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 * @(#) Copyright (c) 1983, 1988, 1993 Regents of the University of California. All rights reserved. 34 * @(#)main.c 8.4 (Berkeley) 3/1/94 35 * $FreeBSD: src/usr.bin/netstat/main.c,v 1.34.2.12 2001/09/17 15:17:46 ru Exp $ 36 * $DragonFly: src/usr.bin/netstat/main.c,v 1.12 2006/06/25 11:02:40 corecode Exp $ 37 */ 38 39 #include <sys/param.h> 40 #include <sys/file.h> 41 #include <sys/protosw.h> 42 #include <sys/socket.h> 43 44 #include <netinet/in.h> 45 46 #include <netgraph/socket/ng_socket.h> 47 48 #include <ctype.h> 49 #include <err.h> 50 #include <errno.h> 51 #include <kvm.h> 52 #include <limits.h> 53 #include <netdb.h> 54 #include <nlist.h> 55 #include <paths.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <unistd.h> 60 #include "netstat.h" 61 62 static struct nlist nl[] = { 63 #define N_IFNET 0 64 { "_ifnet" }, 65 #define N_IMP 1 66 { "_imp_softc" }, 67 #define N_RTSTAT 2 68 { "_rtstat" }, 69 #define N_UNIXSW 3 70 { "_localsw" }, 71 #define N_IDP 4 72 { "_nspcb"}, 73 #define N_IDPSTAT 5 74 { "_idpstat"}, 75 #define N_SPPSTAT 6 76 { "_spp_istat"}, 77 #define N_NSERR 7 78 { "_ns_errstat"}, 79 #define N_CLNPSTAT 8 80 { "_clnp_stat"}, 81 #define IN_NOTUSED 9 82 { "_tp_inpcb" }, 83 #define ISO_TP 10 84 { "_tp_refinfo" }, 85 #define N_TPSTAT 11 86 { "_tp_stat" }, 87 #define N_ESISSTAT 12 88 { "_esis_stat"}, 89 #define N_NIMP 13 90 { "_nimp"}, 91 #define N_RTREE 14 92 { "_rt_tables"}, 93 #define N_CLTP 15 94 { "_cltb"}, 95 #define N_CLTPSTAT 16 96 { "_cltpstat"}, 97 #define N_NFILE 17 98 { "_nfile" }, 99 #define N_FILE 18 100 { "_file" }, 101 #define N_MRTSTAT 19 102 { "_mrtstat" }, 103 #define N_MFCTABLE 20 104 { "_mfctable" }, 105 #define N_VIFTABLE 21 106 { "_viftable" }, 107 #define N_IPX 22 108 { "_ipxpcb"}, 109 #define N_IPXSTAT 23 110 { "_ipxstat"}, 111 #define N_SPXSTAT 24 112 { "_spx_istat"}, 113 #define N_DDPSTAT 25 114 { "_ddpstat"}, 115 #define N_DDPCB 26 116 { "_ddpcb"}, 117 #define N_NGSOCKS 27 118 { "_ngsocklist"}, 119 #define N_IP6STAT 28 120 { "_ip6stat" }, 121 #define N_ICMP6STAT 29 122 { "_icmp6stat" }, 123 #define N_IPSECSTAT 30 124 { "_ipsecstat" }, 125 #define N_IPSEC6STAT 31 126 { "_ipsec6stat" }, 127 #define N_PIM6STAT 32 128 { "_pim6stat" }, 129 #define N_MRT6PROTO 33 130 { "_ip6_mrtproto" }, 131 #define N_MRT6STAT 34 132 { "_mrt6stat" }, 133 #define N_MF6CTABLE 35 134 { "_mf6ctable" }, 135 #define N_MIF6TABLE 36 136 { "_mif6table" }, 137 #define N_PFKEYSTAT 37 138 { "_pfkeystat" }, 139 #define N_MBSTAT 38 140 { "_mbstat" }, 141 #define N_MBTYPES 39 142 { "_mbtypes" }, 143 #define N_NMBCLUSTERS 40 144 { "_nmbclusters" }, 145 #define N_NMBUFS 41 146 { "_nmbufs" }, 147 #define N_RTTRASH 42 148 { "_rttrash" }, 149 #define N_NCPUS 43 150 { "_ncpus" }, 151 { "" }, 152 }; 153 154 struct protox { 155 u_char pr_index; /* index into nlist of cb head */ 156 u_char pr_sindex; /* index into nlist of stat block */ 157 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 158 void (*pr_cblocks)(u_long, char *, int); 159 /* control blocks printing routine */ 160 void (*pr_stats)(u_long, char *, int); 161 /* statistics printing routine */ 162 void (*pr_istats)(char *); /* per/if statistics printing routine */ 163 char *pr_name; /* well-known name */ 164 int pr_usesysctl; /* true if we use sysctl, not kvm */ 165 } protox[] = { 166 { -1, -1, 1, protopr, 167 tcp_stats, NULL, "tcp", IPPROTO_TCP }, 168 { -1, -1, 1, protopr, 169 udp_stats, NULL, "udp", IPPROTO_UDP }, 170 { -1, -1, 1, protopr, 171 NULL, NULL, "divert",IPPROTO_DIVERT }, 172 { -1, -1, 1, protopr, 173 ip_stats, NULL, "ip", IPPROTO_RAW }, 174 { -1, -1, 1, protopr, 175 icmp_stats, NULL, "icmp", IPPROTO_ICMP }, 176 { -1, -1, 1, protopr, 177 igmp_stats, NULL, "igmp", IPPROTO_IGMP }, 178 #ifdef IPSEC 179 { -1, N_IPSECSTAT, 1, 0, 180 ipsec_stats, NULL, "ipsec", 0}, 181 #endif 182 { -1, -1, 0, 0, 183 0, NULL, 0 } 184 }; 185 186 #ifdef INET6 187 struct 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, 0, 198 ipsec_stats, NULL, "ipsec6",0 }, 199 #endif 200 #ifdef notyet 201 { -1, N_PIM6STAT, 1, 0, 202 pim6_stats, NULL, "pim6", 0 }, 203 #endif 204 { -1, -1, 1, 0, 205 rip6_stats, NULL, "rip6", 0 }, 206 { -1, -1, 1, protopr, 207 pim_stats, NULL, "pim", IPPROTO_PIM }, 208 { -1, -1, 0, 0, 209 0, NULL, 0, 0 } 210 }; 211 #endif /*INET6*/ 212 213 #ifdef IPSEC 214 struct protox pfkeyprotox[] = { 215 { -1, N_PFKEYSTAT, 1, 0, 216 pfkey_stats, NULL, "pfkey", 0 }, 217 { -1, -1, 0, 0, 218 0, NULL, 0, 0 } 219 }; 220 #endif 221 222 struct protox atalkprotox[] = { 223 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, 224 ddp_stats, NULL, "ddp" }, 225 { -1, -1, 0, 0, 226 0, NULL, 0 } 227 }; 228 229 struct protox netgraphprotox[] = { 230 { N_NGSOCKS, -1, 1, netgraphprotopr, 231 NULL, NULL, "ctrl" }, 232 { N_NGSOCKS, -1, 1, netgraphprotopr, 233 NULL, NULL, "data" }, 234 { -1, NULL, 0, 0, 235 0, NULL, 0 } 236 }; 237 238 struct protox ipxprotox[] = { 239 { N_IPX, N_IPXSTAT, 1, ipxprotopr, 240 ipx_stats, NULL, "ipx", 0 }, 241 { N_IPX, N_SPXSTAT, 1, ipxprotopr, 242 spx_stats, NULL, "spx", 0 }, 243 { -1, -1, 0, 0, 244 0, NULL, 0, 0 } 245 }; 246 247 #ifdef NS 248 struct protox nsprotox[] = { 249 { N_IDP, N_IDPSTAT, 1, nsprotopr, 250 idp_stats, NULL, "idp" }, 251 { N_IDP, N_SPPSTAT, 1, nsprotopr, 252 spp_stats, NULL, "spp" }, 253 { -1, N_NSERR, 1, 0, 254 nserr_stats, NULL, "ns_err" }, 255 { -1, -1, 0, 0, 256 0, NULL, 0 } 257 }; 258 #endif 259 260 #ifdef ISO 261 struct protox isoprotox[] = { 262 { ISO_TP, N_TPSTAT, 1, iso_protopr, 263 tp_stats, NULL, "tp" }, 264 { N_CLTP, N_CLTPSTAT, 1, iso_protopr, 265 cltp_stats, NULL, "cltp" }, 266 { -1, N_CLNPSTAT, 1, 0, 267 clnp_stats, NULL, "clnp"}, 268 { -1, N_ESISSTAT, 1, 0, 269 esis_stats, NULL, "esis"}, 270 { -1, -1, 0, 0, 271 0, NULL, 0 } 272 }; 273 #endif 274 275 struct protox *protoprotox[] = { 276 protox, 277 #ifdef INET6 278 ip6protox, 279 #endif 280 #ifdef IPSEC 281 pfkeyprotox, 282 #endif 283 ipxprotox, atalkprotox, 284 #ifdef NS 285 nsprotox, 286 #endif 287 #ifdef ISO 288 isoprotox, 289 #endif 290 NULL }; 291 292 static void printproto (struct protox *, char *); 293 static void usage (void); 294 static struct protox *name2protox (char *); 295 static struct protox *knownname (char *); 296 297 static kvm_t *kvmd; 298 static char *nlistf = NULL, *memf = NULL; 299 300 int Aflag; /* show addresses of protocol control block */ 301 int aflag; /* show all sockets (including servers) */ 302 int bflag; /* show i/f total bytes in/out */ 303 int cpuflag = -1; /* dump route table from specific cpu */ 304 int dflag; /* show i/f dropped packets */ 305 int gflag; /* show group (multicast) routing or stats */ 306 int iflag; /* show interfaces */ 307 int Lflag; /* show size of listen queues */ 308 int mflag; /* show memory stats */ 309 int Pflag; /* show more protocol info (go past 80 columns) */ 310 int numeric_addr; /* show addresses numerically */ 311 int numeric_port; /* show ports numerically */ 312 static int pflag; /* show given protocol */ 313 int rflag; /* show routing tables (or routing stats) */ 314 int sflag; /* show protocol statistics */ 315 int tflag; /* show i/f watchdog timers */ 316 int Bflag; /* show buffer limit instead of buffer use */ 317 int Wflag; /* wide display */ 318 int zflag; /* zero stats */ 319 320 int interval; /* repeat interval for i/f stats */ 321 322 char *interface; /* desired i/f for stats, or NULL for all i/fs */ 323 int unit; /* unit number for above */ 324 325 int af; /* address family */ 326 327 int 328 main(int argc, char **argv) 329 { 330 struct protox *tp = NULL; /* for printing cblocks & stats */ 331 int ch; 332 int n; 333 334 af = AF_UNSPEC; 335 336 while ((ch = getopt(argc, argv, "Aabc:df:gI:iLlM:mN:nPp:rSsBtuWw:z")) != -1) 337 switch(ch) { 338 case 'A': 339 Aflag = 1; 340 break; 341 case 'a': 342 aflag = 1; 343 break; 344 case 'b': 345 bflag = 1; 346 break; 347 case 'c': 348 kread(0, 0, 0); 349 kread(nl[N_NCPUS].n_value, (char *)&n, sizeof(n)); 350 cpuflag = strtol(optarg, NULL, 0); 351 if (cpuflag < 0 || cpuflag >= n) 352 errx(1, "cpu %d does not exist", cpuflag); 353 break; 354 case 'd': 355 dflag = 1; 356 break; 357 case 'f': 358 #ifdef NS 359 if (strcmp(optarg, "ns") == 0) 360 af = AF_NS; 361 else 362 #endif 363 if (strcmp(optarg, "ipx") == 0) 364 af = AF_IPX; 365 else if (strcmp(optarg, "inet") == 0) 366 af = AF_INET; 367 #ifdef INET6 368 else if (strcmp(optarg, "inet6") == 0) 369 af = AF_INET6; 370 #endif /*INET6*/ 371 #ifdef INET6 372 else if (strcmp(optarg, "pfkey") == 0) 373 af = PF_KEY; 374 #endif /*INET6*/ 375 else if (strcmp(optarg, "unix") == 0) 376 af = AF_UNIX; 377 else if (strcmp(optarg, "atalk") == 0) 378 af = AF_APPLETALK; 379 else if (strcmp(optarg, "ng") == 0 380 || strcmp(optarg, "netgraph") == 0) 381 af = AF_NETGRAPH; 382 #ifdef ISO 383 else if (strcmp(optarg, "iso") == 0) 384 af = AF_ISO; 385 #endif 386 else if (strcmp(optarg, "link") == 0) 387 af = AF_LINK; 388 else { 389 errx(1, "%s: unknown address family", optarg); 390 } 391 break; 392 case 'g': 393 gflag = 1; 394 break; 395 case 'I': { 396 char *cp; 397 398 iflag = 1; 399 for (cp = interface = optarg; isalpha(*cp); cp++) 400 continue; 401 unit = atoi(cp); 402 break; 403 } 404 case 'i': 405 iflag = 1; 406 break; 407 case 'L': 408 Lflag = 1; 409 break; 410 case 'M': 411 memf = optarg; 412 break; 413 case 'm': 414 mflag = 1; 415 break; 416 case 'N': 417 nlistf = optarg; 418 break; 419 case 'n': 420 numeric_addr = numeric_port = 1; 421 break; 422 case 'P': 423 Pflag = 1; 424 break; 425 case 'p': 426 if ((tp = name2protox(optarg)) == NULL) { 427 errx(1, 428 "%s: unknown or uninstrumented protocol", 429 optarg); 430 } 431 pflag = 1; 432 break; 433 case 'r': 434 rflag = 1; 435 break; 436 case 's': 437 ++sflag; 438 break; 439 case 'S': 440 numeric_addr = 1; 441 break; 442 case 'B': 443 Bflag = 1; 444 break; 445 case 't': 446 tflag = 1; 447 break; 448 case 'u': 449 af = AF_UNIX; 450 break; 451 case 'W': 452 case 'l': 453 Wflag = 1; 454 break; 455 case 'w': 456 interval = atoi(optarg); 457 iflag = 1; 458 break; 459 case 'z': 460 zflag = 1; 461 break; 462 case '?': 463 default: 464 usage(); 465 } 466 argv += optind; 467 argc -= optind; 468 469 #define BACKWARD_COMPATIBILITY 470 #ifdef BACKWARD_COMPATIBILITY 471 if (*argv) { 472 if (isdigit(**argv)) { 473 interval = atoi(*argv); 474 if (interval <= 0) 475 usage(); 476 ++argv; 477 iflag = 1; 478 } 479 if (*argv) { 480 nlistf = *argv; 481 if (*++argv) 482 memf = *argv; 483 } 484 } 485 #endif 486 487 /* 488 * Discard setgid privileges if not the running kernel so that bad 489 * guys can't print interesting stuff from kernel memory. 490 */ 491 if (nlistf != NULL || memf != NULL) 492 setgid(getgid()); 493 494 if (mflag) { 495 if (memf != NULL) { 496 if (kread(0, 0, 0) == 0) 497 mbpr(nl[N_MBSTAT].n_value, 498 nl[N_MBTYPES].n_value, 499 nl[N_NMBCLUSTERS].n_value, 500 nl[N_NMBUFS].n_value); 501 } else 502 mbpr(0, 0, 0, 0); 503 exit(0); 504 } 505 #if 0 506 /* 507 * Keep file descriptors open to avoid overhead 508 * of open/close on each call to get* routines. 509 */ 510 sethostent(1); 511 setnetent(1); 512 #else 513 /* 514 * This does not make sense any more with DNS being default over 515 * the files. Doing a setXXXXent(1) causes a tcp connection to be 516 * used for the queries, which is slower. 517 */ 518 #endif 519 if (iflag && !sflag) { 520 kread(0, 0, 0); 521 intpr(interval, nl[N_IFNET].n_value, NULL); 522 exit(0); 523 } 524 if (rflag) { 525 kread(0, 0, 0); 526 if (sflag) 527 rt_stats(); 528 else 529 routepr(nl[N_RTREE].n_value); 530 exit(0); 531 } 532 if (gflag) { 533 kread(0, 0, 0); 534 if (sflag) { 535 if (af == AF_INET || af == AF_UNSPEC) 536 mrt_stats(nl[N_MRTSTAT].n_value); 537 #ifdef INET6 538 if (af == AF_INET6 || af == AF_UNSPEC) 539 mrt6_stats(nl[N_MRT6STAT].n_value); 540 #endif 541 } else { 542 if (af == AF_INET || af == AF_UNSPEC) 543 mroutepr(nl[N_MFCTABLE].n_value, 544 nl[N_VIFTABLE].n_value); 545 #ifdef INET6 546 if (af == AF_INET6 || af == AF_UNSPEC) 547 mroute6pr(nl[N_MF6CTABLE].n_value, 548 nl[N_MIF6TABLE].n_value); 549 #endif 550 } 551 exit(0); 552 } 553 554 kread(0, 0, 0); 555 if (tp) { 556 printproto(tp, tp->pr_name); 557 exit(0); 558 } 559 if (af == AF_INET || af == AF_UNSPEC) 560 for (tp = protox; tp->pr_name; tp++) 561 printproto(tp, tp->pr_name); 562 #ifdef INET6 563 if (af == AF_INET6 || af == AF_UNSPEC) 564 for (tp = ip6protox; tp->pr_name; tp++) 565 printproto(tp, tp->pr_name); 566 #endif /*INET6*/ 567 #ifdef IPSEC 568 if (af == PF_KEY || af == AF_UNSPEC) 569 for (tp = pfkeyprotox; tp->pr_name; tp++) 570 printproto(tp, tp->pr_name); 571 #endif /*IPSEC*/ 572 if (af == AF_IPX || af == AF_UNSPEC) { 573 kread(0, 0, 0); 574 for (tp = ipxprotox; tp->pr_name; tp++) 575 printproto(tp, tp->pr_name); 576 } 577 if (af == AF_APPLETALK || af == AF_UNSPEC) 578 for (tp = atalkprotox; tp->pr_name; tp++) 579 printproto(tp, tp->pr_name); 580 if (af == AF_NETGRAPH || af == AF_UNSPEC) 581 for (tp = netgraphprotox; tp->pr_name; tp++) 582 printproto(tp, tp->pr_name); 583 #ifdef NS 584 if (af == AF_NS || af == AF_UNSPEC) 585 for (tp = nsprotox; tp->pr_name; tp++) 586 printproto(tp, tp->pr_name); 587 #endif 588 #ifdef ISO 589 if (af == AF_ISO || af == AF_UNSPEC) 590 for (tp = isoprotox; tp->pr_name; tp++) 591 printproto(tp, tp->pr_name); 592 #endif 593 if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag) 594 unixpr(); 595 exit(0); 596 } 597 598 /* 599 * Print out protocol statistics or control blocks (per sflag). 600 * If the interface was not specifically requested, and the symbol 601 * is not in the namelist, ignore this one. 602 */ 603 static void 604 printproto(struct protox *tp, char *name) 605 { 606 void (*pr)(u_long, char *, int); 607 u_long off; 608 609 if (sflag) { 610 if (iflag) { 611 if (tp->pr_istats) 612 intpr(interval, nl[N_IFNET].n_value, 613 tp->pr_istats); 614 else if (pflag) 615 printf("%s: no per-interface stats routine\n", 616 tp->pr_name); 617 return; 618 } 619 else { 620 pr = tp->pr_stats; 621 if (!pr) { 622 if (pflag) 623 printf("%s: no stats routine\n", 624 tp->pr_name); 625 return; 626 } 627 off = tp->pr_usesysctl ? tp->pr_usesysctl 628 : nl[tp->pr_sindex].n_value; 629 } 630 } else { 631 pr = tp->pr_cblocks; 632 if (!pr) { 633 if (pflag) 634 printf("%s: no PCB routine\n", tp->pr_name); 635 return; 636 } 637 off = tp->pr_usesysctl ? tp->pr_usesysctl 638 : nl[tp->pr_index].n_value; 639 } 640 if (pr != NULL && (off || af != AF_UNSPEC)) 641 (*pr)(off, name, af); 642 } 643 644 /* 645 * Read kernel memory, return 0 on success. 646 */ 647 int 648 kread(u_long addr, char *buf, int size) 649 { 650 if (kvmd == 0) { 651 /* 652 * XXX. 653 */ 654 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf); 655 if (kvmd != NULL) { 656 if (kvm_nlist(kvmd, nl) < 0) { 657 if(nlistf) 658 errx(1, "%s: kvm_nlist: %s", nlistf, 659 kvm_geterr(kvmd)); 660 else 661 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd)); 662 } 663 664 if (nl[0].n_type == 0) { 665 if(nlistf) 666 errx(1, "%s: no namelist", nlistf); 667 else 668 errx(1, "no namelist"); 669 } 670 } else { 671 warnx("kvm not available"); 672 return(-1); 673 } 674 } 675 if (!buf) 676 return (0); 677 if (kvm_read(kvmd, addr, buf, size) != size) { 678 warnx("%s", kvm_geterr(kvmd)); 679 return (-1); 680 } 681 return (0); 682 } 683 684 char * 685 plural(int n) 686 { 687 return (n != 1 ? "s" : ""); 688 } 689 690 char * 691 plurales(int n) 692 { 693 return (n != 1 ? "es" : ""); 694 } 695 696 /* 697 * Find the protox for the given "well-known" name. 698 */ 699 static struct protox * 700 knownname(char *name) 701 { 702 struct protox **tpp, *tp; 703 704 for (tpp = protoprotox; *tpp; tpp++) 705 for (tp = *tpp; tp->pr_name; tp++) 706 if (strcmp(tp->pr_name, name) == 0) 707 return (tp); 708 return (NULL); 709 } 710 711 /* 712 * Find the protox corresponding to name. 713 */ 714 static struct protox * 715 name2protox(char *name) 716 { 717 struct protox *tp; 718 char **alias; /* alias from p->aliases */ 719 struct protoent *p; 720 721 /* 722 * Try to find the name in the list of "well-known" names. If that 723 * fails, check if name is an alias for an Internet protocol. 724 */ 725 if ((tp = knownname(name)) != NULL) 726 return (tp); 727 728 setprotoent(1); /* make protocol lookup cheaper */ 729 while ((p = getprotoent()) != NULL) { 730 /* assert: name not same as p->name */ 731 for (alias = p->p_aliases; *alias; alias++) 732 if (strcmp(name, *alias) == 0) { 733 endprotoent(); 734 return (knownname(p->p_name)); 735 } 736 } 737 endprotoent(); 738 return (NULL); 739 } 740 741 static void 742 usage(void) 743 { 744 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", 745 "usage: netstat [-AaLnSW] [-c cpu] [-f protocol_family | -p protocol]\n" 746 " [-M core] [-N system]", 747 " netstat -i | -I interface [-abdnt] [-f address_family]\n" 748 " [-M core] [-N system]", 749 " netstat -w wait [-I interface] [-d] [-M core] [-N system]", 750 " netstat -s [-s] [-z] [-f protocol_family | -p protocol] [-M core]", 751 " netstat -i | -I interface -s [-f protocol_family | -p protocol]\n" 752 " [-M core] [-N system]", 753 " netstat -m [-M core] [-N system]", 754 " netstat -r [-AanW] [-f address_family] [-M core] [-N system]", 755 " netstat -rs [-s] [-M core] [-N system]", 756 " netstat -g [-W] [-f address_family] [-M core] [-N system]", 757 " netstat -gs [-s] [-f address_family] [-M core] [-N system]"); 758 exit(1); 759 } 760