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