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 */            "state insert",
  85         /* PFSYNC_ACT_INS_ACK */        "state inserted ack",
  86         /* PFSYNC_ACT_UPD */            "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 };
  97
  98 static const char* pfsyncacts_name[] = {
  99         /* PFSYNC_ACT_CLR */            "clear-all-request",
 100         /* PFSYNC_ACT_INS */            "state-insert",
 101         /* PFSYNC_ACT_INS_ACK */        "state-inserted-ack",
 102         /* PFSYNC_ACT_UPD */            "state-update",
 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 };
 113
 114 static void
 115 pfsync_acts_stats(const char *list, const char *desc, uint64_t *a)
 116 {
 117         int i;
 118
 119         xo_open_list(list);
 120         for (i = 0; i < PFSYNC_ACT_MAX; i++, a++) {
 121                 if (*a || sflag <= 1) {
 122                         xo_open_instance(list);
 123                         xo_emit("\t\t{e:name}{:count/%ju} {N:/%s%s %s}\n",
 124                             pfsyncacts_name[i], (uintmax_t)(*a),
 125                             pfsyncacts[i], plural(*a), desc);
 126                         xo_close_instance(list);
 127                 }
 128         }
 129         xo_close_list(list);
 130 }
 131
 132 /*
 133  * Dump pfsync statistics structure.
 134  */
 135 void
 136 pfsync_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
 137 {
 138         struct pfsyncstats pfsyncstat;
 139
 140         if (fetch_stats("net.pfsync.stats", off, &pfsyncstat,
 141             sizeof(pfsyncstat), kread) != 0)
 142                 return;
 143
 144         xo_emit("{T:/%s}:\n", name);
 145         xo_open_container(name);
 146
 147 #define p(f, m) if (pfsyncstat.f || sflag <= 1) \
 148         xo_emit(m, (uintmax_t)pfsyncstat.f, plural(pfsyncstat.f))
 149
 150         p(pfsyncs_ipackets, "\t{:received-inet-packets/%ju} "
 151             "{N:/packet%s received (IPv4)}\n");
 152         p(pfsyncs_ipackets6, "\t{:received-inet6-packets/%ju} "
 153             "{N:/packet%s received (IPv6)}\n");
 154         pfsync_acts_stats("input-histogram", "received",
 155             &pfsyncstat.pfsyncs_iacts[0]);
 156         p(pfsyncs_badif, "\t\t/{:dropped-bad-interface/%ju} "
 157             "{N:/packet%s discarded for bad interface}\n");
 158         p(pfsyncs_badttl, "\t\t{:dropped-bad-ttl/%ju} "
 159             "{N:/packet%s discarded for bad ttl}\n");
 160         p(pfsyncs_hdrops, "\t\t{:dropped-short-header/%ju} "
 161             "{N:/packet%s shorter than header}\n");
 162         p(pfsyncs_badver, "\t\t{:dropped-bad-version/%ju} "
 163             "{N:/packet%s discarded for bad version}\n");
 164         p(pfsyncs_badauth, "\t\t{:dropped-bad-auth/%ju} "
 165             "{N:/packet%s discarded for bad HMAC}\n");
 166         p(pfsyncs_badact,"\t\t{:dropped-bad-action/%ju} "
 167             "{N:/packet%s discarded for bad action}\n");
 168         p(pfsyncs_badlen, "\t\t{:dropped-short/%ju} "
 169             "{N:/packet%s discarded for short packet}\n");
 170         p(pfsyncs_badval, "\t\t{:dropped-bad-values/%ju} "
 171             "{N:/state%s discarded for bad values}\n");
 172         p(pfsyncs_stale, "\t\t{:dropped-stale-state/%ju} "
 173             "{N:/stale state%s}\n");
 174         p(pfsyncs_badstate, "\t\t{:dropped-failed-lookup/%ju} "
 175             "{N:/failed state lookup\\/insert%s}\n");
 176         p(pfsyncs_opackets, "\t{:sent-inet-packets/%ju} "
 177             "{N:/packet%s sent (IPv4})\n");
 178         p(pfsyncs_opackets6, "\t{:send-inet6-packets/%ju} "
 179             "{N:/packet%s sent (IPv6})\n");
 180         pfsync_acts_stats("output-histogram", "sent",
 181             &pfsyncstat.pfsyncs_oacts[0]);
 182         p(pfsyncs_onomem, "\t\t{:discarded-no-memory/%ju} "
 183             "{N:/failure%s due to mbuf memory error}\n");
 184         p(pfsyncs_oerrors, "\t\t{:send-errors/%ju} "
 185             "{N:/send error%s}\n");
 186 #undef p
 187         xo_close_container(name);
 188 }
 189 #endif /* PF */
 190
 191 /*
 192  * Display a formatted value, or a '-' in the same space.
 193  */
 194 static void
 195 show_stat(const char *fmt, int width, const char *name,
 196     u_long value, short showvalue, int div1000)
 197 {
 198         const char *lsep, *rsep;
 199         char newfmt[64];
 200
 201         lsep = "";
 202         if (strncmp(fmt, "LS", 2) == 0) {
 203                 lsep = " ";
 204                 fmt += 2;
 205         }
 206         rsep = " ";
 207         if (strncmp(fmt, "NRS", 3) == 0) {
 208                 rsep = "";
 209                 fmt += 3;
 210         }
 211         if (showvalue == 0) {
 212                 /* Print just dash. */
 213                 xo_emit("{P:/%s}{D:/%*s}{P:/%s}", lsep, width, "-", rsep);
 214                 return;
 215         }
 216
 217         /*
 218          * XXX: workaround {P:} modifier can't be empty and doesn't seem to
 219          * take args... so we need to conditionally include it in the format.
 220          */
 221 #define maybe_pad(pad)  do {                                                \
 222         if (strlen(pad)) {                                                  \
 223                 snprintf(newfmt, sizeof(newfmt), "{P:%s}", pad);            \
 224                 xo_emit(newfmt);                                            \
 225         }                                                                   \
 226 } while (0)
 227
 228         if (hflag) {
 229                 char buf[5];
 230
 231                 /* Format in human readable form. */
 232                 humanize_number(buf, sizeof(buf), (int64_t)value, "",
 233                     HN_AUTOSCALE, HN_NOSPACE | HN_DECIMAL | \
 234                     ((div1000) ? HN_DIVISOR_1000 : 0));
 235                 maybe_pad(lsep);
 236                 snprintf(newfmt, sizeof(newfmt), "{:%s/%%%ds}", name, width);
 237                 xo_emit(newfmt, buf);
 238                 maybe_pad(rsep);
 239         } else {
 240                 /* Construct the format string. */
 241                 maybe_pad(lsep);
 242                 snprintf(newfmt, sizeof(newfmt), "{:%s/%%%d%s}",
 243                     name, width, fmt);
 244                 xo_emit(newfmt, value);
 245                 maybe_pad(rsep);
 246         }
 247 }
 248
 249 /*
 250  * Find next multiaddr for a given interface name.
 251  */
 252 static struct ifmaddrs *
 253 next_ifma(struct ifmaddrs *ifma, const char *name, const sa_family_t family)
 254 {
 255
 256         for(; ifma != NULL; ifma = ifma->ifma_next) {
 257                 struct sockaddr_dl *sdl;
 258
 259                 sdl = (struct sockaddr_dl *)ifma->ifma_name;
 260                 if (ifma->ifma_addr->sa_family == family &&
 261                     strcmp(sdl->sdl_data, name) == 0)
 262                         break;
 263         }
 264
 265         return (ifma);
 266 }
 267
 268 /*
 269  * Print a description of the network interfaces.
 270  */
 271 void
 272 intpr(void (*pfunc)(char *), int af)
 273 {
 274         struct ifaddrs *ifap, *ifa;
 275         struct ifmaddrs *ifmap, *ifma;
 276         u_int ifn_len_max = 5, ifn_len;
 277         u_int has_ipv6 = 0, net_len = 13, addr_len = 17;
 278
 279         if (interval)
 280                 return sidewaysintpr();
 281
 282         if (getifaddrs(&ifap) != 0)
 283                 err(EX_OSERR, "getifaddrs");
 284         if (aflag && getifmaddrs(&ifmap) != 0)
 285                 err(EX_OSERR, "getifmaddrs");
 286
 287         if (Wflag) {
 288                 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 289                         if (interface != NULL &&
 290                             strcmp(ifa->ifa_name, interface) != 0)
 291                                 continue;
 292                         if (af != AF_UNSPEC && ifa->ifa_addr->sa_family != af)
 293                                 continue;
 294                         ifn_len = strlen(ifa->ifa_name);
 295                         if ((ifa->ifa_flags & IFF_UP) == 0)
 296                                 ++ifn_len;
 297                         ifn_len_max = MAX(ifn_len_max, ifn_len);
 298                         if (ifa->ifa_addr->sa_family == AF_INET6)
 299                                 has_ipv6 = 1;
 300                 }
 301                 if (has_ipv6) {
 302                         net_len = 24;
 303                         addr_len = 39;
 304                 } else
 305                         net_len = 18;
 306         }
 307
 308         xo_open_list("interface");
 309         if (!pfunc) {
 310                 xo_emit("{T:/%-*.*s}", ifn_len_max, ifn_len_max, "Name");
 311                 xo_emit(" {T:/%5.5s} {T:/%-*.*s} {T:/%-*.*s} {T:/%8.8s} "
 312                     "{T:/%5.5s} {T:/%5.5s}",
 313                     "Mtu", net_len, net_len, "Network", addr_len, addr_len,
 314                     "Address", "Ipkts", "Ierrs", "Idrop");
 315                 if (bflag)
 316                         xo_emit(" {T:/%10.10s}","Ibytes");
 317                 xo_emit(" {T:/%8.8s} {T:/%5.5s}", "Opkts", "Oerrs");
 318                 if (bflag)
 319                         xo_emit(" {T:/%10.10s}","Obytes");
 320                 xo_emit(" {T:/%5s}", "Coll");
 321                 if (dflag)
 322                         xo_emit(" {T:/%5.5s}", "Drop");
 323                 xo_emit("\n");
 324         }
 325
 326         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 327                 bool network = false, link = false;
 328                 char *name, *xname, buf[IFNAMSIZ+1];
 329                 const char *nn, *rn;
 330
 331                 if (interface != NULL && strcmp(ifa->ifa_name, interface) != 0)
 332                         continue;
 333
 334                 name = ifa->ifa_name;
 335
 336                 if (pfunc) {
 337
 338                         (*pfunc)(name);
 339
 340                         /*
 341                          * Skip all ifaddrs belonging to same interface.
 342                          */
 343                         while(ifa->ifa_next != NULL &&
 344                             (strcmp(ifa->ifa_next->ifa_name, name) == 0)) {
 345                                 ifa = ifa->ifa_next;
 346                         }
 347                         continue;
 348                 }
 349
 350                 if (af != AF_UNSPEC && ifa->ifa_addr->sa_family != af)
 351                         continue;
 352
 353                 xo_open_instance("interface");
 354
 355                 if ((ifa->ifa_flags & IFF_UP) == 0) {
 356                         xname = stpcpy(buf, name);
 357                         *xname++ = '*';
 358                         *xname = '\0';
 359                         xname = buf;
 360                 } else
 361                         xname = name;
 362
 363                 xo_emit("{d:/%-*.*s}{etk:name}{eq:flags/0x%x}",
 364                     ifn_len_max, ifn_len_max, xname, name, ifa->ifa_flags);
 365
 366 #define IFA_MTU(ifa)    (((struct if_data *)(ifa)->ifa_data)->ifi_mtu)
 367                 show_stat("lu", 6, "mtu", IFA_MTU(ifa), IFA_MTU(ifa), 0);
 368 #undef IFA_MTU
 369
 370                 switch (ifa->ifa_addr->sa_family) {
 371                 case AF_UNSPEC:
 372                         xo_emit("{:network/%-*.*s} ", net_len, net_len,
 373                             "none");
 374                         xo_emit("{:address/%-*.*s} ", addr_len, addr_len,
 375                             "none");
 376                         break;
 377                 case AF_INET:
 378 #ifdef INET6
 379                 case AF_INET6:
 380 #endif /* INET6 */
 381                         nn = netname(ifa->ifa_addr, ifa->ifa_netmask);
 382                         rn = routename(ifa->ifa_addr, numeric_addr);
 383                         if (Wflag) {
 384                                 xo_emit("{t:network/%-*s} ", net_len, nn);
 385                                 xo_emit("{t:address/%-*s} ", addr_len, rn);
 386                         } else {
 387                                 xo_emit("{d:network/%-*.*s}{et:network} ",
 388                                     net_len, net_len, nn, nn);
 389                                 xo_emit("{d:address/%-*.*s}{et:address} ",
 390                                     addr_len, addr_len, rn, rn);
 391                         }
 392
 393                         network = true;
 394                         break;
 395                 case AF_LINK:
 396                     {
 397                         struct sockaddr_dl *sdl;
 398                         char linknum[sizeof("<Link#32767>")];
 399
 400                         sdl = (struct sockaddr_dl *)ifa->ifa_addr;
 401                         snprintf(linknum, sizeof(linknum), "<Link#%d>", sdl->sdl_index);
 402                         xo_emit("{t:network/%-*.*s} ", net_len, net_len,
 403                             linknum);
 404                         if (sdl->sdl_nlen == 0 &&
 405                             sdl->sdl_alen == 0 &&
 406                             sdl->sdl_slen == 0)
 407                                 xo_emit("{P:/%*s} ", addr_len, "");
 408                         else
 409                                 xo_emit("{t:address/%-*.*s} ", addr_len,
 410                                     addr_len, routename(ifa->ifa_addr, 1));
 411                         link = true;
 412                         break;
 413                     }
 414                 }
 415
 416 #define IFA_STAT(s)     (((struct if_data *)ifa->ifa_data)->ifi_ ## s)
 417                 show_stat("lu", 8, "received-packets", IFA_STAT(ipackets),
 418                     link|network, 1);
 419                 show_stat("lu", 5, "received-errors", IFA_STAT(ierrors),
 420                     link, 1);
 421                 show_stat("lu", 5, "dropped-packets", IFA_STAT(iqdrops),
 422                     link, 1);
 423                 if (bflag)
 424                         show_stat("lu", 10, "received-bytes", IFA_STAT(ibytes),
 425                             link|network, 0);
 426                 show_stat("lu", 8, "sent-packets", IFA_STAT(opackets),
 427                     link|network, 1);
 428                 show_stat("lu", 5, "send-errors", IFA_STAT(oerrors), link, 1);
 429                 if (bflag)
 430                         show_stat("lu", 10, "sent-bytes", IFA_STAT(obytes),
 431                             link|network, 0);
 432                 show_stat("NRSlu", 5, "collisions", IFA_STAT(collisions),
 433                     link, 1);
 434                 if (dflag)
 435                         show_stat("LSlu", 5, "dropped-packets",
 436                             IFA_STAT(oqdrops), link, 1);
 437                 xo_emit("\n");
 438
 439                 if (!aflag) {
 440                         xo_close_instance("interface");
 441                         continue;
 442                 }
 443
 444                 /*
 445                  * Print family's multicast addresses.
 446                  */
 447                 xo_open_list("multicast-address");
 448                 for (ifma = next_ifma(ifmap, ifa->ifa_name,
 449                     ifa->ifa_addr->sa_family);
 450                     ifma != NULL;
 451                     ifma = next_ifma(ifma, ifa->ifa_name,
 452                     ifa->ifa_addr->sa_family)) {
 453                         const char *fmt = NULL;
 454
 455                         xo_open_instance("multicast-address");
 456                         switch (ifma->ifma_addr->sa_family) {
 457                         case AF_LINK:
 458                             {
 459                                 struct sockaddr_dl *sdl;
 460
 461                                 sdl = (struct sockaddr_dl *)ifma->ifma_addr;
 462                                 if (sdl->sdl_type != IFT_ETHER &&
 463                                     sdl->sdl_type != IFT_FDDI)
 464                                         break;
 465                             }
 466                                 /* FALLTHROUGH */
 467                         case AF_INET:
 468 #ifdef INET6
 469                         case AF_INET6:
 470 #endif /* INET6 */
 471                                 fmt = routename(ifma->ifma_addr, numeric_addr);
 472                                 break;
 473                         }
 474                         if (fmt) {
 475                                 if (Wflag)
 476                                         xo_emit("{P:/%27s }"
 477                                             "{t:address/%-17s/}", "", fmt);
 478                                 else
 479                                         xo_emit("{P:/%25s }"
 480                                             "{t:address/%-17.17s/}", "", fmt);
 481                                 if (ifma->ifma_addr->sa_family == AF_LINK) {
 482                                         xo_emit(" {:received-packets/%8lu}",
 483                                             IFA_STAT(imcasts));
 484                                         xo_emit("{P:/%*s}", bflag? 17 : 6, "");
 485                                         xo_emit(" {:sent-packets/%8lu}",
 486                                             IFA_STAT(omcasts));
 487                                 }
 488                                 xo_emit("\n");
 489                         }
 490                         xo_close_instance("multicast-address");
 491                         ifma = ifma->ifma_next;
 492                 }
 493                 xo_close_list("multicast-address");
 494                 xo_close_instance("interface");
 495         }
 496         xo_close_list("interface");
 497
 498         freeifaddrs(ifap);
 499         if (aflag)
 500                 freeifmaddrs(ifmap);
 501 }
 502
 503 struct iftot {
 504         u_long  ift_ip;                 /* input packets */
 505         u_long  ift_ie;                 /* input errors */
 506         u_long  ift_id;                 /* input drops */
 507         u_long  ift_op;                 /* output packets */
 508         u_long  ift_oe;                 /* output errors */
 509         u_long  ift_od;                 /* output drops */
 510         u_long  ift_co;                 /* collisions */
 511         u_long  ift_ib;                 /* input bytes */
 512         u_long  ift_ob;                 /* output bytes */
 513 };
 514
 515 /*
 516  * Obtain stats for interface(s).
 517  */
 518 static void
 519 fill_iftot(struct iftot *st)
 520 {
 521         struct ifaddrs *ifap, *ifa;
 522         bool found = false;
 523
 524         if (getifaddrs(&ifap) != 0)
 525                 xo_err(EX_OSERR, "getifaddrs");
 526
 527         bzero(st, sizeof(*st));
 528
 529         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 530                 if (ifa->ifa_addr->sa_family != AF_LINK)
 531                         continue;
 532                 if (interface) {
 533                         if (strcmp(ifa->ifa_name, interface) == 0)
 534                                 found = true;
 535                         else
 536                                 continue;
 537                 }
 538
 539                 st->ift_ip += IFA_STAT(ipackets);
 540                 st->ift_ie += IFA_STAT(ierrors);
 541                 st->ift_id += IFA_STAT(iqdrops);
 542                 st->ift_ib += IFA_STAT(ibytes);
 543                 st->ift_op += IFA_STAT(opackets);
 544                 st->ift_oe += IFA_STAT(oerrors);
 545                 st->ift_od += IFA_STAT(oqdrops);
 546                 st->ift_ob += IFA_STAT(obytes);
 547                 st->ift_co += IFA_STAT(collisions);
 548         }
 549
 550         if (interface && found == false)
 551                 xo_err(EX_DATAERR, "interface %s not found", interface);
 552
 553         freeifaddrs(ifap);
 554 }
 555
 556 /*
 557  * Set a flag to indicate that a signal from the periodic itimer has been
 558  * caught.
 559  */
 560 static sig_atomic_t signalled;
 561 static void
 562 catchalarm(int signo __unused)
 563 {
 564         signalled = true;
 565 }
 566
 567 /*
 568  * Print a running summary of interface statistics.
 569  * Repeat display every interval seconds, showing statistics
 570  * collected over that interval.  Assumes that interval is non-zero.
 571  * First line printed at top of screen is always cumulative.
 572  */
 573 static void
 574 sidewaysintpr(void)
 575 {
 576         struct iftot ift[2], *new, *old;
 577         struct itimerval interval_it;
 578         int oldmask, line;
 579
 580         new = &ift[0];
 581         old = &ift[1];
 582         fill_iftot(old);
 583
 584         (void)signal(SIGALRM, catchalarm);
 585         signalled = false;
 586         interval_it.it_interval.tv_sec = interval;
 587         interval_it.it_interval.tv_usec = 0;
 588         interval_it.it_value = interval_it.it_interval;
 589         setitimer(ITIMER_REAL, &interval_it, NULL);
 590         xo_open_list("interface-statistics");
 591
 592 banner:
 593         xo_emit("{T:/%17s} {T:/%14s} {T:/%16s}\n", "input",
 594             interface != NULL ? interface : "(Total)", "output");
 595         xo_emit("{T:/%10s} {T:/%5s} {T:/%5s} {T:/%10s} {T:/%10s} {T:/%5s} "
 596             "{T:/%10s} {T:/%5s}",
 597             "packets", "errs", "idrops", "bytes", "packets", "errs", "bytes",
 598             "colls");
 599         if (dflag)
 600                 xo_emit(" {T:/%5.5s}", "drops");
 601         xo_emit("\n");
 602         xo_flush();
 603         line = 0;
 604
 605 loop:
 606         if ((noutputs != 0) && (--noutputs == 0)) {
 607                 xo_close_list("interface-statistics");
 608                 return;
 609         }
 610         oldmask = sigblock(sigmask(SIGALRM));
 611         while (!signalled)
 612                 sigpause(0);
 613         signalled = false;
 614         sigsetmask(oldmask);
 615         line++;
 616
 617         fill_iftot(new);
 618
 619         xo_open_instance("stats");
 620         show_stat("lu", 10, "received-packets",
 621             new->ift_ip - old->ift_ip, 1, 1);
 622         show_stat("lu", 5, "received-errors",
 623             new->ift_ie - old->ift_ie, 1, 1);
 624         show_stat("lu", 5, "dropped-packets",
 625             new->ift_id - old->ift_id, 1, 1);
 626         show_stat("lu", 10, "received-bytes",
 627             new->ift_ib - old->ift_ib, 1, 0);
 628         show_stat("lu", 10, "sent-packets",
 629             new->ift_op - old->ift_op, 1, 1);
 630         show_stat("lu", 5, "send-errors",
 631             new->ift_oe - old->ift_oe, 1, 1);
 632         show_stat("lu", 10, "sent-bytes",
 633             new->ift_ob - old->ift_ob, 1, 0);
 634         show_stat("NRSlu", 5, "collisions",
 635             new->ift_co - old->ift_co, 1, 1);
 636         if (dflag)
 637                 show_stat("LSlu", 5, "dropped-packets",
 638                     new->ift_od - old->ift_od, 1, 1);
 639         xo_close_instance("stats");
 640         xo_emit("\n");
 641         xo_flush();
 642
 643         if (new == &ift[0]) {
 644                 new = &ift[1];
 645                 old = &ift[0];
 646         } else {
 647                 new = &ift[0];
 648                 old = &ift[1];
 649         }
 650
 651         if (line == 21)
 652                 goto banner;
 653         else
 654                 goto loop;
 655
 656         /* NOTREACHED */
 657 }