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 35char 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 42static char sccsid[] = "@(#)main.c 8.4 (Berkeley) 3/1/94"; 43#endif 44static const char rcsid[] =
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45 "$FreeBSD: head/usr.bin/netstat/main.c 52419 1999-10-21 09:06:11Z julian $";
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45 "$FreeBSD: head/usr.bin/netstat/main.c 54263 1999-12-07 17:39:16Z shin $"; |
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 <netgraph/ng_socket.h> 56 57#include <ctype.h> 58#include <err.h> 59#include <errno.h> 60#include <kvm.h> 61#include <limits.h> 62#include <netdb.h> 63#include <nlist.h> 64#include <paths.h> 65#include <stdio.h> 66#include <stdlib.h> 67#include <string.h> 68#include <unistd.h> 69#include "netstat.h" 70 71static struct nlist nl[] = { 72#define N_IFNET 0 73 { "_ifnet" }, 74#define N_IMP 1 75 { "_imp_softc" }, 76#define N_RTSTAT 2 77 { "_rtstat" }, 78#define N_UNIXSW 3 79 { "_localsw" }, 80#define N_IDP 4 81 { "_nspcb"}, 82#define N_IDPSTAT 5 83 { "_idpstat"}, 84#define N_SPPSTAT 6 85 { "_spp_istat"}, 86#define N_NSERR 7 87 { "_ns_errstat"}, 88#define N_CLNPSTAT 8 89 { "_clnp_stat"}, 90#define IN_NOTUSED 9 91 { "_tp_inpcb" }, 92#define ISO_TP 10 93 { "_tp_refinfo" }, 94#define N_TPSTAT 11 95 { "_tp_stat" }, 96#define N_ESISSTAT 12 97 { "_esis_stat"}, 98#define N_NIMP 13 99 { "_nimp"}, 100#define N_RTREE 14 101 { "_rt_tables"}, 102#define N_CLTP 15 103 { "_cltb"}, 104#define N_CLTPSTAT 16 105 { "_cltpstat"}, 106#define N_NFILE 17 107 { "_nfile" }, 108#define N_FILE 18 109 { "_file" }, 110#define N_MRTSTAT 19 111 { "_mrtstat" }, 112#define N_MFCTABLE 20 113 { "_mfctable" }, 114#define N_VIFTABLE 21 115 { "_viftable" }, 116#define N_IPX 22 117 { "_ipxpcb"}, 118#define N_IPXSTAT 23 119 { "_ipxstat"}, 120#define N_SPXSTAT 24 121 { "_spx_istat"}, 122#define N_DDPSTAT 25 123 { "_ddpstat"}, 124#define N_DDPCB 26 125 { "_ddpcb"}, 126#define N_NGSOCKS 27 127 { "_ngsocklist"},
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128#define N_IP6STAT 28 129 { "_ip6stat" }, 130#define N_ICMP6STAT 29 131 { "_icmp6stat" }, 132#ifdef notyet 133#define N_IPSECSTAT 30 134 { "_ipsecstat" }, 135#define N_IPSEC6STAT 31 136 { "_ipsec6stat" }, 137#define N_PIM6STAT 32 138 { "_pim6stat" }, 139#define N_MRT6PROTO 33 140 { "_ip6_mrtproto" }, 141#define N_MRT6STAT 34 142 { "_mrt6stat" }, 143#define N_MF6CTABLE 35 144 { "_mf6ctable" }, 145#define N_MIF6TABLE 36 146 { "_mif6table" }, 147#endif |
148 { "" }, 149}; 150 151struct protox { 152 u_char pr_index; /* index into nlist of cb head */ 153 u_char pr_sindex; /* index into nlist of stat block */ 154 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 155 void (*pr_cblocks)(); /* control blocks printing routine */ 156 void (*pr_stats)(); /* statistics printing routine */
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157 void (*pr_istats)(); /* per/if statistics printing routine */ |
158 char *pr_name; /* well-known name */ 159 int pr_usesysctl; /* true if we use sysctl, not kvm */ 160} protox[] = { 161 { -1, -1, 1, protopr,
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141 tcp_stats, "tcp", IPPROTO_TCP },
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162 tcp_stats, NULL, "tcp", IPPROTO_TCP }, |
163 { -1, -1, 1, protopr,
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143 udp_stats, "udp", IPPROTO_UDP },
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164 udp_stats, NULL, "udp", IPPROTO_UDP }, |
165 { -1, -1, 1, protopr,
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145 NULL, "divert", IPPROTO_DIVERT },
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166 NULL, NULL, "divert",IPPROTO_DIVERT }, |
167 { -1, -1, 1, protopr,
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147 ip_stats, "ip", IPPROTO_RAW },
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168 ip_stats, NULL, "ip", IPPROTO_RAW }, |
169 { -1, -1, 1, protopr,
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149 icmp_stats, "icmp", IPPROTO_ICMP },
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170 icmp_stats, NULL, "icmp", IPPROTO_ICMP }, |
171 { -1, -1, 1, protopr,
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151 igmp_stats, "igmp", IPPROTO_IGMP },
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172 igmp_stats, NULL, "igmp", IPPROTO_IGMP }, 173#ifdef IPSEC 174 { -1, N_IPSECSTAT, 1, 0, 175 ipsec_stats, NULL, "ipsec", 0}, 176#endif |
177 { -1, -1, 1, protopr,
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153 bdg_stats, "bdg", 1 /* bridging... */ },
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178 bdg_stats, NULL, "bdg", 1 /* bridging... */ }, |
179 { -1, -1, 0, 0,
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155 0, 0 }
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180 0, NULL, 0 } |
181}; 182
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183#ifdef INET6 184struct protox ip6protox[] = { 185 { -1, -1, 1, protopr, 186 tcp_stats, NULL, "tcp", IPPROTO_TCP }, 187 { -1, -1, 1, protopr, 188 udp_stats, NULL, "udp", IPPROTO_UDP }, 189 { -1, N_IP6STAT, 1, 0, 190 ip6_stats, ip6_ifstats, "ip6", 0 }, 191 { -1, N_ICMP6STAT, 1, 0, 192 icmp6_stats, icmp6_ifstats, "icmp6",0 }, 193#ifdef IPSEC 194 { -1, N_IPSEC6STAT, 1, 0, 195 ipsec_stats, NULL, "ipsec6",0 }, 196#endif 197#ifdef notyet 198 { -1, N_PIM6STAT, 1, 0, 199 pim6_stats, NULL, "pim6", 0 }, 200#endif 201 { -1, -1, 1, protopr, 202 bdg_stats, NULL, "bdg", 1 /* bridging... */ }, 203 { -1, -1, 0, 0, 204 0, NULL, 0, 0 } 205}; 206#endif /*INET6*/ 207 |
208struct protox atalkprotox[] = { 209 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr,
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160 ddp_stats, "ddp" },
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210 ddp_stats, NULL, "ddp" }, |
211 { -1, -1, 0, 0,
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162 0, 0 }
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212 0, NULL, 0 } |
213}; 214 215struct protox netgraphprotox[] = { 216 { N_NGSOCKS, -1, 1, netgraphprotopr,
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167 NULL, "ctrl" },
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217 NULL, NULL, "ctrl" }, |
218 { N_NGSOCKS, -1, 1, netgraphprotopr,
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169 NULL, "data" },
170 { -1, -1, 0, 0,
171 0, 0 }
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219 NULL, NULL, "data" }, 220 { -1, NULL, 0, 0, 221 0, NULL, 0 } |
222}; 223 224struct protox ipxprotox[] = { 225 { N_IPX, N_IPXSTAT, 1, ipxprotopr,
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176 ipx_stats, "ipx", 0 },
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226 ipx_stats, NULL, "ipx", 0 }, |
227 { N_IPX, N_SPXSTAT, 1, ipxprotopr,
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178 spx_stats, "spx", 0 },
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228 spx_stats, NULL, "spx", 0 }, |
229 { -1, -1, 0, 0,
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180 0, 0, 0 }
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230 0, NULL, 0, 0 } |
231}; 232 233#ifdef NS 234struct protox nsprotox[] = { 235 { N_IDP, N_IDPSTAT, 1, nsprotopr,
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186 idp_stats, "idp" },
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236 idp_stats, NULL, "idp" }, |
237 { N_IDP, N_SPPSTAT, 1, nsprotopr,
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188 spp_stats, "spp" },
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238 spp_stats, NULL, "spp" }, |
239 { -1, N_NSERR, 1, 0,
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190 nserr_stats, "ns_err" },
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240 nserr_stats, NULL, "ns_err" }, |
241 { -1, -1, 0, 0,
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192 0, 0 }
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242 0, NULL, 0 } |
243}; 244#endif 245 246#ifdef ISO 247struct protox isoprotox[] = { 248 { ISO_TP, N_TPSTAT, 1, iso_protopr,
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199 tp_stats, "tp" },
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249 tp_stats, NULL, "tp" }, |
250 { N_CLTP, N_CLTPSTAT, 1, iso_protopr,
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201 cltp_stats, "cltp" },
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251 cltp_stats, NULL, "cltp" }, |
252 { -1, N_CLNPSTAT, 1, 0,
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203 clnp_stats, "clnp"},
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253 clnp_stats, NULL, "clnp"}, |
254 { -1, N_ESISSTAT, 1, 0,
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205 esis_stats, "esis"},
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255 esis_stats, NULL, "esis"}, |
256 { -1, -1, 0, 0,
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207 0, 0 }
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257 0, NULL, 0 } |
258}; 259#endif 260
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211struct protox *protoprotox[] = { protox, ipxprotox, atalkprotox,
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261struct protox *protoprotox[] = { 262 protox, 263#ifdef INET6 264 ip6protox, 265#endif 266 ipxprotox, atalkprotox, |
267#ifdef NS 268 nsprotox, 269#endif 270#ifdef ISO 271 isoprotox, 272#endif 273 NULL }; 274 275static void printproto __P((struct protox *, char *)); 276static void usage __P((void)); 277static struct protox *name2protox __P((char *)); 278static struct protox *knownname __P((char *)); 279 280static kvm_t *kvmd; 281char *nlistf = NULL, *memf = NULL; 282 283int 284main(argc, argv) 285 int argc; 286 char *argv[]; 287{
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233 register struct protoent *p;
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288 register struct protox *tp = NULL; /* for printing cblocks & stats */ 289 int ch; 290 291 af = AF_UNSPEC; 292
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239 while ((ch = getopt(argc, argv, "Aabdf:ghI:iM:mN:np:rstuw:")) != -1)
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293 while ((ch = getopt(argc, argv, "Aabdf:ghI:liM:mN:np:rstuw:")) != -1) |
294 switch(ch) { 295 case 'A': 296 Aflag = 1; 297 break; 298 case 'a': 299 aflag = 1; 300 break; 301 case 'b': 302 bflag = 1; 303 break; 304 case 'd': 305 dflag = 1; 306 break; 307 case 'f': 308#ifdef NS 309 if (strcmp(optarg, "ns") == 0) 310 af = AF_NS; 311 else 312#endif 313 if (strcmp(optarg, "ipx") == 0) 314 af = AF_IPX; 315 else if (strcmp(optarg, "inet") == 0) 316 af = AF_INET;
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317#ifdef INET6 318 else if (strcmp(optarg, "inet6") == 0) 319 af = AF_INET6; 320#endif /*INET6*/ |
321 else if (strcmp(optarg, "unix") == 0) 322 af = AF_UNIX; 323 else if (strcmp(optarg, "atalk") == 0) 324 af = AF_APPLETALK; 325 else if (strcmp(optarg, "ng") == 0 326 || strcmp(optarg, "netgraph") == 0) 327 af = AF_NETGRAPH; 328#ifdef ISO 329 else if (strcmp(optarg, "iso") == 0) 330 af = AF_ISO; 331#endif 332 else { 333 errx(1, "%s: unknown address family", optarg); 334 } 335 break; 336 case 'g': 337 gflag = 1; 338 break; 339 case 'I': { 340 char *cp; 341 342 iflag = 1; 343 for (cp = interface = optarg; isalpha(*cp); cp++) 344 continue; 345 unit = atoi(cp); 346 break; 347 } 348 case 'i': 349 iflag = 1; 350 break;
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351 case 'l': 352 lflag = 1; 353 break; |
354 case 'M': 355 memf = optarg; 356 break; 357 case 'm': 358 mflag = 1; 359 break; 360 case 'N': 361 nlistf = optarg; 362 break; 363 case 'n': 364 nflag = 1; 365 break; 366 case 'p': 367 if ((tp = name2protox(optarg)) == NULL) { 368 errx(1, 369 "%s: unknown or uninstrumented protocol", 370 optarg); 371 } 372 pflag = 1; 373 break; 374 case 'r': 375 rflag = 1; 376 break; 377 case 's': 378 ++sflag; 379 break; 380 case 't': 381 tflag = 1; 382 break; 383 case 'u': 384 af = AF_UNIX; 385 break; 386 case 'w': 387 interval = atoi(optarg); 388 iflag = 1; 389 break; 390 case '?': 391 default: 392 usage(); 393 } 394 argv += optind; 395 argc -= optind; 396 397#define BACKWARD_COMPATIBILITY 398#ifdef BACKWARD_COMPATIBILITY 399 if (*argv) { 400 if (isdigit(**argv)) { 401 interval = atoi(*argv); 402 if (interval <= 0) 403 usage(); 404 ++argv; 405 iflag = 1; 406 } 407 if (*argv) { 408 nlistf = *argv; 409 if (*++argv) 410 memf = *argv; 411 } 412 } 413#endif 414 415 /* 416 * Discard setgid privileges if not the running kernel so that bad 417 * guys can't print interesting stuff from kernel memory. 418 */ 419 if (nlistf != NULL || memf != NULL) 420 setgid(getgid()); 421 422 if (mflag) { 423 mbpr(); 424 exit(0); 425 } 426 if (pflag) {
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427 if (iflag && tp->pr_istats) { 428 kread(0, 0, 0); 429 intpr(interval, nl[N_IFNET].n_value, tp->pr_istats); 430 exit(0); 431 } |
432 if (!tp->pr_stats) { 433 printf("%s: no stats routine\n", tp->pr_name); 434 exit(0); 435 } 436 if (tp->pr_usesysctl) { 437 (*tp->pr_stats)(tp->pr_usesysctl, tp->pr_name); 438 } else { 439 kread(0, 0, 0); 440 (*tp->pr_stats)(nl[tp->pr_sindex].n_value, 441 tp->pr_name); 442 } 443 exit(0); 444 } 445#if 0 446 /* 447 * Keep file descriptors open to avoid overhead 448 * of open/close on each call to get* routines. 449 */ 450 sethostent(1); 451 setnetent(1); 452#else 453 /* 454 * This does not make sense any more with DNS being default over 455 * the files. Doing a setXXXXent(1) causes a tcp connection to be 456 * used for the queries, which is slower. 457 */ 458#endif 459 if (iflag) {
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460 if (af != AF_UNSPEC) 461 goto protostat; 462 |
463 kread(0, 0, 0);
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395 intpr(interval, nl[N_IFNET].n_value);
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464 intpr(interval, nl[N_IFNET].n_value, NULL); |
465 exit(0); 466 } 467 if (rflag) { 468 kread(0, 0, 0); 469 if (sflag) 470 rt_stats(nl[N_RTSTAT].n_value); 471 else 472 routepr(nl[N_RTREE].n_value); 473 exit(0); 474 } 475 if (gflag) { 476 kread(0, 0, 0);
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408 if (sflag)
409 mrt_stats(nl[N_MRTSTAT].n_value);
410 else
411 mroutepr(nl[N_MFCTABLE].n_value,
412 nl[N_VIFTABLE].n_value);
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477 if (sflag) { 478 if (af == AF_INET || af == AF_UNSPEC) 479 mrt_stats(nl[N_MRTSTAT].n_value); 480#ifdef INET6 481#ifdef notyet 482 if (af == AF_INET6 || af == AF_UNSPEC) 483 mrt6_stats(nl[N_MRT6STAT].n_value); 484#endif 485#endif 486 } else { 487 if (af == AF_INET || af == AF_UNSPEC) 488 mroutepr(nl[N_MFCTABLE].n_value, 489 nl[N_VIFTABLE].n_value); 490#ifdef INET6 491#ifdef notyet 492 if (af == AF_INET6 || af == AF_UNSPEC) 493 mroute6pr(nl[N_MF6CTABLE].n_value, 494 nl[N_MIF6TABLE].n_value); 495#endif 496#endif 497 } |
498 exit(0); 499 }
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415 if (af == AF_INET || af == AF_UNSPEC) {
416 setprotoent(1);
417 setservent(1);
418 /* ugh, this is O(MN) ... why do we do this? */
419 while ((p = getprotoent())) {
420 for (tp = protox; tp->pr_name; tp++)
421 if (strcmp(tp->pr_name, p->p_name) == 0)
422 break;
423 if (tp->pr_name == 0 || tp->pr_wanted == 0)
424 continue;
425 printproto(tp, p->p_name);
426 }
427 endprotoent();
428 }
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500 501 protostat: 502 kread(0, 0, 0); 503 if (af == AF_INET || af == AF_UNSPEC) 504 for (tp = protox; tp->pr_name; tp++) 505 printproto(tp, tp->pr_name); 506#ifdef INET6 507 if (af == AF_INET6 || af == AF_UNSPEC) 508 for (tp = ip6protox; tp->pr_name; tp++) 509 printproto(tp, tp->pr_name); 510#endif /*INET6*/ |
511 if (af == AF_IPX || af == AF_UNSPEC) { 512 kread(0, 0, 0); 513 for (tp = ipxprotox; tp->pr_name; tp++) 514 printproto(tp, tp->pr_name); 515 } 516 if (af == AF_APPLETALK || af == AF_UNSPEC) 517 for (tp = atalkprotox; tp->pr_name; tp++) 518 printproto(tp, tp->pr_name); 519 if (af == AF_NETGRAPH || af == AF_UNSPEC) 520 for (tp = netgraphprotox; tp->pr_name; tp++) 521 printproto(tp, tp->pr_name); 522#ifdef NS 523 if (af == AF_NS || af == AF_UNSPEC) 524 for (tp = nsprotox; tp->pr_name; tp++) 525 printproto(tp, tp->pr_name); 526#endif 527#ifdef ISO 528 if (af == AF_ISO || af == AF_UNSPEC) 529 for (tp = isoprotox; tp->pr_name; tp++) 530 printproto(tp, tp->pr_name); 531#endif 532 if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag) 533 unixpr(); 534 exit(0); 535} 536 537/* 538 * Print out protocol statistics or control blocks (per sflag). 539 * If the interface was not specifically requested, and the symbol 540 * is not in the namelist, ignore this one. 541 */ 542static void 543printproto(tp, name) 544 register struct protox *tp; 545 char *name; 546{ 547 void (*pr)(); 548 u_long off; 549 550 if (sflag) {
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469 pr = tp->pr_stats;
470 off = tp->pr_usesysctl ? tp->pr_usesysctl
471 : nl[tp->pr_sindex].n_value;
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551 if (iflag) { 552 if (tp->pr_istats) 553 intpr(interval, nl[N_IFNET].n_value, 554 tp->pr_istats); 555 return; 556 } 557 else { 558 pr = tp->pr_stats; 559 off = tp->pr_usesysctl ? tp->pr_usesysctl 560 : nl[tp->pr_sindex].n_value; 561 } |
562 } else { 563 pr = tp->pr_cblocks; 564 off = tp->pr_usesysctl ? tp->pr_usesysctl 565 : nl[tp->pr_index].n_value; 566 } 567 if (pr != NULL && (off || af != AF_UNSPEC))
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478 (*pr)(off, name);
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568 (*pr)(off, name, af); |
569} 570 571/* 572 * Read kernel memory, return 0 on success. 573 */ 574int 575kread(addr, buf, size) 576 u_long addr; 577 char *buf; 578 int size; 579{ 580 if (kvmd == 0) { 581 /* 582 * XXX. 583 */ 584 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf); 585 if (kvmd != NULL) { 586 if (kvm_nlist(kvmd, nl) < 0) { 587 if(nlistf) 588 errx(1, "%s: kvm_nlist: %s", nlistf, 589 kvm_geterr(kvmd)); 590 else 591 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd)); 592 } 593 594 if (nl[0].n_type == 0) { 595 if(nlistf) 596 errx(1, "%s: no namelist", nlistf); 597 else 598 errx(1, "no namelist"); 599 } 600 } else { 601 warnx("kvm not available"); 602 return(-1); 603 } 604 } 605 if (!buf) 606 return (0); 607 if (kvm_read(kvmd, addr, buf, size) != size) { 608 warnx("%s", kvm_geterr(kvmd)); 609 return (-1); 610 } 611 return (0); 612} 613 614char * 615plural(n) 616 int n; 617{ 618 return (n != 1 ? "s" : ""); 619} 620 621char * 622plurales(n) 623 int n; 624{ 625 return (n != 1 ? "es" : ""); 626} 627 628/* 629 * Find the protox for the given "well-known" name. 630 */ 631static struct protox * 632knownname(name) 633 char *name; 634{ 635 struct protox **tpp, *tp; 636 637 for (tpp = protoprotox; *tpp; tpp++) 638 for (tp = *tpp; tp->pr_name; tp++) 639 if (strcmp(tp->pr_name, name) == 0) 640 return (tp); 641 return (NULL); 642} 643 644/* 645 * Find the protox corresponding to name. 646 */ 647static struct protox * 648name2protox(name) 649 char *name; 650{ 651 struct protox *tp; 652 char **alias; /* alias from p->aliases */ 653 struct protoent *p; 654 655 /* 656 * Try to find the name in the list of "well-known" names. If that 657 * fails, check if name is an alias for an Internet protocol. 658 */
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569 if ((tp = knownname(name)))
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659 if ((tp = knownname(name)) != NULL) |
660 return (tp); 661 662 setprotoent(1); /* make protocol lookup cheaper */
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573 while ((p = getprotoent())) {
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663 while ((p = getprotoent()) != NULL) { |
664 /* assert: name not same as p->name */ 665 for (alias = p->p_aliases; *alias; alias++) 666 if (strcmp(name, *alias) == 0) { 667 endprotoent(); 668 return (knownname(p->p_name)); 669 } 670 } 671 endprotoent(); 672 return (NULL); 673} 674 675static void 676usage() 677{ 678 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n", 679"usage: netstat [-Aan] [-f address_family] [-M core] [-N system]", 680" netstat [-abdghimnrs] [-f address_family] [-M core] [-N system]", 681" netstat [-bdn] [-I interface] [-M core] [-N system] [-w wait]", 682" netstat [-M core] [-N system] [-p protocol]"); 683 exit(1); 684} 685 686void 687trimdomain(cp) 688 char *cp; 689{ 690 static char domain[MAXHOSTNAMELEN + 1]; 691 static int first = 1; 692 char *s; 693 694 if (first) { 695 first = 0; 696 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 697 (s = strchr(domain, '.'))) 698 (void) strcpy(domain, s + 1); 699 else 700 domain[0] = 0; 701 } 702 703 if (domain[0]) { 704 while ((cp = strchr(cp, '.'))) { 705 if (!strcasecmp(cp + 1, domain)) { 706 *cp = 0; /* hit it */ 707 break; 708 } else { 709 cp++; 710 } 711 } 712 } 713} 714
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