vtw.c revision 1.7
1 /* $NetBSD: vtw.c,v 1.7 2013/10/18 20:26:45 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2011 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Coyote Point Systems, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 /* 32 * Copyright (c) 1983, 1988, 1993 33 * The Regents of the University of California. All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 1. Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * 2. Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in the 42 * documentation and/or other materials provided with the distribution. 43 * 3. Neither the name of the University nor the names of its contributors 44 * may be used to endorse or promote products derived from this software 45 * without specific prior written permission. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 48 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 50 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 51 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 52 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 53 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 54 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 55 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 56 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 57 * SUCH DAMAGE. 58 */ 59 60 #include <sys/cdefs.h> 61 #ifndef lint 62 #if 0 63 static char sccsid[] = "from: @(#)inet.c 8.4 (Berkeley) 4/20/94"; 64 #else 65 __RCSID("$NetBSD: vtw.c,v 1.7 2013/10/18 20:26:45 christos Exp $"); 66 #endif 67 #endif /* not lint */ 68 69 #define _CALLOUT_PRIVATE /* for defs in sys/callout.h */ 70 71 #include <sys/param.h> 72 #include <sys/queue.h> 73 #include <sys/socket.h> 74 #include <sys/socketvar.h> 75 #include <sys/mbuf.h> 76 #include <sys/protosw.h> 77 #include <sys/sysctl.h> 78 79 #include <net/if_arp.h> 80 #include <net/route.h> 81 #include <netinet/in.h> 82 #include <netinet/in_systm.h> 83 #include <netinet/ip.h> 84 #include <netinet/in_pcb.h> 85 #include <netinet/ip_icmp.h> 86 87 #ifdef INET6 88 #include <netinet/ip6.h> 89 #endif 90 91 #include <netinet/icmp_var.h> 92 #include <netinet/igmp_var.h> 93 #include <netinet/ip_var.h> 94 #include <netinet/pim_var.h> 95 #include <netinet/tcp.h> 96 #include <netinet/tcpip.h> 97 #include <netinet/tcp_seq.h> 98 #include <netinet/tcp_fsm.h> 99 #include <netinet/tcp_timer.h> 100 #include <netinet/tcp_var.h> 101 #include <netinet/tcp_debug.h> 102 #include <netinet/udp.h> 103 #include <netinet/ip_carp.h> 104 #include <netinet/udp_var.h> 105 #include <netinet/tcp_vtw.h> 106 107 #include <arpa/inet.h> 108 #include <kvm.h> 109 #include <netdb.h> 110 #include <stdio.h> 111 #include <string.h> 112 #include <unistd.h> 113 #include <stdlib.h> 114 #include <err.h> 115 #include "netstat.h" 116 #include "vtw.h" 117 #include "prog_ops.h" 118 119 static void snarf(const void *, void *, size_t); 120 static void *lookup(const char *); 121 static void process_vtw(const vtw_ctl_t *, void (*)(const vtw_t *)); 122 123 static void 124 snarf(const void *addr, void *buf, size_t len) 125 { 126 size_t cc; 127 128 memset(buf, 0, len); 129 130 cc = kvm_read(get_kvmd(), (unsigned long) addr, buf, len); 131 132 if (cc != len) { 133 warnx("%s: short read at %p, len %zx cc %zx\n", __func__, addr, 134 len, cc); 135 } 136 } 137 138 static void * 139 lookup(const char *name) 140 { 141 kvm_t *k; 142 struct nlist nl[2]; 143 144 nl[0].n_name = name; 145 nl[0].n_value = 0; 146 nl[1].n_name = NULL; 147 148 if ((k = get_kvmd()) == NULL) { 149 if (Vflag) 150 errx(EXIT_FAILURE, "kvm not available"); 151 return NULL; 152 } 153 switch (kvm_nlist(k, &nl[0])) { 154 case -1: 155 err(EXIT_FAILURE, "kvm_nlist"); 156 break; 157 158 case 0: 159 return (void *)nl[0].n_value; 160 161 default: 162 if (Vflag) 163 errx(EXIT_FAILURE, "%s missing in symbol table", name); 164 break; 165 } 166 167 return NULL; 168 } 169 170 void 171 timebase(struct timeval *tv) 172 { 173 void *p; 174 struct bintime timebasebin; 175 176 p = lookup("timebasebin"); 177 if (!p) 178 return; 179 snarf(p, &timebasebin, sizeof(timebasebin)); 180 bintime2timeval(&timebasebin, tv); 181 } 182 183 static void 184 process_vtw(const vtw_ctl_t * ctl, void (*print)(const vtw_t *)) 185 { 186 vtw_t *vp; 187 188 for (vp = ctl->base.v; vp && vp <= ctl->lim.v;) { 189 190 (*print)(vp); 191 192 if (ctl->is_v4) { 193 vtw_v4_t *v4 = (vtw_v4_t *)vp; 194 195 vp = &(++v4)->common; 196 } else if (ctl->is_v6) { 197 vtw_v6_t *v6 = (vtw_v6_t *)vp; 198 199 vp = &(++v6)->common; 200 } 201 } 202 } 203 204 void 205 show_vtw_stats(void) 206 { 207 vtw_stats_t stats; 208 void *p; 209 210 if (!Vflag) 211 return; 212 213 if ((p = lookup("vtw_stats")) == NULL) 214 return; 215 snarf(p, &stats, sizeof(stats)); 216 217 printf("\t\t%" PRIu64 " inserts\n", stats.ins); 218 printf("\t\t%" PRIu64 " deletes\n", stats.del); 219 printf("\t\t%" PRIu64 " assassinations\n", stats.kill); 220 printf("\tvestigial time-wait lookup_connect\n"); 221 printf("\t\t%" PRIu64 " look\n", stats.look[0]); 222 printf("\t\t%" PRIu64 " hit\n", stats.hit[0]); 223 printf("\t\t%" PRIu64 " miss\n", stats.miss[0]); 224 printf("\t\t%" PRIu64 " probe\n", stats.probe[0]); 225 printf("\t\t%" PRIu64 " losing\n", stats.losing[0]); 226 printf("\t\t%" PRIu64 " max_chain\n", stats.max_chain[0]); 227 printf("\t\t%" PRIu64 " max_probe\n", stats.max_probe[0]); 228 printf("\t\t%" PRIu64 " max_loss\n", stats.max_loss[0]); 229 printf("\tvestigial time-wait lookup_port\n"); 230 printf("\t\t%" PRIu64 " look\n", stats.look[1]); 231 printf("\t\t%" PRIu64 " hit\n", stats.hit[1]); 232 printf("\t\t%" PRIu64 " miss\n", stats.miss[1]); 233 printf("\t\t%" PRIu64 " probe\n", stats.probe[1]); 234 printf("\t\t%" PRIu64 " losing\n", stats.losing[1]); 235 printf("\t\t%" PRIu64 " max_chain\n", stats.max_chain[1]); 236 printf("\t\t%" PRIu64 " max_probe\n", stats.max_probe[1]); 237 printf("\t\t%" PRIu64 " max_loss\n", stats.max_loss[1]); 238 } 239 240 void 241 show_vtw_v4(void (*print)(const vtw_t *)) 242 { 243 fatp_t *base, *lim; 244 fatp_t **hash, **port; 245 size_t n; 246 fatp_ctl_t fat_tcpv4; 247 vtw_ctl_t vtw_tcpv4[VTW_NCLASS]; 248 int i; 249 int mem = 0; 250 void *p; 251 252 if ((p = lookup("fat_tcpv4")) == NULL) 253 return; 254 snarf(p, &fat_tcpv4, sizeof(fat_tcpv4)); 255 256 if ((p = lookup("vtw_tcpv4")) == NULL) 257 return; 258 snarf(p, &vtw_tcpv4[0], sizeof(vtw_tcpv4)); 259 260 mem += sizeof(fat_tcpv4); 261 mem += sizeof(vtw_tcpv4); 262 263 /* snarf/adjust vtw_ctl */ 264 for (i = 0; i < VTW_NCLASS; ++i) { 265 vtw_v4_t *kbase, *klim; 266 vtw_v4_t *ubase; 267 ptrdiff_t delta; 268 269 kbase = vtw_tcpv4[i].base.v4; 270 klim = vtw_tcpv4[i].lim.v4; 271 272 if (!kbase | !klim) 273 continue; 274 275 n = (klim - kbase + 1); 276 277 if (!i) { 278 if ((ubase = malloc(n * sizeof(*kbase))) == NULL) 279 err(EXIT_FAILURE, NULL); 280 snarf(kbase, ubase, n * sizeof(*ubase)); 281 282 mem += n * sizeof(*ubase); 283 } else { 284 ubase = vtw_tcpv4[0].base.v4; 285 } 286 287 delta = ubase - kbase; 288 289 vtw_tcpv4[i].base.v4 += delta; 290 vtw_tcpv4[i].lim.v4 += delta; 291 vtw_tcpv4[i].alloc.v4 += delta; 292 vtw_tcpv4[i].fat = &fat_tcpv4; 293 294 if (vtw_tcpv4[i].oldest.v4) 295 vtw_tcpv4[i].oldest.v4 += delta; 296 } 297 298 /* snarf/adjust fat_ctl */ 299 300 base = fat_tcpv4.base; 301 lim = fat_tcpv4.lim; 302 303 if (!base | !lim) 304 goto end; 305 306 mem += (lim - base + 1) * sizeof(*base); 307 308 fat_tcpv4.base = malloc((lim - base + 1) * sizeof(*base)); 309 if (fat_tcpv4.base == NULL) 310 err(EXIT_FAILURE, NULL); 311 fat_tcpv4.lim = fat_tcpv4.base + (lim - base); 312 313 snarf(base, fat_tcpv4.base, sizeof(*base) * (lim - base + 1)); 314 315 fat_tcpv4.vtw = &vtw_tcpv4[0]; 316 fat_tcpv4.free = fat_tcpv4.base + (fat_tcpv4.free - base); 317 318 n = fat_tcpv4.mask + 1; 319 hash = fat_tcpv4.hash; 320 port = fat_tcpv4.port; 321 322 fat_tcpv4.hash = malloc(n * sizeof(*hash)); 323 fat_tcpv4.port = malloc(n * sizeof(*port)); 324 if (fat_tcpv4.hash == NULL || fat_tcpv4.port == NULL) 325 err(EXIT_FAILURE, NULL); 326 327 snarf(hash, fat_tcpv4.hash, n * sizeof(*hash)); 328 snarf(port, fat_tcpv4.port, n * sizeof(*port)); 329 330 end: 331 process_vtw(&vtw_tcpv4[0], print); 332 333 #if 0 334 if (Vflag && vflag) { 335 printf("total memory for VTW in current config: %d bytes %f MB\n" 336 ,mem 337 ,mem / (1024.0 * 1024)); 338 } 339 #endif 340 } 341 342 void 343 show_vtw_v6(void (*print)(const vtw_t *)) 344 { 345 fatp_t *base, *lim; 346 fatp_t **hash, **port; 347 size_t n; 348 fatp_ctl_t fat_tcpv6; 349 vtw_ctl_t vtw_tcpv6[VTW_NCLASS]; 350 int i; 351 int mem = 0; 352 void *p; 353 354 if ((p = lookup("fat_tcpv6")) == NULL) 355 return; 356 snarf(p, &fat_tcpv6, sizeof(fat_tcpv6)); 357 if ((p = lookup("vtw_tcpv6")) == NULL) 358 return; 359 snarf(p, &vtw_tcpv6[0], sizeof(vtw_tcpv6)); 360 361 mem += sizeof(fat_tcpv6); 362 mem += sizeof(vtw_tcpv6); 363 364 for (i = 0; i < VTW_NCLASS; ++i) { 365 vtw_v6_t *kbase, *klim; 366 vtw_v6_t *ubase; 367 ptrdiff_t delta; 368 369 kbase = vtw_tcpv6[i].base.v6; 370 klim = vtw_tcpv6[i].lim.v6; 371 372 if (!kbase | !klim) 373 continue; 374 375 n = (klim - kbase + 1); 376 377 if (!i) { 378 if ((ubase = malloc(n * sizeof(*kbase))) == NULL) 379 err(EXIT_FAILURE, NULL); 380 381 snarf(kbase, ubase, n * sizeof(*ubase)); 382 383 mem += n * sizeof(*ubase); 384 } else { 385 ubase = vtw_tcpv6[0].base.v6; 386 } 387 388 delta = ubase - kbase; 389 390 vtw_tcpv6[i].base.v6 += delta; 391 vtw_tcpv6[i].lim.v6 += delta; 392 vtw_tcpv6[i].alloc.v6 += delta; 393 vtw_tcpv6[i].fat = &fat_tcpv6; 394 395 if (vtw_tcpv6[i].oldest.v6) 396 vtw_tcpv6[i].oldest.v6 += delta; 397 } 398 399 base = fat_tcpv6.base; 400 lim = fat_tcpv6.lim; 401 402 if (!base | !lim) 403 goto end; 404 405 mem += (lim - base + 1) * sizeof(*base); 406 407 fat_tcpv6.base = malloc((lim - base + 1) * sizeof(*base)); 408 if (fat_tcpv6.base == NULL) 409 err(EXIT_FAILURE, NULL); 410 fat_tcpv6.lim = fat_tcpv6.base + (lim - base); 411 412 snarf(base, fat_tcpv6.base, sizeof(*base) * (lim - base + 1)); 413 414 fat_tcpv6.vtw = &vtw_tcpv6[0]; 415 fat_tcpv6.free = fat_tcpv6.base + (fat_tcpv6.free - base); 416 417 n = fat_tcpv6.mask + 1; 418 hash = fat_tcpv6.hash; 419 port = fat_tcpv6.port; 420 421 fat_tcpv6.hash = malloc(n * sizeof(*hash)); 422 fat_tcpv6.port = malloc(n * sizeof(*port)); 423 if (fat_tcpv6.hash == NULL || fat_tcpv6.port == NULL) 424 err(EXIT_FAILURE, NULL); 425 426 snarf(hash, fat_tcpv6.hash, n * sizeof(*hash)); 427 snarf(port, fat_tcpv6.port, n * sizeof(*port)); 428 429 end: 430 431 process_vtw(&vtw_tcpv6[0], print); 432 #if 0 433 if (Vflag && vflag) { 434 printf("total memory for VTW in current config: %d bytes %f MB\n" 435 ,mem 436 ,mem / (1024.0 * 1024)); 437 } 438 #endif 439 } 440
Indexes created Mon Sep 22 13:09:51 GMT 2025