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 1.16 2008/07/11 23:09:18 thomas 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 { .n_name = "_ifnet" }, 65 #define N_IMP 1 66 { .n_name = "_imp_softc" }, 67 #define N_RTSTAT 2 68 { .n_name = "_rtstat" }, 69 #define N_UNIXSW 3 70 { .n_name = "_localsw" }, 71 #define N_IDP 4 72 { .n_name = "_nspcb"}, 73 #define N_IDPSTAT 5 74 { .n_name = "_idpstat"}, 75 #define N_SPPSTAT 6 76 { .n_name = "_spp_istat"}, 77 #define N_NSERR 7 78 { .n_name = "_ns_errstat"}, 79 #define N_CLNPSTAT 8 80 { .n_name = "_clnp_stat"}, 81 #define IN_NOTUSED 9 82 { .n_name = "_tp_inpcb" }, 83 #define ISO_TP 10 84 { .n_name = "_tp_refinfo" }, 85 #define N_TPSTAT 11 86 { .n_name = "_tp_stat" }, 87 #define N_ESISSTAT 12 88 { .n_name = "_esis_stat"}, 89 #define N_NIMP 13 90 { .n_name = "_nimp"}, 91 #define N_RTREE 14 92 { .n_name = "_rt_tables"}, 93 #define N_CLTP 15 94 { .n_name = "_cltb"}, 95 #define N_CLTPSTAT 16 96 { .n_name = "_cltpstat"}, 97 #define N_NFILE 17 98 { .n_name = "_nfile" }, 99 #define N_FILE 18 100 { .n_name = "_file" }, 101 #define N_MRTSTAT 19 102 { .n_name = "_mrtstat" }, 103 #define N_MFCTABLE 20 104 { .n_name = "_mfctable" }, 105 #define N_VIFTABLE 21 106 { .n_name = "_viftable" }, 107 #define N_IPX 22 108 { .n_name = "_ipxpcb"}, 109 #define N_IPXSTAT 23 110 { .n_name = "_ipxstat"}, 111 #define N_SPXSTAT 24 112 { .n_name = "_spx_istat"}, 113 #define N_DDPSTAT 25 114 { .n_name = "_ddpstat"}, 115 #define N_DDPCB 26 116 { .n_name = "_ddpcb"}, 117 #define N_NGSOCKS 27 118 { .n_name = "_ngsocklist"}, 119 #define N_IP6STAT 28 120 { .n_name = "_ip6stat" }, 121 #define N_ICMP6STAT 29 122 { .n_name = "_icmp6stat" }, 123 #define N_IPSECSTAT 30 124 { .n_name = "_ipsecstat" }, 125 #define N_IPSEC6STAT 31 126 { .n_name = "_ipsec6stat" }, 127 #define N_PIM6STAT 32 128 { .n_name = "_pim6stat" }, 129 #define N_MRT6PROTO 33 130 { .n_name = "_ip6_mrtproto" }, 131 #define N_MRT6STAT 34 132 { .n_name = "_mrt6stat" }, 133 #define N_MF6CTABLE 35 134 { .n_name = "_mf6ctable" }, 135 #define N_MIF6TABLE 36 136 { .n_name = "_mif6table" }, 137 #define N_PFKEYSTAT 37 138 { .n_name = "_pfkeystat" }, 139 #define N_MBSTAT 38 140 { .n_name = "_mbstat" }, 141 #define N_MBTYPES 39 142 { .n_name = "_mbtypes" }, 143 #define N_NMBCLUSTERS 40 144 { .n_name = "_nmbclusters" }, 145 #define N_NMBUFS 41 146 { .n_name = "_nmbufs" }, 147 #define N_RTTRASH 42 148 { .n_name = "_rttrash" }, 149 #define N_NCPUS 43 150 { .n_name = "_ncpus" }, 151 #define N_CARPSTAT 44 152 { .n_name = "_carpstats" }, 153 { .n_name = NULL }, 154 }; 155 156 struct protox { 157 u_char pr_index; /* index into nlist of cb head */ 158 u_char pr_sindex; /* index into nlist of stat block */ 159 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 160 void (*pr_cblocks)(u_long, const char *, int); 161 /* control blocks printing routine */ 162 void (*pr_stats)(u_long, const char *, int); 163 /* statistics printing routine */ 164 void (*pr_istats)(char *); /* per/if statistics printing routine */ 165 const char *pr_name; /* well-known name */ 166 u_int pr_usesysctl; /* true if we use sysctl, not kvm */ 167 } protox[] = { 168 { -1, -1, 1, protopr, 169 tcp_stats, NULL, "tcp", IPPROTO_TCP }, 170 { -1, -1, 1, protopr, 171 udp_stats, NULL, "udp", IPPROTO_UDP }, 172 { -1, -1, 1, protopr, 173 NULL, NULL, "divert",IPPROTO_DIVERT }, 174 { -1, -1, 1, protopr, 175 ip_stats, NULL, "ip", IPPROTO_RAW }, 176 { -1, -1, 1, protopr, 177 icmp_stats, NULL, "icmp", IPPROTO_ICMP }, 178 { -1, -1, 1, protopr, 179 igmp_stats, NULL, "igmp", IPPROTO_IGMP }, 180 #ifdef IPSEC 181 { -1, N_IPSECSTAT, 1, 0, 182 ipsec_stats, NULL, "ipsec", 0}, 183 #endif 184 { -1, N_CARPSTAT, 1, 0, 185 carp_stats, NULL, "carp", 0}, 186 { -1, -1, 0, 0, 187 0, NULL, NULL, 0} 188 }; 189 190 #ifdef INET6 191 struct protox ip6protox[] = { 192 { -1, -1, 1, protopr, 193 tcp_stats, NULL, "tcp", IPPROTO_TCP }, 194 { -1, -1, 1, protopr, 195 udp_stats, NULL, "udp", IPPROTO_UDP }, 196 { -1, N_IP6STAT, 1, protopr, 197 ip6_stats, ip6_ifstats, "ip6", IPPROTO_RAW }, 198 { -1, N_ICMP6STAT, 1, protopr, 199 icmp6_stats, icmp6_ifstats, "icmp6",IPPROTO_ICMPV6 }, 200 #ifdef IPSEC 201 { -1, N_IPSEC6STAT, 1, 0, 202 ipsec_stats, NULL, "ipsec6",0 }, 203 #endif 204 #ifdef notyet 205 { -1, N_PIM6STAT, 1, 0, 206 pim6_stats, NULL, "pim6", 0 }, 207 #endif 208 { -1, -1, 1, 0, 209 rip6_stats, NULL, "rip6", 0 }, 210 { -1, -1, 1, protopr, 211 pim_stats, NULL, "pim", IPPROTO_PIM }, 212 { -1, -1, 0, 0, 213 0, NULL, 0, 0 } 214 }; 215 #endif /*INET6*/ 216 217 #ifdef IPSEC 218 struct protox pfkeyprotox[] = { 219 { -1, N_PFKEYSTAT, 1, 0, 220 pfkey_stats, NULL, "pfkey", 0 }, 221 { -1, -1, 0, 0, 222 0, NULL, 0, 0 } 223 }; 224 #endif 225 226 struct protox atalkprotox[] = { 227 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, 228 ddp_stats, NULL, "ddp", 0 }, 229 { -1, -1, 0, 0, 230 0, NULL, NULL, 0 } 231 }; 232 233 struct protox netgraphprotox[] = { 234 { N_NGSOCKS, -1, 1, netgraphprotopr, 235 NULL, NULL, "ctrl", 0 }, 236 { N_NGSOCKS, -1, 1, netgraphprotopr, 237 NULL, NULL, "data", 0 }, 238 { -1, -1, 0, 0, 239 0, NULL, NULL, 0 } 240 }; 241 242 struct protox ipxprotox[] = { 243 { N_IPX, N_IPXSTAT, 1, ipxprotopr, 244 ipx_stats, NULL, "ipx", 0 }, 245 { N_IPX, N_SPXSTAT, 1, ipxprotopr, 246 spx_stats, NULL, "spx", 0 }, 247 { -1, -1, 0, 0, 248 0, NULL, 0, 0 } 249 }; 250 251 #ifdef ISO 252 struct protox isoprotox[] = { 253 { ISO_TP, N_TPSTAT, 1, iso_protopr, 254 tp_stats, NULL, "tp" }, 255 { N_CLTP, N_CLTPSTAT, 1, iso_protopr, 256 cltp_stats, NULL, "cltp" }, 257 { -1, N_CLNPSTAT, 1, 0, 258 clnp_stats, NULL, "clnp"}, 259 { -1, N_ESISSTAT, 1, 0, 260 esis_stats, NULL, "esis"}, 261 { -1, -1, 0, 0, 262 0, NULL, 0 } 263 }; 264 #endif 265 266 struct protox *protoprotox[] = { 267 protox, 268 #ifdef INET6 269 ip6protox, 270 #endif 271 #ifdef IPSEC 272 pfkeyprotox, 273 #endif 274 ipxprotox, atalkprotox, 275 #ifdef ISO 276 isoprotox, 277 #endif 278 NULL }; 279 280 static void printproto (struct protox *, const char *); 281 static void usage (void); 282 static struct protox *name2protox (char *); 283 static struct protox *knownname (char *); 284 285 static kvm_t *kvmd; 286 static char *nlistf = NULL, *memf = NULL; 287 288 int Aflag; /* show addresses of protocol control block */ 289 int aflag; /* show all sockets (including servers) */ 290 int bflag; /* show i/f total bytes in/out */ 291 int cpuflag = -1; /* dump route table from specific cpu */ 292 int dflag; /* show i/f dropped packets */ 293 int gflag; /* show group (multicast) routing or stats */ 294 int iflag; /* show interfaces */ 295 int Lflag; /* show size of listen queues */ 296 int mflag; /* show memory stats */ 297 int Pflag; /* show more protocol info (go past 80 columns) */ 298 int numeric_addr; /* show addresses numerically */ 299 int numeric_port; /* show ports numerically */ 300 static int pflag; /* show given protocol */ 301 int rflag; /* show routing tables (or routing stats) */ 302 int sflag; /* show protocol statistics */ 303 int tflag; /* show i/f watchdog timers */ 304 int Bflag; /* show buffer limit instead of buffer use */ 305 int Wflag; /* wide display */ 306 int zflag; /* zero stats */ 307 308 int interval; /* repeat interval for i/f stats */ 309 310 char *interface; /* desired i/f for stats, or NULL for all i/fs */ 311 int unit; /* unit number for above */ 312 313 int af; /* address family */ 314 315 int 316 main(int argc, char **argv) 317 { 318 struct protox *tp = NULL; /* for printing cblocks & stats */ 319 int ch; 320 int n; 321 322 af = AF_UNSPEC; 323 324 while ((ch = getopt(argc, argv, "Aabc:df:gI:iLlM:mN:nPp:rSsBtuWw:z")) != -1) 325 switch(ch) { 326 case 'A': 327 Aflag = 1; 328 break; 329 case 'a': 330 aflag = 1; 331 break; 332 case 'b': 333 bflag = 1; 334 break; 335 case 'c': 336 kread(0, 0, 0); 337 kread(nl[N_NCPUS].n_value, (char *)&n, sizeof(n)); 338 cpuflag = strtol(optarg, NULL, 0); 339 if (cpuflag < 0 || cpuflag >= n) 340 errx(1, "cpu %d does not exist", cpuflag); 341 break; 342 case 'd': 343 dflag = 1; 344 break; 345 case 'f': 346 if (strcmp(optarg, "ipx") == 0) 347 af = AF_IPX; 348 else if (strcmp(optarg, "inet") == 0) 349 af = AF_INET; 350 #ifdef INET6 351 else if (strcmp(optarg, "inet6") == 0) 352 af = AF_INET6; 353 #endif /*INET6*/ 354 #ifdef INET6 355 else if (strcmp(optarg, "pfkey") == 0) 356 af = PF_KEY; 357 #endif /*INET6*/ 358 else if (strcmp(optarg, "unix") == 0) 359 af = AF_UNIX; 360 else if (strcmp(optarg, "atalk") == 0) 361 af = AF_APPLETALK; 362 else if (strcmp(optarg, "ng") == 0 363 || strcmp(optarg, "netgraph") == 0) 364 af = AF_NETGRAPH; 365 #ifdef ISO 366 else if (strcmp(optarg, "iso") == 0) 367 af = AF_ISO; 368 #endif 369 else if (strcmp(optarg, "link") == 0) 370 af = AF_LINK; 371 else if (strcmp(optarg, "mpls") == 0) 372 af = AF_MPLS; 373 else { 374 errx(1, "%s: unknown address family", optarg); 375 } 376 break; 377 case 'g': 378 gflag = 1; 379 break; 380 case 'I': { 381 char *cp; 382 383 iflag = 1; 384 for (cp = interface = optarg; isalpha(*cp); cp++) 385 continue; 386 unit = atoi(cp); 387 break; 388 } 389 case 'i': 390 iflag = 1; 391 break; 392 case 'L': 393 Lflag = 1; 394 break; 395 case 'M': 396 memf = optarg; 397 break; 398 case 'm': 399 mflag = 1; 400 break; 401 case 'N': 402 nlistf = optarg; 403 break; 404 case 'n': 405 numeric_addr = numeric_port = 1; 406 break; 407 case 'P': 408 Pflag = 1; 409 break; 410 case 'p': 411 if ((tp = name2protox(optarg)) == NULL) { 412 errx(1, 413 "%s: unknown or uninstrumented protocol", 414 optarg); 415 } 416 pflag = 1; 417 break; 418 case 'r': 419 rflag = 1; 420 break; 421 case 's': 422 ++sflag; 423 break; 424 case 'S': 425 numeric_addr = 1; 426 break; 427 case 'B': 428 Bflag = 1; 429 break; 430 case 't': 431 tflag = 1; 432 break; 433 case 'u': 434 af = AF_UNIX; 435 break; 436 case 'W': 437 case 'l': 438 Wflag = 1; 439 break; 440 case 'w': 441 interval = atoi(optarg); 442 iflag = 1; 443 break; 444 case 'z': 445 zflag = 1; 446 break; 447 case '?': 448 default: 449 usage(); 450 } 451 argv += optind; 452 argc -= optind; 453 454 #define BACKWARD_COMPATIBILITY 455 #ifdef BACKWARD_COMPATIBILITY 456 if (*argv) { 457 if (isdigit(**argv)) { 458 interval = atoi(*argv); 459 if (interval <= 0) 460 usage(); 461 ++argv; 462 iflag = 1; 463 } 464 if (*argv) { 465 nlistf = *argv; 466 if (*++argv) 467 memf = *argv; 468 } 469 } 470 #endif 471 472 /* 473 * Discard setgid privileges if not the running kernel so that bad 474 * guys can't print interesting stuff from kernel memory. 475 */ 476 if (nlistf != NULL || memf != NULL) 477 setgid(getgid()); 478 479 if (mflag) { 480 if (memf != NULL) { 481 if (kread(0, 0, 0) == 0) 482 mbpr(nl[N_MBSTAT].n_value, 483 nl[N_MBTYPES].n_value, 484 nl[N_NMBCLUSTERS].n_value, 485 nl[N_NMBUFS].n_value, 486 nl[N_NCPUS].n_value); 487 } else { 488 mbpr(0, 0, 0, 0, 0); 489 } 490 exit(0); 491 } 492 #if 0 493 /* 494 * Keep file descriptors open to avoid overhead 495 * of open/close on each call to get* routines. 496 */ 497 sethostent(1); 498 setnetent(1); 499 #else 500 /* 501 * This does not make sense any more with DNS being default over 502 * the files. Doing a setXXXXent(1) causes a tcp connection to be 503 * used for the queries, which is slower. 504 */ 505 #endif 506 if (iflag && !sflag) { 507 kread(0, 0, 0); 508 intpr(interval, nl[N_IFNET].n_value, NULL); 509 exit(0); 510 } 511 if (rflag) { 512 kread(0, 0, 0); 513 if (sflag) 514 rt_stats(); 515 else 516 routepr(nl[N_RTREE].n_value); 517 exit(0); 518 } 519 if (gflag) { 520 kread(0, 0, 0); 521 if (sflag) { 522 if (af == AF_INET || af == AF_UNSPEC) 523 mrt_stats(nl[N_MRTSTAT].n_value); 524 #ifdef INET6 525 if (af == AF_INET6 || af == AF_UNSPEC) 526 mrt6_stats(nl[N_MRT6STAT].n_value); 527 #endif 528 } else { 529 if (af == AF_INET || af == AF_UNSPEC) 530 mroutepr(nl[N_MFCTABLE].n_value, 531 nl[N_VIFTABLE].n_value); 532 #ifdef INET6 533 if (af == AF_INET6 || af == AF_UNSPEC) 534 mroute6pr(nl[N_MF6CTABLE].n_value, 535 nl[N_MIF6TABLE].n_value); 536 #endif 537 } 538 exit(0); 539 } 540 541 kread(0, 0, 0); 542 if (tp) { 543 printproto(tp, tp->pr_name); 544 exit(0); 545 } 546 if (af == AF_INET || af == AF_UNSPEC) 547 for (tp = protox; tp->pr_name; tp++) 548 printproto(tp, tp->pr_name); 549 #ifdef INET6 550 if (af == AF_INET6 || af == AF_UNSPEC) 551 for (tp = ip6protox; tp->pr_name; tp++) 552 printproto(tp, tp->pr_name); 553 #endif /*INET6*/ 554 #ifdef IPSEC 555 if (af == PF_KEY || af == AF_UNSPEC) 556 for (tp = pfkeyprotox; tp->pr_name; tp++) 557 printproto(tp, tp->pr_name); 558 #endif /*IPSEC*/ 559 if (af == AF_IPX || af == AF_UNSPEC) { 560 kread(0, 0, 0); 561 for (tp = ipxprotox; tp->pr_name; tp++) 562 printproto(tp, tp->pr_name); 563 } 564 if (af == AF_APPLETALK || af == AF_UNSPEC) 565 for (tp = atalkprotox; tp->pr_name; tp++) 566 printproto(tp, tp->pr_name); 567 if (af == AF_NETGRAPH || af == AF_UNSPEC) 568 for (tp = netgraphprotox; tp->pr_name; tp++) 569 printproto(tp, tp->pr_name); 570 #ifdef ISO 571 if (af == AF_ISO || af == AF_UNSPEC) 572 for (tp = isoprotox; tp->pr_name; tp++) 573 printproto(tp, tp->pr_name); 574 #endif 575 if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag) 576 unixpr(); 577 exit(0); 578 } 579 580 /* 581 * Print out protocol statistics or control blocks (per sflag). 582 * If the interface was not specifically requested, and the symbol 583 * is not in the namelist, ignore this one. 584 */ 585 static void 586 printproto(struct protox *tp, const char *name) 587 { 588 void (*pr)(u_long, const char *, int); 589 u_long off; 590 591 if (sflag) { 592 if (iflag) { 593 if (tp->pr_istats) 594 intpr(interval, nl[N_IFNET].n_value, 595 tp->pr_istats); 596 else if (pflag) 597 printf("%s: no per-interface stats routine\n", 598 tp->pr_name); 599 return; 600 } 601 else { 602 pr = tp->pr_stats; 603 if (!pr) { 604 if (pflag) 605 printf("%s: no stats routine\n", 606 tp->pr_name); 607 return; 608 } 609 off = tp->pr_usesysctl ? tp->pr_usesysctl 610 : nl[tp->pr_sindex].n_value; 611 } 612 } else { 613 pr = tp->pr_cblocks; 614 if (!pr) { 615 if (pflag) 616 printf("%s: no PCB routine\n", tp->pr_name); 617 return; 618 } 619 off = tp->pr_usesysctl ? tp->pr_usesysctl 620 : nl[tp->pr_index].n_value; 621 } 622 if (pr != NULL && (off || af != AF_UNSPEC)) 623 (*pr)(off, name, af); 624 } 625 626 /* 627 * Read kernel memory, return 0 on success. 628 */ 629 int 630 kread(u_long addr, char *buf, int size) 631 { 632 if (kvmd == 0) { 633 /* 634 * XXX. 635 */ 636 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf); 637 if (kvmd != NULL) { 638 if (kvm_nlist(kvmd, nl) < 0) { 639 if(nlistf) 640 errx(1, "%s: kvm_nlist: %s", nlistf, 641 kvm_geterr(kvmd)); 642 else 643 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd)); 644 } 645 646 if (nl[0].n_type == 0) { 647 if(nlistf) 648 errx(1, "%s: no namelist", nlistf); 649 else 650 errx(1, "no namelist"); 651 } 652 } else { 653 warnx("kvm not available"); 654 return(-1); 655 } 656 } 657 if (!buf) 658 return (0); 659 if (kvm_read(kvmd, addr, buf, size) != size) { 660 warnx("%s", kvm_geterr(kvmd)); 661 return (-1); 662 } 663 return (0); 664 } 665 666 const char * 667 plural(int n) 668 { 669 return (n != 1 ? "s" : ""); 670 } 671 672 const char * 673 plurales(int n) 674 { 675 return (n != 1 ? "es" : ""); 676 } 677 678 /* 679 * Find the protox for the given "well-known" name. 680 */ 681 static struct protox * 682 knownname(char *name) 683 { 684 struct protox **tpp, *tp; 685 686 for (tpp = protoprotox; *tpp; tpp++) 687 for (tp = *tpp; tp->pr_name; tp++) 688 if (strcmp(tp->pr_name, name) == 0) 689 return (tp); 690 return (NULL); 691 } 692 693 /* 694 * Find the protox corresponding to name. 695 */ 696 static struct protox * 697 name2protox(char *name) 698 { 699 struct protox *tp; 700 char **alias; /* alias from p->aliases */ 701 struct protoent *p; 702 703 /* 704 * Try to find the name in the list of "well-known" names. If that 705 * fails, check if name is an alias for an Internet protocol. 706 */ 707 if ((tp = knownname(name)) != NULL) 708 return (tp); 709 710 setprotoent(1); /* make protocol lookup cheaper */ 711 while ((p = getprotoent()) != NULL) { 712 /* assert: name not same as p->name */ 713 for (alias = p->p_aliases; *alias; alias++) 714 if (strcmp(name, *alias) == 0) { 715 endprotoent(); 716 return (knownname(p->p_name)); 717 } 718 } 719 endprotoent(); 720 return (NULL); 721 } 722 723 static void 724 usage(void) 725 { 726 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", 727 "usage: netstat [-AaLnPSW] [-c cpu] [-f protocol_family | -p protocol]\n" 728 " [-M core] [-N system]", 729 " netstat -i | -I interface [-aBbdnt] [-f address_family]\n" 730 " [-M core] [-N system]", 731 " netstat -w wait [-I interface] [-d] [-M core] [-N system]", 732 " netstat -s [-s] [-z] [-f protocol_family | -p protocol] [-M core]", 733 " netstat -i | -I interface -s [-f protocol_family | -p protocol]\n" 734 " [-M core] [-N system]", 735 " netstat -m [-M core] [-N system]", 736 " netstat -r [-AanW] [-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