[331] | 1 | /*
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| 2 | * TINET (UDP/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 | * @(#) $Id$
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| 44 | */
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| 45 |
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| 46 | /*
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| 47 | * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
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| 48 | * The Regents of the University of California. All rights reserved.
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| 49 | *
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| 50 | * Redistribution and use in source and binary forms, with or without
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| 51 | * modification, are permitted provided that the following conditions
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| 52 | * are met:
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| 53 | * 1. Redistributions of source code must retain the above copyright
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| 54 | * notice, this list of conditions and the following disclaimer.
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| 55 | * 2. Redistributions in binary form must ceproduce the above copyright
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| 56 | * notice, this list of conditions and the following disclaimer in the
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| 57 | * documentation and/or other materials provided with the distribution.
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| 58 | * 3. All advertising materials mentioning features or use of this software
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| 59 | * must display the following acknowledgement:
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| 60 | * This product includes software developed by the University of
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| 61 | * California, Berkeley and its contributors.
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| 62 | * 4. Neither the name of the University nor the names of its contributors
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| 63 | * may be used to endorse or promote products derived from this software
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| 64 | * without specific prior written permission.
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| 65 | *
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| 66 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 67 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 68 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 69 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 70 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 71 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 72 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 73 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 74 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 75 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 76 | * SUCH DAMAGE.
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| 77 | */
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| 78 |
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| 79 | /*
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| 80 | * udp6_is_dstaddr_accept -- UDP ã®ãã¦å
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| 81 | ã¢ãã¬ã¹ãæ£ããããã§ãã¯ããã
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| 82 | *
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| 83 | * 以ä¸ã®å ´åããã¼ã¿ã°ã©ã ãåä¿¡ããã
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| 84 | *
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| 85 | * ã»ãã¦å
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| 86 | ã¢ãã¬ã¹ããã«ããã£ã¹ã
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| 87 | */
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| 88 |
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| 89 | static bool_t
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| 90 | udp6_is_dstaddr_accept (T_IN6_ADDR *myaddr, T_NET_BUF *input)
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| 91 | {
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| 92 | T_IP6_HDR *ip6h;
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| 93 |
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| 94 | ip6h = GET_IP6_HDR(input);
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| 95 |
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| 96 | if (IN6_IS_ADDR_MULTICAST(&ip6h->dst))
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| 97 | return true;
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| 98 | else
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| 99 | return INN6_IS_DSTADDR_ACCEPT(myaddr, input);
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| 100 | }
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| 101 |
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| 102 | #if defined(_IP4_CFG) && defined(API_CFG_IP4MAPPED_ADDR)
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| 103 |
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| 104 | #ifdef DHCP_CFG
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| 105 |
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| 106 | /*
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| 107 | * udpn_is_dstaddr_accept -- UDP ã®ãã¦å
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| 108 | ã¢ãã¬ã¹ãæ£ããããã§ãã¯ããã
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| 109 | *
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| 110 | * DHCP_CFG ãå®ç¾©ããã¦ããã¨ãã¯ã以ä¸ã®ãã¼ã¿ã°ã©ã ãåä¿¡ããã
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| 111 | *
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| 112 | * ã»ãã¦å
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| 113 | ã¢ãã¬ã¹ãããã¼ããã£ã¹ã
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| 114 | * ã»ãã¼ã«ã«ã¢ãã¬ã¹ãæªå®ç¾©
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| 115 | */
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| 116 |
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| 117 | static bool_t
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| 118 | udpn_is_dstaddr_accept (T_IN6_ADDR *myaddr, T_NET_BUF *input)
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| 119 | {
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| 120 | T_IFNET *ifp = IF_GET_IFNET();
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| 121 |
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| 122 | if (GET_IP_VER(input)==IPV6_VERSION)
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| 123 | return udp6_is_dstaddr_accept(myaddr, input);
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| 124 | else /*if (GET_IP_VER(input)==IPV4_VERSION)*/ {
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| 125 | T_IP4_HDR *ip4h;
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| 126 |
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| 127 | ip4h = GET_IP4_HDR(input);
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| 128 |
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| 129 | if (ifp->in4_ifaddr.addr == IPV4_ADDRANY ||
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| 130 | ntohl(ip4h->dst) == IPV4_ADDR_BROADCAST ||
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| 131 | ntohl(ip4h->dst) == ((ifp->in4_ifaddr.addr & ifp->in4_ifaddr.mask) | ~ifp->in4_ifaddr.mask))
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| 132 | return true;
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| 133 | else
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| 134 | return inn_is_dstaddr_accept(myaddr, input);
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| 135 | }
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| 136 | }
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| 137 |
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| 138 | #else /* of #ifdef DHCP_CFG */
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| 139 |
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| 140 | /*
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| 141 | * udpn_is_dstaddr_accept -- UDP ã®ãã¦å
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| 142 | ã¢ãã¬ã¹ãæ£ããããã§ãã¯ããã
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| 143 | *
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| 144 | * 以ä¸ã®å ´åããã¼ã¿ã°ã©ã ãåä¿¡ããã
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| 145 | *
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| 146 | * ã»ãã¦å
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| 147 | ã¢ãã¬ã¹ãããã¼ããã£ã¹ã
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| 148 | */
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| 149 |
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| 150 | static bool_t
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| 151 | udpn_is_dstaddr_accept (T_IN6_ADDR *myaddr, T_NET_BUF *input)
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| 152 | {
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| 153 | T_IFNET *ifp = IF_GET_IFNET();
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| 154 |
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| 155 | if (GET_IP_VER(input) == IPV6_VERSION)
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| 156 | return udp6_is_dstaddr_accept(myaddr, input);
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| 157 | else /*if (GET_IP_VER(input) == IPV4_VERSION)*/ {
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| 158 | T_IP4_HDR *ip4h;
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| 159 |
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| 160 | ip4h = GET_IP4_HDR(input);
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| 161 |
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| 162 | if (ntohl(ip4h->dst) == IPV4_ADDR_BROADCAST ||
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| 163 | ntohl(ip4h->dst) == ((ifp->in4_ifaddr.addr & ifp->in4_ifaddr.mask) | ~ifp->in4_ifaddr.mask))
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| 164 | return true;
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| 165 | else
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| 166 | return inn_is_dstaddr_accept(myaddr, input);
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| 167 | }
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| 168 | }
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| 169 |
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| 170 | #endif /* of #ifdef DHCP_CFG */
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| 171 |
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| 172 | #endif /* of #if defined(_IP4_CFG) && defined(API_CFG_IP4MAPPED_ADDR) */
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