[317] | 1 | /*
|
---|
| 2 | * TINET (TCP/IP Protocol Stack)
|
---|
| 3 | *
|
---|
| 4 | * Copyright (C) 2001-2017 by Dep. of Computer Science and Engineering
|
---|
| 5 | * Tomakomai National College of Technology, JAPAN
|
---|
| 6 | *
|
---|
| 7 | * ä¸è¨èä½æ¨©è
|
---|
| 8 | ã¯ï¼ä»¥ä¸ã® (1)ï½(4) ã®æ¡ä»¶ãï¼Free Software Foundation
|
---|
| 9 | * ã«ãã£ã¦å
|
---|
| 10 | ¬è¡¨ããã¦ãã GNU General Public License ã® Version 2 ã«è¨
|
---|
| 11 | * è¿°ããã¦ããæ¡ä»¶ãæºããå ´åã«éãï¼æ¬ã½ããã¦ã§ã¢ï¼æ¬ã½ããã¦ã§ã¢
|
---|
| 12 | * ãæ¹å¤ãããã®ãå«ãï¼ä»¥ä¸åãï¼ã使ç¨ã»è¤è£½ã»æ¹å¤ã»åé
|
---|
| 13 | å¸ï¼ä»¥ä¸ï¼
|
---|
| 14 | * å©ç¨ã¨å¼ã¶ï¼ãããã¨ãç¡åã§è¨±è«¾ããï¼
|
---|
| 15 | * (1) æ¬ã½ããã¦ã§ã¢ãã½ã¼ã¹ã³ã¼ãã®å½¢ã§å©ç¨ããå ´åã«ã¯ï¼ä¸è¨ã®èä½
|
---|
| 16 | * 権表示ï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãï¼ãã®ã¾ã¾ã®å½¢ã§ã½ã¼
|
---|
| 17 | * ã¹ã³ã¼ãä¸ã«å«ã¾ãã¦ãããã¨ï¼
|
---|
| 18 | * (2) æ¬ã½ããã¦ã§ã¢ãï¼ã©ã¤ãã©ãªå½¢å¼ãªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
|
---|
| 19 | * ç¨ã§ããå½¢ã§åé
|
---|
| 20 | å¸ããå ´åã«ã¯ï¼åé
|
---|
| 21 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨
|
---|
| 22 | * è
|
---|
| 23 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®èä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨
|
---|
| 24 | * ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
|
---|
| 25 | * (3) æ¬ã½ããã¦ã§ã¢ãï¼æ©å¨ã«çµã¿è¾¼ããªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
|
---|
| 26 | * ç¨ã§ããªãå½¢ã§åé
|
---|
| 27 | å¸ããå ´åã«ã¯ï¼æ¬¡ã®æ¡ä»¶ãæºãããã¨ï¼
|
---|
| 28 | * (a) åé
|
---|
| 29 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨è
|
---|
| 30 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®è
|
---|
| 31 | * ä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
|
---|
| 32 | * (4) æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´æ¥çã¾ãã¯éæ¥çã«çãããããªãæ
|
---|
| 33 | * 害ãããï¼ä¸è¨èä½æ¨©è
|
---|
| 34 | ããã³TOPPERSããã¸ã§ã¯ããå
|
---|
| 35 | 責ãããã¨ï¼
|
---|
| 36 | *
|
---|
| 37 | * æ¬ã½ããã¦ã§ã¢ã¯ï¼ç¡ä¿è¨¼ã§æä¾ããã¦ãããã®ã§ããï¼ä¸è¨èä½æ¨©è
|
---|
| 38 | ã
|
---|
| 39 | * ãã³TOPPERSããã¸ã§ã¯ãã¯ï¼æ¬ã½ããã¦ã§ã¢ã«é¢ãã¦ï¼ãã®é©ç¨å¯è½æ§ã
|
---|
| 40 | * å«ãã¦ï¼ãããªãä¿è¨¼ãè¡ããªãï¼ã¾ãï¼æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´
|
---|
| 41 | * æ¥çã¾ãã¯éæ¥çã«çãããããªãæ害ã«é¢ãã¦ãï¼ãã®è²¬ä»»ãè² ããªãï¼
|
---|
| 42 | *
|
---|
| 43 | * @(#) $Id: nd6.c 317 2017-08-03 13:14:26Z coas-nagasima $
|
---|
| 44 | */
|
---|
| 45 |
|
---|
| 46 | /* $FreeBSD: src/sys/netinet6/nd6.c,v 1.20 2002/08/02 20:49:14 rwatson Exp $ */
|
---|
| 47 | /* $KAME: nd6.c,v 1.144 2001/05/24 07:44:00 itojun Exp $ */
|
---|
| 48 |
|
---|
| 49 | /*
|
---|
| 50 | * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
|
---|
| 51 | * All rights reserved.
|
---|
| 52 | *
|
---|
| 53 | * Redistribution and use in source and binary forms, with or without
|
---|
| 54 | * modification, are permitted provided that the following conditions
|
---|
| 55 | * are met:
|
---|
| 56 | * 1. Redistributions of source code must retain the above copyright
|
---|
| 57 | * notice, this list of conditions and the following disclaimer.
|
---|
| 58 | * 2. Redistributions in binary form must reproduce the above copyright
|
---|
| 59 | * notice, this list of conditions and the following disclaimer in the
|
---|
| 60 | * documentation and/or other materials provided with the distribution.
|
---|
| 61 | * 3. Neither the name of the project nor the names of its contributors
|
---|
| 62 | * may be used to endorse or promote products derived from this software
|
---|
| 63 | * without specific prior written permission.
|
---|
| 64 | *
|
---|
| 65 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
|
---|
| 66 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
---|
| 67 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
---|
| 68 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
|
---|
| 69 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
---|
| 70 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
---|
| 71 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
---|
| 72 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
---|
| 73 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
---|
| 74 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
---|
| 75 | * SUCH DAMAGE.
|
---|
| 76 | */
|
---|
| 77 |
|
---|
| 78 | /*
|
---|
| 79 | * XXX
|
---|
| 80 | * KAME 970409 note:
|
---|
| 81 | * BSD/OS version heavily modifies this code, related to llinfo.
|
---|
| 82 | * Since we don't have BSD/OS version of net/route.c in our hand,
|
---|
| 83 | * I left the code mostly as it was in 970310. -- itojun
|
---|
| 84 | */
|
---|
| 85 |
|
---|
| 86 | #include <string.h>
|
---|
| 87 |
|
---|
| 88 | #ifdef TARGET_KERNEL_ASP
|
---|
| 89 |
|
---|
| 90 | #include <kernel.h>
|
---|
| 91 | #include <sil.h>
|
---|
| 92 | #include "kernel_cfg.h"
|
---|
| 93 |
|
---|
| 94 | #endif /* of #ifdef TARGET_KERNEL_ASP */
|
---|
| 95 |
|
---|
| 96 | #ifdef TARGET_KERNEL_JSP
|
---|
| 97 |
|
---|
| 98 | #include <s_services.h>
|
---|
| 99 | #include <t_services.h>
|
---|
| 100 | #include "kernel_id.h"
|
---|
| 101 |
|
---|
| 102 | #endif /* of #ifdef TARGET_KERNEL_JSP */
|
---|
| 103 |
|
---|
| 104 | #include <tinet_defs.h>
|
---|
| 105 | #include <tinet_config.h>
|
---|
| 106 |
|
---|
| 107 | #include <net/if.h>
|
---|
| 108 | #include <net/if_loop.h>
|
---|
| 109 | #include <net/if_ppp.h>
|
---|
| 110 | #include <net/ethernet.h>
|
---|
| 111 | #include <net/if_arp.h>
|
---|
| 112 | #include <net/ppp.h>
|
---|
| 113 | #include <net/ppp_ipcp.h>
|
---|
| 114 | #include <net/net.h>
|
---|
| 115 | #include <net/net_endian.h>
|
---|
| 116 | #include <net/net_var.h>
|
---|
| 117 | #include <net/net_buf.h>
|
---|
| 118 | #include <net/net_timer.h>
|
---|
| 119 | #include <net/net_count.h>
|
---|
| 120 |
|
---|
| 121 | #include <netinet/in.h>
|
---|
| 122 | #include <netinet/in_var.h>
|
---|
| 123 | #include <netinet/ip.h>
|
---|
| 124 | #include <netinet/ip_var.h>
|
---|
| 125 | #include <netinet/ip_icmp.h>
|
---|
| 126 |
|
---|
| 127 | #include <netinet6/nd6.h>
|
---|
| 128 |
|
---|
| 129 | #include <net/if_var.h>
|
---|
| 130 |
|
---|
| 131 | #ifdef _IP6_CFG
|
---|
| 132 |
|
---|
| 133 | /*
|
---|
| 134 | * è¿é£ãã£ãã·ã¥
|
---|
| 135 | */
|
---|
| 136 |
|
---|
| 137 | static T_LLINFO_ND6 nd6_cache[NUM_ND6_CACHE_ENTRY];
|
---|
| 138 |
|
---|
| 139 | /*
|
---|
| 140 | * nd6_free -- ã«ã¼ã¿ãåé¤ããã
|
---|
| 141 | */
|
---|
| 142 |
|
---|
| 143 | static void
|
---|
| 144 | nd6_free (T_LLINFO_ND6 *ln)
|
---|
| 145 | {
|
---|
| 146 | T_DEF_ROUTER *dr;
|
---|
| 147 |
|
---|
| 148 | dr = nd6_defrtrlist_lookup(&ln->addr);
|
---|
| 149 | if (dr != NULL) {
|
---|
| 150 | ln->state = ND6_LLINFO_INCOMPLETE;
|
---|
| 151 |
|
---|
| 152 | /* ãã¬ãã£ãã¯ã¹ã»ãªã¹ãããã«ã¼ã¿ãåé¤ããã*/
|
---|
| 153 | nd6_defrtrlist_del(dr);
|
---|
| 154 | }
|
---|
| 155 | }
|
---|
| 156 |
|
---|
| 157 | /*
|
---|
| 158 | * nd6_timer -- è¿é£æ¢ç´¢ç®¡çã¿ã¤ãã¼
|
---|
| 159 | */
|
---|
| 160 |
|
---|
| 161 | void
|
---|
| 162 | nd6_timer (void)
|
---|
| 163 | {
|
---|
| 164 | T_IFNET *ifp = IF_GET_IFNET();
|
---|
| 165 | T_LLINFO_ND6 *ln;
|
---|
| 166 | SYSTIM now;
|
---|
| 167 | int_t ix;
|
---|
| 168 |
|
---|
| 169 | /* è¿é£ãã£ãã·ã¥ã®å¦ç */
|
---|
| 170 | syscall(wai_sem(SEM_ND6_CACHE));
|
---|
| 171 | syscall(get_tim(&now));
|
---|
| 172 | for (ix = NUM_ND6_CACHE_ENTRY; ix -- > 0; ) {
|
---|
| 173 | ln = &nd6_cache[ix];
|
---|
| 174 | if (ln->state >= ND6_LLINFO_NO_STATE && (int32_t)(ln->expire - now) < 0) {
|
---|
| 175 | /* ln->expire < now */
|
---|
| 176 |
|
---|
| 177 | switch (ln->state) {
|
---|
| 178 |
|
---|
| 179 | case ND6_LLINFO_INCOMPLETE: /* æªè§£æ±º */
|
---|
| 180 | if (ln->asked < ND6_MAX_MCAST_QUERY) {
|
---|
| 181 | /*
|
---|
| 182 | * ãã«ããã£ã¹ãã¢ãã¬ã¹è¦è«ã®åéåæ°ä»¥ä¸ã®å ´åã®å¦ç
|
---|
| 183 | */
|
---|
| 184 | ln->asked ++;
|
---|
| 185 | ln->expire = now + ND6_RETRANS_TIME; /* è¿é£æ¢ç´¢éä¿¡éé */
|
---|
| 186 | nd6_ns_output(ifp, &in6_addr_unspecified, &ln->addr, ln, false);
|
---|
| 187 | }
|
---|
| 188 | else {
|
---|
| 189 | if (ln->hold != NULL) {
|
---|
| 190 | /*
|
---|
| 191 | * æçµçã«ã¯ãä¿çããã¦ãããããã¯ã¼ã¯ãããã¡ã
|
---|
| 192 | * ããã°ãICMP6 ERROR ãèªåèªèº«ã«è¿ãããã¨ã
|
---|
| 193 | * ãããã¯ã¼ã¯ãããã¡ãéæ¾ããã
|
---|
| 194 | * ããããç¾å¨ãicmp6_error ã®å®è£
|
---|
| 195 | ãä¸å®å
|
---|
| 196 | ¨ã®ããã
|
---|
| 197 | * ãããã¯ã¼ã¯ãããã¡ã®éæ¾ã®ã¿è¡ãã
|
---|
| 198 | */
|
---|
| 199 | #if 0 /* ä¿ç */
|
---|
| 200 | icmp6_error(ln->hold, ICMP6_DST_UNREACH,
|
---|
| 201 | ICMP6_DST_UNREACH_ADDR, 0);
|
---|
| 202 | #endif /* #if 0 */
|
---|
| 203 | syscall(rel_net_buf(ln->hold));
|
---|
| 204 | ln->hold = NULL;
|
---|
| 205 | }
|
---|
| 206 | nd6_free(ln);
|
---|
| 207 | memset((void*)ln, 0, sizeof(*ln));
|
---|
| 208 | }
|
---|
| 209 | break;
|
---|
| 210 |
|
---|
| 211 | case ND6_LLINFO_REACHABLE: /* å°éå¯è½ */
|
---|
| 212 | if (ln->expire) {
|
---|
| 213 | ln->expire = now + ND6_GCOLLECTION_TIME;
|
---|
| 214 | ln->state = ND6_LLINFO_STALE;
|
---|
| 215 | }
|
---|
| 216 | break;
|
---|
| 217 |
|
---|
| 218 | case ND6_LLINFO_STALE: /* å°éå¯è½æ§ã¯æªç¢ºèª */
|
---|
| 219 | if (ln->expire) {
|
---|
| 220 | if (ln->hold != NULL) {
|
---|
| 221 | syscall(rel_net_buf(ln->hold));
|
---|
| 222 | ln->hold = NULL;
|
---|
| 223 | }
|
---|
| 224 | nd6_free(ln);
|
---|
| 225 | memset((void*)ln, 0, sizeof(*ln));
|
---|
| 226 | }
|
---|
| 227 | break;
|
---|
| 228 |
|
---|
| 229 | case ND6_LLINFO_DELAY: /* å°éå¯è½æ§ã®ç¢ºèªå¾
|
---|
| 230 | æ© */
|
---|
| 231 | ln->asked = 1;
|
---|
| 232 | ln->expire = now + ND6_RETRANS_TIME; /* è¿é£æ¢ç´¢éä¿¡éé */
|
---|
| 233 | ln->state = ND6_LLINFO_PROBE;
|
---|
| 234 | nd6_ns_output(ifp, &ln->addr, &ln->addr, ln, false);
|
---|
| 235 | break;
|
---|
| 236 |
|
---|
| 237 | case ND6_LLINFO_PROBE: /* å°éå¯è½æ§ã確èªä¸ */
|
---|
| 238 | if (ln->asked < ND6_MAX_UCAST_QUERY) {
|
---|
| 239 | /*
|
---|
| 240 | * ã¦ããã£ã¹ãã¢ãã¬ã¹è¦è«ã®åéåæ°ä»¥ä¸ã®å ´åã®å¦ç
|
---|
| 241 | */
|
---|
| 242 | ln->asked ++;
|
---|
| 243 | ln->expire += ND6_RETRANS_TIME; /* è¿é£æ¢ç´¢éä¿¡éé */
|
---|
| 244 | nd6_ns_output(ifp, &ln->addr, &ln->addr, ln, false);
|
---|
| 245 | }
|
---|
| 246 | else {
|
---|
| 247 | if (ln->hold != NULL) {
|
---|
| 248 | syscall(rel_net_buf(ln->hold));
|
---|
| 249 | ln->hold = NULL;
|
---|
| 250 | }
|
---|
| 251 | nd6_free(ln);
|
---|
| 252 | memset((void*)ln, 0, sizeof(*ln));
|
---|
| 253 | }
|
---|
| 254 | break;
|
---|
| 255 |
|
---|
| 256 | }
|
---|
| 257 | }
|
---|
| 258 | }
|
---|
| 259 | syscall(sig_sem(SEM_ND6_CACHE));
|
---|
| 260 |
|
---|
| 261 | /* ãã£ãã©ã«ãã«ã¼ã¿ã»ãªã¹ãã®å¦ç */
|
---|
| 262 | nd6_defrtrlist_timer();
|
---|
| 263 |
|
---|
| 264 | /* ãã¬ãã£ãã¯ã¹ã»ãªã¹ãã®å¦ç */
|
---|
| 265 | nd6_prelist_timer();
|
---|
| 266 |
|
---|
| 267 | /* ãããã¯ã¼ã¯ã¤ã³ã¿ãã§ã¼ã¹ã®ã¢ãã¬ã¹ã®å¦ç */
|
---|
| 268 | in6_ifaddr_timer(ifp);
|
---|
| 269 |
|
---|
| 270 | /*
|
---|
| 271 | * å°éå¯è½ç¶æ
|
---|
| 272 | ã®æå¹æéã®æ´æ°
|
---|
| 273 | */
|
---|
| 274 | if ((int32_t)(nd6_recalc_reachtm_interval - now) < 0) {
|
---|
| 275 | /* nd6_recalc_reachtm_interval < now */
|
---|
| 276 | nd6_recalc_reachtm_interval = now + ND6_RECALC_REACHTM_INTERVAL;
|
---|
| 277 | nd6_reachable_time = ND6_CALC_REACH_TIME(nd6_base_reachable_time);
|
---|
| 278 | }
|
---|
| 279 | timeout((callout_func)nd6_timer, NULL, ND6_TIMER_TMO);
|
---|
| 280 | }
|
---|
| 281 |
|
---|
| 282 | /*
|
---|
| 283 | * nd6_get_cache -- è¿é£ãã£ãã·ã¥ãç²å¾ããã
|
---|
| 284 | */
|
---|
| 285 |
|
---|
| 286 | const T_LLINFO_ND6 *
|
---|
| 287 | nd6_get_cache (void)
|
---|
| 288 | {
|
---|
| 289 | return nd6_cache;
|
---|
| 290 | }
|
---|
| 291 |
|
---|
| 292 | /*
|
---|
| 293 | * nd6_ifattach -- è¿é£æ¢ç´¢ã®åæè¨å®ãè¡ãã
|
---|
| 294 | */
|
---|
| 295 |
|
---|
| 296 | void
|
---|
| 297 | nd6_ifattach (T_IFNET *ifp)
|
---|
| 298 | {
|
---|
| 299 | }
|
---|
| 300 |
|
---|
| 301 | /*
|
---|
| 302 | * nd6_output_hold -- è¿é£æ¢ç´¢ãã£ãã·ã¥ã«ä¿çããã¦ãã
|
---|
| 303 | * ã¢ãã¬ã¹è§£æ±ºå¾
|
---|
| 304 | ã¡ã®ãã¼ã¿ã°ã©ã ãããã°éä¿¡ããã
|
---|
| 305 | *
|
---|
| 306 | * 注æ: ã»ããã© SEM_ND6_CACHE ã«ããããã¯ç¶æ
|
---|
| 307 | ã§å¼åºããã¨ã
|
---|
| 308 | */
|
---|
| 309 |
|
---|
| 310 | ER
|
---|
| 311 | nd6_output_hold (T_IFNET *ifp, T_LLINFO_ND6 *ln)
|
---|
| 312 | {
|
---|
| 313 | SYSTIM now;
|
---|
| 314 |
|
---|
| 315 | /* ã¢ãã¬ã¹è§£æ±ºå¾
|
---|
| 316 | ã¡ã®ãã¼ã¿ã°ã©ã ãããã°éä¿¡ããã*/
|
---|
| 317 | if (ln->hold) {
|
---|
| 318 |
|
---|
| 319 | /* ã¿ã¤ã ã¢ã¦ãã®å¦ç */
|
---|
| 320 | if (ln->tmout != TMO_FEVR) {
|
---|
| 321 |
|
---|
| 322 | /*
|
---|
| 323 | * ã¿ã¤ã ã¢ã¦ãã®æå®ãæ°¸ä¹
|
---|
| 324 | ã§ãªããæéãéãã¦ããã°ã
|
---|
| 325 | * åºåããªãã§çµäºããã
|
---|
| 326 | */
|
---|
| 327 | syscall(get_tim(&now));
|
---|
| 328 | if ((int32_t)(ln->tmout - now) < 0) {
|
---|
| 329 | /* ln->tmout < now */
|
---|
| 330 | syscall(rel_net_buf(ln->hold));
|
---|
| 331 | ln->hold = NULL;
|
---|
| 332 | return E_TMOUT;
|
---|
| 333 | }
|
---|
| 334 | }
|
---|
| 335 |
|
---|
| 336 | nd6_output(ifp, ln->hold, &ln->addr, ln, TMO_FEVR);
|
---|
| 337 | ln->hold = NULL;
|
---|
| 338 | }
|
---|
| 339 | return E_OK;
|
---|
| 340 | }
|
---|
| 341 |
|
---|
| 342 | /*
|
---|
| 343 | * nd6_lookup -- è¿é£æ¢ç´¢ãã£ãã·ã¥ãæ¢ç´¢ããã
|
---|
| 344 | *
|
---|
| 345 | * 注æ: ã»ããã© SEM_ND6_CACHE ã«ããããã¯ç¶æ
|
---|
| 346 | ã§å¼åºããã¨ã
|
---|
| 347 | *
|
---|
| 348 | */
|
---|
| 349 |
|
---|
| 350 | T_LLINFO_ND6 *
|
---|
| 351 | nd6_lookup (const T_IN6_ADDR *addr, bool_t create)
|
---|
| 352 | {
|
---|
| 353 | SYSTIM min = 0xffffffff;
|
---|
| 354 | int_t ix, fix = -1, mix = -1;
|
---|
| 355 |
|
---|
| 356 | for (ix = NUM_ND6_CACHE_ENTRY; ix -- > 0; ) {
|
---|
| 357 | if (nd6_cache[ix].state == 0) {
|
---|
| 358 | /* æªä½¿ç¨ã¨ã³ããªã®ã¤ã³ããã¯ã¹ãè¨é²ããã*/
|
---|
| 359 | if (fix == -1)
|
---|
| 360 | fix = ix;
|
---|
| 361 | }
|
---|
| 362 | else if (IN6_ARE_ADDR_EQUAL(addr, &nd6_cache[ix].addr)) {
|
---|
| 363 | return &nd6_cache[ix];
|
---|
| 364 | }
|
---|
| 365 | else if ((int32_t)(nd6_cache[ix].expire - min) < 0) { /* nd6_cache[ix].expire < min */
|
---|
| 366 | /* æå¹æéãæçã¨ã³ããªã®ã¤ã³ããã¯ã¹ãè¨é²ããã*/
|
---|
| 367 | min = nd6_cache[ix].expire;
|
---|
| 368 | mix = ix;
|
---|
| 369 | }
|
---|
| 370 | }
|
---|
| 371 |
|
---|
| 372 | if (create) {
|
---|
| 373 | if (fix == -1) {
|
---|
| 374 | if (nd6_cache[mix].hold != NULL) {
|
---|
| 375 | syscall(rel_net_buf(nd6_cache[mix].hold));
|
---|
| 376 | }
|
---|
| 377 | fix = mix;
|
---|
| 378 | }
|
---|
| 379 | syscall(get_tim(&nd6_cache[fix].expire));
|
---|
| 380 | nd6_cache[fix].addr = *addr;
|
---|
| 381 | nd6_cache[fix].state = ND6_LLINFO_NO_STATE;
|
---|
| 382 | return &nd6_cache[fix];
|
---|
| 383 | }
|
---|
| 384 | else
|
---|
| 385 | return NULL;
|
---|
| 386 | }
|
---|
| 387 |
|
---|
| 388 | /*
|
---|
| 389 | * nd6_cache_lladdr -- è¿é£æ¢ç´¢ãã£ãã·ã¥ã«ç»é²ããã
|
---|
| 390 | */
|
---|
| 391 |
|
---|
| 392 | T_LLINFO_ND6 *
|
---|
| 393 | nd6_cache_lladdr (T_IFNET *ifp, const T_IN6_ADDR *from,
|
---|
| 394 | T_IF_ADDR *lladdr, uint8_t type, uint8_t code)
|
---|
| 395 | {
|
---|
| 396 | T_LLINFO_ND6 *ln;
|
---|
| 397 | SYSTIM now;
|
---|
| 398 | bool_t newentry, olladdr, llchange, doupdate;
|
---|
| 399 | int_t newstate = ND6_LLINFO_INCOMPLETE;
|
---|
| 400 |
|
---|
| 401 | /* ã¢ãã¬ã¹ãç¡æå®ãªãä½ãããªãã*/
|
---|
| 402 | if (IN6_IS_ADDR_UNSPECIFIED(from))
|
---|
| 403 | return NULL;
|
---|
| 404 |
|
---|
| 405 | /* è¿é£ãã£ãã·ã¥ã«ç»é²ããã*/
|
---|
| 406 | syscall(wai_sem(SEM_ND6_CACHE));
|
---|
| 407 | if ((ln = nd6_lookup(from, false)) == NULL) {
|
---|
| 408 | ln = nd6_lookup(from, true);
|
---|
| 409 | newentry = true;
|
---|
| 410 | }
|
---|
| 411 | else
|
---|
| 412 | newentry = false;
|
---|
| 413 |
|
---|
| 414 | olladdr = ln->state > ND6_LLINFO_INCOMPLETE;
|
---|
| 415 | if (!olladdr || lladdr == NULL)
|
---|
| 416 | llchange = false;
|
---|
| 417 | else if (memcmp(lladdr, &ln->ifaddr, sizeof(T_IF_ADDR)))
|
---|
| 418 | llchange = true;
|
---|
| 419 | else
|
---|
| 420 | llchange = false;
|
---|
| 421 |
|
---|
| 422 | /*
|
---|
| 423 | * ç¶æ
|
---|
| 424 | é·ç§»è¡¨
|
---|
| 425 | *
|
---|
| 426 | * nd_na_flags
|
---|
| 427 | * newnetry olladdr lladdr llchange å¦ç (L: lladdr ãç»é²ãã)
|
---|
| 428 | *
|
---|
| 429 | * F F N - (1)
|
---|
| 430 | * F T N - (2)
|
---|
| 431 | * F F Y - (3) L * -> STALE
|
---|
| 432 | * F T Y F (4) L
|
---|
| 433 | * F T Y T (5) L * -> STALE
|
---|
| 434 | * T - N - (6) * -> NO_STATE
|
---|
| 435 | * T - Y - (7) L * -> STALE
|
---|
| 436 | */
|
---|
| 437 |
|
---|
| 438 | /* ãã¼ã¿ãªã³ã¯å±¤ã®ã¢ãã¬ã¹ãéç¥ããã¦ããã°æ´æ°ããã*/
|
---|
| 439 | if (lladdr != NULL) {
|
---|
| 440 | ln->ifaddr = *(T_IF_ADDR *)lladdr;
|
---|
| 441 | }
|
---|
| 442 |
|
---|
| 443 | if (newentry) {
|
---|
| 444 | if (lladdr != NULL) /* (7) */
|
---|
| 445 | newstate = ND6_LLINFO_STALE;
|
---|
| 446 | else /* (6) */
|
---|
| 447 | newstate = ND6_LLINFO_NO_STATE;
|
---|
| 448 | doupdate = true;
|
---|
| 449 | }
|
---|
| 450 | else {
|
---|
| 451 | if ((!olladdr && lladdr != NULL) || /* (3) */
|
---|
| 452 | ( olladdr && lladdr != NULL && llchange)) { /* (5) */
|
---|
| 453 | newstate = ND6_LLINFO_STALE;
|
---|
| 454 | doupdate = true;
|
---|
| 455 | }
|
---|
| 456 | else /* (1),(2),(4) */
|
---|
| 457 | doupdate = false;
|
---|
| 458 | }
|
---|
| 459 |
|
---|
| 460 | /* è¿é£ãã£ãã·ã¥ã¨ã³ããªãæ´æ°ããã*/
|
---|
| 461 | if (doupdate) {
|
---|
| 462 | ln->state = newstate;
|
---|
| 463 |
|
---|
| 464 | syscall(get_tim(&now));
|
---|
| 465 | if (ln->state == ND6_LLINFO_STALE) {
|
---|
| 466 | ln->expire = now + ND6_GCOLLECTION_TIME;
|
---|
| 467 |
|
---|
| 468 | /* ã¢ãã¬ã¹è§£æ±ºå¾
|
---|
| 469 | ã¡ã®ãã¼ã¿ã°ã©ã ãããã°éä¿¡ããã*/
|
---|
| 470 | nd6_output_hold(ifp, ln);
|
---|
| 471 | }
|
---|
| 472 | else if (ln->state == ND6_LLINFO_INCOMPLETE)
|
---|
| 473 | ln->expire = now;
|
---|
| 474 | }
|
---|
| 475 | syscall(sig_sem(SEM_ND6_CACHE));
|
---|
| 476 |
|
---|
| 477 |
|
---|
| 478 | /* ã«ã¼ã¿éç¥ã®å¦ç */
|
---|
| 479 | switch (type) {
|
---|
| 480 |
|
---|
| 481 | case ND_NEIGHBOR_SOLICIT:
|
---|
| 482 | if (newentry)
|
---|
| 483 | ln->flags &= ~ND6_LLIF_ROUTER;
|
---|
| 484 | break;
|
---|
| 485 |
|
---|
| 486 | case ND_REDIRECT:
|
---|
| 487 | if (code == ND_REDIRECT_ROUTER)
|
---|
| 488 | ln->flags |= ND6_LLIF_ROUTER;
|
---|
| 489 | else if (newentry)
|
---|
| 490 | ln->flags &= ~ND6_LLIF_ROUTER;
|
---|
| 491 | break;
|
---|
| 492 |
|
---|
| 493 | case ND_ROUTER_SOLICIT:
|
---|
| 494 | ln->flags &= ~ND6_LLIF_ROUTER;
|
---|
| 495 | break;
|
---|
| 496 |
|
---|
| 497 | case ND_ROUTER_ADVERT:
|
---|
| 498 | if ((!newentry && (olladdr || lladdr != NULL)) ||
|
---|
| 499 | ( newentry && lladdr))
|
---|
| 500 | ln->flags |= ND6_LLIF_ROUTER;
|
---|
| 501 | break;
|
---|
| 502 | }
|
---|
| 503 |
|
---|
| 504 | return ln;
|
---|
| 505 | }
|
---|
| 506 |
|
---|
| 507 | /*
|
---|
| 508 | * nd6_is_addr_neighbor -- æå®ãããã¢ãã¬ã¹ã®ãã¼ããåä¸ãªã³ã¯ã«ããããã§ãã¯ããã
|
---|
| 509 | */
|
---|
| 510 |
|
---|
| 511 | bool_t
|
---|
| 512 | nd6_is_addr_neighbor (T_IFNET *ifp, const T_IN6_ADDR *addr)
|
---|
| 513 | {
|
---|
| 514 | if (IN6_IS_ADDR_LINKLOCAL(addr))
|
---|
| 515 | return true;
|
---|
| 516 |
|
---|
| 517 | if (nd6_onlink_prefix_lookup(addr) != NULL)
|
---|
| 518 | return true;
|
---|
| 519 |
|
---|
| 520 | if (nd6_lookup(addr, false) != NULL)
|
---|
| 521 | return true;
|
---|
| 522 |
|
---|
| 523 | return false;
|
---|
| 524 | }
|
---|
| 525 |
|
---|
| 526 | /*
|
---|
| 527 | * nd6_output -- è¿é£æ¢ç´¢ã®åºåé¢æ°
|
---|
| 528 | *
|
---|
| 529 | * 注æ: ã»ããã© SEM_ND6_CACHE ã«ããããã¯ç¶æ
|
---|
| 530 | ã§å¼åºããã¨ã
|
---|
| 531 | */
|
---|
| 532 |
|
---|
| 533 | ER
|
---|
| 534 | nd6_output (T_IFNET *ifp, T_NET_BUF *output, const T_IN6_ADDR *dst, T_LLINFO_ND6 *ln, TMO tmout)
|
---|
| 535 | {
|
---|
| 536 | ER error = E_OK;
|
---|
| 537 | SYSTIM now;
|
---|
| 538 |
|
---|
| 539 | /*
|
---|
| 540 | * ãã¦å
|
---|
| 541 | ã¢ãã¬ã¹ããã«ããã£ã¹ãããè¿é£ãã£ãã·ã¥ã
|
---|
| 542 | * ä¸è¦ã®å ´åã¯ç´ã¡ã«éä¿¡ããã
|
---|
| 543 | */
|
---|
| 544 | if (!(IN6_IS_ADDR_MULTICAST(dst) || !IF_IN6_NEED_CACHE(ifp))) {
|
---|
| 545 | if (ln == NULL) {
|
---|
| 546 | /* è¿é£ãã£ãã·ã¥ãæªå®ç¾©ã®å ´å */
|
---|
| 547 | if (nd6_is_addr_neighbor(ifp, dst)) {
|
---|
| 548 | /*
|
---|
| 549 | * æå®ãããã¢ãã¬ã¹ã®ãã¼ããåä¸ãªã³ã¯ã«ããæã¯ã
|
---|
| 550 | * è¿é£ãã£ãã·ã¥ãæ¢ç´¢ããæªå®ç¾©ã®å ´åã¯ç»é²ããã
|
---|
| 551 | */
|
---|
| 552 | ln = nd6_lookup(dst, true);
|
---|
| 553 | }
|
---|
| 554 | else {
|
---|
| 555 | error = E_CLS;
|
---|
| 556 | goto err_ret;
|
---|
| 557 | }
|
---|
| 558 | }
|
---|
| 559 |
|
---|
| 560 | /*
|
---|
| 561 | * è¿é£ãã£ãã·ã¥ã®ç¶æ
|
---|
| 562 | ãããã¼ã¿ãªã³ã¯å±¤ã®ã¢ãã¬ã¹ãåãã£ã¦ãã¦ãã
|
---|
| 563 | * å°éå¯è½æ§ã確èªããã¦ããªãã¨ãã¯ãå°éä¸è½éç¥ãéå§ããã
|
---|
| 564 | */
|
---|
| 565 | if (ln->state == ND6_LLINFO_STALE) {
|
---|
| 566 | syscall(get_tim(&now));
|
---|
| 567 | ln->expire = now + ND6_DELAY_TIME;
|
---|
| 568 | ln->asked = 0;
|
---|
| 569 | ln->state = ND6_LLINFO_DELAY;
|
---|
| 570 | }
|
---|
| 571 |
|
---|
| 572 | /*
|
---|
| 573 | * è¿é£ãã£ãã·ã¥ã®ç¶æ
|
---|
| 574 | ãããã¼ã¿ãªã³ã¯å±¤ã®ã¢ãã¬ã¹æªè§£æ±ºã®å ´åã¯
|
---|
| 575 | * è¿é£æ¢ç´¢ãè¡ãã
|
---|
| 576 | */
|
---|
| 577 | if (ln->state <= ND6_LLINFO_INCOMPLETE) {
|
---|
| 578 |
|
---|
| 579 | /* ã¿ã¤ã ã¢ã¦ãã®æå®ããã¼ãªã³ã°ãªãã¿ã¤ã ã¢ã¦ãã§çµäºããã*/
|
---|
| 580 | if (tmout == TMO_POL) {
|
---|
| 581 | error = E_TMOUT;
|
---|
| 582 | goto err_ret;
|
---|
| 583 | }
|
---|
| 584 |
|
---|
| 585 | if (ln->state == ND6_LLINFO_NO_STATE)
|
---|
| 586 | ln->state = ND6_LLINFO_INCOMPLETE;
|
---|
| 587 |
|
---|
| 588 | /* ãã§ã«ãæªè§£æ±ºã®ãããã¯ã¼ã¯ãããã¡ãããã°ãéæ¾ããã*/
|
---|
| 589 | if (ln->hold != NULL) {
|
---|
| 590 | syscall(rel_net_buf(ln->hold));
|
---|
| 591 | }
|
---|
| 592 |
|
---|
| 593 | /*
|
---|
| 594 | * éä¿¡ããã³ãã£ã³ã°ããã
|
---|
| 595 | * IF ã§ãããã¯ã¼ã¯ãããã¡ãéæ¾ããªããã©ã°ãè¨å®ããã¦ããã¨ãã¯ã
|
---|
| 596 | * éä¿¡ããã³ãã£ã³ã°ããªãã
|
---|
| 597 | */
|
---|
| 598 | if ((output->flags & NB_FLG_NOREL_IFOUT) == 0) {
|
---|
| 599 | ln->hold = output;
|
---|
| 600 |
|
---|
| 601 | /* ã¿ã¤ã ã¢ã¦ãã®è¨å® */
|
---|
| 602 | if (tmout == TMO_FEVR)
|
---|
| 603 | ln->tmout = tmout;
|
---|
| 604 | else {
|
---|
| 605 | syscall(get_tim(&now));
|
---|
| 606 | ln->tmout = now + tmout;
|
---|
| 607 | }
|
---|
| 608 | }
|
---|
| 609 | else {
|
---|
| 610 | output->flags &= ~NB_FLG_NOREL_IFOUT;
|
---|
| 611 | syscall(get_tim(&now));
|
---|
| 612 | ln->tmout = now + tmout;
|
---|
| 613 | }
|
---|
| 614 |
|
---|
| 615 | if (ln->expire) {
|
---|
| 616 | if (ln->asked < ND6_MAX_MCAST_QUERY) {
|
---|
| 617 | syscall(get_tim(&now));
|
---|
| 618 | if ((int32_t)(ln->expire - now) < 0) {
|
---|
| 619 | /* ln->expire < now */
|
---|
| 620 | ln->expire += ND6_RETRANS_TIME; /* è¿é£æ¢ç´¢éä¿¡éé */
|
---|
| 621 | ln->asked ++;
|
---|
| 622 | nd6_ns_output(ifp, &in6_addr_unspecified, dst, ln, false);
|
---|
| 623 | }
|
---|
| 624 | }
|
---|
| 625 | }
|
---|
| 626 | return error;
|
---|
| 627 | }
|
---|
| 628 | }
|
---|
| 629 |
|
---|
| 630 | /*
|
---|
| 631 | * éè¤ãæ¤åºãããã¤ã³ã¿ãã§ã¼ã¹ã«ã¯åºåããªãã
|
---|
| 632 | */
|
---|
| 633 | if ((ifp->flags & ND6_IFF_IFDISABLED) != 0) {
|
---|
| 634 | return E_OK;
|
---|
| 635 | }
|
---|
| 636 |
|
---|
| 637 | IF_SET_PROTO(output, IF_PROTO_IPV6);
|
---|
| 638 | error = IF_OUTPUT(output, dst, ln ? & ln->ifaddr : NULL, tmout);
|
---|
| 639 | return error;
|
---|
| 640 |
|
---|
| 641 | err_ret:
|
---|
| 642 | syscall(rel_net_buf(output));
|
---|
| 643 | return error;
|
---|
| 644 | }
|
---|
| 645 |
|
---|
| 646 | /*
|
---|
| 647 | * nd6_storelladdr -- åºåãããããã¯ã¼ã¯ã¤ã³ã¿ãã§ã¼ã¹ã®ã¢ãã¬ã¹ãè¿ãã
|
---|
| 648 | */
|
---|
| 649 |
|
---|
| 650 | ER
|
---|
| 651 | nd6_storelladdr (T_IF_ADDR *out, const T_IN6_ADDR *dst, T_IF_ADDR *ifa)
|
---|
| 652 | {
|
---|
| 653 | if (IN6_IS_ADDR_MULTICAST(dst)) {
|
---|
| 654 | IF_IN6_RESOLVE_MULTICAST(out, dst);
|
---|
| 655 | }
|
---|
| 656 | else {
|
---|
| 657 | *out = *ifa;
|
---|
| 658 | }
|
---|
| 659 |
|
---|
| 660 | return E_OK;
|
---|
| 661 | }
|
---|
| 662 |
|
---|
| 663 | /*
|
---|
| 664 | * nd6_option -- è¿é£æ¢ç´¢ãªãã·ã§ã³ã®å¦ç
|
---|
| 665 | *
|
---|
| 666 | * 注æ: ãªãã·ã§ã³ãªãã»ããé
|
---|
| 667 | åã«ã¯ããªãã»ãã + 8 ãè¨å®ããã¦ããã
|
---|
| 668 | */
|
---|
| 669 |
|
---|
| 670 | ER
|
---|
| 671 | nd6_options (uint8_t *opt, void *nh, uint_t len)
|
---|
| 672 | {
|
---|
| 673 | T_ND_OPT_HDR *opth;
|
---|
| 674 | ER error = E_OK;
|
---|
| 675 | int_t pi_count = 0; /* ãã¬ãã£ãã¯ã¹æ
|
---|
| 676 | å ±ã®åæ° */
|
---|
| 677 |
|
---|
| 678 | opth = (T_ND_OPT_HDR *)nh;
|
---|
| 679 | memset(opt, 0, ND_OPT_OFF_ARRAY_SIZE);
|
---|
| 680 |
|
---|
| 681 | while (error == E_OK && ((uint8_t *)opth - (uint8_t *)nh) < (256 - 8) && len > 0) {
|
---|
| 682 |
|
---|
| 683 | /* ãªãã·ã§ã³é·ã 0 ã®æã¯ãä¸æ£ãªãªãã·ã§ã³ã¨ãã¦å¦çããã*/
|
---|
| 684 | if (opth->len == 0) {
|
---|
| 685 | error = E_PAR;
|
---|
| 686 | break;
|
---|
| 687 | }
|
---|
| 688 |
|
---|
| 689 | /* ãªãã·ã§ã³ã®ã¿ã¤ãã«ããåå²ããã*/
|
---|
| 690 | switch (opth->type) {
|
---|
| 691 | case ND_OPT_SOURCE_LINKADDR: /* éä¿¡å
|
---|
| 692 | ãããã¯ã¼ã¯ã¤ã³ã¿ãã§ã¼ã¹ã®ã¢ãã¬ã¹ */
|
---|
| 693 | case ND_OPT_TARGET_LINKADDR: /* 対象ãããã¯ã¼ã¯ã¤ã³ã¿ãã§ã¼ã¹ã®ã¢ãã¬ã¹ */
|
---|
| 694 | case ND_OPT_REDIRECTED_HEADER: /* ãªãã¤ã¬ã¯ãã»ããã */
|
---|
| 695 | case ND_OPT_MTU: /* MTU */
|
---|
| 696 | if (opt[ND_OPT_OFF_ARRAY_IX(opth->type)]) {
|
---|
| 697 | /* ãã¬ãã£ãã¯ã¹æ
|
---|
| 698 | å ±ä»¥å¤ã®åããªãã·ã§ã³ãè¤æ°æå®ããã¦ããã*/
|
---|
| 699 | error = E_PAR;
|
---|
| 700 | }
|
---|
| 701 | else {
|
---|
| 702 | opt[ND_OPT_OFF_ARRAY_IX(opth->type)] = (uint8_t *)opth - (uint8_t *)nh + 8;
|
---|
| 703 | }
|
---|
| 704 | break;
|
---|
| 705 | case ND_OPT_PREFIX_INFORMATION: /* ãã¬ãã£ãã¯ã¹æ
|
---|
| 706 | å ± */
|
---|
| 707 | if (!opt[ND_OPT_OFF_ARRAY_IX(ND_OPT_PREFIX_INFORMATION)]) {
|
---|
| 708 | /*
|
---|
| 709 | * ãã¬ãã£ãã¯ã¹æ
|
---|
| 710 | å ±ã¯æåã«ç¾ãããªãã»ããã®ã¿è¨é²ããã
|
---|
| 711 | */
|
---|
| 712 | opt[ND_OPT_OFF_ARRAY_IX(opth->type)] = (uint8_t *)opth - (uint8_t *)nh + 8;
|
---|
| 713 | }
|
---|
| 714 | pi_count ++;
|
---|
| 715 | break;
|
---|
| 716 | default:
|
---|
| 717 | /*
|
---|
| 718 | * å°æ¥å®ç¾©ããããããã³ã«ã¸ã®æ¡å¼µã«å¯¾å¿ããããã
|
---|
| 719 | * èªèã§ããªããªãã·ã§ã³ã¯åã«ç¡è¦ããå¦çãç¶è¡ããã
|
---|
| 720 | */
|
---|
| 721 | break;
|
---|
| 722 | }
|
---|
| 723 | len -= opth->len << 3; /* ãªãã·ã§ã³é·ã®åä½ã¯ 8 ãã¤ã */
|
---|
| 724 | opth = (T_ND_OPT_HDR *)((uint8_t *)opth + (opth->len << 3));
|
---|
| 725 | }
|
---|
| 726 |
|
---|
| 727 | opt[ND_OPT_OFF_ARRAY_IX(ND_OPT_PREFIX_INFO_COUNT)] = pi_count;
|
---|
| 728 | return error;
|
---|
| 729 | }
|
---|
| 730 |
|
---|
| 731 | #endif /* of #ifdef _IP6_CFG */
|
---|