1 /* $OpenBSD: main.c,v 1.38 2003/06/26 21:59:11 deraadt Exp $ */ 2 /* $NetBSD: main.c,v 1.9 1996/05/07 02:55:02 thorpej Exp $ */ 3 4 /* 5 * Copyright (c) 1983, 1988, 1993 6 * Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef lint 34 char copyright[] = 35 "@(#) Copyright (c) 1983, 1988, 1993\n\ 36 Regents of the University of California. All rights reserved.\n"; 37 #endif /* not lint */ 38 39 #ifndef lint 40 #if 0 41 static char sccsid[] = "from: @(#)main.c 8.4 (Berkeley) 3/1/94"; 42 #else 43 static char *rcsid = "$OpenBSD: main.c,v 1.38 2003/06/26 21:59:11 deraadt Exp $"; 44 #endif 45 #endif /* not lint */ 46 47 #include <sys/param.h> 48 #include <sys/file.h> 49 #include <sys/protosw.h> 50 #include <sys/socket.h> 51 52 #include <netinet/in.h> 53 54 #include <ctype.h> 55 #include <errno.h> 56 #include <kvm.h> 57 #include <limits.h> 58 #include <netdb.h> 59 #include <nlist.h> 60 #include <paths.h> 61 #include <stdio.h> 62 #include <stdlib.h> 63 #include <string.h> 64 #include <unistd.h> 65 #include "netstat.h" 66 67 struct nlist nl[] = { 68 #define N_MBSTAT 0 69 { "_mbstat" }, 70 #define N_IPSTAT 1 71 { "_ipstat" }, 72 #define N_TCBTABLE 2 73 { "_tcbtable" }, 74 #define N_TCPSTAT 3 75 { "_tcpstat" }, 76 #define N_UDBTABLE 4 77 { "_udbtable" }, 78 #define N_UDPSTAT 5 79 { "_udpstat" }, 80 #define N_IFNET 6 81 { "_ifnet" }, 82 #define N_IMP 7 83 { "_imp_softc" }, 84 #define N_ICMPSTAT 8 85 { "_icmpstat" }, 86 #define N_RTSTAT 9 87 { "_rtstat" }, 88 #define N_UNIXSW 10 89 { "_unixsw" }, 90 #define N_IDP 11 91 { "_nspcb"}, 92 #define N_IDPSTAT 12 93 { "_idpstat"}, 94 #define N_SPPSTAT 13 95 { "_spp_istat"}, 96 #define N_NSERR 14 97 { "_ns_errstat"}, 98 #define N_CLNPSTAT 15 99 { "_clnp_stat"}, 100 #define IN_NOTUSED 16 101 { "_tp_inpcb" }, 102 #define ISO_TP 17 103 { "_tp_refinfo" }, 104 #define N_TPSTAT 18 105 { "_tp_stat" }, 106 #define N_ESISSTAT 19 107 { "_esis_stat"}, 108 #define N_NIMP 20 109 { "_nimp"}, 110 #define N_RTREE 21 111 { "_rt_tables"}, 112 #define N_CLTP 22 113 { "_cltb"}, 114 #define N_CLTPSTAT 23 115 { "_cltpstat"}, 116 #define N_NFILE 24 117 { "_nfile" }, 118 #define N_FILE 25 119 { "_file" }, 120 #define N_IGMPSTAT 26 121 { "_igmpstat" }, 122 #define N_MRTPROTO 27 123 { "_ip_mrtproto" }, 124 #define N_MRTSTAT 28 125 { "_mrtstat" }, 126 #define N_MFCHASHTBL 29 127 { "_mfchashtbl" }, 128 #define N_MFCHASH 30 129 { "_mfchash" }, 130 #define N_VIFTABLE 31 131 { "_viftable" }, 132 #define N_IPX 32 133 { "_ipxcbtable"}, 134 #define N_IPXSTAT 33 135 { "_ipxstat"}, 136 #define N_SPXSTAT 34 137 { "_spx_istat"}, 138 #define N_IPXERR 35 139 { "_ipx_errstat"}, 140 #define N_AHSTAT 36 141 { "_ahstat"}, 142 #define N_ESPSTAT 37 143 { "_espstat"}, 144 #define N_IP4STAT 38 145 { "_ipipstat"}, 146 #define N_DDPSTAT 39 147 { "_ddpstat"}, 148 #define N_DDPCB 40 149 { "_ddpcb"}, 150 #define N_ETHERIPSTAT 41 151 { "_etheripstat"}, 152 #define N_IP6STAT 42 153 { "_ip6stat" }, 154 #define N_ICMP6STAT 43 155 { "_icmp6stat" }, 156 #define N_IPSECSTAT 44 157 { "_ipsecstat" }, 158 #define N_IPSEC6STAT 45 159 { "_ipsec6stat" }, 160 #define N_PIM6STAT 46 161 { "_pim6stat" }, 162 #define N_MRT6PROTO 47 163 { "_ip6_mrtproto" }, 164 #define N_MRT6STAT 48 165 { "_mrt6stat" }, 166 #define N_MF6CTABLE 49 167 { "_mf6ctable" }, 168 #define N_MIF6TABLE 50 169 { "_mif6table" }, 170 #define N_MBPOOL 51 171 { "_mbpool" }, 172 #define N_MCLPOOL 52 173 { "_mclpool" }, 174 #define N_IPCOMPSTAT 53 175 { "_ipcompstat" }, 176 #define N_RIP6STAT 54 177 { "_rip6stat" }, 178 { ""}, 179 }; 180 181 struct protox { 182 u_char pr_index; /* index into nlist of cb head */ 183 u_char pr_sindex; /* index into nlist of stat block */ 184 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 185 void (*pr_cblocks)(u_long, char *); /* control blocks printing routine */ 186 void (*pr_stats)(u_long, char *); /* statistics printing routine */ 187 char *pr_name; /* well-known name */ 188 } protox[] = { 189 { N_TCBTABLE, N_TCPSTAT, 1, protopr, 190 tcp_stats, "tcp" }, 191 { N_UDBTABLE, N_UDPSTAT, 1, protopr, 192 udp_stats, "udp" }, 193 { -1, N_IPSTAT, 1, 0, 194 ip_stats, "ip" }, 195 { -1, N_ICMPSTAT, 1, 0, 196 icmp_stats, "icmp" }, 197 { -1, N_IGMPSTAT, 1, 0, 198 igmp_stats, "igmp" }, 199 { -1, N_AHSTAT, 1, 0, 200 ah_stats, "ah" }, 201 { -1, N_ESPSTAT, 1, 0, 202 esp_stats, "esp" }, 203 { -1, N_IP4STAT, 1, 0, 204 ipip_stats, "ipencap" }, 205 { -1, N_ETHERIPSTAT, 1, 0, 206 etherip_stats,"etherip" }, 207 { -1, N_IPCOMPSTAT, 1, 0, 208 ipcomp_stats, "ipcomp" }, 209 { -1, -1, 0, 0, 210 0, 0 } 211 }; 212 213 #ifdef INET6 214 struct protox ip6protox[] = { 215 { N_TCBTABLE, N_TCPSTAT, 1, ip6protopr, 216 0, "tcp" }, 217 { N_UDBTABLE, N_UDPSTAT, 1, ip6protopr, 218 0, "udp" }, 219 { -1, N_IP6STAT, 1, 0, 220 ip6_stats, "ip6" }, 221 { -1, N_ICMP6STAT, 1, 0, 222 icmp6_stats, "icmp6" }, 223 { -1, N_PIM6STAT, 1, 0, 224 pim6_stats, "pim6" }, 225 { -1, N_RIP6STAT, 1, 0, 226 rip6_stats, "rip6" }, 227 { -1, -1, 0, 0, 228 0, 0 } 229 }; 230 #endif 231 232 struct protox ipxprotox[] = { 233 { N_IPX, N_IPXSTAT, 1, ipxprotopr, 234 ipx_stats, "ipx" }, 235 { N_IPX, N_SPXSTAT, 1, ipxprotopr, 236 spx_stats, "spx" }, 237 { -1, -1, 0, 0, 238 0, 0 } 239 }; 240 241 struct protox nsprotox[] = { 242 { N_IDP, N_IDPSTAT, 1, nsprotopr, 243 idp_stats, "idp" }, 244 { N_IDP, N_SPPSTAT, 1, nsprotopr, 245 spp_stats, "spp" }, 246 { -1, N_NSERR, 1, 0, 247 nserr_stats, "ns_err" }, 248 { -1, -1, 0, 0, 249 0, 0 } 250 }; 251 252 struct protox isoprotox[] = { 253 { ISO_TP, N_TPSTAT, 1, iso_protopr, 254 tp_stats, "tp" }, 255 { N_CLTP, N_CLTPSTAT, 1, iso_protopr, 256 cltp_stats, "cltp" }, 257 { -1, N_CLNPSTAT, 1, 0, 258 clnp_stats, "clnp"}, 259 { -1, N_ESISSTAT, 1, 0, 260 esis_stats, "esis"}, 261 { -1, -1, 0, 0, 262 0, 0 } 263 }; 264 265 struct protox atalkprotox[] = { 266 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, 267 ddp_stats, "ddp" }, 268 { -1, -1, 0, 0, 269 0, 0 } 270 }; 271 272 #ifndef INET6 273 struct protox *protoprotox[] = { 274 protox, ipxprotox, nsprotox, isoprotox, atalkprotox, NULL 275 }; 276 #else 277 struct protox *protoprotox[] = { 278 protox, ip6protox, ipxprotox, nsprotox, isoprotox, atalkprotox, NULL 279 }; 280 #endif 281 282 static void printproto(struct protox *, char *); 283 static void usage(void); 284 static struct protox *name2protox(char *); 285 static struct protox *knownname(char *); 286 287 kvm_t *kvmd; 288 289 int 290 main(int argc, char *argv[]) 291 { 292 extern char *optarg; 293 extern int optind; 294 struct protoent *p; 295 struct protox *tp = NULL; /* for printing cblocks & stats */ 296 int ch; 297 char *nlistf = NULL, *memf = NULL; 298 char buf[_POSIX2_LINE_MAX]; 299 300 af = AF_UNSPEC; 301 302 while ((ch = getopt(argc, argv, "Aabdf:gI:ilM:mN:np:qrstuvw:")) != -1) 303 switch (ch) { 304 case 'A': 305 Aflag = 1; 306 break; 307 case 'a': 308 aflag = 1; 309 break; 310 case 'b': 311 bflag = 1; 312 break; 313 case 'd': 314 dflag = 1; 315 break; 316 case 'f': 317 if (strcmp(optarg, "inet") == 0) 318 af = AF_INET; 319 else if (strcmp(optarg, "inet6") == 0) 320 af = AF_INET6; 321 else if (strcmp(optarg, "local") == 0) 322 af = AF_LOCAL; 323 else if (strcmp(optarg, "unix") == 0) 324 af = AF_UNIX; 325 else if (strcmp(optarg, "ipx") == 0) 326 af = AF_IPX; 327 else if (strcmp(optarg, "ns") == 0) 328 af = AF_NS; 329 else if (strcmp(optarg, "iso") == 0) 330 af = AF_ISO; 331 else if (strcmp(optarg, "encap") == 0) 332 af = PF_KEY; 333 else if (strcmp(optarg, "atalk") == 0) 334 af = AF_APPLETALK; 335 else { 336 (void)fprintf(stderr, 337 "%s: %s: unknown address family\n", 338 __progname, optarg); 339 exit(1); 340 } 341 break; 342 case 'g': 343 gflag = 1; 344 break; 345 case 'I': 346 iflag = 1; 347 interface = optarg; 348 break; 349 case 'i': 350 iflag = 1; 351 break; 352 case 'l': 353 lflag = 1; 354 break; 355 case 'M': 356 memf = optarg; 357 break; 358 case 'm': 359 mflag = 1; 360 break; 361 case 'N': 362 nlistf = optarg; 363 break; 364 case 'n': 365 nflag = 1; 366 break; 367 case 'p': 368 if ((tp = name2protox(optarg)) == NULL) { 369 (void)fprintf(stderr, 370 "%s: %s: unknown or uninstrumented protocol\n", 371 __progname, optarg); 372 exit(1); 373 } 374 pflag = 1; 375 break; 376 case 'q': 377 qflag = 1; 378 break; 379 case 'r': 380 rflag = 1; 381 break; 382 case 's': 383 ++sflag; 384 break; 385 case 't': 386 tflag = 1; 387 break; 388 case 'u': 389 af = AF_UNIX; 390 break; 391 case 'v': 392 vflag = 1; 393 break; 394 case 'w': 395 interval = atoi(optarg); 396 iflag = 1; 397 break; 398 case '?': 399 default: 400 usage(); 401 } 402 argv += optind; 403 argc -= optind; 404 405 /* 406 * Discard setgid privileges if not the running kernel so that bad 407 * guys can't print interesting stuff from kernel memory. 408 */ 409 if (nlistf != NULL || memf != NULL) { 410 setegid(getgid()); 411 setgid(getgid()); 412 } 413 414 if ((kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, 415 buf)) == NULL) { 416 fprintf(stderr, "%s: kvm_open: %s\n", __progname, buf); 417 exit(1); 418 } 419 setegid(getgid()); 420 setgid(getgid()); 421 422 #define BACKWARD_COMPATIBILITY 423 #ifdef BACKWARD_COMPATIBILITY 424 if (*argv) { 425 if (isdigit(**argv)) { 426 interval = atoi(*argv); 427 if (interval <= 0) 428 usage(); 429 ++argv; 430 iflag = 1; 431 } 432 if (*argv) { 433 nlistf = *argv; 434 if (*++argv) 435 memf = *argv; 436 } 437 } 438 #endif 439 440 if (kvm_nlist(kvmd, nl) < 0 || nl[0].n_type == 0) { 441 if (nlistf) 442 fprintf(stderr, "%s: %s: no namelist\n", __progname, 443 nlistf); 444 else 445 fprintf(stderr, "%s: no namelist\n", __progname); 446 exit(1); 447 } 448 if (mflag) { 449 mbpr(nl[N_MBSTAT].n_value, nl[N_MBPOOL].n_value, 450 nl[N_MCLPOOL].n_value); 451 exit(0); 452 } 453 if (pflag) { 454 if (tp->pr_stats) 455 (*tp->pr_stats)(nl[tp->pr_sindex].n_value, 456 tp->pr_name); 457 else 458 printf("%s: no stats routine\n", tp->pr_name); 459 exit(0); 460 } 461 /* 462 * Keep file descriptors open to avoid overhead 463 * of open/close on each call to get* routines. 464 */ 465 sethostent(1); 466 setnetent(1); 467 if (iflag) { 468 intpr(interval, nl[N_IFNET].n_value); 469 exit(0); 470 } 471 if (rflag) { 472 if (sflag) 473 rt_stats(nl[N_RTSTAT].n_value); 474 else 475 routepr(nl[N_RTREE].n_value); 476 exit(0); 477 } 478 if (gflag) { 479 if (sflag) { 480 if (af == AF_INET || af == AF_UNSPEC) 481 mrt_stats(nl[N_MRTPROTO].n_value, 482 nl[N_MRTSTAT].n_value); 483 #ifdef INET6 484 if (af == AF_INET6 || af == AF_UNSPEC) 485 mrt6_stats(nl[N_MRT6PROTO].n_value, 486 nl[N_MRT6STAT].n_value); 487 #endif 488 } 489 else { 490 if (af == AF_INET || af == AF_UNSPEC) 491 mroutepr(nl[N_MRTPROTO].n_value, 492 nl[N_MFCHASHTBL].n_value, 493 nl[N_MFCHASH].n_value, 494 nl[N_VIFTABLE].n_value); 495 #ifdef INET6 496 if (af == AF_INET6 || af == AF_UNSPEC) 497 mroute6pr(nl[N_MRT6PROTO].n_value, 498 nl[N_MF6CTABLE].n_value, 499 nl[N_MIF6TABLE].n_value); 500 #endif 501 } 502 exit(0); 503 } 504 if (af == AF_INET || af == AF_UNSPEC) { 505 setprotoent(1); 506 setservent(1); 507 /* ugh, this is O(MN) ... why do we do this? */ 508 while ((p = getprotoent())) { 509 for (tp = protox; tp->pr_name; tp++) 510 if (strcmp(tp->pr_name, p->p_name) == 0) 511 break; 512 if (tp->pr_name == 0 || tp->pr_wanted == 0) 513 continue; 514 printproto(tp, p->p_name); 515 } 516 endprotoent(); 517 } 518 #ifdef INET6 519 if (af == AF_INET6 || af == AF_UNSPEC) 520 for (tp = ip6protox; tp->pr_name; tp++) 521 printproto(tp, tp->pr_name); 522 #endif 523 if (af == AF_IPX || af == AF_UNSPEC) 524 for (tp = ipxprotox; tp->pr_name; tp++) 525 printproto(tp, tp->pr_name); 526 if (af == AF_NS || af == AF_UNSPEC) 527 for (tp = nsprotox; tp->pr_name; tp++) 528 printproto(tp, tp->pr_name); 529 if (af == AF_ISO || af == AF_UNSPEC) 530 for (tp = isoprotox; tp->pr_name; tp++) 531 printproto(tp, tp->pr_name); 532 if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag) 533 unixpr(nl[N_UNIXSW].n_value); 534 if (af == AF_APPLETALK || af == AF_UNSPEC) 535 for (tp = atalkprotox; tp->pr_name; tp++) 536 printproto(tp, tp->pr_name); 537 exit(0); 538 } 539 540 /* 541 * Print out protocol statistics or control blocks (per sflag). 542 * If the interface was not specifically requested, and the symbol 543 * is not in the namelist, ignore this one. 544 */ 545 static void 546 printproto(struct protox *tp, char *name) 547 { 548 void (*pr)(u_long, char *); 549 u_char i; 550 551 if (sflag) { 552 pr = tp->pr_stats; 553 i = tp->pr_sindex; 554 } else { 555 pr = tp->pr_cblocks; 556 i = tp->pr_index; 557 } 558 if (pr != NULL && i < sizeof(nl) / sizeof(nl[0]) && 559 (nl[i].n_value || af != AF_UNSPEC)) 560 (*pr)(nl[i].n_value, name); 561 } 562 563 /* 564 * Read kernel memory, return 0 on success. 565 */ 566 int 567 kread(u_long addr, char *buf, int size) 568 { 569 570 if (kvm_read(kvmd, addr, buf, size) != size) { 571 (void)fprintf(stderr, "%s: %s\n", __progname, 572 kvm_geterr(kvmd)); 573 return (-1); 574 } 575 return (0); 576 } 577 578 char * 579 plural(int n) 580 { 581 return (n != 1 ? "s" : ""); 582 } 583 584 char * 585 plurales(int n) 586 { 587 return (n != 1 ? "es" : ""); 588 } 589 590 /* 591 * Find the protox for the given "well-known" name. 592 */ 593 static struct protox * 594 knownname(char *name) 595 { 596 struct protox **tpp, *tp; 597 598 for (tpp = protoprotox; *tpp; tpp++) 599 for (tp = *tpp; tp->pr_name; tp++) 600 if (strcmp(tp->pr_name, name) == 0) 601 return (tp); 602 return (NULL); 603 } 604 605 /* 606 * Find the protox corresponding to name. 607 */ 608 static struct protox * 609 name2protox(char *name) 610 { 611 struct protox *tp; 612 char **alias; /* alias from p->aliases */ 613 struct protoent *p; 614 615 /* 616 * Try to find the name in the list of "well-known" names. If that 617 * fails, check if name is an alias for an Internet protocol. 618 */ 619 if ((tp = knownname(name))) 620 return (tp); 621 622 setprotoent(1); /* make protocol lookup cheaper */ 623 while ((p = getprotoent())) { 624 /* assert: name not same as p->name */ 625 for (alias = p->p_aliases; *alias; alias++) 626 if (strcmp(name, *alias) == 0) { 627 endprotoent(); 628 return (knownname(p->p_name)); 629 } 630 } 631 endprotoent(); 632 return (NULL); 633 } 634 635 static void 636 usage(void) 637 { 638 (void)fprintf(stderr, 639 "usage: %s [-Aan] [-f address_family] [-M core] [-N system]\n", __progname); 640 (void)fprintf(stderr, 641 " %s [-bdgilmnqrstu] [-f address_family] [-M core] [-N system]\n", __progname); 642 (void)fprintf(stderr, 643 " %s [-bdn] [-I interface] [-M core] [-N system] [-w wait]\n", __progname); 644 (void)fprintf(stderr, 645 " %s [-M core] [-N system] [-p protocol]\n", __progname); 646 (void)fprintf(stderr, 647 " %s [-s] [-f address_family] [-i] [-I interface]\n", __progname); 648 exit(1); 649 } 650