[313] | 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_fsm.c 313 2017-07-23 04:50:32Z coas-nagasima $
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| 44 | */
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| 45 |
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| 46 | /*
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| 47 | * fsm->c - {Link, IP} Control Protocol Finite State Machine.
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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 Finite State Machine for LCP/IPCP
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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/fsm->c,v 1.52.2.3 2000/08/19 09:30:03 brian Exp $
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| 85 | *
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| 86 | * TODO:
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| 87 | */
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| 88 |
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| 89 | #include <string.h>
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| 90 |
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| 91 | #include <s_services.h>
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| 92 | #include <t_services.h>
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| 93 |
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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_endian.h>
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| 101 | #include <net/net_timer.h>
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| 102 | #include <net/net_buf.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_fsm.h>
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| 108 |
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| 109 | #include <netinet/in.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 | * å
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| 115 | ¨åå¤æ°
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| 116 | */
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| 117 |
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| 118 | uint8_t ppp_open_mode = PPP_OPEN_PASSIVE; /* ãªã¼ãã³æã®åä½ã¢ã¼ã */
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| 119 |
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| 120 | /*
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| 121 | * é¢æ°
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| 122 | */
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| 123 |
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| 124 | static void fsm_sconfreq (T_PPP_FSM *fsm, int_t retansmit);
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| 125 | static void fsm_rconfreq (T_PPP_FSM *fsm, uint8_t id, T_NET_BUF *input);
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| 126 | static void fsm_rconfack (T_PPP_FSM *fsm, uint8_t id, T_NET_BUF *input);
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| 127 | static void fsm_rconfnakrej (T_PPP_FSM *fsm, uint8_t code, uint8_t id, T_NET_BUF *input);
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| 128 | static void fsm_rtermreq (T_PPP_FSM *fsm, uint8_t id, T_NET_BUF *input);
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| 129 | static void fsm_rtermack (T_PPP_FSM *fsm, T_NET_BUF *input);
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| 130 | static void fsm_rcoderej (T_PPP_FSM *fsm, T_NET_BUF *input);
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| 131 | static void fsm_stermreq (T_PPP_FSM *fsm, uint8_t id);
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| 132 | static void fsm_timeout (void *arg);
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| 133 |
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| 134 | /*
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| 135 | * fsm_sconfreq -- Configure-Request ãéä¿¡ããã
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| 136 | */
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| 137 |
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| 138 | static void
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| 139 | fsm_sconfreq (T_PPP_FSM *fsm, int_t retransmit)
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| 140 | {
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| 141 | T_NET_BUF *output;
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| 142 | uint16_t len;
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| 143 |
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| 144 | if (!(fsm->state == PPP_FSM_REQSENT ||
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| 145 | fsm->state == PPP_FSM_ACKRCVD ||
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| 146 | fsm->state == PPP_FSM_ACKSENT)) {
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| 147 | /* ã¾ã ãã´ããã¦ããªãããªãã·ã§ã³ããªã»ããããã */
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| 148 | if (fsm->callbacks->resetci)
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| 149 | (*fsm->callbacks->resetci)(fsm);
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| 150 | fsm->failures = 0;
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| 151 | }
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| 152 | if (retransmit == 0) {
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| 153 | /* æ°ãããªã¯ã¨ã¹ããåéã«ã¦ã³ã¿ããªã»ããããæ°ãã ID ãè¨å®ããã */
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| 154 | fsm->retrans = MAX_PPP_CONFIGURES;
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| 155 | fsm->reqid = ++ fsm->id;
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| 156 | }
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| 157 |
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| 158 | fsm->seen_ack = 0;
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| 159 |
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| 160 | if (fsm->callbacks->cilen && fsm->callbacks->addci) {
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| 161 | /* æ§ææ
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| 162 | å ±ãã±ãããä½ãã */
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| 163 | len = (*fsm->callbacks->cilen)(fsm);
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| 164 |
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| 165 | syscall(get_net_buf(&output, len + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR)));
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| 166 | (*fsm->callbacks->addci)(fsm, output);
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| 167 |
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| 168 | /* æ§ææ
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| 169 | å ±ãã±ãããéä¿¡ããã */
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| 170 | IF_SET_PROTO(output, fsm->proto);
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| 171 | ppp_cp_output(PPP_CONFREQ, fsm->reqid, output);
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| 172 |
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| 173 | -- fsm->retrans;
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| 174 | timeout((FP)fsm_timeout, fsm, DEF_PPP_TIMEOUT);
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| 175 | }
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| 176 | }
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| 177 |
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| 178 | /*
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| 179 | * fsm_rconfreq -- Configure-Request ãåä¿¡ããã¨ãã®å¦ç
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| 180 | */
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| 181 |
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| 182 | static void
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| 183 | fsm_rconfreq (T_PPP_FSM *fsm, uint8_t id, T_NET_BUF *input)
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| 184 | {
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| 185 | T_NET_BUF *output;
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| 186 | uint16_t code;
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| 187 |
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| 188 | switch (fsm->state) {
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| 189 | case PPP_FSM_CLOSED:
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| 190 | syscall(get_net_buf(&output, sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR)));
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| 191 | memcpy(output->buf, input->buf, sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
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| 192 | ppp_cp_output(PPP_TERMACK, id, output);
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| 193 | return;
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| 194 | break;
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| 195 |
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| 196 | case PPP_FSM_CLOSING:
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| 197 | case PPP_FSM_STOPPING:
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| 198 | return;
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| 199 | break;
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| 200 |
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| 201 | case PPP_FSM_OPENED:
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| 202 | /* ä¸ä½å±¤ãåæ¢ãã¦ããã´ã«ç§»ãã */
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| 203 | if (fsm->callbacks->down != NULL)
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| 204 | (*fsm->callbacks->down)(fsm);
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| 205 | fsm_sconfreq(fsm, 0); /* æåã® Configure-Request ãéãã */
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| 206 | break;
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| 207 |
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| 208 | case PPP_FSM_STOPPED:
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| 209 | /* ç¸æãããã´ãéå§ããã */
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| 210 | fsm_sconfreq(fsm, 0); /* æåã® Configure-Request ãéãã */
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| 211 | fsm->state = PPP_FSM_REQSENT;
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| 212 | break;
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| 213 |
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| 214 | }
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| 215 |
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| 216 | syscall(get_net_buf(&output, input->len));
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| 217 |
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| 218 | /* ä¸ä½ãããã³ã«ã«è¦æ±ããã Configure-Request ãéãã */
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| 219 | if (fsm->callbacks->reqci != NULL) /* æ§ææ
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| 220 | å ±ããã§ãã¯ããã */
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| 221 | code = (*fsm->callbacks->reqci)(fsm, input, output);
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| 222 | else if (output->len > sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR))
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| 223 | code = PPP_CONFREJ;
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| 224 | else
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| 225 | code = PPP_CONFACK;
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| 226 |
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| 227 | /* ç¸æã« ACK, NAK ã¾ã㯠REJ ãéä¿¡ããã */
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| 228 | ppp_cp_output(code, id, output);
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| 229 |
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| 230 | if (code == PPP_CONFACK) {
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| 231 | if (fsm->state == PPP_FSM_ACKRCVD) {
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| 232 | untimeout((FP)fsm_timeout, fsm);
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| 233 | fsm->state = PPP_FSM_OPENED;
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| 234 | if (fsm->callbacks->up != NULL)
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| 235 | (*fsm->callbacks->up)(fsm);
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| 236 | }
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| 237 | else
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| 238 | fsm->state = PPP_FSM_ACKSENT;
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| 239 | fsm->failures = 0;
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| 240 | }
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| 241 | else {
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| 242 | /* ACK ã REJ ãéã */
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| 243 | if (fsm->state != PPP_FSM_ACKRCVD)
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| 244 | fsm->state = PPP_FSM_REQSENT;
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| 245 | if (code == PPP_CONFNAK)
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| 246 | fsm->failures ++;
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| 247 | }
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| 248 | }
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| 249 |
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| 250 | /*
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| 251 | * fsm_rconfnakrej -- Configure-NAK/REJ ãåä¿¡ããã¨ãã®å¦ç
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| 252 | */
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| 253 |
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| 254 | static void
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| 255 | fsm_rconfnakrej (T_PPP_FSM *fsm, uint8_t code, uint8_t id, T_NET_BUF *input)
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| 256 | {
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| 257 | int_t ret = 0;
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| 258 | T_NET_BUF *output;
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| 259 |
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| 260 | /* äºæãã ID ã§ãªãããNAK/REJ ãäºæãã¦ããªãã¨ãã¯çµäºããã*/
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| 261 | if (id != fsm->reqid || fsm->seen_ack) {
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| 262 | syslog(LOG_WARNING, "[PPP/FSM] bad ID or unexp NAK/REJ.");
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| 263 | return;
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| 264 | }
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| 265 |
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| 266 | if (code == PPP_CONFNAK) {
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| 267 | if (fsm->callbacks->nakci != NULL && (ret = (*fsm->callbacks->nakci)(fsm, input)) == 0) {
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| 268 | syslog(LOG_WARNING, "[PPP/FSM] bad NAK.");
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| 269 | return;
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| 270 | }
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| 271 | }
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| 272 | else {
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| 273 | if (fsm->callbacks->rejci != NULL && (ret = (*fsm->callbacks->rejci)(fsm, input)) == 0) {
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| 274 | syslog(LOG_WARNING, "[PPP/FSM] bad REJ.");
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| 275 | return;
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| 276 | }
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| 277 | }
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| 278 |
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| 279 | fsm->seen_ack = 1;
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| 280 |
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| 281 | switch (fsm->state) {
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| 282 | case PPP_FSM_CLOSED:
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| 283 | case PPP_FSM_STOPPED:
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| 284 | syscall(get_net_buf(&output, sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR)));
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| 285 | memcpy(output->buf, input->buf, sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
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| 286 | ppp_cp_output(PPP_TERMACK, id, output);
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| 287 | return;
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| 288 | break;
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| 289 |
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| 290 | case PPP_FSM_REQSENT:
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| 291 | case PPP_FSM_ACKSENT:
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| 292 | untimeout((FP)fsm_timeout, fsm);
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| 293 | if (ret < 0) /* éä¿¡ãã Conf-Req ãç ´æã空㮠NAK/REJ ãå±ããã*/
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| 294 | fsm->state = PPP_FSM_STOPPED;
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| 295 | else
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| 296 | fsm_sconfreq(fsm, 0);
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| 297 | break;
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| 298 |
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| 299 | case PPP_FSM_ACKRCVD:
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| 300 | untimeout((FP)fsm_timeout, fsm);
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| 301 | fsm_sconfreq(fsm, 0);
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| 302 | fsm->state = PPP_FSM_REQSENT;
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| 303 | break;
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| 304 |
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| 305 | case PPP_FSM_OPENED:
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| 306 | /* åèµ·åãããã´ãããç´ãã*/
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| 307 | if (fsm->callbacks->down != NULL)
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| 308 | (*fsm->callbacks->down)(fsm);
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| 309 | fsm_sconfreq(fsm, 0);
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| 310 | fsm->state = PPP_FSM_REQSENT;
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| 311 | break;
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| 312 | }
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| 313 | }
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| 314 |
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| 315 | /*
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| 316 | * fsm_rconfack -- Configure-ACK ãåä¿¡ããã¨ãã®å¦ç
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| 317 | */
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| 318 |
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| 319 | static void
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| 320 | fsm_rconfack (T_PPP_FSM *fsm, uint8_t id, T_NET_BUF *input)
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| 321 | {
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| 322 | T_NET_BUF *output;
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| 323 |
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| 324 | /* äºæãã ID ã§ãªãããACK ãäºæãã¦ããªãã¨ãã¯çµäºããã*/
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| 325 | if (id != fsm->reqid || fsm->seen_ack) {
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| 326 | syslog(LOG_WARNING, "[PPP/FSM] bad ID or unexp ACK.");
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| 327 | return;
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| 328 | }
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| 329 |
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| 330 | if (fsm->callbacks->ackci != NULL) {
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| 331 | if ((*fsm->callbacks->ackci)(fsm, input) != true) {
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| 332 | syslog(LOG_WARNING, "[PPP/FSM] bad ACK.");
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| 333 | return;
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| 334 | }
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| 335 | }
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| 336 | else if (input->len - (sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR)) != 0) {
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| 337 | syslog(LOG_WARNING, "[PPP/FSM] bad ACK.");
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| 338 | return;
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| 339 | }
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| 340 |
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| 341 | fsm->seen_ack = 1;
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| 342 |
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| 343 | switch (fsm->state) {
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| 344 | case PPP_FSM_CLOSED:
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| 345 | case PPP_FSM_STOPPED:
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| 346 | syscall(get_net_buf(&output, sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR)));
|
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| 347 | memcpy(output->buf, input->buf, sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
|
---|
| 348 | ppp_cp_output(PPP_TERMACK, id, output);
|
---|
| 349 | break;
|
---|
| 350 |
|
---|
| 351 | case PPP_FSM_REQSENT:
|
---|
| 352 | fsm->state = PPP_FSM_ACKRCVD;
|
---|
| 353 | fsm->retrans = MAX_PPP_CONFIGURES;
|
---|
| 354 | break;
|
---|
| 355 |
|
---|
| 356 | case PPP_FSM_ACKRCVD:
|
---|
| 357 | untimeout((FP)fsm_timeout, fsm);
|
---|
| 358 | fsm_sconfreq(fsm, 0);
|
---|
| 359 | fsm->state = PPP_FSM_REQSENT;
|
---|
| 360 | break;
|
---|
| 361 |
|
---|
| 362 | case PPP_FSM_ACKSENT:
|
---|
| 363 | untimeout((FP)fsm_timeout, fsm);
|
---|
| 364 | fsm->state = PPP_FSM_OPENED;
|
---|
| 365 | fsm->retrans = MAX_PPP_CONFIGURES;
|
---|
| 366 | if (fsm->callbacks->up != NULL)
|
---|
| 367 | (*fsm->callbacks->up)(fsm);
|
---|
| 368 | break;
|
---|
| 369 |
|
---|
| 370 | case PPP_FSM_OPENED:
|
---|
| 371 | /* åèµ·åãããã´ãããç´ãã*/
|
---|
| 372 | if (fsm->callbacks->down != NULL)
|
---|
| 373 | (*fsm->callbacks->down)(fsm);
|
---|
| 374 | fsm_sconfreq(fsm, 0);
|
---|
| 375 | fsm->state = PPP_FSM_REQSENT;
|
---|
| 376 | break;
|
---|
| 377 |
|
---|
| 378 | default :
|
---|
| 379 | syslog(LOG_WARNING, "[PPP/FSM] unexp state: %d in recv Conf-ACK.", fsm->state);
|
---|
| 380 | break;
|
---|
| 381 | }
|
---|
| 382 |
|
---|
| 383 | }
|
---|
| 384 |
|
---|
| 385 | /*
|
---|
| 386 | * fsm_rtermreq -- Terminate-Request ãåä¿¡ããã¨ãã®å¦ç
|
---|
| 387 | */
|
---|
| 388 |
|
---|
| 389 | static void
|
---|
| 390 | fsm_rtermreq (T_PPP_FSM *fsm, uint8_t id, T_NET_BUF *input)
|
---|
| 391 | {
|
---|
| 392 | T_NET_BUF *output;
|
---|
| 393 |
|
---|
| 394 | switch (fsm->state) {
|
---|
| 395 | case PPP_FSM_ACKRCVD:
|
---|
| 396 | case PPP_FSM_ACKSENT:
|
---|
| 397 | fsm->state = PPP_FSM_REQSENT;
|
---|
| 398 | break;
|
---|
| 399 |
|
---|
| 400 | case PPP_FSM_OPENED:
|
---|
| 401 | if (fsm->callbacks->down != NULL)
|
---|
| 402 | (*fsm->callbacks->down)(fsm);
|
---|
| 403 | fsm->retrans = 0;
|
---|
| 404 | fsm->state = PPP_FSM_STOPPING;
|
---|
| 405 | timeout((FP)fsm_timeout, fsm, DEF_PPP_TIMEOUT);
|
---|
| 406 | break;
|
---|
| 407 | }
|
---|
| 408 | syscall(get_net_buf(&output, sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR)));
|
---|
| 409 | memcpy(output->buf, input->buf, sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
|
---|
| 410 | ppp_cp_output(PPP_TERMACK, id, output);
|
---|
| 411 | }
|
---|
| 412 |
|
---|
| 413 | /*
|
---|
| 414 | * fsm_rtermack -- Terminate-ACK ãåä¿¡ããã¨ãã®å¦ç
|
---|
| 415 | */
|
---|
| 416 |
|
---|
| 417 | static void
|
---|
| 418 | fsm_rtermack (T_PPP_FSM *fsm, T_NET_BUF *input)
|
---|
| 419 | {
|
---|
| 420 | switch (fsm->state) {
|
---|
| 421 | case PPP_FSM_CLOSING:
|
---|
| 422 | untimeout((FP)fsm_timeout, fsm);
|
---|
| 423 | #if 0 /* æ¬æ¥ã®åä½ã¯ CLOSED ã«é·ç§»ããã*/
|
---|
| 424 | fsm->state = PPP_FSM_CLOSED;
|
---|
| 425 | #else /* of #if 0 */
|
---|
| 426 | fsm->state = PPP_FSM_STOPPED;
|
---|
| 427 | #endif /* of #if 0 */
|
---|
| 428 | if (fsm->callbacks->finished != NULL)
|
---|
| 429 | (*fsm->callbacks->finished)(fsm);
|
---|
| 430 | break;
|
---|
| 431 |
|
---|
| 432 | case PPP_FSM_STOPPING:
|
---|
| 433 | untimeout((FP)fsm_timeout, fsm);
|
---|
| 434 | fsm->state = PPP_FSM_STOPPED;
|
---|
| 435 | if (fsm->callbacks->finished != NULL)
|
---|
| 436 | (*fsm->callbacks->finished)(fsm);
|
---|
| 437 | break;
|
---|
| 438 |
|
---|
| 439 | case PPP_FSM_ACKRCVD:
|
---|
| 440 | fsm->state = PPP_FSM_REQSENT;
|
---|
| 441 | break;
|
---|
| 442 |
|
---|
| 443 | case PPP_FSM_OPENED:
|
---|
| 444 | if (fsm->callbacks->down != NULL)
|
---|
| 445 | (*fsm->callbacks->down)(fsm);
|
---|
| 446 | fsm_sconfreq(fsm, 0);
|
---|
| 447 | break;
|
---|
| 448 | }
|
---|
| 449 | }
|
---|
| 450 |
|
---|
| 451 | /*
|
---|
| 452 | * fsm_rcoderej -- Code-REJ ãåä¿¡ããã¨ãã®å¦ç
|
---|
| 453 | */
|
---|
| 454 |
|
---|
| 455 | static void
|
---|
| 456 | fsm_rcoderej (T_PPP_FSM *fsm, T_NET_BUF *input)
|
---|
| 457 | {
|
---|
| 458 | T_PPP_CP_HDR *hdr;
|
---|
| 459 |
|
---|
| 460 | /* PPP ãªã³ã¯å¶å¾¡ (CP) ãããããçããã°ã¨ã©ã¼ */
|
---|
| 461 | if (input->len < sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR)) {
|
---|
| 462 | syslog(LOG_WARNING, "[PPP/FSM] bad len: %d in recv Code-REJ.", input->len);
|
---|
| 463 | return;
|
---|
| 464 | }
|
---|
| 465 |
|
---|
| 466 | hdr = GET_PPP_CP_HDR(input);
|
---|
| 467 |
|
---|
| 468 | syslog(LOG_WARNING, "[PPP/FSM] recv Code-REJ, code=%d, id=%d.", hdr->code, hdr->id);
|
---|
| 469 |
|
---|
| 470 | if (fsm->state == PPP_FSM_ACKRCVD)
|
---|
| 471 | fsm->state = PPP_FSM_REQSENT;
|
---|
| 472 | }
|
---|
| 473 |
|
---|
| 474 | /*
|
---|
| 475 | * fsm_timeout -- ã¿ã¤ã ã¢ã¦ãå¦ç
|
---|
| 476 | */
|
---|
| 477 |
|
---|
| 478 | static void
|
---|
| 479 | fsm_timeout (void *arg)
|
---|
| 480 | {
|
---|
| 481 | T_PPP_FSM *fsm = (T_PPP_FSM*)arg;
|
---|
| 482 |
|
---|
| 483 | switch (fsm->state) {
|
---|
| 484 | case PPP_FSM_CLOSING:
|
---|
| 485 | case PPP_FSM_STOPPING:
|
---|
| 486 | if (fsm->retrans <= 0) {
|
---|
| 487 | /* æ大åéåæ°ãè¶
|
---|
| 488 | ããã¨ãã®å¦ç */
|
---|
| 489 | #if 0 /* æ¬æ¥ã®åä½ã¯ CLOSED ã«é·ç§»ããã*/
|
---|
| 490 | fsm->state = (fsm->state == PPP_FSM_CLOSING) ? PPP_FSM_CLOSED : PPP_FSM_STOPPED;
|
---|
| 491 | #else /* of #if 0 */
|
---|
| 492 | fsm->state = PPP_FSM_STOPPED;
|
---|
| 493 | #endif /* of #if 0 */
|
---|
| 494 | if (fsm->callbacks->finished != NULL)
|
---|
| 495 | (*fsm->callbacks->finished)(fsm);
|
---|
| 496 | }
|
---|
| 497 | else {
|
---|
| 498 | /* Terminate-Request ãéä¿¡ããã*/
|
---|
| 499 | fsm_stermreq(fsm, ++ fsm->id);
|
---|
| 500 | }
|
---|
| 501 | break;
|
---|
| 502 | case PPP_FSM_REQSENT:
|
---|
| 503 | case PPP_FSM_ACKRCVD:
|
---|
| 504 | case PPP_FSM_ACKSENT:
|
---|
| 505 | if (fsm->retrans <= 0) {
|
---|
| 506 | /* æ大åéåæ°ãè¶
|
---|
| 507 | ããã¨ãã®å¦ç */
|
---|
| 508 | syslog(LOG_WARNING, "[PPP/FSM] retrans Conf-Req.");
|
---|
| 509 | fsm->state = PPP_FSM_STOPPED;
|
---|
| 510 | if (ppp_open_mode != PPP_OPEN_PASSIVE && fsm->callbacks->finished)
|
---|
| 511 | (*fsm->callbacks->finished)(fsm);
|
---|
| 512 | }
|
---|
| 513 | else {
|
---|
| 514 | /* Configure-Request ãåéããã*/
|
---|
| 515 | if (fsm->callbacks->retrans != NULL)
|
---|
| 516 | (*fsm->callbacks->retrans)(fsm);
|
---|
| 517 | fsm_sconfreq(fsm, 1);
|
---|
| 518 | if (fsm->state == PPP_FSM_ACKRCVD)
|
---|
| 519 | fsm->state = PPP_FSM_REQSENT;
|
---|
| 520 | }
|
---|
| 521 |
|
---|
| 522 | break;
|
---|
| 523 |
|
---|
| 524 | default :
|
---|
| 525 | syslog(LOG_WARNING, "[PPP/FSM] unexp state: %d in timeout.", fsm->state);
|
---|
| 526 | break;
|
---|
| 527 | }
|
---|
| 528 | }
|
---|
| 529 |
|
---|
| 530 | /*
|
---|
| 531 | * fsm_stermreq -- Terminate-Request ãéä¿¡ããã
|
---|
| 532 | */
|
---|
| 533 |
|
---|
| 534 | static void
|
---|
| 535 | fsm_stermreq (T_PPP_FSM *fsm, uint8_t id)
|
---|
| 536 | {
|
---|
| 537 | T_NET_BUF *input;
|
---|
| 538 |
|
---|
| 539 | syscall(get_net_buf(&input, sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR)));
|
---|
| 540 | IF_SET_PROTO(input, fsm->proto);
|
---|
| 541 | ppp_cp_output(PPP_TERMREQ, id, input);
|
---|
| 542 |
|
---|
| 543 | timeout((FP)fsm_timeout, fsm, DEF_PPP_TIMEOUT);
|
---|
| 544 | fsm->retrans --;
|
---|
| 545 | }
|
---|
| 546 |
|
---|
| 547 | /*
|
---|
| 548 | * fsm_init -- FSM ã¢ã¸ã¥ã¼ã«ã®åæå
|
---|
| 549 | */
|
---|
| 550 |
|
---|
| 551 | void
|
---|
| 552 | fsm_init (T_PPP_FSM *fsm)
|
---|
| 553 | {
|
---|
| 554 | fsm->state = PPP_FSM_INITIAL;
|
---|
| 555 | fsm->id = 0;
|
---|
| 556 | }
|
---|
| 557 |
|
---|
| 558 | /*
|
---|
| 559 | * fsm_lowerup -- FSM ä¸ä½å±¤ãèµ·åããã
|
---|
| 560 | */
|
---|
| 561 |
|
---|
| 562 | void
|
---|
| 563 | fsm_lowerup (T_PPP_FSM *fsm)
|
---|
| 564 | {
|
---|
| 565 | switch (fsm->state) {
|
---|
| 566 | case PPP_FSM_INITIAL:
|
---|
| 567 | fsm->state = PPP_FSM_CLOSED;
|
---|
| 568 | break;
|
---|
| 569 |
|
---|
| 570 | case PPP_FSM_STARTING:
|
---|
| 571 | if (ppp_open_mode == PPP_OPEN_PASSIVE)
|
---|
| 572 | fsm->state = PPP_FSM_STOPPED;
|
---|
| 573 | else {
|
---|
| 574 | fsm_sconfreq(fsm, 0);
|
---|
| 575 | fsm->state = PPP_FSM_REQSENT;
|
---|
| 576 | }
|
---|
| 577 | break;
|
---|
| 578 |
|
---|
| 579 | default :
|
---|
| 580 | syslog(LOG_WARNING, "[PPP/FSM] unexp state: %d in lowerup", fsm->state);
|
---|
| 581 | break;
|
---|
| 582 | }
|
---|
| 583 | }
|
---|
| 584 |
|
---|
| 585 | /*
|
---|
| 586 | * fsm_lowerdown -- FSM ä¸ä½å±¤ãåæ¢ããã
|
---|
| 587 | */
|
---|
| 588 |
|
---|
| 589 | void
|
---|
| 590 | fsm_lowerdown (T_PPP_FSM *fsm)
|
---|
| 591 | {
|
---|
| 592 | switch (fsm->state) {
|
---|
| 593 | case PPP_FSM_CLOSED:
|
---|
| 594 | fsm->state = PPP_FSM_INITIAL;
|
---|
| 595 | break;
|
---|
| 596 |
|
---|
| 597 | case PPP_FSM_STOPPED:
|
---|
| 598 | fsm->state = PPP_FSM_STARTING;
|
---|
| 599 | if (fsm->callbacks->starting != NULL)
|
---|
| 600 | (*fsm->callbacks->starting)(fsm);
|
---|
| 601 | break;
|
---|
| 602 |
|
---|
| 603 | case PPP_FSM_CLOSING:
|
---|
| 604 | fsm->state = PPP_FSM_INITIAL;
|
---|
| 605 | untimeout((FP)fsm_timeout, fsm);
|
---|
| 606 | break;
|
---|
| 607 |
|
---|
| 608 | case PPP_FSM_STOPPING:
|
---|
| 609 | case PPP_FSM_REQSENT:
|
---|
| 610 | case PPP_FSM_ACKRCVD:
|
---|
| 611 | case PPP_FSM_ACKSENT:
|
---|
| 612 | fsm->state = PPP_FSM_STARTING;
|
---|
| 613 | untimeout((FP)fsm_timeout, fsm);
|
---|
| 614 | break;
|
---|
| 615 |
|
---|
| 616 | case PPP_FSM_OPENED:
|
---|
| 617 | if (fsm->callbacks->down != NULL)
|
---|
| 618 | (*fsm->callbacks->down)(fsm);
|
---|
| 619 | fsm->state = PPP_FSM_STARTING;
|
---|
| 620 | break;
|
---|
| 621 |
|
---|
| 622 | default :
|
---|
| 623 | syslog(LOG_WARNING, "[PPP/FSM] unexp state: %d in lowerdown", fsm->state);
|
---|
| 624 | break;
|
---|
| 625 | }
|
---|
| 626 | }
|
---|
| 627 |
|
---|
| 628 | /*
|
---|
| 629 | * fsm_open -- FSM ã®ãªã¼ãã³
|
---|
| 630 | */
|
---|
| 631 |
|
---|
| 632 | void
|
---|
| 633 | fsm_open (T_PPP_FSM *fsm)
|
---|
| 634 | {
|
---|
| 635 | switch (fsm->state) {
|
---|
| 636 | case PPP_FSM_INITIAL:
|
---|
| 637 | fsm->state = PPP_FSM_STARTING;
|
---|
| 638 | if (fsm->callbacks->starting != NULL)
|
---|
| 639 | (*fsm->callbacks->starting)(fsm);
|
---|
| 640 | break;
|
---|
| 641 |
|
---|
| 642 | case PPP_FSM_CLOSED:
|
---|
| 643 | if (ppp_open_mode == PPP_OPEN_PASSIVE)
|
---|
| 644 | fsm->state = PPP_FSM_STOPPED;
|
---|
| 645 | else {
|
---|
| 646 | fsm_sconfreq(fsm, 0);
|
---|
| 647 | fsm->state = PPP_FSM_REQSENT;
|
---|
| 648 | }
|
---|
| 649 | break;
|
---|
| 650 |
|
---|
| 651 | case PPP_FSM_CLOSING:
|
---|
| 652 | fsm->state = PPP_FSM_STOPPING;
|
---|
| 653 | /* nobreak; ä¸ã«è½ã¡ã */
|
---|
| 654 |
|
---|
| 655 | case PPP_FSM_STOPPED:
|
---|
| 656 | case PPP_FSM_OPENED:
|
---|
| 657 | fsm_lowerdown(fsm);
|
---|
| 658 | fsm_lowerup(fsm);
|
---|
| 659 | break;
|
---|
| 660 | }
|
---|
| 661 | }
|
---|
| 662 |
|
---|
| 663 | /*
|
---|
| 664 | * fsm_close -- ãªã³ã¯ã®åæãéå§ããã
|
---|
| 665 | */
|
---|
| 666 |
|
---|
| 667 | void
|
---|
| 668 | fsm_close (T_PPP_FSM *fsm)
|
---|
| 669 | {
|
---|
| 670 | switch (fsm->state) {
|
---|
| 671 | case PPP_FSM_STARTING:
|
---|
| 672 | fsm->state = PPP_FSM_INITIAL;
|
---|
| 673 | break;
|
---|
| 674 |
|
---|
| 675 | #if 0 /* æ¬æ¥ã®åä½ã¯ CLOSED ã«é·ç§»ããã*/
|
---|
| 676 | case PPP_FSM_STOPPED:
|
---|
| 677 | fsm->state = PPP_FSM_CLOSED;
|
---|
| 678 | break;
|
---|
| 679 | #endif /* of #if 0 */
|
---|
| 680 |
|
---|
| 681 | case PPP_FSM_STOPPING:
|
---|
| 682 | fsm->state = PPP_FSM_CLOSING;
|
---|
| 683 | break;
|
---|
| 684 |
|
---|
| 685 | case PPP_FSM_REQSENT:
|
---|
| 686 | case PPP_FSM_ACKRCVD:
|
---|
| 687 | case PPP_FSM_ACKSENT:
|
---|
| 688 | case PPP_FSM_OPENED:
|
---|
| 689 | if (fsm->state != PPP_FSM_OPENED)
|
---|
| 690 | untimeout((FP)fsm_timeout, fsm);
|
---|
| 691 | else if (fsm->callbacks->down != NULL)
|
---|
| 692 | (*fsm->callbacks->down)(fsm);
|
---|
| 693 |
|
---|
| 694 | /* ã¿ã¤ã ã¢ã¦ããè¨å®ããTerminate-Request ãéä¿¡ããã*/
|
---|
| 695 | fsm->retrans = MAX_PPP_TERMINATES;
|
---|
| 696 | fsm_stermreq(fsm, fsm->reqid = ++ fsm->id);
|
---|
| 697 | fsm->state = PPP_FSM_CLOSING;
|
---|
| 698 | break;
|
---|
| 699 | }
|
---|
| 700 | }
|
---|
| 701 |
|
---|
| 702 | /*
|
---|
| 703 | * fsm_input -- å
|
---|
| 704 | ¥åãPPP ãªã³ã¯å¶å¾¡ (CP) ã®å¶å¾¡ã³ã¼ãã«ããé©å½ãªé¢æ°ãå¼åºã
|
---|
| 705 | */
|
---|
| 706 |
|
---|
| 707 | void
|
---|
| 708 | fsm_input (T_PPP_FSM *fsm, T_NET_BUF *input)
|
---|
| 709 | {
|
---|
| 710 | T_PPP_CP_HDR *hdr;
|
---|
| 711 | T_NET_BUF *output;
|
---|
| 712 |
|
---|
| 713 | /* PPP ãªã³ã¯å¶å¾¡ (CP) ãããããçããã°ã¨ã©ã¼ */
|
---|
| 714 | if (input->len < (sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR))) {
|
---|
| 715 | syslog(LOG_WARNING, "[PPP/FSM] short hdr: %d.", input->len);
|
---|
| 716 | return;
|
---|
| 717 | }
|
---|
| 718 |
|
---|
| 719 | hdr = GET_PPP_CP_HDR(input);
|
---|
| 720 |
|
---|
| 721 | /* ãããã®é·ãã¨å
|
---|
| 722 | ¥åãã¼ã¿ãµã¤ãºãä¸è´ããªããã°ã¨ã©ã¼ */
|
---|
| 723 | if (hdr->len != input->len - sizeof(T_PPP_HDR)) {
|
---|
| 724 | syslog(LOG_WARNING, "[PPP/FSM] bad len: %d.", hdr->len);
|
---|
| 725 | return;
|
---|
| 726 | }
|
---|
| 727 |
|
---|
| 728 | /* ç¶æ
|
---|
| 729 | ã INITIAL ã STARTING ãªãã¨ã©ã¼ */
|
---|
| 730 | if (fsm->state == PPP_FSM_INITIAL || fsm->state == PPP_FSM_STARTING) {
|
---|
| 731 | syslog(LOG_WARNING, "[PPP/FSM] unexp state: %d in input.", fsm->state);
|
---|
| 732 | return;
|
---|
| 733 | }
|
---|
| 734 |
|
---|
| 735 | /*
|
---|
| 736 | * å¶å¾¡ã³ã¼ãã«ããé©å½ãªé¢æ°ãå¼åºã
|
---|
| 737 | */
|
---|
| 738 |
|
---|
| 739 | switch (hdr->code) {
|
---|
| 740 | case PPP_CONFREQ:
|
---|
| 741 | fsm_rconfreq(fsm, hdr->id, input);
|
---|
| 742 | break;
|
---|
| 743 |
|
---|
| 744 | case PPP_CONFACK:
|
---|
| 745 | fsm_rconfack(fsm, hdr->id, input);
|
---|
| 746 | break;
|
---|
| 747 |
|
---|
| 748 | case PPP_CONFNAK:
|
---|
| 749 | case PPP_CONFREJ:
|
---|
| 750 | fsm_rconfnakrej(fsm, hdr->code, hdr->id, input);
|
---|
| 751 | break;
|
---|
| 752 |
|
---|
| 753 | case PPP_TERMREQ:
|
---|
| 754 | fsm_rtermreq(fsm, hdr->id, input);
|
---|
| 755 | break;
|
---|
| 756 |
|
---|
| 757 | case PPP_TERMACK:
|
---|
| 758 | fsm_rtermack(fsm, input);
|
---|
| 759 | break;
|
---|
| 760 |
|
---|
| 761 | case PPP_CODEREJ:
|
---|
| 762 | fsm_rcoderej(fsm, input);
|
---|
| 763 | break;
|
---|
| 764 |
|
---|
| 765 | default:
|
---|
| 766 | if (fsm->callbacks->extcode == NULL ||
|
---|
| 767 | (*fsm->callbacks->extcode)(fsm, hdr->code, hdr->id, input) != true) {
|
---|
| 768 | syscall(get_net_buf(&output, sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR)));
|
---|
| 769 | memcpy(output->buf, input->buf, sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
|
---|
| 770 | ppp_cp_output(PPP_CODEREJ, ++ fsm->id, output);
|
---|
| 771 | }
|
---|
| 772 | break;
|
---|
| 773 | }
|
---|
| 774 | }
|
---|
| 775 |
|
---|
| 776 | /*
|
---|
| 777 | * fsm_protoreject -- Proto-REJ ãåä¿¡ããã¨ãã®å¦ç
|
---|
| 778 | */
|
---|
| 779 |
|
---|
| 780 | void
|
---|
| 781 | fsm_protreject (T_PPP_FSM *fsm)
|
---|
| 782 | {
|
---|
| 783 | switch (fsm->state) {
|
---|
| 784 | case PPP_FSM_CLOSING:
|
---|
| 785 | untimeout((FP)fsm_timeout, fsm);
|
---|
| 786 |
|
---|
| 787 | #if 0 /* æ¬æ¥ã®åä½ã¯ CLOSED ã«é·ç§»ããã*/
|
---|
| 788 | /* ä¸ã«è½ã¡ã */
|
---|
| 789 | #else /* of #if 0 */
|
---|
| 790 | fsm->state = PPP_FSM_STOPPED;
|
---|
| 791 | if (fsm->callbacks->finished != NULL)
|
---|
| 792 | (*fsm->callbacks->finished)(fsm);
|
---|
| 793 | break;
|
---|
| 794 | #endif /* of #if 0 */
|
---|
| 795 |
|
---|
| 796 | case PPP_FSM_CLOSED:
|
---|
| 797 | fsm->state = PPP_FSM_CLOSED;
|
---|
| 798 | if (fsm->callbacks->finished != NULL)
|
---|
| 799 | (*fsm->callbacks->finished)(fsm);
|
---|
| 800 | break;
|
---|
| 801 |
|
---|
| 802 | case PPP_FSM_STOPPING:
|
---|
| 803 | case PPP_FSM_REQSENT:
|
---|
| 804 | case PPP_FSM_ACKRCVD:
|
---|
| 805 | case PPP_FSM_ACKSENT:
|
---|
| 806 | untimeout((FP)fsm_timeout, fsm);
|
---|
| 807 | /* ä¸ã«è½ã¡ã */
|
---|
| 808 |
|
---|
| 809 | case PPP_FSM_STOPPED:
|
---|
| 810 | fsm->state = PPP_FSM_STOPPED;
|
---|
| 811 | if (fsm->callbacks->finished != NULL)
|
---|
| 812 | (*fsm->callbacks->finished)(fsm);
|
---|
| 813 | break;
|
---|
| 814 |
|
---|
| 815 | case PPP_FSM_OPENED:
|
---|
| 816 | if (fsm->callbacks->down != NULL)
|
---|
| 817 | (*fsm->callbacks->down)(fsm);
|
---|
| 818 |
|
---|
| 819 | /* ã¿ã¤ã ã¢ã¦ããè¨å®ããTerminate-Request ãéä¿¡ããã*/
|
---|
| 820 | fsm->retrans = MAX_PPP_TERMINATES;
|
---|
| 821 | fsm_stermreq(fsm, fsm->reqid = ++ fsm->id);
|
---|
| 822 | fsm->state = PPP_FSM_STOPPING;
|
---|
| 823 | break;
|
---|
| 824 |
|
---|
| 825 | }
|
---|
| 826 | }
|
---|
| 827 |
|
---|
| 828 | #endif /* fo #ifdef SUPPORT_PPP */
|
---|