main.c revision 187018
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 187018 2009-01-10 12:39:12Z ru $"); 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#ifdef NETGRAPH 58#include <netgraph/ng_socket.h> 59#endif 60 61#include <ctype.h> 62#include <err.h> 63#include <errno.h> 64#include <kvm.h> 65#include <limits.h> 66#include <netdb.h> 67#include <nlist.h> 68#include <paths.h> 69#include <stdint.h> 70#include <stdio.h> 71#include <stdlib.h> 72#include <string.h> 73#include <unistd.h> 74#include "netstat.h" 75 76static struct nlist nl[] = { 77#define N_IFNET 0 78 { .n_name = "_ifnet" }, 79#define N_RTSTAT 1 80 { .n_name = "_rtstat" }, 81#define N_RTREE 2 82 { .n_name = "_rt_tables"}, 83#define N_MRTSTAT 3 84 { .n_name = "_mrtstat" }, 85#define N_MFCTABLE 4 86 { .n_name = "_mfctable" }, 87#define N_VIFTABLE 5 88 { .n_name = "_viftable" }, 89#define N_IPX 6 90 { .n_name = "_ipxpcb_list"}, 91#define N_IPXSTAT 7 92 { .n_name = "_ipxstat"}, 93#define N_SPXSTAT 8 94 { .n_name = "_spx_istat"}, 95#define N_DDPSTAT 9 96 { .n_name = "_ddpstat"}, 97#define N_DDPCB 10 98 { .n_name = "_ddpcb"}, 99#define N_NGSOCKS 11 100 { .n_name = "_ngsocklist"}, 101#define N_IP6STAT 12 102 { .n_name = "_ip6stat" }, 103#define N_ICMP6STAT 13 104 { .n_name = "_icmp6stat" }, 105#define N_IPSECSTAT 14 106 { .n_name = "_ipsec4stat" }, 107#define N_IPSEC6STAT 15 108 { .n_name = "_ipsec6stat" }, 109#define N_PIM6STAT 16 110 { .n_name = "_pim6stat" }, 111#define N_MRT6STAT 17 112 { .n_name = "_mrt6stat" }, 113#define N_MF6CTABLE 18 114 { .n_name = "_mf6ctable" }, 115#define N_MIF6TABLE 19 116 { .n_name = "_mif6table" }, 117#define N_PFKEYSTAT 20 118 { .n_name = "_pfkeystat" }, 119#define N_MBSTAT 21 120 { .n_name = "_mbstat" }, 121#define N_MBTYPES 22 122 { .n_name = "_mbtypes" }, 123#define N_NMBCLUSTERS 23 124 { .n_name = "_nmbclusters" }, 125#define N_NMBUFS 24 126 { .n_name = "_nmbufs" }, 127#define N_MBHI 25 128 { .n_name = "_mbuf_hiwm" }, 129#define N_CLHI 26 130 { .n_name = "_clust_hiwm" }, 131#define N_NCPUS 27 132 { .n_name = "_smp_cpus" }, 133#define N_PAGESZ 28 134 { .n_name = "_pagesize" }, 135#define N_MBPSTAT 29 136 { .n_name = "_mb_statpcpu" }, 137#define N_RTTRASH 30 138 { .n_name = "_rttrash" }, 139#define N_MBLO 31 140 { .n_name = "_mbuf_lowm" }, 141#define N_CLLO 32 142 { .n_name = "_clust_lowm" }, 143#define N_CARPSTAT 33 144 { .n_name = "_carpstats" }, 145#define N_PFSYNCSTAT 34 146 { .n_name = "_pfsyncstats" }, 147#define N_AHSTAT 35 148 { .n_name = "_ahstat" }, 149#define N_ESPSTAT 36 150 { .n_name = "_espstat" }, 151#define N_IPCOMPSTAT 37 152 { .n_name = "_ipcompstat" }, 153#define N_TCPSTAT 38 154 { .n_name = "_tcpstat" }, 155#define N_UDPSTAT 39 156 { .n_name = "_udpstat" }, 157#define N_IPSTAT 40 158 { .n_name = "_ipstat" }, 159#define N_ICMPSTAT 41 160 { .n_name = "_icmpstat" }, 161#define N_IGMPSTAT 42 162 { .n_name = "_igmpstat" }, 163#define N_PIMSTAT 43 164 { .n_name = "_pimstat" }, 165#define N_TCBINFO 44 166 { .n_name = "_tcbinfo" }, 167#define N_UDBINFO 45 168 { .n_name = "_udbinfo" }, 169#define N_DIVCBINFO 46 170 { .n_name = "_divcbinfo" }, 171#define N_RIPCBINFO 47 172 { .n_name = "_ripcbinfo" }, 173#define N_UNP_COUNT 48 174 { .n_name = "_unp_count" }, 175#define N_UNP_GENCNT 49 176 { .n_name = "_unp_gencnt" }, 177#define N_UNP_DHEAD 50 178 { .n_name = "_unp_dhead" }, 179#define N_UNP_SHEAD 51 180 { .n_name = "_unp_shead" }, 181#define N_RIP6STAT 52 182 { .n_name = "_rip6stat" }, 183#define N_SCTPSTAT 53 184 { .n_name = "_sctpstat" }, 185 { .n_name = NULL }, 186}; 187 188struct protox { 189 int pr_index; /* index into nlist of cb head */ 190 int pr_sindex; /* index into nlist of stat block */ 191 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 192 void (*pr_cblocks)(u_long, const char *, int, int); 193 /* control blocks printing routine */ 194 void (*pr_stats)(u_long, const char *, int, int); 195 /* statistics printing routine */ 196 void (*pr_istats)(char *); /* per/if statistics printing routine */ 197 const char *pr_name; /* well-known name */ 198 int pr_usesysctl; /* non-zero if we use sysctl, not kvm */ 199 int pr_protocol; 200} protox[] = { 201 { N_TCBINFO, N_TCPSTAT, 1, protopr, 202 tcp_stats, NULL, "tcp", 1, IPPROTO_TCP }, 203 { N_UDBINFO, N_UDPSTAT, 1, protopr, 204 udp_stats, NULL, "udp", 1, IPPROTO_UDP }, 205#ifdef SCTP 206 { -1, N_SCTPSTAT, 1, sctp_protopr, 207 sctp_stats, NULL, "sctp", 1, IPPROTO_SCTP }, 208#endif 209 { N_DIVCBINFO, -1, 1, protopr, 210 NULL, NULL, "divert", 1, IPPROTO_DIVERT }, 211 { N_RIPCBINFO, N_IPSTAT, 1, protopr, 212 ip_stats, NULL, "ip", 1, IPPROTO_RAW }, 213 { N_RIPCBINFO, N_ICMPSTAT, 1, protopr, 214 icmp_stats, NULL, "icmp", 1, IPPROTO_ICMP }, 215 { N_RIPCBINFO, N_IGMPSTAT, 1, protopr, 216 igmp_stats, NULL, "igmp", 1, IPPROTO_IGMP }, 217#ifdef IPSEC 218 { -1, N_IPSECSTAT, 1, NULL, /* keep as compat */ 219 ipsec_stats, NULL, "ipsec", 0, 0}, 220 { -1, N_AHSTAT, 1, NULL, 221 ah_stats, NULL, "ah", 0, 0}, 222 { -1, N_ESPSTAT, 1, NULL, 223 esp_stats, NULL, "esp", 0, 0}, 224 { -1, N_IPCOMPSTAT, 1, NULL, 225 ipcomp_stats, NULL, "ipcomp", 0, 0}, 226#endif 227 { N_RIPCBINFO, N_PIMSTAT, 1, protopr, 228 pim_stats, NULL, "pim", 1, IPPROTO_PIM }, 229 { -1, N_CARPSTAT, 1, NULL, 230 carp_stats, NULL, "carp", 1, 0 }, 231 { -1, N_PFSYNCSTAT, 1, NULL, 232 pfsync_stats, NULL, "pfsync", 1, 0 }, 233 { -1, -1, 0, NULL, 234 NULL, NULL, NULL, 0, 0 } 235}; 236 237#ifdef INET6 238struct protox ip6protox[] = { 239 { N_TCBINFO, N_TCPSTAT, 1, protopr, 240 tcp_stats, NULL, "tcp", 1, IPPROTO_TCP }, 241 { N_UDBINFO, N_UDPSTAT, 1, protopr, 242 udp_stats, NULL, "udp", 1, IPPROTO_UDP }, 243 { N_RIPCBINFO, N_IP6STAT, 1, protopr, 244 ip6_stats, ip6_ifstats, "ip6", 1, IPPROTO_RAW }, 245 { N_RIPCBINFO, N_ICMP6STAT, 1, protopr, 246 icmp6_stats, icmp6_ifstats, "icmp6", 1, IPPROTO_ICMPV6 }, 247#ifdef IPSEC 248 { -1, N_IPSEC6STAT, 1, NULL, 249 ipsec_stats, NULL, "ipsec6", 0, 0 }, 250#endif 251#ifdef notyet 252 { -1, N_PIM6STAT, 1, NULL, 253 pim6_stats, NULL, "pim6", 1, 0 }, 254#endif 255 { -1, N_RIP6STAT, 1, NULL, 256 rip6_stats, NULL, "rip6", 1, 0 }, 257 { -1, -1, 0, NULL, 258 NULL, NULL, NULL, 0, 0 } 259}; 260#endif /*INET6*/ 261 262#ifdef IPSEC 263struct protox pfkeyprotox[] = { 264 { -1, N_PFKEYSTAT, 1, NULL, 265 pfkey_stats, NULL, "pfkey", 0, 0 }, 266 { -1, -1, 0, NULL, 267 NULL, NULL, NULL, 0, 0 } 268}; 269#endif 270 271struct protox atalkprotox[] = { 272 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, 273 ddp_stats, NULL, "ddp", 0, 0 }, 274 { -1, -1, 0, NULL, 275 NULL, NULL, NULL, 0, 0 } 276}; 277#ifdef NETGRAPH 278struct protox netgraphprotox[] = { 279 { N_NGSOCKS, -1, 1, netgraphprotopr, 280 NULL, NULL, "ctrl", 0, 0 }, 281 { N_NGSOCKS, -1, 1, netgraphprotopr, 282 NULL, NULL, "data", 0, 0 }, 283 { -1, -1, 0, NULL, 284 NULL, NULL, NULL, 0, 0 } 285}; 286#endif 287#ifdef IPX 288struct protox ipxprotox[] = { 289 { N_IPX, N_IPXSTAT, 1, ipxprotopr, 290 ipx_stats, NULL, "ipx", 0, 0 }, 291 { N_IPX, N_SPXSTAT, 1, ipxprotopr, 292 spx_stats, NULL, "spx", 0, 0 }, 293 { -1, -1, 0, NULL, 294 NULL, NULL, 0, 0, 0 } 295}; 296#endif 297 298struct protox *protoprotox[] = { 299 protox, 300#ifdef INET6 301 ip6protox, 302#endif 303#ifdef IPSEC 304 pfkeyprotox, 305#endif 306#ifdef IPX 307 ipxprotox, 308#endif 309 atalkprotox, NULL }; 310 311static void printproto(struct protox *, const char *); 312static void usage(void); 313static struct protox *name2protox(const char *); 314static struct protox *knownname(const char *); 315 316static kvm_t *kvmd; 317static char *nlistf = NULL, *memf = NULL; 318 319int Aflag; /* show addresses of protocol control block */ 320int aflag; /* show all sockets (including servers) */ 321int Bflag; /* show information about bpf consumers */ 322int bflag; /* show i/f total bytes in/out */ 323int dflag; /* show i/f dropped packets */ 324int gflag; /* show group (multicast) routing or stats */ 325int hflag; /* show counters in human readable format */ 326int iflag; /* show interfaces */ 327int Lflag; /* show size of listen queues */ 328int mflag; /* show memory stats */ 329int numeric_addr; /* show addresses numerically */ 330int numeric_port; /* show ports numerically */ 331static int pflag; /* show given protocol */ 332int rflag; /* show routing tables (or routing stats) */ 333int sflag; /* show protocol statistics */ 334int tflag; /* show i/f watchdog timers */ 335int Wflag; /* wide display */ 336int xflag; /* extra information, includes all socket buffer info */ 337int zflag; /* zero stats */ 338 339int interval; /* repeat interval for i/f stats */ 340 341char *interface; /* desired i/f for stats, or NULL for all i/fs */ 342int unit; /* unit number for above */ 343 344int af; /* address family */ 345int live; /* true if we are examining a live system */ 346 347int 348main(int argc, char *argv[]) 349{ 350 struct protox *tp = NULL; /* for printing cblocks & stats */ 351 int ch; 352 353 af = AF_UNSPEC; 354 355 while ((ch = getopt(argc, argv, "AaBbdf:ghI:iLlM:mN:np:rSstuWw:xz")) != -1) 356 switch(ch) { 357 case 'A': 358 Aflag = 1; 359 break; 360 case 'a': 361 aflag = 1; 362 break; 363 case 'B': 364 Bflag = 1; 365 break; 366 case 'b': 367 bflag = 1; 368 break; 369 case 'd': 370 dflag = 1; 371 break; 372 case 'f': 373 if (strcmp(optarg, "ipx") == 0) 374 af = AF_IPX; 375 else if (strcmp(optarg, "inet") == 0) 376 af = AF_INET; 377#ifdef INET6 378 else if (strcmp(optarg, "inet6") == 0) 379 af = AF_INET6; 380#endif 381#ifdef IPSEC 382 else if (strcmp(optarg, "pfkey") == 0) 383 af = PF_KEY; 384#endif 385 else if (strcmp(optarg, "unix") == 0) 386 af = AF_UNIX; 387 else if (strcmp(optarg, "atalk") == 0) 388 af = AF_APPLETALK; 389#ifdef NETGRAPH 390 else if (strcmp(optarg, "ng") == 0 391 || strcmp(optarg, "netgraph") == 0) 392 af = AF_NETGRAPH; 393#endif 394 else if (strcmp(optarg, "link") == 0) 395 af = AF_LINK; 396 else { 397 errx(1, "%s: unknown address family", optarg); 398 } 399 break; 400 case 'g': 401 gflag = 1; 402 break; 403 case 'h': 404 hflag = 1; 405 break; 406 case 'I': { 407 char *cp; 408 409 iflag = 1; 410 for (cp = interface = optarg; isalpha(*cp); cp++) 411 continue; 412 unit = atoi(cp); 413 break; 414 } 415 case 'i': 416 iflag = 1; 417 break; 418 case 'L': 419 Lflag = 1; 420 break; 421 case 'M': 422 memf = optarg; 423 break; 424 case 'm': 425 mflag = 1; 426 break; 427 case 'N': 428 nlistf = optarg; 429 break; 430 case 'n': 431 numeric_addr = numeric_port = 1; 432 break; 433 case 'p': 434 if ((tp = name2protox(optarg)) == NULL) { 435 errx(1, 436 "%s: unknown or uninstrumented protocol", 437 optarg); 438 } 439 pflag = 1; 440 break; 441 case 'r': 442 rflag = 1; 443 break; 444 case 's': 445 ++sflag; 446 break; 447 case 'S': 448 numeric_addr = 1; 449 break; 450 case 't': 451 tflag = 1; 452 break; 453 case 'u': 454 af = AF_UNIX; 455 break; 456 case 'W': 457 case 'l': 458 Wflag = 1; 459 break; 460 case 'w': 461 interval = atoi(optarg); 462 iflag = 1; 463 break; 464 case 'x': 465 xflag = 1; 466 break; 467 case 'z': 468 zflag = 1; 469 break; 470 case '?': 471 default: 472 usage(); 473 } 474 argv += optind; 475 argc -= optind; 476 477#define BACKWARD_COMPATIBILITY 478#ifdef BACKWARD_COMPATIBILITY 479 if (*argv) { 480 if (isdigit(**argv)) { 481 interval = atoi(*argv); 482 if (interval <= 0) 483 usage(); 484 ++argv; 485 iflag = 1; 486 } 487 if (*argv) { 488 nlistf = *argv; 489 if (*++argv) 490 memf = *argv; 491 } 492 } 493#endif 494 495 /* 496 * Discard setgid privileges if not the running kernel so that bad 497 * guys can't print interesting stuff from kernel memory. 498 */ 499 live = (nlistf == NULL && memf == NULL); 500 if (!live) 501 setgid(getgid()); 502 503 if (Bflag) { 504 if (!live) 505 usage(); 506 bpf_stats(interface); 507 exit(0); 508 } 509 if (mflag) { 510 if (!live) { 511 if (kread(0, NULL, 0) == 0) 512 mbpr(kvmd, nl[N_MBSTAT].n_value); 513 } else 514 mbpr(NULL, 0); 515 exit(0); 516 } 517#if 0 518 /* 519 * Keep file descriptors open to avoid overhead 520 * of open/close on each call to get* routines. 521 */ 522 sethostent(1); 523 setnetent(1); 524#else 525 /* 526 * This does not make sense any more with DNS being default over 527 * the files. Doing a setXXXXent(1) causes a tcp connection to be 528 * used for the queries, which is slower. 529 */ 530#endif 531 kread(0, NULL, 0); 532 if (iflag && !sflag) { 533 intpr(interval, nl[N_IFNET].n_value, NULL); 534 exit(0); 535 } 536 if (rflag) { 537 if (sflag) 538 rt_stats(nl[N_RTSTAT].n_value, nl[N_RTTRASH].n_value); 539 else 540 routepr(nl[N_RTREE].n_value); 541 exit(0); 542 } 543 if (gflag) { 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 ifmalist_dump(); 562 exit(0); 563 } 564 565 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#ifdef IPX 583 if (af == AF_IPX || af == AF_UNSPEC) { 584 for (tp = ipxprotox; tp->pr_name; tp++) 585 printproto(tp, tp->pr_name); 586 } 587#endif /* IPX */ 588 if (af == AF_APPLETALK || af == AF_UNSPEC) 589 for (tp = atalkprotox; tp->pr_name; tp++) 590 printproto(tp, tp->pr_name); 591#ifdef NETGRAPH 592 if (af == AF_NETGRAPH || af == AF_UNSPEC) 593 for (tp = netgraphprotox; tp->pr_name; tp++) 594 printproto(tp, tp->pr_name); 595#endif /* NETGRAPH */ 596 if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag) 597 unixpr(nl[N_UNP_COUNT].n_value, nl[N_UNP_GENCNT].n_value, 598 nl[N_UNP_DHEAD].n_value, nl[N_UNP_SHEAD].n_value); 599 exit(0); 600} 601 602/* 603 * Print out protocol statistics or control blocks (per sflag). 604 * If the interface was not specifically requested, and the symbol 605 * is not in the namelist, ignore this one. 606 */ 607static void 608printproto(tp, name) 609 struct protox *tp; 610 const char *name; 611{ 612 void (*pr)(u_long, const char *, int, int); 613 u_long off; 614 615 if (sflag) { 616 if (iflag) { 617 if (tp->pr_istats) 618 intpr(interval, nl[N_IFNET].n_value, 619 tp->pr_istats); 620 else if (pflag) 621 printf("%s: no per-interface stats routine\n", 622 tp->pr_name); 623 return; 624 } else { 625 pr = tp->pr_stats; 626 if (!pr) { 627 if (pflag) 628 printf("%s: no stats routine\n", 629 tp->pr_name); 630 return; 631 } 632 if (tp->pr_usesysctl && live) 633 off = 0; 634 else if (tp->pr_sindex < 0) { 635 if (pflag) 636 printf( 637 "%s: stats routine doesn't work on cores\n", 638 tp->pr_name); 639 return; 640 } else 641 off = nl[tp->pr_sindex].n_value; 642 } 643 } else { 644 pr = tp->pr_cblocks; 645 if (!pr) { 646 if (pflag) 647 printf("%s: no PCB routine\n", tp->pr_name); 648 return; 649 } 650 if (tp->pr_usesysctl && live) 651 off = 0; 652 else if (tp->pr_index < 0) { 653 if (pflag) 654 printf( 655 "%s: PCB routine doesn't work on cores\n", 656 tp->pr_name); 657 return; 658 } else 659 off = nl[tp->pr_index].n_value; 660 } 661 if (pr != NULL && (off || (live && tp->pr_usesysctl) || 662 af != AF_UNSPEC)) 663 (*pr)(off, name, af, tp->pr_protocol); 664} 665 666/* 667 * Read kernel memory, return 0 on success. 668 */ 669int 670kread(u_long addr, void *buf, size_t size) 671{ 672 char errbuf[_POSIX2_LINE_MAX]; 673 674 if (kvmd == NULL) { 675 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 676 setgid(getgid()); 677 if (kvmd != NULL) { 678 if (kvm_nlist(kvmd, nl) < 0) { 679 if (nlistf) 680 errx(1, "%s: kvm_nlist: %s", nlistf, 681 kvm_geterr(kvmd)); 682 else 683 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd)); 684 } 685 686 if (nl[0].n_type == 0) { 687 if (nlistf) 688 errx(1, "%s: no namelist", nlistf); 689 else 690 errx(1, "no namelist"); 691 } 692 } else { 693 warnx("kvm not available: %s", errbuf); 694 return(-1); 695 } 696 } 697 if (!buf) 698 return (0); 699 if (kvm_read(kvmd, addr, buf, size) != (ssize_t)size) { 700 warnx("%s", kvm_geterr(kvmd)); 701 return (-1); 702 } 703 return (0); 704} 705 706const char * 707plural(uintmax_t n) 708{ 709 return (n != 1 ? "s" : ""); 710} 711 712const char * 713plurales(uintmax_t n) 714{ 715 return (n != 1 ? "es" : ""); 716} 717 718const char * 719pluralies(uintmax_t n) 720{ 721 return (n != 1 ? "ies" : "y"); 722} 723 724/* 725 * Find the protox for the given "well-known" name. 726 */ 727static struct protox * 728knownname(const char *name) 729{ 730 struct protox **tpp, *tp; 731 732 for (tpp = protoprotox; *tpp; tpp++) 733 for (tp = *tpp; tp->pr_name; tp++) 734 if (strcmp(tp->pr_name, name) == 0) 735 return (tp); 736 return (NULL); 737} 738 739/* 740 * Find the protox corresponding to name. 741 */ 742static struct protox * 743name2protox(const char *name) 744{ 745 struct protox *tp; 746 char **alias; /* alias from p->aliases */ 747 struct protoent *p; 748 749 /* 750 * Try to find the name in the list of "well-known" names. If that 751 * fails, check if name is an alias for an Internet protocol. 752 */ 753 if ((tp = knownname(name)) != NULL) 754 return (tp); 755 756 setprotoent(1); /* make protocol lookup cheaper */ 757 while ((p = getprotoent()) != NULL) { 758 /* assert: name not same as p->name */ 759 for (alias = p->p_aliases; *alias; alias++) 760 if (strcmp(name, *alias) == 0) { 761 endprotoent(); 762 return (knownname(p->p_name)); 763 } 764 } 765 endprotoent(); 766 return (NULL); 767} 768 769static void 770usage(void) 771{ 772 (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", 773"usage: netstat [-AaLnSW] [-f protocol_family | -p protocol]\n" 774" [-M core] [-N system]", 775" netstat -i | -I interface [-abdhnt] [-f address_family]\n" 776" [-M core] [-N system]", 777" netstat -w wait [-I interface] [-d] [-M core] [-N system]", 778" netstat -s [-s] [-z] [-f protocol_family | -p protocol] [-M core]", 779" netstat -i | -I interface -s [-f protocol_family | -p protocol]\n" 780" [-M core] [-N system]", 781" netstat -m [-M core] [-N system]", 782" netstat -B [ -I interface]", 783" netstat -r [-AenW] [-f address_family] [-M core] [-N system]", 784" netstat -rs [-s] [-M core] [-N system]", 785" netstat -g [-W] [-f address_family] [-M core] [-N system]", 786" netstat -gs [-s] [-f address_family] [-M core] [-N system]"); 787 exit(1); 788} 789