[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: net_subr.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, 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 |
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| 79 | /*
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| 80 | * ãããã¯ã¼ã¯æ±ç¨ãµãã¼ãã«ã¼ãã³
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| 81 | */
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| 82 |
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| 83 | #ifdef TARGET_KERNEL_ASP
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| 84 |
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| 85 | #include <kernel.h>
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| 86 | #include <sil.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/net.h>
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| 103 |
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| 104 | /*
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| 105 | * å¤æ°
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| 106 | */
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| 107 |
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| 108 | static uint32_t next = ULONG_C(1);
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| 109 |
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| 110 | /*
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| 111 | * net_rand -- ä¹±æ°ãè¿ãã
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| 112 | */
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| 113 |
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| 114 | uint32_t
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| 115 | net_rand (void)
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| 116 | {
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| 117 | next = (next * 1103515245 + 12345) % (ULONG_C(0x7fffffff) + 1);
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| 118 | return next;
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| 119 | }
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| 120 |
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| 121 | /*
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| 122 | * srand -- ä¹±æ°ãåæåããã
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| 123 | */
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| 124 |
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| 125 | void
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| 126 | net_srand (uint32_t seed)
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| 127 | {
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| 128 | next += seed;
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| 129 | }
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| 130 |
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| 131 | /*
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| 132 | * convert_hexdigit -- 16é²æ°âæååå¤æ
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| 133 | */
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| 134 |
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| 135 | int_t
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| 136 | convert_hexdigit (char *buf, uint_t val, int_t radix, int_t width, char padchar)
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| 137 | {
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| 138 | static const char radhex[] = "0123456789abcdef";
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| 139 |
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| 140 | char digits[11], *start;
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| 141 | int_t ix, pad;
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| 142 |
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| 143 | ix = 0;
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| 144 | start = buf;
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| 145 | do {
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| 146 | digits[ix ++] = radhex[(val % radix) & 0x0f];
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| 147 | val /= radix;
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| 148 | } while (val != 0);
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| 149 | for (pad = ix; pad < width; pad ++)
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| 150 | *buf ++ = padchar;
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| 151 | while (ix -- > 0)
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| 152 | *buf ++ = digits[ix];
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| 153 | *buf = '\0';
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| 154 | return (int_t)(buf - start);
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| 155 | }
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| 156 |
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| 157 | #ifdef SUPPORT_ETHER
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| 158 |
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| 159 | /*
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| 160 | * mac2str -- MAC ã¢ãã¬ã¹ãæååã«å¤æããã
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| 161 | */
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| 162 |
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| 163 | char *
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| 164 | mac2str (char *buf, uint8_t *macaddr)
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| 165 | {
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| 166 | static char addr_sbuf[NUM_MACADDR_STR_BUFF][sizeof("00:00:00:00:00:00")];
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| 167 | static int_t bix = NUM_MACADDR_STR_BUFF;
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| 168 |
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| 169 | char *start;
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| 170 |
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| 171 | if (buf == NULL) {
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| 172 | syscall(wai_sem(SEM_MAC2STR_BUFF_LOCK));
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| 173 | buf = addr_sbuf[-- bix];
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| 174 | if (bix <= 0)
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| 175 | bix = NUM_MACADDR_STR_BUFF;
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| 176 | syscall(sig_sem(SEM_MAC2STR_BUFF_LOCK));
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| 177 | }
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| 178 |
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| 179 | start = buf;
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| 180 | buf += convert_hexdigit(buf, (uint_t)(*macaddr ++), 16, 2, '0');
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| 181 | *(buf ++) = ':';
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| 182 | buf += convert_hexdigit(buf, (uint_t)(*macaddr ++), 16, 2, '0');
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| 183 | *(buf ++) = ':';
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| 184 | buf += convert_hexdigit(buf, (uint_t)(*macaddr ++), 16, 2, '0');
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| 185 | *(buf ++) = ':';
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| 186 | buf += convert_hexdigit(buf, (uint_t)(*macaddr ++), 16, 2, '0');
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| 187 | *(buf ++) = ':';
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| 188 | buf += convert_hexdigit(buf, (uint_t)(*macaddr ++), 16, 2, '0');
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| 189 | *(buf ++) = ':';
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| 190 | buf += convert_hexdigit(buf, (uint_t)(*macaddr ++), 16, 2, '0');
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| 191 | *buf = '\0';
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| 192 | return start;
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| 193 | }
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| 194 |
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| 195 | #endif /* of #ifdef SUPPORT_ETHER */
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| 196 |
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| 197 | #if _NET_CFG_BYTE_ORDER == _NET_CFG_LITTLE_ENDIAN
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| 198 |
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| 199 | /*
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| 200 | * rev_memcpy_word -- å転ã¡ã¢ãªã³ãã¼ï¼4 ãã¤ãï¼
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| 201 | *
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| 202 | * ãã¤ãåä½ã«ã¢ã¯ã»ã¹ããäºã«ããã
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| 203 | * å¢çã¸ã®ã¢ã©ã¤ã³ã®åé¡ã解決ããã
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| 204 | */
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| 205 |
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| 206 | void
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| 207 | rev_memcpy_word (uint8_t *dst, uint8_t *src)
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| 208 | {
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| 209 | *(dst ) = *(src + 3);
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| 210 | *(dst + 1) = *(src + 2);
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| 211 | *(dst + 2) = *(src + 1);
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| 212 | *(dst + 3) = *(src );
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| 213 | }
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| 214 |
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| 215 | /*
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| 216 | * rev_memcmp_word -- å転ã¡ã¢ãªæ¯è¼ï¼4 ãã¤ãï¼
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| 217 | *
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| 218 | * ãã¤ãåä½ã«ã¢ã¯ã»ã¹ããäºã«ããã
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| 219 | * å¢çã¸ã®ã¢ã©ã¤ã³ã®åé¡ã解決ããã
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| 220 | */
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| 221 |
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| 222 | int_t
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| 223 | rev_memcmp_word (uint8_t *data1, uint8_t *data2)
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| 224 | {
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| 225 | int_t ix, diff;
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| 226 |
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| 227 | for (ix = 4; ix -- > 0; ) {
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| 228 | diff = *(data1 + ix) - *(data2 + (3 - ix));
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| 229 | if (diff != 0)
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| 230 | return diff;
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| 231 | }
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| 232 | return 0;
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| 233 | }
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| 234 |
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| 235 | #endif /* of #if _NET_CFG_BYTE_ORDER == _NET_CFG_LITTLE_ENDIAN */
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