usr.bin/netstat/if.c

   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. 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  * @(#)if.c     8.3 (Berkeley) 4/28/95
  30  * $FreeBSD: src/usr.bin/netstat/if.c,v 1.32.2.9 2001/09/17 14:35:46 ru Exp $
  31  */
  32
  33 #define _KERNEL_STRUCTURES
  34 #include <sys/param.h>
  35 #include <sys/protosw.h>
  36 #include <sys/socket.h>
  37 #include <sys/sysctl.h>
  38 #include <sys/time.h>
  39
  40 #include <net/if.h>
  41 #include <net/if_var.h>
  42 #include <net/if_dl.h>
  43 #include <net/if_types.h>
  44 #include <net/ethernet.h>
  45 #include <netinet/in.h>
  46 #include <netinet/in_var.h>
  47 #include <arpa/inet.h>
  48
  49 #include <libutil.h>
  50 #include <signal.h>
  51 #include <stdio.h>
  52 #include <stdlib.h>
  53 #include <string.h>
  54 #include <unistd.h>
  55
  56 #include "netstat.h"
  57
  58 #define YES     1
  59 #define NO      0
  60
  61 static void sidewaysintpr (u_int, u_long, int);
  62 static void catchalarm (int);
  63
  64 #ifdef INET6
  65 static char ntop_buf[INET6_ADDRSTRLEN];         /* for inet_ntop() */
  66 #endif
  67
  68
  69 /*
  70  * Display a formatted value, or a '-' in the same space.
  71  */
  72 static void
  73 show_stat(const char *fmt, int width, u_long value, short showvalue)
  74 {
  75         char newfmt[32];
  76
  77         if (! showvalue) {
  78                 /* no value, just the dash */
  79                 sprintf(newfmt, "%%%ds", width);
  80                 printf(newfmt, "-");
  81                 return;
  82         }
  83
  84         if (hflag) {            /* human-readable */
  85                 char buf[5];
  86                 humanize_number(buf, sizeof buf, (int64_t) value, "",
  87                                 HN_AUTOSCALE,
  88                                 HN_NOSPACE | HN_DECIMAL);
  89                 sprintf(newfmt, "%%%ds", width);
  90                 printf(newfmt, buf);
  91         } else {
  92                 sprintf(newfmt, "%%%d%s", width, fmt);
  93                 printf(newfmt, value);
  94         }
  95 }
  96
  97
  98
  99 /*
 100  * Print a description of the network interfaces.
 101  */
 102 void
 103 intpr(int interval1, u_long ifnetaddr, void (*pfunc)(char *), u_long ncpusaddr)
 104 {
 105         struct ifnet ifnet;
 106         struct ifdata_pcpu ifdata;
 107         struct ifaddr_container ifac;
 108         struct ifnethead ifnethead;
 109         union {
 110                 struct ifaddr ifa;
 111                 struct in_ifaddr in;
 112 #ifdef INET6
 113                 struct in6_ifaddr in6;
 114 #endif
 115         } ifaddr;
 116         u_long ifaddraddr;
 117         u_long ifaddrcont_addr;
 118         u_long ifaddrfound;
 119         u_long ifdataaddr;
 120         u_long opackets;
 121         u_long ipackets;
 122         u_long obytes;
 123         u_long ibytes;
 124         u_long oerrors;
 125         u_long ierrors;
 126         u_long collisions;
 127         short timer;
 128         int drops;
 129         struct sockaddr *sa = NULL;
 130         char name[IFNAMSIZ];
 131         short network_layer;
 132         short link_layer;
 133         int ncpus;
 134
 135         if (kread(ncpusaddr, (char *)&ncpus, sizeof(ncpus)))
 136                 return;
 137
 138         if (ifnetaddr == 0) {
 139                 printf("ifnet: symbol not defined\n");
 140                 return;
 141         }
 142         if (interval1) {
 143                 sidewaysintpr((unsigned)interval1, ifnetaddr, ncpus);
 144                 return;
 145         }
 146         if (kread(ifnetaddr, (char *)&ifnethead, sizeof ifnethead))
 147                 return;
 148         ifnetaddr = (u_long)TAILQ_FIRST(&ifnethead);
 149         if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet))
 150                 return;
 151
 152         if (!pfunc) {
 153                 printf("%-7.7s %-5.5s %-13.13s %-15.15s %8.8s %5.5s",
 154                        "Name", "Mtu", "Network", "Address", "Ipkts", "Ierrs");
 155                 if (bflag)
 156                         printf(" %10.10s","Ibytes");
 157                 printf(" %8.8s %5.5s", "Opkts", "Oerrs");
 158                 if (bflag)
 159                         printf(" %10.10s","Obytes");
 160                 printf(" %5s", "Coll");
 161                 if (tflag)
 162                         printf(" %s", "Time");
 163                 if (dflag)
 164                         printf(" %s", "Drop");
 165                 putchar('\n');
 166         }
 167         ifaddraddr = 0;
 168         ifaddrcont_addr = 0;
 169         while (ifnetaddr || ifaddraddr) {
 170                 struct sockaddr_in *sin;
 171 #ifdef INET6
 172                 struct sockaddr_in6 *sin6;
 173 #endif
 174                 char *cp;
 175                 int n, m, cpu;
 176
 177                 network_layer = 0;
 178                 link_layer = 0;
 179
 180                 if (ifaddraddr == 0) {
 181                         struct ifaddrhead head;
 182
 183                         if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet))
 184                                 return;
 185                         strlcpy(name, ifnet.if_xname, sizeof(name));
 186                         ifnetaddr = (u_long)TAILQ_NEXT(&ifnet, if_link);
 187                         if (interface != 0 && (strcmp(name, interface) != 0))
 188                                 continue;
 189                         cp = strchr(name, '\0');
 190
 191                         if (pfunc) {
 192                                 (*pfunc)(name);
 193                                 continue;
 194                         }
 195
 196                         if ((ifnet.if_flags&IFF_UP) == 0)
 197                                 *cp++ = '*';
 198                         *cp = '\0';
 199
 200                         if (kread((u_long)ifnet.if_addrheads,
 201                                   (char *)&head, sizeof(head)))
 202                                 return;
 203
 204                         ifaddrcont_addr =
 205                                 (u_long)TAILQ_FIRST(&head);
 206                         if (ifaddrcont_addr == 0) {
 207                                 ifaddraddr = 0;
 208                         } else {
 209                                 if (kread(ifaddrcont_addr, (char *)&ifac,
 210                                           sizeof(ifac)))
 211                                         return;
 212                                 ifaddraddr = (u_long)ifac.ifa;
 213                         }
 214                 }
 215                 ifaddrfound = ifaddraddr;
 216
 217                 /*
 218                  * Get the interface stats.  These may get
 219                  * overriden below on a per-interface basis.
 220                  */
 221                 ifdataaddr = (u_long)ifnet.if_data_pcpu;
 222                 if (kread(ifdataaddr, (char *)&ifdata, sizeof(ifdata)))
 223                         return;
 224                 opackets = ifdata.ifd_opackets;
 225                 ipackets = ifdata.ifd_ipackets;
 226                 obytes = ifdata.ifd_obytes;
 227                 ibytes = ifdata.ifd_ibytes;
 228                 oerrors = ifdata.ifd_oerrors;
 229                 ierrors = ifdata.ifd_ierrors;
 230                 collisions = ifdata.ifd_collisions;
 231
 232                 for (cpu = 1; cpu < ncpus; ++cpu) {
 233                         if (kread(ifdataaddr + (cpu * sizeof(ifdata)),
 234                             (char *)&ifdata, sizeof(ifdata)))
 235                                 return;
 236                         opackets += ifdata.ifd_opackets;
 237                         ipackets += ifdata.ifd_ipackets;
 238                         obytes += ifdata.ifd_obytes;
 239                         ibytes += ifdata.ifd_ibytes;
 240                         oerrors += ifdata.ifd_oerrors;
 241                         ierrors += ifdata.ifd_ierrors;
 242                         collisions += ifdata.ifd_collisions;
 243                 }
 244
 245                 timer = ifnet.if_timer;
 246                 drops = 0;
 247
 248                 if (ifaddraddr == 0) {
 249                         printf("%-7.7s %-5lu ", name, ifnet.if_mtu);
 250                         printf("%-13.13s ", "none");
 251                         printf("%-15.15s ", "none");
 252                 } else {
 253                         if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)) {
 254                                 ifaddraddr = 0;
 255                                 continue;
 256                         }
 257
 258                         ifaddr.ifa.if_ipackets = ifac.ifa_ipackets;
 259                         ifaddr.ifa.if_ibytes = ifac.ifa_ibytes;
 260                         ifaddr.ifa.if_opackets = ifac.ifa_opackets;
 261                         ifaddr.ifa.if_obytes = ifac.ifa_obytes;
 262                         for (cpu = 1; cpu < ncpus; ++cpu) {
 263                                 struct ifaddr_container nifac;
 264
 265                                 if (kread(ifaddrcont_addr +
 266                                     (cpu * sizeof(nifac)),
 267                                     (char *)&nifac, sizeof(nifac))) {
 268                                         ifaddraddr = 0;
 269                                         continue;
 270                                 }
 271                                 ifaddr.ifa.if_ipackets += nifac.ifa_ipackets;
 272                                 ifaddr.ifa.if_ibytes += nifac.ifa_ibytes;
 273                                 ifaddr.ifa.if_opackets += nifac.ifa_opackets;
 274                                 ifaddr.ifa.if_obytes += nifac.ifa_obytes;
 275                         }
 276
 277 #define CP(x) ((char *)(x))
 278                         cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) +
 279                                 CP(&ifaddr);
 280                         sa = (struct sockaddr *)cp;
 281                         if (af != AF_UNSPEC && sa->sa_family != af) {
 282                                 ifaddrcont_addr =
 283                                         (u_long)TAILQ_NEXT(&ifac, ifa_link);
 284                                 if (ifaddrcont_addr == 0) {
 285                                         ifaddraddr = 0;
 286                                 } else {
 287                                         if (kread(ifaddrcont_addr,
 288                                             (char *)&ifac, sizeof(ifac))) {
 289                                                 ifaddraddr = 0;
 290                                                 continue;
 291                                         }
 292                                         ifaddraddr = (u_long)ifac.ifa;
 293                                 }
 294                                 continue;
 295                         }
 296                         printf("%-7.7s %-5lu ", name, ifnet.if_mtu);
 297                         switch (sa->sa_family) {
 298                         case AF_UNSPEC:
 299                                 printf("%-13.13s ", "none");
 300                                 printf("%-15.15s ", "none");
 301                                 break;
 302                         case AF_INET:
 303                                 sin = (struct sockaddr_in *)sa;
 304 #ifdef notdef
 305                                 /* can't use inet_makeaddr because kernel
 306                                  * keeps nets unshifted.
 307                                  */
 308                                 in = inet_makeaddr(ifaddr.in.ia_subnet,
 309                                         INADDR_ANY);
 310                                 printf("%-13.13s ", netname(in.s_addr,
 311                                     ifaddr.in.ia_subnetmask));
 312 #else
 313                                 printf("%-13.13s ",
 314                                     netname(htonl(ifaddr.in.ia_subnet),
 315                                     ifaddr.in.ia_subnetmask));
 316 #endif
 317                                 printf("%-15.15s ",
 318                                     routename(sin->sin_addr.s_addr));
 319
 320                                 network_layer = 1;
 321                                 break;
 322 #ifdef INET6
 323                         case AF_INET6:
 324                                 sin6 = (struct sockaddr_in6 *)sa;
 325                                 printf("%-11.11s ",
 326                                        netname6(&ifaddr.in6.ia_addr,
 327                                                 &ifaddr.in6.ia_prefixmask.sin6_addr));
 328                                 printf("%-17.17s ",
 329                                     inet_ntop(AF_INET6,
 330                                         &sin6->sin6_addr,
 331                                         ntop_buf, sizeof(ntop_buf)));
 332
 333                                 network_layer = 1;
 334                                 break;
 335 #endif /*INET6*/
 336                         case AF_LINK:
 337                                 {
 338                                 struct sockaddr_dl *sdl =
 339                                         (struct sockaddr_dl *)sa;
 340                                 char linknum[10];
 341                                 cp = (char *)LLADDR(sdl);
 342                                 n = sdl->sdl_alen;
 343                                 sprintf(linknum, "<Link#%d>", sdl->sdl_index);
 344                                 m = printf("%-11.11s ", linknum);
 345                                 }
 346                                 goto hexprint;
 347                         default:
 348                                 m = printf("(%d)", sa->sa_family);
 349                                 for (cp = sa->sa_len + (char *)sa;
 350                                         --cp > sa->sa_data && (*cp == 0);) {}
 351                                 n = cp - sa->sa_data + 1;
 352                                 cp = sa->sa_data;
 353                         hexprint:
 354                                 while (--n >= 0)
 355                                         m += printf("%02x%c", *cp++ & 0xff,
 356                                                     n > 0 ? ':' : ' ');
 357                                 m = 30 - m;
 358                                 while (m-- > 0)
 359                                         putchar(' ');
 360
 361                                 link_layer = 1;
 362                                 break;
 363                         }
 364
 365                         /*
 366                          * Fixup the statistics for interfaces that
 367                          * update stats for their network addresses
 368                          */
 369                         if (network_layer) {
 370                                 opackets = ifaddr.ifa.if_opackets;
 371                                 ipackets = ifaddr.ifa.if_ipackets;
 372                                 obytes = ifaddr.ifa.if_obytes;
 373                                 ibytes = ifaddr.ifa.if_ibytes;
 374                         }
 375
 376                         ifaddrcont_addr =
 377                                 (u_long)TAILQ_NEXT(&ifac, ifa_link);
 378                         if (ifaddrcont_addr == 0) {
 379                                 ifaddraddr = 0;
 380                         } else {
 381                                 if (kread(ifaddrcont_addr,
 382                                     (char *)&ifac, sizeof(ifac))) {
 383                                         ifaddraddr = 0;
 384                                 } else {
 385                                         ifaddraddr = (u_long)ifac.ifa;
 386                                 }
 387                         }
 388                 }
 389
 390                 show_stat("lu", 8, ipackets, link_layer|network_layer);
 391                 printf(" ");
 392                 show_stat("lu", 5, ierrors, link_layer);
 393                 printf(" ");
 394                 if (bflag) {
 395                         show_stat("lu", 10, ibytes, link_layer|network_layer);
 396                         printf(" ");
 397                 }
 398                 show_stat("lu", 8, opackets, link_layer|network_layer);
 399                 printf(" ");
 400                 show_stat("lu", 5, oerrors, link_layer);
 401                 printf(" ");
 402                 if (bflag) {
 403                         show_stat("lu", 10, obytes, link_layer|network_layer);
 404                         printf(" ");
 405                 }
 406                 show_stat("lu", 5, collisions, link_layer);
 407                 if (tflag) {
 408                         printf(" ");
 409                         show_stat("d", 3, timer, link_layer);
 410                 }
 411                 if (dflag) {
 412                         printf(" ");
 413                         show_stat("d", 3, drops, link_layer);
 414                 }
 415                 putchar('\n');
 416                 if (aflag && ifaddrfound) {
 417                         /*
 418                          * Print family's multicast addresses
 419                          */
 420                         struct ifmultiaddr *multiaddr;
 421                         struct ifmultiaddr ifma;
 422                         union {
 423                                 struct sockaddr sa;
 424                                 struct sockaddr_in in;
 425 #ifdef INET6
 426                                 struct sockaddr_in6 in6;
 427 #endif /* INET6 */
 428                                 struct sockaddr_dl dl;
 429                         } msa;
 430                         const char *fmt;
 431
 432                         TAILQ_FOREACH(multiaddr, &ifnet.if_multiaddrs, ifma_link) {
 433                                 if (kread((u_long)multiaddr, (char *)&ifma,
 434                                           sizeof ifma))
 435                                         break;
 436                                 multiaddr = &ifma;
 437                                 if (kread((u_long)ifma.ifma_addr, (char *)&msa,
 438                                           sizeof msa))
 439                                         break;
 440                                 if (msa.sa.sa_family != sa->sa_family)
 441                                         continue;
 442
 443                                 fmt = NULL;
 444                                 switch (msa.sa.sa_family) {
 445                                 case AF_INET:
 446                                         fmt = routename(msa.in.sin_addr.s_addr);
 447                                         break;
 448 #ifdef INET6
 449                                 case AF_INET6:
 450                                         printf("%23s %-19.19s(refs: %d)\n", "",
 451                                                inet_ntop(AF_INET6,
 452                                                          &msa.in6.sin6_addr,
 453                                                          ntop_buf,
 454                                                          sizeof(ntop_buf)),
 455                                                ifma.ifma_refcount);
 456                                         break;
 457 #endif /* INET6 */
 458                                 case AF_LINK:
 459                                         switch (msa.dl.sdl_type) {
 460                                         case IFT_ETHER:
 461                                         case IFT_FDDI:
 462                                                 fmt = ether_ntoa(
 463                                                         (struct ether_addr *)
 464                                                         LLADDR(&msa.dl));
 465                                                 break;
 466                                         }
 467                                         break;
 468                                 }
 469                                 if (fmt)
 470                                         printf("%23s %s\n", "", fmt);
 471                         }
 472                 }
 473         }
 474 }
 475
 476 struct  iftot {
 477         SLIST_ENTRY(iftot) chain;
 478         char    ift_name[IFNAMSIZ];     /* interface name */
 479         u_long  ift_ip;                 /* input packets */
 480         u_long  ift_ie;                 /* input errors */
 481         u_long  ift_op;                 /* output packets */
 482         u_long  ift_oe;                 /* output errors */
 483         u_long  ift_co;                 /* collisions */
 484         u_int   ift_dr;                 /* drops */
 485         u_long  ift_ib;                 /* input bytes */
 486         u_long  ift_ob;                 /* output bytes */
 487 };
 488
 489 u_char  signalled;                      /* set if alarm goes off "early" */
 490
 491 /*
 492  * Print a running summary of interface statistics.
 493  * Repeat display every interval1 seconds, showing statistics
 494  * collected over that interval.  Assumes that interval1 is non-zero.
 495  * First line printed at top of screen is always cumulative.
 496  * XXX - should be rewritten to use ifmib(4).
 497  */
 498 static void
 499 sidewaysintpr(unsigned interval1, u_long off, int ncpus)
 500 {
 501         struct ifnet ifnet;
 502         u_long firstifnet;
 503         struct ifnethead ifnethead;
 504         struct ifdata_pcpu ifdata;
 505         struct iftot *iftot, *ip, *ipn, *total, *sum, *interesting;
 506         int line, cpu;
 507         int oldmask, first;
 508         u_long interesting_off;
 509         u_long ifdata_addr;
 510
 511         if (kread(off, (char *)&ifnethead, sizeof ifnethead))
 512                 return;
 513         firstifnet = (u_long)TAILQ_FIRST(&ifnethead);
 514
 515         if ((iftot = malloc(sizeof(struct iftot))) == NULL) {
 516                 printf("malloc failed\n");
 517                 exit(1);
 518         }
 519         memset(iftot, 0, sizeof(struct iftot));
 520
 521         interesting = NULL;
 522         interesting_off = 0;
 523         for (off = firstifnet, ip = iftot; off;) {
 524                 char name[IFNAMSIZ];
 525
 526                 if (kread(off, (char *)&ifnet, sizeof ifnet))
 527                         break;
 528                 strlcpy(name, ifnet.if_xname, sizeof(name));
 529                 if (interface && strcmp(name, interface) == 0) {
 530                         interesting = ip;
 531                         interesting_off = off;
 532                 }
 533                 snprintf(ip->ift_name, 16, "(%s)", name);
 534                 if ((ipn = malloc(sizeof(struct iftot))) == NULL) {
 535                         printf("malloc failed\n");
 536                         exit(1);
 537                 }
 538                 memset(ipn, 0, sizeof(struct iftot));
 539                 SLIST_NEXT(ip, chain) = ipn;
 540                 ip = ipn;
 541                 off = (u_long)TAILQ_NEXT(&ifnet, if_link);
 542         }
 543         if ((total = malloc(sizeof(struct iftot))) == NULL) {
 544                 printf("malloc failed\n");
 545                 exit(1);
 546         }
 547         memset(total, 0, sizeof(struct iftot));
 548         if ((sum = malloc(sizeof(struct iftot))) == NULL) {
 549                 printf("malloc failed\n");
 550                 exit(1);
 551         }
 552         memset(sum, 0, sizeof(struct iftot));
 553
 554
 555         (void)signal(SIGALRM, catchalarm);
 556         signalled = NO;
 557         (void)alarm(interval1);
 558         first = 1;
 559 banner:
 560         printf("%17s %14s %16s", "input",
 561             interesting ? interesting->ift_name : "(Total)", "output");
 562         putchar('\n');
 563         printf("%10s %5s %10s %10s %5s %10s %5s",
 564             "packets", "errs", "bytes", "packets", "errs", "bytes", "colls");
 565         if (dflag)
 566                 printf(" %5.5s", "drops");
 567         putchar('\n');
 568         fflush(stdout);
 569         line = 0;
 570 loop:
 571         if (interesting != NULL) {
 572                 ip = interesting;
 573                 if (kread(interesting_off, (char *)&ifnet, sizeof ifnet)) {
 574                         printf("???\n");
 575                         exit(1);
 576                 }
 577
 578                 ifdata_addr = (u_long)ifnet.if_data_pcpu;
 579                 if (kread(ifdata_addr, (char *)&ifdata, sizeof(ifdata))) {
 580                         printf("ifdata 1\n");
 581                         exit(1);
 582                 }
 583                 ifnet.if_ipackets = ifdata.ifd_ipackets;
 584                 ifnet.if_ierrors = ifdata.ifd_ierrors;
 585                 ifnet.if_ibytes = ifdata.ifd_ibytes;
 586                 ifnet.if_opackets = ifdata.ifd_opackets;
 587                 ifnet.if_oerrors = ifdata.ifd_oerrors;
 588                 ifnet.if_obytes = ifdata.ifd_obytes;
 589                 ifnet.if_collisions = ifdata.ifd_collisions;
 590
 591                 for (cpu = 1; cpu < ncpus; ++cpu) {
 592                         if (kread(ifdata_addr + (cpu * sizeof(ifdata)),
 593                             (char *)&ifdata, sizeof(ifdata))) {
 594                                 printf("ifdata 2\n");
 595                                 exit(1);
 596                         }
 597                         ifnet.if_ipackets += ifdata.ifd_ipackets;
 598                         ifnet.if_ierrors += ifdata.ifd_ierrors;
 599                         ifnet.if_ibytes += ifdata.ifd_ibytes;
 600                         ifnet.if_opackets += ifdata.ifd_opackets;
 601                         ifnet.if_oerrors += ifdata.ifd_oerrors;
 602                         ifnet.if_obytes += ifdata.ifd_obytes;
 603                         ifnet.if_collisions += ifdata.ifd_collisions;
 604                 }
 605
 606                 if (!first) {
 607                         printf("%10lu %5lu %10lu %10lu %5lu %10lu %5lu",
 608                                 ifnet.if_ipackets - ip->ift_ip,
 609                                 ifnet.if_ierrors - ip->ift_ie,
 610                                 ifnet.if_ibytes - ip->ift_ib,
 611                                 ifnet.if_opackets - ip->ift_op,
 612                                 ifnet.if_oerrors - ip->ift_oe,
 613                                 ifnet.if_obytes - ip->ift_ob,
 614                                 ifnet.if_collisions - ip->ift_co);
 615                         if (dflag)
 616                                 printf(" %5u", 0 - ip->ift_dr);
 617                 }
 618                 ip->ift_ip = ifnet.if_ipackets;
 619                 ip->ift_ie = ifnet.if_ierrors;
 620                 ip->ift_ib = ifnet.if_ibytes;
 621                 ip->ift_op = ifnet.if_opackets;
 622                 ip->ift_oe = ifnet.if_oerrors;
 623                 ip->ift_ob = ifnet.if_obytes;
 624                 ip->ift_co = ifnet.if_collisions;
 625                 ip->ift_dr = 0;
 626         } else {
 627                 sum->ift_ip = 0;
 628                 sum->ift_ie = 0;
 629                 sum->ift_ib = 0;
 630                 sum->ift_op = 0;
 631                 sum->ift_oe = 0;
 632                 sum->ift_ob = 0;
 633                 sum->ift_co = 0;
 634                 sum->ift_dr = 0;
 635                 for (off = firstifnet, ip = iftot;
 636                      off && SLIST_NEXT(ip, chain) != NULL;
 637                      ip = SLIST_NEXT(ip, chain)) {
 638                         if (kread(off, (char *)&ifnet, sizeof ifnet)) {
 639                                 off = 0;
 640                                 continue;
 641                         }
 642
 643                         ifdata_addr = (u_long)ifnet.if_data_pcpu;
 644                         if (kread(ifdata_addr, (char *)&ifdata,
 645                             sizeof(ifdata))) {
 646                                 printf("ifdata 3\n");
 647                                 exit(1);
 648                         }
 649                         ifnet.if_ipackets = ifdata.ifd_ipackets;
 650                         ifnet.if_ierrors = ifdata.ifd_ierrors;
 651                         ifnet.if_ibytes = ifdata.ifd_ibytes;
 652                         ifnet.if_opackets = ifdata.ifd_opackets;
 653                         ifnet.if_oerrors = ifdata.ifd_oerrors;
 654                         ifnet.if_obytes = ifdata.ifd_obytes;
 655                         ifnet.if_collisions = ifdata.ifd_collisions;
 656
 657                         for (cpu = 1; cpu < ncpus; ++cpu) {
 658                                 if (kread(ifdata_addr + (cpu * sizeof(ifdata)),
 659                                     (char *)&ifdata, sizeof(ifdata))) {
 660                                         printf("ifdata 2\n");
 661                                         exit(1);
 662                                 }
 663                                 ifnet.if_ipackets += ifdata.ifd_ipackets;
 664                                 ifnet.if_ierrors += ifdata.ifd_ierrors;
 665                                 ifnet.if_ibytes += ifdata.ifd_ibytes;
 666                                 ifnet.if_opackets += ifdata.ifd_opackets;
 667                                 ifnet.if_oerrors += ifdata.ifd_oerrors;
 668                                 ifnet.if_obytes += ifdata.ifd_obytes;
 669                                 ifnet.if_collisions += ifdata.ifd_collisions;
 670                         }
 671
 672                         /*
 673                          * Don't double-count interfaces that are associated
 674                          * with bridges, they will be rolled up by the
 675                          * bridge.  Errors and collisions are not rolled up.
 676                          */
 677                         if (ifnet.if_bridge) {
 678                                 sum->ift_ie += ifnet.if_ierrors;
 679                                 sum->ift_oe += ifnet.if_oerrors;
 680                                 sum->ift_co += ifnet.if_collisions;
 681                         } else {
 682                                 sum->ift_ip += ifnet.if_ipackets;
 683                                 sum->ift_ie += ifnet.if_ierrors;
 684                                 sum->ift_ib += ifnet.if_ibytes;
 685                                 sum->ift_op += ifnet.if_opackets;
 686                                 sum->ift_oe += ifnet.if_oerrors;
 687                                 sum->ift_ob += ifnet.if_obytes;
 688                                 sum->ift_co += ifnet.if_collisions;
 689                                 sum->ift_dr += 0;
 690                         }
 691                         off = (u_long)TAILQ_NEXT(&ifnet, if_link);
 692                 }
 693                 if (!first) {
 694                         /* %10lu %5lu %10lu %10lu %5lu %10lu %5lu */
 695                         show_stat("lu", 10,   sum->ift_ip - total->ift_ip, 1);
 696                         show_stat("lu",  5+1, sum->ift_ie - total->ift_ie, 1);
 697                         show_stat("lu", 10+1, sum->ift_ib - total->ift_ib, 1);
 698                         show_stat("lu", 10+1, sum->ift_op - total->ift_op, 1);
 699                         show_stat("lu",  5+1, sum->ift_oe - total->ift_oe, 1);
 700                         show_stat("lu", 10+1, sum->ift_ob - total->ift_ob, 1);
 701                         show_stat("lu",  5+1, sum->ift_co - total->ift_co, 1);
 702                         if (dflag)
 703                                 show_stat("u", 5+1, sum->ift_dr - total->ift_dr, 1);
 704                 }
 705                 *total = *sum;
 706         }
 707         if (!first)
 708                 putchar('\n');
 709         fflush(stdout);
 710         oldmask = sigblock(sigmask(SIGALRM));
 711         if (! signalled) {
 712                 sigpause(0);
 713         }
 714         sigsetmask(oldmask);
 715         signalled = NO;
 716         (void)alarm(interval1);
 717         line++;
 718         first = 0;
 719         if (line == 21)
 720                 goto banner;
 721         else
 722                 goto loop;
 723         /*NOTREACHED*/
 724 }
 725
 726 /*
 727  * Called if an interval expires before sidewaysintpr has completed a loop.
 728  * Sets a flag to not wait for the alarm.
 729  */
 730 static void
 731 catchalarm(int signo __unused)
 732 {
 733         signalled = YES;
 734 }