usr.bin/netstat/if.c

   1 /*
   2  * Copyright (c) 1983, 1988, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifndef lint
  35 /*
  36 static char sccsid[] = "@(#)if.c        8.3 (Berkeley) 4/28/95";
  37 */
  38 static const char rcsid[] =
  39   "$FreeBSD$";
  40 #endif /* not lint */
  41
  42 #include <sys/types.h>
  43 #include <sys/protosw.h>
  44 #include <sys/socket.h>
  45 #include <sys/sysctl.h>
  46 #include <sys/time.h>
  47
  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/bridge.h>
  53 #include <net/ethernet.h>
  54 #include <netinet/in.h>
  55 #include <netinet/in_var.h>
  56 #include <netipx/ipx.h>
  57 #include <netipx/ipx_if.h>
  58 #ifdef NS
  59 #include <netns/ns.h>
  60 #include <netns/ns_if.h>
  61 #endif
  62 #ifdef ISO
  63 #include <netiso/iso.h>
  64 #include <netiso/iso_var.h>
  65 #endif
  66 #include <arpa/inet.h>
  67
  68 #include <signal.h>
  69 #include <stdio.h>
  70 #include <string.h>
  71 #include <unistd.h>
  72
  73 #include "netstat.h"
  74
  75 #define YES     1
  76 #define NO      0
  77
  78 static void sidewaysintpr __P((u_int, u_long));
  79 static void catchalarm __P((int));
  80
  81 #ifdef INET6
  82 char *netname6 __P((struct sockaddr_in6 *, struct in6_addr *));
  83 static char ntop_buf[INET6_ADDRSTRLEN];         /* for inet_ntop() */
  84 static int bdg_done;
  85 #endif
  86
  87 void
  88 bdg_stats(u_long dummy, char *name) /* print bridge statistics */
  89 {
  90     int i;
  91     size_t slen ;
  92     struct bdg_stats s ;
  93     int mib[4] ;
  94
  95     slen = sizeof(s);
  96
  97     mib[0] = CTL_NET ;
  98     mib[1] = PF_LINK ;
  99     mib[2] = IFT_ETHER ;
 100     mib[3] = PF_BDG ;
 101     if (sysctl(mib,4, &s,&slen,NULL,0)==-1)
 102         return ; /* no bridging */
 103 #ifdef INET6
 104     if (bdg_done != 0)
 105         return;
 106     else
 107         bdg_done = 1;
 108 #endif
 109     printf("-- Bridging statistics (%s) --\n", name) ;
 110     printf(
 111 "Name          In      Out  Forward     Drop    Bcast    Mcast    Local  Unknown\n");
 112     for (i = 0 ; i < 16 ; i++) {
 113         if (s.s[i].name[0])
 114         printf("%-6s %9ld%9ld%9ld%9ld%9ld%9ld%9ld%9ld\n",
 115           s.s[i].name,
 116           s.s[i].p_in[(int)BDG_IN],
 117           s.s[i].p_in[(int)BDG_OUT],
 118           s.s[i].p_in[(int)BDG_FORWARD],
 119           s.s[i].p_in[(int)BDG_DROP],
 120           s.s[i].p_in[(int)BDG_BCAST],
 121           s.s[i].p_in[(int)BDG_MCAST],
 122           s.s[i].p_in[(int)BDG_LOCAL],
 123           s.s[i].p_in[(int)BDG_UNKNOWN] );
 124     }
 125 }
 126
 127 /*
 128  * Print a description of the network interfaces.
 129  */
 130 void
 131 intpr(interval, ifnetaddr, pfunc)
 132         int interval;
 133         u_long ifnetaddr;
 134         void (*pfunc)(char *);
 135 {
 136         struct ifnet ifnet;
 137         struct ifnethead ifnethead;
 138         union {
 139                 struct ifaddr ifa;
 140                 struct in_ifaddr in;
 141 #ifdef INET6
 142                 struct in6_ifaddr in6;
 143 #endif
 144                 struct ipx_ifaddr ipx;
 145 #ifdef NS
 146                 struct ns_ifaddr ns;
 147 #endif
 148 #ifdef ISO
 149                 struct iso_ifaddr iso;
 150 #endif
 151         } ifaddr;
 152         u_long ifaddraddr;
 153         u_long ifaddrfound;
 154         u_long ifnetfound;
 155         struct sockaddr *sa = NULL;
 156         char name[32], tname[16];
 157
 158         if (ifnetaddr == 0) {
 159                 printf("ifnet: symbol not defined\n");
 160                 return;
 161         }
 162         if (interval) {
 163                 sidewaysintpr((unsigned)interval, ifnetaddr);
 164                 return;
 165         }
 166         if (kread(ifnetaddr, (char *)&ifnethead, sizeof ifnethead))
 167                 return;
 168         ifnetaddr = (u_long)ifnethead.tqh_first;
 169         if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet))
 170                 return;
 171
 172         if (!sflag && !pflag) {
 173                 printf("%-5.5s %-5.5s %-13.13s %-15.15s %8.8s %5.5s",
 174                        "Name", "Mtu", "Network", "Address", "Ipkts", "Ierrs");
 175                 if (bflag)
 176                         printf(" %10.10s","Ibytes");
 177                 printf(" %8.8s %5.5s", "Opkts", "Oerrs");
 178                 if (bflag)
 179                         printf(" %10.10s","Obytes");
 180                 printf(" %5s", "Coll");
 181                 if (tflag)
 182                         printf(" %s", "Time");
 183                 if (dflag)
 184                         printf(" %s", "Drop");
 185                 putchar('\n');
 186         }
 187         ifaddraddr = 0;
 188         while (ifnetaddr || ifaddraddr) {
 189                 struct sockaddr_in *sin;
 190 #ifdef INET6
 191                 struct sockaddr_in6 *sin6;
 192 #endif
 193                 register char *cp;
 194                 int n, m;
 195
 196                 if (ifaddraddr == 0) {
 197                         ifnetfound = ifnetaddr;
 198                         if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet) ||
 199                             kread((u_long)ifnet.if_name, tname, 16))
 200                                 return;
 201                         tname[15] = '\0';
 202                         ifnetaddr = (u_long)ifnet.if_link.tqe_next;
 203                         snprintf(name, 32, "%s%d", tname, ifnet.if_unit);
 204                         if (interface != 0 && (strcmp(name, interface) != 0))
 205                                 continue;
 206                         cp = index(name, '\0');
 207
 208                         if (pfunc) {
 209                                 (*pfunc)(name);
 210                                 continue;
 211                         }
 212
 213                         if ((ifnet.if_flags&IFF_UP) == 0)
 214                                 *cp++ = '*';
 215                         *cp = '\0';
 216                         ifaddraddr = (u_long)ifnet.if_addrhead.tqh_first;
 217                 }
 218                 printf("%-5.5s %-5lu ", name, ifnet.if_mtu);
 219                 ifaddrfound = ifaddraddr;
 220                 if (ifaddraddr == 0) {
 221                         printf("%-13.13s ", "none");
 222                         printf("%-15.15s ", "none");
 223                 } else {
 224                         if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)) {
 225                                 ifaddraddr = 0;
 226                                 continue;
 227                         }
 228 #define CP(x) ((char *)(x))
 229                         cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) +
 230                                 CP(&ifaddr);
 231                         sa = (struct sockaddr *)cp;
 232                         switch (sa->sa_family) {
 233                         case AF_UNSPEC:
 234                                 printf("%-13.13s ", "none");
 235                                 printf("%-15.15s ", "none");
 236                                 break;
 237                         case AF_INET:
 238                                 sin = (struct sockaddr_in *)sa;
 239 #ifdef notdef
 240                                 /* can't use inet_makeaddr because kernel
 241                                  * keeps nets unshifted.
 242                                  */
 243                                 in = inet_makeaddr(ifaddr.in.ia_subnet,
 244                                         INADDR_ANY);
 245                                 printf("%-13.13s ", netname(in.s_addr,
 246                                     ifaddr.in.ia_subnetmask));
 247 #else
 248                                 printf("%-13.13s ",
 249                                     netname(htonl(ifaddr.in.ia_subnet),
 250                                     ifaddr.in.ia_subnetmask));
 251 #endif
 252                                 printf("%-15.15s ",
 253                                     routename(sin->sin_addr.s_addr));
 254                                 break;
 255 #ifdef INET6
 256                         case AF_INET6:
 257                                 sin6 = (struct sockaddr_in6 *)sa;
 258                                 printf("%-11.11s ",
 259                                        netname6(&ifaddr.in6.ia_addr,
 260                                                 &ifaddr.in6.ia_prefixmask.sin6_addr));
 261                                 printf("%-17.17s ",
 262                                     (char *)inet_ntop(AF_INET6,
 263                                         &sin6->sin6_addr,
 264                                         ntop_buf, sizeof(ntop_buf)));
 265                                 break;
 266 #endif /*INET6*/
 267                         case AF_IPX:
 268                                 {
 269                                 struct sockaddr_ipx *sipx =
 270                                         (struct sockaddr_ipx *)sa;
 271                                 u_long net;
 272                                 char netnum[10];
 273
 274                                 *(union ipx_net *) &net = sipx->sipx_addr.x_net;
 275                                 sprintf(netnum, "%lx", (u_long)ntohl(net));
 276                                 printf("ipx:%-8s  ", netnum);
 277 /*                              printf("ipx:%-8s ", netname(net, 0L)); */
 278                                 printf("%-15s ",
 279                                     ipx_phost((struct sockaddr *)sipx));
 280                                 }
 281                                 break;
 282
 283                         case AF_APPLETALK:
 284                                 printf("atalk:%-12.12s ",atalk_print(sa,0x10) );
 285                                 printf("%-9.9s  ",atalk_print(sa,0x0b) );
 286                                 break;
 287 #ifdef NS
 288                         case AF_NS:
 289                                 {
 290                                 struct sockaddr_ns *sns =
 291                                         (struct sockaddr_ns *)sa;
 292                                 u_long net;
 293                                 char netnum[10];
 294
 295                                 *(union ns_net *) &net = sns->sns_addr.x_net;
 296                                 sprintf(netnum, "%lxH", ntohl(net));
 297                                 upHex(netnum);
 298                                 printf("ns:%-8s ", netnum);
 299                                 printf("%-15s ",
 300                                     ns_phost((struct sockaddr *)sns));
 301                                 }
 302                                 break;
 303 #endif
 304                         case AF_LINK:
 305                                 {
 306                                 struct sockaddr_dl *sdl =
 307                                         (struct sockaddr_dl *)sa;
 308                                 char linknum[10];
 309                                 cp = (char *)LLADDR(sdl);
 310                                 n = sdl->sdl_alen;
 311                                 sprintf(linknum, "<Link#%d>", sdl->sdl_index);
 312                                 m = printf("%-11.11s ", linknum);
 313                                 }
 314                                 goto hexprint;
 315                         default:
 316                                 m = printf("(%d)", sa->sa_family);
 317                                 for (cp = sa->sa_len + (char *)sa;
 318                                         --cp > sa->sa_data && (*cp == 0);) {}
 319                                 n = cp - sa->sa_data + 1;
 320                                 cp = sa->sa_data;
 321                         hexprint:
 322                                 while (--n >= 0)
 323                                         m += printf("%02x%c", *cp++ & 0xff,
 324                                                     n > 0 ? ':' : ' ');
 325                                 m = 30 - m;
 326                                 while (m-- > 0)
 327                                         putchar(' ');
 328                                 break;
 329                         }
 330                         ifaddraddr = (u_long)ifaddr.ifa.ifa_link.tqe_next;
 331                 }
 332                 printf("%8lu %5lu ",
 333                     ifnet.if_ipackets, ifnet.if_ierrors);
 334                 if (bflag)
 335                         printf("%10lu ", ifnet.if_ibytes);
 336                 printf("%8lu %5lu ",
 337                     ifnet.if_opackets, ifnet.if_oerrors);
 338                 if (bflag)
 339                         printf("%10lu ", ifnet.if_obytes);
 340                 printf("%5lu", ifnet.if_collisions);
 341                 if (tflag)
 342                         printf(" %3d", ifnet.if_timer);
 343                 if (dflag)
 344                         printf(" %3d", ifnet.if_snd.ifq_drops);
 345                 putchar('\n');
 346                 if (aflag && ifaddrfound) {
 347                         /*
 348                          * Print family's multicast addresses
 349                          */
 350                         u_long multiaddr;
 351                         struct ifmultiaddr ifma;
 352                         union {
 353                                 struct sockaddr sa;
 354                                 struct sockaddr_in in;
 355 #ifdef INET6
 356                                 struct sockaddr_in6 in6;
 357 #endif /* INET6 */
 358                                 struct sockaddr_dl dl;
 359                         } msa;
 360                         const char *fmt;
 361
 362                         for(multiaddr = (u_long)ifnet.if_multiaddrs.lh_first;
 363                             multiaddr;
 364                             multiaddr = (u_long)ifma.ifma_link.le_next) {
 365                                 if (kread(multiaddr, (char *)&ifma,
 366                                           sizeof ifma))
 367                                         break;
 368                                 if (kread((u_long)ifma.ifma_addr, (char *)&msa,
 369                                           sizeof msa))
 370                                         break;
 371                                 if (msa.sa.sa_family != sa->sa_family)
 372                                         continue;
 373
 374                                 fmt = 0;
 375                                 switch (msa.sa.sa_family) {
 376                                 case AF_INET:
 377                                         fmt = routename(msa.in.sin_addr.s_addr);
 378                                         break;
 379 #ifdef INET6
 380                                 case AF_INET6:
 381                                         printf("%23s %-19.19s(refs: %d)\n", "",
 382                                                inet_ntop(AF_INET6,
 383                                                          &msa.in6.sin6_addr,
 384                                                          ntop_buf,
 385                                                          sizeof(ntop_buf)),
 386                                                ifma.ifma_refcount);
 387 #endif /* INET6 */
 388                                 case AF_LINK:
 389                                         switch (ifnet.if_type) {
 390                                         case IFT_ETHER:
 391                                         case IFT_FDDI:
 392                                                 fmt = ether_ntoa(
 393                                                         (struct ether_addr *)
 394                                                         LLADDR(&msa.dl));
 395                                                 break;
 396                                         }
 397                                         break;
 398                                 }
 399                                 if (fmt)
 400                                         printf("%23s %s\n", "", fmt);
 401                         }
 402                 }
 403         }
 404 }
 405
 406 #define MAXIF   10
 407 struct  iftot {
 408         char    ift_name[16];           /* interface name */
 409         u_long  ift_ip;                 /* input packets */
 410         u_long  ift_ie;                 /* input errors */
 411         u_long  ift_op;                 /* output packets */
 412         u_long  ift_oe;                 /* output errors */
 413         u_long  ift_co;                 /* collisions */
 414         u_int   ift_dr;                 /* drops */
 415         u_long  ift_ib;                 /* input bytes */
 416         u_long  ift_ob;                 /* output bytes */
 417 } iftot[MAXIF];
 418
 419 u_char  signalled;                      /* set if alarm goes off "early" */
 420
 421 /*
 422  * Print a running summary of interface statistics.
 423  * Repeat display every interval seconds, showing statistics
 424  * collected over that interval.  Assumes that interval is non-zero.
 425  * First line printed at top of screen is always cumulative.
 426  * XXX - should be rewritten to use ifmib(4).
 427  */
 428 static void
 429 sidewaysintpr(interval, off)
 430         unsigned interval;
 431         u_long off;
 432 {
 433         struct ifnet ifnet;
 434         u_long firstifnet;
 435         struct ifnethead ifnethead;
 436         register struct iftot *ip, *total;
 437         register int line;
 438         struct iftot *lastif, *sum, *interesting;
 439         int oldmask, first;
 440         u_long interesting_off;
 441
 442         if (kread(off, (char *)&ifnethead, sizeof ifnethead))
 443                 return;
 444         firstifnet = (u_long)ifnethead.tqh_first;
 445
 446         lastif = iftot;
 447         sum = iftot + MAXIF - 1;
 448         total = sum - 1;
 449         interesting = NULL;
 450         interesting_off = 0;
 451         for (off = firstifnet, ip = iftot; off;) {
 452                 char name[16], tname[16];
 453
 454                 if (kread(off, (char *)&ifnet, sizeof ifnet))
 455                         break;
 456                 if (kread((u_long)ifnet.if_name, tname, 16))
 457                         break;
 458                 tname[15] = '\0';
 459                 snprintf(name, 16, "%s%d", tname, ifnet.if_unit);
 460                 if (interface && strcmp(name, interface) == 0) {
 461                         interesting = ip;
 462                         interesting_off = off;
 463                 }
 464                 snprintf(ip->ift_name, 16, "(%s)", name);;
 465                 ip++;
 466                 if (ip >= iftot + MAXIF - 2)
 467                         break;
 468                 off = (u_long) ifnet.if_link.tqe_next;
 469         }
 470         lastif = ip;
 471
 472         (void)signal(SIGALRM, catchalarm);
 473         signalled = NO;
 474         (void)alarm(interval);
 475         for (ip = iftot; ip < iftot + MAXIF; ip++) {
 476                 ip->ift_ip = 0;
 477                 ip->ift_ie = 0;
 478                 ip->ift_ib = 0;
 479                 ip->ift_op = 0;
 480                 ip->ift_oe = 0;
 481                 ip->ift_ob = 0;
 482                 ip->ift_co = 0;
 483                 ip->ift_dr = 0;
 484         }
 485         first = 1;
 486 banner:
 487         printf("%17s %14s %16s", "input",
 488             interesting ? interesting->ift_name : "(Total)", "output");
 489         putchar('\n');
 490         printf("%10s %5s %10s %10s %5s %10s %5s",
 491             "packets", "errs", "bytes", "packets", "errs", "bytes", "colls");
 492         if (dflag)
 493                 printf(" %5.5s", "drops");
 494         putchar('\n');
 495         fflush(stdout);
 496         line = 0;
 497 loop:
 498         if (interesting != NULL) {
 499                 ip = interesting;
 500                 if (kread(interesting_off, (char *)&ifnet, sizeof ifnet)) {
 501                         printf("???\n");
 502                         exit(1);
 503                 };
 504                 if (!first) {
 505                         printf("%10lu %5lu %10lu %10lu %5lu %10lu %5lu",
 506                                 ifnet.if_ipackets - ip->ift_ip,
 507                                 ifnet.if_ierrors - ip->ift_ie,
 508                                 ifnet.if_ibytes - ip->ift_ib,
 509                                 ifnet.if_opackets - ip->ift_op,
 510                                 ifnet.if_oerrors - ip->ift_oe,
 511                                 ifnet.if_obytes - ip->ift_ob,
 512                                 ifnet.if_collisions - ip->ift_co);
 513                         if (dflag)
 514                                 printf(" %5u", ifnet.if_snd.ifq_drops - ip->ift_dr);
 515                 }
 516                 ip->ift_ip = ifnet.if_ipackets;
 517                 ip->ift_ie = ifnet.if_ierrors;
 518                 ip->ift_ib = ifnet.if_ibytes;
 519                 ip->ift_op = ifnet.if_opackets;
 520                 ip->ift_oe = ifnet.if_oerrors;
 521                 ip->ift_ob = ifnet.if_obytes;
 522                 ip->ift_co = ifnet.if_collisions;
 523                 ip->ift_dr = ifnet.if_snd.ifq_drops;
 524         } else {
 525                 sum->ift_ip = 0;
 526                 sum->ift_ie = 0;
 527                 sum->ift_ib = 0;
 528                 sum->ift_op = 0;
 529                 sum->ift_oe = 0;
 530                 sum->ift_ob = 0;
 531                 sum->ift_co = 0;
 532                 sum->ift_dr = 0;
 533                 for (off = firstifnet, ip = iftot; off && ip < lastif; ip++) {
 534                         if (kread(off, (char *)&ifnet, sizeof ifnet)) {
 535                                 off = 0;
 536                                 continue;
 537                         }
 538                         sum->ift_ip += ifnet.if_ipackets;
 539                         sum->ift_ie += ifnet.if_ierrors;
 540                         sum->ift_ib += ifnet.if_ibytes;
 541                         sum->ift_op += ifnet.if_opackets;
 542                         sum->ift_oe += ifnet.if_oerrors;
 543                         sum->ift_ob += ifnet.if_obytes;
 544                         sum->ift_co += ifnet.if_collisions;
 545                         sum->ift_dr += ifnet.if_snd.ifq_drops;
 546                         off = (u_long) ifnet.if_link.tqe_next;
 547                 }
 548                 if (!first) {
 549                         printf("%10lu %5lu %10lu %10lu %5lu %10lu %5lu",
 550                                 sum->ift_ip - total->ift_ip,
 551                                 sum->ift_ie - total->ift_ie,
 552                                 sum->ift_ib - total->ift_ib,
 553                                 sum->ift_op - total->ift_op,
 554                                 sum->ift_oe - total->ift_oe,
 555                                 sum->ift_ob - total->ift_ob,
 556                                 sum->ift_co - total->ift_co);
 557                         if (dflag)
 558                                 printf(" %5u", sum->ift_dr - total->ift_dr);
 559                 }
 560                 *total = *sum;
 561         }
 562         if (!first)
 563                 putchar('\n');
 564         fflush(stdout);
 565         oldmask = sigblock(sigmask(SIGALRM));
 566         if (! signalled) {
 567                 sigpause(0);
 568         }
 569         sigsetmask(oldmask);
 570         signalled = NO;
 571         (void)alarm(interval);
 572         line++;
 573         first = 0;
 574         if (line == 21)
 575                 goto banner;
 576         else
 577                 goto loop;
 578         /*NOTREACHED*/
 579 }
 580
 581 /*
 582  * Called if an interval expires before sidewaysintpr has completed a loop.
 583  * Sets a flag to not wait for the alarm.
 584  */
 585 static void
 586 catchalarm(signo)
 587         int signo;
 588 {
 589         signalled = YES;
 590 }