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_ipcp.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 | * ipcp.c - PPP IP Control Protocol.
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48 | *
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49 | * Copyright (c) 1989 Carnegie Mellon University.
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50 | * All rights reserved.
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51 | *
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52 | * Redistribution and use in source and binary forms are permitted
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53 | * provided that the above copyright notice and this paragraph are
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54 | * duplicated in all such forms and that any documentation,
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55 | * advertising materials, and other materials related to such
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56 | * distribution and use acknowledge that the software was developed
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57 | * by Carnegie Mellon University. The name of the
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58 | * University may not be used to endorse or promote products derived
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59 | * from this software without specific prior written permission.
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60 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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61 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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62 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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63 | */
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64 |
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65 | /*
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66 | * PPP IP Control Protocol (IPCP) Module
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67 | *
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68 | * Written by Toshiharu OHNO (tony-o@iij.ad.jp)
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69 | *
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70 | * Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd.
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71 | *
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72 | * Redistribution and use in source and binary forms are permitted
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73 | * provided that the above copyright notice and this paragraph are
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74 | * duplicated in all such forms and that any documentation,
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75 | * advertising materials, and other materials related to such
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76 | * distribution and use acknowledge that the software was developed
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77 | * by the Internet Initiative Japan, Inc. The name of the
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78 | * IIJ may not be used to endorse or promote products derived
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79 | * from this software without specific prior written permission.
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80 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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81 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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82 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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83 | *
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84 | * $FreeBSD: src/usr.sbin/ppp/ipcp.c,v 1.90.2.4 2000/08/19 09:30:03 brian Exp $
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85 | *
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86 | * TODO:
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87 | * o Support IPADDRS properly
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88 | * o Validate the length in IpcpDecodeConfig
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89 | */
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90 |
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91 | #include <string.h>
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92 |
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93 | #include <s_services.h>
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94 | #include <t_services.h>
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95 | #include "kernel_id.h"
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96 |
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97 | #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_ppp.h>
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102 | #include <net/net.h>
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103 | #include <net/net_endian.h>
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104 | #include <net/net_buf.h>
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105 | #include <net/net_count.h>
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106 | #include <net/ppp.h>
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107 | #include <net/ppp_var.h>
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108 | #include <net/ppp_fsm.h>
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109 | #include <net/ppp_lcp.h>
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110 | #include <net/ppp_ipcp.h>
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111 | #include <net/ppp_modem.h>
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112 |
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113 | #include <netinet/in.h>
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114 | #include <netinet/in_var.h>
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115 | #include <netinet/ip.h>
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116 | #include <netinet/tcp.h>
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117 | #include <netinet/tcp_var.h>
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118 | #include <netinet/tcp_timer.h>
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119 | #include <netinet/udp_var.h>
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120 |
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121 | #include <net/if_var.h>
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122 |
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123 | #ifdef SUPPORT_PPP
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124 |
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125 | /*
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126 | * é¢æ°
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127 | */
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128 |
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129 | static void ipcp_init (void);
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130 | static void ipcp_input (T_NET_BUF *input);
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131 | static void ipcp_protrej (void);
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132 | static void ipcp_lowerup (void);
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133 | static void ipcp_lowerdown (void);
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134 | static void ipcp_open (void);
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135 | static void ipcp_close (void);
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136 |
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137 | /*
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138 | * FSM ããå¼åºãããã³ã¼ã«ããã¯é¢
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139 | */
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140 |
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141 | static void ipcp_resetci(T_PPP_FSM *fsm); /* èªæ§ææ
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142 | å ±ããªã»ããããã */
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143 | static int_t ipcp_cilen (T_PPP_FSM *fsm); /* æ§ææ
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144 | å ±ã®é·ããè¿ãã */
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145 | static void ipcp_addci (T_PPP_FSM *fsm, T_NET_BUF *output);
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146 | /* èªæ§ææ
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147 | å ±ã追å ããã */
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148 | static bool_t ipcp_ackci (T_PPP_FSM *fsm, T_NET_BUF *input);
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149 | /* ACK ãåä¿¡ããã¨ãã®å¦ç */
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150 | static bool_t ipcp_nakci (T_PPP_FSM *fsm, T_NET_BUF *input);
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151 | /* NAK ãåä¿¡ããã¨ãã®å¦ç */
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152 | static bool_t ipcp_rejci (T_PPP_FSM *fsm, T_NET_BUF *input);
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153 | /* REJ ãåä¿¡ããã¨ãã®å¦ç */
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154 | static int_t ipcp_reqci (T_PPP_FSM *fsm, T_NET_BUF *input, T_NET_BUF *output);
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155 | /* ç¸æã®æ§ææ
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156 | å ±ã確èªããã */
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157 | static void ipcp_up (T_PPP_FSM *fsm); /* ãªã³ã¯æ¥ç¶ã確ç«ããã */
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158 | static void ipcp_down (T_PPP_FSM *fsm); /* ãªã³ã¯æ¥ç¶ã解æ¾ããã */
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159 | static void ipcp_finished(T_PPP_FSM *fsm); /* ä¸ä½å±¤ãçµäºããã */
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160 |
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161 | /*
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162 | * å¤æ°
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163 | */
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164 |
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165 | static T_IFNET ipcp_local_def_cfg = { /* èªæ§ææ
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166 | å ±ã®è¦å®å¤ */
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167 | NULL,
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168 | {
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169 | IPV4_ADDR_LOCAL, /* IPv4 ã¢ãã¬ã¹ */
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170 | UINT_C(0), /* ãµãããããã¹ã¯ */
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171 | },
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172 | };
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173 |
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174 | static T_IFNET ipcp_remote_def_cfg = { /* ç¸æã®æ§ææ
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175 | å ±ã®è¦å®å¤ */
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176 | NULL,
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177 | {
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178 | IPV4_ADDR_REMOTE, /* IPv4 ã¢ãã¬ã¹ */
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179 | UINT_C(0), /* ãµãããããã¹ã¯ */
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180 | }
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181 | };
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182 |
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183 | static T_IFNET ipcp_local_neg_cfg; /* ãã´ä¸ã®èªæ§ææ
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184 | å ± */
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185 |
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186 | static T_IFNET ipcp_remote_neg_cfg; /* ãã´ä¸ã®ç¸æã®æ§ææ
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187 | å ± */
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188 |
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189 | /*
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190 | * å
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191 | ¨åå¤æ°
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192 | */
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193 |
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194 | T_PPP_FSM_CALLBACKS ipcp_callbacks = {
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195 | ipcp_resetci, /* èªæ§ææ
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196 | å ±ããªã»ããããã */
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197 | ipcp_cilen, /* æ§ææ
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198 | å ±ã®é·ããè¿ãã */
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199 | ipcp_addci, /* èªæ§ææ
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200 | å ±ã追å ããã */
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201 | ipcp_ackci, /* ACK ãåä¿¡ããã¨ãã®å¦ç */
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202 | ipcp_nakci, /* NAK ãåä¿¡ããã¨ãã®å¦ç */
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203 | ipcp_rejci, /* REJ ãåä¿¡ããã¨ãã®å¦ç */
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204 | ipcp_reqci, /* ç¸æã®æ§ææ
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205 | å ±ã確èªããã */
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206 | ipcp_up, /* ãªã³ã¯æ¥ç¶ã確ç«ããã */
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207 | ipcp_down, /* ãªã³ã¯æ¥ç¶ã解æ¾ããã */
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208 | NULL, /* ä¸ä½å±¤ãéå§ããã */
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209 | ipcp_finished, /* ä¸ä½å±¤ãçµäºããã */
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210 | NULL, /* åéããã */
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211 | NULL, /* ä¸æ㪠CP ãåä¿¡ããã¨ãã®å¦ç */
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212 | };
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213 |
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214 | T_PPP_FSM ipcp_fsm = {
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215 | &ipcp_callbacks, /* ã³ã¼ã«ããã¯é¢æ° */
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216 | PPP_IPCP, /* ãããã³ã« */
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217 | };
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218 |
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219 | T_PPP_PROTENT ipcp_protent = {
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220 | PPP_IPCP,
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221 | ipcp_init, /* åæå */
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222 | ipcp_input, /* å
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223 | ¥å */
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224 | ipcp_protrej, /* Proto-REJ åä¿¡å¦ç */
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225 | ipcp_lowerup, /* ä¸ä½å±¤ãèµ·åãã */
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226 | ipcp_lowerdown, /* ä¸ä½å±¤ãåæ¢ãã */
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227 | ipcp_open, /* ãªã¼ãã³ãã */
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228 | ipcp_close, /* ã¯ãã¼ãºãã */
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229 | ip_input, /* ãã¼ã¿å
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230 | ¥åãIPv4 å
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231 | ¥å */
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232 | };
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233 |
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234 | T_IFNET ipcp_local_ack_cfg; /* ç¸æã«è¨±å¯ãããã®èªæ§ææ
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235 | å ± */
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236 | T_IFNET ipcp_remote_ack_cfg; /* ç¸æã«è¨±å¯ããæ§ææ
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237 | å ± */
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238 |
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239 | /*
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240 | * ppp_get_ifnet -- ãããã¯ã¼ã¯ã¤ã³ã¿ãã§ã¼ã¹æ§é ä½ãè¿ãã
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241 | */
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242 |
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243 | T_IFNET *
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244 | ppp_get_ifnet (void)
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245 | {
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246 | return &ipcp_local_ack_cfg;
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247 | }
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248 |
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249 | /*
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250 | * wait_ipcp -- IP æ¥ç¶å®äºã¾ã§å¾
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251 | ã¤ã
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252 | *
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253 | * æ»ãå¤: æ¥ç¶ã«å¤±æããã E_OBJ ãè¿ãã
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254 | */
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255 |
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256 | ER
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257 | wait_ipcp (void)
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258 | {
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259 | #ifdef PPP_CFG_MODEM
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260 | ER error;
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261 | #endif /* of #ifdef PPP_CFG_MODEM */
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262 |
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263 | if (ipcp_fsm.state <= PPP_FSM_STOPPED) {
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264 |
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265 | #ifdef PPP_CFG_MODEM
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266 |
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267 | /* ã¢ãã ã®æ¥ç¶å®äºã¾ã§å¾
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268 | ã¤ã*/
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269 | if ((error = wait_modem()) != E_OK)
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270 | return error;
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271 |
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272 | #else /* of #ifdef PPP_CFG_MODEM */
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273 |
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274 | /*
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275 | * ååãªã¼ãã³ããç¸æããã®æ¥ç¶å¾
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276 | ã¡ãªã LCP ãä¸åº¦ã¯ãã¼ãºãã
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277 | * è½åãªã¼ãã³ç¶æ
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278 | ã§ãåãªã¼ãã³ããã
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279 | */
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280 | lcp_close();
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281 | lcp_open(PPP_OPEN_ACTIVE);
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282 |
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283 | #endif /* of #ifdef PPP_CFG_MODEM */
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284 |
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285 | }
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286 |
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287 | if (ipcp_fsm.state != PPP_FSM_OPENED) {
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288 | /* IP æ¥ç¶å®äºã¾ã§å¾
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289 | ã¤ã*/
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290 | wai_sem(SEM_IPCP_READY);
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291 | if (ipcp_fsm.state != PPP_FSM_OPENED)
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292 | return E_OBJ;
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293 | }
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294 |
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295 | return E_OK;
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296 | }
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297 |
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298 | /*
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299 | * ipcp_init -- IPCP ã¢ã¸ã¥ã¼ã«ã®åæå
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300 | */
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301 |
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302 | static void
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303 | ipcp_init (void)
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304 | {
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305 | fsm_init(&ipcp_fsm);
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306 | }
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307 |
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308 | /*
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309 | * ipcp_input -- IPCP å
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310 | ¥å
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311 | */
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312 |
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313 | static void
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314 | ipcp_input (T_NET_BUF *input)
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315 | {
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316 | NET_COUNT_PPP_IPCP(net_count_ppp_ipcp_in_octets, input->len);
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317 | NET_COUNT_PPP_IPCP(net_count_ppp_ipcp_in_packets, 1);
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318 | fsm_input(&ipcp_fsm, input);
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319 | }
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320 |
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321 | /*
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322 | * ipcp_resetci -- IPCPã®æ§ææ
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323 | å ±ããªã»ããããã
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324 | */
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325 |
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326 | static void
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327 | ipcp_resetci (T_PPP_FSM *fsm)
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328 | {
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329 | /* èªæ§ææ
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330 | å ±ã®åæè¨å® */
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331 | ipcp_local_neg_cfg = ipcp_local_def_cfg;
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332 | memset((void*)&ipcp_local_ack_cfg, 0, sizeof(T_IFNET));
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333 |
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334 | /* ç¸æã®æ§ææ
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335 | å ±ã®åæè¨å® */
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336 | ipcp_remote_neg_cfg = ipcp_remote_def_cfg;
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337 | memset((void*)&ipcp_remote_ack_cfg, 0, sizeof(T_IFNET));
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338 | }
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339 |
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340 | /*
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341 | * ipcp_cilen -- æ§ææ
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342 | å ±ã®é·ããè¿ãã
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343 | */
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344 |
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345 | static int_t
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346 | ipcp_cilen (T_PPP_FSM *fsm)
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347 | {
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348 | int_t cilen = 0;
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349 |
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350 | cilen += sizeof(T_PPP_CI_HDR) + sizeof(uint32_t); /* IPv4 ã¢ãã¬ã¹ */
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351 |
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352 | return cilen;
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353 | }
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354 |
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355 | /*
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356 | * ipcp_addci -- IPCPã®æ§ææ
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357 | å ±ã追å ããã
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358 | */
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359 |
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360 | static void
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361 | ipcp_addci (T_PPP_FSM *fsm, T_NET_BUF *output)
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362 | {
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363 | uint8_t *buf;
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364 |
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365 | buf = output->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR);
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366 |
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367 | /* IPv4 ã¢ãã¬ã¹ãªãã·ã§ã³ã追å ããã */
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368 | *buf ++ = IPCP_CIT_ADDR;
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369 | *buf ++ = sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
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370 | ahtonl(buf, ipcp_local_neg_cfg.in4_ifaddr.addr);
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371 | buf += sizeof(uint32_t);
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372 | }
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373 |
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374 | /*
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375 | * ipcp_ackci -- ACK ãåä¿¡ããã¨ãã®å¦ç
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376 | *
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377 | * æ»ãå¤: true ACK ã¯æ£å¸¸
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378 | * false ACK ã¯ç°å¸¸
|
---|
379 | */
|
---|
380 |
|
---|
381 | static bool_t
|
---|
382 | ipcp_ackci (T_PPP_FSM *fsm, T_NET_BUF *input)
|
---|
383 | {
|
---|
384 | uint8_t *buf;
|
---|
385 | uint16_t len;
|
---|
386 |
|
---|
387 | buf = input->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR);
|
---|
388 | len = input->len - (sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
|
---|
389 |
|
---|
390 | /*
|
---|
391 | * æ§ææ
|
---|
392 | å ±ã¯éä¿¡ããé ã«å®å
|
---|
393 | ¨ã«ä¸è´ããªããã°ãªããªãã
|
---|
394 | * å¾ã£ã¦ãipcp_addci ã§ä½æããé ã«è§£æããã
|
---|
395 | */
|
---|
396 |
|
---|
397 | /* ADDR ãªãã·ã§ã³ã解æããã */
|
---|
398 | if (len < sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) ||
|
---|
399 | *buf ++ != IPCP_CIT_ADDR ||
|
---|
400 | *buf ++ != sizeof(T_PPP_CI_HDR) + sizeof(uint32_t)||
|
---|
401 | nahcmpl(buf, ipcp_local_neg_cfg.in4_ifaddr.addr))
|
---|
402 | return false;
|
---|
403 | buf += sizeof(uint32_t);
|
---|
404 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
405 |
|
---|
406 | return true;
|
---|
407 | }
|
---|
408 |
|
---|
409 | /*
|
---|
410 | * ipcp_nakci -- NAK ãåä¿¡ããã¨ãã®å¦ç
|
---|
411 | *
|
---|
412 | * æ»ãå¤: 1 NAK ã¯æ£å¸¸
|
---|
413 | * 0 NAK ã¯ç°å¸¸
|
---|
414 | */
|
---|
415 |
|
---|
416 | static int_t
|
---|
417 | ipcp_nakci (T_PPP_FSM *fsm, T_NET_BUF *input)
|
---|
418 | {
|
---|
419 | T_IFNET new_cfg;
|
---|
420 | uint32_t cilong;
|
---|
421 | uint16_t len;
|
---|
422 | uint8_t *buf, cilen;
|
---|
423 |
|
---|
424 | buf = input->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR);
|
---|
425 | len = input->len - (sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
|
---|
426 |
|
---|
427 | new_cfg = ipcp_local_neg_cfg;
|
---|
428 |
|
---|
429 | /* ADDR ãªãã·ã§ã³ã解æããã */
|
---|
430 | if (len >= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) &&
|
---|
431 | * buf == IPCP_CIT_ADDR &&
|
---|
432 | *(buf + 1) == sizeof(T_PPP_CI_HDR) + sizeof(uint32_t)) {
|
---|
433 | ntoahl(cilong, buf + 2);
|
---|
434 | buf += sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
435 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
436 | new_cfg.in4_ifaddr.addr = cilong;
|
---|
437 | }
|
---|
438 |
|
---|
439 | /* å¾ã¯ç¡è¦ããã*/
|
---|
440 | while (len > sizeof(T_PPP_CI_HDR)) {
|
---|
441 | cilen = *(buf + 1);
|
---|
442 | if (len < cilen)
|
---|
443 | return 0;
|
---|
444 | buf += cilen;
|
---|
445 | len -= cilen;
|
---|
446 | }
|
---|
447 |
|
---|
448 | /* é·ãã 0 ã§ãªããã°ã¨ã©ã¼ */
|
---|
449 | if (len != 0)
|
---|
450 | return 0;
|
---|
451 |
|
---|
452 | /* æ°ãããªãã·ã§ã³ãè¨å®ããã*/
|
---|
453 | if (fsm->state != PPP_FSM_OPENED)
|
---|
454 | ipcp_local_neg_cfg = new_cfg;
|
---|
455 |
|
---|
456 | return 1;
|
---|
457 | }
|
---|
458 |
|
---|
459 | /*
|
---|
460 | * ipcp_rejci -- REJ ãåä¿¡ããã¨ãã®å¦ç
|
---|
461 | *
|
---|
462 | * æ»ãå¤: 1 REJ ã¯æ£å¸¸
|
---|
463 | * 0 REJ ã¯ç°å¸¸
|
---|
464 | */
|
---|
465 |
|
---|
466 | static int_t
|
---|
467 | ipcp_rejci (T_PPP_FSM *fsm, T_NET_BUF *input)
|
---|
468 | {
|
---|
469 | T_IFNET new_cfg;
|
---|
470 | uint8_t *buf;
|
---|
471 | uint16_t len;
|
---|
472 |
|
---|
473 | buf = input->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR);
|
---|
474 | len = input->len - (sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
|
---|
475 |
|
---|
476 | new_cfg = ipcp_local_neg_cfg;
|
---|
477 |
|
---|
478 | /* ADDR ãªãã·ã§ã³ã解æããã */
|
---|
479 | if (len >= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) &&
|
---|
480 | * buf == IPCP_CIT_ADDR &&
|
---|
481 | *(buf + 1) == sizeof(T_PPP_CI_HDR) + sizeof(uint32_t)) {
|
---|
482 | buf += sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
483 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
484 | new_cfg.in4_ifaddr.addr = 0;
|
---|
485 | }
|
---|
486 |
|
---|
487 | /* é·ãã 0 ã§ãªããã°ã¨ã©ã¼ */
|
---|
488 | if (len != 0)
|
---|
489 | return 0;
|
---|
490 |
|
---|
491 | /* æ°ãããªãã·ã§ã³ãè¨å®ããã*/
|
---|
492 | if (fsm->state != PPP_FSM_OPENED)
|
---|
493 | ipcp_local_neg_cfg = new_cfg;
|
---|
494 |
|
---|
495 | return 1;
|
---|
496 | }
|
---|
497 |
|
---|
498 | /*
|
---|
499 | * ipcp_reqci -- ç¸æã®æ§ææ
|
---|
500 | å ±ã解æããã
|
---|
501 | */
|
---|
502 |
|
---|
503 | static int_t
|
---|
504 | ipcp_reqci (T_PPP_FSM *fsm, T_NET_BUF *input, T_NET_BUF *output)
|
---|
505 | {
|
---|
506 | uint32_t addr;
|
---|
507 | uint16_t code, final, len, cilen;
|
---|
508 | uint8_t *np, *rp, *ap, *cp, type = 0;
|
---|
509 |
|
---|
510 | rp = ap = input->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR);
|
---|
511 | /* rp: REJãap: ACK ãã CI ã®ãã¤ã³ã¿ */
|
---|
512 | /* æå¦ããå ´åã¯ãå¼æ° buf ã«ä¸æ¸ãããã */
|
---|
513 | len = input->len - (sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
|
---|
514 | np = output->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR);
|
---|
515 | final = PPP_CONFACK; /* æçµçã«éä¿¡ããã³ã¼ã */
|
---|
516 | while (len > 0) {
|
---|
517 | code = PPP_CONFACK;
|
---|
518 | cp = ap; /* cp: ç¾å¨å¦çä¸ã® CI */
|
---|
519 |
|
---|
520 | if (len < sizeof(T_PPP_CI_HDR)) {
|
---|
521 |
|
---|
522 | /* æ®ãã CI ãããããçã */
|
---|
523 | syslog(LOG_NOTICE, "[PPP/IPCP] bad CI len: %d.", len);
|
---|
524 | cilen = len; /* ãã¼ã¿é·ãç°å¸¸ã®å ´åã®å¦ç½® */
|
---|
525 | len = 0; /* ã«ã¼ãããæããã */
|
---|
526 | code = PPP_CONFREJ;
|
---|
527 | goto endswitch;
|
---|
528 | }
|
---|
529 |
|
---|
530 | type = *ap ++; /* CI ã®å */
|
---|
531 | cilen = *ap ++; /* CI ã®é·ã */
|
---|
532 | if (len < cilen) {
|
---|
533 |
|
---|
534 | /* æ®ãã CI é·ããçã */
|
---|
535 | syslog(LOG_NOTICE, "[PPP/IPCP] bad CI len: %d.", cilen);
|
---|
536 | cilen = len; /* ãã¼ã¿é·ãç°å¸¸ã®å ´åã®å¦ç½® */
|
---|
537 | len = 0; /* ã«ã¼ãããæããã */
|
---|
538 | code = PPP_CONFREJ;
|
---|
539 | goto endswitch;
|
---|
540 | }
|
---|
541 | len -= sizeof(T_PPP_CI_HDR);
|
---|
542 |
|
---|
543 | /* CI ã®åã«ããåå²ããã*/
|
---|
544 | switch (type) {
|
---|
545 |
|
---|
546 | case IPCP_CIT_ADDR: /* IPv4 ã¢ãã¬ã¹ */
|
---|
547 |
|
---|
548 | /* CI é·ããããã + 4 ãªã¯ãããã§ãªããã°ã¨ã©ã¼ */
|
---|
549 | if (cilen != sizeof(T_PPP_CI_HDR) + sizeof(uint32_t))
|
---|
550 | code = PPP_CONFREJ;
|
---|
551 | else {
|
---|
552 | ntoahl(addr, ap);
|
---|
553 | if (addr != ipcp_remote_neg_cfg.in4_ifaddr.addr &&
|
---|
554 | (addr == 0 || ipcp_remote_neg_cfg.in4_ifaddr.addr != 0)) {
|
---|
555 | *np ++ = IPCP_CIT_ADDR;
|
---|
556 | *np ++ = sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
557 | ahtonl(np, ipcp_remote_neg_cfg.in4_ifaddr.addr);
|
---|
558 | np += sizeof(uint32_t);
|
---|
559 | code = PPP_CONFNAK;
|
---|
560 | }
|
---|
561 | #if 1 /* è¦ç¢ºèª */
|
---|
562 | else if (addr == 0 && ipcp_remote_neg_cfg.in4_ifaddr.addr == 0)
|
---|
563 | #else
|
---|
564 | else if (addr == 0 || ipcp_remote_neg_cfg.in4_ifaddr.addr == 0)
|
---|
565 | #endif
|
---|
566 | code = PPP_CONFREJ;
|
---|
567 | else
|
---|
568 | ipcp_remote_neg_cfg.in4_ifaddr.addr = addr;
|
---|
569 | }
|
---|
570 | break;
|
---|
571 |
|
---|
572 | default:
|
---|
573 | syslog(LOG_INFO, "[PPP/IPCP] unexp opt: %d.", type);
|
---|
574 | code = PPP_CONFREJ;
|
---|
575 | break;
|
---|
576 | }
|
---|
577 | endswitch:
|
---|
578 |
|
---|
579 | if (code == PPP_CONFNAK) {
|
---|
580 | /* CI ã®åã Magic Number ã®å ´åãé¤ãã¦ãNAK ã®åæ°ã */
|
---|
581 | /* æå¤§å¤ MAX_PPP_FAILURES ãè¶
|
---|
582 | ãããæå¦ããã */
|
---|
583 | if (fsm->failures >= MAX_PPP_FAILURES)
|
---|
584 | code = PPP_CONFREJ;
|
---|
585 | else if (final != PPP_CONFREJ)
|
---|
586 | final = PPP_CONFNAK;
|
---|
587 | }
|
---|
588 |
|
---|
589 | /* ãã® CI ãæå¦ãã */
|
---|
590 | if (code == PPP_CONFREJ) {
|
---|
591 | if (rp < cp) /* åã«è©°ããã*/
|
---|
592 | memcpy(rp, cp, cilen);
|
---|
593 | rp += cilen;
|
---|
594 | final = PPP_CONFREJ;
|
---|
595 | }
|
---|
596 |
|
---|
597 | ap += cilen - sizeof(T_PPP_CI_HDR);
|
---|
598 | len -= cilen - sizeof(T_PPP_CI_HDR);
|
---|
599 | }
|
---|
600 |
|
---|
601 | /* æçµçãªé·ãã調æ´ããã*/
|
---|
602 | switch (final) {
|
---|
603 | case PPP_CONFNAK:
|
---|
604 | output->len = np - output->buf;
|
---|
605 | memcpy(output->buf, input->buf, sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
|
---|
606 | break;
|
---|
607 | case PPP_CONFREJ:
|
---|
608 | memcpy(output->buf, input->buf, output->len = rp - input->buf);
|
---|
609 | break;
|
---|
610 | case PPP_CONFACK:
|
---|
611 | memcpy(output->buf, input->buf, input->len);
|
---|
612 | break;
|
---|
613 | }
|
---|
614 |
|
---|
615 | return final;
|
---|
616 | }
|
---|
617 |
|
---|
618 | /*
|
---|
619 | * ipcp_up -- ãªã³ã¯æ¥ç¶ã確ç«ããã
|
---|
620 | */
|
---|
621 |
|
---|
622 | static void
|
---|
623 | ipcp_up (T_PPP_FSM *fsm)
|
---|
624 | {
|
---|
625 | /* èªæ§ææ
|
---|
626 | å ±ã®åæè¨å® */
|
---|
627 | ipcp_local_ack_cfg = ipcp_local_neg_cfg;
|
---|
628 |
|
---|
629 | /*
|
---|
630 | * ãµãããããã¹ã¯ã¨
|
---|
631 | * ãã¼ã«ã«ã»ããã¼ããã£ã¹ã IPv4 ã¢ãã¬ã¹ãè¨å®ããã
|
---|
632 | */
|
---|
633 | ipcp_local_ack_cfg.in4_ifaddr.mask = MAKE_IPV4_LOCAL_MASK(ipcp_local_neg_cfg.in4_ifaddr.addr);
|
---|
634 |
|
---|
635 | /* ç¸æã®æ§ææ
|
---|
636 | å ±ã®åæè¨å® */
|
---|
637 | ipcp_remote_ack_cfg = ipcp_remote_neg_cfg;
|
---|
638 |
|
---|
639 | /*
|
---|
640 | * ãµãããããã¹ã¯ã¨
|
---|
641 | * ãã¼ã«ã«ã»ããã¼ããã£ã¹ã IPv4 ã¢ãã¬ã¹ãè¨å®ããã
|
---|
642 | */
|
---|
643 | ipcp_remote_ack_cfg.in4_ifaddr.mask = MAKE_IPV4_LOCAL_MASK(ipcp_remote_neg_cfg.in4_ifaddr.addr);
|
---|
644 |
|
---|
645 | sig_sem(SEM_IPCP_READY);
|
---|
646 |
|
---|
647 | syslog(LOG_NOTICE, "[PPP/IPCP] up, Local IPv4 Addr: %s, Remote IPv4 Addr: %s.",
|
---|
648 | ip2str(NULL, &ipcp_local_neg_cfg.in4_ifaddr.addr),
|
---|
649 | ip2str(NULL, &ipcp_remote_neg_cfg.in4_ifaddr.addr));
|
---|
650 | }
|
---|
651 |
|
---|
652 | /*
|
---|
653 | * ipcp_down -- ãªã³ã¯æ¥ç¶ã解æ¾ããã
|
---|
654 | */
|
---|
655 |
|
---|
656 | static void
|
---|
657 | ipcp_down (T_PPP_FSM *fsm)
|
---|
658 | {
|
---|
659 | sig_sem(SEM_IPCP_READY);
|
---|
660 | syslog(LOG_NOTICE, "[PPP/IPCP] down.");
|
---|
661 | }
|
---|
662 |
|
---|
663 | /*
|
---|
664 | * ipcp_finished -- ä¸ä½å±¤ãçµäºããã
|
---|
665 | */
|
---|
666 |
|
---|
667 | static void
|
---|
668 | ipcp_finished (T_PPP_FSM *fsm)
|
---|
669 | {
|
---|
670 | }
|
---|
671 |
|
---|
672 | /*
|
---|
673 | * ipcp_protrej -- Proto-REJ ãåä¿¡ããã¨ãã®å¦ç
|
---|
674 | */
|
---|
675 |
|
---|
676 | static void
|
---|
677 | ipcp_protrej (void)
|
---|
678 | {
|
---|
679 | fsm_lowerdown(&ipcp_fsm);
|
---|
680 | }
|
---|
681 |
|
---|
682 | /*
|
---|
683 | * ipcp_lowerup -- IPCP ä¸ä½å±¤ãèµ·åããã
|
---|
684 | */
|
---|
685 |
|
---|
686 | static void
|
---|
687 | ipcp_lowerup (void)
|
---|
688 | {
|
---|
689 | fsm_lowerup(&ipcp_fsm);
|
---|
690 | }
|
---|
691 |
|
---|
692 | /*
|
---|
693 | * ipcp_lowerdown -- IPCP ä¸ä½å±¤ãåæ¢ããã
|
---|
694 | */
|
---|
695 |
|
---|
696 | static void
|
---|
697 | ipcp_lowerdown (void)
|
---|
698 | {
|
---|
699 | fsm_lowerdown(&ipcp_fsm);
|
---|
700 | }
|
---|
701 |
|
---|
702 | /*
|
---|
703 | * ipcp_open -- IPCP ã®ãªã¼ãã³
|
---|
704 | */
|
---|
705 |
|
---|
706 | static void
|
---|
707 | ipcp_open (void)
|
---|
708 | {
|
---|
709 | fsm_open(&ipcp_fsm);
|
---|
710 | }
|
---|
711 |
|
---|
712 | /*
|
---|
713 | * ipcp_close -- IPCP ã®ã¯ãã¼ãº
|
---|
714 | */
|
---|
715 |
|
---|
716 | static void
|
---|
717 | ipcp_close (void)
|
---|
718 | {
|
---|
719 | fsm_close(&ipcp_fsm);
|
---|
720 | }
|
---|
721 |
|
---|
722 | #endif /* fo #ifdef SUPPORT_PPP */
|
---|