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/sysctl.h> 47 #include <sys/time.h> 48 49 #include <net/if.h> 50 #include <net/if_var.h> 51 #include <net/if_dl.h> 52 #include <net/if_types.h> 53 #include <net/ethernet.h> 54 #include <net/pfvar.h> 55 #include <net/if_pfsync.h> 56 #include <netinet/in.h> 57 #include <netinet/in_var.h> 58 #include <netipx/ipx.h> 59 #include <netipx/ipx_if.h> 60 #include <arpa/inet.h> 61 62 #include <err.h> 63 #include <errno.h> 64 #include <libutil.h> 65 #include <signal.h> 66 #include <stdint.h> 67 #include <stdio.h> 68 #include <stdlib.h> 69 #include <string.h> 70 #include <unistd.h> 71 72 #include "netstat.h" 73 74 #define YES 1 75 #define NO 0 76 77 static void sidewaysintpr (u_int, u_long); 78 static void catchalarm (int); 79 80 #ifdef INET6 81 static char ntop_buf[INET6_ADDRSTRLEN]; /* for inet_ntop() */ 82 #endif 83 84 /* 85 * Dump pfsync statistics structure. 86 */ 87 void 88 pfsync_stats(u_long off __unused, const char *name, int af1 __unused) 89 { 90 struct pfsyncstats pfsyncstat, zerostat; 91 size_t len = sizeof(struct pfsyncstats); 92 93 if (zflag) 94 memset(&zerostat, 0, len); 95 if (sysctlbyname("net.inet.pfsync.stats", &pfsyncstat, &len, 96 zflag ? &zerostat : NULL, zflag ? len : 0) < 0) { 97 if (errno != ENOENT) 98 warn("sysctl: net.inet.pfsync.stats"); 99 return; 100 } 101 102 printf("%s:\n", name); 103 104 #define p(f, m) if (pfsyncstat.f || sflag <= 1) \ 105 printf(m, (uintmax_t)pfsyncstat.f, plural(pfsyncstat.f)) 106 #define p2(f, m) if (pfsyncstat.f || sflag <= 1) \ 107 printf(m, (uintmax_t)pfsyncstat.f) 108 109 p(pfsyncs_ipackets, "\t%ju packet%s received (IPv4)\n"); 110 p(pfsyncs_ipackets6, "\t%ju packet%s received (IPv6)\n"); 111 p(pfsyncs_badif, "\t\t%ju packet%s discarded for bad interface\n"); 112 p(pfsyncs_badttl, "\t\t%ju packet%s discarded for bad ttl\n"); 113 p(pfsyncs_hdrops, "\t\t%ju packet%s shorter than header\n"); 114 p(pfsyncs_badver, "\t\t%ju packet%s discarded for bad version\n"); 115 p(pfsyncs_badauth, "\t\t%ju packet%s discarded for bad HMAC\n"); 116 p(pfsyncs_badact,"\t\t%ju packet%s discarded for bad action\n"); 117 p(pfsyncs_badlen, "\t\t%ju packet%s discarded for short packet\n"); 118 p(pfsyncs_badval, "\t\t%ju state%s discarded for bad values\n"); 119 p(pfsyncs_stale, "\t\t%ju stale state%s\n"); 120 p(pfsyncs_badstate, "\t\t%ju failed state lookup/insert%s\n"); 121 p(pfsyncs_opackets, "\t%ju packet%s sent (IPv4)\n"); 122 p(pfsyncs_opackets6, "\t%ju packet%s sent (IPv6)\n"); 123 p2(pfsyncs_onomem, "\t\t%ju send failed due to mbuf memory error\n"); 124 p2(pfsyncs_oerrors, "\t\t%ju send error\n"); 125 #undef p 126 #undef p2 127 } 128 129 /* 130 * Display a formatted value, or a '-' in the same space. 131 */ 132 static void 133 show_stat(const char *fmt, int width, u_long value, short showvalue) 134 { 135 const char *lsep, *rsep; 136 char newfmt[32]; 137 138 lsep = ""; 139 if (strncmp(fmt, "LS", 2) == 0) { 140 lsep = " "; 141 fmt += 2; 142 } 143 rsep = " "; 144 if (strncmp(fmt, "NRS", 3) == 0) { 145 rsep = ""; 146 fmt += 3; 147 } 148 if (showvalue == 0) { 149 /* Print just dash. */ 150 sprintf(newfmt, "%s%%%ds%s", lsep, width, rsep); 151 printf(newfmt, "-"); 152 return; 153 } 154 155 if (hflag) { 156 char buf[5]; 157 158 /* Format in human readable form. */ 159 humanize_number(buf, sizeof(buf), (int64_t)value, "", 160 HN_AUTOSCALE, HN_NOSPACE | HN_DECIMAL); 161 sprintf(newfmt, "%s%%%ds%s", lsep, width, rsep); 162 printf(newfmt, buf); 163 } else { 164 /* Construct the format string. */ 165 sprintf(newfmt, "%s%%%d%s%s", lsep, width, fmt, rsep); 166 printf(newfmt, value); 167 } 168 } 169 170 /* 171 * Print a description of the network interfaces. 172 */ 173 void 174 intpr(int _interval, u_long ifnetaddr, void (*pfunc)(char *)) 175 { 176 struct ifnet ifnet; 177 struct ifnethead ifnethead; 178 union { 179 struct ifaddr ifa; 180 struct in_ifaddr in; 181 #ifdef INET6 182 struct in6_ifaddr in6; 183 #endif 184 struct ipx_ifaddr ipx; 185 } ifaddr; 186 u_long ifaddraddr; 187 u_long ifaddrfound; 188 u_long ifnetfound; 189 u_long opackets; 190 u_long ipackets; 191 u_long obytes; 192 u_long ibytes; 193 u_long omcasts; 194 u_long imcasts; 195 u_long oerrors; 196 u_long ierrors; 197 u_long collisions; 198 short timer; 199 int drops; 200 struct sockaddr *sa = NULL; 201 char name[IFNAMSIZ]; 202 short network_layer; 203 short link_layer; 204 205 if (ifnetaddr == 0) { 206 printf("ifnet: symbol not defined\n"); 207 return; 208 } 209 if (_interval) { 210 sidewaysintpr((unsigned)_interval, ifnetaddr); 211 return; 212 } 213 if (kread(ifnetaddr, (char *)&ifnethead, sizeof ifnethead)) 214 return; 215 ifnetaddr = (u_long)TAILQ_FIRST(&ifnethead); 216 if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet)) 217 return; 218 219 if (!pfunc) { 220 if (Wflag) 221 printf("%-7.7s", "Name"); 222 else 223 printf("%-5.5s", "Name"); 224 printf(" %5.5s %-13.13s %-17.17s %8.8s %5.5s", 225 "Mtu", "Network", "Address", "Ipkts", "Ierrs"); 226 if (bflag) 227 printf(" %10.10s","Ibytes"); 228 printf(" %8.8s %5.5s", "Opkts", "Oerrs"); 229 if (bflag) 230 printf(" %10.10s","Obytes"); 231 printf(" %5s", "Coll"); 232 if (tflag) 233 printf(" %s", "Time"); 234 if (dflag) 235 printf(" %s", "Drop"); 236 putchar('\n'); 237 } 238 ifaddraddr = 0; 239 while (ifnetaddr || ifaddraddr) { 240 struct sockaddr_in *sockin; 241 #ifdef INET6 242 struct sockaddr_in6 *sockin6; 243 #endif 244 char *cp; 245 int n, m; 246 247 network_layer = 0; 248 link_layer = 0; 249 250 if (ifaddraddr == 0) { 251 ifnetfound = ifnetaddr; 252 if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet)) 253 return; 254 strlcpy(name, ifnet.if_xname, sizeof(name)); 255 ifnetaddr = (u_long)TAILQ_NEXT(&ifnet, if_link); 256 if (interface != 0 && (strcmp(name, interface) != 0)) 257 continue; 258 cp = index(name, '\0'); 259 260 if (pfunc) { 261 (*pfunc)(name); 262 continue; 263 } 264 265 if ((ifnet.if_flags&IFF_UP) == 0) 266 *cp++ = '*'; 267 *cp = '\0'; 268 ifaddraddr = (u_long)TAILQ_FIRST(&ifnet.if_addrhead); 269 } 270 ifaddrfound = ifaddraddr; 271 272 /* 273 * Get the interface stats. These may get 274 * overriden below on a per-interface basis. 275 */ 276 opackets = ifnet.if_opackets; 277 ipackets = ifnet.if_ipackets; 278 obytes = ifnet.if_obytes; 279 ibytes = ifnet.if_ibytes; 280 omcasts = ifnet.if_omcasts; 281 imcasts = ifnet.if_imcasts; 282 oerrors = ifnet.if_oerrors; 283 ierrors = ifnet.if_ierrors; 284 collisions = ifnet.if_collisions; 285 timer = ifnet.if_timer; 286 drops = ifnet.if_snd.ifq_drops; 287 288 if (ifaddraddr == 0) { 289 if (Wflag) 290 printf("%-7.7s", name); 291 else 292 printf("%-5.5s", name); 293 printf(" %5lu ", ifnet.if_mtu); 294 printf("%-13.13s ", "none"); 295 printf("%-17.17s ", "none"); 296 } else { 297 if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)) { 298 ifaddraddr = 0; 299 continue; 300 } 301 #define CP(x) ((char *)(x)) 302 cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) + 303 CP(&ifaddr); 304 sa = (struct sockaddr *)cp; 305 if (af != AF_UNSPEC && sa->sa_family != af) { 306 ifaddraddr = 307 (u_long)TAILQ_NEXT(&ifaddr.ifa, ifa_link); 308 continue; 309 } 310 if (Wflag) 311 printf("%-7.7s", name); 312 else 313 printf("%-5.5s", name); 314 printf(" %5lu ", ifnet.if_mtu); 315 switch (sa->sa_family) { 316 case AF_UNSPEC: 317 printf("%-13.13s ", "none"); 318 printf("%-15.15s ", "none"); 319 break; 320 case AF_INET: 321 sockin = (struct sockaddr_in *)sa; 322 #ifdef notdef 323 /* can't use inet_makeaddr because kernel 324 * keeps nets unshifted. 325 */ 326 in = inet_makeaddr(ifaddr.in.ia_subnet, 327 INADDR_ANY); 328 printf("%-13.13s ", netname(in.s_addr, 329 ifaddr.in.ia_subnetmask)); 330 #else 331 printf("%-13.13s ", 332 netname(htonl(ifaddr.in.ia_subnet), 333 ifaddr.in.ia_subnetmask)); 334 #endif 335 printf("%-17.17s ", 336 routename(sockin->sin_addr.s_addr)); 337 338 network_layer = 1; 339 break; 340 #ifdef INET6 341 case AF_INET6: 342 sockin6 = (struct sockaddr_in6 *)sa; 343 printf("%-13.13s ", 344 netname6(&ifaddr.in6.ia_addr, 345 &ifaddr.in6.ia_prefixmask.sin6_addr)); 346 printf("%-17.17s ", 347 inet_ntop(AF_INET6, 348 &sockin6->sin6_addr, 349 ntop_buf, sizeof(ntop_buf))); 350 351 network_layer = 1; 352 break; 353 #endif /*INET6*/ 354 case AF_IPX: 355 { 356 struct sockaddr_ipx *sipx = 357 (struct sockaddr_ipx *)sa; 358 u_long net; 359 char netnum[10]; 360 361 *(union ipx_net *) &net = sipx->sipx_addr.x_net; 362 sprintf(netnum, "%lx", (u_long)ntohl(net)); 363 printf("ipx:%-8s ", netnum); 364 /* printf("ipx:%-8s ", netname(net, 0L)); */ 365 printf("%-17s ", 366 ipx_phost((struct sockaddr *)sipx)); 367 } 368 369 network_layer = 1; 370 break; 371 372 case AF_APPLETALK: 373 printf("atalk:%-12.12s ",atalk_print(sa,0x10) ); 374 printf("%-11.11s ",atalk_print(sa,0x0b) ); 375 break; 376 case AF_LINK: 377 { 378 struct sockaddr_dl *sdl = 379 (struct sockaddr_dl *)sa; 380 char linknum[10]; 381 cp = (char *)LLADDR(sdl); 382 n = sdl->sdl_alen; 383 sprintf(linknum, "<Link#%d>", sdl->sdl_index); 384 m = printf("%-13.13s ", linknum); 385 } 386 goto hexprint; 387 default: 388 m = printf("(%d)", sa->sa_family); 389 for (cp = sa->sa_len + (char *)sa; 390 --cp > sa->sa_data && (*cp == 0);) {} 391 n = cp - sa->sa_data + 1; 392 cp = sa->sa_data; 393 hexprint: 394 while (--n >= 0) 395 m += printf("%02x%c", *cp++ & 0xff, 396 n > 0 ? ':' : ' '); 397 m = 32 - m; 398 while (m-- > 0) 399 putchar(' '); 400 401 link_layer = 1; 402 break; 403 } 404 405 /* 406 * Fixup the statistics for interfaces that 407 * update stats for their network addresses 408 */ 409 if (network_layer) { 410 opackets = ifaddr.in.ia_ifa.if_opackets; 411 ipackets = ifaddr.in.ia_ifa.if_ipackets; 412 obytes = ifaddr.in.ia_ifa.if_obytes; 413 ibytes = ifaddr.in.ia_ifa.if_ibytes; 414 } 415 416 ifaddraddr = (u_long)TAILQ_NEXT(&ifaddr.ifa, ifa_link); 417 } 418 419 show_stat("lu", 8, ipackets, link_layer|network_layer); 420 show_stat("lu", 5, ierrors, link_layer); 421 if (bflag) 422 show_stat("lu", 10, ibytes, link_layer|network_layer); 423 424 show_stat("lu", 8, opackets, link_layer|network_layer); 425 show_stat("lu", 5, oerrors, link_layer); 426 if (bflag) 427 show_stat("lu", 10, obytes, link_layer|network_layer); 428 429 show_stat("NRSlu", 5, collisions, link_layer); 430 if (tflag) 431 show_stat("LSd", 4, timer, link_layer); 432 if (dflag) 433 show_stat("LSd", 4, drops, link_layer); 434 putchar('\n'); 435 436 if (aflag && ifaddrfound) { 437 /* 438 * Print family's multicast addresses 439 */ 440 struct ifmultiaddr *multiaddr; 441 struct ifmultiaddr ifma; 442 union { 443 struct sockaddr sa; 444 struct sockaddr_in in; 445 #ifdef INET6 446 struct sockaddr_in6 in6; 447 #endif /* INET6 */ 448 struct sockaddr_dl dl; 449 } msa; 450 const char *fmt; 451 452 TAILQ_FOREACH(multiaddr, &ifnet.if_multiaddrs, ifma_link) { 453 if (kread((u_long)multiaddr, (char *)&ifma, 454 sizeof ifma)) 455 break; 456 multiaddr = &ifma; 457 if (kread((u_long)ifma.ifma_addr, (char *)&msa, 458 sizeof msa)) 459 break; 460 if (msa.sa.sa_family != sa->sa_family) 461 continue; 462 463 fmt = 0; 464 switch (msa.sa.sa_family) { 465 case AF_INET: 466 fmt = routename(msa.in.sin_addr.s_addr); 467 break; 468 #ifdef INET6 469 case AF_INET6: 470 printf("%*s %-19.19s(refs: %d)\n", 471 Wflag ? 27 : 25, "", 472 inet_ntop(AF_INET6, 473 &msa.in6.sin6_addr, 474 ntop_buf, 475 sizeof(ntop_buf)), 476 ifma.ifma_refcount); 477 break; 478 #endif /* INET6 */ 479 case AF_LINK: 480 switch (msa.dl.sdl_type) { 481 case IFT_ETHER: 482 case IFT_FDDI: 483 fmt = ether_ntoa( 484 (struct ether_addr *) 485 LLADDR(&msa.dl)); 486 break; 487 } 488 break; 489 } 490 if (fmt) { 491 printf("%*s %-17.17s", 492 Wflag ? 27 : 25, "", fmt); 493 if (msa.sa.sa_family == AF_LINK) { 494 printf(" %8lu", imcasts); 495 printf("%*s", 496 bflag ? 17 : 6, ""); 497 printf(" %8lu", omcasts); 498 } 499 putchar('\n'); 500 } 501 } 502 } 503 } 504 } 505 506 struct iftot { 507 SLIST_ENTRY(iftot) chain; 508 char ift_name[IFNAMSIZ]; /* interface name */ 509 u_long ift_ip; /* input packets */ 510 u_long ift_ie; /* input errors */ 511 u_long ift_op; /* output packets */ 512 u_long ift_oe; /* output errors */ 513 u_long ift_co; /* collisions */ 514 u_int ift_dr; /* drops */ 515 u_long ift_ib; /* input bytes */ 516 u_long ift_ob; /* output bytes */ 517 }; 518 519 u_char signalled; /* set if alarm goes off "early" */ 520 521 /* 522 * Print a running summary of interface statistics. 523 * Repeat display every interval seconds, showing statistics 524 * collected over that interval. Assumes that interval is non-zero. 525 * First line printed at top of screen is always cumulative. 526 * XXX - should be rewritten to use ifmib(4). 527 */ 528 static void 529 sidewaysintpr(unsigned interval1, u_long off) 530 { 531 struct ifnet ifnet; 532 u_long firstifnet; 533 struct ifnethead ifnethead; 534 struct iftot *iftot, *ip, *ipn, *total, *sum, *interesting; 535 int line; 536 int oldmask, first; 537 u_long interesting_off; 538 539 if (kread(off, (char *)&ifnethead, sizeof ifnethead)) 540 return; 541 firstifnet = (u_long)TAILQ_FIRST(&ifnethead); 542 543 if ((iftot = malloc(sizeof(struct iftot))) == NULL) { 544 printf("malloc failed\n"); 545 exit(1); 546 } 547 memset(iftot, 0, sizeof(struct iftot)); 548 549 interesting = NULL; 550 interesting_off = 0; 551 for (off = firstifnet, ip = iftot; off;) { 552 char name[IFNAMSIZ]; 553 554 if (kread(off, (char *)&ifnet, sizeof ifnet)) 555 break; 556 strlcpy(name, ifnet.if_xname, sizeof(name)); 557 if (interface && strcmp(name, interface) == 0) { 558 interesting = ip; 559 interesting_off = off; 560 } 561 snprintf(ip->ift_name, sizeof(ip->ift_name), "(%s)", name);; 562 if ((ipn = malloc(sizeof(struct iftot))) == NULL) { 563 printf("malloc failed\n"); 564 exit(1); 565 } 566 memset(ipn, 0, sizeof(struct iftot)); 567 SLIST_NEXT(ip, chain) = ipn; 568 ip = ipn; 569 off = (u_long)TAILQ_NEXT(&ifnet, if_link); 570 } 571 if (interface && interesting == NULL) 572 errx(1, "%s: unknown interface", interface); 573 if ((total = malloc(sizeof(struct iftot))) == NULL) { 574 printf("malloc failed\n"); 575 exit(1); 576 } 577 memset(total, 0, sizeof(struct iftot)); 578 if ((sum = malloc(sizeof(struct iftot))) == NULL) { 579 printf("malloc failed\n"); 580 exit(1); 581 } 582 memset(sum, 0, sizeof(struct iftot)); 583 584 (void)signal(SIGALRM, catchalarm); 585 signalled = NO; 586 (void)alarm(interval1); 587 first = 1; 588 banner: 589 printf("%17s %14s %16s", "input", 590 interesting ? interesting->ift_name : "(Total)", "output"); 591 putchar('\n'); 592 printf("%10s %5s %10s %10s %5s %10s %5s", 593 "packets", "errs", "bytes", "packets", "errs", "bytes", "colls"); 594 if (dflag) 595 printf(" %5.5s", "drops"); 596 putchar('\n'); 597 fflush(stdout); 598 line = 0; 599 loop: 600 if (interesting != NULL) { 601 ip = interesting; 602 if (kread(interesting_off, (char *)&ifnet, sizeof ifnet)) { 603 printf("???\n"); 604 exit(1); 605 }; 606 if (!first) { 607 show_stat("lu", 10, ifnet.if_ipackets - ip->ift_ip, 1); 608 show_stat("lu", 5, ifnet.if_ierrors - ip->ift_ie, 1); 609 show_stat("lu", 10, ifnet.if_ibytes - ip->ift_ib, 1); 610 show_stat("lu", 10, ifnet.if_opackets - ip->ift_op, 1); 611 show_stat("lu", 5, ifnet.if_oerrors - ip->ift_oe, 1); 612 show_stat("lu", 10, ifnet.if_obytes - ip->ift_ob, 1); 613 show_stat("NRSlu", 5, 614 ifnet.if_collisions - ip->ift_co, 1); 615 if (dflag) 616 show_stat("LSu", 5, 617 ifnet.if_snd.ifq_drops - ip->ift_dr, 1); 618 } 619 ip->ift_ip = ifnet.if_ipackets; 620 ip->ift_ie = ifnet.if_ierrors; 621 ip->ift_ib = ifnet.if_ibytes; 622 ip->ift_op = ifnet.if_opackets; 623 ip->ift_oe = ifnet.if_oerrors; 624 ip->ift_ob = ifnet.if_obytes; 625 ip->ift_co = ifnet.if_collisions; 626 ip->ift_dr = ifnet.if_snd.ifq_drops; 627 } else { 628 sum->ift_ip = 0; 629 sum->ift_ie = 0; 630 sum->ift_ib = 0; 631 sum->ift_op = 0; 632 sum->ift_oe = 0; 633 sum->ift_ob = 0; 634 sum->ift_co = 0; 635 sum->ift_dr = 0; 636 for (off = firstifnet, ip = iftot; 637 off && SLIST_NEXT(ip, chain) != NULL; 638 ip = SLIST_NEXT(ip, chain)) { 639 if (kread(off, (char *)&ifnet, sizeof ifnet)) { 640 off = 0; 641 continue; 642 } 643 sum->ift_ip += ifnet.if_ipackets; 644 sum->ift_ie += ifnet.if_ierrors; 645 sum->ift_ib += ifnet.if_ibytes; 646 sum->ift_op += ifnet.if_opackets; 647 sum->ift_oe += ifnet.if_oerrors; 648 sum->ift_ob += ifnet.if_obytes; 649 sum->ift_co += ifnet.if_collisions; 650 sum->ift_dr += ifnet.if_snd.ifq_drops; 651 off = (u_long)TAILQ_NEXT(&ifnet, if_link); 652 } 653 if (!first) { 654 show_stat("lu", 10, sum->ift_ip - total->ift_ip, 1); 655 show_stat("lu", 5, sum->ift_ie - total->ift_ie, 1); 656 show_stat("lu", 10, sum->ift_ib - total->ift_ib, 1); 657 show_stat("lu", 10, sum->ift_op - total->ift_op, 1); 658 show_stat("lu", 5, sum->ift_oe - total->ift_oe, 1); 659 show_stat("lu", 10, sum->ift_ob - total->ift_ob, 1); 660 show_stat("NRSlu", 5, sum->ift_co - total->ift_co, 1); 661 if (dflag) 662 show_stat("LSu", 5, 663 sum->ift_dr - total->ift_dr, 1); 664 } 665 *total = *sum; 666 } 667 if (!first) 668 putchar('\n'); 669 fflush(stdout); 670 oldmask = sigblock(sigmask(SIGALRM)); 671 if (! signalled) { 672 sigpause(0); 673 } 674 sigsetmask(oldmask); 675 signalled = NO; 676 (void)alarm(interval1); 677 line++; 678 first = 0; 679 if (line == 21) 680 goto banner; 681 else 682 goto loop; 683 /*NOTREACHED*/ 684 } 685 686 /* 687 * Called if an interval expires before sidewaysintpr has completed a loop. 688 * Sets a flag to not wait for the alarm. 689 */ 690 static void 691 catchalarm(int signo __unused) 692 { 693 signalled = YES; 694 } 695