[317] | 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: ip6_input.c 317 2017-08-03 13:14:26Z coas-nagasima $
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| 44 | */
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| 45 |
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| 46 | /* $FreeBSD: src/sys/netinet6/ip6_input.c,v 1.11.2.10 2001/07/24 19:10:18 brooks Exp $ */
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| 47 | /* $KAME: ip6_input.c,v 1.194 2001/05/27 13:28:35 itojun 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 | /*
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| 79 | * Copyright (c) 1982, 1986, 1988, 1993
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| 80 | * The Regents of the University of California. All rights reserved.
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| 81 | *
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| 82 | * Redistribution and use in source and binary forms, with or without
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| 83 | * modification, are permitted provided that the following conditions
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| 84 | * are met:
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| 85 | * 1. Redistributions of source code must retain the above copyright
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| 86 | * notice, this list of conditions and the following disclaimer.
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| 87 | * 2. Redistributions in binary form must reproduce the above copyright
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| 88 | * notice, this list of conditions and the following disclaimer in the
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| 89 | * documentation and/or other materials provided with the distribution.
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| 90 | * 3. All advertising materials mentioning features or use of this software
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| 91 | * must display the following acknowledgement:
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| 92 | * This product includes software developed by the University of
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| 93 | * California, Berkeley and its contributors.
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| 94 | * 4. Neither the name of the University nor the names of its contributors
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| 95 | * may be used to endorse or promote products derived from this software
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| 96 | * without specific prior written permission.
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| 97 | *
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| 98 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 99 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 100 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 101 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 102 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 103 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 104 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 105 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 106 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 107 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 108 | * SUCH DAMAGE.
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| 109 | *
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| 110 | * @(#)ip_input.c 8.2 (Berkeley) 1/4/94
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| 111 | */
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| 112 |
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| 113 | #include <string.h>
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| 114 |
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| 115 | #ifdef TARGET_KERNEL_ASP
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| 116 |
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| 117 | #include <kernel.h>
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| 118 | #include <sil.h>
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| 119 | #include <t_syslog.h>
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| 120 | #include "tinet_cfg.h"
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| 121 |
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| 122 | #endif /* of #ifdef TARGET_KERNEL_ASP */
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| 123 |
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| 124 | #ifdef TARGET_KERNEL_JSP
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| 125 |
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| 126 | #include <s_services.h>
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| 127 | #include <t_services.h>
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| 128 | #include "tinet_id.h"
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| 129 |
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| 130 | #endif /* of #ifdef TARGET_KERNEL_JSP */
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| 131 |
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| 132 | #include <tinet_defs.h>
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| 133 | #include <tinet_config.h>
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| 134 |
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| 135 | #include <net/if.h>
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| 136 | #include <net/if_loop.h>
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| 137 | #include <net/if_ppp.h>
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| 138 | #include <net/ethernet.h>
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| 139 | #include <net/ppp_ipcp.h>
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| 140 | #include <net/net.h>
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| 141 | #include <net/net_endian.h>
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| 142 | #include <net/net_buf.h>
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| 143 | #include <net/net_count.h>
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| 144 |
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| 145 | #include <netinet/in.h>
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| 146 | #include <netinet/in_var.h>
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| 147 | #include <netinet/ip.h>
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| 148 | #include <netinet/ip_var.h>
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| 149 | #include <netinet/ip_icmp.h>
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| 150 | #include <netinet/tcp.h>
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| 151 | #include <netinet/tcp_var.h>
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| 152 | #include <netinet/udp_var.h>
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| 153 |
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| 154 | #include <netinet6/nd6.h>
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| 155 | #include <netinet6/ah6.h>
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| 156 | #include <netinet6/esp6.h>
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| 157 |
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| 158 | #include <net/if_var.h>
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| 159 |
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| 160 | #ifdef _IP6_CFG
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| 161 |
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| 162 | /*
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| 163 | * é¢æ°
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| 164 | */
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| 165 |
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| 166 | static uint_t ip6_no_header_input (T_NET_BUF **inputp, uint_t *offp, uint_t *nextp);
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| 167 |
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| 168 | /*
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| 169 | * ä¸ä½ãããã³ã«é¸ææ§é ä½
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| 170 | */
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| 171 |
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| 172 | typedef struct t_proto_switch {
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| 173 | uint_t (*func)(T_NET_BUF **, uint_t *, uint_t *); /* å
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| 174 | ¥åé¢æ° */
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| 175 | uint_t proto; /* ãããã³ã«çªå· */
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| 176 | } T_PROTO_SWITCH;
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| 177 |
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| 178 | static const T_PROTO_SWITCH proto_switch[] = {
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| 179 | { esp6_input, IPPROTO_ESP }, /* IPv6 æå·åããã */
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| 180 | { ah6_input, IPPROTO_AH }, /* IPv6 èªè¨¼ããã */
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| 181 | { frag6_input, IPPROTO_FRAGMENT }, /* æçããã */
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| 182 | { route6_input, IPPROTO_ROUTING }, /* çµè·¯å¶å¾¡ããã */
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| 183 | { dest6_input, IPPROTO_DSTOPTS }, /* IPv6 çµç¹ãªãã·ã§ã³ */
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| 184 | { ip6_no_header_input,
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| 185 | IPPROTO_NONE }, /* 次ãããç¡ã */
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| 186 | { icmp6_input, IPPROTO_ICMPV6 },
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| 187 |
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| 188 | #if defined(SUPPORT_TCP)
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| 189 |
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| 190 | { tcp_input, IPPROTO_TCP },
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| 191 |
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| 192 | #endif /* of #if defined(SUPPORT_TCP) */
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| 193 |
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| 194 | #if defined(SUPPORT_UDP) && TNUM_UDP6_CEPID > 0
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| 195 |
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| 196 | { udp6_input, IPPROTO_UDP },
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| 197 |
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| 198 | #endif /* of #if defined(SUPPORT_UDP) && TNUM_UDP6_CEPID > 0 */
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| 199 |
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| 200 | };
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| 201 |
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| 202 | #ifdef SUPPORT_MIB
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| 203 |
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| 204 | T_IN6_IFSTAT in6_ifstat;
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| 205 |
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| 206 | #endif /* of #ifdef SUPPORT_MIB */
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| 207 |
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| 208 | /*
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| 209 | * get_upper_proto -- ä¸ä½ãããã³ã«å¦çé¢æ°ãè¿ãã
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| 210 | */
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| 211 |
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| 212 | static uint_t (*
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| 213 | get_upper_proto(uint_t proto))(T_NET_BUF **, uint_t *, uint_t *)
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| 214 | {
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| 215 | int_t ix;
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| 216 |
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| 217 | for (ix = sizeof(proto_switch) / sizeof(T_PROTO_SWITCH); ix -- > 0; )
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| 218 | if (proto_switch[ix].proto == proto)
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| 219 | return proto_switch[ix].func;
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| 220 | return NULL;
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| 221 | }
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| 222 |
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| 223 | /*
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| 224 | * ip6_no_header_input -- 次ããããç¡ãã®å ´åã®å
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| 225 | ¥åå¦ç
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| 226 | */
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| 227 |
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| 228 | static uint_t
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| 229 | ip6_no_header_input (T_NET_BUF **input, uint_t *offp, uint_t *nextp)
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| 230 | {
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| 231 | syscall(rel_net_buf(*input));
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| 232 | return IPPROTO_DONE;
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| 233 | }
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| 234 |
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| 235 | /*
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| 236 | * ip6_hopopts_input -- ä¸ç¶ç¹ãªãã·ã§ã³å
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| 237 | ¥åå¦ç
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| 238 | *
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| 239 | * æ¬å®è£
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| 240 | ã§ã¯ãããã£ã³ã°ä»¥å¤ã®ãªãã·ã§ã³ãå
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| 241 | ¨ã¦æªç¥ãªãã·ã§ã³ã¨ãã¦å¦çããã
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| 242 | *
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| 243 | * æ»ãå¤:
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| 244 | *
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| 245 | * 0 ä»¥ä¸ æ£å¸¸
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| 246 | * IP6_OPT_RET_ERR (-1) ã¨ã©ã¼ãå¼åºå´ã§ãããã¯ã¼ã¯ãããã¡ãéæ¾ããã
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| 247 | * IP6_OPT_RET_REL (-2) ã¨ã©ã¼ããããã¯ã¼ã¯ãããã¡ã¯éæ¾ããã¦ããã
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| 248 | */
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| 249 |
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| 250 | static ER_UINT
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| 251 | ip6_hopopts_input (T_NET_BUF *input, uint_t *offp, uint_t *nextp)
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| 252 | {
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| 253 | T_IP6_HBH_HDR *hbh;
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| 254 | ER_UINT optlen;
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| 255 | uint_t len;
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| 256 | uint8_t *opt;
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| 257 |
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| 258 | hbh = (T_IP6_HBH_HDR *)(input->buf + *offp);
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| 259 | len = (hbh->len + 1) << 3;
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| 260 | *nextp = *offp - IF_HDR_SIZE + offsetof(T_IP6_HBH_HDR, next);
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| 261 | *offp += len;
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| 262 | opt = (uint8_t *)hbh + sizeof(T_IP6_HBH_HDR);
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| 263 |
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| 264 | for (len -= sizeof(T_IP6_HBH_HDR); len > 0; len -= optlen) {
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| 265 | switch (*opt) {
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| 266 | case IP6OPT_PAD1:
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| 267 | optlen = 1;
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| 268 | break;
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| 269 | case IP6OPT_PADN:
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| 270 | if (len < IP6OPT_MINLEN)
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| 271 | return IP6_OPT_RET_ERR;
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| 272 | optlen = *(opt + 1) + 2;
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| 273 | break;
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| 274 | case IP6OPT_JUMBO:
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| 275 | case IP6OPT_NSAP_ADDR:
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| 276 | case IP6OPT_TUNNEL_LIMIT:
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| 277 | case IP6OPT_RTR_ALERT:
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| 278 | default:
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| 279 | if (len < IP6OPT_MINLEN)
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| 280 | return IP6_OPT_RET_ERR;
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| 281 | optlen = ip6_unknown_opt(input, opt);
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| 282 | if (optlen < 0)
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| 283 | return optlen;
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| 284 | optlen += 2;
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| 285 | break;
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| 286 | }
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| 287 |
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| 288 | opt += optlen;
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| 289 | }
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| 290 |
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| 291 | return *offp;
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| 292 | }
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| 293 |
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| 294 | /*
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| 295 | * ip6_get_prev_hdr -- ç´åã®æ¡å¼µãããã® next ãã£ã¼ã«ãã®ã¢ãã¬ã¹ãè¿ãã
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| 296 | *
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| 297 | * 注æ: off ã«ã¯ IF_HDR_SIZE ãå«ã¾ãã¦ããã
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| 298 | */
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| 299 |
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| 300 | uint8_t *
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| 301 | ip6_get_prev_hdr (T_NET_BUF *nbuf, uint_t off)
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| 302 | {
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| 303 | T_IP6_HDR *ip6h;
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| 304 | T_IP6_EXT_HDR *ip6eh;
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| 305 | uint_t len;
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| 306 | uint8_t next;
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| 307 |
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| 308 | ip6h = GET_IP6_HDR(nbuf);
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| 309 | if (off == IF_HDR_SIZE + sizeof(T_IP6_HDR))
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| 310 | return &ip6h->next;
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| 311 | else {
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| 312 | next = ip6h->next;
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| 313 | len = IF_HDR_SIZE + sizeof(T_IP6_HDR);
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| 314 | ip6eh = NULL;
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| 315 |
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| 316 | while (len < off) {
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| 317 | ip6eh = (T_IP6_EXT_HDR *)(nbuf->buf + len);
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| 318 |
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| 319 | switch (next) {
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| 320 | case IPPROTO_FRAGMENT:
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| 321 | len += sizeof(T_IP6_FRAG_HDR);
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| 322 | break;
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| 323 | case IPPROTO_AH:
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| 324 | len += (ip6eh->len + 2) << 2;
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| 325 | break;
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| 326 | default:
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| 327 | len += (ip6eh->len + 2) << 3;
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| 328 | break;
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| 329 | }
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| 330 | next = ip6eh->next;
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| 331 | }
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| 332 |
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| 333 | if (ip6eh == NULL)
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| 334 | return NULL;
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| 335 | else
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| 336 | return &ip6eh->next;
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| 337 | }
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| 338 | }
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| 339 |
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| 340 | /*
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| 341 | * ip6_init -- IPv6 ã®åæåé¢æ°
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| 342 | */
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| 343 |
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| 344 | void
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| 345 | ip6_init (void)
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| 346 | {
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| 347 | in6_init();
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| 348 | in6_ifainit();
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| 349 | }
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| 350 |
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| 351 | /*
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| 352 | * ip6_input -- IPv6 ã®å
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| 353 | ¥åé¢æ°
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| 354 | */
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| 355 |
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| 356 | void
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| 357 | ip6_input (T_NET_BUF *input)
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| 358 | {
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| 359 | T_IP6_HDR *ip6h;
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| 360 | T_IN6_IFADDR *ia6;
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| 361 | T_IFNET *ifp;
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| 362 | ER_UINT noff;
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| 363 | uint_t next, nest, plen, offp, nextp;
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| 364 | uint_t (*func)(T_NET_BUF **, uint_t *, uint_t *);
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| 365 |
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| 366 | NET_COUNT_IP6(net_count_ip6[NC_IP6_IN_OCTETS], input->len - IF_HDR_SIZE);
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| 367 | NET_COUNT_IP6(net_count_ip6[NC_IP6_IN_PACKETS], 1);
|
---|
| 368 | NET_COUNT_MIB(in6_ifstat.ipv6IfStatsInReceives, 1);
|
---|
| 369 |
|
---|
| 370 | /* IP ãããã®é·ãããã§ãã¯ããã*/
|
---|
| 371 | if (input->len < IF_IP6_HDR_SIZE) {
|
---|
| 372 | NET_COUNT_IP6(net_count_ip6[NC_IP6_IN_ERR_SHORT], 1);
|
---|
| 373 | NET_COUNT_MIB(in6_ifstat.ipv6IfStatsInHdrErrors, 1);
|
---|
| 374 | goto buf_rel;
|
---|
| 375 | }
|
---|
| 376 |
|
---|
| 377 | ip6h = GET_IP6_HDR(input);
|
---|
| 378 |
|
---|
| 379 | /* ãã¼ã¸ã§ã³ããã§ãã¯ããã*/
|
---|
| 380 | if (IP6_VCF_V(ntohl(ip6h->vcf)) != IPV6_VERSION) {
|
---|
| 381 | NET_COUNT_IP6(net_count_ip6[NC_IP6_IN_ERR_VER], 1);
|
---|
| 382 | NET_COUNT_MIB(in6_ifstat.ipv6IfStatsInHdrErrors, 1);
|
---|
| 383 | goto buf_rel;
|
---|
| 384 | }
|
---|
| 385 |
|
---|
| 386 | /*
|
---|
| 387 | * 次ã®ãã¼ã¿ã°ã©ã ã¯ç ´æ£ããã
|
---|
| 388 | *
|
---|
| 389 | * ã»å§ç¹ã¢ãã¬ã¹ããã«ããã£ã¹ã
|
---|
| 390 | * ã»çµç¹ã¢ãã¬ã¹ãæªå®ç¾©
|
---|
| 391 | *
|
---|
| 392 | * ãããã¯ã¼ã¯ã¤ã³ã¿ãã§ã¼ã¹ãã«ã¼ãããã¯ã§ãªãã¨ãã
|
---|
| 393 | * 次ã®ãã¼ã¿ã°ã©ã ãç ´æ£ããã
|
---|
| 394 | *
|
---|
| 395 | * ã»å§ç¹ã¢ãã¬ã¹ãã«ã¼ãããã¯
|
---|
| 396 | * ã»çµç¹ã¢ãã¬ã¹ãã«ã¼ãããã¯
|
---|
| 397 | *
|
---|
| 398 | * æªæã®ããã¦ã¼ã¶ã TCP/UDP ã¹ã¿ãã¯ã®æ··ä¹±ã
|
---|
| 399 | * ã»ãã¥ãªãã£ãã§ãã¯ããã¤ãã¹ãããããIPv4
|
---|
| 400 | * ãããã¢ãã¬ã¹ãæªç¨ãããã¨ãé²ããã
|
---|
| 401 | * 以ä¸ã®ãã¼ã¿ã°ã©ã ã¯ç ´æ£ããã
|
---|
| 402 | *
|
---|
| 403 | * ã»å§ç¹ã¢ãã¬ã¹ã ::ffff:127.0.0.1
|
---|
| 404 | * ã»çµç¹ã¢ãã¬ã¹ã ::ffff:127.0.0.1
|
---|
| 405 | */
|
---|
| 406 |
|
---|
| 407 | if (IN6_IS_ADDR_MULTICAST(&ip6h->src) ||
|
---|
| 408 | IN6_IS_ADDR_UNSPECIFIED(&ip6h->dst)) {
|
---|
| 409 | NET_COUNT_IP6(net_count_ip6[NC_IP6_IN_ERR_ADDR], 1);
|
---|
| 410 | NET_COUNT_MIB(in6_ifstat.ipv6IfStatsInAddrErrors, 1);
|
---|
| 411 | goto buf_rel;
|
---|
| 412 | }
|
---|
| 413 |
|
---|
| 414 | if (IN6_IS_ADDR_V4MAPPED(&ip6h->src) ||
|
---|
| 415 | IN6_IS_ADDR_V4MAPPED(&ip6h->dst)) {
|
---|
| 416 | NET_COUNT_IP6(net_count_ip6[NC_IP6_IN_ERR_ADDR], 1);
|
---|
| 417 | NET_COUNT_MIB(in6_ifstat.ipv6IfStatsInAddrErrors, 1);
|
---|
| 418 | goto buf_rel;
|
---|
| 419 | }
|
---|
| 420 |
|
---|
| 421 | #ifdef SUPPORT_LOOP
|
---|
| 422 |
|
---|
| 423 | #else /* of #ifdef SUPPORT_LOOP */
|
---|
| 424 |
|
---|
| 425 | if (IN6_IS_ADDR_LOOPBACK(&ip6h->src) ||
|
---|
| 426 | IN6_IS_ADDR_LOOPBACK(&ip6h->dst)) {
|
---|
| 427 | NET_COUNT_IP6(net_count_ip6[NC_IP6_IN_ERR_ADDR], 1);
|
---|
| 428 | NET_COUNT_MIB(in6_ifstat.ipv6IfStatsInAddrErrors, 1);
|
---|
| 429 | goto buf_rel;
|
---|
| 430 | }
|
---|
| 431 |
|
---|
| 432 | #endif /* of #ifdef SUPPORT_LOOP */
|
---|
| 433 |
|
---|
| 434 | ifp = IF_GET_IFNET();
|
---|
| 435 |
|
---|
| 436 | if (IN6_IS_ADDR_MULTICAST(&ip6h->dst)) {
|
---|
| 437 | /* å®å
|
---|
| 438 | ããã«ããã£ã¹ãã®å ´åã®å¦ç */
|
---|
| 439 | NET_COUNT_MIB(in6_ifstat.ipv6IfStatsInMcastPkts, 1);
|
---|
| 440 | if (!in6_lookup_multi(ifp, &ip6h->dst)) {
|
---|
| 441 | NET_COUNT_IP6(net_count_ip6[NC_IP6_IN_ERR_ADDR], 1);
|
---|
| 442 | NET_COUNT_MIB(in6_ifstat.ipv6IfStatsInAddrErrors, 1);
|
---|
| 443 | goto buf_rel;
|
---|
| 444 | }
|
---|
| 445 | }
|
---|
| 446 | else {
|
---|
| 447 | if ((ia6 = in6_lookup_ifaddr(ifp, &ip6h->dst)) == NULL) {
|
---|
| 448 | NET_COUNT_IP6(net_count_ip6[NC_IP6_IN_ERR_ADDR], 1);
|
---|
| 449 | NET_COUNT_MIB(in6_ifstat.ipv6IfStatsInAddrErrors, 1);
|
---|
| 450 | goto buf_rel;
|
---|
| 451 | }
|
---|
| 452 |
|
---|
| 453 | /* ã¢ãã¬ã¹ãæªè§£æ±ºã®å ´åã¯ãã¼ã¿ã°ã©ã ãç ´æ£ããã*/
|
---|
| 454 | if (IFA6_IS_NOTREADY(ia6)) {
|
---|
| 455 | NET_COUNT_IP6(net_count_ip6[NC_IP6_IN_ERR_ADDR], 1);
|
---|
| 456 | NET_COUNT_MIB(in6_ifstat.ipv6IfStatsInAddrErrors, 1);
|
---|
| 457 | goto buf_rel;
|
---|
| 458 | }
|
---|
| 459 | }
|
---|
| 460 |
|
---|
| 461 | /* ãªãã»ãããè¨å®ããã*/
|
---|
| 462 | offp = GET_IP6_NEXT_HDR(input) - input->buf;
|
---|
| 463 |
|
---|
| 464 | /* ãã¤ãã¼ãé·ãåãåºãã*/
|
---|
| 465 | plen = ntohs(ip6h->plen);
|
---|
| 466 |
|
---|
| 467 |
|
---|
| 468 | /* 次ãããã®ä½ç½®ãåæåããã*/
|
---|
| 469 | nextp = offsetof(T_IP6_HDR, next);
|
---|
| 470 |
|
---|
| 471 | /*
|
---|
| 472 | * ä¸ç¶ç¹ (Hop-by-Hop) ãªãã·ã§ã³ãããã®ãã§ãã¯
|
---|
| 473 | */
|
---|
| 474 | if (ip6h->next == IPPROTO_HOPOPTS) {
|
---|
| 475 |
|
---|
| 476 | /* ä¸ç¶ç¹ãããã®é·ãããã§ãã¯ããã*/
|
---|
| 477 | if (plen < sizeof(T_IP6_HBH_HDR)) {
|
---|
| 478 | NET_COUNT_IP6(net_count_ip6[NC_IP6_IN_ERR_SHORT], 1);
|
---|
| 479 | NET_COUNT_MIB(in6_ifstat.ipv6IfStatsInHdrErrors, 1);
|
---|
| 480 | goto buf_rel;
|
---|
| 481 | }
|
---|
| 482 |
|
---|
| 483 | if ((noff = ip6_hopopts_input(input, &offp, &nextp)) < 0) {
|
---|
| 484 | if (noff == IP6_OPT_RET_ERR) {
|
---|
| 485 | NET_COUNT_IP6(net_count_ip6[NC_IP6_IN_ERR_PACKETS], 1);
|
---|
| 486 | NET_COUNT_MIB(in6_ifstat.ipv6IfStatsInHdrErrors, 1);
|
---|
| 487 | goto buf_rel;
|
---|
| 488 | }
|
---|
| 489 | else if (noff == IP6_OPT_RET_REL) {
|
---|
| 490 | NET_COUNT_IP6(net_count_ip6[NC_IP6_IN_ERR_PACKETS], 1);
|
---|
| 491 | NET_COUNT_MIB(in6_ifstat.ipv6IfStatsInHdrErrors, 1);
|
---|
| 492 | return;
|
---|
| 493 | }
|
---|
| 494 | }
|
---|
| 495 |
|
---|
| 496 | /*
|
---|
| 497 | * ãã¤ãã¼ãé·ã 0 ã§ãä¸ç¶ç¹ãªãã·ã§ã³ãããã¨ãã¯ã
|
---|
| 498 | * 巨大ãã¤ãã¼ãã»ãªãã·ã§ã³ãå«ã¾ããªããã°ãªããªãã
|
---|
| 499 | * ãã®ã¨ãã巨大ãã¤ãã¼ãã»ãªãã·ã§ã³ã«ãã
|
---|
| 500 | * ãã¤ãã¼ãé·ããã§ãã¯ããå¿
|
---|
| 501 | è¦ãããããæ¬å®è£
|
---|
| 502 | ã§ã¯ã
|
---|
| 503 | * 巨大ãã¤ãã¼ãã»ãªãã·ã§ã³ãæªç¥ã®ãªãã·ã§ã³ã¨ãã¦
|
---|
| 504 | * æ±ãã®ã§ãä½ãããªãã
|
---|
| 505 | */
|
---|
| 506 | next = ((T_IP6_HBH_HDR *)(ip6h + 1))->next;
|
---|
| 507 | }
|
---|
| 508 | else
|
---|
| 509 | next = ip6h->next;
|
---|
| 510 |
|
---|
| 511 | /* IPv6 ãã¼ã¿ã°ã©ã é·ããã§ãã¯ããã*/
|
---|
| 512 | if (input->len - IF_IP6_HDR_SIZE < plen) {
|
---|
| 513 | NET_COUNT_IP6(net_count_ip6[NC_IP6_IN_ERR_SHORT], 1);
|
---|
| 514 | NET_COUNT_MIB(in6_ifstat.ipv6IfStatsInTruncatedPkts, 1);
|
---|
| 515 | goto buf_rel;
|
---|
| 516 | }
|
---|
| 517 | else if (input->len > IF_IP6_HDR_SIZE + plen)
|
---|
| 518 | input->len = IF_IP6_HDR_SIZE + plen;
|
---|
| 519 |
|
---|
| 520 | /* ä¸ä½ãããã³ã«å¦çé¢æ°ãå¼ã³åºãã*/
|
---|
| 521 | nest = 0;
|
---|
| 522 | while (next != IPPROTO_DONE) {
|
---|
| 523 | if (++ nest > IP6_HDR_NEST_LIMIT) {
|
---|
| 524 | NET_COUNT_IP6(net_count_ip6[NC_IP6_IN_ERR_PROTO], 1);
|
---|
| 525 | NET_COUNT_MIB(in6_ifstat.ipv6IfStatsInUnknownProtos, 1);
|
---|
| 526 | goto buf_rel;
|
---|
| 527 | }
|
---|
| 528 | else if ((func = get_upper_proto(next)) == NULL) {
|
---|
| 529 | NET_COUNT_IP6(net_count_ip6[NC_IP6_IN_ERR_PROTO], 1);
|
---|
| 530 | NET_COUNT_IP6(net_count_ip6[NC_IP6_IN_ERR_PACKETS], 1);
|
---|
| 531 | NET_COUNT_MIB(in6_ifstat.ipv6IfStatsInUnknownProtos, 1);
|
---|
| 532 |
|
---|
| 533 | /* icmp6_error ã§ãããã¯ã¼ã¯ãããã¡ãéæ¾ããã*/
|
---|
| 534 | icmp6_error(input, ICMP6_PARAM_PROB,
|
---|
| 535 | ICMP6_PARAMPROB_NEXT_HEADER, nextp);
|
---|
| 536 | return;
|
---|
| 537 | }
|
---|
| 538 | else {
|
---|
| 539 | next = (*func)(&input, &offp, &nextp);
|
---|
| 540 | }
|
---|
| 541 | }
|
---|
| 542 | return;
|
---|
| 543 |
|
---|
| 544 | buf_rel:
|
---|
| 545 | NET_COUNT_IP6(net_count_ip6[NC_IP6_IN_ERR_PACKETS], 1);
|
---|
| 546 | syscall(rel_net_buf(input));
|
---|
| 547 | }
|
---|
| 548 |
|
---|
| 549 | /*
|
---|
| 550 | * ip6_nexthdr -- 次ã®ãããã®ãªãã»ãããè¿ãã
|
---|
| 551 | *
|
---|
| 552 | * æ»ãå¤ == -1 : æå¾ã®ããããã¾ãã¯ã¨ã©ã¼ã
|
---|
| 553 | * æ»ãå¤ > 0 : ããã«ããããç¶ãã
|
---|
| 554 | */
|
---|
| 555 |
|
---|
| 556 | ER_UINT
|
---|
| 557 | ip6_nexthdr (T_NET_BUF *nbuf, uint_t off, uint_t proto, uint_t *nextp)
|
---|
| 558 | {
|
---|
| 559 | T_IP6_FRAG_HDR *ip6fh;
|
---|
| 560 | T_IP6_EXT_HDR *ip6eh;
|
---|
| 561 |
|
---|
| 562 | switch (proto) {
|
---|
| 563 |
|
---|
| 564 | case IPPROTO_IPV6: /* IPv6 */
|
---|
| 565 | if (nbuf->len < off + IP6_HDR_SIZE)
|
---|
| 566 | return (ER_UINT)-1;
|
---|
| 567 | *nextp = ((T_IP6_HDR *)(nbuf->buf + off))->next;
|
---|
| 568 | return off + IP6_HDR_SIZE;
|
---|
| 569 | break;
|
---|
| 570 |
|
---|
| 571 | case IPPROTO_FRAGMENT: /* æçããã */
|
---|
| 572 | if (nbuf->len < off + sizeof(T_IP6_FRAG_HDR))
|
---|
| 573 | return (ER_UINT)-1;
|
---|
| 574 |
|
---|
| 575 | /* ä¸éã®ãã©ã°ã¡ã³ãã®å ´åã¯å¦çããããã*/
|
---|
| 576 | ip6fh = (T_IP6_FRAG_HDR *)(nbuf->buf + off);
|
---|
| 577 | if (ntohs(ip6fh->off_flag) & IP6F_MORE_FRAG)
|
---|
| 578 | return (ER_UINT)-1;
|
---|
| 579 |
|
---|
| 580 | *nextp = ip6fh->next;
|
---|
| 581 | return off + sizeof(T_IP6_FRAG_HDR);
|
---|
| 582 | break;
|
---|
| 583 |
|
---|
| 584 | case IPPROTO_AH: /* IPv6 èªè¨¼ããã */
|
---|
| 585 | case IPPROTO_HOPOPTS: /* IPv6 ä¸ç¶ç¹ (Hop-by-Hop) ãªãã·ã§ã³ */
|
---|
| 586 | case IPPROTO_ROUTING: /* çµè·¯å¶å¾¡ããã */
|
---|
| 587 | case IPPROTO_DSTOPTS: /* IPv6 çµç¹ãªãã·ã§ã³ */
|
---|
| 588 | if (nbuf->len < off + sizeof(T_IP6_EXT_HDR))
|
---|
| 589 | return (ER_UINT)-1;
|
---|
| 590 |
|
---|
| 591 | ip6eh = (T_IP6_EXT_HDR *)(nbuf->buf + off);
|
---|
| 592 | *nextp = ip6eh->next;
|
---|
| 593 | if (proto == IPPROTO_AH)
|
---|
| 594 | return off + ((ip6eh->len + 2) << 2);
|
---|
| 595 | else
|
---|
| 596 | return off + ((ip6eh->len + 1) << 3);
|
---|
| 597 | break;
|
---|
| 598 | }
|
---|
| 599 |
|
---|
| 600 | return (ER_UINT)-1;
|
---|
| 601 | }
|
---|
| 602 |
|
---|
| 603 | /*
|
---|
| 604 | * ip6_lasthdr -- æå¾ã®ãããã®ãªãã»ãããè¿ãã
|
---|
| 605 | */
|
---|
| 606 |
|
---|
| 607 | ER_UINT
|
---|
| 608 | ip6_lasthdr (T_NET_BUF *nbuf, uint_t off, uint_t proto, uint_t *nextp)
|
---|
| 609 | {
|
---|
| 610 | ER_UINT newoff;
|
---|
| 611 |
|
---|
| 612 | while (1) {
|
---|
| 613 | newoff = ip6_nexthdr(nbuf, off, proto, nextp);
|
---|
| 614 | if (newoff < 0)
|
---|
| 615 | return (ER_UINT)off;
|
---|
| 616 | off = newoff;
|
---|
| 617 | proto = *nextp;
|
---|
| 618 | }
|
---|
| 619 | return (ER_UINT)0u;
|
---|
| 620 | }
|
---|
| 621 |
|
---|
| 622 | /*
|
---|
| 623 | * ip6_unknown_opt -- æªç¥ã®ãªãã·ã§ã³ã®å¦ç
|
---|
| 624 | *
|
---|
| 625 | * æ»ãå¤:
|
---|
| 626 | *
|
---|
| 627 | * 0 ä»¥ä¸ æ£å¸¸ããªãã·ã§ã³é·ã
|
---|
| 628 | * IP6_OPT_RET_ERR (-1) ã¨ã©ã¼ãå¼åºå´ã§ãããã¯ã¼ã¯ãããã¡ãéæ¾ããã
|
---|
| 629 | * IP6_OPT_RET_REL (-2) ã¨ã©ã¼ããããã¯ã¼ã¯ãããã¡ã¯éæ¾ããã¦ããã
|
---|
| 630 | */
|
---|
| 631 |
|
---|
| 632 | ER_UINT
|
---|
| 633 | ip6_unknown_opt (T_NET_BUF *input, uint8_t *opt)
|
---|
| 634 | {
|
---|
| 635 | switch (IP6OPT_TYPE(*opt)) {
|
---|
| 636 | case IP6OPT_TYPE_SKIP: /* ç¡è¦ããã */
|
---|
| 637 | return *(opt + 1);
|
---|
| 638 | break;
|
---|
| 639 | case IP6OPT_TYPE_ICMP: /* ç ´æ£ãã¦ããã«ããã£ã¹ãã§ãªããã° ICMP ãè¿éããã */
|
---|
| 640 | if (IN6_IS_ADDR_MULTICAST(&GET_IP6_HDR(input)->dst))
|
---|
| 641 | return IP6_OPT_RET_ERR;
|
---|
| 642 | /* no break; */
|
---|
| 643 | case IP6OPT_TYPE_FORCEICMP: /* ç ´æ£ãã¦ãICMP ãè¿éããã */
|
---|
| 644 | icmp6_error(input, ICMP6_PARAM_PROB,
|
---|
| 645 | ICMP6_PARAMPROB_OPTION,
|
---|
| 646 | (opt - input->buf) - IF_HDR_SIZE);
|
---|
| 647 | return IP6_OPT_RET_REL;
|
---|
| 648 | break;
|
---|
| 649 | /*case IP6OPT_TYPE_DISCARD: ãã¼ã¿ã°ã©ã ãç ´æ£ããã */
|
---|
| 650 | }
|
---|
| 651 |
|
---|
| 652 | return IP6_OPT_RET_ERR;
|
---|
| 653 | }
|
---|
| 654 |
|
---|
| 655 | /*
|
---|
| 656 | * ip6_remove_exthdrs -- IPv6 æ¡å¼µããããåé¤ãã以éãåã«è©°ããã
|
---|
| 657 | */
|
---|
| 658 |
|
---|
| 659 | ER
|
---|
| 660 | ip6_remove_exthdrs (T_NET_BUF *nbuf)
|
---|
| 661 | {
|
---|
| 662 | ER_UINT off;
|
---|
| 663 | uint_t next;
|
---|
| 664 |
|
---|
| 665 | /* éå§ãªãã»ããã IP ãããã«è¨å®ããã*/
|
---|
| 666 | off = ((uint8_t *)GET_IP6_HDR(nbuf)) - nbuf->buf;
|
---|
| 667 |
|
---|
| 668 | /* æçµããããæ¢ç´¢ããã*/
|
---|
| 669 | off = ip6_lasthdr(nbuf, off, IPPROTO_IPV6, &next);
|
---|
| 670 |
|
---|
| 671 | if (off <= 0)
|
---|
| 672 | return E_OBJ;
|
---|
| 673 | else {
|
---|
| 674 | uint_t sdu;
|
---|
| 675 |
|
---|
| 676 | sdu = GET_IP6_SDU(nbuf) - nbuf->buf;
|
---|
| 677 | if (off > sdu) {
|
---|
| 678 | memmove(nbuf->buf + sdu, nbuf->buf + off, off - sdu);
|
---|
| 679 | GET_IP6_HDR(nbuf)->plen -= off - sdu;
|
---|
| 680 | nbuf->len -= off - sdu;
|
---|
| 681 | }
|
---|
| 682 | }
|
---|
| 683 | return E_OK;
|
---|
| 684 | }
|
---|
| 685 |
|
---|
| 686 | #endif /* of #ifdef _IP6_CFG */
|
---|