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 struct protox kernprotox[] = {
 170         { NULL,         print_net_api_stats,    NULL,   "net_api", 0 },
 171         { NULL,         NULL,           NULL,   NULL,   0 }
 172 };
 173
 174 struct protox *protoprotox[] = {
 175         protox,
 176 #ifdef INET6
 177         ip6protox,
 178 #endif
 179 #ifdef IPSEC
 180         pfkeyprotox,
 181 #endif
 182         systmprotox,
 183         nstatprotox,
 184         ipcprotox,
 185         kernprotox,
 186         NULL
 187 };
 188
 189 static void printproto (struct protox *, char *);
 190 static void usage (void);
 191 static struct protox *name2protox (char *);
 192 static struct protox *knownname (char *);
 193 #ifdef SRVCACHE
 194 extern void _serv_cache_close();
 195 #endif
 196
 197 int     Aflag;          /* show addresses of protocol control block */
 198 int     aflag;          /* show all sockets (including servers) */
 199 int     bflag;          /* show i/f total bytes in/out */
 200 int     cflag;          /* show specific classq */
 201 int     dflag;          /* show i/f dropped packets */
 202 int     Fflag;          /* show i/f forwarded packets */
 203 #if defined(__APPLE__)
 204 int     gflag;          /* show group (multicast) routing or stats */
 205 #endif
 206 int     iflag;          /* show interfaces */
 207 int     lflag;          /* show routing table with use and ref */
 208 int     Lflag;          /* show size of listen queues */
 209 int     mflag;          /* show memory stats */
 210 int     nflag;          /* show addresses numerically */
 211 static int pflag;       /* show given protocol */
 212 int     prioflag = -1;  /* show packet priority statistics */
 213 int     Rflag;          /* show reachability information */
 214 int     rflag;          /* show routing tables (or routing stats) */
 215 int     sflag;          /* show protocol statistics */
 216 int     Sflag;          /* show additional i/f link status */
 217 int     tflag;          /* show i/f watchdog timers */
 218 int     vflag;          /* more verbose */
 219 int     Wflag;          /* wide display */
 220 int     qflag;          /* classq stats display */
 221 int     Qflag;          /* opportunistic polling stats display */
 222 int     xflag;          /* show extended link-layer reachability information */
 223
 224 int     cq = -1;        /* send classq index (-1 for all) */
 225 int     interval;       /* repeat interval for i/f stats */
 226
 227 char    *interface;     /* desired i/f for stats, or NULL for all i/fs */
 228 int     unit;           /* unit number for above */
 229
 230 int     af;             /* address family */
 231
 232 int
 233 main(argc, argv)
 234         int argc;
 235         char *argv[];
 236 {
 237         register struct protox *tp = NULL;  /* for printing cblocks & stats */
 238         int ch;
 239
 240         af = AF_UNSPEC;
 241
 242         while ((ch = getopt(argc, argv, "Aabc:dFf:gI:ikLlmnP:p:qQrRsStuvWw:x")) != -1)
 243                 switch(ch) {
 244                 case 'A':
 245                         Aflag = 1;
 246                         break;
 247                 case 'a':
 248                         aflag = 1;
 249                         break;
 250                 case 'b':
 251                         bflag = 1;
 252                         break;
 253                 case 'c':
 254                         cflag = 1;
 255                         cq = atoi(optarg);
 256                         break;
 257                 case 'd':
 258                         dflag = 1;
 259                         break;
 260                 case 'F':
 261                         Fflag = 1;
 262                         break;
 263                 case 'f':
 264                         if (strcmp(optarg, "ipx") == 0)
 265                                 af = AF_IPX;
 266                         else if (strcmp(optarg, "inet") == 0)
 267                                 af = AF_INET;
 268 #ifdef INET6
 269                         else if (strcmp(optarg, "inet6") == 0)
 270                                 af = AF_INET6;
 271 #endif /*INET6*/
 272 #ifdef INET6
 273                         else if (strcmp(optarg, "pfkey") == 0)
 274                                 af = PF_KEY;
 275 #endif /*INET6*/
 276                         else if (strcmp(optarg, "unix") == 0)
 277                                 af = AF_UNIX;
 278                         else if (strcmp(optarg, "systm") == 0)
 279                                 af = AF_SYSTEM;
 280                         else {
 281                                 errx(1, "%s: unknown address family", optarg);
 282                         }
 283                         break;
 284 #if defined(__APPLE__)
 285                 case 'g':
 286                         gflag = 1;
 287                         break;
 288 #endif
 289                 case 'I': {
 290                         char *cp;
 291
 292                         iflag = 1;
 293                         for (cp = interface = optarg; isalpha(*cp); cp++)
 294                                 continue;
 295                         unit = atoi(cp);
 296                         break;
 297                 }
 298                 case 'i':
 299                         iflag = 1;
 300                         break;
 301                 case 'l':
 302                         lflag = 1;
 303                         break;
 304                 case 'L':
 305                         Lflag = 1;
 306                         break;
 307                 case 'm':
 308                         mflag++;
 309                         break;
 310                 case 'n':
 311                         nflag = 1;
 312                         break;
 313                 case 'P':
 314                         prioflag = atoi(optarg);
 315                         break;
 316                 case 'p':
 317                         if ((tp = name2protox(optarg)) == NULL) {
 318                                 errx(1,
 319                                      "%s: unknown or uninstrumented protocol",
 320                                      optarg);
 321                         }
 322                         pflag = 1;
 323                         break;
 324                 case 'q':
 325                         qflag++;
 326                         break;
 327                 case 'Q':
 328                         Qflag++;
 329                         break;
 330                 case 'R':
 331                         Rflag = 1;
 332                         break;
 333                 case 'r':
 334                         rflag = 1;
 335                         break;
 336                 case 's':
 337                         ++sflag;
 338                         break;
 339                 case 'S':
 340                         Sflag = 1;
 341                         break;
 342                 case 't':
 343                         tflag = 1;
 344                         break;
 345                 case 'u':
 346                         af = AF_UNIX;
 347                         break;
 348                 case 'v':
 349                         vflag++;
 350                         break;
 351                 case 'W':
 352                         Wflag = 1;
 353                         break;
 354                 case 'w':
 355                         interval = atoi(optarg);
 356                         iflag = 1;
 357                         break;
 358                 case 'x':
 359                         xflag = 1;
 360                         Rflag = 1;
 361                         break;
 362                 case '?':
 363                 default:
 364                         usage();
 365                 }
 366         argv += optind;
 367         argc -= optind;
 368
 369 #define BACKWARD_COMPATIBILITY
 370 #ifdef  BACKWARD_COMPATIBILITY
 371         if (*argv) {
 372                 if (isdigit(**argv)) {
 373                         interval = atoi(*argv);
 374                         if (interval <= 0)
 375                                 usage();
 376                         ++argv;
 377                         iflag = 1;
 378                 }
 379         }
 380 #endif
 381
 382         if (mflag) {
 383                 mbpr();
 384                 exit(0);
 385         }
 386         if (iflag && !sflag && !Sflag && !gflag && !qflag && !Qflag) {
 387                 if (Rflag)
 388                         intpr_ri(NULL);
 389                 else
 390                         intpr(NULL);
 391                 exit(0);
 392         }
 393         if (rflag) {
 394                 if (sflag)
 395                         rt_stats();
 396                 else
 397                         routepr();
 398                 exit(0);
 399         }
 400         if (qflag || Qflag) {
 401                 if (interface == NULL) {
 402                         fprintf(stderr, "%s statistics option "
 403                             "requires interface name\n", qflag ? "Queue" :
 404                             "Polling");
 405                 } else if (qflag) {
 406                         aqstatpr();
 407                 } else {
 408                         rxpollstatpr();
 409                 }
 410                 exit(0);
 411         }
 412         if (Sflag) {
 413                 if (interface == NULL) {
 414                         fprintf(stderr, "additional link status option"
 415                                 " requires interface name\n");
 416                 } else {
 417                         print_link_status(interface);
 418                 }
 419                 exit(0);
 420         }
 421
 422 #if defined(__APPLE__)
 423         if (gflag) {
 424                 ifmalist_dump();
 425                 exit(0);
 426         }
 427 #endif
 428
 429         if (tp) {
 430                 printproto(tp, tp->pr_name);
 431                 exit(0);
 432         }
 433         if (af == AF_INET || af == AF_UNSPEC)
 434                 for (tp = protox; tp->pr_name; tp++)
 435                         printproto(tp, tp->pr_name);
 436 #ifdef INET6
 437         if (af == AF_INET6 || af == AF_UNSPEC)
 438                 for (tp = ip6protox; tp->pr_name; tp++)
 439                         printproto(tp, tp->pr_name);
 440 #endif /*INET6*/
 441 #ifdef IPSEC
 442         if (af == PF_KEY || af == AF_UNSPEC)
 443                 for (tp = pfkeyprotox; tp->pr_name; tp++)
 444                         printproto(tp, tp->pr_name);
 445 #endif /*IPSEC*/
 446         if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag)
 447                 unixpr();
 448
 449         if ((af == AF_SYSTEM || af == AF_UNSPEC) && !Lflag)
 450                 for (tp = systmprotox; tp->pr_name; tp++)
 451                         printproto(tp, tp->pr_name);
 452 #if TARGET_OS_IPHONE
 453         if (af == AF_UNSPEC && !Lflag)
 454                 for (tp = nstatprotox; tp->pr_name; tp++)
 455                         printproto(tp, tp->pr_name);
 456 #endif /* TARGET_OS_IPHONE */
 457
 458         if (af == AF_UNSPEC && !Lflag)
 459                 for (tp = ipcprotox; tp->pr_name; tp++)
 460                         printproto(tp, tp->pr_name);
 461
 462         if (af == AF_UNSPEC && !Lflag)
 463                 for (tp = kernprotox; tp->pr_name; tp++)
 464                         printproto(tp, tp->pr_name);
 465
 466
 467 #ifdef SRVCACHE
 468         _serv_cache_close();
 469 #endif
 470         exit(0);
 471 }
 472
 473 /*
 474  * Print out protocol statistics or control blocks (per sflag).
 475  * If the interface was not specifically requested, and the symbol
 476  * is not in the namelist, ignore this one.
 477  */
 478 static void
 479 printproto(tp, name)
 480         register struct protox *tp;
 481         char *name;
 482 {
 483         void (*pr)(uint32_t, char *, int);
 484         uint32_t off;
 485
 486         if (sflag) {
 487                 if (iflag && !pflag) {
 488                         if (tp->pr_istats)
 489                                 intpr(tp->pr_istats);
 490                         else if (vflag)
 491                                 printf("%s: no per-interface stats routine\n",
 492                                     tp->pr_name);
 493                         return;
 494                 }
 495                 else {
 496                         pr = tp->pr_stats;
 497                         if (!pr) {
 498                                 if (pflag && vflag)
 499                                         printf("%s: no stats routine\n",
 500                                             tp->pr_name);
 501                                 return;
 502                         }
 503                         off = tp->pr_protocol;
 504                 }
 505         } else {
 506                 pr = tp->pr_cblocks;
 507                 if (!pr) {
 508                         if (pflag && vflag)
 509                                 printf("%s: no PCB routine\n", tp->pr_name);
 510                         return;
 511                 }
 512                 off = tp->pr_protocol;
 513         }
 514         if (pr != NULL) {
 515                 if (sflag && iflag && pflag)
 516                         intervalpr(pr, off, name, af);
 517                 else
 518                         (*pr)(off, name, af);
 519         } else {
 520                 printf("### no stats for %s\n", name);
 521         }
 522 }
 523
 524 char *
 525 plural(int n)
 526 {
 527         return (n > 1 ? "s" : "");
 528 }
 529
 530 char *
 531 plurales(int n)
 532 {
 533         return (n > 1 ? "es" : "");
 534 }
 535
 536 char *
 537 pluralies(int n)
 538 {
 539         return (n > 1 ? "ies" : "y");
 540 }
 541
 542 /*
 543  * Find the protox for the given "well-known" name.
 544  */
 545 static struct protox *
 546 knownname(char *name)
 547 {
 548         struct protox **tpp, *tp;
 549
 550         for (tpp = protoprotox; *tpp; tpp++)
 551                 for (tp = *tpp; tp->pr_name; tp++)
 552                         if (strcmp(tp->pr_name, name) == 0)
 553                                 return (tp);
 554         return (NULL);
 555 }
 556
 557 /*
 558  * Find the protox corresponding to name.
 559  */
 560 static struct protox *
 561 name2protox(char *name)
 562 {
 563         struct protox *tp;
 564         char **alias;                   /* alias from p->aliases */
 565         struct protoent *p;
 566
 567         /*
 568          * Try to find the name in the list of "well-known" names. If that
 569          * fails, check if name is an alias for an Internet protocol.
 570          */
 571         if ((tp = knownname(name)) != NULL)
 572                 return (tp);
 573
 574         setprotoent(1);                 /* make protocol lookup cheaper */
 575         while ((p = getprotoent()) != NULL) {
 576                 /* assert: name not same as p->name */
 577                 for (alias = p->p_aliases; *alias; alias++)
 578                         if (strcmp(name, *alias) == 0) {
 579                                 endprotoent();
 580                                 return (knownname(p->p_name));
 581                         }
 582         }
 583         endprotoent();
 584         return (NULL);
 585 }
 586
 587 #define NETSTAT_USAGE "\
 588 Usage:  netstat [-AaLlnW] [-f address_family | -p protocol]\n\
 589         netstat [-gilns] [-f address_family]\n\
 590         netstat -i | -I interface [-w wait] [-abdgRtS]\n\
 591         netstat -s [-s] [-f address_family | -p protocol] [-w wait]\n\
 592         netstat -i | -I interface -s [-f address_family | -p protocol]\n\
 593         netstat -m [-m]\n\
 594         netstat -r [-Aaln] [-f address_family]\n\
 595         netstat -rs [-s]\n\
 596 "
 597
 598 static void
 599 usage(void)
 600 {
 601         (void) fprintf(stderr, "%s\n", NETSTAT_USAGE);
 602         exit(1);
 603 }
 604
 605 int
 606 print_time(void)
 607 {
 608     time_t now;
 609     struct tm tm;
 610     int num_written = 0;
 611
 612     (void) time(&now);
 613     (void) localtime_r(&now, &tm);
 614
 615     num_written += printf("%02d:%02d:%02d ", tm.tm_hour, tm.tm_min, tm.tm_sec);
 616
 617     return (num_written);
 618 }
 619