1 | /*
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2 | * TINET (TCP/IP Protocol Stack)
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3 | *
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4 | * Copyright (C) 2001-2017 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 388 2019-05-22 11:25:18Z 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_endian.h>
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108 | #include <net/net_var.h>
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109 | #include <net/net_buf.h>
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110 | #include <net/net_timer.h>
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111 | #include <net/net_count.h>
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112 |
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113 | #include <netinet/in.h>
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114 | #include <netinet/in_var.h>
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115 | #include <netinet/ip.h>
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116 | #include <netinet/ip_var.h>
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117 | #include <netinet/ip_icmp.h>
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118 |
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119 | #include <netinet6/nd6.h>
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120 | #include <netinet6/in6_ifattach.h>
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121 |
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122 | #include <net/if_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 _IP6_CFG
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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->in6_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->in6_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->in6_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
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352 | * ããã¯ãã¦ããå¼ã³åºããã¨ã
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353 | */
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354 |
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355 | static void
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356 | pfxrtr_add (int_t prefix_index, int_t rtr_index)
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357 | {
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358 | /* ãã¬ãã£ãã¯ã¹ã¨ã³ããªã¨ãã£ãã©ã«ãã«ã¼ã¿ã»ã¨ã³ããªããªã³ã¯ããã*/
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359 | nd6_prefix[prefix_index].routermap |= make_mask(rtr_index);
|
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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 | *
|
---|
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 | {
|
---|
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 | memcpy(&fdr->addr, src, sizeof(T_IN6_ADDR));
|
---|
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->in6_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->in6_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->in6_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->in6_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 |
|
---|
726 | /* ãã¬ãã£ãã¯ã¹ãªã¹ããã空ãã®ãã¬ãã£ãã¯ã¹ã¨ã³ããªãæ¢ç´¢ããã*/
|
---|
727 | for (ix = NUM_ND6_PREFIX_ENTRY; ix --; ) {
|
---|
728 | pr = &nd6_prefix[ix];
|
---|
729 | if ((pr->flags & ND6_PREFIX_STATE_BUSY) == 0)
|
---|
730 | break;
|
---|
731 | }
|
---|
732 |
|
---|
733 | /* ãã¬ãã£ãã¯ã¹ãªã¹ãã«ç©ºãããªããã°ã¨ã©ã¼ */
|
---|
734 | if (ix < 0)
|
---|
735 | return NULL;
|
---|
736 |
|
---|
737 | pr->flags |= ND6_PREFIX_STATE_BUSY;
|
---|
738 |
|
---|
739 | /* ãã¬ãã£ãã¯ã¹ã追å ããã*/
|
---|
740 | pr->prefix = pi->prefix;
|
---|
741 | pr->prefix_len = pi->prefix_len;
|
---|
742 |
|
---|
743 | /* ãã©ã°ãè¨å®ããã*/
|
---|
744 | if ((pi->flags & ND_OPT_PI_FLAG_ONLINK) != 0)
|
---|
745 | pr->flags |= ND6_PREFIX_FLAG_ONLINK;
|
---|
746 | if ((pi->flags & ND_OPT_PI_FLAG_AUTO) != 0)
|
---|
747 | pr->flags |= ND6_PREFIX_FLAG_AUTO;
|
---|
748 |
|
---|
749 | /* ãã¬ãã£ãã¯ã¹ã®æå¹æéãè¨å®ããã*/
|
---|
750 | pr->vltime = ntohl(pi->valid);
|
---|
751 | pr->pltime = ntohl(pi->preferred);
|
---|
752 | in6_init_prefix_ltimes(pr);
|
---|
753 |
|
---|
754 | if ((pr->flags & ND6_PREFIX_FLAG_ONLINK) != 0) {
|
---|
755 | if (nd6_prefix_onlink(pr) != E_OK)
|
---|
756 | return NULL;
|
---|
757 | }
|
---|
758 |
|
---|
759 | /* ã«ã¼ã¿ããããåæåããã*/
|
---|
760 | pr->routermap = 0;
|
---|
761 |
|
---|
762 | /* ã«ã¼ã¿ã追å ããã*/
|
---|
763 | pfxrtr_add(pr - nd6_prefix, rtr_index);
|
---|
764 |
|
---|
765 | return pr;
|
---|
766 | }
|
---|
767 |
|
---|
768 | /*
|
---|
769 | * prelist_update -- ãã¬ãã£ãã¯ã¹ã»ãªã¹ããæ´æ°ããã
|
---|
770 | */
|
---|
771 |
|
---|
772 | static void
|
---|
773 | prelist_update (T_ND_OPT_PREFIX_INFO *pi, uint_t router_index)
|
---|
774 | {
|
---|
775 | T_IFNET *ifp = IF_GET_IFNET();
|
---|
776 | T_ND6_PREFIX *pr;
|
---|
777 | T_IN6_IFADDR *ia = NULL;
|
---|
778 | int_t ix, ifidlen;
|
---|
779 |
|
---|
780 | syscall(wai_sem(SEM_ND6_DEFRTRLIST));
|
---|
781 | if ((pr = nd6_prefix_lookup(&pi->prefix, pi->prefix_len)) != NULL) {
|
---|
782 | /*
|
---|
783 | * ç»é²æ¸ã¿ã®å ´åã¯ããã¬ãã£ãã¯ã¹ãªã¹ããæ´æ°ããã
|
---|
784 | */
|
---|
785 |
|
---|
786 | /*
|
---|
787 | * ãã©ã°ã®æ´æ°ã®æ³¨æ:
|
---|
788 | * on-link ããã㨠autonomous ãããã¯
|
---|
789 | * 1 ãã 0 ã«å¤æ´ãã¦ã¯ãªããªãã
|
---|
790 | */
|
---|
791 |
|
---|
792 | if ((pi->flags & ND_OPT_PI_FLAG_ONLINK) != 0)
|
---|
793 | pr->flags |= ND6_PREFIX_FLAG_ONLINK;
|
---|
794 | if ((pi->flags & ND_OPT_PI_FLAG_AUTO) != 0)
|
---|
795 | pr->flags |= ND6_PREFIX_FLAG_AUTO;
|
---|
796 |
|
---|
797 | if ((pi->flags & ND_OPT_PI_FLAG_ONLINK) != 0) {
|
---|
798 | /*
|
---|
799 | * éç¥ããããã¬ãã£ãã¯ã¹ããªã³ãªã³ã¯ã®æã¯ã
|
---|
800 | * æå¹æéãæ´æ°ããã
|
---|
801 | */
|
---|
802 | pr->vltime = ntohl(pi->valid);
|
---|
803 | pr->pltime = ntohl(pi->preferred);
|
---|
804 | in6_init_prefix_ltimes(pr);
|
---|
805 | }
|
---|
806 |
|
---|
807 | if ((pi->flags & ND_OPT_PI_FLAG_ONLINK ) != 0 &&
|
---|
808 | (pr->flags & ND6_PREFIX_STATE_ONLINK) == 0) {
|
---|
809 | /*
|
---|
810 | * ãªããªã³ã¯ã®ãã¬ãã£ãã¯ã¹ããªã³ãªã³ã¯ã«ãªã£ãæã®å¦çãå®è¡ããã
|
---|
811 | */
|
---|
812 | if (nd6_prefix_onlink(pr) != E_OK) {
|
---|
813 | syscall(sig_sem(SEM_ND6_DEFRTRLIST));
|
---|
814 | syslog(LOG_ERROR, "[ND6 RTR] prefix update failed.");
|
---|
815 | return;
|
---|
816 | }
|
---|
817 | }
|
---|
818 |
|
---|
819 | if (router_index != IN6_RTR_IX_UNREACH && pfxrtr_lookup(pr, router_index) == IN6_RTR_IX_UNREACH)
|
---|
820 | pfxrtr_add(pr - nd6_prefix, router_index);
|
---|
821 | }
|
---|
822 | else { /* æªç»é²ã®å ´å */
|
---|
823 |
|
---|
824 | /* æå¹æé 0 ã®ãã¬ãã£ãã¯ã¹ã¯è¿½å ããªãã*/
|
---|
825 | if (pi->valid == 0) {
|
---|
826 | syscall(sig_sem(SEM_ND6_DEFRTRLIST));
|
---|
827 | return;
|
---|
828 | }
|
---|
829 |
|
---|
830 | /* ãªããªã³ã¯ã§ã¢ãã¬ã¹èªåè¨å®ã«ä½¿ç¨ããªããã°è¿½å ããªãã*/
|
---|
831 | if ((pi->flags & (ND_OPT_PI_FLAG_ONLINK | ND_OPT_PI_FLAG_AUTO)) !=
|
---|
832 | (ND_OPT_PI_FLAG_ONLINK | ND_OPT_PI_FLAG_AUTO)) {
|
---|
833 | syscall(sig_sem(SEM_ND6_DEFRTRLIST));
|
---|
834 | return;
|
---|
835 | }
|
---|
836 |
|
---|
837 | /* ãã¬ãã£ãã¯ã¹ã追å ããã*/
|
---|
838 | if ((pr = nd6_prelist_add(pi, router_index)) == NULL) {
|
---|
839 | syslog(LOG_ERROR, "[ND6 RTR] prefix add failed.");
|
---|
840 | syscall(sig_sem(SEM_ND6_DEFRTRLIST));
|
---|
841 | return;
|
---|
842 | }
|
---|
843 |
|
---|
844 | #if 1 /* ãã¬ãã£ãã¯ã¹ãæªç»é²ã®å ´åã ã表示ããã*/
|
---|
845 | syslog(LOG_NOTICE, "[ND6 RTR] add prefix: flags[MOH]: %02x, addr: %s\n"
|
---|
846 | " from: %s.",
|
---|
847 | nd6_def_router[router_index].flags,
|
---|
848 | ipv62str(NULL, &pi->prefix),
|
---|
849 | ipv62str(NULL, &nd6_def_router[router_index].addr));
|
---|
850 | #endif
|
---|
851 | if ((pr->flags & ND6_PREFIX_FLAG_ONLINK) == 0) {
|
---|
852 | /*
|
---|
853 | * ãªããªã³ã¯ã»ãã¬ãã£ãã¯ã¹ã®å ´åã¯ãæå¹æéã 0 ã«è¨å®ããã
|
---|
854 | * ãã¨ã§æå¹æéåãã¨ãªãããªã¹ãããåé¤ãããã
|
---|
855 | */
|
---|
856 | pr->vltime = 0;
|
---|
857 | pr->pltime = 0;
|
---|
858 | in6_init_prefix_ltimes(pr);
|
---|
859 | }
|
---|
860 | }
|
---|
861 |
|
---|
862 | /*
|
---|
863 | * ã¹ãã¼ãã¬ã¹ã»ã¢ãã¬ã¹èªåè¨å®ãè¡ãã
|
---|
864 | */
|
---|
865 | if ((pr->flags & ND6_PREFIX_FLAG_AUTO) == 0) {
|
---|
866 | syscall(sig_sem(SEM_ND6_DEFRTRLIST));
|
---|
867 | return;
|
---|
868 | }
|
---|
869 |
|
---|
870 | /*
|
---|
871 | * éç¥ããããã¬ãã£ãã¯ã¹ãå²ãå½ã¦ããã¦ããã¤ã³ã¿ãã§ã¼ã¹ã®
|
---|
872 | * ã¢ãã¬ã¹æ
|
---|
873 | å ±ãæ¢ãã
|
---|
874 | */
|
---|
875 | for (ix = NUM_IN6_IFADDR_ENTRY; ix --; ) {
|
---|
876 | ia = &ifp->in6_ifaddrs[ix];
|
---|
877 | if ((ia->flags & IN6_IFF_DEFINED) != 0 &&
|
---|
878 | ia->prefix_len == pr->prefix_len &&
|
---|
879 | in6_are_prefix_equal(&ia->addr, &pr->prefix, pr->prefix_len))
|
---|
880 | break;
|
---|
881 | }
|
---|
882 |
|
---|
883 | if (ix >= 0) { /* ç»é²æ¸ã¿ã®ã¨ã */
|
---|
884 | if ((ia->flags & IN6_IFF_AUTOCONF) == 0) {
|
---|
885 | /*
|
---|
886 | * ã¹ãã¼ãã¬ã¹ã»ã¢ãã¬ã¹èªåè¨å®ã«ãã
|
---|
887 | * è¨å®ããã¦ããªããã°æ´æ°ããªãã
|
---|
888 | */
|
---|
889 | ;
|
---|
890 | }
|
---|
891 | else if (ia->flags & IN6_IFF_TENTATIVE) {
|
---|
892 | /*
|
---|
893 | * éè¤æ¤åºä¸ãªãæ´æ°ããªãã
|
---|
894 | */
|
---|
895 | ;
|
---|
896 | }
|
---|
897 | else {
|
---|
898 | T_IN6_ADDR mask, addr;
|
---|
899 | T_IN6_IFADDR *lla;
|
---|
900 | uint32_t vltime;
|
---|
901 | SYSTIM now;
|
---|
902 | int_t ix;
|
---|
903 |
|
---|
904 | /* æå¹æéãè¨å®ããã*/
|
---|
905 | syscall(get_tim(&now));
|
---|
906 |
|
---|
907 | if (ia->lifetime.vltime == ND6_INFINITE_LIFETIME)
|
---|
908 | vltime = ND6_INFINITE_LIFETIME;
|
---|
909 | else if (IFA6_IS_INVALID(ia, now))
|
---|
910 | vltime = 0;
|
---|
911 | else
|
---|
912 | vltime = ia->lifetime.expire - now / SYSTIM_HZ;
|
---|
913 |
|
---|
914 | if (pr->vltime > (2 * 60 * 60) || pr->vltime > vltime) {
|
---|
915 | /*
|
---|
916 | * lifetime.expireãpi->valid (æå¹æé) ã¨
|
---|
917 | * pi->preferred (æ¨å¥¨æå¹æé) ã®åä½ã¯ [s]ã
|
---|
918 | * éç¥ãããæå¹æéã 2 æé以ä¸ããç¾å¨ã®æ®ãæéãã
|
---|
919 | * é·ããã°ãæ°ããæå¹æéã«ã¯ãéç¥ãããæå¹æéãè¨å®ããã
|
---|
920 | */
|
---|
921 | vltime = pr->vltime;
|
---|
922 | }
|
---|
923 | else if (vltime <= (2 * 60 * 60))
|
---|
924 | ;
|
---|
925 | else {
|
---|
926 | /*
|
---|
927 | * IPsec ã¯æªå®è£
|
---|
928 | ã®ããã2 æéãè¨å®ããã
|
---|
929 | */
|
---|
930 | vltime = 2 * 60 * 60;
|
---|
931 | }
|
---|
932 |
|
---|
933 | lla = &ifp->in6_ifaddrs[IPV6_IFADDR_IX_LINKLOCAL];
|
---|
934 |
|
---|
935 | /* ãã¬ãã£ãã¯ã¹ãã¹ã¯ãçæããã*/
|
---|
936 | in6_plen2pmask(&mask, pr->prefix_len);
|
---|
937 |
|
---|
938 | /* ã¢ãã¬ã¹ãçæããã*/
|
---|
939 | for (ix = 0; ix < 4; ix ++)
|
---|
940 | addr.s6_addr32[ix] = (pr->prefix.s6_addr32[ix] & mask.s6_addr32[ix])
|
---|
941 | | ( lla->addr.s6_addr32[ix] & ~mask.s6_addr32[ix]);
|
---|
942 |
|
---|
943 | in6_update_ifa(ifp, ia, &addr, pr->prefix_len, vltime,
|
---|
944 | pr->pltime, router_index, pr - nd6_prefix,
|
---|
945 | IN6_IFF_AUTOCONF | IN6_IFF_NODAD);
|
---|
946 | }
|
---|
947 | }
|
---|
948 |
|
---|
949 | else { /* æªç»é²ã®ã¨ã */
|
---|
950 |
|
---|
951 | /*
|
---|
952 | * ãã¬ãã£ãã¯ã¹é·ããã§ãã¯ããã
|
---|
953 | * ããããã¬ãã£ãã¯ã¹é·ã¨ã¤ã³ã¿ãã§ã¼ã¹ ID ã®åè¨ã
|
---|
954 | * 128 ãããã«ä¸è´ããªãæã¯ããã¬ãã£ãã¯ã¹æ
|
---|
955 | å ±ãç¡è¦ããã
|
---|
956 | */
|
---|
957 | if ((ifidlen = in6_if2idlen(ifp)) < 0)
|
---|
958 | syslog(LOG_ERROR, "[ND6 RTR] IFID undefined.");
|
---|
959 | else if (ifidlen + pr->prefix_len != 128)
|
---|
960 | syslog(LOG_NOTICE, "[ND6 RTR] invalid prefix len: %d.", pr->prefix_len);
|
---|
961 | else {
|
---|
962 |
|
---|
963 | for (ix = NUM_IN6_IFADDR_ENTRY; ix --; ) {
|
---|
964 | ia = &ifp->in6_ifaddrs[ix];
|
---|
965 | if ((ia->flags & IN6_IFF_DEFINED) == 0) {
|
---|
966 | in6_ifadd(pr, ia, router_index);
|
---|
967 | pfxlist_onlink_check();
|
---|
968 | break;
|
---|
969 | }
|
---|
970 | }
|
---|
971 |
|
---|
972 | if (ix < 0)
|
---|
973 | syslog(LOG_ERROR, "[ND6 RTR] prefix update failed.");
|
---|
974 | }
|
---|
975 | }
|
---|
976 | syscall(sig_sem(SEM_ND6_DEFRTRLIST));
|
---|
977 | }
|
---|
978 |
|
---|
979 | /*
|
---|
980 | * nd6_prelist_timer -- ãã¬ãã£ãã¯ã¹ã»ãªã¹ãã®ç®¡çã¿ã¤ãã¼
|
---|
981 | */
|
---|
982 |
|
---|
983 | void
|
---|
984 | nd6_prelist_timer (void)
|
---|
985 | {
|
---|
986 | T_ND6_PREFIX *pr;
|
---|
987 | SYSTIM now;
|
---|
988 | int_t ix;
|
---|
989 |
|
---|
990 | syscall(get_tim(&now));
|
---|
991 | now /= SYSTIM_HZ; /* æå¹æéã®åä½ã¯ [s] */
|
---|
992 |
|
---|
993 | syscall(wai_sem(SEM_ND6_DEFRTRLIST));
|
---|
994 | for (ix = NUM_ND6_PREFIX_ENTRY; ix -- > 0; ) {
|
---|
995 | pr = &nd6_prefix[ix];
|
---|
996 | if ((pr->flags & ND6_PREFIX_STATE_BUSY) != 0 && (int32_t)(pr->expire - now) <= 0)
|
---|
997 | /* pr->expire <= now */
|
---|
998 | prelist_remove(pr);
|
---|
999 | }
|
---|
1000 | syscall(sig_sem(SEM_ND6_DEFRTRLIST));
|
---|
1001 | }
|
---|
1002 |
|
---|
1003 | /*
|
---|
1004 | * nd6_rs_output -- ã«ã¼ã¿è¦è«ãåºåããã
|
---|
1005 | */
|
---|
1006 |
|
---|
1007 | static void
|
---|
1008 | nd6_rs_output (void)
|
---|
1009 | {
|
---|
1010 | T_ROUTER_SOLICIT_HDR *rsh;
|
---|
1011 | T_NET_BUF *output;
|
---|
1012 | T_IN6_IFADDR *ifa;
|
---|
1013 | const T_IN6_ADDR *saddr;
|
---|
1014 | uint16_t len;
|
---|
1015 |
|
---|
1016 | NET_COUNT_ICMP6(net_count_nd6[NC_ND6_RS_OUT_PACKETS], 1);
|
---|
1017 |
|
---|
1018 | /*
|
---|
1019 | * éä¿¡å
|
---|
1020 | ã¢ãã¬ã¹ã«ã¯ããªã³ã¯ãã¼ã«ã«ã¢ãã¬ã¹ãè¨å®ãããã
|
---|
1021 | * ã¾ã è¨å®ããããªããã°ãç¡æå®ãè¨å®ããã
|
---|
1022 | */
|
---|
1023 | if ((ifa = in6ifa_ifpwithix(IF_GET_IFNET(), IPV6_IFADDR_IX_LINKLOCAL)) != NULL && !IFA6_IS_NOTREADY(ifa))
|
---|
1024 | saddr = &ifa->addr;
|
---|
1025 | else
|
---|
1026 | saddr = &in6_addr_unspecified;
|
---|
1027 |
|
---|
1028 | len = (ROUTER_SOLICIT_HDR_SIZE + 7) >> 3 << 3;
|
---|
1029 |
|
---|
1030 | /* ãããã¯ã¼ã¯ãããã¡ãç²å¾ããIPv6 ããããè¨å®ããã*/
|
---|
1031 | if (in6_get_datagram(&output, len, 0, &in6_addr_linklocal_allrouters,
|
---|
1032 | saddr, IPPROTO_ICMPV6,
|
---|
1033 | IPV6_MAXHLIM, NBA_SEARCH_ASCENT, TMO_ND6_RS_OUTPUT) != E_OK)
|
---|
1034 | return;
|
---|
1035 |
|
---|
1036 | /* ã«ã¼ã¿è¦è«ããããè¨å®ããã*/
|
---|
1037 | rsh = GET_ROUTER_SOLICIT_HDR(output, IF_IP6_ROUTER_SOLICIT_HDR_OFFSET);
|
---|
1038 | rsh->hdr.type = ND_ROUTER_SOLICIT;
|
---|
1039 | rsh->hdr.code = 0;
|
---|
1040 | rsh->nd_rs_reserved = 0;
|
---|
1041 |
|
---|
1042 | /* ãã§ãã¯ãµã ãè¨ç®ããã*/
|
---|
1043 | rsh->hdr.sum = 0;
|
---|
1044 | rsh->hdr.sum = in6_cksum(output, IPPROTO_ICMPV6, (uint8_t*)rsh - output->buf, len);
|
---|
1045 |
|
---|
1046 | /* éä¿¡ããã*/
|
---|
1047 | NET_COUNT_ICMP6(net_count_nd6[NC_ICMP6_OUT_OCTETS],
|
---|
1048 | output->len - GET_IF_IP6_HDR_SIZE(output));
|
---|
1049 | NET_COUNT_ICMP6(net_count_nd6[NC_ICMP6_OUT_PACKETS], 1);
|
---|
1050 | NET_COUNT_MIB(icmp6_ifstat.ipv6IfIcmpOutMsgs, 1);
|
---|
1051 | NET_COUNT_MIB(icmp6_ifstat.ipv6IfIcmpOutRouterSolicits, 1);
|
---|
1052 | ip6_output(output, IPV6_OUT_SET_HOP_LIMIT(IPV6_OUT_FLG_HOP_LIMIT, IPV6_MAXHLIM), TMO_ND6_RS_OUTPUT);
|
---|
1053 | }
|
---|
1054 |
|
---|
1055 | /*
|
---|
1056 | * nd6_defrtrlist_lookup -- ãã£ãã©ã«ãã«ã¼ã¿ã»ãªã¹ããæ¢ç´¢ããã
|
---|
1057 | */
|
---|
1058 |
|
---|
1059 | T_DEF_ROUTER *
|
---|
1060 | nd6_defrtrlist_lookup (const T_IN6_ADDR *src)
|
---|
1061 | {
|
---|
1062 | T_DEF_ROUTER *dr = NULL;
|
---|
1063 | int_t ix;
|
---|
1064 |
|
---|
1065 | for (ix = def_router_count; ix -- > 0; ) {
|
---|
1066 | dr = &nd6_def_router[ix];
|
---|
1067 | if (IN6_ARE_ADDR_EQUAL(&dr->addr, src)) {
|
---|
1068 | return dr;
|
---|
1069 | }
|
---|
1070 | }
|
---|
1071 | return NULL;
|
---|
1072 | }
|
---|
1073 |
|
---|
1074 | /*
|
---|
1075 | * nd6_router_lookup -- ã«ã¼ã¿ã®ã¢ãã¬ã¹ãè¿ãã
|
---|
1076 | *
|
---|
1077 | */
|
---|
1078 |
|
---|
1079 | const T_IN6_ADDR *
|
---|
1080 | nd6_router_lookup (void)
|
---|
1081 | {
|
---|
1082 | if (def_router_count > 0)
|
---|
1083 | return &nd6_def_router[0].addr;
|
---|
1084 | else
|
---|
1085 | return NULL;
|
---|
1086 | }
|
---|
1087 |
|
---|
1088 | /*
|
---|
1089 | * nd6_defrtrlist_del -- ãã£ãã©ã«ãã«ã¼ã¿ã»ãªã¹ãããã«ã¼ã¿ãåé¤ããã
|
---|
1090 | *
|
---|
1091 | * 注æ: ãã®é¢æ°ãå¼ã³åºãã¨ãã¯ãSEM_ND6_DEFRTRLIST ã§ã
|
---|
1092 | * ããã¯ãã¦ããå¼ã³åºããã¨ã
|
---|
1093 | */
|
---|
1094 |
|
---|
1095 | void
|
---|
1096 | nd6_defrtrlist_del (T_DEF_ROUTER *dr)
|
---|
1097 | {
|
---|
1098 | T_IFNET *ifp = IF_GET_IFNET();
|
---|
1099 | T_IN6_IFADDR *ia;
|
---|
1100 | T_ND6_PREFIX *pr;
|
---|
1101 | uint_t mask;
|
---|
1102 | int_t ix, rix, pix, rtrix = dr - nd6_def_router;
|
---|
1103 |
|
---|
1104 | if ((ia = in6ifa_ifpwithrtrix(ifp, rtrix)) != NULL) {
|
---|
1105 | /*
|
---|
1106 | * ãããã¯ã¼ã¯ã¤ã³ã¿ãã§ã¼ã¹ã®ãã¬ãã£ãã¯ã¹ãéç¥ãã
|
---|
1107 | * ã«ã¼ã¿ãå°éä¸è½ã«ããã
|
---|
1108 | */
|
---|
1109 | ia->router_index = IN6_RTR_IX_UNREACH;
|
---|
1110 | }
|
---|
1111 |
|
---|
1112 | /* ãã¬ãã£ãã¯ã¹ãªã¹ãããã«ã¼ã¿ãåé¤ããã*/
|
---|
1113 | mask = make_mask(rtrix);
|
---|
1114 | for (pix = NUM_ND6_PREFIX_ENTRY; pix --; )
|
---|
1115 | nd6_prefix[pix].routermap &= ~mask;
|
---|
1116 |
|
---|
1117 | /* åé¤ããã«ã¼ã¿ä»¥éãåã«è©°ããã*/
|
---|
1118 | for (rix = rtrix + 1; rix < def_router_count; rix ++)
|
---|
1119 | nd6_def_router[rix - 1] = nd6_def_router[rix];
|
---|
1120 |
|
---|
1121 | /* ãã¬ãã£ãã¯ã¹ãªã¹ãã®ã«ã¼ã¿ãæ´æ°ããã*/
|
---|
1122 | if (dr != nd6_def_router) {
|
---|
1123 |
|
---|
1124 | /* ãã¹ã¯ãçæããã*/
|
---|
1125 | mask = 1;
|
---|
1126 | for (ix = rtrix - 1; ix -- > 0; )
|
---|
1127 | mask = (mask << 1) | 1;
|
---|
1128 |
|
---|
1129 | for (pix = NUM_ND6_PREFIX_ENTRY; pix --; ) {
|
---|
1130 | pr = &nd6_prefix[pix];
|
---|
1131 | pr->routermap = (pr->routermap & mask) | (((pr->routermap & ~mask) >> 1) & ~mask);
|
---|
1132 | }
|
---|
1133 | }
|
---|
1134 | def_router_count --;
|
---|
1135 |
|
---|
1136 | /* ãã¬ãã£ãã¯ã¹ã®ãªã³ãªã³ã¯ç¶æ
|
---|
1137 | ã確èªããã*/
|
---|
1138 | pfxlist_onlink_check();
|
---|
1139 |
|
---|
1140 | /*
|
---|
1141 | * åé¤ããã«ã¼ã¿ãåªå
|
---|
1142 | ãã£ãã©ã«ãã«ã¼ã¿ã®å ´åã¯ã
|
---|
1143 | * åªå
|
---|
1144 | ãã£ãã©ã«ãã«ã¼ã¿ãé¸æããªããã
|
---|
1145 | */
|
---|
1146 | if (rtrix == 0)
|
---|
1147 | defrouter_select();
|
---|
1148 | }
|
---|
1149 |
|
---|
1150 | /*
|
---|
1151 | * nd6_defrtrlist_timer -- ãã£ãã©ã«ãã«ã¼ã¿ã»ãªã¹ãã®ç®¡çã¿ã¤ãã¼
|
---|
1152 | */
|
---|
1153 |
|
---|
1154 | void
|
---|
1155 | nd6_defrtrlist_timer (void)
|
---|
1156 | {
|
---|
1157 | T_DEF_ROUTER *dr;
|
---|
1158 | SYSTIM now;
|
---|
1159 | int_t ix;
|
---|
1160 |
|
---|
1161 | syscall(get_tim(&now));
|
---|
1162 |
|
---|
1163 | syscall(wai_sem(SEM_ND6_DEFRTRLIST));
|
---|
1164 | for (ix = def_router_count; ix -- > 0; ) {
|
---|
1165 | dr = &nd6_def_router[ix];
|
---|
1166 | if ((int32_t)(dr->expire - now) <= 0) {
|
---|
1167 | /* dr->expire <= now */
|
---|
1168 | nd6_defrtrlist_del(dr);
|
---|
1169 | }
|
---|
1170 | }
|
---|
1171 | syscall(sig_sem(SEM_ND6_DEFRTRLIST));
|
---|
1172 | }
|
---|
1173 |
|
---|
1174 | /*
|
---|
1175 | * nd6_get_drl -- ãã£ãã©ã«ãã«ã¼ã¿ã»ãªã¹ããç²å¾ããã
|
---|
1176 | */
|
---|
1177 |
|
---|
1178 | const T_DEF_ROUTER *
|
---|
1179 | nd6_get_drl (uint_t *count)
|
---|
1180 | {
|
---|
1181 | *count = def_router_count;
|
---|
1182 | return nd6_def_router;
|
---|
1183 | }
|
---|
1184 |
|
---|
1185 | /*
|
---|
1186 | * nd6_get_prl -- ãã¬ãã£ãã¯ã¹ã»ãªã¹ããç²å¾ããã
|
---|
1187 | */
|
---|
1188 |
|
---|
1189 | const T_ND6_PREFIX *
|
---|
1190 | nd6_get_prl (void)
|
---|
1191 | {
|
---|
1192 | return nd6_prefix;
|
---|
1193 | }
|
---|
1194 |
|
---|
1195 | #endif /* of #if NUM_ND6_DEF_RTR_ENTRY > 0 */
|
---|
1196 |
|
---|
1197 | /*
|
---|
1198 | * nd6_ra_input -- ã«ã¼ã¿éç¥ã®å
|
---|
1199 | ¥åå¦çã
|
---|
1200 | */
|
---|
1201 |
|
---|
1202 | void
|
---|
1203 | nd6_ra_input (T_NET_BUF *input, uint_t off)
|
---|
1204 | {
|
---|
1205 | #if NUM_ND6_DEF_RTR_ENTRY > 0
|
---|
1206 |
|
---|
1207 | T_IFNET *ifp = IF_GET_IFNET();
|
---|
1208 | T_IP6_HDR *ip6h;
|
---|
1209 | T_ROUTER_ADVERT_HDR *rah;
|
---|
1210 | T_ND_OPT_HDR *opth;
|
---|
1211 | SYSTIM now;
|
---|
1212 | int_t rix;
|
---|
1213 | uint_t lladdr_len = 0;
|
---|
1214 | uint32_t advrea;
|
---|
1215 | uint8_t *lladdr = NULL;
|
---|
1216 | uint8_t nd_opt_off[ND_OPT_OFF_ARRAY_SIZE];
|
---|
1217 |
|
---|
1218 | NET_COUNT_ICMP6(net_count_nd6[NC_ND6_RA_IN_PACKETS], 1);
|
---|
1219 |
|
---|
1220 | ip6h = GET_IP6_HDR(input);
|
---|
1221 |
|
---|
1222 | /*
|
---|
1223 | * ãããã®ãã§ãã¯ã以ä¸ã®å ´åã¯ç ´æ£ããã
|
---|
1224 | * ã»ããããªãããã IPV6_MAXHLIM (255) 以å¤
|
---|
1225 | * ã»ãããé·ãçã
|
---|
1226 | * ã»å§ç¹ã¢ãã¬ã¹ãããªã³ã¯ãã¼ã«ã«ã§ã¯ãªã (RFC2461)
|
---|
1227 | */
|
---|
1228 | if (ip6h->hlim != IPV6_MAXHLIM ||
|
---|
1229 | input->len - off < ROUTER_ADVERT_HDR_SIZE ||
|
---|
1230 | !IN6_IS_ADDR_LINKLOCAL(&ip6h->src))
|
---|
1231 | goto err_ret;
|
---|
1232 |
|
---|
1233 | rah = GET_ROUTER_ADVERT_HDR(input, off);
|
---|
1234 |
|
---|
1235 | /* è¿é£æ¢ç´¢ãªãã·ã§ã³ã®ãªãã»ãããè¨é²ããã*/
|
---|
1236 | if (nd6_options(nd_opt_off, input->buf + (off + ROUTER_ADVERT_HDR_SIZE),
|
---|
1237 | input->len - (off + ROUTER_ADVERT_HDR_SIZE)) != E_OK)
|
---|
1238 | goto err_ret;
|
---|
1239 | /*
|
---|
1240 | * å°éå¯è½ç¶æ
|
---|
1241 | ã®æå¹æéã®æ´æ°
|
---|
1242 |
|
---|
1243 | */
|
---|
1244 | if (rah->reachable) {
|
---|
1245 | advrea = ntohl(rah->reachable) * SYSTIM_HZ / 1000; /* rah->reachable ã®åä½ã¯ ms */
|
---|
1246 | if (advrea <= ND6_MAX_REACHABLE_TIME &&
|
---|
1247 | advrea != nd6_base_reachable_time) {
|
---|
1248 | syscall(get_tim(&now));
|
---|
1249 | nd6_recalc_reachtm_interval
|
---|
1250 | = now + ND6_RECALC_REACHTM_INTERVAL;
|
---|
1251 | nd6_base_reachable_time = advrea;
|
---|
1252 | nd6_reachable_time
|
---|
1253 | = ND6_CALC_REACH_TIME(nd6_base_reachable_time);
|
---|
1254 | }
|
---|
1255 | }
|
---|
1256 |
|
---|
1257 | /* è¿é£æ¢ç´¢ã®éä¿¡ééã®æ´æ° */
|
---|
1258 | if (rah->retransmit) {
|
---|
1259 | nd6_retrans_time = ntohl(rah->retransmit) * SYSTIM_HZ / 1000;
|
---|
1260 | /* rah->retransmit ã®åä½ã¯ ms */
|
---|
1261 | }
|
---|
1262 |
|
---|
1263 | /* ããããªãããã®è¦å®å¤ã®æ´æ° */
|
---|
1264 | if (rah->nd_ra_current_hoplimit) {
|
---|
1265 | ip6_defhlim = rah->nd_ra_current_hoplimit;
|
---|
1266 | }
|
---|
1267 |
|
---|
1268 | /* ãã£ãã©ã«ãã«ã¼ã¿ãªã¹ãã®æ´æ° */
|
---|
1269 | rix = defrtrlist_update(&ip6h->src,
|
---|
1270 | ntohs(rah->nd_ra_router_lifetime),
|
---|
1271 | rah->nd_ra_flags); /* rah->nd_ra_router_lifetime ã®åä½ã¯ç§ */
|
---|
1272 |
|
---|
1273 | /* ãã¬ãã£ãã¯ã¹ãªã¹ãã®æ´æ° */
|
---|
1274 | if (nd_opt_off[ND_OPT_OFF_ARRAY_IX(ND_OPT_PREFIX_INFO_COUNT)]) {
|
---|
1275 | T_ND_OPT_PREFIX_INFO *pi;
|
---|
1276 | uint_t pi_off, pi_count;
|
---|
1277 |
|
---|
1278 | pi_count = nd_opt_off[ND_OPT_OFF_ARRAY_IX(ND_OPT_PREFIX_INFO_COUNT)];
|
---|
1279 | pi_off = off + ROUTER_ADVERT_HDR_SIZE
|
---|
1280 | + nd_opt_off[ND_OPT_OFF_ARRAY_IX(ND_OPT_PREFIX_INFORMATION)] - 8;
|
---|
1281 | /* 注æ: ãªãã·ã§ã³ãªãã»ããé
|
---|
1282 | åã«ã¯ããªãã»ãã + 8 ãè¨å®ããã¦ããã*/
|
---|
1283 | while (pi_count -- > 0) {
|
---|
1284 | pi = (T_ND_OPT_PREFIX_INFO*)(input->buf + pi_off);
|
---|
1285 | if (pi->type != ND_OPT_PREFIX_INFORMATION)
|
---|
1286 | /* ãªãã·ã§ã³ã¿ã¤ãããã¬ãã£ãã¯ã¹æ
|
---|
1287 | å ±ã§ãªããã°ä½ãããªãã*/
|
---|
1288 | ;
|
---|
1289 | else if (pi->len != 4)
|
---|
1290 | /* ãã¬ãã£ãã¯ã¹æ
|
---|
1291 | å ±ã®é·ãã 32 (8Ã4) ã§ãªããã°ä¸æ£ */
|
---|
1292 | syslog(LOG_NOTICE, "[ND6 RTR] prefix opt len: %d.", pi->len);
|
---|
1293 | else if (pi->prefix_len > 128)
|
---|
1294 | /* ãã¬ãã£ãã¯ã¹é·ã¯ 128 ãããä»¥ä¸ */
|
---|
1295 | syslog(LOG_NOTICE, "[ND6 RTR] prefix len: %d.", pi->prefix_len);
|
---|
1296 | else if (IN6_IS_ADDR_MULTICAST(&pi->prefix) ||
|
---|
1297 | IN6_IS_ADDR_LINKLOCAL(&pi->prefix))
|
---|
1298 | /* ãã«ããã£ã¹ãã¨ãªã³ã¯ãã¼ã«ã«ã¯ä¸æ£ */
|
---|
1299 | syslog(LOG_NOTICE, "[ND6 RTR] invalid addr: %s from %s.",
|
---|
1300 | ipv62str(NULL, &pi->prefix), ipv62str(NULL, &ip6h->src));
|
---|
1301 | #if 0 /* FreeBSD 6.3 ã§åé¤ããã¦ããã*/
|
---|
1302 | else if (IN6_IS_ADDR_AGGREGATE_UNICAST(&pi->prefix) &&
|
---|
1303 | (pi->prefix_len != 64) )
|
---|
1304 | /* éç´å¯è½ã¦ããã£ã¹ãã§ããã¬ãã£ãã¯ã¹é·ã 64 ããã以å¤ã¯ä¸æ£ */
|
---|
1305 | syslog(LOG_NOTICE, "[ND6 RTR] invalid prefix len for global: %d.", pi->prefix_len);
|
---|
1306 | #endif
|
---|
1307 | else if (ntohl(pi->preferred) > ntohl(pi->valid))
|
---|
1308 | /* æ¨å¥¨æå¹æéãæå¹æéããé·ããã°ä¸æ£ */
|
---|
1309 | syslog(LOG_NOTICE, "[ND6 RTR] preferred(%d) > valid time(%d).", ntohl(pi->preferred), ntohl(pi->valid));
|
---|
1310 | else {
|
---|
1311 | #if 0 /* ãã¬ãã£ãã¯ã¹ãæªç»é²ã®å ´åã ã表示ããã*/
|
---|
1312 | syslog(LOG_NOTICE, "[ND6 RTR] update prefix: flags[MOH]: %02x, addr: %s\n"
|
---|
1313 | " from: %s.",
|
---|
1314 | rah->nd_ra_flags, ipv62str(NULL, &pi->prefix), ipv62str(NULL, &ip6h->src));
|
---|
1315 | #endif
|
---|
1316 | if (rix >= 0) {
|
---|
1317 | /*
|
---|
1318 | * defrtrlist_update ã®æ»ãå¤ã¯ãã«ã¼ã¿ã®ã¤ã³ããã¯ã¹ã
|
---|
1319 | * ãã ããå¤ã -1 ãªãããã¬ãã£ãã¯ã¹ã»ãªã¹ãã¯æ´æ°ããªãã
|
---|
1320 | */
|
---|
1321 | prelist_update(pi, rix); /* ãã¬ãã£ãã¯ã¹ã»ãªã¹ããæ´æ°ããã*/
|
---|
1322 | }
|
---|
1323 | }
|
---|
1324 | pi_off += pi->len << 3; /* ãªãã·ã§ã³é·ã®åä½ã¯ 8 ãã¤ã */
|
---|
1325 | }
|
---|
1326 | }
|
---|
1327 |
|
---|
1328 | /* MTU ã®æ´æ° */
|
---|
1329 | if (nd_opt_off[ND_OPT_OFF_ARRAY_IX(ND_OPT_MTU)]) {
|
---|
1330 | T_ND_OPT_MTU_HDR *optmtuh;
|
---|
1331 | uint32_t mtu;
|
---|
1332 |
|
---|
1333 | optmtuh = (T_ND_OPT_MTU_HDR *)((uint8_t *)(input->buf + off + ROUTER_ADVERT_HDR_SIZE) +
|
---|
1334 | nd_opt_off[ND_OPT_OFF_ARRAY_IX(ND_OPT_MTU)] - 8);
|
---|
1335 |
|
---|
1336 | /*
|
---|
1337 | * å¤ã®ãã§ãã¯
|
---|
1338 | *
|
---|
1339 | * ãªãã·ã§ã³é·: 1
|
---|
1340 | * äºç´: 0
|
---|
1341 | */
|
---|
1342 | if (optmtuh->len != 1 || optmtuh->reserved != 0)
|
---|
1343 | goto err_ret;
|
---|
1344 |
|
---|
1345 | /* MTU ã IPv6 MMTUï¼1280 ãªã¯ãããï¼ä»¥ä¸ãªãç¡è¦ããã*/
|
---|
1346 | mtu = ntohl(optmtuh->mtu);
|
---|
1347 | if (mtu >= IPV6_MMTU) {
|
---|
1348 | if (mtu <= (linkmtu > IF_MTU ? linkmtu : IF_MTU))
|
---|
1349 | linkmtu = mtu;
|
---|
1350 | }
|
---|
1351 | }
|
---|
1352 |
|
---|
1353 | /*
|
---|
1354 | * ã«ã¼ã¿ã®å§ç¹ãªã³ã¯ã¢ãã¬ã¹ãè¿é£ãã£ãã·ã¥ã«ç»é²ããã
|
---|
1355 | */
|
---|
1356 | if (nd_opt_off[ND_OPT_OFF_ARRAY_IX(ND_OPT_SOURCE_LINKADDR)]) {
|
---|
1357 | opth = (T_ND_OPT_HDR *)((uint8_t *)(input->buf + off + ROUTER_ADVERT_HDR_SIZE) +
|
---|
1358 | nd_opt_off[ND_OPT_OFF_ARRAY_IX(ND_OPT_SOURCE_LINKADDR)] - 8);
|
---|
1359 | /* 注æ: ãªãã·ã§ã³ãªãã»ããé
|
---|
1360 | åã«ã¯ããªãã»ãã + 8 ãè¨å®ããã¦ããã*/
|
---|
1361 | lladdr = (uint8_t *)(opth + 1);
|
---|
1362 | lladdr_len = (opth->len << 3);
|
---|
1363 | }
|
---|
1364 |
|
---|
1365 | /*
|
---|
1366 | * ãããã¯ã¼ã¯ã¤ã³ã¿ãã§ã¼ã¹ã®ã¢ãã¬ã¹é·ãä¸è´ããªããã°ã¨ã©ã¼
|
---|
1367 | */
|
---|
1368 | if (lladdr && lladdr_len != ((sizeof(T_IF_ADDR) + sizeof(T_ND_OPT_HDR) + 7) & ~7))
|
---|
1369 | goto err_ret;
|
---|
1370 |
|
---|
1371 | /* è¿é£ãã£ãã·ã¥ã«ç»é²ããã*/
|
---|
1372 | nd6_cache_lladdr(ifp, &ip6h->src, (T_IF_ADDR *)lladdr, ND_ROUTER_ADVERT, 0);
|
---|
1373 |
|
---|
1374 | /*
|
---|
1375 | * ã«ã¼ã¿ã®å§ç¹ãªã³ã¯ã¢ãã¬ã¹ãè¿é£ãã£ãã·ã¥ã«ç»é²ããã®ã§ã
|
---|
1376 | * ãªã³ãªã³ã¯ç¶æ
|
---|
1377 | ãå¤åããå¯è½æ§ããããããããããã§ãã¯ããã
|
---|
1378 | */
|
---|
1379 | pfxlist_onlink_check();
|
---|
1380 |
|
---|
1381 | syscall(rel_net_buf(input));
|
---|
1382 | return;
|
---|
1383 |
|
---|
1384 | err_ret:
|
---|
1385 | NET_COUNT_ICMP6(net_count_nd6[NC_ICMP6_IN_ERR_PACKETS], 1);
|
---|
1386 | syscall(rel_net_buf(input));
|
---|
1387 |
|
---|
1388 | #else /* of #if NUM_ND6_DEF_RTR_ENTRY > 0 */
|
---|
1389 |
|
---|
1390 | /*
|
---|
1391 | * ã«ã¼ã¿éç¥ãåä¿¡ããªãå ´åã¯ãç ´æ£ãã¦çµäºããã
|
---|
1392 | */
|
---|
1393 | NET_COUNT_ICMP6(net_count_nd6[NC_ND6_RA_IN_PACKETS], 1);
|
---|
1394 | syscall(rel_net_buf(input));
|
---|
1395 |
|
---|
1396 | #endif /* of #if NUM_ND6_DEF_RTR_ENTRY > 0 */
|
---|
1397 | }
|
---|
1398 |
|
---|
1399 | #if NUM_ND6_RTR_SOL_RETRY > 0
|
---|
1400 |
|
---|
1401 | /*
|
---|
1402 | * nd6_rtrsol_ctl -- ã«ã¼ã¿è¦è«åºåã®å¶å¾¡
|
---|
1403 | */
|
---|
1404 |
|
---|
1405 | void
|
---|
1406 | nd6_rtrsol_ctl (void)
|
---|
1407 | {
|
---|
1408 | T_IN6_IFADDR *ifa;
|
---|
1409 | int_t try;
|
---|
1410 |
|
---|
1411 | /* ãªã³ã¯ãã¼ã«ã«ã¢ãã¬ã¹ã®ã¢ãã¬ã¹æ
|
---|
1412 | å ±ãå¾ãã*/
|
---|
1413 | if ((ifa = in6ifa_ifpwithix(IF_GET_IFNET(), IPV6_IFADDR_IX_LINKLOCAL)) == NULL)
|
---|
1414 | return;
|
---|
1415 |
|
---|
1416 | /* ãªã³ã¯ãã¼ã«ã«ã¢ãã¬ã¹ã®éè¤æ¤åºçµäºãå¾
|
---|
1417 | ã¤ã*/
|
---|
1418 | do {
|
---|
1419 | /* ãªã³ã¯ãã¼ã«ã«ã¢ãã¬ã¹ã®éè¤æ¤åºçµäºå¾
|
---|
1420 | ã¡æéãè¨å®ããã*/
|
---|
1421 | syscall(dly_tsk(net_rand() % TMO_ND6_RTR_SOL_DELAY));
|
---|
1422 |
|
---|
1423 | /* å¾
|
---|
1424 | ã£ã¦ããéã«éè¤ãæ¤åºããããçµäºããã*/
|
---|
1425 | if (ifa->flags & IN6_IFF_DUPLICATED)
|
---|
1426 | return;
|
---|
1427 |
|
---|
1428 | } while (!((ifa->flags & IN6_IFF_DEFINED) && (ifa->flags & IN6_IFF_TENTATIVE) == 0));
|
---|
1429 |
|
---|
1430 | for (try = 0; try < NUM_ND6_RTR_SOL_RETRY; try ++) {
|
---|
1431 |
|
---|
1432 | /* ãã£ãã©ã«ãã«ã¼ã¿ã»ãªã¹ãã«ã¨ã³ããªãããã°çµäº */
|
---|
1433 | if (def_router_count > 0)
|
---|
1434 | return;
|
---|
1435 |
|
---|
1436 | /* ã«ã¼ã¿è¦è«ãåºåããã*/
|
---|
1437 | nd6_rs_output();
|
---|
1438 |
|
---|
1439 | /* åºåã® 2 åç®ä»¥éã®é
|
---|
1440 | 延æéãè¨å®ããã*/
|
---|
1441 | syscall(dly_tsk(TMO_ND6_RTR_SOL_INTERVAL));
|
---|
1442 | }
|
---|
1443 | }
|
---|
1444 |
|
---|
1445 | #endif /* of #if NUM_ND6_RTR_SOL_RETRY > 0 */
|
---|
1446 |
|
---|
1447 | /*
|
---|
1448 | * nd6_onlink_prefix_lookup -- ãã¬ãã£ãã¯ã¹ãæ¢ç´¢ããã
|
---|
1449 | */
|
---|
1450 |
|
---|
1451 | T_ND6_PREFIX *
|
---|
1452 | nd6_onlink_prefix_lookup (const T_IN6_ADDR *dst)
|
---|
1453 | {
|
---|
1454 | SYSTIM now;
|
---|
1455 | T_ND6_PREFIX *pr;
|
---|
1456 | int_t ix;
|
---|
1457 |
|
---|
1458 | syscall(get_tim(&now));
|
---|
1459 | now /= SYSTIM_HZ;
|
---|
1460 |
|
---|
1461 | /* æ¨å¥¨æå¹æéå
|
---|
1462 | ã®ãã¬ãã£ãã¯ã¹ãæ¢ç´¢ããã*/
|
---|
1463 | for (ix = NUM_ND6_PREFIX_ENTRY; ix -- > 0; ) {
|
---|
1464 | pr = &nd6_prefix[ix];
|
---|
1465 | if ((pr->flags & ND6_PREFIX_STATE_BUSY) &&
|
---|
1466 | (pr->flags & ND6_PREFIX_FLAG_ONLINK) &&
|
---|
1467 | in6_are_prefix_equal(dst, &pr->prefix, pr->prefix_len) &&
|
---|
1468 | (int32_t)(pr->preferred - now) > 0) {
|
---|
1469 | /* pr->preferred > now */
|
---|
1470 | return pr;
|
---|
1471 | }
|
---|
1472 | }
|
---|
1473 |
|
---|
1474 | /* æå¹æéå
|
---|
1475 | ã®ãã¬ãã£ãã¯ã¹ãæ¢ç´¢ããã*/
|
---|
1476 | for (ix = NUM_ND6_PREFIX_ENTRY; ix -- > 0; ) {
|
---|
1477 | pr = &nd6_prefix[ix];
|
---|
1478 | if ((pr->flags & ND6_PREFIX_STATE_BUSY) &&
|
---|
1479 | (pr->flags & ND6_PREFIX_FLAG_ONLINK) &&
|
---|
1480 | in6_are_prefix_equal(dst, &pr->prefix, pr->prefix_len) &&
|
---|
1481 | (int32_t)(pr->expire - now) > 0) {
|
---|
1482 | /* pr->expire > now */
|
---|
1483 | return pr;
|
---|
1484 | }
|
---|
1485 | }
|
---|
1486 |
|
---|
1487 | return NULL;
|
---|
1488 | }
|
---|
1489 |
|
---|
1490 | #endif /* of #ifdef _IP6_CFG */
|
---|