| 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: route6.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/route6.c,v 1.6 2002/10/16 01:54:45 sam Exp $ */
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| 47 | /* $KAME: route6.c,v 1.24 2001/03/14 03:07:05 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 | #ifdef TARGET_KERNEL_ASP
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| 79 |
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| 80 | #include <kernel.h>
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| 81 | #include <sil.h>
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| 82 |
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| 83 | #endif /* of #ifdef TARGET_KERNEL_ASP */
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| 84 |
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| 85 | #ifdef TARGET_KERNEL_JSP
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| 86 |
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| 87 | #include <s_services.h>
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| 88 | #include <t_services.h>
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| 89 |
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| 90 | #endif /* of #ifdef TARGET_KERNEL_JSP */
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| 91 |
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| 92 | #include <tinet_defs.h>
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| 93 | #include <tinet_config.h>
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| 94 |
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| 95 | #include <net/net.h>
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| 96 | #include <net/net_endian.h>
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| 97 | #include <net/if.h>
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| 98 | #include <net/if_loop.h>
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| 99 | #include <net/if_ppp.h>
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| 100 | #include <net/ethernet.h>
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| 101 | #include <net/if_arp.h>
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| 102 | #include <net/ppp_ipcp.h>
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| 103 | #include <net/net_buf.h>
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| 104 | #include <net/net_count.h>
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| 105 |
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| 106 | #include <netinet/in.h>
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| 107 | #include <netinet/in_var.h>
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| 108 | #include <netinet/ip.h>
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| 109 | #include <netinet/ip_var.h>
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| 110 | #include <netinet/ip_icmp.h>
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| 111 | #include <netinet6/nd6.h>
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| 112 |
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| 113 | #ifdef _IP6_CFG
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| 114 |
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| 115 | #if 0
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| 116 | /*
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| 117 | * é信帯åãé£ãã¤ã¶ãæ»æã¸ã®å¯¾å¿ã®ããã
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| 118 | * ã¿ã¤ã 0 çµè·¯å¶å¾¡ãããã®å¦çãè¡ããªãã
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| 119 | */
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| 120 |
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| 121 | /*
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| 122 | * ip6_rthdr0 -- ã¿ã¤ã 0 çµè·¯å¶å¾¡ãããã®å
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| 123 | ¥åé¢æ°
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| 124 | */
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| 125 |
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| 126 | static ER
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| 127 | ip6_rthdr0 (T_NET_BUF *input, T_IP6_RT0_HDR *rt0h)
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| 128 | {
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| 129 | if (rt0h->segleft == 0) {
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| 130 | /* ä¸ç¶ãã¼ãæ°ã¯ 0 ãªã®ã§ãçµç¹ãã¼ã */
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| 131 | return E_OK;
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| 132 | }
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| 133 |
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| 134 | /* len 㨠segleft ã®æ£å½æ§ãã§ã㯠*/
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| 135 | #ifdef IP6_CFG_COMPAT_RFC1883
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| 136 | if ((rt0h->len % 2) || (rt0h->len > 46)) {
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| 137 | #else
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| 138 | if (rt0h->len % 2) {
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| 139 | #endif
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| 140 | /*
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| 141 | * len ã¯å¶æ°ã§ã(23 * 2) ã¾ã§ã
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| 142 | * ãã ãã(23 * 2) ã®å¶é㯠RFC 2462 ã§åé¤ããã¦ããã
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| 143 | */
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| 144 | icmp6_error(input, ICMP6_PARAM_PROB,
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| 145 | ICMP6_PARAMPROB_HEADER,
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| 146 | ((uint8_t*)&rt0h->len - input->buf) - IF_HDR_SIZE);
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| 147 | return E_PAR;
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| 148 | }
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| 149 |
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| 150 | /* len ãä¸ç¶ãã¼ãæ°ã¨çç¾ãã¦ããªãããã§ãã¯ããã*/
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| 151 | if ((rt0h->len / 2) < rt0h->segleft) {
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| 152 | /*
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| 153 | * len 㯠8ãªã¯ãããåä½ãsegleft 㯠16ãªã¯ãããåä½ãªã®ã§ã
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| 154 | * len / 2 == segleft ã¨ãªãã¯ãã
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| 155 | * len / 2 < segleft ã¯ã¨ã©ã¼ã
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| 156 | */
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| 157 | icmp6_error(input, ICMP6_PARAM_PROB,
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| 158 | ICMP6_PARAMPROB_HEADER,
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| 159 | ((uint8_t*)&rt0h->segleft - input->buf) - IF_HDR_SIZE);
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| 160 | return E_PAR;
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| 161 | }
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| 162 |
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| 163 | /*
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| 164 | * æ®ãã®ä¸ç¶ãã¼ãæ°ã 1 以ä¸ã§ããã°ããã®ãã¼ãã¯æçµçãª
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| 165 | * çµç¹ãã¼ãã§ã¯ãªããæ¬å®è£
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| 166 | ã§ã¯ãä¸ç¶ãããªãã®ã§ã
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| 167 | * å
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| 168 | ¥åãã¼ã¿ã°ã©ã ã®å¦çãçµäºããã
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| 169 | */
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| 170 | syscall(rel_net_buf(input));
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| 171 | return E_PAR;
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| 172 | }
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| 173 |
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| 174 | #endif
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| 175 |
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| 176 | /*
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| 177 | * route6_input -- çµè·¯å¶å¾¡ãããã®å
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| 178 | ¥åé¢æ°
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| 179 | */
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| 180 |
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| 181 | uint_t
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| 182 | route6_input (T_NET_BUF **inputp, uint_t *offp, uint_t *nextp)
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| 183 | {
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| 184 | T_NET_BUF *input = *inputp;
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| 185 | T_IP6_RT_HDR *rth;
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| 186 | uint_t len, off = *offp;
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| 187 |
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| 188 | /* ãããã¯ã¼ã¯ãããã¡ã®æ®ãã®é·ãããã§ãã¯ããã*/
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| 189 | if (input->len - off < sizeof(T_IP6_RT_HDR))
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| 190 | goto buf_rel;
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| 191 |
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| 192 | rth = (T_IP6_RT_HDR *)(input->buf + off);
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| 193 | len = (rth->len + 1) << 3;
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| 194 |
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| 195 | /* çµè·¯å¶å¾¡ãããã®é·ãããã§ãã¯ããã*/
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| 196 | if (input->len < off + len)
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| 197 | goto buf_rel;
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| 198 |
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| 199 | #if 0
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| 200 | /*
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| 201 | * é信帯åãé£ãã¤ã¶ãæ»æã¸ã®å¯¾å¿ã®ããã
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| 202 | * ã¿ã¤ã 0 çµè·¯å¶å¾¡ãããã®å¦çãè¡ããªãã
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| 203 | */
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| 204 | if (rth->type == IPV6_RTHDR_TYPE_0) {
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| 205 | if (ip6_rthdr0(input, (T_IP6_RT0_HDR*)rth) != E_OK) {
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| 206 |
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| 207 | /* ã¨ã©ã¼ã®å ´åã¯ãip6_rthdr0 ã§ãããã¡ãéæ¾ãã¦ããã*/
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| 208 | return IPPROTO_DONE;
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| 209 | }
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| 210 | }
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| 211 | else if (rth->segleft != 0) {
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| 212 |
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| 213 | /*
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| 214 | * æ®ãã®ä¸ç¶ãã¼ãæ°ã 1 以ä¸ã§ããã°ããã®ãã¼ãã¯æçµçãª
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| 215 | * çµç¹ãã¼ãã§ã¯ãªããæ¬å®è£
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| 216 | ã§ã¯ãä¸ç¶ãããªãã®ã§ã
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| 217 | * ICMP6 ã¨ã©ã¼ãè¿éãã¦å¦çãçµäºããã
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| 218 | */
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| 219 | icmp6_error(input, ICMP6_PARAM_PROB,
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| 220 | ICMP6_PARAMPROB_HEADER,
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| 221 | ((uint8_t*)&rth->type - input->buf) - IF_HDR_SIZE);
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| 222 | return IPPROTO_DONE;
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| 223 | }
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| 224 | #else
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| 225 | if (rth->segleft != 0) {
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| 226 |
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| 227 | /*
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| 228 | * æ®ãã®ä¸ç¶ãã¼ãæ°ã 1 以ä¸ã§ããã°ããã®ãã¼ãã¯æçµçãª
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| 229 | * çµç¹ãã¼ãã§ã¯ãªããæ¬å®è£
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| 230 | ã§ã¯ãä¸ç¶ãããªãã®ã§ã
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| 231 | * ICMP6 ã¨ã©ã¼ãè¿éãã¦å¦çãçµäºããã
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| 232 | */
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| 233 | icmp6_error(input, ICMP6_PARAM_PROB,
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| 234 | ICMP6_PARAMPROB_HEADER,
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| 235 | ((uint8_t*)&rth->type - input->buf) - IF_HDR_SIZE);
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| 236 | return IPPROTO_DONE;
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| 237 | }
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| 238 | #endif
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| 239 |
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| 240 | *nextp = *offp - IF_HDR_SIZE + offsetof(T_IP6_RT_HDR, next);
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| 241 | *offp += len;
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| 242 | return rth->next;
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| 243 |
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| 244 | buf_rel:
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| 245 | syscall(rel_net_buf(input));
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| 246 | return IPPROTO_DONE;
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| 247 | }
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| 248 |
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| 249 | #endif /* of #ifdef _IP6_CFG */
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