main.c revision 281161
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: stable/10/usr.bin/netstat/main.c 281161 2015-04-06 18:40:50Z hiren $"); 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" }, /* XXXGL: can be deleted */ 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_RTTRASH 21 116 { .n_name = "_rttrash" }, 117#define N_CARPSTAT 22 118 { .n_name = "_carpstats" }, 119#define N_PFSYNCSTAT 23 120 { .n_name = "_pfsyncstats" }, 121#define N_AHSTAT 24 122 { .n_name = "_ahstat" }, 123#define N_ESPSTAT 25 124 { .n_name = "_espstat" }, 125#define N_IPCOMPSTAT 26 126 { .n_name = "_ipcompstat" }, 127#define N_TCPSTAT 27 128 { .n_name = "_tcpstat" }, 129#define N_UDPSTAT 28 130 { .n_name = "_udpstat" }, 131#define N_IPSTAT 29 132 { .n_name = "_ipstat" }, 133#define N_ICMPSTAT 30 134 { .n_name = "_icmpstat" }, 135#define N_IGMPSTAT 31 136 { .n_name = "_igmpstat" }, 137#define N_PIMSTAT 32 138 { .n_name = "_pimstat" }, 139#define N_TCBINFO 33 140 { .n_name = "_tcbinfo" }, 141#define N_UDBINFO 34 142 { .n_name = "_udbinfo" }, 143#define N_DIVCBINFO 35 144 { .n_name = "_divcbinfo" }, 145#define N_RIPCBINFO 36 146 { .n_name = "_ripcbinfo" }, 147#define N_UNP_COUNT 37 148 { .n_name = "_unp_count" }, 149#define N_UNP_GENCNT 38 150 { .n_name = "_unp_gencnt" }, 151#define N_UNP_DHEAD 39 152 { .n_name = "_unp_dhead" }, 153#define N_UNP_SHEAD 40 154 { .n_name = "_unp_shead" }, 155#define N_RIP6STAT 41 156 { .n_name = "_rip6stat" }, 157#define N_SCTPSTAT 42 158 { .n_name = "_sctpstat" }, 159#define N_MFCTABLESIZE 43 160 { .n_name = "_mfctablesize" }, 161#define N_ARPSTAT 44 162 { .n_name = "_arpstat" }, 163#define N_UNP_SPHEAD 45 164 { .n_name = "unp_sphead" }, 165#define N_SFSTAT 46 166 { .n_name = "_sfstat"}, 167 { .n_name = NULL }, 168}; 169 170struct protox { 171 int pr_index; /* index into nlist of cb head */ 172 int pr_sindex; /* index into nlist of stat block */ 173 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 174 void (*pr_cblocks)(u_long, const char *, int, int); 175 /* control blocks printing routine */ 176 void (*pr_stats)(u_long, const char *, int, int); 177 /* statistics printing routine */ 178 void (*pr_istats)(char *); /* per/if statistics printing routine */ 179 const char *pr_name; /* well-known name */ 180 int pr_usesysctl; /* non-zero if we use sysctl, not kvm */ 181 int pr_protocol; 182} protox[] = { 183 { N_TCBINFO, N_TCPSTAT, 1, protopr, 184 tcp_stats, NULL, "tcp", 1, IPPROTO_TCP }, 185 { N_UDBINFO, N_UDPSTAT, 1, protopr, 186 udp_stats, NULL, "udp", 1, IPPROTO_UDP }, 187#ifdef SCTP 188 { -1, N_SCTPSTAT, 1, sctp_protopr, 189 sctp_stats, NULL, "sctp", 1, IPPROTO_SCTP }, 190#endif 191#ifdef SDP 192 { -1, -1, 1, protopr, 193 NULL, NULL, "sdp", 1, IPPROTO_TCP }, 194#endif 195 { N_DIVCBINFO, -1, 1, protopr, 196 NULL, NULL, "divert", 1, IPPROTO_DIVERT }, 197 { N_RIPCBINFO, N_IPSTAT, 1, protopr, 198 ip_stats, NULL, "ip", 1, IPPROTO_RAW }, 199 { N_RIPCBINFO, N_ICMPSTAT, 1, protopr, 200 icmp_stats, NULL, "icmp", 1, IPPROTO_ICMP }, 201 { N_RIPCBINFO, N_IGMPSTAT, 1, protopr, 202 igmp_stats, NULL, "igmp", 1, IPPROTO_IGMP }, 203#ifdef IPSEC 204 { -1, N_IPSECSTAT, 1, NULL, /* keep as compat */ 205 ipsec_stats, NULL, "ipsec", 0, 0}, 206 { -1, N_AHSTAT, 1, NULL, 207 ah_stats, NULL, "ah", 0, 0}, 208 { -1, N_ESPSTAT, 1, NULL, 209 esp_stats, NULL, "esp", 0, 0}, 210 { -1, N_IPCOMPSTAT, 1, NULL, 211 ipcomp_stats, NULL, "ipcomp", 0, 0}, 212#endif 213 { N_RIPCBINFO, N_PIMSTAT, 1, protopr, 214 pim_stats, NULL, "pim", 1, IPPROTO_PIM }, 215 { -1, N_CARPSTAT, 1, NULL, 216 carp_stats, NULL, "carp", 1, 0 }, 217#ifdef PF 218 { -1, N_PFSYNCSTAT, 1, NULL, 219 pfsync_stats, NULL, "pfsync", 1, 0 }, 220#endif 221 { -1, N_ARPSTAT, 1, NULL, 222 arp_stats, NULL, "arp", 1, 0 }, 223 { -1, -1, 0, NULL, 224 NULL, NULL, NULL, 0, 0 } 225}; 226 227#ifdef INET6 228struct protox ip6protox[] = { 229 { N_TCBINFO, N_TCPSTAT, 1, protopr, 230 tcp_stats, NULL, "tcp", 1, IPPROTO_TCP }, 231 { N_UDBINFO, N_UDPSTAT, 1, protopr, 232 udp_stats, NULL, "udp", 1, IPPROTO_UDP }, 233 { N_RIPCBINFO, N_IP6STAT, 1, protopr, 234 ip6_stats, ip6_ifstats, "ip6", 1, IPPROTO_RAW }, 235 { N_RIPCBINFO, N_ICMP6STAT, 1, protopr, 236 icmp6_stats, icmp6_ifstats, "icmp6", 1, IPPROTO_ICMPV6 }, 237#ifdef SDP 238 { -1, -1, 1, protopr, 239 NULL, NULL, "sdp", 1, IPPROTO_TCP }, 240#endif 241#ifdef IPSEC 242 { -1, N_IPSEC6STAT, 1, NULL, 243 ipsec_stats, NULL, "ipsec6", 0, 0 }, 244#endif 245#ifdef notyet 246 { -1, N_PIM6STAT, 1, NULL, 247 pim6_stats, NULL, "pim6", 1, 0 }, 248#endif 249 { -1, N_RIP6STAT, 1, NULL, 250 rip6_stats, NULL, "rip6", 1, 0 }, 251 { -1, -1, 0, NULL, 252 NULL, NULL, NULL, 0, 0 } 253}; 254#endif /*INET6*/ 255 256#ifdef IPSEC 257struct protox pfkeyprotox[] = { 258 { -1, N_PFKEYSTAT, 1, NULL, 259 pfkey_stats, NULL, "pfkey", 0, 0 }, 260 { -1, -1, 0, NULL, 261 NULL, NULL, NULL, 0, 0 } 262}; 263#endif 264 265struct protox atalkprotox[] = { 266 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, 267 ddp_stats, NULL, "ddp", 0, 0 }, 268 { -1, -1, 0, NULL, 269 NULL, NULL, NULL, 0, 0 } 270}; 271#ifdef NETGRAPH 272struct protox netgraphprotox[] = { 273 { N_NGSOCKS, -1, 1, netgraphprotopr, 274 NULL, NULL, "ctrl", 0, 0 }, 275 { N_NGSOCKS, -1, 1, netgraphprotopr, 276 NULL, NULL, "data", 0, 0 }, 277 { -1, -1, 0, NULL, 278 NULL, NULL, NULL, 0, 0 } 279}; 280#endif 281#ifdef IPX 282struct protox ipxprotox[] = { 283 { N_IPX, N_IPXSTAT, 1, ipxprotopr, 284 ipx_stats, NULL, "ipx", 0, 0 }, 285 { N_IPX, N_SPXSTAT, 1, ipxprotopr, 286 spx_stats, NULL, "spx", 0, 0 }, 287 { -1, -1, 0, NULL, 288 NULL, NULL, 0, 0, 0 } 289}; 290#endif 291 292struct protox *protoprotox[] = { 293 protox, 294#ifdef INET6 295 ip6protox, 296#endif 297#ifdef IPSEC 298 pfkeyprotox, 299#endif 300#ifdef IPX 301 ipxprotox, 302#endif 303 atalkprotox, NULL }; 304 305static void printproto(struct protox *, const char *); 306static void usage(void); 307static struct protox *name2protox(const char *); 308static struct protox *knownname(const char *); 309 310static kvm_t *kvmd; 311static char *nlistf = NULL, *memf = NULL; 312 313int Aflag; /* show addresses of protocol control block */ 314int aflag; /* show all sockets (including servers) */ 315int Bflag; /* show information about bpf consumers */ 316int bflag; /* show i/f total bytes in/out */ 317int dflag; /* show i/f dropped packets */ 318int gflag; /* show group (multicast) routing or stats */ 319int hflag; /* show counters in human readable format */ 320int iflag; /* show interfaces */ 321int Lflag; /* show size of listen queues */ 322int mflag; /* show memory stats */ 323int noutputs = 0; /* how much outputs before we exit */ 324int numeric_addr; /* show addresses numerically */ 325int numeric_port; /* show ports numerically */ 326static int pflag; /* show given protocol */ 327int Qflag; /* show netisr information */ 328int rflag; /* show routing tables (or routing stats) */ 329int Rflag; /* show flow / RSS statistics */ 330int sflag; /* show protocol statistics */ 331int Wflag; /* wide display */ 332int Tflag; /* TCP Information */ 333int xflag; /* extra information, includes all socket buffer info */ 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 int fib = -1; 350 char *endptr; 351 352 af = AF_UNSPEC; 353 354 while ((ch = getopt(argc, argv, "46AaBbdF:f:ghI:iLlM:mN:np:Qq:RrSTsuWw:xz")) 355 != -1) 356 switch(ch) { 357 case '4': 358#ifdef INET 359 af = AF_INET; 360#else 361 errx(1, "IPv4 support is not compiled in"); 362#endif 363 break; 364 case '6': 365#ifdef INET6 366 af = AF_INET6; 367#else 368 errx(1, "IPv6 support is not compiled in"); 369#endif 370 break; 371 case 'A': 372 Aflag = 1; 373 break; 374 case 'a': 375 aflag = 1; 376 break; 377 case 'B': 378 Bflag = 1; 379 break; 380 case 'b': 381 bflag = 1; 382 break; 383 case 'd': 384 dflag = 1; 385 break; 386 case 'F': 387 fib = strtol(optarg, &endptr, 0); 388 if (*endptr != '\0' || 389 (fib == 0 && (errno == EINVAL || errno == ERANGE))) 390 errx(1, "%s: invalid fib", optarg); 391 break; 392 case 'f': 393 if (strcmp(optarg, "ipx") == 0) 394 af = AF_IPX; 395 else if (strcmp(optarg, "inet") == 0) 396 af = AF_INET; 397#ifdef INET6 398 else if (strcmp(optarg, "inet6") == 0) 399 af = AF_INET6; 400#endif 401#ifdef IPSEC 402 else if (strcmp(optarg, "pfkey") == 0) 403 af = PF_KEY; 404#endif 405 else if (strcmp(optarg, "unix") == 0) 406 af = AF_UNIX; 407 else if (strcmp(optarg, "atalk") == 0) 408 af = AF_APPLETALK; 409#ifdef NETGRAPH 410 else if (strcmp(optarg, "ng") == 0 411 || strcmp(optarg, "netgraph") == 0) 412 af = AF_NETGRAPH; 413#endif 414 else if (strcmp(optarg, "link") == 0) 415 af = AF_LINK; 416 else { 417 errx(1, "%s: unknown address family", optarg); 418 } 419 break; 420 case 'g': 421 gflag = 1; 422 break; 423 case 'h': 424 hflag = 1; 425 break; 426 case 'I': { 427 char *cp; 428 429 iflag = 1; 430 for (cp = interface = optarg; isalpha(*cp); cp++) 431 continue; 432 unit = atoi(cp); 433 break; 434 } 435 case 'i': 436 iflag = 1; 437 break; 438 case 'L': 439 Lflag = 1; 440 break; 441 case 'M': 442 memf = optarg; 443 break; 444 case 'm': 445 mflag = 1; 446 break; 447 case 'N': 448 nlistf = optarg; 449 break; 450 case 'n': 451 numeric_addr = numeric_port = 1; 452 break; 453 case 'p': 454 if ((tp = name2protox(optarg)) == NULL) { 455 errx(1, 456 "%s: unknown or uninstrumented protocol", 457 optarg); 458 } 459 pflag = 1; 460 break; 461 case 'Q': 462 Qflag = 1; 463 break; 464 case 'q': 465 noutputs = atoi(optarg); 466 if (noutputs != 0) 467 noutputs++; 468 break; 469 case 'r': 470 rflag = 1; 471 break; 472 case 'R': 473 Rflag = 1; 474 break; 475 case 's': 476 ++sflag; 477 break; 478 case 'S': 479 numeric_addr = 1; 480 break; 481 case 'u': 482 af = AF_UNIX; 483 break; 484 case 'W': 485 case 'l': 486 Wflag = 1; 487 break; 488 case 'w': 489 interval = atoi(optarg); 490 iflag = 1; 491 break; 492 case 'T': 493 Tflag = 1; 494 break; 495 case 'x': 496 xflag = 1; 497 break; 498 case 'z': 499 zflag = 1; 500 break; 501 case '?': 502 default: 503 usage(); 504 } 505 argv += optind; 506 argc -= optind; 507 508#define BACKWARD_COMPATIBILITY 509#ifdef BACKWARD_COMPATIBILITY 510 if (*argv) { 511 if (isdigit(**argv)) { 512 interval = atoi(*argv); 513 if (interval <= 0) 514 usage(); 515 ++argv; 516 iflag = 1; 517 } 518 if (*argv) { 519 nlistf = *argv; 520 if (*++argv) 521 memf = *argv; 522 } 523 } 524#endif 525 526 /* 527 * Discard setgid privileges if not the running kernel so that bad 528 * guys can't print interesting stuff from kernel memory. 529 */ 530 live = (nlistf == NULL && memf == NULL); 531 if (!live) 532 setgid(getgid()); 533 534 if (xflag && Tflag) 535 errx(1, "-x and -T are incompatible, pick one."); 536 537 if (Bflag) { 538 if (!live) 539 usage(); 540 bpf_stats(interface); 541 exit(0); 542 } 543 if (mflag) { 544 if (!live) { 545 if (kread(0, NULL, 0) == 0) 546 mbpr(kvmd, nl[N_SFSTAT].n_value); 547 } else 548 mbpr(NULL, 0); 549 exit(0); 550 } 551 if (Qflag) { 552 if (!live) { 553 if (kread(0, NULL, 0) == 0) 554 netisr_stats(kvmd); 555 } else 556 netisr_stats(NULL); 557 exit(0); 558 } 559#if 0 560 /* 561 * Keep file descriptors open to avoid overhead 562 * of open/close on each call to get* routines. 563 */ 564 sethostent(1); 565 setnetent(1); 566#else 567 /* 568 * This does not make sense any more with DNS being default over 569 * the files. Doing a setXXXXent(1) causes a tcp connection to be 570 * used for the queries, which is slower. 571 */ 572#endif 573 if (iflag && !sflag) { 574 intpr(interval, NULL, af); 575 exit(0); 576 } 577 if (rflag) { 578 if (sflag) { 579 rt_stats(); 580 flowtable_stats(); 581 } else 582 routepr(fib, af); 583 exit(0); 584 } 585 586 if (gflag) { 587 if (sflag) { 588 if (af == AF_INET || af == AF_UNSPEC) 589 mrt_stats(); 590#ifdef INET6 591 if (af == AF_INET6 || af == AF_UNSPEC) 592 mrt6_stats(); 593#endif 594 } else { 595 if (af == AF_INET || af == AF_UNSPEC) 596 mroutepr(); 597#ifdef INET6 598 if (af == AF_INET6 || af == AF_UNSPEC) 599 mroute6pr(); 600#endif 601 } 602 exit(0); 603 } 604 605 /* Load all necessary kvm symbols */ 606 kresolve_list(nl); 607 608 if (tp) { 609 printproto(tp, tp->pr_name); 610 exit(0); 611 } 612 if (af == AF_INET || af == AF_UNSPEC) 613 for (tp = protox; tp->pr_name; tp++) 614 printproto(tp, tp->pr_name); 615#ifdef INET6 616 if (af == AF_INET6 || af == AF_UNSPEC) 617 for (tp = ip6protox; tp->pr_name; tp++) 618 printproto(tp, tp->pr_name); 619#endif /*INET6*/ 620#ifdef IPSEC 621 if (af == PF_KEY || af == AF_UNSPEC) 622 for (tp = pfkeyprotox; tp->pr_name; tp++) 623 printproto(tp, tp->pr_name); 624#endif /*IPSEC*/ 625#ifdef IPX 626 if (af == AF_IPX || af == AF_UNSPEC) { 627 for (tp = ipxprotox; tp->pr_name; tp++) 628 printproto(tp, tp->pr_name); 629 } 630#endif /* IPX */ 631 if (af == AF_APPLETALK || af == AF_UNSPEC) 632 for (tp = atalkprotox; tp->pr_name; tp++) 633 printproto(tp, tp->pr_name); 634#ifdef NETGRAPH 635 if (af == AF_NETGRAPH || af == AF_UNSPEC) 636 for (tp = netgraphprotox; tp->pr_name; tp++) 637 printproto(tp, tp->pr_name); 638#endif /* NETGRAPH */ 639 if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag) 640 unixpr(nl[N_UNP_COUNT].n_value, nl[N_UNP_GENCNT].n_value, 641 nl[N_UNP_DHEAD].n_value, nl[N_UNP_SHEAD].n_value, 642 nl[N_UNP_SPHEAD].n_value); 643 exit(0); 644} 645 646/* 647 * Print out protocol statistics or control blocks (per sflag). 648 * If the interface was not specifically requested, and the symbol 649 * is not in the namelist, ignore this one. 650 */ 651static void 652printproto(struct protox *tp, const char *name) 653{ 654 void (*pr)(u_long, const char *, int, int); 655 u_long off; 656 657 if (sflag) { 658 if (iflag) { 659 if (tp->pr_istats) 660 intpr(interval, tp->pr_istats, af); 661 else if (pflag) 662 printf("%s: no per-interface stats routine\n", 663 tp->pr_name); 664 return; 665 } else { 666 pr = tp->pr_stats; 667 if (!pr) { 668 if (pflag) 669 printf("%s: no stats routine\n", 670 tp->pr_name); 671 return; 672 } 673 if (tp->pr_usesysctl && live) 674 off = 0; 675 else if (tp->pr_sindex < 0) { 676 if (pflag) 677 printf( 678 "%s: stats routine doesn't work on cores\n", 679 tp->pr_name); 680 return; 681 } else 682 off = nl[tp->pr_sindex].n_value; 683 } 684 } else { 685 pr = tp->pr_cblocks; 686 if (!pr) { 687 if (pflag) 688 printf("%s: no PCB routine\n", tp->pr_name); 689 return; 690 } 691 if (tp->pr_usesysctl && live) 692 off = 0; 693 else if (tp->pr_index < 0) { 694 if (pflag) 695 printf( 696 "%s: PCB routine doesn't work on cores\n", 697 tp->pr_name); 698 return; 699 } else 700 off = nl[tp->pr_index].n_value; 701 } 702 if (pr != NULL && (off || (live && tp->pr_usesysctl) || 703 af != AF_UNSPEC)) 704 (*pr)(off, name, af, tp->pr_protocol); 705} 706 707static int 708kvmd_init(void) 709{ 710 char errbuf[_POSIX2_LINE_MAX]; 711 712 if (kvmd != NULL) 713 return (0); 714 715 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 716 setgid(getgid()); 717 718 if (kvmd == NULL) { 719 warnx("kvm not available: %s", errbuf); 720 return (-1); 721 } 722 723 return (0); 724} 725 726/* 727 * Resolve symbol list, return 0 on success. 728 */ 729int 730kresolve_list(struct nlist *_nl) 731{ 732 733 if ((kvmd == NULL) && (kvmd_init() != 0)) 734 return (-1); 735 736 if (_nl[0].n_type != 0) 737 return (0); 738 739 if (kvm_nlist(kvmd, _nl) < 0) { 740 if (nlistf) 741 errx(1, "%s: kvm_nlist: %s", nlistf, 742 kvm_geterr(kvmd)); 743 else 744 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd)); 745 } 746 747 return (0); 748} 749 750/* 751 * Read kernel memory, return 0 on success. 752 */ 753int 754kread(u_long addr, void *buf, size_t size) 755{ 756 757 if (kvmd_init() < 0) 758 return (-1); 759 760 if (!buf) 761 return (0); 762 if (kvm_read(kvmd, addr, buf, size) != (ssize_t)size) { 763 warnx("%s", kvm_geterr(kvmd)); 764 return (-1); 765 } 766 return (0); 767} 768 769/* 770 * Read single counter(9). 771 */ 772uint64_t 773kread_counter(u_long addr) 774{ 775 776 if (kvmd_init() < 0) 777 return (-1); 778 779 return (kvm_counter_u64_fetch(kvmd, addr)); 780} 781 782/* 783 * Read an array of N counters in kernel memory into array of N uint64_t's. 784 */ 785int 786kread_counters(u_long addr, void *buf, size_t size) 787{ 788 uint64_t *c = buf; 789 790 if (kvmd_init() < 0) 791 return (-1); 792 793 if (kread(addr, buf, size) < 0) 794 return (-1); 795 796 while (size != 0) { 797 *c = kvm_counter_u64_fetch(kvmd, *c); 798 size -= sizeof(*c); 799 c++; 800 } 801 return (0); 802} 803 804const char * 805plural(uintmax_t n) 806{ 807 return (n != 1 ? "s" : ""); 808} 809 810const char * 811plurales(uintmax_t n) 812{ 813 return (n != 1 ? "es" : ""); 814} 815 816const char * 817pluralies(uintmax_t n) 818{ 819 return (n != 1 ? "ies" : "y"); 820} 821 822/* 823 * Find the protox for the given "well-known" name. 824 */ 825static struct protox * 826knownname(const char *name) 827{ 828 struct protox **tpp, *tp; 829 830 for (tpp = protoprotox; *tpp; tpp++) 831 for (tp = *tpp; tp->pr_name; tp++) 832 if (strcmp(tp->pr_name, name) == 0) 833 return (tp); 834 return (NULL); 835} 836 837/* 838 * Find the protox corresponding to name. 839 */ 840static struct protox * 841name2protox(const char *name) 842{ 843 struct protox *tp; 844 char **alias; /* alias from p->aliases */ 845 struct protoent *p; 846 847 /* 848 * Try to find the name in the list of "well-known" names. If that 849 * fails, check if name is an alias for an Internet protocol. 850 */ 851 if ((tp = knownname(name)) != NULL) 852 return (tp); 853 854 setprotoent(1); /* make protocol lookup cheaper */ 855 while ((p = getprotoent()) != NULL) { 856 /* assert: name not same as p->name */ 857 for (alias = p->p_aliases; *alias; alias++) 858 if (strcmp(name, *alias) == 0) { 859 endprotoent(); 860 return (knownname(p->p_name)); 861 } 862 } 863 endprotoent(); 864 return (NULL); 865} 866 867static void 868usage(void) 869{ 870 (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", 871"usage: netstat [-46AaLnRSTWx] [-f protocol_family | -p protocol]\n" 872" [-M core] [-N system]", 873" netstat -i | -I interface [-46abdhnW] [-f address_family]\n" 874" [-M core] [-N system]", 875" netstat -w wait [-I interface] [-46d] [-M core] [-N system] [-q howmany]", 876" netstat -s [-s] [-46z] [-f protocol_family | -p protocol]\n" 877" [-M core] [-N system]", 878" netstat -i | -I interface [-46s] [-f protocol_family | -p protocol]\n" 879" [-M core] [-N system]", 880" netstat -m [-M core] [-N system]", 881" netstat -B [-I interface]", 882" netstat -r [-46AanW] [-f address_family] [-M core] [-N system]", 883" netstat -rs [-s] [-M core] [-N system]", 884" netstat -g [-46W] [-f address_family] [-M core] [-N system]", 885" netstat -gs [-46s] [-f address_family] [-M core] [-N system]", 886" netstat -Q"); 887 exit(1); 888} 889