[270] | 1 | /*
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| 2 | * TINET (TCP/IP Protocol Stack)
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| 3 | *
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| 4 | * Copyright (C) 2001-2009 by Dep. of Computer Science and Engineering
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| 5 | * Tomakomai National College of Technology, JAPAN
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| 6 | *
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| 7 | * ä¸è¨èä½æ¨©è
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| 8 | ã¯ï¼ä»¥ä¸ã® (1)ï½(4) ã®æ¡ä»¶ãï¼Free Software Foundation
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| 9 | * ã«ãã£ã¦å
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| 10 | ¬è¡¨ããã¦ãã GNU General Public License ã® Version 2 ã«è¨
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| 11 | * è¿°ããã¦ããæ¡ä»¶ãæºããå ´åã«éãï¼æ¬ã½ããã¦ã§ã¢ï¼æ¬ã½ããã¦ã§ã¢
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| 12 | * ãæ¹å¤ãããã®ãå«ãï¼ä»¥ä¸åãï¼ã使ç¨ã»è¤è£½ã»æ¹å¤ã»åé
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| 13 | å¸ï¼ä»¥ä¸ï¼
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| 14 | * å©ç¨ã¨å¼ã¶ï¼ãããã¨ãç¡åã§è¨±è«¾ããï¼
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| 15 | * (1) æ¬ã½ããã¦ã§ã¢ãã½ã¼ã¹ã³ã¼ãã®å½¢ã§å©ç¨ããå ´åã«ã¯ï¼ä¸è¨ã®èä½
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| 16 | * 権表示ï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãï¼ãã®ã¾ã¾ã®å½¢ã§ã½ã¼
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| 17 | * ã¹ã³ã¼ãä¸ã«å«ã¾ãã¦ãããã¨ï¼
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| 18 | * (2) æ¬ã½ããã¦ã§ã¢ãï¼ã©ã¤ãã©ãªå½¢å¼ãªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
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| 19 | * ç¨ã§ããå½¢ã§åé
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| 20 | å¸ããå ´åã«ã¯ï¼åé
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| 21 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨
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| 22 | * è
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| 23 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®èä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨
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| 24 | * ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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| 25 | * (3) æ¬ã½ããã¦ã§ã¢ãï¼æ©å¨ã«çµã¿è¾¼ããªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
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| 26 | * ç¨ã§ããªãå½¢ã§åé
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| 27 | å¸ããå ´åã«ã¯ï¼æ¬¡ã®æ¡ä»¶ãæºãããã¨ï¼
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| 28 | * (a) åé
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| 29 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨è
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| 30 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®è
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| 31 | * ä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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| 32 | * (4) æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´æ¥çã¾ãã¯éæ¥çã«çãããããªãæ
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| 33 | * 害ãããï¼ä¸è¨èä½æ¨©è
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| 34 | ããã³TOPPERSããã¸ã§ã¯ããå
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| 35 | 責ãããã¨ï¼
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| 36 | *
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| 37 | * æ¬ã½ããã¦ã§ã¢ã¯ï¼ç¡ä¿è¨¼ã§æä¾ããã¦ãããã®ã§ããï¼ä¸è¨èä½æ¨©è
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| 38 | ã
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| 39 | * ãã³TOPPERSããã¸ã§ã¯ãã¯ï¼æ¬ã½ããã¦ã§ã¢ã«é¢ãã¦ï¼ãã®é©ç¨å¯è½æ§ã
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| 40 | * å«ãã¦ï¼ãããªãä¿è¨¼ãè¡ããªãï¼ã¾ãï¼æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´
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| 41 | * æ¥çã¾ãã¯éæ¥çã«çãããããªãæ害ã«é¢ãã¦ãï¼ãã®è²¬ä»»ãè² ããªãï¼
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| 42 | *
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| 43 | * @(#) $Id: nd6_rtr.c 270 2017-02-09 04:03:47Z coas-nagasima $
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| 44 | */
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| 45 |
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| 46 | /* $FreeBSD: src/sys/netinet6/nd6_rtr.c,v 1.11 2002/04/19 04:46:23 suz Exp $ */
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| 47 | /* $KAME: nd6_rtr.c,v 1.111 2001/04/27 01:37:15 jinmei Exp $ */
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| 48 |
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| 49 | /*
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| 50 | * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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| 51 | * All rights reserved.
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| 52 | *
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| 53 | * Redistribution and use in source and binary forms, with or without
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| 54 | * modification, are permitted provided that the following conditions
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| 55 | * are met:
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| 56 | * 1. Redistributions of source code must retain the above copyright
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| 57 | * notice, this list of conditions and the following disclaimer.
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| 58 | * 2. Redistributions in binary form must reproduce the above copyright
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| 59 | * notice, this list of conditions and the following disclaimer in the
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| 60 | * documentation and/or other materials provided with the distribution.
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| 61 | * 3. Neither the name of the project nor the names of its contributors
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| 62 | * may be used to endorse or promote products derived from this software
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| 63 | * without specific prior written permission.
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| 64 | *
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| 65 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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| 66 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 67 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 68 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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| 69 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 70 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 71 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 72 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 73 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 74 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 75 | * SUCH DAMAGE.
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| 76 | */
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| 77 |
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| 78 | #include <string.h>
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| 79 |
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| 80 | #ifdef TARGET_KERNEL_ASP
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| 81 |
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| 82 | #include <kernel.h>
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| 83 | #include <sil.h>
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| 84 | #include <t_syslog.h>
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| 85 | #include "kernel_cfg.h"
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| 86 |
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| 87 | #endif /* of #ifdef TARGET_KERNEL_ASP */
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| 88 |
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| 89 | #ifdef TARGET_KERNEL_JSP
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| 90 |
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| 91 | #include <s_services.h>
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| 92 | #include <t_services.h>
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| 93 | #include "kernel_id.h"
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| 94 |
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| 95 | #endif /* of #ifdef TARGET_KERNEL_JSP */
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| 96 |
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| 97 | #include <tinet_defs.h>
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| 98 | #include <tinet_config.h>
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| 99 |
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| 100 | #include <net/if.h>
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| 101 | #include <net/if_ppp.h>
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| 102 | #include <net/if_loop.h>
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| 103 | #include <net/ethernet.h>
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| 104 | #include <net/if_arp.h>
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| 105 | #include <net/ppp_ipcp.h>
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| 106 | #include <net/net.h>
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| 107 | #include <net/net_var.h>
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| 108 | #include <net/net_buf.h>
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| 109 | #include <net/net_timer.h>
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| 110 | #include <net/net_count.h>
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| 111 |
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| 112 | #include <netinet/in.h>
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| 113 | #include <netinet/in_var.h>
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| 114 | #include <netinet6/in6.h>
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| 115 | #include <netinet6/in6_var.h>
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| 116 | #include <netinet6/nd6.h>
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| 117 | #include <netinet6/in6_ifattach.h>
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| 118 | #include <netinet/ip6.h>
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| 119 | #include <netinet/icmp6.h>
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| 120 | #include <netinet6/ip6_var.h>
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| 121 |
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| 122 | #include <net/if6_var.h>
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| 123 |
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| 124 | /*
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| 125 | * å¤é¨é¢æ°ã®å®ç¾©
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| 126 | */
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| 127 |
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| 128 | extern const char *itron_strerror (ER ercd);
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| 129 |
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| 130 | #ifdef SUPPORT_INET6
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| 131 |
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| 132 | #if NUM_ND6_DEF_RTR_ENTRY > 0
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| 133 |
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| 134 | /*
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| 135 | * å
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| 136 | ¨åå¤æ°
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| 137 | */
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| 138 |
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| 139 | SYSTIM nd6_base_reachable_time = ND6_DEF_REACHABLE_TIME; /* ã«ã¼ã¿ããéç¥ãããå¤ */
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| 140 | SYSTIM nd6_reachable_time = ND6_DEF_REACHABLE_TIME; /* ã«ã¼ã¿ããéç¥ãããå¤ã®è£æ£å¤ */
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| 141 | SYSTIM nd6_recalc_reachtm_interval = ND6_RECALC_REACHTM_INTERVAL; /* å°éå¯è½ç¶æ
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| 142 | ã®æå¹æéåè¨ç®éé */
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| 143 | SYSTIM nd6_retrans_time = ND6_DEF_RETRANS_TIME; /* è¿é£æ¢ç´¢ã®éä¿¡éé */
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| 144 | uint8_t ip6_defhlim = IPV6_DEFHLIM; /* ããããªãããã®è¦å®å¤ */
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| 145 |
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| 146 | /*
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| 147 | * å±æå¤æ°
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| 148 | */
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| 149 |
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| 150 | /*
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| 151 | * ãã¬ãã£ãã¯ã¹ã»ãªã¹ã
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| 152 | */
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| 153 |
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| 154 | static T_ND6_PREFIX nd6_prefix[NUM_ND6_PREFIX_ENTRY];
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| 155 |
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| 156 | /*
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| 157 | * ãã£ãã©ã«ãã«ã¼ã¿ã»ãªã¹ã
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| 158 | */
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| 159 |
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| 160 | static T_DEF_ROUTER nd6_def_router[NUM_ND6_DEF_RTR_ENTRY];
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| 161 | static uint_t def_router_count = 0; /* ãªã¹ãã«ããã«ã¼ã¿æ° */
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| 162 |
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| 163 | /*
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| 164 | * make_mask -- ãããç¨ã®ãã¹ã¯ãçæããã
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| 165 | */
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| 166 |
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| 167 | static uint_t
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| 168 | make_mask (int_t index)
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| 169 | {
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| 170 | uint_t mask;
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| 171 | int_t ix;
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| 172 |
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| 173 | /* ãã¹ã¯ãçæããã*/
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| 174 | mask = 1;
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| 175 | for (ix = index; ix -- > 0; )
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| 176 | mask <<= 1;
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| 177 |
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| 178 | return mask;
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| 179 | }
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| 180 |
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| 181 | /*
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| 182 | * find_pfxlist_reachable_router --
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| 183 | * æå®ãããã¬ãã£ãã¯ã¹ãéç¥ããã«ã¼ã¿ããªã³ã¯ä¸ã«åå¨ããããã§ãã¯ããã
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| 184 | */
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| 185 |
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| 186 | static T_DEF_ROUTER *
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| 187 | find_pfxlist_reachable_router (T_ND6_PREFIX *pr)
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| 188 | {
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| 189 | T_DEF_ROUTER *dr = NULL;
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| 190 | T_LLINFO_ND6 *ln;
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| 191 | uint_t mask;
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| 192 | int_t ix;
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| 193 |
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| 194 | mask = 1;
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| 195 | for (ix = 0; ix < def_router_count; ix ++) {
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| 196 | if ((pr->routermap & mask) != 0) {
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| 197 | if ((ln = nd6_lookup(&nd6_def_router[ix].addr, false)) != NULL &&
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| 198 | ND6_IS_LLINFO_PROBREACH(ln))
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| 199 | return dr;
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| 200 | }
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| 201 | mask <<= 1;
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| 202 | }
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| 203 | return NULL;
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| 204 | }
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| 205 |
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| 206 | /*
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| 207 | * pfxlist_onlink_check -- ãã¬ãã£ãã¯ã¹ã»ãªã¹ãã®ãªã³ãªã³ã¯ç¶æ
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| 208 | ããã§ãã¯ããã
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| 209 | *
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| 210 | * 注æ: ãã®é¢æ°ãå¼ã³åºãã¨ãã¯ãSEM_ND6_DEFRTRLIST ã§ã
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| 211 | * ããã¯ãã¦ããå¼ã³åºããã¨ã
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| 212 | */
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| 213 |
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| 214 | static void
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| 215 | pfxlist_onlink_check (void)
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| 216 | {
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| 217 | T_IFNET *ifp = IF_GET_IFNET();
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| 218 | T_ND6_PREFIX *pr = NULL;
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| 219 | T_IN6_IFADDR *ia;
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| 220 | ER error;
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| 221 | int_t ix;
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| 222 |
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| 223 | for (ix = NUM_ND6_PREFIX_ENTRY; ix -- > 0; ) {
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| 224 | pr = &nd6_prefix[ix];
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| 225 | if ((pr->flags & ND6_PREFIX_FLAG_ONLINK) != 0 &&
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| 226 | find_pfxlist_reachable_router(pr))
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| 227 | break;
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| 228 | }
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| 229 |
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| 230 | if (ix >= 0) {
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| 231 | /*
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| 232 | * ãªã³ãªã³ã¯ç¶æ
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| 233 | ã®ãã¬ãã£ãã¯ã¹ãæä½ä¸ã¤åå¨ããã¨ãã®å¦çã
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| 234 | * åãã¬ãã£ãã¯ã¹ã®ãªã³ãªã³ã¯ç¶æ
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| 235 | ããããããéç¥ãã¦ããã«ã¼ã¿ã®
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| 236 | * ç¶æ
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| 237 | ã«å¾ã£ã¦è¨å®ããã
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| 238 | */
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| 239 |
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| 240 |
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| 241 | for (ix = NUM_ND6_PREFIX_ENTRY; ix -- > 0; ) {
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| 242 | pr = &nd6_prefix[ix];
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| 243 |
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| 244 | if ((pr->flags & ND6_PREFIX_FLAG_ONLINK) == 0)
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| 245 | continue;
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| 246 |
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| 247 | if ((pr->flags & ND6_PREFIX_STATE_DETACHED) == 0 &&
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| 248 | find_pfxlist_reachable_router(pr) == NULL)
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| 249 | pr->flags |= ND6_PREFIX_STATE_DETACHED;
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| 250 |
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| 251 | if ((pr->flags & ND6_PREFIX_STATE_DETACHED) != 0 &&
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| 252 | find_pfxlist_reachable_router(pr) != NULL)
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| 253 | pr->flags &= ~ND6_PREFIX_STATE_DETACHED;
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| 254 | }
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| 255 | }
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| 256 | else {
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| 257 | /*
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| 258 | * ã©ã®ãã¬ãã£ãã¯ã¹ããªã³ãªã³ã¯ã§ã¯ãªãã
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| 259 | * ãã£ãã©ã«ãã«ã¼ã¿ãåå¨ããªãã¨ãã®å¦çã
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| 260 | * ãã¹ã¦ã®ãã¬ãã£ãã¯ã¹ã使ç¨å¯è½ç¶æ
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| 261 | ã«è¨å®ããã
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| 262 | */
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| 263 |
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| 264 |
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| 265 | for (ix = NUM_ND6_PREFIX_ENTRY; ix -- > 0; ) {
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| 266 | pr = &nd6_prefix[ix];
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| 267 |
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| 268 | if ((pr->flags & ND6_PREFIX_FLAG_ONLINK) == 0)
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| 269 | continue;
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| 270 |
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| 271 | if ((pr->flags & ND6_PREFIX_STATE_DETACHED) != 0)
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| 272 | pr->flags &= ~ND6_PREFIX_STATE_DETACHED;
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| 273 | }
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| 274 | }
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| 275 |
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| 276 | /*
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| 277 | * åãã¬ãã£ãã¯ã¹æ¯ã«ãéç¥ãã¦ããã«ã¼ã¿ã®ç¶æ
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| 278 | ã¨
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| 279 | * ãªã³ãªã³ã¯ã®ç¶æ
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| 280 | ãä¸è´ããªããã°ããªã³ãªã³ã¯ç¶æ
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| 281 | ãæ´æ°ããã
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| 282 | */
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| 283 | for (ix = NUM_ND6_PREFIX_ENTRY; ix -- > 0; ) {
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| 284 | pr = &nd6_prefix[ix];
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| 285 |
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| 286 | if ((pr->flags & ND6_PREFIX_FLAG_ONLINK) == 0)
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| 287 | continue;
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| 288 |
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| 289 | if ((pr->flags & ND6_PREFIX_STATE_DETACHED) != 0 &&
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| 290 | (pr->flags & ND6_PREFIX_STATE_ONLINK ) != 0) {
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| 291 | if ((error = nd6_prefix_offlink(pr)) != E_OK)
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| 292 | syslog(LOG_ERROR, "[ND6 RTR] prefix offlink failed: %s", itron_strerror(error));
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| 293 | }
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| 294 |
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| 295 | if ((pr->flags & ND6_PREFIX_STATE_DETACHED) == 0 &&
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| 296 | (pr->flags & ND6_PREFIX_STATE_ONLINK ) == 0 &&
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| 297 | (pr->flags & ND6_PREFIX_FLAG_ONLINK ) == 0) {
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| 298 | if ((error = nd6_prefix_onlink(pr)) != E_OK)
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| 299 | syslog(LOG_ERROR, "[ND6 RTR] prefix onlink failed: %s", itron_strerror(error));
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| 300 | }
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| 301 | }
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| 302 |
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| 303 | /*
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| 304 | * ãªã³ã¯ä¸ã«ãã¬ãã£ãã¯ã¹ãéç¥ãã¦ããã«ã¼ã¿ã
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| 305 | * å°ãªãã¨ã 1 å°åå¨ããã確èªããã
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| 306 | */
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| 307 | for (ix = NUM_IN6_IFADDR_ENTRY; ix -- > 0; ) {
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| 308 | ia = &ifp->in_ifaddrs[ix];
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| 309 | if ((ia->flags & (IN6_IFF_DEFINED | IN6_IFF_AUTOCONF)) != 0 &&
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| 310 | ia->prefix_index != ND6_PREFIX_IX_INVALID) {
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| 311 | pr = &nd6_prefix[ia->prefix_index];
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| 312 | if (find_pfxlist_reachable_router(pr) != NULL)
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| 313 | break;
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| 314 | }
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| 315 | }
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| 316 |
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| 317 | if (ix >= 0) {
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| 318 | /*
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| 319 | * ãªã³ã¯ä¸ã«ãã¬ãã£ãã¯ã¹ãéç¥ãã¦ããã«ã¼ã¿ã
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| 320 | * å°ãªãã¨ã 1 å°åå¨ããæã®å¦çã
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| 321 | */
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| 322 | for (ix = NUM_IN6_IFADDR_ENTRY; ix -- > 0; ) {
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| 323 | ia = &ifp->in_ifaddrs[ix];
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| 324 | if ((ia->flags & (IN6_IFF_DEFINED | IN6_IFF_AUTOCONF)) != 0 &&
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| 325 | ia->prefix_index != ND6_PREFIX_IX_INVALID) {
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| 326 | pr = &nd6_prefix[ia->prefix_index];
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| 327 | if (find_pfxlist_reachable_router(pr) != NULL)
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| 328 | ia->flags &= ~IN6_IFF_DETACHED;
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| 329 | else
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| 330 | ia->flags |= IN6_IFF_DETACHED;
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| 331 | }
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| 332 | }
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| 333 | }
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| 334 | else {
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| 335 | /*
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| 336 | * ãªã³ã¯ä¸ã«ãã¬ãã£ãã¯ã¹ãéç¥ãã¦ããã«ã¼ã¿ã
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| 337 | * 1 å°åå¨ããªãæã¯å
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| 338 | ¨ã¦ã®ã¢ãã¬ã¹ãå©ç¨ã§ããããã«ããã
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| 339 | */
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| 340 | for (ix = NUM_IN6_IFADDR_ENTRY; ix -- > 0; ) {
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| 341 | ia = &ifp->in_ifaddrs[ix];
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| 342 | if ((ia->flags & (IN6_IFF_DEFINED | IN6_IFF_AUTOCONF)) != 0)
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| 343 | ia->flags &= ~IN6_IFF_DETACHED;
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| 344 | }
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| 345 | }
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| 346 | }
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| 347 |
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| 348 | /*
|
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| 349 | * pfxrtr_add -- ãã¬ãã£ãã¯ã¹ã¨ã³ããªã¨ãã£ãã©ã«ãã«ã¼ã¿ã»ã¨ã³ããªããªã³ã¯ããã
|
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| 350 | *
|
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| 351 | * 注æ: ãã®é¢æ°ãå¼ã³åºãã¨ãã¯ãSEM_ND6_DEFRTRLIST ã§ã
|
---|
| 352 | * ããã¯ãã¦ããå¼ã³åºããã¨ã
|
---|
| 353 | */
|
---|
| 354 |
|
---|
| 355 | static void
|
---|
| 356 | pfxrtr_add (int_t prefix_index, int_t rtr_index)
|
---|
| 357 | {
|
---|
| 358 | /* ãã¬ãã£ãã¯ã¹ã¨ã³ããªã¨ãã£ãã©ã«ãã«ã¼ã¿ã»ã¨ã³ããªããªã³ã¯ããã*/
|
---|
| 359 | nd6_prefix[prefix_index].routermap |= make_mask(rtr_index);
|
---|
| 360 | nd6_def_router[rtr_index].plistmap |= make_mask(prefix_index);
|
---|
| 361 |
|
---|
| 362 | pfxlist_onlink_check();
|
---|
| 363 | }
|
---|
| 364 |
|
---|
| 365 | /*
|
---|
| 366 | * nd6_pfxrtr_lookup -- ãã¬ãã£ãã¯ã¹ã¨ã³ããªããã«ã¼ã¿ãæ¢ç´¢ããã
|
---|
| 367 | */
|
---|
| 368 |
|
---|
| 369 | static uint_t
|
---|
| 370 | pfxrtr_lookup (const T_ND6_PREFIX *pr, int_t rtr_index)
|
---|
| 371 | {
|
---|
| 372 | return (pr->routermap & make_mask(rtr_index)) == 0 ? IN6_RTR_IX_UNREACH : rtr_index;
|
---|
| 373 | }
|
---|
| 374 |
|
---|
| 375 | /*
|
---|
| 376 | * defrouter_select -- åªå
|
---|
| 377 | ãã£ãã©ã«ãã»ã«ã¼ã¿ãé¸æããªããã
|
---|
| 378 | *
|
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| 379 | * 注æ: ãã®é¢æ°ãå¼ã³åºãã¨ãã¯ãSEM_ND6_DEFRTRLIST ã§ã
|
---|
| 380 | * ããã¯ãã¦ããå¼ã³åºããã¨ã
|
---|
| 381 | */
|
---|
| 382 |
|
---|
| 383 | static void
|
---|
| 384 | defrouter_select (void)
|
---|
| 385 | {
|
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| 386 | T_DEF_ROUTER *dr = NULL, router;
|
---|
| 387 | T_LLINFO_ND6 *ln;
|
---|
| 388 | int_t ix, tix;
|
---|
| 389 |
|
---|
| 390 | for (ix = 0; ix < def_router_count; ix ++) {
|
---|
| 391 | dr = &nd6_def_router[ix];
|
---|
| 392 | if ((ln = nd6_lookup(&dr->addr, false)) != NULL && ND6_IS_LLINFO_PROBREACH(ln)) {
|
---|
| 393 |
|
---|
| 394 | /* é¸æããã«ã¼ã¿ãå
|
---|
| 395 | é ã«ç§»ãã*/
|
---|
| 396 | router = *dr;
|
---|
| 397 | for (tix = ix; tix > 0; tix --)
|
---|
| 398 | nd6_def_router[tix] = nd6_def_router[tix - 1];
|
---|
| 399 | nd6_def_router[0] = router;
|
---|
| 400 | break;
|
---|
| 401 | }
|
---|
| 402 | }
|
---|
| 403 | }
|
---|
| 404 |
|
---|
| 405 | /*
|
---|
| 406 | * defrtrlist_update -- ãã£ãã©ã«ãã«ã¼ã¿ã»ãªã¹ããæ´æ°ããã
|
---|
| 407 | *
|
---|
| 408 | * æ»ãå¤ã¯ãã«ã¼ã¿ã®ã¤ã³ããã¯ã¹ã
|
---|
| 409 | * ãã ããå¤ã -1 ãªãããã¬ãã£ãã¯ã¹ã»ãªã¹ãã¯æ´æ°ããªãã
|
---|
| 410 | */
|
---|
| 411 |
|
---|
| 412 | static int_t
|
---|
| 413 | defrtrlist_update (T_IN6_ADDR *src, uint32_t lifetime, uint8_t flags)
|
---|
| 414 | {
|
---|
| 415 | T_DEF_ROUTER *dr, *fdr = NULL;
|
---|
| 416 | SYSTIM now;
|
---|
| 417 | int_t ix;
|
---|
| 418 |
|
---|
| 419 | syscall(get_tim(&now));
|
---|
| 420 | syscall(wai_sem(SEM_ND6_DEFRTRLIST));
|
---|
| 421 |
|
---|
| 422 | /* ç»é²æ¸ã調ã¹ãã*/
|
---|
| 423 | if ((fdr = nd6_defrtrlist_lookup(src)) != NULL) {
|
---|
| 424 | /* ç»é²æ¸ã¿ã®å ´åã®å¦ç */
|
---|
| 425 | if (lifetime == 0) {
|
---|
| 426 | nd6_defrtrlist_del(fdr);
|
---|
| 427 | syscall(sig_sem(SEM_ND6_DEFRTRLIST));
|
---|
| 428 | return -1;
|
---|
| 429 | }
|
---|
| 430 | else {
|
---|
| 431 | fdr->lifetime = lifetime * SYSTIM_HZ; /* lifetime ã®åä½ã¯ç§ */
|
---|
| 432 | fdr->flags = flags;
|
---|
| 433 | fdr->expire = now + fdr->lifetime;
|
---|
| 434 | syscall(sig_sem(SEM_ND6_DEFRTRLIST));
|
---|
| 435 | return fdr - nd6_def_router;
|
---|
| 436 | }
|
---|
| 437 | }
|
---|
| 438 | else if (lifetime == 0) {
|
---|
| 439 | syscall(sig_sem(SEM_ND6_DEFRTRLIST));
|
---|
| 440 | return -1;
|
---|
| 441 | }
|
---|
| 442 |
|
---|
| 443 | if (fdr == NULL && def_router_count < NUM_ND6_DEF_RTR_ENTRY) {
|
---|
| 444 | /*
|
---|
| 445 | * def_router_count < NUM_ND6_DEF_RTR_ENTRY ã§ããã°ã
|
---|
| 446 | * nd6_def_router[def_router_count]; ã空ãã¨ã³ããª
|
---|
| 447 | */
|
---|
| 448 | fdr = &nd6_def_router[def_router_count];
|
---|
| 449 | }
|
---|
| 450 |
|
---|
| 451 | /* 空ãã¨ã³ããªããªããã°ãæå¹æéãçãã¨ã³ããªãåé¤ããã*/
|
---|
| 452 | if (fdr == NULL) {
|
---|
| 453 | T_DEF_ROUTER *sdr = NULL;
|
---|
| 454 | int32_t diff, sdiff = 0xffffffff;
|
---|
| 455 |
|
---|
| 456 | for (ix = def_router_count; ix -- > 0; ) {
|
---|
| 457 | dr = &nd6_def_router[ix];
|
---|
| 458 | diff = (int32_t)(dr->expire - now);
|
---|
| 459 | if (diff <= 0) { /* dr->expire <= now */
|
---|
| 460 | /* æ¢ã«ãæå¹æéãéãã¦ããã*/
|
---|
| 461 | sdr = dr;
|
---|
| 462 | break;
|
---|
| 463 | }
|
---|
| 464 | else if (diff < sdiff)
|
---|
| 465 | sdr = dr;
|
---|
| 466 | }
|
---|
| 467 | if (sdr != NULL) {
|
---|
| 468 | fdr = sdr;
|
---|
| 469 | nd6_defrtrlist_del(fdr);
|
---|
| 470 | }
|
---|
| 471 | }
|
---|
| 472 |
|
---|
| 473 | /* åã¡ã³ãã«å¤ãè¨å®ããã*/
|
---|
| 474 | fdr->plistmap = 0;
|
---|
| 475 | fdr->addr = *src;
|
---|
| 476 | fdr->lifetime = lifetime * SYSTIM_HZ; /* lifetime ã®åä½ã¯ç§ */
|
---|
| 477 | fdr->flags = flags;
|
---|
| 478 | fdr->expire = now + fdr->lifetime;
|
---|
| 479 | fdr->state = ND6_DEF_RTR_BUSY;
|
---|
| 480 | def_router_count ++;
|
---|
| 481 |
|
---|
| 482 | /*
|
---|
| 483 | * ãã£ãã©ã«ãã«ã¼ã¿ã¨ãã¦ç»é²ãããã
|
---|
| 484 | * æ¢ã«ãã£ãã©ã«ãã«ã¼ã¿ãããã°é¸æããªãããªãã
|
---|
| 485 | */
|
---|
| 486 | if (fdr - nd6_def_router != 0)
|
---|
| 487 | defrouter_select();
|
---|
| 488 |
|
---|
| 489 | syscall(sig_sem(SEM_ND6_DEFRTRLIST));
|
---|
| 490 | return fdr - nd6_def_router;
|
---|
| 491 | }
|
---|
| 492 |
|
---|
| 493 | /*
|
---|
| 494 | * in6_ifadd -- ã¤ã³ã¿ãã§ã¼ã¹ã«ã¢ãã¬ã¹ã追å ããã
|
---|
| 495 | */
|
---|
| 496 |
|
---|
| 497 | static ER
|
---|
| 498 | in6_ifadd (T_ND6_PREFIX *pr, T_IN6_IFADDR *ia, int_t router_index)
|
---|
| 499 | {
|
---|
| 500 | T_IFNET *ifp = IF_GET_IFNET();
|
---|
| 501 | T_IN6_ADDR mask, addr;
|
---|
| 502 | T_IN6_IFADDR *lla;
|
---|
| 503 | int_t ix;
|
---|
| 504 |
|
---|
| 505 | lla = &ifp->in_ifaddrs[IPV6_IFADDR_IX_LINKLOCAL];
|
---|
| 506 |
|
---|
| 507 | /*
|
---|
| 508 | * ãªã³ã¯ãã¼ã«ã«ã¢ãã¬ã¹ãæªç»é²ã§ããã°ä½ãããªãã
|
---|
| 509 | */
|
---|
| 510 | if ((lla->flags & IN6_IFF_DEFINED) == 0)
|
---|
| 511 | return E_OBJ;
|
---|
| 512 |
|
---|
| 513 | /*
|
---|
| 514 | * ã«ã¼ã¿ããéç¥ããããã¬ãã£ãã¯ã¹é·ãã
|
---|
| 515 | * ãªã³ã¯ãã¼ã«ã«ã¢ãã¬ã¹ã®ãã¬ãã£ãã¯ã¹é·ã¨
|
---|
| 516 | * ç°ãªã£ã¦ããã°ã¨ã©ã¼
|
---|
| 517 | */
|
---|
| 518 | if (lla->prefix_len != pr->prefix_len)
|
---|
| 519 | return E_PAR;
|
---|
| 520 |
|
---|
| 521 | /* ãã¬ãã£ãã¯ã¹ãã¹ã¯ãçæããã*/
|
---|
| 522 | in6_plen2pmask(&mask, pr->prefix_len);
|
---|
| 523 |
|
---|
| 524 | /* ã¢ãã¬ã¹ãçæããã*/
|
---|
| 525 | for (ix = 0; ix < 4; ix ++)
|
---|
| 526 | addr.s6_addr32[ix] = (pr->prefix.s6_addr32[ix] & mask.s6_addr32[ix])
|
---|
| 527 | | ( lla->addr.s6_addr32[ix] & ~mask.s6_addr32[ix]);
|
---|
| 528 |
|
---|
| 529 | /* ãã©ã°ãåæåããã*/
|
---|
| 530 | ia->flags = 0;
|
---|
| 531 |
|
---|
| 532 | return in6_update_ifa(ifp, ia, &addr,
|
---|
| 533 | pr->prefix_len, pr->vltime, pr->pltime,
|
---|
| 534 | router_index, pr - nd6_prefix, IN6_IFF_AUTOCONF);
|
---|
| 535 | }
|
---|
| 536 |
|
---|
| 537 | /*
|
---|
| 538 | * nd6_prefix_lookup -- ãã¬ãã£ãã¯ã¹ãæ¢ç´¢ããã
|
---|
| 539 | */
|
---|
| 540 |
|
---|
| 541 | static T_ND6_PREFIX *
|
---|
| 542 | nd6_prefix_lookup (const T_IN6_ADDR *prefix, uint_t plen)
|
---|
| 543 | {
|
---|
| 544 | T_ND6_PREFIX *pr;
|
---|
| 545 | int_t ix;
|
---|
| 546 |
|
---|
| 547 | for (ix = NUM_ND6_PREFIX_ENTRY; ix -- > 0; ) {
|
---|
| 548 | pr = &nd6_prefix[ix];
|
---|
| 549 | if ((pr->flags & ND6_PREFIX_STATE_BUSY) &&
|
---|
| 550 | pr->prefix_len == plen && IN6_ARE_ADDR_EQUAL(&pr->prefix, prefix))
|
---|
| 551 | return pr;
|
---|
| 552 | }
|
---|
| 553 |
|
---|
| 554 | return NULL;
|
---|
| 555 | }
|
---|
| 556 |
|
---|
| 557 | /*
|
---|
| 558 | * prelist_remove -- ãã¬ãã£ãã¯ã¹ãªã¹ããããã¬ãã£ãã¯ã¹ãåé¤ããã
|
---|
| 559 | *
|
---|
| 560 | * 注æ: ãã®é¢æ°ãå¼ã³åºãã¨ãã¯ãSEM_ND6_DEFRTRLIST ã§ã
|
---|
| 561 | * ããã¯ãã¦ããå¼ã³åºããã¨ã
|
---|
| 562 | */
|
---|
| 563 |
|
---|
| 564 | static void
|
---|
| 565 | prelist_remove (T_ND6_PREFIX *pr)
|
---|
| 566 | {
|
---|
| 567 | ER error = E_OK;
|
---|
| 568 | uint_t mask;
|
---|
| 569 | int_t rix;
|
---|
| 570 |
|
---|
| 571 | /* æå¹æéåãã«ããã*/
|
---|
| 572 | pr->vltime = 0;
|
---|
| 573 | pr->pltime = 0;
|
---|
| 574 |
|
---|
| 575 | if ((pr->flags & ND6_PREFIX_STATE_ONLINK) != 0 &&
|
---|
| 576 | (error = nd6_prefix_offlink(pr)) != E_OK) {
|
---|
| 577 | syslog(LOG_ERROR, "[ND6 RTR] prefix remove failed: %s", itron_strerror(error));
|
---|
| 578 | return;
|
---|
| 579 | }
|
---|
| 580 |
|
---|
| 581 | /* ãã¬ãã£ãã¯ã¹ã¨ã³ããªã¨ãã£ãã©ã«ãã«ã¼ã¿ã»ã¨ã³ããªã®ãªã³ã¯ã解é¤ããã*/
|
---|
| 582 | pr->routermap = 0;
|
---|
| 583 | mask = make_mask(pr - nd6_prefix);
|
---|
| 584 | for (rix = def_router_count; rix --; )
|
---|
| 585 | nd6_def_router[rix].plistmap &= ~mask;
|
---|
| 586 |
|
---|
| 587 | /* ãã¬ãã£ãã¯ã¹ãç¡å¹ã«ããã*/
|
---|
| 588 | pr->flags &= ~ND6_PREFIX_STATE_BUSY;
|
---|
| 589 |
|
---|
| 590 | pfxlist_onlink_check();
|
---|
| 591 | }
|
---|
| 592 |
|
---|
| 593 | /*
|
---|
| 594 | * nd6_prefix_onlink -- ãã¬ãã£ãã¯ã¹ããªã³ãªã³ã¯ã«è¨å®ããã¢ãã¬ã¹ã使ç¨å¯è½ã«ããã
|
---|
| 595 | *
|
---|
| 596 | * 注æ: ãã®é¢æ°ãå¼ã³åºãã¨ãã¯ãSEM_ND6_DEFRTRLIST ã§ã
|
---|
| 597 | * ããã¯ãã¦ããå¼ã³åºããã¨ã
|
---|
| 598 | */
|
---|
| 599 |
|
---|
| 600 | ER
|
---|
| 601 | nd6_prefix_onlink (T_ND6_PREFIX *pr)
|
---|
| 602 | {
|
---|
| 603 | T_IFNET *ifp = IF_GET_IFNET();
|
---|
| 604 | T_IN6_IFADDR *lla, *ia = NULL;
|
---|
| 605 | int_t ix;
|
---|
| 606 |
|
---|
| 607 | /* æ¢ã«ãªã³ãªã³ã¯ç¶æ
|
---|
| 608 | ã«ãªã£ã¦ããå ´åã¯ã¨ã©ã¼ã*/
|
---|
| 609 | if ((pr->flags & ND6_PREFIX_STATE_ONLINK) != 0)
|
---|
| 610 | return E_OBJ;
|
---|
| 611 |
|
---|
| 612 | /* ãªã³ã¯ãã¼ã«ã«ã¢ãã¬ã¹ãæªç»é²ã§ããã°ä½ãããªãã*/
|
---|
| 613 | lla = &ifp->in_ifaddrs[IPV6_IFADDR_IX_LINKLOCAL];
|
---|
| 614 | if ((lla->flags & IN6_IFF_DEFINED) == 0)
|
---|
| 615 | return E_OK;
|
---|
| 616 |
|
---|
| 617 | /*
|
---|
| 618 | * æå®ããããã¬ãã£ãã¯ã¹ãå²ãå½ã¦ããã¦ããã¤ã³ã¿ãã§ã¼ã¹ã®
|
---|
| 619 | * ã¢ãã¬ã¹æ
|
---|
| 620 | å ±ãæ¢ãã
|
---|
| 621 | */
|
---|
| 622 | for (ix = NUM_IN6_IFADDR_ENTRY; ix --; ) {
|
---|
| 623 | ia = &ifp->in_ifaddrs[ix];
|
---|
| 624 | if (ia->prefix_index == (pr - nd6_prefix))
|
---|
| 625 | break;
|
---|
| 626 | }
|
---|
| 627 |
|
---|
| 628 | if (ix >= 0) {
|
---|
| 629 |
|
---|
| 630 | /* ã¢ãã¬ã¹æ
|
---|
| 631 | å ±ã使ç¨å¯è½ã«ããã*/
|
---|
| 632 | ia->flags &= ~IN6_IFF_DETACHED;
|
---|
| 633 |
|
---|
| 634 | /* ãã¬ãã£ãã¯ã¹ããªã³ãªã³ã¯ã«è¨å®ããã*/
|
---|
| 635 | pr->flags |= ND6_PREFIX_STATE_ONLINK;
|
---|
| 636 | }
|
---|
| 637 |
|
---|
| 638 | return E_OK;
|
---|
| 639 | }
|
---|
| 640 |
|
---|
| 641 | /*
|
---|
| 642 | * nd6_prefix_offlink -- ãã¬ãã£ãã¯ã¹ããªããªã³ã¯ã«è¨å®ããã¢ãã¬ã¹ã使ç¨ä¸å¯ã«ããã
|
---|
| 643 | *
|
---|
| 644 | * 注æ: ãã®é¢æ°ãå¼ã³åºãã¨ãã¯ãSEM_ND6_DEFRTRLIST ã§ã
|
---|
| 645 | * ããã¯ãã¦ããå¼ã³åºããã¨ã
|
---|
| 646 | */
|
---|
| 647 |
|
---|
| 648 | ER
|
---|
| 649 | nd6_prefix_offlink (T_ND6_PREFIX *pr)
|
---|
| 650 | {
|
---|
| 651 | T_IFNET *ifp = IF_GET_IFNET();
|
---|
| 652 | T_IN6_IFADDR *ia = NULL;
|
---|
| 653 | int_t ix;
|
---|
| 654 |
|
---|
| 655 | /* æ¢ã«ãªããªã³ã¯ç¶æ
|
---|
| 656 | ã«ãªã£ã¦ããå ´åã¯ã¨ã©ã¼ã*/
|
---|
| 657 | if ((pr->flags & ND6_PREFIX_STATE_ONLINK) == 0)
|
---|
| 658 | return E_OBJ;
|
---|
| 659 |
|
---|
| 660 | /*
|
---|
| 661 | * æå®ããããã¬ãã£ãã¯ã¹ãå²ãå½ã¦ããã¦ããã¤ã³ã¿ãã§ã¼ã¹ã®
|
---|
| 662 | * ã¢ãã¬ã¹æ
|
---|
| 663 | å ±ãæ¢ãã
|
---|
| 664 | */
|
---|
| 665 | for (ix = NUM_IN6_IFADDR_ENTRY; ix --; ) {
|
---|
| 666 | ia = &ifp->in_ifaddrs[ix];
|
---|
| 667 | if (ia->prefix_index == (pr - nd6_prefix))
|
---|
| 668 | break;
|
---|
| 669 | }
|
---|
| 670 |
|
---|
| 671 | if (ix >= 0) {
|
---|
| 672 |
|
---|
| 673 | /* ã¢ãã¬ã¹æ
|
---|
| 674 | å ±ã使ç¨ä¸å¯ã«ããã*/
|
---|
| 675 | ia->flags |= IN6_IFF_DETACHED;
|
---|
| 676 |
|
---|
| 677 | /* ãã¬ãã£ãã¯ã¹ããªããªã³ã¯ã«è¨å®ããã*/
|
---|
| 678 | pr->flags &= ~ND6_PREFIX_STATE_ONLINK;
|
---|
| 679 | }
|
---|
| 680 |
|
---|
| 681 | return E_OK;
|
---|
| 682 | }
|
---|
| 683 |
|
---|
| 684 | /*
|
---|
| 685 | * in6_init_prefix_ltimes -- ãã¬ãã£ãã¯ã¹ã®æå¹æéãè¨å®ããã
|
---|
| 686 | */
|
---|
| 687 |
|
---|
| 688 | static ER
|
---|
| 689 | in6_init_prefix_ltimes (T_ND6_PREFIX *pr)
|
---|
| 690 | {
|
---|
| 691 | SYSTIM now;
|
---|
| 692 |
|
---|
| 693 | /* æ¨å¥¨æå¹æéãæå¹æéããé·ãã¨ãã¯ã¨ã©ã¼ */
|
---|
| 694 | if (pr->pltime > pr->vltime)
|
---|
| 695 | return E_PAR;
|
---|
| 696 |
|
---|
| 697 | syscall(get_tim(&now));
|
---|
| 698 | now /= SYSTIM_HZ;
|
---|
| 699 |
|
---|
| 700 | if (pr->pltime == ND6_INFINITE_LIFETIME)
|
---|
| 701 | pr->preferred = 0;
|
---|
| 702 | else
|
---|
| 703 | pr->preferred = pr->pltime + now;
|
---|
| 704 |
|
---|
| 705 | if (pr->vltime == ND6_INFINITE_LIFETIME)
|
---|
| 706 | pr->expire = 0;
|
---|
| 707 | else
|
---|
| 708 | pr->expire = pr->vltime + now;
|
---|
| 709 |
|
---|
| 710 | return E_OK;
|
---|
| 711 | }
|
---|
| 712 |
|
---|
| 713 | /*
|
---|
| 714 | * nd6_prelist_add -- ãã¬ãã£ãã¯ã¹ãªã¹ãã«ãã¬ãã£ãã¯ã¹ã追å ããã
|
---|
| 715 | *
|
---|
| 716 | * 注æ: ãã®é¢æ°ãå¼ã³åºãã¨ãã¯ãSEM_ND6_DEFRTRLIST ã§ã
|
---|
| 717 | * ããã¯ãã¦ããå¼ã³åºããã¨ã
|
---|
| 718 | */
|
---|
| 719 |
|
---|
| 720 | static T_ND6_PREFIX *
|
---|
| 721 | nd6_prelist_add (T_ND_OPT_PREFIX_INFO *pi, int_t rtr_index)
|
---|
| 722 | {
|
---|
| 723 | T_ND6_PREFIX *pr = NULL;
|
---|
| 724 | int_t ix;
|
---|
| 725 | ER error;
|
---|
| 726 |
|
---|
| 727 | /* ãã¬ãã£ãã¯ã¹ãªã¹ããã空ãã®ãã¬ãã£ãã¯ã¹ã¨ã³ããªãæ¢ç´¢ããã*/
|
---|
| 728 | for (ix = NUM_ND6_PREFIX_ENTRY; ix --; ) {
|
---|
| 729 | pr = &nd6_prefix[ix];
|
---|
| 730 | if ((pr->flags & ND6_PREFIX_STATE_BUSY) == 0)
|
---|
| 731 | break;
|
---|
| 732 | }
|
---|
| 733 |
|
---|
| 734 | /* ãã¬ãã£ãã¯ã¹ãªã¹ãã«ç©ºãããªããã°ã¨ã©ã¼ */
|
---|
| 735 | if (ix < 0)
|
---|
| 736 | return NULL;
|
---|
| 737 |
|
---|
| 738 | pr->flags |= ND6_PREFIX_STATE_BUSY;
|
---|
| 739 |
|
---|
| 740 | /* ãã¬ãã£ãã¯ã¹ã追å ããã*/
|
---|
| 741 | pr->prefix = pi->prefix;
|
---|
| 742 | pr->prefix_len = pi->prefix_len;
|
---|
| 743 |
|
---|
| 744 | /* ãã©ã°ãè¨å®ããã*/
|
---|
| 745 | if ((pi->flags & ND_OPT_PI_FLAG_ONLINK) != 0)
|
---|
| 746 | pr->flags |= ND6_PREFIX_FLAG_ONLINK;
|
---|
| 747 | if ((pi->flags & ND_OPT_PI_FLAG_AUTO) != 0)
|
---|
| 748 | pr->flags |= ND6_PREFIX_FLAG_AUTO;
|
---|
| 749 |
|
---|
| 750 | /* ãã¬ãã£ãã¯ã¹ã®æå¹æéãè¨å®ããã*/
|
---|
| 751 | pr->vltime = ntohl(pi->valid);
|
---|
| 752 | pr->pltime = ntohl(pi->preferred);
|
---|
| 753 | in6_init_prefix_ltimes(pr);
|
---|
| 754 |
|
---|
| 755 | if ((pr->flags & ND6_PREFIX_FLAG_ONLINK) != 0) {
|
---|
| 756 | if ((error = nd6_prefix_onlink(pr)) != E_OK)
|
---|
| 757 | return NULL;
|
---|
| 758 | }
|
---|
| 759 |
|
---|
| 760 | /* ã«ã¼ã¿ããããåæåããã*/
|
---|
| 761 | pr->routermap = 0;
|
---|
| 762 |
|
---|
| 763 | /* ã«ã¼ã¿ã追å ããã*/
|
---|
| 764 | pfxrtr_add(pr - nd6_prefix, rtr_index);
|
---|
| 765 |
|
---|
| 766 | return pr;
|
---|
| 767 | }
|
---|
| 768 |
|
---|
| 769 | /*
|
---|
| 770 | * prelist_update -- ãã¬ãã£ãã¯ã¹ã»ãªã¹ããæ´æ°ããã
|
---|
| 771 | */
|
---|
| 772 |
|
---|
| 773 | static void
|
---|
| 774 | prelist_update (T_ND_OPT_PREFIX_INFO *pi, uint_t router_index)
|
---|
| 775 | {
|
---|
| 776 | T_IFNET *ifp = IF_GET_IFNET();
|
---|
| 777 | T_ND6_PREFIX *pr;
|
---|
| 778 | T_IN6_IFADDR *ia = NULL;
|
---|
| 779 | int_t ix, ifidlen;
|
---|
| 780 |
|
---|
| 781 | syscall(wai_sem(SEM_ND6_DEFRTRLIST));
|
---|
| 782 | if ((pr = nd6_prefix_lookup(&pi->prefix, pi->prefix_len)) != NULL) {
|
---|
| 783 | /*
|
---|
| 784 | * ç»é²æ¸ã¿ã®å ´åã¯ããã¬ãã£ãã¯ã¹ãªã¹ããæ´æ°ããã
|
---|
| 785 | */
|
---|
| 786 |
|
---|
| 787 | /*
|
---|
| 788 | * ãã©ã°ã®æ´æ°ã®æ³¨æ:
|
---|
| 789 | * on-link ããã㨠autonomous ãããã¯
|
---|
| 790 | * 1 ãã 0 ã«å¤æ´ãã¦ã¯ãªããªãã
|
---|
| 791 | */
|
---|
| 792 |
|
---|
| 793 | if ((pi->flags & ND_OPT_PI_FLAG_ONLINK) != 0)
|
---|
| 794 | pr->flags |= ND6_PREFIX_FLAG_ONLINK;
|
---|
| 795 | if ((pi->flags & ND_OPT_PI_FLAG_AUTO) != 0)
|
---|
| 796 | pr->flags |= ND6_PREFIX_FLAG_AUTO;
|
---|
| 797 |
|
---|
| 798 | if ((pi->flags & ND_OPT_PI_FLAG_ONLINK) != 0) {
|
---|
| 799 | /*
|
---|
| 800 | * éç¥ããããã¬ãã£ãã¯ã¹ããªã³ãªã³ã¯ã®æã¯ã
|
---|
| 801 | * æå¹æéãæ´æ°ããã
|
---|
| 802 | */
|
---|
| 803 | pr->vltime = ntohl(pi->valid);
|
---|
| 804 | pr->pltime = ntohl(pi->preferred);
|
---|
| 805 | in6_init_prefix_ltimes(pr);
|
---|
| 806 | }
|
---|
| 807 |
|
---|
| 808 | if ((pi->flags & ND_OPT_PI_FLAG_ONLINK ) != 0 &&
|
---|
| 809 | (pr->flags & ND6_PREFIX_STATE_ONLINK) == 0) {
|
---|
| 810 | /*
|
---|
| 811 | * ãªããªã³ã¯ã®ãã¬ãã£ãã¯ã¹ããªã³ãªã³ã¯ã«ãªã£ãæã®å¦çãå®è¡ããã
|
---|
| 812 | */
|
---|
| 813 | if (nd6_prefix_onlink(pr) != E_OK) {
|
---|
| 814 | syscall(sig_sem(SEM_ND6_DEFRTRLIST));
|
---|
| 815 | syslog(LOG_ERROR, "[ND6 RTR] prefix update failed.");
|
---|
| 816 | return;
|
---|
| 817 | }
|
---|
| 818 | }
|
---|
| 819 |
|
---|
| 820 | if (router_index != IN6_RTR_IX_UNREACH && pfxrtr_lookup(pr, router_index) == IN6_RTR_IX_UNREACH)
|
---|
| 821 | pfxrtr_add(pr - nd6_prefix, router_index);
|
---|
| 822 | }
|
---|
| 823 | else { /* æªç»é²ã®å ´å */
|
---|
| 824 |
|
---|
| 825 | /* æå¹æé 0 ã®ãã¬ãã£ãã¯ã¹ã¯è¿½å ããªãã*/
|
---|
| 826 | if (pi->valid == 0) {
|
---|
| 827 | syscall(sig_sem(SEM_ND6_DEFRTRLIST));
|
---|
| 828 | return;
|
---|
| 829 | }
|
---|
| 830 |
|
---|
| 831 | /* ãªããªã³ã¯ã§ã¢ãã¬ã¹èªåè¨å®ã«ä½¿ç¨ããªããã°è¿½å ããªãã*/
|
---|
| 832 | if ((pi->flags & (ND_OPT_PI_FLAG_ONLINK | ND_OPT_PI_FLAG_AUTO)) !=
|
---|
| 833 | (ND_OPT_PI_FLAG_ONLINK | ND_OPT_PI_FLAG_AUTO)) {
|
---|
| 834 | syscall(sig_sem(SEM_ND6_DEFRTRLIST));
|
---|
| 835 | return;
|
---|
| 836 | }
|
---|
| 837 |
|
---|
| 838 | /* ãã¬ãã£ãã¯ã¹ã追å ããã*/
|
---|
| 839 | if ((pr = nd6_prelist_add(pi, router_index)) == NULL) {
|
---|
| 840 | syslog(LOG_ERROR, "[ND6 RTR] prefix add failed.");
|
---|
| 841 | syscall(sig_sem(SEM_ND6_DEFRTRLIST));
|
---|
| 842 | return;
|
---|
| 843 | }
|
---|
| 844 |
|
---|
| 845 | if ((pr->flags & ND6_PREFIX_FLAG_ONLINK) == 0) {
|
---|
| 846 | /*
|
---|
| 847 | * ãªããªã³ã¯ã»ãã¬ãã£ãã¯ã¹ã®å ´åã¯ãæå¹æéã 0 ã«è¨å®ããã
|
---|
| 848 | * ãã¨ã§æå¹æéåãã¨ãªãããªã¹ãããåé¤ãããã
|
---|
| 849 | */
|
---|
| 850 | pr->vltime = 0;
|
---|
| 851 | pr->pltime = 0;
|
---|
| 852 | in6_init_prefix_ltimes(pr);
|
---|
| 853 | }
|
---|
| 854 | }
|
---|
| 855 |
|
---|
| 856 | /*
|
---|
| 857 | * ã¹ãã¼ãã¬ã¹ã»ã¢ãã¬ã¹èªåè¨å®ãè¡ãã
|
---|
| 858 | */
|
---|
| 859 | if ((pr->flags & ND6_PREFIX_FLAG_AUTO) == 0) {
|
---|
| 860 | syscall(sig_sem(SEM_ND6_DEFRTRLIST));
|
---|
| 861 | return;
|
---|
| 862 | }
|
---|
| 863 |
|
---|
| 864 | /*
|
---|
| 865 | * éç¥ããããã¬ãã£ãã¯ã¹ãå²ãå½ã¦ããã¦ããã¤ã³ã¿ãã§ã¼ã¹ã®
|
---|
| 866 | * ã¢ãã¬ã¹æ
|
---|
| 867 | å ±ãæ¢ãã
|
---|
| 868 | */
|
---|
| 869 | for (ix = NUM_IN6_IFADDR_ENTRY; ix --; ) {
|
---|
| 870 | ia = &ifp->in_ifaddrs[ix];
|
---|
| 871 | if ((ia->flags & IN6_IFF_DEFINED) != 0 &&
|
---|
| 872 | ia->prefix_len == pr->prefix_len &&
|
---|
| 873 | in6_are_prefix_equal(&ia->addr, &pr->prefix, pr->prefix_len))
|
---|
| 874 | break;
|
---|
| 875 | }
|
---|
| 876 |
|
---|
| 877 | if (ix >= 0) { /* ç»é²æ¸ã¿ã®ã¨ã */
|
---|
| 878 | if ((ia->flags & IN6_IFF_AUTOCONF) == 0) {
|
---|
| 879 | /*
|
---|
| 880 | * ã¹ãã¼ãã¬ã¹ã»ã¢ãã¬ã¹èªåè¨å®ã«ãã
|
---|
| 881 | * è¨å®ããã¦ããªããã°æ´æ°ããªãã
|
---|
| 882 | */
|
---|
| 883 | ;
|
---|
| 884 | }
|
---|
| 885 | else if (ia->flags & IN6_IFF_TENTATIVE) {
|
---|
| 886 | /*
|
---|
| 887 | * éè¤æ¤åºä¸ãªãæ´æ°ããªãã
|
---|
| 888 | */
|
---|
| 889 | ;
|
---|
| 890 | }
|
---|
| 891 | else {
|
---|
| 892 | T_IN6_ADDR mask, addr;
|
---|
| 893 | T_IN6_IFADDR *lla;
|
---|
| 894 | uint32_t vltime;
|
---|
| 895 | SYSTIM now;
|
---|
| 896 | int_t ix;
|
---|
| 897 |
|
---|
| 898 | /* æå¹æéãè¨å®ããã*/
|
---|
| 899 | syscall(get_tim(&now));
|
---|
| 900 |
|
---|
| 901 | if (ia->lifetime.vltime == ND6_INFINITE_LIFETIME)
|
---|
| 902 | vltime = ND6_INFINITE_LIFETIME;
|
---|
| 903 | else if (IFA6_IS_INVALID(ia, now))
|
---|
| 904 | vltime = 0;
|
---|
| 905 | else
|
---|
| 906 | vltime = ia->lifetime.expire - now / SYSTIM_HZ;
|
---|
| 907 |
|
---|
| 908 | if (pr->vltime > (2 * 60 * 60) || pr->vltime > vltime) {
|
---|
| 909 | /*
|
---|
| 910 | * lifetime.expireãpi->valid (æå¹æé) ã¨
|
---|
| 911 | * pi->preferred (æ¨å¥¨æå¹æé) ã®åä½ã¯ [s]ã
|
---|
| 912 | * éç¥ãããæå¹æéã 2 æé以ä¸ããç¾å¨ã®æ®ãæéãã
|
---|
| 913 | * é·ããã°ãæ°ããæå¹æéã«ã¯ãéç¥ãããæå¹æéãè¨å®ããã
|
---|
| 914 | */
|
---|
| 915 | vltime = pr->vltime;
|
---|
| 916 | }
|
---|
| 917 | else if (vltime <= (2 * 60 * 60))
|
---|
| 918 | ;
|
---|
| 919 | else {
|
---|
| 920 | /*
|
---|
| 921 | * IPsec ã¯æªå®è£
|
---|
| 922 | ã®ããã2 æéãè¨å®ããã
|
---|
| 923 | */
|
---|
| 924 | vltime = 2 * 60 * 60;
|
---|
| 925 | }
|
---|
| 926 |
|
---|
| 927 | lla = &ifp->in_ifaddrs[IPV6_IFADDR_IX_LINKLOCAL];
|
---|
| 928 |
|
---|
| 929 | /* ãã¬ãã£ãã¯ã¹ãã¹ã¯ãçæããã*/
|
---|
| 930 | in6_plen2pmask(&mask, pr->prefix_len);
|
---|
| 931 |
|
---|
| 932 | /* ã¢ãã¬ã¹ãçæããã*/
|
---|
| 933 | for (ix = 0; ix < 4; ix ++)
|
---|
| 934 | addr.s6_addr32[ix] = (pr->prefix.s6_addr32[ix] & mask.s6_addr32[ix])
|
---|
| 935 | | ( lla->addr.s6_addr32[ix] & ~mask.s6_addr32[ix]);
|
---|
| 936 |
|
---|
| 937 | in6_update_ifa(ifp, ia, &addr, pr->prefix_len, vltime,
|
---|
| 938 | pr->pltime, router_index, pr - nd6_prefix,
|
---|
| 939 | IN6_IFF_AUTOCONF | IN6_IFF_NODAD);
|
---|
| 940 | }
|
---|
| 941 | }
|
---|
| 942 |
|
---|
| 943 | else { /* æªç»é²ã®ã¨ã */
|
---|
| 944 |
|
---|
| 945 | /*
|
---|
| 946 | * ãã¬ãã£ãã¯ã¹é·ããã§ãã¯ããã
|
---|
| 947 | * ããããã¬ãã£ãã¯ã¹é·ã¨ã¤ã³ã¿ãã§ã¼ã¹ ID ã®åè¨ã
|
---|
| 948 | * 128 ãããã«ä¸è´ããªãæã¯ããã¬ãã£ãã¯ã¹æ
|
---|
| 949 | å ±ãç¡è¦ããã
|
---|
| 950 | */
|
---|
| 951 | if ((ifidlen = in6_if2idlen(ifp)) < 0)
|
---|
| 952 | syslog(LOG_ERROR, "[ND6 RTR] IFID undefined.");
|
---|
| 953 | else if (ifidlen + pr->prefix_len != 128)
|
---|
| 954 | syslog(LOG_NOTICE, "[ND6 RTR] invalid prefix len: %d.", pr->prefix_len);
|
---|
| 955 | else {
|
---|
| 956 |
|
---|
| 957 | for (ix = NUM_IN6_IFADDR_ENTRY; ix --; ) {
|
---|
| 958 | ia = &ifp->in_ifaddrs[ix];
|
---|
| 959 | if ((ia->flags & IN6_IFF_DEFINED) == 0) {
|
---|
| 960 | in6_ifadd(pr, ia, router_index);
|
---|
| 961 | pfxlist_onlink_check();
|
---|
| 962 | break;
|
---|
| 963 | }
|
---|
| 964 | }
|
---|
| 965 |
|
---|
| 966 | if (ix < 0)
|
---|
| 967 | syslog(LOG_ERROR, "[ND6 RTR] prefix update failed.");
|
---|
| 968 | }
|
---|
| 969 | }
|
---|
| 970 | syscall(sig_sem(SEM_ND6_DEFRTRLIST));
|
---|
| 971 | }
|
---|
| 972 |
|
---|
| 973 | /*
|
---|
| 974 | * nd6_prelist_timer -- ãã¬ãã£ãã¯ã¹ã»ãªã¹ãã®ç®¡çã¿ã¤ãã¼
|
---|
| 975 | */
|
---|
| 976 |
|
---|
| 977 | void
|
---|
| 978 | nd6_prelist_timer (void)
|
---|
| 979 | {
|
---|
| 980 | T_ND6_PREFIX *pr;
|
---|
| 981 | SYSTIM now;
|
---|
| 982 | int_t ix;
|
---|
| 983 |
|
---|
| 984 | syscall(get_tim(&now));
|
---|
| 985 | now /= SYSTIM_HZ; /* æå¹æéã®åä½ã¯ [s] */
|
---|
| 986 |
|
---|
| 987 | syscall(wai_sem(SEM_ND6_DEFRTRLIST));
|
---|
| 988 | for (ix = NUM_ND6_PREFIX_ENTRY; ix -- > 0; ) {
|
---|
| 989 | pr = &nd6_prefix[ix];
|
---|
| 990 | if ((pr->flags & ND6_PREFIX_STATE_BUSY) != 0 && (int32_t)(pr->expire - now) <= 0)
|
---|
| 991 | /* pr->expire <= now */
|
---|
| 992 | prelist_remove(pr);
|
---|
| 993 | }
|
---|
| 994 | syscall(sig_sem(SEM_ND6_DEFRTRLIST));
|
---|
| 995 | }
|
---|
| 996 |
|
---|
| 997 | /*
|
---|
| 998 | * nd6_rs_output -- ã«ã¼ã¿è¦è«ãåºåããã
|
---|
| 999 | */
|
---|
| 1000 |
|
---|
| 1001 | static void
|
---|
| 1002 | nd6_rs_output (void)
|
---|
| 1003 | {
|
---|
| 1004 | T_ROUTER_SOLICIT_HDR *rsh;
|
---|
| 1005 | T_NET_BUF *output;
|
---|
| 1006 | T_IN6_IFADDR *ifa;
|
---|
| 1007 | T_IN6_ADDR *saddr;
|
---|
| 1008 | uint16_t len;
|
---|
| 1009 |
|
---|
| 1010 | NET_COUNT_ICMP6(net_count_nd6[NC_ND6_RS_OUT_PACKETS], 1);
|
---|
| 1011 |
|
---|
| 1012 | /*
|
---|
| 1013 | * éä¿¡å
|
---|
| 1014 | ã¢ãã¬ã¹ã«ã¯ããªã³ã¯ãã¼ã«ã«ã¢ãã¬ã¹ãè¨å®ãããã
|
---|
| 1015 | * ã¾ã è¨å®ããããªããã°ãç¡æå®ãè¨å®ããã
|
---|
| 1016 | */
|
---|
| 1017 | if ((ifa = in6ifa_ifpwithix(IF_GET_IFNET(), IPV6_IFADDR_IX_LINKLOCAL)) != NULL && !IFA6_IS_NOTREADY(ifa))
|
---|
| 1018 | saddr = &ifa->addr;
|
---|
| 1019 | else
|
---|
| 1020 | saddr = &in6_addr_unspecified;
|
---|
| 1021 |
|
---|
| 1022 | len = (ROUTER_SOLICIT_HDR_SIZE + 7) >> 3 << 3;
|
---|
| 1023 |
|
---|
| 1024 | /* ãããã¯ã¼ã¯ãããã¡ãç²å¾ããIPv6 ããããè¨å®ããã*/
|
---|
| 1025 | if (in6_get_datagram(&output, len, 0, &in6_addr_linklocal_allrouters,
|
---|
| 1026 | saddr, IPPROTO_ICMPV6,
|
---|
| 1027 | IPV6_MAXHLIM, NBA_SEARCH_ASCENT, TMO_ND6_RS_OUTPUT) != E_OK)
|
---|
| 1028 | return;
|
---|
| 1029 |
|
---|
| 1030 | /* ã«ã¼ã¿è¦è«ããããè¨å®ããã*/
|
---|
| 1031 | rsh = GET_ROUTER_SOLICIT_HDR(output, IF_IP6_ROUTER_SOLICIT_HDR_OFFSET);
|
---|
| 1032 | rsh->hdr.type = ND_ROUTER_SOLICIT;
|
---|
| 1033 | rsh->hdr.code = 0;
|
---|
| 1034 | rsh->nd_rs_reserved = 0;
|
---|
| 1035 |
|
---|
| 1036 | /* ãã§ãã¯ãµã ãè¨ç®ããã*/
|
---|
| 1037 | rsh->hdr.sum = 0;
|
---|
| 1038 | rsh->hdr.sum = in6_cksum(output, IPPROTO_ICMPV6, (uint8_t*)rsh - output->buf, len);
|
---|
| 1039 |
|
---|
| 1040 | /* éä¿¡ããã*/
|
---|
| 1041 | NET_COUNT_ICMP6(net_count_nd6[NC_ICMP6_OUT_OCTETS],
|
---|
| 1042 | output->len - GET_IF_IP6_HDR_SIZE(output));
|
---|
| 1043 | NET_COUNT_ICMP6(net_count_nd6[NC_ICMP6_OUT_PACKETS], 1);
|
---|
| 1044 | NET_COUNT_MIB(icmp6_ifstat.ipv6IfIcmpOutMsgs, 1);
|
---|
| 1045 | NET_COUNT_MIB(icmp6_ifstat.ipv6IfIcmpOutRouterSolicits, 1);
|
---|
| 1046 | ip6_output(output, IPV6_OUT_SET_HOP_LIMIT(IPV6_OUT_FLG_HOP_LIMIT, IPV6_MAXHLIM), TMO_ND6_RS_OUTPUT);
|
---|
| 1047 | }
|
---|
| 1048 |
|
---|
| 1049 | /*
|
---|
| 1050 | * nd6_defrtrlist_lookup -- ãã£ãã©ã«ãã«ã¼ã¿ã»ãªã¹ããæ¢ç´¢ããã
|
---|
| 1051 | */
|
---|
| 1052 |
|
---|
| 1053 | T_DEF_ROUTER *
|
---|
| 1054 | nd6_defrtrlist_lookup (T_IN6_ADDR *src)
|
---|
| 1055 | {
|
---|
| 1056 | T_DEF_ROUTER *dr = NULL;
|
---|
| 1057 | int_t ix;
|
---|
| 1058 |
|
---|
| 1059 | for (ix = def_router_count; ix -- > 0; ) {
|
---|
| 1060 | dr = &nd6_def_router[ix];
|
---|
| 1061 | if (IN6_ARE_ADDR_EQUAL(&dr->addr, src)) {
|
---|
| 1062 | return dr;
|
---|
| 1063 | }
|
---|
| 1064 | }
|
---|
| 1065 | return NULL;
|
---|
| 1066 | }
|
---|
| 1067 |
|
---|
| 1068 | /*
|
---|
| 1069 | * nd6_router_lookup -- ã«ã¼ã¿ã®ã¢ãã¬ã¹ãè¿ãã
|
---|
| 1070 | *
|
---|
| 1071 | */
|
---|
| 1072 |
|
---|
| 1073 | T_IN6_ADDR *
|
---|
| 1074 | nd6_router_lookup (void)
|
---|
| 1075 | {
|
---|
| 1076 | if (def_router_count > 0)
|
---|
| 1077 | return &nd6_def_router[0].addr;
|
---|
| 1078 | else
|
---|
| 1079 | return NULL;
|
---|
| 1080 | }
|
---|
| 1081 |
|
---|
| 1082 | /*
|
---|
| 1083 | * nd6_defrtrlist_del -- ãã£ãã©ã«ãã«ã¼ã¿ã»ãªã¹ãããã«ã¼ã¿ãåé¤ããã
|
---|
| 1084 | *
|
---|
| 1085 | * 注æ: ãã®é¢æ°ãå¼ã³åºãã¨ãã¯ãSEM_ND6_DEFRTRLIST ã§ã
|
---|
| 1086 | * ããã¯ãã¦ããå¼ã³åºããã¨ã
|
---|
| 1087 | */
|
---|
| 1088 |
|
---|
| 1089 | void
|
---|
| 1090 | nd6_defrtrlist_del (T_DEF_ROUTER *dr)
|
---|
| 1091 | {
|
---|
| 1092 | T_IFNET *ifp = IF_GET_IFNET();
|
---|
| 1093 | T_IN6_IFADDR *ia;
|
---|
| 1094 | T_ND6_PREFIX *pr;
|
---|
| 1095 | uint_t mask;
|
---|
| 1096 | int_t ix, rix, pix, rtrix = dr - nd6_def_router;
|
---|
| 1097 |
|
---|
| 1098 | if ((ia = in6ifa_ifpwithrtrix(ifp, rtrix)) != NULL) {
|
---|
| 1099 | /*
|
---|
| 1100 | * ãããã¯ã¼ã¯ã¤ã³ã¿ãã§ã¼ã¹ã®ãã¬ãã£ãã¯ã¹ãéç¥ãã
|
---|
| 1101 | * ã«ã¼ã¿ãå°éä¸è½ã«ããã
|
---|
| 1102 | */
|
---|
| 1103 | ia->router_index = IN6_RTR_IX_UNREACH;
|
---|
| 1104 | }
|
---|
| 1105 |
|
---|
| 1106 | /* ãã¬ãã£ãã¯ã¹ãªã¹ãããã«ã¼ã¿ãåé¤ããã*/
|
---|
| 1107 | mask = make_mask(rtrix);
|
---|
| 1108 | for (pix = NUM_ND6_PREFIX_ENTRY; pix --; )
|
---|
| 1109 | nd6_prefix[pix].routermap &= ~mask;
|
---|
| 1110 |
|
---|
| 1111 | /* åé¤ããã«ã¼ã¿ä»¥éãåã«è©°ããã*/
|
---|
| 1112 | for (rix = rtrix + 1; rix < def_router_count; rix ++)
|
---|
| 1113 | nd6_def_router[rix - 1] = nd6_def_router[rix];
|
---|
| 1114 |
|
---|
| 1115 | /* ãã¬ãã£ãã¯ã¹ãªã¹ãã®ã«ã¼ã¿ãæ´æ°ããã*/
|
---|
| 1116 | if (dr != nd6_def_router) {
|
---|
| 1117 |
|
---|
| 1118 | /* ãã¹ã¯ãçæããã*/
|
---|
| 1119 | mask = 1;
|
---|
| 1120 | for (ix = rtrix - 1; ix -- > 0; )
|
---|
| 1121 | mask = (mask << 1) | 1;
|
---|
| 1122 |
|
---|
| 1123 | for (pix = NUM_ND6_PREFIX_ENTRY; pix --; ) {
|
---|
| 1124 | pr = &nd6_prefix[pix];
|
---|
| 1125 | pr->routermap = (pr->routermap & mask) | (((pr->routermap & ~mask) >> 1) & ~mask);
|
---|
| 1126 | }
|
---|
| 1127 | }
|
---|
| 1128 | def_router_count --;
|
---|
| 1129 |
|
---|
| 1130 | /* ãã¬ãã£ãã¯ã¹ã®ãªã³ãªã³ã¯ç¶æ
|
---|
| 1131 | ã確èªããã*/
|
---|
| 1132 | pfxlist_onlink_check();
|
---|
| 1133 |
|
---|
| 1134 | /*
|
---|
| 1135 | * åé¤ããã«ã¼ã¿ãåªå
|
---|
| 1136 | ãã£ãã©ã«ãã«ã¼ã¿ã®å ´åã¯ã
|
---|
| 1137 | * åªå
|
---|
| 1138 | ãã£ãã©ã«ãã«ã¼ã¿ãé¸æããªããã
|
---|
| 1139 | */
|
---|
| 1140 | if (rtrix == 0)
|
---|
| 1141 | defrouter_select();
|
---|
| 1142 | }
|
---|
| 1143 |
|
---|
| 1144 | /*
|
---|
| 1145 | * nd6_defrtrlist_timer -- ãã£ãã©ã«ãã«ã¼ã¿ã»ãªã¹ãã®ç®¡çã¿ã¤ãã¼
|
---|
| 1146 | */
|
---|
| 1147 |
|
---|
| 1148 | void
|
---|
| 1149 | nd6_defrtrlist_timer (void)
|
---|
| 1150 | {
|
---|
| 1151 | T_DEF_ROUTER *dr;
|
---|
| 1152 | SYSTIM now;
|
---|
| 1153 | int_t ix;
|
---|
| 1154 |
|
---|
| 1155 | syscall(get_tim(&now));
|
---|
| 1156 |
|
---|
| 1157 | syscall(wai_sem(SEM_ND6_DEFRTRLIST));
|
---|
| 1158 | for (ix = def_router_count; ix -- > 0; ) {
|
---|
| 1159 | dr = &nd6_def_router[ix];
|
---|
| 1160 | if ((int32_t)(dr->expire - now) <= 0) {
|
---|
| 1161 | /* dr->expire <= now */
|
---|
| 1162 | nd6_defrtrlist_del(dr);
|
---|
| 1163 | }
|
---|
| 1164 | }
|
---|
| 1165 | syscall(sig_sem(SEM_ND6_DEFRTRLIST));
|
---|
| 1166 | }
|
---|
| 1167 |
|
---|
| 1168 | /*
|
---|
| 1169 | * nd6_get_drl -- ãã£ãã©ã«ãã«ã¼ã¿ã»ãªã¹ããç²å¾ããã
|
---|
| 1170 | */
|
---|
| 1171 |
|
---|
| 1172 | const T_DEF_ROUTER *
|
---|
| 1173 | nd6_get_drl (uint_t *count)
|
---|
| 1174 | {
|
---|
| 1175 | *count = def_router_count;
|
---|
| 1176 | return nd6_def_router;
|
---|
| 1177 | }
|
---|
| 1178 |
|
---|
| 1179 | /*
|
---|
| 1180 | * nd6_get_prl -- ãã¬ãã£ãã¯ã¹ã»ãªã¹ããç²å¾ããã
|
---|
| 1181 | */
|
---|
| 1182 |
|
---|
| 1183 | const T_ND6_PREFIX *
|
---|
| 1184 | nd6_get_prl (void)
|
---|
| 1185 | {
|
---|
| 1186 | return nd6_prefix;
|
---|
| 1187 | }
|
---|
| 1188 |
|
---|
| 1189 | #endif /* of #if NUM_ND6_DEF_RTR_ENTRY > 0 */
|
---|
| 1190 |
|
---|
| 1191 | /*
|
---|
| 1192 | * nd6_ra_input -- ã«ã¼ã¿éç¥ã®å
|
---|
| 1193 | ¥åå¦çã
|
---|
| 1194 | */
|
---|
| 1195 |
|
---|
| 1196 | void
|
---|
| 1197 | nd6_ra_input (T_NET_BUF *input, uint_t off)
|
---|
| 1198 | {
|
---|
| 1199 | #if NUM_ND6_DEF_RTR_ENTRY > 0
|
---|
| 1200 |
|
---|
| 1201 | T_IFNET *ifp = IF_GET_IFNET();
|
---|
| 1202 | T_IP6_HDR *ip6h;
|
---|
| 1203 | T_ROUTER_ADVERT_HDR *rah;
|
---|
| 1204 | T_ND_OPT_HDR *opth;
|
---|
| 1205 | SYSTIM now;
|
---|
| 1206 | int_t rix;
|
---|
| 1207 | uint_t lladdr_len = 0;
|
---|
| 1208 | uint32_t advrea;
|
---|
| 1209 | uint8_t *lladdr = NULL;
|
---|
| 1210 | uint8_t nd_opt_off[ND_OPT_OFF_ARRAY_SIZE];
|
---|
| 1211 |
|
---|
| 1212 | NET_COUNT_ICMP6(net_count_nd6[NC_ND6_RA_IN_PACKETS], 1);
|
---|
| 1213 |
|
---|
| 1214 | ip6h = GET_IP6_HDR(input);
|
---|
| 1215 |
|
---|
| 1216 | /*
|
---|
| 1217 | * ãããã®ãã§ãã¯ã以ä¸ã®å ´åã¯ç ´æ£ããã
|
---|
| 1218 | * ã»ããããªãããã IPV6_MAXHLIM (255) 以å¤
|
---|
| 1219 | * ã»ãããé·ãçã
|
---|
| 1220 | * ã»å§ç¹ã¢ãã¬ã¹ãããªã³ã¯ãã¼ã«ã«ã§ã¯ãªã (RFC2461)
|
---|
| 1221 | */
|
---|
| 1222 | if (ip6h->hlim != IPV6_MAXHLIM ||
|
---|
| 1223 | input->len - off < ROUTER_ADVERT_HDR_SIZE ||
|
---|
| 1224 | !IN6_IS_ADDR_LINKLOCAL(&ip6h->src))
|
---|
| 1225 | goto err_ret;
|
---|
| 1226 |
|
---|
| 1227 | rah = GET_ROUTER_ADVERT_HDR(input, off);
|
---|
| 1228 |
|
---|
| 1229 | /* è¿é£æ¢ç´¢ãªãã·ã§ã³ã®ãªãã»ãããè¨é²ããã*/
|
---|
| 1230 | if (nd6_options(nd_opt_off, input->buf + (off + ROUTER_ADVERT_HDR_SIZE),
|
---|
| 1231 | input->len - (off + ROUTER_ADVERT_HDR_SIZE)) != E_OK)
|
---|
| 1232 | goto err_ret;
|
---|
| 1233 | /*
|
---|
| 1234 | * å°éå¯è½ç¶æ
|
---|
| 1235 | ã®æå¹æéã®æ´æ°
|
---|
| 1236 |
|
---|
| 1237 | */
|
---|
| 1238 | if (rah->reachable) {
|
---|
| 1239 | advrea = ntohl(rah->reachable) * SYSTIM_HZ / 1000; /* rah->reachable ã®åä½ã¯ ms */
|
---|
| 1240 | if (advrea <= ND6_MAX_REACHABLE_TIME &&
|
---|
| 1241 | advrea != nd6_base_reachable_time) {
|
---|
| 1242 | syscall(get_tim(&now));
|
---|
| 1243 | nd6_recalc_reachtm_interval
|
---|
| 1244 | = now + ND6_RECALC_REACHTM_INTERVAL;
|
---|
| 1245 | nd6_base_reachable_time = advrea;
|
---|
| 1246 | nd6_reachable_time
|
---|
| 1247 | = ND6_CALC_REACH_TIME(nd6_base_reachable_time);
|
---|
| 1248 | }
|
---|
| 1249 | }
|
---|
| 1250 |
|
---|
| 1251 | /* è¿é£æ¢ç´¢ã®éä¿¡ééã®æ´æ° */
|
---|
| 1252 | if (rah->retransmit) {
|
---|
| 1253 | nd6_retrans_time = ntohl(rah->retransmit) * SYSTIM_HZ / 1000;
|
---|
| 1254 | /* rah->retransmit ã®åä½ã¯ ms */
|
---|
| 1255 | }
|
---|
| 1256 |
|
---|
| 1257 | /* ããããªãããã®è¦å®å¤ã®æ´æ° */
|
---|
| 1258 | if (rah->nd_ra_current_hoplimit) {
|
---|
| 1259 | ip6_defhlim = rah->nd_ra_current_hoplimit;
|
---|
| 1260 | }
|
---|
| 1261 |
|
---|
| 1262 | /* ãã£ãã©ã«ãã«ã¼ã¿ãªã¹ãã®æ´æ° */
|
---|
| 1263 | rix = defrtrlist_update(&ip6h->src,
|
---|
| 1264 | ntohs(rah->nd_ra_router_lifetime),
|
---|
| 1265 | rah->nd_ra_flags); /* rah->nd_ra_router_lifetime ã®åä½ã¯ç§ */
|
---|
| 1266 |
|
---|
| 1267 | /* ãã¬ãã£ãã¯ã¹ãªã¹ãã®æ´æ° */
|
---|
| 1268 | if (nd_opt_off[ND_OPT_OFF_ARRAY_IX(ND_OPT_PREFIX_INFO_COUNT)]) {
|
---|
| 1269 | T_ND_OPT_PREFIX_INFO *pi;
|
---|
| 1270 | uint_t pi_off, pi_count;
|
---|
| 1271 |
|
---|
| 1272 | pi_count = nd_opt_off[ND_OPT_OFF_ARRAY_IX(ND_OPT_PREFIX_INFO_COUNT)];
|
---|
| 1273 | pi_off = off + ROUTER_ADVERT_HDR_SIZE
|
---|
| 1274 | + nd_opt_off[ND_OPT_OFF_ARRAY_IX(ND_OPT_PREFIX_INFORMATION)] - 8;
|
---|
| 1275 | /* 注æ: ãªãã·ã§ã³ãªãã»ããé
|
---|
| 1276 | åã«ã¯ããªãã»ãã + 8 ãè¨å®ããã¦ããã*/
|
---|
| 1277 | while (pi_count -- > 0) {
|
---|
| 1278 | pi = (T_ND_OPT_PREFIX_INFO*)(input->buf + pi_off);
|
---|
| 1279 | if (pi->type != ND_OPT_PREFIX_INFORMATION)
|
---|
| 1280 | /* ãªãã·ã§ã³ã¿ã¤ãããã¬ãã£ãã¯ã¹æ
|
---|
| 1281 | å ±ã§ãªããã°ä½ãããªãã*/
|
---|
| 1282 | ;
|
---|
| 1283 | else if (pi->len != 4)
|
---|
| 1284 | /* ãã¬ãã£ãã¯ã¹æ
|
---|
| 1285 | å ±ã®é·ãã 32 (8Ã4) ã§ãªããã°ä¸æ£ */
|
---|
| 1286 | syslog(LOG_NOTICE, "[ND6 RTR] prefix opt len: %d.", pi->len);
|
---|
| 1287 | else if (pi->prefix_len > 128)
|
---|
| 1288 | /* ãã¬ãã£ãã¯ã¹é·ã¯ 128 ãããä»¥ä¸ */
|
---|
| 1289 | syslog(LOG_NOTICE, "[ND6 RTR] prefix len: %d.", pi->prefix_len);
|
---|
| 1290 | else if (IN6_IS_ADDR_MULTICAST(&pi->prefix) ||
|
---|
| 1291 | IN6_IS_ADDR_LINKLOCAL(&pi->prefix))
|
---|
| 1292 | /* ãã«ããã£ã¹ãã¨ãªã³ã¯ãã¼ã«ã«ã¯ä¸æ£ */
|
---|
| 1293 | syslog(LOG_NOTICE, "[ND6 RTR] invalid addr: %s from %s.",
|
---|
| 1294 | ipv62str(NULL, &pi->prefix), ipv62str(NULL, &ip6h->src));
|
---|
| 1295 | #if 0 /* FreeBSD 6.3 ã§åé¤ããã¦ããã*/
|
---|
| 1296 | else if (IN6_IS_ADDR_AGGREGATE_UNICAST(&pi->prefix) &&
|
---|
| 1297 | (pi->prefix_len != 64) )
|
---|
| 1298 | /* éç´å¯è½ã¦ããã£ã¹ãã§ããã¬ãã£ãã¯ã¹é·ã 64 ããã以å¤ã¯ä¸æ£ */
|
---|
| 1299 | syslog(LOG_NOTICE, "[ND6 RTR] invalid prefix len for global: %d.", pi->prefix_len);
|
---|
| 1300 | #endif
|
---|
| 1301 | else if (ntohl(pi->preferred) > ntohl(pi->valid))
|
---|
| 1302 | /* æ¨å¥¨æå¹æéãæå¹æéããé·ããã°ä¸æ£ */
|
---|
| 1303 | syslog(LOG_NOTICE, "[ND6 RTR] preferred(%d) > valid time(%d).", ntohl(pi->preferred), ntohl(pi->valid));
|
---|
| 1304 | else {
|
---|
| 1305 | syslog(LOG_NOTICE, "[ND6 RTR] update prefix: %s from %s.",
|
---|
| 1306 | ipv62str(NULL, &pi->prefix), ipv62str(NULL, &ip6h->src));
|
---|
| 1307 | if (rix >= 0) {
|
---|
| 1308 | /*
|
---|
| 1309 | * defrtrlist_update ã®æ»ãå¤ã¯ãã«ã¼ã¿ã®ã¤ã³ããã¯ã¹ã
|
---|
| 1310 | * ãã ããå¤ã -1 ãªãããã¬ãã£ãã¯ã¹ã»ãªã¹ãã¯æ´æ°ããªãã
|
---|
| 1311 | */
|
---|
| 1312 | prelist_update(pi, rix); /* ãã¬ãã£ãã¯ã¹ã»ãªã¹ããæ´æ°ããã*/
|
---|
| 1313 | }
|
---|
| 1314 | }
|
---|
| 1315 | pi_off += pi->len << 3; /* ãªãã·ã§ã³é·ã®åä½ã¯ 8 ãã¤ã */
|
---|
| 1316 | }
|
---|
| 1317 | }
|
---|
| 1318 |
|
---|
| 1319 | /* MTU ã®æ´æ° */
|
---|
| 1320 | if (nd_opt_off[ND_OPT_OFF_ARRAY_IX(ND_OPT_MTU)]) {
|
---|
| 1321 | T_ND_OPT_MTU_HDR *optmtuh;
|
---|
| 1322 | uint32_t mtu;
|
---|
| 1323 |
|
---|
| 1324 | optmtuh = (T_ND_OPT_MTU_HDR *)((uint8_t *)(input->buf + off + ROUTER_ADVERT_HDR_SIZE) +
|
---|
| 1325 | nd_opt_off[ND_OPT_OFF_ARRAY_IX(ND_OPT_MTU)] - 8);
|
---|
| 1326 |
|
---|
| 1327 | /*
|
---|
| 1328 | * å¤ã®ãã§ãã¯
|
---|
| 1329 | *
|
---|
| 1330 | * ãªãã·ã§ã³é·: 1
|
---|
| 1331 | * äºç´: 0
|
---|
| 1332 | */
|
---|
| 1333 | if (optmtuh->len != 1 || optmtuh->reserved != 0)
|
---|
| 1334 | goto err_ret;
|
---|
| 1335 |
|
---|
| 1336 | /* MTU ã IPv6 MMTUï¼1280 ãªã¯ãããï¼ä»¥ä¸ãªãç¡è¦ããã*/
|
---|
| 1337 | mtu = ntohl(optmtuh->mtu);
|
---|
| 1338 | if (mtu >= IPV6_MMTU) {
|
---|
| 1339 | if (mtu <= (linkmtu > IF_MTU ? linkmtu : IF_MTU))
|
---|
| 1340 | linkmtu = mtu;
|
---|
| 1341 | }
|
---|
| 1342 | }
|
---|
| 1343 |
|
---|
| 1344 | /*
|
---|
| 1345 | * ã«ã¼ã¿ã®å§ç¹ãªã³ã¯ã¢ãã¬ã¹ãè¿é£ãã£ãã·ã¥ã«ç»é²ããã
|
---|
| 1346 | */
|
---|
| 1347 | if (nd_opt_off[ND_OPT_OFF_ARRAY_IX(ND_OPT_SOURCE_LINKADDR)]) {
|
---|
| 1348 | opth = (T_ND_OPT_HDR *)((uint8_t *)(input->buf + off + ROUTER_ADVERT_HDR_SIZE) +
|
---|
| 1349 | nd_opt_off[ND_OPT_OFF_ARRAY_IX(ND_OPT_SOURCE_LINKADDR)] - 8);
|
---|
| 1350 | /* 注æ: ãªãã·ã§ã³ãªãã»ããé
|
---|
| 1351 | åã«ã¯ããªãã»ãã + 8 ãè¨å®ããã¦ããã*/
|
---|
| 1352 | lladdr = (uint8_t *)(opth + 1);
|
---|
| 1353 | lladdr_len = (opth->len << 3);
|
---|
| 1354 | }
|
---|
| 1355 |
|
---|
| 1356 | /*
|
---|
| 1357 | * ãããã¯ã¼ã¯ã¤ã³ã¿ãã§ã¼ã¹ã®ã¢ãã¬ã¹é·ãä¸è´ããªããã°ã¨ã©ã¼
|
---|
| 1358 | */
|
---|
| 1359 | if (lladdr && lladdr_len != ((sizeof(T_IF_ADDR) + sizeof(T_ND_OPT_HDR) + 7) & ~7))
|
---|
| 1360 | goto err_ret;
|
---|
| 1361 |
|
---|
| 1362 | /* è¿é£ãã£ãã·ã¥ã«ç»é²ããã*/
|
---|
| 1363 | nd6_cache_lladdr(ifp, &ip6h->src, (T_IF_ADDR *)lladdr, ND_ROUTER_ADVERT, 0);
|
---|
| 1364 |
|
---|
| 1365 | /*
|
---|
| 1366 | * ã«ã¼ã¿ã®å§ç¹ãªã³ã¯ã¢ãã¬ã¹ãè¿é£ãã£ãã·ã¥ã«ç»é²ããã®ã§ã
|
---|
| 1367 | * ãªã³ãªã³ã¯ç¶æ
|
---|
| 1368 | ãå¤åããå¯è½æ§ããããããããããã§ãã¯ããã
|
---|
| 1369 | */
|
---|
| 1370 | pfxlist_onlink_check();
|
---|
| 1371 |
|
---|
| 1372 | syscall(rel_net_buf(input));
|
---|
| 1373 | return;
|
---|
| 1374 |
|
---|
| 1375 | err_ret:
|
---|
| 1376 | NET_COUNT_ICMP6(net_count_nd6[NC_ICMP6_IN_ERR_PACKETS], 1);
|
---|
| 1377 | syscall(rel_net_buf(input));
|
---|
| 1378 |
|
---|
| 1379 | #else /* of #if NUM_ND6_DEF_RTR_ENTRY > 0 */
|
---|
| 1380 |
|
---|
| 1381 | /*
|
---|
| 1382 | * ã«ã¼ã¿éç¥ãåä¿¡ããªãå ´åã¯ãç ´æ£ãã¦çµäºããã
|
---|
| 1383 | */
|
---|
| 1384 | NET_COUNT_ICMP6(net_count_nd6[NC_ND6_RA_IN_PACKETS], 1);
|
---|
| 1385 | syscall(rel_net_buf(input));
|
---|
| 1386 |
|
---|
| 1387 | #endif /* of #if NUM_ND6_DEF_RTR_ENTRY > 0 */
|
---|
| 1388 | }
|
---|
| 1389 |
|
---|
| 1390 | #if NUM_ND6_RTR_SOL_RETRY > 0
|
---|
| 1391 |
|
---|
| 1392 | /*
|
---|
| 1393 | * nd6_rtrsol_ctl -- ã«ã¼ã¿è¦è«åºåã®å¶å¾¡
|
---|
| 1394 | */
|
---|
| 1395 |
|
---|
| 1396 | void
|
---|
| 1397 | nd6_rtrsol_ctl (void)
|
---|
| 1398 | {
|
---|
| 1399 | T_IN6_IFADDR *ifa;
|
---|
| 1400 | int_t try;
|
---|
| 1401 |
|
---|
| 1402 | /* ãªã³ã¯ãã¼ã«ã«ã¢ãã¬ã¹ã®ã¢ãã¬ã¹æ
|
---|
| 1403 | å ±ãå¾ãã*/
|
---|
| 1404 | if ((ifa = in6ifa_ifpwithix(IF_GET_IFNET(), IPV6_IFADDR_IX_LINKLOCAL)) == NULL)
|
---|
| 1405 | return;
|
---|
| 1406 |
|
---|
| 1407 | /* ãªã³ã¯ãã¼ã«ã«ã¢ãã¬ã¹ã®éè¤æ¤åºçµäºãå¾
|
---|
| 1408 | ã¤ã*/
|
---|
| 1409 | do {
|
---|
| 1410 | /* ãªã³ã¯ãã¼ã«ã«ã¢ãã¬ã¹ã®éè¤æ¤åºçµäºå¾
|
---|
| 1411 | ã¡æéãè¨å®ããã*/
|
---|
| 1412 | syscall(dly_tsk(net_rand() % TMO_ND6_RTR_SOL_DELAY));
|
---|
| 1413 |
|
---|
| 1414 | /* å¾
|
---|
| 1415 | ã£ã¦ããéã«éè¤ãæ¤åºããããçµäºããã*/
|
---|
| 1416 | if (ifa->flags & IN6_IFF_DUPLICATED)
|
---|
| 1417 | return;
|
---|
| 1418 |
|
---|
| 1419 | } while (!((ifa->flags & IN6_IFF_DEFINED) && (ifa->flags & IN6_IFF_TENTATIVE) == 0));
|
---|
| 1420 |
|
---|
| 1421 | for (try = 0; try < NUM_ND6_RTR_SOL_RETRY; try ++) {
|
---|
| 1422 |
|
---|
| 1423 | /* ãã£ãã©ã«ãã«ã¼ã¿ã»ãªã¹ãã«ã¨ã³ããªãããã°çµäº */
|
---|
| 1424 | if (def_router_count > 0)
|
---|
| 1425 | return;
|
---|
| 1426 |
|
---|
| 1427 | /* ã«ã¼ã¿è¦è«ãåºåããã*/
|
---|
| 1428 | nd6_rs_output();
|
---|
| 1429 |
|
---|
| 1430 | /* åºåã® 2 åç®ä»¥éã®é
|
---|
| 1431 | 延æéãè¨å®ããã*/
|
---|
| 1432 | syscall(dly_tsk(TMO_ND6_RTR_SOL_INTERVAL));
|
---|
| 1433 | }
|
---|
| 1434 | }
|
---|
| 1435 |
|
---|
| 1436 | #endif /* of #if NUM_ND6_RTR_SOL_RETRY > 0 */
|
---|
| 1437 |
|
---|
| 1438 | /*
|
---|
| 1439 | * nd6_onlink_prefix_lookup -- ãã¬ãã£ãã¯ã¹ãæ¢ç´¢ããã
|
---|
| 1440 | */
|
---|
| 1441 |
|
---|
| 1442 | T_ND6_PREFIX *
|
---|
| 1443 | nd6_onlink_prefix_lookup (T_IN6_ADDR *dst)
|
---|
| 1444 | {
|
---|
| 1445 | SYSTIM now;
|
---|
| 1446 | T_ND6_PREFIX *pr;
|
---|
| 1447 | int_t ix;
|
---|
| 1448 |
|
---|
| 1449 | syscall(get_tim(&now));
|
---|
| 1450 | now /= SYSTIM_HZ;
|
---|
| 1451 |
|
---|
| 1452 | /* æ¨å¥¨æå¹æéå
|
---|
| 1453 | ã®ãã¬ãã£ãã¯ã¹ãæ¢ç´¢ããã*/
|
---|
| 1454 | for (ix = NUM_ND6_PREFIX_ENTRY; ix -- > 0; ) {
|
---|
| 1455 | pr = &nd6_prefix[ix];
|
---|
| 1456 | if ((pr->flags & ND6_PREFIX_STATE_BUSY) &&
|
---|
| 1457 | (pr->flags & ND6_PREFIX_FLAG_ONLINK) &&
|
---|
| 1458 | in6_are_prefix_equal(dst, &pr->prefix, pr->prefix_len) &&
|
---|
| 1459 | (int32_t)(pr->preferred - now) > 0) {
|
---|
| 1460 | /* pr->preferred > now */
|
---|
| 1461 | return pr;
|
---|
| 1462 | }
|
---|
| 1463 | }
|
---|
| 1464 |
|
---|
| 1465 | /* æå¹æéå
|
---|
| 1466 | ã®ãã¬ãã£ãã¯ã¹ãæ¢ç´¢ããã*/
|
---|
| 1467 | for (ix = NUM_ND6_PREFIX_ENTRY; ix -- > 0; ) {
|
---|
| 1468 | pr = &nd6_prefix[ix];
|
---|
| 1469 | if ((pr->flags & ND6_PREFIX_STATE_BUSY) &&
|
---|
| 1470 | (pr->flags & ND6_PREFIX_FLAG_ONLINK) &&
|
---|
| 1471 | in6_are_prefix_equal(dst, &pr->prefix, pr->prefix_len) &&
|
---|
| 1472 | (int32_t)(pr->expire - now) > 0) {
|
---|
| 1473 | /* pr->expire > now */
|
---|
| 1474 | return pr;
|
---|
| 1475 | }
|
---|
| 1476 | }
|
---|
| 1477 |
|
---|
| 1478 | return NULL;
|
---|
| 1479 | }
|
---|
| 1480 |
|
---|
| 1481 | #endif /* of #ifdef SUPPORT_INET6 */
|
---|