netstat.tproj/main.c

   1 /*
   2  * Copyright (c) 2008 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_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. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * Copyright (c) 1983, 1988, 1993
  30  *      Regents of the University of California.  All rights reserved.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  * 3. All advertising materials mentioning features or use of this software
  41  *    must display the following acknowledgement:
  42  *      This product includes software developed by the University of
  43  *      California, Berkeley and its contributors.
  44  * 4. Neither the name of the University nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  58  * SUCH DAMAGE.
  59  */
  60
  61 #ifndef lint
  62 char const copyright[] =
  63 "@(#) Copyright (c) 1983, 1988, 1993\n\
  64         Regents of the University of California.  All rights reserved.\n";
  65 #endif /* not lint */
  66
  67 #include <sys/param.h>
  68 #include <sys/file.h>
  69 #include <sys/socket.h>
  70
  71 #include <netinet/in.h>
  72 #include <net/pfkeyv2.h>
  73
  74 #include <ctype.h>
  75 #include <err.h>
  76 #include <errno.h>
  77 #include <limits.h>
  78 #include <netdb.h>
  79 #include <nlist.h>
  80 #include <paths.h>
  81 #include <stdio.h>
  82 #include <stdlib.h>
  83 #include <string.h>
  84 #include <unistd.h>
  85 #include "netstat.h"
  86 #include <sys/types.h>
  87 #include <sys/sysctl.h>
  88
  89 #ifdef __APPLE__
  90 #include <TargetConditionals.h>
  91 #endif
  92
  93 /*
  94  * ----------------------------------------------------------------------------
  95  * "THE BEER-WARE LICENSE" (Revision 42):
  96  * <phk@FreeBSD.org> wrote this file.  As long as you retain this notice you
  97  * can do whatever you want with this stuff. If we meet some day, and you think
  98  * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
  99  * ----------------------------------------------------------------------------
 100  *
 101  * $Id: main.c,v 1.8 2004/10/14 22:24:09 lindak Exp $
 102  *
 103  */
 104
 105 static struct nlist nl[] = {
 106 #define N_IFNET         0
 107         { "_ifnet" },
 108 #define N_IMP           1
 109         { "_imp_softc" },
 110 #define N_RTSTAT        2
 111         { "_rtstat" },
 112 #define N_UNIXSW        3
 113         { "_localsw" },
 114 #define N_IDP           4
 115         { "_nspcb"},
 116 #define N_IDPSTAT       5
 117         { "_idpstat"},
 118 #define N_SPPSTAT       6
 119         { "_spp_istat"},
 120 #define N_NSERR         7
 121         { "_ns_errstat"},
 122 #define N_CLNPSTAT      8
 123         { "_clnp_stat"},
 124 #define IN_NOTUSED      9
 125         { "_tp_inpcb" },
 126 #define ISO_TP          10
 127         { "_tp_refinfo" },
 128 #define N_TPSTAT        11
 129         { "_tp_stat" },
 130 #define N_ESISSTAT      12
 131         { "_esis_stat"},
 132 #define N_NIMP          13
 133         { "_nimp"},
 134 #define N_RTREE         14
 135         { "_rt_tables"},
 136 #define N_CLTP          15
 137         { "_cltb"},
 138 #define N_CLTPSTAT      16
 139         { "_cltpstat"},
 140 #define N_NFILE         17
 141         { "_nfile" },
 142 #define N_FILE          18
 143         { "_file" },
 144 #define N_IPX           22
 145         { "_ipxpcb"},
 146 #define N_IPXSTAT       23
 147         { "_ipxstat"},
 148 #define N_SPXSTAT       24
 149         { "_spx_istat"},
 150 #define N_DDPSTAT       25
 151         { "_ddpstat"},
 152 #define N_DDPCB         26
 153         { "_ddpcb"},
 154 #define N_NGSOCKS       27
 155         { "_ngsocklist"},
 156 #define N_IP6STAT       28
 157         { "_ip6stat" },
 158 #define N_ICMP6STAT     29
 159         { "_icmp6stat" },
 160 #define N_IPSECSTAT     30
 161         { "_ipsecstat" },
 162 #define N_IPSEC6STAT    31
 163         { "_ipsec6stat" },
 164 #define N_PIM6STAT      32
 165         { "_pim6stat" },
 166 #define N_MRT6PROTO     33
 167         { "_ip6_mrtproto" },
 168 #define N_MRT6STAT      34
 169         { "_mrt6stat" },
 170 #define N_MF6CTABLE     35
 171         { "_mf6ctable" },
 172 #define N_MIF6TABLE     36
 173         { "_mif6table" },
 174 #define N_PFKEYSTAT     37
 175         { "_pfkeystat" },
 176 #define N_MBSTAT        38
 177         { "_mbstat" },
 178 #define N_MBTYPES       39
 179         { "_mbtypes" },
 180 #define N_NMBCLUSTERS   40
 181         { "_nmbclusters" },
 182 #define N_NMBUFS        41
 183         { "_nmbufs" },
 184 #define N_RTTRASH       42
 185         { "_rttrash" },
 186         { "" },
 187 };
 188
 189
 190 struct protox {
 191         u_char  pr_index;               /* index into nlist of cb head */
 192         u_char  pr_sindex;              /* index into nlist of stat block */
 193         u_char  pr_wanted;              /* 1 if wanted, 0 otherwise */
 194         void    (*pr_cblocks)(uint32_t, char *, int);
 195                                         /* control blocks printing routine */
 196         void    (*pr_stats)(uint32_t, char *, int);
 197                                         /* statistics printing routine */
 198         void    (*pr_istats)(char *);   /* per/if statistics printing routine */
 199         char    *pr_name;               /* well-known name */
 200         int     pr_usesysctl;           /* true if we use sysctl, not kvm */
 201 } protox[] = {
 202         { -1,           -1,             1,      protopr,
 203           tcp_stats,    NULL,           "tcp",  IPPROTO_TCP },
 204         { -1,           -1,             1,      protopr,
 205           udp_stats,    NULL,           "udp",  IPPROTO_UDP },
 206         { -1,           -1,             1,      protopr,
 207           NULL,         NULL,           "divert",IPPROTO_DIVERT },
 208         { -1,           -1,             1,      protopr,
 209           ip_stats,     NULL,           "ip",   IPPROTO_RAW },
 210         { -1,           -1,             1,      protopr,
 211           icmp_stats,   NULL,           "icmp", IPPROTO_ICMP },
 212         { -1,           -1,             1,      protopr,
 213           igmp_stats,   NULL,           "igmp", IPPROTO_IGMP },
 214 #ifdef IPSEC
 215         { -1,           -1,     1,      0,
 216           ipsec_stats,  NULL,           "ipsec",        IPPROTO_ESP},
 217 #endif
 218         { -1,           -1,             0,      0,
 219           0,            NULL,           0 }
 220 };
 221
 222 #ifdef INET6
 223 struct protox ip6protox[] = {
 224         { -1,           -1,             1,      protopr,
 225           tcp_stats,    NULL,           "tcp",  IPPROTO_TCP },
 226         { -1,           -1,             1,      protopr,
 227           udp_stats,    NULL,           "udp",  IPPROTO_UDP },
 228         { -1,           N_IP6STAT,      1,      protopr,
 229           ip6_stats,    ip6_ifstats,    "ip6",  IPPROTO_RAW },
 230         { -1,           N_ICMP6STAT,    1,      protopr,
 231           icmp6_stats,  icmp6_ifstats,  "icmp6",IPPROTO_ICMPV6 },
 232 #ifdef IPSEC
 233         { -1,           N_IPSEC6STAT,   1,      0,
 234           ipsec_stats,  NULL,           "ipsec6",IPPROTO_ESP },
 235 #endif
 236 #ifdef notyet
 237         { -1,           N_PIM6STAT,     1,      0,
 238           pim6_stats,   NULL,           "pim6", 0 },
 239 #endif
 240         { -1,           -1,             1,      0,
 241           rip6_stats,   NULL,           "rip6", IPPROTO_RAW },
 242         { -1,           -1,             0,      0,
 243           0,            NULL,           0,      0 }
 244 };
 245 #endif /*INET6*/
 246
 247 #ifdef IPSEC
 248 struct protox pfkeyprotox[] = {
 249         { -1,           N_PFKEYSTAT,    1,      0,
 250           pfkey_stats,  NULL,           "pfkey", PF_KEY_V2 },
 251         { -1,           -1,             0,      0,
 252           0,            NULL,           0,      0 }
 253 };
 254 #endif
 255
 256 struct protox *protoprotox[] = {
 257                                          protox,
 258 #ifdef INET6
 259                                          ip6protox,
 260 #endif
 261 #ifdef IPSEC
 262                                          pfkeyprotox,
 263 #endif
 264                                          NULL };
 265
 266 static void printproto (struct protox *, char *);
 267 static void usage (void);
 268 static struct protox *name2protox (char *);
 269 static struct protox *knownname (char *);
 270 #ifdef SRVCACHE
 271 extern void _serv_cache_close();
 272 #endif
 273
 274 int     Aflag;          /* show addresses of protocol control block */
 275 int     aflag;          /* show all sockets (including servers) */
 276 int     bflag;          /* show i/f total bytes in/out */
 277 int     dflag;          /* show i/f dropped packets */
 278 #if defined(__APPLE__) && !TARGET_OS_EMBEDDED
 279 int     gflag;          /* show group (multicast) routing or stats */
 280 #endif
 281 int     iflag;          /* show interfaces */
 282 int     lflag;          /* show routing table with use and ref */
 283 int     Lflag;          /* show size of listen queues */
 284 int     mflag;          /* show memory stats */
 285 int     nflag;          /* show addresses numerically */
 286 static int pflag;       /* show given protocol */
 287 int     rflag;          /* show routing tables (or routing stats) */
 288 int     sflag;          /* show protocol statistics */
 289 int     tflag;          /* show i/f watchdog timers */
 290 int     Wflag;          /* wide display */
 291
 292 int     interval;       /* repeat interval for i/f stats */
 293
 294 char    *interface;     /* desired i/f for stats, or NULL for all i/fs */
 295 int     unit;           /* unit number for above */
 296
 297 int     af;             /* address family */
 298
 299 int
 300 main(argc, argv)
 301         int argc;
 302         char *argv[];
 303 {
 304         register struct protox *tp = NULL;  /* for printing cblocks & stats */
 305         int ch;
 306
 307         af = AF_UNSPEC;
 308
 309         while ((ch = getopt(argc, argv, "Aabdf:gI:iLlmnp:rRstuWw:")) != -1)
 310                 switch(ch) {
 311                 case 'A':
 312                         Aflag = 1;
 313                         break;
 314                 case 'a':
 315                         aflag = 1;
 316                         break;
 317                 case 'b':
 318                         bflag = 1;
 319                         break;
 320                 case 'd':
 321                         dflag = 1;
 322                         break;
 323                 case 'f':
 324                         if (strcmp(optarg, "ipx") == 0)
 325                                 af = AF_IPX;
 326                         else if (strcmp(optarg, "inet") == 0)
 327                                 af = AF_INET;
 328 #ifdef INET6
 329                         else if (strcmp(optarg, "inet6") == 0)
 330                                 af = AF_INET6;
 331 #endif /*INET6*/
 332 #ifdef INET6
 333                         else if (strcmp(optarg, "pfkey") == 0)
 334                                 af = PF_KEY;
 335 #endif /*INET6*/
 336                         else if (strcmp(optarg, "unix") == 0)
 337                                 af = AF_UNIX;
 338                         else {
 339                                 errx(1, "%s: unknown address family", optarg);
 340                         }
 341                         break;
 342 #if defined(__APPLE__) && !TARGET_OS_EMBEDDED
 343                 case 'g':
 344                         gflag = 1;
 345                         break;
 346 #endif
 347                 case 'I': {
 348                         char *cp;
 349
 350                         iflag = 1;
 351                         for (cp = interface = optarg; isalpha(*cp); cp++)
 352                                 continue;
 353                         unit = atoi(cp);
 354                         break;
 355                 }
 356                 case 'i':
 357                         iflag = 1;
 358                         break;
 359                 case 'l':
 360                         lflag = 1;
 361                         break;
 362                 case 'L':
 363                         Lflag = 1;
 364                         break;
 365                 case 'm':
 366                         mflag++;
 367                         break;
 368                 case 'n':
 369                         nflag = 1;
 370                         break;
 371                 case 'p':
 372                         if ((tp = name2protox(optarg)) == NULL) {
 373                                 errx(1,
 374                                      "%s: unknown or uninstrumented protocol",
 375                                      optarg);
 376                         }
 377                         pflag = 1;
 378                         break;
 379                 case 'r':
 380                         rflag = 1;
 381                         break;
 382                 case 's':
 383                         ++sflag;
 384                         break;
 385                 case 't':
 386                         tflag = 1;
 387                         break;
 388                 case 'u':
 389                         af = AF_UNIX;
 390                         break;
 391                 case 'W':
 392                         Wflag = 1;
 393                         break;
 394                 case 'w':
 395                         interval = atoi(optarg);
 396                         iflag = 1;
 397                         break;
 398                 case '?':
 399                 default:
 400                         usage();
 401                 }
 402         argv += optind;
 403         argc -= optind;
 404
 405 #define BACKWARD_COMPATIBILITY
 406 #ifdef  BACKWARD_COMPATIBILITY
 407         if (*argv) {
 408                 if (isdigit(**argv)) {
 409                         interval = atoi(*argv);
 410                         if (interval <= 0)
 411                                 usage();
 412                         ++argv;
 413                         iflag = 1;
 414                 }
 415         }
 416 #endif
 417
 418         if (mflag) {
 419                 mbpr();
 420                 exit(0);
 421         }
 422         if (iflag && !sflag) {
 423                 intpr(NULL);
 424                 exit(0);
 425         }
 426         if (rflag) {
 427                 if (sflag)
 428                         rt_stats();
 429                 else
 430                         routepr(nl[N_RTREE].n_value);
 431                 exit(0);
 432         }
 433 #if defined(__APPLE__) && !TARGET_OS_EMBEDDED
 434         if (gflag) {
 435                 if (sflag) {
 436                         if (af == AF_INET || af == AF_UNSPEC)
 437                                 mrt_stats();
 438 #ifdef INET6
 439                         if (af == AF_INET6 || af == AF_UNSPEC)
 440                                 mrt6_stats();
 441 #endif
 442                 } else {
 443                         if (af == AF_INET || af == AF_UNSPEC)
 444                                 mroutepr();
 445 #ifdef INET6
 446                         if (af == AF_INET6 || af == AF_UNSPEC)
 447                                 mroute6pr();
 448 #endif
 449                 }
 450                 ifmalist_dump();
 451                 exit(0);
 452         }
 453 #endif
 454
 455         if (tp) {
 456                 printproto(tp, tp->pr_name);
 457                 exit(0);
 458         }
 459         if (af == AF_INET || af == AF_UNSPEC)
 460                 for (tp = protox; tp->pr_name; tp++)
 461                         printproto(tp, tp->pr_name);
 462 #ifdef INET6
 463         if (af == AF_INET6 || af == AF_UNSPEC)
 464                 for (tp = ip6protox; tp->pr_name; tp++)
 465                         printproto(tp, tp->pr_name);
 466 #endif /*INET6*/
 467 #ifdef IPSEC
 468         if (af == PF_KEY || af == AF_UNSPEC)
 469                 for (tp = pfkeyprotox; tp->pr_name; tp++)
 470                         printproto(tp, tp->pr_name);
 471 #endif /*IPSEC*/
 472         if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag)
 473                 unixpr();
 474 #ifdef SRVCACHE
 475         _serv_cache_close();
 476 #endif
 477         exit(0);
 478 }
 479
 480 /*
 481  * Print out protocol statistics or control blocks (per sflag).
 482  * If the interface was not specifically requested, and the symbol
 483  * is not in the namelist, ignore this one.
 484  */
 485 static void
 486 printproto(tp, name)
 487         register struct protox *tp;
 488         char *name;
 489 {
 490         void (*pr)(uint32_t, char *, int);
 491         uint32_t off;
 492
 493         if (sflag) {
 494                 if (iflag && !pflag) {
 495                         if (tp->pr_istats)
 496                                 intpr(tp->pr_istats);
 497                         else
 498                                 printf("%s: no per-interface stats routine\n",
 499                                     tp->pr_name);
 500                         return;
 501                 }
 502                 else {
 503                         pr = tp->pr_stats;
 504                         if (!pr) {
 505                                 if (pflag)
 506                                         printf("%s: no stats routine\n",
 507                                             tp->pr_name);
 508                                 return;
 509                         }
 510                         off = tp->pr_usesysctl ? tp->pr_usesysctl
 511                                 : nl[tp->pr_sindex].n_value;
 512                 }
 513         } else {
 514                 pr = tp->pr_cblocks;
 515                 if (!pr) {
 516                         if (pflag)
 517                                 printf("%s: no PCB routine\n", tp->pr_name);
 518                         return;
 519                 }
 520                 off = tp->pr_usesysctl ? tp->pr_usesysctl
 521                         : nl[tp->pr_index].n_value;
 522         }
 523         if (pr != NULL && (off || af != AF_UNSPEC)) {
 524                 if (sflag && iflag && pflag)
 525                         intervalpr(pr, off, name, af);
 526                 else
 527                         (*pr)(off, name, af);
 528         } else {
 529                 printf("### no stats for %s\n", name);
 530         }
 531 }
 532
 533 char *
 534 plural(int n)
 535 {
 536         return (n != 1 ? "s" : "");
 537 }
 538
 539 char *
 540 plurales(int n)
 541 {
 542         return (n != 1 ? "es" : "");
 543 }
 544
 545 /*
 546  * Find the protox for the given "well-known" name.
 547  */
 548 static struct protox *
 549 knownname(char *name)
 550 {
 551         struct protox **tpp, *tp;
 552
 553         for (tpp = protoprotox; *tpp; tpp++)
 554                 for (tp = *tpp; tp->pr_name; tp++)
 555                         if (strcmp(tp->pr_name, name) == 0)
 556                                 return (tp);
 557         return (NULL);
 558 }
 559
 560 /*
 561  * Find the protox corresponding to name.
 562  */
 563 static struct protox *
 564 name2protox(char *name)
 565 {
 566         struct protox *tp;
 567         char **alias;                   /* alias from p->aliases */
 568         struct protoent *p;
 569
 570         /*
 571          * Try to find the name in the list of "well-known" names. If that
 572          * fails, check if name is an alias for an Internet protocol.
 573          */
 574         if ((tp = knownname(name)) != NULL)
 575                 return (tp);
 576
 577         setprotoent(1);                 /* make protocol lookup cheaper */
 578         while ((p = getprotoent()) != NULL) {
 579                 /* assert: name not same as p->name */
 580                 for (alias = p->p_aliases; *alias; alias++)
 581                         if (strcmp(name, *alias) == 0) {
 582                                 endprotoent();
 583                                 return (knownname(p->p_name));
 584                         }
 585         }
 586         endprotoent();
 587         return (NULL);
 588 }
 589
 590 #define NETSTAT_USAGE "\
 591 Usage:  netstat [-AaLlnW] [-f address_family | -p protocol]\n\
 592         netstat [-gilns] [-f address_family]\n\
 593         netstat -i | -I interface [-w wait] [-abdgt]\n\
 594         netstat -s [-s] [-f address_family | -p protocol] [-w wait]\n\
 595         netstat -i | -I interface -s [-f address_family | -p protocol]\n\
 596         netstat -m [-m]\n\
 597         netstat -r [-Aaln] [-f address_family]\n\
 598         netstat -rs [-s]\n\
 599 "
 600
 601 static void
 602 usage(void)
 603 {
 604         (void) fprintf(stderr, "%s\n", NETSTAT_USAGE);
 605         exit(1);
 606 }