[331] | 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®ããããã®æ¡ä»¶ãæºããã
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| 28 | * ã¨ï¼
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| 29 | * (a) åé
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| 30 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨è
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| 31 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®è
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| 32 | * ä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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| 33 | * (b) åé
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| 34 | å¸ã®å½¢æ
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| 35 | ãï¼å¥ã«å®ããæ¹æ³ã«ãã£ã¦ï¼TOPPERSããã¸ã§ã¯ãã«
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| 36 | * å ±åãããã¨ï¼
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| 37 | * (4) æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´æ¥çã¾ãã¯éæ¥çã«çãããããªãæ
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| 38 | * 害ãããï¼ä¸è¨èä½æ¨©è
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| 39 | ããã³TOPPERSããã¸ã§ã¯ããå
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| 40 | 責ãããã¨ï¼
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| 41 | *
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| 42 | * æ¬ã½ããã¦ã§ã¢ã¯ï¼ç¡ä¿è¨¼ã§æä¾ããã¦ãããã®ã§ããï¼ä¸è¨èä½æ¨©è
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| 43 | ã
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| 44 | * ãã³TOPPERSããã¸ã§ã¯ãã¯ï¼æ¬ã½ããã¦ã§ã¢ã«é¢ãã¦ï¼ãã®é©ç¨å¯è½æ§ã
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| 45 | * å«ãã¦ï¼ãããªãä¿è¨¼ãè¡ããªãï¼ã¾ãï¼æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´
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| 46 | * æ¥çã¾ãã¯éæ¥çã«çãããããªãæ害ã«é¢ãã¦ãï¼ãã®è²¬ä»»ãè² ããªãï¼
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| 47 | *
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| 48 | * @(#) $Id$
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| 49 | */
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| 50 |
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| 51 | /*
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| 52 | * ãã¹ãåââIP ã¢ãã¬ã¹å¤æ
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| 53 | */
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| 54 |
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| 55 | #ifndef RESOLVER_H
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| 56 | #define RESOLVER_H
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| 57 |
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[429] | 58 | #include <netapp/dns.h>
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| 59 |
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[331] | 60 | /*
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| 61 | * ã³ã³ãã¤ã«æã³ã³ãã£ã®ã¥ã¬ã¼ã·ã§ã³ã®æå®
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| 62 | */
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| 63 |
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| 64 | /* ãã¼ãçªå· */
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| 65 |
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| 66 | #define RSLV_CFG_DNS_PORTNO 53
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| 67 |
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| 68 | /*
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| 69 | * ã¿ã¤ã ã¢ã¦ãå¤
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| 70 | */
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| 71 |
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| 72 | #define TMO_DNS_UDP_SND ULONG_C(1*1000*1000) /* [us]ãDNS ãµã¼ãã¸ã® UDP éä¿¡ã¿ã¤ã ã¢ã¦ã */
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| 73 | #define TMO_DNS_UDP_RCV ULONG_C(5*1000*1000) /* [us]ãDNS ãµã¼ãããã® UDP åä¿¡ã¿ã¤ã ã¢ã¦ã */
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| 74 | #define NUM_DNS_UDP_RETRY 1 /* ãªãã©ã¤åæ° */
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| 75 |
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| 76 | /*
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| 77 | * ãã¡ã¤ã³å
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| 78 | */
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| 79 |
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| 80 |
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| 81 | #if !defined(RSLV_CFG_DNS_DOMAIN_NAME_STR)
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| 82 | #define RSLV_CFG_DNS_DOMAIN_NAME_STR ""
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| 83 | #endif
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| 84 |
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| 85 | /*
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| 86 | * DNS ãµã¼ãã¼ã® IPã¢ãã¬ã¹
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| 87 | */
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| 88 |
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| 89 | #if !defined(IPV6_ADDR_DNS_INIT)
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| 90 | #define IPV6_ADDR_DNS_INIT IPV6_ADDR_UNSPECIFIED_INIT
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| 91 | #endif
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| 92 |
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| 93 | #if !defined(IPV4_ADDR_DNS)
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| 94 | #define IPV4_ADDR_DNS IPV4_ADDRANY
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| 95 | #endif
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| 96 |
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| 97 | /*
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| 98 | * éåä¿¡ãããã¡æ°
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| 99 | */
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| 100 |
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| 101 | #define NUM_MPF_RSLV_SRBUF 1
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| 102 |
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| 103 | /*
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| 104 | * ããã°ã©ã ã§ä½¿ç¨ããæ
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| 105 | å ±ã®å®ç¾©
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| 106 | */
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| 107 |
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| 108 | /*
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| 109 | * ããã°ã©ã ã§ä½¿ç¨ãã DNS ããã
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| 110 | *
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| 111 | * 注æ: ã¡ã³ãã¯ãã¹ããã¤ããªã¼ãã¼
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| 112 | *
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| 113 | * 0 7 8 15
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| 114 | * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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| 115 | * | ID |
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| 116 | * +--+-----------+--+--+--+--+--------+-----------+
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| 117 | * |QR| Opcode |AA|TC|RD|RA| Z | RCODE |
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| 118 | * +--+--------+--+--+--+--+--+--------+-----------+
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| 119 | * | QDCOUNT |
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| 120 | * +-----------------------------------------------+
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| 121 | * | ANCOUNT |
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| 122 | * +-----------------------------------------------+
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| 123 | * | NSCOUNT |
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| 124 | * +-----------------------------------------------+
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| 125 | * | ARCOUNT |
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| 126 | * +-----------------------------------------------+
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| 127 | */
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| 128 |
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| 129 | typedef struct rslv_dns_hdr {
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| 130 | uint16_t id; /* ID */
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| 131 | uint16_t code; /* QR: 1
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| 132 | Opcode: 4
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| 133 | AA: 1
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| 134 | TC: 1
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| 135 | RD: 1
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| 136 | RA: 1
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| 137 | Z: 3
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| 138 | RCODE: 4
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| 139 | */
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| 140 | uint16_t qdcount; /* question section */
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| 141 | uint16_t ancount; /* answer section */
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| 142 | uint16_t nscount; /* authority section */
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| 143 | uint16_t arcount; /* additional section */
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| 144 | } __attribute__((packed))T_RSLV_DNS_HDR;
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| 145 |
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| 146 | /*
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| 147 | * DNS message data
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| 148 | *
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| 149 | * 注æ: ã¡ã³ãã¯ãã¹ããã¤ããªã¼ãã¼
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| 150 | */
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| 151 |
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| 152 | typedef struct rslv_dns_msg {
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| 153 | T_RSLV_DNS_HDR dns_hdr; /* DNS heder */
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| 154 | uint_t qd_offset; /* offset of question section */
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| 155 | uint_t an_offset; /* offset of answer section */
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| 156 | uint_t ns_offset; /* offset of authority records section */
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| 157 | uint_t ar_offset; /* offset of additional records section */
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| 158 | } __attribute__((packed))T_RSLV_DNS_MSG;
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| 159 |
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| 160 | /*
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| 161 | * RR (Resouce Record) å½¢å¼
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| 162 | *
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| 163 | * 0 7 8 15
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| 164 | * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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| 165 | * | . |
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| 166 | * +----------------- . -----------------+
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| 167 | * | NAME |
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| 168 | * +----------------- . -----------------+
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| 169 | * | . |
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| 170 | * +-----------------------------------------------+
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| 171 | * | TYPE |
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| 172 | * +-----------------------------------------------+
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| 173 | * | CLASS |
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| 174 | * +-----------------------------------------------+
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| 175 | * | TTL |
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| 176 | * | |
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| 177 | * +-----------------------------------------------+
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| 178 | * | RDLENGTH |
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| 179 | * +-----------------------------------------------+
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| 180 | * | . |
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| 181 | * +----------------- . -----------------+
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| 182 | * | RDATA |
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| 183 | * +----------------- . -----------------+
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| 184 | * | . |
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| 185 | * +-----------------------------------------------+
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| 186 | *
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| 187 | * 注æ: offset ã®åç¹ã¯ DNS message ã®å
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| 188 | é
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| 189 | * ã¡ã³ãã¯ãã¹ããã¤ããªã¼ãã¼
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| 190 | */
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| 191 |
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| 192 | typedef struct rslv_rr {
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| 193 | uint16_t type; /* TYPE */
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| 194 | uint16_t class; /* CLASS */
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| 195 | uint32_t ttl; /* TTL */
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| 196 | uint16_t rdlength; /* RDATA length */
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| 197 | uint_t rdata_offset; /* offset of RDATA */
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| 198 | } __attribute__((packed))T_RSLV_RR;
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| 199 |
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| 200 | /*
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| 201 | * Question section å½¢å¼
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| 202 | *
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| 203 | * 0 7 8 15
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| 204 | * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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| 205 | * | . |
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| 206 | * +----------------- . -----------------+
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| 207 | * | QNAME |
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| 208 | * +----------------- . -----------------+
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| 209 | * | . |
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| 210 | * +-----------------------------------------------+
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| 211 | * | QTYPE |
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| 212 | * +-----------------------------------------------+
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| 213 | * | QCLASS |
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| 214 | * +-----------------------------------------------+
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| 215 | *
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| 216 | * 注æ: ã¡ã³ãã¯ãã¹ããã¤ããªã¼ãã¼
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| 217 | */
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| 218 |
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| 219 | typedef struct rslv_qd {
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| 220 | uint16_t type; /* TYPE */
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| 221 | uint16_t class; /* CLASS */
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| 222 | } __attribute__((packed))T_RSLV_QD;
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| 223 |
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| 224 | /*
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| 225 | * SOA RDATA å½¢å¼
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| 226 | *
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| 227 | * 0 7 8 15
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| 228 | * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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| 229 | * | . |
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| 230 | * +----------------- . -----------------+
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| 231 | * | MNAME |
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| 232 | * +----------------- . -----------------+
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| 233 | * | . |
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| 234 | * +-----------------------------------------------+
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| 235 | * | . |
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| 236 | * +----------------- . -----------------+
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| 237 | * | RNAME |
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| 238 | * +----------------- . -----------------+
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| 239 | * | . |
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| 240 | * +-----------------------------------------------+
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| 241 | * | SERIAL |
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| 242 | * | |
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| 243 | * +-----------------------------------------------+
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| 244 | * | REFRESH |
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| 245 | * | |
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| 246 | * +-----------------------------------------------+
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| 247 | * | RETRY |
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| 248 | * | |
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| 249 | * +-----------------------------------------------+
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| 250 | * | EXPIRE |
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| 251 | * | |
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| 252 | * +-----------------------------------------------+
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| 253 | * | MINIMUM |
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| 254 | * | |
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| 255 | * +-----------------------------------------------+
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| 256 | *
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| 257 | * 注æ: offset ã®åç¹ã¯ DNS message ã®å
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| 258 | é
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| 259 | * ã¡ã³ãã¯ãã¹ããã¤ããªã¼ãã¼
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| 260 | */
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| 261 |
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| 262 | typedef struct rslv_soa {
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| 263 | uint32_t serial; /* SERIAL */
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| 264 | uint32_t refresh; /* REFRESH */
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| 265 | uint32_t retry; /* RETRY */
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| 266 | uint32_t expire; /* EXPIRE */
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| 267 | uint32_t minimum; /* MINIMUM */
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| 268 | } __attribute__((packed))T_RSLV_SOA;
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| 269 |
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| 270 | /*
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| 271 | * dns_lookup_host ã® flags ã®å®ç¾©
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| 272 | *
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| 273 | * 注æ:
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| 274 | * dns.h ã§å®ç¾©ããã¦ãã DNS_OPCODE ã¨éãªããªããã¨ã
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| 275 | * #define DNS_OPCODE_MASK 0x7800U
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| 276 | */
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| 277 |
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| 278 | #define DNS_LUP_FLAGS_NAME_IPV4 0x0004U
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| 279 | #define DNS_LUP_FLAGS_NAME_IPV6 0x0006U
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| 280 | #define DNS_LUP_FLAGS_NAME_HOST 0x0010U
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| 281 | #define DNS_LUP_FLAGS_NAME_FQDN 0x0011U
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| 282 | #define DNS_LUP_FLAGS_NAME_MASK 0x001fU
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| 283 |
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| 284 | #define DNS_LUP_OPCODE_FORWARD DNS_OPCODE_FORWARD
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| 285 | #define DNS_LUP_OPCODE_REVERSE DNS_OPCODE_REVERSE
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| 286 | #define DNS_LUP_OPCODE_STATUS DNS_OPCODE_STATUS
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| 287 | #define DNS_LUP_OPCODE_MASK DNS_OPCODE_MASK
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| 288 |
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| 289 | #define DNS_LUP_FLAGS_PROTO_IPV4 0x0040U
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| 290 | #define DNS_LUP_FLAGS_PROTO_IPV6 0x0080U
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| 291 | #define DNS_LUP_FLAGS_PROTO_MASK 0x00c0U
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| 292 |
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| 293 | #define DNS_LUP_FLAGS_QTYPE_A 0x0100U
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| 294 | #define DNS_LUP_FLAGS_QTYPE_AAAA 0x0200U
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| 295 | #define DNS_LUP_FLAGS_QTYPE_PTR 0x0400U
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| 296 | #define DNS_LUP_FLAGS_QTYPE_MASK 0x0700U
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| 297 |
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| 298 | #define DNS_LUP_FLAGS_MSG 0x0020U
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| 299 |
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| 300 | /*
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| 301 | * ãããã¯ã¼ã¯ã¨ã©ã¼ã³ã¼ã
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| 302 | */
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| 303 |
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| 304 | #define EV_RSLV_ESIZE (-100) /* DNSã¡ãã»ã¼ã¸ã®ååé·ç°å¸¸ */
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| 305 | #define EV_RSLV_UNEXPCT (-101) /* äºæããªãDNSã¡ãã»ã¼ã¸ */
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| 306 |
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| 307 | /*
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| 308 | * é¢æ°
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| 309 | */
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| 310 |
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| 311 | extern ER_UINT dns_lookup_host (uint16_t flags, char *hostname, uint8_t *msg, uint_t msg_len, T_RSLV_DNS_MSG *rslv);
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| 312 | extern ER dns_host_addr (uint16_t flags, char *hostname, T_IN_ADDR *addr);
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| 313 | extern ER_UINT dns_analyze_qd (T_RSLV_QD *qd, uint_t offset, uint8_t *msg, uint_t length);
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| 314 | extern ER_UINT dns_analyze_rr (T_RSLV_RR *rr, uint_t offset, uint8_t *msg, uint_t length);
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| 315 | extern ER_UINT dns_analyze_soa (T_RSLV_SOA *soa, uint_t offset, uint8_t *msg, uint_t length);
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| 316 |
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| 317 | /*
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| 318 | * 注æ: dns_in6_set_dnameãdns_in4_set_dnameã
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| 319 | * dns_in6_set_addrã dns_in4_set_addr ã§ã
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| 320 | * new ã« NULL ãæå®ããã¨ãåæå¤ã«æ»ãã
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| 321 | */
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| 322 |
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| 323 | extern const uint8_t *dns_in6_set_dname (const uint8_t *new, uint_t len);
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| 324 | extern const uint8_t *dns_in6_get_dname (void);
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| 325 | extern const uint8_t *dns_in4_set_dname (const uint8_t *new, uint_t len);
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| 326 | extern const uint8_t *dns_in4_get_dname (void);
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| 327 | extern T_IN6_ADDR *dns_in6_set_addr (T_IN6_ADDR *new);
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| 328 | extern T_IN6_ADDR *dns_in6_get_addr (T_IN6_ADDR *dst);
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| 329 | extern T_IN4_ADDR *dns_in4_set_addr (T_IN4_ADDR *new);
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| 330 | extern T_IN4_ADDR *dns_in4_get_addr (T_IN4_ADDR *dst);
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| 331 |
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| 332 | #endif /* of #ifndef RESOLVER_H */
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