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 35 char 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 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)main.c 8.4 (Berkeley) 3/1/94"; 43 #endif 44 static const char rcsid[] = 45 "$FreeBSD$"; 46 #endif /* not lint */ 47 48 #include <sys/param.h> 49 #include <sys/file.h> 50 #include <sys/protosw.h> 51 #include <sys/socket.h> 52 53 #include <netinet/in.h> 54 55 #include <netgraph/ng_socket.h> 56 57 #include <ctype.h> 58 #include <err.h> 59 #include <errno.h> 60 #include <kvm.h> 61 #include <limits.h> 62 #include <netdb.h> 63 #include <nlist.h> 64 #include <paths.h> 65 #include <stdio.h> 66 #include <stdlib.h> 67 #include <string.h> 68 #include <unistd.h> 69 #include "netstat.h" 70 71 static struct nlist nl[] = { 72 #define N_IFNET 0 73 { "_ifnet" }, 74 #define N_IMP 1 75 { "_imp_softc" }, 76 #define N_RTSTAT 2 77 { "_rtstat" }, 78 #define N_UNIXSW 3 79 { "_localsw" }, 80 #define N_IDP 4 81 { "_nspcb"}, 82 #define N_IDPSTAT 5 83 { "_idpstat"}, 84 #define N_SPPSTAT 6 85 { "_spp_istat"}, 86 #define N_NSERR 7 87 { "_ns_errstat"}, 88 #define N_CLNPSTAT 8 89 { "_clnp_stat"}, 90 #define IN_NOTUSED 9 91 { "_tp_inpcb" }, 92 #define ISO_TP 10 93 { "_tp_refinfo" }, 94 #define N_TPSTAT 11 95 { "_tp_stat" }, 96 #define N_ESISSTAT 12 97 { "_esis_stat"}, 98 #define N_NIMP 13 99 { "_nimp"}, 100 #define N_RTREE 14 101 { "_rt_tables"}, 102 #define N_CLTP 15 103 { "_cltb"}, 104 #define N_CLTPSTAT 16 105 { "_cltpstat"}, 106 #define N_NFILE 17 107 { "_nfile" }, 108 #define N_FILE 18 109 { "_file" }, 110 #define N_MRTSTAT 19 111 { "_mrtstat" }, 112 #define N_MFCTABLE 20 113 { "_mfctable" }, 114 #define N_VIFTABLE 21 115 { "_viftable" }, 116 #define N_IPX 22 117 { "_ipxpcb"}, 118 #define N_IPXSTAT 23 119 { "_ipxstat"}, 120 #define N_SPXSTAT 24 121 { "_spx_istat"}, 122 #define N_DDPSTAT 25 123 { "_ddpstat"}, 124 #define N_DDPCB 26 125 { "_ddpcb"}, 126 #define N_NGSOCKS 27 127 { "_ngsocklist"}, 128 #define N_IP6STAT 28 129 { "_ip6stat" }, 130 #define N_ICMP6STAT 29 131 { "_icmp6stat" }, 132 #define N_IPSECSTAT 30 133 { "_ipsecstat" }, 134 #define N_IPSEC6STAT 31 135 { "_ipsec6stat" }, 136 #define N_PIM6STAT 32 137 { "_pim6stat" }, 138 #define N_MRT6PROTO 33 139 { "_ip6_mrtproto" }, 140 #define N_MRT6STAT 34 141 { "_mrt6stat" }, 142 #define N_MF6CTABLE 35 143 { "_mf6ctable" }, 144 #define N_MIF6TABLE 36 145 { "_mif6table" }, 146 #define N_PFKEYSTAT 37 147 { "_pfkeystat" }, 148 #define N_MBSTAT 38 149 { "_mbstat" }, 150 #define N_MBTYPES 39 151 { "_mbtypes" }, 152 #define N_NMBCLUSTERS 40 153 { "_nmbclusters" }, 154 #define N_NMBUFS 41 155 { "_nmbufs" }, 156 #define N_MBHI 42 157 { "_mbuf_hiwm" }, 158 #define N_CLHI 43 159 { "_clust_hiwm" }, 160 #define N_NCPUS 44 161 { "_smp_cpus" }, 162 #define N_PAGESZ 45 163 { "_pagesize" }, 164 #define N_MBPSTAT 46 165 { "_mb_statpcpu" }, 166 #define N_RTTRASH 47 167 { "_rttrash" }, 168 #define N_MBLO 48 169 { "_mbuf_lowm" }, 170 #define N_CLLO 49 171 { "_clust_lowm" }, 172 { "" }, 173 }; 174 175 struct protox { 176 u_char pr_index; /* index into nlist of cb head */ 177 u_char pr_sindex; /* index into nlist of stat block */ 178 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 179 void (*pr_cblocks)(u_long, const char *, int); 180 /* control blocks printing routine */ 181 void (*pr_stats)(u_long, const char *, int); 182 /* statistics printing routine */ 183 void (*pr_istats)(char *); /* per/if statistics printing routine */ 184 const char *pr_name; /* well-known name */ 185 u_long pr_usesysctl; /* true if we use sysctl, not kvm */ 186 } protox[] = { 187 { -1, -1, 1, protopr, 188 tcp_stats, NULL, "tcp", IPPROTO_TCP }, 189 { -1, -1, 1, protopr, 190 udp_stats, NULL, "udp", IPPROTO_UDP }, 191 { -1, -1, 1, protopr, 192 NULL, NULL, "divert",IPPROTO_DIVERT }, 193 { -1, -1, 1, protopr, 194 ip_stats, NULL, "ip", IPPROTO_RAW }, 195 { -1, -1, 1, protopr, 196 icmp_stats, NULL, "icmp", IPPROTO_ICMP }, 197 { -1, -1, 1, protopr, 198 igmp_stats, NULL, "igmp", IPPROTO_IGMP }, 199 #ifdef IPSEC 200 { -1, N_IPSECSTAT, 1, 0, 201 ipsec_stats, NULL, "ipsec", 0}, 202 #endif 203 { -1, -1, 1, 0, 204 bdg_stats, NULL, "bdg", 1 /* bridging... */ }, 205 { -1, -1, 0, 0, 206 0, NULL, 0, 0 } 207 }; 208 209 #ifdef INET6 210 struct protox ip6protox[] = { 211 { -1, -1, 1, protopr, 212 tcp_stats, NULL, "tcp", IPPROTO_TCP }, 213 { -1, -1, 1, protopr, 214 udp_stats, NULL, "udp", IPPROTO_UDP }, 215 { -1, N_IP6STAT, 1, protopr, 216 ip6_stats, ip6_ifstats, "ip6", IPPROTO_RAW }, 217 { -1, N_ICMP6STAT, 1, protopr, 218 icmp6_stats, icmp6_ifstats, "icmp6",IPPROTO_ICMPV6 }, 219 #ifdef IPSEC 220 { -1, N_IPSEC6STAT, 1, 0, 221 ipsec_stats, NULL, "ipsec6",0 }, 222 #endif 223 #ifdef notyet 224 { -1, N_PIM6STAT, 1, 0, 225 pim6_stats, NULL, "pim6", 0 }, 226 #endif 227 { -1, -1, 1, 0, 228 rip6_stats, NULL, "rip6", 0 }, 229 { -1, -1, 1, 0, 230 bdg_stats, NULL, "bdg", 1 /* bridging... */ }, 231 { -1, -1, 0, 0, 232 0, NULL, 0, 0 } 233 }; 234 #endif /*INET6*/ 235 236 #ifdef IPSEC 237 struct protox pfkeyprotox[] = { 238 { -1, N_PFKEYSTAT, 1, 0, 239 pfkey_stats, NULL, "pfkey", 0 }, 240 { -1, -1, 0, 0, 241 0, NULL, 0, 0 } 242 }; 243 #endif 244 245 struct protox atalkprotox[] = { 246 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, 247 ddp_stats, NULL, "ddp", 0 }, 248 { -1, -1, 0, 0, 249 0, NULL, 0, 0 } 250 }; 251 252 struct protox netgraphprotox[] = { 253 { N_NGSOCKS, -1, 1, netgraphprotopr, 254 NULL, NULL, "ctrl", 0 }, 255 { N_NGSOCKS, -1, 1, netgraphprotopr, 256 NULL, NULL, "data", 0 }, 257 { -1, NULL, 0, 0, 258 0, NULL, 0, 0 } 259 }; 260 261 struct protox ipxprotox[] = { 262 { N_IPX, N_IPXSTAT, 1, ipxprotopr, 263 ipx_stats, NULL, "ipx", 0 }, 264 { N_IPX, N_SPXSTAT, 1, ipxprotopr, 265 spx_stats, NULL, "spx", 0 }, 266 { -1, -1, 0, 0, 267 0, NULL, 0, 0 } 268 }; 269 270 #ifdef NS 271 struct protox nsprotox[] = { 272 { N_IDP, N_IDPSTAT, 1, nsprotopr, 273 idp_stats, NULL, "idp" }, 274 { N_IDP, N_SPPSTAT, 1, nsprotopr, 275 spp_stats, NULL, "spp" }, 276 { -1, N_NSERR, 1, 0, 277 nserr_stats, NULL, "ns_err" }, 278 { -1, -1, 0, 0, 279 0, NULL, 0 } 280 }; 281 #endif 282 283 #ifdef ISO 284 struct protox isoprotox[] = { 285 { ISO_TP, N_TPSTAT, 1, iso_protopr, 286 tp_stats, NULL, "tp" }, 287 { N_CLTP, N_CLTPSTAT, 1, iso_protopr, 288 cltp_stats, NULL, "cltp" }, 289 { -1, N_CLNPSTAT, 1, 0, 290 clnp_stats, NULL, "clnp"}, 291 { -1, N_ESISSTAT, 1, 0, 292 esis_stats, NULL, "esis"}, 293 { -1, -1, 0, 0, 294 0, NULL, 0 } 295 }; 296 #endif 297 298 struct protox *protoprotox[] = { 299 protox, 300 #ifdef INET6 301 ip6protox, 302 #endif 303 #ifdef IPSEC 304 pfkeyprotox, 305 #endif 306 ipxprotox, atalkprotox, 307 #ifdef NS 308 nsprotox, 309 #endif 310 #ifdef ISO 311 isoprotox, 312 #endif 313 NULL }; 314 315 static void printproto (struct protox *, const char *); 316 static void usage (void); 317 static struct protox *name2protox (char *); 318 static struct protox *knownname (char *); 319 320 static kvm_t *kvmd; 321 static char *nlistf = NULL, *memf = NULL; 322 323 int Aflag; /* show addresses of protocol control block */ 324 int aflag; /* show all sockets (including servers) */ 325 int bflag; /* show i/f total bytes in/out */ 326 int dflag; /* show i/f dropped packets */ 327 int gflag; /* show group (multicast) routing or stats */ 328 int iflag; /* show interfaces */ 329 int Lflag; /* show size of listen queues */ 330 int mflag; /* show memory stats */ 331 int numeric_addr; /* show addresses numerically */ 332 int numeric_port; /* show ports numerically */ 333 static int pflag; /* show given protocol */ 334 int rflag; /* show routing tables (or routing stats) */ 335 int sflag; /* show protocol statistics */ 336 int tflag; /* show i/f watchdog timers */ 337 int Wflag; /* wide display */ 338 int zflag; /* zero stats */ 339 340 int interval; /* repeat interval for i/f stats */ 341 342 char *interface; /* desired i/f for stats, or NULL for all i/fs */ 343 int unit; /* unit number for above */ 344 345 int af; /* address family */ 346 347 int 348 main(int argc, char *argv[]) 349 { 350 struct protox *tp = NULL; /* for printing cblocks & stats */ 351 int ch; 352 353 af = AF_UNSPEC; 354 355 while ((ch = getopt(argc, argv, "Aabdf:gI:iLlM:mN:np:rSstuWw:z")) != -1) 356 switch(ch) { 357 case 'A': 358 Aflag = 1; 359 break; 360 case 'a': 361 aflag = 1; 362 break; 363 case 'b': 364 bflag = 1; 365 break; 366 case 'd': 367 dflag = 1; 368 break; 369 case 'f': 370 #ifdef NS 371 if (strcmp(optarg, "ns") == 0) 372 af = AF_NS; 373 else 374 #endif 375 if (strcmp(optarg, "ipx") == 0) 376 af = AF_IPX; 377 else if (strcmp(optarg, "inet") == 0) 378 af = AF_INET; 379 #ifdef INET6 380 else if (strcmp(optarg, "inet6") == 0) 381 af = AF_INET6; 382 #endif /*INET6*/ 383 #ifdef INET6 384 else if (strcmp(optarg, "pfkey") == 0) 385 af = PF_KEY; 386 #endif /*INET6*/ 387 else if (strcmp(optarg, "unix") == 0) 388 af = AF_UNIX; 389 else if (strcmp(optarg, "atalk") == 0) 390 af = AF_APPLETALK; 391 else if (strcmp(optarg, "ng") == 0 392 || strcmp(optarg, "netgraph") == 0) 393 af = AF_NETGRAPH; 394 #ifdef ISO 395 else if (strcmp(optarg, "iso") == 0) 396 af = AF_ISO; 397 #endif 398 else if (strcmp(optarg, "link") == 0) 399 af = AF_LINK; 400 else { 401 errx(1, "%s: unknown address family", optarg); 402 } 403 break; 404 case 'g': 405 gflag = 1; 406 break; 407 case 'I': { 408 char *cp; 409 410 iflag = 1; 411 for (cp = interface = optarg; isalpha(*cp); cp++) 412 continue; 413 unit = atoi(cp); 414 break; 415 } 416 case 'i': 417 iflag = 1; 418 break; 419 case 'L': 420 Lflag = 1; 421 break; 422 case 'M': 423 memf = optarg; 424 break; 425 case 'm': 426 mflag = 1; 427 break; 428 case 'N': 429 nlistf = optarg; 430 break; 431 case 'n': 432 numeric_addr = numeric_port = 1; 433 break; 434 case 'p': 435 if ((tp = name2protox(optarg)) == NULL) { 436 errx(1, 437 "%s: unknown or uninstrumented protocol", 438 optarg); 439 } 440 pflag = 1; 441 break; 442 case 'r': 443 rflag = 1; 444 break; 445 case 's': 446 ++sflag; 447 break; 448 case 'S': 449 numeric_addr = 1; 450 break; 451 case 't': 452 tflag = 1; 453 break; 454 case 'u': 455 af = AF_UNIX; 456 break; 457 case 'W': 458 case 'l': 459 Wflag = 1; 460 break; 461 case 'w': 462 interval = atoi(optarg); 463 iflag = 1; 464 break; 465 case 'z': 466 zflag = 1; 467 break; 468 case '?': 469 default: 470 usage(); 471 } 472 argv += optind; 473 argc -= optind; 474 475 #define BACKWARD_COMPATIBILITY 476 #ifdef BACKWARD_COMPATIBILITY 477 if (*argv) { 478 if (isdigit(**argv)) { 479 interval = atoi(*argv); 480 if (interval <= 0) 481 usage(); 482 ++argv; 483 iflag = 1; 484 } 485 if (*argv) { 486 nlistf = *argv; 487 if (*++argv) 488 memf = *argv; 489 } 490 } 491 #endif 492 493 /* 494 * Discard setgid privileges if not the running kernel so that bad 495 * guys can't print interesting stuff from kernel memory. 496 */ 497 if (nlistf != NULL || memf != NULL) 498 setgid(getgid()); 499 500 if (mflag) { 501 if (memf != NULL) { 502 if (kread(0, 0, 0) == 0) 503 mbpr(nl[N_MBSTAT].n_value, 504 nl[N_MBTYPES].n_value, 505 nl[N_NMBCLUSTERS].n_value, 506 nl[N_NMBUFS].n_value, 507 nl[N_MBHI].n_value, 508 nl[N_CLHI].n_value, 509 nl[N_MBLO].n_value, 510 nl[N_CLLO].n_value, 511 nl[N_NCPUS].n_value, 512 nl[N_PAGESZ].n_value, 513 nl[N_MBPSTAT].n_value); 514 } else 515 mbpr(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0); 516 exit(0); 517 } 518 #if 0 519 /* 520 * Keep file descriptors open to avoid overhead 521 * of open/close on each call to get* routines. 522 */ 523 sethostent(1); 524 setnetent(1); 525 #else 526 /* 527 * This does not make sense any more with DNS being default over 528 * the files. Doing a setXXXXent(1) causes a tcp connection to be 529 * used for the queries, which is slower. 530 */ 531 #endif 532 if (iflag && !sflag) { 533 kread(0, 0, 0); 534 intpr(interval, nl[N_IFNET].n_value, NULL); 535 exit(0); 536 } 537 if (rflag) { 538 kread(0, 0, 0); 539 if (sflag) 540 rt_stats(nl[N_RTSTAT].n_value, nl[N_RTTRASH].n_value); 541 else 542 routepr(nl[N_RTREE].n_value); 543 exit(0); 544 } 545 if (gflag) { 546 kread(0, 0, 0); 547 if (sflag) { 548 if (af == AF_INET || af == AF_UNSPEC) 549 mrt_stats(nl[N_MRTSTAT].n_value); 550 #ifdef INET6 551 if (af == AF_INET6 || af == AF_UNSPEC) 552 mrt6_stats(nl[N_MRT6STAT].n_value); 553 #endif 554 } else { 555 if (af == AF_INET || af == AF_UNSPEC) 556 mroutepr(nl[N_MFCTABLE].n_value, 557 nl[N_VIFTABLE].n_value); 558 #ifdef INET6 559 if (af == AF_INET6 || af == AF_UNSPEC) 560 mroute6pr(nl[N_MF6CTABLE].n_value, 561 nl[N_MIF6TABLE].n_value); 562 #endif 563 } 564 exit(0); 565 } 566 567 kread(0, 0, 0); 568 if (tp) { 569 printproto(tp, tp->pr_name); 570 exit(0); 571 } 572 if (af == AF_INET || af == AF_UNSPEC) 573 for (tp = protox; tp->pr_name; tp++) 574 printproto(tp, tp->pr_name); 575 #ifdef INET6 576 if (af == AF_INET6 || af == AF_UNSPEC) 577 for (tp = ip6protox; tp->pr_name; tp++) 578 printproto(tp, tp->pr_name); 579 #endif /*INET6*/ 580 #ifdef IPSEC 581 if (af == PF_KEY || af == AF_UNSPEC) 582 for (tp = pfkeyprotox; tp->pr_name; tp++) 583 printproto(tp, tp->pr_name); 584 #endif /*IPSEC*/ 585 if (af == AF_IPX || af == AF_UNSPEC) { 586 kread(0, 0, 0); 587 for (tp = ipxprotox; tp->pr_name; tp++) 588 printproto(tp, tp->pr_name); 589 } 590 if (af == AF_APPLETALK || af == AF_UNSPEC) 591 for (tp = atalkprotox; tp->pr_name; tp++) 592 printproto(tp, tp->pr_name); 593 if (af == AF_NETGRAPH || af == AF_UNSPEC) 594 for (tp = netgraphprotox; tp->pr_name; tp++) 595 printproto(tp, tp->pr_name); 596 #ifdef NS 597 if (af == AF_NS || af == AF_UNSPEC) 598 for (tp = nsprotox; tp->pr_name; tp++) 599 printproto(tp, tp->pr_name); 600 #endif 601 #ifdef ISO 602 if (af == AF_ISO || af == AF_UNSPEC) 603 for (tp = isoprotox; tp->pr_name; tp++) 604 printproto(tp, tp->pr_name); 605 #endif 606 if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag) 607 unixpr(); 608 exit(0); 609 } 610 611 /* 612 * Print out protocol statistics or control blocks (per sflag). 613 * If the interface was not specifically requested, and the symbol 614 * is not in the namelist, ignore this one. 615 */ 616 static void 617 printproto(tp, name) 618 struct protox *tp; 619 const char *name; 620 { 621 void (*pr)(u_long, const char *, int); 622 u_long off; 623 624 if (sflag) { 625 if (iflag) { 626 if (tp->pr_istats) 627 intpr(interval, nl[N_IFNET].n_value, 628 tp->pr_istats); 629 else if (pflag) 630 printf("%s: no per-interface stats routine\n", 631 tp->pr_name); 632 return; 633 } 634 else { 635 pr = tp->pr_stats; 636 if (!pr) { 637 if (pflag) 638 printf("%s: no stats routine\n", 639 tp->pr_name); 640 return; 641 } 642 off = tp->pr_usesysctl ? tp->pr_usesysctl 643 : nl[tp->pr_sindex].n_value; 644 } 645 } else { 646 pr = tp->pr_cblocks; 647 if (!pr) { 648 if (pflag) 649 printf("%s: no PCB routine\n", tp->pr_name); 650 return; 651 } 652 off = tp->pr_usesysctl ? tp->pr_usesysctl 653 : nl[tp->pr_index].n_value; 654 } 655 if (pr != NULL && (off || af != AF_UNSPEC)) 656 (*pr)(off, name, af); 657 } 658 659 /* 660 * Read kernel memory, return 0 on success. 661 */ 662 int 663 kread(u_long addr, char *buf, int size) 664 { 665 if (kvmd == 0) { 666 /* 667 * XXX. 668 */ 669 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf); 670 setgid(getgid()); 671 if (kvmd != NULL) { 672 if (kvm_nlist(kvmd, nl) < 0) { 673 if(nlistf) 674 errx(1, "%s: kvm_nlist: %s", nlistf, 675 kvm_geterr(kvmd)); 676 else 677 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd)); 678 } 679 680 if (nl[0].n_type == 0) { 681 if(nlistf) 682 errx(1, "%s: no namelist", nlistf); 683 else 684 errx(1, "no namelist"); 685 } 686 } else { 687 warnx("kvm not available"); 688 return(-1); 689 } 690 } 691 if (!buf) 692 return (0); 693 if (kvm_read(kvmd, addr, buf, size) != size) { 694 warnx("%s", kvm_geterr(kvmd)); 695 return (-1); 696 } 697 return (0); 698 } 699 700 const char * 701 plural(int n) 702 { 703 return (n != 1 ? "s" : ""); 704 } 705 706 const char * 707 plurales(int n) 708 { 709 return (n != 1 ? "es" : ""); 710 } 711 712 const char * 713 pluralies(int n) 714 { 715 return (n != 1 ? "ies" : "y"); 716 } 717 718 /* 719 * Find the protox for the given "well-known" name. 720 */ 721 static struct protox * 722 knownname(char *name) 723 { 724 struct protox **tpp, *tp; 725 726 for (tpp = protoprotox; *tpp; tpp++) 727 for (tp = *tpp; tp->pr_name; tp++) 728 if (strcmp(tp->pr_name, name) == 0) 729 return (tp); 730 return (NULL); 731 } 732 733 /* 734 * Find the protox corresponding to name. 735 */ 736 static struct protox * 737 name2protox(char *name) 738 { 739 struct protox *tp; 740 char **alias; /* alias from p->aliases */ 741 struct protoent *p; 742 743 /* 744 * Try to find the name in the list of "well-known" names. If that 745 * fails, check if name is an alias for an Internet protocol. 746 */ 747 if ((tp = knownname(name)) != NULL) 748 return (tp); 749 750 setprotoent(1); /* make protocol lookup cheaper */ 751 while ((p = getprotoent()) != NULL) { 752 /* assert: name not same as p->name */ 753 for (alias = p->p_aliases; *alias; alias++) 754 if (strcmp(name, *alias) == 0) { 755 endprotoent(); 756 return (knownname(p->p_name)); 757 } 758 } 759 endprotoent(); 760 return (NULL); 761 } 762 763 static void 764 usage(void) 765 { 766 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", 767 "usage: netstat [-AaLnSW] [-f protocol_family | -p protocol]\n" 768 " [-M core] [-N system]", 769 " netstat -i | -I interface [-abdnt] [-f address_family]\n" 770 " [-M core] [-N system]", 771 " netstat -w wait [-I interface] [-d] [-M core] [-N system]", 772 " netstat -s [-s] [-z] [-f protocol_family | -p protocol] [-M core]", 773 " netstat -i | -I interface -s [-f protocol_family | -p protocol]\n" 774 " [-M core] [-N system]", 775 " netstat -m [-M core] [-N system]", 776 " netstat -r [-AanW] [-f address_family] [-M core] [-N system]", 777 " netstat -rs [-s] [-M core] [-N system]", 778 " netstat -g [-W] [-f address_family] [-M core] [-N system]", 779 " netstat -gs [-s] [-f address_family] [-M core] [-N system]"); 780 exit(1); 781 } 782