main.c revision 1.10
1 /* $NetBSD: main.c,v 1.10 1997/02/28 00:14:21 jonathan 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 #ifndef lint 37 char copyright[] = 38 "@(#) 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 static char *rcsid = "$NetBSD: main.c,v 1.10 1997/02/28 00:14:21 jonathan 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 <errno.h> 59 #include <kvm.h> 60 #include <limits.h> 61 #include <netdb.h> 62 #include <nlist.h> 63 #include <paths.h> 64 #include <stdio.h> 65 #include <stdlib.h> 66 #include <string.h> 67 #include <unistd.h> 68 #include "netstat.h" 69 70 struct nlist nl[] = { 71 #define N_MBSTAT 0 72 { "_mbstat" }, 73 #define N_IPSTAT 1 74 { "_ipstat" }, 75 #define N_TCBTABLE 2 76 { "_tcbtable" }, 77 #define N_TCPSTAT 3 78 { "_tcpstat" }, 79 #define N_UDBTABLE 4 80 { "_udbtable" }, 81 #define N_UDPSTAT 5 82 { "_udpstat" }, 83 #define N_IFNET 6 84 { "_ifnet" }, 85 #define N_IMP 7 86 { "_imp_softc" }, 87 #define N_ICMPSTAT 8 88 { "_icmpstat" }, 89 #define N_RTSTAT 9 90 { "_rtstat" }, 91 #define N_UNIXSW 10 92 { "_unixsw" }, 93 #define N_IDP 11 94 { "_nspcb"}, 95 #define N_IDPSTAT 12 96 { "_idpstat"}, 97 #define N_SPPSTAT 13 98 { "_spp_istat"}, 99 #define N_NSERR 14 100 { "_ns_errstat"}, 101 #define N_CLNPSTAT 15 102 { "_clnp_stat"}, 103 #define IN_NOTUSED 16 104 { "_tp_inpcb" }, 105 #define ISO_TP 17 106 { "_tp_refinfo" }, 107 #define N_TPSTAT 18 108 { "_tp_stat" }, 109 #define N_ESISSTAT 19 110 { "_esis_stat"}, 111 #define N_NIMP 20 112 { "_nimp"}, 113 #define N_RTREE 21 114 { "_rt_tables"}, 115 #define N_CLTP 22 116 { "_cltb"}, 117 #define N_CLTPSTAT 23 118 { "_cltpstat"}, 119 #define N_NFILE 24 120 { "_nfile" }, 121 #define N_FILE 25 122 { "_file" }, 123 #define N_IGMPSTAT 26 124 { "_igmpstat" }, 125 #define N_MRTPROTO 27 126 { "_ip_mrtproto" }, 127 #define N_MRTSTAT 28 128 { "_mrtstat" }, 129 #define N_MFCHASHTBL 29 130 { "_mfchashtbl" }, 131 #define N_MFCHASH 30 132 { "_mfchash" }, 133 #define N_VIFTABLE 31 134 { "_viftable" }, 135 #define N_MSIZE 32 136 { "_msize" }, 137 #define N_MCLBYTES 33 138 { "_mclbytes" }, 139 "", 140 }; 141 142 struct protox { 143 u_char pr_index; /* index into nlist of cb head */ 144 u_char pr_sindex; /* index into nlist of stat block */ 145 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 146 void (*pr_cblocks)(); /* control blocks printing routine */ 147 void (*pr_stats)(); /* statistics printing routine */ 148 char *pr_name; /* well-known name */ 149 } protox[] = { 150 { N_TCBTABLE, N_TCPSTAT, 1, protopr, 151 tcp_stats, "tcp" }, 152 { N_UDBTABLE, N_UDPSTAT, 1, protopr, 153 udp_stats, "udp" }, 154 { -1, N_IPSTAT, 1, 0, 155 ip_stats, "ip" }, 156 { -1, N_ICMPSTAT, 1, 0, 157 icmp_stats, "icmp" }, 158 { -1, N_IGMPSTAT, 1, 0, 159 igmp_stats, "igmp" }, 160 { -1, -1, 0, 0, 161 0, 0 } 162 }; 163 164 struct protox nsprotox[] = { 165 { N_IDP, N_IDPSTAT, 1, nsprotopr, 166 idp_stats, "idp" }, 167 { N_IDP, N_SPPSTAT, 1, nsprotopr, 168 spp_stats, "spp" }, 169 { -1, N_NSERR, 1, 0, 170 nserr_stats, "ns_err" }, 171 { -1, -1, 0, 0, 172 0, 0 } 173 }; 174 175 struct protox isoprotox[] = { 176 { ISO_TP, N_TPSTAT, 1, iso_protopr, 177 tp_stats, "tp" }, 178 { N_CLTP, N_CLTPSTAT, 1, iso_protopr, 179 cltp_stats, "cltp" }, 180 { -1, N_CLNPSTAT, 1, 0, 181 clnp_stats, "clnp"}, 182 { -1, N_ESISSTAT, 1, 0, 183 esis_stats, "esis"}, 184 { -1, -1, 0, 0, 185 0, 0 } 186 }; 187 188 struct protox *protoprotox[] = { protox, nsprotox, isoprotox, NULL }; 189 190 static void printproto __P((struct protox *, char *)); 191 static void usage __P((void)); 192 static struct protox *name2protox __P((char *)); 193 static struct protox *knownname __P((char *)); 194 195 kvm_t *kvmd; 196 197 int 198 main(argc, argv) 199 int argc; 200 char *argv[]; 201 { 202 extern char *optarg; 203 extern int optind; 204 register struct protoent *p; 205 register struct protox *tp; /* for printing cblocks & stats */ 206 register char *cp; 207 int ch; 208 char *nlistf = NULL, *memf = NULL; 209 char buf[_POSIX2_LINE_MAX]; 210 211 af = AF_UNSPEC; 212 213 while ((ch = getopt(argc, argv, "Aadf:ghI:iM:mN:np:rstuw:")) != EOF) 214 switch(ch) { 215 case 'A': 216 Aflag = 1; 217 break; 218 case 'a': 219 aflag = 1; 220 break; 221 case 'd': 222 dflag = 1; 223 break; 224 case 'f': 225 if (strcmp(optarg, "ns") == 0) 226 af = AF_NS; 227 else if (strcmp(optarg, "inet") == 0) 228 af = AF_INET; 229 else if (strcmp(optarg, "unix") == 0) 230 af = AF_UNIX; 231 else if (strcmp(optarg, "iso") == 0) 232 af = AF_ISO; 233 else { 234 (void)fprintf(stderr, 235 "%s: %s: unknown address family\n", 236 __progname, optarg); 237 exit(1); 238 } 239 break; 240 case 'g': 241 gflag = 1; 242 break; 243 case 'I': 244 iflag = 1; 245 interface = optarg; 246 break; 247 case 'i': 248 iflag = 1; 249 break; 250 case 'M': 251 memf = optarg; 252 break; 253 case 'm': 254 mflag = 1; 255 break; 256 case 'N': 257 nlistf = optarg; 258 break; 259 case 'n': 260 nflag = 1; 261 break; 262 case 'p': 263 if ((tp = name2protox(optarg)) == NULL) { 264 (void)fprintf(stderr, 265 "%s: %s: unknown or uninstrumented protocol\n", 266 __progname, optarg); 267 exit(1); 268 } 269 pflag = 1; 270 break; 271 case 'r': 272 rflag = 1; 273 break; 274 case 's': 275 ++sflag; 276 break; 277 case 't': 278 tflag = 1; 279 break; 280 case 'u': 281 af = AF_UNIX; 282 break; 283 case 'w': 284 interval = atoi(optarg); 285 iflag = 1; 286 break; 287 case '?': 288 default: 289 usage(); 290 } 291 argv += optind; 292 argc -= optind; 293 294 #define BACKWARD_COMPATIBILITY 295 #ifdef BACKWARD_COMPATIBILITY 296 if (*argv) { 297 if (isdigit(**argv)) { 298 interval = atoi(*argv); 299 if (interval <= 0) 300 usage(); 301 ++argv; 302 iflag = 1; 303 } 304 if (*argv) { 305 nlistf = *argv; 306 if (*++argv) 307 memf = *argv; 308 } 309 } 310 #endif 311 312 /* 313 * Discard setgid privileges if not the running kernel so that bad 314 * guys can't print interesting stuff from kernel memory. 315 */ 316 if (nlistf != NULL || memf != NULL) 317 setgid(getgid()); 318 319 if ((kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, 320 buf)) == NULL) { 321 fprintf(stderr, "%s: kvm_open: %s\n", __progname, buf); 322 exit(1); 323 } 324 if (kvm_nlist(kvmd, nl) < 0 || nl[0].n_type == 0) { 325 if (nlistf) 326 fprintf(stderr, "%s: %s: no namelist\n", __progname, 327 nlistf); 328 else 329 fprintf(stderr, "%s: no namelist\n", __progname); 330 exit(1); 331 } 332 if (mflag) { 333 mbpr(nl[N_MBSTAT].n_value, nl[N_MSIZE].n_value, 334 nl[N_MCLBYTES].n_value); 335 exit(0); 336 } 337 if (pflag) { 338 if (tp->pr_stats) 339 (*tp->pr_stats)(nl[tp->pr_sindex].n_value, 340 tp->pr_name); 341 else 342 printf("%s: no stats routine\n", tp->pr_name); 343 exit(0); 344 } 345 /* 346 * Keep file descriptors open to avoid overhead 347 * of open/close on each call to get* routines. 348 */ 349 sethostent(1); 350 setnetent(1); 351 if (iflag) { 352 intpr(interval, nl[N_IFNET].n_value); 353 exit(0); 354 } 355 if (rflag) { 356 if (sflag) 357 rt_stats(nl[N_RTSTAT].n_value); 358 else 359 routepr(nl[N_RTREE].n_value); 360 exit(0); 361 } 362 if (gflag) { 363 if (sflag) 364 mrt_stats(nl[N_MRTPROTO].n_value, 365 nl[N_MRTSTAT].n_value); 366 else 367 mroutepr(nl[N_MRTPROTO].n_value, 368 nl[N_MFCHASHTBL].n_value, 369 nl[N_MFCHASH].n_value, 370 nl[N_VIFTABLE].n_value); 371 exit(0); 372 } 373 if (af == AF_INET || af == AF_UNSPEC) { 374 setprotoent(1); 375 setservent(1); 376 /* ugh, this is O(MN) ... why do we do this? */ 377 while (p = getprotoent()) { 378 for (tp = protox; tp->pr_name; tp++) 379 if (strcmp(tp->pr_name, p->p_name) == 0) 380 break; 381 if (tp->pr_name == 0 || tp->pr_wanted == 0) 382 continue; 383 printproto(tp, p->p_name); 384 } 385 endprotoent(); 386 } 387 if (af == AF_NS || af == AF_UNSPEC) 388 for (tp = nsprotox; tp->pr_name; tp++) 389 printproto(tp, tp->pr_name); 390 if (af == AF_ISO || af == AF_UNSPEC) 391 for (tp = isoprotox; tp->pr_name; tp++) 392 printproto(tp, tp->pr_name); 393 if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag) 394 unixpr(nl[N_UNIXSW].n_value); 395 exit(0); 396 } 397 398 /* 399 * Print out protocol statistics or control blocks (per sflag). 400 * If the interface was not specifically requested, and the symbol 401 * is not in the namelist, ignore this one. 402 */ 403 static void 404 printproto(tp, name) 405 register struct protox *tp; 406 char *name; 407 { 408 void (*pr)(); 409 u_long off; 410 411 if (sflag) { 412 pr = tp->pr_stats; 413 off = nl[tp->pr_sindex].n_value; 414 } else { 415 pr = tp->pr_cblocks; 416 off = nl[tp->pr_index].n_value; 417 } 418 if (pr != NULL && (off || af != AF_UNSPEC)) 419 (*pr)(off, name); 420 } 421 422 /* 423 * Read kernel memory, return 0 on success. 424 */ 425 int 426 kread(addr, buf, size) 427 u_long addr; 428 char *buf; 429 int size; 430 { 431 432 if (kvm_read(kvmd, addr, buf, size) != size) { 433 (void)fprintf(stderr, "%s: %s\n", __progname, 434 kvm_geterr(kvmd)); 435 return (-1); 436 } 437 return (0); 438 } 439 440 char * 441 plural(n) 442 int n; 443 { 444 return (n != 1 ? "s" : ""); 445 } 446 447 char * 448 plurales(n) 449 int n; 450 { 451 return (n != 1 ? "es" : ""); 452 } 453 454 /* 455 * Find the protox for the given "well-known" name. 456 */ 457 static struct protox * 458 knownname(name) 459 char *name; 460 { 461 struct protox **tpp, *tp; 462 463 for (tpp = protoprotox; *tpp; tpp++) 464 for (tp = *tpp; tp->pr_name; tp++) 465 if (strcmp(tp->pr_name, name) == 0) 466 return (tp); 467 return (NULL); 468 } 469 470 /* 471 * Find the protox corresponding to name. 472 */ 473 static struct protox * 474 name2protox(name) 475 char *name; 476 { 477 struct protox *tp; 478 char **alias; /* alias from p->aliases */ 479 struct protoent *p; 480 481 /* 482 * Try to find the name in the list of "well-known" names. If that 483 * fails, check if name is an alias for an Internet protocol. 484 */ 485 if (tp = knownname(name)) 486 return (tp); 487 488 setprotoent(1); /* make protocol lookup cheaper */ 489 while (p = getprotoent()) { 490 /* assert: name not same as p->name */ 491 for (alias = p->p_aliases; *alias; alias++) 492 if (strcmp(name, *alias) == 0) { 493 endprotoent(); 494 return (knownname(p->p_name)); 495 } 496 } 497 endprotoent(); 498 return (NULL); 499 } 500 501 static void 502 usage() 503 { 504 (void)fprintf(stderr, 505 "usage: %s [-Aan] [-f address_family] [-M core] [-N system]\n", __progname); 506 (void)fprintf(stderr, 507 " %s [-ghimnrs] [-f address_family] [-M core] [-N system]\n", __progname); 508 (void)fprintf(stderr, 509 " %s [-n] [-I interface] [-M core] [-N system] [-w wait]\n", __progname); 510 (void)fprintf(stderr, 511 " %s [-M core] [-N system] [-p protocol]\n", __progname); 512 exit(1); 513 } 514
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