main.c revision 175061
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 35char 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#if 0 41#ifndef lint 42static char sccsid[] = "@(#)main.c 8.4 (Berkeley) 3/1/94"; 43#endif /* not lint */ 44#endif 45 46#include <sys/cdefs.h> 47__FBSDID("$FreeBSD: head/usr.bin/netstat/main.c 175061 2008-01-02 23:26:11Z obrien $"); 48 49#include <sys/param.h> 50#include <sys/file.h> 51#include <sys/protosw.h> 52#include <sys/socket.h> 53#include <sys/socketvar.h> 54 55#include <netinet/in.h> 56 57#include <netgraph/ng_socket.h> 58 59#include <ctype.h> 60#include <err.h> 61#include <errno.h> 62#include <kvm.h> 63#include <limits.h> 64#include <netdb.h> 65#include <nlist.h> 66#include <paths.h> 67#include <stdint.h> 68#include <stdio.h> 69#include <stdlib.h> 70#include <string.h> 71#include <unistd.h> 72#include "netstat.h" 73 74static struct nlist nl[] = { 75#define N_IFNET 0 76 { .n_name = "_ifnet" }, 77#define N_RTSTAT 1 78 { .n_name = "_rtstat" }, 79#define N_RTREE 2 80 { .n_name = "_rt_tables"}, 81#define N_MRTSTAT 3 82 { .n_name = "_mrtstat" }, 83#define N_MFCTABLE 4 84 { .n_name = "_mfctable" }, 85#define N_VIFTABLE 5 86 { .n_name = "_viftable" }, 87#define N_IPX 6 88 { .n_name = "_ipxpcb_list"}, 89#define N_IPXSTAT 7 90 { .n_name = "_ipxstat"}, 91#define N_SPXSTAT 8 92 { .n_name = "_spx_istat"}, 93#define N_DDPSTAT 9 94 { .n_name = "_ddpstat"}, 95#define N_DDPCB 10 96 { .n_name = "_ddpcb"}, 97#define N_NGSOCKS 11 98 { .n_name = "_ngsocklist"}, 99#define N_IP6STAT 12 100 { .n_name = "_ip6stat" }, 101#define N_ICMP6STAT 13 102 { .n_name = "_icmp6stat" }, 103#define N_IPSECSTAT 14 104 { .n_name = "_ipsec4stat" }, 105#define N_IPSEC6STAT 15 106 { .n_name = "_ipsec6stat" }, 107#define N_PIM6STAT 16 108 { .n_name = "_pim6stat" }, 109#define N_MRT6STAT 17 110 { .n_name = "_mrt6stat" }, 111#define N_MF6CTABLE 18 112 { .n_name = "_mf6ctable" }, 113#define N_MIF6TABLE 19 114 { .n_name = "_mif6table" }, 115#define N_PFKEYSTAT 20 116 { .n_name = "_pfkeystat" }, 117#define N_MBSTAT 21 118 { .n_name = "_mbstat" }, 119#define N_MBTYPES 22 120 { .n_name = "_mbtypes" }, 121#define N_NMBCLUSTERS 23 122 { .n_name = "_nmbclusters" }, 123#define N_NMBUFS 24 124 { .n_name = "_nmbufs" }, 125#define N_MBHI 25 126 { .n_name = "_mbuf_hiwm" }, 127#define N_CLHI 26 128 { .n_name = "_clust_hiwm" }, 129#define N_NCPUS 27 130 { .n_name = "_smp_cpus" }, 131#define N_PAGESZ 28 132 { .n_name = "_pagesize" }, 133#define N_MBPSTAT 29 134 { .n_name = "_mb_statpcpu" }, 135#define N_RTTRASH 30 136 { .n_name = "_rttrash" }, 137#define N_MBLO 31 138 { .n_name = "_mbuf_lowm" }, 139#define N_CLLO 32 140 { .n_name = "_clust_lowm" }, 141#define N_CARPSTAT 33 142 { .n_name = "_carpstats" }, 143#define N_PFSYNCSTAT 34 144 { .n_name = "_pfsyncstats" }, 145#define N_AHSTAT 35 146 { .n_name = "_ahstat" }, 147#define N_ESPSTAT 36 148 { .n_name = "_espstat" }, 149#define N_IPCOMPSTAT 37 150 { .n_name = "_ipcompstat" }, 151#define N_TCPSTAT 38 152 { .n_name = "_tcpstat" }, 153#define N_UDPSTAT 39 154 { .n_name = "_udpstat" }, 155#define N_IPSTAT 40 156 { .n_name = "_ipstat" }, 157#define N_ICMPSTAT 41 158 { .n_name = "_icmpstat" }, 159#define N_IGMPSTAT 42 160 { .n_name = "_igmpstat" }, 161#define N_PIMSTAT 43 162 { .n_name = "_pimstat" }, 163#define N_TCBINFO 44 164 { .n_name = "_tcbinfo" }, 165#define N_UDBINFO 45 166 { .n_name = "_udbinfo" }, 167#define N_DIVCBINFO 46 168 { .n_name = "_divcbinfo" }, 169#define N_RIPCBINFO 47 170 { .n_name = "_ripcbinfo" }, 171#define N_UNP_COUNT 48 172 { .n_name = "_unp_count" }, 173#define N_UNP_GENCNT 49 174 { .n_name = "_unp_gencnt" }, 175#define N_UNP_DHEAD 50 176 { .n_name = "_unp_dhead" }, 177#define N_UNP_SHEAD 51 178 { .n_name = "_unp_shead" }, 179#define N_RIP6STAT 52 180 { .n_name = "_rip6stat" }, 181#define N_SCTPSTAT 53 182 { .n_name = "_sctpstat" }, 183 { .n_name = NULL }, 184}; 185 186struct protox { 187 int pr_index; /* index into nlist of cb head */ 188 int pr_sindex; /* index into nlist of stat block */ 189 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 190 void (*pr_cblocks)(u_long, const char *, int, int); 191 /* control blocks printing routine */ 192 void (*pr_stats)(u_long, const char *, int, int); 193 /* statistics printing routine */ 194 void (*pr_istats)(char *); /* per/if statistics printing routine */ 195 const char *pr_name; /* well-known name */ 196 int pr_usesysctl; /* non-zero if we use sysctl, not kvm */ 197 int pr_protocol; 198} protox[] = { 199 { N_TCBINFO, N_TCPSTAT, 1, protopr, 200 tcp_stats, NULL, "tcp", 1, IPPROTO_TCP }, 201 { N_UDBINFO, N_UDPSTAT, 1, protopr, 202 udp_stats, NULL, "udp", 1, IPPROTO_UDP }, 203#ifdef SCTP 204 { -1, N_SCTPSTAT, 1, sctp_protopr, 205 sctp_stats, NULL, "sctp", 1, IPPROTO_SCTP }, 206#endif 207 { N_DIVCBINFO, -1, 1, protopr, 208 NULL, NULL, "divert", 1, IPPROTO_DIVERT }, 209 { N_RIPCBINFO, N_IPSTAT, 1, protopr, 210 ip_stats, NULL, "ip", 1, IPPROTO_RAW }, 211 { N_RIPCBINFO, N_ICMPSTAT, 1, protopr, 212 icmp_stats, NULL, "icmp", 1, IPPROTO_ICMP }, 213 { N_RIPCBINFO, N_IGMPSTAT, 1, protopr, 214 igmp_stats, NULL, "igmp", 1, IPPROTO_IGMP }, 215#ifdef IPSEC 216 { -1, N_IPSECSTAT, 1, NULL, /* keep as compat */ 217 ipsec_stats, NULL, "ipsec", 0, 0}, 218 { -1, N_AHSTAT, 1, NULL, 219 ah_stats, NULL, "ah", 0, 0}, 220 { -1, N_ESPSTAT, 1, NULL, 221 esp_stats, NULL, "esp", 0, 0}, 222 { -1, N_IPCOMPSTAT, 1, NULL, 223 ipcomp_stats, NULL, "ipcomp", 0, 0}, 224#endif 225 { N_RIPCBINFO, N_PIMSTAT, 1, protopr, 226 pim_stats, NULL, "pim", 1, IPPROTO_PIM }, 227 { -1, N_CARPSTAT, 1, NULL, 228 carp_stats, NULL, "carp", 1, 0 }, 229 { -1, N_PFSYNCSTAT, 1, NULL, 230 pfsync_stats, NULL, "pfsync", 1, 0 }, 231 { -1, -1, 0, NULL, 232 NULL, NULL, NULL, 0, 0 } 233}; 234 235#ifdef INET6 236struct protox ip6protox[] = { 237 { N_TCBINFO, N_TCPSTAT, 1, protopr, 238 tcp_stats, NULL, "tcp", 1, IPPROTO_TCP }, 239 { N_UDBINFO, N_UDPSTAT, 1, protopr, 240 udp_stats, NULL, "udp", 1, IPPROTO_UDP }, 241 { N_RIPCBINFO, N_IP6STAT, 1, protopr, 242 ip6_stats, ip6_ifstats, "ip6", 1, IPPROTO_RAW }, 243 { N_RIPCBINFO, N_ICMP6STAT, 1, protopr, 244 icmp6_stats, icmp6_ifstats, "icmp6", 1, IPPROTO_ICMPV6 }, 245#ifdef IPSEC 246 { -1, N_IPSEC6STAT, 1, NULL, 247 ipsec_stats, NULL, "ipsec6", 0, 0 }, 248#endif 249#ifdef notyet 250 { -1, N_PIM6STAT, 1, NULL, 251 pim6_stats, NULL, "pim6", 1, 0 }, 252#endif 253 { -1, N_RIP6STAT, 1, NULL, 254 rip6_stats, NULL, "rip6", 1, 0 }, 255 { -1, -1, 0, NULL, 256 NULL, NULL, NULL, 0, 0 } 257}; 258#endif /*INET6*/ 259 260#ifdef IPSEC 261struct protox pfkeyprotox[] = { 262 { -1, N_PFKEYSTAT, 1, NULL, 263 pfkey_stats, NULL, "pfkey", 0, 0 }, 264 { -1, -1, 0, NULL, 265 NULL, NULL, NULL, 0, 0 } 266}; 267#endif 268 269struct protox atalkprotox[] = { 270 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, 271 ddp_stats, NULL, "ddp", 0, 0 }, 272 { -1, -1, 0, NULL, 273 NULL, NULL, NULL, 0, 0 } 274}; 275 276struct protox netgraphprotox[] = { 277 { N_NGSOCKS, -1, 1, netgraphprotopr, 278 NULL, NULL, "ctrl", 0, 0 }, 279 { N_NGSOCKS, -1, 1, netgraphprotopr, 280 NULL, NULL, "data", 0, 0 }, 281 { -1, -1, 0, NULL, 282 NULL, NULL, NULL, 0, 0 } 283}; 284 285#ifdef IPX 286struct protox ipxprotox[] = { 287 { N_IPX, N_IPXSTAT, 1, ipxprotopr, 288 ipx_stats, NULL, "ipx", 0, 0 }, 289 { N_IPX, N_SPXSTAT, 1, ipxprotopr, 290 spx_stats, NULL, "spx", 0, 0 }, 291 { -1, -1, 0, NULL, 292 NULL, NULL, 0, 0, 0 } 293}; 294#endif 295 296struct protox *protoprotox[] = { 297 protox, 298#ifdef INET6 299 ip6protox, 300#endif 301#ifdef IPSEC 302 pfkeyprotox, 303#endif 304#ifdef IPX 305 ipxprotox, 306#endif 307 atalkprotox, NULL }; 308 309static void printproto(struct protox *, const char *); 310static void usage(void); 311static struct protox *name2protox(const char *); 312static struct protox *knownname(const char *); 313 314static kvm_t *kvmd; 315static char *nlistf = NULL, *memf = NULL; 316 317int Aflag; /* show addresses of protocol control block */ 318int aflag; /* show all sockets (including servers) */ 319int Bflag; /* show information about bpf consumers */ 320int bflag; /* show i/f total bytes in/out */ 321int dflag; /* show i/f dropped packets */ 322int gflag; /* show group (multicast) routing or stats */ 323int hflag; /* show counters in human readable format */ 324int iflag; /* show interfaces */ 325int Lflag; /* show size of listen queues */ 326int mflag; /* show memory stats */ 327int numeric_addr; /* show addresses numerically */ 328int numeric_port; /* show ports numerically */ 329static int pflag; /* show given protocol */ 330int rflag; /* show routing tables (or routing stats) */ 331int sflag; /* show protocol statistics */ 332int tflag; /* show i/f watchdog timers */ 333int Wflag; /* wide display */ 334int zflag; /* zero stats */ 335 336int interval; /* repeat interval for i/f stats */ 337 338char *interface; /* desired i/f for stats, or NULL for all i/fs */ 339int unit; /* unit number for above */ 340 341int af; /* address family */ 342int live; /* true if we are examining a live system */ 343 344int 345main(int argc, char *argv[]) 346{ 347 struct protox *tp = NULL; /* for printing cblocks & stats */ 348 int ch; 349 350 af = AF_UNSPEC; 351 352 while ((ch = getopt(argc, argv, "AaBbdf:ghI:iLlM:mN:np:rSstuWw:z")) != -1) 353 switch(ch) { 354 case 'A': 355 Aflag = 1; 356 break; 357 case 'a': 358 aflag = 1; 359 break; 360 case 'B': 361 Bflag = 1; 362 break; 363 case 'b': 364 bflag = 1; 365 break; 366 case 'd': 367 dflag = 1; 368 break; 369 case 'f': 370 if (strcmp(optarg, "ipx") == 0) 371 af = AF_IPX; 372 else if (strcmp(optarg, "inet") == 0) 373 af = AF_INET; 374#ifdef INET6 375 else if (strcmp(optarg, "inet6") == 0) 376 af = AF_INET6; 377#endif 378#ifdef IPSEC 379 else if (strcmp(optarg, "pfkey") == 0) 380 af = PF_KEY; 381#endif 382 else if (strcmp(optarg, "unix") == 0) 383 af = AF_UNIX; 384 else if (strcmp(optarg, "atalk") == 0) 385 af = AF_APPLETALK; 386 else if (strcmp(optarg, "ng") == 0 387 || strcmp(optarg, "netgraph") == 0) 388 af = AF_NETGRAPH; 389 else if (strcmp(optarg, "link") == 0) 390 af = AF_LINK; 391 else { 392 errx(1, "%s: unknown address family", optarg); 393 } 394 break; 395 case 'g': 396 gflag = 1; 397 break; 398 case 'h': 399 hflag = 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 if ((tp = name2protox(optarg)) == NULL) { 430 errx(1, 431 "%s: unknown or uninstrumented protocol", 432 optarg); 433 } 434 pflag = 1; 435 break; 436 case 'r': 437 rflag = 1; 438 break; 439 case 's': 440 ++sflag; 441 break; 442 case 'S': 443 numeric_addr = 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 live = (nlistf == NULL && memf == NULL); 492 if (!live) 493 setgid(getgid()); 494 495 if (Bflag) { 496 if (!live) 497 usage(); 498 bpf_stats(interface); 499 exit(0); 500 } 501 if (mflag) { 502 if (memf != NULL) { 503 if (kread(0, NULL, 0) == 0) 504 mbpr(kvmd, nl[N_MBSTAT].n_value); 505 } else 506 mbpr(NULL, 0); 507 exit(0); 508 } 509#if 0 510 /* 511 * Keep file descriptors open to avoid overhead 512 * of open/close on each call to get* routines. 513 */ 514 sethostent(1); 515 setnetent(1); 516#else 517 /* 518 * This does not make sense any more with DNS being default over 519 * the files. Doing a setXXXXent(1) causes a tcp connection to be 520 * used for the queries, which is slower. 521 */ 522#endif 523 kread(0, NULL, 0); 524 if (iflag && !sflag) { 525 intpr(interval, nl[N_IFNET].n_value, NULL); 526 exit(0); 527 } 528 if (rflag) { 529 if (sflag) 530 rt_stats(nl[N_RTSTAT].n_value, nl[N_RTTRASH].n_value); 531 else 532 routepr(nl[N_RTREE].n_value); 533 exit(0); 534 } 535 if (gflag) { 536 if (sflag) { 537 if (af == AF_INET || af == AF_UNSPEC) 538 mrt_stats(nl[N_MRTSTAT].n_value); 539#ifdef INET6 540 if (af == AF_INET6 || af == AF_UNSPEC) 541 mrt6_stats(nl[N_MRT6STAT].n_value); 542#endif 543 } else { 544 if (af == AF_INET || af == AF_UNSPEC) 545 mroutepr(nl[N_MFCTABLE].n_value, 546 nl[N_VIFTABLE].n_value); 547#ifdef INET6 548 if (af == AF_INET6 || af == AF_UNSPEC) 549 mroute6pr(nl[N_MF6CTABLE].n_value, 550 nl[N_MIF6TABLE].n_value); 551#endif 552 } 553 ifmalist_dump(); 554 exit(0); 555 } 556 557 if (tp) { 558 printproto(tp, tp->pr_name); 559 exit(0); 560 } 561 if (af == AF_INET || af == AF_UNSPEC) 562 for (tp = protox; tp->pr_name; tp++) 563 printproto(tp, tp->pr_name); 564#ifdef INET6 565 if (af == AF_INET6 || af == AF_UNSPEC) 566 for (tp = ip6protox; tp->pr_name; tp++) 567 printproto(tp, tp->pr_name); 568#endif /*INET6*/ 569#ifdef IPSEC 570 if (af == PF_KEY || af == AF_UNSPEC) 571 for (tp = pfkeyprotox; tp->pr_name; tp++) 572 printproto(tp, tp->pr_name); 573#endif /*IPSEC*/ 574#ifdef IPX 575 if (af == AF_IPX || af == AF_UNSPEC) { 576 for (tp = ipxprotox; tp->pr_name; tp++) 577 printproto(tp, tp->pr_name); 578 } 579#endif /* IPX */ 580 if (af == AF_APPLETALK || af == AF_UNSPEC) 581 for (tp = atalkprotox; tp->pr_name; tp++) 582 printproto(tp, tp->pr_name); 583 if (af == AF_NETGRAPH || af == AF_UNSPEC) 584 for (tp = netgraphprotox; tp->pr_name; tp++) 585 printproto(tp, tp->pr_name); 586 if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag) 587 unixpr(nl[N_UNP_COUNT].n_value, nl[N_UNP_GENCNT].n_value, 588 nl[N_UNP_DHEAD].n_value, nl[N_UNP_SHEAD].n_value); 589 exit(0); 590} 591 592/* 593 * Print out protocol statistics or control blocks (per sflag). 594 * If the interface was not specifically requested, and the symbol 595 * is not in the namelist, ignore this one. 596 */ 597static void 598printproto(tp, name) 599 struct protox *tp; 600 const char *name; 601{ 602 void (*pr)(u_long, const char *, int, int); 603 u_long off; 604 605 if (sflag) { 606 if (iflag) { 607 if (tp->pr_istats) 608 intpr(interval, nl[N_IFNET].n_value, 609 tp->pr_istats); 610 else if (pflag) 611 printf("%s: no per-interface stats routine\n", 612 tp->pr_name); 613 return; 614 } else { 615 pr = tp->pr_stats; 616 if (!pr) { 617 if (pflag) 618 printf("%s: no stats routine\n", 619 tp->pr_name); 620 return; 621 } 622 if (tp->pr_usesysctl && live) 623 off = 0; 624 else if (tp->pr_sindex < 0) { 625 if (pflag) 626 printf( 627 "%s: stats routine doesn't work on cores\n", 628 tp->pr_name); 629 return; 630 } else 631 off = nl[tp->pr_sindex].n_value; 632 } 633 } else { 634 pr = tp->pr_cblocks; 635 if (!pr) { 636 if (pflag) 637 printf("%s: no PCB routine\n", tp->pr_name); 638 return; 639 } 640 if (tp->pr_usesysctl && live) 641 off = 0; 642 else if (tp->pr_index < 0) { 643 if (pflag) 644 printf( 645 "%s: PCB routine doesn't work on cores\n", 646 tp->pr_name); 647 return; 648 } else 649 off = nl[tp->pr_index].n_value; 650 } 651 if (pr != NULL && (off || (live && tp->pr_usesysctl) || 652 af != AF_UNSPEC)) 653 (*pr)(off, name, af, tp->pr_protocol); 654} 655 656/* 657 * Read kernel memory, return 0 on success. 658 */ 659int 660kread(u_long addr, void *buf, size_t size) 661{ 662 char errbuf[_POSIX2_LINE_MAX]; 663 664 if (kvmd == NULL) { 665 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 666 setgid(getgid()); 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: %s", errbuf); 684 return(-1); 685 } 686 } 687 if (!buf) 688 return (0); 689 if (kvm_read(kvmd, addr, buf, size) != (ssize_t)size) { 690 warnx("%s", kvm_geterr(kvmd)); 691 return (-1); 692 } 693 return (0); 694} 695 696const char * 697plural(uintmax_t n) 698{ 699 return (n != 1 ? "s" : ""); 700} 701 702const char * 703plurales(uintmax_t n) 704{ 705 return (n != 1 ? "es" : ""); 706} 707 708const char * 709pluralies(uintmax_t n) 710{ 711 return (n != 1 ? "ies" : "y"); 712} 713 714/* 715 * Find the protox for the given "well-known" name. 716 */ 717static struct protox * 718knownname(const char *name) 719{ 720 struct protox **tpp, *tp; 721 722 for (tpp = protoprotox; *tpp; tpp++) 723 for (tp = *tpp; tp->pr_name; tp++) 724 if (strcmp(tp->pr_name, name) == 0) 725 return (tp); 726 return (NULL); 727} 728 729/* 730 * Find the protox corresponding to name. 731 */ 732static struct protox * 733name2protox(const char *name) 734{ 735 struct protox *tp; 736 char **alias; /* alias from p->aliases */ 737 struct protoent *p; 738 739 /* 740 * Try to find the name in the list of "well-known" names. If that 741 * fails, check if name is an alias for an Internet protocol. 742 */ 743 if ((tp = knownname(name)) != NULL) 744 return (tp); 745 746 setprotoent(1); /* make protocol lookup cheaper */ 747 while ((p = getprotoent()) != NULL) { 748 /* assert: name not same as p->name */ 749 for (alias = p->p_aliases; *alias; alias++) 750 if (strcmp(name, *alias) == 0) { 751 endprotoent(); 752 return (knownname(p->p_name)); 753 } 754 } 755 endprotoent(); 756 return (NULL); 757} 758 759static void 760usage(void) 761{ 762 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", 763"usage: netstat [-AaLnSW] [-f protocol_family | -p protocol]\n" 764" [-M core] [-N system]", 765" netstat -i | -I interface [-abdhnt] [-f address_family]\n" 766" [-M core] [-N system]", 767" netstat -w wait [-I interface] [-d] [-M core] [-N system]", 768" netstat -s [-s] [-z] [-f protocol_family | -p protocol] [-M core]", 769" netstat -i | -I interface -s [-f protocol_family | -p protocol]\n" 770" [-M core] [-N system]", 771" netstat -m [-M core] [-N system]", 772" netstat -B [ -I interface]", 773" netstat -r [-AenW] [-f address_family] [-M core] [-N system]", 774" netstat -rs [-s] [-M core] [-N system]", 775" netstat -g [-W] [-f address_family] [-M core] [-N system]", 776" netstat -gs [-s] [-f address_family] [-M core] [-N system]"); 777 exit(1); 778} 779