usr.bin/netstat/if.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 2013 Gleb Smirnoff <glebius@FreeBSD.org>
   5  * Copyright (c) 1983, 1988, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #if 0
  34 #ifndef lint
  35 static char sccsid[] = "@(#)if.c        8.3 (Berkeley) 4/28/95";
  36 #endif /* not lint */
  37 #endif
  38
  39 #include <sys/cdefs.h>
  40 __FBSDID("$FreeBSD$");
  41
  42 #include <sys/param.h>
  43 #include <sys/protosw.h>
  44 #include <sys/socket.h>
  45 #include <sys/socketvar.h>
  46 #include <sys/time.h>
  47
  48 #include <net/if.h>
  49 #include <net/if_dl.h>
  50 #include <net/if_types.h>
  51 #include <net/ethernet.h>
  52 #include <netinet/in.h>
  53 #include <netinet/in_var.h>
  54 #include <arpa/inet.h>
  55 #ifdef PF
  56 #include <net/pfvar.h>
  57 #include <net/if_pfsync.h>
  58 #endif
  59
  60 #include <err.h>
  61 #include <errno.h>
  62 #include <ifaddrs.h>
  63 #include <libutil.h>
  64 #ifdef INET6
  65 #include <netdb.h>
  66 #endif
  67 #include <signal.h>
  68 #include <stdbool.h>
  69 #include <stdint.h>
  70 #include <stdio.h>
  71 #include <stdlib.h>
  72 #include <string.h>
  73 #include <sysexits.h>
  74 #include <unistd.h>
  75 #include <libxo/xo.h>
  76
  77 #include "netstat.h"
  78
  79 static void sidewaysintpr(void);
  80
  81 #ifdef PF
  82 static const char* pfsyncacts[] = {
  83         /* PFSYNC_ACT_CLR */            "clear all request",
  84         /* PFSYNC_ACT_INS_1301 */       "13.1 state insert",
  85         /* PFSYNC_ACT_INS_ACK */        "state inserted ack",
  86         /* PFSYNC_ACT_UPD_1301 */       "13.1 state update",
  87         /* PFSYNC_ACT_UPD_C */          "compressed state update",
  88         /* PFSYNC_ACT_UPD_REQ */        "uncompressed state request",
  89         /* PFSYNC_ACT_DEL */            "state delete",
  90         /* PFSYNC_ACT_DEL_C */          "compressed state delete",
  91         /* PFSYNC_ACT_INS_F */          "fragment insert",
  92         /* PFSYNC_ACT_DEL_F */          "fragment delete",
  93         /* PFSYNC_ACT_BUS */            "bulk update mark",
  94         /* PFSYNC_ACT_TDB */            "TDB replay counter update",
  95         /* PFSYNC_ACT_EOF */            "end of frame mark",
  96         /* PFSYNC_ACT_INS_1400 */       "state insert",
  97         /* PFSYNC_ACT_UPD_1400 */       "state update",
  98 };
  99
 100 static const char* pfsyncacts_name[] = {
 101         /* PFSYNC_ACT_CLR */            "clear-all-request",
 102         /* PFSYNC_ACT_INS_1301 */       "state-insert-1301",
 103         /* PFSYNC_ACT_INS_ACK */        "state-inserted-ack",
 104         /* PFSYNC_ACT_UPD_1301 */       "state-update-1301",
 105         /* PFSYNC_ACT_UPD_C */          "compressed-state-update",
 106         /* PFSYNC_ACT_UPD_REQ */        "uncompressed-state-request",
 107         /* PFSYNC_ACT_DEL */            "state-delete",
 108         /* PFSYNC_ACT_DEL_C */          "compressed-state-delete",
 109         /* PFSYNC_ACT_INS_F */          "fragment-insert",
 110         /* PFSYNC_ACT_DEL_F */          "fragment-delete",
 111         /* PFSYNC_ACT_BUS */            "bulk-update-mark",
 112         /* PFSYNC_ACT_TDB */            "TDB-replay-counter-update",
 113         /* PFSYNC_ACT_EOF */            "end-of-frame-mark",
 114         /* PFSYNC_ACT_INS_1400 */       "state-insert",
 115         /* PFSYNC_ACT_UPD_1400 */       "state-update",
 116 };
 117
 118 static void
 119 pfsync_acts_stats(const char *list, const char *desc, uint64_t *a)
 120 {
 121         int i;
 122
 123         xo_open_list(list);
 124         for (i = 0; i < PFSYNC_ACT_MAX; i++, a++) {
 125                 if (*a || sflag <= 1) {
 126                         xo_open_instance(list);
 127                         xo_emit("\t\t{e:name}{:count/%ju} {N:/%s%s %s}\n",
 128                             pfsyncacts_name[i], (uintmax_t)(*a),
 129                             pfsyncacts[i], plural(*a), desc);
 130                         xo_close_instance(list);
 131                 }
 132         }
 133         xo_close_list(list);
 134 }
 135
 136 /*
 137  * Dump pfsync statistics structure.
 138  */
 139 void
 140 pfsync_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
 141 {
 142         struct pfsyncstats pfsyncstat;
 143
 144         if (fetch_stats("net.pfsync.stats", off, &pfsyncstat,
 145             sizeof(pfsyncstat), kread) != 0)
 146                 return;
 147
 148         xo_emit("{T:/%s}:\n", name);
 149         xo_open_container(name);
 150
 151 #define p(f, m) if (pfsyncstat.f || sflag <= 1) \
 152         xo_emit(m, (uintmax_t)pfsyncstat.f, plural(pfsyncstat.f))
 153
 154         p(pfsyncs_ipackets, "\t{:received-inet-packets/%ju} "
 155             "{N:/packet%s received (IPv4)}\n");
 156         p(pfsyncs_ipackets6, "\t{:received-inet6-packets/%ju} "
 157             "{N:/packet%s received (IPv6)}\n");
 158         pfsync_acts_stats("input-histogram", "received",
 159             &pfsyncstat.pfsyncs_iacts[0]);
 160         p(pfsyncs_badif, "\t\t{:dropped-bad-interface/%ju} "
 161             "{N:/packet%s discarded for bad interface}\n");
 162         p(pfsyncs_badttl, "\t\t{:dropped-bad-ttl/%ju} "
 163             "{N:/packet%s discarded for bad ttl}\n");
 164         p(pfsyncs_hdrops, "\t\t{:dropped-short-header/%ju} "
 165             "{N:/packet%s shorter than header}\n");
 166         p(pfsyncs_badver, "\t\t{:dropped-bad-version/%ju} "
 167             "{N:/packet%s discarded for bad version}\n");
 168         p(pfsyncs_badauth, "\t\t{:dropped-bad-auth/%ju} "
 169             "{N:/packet%s discarded for bad HMAC}\n");
 170         p(pfsyncs_badact,"\t\t{:dropped-bad-action/%ju} "
 171             "{N:/packet%s discarded for bad action}\n");
 172         p(pfsyncs_badlen, "\t\t{:dropped-short/%ju} "
 173             "{N:/packet%s discarded for short packet}\n");
 174         p(pfsyncs_badval, "\t\t{:dropped-bad-values/%ju} "
 175             "{N:/state%s discarded for bad values}\n");
 176         p(pfsyncs_stale, "\t\t{:dropped-stale-state/%ju} "
 177             "{N:/stale state%s}\n");
 178         p(pfsyncs_badstate, "\t\t{:dropped-failed-lookup/%ju} "
 179             "{N:/failed state lookup\\/insert%s}\n");
 180         p(pfsyncs_opackets, "\t{:sent-inet-packets/%ju} "
 181             "{N:/packet%s sent (IPv4})\n");
 182         p(pfsyncs_opackets6, "\t{:send-inet6-packets/%ju} "
 183             "{N:/packet%s sent (IPv6})\n");
 184         pfsync_acts_stats("output-histogram", "sent",
 185             &pfsyncstat.pfsyncs_oacts[0]);
 186         p(pfsyncs_onomem, "\t\t{:discarded-no-memory/%ju} "
 187             "{N:/failure%s due to mbuf memory error}\n");
 188         p(pfsyncs_oerrors, "\t\t{:send-errors/%ju} "
 189             "{N:/send error%s}\n");
 190 #undef p
 191         xo_close_container(name);
 192 }
 193 #endif /* PF */
 194
 195 /*
 196  * Display a formatted value, or a '-' in the same space.
 197  */
 198 static void
 199 show_stat(const char *fmt, int width, const char *name,
 200     u_long value, short showvalue, int div1000)
 201 {
 202         const char *lsep, *rsep;
 203         char newfmt[64];
 204
 205         lsep = "";
 206         if (strncmp(fmt, "LS", 2) == 0) {
 207                 lsep = " ";
 208                 fmt += 2;
 209         }
 210         rsep = " ";
 211         if (strncmp(fmt, "NRS", 3) == 0) {
 212                 rsep = "";
 213                 fmt += 3;
 214         }
 215         if (showvalue == 0) {
 216                 /* Print just dash. */
 217                 xo_emit("{P:/%s}{D:/%*s}{P:/%s}", lsep, width, "-", rsep);
 218                 return;
 219         }
 220
 221         /*
 222          * XXX: workaround {P:} modifier can't be empty and doesn't seem to
 223          * take args... so we need to conditionally include it in the format.
 224          */
 225 #define maybe_pad(pad)  do {                                                \
 226         if (strlen(pad)) {                                                  \
 227                 snprintf(newfmt, sizeof(newfmt), "{P:%s}", pad);            \
 228                 xo_emit(newfmt);                                            \
 229         }                                                                   \
 230 } while (0)
 231
 232         if (hflag) {
 233                 char buf[5];
 234
 235                 /* Format in human readable form. */
 236                 humanize_number(buf, sizeof(buf), (int64_t)value, "",
 237                     HN_AUTOSCALE, HN_NOSPACE | HN_DECIMAL | \
 238                     ((div1000) ? HN_DIVISOR_1000 : 0));
 239                 maybe_pad(lsep);
 240                 snprintf(newfmt, sizeof(newfmt), "{:%s/%%%ds}", name, width);
 241                 xo_emit(newfmt, buf);
 242                 maybe_pad(rsep);
 243         } else {
 244                 /* Construct the format string. */
 245                 maybe_pad(lsep);
 246                 snprintf(newfmt, sizeof(newfmt), "{:%s/%%%d%s}",
 247                     name, width, fmt);
 248                 xo_emit(newfmt, value);
 249                 maybe_pad(rsep);
 250         }
 251 }
 252
 253 /*
 254  * Find next multiaddr for a given interface name.
 255  */
 256 static struct ifmaddrs *
 257 next_ifma(struct ifmaddrs *ifma, const char *name, const sa_family_t family)
 258 {
 259
 260         for(; ifma != NULL; ifma = ifma->ifma_next) {
 261                 struct sockaddr_dl *sdl;
 262
 263                 sdl = (struct sockaddr_dl *)ifma->ifma_name;
 264                 if (ifma->ifma_addr->sa_family == family &&
 265                     strcmp(sdl->sdl_data, name) == 0)
 266                         break;
 267         }
 268
 269         return (ifma);
 270 }
 271
 272 enum process_op { MEASURE, EMIT };
 273
 274 static void
 275 process_ifa_addr(enum process_op op, struct ifaddrs *ifa, int *max_net_len,
 276     int *max_addr_len, bool *network, bool *link)
 277 {
 278         int net_len, addr_len;
 279         const char *nn, *rn;
 280
 281         if (op == EMIT) {
 282                 net_len = *max_net_len;
 283                 addr_len = *max_addr_len;
 284         }
 285
 286         switch (ifa->ifa_addr->sa_family) {
 287         case AF_UNSPEC:
 288                 if (op == MEASURE) {
 289                         net_len = strlen("none");
 290                         addr_len = strlen("none");
 291                 } else {
 292                         xo_emit("{:network/%-*.*s}  ", net_len, net_len,
 293                             "none");
 294                         xo_emit("{:address/%-*.*s} ", addr_len, addr_len,
 295                             "none");
 296                 }
 297                 break;
 298         case AF_INET:
 299 #ifdef INET6
 300         case AF_INET6:
 301 #endif /* INET6 */
 302                 nn = netname(ifa->ifa_addr, ifa->ifa_netmask);
 303                 rn = routename(ifa->ifa_addr, numeric_addr);
 304                 if (op == MEASURE) {
 305                         net_len = strlen(nn);
 306                         addr_len = strlen(rn);
 307                 } else {
 308                         xo_emit("{t:network/%-*s}  ", net_len, nn);
 309                         xo_emit("{t:address/%-*s} ", addr_len, rn);
 310                 }
 311
 312                 if (network != NULL)
 313                         *network = true;
 314                 break;
 315         case AF_LINK:
 316             {
 317                 struct sockaddr_dl *sdl;
 318                 char linknum[sizeof("<Link#32767>")];
 319
 320                 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
 321                 snprintf(linknum, sizeof(linknum), "<Link#%d>", sdl->sdl_index);
 322                 if (op == MEASURE) {
 323                         net_len = strlen(linknum);
 324                         if (sdl->sdl_nlen == 0 &&
 325                             sdl->sdl_alen == 0 &&
 326                             sdl->sdl_slen == 0)
 327                                 addr_len = 1;
 328                         else
 329                                 addr_len = strlen(routename(ifa->ifa_addr, 1));
 330                 } else {
 331                         xo_emit("{t:network/%-*.*s}  ", net_len, net_len,
 332                             linknum);
 333                         if (sdl->sdl_nlen == 0 &&
 334                             sdl->sdl_alen == 0 &&
 335                             sdl->sdl_slen == 0)
 336                                 xo_emit("{P:/%*s} ", addr_len, "");
 337                         else
 338                                 xo_emit("{t:address/%-*.*s} ", addr_len,
 339                                     addr_len, routename(ifa->ifa_addr, 1));
 340                 }
 341                 if (link != NULL)
 342                         *link = true;
 343                 break;
 344             }
 345         }
 346
 347         if (op == MEASURE) {
 348                 if (net_len > *max_net_len)
 349                         *max_net_len = net_len;
 350                 if (addr_len > *max_addr_len)
 351                         *max_addr_len = addr_len;
 352         }
 353 }
 354
 355 static int
 356 max_num_len(int max_len, u_long num)
 357 {
 358         int len = 2;            /* include space */
 359
 360         for (; num > 10; len++)
 361                 num /= 10;
 362         return (MAX(max_len, len));
 363 }
 364
 365 /*
 366  * Print a description of the network interfaces.
 367  */
 368 void
 369 intpr(void (*pfunc)(char *), int af)
 370 {
 371         struct ifaddrs *ifap, *ifa;
 372         struct ifmaddrs *ifmap, *ifma;
 373         u_int ifn_len_max = 5, ifn_len;
 374         u_int net_len = strlen("Network "), addr_len = strlen("Address ");
 375         u_int npkt_len = 8, nbyte_len = 10, nerr_len = 5;
 376
 377         if (interval)
 378                 return sidewaysintpr();
 379
 380         if (getifaddrs(&ifap) != 0)
 381                 err(EX_OSERR, "getifaddrs");
 382         if (aflag && getifmaddrs(&ifmap) != 0)
 383                 err(EX_OSERR, "getifmaddrs");
 384
 385         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 386                 if (interface != NULL &&
 387                     strcmp(ifa->ifa_name, interface) != 0)
 388                         continue;
 389                 if (af != AF_UNSPEC && ifa->ifa_addr->sa_family != af)
 390                         continue;
 391                 ifn_len = strlen(ifa->ifa_name);
 392                 if ((ifa->ifa_flags & IFF_UP) == 0)
 393                         ++ifn_len;
 394                 ifn_len_max = MAX(ifn_len_max, ifn_len);
 395                 process_ifa_addr(MEASURE, ifa, &net_len, &addr_len,
 396                     NULL, NULL);
 397
 398 #define IFA_STAT(s)     (((struct if_data *)ifa->ifa_data)->ifi_ ## s)
 399                 if (!hflag) {
 400                         npkt_len = max_num_len(npkt_len, IFA_STAT(ipackets));
 401                         npkt_len = max_num_len(npkt_len, IFA_STAT(opackets));
 402                         nerr_len = max_num_len(nerr_len, IFA_STAT(ierrors));
 403                         nerr_len = max_num_len(nerr_len, IFA_STAT(iqdrops));
 404                         nerr_len = max_num_len(nerr_len, IFA_STAT(collisions));
 405                         if (dflag)
 406                                 nerr_len = max_num_len(nerr_len,
 407                                     IFA_STAT(oqdrops));
 408                         if (bflag) {
 409                                 nbyte_len = max_num_len(nbyte_len,
 410                                     IFA_STAT(ibytes));
 411                                 nbyte_len = max_num_len(nbyte_len,
 412                                     IFA_STAT(obytes));
 413                         }
 414                 }
 415         }
 416
 417         xo_open_list("interface");
 418         if (!pfunc) {
 419                 xo_emit("{T:/%-*.*s}", ifn_len_max, ifn_len_max, "Name");
 420                 xo_emit(" {T:/%5.5s} {T:/%-*.*s}  {T:/%-*.*s} {T:/%*.*s} "
 421                     "{T:/%*.*s} {T:/%*.*s}",
 422                     "Mtu", net_len, net_len, "Network", addr_len, addr_len,
 423                     "Address", npkt_len, npkt_len, "Ipkts",
 424                     nerr_len, nerr_len, "Ierrs", nerr_len, nerr_len, "Idrop");
 425                 if (bflag)
 426                         xo_emit(" {T:/%*.*s}", nbyte_len, nbyte_len, "Ibytes");
 427                 xo_emit(" {T:/%*.*s} {T:/%*.*s}", npkt_len, npkt_len, "Opkts",
 428                     nerr_len, nerr_len, "Oerrs");
 429                 if (bflag)
 430                         xo_emit(" {T:/%*.*s}", nbyte_len, nbyte_len, "Obytes");
 431                 xo_emit(" {T:/%*s}", nerr_len, "Coll");
 432                 if (dflag)
 433                         xo_emit(" {T:/%*.*s}", nerr_len, nerr_len, "Drop");
 434                 xo_emit("\n");
 435         }
 436
 437         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 438                 bool network = false, link = false;
 439                 char *name, *xname, buf[IFNAMSIZ+1];
 440
 441                 if (interface != NULL && strcmp(ifa->ifa_name, interface) != 0)
 442                         continue;
 443
 444                 name = ifa->ifa_name;
 445
 446                 if (pfunc) {
 447
 448                         (*pfunc)(name);
 449
 450                         /*
 451                          * Skip all ifaddrs belonging to same interface.
 452                          */
 453                         while(ifa->ifa_next != NULL &&
 454                             (strcmp(ifa->ifa_next->ifa_name, name) == 0)) {
 455                                 ifa = ifa->ifa_next;
 456                         }
 457                         continue;
 458                 }
 459
 460                 if (af != AF_UNSPEC && ifa->ifa_addr->sa_family != af)
 461                         continue;
 462
 463                 xo_open_instance("interface");
 464
 465                 if ((ifa->ifa_flags & IFF_UP) == 0) {
 466                         xname = stpcpy(buf, name);
 467                         *xname++ = '*';
 468                         *xname = '\0';
 469                         xname = buf;
 470                 } else
 471                         xname = name;
 472
 473                 xo_emit("{d:/%-*.*s}{etk:name}{eq:flags/0x%x}",
 474                     ifn_len_max, ifn_len_max, xname, name, ifa->ifa_flags);
 475
 476 #define IFA_MTU(ifa)    (((struct if_data *)(ifa)->ifa_data)->ifi_mtu)
 477                 show_stat("lu", 6, "mtu", IFA_MTU(ifa), IFA_MTU(ifa), 0);
 478 #undef IFA_MTU
 479
 480                 process_ifa_addr(EMIT, ifa, &net_len, &addr_len,
 481                     &network, &link);
 482
 483                 show_stat("lu", npkt_len, "received-packets",
 484                     IFA_STAT(ipackets), link|network, 1);
 485                 show_stat("lu", nerr_len, "received-errors", IFA_STAT(ierrors),
 486                     link, 1);
 487                 show_stat("lu", nerr_len, "dropped-packets", IFA_STAT(iqdrops),
 488                     link, 1);
 489                 if (bflag)
 490                         show_stat("lu", nbyte_len, "received-bytes",
 491                             IFA_STAT(ibytes), link|network, 0);
 492                 show_stat("lu", npkt_len, "sent-packets", IFA_STAT(opackets),
 493                     link|network, 1);
 494                 show_stat("lu", nerr_len, "send-errors", IFA_STAT(oerrors),
 495                     link, 1);
 496                 if (bflag)
 497                         show_stat("lu", nbyte_len, "sent-bytes",
 498                             IFA_STAT(obytes), link|network, 0);
 499                 show_stat("NRSlu", nerr_len, "collisions", IFA_STAT(collisions),
 500                     link, 1);
 501                 if (dflag)
 502                         show_stat("LSlu", nerr_len, "dropped-packets",
 503                             IFA_STAT(oqdrops), link, 1);
 504                 xo_emit("\n");
 505
 506                 if (!aflag) {
 507                         xo_close_instance("interface");
 508                         continue;
 509                 }
 510
 511                 /*
 512                  * Print family's multicast addresses.
 513                  */
 514                 xo_open_list("multicast-address");
 515                 for (ifma = next_ifma(ifmap, ifa->ifa_name,
 516                     ifa->ifa_addr->sa_family);
 517                     ifma != NULL;
 518                     ifma = next_ifma(ifma, ifa->ifa_name,
 519                     ifa->ifa_addr->sa_family)) {
 520                         const char *fmt = NULL;
 521
 522                         xo_open_instance("multicast-address");
 523                         switch (ifma->ifma_addr->sa_family) {
 524                         case AF_LINK:
 525                             {
 526                                 struct sockaddr_dl *sdl;
 527
 528                                 sdl = (struct sockaddr_dl *)ifma->ifma_addr;
 529                                 if (sdl->sdl_type != IFT_ETHER &&
 530                                     sdl->sdl_type != IFT_FDDI)
 531                                         break;
 532                             }
 533                                 /* FALLTHROUGH */
 534                         case AF_INET:
 535 #ifdef INET6
 536                         case AF_INET6:
 537 #endif /* INET6 */
 538                                 fmt = routename(ifma->ifma_addr, numeric_addr);
 539                                 break;
 540                         }
 541                         if (fmt) {
 542                                 if (Wflag)
 543                                         xo_emit("{P:/%27s }"
 544                                             "{t:address/%-17s/}", "", fmt);
 545                                 else
 546                                         xo_emit("{P:/%25s }"
 547                                             "{t:address/%-17.17s/}", "", fmt);
 548                                 if (ifma->ifma_addr->sa_family == AF_LINK) {
 549                                         xo_emit(" {:received-packets/%8lu}",
 550                                             IFA_STAT(imcasts));
 551                                         xo_emit("{P:/%*s}", bflag? 17 : 6, "");
 552                                         xo_emit(" {:sent-packets/%8lu}",
 553                                             IFA_STAT(omcasts));
 554                                 }
 555                                 xo_emit("\n");
 556                         }
 557                         xo_close_instance("multicast-address");
 558                         ifma = ifma->ifma_next;
 559                 }
 560                 xo_close_list("multicast-address");
 561                 xo_close_instance("interface");
 562         }
 563         xo_close_list("interface");
 564
 565         freeifaddrs(ifap);
 566         if (aflag)
 567                 freeifmaddrs(ifmap);
 568 }
 569
 570 struct iftot {
 571         u_long  ift_ip;                 /* input packets */
 572         u_long  ift_ie;                 /* input errors */
 573         u_long  ift_id;                 /* input drops */
 574         u_long  ift_op;                 /* output packets */
 575         u_long  ift_oe;                 /* output errors */
 576         u_long  ift_od;                 /* output drops */
 577         u_long  ift_co;                 /* collisions */
 578         u_long  ift_ib;                 /* input bytes */
 579         u_long  ift_ob;                 /* output bytes */
 580 };
 581
 582 /*
 583  * Obtain stats for interface(s).
 584  */
 585 static void
 586 fill_iftot(struct iftot *st)
 587 {
 588         struct ifaddrs *ifap, *ifa;
 589         bool found = false;
 590
 591         if (getifaddrs(&ifap) != 0)
 592                 xo_err(EX_OSERR, "getifaddrs");
 593
 594         bzero(st, sizeof(*st));
 595
 596         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 597                 if (ifa->ifa_addr->sa_family != AF_LINK)
 598                         continue;
 599                 if (interface) {
 600                         if (strcmp(ifa->ifa_name, interface) == 0)
 601                                 found = true;
 602                         else
 603                                 continue;
 604                 }
 605
 606                 st->ift_ip += IFA_STAT(ipackets);
 607                 st->ift_ie += IFA_STAT(ierrors);
 608                 st->ift_id += IFA_STAT(iqdrops);
 609                 st->ift_ib += IFA_STAT(ibytes);
 610                 st->ift_op += IFA_STAT(opackets);
 611                 st->ift_oe += IFA_STAT(oerrors);
 612                 st->ift_od += IFA_STAT(oqdrops);
 613                 st->ift_ob += IFA_STAT(obytes);
 614                 st->ift_co += IFA_STAT(collisions);
 615         }
 616
 617         if (interface && found == false)
 618                 xo_err(EX_DATAERR, "interface %s not found", interface);
 619
 620         freeifaddrs(ifap);
 621 }
 622
 623 /*
 624  * Set a flag to indicate that a signal from the periodic itimer has been
 625  * caught.
 626  */
 627 static sig_atomic_t signalled;
 628 static void
 629 catchalarm(int signo __unused)
 630 {
 631         signalled = true;
 632 }
 633
 634 /*
 635  * Print a running summary of interface statistics.
 636  * Repeat display every interval seconds, showing statistics
 637  * collected over that interval.  Assumes that interval is non-zero.
 638  * First line printed at top of screen is always cumulative.
 639  */
 640 static void
 641 sidewaysintpr(void)
 642 {
 643         struct iftot ift[2], *new, *old;
 644         struct itimerval interval_it;
 645         int oldmask, line;
 646
 647         new = &ift[0];
 648         old = &ift[1];
 649         fill_iftot(old);
 650
 651         (void)signal(SIGALRM, catchalarm);
 652         signalled = false;
 653         interval_it.it_interval.tv_sec = interval;
 654         interval_it.it_interval.tv_usec = 0;
 655         interval_it.it_value = interval_it.it_interval;
 656         setitimer(ITIMER_REAL, &interval_it, NULL);
 657         xo_open_list("interface-statistics");
 658
 659 banner:
 660         xo_emit("{T:/%17s} {T:/%14s} {T:/%16s}\n", "input",
 661             interface != NULL ? interface : "(Total)", "output");
 662         xo_emit("{T:/%10s} {T:/%5s} {T:/%5s} {T:/%10s} {T:/%10s} {T:/%5s} "
 663             "{T:/%10s} {T:/%5s}",
 664             "packets", "errs", "idrops", "bytes", "packets", "errs", "bytes",
 665             "colls");
 666         if (dflag)
 667                 xo_emit(" {T:/%5.5s}", "drops");
 668         xo_emit("\n");
 669         xo_flush();
 670         line = 0;
 671
 672 loop:
 673         if ((noutputs != 0) && (--noutputs == 0)) {
 674                 xo_close_list("interface-statistics");
 675                 return;
 676         }
 677         oldmask = sigblock(sigmask(SIGALRM));
 678         while (!signalled)
 679                 sigpause(0);
 680         signalled = false;
 681         sigsetmask(oldmask);
 682         line++;
 683
 684         fill_iftot(new);
 685
 686         xo_open_instance("stats");
 687         show_stat("lu", 10, "received-packets",
 688             new->ift_ip - old->ift_ip, 1, 1);
 689         show_stat("lu", 5, "received-errors",
 690             new->ift_ie - old->ift_ie, 1, 1);
 691         show_stat("lu", 5, "dropped-packets",
 692             new->ift_id - old->ift_id, 1, 1);
 693         show_stat("lu", 10, "received-bytes",
 694             new->ift_ib - old->ift_ib, 1, 0);
 695         show_stat("lu", 10, "sent-packets",
 696             new->ift_op - old->ift_op, 1, 1);
 697         show_stat("lu", 5, "send-errors",
 698             new->ift_oe - old->ift_oe, 1, 1);
 699         show_stat("lu", 10, "sent-bytes",
 700             new->ift_ob - old->ift_ob, 1, 0);
 701         show_stat("NRSlu", 5, "collisions",
 702             new->ift_co - old->ift_co, 1, 1);
 703         if (dflag)
 704                 show_stat("LSlu", 5, "dropped-packets",
 705                     new->ift_od - old->ift_od, 1, 1);
 706         xo_close_instance("stats");
 707         xo_emit("\n");
 708         xo_flush();
 709
 710         if (new == &ift[0]) {
 711                 new = &ift[1];
 712                 old = &ift[0];
 713         } else {
 714                 new = &ift[0];
 715                 old = &ift[1];
 716         }
 717
 718         if (line == 21)
 719                 goto banner;
 720         else
 721                 goto loop;
 722
 723         /* NOTREACHED */
 724 }