usr.bin/netstat/if.c

   1 /*-
   2  * Copyright (c) 2013 Gleb Smirnoff <glebius@FreeBSD.org>
   3  * Copyright (c) 1983, 1988, 1993
   4  *      The Regents of the University of California.  All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 4. Neither the name of the University nor the names of its contributors
  15  *    may be used to endorse or promote products derived from this software
  16  *    without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  */
  30
  31 #if 0
  32 #ifndef lint
  33 static char sccsid[] = "@(#)if.c        8.3 (Berkeley) 4/28/95";
  34 #endif /* not lint */
  35 #endif
  36
  37 #include <sys/cdefs.h>
  38 __FBSDID("$FreeBSD$");
  39
  40 #include <sys/types.h>
  41 #include <sys/protosw.h>
  42 #include <sys/socket.h>
  43 #include <sys/socketvar.h>
  44 #include <sys/sysctl.h>
  45 #include <sys/time.h>
  46
  47 #include <net/if.h>
  48 #include <net/if_var.h>
  49 #include <net/if_dl.h>
  50 #include <net/if_types.h>
  51 #include <net/ethernet.h>
  52 #include <net/pfvar.h>
  53 #include <net/if_pfsync.h>
  54 #include <netinet/in.h>
  55 #include <netinet/in_var.h>
  56 #include <netipx/ipx.h>
  57 #include <netipx/ipx_if.h>
  58 #include <arpa/inet.h>
  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
  76 #include "netstat.h"
  77
  78 static void sidewaysintpr(int);
  79
  80 #ifdef INET6
  81 static char addr_buf[NI_MAXHOST];               /* for getnameinfo() */
  82 #endif
  83
  84 static const char* pfsyncacts[] = {
  85         /* PFSYNC_ACT_CLR */            "clear all request",
  86         /* PFSYNC_ACT_INS */            "state insert",
  87         /* PFSYNC_ACT_INS_ACK */        "state inserted ack",
  88         /* PFSYNC_ACT_UPD */            "state update",
  89         /* PFSYNC_ACT_UPD_C */          "compressed state update",
  90         /* PFSYNC_ACT_UPD_REQ */        "uncompressed state request",
  91         /* PFSYNC_ACT_DEL */            "state delete",
  92         /* PFSYNC_ACT_DEL_C */          "compressed state delete",
  93         /* PFSYNC_ACT_INS_F */          "fragment insert",
  94         /* PFSYNC_ACT_DEL_F */          "fragment delete",
  95         /* PFSYNC_ACT_BUS */            "bulk update mark",
  96         /* PFSYNC_ACT_TDB */            "TDB replay counter update",
  97         /* PFSYNC_ACT_EOF */            "end of frame mark",
  98 };
  99
 100 static void
 101 pfsync_acts_stats(const char *fmt, uint64_t *a)
 102 {
 103         int i;
 104
 105         for (i = 0; i < PFSYNC_ACT_MAX; i++, a++)
 106                 if (*a || sflag <= 1)
 107                         printf(fmt, *a, pfsyncacts[i], plural(*a));
 108 }
 109
 110 /*
 111  * Dump pfsync statistics structure.
 112  */
 113 void
 114 pfsync_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
 115 {
 116         struct pfsyncstats pfsyncstat, zerostat;
 117         size_t len = sizeof(struct pfsyncstats);
 118
 119         if (live) {
 120                 if (zflag)
 121                         memset(&zerostat, 0, len);
 122                 if (sysctlbyname("net.pfsync.stats", &pfsyncstat, &len,
 123                     zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
 124                         if (errno != ENOENT)
 125                                 warn("sysctl: net.pfsync.stats");
 126                         return;
 127                 }
 128         } else
 129                 kread(off, &pfsyncstat, len);
 130
 131         printf("%s:\n", name);
 132
 133 #define p(f, m) if (pfsyncstat.f || sflag <= 1) \
 134         printf(m, (uintmax_t)pfsyncstat.f, plural(pfsyncstat.f))
 135
 136         p(pfsyncs_ipackets, "\t%ju packet%s received (IPv4)\n");
 137         p(pfsyncs_ipackets6, "\t%ju packet%s received (IPv6)\n");
 138         pfsync_acts_stats("\t    %ju %s%s received\n",
 139             &pfsyncstat.pfsyncs_iacts[0]);
 140         p(pfsyncs_badif, "\t\t%ju packet%s discarded for bad interface\n");
 141         p(pfsyncs_badttl, "\t\t%ju packet%s discarded for bad ttl\n");
 142         p(pfsyncs_hdrops, "\t\t%ju packet%s shorter than header\n");
 143         p(pfsyncs_badver, "\t\t%ju packet%s discarded for bad version\n");
 144         p(pfsyncs_badauth, "\t\t%ju packet%s discarded for bad HMAC\n");
 145         p(pfsyncs_badact,"\t\t%ju packet%s discarded for bad action\n");
 146         p(pfsyncs_badlen, "\t\t%ju packet%s discarded for short packet\n");
 147         p(pfsyncs_badval, "\t\t%ju state%s discarded for bad values\n");
 148         p(pfsyncs_stale, "\t\t%ju stale state%s\n");
 149         p(pfsyncs_badstate, "\t\t%ju failed state lookup/insert%s\n");
 150         p(pfsyncs_opackets, "\t%ju packet%s sent (IPv4)\n");
 151         p(pfsyncs_opackets6, "\t%ju packet%s sent (IPv6)\n");
 152         pfsync_acts_stats("\t    %ju %s%s sent\n",
 153             &pfsyncstat.pfsyncs_oacts[0]);
 154         p(pfsyncs_onomem, "\t\t%ju failure%s due to mbuf memory error\n");
 155         p(pfsyncs_oerrors, "\t\t%ju send error%s\n");
 156 #undef p
 157 }
 158
 159 /*
 160  * Display a formatted value, or a '-' in the same space.
 161  */
 162 static void
 163 show_stat(const char *fmt, int width, u_long value, short showvalue)
 164 {
 165         const char *lsep, *rsep;
 166         char newfmt[32];
 167
 168         lsep = "";
 169         if (strncmp(fmt, "LS", 2) == 0) {
 170                 lsep = " ";
 171                 fmt += 2;
 172         }
 173         rsep = " ";
 174         if (strncmp(fmt, "NRS", 3) == 0) {
 175                 rsep = "";
 176                 fmt += 3;
 177         }
 178         if (showvalue == 0) {
 179                 /* Print just dash. */
 180                 sprintf(newfmt, "%s%%%ds%s", lsep, width, rsep);
 181                 printf(newfmt, "-");
 182                 return;
 183         }
 184
 185         if (hflag) {
 186                 char buf[5];
 187
 188                 /* Format in human readable form. */
 189                 humanize_number(buf, sizeof(buf), (int64_t)value, "",
 190                     HN_AUTOSCALE, HN_NOSPACE | HN_DECIMAL);
 191                 sprintf(newfmt, "%s%%%ds%s", lsep, width, rsep);
 192                 printf(newfmt, buf);
 193         } else {
 194                 /* Construct the format string. */
 195                 sprintf(newfmt, "%s%%%d%s%s", lsep, width, fmt, rsep);
 196                 printf(newfmt, value);
 197         }
 198 }
 199
 200 /*
 201  * Find next multiaddr for a given interface name.
 202  */
 203 static struct ifmaddrs *
 204 next_ifma(struct ifmaddrs *ifma, const char *name, const sa_family_t family)
 205 {
 206
 207         for(; ifma != NULL; ifma = ifma->ifma_next) {
 208                 struct sockaddr_dl *sdl;
 209
 210                 sdl = (struct sockaddr_dl *)ifma->ifma_name;
 211                 if (ifma->ifma_addr->sa_family == family &&
 212                     strcmp(sdl->sdl_data, name) == 0)
 213                         break;
 214         }
 215
 216         return (ifma);
 217 }
 218
 219 /*
 220  * Print a description of the network interfaces.
 221  */
 222 void
 223 intpr(int interval, void (*pfunc)(char *))
 224 {
 225         struct ifaddrs *ifap, *ifa;
 226         struct ifmaddrs *ifmap, *ifma;
 227
 228         if (interval)
 229                 return sidewaysintpr(interval);
 230
 231         if (getifaddrs(&ifap) != 0)
 232                 err(EX_OSERR, "getifaddrs");
 233         if (aflag && getifmaddrs(&ifmap) != 0)
 234                 err(EX_OSERR, "getifmaddrs");
 235
 236         if (!pfunc) {
 237                 if (Wflag)
 238                         printf("%-7.7s", "Name");
 239                 else
 240                         printf("%-5.5s", "Name");
 241                 printf(" %5.5s %-13.13s %-17.17s %8.8s %5.5s %5.5s",
 242                     "Mtu", "Network", "Address", "Ipkts", "Ierrs", "Idrop");
 243                 if (bflag)
 244                         printf(" %10.10s","Ibytes");
 245                 printf(" %8.8s %5.5s", "Opkts", "Oerrs");
 246                 if (bflag)
 247                         printf(" %10.10s","Obytes");
 248                 printf(" %5s", "Coll");
 249                 if (dflag)
 250                         printf(" %s", "Drop");
 251                 putchar('\n');
 252         }
 253
 254         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 255                 bool network = false, link = false;
 256
 257                 if (interface != NULL && strcmp(ifa->ifa_name, interface) != 0)
 258                         continue;
 259
 260                 if (pfunc) {
 261                         char *name;
 262
 263                         name = ifa->ifa_name;
 264                         (*pfunc)(name);
 265
 266                         /*
 267                          * Skip all ifaddrs belonging to same interface.
 268                          */
 269                         while(ifa->ifa_next != NULL &&
 270                             (strcmp(ifa->ifa_next->ifa_name, name) == 0)) {
 271                                 ifa = ifa->ifa_next;
 272                         }
 273                         continue;
 274                 }
 275
 276                 if (af != AF_UNSPEC && ifa->ifa_addr->sa_family != af)
 277                         continue;
 278
 279                 if (Wflag)
 280                         printf("%-7.7s", ifa->ifa_name);
 281                 else
 282                         printf("%-5.5s", ifa->ifa_name);
 283
 284 #define IFA_MTU(ifa)    (((struct if_data *)(ifa)->ifa_data)->ifi_mtu)
 285                 show_stat("lu", 6, IFA_MTU(ifa), IFA_MTU(ifa));
 286 #undef IFA_MTU
 287
 288                 switch (ifa->ifa_addr->sa_family) {
 289                 case AF_UNSPEC:
 290                         printf("%-13.13s ", "none");
 291                         printf("%-15.15s ", "none");
 292                         break;
 293                 case AF_INET:
 294                     {
 295                         struct sockaddr_in *sin, *mask;
 296
 297                         sin = (struct sockaddr_in *)ifa->ifa_addr;
 298                         mask = (struct sockaddr_in *)ifa->ifa_netmask;
 299                         printf("%-13.13s ", netname(sin->sin_addr.s_addr,
 300                             mask->sin_addr.s_addr));
 301                         printf("%-17.17s ",
 302                             routename(sin->sin_addr.s_addr));
 303
 304                         network = true;
 305                         break;
 306                     }
 307 #ifdef INET6
 308                 case AF_INET6:
 309                     {
 310                         struct sockaddr_in6 *sin6, *mask;
 311
 312                         sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
 313                         mask = (struct sockaddr_in6 *)ifa->ifa_netmask;
 314
 315                         printf("%-13.13s ", netname6(sin6, &mask->sin6_addr));
 316                         getnameinfo(ifa->ifa_addr, ifa->ifa_addr->sa_len,
 317                             addr_buf, sizeof(addr_buf), 0, 0, NI_NUMERICHOST);
 318                         printf("%-17.17s ", addr_buf);
 319
 320                         network = 1;
 321                         break;
 322                     }
 323 #endif /* INET6 */
 324                 case AF_IPX:
 325                     {
 326                         struct sockaddr_ipx *sipx;
 327                         u_long net;
 328                         char netnum[10];
 329
 330                         sipx = (struct sockaddr_ipx *)ifa->ifa_addr;
 331                         *(union ipx_net *) &net = sipx->sipx_addr.x_net;
 332
 333                         sprintf(netnum, "%lx", (u_long)ntohl(net));
 334                         printf("ipx:%-8s  ", netnum);
 335                         printf("%-17s ", ipx_phost((struct sockaddr *)sipx));
 336
 337                         network = 1;
 338                         break;
 339                     }
 340                 case AF_APPLETALK:
 341                         printf("atalk:%-12.12s ",
 342                             atalk_print(ifa->ifa_addr, 0x10));
 343                         printf("%-11.11s  ",
 344                             atalk_print(ifa->ifa_addr, 0x0b));
 345                         break;
 346                 case AF_LINK:
 347                     {
 348                         struct sockaddr_dl *sdl;
 349                         char *cp, linknum[10];
 350                         int n, m;
 351
 352                         sdl = (struct sockaddr_dl *)ifa->ifa_addr;
 353                         cp = (char *)LLADDR(sdl);
 354                         n = sdl->sdl_alen;
 355                         sprintf(linknum, "<Link#%d>", sdl->sdl_index);
 356                         m = printf("%-13.13s ", linknum);
 357
 358                         while ((--n >= 0) && (m < 30))
 359                                 m += printf("%02x%c", *cp++ & 0xff,
 360                                             n > 0 ? ':' : ' ');
 361                         m = 32 - m;
 362                         while (m-- > 0)
 363                                 putchar(' ');
 364
 365                         link = 1;
 366                         break;
 367                     }
 368                 }
 369
 370 #define IFA_STAT(s)     (((struct if_data *)ifa->ifa_data)->ifi_ ## s)
 371                 show_stat("lu", 8, IFA_STAT(ipackets), link|network);
 372                 show_stat("lu", 5, IFA_STAT(ierrors), link);
 373                 show_stat("lu", 5, IFA_STAT(iqdrops), link);
 374                 if (bflag)
 375                         show_stat("lu", 10, IFA_STAT(ibytes), link|network);
 376                 show_stat("lu", 8, IFA_STAT(opackets), link|network);
 377                 show_stat("lu", 5, IFA_STAT(oerrors), link);
 378                 if (bflag)
 379                         show_stat("lu", 10, IFA_STAT(obytes), link|network);
 380                 show_stat("NRSlu", 5, IFA_STAT(collisions), link);
 381                 /* XXXGL: output queue drops */
 382                 putchar('\n');
 383
 384                 if (!aflag)
 385                         continue;
 386
 387                 /*
 388                  * Print family's multicast addresses.
 389                  */
 390                 for (ifma = next_ifma(ifmap, ifa->ifa_name,
 391                      ifa->ifa_addr->sa_family);
 392                      ifma != NULL;
 393                      ifma = next_ifma(ifma, ifa->ifa_name,
 394                      ifa->ifa_addr->sa_family)) {
 395                         const char *fmt = NULL;
 396
 397                         switch (ifma->ifma_addr->sa_family) {
 398                         case AF_INET:
 399                             {
 400                                 struct sockaddr_in *sin;
 401
 402                                 sin = (struct sockaddr_in *)ifma->ifma_addr;
 403                                 fmt = routename(sin->sin_addr.s_addr);
 404                                 break;
 405                             }
 406 #ifdef INET6
 407                         case AF_INET6:
 408
 409                                 /* in6_fillscopeid(&msa.in6); */
 410                                 getnameinfo(ifma->ifma_addr,
 411                                     ifma->ifma_addr->sa_len, addr_buf,
 412                                     sizeof(addr_buf), 0, 0, NI_NUMERICHOST);
 413                                 printf("%*s %s\n",
 414                                     Wflag ? 27 : 25, "", addr_buf);
 415                                 break;
 416 #endif /* INET6 */
 417                         case AF_LINK:
 418                             {
 419                                 struct sockaddr_dl *sdl;
 420
 421                                 sdl = (struct sockaddr_dl *)ifma->ifma_addr;
 422                                 switch (sdl->sdl_type) {
 423                                 case IFT_ETHER:
 424                                 case IFT_FDDI:
 425                                         fmt = ether_ntoa(
 426                                             (struct ether_addr *)LLADDR(sdl));
 427                                         break;
 428                                 }
 429                                 break;
 430                             }
 431                         }
 432
 433                         if (fmt) {
 434                                 printf("%*s %-17.17s",
 435                                     Wflag ? 27 : 25, "", fmt);
 436                                 if (ifma->ifma_addr->sa_family == AF_LINK) {
 437                                         printf(" %8lu", IFA_STAT(imcasts));
 438                                         printf("%*s", bflag ? 17 : 6, "");
 439                                         printf(" %8lu", IFA_STAT(omcasts));
 440                                 }
 441                                 putchar('\n');
 442                         }
 443
 444                         ifma = ifma->ifma_next;
 445                 }
 446         }
 447
 448         freeifaddrs(ifap);
 449         if (aflag)
 450                 freeifmaddrs(ifmap);
 451 }
 452
 453 struct iftot {
 454         u_long  ift_ip;                 /* input packets */
 455         u_long  ift_ie;                 /* input errors */
 456         u_long  ift_id;                 /* input drops */
 457         u_long  ift_op;                 /* output packets */
 458         u_long  ift_oe;                 /* output errors */
 459         u_long  ift_co;                 /* collisions */
 460         u_long  ift_ib;                 /* input bytes */
 461         u_long  ift_ob;                 /* output bytes */
 462 };
 463
 464 /*
 465  * Obtain stats for interface(s).
 466  */
 467 static void
 468 fill_iftot(struct iftot *st)
 469 {
 470         struct ifaddrs *ifap, *ifa;
 471         bool found = false;
 472
 473         if (getifaddrs(&ifap) != 0)
 474                 err(EX_OSERR, "getifaddrs");
 475
 476         bzero(st, sizeof(*st));
 477
 478         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 479                 if (ifa->ifa_addr->sa_family != AF_LINK)
 480                         continue;
 481                 if (interface) {
 482                         if (strcmp(ifa->ifa_name, interface) == 0)
 483                                 found = true;
 484                         else
 485                                 continue;
 486                 }
 487
 488                 st->ift_ip += IFA_STAT(ipackets);
 489                 st->ift_ie += IFA_STAT(ierrors);
 490                 st->ift_id += IFA_STAT(iqdrops);
 491                 st->ift_ib += IFA_STAT(ibytes);
 492                 st->ift_op += IFA_STAT(opackets);
 493                 st->ift_oe += IFA_STAT(oerrors);
 494                 st->ift_ob += IFA_STAT(obytes);
 495                 st->ift_co += IFA_STAT(collisions);
 496         }
 497
 498         if (interface && found == false)
 499                 err(EX_DATAERR, "interface %s not found", interface);
 500
 501         freeifaddrs(ifap);
 502 }
 503
 504 /*
 505  * Set a flag to indicate that a signal from the periodic itimer has been
 506  * caught.
 507  */
 508 static sig_atomic_t signalled;
 509 static void
 510 catchalarm(int signo __unused)
 511 {
 512         signalled = true;
 513 }
 514
 515 /*
 516  * Print a running summary of interface statistics.
 517  * Repeat display every interval seconds, showing statistics
 518  * collected over that interval.  Assumes that interval is non-zero.
 519  * First line printed at top of screen is always cumulative.
 520  */
 521 static void
 522 sidewaysintpr(int interval)
 523 {
 524         struct iftot ift[2], *new, *old;
 525         struct itimerval interval_it;
 526         int oldmask, line;
 527
 528         new = &ift[0];
 529         old = &ift[1];
 530         fill_iftot(old);
 531
 532         (void)signal(SIGALRM, catchalarm);
 533         signalled = false;
 534         interval_it.it_interval.tv_sec = interval;
 535         interval_it.it_interval.tv_usec = 0;
 536         interval_it.it_value = interval_it.it_interval;
 537         setitimer(ITIMER_REAL, &interval_it, NULL);
 538
 539 banner:
 540         printf("%17s %14s %16s", "input",
 541             interface != NULL ? interface : "(Total)", "output");
 542         putchar('\n');
 543         printf("%10s %5s %5s %10s %10s %5s %10s %5s",
 544             "packets", "errs", "idrops", "bytes", "packets", "errs", "bytes",
 545             "colls");
 546         if (dflag)
 547                 printf(" %5.5s", "drops");
 548         putchar('\n');
 549         fflush(stdout);
 550         line = 0;
 551
 552 loop:
 553         if ((noutputs != 0) && (--noutputs == 0))
 554                 exit(0);
 555         oldmask = sigblock(sigmask(SIGALRM));
 556         while (!signalled)
 557                 sigpause(0);
 558         signalled = false;
 559         sigsetmask(oldmask);
 560         line++;
 561
 562         fill_iftot(new);
 563
 564         show_stat("lu", 10, new->ift_ip - old->ift_ip, 1);
 565         show_stat("lu", 5, new->ift_ie - old->ift_ie, 1);
 566         show_stat("lu", 5, new->ift_id - old->ift_id, 1);
 567         show_stat("lu", 10, new->ift_ib - old->ift_ib, 1);
 568         show_stat("lu", 10, new->ift_op - old->ift_op, 1);
 569         show_stat("lu", 5, new->ift_oe - old->ift_oe, 1);
 570         show_stat("lu", 10, new->ift_ob - old->ift_ob, 1);
 571         show_stat("NRSlu", 5, new->ift_co - old->ift_co, 1);
 572         /* XXXGL: output queue drops */
 573         putchar('\n');
 574         fflush(stdout);
 575
 576         if (new == &ift[0]) {
 577                 new = &ift[1];
 578                 old = &ift[0];
 579         } else {
 580                 new = &ift[0];
 581                 old = &ift[1];
 582         }
 583
 584         if (line == 21)
 585                 goto banner;
 586         else
 587                 goto loop;
 588
 589         /* NOTREACHED */
 590 }