[270] | 1 | /*
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| 2 | * TINET (TCP/IP Protocol Stack)
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| 3 | *
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| 4 | * Copyright (C) 2001-2009 by Dep. of Computer Science and Engineering
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| 5 | * Tomakomai National College of Technology, JAPAN
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| 6 | *
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| 7 | * ä¸è¨èä½æ¨©è
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| 8 | ã¯ï¼ä»¥ä¸ã® (1)ï½(4) ã®æ¡ä»¶ãï¼Free Software Foundation
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| 9 | * ã«ãã£ã¦å
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| 10 | ¬è¡¨ããã¦ãã GNU General Public License ã® Version 2 ã«è¨
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| 11 | * è¿°ããã¦ããæ¡ä»¶ãæºããå ´åã«éãï¼æ¬ã½ããã¦ã§ã¢ï¼æ¬ã½ããã¦ã§ã¢
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| 12 | * ãæ¹å¤ãããã®ãå«ãï¼ä»¥ä¸åãï¼ã使ç¨ã»è¤è£½ã»æ¹å¤ã»åé
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| 13 | å¸ï¼ä»¥ä¸ï¼
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| 14 | * å©ç¨ã¨å¼ã¶ï¼ãããã¨ãç¡åã§è¨±è«¾ããï¼
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| 15 | * (1) æ¬ã½ããã¦ã§ã¢ãã½ã¼ã¹ã³ã¼ãã®å½¢ã§å©ç¨ããå ´åã«ã¯ï¼ä¸è¨ã®èä½
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| 16 | * 権表示ï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãï¼ãã®ã¾ã¾ã®å½¢ã§ã½ã¼
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| 17 | * ã¹ã³ã¼ãä¸ã«å«ã¾ãã¦ãããã¨ï¼
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| 18 | * (2) æ¬ã½ããã¦ã§ã¢ãï¼ã©ã¤ãã©ãªå½¢å¼ãªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
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| 19 | * ç¨ã§ããå½¢ã§åé
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| 20 | å¸ããå ´åã«ã¯ï¼åé
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| 21 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨
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| 22 | * è
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| 23 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®èä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨
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| 24 | * ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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| 25 | * (3) æ¬ã½ããã¦ã§ã¢ãï¼æ©å¨ã«çµã¿è¾¼ããªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
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| 26 | * ç¨ã§ããªãå½¢ã§åé
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| 27 | å¸ããå ´åã«ã¯ï¼æ¬¡ã®æ¡ä»¶ãæºãããã¨ï¼
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| 28 | * (a) åé
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| 29 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨è
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| 30 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®è
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| 31 | * ä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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| 32 | * (4) æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´æ¥çã¾ãã¯éæ¥çã«çãããããªãæ
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| 33 | * 害ãããï¼ä¸è¨èä½æ¨©è
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| 34 | ããã³TOPPERSããã¸ã§ã¯ããå
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| 35 | 責ãããã¨ï¼
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| 36 | *
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| 37 | * æ¬ã½ããã¦ã§ã¢ã¯ï¼ç¡ä¿è¨¼ã§æä¾ããã¦ãããã®ã§ããï¼ä¸è¨èä½æ¨©è
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| 38 | ã
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| 39 | * ãã³TOPPERSããã¸ã§ã¯ãã¯ï¼æ¬ã½ããã¦ã§ã¢ã«é¢ãã¦ï¼ãã®é©ç¨å¯è½æ§ã
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| 40 | * å«ãã¦ï¼ãããªãä¿è¨¼ãè¡ããªãï¼ã¾ãï¼æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´
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| 41 | * æ¥çã¾ãã¯éæ¥çã«çãããããªãæ害ã«é¢ãã¦ãï¼ãã®è²¬ä»»ãè² ããªãï¼
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| 42 | *
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| 43 | * @(#) $Id: ppp_lcp.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 | * lcp.c - PPP Link 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 Link Control Protocol (LCP) 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/lcp.c,v 1.81.2.3 2000/08/19 09:30:04 brian Exp $
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| 85 | *
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| 86 | */
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| 87 |
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| 88 | #include <string.h>
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| 89 |
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| 90 | #include <s_services.h>
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| 91 | #include <t_services.h>
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| 92 | #include "kernel_id.h"
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| 93 |
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| 94 | #include <tinet_defs.h>
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| 95 | #include <tinet_config.h>
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| 96 |
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| 97 | #include <net/if.h>
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| 98 | #include <net/if_ppp.h>
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| 99 | #include <net/net.h>
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| 100 | #include <net/net_var.h>
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| 101 | #include <net/net_buf.h>
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| 102 | #include <net/net_timer.h>
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| 103 | #include <net/net_count.h>
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| 104 | #include <net/ppp.h>
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| 105 | #include <net/ppp_var.h>
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| 106 | #include <net/ppp_hdlc.h>
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| 107 | #include <net/ppp_auth.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 |
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| 111 | #ifdef SUPPORT_PPP
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| 112 |
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| 113 | /*
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| 114 | * é¢æ°
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| 115 | */
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| 116 |
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| 117 | static void lcp_init (void);
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| 118 | static void lcp_protrej (void);
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| 119 | static void lcp_input (T_NET_BUF *input);
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| 120 |
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| 121 | #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC
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| 122 |
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| 123 | static void send_echo_req (T_PPP_FSM *fsm);
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| 124 | static void recv_echo_rep (T_PPP_FSM *fsm, uint8_t id, T_NET_BUF *input);
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| 125 | static void echo_timeout (void *arg);
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| 126 | static void echo_lowerup (void);
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| 127 | static void echo_lowerdown (void);
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| 128 |
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| 129 | #endif /* of #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC */
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| 130 |
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| 131 | /*
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| 132 | * FSM ããå¼åºãããã³ã¼ã«ããã¯é¢æ°
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| 133 | */
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| 134 |
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| 135 | static void lcp_resetci(T_PPP_FSM *fsm); /* èªæ§ææ
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| 136 | å ±ããªã»ããããã */
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| 137 | static int_t lcp_cilen (T_PPP_FSM *fsm); /* æ§ææ
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| 138 | å ±ã®é·ããè¿ãã */
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| 139 | static void lcp_addci (T_PPP_FSM *fsm, T_NET_BUF *output);
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| 140 | /* èªæ§ææ
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| 141 | å ±ã追å ããã */
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| 142 | static bool_t lcp_ackci (T_PPP_FSM *fsm, T_NET_BUF *input);
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| 143 | /* ACK ãåä¿¡ããã¨ãã®å¦ç */
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| 144 | static bool_t lcp_nakci (T_PPP_FSM *fsm, T_NET_BUF *input);
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| 145 | /* NAK ãåä¿¡ããã¨ãã®å¦ç */
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| 146 | static bool_t lcp_rejci (T_PPP_FSM *fsm, T_NET_BUF *input);
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| 147 | /* REJ ãåä¿¡ããã¨ãã®å¦ç */
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| 148 | static int_t lcp_reqci (T_PPP_FSM *fsm, T_NET_BUF *input, T_NET_BUF *output);
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| 149 | /* ç¸æã®æ§ææ
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| 150 | å ±ã確èªããã */
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| 151 | static void lcp_up (T_PPP_FSM *fsm); /* ãªã³ã¯æ¥ç¶ã確ç«ããã */
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| 152 | static void lcp_starting(T_PPP_FSM *fsm); /* ä¸ä½å±¤ãéå§ããã */
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| 153 | static bool_t lcp_extcode (T_PPP_FSM *fsm, uint8_t code, uint8_t id, T_NET_BUF *input);
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| 154 | /* ä¸æ㪠CP ãåä¿¡ããã¨ãã®å¦ç */
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| 155 | static void lcp_rprotrej(T_PPP_FSM *fsm, T_NET_BUF *input);
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| 156 | /* Proto-REJ ãåä¿¡ããã¨ãã®å¦ç */
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| 157 | /*
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| 158 | * å¤æ°
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| 159 | */
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| 160 |
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| 161 | static T_LCP_CONFIGS lcp_def_cfg = { /* æ§ææ
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| 162 | å ±ã®åæè¨å®å¤ */
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| 163 | DEF_REMOTE_ACCM, /* ACCM */
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| 164 |
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| 165 | #ifdef LCP_CFG_MAGIC
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| 166 |
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| 167 | ULONG_C(0), /* ãã¸ãã¯çªå· */
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| 168 |
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| 169 | #endif /* of #ifdef LCP_CFG_MAGIC */
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| 170 |
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| 171 | DEF_PPP_MTU, /* MRU */
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| 172 | UINT_C(0), /* ãªãã·ã§ã³ãã©ã° */
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| 173 | };
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| 174 |
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| 175 | static T_LCP_CONFIGS lcp_local_def_cfg = { /* èªæ§ææ
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| 176 | å ±ã®è¦å®å¤ */
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| 177 | DEF_LOCAL_ACCM, /* ACCM */
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| 178 |
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| 179 | #ifdef LCP_CFG_MAGIC
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| 180 |
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| 181 | ULONG_C(0), /* ãã¸ãã¯çªå· */
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| 182 |
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| 183 | #endif /* of #ifdef LCP_CFG_MAGIC */
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| 184 |
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| 185 | DEF_PPP_MTU, /* MRU */
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| 186 | DEF_LCP_LOCAL_CFGS, /* ãªãã·ã§ã³ãã©ã° */
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| 187 | };
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| 188 |
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| 189 | static T_LCP_CONFIGS lcp_local_neg_cfg; /* ãã´ä¸ã®èªæ§ææ
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| 190 | å ± */
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| 191 |
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| 192 | static T_LCP_CONFIGS lcp_remote_neg_cfg; /* ãã´ä¸ã®ç¸æã®æ§ææ
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| 193 | å ± */
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| 194 |
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| 195 | #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC
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| 196 |
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| 197 | static uint8_t echo_pending = UINT_C(0);
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| 198 | static uint8_t echo_number = UINT_C(0);
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| 199 | static uint8_t timer_running = false;
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| 200 |
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| 201 | #endif /* of #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC */
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| 202 |
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| 203 | /*
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| 204 | * å
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| 205 | ¨åå¤æ°
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| 206 | */
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| 207 |
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| 208 | T_PPP_FSM_CALLBACKS lcp_callbacks = {
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| 209 | lcp_resetci, /* èªæ§ææ
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| 210 | å ±ããªã»ããããã */
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| 211 | lcp_cilen, /* æ§ææ
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| 212 | å ±ã®é·ããè¿ãã */
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| 213 | lcp_addci, /* èªæ§ææ
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| 214 | å ±ã追å ããã */
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| 215 | lcp_ackci, /* ACK ãåä¿¡ããã¨ãã®å¦ç */
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| 216 | lcp_nakci, /* NAK ãåä¿¡ããã¨ãã®å¦ç */
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| 217 | lcp_rejci, /* REJ ãåä¿¡ããã¨ãã®å¦ç */
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| 218 | lcp_reqci, /* ç¸æã®æ§ææ
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| 219 | å ±ã確èªããã */
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| 220 | lcp_up, /* ãªã³ã¯æ¥ç¶ã確ç«ããã */
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| 221 | lcp_down, /* ãªã³ã¯æ¥ç¶ã解æ¾ããã */
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| 222 | lcp_starting, /* ä¸ä½å±¤ãéå§ããã */
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| 223 | lcp_finished, /* ä¸ä½å±¤ãçµäºããã */
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| 224 | NULL, /* åéããã */
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| 225 | lcp_extcode, /* ä¸æ㪠CP ãåä¿¡ããã¨ãã®å¦ç */
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| 226 | };
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| 227 |
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| 228 | T_PPP_FSM lcp_fsm = {
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| 229 | &lcp_callbacks, /* ã³ã¼ã«ããã¯é¢æ° */
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| 230 | PPP_LCP, /* ãããã³ã« */
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| 231 | };
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| 232 |
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| 233 | T_PPP_PROTENT lcp_protent = {
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| 234 | PPP_LCP,
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| 235 | lcp_init, /* åæå */
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| 236 | lcp_input, /* å
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| 237 | ¥å */
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| 238 | lcp_protrej, /* Proto-REJ åä¿¡å¦ç */
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| 239 | NULL, /* ä¸ä½å±¤ãèµ·åãã */
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| 240 | lcp_lowerdown, /* ä¸ä½å±¤ãåæ¢ãã */
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| 241 | NULL, /* ãªã¼ãã³ãã */
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| 242 | lcp_close, /* ã¯ãã¼ãºãã */
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| 243 | NULL, /* ãã¼ã¿å
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| 244 | ¥å */
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| 245 | };
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| 246 |
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| 247 | T_LCP_CONFIGS lcp_local_ack_cfg; /* ç¸æã«è¨±å¯ãããã®èªæ§ææ
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| 248 | å ± */
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| 249 | T_LCP_CONFIGS lcp_remote_ack_cfg; /* ç¸æã«è¨±å¯ããæ§ææ
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| 250 | å ± */
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| 251 |
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| 252 | /*
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| 253 | * lcp_init -- LCP ã¢ã¸ã¥ã¼ã«ã®åæå
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| 254 | */
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| 255 |
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| 256 | static void
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| 257 | lcp_init (void)
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| 258 | {
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| 259 | fsm_init(&lcp_fsm);
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| 260 | }
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| 261 |
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| 262 | /*
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| 263 | * lcp_input -- LCP å
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| 264 | ¥å
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| 265 | */
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| 266 |
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| 267 | static void
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| 268 | lcp_input (T_NET_BUF *input)
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| 269 | {
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| 270 | NET_COUNT_PPP_LCP(net_count_ppp_lcp_in_octets, input->len);
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| 271 | NET_COUNT_PPP_LCP(net_count_ppp_lcp_in_packets, 1);
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| 272 | fsm_input(&lcp_fsm, input);
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| 273 | }
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| 274 |
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| 275 | /*
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| 276 | * lcp_resetci -- LCPã®æ§ææ
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| 277 | å ±ããªã»ããããã
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| 278 | */
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| 279 |
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| 280 | static void
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| 281 | lcp_resetci (T_PPP_FSM *fsm)
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| 282 | {
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| 283 | #ifdef LCP_CFG_MAGIC
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| 284 |
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| 285 | SYSTIM time;
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| 286 |
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| 287 | #endif /* of #ifdef LCP_CFG_MAGIC */
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| 288 |
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| 289 | /* èªæ§ææ
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| 290 | å ±ã®åæè¨å® */
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| 291 | lcp_local_neg_cfg = lcp_local_def_cfg;
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| 292 | lcp_local_ack_cfg = lcp_def_cfg;
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| 293 |
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| 294 | /* ç¸æã®æ§ææ
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| 295 | å ±ã®åæè¨å® */
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| 296 | lcp_remote_neg_cfg = lcp_def_cfg;
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| 297 | lcp_remote_ack_cfg = lcp_def_cfg;
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| 298 |
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| 299 | #ifdef LCP_CFG_MAGIC
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| 300 |
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| 301 | syscall(get_tim(&time));
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| 302 | net_srand((unsigned int)time);
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| 303 | lcp_local_neg_cfg.magic = net_rand();
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| 304 |
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| 305 | #endif /* of #ifdef LCP_CFG_MAGIC */
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| 306 |
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| 307 | auth_reset();
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| 308 | }
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| 309 |
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| 310 | /*
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| 311 | * lcp_cilen -- æ§ææ
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| 312 | å ±ã®é·ããè¿ãã
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| 313 | */
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| 314 |
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| 315 | static int_t
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| 316 | lcp_cilen (T_PPP_FSM *fsm)
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| 317 | {
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| 318 | int_t cilen = 0;
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| 319 |
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| 320 | if (lcp_local_neg_cfg.options & LCP_CFG_MRU)
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| 321 | cilen += sizeof(T_PPP_CI_HDR) + sizeof(uint16_t); /* MRU */
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| 322 |
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| 323 | if (lcp_local_neg_cfg.options & LCP_CFG_ACCM)
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| 324 | cilen += sizeof(T_PPP_CI_HDR) + sizeof(uint32_t); /* ACCM */
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| 325 |
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| 326 | #ifdef LCP_CFG_MAGIC
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| 327 |
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| 328 | if (lcp_local_neg_cfg.options & LCP_CFG_MAGIC)
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| 329 | cilen += sizeof(T_PPP_CI_HDR) + sizeof(uint32_t); /* Magic */
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| 330 |
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| 331 | #endif /* of #ifdef LCP_CFG_MAGIC */
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| 332 |
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| 333 | #ifdef LCP_CFG_PAP
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| 334 |
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| 335 | if (lcp_local_neg_cfg.options & LCP_CFG_PAP)
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| 336 | cilen += sizeof(T_PPP_CI_HDR) + sizeof(uint16_t); /* PAP */
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| 337 |
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| 338 | #endif /* of #ifdef LCP_CFG_PAP */
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| 339 |
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| 340 | #ifdef LCP_CFG_PCOMP
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| 341 |
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| 342 | if (lcp_local_neg_cfg.options & LCP_CFG_PCOMP)
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| 343 | cilen += sizeof(T_PPP_CI_HDR); /* ãããã³ã«å§ç¸® */
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| 344 |
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| 345 | #endif /* of #ifdef LCP_CFG_PCOMP */
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| 346 |
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| 347 | #ifdef LCP_CFG_ACCOMP
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| 348 |
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| 349 | if (lcp_local_neg_cfg.options & LCP_CFG_ACCOMP)
|
---|
| 350 | cilen += sizeof(T_PPP_CI_HDR); /* ã¢ãã¬ã¹ã»å¶å¾¡å§ç¸® */
|
---|
| 351 |
|
---|
| 352 | #endif /* of #ifdef LCP_CFG_ACCOMP */
|
---|
| 353 |
|
---|
| 354 | return cilen;
|
---|
| 355 | }
|
---|
| 356 |
|
---|
| 357 | /*
|
---|
| 358 | * lcp_addci -- LCPã®æ§ææ
|
---|
| 359 | å ±ã追å ããã
|
---|
| 360 | */
|
---|
| 361 |
|
---|
| 362 | static void
|
---|
| 363 | lcp_addci (T_PPP_FSM *fsm, T_NET_BUF *output)
|
---|
| 364 | {
|
---|
| 365 | uint8_t *buf;
|
---|
| 366 |
|
---|
| 367 | buf = output->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR);
|
---|
| 368 |
|
---|
| 369 | /* MRU ãªãã·ã§ã³ã追å ããã */
|
---|
| 370 | if (lcp_local_neg_cfg.options & LCP_CFG_MRU) {
|
---|
| 371 | *buf ++ = LCP_CIT_MRU;
|
---|
| 372 | *buf ++ = sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 373 | *((uint16_t*)buf) = htons(lcp_local_neg_cfg.MRU);
|
---|
| 374 | buf += sizeof(uint16_t);
|
---|
| 375 | }
|
---|
| 376 |
|
---|
| 377 | /* ACCM ãªãã·ã§ã³ã追å ããã */
|
---|
| 378 | if (lcp_local_neg_cfg.options & LCP_CFG_ACCM) {
|
---|
| 379 | *buf ++ = LCP_CIT_ACCM;
|
---|
| 380 | *buf ++ = sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 381 | ahtonl(buf, lcp_local_neg_cfg.ACCM);
|
---|
| 382 | buf += sizeof(uint32_t);
|
---|
| 383 | }
|
---|
| 384 |
|
---|
| 385 | #ifdef LCP_CFG_MAGIC
|
---|
| 386 |
|
---|
| 387 | /* Magic Number ãªãã·ã§ã³ã追å ããã */
|
---|
| 388 | if (lcp_local_neg_cfg.options & LCP_CFG_MAGIC) {
|
---|
| 389 | *buf ++ = LCP_CIT_MAGIC;
|
---|
| 390 | *buf ++ = sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 391 | ahtonl(buf, lcp_local_neg_cfg.magic);
|
---|
| 392 | buf += sizeof(uint32_t);
|
---|
| 393 | }
|
---|
| 394 |
|
---|
| 395 | #endif /* of #ifdef LCP_CFG_MAGIC */
|
---|
| 396 |
|
---|
| 397 | #ifdef LCP_CFG_PAP
|
---|
| 398 |
|
---|
| 399 | /* èªè¨¼ãããã³ã«ãªãã·ã§ã³ã追å ããã */
|
---|
| 400 | if (lcp_local_neg_cfg.options & LCP_CFG_PAP) {
|
---|
| 401 | *buf ++ = LCP_CIT_AUTH;
|
---|
| 402 | *buf ++ = sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 403 | *((uint16_t*)buf) = htons(PPP_PAP);
|
---|
| 404 | buf += sizeof(uint16_t);
|
---|
| 405 | }
|
---|
| 406 |
|
---|
| 407 | #endif /* of #ifdef LCP_CFG_PAP */
|
---|
| 408 |
|
---|
| 409 | #ifdef LCP_CFG_PCOMP
|
---|
| 410 |
|
---|
| 411 | /* ãããã³ã«å§ç¸®ãªãã·ã§ã³ã追å ããã */
|
---|
| 412 | if (lcp_local_neg_cfg.options & LCP_CFG_PCOMP) {
|
---|
| 413 | *buf ++ = LCP_CIT_PCOMP;
|
---|
| 414 | *buf ++ = sizeof(T_PPP_CI_HDR);
|
---|
| 415 | }
|
---|
| 416 |
|
---|
| 417 | #endif /* of #ifdef LCP_CFG_PCOMP */
|
---|
| 418 |
|
---|
| 419 | #ifdef LCP_CFG_ACCOMP
|
---|
| 420 |
|
---|
| 421 | /* ã¢ãã¬ã¹ã»å¶å¾¡å§ç¸®ãªãã·ã§ã³ã追å ããã */
|
---|
| 422 | if (lcp_local_neg_cfg.options & LCP_CFG_ACCOMP) {
|
---|
| 423 | *buf ++ = LCP_CIT_ACCOMP;
|
---|
| 424 | *buf ++ = sizeof(T_PPP_CI_HDR);
|
---|
| 425 | }
|
---|
| 426 |
|
---|
| 427 | #endif /* of #ifdef LCP_CFG_ACCOMP */
|
---|
| 428 | }
|
---|
| 429 |
|
---|
| 430 | /*
|
---|
| 431 | * lcp_ackci -- ACK ãåä¿¡ããã¨ãã®å¦ç
|
---|
| 432 | *
|
---|
| 433 | * æ»ãå¤: TURE ACK ã¯æ£å¸¸
|
---|
| 434 | * false ACK ã¯ç°å¸¸
|
---|
| 435 | */
|
---|
| 436 |
|
---|
| 437 | static bool_t
|
---|
| 438 | lcp_ackci (T_PPP_FSM *fsm, T_NET_BUF *input)
|
---|
| 439 | {
|
---|
| 440 | uint8_t *buf;
|
---|
| 441 | uint16_t len;
|
---|
| 442 |
|
---|
| 443 | buf = input->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR);
|
---|
| 444 | len = input->len - (sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
|
---|
| 445 |
|
---|
| 446 | /*
|
---|
| 447 | * æ§ææ
|
---|
| 448 | å ±ã¯éä¿¡ããé ã«å®å
|
---|
| 449 | ¨ã«ä¸è´ããªããã°ãªããªãã
|
---|
| 450 | * å¾ã£ã¦ãlcp_addci ã§ä½æããé ã«è§£æããã
|
---|
| 451 | */
|
---|
| 452 |
|
---|
| 453 | /* MRU ãªãã·ã§ã³ã解æããã */
|
---|
| 454 | if (lcp_local_neg_cfg.options & LCP_CFG_MRU) {
|
---|
| 455 | if (len < sizeof(T_PPP_CI_HDR) + sizeof(uint16_t) ||
|
---|
| 456 | *buf ++ != LCP_CIT_MRU ||
|
---|
| 457 | *buf ++ != sizeof(T_PPP_CI_HDR) + sizeof(uint16_t)||
|
---|
| 458 | *((uint16_t*)buf) != htons(lcp_local_neg_cfg.MRU) )
|
---|
| 459 | return false;
|
---|
| 460 | buf += sizeof(uint16_t);
|
---|
| 461 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 462 | }
|
---|
| 463 |
|
---|
| 464 | /* ACCM ãªãã·ã§ã³ã解æããã */
|
---|
| 465 | if (lcp_local_neg_cfg.options & LCP_CFG_ACCM) {
|
---|
| 466 | if (len < sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) ||
|
---|
| 467 | *buf ++ != LCP_CIT_ACCM ||
|
---|
| 468 | *buf ++ != sizeof(T_PPP_CI_HDR) + sizeof(uint32_t)||
|
---|
| 469 | nahcmpl(buf, lcp_local_neg_cfg.ACCM) )
|
---|
| 470 | return false;
|
---|
| 471 | buf += sizeof(uint32_t);
|
---|
| 472 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 473 | }
|
---|
| 474 |
|
---|
| 475 | #ifdef LCP_CFG_MAGIC
|
---|
| 476 |
|
---|
| 477 | /* Magic Number ãªãã·ã§ã³ã解æããã */
|
---|
| 478 | if (lcp_local_neg_cfg.options & LCP_CFG_MAGIC) {
|
---|
| 479 | if (len < sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) ||
|
---|
| 480 | *buf ++ != LCP_CIT_MAGIC ||
|
---|
| 481 | *buf ++ != sizeof(T_PPP_CI_HDR) + sizeof(uint32_t)||
|
---|
| 482 | nahcmpl(buf, lcp_local_neg_cfg.magic) )
|
---|
| 483 | return false;
|
---|
| 484 | buf += sizeof(uint32_t);
|
---|
| 485 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 486 | }
|
---|
| 487 |
|
---|
| 488 | #endif /* of #ifdef LCP_CFG_MAGIC */
|
---|
| 489 |
|
---|
| 490 | #ifdef LCP_CFG_PAP
|
---|
| 491 |
|
---|
| 492 | /* èªè¨¼ãããã³ã«ãªãã·ã§ã³ã解æããã */
|
---|
| 493 | if (lcp_local_neg_cfg.options & LCP_CFG_PAP) {
|
---|
| 494 | if (len < sizeof(T_PPP_CI_HDR) + sizeof(uint16_t) ||
|
---|
| 495 | *buf ++ != LCP_CIT_AUTH ||
|
---|
| 496 | *buf ++ != sizeof(T_PPP_CI_HDR) + sizeof(uint16_t)||
|
---|
| 497 | *((uint16_t*)buf) != htons(PPP_PAP) )
|
---|
| 498 | return false;
|
---|
| 499 | buf += sizeof(uint16_t);
|
---|
| 500 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 501 | }
|
---|
| 502 |
|
---|
| 503 | #endif /* of #ifdef LCP_CFG_PAP */
|
---|
| 504 |
|
---|
| 505 | #ifdef LCP_CFG_PCOMP
|
---|
| 506 |
|
---|
| 507 | /* ãããã³ã«å§ç¸®ãªãã·ã§ã³ã解æããã */
|
---|
| 508 | if (lcp_local_neg_cfg.options & LCP_CFG_PCOMP) {
|
---|
| 509 | if (len < sizeof(T_PPP_CI_HDR) ||
|
---|
| 510 | *buf ++ != LCP_CIT_PCOMP ||
|
---|
| 511 | *buf ++ != sizeof(T_PPP_CI_HDR))
|
---|
| 512 | return false;
|
---|
| 513 | len -= sizeof(T_PPP_CI_HDR);
|
---|
| 514 | }
|
---|
| 515 |
|
---|
| 516 | #endif /* of #ifdef LCP_CFG_PCOMP */
|
---|
| 517 |
|
---|
| 518 | #ifdef LCP_CFG_ACCOMP
|
---|
| 519 |
|
---|
| 520 | /* ã¢ãã¬ã¹ã»å¶å¾¡å§ç¸®ãªãã·ã§ã³ã解æããã */
|
---|
| 521 | if (lcp_local_neg_cfg.options & LCP_CFG_ACCOMP) {
|
---|
| 522 | if (len < sizeof(T_PPP_CI_HDR) ||
|
---|
| 523 | *buf ++ != LCP_CIT_ACCOMP ||
|
---|
| 524 | *buf ++ != sizeof(T_PPP_CI_HDR))
|
---|
| 525 | return false;
|
---|
| 526 | len -= sizeof(T_PPP_CI_HDR);
|
---|
| 527 | }
|
---|
| 528 |
|
---|
| 529 | #endif /* of #ifdef LCP_CFG_ACCOMP */
|
---|
| 530 | return true;
|
---|
| 531 | }
|
---|
| 532 |
|
---|
| 533 | /*
|
---|
| 534 | * lcp_nakci -- NAK ãåä¿¡ããã¨ãã®å¦ç
|
---|
| 535 | *
|
---|
| 536 | * æ»ãå¤: 1 NAK ã¯æ£å¸¸
|
---|
| 537 | * 0 NAK ã¯ç°å¸¸
|
---|
| 538 | */
|
---|
| 539 |
|
---|
| 540 | static int_t
|
---|
| 541 | lcp_nakci (T_PPP_FSM *fsm, T_NET_BUF *input)
|
---|
| 542 | {
|
---|
| 543 | T_LCP_CONFIGS new_cfg;
|
---|
| 544 | bool_t loop = false; /* ã«ã¼ãããã¯ããã§ã㯠*/
|
---|
| 545 | uint32_t cilong;
|
---|
| 546 | uint16_t cishort, len;
|
---|
| 547 | uint8_t *buf, cilen;
|
---|
| 548 |
|
---|
| 549 | buf = input->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR);
|
---|
| 550 | len = input->len - (sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
|
---|
| 551 |
|
---|
| 552 | new_cfg = lcp_local_neg_cfg;
|
---|
| 553 |
|
---|
| 554 | /* MRU ãªãã·ã§ã³ã解æããã */
|
---|
| 555 | if (len >= sizeof(T_PPP_CI_HDR) + sizeof(uint16_t) &&
|
---|
| 556 | * buf == LCP_CIT_MRU &&
|
---|
| 557 | *(buf + 1) == sizeof(T_PPP_CI_HDR) + sizeof(uint16_t) &&
|
---|
| 558 | (lcp_local_neg_cfg.options & LCP_CFG_MRU)) {
|
---|
| 559 | cishort = ntohs(*((uint16_t*)(buf + 2)));
|
---|
| 560 | buf += sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 561 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 562 | if (cishort <= lcp_local_neg_cfg.MRU || cishort <= DEF_PPP_MTU)
|
---|
| 563 | new_cfg.MRU = cishort;
|
---|
| 564 | }
|
---|
| 565 |
|
---|
| 566 | /* ACCM ãªãã·ã§ã³ã解æããã */
|
---|
| 567 | if (len >= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) &&
|
---|
| 568 | * buf == LCP_CIT_ACCM &&
|
---|
| 569 | *(buf + 1) == sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) &&
|
---|
| 570 | (lcp_local_neg_cfg.options & LCP_CFG_ACCM)) {
|
---|
| 571 | ntoahl(cilong, buf + 2);
|
---|
| 572 | buf += sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 573 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 574 | new_cfg.ACCM |= cilong;
|
---|
| 575 | }
|
---|
| 576 |
|
---|
| 577 | #ifdef LCP_CFG_MAGIC
|
---|
| 578 |
|
---|
| 579 | /* Magic Number ãªãã·ã§ã³ã解æããã */
|
---|
| 580 | if (len >= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) &&
|
---|
| 581 | * buf == LCP_CIT_MAGIC &&
|
---|
| 582 | *(buf + 1) == sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) &&
|
---|
| 583 | (lcp_local_neg_cfg.options & LCP_CFG_MAGIC)) {
|
---|
| 584 | ntoahl(cilong, buf + 2);
|
---|
| 585 | buf += sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 586 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 587 | new_cfg.magic = cilong;
|
---|
| 588 | loop = true;
|
---|
| 589 | }
|
---|
| 590 |
|
---|
| 591 | #endif /* of #ifdef LCP_CFG_MAGIC */
|
---|
| 592 |
|
---|
| 593 | #ifdef LCP_CFG_PAP
|
---|
| 594 |
|
---|
| 595 | /* èªè¨¼ãããã³ã«ãªãã·ã§ã³ã解æããã */
|
---|
| 596 | if (len >= sizeof(T_PPP_CI_HDR) + sizeof(uint16_t) &&
|
---|
| 597 | * buf == LCP_CIT_AUTH &&
|
---|
| 598 | *(buf + 1) == sizeof(T_PPP_CI_HDR) + sizeof(uint16_t) &&
|
---|
| 599 | (lcp_local_neg_cfg.options & LCP_CFG_PAP)) {
|
---|
| 600 | cishort = ntohs(*((uint16_t*)(buf + 2)));
|
---|
| 601 | buf += sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 602 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 603 | if (cishort == PPP_PAP)
|
---|
| 604 | new_cfg.options &= ~LCP_CFG_PAP;
|
---|
| 605 | else
|
---|
| 606 | return 0;
|
---|
| 607 | }
|
---|
| 608 |
|
---|
| 609 | #endif /* of #ifdef LCP_CFG_PAP */
|
---|
| 610 |
|
---|
| 611 | #ifdef LCP_CFG_PCOMP
|
---|
| 612 |
|
---|
| 613 | /* ãããã³ã«å§ç¸®ãªãã·ã§ã³ã解æããã */
|
---|
| 614 | if (len >= sizeof(T_PPP_CI_HDR) &&
|
---|
| 615 | * buf == LCP_CIT_PCOMP &&
|
---|
| 616 | *(buf + 1) == sizeof(T_PPP_CI_HDR) &&
|
---|
| 617 | (lcp_local_neg_cfg.options & LCP_CFG_PCOMP)) {
|
---|
| 618 | buf += sizeof(T_PPP_CI_HDR);
|
---|
| 619 | len -= sizeof(T_PPP_CI_HDR);
|
---|
| 620 | new_cfg.options &= ~LCP_CFG_PCOMP;
|
---|
| 621 | }
|
---|
| 622 |
|
---|
| 623 | #endif /* of #ifdef LCP_CFG_PCOMP */
|
---|
| 624 |
|
---|
| 625 | #ifdef LCP_CFG_ACCOMP
|
---|
| 626 |
|
---|
| 627 | /* ã¢ãã¬ã¹ã»å¶å¾¡å§ç¸®ãªãã·ã§ã³ã解æããã */
|
---|
| 628 | if (len >= sizeof(T_PPP_CI_HDR) &&
|
---|
| 629 | * buf == LCP_CIT_ACCOMP &&
|
---|
| 630 | *(buf + 1) == sizeof(T_PPP_CI_HDR) &&
|
---|
| 631 | (lcp_local_neg_cfg.options & LCP_CFG_ACCOMP)) {
|
---|
| 632 | buf += sizeof(T_PPP_CI_HDR);
|
---|
| 633 | len -= sizeof(T_PPP_CI_HDR);
|
---|
| 634 | new_cfg.options &= ~LCP_CFG_ACCOMP;
|
---|
| 635 | }
|
---|
| 636 |
|
---|
| 637 | #endif /* of #ifdef LCP_CFG_ACCOMP */
|
---|
| 638 |
|
---|
| 639 | /* å¾ã¯ç¡è¦ããã*/
|
---|
| 640 | while (len > sizeof(T_PPP_CI_HDR)) {
|
---|
| 641 | cilen = *(buf + 1);
|
---|
| 642 | if (len < cilen)
|
---|
| 643 | return 0;
|
---|
| 644 | buf += cilen;
|
---|
| 645 | len -= cilen;
|
---|
| 646 | }
|
---|
| 647 |
|
---|
| 648 | /* é·ãã 0 ã§ãªããã°ã¨ã©ã¼ */
|
---|
| 649 | if (len != 0)
|
---|
| 650 | return 0;
|
---|
| 651 |
|
---|
| 652 | /* æ°ãããªãã·ã§ã³ãè¨å®ããã*/
|
---|
| 653 | if (fsm->state != PPP_FSM_OPENED) {
|
---|
| 654 | if (loop) {
|
---|
| 655 | syslog(LOG_WARNING, "[PPP/LCP] line looped.");
|
---|
| 656 | lcp_close();
|
---|
| 657 | }
|
---|
| 658 | lcp_local_neg_cfg = new_cfg;
|
---|
| 659 | }
|
---|
| 660 | return 1;
|
---|
| 661 | }
|
---|
| 662 |
|
---|
| 663 | /*
|
---|
| 664 | * lcp_rejci -- REJ ãåä¿¡ããã¨ãã®å¦ç
|
---|
| 665 | *
|
---|
| 666 | * æ»ãå¤: 1 REJ ã¯æ£å¸¸
|
---|
| 667 | * 0 REJ ã¯ç°å¸¸
|
---|
| 668 | */
|
---|
| 669 |
|
---|
| 670 | static int_t
|
---|
| 671 | lcp_rejci (T_PPP_FSM *fsm, T_NET_BUF *input)
|
---|
| 672 | {
|
---|
| 673 | T_LCP_CONFIGS new_cfg;
|
---|
| 674 | uint32_t cilong;
|
---|
| 675 | uint16_t cishort, len;
|
---|
| 676 | uint8_t *buf;
|
---|
| 677 |
|
---|
| 678 | buf = input->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR);
|
---|
| 679 | len = input->len - (sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
|
---|
| 680 |
|
---|
| 681 | new_cfg = lcp_local_neg_cfg;
|
---|
| 682 |
|
---|
| 683 | /* MRU ãªãã·ã§ã³ã解æããã */
|
---|
| 684 | if (len >= sizeof(T_PPP_CI_HDR) + sizeof(uint16_t) &&
|
---|
| 685 | * buf == LCP_CIT_MRU &&
|
---|
| 686 | *(buf + 1) == sizeof(T_PPP_CI_HDR) + sizeof(uint16_t) &&
|
---|
| 687 | (lcp_local_neg_cfg.options & LCP_CFG_MRU)) {
|
---|
| 688 | cishort = ntohs(*((uint16_t*)(buf + 2)));
|
---|
| 689 | buf += sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 690 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 691 | if (cishort != lcp_local_neg_cfg.MRU)
|
---|
| 692 | return 0;
|
---|
| 693 | else
|
---|
| 694 | new_cfg.options &= ~LCP_CFG_MRU;
|
---|
| 695 | }
|
---|
| 696 |
|
---|
| 697 | /* ACCM ãªãã·ã§ã³ã解æããã */
|
---|
| 698 | if (len >= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) &&
|
---|
| 699 | * buf == LCP_CIT_ACCM &&
|
---|
| 700 | *(buf + 1) == sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) &&
|
---|
| 701 | (lcp_local_neg_cfg.options & LCP_CFG_ACCM)) {
|
---|
| 702 | ntoahl(cilong, buf + 2);
|
---|
| 703 | buf += sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 704 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 705 | if (cilong != lcp_local_neg_cfg.ACCM)
|
---|
| 706 | return 0;
|
---|
| 707 | else
|
---|
| 708 | new_cfg.options &= ~LCP_CFG_ACCM;
|
---|
| 709 | }
|
---|
| 710 |
|
---|
| 711 | #ifdef LCP_CFG_MAGIC
|
---|
| 712 |
|
---|
| 713 | /* Magic Number ãªãã·ã§ã³ã解æããã */
|
---|
| 714 | if (len >= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) &&
|
---|
| 715 | * buf == LCP_CIT_MAGIC &&
|
---|
| 716 | *(buf + 1) == sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) &&
|
---|
| 717 | (lcp_local_neg_cfg.options & LCP_CFG_MAGIC)) {
|
---|
| 718 | ntoahl(cilong, buf + 2);
|
---|
| 719 | buf += sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 720 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 721 | if (cilong != lcp_local_neg_cfg.magic)
|
---|
| 722 | return 0;
|
---|
| 723 | else
|
---|
| 724 | new_cfg.options &= ~LCP_CFG_MAGIC;
|
---|
| 725 | }
|
---|
| 726 |
|
---|
| 727 | #endif /* of #ifdef LCP_CFG_MAGIC */
|
---|
| 728 |
|
---|
| 729 | #ifdef LCP_CFG_PAP
|
---|
| 730 |
|
---|
| 731 | /* èªè¨¼ãããã³ã«ãªãã·ã§ã³ã解æããã */
|
---|
| 732 | if (len >= sizeof(T_PPP_CI_HDR) + sizeof(uint16_t) &&
|
---|
| 733 | * buf == LCP_CIT_AUTH &&
|
---|
| 734 | *(buf + 1) == sizeof(T_PPP_CI_HDR) + sizeof(uint16_t) &&
|
---|
| 735 | (lcp_local_neg_cfg.options & LCP_CFG_PAP)) {
|
---|
| 736 | cishort = ntohs(*((uint16_t*)(buf + 2)));
|
---|
| 737 | buf += sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 738 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 739 | if (cishort != PPP_PAP)
|
---|
| 740 | return 0;
|
---|
| 741 | else
|
---|
| 742 | new_cfg.options &= ~LCP_CFG_PAP;
|
---|
| 743 | }
|
---|
| 744 |
|
---|
| 745 | #endif /* of #ifdef LCP_CFG_PAP */
|
---|
| 746 |
|
---|
| 747 | #ifdef LCP_CFG_PCOMP
|
---|
| 748 |
|
---|
| 749 | /* ãããã³ã«å§ç¸®ãªãã·ã§ã³ã解æããã */
|
---|
| 750 | if (len >= sizeof(T_PPP_CI_HDR) &&
|
---|
| 751 | * buf == LCP_CIT_PCOMP &&
|
---|
| 752 | *(buf + 1) == sizeof(T_PPP_CI_HDR) &&
|
---|
| 753 | (lcp_local_neg_cfg.options & LCP_CFG_PCOMP)) {
|
---|
| 754 | buf += sizeof(T_PPP_CI_HDR);
|
---|
| 755 | len -= sizeof(T_PPP_CI_HDR);
|
---|
| 756 | new_cfg.options &= ~LCP_CFG_PCOMP;
|
---|
| 757 | }
|
---|
| 758 |
|
---|
| 759 | #endif /* of #ifdef LCP_CFG_PCOMP */
|
---|
| 760 |
|
---|
| 761 | #ifdef LCP_CFG_ACCOMP
|
---|
| 762 |
|
---|
| 763 | /* ã¢ãã¬ã¹ã»å¶å¾¡å§ç¸®ãªãã·ã§ã³ã解æããã */
|
---|
| 764 | if (len >= sizeof(T_PPP_CI_HDR) &&
|
---|
| 765 | * buf == LCP_CIT_ACCOMP &&
|
---|
| 766 | *(buf + 1) == sizeof(T_PPP_CI_HDR) &&
|
---|
| 767 | (lcp_local_neg_cfg.options & LCP_CFG_ACCOMP)) {
|
---|
| 768 | buf += sizeof(T_PPP_CI_HDR);
|
---|
| 769 | len -= sizeof(T_PPP_CI_HDR);
|
---|
| 770 | new_cfg.options &= ~LCP_CFG_ACCOMP;
|
---|
| 771 | }
|
---|
| 772 |
|
---|
| 773 | #endif /* of #ifdef LCP_CFG_ACCOMP */
|
---|
| 774 |
|
---|
| 775 | /* é·ãã 0 ã§ãªããã°ã¨ã©ã¼ */
|
---|
| 776 | if (len != 0)
|
---|
| 777 | return 0;
|
---|
| 778 |
|
---|
| 779 | /* æ°ãããªãã·ã§ã³ãè¨å®ããã*/
|
---|
| 780 | if (fsm->state != PPP_FSM_OPENED)
|
---|
| 781 | lcp_local_neg_cfg = new_cfg;
|
---|
| 782 |
|
---|
| 783 | return 1;
|
---|
| 784 | }
|
---|
| 785 |
|
---|
| 786 | /*
|
---|
| 787 | * lcp_reqci -- ç¸æã®æ§ææ
|
---|
| 788 | å ±ã解æããã
|
---|
| 789 | */
|
---|
| 790 |
|
---|
| 791 | static int_t
|
---|
| 792 | lcp_reqci (T_PPP_FSM *fsm, T_NET_BUF *input, T_NET_BUF *output)
|
---|
| 793 | {
|
---|
| 794 | #if DEF_LCP_REMOTE_CFGS & LCP_CFG_MAGIC
|
---|
| 795 |
|
---|
| 796 | uint32_t cilong;
|
---|
| 797 |
|
---|
| 798 | #endif /* of #if DEF_LCP_REMOTE_CFGS & LCP_CFG_MAGIC */
|
---|
| 799 |
|
---|
| 800 | uint16_t code, final, len, cilen, cishort;
|
---|
| 801 | uint8_t *np, *rp, *ap, *cp, type = 0;
|
---|
| 802 |
|
---|
| 803 | rp = ap = input->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR);
|
---|
| 804 | /* rp: REJãap: ACK ãã CI ã®ãã¤ã³ã¿ */
|
---|
| 805 | /* æå¦ããå ´åã¯ãå¼æ° input ã«ä¸æ¸ãããã */
|
---|
| 806 | len = input->len - (sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
|
---|
| 807 | np = output->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR);
|
---|
| 808 | final = PPP_CONFACK; /* æçµçã«éä¿¡ããã³ã¼ã */
|
---|
| 809 | while (len > 0) {
|
---|
| 810 | code = PPP_CONFACK;
|
---|
| 811 | cp = ap; /* cp: ç¾å¨å¦çä¸ã® CI */
|
---|
| 812 |
|
---|
| 813 | if (len < sizeof(T_PPP_CI_HDR)) {
|
---|
| 814 |
|
---|
| 815 | /* æ®ãã CI ãããããçã */
|
---|
| 816 | syslog(LOG_WARNING, "[PPP/LCP] bad CI len: %d.", len);
|
---|
| 817 | cilen = len; /* ãã¼ã¿é·ãç°å¸¸ã®å ´åã®å¦ç½® */
|
---|
| 818 | len = 0; /* ã«ã¼ãããæããã */
|
---|
| 819 | code = PPP_CONFREJ;
|
---|
| 820 | goto endswitch;
|
---|
| 821 | }
|
---|
| 822 |
|
---|
| 823 | type = *ap ++; /* CI ã®å */
|
---|
| 824 | cilen = *ap ++; /* CI ã®é·ã */
|
---|
| 825 | if (len < cilen) {
|
---|
| 826 |
|
---|
| 827 | /* æ®ãã CI é·ããçã */
|
---|
| 828 | syslog(LOG_WARNING, "[PPP/LCP] bad CI len: %d.", cilen);
|
---|
| 829 | cilen = len; /* ãã¼ã¿é·ãç°å¸¸ã®å ´åã®å¦ç½® */
|
---|
| 830 | len = 0; /* ã«ã¼ãããæããã */
|
---|
| 831 | code = PPP_CONFREJ;
|
---|
| 832 | goto endswitch;
|
---|
| 833 | }
|
---|
| 834 | len -= sizeof(T_PPP_CI_HDR);
|
---|
| 835 |
|
---|
| 836 | /* CI ã®åã«ããåå²ããã*/
|
---|
| 837 | switch (type) {
|
---|
| 838 |
|
---|
| 839 | case LCP_CIT_MRU: /* æ大åä¿¡é (Maximum Receive Unit) */
|
---|
| 840 |
|
---|
| 841 | #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_MRU) == 0
|
---|
| 842 |
|
---|
| 843 | code = PPP_CONFREJ;
|
---|
| 844 |
|
---|
| 845 | #else /* of #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_MRU) == 0 */
|
---|
| 846 |
|
---|
| 847 | /* CI é·ããããã + 2 ãªã¯ãããã§ãªããã° REJ */
|
---|
| 848 | if (cilen != sizeof(T_PPP_CI_HDR) + sizeof(uint16_t))
|
---|
| 849 | code = PPP_CONFREJ;
|
---|
| 850 | {
|
---|
| 851 | cishort = ntohs(*(uint16_t*)ap);
|
---|
| 852 |
|
---|
| 853 | /* æå°åä¿¡éããå°ãããã° NAK */
|
---|
| 854 | if (cishort < MIN_PPP_MTU) {
|
---|
| 855 | *np ++ = LCP_CIT_MRU;
|
---|
| 856 | *np ++ = sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 857 | *((uint16_t*)np) = htons(MIN_PPP_MTU);
|
---|
| 858 | np += sizeof(uint16_t);
|
---|
| 859 | code = PPP_CONFNAK;
|
---|
| 860 | }
|
---|
| 861 | else {
|
---|
| 862 | lcp_remote_neg_cfg.MRU = cishort;
|
---|
| 863 | lcp_remote_neg_cfg.options |= LCP_CFG_MRU;
|
---|
| 864 | }
|
---|
| 865 | }
|
---|
| 866 |
|
---|
| 867 | #endif /* of #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_MRU) == 0 */
|
---|
| 868 |
|
---|
| 869 | break;
|
---|
| 870 |
|
---|
| 871 | case LCP_CIT_ACCM: /* Async Control Character Map */
|
---|
| 872 |
|
---|
| 873 | #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_ACCM) == 0
|
---|
| 874 |
|
---|
| 875 | code = PPP_CONFREJ;
|
---|
| 876 |
|
---|
| 877 | #else /* of #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_ACCM) == 0 */
|
---|
| 878 |
|
---|
| 879 | /* CI é·ããããã + 4 ãªã¯ãããã§ãªããã° REJ */
|
---|
| 880 | if (cilen != sizeof(T_PPP_CI_HDR) + sizeof(uint32_t))
|
---|
| 881 | code = PPP_CONFREJ;
|
---|
| 882 | else {
|
---|
| 883 | ntoahl(lcp_remote_neg_cfg.ACCM, ap);
|
---|
| 884 | lcp_remote_neg_cfg.options |= LCP_CFG_ACCM;
|
---|
| 885 | }
|
---|
| 886 |
|
---|
| 887 | #endif /* of #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_ACCM) == 0 */
|
---|
| 888 |
|
---|
| 889 | break;
|
---|
| 890 |
|
---|
| 891 | case LCP_CIT_MAGIC: /* ãã¸ãã¯çªå· */
|
---|
| 892 |
|
---|
| 893 | #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_MAGIC) == 0
|
---|
| 894 |
|
---|
| 895 | code = PPP_CONFREJ;
|
---|
| 896 |
|
---|
| 897 | #else /* of #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_MAGIC) == 0 */
|
---|
| 898 |
|
---|
| 899 | /* CI é·ããããã + 4 ãªã¯ãããã§ãªããã° REJ */
|
---|
| 900 | if (cilen != sizeof(T_PPP_CI_HDR) + sizeof(uint32_t))
|
---|
| 901 | code = PPP_CONFREJ;
|
---|
| 902 | else {
|
---|
| 903 | ntoahl(cilong, ap);
|
---|
| 904 |
|
---|
| 905 | /* çªå·ãèªåã¨åããªã NAK */
|
---|
| 906 | if (cilong == lcp_local_neg_cfg.magic) {
|
---|
| 907 | cilong = net_rand();
|
---|
| 908 | *np ++ = LCP_CIT_MAGIC;
|
---|
| 909 | *np ++ = sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 910 | ahtonl(np, cilong);
|
---|
| 911 | np += sizeof(uint32_t);
|
---|
| 912 | code = PPP_CONFNAK;
|
---|
| 913 | }
|
---|
| 914 | else {
|
---|
| 915 | lcp_remote_neg_cfg.magic = cilong;
|
---|
| 916 | lcp_remote_neg_cfg.options |= LCP_CFG_MAGIC;
|
---|
| 917 | }
|
---|
| 918 | }
|
---|
| 919 |
|
---|
| 920 | #endif /* of #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_MAGIC) == 0 */
|
---|
| 921 |
|
---|
| 922 | break;
|
---|
| 923 |
|
---|
| 924 | #ifdef LCP_CFG_PAP
|
---|
| 925 | /* CHAP ã¯å®è£
|
---|
| 926 | äºå® */
|
---|
| 927 |
|
---|
| 928 | case LCP_CIT_AUTH: /* èªè¨¼ãããã³ã« */
|
---|
| 929 |
|
---|
| 930 | /* CI é·ããããã + 2 ãªã¯ãããããçãã¨ãã¯ã¨ã©ã¼ */
|
---|
| 931 | if (cilen < sizeof(T_PPP_CI_HDR) + sizeof(uint16_t))
|
---|
| 932 | code = PPP_CONFREJ;
|
---|
| 933 | else {
|
---|
| 934 | cishort = ntohs(*(uint16_t*)ap);
|
---|
| 935 |
|
---|
| 936 | /* èªè¨¼ãããã³ã«ã«ããåå²ãã */
|
---|
| 937 | if (cishort == PPP_PAP &&
|
---|
| 938 | cilen == sizeof(T_PPP_CI_HDR) + sizeof(uint16_t) &&
|
---|
| 939 | (DEF_LCP_REMOTE_CFGS & LCP_CFG_PAP) != 0)
|
---|
| 940 | lcp_remote_neg_cfg.options |= LCP_CFG_PAP;
|
---|
| 941 | else
|
---|
| 942 | code = PPP_CONFREJ;
|
---|
| 943 | }
|
---|
| 944 | break;
|
---|
| 945 |
|
---|
| 946 | #endif /* of #ifdef LCP_CFG_PAP */
|
---|
| 947 |
|
---|
| 948 | #ifdef LCP_CFG_PCOMP
|
---|
| 949 |
|
---|
| 950 | case LCP_CIT_PCOMP: /* ãããã³ã«é¨å§ç¸®ã¯å®è£
|
---|
| 951 | äºå® */
|
---|
| 952 |
|
---|
| 953 | #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_PCOMP) == 0
|
---|
| 954 |
|
---|
| 955 | code = PPP_CONFREJ;
|
---|
| 956 |
|
---|
| 957 | #else /* of #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_PCOMP) == 0 */
|
---|
| 958 |
|
---|
| 959 | /* CI é·ãããããé·ã ãã§ãªããã° REJ */
|
---|
| 960 | if (cilen != sizeof(T_PPP_CI_HDR))
|
---|
| 961 | code = PPP_CONFREJ;
|
---|
| 962 | else
|
---|
| 963 | lcp_remote_neg_cfg.options |= LCP_CFG_PCOMP;
|
---|
| 964 |
|
---|
| 965 | #endif /* of #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_PCOMP) == 0 */
|
---|
| 966 |
|
---|
| 967 | break;
|
---|
| 968 |
|
---|
| 969 | #endif /* of #ifdef LCP_CFG_PCOMP */
|
---|
| 970 |
|
---|
| 971 | #ifdef LCP_CFG_ACCOMP
|
---|
| 972 |
|
---|
| 973 | case LCP_CIT_ACCOMP: /* ã¢ãã¬ã¹ã»å¶å¾¡é¨å§ç¸® */
|
---|
| 974 |
|
---|
| 975 | #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_ACCOMP) == 0
|
---|
| 976 |
|
---|
| 977 | code = PPP_CONFREJ;
|
---|
| 978 |
|
---|
| 979 | #else /* of #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_ACCOMP) == 0 */
|
---|
| 980 |
|
---|
| 981 | /* CI é·ãããããé·ã ãã§ãªããã° REJ */
|
---|
| 982 | if (cilen != sizeof(T_PPP_CI_HDR))
|
---|
| 983 | code = PPP_CONFREJ;
|
---|
| 984 | else
|
---|
| 985 | lcp_remote_neg_cfg.options |= LCP_CFG_ACCOMP;
|
---|
| 986 |
|
---|
| 987 | #endif /* of #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_ACCOMP) == 0 */
|
---|
| 988 |
|
---|
| 989 | break;
|
---|
| 990 |
|
---|
| 991 | #endif /* of #ifdef LCP_CFG_ACCOMP */
|
---|
| 992 |
|
---|
| 993 | default:
|
---|
| 994 | syslog(LOG_WARNING, "[PPP/LCP] unexp opt: %d.", type);
|
---|
| 995 | code = PPP_CONFREJ;
|
---|
| 996 | break;
|
---|
| 997 | }
|
---|
| 998 | endswitch:
|
---|
| 999 | if (code == PPP_CONFNAK) {
|
---|
| 1000 | /* CI ã®åã Magic Number ã®å ´åãé¤ãã¦ãNAK ã®åæ°ã */
|
---|
| 1001 | /* æå¤§å¤ MAX_PPP_FAILURES ãè¶
|
---|
| 1002 | ãããæå¦ããã */
|
---|
| 1003 | if (fsm->failures >= MAX_PPP_FAILURES && type != LCP_CIT_MAGIC)
|
---|
| 1004 | code = PPP_CONFREJ;
|
---|
| 1005 | else if (final != PPP_CONFREJ)
|
---|
| 1006 | final = PPP_CONFNAK;
|
---|
| 1007 | }
|
---|
| 1008 |
|
---|
| 1009 | /* ãã® CI ãæå¦ãã */
|
---|
| 1010 | if (code == PPP_CONFREJ) {
|
---|
| 1011 | if (rp < cp) /* åã«è©°ããã*/
|
---|
| 1012 | memcpy(rp, cp, cilen);
|
---|
| 1013 | rp += cilen;
|
---|
| 1014 | final = PPP_CONFREJ;
|
---|
| 1015 | }
|
---|
| 1016 |
|
---|
| 1017 | ap += cilen - sizeof(T_PPP_CI_HDR);
|
---|
| 1018 | len -= cilen - sizeof(T_PPP_CI_HDR);
|
---|
| 1019 | }
|
---|
| 1020 |
|
---|
| 1021 | /* æçµçãªé·ãã調æ´ããã*/
|
---|
| 1022 | switch (final) {
|
---|
| 1023 | case PPP_CONFNAK:
|
---|
| 1024 | output->len = np - output->buf;
|
---|
| 1025 | memcpy(output->buf, input->buf, sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
|
---|
| 1026 | break;
|
---|
| 1027 | case PPP_CONFREJ:
|
---|
| 1028 | memcpy(output->buf, input->buf, output->len = rp - input->buf);
|
---|
| 1029 | break;
|
---|
| 1030 | case PPP_CONFACK:
|
---|
| 1031 | memcpy(output->buf, input->buf, input->len);
|
---|
| 1032 | break;
|
---|
| 1033 | }
|
---|
| 1034 | return final;
|
---|
| 1035 | }
|
---|
| 1036 |
|
---|
| 1037 | /*
|
---|
| 1038 | * lcp_up -- ãªã³ã¯æ¥ç¶ã確ç«ãã (Phase: Establish ã«ç§»è¡ãã)ã
|
---|
| 1039 | */
|
---|
| 1040 |
|
---|
| 1041 | static void
|
---|
| 1042 | lcp_up (T_PPP_FSM *fsm)
|
---|
| 1043 | {
|
---|
| 1044 | /* èªæ§ææ
|
---|
| 1045 | å ±ã®è¨å® */
|
---|
| 1046 | lcp_local_ack_cfg = lcp_local_neg_cfg;
|
---|
| 1047 |
|
---|
| 1048 | /* ç¸æã®æ§ææ
|
---|
| 1049 | å ±ã®è¨å® */
|
---|
| 1050 | lcp_remote_ack_cfg = lcp_remote_neg_cfg;
|
---|
| 1051 |
|
---|
| 1052 | #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC
|
---|
| 1053 |
|
---|
| 1054 | echo_lowerup();
|
---|
| 1055 |
|
---|
| 1056 | #endif /* of #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC */
|
---|
| 1057 |
|
---|
| 1058 | link_established();
|
---|
| 1059 | }
|
---|
| 1060 |
|
---|
| 1061 | /*
|
---|
| 1062 | * lcp_starting -- ä¸ä½å±¤ãéå§ããã
|
---|
| 1063 | */
|
---|
| 1064 |
|
---|
| 1065 | static void
|
---|
| 1066 | lcp_starting (T_PPP_FSM *fsm)
|
---|
| 1067 | {
|
---|
| 1068 | link_required();
|
---|
| 1069 | }
|
---|
| 1070 |
|
---|
| 1071 | /*
|
---|
| 1072 | * lcp_extcode -- LCP ç¹æã® CP ãåä¿¡ããã¨ãã®å¦ç
|
---|
| 1073 | */
|
---|
| 1074 |
|
---|
| 1075 | static bool_t
|
---|
| 1076 | lcp_extcode (T_PPP_FSM *fsm, uint8_t code, uint8_t id, T_NET_BUF *input)
|
---|
| 1077 | {
|
---|
| 1078 | #if DEF_LCP_REMOTE_CFGS & LCP_CFG_MAGIC
|
---|
| 1079 |
|
---|
| 1080 | T_NET_BUF *output;
|
---|
| 1081 |
|
---|
| 1082 | #endif /* of #if DEF_LCP_REMOTE_CFGS & LCP_CFG_MAGIC */
|
---|
| 1083 |
|
---|
| 1084 | switch (code) {
|
---|
| 1085 | case PPP_PROTREJ:
|
---|
| 1086 | lcp_rprotrej(fsm, input);
|
---|
| 1087 | break;
|
---|
| 1088 |
|
---|
| 1089 | case PPP_ECHOREQ:
|
---|
| 1090 |
|
---|
| 1091 | #if DEF_LCP_REMOTE_CFGS & LCP_CFG_MAGIC
|
---|
| 1092 |
|
---|
| 1093 | if (fsm->state == PPP_FSM_OPENED) {
|
---|
| 1094 | syscall(get_net_buf(&output, sizeof(T_PPP_HDR)
|
---|
| 1095 | + sizeof(T_PPP_CP_HDR)
|
---|
| 1096 | + sizeof(uint32_t)));
|
---|
| 1097 | *(uint32_t*)(output->buf + sizeof(T_PPP_HDR)
|
---|
| 1098 | + sizeof(T_PPP_CP_HDR)) = lcp_local_ack_cfg.magic;
|
---|
| 1099 | IF_SET_PROTO(output, PPP_LCP);
|
---|
| 1100 | ppp_cp_output(PPP_ECHOREP, id, output);
|
---|
| 1101 | }
|
---|
| 1102 |
|
---|
| 1103 | #endif /* of #if DEF_LCP_REMOTE_CFGS & LCP_CFG_MAGIC */
|
---|
| 1104 |
|
---|
| 1105 | break;
|
---|
| 1106 |
|
---|
| 1107 | case PPP_ECHOREP:
|
---|
| 1108 |
|
---|
| 1109 | #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC
|
---|
| 1110 |
|
---|
| 1111 | recv_echo_rep(fsm, id, input);
|
---|
| 1112 |
|
---|
| 1113 | #endif /* of #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC */
|
---|
| 1114 |
|
---|
| 1115 | break;
|
---|
| 1116 |
|
---|
| 1117 | case PPP_DISCREQ:
|
---|
| 1118 | break;
|
---|
| 1119 |
|
---|
| 1120 | default:
|
---|
| 1121 | return false;
|
---|
| 1122 | break;
|
---|
| 1123 |
|
---|
| 1124 | }
|
---|
| 1125 | return true;
|
---|
| 1126 | }
|
---|
| 1127 |
|
---|
| 1128 | /*
|
---|
| 1129 | * lcp_rprotrej -- Proto-REJ ãåä¿¡ããã¨ãã®å¦ç
|
---|
| 1130 | */
|
---|
| 1131 |
|
---|
| 1132 | static void
|
---|
| 1133 | lcp_rprotrej (T_PPP_FSM *fsm, T_NET_BUF *input)
|
---|
| 1134 | {
|
---|
| 1135 | T_PPP_PROTENT *entry;
|
---|
| 1136 | int_t ix;
|
---|
| 1137 | uint16_t proto;
|
---|
| 1138 |
|
---|
| 1139 | if (input->len < sizeof(uint16_t)) {
|
---|
| 1140 | syslog(LOG_WARNING, "[PPP/LCP] bad len: %d in recv Proto-REJ.");
|
---|
| 1141 | return;
|
---|
| 1142 | }
|
---|
| 1143 |
|
---|
| 1144 | proto = ntohs(*GET_PPP_HDR(input));
|
---|
| 1145 |
|
---|
| 1146 | if (fsm->state != PPP_FSM_OPENED) {
|
---|
| 1147 | return;
|
---|
| 1148 | }
|
---|
| 1149 |
|
---|
| 1150 | /* ä¸ä½ãããã³ã«ãåæåãã */
|
---|
| 1151 | for (ix = 0; (entry = protocols[ix]) != NULL; ix ++)
|
---|
| 1152 | if (entry->proto == proto) {
|
---|
| 1153 | (*entry->protrej)();
|
---|
| 1154 | return;
|
---|
| 1155 | }
|
---|
| 1156 |
|
---|
| 1157 | syslog(LOG_WARNING, "[PPP/LCP] unexp proto: %d in recv Proto-REJ.", proto);
|
---|
| 1158 | }
|
---|
| 1159 |
|
---|
| 1160 | /*
|
---|
| 1161 | * lcp_protrej -- Proto-REJ ãåä¿¡ããã¨ãã®å¦ç
|
---|
| 1162 | */
|
---|
| 1163 |
|
---|
| 1164 | static void
|
---|
| 1165 | lcp_protrej (void)
|
---|
| 1166 | {
|
---|
| 1167 | fsm_protreject(&lcp_fsm);
|
---|
| 1168 | }
|
---|
| 1169 |
|
---|
| 1170 | /*
|
---|
| 1171 | * lcp_lowerup -- LCP ä¸ä½å±¤ãèµ·åããã
|
---|
| 1172 | */
|
---|
| 1173 |
|
---|
| 1174 | void
|
---|
| 1175 | lcp_lowerup (void)
|
---|
| 1176 | {
|
---|
| 1177 | fsm_lowerup(&lcp_fsm);
|
---|
| 1178 | }
|
---|
| 1179 |
|
---|
| 1180 | /*
|
---|
| 1181 | * lcp_lowerdown -- LCP ä¸ä½å±¤ãåæ¢ããã
|
---|
| 1182 | */
|
---|
| 1183 |
|
---|
| 1184 | void
|
---|
| 1185 | lcp_lowerdown (void)
|
---|
| 1186 | {
|
---|
| 1187 | fsm_lowerdown(&lcp_fsm);
|
---|
| 1188 | }
|
---|
| 1189 |
|
---|
| 1190 | /*
|
---|
| 1191 | * lcp_open -- LCP ã®ãªã¼ã
|
---|
| 1192 | */
|
---|
| 1193 |
|
---|
| 1194 | void
|
---|
| 1195 | lcp_open (uint8_t open_mode)
|
---|
| 1196 | {
|
---|
| 1197 | ppp_open_mode = open_mode; /* ãªã¼ãã³æã®åä½ã¢ã¼ã */
|
---|
| 1198 | fsm_open(&lcp_fsm);
|
---|
| 1199 | }
|
---|
| 1200 |
|
---|
| 1201 | /*
|
---|
| 1202 | * lcp_close -- LCP ã®ã¯ãã¼ãº
|
---|
| 1203 | */
|
---|
| 1204 |
|
---|
| 1205 | void
|
---|
| 1206 | lcp_close (void)
|
---|
| 1207 | {
|
---|
| 1208 | if (ppp_phase != PPP_PHASE_DEAD)
|
---|
| 1209 | ppp_phase = PPP_PHASE_TERMINATE;
|
---|
| 1210 |
|
---|
| 1211 | if (ppp_open_mode == PPP_OPEN_PASSIVE && lcp_fsm.state == PPP_FSM_STOPPED) {
|
---|
| 1212 | lcp_fsm.state = PPP_FSM_CLOSED;
|
---|
| 1213 | lcp_finished(&lcp_fsm);
|
---|
| 1214 | }
|
---|
| 1215 | else
|
---|
| 1216 | fsm_close(&lcp_fsm);
|
---|
| 1217 | }
|
---|
| 1218 |
|
---|
| 1219 | /*
|
---|
| 1220 | * lcp_sprotrej -- èªèã§ããªããããã³ã«ãéããã¦ããã¨ãã®å¦ç
|
---|
| 1221 | */
|
---|
| 1222 |
|
---|
| 1223 | void
|
---|
| 1224 | lcp_sprotrej (T_NET_BUF *input)
|
---|
| 1225 | {
|
---|
| 1226 | T_NET_BUF *output;
|
---|
| 1227 | /*
|
---|
| 1228 | * Protocol-Reject ãéãè¿ãã
|
---|
| 1229 | */
|
---|
| 1230 |
|
---|
| 1231 | syscall(get_net_buf(&output, input->len + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR)));
|
---|
| 1232 |
|
---|
| 1233 | memcpy(output->buf, input->buf, sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
|
---|
| 1234 | memcpy(output->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR), input->buf, input->len);
|
---|
| 1235 |
|
---|
| 1236 | IF_SET_PROTO(output, PPP_LCP);
|
---|
| 1237 | ppp_cp_output(PPP_PROTREJ, ++ lcp_fsm.id, output);
|
---|
| 1238 | }
|
---|
| 1239 |
|
---|
| 1240 | /*
|
---|
| 1241 | * lcp_down -- ãªã³ã¯æ¥ç¶ã解æ¾ãã (Phase: Dead ã«ç§»è¡ãã)ã
|
---|
| 1242 | */
|
---|
| 1243 |
|
---|
| 1244 | void
|
---|
| 1245 | lcp_down (T_PPP_FSM *fsm)
|
---|
| 1246 | {
|
---|
| 1247 |
|
---|
| 1248 | #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC
|
---|
| 1249 |
|
---|
| 1250 | echo_lowerdown();
|
---|
| 1251 |
|
---|
| 1252 | #endif /* of #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC */
|
---|
| 1253 |
|
---|
| 1254 | link_down();
|
---|
| 1255 | }
|
---|
| 1256 |
|
---|
| 1257 | /*
|
---|
| 1258 | * lcp_finished -- ä¸ä½å±¤ãçµäºããã
|
---|
| 1259 | */
|
---|
| 1260 |
|
---|
| 1261 | void
|
---|
| 1262 | lcp_finished (T_PPP_FSM *fsm)
|
---|
| 1263 | {
|
---|
| 1264 | link_terminated();
|
---|
| 1265 | }
|
---|
| 1266 |
|
---|
| 1267 | #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC
|
---|
| 1268 |
|
---|
| 1269 | /*
|
---|
| 1270 | * recv_echo_rep -- ECHOREP ãåä¿¡ããã¨ãã®å¦ç
|
---|
| 1271 | */
|
---|
| 1272 |
|
---|
| 1273 | static void
|
---|
| 1274 | recv_echo_rep(T_PPP_FSM *fsm, uint8_t id, T_NET_BUF *input)
|
---|
| 1275 | {
|
---|
| 1276 | T_PPP_CP_HDR *hdr;
|
---|
| 1277 | uint32_t magic;
|
---|
| 1278 |
|
---|
| 1279 | hdr = GET_PPP_CP_HDR(input);
|
---|
| 1280 |
|
---|
| 1281 | /* Magic Number ã®é·ã以ä¸ãªãã¨ã©ã¼ */
|
---|
| 1282 | if (hdr->len < sizeof(T_PPP_CP_HDR) + sizeof(uint32_t)) {
|
---|
| 1283 | syslog(LOG_WARNING, "[PPP/LCP] bad ECHOREP len: %d.", hdr->len);
|
---|
| 1284 | return;
|
---|
| 1285 | }
|
---|
| 1286 |
|
---|
| 1287 | ntoahl(magic, input->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
|
---|
| 1288 |
|
---|
| 1289 | /* åä¿¡ãã Magic Number ãèªåã¨åããªãã«ã¼ããã¦ããã*/
|
---|
| 1290 | if ((lcp_local_ack_cfg.options & LCP_CFG_MAGIC) && magic == lcp_local_ack_cfg.magic) {
|
---|
| 1291 | syslog(LOG_WARNING, "[PPP/LCP] ECHOREP looped.");
|
---|
| 1292 | return;
|
---|
| 1293 | }
|
---|
| 1294 |
|
---|
| 1295 | echo_pending = 0;
|
---|
| 1296 | }
|
---|
| 1297 |
|
---|
| 1298 | /*
|
---|
| 1299 | * echo_timeout -- ECHO REQ/REP ã®ã¿ã¤ã ã¢ã¦ãå¦ç
|
---|
| 1300 | */
|
---|
| 1301 |
|
---|
| 1302 | static void
|
---|
| 1303 | echo_timeout (void *arg)
|
---|
| 1304 | {
|
---|
| 1305 | if (timer_running) {
|
---|
| 1306 | timer_running = false;
|
---|
| 1307 | send_echo_req((T_PPP_FSM *)arg);
|
---|
| 1308 | }
|
---|
| 1309 | }
|
---|
| 1310 |
|
---|
| 1311 | /*
|
---|
| 1312 | * send_echo_req -- ECHO REQ ãéä¿¡ããã
|
---|
| 1313 | */
|
---|
| 1314 |
|
---|
| 1315 | static void
|
---|
| 1316 | send_echo_req (T_PPP_FSM *fsm)
|
---|
| 1317 | {
|
---|
| 1318 | T_NET_BUF *input;
|
---|
| 1319 |
|
---|
| 1320 | #if LCP_ECHO_FAILS > 0
|
---|
| 1321 |
|
---|
| 1322 | if (echo_pending >= LCP_ECHO_FAILS) {
|
---|
| 1323 | syslog(LOG_WARNING, "[PPP/LCP] no reply to ECHOREQ.");
|
---|
| 1324 | lcp_close();
|
---|
| 1325 | echo_pending = 0;
|
---|
| 1326 | }
|
---|
| 1327 |
|
---|
| 1328 | #endif /* of #if LCP_ECHO_FAILS > 0 */
|
---|
| 1329 |
|
---|
| 1330 | if (fsm->state == PPP_FSM_OPENED) {
|
---|
| 1331 |
|
---|
| 1332 | /* ECHOREQ ãéä¿¡ããã*/
|
---|
| 1333 | syscall(get_net_buf(&input, sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR) + sizeof(uint32_t)));
|
---|
| 1334 | *(uint32_t*)(input->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR)) = lcp_local_ack_cfg.magic;
|
---|
| 1335 | IF_SET_PROTO(input, PPP_LCP);
|
---|
| 1336 | ppp_cp_output(PPP_ECHOREQ, echo_number ++, input);
|
---|
| 1337 | echo_pending ++;
|
---|
| 1338 |
|
---|
| 1339 | /* ã¿ã¤ãã¼ãã¹ã¿ã¼ãããã*/
|
---|
| 1340 | timeout((FP)echo_timeout, fsm, LCP_ECHO_INTERVAL);
|
---|
| 1341 | timer_running = true;
|
---|
| 1342 | }
|
---|
| 1343 | }
|
---|
| 1344 |
|
---|
| 1345 | /*
|
---|
| 1346 | * echo_lowerup -- ECHO REQ/REP ã®èµ·å
|
---|
| 1347 | */
|
---|
| 1348 |
|
---|
| 1349 | static void
|
---|
| 1350 | echo_lowerup (void)
|
---|
| 1351 | {
|
---|
| 1352 | echo_pending = 0;
|
---|
| 1353 | echo_number = 0;
|
---|
| 1354 | timer_running = false;
|
---|
| 1355 |
|
---|
| 1356 | send_echo_req(&lcp_fsm);
|
---|
| 1357 | }
|
---|
| 1358 |
|
---|
| 1359 | /*
|
---|
| 1360 | * echo_lowerdown -- ECHO REQ/REP ã®åæ¢
|
---|
| 1361 | */
|
---|
| 1362 |
|
---|
| 1363 | static void
|
---|
| 1364 | echo_lowerdown (void)
|
---|
| 1365 | {
|
---|
| 1366 | if (timer_running) {
|
---|
| 1367 | untimeout((FP)echo_timeout, &lcp_fsm);
|
---|
| 1368 | timer_running = false;
|
---|
| 1369 | }
|
---|
| 1370 | }
|
---|
| 1371 |
|
---|
| 1372 | #endif /* of #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC */
|
---|
| 1373 |
|
---|
| 1374 | #endif /* fo #ifdef SUPPORT_PPP */
|
---|