net/if.h> 51 #include <net/if_var.h> 52 #include <net/if_dl.h> 53 #include <net/if_types.h> 54 #include <net/ethernet.h> 55 #include <net/pfvar.h> 56 #include <net/if_pfsync.h> 57 #include <netinet/in.h> 58 #include <netinet/in_var.h> 59 #include <netipx/ipx.h> 60 #include <netipx/ipx_if.h> 61 #include <arpa/inet.h> 62 63 #include <err.h> 64 #include <errno.h> 65 #include <libutil.h> 66 #include <signal.h> 67 #include <stdint.h> 68 #include <stdio.h> 69 #include <stdlib.h> 70 #include <string.h> 71 #include <unistd.h> 72 73 #include "netstat.h" 74 75 #define YES 1 76 #define NO 0 77 78 static void sidewaysintpr(int, u_long); 79 static void catchalarm(int); 80 81 #ifdef INET6 82 static char ntop_buf[INET6_ADDRSTRLEN]; /* for inet_ntop() */ 83 #endif 84 85 /* 86 * Dump pfsync statistics structure. 87 */ 88 void 89 pfsync_stats(u_long off, const char *name, int af1 __unused, int proto __unused) 90 { 91 struct pfsyncstats pfsyncstat, zerostat; 92 size_t len = sizeof(struct pfsyncstats); 93 94 if (live) { 95 if (zflag) 96 memset(&zerostat, 0, len); 97 if (sysctlbyname("net.inet.pfsync.stats", &pfsyncstat, &len, 98 zflag ? &zerostat : NULL, zflag ? len : 0) < 0) { 99 if (errno != ENOENT) 100 warn("sysctl: net.inet.pfsync.stats"); 101 return; 102 } 103 } else 104 kread(off, &pfsyncstat, len); 105 106 printf("%s:\n", name); 107 108 #define p(f, m) if (pfsyncstat.f || sflag <= 1) \ 109 printf(m, (uintmax_t)pfsyncstat.f, plural(pfsyncstat.f)) 110 #define p2(f, m) if (pfsyncstat.f || sflag <= 1) \ 111 printf(m, (uintmax_t)pfsyncstat.f) 112 113 p(pfsyncs_ipackets, "\t%ju packet%s received (IPv4)\n"); 114 p(pfsyncs_ipackets6, "\t%ju packet%s received (IPv6)\n"); 115 p(pfsyncs_badif, "\t\t%ju packet%s discarded for bad interface\n"); 116 p(pfsyncs_badttl, "\t\t%ju packet%s discarded for bad ttl\n"); 117 p(pfsyncs_hdrops, "\t\t%ju packet%s shorter than header\n"); 118 p(pfsyncs_badver, "\t\t%ju packet%s discarded for bad version\n"); 119 p(pfsyncs_badauth, "\t\t%ju packet%s discarded for bad HMAC\n"); 120 p(pfsyncs_badact,"\t\t%ju packet%s discarded for bad action\n"); 121 p(pfsyncs_badlen, "\t\t%ju packet%s discarded for short packet\n"); 122 p(pfsyncs_badval, "\t\t%ju state%s discarded for bad values\n"); 123 p(pfsyncs_stale, "\t\t%ju stale state%s\n"); 124 p(pfsyncs_badstate, "\t\t%ju failed state lookup/insert%s\n"); 125 p(pfsyncs_opackets, "\t%ju packet%s sent (IPv4)\n"); 126 p(pfsyncs_opackets6, "\t%ju packet%s sent (IPv6)\n"); 127 p2(pfsyncs_onomem, "\t\t%ju send failed due to mbuf memory error\n"); 128 p2(pfsyncs_oerrors, "\t\t%ju send error\n"); 129 #undef p 130 #undef p2 131 } 132 133 /* 134 * Display a formatted value, or a '-' in the same space. 135 */ 136 static void 137 show_stat(const char *fmt, int width, u_long value, short showvalue) 138 { 139 const char *lsep, *rsep; 140 char newfmt[32]; 141 142 lsep = ""; 143 if (strncmp(fmt, "LS", 2) == 0) { 144 lsep = " "; 145 fmt += 2; 146 } 147 rsep = " "; 148 if (strncmp(fmt, "NRS", 3) == 0) { 149 rsep = ""; 150 fmt += 3; 151 } 152 if (showvalue == 0) { 153 /* Print just dash. */ 154 sprintf(newfmt, "%s%%%ds%s", lsep, width, rsep); 155 printf(newfmt, "-"); 156 return; 157 } 158 159 if (hflag) { 160 char buf[5]; 161 162 /* Format in human readable form. */ 163 humanize_number(buf, sizeof(buf), (int64_t)value, "", 164 HN_AUTOSCALE, HN_NOSPACE | HN_DECIMAL); 165 sprintf(newfmt, "%s%%%ds%s", lsep, width, rsep); 166 printf(newfmt, buf); 167 } else { 168 /* Construct the format string. */ 169 sprintf(newfmt, "%s%%%d%s%s", lsep, width, fmt, rsep); 170 printf(newfmt, value); 171 } 172 } 173 174 /* 175 * Print a description of the network interfaces. 176 */ 177 void 178 intpr(int interval1, u_long ifnetaddr, void (*pfunc)(char *)) 179 { 180 struct ifnet ifnet; 181 struct ifnethead ifnethead; 182 union { 183 struct ifaddr ifa; 184 struct in_ifaddr in; 185 #ifdef INET6 186 struct in6_ifaddr in6; 187 #endif 188 struct ipx_ifaddr ipx; 189 } ifaddr; 190 u_long ifaddraddr; 191 u_long ifaddrfound; 192 u_long ifnetfound; 193 u_long opackets; 194 u_long ipackets; 195 u_long obytes; 196 u_long ibytes; 197 u_long omcasts; 198 u_long imcasts; 199 u_long oerrors; 200 u_long ierrors; 201 u_long collisions; 202 short timer; 203 int drops; 204 struct sockaddr *sa = NULL; 205 char name[IFNAMSIZ]; 206 short network_layer; 207 short link_layer; 208 209 if (ifnetaddr == 0) { 210 printf("ifnet: symbol not defined\n"); 211 return; 212 } 213 if (interval1) { 214 sidewaysintpr(interval1, ifnetaddr); 215 return; 216 } 217 if (kread(ifnetaddr, (char *)&ifnethead, sizeof ifnethead)) 218 return; 219 ifnetaddr = (u_long)TAILQ_FIRST(&ifnethead); 220 if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet)) 221 return; 222 223 if (!pfunc) { 224 if (Wflag) 225 printf("%-7.7s", "Name"); 226 else 227 printf("%-5.5s", "Name"); 228 printf(" %5.5s %-13.13s %-17.17s %8.8s %5.5s", 229 "Mtu", "Network", "Address", "Ipkts", "Ierrs"); 230 if (bflag) 231 printf(" %10.10s","Ibytes"); 232 printf(" %8.8s %5.5s", "Opkts", "Oerrs"); 233 if (bflag) 234 printf(" %10.10s","Obytes"); 235 printf(" %5s", "Coll"); 236 if (tflag) 237 printf(" %s", "Time"); 238 if (dflag) 239 printf(" %s", "Drop"); 240 putchar('\n'); 241 } 242 ifaddraddr = 0; 243 while (ifnetaddr || ifaddraddr) { 244 struct sockaddr_in *sockin; 245 #ifdef INET6 246 struct sockaddr_in6 *sockin6; 247 #endif 248 char *cp; 249 int n, m; 250 251 network_layer = 0; 252 link_layer = 0; 253 254 if (ifaddraddr == 0) { 255 ifnetfound = ifnetaddr; 256 if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet)) 257 return; 258 strlcpy(name, ifnet.if_xname, sizeof(name)); 259 ifnetaddr = (u_long)TAILQ_NEXT(&ifnet, if_link); 260 if (interface != 0 && (strcmp(name, interface) != 0)) 261 continue; 262 cp = index(name, '\0'); 263 264 if (pfunc) { 265 (*pfunc)(name); 266 continue; 267 } 268 269 if ((ifnet.if_flags&IFF_UP) == 0) 270 *cp++ = '*'; 271 *cp = '\0'; 272 ifaddraddr = (u_long)TAILQ_FIRST(&ifnet.if_addrhead); 273 } 274 ifaddrfound = ifaddraddr; 275 276 /* 277 * Get the interface stats. These may get 278 * overriden below on a per-interface basis. 279 */ 280 opackets = ifnet.if_opackets; 281 ipackets = ifnet.if_ipackets; 282 obytes = ifnet.if_obytes; 283 ibytes = ifnet.if_ibytes; 284 omcasts = ifnet.if_omcasts; 285 imcasts = ifnet.if_imcasts; 286 oerrors = ifnet.if_oerrors; 287 ierrors = ifnet.if_ierrors; 288 collisions = ifnet.if_collisions; 289 timer = ifnet.if_timer; 290 drops = ifnet.if_snd.ifq_drops; 291 292 if (ifaddraddr == 0) { 293 if (Wflag) 294 printf("%-7.7s", name); 295 else 296 printf("%-5.5s", name); 297 printf(" %5lu ", ifnet.if_mtu); 298 printf("%-13.13s ", "none"); 299 printf("%-17.17s ", "none"); 300 } else { 301 if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)) { 302 ifaddraddr = 0; 303 continue; 304 } 305 #define CP(x) ((char *)(x)) 306 cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) + 307 CP(&ifaddr); 308 sa = (struct sockaddr *)cp; 309 if (af != AF_UNSPEC && sa->sa_family != af) { 310 ifaddraddr = 311 (u_long)TAILQ_NEXT(&ifaddr.ifa, ifa_link); 312 continue; 313 } 314 if (Wflag) 315 printf("%-7.7s", name); 316 else 317 printf("%-5.5s", name); 318 printf(" %5lu ", ifnet.if_mtu); 319 switch (sa->sa_family) { 320 case AF_UNSPEC: 321 printf("%-13.13s ", "none"); 322 printf("%-15.15s ", "none"); 323 break; 324 case AF_INET: 325 sockin = (struct sockaddr_in *)sa; 326 #ifdef notdef 327 /* can't use inet_makeaddr because kernel 328 * keeps nets unshifted. 329 */ 330 in = inet_makeaddr(ifaddr.in.ia_subnet, 331 INADDR_ANY); 332 printf("%-13.13s ", netname(in.s_addr, 333 ifaddr.in.ia_subnetmask)); 334 #else 335 printf("%-13.13s ", 336 netname(htonl(ifaddr.in.ia_subnet), 337 ifaddr.in.ia_subnetmask)); 338 #endif 339 printf("%-17.17s ", 340 routename(sockin->sin_addr.s_addr)); 341 342 network_layer = 1; 343 break; 344 #ifdef INET6 345 case AF_INET6: 346 sockin6 = (struct sockaddr_in6 *)sa; 347 printf("%-13.13s ", 348 netname6(&ifaddr.in6.ia_addr, 349 &ifaddr.in6.ia_prefixmask.sin6_addr)); 350 printf("%-17.17s ", 351 inet_ntop(AF_INET6, 352 &sockin6->sin6_addr, 353 ntop_buf, sizeof(ntop_buf))); 354 355 network_layer = 1; 356 break; 357 #endif /*INET6*/ 358 case AF_IPX: 359 { 360 struct sockaddr_ipx *sipx = 361 (struct sockaddr_ipx *)sa; 362 u_long net; 363 char netnum[10]; 364 365 *(union ipx_net *) &net = sipx->sipx_addr.x_net; 366 sprintf(netnum, "%lx", (u_long)ntohl(net)); 367 printf("ipx:%-8s ", netnum); 368 /* printf("ipx:%-8s ", netname(net, 0L)); */ 369 printf("%-17s ", 370 ipx_phost((struct sockaddr *)sipx)); 371 } 372 373 network_layer = 1; 374 break; 375 376 case AF_APPLETALK: 377 printf("atalk:%-12.12s ",atalk_print(sa,0x10) ); 378 printf("%-11.11s ",atalk_print(sa,0x0b) ); 379 break; 380 case AF_LINK: 381 { 382 struct sockaddr_dl *sdl = 383 (struct sockaddr_dl *)sa; 384 char linknum[10]; 385 cp = (char *)LLADDR(sdl); 386 n = sdl->sdl_alen; 387 sprintf(linknum, "<Link#%d>", sdl->sdl_index); 388 m = printf("%-13.13s ", linknum); 389 } 390 goto hexprint; 391 default: 392 m = printf("(%d)", sa->sa_family); 393 for (cp = sa->sa_len + (char *)sa; 394 --cp > sa->sa_data && (*cp == 0);) {} 395 n = cp - sa->sa_data + 1; 396 cp = sa->sa_data; 397 hexprint: 398 while (--n >= 0) 399 m += printf("%02x%c", *cp++ & 0xff, 400 n > 0 ? ':' : ' '); 401 m = 32 - m; 402 while (m-- > 0) 403 putchar(' '); 404 405 link_layer = 1; 406 break; 407 } 408 409 /* 410 * Fixup the statistics for interfaces that 411 * update stats for their network addresses 412 */ 413 if (network_layer) { 414 opackets = ifaddr.in.ia_ifa.if_opackets; 415 ipackets = ifaddr.in.ia_ifa.if_ipackets; 416 obytes = ifaddr.in.ia_ifa.if_obytes; 417 ibytes = ifaddr.in.ia_ifa.if_ibytes; 418 } 419 420 ifaddraddr = (u_long)TAILQ_NEXT(&ifaddr.ifa, ifa_link); 421 } 422 423 show_stat("lu", 8, ipackets, link_layer|network_layer); 424 show_stat("lu", 5, ierrors, link_layer); 425 if (bflag) 426 show_stat("lu", 10, ibytes, link_layer|network_layer); 427 428 show_stat("lu", 8, opackets, link_layer|network_layer); 429 show_stat("lu", 5, oerrors, link_layer); 430 if (bflag) 431 show_stat("lu", 10, obytes, link_layer|network_layer); 432 433 show_stat("NRSlu", 5, collisions, link_layer); 434 if (tflag) 435 show_stat("LSd", 4, timer, link_layer); 436 if (dflag) 437 show_stat("LSd", 4, drops, link_layer); 438 putchar('\n'); 439 440 if (aflag && ifaddrfound) { 441 /* 442 * Print family's multicast addresses 443 */ 444 struct ifmultiaddr *multiaddr; 445 struct ifmultiaddr ifma; 446 union { 447 struct sockaddr sa; 448 struct sockaddr_in in; 449 #ifdef INET6 450 struct sockaddr_in6 in6; 451 #endif /* INET6 */ 452 struct sockaddr_dl dl; 453 } msa; 454 const char *fmt; 455 456 TAILQ_FOREACH(multiaddr, &ifnet.if_multiaddrs, ifma_link) { 457 if (kread((u_long)multiaddr, (char *)&ifma, 458 sizeof ifma)) 459 break; 460 multiaddr = &ifma; 461 if (kread((u_long)ifma.ifma_addr, (char *)&msa, 462 sizeof msa)) 463 break; 464 if (msa.sa.sa_family != sa->sa_family) 465 continue; 466 467 fmt = 0; 468 switch (msa.sa.sa_family) { 469 case AF_INET: 470 fmt = routename(msa.in.sin_addr.s_addr); 471 break; 472 #ifdef INET6 473 case AF_INET6: 474 printf("%*s %-19.19s(refs: %d)\n", 475 Wflag ? 27 : 25, "", 476 inet_ntop(AF_INET6, 477 &msa.in6.sin6_addr, 478 ntop_buf, 479 sizeof(ntop_buf)), 480 ifma.ifma_refcount); 481 break; 482 #endif /* INET6 */ 483 case AF_LINK: 484 switch (msa.dl.sdl_type) { 485 case IFT_ETHER: 486 case IFT_FDDI: 487 fmt = ether_ntoa( 488 (struct ether_addr *) 489 LLADDR(&msa.dl)); 490 break; 491 } 492 break; 493 } 494 if (fmt) { 495 printf("%*s %-17.17s", 496 Wflag ? 27 : 25, "", fmt); 497 if (msa.sa.sa_family == AF_LINK) { 498 printf(" %8lu", imcasts); 499 printf("%*s", 500 bflag ? 17 : 6, ""); 501 printf(" %8lu", omcasts); 502 } 503 putchar('\n'); 504 } 505 } 506 } 507 } 508 } 509 510 struct iftot { 511 SLIST_ENTRY(iftot) chain; 512 char ift_name[IFNAMSIZ]; /* interface name */ 513 u_long ift_ip; /* input packets */ 514 u_long ift_ie; /* input errors */ 515 u_long ift_op; /* output packets */ 516 u_long ift_oe; /* output errors */ 517 u_long ift_co; /* collisions */ 518 u_int ift_dr; /* drops */ 519 u_long ift_ib; /* input bytes */ 520 u_long ift_ob; /* output bytes */ 521 }; 522 523 u_char signalled; /* set if alarm goes off "early" */ 524 525 /* 526 * Print a running summary of interface statistics. 527 * Repeat display every interval1 seconds, showing statistics 528 * collected over that interval. Assumes that interval1 is non-zero. 529 * First line printed at top of screen is always cumulative. 530 * XXX - should be rewritten to use ifmib(4). 531 */ 532 static void 533 sidewaysintpr(int interval1, u_long off) 534 { 535 struct ifnet ifnet; 536 u_long firstifnet; 537 struct ifnethead ifnethead; 538 struct itimerval interval_it; 539 struct iftot *iftot, *ip, *ipn, *total, *sum, *interesting; 540 int line; 541 int oldmask, first; 542 u_long interesting_off; 543 544 if (kread(off, (char *)&ifnethead, sizeof ifnethead)) 545 return; 546 firstifnet = (u_long)TAILQ_FIRST(&ifnethead); 547 548 if ((iftot = malloc(sizeof(struct iftot))) == NULL) { 549 printf("malloc failed\n"); 550 exit(1); 551 } 552 memset(iftot, 0, sizeof(struct iftot)); 553 554 interesting = NULL; 555 interesting_off = 0; 556 for (off = firstifnet, ip = iftot; off;) { 557 char name[IFNAMSIZ]; 558 559 if (kread(off, (char *)&ifnet, sizeof ifnet)) 560 break; 561 strlcpy(name, ifnet.if_xname, sizeof(name)); 562 if (interface && strcmp(name, interface) == 0) { 563 interesting = ip; 564 interesting_off = off; 565 } 566 snprintf(ip->ift_name, sizeof(ip->ift_name), "(%s)", name);; 567 if ((ipn = malloc(sizeof(struct iftot))) == NULL) { 568 printf("malloc failed\n"); 569 exit(1); 570 } 571 memset(ipn, 0, sizeof(struct iftot)); 572 SLIST_NEXT(ip, chain) = ipn; 573 ip = ipn; 574 off = (u_long)TAILQ_NEXT(&ifnet, if_link); 575 } 576 if (interface && interesting == NULL) 577 errx(1, "%s: unknown interface", interface); 578 if ((total = malloc(sizeof(struct iftot))) == NULL) { 579 printf("malloc failed\n"); 580 exit(1); 581 } 582 memset(total, 0, sizeof(struct iftot)); 583 if ((sum = malloc(sizeof(struct iftot))) == NULL) { 584 printf("malloc failed\n"); 585 exit(1); 586 } 587 memset(sum, 0, sizeof(struct iftot)); 588 589 (void)signal(SIGALRM, catchalarm); 590 signalled = NO; 591 interval_it.it_interval.tv_sec = interval1; 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 first = 1; 596 banner: 597 printf("%17s %14s %16s", "input", 598 interesting ? interesting->ift_name : "(Total)", "output"); 599 putchar('\n'); 600 printf("%10s %5s %10s %10s %5s %10s %5s", 601 "packets", "errs", "bytes", "packets", "errs", "bytes", "colls"); 602 if (dflag) 603 printf(" %5.5s", "drops"); 604 putchar('\n'); 605 fflush(stdout); 606 line = 0; 607 loop: 608 if (interesting != NULL) { 609 ip = interesting; 610 if (kread(interesting_off, (char *)&ifnet, sizeof ifnet)) { 611 printf("???\n"); 612 exit(1); 613 }; 614 if (!first) { 615 show_stat("lu", 10, ifnet.if_ipackets - ip->ift_ip, 1); 616 show_stat("lu", 5, ifnet.if_ierrors - ip->ift_ie, 1); 617 show_stat("lu", 10, ifnet.if_ibytes - ip->ift_ib, 1); 618 show_stat("lu", 10, ifnet.if_opackets - ip->ift_op, 1); 619 show_stat("lu", 5, ifnet.if_oerrors - ip->ift_oe, 1); 620 show_stat("lu", 10, ifnet.if_obytes - ip->ift_ob, 1); 621 show_stat("NRSlu", 5, 622 ifnet.if_collisions - ip->ift_co, 1); 623 if (dflag) 624 show_stat("LSu", 5, 625 ifnet.if_snd.ifq_drops - ip->ift_dr, 1); 626 } 627 ip->ift_ip = ifnet.if_ipackets; 628 ip->ift_ie = ifnet.if_ierrors; 629 ip->ift_ib = ifnet.if_ibytes; 630 ip->ift_op = ifnet.if_opackets; 631 ip->ift_oe = ifnet.if_oerrors; 632 ip->ift_ob = ifnet.if_obytes; 633 ip->ift_co = ifnet.if_collisions; 634 ip->ift_dr = ifnet.if_snd.ifq_drops; 635 } else { 636 sum->ift_ip = 0; 637 sum->ift_ie = 0; 638 sum->ift_ib = 0; 639 sum->ift_op = 0; 640 sum->ift_oe = 0; 641 sum->ift_ob = 0; 642 sum->ift_co = 0; 643 sum->ift_dr = 0; 644 for (off = firstifnet, ip = iftot; 645 off && SLIST_NEXT(ip, chain) != NULL; 646 ip = SLIST_NEXT(ip, chain)) { 647 if (kread(off, (char *)&ifnet, sizeof ifnet)) { 648 off = 0; 649 continue; 650 } 651 sum->ift_ip += ifnet.if_ipackets; 652 sum->ift_ie += ifnet.if_ierrors; 653 sum->ift_ib += ifnet.if_ibytes; 654 sum->ift_op += ifnet.if_opackets; 655 sum->ift_oe += ifnet.if_oerrors; 656 sum->ift_ob += ifnet.if_obytes; 657 sum->ift_co += ifnet.if_collisions; 658 sum->ift_dr += ifnet.if_snd.ifq_drops; 659 off = (u_long)TAILQ_NEXT(&ifnet, if_link); 660 } 661 if (!first) { 662 show_stat("lu", 10, sum->ift_ip - total->ift_ip, 1); 663 show_stat("lu", 5, sum->ift_ie - total->ift_ie, 1); 664 show_stat("lu", 10, sum->ift_ib - total->ift_ib, 1); 665 show_stat("lu", 10, sum->ift_op - total->ift_op, 1); 666 show_stat("lu", 5, sum->ift_oe - total->ift_oe, 1); 667 show_stat("lu", 10, sum->ift_ob - total->ift_ob, 1); 668 show_stat("NRSlu", 5, sum->ift_co - total->ift_co, 1); 669 if (dflag) 670 show_stat("LSu", 5, 671 sum->ift_dr - total->ift_dr, 1); 672 } 673 *total = *sum; 674 } 675 if (!first) 676 putchar('\n'); 677 fflush(stdout); 678 oldmask = sigblock(sigmask(SIGALRM)); 679 while (!signalled) 680 sigpause(0); 681 signalled = NO; 682 sigsetmask(oldmask); 683 line++; 684 first = 0; 685 if (line == 21) 686 goto banner; 687 else 688 goto loop; 689 /*NOTREACHED*/ 690 } 691 692 /* 693 * Set a flag to indicate that a signal from the periodic itimer has been 694 * caught. 695 */ 696 static void 697 catchalarm(int signo __unused) 698 { 699 signalled = YES; 700 } 701