main.c revision 199993
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 199993 2009-12-01 15:18:25Z jhb $"); 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_MFCHASHTBL 4 86 { .n_name = "_mfchashtbl" }, 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#define N_MFCTABLESIZE 54 186 { .n_name = "_mfctablesize" }, 187#define N_ARPSTAT 55 188 { .n_name = "_arpstat" }, 189#define N_UNP_SPHEAD 56 190 { .n_name = "unp_sphead" }, 191 { .n_name = NULL }, 192}; 193 194struct protox { 195 int pr_index; /* index into nlist of cb head */ 196 int pr_sindex; /* index into nlist of stat block */ 197 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 198 void (*pr_cblocks)(u_long, const char *, int, int); 199 /* control blocks printing routine */ 200 void (*pr_stats)(u_long, const char *, int, int); 201 /* statistics printing routine */ 202 void (*pr_istats)(char *); /* per/if statistics printing routine */ 203 const char *pr_name; /* well-known name */ 204 int pr_usesysctl; /* non-zero if we use sysctl, not kvm */ 205 int pr_protocol; 206} protox[] = { 207 { N_TCBINFO, N_TCPSTAT, 1, protopr, 208 tcp_stats, NULL, "tcp", 1, IPPROTO_TCP }, 209 { N_UDBINFO, N_UDPSTAT, 1, protopr, 210 udp_stats, NULL, "udp", 1, IPPROTO_UDP }, 211#ifdef SCTP 212 { -1, N_SCTPSTAT, 1, sctp_protopr, 213 sctp_stats, NULL, "sctp", 1, IPPROTO_SCTP }, 214#endif 215 { N_DIVCBINFO, -1, 1, protopr, 216 NULL, NULL, "divert", 1, IPPROTO_DIVERT }, 217 { N_RIPCBINFO, N_IPSTAT, 1, protopr, 218 ip_stats, NULL, "ip", 1, IPPROTO_RAW }, 219 { N_RIPCBINFO, N_ICMPSTAT, 1, protopr, 220 icmp_stats, NULL, "icmp", 1, IPPROTO_ICMP }, 221 { N_RIPCBINFO, N_IGMPSTAT, 1, protopr, 222 igmp_stats, NULL, "igmp", 1, IPPROTO_IGMP }, 223#ifdef IPSEC 224 { -1, N_IPSECSTAT, 1, NULL, /* keep as compat */ 225 ipsec_stats, NULL, "ipsec", 0, 0}, 226 { -1, N_AHSTAT, 1, NULL, 227 ah_stats, NULL, "ah", 0, 0}, 228 { -1, N_ESPSTAT, 1, NULL, 229 esp_stats, NULL, "esp", 0, 0}, 230 { -1, N_IPCOMPSTAT, 1, NULL, 231 ipcomp_stats, NULL, "ipcomp", 0, 0}, 232#endif 233 { N_RIPCBINFO, N_PIMSTAT, 1, protopr, 234 pim_stats, NULL, "pim", 1, IPPROTO_PIM }, 235 { -1, N_CARPSTAT, 1, NULL, 236 carp_stats, NULL, "carp", 1, 0 }, 237 { -1, N_PFSYNCSTAT, 1, NULL, 238 pfsync_stats, NULL, "pfsync", 1, 0 }, 239 { -1, N_ARPSTAT, 1, NULL, 240 arp_stats, NULL, "arp", 1, 0 }, 241 { -1, -1, 0, NULL, 242 NULL, NULL, NULL, 0, 0 } 243}; 244 245#ifdef INET6 246struct protox ip6protox[] = { 247 { N_TCBINFO, N_TCPSTAT, 1, protopr, 248 tcp_stats, NULL, "tcp", 1, IPPROTO_TCP }, 249 { N_UDBINFO, N_UDPSTAT, 1, protopr, 250 udp_stats, NULL, "udp", 1, IPPROTO_UDP }, 251 { N_RIPCBINFO, N_IP6STAT, 1, protopr, 252 ip6_stats, ip6_ifstats, "ip6", 1, IPPROTO_RAW }, 253 { N_RIPCBINFO, N_ICMP6STAT, 1, protopr, 254 icmp6_stats, icmp6_ifstats, "icmp6", 1, IPPROTO_ICMPV6 }, 255#ifdef IPSEC 256 { -1, N_IPSEC6STAT, 1, NULL, 257 ipsec_stats, NULL, "ipsec6", 0, 0 }, 258#endif 259#ifdef notyet 260 { -1, N_PIM6STAT, 1, NULL, 261 pim6_stats, NULL, "pim6", 1, 0 }, 262#endif 263 { -1, N_RIP6STAT, 1, NULL, 264 rip6_stats, NULL, "rip6", 1, 0 }, 265 { -1, -1, 0, NULL, 266 NULL, NULL, NULL, 0, 0 } 267}; 268#endif /*INET6*/ 269 270#ifdef IPSEC 271struct protox pfkeyprotox[] = { 272 { -1, N_PFKEYSTAT, 1, NULL, 273 pfkey_stats, NULL, "pfkey", 0, 0 }, 274 { -1, -1, 0, NULL, 275 NULL, NULL, NULL, 0, 0 } 276}; 277#endif 278 279struct protox atalkprotox[] = { 280 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, 281 ddp_stats, NULL, "ddp", 0, 0 }, 282 { -1, -1, 0, NULL, 283 NULL, NULL, NULL, 0, 0 } 284}; 285#ifdef NETGRAPH 286struct protox netgraphprotox[] = { 287 { N_NGSOCKS, -1, 1, netgraphprotopr, 288 NULL, NULL, "ctrl", 0, 0 }, 289 { N_NGSOCKS, -1, 1, netgraphprotopr, 290 NULL, NULL, "data", 0, 0 }, 291 { -1, -1, 0, NULL, 292 NULL, NULL, NULL, 0, 0 } 293}; 294#endif 295#ifdef IPX 296struct protox ipxprotox[] = { 297 { N_IPX, N_IPXSTAT, 1, ipxprotopr, 298 ipx_stats, NULL, "ipx", 0, 0 }, 299 { N_IPX, N_SPXSTAT, 1, ipxprotopr, 300 spx_stats, NULL, "spx", 0, 0 }, 301 { -1, -1, 0, NULL, 302 NULL, NULL, 0, 0, 0 } 303}; 304#endif 305 306struct protox *protoprotox[] = { 307 protox, 308#ifdef INET6 309 ip6protox, 310#endif 311#ifdef IPSEC 312 pfkeyprotox, 313#endif 314#ifdef IPX 315 ipxprotox, 316#endif 317 atalkprotox, NULL }; 318 319static void printproto(struct protox *, const char *); 320static void usage(void); 321static struct protox *name2protox(const char *); 322static struct protox *knownname(const char *); 323 324static kvm_t *kvmd; 325static char *nlistf = NULL, *memf = NULL; 326 327int Aflag; /* show addresses of protocol control block */ 328int aflag; /* show all sockets (including servers) */ 329int Bflag; /* show information about bpf consumers */ 330int bflag; /* show i/f total bytes in/out */ 331int dflag; /* show i/f dropped packets */ 332int gflag; /* show group (multicast) routing or stats */ 333int hflag; /* show counters in human readable format */ 334int iflag; /* show interfaces */ 335int Lflag; /* show size of listen queues */ 336int mflag; /* show memory stats */ 337int numeric_addr; /* show addresses numerically */ 338int numeric_port; /* show ports numerically */ 339static int pflag; /* show given protocol */ 340int rflag; /* show routing tables (or routing stats) */ 341int sflag; /* show protocol statistics */ 342int Wflag; /* wide display */ 343int xflag; /* extra information, includes all socket buffer info */ 344int zflag; /* zero stats */ 345 346int interval; /* repeat interval for i/f stats */ 347 348char *interface; /* desired i/f for stats, or NULL for all i/fs */ 349int unit; /* unit number for above */ 350 351int af; /* address family */ 352int live; /* true if we are examining a live system */ 353 354int 355main(int argc, char *argv[]) 356{ 357 struct protox *tp = NULL; /* for printing cblocks & stats */ 358 int ch; 359 360 af = AF_UNSPEC; 361 362 while ((ch = getopt(argc, argv, "AaBbdf:ghI:iLlM:mN:np:rSsuWw:xz")) != -1) 363 switch(ch) { 364 case 'A': 365 Aflag = 1; 366 break; 367 case 'a': 368 aflag = 1; 369 break; 370 case 'B': 371 Bflag = 1; 372 break; 373 case 'b': 374 bflag = 1; 375 break; 376 case 'd': 377 dflag = 1; 378 break; 379 case 'f': 380 if (strcmp(optarg, "ipx") == 0) 381 af = AF_IPX; 382 else if (strcmp(optarg, "inet") == 0) 383 af = AF_INET; 384#ifdef INET6 385 else if (strcmp(optarg, "inet6") == 0) 386 af = AF_INET6; 387#endif 388#ifdef IPSEC 389 else if (strcmp(optarg, "pfkey") == 0) 390 af = PF_KEY; 391#endif 392 else if (strcmp(optarg, "unix") == 0) 393 af = AF_UNIX; 394 else if (strcmp(optarg, "atalk") == 0) 395 af = AF_APPLETALK; 396#ifdef NETGRAPH 397 else if (strcmp(optarg, "ng") == 0 398 || strcmp(optarg, "netgraph") == 0) 399 af = AF_NETGRAPH; 400#endif 401 else if (strcmp(optarg, "link") == 0) 402 af = AF_LINK; 403 else { 404 errx(1, "%s: unknown address family", optarg); 405 } 406 break; 407 case 'g': 408 gflag = 1; 409 break; 410 case 'h': 411 hflag = 1; 412 break; 413 case 'I': { 414 char *cp; 415 416 iflag = 1; 417 for (cp = interface = optarg; isalpha(*cp); cp++) 418 continue; 419 unit = atoi(cp); 420 break; 421 } 422 case 'i': 423 iflag = 1; 424 break; 425 case 'L': 426 Lflag = 1; 427 break; 428 case 'M': 429 memf = optarg; 430 break; 431 case 'm': 432 mflag = 1; 433 break; 434 case 'N': 435 nlistf = optarg; 436 break; 437 case 'n': 438 numeric_addr = numeric_port = 1; 439 break; 440 case 'p': 441 if ((tp = name2protox(optarg)) == NULL) { 442 errx(1, 443 "%s: unknown or uninstrumented protocol", 444 optarg); 445 } 446 pflag = 1; 447 break; 448 case 'r': 449 rflag = 1; 450 break; 451 case 's': 452 ++sflag; 453 break; 454 case 'S': 455 numeric_addr = 1; 456 break; 457 case 'u': 458 af = AF_UNIX; 459 break; 460 case 'W': 461 case 'l': 462 Wflag = 1; 463 break; 464 case 'w': 465 interval = atoi(optarg); 466 iflag = 1; 467 break; 468 case 'x': 469 xflag = 1; 470 break; 471 case 'z': 472 zflag = 1; 473 break; 474 case '?': 475 default: 476 usage(); 477 } 478 argv += optind; 479 argc -= optind; 480 481#define BACKWARD_COMPATIBILITY 482#ifdef BACKWARD_COMPATIBILITY 483 if (*argv) { 484 if (isdigit(**argv)) { 485 interval = atoi(*argv); 486 if (interval <= 0) 487 usage(); 488 ++argv; 489 iflag = 1; 490 } 491 if (*argv) { 492 nlistf = *argv; 493 if (*++argv) 494 memf = *argv; 495 } 496 } 497#endif 498 499 /* 500 * Discard setgid privileges if not the running kernel so that bad 501 * guys can't print interesting stuff from kernel memory. 502 */ 503 live = (nlistf == NULL && memf == NULL); 504 if (!live) 505 setgid(getgid()); 506 507 if (Bflag) { 508 if (!live) 509 usage(); 510 bpf_stats(interface); 511 exit(0); 512 } 513 if (mflag) { 514 if (!live) { 515 if (kread(0, NULL, 0) == 0) 516 mbpr(kvmd, nl[N_MBSTAT].n_value); 517 } else 518 mbpr(NULL, 0); 519 exit(0); 520 } 521#if 0 522 /* 523 * Keep file descriptors open to avoid overhead 524 * of open/close on each call to get* routines. 525 */ 526 sethostent(1); 527 setnetent(1); 528#else 529 /* 530 * This does not make sense any more with DNS being default over 531 * the files. Doing a setXXXXent(1) causes a tcp connection to be 532 * used for the queries, which is slower. 533 */ 534#endif 535 kread(0, NULL, 0); 536 if (iflag && !sflag) { 537 intpr(interval, nl[N_IFNET].n_value, NULL); 538 exit(0); 539 } 540 if (rflag) { 541 if (sflag) 542 rt_stats(nl[N_RTSTAT].n_value, nl[N_RTTRASH].n_value); 543 else 544 routepr(nl[N_RTREE].n_value); 545 exit(0); 546 } 547 if (gflag) { 548 if (sflag) { 549 if (af == AF_INET || af == AF_UNSPEC) 550 mrt_stats(nl[N_MRTSTAT].n_value); 551#ifdef INET6 552 if (af == AF_INET6 || af == AF_UNSPEC) 553 mrt6_stats(nl[N_MRT6STAT].n_value); 554#endif 555 } else { 556 if (af == AF_INET || af == AF_UNSPEC) 557 mroutepr(nl[N_MFCHASHTBL].n_value, 558 nl[N_MFCTABLESIZE].n_value, 559 nl[N_VIFTABLE].n_value); 560#ifdef INET6 561 if (af == AF_INET6 || af == AF_UNSPEC) 562 mroute6pr(nl[N_MF6CTABLE].n_value, 563 nl[N_MIF6TABLE].n_value); 564#endif 565 } 566 exit(0); 567 } 568 569 if (tp) { 570 printproto(tp, tp->pr_name); 571 exit(0); 572 } 573 if (af == AF_INET || af == AF_UNSPEC) 574 for (tp = protox; tp->pr_name; tp++) 575 printproto(tp, tp->pr_name); 576#ifdef INET6 577 if (af == AF_INET6 || af == AF_UNSPEC) 578 for (tp = ip6protox; tp->pr_name; tp++) 579 printproto(tp, tp->pr_name); 580#endif /*INET6*/ 581#ifdef IPSEC 582 if (af == PF_KEY || af == AF_UNSPEC) 583 for (tp = pfkeyprotox; tp->pr_name; tp++) 584 printproto(tp, tp->pr_name); 585#endif /*IPSEC*/ 586#ifdef IPX 587 if (af == AF_IPX || af == AF_UNSPEC) { 588 for (tp = ipxprotox; tp->pr_name; tp++) 589 printproto(tp, tp->pr_name); 590 } 591#endif /* IPX */ 592 if (af == AF_APPLETALK || af == AF_UNSPEC) 593 for (tp = atalkprotox; tp->pr_name; tp++) 594 printproto(tp, tp->pr_name); 595#ifdef NETGRAPH 596 if (af == AF_NETGRAPH || af == AF_UNSPEC) 597 for (tp = netgraphprotox; tp->pr_name; tp++) 598 printproto(tp, tp->pr_name); 599#endif /* NETGRAPH */ 600 if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag) 601 unixpr(nl[N_UNP_COUNT].n_value, nl[N_UNP_GENCNT].n_value, 602 nl[N_UNP_DHEAD].n_value, nl[N_UNP_SHEAD].n_value, 603 nl[N_UNP_SPHEAD].n_value); 604 exit(0); 605} 606 607/* 608 * Print out protocol statistics or control blocks (per sflag). 609 * If the interface was not specifically requested, and the symbol 610 * is not in the namelist, ignore this one. 611 */ 612static void 613printproto(tp, name) 614 struct protox *tp; 615 const char *name; 616{ 617 void (*pr)(u_long, const char *, int, int); 618 u_long off; 619 620 if (sflag) { 621 if (iflag) { 622 if (tp->pr_istats) 623 intpr(interval, nl[N_IFNET].n_value, 624 tp->pr_istats); 625 else if (pflag) 626 printf("%s: no per-interface stats routine\n", 627 tp->pr_name); 628 return; 629 } else { 630 pr = tp->pr_stats; 631 if (!pr) { 632 if (pflag) 633 printf("%s: no stats routine\n", 634 tp->pr_name); 635 return; 636 } 637 if (tp->pr_usesysctl && live) 638 off = 0; 639 else if (tp->pr_sindex < 0) { 640 if (pflag) 641 printf( 642 "%s: stats routine doesn't work on cores\n", 643 tp->pr_name); 644 return; 645 } else 646 off = nl[tp->pr_sindex].n_value; 647 } 648 } else { 649 pr = tp->pr_cblocks; 650 if (!pr) { 651 if (pflag) 652 printf("%s: no PCB routine\n", tp->pr_name); 653 return; 654 } 655 if (tp->pr_usesysctl && live) 656 off = 0; 657 else if (tp->pr_index < 0) { 658 if (pflag) 659 printf( 660 "%s: PCB routine doesn't work on cores\n", 661 tp->pr_name); 662 return; 663 } else 664 off = nl[tp->pr_index].n_value; 665 } 666 if (pr != NULL && (off || (live && tp->pr_usesysctl) || 667 af != AF_UNSPEC)) 668 (*pr)(off, name, af, tp->pr_protocol); 669} 670 671/* 672 * Read kernel memory, return 0 on success. 673 */ 674int 675kread(u_long addr, void *buf, size_t size) 676{ 677 char errbuf[_POSIX2_LINE_MAX]; 678 679 if (kvmd == NULL) { 680 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 681 setgid(getgid()); 682 if (kvmd != NULL) { 683 if (kvm_nlist(kvmd, nl) < 0) { 684 if (nlistf) 685 errx(1, "%s: kvm_nlist: %s", nlistf, 686 kvm_geterr(kvmd)); 687 else 688 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd)); 689 } 690 691 if (nl[0].n_type == 0) { 692 if (nlistf) 693 errx(1, "%s: no namelist", nlistf); 694 else 695 errx(1, "no namelist"); 696 } 697 } else { 698 warnx("kvm not available: %s", errbuf); 699 return(-1); 700 } 701 } 702 if (!buf) 703 return (0); 704 if (kvm_read(kvmd, addr, buf, size) != (ssize_t)size) { 705 warnx("%s", kvm_geterr(kvmd)); 706 return (-1); 707 } 708 return (0); 709} 710 711const char * 712plural(uintmax_t n) 713{ 714 return (n != 1 ? "s" : ""); 715} 716 717const char * 718plurales(uintmax_t n) 719{ 720 return (n != 1 ? "es" : ""); 721} 722 723const char * 724pluralies(uintmax_t n) 725{ 726 return (n != 1 ? "ies" : "y"); 727} 728 729/* 730 * Find the protox for the given "well-known" name. 731 */ 732static struct protox * 733knownname(const char *name) 734{ 735 struct protox **tpp, *tp; 736 737 for (tpp = protoprotox; *tpp; tpp++) 738 for (tp = *tpp; tp->pr_name; tp++) 739 if (strcmp(tp->pr_name, name) == 0) 740 return (tp); 741 return (NULL); 742} 743 744/* 745 * Find the protox corresponding to name. 746 */ 747static struct protox * 748name2protox(const char *name) 749{ 750 struct protox *tp; 751 char **alias; /* alias from p->aliases */ 752 struct protoent *p; 753 754 /* 755 * Try to find the name in the list of "well-known" names. If that 756 * fails, check if name is an alias for an Internet protocol. 757 */ 758 if ((tp = knownname(name)) != NULL) 759 return (tp); 760 761 setprotoent(1); /* make protocol lookup cheaper */ 762 while ((p = getprotoent()) != NULL) { 763 /* assert: name not same as p->name */ 764 for (alias = p->p_aliases; *alias; alias++) 765 if (strcmp(name, *alias) == 0) { 766 endprotoent(); 767 return (knownname(p->p_name)); 768 } 769 } 770 endprotoent(); 771 return (NULL); 772} 773 774static void 775usage(void) 776{ 777 (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", 778"usage: netstat [-AaLnSWx] [-f protocol_family | -p protocol]\n" 779" [-M core] [-N system]", 780" netstat -i | -I interface [-abdhnW] [-f address_family]\n" 781" [-M core] [-N system]", 782" netstat -w wait [-I interface] [-d] [-M core] [-N system]", 783" netstat -s [-s] [-z] [-f protocol_family | -p protocol]\n" 784" [-M core] [-N system]", 785" netstat -i | -I interface -s [-f protocol_family | -p protocol]\n" 786" [-M core] [-N system]", 787" netstat -m [-M core] [-N system]", 788" netstat -B [-I interface]", 789" netstat -r [-AanW] [-f address_family] [-M core] [-N system]", 790" netstat -rs [-s] [-M core] [-N system]", 791" netstat -g [-W] [-f address_family] [-M core] [-N system]", 792" netstat -gs [-s] [-f address_family] [-M core] [-N system]"); 793 exit(1); 794} 795