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 | * @(#) $Id$
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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 | #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 "kernel_cfg.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_endian.h>
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107 | #include <net/net_buf.h>
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108 | #include <net/net_timer.h>
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109 |
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110 | #include <netinet/in.h>
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111 | #include <netinet/in_var.h>
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112 | #include <netinet/ip.h>
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113 | #include <netinet/ip_var.h>
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114 |
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115 | #include <net/if_var.h>
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116 |
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117 | #ifdef SUPPORT_IGMP
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118 | #include <netinet/udp_var.h>
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119 | #include <netinet/ip_igmp.h>
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120 | #endif /* of #ifdef SUPPORT_IGMP */
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121 |
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122 | #if defined(_IP4_CFG)
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123 |
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124 | #if NUM_IN4_REDIRECT_ROUTE_ENTRY > 0
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125 |
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126 | /*
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127 | * in_rtinit -- ã«ã¼ãã£ã³ã°è¡¨ãåæåããã
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128 | */
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129 |
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130 | void
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131 | in_rtinit (void)
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132 | {
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133 | int_t ix;
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134 |
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135 | for (ix = 0; ix < NUM_IN4_STATIC_ROUTE_ENTRY; ix ++)
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136 | routing4_tbl[ix].flags = IN_RTF_DEFINED;
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137 |
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138 | for ( ; ix < NUM_IN4_ROUTE_ENTRY; ix ++)
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139 | routing4_tbl[ix].flags = 0;
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140 | }
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141 |
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142 | /*
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143 | * in_rtnewentry -- æ°ããã¨ã³ããªãç²å¾ããã
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144 | */
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145 |
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146 | T_IN4_RTENTRY *
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147 | in_rtnewentry (uint8_t flags, uint32_t tmo)
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148 | {
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149 | SYSTIM now;
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150 | T_IN4_RTENTRY *rt, *frt = NULL;
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151 | int_t ix;
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152 |
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153 | /* 空ãã¨ã³ããªãæ¢ãã*/
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154 | for (ix = NUM_IN4_STATIC_ROUTE_ENTRY; ix < NUM_IN4_ROUTE_ENTRY; ix ++) {
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155 | rt = &routing4_tbl[ix];
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156 | if ((routing4_tbl[ix].flags & IN_RTF_DEFINED) == 0) {
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157 | frt = rt;
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158 | break;
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159 | }
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160 | }
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161 |
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162 | /* expire ã®åä½ã¯ [s]ã*/
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163 | syscall(get_tim(&now));
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164 | now /= SYSTIM_HZ;
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165 |
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166 | if (frt == NULL) {
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167 | /* 空ãããªããã°ãæå¹æéããã£ã¨ãçãã¨ã³ããªã空ãã«ããã*/
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168 | T_IN4_RTENTRY *srt = NULL;
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169 | int_t diff, sdiff = INT_MAX;
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170 |
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171 | syscall(wai_sem(SEM_IN4_ROUTING_TBL));
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172 | for (ix = NUM_IN4_STATIC_ROUTE_ENTRY; ix < NUM_IN4_ROUTE_ENTRY; ix ++) {
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173 | rt = &routing4_tbl[ix];
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174 | diff = (int_t)(rt->expire - now);
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175 | if (diff <= 0) { /* rt->expire <= now */
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176 | /* æ¢ã«ãæå¹æéãéãã¦ããã*/
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177 | frt = rt;
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178 | break;
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179 | }
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180 | else if (diff < sdiff) {
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181 | srt = rt;
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182 | sdiff = diff;
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183 | }
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184 | }
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185 | if (frt == NULL)
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186 | frt = srt;
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187 | frt->flags = 0;
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188 | syscall(sig_sem(SEM_IN4_ROUTING_TBL));
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189 | }
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190 |
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191 | frt->flags = (uint8_t)(flags | IN_RTF_DEFINED);
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192 | frt->expire = now + tmo / SYSTIM_HZ;
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193 | return frt;
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194 | }
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195 |
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196 | /*
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197 | * in_rttimer -- ã«ã¼ãã£ã³ã°è¡¨ã®ç®¡çã¿ã¤ãã¼
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198 | */
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199 |
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200 | void
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201 | in_rttimer (void)
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202 | {
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203 | SYSTIM now;
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204 | int_t ix;
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205 |
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206 | /* expire ã®åä½ã¯ [s]ã*/
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207 | syscall(get_tim(&now));
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208 | now /= SYSTIM_HZ;
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209 |
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210 | syscall(wai_sem(SEM_IN4_ROUTING_TBL));
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211 | for (ix = NUM_IN4_STATIC_ROUTE_ENTRY; ix < NUM_IN4_ROUTE_ENTRY; ix ++)
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212 | if ((routing4_tbl[ix].flags & IN_RTF_DEFINED) &&
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213 | (int_t)(routing4_tbl[ix].expire - now) <= 0)
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214 | routing4_tbl[ix].flags = 0;
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215 | syscall(sig_sem(SEM_IN4_ROUTING_TBL));
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216 | }
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217 |
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218 | #endif /* of #if NUM_IN4_REDIRECT_ROUTE_ENTRY > 0 */
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219 |
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220 | /*
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221 | * in4_get_maxnum_ifaddr -- ã¤ã³ã¿ãã§ã¼ã¹ã«è¨å®å¯è½ãªæ大ã¢ãã¬ã¹æ°ãè¿ãã
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222 | */
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223 |
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224 | uint_t
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225 | in4_get_maxnum_ifaddr (void)
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226 | {
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227 | return 1;
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228 | }
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229 |
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230 | /*
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231 | * in4_get_ifaddr -- ã¤ã³ã¿ãã§ã¼ã¹ã«è¨å®ããã¦ããã¢ãã¬ã¹ãè¿ãã
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232 | */
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233 |
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234 | const T_IN4_ADDR *
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235 | in4_get_ifaddr (int_t index)
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236 | {
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237 | T_IFNET *ifp = IF_GET_IFNET();
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238 |
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239 | return &ifp->in4_ifaddr.addr;
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240 | }
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241 |
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242 | /*
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243 | * in4_set_header -- IPv4 ããããè¨å®ããã
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244 | */
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245 |
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246 | ER
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247 | in4_set_header (T_NET_BUF *nbuf, uint_t len,
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248 | T_IN4_ADDR *dstaddr, T_IN4_ADDR *srcaddr, uint8_t proto, uint8_t ttl)
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249 | {
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250 | T_IP4_HDR *ip4h = GET_IP4_HDR(nbuf);
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251 | T_IFNET *ifp = IF_GET_IFNET();
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252 |
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253 | /* IP ããããè¨å®ããã*/
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254 | ip4h->vhl = IP4_MAKE_VHL(IPV4_VERSION, IP4_HDR_SIZE >> 2);
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255 | ip4h->len = htons(IP4_HDR_SIZE + len);
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256 | ip4h->proto = proto;
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257 | ip4h->ttl = ttl;
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258 | ip4h->type = 0;
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259 | ip4h->id = ip4h->flg_off = ip4h->sum = 0;
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260 |
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261 | /* IP ã¢ãã¬ã¹ãè¨å®ããã*/
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262 | ip4h->dst = htonl(*dstaddr);
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263 |
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264 | if (srcaddr == NULL || *srcaddr == IPV4_ADDRANY)
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265 | ip4h->src = htonl(ifp->in4_ifaddr.addr);
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266 | else
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267 | ip4h->src = htonl(*srcaddr);
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268 |
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269 | return E_OK;
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270 | }
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271 |
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272 | /*
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273 | * in4_get_datagram -- IPv4 ãã¼ã¿ã°ã©ã ãç²å¾ããããããè¨å®ããã
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274 | */
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275 |
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276 | ER
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277 | in4_get_datagram (T_NET_BUF **nbuf, uint_t len, uint_t maxlen,
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278 | T_IN4_ADDR *dstaddr, T_IN4_ADDR *srcaddr,
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279 | uint8_t proto, uint8_t ttl, ATR nbatr, TMO tmout)
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280 | {
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281 | ER error;
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282 | uint_t align;
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283 |
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284 | /* ãã¼ã¿é·ã 4 ãªã¯ãããå¢çã«èª¿æ´ããã*/
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285 | align = (len + 3) >> 2 << 2;
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286 |
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287 | /* ãããã¯ã¼ã¯ãããã¡ãç²å¾ããã*/
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288 | if ((error = tget_net_buf_ex(nbuf, (uint_t)(IF_IP4_HDR_SIZE + align),
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289 | (uint_t)(IF_IP4_HDR_SIZE + maxlen), nbatr, tmout)) != E_OK)
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290 | return error;
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291 |
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292 | /*
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293 | * ãã大ããªãµã¤ãºã®ãããã¯ã¼ã¯ãããã¡ãç²å¾ããå ´åã®ã¿é·ãã調æ´ããã
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294 | * ããå°ããªãµã¤ãºã®ãããã¯ã¼ã¯ãããã¡ã®ç²å¾ã¯ãéä¿¡ã¦ã£ã³ããããã¡ã®
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295 | * çã³ãã¼æ©è½ã§ä½¿ç¨ãããå®éã«éä¿¡ããã¾ã§ããã¼ã¿ãµã¤ãºã¯æ±ºå®ã§ããªãã
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296 | */
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297 | if ((nbatr & NBA_SEARCH_ASCENT) != 0)
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298 | (*nbuf)->len = (uint16_t)(IF_IP4_HDR_SIZE + len);
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299 |
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300 | /* IP ããããè¨å®ããã*/
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301 | if ((error = in4_set_header(*nbuf, len, dstaddr, srcaddr, proto, ttl)) != E_OK) {
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302 | syscall(rel_net_buf(*nbuf));
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303 | *nbuf = NULL;
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304 | return error;
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305 | }
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306 |
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307 | /* 4 ãªã¯ãããå¢çã¾ã§ããã£ã³ã°ã§åããã*/
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308 | if (align > len)
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309 | memset((GET_IP4_SDU(*nbuf) + len), 0, (size_t)(align - len));
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310 |
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311 | return E_OK;
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312 | }
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313 |
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314 | /*
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315 | * in4_cksum -- IPv4 ã®ãã©ã³ã¹ãã¼ã層ãããã®ãã§ãã¯ãµã ãè¨ç®ããã
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316 | *
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317 | * 注æ: æ»ãå¤ã¯ãããã¯ã¼ã¯ãã¤ããªã¼ã
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318 | */
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319 |
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320 | uint16_t
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321 | in4_cksum (T_NET_BUF *nbuf, uint8_t proto, uint_t off, uint_t len)
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322 | {
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323 | uint32_t sum;
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324 | uint_t align;
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325 |
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326 | /* 4 ãªã¯ãããå¢çã®ãã¼ã¿é· */
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327 | align = (len + 3) >> 2 << 2;
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328 |
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329 | /* 4 ãªã¯ãããå¢çã¾ã§ããã£ã³ã°ã§åããã*/
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330 | if (align > len)
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331 | memset((uint8_t*)nbuf->buf + off + len, 0, (size_t)(align - len));
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332 |
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333 | sum = in_cksum_sum(nbuf->buf + off, align)
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334 | + in_cksum_sum(&GET_IP4_HDR(nbuf)->src, sizeof(T_IN4_ADDR) * 2)
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335 | + len + proto;
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336 | sum = in_cksum_carry(sum);
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337 |
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338 | return (uint16_t)(~htons((uint16_t)sum));
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339 | }
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340 |
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341 | /*
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342 | * in_cksum -- ãã§ãã¯ãµã è¨ç®é¢æ°ãIPv4ãICMPv4 ç¨
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343 | *
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344 | * 注æ: data 㯠4 ãªã¯ãããåä½ã§ããã£ã³ã°ãããã¨ã
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345 | * data ã 2 ãªã¯ãããåä½ã«ã¢ã©ã¤ã³ããã¦ããªãã¨
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346 | * ä¾å¤ãçºçããå¯è½æ§ãããã
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347 | * len 㯠4 ãªã¯ãããåä½ã«ã¢ã©ã¤ã³ããã¦ãããã¨ã
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348 | *
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349 | * æ»ãå¤ã¯ãããã¯ã¼ã¯ãã¤ããªã¼ã
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350 | */
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351 |
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352 | uint16_t
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353 | in_cksum (void *data, uint_t len /*ãªã¯ãããåä½*/)
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354 | {
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355 | uint16_t sum;
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356 |
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357 | sum = (uint16_t)in_cksum_carry(in_cksum_sum(data, len));
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358 | return (uint16_t)(~htons(sum));
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359 | }
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360 |
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361 | /*
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362 | * in4_is_dstaddr_accept -- å®å
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363 | ã¢ãã¬ã¹ã¨ãã¦æ£ããããã§ãã¯ããã
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364 | *
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365 | * 注æ: dstaddr ã¯ã
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366 | * TINET-1.2 ãããããã¯ã¼ã¯ãã¤ããªã¼ãã
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367 | * TINET-1.1 ã¾ã§ã¯ããã¹ããã¤ããªã¼ã
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368 | */
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369 |
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370 | bool_t
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371 | in4_is_dstaddr_accept (T_IN4_ADDR *myaddr, T_IN4_ADDR *dstaddr)
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372 | {
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373 | if (*myaddr == IPV4_ADDRANY)
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374 | return ntohl(*dstaddr) == IF_GET_IFNET()->in4_ifaddr.addr;
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375 | else
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376 | return ntohl(*dstaddr) == *myaddr;
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377 | }
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378 |
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379 | /*
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380 | * inn4_is_dstaddr_accept -- å®å
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381 | ã¢ãã¬ã¹ã¨ãã¦æ£ããããã§ãã¯ããã
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382 | *
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383 | * 注æ: dstaddr ã¯ã
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384 | * TINET-1.2 ãããããã¯ã¼ã¯ãã¤ããªã¼ãã
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385 | * TINET-1.1 ã¾ã§ã¯ããã¹ããã¤ããªã¼ã
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386 | */
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387 |
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388 | bool_t
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389 | inn4_is_dstaddr_accept (T_IN4_ADDR *myaddr, T_NET_BUF *nbuf)
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390 | {
|
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391 | T_IP4_HDR *iph;
|
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392 |
|
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393 | iph = GET_IP4_HDR(nbuf);
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394 | if (*myaddr == IPV4_ADDRANY)
|
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395 | return ntohl(iph->dst) == IF_GET_IFNET()->in4_ifaddr.addr;
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396 | else
|
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397 | return ntohl(iph->dst) == *myaddr;
|
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398 | }
|
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399 |
|
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400 | /*
|
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401 | * in4_addrwithifp -- å®å
|
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402 | ã¢ãã¬ã¹ã«ãµããããéä¿¡å
|
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403 | ã¢ãã¬ã¹ãã
|
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404 | * ãããã¯ã¼ã¯ã¤ã³ã¿ãã§ã¼ã¹ããæ¢ç´¢ããã
|
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405 | * in6_addrwithifp ãã·ãã¥ã¬ã¼ãããã ãã§ã
|
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406 | * ã¨ã©ã¼ãè¿ããã¨ã¯ãªãã
|
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407 | */
|
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408 |
|
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409 | T_IN4_ADDR *
|
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410 | in4_addrwithifp (T_IFNET *ifp, T_IN4_ADDR *src, T_IN4_ADDR *dst)
|
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411 | {
|
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412 | *src = ifp->in4_ifaddr.addr;
|
---|
413 | return src;
|
---|
414 | }
|
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415 |
|
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416 | /*
|
---|
417 | * in4_add_ifaddr -- ã¤ã³ã¿ãã§ã¼ã¹ã« IPv4 ã¢ãã¬ã¹ãè¨å®ããã
|
---|
418 | */
|
---|
419 |
|
---|
420 | ER
|
---|
421 | in4_add_ifaddr (T_IN4_ADDR addr, T_IN4_ADDR mask)
|
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422 | {
|
---|
423 | T_IFNET *ifp = IF_GET_IFNET();
|
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424 |
|
---|
425 | ifp->in4_ifaddr.addr = addr;
|
---|
426 | ifp->in4_ifaddr.mask = mask;
|
---|
427 | return E_OK;
|
---|
428 | }
|
---|
429 |
|
---|
430 | #if NUM_IN4_ROUTE_ENTRY > 0
|
---|
431 |
|
---|
432 | /*
|
---|
433 | * in4_add_route -- çµè·¯è¡¨ã«ã¨ã³ããªãè¨å®ããã
|
---|
434 | */
|
---|
435 |
|
---|
436 | ER
|
---|
437 | in4_add_route (int_t index, T_IN4_ADDR target, T_IN4_ADDR mask, T_IN4_ADDR gateway)
|
---|
438 | {
|
---|
439 |
|
---|
440 | if (0 <= index && index < NUM_IN4_STATIC_ROUTE_ENTRY) {
|
---|
441 | routing4_tbl[index].target = target;
|
---|
442 | routing4_tbl[index].mask = mask;
|
---|
443 | routing4_tbl[index].gateway = gateway;
|
---|
444 | return E_OK;
|
---|
445 | }
|
---|
446 | else
|
---|
447 | return E_PAR;
|
---|
448 | }
|
---|
449 |
|
---|
450 | #endif /* of #if NUM_IN4_ROUTE_ENTRY > 0 */
|
---|
451 |
|
---|
452 | /*
|
---|
453 | * in4_rtalloc -- ã«ã¼ãã£ã³ã°è¡¨ãæ¢ç´¢ããã
|
---|
454 | */
|
---|
455 |
|
---|
456 | T_IN4_ADDR
|
---|
457 | in4_rtalloc (T_IN4_ADDR dst)
|
---|
458 | {
|
---|
459 | int_t ix;
|
---|
460 | #ifdef ETHER_CFG_MULTICAST
|
---|
461 | if(IN4_IS_ADDR_MULTICAST(dst))
|
---|
462 | return dst;
|
---|
463 | #endif /* of #ifdef ETHER_CFG_MULTICAST */
|
---|
464 | for (ix = NUM_IN4_ROUTE_ENTRY; ix --; )
|
---|
465 | if ((routing4_tbl[ix].flags & IN_RTF_DEFINED) &&
|
---|
466 | (dst & routing4_tbl[ix].mask) == routing4_tbl[ix].target) {
|
---|
467 | if (routing4_tbl[ix].gateway == 0)
|
---|
468 | return dst;
|
---|
469 | else {
|
---|
470 | return routing4_tbl[ix].gateway;
|
---|
471 | }
|
---|
472 | }
|
---|
473 | return dst;
|
---|
474 | }
|
---|
475 |
|
---|
476 | #if NUM_IN4_REDIRECT_ROUTE_ENTRY > 0
|
---|
477 |
|
---|
478 | /*
|
---|
479 | * in4_rtredirect -- ã«ã¼ãã£ã³ã°è¡¨ã«ã¨ã³ããªãç»é²ããã
|
---|
480 | *
|
---|
481 | * 注æ: å¼æ° tmo ã®åä½ã¯ [ms]ã
|
---|
482 | */
|
---|
483 |
|
---|
484 | void
|
---|
485 | in4_rtredirect (T_IN4_ADDR gateway, T_IN4_ADDR target, uint8_t flags, uint32_t tmo)
|
---|
486 | {
|
---|
487 | T_IN4_RTENTRY *frt;
|
---|
488 |
|
---|
489 | frt = in_rtnewentry(flags, tmo);
|
---|
490 | frt->gateway = gateway;
|
---|
491 | frt->target = target;
|
---|
492 | frt->mask = 0xffffffff;
|
---|
493 | }
|
---|
494 |
|
---|
495 | #endif /* of #if NUM_IN4_REDIRECT_ROUTE_ENTRY > 0 */
|
---|
496 |
|
---|
497 | /*
|
---|
498 | * in4_timer -- IPv4 å
|
---|
499 | ±éã¿ã¤ãã¼
|
---|
500 | *
|
---|
501 | * 1ç§å¨æã§èµ·åãããã
|
---|
502 | */
|
---|
503 |
|
---|
504 | static void
|
---|
505 | in4_timer (void *ignore)
|
---|
506 | {
|
---|
507 | #if NUM_IN4_REDIRECT_ROUTE_ENTRY > 0
|
---|
508 |
|
---|
509 | in_rttimer();
|
---|
510 |
|
---|
511 | #endif /* of #if NUM_IN4_REDIRECT_ROUTE_ENTRY > 0 */
|
---|
512 |
|
---|
513 | #ifdef IP4_CFG_FRAGMENT
|
---|
514 |
|
---|
515 | ip_frag_timer();
|
---|
516 |
|
---|
517 | #endif /* of #ifdef IP4_CFG_FRAGMENT */
|
---|
518 |
|
---|
519 | timeout(in4_timer, NULL, IN_TIMER_TMO);
|
---|
520 | }
|
---|
521 |
|
---|
522 | /*
|
---|
523 | * in4_init -- IPv4 å
|
---|
524 | ±éæ©è½ãåæåããã
|
---|
525 | */
|
---|
526 |
|
---|
527 | void
|
---|
528 | in4_init (void)
|
---|
529 | {
|
---|
530 | #if NUM_IN4_REDIRECT_ROUTE_ENTRY > 0
|
---|
531 |
|
---|
532 | in_rtinit();
|
---|
533 |
|
---|
534 | #endif /* of #if NUM_IN4_REDIRECT_ROUTE_ENTRY > 0 */
|
---|
535 |
|
---|
536 | #ifdef SUPPORT_IGMP
|
---|
537 | igmp_init();
|
---|
538 | #endif /* of #ifdef SUPPORT_IGMP */
|
---|
539 |
|
---|
540 | timeout(in4_timer, NULL, IN_TIMER_TMO);
|
---|
541 | }
|
---|
542 |
|
---|
543 | #endif /* of #if defined(_IP4_CFG) */
|
---|