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_MBLIM 42 157 { "_mbuf_limit" }, 158 #define N_CLLIM 43 159 { "_clust_limit" }, 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 { "" }, 169 }; 170 171 struct protox { 172 u_char pr_index; /* index into nlist of cb head */ 173 u_char pr_sindex; /* index into nlist of stat block */ 174 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 175 void (*pr_cblocks)(u_long, char *, int); 176 /* control blocks printing routine */ 177 void (*pr_stats)(u_long, char *, int); 178 /* statistics printing routine */ 179 void (*pr_istats)(char *); /* per/if statistics printing routine */ 180 char *pr_name; /* well-known name */ 181 int pr_usesysctl; /* true if we use sysctl, not kvm */ 182 } protox[] = { 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, -1, 1, protopr, 188 NULL, NULL, "divert",IPPROTO_DIVERT }, 189 { -1, -1, 1, protopr, 190 ip_stats, NULL, "ip", IPPROTO_RAW }, 191 { -1, -1, 1, protopr, 192 icmp_stats, NULL, "icmp", IPPROTO_ICMP }, 193 { -1, -1, 1, protopr, 194 igmp_stats, NULL, "igmp", IPPROTO_IGMP }, 195 #ifdef IPSEC 196 { -1, N_IPSECSTAT, 1, 0, 197 ipsec_stats, NULL, "ipsec", 0}, 198 #endif 199 { -1, -1, 1, 0, 200 bdg_stats, NULL, "bdg", 1 /* bridging... */ }, 201 { -1, -1, 0, 0, 202 0, NULL, 0 } 203 }; 204 205 #ifdef INET6 206 struct protox ip6protox[] = { 207 { -1, -1, 1, protopr, 208 tcp_stats, NULL, "tcp", IPPROTO_TCP }, 209 { -1, -1, 1, protopr, 210 udp_stats, NULL, "udp", IPPROTO_UDP }, 211 { -1, N_IP6STAT, 1, protopr, 212 ip6_stats, ip6_ifstats, "ip6", IPPROTO_RAW }, 213 { -1, N_ICMP6STAT, 1, protopr, 214 icmp6_stats, icmp6_ifstats, "icmp6",IPPROTO_ICMPV6 }, 215 #ifdef IPSEC 216 { -1, N_IPSEC6STAT, 1, 0, 217 ipsec_stats, NULL, "ipsec6",0 }, 218 #endif 219 #ifdef notyet 220 { -1, N_PIM6STAT, 1, 0, 221 pim6_stats, NULL, "pim6", 0 }, 222 #endif 223 { -1, -1, 1, 0, 224 rip6_stats, NULL, "rip6", 0 }, 225 { -1, -1, 1, 0, 226 bdg_stats, NULL, "bdg", 1 /* bridging... */ }, 227 { -1, -1, 0, 0, 228 0, NULL, 0, 0 } 229 }; 230 #endif /*INET6*/ 231 232 #ifdef IPSEC 233 struct protox pfkeyprotox[] = { 234 { -1, N_PFKEYSTAT, 1, 0, 235 pfkey_stats, NULL, "pfkey", 0 }, 236 { -1, -1, 0, 0, 237 0, NULL, 0, 0 } 238 }; 239 #endif 240 241 struct protox atalkprotox[] = { 242 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, 243 ddp_stats, NULL, "ddp" }, 244 { -1, -1, 0, 0, 245 0, NULL, 0 } 246 }; 247 248 struct protox netgraphprotox[] = { 249 { N_NGSOCKS, -1, 1, netgraphprotopr, 250 NULL, NULL, "ctrl" }, 251 { N_NGSOCKS, -1, 1, netgraphprotopr, 252 NULL, NULL, "data" }, 253 { -1, NULL, 0, 0, 254 0, NULL, 0 } 255 }; 256 257 struct protox ipxprotox[] = { 258 { N_IPX, N_IPXSTAT, 1, ipxprotopr, 259 ipx_stats, NULL, "ipx", 0 }, 260 { N_IPX, N_SPXSTAT, 1, ipxprotopr, 261 spx_stats, NULL, "spx", 0 }, 262 { -1, -1, 0, 0, 263 0, NULL, 0, 0 } 264 }; 265 266 #ifdef NS 267 struct protox nsprotox[] = { 268 { N_IDP, N_IDPSTAT, 1, nsprotopr, 269 idp_stats, NULL, "idp" }, 270 { N_IDP, N_SPPSTAT, 1, nsprotopr, 271 spp_stats, NULL, "spp" }, 272 { -1, N_NSERR, 1, 0, 273 nserr_stats, NULL, "ns_err" }, 274 { -1, -1, 0, 0, 275 0, NULL, 0 } 276 }; 277 #endif 278 279 #ifdef ISO 280 struct protox isoprotox[] = { 281 { ISO_TP, N_TPSTAT, 1, iso_protopr, 282 tp_stats, NULL, "tp" }, 283 { N_CLTP, N_CLTPSTAT, 1, iso_protopr, 284 cltp_stats, NULL, "cltp" }, 285 { -1, N_CLNPSTAT, 1, 0, 286 clnp_stats, NULL, "clnp"}, 287 { -1, N_ESISSTAT, 1, 0, 288 esis_stats, NULL, "esis"}, 289 { -1, -1, 0, 0, 290 0, NULL, 0 } 291 }; 292 #endif 293 294 struct protox *protoprotox[] = { 295 protox, 296 #ifdef INET6 297 ip6protox, 298 #endif 299 #ifdef IPSEC 300 pfkeyprotox, 301 #endif 302 ipxprotox, atalkprotox, 303 #ifdef NS 304 nsprotox, 305 #endif 306 #ifdef ISO 307 isoprotox, 308 #endif 309 NULL }; 310 311 static void printproto (struct protox *, char *); 312 static void usage (void); 313 static struct protox *name2protox (char *); 314 static struct protox *knownname (char *); 315 316 static kvm_t *kvmd; 317 static char *nlistf = NULL, *memf = NULL; 318 319 int Aflag; /* show addresses of protocol control block */ 320 int aflag; /* show all sockets (including servers) */ 321 int bflag; /* show i/f total bytes in/out */ 322 int dflag; /* show i/f dropped packets */ 323 int gflag; /* show group (multicast) routing or stats */ 324 int iflag; /* show interfaces */ 325 int lflag; /* show routing table with use and ref */ 326 int Lflag; /* show size of listen queues */ 327 int mflag; /* show memory stats */ 328 int numeric_addr; /* show addresses numerically */ 329 int numeric_port; /* show ports numerically */ 330 static int pflag; /* show given protocol */ 331 int rflag; /* show routing tables (or routing stats) */ 332 int sflag; /* show protocol statistics */ 333 int tflag; /* show i/f watchdog timers */ 334 int Wflag; /* wide display */ 335 int zflag; /* zero stats */ 336 337 int interval; /* repeat interval for i/f stats */ 338 339 char *interface; /* desired i/f for stats, or NULL for all i/fs */ 340 int unit; /* unit number for above */ 341 342 int af; /* address family */ 343 344 int 345 main(argc, argv) 346 int argc; 347 char *argv[]; 348 { 349 register struct protox *tp = NULL; /* for printing cblocks & stats */ 350 int ch; 351 352 af = AF_UNSPEC; 353 354 while ((ch = getopt(argc, argv, "Aabdf:gI:iLlM:mN:np:rSstuWw:z")) != -1) 355 switch(ch) { 356 case 'A': 357 Aflag = 1; 358 break; 359 case 'a': 360 aflag = 1; 361 break; 362 case 'b': 363 bflag = 1; 364 break; 365 case 'd': 366 dflag = 1; 367 break; 368 case 'f': 369 #ifdef NS 370 if (strcmp(optarg, "ns") == 0) 371 af = AF_NS; 372 else 373 #endif 374 if (strcmp(optarg, "ipx") == 0) 375 af = AF_IPX; 376 else if (strcmp(optarg, "inet") == 0) 377 af = AF_INET; 378 #ifdef INET6 379 else if (strcmp(optarg, "inet6") == 0) 380 af = AF_INET6; 381 #endif /*INET6*/ 382 #ifdef INET6 383 else if (strcmp(optarg, "pfkey") == 0) 384 af = PF_KEY; 385 #endif /*INET6*/ 386 else if (strcmp(optarg, "unix") == 0) 387 af = AF_UNIX; 388 else if (strcmp(optarg, "atalk") == 0) 389 af = AF_APPLETALK; 390 else if (strcmp(optarg, "ng") == 0 391 || strcmp(optarg, "netgraph") == 0) 392 af = AF_NETGRAPH; 393 #ifdef ISO 394 else if (strcmp(optarg, "iso") == 0) 395 af = AF_ISO; 396 #endif 397 else { 398 errx(1, "%s: unknown address family", optarg); 399 } 400 break; 401 case 'g': 402 gflag = 1; 403 break; 404 case 'I': { 405 char *cp; 406 407 iflag = 1; 408 for (cp = interface = optarg; isalpha(*cp); cp++) 409 continue; 410 unit = atoi(cp); 411 break; 412 } 413 case 'i': 414 iflag = 1; 415 break; 416 case 'l': 417 lflag = 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 Wflag = 1; 459 break; 460 case 'w': 461 interval = atoi(optarg); 462 iflag = 1; 463 break; 464 case 'z': 465 zflag = 1; 466 break; 467 case '?': 468 default: 469 usage(); 470 } 471 argv += optind; 472 argc -= optind; 473 474 #define BACKWARD_COMPATIBILITY 475 #ifdef BACKWARD_COMPATIBILITY 476 if (*argv) { 477 if (isdigit(**argv)) { 478 interval = atoi(*argv); 479 if (interval <= 0) 480 usage(); 481 ++argv; 482 iflag = 1; 483 } 484 if (*argv) { 485 nlistf = *argv; 486 if (*++argv) 487 memf = *argv; 488 } 489 } 490 #endif 491 492 /* 493 * Discard setgid privileges if not the running kernel so that bad 494 * guys can't print interesting stuff from kernel memory. 495 */ 496 if (nlistf != NULL || memf != NULL) 497 setgid(getgid()); 498 499 if (mflag) { 500 if (memf != NULL) { 501 if (kread(0, 0, 0) == 0) 502 mbpr(nl[N_MBSTAT].n_value, 503 nl[N_MBTYPES].n_value, 504 nl[N_NMBCLUSTERS].n_value, 505 nl[N_NMBUFS].n_value, 506 nl[N_MBLIM].n_value, 507 nl[N_CLLIM].n_value, 508 nl[N_NCPUS].n_value, 509 nl[N_PAGESZ].n_value, 510 nl[N_MBPSTAT].n_value); 511 } else 512 mbpr(0, 0, 0, 0, 0, 0, 0, 0, 0); 513 exit(0); 514 } 515 #if 0 516 /* 517 * Keep file descriptors open to avoid overhead 518 * of open/close on each call to get* routines. 519 */ 520 sethostent(1); 521 setnetent(1); 522 #else 523 /* 524 * This does not make sense any more with DNS being default over 525 * the files. Doing a setXXXXent(1) causes a tcp connection to be 526 * used for the queries, which is slower. 527 */ 528 #endif 529 if (iflag && !sflag) { 530 kread(0, 0, 0); 531 intpr(interval, nl[N_IFNET].n_value, NULL); 532 exit(0); 533 } 534 if (rflag) { 535 kread(0, 0, 0); 536 if (sflag) 537 rt_stats(nl[N_RTSTAT].n_value, nl[N_RTTRASH].n_value); 538 else 539 routepr(nl[N_RTREE].n_value); 540 exit(0); 541 } 542 if (gflag) { 543 kread(0, 0, 0); 544 if (sflag) { 545 if (af == AF_INET || af == AF_UNSPEC) 546 mrt_stats(nl[N_MRTSTAT].n_value); 547 #ifdef INET6 548 if (af == AF_INET6 || af == AF_UNSPEC) 549 mrt6_stats(nl[N_MRT6STAT].n_value); 550 #endif 551 } else { 552 if (af == AF_INET || af == AF_UNSPEC) 553 mroutepr(nl[N_MFCTABLE].n_value, 554 nl[N_VIFTABLE].n_value); 555 #ifdef INET6 556 if (af == AF_INET6 || af == AF_UNSPEC) 557 mroute6pr(nl[N_MF6CTABLE].n_value, 558 nl[N_MIF6TABLE].n_value); 559 #endif 560 } 561 exit(0); 562 } 563 564 kread(0, 0, 0); 565 if (tp) { 566 printproto(tp, tp->pr_name); 567 exit(0); 568 } 569 if (af == AF_INET || af == AF_UNSPEC) 570 for (tp = protox; tp->pr_name; tp++) 571 printproto(tp, tp->pr_name); 572 #ifdef INET6 573 if (af == AF_INET6 || af == AF_UNSPEC) 574 for (tp = ip6protox; tp->pr_name; tp++) 575 printproto(tp, tp->pr_name); 576 #endif /*INET6*/ 577 #ifdef IPSEC 578 if (af == PF_KEY || af == AF_UNSPEC) 579 for (tp = pfkeyprotox; tp->pr_name; tp++) 580 printproto(tp, tp->pr_name); 581 #endif /*IPSEC*/ 582 if (af == AF_IPX || af == AF_UNSPEC) { 583 kread(0, 0, 0); 584 for (tp = ipxprotox; tp->pr_name; tp++) 585 printproto(tp, tp->pr_name); 586 } 587 if (af == AF_APPLETALK || af == AF_UNSPEC) 588 for (tp = atalkprotox; tp->pr_name; tp++) 589 printproto(tp, tp->pr_name); 590 if (af == AF_NETGRAPH || af == AF_UNSPEC) 591 for (tp = netgraphprotox; tp->pr_name; tp++) 592 printproto(tp, tp->pr_name); 593 #ifdef NS 594 if (af == AF_NS || af == AF_UNSPEC) 595 for (tp = nsprotox; tp->pr_name; tp++) 596 printproto(tp, tp->pr_name); 597 #endif 598 #ifdef ISO 599 if (af == AF_ISO || af == AF_UNSPEC) 600 for (tp = isoprotox; tp->pr_name; tp++) 601 printproto(tp, tp->pr_name); 602 #endif 603 if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag) 604 unixpr(); 605 exit(0); 606 } 607 608 /* 609 * Print out protocol statistics or control blocks (per sflag). 610 * If the interface was not specifically requested, and the symbol 611 * is not in the namelist, ignore this one. 612 */ 613 static void 614 printproto(tp, name) 615 register struct protox *tp; 616 char *name; 617 { 618 void (*pr)(u_long, char *, int); 619 u_long off; 620 621 if (sflag) { 622 if (iflag) { 623 if (tp->pr_istats) 624 intpr(interval, nl[N_IFNET].n_value, 625 tp->pr_istats); 626 else if (pflag) 627 printf("%s: no per-interface stats routine\n", 628 tp->pr_name); 629 return; 630 } 631 else { 632 pr = tp->pr_stats; 633 if (!pr) { 634 if (pflag) 635 printf("%s: no stats routine\n", 636 tp->pr_name); 637 return; 638 } 639 off = tp->pr_usesysctl ? tp->pr_usesysctl 640 : nl[tp->pr_sindex].n_value; 641 } 642 } else { 643 pr = tp->pr_cblocks; 644 if (!pr) { 645 if (pflag) 646 printf("%s: no PCB routine\n", tp->pr_name); 647 return; 648 } 649 off = tp->pr_usesysctl ? tp->pr_usesysctl 650 : nl[tp->pr_index].n_value; 651 } 652 if (pr != NULL && (off || af != AF_UNSPEC)) 653 (*pr)(off, name, af); 654 } 655 656 /* 657 * Read kernel memory, return 0 on success. 658 */ 659 int 660 kread(u_long addr, char *buf, int size) 661 { 662 if (kvmd == 0) { 663 /* 664 * XXX. 665 */ 666 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf); 667 if (kvmd != NULL) { 668 if (kvm_nlist(kvmd, nl) < 0) { 669 if(nlistf) 670 errx(1, "%s: kvm_nlist: %s", nlistf, 671 kvm_geterr(kvmd)); 672 else 673 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd)); 674 } 675 676 if (nl[0].n_type == 0) { 677 if(nlistf) 678 errx(1, "%s: no namelist", nlistf); 679 else 680 errx(1, "no namelist"); 681 } 682 } else { 683 warnx("kvm not available"); 684 return(-1); 685 } 686 } 687 if (!buf) 688 return (0); 689 if (kvm_read(kvmd, addr, buf, size) != size) { 690 warnx("%s", kvm_geterr(kvmd)); 691 return (-1); 692 } 693 return (0); 694 } 695 696 char * 697 plural(int n) 698 { 699 return (n != 1 ? "s" : ""); 700 } 701 702 char * 703 plurales(int n) 704 { 705 return (n != 1 ? "es" : ""); 706 } 707 708 /* 709 * Find the protox for the given "well-known" name. 710 */ 711 static struct protox * 712 knownname(char *name) 713 { 714 struct protox **tpp, *tp; 715 716 for (tpp = protoprotox; *tpp; tpp++) 717 for (tp = *tpp; tp->pr_name; tp++) 718 if (strcmp(tp->pr_name, name) == 0) 719 return (tp); 720 return (NULL); 721 } 722 723 /* 724 * Find the protox corresponding to name. 725 */ 726 static struct protox * 727 name2protox(char *name) 728 { 729 struct protox *tp; 730 char **alias; /* alias from p->aliases */ 731 struct protoent *p; 732 733 /* 734 * Try to find the name in the list of "well-known" names. If that 735 * fails, check if name is an alias for an Internet protocol. 736 */ 737 if ((tp = knownname(name)) != NULL) 738 return (tp); 739 740 setprotoent(1); /* make protocol lookup cheaper */ 741 while ((p = getprotoent()) != NULL) { 742 /* assert: name not same as p->name */ 743 for (alias = p->p_aliases; *alias; alias++) 744 if (strcmp(name, *alias) == 0) { 745 endprotoent(); 746 return (knownname(p->p_name)); 747 } 748 } 749 endprotoent(); 750 return (NULL); 751 } 752 753 static void 754 usage(void) 755 { 756 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n", 757 "usage: netstat [-AaLlnW] [-f address_family] [-M core] [-N system]", 758 " netstat [-abdgilnrsS] [-f address_family] [-M core] [-N system]", 759 " netstat [-bdn] [-I interface] [-M core] [-N system] [-w wait]", 760 " netstat -m [-M core] [-N system]", 761 " netstat [-M core] [-N system] [-p protocol]"); 762 exit(1); 763 } 764