main.c revision 253351
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 253351 2013-07-15 06:16:57Z 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#define N_SFSTAT 57 188 { .n_name = "_sfstat"}, 189 { .n_name = NULL }, 190}; 191 192struct protox { 193 int pr_index; /* index into nlist of cb head */ 194 int pr_sindex; /* index into nlist of stat block */ 195 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 196 void (*pr_cblocks)(u_long, const char *, int, int); 197 /* control blocks printing routine */ 198 void (*pr_stats)(u_long, const char *, int, int); 199 /* statistics printing routine */ 200 void (*pr_istats)(char *); /* per/if statistics printing routine */ 201 const char *pr_name; /* well-known name */ 202 int pr_usesysctl; /* non-zero if we use sysctl, not kvm */ 203 int pr_protocol; 204} protox[] = { 205 { N_TCBINFO, N_TCPSTAT, 1, protopr, 206 tcp_stats, NULL, "tcp", 1, IPPROTO_TCP }, 207 { N_UDBINFO, N_UDPSTAT, 1, protopr, 208 udp_stats, NULL, "udp", 1, IPPROTO_UDP }, 209#ifdef SCTP 210 { -1, N_SCTPSTAT, 1, sctp_protopr, 211 sctp_stats, NULL, "sctp", 1, IPPROTO_SCTP }, 212#endif 213#ifdef SDP 214 { -1, -1, 1, protopr, 215 NULL, NULL, "sdp", 1, IPPROTO_TCP }, 216#endif 217 { N_DIVCBINFO, -1, 1, protopr, 218 NULL, NULL, "divert", 1, IPPROTO_DIVERT }, 219 { N_RIPCBINFO, N_IPSTAT, 1, protopr, 220 ip_stats, NULL, "ip", 1, IPPROTO_RAW }, 221 { N_RIPCBINFO, N_ICMPSTAT, 1, protopr, 222 icmp_stats, NULL, "icmp", 1, IPPROTO_ICMP }, 223 { N_RIPCBINFO, N_IGMPSTAT, 1, protopr, 224 igmp_stats, NULL, "igmp", 1, IPPROTO_IGMP }, 225#ifdef IPSEC 226 { -1, N_IPSECSTAT, 1, NULL, /* keep as compat */ 227 ipsec_stats, NULL, "ipsec", 0, 0}, 228 { -1, N_AHSTAT, 1, NULL, 229 ah_stats, NULL, "ah", 0, 0}, 230 { -1, N_ESPSTAT, 1, NULL, 231 esp_stats, NULL, "esp", 0, 0}, 232 { -1, N_IPCOMPSTAT, 1, NULL, 233 ipcomp_stats, NULL, "ipcomp", 0, 0}, 234#endif 235 { N_RIPCBINFO, N_PIMSTAT, 1, protopr, 236 pim_stats, NULL, "pim", 1, IPPROTO_PIM }, 237 { -1, N_CARPSTAT, 1, NULL, 238 carp_stats, NULL, "carp", 1, 0 }, 239 { -1, N_PFSYNCSTAT, 1, NULL, 240 pfsync_stats, NULL, "pfsync", 1, 0 }, 241 { -1, N_ARPSTAT, 1, NULL, 242 arp_stats, NULL, "arp", 1, 0 }, 243 { -1, -1, 0, NULL, 244 NULL, NULL, NULL, 0, 0 } 245}; 246 247#ifdef INET6 248struct protox ip6protox[] = { 249 { N_TCBINFO, N_TCPSTAT, 1, protopr, 250 tcp_stats, NULL, "tcp", 1, IPPROTO_TCP }, 251 { N_UDBINFO, N_UDPSTAT, 1, protopr, 252 udp_stats, NULL, "udp", 1, IPPROTO_UDP }, 253 { N_RIPCBINFO, N_IP6STAT, 1, protopr, 254 ip6_stats, ip6_ifstats, "ip6", 1, IPPROTO_RAW }, 255 { N_RIPCBINFO, N_ICMP6STAT, 1, protopr, 256 icmp6_stats, icmp6_ifstats, "icmp6", 1, IPPROTO_ICMPV6 }, 257#ifdef SDP 258 { -1, -1, 1, protopr, 259 NULL, NULL, "sdp", 1, IPPROTO_TCP }, 260#endif 261#ifdef IPSEC 262 { -1, N_IPSEC6STAT, 1, NULL, 263 ipsec_stats, NULL, "ipsec6", 0, 0 }, 264#endif 265#ifdef notyet 266 { -1, N_PIM6STAT, 1, NULL, 267 pim6_stats, NULL, "pim6", 1, 0 }, 268#endif 269 { -1, N_RIP6STAT, 1, NULL, 270 rip6_stats, NULL, "rip6", 1, 0 }, 271 { -1, -1, 0, NULL, 272 NULL, NULL, NULL, 0, 0 } 273}; 274#endif /*INET6*/ 275 276#ifdef IPSEC 277struct protox pfkeyprotox[] = { 278 { -1, N_PFKEYSTAT, 1, NULL, 279 pfkey_stats, NULL, "pfkey", 0, 0 }, 280 { -1, -1, 0, NULL, 281 NULL, NULL, NULL, 0, 0 } 282}; 283#endif 284 285struct protox atalkprotox[] = { 286 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, 287 ddp_stats, NULL, "ddp", 0, 0 }, 288 { -1, -1, 0, NULL, 289 NULL, NULL, NULL, 0, 0 } 290}; 291#ifdef NETGRAPH 292struct protox netgraphprotox[] = { 293 { N_NGSOCKS, -1, 1, netgraphprotopr, 294 NULL, NULL, "ctrl", 0, 0 }, 295 { N_NGSOCKS, -1, 1, netgraphprotopr, 296 NULL, NULL, "data", 0, 0 }, 297 { -1, -1, 0, NULL, 298 NULL, NULL, NULL, 0, 0 } 299}; 300#endif 301#ifdef IPX 302struct protox ipxprotox[] = { 303 { N_IPX, N_IPXSTAT, 1, ipxprotopr, 304 ipx_stats, NULL, "ipx", 0, 0 }, 305 { N_IPX, N_SPXSTAT, 1, ipxprotopr, 306 spx_stats, NULL, "spx", 0, 0 }, 307 { -1, -1, 0, NULL, 308 NULL, NULL, 0, 0, 0 } 309}; 310#endif 311 312struct protox *protoprotox[] = { 313 protox, 314#ifdef INET6 315 ip6protox, 316#endif 317#ifdef IPSEC 318 pfkeyprotox, 319#endif 320#ifdef IPX 321 ipxprotox, 322#endif 323 atalkprotox, NULL }; 324 325static void printproto(struct protox *, const char *); 326static void usage(void); 327static struct protox *name2protox(const char *); 328static struct protox *knownname(const char *); 329 330static kvm_t *kvmd; 331static char *nlistf = NULL, *memf = NULL; 332 333int Aflag; /* show addresses of protocol control block */ 334int aflag; /* show all sockets (including servers) */ 335int Bflag; /* show information about bpf consumers */ 336int bflag; /* show i/f total bytes in/out */ 337int dflag; /* show i/f dropped packets */ 338int gflag; /* show group (multicast) routing or stats */ 339int hflag; /* show counters in human readable format */ 340int iflag; /* show interfaces */ 341int Lflag; /* show size of listen queues */ 342int mflag; /* show memory stats */ 343int noutputs = 0; /* how much outputs before we exit */ 344int numeric_addr; /* show addresses numerically */ 345int numeric_port; /* show ports numerically */ 346static int pflag; /* show given protocol */ 347int Qflag; /* show netisr information */ 348int rflag; /* show routing tables (or routing stats) */ 349int sflag; /* show protocol statistics */ 350int Wflag; /* wide display */ 351int Tflag; /* TCP Information */ 352int xflag; /* extra information, includes all socket buffer info */ 353int zflag; /* zero stats */ 354 355int interval; /* repeat interval for i/f stats */ 356 357char *interface; /* desired i/f for stats, or NULL for all i/fs */ 358int unit; /* unit number for above */ 359 360int af; /* address family */ 361int live; /* true if we are examining a live system */ 362 363int 364main(int argc, char *argv[]) 365{ 366 struct protox *tp = NULL; /* for printing cblocks & stats */ 367 int ch; 368 int fib = -1; 369 char *endptr; 370 371 af = AF_UNSPEC; 372 373 while ((ch = getopt(argc, argv, "AaBbdF:f:ghI:iLlM:mN:np:Qq:rSTsuWw:xz")) 374 != -1) 375 switch(ch) { 376 case 'A': 377 Aflag = 1; 378 break; 379 case 'a': 380 aflag = 1; 381 break; 382 case 'B': 383 Bflag = 1; 384 break; 385 case 'b': 386 bflag = 1; 387 break; 388 case 'd': 389 dflag = 1; 390 break; 391 case 'F': 392 fib = strtol(optarg, &endptr, 0); 393 if (*endptr != '\0' || 394 (fib == 0 && (errno == EINVAL || errno == ERANGE))) 395 errx(1, "%s: invalid fib", optarg); 396 break; 397 case 'f': 398 if (strcmp(optarg, "ipx") == 0) 399 af = AF_IPX; 400 else if (strcmp(optarg, "inet") == 0) 401 af = AF_INET; 402#ifdef INET6 403 else if (strcmp(optarg, "inet6") == 0) 404 af = AF_INET6; 405#endif 406#ifdef IPSEC 407 else if (strcmp(optarg, "pfkey") == 0) 408 af = PF_KEY; 409#endif 410 else if (strcmp(optarg, "unix") == 0) 411 af = AF_UNIX; 412 else if (strcmp(optarg, "atalk") == 0) 413 af = AF_APPLETALK; 414#ifdef NETGRAPH 415 else if (strcmp(optarg, "ng") == 0 416 || strcmp(optarg, "netgraph") == 0) 417 af = AF_NETGRAPH; 418#endif 419 else if (strcmp(optarg, "link") == 0) 420 af = AF_LINK; 421 else { 422 errx(1, "%s: unknown address family", optarg); 423 } 424 break; 425 case 'g': 426 gflag = 1; 427 break; 428 case 'h': 429 hflag = 1; 430 break; 431 case 'I': { 432 char *cp; 433 434 iflag = 1; 435 for (cp = interface = optarg; isalpha(*cp); cp++) 436 continue; 437 unit = atoi(cp); 438 break; 439 } 440 case 'i': 441 iflag = 1; 442 break; 443 case 'L': 444 Lflag = 1; 445 break; 446 case 'M': 447 memf = optarg; 448 break; 449 case 'm': 450 mflag = 1; 451 break; 452 case 'N': 453 nlistf = optarg; 454 break; 455 case 'n': 456 numeric_addr = numeric_port = 1; 457 break; 458 case 'p': 459 if ((tp = name2protox(optarg)) == NULL) { 460 errx(1, 461 "%s: unknown or uninstrumented protocol", 462 optarg); 463 } 464 pflag = 1; 465 break; 466 case 'Q': 467 Qflag = 1; 468 break; 469 case 'q': 470 noutputs = atoi(optarg); 471 if (noutputs != 0) 472 noutputs++; 473 break; 474 case 'r': 475 rflag = 1; 476 break; 477 case 's': 478 ++sflag; 479 break; 480 case 'S': 481 numeric_addr = 1; 482 break; 483 case 'u': 484 af = AF_UNIX; 485 break; 486 case 'W': 487 case 'l': 488 Wflag = 1; 489 break; 490 case 'w': 491 interval = atoi(optarg); 492 iflag = 1; 493 break; 494 case 'T': 495 Tflag = 1; 496 break; 497 case 'x': 498 xflag = 1; 499 break; 500 case 'z': 501 zflag = 1; 502 break; 503 case '?': 504 default: 505 usage(); 506 } 507 argv += optind; 508 argc -= optind; 509 510#define BACKWARD_COMPATIBILITY 511#ifdef BACKWARD_COMPATIBILITY 512 if (*argv) { 513 if (isdigit(**argv)) { 514 interval = atoi(*argv); 515 if (interval <= 0) 516 usage(); 517 ++argv; 518 iflag = 1; 519 } 520 if (*argv) { 521 nlistf = *argv; 522 if (*++argv) 523 memf = *argv; 524 } 525 } 526#endif 527 528 /* 529 * Discard setgid privileges if not the running kernel so that bad 530 * guys can't print interesting stuff from kernel memory. 531 */ 532 live = (nlistf == NULL && memf == NULL); 533 if (!live) 534 setgid(getgid()); 535 536 if (xflag && Tflag) 537 errx(1, "-x and -T are incompatible, pick one."); 538 539 if (Bflag) { 540 if (!live) 541 usage(); 542 bpf_stats(interface); 543 exit(0); 544 } 545 if (mflag) { 546 if (!live) { 547 if (kread(0, NULL, 0) == 0) 548 mbpr(kvmd, nl[N_SFSTAT].n_value); 549 } else 550 mbpr(NULL, 0); 551 exit(0); 552 } 553 if (Qflag) { 554 if (!live) { 555 if (kread(0, NULL, 0) == 0) 556 netisr_stats(kvmd); 557 } else 558 netisr_stats(NULL); 559 exit(0); 560 } 561#if 0 562 /* 563 * Keep file descriptors open to avoid overhead 564 * of open/close on each call to get* routines. 565 */ 566 sethostent(1); 567 setnetent(1); 568#else 569 /* 570 * This does not make sense any more with DNS being default over 571 * the files. Doing a setXXXXent(1) causes a tcp connection to be 572 * used for the queries, which is slower. 573 */ 574#endif 575 kread(0, NULL, 0); 576 if (iflag && !sflag) { 577 intpr(interval, nl[N_IFNET].n_value, NULL); 578 exit(0); 579 } 580 if (rflag) { 581 if (sflag) 582 rt_stats(nl[N_RTSTAT].n_value, nl[N_RTTRASH].n_value); 583 else 584 routepr(nl[N_RTREE].n_value, fib); 585 exit(0); 586 } 587 if (gflag) { 588 if (sflag) { 589 if (af == AF_INET || af == AF_UNSPEC) 590 mrt_stats(nl[N_MRTSTAT].n_value); 591#ifdef INET6 592 if (af == AF_INET6 || af == AF_UNSPEC) 593 mrt6_stats(nl[N_MRT6STAT].n_value); 594#endif 595 } else { 596 if (af == AF_INET || af == AF_UNSPEC) 597 mroutepr(nl[N_MFCHASHTBL].n_value, 598 nl[N_MFCTABLESIZE].n_value, 599 nl[N_VIFTABLE].n_value); 600#ifdef INET6 601 if (af == AF_INET6 || af == AF_UNSPEC) 602 mroute6pr(nl[N_MF6CTABLE].n_value, 603 nl[N_MIF6TABLE].n_value); 604#endif 605 } 606 exit(0); 607 } 608 609 if (tp) { 610 printproto(tp, tp->pr_name); 611 exit(0); 612 } 613 if (af == AF_INET || af == AF_UNSPEC) 614 for (tp = protox; tp->pr_name; tp++) 615 printproto(tp, tp->pr_name); 616#ifdef INET6 617 if (af == AF_INET6 || af == AF_UNSPEC) 618 for (tp = ip6protox; tp->pr_name; tp++) 619 printproto(tp, tp->pr_name); 620#endif /*INET6*/ 621#ifdef IPSEC 622 if (af == PF_KEY || af == AF_UNSPEC) 623 for (tp = pfkeyprotox; tp->pr_name; tp++) 624 printproto(tp, tp->pr_name); 625#endif /*IPSEC*/ 626#ifdef IPX 627 if (af == AF_IPX || af == AF_UNSPEC) { 628 for (tp = ipxprotox; tp->pr_name; tp++) 629 printproto(tp, tp->pr_name); 630 } 631#endif /* IPX */ 632 if (af == AF_APPLETALK || af == AF_UNSPEC) 633 for (tp = atalkprotox; tp->pr_name; tp++) 634 printproto(tp, tp->pr_name); 635#ifdef NETGRAPH 636 if (af == AF_NETGRAPH || af == AF_UNSPEC) 637 for (tp = netgraphprotox; tp->pr_name; tp++) 638 printproto(tp, tp->pr_name); 639#endif /* NETGRAPH */ 640 if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag) 641 unixpr(nl[N_UNP_COUNT].n_value, nl[N_UNP_GENCNT].n_value, 642 nl[N_UNP_DHEAD].n_value, nl[N_UNP_SHEAD].n_value, 643 nl[N_UNP_SPHEAD].n_value); 644 exit(0); 645} 646 647/* 648 * Print out protocol statistics or control blocks (per sflag). 649 * If the interface was not specifically requested, and the symbol 650 * is not in the namelist, ignore this one. 651 */ 652static void 653printproto(struct protox *tp, const char *name) 654{ 655 void (*pr)(u_long, const char *, int, int); 656 u_long off; 657 658 if (sflag) { 659 if (iflag) { 660 if (tp->pr_istats) 661 intpr(interval, nl[N_IFNET].n_value, 662 tp->pr_istats); 663 else if (pflag) 664 printf("%s: no per-interface stats routine\n", 665 tp->pr_name); 666 return; 667 } else { 668 pr = tp->pr_stats; 669 if (!pr) { 670 if (pflag) 671 printf("%s: no stats routine\n", 672 tp->pr_name); 673 return; 674 } 675 if (tp->pr_usesysctl && live) 676 off = 0; 677 else if (tp->pr_sindex < 0) { 678 if (pflag) 679 printf( 680 "%s: stats routine doesn't work on cores\n", 681 tp->pr_name); 682 return; 683 } else 684 off = nl[tp->pr_sindex].n_value; 685 } 686 } else { 687 pr = tp->pr_cblocks; 688 if (!pr) { 689 if (pflag) 690 printf("%s: no PCB routine\n", tp->pr_name); 691 return; 692 } 693 if (tp->pr_usesysctl && live) 694 off = 0; 695 else if (tp->pr_index < 0) { 696 if (pflag) 697 printf( 698 "%s: PCB routine doesn't work on cores\n", 699 tp->pr_name); 700 return; 701 } else 702 off = nl[tp->pr_index].n_value; 703 } 704 if (pr != NULL && (off || (live && tp->pr_usesysctl) || 705 af != AF_UNSPEC)) 706 (*pr)(off, name, af, tp->pr_protocol); 707} 708 709static int 710kvmd_init(void) 711{ 712 char errbuf[_POSIX2_LINE_MAX]; 713 714 if (kvmd != NULL) 715 return (0); 716 717 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 718 setgid(getgid()); 719 720 if (kvmd == NULL) { 721 warnx("kvm not available: %s", errbuf); 722 return (-1); 723 } 724 725 if (kvm_nlist(kvmd, nl) < 0) { 726 if (nlistf) 727 errx(1, "%s: kvm_nlist: %s", nlistf, 728 kvm_geterr(kvmd)); 729 else 730 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd)); 731 } 732 733 if (nl[0].n_type == 0) { 734 if (nlistf) 735 errx(1, "%s: no namelist", nlistf); 736 else 737 errx(1, "no namelist"); 738 } 739 740 return (0); 741} 742 743/* 744 * Read kernel memory, return 0 on success. 745 */ 746int 747kread(u_long addr, void *buf, size_t size) 748{ 749 750 if (kvmd_init() < 0) 751 return (-1); 752 753 if (!buf) 754 return (0); 755 if (kvm_read(kvmd, addr, buf, size) != (ssize_t)size) { 756 warnx("%s", kvm_geterr(kvmd)); 757 return (-1); 758 } 759 return (0); 760} 761 762/* 763 * Read an array of N counters in kernel memory into array of N uint64_t's. 764 */ 765int 766kread_counters(u_long addr, void *buf, size_t size) 767{ 768 uint64_t *c = buf; 769 770 if (kvmd_init() < 0) 771 return (-1); 772 773 if (kread(addr, buf, size) < 0) 774 return (-1); 775 776 while (size != 0) { 777 *c = kvm_counter_u64_fetch(kvmd, *c); 778 size -= sizeof(*c); 779 c++; 780 } 781 return (0); 782} 783 784const char * 785plural(uintmax_t n) 786{ 787 return (n != 1 ? "s" : ""); 788} 789 790const char * 791plurales(uintmax_t n) 792{ 793 return (n != 1 ? "es" : ""); 794} 795 796const char * 797pluralies(uintmax_t n) 798{ 799 return (n != 1 ? "ies" : "y"); 800} 801 802/* 803 * Find the protox for the given "well-known" name. 804 */ 805static struct protox * 806knownname(const char *name) 807{ 808 struct protox **tpp, *tp; 809 810 for (tpp = protoprotox; *tpp; tpp++) 811 for (tp = *tpp; tp->pr_name; tp++) 812 if (strcmp(tp->pr_name, name) == 0) 813 return (tp); 814 return (NULL); 815} 816 817/* 818 * Find the protox corresponding to name. 819 */ 820static struct protox * 821name2protox(const char *name) 822{ 823 struct protox *tp; 824 char **alias; /* alias from p->aliases */ 825 struct protoent *p; 826 827 /* 828 * Try to find the name in the list of "well-known" names. If that 829 * fails, check if name is an alias for an Internet protocol. 830 */ 831 if ((tp = knownname(name)) != NULL) 832 return (tp); 833 834 setprotoent(1); /* make protocol lookup cheaper */ 835 while ((p = getprotoent()) != NULL) { 836 /* assert: name not same as p->name */ 837 for (alias = p->p_aliases; *alias; alias++) 838 if (strcmp(name, *alias) == 0) { 839 endprotoent(); 840 return (knownname(p->p_name)); 841 } 842 } 843 endprotoent(); 844 return (NULL); 845} 846 847static void 848usage(void) 849{ 850 (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", 851"usage: netstat [-AaLnSTWx] [-f protocol_family | -p protocol]\n" 852" [-M core] [-N system]", 853" netstat -i | -I interface [-abdhnW] [-f address_family]\n" 854" [-M core] [-N system]", 855" netstat -w wait [-I interface] [-d] [-M core] [-N system] [-q howmany]", 856" netstat -s [-s] [-z] [-f protocol_family | -p protocol]\n" 857" [-M core] [-N system]", 858" netstat -i | -I interface -s [-f protocol_family | -p protocol]\n" 859" [-M core] [-N system]", 860" netstat -m [-M core] [-N system]", 861" netstat -B [-I interface]", 862" netstat -r [-AanW] [-f address_family] [-M core] [-N system]", 863" netstat -rs [-s] [-M core] [-N system]", 864" netstat -g [-W] [-f address_family] [-M core] [-N system]", 865" netstat -gs [-s] [-f address_family] [-M core] [-N system]", 866" netstat -Q"); 867 exit(1); 868} 869