netstat.tproj/main.c

   1 /*
   2  * Copyright (c) 2008-2014 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 #include <sys/sys_domain.h>
  71
  72 #include <netinet/in.h>
  73 #include <net/pfkeyv2.h>
  74
  75 #include <ctype.h>
  76 #include <err.h>
  77 #include <errno.h>
  78 #include <limits.h>
  79 #include <netdb.h>
  80 #include <nlist.h>
  81 #include <paths.h>
  82 #include <stdio.h>
  83 #include <stdlib.h>
  84 #include <string.h>
  85 #include <unistd.h>
  86 #include "netstat.h"
  87 #include <sys/types.h>
  88 #include <sys/sysctl.h>
  89
  90 #ifdef __APPLE__
  91 #include <TargetConditionals.h>
  92 #endif
  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 struct protox {
 107         void    (*pr_cblocks)(uint32_t, char *, int);
 108                                         /* control blocks printing routine */
 109         void    (*pr_stats)(uint32_t, char *, int);
 110                                         /* statistics printing routine */
 111         void    (*pr_istats)(char *);   /* per/if statistics printing routine */
 112         char    *pr_name;               /* well-known name */
 113         int     pr_protocol;
 114 } protox[] = {
 115         { protopr,      tcp_stats,      NULL,   "tcp",  IPPROTO_TCP },
 116         { protopr,      udp_stats,      NULL,   "udp",  IPPROTO_UDP },
 117         { protopr,      NULL,           NULL,   "divert", IPPROTO_DIVERT },
 118         { protopr,      ip_stats,       NULL,   "ip",   IPPROTO_RAW },
 119         { protopr,      icmp_stats,     NULL,   "icmp", IPPROTO_ICMP },
 120         { protopr,      igmp_stats,     NULL,   "igmp", IPPROTO_IGMP },
 121 #ifdef IPSEC
 122         { NULL,         ipsec_stats,    NULL,   "ipsec", IPPROTO_ESP},
 123 #endif
 124         { NULL,         arp_stats,      NULL,   "arp",  0 },
 125         { mptcppr,      mptcp_stats,    NULL,   "mptcp", IPPROTO_TCP },
 126         { NULL,         NULL,           NULL,   NULL,   0 }
 127 };
 128
 129 #ifdef INET6
 130 struct protox ip6protox[] = {
 131         { protopr,      tcp_stats,      NULL,   "tcp",  IPPROTO_TCP },
 132         { protopr,      udp_stats,      NULL,   "udp",  IPPROTO_UDP },
 133         { protopr,      ip6_stats,      ip6_ifstats,    "ip6",  IPPROTO_RAW },
 134         { protopr,      icmp6_stats,    icmp6_ifstats,  "icmp6",IPPROTO_ICMPV6 },
 135 #ifdef IPSEC
 136         { NULL,         ipsec_stats,    NULL,   "ipsec6", IPPROTO_ESP },
 137 #endif
 138         { NULL,         rip6_stats,     NULL,   "rip6", IPPROTO_RAW },
 139         { mptcppr,      mptcp_stats,    NULL,   "mptcp", IPPROTO_TCP },
 140         { NULL,         NULL,           NULL,   NULL,   0 }
 141 };
 142 #endif /*INET6*/
 143
 144 #ifdef IPSEC
 145 struct protox pfkeyprotox[] = {
 146         { NULL,         pfkey_stats,    NULL,   "pfkey", PF_KEY_V2 },
 147         { NULL,         NULL,           NULL,   NULL,   0 }
 148 };
 149 #endif
 150
 151
 152 struct protox systmprotox[] = {
 153         { systmpr,      NULL,           NULL,   "reg", 0 },
 154         { systmpr,      kevt_stats,             NULL,   "kevt", SYSPROTO_EVENT },
 155         { systmpr,      kctl_stats,     NULL,   "kctl", SYSPROTO_CONTROL },
 156         { NULL,         NULL,           NULL,   NULL,   0 }
 157 };
 158
 159 struct protox *protoprotox[] = {
 160         protox,
 161 #ifdef INET6
 162         ip6protox,
 163 #endif
 164 #ifdef IPSEC
 165         pfkeyprotox,
 166 #endif
 167         systmprotox,
 168         NULL
 169 };
 170
 171 static void printproto (struct protox *, char *);
 172 static void usage (void);
 173 static struct protox *name2protox (char *);
 174 static struct protox *knownname (char *);
 175 #ifdef SRVCACHE
 176 extern void _serv_cache_close();
 177 #endif
 178
 179 int     Aflag;          /* show addresses of protocol control block */
 180 int     aflag;          /* show all sockets (including servers) */
 181 int     bflag;          /* show i/f total bytes in/out */
 182 int     cflag;          /* show specific classq */
 183 int     dflag;          /* show i/f dropped packets */
 184 int     Fflag;          /* show i/f forwarded packets */
 185 #if defined(__APPLE__)
 186 int     gflag;          /* show group (multicast) routing or stats */
 187 #endif
 188 int     iflag;          /* show interfaces */
 189 int     lflag;          /* show routing table with use and ref */
 190 int     Lflag;          /* show size of listen queues */
 191 int     mflag;          /* show memory stats */
 192 int     nflag;          /* show addresses numerically */
 193 static int pflag;       /* show given protocol */
 194 int     prioflag = -1;  /* show packet priority statistics */
 195 int     Rflag;          /* show reachability information */
 196 int     rflag;          /* show routing tables (or routing stats) */
 197 int     sflag;          /* show protocol statistics */
 198 int     tflag;          /* show i/f watchdog timers */
 199 int     vflag;          /* more verbose */
 200 int     Wflag;          /* wide display */
 201 int     qflag;          /* classq stats display */
 202 int     Qflag;          /* opportunistic polling stats display */
 203 int     xflag;          /* show extended link-layer reachability information */
 204
 205 int     cq = -1;        /* send classq index (-1 for all) */
 206 int     interval;       /* repeat interval for i/f stats */
 207
 208 char    *interface;     /* desired i/f for stats, or NULL for all i/fs */
 209 int     unit;           /* unit number for above */
 210
 211 int     af;             /* address family */
 212
 213 int
 214 main(argc, argv)
 215         int argc;
 216         char *argv[];
 217 {
 218         register struct protox *tp = NULL;  /* for printing cblocks & stats */
 219         int ch;
 220
 221         af = AF_UNSPEC;
 222
 223         while ((ch = getopt(argc, argv, "Aabc:dFf:gI:iLlmnP:p:qQrRstuvWw:x")) != -1)
 224                 switch(ch) {
 225                 case 'A':
 226                         Aflag = 1;
 227                         break;
 228                 case 'a':
 229                         aflag = 1;
 230                         break;
 231                 case 'b':
 232                         bflag = 1;
 233                         break;
 234                 case 'c':
 235                         cflag = 1;
 236                         cq = atoi(optarg);
 237                         break;
 238                 case 'd':
 239                         dflag = 1;
 240                         break;
 241                 case 'F':
 242                         Fflag = 1;
 243                         break;
 244                 case 'f':
 245                         if (strcmp(optarg, "ipx") == 0)
 246                                 af = AF_IPX;
 247                         else if (strcmp(optarg, "inet") == 0)
 248                                 af = AF_INET;
 249 #ifdef INET6
 250                         else if (strcmp(optarg, "inet6") == 0)
 251                                 af = AF_INET6;
 252 #endif /*INET6*/
 253 #ifdef INET6
 254                         else if (strcmp(optarg, "pfkey") == 0)
 255                                 af = PF_KEY;
 256 #endif /*INET6*/
 257                         else if (strcmp(optarg, "unix") == 0)
 258                                 af = AF_UNIX;
 259                         else if (strcmp(optarg, "systm") == 0)
 260                                 af = AF_SYSTEM;
 261                         else {
 262                                 errx(1, "%s: unknown address family", optarg);
 263                         }
 264                         break;
 265 #if defined(__APPLE__)
 266                 case 'g':
 267                         gflag = 1;
 268                         break;
 269 #endif
 270                 case 'I': {
 271                         char *cp;
 272
 273                         iflag = 1;
 274                         for (cp = interface = optarg; isalpha(*cp); cp++)
 275                                 continue;
 276                         unit = atoi(cp);
 277                         break;
 278                 }
 279                 case 'i':
 280                         iflag = 1;
 281                         break;
 282                 case 'l':
 283                         lflag = 1;
 284                         break;
 285                 case 'L':
 286                         Lflag = 1;
 287                         break;
 288                 case 'm':
 289                         mflag++;
 290                         break;
 291                 case 'n':
 292                         nflag = 1;
 293                         break;
 294                 case 'P':
 295                         prioflag = atoi(optarg);
 296                         break;
 297                 case 'p':
 298                         if ((tp = name2protox(optarg)) == NULL) {
 299                                 errx(1,
 300                                      "%s: unknown or uninstrumented protocol",
 301                                      optarg);
 302                         }
 303                         pflag = 1;
 304                         break;
 305                 case 'q':
 306                         qflag++;
 307                         break;
 308                 case 'Q':
 309                         Qflag++;
 310                         break;
 311                 case 'R':
 312                         Rflag = 1;
 313                         break;
 314                 case 'r':
 315                         rflag = 1;
 316                         break;
 317                 case 's':
 318                         ++sflag;
 319                         break;
 320                 case 't':
 321                         tflag = 1;
 322                         break;
 323                 case 'u':
 324                         af = AF_UNIX;
 325                         break;
 326                 case 'v':
 327                         vflag++;
 328                         break;
 329                 case 'W':
 330                         Wflag = 1;
 331                         break;
 332                 case 'w':
 333                         interval = atoi(optarg);
 334                         iflag = 1;
 335                         break;
 336                 case 'x':
 337                         xflag = 1;
 338                         Rflag = 1;
 339                         break;
 340                 case '?':
 341                 default:
 342                         usage();
 343                 }
 344         argv += optind;
 345         argc -= optind;
 346
 347 #define BACKWARD_COMPATIBILITY
 348 #ifdef  BACKWARD_COMPATIBILITY
 349         if (*argv) {
 350                 if (isdigit(**argv)) {
 351                         interval = atoi(*argv);
 352                         if (interval <= 0)
 353                                 usage();
 354                         ++argv;
 355                         iflag = 1;
 356                 }
 357         }
 358 #endif
 359
 360         if (mflag) {
 361                 mbpr();
 362                 exit(0);
 363         }
 364         if (iflag && !sflag && !gflag && !qflag && !Qflag) {
 365                 if (Rflag)
 366                         intpr_ri(NULL);
 367                 else
 368                         intpr(NULL);
 369                 exit(0);
 370         }
 371         if (rflag) {
 372                 if (sflag)
 373                         rt_stats();
 374                 else
 375                         routepr();
 376                 exit(0);
 377         }
 378         if (qflag || Qflag) {
 379                 if (interface == NULL) {
 380                         fprintf(stderr, "%s statistics option "
 381                             "requires interface name\n", qflag ? "Queue" :
 382                             "Polling");
 383                 } else if (qflag) {
 384                         aqstatpr();
 385                 } else {
 386                         rxpollstatpr();
 387                 }
 388                 exit(0);
 389         }
 390
 391 #if defined(__APPLE__)
 392         if (gflag) {
 393                 ifmalist_dump();
 394                 exit(0);
 395         }
 396 #endif
 397
 398         if (tp) {
 399                 printproto(tp, tp->pr_name);
 400                 exit(0);
 401         }
 402         if (af == AF_INET || af == AF_UNSPEC)
 403                 for (tp = protox; tp->pr_name; tp++)
 404                         printproto(tp, tp->pr_name);
 405 #ifdef INET6
 406         if (af == AF_INET6 || af == AF_UNSPEC)
 407                 for (tp = ip6protox; tp->pr_name; tp++)
 408                         printproto(tp, tp->pr_name);
 409 #endif /*INET6*/
 410 #ifdef IPSEC
 411         if (af == PF_KEY || af == AF_UNSPEC)
 412                 for (tp = pfkeyprotox; tp->pr_name; tp++)
 413                         printproto(tp, tp->pr_name);
 414 #endif /*IPSEC*/
 415         if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag)
 416                 unixpr();
 417
 418         if ((af == AF_SYSTEM || af == AF_UNSPEC) && !Lflag)
 419                 for (tp = systmprotox; tp->pr_name; tp++)
 420                         printproto(tp, tp->pr_name);
 421
 422 #ifdef SRVCACHE
 423         _serv_cache_close();
 424 #endif
 425         exit(0);
 426 }
 427
 428 /*
 429  * Print out protocol statistics or control blocks (per sflag).
 430  * If the interface was not specifically requested, and the symbol
 431  * is not in the namelist, ignore this one.
 432  */
 433 static void
 434 printproto(tp, name)
 435         register struct protox *tp;
 436         char *name;
 437 {
 438         void (*pr)(uint32_t, char *, int);
 439         uint32_t off;
 440
 441         if (sflag) {
 442                 if (iflag && !pflag) {
 443                         if (tp->pr_istats)
 444                                 intpr(tp->pr_istats);
 445                         else if (vflag)
 446                                 printf("%s: no per-interface stats routine\n",
 447                                     tp->pr_name);
 448                         return;
 449                 }
 450                 else {
 451                         pr = tp->pr_stats;
 452                         if (!pr) {
 453                                 if (pflag && vflag)
 454                                         printf("%s: no stats routine\n",
 455                                             tp->pr_name);
 456                                 return;
 457                         }
 458                         off = tp->pr_protocol;
 459                 }
 460         } else {
 461                 pr = tp->pr_cblocks;
 462                 if (!pr) {
 463                         if (pflag && vflag)
 464                                 printf("%s: no PCB routine\n", tp->pr_name);
 465                         return;
 466                 }
 467                 off = tp->pr_protocol;
 468         }
 469         if (pr != NULL) {
 470                 if (sflag && iflag && pflag)
 471                         intervalpr(pr, off, name, af);
 472                 else
 473                         (*pr)(off, name, af);
 474         } else {
 475                 printf("### no stats for %s\n", name);
 476         }
 477 }
 478
 479 char *
 480 plural(int n)
 481 {
 482         return (n != 1 ? "s" : "");
 483 }
 484
 485 char *
 486 plurales(int n)
 487 {
 488         return (n != 1 ? "es" : "");
 489 }
 490
 491 char *
 492 pluralies(int n)
 493 {
 494         return (n != 1 ? "ies" : "y");
 495 }
 496
 497 /*
 498  * Find the protox for the given "well-known" name.
 499  */
 500 static struct protox *
 501 knownname(char *name)
 502 {
 503         struct protox **tpp, *tp;
 504
 505         for (tpp = protoprotox; *tpp; tpp++)
 506                 for (tp = *tpp; tp->pr_name; tp++)
 507                         if (strcmp(tp->pr_name, name) == 0)
 508                                 return (tp);
 509         return (NULL);
 510 }
 511
 512 /*
 513  * Find the protox corresponding to name.
 514  */
 515 static struct protox *
 516 name2protox(char *name)
 517 {
 518         struct protox *tp;
 519         char **alias;                   /* alias from p->aliases */
 520         struct protoent *p;
 521
 522         /*
 523          * Try to find the name in the list of "well-known" names. If that
 524          * fails, check if name is an alias for an Internet protocol.
 525          */
 526         if ((tp = knownname(name)) != NULL)
 527                 return (tp);
 528
 529         setprotoent(1);                 /* make protocol lookup cheaper */
 530         while ((p = getprotoent()) != NULL) {
 531                 /* assert: name not same as p->name */
 532                 for (alias = p->p_aliases; *alias; alias++)
 533                         if (strcmp(name, *alias) == 0) {
 534                                 endprotoent();
 535                                 return (knownname(p->p_name));
 536                         }
 537         }
 538         endprotoent();
 539         return (NULL);
 540 }
 541
 542 #define NETSTAT_USAGE "\
 543 Usage:  netstat [-AaLlnW] [-f address_family | -p protocol]\n\
 544         netstat [-gilns] [-f address_family]\n\
 545         netstat -i | -I interface [-w wait] [-abdgRt]\n\
 546         netstat -s [-s] [-f address_family | -p protocol] [-w wait]\n\
 547         netstat -i | -I interface -s [-f address_family | -p protocol]\n\
 548         netstat -m [-m]\n\
 549         netstat -r [-Aaln] [-f address_family]\n\
 550         netstat -rs [-s]\n\
 551 "
 552
 553 static void
 554 usage(void)
 555 {
 556         (void) fprintf(stderr, "%s\n", NETSTAT_USAGE);
 557         exit(1);
 558 }
 559
 560 int
 561 print_time(void)
 562 {
 563     time_t now;
 564     struct tm tm;
 565     int num_written = 0;
 566
 567     (void) time(&now);
 568     (void) localtime_r(&now, &tm);
 569
 570     num_written += printf("%02d:%02d:%02d ", tm.tm_hour, tm.tm_min, tm.tm_sec);
 571
 572     return (num_written);
 573 }
 574