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  * 4. 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
  30 #if 0
  31 #ifndef lint
  32 static char sccsid[] = "@(#)if.c        8.3 (Berkeley) 4/28/95";
  33 #endif /* not lint */
  34 #endif
  35
  36 #include <sys/cdefs.h>
  37 __FBSDID("$FreeBSD$");
  38
  39 #include <sys/types.h>
  40 #include <sys/protosw.h>
  41 #include <sys/socket.h>
  42 #include <sys/socketvar.h>
  43 #include <sys/sysctl.h>
  44 #include <sys/time.h>
  45
  46 #include <net/if.h>
  47 #include <net/if_var.h>
  48 #include <net/if_dl.h>
  49 #include <net/if_types.h>
  50 #include <net/ethernet.h>
  51 #include <net/pfvar.h>
  52 #include <net/if_pfsync.h>
  53 #include <netinet/in.h>
  54 #include <netinet/in_var.h>
  55 #include <netipx/ipx.h>
  56 #include <netipx/ipx_if.h>
  57 #include <arpa/inet.h>
  58
  59 #include <err.h>
  60 #include <errno.h>
  61 #include <libutil.h>
  62 #ifdef INET6
  63 #include <netdb.h>
  64 #endif
  65 #include <signal.h>
  66 #include <stdint.h>
  67 #include <stdio.h>
  68 #include <stdlib.h>
  69 #include <string.h>
  70 #include <unistd.h>
  71
  72 #include "netstat.h"
  73
  74 #define YES     1
  75 #define NO      0
  76
  77 static void sidewaysintpr(int, u_long);
  78 static void catchalarm(int);
  79
  80 #ifdef INET6
  81 static char addr_buf[NI_MAXHOST];               /* for getnameinfo() */
  82 #endif
  83
  84 /*
  85  * Dump pfsync statistics structure.
  86  */
  87 void
  88 pfsync_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
  89 {
  90         struct pfsyncstats pfsyncstat, zerostat;
  91         size_t len = sizeof(struct pfsyncstats);
  92
  93         if (live) {
  94                 if (zflag)
  95                         memset(&zerostat, 0, len);
  96                 if (sysctlbyname("net.inet.pfsync.stats", &pfsyncstat, &len,
  97                     zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
  98                         if (errno != ENOENT)
  99                                 warn("sysctl: net.inet.pfsync.stats");
 100                         return;
 101                 }
 102         } else
 103                 kread(off, &pfsyncstat, len);
 104
 105         printf("%s:\n", name);
 106
 107 #define p(f, m) if (pfsyncstat.f || sflag <= 1) \
 108         printf(m, (uintmax_t)pfsyncstat.f, plural(pfsyncstat.f))
 109 #define p2(f, m) if (pfsyncstat.f || sflag <= 1) \
 110         printf(m, (uintmax_t)pfsyncstat.f)
 111
 112         p(pfsyncs_ipackets, "\t%ju packet%s received (IPv4)\n");
 113         p(pfsyncs_ipackets6, "\t%ju packet%s received (IPv6)\n");
 114         p(pfsyncs_badif, "\t\t%ju packet%s discarded for bad interface\n");
 115         p(pfsyncs_badttl, "\t\t%ju packet%s discarded for bad ttl\n");
 116         p(pfsyncs_hdrops, "\t\t%ju packet%s shorter than header\n");
 117         p(pfsyncs_badver, "\t\t%ju packet%s discarded for bad version\n");
 118         p(pfsyncs_badauth, "\t\t%ju packet%s discarded for bad HMAC\n");
 119         p(pfsyncs_badact,"\t\t%ju packet%s discarded for bad action\n");
 120         p(pfsyncs_badlen, "\t\t%ju packet%s discarded for short packet\n");
 121         p(pfsyncs_badval, "\t\t%ju state%s discarded for bad values\n");
 122         p(pfsyncs_stale, "\t\t%ju stale state%s\n");
 123         p(pfsyncs_badstate, "\t\t%ju failed state lookup/insert%s\n");
 124         p(pfsyncs_opackets, "\t%ju packet%s sent (IPv4)\n");
 125         p(pfsyncs_opackets6, "\t%ju packet%s sent (IPv6)\n");
 126         p2(pfsyncs_onomem, "\t\t%ju send failed due to mbuf memory error\n");
 127         p2(pfsyncs_oerrors, "\t\t%ju send error\n");
 128 #undef p
 129 #undef p2
 130 }
 131
 132 /*
 133  * Display a formatted value, or a '-' in the same space.
 134  */
 135 static void
 136 show_stat(const char *fmt, int width, u_long value, short showvalue)
 137 {
 138         const char *lsep, *rsep;
 139         char newfmt[32];
 140
 141         lsep = "";
 142         if (strncmp(fmt, "LS", 2) == 0) {
 143                 lsep = " ";
 144                 fmt += 2;
 145         }
 146         rsep = " ";
 147         if (strncmp(fmt, "NRS", 3) == 0) {
 148                 rsep = "";
 149                 fmt += 3;
 150         }
 151         if (showvalue == 0) {
 152                 /* Print just dash. */
 153                 sprintf(newfmt, "%s%%%ds%s", lsep, width, rsep);
 154                 printf(newfmt, "-");
 155                 return;
 156         }
 157
 158         if (hflag) {
 159                 char buf[5];
 160
 161                 /* Format in human readable form. */
 162                 humanize_number(buf, sizeof(buf), (int64_t)value, "",
 163                     HN_AUTOSCALE, HN_NOSPACE | HN_DECIMAL);
 164                 sprintf(newfmt, "%s%%%ds%s", lsep, width, rsep);
 165                 printf(newfmt, buf);
 166         } else {
 167                 /* Construct the format string. */
 168                 sprintf(newfmt, "%s%%%d%s%s", lsep, width, fmt, rsep);
 169                 printf(newfmt, value);
 170         }
 171 }
 172
 173 /*
 174  * Print a description of the network interfaces.
 175  */
 176 void
 177 intpr(int interval1, u_long ifnetaddr, void (*pfunc)(char *))
 178 {
 179         struct ifnet ifnet;
 180         struct ifnethead ifnethead;
 181         union {
 182                 struct ifaddr ifa;
 183                 struct in_ifaddr in;
 184 #ifdef INET6
 185                 struct in6_ifaddr in6;
 186 #endif
 187                 struct ipx_ifaddr ipx;
 188         } ifaddr;
 189         u_long ifaddraddr;
 190         u_long ifaddrfound;
 191         u_long ifnetfound;
 192         u_long opackets;
 193         u_long ipackets;
 194         u_long obytes;
 195         u_long ibytes;
 196         u_long omcasts;
 197         u_long imcasts;
 198         u_long oerrors;
 199         u_long ierrors;
 200         u_long idrops;
 201         u_long collisions;
 202         int drops;
 203         struct sockaddr *sa = NULL;
 204         char name[IFNAMSIZ];
 205         short network_layer;
 206         short link_layer;
 207
 208         if (ifnetaddr == 0) {
 209                 printf("ifnet: symbol not defined\n");
 210                 return;
 211         }
 212         if (interval1) {
 213                 sidewaysintpr(interval1, ifnetaddr);
 214                 return;
 215         }
 216         if (kread(ifnetaddr, (char *)&ifnethead, sizeof ifnethead) != 0)
 217                 return;
 218         ifnetaddr = (u_long)TAILQ_FIRST(&ifnethead);
 219         if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet) != 0)
 220                 return;
 221
 222         if (!pfunc) {
 223                 if (Wflag)
 224                         printf("%-7.7s", "Name");
 225                 else
 226                         printf("%-5.5s", "Name");
 227                 printf(" %5.5s %-13.13s %-17.17s %8.8s %5.5s %5.5s",
 228                     "Mtu", "Network", "Address", "Ipkts", "Ierrs", "Idrop");
 229                 if (bflag)
 230                         printf(" %10.10s","Ibytes");
 231                 printf(" %8.8s %5.5s", "Opkts", "Oerrs");
 232                 if (bflag)
 233                         printf(" %10.10s","Obytes");
 234                 printf(" %5s", "Coll");
 235                 if (dflag)
 236                         printf(" %s", "Drop");
 237                 putchar('\n');
 238         }
 239         ifaddraddr = 0;
 240         while (ifnetaddr || ifaddraddr) {
 241                 struct sockaddr_in *sockin;
 242 #ifdef INET6
 243                 struct sockaddr_in6 *sockin6;
 244 #endif
 245                 char *cp;
 246                 int n, m;
 247
 248                 network_layer = 0;
 249                 link_layer = 0;
 250
 251                 if (ifaddraddr == 0) {
 252                         ifnetfound = ifnetaddr;
 253                         if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet) != 0)
 254                                 return;
 255                         strlcpy(name, ifnet.if_xname, sizeof(name));
 256                         ifnetaddr = (u_long)TAILQ_NEXT(&ifnet, if_link);
 257                         if (interface != 0 && strcmp(name, interface) != 0)
 258                                 continue;
 259                         cp = index(name, '\0');
 260
 261                         if (pfunc) {
 262                                 (*pfunc)(name);
 263                                 continue;
 264                         }
 265
 266                         if ((ifnet.if_flags&IFF_UP) == 0)
 267                                 *cp++ = '*';
 268                         *cp = '\0';
 269                         ifaddraddr = (u_long)TAILQ_FIRST(&ifnet.if_addrhead);
 270                 }
 271                 ifaddrfound = ifaddraddr;
 272
 273                 /*
 274                  * Get the interface stats.  These may get
 275                  * overriden below on a per-interface basis.
 276                  */
 277                 opackets = ifnet.if_opackets;
 278                 ipackets = ifnet.if_ipackets;
 279                 obytes = ifnet.if_obytes;
 280                 ibytes = ifnet.if_ibytes;
 281                 omcasts = ifnet.if_omcasts;
 282                 imcasts = ifnet.if_imcasts;
 283                 oerrors = ifnet.if_oerrors;
 284                 ierrors = ifnet.if_ierrors;
 285                 idrops = ifnet.if_iqdrops;
 286                 collisions = ifnet.if_collisions;
 287                 drops = ifnet.if_snd.ifq_drops;
 288
 289                 if (ifaddraddr == 0) {
 290                         if (Wflag)
 291                                 printf("%-7.7s", name);
 292                         else
 293                                 printf("%-5.5s", name);
 294                         printf(" %5lu ", ifnet.if_mtu);
 295                         printf("%-13.13s ", "none");
 296                         printf("%-17.17s ", "none");
 297                 } else {
 298                         if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)
 299                             != 0) {
 300                                 ifaddraddr = 0;
 301                                 continue;
 302                         }
 303 #define CP(x) ((char *)(x))
 304                         cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) +
 305                                 CP(&ifaddr);
 306                         sa = (struct sockaddr *)cp;
 307                         if (af != AF_UNSPEC && sa->sa_family != af) {
 308                                 ifaddraddr =
 309                                     (u_long)TAILQ_NEXT(&ifaddr.ifa, ifa_link);
 310                                 continue;
 311                         }
 312                         if (Wflag)
 313                                 printf("%-7.7s", name);
 314                         else
 315                                 printf("%-5.5s", name);
 316                         printf(" %5lu ", ifnet.if_mtu);
 317                         switch (sa->sa_family) {
 318                         case AF_UNSPEC:
 319                                 printf("%-13.13s ", "none");
 320                                 printf("%-15.15s ", "none");
 321                                 break;
 322                         case AF_INET:
 323                                 sockin = (struct sockaddr_in *)sa;
 324 #ifdef notdef
 325                                 /* can't use inet_makeaddr because kernel
 326                                  * keeps nets unshifted.
 327                                  */
 328                                 in = inet_makeaddr(ifaddr.in.ia_subnet,
 329                                         INADDR_ANY);
 330                                 printf("%-13.13s ", netname(in.s_addr,
 331                                     ifaddr.in.ia_subnetmask));
 332 #else
 333                                 printf("%-13.13s ",
 334                                     netname(htonl(ifaddr.in.ia_subnet),
 335                                     ifaddr.in.ia_subnetmask));
 336 #endif
 337                                 printf("%-17.17s ",
 338                                     routename(sockin->sin_addr.s_addr));
 339
 340                                 network_layer = 1;
 341                                 break;
 342 #ifdef INET6
 343                         case AF_INET6:
 344                                 sockin6 = (struct sockaddr_in6 *)sa;
 345                                 in6_fillscopeid(&ifaddr.in6.ia_addr);
 346                                 printf("%-13.13s ",
 347                                        netname6(&ifaddr.in6.ia_addr,
 348                                                 &ifaddr.in6.ia_prefixmask.sin6_addr));
 349                                 in6_fillscopeid(sockin6);
 350                                 getnameinfo(sa, sa->sa_len, addr_buf,
 351                                     sizeof(addr_buf), 0, 0, NI_NUMERICHOST);
 352                                 printf("%-17.17s ", addr_buf);
 353
 354                                 network_layer = 1;
 355                                 break;
 356 #endif /*INET6*/
 357                         case AF_IPX:
 358                                 {
 359                                 struct sockaddr_ipx *sipx =
 360                                         (struct sockaddr_ipx *)sa;
 361                                 u_long net;
 362                                 char netnum[10];
 363
 364                                 *(union ipx_net *) &net = sipx->sipx_addr.x_net;
 365                                 sprintf(netnum, "%lx", (u_long)ntohl(net));
 366                                 printf("ipx:%-8s  ", netnum);
 367 /*                              printf("ipx:%-8s ", netname(net, 0L)); */
 368                                 printf("%-17s ",
 369                                     ipx_phost((struct sockaddr *)sipx));
 370                                 }
 371
 372                                 network_layer = 1;
 373                                 break;
 374
 375                         case AF_APPLETALK:
 376                                 printf("atalk:%-12.12s ",atalk_print(sa,0x10) );
 377                                 printf("%-11.11s  ",atalk_print(sa,0x0b) );
 378                                 break;
 379                         case AF_LINK:
 380                                 {
 381                                 struct sockaddr_dl *sdl =
 382                                         (struct sockaddr_dl *)sa;
 383                                 char linknum[10];
 384                                 cp = (char *)LLADDR(sdl);
 385                                 n = sdl->sdl_alen;
 386                                 sprintf(linknum, "<Link#%d>", sdl->sdl_index);
 387                                 m = printf("%-13.13s ", linknum);
 388                                 }
 389                                 goto hexprint;
 390                         default:
 391                                 m = printf("(%d)", sa->sa_family);
 392                                 for (cp = sa->sa_len + (char *)sa;
 393                                         --cp > sa->sa_data && (*cp == 0);) {}
 394                                 n = cp - sa->sa_data + 1;
 395                                 cp = sa->sa_data;
 396                         hexprint:
 397                                 while ((--n >= 0) && (m < 30))
 398                                         m += printf("%02x%c", *cp++ & 0xff,
 399                                                     n > 0 ? ':' : ' ');
 400                                 m = 32 - m;
 401                                 while (m-- > 0)
 402                                         putchar(' ');
 403
 404                                 link_layer = 1;
 405                                 break;
 406                         }
 407
 408                         /*
 409                          * Fixup the statistics for interfaces that
 410                          * update stats for their network addresses
 411                          */
 412                         if (network_layer) {
 413                                 opackets = ifaddr.in.ia_ifa.if_opackets;
 414                                 ipackets = ifaddr.in.ia_ifa.if_ipackets;
 415                                 obytes = ifaddr.in.ia_ifa.if_obytes;
 416                                 ibytes = ifaddr.in.ia_ifa.if_ibytes;
 417                         }
 418
 419                         ifaddraddr = (u_long)TAILQ_NEXT(&ifaddr.ifa, ifa_link);
 420                 }
 421
 422                 show_stat("lu", 8, ipackets, link_layer|network_layer);
 423                 show_stat("lu", 5, ierrors, link_layer);
 424                 show_stat("lu", 5, idrops, link_layer);
 425                 if (bflag)
 426                         show_stat("lu", 10, ibytes, link_layer|network_layer);
 427
 428                 show_stat("lu", 8, opackets, link_layer|network_layer);
 429                 show_stat("lu", 5, oerrors, link_layer);
 430                 if (bflag)
 431                         show_stat("lu", 10, obytes, link_layer|network_layer);
 432
 433                 show_stat("NRSlu", 5, collisions, link_layer);
 434                 if (dflag)
 435                         show_stat("LSd", 4, drops, link_layer);
 436                 putchar('\n');
 437
 438                 if (aflag && ifaddrfound) {
 439                         /*
 440                          * Print family's multicast addresses
 441                          */
 442                         struct ifmultiaddr *multiaddr;
 443                         struct ifmultiaddr ifma;
 444                         union {
 445                                 struct sockaddr sa;
 446                                 struct sockaddr_in in;
 447 #ifdef INET6
 448                                 struct sockaddr_in6 in6;
 449 #endif /* INET6 */
 450                                 struct sockaddr_dl dl;
 451                         } msa;
 452                         const char *fmt;
 453
 454                         TAILQ_FOREACH(multiaddr, &ifnet.if_multiaddrs, ifma_link) {
 455                                 if (kread((u_long)multiaddr, (char *)&ifma,
 456                                           sizeof ifma) != 0)
 457                                         break;
 458                                 multiaddr = &ifma;
 459                                 if (kread((u_long)ifma.ifma_addr, (char *)&msa,
 460                                           sizeof msa) != 0)
 461                                         break;
 462                                 if (msa.sa.sa_family != sa->sa_family)
 463                                         continue;
 464
 465                                 fmt = 0;
 466                                 switch (msa.sa.sa_family) {
 467                                 case AF_INET:
 468                                         fmt = routename(msa.in.sin_addr.s_addr);
 469                                         break;
 470 #ifdef INET6
 471                                 case AF_INET6:
 472                                         in6_fillscopeid(&msa.in6);
 473                                         getnameinfo(&msa.sa, msa.sa.sa_len,
 474                                             addr_buf, sizeof(addr_buf), 0, 0,
 475                                             NI_NUMERICHOST);
 476                                         printf("%*s %-19.19s(refs: %d)\n",
 477                                                Wflag ? 27 : 25, "",
 478                                                addr_buf, ifma.ifma_refcount);
 479                                         break;
 480 #endif /* INET6 */
 481                                 case AF_LINK:
 482                                         switch (msa.dl.sdl_type) {
 483                                         case IFT_ETHER:
 484                                         case IFT_FDDI:
 485                                                 fmt = ether_ntoa(
 486                                                         (struct ether_addr *)
 487                                                         LLADDR(&msa.dl));
 488                                                 break;
 489                                         }
 490                                         break;
 491                                 }
 492                                 if (fmt) {
 493                                         printf("%*s %-17.17s",
 494                                             Wflag ? 27 : 25, "", fmt);
 495                                         if (msa.sa.sa_family == AF_LINK) {
 496                                                 printf(" %8lu", imcasts);
 497                                                 printf("%*s",
 498                                                     bflag ? 17 : 6, "");
 499                                                 printf(" %8lu", omcasts);
 500                                         }
 501                                         putchar('\n');
 502                                 }
 503                         }
 504                 }
 505         }
 506 }
 507
 508 struct  iftot {
 509         SLIST_ENTRY(iftot) chain;
 510         char    ift_name[IFNAMSIZ];     /* interface name */
 511         u_long  ift_ip;                 /* input packets */
 512         u_long  ift_ie;                 /* input errors */
 513         u_long  ift_id;                 /* input drops */
 514         u_long  ift_op;                 /* output packets */
 515         u_long  ift_oe;                 /* output errors */
 516         u_long  ift_co;                 /* collisions */
 517         u_int   ift_dr;                 /* drops */
 518         u_long  ift_ib;                 /* input bytes */
 519         u_long  ift_ob;                 /* output bytes */
 520 };
 521
 522 u_char  signalled;                      /* set if alarm goes off "early" */
 523
 524 /*
 525  * Print a running summary of interface statistics.
 526  * Repeat display every interval1 seconds, showing statistics
 527  * collected over that interval.  Assumes that interval1 is non-zero.
 528  * First line printed at top of screen is always cumulative.
 529  * XXX - should be rewritten to use ifmib(4).
 530  */
 531 static void
 532 sidewaysintpr(int interval1, u_long off)
 533 {
 534         struct ifnet ifnet;
 535         u_long firstifnet;
 536         struct ifnethead ifnethead;
 537         struct itimerval interval_it;
 538         struct iftot *iftot, *ip, *ipn, *total, *sum, *interesting;
 539         int line;
 540         int oldmask, first;
 541         u_long interesting_off;
 542
 543         if (kread(off, (char *)&ifnethead, sizeof ifnethead) != 0)
 544                 return;
 545         firstifnet = (u_long)TAILQ_FIRST(&ifnethead);
 546
 547         if ((iftot = malloc(sizeof(struct iftot))) == NULL) {
 548                 printf("malloc failed\n");
 549                 exit(1);
 550         }
 551         memset(iftot, 0, sizeof(struct iftot));
 552
 553         interesting = NULL;
 554         interesting_off = 0;
 555         for (off = firstifnet, ip = iftot; off;) {
 556                 char name[IFNAMSIZ];
 557
 558                 if (kread(off, (char *)&ifnet, sizeof ifnet) != 0)
 559                         break;
 560                 strlcpy(name, ifnet.if_xname, sizeof(name));
 561                 if (interface && strcmp(name, interface) == 0) {
 562                         interesting = ip;
 563                         interesting_off = off;
 564                 }
 565                 snprintf(ip->ift_name, sizeof(ip->ift_name), "(%s)", name);
 566                 if ((ipn = malloc(sizeof(struct iftot))) == NULL) {
 567                         printf("malloc failed\n");
 568                         exit(1);
 569                 }
 570                 memset(ipn, 0, sizeof(struct iftot));
 571                 SLIST_NEXT(ip, chain) = ipn;
 572                 ip = ipn;
 573                 off = (u_long)TAILQ_NEXT(&ifnet, if_link);
 574         }
 575         if (interface && interesting == NULL)
 576                 errx(1, "%s: unknown interface", interface);
 577         if ((total = malloc(sizeof(struct iftot))) == NULL) {
 578                 printf("malloc failed\n");
 579                 exit(1);
 580         }
 581         memset(total, 0, sizeof(struct iftot));
 582         if ((sum = malloc(sizeof(struct iftot))) == NULL) {
 583                 printf("malloc failed\n");
 584                 exit(1);
 585         }
 586         memset(sum, 0, sizeof(struct iftot));
 587
 588         (void)signal(SIGALRM, catchalarm);
 589         signalled = NO;
 590         interval_it.it_interval.tv_sec = interval1;
 591         interval_it.it_interval.tv_usec = 0;
 592         interval_it.it_value = interval_it.it_interval;
 593         setitimer(ITIMER_REAL, &interval_it, NULL);
 594         first = 1;
 595 banner:
 596         printf("%17s %14s %16s", "input",
 597             interesting ? interesting->ift_name : "(Total)", "output");
 598         putchar('\n');
 599         printf("%10s %5s %5s %10s %10s %5s %10s %5s",
 600             "packets", "errs", "idrops", "bytes", "packets", "errs", "bytes",
 601             "colls");
 602         if (dflag)
 603                 printf(" %5.5s", "drops");
 604         putchar('\n');
 605         fflush(stdout);
 606         line = 0;
 607 loop:
 608         if (interesting != NULL) {
 609                 ip = interesting;
 610                 if (kread(interesting_off, (char *)&ifnet, sizeof ifnet) != 0) {
 611                         printf("???\n");
 612                         exit(1);
 613                 };
 614                 if (!first) {
 615                         show_stat("lu", 10, ifnet.if_ipackets - ip->ift_ip, 1);
 616                         show_stat("lu", 5, ifnet.if_ierrors - ip->ift_ie, 1);
 617                         show_stat("lu", 5, ifnet.if_iqdrops - ip->ift_id, 1);
 618                         show_stat("lu", 10, ifnet.if_ibytes - ip->ift_ib, 1);
 619                         show_stat("lu", 10, ifnet.if_opackets - ip->ift_op, 1);
 620                         show_stat("lu", 5, ifnet.if_oerrors - ip->ift_oe, 1);
 621                         show_stat("lu", 10, ifnet.if_obytes - ip->ift_ob, 1);
 622                         show_stat("NRSlu", 5,
 623                             ifnet.if_collisions - ip->ift_co, 1);
 624                         if (dflag)
 625                                 show_stat("LSu", 5,
 626                                     ifnet.if_snd.ifq_drops - ip->ift_dr, 1);
 627                 }
 628                 ip->ift_ip = ifnet.if_ipackets;
 629                 ip->ift_ie = ifnet.if_ierrors;
 630                 ip->ift_id = ifnet.if_iqdrops;
 631                 ip->ift_ib = ifnet.if_ibytes;
 632                 ip->ift_op = ifnet.if_opackets;
 633                 ip->ift_oe = ifnet.if_oerrors;
 634                 ip->ift_ob = ifnet.if_obytes;
 635                 ip->ift_co = ifnet.if_collisions;
 636                 ip->ift_dr = ifnet.if_snd.ifq_drops;
 637         } else {
 638                 sum->ift_ip = 0;
 639                 sum->ift_ie = 0;
 640                 sum->ift_id = 0;
 641                 sum->ift_ib = 0;
 642                 sum->ift_op = 0;
 643                 sum->ift_oe = 0;
 644                 sum->ift_ob = 0;
 645                 sum->ift_co = 0;
 646                 sum->ift_dr = 0;
 647                 for (off = firstifnet, ip = iftot;
 648                      off && SLIST_NEXT(ip, chain) != NULL;
 649                      ip = SLIST_NEXT(ip, chain)) {
 650                         if (kread(off, (char *)&ifnet, sizeof ifnet) != 0) {
 651                                 off = 0;
 652                                 continue;
 653                         }
 654                         sum->ift_ip += ifnet.if_ipackets;
 655                         sum->ift_ie += ifnet.if_ierrors;
 656                         sum->ift_id += ifnet.if_iqdrops;
 657                         sum->ift_ib += ifnet.if_ibytes;
 658                         sum->ift_op += ifnet.if_opackets;
 659                         sum->ift_oe += ifnet.if_oerrors;
 660                         sum->ift_ob += ifnet.if_obytes;
 661                         sum->ift_co += ifnet.if_collisions;
 662                         sum->ift_dr += ifnet.if_snd.ifq_drops;
 663                         off = (u_long)TAILQ_NEXT(&ifnet, if_link);
 664                 }
 665                 if (!first) {
 666                         show_stat("lu", 10, sum->ift_ip - total->ift_ip, 1);
 667                         show_stat("lu", 5, sum->ift_ie - total->ift_ie, 1);
 668                         show_stat("lu", 5, sum->ift_id - total->ift_id, 1);
 669                         show_stat("lu", 10, sum->ift_ib - total->ift_ib, 1);
 670                         show_stat("lu", 10, sum->ift_op - total->ift_op, 1);
 671                         show_stat("lu", 5, sum->ift_oe - total->ift_oe, 1);
 672                         show_stat("lu", 10, sum->ift_ob - total->ift_ob, 1);
 673                         show_stat("NRSlu", 5, sum->ift_co - total->ift_co, 1);
 674                         if (dflag)
 675                                 show_stat("LSu", 5,
 676                                     sum->ift_dr - total->ift_dr, 1);
 677                 }
 678                 *total = *sum;
 679         }
 680         if (!first)
 681                 putchar('\n');
 682         fflush(stdout);
 683         if ((noutputs != 0) && (--noutputs == 0))
 684                 exit(0);
 685         oldmask = sigblock(sigmask(SIGALRM));
 686         while (!signalled)
 687                 sigpause(0);
 688         signalled = NO;
 689         sigsetmask(oldmask);
 690         line++;
 691         first = 0;
 692         if (line == 21)
 693                 goto banner;
 694         else
 695                 goto loop;
 696         /*NOTREACHED*/
 697 }
 698
 699 /*
 700  * Set a flag to indicate that a signal from the periodic itimer has been
 701  * caught.
 702  */
 703 static void
 704 catchalarm(int signo __unused)
 705 {
 706         signalled = YES;
 707 }