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 35 char 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 42 static char sccsid[] = "@(#)main.c 8.4 (Berkeley) 3/1/94"; 43 #endif /* not lint */ 44 #endif 45 46 #include <sys/cdefs.h> 47 __FBSDID("$FreeBSD$"); 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 #include <netgraph/ng_socket.h> 58 59 #include <ctype.h> 60 #include <err.h> 61 #include <errno.h> 62 #include <kvm.h> 63 #include <limits.h> 64 #include <netdb.h> 65 #include <nlist.h> 66 #include <paths.h> 67 #include <stdint.h> 68 #include <stdio.h> 69 #include <stdlib.h> 70 #include <string.h> 71 #include <unistd.h> 72 #include "netstat.h" 73 74 static struct nlist nl[] = { 75 #define N_IFNET 0 76 { .n_name = "_ifnet" }, 77 #define N_RTSTAT 1 78 { .n_name = "_rtstat" }, 79 #define N_RTREE 2 80 { .n_name = "_rt_tables"}, 81 #define N_MRTSTAT 3 82 { .n_name = "_mrtstat" }, 83 #define N_MFCTABLE 4 84 { .n_name = "_mfctable" }, 85 #define N_VIFTABLE 5 86 { .n_name = "_viftable" }, 87 #define N_IPX 6 88 { .n_name = "_ipxpcb_list"}, 89 #define N_IPXSTAT 7 90 { .n_name = "_ipxstat"}, 91 #define N_SPXSTAT 8 92 { .n_name = "_spx_istat"}, 93 #define N_DDPSTAT 9 94 { .n_name = "_ddpstat"}, 95 #define N_DDPCB 10 96 { .n_name = "_ddpcb"}, 97 #define N_NGSOCKS 11 98 { .n_name = "_ngsocklist"}, 99 #define N_IP6STAT 12 100 { .n_name = "_ip6stat" }, 101 #define N_ICMP6STAT 13 102 { .n_name = "_icmp6stat" }, 103 #define N_IPSECSTAT 14 104 { .n_name = "_ipsec4stat" }, 105 #define N_IPSEC6STAT 15 106 { .n_name = "_ipsec6stat" }, 107 #define N_PIM6STAT 16 108 { .n_name = "_pim6stat" }, 109 #define N_MRT6STAT 17 110 { .n_name = "_mrt6stat" }, 111 #define N_MF6CTABLE 18 112 { .n_name = "_mf6ctable" }, 113 #define N_MIF6TABLE 19 114 { .n_name = "_mif6table" }, 115 #define N_PFKEYSTAT 20 116 { .n_name = "_pfkeystat" }, 117 #define N_MBSTAT 21 118 { .n_name = "_mbstat" }, 119 #define N_MBTYPES 22 120 { .n_name = "_mbtypes" }, 121 #define N_NMBCLUSTERS 23 122 { .n_name = "_nmbclusters" }, 123 #define N_NMBUFS 24 124 { .n_name = "_nmbufs" }, 125 #define N_MBHI 25 126 { .n_name = "_mbuf_hiwm" }, 127 #define N_CLHI 26 128 { .n_name = "_clust_hiwm" }, 129 #define N_NCPUS 27 130 { .n_name = "_smp_cpus" }, 131 #define N_PAGESZ 28 132 { .n_name = "_pagesize" }, 133 #define N_MBPSTAT 29 134 { .n_name = "_mb_statpcpu" }, 135 #define N_RTTRASH 30 136 { .n_name = "_rttrash" }, 137 #define N_MBLO 31 138 { .n_name = "_mbuf_lowm" }, 139 #define N_CLLO 32 140 { .n_name = "_clust_lowm" }, 141 #define N_CARPSTAT 33 142 { .n_name = "_carpstats" }, 143 #define N_PFSYNCSTAT 34 144 { .n_name = "_pfsyncstats" }, 145 #define N_AHSTAT 35 146 { .n_name = "_ahstat" }, 147 #define N_ESPSTAT 36 148 { .n_name = "_espstat" }, 149 #define N_IPCOMPSTAT 37 150 { .n_name = "_ipcompstat" }, 151 #define N_TCPSTAT 38 152 { .n_name = "_tcpstat" }, 153 #define N_UDPSTAT 39 154 { .n_name = "_udpstat" }, 155 #define N_IPSTAT 40 156 { .n_name = "_ipstat" }, 157 #define N_ICMPSTAT 41 158 { .n_name = "_icmpstat" }, 159 #define N_IGMPSTAT 42 160 { .n_name = "_igmpstat" }, 161 #define N_PIMSTAT 43 162 { .n_name = "_pimstat" }, 163 #define N_TCBINFO 44 164 { .n_name = "_tcbinfo" }, 165 #define N_UDBINFO 45 166 { .n_name = "_udbinfo" }, 167 #define N_DIVCBINFO 46 168 { .n_name = "_divcbinfo" }, 169 #define N_RIPCBINFO 47 170 { .n_name = "_ripcbinfo" }, 171 #define N_UNP_COUNT 48 172 { .n_name = "_unp_count" }, 173 #define N_UNP_GENCNT 49 174 { .n_name = "_unp_gencnt" }, 175 #define N_UNP_DHEAD 50 176 { .n_name = "_unp_dhead" }, 177 #define N_UNP_SHEAD 51 178 { .n_name = "_unp_shead" }, 179 #define N_RIP6STAT 52 180 { .n_name = "_rip6stat" }, 181 #define N_SCTPSTAT 53 182 { .n_name = "_sctpstat" }, 183 { .n_name = NULL }, 184 }; 185 186 struct protox { 187 int pr_index; /* index into nlist of cb head */ 188 int pr_sindex; /* index into nlist of stat block */ 189 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 190 void (*pr_cblocks)(u_long, const char *, int, int); 191 /* control blocks printing routine */ 192 void (*pr_stats)(u_long, const char *, int, int); 193 /* statistics printing routine */ 194 void (*pr_istats)(char *); /* per/if statistics printing routine */ 195 const char *pr_name; /* well-known name */ 196 int pr_usesysctl; /* non-zero if we use sysctl, not kvm */ 197 int pr_protocol; 198 } protox[] = { 199 { N_TCBINFO, N_TCPSTAT, 1, protopr, 200 tcp_stats, NULL, "tcp", 1, IPPROTO_TCP }, 201 { N_UDBINFO, N_UDPSTAT, 1, protopr, 202 udp_stats, NULL, "udp", 1, IPPROTO_UDP }, 203 #ifdef SCTP 204 { -1, N_SCTPSTAT, 1, sctp_protopr, 205 sctp_stats, NULL, "sctp", 1, IPPROTO_SCTP }, 206 #endif 207 { N_DIVCBINFO, -1, 1, protopr, 208 NULL, NULL, "divert", 1, IPPROTO_DIVERT }, 209 { N_RIPCBINFO, N_IPSTAT, 1, protopr, 210 ip_stats, NULL, "ip", 1, IPPROTO_RAW }, 211 { N_RIPCBINFO, N_ICMPSTAT, 1, protopr, 212 icmp_stats, NULL, "icmp", 1, IPPROTO_ICMP }, 213 { N_RIPCBINFO, N_IGMPSTAT, 1, protopr, 214 igmp_stats, NULL, "igmp", 1, IPPROTO_IGMP }, 215 #ifdef IPSEC 216 { -1, N_IPSECSTAT, 1, NULL, /* keep as compat */ 217 ipsec_stats, NULL, "ipsec", 0, 0}, 218 { -1, N_AHSTAT, 1, NULL, 219 ah_stats, NULL, "ah", 0, 0}, 220 { -1, N_ESPSTAT, 1, NULL, 221 esp_stats, NULL, "esp", 0, 0}, 222 { -1, N_IPCOMPSTAT, 1, NULL, 223 ipcomp_stats, NULL, "ipcomp", 0, 0}, 224 #endif 225 { N_RIPCBINFO, N_PIMSTAT, 1, protopr, 226 pim_stats, NULL, "pim", 1, IPPROTO_PIM }, 227 { -1, N_CARPSTAT, 1, NULL, 228 carp_stats, NULL, "carp", 1, 0 }, 229 { -1, N_PFSYNCSTAT, 1, NULL, 230 pfsync_stats, NULL, "pfsync", 1, 0 }, 231 { -1, -1, 0, NULL, 232 NULL, NULL, NULL, 0, 0 } 233 }; 234 235 #ifdef INET6 236 struct protox ip6protox[] = { 237 { N_TCBINFO, N_TCPSTAT, 1, protopr, 238 tcp_stats, NULL, "tcp", 1, IPPROTO_TCP }, 239 { N_UDBINFO, N_UDPSTAT, 1, protopr, 240 udp_stats, NULL, "udp", 1, IPPROTO_UDP }, 241 { N_RIPCBINFO, N_IP6STAT, 1, protopr, 242 ip6_stats, ip6_ifstats, "ip6", 1, IPPROTO_RAW }, 243 { N_RIPCBINFO, N_ICMP6STAT, 1, protopr, 244 icmp6_stats, icmp6_ifstats, "icmp6", 1, IPPROTO_ICMPV6 }, 245 #ifdef IPSEC 246 { -1, N_IPSEC6STAT, 1, NULL, 247 ipsec_stats, NULL, "ipsec6", 0, 0 }, 248 #endif 249 #ifdef notyet 250 { -1, N_PIM6STAT, 1, NULL, 251 pim6_stats, NULL, "pim6", 1, 0 }, 252 #endif 253 { -1, N_RIP6STAT, 1, NULL, 254 rip6_stats, NULL, "rip6", 1, 0 }, 255 { -1, -1, 0, NULL, 256 NULL, NULL, NULL, 0, 0 } 257 }; 258 #endif /*INET6*/ 259 260 #ifdef IPSEC 261 struct protox pfkeyprotox[] = { 262 { -1, N_PFKEYSTAT, 1, NULL, 263 pfkey_stats, NULL, "pfkey", 0, 0 }, 264 { -1, -1, 0, NULL, 265 NULL, NULL, NULL, 0, 0 } 266 }; 267 #endif 268 269 struct protox atalkprotox[] = { 270 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, 271 ddp_stats, NULL, "ddp", 0, 0 }, 272 { -1, -1, 0, NULL, 273 NULL, NULL, NULL, 0, 0 } 274 }; 275 276 struct protox netgraphprotox[] = { 277 { N_NGSOCKS, -1, 1, netgraphprotopr, 278 NULL, NULL, "ctrl", 0, 0 }, 279 { N_NGSOCKS, -1, 1, netgraphprotopr, 280 NULL, NULL, "data", 0, 0 }, 281 { -1, -1, 0, NULL, 282 NULL, NULL, NULL, 0, 0 } 283 }; 284 285 #ifdef IPX 286 struct protox ipxprotox[] = { 287 { N_IPX, N_IPXSTAT, 1, ipxprotopr, 288 ipx_stats, NULL, "ipx", 0, 0 }, 289 { N_IPX, N_SPXSTAT, 1, ipxprotopr, 290 spx_stats, NULL, "spx", 0, 0 }, 291 { -1, -1, 0, NULL, 292 NULL, NULL, 0, 0, 0 } 293 }; 294 #endif 295 296 struct protox *protoprotox[] = { 297 protox, 298 #ifdef INET6 299 ip6protox, 300 #endif 301 #ifdef IPSEC 302 pfkeyprotox, 303 #endif 304 #ifdef IPX 305 ipxprotox, 306 #endif 307 atalkprotox, NULL }; 308 309 static void printproto(struct protox *, const char *); 310 static void usage(void); 311 static struct protox *name2protox(const char *); 312 static struct protox *knownname(const char *); 313 314 static kvm_t *kvmd; 315 static char *nlistf = NULL, *memf = NULL; 316 317 int Aflag; /* show addresses of protocol control block */ 318 int aflag; /* show all sockets (including servers) */ 319 int Bflag; /* show information about bpf consumers */ 320 int bflag; /* show i/f total bytes in/out */ 321 int dflag; /* show i/f dropped packets */ 322 int gflag; /* show group (multicast) routing or stats */ 323 int hflag; /* show counters in human readable format */ 324 int iflag; /* show interfaces */ 325 int Lflag; /* show size of listen queues */ 326 int mflag; /* show memory stats */ 327 int numeric_addr; /* show addresses numerically */ 328 int numeric_port; /* show ports numerically */ 329 static int pflag; /* show given protocol */ 330 int rflag; /* show routing tables (or routing stats) */ 331 int sflag; /* show protocol statistics */ 332 int tflag; /* show i/f watchdog timers */ 333 int Wflag; /* wide display */ 334 int xflag; /* extra information, includes all socket buffer info */ 335 int zflag; /* zero stats */ 336 337 int interval; /* repeat interval for i/f stats */ 338 339 char *interface; /* desired i/f for stats, or NULL for all i/fs */ 340 int unit; /* unit number for above */ 341 342 int af; /* address family */ 343 int live; /* true if we are examining a live system */ 344 345 int 346 main(int argc, char *argv[]) 347 { 348 struct protox *tp = NULL; /* for printing cblocks & stats */ 349 int ch; 350 351 af = AF_UNSPEC; 352 353 while ((ch = getopt(argc, argv, "AaBbdf:ghI:iLlM:mN:np:rSstuWw:xz")) != -1) 354 switch(ch) { 355 case 'A': 356 Aflag = 1; 357 break; 358 case 'a': 359 aflag = 1; 360 break; 361 case 'B': 362 Bflag = 1; 363 break; 364 case 'b': 365 bflag = 1; 366 break; 367 case 'd': 368 dflag = 1; 369 break; 370 case 'f': 371 if (strcmp(optarg, "ipx") == 0) 372 af = AF_IPX; 373 else if (strcmp(optarg, "inet") == 0) 374 af = AF_INET; 375 #ifdef INET6 376 else if (strcmp(optarg, "inet6") == 0) 377 af = AF_INET6; 378 #endif 379 #ifdef IPSEC 380 else if (strcmp(optarg, "pfkey") == 0) 381 af = PF_KEY; 382 #endif 383 else if (strcmp(optarg, "unix") == 0) 384 af = AF_UNIX; 385 else if (strcmp(optarg, "atalk") == 0) 386 af = AF_APPLETALK; 387 else if (strcmp(optarg, "ng") == 0 388 || strcmp(optarg, "netgraph") == 0) 389 af = AF_NETGRAPH; 390 else if (strcmp(optarg, "link") == 0) 391 af = AF_LINK; 392 else { 393 errx(1, "%s: unknown address family", optarg); 394 } 395 break; 396 case 'g': 397 gflag = 1; 398 break; 399 case 'h': 400 hflag = 1; 401 break; 402 case 'I': { 403 char *cp; 404 405 iflag = 1; 406 for (cp = interface = optarg; isalpha(*cp); cp++) 407 continue; 408 unit = atoi(cp); 409 break; 410 } 411 case 'i': 412 iflag = 1; 413 break; 414 case 'L': 415 Lflag = 1; 416 break; 417 case 'M': 418 memf = optarg; 419 break; 420 case 'm': 421 mflag = 1; 422 break; 423 case 'N': 424 nlistf = optarg; 425 break; 426 case 'n': 427 numeric_addr = numeric_port = 1; 428 break; 429 case 'p': 430 if ((tp = name2protox(optarg)) == NULL) { 431 errx(1, 432 "%s: unknown or uninstrumented protocol", 433 optarg); 434 } 435 pflag = 1; 436 break; 437 case 'r': 438 rflag = 1; 439 break; 440 case 's': 441 ++sflag; 442 break; 443 case 'S': 444 numeric_addr = 1; 445 break; 446 case 't': 447 tflag = 1; 448 break; 449 case 'u': 450 af = AF_UNIX; 451 break; 452 case 'W': 453 case 'l': 454 Wflag = 1; 455 break; 456 case 'w': 457 interval = atoi(optarg); 458 iflag = 1; 459 break; 460 case 'x': 461 xflag = 1; 462 break; 463 case 'z': 464 zflag = 1; 465 break; 466 case '?': 467 default: 468 usage(); 469 } 470 argv += optind; 471 argc -= optind; 472 473 #define BACKWARD_COMPATIBILITY 474 #ifdef BACKWARD_COMPATIBILITY 475 if (*argv) { 476 if (isdigit(**argv)) { 477 interval = atoi(*argv); 478 if (interval <= 0) 479 usage(); 480 ++argv; 481 iflag = 1; 482 } 483 if (*argv) { 484 nlistf = *argv; 485 if (*++argv) 486 memf = *argv; 487 } 488 } 489 #endif 490 491 /* 492 * Discard setgid privileges if not the running kernel so that bad 493 * guys can't print interesting stuff from kernel memory. 494 */ 495 live = (nlistf == NULL && memf == NULL); 496 if (!live) 497 setgid(getgid()); 498 499 if (Bflag) { 500 if (!live) 501 usage(); 502 bpf_stats(interface); 503 exit(0); 504 } 505 if (mflag) { 506 if (memf != NULL) { 507 if (kread(0, NULL, 0) == 0) 508 mbpr(kvmd, nl[N_MBSTAT].n_value); 509 } else 510 mbpr(NULL, 0); 511 exit(0); 512 } 513 #if 0 514 /* 515 * Keep file descriptors open to avoid overhead 516 * of open/close on each call to get* routines. 517 */ 518 sethostent(1); 519 setnetent(1); 520 #else 521 /* 522 * This does not make sense any more with DNS being default over 523 * the files. Doing a setXXXXent(1) causes a tcp connection to be 524 * used for the queries, which is slower. 525 */ 526 #endif 527 kread(0, NULL, 0); 528 if (iflag && !sflag) { 529 intpr(interval, nl[N_IFNET].n_value, NULL); 530 exit(0); 531 } 532 if (rflag) { 533 if (sflag) 534 rt_stats(nl[N_RTSTAT].n_value, nl[N_RTTRASH].n_value); 535 else 536 routepr(nl[N_RTREE].n_value); 537 exit(0); 538 } 539 if (gflag) { 540 if (sflag) { 541 if (af == AF_INET || af == AF_UNSPEC) 542 mrt_stats(nl[N_MRTSTAT].n_value); 543 #ifdef INET6 544 if (af == AF_INET6 || af == AF_UNSPEC) 545 mrt6_stats(nl[N_MRT6STAT].n_value); 546 #endif 547 } else { 548 if (af == AF_INET || af == AF_UNSPEC) 549 mroutepr(nl[N_MFCTABLE].n_value, 550 nl[N_VIFTABLE].n_value); 551 #ifdef INET6 552 if (af == AF_INET6 || af == AF_UNSPEC) 553 mroute6pr(nl[N_MF6CTABLE].n_value, 554 nl[N_MIF6TABLE].n_value); 555 #endif 556 } 557 ifmalist_dump(); 558 exit(0); 559 } 560 561 if (tp) { 562 printproto(tp, tp->pr_name); 563 exit(0); 564 } 565 if (af == AF_INET || af == AF_UNSPEC) 566 for (tp = protox; tp->pr_name; tp++) 567 printproto(tp, tp->pr_name); 568 #ifdef INET6 569 if (af == AF_INET6 || af == AF_UNSPEC) 570 for (tp = ip6protox; tp->pr_name; tp++) 571 printproto(tp, tp->pr_name); 572 #endif /*INET6*/ 573 #ifdef IPSEC 574 if (af == PF_KEY || af == AF_UNSPEC) 575 for (tp = pfkeyprotox; tp->pr_name; tp++) 576 printproto(tp, tp->pr_name); 577 #endif /*IPSEC*/ 578 #ifdef IPX 579 if (af == AF_IPX || af == AF_UNSPEC) { 580 for (tp = ipxprotox; tp->pr_name; tp++) 581 printproto(tp, tp->pr_name); 582 } 583 #endif /* IPX */ 584 if (af == AF_APPLETALK || af == AF_UNSPEC) 585 for (tp = atalkprotox; tp->pr_name; tp++) 586 printproto(tp, tp->pr_name); 587 if (af == AF_NETGRAPH || af == AF_UNSPEC) 588 for (tp = netgraphprotox; tp->pr_name; tp++) 589 printproto(tp, tp->pr_name); 590 if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag) 591 unixpr(nl[N_UNP_COUNT].n_value, nl[N_UNP_GENCNT].n_value, 592 nl[N_UNP_DHEAD].n_value, nl[N_UNP_SHEAD].n_value); 593 exit(0); 594 } 595 596 /* 597 * Print out protocol statistics or control blocks (per sflag). 598 * If the interface was not specifically requested, and the symbol 599 * is not in the namelist, ignore this one. 600 */ 601 static void 602 printproto(tp, name) 603 struct protox *tp; 604 const char *name; 605 { 606 void (*pr)(u_long, const char *, int, int); 607 u_long off; 608 609 if (sflag) { 610 if (iflag) { 611 if (tp->pr_istats) 612 intpr(interval, nl[N_IFNET].n_value, 613 tp->pr_istats); 614 else if (pflag) 615 printf("%s: no per-interface stats routine\n", 616 tp->pr_name); 617 return; 618 } else { 619 pr = tp->pr_stats; 620 if (!pr) { 621 if (pflag) 622 printf("%s: no stats routine\n", 623 tp->pr_name); 624 return; 625 } 626 if (tp->pr_usesysctl && live) 627 off = 0; 628 else if (tp->pr_sindex < 0) { 629 if (pflag) 630 printf( 631 "%s: stats routine doesn't work on cores\n", 632 tp->pr_name); 633 return; 634 } else 635 off = nl[tp->pr_sindex].n_value; 636 } 637 } else { 638 pr = tp->pr_cblocks; 639 if (!pr) { 640 if (pflag) 641 printf("%s: no PCB routine\n", tp->pr_name); 642 return; 643 } 644 if (tp->pr_usesysctl && live) 645 off = 0; 646 else if (tp->pr_index < 0) { 647 if (pflag) 648 printf( 649 "%s: PCB routine doesn't work on cores\n", 650 tp->pr_name); 651 return; 652 } else 653 off = nl[tp->pr_index].n_value; 654 } 655 if (pr != NULL && (off || (live && tp->pr_usesysctl) || 656 af != AF_UNSPEC)) 657 (*pr)(off, name, af, tp->pr_protocol); 658 } 659 660 /* 661 * Read kernel memory, return 0 on success. 662 */ 663 int 664 kread(u_long addr, void *buf, size_t size) 665 { 666 char errbuf[_POSIX2_LINE_MAX]; 667 668 if (kvmd == NULL) { 669 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 670 setgid(getgid()); 671 if (kvmd != NULL) { 672 if (kvm_nlist(kvmd, nl) < 0) { 673 if (nlistf) 674 errx(1, "%s: kvm_nlist: %s", nlistf, 675 kvm_geterr(kvmd)); 676 else 677 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd)); 678 } 679 680 if (nl[0].n_type == 0) { 681 if (nlistf) 682 errx(1, "%s: no namelist", nlistf); 683 else 684 errx(1, "no namelist"); 685 } 686 } else { 687 warnx("kvm not available: %s", errbuf); 688 return(-1); 689 } 690 } 691 if (!buf) 692 return (0); 693 if (kvm_read(kvmd, addr, buf, size) != (ssize_t)size) { 694 warnx("%s", kvm_geterr(kvmd)); 695 return (-1); 696 } 697 return (0); 698 } 699 700 const char * 701 plural(uintmax_t n) 702 { 703 return (n != 1 ? "s" : ""); 704 } 705 706 const char * 707 plurales(uintmax_t n) 708 { 709 return (n != 1 ? "es" : ""); 710 } 711 712 const char * 713 pluralies(uintmax_t n) 714 { 715 return (n != 1 ? "ies" : "y"); 716 } 717 718 /* 719 * Find the protox for the given "well-known" name. 720 */ 721 static struct protox * 722 knownname(const char *name) 723 { 724 struct protox **tpp, *tp; 725 726 for (tpp = protoprotox; *tpp; tpp++) 727 for (tp = *tpp; tp->pr_name; tp++) 728 if (strcmp(tp->pr_name, name) == 0) 729 return (tp); 730 return (NULL); 731 } 732 733 /* 734 * Find the protox corresponding to name. 735 */ 736 static struct protox * 737 name2protox(const char *name) 738 { 739 struct protox *tp; 740 char **alias; /* alias from p->aliases */ 741 struct protoent *p; 742 743 /* 744 * Try to find the name in the list of "well-known" names. If that 745 * fails, check if name is an alias for an Internet protocol. 746 */ 747 if ((tp = knownname(name)) != NULL) 748 return (tp); 749 750 setprotoent(1); /* make protocol lookup cheaper */ 751 while ((p = getprotoent()) != NULL) { 752 /* assert: name not same as p->name */ 753 for (alias = p->p_aliases; *alias; alias++) 754 if (strcmp(name, *alias) == 0) { 755 endprotoent(); 756 return (knownname(p->p_name)); 757 } 758 } 759 endprotoent(); 760 return (NULL); 761 } 762 763 static void 764 usage(void) 765 { 766 (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", 767 "usage: netstat [-AaLnSW] [-f protocol_family | -p protocol]\n" 768 " [-M core] [-N system]", 769 " netstat -i | -I interface [-abdhnt] [-f address_family]\n" 770 " [-M core] [-N system]", 771 " netstat -w wait [-I interface] [-d] [-M core] [-N system]", 772 " netstat -s [-s] [-z] [-f protocol_family | -p protocol] [-M core]", 773 " netstat -i | -I interface -s [-f protocol_family | -p protocol]\n" 774 " [-M core] [-N system]", 775 " netstat -m [-M core] [-N system]", 776 " netstat -B [ -I interface]", 777 " netstat -r [-AenW] [-f address_family] [-M core] [-N system]", 778 " netstat -rs [-s] [-M core] [-N system]", 779 " netstat -g [-W] [-f address_family] [-M core] [-N system]", 780 " netstat -gs [-s] [-f address_family] [-M core] [-N system]"); 781 exit(1); 782 } 783