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 #ifdef ISO
  48 #include <netiso/iso.h>
  49 #include <netiso/iso_var.h>
  50 #endif
  51 #include <arpa/inet.h>
  52
  53 #include <libutil.h>
  54 #include <signal.h>
  55 #include <stdio.h>
  56 #include <stdlib.h>
  57 #include <string.h>
  58 #include <unistd.h>
  59
  60 #include "netstat.h"
  61
  62 #define YES     1
  63 #define NO      0
  64
  65 static void sidewaysintpr (u_int, u_long, int);
  66 static void catchalarm (int);
  67
  68 #ifdef INET6
  69 static char ntop_buf[INET6_ADDRSTRLEN];         /* for inet_ntop() */
  70 #endif
  71
  72
  73 /*
  74  * Display a formatted value, or a '-' in the same space.
  75  */
  76 static void
  77 show_stat(const char *fmt, int width, u_long value, short showvalue)
  78 {
  79         char newfmt[32];
  80
  81         if (! showvalue) {
  82                 /* no value, just the dash */
  83                 sprintf(newfmt, "%%%ds", width);
  84                 printf(newfmt, "-");
  85                 return;
  86         }
  87
  88         if (hflag) {            /* human-readable */
  89                 char buf[5];
  90                 humanize_number(buf, sizeof buf, (int64_t) value, "",
  91                                 HN_AUTOSCALE,
  92                                 HN_NOSPACE | HN_DECIMAL);
  93                 sprintf(newfmt, "%%%ds", width);
  94                 printf(newfmt, buf);
  95         } else {
  96                 sprintf(newfmt, "%%%d%s", width, fmt);
  97                 printf(newfmt, value);
  98         }
  99 }
 100
 101
 102
 103 /*
 104  * Print a description of the network interfaces.
 105  */
 106 void
 107 intpr(int interval1, u_long ifnetaddr, void (*pfunc)(char *), u_long ncpusaddr)
 108 {
 109         struct ifnet ifnet;
 110         struct ifdata_pcpu ifdata;
 111         struct ifaddr_container ifac;
 112         struct ifnethead ifnethead;
 113         union {
 114                 struct ifaddr ifa;
 115                 struct in_ifaddr in;
 116 #ifdef INET6
 117                 struct in6_ifaddr in6;
 118 #endif
 119 #ifdef ISO
 120                 struct iso_ifaddr iso;
 121 #endif
 122         } ifaddr;
 123         u_long ifaddraddr;
 124         u_long ifaddrcont_addr;
 125         u_long ifaddrfound;
 126         u_long ifdataaddr;
 127         u_long opackets;
 128         u_long ipackets;
 129         u_long obytes;
 130         u_long ibytes;
 131         u_long oerrors;
 132         u_long ierrors;
 133         u_long collisions;
 134         short timer;
 135         int drops;
 136         struct sockaddr *sa = NULL;
 137         char name[IFNAMSIZ];
 138         short network_layer;
 139         short link_layer;
 140         int ncpus;
 141
 142         if (kread(ncpusaddr, (char *)&ncpus, sizeof(ncpus)))
 143                 return;
 144
 145         if (ifnetaddr == 0) {
 146                 printf("ifnet: symbol not defined\n");
 147                 return;
 148         }
 149         if (interval1) {
 150                 sidewaysintpr((unsigned)interval1, ifnetaddr, ncpus);
 151                 return;
 152         }
 153         if (kread(ifnetaddr, (char *)&ifnethead, sizeof ifnethead))
 154                 return;
 155         ifnetaddr = (u_long)TAILQ_FIRST(&ifnethead);
 156         if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet))
 157                 return;
 158
 159         if (!pfunc) {
 160                 printf("%-7.7s %-5.5s %-13.13s %-15.15s %8.8s %5.5s",
 161                        "Name", "Mtu", "Network", "Address", "Ipkts", "Ierrs");
 162                 if (bflag)
 163                         printf(" %10.10s","Ibytes");
 164                 printf(" %8.8s %5.5s", "Opkts", "Oerrs");
 165                 if (bflag)
 166                         printf(" %10.10s","Obytes");
 167                 printf(" %5s", "Coll");
 168                 if (tflag)
 169                         printf(" %s", "Time");
 170                 if (dflag)
 171                         printf(" %s", "Drop");
 172                 putchar('\n');
 173         }
 174         ifaddraddr = 0;
 175         ifaddrcont_addr = 0;
 176         while (ifnetaddr || ifaddraddr) {
 177                 struct sockaddr_in *sin;
 178 #ifdef INET6
 179                 struct sockaddr_in6 *sin6;
 180 #endif
 181                 char *cp;
 182                 int n, m, cpu;
 183
 184                 network_layer = 0;
 185                 link_layer = 0;
 186
 187                 if (ifaddraddr == 0) {
 188                         struct ifaddrhead head;
 189
 190                         if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet))
 191                                 return;
 192                         strlcpy(name, ifnet.if_xname, sizeof(name));
 193                         ifnetaddr = (u_long)TAILQ_NEXT(&ifnet, if_link);
 194                         if (interface != 0 && (strcmp(name, interface) != 0))
 195                                 continue;
 196                         cp = strchr(name, '\0');
 197
 198                         if (pfunc) {
 199                                 (*pfunc)(name);
 200                                 continue;
 201                         }
 202
 203                         if ((ifnet.if_flags&IFF_UP) == 0)
 204                                 *cp++ = '*';
 205                         *cp = '\0';
 206
 207                         if (kread((u_long)ifnet.if_addrheads,
 208                                   (char *)&head, sizeof(head)))
 209                                 return;
 210
 211                         ifaddrcont_addr =
 212                                 (u_long)TAILQ_FIRST(&head);
 213                         if (ifaddrcont_addr == 0) {
 214                                 ifaddraddr = 0;
 215                         } else {
 216                                 if (kread(ifaddrcont_addr, (char *)&ifac,
 217                                           sizeof(ifac)))
 218                                         return;
 219                                 ifaddraddr = (u_long)ifac.ifa;
 220                         }
 221                 }
 222                 ifaddrfound = ifaddraddr;
 223
 224                 /*
 225                  * Get the interface stats.  These may get
 226                  * overriden below on a per-interface basis.
 227                  */
 228                 ifdataaddr = (u_long)ifnet.if_data_pcpu;
 229                 if (kread(ifdataaddr, (char *)&ifdata, sizeof(ifdata)))
 230                         return;
 231                 opackets = ifdata.ifd_opackets;
 232                 ipackets = ifdata.ifd_ipackets;
 233                 obytes = ifdata.ifd_obytes;
 234                 ibytes = ifdata.ifd_ibytes;
 235                 oerrors = ifdata.ifd_oerrors;
 236                 ierrors = ifdata.ifd_ierrors;
 237                 collisions = ifdata.ifd_collisions;
 238
 239                 for (cpu = 1; cpu < ncpus; ++cpu) {
 240                         if (kread(ifdataaddr + (cpu * sizeof(ifdata)),
 241                             (char *)&ifdata, sizeof(ifdata)))
 242                                 return;
 243                         opackets += ifdata.ifd_opackets;
 244                         ipackets += ifdata.ifd_ipackets;
 245                         obytes += ifdata.ifd_obytes;
 246                         ibytes += ifdata.ifd_ibytes;
 247                         oerrors += ifdata.ifd_oerrors;
 248                         ierrors += ifdata.ifd_ierrors;
 249                         collisions += ifdata.ifd_collisions;
 250                 }
 251
 252                 timer = ifnet.if_timer;
 253                 drops = 0;
 254
 255                 if (ifaddraddr == 0) {
 256                         printf("%-7.7s %-5lu ", name, ifnet.if_mtu);
 257                         printf("%-13.13s ", "none");
 258                         printf("%-15.15s ", "none");
 259                 } else {
 260                         if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)) {
 261                                 ifaddraddr = 0;
 262                                 continue;
 263                         }
 264
 265                         ifaddr.ifa.if_ipackets = ifac.ifa_ipackets;
 266                         ifaddr.ifa.if_ibytes = ifac.ifa_ibytes;
 267                         ifaddr.ifa.if_opackets = ifac.ifa_opackets;
 268                         ifaddr.ifa.if_obytes = ifac.ifa_obytes;
 269                         for (cpu = 1; cpu < ncpus; ++cpu) {
 270                                 struct ifaddr_container nifac;
 271
 272                                 if (kread(ifaddrcont_addr +
 273                                     (cpu * sizeof(nifac)),
 274                                     (char *)&nifac, sizeof(nifac))) {
 275                                         ifaddraddr = 0;
 276                                         continue;
 277                                 }
 278                                 ifaddr.ifa.if_ipackets += nifac.ifa_ipackets;
 279                                 ifaddr.ifa.if_ibytes += nifac.ifa_ibytes;
 280                                 ifaddr.ifa.if_opackets += nifac.ifa_opackets;
 281                                 ifaddr.ifa.if_obytes += nifac.ifa_obytes;
 282                         }
 283
 284 #define CP(x) ((char *)(x))
 285                         cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) +
 286                                 CP(&ifaddr);
 287                         sa = (struct sockaddr *)cp;
 288                         if (af != AF_UNSPEC && sa->sa_family != af) {
 289                                 ifaddrcont_addr =
 290                                         (u_long)TAILQ_NEXT(&ifac, ifa_link);
 291                                 if (ifaddrcont_addr == 0) {
 292                                         ifaddraddr = 0;
 293                                 } else {
 294                                         if (kread(ifaddrcont_addr,
 295                                             (char *)&ifac, sizeof(ifac))) {
 296                                                 ifaddraddr = 0;
 297                                                 continue;
 298                                         }
 299                                         ifaddraddr = (u_long)ifac.ifa;
 300                                 }
 301                                 continue;
 302                         }
 303                         printf("%-7.7s %-5lu ", name, ifnet.if_mtu);
 304                         switch (sa->sa_family) {
 305                         case AF_UNSPEC:
 306                                 printf("%-13.13s ", "none");
 307                                 printf("%-15.15s ", "none");
 308                                 break;
 309                         case AF_INET:
 310                                 sin = (struct sockaddr_in *)sa;
 311 #ifdef notdef
 312                                 /* can't use inet_makeaddr because kernel
 313                                  * keeps nets unshifted.
 314                                  */
 315                                 in = inet_makeaddr(ifaddr.in.ia_subnet,
 316                                         INADDR_ANY);
 317                                 printf("%-13.13s ", netname(in.s_addr,
 318                                     ifaddr.in.ia_subnetmask));
 319 #else
 320                                 printf("%-13.13s ",
 321                                     netname(htonl(ifaddr.in.ia_subnet),
 322                                     ifaddr.in.ia_subnetmask));
 323 #endif
 324                                 printf("%-15.15s ",
 325                                     routename(sin->sin_addr.s_addr));
 326
 327                                 network_layer = 1;
 328                                 break;
 329 #ifdef INET6
 330                         case AF_INET6:
 331                                 sin6 = (struct sockaddr_in6 *)sa;
 332                                 printf("%-11.11s ",
 333                                        netname6(&ifaddr.in6.ia_addr,
 334                                                 &ifaddr.in6.ia_prefixmask.sin6_addr));
 335                                 printf("%-17.17s ",
 336                                     inet_ntop(AF_INET6,
 337                                         &sin6->sin6_addr,
 338                                         ntop_buf, sizeof(ntop_buf)));
 339
 340                                 network_layer = 1;
 341                                 break;
 342 #endif /*INET6*/
 343                         case AF_LINK:
 344                                 {
 345                                 struct sockaddr_dl *sdl =
 346                                         (struct sockaddr_dl *)sa;
 347                                 char linknum[10];
 348                                 cp = (char *)LLADDR(sdl);
 349                                 n = sdl->sdl_alen;
 350                                 sprintf(linknum, "<Link#%d>", sdl->sdl_index);
 351                                 m = printf("%-11.11s ", linknum);
 352                                 }
 353                                 goto hexprint;
 354                         default:
 355                                 m = printf("(%d)", sa->sa_family);
 356                                 for (cp = sa->sa_len + (char *)sa;
 357                                         --cp > sa->sa_data && (*cp == 0);) {}
 358                                 n = cp - sa->sa_data + 1;
 359                                 cp = sa->sa_data;
 360                         hexprint:
 361                                 while (--n >= 0)
 362                                         m += printf("%02x%c", *cp++ & 0xff,
 363                                                     n > 0 ? ':' : ' ');
 364                                 m = 30 - m;
 365                                 while (m-- > 0)
 366                                         putchar(' ');
 367
 368                                 link_layer = 1;
 369                                 break;
 370                         }
 371
 372                         /*
 373                          * Fixup the statistics for interfaces that
 374                          * update stats for their network addresses
 375                          */
 376                         if (network_layer) {
 377                                 opackets = ifaddr.ifa.if_opackets;
 378                                 ipackets = ifaddr.ifa.if_ipackets;
 379                                 obytes = ifaddr.ifa.if_obytes;
 380                                 ibytes = ifaddr.ifa.if_ibytes;
 381                         }
 382
 383                         ifaddrcont_addr =
 384                                 (u_long)TAILQ_NEXT(&ifac, ifa_link);
 385                         if (ifaddrcont_addr == 0) {
 386                                 ifaddraddr = 0;
 387                         } else {
 388                                 if (kread(ifaddrcont_addr,
 389                                     (char *)&ifac, sizeof(ifac))) {
 390                                         ifaddraddr = 0;
 391                                 } else {
 392                                         ifaddraddr = (u_long)ifac.ifa;
 393                                 }
 394                         }
 395                 }
 396
 397                 show_stat("lu", 8, ipackets, link_layer|network_layer);
 398                 printf(" ");
 399                 show_stat("lu", 5, ierrors, link_layer);
 400                 printf(" ");
 401                 if (bflag) {
 402                         show_stat("lu", 10, ibytes, link_layer|network_layer);
 403                         printf(" ");
 404                 }
 405                 show_stat("lu", 8, opackets, link_layer|network_layer);
 406                 printf(" ");
 407                 show_stat("lu", 5, oerrors, link_layer);
 408                 printf(" ");
 409                 if (bflag) {
 410                         show_stat("lu", 10, obytes, link_layer|network_layer);
 411                         printf(" ");
 412                 }
 413                 show_stat("lu", 5, collisions, link_layer);
 414                 if (tflag) {
 415                         printf(" ");
 416                         show_stat("d", 3, timer, link_layer);
 417                 }
 418                 if (dflag) {
 419                         printf(" ");
 420                         show_stat("d", 3, drops, link_layer);
 421                 }
 422                 putchar('\n');
 423                 if (aflag && ifaddrfound) {
 424                         /*
 425                          * Print family's multicast addresses
 426                          */
 427                         struct ifmultiaddr *multiaddr;
 428                         struct ifmultiaddr ifma;
 429                         union {
 430                                 struct sockaddr sa;
 431                                 struct sockaddr_in in;
 432 #ifdef INET6
 433                                 struct sockaddr_in6 in6;
 434 #endif /* INET6 */
 435                                 struct sockaddr_dl dl;
 436                         } msa;
 437                         const char *fmt;
 438
 439                         TAILQ_FOREACH(multiaddr, &ifnet.if_multiaddrs, ifma_link) {
 440                                 if (kread((u_long)multiaddr, (char *)&ifma,
 441                                           sizeof ifma))
 442                                         break;
 443                                 multiaddr = &ifma;
 444                                 if (kread((u_long)ifma.ifma_addr, (char *)&msa,
 445                                           sizeof msa))
 446                                         break;
 447                                 if (msa.sa.sa_family != sa->sa_family)
 448                                         continue;
 449
 450                                 fmt = NULL;
 451                                 switch (msa.sa.sa_family) {
 452                                 case AF_INET:
 453                                         fmt = routename(msa.in.sin_addr.s_addr);
 454                                         break;
 455 #ifdef INET6
 456                                 case AF_INET6:
 457                                         printf("%23s %-19.19s(refs: %d)\n", "",
 458                                                inet_ntop(AF_INET6,
 459                                                          &msa.in6.sin6_addr,
 460                                                          ntop_buf,
 461                                                          sizeof(ntop_buf)),
 462                                                ifma.ifma_refcount);
 463                                         break;
 464 #endif /* INET6 */
 465                                 case AF_LINK:
 466                                         switch (msa.dl.sdl_type) {
 467                                         case IFT_ETHER:
 468                                         case IFT_FDDI:
 469                                                 fmt = ether_ntoa(
 470                                                         (struct ether_addr *)
 471                                                         LLADDR(&msa.dl));
 472                                                 break;
 473                                         }
 474                                         break;
 475                                 }
 476                                 if (fmt)
 477                                         printf("%23s %s\n", "", fmt);
 478                         }
 479                 }
 480         }
 481 }
 482
 483 struct  iftot {
 484         SLIST_ENTRY(iftot) chain;
 485         char    ift_name[IFNAMSIZ];     /* interface name */
 486         u_long  ift_ip;                 /* input packets */
 487         u_long  ift_ie;                 /* input errors */
 488         u_long  ift_op;                 /* output packets */
 489         u_long  ift_oe;                 /* output errors */
 490         u_long  ift_co;                 /* collisions */
 491         u_int   ift_dr;                 /* drops */
 492         u_long  ift_ib;                 /* input bytes */
 493         u_long  ift_ob;                 /* output bytes */
 494 };
 495
 496 u_char  signalled;                      /* set if alarm goes off "early" */
 497
 498 /*
 499  * Print a running summary of interface statistics.
 500  * Repeat display every interval1 seconds, showing statistics
 501  * collected over that interval.  Assumes that interval1 is non-zero.
 502  * First line printed at top of screen is always cumulative.
 503  * XXX - should be rewritten to use ifmib(4).
 504  */
 505 static void
 506 sidewaysintpr(unsigned interval1, u_long off, int ncpus)
 507 {
 508         struct ifnet ifnet;
 509         u_long firstifnet;
 510         struct ifnethead ifnethead;
 511         struct ifdata_pcpu ifdata;
 512         struct iftot *iftot, *ip, *ipn, *total, *sum, *interesting;
 513         int line, cpu;
 514         int oldmask, first;
 515         u_long interesting_off;
 516         u_long ifdata_addr;
 517
 518         if (kread(off, (char *)&ifnethead, sizeof ifnethead))
 519                 return;
 520         firstifnet = (u_long)TAILQ_FIRST(&ifnethead);
 521
 522         if ((iftot = malloc(sizeof(struct iftot))) == NULL) {
 523                 printf("malloc failed\n");
 524                 exit(1);
 525         }
 526         memset(iftot, 0, sizeof(struct iftot));
 527
 528         interesting = NULL;
 529         interesting_off = 0;
 530         for (off = firstifnet, ip = iftot; off;) {
 531                 char name[IFNAMSIZ];
 532
 533                 if (kread(off, (char *)&ifnet, sizeof ifnet))
 534                         break;
 535                 strlcpy(name, ifnet.if_xname, sizeof(name));
 536                 if (interface && strcmp(name, interface) == 0) {
 537                         interesting = ip;
 538                         interesting_off = off;
 539                 }
 540                 snprintf(ip->ift_name, 16, "(%s)", name);
 541                 if ((ipn = malloc(sizeof(struct iftot))) == NULL) {
 542                         printf("malloc failed\n");
 543                         exit(1);
 544                 }
 545                 memset(ipn, 0, sizeof(struct iftot));
 546                 SLIST_NEXT(ip, chain) = ipn;
 547                 ip = ipn;
 548                 off = (u_long)TAILQ_NEXT(&ifnet, if_link);
 549         }
 550         if ((total = malloc(sizeof(struct iftot))) == NULL) {
 551                 printf("malloc failed\n");
 552                 exit(1);
 553         }
 554         memset(total, 0, sizeof(struct iftot));
 555         if ((sum = malloc(sizeof(struct iftot))) == NULL) {
 556                 printf("malloc failed\n");
 557                 exit(1);
 558         }
 559         memset(sum, 0, sizeof(struct iftot));
 560
 561
 562         (void)signal(SIGALRM, catchalarm);
 563         signalled = NO;
 564         (void)alarm(interval1);
 565         first = 1;
 566 banner:
 567         printf("%17s %14s %16s", "input",
 568             interesting ? interesting->ift_name : "(Total)", "output");
 569         putchar('\n');
 570         printf("%10s %5s %10s %10s %5s %10s %5s",
 571             "packets", "errs", "bytes", "packets", "errs", "bytes", "colls");
 572         if (dflag)
 573                 printf(" %5.5s", "drops");
 574         putchar('\n');
 575         fflush(stdout);
 576         line = 0;
 577 loop:
 578         if (interesting != NULL) {
 579                 ip = interesting;
 580                 if (kread(interesting_off, (char *)&ifnet, sizeof ifnet)) {
 581                         printf("???\n");
 582                         exit(1);
 583                 }
 584
 585                 ifdata_addr = (u_long)ifnet.if_data_pcpu;
 586                 if (kread(ifdata_addr, (char *)&ifdata, sizeof(ifdata))) {
 587                         printf("ifdata 1\n");
 588                         exit(1);
 589                 }
 590                 ifnet.if_ipackets = ifdata.ifd_ipackets;
 591                 ifnet.if_ierrors = ifdata.ifd_ierrors;
 592                 ifnet.if_ibytes = ifdata.ifd_ibytes;
 593                 ifnet.if_opackets = ifdata.ifd_opackets;
 594                 ifnet.if_oerrors = ifdata.ifd_oerrors;
 595                 ifnet.if_obytes = ifdata.ifd_obytes;
 596                 ifnet.if_collisions = ifdata.ifd_collisions;
 597
 598                 for (cpu = 1; cpu < ncpus; ++cpu) {
 599                         if (kread(ifdata_addr + (cpu * sizeof(ifdata)),
 600                             (char *)&ifdata, sizeof(ifdata))) {
 601                                 printf("ifdata 2\n");
 602                                 exit(1);
 603                         }
 604                         ifnet.if_ipackets += ifdata.ifd_ipackets;
 605                         ifnet.if_ierrors += ifdata.ifd_ierrors;
 606                         ifnet.if_ibytes += ifdata.ifd_ibytes;
 607                         ifnet.if_opackets += ifdata.ifd_opackets;
 608                         ifnet.if_oerrors += ifdata.ifd_oerrors;
 609                         ifnet.if_obytes += ifdata.ifd_obytes;
 610                         ifnet.if_collisions += ifdata.ifd_collisions;
 611                 }
 612
 613                 if (!first) {
 614                         printf("%10lu %5lu %10lu %10lu %5lu %10lu %5lu",
 615                                 ifnet.if_ipackets - ip->ift_ip,
 616                                 ifnet.if_ierrors - ip->ift_ie,
 617                                 ifnet.if_ibytes - ip->ift_ib,
 618                                 ifnet.if_opackets - ip->ift_op,
 619                                 ifnet.if_oerrors - ip->ift_oe,
 620                                 ifnet.if_obytes - ip->ift_ob,
 621                                 ifnet.if_collisions - ip->ift_co);
 622                         if (dflag)
 623                                 printf(" %5u", 0 - ip->ift_dr);
 624                 }
 625                 ip->ift_ip = ifnet.if_ipackets;
 626                 ip->ift_ie = ifnet.if_ierrors;
 627                 ip->ift_ib = ifnet.if_ibytes;
 628                 ip->ift_op = ifnet.if_opackets;
 629                 ip->ift_oe = ifnet.if_oerrors;
 630                 ip->ift_ob = ifnet.if_obytes;
 631                 ip->ift_co = ifnet.if_collisions;
 632                 ip->ift_dr = 0;
 633         } else {
 634                 sum->ift_ip = 0;
 635                 sum->ift_ie = 0;
 636                 sum->ift_ib = 0;
 637                 sum->ift_op = 0;
 638                 sum->ift_oe = 0;
 639                 sum->ift_ob = 0;
 640                 sum->ift_co = 0;
 641                 sum->ift_dr = 0;
 642                 for (off = firstifnet, ip = iftot;
 643                      off && SLIST_NEXT(ip, chain) != NULL;
 644                      ip = SLIST_NEXT(ip, chain)) {
 645                         if (kread(off, (char *)&ifnet, sizeof ifnet)) {
 646                                 off = 0;
 647                                 continue;
 648                         }
 649
 650                         ifdata_addr = (u_long)ifnet.if_data_pcpu;
 651                         if (kread(ifdata_addr, (char *)&ifdata,
 652                             sizeof(ifdata))) {
 653                                 printf("ifdata 3\n");
 654                                 exit(1);
 655                         }
 656                         ifnet.if_ipackets = ifdata.ifd_ipackets;
 657                         ifnet.if_ierrors = ifdata.ifd_ierrors;
 658                         ifnet.if_ibytes = ifdata.ifd_ibytes;
 659                         ifnet.if_opackets = ifdata.ifd_opackets;
 660                         ifnet.if_oerrors = ifdata.ifd_oerrors;
 661                         ifnet.if_obytes = ifdata.ifd_obytes;
 662                         ifnet.if_collisions = ifdata.ifd_collisions;
 663
 664                         for (cpu = 1; cpu < ncpus; ++cpu) {
 665                                 if (kread(ifdata_addr + (cpu * sizeof(ifdata)),
 666                                     (char *)&ifdata, sizeof(ifdata))) {
 667                                         printf("ifdata 2\n");
 668                                         exit(1);
 669                                 }
 670                                 ifnet.if_ipackets += ifdata.ifd_ipackets;
 671                                 ifnet.if_ierrors += ifdata.ifd_ierrors;
 672                                 ifnet.if_ibytes += ifdata.ifd_ibytes;
 673                                 ifnet.if_opackets += ifdata.ifd_opackets;
 674                                 ifnet.if_oerrors += ifdata.ifd_oerrors;
 675                                 ifnet.if_obytes += ifdata.ifd_obytes;
 676                                 ifnet.if_collisions += ifdata.ifd_collisions;
 677                         }
 678
 679                         /*
 680                          * Don't double-count interfaces that are associated
 681                          * with bridges, they will be rolled up by the
 682                          * bridge.  Errors and collisions are not rolled up.
 683                          */
 684                         if (ifnet.if_bridge) {
 685                                 sum->ift_ie += ifnet.if_ierrors;
 686                                 sum->ift_oe += ifnet.if_oerrors;
 687                                 sum->ift_co += ifnet.if_collisions;
 688                         } else {
 689                                 sum->ift_ip += ifnet.if_ipackets;
 690                                 sum->ift_ie += ifnet.if_ierrors;
 691                                 sum->ift_ib += ifnet.if_ibytes;
 692                                 sum->ift_op += ifnet.if_opackets;
 693                                 sum->ift_oe += ifnet.if_oerrors;
 694                                 sum->ift_ob += ifnet.if_obytes;
 695                                 sum->ift_co += ifnet.if_collisions;
 696                                 sum->ift_dr += 0;
 697                         }
 698                         off = (u_long)TAILQ_NEXT(&ifnet, if_link);
 699                 }
 700                 if (!first) {
 701                         /* %10lu %5lu %10lu %10lu %5lu %10lu %5lu */
 702                         show_stat("lu", 10,   sum->ift_ip - total->ift_ip, 1);
 703                         show_stat("lu",  5+1, sum->ift_ie - total->ift_ie, 1);
 704                         show_stat("lu", 10+1, sum->ift_ib - total->ift_ib, 1);
 705                         show_stat("lu", 10+1, sum->ift_op - total->ift_op, 1);
 706                         show_stat("lu",  5+1, sum->ift_oe - total->ift_oe, 1);
 707                         show_stat("lu", 10+1, sum->ift_ob - total->ift_ob, 1);
 708                         show_stat("lu",  5+1, sum->ift_co - total->ift_co, 1);
 709                         if (dflag)
 710                                 show_stat("u", 5+1, sum->ift_dr - total->ift_dr, 1);
 711                 }
 712                 *total = *sum;
 713         }
 714         if (!first)
 715                 putchar('\n');
 716         fflush(stdout);
 717         oldmask = sigblock(sigmask(SIGALRM));
 718         if (! signalled) {
 719                 sigpause(0);
 720         }
 721         sigsetmask(oldmask);
 722         signalled = NO;
 723         (void)alarm(interval1);
 724         line++;
 725         first = 0;
 726         if (line == 21)
 727                 goto banner;
 728         else
 729                 goto loop;
 730         /*NOTREACHED*/
 731 }
 732
 733 /*
 734  * Called if an interval expires before sidewaysintpr has completed a loop.
 735  * Sets a flag to not wait for the alarm.
 736  */
 737 static void
 738 catchalarm(int signo __unused)
 739 {
 740         signalled = YES;
 741 }