[270] | 1 | /*
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| 2 | * TINET (TCP/IP Protocol Stack)
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| 3 | *
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| 4 | * Copyright (C) 2001-2009 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: udp_input.c 270 2017-02-09 04:03:47Z coas-nagasima $
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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 reproduce 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 | #include <string.h>
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| 80 |
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| 81 | #ifdef TARGET_KERNEL_ASP
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| 82 |
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| 83 | #include <kernel.h>
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| 84 | #include <sil.h>
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| 85 | #include <t_syslog.h>
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| 86 |
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| 87 | #endif /* of #ifdef TARGET_KERNEL_ASP */
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| 88 |
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| 89 | #ifdef TARGET_KERNEL_JSP
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| 90 |
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| 91 | #include <s_services.h>
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| 92 | #include <t_services.h>
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| 93 | #include "kernel_id.h"
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| 94 |
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| 95 | #endif /* of #ifdef TARGET_KERNEL_JSP */
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| 96 |
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| 97 | #include <tinet_defs.h>
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| 98 | #include <tinet_config.h>
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| 99 |
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| 100 | #include <net/if.h>
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| 101 | #include <net/if_loop.h>
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| 102 | #include <net/if_ppp.h>
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| 103 | #include <net/ethernet.h>
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| 104 | #include <net/ppp_ipcp.h>
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| 105 | #include <net/net.h>
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| 106 | #include <net/net_buf.h>
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| 107 | #include <net/net_count.h>
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| 108 |
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| 109 | #include <netinet/in.h>
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| 110 | #include <netinet/in_var.h>
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| 111 | #include <netinet6/in6.h>
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| 112 | #include <netinet6/in6_var.h>
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| 113 | #include <netinet/in_itron.h>
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| 114 | #include <netinet/ip.h>
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| 115 | #include <netinet/ip_var.h>
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| 116 | #include <netinet/ip6.h>
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| 117 | #include <netinet6/ip6_var.h>
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| 118 | #include <netinet/ip_icmp.h>
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| 119 | #include <netinet/icmp6.h>
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| 120 |
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| 121 | #include <netinet/udp.h>
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| 122 | #include <netinet/udp_var.h>
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| 123 |
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| 124 | #include <net/if_var.h>
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| 125 |
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| 126 | #ifdef SUPPORT_UDP
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| 127 |
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| 128 | #ifdef SUPPORT_MIB
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| 129 |
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| 130 | /*
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| 131 | * SNMP 㮠管çæ
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| 132 | å ±ãã¼ã¹ (MIB)
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| 133 | */
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| 134 |
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| 135 | T_UDP_STATS udp_stats;
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| 136 |
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| 137 | #endif /* of #ifdef SUPPORT_MIB */
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| 138 |
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| 139 | #if defined(SUPPORT_INET4)
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| 140 |
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| 141 | #ifdef DHCP_CFG
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| 142 |
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| 143 | /*
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| 144 | * udp_dstaddr_accept -- UDP ã®ãã¦å
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| 145 | ã¢ãã¬ã¹ãæ£ããããã§ãã¯ããã
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| 146 | *
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| 147 | * DHCP_CFG ãå®ç¾©ããã¦ããã¨ãã¯ã以ä¸ã®ãã¼ã¿ã°ã©ã ãåä¿¡ããã
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| 148 | *
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| 149 | * ã»ãã¦å
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| 150 | ã¢ãã¬ã¹ãããã¼ããã£ã¹ã
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| 151 | * ã»ãã¼ã«ã«ã¢ãã¬ã¹ãæªå®ç¾©
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| 152 | */
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| 153 |
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| 154 | static bool_t
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| 155 | udp_is_dstaddr_accept (T_IN4_ADDR *myaddr, T_IN4_ADDR *dstaddr)
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| 156 | {
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| 157 | T_IFNET *ifp = IF_GET_IFNET();
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| 158 |
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| 159 | if (ifp->in_ifaddr.addr == IPV4_ADDRANY ||
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| 160 | ntohl(*dstaddr) == IPV4_ADDR_BROADCAST ||
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| 161 | ntohl(*dstaddr) == ((ifp->in_ifaddr.addr & ifp->in_ifaddr.mask) | ~ifp->in_ifaddr.mask))
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| 162 | return true;
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| 163 | else
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| 164 | return IN_IS_DSTADDR_ACCEPT(myaddr, dstaddr);
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| 165 | }
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| 166 |
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| 167 | #elif defined(ETHER_CFG_MULTICAST)
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| 168 |
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| 169 | /*
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| 170 | * udp_dstaddr_accept -- UDP ã®ãã¦å
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| 171 | ã¢ãã¬ã¹ãæ£ããããã§ãã¯ããã
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| 172 | *
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| 173 | * 以ä¸ã®å ´åããã¼ã¿ã°ã©ã ãåä¿¡ããã
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| 174 | *
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| 175 | * ã»ãã¦å
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| 176 | ã¢ãã¬ã¹ãããã¼ããã£ã¹ã
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| 177 | */
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| 178 |
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| 179 | static bool_t
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| 180 | udp_is_dstaddr_accept (T_IN4_ADDR *myaddr, T_IN4_ADDR *dstaddr)
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| 181 | {
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| 182 | T_IFNET *ifp = IF_GET_IFNET();
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| 183 | T_IN4_ADDR dst = ntohl(*dstaddr);
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| 184 |
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| 185 | if (dst == IPV4_ADDR_BROADCAST ||
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| 186 | dst == ((ifp->in_ifaddr.addr & ifp->in_ifaddr.mask) | ~ifp->in_ifaddr.mask) ||
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| 187 | IN4_IS_ADDR_MULTICAST(dst))
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| 188 | return true;
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| 189 | else
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| 190 | return IN_IS_DSTADDR_ACCEPT(myaddr, dstaddr);
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| 191 | }
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| 192 |
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| 193 | #else /* of #ifdef DHCP_CFG */
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| 194 |
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| 195 | /*
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| 196 | * udp_dstaddr_accept -- UDP ã®ãã¦å
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| 197 | ã¢ãã¬ã¹ãæ£ããããã§ãã¯ããã
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| 198 | *
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| 199 | * 以ä¸ã®å ´åããã¼ã¿ã°ã©ã ãåä¿¡ããã
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| 200 | *
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| 201 | * ã»ãã¦å
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| 202 | ã¢ãã¬ã¹ãããã¼ããã£ã¹ã
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| 203 | */
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| 204 |
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| 205 | static bool_t
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| 206 | udp_is_dstaddr_accept (T_IN4_ADDR *myaddr, T_IN4_ADDR *dstaddr)
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| 207 | {
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| 208 | T_IFNET *ifp = IF_GET_IFNET();
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| 209 |
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| 210 | if (ntohl(*dstaddr) == IPV4_ADDR_BROADCAST ||
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| 211 | ntohl(*dstaddr) == ((ifp->in_ifaddr.addr & ifp->in_ifaddr.mask) | ~ifp->in_ifaddr.mask))
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| 212 | return true;
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| 213 | else
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| 214 | return IN_IS_DSTADDR_ACCEPT(myaddr, dstaddr);
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| 215 | }
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| 216 |
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| 217 | #endif /* of #ifdef DHCP_CFG */
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| 218 |
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| 219 | #endif /* of #if defined(SUPPORT_INET4) */
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| 220 |
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| 221 | #if defined(SUPPORT_INET6)
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| 222 |
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| 223 | /*
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| 224 | * udp_dstaddr_accept -- UDP ã®ãã¦å
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| 225 | ã¢ãã¬ã¹ãæ£ããããã§ãã¯ããã
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| 226 | *
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| 227 | * 以ä¸ã®å ´åããã¼ã¿ã°ã©ã ãåä¿¡ããã
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| 228 | *
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| 229 | * ã»ãã¦å
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| 230 | ã¢ãã¬ã¹ããã«ããã£ã¹ã
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| 231 | */
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| 232 |
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| 233 | static bool_t
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| 234 | udp_is_dstaddr_accept (T_IN6_ADDR *myaddr, T_IN6_ADDR *dstaddr)
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| 235 | {
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| 236 | if (IN6_IS_ADDR_MULTICAST(dstaddr))
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| 237 | return true;
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| 238 | else
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| 239 | return IN_IS_DSTADDR_ACCEPT(myaddr, dstaddr);
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| 240 | }
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| 241 |
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| 242 | #endif /* of #if defined(SUPPORT_INET6) */
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| 243 |
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| 244 | /*
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| 245 | * udp_input -- UDP ã®å
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| 246 | ¥åé¢æ°
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| 247 | */
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| 248 |
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| 249 | uint_t
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| 250 | udp_input (T_NET_BUF **inputp, uint_t *offp, uint_t *nextp)
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| 251 | {
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| 252 | T_NET_BUF *input = *inputp;
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| 253 | T_UDP_CEP *cep;
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| 254 | T_UDP_HDR *udph;
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| 255 | T_IP_HDR *iph;
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| 256 | int_t ix;
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| 257 | uint_t len, hlen, ulen;
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| 258 |
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| 259 | hlen = (uint_t)GET_IF_IP_HDR_SIZE(input);
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| 260 |
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| 261 | NET_COUNT_UDP(net_count_udp.in_octets, input->len - hlen);
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| 262 | NET_COUNT_UDP(net_count_udp.in_packets, 1);
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| 263 | NET_COUNT_MIB(udp_stats.udpInDatagrams, 1);
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| 264 |
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| 265 | /* ãããé·ããã§ãã¯ããã*/
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| 266 | if (input->len < hlen + UDP_HDR_SIZE)
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| 267 | goto buf_rel;
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| 268 |
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| 269 | udph = (T_UDP_HDR *)(input->buf + *offp);
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| 270 |
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| 271 | /* ãã¼ã¿ã°ã©ã é·ããã§ãã¯ãã */
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| 272 | ulen = ntohs(udph->ulen);
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| 273 | if (ulen != input->len - hlen)
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| 274 | goto buf_rel;
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| 275 |
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| 276 | /* å®å
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| 277 | ãã¼ãã 0 ã®ãã¼ã¿ã°ã©ã ã¯ç ´æ£ãããRFC768 */
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| 278 | if (udph->dport == 0)
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| 279 | goto buf_rel;
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| 280 |
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| 281 | #ifdef UDP_CFG_IN_CHECKSUM
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| 282 |
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| 283 | /* ãã§ãã¯ãµã ããã§ãã¯ãã */
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| 284 | if (udph->sum && IN_CKSUM(input, IPPROTO_UDP, *offp, ulen) != 0)
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| 285 | goto buf_rel;
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| 286 |
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| 287 | #endif /* of #ifdef UDP_CFG_IN_CHECKSUM */
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| 288 |
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| 289 | iph = GET_IP_HDR(input);
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| 290 |
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| 291 | /* å®å
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| 292 | ã¢ãã¬ã¹ã¨ãã¼ãããã§ãã¯ãã */
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| 293 | for (ix = tmax_udp_ccepid; ix -- > 0; ) {
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| 294 | cep = &udp_cep[ix];
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| 295 | if (VALID_UDP_CEP(cep) &&
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| 296 | udp_is_dstaddr_accept(&cep->myaddr.ipaddr, &iph->dst) &&
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| 297 | ntohs(udph->dport) == cep->myaddr.portno) {
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| 298 | len = (uint_t)(ntohs(udph->ulen) - UDP_HDR_SIZE);
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| 299 |
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| 300 | if (cep->rcv_tskid != TA_NULL) { /* éãã³ããããã³ã°ã³ã¼ã«ã§ãã³ãã£ã³ã°ä¸ */
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| 301 | if (psnd_dtq(cep->rcvqid, (intptr_t)input) != E_OK)
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| 302 | goto buf_rel;
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| 303 | }
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| 304 |
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| 305 | #ifdef UDP_CFG_NON_BLOCKING
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| 306 |
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| 307 | else if (cep->rcv_p_dstaddr != NULL) { /* ãã³ããããã³ã°ã³ã¼ã«ã§ãã³ãã£ã³ã°ä¸ */
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| 308 |
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| 309 | /* p_dstaddr ãè¨å®ããã*/
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| 310 | cep->rcv_p_dstaddr->portno = ntohs(udph->sport);
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| 311 | IN_COPY_TO_HOST(&cep->rcv_p_dstaddr->ipaddr, &GET_IP_HDR(input)->src);
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| 312 |
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| 313 | /* ãã¼ã¿ããããã¡ã«ç§»ãã*/
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| 314 | memcpy(cep->rcv_data, GET_UDP_SDU(input, *offp),
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| 315 | (size_t)(len < cep->rcv_len ? len : cep->rcv_len));
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| 316 | syscall(rel_net_buf(input));
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| 317 |
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| 318 | if (IS_PTR_DEFINED(cep->callback))
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| 319 |
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| 320 | #ifdef TCP_CFG_NON_BLOCKING_COMPAT14
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| 321 |
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| 322 | (*cep->callback)(GET_UDP_CEPID(cep), TFN_UDP_RCV_DAT, (void*)(uint32_t)len);
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| 323 |
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| 324 | #else /* of #ifdef TCP_CFG_NON_BLOCKING_COMPAT14 */
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| 325 |
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| 326 | (*cep->callback)(GET_UDP_CEPID(cep), TFN_UDP_RCV_DAT, (void*)&len);
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| 327 |
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| 328 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING_COMPAT14 */
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| 329 |
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| 330 | else
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| 331 | syslog(LOG_WARNING, "[UDP] no call back, CEP: %d.", GET_UDP_CEPID(cep));
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| 332 | cep->rcv_p_dstaddr = NULL;
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| 333 | }
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| 334 |
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| 335 | #endif /* of #ifdef UDP_CFG_NON_BLOCKING */
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| 336 |
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| 337 | else if (IS_PTR_DEFINED(cep->callback)) {
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| 338 |
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| 339 | /* ã³ã¼ã«ããã¯é¢æ°ãå¼ã³åºãã*/
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| 340 | cep->cb_netbuf = input;
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| 341 |
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| 342 | #ifdef TCP_CFG_NON_BLOCKING_COMPAT14
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| 343 |
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| 344 | (*cep->callback)(GET_UDP_CEPID(cep), TEV_UDP_RCV_DAT, (void*)(uint32_t)len);
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| 345 |
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| 346 | #else /* of #ifdef TCP_CFG_NON_BLOCKING_COMPAT14 */
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| 347 |
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| 348 | (*cep->callback)(GET_UDP_CEPID(cep), TEV_UDP_RCV_DAT, (void*)&len);
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| 349 |
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| 350 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING_COMPAT14 */
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| 351 |
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| 352 | /*
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| 353 | * ãããã¯ã¼ã¯ãããã¡ããã®ã¾ã¾ã§ããã°ãã³ã¼ã«ããã¯é¢æ°å
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| 354 | ã§
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| 355 | * ãã¼ã¿ãèªã¿åºããªãã£ããã¨ã«ãªãã®ã§ãæ¨ã¦ãã
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| 356 | */
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| 357 | if (cep->cb_netbuf != NULL)
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| 358 | syscall(rel_net_buf(cep->cb_netbuf));
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| 359 | }
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| 360 | else
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| 361 | goto buf_rel;
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| 362 |
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| 363 | return IPPROTO_DONE;
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| 364 | }
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| 365 | }
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| 366 |
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| 367 | NET_COUNT_MIB(udp_stats.udpNoPorts, 1);
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| 368 |
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| 369 | #if defined(SUPPORT_INET4)
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| 370 |
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| 371 | /* ãã¼ã«ã« IP ã¢ãã¬ã¹ã«å±ãããã¼ã¿ã°ã©ã ã®ã¿ ICMP ã¨ã©ã¼ãéç¥ããã*/
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| 372 | if (ntohl(iph->dst) == IF_GET_IFNET()->in_ifaddr.addr) {
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| 373 | syslog(LOG_INFO, "[UDP] unexp port: %d.", ntohs(udph->dport));
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| 374 |
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| 375 | icmp_error(ICMP4_UNREACH_PORT, input);
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| 376 | /* icmp_error ã§ã¯ããããã¯ã¼ã¯ãããã¡ input ãè¿å´ããªãã®ã§ä¸ã¸æããã*/
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| 377 | }
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| 378 |
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| 379 | #endif /* of #if defined(SUPPORT_INET4) */
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| 380 |
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| 381 | #if defined(SUPPORT_INET6)
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| 382 |
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| 383 | /* ãã«ããã£ã¹ãã¢ãã¬ã¹ã«å±ãããã¼ã¿ã°ã©ã 㯠ICMP ã¨ã©ã¼ãéç¥ããªãã*/
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| 384 | if (!IN6_IS_ADDR_MULTICAST(&iph->dst)) {
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| 385 | syslog(LOG_INFO, "[UDP] unexp port: %d.", ntohs(udph->dport));
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| 386 |
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| 387 | /* icmp6_error ã§ããããã¯ã¼ã¯ãããã¡ input ãè¿å´ããã*/
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| 388 | icmp6_error(input, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
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| 389 |
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| 390 | NET_COUNT_UDP(net_count_udp.in_err_packets, 1);
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| 391 | NET_COUNT_MIB(udp_stats.udpInErrors, 1);
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| 392 | return IPPROTO_DONE;
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| 393 | }
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| 394 |
|
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| 395 | #endif /* of #if defined(SUPPORT_INET6) */
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| 396 |
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| 397 | buf_rel:
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| 398 | NET_COUNT_UDP(net_count_udp.in_err_packets, 1);
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| 399 | NET_COUNT_MIB(udp_stats.udpInErrors, 1);
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| 400 | syscall(rel_net_buf(input));
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| 401 | return IPPROTO_DONE;
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| 402 | }
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| 403 |
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| 404 | #endif /* of #ifdef SUPPORT_UDP */
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