1 /* $OpenBSD: main.c,v 1.26 2001/07/05 08:47:44 jjbg 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. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 char copyright[] = 39 "@(#) Copyright (c) 1983, 1988, 1993\n\ 40 Regents of the University of California. All rights reserved.\n"; 41 #endif /* not lint */ 42 43 #ifndef lint 44 #if 0 45 static char sccsid[] = "from: @(#)main.c 8.4 (Berkeley) 3/1/94"; 46 #else 47 static char *rcsid = "$OpenBSD: main.c,v 1.26 2001/07/05 08:47:44 jjbg Exp $"; 48 #endif 49 #endif /* not lint */ 50 51 #include <sys/param.h> 52 #include <sys/file.h> 53 #include <sys/protosw.h> 54 #include <sys/socket.h> 55 56 #include <netinet/in.h> 57 58 #include <ctype.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 struct nlist nl[] = { 72 #define N_MBSTAT 0 73 { "_mbstat" }, 74 #define N_IPSTAT 1 75 { "_ipstat" }, 76 #define N_TCBTABLE 2 77 { "_tcbtable" }, 78 #define N_TCPSTAT 3 79 { "_tcpstat" }, 80 #define N_UDBTABLE 4 81 { "_udbtable" }, 82 #define N_UDPSTAT 5 83 { "_udpstat" }, 84 #define N_IFNET 6 85 { "_ifnet" }, 86 #define N_IMP 7 87 { "_imp_softc" }, 88 #define N_ICMPSTAT 8 89 { "_icmpstat" }, 90 #define N_RTSTAT 9 91 { "_rtstat" }, 92 #define N_UNIXSW 10 93 { "_unixsw" }, 94 #define N_IDP 11 95 { "_nspcb"}, 96 #define N_IDPSTAT 12 97 { "_idpstat"}, 98 #define N_SPPSTAT 13 99 { "_spp_istat"}, 100 #define N_NSERR 14 101 { "_ns_errstat"}, 102 #define N_CLNPSTAT 15 103 { "_clnp_stat"}, 104 #define IN_NOTUSED 16 105 { "_tp_inpcb" }, 106 #define ISO_TP 17 107 { "_tp_refinfo" }, 108 #define N_TPSTAT 18 109 { "_tp_stat" }, 110 #define N_ESISSTAT 19 111 { "_esis_stat"}, 112 #define N_NIMP 20 113 { "_nimp"}, 114 #define N_RTREE 21 115 { "_rt_tables"}, 116 #define N_CLTP 22 117 { "_cltb"}, 118 #define N_CLTPSTAT 23 119 { "_cltpstat"}, 120 #define N_NFILE 24 121 { "_nfile" }, 122 #define N_FILE 25 123 { "_file" }, 124 #define N_IGMPSTAT 26 125 { "_igmpstat" }, 126 #define N_MRTPROTO 27 127 { "_ip_mrtproto" }, 128 #define N_MRTSTAT 28 129 { "_mrtstat" }, 130 #define N_MFCHASHTBL 29 131 { "_mfchashtbl" }, 132 #define N_MFCHASH 30 133 { "_mfchash" }, 134 #define N_VIFTABLE 31 135 { "_viftable" }, 136 #define N_IPX 32 137 { "_ipxcbtable"}, 138 #define N_IPXSTAT 33 139 { "_ipxstat"}, 140 #define N_SPXSTAT 34 141 { "_spx_istat"}, 142 #define N_IPXERR 35 143 { "_ipx_errstat"}, 144 #define N_AHSTAT 36 145 { "_ahstat"}, 146 #define N_ESPSTAT 37 147 { "_espstat"}, 148 #define N_IP4STAT 38 149 { "_ipipstat"}, 150 #define N_DDPSTAT 39 151 { "_ddpstat"}, 152 #define N_DDPCB 40 153 { "_ddpcb"}, 154 #define N_ETHERIPSTAT 41 155 { "_etheripstat"}, 156 #define N_IP6STAT 42 157 { "_ip6stat" }, 158 #define N_ICMP6STAT 43 159 { "_icmp6stat" }, 160 #define N_IPSECSTAT 44 161 { "_ipsecstat" }, 162 #define N_IPSEC6STAT 45 163 { "_ipsec6stat" }, 164 #define N_PIM6STAT 46 165 { "_pim6stat" }, 166 #define N_MRT6PROTO 47 167 { "_ip6_mrtproto" }, 168 #define N_MRT6STAT 48 169 { "_mrt6stat" }, 170 #define N_MF6CTABLE 49 171 { "_mf6ctable" }, 172 #define N_MIF6TABLE 50 173 { "_mif6table" }, 174 #define N_MBPOOL 51 175 { "_mbpool" }, 176 #define N_MCLPOOL 52 177 { "_mclpool" }, 178 #define N_IPCOMPSTAT 53 179 { "_ipcompstat" }, 180 { ""}, 181 }; 182 183 struct protox { 184 u_char pr_index; /* index into nlist of cb head */ 185 u_char pr_sindex; /* index into nlist of stat block */ 186 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 187 void (*pr_cblocks)(); /* control blocks printing routine */ 188 void (*pr_stats)(); /* statistics printing routine */ 189 char *pr_name; /* well-known name */ 190 } protox[] = { 191 { N_TCBTABLE, N_TCPSTAT, 1, protopr, 192 tcp_stats, "tcp" }, 193 { N_UDBTABLE, N_UDPSTAT, 1, protopr, 194 udp_stats, "udp" }, 195 { -1, N_IPSTAT, 1, 0, 196 ip_stats, "ip" }, 197 { -1, N_ICMPSTAT, 1, 0, 198 icmp_stats, "icmp" }, 199 { -1, N_IGMPSTAT, 1, 0, 200 igmp_stats, "igmp" }, 201 { -1, N_AHSTAT, 1, 0, 202 ah_stats, "ah" }, 203 { -1, N_ESPSTAT, 1, 0, 204 esp_stats, "esp" }, 205 { -1, N_IP4STAT, 1, 0, 206 ipip_stats, "ipencap" }, 207 { -1, N_ETHERIPSTAT, 1, 0, 208 etherip_stats,"etherip" }, 209 { -1, N_IPCOMPSTAT, 1, 0, 210 ipcomp_stats, "ipcomp" }, 211 { -1, -1, 0, 0, 212 0, 0 } 213 }; 214 215 #ifdef INET6 216 struct protox ip6protox[] = { 217 { N_TCBTABLE, N_TCPSTAT, 1, ip6protopr, 218 0, "tcp" }, 219 { N_UDBTABLE, N_UDPSTAT, 1, ip6protopr, 220 0, "udp" }, 221 { -1, N_IP6STAT, 1, 0, 222 ip6_stats, "ip6" }, 223 { -1, N_ICMP6STAT, 1, 0, 224 icmp6_stats, "icmp6" }, 225 { -1, N_PIM6STAT, 1, 0, 226 pim6_stats, "pim6" }, 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[] = { protox, ipxprotox, nsprotox, isoprotox, atalkprotox, NULL }; 274 #else 275 struct protox *protoprotox[] = { protox, ip6protox, ipxprotox, nsprotox, isoprotox, atalkprotox, NULL }; 276 #endif 277 278 static void printproto __P((struct protox *, char *)); 279 static void usage __P((void)); 280 static struct protox *name2protox __P((char *)); 281 static struct protox *knownname __P((char *)); 282 283 kvm_t *kvmd; 284 285 int 286 main(argc, argv) 287 int argc; 288 char *argv[]; 289 { 290 extern char *optarg; 291 extern int optind; 292 register struct protoent *p; 293 register struct protox *tp = NULL; /* for printing cblocks & stats */ 294 int ch; 295 char *nlistf = NULL, *memf = NULL; 296 char buf[_POSIX2_LINE_MAX]; 297 298 af = AF_UNSPEC; 299 300 while ((ch = getopt(argc, argv, "Aabdf:gI:ilM:mN:np:rstuvw:")) != -1) 301 switch(ch) { 302 case 'A': 303 Aflag = 1; 304 break; 305 case 'a': 306 aflag = 1; 307 break; 308 case 'b': 309 bflag = 1; 310 break; 311 case 'd': 312 dflag = 1; 313 break; 314 case 'f': 315 if (strcmp(optarg, "inet") == 0) 316 af = AF_INET; 317 else if (strcmp(optarg, "inet6") == 0) 318 af = AF_INET6; 319 else if (strcmp(optarg, "local") == 0) 320 af = AF_LOCAL; 321 else if (strcmp(optarg, "unix") == 0) 322 af = AF_UNIX; 323 else if (strcmp(optarg, "ipx") == 0) 324 af = AF_IPX; 325 else if (strcmp(optarg, "ns") == 0) 326 af = AF_NS; 327 else if (strcmp(optarg, "iso") == 0) 328 af = AF_ISO; 329 else if (strcmp(optarg, "encap") == 0) 330 af = PF_KEY; 331 else if (strcmp(optarg, "atalk") == 0) 332 af = AF_APPLETALK; 333 else { 334 (void)fprintf(stderr, 335 "%s: %s: unknown address family\n", 336 __progname, optarg); 337 exit(1); 338 } 339 break; 340 case 'g': 341 gflag = 1; 342 break; 343 case 'I': 344 iflag = 1; 345 interface = optarg; 346 break; 347 case 'i': 348 iflag = 1; 349 break; 350 case 'l': 351 lflag = 1; 352 break; 353 case 'M': 354 memf = optarg; 355 break; 356 case 'm': 357 mflag = 1; 358 break; 359 case 'N': 360 nlistf = optarg; 361 break; 362 case 'n': 363 nflag = 1; 364 break; 365 case 'p': 366 if ((tp = name2protox(optarg)) == NULL) { 367 (void)fprintf(stderr, 368 "%s: %s: unknown or uninstrumented protocol\n", 369 __progname, optarg); 370 exit(1); 371 } 372 pflag = 1; 373 break; 374 case 'r': 375 rflag = 1; 376 break; 377 case 's': 378 ++sflag; 379 break; 380 case 't': 381 tflag = 1; 382 break; 383 case 'u': 384 af = AF_UNIX; 385 break; 386 case 'v': 387 vflag = 1; 388 break; 389 case 'w': 390 interval = atoi(optarg); 391 iflag = 1; 392 break; 393 case '?': 394 default: 395 usage(); 396 } 397 argv += optind; 398 argc -= optind; 399 400 #define BACKWARD_COMPATIBILITY 401 #ifdef BACKWARD_COMPATIBILITY 402 if (*argv) { 403 if (isdigit(**argv)) { 404 interval = atoi(*argv); 405 if (interval <= 0) 406 usage(); 407 ++argv; 408 iflag = 1; 409 } 410 if (*argv) { 411 nlistf = *argv; 412 if (*++argv) 413 memf = *argv; 414 } 415 } 416 #endif 417 418 /* 419 * Discard setgid privileges if not the running kernel so that bad 420 * guys can't print interesting stuff from kernel memory. 421 */ 422 if (nlistf != NULL || memf != NULL) { 423 setegid(getgid()); 424 setgid(getgid()); 425 } 426 427 if ((kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, 428 buf)) == NULL) { 429 fprintf(stderr, "%s: kvm_open: %s\n", __progname, buf); 430 exit(1); 431 } 432 setegid(getgid()); 433 setgid(getgid()); 434 435 if (kvm_nlist(kvmd, nl) < 0 || nl[0].n_type == 0) { 436 if (nlistf) 437 fprintf(stderr, "%s: %s: no namelist\n", __progname, 438 nlistf); 439 else 440 fprintf(stderr, "%s: no namelist\n", __progname); 441 exit(1); 442 } 443 if (mflag) { 444 mbpr(nl[N_MBSTAT].n_value, nl[N_MBPOOL].n_value, 445 nl[N_MCLPOOL].n_value); 446 exit(0); 447 } 448 if (pflag) { 449 if (tp->pr_stats) 450 (*tp->pr_stats)(nl[tp->pr_sindex].n_value, 451 tp->pr_name); 452 else 453 printf("%s: no stats routine\n", tp->pr_name); 454 exit(0); 455 } 456 /* 457 * Keep file descriptors open to avoid overhead 458 * of open/close on each call to get* routines. 459 */ 460 sethostent(1); 461 setnetent(1); 462 if (iflag) { 463 intpr(interval, nl[N_IFNET].n_value); 464 exit(0); 465 } 466 if (rflag) { 467 if (sflag) 468 rt_stats(nl[N_RTSTAT].n_value); 469 else 470 routepr(nl[N_RTREE].n_value); 471 exit(0); 472 } 473 if (gflag) { 474 if (sflag) { 475 if (af == AF_INET || af == AF_UNSPEC) 476 mrt_stats(nl[N_MRTPROTO].n_value, 477 nl[N_MRTSTAT].n_value); 478 #ifdef INET6 479 if (af == AF_INET6 || af == AF_UNSPEC) 480 mrt6_stats(nl[N_MRT6PROTO].n_value, 481 nl[N_MRT6STAT].n_value); 482 #endif 483 } 484 else { 485 if (af == AF_INET || af == AF_UNSPEC) 486 mroutepr(nl[N_MRTPROTO].n_value, 487 nl[N_MFCHASHTBL].n_value, 488 nl[N_MFCHASH].n_value, 489 nl[N_VIFTABLE].n_value); 490 #ifdef INET6 491 if (af == AF_INET6 || af == AF_UNSPEC) 492 mroute6pr(nl[N_MRT6PROTO].n_value, 493 nl[N_MF6CTABLE].n_value, 494 nl[N_MIF6TABLE].n_value); 495 #endif 496 } 497 exit(0); 498 } 499 if (af == AF_INET || af == AF_UNSPEC) { 500 setprotoent(1); 501 setservent(1); 502 /* ugh, this is O(MN) ... why do we do this? */ 503 while ((p = getprotoent())) { 504 for (tp = protox; tp->pr_name; tp++) 505 if (strcmp(tp->pr_name, p->p_name) == 0) 506 break; 507 if (tp->pr_name == 0 || tp->pr_wanted == 0) 508 continue; 509 printproto(tp, p->p_name); 510 } 511 endprotoent(); 512 } 513 #ifdef INET6 514 if (af == AF_INET6 || af == AF_UNSPEC) 515 for (tp = ip6protox; tp->pr_name; tp++) 516 printproto(tp, tp->pr_name); 517 #endif 518 if (af == AF_IPX || af == AF_UNSPEC) 519 for (tp = ipxprotox; tp->pr_name; tp++) 520 printproto(tp, tp->pr_name); 521 if (af == AF_NS || af == AF_UNSPEC) 522 for (tp = nsprotox; tp->pr_name; tp++) 523 printproto(tp, tp->pr_name); 524 if (af == AF_ISO || af == AF_UNSPEC) 525 for (tp = isoprotox; tp->pr_name; tp++) 526 printproto(tp, tp->pr_name); 527 if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag) 528 unixpr(nl[N_UNIXSW].n_value); 529 if (af == AF_APPLETALK || af == AF_UNSPEC) 530 for (tp = atalkprotox; tp->pr_name; tp++) 531 printproto(tp, tp->pr_name); 532 exit(0); 533 } 534 535 /* 536 * Print out protocol statistics or control blocks (per sflag). 537 * If the interface was not specifically requested, and the symbol 538 * is not in the namelist, ignore this one. 539 */ 540 static void 541 printproto(tp, name) 542 register struct protox *tp; 543 char *name; 544 { 545 void (*pr)(); 546 u_long off; 547 548 if (sflag) { 549 pr = tp->pr_stats; 550 off = nl[tp->pr_sindex].n_value; 551 } else { 552 pr = tp->pr_cblocks; 553 off = nl[tp->pr_index].n_value; 554 } 555 if (pr != NULL && (off || af != AF_UNSPEC)) 556 (*pr)(off, name); 557 } 558 559 /* 560 * Read kernel memory, return 0 on success. 561 */ 562 int 563 kread(addr, buf, size) 564 u_long addr; 565 char *buf; 566 int size; 567 { 568 569 if (kvm_read(kvmd, addr, buf, size) != size) { 570 (void)fprintf(stderr, "%s: %s\n", __progname, 571 kvm_geterr(kvmd)); 572 return (-1); 573 } 574 return (0); 575 } 576 577 char * 578 plural(n) 579 int n; 580 { 581 return (n != 1 ? "s" : ""); 582 } 583 584 char * 585 plurales(n) 586 int n; 587 { 588 return (n != 1 ? "es" : ""); 589 } 590 591 /* 592 * Find the protox for the given "well-known" name. 593 */ 594 static struct protox * 595 knownname(name) 596 char *name; 597 { 598 struct protox **tpp, *tp; 599 600 for (tpp = protoprotox; *tpp; tpp++) 601 for (tp = *tpp; tp->pr_name; tp++) 602 if (strcmp(tp->pr_name, name) == 0) 603 return (tp); 604 return (NULL); 605 } 606 607 /* 608 * Find the protox corresponding to name. 609 */ 610 static struct protox * 611 name2protox(name) 612 char *name; 613 { 614 struct protox *tp; 615 char **alias; /* alias from p->aliases */ 616 struct protoent *p; 617 618 /* 619 * Try to find the name in the list of "well-known" names. If that 620 * fails, check if name is an alias for an Internet protocol. 621 */ 622 if ((tp = knownname(name))) 623 return (tp); 624 625 setprotoent(1); /* make protocol lookup cheaper */ 626 while ((p = getprotoent())) { 627 /* assert: name not same as p->name */ 628 for (alias = p->p_aliases; *alias; alias++) 629 if (strcmp(name, *alias) == 0) { 630 endprotoent(); 631 return (knownname(p->p_name)); 632 } 633 } 634 endprotoent(); 635 return (NULL); 636 } 637 638 static void 639 usage() 640 { 641 (void)fprintf(stderr, 642 "usage: %s [-Aan] [-f address_family] [-M core] [-N system]\n", __progname); 643 (void)fprintf(stderr, 644 " %s [-gimnrs] [-f address_family] [-M core] [-N system]\n", __progname); 645 (void)fprintf(stderr, 646 " %s [-n] [-I interface] [-M core] [-N system] [-w wait]\n", __progname); 647 (void)fprintf(stderr, 648 " %s [-M core] [-N system] [-p protocol]\n", __progname); 649 exit(1); 650 } 651