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: ppp.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) 1989 Carnegie Mellon University.
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48 | * All rights reserved.
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49 | *
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50 | * Redistribution and use in source and binary forms are permitted
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51 | * provided that the above copyright notice and this paragraph are
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52 | * duplicated in all such forms and that any documentation,
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53 | * advertising materials, and other materials related to such
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54 | * distribution and use acknowledge that the software was developed
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55 | * by Carnegie Mellon University. The name of the
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56 | * University may not be used to endorse or promote products derived
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57 | * from this software without specific prior written permission.
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58 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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59 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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60 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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61 | */
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62 |
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63 | /*
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64 | * Written by Toshiharu OHNO (tony-o@iij.ad.jp)
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65 | *
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66 | * Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd.
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67 | *
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68 | * Redistribution and use in source and binary forms are permitted
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69 | * provided that the above copyright notice and this paragraph are
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70 | * duplicated in all such forms and that any documentation,
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71 | * advertising materials, and other materials related to such
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72 | * distribution and use acknowledge that the software was developed
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73 | * by the Internet Initiative Japan. The name of the
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74 | * IIJ may not be used to endorse or promote products derived
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75 | * from this software without specific prior written permission.
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76 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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77 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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78 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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79 | */
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80 |
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81 | /*
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82 | * PPP å¦çã¿ã¹ã¯ã®æ¬ä½
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83 | */
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84 |
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85 | #include <s_services.h>
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86 | #include <t_services.h>
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87 | #include "kernel_id.h"
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88 |
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89 | #include <tinet_defs.h>
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90 | #include <tinet_config.h>
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91 |
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92 | #include <net/if.h>
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93 | #include <net/if_ppp.h>
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94 | #include <net/net.h>
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95 | #include <net/net_buf.h>
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96 | #include <net/net_timer.h>
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97 | #include <net/net_count.h>
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98 | #include <net/ppp.h>
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99 | #include <net/ppp_var.h>
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100 | #include <net/ppp_hdlc.h>
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101 | #include <net/ppp_fsm.h>
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102 | #include <net/ppp_lcp.h>
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103 | #include <net/ppp_ipcp.h>
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104 | #include <net/ppp_ccp.h>
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105 | #include <net/ppp_upap.h>
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106 | #include <net/ppp_modem.h>
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107 |
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108 | #ifdef SUPPORT_PPP
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109 |
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110 | /*
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111 | * å
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112 | ¨åå¤æ°
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113 | */
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114 |
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115 | uint8_t ppp_phase = PPP_PHASE_INITIALIZE; /* ãªã³ã¯ã®ç¶æ
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116 | */
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117 |
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118 | /*
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119 | * ãããã³ã«è¡¨
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120 | */
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121 |
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122 | T_PPP_PROTENT *protocols[] = {
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123 | &lcp_protent,
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124 | &ipcp_protent,
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125 |
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126 | #ifdef SUPPORT_CCP
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127 | &ccp_protent,
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128 | #endif /* #ifdef SUPPORT_CCP */
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129 |
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130 | #ifdef LCP_CFG_PAP
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131 | &pap_protent,
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132 | #endif /* #ifdef LCP_CFG_PAP */
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133 |
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134 | #ifdef LCP_CFG_CHAP
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135 | &chap_protent,
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136 | #endif /* #ifdef LCP_CFG_CHAP */
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137 |
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138 | NULL
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139 | };
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140 |
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141 | /*
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142 | * å¤æ°
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143 | */
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144 |
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145 | #ifdef PPP_IDLE_TIMEOUT
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146 |
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147 | static bool_t idle = false;
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148 |
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149 | #endif /* of #ifdef PPP_IDLE_TIMEOUT */
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150 |
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151 | /*
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152 | * é¢æ°
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153 | */
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154 |
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155 | static void parse_input (T_NET_BUF *input);
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156 |
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157 | #ifdef PPP_IDLE_TIMEOUT
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158 |
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159 | static void idle_timeout (void *arg);
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160 |
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161 | #endif /* of #ifdef PPP_IDLE_TIMEOUT */
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162 |
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163 | /*
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164 | * PPP å
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165 | ¥åã®è§£æ
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166 | */
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167 |
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168 | static void
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169 | parse_input(T_NET_BUF *input)
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170 | {
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171 | T_PPP_PROTENT *entry;
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172 | int_t ix;
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173 | uint16_t proto;
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174 |
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175 | NET_COUNT_PPP(net_count_ppp.in_octets, input->len);
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176 | NET_COUNT_PPP(net_count_ppp.in_packets, 1);
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177 |
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178 | /* ãã¬ã¼ã é·ããã§ãã¯ãã */
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179 | if (input->len < sizeof(T_PPP_HDR)) { /* FreeBSD ã§ã¯ PPP_HDRLEN 㯠4 */
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180 | syslog(LOG_NOTICE, "[PPP] recv short frame.");
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181 | goto buf_rel;
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182 | }
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183 |
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184 | proto = ntohs(*GET_PPP_HDR(input));
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185 |
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186 | /* ãããã³ã«ã LCP 以å¤ã§ãLCP ããªã¼ãã³ããã¦ããªããã°ã¨ã©ã¼ */
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187 | if (proto != PPP_LCP && lcp_fsm.state != PPP_FSM_OPENED) {
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188 | syslog(LOG_NOTICE, "[PPP] LCP not open.");
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189 | goto buf_rel;
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190 | }
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191 |
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192 | /* ãªã³ã¯ãèªè¨¼ç¶æ
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193 | 以åã¯ãLCPãLQRãPAPãCHAP ã®ã¿åãä»ãã */
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194 | if (ppp_phase <= PPP_PHASE_AUTHENTICATE &&
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195 | !(proto == PPP_LCP || proto == PPP_LQR ||
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196 | proto == PPP_PAP || proto == PPP_CHAP)) {
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197 | syslog(LOG_NOTICE, "[PPP] disc proto: 0x%04x, phase: %d.", proto, ppp_phase);
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198 | goto buf_rel;
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199 | }
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200 |
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201 | /* ä¸ä½ãããã³ã«ã®å
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202 | ¥åé¢æ°ãå¼åºã */
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203 | for (ix = 0; (entry = protocols[ix]) != NULL; ix ++) {
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204 | if (entry->proto == proto && entry->input != NULL) {
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205 | (*entry->input)(input);
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206 | syscall(rel_net_buf(input));
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207 | return;
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208 | }
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209 | if ((entry->proto & ~0x8000) == proto && entry->datainput != NULL) {
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210 | (*entry->datainput)(input);
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211 | return;
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212 | }
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213 | }
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214 |
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215 | syslog(LOG_INFO, "[PPP] unexp proto: 0x%04x.", proto);
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216 | lcp_sprotrej(input);
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217 |
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218 | buf_rel:
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219 | NET_COUNT_PPP(net_count_ppp.in_err_packets, 1);
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220 | syscall(rel_net_buf(input));
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221 | }
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222 |
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223 | /*
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224 | * ppp_output -- PPP ã¤ã³ã¿ãã§ã¼ã¹ã®åºåé¢æ°
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225 | */
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226 |
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227 | ER
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228 | ppp_output (T_NET_BUF *output, TMO tmout)
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229 | {
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230 | ER error = E_OK;
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231 |
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232 | #ifdef PPP_CFG_MODEM
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233 |
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234 | #if 0 /* ä¿ç */
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235 | /* ã¢ãã ã®æ¥ç¶å®äºã¾ã§å¾
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236 | ã¤ã*/
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237 | if ((error = wait_modem()) != E_OK)
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238 | goto buf_ret;
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239 | #endif
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240 |
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241 | #endif /* of #ifdef PPP_CFG_MODEM */
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242 |
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243 | /* IPCP ã®æ¥ç¶å®äºã¾ã§å¾
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244 | ã¤ã*/
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245 | if ((error = wait_ipcp()) != E_OK)
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246 | goto buf_ret;
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247 |
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248 | #ifdef PPP_IDLE_TIMEOUT
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249 | wai_sem(SEM_IDLE_TIMEOUT);
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250 | if (idle) {
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251 | untimeout((FP)idle_timeout, NULL);
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252 | idle = false;
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253 | }
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254 | sig_sem(SEM_IDLE_TIMEOUT);
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255 | #endif /* of #ifdef PPP_IDLE_TIMEOUT */
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256 |
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257 | /* PPP åºåãã¥ã¼ã«æå
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258 | ¥ããã*/
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259 | if ((error = tsnd_dtq(DTQ_PPP_OUTPUT, output, tmout)) != E_OK)
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260 | goto buf_ret;
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261 |
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262 | #ifdef PPP_IDLE_TIMEOUT
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263 | wai_sem(SEM_IDLE_TIMEOUT);
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264 | if (!idle && ppp_phase == PPP_PHASE_NETWORK) {
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265 | timeout((FP)idle_timeout, NULL, PPP_IDLE_TIMEOUT);
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266 | idle = true;
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267 | }
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268 | sig_sem(SEM_IDLE_TIMEOUT);
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269 | #endif /* of #ifdef PPP_IDLE_TIMEOUT */
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270 |
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271 | return error;
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272 |
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273 | buf_ret:
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274 | syscall(rel_net_buf(output));
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275 | NET_COUNT_PPP(net_count_ppp.out_err_packets, 1);
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276 | return error;
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277 | }
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278 |
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279 | /*
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280 | * ppp_cp_output -- CP ãã¬ã¼ã ã®éä¿¡
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281 | */
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282 |
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283 | void
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284 | ppp_cp_output (uint8_t code, uint8_t id, T_NET_BUF *output)
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285 | {
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286 | T_PPP_CP_HDR *cph;
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287 |
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288 | /* CP ããããè¨å®ãã */
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289 | cph = GET_PPP_CP_HDR(output);
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290 | cph->code = code;
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291 | cph->id = id;
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292 | cph->len = htons(output->len - sizeof(T_PPP_HDR));
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293 |
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294 | /* PPP åºåãã¥ã¼ã«æå
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295 | ¥ããã*/
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296 | if (snd_dtq(DTQ_PPP_OUTPUT, output) != E_OK) {
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297 | syscall(rel_net_buf(output));
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298 | NET_COUNT_PPP(net_count_ppp.out_err_packets, 1);
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299 | }
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300 | }
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301 |
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302 | /*
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303 | * PPP å
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304 | ¥åã¿ã¹ã¯
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305 | */
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306 |
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307 | void
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308 | ppp_input_task(intptr_t exinf)
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309 | {
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310 | T_NET_BUF *input;
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311 | T_PPP_PROTENT *proto;
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312 | ID tskid;
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313 | int_t ix;
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314 |
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315 | /* ãã¼ããåæè¨å®ãã */
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316 | syscall(serial_opn_por(HDLC_PORTID));
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317 | syscall(serial_ctl_por(HDLC_PORTID, IOCTL_FCSND | IOCTL_FCRCV));
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318 |
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319 | get_tid(&tskid);
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320 |
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321 | #ifdef PPP_CFG_MODEM
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322 |
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323 | init_modem();
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324 | syslog(LOG_NOTICE, "[PPP INPUT:%d] started with modem on port %d.", tskid, HDLC_PORTID);
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325 |
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326 | #else /* of #ifdef PPP_CFG_MODEM */
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327 |
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328 | syslog(LOG_NOTICE, "[PPP INPUT:%d] started on port %d.", tskid, HDLC_PORTID);
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329 |
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330 | #endif /* of #ifdef PPP_CFG_MODEM */
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331 |
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332 | /* ãããã¯ã¼ã¯ã¿ã¤ãã¿ã¹ã¯ãèµ·åãã */
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333 | syscall(act_tsk(NET_TIMER_TASK));
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334 |
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335 | /* ä¸ä½ãããã³ã«ãåæåãã */
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336 | for (ix = 0; (proto = protocols[ix]) != NULL; ix ++)
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337 | if (proto->init != NULL)
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338 | (*proto->init)();
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339 |
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340 | lcp_lowerup();
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341 | lcp_open(PPP_OPEN_PASSIVE);
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342 |
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343 | /* PPP åºåã¿ã¹ã¯ãèµ·åãã */
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344 | syscall(act_tsk(PPP_OUTPUT_TASK));
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345 |
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346 | while (true) {
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347 | if (tget_net_buf(&input, IF_PDU_SIZE, TMO_PPP_GET_NET_BUF) == E_OK) {
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348 | while (HDLC_read(input, IF_PDU_SIZE) != E_OK)
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349 | ;
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350 | if (input->len > 0) {
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351 |
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352 | #ifdef PPP_IDLE_TIMEOUT
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353 | wai_sem(SEM_IDLE_TIMEOUT);
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354 | if (idle && ntohs(*GET_PPP_HDR(input)) != PPP_LCP) {
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355 | untimeout((FP)idle_timeout, NULL);
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356 | idle = false;
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357 | }
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358 | sig_sem(SEM_IDLE_TIMEOUT);
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359 | #endif /* of #ifdef PPP_IDLE_TIMEOUT */
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360 |
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361 | parse_input(input);
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362 | }
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363 | else
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364 | syscall(rel_net_buf(input));
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365 |
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366 | #ifdef PPP_IDLE_TIMEOUT
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367 | wai_sem(SEM_IDLE_TIMEOUT);
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368 | if (!idle && ppp_phase == PPP_PHASE_NETWORK) {
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369 | timeout((FP)idle_timeout, NULL, PPP_IDLE_TIMEOUT);
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370 | idle = true;
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371 | }
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372 | else if (idle && ppp_phase != PPP_PHASE_NETWORK) {
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373 | untimeout((FP)idle_timeout, NULL);
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374 | idle = false;
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375 | }
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376 | sig_sem(SEM_IDLE_TIMEOUT);
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377 | #endif /* of #ifdef PPP_IDLE_TIMEOUT */
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378 |
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379 | }
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380 | else {
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381 | HDLC_dummy_read();
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382 | NET_COUNT_PPP(net_count_ppp.in_err_packets, 1);
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383 | NET_COUNT_PPP(net_count_ppp_no_bufs, 1);
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384 | }
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385 | }
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386 | }
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387 |
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388 | /*
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389 | * PPP åºåã¿ã¹ã¯
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390 | */
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391 |
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392 | void
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393 | ppp_output_task(intptr_t exinf)
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394 | {
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395 | T_NET_BUF *output;
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396 | ID tskid;
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397 |
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398 | get_tid(&tskid);
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399 | syslog(LOG_NOTICE, "[PPP OUTPUT:%d] started.", tskid);
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400 |
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401 | while (true) {
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402 | while (rcv_dtq(DTQ_PPP_OUTPUT, (intptr_t*)&output) == E_OK) {
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403 | NET_COUNT_PPP(net_count_ppp.out_octets, output->len);
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404 | NET_COUNT_PPP(net_count_ppp.out_packets, 1);
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405 | syscall(HDLC_write(output));
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406 | syscall(rel_net_buf(output));
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407 | }
|
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408 | }
|
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409 | }
|
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410 |
|
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411 | #ifdef PPP_IDLE_TIMEOUT
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412 |
|
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413 | /*
|
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414 | * ã¢ã¤ãã«ã¿ã¤ã ã¢ã¦ãå¦ç
|
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415 | */
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416 |
|
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417 | static void
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418 | idle_timeout (void *arg)
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419 | {
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420 | syslog(LOG_NOTICE, "[PPP] idel %d [s], disconnecting.", (uint16_t)(PPP_IDLE_TIMEOUT / NET_TIMER_HZ));
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421 | lcp_close();
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422 | }
|
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423 |
|
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424 | #endif /* of #ifdef PPP_IDLE_TIMEOUT */
|
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425 |
|
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426 | #endif /* fo #ifdef SUPPORT_PPP */
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