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 const 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 #if 0 42 static char sccsid[] = "@(#)main.c 8.4 (Berkeley) 3/1/94"; 43 #endif 44 static const char rcsid[] = 45 "$Id: main.c,v 1.21 1998/08/05 13:54:07 phk Exp $"; 46 #endif /* not lint */ 47 48 #include <sys/param.h> 49 #include <sys/file.h> 50 #include <sys/protosw.h> 51 #include <sys/socket.h> 52 53 #include <netinet/in.h> 54 55 #include <ctype.h> 56 #include <err.h> 57 #include <errno.h> 58 #include <kvm.h> 59 #include <limits.h> 60 #include <netdb.h> 61 #include <nlist.h> 62 #include <paths.h> 63 #include <stdio.h> 64 #include <stdlib.h> 65 #include <string.h> 66 #include <unistd.h> 67 #include "netstat.h" 68 69 static struct nlist nl[] = { 70 #define N_IFNET 0 71 { "_ifnet" }, 72 #define N_IMP 1 73 { "_imp_softc" }, 74 #define N_RTSTAT 2 75 { "_rtstat" }, 76 #define N_UNIXSW 3 77 { "_localsw" }, 78 #define N_IDP 4 79 { "_nspcb"}, 80 #define N_IDPSTAT 5 81 { "_idpstat"}, 82 #define N_SPPSTAT 6 83 { "_spp_istat"}, 84 #define N_NSERR 7 85 { "_ns_errstat"}, 86 #define N_CLNPSTAT 8 87 { "_clnp_stat"}, 88 #define IN_NOTUSED 9 89 { "_tp_inpcb" }, 90 #define ISO_TP 10 91 { "_tp_refinfo" }, 92 #define N_TPSTAT 11 93 { "_tp_stat" }, 94 #define N_ESISSTAT 12 95 { "_esis_stat"}, 96 #define N_NIMP 13 97 { "_nimp"}, 98 #define N_RTREE 14 99 { "_rt_tables"}, 100 #define N_CLTP 15 101 { "_cltb"}, 102 #define N_CLTPSTAT 16 103 { "_cltpstat"}, 104 #define N_NFILE 17 105 { "_nfile" }, 106 #define N_FILE 18 107 { "_file" }, 108 #define N_MRTPROTO 19 109 { "_ip_mrtproto" }, 110 #define N_MRTSTAT 20 111 { "_mrtstat" }, 112 #define N_MFCTABLE 21 113 { "_mfctable" }, 114 #define N_VIFTABLE 22 115 { "_viftable" }, 116 #define N_IPX 23 117 { "_ipxpcb"}, 118 #define N_IPXSTAT 24 119 { "_ipxstat"}, 120 #define N_SPXSTAT 25 121 { "_spx_istat"}, 122 #define N_DDPSTAT 26 123 { "_ddpstat"}, 124 #define N_DDPCB 27 125 { "_ddpcb"}, 126 { "" }, 127 }; 128 129 struct protox { 130 u_char pr_index; /* index into nlist of cb head */ 131 u_char pr_sindex; /* index into nlist of stat block */ 132 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 133 void (*pr_cblocks)(); /* control blocks printing routine */ 134 void (*pr_stats)(); /* statistics printing routine */ 135 char *pr_name; /* well-known name */ 136 int pr_usesysctl; /* true if we use sysctl, not kvm */ 137 } protox[] = { 138 { -1, -1, 1, protopr, 139 tcp_stats, "tcp", IPPROTO_TCP }, 140 { -1, -1, 1, protopr, 141 udp_stats, "udp", IPPROTO_UDP }, 142 { -1, -1, 1, protopr, 143 NULL, "divert", IPPROTO_DIVERT }, 144 { -1, -1, 1, protopr, 145 ip_stats, "ip", IPPROTO_RAW }, 146 { -1, -1, 1, protopr, 147 icmp_stats, "icmp", IPPROTO_ICMP }, 148 { -1, -1, 1, protopr, 149 igmp_stats, "igmp", IPPROTO_IGMP }, 150 { -1, -1, 0, 0, 151 0, 0 } 152 }; 153 154 struct protox atalkprotox[] = { 155 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, 156 ddp_stats, "ddp" }, 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, -1, 0, 0, 167 0, 0 } 168 }; 169 170 #ifdef NS 171 struct protox nsprotox[] = { 172 { N_IDP, N_IDPSTAT, 1, nsprotopr, 173 idp_stats, "idp" }, 174 { N_IDP, N_SPPSTAT, 1, nsprotopr, 175 spp_stats, "spp" }, 176 { -1, N_NSERR, 1, 0, 177 nserr_stats, "ns_err" }, 178 { -1, -1, 0, 0, 179 0, 0 } 180 }; 181 #endif 182 183 #ifdef ISO 184 struct protox isoprotox[] = { 185 { ISO_TP, N_TPSTAT, 1, iso_protopr, 186 tp_stats, "tp" }, 187 { N_CLTP, N_CLTPSTAT, 1, iso_protopr, 188 cltp_stats, "cltp" }, 189 { -1, N_CLNPSTAT, 1, 0, 190 clnp_stats, "clnp"}, 191 { -1, N_ESISSTAT, 1, 0, 192 esis_stats, "esis"}, 193 { -1, -1, 0, 0, 194 0, 0 } 195 }; 196 #endif 197 198 struct protox *protoprotox[] = { protox, ipxprotox, atalkprotox, 199 #ifdef NS 200 nsprotox, 201 #endif 202 #ifdef ISO 203 isoprotox, 204 #endif 205 NULL }; 206 207 static void printproto __P((struct protox *, char *)); 208 static void usage __P((void)); 209 static struct protox *name2protox __P((char *)); 210 static struct protox *knownname __P((char *)); 211 212 static kvm_t *kvmd; 213 char *nlistf = NULL, *memf = NULL; 214 215 int 216 main(argc, argv) 217 int argc; 218 char *argv[]; 219 { 220 register struct protoent *p; 221 register struct protox *tp; /* for printing cblocks & stats */ 222 int ch; 223 224 af = AF_UNSPEC; 225 226 while ((ch = getopt(argc, argv, "Aabdf:ghI:iM:mN:np:rstuw:")) != -1) 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 #ifdef NS 242 if (strcmp(optarg, "ns") == 0) 243 af = AF_NS; 244 else 245 #endif 246 if (strcmp(optarg, "ipx") == 0) 247 af = AF_IPX; 248 else if (strcmp(optarg, "inet") == 0) 249 af = AF_INET; 250 else if (strcmp(optarg, "unix") == 0) 251 af = AF_UNIX; 252 else if (strcmp(optarg, "atalk") == 0) 253 af = AF_APPLETALK; 254 #ifdef ISO 255 else if (strcmp(optarg, "iso") == 0) 256 af = AF_ISO; 257 #endif 258 else { 259 errx(1, "%s: unknown address family", optarg); 260 } 261 break; 262 case 'g': 263 gflag = 1; 264 break; 265 case 'I': { 266 char *cp; 267 268 iflag = 1; 269 for (cp = interface = optarg; isalpha(*cp); cp++) 270 continue; 271 unit = atoi(cp); 272 break; 273 } 274 case 'i': 275 iflag = 1; 276 break; 277 case 'M': 278 memf = optarg; 279 break; 280 case 'm': 281 mflag = 1; 282 break; 283 case 'N': 284 nlistf = optarg; 285 break; 286 case 'n': 287 nflag = 1; 288 break; 289 case 'p': 290 if ((tp = name2protox(optarg)) == NULL) { 291 errx(1, 292 "%s: unknown or uninstrumented protocol", 293 optarg); 294 } 295 pflag = 1; 296 break; 297 case 'r': 298 rflag = 1; 299 break; 300 case 's': 301 ++sflag; 302 break; 303 case 't': 304 tflag = 1; 305 break; 306 case 'u': 307 af = AF_UNIX; 308 break; 309 case 'w': 310 interval = atoi(optarg); 311 iflag = 1; 312 break; 313 case '?': 314 default: 315 usage(); 316 } 317 argv += optind; 318 argc -= optind; 319 320 #define BACKWARD_COMPATIBILITY 321 #ifdef BACKWARD_COMPATIBILITY 322 if (*argv) { 323 if (isdigit(**argv)) { 324 interval = atoi(*argv); 325 if (interval <= 0) 326 usage(); 327 ++argv; 328 iflag = 1; 329 } 330 if (*argv) { 331 nlistf = *argv; 332 if (*++argv) 333 memf = *argv; 334 } 335 } 336 #endif 337 338 /* 339 * Discard setgid privileges if not the running kernel so that bad 340 * guys can't print interesting stuff from kernel memory. 341 */ 342 if (nlistf != NULL || memf != NULL) 343 setgid(getgid()); 344 345 if (mflag) { 346 mbpr(); 347 exit(0); 348 } 349 if (pflag) { 350 if (!tp->pr_stats) { 351 printf("%s: no stats routine\n", tp->pr_name); 352 exit(0); 353 } 354 if (tp->pr_usesysctl) { 355 (*tp->pr_stats)(tp->pr_usesysctl, tp->pr_name); 356 } else { 357 kread(0, 0, 0); 358 (*tp->pr_stats)(nl[tp->pr_sindex].n_value, 359 tp->pr_name); 360 } 361 exit(0); 362 } 363 #if 0 364 /* 365 * Keep file descriptors open to avoid overhead 366 * of open/close on each call to get* routines. 367 */ 368 sethostent(1); 369 setnetent(1); 370 #else 371 /* 372 * This does not make sense any more with DNS being default over 373 * the files. Doing a setXXXXent(1) causes a tcp connection to be 374 * used for the queries, which is slower. 375 */ 376 #endif 377 if (iflag) { 378 kread(0, 0, 0); 379 intpr(interval, nl[N_IFNET].n_value); 380 exit(0); 381 } 382 if (rflag) { 383 kread(0, 0, 0); 384 if (sflag) 385 rt_stats(nl[N_RTSTAT].n_value); 386 else 387 routepr(nl[N_RTREE].n_value); 388 exit(0); 389 } 390 if (gflag) { 391 kread(0, 0, 0); 392 if (sflag) 393 mrt_stats(nl[N_MRTPROTO].n_value, 394 nl[N_MRTSTAT].n_value); 395 else 396 mroutepr(nl[N_MRTPROTO].n_value, 397 nl[N_MFCTABLE].n_value, 398 nl[N_VIFTABLE].n_value); 399 exit(0); 400 } 401 if (af == AF_INET || af == AF_UNSPEC) { 402 setprotoent(1); 403 setservent(1); 404 /* ugh, this is O(MN) ... why do we do this? */ 405 while ((p = getprotoent())) { 406 for (tp = protox; tp->pr_name; tp++) 407 if (strcmp(tp->pr_name, p->p_name) == 0) 408 break; 409 if (tp->pr_name == 0 || tp->pr_wanted == 0) 410 continue; 411 printproto(tp, p->p_name); 412 } 413 endprotoent(); 414 } 415 if (af == AF_IPX || af == AF_UNSPEC) 416 for (tp = ipxprotox; tp->pr_name; tp++) 417 printproto(tp, tp->pr_name); 418 if (af == AF_APPLETALK || af == AF_UNSPEC) 419 for (tp = atalkprotox; tp->pr_name; tp++) 420 printproto(tp, tp->pr_name); 421 #ifdef NS 422 if (af == AF_NS || af == AF_UNSPEC) 423 for (tp = nsprotox; tp->pr_name; tp++) 424 printproto(tp, tp->pr_name); 425 #endif 426 #ifdef ISO 427 if (af == AF_ISO || af == AF_UNSPEC) 428 for (tp = isoprotox; tp->pr_name; tp++) 429 printproto(tp, tp->pr_name); 430 #endif 431 if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag) 432 unixpr(); 433 exit(0); 434 } 435 436 /* 437 * Print out protocol statistics or control blocks (per sflag). 438 * If the interface was not specifically requested, and the symbol 439 * is not in the namelist, ignore this one. 440 */ 441 static void 442 printproto(tp, name) 443 register struct protox *tp; 444 char *name; 445 { 446 void (*pr)(); 447 u_long off; 448 449 if (sflag) { 450 pr = tp->pr_stats; 451 off = tp->pr_usesysctl ? tp->pr_usesysctl 452 : nl[tp->pr_sindex].n_value; 453 } else { 454 pr = tp->pr_cblocks; 455 off = tp->pr_usesysctl ? tp->pr_usesysctl 456 : nl[tp->pr_index].n_value; 457 } 458 if (pr != NULL && (off || af != AF_UNSPEC)) 459 (*pr)(off, name); 460 } 461 462 /* 463 * Read kernel memory, return 0 on success. 464 */ 465 int 466 kread(addr, buf, size) 467 u_long addr; 468 char *buf; 469 int size; 470 { 471 if (kvmd == 0) { 472 /* 473 * XXX. 474 */ 475 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf); 476 if (kvmd != NULL) { 477 if (kvm_nlist(kvmd, nl) < 0) { 478 if(nlistf) 479 errx(1, "%s: kvm_nlist: %s", nlistf, 480 kvm_geterr(kvmd)); 481 else 482 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd)); 483 } 484 485 if (nl[0].n_type == 0) { 486 if(nlistf) 487 errx(1, "%s: no namelist", nlistf); 488 else 489 errx(1, "no namelist"); 490 } 491 } else { 492 warnx("kvm not available"); 493 return(-1); 494 } 495 } 496 if (!buf) 497 return (0); 498 if (kvm_read(kvmd, addr, buf, size) != size) { 499 warnx("%s", kvm_geterr(kvmd)); 500 return (-1); 501 } 502 return (0); 503 } 504 505 char * 506 plural(n) 507 int n; 508 { 509 return (n != 1 ? "s" : ""); 510 } 511 512 char * 513 plurales(n) 514 int n; 515 { 516 return (n != 1 ? "es" : ""); 517 } 518 519 /* 520 * Find the protox for the given "well-known" name. 521 */ 522 static struct protox * 523 knownname(name) 524 char *name; 525 { 526 struct protox **tpp, *tp; 527 528 for (tpp = protoprotox; *tpp; tpp++) 529 for (tp = *tpp; tp->pr_name; tp++) 530 if (strcmp(tp->pr_name, name) == 0) 531 return (tp); 532 return (NULL); 533 } 534 535 /* 536 * Find the protox corresponding to name. 537 */ 538 static struct protox * 539 name2protox(name) 540 char *name; 541 { 542 struct protox *tp; 543 char **alias; /* alias from p->aliases */ 544 struct protoent *p; 545 546 /* 547 * Try to find the name in the list of "well-known" names. If that 548 * fails, check if name is an alias for an Internet protocol. 549 */ 550 if ((tp = knownname(name))) 551 return (tp); 552 553 setprotoent(1); /* make protocol lookup cheaper */ 554 while ((p = getprotoent())) { 555 /* assert: name not same as p->name */ 556 for (alias = p->p_aliases; *alias; alias++) 557 if (strcmp(name, *alias) == 0) { 558 endprotoent(); 559 return (knownname(p->p_name)); 560 } 561 } 562 endprotoent(); 563 return (NULL); 564 } 565 566 static void 567 usage() 568 { 569 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n", 570 "usage: netstat [-Aan] [-f address_family] [-M core] [-N system]", 571 " netstat [-bdghimnrs] [-f address_family] [-M core] [-N system]", 572 " netstat [-bdn] [-I interface] [-M core] [-N system] [-w wait]", 573 " netstat [-M core] [-N system] [-p protocol]"); 574 exit(1); 575 } 576 577 void 578 trimdomain(cp) 579 char *cp; 580 { 581 static char domain[MAXHOSTNAMELEN + 1]; 582 static int first = 1; 583 char *s; 584 585 if (first) { 586 first = 0; 587 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 588 (s = strchr(domain, '.'))) 589 (void) strcpy(domain, s + 1); 590 else 591 domain[0] = 0; 592 } 593 594 if (domain[0]) { 595 while ((cp = strchr(cp, '.'))) { 596 if (!strcasecmp(cp + 1, domain)) { 597 *cp = 0; /* hit it */ 598 break; 599 } else { 600 cp++; 601 } 602 } 603 } 604 } 605 606