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__)
 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     prioflag;       /* show packet priority statistics */
 288 int     rflag;          /* show routing tables (or routing stats) */
 289 int     sflag;          /* show protocol statistics */
 290 int     tflag;          /* show i/f watchdog timers */
 291 int     Wflag;          /* wide display */
 292
 293 int     interval;       /* repeat interval for i/f stats */
 294
 295 char    *interface;     /* desired i/f for stats, or NULL for all i/fs */
 296 int     unit;           /* unit number for above */
 297
 298 int     af;             /* address family */
 299
 300 int
 301 main(argc, argv)
 302         int argc;
 303         char *argv[];
 304 {
 305         register struct protox *tp = NULL;  /* for printing cblocks & stats */
 306         int ch;
 307
 308         af = AF_UNSPEC;
 309
 310         while ((ch = getopt(argc, argv, "Aabdf:gI:iLlmnPp:rRstuWw:")) != -1)
 311                 switch(ch) {
 312                 case 'A':
 313                         Aflag = 1;
 314                         break;
 315                 case 'a':
 316                         aflag = 1;
 317                         break;
 318                 case 'b':
 319                         bflag = 1;
 320                         break;
 321                 case 'd':
 322                         dflag = 1;
 323                         break;
 324                 case 'f':
 325                         if (strcmp(optarg, "ipx") == 0)
 326                                 af = AF_IPX;
 327                         else if (strcmp(optarg, "inet") == 0)
 328                                 af = AF_INET;
 329 #ifdef INET6
 330                         else if (strcmp(optarg, "inet6") == 0)
 331                                 af = AF_INET6;
 332 #endif /*INET6*/
 333 #ifdef INET6
 334                         else if (strcmp(optarg, "pfkey") == 0)
 335                                 af = PF_KEY;
 336 #endif /*INET6*/
 337                         else if (strcmp(optarg, "unix") == 0)
 338                                 af = AF_UNIX;
 339                         else {
 340                                 errx(1, "%s: unknown address family", optarg);
 341                         }
 342                         break;
 343 #if defined(__APPLE__)
 344                 case 'g':
 345                         gflag = 1;
 346                         break;
 347 #endif
 348                 case 'I': {
 349                         char *cp;
 350
 351                         iflag = 1;
 352                         for (cp = interface = optarg; isalpha(*cp); cp++)
 353                                 continue;
 354                         unit = atoi(cp);
 355                         break;
 356                 }
 357                 case 'i':
 358                         iflag = 1;
 359                         break;
 360                 case 'l':
 361                         lflag = 1;
 362                         break;
 363                 case 'L':
 364                         Lflag = 1;
 365                         break;
 366                 case 'm':
 367                         mflag++;
 368                         break;
 369                 case 'n':
 370                         nflag = 1;
 371                         break;
 372                 case 'P':
 373                         prioflag = 1;
 374                         break;
 375                 case 'p':
 376                         if ((tp = name2protox(optarg)) == NULL) {
 377                                 errx(1,
 378                                      "%s: unknown or uninstrumented protocol",
 379                                      optarg);
 380                         }
 381                         pflag = 1;
 382                         break;
 383                 case 'r':
 384                         rflag = 1;
 385                         break;
 386                 case 's':
 387                         ++sflag;
 388                         break;
 389                 case 't':
 390                         tflag = 1;
 391                         break;
 392                 case 'u':
 393                         af = AF_UNIX;
 394                         break;
 395                 case 'W':
 396                         Wflag = 1;
 397                         break;
 398                 case 'w':
 399                         interval = atoi(optarg);
 400                         iflag = 1;
 401                         break;
 402                 case '?':
 403                 default:
 404                         usage();
 405                 }
 406         argv += optind;
 407         argc -= optind;
 408
 409 #define BACKWARD_COMPATIBILITY
 410 #ifdef  BACKWARD_COMPATIBILITY
 411         if (*argv) {
 412                 if (isdigit(**argv)) {
 413                         interval = atoi(*argv);
 414                         if (interval <= 0)
 415                                 usage();
 416                         ++argv;
 417                         iflag = 1;
 418                 }
 419         }
 420 #endif
 421
 422         if (mflag) {
 423                 mbpr();
 424                 exit(0);
 425         }
 426         if (iflag && !sflag) {
 427                 intpr(NULL);
 428                 exit(0);
 429         }
 430         if (rflag) {
 431                 if (sflag)
 432                         rt_stats();
 433                 else
 434                         routepr(nl[N_RTREE].n_value);
 435                 exit(0);
 436         }
 437 #if defined(__APPLE__)
 438         if (gflag) {
 439 #if !TARGET_OS_EMBEDDED
 440                 if (sflag) {
 441                         if (af == AF_INET || af == AF_UNSPEC)
 442                                 mrt_stats();
 443 #ifdef INET6
 444                         if (af == AF_INET6 || af == AF_UNSPEC)
 445                                 mrt6_stats();
 446 #endif
 447                 } else {
 448                         if (af == AF_INET || af == AF_UNSPEC)
 449                                 mroutepr();
 450 #ifdef INET6
 451                         if (af == AF_INET6 || af == AF_UNSPEC)
 452                                 mroute6pr();
 453 #endif
 454                 }
 455 #endif /* !TARGET_OS_EMBEDDED */
 456                 ifmalist_dump();
 457                 exit(0);
 458         }
 459 #endif
 460
 461         if (tp) {
 462                 printproto(tp, tp->pr_name);
 463                 exit(0);
 464         }
 465         if (af == AF_INET || af == AF_UNSPEC)
 466                 for (tp = protox; tp->pr_name; tp++)
 467                         printproto(tp, tp->pr_name);
 468 #ifdef INET6
 469         if (af == AF_INET6 || af == AF_UNSPEC)
 470                 for (tp = ip6protox; tp->pr_name; tp++)
 471                         printproto(tp, tp->pr_name);
 472 #endif /*INET6*/
 473 #ifdef IPSEC
 474         if (af == PF_KEY || af == AF_UNSPEC)
 475                 for (tp = pfkeyprotox; tp->pr_name; tp++)
 476                         printproto(tp, tp->pr_name);
 477 #endif /*IPSEC*/
 478         if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag)
 479                 unixpr();
 480 #ifdef SRVCACHE
 481         _serv_cache_close();
 482 #endif
 483         exit(0);
 484 }
 485
 486 /*
 487  * Print out protocol statistics or control blocks (per sflag).
 488  * If the interface was not specifically requested, and the symbol
 489  * is not in the namelist, ignore this one.
 490  */
 491 static void
 492 printproto(tp, name)
 493         register struct protox *tp;
 494         char *name;
 495 {
 496         void (*pr)(uint32_t, char *, int);
 497         uint32_t off;
 498
 499         if (sflag) {
 500                 if (iflag && !pflag) {
 501                         if (tp->pr_istats)
 502                                 intpr(tp->pr_istats);
 503                         else
 504                                 printf("%s: no per-interface stats routine\n",
 505                                     tp->pr_name);
 506                         return;
 507                 }
 508                 else {
 509                         pr = tp->pr_stats;
 510                         if (!pr) {
 511                                 if (pflag)
 512                                         printf("%s: no stats routine\n",
 513                                             tp->pr_name);
 514                                 return;
 515                         }
 516                         off = tp->pr_usesysctl ? tp->pr_usesysctl
 517                                 : nl[tp->pr_sindex].n_value;
 518                 }
 519         } else {
 520                 pr = tp->pr_cblocks;
 521                 if (!pr) {
 522                         if (pflag)
 523                                 printf("%s: no PCB routine\n", tp->pr_name);
 524                         return;
 525                 }
 526                 off = tp->pr_usesysctl ? tp->pr_usesysctl
 527                         : nl[tp->pr_index].n_value;
 528         }
 529         if (pr != NULL && (off || af != AF_UNSPEC)) {
 530                 if (sflag && iflag && pflag)
 531                         intervalpr(pr, off, name, af);
 532                 else
 533                         (*pr)(off, name, af);
 534         } else {
 535                 printf("### no stats for %s\n", name);
 536         }
 537 }
 538
 539 char *
 540 plural(int n)
 541 {
 542         return (n != 1 ? "s" : "");
 543 }
 544
 545 char *
 546 plurales(int n)
 547 {
 548         return (n != 1 ? "es" : "");
 549 }
 550
 551 /*
 552  * Find the protox for the given "well-known" name.
 553  */
 554 static struct protox *
 555 knownname(char *name)
 556 {
 557         struct protox **tpp, *tp;
 558
 559         for (tpp = protoprotox; *tpp; tpp++)
 560                 for (tp = *tpp; tp->pr_name; tp++)
 561                         if (strcmp(tp->pr_name, name) == 0)
 562                                 return (tp);
 563         return (NULL);
 564 }
 565
 566 /*
 567  * Find the protox corresponding to name.
 568  */
 569 static struct protox *
 570 name2protox(char *name)
 571 {
 572         struct protox *tp;
 573         char **alias;                   /* alias from p->aliases */
 574         struct protoent *p;
 575
 576         /*
 577          * Try to find the name in the list of "well-known" names. If that
 578          * fails, check if name is an alias for an Internet protocol.
 579          */
 580         if ((tp = knownname(name)) != NULL)
 581                 return (tp);
 582
 583         setprotoent(1);                 /* make protocol lookup cheaper */
 584         while ((p = getprotoent()) != NULL) {
 585                 /* assert: name not same as p->name */
 586                 for (alias = p->p_aliases; *alias; alias++)
 587                         if (strcmp(name, *alias) == 0) {
 588                                 endprotoent();
 589                                 return (knownname(p->p_name));
 590                         }
 591         }
 592         endprotoent();
 593         return (NULL);
 594 }
 595
 596 #define NETSTAT_USAGE "\
 597 Usage:  netstat [-AaLlnW] [-f address_family | -p protocol]\n\
 598         netstat [-gilns] [-f address_family]\n\
 599         netstat -i | -I interface [-w wait] [-abdgt]\n\
 600         netstat -s [-s] [-f address_family | -p protocol] [-w wait]\n\
 601         netstat -i | -I interface -s [-f address_family | -p protocol]\n\
 602         netstat -m [-m]\n\
 603         netstat -r [-Aaln] [-f address_family]\n\
 604         netstat -rs [-s]\n\
 605 "
 606
 607 static void
 608 usage(void)
 609 {
 610         (void) fprintf(stderr, "%s\n", NETSTAT_USAGE);
 611         exit(1);
 612 }