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