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 { "_localsw" }, 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 #ifdef NS 173 struct protox nsprotox[] = { 174 { N_IDP, N_IDPSTAT, 1, nsprotopr, 175 idp_stats, "idp" }, 176 { N_IDP, N_SPPSTAT, 1, nsprotopr, 177 spp_stats, "spp" }, 178 { -1, N_NSERR, 1, 0, 179 nserr_stats, "ns_err" }, 180 { -1, -1, 0, 0, 181 0, 0 } 182 }; 183 #endif 184 185 #ifdef ISO 186 struct protox isoprotox[] = { 187 { ISO_TP, N_TPSTAT, 1, iso_protopr, 188 tp_stats, "tp" }, 189 { N_CLTP, N_CLTPSTAT, 1, iso_protopr, 190 cltp_stats, "cltp" }, 191 { -1, N_CLNPSTAT, 1, 0, 192 clnp_stats, "clnp"}, 193 { -1, N_ESISSTAT, 1, 0, 194 esis_stats, "esis"}, 195 { -1, -1, 0, 0, 196 0, 0 } 197 }; 198 #endif 199 200 struct protox *protoprotox[] = { protox, ipxprotox, 201 #ifdef NS 202 nsprotox, 203 #endif 204 #ifdef ISO 205 isoprotox, 206 #endif 207 NULL }; 208 209 static void printproto __P((struct protox *, char *)); 210 static void usage __P((void)); 211 static struct protox *name2protox __P((char *)); 212 static struct protox *knownname __P((char *)); 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 register struct protoent *p; 224 register struct protox *tp; /* for printing cblocks & stats */ 225 register char *cp; 226 int ch; 227 char *nlistf = NULL, *memf = NULL; 228 char buf[_POSIX2_LINE_MAX]; 229 char buf2[_POSIX2_LINE_MAX]; 230 231 if (cp = rindex(argv[0], '/')) 232 prog = cp + 1; 233 else 234 prog = argv[0]; 235 af = AF_UNSPEC; 236 237 while ((ch = getopt(argc, argv, "Aabdf:ghI:iM:mN:np:rstuw:")) != EOF) 238 switch(ch) { 239 case 'A': 240 Aflag = 1; 241 break; 242 case 'a': 243 aflag = 1; 244 break; 245 case 'b': 246 bflag = 1; 247 break; 248 case 'd': 249 dflag = 1; 250 break; 251 case 'f': 252 #ifdef NS 253 if (strcmp(optarg, "ns") == 0) 254 af = AF_NS; 255 else 256 #endif 257 if (strcmp(optarg, "ipx") == 0) 258 af = AF_IPX; 259 else if (strcmp(optarg, "inet") == 0) 260 af = AF_INET; 261 else if (strcmp(optarg, "unix") == 0) 262 af = AF_UNIX; 263 #ifdef ISO 264 else if (strcmp(optarg, "iso") == 0) 265 af = AF_ISO; 266 #endif 267 else { 268 errx(1, "%s: unknown address family", optarg); 269 } 270 break; 271 case 'g': 272 gflag = 1; 273 break; 274 case 'I': { 275 char *cp; 276 277 iflag = 1; 278 for (cp = interface = optarg; isalpha(*cp); cp++) 279 continue; 280 unit = atoi(cp); 281 break; 282 } 283 case 'i': 284 iflag = 1; 285 break; 286 case 'M': 287 memf = optarg; 288 break; 289 case 'm': 290 mflag = 1; 291 break; 292 case 'N': 293 nlistf = optarg; 294 break; 295 case 'n': 296 nflag = 1; 297 break; 298 case 'p': 299 if ((tp = name2protox(optarg)) == NULL) { 300 errx(1, 301 "%s: unknown or uninstrumented protocol", 302 optarg); 303 } 304 pflag = 1; 305 break; 306 case 'r': 307 rflag = 1; 308 break; 309 case 's': 310 ++sflag; 311 break; 312 case 't': 313 tflag = 1; 314 break; 315 case 'u': 316 af = AF_UNIX; 317 break; 318 case 'w': 319 interval = atoi(optarg); 320 iflag = 1; 321 break; 322 case '?': 323 default: 324 usage(); 325 } 326 argv += optind; 327 argc -= optind; 328 329 #define BACKWARD_COMPATIBILITY 330 #ifdef BACKWARD_COMPATIBILITY 331 if (*argv) { 332 if (isdigit(**argv)) { 333 interval = atoi(*argv); 334 if (interval <= 0) 335 usage(); 336 ++argv; 337 iflag = 1; 338 } 339 if (*argv) { 340 nlistf = *argv; 341 if (*++argv) 342 memf = *argv; 343 } 344 } 345 #endif 346 347 /* 348 * Discard setgid privileges if not the running kernel so that bad 349 * guys can't print interesting stuff from kernel memory. 350 */ 351 if (nlistf != NULL || memf != NULL) 352 setgid(getgid()); 353 354 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf); 355 if (kvmd == NULL) { 356 errx(1, "kvm_open: %s", buf); 357 } 358 if (kvm_nlist(kvmd, nl) < 0) { 359 if(nlistf) 360 errx(1, "%s: kvm_nlist: %s", nlistf, kvm_geterr(kvmd)); 361 else 362 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd)); 363 } 364 365 if (nl[0].n_type == 0) { 366 if(nlistf) 367 errx(1, "%s: no namelist", nlistf); 368 else 369 errx(1, "no namelist"); 370 } 371 if (mflag) { 372 mbpr(nl[N_MBSTAT].n_value); 373 exit(0); 374 } 375 if (pflag) { 376 if (tp->pr_stats) 377 (*tp->pr_stats)(nl[tp->pr_sindex].n_value, 378 tp->pr_name); 379 else 380 printf("%s: no stats routine\n", tp->pr_name); 381 exit(0); 382 } 383 #if 0 384 /* 385 * Keep file descriptors open to avoid overhead 386 * of open/close on each call to get* routines. 387 */ 388 sethostent(1); 389 setnetent(1); 390 #else 391 /* 392 * This does not make sense any more with DNS being default over 393 * the files. Doing a setXXXXent(1) causes a tcp connection to be 394 * used for the queries, which is slower. 395 */ 396 #endif 397 if (iflag) { 398 intpr(interval, nl[N_IFNET].n_value); 399 exit(0); 400 } 401 if (rflag) { 402 if (sflag) 403 rt_stats(nl[N_RTSTAT].n_value); 404 else 405 routepr(nl[N_RTREE].n_value); 406 exit(0); 407 } 408 if (gflag) { 409 if (sflag) 410 mrt_stats(nl[N_MRTPROTO].n_value, 411 nl[N_MRTSTAT].n_value); 412 else 413 mroutepr(nl[N_MRTPROTO].n_value, 414 nl[N_MFCTABLE].n_value, 415 nl[N_VIFTABLE].n_value); 416 exit(0); 417 } 418 if (af == AF_INET || af == AF_UNSPEC) { 419 setprotoent(1); 420 setservent(1); 421 /* ugh, this is O(MN) ... why do we do this? */ 422 while (p = getprotoent()) { 423 for (tp = protox; tp->pr_name; tp++) 424 if (strcmp(tp->pr_name, p->p_name) == 0) 425 break; 426 if (tp->pr_name == 0 || tp->pr_wanted == 0) 427 continue; 428 printproto(tp, p->p_name); 429 } 430 endprotoent(); 431 } 432 if (af == AF_IPX || af == AF_UNSPEC) 433 for (tp = ipxprotox; tp->pr_name; tp++) 434 printproto(tp, tp->pr_name); 435 #ifdef NS 436 if (af == AF_NS || af == AF_UNSPEC) 437 for (tp = nsprotox; tp->pr_name; tp++) 438 printproto(tp, tp->pr_name); 439 #endif 440 #ifdef ISO 441 if (af == AF_ISO || af == AF_UNSPEC) 442 for (tp = isoprotox; tp->pr_name; tp++) 443 printproto(tp, tp->pr_name); 444 #endif 445 if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag) 446 unixpr(nl[N_UNIXSW].n_value); 447 exit(0); 448 } 449 450 /* 451 * Print out protocol statistics or control blocks (per sflag). 452 * If the interface was not specifically requested, and the symbol 453 * is not in the namelist, ignore this one. 454 */ 455 static void 456 printproto(tp, name) 457 register struct protox *tp; 458 char *name; 459 { 460 void (*pr)(); 461 u_long off; 462 463 if (sflag) { 464 pr = tp->pr_stats; 465 off = nl[tp->pr_sindex].n_value; 466 } else { 467 pr = tp->pr_cblocks; 468 off = nl[tp->pr_index].n_value; 469 } 470 if (pr != NULL && (off || af != AF_UNSPEC)) 471 (*pr)(off, name); 472 } 473 474 /* 475 * Read kernel memory, return 0 on success. 476 */ 477 int 478 kread(addr, buf, size) 479 u_long addr; 480 char *buf; 481 int size; 482 { 483 484 if (kvm_read(kvmd, addr, buf, size) != size) { 485 warnx("%s", kvm_geterr(kvmd)); 486 return (-1); 487 } 488 return (0); 489 } 490 491 char * 492 plural(n) 493 int n; 494 { 495 return (n != 1 ? "s" : ""); 496 } 497 498 char * 499 plurales(n) 500 int n; 501 { 502 return (n != 1 ? "es" : ""); 503 } 504 505 /* 506 * Find the protox for the given "well-known" name. 507 */ 508 static struct protox * 509 knownname(name) 510 char *name; 511 { 512 struct protox **tpp, *tp; 513 514 for (tpp = protoprotox; *tpp; tpp++) 515 for (tp = *tpp; tp->pr_name; tp++) 516 if (strcmp(tp->pr_name, name) == 0) 517 return (tp); 518 return (NULL); 519 } 520 521 /* 522 * Find the protox corresponding to name. 523 */ 524 static struct protox * 525 name2protox(name) 526 char *name; 527 { 528 struct protox *tp; 529 char **alias; /* alias from p->aliases */ 530 struct protoent *p; 531 532 /* 533 * Try to find the name in the list of "well-known" names. If that 534 * fails, check if name is an alias for an Internet protocol. 535 */ 536 if (tp = knownname(name)) 537 return (tp); 538 539 setprotoent(1); /* make protocol lookup cheaper */ 540 while (p = getprotoent()) { 541 /* assert: name not same as p->name */ 542 for (alias = p->p_aliases; *alias; alias++) 543 if (strcmp(name, *alias) == 0) { 544 endprotoent(); 545 return (knownname(p->p_name)); 546 } 547 } 548 endprotoent(); 549 return (NULL); 550 } 551 552 static void 553 usage() 554 { 555 (void)fprintf(stderr, 556 "usage: %s [-Aan] [-f address_family] [-M core] [-N system]\n", prog); 557 (void)fprintf(stderr, 558 " %s [-bdghimnrs] [-f address_family] [-M core] [-N system]\n", prog); 559 (void)fprintf(stderr, 560 " %s [-bdn] [-I interface] [-M core] [-N system] [-w wait]\n", prog); 561 (void)fprintf(stderr, 562 " %s [-M core] [-N system] [-p protocol]\n", prog); 563 exit(1); 564 } 565 566 void 567 trimdomain(cp) 568 char *cp; 569 { 570 static char domain[MAXHOSTNAMELEN + 1]; 571 static int first = 1; 572 char *s; 573 574 if (first) { 575 first = 0; 576 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 577 (s = strchr(domain, '.'))) 578 (void) strcpy(domain, s + 1); 579 else 580 domain[0] = 0; 581 } 582 583 if (domain[0]) { 584 while ((cp = strchr(cp, '.'))) { 585 if (!strcasecmp(cp + 1, domain)) { 586 *cp = 0; /* hit it */ 587 break; 588 } else { 589 cp++; 590 } 591 } 592 } 593 } 594 595