main.c revision 253083
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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#ifndef lint 31char const copyright[] = 32"@(#) Copyright (c) 1983, 1988, 1993\n\ 33 Regents of the University of California. All rights reserved.\n"; 34#endif /* not lint */ 35 36#if 0 37#ifndef lint 38static char sccsid[] = "@(#)main.c 8.4 (Berkeley) 3/1/94"; 39#endif /* not lint */ 40#endif 41 42#include <sys/cdefs.h> 43__FBSDID("$FreeBSD: head/usr.bin/netstat/main.c 253083 2013-07-09 09:43:03Z ae $"); 44 45#include <sys/param.h> 46#include <sys/file.h> 47#include <sys/protosw.h> 48#include <sys/socket.h> 49#include <sys/socketvar.h> 50 51#include <netinet/in.h> 52 53#ifdef NETGRAPH 54#include <netgraph/ng_socket.h> 55#endif 56 57#include <ctype.h> 58#include <err.h> 59#include <errno.h> 60#include <kvm.h> 61#include <limits.h> 62#include <netdb.h> 63#include <nlist.h> 64#include <paths.h> 65#include <stdint.h> 66#include <stdio.h> 67#include <stdlib.h> 68#include <string.h> 69#include <unistd.h> 70#include "netstat.h" 71 72static struct nlist nl[] = { 73#define N_IFNET 0 74 { .n_name = "_ifnet" }, 75#define N_RTSTAT 1 76 { .n_name = "_rtstat" }, 77#define N_RTREE 2 78 { .n_name = "_rt_tables"}, 79#define N_MRTSTAT 3 80 { .n_name = "_mrtstat" }, 81#define N_MFCHASHTBL 4 82 { .n_name = "_mfchashtbl" }, 83#define N_VIFTABLE 5 84 { .n_name = "_viftable" }, 85#define N_IPX 6 86 { .n_name = "_ipxpcb_list"}, 87#define N_IPXSTAT 7 88 { .n_name = "_ipxstat"}, 89#define N_SPXSTAT 8 90 { .n_name = "_spx_istat"}, 91#define N_DDPSTAT 9 92 { .n_name = "_ddpstat"}, 93#define N_DDPCB 10 94 { .n_name = "_ddpcb"}, 95#define N_NGSOCKS 11 96 { .n_name = "_ngsocklist"}, 97#define N_IP6STAT 12 98 { .n_name = "_ip6stat" }, 99#define N_ICMP6STAT 13 100 { .n_name = "_icmp6stat" }, 101#define N_IPSECSTAT 14 102 { .n_name = "_ipsec4stat" }, 103#define N_IPSEC6STAT 15 104 { .n_name = "_ipsec6stat" }, 105#define N_PIM6STAT 16 106 { .n_name = "_pim6stat" }, 107#define N_MRT6STAT 17 108 { .n_name = "_mrt6stat" }, 109#define N_MF6CTABLE 18 110 { .n_name = "_mf6ctable" }, 111#define N_MIF6TABLE 19 112 { .n_name = "_mif6table" }, 113#define N_PFKEYSTAT 20 114 { .n_name = "_pfkeystat" }, 115#define N_MBSTAT 21 116 { .n_name = "_mbstat" }, 117#define N_MBTYPES 22 118 { .n_name = "_mbtypes" }, 119#define N_NMBCLUSTERS 23 120 { .n_name = "_nmbclusters" }, 121#define N_NMBUFS 24 122 { .n_name = "_nmbufs" }, 123#define N_MBHI 25 124 { .n_name = "_mbuf_hiwm" }, 125#define N_CLHI 26 126 { .n_name = "_clust_hiwm" }, 127#define N_NCPUS 27 128 { .n_name = "_smp_cpus" }, 129#define N_PAGESZ 28 130 { .n_name = "_pagesize" }, 131#define N_MBPSTAT 29 132 { .n_name = "_mb_statpcpu" }, 133#define N_RTTRASH 30 134 { .n_name = "_rttrash" }, 135#define N_MBLO 31 136 { .n_name = "_mbuf_lowm" }, 137#define N_CLLO 32 138 { .n_name = "_clust_lowm" }, 139#define N_CARPSTAT 33 140 { .n_name = "_carpstats" }, 141#define N_PFSYNCSTAT 34 142 { .n_name = "_pfsyncstats" }, 143#define N_AHSTAT 35 144 { .n_name = "_ahstat" }, 145#define N_ESPSTAT 36 146 { .n_name = "_espstat" }, 147#define N_IPCOMPSTAT 37 148 { .n_name = "_ipcompstat" }, 149#define N_TCPSTAT 38 150 { .n_name = "_tcpstat" }, 151#define N_UDPSTAT 39 152 { .n_name = "_udpstat" }, 153#define N_IPSTAT 40 154 { .n_name = "_ipstat" }, 155#define N_ICMPSTAT 41 156 { .n_name = "_icmpstat" }, 157#define N_IGMPSTAT 42 158 { .n_name = "_igmpstat" }, 159#define N_PIMSTAT 43 160 { .n_name = "_pimstat" }, 161#define N_TCBINFO 44 162 { .n_name = "_tcbinfo" }, 163#define N_UDBINFO 45 164 { .n_name = "_udbinfo" }, 165#define N_DIVCBINFO 46 166 { .n_name = "_divcbinfo" }, 167#define N_RIPCBINFO 47 168 { .n_name = "_ripcbinfo" }, 169#define N_UNP_COUNT 48 170 { .n_name = "_unp_count" }, 171#define N_UNP_GENCNT 49 172 { .n_name = "_unp_gencnt" }, 173#define N_UNP_DHEAD 50 174 { .n_name = "_unp_dhead" }, 175#define N_UNP_SHEAD 51 176 { .n_name = "_unp_shead" }, 177#define N_RIP6STAT 52 178 { .n_name = "_rip6stat" }, 179#define N_SCTPSTAT 53 180 { .n_name = "_sctpstat" }, 181#define N_MFCTABLESIZE 54 182 { .n_name = "_mfctablesize" }, 183#define N_ARPSTAT 55 184 { .n_name = "_arpstat" }, 185#define N_UNP_SPHEAD 56 186 { .n_name = "unp_sphead" }, 187 { .n_name = NULL }, 188}; 189 190struct protox { 191 int pr_index; /* index into nlist of cb head */ 192 int pr_sindex; /* index into nlist of stat block */ 193 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 194 void (*pr_cblocks)(u_long, const char *, int, int); 195 /* control blocks printing routine */ 196 void (*pr_stats)(u_long, const char *, int, int); 197 /* statistics printing routine */ 198 void (*pr_istats)(char *); /* per/if statistics printing routine */ 199 const char *pr_name; /* well-known name */ 200 int pr_usesysctl; /* non-zero if we use sysctl, not kvm */ 201 int pr_protocol; 202} protox[] = { 203 { N_TCBINFO, N_TCPSTAT, 1, protopr, 204 tcp_stats, NULL, "tcp", 1, IPPROTO_TCP }, 205 { N_UDBINFO, N_UDPSTAT, 1, protopr, 206 udp_stats, NULL, "udp", 1, IPPROTO_UDP }, 207#ifdef SCTP 208 { -1, N_SCTPSTAT, 1, sctp_protopr, 209 sctp_stats, NULL, "sctp", 1, IPPROTO_SCTP }, 210#endif 211#ifdef SDP 212 { -1, -1, 1, protopr, 213 NULL, NULL, "sdp", 1, IPPROTO_TCP }, 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 SDP 256 { -1, -1, 1, protopr, 257 NULL, NULL, "sdp", 1, IPPROTO_TCP }, 258#endif 259#ifdef IPSEC 260 { -1, N_IPSEC6STAT, 1, NULL, 261 ipsec_stats, NULL, "ipsec6", 0, 0 }, 262#endif 263#ifdef notyet 264 { -1, N_PIM6STAT, 1, NULL, 265 pim6_stats, NULL, "pim6", 1, 0 }, 266#endif 267 { -1, N_RIP6STAT, 1, NULL, 268 rip6_stats, NULL, "rip6", 1, 0 }, 269 { -1, -1, 0, NULL, 270 NULL, NULL, NULL, 0, 0 } 271}; 272#endif /*INET6*/ 273 274#ifdef IPSEC 275struct protox pfkeyprotox[] = { 276 { -1, N_PFKEYSTAT, 1, NULL, 277 pfkey_stats, NULL, "pfkey", 0, 0 }, 278 { -1, -1, 0, NULL, 279 NULL, NULL, NULL, 0, 0 } 280}; 281#endif 282 283struct protox atalkprotox[] = { 284 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, 285 ddp_stats, NULL, "ddp", 0, 0 }, 286 { -1, -1, 0, NULL, 287 NULL, NULL, NULL, 0, 0 } 288}; 289#ifdef NETGRAPH 290struct protox netgraphprotox[] = { 291 { N_NGSOCKS, -1, 1, netgraphprotopr, 292 NULL, NULL, "ctrl", 0, 0 }, 293 { N_NGSOCKS, -1, 1, netgraphprotopr, 294 NULL, NULL, "data", 0, 0 }, 295 { -1, -1, 0, NULL, 296 NULL, NULL, NULL, 0, 0 } 297}; 298#endif 299#ifdef IPX 300struct protox ipxprotox[] = { 301 { N_IPX, N_IPXSTAT, 1, ipxprotopr, 302 ipx_stats, NULL, "ipx", 0, 0 }, 303 { N_IPX, N_SPXSTAT, 1, ipxprotopr, 304 spx_stats, NULL, "spx", 0, 0 }, 305 { -1, -1, 0, NULL, 306 NULL, NULL, 0, 0, 0 } 307}; 308#endif 309 310struct protox *protoprotox[] = { 311 protox, 312#ifdef INET6 313 ip6protox, 314#endif 315#ifdef IPSEC 316 pfkeyprotox, 317#endif 318#ifdef IPX 319 ipxprotox, 320#endif 321 atalkprotox, NULL }; 322 323static void printproto(struct protox *, const char *); 324static void usage(void); 325static struct protox *name2protox(const char *); 326static struct protox *knownname(const char *); 327 328static kvm_t *kvmd; 329static char *nlistf = NULL, *memf = NULL; 330 331int Aflag; /* show addresses of protocol control block */ 332int aflag; /* show all sockets (including servers) */ 333int Bflag; /* show information about bpf consumers */ 334int bflag; /* show i/f total bytes in/out */ 335int dflag; /* show i/f dropped packets */ 336int gflag; /* show group (multicast) routing or stats */ 337int hflag; /* show counters in human readable format */ 338int iflag; /* show interfaces */ 339int Lflag; /* show size of listen queues */ 340int mflag; /* show memory stats */ 341int noutputs = 0; /* how much outputs before we exit */ 342int numeric_addr; /* show addresses numerically */ 343int numeric_port; /* show ports numerically */ 344static int pflag; /* show given protocol */ 345int Qflag; /* show netisr information */ 346int rflag; /* show routing tables (or routing stats) */ 347int sflag; /* show protocol statistics */ 348int Wflag; /* wide display */ 349int Tflag; /* TCP Information */ 350int xflag; /* extra information, includes all socket buffer info */ 351int zflag; /* zero stats */ 352 353int interval; /* repeat interval for i/f stats */ 354 355char *interface; /* desired i/f for stats, or NULL for all i/fs */ 356int unit; /* unit number for above */ 357 358int af; /* address family */ 359int live; /* true if we are examining a live system */ 360 361int 362main(int argc, char *argv[]) 363{ 364 struct protox *tp = NULL; /* for printing cblocks & stats */ 365 int ch; 366 367 af = AF_UNSPEC; 368 369 while ((ch = getopt(argc, argv, "AaBbdf:ghI:iLlM:mN:np:Qq:rSTsuWw:xz")) 370 != -1) 371 switch(ch) { 372 case 'A': 373 Aflag = 1; 374 break; 375 case 'a': 376 aflag = 1; 377 break; 378 case 'B': 379 Bflag = 1; 380 break; 381 case 'b': 382 bflag = 1; 383 break; 384 case 'd': 385 dflag = 1; 386 break; 387 case 'f': 388 if (strcmp(optarg, "ipx") == 0) 389 af = AF_IPX; 390 else if (strcmp(optarg, "inet") == 0) 391 af = AF_INET; 392#ifdef INET6 393 else if (strcmp(optarg, "inet6") == 0) 394 af = AF_INET6; 395#endif 396#ifdef IPSEC 397 else if (strcmp(optarg, "pfkey") == 0) 398 af = PF_KEY; 399#endif 400 else if (strcmp(optarg, "unix") == 0) 401 af = AF_UNIX; 402 else if (strcmp(optarg, "atalk") == 0) 403 af = AF_APPLETALK; 404#ifdef NETGRAPH 405 else if (strcmp(optarg, "ng") == 0 406 || strcmp(optarg, "netgraph") == 0) 407 af = AF_NETGRAPH; 408#endif 409 else if (strcmp(optarg, "link") == 0) 410 af = AF_LINK; 411 else { 412 errx(1, "%s: unknown address family", optarg); 413 } 414 break; 415 case 'g': 416 gflag = 1; 417 break; 418 case 'h': 419 hflag = 1; 420 break; 421 case 'I': { 422 char *cp; 423 424 iflag = 1; 425 for (cp = interface = optarg; isalpha(*cp); cp++) 426 continue; 427 unit = atoi(cp); 428 break; 429 } 430 case 'i': 431 iflag = 1; 432 break; 433 case 'L': 434 Lflag = 1; 435 break; 436 case 'M': 437 memf = optarg; 438 break; 439 case 'm': 440 mflag = 1; 441 break; 442 case 'N': 443 nlistf = optarg; 444 break; 445 case 'n': 446 numeric_addr = numeric_port = 1; 447 break; 448 case 'p': 449 if ((tp = name2protox(optarg)) == NULL) { 450 errx(1, 451 "%s: unknown or uninstrumented protocol", 452 optarg); 453 } 454 pflag = 1; 455 break; 456 case 'Q': 457 Qflag = 1; 458 break; 459 case 'q': 460 noutputs = atoi(optarg); 461 if (noutputs != 0) 462 noutputs++; 463 break; 464 case 'r': 465 rflag = 1; 466 break; 467 case 's': 468 ++sflag; 469 break; 470 case 'S': 471 numeric_addr = 1; 472 break; 473 case 'u': 474 af = AF_UNIX; 475 break; 476 case 'W': 477 case 'l': 478 Wflag = 1; 479 break; 480 case 'w': 481 interval = atoi(optarg); 482 iflag = 1; 483 break; 484 case 'T': 485 Tflag = 1; 486 break; 487 case 'x': 488 xflag = 1; 489 break; 490 case 'z': 491 zflag = 1; 492 break; 493 case '?': 494 default: 495 usage(); 496 } 497 argv += optind; 498 argc -= optind; 499 500#define BACKWARD_COMPATIBILITY 501#ifdef BACKWARD_COMPATIBILITY 502 if (*argv) { 503 if (isdigit(**argv)) { 504 interval = atoi(*argv); 505 if (interval <= 0) 506 usage(); 507 ++argv; 508 iflag = 1; 509 } 510 if (*argv) { 511 nlistf = *argv; 512 if (*++argv) 513 memf = *argv; 514 } 515 } 516#endif 517 518 /* 519 * Discard setgid privileges if not the running kernel so that bad 520 * guys can't print interesting stuff from kernel memory. 521 */ 522 live = (nlistf == NULL && memf == NULL); 523 if (!live) 524 setgid(getgid()); 525 526 if (xflag && Tflag) 527 errx(1, "-x and -T are incompatible, pick one."); 528 529 if (Bflag) { 530 if (!live) 531 usage(); 532 bpf_stats(interface); 533 exit(0); 534 } 535 if (mflag) { 536 if (!live) { 537 if (kread(0, NULL, 0) == 0) 538 mbpr(kvmd, nl[N_MBSTAT].n_value); 539 } else 540 mbpr(NULL, 0); 541 exit(0); 542 } 543 if (Qflag) { 544 if (!live) { 545 if (kread(0, NULL, 0) == 0) 546 netisr_stats(kvmd); 547 } else 548 netisr_stats(NULL); 549 exit(0); 550 } 551#if 0 552 /* 553 * Keep file descriptors open to avoid overhead 554 * of open/close on each call to get* routines. 555 */ 556 sethostent(1); 557 setnetent(1); 558#else 559 /* 560 * This does not make sense any more with DNS being default over 561 * the files. Doing a setXXXXent(1) causes a tcp connection to be 562 * used for the queries, which is slower. 563 */ 564#endif 565 kread(0, NULL, 0); 566 if (iflag && !sflag) { 567 intpr(interval, nl[N_IFNET].n_value, NULL); 568 exit(0); 569 } 570 if (rflag) { 571 if (sflag) 572 rt_stats(nl[N_RTSTAT].n_value, nl[N_RTTRASH].n_value); 573 else 574 routepr(nl[N_RTREE].n_value); 575 exit(0); 576 } 577 if (gflag) { 578 if (sflag) { 579 if (af == AF_INET || af == AF_UNSPEC) 580 mrt_stats(nl[N_MRTSTAT].n_value); 581#ifdef INET6 582 if (af == AF_INET6 || af == AF_UNSPEC) 583 mrt6_stats(nl[N_MRT6STAT].n_value); 584#endif 585 } else { 586 if (af == AF_INET || af == AF_UNSPEC) 587 mroutepr(nl[N_MFCHASHTBL].n_value, 588 nl[N_MFCTABLESIZE].n_value, 589 nl[N_VIFTABLE].n_value); 590#ifdef INET6 591 if (af == AF_INET6 || af == AF_UNSPEC) 592 mroute6pr(nl[N_MF6CTABLE].n_value, 593 nl[N_MIF6TABLE].n_value); 594#endif 595 } 596 exit(0); 597 } 598 599 if (tp) { 600 printproto(tp, tp->pr_name); 601 exit(0); 602 } 603 if (af == AF_INET || af == AF_UNSPEC) 604 for (tp = protox; tp->pr_name; tp++) 605 printproto(tp, tp->pr_name); 606#ifdef INET6 607 if (af == AF_INET6 || af == AF_UNSPEC) 608 for (tp = ip6protox; tp->pr_name; tp++) 609 printproto(tp, tp->pr_name); 610#endif /*INET6*/ 611#ifdef IPSEC 612 if (af == PF_KEY || af == AF_UNSPEC) 613 for (tp = pfkeyprotox; tp->pr_name; tp++) 614 printproto(tp, tp->pr_name); 615#endif /*IPSEC*/ 616#ifdef IPX 617 if (af == AF_IPX || af == AF_UNSPEC) { 618 for (tp = ipxprotox; tp->pr_name; tp++) 619 printproto(tp, tp->pr_name); 620 } 621#endif /* IPX */ 622 if (af == AF_APPLETALK || af == AF_UNSPEC) 623 for (tp = atalkprotox; tp->pr_name; tp++) 624 printproto(tp, tp->pr_name); 625#ifdef NETGRAPH 626 if (af == AF_NETGRAPH || af == AF_UNSPEC) 627 for (tp = netgraphprotox; tp->pr_name; tp++) 628 printproto(tp, tp->pr_name); 629#endif /* NETGRAPH */ 630 if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag) 631 unixpr(nl[N_UNP_COUNT].n_value, nl[N_UNP_GENCNT].n_value, 632 nl[N_UNP_DHEAD].n_value, nl[N_UNP_SHEAD].n_value, 633 nl[N_UNP_SPHEAD].n_value); 634 exit(0); 635} 636 637/* 638 * Print out protocol statistics or control blocks (per sflag). 639 * If the interface was not specifically requested, and the symbol 640 * is not in the namelist, ignore this one. 641 */ 642static void 643printproto(struct protox *tp, const char *name) 644{ 645 void (*pr)(u_long, const char *, int, int); 646 u_long off; 647 648 if (sflag) { 649 if (iflag) { 650 if (tp->pr_istats) 651 intpr(interval, nl[N_IFNET].n_value, 652 tp->pr_istats); 653 else if (pflag) 654 printf("%s: no per-interface stats routine\n", 655 tp->pr_name); 656 return; 657 } else { 658 pr = tp->pr_stats; 659 if (!pr) { 660 if (pflag) 661 printf("%s: no stats routine\n", 662 tp->pr_name); 663 return; 664 } 665 if (tp->pr_usesysctl && live) 666 off = 0; 667 else if (tp->pr_sindex < 0) { 668 if (pflag) 669 printf( 670 "%s: stats routine doesn't work on cores\n", 671 tp->pr_name); 672 return; 673 } else 674 off = nl[tp->pr_sindex].n_value; 675 } 676 } else { 677 pr = tp->pr_cblocks; 678 if (!pr) { 679 if (pflag) 680 printf("%s: no PCB routine\n", tp->pr_name); 681 return; 682 } 683 if (tp->pr_usesysctl && live) 684 off = 0; 685 else if (tp->pr_index < 0) { 686 if (pflag) 687 printf( 688 "%s: PCB routine doesn't work on cores\n", 689 tp->pr_name); 690 return; 691 } else 692 off = nl[tp->pr_index].n_value; 693 } 694 if (pr != NULL && (off || (live && tp->pr_usesysctl) || 695 af != AF_UNSPEC)) 696 (*pr)(off, name, af, tp->pr_protocol); 697} 698 699static int 700kvmd_init(void) 701{ 702 char errbuf[_POSIX2_LINE_MAX]; 703 704 if (kvmd != NULL) 705 return (0); 706 707 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 708 setgid(getgid()); 709 710 if (kvmd == NULL) { 711 warnx("kvm not available: %s", errbuf); 712 return (-1); 713 } 714 715 if (kvm_nlist(kvmd, nl) < 0) { 716 if (nlistf) 717 errx(1, "%s: kvm_nlist: %s", nlistf, 718 kvm_geterr(kvmd)); 719 else 720 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd)); 721 } 722 723 if (nl[0].n_type == 0) { 724 if (nlistf) 725 errx(1, "%s: no namelist", nlistf); 726 else 727 errx(1, "no namelist"); 728 } 729 730 return (0); 731} 732 733/* 734 * Read kernel memory, return 0 on success. 735 */ 736int 737kread(u_long addr, void *buf, size_t size) 738{ 739 740 if (kvmd_init() < 0) 741 return (-1); 742 743 if (!buf) 744 return (0); 745 if (kvm_read(kvmd, addr, buf, size) != (ssize_t)size) { 746 warnx("%s", kvm_geterr(kvmd)); 747 return (-1); 748 } 749 return (0); 750} 751 752/* 753 * Read an array of N counters in kernel memory into array of N uint64_t's. 754 */ 755int 756kread_counters(u_long addr, void *buf, size_t size) 757{ 758 uint64_t *c = buf; 759 760 if (kvmd_init() < 0) 761 return (-1); 762 763 if (kread(addr, buf, size) < 0) 764 return (-1); 765 766 while (size != 0) { 767 *c = kvm_counter_u64_fetch(kvmd, *c); 768 size -= sizeof(*c); 769 c++; 770 } 771 return (0); 772} 773 774const char * 775plural(uintmax_t n) 776{ 777 return (n != 1 ? "s" : ""); 778} 779 780const char * 781plurales(uintmax_t n) 782{ 783 return (n != 1 ? "es" : ""); 784} 785 786const char * 787pluralies(uintmax_t n) 788{ 789 return (n != 1 ? "ies" : "y"); 790} 791 792/* 793 * Find the protox for the given "well-known" name. 794 */ 795static struct protox * 796knownname(const char *name) 797{ 798 struct protox **tpp, *tp; 799 800 for (tpp = protoprotox; *tpp; tpp++) 801 for (tp = *tpp; tp->pr_name; tp++) 802 if (strcmp(tp->pr_name, name) == 0) 803 return (tp); 804 return (NULL); 805} 806 807/* 808 * Find the protox corresponding to name. 809 */ 810static struct protox * 811name2protox(const char *name) 812{ 813 struct protox *tp; 814 char **alias; /* alias from p->aliases */ 815 struct protoent *p; 816 817 /* 818 * Try to find the name in the list of "well-known" names. If that 819 * fails, check if name is an alias for an Internet protocol. 820 */ 821 if ((tp = knownname(name)) != NULL) 822 return (tp); 823 824 setprotoent(1); /* make protocol lookup cheaper */ 825 while ((p = getprotoent()) != NULL) { 826 /* assert: name not same as p->name */ 827 for (alias = p->p_aliases; *alias; alias++) 828 if (strcmp(name, *alias) == 0) { 829 endprotoent(); 830 return (knownname(p->p_name)); 831 } 832 } 833 endprotoent(); 834 return (NULL); 835} 836 837static void 838usage(void) 839{ 840 (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%s\n", 841"usage: netstat [-AaLnSTWx] [-f protocol_family | -p protocol]\n" 842" [-M core] [-N system]", 843" netstat -i | -I interface [-abdhnW] [-f address_family]\n" 844" [-M core] [-N system]", 845" netstat -w wait [-I interface] [-d] [-M core] [-N system] [-q howmany]", 846" netstat -s [-s] [-z] [-f protocol_family | -p protocol]\n" 847" [-M core] [-N system]", 848" netstat -i | -I interface -s [-f protocol_family | -p protocol]\n" 849" [-M core] [-N system]", 850" netstat -m [-M core] [-N system]", 851" netstat -B [-I interface]", 852" netstat -r [-AanW] [-f address_family] [-M core] [-N system]", 853" netstat -rs [-s] [-M core] [-N system]", 854" netstat -g [-W] [-f address_family] [-M core] [-N system]", 855" netstat -gs [-s] [-f address_family] [-M core] [-N system]", 856" netstat -Q"); 857 exit(1); 858} 859