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