main.c revision 149862
1/* 2 * Copyright (c) 1983, 1988, 1993 3 * Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#ifndef lint 35char const copyright[] = 36"@(#) Copyright (c) 1983, 1988, 1993\n\ 37 Regents of the University of California. All rights reserved.\n"; 38#endif /* not lint */ 39 40#if 0 41#ifndef lint 42static char sccsid[] = "@(#)main.c 8.4 (Berkeley) 3/1/94"; 43#endif /* not lint */ 44#endif 45 46#include <sys/cdefs.h> 47__FBSDID("$FreeBSD: head/usr.bin/netstat/main.c 149862 2005-09-07 17:35:16Z csjp $"); 48 49#include <sys/param.h> 50#include <sys/file.h> 51#include <sys/protosw.h> 52#include <sys/socket.h> 53 54#include <netinet/in.h> 55 56#include <netgraph/ng_socket.h> 57 58#include <ctype.h> 59#include <err.h> 60#include <errno.h> 61#include <kvm.h> 62#include <limits.h> 63#include <netdb.h> 64#include <nlist.h> 65#include <paths.h> 66#include <stdio.h> 67#include <stdlib.h> 68#include <string.h> 69#include <unistd.h> 70#include "netstat.h" 71 72static struct nlist nl[] = { 73#define N_IFNET 0 74 { "_ifnet" }, 75#define N_RTSTAT 1 76 { "_rtstat" }, 77#define N_RTREE 2 78 { "_rt_tables"}, 79#define N_MRTSTAT 3 80 { "_mrtstat" }, 81#define N_MFCTABLE 4 82 { "_mfctable" }, 83#define N_VIFTABLE 5 84 { "_viftable" }, 85#define N_IPX 6 86 { "_ipxpcb_list"}, 87#define N_IPXSTAT 7 88 { "_ipxstat"}, 89#define N_SPXSTAT 8 90 { "_spx_istat"}, 91#define N_DDPSTAT 9 92 { "_ddpstat"}, 93#define N_DDPCB 10 94 { "_ddpcb"}, 95#define N_NGSOCKS 11 96 { "_ngsocklist"}, 97#define N_IP6STAT 12 98 { "_ip6stat" }, 99#define N_ICMP6STAT 13 100 { "_icmp6stat" }, 101#define N_IPSECSTAT 14 102 { "_ipsecstat" }, 103#define N_IPSEC6STAT 15 104 { "_ipsec6stat" }, 105#define N_PIM6STAT 16 106 { "_pim6stat" }, 107#define N_MRT6STAT 17 108 { "_mrt6stat" }, 109#define N_MF6CTABLE 18 110 { "_mf6ctable" }, 111#define N_MIF6TABLE 19 112 { "_mif6table" }, 113#define N_PFKEYSTAT 20 114 { "_pfkeystat" }, 115#define N_MBSTAT 21 116 { "_mbstat" }, 117#define N_MBTYPES 22 118 { "_mbtypes" }, 119#define N_NMBCLUSTERS 23 120 { "_nmbclusters" }, 121#define N_NMBUFS 24 122 { "_nmbufs" }, 123#define N_MBHI 25 124 { "_mbuf_hiwm" }, 125#define N_CLHI 26 126 { "_clust_hiwm" }, 127#define N_NCPUS 27 128 { "_smp_cpus" }, 129#define N_PAGESZ 28 130 { "_pagesize" }, 131#define N_MBPSTAT 29 132 { "_mb_statpcpu" }, 133#define N_RTTRASH 30 134 { "_rttrash" }, 135#define N_MBLO 31 136 { "_mbuf_lowm" }, 137#define N_CLLO 32 138 { "_clust_lowm" }, 139#define N_CARPSTAT 33 140 { "_carpstats" }, 141#define N_PFSYNCSTAT 34 142 { "_pfsyncstats" }, 143 { "" }, 144}; 145 146struct protox { 147 u_char pr_index; /* index into nlist of cb head */ 148 u_char pr_sindex; /* index into nlist of stat block */ 149 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 150 void (*pr_cblocks)(u_long, const char *, int); 151 /* control blocks printing routine */ 152 void (*pr_stats)(u_long, const char *, int); 153 /* statistics printing routine */ 154 void (*pr_istats)(char *); /* per/if statistics printing routine */ 155 const char *pr_name; /* well-known name */ 156 u_long pr_usesysctl; /* non-zero if we use sysctl, not kvm */ 157} protox[] = { 158 { -1, -1, 1, protopr, 159 tcp_stats, NULL, "tcp", IPPROTO_TCP }, 160 { -1, -1, 1, protopr, 161 udp_stats, NULL, "udp", IPPROTO_UDP }, 162 { -1, -1, 1, protopr, 163 NULL, NULL, "divert",IPPROTO_DIVERT }, 164 { -1, -1, 1, protopr, 165 ip_stats, NULL, "ip", IPPROTO_RAW }, 166 { -1, -1, 1, protopr, 167 icmp_stats, NULL, "icmp", IPPROTO_ICMP }, 168 { -1, -1, 1, protopr, 169 igmp_stats, NULL, "igmp", IPPROTO_IGMP }, 170#ifdef IPSEC 171 { -1, N_IPSECSTAT, 1, NULL, 172 ipsec_stats, NULL, "ipsec", 0}, 173#endif 174 { -1, -1, 1, NULL, 175 bdg_stats, NULL, "bdg", 1 /* bridging... */ }, 176 { -1, -1, 1, protopr, 177 pim_stats, NULL, "pim", IPPROTO_PIM }, 178 { -1, N_CARPSTAT, 1, 0, 179 carp_stats, NULL, "carp", 0}, 180 { -1, -1, 1, NULL, 181 pfsync_stats, NULL, "pfsync", 1}, 182 { -1, -1, 0, NULL, 183 NULL, NULL, NULL, 0 } 184}; 185 186#ifdef INET6 187struct protox ip6protox[] = { 188 { -1, -1, 1, protopr, 189 tcp_stats, NULL, "tcp", IPPROTO_TCP }, 190 { -1, -1, 1, protopr, 191 udp_stats, NULL, "udp", IPPROTO_UDP }, 192 { -1, N_IP6STAT, 1, protopr, 193 ip6_stats, ip6_ifstats, "ip6", IPPROTO_RAW }, 194 { -1, N_ICMP6STAT, 1, protopr, 195 icmp6_stats, icmp6_ifstats, "icmp6",IPPROTO_ICMPV6 }, 196#ifdef IPSEC 197 { -1, N_IPSEC6STAT, 1, NULL, 198 ipsec_stats, NULL, "ipsec6",0 }, 199#endif 200#ifdef notyet 201 { -1, N_PIM6STAT, 1, NULL, 202 pim6_stats, NULL, "pim6", 0 }, 203#endif 204 { -1, -1, 1, NULL, 205 rip6_stats, NULL, "rip6", 0 }, 206 { -1, -1, 1, NULL, 207 bdg_stats, NULL, "bdg", 1 /* bridging... */ }, 208 { -1, -1, 0, NULL, 209 NULL, NULL, NULL, 0 } 210}; 211#endif /*INET6*/ 212 213#ifdef IPSEC 214struct protox pfkeyprotox[] = { 215 { -1, N_PFKEYSTAT, 1, NULL, 216 pfkey_stats, NULL, "pfkey", 0 }, 217 { -1, -1, 0, NULL, 218 NULL, NULL, NULL, 0 } 219}; 220#endif 221 222struct protox atalkprotox[] = { 223 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, 224 ddp_stats, NULL, "ddp", 0 }, 225 { -1, -1, 0, NULL, 226 NULL, NULL, NULL, 0 } 227}; 228 229struct protox netgraphprotox[] = { 230 { N_NGSOCKS, -1, 1, netgraphprotopr, 231 NULL, NULL, "ctrl", 0 }, 232 { N_NGSOCKS, -1, 1, netgraphprotopr, 233 NULL, NULL, "data", 0 }, 234 { -1, -1, 0, NULL, 235 NULL, NULL, NULL, 0 } 236}; 237 238#ifdef IPX 239struct protox ipxprotox[] = { 240 { N_IPX, N_IPXSTAT, 1, ipxprotopr, 241 ipx_stats, NULL, "ipx", 0 }, 242 { N_IPX, N_SPXSTAT, 1, ipxprotopr, 243 spx_stats, NULL, "spx", 0 }, 244 { -1, -1, 0, NULL, 245 NULL, NULL, 0, 0 } 246}; 247#endif 248 249struct protox *protoprotox[] = { 250 protox, 251#ifdef INET6 252 ip6protox, 253#endif 254#ifdef IPSEC 255 pfkeyprotox, 256#endif 257#ifdef IPX 258 ipxprotox, 259#endif 260 atalkprotox, NULL }; 261 262const char *pluralies(int); 263static void printproto(struct protox *, const char *); 264static void usage(void); 265static struct protox *name2protox(char *); 266static struct protox *knownname(char *); 267 268static kvm_t *kvmd; 269static char *nlistf = NULL, *memf = NULL; 270 271int Aflag; /* show addresses of protocol control block */ 272int aflag; /* show all sockets (including servers) */ 273int Bflag; /* show information about bpf consumers */ 274int bflag; /* show i/f total bytes in/out */ 275int dflag; /* show i/f dropped packets */ 276int gflag; /* show group (multicast) routing or stats */ 277int hflag; /* show counters in human readable format */ 278int iflag; /* show interfaces */ 279int Lflag; /* show size of listen queues */ 280int mflag; /* show memory stats */ 281int numeric_addr; /* show addresses numerically */ 282int numeric_port; /* show ports numerically */ 283static int pflag; /* show given protocol */ 284int rflag; /* show routing tables (or routing stats) */ 285int sflag; /* show protocol statistics */ 286int tflag; /* show i/f watchdog timers */ 287int Wflag; /* wide display */ 288int zflag; /* zero stats */ 289 290int interval; /* repeat interval for i/f stats */ 291 292char *interface; /* desired i/f for stats, or NULL for all i/fs */ 293int unit; /* unit number for above */ 294 295int af; /* address family */ 296 297int 298main(int argc, char *argv[]) 299{ 300 struct protox *tp = NULL; /* for printing cblocks & stats */ 301 int ch; 302 303 af = AF_UNSPEC; 304 305 while ((ch = getopt(argc, argv, "AaBbdf:ghI:iLlM:mN:np:rSstuWw:z")) != -1) 306 switch(ch) { 307 case 'A': 308 Aflag = 1; 309 break; 310 case 'a': 311 aflag = 1; 312 break; 313 case 'B': 314 Bflag = 1; 315 break; 316 case 'b': 317 bflag = 1; 318 break; 319 case 'd': 320 dflag = 1; 321 break; 322 case 'f': 323 if (strcmp(optarg, "ipx") == 0) 324 af = AF_IPX; 325 else if (strcmp(optarg, "inet") == 0) 326 af = AF_INET; 327#ifdef INET6 328 else if (strcmp(optarg, "inet6") == 0) 329 af = AF_INET6; 330#endif /*INET6*/ 331#ifdef INET6 332 else if (strcmp(optarg, "pfkey") == 0) 333 af = PF_KEY; 334#endif /*INET6*/ 335 else if (strcmp(optarg, "unix") == 0) 336 af = AF_UNIX; 337 else if (strcmp(optarg, "atalk") == 0) 338 af = AF_APPLETALK; 339 else if (strcmp(optarg, "ng") == 0 340 || strcmp(optarg, "netgraph") == 0) 341 af = AF_NETGRAPH; 342 else if (strcmp(optarg, "link") == 0) 343 af = AF_LINK; 344 else { 345 errx(1, "%s: unknown address family", optarg); 346 } 347 break; 348 case 'g': 349 gflag = 1; 350 break; 351 case 'h': 352 hflag = 1; 353 break; 354 case 'I': { 355 char *cp; 356 357 iflag = 1; 358 for (cp = interface = optarg; isalpha(*cp); cp++) 359 continue; 360 unit = atoi(cp); 361 break; 362 } 363 case 'i': 364 iflag = 1; 365 break; 366 case 'L': 367 Lflag = 1; 368 break; 369 case 'M': 370 memf = optarg; 371 break; 372 case 'm': 373 mflag = 1; 374 break; 375 case 'N': 376 nlistf = optarg; 377 break; 378 case 'n': 379 numeric_addr = numeric_port = 1; 380 break; 381 case 'p': 382 if ((tp = name2protox(optarg)) == NULL) { 383 errx(1, 384 "%s: unknown or uninstrumented protocol", 385 optarg); 386 } 387 pflag = 1; 388 break; 389 case 'r': 390 rflag = 1; 391 break; 392 case 's': 393 ++sflag; 394 break; 395 case 'S': 396 numeric_addr = 1; 397 break; 398 case 't': 399 tflag = 1; 400 break; 401 case 'u': 402 af = AF_UNIX; 403 break; 404 case 'W': 405 case 'l': 406 Wflag = 1; 407 break; 408 case 'w': 409 interval = atoi(optarg); 410 iflag = 1; 411 break; 412 case 'z': 413 zflag = 1; 414 break; 415 case '?': 416 default: 417 usage(); 418 } 419 argv += optind; 420 argc -= optind; 421 422#define BACKWARD_COMPATIBILITY 423#ifdef BACKWARD_COMPATIBILITY 424 if (*argv) { 425 if (isdigit(**argv)) { 426 interval = atoi(*argv); 427 if (interval <= 0) 428 usage(); 429 ++argv; 430 iflag = 1; 431 } 432 if (*argv) { 433 nlistf = *argv; 434 if (*++argv) 435 memf = *argv; 436 } 437 } 438#endif 439 440 /* 441 * Discard setgid privileges if not the running kernel so that bad 442 * guys can't print interesting stuff from kernel memory. 443 */ 444 if (nlistf != NULL || memf != NULL) 445 setgid(getgid()); 446 447 if (Bflag) { 448 bpf_stats(interface); 449 exit(0); 450 } 451 if (mflag) { 452 if (memf != NULL) { 453 if (kread(0, 0, 0) == 0) 454 mbpr(nl[N_MBSTAT].n_value, 455 nl[N_MBTYPES].n_value, 456 nl[N_NMBCLUSTERS].n_value, 457 nl[N_NMBUFS].n_value, 458 nl[N_MBHI].n_value, 459 nl[N_CLHI].n_value, 460 nl[N_MBLO].n_value, 461 nl[N_CLLO].n_value, 462 nl[N_NCPUS].n_value, 463 nl[N_PAGESZ].n_value, 464 nl[N_MBPSTAT].n_value); 465 } else 466 mbpr(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0); 467 exit(0); 468 } 469#if 0 470 /* 471 * Keep file descriptors open to avoid overhead 472 * of open/close on each call to get* routines. 473 */ 474 sethostent(1); 475 setnetent(1); 476#else 477 /* 478 * This does not make sense any more with DNS being default over 479 * the files. Doing a setXXXXent(1) causes a tcp connection to be 480 * used for the queries, which is slower. 481 */ 482#endif 483 if (iflag && !sflag) { 484 kread(0, 0, 0); 485 intpr(interval, nl[N_IFNET].n_value, NULL); 486 exit(0); 487 } 488 if (rflag) { 489 kread(0, 0, 0); 490 if (sflag) 491 rt_stats(nl[N_RTSTAT].n_value, nl[N_RTTRASH].n_value); 492 else 493 routepr(nl[N_RTREE].n_value); 494 exit(0); 495 } 496 if (gflag) { 497 kread(0, 0, 0); 498 if (sflag) { 499 if (af == AF_INET || af == AF_UNSPEC) 500 mrt_stats(nl[N_MRTSTAT].n_value); 501#ifdef INET6 502 if (af == AF_INET6 || af == AF_UNSPEC) 503 mrt6_stats(nl[N_MRT6STAT].n_value); 504#endif 505 } else { 506 if (af == AF_INET || af == AF_UNSPEC) 507 mroutepr(nl[N_MFCTABLE].n_value, 508 nl[N_VIFTABLE].n_value); 509#ifdef INET6 510 if (af == AF_INET6 || af == AF_UNSPEC) 511 mroute6pr(nl[N_MF6CTABLE].n_value, 512 nl[N_MIF6TABLE].n_value); 513#endif 514 } 515 ifmalist_dump(); 516 exit(0); 517 } 518 519 kread(0, 0, 0); 520 if (tp) { 521 printproto(tp, tp->pr_name); 522 exit(0); 523 } 524 if (af == AF_INET || af == AF_UNSPEC) 525 for (tp = protox; tp->pr_name; tp++) 526 printproto(tp, tp->pr_name); 527#ifdef INET6 528 if (af == AF_INET6 || af == AF_UNSPEC) 529 for (tp = ip6protox; tp->pr_name; tp++) 530 printproto(tp, tp->pr_name); 531#endif /*INET6*/ 532#ifdef IPSEC 533 if (af == PF_KEY || af == AF_UNSPEC) 534 for (tp = pfkeyprotox; tp->pr_name; tp++) 535 printproto(tp, tp->pr_name); 536#endif /*IPSEC*/ 537#ifdef IPX 538 if (af == AF_IPX || af == AF_UNSPEC) { 539 kread(0, 0, 0); 540 for (tp = ipxprotox; tp->pr_name; tp++) 541 printproto(tp, tp->pr_name); 542 } 543#endif /* IPX */ 544 if (af == AF_APPLETALK || af == AF_UNSPEC) 545 for (tp = atalkprotox; tp->pr_name; tp++) 546 printproto(tp, tp->pr_name); 547 if (af == AF_NETGRAPH || af == AF_UNSPEC) 548 for (tp = netgraphprotox; tp->pr_name; tp++) 549 printproto(tp, tp->pr_name); 550 if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag) 551 unixpr(); 552 exit(0); 553} 554 555/* 556 * Print out protocol statistics or control blocks (per sflag). 557 * If the interface was not specifically requested, and the symbol 558 * is not in the namelist, ignore this one. 559 */ 560static void 561printproto(tp, name) 562 struct protox *tp; 563 const char *name; 564{ 565 void (*pr)(u_long, const char *, int); 566 u_long off; 567 568 if (sflag) { 569 if (iflag) { 570 if (tp->pr_istats) 571 intpr(interval, nl[N_IFNET].n_value, 572 tp->pr_istats); 573 else if (pflag) 574 printf("%s: no per-interface stats routine\n", 575 tp->pr_name); 576 return; 577 } 578 else { 579 pr = tp->pr_stats; 580 if (!pr) { 581 if (pflag) 582 printf("%s: no stats routine\n", 583 tp->pr_name); 584 return; 585 } 586 off = tp->pr_usesysctl ? tp->pr_usesysctl 587 : nl[tp->pr_sindex].n_value; 588 } 589 } else { 590 pr = tp->pr_cblocks; 591 if (!pr) { 592 if (pflag) 593 printf("%s: no PCB routine\n", tp->pr_name); 594 return; 595 } 596 off = tp->pr_usesysctl ? tp->pr_usesysctl 597 : nl[tp->pr_index].n_value; 598 } 599 if (pr != NULL && (off || af != AF_UNSPEC)) 600 (*pr)(off, name, af); 601} 602 603/* 604 * Read kernel memory, return 0 on success. 605 */ 606int 607kread(u_long addr, char *buf, int size) 608{ 609 if (kvmd == 0) { 610 /* 611 * XXX. 612 */ 613 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf); 614 setgid(getgid()); 615 if (kvmd != NULL) { 616 if (kvm_nlist(kvmd, nl) < 0) { 617 if(nlistf) 618 errx(1, "%s: kvm_nlist: %s", nlistf, 619 kvm_geterr(kvmd)); 620 else 621 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd)); 622 } 623 624 if (nl[0].n_type == 0) { 625 if(nlistf) 626 errx(1, "%s: no namelist", nlistf); 627 else 628 errx(1, "no namelist"); 629 } 630 } else { 631 warnx("kvm not available"); 632 return(-1); 633 } 634 } 635 if (!buf) 636 return (0); 637 if (kvm_read(kvmd, addr, buf, size) != size) { 638 warnx("%s", kvm_geterr(kvmd)); 639 return (-1); 640 } 641 return (0); 642} 643 644const char * 645plural(int n) 646{ 647 return (n != 1 ? "s" : ""); 648} 649 650const char * 651plurales(int n) 652{ 653 return (n != 1 ? "es" : ""); 654} 655 656const char * 657pluralies(int n) 658{ 659 return (n != 1 ? "ies" : "y"); 660} 661 662/* 663 * Find the protox for the given "well-known" name. 664 */ 665static struct protox * 666knownname(char *name) 667{ 668 struct protox **tpp, *tp; 669 670 for (tpp = protoprotox; *tpp; tpp++) 671 for (tp = *tpp; tp->pr_name; tp++) 672 if (strcmp(tp->pr_name, name) == 0) 673 return (tp); 674 return (NULL); 675} 676 677/* 678 * Find the protox corresponding to name. 679 */ 680static struct protox * 681name2protox(char *name) 682{ 683 struct protox *tp; 684 char **alias; /* alias from p->aliases */ 685 struct protoent *p; 686 687 /* 688 * Try to find the name in the list of "well-known" names. If that 689 * fails, check if name is an alias for an Internet protocol. 690 */ 691 if ((tp = knownname(name)) != NULL) 692 return (tp); 693 694 setprotoent(1); /* make protocol lookup cheaper */ 695 while ((p = getprotoent()) != NULL) { 696 /* assert: name not same as p->name */ 697 for (alias = p->p_aliases; *alias; alias++) 698 if (strcmp(name, *alias) == 0) { 699 endprotoent(); 700 return (knownname(p->p_name)); 701 } 702 } 703 endprotoent(); 704 return (NULL); 705} 706 707static void 708usage(void) 709{ 710 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", 711"usage: netstat [-AaLnSW] [-f protocol_family | -p protocol]\n" 712" [-M core] [-N system]", 713" netstat -i | -I interface [-abdhnt] [-f address_family]\n" 714" [-M core] [-N system]", 715" netstat -w wait [-I interface] [-d] [-M core] [-N system]", 716" netstat -s [-s] [-z] [-f protocol_family | -p protocol] [-M core]", 717" netstat -i | -I interface -s [-f protocol_family | -p protocol]\n" 718" [-M core] [-N system]", 719" netstat -m [-M core] [-N system]", 720" netstat -r [-AenW] [-f address_family] [-M core] [-N system]", 721" netstat -rs [-s] [-M core] [-N system]", 722" netstat -g [-W] [-f address_family] [-M core] [-N system]", 723" netstat -gs [-s] [-f address_family] [-M core] [-N system]"); 724 exit(1); 725} 726