main.c revision 1.15
1 /* $NetBSD: main.c,v 1.15 1998/07/06 07:50:19 mrg Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1988, 1993 5 * Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1983, 1988, 1993\n\ 39 Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "from: @(#)main.c 8.4 (Berkeley) 3/1/94"; 45 #else 46 __RCSID("$NetBSD: main.c,v 1.15 1998/07/06 07:50:19 mrg Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 #include <sys/param.h> 51 #include <sys/file.h> 52 #include <sys/protosw.h> 53 #include <sys/socket.h> 54 55 #include <netinet/in.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 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_MSIZE 32 137 { "_msize" }, 138 #define N_MCLBYTES 33 139 { "_mclbytes" }, 140 #define N_DDPSTAT 34 141 { "_ddpstat"}, 142 #define N_DDPCB 35 143 { "_ddpcb"}, 144 { "" }, 145 }; 146 147 struct protox { 148 u_char pr_index; /* index into nlist of cb head */ 149 u_char pr_sindex; /* index into nlist of stat block */ 150 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 151 void (*pr_cblocks) /* control blocks printing routine */ 152 __P((u_long, char *)); 153 void (*pr_stats) /* statistics printing routine */ 154 __P((u_long, char *)); 155 void (*pr_dump) /* PCB state dump routine */ 156 __P((u_long)); 157 char *pr_name; /* well-known name */ 158 } protox[] = { 159 { N_TCBTABLE, N_TCPSTAT, 1, protopr, 160 tcp_stats, tcp_dump, "tcp" }, 161 { N_UDBTABLE, N_UDPSTAT, 1, protopr, 162 udp_stats, 0, "udp" }, 163 { -1, N_IPSTAT, 1, 0, 164 ip_stats, 0, "ip" }, 165 { -1, N_ICMPSTAT, 1, 0, 166 icmp_stats, 0, "icmp" }, 167 { -1, N_IGMPSTAT, 1, 0, 168 igmp_stats, 0, "igmp" }, 169 { -1, -1, 0, 0, 170 0, 0, 0 } 171 }; 172 173 struct protox atalkprotox[] = { 174 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, 175 ddp_stats, 0, "ddp" }, 176 { -1, -1, 0, 0, 177 0, 0 } 178 }; 179 180 struct protox nsprotox[] = { 181 { N_IDP, N_IDPSTAT, 1, nsprotopr, 182 idp_stats, 0, "idp" }, 183 { N_IDP, N_SPPSTAT, 1, nsprotopr, 184 spp_stats, 0, "spp" }, 185 { -1, N_NSERR, 1, 0, 186 nserr_stats, 0, "ns_err" }, 187 { -1, -1, 0, 0, 188 0, 0 } 189 }; 190 191 struct protox isoprotox[] = { 192 { ISO_TP, N_TPSTAT, 1, iso_protopr, 193 tp_stats, 0, "tp" }, 194 { N_CLTP, N_CLTPSTAT, 1, iso_protopr, 195 cltp_stats, 0, "cltp" }, 196 { -1, N_CLNPSTAT, 1, 0, 197 clnp_stats, 0, "clnp"}, 198 { -1, N_ESISSTAT, 1, 0, 199 esis_stats, 0, "esis"}, 200 { -1, -1, 0, 0, 201 0, 0, 0 } 202 }; 203 204 struct protox *protoprotox[] = { protox, atalkprotox, 205 nsprotox, isoprotox, NULL }; 206 207 int main __P((int, char *[])); 208 static void printproto __P((struct protox *, char *)); 209 static void usage __P((void)); 210 static struct protox *name2protox __P((char *)); 211 static struct protox *knownname __P((char *)); 212 213 214 kvm_t *kvmd; 215 216 int 217 main(argc, argv) 218 int argc; 219 char *argv[]; 220 { 221 extern char *optarg; 222 extern int optind; 223 struct protoent *p; 224 struct protox *tp; /* for printing cblocks & stats */ 225 int ch; 226 char *nlistf = NULL, *memf = NULL; 227 char buf[_POSIX2_LINE_MAX], *cp; 228 u_long pcbaddr; 229 gid_t egid = getegid(); 230 231 (void)setegid(getgid()); 232 tp = NULL; 233 af = AF_UNSPEC; 234 pcbaddr = 0; 235 236 while ((ch = getopt(argc, argv, "Aabdf:ghI:iM:mN:nP:p:rstuw:")) != -1) 237 switch(ch) { 238 case 'A': 239 Aflag = 1; 240 break; 241 case 'a': 242 aflag = 1; 243 break; 244 case 'b': 245 bflag = 1; 246 break; 247 case 'd': 248 dflag = 1; 249 break; 250 case 'f': 251 if (strcmp(optarg, "ns") == 0) 252 af = AF_NS; 253 else if (strcmp(optarg, "inet") == 0) 254 af = AF_INET; 255 else if (strcmp(optarg, "unix") == 0) 256 af = AF_UNIX; 257 else if (strcmp(optarg, "iso") == 0) 258 af = AF_ISO; 259 else if (strcmp(optarg, "atalk") == 0) 260 af = AF_APPLETALK; 261 else { 262 (void)fprintf(stderr, 263 "%s: %s: unknown address family\n", 264 __progname, optarg); 265 exit(1); 266 } 267 break; 268 case 'g': 269 gflag = 1; 270 break; 271 case 'I': 272 iflag = 1; 273 interface = optarg; 274 break; 275 case 'i': 276 iflag = 1; 277 break; 278 case 'M': 279 memf = optarg; 280 break; 281 case 'm': 282 mflag = 1; 283 break; 284 case 'N': 285 nlistf = optarg; 286 break; 287 case 'n': 288 nflag = 1; 289 break; 290 case 'P': 291 pcbaddr = strtoul(optarg, &cp, 16); 292 if (*cp != '\0' || errno == ERANGE) { 293 (void)fprintf(stderr, 294 "%s: invalid PCB address %s\n", 295 __progname, optarg); 296 exit(1); 297 } 298 Pflag = 1; 299 break; 300 case 'p': 301 if ((tp = name2protox(optarg)) == NULL) { 302 (void)fprintf(stderr, 303 "%s: %s: unknown or uninstrumented protocol\n", 304 __progname, optarg); 305 exit(1); 306 } 307 pflag = 1; 308 break; 309 case 'r': 310 rflag = 1; 311 break; 312 case 's': 313 ++sflag; 314 break; 315 case 't': 316 tflag = 1; 317 break; 318 case 'u': 319 af = AF_UNIX; 320 break; 321 case 'w': 322 interval = atoi(optarg); 323 iflag = 1; 324 break; 325 case '?': 326 default: 327 usage(); 328 } 329 argv += optind; 330 argc -= optind; 331 332 #define BACKWARD_COMPATIBILITY 333 #ifdef BACKWARD_COMPATIBILITY 334 if (*argv) { 335 if (isdigit(**argv)) { 336 interval = atoi(*argv); 337 if (interval <= 0) 338 usage(); 339 ++argv; 340 iflag = 1; 341 } 342 if (*argv) { 343 nlistf = *argv; 344 if (*++argv) 345 memf = *argv; 346 } 347 } 348 #endif 349 350 /* 351 * Discard setgid privileges. If not the running kernel, we toss 352 * them away totally so that bad guys can't print interesting stuff 353 * from kernel memory, otherwise switch back to kmem for the 354 * duration of the kvm_openfiles() call. 355 */ 356 if (nlistf != NULL || memf != NULL) 357 (void)setgid(getgid()); 358 else 359 (void)setegid(egid); 360 361 if ((kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, 362 buf)) == NULL) 363 errx(1, "%s", buf); 364 365 if (nlistf == NULL && memf == NULL) 366 (void)setgid(getgid()); 367 368 if (kvm_nlist(kvmd, nl) < 0 || nl[0].n_type == 0) { 369 if (nlistf) 370 fprintf(stderr, "%s: %s: no namelist\n", __progname, 371 nlistf); 372 else 373 fprintf(stderr, "%s: no namelist\n", __progname); 374 exit(1); 375 } 376 if (mflag) { 377 mbpr(nl[N_MBSTAT].n_value, nl[N_MSIZE].n_value, 378 nl[N_MCLBYTES].n_value); 379 exit(0); 380 } 381 if (Pflag) { 382 if (tp == NULL) { 383 /* Default to TCP. */ 384 tp = name2protox("tcp"); 385 } 386 if (tp->pr_dump) 387 (*tp->pr_dump)(pcbaddr); 388 else 389 printf("%s: no PCB dump routine\n", tp->pr_name); 390 exit(0); 391 } 392 if (pflag) { 393 if (tp->pr_stats) 394 (*tp->pr_stats)(nl[tp->pr_sindex].n_value, 395 tp->pr_name); 396 else 397 printf("%s: no stats routine\n", tp->pr_name); 398 exit(0); 399 } 400 /* 401 * Keep file descriptors open to avoid overhead 402 * of open/close on each call to get* routines. 403 */ 404 sethostent(1); 405 setnetent(1); 406 if (iflag) { 407 intpr(interval, nl[N_IFNET].n_value); 408 exit(0); 409 } 410 if (rflag) { 411 if (sflag) 412 rt_stats(nl[N_RTSTAT].n_value); 413 else 414 routepr(nl[N_RTREE].n_value); 415 exit(0); 416 } 417 if (gflag) { 418 if (sflag) 419 mrt_stats(nl[N_MRTPROTO].n_value, 420 nl[N_MRTSTAT].n_value); 421 else 422 mroutepr(nl[N_MRTPROTO].n_value, 423 nl[N_MFCHASHTBL].n_value, 424 nl[N_MFCHASH].n_value, 425 nl[N_VIFTABLE].n_value); 426 exit(0); 427 } 428 if (af == AF_INET || af == AF_UNSPEC) { 429 setprotoent(1); 430 setservent(1); 431 /* ugh, this is O(MN) ... why do we do this? */ 432 while ((p = getprotoent()) != NULL) { 433 for (tp = protox; tp->pr_name; tp++) 434 if (strcmp(tp->pr_name, p->p_name) == 0) 435 break; 436 if (tp->pr_name == 0 || tp->pr_wanted == 0) 437 continue; 438 printproto(tp, p->p_name); 439 } 440 endprotoent(); 441 } 442 if (af == AF_APPLETALK || af == AF_UNSPEC) 443 for (tp = atalkprotox; tp->pr_name; tp++) 444 printproto(tp, tp->pr_name); 445 if (af == AF_NS || af == AF_UNSPEC) 446 for (tp = nsprotox; tp->pr_name; tp++) 447 printproto(tp, tp->pr_name); 448 if (af == AF_ISO || af == AF_UNSPEC) 449 for (tp = isoprotox; tp->pr_name; tp++) 450 printproto(tp, tp->pr_name); 451 if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag) 452 unixpr(nl[N_UNIXSW].n_value); 453 exit(0); 454 } 455 456 /* 457 * Print out protocol statistics or control blocks (per sflag). 458 * If the interface was not specifically requested, and the symbol 459 * is not in the namelist, ignore this one. 460 */ 461 static void 462 printproto(tp, name) 463 struct protox *tp; 464 char *name; 465 { 466 void (*pr) __P((u_long, char *)); 467 u_long off; 468 469 if (sflag) { 470 pr = tp->pr_stats; 471 off = nl[tp->pr_sindex].n_value; 472 } else { 473 pr = tp->pr_cblocks; 474 off = nl[tp->pr_index].n_value; 475 } 476 if (pr != NULL && (off || af != AF_UNSPEC)) 477 (*pr)(off, name); 478 } 479 480 /* 481 * Read kernel memory, return 0 on success. 482 */ 483 int 484 kread(addr, buf, size) 485 u_long addr; 486 char *buf; 487 int size; 488 { 489 490 if (kvm_read(kvmd, addr, buf, size) != size) { 491 (void)fprintf(stderr, "%s: %s\n", __progname, 492 kvm_geterr(kvmd)); 493 return (-1); 494 } 495 return (0); 496 } 497 498 char * 499 plural(n) 500 int n; 501 { 502 return (n != 1 ? "s" : ""); 503 } 504 505 char * 506 plurales(n) 507 int n; 508 { 509 return (n != 1 ? "es" : ""); 510 } 511 512 /* 513 * Find the protox for the given "well-known" name. 514 */ 515 static struct protox * 516 knownname(name) 517 char *name; 518 { 519 struct protox **tpp, *tp; 520 521 for (tpp = protoprotox; *tpp; tpp++) 522 for (tp = *tpp; tp->pr_name; tp++) 523 if (strcmp(tp->pr_name, name) == 0) 524 return (tp); 525 return (NULL); 526 } 527 528 /* 529 * Find the protox corresponding to name. 530 */ 531 static struct protox * 532 name2protox(name) 533 char *name; 534 { 535 struct protox *tp; 536 char **alias; /* alias from p->aliases */ 537 struct protoent *p; 538 539 /* 540 * Try to find the name in the list of "well-known" names. If that 541 * fails, check if name is an alias for an Internet protocol. 542 */ 543 if ((tp = knownname(name)) != NULL) 544 return (tp); 545 546 setprotoent(1); /* make protocol lookup cheaper */ 547 while ((p = getprotoent()) != NULL) { 548 /* assert: name not same as p->name */ 549 for (alias = p->p_aliases; *alias; alias++) 550 if (strcmp(name, *alias) == 0) { 551 endprotoent(); 552 return (knownname(p->p_name)); 553 } 554 } 555 endprotoent(); 556 return (NULL); 557 } 558 559 static void 560 usage() 561 { 562 (void)fprintf(stderr, 563 "usage: %s [-Aan] [-f address_family] [-M core] [-N system]\n", __progname); 564 (void)fprintf(stderr, 565 " %s [-ghimnrs] [-f address_family] [-M core] [-N system]\n", __progname); 566 (void)fprintf(stderr, 567 " %s [-n] [-I interface] [-M core] [-N system] [-w wait]\n", __progname); 568 (void)fprintf(stderr, 569 " %s [-M core] [-N system] [-p protocol]\n", __progname); 570 (void)fprintf(stderr, 571 " %s [-M core] [-N system] [-p protocol] -P pcbaddr\n", __progname); 572 exit(1); 573 } 574
Indexes created Thu Sep 25 02:09:54 GMT 2025