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 NS 252 struct protox nsprotox[] = { 253 { N_IDP, N_IDPSTAT, 1, nsprotopr, 254 idp_stats, NULL, "idp" }, 255 { N_IDP, N_SPPSTAT, 1, nsprotopr, 256 spp_stats, NULL, "spp" }, 257 { -1, N_NSERR, 1, 0, 258 nserr_stats, NULL, "ns_err" }, 259 { -1, -1, 0, 0, 260 0, NULL, 0 } 261 }; 262 #endif 263 264 #ifdef ISO 265 struct protox isoprotox[] = { 266 { ISO_TP, N_TPSTAT, 1, iso_protopr, 267 tp_stats, NULL, "tp" }, 268 { N_CLTP, N_CLTPSTAT, 1, iso_protopr, 269 cltp_stats, NULL, "cltp" }, 270 { -1, N_CLNPSTAT, 1, 0, 271 clnp_stats, NULL, "clnp"}, 272 { -1, N_ESISSTAT, 1, 0, 273 esis_stats, NULL, "esis"}, 274 { -1, -1, 0, 0, 275 0, NULL, 0 } 276 }; 277 #endif 278 279 struct protox *protoprotox[] = { 280 protox, 281 #ifdef INET6 282 ip6protox, 283 #endif 284 #ifdef IPSEC 285 pfkeyprotox, 286 #endif 287 ipxprotox, atalkprotox, 288 #ifdef NS 289 nsprotox, 290 #endif 291 #ifdef ISO 292 isoprotox, 293 #endif 294 NULL }; 295 296 static void printproto (struct protox *, const char *); 297 static void usage (void); 298 static struct protox *name2protox (char *); 299 static struct protox *knownname (char *); 300 301 static kvm_t *kvmd; 302 static char *nlistf = NULL, *memf = NULL; 303 304 int Aflag; /* show addresses of protocol control block */ 305 int aflag; /* show all sockets (including servers) */ 306 int bflag; /* show i/f total bytes in/out */ 307 int cpuflag = -1; /* dump route table from specific cpu */ 308 int dflag; /* show i/f dropped packets */ 309 int gflag; /* show group (multicast) routing or stats */ 310 int iflag; /* show interfaces */ 311 int Lflag; /* show size of listen queues */ 312 int mflag; /* show memory stats */ 313 int Pflag; /* show more protocol info (go past 80 columns) */ 314 int numeric_addr; /* show addresses numerically */ 315 int numeric_port; /* show ports numerically */ 316 static int pflag; /* show given protocol */ 317 int rflag; /* show routing tables (or routing stats) */ 318 int sflag; /* show protocol statistics */ 319 int tflag; /* show i/f watchdog timers */ 320 int Bflag; /* show buffer limit instead of buffer use */ 321 int Wflag; /* wide display */ 322 int zflag; /* zero stats */ 323 324 int interval; /* repeat interval for i/f stats */ 325 326 char *interface; /* desired i/f for stats, or NULL for all i/fs */ 327 int unit; /* unit number for above */ 328 329 int af; /* address family */ 330 331 int 332 main(int argc, char **argv) 333 { 334 struct protox *tp = NULL; /* for printing cblocks & stats */ 335 int ch; 336 int n; 337 338 af = AF_UNSPEC; 339 340 while ((ch = getopt(argc, argv, "Aabc:df:gI:iLlM:mN:nPp:rSsBtuWw:z")) != -1) 341 switch(ch) { 342 case 'A': 343 Aflag = 1; 344 break; 345 case 'a': 346 aflag = 1; 347 break; 348 case 'b': 349 bflag = 1; 350 break; 351 case 'c': 352 kread(0, 0, 0); 353 kread(nl[N_NCPUS].n_value, (char *)&n, sizeof(n)); 354 cpuflag = strtol(optarg, NULL, 0); 355 if (cpuflag < 0 || cpuflag >= n) 356 errx(1, "cpu %d does not exist", cpuflag); 357 break; 358 case 'd': 359 dflag = 1; 360 break; 361 case 'f': 362 #ifdef NS 363 if (strcmp(optarg, "ns") == 0) 364 af = AF_NS; 365 else 366 #endif 367 if (strcmp(optarg, "ipx") == 0) 368 af = AF_IPX; 369 else if (strcmp(optarg, "inet") == 0) 370 af = AF_INET; 371 #ifdef INET6 372 else if (strcmp(optarg, "inet6") == 0) 373 af = AF_INET6; 374 #endif /*INET6*/ 375 #ifdef INET6 376 else if (strcmp(optarg, "pfkey") == 0) 377 af = PF_KEY; 378 #endif /*INET6*/ 379 else if (strcmp(optarg, "unix") == 0) 380 af = AF_UNIX; 381 else if (strcmp(optarg, "atalk") == 0) 382 af = AF_APPLETALK; 383 else if (strcmp(optarg, "ng") == 0 384 || strcmp(optarg, "netgraph") == 0) 385 af = AF_NETGRAPH; 386 #ifdef ISO 387 else if (strcmp(optarg, "iso") == 0) 388 af = AF_ISO; 389 #endif 390 else if (strcmp(optarg, "link") == 0) 391 af = AF_LINK; 392 else if (strcmp(optarg, "mpls") == 0) 393 af = AF_MPLS; 394 else { 395 errx(1, "%s: unknown address family", optarg); 396 } 397 break; 398 case 'g': 399 gflag = 1; 400 break; 401 case 'I': { 402 char *cp; 403 404 iflag = 1; 405 for (cp = interface = optarg; isalpha(*cp); cp++) 406 continue; 407 unit = atoi(cp); 408 break; 409 } 410 case 'i': 411 iflag = 1; 412 break; 413 case 'L': 414 Lflag = 1; 415 break; 416 case 'M': 417 memf = optarg; 418 break; 419 case 'm': 420 mflag = 1; 421 break; 422 case 'N': 423 nlistf = optarg; 424 break; 425 case 'n': 426 numeric_addr = numeric_port = 1; 427 break; 428 case 'P': 429 Pflag = 1; 430 break; 431 case 'p': 432 if ((tp = name2protox(optarg)) == NULL) { 433 errx(1, 434 "%s: unknown or uninstrumented protocol", 435 optarg); 436 } 437 pflag = 1; 438 break; 439 case 'r': 440 rflag = 1; 441 break; 442 case 's': 443 ++sflag; 444 break; 445 case 'S': 446 numeric_addr = 1; 447 break; 448 case 'B': 449 Bflag = 1; 450 break; 451 case 't': 452 tflag = 1; 453 break; 454 case 'u': 455 af = AF_UNIX; 456 break; 457 case 'W': 458 case 'l': 459 Wflag = 1; 460 break; 461 case 'w': 462 interval = atoi(optarg); 463 iflag = 1; 464 break; 465 case 'z': 466 zflag = 1; 467 break; 468 case '?': 469 default: 470 usage(); 471 } 472 argv += optind; 473 argc -= optind; 474 475 #define BACKWARD_COMPATIBILITY 476 #ifdef BACKWARD_COMPATIBILITY 477 if (*argv) { 478 if (isdigit(**argv)) { 479 interval = atoi(*argv); 480 if (interval <= 0) 481 usage(); 482 ++argv; 483 iflag = 1; 484 } 485 if (*argv) { 486 nlistf = *argv; 487 if (*++argv) 488 memf = *argv; 489 } 490 } 491 #endif 492 493 /* 494 * Discard setgid privileges if not the running kernel so that bad 495 * guys can't print interesting stuff from kernel memory. 496 */ 497 if (nlistf != NULL || memf != NULL) 498 setgid(getgid()); 499 500 if (mflag) { 501 if (memf != NULL) { 502 if (kread(0, 0, 0) == 0) 503 mbpr(nl[N_MBSTAT].n_value, 504 nl[N_MBTYPES].n_value, 505 nl[N_NMBCLUSTERS].n_value, 506 nl[N_NMBUFS].n_value, 507 nl[N_NCPUS].n_value); 508 } else { 509 mbpr(0, 0, 0, 0, 0); 510 } 511 exit(0); 512 } 513 #if 0 514 /* 515 * Keep file descriptors open to avoid overhead 516 * of open/close on each call to get* routines. 517 */ 518 sethostent(1); 519 setnetent(1); 520 #else 521 /* 522 * This does not make sense any more with DNS being default over 523 * the files. Doing a setXXXXent(1) causes a tcp connection to be 524 * used for the queries, which is slower. 525 */ 526 #endif 527 if (iflag && !sflag) { 528 kread(0, 0, 0); 529 intpr(interval, nl[N_IFNET].n_value, NULL); 530 exit(0); 531 } 532 if (rflag) { 533 kread(0, 0, 0); 534 if (sflag) 535 rt_stats(); 536 else 537 routepr(nl[N_RTREE].n_value); 538 exit(0); 539 } 540 if (gflag) { 541 kread(0, 0, 0); 542 if (sflag) { 543 if (af == AF_INET || af == AF_UNSPEC) 544 mrt_stats(nl[N_MRTSTAT].n_value); 545 #ifdef INET6 546 if (af == AF_INET6 || af == AF_UNSPEC) 547 mrt6_stats(nl[N_MRT6STAT].n_value); 548 #endif 549 } else { 550 if (af == AF_INET || af == AF_UNSPEC) 551 mroutepr(nl[N_MFCTABLE].n_value, 552 nl[N_VIFTABLE].n_value); 553 #ifdef INET6 554 if (af == AF_INET6 || af == AF_UNSPEC) 555 mroute6pr(nl[N_MF6CTABLE].n_value, 556 nl[N_MIF6TABLE].n_value); 557 #endif 558 } 559 exit(0); 560 } 561 562 kread(0, 0, 0); 563 if (tp) { 564 printproto(tp, tp->pr_name); 565 exit(0); 566 } 567 if (af == AF_INET || af == AF_UNSPEC) 568 for (tp = protox; tp->pr_name; tp++) 569 printproto(tp, tp->pr_name); 570 #ifdef INET6 571 if (af == AF_INET6 || af == AF_UNSPEC) 572 for (tp = ip6protox; tp->pr_name; tp++) 573 printproto(tp, tp->pr_name); 574 #endif /*INET6*/ 575 #ifdef IPSEC 576 if (af == PF_KEY || af == AF_UNSPEC) 577 for (tp = pfkeyprotox; tp->pr_name; tp++) 578 printproto(tp, tp->pr_name); 579 #endif /*IPSEC*/ 580 if (af == AF_IPX || af == AF_UNSPEC) { 581 kread(0, 0, 0); 582 for (tp = ipxprotox; tp->pr_name; tp++) 583 printproto(tp, tp->pr_name); 584 } 585 if (af == AF_APPLETALK || af == AF_UNSPEC) 586 for (tp = atalkprotox; tp->pr_name; tp++) 587 printproto(tp, tp->pr_name); 588 if (af == AF_NETGRAPH || af == AF_UNSPEC) 589 for (tp = netgraphprotox; tp->pr_name; tp++) 590 printproto(tp, tp->pr_name); 591 #ifdef NS 592 if (af == AF_NS || af == AF_UNSPEC) 593 for (tp = nsprotox; tp->pr_name; tp++) 594 printproto(tp, tp->pr_name); 595 #endif 596 #ifdef ISO 597 if (af == AF_ISO || af == AF_UNSPEC) 598 for (tp = isoprotox; tp->pr_name; tp++) 599 printproto(tp, tp->pr_name); 600 #endif 601 if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag) 602 unixpr(); 603 exit(0); 604 } 605 606 /* 607 * Print out protocol statistics or control blocks (per sflag). 608 * If the interface was not specifically requested, and the symbol 609 * is not in the namelist, ignore this one. 610 */ 611 static void 612 printproto(struct protox *tp, const char *name) 613 { 614 void (*pr)(u_long, const char *, int); 615 u_long off; 616 617 if (sflag) { 618 if (iflag) { 619 if (tp->pr_istats) 620 intpr(interval, nl[N_IFNET].n_value, 621 tp->pr_istats); 622 else if (pflag) 623 printf("%s: no per-interface stats routine\n", 624 tp->pr_name); 625 return; 626 } 627 else { 628 pr = tp->pr_stats; 629 if (!pr) { 630 if (pflag) 631 printf("%s: no stats routine\n", 632 tp->pr_name); 633 return; 634 } 635 off = tp->pr_usesysctl ? tp->pr_usesysctl 636 : nl[tp->pr_sindex].n_value; 637 } 638 } else { 639 pr = tp->pr_cblocks; 640 if (!pr) { 641 if (pflag) 642 printf("%s: no PCB routine\n", tp->pr_name); 643 return; 644 } 645 off = tp->pr_usesysctl ? tp->pr_usesysctl 646 : nl[tp->pr_index].n_value; 647 } 648 if (pr != NULL && (off || af != AF_UNSPEC)) 649 (*pr)(off, name, af); 650 } 651 652 /* 653 * Read kernel memory, return 0 on success. 654 */ 655 int 656 kread(u_long addr, char *buf, int size) 657 { 658 if (kvmd == 0) { 659 /* 660 * XXX. 661 */ 662 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf); 663 if (kvmd != NULL) { 664 if (kvm_nlist(kvmd, nl) < 0) { 665 if(nlistf) 666 errx(1, "%s: kvm_nlist: %s", nlistf, 667 kvm_geterr(kvmd)); 668 else 669 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd)); 670 } 671 672 if (nl[0].n_type == 0) { 673 if(nlistf) 674 errx(1, "%s: no namelist", nlistf); 675 else 676 errx(1, "no namelist"); 677 } 678 } else { 679 warnx("kvm not available"); 680 return(-1); 681 } 682 } 683 if (!buf) 684 return (0); 685 if (kvm_read(kvmd, addr, buf, size) != size) { 686 warnx("%s", kvm_geterr(kvmd)); 687 return (-1); 688 } 689 return (0); 690 } 691 692 const char * 693 plural(int n) 694 { 695 return (n != 1 ? "s" : ""); 696 } 697 698 const char * 699 plurales(int n) 700 { 701 return (n != 1 ? "es" : ""); 702 } 703 704 /* 705 * Find the protox for the given "well-known" name. 706 */ 707 static struct protox * 708 knownname(char *name) 709 { 710 struct protox **tpp, *tp; 711 712 for (tpp = protoprotox; *tpp; tpp++) 713 for (tp = *tpp; tp->pr_name; tp++) 714 if (strcmp(tp->pr_name, name) == 0) 715 return (tp); 716 return (NULL); 717 } 718 719 /* 720 * Find the protox corresponding to name. 721 */ 722 static struct protox * 723 name2protox(char *name) 724 { 725 struct protox *tp; 726 char **alias; /* alias from p->aliases */ 727 struct protoent *p; 728 729 /* 730 * Try to find the name in the list of "well-known" names. If that 731 * fails, check if name is an alias for an Internet protocol. 732 */ 733 if ((tp = knownname(name)) != NULL) 734 return (tp); 735 736 setprotoent(1); /* make protocol lookup cheaper */ 737 while ((p = getprotoent()) != NULL) { 738 /* assert: name not same as p->name */ 739 for (alias = p->p_aliases; *alias; alias++) 740 if (strcmp(name, *alias) == 0) { 741 endprotoent(); 742 return (knownname(p->p_name)); 743 } 744 } 745 endprotoent(); 746 return (NULL); 747 } 748 749 static void 750 usage(void) 751 { 752 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", 753 "usage: netstat [-AaLnPSW] [-c cpu] [-f protocol_family | -p protocol]\n" 754 " [-M core] [-N system]", 755 " netstat -i | -I interface [-aBbdnt] [-f address_family]\n" 756 " [-M core] [-N system]", 757 " netstat -w wait [-I interface] [-d] [-M core] [-N system]", 758 " netstat -s [-s] [-z] [-f protocol_family | -p protocol] [-M core]", 759 " netstat -i | -I interface -s [-f protocol_family | -p protocol]\n" 760 " [-M core] [-N system]", 761 " netstat -m [-M core] [-N system]", 762 " netstat -r [-AanW] [-f address_family] [-M core] [-N system]", 763 " netstat -rs [-s] [-M core] [-N system]", 764 " netstat -g [-W] [-f address_family] [-M core] [-N system]", 765 " netstat -gs [-s] [-f address_family] [-M core] [-N system]"); 766 exit(1); 767 } 768