| 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: if_loop.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 | /*
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| 47 | * Copyright (c) 1982, 1986, 1993
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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 | * @(#)if_loop.c 8.1 (Berkeley) 6/10/93
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| 79 | * $FreeBSD: src/sys/net/if_loop.c,v 1.37.2.1 1999/08/29 16:28:19 peter Exp $
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| 80 | */
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| 81 |
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| 82 | #ifdef TARGET_KERNEL_ASP
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| 83 |
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| 84 | #include <kernel.h>
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| 85 | #include <sil.h>
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| 86 | #include <t_syslog.h>
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| 87 | #include "kernel_cfg.h"
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| 88 |
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| 89 | #endif /* of #ifdef TARGET_KERNEL_ASP */
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| 90 |
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| 91 | #ifdef TARGET_KERNEL_JSP
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| 92 |
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| 93 | #include <s_services.h>
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| 94 | #include <t_services.h>
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| 95 | #include "kernel_id.h"
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| 96 |
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| 97 | #endif /* of #ifdef TARGET_KERNEL_JSP */
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| 98 |
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| 99 | #include <tinet_defs.h>
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| 100 | #include <tinet_config.h>
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| 101 |
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| 102 | #include <net/if.h>
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| 103 | #include <net/if_loop.h>
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| 104 | #include <net/net.h>
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| 105 | #include <net/net_endian.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 <netinet/ip.h>
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| 112 | #include <netinet/ip_var.h>
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| 113 | #include <netinet/tcp.h>
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| 114 | #include <netinet/udp.h>
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| 115 |
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| 116 | #include <net/if_var.h>
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| 117 |
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| 118 | #ifdef SUPPORT_LOOP
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| 119 |
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| 120 | /*
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| 121 | * ãã¼ã«ã«ã«ã¼ãããã¯ã¤ã³ã¿ãã§ã¼ã¹
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| 122 | */
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| 123 |
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| 124 | /*
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| 125 | * å¤é¨é¢æ°ã®å®ç¾©
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| 126 | */
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| 127 |
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| 128 | extern const char *itron_strerror (ER ercd);
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| 129 |
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| 130 | /*
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| 131 | * å¤æ°
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| 132 | */
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| 133 |
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| 134 | /* ãããã¯ã¼ã¯ã¤ã³ã¿ãã§ã¼ã¹æ§é ä½ */
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| 135 |
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| 136 | #if defined(_IP6_CFG)
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| 137 |
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| 138 | static T_IFNET loop_ifnet = {
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| 139 | NULL, /* ãããã¯ã¼ã¯ã¤ã³ã¿ãã§ã¼ã¹ã®ã½ããã¦ã§ã¢æ
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| 140 | å ± */
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| 141 | {}, /* IPv6 ã¢ãã¬ã¹æ
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| 142 | å ± */
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| 143 | {}, /* ãã«ããã£ã¹ã IPv6 ã¢ãã¬ã¹ */
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| 144 | };
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| 145 |
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| 146 | #elif defined(_IP4_CFG) /* of #if defined(_IP6_CFG) */
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| 147 |
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| 148 | static T_IFNET loop_ifnet = {
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| 149 | NULL, /* ãããã¯ã¼ã¯ã¤ã³ã¿ãã§ã¼ã¹ã®ã½ããã¦ã§ã¢æ
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| 150 | å ± */
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| 151 | {
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| 152 | IPV4_ADDR_LOOPBACK, /* IPv4 ã¢ãã¬ã¹ */
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| 153 | IPV4_ADDR_LOOPBACK_MASK, /* ãµãããããã¹ã¯ */
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| 154 | },
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| 155 | };
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| 156 |
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| 157 | #endif /* of #if defined(_IP6_CFG) */
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| 158 |
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| 159 | /*
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| 160 | * loop_get_ifnet -- ãããã¯ã¼ã¯ã¤ã³ã¿ãã§ã¼ã¹æ§é ä½ãè¿ãã
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| 161 | */
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| 162 |
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| 163 | T_IFNET *
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| 164 | loop_get_ifnet (void)
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| 165 | {
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| 166 | return &loop_ifnet;
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| 167 | }
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| 168 |
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| 169 | /*
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| 170 | * looutput -- ãã¼ã«ã«ã«ã¼ãããã¯ã¤ã³ã¿ãã§ã¼ã¹ã®åºåé¢æ°
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| 171 | */
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| 172 |
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| 173 | ER
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| 174 | looutput (T_NET_BUF *output, TMO tmout)
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| 175 | {
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| 176 | ER error;
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| 177 |
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| 178 | NET_COUNT_LOOP(net_count_loop.out_octets, output->len);
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| 179 | NET_COUNT_LOOP(net_count_loop.out_packets, 1);
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| 180 |
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| 181 | if ((error = tsnd_dtq(DTQ_LOOP_OUTPUT, output, tmout)) != E_OK)
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| 182 | syslog(LOG_NOTICE, "[LOOP] drop error: %s", itron_strerror(error));
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| 183 | return error;
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| 184 | }
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| 185 |
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| 186 | /*
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| 187 | * ãã¼ã«ã«ã«ã¼ãããã¯ã¤ã³ã¿ãã§ã¼ã¹ã»åºåã¿ã¹ã¯
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| 188 | */
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| 189 |
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| 190 | void
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| 191 | if_loop_output_task (intptr_t exinf)
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| 192 | {
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| 193 | T_NET_BUF *output;
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| 194 | ER error;
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| 195 | ID tskid;
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| 196 |
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| 197 | get_tid(&tskid);
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| 198 | syslog(LOG_NOTICE, "[LOOP OUTPUT:%d] started.", tskid);
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| 199 | while (true) {
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| 200 | if (rcv_dtq(DTQ_LOOP_OUTPUT, (intptr_t*)&output) == E_OK) {
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| 201 | NET_COUNT_LOOP(net_count_loop.in_octets, output->len);
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| 202 | NET_COUNT_LOOP(net_count_loop.in_packets, 1);
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| 203 | if ((error = snd_dtq(DTQ_LOOP_INPUT, output)) != E_OK)
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| 204 | syslog(LOG_NOTICE, "[LOOP OUTPUT] drop error: %s", itron_strerror(error));
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| 205 | }
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| 206 | }
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| 207 | }
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| 208 |
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| 209 | /*
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| 210 | * ãã¼ã«ã«ã«ã¼ãããã¯ã¤ã³ã¿ãã§ã¼ã¹ã»å
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| 211 | ¥åã¿ã¹ã¯
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| 212 | */
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| 213 |
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| 214 | void
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| 215 | if_loop_input_task (intptr_t exinf)
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| 216 | {
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| 217 | T_NET_BUF *input;
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| 218 | ID tskid;
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| 219 |
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| 220 | get_tid(&tskid);
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| 221 | syslog(LOG_NOTICE, "[LOOP INPUT:%d] started.", tskid);
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| 222 | while (true) {
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| 223 | if (rcv_dtq(DTQ_LOOP_INPUT, (intptr_t)&input) == E_OK) {
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| 224 | NET_COUNT_LOOP(net_count_loop.in_octets, input->len);
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| 225 | NET_COUNT_LOOP(net_count_loop.in_packets, 1);
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| 226 |
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| 227 | #if defined(_IP4_CFG)
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| 228 |
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| 229 | /* IPv4 å
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| 230 | ¥åé¢æ°ãå¼ã³åºã */
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| 231 | if (IP4_VHL_V(GET_IP4_HDR(input)->vhl) == IPV4_VERSION)
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| 232 | ip_input(input);
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| 233 |
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| 234 | #endif /* of #if defined(_IP4_CFG) */
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| 235 |
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| 236 | #if defined(_IP6_CFG)
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| 237 |
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| 238 | /* IPv6 å
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| 239 | ¥åé¢æ°ãå¼ã³åºã */
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| 240 | if (IP6_VCF_V(ntohl(GET_IP6_HDR(input)->vcf)) == IPV6_VERSION)
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| 241 | ip6_input(input);
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| 242 |
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| 243 | #endif /* of #if defined(_IP6_CFG) */
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| 244 |
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| 245 | }
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| 246 | }
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| 247 | }
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| 248 |
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| 249 | #endif /* of #ifdef SUPPORT_LOOP */
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