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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#) Copyright (c) 1983, 1988, 1993 Regents of the University of California. All rights reserved. 30 * @(#)main.c 8.4 (Berkeley) 3/1/94 31 * $FreeBSD: src/usr.bin/netstat/main.c,v 1.34.2.12 2001/09/17 15:17:46 ru Exp $ 32 */ 33 34 #include <sys/param.h> 35 #include <sys/file.h> 36 #include <sys/protosw.h> 37 #include <sys/socket.h> 38 39 #include <netinet/in.h> 40 41 #include <netgraph/socket/ng_socket.h> 42 43 #include <ctype.h> 44 #include <err.h> 45 #include <errno.h> 46 #include <kvm.h> 47 #include <limits.h> 48 #include <netdb.h> 49 #include <nlist.h> 50 #include <paths.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <unistd.h> 55 #include "netstat.h" 56 57 static struct nlist nl[] = { 58 #define N_IFNET 0 59 { .n_name = "_ifnet" }, 60 #define N_IMP 1 61 { .n_name = "_imp_softc" }, 62 #define N_RTSTAT 2 63 { .n_name = "_rtstat" }, 64 #define N_UNIXSW 3 65 { .n_name = "_localsw" }, 66 #define N_IDP 4 67 { .n_name = "_nspcb"}, 68 #define N_IDPSTAT 5 69 { .n_name = "_idpstat"}, 70 #define N_SPPSTAT 6 71 { .n_name = "_spp_istat"}, 72 #define N_NSERR 7 73 { .n_name = "_ns_errstat"}, 74 #define N_CLNPSTAT 8 75 { .n_name = "_clnp_stat"}, 76 #define IN_NOTUSED 9 77 { .n_name = "_tp_inpcb" }, 78 #define ISO_TP 10 79 { .n_name = "_tp_refinfo" }, 80 #define N_TPSTAT 11 81 { .n_name = "_tp_stat" }, 82 #define N_ESISSTAT 12 83 { .n_name = "_esis_stat"}, 84 #define N_NIMP 13 85 { .n_name = "_nimp"}, 86 #define N_RTREE 14 87 { .n_name = "_rt_tables"}, 88 #define N_CLTP 15 89 { .n_name = "_cltb"}, 90 #define N_CLTPSTAT 16 91 { .n_name = "_cltpstat"}, 92 #define N_NFILE 17 93 { .n_name = "_nfile" }, 94 #define N_FILE 18 95 { .n_name = "_file" }, 96 #define N_MRTSTAT 19 97 { .n_name = "_mrtstat" }, 98 #define N_MFCTABLE 20 99 { .n_name = "_mfctable" }, 100 #define N_VIFTABLE 21 101 { .n_name = "_viftable" }, 102 #define N_IPX 22 103 { .n_name = "_ipxpcb"}, 104 #define N_IPXSTAT 23 105 { .n_name = "_ipxstat"}, 106 #define N_SPXSTAT 24 107 { .n_name = "_spx_istat"}, 108 #define N_NGSOCKS 25 109 { .n_name = "_ngsocklist"}, 110 #define N_IP6STAT 26 111 { .n_name = "_ip6stat" }, 112 #define N_ICMP6STAT 27 113 { .n_name = "_icmp6stat" }, 114 #define N_IPSECSTAT 28 115 { .n_name = "_ipsecstat" }, 116 #define N_IPSEC6STAT 29 117 { .n_name = "_ipsec6stat" }, 118 #define N_PIM6STAT 30 119 { .n_name = "_pim6stat" }, 120 #define N_MRT6PROTO 31 121 { .n_name = "_ip6_mrtproto" }, 122 #define N_MRT6STAT 32 123 { .n_name = "_mrt6stat" }, 124 #define N_MF6CTABLE 33 125 { .n_name = "_mf6ctable" }, 126 #define N_MIF6TABLE 34 127 { .n_name = "_mif6table" }, 128 #define N_PFKEYSTAT 35 129 { .n_name = "_pfkeystat" }, 130 #define N_MBSTAT 36 131 { .n_name = "_mbstat" }, 132 #define N_MBTYPES 37 133 { .n_name = "_mbtypes" }, 134 #define N_NMBCLUSTERS 38 135 { .n_name = "_nmbclusters" }, 136 #define N_NMBUFS 39 137 { .n_name = "_nmbufs" }, 138 #define N_RTTRASH 40 139 { .n_name = "_rttrash" }, 140 #define N_NCPUS 41 141 { .n_name = "_ncpus" }, 142 #define N_CARPSTAT 42 143 { .n_name = "_carpstats" }, 144 { .n_name = NULL }, 145 }; 146 147 struct protox { 148 u_char pr_index; /* index into nlist of cb head */ 149 u_char pr_sindex; /* index into nlist of stat block */ 150 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 151 void (*pr_cblocks)(u_long, const char *, int); 152 /* control blocks printing routine */ 153 void (*pr_stats)(u_long, const char *, int); 154 /* statistics printing routine */ 155 void (*pr_istats)(char *); /* per/if statistics printing routine */ 156 const char *pr_name; /* well-known name */ 157 u_int pr_usesysctl; /* true if we use sysctl, not kvm */ 158 } protox[] = { 159 { -1, -1, 1, protopr, 160 tcp_stats, NULL, "tcp", IPPROTO_TCP }, 161 { -1, -1, 1, protopr, 162 udp_stats, NULL, "udp", IPPROTO_UDP }, 163 { -1, -1, 1, protopr, 164 NULL, NULL, "divert",IPPROTO_DIVERT }, 165 { -1, -1, 1, protopr, 166 ip_stats, NULL, "ip", IPPROTO_RAW }, 167 { -1, -1, 1, protopr, 168 icmp_stats, NULL, "icmp", IPPROTO_ICMP }, 169 { -1, -1, 1, protopr, 170 igmp_stats, NULL, "igmp", IPPROTO_IGMP }, 171 #ifdef IPSEC 172 { -1, N_IPSECSTAT, 1, 0, 173 ipsec_stats, NULL, "ipsec", 0}, 174 #endif 175 { -1, N_CARPSTAT, 1, 0, 176 carp_stats, NULL, "carp", 0}, 177 { -1, -1, 0, 0, 178 0, NULL, NULL, 0} 179 }; 180 181 #ifdef INET6 182 struct protox ip6protox[] = { 183 { -1, -1, 1, protopr, 184 tcp_stats, NULL, "tcp", IPPROTO_TCP }, 185 { -1, -1, 1, protopr, 186 udp_stats, NULL, "udp", IPPROTO_UDP }, 187 { -1, N_IP6STAT, 1, protopr, 188 ip6_stats, ip6_ifstats, "ip6", IPPROTO_RAW }, 189 { -1, N_ICMP6STAT, 1, protopr, 190 icmp6_stats, icmp6_ifstats, "icmp6",IPPROTO_ICMPV6 }, 191 #ifdef IPSEC 192 { -1, N_IPSEC6STAT, 1, 0, 193 ipsec_stats, NULL, "ipsec6",0 }, 194 #endif 195 #ifdef notyet 196 { -1, N_PIM6STAT, 1, 0, 197 pim6_stats, NULL, "pim6", 0 }, 198 #endif 199 { -1, -1, 1, 0, 200 rip6_stats, NULL, "rip6", 0 }, 201 { -1, -1, 1, protopr, 202 pim_stats, NULL, "pim", IPPROTO_PIM }, 203 { -1, -1, 0, 0, 204 0, NULL, 0, 0 } 205 }; 206 #endif /*INET6*/ 207 208 #ifdef IPSEC 209 struct protox pfkeyprotox[] = { 210 { -1, N_PFKEYSTAT, 1, 0, 211 pfkey_stats, NULL, "pfkey", 0 }, 212 { -1, -1, 0, 0, 213 0, NULL, 0, 0 } 214 }; 215 #endif 216 217 struct protox netgraphprotox[] = { 218 { N_NGSOCKS, -1, 1, netgraphprotopr, 219 NULL, NULL, "ctrl", 0 }, 220 { N_NGSOCKS, -1, 1, netgraphprotopr, 221 NULL, NULL, "data", 0 }, 222 { -1, -1, 0, 0, 223 0, NULL, NULL, 0 } 224 }; 225 226 struct protox ipxprotox[] = { 227 { N_IPX, N_IPXSTAT, 1, ipxprotopr, 228 ipx_stats, NULL, "ipx", 0 }, 229 { N_IPX, N_SPXSTAT, 1, ipxprotopr, 230 spx_stats, NULL, "spx", 0 }, 231 { -1, -1, 0, 0, 232 0, NULL, 0, 0 } 233 }; 234 235 #ifdef ISO 236 struct protox isoprotox[] = { 237 { ISO_TP, N_TPSTAT, 1, iso_protopr, 238 tp_stats, NULL, "tp" }, 239 { N_CLTP, N_CLTPSTAT, 1, iso_protopr, 240 cltp_stats, NULL, "cltp" }, 241 { -1, N_CLNPSTAT, 1, 0, 242 clnp_stats, NULL, "clnp"}, 243 { -1, N_ESISSTAT, 1, 0, 244 esis_stats, NULL, "esis"}, 245 { -1, -1, 0, 0, 246 0, NULL, 0 } 247 }; 248 #endif 249 250 struct protox *protoprotox[] = { 251 protox, 252 #ifdef INET6 253 ip6protox, 254 #endif 255 #ifdef IPSEC 256 pfkeyprotox, 257 #endif 258 ipxprotox, 259 #ifdef ISO 260 isoprotox, 261 #endif 262 NULL }; 263 264 static void printproto (struct protox *, const char *, u_long); 265 static void usage (void); 266 static struct protox *name2protox (char *); 267 static struct protox *knownname (char *); 268 269 static kvm_t *kvmd; 270 static char *nlistf = NULL, *memf = NULL; 271 272 int Aflag; /* show addresses of protocol control block */ 273 int aflag; /* show all sockets (including servers) */ 274 int bflag; /* show i/f total bytes in/out */ 275 int cpuflag = -1; /* dump route table from specific cpu */ 276 int dflag; /* show i/f dropped packets */ 277 int gflag; /* show group (multicast) routing or stats */ 278 int iflag; /* show interfaces */ 279 int Lflag; /* show size of listen queues */ 280 int mflag; /* show memory stats */ 281 int Pflag; /* show more protocol info (go past 80 columns) */ 282 int numeric_addr; /* show addresses numerically */ 283 int numeric_port; /* show ports numerically */ 284 static int pflag; /* show given protocol */ 285 int rflag; /* show routing tables (or routing stats) */ 286 int sflag; /* show protocol statistics */ 287 int tflag; /* show i/f watchdog timers */ 288 int Bflag; /* show buffer limit instead of buffer use */ 289 int Wflag; /* wide display */ 290 int zflag; /* zero stats */ 291 292 int interval; /* repeat interval for i/f stats */ 293 294 char *interface; /* desired i/f for stats, or NULL for all i/fs */ 295 int unit; /* unit number for above */ 296 297 int af; /* address family */ 298 299 int 300 main(int argc, char **argv) 301 { 302 struct protox *tp = NULL; /* for printing cblocks & stats */ 303 int ch; 304 int n; 305 306 af = AF_UNSPEC; 307 308 while ((ch = getopt(argc, argv, "Aabc:df:gI:iLlM:mN:nPp:rSsBtuWw:z")) != -1) 309 switch(ch) { 310 case 'A': 311 Aflag = 1; 312 break; 313 case 'a': 314 aflag = 1; 315 break; 316 case 'b': 317 bflag = 1; 318 break; 319 case 'c': 320 kread(0, 0, 0); 321 kread(nl[N_NCPUS].n_value, (char *)&n, sizeof(n)); 322 cpuflag = strtol(optarg, NULL, 0); 323 if (cpuflag < 0 || cpuflag >= n) 324 errx(1, "cpu %d does not exist", cpuflag); 325 break; 326 case 'd': 327 dflag = 1; 328 break; 329 case 'f': 330 if (strcmp(optarg, "ipx") == 0) 331 af = AF_IPX; 332 else if (strcmp(optarg, "inet") == 0) 333 af = AF_INET; 334 #ifdef INET6 335 else if (strcmp(optarg, "inet6") == 0) 336 af = AF_INET6; 337 #endif /*INET6*/ 338 #ifdef INET6 339 else if (strcmp(optarg, "pfkey") == 0) 340 af = PF_KEY; 341 #endif /*INET6*/ 342 else if (strcmp(optarg, "unix") == 0) 343 af = AF_UNIX; 344 else if (strcmp(optarg, "ng") == 0 345 || strcmp(optarg, "netgraph") == 0) 346 af = AF_NETGRAPH; 347 #ifdef ISO 348 else if (strcmp(optarg, "iso") == 0) 349 af = AF_ISO; 350 #endif 351 else if (strcmp(optarg, "link") == 0) 352 af = AF_LINK; 353 else if (strcmp(optarg, "mpls") == 0) 354 af = AF_MPLS; 355 else { 356 errx(1, "%s: unknown address family", optarg); 357 } 358 break; 359 case 'g': 360 gflag = 1; 361 break; 362 case 'I': { 363 char *cp; 364 365 iflag = 1; 366 for (cp = interface = optarg; isalpha(*cp); cp++) 367 continue; 368 unit = atoi(cp); 369 break; 370 } 371 case 'i': 372 iflag = 1; 373 break; 374 case 'L': 375 Lflag = 1; 376 break; 377 case 'M': 378 memf = optarg; 379 break; 380 case 'm': 381 mflag = 1; 382 break; 383 case 'N': 384 nlistf = optarg; 385 break; 386 case 'n': 387 numeric_addr = numeric_port = 1; 388 break; 389 case 'P': 390 Pflag = 1; 391 break; 392 case 'p': 393 if ((tp = name2protox(optarg)) == NULL) { 394 errx(1, 395 "%s: unknown or uninstrumented protocol", 396 optarg); 397 } 398 pflag = 1; 399 break; 400 case 'r': 401 rflag = 1; 402 break; 403 case 's': 404 ++sflag; 405 break; 406 case 'S': 407 numeric_addr = 1; 408 break; 409 case 'B': 410 Bflag = 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 (mflag) { 462 if (memf != NULL) { 463 if (kread(0, 0, 0) == 0) 464 mbpr(nl[N_MBSTAT].n_value, 465 nl[N_MBTYPES].n_value, 466 nl[N_NMBCLUSTERS].n_value, 467 nl[N_NMBUFS].n_value, 468 nl[N_NCPUS].n_value); 469 } else { 470 mbpr(0, 0, 0, 0, 0); 471 } 472 exit(0); 473 } 474 #if 0 475 /* 476 * Keep file descriptors open to avoid overhead 477 * of open/close on each call to get* routines. 478 */ 479 sethostent(1); 480 setnetent(1); 481 #else 482 /* 483 * This does not make sense any more with DNS being default over 484 * the files. Doing a setXXXXent(1) causes a tcp connection to be 485 * used for the queries, which is slower. 486 */ 487 #endif 488 if (iflag && !sflag) { 489 kread(0, 0, 0); 490 intpr(interval, nl[N_IFNET].n_value, NULL, nl[N_NCPUS].n_value); 491 exit(0); 492 } 493 if (rflag) { 494 kread(0, 0, 0); 495 if (sflag) 496 rt_stats(); 497 else 498 routepr(nl[N_RTREE].n_value); 499 exit(0); 500 } 501 if (gflag) { 502 kread(0, 0, 0); 503 if (sflag) { 504 if (af == AF_INET || af == AF_UNSPEC) 505 mrt_stats(nl[N_MRTSTAT].n_value); 506 #ifdef INET6 507 if (af == AF_INET6 || af == AF_UNSPEC) 508 mrt6_stats(nl[N_MRT6STAT].n_value); 509 #endif 510 } else { 511 if (af == AF_INET || af == AF_UNSPEC) 512 mroutepr(nl[N_MFCTABLE].n_value, 513 nl[N_VIFTABLE].n_value); 514 #ifdef INET6 515 if (af == AF_INET6 || af == AF_UNSPEC) 516 mroute6pr(nl[N_MF6CTABLE].n_value, 517 nl[N_MIF6TABLE].n_value); 518 #endif 519 } 520 exit(0); 521 } 522 523 kread(0, 0, 0); 524 if (tp) { 525 printproto(tp, tp->pr_name, nl[N_NCPUS].n_value); 526 exit(0); 527 } 528 if (af == AF_INET || af == AF_UNSPEC) 529 for (tp = protox; tp->pr_name; tp++) 530 printproto(tp, tp->pr_name, nl[N_NCPUS].n_value); 531 #ifdef INET6 532 if (af == AF_INET6 || af == AF_UNSPEC) 533 for (tp = ip6protox; tp->pr_name; tp++) 534 printproto(tp, tp->pr_name, nl[N_NCPUS].n_value); 535 #endif /*INET6*/ 536 #ifdef IPSEC 537 if (af == PF_KEY || af == AF_UNSPEC) 538 for (tp = pfkeyprotox; tp->pr_name; tp++) 539 printproto(tp, tp->pr_name, nl[N_NCPUS].n_value); 540 #endif /*IPSEC*/ 541 if (af == AF_IPX || af == AF_UNSPEC) { 542 kread(0, 0, 0); 543 for (tp = ipxprotox; tp->pr_name; tp++) 544 printproto(tp, tp->pr_name, nl[N_NCPUS].n_value); 545 } 546 if (af == AF_NETGRAPH || af == AF_UNSPEC) 547 for (tp = netgraphprotox; tp->pr_name; tp++) 548 printproto(tp, tp->pr_name, nl[N_NCPUS].n_value); 549 #ifdef ISO 550 if (af == AF_ISO || af == AF_UNSPEC) 551 for (tp = isoprotox; tp->pr_name; tp++) 552 printproto(tp, tp->pr_name, nl[N_NCPUS].n_value); 553 #endif 554 if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag) 555 unixpr(); 556 exit(0); 557 } 558 559 /* 560 * Print out protocol statistics or control blocks (per sflag). 561 * If the interface was not specifically requested, and the symbol 562 * is not in the namelist, ignore this one. 563 */ 564 static void 565 printproto(struct protox *tp, const char *name, u_long ncpusaddr) 566 { 567 void (*pr)(u_long, const char *, int); 568 u_long off; 569 570 if (sflag) { 571 if (iflag) { 572 if (tp->pr_istats) 573 intpr(interval, nl[N_IFNET].n_value, 574 tp->pr_istats, ncpusaddr); 575 else if (pflag) 576 printf("%s: no per-interface stats routine\n", 577 tp->pr_name); 578 return; 579 } 580 else { 581 pr = tp->pr_stats; 582 if (!pr) { 583 if (pflag) 584 printf("%s: no stats routine\n", 585 tp->pr_name); 586 return; 587 } 588 off = tp->pr_usesysctl ? tp->pr_usesysctl 589 : nl[tp->pr_sindex].n_value; 590 } 591 } else { 592 pr = tp->pr_cblocks; 593 if (!pr) { 594 if (pflag) 595 printf("%s: no PCB routine\n", tp->pr_name); 596 return; 597 } 598 off = tp->pr_usesysctl ? tp->pr_usesysctl 599 : nl[tp->pr_index].n_value; 600 } 601 if (pr != NULL && (off || af != AF_UNSPEC)) 602 (*pr)(off, name, af); 603 } 604 605 /* 606 * Read kernel memory, return 0 on success. 607 */ 608 int 609 kread(u_long addr, char *buf, int size) 610 { 611 if (kvmd == NULL) { 612 /* 613 * XXX. 614 */ 615 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf); 616 if (kvmd != NULL) { 617 if (kvm_nlist(kvmd, nl) < 0) { 618 if(nlistf) 619 errx(1, "%s: kvm_nlist: %s", nlistf, 620 kvm_geterr(kvmd)); 621 else 622 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd)); 623 } 624 625 if (nl[0].n_type == 0) { 626 if(nlistf) 627 errx(1, "%s: no namelist", nlistf); 628 else 629 errx(1, "no namelist"); 630 } 631 } else { 632 warnx("kvm not available"); 633 return(-1); 634 } 635 } 636 if (!buf) 637 return (0); 638 if (kvm_read(kvmd, addr, buf, size) != size) { 639 warnx("%s", kvm_geterr(kvmd)); 640 return (-1); 641 } 642 return (0); 643 } 644 645 const char * 646 plural(int n) 647 { 648 return (n != 1 ? "s" : ""); 649 } 650 651 const char * 652 plurales(int n) 653 { 654 return (n != 1 ? "es" : ""); 655 } 656 657 /* 658 * Find the protox for the given "well-known" name. 659 */ 660 static struct protox * 661 knownname(char *name) 662 { 663 struct protox **tpp, *tp; 664 665 for (tpp = protoprotox; *tpp; tpp++) 666 for (tp = *tpp; tp->pr_name; tp++) 667 if (strcmp(tp->pr_name, name) == 0) 668 return (tp); 669 return (NULL); 670 } 671 672 /* 673 * Find the protox corresponding to name. 674 */ 675 static struct protox * 676 name2protox(char *name) 677 { 678 struct protox *tp; 679 char **alias; /* alias from p->aliases */ 680 struct protoent *p; 681 682 /* 683 * Try to find the name in the list of "well-known" names. If that 684 * fails, check if name is an alias for an Internet protocol. 685 */ 686 if ((tp = knownname(name)) != NULL) 687 return (tp); 688 689 setprotoent(1); /* make protocol lookup cheaper */ 690 while ((p = getprotoent()) != NULL) { 691 /* assert: name not same as p->name */ 692 for (alias = p->p_aliases; *alias; alias++) 693 if (strcmp(name, *alias) == 0) { 694 endprotoent(); 695 return (knownname(p->p_name)); 696 } 697 } 698 endprotoent(); 699 return (NULL); 700 } 701 702 static void 703 usage(void) 704 { 705 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", 706 "usage: netstat [-AaLnPSW] [-c cpu] [-f protocol_family | -p protocol]\n" 707 " [-M core] [-N system]", 708 " netstat -i | -I interface [-aBbdnt] [-f address_family]\n" 709 " [-M core] [-N system]", 710 " netstat -w wait [-I interface] [-d] [-M core] [-N system]", 711 " netstat -s [-s] [-z] [-f protocol_family | -p protocol] [-M core]", 712 " netstat -i | -I interface -s [-f protocol_family | -p protocol]\n" 713 " [-M core] [-N system]", 714 " netstat -m [-M core] [-N system]", 715 " netstat -r [-AanW] [-f address_family] [-M core] [-N system]", 716 " netstat -rs [-s] [-M core] [-N system]", 717 " netstat -g [-W] [-f address_family] [-M core] [-N system]", 718 " netstat -gs [-s] [-f address_family] [-M core] [-N system]"); 719 exit(1); 720 } 721