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 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)main.c 8.4 (Berkeley) 3/1/94"; 43 #endif 44 static const char rcsid[] = 45 "$FreeBSD$"; 46 #endif /* not lint */ 47 48 #include <sys/param.h> 49 #include <sys/file.h> 50 #include <sys/protosw.h> 51 #include <sys/socket.h> 52 53 #include <netinet/in.h> 54 55 #include <netgraph/ng_socket.h> 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 <stdio.h> 66 #include <stdlib.h> 67 #include <string.h> 68 #include <unistd.h> 69 #include "netstat.h" 70 71 static struct nlist nl[] = { 72 #define N_IFNET 0 73 { "_ifnet" }, 74 #define N_IMP 1 75 { "_imp_softc" }, 76 #define N_RTSTAT 2 77 { "_rtstat" }, 78 #define N_UNIXSW 3 79 { "_localsw" }, 80 #define N_IDP 4 81 { "_nspcb"}, 82 #define N_IDPSTAT 5 83 { "_idpstat"}, 84 #define N_SPPSTAT 6 85 { "_spp_istat"}, 86 #define N_NSERR 7 87 { "_ns_errstat"}, 88 #define N_CLNPSTAT 8 89 { "_clnp_stat"}, 90 #define IN_NOTUSED 9 91 { "_tp_inpcb" }, 92 #define ISO_TP 10 93 { "_tp_refinfo" }, 94 #define N_TPSTAT 11 95 { "_tp_stat" }, 96 #define N_ESISSTAT 12 97 { "_esis_stat"}, 98 #define N_NIMP 13 99 { "_nimp"}, 100 #define N_RTREE 14 101 { "_rt_tables"}, 102 #define N_CLTP 15 103 { "_cltb"}, 104 #define N_CLTPSTAT 16 105 { "_cltpstat"}, 106 #define N_NFILE 17 107 { "_nfile" }, 108 #define N_FILE 18 109 { "_file" }, 110 #define N_MRTSTAT 19 111 { "_mrtstat" }, 112 #define N_MFCTABLE 20 113 { "_mfctable" }, 114 #define N_VIFTABLE 21 115 { "_viftable" }, 116 #define N_IPX 22 117 { "_ipxpcb"}, 118 #define N_IPXSTAT 23 119 { "_ipxstat"}, 120 #define N_SPXSTAT 24 121 { "_spx_istat"}, 122 #define N_DDPSTAT 25 123 { "_ddpstat"}, 124 #define N_DDPCB 26 125 { "_ddpcb"}, 126 #define N_NGSOCKS 27 127 { "_ngsocklist"}, 128 #define N_IP6STAT 28 129 { "_ip6stat" }, 130 #define N_ICMP6STAT 29 131 { "_icmp6stat" }, 132 #define N_IPSECSTAT 30 133 { "_ipsecstat" }, 134 #define N_IPSEC6STAT 31 135 { "_ipsec6stat" }, 136 #define N_PIM6STAT 32 137 { "_pim6stat" }, 138 #define N_MRT6PROTO 33 139 { "_ip6_mrtproto" }, 140 #define N_MRT6STAT 34 141 { "_mrt6stat" }, 142 #define N_MF6CTABLE 35 143 { "_mf6ctable" }, 144 #define N_MIF6TABLE 36 145 { "_mif6table" }, 146 #define N_PFKEYSTAT 37 147 { "_pfkeystat" }, 148 { "" }, 149 }; 150 151 struct protox { 152 u_char pr_index; /* index into nlist of cb head */ 153 u_char pr_sindex; /* index into nlist of stat block */ 154 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 155 void (*pr_cblocks)(); /* control blocks printing routine */ 156 void (*pr_stats)(); /* statistics printing routine */ 157 void (*pr_istats)(); /* per/if statistics printing routine */ 158 char *pr_name; /* well-known name */ 159 int pr_usesysctl; /* true if we use sysctl, not kvm */ 160 } protox[] = { 161 { -1, -1, 1, protopr, 162 tcp_stats, NULL, "tcp", IPPROTO_TCP }, 163 { -1, -1, 1, protopr, 164 udp_stats, NULL, "udp", IPPROTO_UDP }, 165 { -1, -1, 1, protopr, 166 NULL, NULL, "divert",IPPROTO_DIVERT }, 167 { -1, -1, 1, protopr, 168 ip_stats, NULL, "ip", IPPROTO_RAW }, 169 { -1, -1, 1, protopr, 170 icmp_stats, NULL, "icmp", IPPROTO_ICMP }, 171 { -1, -1, 1, protopr, 172 igmp_stats, NULL, "igmp", IPPROTO_IGMP }, 173 #ifdef IPSEC 174 { -1, N_IPSECSTAT, 1, 0, 175 ipsec_stats, NULL, "ipsec", 0}, 176 #endif 177 { -1, -1, 1, 0, 178 bdg_stats, NULL, "bdg", 1 /* bridging... */ }, 179 { -1, -1, 0, 0, 180 0, NULL, 0 } 181 }; 182 183 #ifdef INET6 184 struct protox ip6protox[] = { 185 { -1, -1, 1, protopr, 186 tcp_stats, NULL, "tcp", IPPROTO_TCP }, 187 { -1, -1, 1, protopr, 188 udp_stats, NULL, "udp", IPPROTO_UDP }, 189 { -1, N_IP6STAT, 1, 0, 190 ip6_stats, ip6_ifstats, "ip6", 0 }, 191 { -1, N_ICMP6STAT, 1, 0, 192 icmp6_stats, icmp6_ifstats, "icmp6",0 }, 193 #ifdef IPSEC 194 { -1, N_IPSEC6STAT, 1, 0, 195 ipsec_stats, NULL, "ipsec6",0 }, 196 #endif 197 #ifdef notyet 198 { -1, N_PIM6STAT, 1, 0, 199 pim6_stats, NULL, "pim6", 0 }, 200 #endif 201 { -1, -1, 1, 0, 202 bdg_stats, NULL, "bdg", 1 /* bridging... */ }, 203 { -1, -1, 0, 0, 204 0, NULL, 0, 0 } 205 }; 206 #endif /*INET6*/ 207 208 #ifdef IPSEC 209 struct protox pfkeyprotox[] = { 210 { -1, N_PFKEYSTAT, 1, 0, 211 pfkey_stats, NULL, "pfkey", 0 }, 212 { -1, -1, 0, 0, 213 0, NULL, 0, 0 } 214 }; 215 #endif 216 217 struct protox atalkprotox[] = { 218 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, 219 ddp_stats, NULL, "ddp" }, 220 { -1, -1, 0, 0, 221 0, NULL, 0 } 222 }; 223 224 struct protox netgraphprotox[] = { 225 { N_NGSOCKS, -1, 1, netgraphprotopr, 226 NULL, NULL, "ctrl" }, 227 { N_NGSOCKS, -1, 1, netgraphprotopr, 228 NULL, NULL, "data" }, 229 { -1, NULL, 0, 0, 230 0, NULL, 0 } 231 }; 232 233 struct protox ipxprotox[] = { 234 { N_IPX, N_IPXSTAT, 1, ipxprotopr, 235 ipx_stats, NULL, "ipx", 0 }, 236 { N_IPX, N_SPXSTAT, 1, ipxprotopr, 237 spx_stats, NULL, "spx", 0 }, 238 { -1, -1, 0, 0, 239 0, NULL, 0, 0 } 240 }; 241 242 #ifdef NS 243 struct protox nsprotox[] = { 244 { N_IDP, N_IDPSTAT, 1, nsprotopr, 245 idp_stats, NULL, "idp" }, 246 { N_IDP, N_SPPSTAT, 1, nsprotopr, 247 spp_stats, NULL, "spp" }, 248 { -1, N_NSERR, 1, 0, 249 nserr_stats, NULL, "ns_err" }, 250 { -1, -1, 0, 0, 251 0, NULL, 0 } 252 }; 253 #endif 254 255 #ifdef ISO 256 struct protox isoprotox[] = { 257 { ISO_TP, N_TPSTAT, 1, iso_protopr, 258 tp_stats, NULL, "tp" }, 259 { N_CLTP, N_CLTPSTAT, 1, iso_protopr, 260 cltp_stats, NULL, "cltp" }, 261 { -1, N_CLNPSTAT, 1, 0, 262 clnp_stats, NULL, "clnp"}, 263 { -1, N_ESISSTAT, 1, 0, 264 esis_stats, NULL, "esis"}, 265 { -1, -1, 0, 0, 266 0, NULL, 0 } 267 }; 268 #endif 269 270 struct protox *protoprotox[] = { 271 protox, 272 #ifdef INET6 273 ip6protox, 274 #endif 275 #ifdef IPSEC 276 pfkeyprotox, 277 #endif 278 ipxprotox, atalkprotox, 279 #ifdef NS 280 nsprotox, 281 #endif 282 #ifdef ISO 283 isoprotox, 284 #endif 285 NULL }; 286 287 static void printproto __P((struct protox *, char *)); 288 static void usage __P((void)); 289 static struct protox *name2protox __P((char *)); 290 static struct protox *knownname __P((char *)); 291 292 static kvm_t *kvmd; 293 char *nlistf = NULL, *memf = NULL; 294 295 int 296 main(argc, argv) 297 int argc; 298 char *argv[]; 299 { 300 register struct protox *tp = NULL; /* for printing cblocks & stats */ 301 int ch; 302 303 af = AF_UNSPEC; 304 305 while ((ch = getopt(argc, argv, "Aabdf:ghI:lLiM:mN:np:rstuw:")) != -1) 306 switch(ch) { 307 case 'A': 308 Aflag = 1; 309 break; 310 case 'a': 311 aflag = 1; 312 break; 313 case 'b': 314 bflag = 1; 315 break; 316 case 'd': 317 dflag = 1; 318 break; 319 case 'f': 320 #ifdef NS 321 if (strcmp(optarg, "ns") == 0) 322 af = AF_NS; 323 else 324 #endif 325 if (strcmp(optarg, "ipx") == 0) 326 af = AF_IPX; 327 else if (strcmp(optarg, "inet") == 0) 328 af = AF_INET; 329 #ifdef INET6 330 else if (strcmp(optarg, "inet6") == 0) 331 af = AF_INET6; 332 #endif /*INET6*/ 333 #ifdef INET6 334 else if (strcmp(optarg, "pfkey") == 0) 335 af = PF_KEY; 336 #endif /*INET6*/ 337 else if (strcmp(optarg, "unix") == 0) 338 af = AF_UNIX; 339 else if (strcmp(optarg, "atalk") == 0) 340 af = AF_APPLETALK; 341 else if (strcmp(optarg, "ng") == 0 342 || strcmp(optarg, "netgraph") == 0) 343 af = AF_NETGRAPH; 344 #ifdef ISO 345 else if (strcmp(optarg, "iso") == 0) 346 af = AF_ISO; 347 #endif 348 else { 349 errx(1, "%s: unknown address family", optarg); 350 } 351 break; 352 case 'g': 353 gflag = 1; 354 break; 355 case 'I': { 356 char *cp; 357 358 iflag = 1; 359 for (cp = interface = optarg; isalpha(*cp); cp++) 360 continue; 361 unit = atoi(cp); 362 break; 363 } 364 case 'i': 365 iflag = 1; 366 break; 367 case 'l': 368 lflag = 1; 369 break; 370 case 'L': 371 Lflag = 1; 372 break; 373 case 'M': 374 memf = optarg; 375 break; 376 case 'm': 377 mflag = 1; 378 break; 379 case 'N': 380 nlistf = optarg; 381 break; 382 case 'n': 383 nflag = 1; 384 break; 385 case 'p': 386 if ((tp = name2protox(optarg)) == NULL) { 387 errx(1, 388 "%s: unknown or uninstrumented protocol", 389 optarg); 390 } 391 pflag = 1; 392 break; 393 case 'r': 394 rflag = 1; 395 break; 396 case 's': 397 ++sflag; 398 break; 399 case 't': 400 tflag = 1; 401 break; 402 case 'u': 403 af = AF_UNIX; 404 break; 405 case 'w': 406 interval = atoi(optarg); 407 iflag = 1; 408 break; 409 case '?': 410 default: 411 usage(); 412 } 413 argv += optind; 414 argc -= optind; 415 416 #define BACKWARD_COMPATIBILITY 417 #ifdef BACKWARD_COMPATIBILITY 418 if (*argv) { 419 if (isdigit(**argv)) { 420 interval = atoi(*argv); 421 if (interval <= 0) 422 usage(); 423 ++argv; 424 iflag = 1; 425 } 426 if (*argv) { 427 nlistf = *argv; 428 if (*++argv) 429 memf = *argv; 430 } 431 } 432 #endif 433 434 /* 435 * Discard setgid privileges if not the running kernel so that bad 436 * guys can't print interesting stuff from kernel memory. 437 */ 438 if (nlistf != NULL || memf != NULL) 439 setgid(getgid()); 440 441 if (mflag) { 442 mbpr(); 443 exit(0); 444 } 445 if (pflag) { 446 if (iflag && tp->pr_istats) { 447 kread(0, 0, 0); 448 intpr(interval, nl[N_IFNET].n_value, tp->pr_istats); 449 exit(0); 450 } 451 if (!tp->pr_stats) { 452 printf("%s: no stats routine\n", tp->pr_name); 453 exit(0); 454 } 455 if (tp->pr_usesysctl) { 456 (*tp->pr_stats)(tp->pr_usesysctl, tp->pr_name); 457 } else { 458 kread(0, 0, 0); 459 (*tp->pr_stats)(nl[tp->pr_sindex].n_value, 460 tp->pr_name); 461 } 462 exit(0); 463 } 464 #if 0 465 /* 466 * Keep file descriptors open to avoid overhead 467 * of open/close on each call to get* routines. 468 */ 469 sethostent(1); 470 setnetent(1); 471 #else 472 /* 473 * This does not make sense any more with DNS being default over 474 * the files. Doing a setXXXXent(1) causes a tcp connection to be 475 * used for the queries, which is slower. 476 */ 477 #endif 478 if (iflag) { 479 if (sflag && af != AF_UNSPEC) 480 goto protostat; 481 482 kread(0, 0, 0); 483 intpr(interval, nl[N_IFNET].n_value, NULL); 484 exit(0); 485 } 486 if (rflag) { 487 kread(0, 0, 0); 488 if (sflag) 489 rt_stats(nl[N_RTSTAT].n_value); 490 else 491 routepr(nl[N_RTREE].n_value); 492 exit(0); 493 } 494 if (gflag) { 495 kread(0, 0, 0); 496 if (sflag) { 497 if (af == AF_INET || af == AF_UNSPEC) 498 mrt_stats(nl[N_MRTSTAT].n_value); 499 #ifdef INET6 500 if (af == AF_INET6 || af == AF_UNSPEC) 501 mrt6_stats(nl[N_MRT6STAT].n_value); 502 #endif 503 } else { 504 if (af == AF_INET || af == AF_UNSPEC) 505 mroutepr(nl[N_MFCTABLE].n_value, 506 nl[N_VIFTABLE].n_value); 507 #ifdef INET6 508 if (af == AF_INET6 || af == AF_UNSPEC) 509 mroute6pr(nl[N_MF6CTABLE].n_value, 510 nl[N_MIF6TABLE].n_value); 511 #endif 512 } 513 exit(0); 514 } 515 516 protostat: 517 kread(0, 0, 0); 518 if (af == AF_INET || af == AF_UNSPEC) 519 for (tp = protox; tp->pr_name; tp++) 520 printproto(tp, tp->pr_name); 521 #ifdef INET6 522 if (af == AF_INET6 || af == AF_UNSPEC) 523 for (tp = ip6protox; tp->pr_name; tp++) 524 printproto(tp, tp->pr_name); 525 #endif /*INET6*/ 526 #ifdef IPSEC 527 if (af == PF_KEY || af == AF_UNSPEC) 528 for (tp = pfkeyprotox; tp->pr_name; tp++) 529 printproto(tp, tp->pr_name); 530 #endif /*IPSEC*/ 531 if (af == AF_IPX || af == AF_UNSPEC) { 532 kread(0, 0, 0); 533 for (tp = ipxprotox; tp->pr_name; tp++) 534 printproto(tp, tp->pr_name); 535 } 536 if (af == AF_APPLETALK || af == AF_UNSPEC) 537 for (tp = atalkprotox; tp->pr_name; tp++) 538 printproto(tp, tp->pr_name); 539 if (af == AF_NETGRAPH || af == AF_UNSPEC) 540 for (tp = netgraphprotox; tp->pr_name; tp++) 541 printproto(tp, tp->pr_name); 542 #ifdef NS 543 if (af == AF_NS || af == AF_UNSPEC) 544 for (tp = nsprotox; tp->pr_name; tp++) 545 printproto(tp, tp->pr_name); 546 #endif 547 #ifdef ISO 548 if (af == AF_ISO || af == AF_UNSPEC) 549 for (tp = isoprotox; tp->pr_name; tp++) 550 printproto(tp, tp->pr_name); 551 #endif 552 if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag) 553 unixpr(); 554 exit(0); 555 } 556 557 /* 558 * Print out protocol statistics or control blocks (per sflag). 559 * If the interface was not specifically requested, and the symbol 560 * is not in the namelist, ignore this one. 561 */ 562 static void 563 printproto(tp, name) 564 register struct protox *tp; 565 char *name; 566 { 567 void (*pr)(); 568 u_long off; 569 570 if (sflag) { 571 if (iflag) { 572 if (tp->pr_istats) 573 intpr(interval, nl[N_IFNET].n_value, 574 tp->pr_istats); 575 return; 576 } 577 else { 578 pr = tp->pr_stats; 579 off = tp->pr_usesysctl ? tp->pr_usesysctl 580 : nl[tp->pr_sindex].n_value; 581 } 582 } else { 583 pr = tp->pr_cblocks; 584 off = tp->pr_usesysctl ? tp->pr_usesysctl 585 : nl[tp->pr_index].n_value; 586 } 587 if (pr != NULL && (off || af != AF_UNSPEC)) 588 (*pr)(off, name, af); 589 } 590 591 /* 592 * Read kernel memory, return 0 on success. 593 */ 594 int 595 kread(addr, buf, size) 596 u_long addr; 597 char *buf; 598 int size; 599 { 600 if (kvmd == 0) { 601 /* 602 * XXX. 603 */ 604 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf); 605 if (kvmd != NULL) { 606 if (kvm_nlist(kvmd, nl) < 0) { 607 if(nlistf) 608 errx(1, "%s: kvm_nlist: %s", nlistf, 609 kvm_geterr(kvmd)); 610 else 611 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd)); 612 } 613 614 if (nl[0].n_type == 0) { 615 if(nlistf) 616 errx(1, "%s: no namelist", nlistf); 617 else 618 errx(1, "no namelist"); 619 } 620 } else { 621 warnx("kvm not available"); 622 return(-1); 623 } 624 } 625 if (!buf) 626 return (0); 627 if (kvm_read(kvmd, addr, buf, size) != size) { 628 warnx("%s", kvm_geterr(kvmd)); 629 return (-1); 630 } 631 return (0); 632 } 633 634 char * 635 plural(n) 636 int n; 637 { 638 return (n != 1 ? "s" : ""); 639 } 640 641 char * 642 plurales(n) 643 int n; 644 { 645 return (n != 1 ? "es" : ""); 646 } 647 648 /* 649 * Find the protox for the given "well-known" name. 650 */ 651 static struct protox * 652 knownname(name) 653 char *name; 654 { 655 struct protox **tpp, *tp; 656 657 for (tpp = protoprotox; *tpp; tpp++) 658 for (tp = *tpp; tp->pr_name; tp++) 659 if (strcmp(tp->pr_name, name) == 0) 660 return (tp); 661 return (NULL); 662 } 663 664 /* 665 * Find the protox corresponding to name. 666 */ 667 static struct protox * 668 name2protox(name) 669 char *name; 670 { 671 struct protox *tp; 672 char **alias; /* alias from p->aliases */ 673 struct protoent *p; 674 675 /* 676 * Try to find the name in the list of "well-known" names. If that 677 * fails, check if name is an alias for an Internet protocol. 678 */ 679 if ((tp = knownname(name)) != NULL) 680 return (tp); 681 682 setprotoent(1); /* make protocol lookup cheaper */ 683 while ((p = getprotoent()) != NULL) { 684 /* assert: name not same as p->name */ 685 for (alias = p->p_aliases; *alias; alias++) 686 if (strcmp(name, *alias) == 0) { 687 endprotoent(); 688 return (knownname(p->p_name)); 689 } 690 } 691 endprotoent(); 692 return (NULL); 693 } 694 695 static void 696 usage() 697 { 698 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n", 699 "usage: netstat [-AaLln] [-f address_family] [-M core] [-N system]", 700 " netstat [-abdghilmnrs] [-f address_family] [-M core] [-N system]", 701 " netstat [-bdn] [-I interface] [-M core] [-N system] [-w wait]", 702 " netstat [-M core] [-N system] [-p protocol]"); 703 exit(1); 704 } 705 706 void 707 trimdomain(cp) 708 char *cp; 709 { 710 static char domain[MAXHOSTNAMELEN + 1]; 711 static int first = 1; 712 char *s; 713 714 if (first) { 715 first = 0; 716 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 717 (s = strchr(domain, '.'))) 718 (void) strcpy(domain, s + 1); 719 else 720 domain[0] = 0; 721 } 722 723 if (domain[0]) { 724 while ((cp = strchr(cp, '.'))) { 725 if (!strcasecmp(cp + 1, domain)) { 726 *cp = 0; /* hit it */ 727 break; 728 } else { 729 cp++; 730 } 731 } 732 } 733 } 734 735