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 #include <sys/param.h>
  34 #include <sys/protosw.h>
  35 #include <sys/socket.h>
  36 #include <sys/socketvar.h>
  37 #include <sys/time.h>
  38
  39 #include <net/if.h>
  40 #include <net/if_dl.h>
  41 #include <net/if_types.h>
  42 #include <net/ethernet.h>
  43 #include <netinet/in.h>
  44 #include <netinet/in_var.h>
  45 #include <arpa/inet.h>
  46 #ifdef PF
  47 #include <net/pfvar.h>
  48 #include <net/pflow.h>
  49 #include <net/if_pfsync.h>
  50 #endif
  51
  52 #include <err.h>
  53 #include <errno.h>
  54 #include <ifaddrs.h>
  55 #include <libutil.h>
  56 #ifdef INET6
  57 #include <netdb.h>
  58 #endif
  59 #include <signal.h>
  60 #include <stdbool.h>
  61 #include <stdint.h>
  62 #include <stdio.h>
  63 #include <stdlib.h>
  64 #include <string.h>
  65 #include <sysexits.h>
  66 #include <unistd.h>
  67 #include <libxo/xo.h>
  68
  69 #include "netstat.h"
  70
  71 static void sidewaysintpr(void);
  72
  73 #ifdef PF
  74 static const char* pfsyncacts[] = {
  75         /* PFSYNC_ACT_CLR */            "clear all request",
  76         /* PFSYNC_ACT_INS_1301 */       "13.1 state insert",
  77         /* PFSYNC_ACT_INS_ACK */        "state inserted ack",
  78         /* PFSYNC_ACT_UPD_1301 */       "13.1 state update",
  79         /* PFSYNC_ACT_UPD_C */          "compressed state update",
  80         /* PFSYNC_ACT_UPD_REQ */        "uncompressed state request",
  81         /* PFSYNC_ACT_DEL */            "state delete",
  82         /* PFSYNC_ACT_DEL_C */          "compressed state delete",
  83         /* PFSYNC_ACT_INS_F */          "fragment insert",
  84         /* PFSYNC_ACT_DEL_F */          "fragment delete",
  85         /* PFSYNC_ACT_BUS */            "bulk update mark",
  86         /* PFSYNC_ACT_TDB */            "TDB replay counter update",
  87         /* PFSYNC_ACT_EOF */            "end of frame mark",
  88         /* PFSYNC_ACT_INS_1400 */       "state insert",
  89         /* PFSYNC_ACT_UPD_1400 */       "state update",
  90 };
  91
  92 static const char* pfsyncacts_name[] = {
  93         /* PFSYNC_ACT_CLR */            "clear-all-request",
  94         /* PFSYNC_ACT_INS_1301 */       "state-insert-1301",
  95         /* PFSYNC_ACT_INS_ACK */        "state-inserted-ack",
  96         /* PFSYNC_ACT_UPD_1301 */       "state-update-1301",
  97         /* PFSYNC_ACT_UPD_C */          "compressed-state-update",
  98         /* PFSYNC_ACT_UPD_REQ */        "uncompressed-state-request",
  99         /* PFSYNC_ACT_DEL */            "state-delete",
 100         /* PFSYNC_ACT_DEL_C */          "compressed-state-delete",
 101         /* PFSYNC_ACT_INS_F */          "fragment-insert",
 102         /* PFSYNC_ACT_DEL_F */          "fragment-delete",
 103         /* PFSYNC_ACT_BUS */            "bulk-update-mark",
 104         /* PFSYNC_ACT_TDB */            "TDB-replay-counter-update",
 105         /* PFSYNC_ACT_EOF */            "end-of-frame-mark",
 106         /* PFSYNC_ACT_INS_1400 */       "state-insert",
 107         /* PFSYNC_ACT_UPD_1400 */       "state-update",
 108 };
 109
 110 static void
 111 pfsync_acts_stats(const char *list, const char *desc, uint64_t *a)
 112 {
 113         int i;
 114
 115         xo_open_list(list);
 116         for (i = 0; i < PFSYNC_ACT_MAX; i++, a++) {
 117                 if (*a || sflag <= 1) {
 118                         xo_open_instance(list);
 119                         xo_emit("\t\t{e:name}{:count/%ju} {N:/%s%s %s}\n",
 120                             pfsyncacts_name[i], (uintmax_t)(*a),
 121                             pfsyncacts[i], plural(*a), desc);
 122                         xo_close_instance(list);
 123                 }
 124         }
 125         xo_close_list(list);
 126 }
 127
 128 /*
 129  * Dump pfsync statistics structure.
 130  */
 131 void
 132 pfsync_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
 133 {
 134         struct pfsyncstats pfsyncstat;
 135
 136         if (fetch_stats("net.pfsync.stats", off, &pfsyncstat,
 137             sizeof(pfsyncstat), kread) != 0)
 138                 return;
 139
 140         xo_emit("{T:/%s}:\n", name);
 141         xo_open_container(name);
 142
 143 #define p(f, m) if (pfsyncstat.f || sflag <= 1) \
 144         xo_emit(m, (uintmax_t)pfsyncstat.f, plural(pfsyncstat.f))
 145
 146         p(pfsyncs_ipackets, "\t{:received-inet-packets/%ju} "
 147             "{N:/packet%s received (IPv4)}\n");
 148         p(pfsyncs_ipackets6, "\t{:received-inet6-packets/%ju} "
 149             "{N:/packet%s received (IPv6)}\n");
 150         pfsync_acts_stats("input-histogram", "received",
 151             &pfsyncstat.pfsyncs_iacts[0]);
 152         p(pfsyncs_badif, "\t\t{:dropped-bad-interface/%ju} "
 153             "{N:/packet%s discarded for bad interface}\n");
 154         p(pfsyncs_badttl, "\t\t{:dropped-bad-ttl/%ju} "
 155             "{N:/packet%s discarded for bad ttl}\n");
 156         p(pfsyncs_hdrops, "\t\t{:dropped-short-header/%ju} "
 157             "{N:/packet%s shorter than header}\n");
 158         p(pfsyncs_badver, "\t\t{:dropped-bad-version/%ju} "
 159             "{N:/packet%s discarded for bad version}\n");
 160         p(pfsyncs_badauth, "\t\t{:dropped-bad-auth/%ju} "
 161             "{N:/packet%s discarded for bad HMAC}\n");
 162         p(pfsyncs_badact,"\t\t{:dropped-bad-action/%ju} "
 163             "{N:/packet%s discarded for bad action}\n");
 164         p(pfsyncs_badlen, "\t\t{:dropped-short/%ju} "
 165             "{N:/packet%s discarded for short packet}\n");
 166         p(pfsyncs_badval, "\t\t{:dropped-bad-values/%ju} "
 167             "{N:/state%s discarded for bad values}\n");
 168         p(pfsyncs_stale, "\t\t{:dropped-stale-state/%ju} "
 169             "{N:/stale state%s}\n");
 170         p(pfsyncs_badstate, "\t\t{:dropped-failed-lookup/%ju} "
 171             "{N:/failed state lookup\\/insert%s}\n");
 172         p(pfsyncs_opackets, "\t{:sent-inet-packets/%ju} "
 173             "{N:/packet%s sent (IPv4})\n");
 174         p(pfsyncs_opackets6, "\t{:send-inet6-packets/%ju} "
 175             "{N:/packet%s sent (IPv6})\n");
 176         pfsync_acts_stats("output-histogram", "sent",
 177             &pfsyncstat.pfsyncs_oacts[0]);
 178         p(pfsyncs_onomem, "\t\t{:discarded-no-memory/%ju} "
 179             "{N:/failure%s due to mbuf memory error}\n");
 180         p(pfsyncs_oerrors, "\t\t{:send-errors/%ju} "
 181             "{N:/send error%s}\n");
 182 #undef p
 183         xo_close_container(name);
 184 }
 185
 186 void
 187 pflow_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
 188 {
 189         struct pflowstats pflowstat;
 190
 191         if (fetch_stats("net.pflow.stats", off, &pflowstat,
 192             sizeof(pflowstat), kread) != 0)
 193                 return;
 194
 195         xo_emit("{T:/%s}:\n", name);
 196         xo_open_container(name);
 197
 198 #define p(f, m) if (pflowstat.f || sflag <= 1) \
 199         xo_emit(m, (uintmax_t)pflowstat.f, plural(pflowstat.f))
 200
 201         p(pflow_flows, "\t{:flows/%ju} {N:/flow%s sent}\n");
 202         p(pflow_packets, "\t{:packets/%ju} {N:/packet%s sent}\n");
 203         p(pflow_onomem, "\t{:nomem/%ju} "
 204             "{N:/send failed due to mbuf memory error}\n");
 205         p(pflow_oerrors, "\t{:send-error/%ju} {N:/send error}\n");
 206 #undef p
 207
 208         xo_close_container(name);
 209 }
 210 #endif /* PF */
 211
 212 /*
 213  * Display a formatted value, or a '-' in the same space.
 214  */
 215 static void
 216 show_stat(const char *fmt, int width, const char *name,
 217     u_long value, short showvalue, int div1000)
 218 {
 219         const char *lsep, *rsep;
 220         char newfmt[64];
 221
 222         lsep = "";
 223         if (strncmp(fmt, "LS", 2) == 0) {
 224                 lsep = " ";
 225                 fmt += 2;
 226         }
 227         rsep = " ";
 228         if (strncmp(fmt, "NRS", 3) == 0) {
 229                 rsep = "";
 230                 fmt += 3;
 231         }
 232         if (showvalue == 0) {
 233                 /* Print just dash. */
 234                 xo_emit("{P:/%s}{D:/%*s}{P:/%s}", lsep, width, "-", rsep);
 235                 return;
 236         }
 237
 238         /*
 239          * XXX: workaround {P:} modifier can't be empty and doesn't seem to
 240          * take args... so we need to conditionally include it in the format.
 241          */
 242 #define maybe_pad(pad)  do {                                                \
 243         if (strlen(pad)) {                                                  \
 244                 snprintf(newfmt, sizeof(newfmt), "{P:%s}", pad);            \
 245                 xo_emit(newfmt);                                            \
 246         }                                                                   \
 247 } while (0)
 248
 249         if (hflag) {
 250                 char buf[5];
 251
 252                 /* Format in human readable form. */
 253                 humanize_number(buf, sizeof(buf), (int64_t)value, "",
 254                     HN_AUTOSCALE, HN_NOSPACE | HN_DECIMAL | \
 255                     ((div1000) ? HN_DIVISOR_1000 : 0));
 256                 maybe_pad(lsep);
 257                 snprintf(newfmt, sizeof(newfmt), "{:%s/%%%ds}", name, width);
 258                 xo_emit(newfmt, buf);
 259                 maybe_pad(rsep);
 260         } else {
 261                 /* Construct the format string. */
 262                 maybe_pad(lsep);
 263                 snprintf(newfmt, sizeof(newfmt), "{:%s/%%%d%s}",
 264                     name, width, fmt);
 265                 xo_emit(newfmt, value);
 266                 maybe_pad(rsep);
 267         }
 268 }
 269
 270 /*
 271  * Find next multiaddr for a given interface name.
 272  */
 273 static struct ifmaddrs *
 274 next_ifma(struct ifmaddrs *ifma, const char *name, const sa_family_t family)
 275 {
 276
 277         for(; ifma != NULL; ifma = ifma->ifma_next) {
 278                 struct sockaddr_dl *sdl;
 279
 280                 sdl = (struct sockaddr_dl *)ifma->ifma_name;
 281                 if (ifma->ifma_addr->sa_family == family &&
 282                     strcmp(sdl->sdl_data, name) == 0)
 283                         break;
 284         }
 285
 286         return (ifma);
 287 }
 288
 289 enum process_op { MEASURE, EMIT };
 290
 291 static void
 292 process_ifa_addr(enum process_op op, struct ifaddrs *ifa, int *max_net_len,
 293     int *max_addr_len, bool *network, bool *link)
 294 {
 295         int net_len, addr_len;
 296         const char *nn, *rn;
 297
 298         if (op == EMIT) {
 299                 net_len = *max_net_len;
 300                 addr_len = *max_addr_len;
 301         }
 302
 303         switch (ifa->ifa_addr->sa_family) {
 304         case AF_UNSPEC:
 305                 if (op == MEASURE) {
 306                         net_len = strlen("none");
 307                         addr_len = strlen("none");
 308                 } else {
 309                         xo_emit("{:network/%-*.*s}  ", net_len, net_len,
 310                             "none");
 311                         xo_emit("{:address/%-*.*s} ", addr_len, addr_len,
 312                             "none");
 313                 }
 314                 break;
 315         case AF_INET:
 316 #ifdef INET6
 317         case AF_INET6:
 318 #endif /* INET6 */
 319                 nn = netname(ifa->ifa_addr, ifa->ifa_netmask);
 320                 rn = routename(ifa->ifa_addr, numeric_addr);
 321                 if (op == MEASURE) {
 322                         net_len = strlen(nn);
 323                         addr_len = strlen(rn);
 324                 } else {
 325                         xo_emit("{t:network/%-*s}  ", net_len, nn);
 326                         xo_emit("{t:address/%-*s} ", addr_len, rn);
 327                 }
 328
 329                 if (network != NULL)
 330                         *network = true;
 331                 break;
 332         case AF_LINK:
 333             {
 334                 struct sockaddr_dl *sdl;
 335                 char linknum[sizeof("<Link#32767>")];
 336
 337                 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
 338                 snprintf(linknum, sizeof(linknum), "<Link#%d>", sdl->sdl_index);
 339                 if (op == MEASURE) {
 340                         net_len = strlen(linknum);
 341                         if (sdl->sdl_nlen == 0 &&
 342                             sdl->sdl_alen == 0 &&
 343                             sdl->sdl_slen == 0)
 344                                 addr_len = 1;
 345                         else
 346                                 addr_len = strlen(routename(ifa->ifa_addr, 1));
 347                 } else {
 348                         xo_emit("{t:network/%-*.*s}  ", net_len, net_len,
 349                             linknum);
 350                         if (sdl->sdl_nlen == 0 &&
 351                             sdl->sdl_alen == 0 &&
 352                             sdl->sdl_slen == 0)
 353                                 xo_emit("{P:/%*s} ", addr_len, "");
 354                         else
 355                                 xo_emit("{t:address/%-*.*s} ", addr_len,
 356                                     addr_len, routename(ifa->ifa_addr, 1));
 357                 }
 358                 if (link != NULL)
 359                         *link = true;
 360                 break;
 361             }
 362         }
 363
 364         if (op == MEASURE) {
 365                 if (net_len > *max_net_len)
 366                         *max_net_len = net_len;
 367                 if (addr_len > *max_addr_len)
 368                         *max_addr_len = addr_len;
 369         }
 370 }
 371
 372 static int
 373 max_num_len(int max_len, u_long num)
 374 {
 375         int len = 2;            /* include space */
 376
 377         for (; num > 10; len++)
 378                 num /= 10;
 379         return (MAX(max_len, len));
 380 }
 381
 382 /*
 383  * Print a description of the network interfaces.
 384  */
 385 void
 386 intpr(void (*pfunc)(char *), int af)
 387 {
 388         struct ifaddrs *ifap, *ifa;
 389         struct ifmaddrs *ifmap, *ifma;
 390         u_int ifn_len_max = 5, ifn_len;
 391         u_int net_len = strlen("Network "), addr_len = strlen("Address ");
 392         u_int npkt_len = 8, nbyte_len = 10, nerr_len = 5;
 393
 394         if (interval)
 395                 return sidewaysintpr();
 396
 397         if (getifaddrs(&ifap) != 0)
 398                 err(EX_OSERR, "getifaddrs");
 399         if (aflag && getifmaddrs(&ifmap) != 0)
 400                 err(EX_OSERR, "getifmaddrs");
 401
 402         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 403                 if (interface != NULL &&
 404                     strcmp(ifa->ifa_name, interface) != 0)
 405                         continue;
 406                 if (af != AF_UNSPEC && ifa->ifa_addr->sa_family != af)
 407                         continue;
 408                 ifn_len = strlen(ifa->ifa_name);
 409                 if ((ifa->ifa_flags & IFF_UP) == 0)
 410                         ++ifn_len;
 411                 ifn_len_max = MAX(ifn_len_max, ifn_len);
 412                 process_ifa_addr(MEASURE, ifa, &net_len, &addr_len,
 413                     NULL, NULL);
 414
 415 #define IFA_STAT(s)     (((struct if_data *)ifa->ifa_data)->ifi_ ## s)
 416                 if (!hflag) {
 417                         npkt_len = max_num_len(npkt_len, IFA_STAT(ipackets));
 418                         npkt_len = max_num_len(npkt_len, IFA_STAT(opackets));
 419                         nerr_len = max_num_len(nerr_len, IFA_STAT(ierrors));
 420                         nerr_len = max_num_len(nerr_len, IFA_STAT(iqdrops));
 421                         nerr_len = max_num_len(nerr_len, IFA_STAT(collisions));
 422                         if (dflag)
 423                                 nerr_len = max_num_len(nerr_len,
 424                                     IFA_STAT(oqdrops));
 425                         if (bflag) {
 426                                 nbyte_len = max_num_len(nbyte_len,
 427                                     IFA_STAT(ibytes));
 428                                 nbyte_len = max_num_len(nbyte_len,
 429                                     IFA_STAT(obytes));
 430                         }
 431                 }
 432         }
 433
 434         xo_open_list("interface");
 435         if (!pfunc) {
 436                 xo_emit("{T:/%-*.*s}", ifn_len_max, ifn_len_max, "Name");
 437                 xo_emit(" {T:/%5.5s} {T:/%-*.*s}  {T:/%-*.*s} {T:/%*.*s} "
 438                     "{T:/%*.*s} {T:/%*.*s}",
 439                     "Mtu", net_len, net_len, "Network", addr_len, addr_len,
 440                     "Address", npkt_len, npkt_len, "Ipkts",
 441                     nerr_len, nerr_len, "Ierrs", nerr_len, nerr_len, "Idrop");
 442                 if (bflag)
 443                         xo_emit(" {T:/%*.*s}", nbyte_len, nbyte_len, "Ibytes");
 444                 xo_emit(" {T:/%*.*s} {T:/%*.*s}", npkt_len, npkt_len, "Opkts",
 445                     nerr_len, nerr_len, "Oerrs");
 446                 if (bflag)
 447                         xo_emit(" {T:/%*.*s}", nbyte_len, nbyte_len, "Obytes");
 448                 xo_emit(" {T:/%*s}", nerr_len, "Coll");
 449                 if (dflag)
 450                         xo_emit(" {T:/%*.*s}", nerr_len, nerr_len, "Drop");
 451                 xo_emit("\n");
 452         }
 453
 454         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 455                 bool network = false, link = false;
 456                 char *name, *xname, buf[IFNAMSIZ+1];
 457
 458                 if (interface != NULL && strcmp(ifa->ifa_name, interface) != 0)
 459                         continue;
 460
 461                 name = ifa->ifa_name;
 462
 463                 if (pfunc) {
 464
 465                         (*pfunc)(name);
 466
 467                         /*
 468                          * Skip all ifaddrs belonging to same interface.
 469                          */
 470                         while(ifa->ifa_next != NULL &&
 471                             (strcmp(ifa->ifa_next->ifa_name, name) == 0)) {
 472                                 ifa = ifa->ifa_next;
 473                         }
 474                         continue;
 475                 }
 476
 477                 if (af != AF_UNSPEC && ifa->ifa_addr->sa_family != af)
 478                         continue;
 479
 480                 xo_open_instance("interface");
 481
 482                 if ((ifa->ifa_flags & IFF_UP) == 0) {
 483                         xname = stpcpy(buf, name);
 484                         *xname++ = '*';
 485                         *xname = '\0';
 486                         xname = buf;
 487                 } else
 488                         xname = name;
 489
 490                 xo_emit("{d:/%-*.*s}{etk:name}{eq:flags/0x%x}",
 491                     ifn_len_max, ifn_len_max, xname, name, ifa->ifa_flags);
 492
 493 #define IFA_MTU(ifa)    (((struct if_data *)(ifa)->ifa_data)->ifi_mtu)
 494                 show_stat("lu", 6, "mtu", IFA_MTU(ifa), IFA_MTU(ifa), 0);
 495 #undef IFA_MTU
 496
 497                 process_ifa_addr(EMIT, ifa, &net_len, &addr_len,
 498                     &network, &link);
 499
 500                 show_stat("lu", npkt_len, "received-packets",
 501                     IFA_STAT(ipackets), link|network, 1);
 502                 show_stat("lu", nerr_len, "received-errors", IFA_STAT(ierrors),
 503                     link, 1);
 504                 show_stat("lu", nerr_len, "dropped-packets", IFA_STAT(iqdrops),
 505                     link, 1);
 506                 if (bflag)
 507                         show_stat("lu", nbyte_len, "received-bytes",
 508                             IFA_STAT(ibytes), link|network, 0);
 509                 show_stat("lu", npkt_len, "sent-packets", IFA_STAT(opackets),
 510                     link|network, 1);
 511                 show_stat("lu", nerr_len, "send-errors", IFA_STAT(oerrors),
 512                     link, 1);
 513                 if (bflag)
 514                         show_stat("lu", nbyte_len, "sent-bytes",
 515                             IFA_STAT(obytes), link|network, 0);
 516                 show_stat("NRSlu", nerr_len, "collisions", IFA_STAT(collisions),
 517                     link, 1);
 518                 if (dflag)
 519                         show_stat("LSlu", nerr_len, "dropped-packets",
 520                             IFA_STAT(oqdrops), link, 1);
 521                 xo_emit("\n");
 522
 523                 if (!aflag) {
 524                         xo_close_instance("interface");
 525                         continue;
 526                 }
 527
 528                 /*
 529                  * Print family's multicast addresses.
 530                  */
 531                 xo_open_list("multicast-address");
 532                 for (ifma = next_ifma(ifmap, ifa->ifa_name,
 533                     ifa->ifa_addr->sa_family);
 534                     ifma != NULL;
 535                     ifma = next_ifma(ifma, ifa->ifa_name,
 536                     ifa->ifa_addr->sa_family)) {
 537                         const char *fmt = NULL;
 538
 539                         xo_open_instance("multicast-address");
 540                         switch (ifma->ifma_addr->sa_family) {
 541                         case AF_LINK:
 542                             {
 543                                 struct sockaddr_dl *sdl;
 544
 545                                 sdl = (struct sockaddr_dl *)ifma->ifma_addr;
 546                                 if (sdl->sdl_type != IFT_ETHER &&
 547                                     sdl->sdl_type != IFT_FDDI)
 548                                         break;
 549                             }
 550                                 /* FALLTHROUGH */
 551                         case AF_INET:
 552 #ifdef INET6
 553                         case AF_INET6:
 554 #endif /* INET6 */
 555                                 fmt = routename(ifma->ifma_addr, numeric_addr);
 556                                 break;
 557                         }
 558                         if (fmt) {
 559                                 if (Wflag)
 560                                         xo_emit("{P:/%27s }"
 561                                             "{t:address/%-17s/}", "", fmt);
 562                                 else
 563                                         xo_emit("{P:/%25s }"
 564                                             "{t:address/%-17.17s/}", "", fmt);
 565                                 if (ifma->ifma_addr->sa_family == AF_LINK) {
 566                                         xo_emit(" {:received-packets/%8lu}",
 567                                             IFA_STAT(imcasts));
 568                                         xo_emit("{P:/%*s}", bflag? 17 : 6, "");
 569                                         xo_emit(" {:sent-packets/%8lu}",
 570                                             IFA_STAT(omcasts));
 571                                 }
 572                                 xo_emit("\n");
 573                         }
 574                         xo_close_instance("multicast-address");
 575                         ifma = ifma->ifma_next;
 576                 }
 577                 xo_close_list("multicast-address");
 578                 xo_close_instance("interface");
 579         }
 580         xo_close_list("interface");
 581
 582         freeifaddrs(ifap);
 583         if (aflag)
 584                 freeifmaddrs(ifmap);
 585 }
 586
 587 struct iftot {
 588         u_long  ift_ip;                 /* input packets */
 589         u_long  ift_ie;                 /* input errors */
 590         u_long  ift_id;                 /* input drops */
 591         u_long  ift_op;                 /* output packets */
 592         u_long  ift_oe;                 /* output errors */
 593         u_long  ift_od;                 /* output drops */
 594         u_long  ift_co;                 /* collisions */
 595         u_long  ift_ib;                 /* input bytes */
 596         u_long  ift_ob;                 /* output bytes */
 597 };
 598
 599 /*
 600  * Obtain stats for interface(s).
 601  */
 602 static void
 603 fill_iftot(struct iftot *st)
 604 {
 605         struct ifaddrs *ifap, *ifa;
 606         bool found = false;
 607
 608         if (getifaddrs(&ifap) != 0)
 609                 xo_err(EX_OSERR, "getifaddrs");
 610
 611         bzero(st, sizeof(*st));
 612
 613         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 614                 if (ifa->ifa_addr->sa_family != AF_LINK)
 615                         continue;
 616                 if (interface) {
 617                         if (strcmp(ifa->ifa_name, interface) == 0)
 618                                 found = true;
 619                         else
 620                                 continue;
 621                 }
 622
 623                 st->ift_ip += IFA_STAT(ipackets);
 624                 st->ift_ie += IFA_STAT(ierrors);
 625                 st->ift_id += IFA_STAT(iqdrops);
 626                 st->ift_ib += IFA_STAT(ibytes);
 627                 st->ift_op += IFA_STAT(opackets);
 628                 st->ift_oe += IFA_STAT(oerrors);
 629                 st->ift_od += IFA_STAT(oqdrops);
 630                 st->ift_ob += IFA_STAT(obytes);
 631                 st->ift_co += IFA_STAT(collisions);
 632         }
 633
 634         if (interface && found == false)
 635                 xo_err(EX_DATAERR, "interface %s not found", interface);
 636
 637         freeifaddrs(ifap);
 638 }
 639
 640 /*
 641  * Set a flag to indicate that a signal from the periodic itimer has been
 642  * caught.
 643  */
 644 static sig_atomic_t signalled;
 645 static void
 646 catchalarm(int signo __unused)
 647 {
 648         signalled = true;
 649 }
 650
 651 /*
 652  * Print a running summary of interface statistics.
 653  * Repeat display every interval seconds, showing statistics
 654  * collected over that interval.  Assumes that interval is non-zero.
 655  * First line printed at top of screen is always cumulative.
 656  */
 657 static void
 658 sidewaysintpr(void)
 659 {
 660         struct iftot ift[2], *new, *old;
 661         struct itimerval interval_it;
 662         int oldmask, line;
 663
 664         new = &ift[0];
 665         old = &ift[1];
 666         fill_iftot(old);
 667
 668         (void)signal(SIGALRM, catchalarm);
 669         signalled = false;
 670         interval_it.it_interval.tv_sec = interval;
 671         interval_it.it_interval.tv_usec = 0;
 672         interval_it.it_value = interval_it.it_interval;
 673         setitimer(ITIMER_REAL, &interval_it, NULL);
 674         xo_open_list("interface-statistics");
 675
 676 banner:
 677         xo_emit("{T:/%17s} {T:/%14s} {T:/%16s}\n", "input",
 678             interface != NULL ? interface : "(Total)", "output");
 679         xo_emit("{T:/%10s} {T:/%5s} {T:/%5s} {T:/%10s} {T:/%10s} {T:/%5s} "
 680             "{T:/%10s} {T:/%5s}",
 681             "packets", "errs", "idrops", "bytes", "packets", "errs", "bytes",
 682             "colls");
 683         if (dflag)
 684                 xo_emit(" {T:/%5.5s}", "drops");
 685         xo_emit("\n");
 686         xo_flush();
 687         line = 0;
 688
 689 loop:
 690         if ((noutputs != 0) && (--noutputs == 0)) {
 691                 xo_close_list("interface-statistics");
 692                 return;
 693         }
 694         oldmask = sigblock(sigmask(SIGALRM));
 695         while (!signalled)
 696                 sigpause(0);
 697         signalled = false;
 698         sigsetmask(oldmask);
 699         line++;
 700
 701         fill_iftot(new);
 702
 703         xo_open_instance("stats");
 704         show_stat("lu", 10, "received-packets",
 705             new->ift_ip - old->ift_ip, 1, 1);
 706         show_stat("lu", 5, "received-errors",
 707             new->ift_ie - old->ift_ie, 1, 1);
 708         show_stat("lu", 5, "dropped-packets",
 709             new->ift_id - old->ift_id, 1, 1);
 710         show_stat("lu", 10, "received-bytes",
 711             new->ift_ib - old->ift_ib, 1, 0);
 712         show_stat("lu", 10, "sent-packets",
 713             new->ift_op - old->ift_op, 1, 1);
 714         show_stat("lu", 5, "send-errors",
 715             new->ift_oe - old->ift_oe, 1, 1);
 716         show_stat("lu", 10, "sent-bytes",
 717             new->ift_ob - old->ift_ob, 1, 0);
 718         show_stat("NRSlu", 5, "collisions",
 719             new->ift_co - old->ift_co, 1, 1);
 720         if (dflag)
 721                 show_stat("LSlu", 5, "dropped-packets",
 722                     new->ift_od - old->ift_od, 1, 1);
 723         xo_close_instance("stats");
 724         xo_emit("\n");
 725         xo_flush();
 726
 727         if (new == &ift[0]) {
 728                 new = &ift[1];
 729                 old = &ift[0];
 730         } else {
 731                 new = &ift[0];
 732                 old = &ift[1];
 733         }
 734
 735         if (line == 21)
 736                 goto banner;
 737         else
 738                 goto loop;
 739
 740         /* NOTREACHED */
 741 }