usr.bin/netstat/main.c

   1 /*
   2  * Copyright (c) 1983, 1988, 1993
   3  *      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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#) Copyright (c) 1983, 1988, 1993 Regents of the University of California.  All rights reserved.
  30  * @(#)main.c   8.4 (Berkeley) 3/1/94
  31  * $FreeBSD: src/usr.bin/netstat/main.c,v 1.34.2.12 2001/09/17 15:17:46 ru Exp $
  32  */
  33
  34 #include <sys/param.h>
  35 #include <sys/file.h>
  36 #include <sys/protosw.h>
  37 #include <sys/socket.h>
  38 #include <sys/sysctl.h>
  39
  40 #include <netinet/in.h>
  41
  42 #include <netgraph/socket/ng_socket.h>
  43
  44 #include <ctype.h>
  45 #include <err.h>
  46 #include <errno.h>
  47 #include <kvm.h>
  48 #include <limits.h>
  49 #include <netdb.h>
  50 #include <nlist.h>
  51 #include <paths.h>
  52 #include <stdio.h>
  53 #include <stdlib.h>
  54 #include <string.h>
  55 #include <unistd.h>
  56 #include "netstat.h"
  57
  58 static struct nlist nl[] = {
  59 #define N_IFNET         0
  60         { .n_name = "_ifnet" },
  61 #define N_IMP           1
  62         { .n_name = "_imp_softc" },
  63 #define N_RTSTAT        2
  64         { .n_name = "_rtstat" },
  65 #define N_UNIXSW        3
  66         { .n_name = "_localsw" },
  67 #define N_IDP           4
  68         { .n_name = "_nspcb"},
  69 #define N_IDPSTAT       5
  70         { .n_name = "_idpstat"},
  71 #define N_SPPSTAT       6
  72         { .n_name = "_spp_istat"},
  73 #define N_NSERR         7
  74         { .n_name = "_ns_errstat"},
  75 #define N_CLNPSTAT      8
  76         { .n_name = "_clnp_stat"},
  77 #define IN_NOTUSED      9
  78         { .n_name = "_tp_inpcb" },
  79 #define ISO_TP          10
  80         { .n_name = "_tp_refinfo" },
  81 #define N_TPSTAT        11
  82         { .n_name = "_tp_stat" },
  83 #define N_ESISSTAT      12
  84         { .n_name = "_esis_stat"},
  85 #define N_NIMP          13
  86         { .n_name = "_nimp"},
  87 #define N_RTREE         14
  88         { .n_name = "_rt_tables"},
  89 #define N_CLTP          15
  90         { .n_name = "_cltb"},
  91 #define N_CLTPSTAT      16
  92         { .n_name = "_cltpstat"},
  93 #define N_NFILE         17
  94         { .n_name = "_nfile" },
  95 #define N_FILE          18
  96         { .n_name = "_file" },
  97 #define N_MRTSTAT       19
  98         { .n_name = "_mrtstat" },
  99 #define N_MFCTABLE      20
 100         { .n_name = "_mfctable" },
 101 #define N_VIFTABLE      21
 102         { .n_name = "_viftable" },
 103 #define N_NGSOCKS       22
 104         { .n_name = "_ngsocklist"},
 105 #define N_IP6STAT       23
 106         { .n_name = "_ip6stat" },
 107 #define N_ICMP6STAT     24
 108         { .n_name = "_icmp6stat" },
 109 #define N_PIM6STAT      25
 110         { .n_name = "_pim6stat" },
 111 #define N_MRT6PROTO     26
 112         { .n_name = "_ip6_mrtproto" },
 113 #define N_MRT6STAT      27
 114         { .n_name = "_mrt6stat" },
 115 #define N_MF6CTABLE     28
 116         { .n_name = "_mf6ctable" },
 117 #define N_MIF6TABLE     29
 118         { .n_name = "_mif6table" },
 119 #define N_MBSTAT        30
 120         { .n_name = "_mbstat" },
 121 #define N_MBTYPES       31
 122         { .n_name = "_mbtypes" },
 123 #define N_NMBCLUSTERS   32
 124         { .n_name = "_nmbclusters" },
 125 #define N_NMBUFS        33
 126         { .n_name = "_nmbufs" },
 127 #define N_RTTRASH       34
 128         { .n_name = "_rttrash" },
 129 #define N_NCPUS         35
 130         { .n_name = "_ncpus" },
 131 #define N_CARPSTAT      36
 132         { .n_name = "_carpstats" },
 133 #define N_NMBJCLUSTERS  37
 134         { .n_name = "_nmbjclusters" },
 135         { .n_name = NULL },
 136 };
 137
 138 struct protox {
 139         u_char  pr_index;               /* index into nlist of cb head */
 140         u_char  pr_sindex;              /* index into nlist of stat block */
 141         u_char  pr_wanted;              /* 1 if wanted, 0 otherwise */
 142         void    (*pr_cblocks)(u_long, const char *, int);
 143                                         /* control blocks printing routine */
 144         void    (*pr_stats)(u_long, const char *, int);
 145                                         /* statistics printing routine */
 146         void    (*pr_istats)(char *);   /* per/if statistics printing routine */
 147         const char *pr_name;            /* well-known name */
 148         u_int   pr_usesysctl;           /* true if we use sysctl, not kvm */
 149 } protox[] = {
 150         { -1,           -1,             1,      protopr,
 151           tcp_stats,    NULL,           "tcp",  IPPROTO_TCP },
 152         { -1,           -1,             1,      protopr,
 153           udp_stats,    NULL,           "udp",  IPPROTO_UDP },
 154         { -1,           -1,             1,      protopr,
 155           NULL,         NULL,           "divert",IPPROTO_DIVERT },
 156         { -1,           -1,             1,      protopr,
 157           ip_stats,     NULL,           "ip",   IPPROTO_RAW },
 158         { -1,           -1,             1,      protopr,
 159           icmp_stats,   NULL,           "icmp", IPPROTO_ICMP },
 160         { -1,           -1,             1,      protopr,
 161           igmp_stats,   NULL,           "igmp", IPPROTO_IGMP },
 162         { -1,           N_CARPSTAT,     1,      0,
 163           carp_stats,   NULL,           "carp",         0},
 164         { -1,           -1,             0,      0,
 165           0,            NULL,           NULL,           0}
 166 };
 167
 168 #ifdef INET6
 169 struct protox ip6protox[] = {
 170         { -1,           -1,             1,      protopr,
 171           tcp_stats,    NULL,           "tcp",  IPPROTO_TCP },
 172         { -1,           -1,             1,      protopr,
 173           udp_stats,    NULL,           "udp",  IPPROTO_UDP },
 174         { -1,           N_IP6STAT,      1,      protopr,
 175           ip6_stats,    ip6_ifstats,    "ip6",  IPPROTO_RAW },
 176         { -1,           N_ICMP6STAT,    1,      protopr,
 177           icmp6_stats,  icmp6_ifstats,  "icmp6",IPPROTO_ICMPV6 },
 178 #ifdef notyet
 179         { -1,           N_PIM6STAT,     1,      0,
 180           pim6_stats,   NULL,           "pim6", 0 },
 181 #endif
 182         { -1,           -1,             1,      0,
 183           rip6_stats,   NULL,           "rip6", 0 },
 184         { -1,           -1,             1,      protopr,
 185           pim_stats,    NULL,           "pim",  IPPROTO_PIM },
 186         { -1,           -1,             0,      0,
 187           0,            NULL,           0,      0 }
 188 };
 189 #endif /*INET6*/
 190
 191 struct protox netgraphprotox[] = {
 192         { N_NGSOCKS,    -1,             1,      netgraphprotopr,
 193           NULL,         NULL,           "ctrl", 0 },
 194         { N_NGSOCKS,    -1,             1,      netgraphprotopr,
 195           NULL,         NULL,           "data", 0 },
 196         { -1,           -1,             0,      0,
 197           0,            NULL,           NULL,   0 }
 198 };
 199
 200 struct protox *protoprotox[] = {
 201                                          protox,
 202 #ifdef INET6
 203                                          ip6protox,
 204 #endif
 205                                          NULL };
 206
 207 static void printproto (struct protox *, const char *, u_long);
 208 static void usage (void);
 209 static struct protox *name2protox (char *);
 210 static struct protox *knownname (char *);
 211
 212 static kvm_t *kvmd;
 213 static char *nlistf = NULL, *memf = NULL;
 214
 215 int     Aflag;          /* show addresses of protocol control block */
 216 int     aflag;          /* show all sockets (including servers) */
 217 int     bflag;          /* show i/f total bytes in/out */
 218 int     cpuflag = -1;   /* dump route table from specific cpu */
 219 int     dflag;          /* show i/f dropped packets */
 220 int     gflag;          /* show group (multicast) routing or stats */
 221 int     hflag;          /* show counters in human readable format */
 222 int     iflag;          /* show interfaces */
 223 int     Lflag;          /* show size of listen queues */
 224 int     mflag;          /* show memory stats */
 225 int     Pflag;          /* show more protocol info (go past 80 columns) */
 226 int     numeric_addr;   /* show addresses numerically */
 227 int     numeric_port;   /* show ports numerically */
 228 static int pflag;       /* show given protocol */
 229 int     rflag;          /* show routing tables (or routing stats) */
 230 int     sflag;          /* show protocol statistics */
 231 int     tflag;          /* show i/f watchdog timers */
 232 int     Bflag;          /* show buffer limit instead of buffer use */
 233 int     Wflag;          /* wide display */
 234 int     zflag;          /* zero stats */
 235
 236 int     interval;       /* repeat interval for i/f stats */
 237
 238 char    *interface;     /* desired i/f for stats, or NULL for all i/fs */
 239 int     unit;           /* unit number for above */
 240
 241 int     af;             /* address family */
 242
 243 int
 244 main(int argc, char **argv)
 245 {
 246         struct protox *tp = NULL;  /* for printing cblocks & stats */
 247         int ch;
 248         int n;
 249         size_t nsz;
 250
 251         af = AF_UNSPEC;
 252
 253         while ((ch = getopt(argc, argv, "Aabc:df:ghI:iLlM:mN:nPp:rSsBtuWw:z")) != -1)
 254                 switch(ch) {
 255                 case 'A':
 256                         Aflag = 1;
 257                         break;
 258                 case 'a':
 259                         aflag = 1;
 260                         break;
 261                 case 'b':
 262                         bflag = 1;
 263                         break;
 264                 case 'c':
 265                         nsz = sizeof(n);
 266                         sysctlbyname("net.netisr.ncpus", &n, &nsz, NULL, 0);
 267                         cpuflag = strtol(optarg, NULL, 0);
 268                         if (cpuflag < 0 || cpuflag >= n) {
 269                                 errx(1, "cpu%d does not have network data",
 270                                     cpuflag);
 271                         }
 272                         break;
 273                 case 'd':
 274                         dflag = 1;
 275                         break;
 276                 case 'f':
 277                         if (strcmp(optarg, "inet") == 0)
 278                                 af = AF_INET;
 279 #ifdef INET6
 280                         else if (strcmp(optarg, "inet6") == 0)
 281                                 af = AF_INET6;
 282 #endif /*INET6*/
 283                         else if (strcmp(optarg, "unix") == 0)
 284                                 af = AF_UNIX;
 285                         else if (strcmp(optarg, "ng") == 0
 286                             || strcmp(optarg, "netgraph") == 0)
 287                                 af = AF_NETGRAPH;
 288                         else if (strcmp(optarg, "link") == 0)
 289                                 af = AF_LINK;
 290                         else if (strcmp(optarg, "mpls") == 0)
 291                                 af = AF_MPLS;
 292                         else {
 293                                 errx(1, "%s: unknown address family", optarg);
 294                         }
 295                         break;
 296                 case 'g':
 297                         gflag = 1;
 298                         break;
 299                 case 'h':
 300                         hflag = 1;
 301                         break;
 302                 case 'I': {
 303                         char *cp;
 304
 305                         iflag = 1;
 306                         for (cp = interface = optarg; isalpha(*cp); cp++)
 307                                 continue;
 308                         unit = atoi(cp);
 309                         break;
 310                 }
 311                 case 'i':
 312                         iflag = 1;
 313                         break;
 314                 case 'L':
 315                         Lflag = 1;
 316                         break;
 317                 case 'M':
 318                         memf = optarg;
 319                         break;
 320                 case 'm':
 321                         mflag = 1;
 322                         break;
 323                 case 'N':
 324                         nlistf = optarg;
 325                         break;
 326                 case 'n':
 327                         numeric_addr = numeric_port = 1;
 328                         break;
 329                 case 'P':
 330                         Pflag = 1;
 331                         break;
 332                 case 'p':
 333                         if ((tp = name2protox(optarg)) == NULL) {
 334                                 errx(1,
 335                                      "%s: unknown or uninstrumented protocol",
 336                                      optarg);
 337                         }
 338                         pflag = 1;
 339                         break;
 340                 case 'r':
 341                         rflag = 1;
 342                         break;
 343                 case 's':
 344                         ++sflag;
 345                         break;
 346                 case 'S':
 347                         numeric_addr = 1;
 348                         break;
 349                 case 'B':
 350                         Bflag = 1;
 351                         break;
 352                 case 't':
 353                         tflag = 1;
 354                         break;
 355                 case 'u':
 356                         af = AF_UNIX;
 357                         break;
 358                 case 'W':
 359                 case 'l':
 360                         Wflag = 1;
 361                         break;
 362                 case 'w':
 363                         interval = atoi(optarg);
 364                         iflag = 1;
 365                         break;
 366                 case 'z':
 367                         zflag = 1;
 368                         break;
 369                 case '?':
 370                 default:
 371                         usage();
 372                 }
 373         argv += optind;
 374         argc -= optind;
 375
 376 #define BACKWARD_COMPATIBILITY
 377 #ifdef  BACKWARD_COMPATIBILITY
 378         if (*argv) {
 379                 if (isdigit(**argv)) {
 380                         interval = atoi(*argv);
 381                         if (interval <= 0)
 382                                 usage();
 383                         ++argv;
 384                         iflag = 1;
 385                 }
 386                 if (*argv) {
 387                         nlistf = *argv;
 388                         if (*++argv)
 389                                 memf = *argv;
 390                 }
 391         }
 392 #endif
 393
 394         /*
 395          * Discard setgid privileges if not the running kernel so that bad
 396          * guys can't print interesting stuff from kernel memory.
 397          */
 398         if (nlistf != NULL || memf != NULL)
 399                 setgid(getgid());
 400
 401         if (mflag) {
 402                 if (memf != NULL) {
 403                         if (kread(0, 0, 0) == 0)
 404                                 mbpr(nl[N_MBSTAT].n_value,
 405                                     nl[N_MBTYPES].n_value,
 406                                     nl[N_NMBCLUSTERS].n_value,
 407                                     nl[N_NMBJCLUSTERS].n_value,
 408                                     nl[N_NMBUFS].n_value,
 409                                     nl[N_NCPUS].n_value);
 410                 } else {
 411                         mbpr(0, 0, 0, 0, 0, 0);
 412                 }
 413                 exit(0);
 414         }
 415 #if 0
 416         /*
 417          * Keep file descriptors open to avoid overhead
 418          * of open/close on each call to get* routines.
 419          */
 420         sethostent(1);
 421         setnetent(1);
 422 #else
 423         /*
 424          * This does not make sense any more with DNS being default over
 425          * the files.  Doing a setXXXXent(1) causes a tcp connection to be
 426          * used for the queries, which is slower.
 427          */
 428 #endif
 429         if (iflag && !sflag) {
 430                 kread(0, 0, 0);
 431                 intpr(interval, nl[N_IFNET].n_value, NULL, nl[N_NCPUS].n_value);
 432                 exit(0);
 433         }
 434         if (rflag) {
 435                 kread(0, 0, 0);
 436                 if (sflag)
 437                         rt_stats();
 438                 else
 439                         routepr(nl[N_RTREE].n_value);
 440                 exit(0);
 441         }
 442         if (gflag) {
 443                 kread(0, 0, 0);
 444                 if (sflag) {
 445                         if (af == AF_INET || af == AF_UNSPEC)
 446                                 mrt_stats(nl[N_MRTSTAT].n_value);
 447 #ifdef INET6
 448                         if (af == AF_INET6 || af == AF_UNSPEC)
 449                                 mrt6_stats(nl[N_MRT6STAT].n_value);
 450 #endif
 451                 } else {
 452                         if (af == AF_INET || af == AF_UNSPEC)
 453                                 mroutepr(nl[N_MFCTABLE].n_value,
 454                                          nl[N_VIFTABLE].n_value);
 455 #ifdef INET6
 456                         if (af == AF_INET6 || af == AF_UNSPEC)
 457                                 mroute6pr(nl[N_MF6CTABLE].n_value,
 458                                           nl[N_MIF6TABLE].n_value);
 459 #endif
 460                 }
 461                 exit(0);
 462         }
 463
 464         kread(0, 0, 0);
 465         if (tp) {
 466                 printproto(tp, tp->pr_name, nl[N_NCPUS].n_value);
 467                 exit(0);
 468         }
 469         if (af == AF_INET || af == AF_UNSPEC)
 470                 for (tp = protox; tp->pr_name; tp++)
 471                         printproto(tp, tp->pr_name, nl[N_NCPUS].n_value);
 472 #ifdef INET6
 473         if (af == AF_INET6 || af == AF_UNSPEC)
 474                 for (tp = ip6protox; tp->pr_name; tp++)
 475                         printproto(tp, tp->pr_name, nl[N_NCPUS].n_value);
 476 #endif /*INET6*/
 477         if (af == AF_NETGRAPH || af == AF_UNSPEC)
 478                 for (tp = netgraphprotox; tp->pr_name; tp++)
 479                         printproto(tp, tp->pr_name, nl[N_NCPUS].n_value);
 480         if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag)
 481                 unixpr();
 482         exit(0);
 483 }
 484
 485 /*
 486  * Print out protocol statistics or control blocks (per sflag).
 487  * If the interface was not specifically requested, and the symbol
 488  * is not in the namelist, ignore this one.
 489  */
 490 static void
 491 printproto(struct protox *tp, const char *name, u_long ncpusaddr)
 492 {
 493         void (*pr)(u_long, const char *, int);
 494         u_long off;
 495
 496         if (sflag) {
 497                 if (iflag) {
 498                         if (tp->pr_istats)
 499                                 intpr(interval, nl[N_IFNET].n_value,
 500                                       tp->pr_istats, ncpusaddr);
 501                         else if (pflag)
 502                                 printf("%s: no per-interface stats routine\n",
 503                                     tp->pr_name);
 504                         return;
 505                 }
 506                 else {
 507                         pr = tp->pr_stats;
 508                         if (!pr) {
 509                                 if (pflag)
 510                                         printf("%s: no stats routine\n",
 511                                             tp->pr_name);
 512                                 return;
 513                         }
 514                         off = tp->pr_usesysctl ? tp->pr_usesysctl
 515                                 : nl[tp->pr_sindex].n_value;
 516                 }
 517         } else {
 518                 pr = tp->pr_cblocks;
 519                 if (!pr) {
 520                         if (pflag)
 521                                 printf("%s: no PCB routine\n", tp->pr_name);
 522                         return;
 523                 }
 524                 off = tp->pr_usesysctl ? tp->pr_usesysctl
 525                         : nl[tp->pr_index].n_value;
 526         }
 527         if (pr != NULL && (off || af != AF_UNSPEC))
 528                 (*pr)(off, name, af);
 529 }
 530
 531 /*
 532  * Read kernel memory, return 0 on success.
 533  */
 534 int
 535 kread(u_long addr, char *buf, int size)
 536 {
 537         if (kvmd == NULL) {
 538                 /*
 539                  * XXX.
 540                  */
 541                 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf);
 542                 if (kvmd != NULL) {
 543                         if (kvm_nlist(kvmd, nl) < 0) {
 544                                 if(nlistf)
 545                                         errx(1, "%s: kvm_nlist: %s", nlistf,
 546                                              kvm_geterr(kvmd));
 547                                 else
 548                                         errx(1, "kvm_nlist: %s", kvm_geterr(kvmd));
 549                         }
 550
 551                         if (nl[0].n_type == 0) {
 552                                 if(nlistf)
 553                                         errx(1, "%s: no namelist", nlistf);
 554                                 else
 555                                         errx(1, "no namelist");
 556                         }
 557                 } else {
 558                         warnx("kvm not available");
 559                         return(-1);
 560                 }
 561         }
 562         if (!buf)
 563                 return (0);
 564         if (kvm_read(kvmd, addr, buf, size) != size) {
 565                 warnx("%s", kvm_geterr(kvmd));
 566                 return (-1);
 567         }
 568         return (0);
 569 }
 570
 571 const char *
 572 plural(int n)
 573 {
 574         return (n != 1 ? "s" : "");
 575 }
 576
 577 const char *
 578 plurales(int n)
 579 {
 580         return (n != 1 ? "es" : "");
 581 }
 582
 583 /*
 584  * Find the protox for the given "well-known" name.
 585  */
 586 static struct protox *
 587 knownname(char *name)
 588 {
 589         struct protox **tpp, *tp;
 590
 591         for (tpp = protoprotox; *tpp; tpp++)
 592                 for (tp = *tpp; tp->pr_name; tp++)
 593                         if (strcmp(tp->pr_name, name) == 0)
 594                                 return (tp);
 595         return (NULL);
 596 }
 597
 598 /*
 599  * Find the protox corresponding to name.
 600  */
 601 static struct protox *
 602 name2protox(char *name)
 603 {
 604         struct protox *tp;
 605         char **alias;                   /* alias from p->aliases */
 606         struct protoent *p;
 607
 608         /*
 609          * Try to find the name in the list of "well-known" names. If that
 610          * fails, check if name is an alias for an Internet protocol.
 611          */
 612         if ((tp = knownname(name)) != NULL)
 613                 return (tp);
 614
 615         setprotoent(1);                 /* make protocol lookup cheaper */
 616         while ((p = getprotoent()) != NULL) {
 617                 /* assert: name not same as p->name */
 618                 for (alias = p->p_aliases; *alias; alias++)
 619                         if (strcmp(name, *alias) == 0) {
 620                                 endprotoent();
 621                                 return (knownname(p->p_name));
 622                         }
 623         }
 624         endprotoent();
 625         return (NULL);
 626 }
 627
 628 static void
 629 usage(void)
 630 {
 631         (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
 632 "usage: netstat [-AaLnPSW] [-c cpu] [-f protocol_family | -p protocol]\n"
 633 "               [-M core] [-N system]",
 634 "       netstat -i | -I interface [-aBbdhnt] [-f address_family]\n"
 635 "               [-M core] [-N system]",
 636 "       netstat -w wait [-I interface] [-dh] [-M core] [-N system]",
 637 "       netstat -s [-s] [-z] [-f protocol_family | -p protocol] [-M core]",
 638 "       netstat -i | -I interface -s [-f protocol_family | -p protocol]\n"
 639 "               [-M core] [-N system]",
 640 "       netstat -m [-M core] [-N system]",
 641 "       netstat -r [-AanW] [-f address_family] [-M core] [-N system]",
 642 "       netstat -rs [-s] [-M core] [-N system]",
 643 "       netstat -g [-W] [-f address_family] [-M core] [-N system]",
 644 "       netstat -gs [-s] [-f address_family] [-M core] [-N system]");
 645         exit(1);
 646 }