netstat.tproj/main.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.0 (the 'License').  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License."
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25  * Copyright (c) 1983, 1988, 1993
  26  *      Regents of the University of California.  All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that the following conditions
  30  * are met:
  31  * 1. Redistributions of source code must retain the above copyright
  32  *    notice, this list of conditions and the following disclaimer.
  33  * 2. Redistributions in binary form must reproduce the above copyright
  34  *    notice, this list of conditions and the following disclaimer in the
  35  *    documentation and/or other materials provided with the distribution.
  36  * 3. All advertising materials mentioning features or use of this software
  37  *    must display the following acknowledgement:
  38  *      This product includes software developed by the University of
  39  *      California, Berkeley and its contributors.
  40  * 4. Neither the name of the University nor the names of its contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  */
  56
  57 #ifndef lint
  58 char const copyright[] =
  59 "@(#) Copyright (c) 1983, 1988, 1993\n\
  60         Regents of the University of California.  All rights reserved.\n";
  61 #endif /* not lint */
  62
  63 #ifndef lint
  64 #if 0
  65 static char sccsid[] = "@(#)main.c      8.4 (Berkeley) 3/1/94";
  66 #endif
  67 static const char rcsid[] =
  68         "$Id: main.c,v 1.4 2002/03/05 20:35:14 lindak Exp $";
  69 #endif /* not lint */
  70
  71 #include <sys/param.h>
  72 #include <sys/file.h>
  73 #include <sys/protosw.h>
  74 #include <sys/socket.h>
  75
  76 #include <netinet/in.h>
  77
  78 #include <ctype.h>
  79 #include <err.h>
  80 #include <errno.h>
  81 #include <kvm.h>
  82 #include <limits.h>
  83 #include <netdb.h>
  84 #include <nlist.h>
  85 #include <paths.h>
  86 #include <stdio.h>
  87 #include <stdlib.h>
  88 #include <string.h>
  89 #include <unistd.h>
  90 #include "netstat.h"
  91 #include <sys/types.h>
  92 #include <sys/sysctl.h>
  93
  94
  95 /*
  96  * ----------------------------------------------------------------------------
  97  * "THE BEER-WARE LICENSE" (Revision 42):
  98  * <phk@FreeBSD.org> wrote this file.  As long as you retain this notice you
  99  * can do whatever you want with this stuff. If we meet some day, and you think
 100  * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
 101  * ----------------------------------------------------------------------------
 102  *
 103  * $Id: main.c,v 1.4 2002/03/05 20:35:14 lindak Exp $
 104  *
 105  */
 106
 107
 108 static struct nlist nl[] = {
 109 #define N_IFNET         0
 110         { "_ifnet" },
 111 #define N_IMP           1
 112         { "_imp_softc" },
 113 #define N_RTSTAT        2
 114         { "_rtstat" },
 115 #define N_UNIXSW        3
 116         { "_localsw" },
 117 #define N_IDP           4
 118         { "_nspcb"},
 119 #define N_IDPSTAT       5
 120         { "_idpstat"},
 121 #define N_SPPSTAT       6
 122         { "_spp_istat"},
 123 #define N_NSERR         7
 124         { "_ns_errstat"},
 125 #define N_CLNPSTAT      8
 126         { "_clnp_stat"},
 127 #define IN_NOTUSED      9
 128         { "_tp_inpcb" },
 129 #define ISO_TP          10
 130         { "_tp_refinfo" },
 131 #define N_TPSTAT        11
 132         { "_tp_stat" },
 133 #define N_ESISSTAT      12
 134         { "_esis_stat"},
 135 #define N_NIMP          13
 136         { "_nimp"},
 137 #define N_RTREE         14
 138         { "_rt_tables"},
 139 #define N_CLTP          15
 140         { "_cltb"},
 141 #define N_CLTPSTAT      16
 142         { "_cltpstat"},
 143 #define N_NFILE         17
 144         { "_nfile" },
 145 #define N_FILE          18
 146         { "_file" },
 147 #define N_MRTSTAT       19
 148         { "_mrtstat" },
 149 #define N_MFCTABLE      20
 150         { "_mfctable" },
 151 #define N_VIFTABLE      21
 152         { "_viftable" },
 153 #define N_IPX           22
 154         { "_ipxpcb"},
 155 #define N_IPXSTAT       23
 156         { "_ipxstat"},
 157 #define N_SPXSTAT       24
 158         { "_spx_istat"},
 159 #define N_DDPSTAT       25
 160         { "_ddpstat"},
 161 #define N_DDPCB         26
 162         { "_ddpcb"},
 163 #define N_NGSOCKS       27
 164         { "_ngsocklist"},
 165 #define N_IP6STAT       28
 166         { "_ip6stat" },
 167 #define N_ICMP6STAT     29
 168         { "_icmp6stat" },
 169 #define N_IPSECSTAT     30
 170         { "_ipsecstat" },
 171 #define N_IPSEC6STAT    31
 172         { "_ipsec6stat" },
 173 #define N_PIM6STAT      32
 174         { "_pim6stat" },
 175 #define N_MRT6PROTO     33
 176         { "_ip6_mrtproto" },
 177 #define N_MRT6STAT      34
 178         { "_mrt6stat" },
 179 #define N_MF6CTABLE     35
 180         { "_mf6ctable" },
 181 #define N_MIF6TABLE     36
 182         { "_mif6table" },
 183 #define N_PFKEYSTAT     37
 184         { "_pfkeystat" },
 185 #define N_MBSTAT        38
 186         { "_mbstat" },
 187 #define N_MBTYPES       39
 188         { "_mbtypes" },
 189 #define N_NMBCLUSTERS   40
 190         { "_nmbclusters" },
 191 #define N_NMBUFS        41
 192         { "_nmbufs" },
 193 #define N_RTTRASH       42
 194         { "_rttrash" },
 195         { "" },
 196 };
 197
 198
 199
 200 struct protox {
 201         u_char  pr_index;               /* index into nlist of cb head */
 202         u_char  pr_sindex;              /* index into nlist of stat block */
 203         u_char  pr_wanted;              /* 1 if wanted, 0 otherwise */
 204         void    (*pr_cblocks)(u_long, char *, int);
 205                                         /* control blocks printing routine */
 206         void    (*pr_stats)(u_long, char *, int);
 207                                         /* statistics printing routine */
 208         void    (*pr_istats)(char *);   /* per/if statistics printing routine */
 209         char    *pr_name;               /* well-known name */
 210         int     pr_usesysctl;           /* true if we use sysctl, not kvm */
 211 } protox[] = {
 212         { -1,           -1,             1,      protopr,
 213           tcp_stats,    NULL,           "tcp",  IPPROTO_TCP },
 214         { -1,           -1,             1,      protopr,
 215           udp_stats,    NULL,           "udp",  IPPROTO_UDP },
 216         { -1,           -1,             1,      protopr,
 217           NULL,         NULL,           "divert",IPPROTO_DIVERT },
 218         { -1,           -1,             1,      protopr,
 219           ip_stats,     NULL,           "ip",   IPPROTO_RAW },
 220         { -1,           -1,             1,      protopr,
 221           icmp_stats,   NULL,           "icmp", IPPROTO_ICMP },
 222         { -1,           -1,             1,      protopr,
 223           igmp_stats,   NULL,           "igmp", IPPROTO_IGMP },
 224 #ifdef IPSEC
 225         { -1,           N_IPSECSTAT,    1,      0,
 226           ipsec_stats,  NULL,           "ipsec",        0},
 227 #endif
 228 #if 0
 229         { -1,           -1,             1,      0,
 230           bdg_stats,    NULL,           "bdg",  1 /* bridging... */ },
 231 #endif
 232         { -1,           -1,             0,      0,
 233           0,            NULL,           0 }
 234 };
 235
 236 #ifdef INET6
 237 struct protox ip6protox[] = {
 238         { -1,           -1,             1,      protopr,
 239           tcp_stats,    NULL,           "tcp",  IPPROTO_TCP },
 240         { -1,           -1,             1,      protopr,
 241           udp_stats,    NULL,           "udp",  IPPROTO_UDP },
 242         { -1,           N_IP6STAT,      1,      protopr,
 243           ip6_stats,    ip6_ifstats,    "ip6",  IPPROTO_RAW },
 244         { -1,           N_ICMP6STAT,    1,      protopr,
 245           icmp6_stats,  icmp6_ifstats,  "icmp6",IPPROTO_ICMPV6 },
 246 #ifdef IPSEC
 247         { -1,           N_IPSEC6STAT,   1,      0,
 248           ipsec_stats,  NULL,           "ipsec6",0 },
 249 #endif
 250 #ifdef notyet
 251         { -1,           N_PIM6STAT,     1,      0,
 252           pim6_stats,   NULL,           "pim6", 0 },
 253 #endif
 254         { -1,           -1,             1,      0,
 255           rip6_stats,   NULL,           "rip6", 0 },
 256 #if 0
 257         { -1,           -1,             1,      0,
 258           bdg_stats,    NULL,           "bdg",  1 /* bridging... */ },
 259 #endif
 260         { -1,           -1,             0,      0,
 261           0,            NULL,           0,      0 }
 262 };
 263 #endif /*INET6*/
 264
 265 #ifdef IPSEC
 266 struct protox pfkeyprotox[] = {
 267         { -1,           N_PFKEYSTAT,    1,      0,
 268           pfkey_stats,  NULL,           "pfkey", 0 },
 269         { -1,           -1,             0,      0,
 270           0,            NULL,           0,      0 }
 271 };
 272 #endif
 273 #ifndef __APPLE__
 274 struct protox atalkprotox[] = {
 275         { N_DDPCB,      N_DDPSTAT,      1,      atalkprotopr,
 276           ddp_stats,    NULL,           "ddp" },
 277         { -1,           -1,             0,      0,
 278           0,            NULL,           0 }
 279 };
 280
 281 struct protox netgraphprotox[] = {
 282         { N_NGSOCKS,    -1,             1,      netgraphprotopr,
 283           NULL,         NULL,           "ctrl" },
 284         { N_NGSOCKS,    -1,             1,      netgraphprotopr,
 285           NULL,         NULL,           "data" },
 286         { -1,           NULL,           0,      0,
 287           0,            NULL,           0 }
 288 };
 289
 290 struct protox ipxprotox[] = {
 291         { N_IPX,        N_IPXSTAT,      1,      ipxprotopr,
 292           ipx_stats,    NULL,           "ipx",  0 },
 293         { N_IPX,        N_SPXSTAT,      1,      ipxprotopr,
 294           spx_stats,    NULL,           "spx",  0 },
 295         { -1,           -1,             0,      0,
 296           0,            NULL,           0,      0 }
 297 };
 298 #endif
 299 #ifdef NS
 300 struct protox nsprotox[] = {
 301         { N_IDP,        N_IDPSTAT,      1,      nsprotopr,
 302           idp_stats,    NULL,           "idp" },
 303         { N_IDP,        N_SPPSTAT,      1,      nsprotopr,
 304           spp_stats,    NULL,           "spp" },
 305         { -1,           N_NSERR,        1,      0,
 306           nserr_stats,  NULL,           "ns_err" },
 307         { -1,           -1,             0,      0,
 308           0,            NULL,           0 }
 309 };
 310 #endif
 311
 312 #ifdef ISO
 313 struct protox isoprotox[] = {
 314         { ISO_TP,       N_TPSTAT,       1,      iso_protopr,
 315           tp_stats,     NULL,           "tp" },
 316         { N_CLTP,       N_CLTPSTAT,     1,      iso_protopr,
 317           cltp_stats,   NULL,           "cltp" },
 318         { -1,           N_CLNPSTAT,     1,       0,
 319           clnp_stats,   NULL,           "clnp"},
 320         { -1,           N_ESISSTAT,     1,       0,
 321           esis_stats,   NULL,           "esis"},
 322         { -1,           -1,             0,      0,
 323           0,            NULL,           0 }
 324 };
 325 #endif
 326
 327 struct protox *protoprotox[] = {
 328                                          protox,
 329 #ifdef INET6
 330                                          ip6protox,
 331 #endif
 332 #ifdef IPSEC
 333                                          pfkeyprotox,
 334 #endif
 335 #ifndef __APPLE__
 336                                          ipxprotox, atalkprotox,
 337 #endif
 338 #ifdef NS
 339                                          nsprotox,
 340 #endif
 341 #ifdef ISO
 342                                          isoprotox,
 343 #endif
 344                                          NULL };
 345
 346 static void printproto (struct protox *, char *);
 347 static void usage (void);
 348 static struct protox *name2protox (char *);
 349 static struct protox *knownname (char *);
 350
 351 static kvm_t *kvmd;
 352 static char *nlistf = NULL, *memf = NULL;
 353
 354 int     Aflag;          /* show addresses of protocol control block */
 355 int     aflag;          /* show all sockets (including servers) */
 356 int     bflag;          /* show i/f total bytes in/out */
 357 int     dflag;          /* show i/f dropped packets */
 358 int     gflag;          /* show group (multicast) routing or stats */
 359 int     iflag;          /* show interfaces */
 360 int     lflag;          /* show routing table with use and ref */
 361 int     Lflag;          /* show size of listen queues */
 362 int     mflag;          /* show memory stats */
 363 int     nflag;          /* show addresses numerically */
 364 static int pflag;       /* show given protocol */
 365 int     rflag;          /* show routing tables (or routing stats) */
 366 int     sflag;          /* show protocol statistics */
 367 int     tflag;          /* show i/f watchdog timers */
 368 int     Wflag;          /* wide display */
 369
 370 int     interval;       /* repeat interval for i/f stats */
 371
 372 char    *interface;     /* desired i/f for stats, or NULL for all i/fs */
 373 int     unit;           /* unit number for above */
 374
 375 int     af;             /* address family */
 376
 377 int
 378 main(argc, argv)
 379         int argc;
 380         char *argv[];
 381 {
 382         register struct protox *tp = NULL;  /* for printing cblocks & stats */
 383         int ch;
 384
 385         af = AF_UNSPEC;
 386
 387         while ((ch = getopt(argc, argv, "Aabdf:gI:iLlM:mN:np:rstuWw:")) != -1)
 388                 switch(ch) {
 389                 case 'A':
 390                         Aflag = 1;
 391                         break;
 392                 case 'a':
 393                         aflag = 1;
 394                         break;
 395                 case 'b':
 396                         bflag = 1;
 397                         break;
 398                 case 'd':
 399                         dflag = 1;
 400                         break;
 401                 case 'f':
 402 #ifdef NS
 403                         if (strcmp(optarg, "ns") == 0)
 404                                 af = AF_NS;
 405                         else
 406 #endif
 407                         if (strcmp(optarg, "ipx") == 0)
 408                                 af = AF_IPX;
 409                         else if (strcmp(optarg, "inet") == 0)
 410                                 af = AF_INET;
 411 #ifdef INET6
 412                         else if (strcmp(optarg, "inet6") == 0)
 413                                 af = AF_INET6;
 414 #endif /*INET6*/
 415 #ifdef INET6
 416                         else if (strcmp(optarg, "pfkey") == 0)
 417                                 af = PF_KEY;
 418 #endif /*INET6*/
 419                         else if (strcmp(optarg, "unix") == 0)
 420                                 af = AF_UNIX;
 421 #ifndef __APPLE__
 422                         else if (strcmp(optarg, "atalk") == 0)
 423                                 af = AF_APPLETALK;
 424                         else if (strcmp(optarg, "ng") == 0
 425                             || strcmp(optarg, "netgraph") == 0)
 426                                 af = AF_NETGRAPH;
 427 #endif
 428 #ifdef ISO
 429                         else if (strcmp(optarg, "iso") == 0)
 430                                 af = AF_ISO;
 431 #endif
 432                         else {
 433                                 errx(1, "%s: unknown address family", optarg);
 434                         }
 435                         break;
 436                 case 'g':
 437                         gflag = 1;
 438                         break;
 439                 case 'I': {
 440                         char *cp;
 441
 442                         iflag = 1;
 443                         for (cp = interface = optarg; isalpha(*cp); cp++)
 444                                 continue;
 445                         unit = atoi(cp);
 446                         break;
 447                 }
 448                 case 'i':
 449                         iflag = 1;
 450                         break;
 451                 case 'l':
 452                         lflag = 1;
 453                         break;
 454                 case 'L':
 455                         Lflag = 1;
 456                         break;
 457                 case 'M':
 458                         memf = optarg;
 459                         break;
 460                 case 'm':
 461                         mflag = 1;
 462                         break;
 463                 case 'N':
 464                         nlistf = optarg;
 465                         break;
 466                 case 'n':
 467                         nflag = 1;
 468                         break;
 469                 case 'p':
 470                         if ((tp = name2protox(optarg)) == NULL) {
 471                                 errx(1,
 472                                      "%s: unknown or uninstrumented protocol",
 473                                      optarg);
 474                         }
 475                         pflag = 1;
 476                         break;
 477                 case 'r':
 478                         rflag = 1;
 479                         break;
 480                 case 's':
 481                         ++sflag;
 482                         break;
 483                 case 't':
 484                         tflag = 1;
 485                         break;
 486                 case 'u':
 487                         af = AF_UNIX;
 488                         break;
 489                 case 'W':
 490                         Wflag = 1;
 491                         break;
 492                 case 'w':
 493                         interval = atoi(optarg);
 494                         iflag = 1;
 495                         break;
 496                 case '?':
 497                 default:
 498                         usage();
 499                 }
 500         argv += optind;
 501         argc -= optind;
 502
 503 #define BACKWARD_COMPATIBILITY
 504 #ifdef  BACKWARD_COMPATIBILITY
 505         if (*argv) {
 506                 if (isdigit(**argv)) {
 507                         interval = atoi(*argv);
 508                         if (interval <= 0)
 509                                 usage();
 510                         ++argv;
 511                         iflag = 1;
 512                 }
 513                 if (*argv) {
 514                         nlistf = *argv;
 515                         if (*++argv)
 516                                 memf = *argv;
 517                 }
 518         }
 519 #endif
 520
 521         /*
 522          * Discard setgid privileges if not the running kernel so that bad
 523          * guys can't print interesting stuff from kernel memory.
 524          */
 525         if (nlistf != NULL || memf != NULL)
 526                 setgid(getgid());
 527
 528         if (mflag) {
 529                  //if (memf != NULL) {
 530                         if (kread(0, 0, 0) == 0)
 531                                 mbpr(nl[N_MBSTAT].n_value);
 532                                 //mbpr(nl[N_MBSTAT].n_value,
 533                                     // nl[N_MBTYPES].n_value,
 534                                     // nl[N_NMBCLUSTERS].n_value,
 535                                     // nl[N_NMBUFS].n_value);
 536                 //} else
 537                 //      mbpr(0, 0, 0, 0);
 538                         //mbpr(0) ;
 539                 exit(0);
 540         }
 541 #if 0
 542         /*
 543          * Keep file descriptors open to avoid overhead
 544          * of open/close on each call to get* routines.
 545          */
 546         sethostent(1);
 547         setnetent(1);
 548 #else
 549         /*
 550          * This does not make sense any more with DNS being default over
 551          * the files.  Doing a setXXXXent(1) causes a tcp connection to be
 552          * used for the queries, which is slower.
 553          */
 554 #endif
 555         if (iflag && !sflag) {
 556                 kread(0, 0, 0);
 557                 intpr(interval, nl[N_IFNET].n_value, NULL);
 558                 exit(0);
 559         }
 560         if (rflag) {
 561                 kread(0, 0, 0);
 562                 if (sflag)
 563                         rt_stats(nl[N_RTSTAT].n_value, nl[N_RTTRASH].n_value);
 564                 else
 565                         routepr(nl[N_RTREE].n_value);
 566                 exit(0);
 567         }
 568         if (gflag) {
 569                 kread(0, 0, 0);
 570                 if (sflag) {
 571                         if (af == AF_INET || af == AF_UNSPEC)
 572                                 mrt_stats(nl[N_MRTSTAT].n_value);
 573 #ifdef INET6
 574                         if (af == AF_INET6 || af == AF_UNSPEC)
 575                                 mrt6_stats(nl[N_MRT6STAT].n_value);
 576 #endif
 577                 } else {
 578                         if (af == AF_INET || af == AF_UNSPEC)
 579                                 mroutepr(nl[N_MFCTABLE].n_value,
 580                                          nl[N_VIFTABLE].n_value);
 581 #ifdef INET6
 582                         if (af == AF_INET6 || af == AF_UNSPEC)
 583                                 mroute6pr(nl[N_MF6CTABLE].n_value,
 584                                           nl[N_MIF6TABLE].n_value);
 585 #endif
 586                 }
 587                 exit(0);
 588         }
 589
 590         kread(0, 0, 0);
 591         if (tp) {
 592                 printproto(tp, tp->pr_name);
 593                 exit(0);
 594         }
 595         if (af == AF_INET || af == AF_UNSPEC)
 596                 for (tp = protox; tp->pr_name; tp++)
 597                         printproto(tp, tp->pr_name);
 598 #ifdef INET6
 599         if (af == AF_INET6 || af == AF_UNSPEC)
 600                 for (tp = ip6protox; tp->pr_name; tp++)
 601                         printproto(tp, tp->pr_name);
 602 #endif /*INET6*/
 603 #ifdef IPSEC
 604         if (af == PF_KEY || af == AF_UNSPEC)
 605                 for (tp = pfkeyprotox; tp->pr_name; tp++)
 606                         printproto(tp, tp->pr_name);
 607 #endif /*IPSEC*/
 608 #ifndef __APPLE__
 609         if (af == AF_IPX || af == AF_UNSPEC) {
 610                 kread(0, 0, 0);
 611                 for (tp = ipxprotox; tp->pr_name; tp++)
 612                         printproto(tp, tp->pr_name);
 613         }
 614         if (af == AF_APPLETALK || af == AF_UNSPEC)
 615                 for (tp = atalkprotox; tp->pr_name; tp++)
 616                         printproto(tp, tp->pr_name);
 617         if (af == AF_NETGRAPH || af == AF_UNSPEC)
 618                 for (tp = netgraphprotox; tp->pr_name; tp++)
 619                         printproto(tp, tp->pr_name);
 620 #endif
 621 #ifdef NS
 622         if (af == AF_NS || af == AF_UNSPEC)
 623                 for (tp = nsprotox; tp->pr_name; tp++)
 624                         printproto(tp, tp->pr_name);
 625 #endif
 626 #ifdef ISO
 627         if (af == AF_ISO || af == AF_UNSPEC)
 628                 for (tp = isoprotox; tp->pr_name; tp++)
 629                         printproto(tp, tp->pr_name);
 630 #endif
 631         if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag)
 632                 unixpr();
 633         exit(0);
 634 }
 635
 636 /*
 637  * Print out protocol statistics or control blocks (per sflag).
 638  * If the interface was not specifically requested, and the symbol
 639  * is not in the namelist, ignore this one.
 640  */
 641 static void
 642 printproto(tp, name)
 643         register struct protox *tp;
 644         char *name;
 645 {
 646         void (*pr)(u_long, char *, int);
 647         u_long off;
 648
 649         if (sflag) {
 650                 if (iflag) {
 651                         if (tp->pr_istats)
 652                                 intpr(interval, nl[N_IFNET].n_value,
 653                                       tp->pr_istats);
 654                         else if (pflag)
 655                                 printf("%s: no per-interface stats routine\n",
 656                                     tp->pr_name);
 657                         return;
 658                 }
 659                 else {
 660                         pr = tp->pr_stats;
 661                         if (!pr) {
 662                                 if (pflag)
 663                                         printf("%s: no stats routine\n",
 664                                             tp->pr_name);
 665                                 return;
 666                         }
 667                         off = tp->pr_usesysctl ? tp->pr_usesysctl
 668                                 : nl[tp->pr_sindex].n_value;
 669                 }
 670         } else {
 671                 pr = tp->pr_cblocks;
 672                 if (!pr) {
 673                         if (pflag)
 674                                 printf("%s: no PCB routine\n", tp->pr_name);
 675                         return;
 676                 }
 677                 off = tp->pr_usesysctl ? tp->pr_usesysctl
 678                         : nl[tp->pr_index].n_value;
 679         }
 680         if (pr != NULL && (off || af != AF_UNSPEC))
 681                 (*pr)(off, name, af);
 682 }
 683
 684 /*
 685  * Read kernel memory, return 0 on success.
 686  */
 687 int
 688 kread(u_long addr, char *buf, int size)
 689 {
 690         if (kvmd == 0) {
 691                 /*
 692                  * XXX.
 693                  */
 694                 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf);
 695                 if (kvmd != NULL) {
 696                         if (kvm_nlist(kvmd, nl) < 0) {
 697                                 if(nlistf)
 698                                         errx(1, "%s: kvm_nlist: %s", nlistf,
 699                                              kvm_geterr(kvmd));
 700                                 else
 701                                         errx(1, "kvm_nlist: %s", kvm_geterr(kvmd));
 702                         }
 703
 704                         if (nl[0].n_type == 0) {
 705                                 if(nlistf)
 706                                         errx(1, "%s: no namelist", nlistf);
 707                                 else
 708                                         errx(1, "no namelist");
 709                         }
 710                 } else {
 711                         warnx("kvm not available");
 712                         return(-1);
 713                 }
 714         }
 715         if (!buf)
 716                 return (0);
 717         if (kvm_read(kvmd, addr, buf, size) != size) {
 718                 warnx("%s", kvm_geterr(kvmd));
 719                 return (-1);
 720         }
 721         return (0);
 722 }
 723
 724 char *
 725 plural(int n)
 726 {
 727         return (n != 1 ? "s" : "");
 728 }
 729
 730 char *
 731 plurales(int n)
 732 {
 733         return (n != 1 ? "es" : "");
 734 }
 735
 736 /*
 737  * Find the protox for the given "well-known" name.
 738  */
 739 static struct protox *
 740 knownname(char *name)
 741 {
 742         struct protox **tpp, *tp;
 743
 744         for (tpp = protoprotox; *tpp; tpp++)
 745                 for (tp = *tpp; tp->pr_name; tp++)
 746                         if (strcmp(tp->pr_name, name) == 0)
 747                                 return (tp);
 748         return (NULL);
 749 }
 750
 751 /*
 752  * Find the protox corresponding to name.
 753  */
 754 static struct protox *
 755 name2protox(char *name)
 756 {
 757         struct protox *tp;
 758         char **alias;                   /* alias from p->aliases */
 759         struct protoent *p;
 760
 761         /*
 762          * Try to find the name in the list of "well-known" names. If that
 763          * fails, check if name is an alias for an Internet protocol.
 764          */
 765         if ((tp = knownname(name)) != NULL)
 766                 return (tp);
 767
 768         setprotoent(1);                 /* make protocol lookup cheaper */
 769         while ((p = getprotoent()) != NULL) {
 770                 /* assert: name not same as p->name */
 771                 for (alias = p->p_aliases; *alias; alias++)
 772                         if (strcmp(name, *alias) == 0) {
 773                                 endprotoent();
 774                                 return (knownname(p->p_name));
 775                         }
 776         }
 777         endprotoent();
 778         return (NULL);
 779 }
 780
 781 static void
 782 usage(void)
 783 {
 784         (void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
 785 "usage: netstat [-Aan] [-f address_family] [-M core] [-N system]",
 786 "       netstat [-bdghimnrs] [-f address_family] [-M core] [-N system]",
 787 "       netstat [-bdn] [-I interface] [-M core] [-N system] [-w wait]",
 788 "       netstat -m [-M core] [-N system]",
 789 "       netstat [-M core] [-N system] [-p protocol]");
 790         exit(1);
 791 }