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 #define _IFI_OQDROPS
  48 #include <net/if.h>
  49 #include <net/if_var.h>
  50 #include <net/if_dl.h>
  51 #include <net/if_types.h>
  52 #include <net/ethernet.h>
  53 #include <netinet/in.h>
  54 #include <netinet/in_var.h>
  55 #include <netipx/ipx.h>
  56 #include <netipx/ipx_if.h>
  57 #include <arpa/inet.h>
  58 #ifdef PF
  59 #include <net/pfvar.h>
  60 #include <net/if_pfsync.h>
  61 #endif
  62
  63 #include <err.h>
  64 #include <errno.h>
  65 #include <ifaddrs.h>
  66 #include <libutil.h>
  67 #ifdef INET6
  68 #include <netdb.h>
  69 #endif
  70 #include <signal.h>
  71 #include <stdbool.h>
  72 #include <stdint.h>
  73 #include <stdio.h>
  74 #include <stdlib.h>
  75 #include <string.h>
  76 #include <sysexits.h>
  77 #include <unistd.h>
  78
  79 #include "netstat.h"
  80
  81 static void sidewaysintpr(int);
  82
  83 #ifdef INET6
  84 static char addr_buf[NI_MAXHOST];               /* for getnameinfo() */
  85 #endif
  86
  87 #ifdef PF
  88 static const char* pfsyncacts[] = {
  89         /* PFSYNC_ACT_CLR */            "clear all request",
  90         /* PFSYNC_ACT_INS */            "state insert",
  91         /* PFSYNC_ACT_INS_ACK */        "state inserted ack",
  92         /* PFSYNC_ACT_UPD */            "state update",
  93         /* PFSYNC_ACT_UPD_C */          "compressed state update",
  94         /* PFSYNC_ACT_UPD_REQ */        "uncompressed state request",
  95         /* PFSYNC_ACT_DEL */            "state delete",
  96         /* PFSYNC_ACT_DEL_C */          "compressed state delete",
  97         /* PFSYNC_ACT_INS_F */          "fragment insert",
  98         /* PFSYNC_ACT_DEL_F */          "fragment delete",
  99         /* PFSYNC_ACT_BUS */            "bulk update mark",
 100         /* PFSYNC_ACT_TDB */            "TDB replay counter update",
 101         /* PFSYNC_ACT_EOF */            "end of frame mark",
 102 };
 103
 104 static void
 105 pfsync_acts_stats(const char *fmt, uint64_t *a)
 106 {
 107         int i;
 108
 109         for (i = 0; i < PFSYNC_ACT_MAX; i++, a++)
 110                 if (*a || sflag <= 1)
 111                         printf(fmt, *a, pfsyncacts[i], plural(*a));
 112 }
 113
 114 /*
 115  * Dump pfsync statistics structure.
 116  */
 117 void
 118 pfsync_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
 119 {
 120         struct pfsyncstats pfsyncstat, zerostat;
 121         size_t len = sizeof(struct pfsyncstats);
 122
 123         if (live) {
 124                 if (zflag)
 125                         memset(&zerostat, 0, len);
 126                 if (sysctlbyname("net.pfsync.stats", &pfsyncstat, &len,
 127                     zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
 128                         if (errno != ENOENT)
 129                                 warn("sysctl: net.pfsync.stats");
 130                         return;
 131                 }
 132         } else
 133                 kread(off, &pfsyncstat, len);
 134
 135         printf("%s:\n", name);
 136
 137 #define p(f, m) if (pfsyncstat.f || sflag <= 1) \
 138         printf(m, (uintmax_t)pfsyncstat.f, plural(pfsyncstat.f))
 139
 140         p(pfsyncs_ipackets, "\t%ju packet%s received (IPv4)\n");
 141         p(pfsyncs_ipackets6, "\t%ju packet%s received (IPv6)\n");
 142         pfsync_acts_stats("\t    %ju %s%s received\n",
 143             &pfsyncstat.pfsyncs_iacts[0]);
 144         p(pfsyncs_badif, "\t\t%ju packet%s discarded for bad interface\n");
 145         p(pfsyncs_badttl, "\t\t%ju packet%s discarded for bad ttl\n");
 146         p(pfsyncs_hdrops, "\t\t%ju packet%s shorter than header\n");
 147         p(pfsyncs_badver, "\t\t%ju packet%s discarded for bad version\n");
 148         p(pfsyncs_badauth, "\t\t%ju packet%s discarded for bad HMAC\n");
 149         p(pfsyncs_badact,"\t\t%ju packet%s discarded for bad action\n");
 150         p(pfsyncs_badlen, "\t\t%ju packet%s discarded for short packet\n");
 151         p(pfsyncs_badval, "\t\t%ju state%s discarded for bad values\n");
 152         p(pfsyncs_stale, "\t\t%ju stale state%s\n");
 153         p(pfsyncs_badstate, "\t\t%ju failed state lookup/insert%s\n");
 154         p(pfsyncs_opackets, "\t%ju packet%s sent (IPv4)\n");
 155         p(pfsyncs_opackets6, "\t%ju packet%s sent (IPv6)\n");
 156         pfsync_acts_stats("\t    %ju %s%s sent\n",
 157             &pfsyncstat.pfsyncs_oacts[0]);
 158         p(pfsyncs_onomem, "\t\t%ju failure%s due to mbuf memory error\n");
 159         p(pfsyncs_oerrors, "\t\t%ju send error%s\n");
 160 #undef p
 161 }
 162 #endif /* PF */
 163
 164 /*
 165  * Display a formatted value, or a '-' in the same space.
 166  */
 167 static void
 168 show_stat(const char *fmt, int width, u_long value, short showvalue)
 169 {
 170         const char *lsep, *rsep;
 171         char newfmt[32];
 172
 173         lsep = "";
 174         if (strncmp(fmt, "LS", 2) == 0) {
 175                 lsep = " ";
 176                 fmt += 2;
 177         }
 178         rsep = " ";
 179         if (strncmp(fmt, "NRS", 3) == 0) {
 180                 rsep = "";
 181                 fmt += 3;
 182         }
 183         if (showvalue == 0) {
 184                 /* Print just dash. */
 185                 sprintf(newfmt, "%s%%%ds%s", lsep, width, rsep);
 186                 printf(newfmt, "-");
 187                 return;
 188         }
 189
 190         if (hflag) {
 191                 char buf[5];
 192
 193                 /* Format in human readable form. */
 194                 humanize_number(buf, sizeof(buf), (int64_t)value, "",
 195                     HN_AUTOSCALE, HN_NOSPACE | HN_DECIMAL);
 196                 sprintf(newfmt, "%s%%%ds%s", lsep, width, rsep);
 197                 printf(newfmt, buf);
 198         } else {
 199                 /* Construct the format string. */
 200                 sprintf(newfmt, "%s%%%d%s%s", lsep, width, fmt, rsep);
 201                 printf(newfmt, value);
 202         }
 203 }
 204
 205 /*
 206  * Find next multiaddr for a given interface name.
 207  */
 208 static struct ifmaddrs *
 209 next_ifma(struct ifmaddrs *ifma, const char *name, const sa_family_t family)
 210 {
 211
 212         for(; ifma != NULL; ifma = ifma->ifma_next) {
 213                 struct sockaddr_dl *sdl;
 214
 215                 sdl = (struct sockaddr_dl *)ifma->ifma_name;
 216                 if (ifma->ifma_addr->sa_family == family &&
 217                     strcmp(sdl->sdl_data, name) == 0)
 218                         break;
 219         }
 220
 221         return (ifma);
 222 }
 223
 224 /*
 225  * Print a description of the network interfaces.
 226  */
 227 void
 228 intpr(int interval, void (*pfunc)(char *), int af)
 229 {
 230         struct ifaddrs *ifap, *ifa;
 231         struct ifmaddrs *ifmap, *ifma;
 232
 233         if (interval)
 234                 return sidewaysintpr(interval);
 235
 236         if (getifaddrs(&ifap) != 0)
 237                 err(EX_OSERR, "getifaddrs");
 238         if (aflag && getifmaddrs(&ifmap) != 0)
 239                 err(EX_OSERR, "getifmaddrs");
 240
 241         if (!pfunc) {
 242                 if (Wflag)
 243                         printf("%-7.7s", "Name");
 244                 else
 245                         printf("%-5.5s", "Name");
 246                 printf(" %5.5s %-13.13s %-17.17s %8.8s %5.5s %5.5s",
 247                     "Mtu", "Network", "Address", "Ipkts", "Ierrs", "Idrop");
 248                 if (bflag)
 249                         printf(" %10.10s","Ibytes");
 250                 printf(" %8.8s %5.5s", "Opkts", "Oerrs");
 251                 if (bflag)
 252                         printf(" %10.10s","Obytes");
 253                 printf(" %5s", "Coll");
 254                 if (dflag)
 255                         printf("  %s", "Drop");
 256                 putchar('\n');
 257         }
 258
 259         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 260                 bool network = false, link = false;
 261
 262                 if (interface != NULL && strcmp(ifa->ifa_name, interface) != 0)
 263                         continue;
 264
 265                 if (pfunc) {
 266                         char *name;
 267
 268                         name = ifa->ifa_name;
 269                         (*pfunc)(name);
 270
 271                         /*
 272                          * Skip all ifaddrs belonging to same interface.
 273                          */
 274                         while(ifa->ifa_next != NULL &&
 275                             (strcmp(ifa->ifa_next->ifa_name, name) == 0)) {
 276                                 ifa = ifa->ifa_next;
 277                         }
 278                         continue;
 279                 }
 280
 281                 if (af != AF_UNSPEC && ifa->ifa_addr->sa_family != af)
 282                         continue;
 283
 284                 if (Wflag)
 285                         printf("%-7.7s", ifa->ifa_name);
 286                 else
 287                         printf("%-5.5s", ifa->ifa_name);
 288
 289 #define IFA_MTU(ifa)    (((struct if_data *)(ifa)->ifa_data)->ifi_mtu)
 290                 show_stat("lu", 6, IFA_MTU(ifa), IFA_MTU(ifa));
 291 #undef IFA_MTU
 292
 293                 switch (ifa->ifa_addr->sa_family) {
 294                 case AF_UNSPEC:
 295                         printf("%-13.13s ", "none");
 296                         printf("%-15.15s ", "none");
 297                         break;
 298                 case AF_INET:
 299                     {
 300                         struct sockaddr_in *sin, *mask;
 301
 302                         sin = (struct sockaddr_in *)ifa->ifa_addr;
 303                         mask = (struct sockaddr_in *)ifa->ifa_netmask;
 304                         printf("%-13.13s ", netname(sin->sin_addr.s_addr,
 305                             mask->sin_addr.s_addr));
 306                         printf("%-17.17s ",
 307                             routename(sin->sin_addr.s_addr));
 308
 309                         network = true;
 310                         break;
 311                     }
 312 #ifdef INET6
 313                 case AF_INET6:
 314                     {
 315                         struct sockaddr_in6 *sin6, *mask;
 316
 317                         sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
 318                         mask = (struct sockaddr_in6 *)ifa->ifa_netmask;
 319
 320                         printf("%-13.13s ", netname6(sin6, &mask->sin6_addr));
 321                         getnameinfo(ifa->ifa_addr, ifa->ifa_addr->sa_len,
 322                             addr_buf, sizeof(addr_buf), 0, 0, NI_NUMERICHOST);
 323                         printf("%-17.17s ", addr_buf);
 324
 325                         network = 1;
 326                         break;
 327                     }
 328 #endif /* INET6 */
 329                 case AF_IPX:
 330                     {
 331                         struct sockaddr_ipx *sipx;
 332                         u_long net;
 333                         char netnum[10];
 334
 335                         sipx = (struct sockaddr_ipx *)ifa->ifa_addr;
 336                         *(union ipx_net *) &net = sipx->sipx_addr.x_net;
 337
 338                         sprintf(netnum, "%lx", (u_long)ntohl(net));
 339                         printf("ipx:%-8s  ", netnum);
 340                         printf("%-17s ", ipx_phost((struct sockaddr *)sipx));
 341
 342                         network = 1;
 343                         break;
 344                     }
 345                 case AF_APPLETALK:
 346                         printf("atalk:%-12.12s ",
 347                             atalk_print(ifa->ifa_addr, 0x10));
 348                         printf("%-11.11s  ",
 349                             atalk_print(ifa->ifa_addr, 0x0b));
 350                         break;
 351                 case AF_LINK:
 352                     {
 353                         struct sockaddr_dl *sdl;
 354                         char *cp, linknum[10];
 355                         int n, m;
 356
 357                         sdl = (struct sockaddr_dl *)ifa->ifa_addr;
 358                         cp = (char *)LLADDR(sdl);
 359                         n = sdl->sdl_alen;
 360                         sprintf(linknum, "<Link#%d>", sdl->sdl_index);
 361                         m = printf("%-13.13s ", linknum);
 362
 363                         while ((--n >= 0) && (m < 30))
 364                                 m += printf("%02x%c", *cp++ & 0xff,
 365                                             n > 0 ? ':' : ' ');
 366                         m = 32 - m;
 367                         while (m-- > 0)
 368                                 putchar(' ');
 369
 370                         link = 1;
 371                         break;
 372                     }
 373                 }
 374
 375 #define IFA_STAT(s)     (((struct if_data *)ifa->ifa_data)->ifi_ ## s)
 376                 show_stat("lu", 8, IFA_STAT(ipackets), link|network);
 377                 show_stat("lu", 5, IFA_STAT(ierrors), link);
 378                 show_stat("lu", 5, IFA_STAT(iqdrops), link);
 379                 if (bflag)
 380                         show_stat("lu", 10, IFA_STAT(ibytes), link|network);
 381                 show_stat("lu", 8, IFA_STAT(opackets), link|network);
 382                 show_stat("lu", 5, IFA_STAT(oerrors), link);
 383                 if (bflag)
 384                         show_stat("lu", 10, IFA_STAT(obytes), link|network);
 385                 show_stat("NRSlu", 5, IFA_STAT(collisions), link);
 386                 if (dflag)
 387                         show_stat("LSlu", 5, IFA_STAT(oqdrops), link);
 388                 putchar('\n');
 389
 390                 if (!aflag)
 391                         continue;
 392
 393                 /*
 394                  * Print family's multicast addresses.
 395                  */
 396                 for (ifma = next_ifma(ifmap, ifa->ifa_name,
 397                      ifa->ifa_addr->sa_family);
 398                      ifma != NULL;
 399                      ifma = next_ifma(ifma, ifa->ifa_name,
 400                      ifa->ifa_addr->sa_family)) {
 401                         const char *fmt = NULL;
 402
 403                         switch (ifma->ifma_addr->sa_family) {
 404                         case AF_INET:
 405                             {
 406                                 struct sockaddr_in *sin;
 407
 408                                 sin = (struct sockaddr_in *)ifma->ifma_addr;
 409                                 fmt = routename(sin->sin_addr.s_addr);
 410                                 break;
 411                             }
 412 #ifdef INET6
 413                         case AF_INET6:
 414
 415                                 /* in6_fillscopeid(&msa.in6); */
 416                                 getnameinfo(ifma->ifma_addr,
 417                                     ifma->ifma_addr->sa_len, addr_buf,
 418                                     sizeof(addr_buf), 0, 0, NI_NUMERICHOST);
 419                                 printf("%*s %s\n",
 420                                     Wflag ? 27 : 25, "", addr_buf);
 421                                 break;
 422 #endif /* INET6 */
 423                         case AF_LINK:
 424                             {
 425                                 struct sockaddr_dl *sdl;
 426
 427                                 sdl = (struct sockaddr_dl *)ifma->ifma_addr;
 428                                 switch (sdl->sdl_type) {
 429                                 case IFT_ETHER:
 430                                 case IFT_FDDI:
 431                                         fmt = ether_ntoa(
 432                                             (struct ether_addr *)LLADDR(sdl));
 433                                         break;
 434                                 }
 435                                 break;
 436                             }
 437                         }
 438
 439                         if (fmt) {
 440                                 printf("%*s %-17.17s",
 441                                     Wflag ? 27 : 25, "", fmt);
 442                                 if (ifma->ifma_addr->sa_family == AF_LINK) {
 443                                         printf(" %8lu", IFA_STAT(imcasts));
 444                                         printf("%*s", bflag ? 17 : 6, "");
 445                                         printf(" %8lu", IFA_STAT(omcasts));
 446                                 }
 447                                 putchar('\n');
 448                         }
 449
 450                         ifma = ifma->ifma_next;
 451                 }
 452         }
 453
 454         freeifaddrs(ifap);
 455         if (aflag)
 456                 freeifmaddrs(ifmap);
 457 }
 458
 459 struct iftot {
 460         u_long  ift_ip;                 /* input packets */
 461         u_long  ift_ie;                 /* input errors */
 462         u_long  ift_id;                 /* input drops */
 463         u_long  ift_op;                 /* output packets */
 464         u_long  ift_oe;                 /* output errors */
 465         u_long  ift_od;                 /* output drops */
 466         u_long  ift_co;                 /* collisions */
 467         u_long  ift_ib;                 /* input bytes */
 468         u_long  ift_ob;                 /* output bytes */
 469 };
 470
 471 /*
 472  * Obtain stats for interface(s).
 473  */
 474 static void
 475 fill_iftot(struct iftot *st)
 476 {
 477         struct ifaddrs *ifap, *ifa;
 478         bool found = false;
 479
 480         if (getifaddrs(&ifap) != 0)
 481                 err(EX_OSERR, "getifaddrs");
 482
 483         bzero(st, sizeof(*st));
 484
 485         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 486                 if (ifa->ifa_addr->sa_family != AF_LINK)
 487                         continue;
 488                 if (interface) {
 489                         if (strcmp(ifa->ifa_name, interface) == 0)
 490                                 found = true;
 491                         else
 492                                 continue;
 493                 }
 494
 495                 st->ift_ip += IFA_STAT(ipackets);
 496                 st->ift_ie += IFA_STAT(ierrors);
 497                 st->ift_id += IFA_STAT(iqdrops);
 498                 st->ift_ib += IFA_STAT(ibytes);
 499                 st->ift_op += IFA_STAT(opackets);
 500                 st->ift_oe += IFA_STAT(oerrors);
 501                 st->ift_od += IFA_STAT(oqdrops);
 502                 st->ift_ob += IFA_STAT(obytes);
 503                 st->ift_co += IFA_STAT(collisions);
 504         }
 505
 506         if (interface && found == false)
 507                 err(EX_DATAERR, "interface %s not found", interface);
 508
 509         freeifaddrs(ifap);
 510 }
 511
 512 /*
 513  * Set a flag to indicate that a signal from the periodic itimer has been
 514  * caught.
 515  */
 516 static sig_atomic_t signalled;
 517 static void
 518 catchalarm(int signo __unused)
 519 {
 520         signalled = true;
 521 }
 522
 523 /*
 524  * Print a running summary of interface statistics.
 525  * Repeat display every interval seconds, showing statistics
 526  * collected over that interval.  Assumes that interval is non-zero.
 527  * First line printed at top of screen is always cumulative.
 528  */
 529 static void
 530 sidewaysintpr(int interval)
 531 {
 532         struct iftot ift[2], *new, *old;
 533         struct itimerval interval_it;
 534         int oldmask, line;
 535
 536         new = &ift[0];
 537         old = &ift[1];
 538         fill_iftot(old);
 539
 540         (void)signal(SIGALRM, catchalarm);
 541         signalled = false;
 542         interval_it.it_interval.tv_sec = interval;
 543         interval_it.it_interval.tv_usec = 0;
 544         interval_it.it_value = interval_it.it_interval;
 545         setitimer(ITIMER_REAL, &interval_it, NULL);
 546
 547 banner:
 548         printf("%17s %14s %16s", "input",
 549             interface != NULL ? interface : "(Total)", "output");
 550         putchar('\n');
 551         printf("%10s %5s %5s %10s %10s %5s %10s %5s",
 552             "packets", "errs", "idrops", "bytes", "packets", "errs", "bytes",
 553             "colls");
 554         if (dflag)
 555                 printf(" %5.5s", "drops");
 556         putchar('\n');
 557         fflush(stdout);
 558         line = 0;
 559
 560 loop:
 561         if ((noutputs != 0) && (--noutputs == 0))
 562                 exit(0);
 563         oldmask = sigblock(sigmask(SIGALRM));
 564         while (!signalled)
 565                 sigpause(0);
 566         signalled = false;
 567         sigsetmask(oldmask);
 568         line++;
 569
 570         fill_iftot(new);
 571
 572         show_stat("lu", 10, new->ift_ip - old->ift_ip, 1);
 573         show_stat("lu", 5, new->ift_ie - old->ift_ie, 1);
 574         show_stat("lu", 5, new->ift_id - old->ift_id, 1);
 575         show_stat("lu", 10, new->ift_ib - old->ift_ib, 1);
 576         show_stat("lu", 10, new->ift_op - old->ift_op, 1);
 577         show_stat("lu", 5, new->ift_oe - old->ift_oe, 1);
 578         show_stat("lu", 10, new->ift_ob - old->ift_ob, 1);
 579         show_stat("NRSlu", 5, new->ift_co - old->ift_co, 1);
 580         if (dflag)
 581                 show_stat("LSlu", 5, new->ift_od - old->ift_od, 1);
 582         putchar('\n');
 583         fflush(stdout);
 584
 585         if (new == &ift[0]) {
 586                 new = &ift[1];
 587                 old = &ift[0];
 588         } else {
 589                 new = &ift[0];
 590                 old = &ift[1];
 591         }
 592
 593         if (line == 21)
 594                 goto banner;
 595         else
 596                 goto loop;
 597
 598         /* NOTREACHED */
 599 }