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