main.c revision 1.7
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 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 /*static char sccsid[] = "from: @(#)main.c 8.4 (Berkeley) 3/1/94";*/ 42 static char *rcsid = "$Id: main.c,v 1.7 1995/06/12 03:03:11 mycroft Exp $"; 43 #endif /* not lint */ 44 45 #include <sys/param.h> 46 #include <sys/file.h> 47 #include <sys/protosw.h> 48 #include <sys/socket.h> 49 50 #include <netinet/in.h> 51 52 #include <ctype.h> 53 #include <errno.h> 54 #include <kvm.h> 55 #include <limits.h> 56 #include <netdb.h> 57 #include <nlist.h> 58 #include <paths.h> 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include <unistd.h> 63 #include "netstat.h" 64 65 struct nlist nl[] = { 66 #define N_MBSTAT 0 67 { "_mbstat" }, 68 #define N_IPSTAT 1 69 { "_ipstat" }, 70 #define N_TCBTABLE 2 71 { "_tcbtable" }, 72 #define N_TCPSTAT 3 73 { "_tcpstat" }, 74 #define N_UDBTABLE 4 75 { "_udbtable" }, 76 #define N_UDPSTAT 5 77 { "_udpstat" }, 78 #define N_IFNET 6 79 { "_ifnet" }, 80 #define N_IMP 7 81 { "_imp_softc" }, 82 #define N_ICMPSTAT 8 83 { "_icmpstat" }, 84 #define N_RTSTAT 9 85 { "_rtstat" }, 86 #define N_UNIXSW 10 87 { "_unixsw" }, 88 #define N_IDP 11 89 { "_nspcb"}, 90 #define N_IDPSTAT 12 91 { "_idpstat"}, 92 #define N_SPPSTAT 13 93 { "_spp_istat"}, 94 #define N_NSERR 14 95 { "_ns_errstat"}, 96 #define N_CLNPSTAT 15 97 { "_clnp_stat"}, 98 #define IN_NOTUSED 16 99 { "_tp_inpcb" }, 100 #define ISO_TP 17 101 { "_tp_refinfo" }, 102 #define N_TPSTAT 18 103 { "_tp_stat" }, 104 #define N_ESISSTAT 19 105 { "_esis_stat"}, 106 #define N_NIMP 20 107 { "_nimp"}, 108 #define N_RTREE 21 109 { "_rt_tables"}, 110 #define N_CLTP 22 111 { "_cltb"}, 112 #define N_CLTPSTAT 23 113 { "_cltpstat"}, 114 #define N_NFILE 24 115 { "_nfile" }, 116 #define N_FILE 25 117 { "_file" }, 118 #define N_IGMPSTAT 26 119 { "_igmpstat" }, 120 #define N_MRTPROTO 27 121 { "_ip_mrtproto" }, 122 #define N_MRTSTAT 28 123 { "_mrtstat" }, 124 #define N_MFCHASHTBL 29 125 { "_mfchashtbl" }, 126 #define N_MFCHASH 30 127 { "_mfchash" }, 128 #define N_VIFTABLE 31 129 { "_viftable" }, 130 "", 131 }; 132 133 struct protox { 134 u_char pr_index; /* index into nlist of cb head */ 135 u_char pr_sindex; /* index into nlist of stat block */ 136 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 137 void (*pr_cblocks)(); /* control blocks printing routine */ 138 void (*pr_stats)(); /* statistics printing routine */ 139 char *pr_name; /* well-known name */ 140 } protox[] = { 141 { N_TCBTABLE, N_TCPSTAT, 1, protopr, 142 tcp_stats, "tcp" }, 143 { N_UDBTABLE, N_UDPSTAT, 1, protopr, 144 udp_stats, "udp" }, 145 { -1, N_IPSTAT, 1, 0, 146 ip_stats, "ip" }, 147 { -1, N_ICMPSTAT, 1, 0, 148 icmp_stats, "icmp" }, 149 { -1, N_IGMPSTAT, 1, 0, 150 igmp_stats, "igmp" }, 151 { -1, -1, 0, 0, 152 0, 0 } 153 }; 154 155 struct protox nsprotox[] = { 156 { N_IDP, N_IDPSTAT, 1, nsprotopr, 157 idp_stats, "idp" }, 158 { N_IDP, N_SPPSTAT, 1, nsprotopr, 159 spp_stats, "spp" }, 160 { -1, N_NSERR, 1, 0, 161 nserr_stats, "ns_err" }, 162 { -1, -1, 0, 0, 163 0, 0 } 164 }; 165 166 struct protox isoprotox[] = { 167 { ISO_TP, N_TPSTAT, 1, iso_protopr, 168 tp_stats, "tp" }, 169 { N_CLTP, N_CLTPSTAT, 1, iso_protopr, 170 cltp_stats, "cltp" }, 171 { -1, N_CLNPSTAT, 1, 0, 172 clnp_stats, "clnp"}, 173 { -1, N_ESISSTAT, 1, 0, 174 esis_stats, "esis"}, 175 { -1, -1, 0, 0, 176 0, 0 } 177 }; 178 179 struct protox *protoprotox[] = { protox, nsprotox, isoprotox, NULL }; 180 181 static void printproto __P((struct protox *, char *)); 182 static void usage __P((void)); 183 static struct protox *name2protox __P((char *)); 184 static struct protox *knownname __P((char *)); 185 186 kvm_t *kvmd; 187 188 int 189 main(argc, argv) 190 int argc; 191 char *argv[]; 192 { 193 extern char *optarg; 194 extern int optind; 195 register struct protoent *p; 196 register struct protox *tp; /* for printing cblocks & stats */ 197 register char *cp; 198 int ch; 199 char *nlistf = NULL, *memf = NULL; 200 char buf[_POSIX2_LINE_MAX]; 201 202 if (cp = rindex(argv[0], '/')) 203 prog = cp + 1; 204 else 205 prog = argv[0]; 206 af = AF_UNSPEC; 207 208 while ((ch = getopt(argc, argv, "Aadf:ghI:iM:mN:np:rstuw:")) != EOF) 209 switch(ch) { 210 case 'A': 211 Aflag = 1; 212 break; 213 case 'a': 214 aflag = 1; 215 break; 216 case 'd': 217 dflag = 1; 218 break; 219 case 'f': 220 if (strcmp(optarg, "ns") == 0) 221 af = AF_NS; 222 else if (strcmp(optarg, "inet") == 0) 223 af = AF_INET; 224 else if (strcmp(optarg, "unix") == 0) 225 af = AF_UNIX; 226 else if (strcmp(optarg, "iso") == 0) 227 af = AF_ISO; 228 else { 229 (void)fprintf(stderr, 230 "%s: %s: unknown address family\n", 231 prog, optarg); 232 exit(1); 233 } 234 break; 235 case 'g': 236 gflag = 1; 237 break; 238 case 'I': { 239 char *cp; 240 241 iflag = 1; 242 for (cp = interface = optarg; isalpha(*cp); cp++) 243 continue; 244 unit = atoi(cp); 245 *cp = '\0'; 246 break; 247 } 248 case 'i': 249 iflag = 1; 250 break; 251 case 'M': 252 memf = optarg; 253 break; 254 case 'm': 255 mflag = 1; 256 break; 257 case 'N': 258 nlistf = optarg; 259 break; 260 case 'n': 261 nflag = 1; 262 break; 263 case 'p': 264 if ((tp = name2protox(optarg)) == NULL) { 265 (void)fprintf(stderr, 266 "%s: %s: unknown or uninstrumented protocol\n", 267 prog, optarg); 268 exit(1); 269 } 270 pflag = 1; 271 break; 272 case 'r': 273 rflag = 1; 274 break; 275 case 's': 276 ++sflag; 277 break; 278 case 't': 279 tflag = 1; 280 break; 281 case 'u': 282 af = AF_UNIX; 283 break; 284 case 'w': 285 interval = atoi(optarg); 286 iflag = 1; 287 break; 288 case '?': 289 default: 290 usage(); 291 } 292 argv += optind; 293 argc -= optind; 294 295 #define BACKWARD_COMPATIBILITY 296 #ifdef BACKWARD_COMPATIBILITY 297 if (*argv) { 298 if (isdigit(**argv)) { 299 interval = atoi(*argv); 300 if (interval <= 0) 301 usage(); 302 ++argv; 303 iflag = 1; 304 } 305 if (*argv) { 306 nlistf = *argv; 307 if (*++argv) 308 memf = *argv; 309 } 310 } 311 #endif 312 313 /* 314 * Discard setgid privileges if not the running kernel so that bad 315 * guys can't print interesting stuff from kernel memory. 316 */ 317 if (nlistf != NULL || memf != NULL) 318 setgid(getgid()); 319 320 if ((kvmd = kvm_open(nlistf, memf, NULL, O_RDONLY, prog)) == NULL) { 321 fprintf(stderr, "%s: kvm_open: %s\n", prog, 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", prog, nlistf); 327 else 328 fprintf(stderr, "%s: no namelist\n", prog); 329 exit(1); 330 } 331 if (mflag) { 332 mbpr(nl[N_MBSTAT].n_value); 333 exit(0); 334 } 335 if (pflag) { 336 if (tp->pr_stats) 337 (*tp->pr_stats)(nl[tp->pr_sindex].n_value, 338 tp->pr_name); 339 else 340 printf("%s: no stats routine\n", tp->pr_name); 341 exit(0); 342 } 343 /* 344 * Keep file descriptors open to avoid overhead 345 * of open/close on each call to get* routines. 346 */ 347 sethostent(1); 348 setnetent(1); 349 if (iflag) { 350 intpr(interval, nl[N_IFNET].n_value); 351 exit(0); 352 } 353 if (rflag) { 354 if (sflag) 355 rt_stats(nl[N_RTSTAT].n_value); 356 else 357 routepr(nl[N_RTREE].n_value); 358 exit(0); 359 } 360 if (gflag) { 361 if (sflag) 362 mrt_stats(nl[N_MRTPROTO].n_value, 363 nl[N_MRTSTAT].n_value); 364 else 365 mroutepr(nl[N_MRTPROTO].n_value, 366 nl[N_MFCHASHTBL].n_value, 367 nl[N_MFCHASH].n_value, 368 nl[N_VIFTABLE].n_value); 369 exit(0); 370 } 371 if (af == AF_INET || af == AF_UNSPEC) { 372 setprotoent(1); 373 setservent(1); 374 /* ugh, this is O(MN) ... why do we do this? */ 375 while (p = getprotoent()) { 376 for (tp = protox; tp->pr_name; tp++) 377 if (strcmp(tp->pr_name, p->p_name) == 0) 378 break; 379 if (tp->pr_name == 0 || tp->pr_wanted == 0) 380 continue; 381 printproto(tp, p->p_name); 382 } 383 endprotoent(); 384 } 385 if (af == AF_NS || af == AF_UNSPEC) 386 for (tp = nsprotox; tp->pr_name; tp++) 387 printproto(tp, tp->pr_name); 388 if (af == AF_ISO || af == AF_UNSPEC) 389 for (tp = isoprotox; tp->pr_name; tp++) 390 printproto(tp, tp->pr_name); 391 if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag) 392 unixpr(nl[N_UNIXSW].n_value); 393 exit(0); 394 } 395 396 /* 397 * Print out protocol statistics or control blocks (per sflag). 398 * If the interface was not specifically requested, and the symbol 399 * is not in the namelist, ignore this one. 400 */ 401 static void 402 printproto(tp, name) 403 register struct protox *tp; 404 char *name; 405 { 406 void (*pr)(); 407 u_long off; 408 409 if (sflag) { 410 pr = tp->pr_stats; 411 off = nl[tp->pr_sindex].n_value; 412 } else { 413 pr = tp->pr_cblocks; 414 off = nl[tp->pr_index].n_value; 415 } 416 if (pr != NULL && (off || af != AF_UNSPEC)) 417 (*pr)(off, name); 418 } 419 420 /* 421 * Read kernel memory, return 0 on success. 422 */ 423 int 424 kread(addr, buf, size) 425 u_long addr; 426 char *buf; 427 int size; 428 { 429 430 if (kvm_read(kvmd, addr, buf, size) != size) { 431 /* XXX this duplicates kvm_read's error printout */ 432 (void)fprintf(stderr, "%s: kvm_read %s\n", prog, 433 kvm_geterr(kvmd)); 434 return (-1); 435 } 436 return (0); 437 } 438 439 char * 440 plural(n) 441 int n; 442 { 443 return (n != 1 ? "s" : ""); 444 } 445 446 char * 447 plurales(n) 448 int n; 449 { 450 return (n != 1 ? "es" : ""); 451 } 452 453 /* 454 * Find the protox for the given "well-known" name. 455 */ 456 static struct protox * 457 knownname(name) 458 char *name; 459 { 460 struct protox **tpp, *tp; 461 462 for (tpp = protoprotox; *tpp; tpp++) 463 for (tp = *tpp; tp->pr_name; tp++) 464 if (strcmp(tp->pr_name, name) == 0) 465 return (tp); 466 return (NULL); 467 } 468 469 /* 470 * Find the protox corresponding to name. 471 */ 472 static struct protox * 473 name2protox(name) 474 char *name; 475 { 476 struct protox *tp; 477 char **alias; /* alias from p->aliases */ 478 struct protoent *p; 479 480 /* 481 * Try to find the name in the list of "well-known" names. If that 482 * fails, check if name is an alias for an Internet protocol. 483 */ 484 if (tp = knownname(name)) 485 return (tp); 486 487 setprotoent(1); /* make protocol lookup cheaper */ 488 while (p = getprotoent()) { 489 /* assert: name not same as p->name */ 490 for (alias = p->p_aliases; *alias; alias++) 491 if (strcmp(name, *alias) == 0) { 492 endprotoent(); 493 return (knownname(p->p_name)); 494 } 495 } 496 endprotoent(); 497 return (NULL); 498 } 499 500 static void 501 usage() 502 { 503 (void)fprintf(stderr, 504 "usage: %s [-Aan] [-f address_family] [-M core] [-N system]\n", prog); 505 (void)fprintf(stderr, 506 " %s [-ghimnrs] [-f address_family] [-M core] [-N system]\n", prog); 507 (void)fprintf(stderr, 508 " %s [-n] [-I interface] [-M core] [-N system] [-w wait]\n", prog); 509 (void)fprintf(stderr, 510 " %s [-M core] [-N system] [-p protocol]\n", prog); 511 exit(1); 512 } 513
Indexes created Mon Sep 29 03:10:08 GMT 2025