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_DDPSTAT 34 135 { "_ddpstat"}, 136 #define N_DDPCB 35 137 { "_ddpcb"}, 138 #define N_DIVPCB 36 139 { "_divcb"}, 140 #define N_DIVSTAT 37 141 { "_divstat"}, 142 { "" }, 143 }; 144 145 struct protox { 146 u_char pr_index; /* index into nlist of cb head */ 147 u_char pr_sindex; /* index into nlist of stat block */ 148 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 149 void (*pr_cblocks)(); /* control blocks printing routine */ 150 void (*pr_stats)(); /* statistics printing routine */ 151 char *pr_name; /* well-known name */ 152 } protox[] = { 153 { N_TCB, N_TCPSTAT, 1, protopr, 154 tcp_stats, "tcp" }, 155 { N_UDB, N_UDPSTAT, 1, protopr, 156 udp_stats, "udp" }, 157 { N_DIVPCB, N_DIVSTAT, 1, protopr, 158 NULL, "divert" }, /* no stat structure yet */ 159 { -1, N_IPSTAT, 1, 0, 160 ip_stats, "ip" }, 161 { -1, N_ICMPSTAT, 1, 0, 162 icmp_stats, "icmp" }, 163 { -1, N_IGMPSTAT, 1, 0, 164 igmp_stats, "igmp" }, 165 { -1, -1, 0, 0, 166 0, 0 } 167 }; 168 169 struct protox atalkprotox[] = { 170 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, 171 ddp_stats, "ddp" }, 172 { -1, -1, 0, 0, 173 0, 0 } 174 }; 175 176 struct protox ipxprotox[] = { 177 { N_IPX, N_IPXSTAT, 1, ipxprotopr, 178 ipx_stats, "ipx" }, 179 { N_IPX, N_SPXSTAT, 1, ipxprotopr, 180 spx_stats, "spx" }, 181 { -1, -1, 0, 0, 182 0, 0 } 183 }; 184 185 #ifdef NS 186 struct protox nsprotox[] = { 187 { N_IDP, N_IDPSTAT, 1, nsprotopr, 188 idp_stats, "idp" }, 189 { N_IDP, N_SPPSTAT, 1, nsprotopr, 190 spp_stats, "spp" }, 191 { -1, N_NSERR, 1, 0, 192 nserr_stats, "ns_err" }, 193 { -1, -1, 0, 0, 194 0, 0 } 195 }; 196 #endif 197 198 #ifdef ISO 199 struct protox isoprotox[] = { 200 { ISO_TP, N_TPSTAT, 1, iso_protopr, 201 tp_stats, "tp" }, 202 { N_CLTP, N_CLTPSTAT, 1, iso_protopr, 203 cltp_stats, "cltp" }, 204 { -1, N_CLNPSTAT, 1, 0, 205 clnp_stats, "clnp"}, 206 { -1, N_ESISSTAT, 1, 0, 207 esis_stats, "esis"}, 208 { -1, -1, 0, 0, 209 0, 0 } 210 }; 211 #endif 212 213 struct protox *protoprotox[] = { protox, ipxprotox, atalkprotox, 214 #ifdef NS 215 nsprotox, 216 #endif 217 #ifdef ISO 218 isoprotox, 219 #endif 220 NULL }; 221 222 static void printproto __P((struct protox *, char *)); 223 static void usage __P((void)); 224 static struct protox *name2protox __P((char *)); 225 static struct protox *knownname __P((char *)); 226 227 kvm_t *kvmd; 228 229 int 230 main(argc, argv) 231 int argc; 232 char *argv[]; 233 { 234 extern char *optarg; 235 extern int optind; 236 register struct protoent *p; 237 register struct protox *tp; /* for printing cblocks & stats */ 238 register char *cp; 239 int ch; 240 char *nlistf = NULL, *memf = NULL; 241 char buf[_POSIX2_LINE_MAX]; 242 243 if ((cp = rindex(argv[0], '/'))) 244 prog = cp + 1; 245 else 246 prog = argv[0]; 247 af = AF_UNSPEC; 248 249 while ((ch = getopt(argc, argv, "Aabdf:ghI:iM:mN:np:rstuw:")) != -1) 250 switch(ch) { 251 case 'A': 252 Aflag = 1; 253 break; 254 case 'a': 255 aflag = 1; 256 break; 257 case 'b': 258 bflag = 1; 259 break; 260 case 'd': 261 dflag = 1; 262 break; 263 case 'f': 264 #ifdef NS 265 if (strcmp(optarg, "ns") == 0) 266 af = AF_NS; 267 else 268 #endif 269 if (strcmp(optarg, "ipx") == 0) 270 af = AF_IPX; 271 else if (strcmp(optarg, "inet") == 0) 272 af = AF_INET; 273 else if (strcmp(optarg, "unix") == 0) 274 af = AF_UNIX; 275 else if (strcmp(optarg, "atalk") == 0) 276 af = AF_APPLETALK; 277 #ifdef ISO 278 else if (strcmp(optarg, "iso") == 0) 279 af = AF_ISO; 280 #endif 281 else { 282 errx(1, "%s: unknown address family", optarg); 283 } 284 break; 285 case 'g': 286 gflag = 1; 287 break; 288 case 'I': { 289 char *cp; 290 291 iflag = 1; 292 for (cp = interface = optarg; isalpha(*cp); cp++) 293 continue; 294 unit = atoi(cp); 295 break; 296 } 297 case 'i': 298 iflag = 1; 299 break; 300 case 'M': 301 memf = optarg; 302 break; 303 case 'm': 304 mflag = 1; 305 break; 306 case 'N': 307 nlistf = optarg; 308 break; 309 case 'n': 310 nflag = 1; 311 break; 312 case 'p': 313 if ((tp = name2protox(optarg)) == NULL) { 314 errx(1, 315 "%s: unknown or uninstrumented protocol", 316 optarg); 317 } 318 pflag = 1; 319 break; 320 case 'r': 321 rflag = 1; 322 break; 323 case 's': 324 ++sflag; 325 break; 326 case 't': 327 tflag = 1; 328 break; 329 case 'u': 330 af = AF_UNIX; 331 break; 332 case 'w': 333 interval = atoi(optarg); 334 iflag = 1; 335 break; 336 case '?': 337 default: 338 usage(); 339 } 340 argv += optind; 341 argc -= optind; 342 343 #define BACKWARD_COMPATIBILITY 344 #ifdef BACKWARD_COMPATIBILITY 345 if (*argv) { 346 if (isdigit(**argv)) { 347 interval = atoi(*argv); 348 if (interval <= 0) 349 usage(); 350 ++argv; 351 iflag = 1; 352 } 353 if (*argv) { 354 nlistf = *argv; 355 if (*++argv) 356 memf = *argv; 357 } 358 } 359 #endif 360 361 /* 362 * Discard setgid privileges if not the running kernel so that bad 363 * guys can't print interesting stuff from kernel memory. 364 */ 365 if (nlistf != NULL || memf != NULL) 366 setgid(getgid()); 367 368 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf); 369 if (kvmd == NULL) { 370 errx(1, "kvm_open: %s", buf); 371 } 372 if (kvm_nlist(kvmd, nl) < 0) { 373 if(nlistf) 374 errx(1, "%s: kvm_nlist: %s", nlistf, kvm_geterr(kvmd)); 375 else 376 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd)); 377 } 378 379 if (nl[0].n_type == 0) { 380 if(nlistf) 381 errx(1, "%s: no namelist", nlistf); 382 else 383 errx(1, "no namelist"); 384 } 385 if (mflag) { 386 mbpr(nl[N_MBSTAT].n_value); 387 exit(0); 388 } 389 if (pflag) { 390 if (tp->pr_stats) 391 (*tp->pr_stats)(nl[tp->pr_sindex].n_value, 392 tp->pr_name); 393 else 394 printf("%s: no stats routine\n", tp->pr_name); 395 exit(0); 396 } 397 #if 0 398 /* 399 * Keep file descriptors open to avoid overhead 400 * of open/close on each call to get* routines. 401 */ 402 sethostent(1); 403 setnetent(1); 404 #else 405 /* 406 * This does not make sense any more with DNS being default over 407 * the files. Doing a setXXXXent(1) causes a tcp connection to be 408 * used for the queries, which is slower. 409 */ 410 #endif 411 if (iflag) { 412 intpr(interval, nl[N_IFNET].n_value); 413 exit(0); 414 } 415 if (rflag) { 416 if (sflag) 417 rt_stats(nl[N_RTSTAT].n_value); 418 else 419 routepr(nl[N_RTREE].n_value); 420 exit(0); 421 } 422 if (gflag) { 423 if (sflag) 424 mrt_stats(nl[N_MRTPROTO].n_value, 425 nl[N_MRTSTAT].n_value); 426 else 427 mroutepr(nl[N_MRTPROTO].n_value, 428 nl[N_MFCTABLE].n_value, 429 nl[N_VIFTABLE].n_value); 430 exit(0); 431 } 432 if (af == AF_INET || af == AF_UNSPEC) { 433 setprotoent(1); 434 setservent(1); 435 /* ugh, this is O(MN) ... why do we do this? */ 436 while ((p = getprotoent())) { 437 for (tp = protox; tp->pr_name; tp++) 438 if (strcmp(tp->pr_name, p->p_name) == 0) 439 break; 440 if (tp->pr_name == 0 || tp->pr_wanted == 0) 441 continue; 442 printproto(tp, p->p_name); 443 } 444 endprotoent(); 445 } 446 if (af == AF_IPX || af == AF_UNSPEC) 447 for (tp = ipxprotox; tp->pr_name; tp++) 448 printproto(tp, tp->pr_name); 449 if (af == AF_APPLETALK || af == AF_UNSPEC) 450 for (tp = atalkprotox; tp->pr_name; tp++) 451 printproto(tp, tp->pr_name); 452 #ifdef NS 453 if (af == AF_NS || af == AF_UNSPEC) 454 for (tp = nsprotox; tp->pr_name; tp++) 455 printproto(tp, tp->pr_name); 456 #endif 457 #ifdef ISO 458 if (af == AF_ISO || af == AF_UNSPEC) 459 for (tp = isoprotox; tp->pr_name; tp++) 460 printproto(tp, tp->pr_name); 461 #endif 462 if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag) 463 unixpr(nl[N_UNIXSW].n_value); 464 exit(0); 465 } 466 467 /* 468 * Print out protocol statistics or control blocks (per sflag). 469 * If the interface was not specifically requested, and the symbol 470 * is not in the namelist, ignore this one. 471 */ 472 static void 473 printproto(tp, name) 474 register struct protox *tp; 475 char *name; 476 { 477 void (*pr)(); 478 u_long off; 479 480 if (sflag) { 481 pr = tp->pr_stats; 482 off = nl[tp->pr_sindex].n_value; 483 } else { 484 pr = tp->pr_cblocks; 485 off = nl[tp->pr_index].n_value; 486 } 487 if (pr != NULL && (off || af != AF_UNSPEC)) 488 (*pr)(off, name); 489 } 490 491 /* 492 * Read kernel memory, return 0 on success. 493 */ 494 int 495 kread(addr, buf, size) 496 u_long addr; 497 char *buf; 498 int size; 499 { 500 501 if (kvm_read(kvmd, addr, buf, size) != size) { 502 warnx("%s", kvm_geterr(kvmd)); 503 return (-1); 504 } 505 return (0); 506 } 507 508 char * 509 plural(n) 510 int n; 511 { 512 return (n != 1 ? "s" : ""); 513 } 514 515 char * 516 plurales(n) 517 int n; 518 { 519 return (n != 1 ? "es" : ""); 520 } 521 522 /* 523 * Find the protox for the given "well-known" name. 524 */ 525 static struct protox * 526 knownname(name) 527 char *name; 528 { 529 struct protox **tpp, *tp; 530 531 for (tpp = protoprotox; *tpp; tpp++) 532 for (tp = *tpp; tp->pr_name; tp++) 533 if (strcmp(tp->pr_name, name) == 0) 534 return (tp); 535 return (NULL); 536 } 537 538 /* 539 * Find the protox corresponding to name. 540 */ 541 static struct protox * 542 name2protox(name) 543 char *name; 544 { 545 struct protox *tp; 546 char **alias; /* alias from p->aliases */ 547 struct protoent *p; 548 549 /* 550 * Try to find the name in the list of "well-known" names. If that 551 * fails, check if name is an alias for an Internet protocol. 552 */ 553 if ((tp = knownname(name))) 554 return (tp); 555 556 setprotoent(1); /* make protocol lookup cheaper */ 557 while ((p = getprotoent())) { 558 /* assert: name not same as p->name */ 559 for (alias = p->p_aliases; *alias; alias++) 560 if (strcmp(name, *alias) == 0) { 561 endprotoent(); 562 return (knownname(p->p_name)); 563 } 564 } 565 endprotoent(); 566 return (NULL); 567 } 568 569 static void 570 usage() 571 { 572 (void)fprintf(stderr, 573 "usage: %s [-Aan] [-f address_family] [-M core] [-N system]\n", prog); 574 (void)fprintf(stderr, 575 " %s [-bdghimnrs] [-f address_family] [-M core] [-N system]\n", prog); 576 (void)fprintf(stderr, 577 " %s [-bdn] [-I interface] [-M core] [-N system] [-w wait]\n", prog); 578 (void)fprintf(stderr, 579 " %s [-M core] [-N system] [-p protocol]\n", prog); 580 exit(1); 581 } 582 583 void 584 trimdomain(cp) 585 char *cp; 586 { 587 static char domain[MAXHOSTNAMELEN + 1]; 588 static int first = 1; 589 char *s; 590 591 if (first) { 592 first = 0; 593 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 594 (s = strchr(domain, '.'))) 595 (void) strcpy(domain, s + 1); 596 else 597 domain[0] = 0; 598 } 599 600 if (domain[0]) { 601 while ((cp = strchr(cp, '.'))) { 602 if (!strcasecmp(cp + 1, domain)) { 603 *cp = 0; /* hit it */ 604 break; 605 } else { 606 cp++; 607 } 608 } 609 } 610 } 611 612