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: ppp_modem.c 317 2017-08-03 13:14:26Z coas-nagasima $
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44 | */
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45 |
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46 | /*
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47 | * PPP ã¢ãã å¶å¾¡
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48 | */
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49 |
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50 | #include <string.h>
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51 |
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52 | #include <t_services.h>
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53 | #include "kernel_id.h"
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54 |
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55 | #include <tinet_defs.h>
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56 | #include <tinet_config.h>
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57 |
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58 | #include <net/if.h>
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59 | #include <net/if_ppp.h>
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60 | #include <net/net.h>
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61 | #include <net/net_endian.h>
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62 | #include <net/net_buf.h>
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63 | #include <net/net_count.h>
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64 | #include <net/ppp.h>
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65 | #include <net/ppp_var.h>
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66 | #include <net/ppp_fsm.h>
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67 | #include <net/ppp_hdlc.h>
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68 | #include <net/ppp_modem.h>
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69 | #include <net/ppp_lcp.h>
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70 |
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71 | #ifdef SUPPORT_PPP
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72 |
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73 | /*
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74 | * å
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75 | ¨åå¤æ°
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76 | */
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77 |
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78 | uint8_t modem_state = PPP_MODEM_DOWN; /* ã¢ãã ã®ç¶æ
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79 | */
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80 |
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81 | /*
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82 | * ã¢ãã å
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83 | ¥åæåå
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84 | */
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85 |
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86 | #define MODEM_RCODE_OK 0
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87 | #define MODEM_RCODE_CONNECT 1
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88 | #define MODEM_RCODE_RING 2
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89 | #define MODEM_RCODE_NO_CARRIER 3
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90 | #define MODEM_RCODE_ERROR 4
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91 | #define MODEM_RCODE_NO_DIALTONE 5
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92 | #define MODEM_RCODE_BUSY 6
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93 | #define MODEM_RCODE_DELAYED 7
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94 |
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95 | /*
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96 | * å¤æ°
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97 | */
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98 |
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99 | static uint8_t *modem_rcode[] = {
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100 | "OK",
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101 | "CONNECT",
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102 | "RING",
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103 | "NO CARRIER",
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104 | "ERROR",
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105 | "NO DIALTONE",
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106 | "BUSY",
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107 | "DELAYED"
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108 | };
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109 |
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110 | static int_t dial_retry;
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111 |
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112 | /*
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113 | * é¢æ°
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114 | */
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115 |
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116 | static void do_dial (void);
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117 | static void modem_putstr (uint8_t *str);
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118 | static void modem_wait (uint8_t *line);
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119 | static void modem_putline (uint8_t *line);
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120 |
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121 | /*
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122 | * modem_getline -- ã¢ãã è¡å
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123 | ¥å
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124 | */
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125 |
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126 | T_NET_BUF *
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127 | modem_getline (T_NET_BUF *nbuf, uint16_t size)
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128 | {
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129 | uint8_t *buf;
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130 |
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131 | buf = nbuf->buf;
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132 | size --; /* '\0' ã®å */
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133 | while (size > 0 && (*buf = HDLC_raw_getoctet()) != '\r') {
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134 | buf ++;
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135 | size --;
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136 | }
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137 | *buf = '\0';
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138 | HDLC_raw_getoctet(); /* \n ãèªã¿é£ã°ãã*/
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139 | nbuf->len = buf - nbuf->buf;
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140 | return nbuf;
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141 | }
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142 |
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143 | /*
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144 | * ã¢ãã å¶å¾¡
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145 | *
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146 | * æ»ãå¤: ã¢ãã ããã®ãªã¶ã«ãã³ã¼ã
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147 | */
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148 |
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149 | int_t
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150 | modem_cntl (T_NET_BUF *input)
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151 | {
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152 | int_t code;
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153 |
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154 | code = sizeof(modem_rcode) / sizeof(uint8_t*) - 1;
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155 | while (strcmp(modem_rcode[code], input->buf) != 0) {
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156 | if (code == 0)
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157 | return modem_state;
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158 | code --;
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159 | }
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160 |
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161 | switch (modem_state) {
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162 |
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163 | case PPP_MODEM_UP:
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164 | if (code == MODEM_RCODE_RING)
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165 | modem_state = PPP_MODEM_RING;
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166 | break;
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167 |
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168 | case PPP_MODEM_DIAL:
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169 | if (code == MODEM_RCODE_CONNECT) {
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170 | syslog(LOG_NOTICE, "[MODEM] up.");
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171 | modem_state = PPP_MODEM_CONNECT;
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172 | lcp_open(PPP_OPEN_ACTIVE);
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173 | sig_sem(SEM_MODEM_READY);
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174 | }
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175 | else {
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176 | syslog(LOG_NOTICE, "[MODEM] dial failed '%s'.", modem_rcode[code]);
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177 | if (-- dial_retry == 0) {
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178 | syslog(LOG_WARNING, "[MODEM] dial failed %d times.", MODEM_CFG_RETRY_CNT);
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179 | modem_state = PPP_MODEM_UP;
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180 | }
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181 | else {
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182 | syscall(dly_tsk(MODEM_CFG_RETRY_WAIT));
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183 | do_dial();
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184 | }
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185 | }
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186 | break;
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187 |
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188 | case PPP_MODEM_RING:
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189 | if (code == MODEM_RCODE_CONNECT) {
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190 | syslog(LOG_NOTICE, "[MODEM] up.");
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191 | modem_state = PPP_MODEM_CONNECT;
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192 | lcp_open(PPP_OPEN_PASSIVE);
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193 | }
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194 | else
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195 | modem_state = PPP_MODEM_UP;
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196 | break;
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197 |
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198 | default:
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199 | if (code == MODEM_RCODE_NO_CARRIER) {
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200 | if (lcp_fsm.state == PPP_FSM_OPENED)
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201 | lcp_close();
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202 | syslog(LOG_NOTICE, "[MODEM] down.");
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203 | modem_state = PPP_MODEM_UP;
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204 | }
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205 | break;
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206 |
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207 | }
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208 |
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209 | return code;
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210 | }
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211 |
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212 | /*
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213 | * init_modem -- ã¢ãã ãåæåããã
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214 | */
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215 |
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216 | void
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217 | init_modem (void)
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218 | {
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219 | modem_putline("AT");
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220 |
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221 | #ifdef MODEM_CFG_INIT
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222 |
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223 | modem_putline(MODEM_CFG_INIT);
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224 |
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225 | #endif /* of #ifdef MODEM_CFG_INIT */
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226 |
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227 | modem_state = PPP_MODEM_UP;
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228 | }
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229 |
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230 | /*
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231 | * wait_modem -- æ¥ç¶å®äºã¾ã§å¾
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232 | ã¤ã
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233 | *
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234 | * æ»ãå¤: æ¥ç¶ã«å¤±æããã E_OBJ ãè¿ãã
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235 | */
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236 |
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237 | ER
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238 | wait_modem (void)
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239 | {
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240 | ER error = E_OK;
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241 |
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242 | if (modem_state == PPP_MODEM_UP) {
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243 | dial();
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244 | }
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245 |
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246 | if (modem_state != PPP_MODEM_CONNECT) {
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247 | /* æ¥ç¶å®äºã¾ã§å¾
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248 | ã¤ã*/
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249 | wai_sem(SEM_MODEM_READY);
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250 | if (modem_state != PPP_MODEM_CONNECT)
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251 | error = E_OBJ;
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252 | }
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253 |
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254 | return error;
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255 | }
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256 |
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257 | /*
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258 | * dial -- ãã¤ã¤ã«ããããªãã©ã¤åæ°ãã»ããããã
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259 | */
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260 |
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261 | void
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262 | dial (void)
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263 | {
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264 | do_dial();
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265 | dial_retry = MODEM_CFG_RETRY_CNT;
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266 | modem_state = PPP_MODEM_DIAL;
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267 | }
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268 |
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269 | /*
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270 | * do_dial -- ãã¤ã¤ã«ãããdial() ã®ä¸è«ãé¢æ°
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271 | */
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272 |
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273 | static void
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274 | do_dial (void)
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275 | {
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276 | syslog(LOG_NOTICE, "[MODEM] dial: %s.", MODEM_CFG_PHONE_NUMBER);
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277 | modem_putstr(MODEM_CFG_DIAL);
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278 | modem_putstr(MODEM_CFG_PHONE_NUMBER);
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279 | modem_putstr("\r");
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280 | }
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281 |
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282 | /*
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283 | * modem_putstr -- ã¢ãã æåååºå
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284 | */
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285 |
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286 | static void
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287 | modem_putstr (uint8_t *str)
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288 | {
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289 | while (*str)
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290 | HDLC_raw_putoctet(*str ++);
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291 | }
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292 |
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293 | /*
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294 | * modem_wait -- ã¢ãã ããæååãå¾
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295 | ã¤
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296 | */
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297 |
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298 | static void
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299 | modem_wait (uint8_t *line)
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300 | {
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301 | int_t ch, state, len = strlen(line);
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302 |
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303 | state = len;
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304 | while (state != 0) {
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305 | ch = HDLC_raw_getoctet();
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306 | if (ch != line[len - state])
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307 | state = len;
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308 | if (ch == line[len - state])
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309 | state --;
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310 | }
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311 | }
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312 |
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313 | /*
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314 | * modem_putline -- ã¢ãã è¡åºå
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315 | */
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316 |
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317 | static void
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318 | modem_putline (uint8_t *line)
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319 | {
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320 | modem_putstr(line);
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321 | modem_putstr("\r");
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322 | modem_wait("OK\r\n");
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323 | }
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324 |
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325 | #endif /* fo #ifdef SUPPORT_PPP */
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