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 <netproto/ipx/ipx.h>
  48 #include <netproto/ipx/ipx_if.h>
  49 #ifdef ISO
  50 #include <netiso/iso.h>
  51 #include <netiso/iso_var.h>
  52 #endif
  53 #include <arpa/inet.h>
  54
  55 #include <signal.h>
  56 #include <stdio.h>
  57 #include <stdlib.h>
  58 #include <string.h>
  59 #include <unistd.h>
  60
  61 #include "netstat.h"
  62
  63 #define YES     1
  64 #define NO      0
  65
  66 static void sidewaysintpr (u_int, u_long, int);
  67 static void catchalarm (int);
  68
  69 #ifdef INET6
  70 static char ntop_buf[INET6_ADDRSTRLEN];         /* for inet_ntop() */
  71 #endif
  72
  73
  74 /*
  75  * Display a formatted value, or a '-' in the same space.
  76  */
  77 static void
  78 show_stat(const char *fmt, int width, u_long value, short showvalue)
  79 {
  80         char newfmt[32];
  81
  82         /* Construct the format string */
  83         if (showvalue) {
  84                 sprintf(newfmt, "%%%d%s", width, fmt);
  85                 printf(newfmt, value);
  86         } else {
  87                 sprintf(newfmt, "%%%ds", width);
  88                 printf(newfmt, "-");
  89         }
  90 }
  91
  92
  93
  94 /*
  95  * Print a description of the network interfaces.
  96  */
  97 void
  98 intpr(int interval1, u_long ifnetaddr, void (*pfunc)(char *), u_long ncpusaddr)
  99 {
 100         struct ifnet ifnet;
 101         struct ifdata_pcpu ifdata;
 102         struct ifaddr_container ifac;
 103         struct ifnethead ifnethead;
 104         union {
 105                 struct ifaddr ifa;
 106                 struct in_ifaddr in;
 107 #ifdef INET6
 108                 struct in6_ifaddr in6;
 109 #endif
 110                 struct ipx_ifaddr ipx;
 111 #ifdef ISO
 112                 struct iso_ifaddr iso;
 113 #endif
 114         } ifaddr;
 115         u_long ifaddraddr;
 116         u_long ifaddrcont_addr;
 117         u_long ifaddrfound;
 118         u_long ifdataaddr;
 119         u_long opackets;
 120         u_long ipackets;
 121         u_long obytes;
 122         u_long ibytes;
 123         u_long oerrors;
 124         u_long ierrors;
 125         u_long collisions;
 126         short timer;
 127         int drops;
 128         struct sockaddr *sa = NULL;
 129         char name[IFNAMSIZ];
 130         short network_layer;
 131         short link_layer;
 132         int ncpus;
 133
 134         if (kread(ncpusaddr, (char *)&ncpus, sizeof(ncpus)))
 135                 return;
 136
 137         if (ifnetaddr == 0) {
 138                 printf("ifnet: symbol not defined\n");
 139                 return;
 140         }
 141         if (interval1) {
 142                 sidewaysintpr((unsigned)interval1, ifnetaddr, ncpus);
 143                 return;
 144         }
 145         if (kread(ifnetaddr, (char *)&ifnethead, sizeof ifnethead))
 146                 return;
 147         ifnetaddr = (u_long)TAILQ_FIRST(&ifnethead);
 148         if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet))
 149                 return;
 150
 151         if (!pfunc) {
 152                 printf("%-7.7s %-5.5s %-13.13s %-15.15s %8.8s %5.5s",
 153                        "Name", "Mtu", "Network", "Address", "Ipkts", "Ierrs");
 154                 if (bflag)
 155                         printf(" %10.10s","Ibytes");
 156                 printf(" %8.8s %5.5s", "Opkts", "Oerrs");
 157                 if (bflag)
 158                         printf(" %10.10s","Obytes");
 159                 printf(" %5s", "Coll");
 160                 if (tflag)
 161                         printf(" %s", "Time");
 162                 if (dflag)
 163                         printf(" %s", "Drop");
 164                 putchar('\n');
 165         }
 166         ifaddraddr = 0;
 167         ifaddrcont_addr = 0;
 168         while (ifnetaddr || ifaddraddr) {
 169                 struct sockaddr_in *sin;
 170 #ifdef INET6
 171                 struct sockaddr_in6 *sin6;
 172 #endif
 173                 char *cp;
 174                 int n, m, cpu;
 175
 176                 network_layer = 0;
 177                 link_layer = 0;
 178
 179                 if (ifaddraddr == 0) {
 180                         struct ifaddrhead head;
 181
 182                         if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet))
 183                                 return;
 184                         strlcpy(name, ifnet.if_xname, sizeof(name));
 185                         ifnetaddr = (u_long)TAILQ_NEXT(&ifnet, if_link);
 186                         if (interface != 0 && (strcmp(name, interface) != 0))
 187                                 continue;
 188                         cp = strchr(name, '\0');
 189
 190                         if (pfunc) {
 191                                 (*pfunc)(name);
 192                                 continue;
 193                         }
 194
 195                         if ((ifnet.if_flags&IFF_UP) == 0)
 196                                 *cp++ = '*';
 197                         *cp = '\0';
 198
 199                         if (kread((u_long)ifnet.if_addrheads,
 200                                   (char *)&head, sizeof(head)))
 201                                 return;
 202
 203                         ifaddrcont_addr =
 204                                 (u_long)TAILQ_FIRST(&head);
 205                         if (ifaddrcont_addr == 0) {
 206                                 ifaddraddr = 0;
 207                         } else {
 208                                 if (kread(ifaddrcont_addr, (char *)&ifac,
 209                                           sizeof(ifac)))
 210                                         return;
 211                                 ifaddraddr = (u_long)ifac.ifa;
 212                         }
 213                 }
 214                 ifaddrfound = ifaddraddr;
 215
 216                 /*
 217                  * Get the interface stats.  These may get
 218                  * overriden below on a per-interface basis.
 219                  */
 220                 ifdataaddr = (u_long)ifnet.if_data_pcpu;
 221                 if (kread(ifdataaddr, (char *)&ifdata, sizeof(ifdata)))
 222                         return;
 223                 opackets = ifdata.ifd_opackets;
 224                 ipackets = ifdata.ifd_ipackets;
 225                 obytes = ifdata.ifd_obytes;
 226                 ibytes = ifdata.ifd_ibytes;
 227                 oerrors = ifdata.ifd_oerrors;
 228                 ierrors = ifdata.ifd_ierrors;
 229                 collisions = ifdata.ifd_collisions;
 230
 231                 for (cpu = 1; cpu < ncpus; ++cpu) {
 232                         if (kread(ifdataaddr + (cpu * sizeof(ifdata)),
 233                             (char *)&ifdata, sizeof(ifdata)))
 234                                 return;
 235                         opackets += ifdata.ifd_opackets;
 236                         ipackets += ifdata.ifd_ipackets;
 237                         obytes += ifdata.ifd_obytes;
 238                         ibytes += ifdata.ifd_ibytes;
 239                         oerrors += ifdata.ifd_oerrors;
 240                         ierrors += ifdata.ifd_ierrors;
 241                         collisions += ifdata.ifd_collisions;
 242                 }
 243
 244                 timer = ifnet.if_timer;
 245                 drops = 0;
 246
 247                 if (ifaddraddr == 0) {
 248                         printf("%-7.7s %-5lu ", name, ifnet.if_mtu);
 249                         printf("%-13.13s ", "none");
 250                         printf("%-15.15s ", "none");
 251                 } else {
 252                         if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)) {
 253                                 ifaddraddr = 0;
 254                                 continue;
 255                         }
 256
 257                         ifaddr.ifa.if_ipackets = ifac.ifa_ipackets;
 258                         ifaddr.ifa.if_ibytes = ifac.ifa_ibytes;
 259                         ifaddr.ifa.if_opackets = ifac.ifa_opackets;
 260                         ifaddr.ifa.if_obytes = ifac.ifa_obytes;
 261                         for (cpu = 1; cpu < ncpus; ++cpu) {
 262                                 struct ifaddr_container nifac;
 263
 264                                 if (kread(ifaddrcont_addr +
 265                                     (cpu * sizeof(nifac)),
 266                                     (char *)&nifac, sizeof(nifac))) {
 267                                         ifaddraddr = 0;
 268                                         continue;
 269                                 }
 270                                 ifaddr.ifa.if_ipackets += nifac.ifa_ipackets;
 271                                 ifaddr.ifa.if_ibytes += nifac.ifa_ibytes;
 272                                 ifaddr.ifa.if_opackets += nifac.ifa_opackets;
 273                                 ifaddr.ifa.if_obytes += nifac.ifa_obytes;
 274                         }
 275
 276 #define CP(x) ((char *)(x))
 277                         cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) +
 278                                 CP(&ifaddr);
 279                         sa = (struct sockaddr *)cp;
 280                         if (af != AF_UNSPEC && sa->sa_family != af) {
 281                                 ifaddrcont_addr =
 282                                         (u_long)TAILQ_NEXT(&ifac, ifa_link);
 283                                 if (ifaddrcont_addr == 0) {
 284                                         ifaddraddr = 0;
 285                                 } else {
 286                                         if (kread(ifaddrcont_addr,
 287                                             (char *)&ifac, sizeof(ifac))) {
 288                                                 ifaddraddr = 0;
 289                                                 continue;
 290                                         }
 291                                         ifaddraddr = (u_long)ifac.ifa;
 292                                 }
 293                                 continue;
 294                         }
 295                         printf("%-7.7s %-5lu ", name, ifnet.if_mtu);
 296                         switch (sa->sa_family) {
 297                         case AF_UNSPEC:
 298                                 printf("%-13.13s ", "none");
 299                                 printf("%-15.15s ", "none");
 300                                 break;
 301                         case AF_INET:
 302                                 sin = (struct sockaddr_in *)sa;
 303 #ifdef notdef
 304                                 /* can't use inet_makeaddr because kernel
 305                                  * keeps nets unshifted.
 306                                  */
 307                                 in = inet_makeaddr(ifaddr.in.ia_subnet,
 308                                         INADDR_ANY);
 309                                 printf("%-13.13s ", netname(in.s_addr,
 310                                     ifaddr.in.ia_subnetmask));
 311 #else
 312                                 printf("%-13.13s ",
 313                                     netname(htonl(ifaddr.in.ia_subnet),
 314                                     ifaddr.in.ia_subnetmask));
 315 #endif
 316                                 printf("%-15.15s ",
 317                                     routename(sin->sin_addr.s_addr));
 318
 319                                 network_layer = 1;
 320                                 break;
 321 #ifdef INET6
 322                         case AF_INET6:
 323                                 sin6 = (struct sockaddr_in6 *)sa;
 324                                 printf("%-11.11s ",
 325                                        netname6(&ifaddr.in6.ia_addr,
 326                                                 &ifaddr.in6.ia_prefixmask.sin6_addr));
 327                                 printf("%-17.17s ",
 328                                     inet_ntop(AF_INET6,
 329                                         &sin6->sin6_addr,
 330                                         ntop_buf, sizeof(ntop_buf)));
 331
 332                                 network_layer = 1;
 333                                 break;
 334 #endif /*INET6*/
 335                         case AF_IPX:
 336                                 {
 337                                 struct sockaddr_ipx *sipx =
 338                                         (struct sockaddr_ipx *)sa;
 339                                 u_long net;
 340                                 char netnum[10];
 341
 342                                 *(union ipx_net *) &net = sipx->sipx_addr.x_net;
 343                                 sprintf(netnum, "%lx", (u_long)ntohl(net));
 344                                 printf("ipx:%-8s  ", netnum);
 345 /*                              printf("ipx:%-8s ", netname(net, 0L)); */
 346                                 printf("%-15s ",
 347                                     ipx_phost((struct sockaddr *)sipx));
 348                                 }
 349                                 break;
 350
 351                         case AF_LINK:
 352                                 {
 353                                 struct sockaddr_dl *sdl =
 354                                         (struct sockaddr_dl *)sa;
 355                                 char linknum[10];
 356                                 cp = (char *)LLADDR(sdl);
 357                                 n = sdl->sdl_alen;
 358                                 sprintf(linknum, "<Link#%d>", sdl->sdl_index);
 359                                 m = printf("%-11.11s ", linknum);
 360                                 }
 361                                 goto hexprint;
 362                         default:
 363                                 m = printf("(%d)", sa->sa_family);
 364                                 for (cp = sa->sa_len + (char *)sa;
 365                                         --cp > sa->sa_data && (*cp == 0);) {}
 366                                 n = cp - sa->sa_data + 1;
 367                                 cp = sa->sa_data;
 368                         hexprint:
 369                                 while (--n >= 0)
 370                                         m += printf("%02x%c", *cp++ & 0xff,
 371                                                     n > 0 ? ':' : ' ');
 372                                 m = 30 - m;
 373                                 while (m-- > 0)
 374                                         putchar(' ');
 375
 376                                 link_layer = 1;
 377                                 break;
 378                         }
 379
 380                         /*
 381                          * Fixup the statistics for interfaces that
 382                          * update stats for their network addresses
 383                          */
 384                         if (network_layer) {
 385                                 opackets = ifaddr.ifa.if_opackets;
 386                                 ipackets = ifaddr.ifa.if_ipackets;
 387                                 obytes = ifaddr.ifa.if_obytes;
 388                                 ibytes = ifaddr.ifa.if_ibytes;
 389                         }
 390
 391                         ifaddrcont_addr =
 392                                 (u_long)TAILQ_NEXT(&ifac, ifa_link);
 393                         if (ifaddrcont_addr == 0) {
 394                                 ifaddraddr = 0;
 395                         } else {
 396                                 if (kread(ifaddrcont_addr,
 397                                     (char *)&ifac, sizeof(ifac))) {
 398                                         ifaddraddr = 0;
 399                                 } else {
 400                                         ifaddraddr = (u_long)ifac.ifa;
 401                                 }
 402                         }
 403                 }
 404
 405                 show_stat("lu", 8, ipackets, link_layer|network_layer);
 406                 printf(" ");
 407                 show_stat("lu", 5, ierrors, link_layer);
 408                 printf(" ");
 409                 if (bflag) {
 410                         show_stat("lu", 10, ibytes, link_layer|network_layer);
 411                         printf(" ");
 412                 }
 413                 show_stat("lu", 8, opackets, link_layer|network_layer);
 414                 printf(" ");
 415                 show_stat("lu", 5, oerrors, link_layer);
 416                 printf(" ");
 417                 if (bflag) {
 418                         show_stat("lu", 10, obytes, link_layer|network_layer);
 419                         printf(" ");
 420                 }
 421                 show_stat("lu", 5, collisions, link_layer);
 422                 if (tflag) {
 423                         printf(" ");
 424                         show_stat("d", 3, timer, link_layer);
 425                 }
 426                 if (dflag) {
 427                         printf(" ");
 428                         show_stat("d", 3, drops, link_layer);
 429                 }
 430                 putchar('\n');
 431                 if (aflag && ifaddrfound) {
 432                         /*
 433                          * Print family's multicast addresses
 434                          */
 435                         struct ifmultiaddr *multiaddr;
 436                         struct ifmultiaddr ifma;
 437                         union {
 438                                 struct sockaddr sa;
 439                                 struct sockaddr_in in;
 440 #ifdef INET6
 441                                 struct sockaddr_in6 in6;
 442 #endif /* INET6 */
 443                                 struct sockaddr_dl dl;
 444                         } msa;
 445                         const char *fmt;
 446
 447                         TAILQ_FOREACH(multiaddr, &ifnet.if_multiaddrs, ifma_link) {
 448                                 if (kread((u_long)multiaddr, (char *)&ifma,
 449                                           sizeof ifma))
 450                                         break;
 451                                 multiaddr = &ifma;
 452                                 if (kread((u_long)ifma.ifma_addr, (char *)&msa,
 453                                           sizeof msa))
 454                                         break;
 455                                 if (msa.sa.sa_family != sa->sa_family)
 456                                         continue;
 457
 458                                 fmt = NULL;
 459                                 switch (msa.sa.sa_family) {
 460                                 case AF_INET:
 461                                         fmt = routename(msa.in.sin_addr.s_addr);
 462                                         break;
 463 #ifdef INET6
 464                                 case AF_INET6:
 465                                         printf("%23s %-19.19s(refs: %d)\n", "",
 466                                                inet_ntop(AF_INET6,
 467                                                          &msa.in6.sin6_addr,
 468                                                          ntop_buf,
 469                                                          sizeof(ntop_buf)),
 470                                                ifma.ifma_refcount);
 471                                         break;
 472 #endif /* INET6 */
 473                                 case AF_LINK:
 474                                         switch (msa.dl.sdl_type) {
 475                                         case IFT_ETHER:
 476                                         case IFT_FDDI:
 477                                                 fmt = ether_ntoa(
 478                                                         (struct ether_addr *)
 479                                                         LLADDR(&msa.dl));
 480                                                 break;
 481                                         }
 482                                         break;
 483                                 }
 484                                 if (fmt)
 485                                         printf("%23s %s\n", "", fmt);
 486                         }
 487                 }
 488         }
 489 }
 490
 491 struct  iftot {
 492         SLIST_ENTRY(iftot) chain;
 493         char    ift_name[IFNAMSIZ];     /* interface name */
 494         u_long  ift_ip;                 /* input packets */
 495         u_long  ift_ie;                 /* input errors */
 496         u_long  ift_op;                 /* output packets */
 497         u_long  ift_oe;                 /* output errors */
 498         u_long  ift_co;                 /* collisions */
 499         u_int   ift_dr;                 /* drops */
 500         u_long  ift_ib;                 /* input bytes */
 501         u_long  ift_ob;                 /* output bytes */
 502 };
 503
 504 u_char  signalled;                      /* set if alarm goes off "early" */
 505
 506 /*
 507  * Print a running summary of interface statistics.
 508  * Repeat display every interval1 seconds, showing statistics
 509  * collected over that interval.  Assumes that interval1 is non-zero.
 510  * First line printed at top of screen is always cumulative.
 511  * XXX - should be rewritten to use ifmib(4).
 512  */
 513 static void
 514 sidewaysintpr(unsigned interval1, u_long off, int ncpus)
 515 {
 516         struct ifnet ifnet;
 517         u_long firstifnet;
 518         struct ifnethead ifnethead;
 519         struct ifdata_pcpu ifdata;
 520         struct iftot *iftot, *ip, *ipn, *total, *sum, *interesting;
 521         int line, cpu;
 522         int oldmask, first;
 523         u_long interesting_off;
 524         u_long ifdata_addr;
 525
 526         if (kread(off, (char *)&ifnethead, sizeof ifnethead))
 527                 return;
 528         firstifnet = (u_long)TAILQ_FIRST(&ifnethead);
 529
 530         if ((iftot = malloc(sizeof(struct iftot))) == NULL) {
 531                 printf("malloc failed\n");
 532                 exit(1);
 533         }
 534         memset(iftot, 0, sizeof(struct iftot));
 535
 536         interesting = NULL;
 537         interesting_off = 0;
 538         for (off = firstifnet, ip = iftot; off;) {
 539                 char name[IFNAMSIZ];
 540
 541                 if (kread(off, (char *)&ifnet, sizeof ifnet))
 542                         break;
 543                 strlcpy(name, ifnet.if_xname, sizeof(name));
 544                 if (interface && strcmp(name, interface) == 0) {
 545                         interesting = ip;
 546                         interesting_off = off;
 547                 }
 548                 snprintf(ip->ift_name, 16, "(%s)", name);
 549                 if ((ipn = malloc(sizeof(struct iftot))) == NULL) {
 550                         printf("malloc failed\n");
 551                         exit(1);
 552                 }
 553                 memset(ipn, 0, sizeof(struct iftot));
 554                 SLIST_NEXT(ip, chain) = ipn;
 555                 ip = ipn;
 556                 off = (u_long)TAILQ_NEXT(&ifnet, if_link);
 557         }
 558         if ((total = malloc(sizeof(struct iftot))) == NULL) {
 559                 printf("malloc failed\n");
 560                 exit(1);
 561         }
 562         memset(total, 0, sizeof(struct iftot));
 563         if ((sum = malloc(sizeof(struct iftot))) == NULL) {
 564                 printf("malloc failed\n");
 565                 exit(1);
 566         }
 567         memset(sum, 0, sizeof(struct iftot));
 568
 569
 570         (void)signal(SIGALRM, catchalarm);
 571         signalled = NO;
 572         (void)alarm(interval1);
 573         first = 1;
 574 banner:
 575         printf("%17s %14s %16s", "input",
 576             interesting ? interesting->ift_name : "(Total)", "output");
 577         putchar('\n');
 578         printf("%10s %5s %10s %10s %5s %10s %5s",
 579             "packets", "errs", "bytes", "packets", "errs", "bytes", "colls");
 580         if (dflag)
 581                 printf(" %5.5s", "drops");
 582         putchar('\n');
 583         fflush(stdout);
 584         line = 0;
 585 loop:
 586         if (interesting != NULL) {
 587                 ip = interesting;
 588                 if (kread(interesting_off, (char *)&ifnet, sizeof ifnet)) {
 589                         printf("???\n");
 590                         exit(1);
 591                 }
 592
 593                 ifdata_addr = (u_long)ifnet.if_data_pcpu;
 594                 if (kread(ifdata_addr, (char *)&ifdata, sizeof(ifdata))) {
 595                         printf("ifdata 1\n");
 596                         exit(1);
 597                 }
 598                 ifnet.if_ipackets = ifdata.ifd_ipackets;
 599                 ifnet.if_ierrors = ifdata.ifd_ierrors;
 600                 ifnet.if_ibytes = ifdata.ifd_ibytes;
 601                 ifnet.if_opackets = ifdata.ifd_opackets;
 602                 ifnet.if_oerrors = ifdata.ifd_oerrors;
 603                 ifnet.if_obytes = ifdata.ifd_obytes;
 604                 ifnet.if_collisions = ifdata.ifd_collisions;
 605
 606                 for (cpu = 1; cpu < ncpus; ++cpu) {
 607                         if (kread(ifdata_addr + (cpu * sizeof(ifdata)),
 608                             (char *)&ifdata, sizeof(ifdata))) {
 609                                 printf("ifdata 2\n");
 610                                 exit(1);
 611                         }
 612                         ifnet.if_ipackets += ifdata.ifd_ipackets;
 613                         ifnet.if_ierrors += ifdata.ifd_ierrors;
 614                         ifnet.if_ibytes += ifdata.ifd_ibytes;
 615                         ifnet.if_opackets += ifdata.ifd_opackets;
 616                         ifnet.if_oerrors += ifdata.ifd_oerrors;
 617                         ifnet.if_obytes += ifdata.ifd_obytes;
 618                         ifnet.if_collisions += ifdata.ifd_collisions;
 619                 }
 620
 621                 if (!first) {
 622                         printf("%10lu %5lu %10lu %10lu %5lu %10lu %5lu",
 623                                 ifnet.if_ipackets - ip->ift_ip,
 624                                 ifnet.if_ierrors - ip->ift_ie,
 625                                 ifnet.if_ibytes - ip->ift_ib,
 626                                 ifnet.if_opackets - ip->ift_op,
 627                                 ifnet.if_oerrors - ip->ift_oe,
 628                                 ifnet.if_obytes - ip->ift_ob,
 629                                 ifnet.if_collisions - ip->ift_co);
 630                         if (dflag)
 631                                 printf(" %5u", 0 - ip->ift_dr);
 632                 }
 633                 ip->ift_ip = ifnet.if_ipackets;
 634                 ip->ift_ie = ifnet.if_ierrors;
 635                 ip->ift_ib = ifnet.if_ibytes;
 636                 ip->ift_op = ifnet.if_opackets;
 637                 ip->ift_oe = ifnet.if_oerrors;
 638                 ip->ift_ob = ifnet.if_obytes;
 639                 ip->ift_co = ifnet.if_collisions;
 640                 ip->ift_dr = 0;
 641         } else {
 642                 sum->ift_ip = 0;
 643                 sum->ift_ie = 0;
 644                 sum->ift_ib = 0;
 645                 sum->ift_op = 0;
 646                 sum->ift_oe = 0;
 647                 sum->ift_ob = 0;
 648                 sum->ift_co = 0;
 649                 sum->ift_dr = 0;
 650                 for (off = firstifnet, ip = iftot;
 651                      off && SLIST_NEXT(ip, chain) != NULL;
 652                      ip = SLIST_NEXT(ip, chain)) {
 653                         if (kread(off, (char *)&ifnet, sizeof ifnet)) {
 654                                 off = 0;
 655                                 continue;
 656                         }
 657
 658                         ifdata_addr = (u_long)ifnet.if_data_pcpu;
 659                         if (kread(ifdata_addr, (char *)&ifdata,
 660                             sizeof(ifdata))) {
 661                                 printf("ifdata 3\n");
 662                                 exit(1);
 663                         }
 664                         ifnet.if_ipackets = ifdata.ifd_ipackets;
 665                         ifnet.if_ierrors = ifdata.ifd_ierrors;
 666                         ifnet.if_ibytes = ifdata.ifd_ibytes;
 667                         ifnet.if_opackets = ifdata.ifd_opackets;
 668                         ifnet.if_oerrors = ifdata.ifd_oerrors;
 669                         ifnet.if_obytes = ifdata.ifd_obytes;
 670                         ifnet.if_collisions = ifdata.ifd_collisions;
 671
 672                         for (cpu = 1; cpu < ncpus; ++cpu) {
 673                                 if (kread(ifdata_addr + (cpu * sizeof(ifdata)),
 674                                     (char *)&ifdata, sizeof(ifdata))) {
 675                                         printf("ifdata 2\n");
 676                                         exit(1);
 677                                 }
 678                                 ifnet.if_ipackets += ifdata.ifd_ipackets;
 679                                 ifnet.if_ierrors += ifdata.ifd_ierrors;
 680                                 ifnet.if_ibytes += ifdata.ifd_ibytes;
 681                                 ifnet.if_opackets += ifdata.ifd_opackets;
 682                                 ifnet.if_oerrors += ifdata.ifd_oerrors;
 683                                 ifnet.if_obytes += ifdata.ifd_obytes;
 684                                 ifnet.if_collisions += ifdata.ifd_collisions;
 685                         }
 686
 687                         sum->ift_ip += ifnet.if_ipackets;
 688                         sum->ift_ie += ifnet.if_ierrors;
 689                         sum->ift_ib += ifnet.if_ibytes;
 690                         sum->ift_op += ifnet.if_opackets;
 691                         sum->ift_oe += ifnet.if_oerrors;
 692                         sum->ift_ob += ifnet.if_obytes;
 693                         sum->ift_co += ifnet.if_collisions;
 694                         sum->ift_dr += 0;
 695                         off = (u_long)TAILQ_NEXT(&ifnet, if_link);
 696                 }
 697                 if (!first) {
 698                         printf("%10lu %5lu %10lu %10lu %5lu %10lu %5lu",
 699                                 sum->ift_ip - total->ift_ip,
 700                                 sum->ift_ie - total->ift_ie,
 701                                 sum->ift_ib - total->ift_ib,
 702                                 sum->ift_op - total->ift_op,
 703                                 sum->ift_oe - total->ift_oe,
 704                                 sum->ift_ob - total->ift_ob,
 705                                 sum->ift_co - total->ift_co);
 706                         if (dflag)
 707                                 printf(" %5u", sum->ift_dr - total->ift_dr);
 708                 }
 709                 *total = *sum;
 710         }
 711         if (!first)
 712                 putchar('\n');
 713         fflush(stdout);
 714         oldmask = sigblock(sigmask(SIGALRM));
 715         if (! signalled) {
 716                 sigpause(0);
 717         }
 718         sigsetmask(oldmask);
 719         signalled = NO;
 720         (void)alarm(interval1);
 721         line++;
 722         first = 0;
 723         if (line == 21)
 724                 goto banner;
 725         else
 726                 goto loop;
 727         /*NOTREACHED*/
 728 }
 729
 730 /*
 731  * Called if an interval expires before sidewaysintpr has completed a loop.
 732  * Sets a flag to not wait for the alarm.
 733  */
 734 static void
 735 catchalarm(int signo __unused)
 736 {
 737         signalled = YES;
 738 }