main.c revision 1.6
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 1.6 1994/05/13 08:08:14 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_TCB 2 71 { "_tcb" }, 72 #define N_TCPSTAT 3 73 { "_tcpstat" }, 74 #define N_UDB 4 75 { "_udb" }, 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_MRTTABLE 29 125 { "_mrttable" }, 126 #define N_VIFTABLE 30 127 { "_viftable" }, 128 "", 129 }; 130 131 struct protox { 132 u_char pr_index; /* index into nlist of cb head */ 133 u_char pr_sindex; /* index into nlist of stat block */ 134 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 135 void (*pr_cblocks)(); /* control blocks printing routine */ 136 void (*pr_stats)(); /* statistics printing routine */ 137 char *pr_name; /* well-known name */ 138 } protox[] = { 139 { N_TCB, N_TCPSTAT, 1, protopr, 140 tcp_stats, "tcp" }, 141 { N_UDB, N_UDPSTAT, 1, protopr, 142 udp_stats, "udp" }, 143 { -1, N_IPSTAT, 1, 0, 144 ip_stats, "ip" }, 145 { -1, N_ICMPSTAT, 1, 0, 146 icmp_stats, "icmp" }, 147 { -1, N_IGMPSTAT, 1, 0, 148 igmp_stats, "igmp" }, 149 { -1, -1, 0, 0, 150 0, 0 } 151 }; 152 153 struct protox nsprotox[] = { 154 { N_IDP, N_IDPSTAT, 1, nsprotopr, 155 idp_stats, "idp" }, 156 { N_IDP, N_SPPSTAT, 1, nsprotopr, 157 spp_stats, "spp" }, 158 { -1, N_NSERR, 1, 0, 159 nserr_stats, "ns_err" }, 160 { -1, -1, 0, 0, 161 0, 0 } 162 }; 163 164 struct protox isoprotox[] = { 165 { ISO_TP, N_TPSTAT, 1, iso_protopr, 166 tp_stats, "tp" }, 167 { N_CLTP, N_CLTPSTAT, 1, iso_protopr, 168 cltp_stats, "cltp" }, 169 { -1, N_CLNPSTAT, 1, 0, 170 clnp_stats, "clnp"}, 171 { -1, N_ESISSTAT, 1, 0, 172 esis_stats, "esis"}, 173 { -1, -1, 0, 0, 174 0, 0 } 175 }; 176 177 struct protox *protoprotox[] = { protox, nsprotox, isoprotox, NULL }; 178 179 static void printproto __P((struct protox *, char *)); 180 static void usage __P((void)); 181 static struct protox *name2protox __P((char *)); 182 static struct protox *knownname __P((char *)); 183 184 kvm_t *kvmd; 185 186 int 187 main(argc, argv) 188 int argc; 189 char *argv[]; 190 { 191 extern char *optarg; 192 extern int optind; 193 register struct protoent *p; 194 register struct protox *tp; /* for printing cblocks & stats */ 195 register char *cp; 196 int ch; 197 char *nlistf = NULL, *memf = NULL; 198 char buf[_POSIX2_LINE_MAX]; 199 200 if (cp = rindex(argv[0], '/')) 201 prog = cp + 1; 202 else 203 prog = argv[0]; 204 af = AF_UNSPEC; 205 206 while ((ch = getopt(argc, argv, "Aadf:ghI:iM:mN:np:rstuw:")) != EOF) 207 switch(ch) { 208 case 'A': 209 Aflag = 1; 210 break; 211 case 'a': 212 aflag = 1; 213 break; 214 case 'd': 215 dflag = 1; 216 break; 217 case 'f': 218 if (strcmp(optarg, "ns") == 0) 219 af = AF_NS; 220 else if (strcmp(optarg, "inet") == 0) 221 af = AF_INET; 222 else if (strcmp(optarg, "unix") == 0) 223 af = AF_UNIX; 224 else if (strcmp(optarg, "iso") == 0) 225 af = AF_ISO; 226 else { 227 (void)fprintf(stderr, 228 "%s: %s: unknown address family\n", 229 prog, optarg); 230 exit(1); 231 } 232 break; 233 case 'g': 234 gflag = 1; 235 break; 236 case 'I': { 237 char *cp; 238 239 iflag = 1; 240 for (cp = interface = optarg; isalpha(*cp); cp++) 241 continue; 242 unit = atoi(cp); 243 *cp = '\0'; 244 break; 245 } 246 case 'i': 247 iflag = 1; 248 break; 249 case 'M': 250 memf = optarg; 251 break; 252 case 'm': 253 mflag = 1; 254 break; 255 case 'N': 256 nlistf = optarg; 257 break; 258 case 'n': 259 nflag = 1; 260 break; 261 case 'p': 262 if ((tp = name2protox(optarg)) == NULL) { 263 (void)fprintf(stderr, 264 "%s: %s: unknown or uninstrumented protocol\n", 265 prog, optarg); 266 exit(1); 267 } 268 pflag = 1; 269 break; 270 case 'r': 271 rflag = 1; 272 break; 273 case 's': 274 ++sflag; 275 break; 276 case 't': 277 tflag = 1; 278 break; 279 case 'u': 280 af = AF_UNIX; 281 break; 282 case 'w': 283 interval = atoi(optarg); 284 iflag = 1; 285 break; 286 case '?': 287 default: 288 usage(); 289 } 290 argv += optind; 291 argc -= optind; 292 293 #define BACKWARD_COMPATIBILITY 294 #ifdef BACKWARD_COMPATIBILITY 295 if (*argv) { 296 if (isdigit(**argv)) { 297 interval = atoi(*argv); 298 if (interval <= 0) 299 usage(); 300 ++argv; 301 iflag = 1; 302 } 303 if (*argv) { 304 nlistf = *argv; 305 if (*++argv) 306 memf = *argv; 307 } 308 } 309 #endif 310 311 /* 312 * Discard setgid privileges if not the running kernel so that bad 313 * guys can't print interesting stuff from kernel memory. 314 */ 315 if (nlistf != NULL || memf != NULL) 316 setgid(getgid()); 317 318 if ((kvmd = kvm_open(nlistf, memf, NULL, O_RDONLY, prog)) == NULL) { 319 fprintf(stderr, "%s: kvm_open: %s\n", prog, buf); 320 exit(1); 321 } 322 if (kvm_nlist(kvmd, nl) < 0 || nl[0].n_type == 0) { 323 if (nlistf) 324 fprintf(stderr, "%s: %s: no namelist\n", prog, nlistf); 325 else 326 fprintf(stderr, "%s: no namelist\n", prog); 327 exit(1); 328 } 329 if (mflag) { 330 mbpr(nl[N_MBSTAT].n_value); 331 exit(0); 332 } 333 if (pflag) { 334 if (tp->pr_stats) 335 (*tp->pr_stats)(nl[tp->pr_sindex].n_value, 336 tp->pr_name); 337 else 338 printf("%s: no stats routine\n", tp->pr_name); 339 exit(0); 340 } 341 /* 342 * Keep file descriptors open to avoid overhead 343 * of open/close on each call to get* routines. 344 */ 345 sethostent(1); 346 setnetent(1); 347 if (iflag) { 348 intpr(interval, nl[N_IFNET].n_value); 349 exit(0); 350 } 351 if (rflag) { 352 if (sflag) 353 rt_stats(nl[N_RTSTAT].n_value); 354 else 355 routepr(nl[N_RTREE].n_value); 356 exit(0); 357 } 358 if (gflag) { 359 if (sflag) 360 mrt_stats(nl[N_MRTPROTO].n_value, 361 nl[N_MRTSTAT].n_value); 362 else 363 mroutepr(nl[N_MRTPROTO].n_value, 364 nl[N_MRTTABLE].n_value, 365 nl[N_VIFTABLE].n_value); 366 exit(0); 367 } 368 if (af == AF_INET || af == AF_UNSPEC) { 369 setprotoent(1); 370 setservent(1); 371 /* ugh, this is O(MN) ... why do we do this? */ 372 while (p = getprotoent()) { 373 for (tp = protox; tp->pr_name; tp++) 374 if (strcmp(tp->pr_name, p->p_name) == 0) 375 break; 376 if (tp->pr_name == 0 || tp->pr_wanted == 0) 377 continue; 378 printproto(tp, p->p_name); 379 } 380 endprotoent(); 381 } 382 if (af == AF_NS || af == AF_UNSPEC) 383 for (tp = nsprotox; tp->pr_name; tp++) 384 printproto(tp, tp->pr_name); 385 if (af == AF_ISO || af == AF_UNSPEC) 386 for (tp = isoprotox; tp->pr_name; tp++) 387 printproto(tp, tp->pr_name); 388 if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag) 389 unixpr(nl[N_UNIXSW].n_value); 390 exit(0); 391 } 392 393 /* 394 * Print out protocol statistics or control blocks (per sflag). 395 * If the interface was not specifically requested, and the symbol 396 * is not in the namelist, ignore this one. 397 */ 398 static void 399 printproto(tp, name) 400 register struct protox *tp; 401 char *name; 402 { 403 void (*pr)(); 404 u_long off; 405 406 if (sflag) { 407 pr = tp->pr_stats; 408 off = nl[tp->pr_sindex].n_value; 409 } else { 410 pr = tp->pr_cblocks; 411 off = nl[tp->pr_index].n_value; 412 } 413 if (pr != NULL && (off || af != AF_UNSPEC)) 414 (*pr)(off, name); 415 } 416 417 /* 418 * Read kernel memory, return 0 on success. 419 */ 420 int 421 kread(addr, buf, size) 422 u_long addr; 423 char *buf; 424 int size; 425 { 426 427 if (kvm_read(kvmd, addr, buf, size) != size) { 428 /* XXX this duplicates kvm_read's error printout */ 429 (void)fprintf(stderr, "%s: kvm_read %s\n", prog, 430 kvm_geterr(kvmd)); 431 return (-1); 432 } 433 return (0); 434 } 435 436 char * 437 plural(n) 438 int n; 439 { 440 return (n != 1 ? "s" : ""); 441 } 442 443 char * 444 plurales(n) 445 int n; 446 { 447 return (n != 1 ? "es" : ""); 448 } 449 450 /* 451 * Find the protox for the given "well-known" name. 452 */ 453 static struct protox * 454 knownname(name) 455 char *name; 456 { 457 struct protox **tpp, *tp; 458 459 for (tpp = protoprotox; *tpp; tpp++) 460 for (tp = *tpp; tp->pr_name; tp++) 461 if (strcmp(tp->pr_name, name) == 0) 462 return (tp); 463 return (NULL); 464 } 465 466 /* 467 * Find the protox corresponding to name. 468 */ 469 static struct protox * 470 name2protox(name) 471 char *name; 472 { 473 struct protox *tp; 474 char **alias; /* alias from p->aliases */ 475 struct protoent *p; 476 477 /* 478 * Try to find the name in the list of "well-known" names. If that 479 * fails, check if name is an alias for an Internet protocol. 480 */ 481 if (tp = knownname(name)) 482 return (tp); 483 484 setprotoent(1); /* make protocol lookup cheaper */ 485 while (p = getprotoent()) { 486 /* assert: name not same as p->name */ 487 for (alias = p->p_aliases; *alias; alias++) 488 if (strcmp(name, *alias) == 0) { 489 endprotoent(); 490 return (knownname(p->p_name)); 491 } 492 } 493 endprotoent(); 494 return (NULL); 495 } 496 497 static void 498 usage() 499 { 500 (void)fprintf(stderr, 501 "usage: %s [-Aan] [-f address_family] [-M core] [-N system]\n", prog); 502 (void)fprintf(stderr, 503 " %s [-ghimnrs] [-f address_family] [-M core] [-N system]\n", prog); 504 (void)fprintf(stderr, 505 " %s [-n] [-I interface] [-M core] [-N system] [-w wait]\n", prog); 506 (void)fprintf(stderr, 507 " %s [-M core] [-N system] [-p protocol]\n", prog); 508 exit(1); 509 } 510
Indexes created Mon Sep 22 21:09:42 GMT 2025