netstat.tproj/main.c

   1 /*
   2  * Copyright (c) 2008-2015 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 nstatprotox[] = {
 160         { NULL,         print_nstat_stats,      NULL,   "nstat", 0 },
 161         { NULL,         NULL,           NULL,   NULL,   0 }
 162 };
 163
 164 struct protox ipcprotox[] = {
 165         { NULL,         print_extbkidle_stats,  NULL,   "xbkidle", 0 },
 166         { NULL,         NULL,           NULL,   NULL,   0 }
 167 };
 168
 169
 170 struct protox *protoprotox[] = {
 171         protox,
 172 #ifdef INET6
 173         ip6protox,
 174 #endif
 175 #ifdef IPSEC
 176         pfkeyprotox,
 177 #endif
 178         systmprotox,
 179         nstatprotox,
 180         ipcprotox,
 181         NULL
 182 };
 183
 184 static void printproto (struct protox *, char *);
 185 static void usage (void);
 186 static struct protox *name2protox (char *);
 187 static struct protox *knownname (char *);
 188 #ifdef SRVCACHE
 189 extern void _serv_cache_close();
 190 #endif
 191
 192 int     Aflag;          /* show addresses of protocol control block */
 193 int     aflag;          /* show all sockets (including servers) */
 194 int     bflag;          /* show i/f total bytes in/out */
 195 int     cflag;          /* show specific classq */
 196 int     dflag;          /* show i/f dropped packets */
 197 int     Fflag;          /* show i/f forwarded packets */
 198 #if defined(__APPLE__)
 199 int     gflag;          /* show group (multicast) routing or stats */
 200 #endif
 201 int     iflag;          /* show interfaces */
 202 int     lflag;          /* show routing table with use and ref */
 203 int     Lflag;          /* show size of listen queues */
 204 int     mflag;          /* show memory stats */
 205 int     nflag;          /* show addresses numerically */
 206 static int pflag;       /* show given protocol */
 207 int     prioflag = -1;  /* show packet priority statistics */
 208 int     Rflag;          /* show reachability information */
 209 int     rflag;          /* show routing tables (or routing stats) */
 210 int     sflag;          /* show protocol statistics */
 211 int     Sflag;          /* show additional i/f link status */
 212 int     tflag;          /* show i/f watchdog timers */
 213 int     vflag;          /* more verbose */
 214 int     Wflag;          /* wide display */
 215 int     qflag;          /* classq stats display */
 216 int     Qflag;          /* opportunistic polling stats display */
 217 int     xflag;          /* show extended link-layer reachability information */
 218
 219 int     cq = -1;        /* send classq index (-1 for all) */
 220 int     interval;       /* repeat interval for i/f stats */
 221
 222 char    *interface;     /* desired i/f for stats, or NULL for all i/fs */
 223 int     unit;           /* unit number for above */
 224
 225 int     af;             /* address family */
 226
 227 int
 228 main(argc, argv)
 229         int argc;
 230         char *argv[];
 231 {
 232         register struct protox *tp = NULL;  /* for printing cblocks & stats */
 233         int ch;
 234
 235         af = AF_UNSPEC;
 236
 237         while ((ch = getopt(argc, argv, "Aabc:dFf:gI:ikLlmnP:p:qQrRsStuvWw:x")) != -1)
 238                 switch(ch) {
 239                 case 'A':
 240                         Aflag = 1;
 241                         break;
 242                 case 'a':
 243                         aflag = 1;
 244                         break;
 245                 case 'b':
 246                         bflag = 1;
 247                         break;
 248                 case 'c':
 249                         cflag = 1;
 250                         cq = atoi(optarg);
 251                         break;
 252                 case 'd':
 253                         dflag = 1;
 254                         break;
 255                 case 'F':
 256                         Fflag = 1;
 257                         break;
 258                 case 'f':
 259                         if (strcmp(optarg, "ipx") == 0)
 260                                 af = AF_IPX;
 261                         else if (strcmp(optarg, "inet") == 0)
 262                                 af = AF_INET;
 263 #ifdef INET6
 264                         else if (strcmp(optarg, "inet6") == 0)
 265                                 af = AF_INET6;
 266 #endif /*INET6*/
 267 #ifdef INET6
 268                         else if (strcmp(optarg, "pfkey") == 0)
 269                                 af = PF_KEY;
 270 #endif /*INET6*/
 271                         else if (strcmp(optarg, "unix") == 0)
 272                                 af = AF_UNIX;
 273                         else if (strcmp(optarg, "systm") == 0)
 274                                 af = AF_SYSTEM;
 275                         else {
 276                                 errx(1, "%s: unknown address family", optarg);
 277                         }
 278                         break;
 279 #if defined(__APPLE__)
 280                 case 'g':
 281                         gflag = 1;
 282                         break;
 283 #endif
 284                 case 'I': {
 285                         char *cp;
 286
 287                         iflag = 1;
 288                         for (cp = interface = optarg; isalpha(*cp); cp++)
 289                                 continue;
 290                         unit = atoi(cp);
 291                         break;
 292                 }
 293                 case 'i':
 294                         iflag = 1;
 295                         break;
 296                 case 'l':
 297                         lflag = 1;
 298                         break;
 299                 case 'L':
 300                         Lflag = 1;
 301                         break;
 302                 case 'm':
 303                         mflag++;
 304                         break;
 305                 case 'n':
 306                         nflag = 1;
 307                         break;
 308                 case 'P':
 309                         prioflag = atoi(optarg);
 310                         break;
 311                 case 'p':
 312                         if ((tp = name2protox(optarg)) == NULL) {
 313                                 errx(1,
 314                                      "%s: unknown or uninstrumented protocol",
 315                                      optarg);
 316                         }
 317                         pflag = 1;
 318                         break;
 319                 case 'q':
 320                         qflag++;
 321                         break;
 322                 case 'Q':
 323                         Qflag++;
 324                         break;
 325                 case 'R':
 326                         Rflag = 1;
 327                         break;
 328                 case 'r':
 329                         rflag = 1;
 330                         break;
 331                 case 's':
 332                         ++sflag;
 333                         break;
 334                 case 'S':
 335                         Sflag = 1;
 336                         break;
 337                 case 't':
 338                         tflag = 1;
 339                         break;
 340                 case 'u':
 341                         af = AF_UNIX;
 342                         break;
 343                 case 'v':
 344                         vflag++;
 345                         break;
 346                 case 'W':
 347                         Wflag = 1;
 348                         break;
 349                 case 'w':
 350                         interval = atoi(optarg);
 351                         iflag = 1;
 352                         break;
 353                 case 'x':
 354                         xflag = 1;
 355                         Rflag = 1;
 356                         break;
 357                 case '?':
 358                 default:
 359                         usage();
 360                 }
 361         argv += optind;
 362         argc -= optind;
 363
 364 #define BACKWARD_COMPATIBILITY
 365 #ifdef  BACKWARD_COMPATIBILITY
 366         if (*argv) {
 367                 if (isdigit(**argv)) {
 368                         interval = atoi(*argv);
 369                         if (interval <= 0)
 370                                 usage();
 371                         ++argv;
 372                         iflag = 1;
 373                 }
 374         }
 375 #endif
 376
 377         if (mflag) {
 378                 mbpr();
 379                 exit(0);
 380         }
 381         if (iflag && !sflag && !Sflag && !gflag && !qflag && !Qflag) {
 382                 if (Rflag)
 383                         intpr_ri(NULL);
 384                 else
 385                         intpr(NULL);
 386                 exit(0);
 387         }
 388         if (rflag) {
 389                 if (sflag)
 390                         rt_stats();
 391                 else
 392                         routepr();
 393                 exit(0);
 394         }
 395         if (qflag || Qflag) {
 396                 if (interface == NULL) {
 397                         fprintf(stderr, "%s statistics option "
 398                             "requires interface name\n", qflag ? "Queue" :
 399                             "Polling");
 400                 } else if (qflag) {
 401                         aqstatpr();
 402                 } else {
 403                         rxpollstatpr();
 404                 }
 405                 exit(0);
 406         }
 407         if (Sflag) {
 408                 if (interface == NULL) {
 409                         fprintf(stderr, "additional link status option"
 410                                 " requires interface name\n");
 411                 } else {
 412                         print_link_status(interface);
 413                 }
 414                 exit(0);
 415         }
 416
 417 #if defined(__APPLE__)
 418         if (gflag) {
 419                 ifmalist_dump();
 420                 exit(0);
 421         }
 422 #endif
 423
 424         if (tp) {
 425                 printproto(tp, tp->pr_name);
 426                 exit(0);
 427         }
 428         if (af == AF_INET || af == AF_UNSPEC)
 429                 for (tp = protox; tp->pr_name; tp++)
 430                         printproto(tp, tp->pr_name);
 431 #ifdef INET6
 432         if (af == AF_INET6 || af == AF_UNSPEC)
 433                 for (tp = ip6protox; tp->pr_name; tp++)
 434                         printproto(tp, tp->pr_name);
 435 #endif /*INET6*/
 436 #ifdef IPSEC
 437         if (af == PF_KEY || af == AF_UNSPEC)
 438                 for (tp = pfkeyprotox; tp->pr_name; tp++)
 439                         printproto(tp, tp->pr_name);
 440 #endif /*IPSEC*/
 441         if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag)
 442                 unixpr();
 443
 444         if ((af == AF_SYSTEM || af == AF_UNSPEC) && !Lflag)
 445                 for (tp = systmprotox; tp->pr_name; tp++)
 446                         printproto(tp, tp->pr_name);
 447 #if TARGET_OS_IPHONE
 448         if (af == AF_UNSPEC && !Lflag)
 449                 for (tp = nstatprotox; tp->pr_name; tp++)
 450                         printproto(tp, tp->pr_name);
 451 #endif /* TARGET_OS_IPHONE */
 452
 453         if (af == AF_UNSPEC && !Lflag)
 454                 for (tp = ipcprotox; tp->pr_name; tp++)
 455                         printproto(tp, tp->pr_name);
 456
 457 #ifdef SRVCACHE
 458         _serv_cache_close();
 459 #endif
 460         exit(0);
 461 }
 462
 463 /*
 464  * Print out protocol statistics or control blocks (per sflag).
 465  * If the interface was not specifically requested, and the symbol
 466  * is not in the namelist, ignore this one.
 467  */
 468 static void
 469 printproto(tp, name)
 470         register struct protox *tp;
 471         char *name;
 472 {
 473         void (*pr)(uint32_t, char *, int);
 474         uint32_t off;
 475
 476         if (sflag) {
 477                 if (iflag && !pflag) {
 478                         if (tp->pr_istats)
 479                                 intpr(tp->pr_istats);
 480                         else if (vflag)
 481                                 printf("%s: no per-interface stats routine\n",
 482                                     tp->pr_name);
 483                         return;
 484                 }
 485                 else {
 486                         pr = tp->pr_stats;
 487                         if (!pr) {
 488                                 if (pflag && vflag)
 489                                         printf("%s: no stats routine\n",
 490                                             tp->pr_name);
 491                                 return;
 492                         }
 493                         off = tp->pr_protocol;
 494                 }
 495         } else {
 496                 pr = tp->pr_cblocks;
 497                 if (!pr) {
 498                         if (pflag && vflag)
 499                                 printf("%s: no PCB routine\n", tp->pr_name);
 500                         return;
 501                 }
 502                 off = tp->pr_protocol;
 503         }
 504         if (pr != NULL) {
 505                 if (sflag && iflag && pflag)
 506                         intervalpr(pr, off, name, af);
 507                 else
 508                         (*pr)(off, name, af);
 509         } else {
 510                 printf("### no stats for %s\n", name);
 511         }
 512 }
 513
 514 char *
 515 plural(int n)
 516 {
 517         return (n > 1 ? "s" : "");
 518 }
 519
 520 char *
 521 plurales(int n)
 522 {
 523         return (n > 1 ? "es" : "");
 524 }
 525
 526 char *
 527 pluralies(int n)
 528 {
 529         return (n > 1 ? "ies" : "y");
 530 }
 531
 532 /*
 533  * Find the protox for the given "well-known" name.
 534  */
 535 static struct protox *
 536 knownname(char *name)
 537 {
 538         struct protox **tpp, *tp;
 539
 540         for (tpp = protoprotox; *tpp; tpp++)
 541                 for (tp = *tpp; tp->pr_name; tp++)
 542                         if (strcmp(tp->pr_name, name) == 0)
 543                                 return (tp);
 544         return (NULL);
 545 }
 546
 547 /*
 548  * Find the protox corresponding to name.
 549  */
 550 static struct protox *
 551 name2protox(char *name)
 552 {
 553         struct protox *tp;
 554         char **alias;                   /* alias from p->aliases */
 555         struct protoent *p;
 556
 557         /*
 558          * Try to find the name in the list of "well-known" names. If that
 559          * fails, check if name is an alias for an Internet protocol.
 560          */
 561         if ((tp = knownname(name)) != NULL)
 562                 return (tp);
 563
 564         setprotoent(1);                 /* make protocol lookup cheaper */
 565         while ((p = getprotoent()) != NULL) {
 566                 /* assert: name not same as p->name */
 567                 for (alias = p->p_aliases; *alias; alias++)
 568                         if (strcmp(name, *alias) == 0) {
 569                                 endprotoent();
 570                                 return (knownname(p->p_name));
 571                         }
 572         }
 573         endprotoent();
 574         return (NULL);
 575 }
 576
 577 #define NETSTAT_USAGE "\
 578 Usage:  netstat [-AaLlnW] [-f address_family | -p protocol]\n\
 579         netstat [-gilns] [-f address_family]\n\
 580         netstat -i | -I interface [-w wait] [-abdgRtS]\n\
 581         netstat -s [-s] [-f address_family | -p protocol] [-w wait]\n\
 582         netstat -i | -I interface -s [-f address_family | -p protocol]\n\
 583         netstat -m [-m]\n\
 584         netstat -r [-Aaln] [-f address_family]\n\
 585         netstat -rs [-s]\n\
 586 "
 587
 588 static void
 589 usage(void)
 590 {
 591         (void) fprintf(stderr, "%s\n", NETSTAT_USAGE);
 592         exit(1);
 593 }
 594
 595 int
 596 print_time(void)
 597 {
 598     time_t now;
 599     struct tm tm;
 600     int num_written = 0;
 601
 602     (void) time(&now);
 603     (void) localtime_r(&now, &tm);
 604
 605     num_written += printf("%02d:%02d:%02d ", tm.tm_hour, tm.tm_min, tm.tm_sec);
 606
 607     return (num_written);
 608 }
 609