netstat.tproj/main.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*
  24  * Copyright (c) 1983, 1988, 1993
  25  *      Regents of the University of California.  All rights reserved.
  26  *
  27  * Redistribution and use in source and binary forms, with or without
  28  * modification, are permitted provided that the following conditions
  29  * are met:
  30  * 1. Redistributions of source code must retain the above copyright
  31  *    notice, this list of conditions and the following disclaimer.
  32  * 2. Redistributions in binary form must reproduce the above copyright
  33  *    notice, this list of conditions and the following disclaimer in the
  34  *    documentation and/or other materials provided with the distribution.
  35  * 3. All advertising materials mentioning features or use of this software
  36  *    must display the following acknowledgement:
  37  *      This product includes software developed by the University of
  38  *      California, Berkeley and its contributors.
  39  * 4. Neither the name of the University nor the names of its contributors
  40  *    may be used to endorse or promote products derived from this software
  41  *    without specific prior written permission.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  */
  55
  56 #ifndef lint
  57 char const copyright[] =
  58 "@(#) Copyright (c) 1983, 1988, 1993\n\
  59         Regents of the University of California.  All rights reserved.\n";
  60 #endif /* not lint */
  61
  62 #ifndef lint
  63 #if 0
  64 static char sccsid[] = "@(#)main.c      8.4 (Berkeley) 3/1/94";
  65 #endif
  66 static const char rcsid[] =
  67         "$Id: main.c,v 1.8 2004/10/14 22:24:09 lindak Exp $";
  68 #endif /* not lint */
  69
  70 #include <sys/param.h>
  71 #include <sys/file.h>
  72 #include <sys/socket.h>
  73
  74 #include <netinet/in.h>
  75 #include <net/pfkeyv2.h>
  76
  77 #include <ctype.h>
  78 #include <err.h>
  79 #include <errno.h>
  80 #include <kvm.h>
  81 #include <limits.h>
  82 #include <netdb.h>
  83 #include <nlist.h>
  84 #include <paths.h>
  85 #include <stdio.h>
  86 #include <stdlib.h>
  87 #include <string.h>
  88 #include <unistd.h>
  89 #include "netstat.h"
  90 #include <sys/types.h>
  91 #include <sys/sysctl.h>
  92
  93
  94 /*
  95  * ----------------------------------------------------------------------------
  96  * "THE BEER-WARE LICENSE" (Revision 42):
  97  * <phk@FreeBSD.org> wrote this file.  As long as you retain this notice you
  98  * can do whatever you want with this stuff. If we meet some day, and you think
  99  * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
 100  * ----------------------------------------------------------------------------
 101  *
 102  * $Id: main.c,v 1.8 2004/10/14 22:24:09 lindak Exp $
 103  *
 104  */
 105
 106 static struct nlist nl[] = {
 107 #define N_IFNET         0
 108         { "_ifnet" },
 109 #define N_IMP           1
 110         { "_imp_softc" },
 111 #define N_RTSTAT        2
 112         { "_rtstat" },
 113 #define N_UNIXSW        3
 114         { "_localsw" },
 115 #define N_IDP           4
 116         { "_nspcb"},
 117 #define N_IDPSTAT       5
 118         { "_idpstat"},
 119 #define N_SPPSTAT       6
 120         { "_spp_istat"},
 121 #define N_NSERR         7
 122         { "_ns_errstat"},
 123 #define N_CLNPSTAT      8
 124         { "_clnp_stat"},
 125 #define IN_NOTUSED      9
 126         { "_tp_inpcb" },
 127 #define ISO_TP          10
 128         { "_tp_refinfo" },
 129 #define N_TPSTAT        11
 130         { "_tp_stat" },
 131 #define N_ESISSTAT      12
 132         { "_esis_stat"},
 133 #define N_NIMP          13
 134         { "_nimp"},
 135 #define N_RTREE         14
 136         { "_rt_tables"},
 137 #define N_CLTP          15
 138         { "_cltb"},
 139 #define N_CLTPSTAT      16
 140         { "_cltpstat"},
 141 #define N_NFILE         17
 142         { "_nfile" },
 143 #define N_FILE          18
 144         { "_file" },
 145 #define N_IPX           22
 146         { "_ipxpcb"},
 147 #define N_IPXSTAT       23
 148         { "_ipxstat"},
 149 #define N_SPXSTAT       24
 150         { "_spx_istat"},
 151 #define N_DDPSTAT       25
 152         { "_ddpstat"},
 153 #define N_DDPCB         26
 154         { "_ddpcb"},
 155 #define N_NGSOCKS       27
 156         { "_ngsocklist"},
 157 #define N_IP6STAT       28
 158         { "_ip6stat" },
 159 #define N_ICMP6STAT     29
 160         { "_icmp6stat" },
 161 #define N_IPSECSTAT     30
 162         { "_ipsecstat" },
 163 #define N_IPSEC6STAT    31
 164         { "_ipsec6stat" },
 165 #define N_PIM6STAT      32
 166         { "_pim6stat" },
 167 #define N_MRT6PROTO     33
 168         { "_ip6_mrtproto" },
 169 #define N_MRT6STAT      34
 170         { "_mrt6stat" },
 171 #define N_MF6CTABLE     35
 172         { "_mf6ctable" },
 173 #define N_MIF6TABLE     36
 174         { "_mif6table" },
 175 #define N_PFKEYSTAT     37
 176         { "_pfkeystat" },
 177 #define N_MBSTAT        38
 178         { "_mbstat" },
 179 #define N_MBTYPES       39
 180         { "_mbtypes" },
 181 #define N_NMBCLUSTERS   40
 182         { "_nmbclusters" },
 183 #define N_NMBUFS        41
 184         { "_nmbufs" },
 185 #define N_RTTRASH       42
 186         { "_rttrash" },
 187         { "" },
 188 };
 189
 190
 191 struct protox {
 192         u_char  pr_index;               /* index into nlist of cb head */
 193         u_char  pr_sindex;              /* index into nlist of stat block */
 194         u_char  pr_wanted;              /* 1 if wanted, 0 otherwise */
 195         void    (*pr_cblocks)(u_long, char *, int);
 196                                         /* control blocks printing routine */
 197         void    (*pr_stats)(u_long, char *, int);
 198                                         /* statistics printing routine */
 199         void    (*pr_istats)(char *);   /* per/if statistics printing routine */
 200         char    *pr_name;               /* well-known name */
 201         int     pr_usesysctl;           /* true if we use sysctl, not kvm */
 202 } protox[] = {
 203         { -1,           -1,             1,      protopr,
 204           tcp_stats,    NULL,           "tcp",  IPPROTO_TCP },
 205         { -1,           -1,             1,      protopr,
 206           udp_stats,    NULL,           "udp",  IPPROTO_UDP },
 207         { -1,           -1,             1,      protopr,
 208           NULL,         NULL,           "divert",IPPROTO_DIVERT },
 209         { -1,           -1,             1,      protopr,
 210           ip_stats,     NULL,           "ip",   IPPROTO_RAW },
 211         { -1,           -1,             1,      protopr,
 212           icmp_stats,   NULL,           "icmp", IPPROTO_ICMP },
 213         { -1,           -1,             1,      protopr,
 214           igmp_stats,   NULL,           "igmp", IPPROTO_IGMP },
 215 #ifdef IPSEC
 216         { -1,           -1,     1,      0,
 217           ipsec_stats,  NULL,           "ipsec",        IPPROTO_ESP},
 218 #endif
 219 #if 0
 220         { -1,           -1,             1,      0,
 221           bdg_stats,    NULL,           "bdg",  1 /* bridging... */ },
 222 #endif
 223         { -1,           -1,             0,      0,
 224           0,            NULL,           0 }
 225 };
 226
 227 #ifdef INET6
 228 struct protox ip6protox[] = {
 229         { -1,           -1,             1,      protopr,
 230           tcp_stats,    NULL,           "tcp",  IPPROTO_TCP },
 231         { -1,           -1,             1,      protopr,
 232           udp_stats,    NULL,           "udp",  IPPROTO_UDP },
 233         { -1,           N_IP6STAT,      1,      protopr,
 234           ip6_stats,    ip6_ifstats,    "ip6",  IPPROTO_RAW },
 235         { -1,           N_ICMP6STAT,    1,      protopr,
 236           icmp6_stats,  icmp6_ifstats,  "icmp6",IPPROTO_ICMPV6 },
 237 #ifdef IPSEC
 238         { -1,           N_IPSEC6STAT,   1,      0,
 239           ipsec_stats,  NULL,           "ipsec6",IPPROTO_ESP },
 240 #endif
 241 #ifdef notyet
 242         { -1,           N_PIM6STAT,     1,      0,
 243           pim6_stats,   NULL,           "pim6", 0 },
 244 #endif
 245         { -1,           -1,             1,      0,
 246           rip6_stats,   NULL,           "rip6", IPPROTO_RAW },
 247 #if 0
 248         { -1,           -1,             1,      0,
 249           bdg_stats,    NULL,           "bdg",  1 /* bridging... */ },
 250 #endif
 251         { -1,           -1,             0,      0,
 252           0,            NULL,           0,      0 }
 253 };
 254 #endif /*INET6*/
 255
 256 #ifdef IPSEC
 257 struct protox pfkeyprotox[] = {
 258         { -1,           N_PFKEYSTAT,    1,      0,
 259           pfkey_stats,  NULL,           "pfkey", PF_KEY_V2 },
 260         { -1,           -1,             0,      0,
 261           0,            NULL,           0,      0 }
 262 };
 263 #endif
 264 #ifndef __APPLE__
 265 struct protox atalkprotox[] = {
 266         { N_DDPCB,      N_DDPSTAT,      1,      atalkprotopr,
 267           ddp_stats,    NULL,           "ddp" },
 268         { -1,           -1,             0,      0,
 269           0,            NULL,           0 }
 270 };
 271
 272 struct protox netgraphprotox[] = {
 273         { N_NGSOCKS,    -1,             1,      netgraphprotopr,
 274           NULL,         NULL,           "ctrl" },
 275         { N_NGSOCKS,    -1,             1,      netgraphprotopr,
 276           NULL,         NULL,           "data" },
 277         { -1,           NULL,           0,      0,
 278           0,            NULL,           0 }
 279 };
 280
 281 struct protox ipxprotox[] = {
 282         { N_IPX,        N_IPXSTAT,      1,      ipxprotopr,
 283           ipx_stats,    NULL,           "ipx",  0 },
 284         { N_IPX,        N_SPXSTAT,      1,      ipxprotopr,
 285           spx_stats,    NULL,           "spx",  0 },
 286         { -1,           -1,             0,      0,
 287           0,            NULL,           0,      0 }
 288 };
 289 #endif
 290 #ifdef NS
 291 struct protox nsprotox[] = {
 292         { N_IDP,        N_IDPSTAT,      1,      nsprotopr,
 293           idp_stats,    NULL,           "idp" },
 294         { N_IDP,        N_SPPSTAT,      1,      nsprotopr,
 295           spp_stats,    NULL,           "spp" },
 296         { -1,           N_NSERR,        1,      0,
 297           nserr_stats,  NULL,           "ns_err" },
 298         { -1,           -1,             0,      0,
 299           0,            NULL,           0 }
 300 };
 301 #endif
 302
 303 #ifdef ISO
 304 struct protox isoprotox[] = {
 305         { ISO_TP,       N_TPSTAT,       1,      iso_protopr,
 306           tp_stats,     NULL,           "tp" },
 307         { N_CLTP,       N_CLTPSTAT,     1,      iso_protopr,
 308           cltp_stats,   NULL,           "cltp" },
 309         { -1,           N_CLNPSTAT,     1,       0,
 310           clnp_stats,   NULL,           "clnp"},
 311         { -1,           N_ESISSTAT,     1,       0,
 312           esis_stats,   NULL,           "esis"},
 313         { -1,           -1,             0,      0,
 314           0,            NULL,           0 }
 315 };
 316 #endif
 317
 318 struct protox *protoprotox[] = {
 319                                          protox,
 320 #ifdef INET6
 321                                          ip6protox,
 322 #endif
 323 #ifdef IPSEC
 324                                          pfkeyprotox,
 325 #endif
 326 #ifndef __APPLE__
 327                                          ipxprotox, atalkprotox,
 328 #endif
 329 #ifdef NS
 330                                          nsprotox,
 331 #endif
 332 #ifdef ISO
 333                                          isoprotox,
 334 #endif
 335                                          NULL };
 336
 337 static void printproto (struct protox *, char *);
 338 static void usage (void);
 339 static struct protox *name2protox (char *);
 340 static struct protox *knownname (char *);
 341 #ifdef SRVCACHE
 342 extern void _serv_cache_close();
 343 #endif
 344
 345 #if 0
 346 static kvm_t *kvmd;
 347 #endif
 348 static char *nlistf = NULL, *memf = NULL;
 349
 350 int     Aflag;          /* show addresses of protocol control block */
 351 int     aflag;          /* show all sockets (including servers) */
 352 int     bflag;          /* show i/f total bytes in/out */
 353 int     dflag;          /* show i/f dropped packets */
 354 int     gflag;          /* show group (multicast) routing or stats */
 355 int     iflag;          /* show interfaces */
 356 int     lflag;          /* show routing table with use and ref */
 357 int     Lflag;          /* show size of listen queues */
 358 int     mflag;          /* show memory stats */
 359 int     nflag;          /* show addresses numerically */
 360 static int pflag;       /* show given protocol */
 361 int     rflag;          /* show routing tables (or routing stats) */
 362 int     sflag;          /* show protocol statistics */
 363 int     tflag;          /* show i/f watchdog timers */
 364 int     Wflag;          /* wide display */
 365
 366 int     interval;       /* repeat interval for i/f stats */
 367
 368 char    *interface;     /* desired i/f for stats, or NULL for all i/fs */
 369 int     unit;           /* unit number for above */
 370
 371 int     af;             /* address family */
 372
 373 int
 374 main(argc, argv)
 375         int argc;
 376         char *argv[];
 377 {
 378         register struct protox *tp = NULL;  /* for printing cblocks & stats */
 379         int ch;
 380
 381         af = AF_UNSPEC;
 382
 383         while ((ch = getopt(argc, argv, "Aabdf:gI:iLlM:mN:np:rRstuWw:")) != -1)
 384                 switch(ch) {
 385                 case 'A':
 386                         Aflag = 1;
 387                         break;
 388                 case 'a':
 389                         aflag = 1;
 390                         break;
 391                 case 'b':
 392                         bflag = 1;
 393                         break;
 394                 case 'd':
 395                         dflag = 1;
 396                         break;
 397                 case 'f':
 398 #ifdef NS
 399                         if (strcmp(optarg, "ns") == 0)
 400                                 af = AF_NS;
 401                         else
 402 #endif
 403                         if (strcmp(optarg, "ipx") == 0)
 404                                 af = AF_IPX;
 405                         else if (strcmp(optarg, "inet") == 0)
 406                                 af = AF_INET;
 407 #ifdef INET6
 408                         else if (strcmp(optarg, "inet6") == 0)
 409                                 af = AF_INET6;
 410 #endif /*INET6*/
 411 #ifdef INET6
 412                         else if (strcmp(optarg, "pfkey") == 0)
 413                                 af = PF_KEY;
 414 #endif /*INET6*/
 415                         else if (strcmp(optarg, "unix") == 0)
 416                                 af = AF_UNIX;
 417 #ifndef __APPLE__
 418                         else if (strcmp(optarg, "atalk") == 0)
 419                                 af = AF_APPLETALK;
 420                         else if (strcmp(optarg, "ng") == 0
 421                             || strcmp(optarg, "netgraph") == 0)
 422                                 af = AF_NETGRAPH;
 423 #endif
 424 #ifdef ISO
 425                         else if (strcmp(optarg, "iso") == 0)
 426                                 af = AF_ISO;
 427 #endif
 428                         else {
 429                                 errx(1, "%s: unknown address family", optarg);
 430                         }
 431                         break;
 432                 case 'g':
 433                         gflag = 1;
 434                         break;
 435                 case 'I': {
 436                         char *cp;
 437
 438                         iflag = 1;
 439                         for (cp = interface = optarg; isalpha(*cp); cp++)
 440                                 continue;
 441                         unit = atoi(cp);
 442                         break;
 443                 }
 444                 case 'i':
 445                         iflag = 1;
 446                         break;
 447                 case 'l':
 448                         lflag = 1;
 449                         break;
 450                 case 'L':
 451                         Lflag = 1;
 452                         break;
 453                 case 'M':
 454                         memf = optarg;
 455                         break;
 456                 case 'm':
 457                         mflag = 1;
 458                         break;
 459                 case 'N':
 460                         nlistf = optarg;
 461                         break;
 462                 case 'n':
 463                         nflag = 1;
 464                         break;
 465                 case 'p':
 466                         if ((tp = name2protox(optarg)) == NULL) {
 467                                 errx(1,
 468                                      "%s: unknown or uninstrumented protocol",
 469                                      optarg);
 470                         }
 471                         pflag = 1;
 472                         break;
 473                 case 'r':
 474                         rflag = 1;
 475                         break;
 476                 case 's':
 477                         ++sflag;
 478                         break;
 479                 case 't':
 480                         tflag = 1;
 481                         break;
 482                 case 'u':
 483                         af = AF_UNIX;
 484                         break;
 485                 case 'W':
 486                         Wflag = 1;
 487                         break;
 488                 case 'w':
 489                         interval = atoi(optarg);
 490                         iflag = 1;
 491                         break;
 492                 case '?':
 493                 default:
 494                         usage();
 495                 }
 496         argv += optind;
 497         argc -= optind;
 498
 499 #define BACKWARD_COMPATIBILITY
 500 #ifdef  BACKWARD_COMPATIBILITY
 501         if (*argv) {
 502                 if (isdigit(**argv)) {
 503                         interval = atoi(*argv);
 504                         if (interval <= 0)
 505                                 usage();
 506                         ++argv;
 507                         iflag = 1;
 508                 }
 509                 if (*argv) {
 510                         nlistf = *argv;
 511                         if (*++argv)
 512                                 memf = *argv;
 513                 }
 514         }
 515 #endif
 516
 517         /*
 518          * Discard setgid privileges if not the running kernel so that bad
 519          * guys can't print interesting stuff from kernel memory.
 520          */
 521         if (nlistf != NULL || memf != NULL)
 522                 setgid(getgid());
 523
 524         if (mflag) {
 525                 mbpr();
 526                 exit(0);
 527         }
 528 #if 0
 529         /*
 530          * Keep file descriptors open to avoid overhead
 531          * of open/close on each call to get* routines.
 532          */
 533         sethostent(1);
 534         setnetent(1);
 535 #else
 536         /*
 537          * This does not make sense any more with DNS being default over
 538          * the files.  Doing a setXXXXent(1) causes a tcp connection to be
 539          * used for the queries, which is slower.
 540          */
 541 #endif
 542         if (iflag && !sflag) {
 543                 intpr(NULL);
 544                 exit(0);
 545         }
 546         if (rflag) {
 547                 if (sflag)
 548                         rt_stats();
 549                 else
 550                         routepr(nl[N_RTREE].n_value);
 551                 exit(0);
 552         }
 553         if (gflag) {
 554                 if (sflag) {
 555                         if (af == AF_INET || af == AF_UNSPEC)
 556                                 mrt_stats();
 557 #ifdef INET6
 558                         if (af == AF_INET6 || af == AF_UNSPEC)
 559                                 mrt6_stats();
 560 #endif
 561                 } else {
 562                         if (af == AF_INET || af == AF_UNSPEC)
 563                                 mroutepr();
 564 #ifdef INET6
 565                         if (af == AF_INET6 || af == AF_UNSPEC)
 566                                 mroute6pr();
 567 #endif
 568                 }
 569                 exit(0);
 570         }
 571
 572         if (tp) {
 573                 printproto(tp, tp->pr_name);
 574                 exit(0);
 575         }
 576         if (af == AF_INET || af == AF_UNSPEC)
 577                 for (tp = protox; tp->pr_name; tp++)
 578                         printproto(tp, tp->pr_name);
 579 #ifdef INET6
 580         if (af == AF_INET6 || af == AF_UNSPEC)
 581                 for (tp = ip6protox; tp->pr_name; tp++)
 582                         printproto(tp, tp->pr_name);
 583 #endif /*INET6*/
 584 #ifdef IPSEC
 585         if (af == PF_KEY || af == AF_UNSPEC)
 586                 for (tp = pfkeyprotox; tp->pr_name; tp++)
 587                         printproto(tp, tp->pr_name);
 588 #endif /*IPSEC*/
 589 #ifndef __APPLE__
 590         if (af == AF_IPX || af == AF_UNSPEC) {
 591                 for (tp = ipxprotox; tp->pr_name; tp++)
 592                         printproto(tp, tp->pr_name);
 593         }
 594         if (af == AF_APPLETALK || af == AF_UNSPEC)
 595                 for (tp = atalkprotox; tp->pr_name; tp++)
 596                         printproto(tp, tp->pr_name);
 597         if (af == AF_NETGRAPH || af == AF_UNSPEC)
 598                 for (tp = netgraphprotox; tp->pr_name; tp++)
 599                         printproto(tp, tp->pr_name);
 600 #endif
 601 #ifdef NS
 602         if (af == AF_NS || af == AF_UNSPEC)
 603                 for (tp = nsprotox; tp->pr_name; tp++)
 604                         printproto(tp, tp->pr_name);
 605 #endif
 606 #ifdef ISO
 607         if (af == AF_ISO || af == AF_UNSPEC)
 608                 for (tp = isoprotox; tp->pr_name; tp++)
 609                         printproto(tp, tp->pr_name);
 610 #endif
 611         if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag)
 612                 unixpr();
 613 #ifdef SRVCACHE
 614         _serv_cache_close();
 615 #endif
 616         exit(0);
 617 }
 618
 619 /*
 620  * Print out protocol statistics or control blocks (per sflag).
 621  * If the interface was not specifically requested, and the symbol
 622  * is not in the namelist, ignore this one.
 623  */
 624 static void
 625 printproto(tp, name)
 626         register struct protox *tp;
 627         char *name;
 628 {
 629         void (*pr)(u_long, char *, int);
 630         u_long off;
 631
 632         if (sflag) {
 633                 if (iflag) {
 634                         if (tp->pr_istats)
 635                                 intpr(tp->pr_istats);
 636                         else if (pflag)
 637                                 printf("%s: no per-interface stats routine\n",
 638                                     tp->pr_name);
 639                         return;
 640                 }
 641                 else {
 642                         pr = tp->pr_stats;
 643                         if (!pr) {
 644                                 if (pflag)
 645                                         printf("%s: no stats routine\n",
 646                                             tp->pr_name);
 647                                 return;
 648                         }
 649                         off = tp->pr_usesysctl ? tp->pr_usesysctl
 650                                 : nl[tp->pr_sindex].n_value;
 651                 }
 652         } else {
 653                 pr = tp->pr_cblocks;
 654                 if (!pr) {
 655                         if (pflag)
 656                                 printf("%s: no PCB routine\n", tp->pr_name);
 657                         return;
 658                 }
 659                 off = tp->pr_usesysctl ? tp->pr_usesysctl
 660                         : nl[tp->pr_index].n_value;
 661         }
 662         if (pr != NULL && (off || af != AF_UNSPEC))
 663                 (*pr)(off, name, af);
 664         else
 665                 printf("### no stats for %s\n", name);
 666 }
 667
 668 /*
 669  * Read kernel memory, return 0 on success.
 670  */
 671 #if 0
 672 int
 673 kread(u_long addr, char *buf, int size)
 674 {
 675         if (kvmd == 0) {
 676                 /*
 677                  * XXX.
 678                  */
 679                 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf);
 680                 if (kvmd != NULL) {
 681                         if (kvm_nlist(kvmd, nl) < 0) {
 682                                 if(nlistf)
 683                                         errx(1, "%s: kvm_nlist: %s", nlistf,
 684                                              kvm_geterr(kvmd));
 685                                 else
 686                                         errx(1, "kvm_nlist: %s", kvm_geterr(kvmd));
 687                         }
 688
 689                         if (nl[0].n_type == 0) {
 690                                 if(nlistf)
 691                                         errx(1, "%s: no namelist", nlistf);
 692                                 else
 693                                         errx(1, "no namelist");
 694                         }
 695                 } else {
 696                         warnx("kvm not available");
 697                         return(-1);
 698                 }
 699         }
 700         if (!buf)
 701                 return (0);
 702         if (kvm_read(kvmd, addr, buf, size) != size) {
 703                 warnx("%s", kvm_geterr(kvmd));
 704                 return (-1);
 705         }
 706         return (0);
 707 }
 708 #endif
 709
 710 char *
 711 plural(int n)
 712 {
 713         return (n != 1 ? "s" : "");
 714 }
 715
 716 char *
 717 plurales(int n)
 718 {
 719         return (n != 1 ? "es" : "");
 720 }
 721
 722 /*
 723  * Find the protox for the given "well-known" name.
 724  */
 725 static struct protox *
 726 knownname(char *name)
 727 {
 728         struct protox **tpp, *tp;
 729
 730         for (tpp = protoprotox; *tpp; tpp++)
 731                 for (tp = *tpp; tp->pr_name; tp++)
 732                         if (strcmp(tp->pr_name, name) == 0)
 733                                 return (tp);
 734         return (NULL);
 735 }
 736
 737 /*
 738  * Find the protox corresponding to name.
 739  */
 740 static struct protox *
 741 name2protox(char *name)
 742 {
 743         struct protox *tp;
 744         char **alias;                   /* alias from p->aliases */
 745         struct protoent *p;
 746
 747         /*
 748          * Try to find the name in the list of "well-known" names. If that
 749          * fails, check if name is an alias for an Internet protocol.
 750          */
 751         if ((tp = knownname(name)) != NULL)
 752                 return (tp);
 753
 754         setprotoent(1);                 /* make protocol lookup cheaper */
 755         while ((p = getprotoent()) != NULL) {
 756                 /* assert: name not same as p->name */
 757                 for (alias = p->p_aliases; *alias; alias++)
 758                         if (strcmp(name, *alias) == 0) {
 759                                 endprotoent();
 760                                 return (knownname(p->p_name));
 761                         }
 762         }
 763         endprotoent();
 764         return (NULL);
 765 }
 766
 767 static void
 768 usage(void)
 769 {
 770         (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n",
 771 "usage: netstat [-Aan] [-f address_family] [-M core] [-N system]",
 772 "       netstat [-bdghimnrs] [-f address_family] [-M core] [-N system]",
 773 "       netstat [-bdn] [-I interface] [-M core] [-N system] [-w wait]",
 774 "       netstat -m [-M core] [-N system]",
 775 "       netstat [-M core] [-N system] [-p protocol]");
 776         exit(1);
 777 }