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[] = "@(#)main.c 8.4 (Berkeley) 3/1/94"; 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 #include <sys/file.h> 46 #include <sys/protosw.h> 47 #include <sys/socket.h> 48 49 #include <netinet/in.h> 50 51 #include <ctype.h> 52 #include <errno.h> 53 #include <kvm.h> 54 #include <limits.h> 55 #include <netdb.h> 56 #include <nlist.h> 57 #include <paths.h> 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <unistd.h> 62 #include <err.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_MFCTABLE 29 125 { "_mfctable" }, 126 #define N_VIFTABLE 30 127 { "_viftable" }, 128 #define N_IPX 31 129 { "_ipxpcb"}, 130 #define N_IPXSTAT 32 131 { "_ipxstat"}, 132 #define N_SPXSTAT 33 133 { "_spx_istat"}, 134 #define N_IPXERR 34 135 { "_ipx_errstat"}, 136 "", 137 }; 138 139 struct protox { 140 u_char pr_index; /* index into nlist of cb head */ 141 u_char pr_sindex; /* index into nlist of stat block */ 142 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 143 void (*pr_cblocks)(); /* control blocks printing routine */ 144 void (*pr_stats)(); /* statistics printing routine */ 145 char *pr_name; /* well-known name */ 146 } protox[] = { 147 { N_TCB, N_TCPSTAT, 1, protopr, 148 tcp_stats, "tcp" }, 149 { N_UDB, N_UDPSTAT, 1, protopr, 150 udp_stats, "udp" }, 151 { -1, N_IPSTAT, 1, 0, 152 ip_stats, "ip" }, 153 { -1, N_ICMPSTAT, 1, 0, 154 icmp_stats, "icmp" }, 155 { -1, N_IGMPSTAT, 1, 0, 156 igmp_stats, "igmp" }, 157 { -1, -1, 0, 0, 158 0, 0 } 159 }; 160 161 struct protox ipxprotox[] = { 162 { N_IPX, N_IPXSTAT, 1, ipxprotopr, 163 ipx_stats, "ipx" }, 164 { N_IPX, N_SPXSTAT, 1, ipxprotopr, 165 spx_stats, "spx" }, 166 { -1, N_IPXERR, 1, 0, 167 ipxerr_stats, "ipx_err" }, 168 { -1, -1, 0, 0, 169 0, 0 } 170 }; 171 172 struct protox nsprotox[] = { 173 { N_IDP, N_IDPSTAT, 1, nsprotopr, 174 idp_stats, "idp" }, 175 { N_IDP, N_SPPSTAT, 1, nsprotopr, 176 spp_stats, "spp" }, 177 { -1, N_NSERR, 1, 0, 178 nserr_stats, "ns_err" }, 179 { -1, -1, 0, 0, 180 0, 0 } 181 }; 182 183 struct protox isoprotox[] = { 184 { ISO_TP, N_TPSTAT, 1, iso_protopr, 185 tp_stats, "tp" }, 186 { N_CLTP, N_CLTPSTAT, 1, iso_protopr, 187 cltp_stats, "cltp" }, 188 { -1, N_CLNPSTAT, 1, 0, 189 clnp_stats, "clnp"}, 190 { -1, N_ESISSTAT, 1, 0, 191 esis_stats, "esis"}, 192 { -1, -1, 0, 0, 193 0, 0 } 194 }; 195 196 struct protox *protoprotox[] = { protox, ipxprotox, nsprotox, isoprotox, NULL }; 197 198 static void printproto __P((struct protox *, char *)); 199 static void usage __P((void)); 200 static struct protox *name2protox __P((char *)); 201 static struct protox *knownname __P((char *)); 202 203 kvm_t *kvmd; 204 205 int 206 main(argc, argv) 207 int argc; 208 char *argv[]; 209 { 210 extern char *optarg; 211 extern int optind; 212 register struct protoent *p; 213 register struct protox *tp; /* for printing cblocks & stats */ 214 register char *cp; 215 int ch; 216 char *nlistf = NULL, *memf = NULL; 217 char buf[_POSIX2_LINE_MAX]; 218 char buf2[_POSIX2_LINE_MAX]; 219 220 if (cp = rindex(argv[0], '/')) 221 prog = cp + 1; 222 else 223 prog = argv[0]; 224 af = AF_UNSPEC; 225 226 while ((ch = getopt(argc, argv, "Aabdf:ghI:iM:mN:np:rstuw:")) != EOF) 227 switch(ch) { 228 case 'A': 229 Aflag = 1; 230 break; 231 case 'a': 232 aflag = 1; 233 break; 234 case 'b': 235 bflag = 1; 236 break; 237 case 'd': 238 dflag = 1; 239 break; 240 case 'f': 241 if (strcmp(optarg, "ns") == 0) 242 af = AF_NS; 243 else if (strcmp(optarg, "ipx") == 0) 244 af = AF_IPX; 245 else if (strcmp(optarg, "inet") == 0) 246 af = AF_INET; 247 else if (strcmp(optarg, "unix") == 0) 248 af = AF_UNIX; 249 else if (strcmp(optarg, "iso") == 0) 250 af = AF_ISO; 251 else { 252 errx(1, "%s: unknown address family", optarg); 253 } 254 break; 255 case 'g': 256 gflag = 1; 257 break; 258 case 'I': { 259 char *cp; 260 261 iflag = 1; 262 for (cp = interface = optarg; isalpha(*cp); cp++) 263 continue; 264 unit = atoi(cp); 265 break; 266 } 267 case 'i': 268 iflag = 1; 269 break; 270 case 'M': 271 memf = optarg; 272 break; 273 case 'm': 274 mflag = 1; 275 break; 276 case 'N': 277 nlistf = optarg; 278 break; 279 case 'n': 280 nflag = 1; 281 break; 282 case 'p': 283 if ((tp = name2protox(optarg)) == NULL) { 284 errx(1, 285 "%s: unknown or uninstrumented protocol", 286 optarg); 287 } 288 pflag = 1; 289 break; 290 case 'r': 291 rflag = 1; 292 break; 293 case 's': 294 ++sflag; 295 break; 296 case 't': 297 tflag = 1; 298 break; 299 case 'u': 300 af = AF_UNIX; 301 break; 302 case 'w': 303 interval = atoi(optarg); 304 iflag = 1; 305 break; 306 case '?': 307 default: 308 usage(); 309 } 310 argv += optind; 311 argc -= optind; 312 313 #define BACKWARD_COMPATIBILITY 314 #ifdef BACKWARD_COMPATIBILITY 315 if (*argv) { 316 if (isdigit(**argv)) { 317 interval = atoi(*argv); 318 if (interval <= 0) 319 usage(); 320 ++argv; 321 iflag = 1; 322 } 323 if (*argv) { 324 nlistf = *argv; 325 if (*++argv) 326 memf = *argv; 327 } 328 } 329 #endif 330 331 /* 332 * Discard setgid privileges if not the running kernel so that bad 333 * guys can't print interesting stuff from kernel memory. 334 */ 335 if (nlistf != NULL || memf != NULL) 336 setgid(getgid()); 337 338 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf); 339 if (kvmd == NULL) { 340 errx(1, "kvm_open: %s", buf); 341 } 342 if (kvm_nlist(kvmd, nl) < 0) { 343 if(nlistf) 344 errx(1, "%s: kvm_nlist: %s", nlistf, kvm_geterr(kvmd)); 345 else 346 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd)); 347 } 348 349 if (nl[0].n_type == 0) { 350 if(nlistf) 351 errx(1, "%s: no namelist", nlistf); 352 else 353 errx(1, "no namelist"); 354 } 355 if (mflag) { 356 mbpr(nl[N_MBSTAT].n_value); 357 exit(0); 358 } 359 if (pflag) { 360 if (tp->pr_stats) 361 (*tp->pr_stats)(nl[tp->pr_sindex].n_value, 362 tp->pr_name); 363 else 364 printf("%s: no stats routine\n", tp->pr_name); 365 exit(0); 366 } 367 /* 368 * Keep file descriptors open to avoid overhead 369 * of open/close on each call to get* routines. 370 */ 371 sethostent(1); 372 setnetent(1); 373 if (iflag) { 374 intpr(interval, nl[N_IFNET].n_value); 375 exit(0); 376 } 377 if (rflag) { 378 if (sflag) 379 rt_stats(nl[N_RTSTAT].n_value); 380 else 381 routepr(nl[N_RTREE].n_value); 382 exit(0); 383 } 384 if (gflag) { 385 if (sflag) 386 mrt_stats(nl[N_MRTPROTO].n_value, 387 nl[N_MRTSTAT].n_value); 388 else 389 mroutepr(nl[N_MRTPROTO].n_value, 390 nl[N_MFCTABLE].n_value, 391 nl[N_VIFTABLE].n_value); 392 exit(0); 393 } 394 if (af == AF_INET || af == AF_UNSPEC) { 395 setprotoent(1); 396 setservent(1); 397 /* ugh, this is O(MN) ... why do we do this? */ 398 while (p = getprotoent()) { 399 for (tp = protox; tp->pr_name; tp++) 400 if (strcmp(tp->pr_name, p->p_name) == 0) 401 break; 402 if (tp->pr_name == 0 || tp->pr_wanted == 0) 403 continue; 404 printproto(tp, p->p_name); 405 } 406 endprotoent(); 407 } 408 if (af == AF_IPX || af == AF_UNSPEC) 409 for (tp = ipxprotox; tp->pr_name; tp++) 410 printproto(tp, tp->pr_name); 411 if (af == AF_NS || af == AF_UNSPEC) 412 for (tp = nsprotox; tp->pr_name; tp++) 413 printproto(tp, tp->pr_name); 414 if (af == AF_ISO || af == AF_UNSPEC) 415 for (tp = isoprotox; tp->pr_name; tp++) 416 printproto(tp, tp->pr_name); 417 if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag) 418 unixpr(nl[N_UNIXSW].n_value); 419 exit(0); 420 } 421 422 /* 423 * Print out protocol statistics or control blocks (per sflag). 424 * If the interface was not specifically requested, and the symbol 425 * is not in the namelist, ignore this one. 426 */ 427 static void 428 printproto(tp, name) 429 register struct protox *tp; 430 char *name; 431 { 432 void (*pr)(); 433 u_long off; 434 435 if (sflag) { 436 pr = tp->pr_stats; 437 off = nl[tp->pr_sindex].n_value; 438 } else { 439 pr = tp->pr_cblocks; 440 off = nl[tp->pr_index].n_value; 441 } 442 if (pr != NULL && (off || af != AF_UNSPEC)) 443 (*pr)(off, name); 444 } 445 446 /* 447 * Read kernel memory, return 0 on success. 448 */ 449 int 450 kread(addr, buf, size) 451 u_long addr; 452 char *buf; 453 int size; 454 { 455 456 if (kvm_read(kvmd, addr, buf, size) != size) { 457 warnx("%s", kvm_geterr(kvmd)); 458 return (-1); 459 } 460 return (0); 461 } 462 463 char * 464 plural(n) 465 int n; 466 { 467 return (n != 1 ? "s" : ""); 468 } 469 470 char * 471 plurales(n) 472 int n; 473 { 474 return (n != 1 ? "es" : ""); 475 } 476 477 /* 478 * Find the protox for the given "well-known" name. 479 */ 480 static struct protox * 481 knownname(name) 482 char *name; 483 { 484 struct protox **tpp, *tp; 485 486 for (tpp = protoprotox; *tpp; tpp++) 487 for (tp = *tpp; tp->pr_name; tp++) 488 if (strcmp(tp->pr_name, name) == 0) 489 return (tp); 490 return (NULL); 491 } 492 493 /* 494 * Find the protox corresponding to name. 495 */ 496 static struct protox * 497 name2protox(name) 498 char *name; 499 { 500 struct protox *tp; 501 char **alias; /* alias from p->aliases */ 502 struct protoent *p; 503 504 /* 505 * Try to find the name in the list of "well-known" names. If that 506 * fails, check if name is an alias for an Internet protocol. 507 */ 508 if (tp = knownname(name)) 509 return (tp); 510 511 setprotoent(1); /* make protocol lookup cheaper */ 512 while (p = getprotoent()) { 513 /* assert: name not same as p->name */ 514 for (alias = p->p_aliases; *alias; alias++) 515 if (strcmp(name, *alias) == 0) { 516 endprotoent(); 517 return (knownname(p->p_name)); 518 } 519 } 520 endprotoent(); 521 return (NULL); 522 } 523 524 static void 525 usage() 526 { 527 (void)fprintf(stderr, 528 "usage: %s [-Aan] [-f address_family] [-M core] [-N system]\n", prog); 529 (void)fprintf(stderr, 530 " %s [-bdghimnrs] [-f address_family] [-M core] [-N system]\n", prog); 531 (void)fprintf(stderr, 532 " %s [-bdn] [-I interface] [-M core] [-N system] [-w wait]\n", prog); 533 (void)fprintf(stderr, 534 " %s [-M core] [-N system] [-p protocol]\n", prog); 535 exit(1); 536 } 537