[388] | 1 | /*
|
---|
| 2 | * TINET (TCP/IP Protocol Stack)
|
---|
| 3 | *
|
---|
| 4 | * Copyright (C) 2001-2017 by Dep. of Computer Science and Engineering
|
---|
| 5 | * Tomakomai National College of Technology, JAPAN
|
---|
| 6 | *
|
---|
| 7 | * ä¸è¨èä½æ¨©è
|
---|
| 8 | ã¯ï¼ä»¥ä¸ã® (1)ï½(4) ã®æ¡ä»¶ãï¼Free Software Foundation
|
---|
| 9 | * ã«ãã£ã¦å
|
---|
| 10 | ¬è¡¨ããã¦ãã GNU General Public License ã® Version 2 ã«è¨
|
---|
| 11 | * è¿°ããã¦ããæ¡ä»¶ãæºããå ´åã«éãï¼æ¬ã½ããã¦ã§ã¢ï¼æ¬ã½ããã¦ã§ã¢
|
---|
| 12 | * ãæ¹å¤ãããã®ãå«ãï¼ä»¥ä¸åãï¼ã使ç¨ã»è¤è£½ã»æ¹å¤ã»åé
|
---|
| 13 | å¸ï¼ä»¥ä¸ï¼
|
---|
| 14 | * å©ç¨ã¨å¼ã¶ï¼ãããã¨ãç¡åã§è¨±è«¾ããï¼
|
---|
| 15 | * (1) æ¬ã½ããã¦ã§ã¢ãã½ã¼ã¹ã³ã¼ãã®å½¢ã§å©ç¨ããå ´åã«ã¯ï¼ä¸è¨ã®èä½
|
---|
| 16 | * 権表示ï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãï¼ãã®ã¾ã¾ã®å½¢ã§ã½ã¼
|
---|
| 17 | * ã¹ã³ã¼ãä¸ã«å«ã¾ãã¦ãããã¨ï¼
|
---|
| 18 | * (2) æ¬ã½ããã¦ã§ã¢ãï¼ã©ã¤ãã©ãªå½¢å¼ãªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
|
---|
| 19 | * ç¨ã§ããå½¢ã§åé
|
---|
| 20 | å¸ããå ´åã«ã¯ï¼åé
|
---|
| 21 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨
|
---|
| 22 | * è
|
---|
| 23 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®èä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨
|
---|
| 24 | * ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
|
---|
| 25 | * (3) æ¬ã½ããã¦ã§ã¢ãï¼æ©å¨ã«çµã¿è¾¼ããªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
|
---|
| 26 | * ç¨ã§ããªãå½¢ã§åé
|
---|
| 27 | å¸ããå ´åã«ã¯ï¼æ¬¡ã®æ¡ä»¶ãæºãããã¨ï¼
|
---|
| 28 | * (a) åé
|
---|
| 29 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨è
|
---|
| 30 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®è
|
---|
| 31 | * ä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
|
---|
| 32 | * (4) æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´æ¥çã¾ãã¯éæ¥çã«çãããããªãæ
|
---|
| 33 | * 害ãããï¼ä¸è¨èä½æ¨©è
|
---|
| 34 | ããã³TOPPERSããã¸ã§ã¯ããå
|
---|
| 35 | 責ãããã¨ï¼
|
---|
| 36 | *
|
---|
| 37 | * æ¬ã½ããã¦ã§ã¢ã¯ï¼ç¡ä¿è¨¼ã§æä¾ããã¦ãããã®ã§ããï¼ä¸è¨èä½æ¨©è
|
---|
| 38 | ã
|
---|
| 39 | * ãã³TOPPERSããã¸ã§ã¯ãã¯ï¼æ¬ã½ããã¦ã§ã¢ã«é¢ãã¦ï¼ãã®é©ç¨å¯è½æ§ã
|
---|
| 40 | * å«ãã¦ï¼ãããªãä¿è¨¼ãè¡ããªãï¼ã¾ãï¼æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´
|
---|
| 41 | * æ¥çã¾ãã¯éæ¥çã«çãããããªãæ害ã«é¢ãã¦ãï¼ãã®è²¬ä»»ãè² ããªãï¼
|
---|
| 42 | *
|
---|
| 43 | * @(#) $Id: ppp_lcp.c 388 2019-05-22 11:25:18Z coas-nagasima $
|
---|
| 44 | */
|
---|
| 45 |
|
---|
| 46 | /*
|
---|
| 47 | * lcp.c - PPP Link Control Protocol.
|
---|
| 48 | *
|
---|
| 49 | * Copyright (c) 1989 Carnegie Mellon University.
|
---|
| 50 | * All rights reserved.
|
---|
| 51 | *
|
---|
| 52 | * Redistribution and use in source and binary forms are permitted
|
---|
| 53 | * provided that the above copyright notice and this paragraph are
|
---|
| 54 | * duplicated in all such forms and that any documentation,
|
---|
| 55 | * advertising materials, and other materials related to such
|
---|
| 56 | * distribution and use acknowledge that the software was developed
|
---|
| 57 | * by Carnegie Mellon University. The name of the
|
---|
| 58 | * University may not be used to endorse or promote products derived
|
---|
| 59 | * from this software without specific prior written permission.
|
---|
| 60 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
|
---|
| 61 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
|
---|
| 62 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
---|
| 63 | */
|
---|
| 64 |
|
---|
| 65 | /*
|
---|
| 66 | * PPP Link Control Protocol (LCP) Module
|
---|
| 67 | *
|
---|
| 68 | * Written by Toshiharu OHNO (tony-o@iij.ad.jp)
|
---|
| 69 | *
|
---|
| 70 | * Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd.
|
---|
| 71 | *
|
---|
| 72 | * Redistribution and use in source and binary forms are permitted
|
---|
| 73 | * provided that the above copyright notice and this paragraph are
|
---|
| 74 | * duplicated in all such forms and that any documentation,
|
---|
| 75 | * advertising materials, and other materials related to such
|
---|
| 76 | * distribution and use acknowledge that the software was developed
|
---|
| 77 | * by the Internet Initiative Japan, Inc. The name of the
|
---|
| 78 | * IIJ may not be used to endorse or promote products derived
|
---|
| 79 | * from this software without specific prior written permission.
|
---|
| 80 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
|
---|
| 81 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
|
---|
| 82 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
---|
| 83 | *
|
---|
| 84 | * $FreeBSD: src/usr.sbin/ppp/lcp.c,v 1.81.2.3 2000/08/19 09:30:04 brian Exp $
|
---|
| 85 | *
|
---|
| 86 | */
|
---|
| 87 |
|
---|
| 88 | #include <string.h>
|
---|
| 89 |
|
---|
| 90 | #include <s_services.h>
|
---|
| 91 | #include <t_services.h>
|
---|
| 92 | #include "kernel_id.h"
|
---|
| 93 |
|
---|
| 94 | #include <tinet_defs.h>
|
---|
| 95 | #include <tinet_config.h>
|
---|
| 96 |
|
---|
| 97 | #include <net/if.h>
|
---|
| 98 | #include <net/if_ppp.h>
|
---|
| 99 | #include <net/net.h>
|
---|
| 100 | #include <net/net_endian.h>
|
---|
| 101 | #include <net/net_var.h>
|
---|
| 102 | #include <net/net_buf.h>
|
---|
| 103 | #include <net/net_timer.h>
|
---|
| 104 | #include <net/net_count.h>
|
---|
| 105 | #include <net/ppp.h>
|
---|
| 106 | #include <net/ppp_var.h>
|
---|
| 107 | #include <net/ppp_hdlc.h>
|
---|
| 108 | #include <net/ppp_auth.h>
|
---|
| 109 | #include <net/ppp_fsm.h>
|
---|
| 110 | #include <net/ppp_lcp.h>
|
---|
| 111 |
|
---|
| 112 | #ifdef SUPPORT_PPP
|
---|
| 113 |
|
---|
| 114 | /*
|
---|
| 115 | * é¢æ°
|
---|
| 116 | */
|
---|
| 117 |
|
---|
| 118 | static void lcp_init (void);
|
---|
| 119 | static void lcp_protrej (void);
|
---|
| 120 | static void lcp_input (T_NET_BUF *input);
|
---|
| 121 |
|
---|
| 122 | #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC
|
---|
| 123 |
|
---|
| 124 | static void send_echo_req (T_PPP_FSM *fsm);
|
---|
| 125 | static void recv_echo_rep (T_PPP_FSM *fsm, uint8_t id, T_NET_BUF *input);
|
---|
| 126 | static void echo_timeout (void *arg);
|
---|
| 127 | static void echo_lowerup (void);
|
---|
| 128 | static void echo_lowerdown (void);
|
---|
| 129 |
|
---|
| 130 | #endif /* of #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC */
|
---|
| 131 |
|
---|
| 132 | /*
|
---|
| 133 | * FSM ããå¼åºãããã³ã¼ã«ããã¯é¢æ°
|
---|
| 134 | */
|
---|
| 135 |
|
---|
| 136 | static void lcp_resetci(T_PPP_FSM *fsm); /* èªæ§ææ
|
---|
| 137 | å ±ããªã»ããããã */
|
---|
| 138 | static int_t lcp_cilen (T_PPP_FSM *fsm); /* æ§ææ
|
---|
| 139 | å ±ã®é·ããè¿ãã */
|
---|
| 140 | static void lcp_addci (T_PPP_FSM *fsm, T_NET_BUF *output);
|
---|
| 141 | /* èªæ§ææ
|
---|
| 142 | å ±ã追å ããã */
|
---|
| 143 | static bool_t lcp_ackci (T_PPP_FSM *fsm, T_NET_BUF *input);
|
---|
| 144 | /* ACK ãåä¿¡ããã¨ãã®å¦ç */
|
---|
| 145 | static bool_t lcp_nakci (T_PPP_FSM *fsm, T_NET_BUF *input);
|
---|
| 146 | /* NAK ãåä¿¡ããã¨ãã®å¦ç */
|
---|
| 147 | static bool_t lcp_rejci (T_PPP_FSM *fsm, T_NET_BUF *input);
|
---|
| 148 | /* REJ ãåä¿¡ããã¨ãã®å¦ç */
|
---|
| 149 | static int_t lcp_reqci (T_PPP_FSM *fsm, T_NET_BUF *input, T_NET_BUF *output);
|
---|
| 150 | /* ç¸æã®æ§ææ
|
---|
| 151 | å ±ã確èªããã */
|
---|
| 152 | static void lcp_up (T_PPP_FSM *fsm); /* ãªã³ã¯æ¥ç¶ã確ç«ããã */
|
---|
| 153 | static void lcp_starting(T_PPP_FSM *fsm); /* ä¸ä½å±¤ãéå§ããã */
|
---|
| 154 | static bool_t lcp_extcode (T_PPP_FSM *fsm, uint8_t code, uint8_t id, T_NET_BUF *input);
|
---|
| 155 | /* ä¸æ㪠CP ãåä¿¡ããã¨ãã®å¦ç */
|
---|
| 156 | static void lcp_rprotrej(T_PPP_FSM *fsm, T_NET_BUF *input);
|
---|
| 157 | /* Proto-REJ ãåä¿¡ããã¨ãã®å¦ç */
|
---|
| 158 | /*
|
---|
| 159 | * å¤æ°
|
---|
| 160 | */
|
---|
| 161 |
|
---|
| 162 | static T_LCP_CONFIGS lcp_def_cfg = { /* æ§ææ
|
---|
| 163 | å ±ã®åæè¨å®å¤ */
|
---|
| 164 | DEF_REMOTE_ACCM, /* ACCM */
|
---|
| 165 |
|
---|
| 166 | #ifdef LCP_CFG_MAGIC
|
---|
| 167 |
|
---|
| 168 | ULONG_C(0), /* ãã¸ãã¯çªå· */
|
---|
| 169 |
|
---|
| 170 | #endif /* of #ifdef LCP_CFG_MAGIC */
|
---|
| 171 |
|
---|
| 172 | DEF_PPP_MTU, /* MRU */
|
---|
| 173 | UINT_C(0), /* ãªãã·ã§ã³ãã©ã° */
|
---|
| 174 | };
|
---|
| 175 |
|
---|
| 176 | static T_LCP_CONFIGS lcp_local_def_cfg = { /* èªæ§ææ
|
---|
| 177 | å ±ã®è¦å®å¤ */
|
---|
| 178 | DEF_LOCAL_ACCM, /* ACCM */
|
---|
| 179 |
|
---|
| 180 | #ifdef LCP_CFG_MAGIC
|
---|
| 181 |
|
---|
| 182 | ULONG_C(0), /* ãã¸ãã¯çªå· */
|
---|
| 183 |
|
---|
| 184 | #endif /* of #ifdef LCP_CFG_MAGIC */
|
---|
| 185 |
|
---|
| 186 | DEF_PPP_MTU, /* MRU */
|
---|
| 187 | DEF_LCP_LOCAL_CFGS, /* ãªãã·ã§ã³ãã©ã° */
|
---|
| 188 | };
|
---|
| 189 |
|
---|
| 190 | static T_LCP_CONFIGS lcp_local_neg_cfg; /* ãã´ä¸ã®èªæ§ææ
|
---|
| 191 | å ± */
|
---|
| 192 |
|
---|
| 193 | static T_LCP_CONFIGS lcp_remote_neg_cfg; /* ãã´ä¸ã®ç¸æã®æ§ææ
|
---|
| 194 | å ± */
|
---|
| 195 |
|
---|
| 196 | #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC
|
---|
| 197 |
|
---|
| 198 | static uint8_t echo_pending = UINT_C(0);
|
---|
| 199 | static uint8_t echo_number = UINT_C(0);
|
---|
| 200 | static uint8_t timer_running = false;
|
---|
| 201 |
|
---|
| 202 | #endif /* of #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC */
|
---|
| 203 |
|
---|
| 204 | /*
|
---|
| 205 | * å
|
---|
| 206 | ¨åå¤æ°
|
---|
| 207 | */
|
---|
| 208 |
|
---|
| 209 | T_PPP_FSM_CALLBACKS lcp_callbacks = {
|
---|
| 210 | lcp_resetci, /* èªæ§ææ
|
---|
| 211 | å ±ããªã»ããããã */
|
---|
| 212 | lcp_cilen, /* æ§ææ
|
---|
| 213 | å ±ã®é·ããè¿ãã */
|
---|
| 214 | lcp_addci, /* èªæ§ææ
|
---|
| 215 | å ±ã追å ããã */
|
---|
| 216 | lcp_ackci, /* ACK ãåä¿¡ããã¨ãã®å¦ç */
|
---|
| 217 | lcp_nakci, /* NAK ãåä¿¡ããã¨ãã®å¦ç */
|
---|
| 218 | lcp_rejci, /* REJ ãåä¿¡ããã¨ãã®å¦ç */
|
---|
| 219 | lcp_reqci, /* ç¸æã®æ§ææ
|
---|
| 220 | å ±ã確èªããã */
|
---|
| 221 | lcp_up, /* ãªã³ã¯æ¥ç¶ã確ç«ããã */
|
---|
| 222 | lcp_down, /* ãªã³ã¯æ¥ç¶ã解æ¾ããã */
|
---|
| 223 | lcp_starting, /* ä¸ä½å±¤ãéå§ããã */
|
---|
| 224 | lcp_finished, /* ä¸ä½å±¤ãçµäºããã */
|
---|
| 225 | NULL, /* åéããã */
|
---|
| 226 | lcp_extcode, /* ä¸æ㪠CP ãåä¿¡ããã¨ãã®å¦ç */
|
---|
| 227 | };
|
---|
| 228 |
|
---|
| 229 | T_PPP_FSM lcp_fsm = {
|
---|
| 230 | &lcp_callbacks, /* ã³ã¼ã«ããã¯é¢æ° */
|
---|
| 231 | PPP_LCP, /* ãããã³ã« */
|
---|
| 232 | };
|
---|
| 233 |
|
---|
| 234 | T_PPP_PROTENT lcp_protent = {
|
---|
| 235 | PPP_LCP,
|
---|
| 236 | lcp_init, /* åæå */
|
---|
| 237 | lcp_input, /* å
|
---|
| 238 | ¥å */
|
---|
| 239 | lcp_protrej, /* Proto-REJ åä¿¡å¦ç */
|
---|
| 240 | NULL, /* ä¸ä½å±¤ãèµ·åãã */
|
---|
| 241 | lcp_lowerdown, /* ä¸ä½å±¤ãåæ¢ãã */
|
---|
| 242 | NULL, /* ãªã¼ãã³ãã */
|
---|
| 243 | lcp_close, /* ã¯ãã¼ãºãã */
|
---|
| 244 | NULL, /* ãã¼ã¿å
|
---|
| 245 | ¥å */
|
---|
| 246 | };
|
---|
| 247 |
|
---|
| 248 | T_LCP_CONFIGS lcp_local_ack_cfg; /* ç¸æã«è¨±å¯ãããã®èªæ§ææ
|
---|
| 249 | å ± */
|
---|
| 250 | T_LCP_CONFIGS lcp_remote_ack_cfg; /* ç¸æã«è¨±å¯ããæ§ææ
|
---|
| 251 | å ± */
|
---|
| 252 |
|
---|
| 253 | /*
|
---|
| 254 | * lcp_init -- LCP ã¢ã¸ã¥ã¼ã«ã®åæå
|
---|
| 255 | */
|
---|
| 256 |
|
---|
| 257 | static void
|
---|
| 258 | lcp_init (void)
|
---|
| 259 | {
|
---|
| 260 | fsm_init(&lcp_fsm);
|
---|
| 261 | }
|
---|
| 262 |
|
---|
| 263 | /*
|
---|
| 264 | * lcp_input -- LCP å
|
---|
| 265 | ¥å
|
---|
| 266 | */
|
---|
| 267 |
|
---|
| 268 | static void
|
---|
| 269 | lcp_input (T_NET_BUF *input)
|
---|
| 270 | {
|
---|
| 271 | NET_COUNT_PPP_LCP(net_count_ppp_lcp_in_octets, input->len);
|
---|
| 272 | NET_COUNT_PPP_LCP(net_count_ppp_lcp_in_packets, 1);
|
---|
| 273 | fsm_input(&lcp_fsm, input);
|
---|
| 274 | }
|
---|
| 275 |
|
---|
| 276 | /*
|
---|
| 277 | * lcp_resetci -- LCPã®æ§ææ
|
---|
| 278 | å ±ããªã»ããããã
|
---|
| 279 | */
|
---|
| 280 |
|
---|
| 281 | static void
|
---|
| 282 | lcp_resetci (T_PPP_FSM *fsm)
|
---|
| 283 | {
|
---|
| 284 | #ifdef LCP_CFG_MAGIC
|
---|
| 285 |
|
---|
| 286 | SYSTIM time;
|
---|
| 287 |
|
---|
| 288 | #endif /* of #ifdef LCP_CFG_MAGIC */
|
---|
| 289 |
|
---|
| 290 | /* èªæ§ææ
|
---|
| 291 | å ±ã®åæè¨å® */
|
---|
| 292 | lcp_local_neg_cfg = lcp_local_def_cfg;
|
---|
| 293 | lcp_local_ack_cfg = lcp_def_cfg;
|
---|
| 294 |
|
---|
| 295 | /* ç¸æã®æ§ææ
|
---|
| 296 | å ±ã®åæè¨å® */
|
---|
| 297 | lcp_remote_neg_cfg = lcp_def_cfg;
|
---|
| 298 | lcp_remote_ack_cfg = lcp_def_cfg;
|
---|
| 299 |
|
---|
| 300 | #ifdef LCP_CFG_MAGIC
|
---|
| 301 |
|
---|
| 302 | syscall(get_tim(&time));
|
---|
| 303 | net_srand((unsigned int)time);
|
---|
| 304 | lcp_local_neg_cfg.magic = net_rand();
|
---|
| 305 |
|
---|
| 306 | #endif /* of #ifdef LCP_CFG_MAGIC */
|
---|
| 307 |
|
---|
| 308 | auth_reset();
|
---|
| 309 | }
|
---|
| 310 |
|
---|
| 311 | /*
|
---|
| 312 | * lcp_cilen -- æ§ææ
|
---|
| 313 | å ±ã®é·ããè¿ãã
|
---|
| 314 | */
|
---|
| 315 |
|
---|
| 316 | static int_t
|
---|
| 317 | lcp_cilen (T_PPP_FSM *fsm)
|
---|
| 318 | {
|
---|
| 319 | int_t cilen = 0;
|
---|
| 320 |
|
---|
| 321 | if (lcp_local_neg_cfg.options & LCP_CFG_MRU)
|
---|
| 322 | cilen += sizeof(T_PPP_CI_HDR) + sizeof(uint16_t); /* MRU */
|
---|
| 323 |
|
---|
| 324 | if (lcp_local_neg_cfg.options & LCP_CFG_ACCM)
|
---|
| 325 | cilen += sizeof(T_PPP_CI_HDR) + sizeof(uint32_t); /* ACCM */
|
---|
| 326 |
|
---|
| 327 | #ifdef LCP_CFG_MAGIC
|
---|
| 328 |
|
---|
| 329 | if (lcp_local_neg_cfg.options & LCP_CFG_MAGIC)
|
---|
| 330 | cilen += sizeof(T_PPP_CI_HDR) + sizeof(uint32_t); /* Magic */
|
---|
| 331 |
|
---|
| 332 | #endif /* of #ifdef LCP_CFG_MAGIC */
|
---|
| 333 |
|
---|
| 334 | #ifdef LCP_CFG_PAP
|
---|
| 335 |
|
---|
| 336 | if (lcp_local_neg_cfg.options & LCP_CFG_PAP)
|
---|
| 337 | cilen += sizeof(T_PPP_CI_HDR) + sizeof(uint16_t); /* PAP */
|
---|
| 338 |
|
---|
| 339 | #endif /* of #ifdef LCP_CFG_PAP */
|
---|
| 340 |
|
---|
| 341 | #ifdef LCP_CFG_PCOMP
|
---|
| 342 |
|
---|
| 343 | if (lcp_local_neg_cfg.options & LCP_CFG_PCOMP)
|
---|
| 344 | cilen += sizeof(T_PPP_CI_HDR); /* ãããã³ã«å§ç¸® */
|
---|
| 345 |
|
---|
| 346 | #endif /* of #ifdef LCP_CFG_PCOMP */
|
---|
| 347 |
|
---|
| 348 | #ifdef LCP_CFG_ACCOMP
|
---|
| 349 |
|
---|
| 350 | if (lcp_local_neg_cfg.options & LCP_CFG_ACCOMP)
|
---|
| 351 | cilen += sizeof(T_PPP_CI_HDR); /* ã¢ãã¬ã¹ã»å¶å¾¡å§ç¸® */
|
---|
| 352 |
|
---|
| 353 | #endif /* of #ifdef LCP_CFG_ACCOMP */
|
---|
| 354 |
|
---|
| 355 | return cilen;
|
---|
| 356 | }
|
---|
| 357 |
|
---|
| 358 | /*
|
---|
| 359 | * lcp_addci -- LCPã®æ§ææ
|
---|
| 360 | å ±ã追å ããã
|
---|
| 361 | */
|
---|
| 362 |
|
---|
| 363 | static void
|
---|
| 364 | lcp_addci (T_PPP_FSM *fsm, T_NET_BUF *output)
|
---|
| 365 | {
|
---|
| 366 | uint8_t *buf;
|
---|
| 367 |
|
---|
| 368 | buf = output->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR);
|
---|
| 369 |
|
---|
| 370 | /* MRU ãªãã·ã§ã³ã追å ããã */
|
---|
| 371 | if (lcp_local_neg_cfg.options & LCP_CFG_MRU) {
|
---|
| 372 | *buf ++ = LCP_CIT_MRU;
|
---|
| 373 | *buf ++ = sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 374 | *((uint16_t*)buf) = htons(lcp_local_neg_cfg.MRU);
|
---|
| 375 | buf += sizeof(uint16_t);
|
---|
| 376 | }
|
---|
| 377 |
|
---|
| 378 | /* ACCM ãªãã·ã§ã³ã追å ããã */
|
---|
| 379 | if (lcp_local_neg_cfg.options & LCP_CFG_ACCM) {
|
---|
| 380 | *buf ++ = LCP_CIT_ACCM;
|
---|
| 381 | *buf ++ = sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 382 | ahtonl(buf, lcp_local_neg_cfg.ACCM);
|
---|
| 383 | buf += sizeof(uint32_t);
|
---|
| 384 | }
|
---|
| 385 |
|
---|
| 386 | #ifdef LCP_CFG_MAGIC
|
---|
| 387 |
|
---|
| 388 | /* Magic Number ãªãã·ã§ã³ã追å ããã */
|
---|
| 389 | if (lcp_local_neg_cfg.options & LCP_CFG_MAGIC) {
|
---|
| 390 | *buf ++ = LCP_CIT_MAGIC;
|
---|
| 391 | *buf ++ = sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 392 | ahtonl(buf, lcp_local_neg_cfg.magic);
|
---|
| 393 | buf += sizeof(uint32_t);
|
---|
| 394 | }
|
---|
| 395 |
|
---|
| 396 | #endif /* of #ifdef LCP_CFG_MAGIC */
|
---|
| 397 |
|
---|
| 398 | #ifdef LCP_CFG_PAP
|
---|
| 399 |
|
---|
| 400 | /* èªè¨¼ãããã³ã«ãªãã·ã§ã³ã追å ããã */
|
---|
| 401 | if (lcp_local_neg_cfg.options & LCP_CFG_PAP) {
|
---|
| 402 | *buf ++ = LCP_CIT_AUTH;
|
---|
| 403 | *buf ++ = sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 404 | *((uint16_t*)buf) = htons(PPP_PAP);
|
---|
| 405 | buf += sizeof(uint16_t);
|
---|
| 406 | }
|
---|
| 407 |
|
---|
| 408 | #endif /* of #ifdef LCP_CFG_PAP */
|
---|
| 409 |
|
---|
| 410 | #ifdef LCP_CFG_PCOMP
|
---|
| 411 |
|
---|
| 412 | /* ãããã³ã«å§ç¸®ãªãã·ã§ã³ã追å ããã */
|
---|
| 413 | if (lcp_local_neg_cfg.options & LCP_CFG_PCOMP) {
|
---|
| 414 | *buf ++ = LCP_CIT_PCOMP;
|
---|
| 415 | *buf ++ = sizeof(T_PPP_CI_HDR);
|
---|
| 416 | }
|
---|
| 417 |
|
---|
| 418 | #endif /* of #ifdef LCP_CFG_PCOMP */
|
---|
| 419 |
|
---|
| 420 | #ifdef LCP_CFG_ACCOMP
|
---|
| 421 |
|
---|
| 422 | /* ã¢ãã¬ã¹ã»å¶å¾¡å§ç¸®ãªãã·ã§ã³ã追å ããã */
|
---|
| 423 | if (lcp_local_neg_cfg.options & LCP_CFG_ACCOMP) {
|
---|
| 424 | *buf ++ = LCP_CIT_ACCOMP;
|
---|
| 425 | *buf ++ = sizeof(T_PPP_CI_HDR);
|
---|
| 426 | }
|
---|
| 427 |
|
---|
| 428 | #endif /* of #ifdef LCP_CFG_ACCOMP */
|
---|
| 429 | }
|
---|
| 430 |
|
---|
| 431 | /*
|
---|
| 432 | * lcp_ackci -- ACK ãåä¿¡ããã¨ãã®å¦ç
|
---|
| 433 | *
|
---|
| 434 | * æ»ãå¤: TURE ACK ã¯æ£å¸¸
|
---|
| 435 | * false ACK ã¯ç°å¸¸
|
---|
| 436 | */
|
---|
| 437 |
|
---|
| 438 | static bool_t
|
---|
| 439 | lcp_ackci (T_PPP_FSM *fsm, T_NET_BUF *input)
|
---|
| 440 | {
|
---|
| 441 | uint8_t *buf;
|
---|
| 442 | uint16_t len;
|
---|
| 443 |
|
---|
| 444 | buf = input->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR);
|
---|
| 445 | len = input->len - (sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
|
---|
| 446 |
|
---|
| 447 | /*
|
---|
| 448 | * æ§ææ
|
---|
| 449 | å ±ã¯éä¿¡ããé ã«å®å
|
---|
| 450 | ¨ã«ä¸è´ããªããã°ãªããªãã
|
---|
| 451 | * å¾ã£ã¦ãlcp_addci ã§ä½æããé ã«è§£æããã
|
---|
| 452 | */
|
---|
| 453 |
|
---|
| 454 | /* MRU ãªãã·ã§ã³ã解æããã */
|
---|
| 455 | if (lcp_local_neg_cfg.options & LCP_CFG_MRU) {
|
---|
| 456 | if (len < sizeof(T_PPP_CI_HDR) + sizeof(uint16_t) ||
|
---|
| 457 | *buf ++ != LCP_CIT_MRU ||
|
---|
| 458 | *buf ++ != sizeof(T_PPP_CI_HDR) + sizeof(uint16_t)||
|
---|
| 459 | *((uint16_t*)buf) != htons(lcp_local_neg_cfg.MRU) )
|
---|
| 460 | return false;
|
---|
| 461 | buf += sizeof(uint16_t);
|
---|
| 462 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 463 | }
|
---|
| 464 |
|
---|
| 465 | /* ACCM ãªãã·ã§ã³ã解æããã */
|
---|
| 466 | if (lcp_local_neg_cfg.options & LCP_CFG_ACCM) {
|
---|
| 467 | if (len < sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) ||
|
---|
| 468 | *buf ++ != LCP_CIT_ACCM ||
|
---|
| 469 | *buf ++ != sizeof(T_PPP_CI_HDR) + sizeof(uint32_t)||
|
---|
| 470 | nahcmpl(buf, lcp_local_neg_cfg.ACCM) )
|
---|
| 471 | return false;
|
---|
| 472 | buf += sizeof(uint32_t);
|
---|
| 473 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 474 | }
|
---|
| 475 |
|
---|
| 476 | #ifdef LCP_CFG_MAGIC
|
---|
| 477 |
|
---|
| 478 | /* Magic Number ãªãã·ã§ã³ã解æããã */
|
---|
| 479 | if (lcp_local_neg_cfg.options & LCP_CFG_MAGIC) {
|
---|
| 480 | if (len < sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) ||
|
---|
| 481 | *buf ++ != LCP_CIT_MAGIC ||
|
---|
| 482 | *buf ++ != sizeof(T_PPP_CI_HDR) + sizeof(uint32_t)||
|
---|
| 483 | nahcmpl(buf, lcp_local_neg_cfg.magic) )
|
---|
| 484 | return false;
|
---|
| 485 | buf += sizeof(uint32_t);
|
---|
| 486 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 487 | }
|
---|
| 488 |
|
---|
| 489 | #endif /* of #ifdef LCP_CFG_MAGIC */
|
---|
| 490 |
|
---|
| 491 | #ifdef LCP_CFG_PAP
|
---|
| 492 |
|
---|
| 493 | /* èªè¨¼ãããã³ã«ãªãã·ã§ã³ã解æããã */
|
---|
| 494 | if (lcp_local_neg_cfg.options & LCP_CFG_PAP) {
|
---|
| 495 | if (len < sizeof(T_PPP_CI_HDR) + sizeof(uint16_t) ||
|
---|
| 496 | *buf ++ != LCP_CIT_AUTH ||
|
---|
| 497 | *buf ++ != sizeof(T_PPP_CI_HDR) + sizeof(uint16_t)||
|
---|
| 498 | *((uint16_t*)buf) != htons(PPP_PAP) )
|
---|
| 499 | return false;
|
---|
| 500 | buf += sizeof(uint16_t);
|
---|
| 501 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 502 | }
|
---|
| 503 |
|
---|
| 504 | #endif /* of #ifdef LCP_CFG_PAP */
|
---|
| 505 |
|
---|
| 506 | #ifdef LCP_CFG_PCOMP
|
---|
| 507 |
|
---|
| 508 | /* ãããã³ã«å§ç¸®ãªãã·ã§ã³ã解æããã */
|
---|
| 509 | if (lcp_local_neg_cfg.options & LCP_CFG_PCOMP) {
|
---|
| 510 | if (len < sizeof(T_PPP_CI_HDR) ||
|
---|
| 511 | *buf ++ != LCP_CIT_PCOMP ||
|
---|
| 512 | *buf ++ != sizeof(T_PPP_CI_HDR))
|
---|
| 513 | return false;
|
---|
| 514 | len -= sizeof(T_PPP_CI_HDR);
|
---|
| 515 | }
|
---|
| 516 |
|
---|
| 517 | #endif /* of #ifdef LCP_CFG_PCOMP */
|
---|
| 518 |
|
---|
| 519 | #ifdef LCP_CFG_ACCOMP
|
---|
| 520 |
|
---|
| 521 | /* ã¢ãã¬ã¹ã»å¶å¾¡å§ç¸®ãªãã·ã§ã³ã解æããã */
|
---|
| 522 | if (lcp_local_neg_cfg.options & LCP_CFG_ACCOMP) {
|
---|
| 523 | if (len < sizeof(T_PPP_CI_HDR) ||
|
---|
| 524 | *buf ++ != LCP_CIT_ACCOMP ||
|
---|
| 525 | *buf ++ != sizeof(T_PPP_CI_HDR))
|
---|
| 526 | return false;
|
---|
| 527 | len -= sizeof(T_PPP_CI_HDR);
|
---|
| 528 | }
|
---|
| 529 |
|
---|
| 530 | #endif /* of #ifdef LCP_CFG_ACCOMP */
|
---|
| 531 | return true;
|
---|
| 532 | }
|
---|
| 533 |
|
---|
| 534 | /*
|
---|
| 535 | * lcp_nakci -- NAK ãåä¿¡ããã¨ãã®å¦ç
|
---|
| 536 | *
|
---|
| 537 | * æ»ãå¤: 1 NAK ã¯æ£å¸¸
|
---|
| 538 | * 0 NAK ã¯ç°å¸¸
|
---|
| 539 | */
|
---|
| 540 |
|
---|
| 541 | static int_t
|
---|
| 542 | lcp_nakci (T_PPP_FSM *fsm, T_NET_BUF *input)
|
---|
| 543 | {
|
---|
| 544 | T_LCP_CONFIGS new_cfg;
|
---|
| 545 | bool_t loop = false; /* ã«ã¼ãããã¯ããã§ã㯠*/
|
---|
| 546 | uint32_t cilong;
|
---|
| 547 | uint16_t cishort, len;
|
---|
| 548 | uint8_t *buf, cilen;
|
---|
| 549 |
|
---|
| 550 | buf = input->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR);
|
---|
| 551 | len = input->len - (sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
|
---|
| 552 |
|
---|
| 553 | new_cfg = lcp_local_neg_cfg;
|
---|
| 554 |
|
---|
| 555 | /* MRU ãªãã·ã§ã³ã解æããã */
|
---|
| 556 | if (len >= sizeof(T_PPP_CI_HDR) + sizeof(uint16_t) &&
|
---|
| 557 | * buf == LCP_CIT_MRU &&
|
---|
| 558 | *(buf + 1) == sizeof(T_PPP_CI_HDR) + sizeof(uint16_t) &&
|
---|
| 559 | (lcp_local_neg_cfg.options & LCP_CFG_MRU)) {
|
---|
| 560 | cishort = ntohs(*((uint16_t*)(buf + 2)));
|
---|
| 561 | buf += sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 562 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 563 | if (cishort <= lcp_local_neg_cfg.MRU || cishort <= DEF_PPP_MTU)
|
---|
| 564 | new_cfg.MRU = cishort;
|
---|
| 565 | }
|
---|
| 566 |
|
---|
| 567 | /* ACCM ãªãã·ã§ã³ã解æããã */
|
---|
| 568 | if (len >= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) &&
|
---|
| 569 | * buf == LCP_CIT_ACCM &&
|
---|
| 570 | *(buf + 1) == sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) &&
|
---|
| 571 | (lcp_local_neg_cfg.options & LCP_CFG_ACCM)) {
|
---|
| 572 | ntoahl(cilong, buf + 2);
|
---|
| 573 | buf += sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 574 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 575 | new_cfg.ACCM |= cilong;
|
---|
| 576 | }
|
---|
| 577 |
|
---|
| 578 | #ifdef LCP_CFG_MAGIC
|
---|
| 579 |
|
---|
| 580 | /* Magic Number ãªãã·ã§ã³ã解æããã */
|
---|
| 581 | if (len >= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) &&
|
---|
| 582 | * buf == LCP_CIT_MAGIC &&
|
---|
| 583 | *(buf + 1) == sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) &&
|
---|
| 584 | (lcp_local_neg_cfg.options & LCP_CFG_MAGIC)) {
|
---|
| 585 | ntoahl(cilong, buf + 2);
|
---|
| 586 | buf += sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 587 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 588 | new_cfg.magic = cilong;
|
---|
| 589 | loop = true;
|
---|
| 590 | }
|
---|
| 591 |
|
---|
| 592 | #endif /* of #ifdef LCP_CFG_MAGIC */
|
---|
| 593 |
|
---|
| 594 | #ifdef LCP_CFG_PAP
|
---|
| 595 |
|
---|
| 596 | /* èªè¨¼ãããã³ã«ãªãã·ã§ã³ã解æããã */
|
---|
| 597 | if (len >= sizeof(T_PPP_CI_HDR) + sizeof(uint16_t) &&
|
---|
| 598 | * buf == LCP_CIT_AUTH &&
|
---|
| 599 | *(buf + 1) == sizeof(T_PPP_CI_HDR) + sizeof(uint16_t) &&
|
---|
| 600 | (lcp_local_neg_cfg.options & LCP_CFG_PAP)) {
|
---|
| 601 | cishort = ntohs(*((uint16_t*)(buf + 2)));
|
---|
| 602 | buf += sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 603 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 604 | if (cishort == PPP_PAP)
|
---|
| 605 | new_cfg.options &= ~LCP_CFG_PAP;
|
---|
| 606 | else
|
---|
| 607 | return 0;
|
---|
| 608 | }
|
---|
| 609 |
|
---|
| 610 | #endif /* of #ifdef LCP_CFG_PAP */
|
---|
| 611 |
|
---|
| 612 | #ifdef LCP_CFG_PCOMP
|
---|
| 613 |
|
---|
| 614 | /* ãããã³ã«å§ç¸®ãªãã·ã§ã³ã解æããã */
|
---|
| 615 | if (len >= sizeof(T_PPP_CI_HDR) &&
|
---|
| 616 | * buf == LCP_CIT_PCOMP &&
|
---|
| 617 | *(buf + 1) == sizeof(T_PPP_CI_HDR) &&
|
---|
| 618 | (lcp_local_neg_cfg.options & LCP_CFG_PCOMP)) {
|
---|
| 619 | buf += sizeof(T_PPP_CI_HDR);
|
---|
| 620 | len -= sizeof(T_PPP_CI_HDR);
|
---|
| 621 | new_cfg.options &= ~LCP_CFG_PCOMP;
|
---|
| 622 | }
|
---|
| 623 |
|
---|
| 624 | #endif /* of #ifdef LCP_CFG_PCOMP */
|
---|
| 625 |
|
---|
| 626 | #ifdef LCP_CFG_ACCOMP
|
---|
| 627 |
|
---|
| 628 | /* ã¢ãã¬ã¹ã»å¶å¾¡å§ç¸®ãªãã·ã§ã³ã解æããã */
|
---|
| 629 | if (len >= sizeof(T_PPP_CI_HDR) &&
|
---|
| 630 | * buf == LCP_CIT_ACCOMP &&
|
---|
| 631 | *(buf + 1) == sizeof(T_PPP_CI_HDR) &&
|
---|
| 632 | (lcp_local_neg_cfg.options & LCP_CFG_ACCOMP)) {
|
---|
| 633 | buf += sizeof(T_PPP_CI_HDR);
|
---|
| 634 | len -= sizeof(T_PPP_CI_HDR);
|
---|
| 635 | new_cfg.options &= ~LCP_CFG_ACCOMP;
|
---|
| 636 | }
|
---|
| 637 |
|
---|
| 638 | #endif /* of #ifdef LCP_CFG_ACCOMP */
|
---|
| 639 |
|
---|
| 640 | /* å¾ã¯ç¡è¦ããã*/
|
---|
| 641 | while (len > sizeof(T_PPP_CI_HDR)) {
|
---|
| 642 | cilen = *(buf + 1);
|
---|
| 643 | if (len < cilen)
|
---|
| 644 | return 0;
|
---|
| 645 | buf += cilen;
|
---|
| 646 | len -= cilen;
|
---|
| 647 | }
|
---|
| 648 |
|
---|
| 649 | /* é·ãã 0 ã§ãªããã°ã¨ã©ã¼ */
|
---|
| 650 | if (len != 0)
|
---|
| 651 | return 0;
|
---|
| 652 |
|
---|
| 653 | /* æ°ãããªãã·ã§ã³ãè¨å®ããã*/
|
---|
| 654 | if (fsm->state != PPP_FSM_OPENED) {
|
---|
| 655 | if (loop) {
|
---|
| 656 | syslog(LOG_WARNING, "[PPP/LCP] line looped.");
|
---|
| 657 | lcp_close();
|
---|
| 658 | }
|
---|
| 659 | lcp_local_neg_cfg = new_cfg;
|
---|
| 660 | }
|
---|
| 661 | return 1;
|
---|
| 662 | }
|
---|
| 663 |
|
---|
| 664 | /*
|
---|
| 665 | * lcp_rejci -- REJ ãåä¿¡ããã¨ãã®å¦ç
|
---|
| 666 | *
|
---|
| 667 | * æ»ãå¤: 1 REJ ã¯æ£å¸¸
|
---|
| 668 | * 0 REJ ã¯ç°å¸¸
|
---|
| 669 | */
|
---|
| 670 |
|
---|
| 671 | static int_t
|
---|
| 672 | lcp_rejci (T_PPP_FSM *fsm, T_NET_BUF *input)
|
---|
| 673 | {
|
---|
| 674 | T_LCP_CONFIGS new_cfg;
|
---|
| 675 | uint32_t cilong;
|
---|
| 676 | uint16_t cishort, len;
|
---|
| 677 | uint8_t *buf;
|
---|
| 678 |
|
---|
| 679 | buf = input->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR);
|
---|
| 680 | len = input->len - (sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
|
---|
| 681 |
|
---|
| 682 | new_cfg = lcp_local_neg_cfg;
|
---|
| 683 |
|
---|
| 684 | /* MRU ãªãã·ã§ã³ã解æããã */
|
---|
| 685 | if (len >= sizeof(T_PPP_CI_HDR) + sizeof(uint16_t) &&
|
---|
| 686 | * buf == LCP_CIT_MRU &&
|
---|
| 687 | *(buf + 1) == sizeof(T_PPP_CI_HDR) + sizeof(uint16_t) &&
|
---|
| 688 | (lcp_local_neg_cfg.options & LCP_CFG_MRU)) {
|
---|
| 689 | cishort = ntohs(*((uint16_t*)(buf + 2)));
|
---|
| 690 | buf += sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 691 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 692 | if (cishort != lcp_local_neg_cfg.MRU)
|
---|
| 693 | return 0;
|
---|
| 694 | else
|
---|
| 695 | new_cfg.options &= ~LCP_CFG_MRU;
|
---|
| 696 | }
|
---|
| 697 |
|
---|
| 698 | /* ACCM ãªãã·ã§ã³ã解æããã */
|
---|
| 699 | if (len >= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) &&
|
---|
| 700 | * buf == LCP_CIT_ACCM &&
|
---|
| 701 | *(buf + 1) == sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) &&
|
---|
| 702 | (lcp_local_neg_cfg.options & LCP_CFG_ACCM)) {
|
---|
| 703 | ntoahl(cilong, buf + 2);
|
---|
| 704 | buf += sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 705 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 706 | if (cilong != lcp_local_neg_cfg.ACCM)
|
---|
| 707 | return 0;
|
---|
| 708 | else
|
---|
| 709 | new_cfg.options &= ~LCP_CFG_ACCM;
|
---|
| 710 | }
|
---|
| 711 |
|
---|
| 712 | #ifdef LCP_CFG_MAGIC
|
---|
| 713 |
|
---|
| 714 | /* Magic Number ãªãã·ã§ã³ã解æããã */
|
---|
| 715 | if (len >= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) &&
|
---|
| 716 | * buf == LCP_CIT_MAGIC &&
|
---|
| 717 | *(buf + 1) == sizeof(T_PPP_CI_HDR) + sizeof(uint32_t) &&
|
---|
| 718 | (lcp_local_neg_cfg.options & LCP_CFG_MAGIC)) {
|
---|
| 719 | ntoahl(cilong, buf + 2);
|
---|
| 720 | buf += sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 721 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 722 | if (cilong != lcp_local_neg_cfg.magic)
|
---|
| 723 | return 0;
|
---|
| 724 | else
|
---|
| 725 | new_cfg.options &= ~LCP_CFG_MAGIC;
|
---|
| 726 | }
|
---|
| 727 |
|
---|
| 728 | #endif /* of #ifdef LCP_CFG_MAGIC */
|
---|
| 729 |
|
---|
| 730 | #ifdef LCP_CFG_PAP
|
---|
| 731 |
|
---|
| 732 | /* èªè¨¼ãããã³ã«ãªãã·ã§ã³ã解æããã */
|
---|
| 733 | if (len >= sizeof(T_PPP_CI_HDR) + sizeof(uint16_t) &&
|
---|
| 734 | * buf == LCP_CIT_AUTH &&
|
---|
| 735 | *(buf + 1) == sizeof(T_PPP_CI_HDR) + sizeof(uint16_t) &&
|
---|
| 736 | (lcp_local_neg_cfg.options & LCP_CFG_PAP)) {
|
---|
| 737 | cishort = ntohs(*((uint16_t*)(buf + 2)));
|
---|
| 738 | buf += sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 739 | len -= sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 740 | if (cishort != PPP_PAP)
|
---|
| 741 | return 0;
|
---|
| 742 | else
|
---|
| 743 | new_cfg.options &= ~LCP_CFG_PAP;
|
---|
| 744 | }
|
---|
| 745 |
|
---|
| 746 | #endif /* of #ifdef LCP_CFG_PAP */
|
---|
| 747 |
|
---|
| 748 | #ifdef LCP_CFG_PCOMP
|
---|
| 749 |
|
---|
| 750 | /* ãããã³ã«å§ç¸®ãªãã·ã§ã³ã解æããã */
|
---|
| 751 | if (len >= sizeof(T_PPP_CI_HDR) &&
|
---|
| 752 | * buf == LCP_CIT_PCOMP &&
|
---|
| 753 | *(buf + 1) == sizeof(T_PPP_CI_HDR) &&
|
---|
| 754 | (lcp_local_neg_cfg.options & LCP_CFG_PCOMP)) {
|
---|
| 755 | buf += sizeof(T_PPP_CI_HDR);
|
---|
| 756 | len -= sizeof(T_PPP_CI_HDR);
|
---|
| 757 | new_cfg.options &= ~LCP_CFG_PCOMP;
|
---|
| 758 | }
|
---|
| 759 |
|
---|
| 760 | #endif /* of #ifdef LCP_CFG_PCOMP */
|
---|
| 761 |
|
---|
| 762 | #ifdef LCP_CFG_ACCOMP
|
---|
| 763 |
|
---|
| 764 | /* ã¢ãã¬ã¹ã»å¶å¾¡å§ç¸®ãªãã·ã§ã³ã解æããã */
|
---|
| 765 | if (len >= sizeof(T_PPP_CI_HDR) &&
|
---|
| 766 | * buf == LCP_CIT_ACCOMP &&
|
---|
| 767 | *(buf + 1) == sizeof(T_PPP_CI_HDR) &&
|
---|
| 768 | (lcp_local_neg_cfg.options & LCP_CFG_ACCOMP)) {
|
---|
| 769 | buf += sizeof(T_PPP_CI_HDR);
|
---|
| 770 | len -= sizeof(T_PPP_CI_HDR);
|
---|
| 771 | new_cfg.options &= ~LCP_CFG_ACCOMP;
|
---|
| 772 | }
|
---|
| 773 |
|
---|
| 774 | #endif /* of #ifdef LCP_CFG_ACCOMP */
|
---|
| 775 |
|
---|
| 776 | /* é·ãã 0 ã§ãªããã°ã¨ã©ã¼ */
|
---|
| 777 | if (len != 0)
|
---|
| 778 | return 0;
|
---|
| 779 |
|
---|
| 780 | /* æ°ãããªãã·ã§ã³ãè¨å®ããã*/
|
---|
| 781 | if (fsm->state != PPP_FSM_OPENED)
|
---|
| 782 | lcp_local_neg_cfg = new_cfg;
|
---|
| 783 |
|
---|
| 784 | return 1;
|
---|
| 785 | }
|
---|
| 786 |
|
---|
| 787 | /*
|
---|
| 788 | * lcp_reqci -- ç¸æã®æ§ææ
|
---|
| 789 | å ±ã解æããã
|
---|
| 790 | */
|
---|
| 791 |
|
---|
| 792 | static int_t
|
---|
| 793 | lcp_reqci (T_PPP_FSM *fsm, T_NET_BUF *input, T_NET_BUF *output)
|
---|
| 794 | {
|
---|
| 795 | #if DEF_LCP_REMOTE_CFGS & LCP_CFG_MAGIC
|
---|
| 796 |
|
---|
| 797 | uint32_t cilong;
|
---|
| 798 |
|
---|
| 799 | #endif /* of #if DEF_LCP_REMOTE_CFGS & LCP_CFG_MAGIC */
|
---|
| 800 |
|
---|
| 801 | uint16_t code, final, len, cilen, cishort;
|
---|
| 802 | uint8_t *np, *rp, *ap, *cp, type = 0;
|
---|
| 803 |
|
---|
| 804 | rp = ap = input->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR);
|
---|
| 805 | /* rp: REJãap: ACK ãã CI ã®ãã¤ã³ã¿ */
|
---|
| 806 | /* æå¦ããå ´åã¯ãå¼æ° input ã«ä¸æ¸ãããã */
|
---|
| 807 | len = input->len - (sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
|
---|
| 808 | np = output->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR);
|
---|
| 809 | final = PPP_CONFACK; /* æçµçã«éä¿¡ããã³ã¼ã */
|
---|
| 810 | while (len > 0) {
|
---|
| 811 | code = PPP_CONFACK;
|
---|
| 812 | cp = ap; /* cp: ç¾å¨å¦çä¸ã® CI */
|
---|
| 813 |
|
---|
| 814 | if (len < sizeof(T_PPP_CI_HDR)) {
|
---|
| 815 |
|
---|
| 816 | /* æ®ãã CI ãããããçã */
|
---|
| 817 | syslog(LOG_WARNING, "[PPP/LCP] bad CI len: %d.", len);
|
---|
| 818 | cilen = len; /* ãã¼ã¿é·ãç°å¸¸ã®å ´åã®å¦ç½® */
|
---|
| 819 | len = 0; /* ã«ã¼ãããæããã */
|
---|
| 820 | code = PPP_CONFREJ;
|
---|
| 821 | goto endswitch;
|
---|
| 822 | }
|
---|
| 823 |
|
---|
| 824 | type = *ap ++; /* CI ã®å */
|
---|
| 825 | cilen = *ap ++; /* CI ã®é·ã */
|
---|
| 826 | if (len < cilen) {
|
---|
| 827 |
|
---|
| 828 | /* æ®ãã CI é·ããçã */
|
---|
| 829 | syslog(LOG_WARNING, "[PPP/LCP] bad CI len: %d.", cilen);
|
---|
| 830 | cilen = len; /* ãã¼ã¿é·ãç°å¸¸ã®å ´åã®å¦ç½® */
|
---|
| 831 | len = 0; /* ã«ã¼ãããæããã */
|
---|
| 832 | code = PPP_CONFREJ;
|
---|
| 833 | goto endswitch;
|
---|
| 834 | }
|
---|
| 835 | len -= sizeof(T_PPP_CI_HDR);
|
---|
| 836 |
|
---|
| 837 | /* CI ã®åã«ããåå²ããã*/
|
---|
| 838 | switch (type) {
|
---|
| 839 |
|
---|
| 840 | case LCP_CIT_MRU: /* æ大åä¿¡é (Maximum Receive Unit) */
|
---|
| 841 |
|
---|
| 842 | #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_MRU) == 0
|
---|
| 843 |
|
---|
| 844 | code = PPP_CONFREJ;
|
---|
| 845 |
|
---|
| 846 | #else /* of #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_MRU) == 0 */
|
---|
| 847 |
|
---|
| 848 | /* CI é·ããããã + 2 ãªã¯ãããã§ãªããã° REJ */
|
---|
| 849 | if (cilen != sizeof(T_PPP_CI_HDR) + sizeof(uint16_t))
|
---|
| 850 | code = PPP_CONFREJ;
|
---|
| 851 | {
|
---|
| 852 | cishort = ntohs(*(uint16_t*)ap);
|
---|
| 853 |
|
---|
| 854 | /* æå°åä¿¡éããå°ãããã° NAK */
|
---|
| 855 | if (cishort < MIN_PPP_MTU) {
|
---|
| 856 | *np ++ = LCP_CIT_MRU;
|
---|
| 857 | *np ++ = sizeof(T_PPP_CI_HDR) + sizeof(uint16_t);
|
---|
| 858 | *((uint16_t*)np) = htons(MIN_PPP_MTU);
|
---|
| 859 | np += sizeof(uint16_t);
|
---|
| 860 | code = PPP_CONFNAK;
|
---|
| 861 | }
|
---|
| 862 | else {
|
---|
| 863 | lcp_remote_neg_cfg.MRU = cishort;
|
---|
| 864 | lcp_remote_neg_cfg.options |= LCP_CFG_MRU;
|
---|
| 865 | }
|
---|
| 866 | }
|
---|
| 867 |
|
---|
| 868 | #endif /* of #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_MRU) == 0 */
|
---|
| 869 |
|
---|
| 870 | break;
|
---|
| 871 |
|
---|
| 872 | case LCP_CIT_ACCM: /* Async Control Character Map */
|
---|
| 873 |
|
---|
| 874 | #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_ACCM) == 0
|
---|
| 875 |
|
---|
| 876 | code = PPP_CONFREJ;
|
---|
| 877 |
|
---|
| 878 | #else /* of #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_ACCM) == 0 */
|
---|
| 879 |
|
---|
| 880 | /* CI é·ããããã + 4 ãªã¯ãããã§ãªããã° REJ */
|
---|
| 881 | if (cilen != sizeof(T_PPP_CI_HDR) + sizeof(uint32_t))
|
---|
| 882 | code = PPP_CONFREJ;
|
---|
| 883 | else {
|
---|
| 884 | ntoahl(lcp_remote_neg_cfg.ACCM, ap);
|
---|
| 885 | lcp_remote_neg_cfg.options |= LCP_CFG_ACCM;
|
---|
| 886 | }
|
---|
| 887 |
|
---|
| 888 | #endif /* of #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_ACCM) == 0 */
|
---|
| 889 |
|
---|
| 890 | break;
|
---|
| 891 |
|
---|
| 892 | case LCP_CIT_MAGIC: /* ãã¸ãã¯çªå· */
|
---|
| 893 |
|
---|
| 894 | #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_MAGIC) == 0
|
---|
| 895 |
|
---|
| 896 | code = PPP_CONFREJ;
|
---|
| 897 |
|
---|
| 898 | #else /* of #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_MAGIC) == 0 */
|
---|
| 899 |
|
---|
| 900 | /* CI é·ããããã + 4 ãªã¯ãããã§ãªããã° REJ */
|
---|
| 901 | if (cilen != sizeof(T_PPP_CI_HDR) + sizeof(uint32_t))
|
---|
| 902 | code = PPP_CONFREJ;
|
---|
| 903 | else {
|
---|
| 904 | ntoahl(cilong, ap);
|
---|
| 905 |
|
---|
| 906 | /* çªå·ãèªåã¨åããªã NAK */
|
---|
| 907 | if (cilong == lcp_local_neg_cfg.magic) {
|
---|
| 908 | cilong = net_rand();
|
---|
| 909 | *np ++ = LCP_CIT_MAGIC;
|
---|
| 910 | *np ++ = sizeof(T_PPP_CI_HDR) + sizeof(uint32_t);
|
---|
| 911 | ahtonl(np, cilong);
|
---|
| 912 | np += sizeof(uint32_t);
|
---|
| 913 | code = PPP_CONFNAK;
|
---|
| 914 | }
|
---|
| 915 | else {
|
---|
| 916 | lcp_remote_neg_cfg.magic = cilong;
|
---|
| 917 | lcp_remote_neg_cfg.options |= LCP_CFG_MAGIC;
|
---|
| 918 | }
|
---|
| 919 | }
|
---|
| 920 |
|
---|
| 921 | #endif /* of #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_MAGIC) == 0 */
|
---|
| 922 |
|
---|
| 923 | break;
|
---|
| 924 |
|
---|
| 925 | #ifdef LCP_CFG_PAP
|
---|
| 926 | /* CHAP ã¯å®è£
|
---|
| 927 | äºå® */
|
---|
| 928 |
|
---|
| 929 | case LCP_CIT_AUTH: /* èªè¨¼ãããã³ã« */
|
---|
| 930 |
|
---|
| 931 | /* CI é·ããããã + 2 ãªã¯ãããããçãã¨ãã¯ã¨ã©ã¼ */
|
---|
| 932 | if (cilen < sizeof(T_PPP_CI_HDR) + sizeof(uint16_t))
|
---|
| 933 | code = PPP_CONFREJ;
|
---|
| 934 | else {
|
---|
| 935 | cishort = ntohs(*(uint16_t*)ap);
|
---|
| 936 |
|
---|
| 937 | /* èªè¨¼ãããã³ã«ã«ããåå²ãã */
|
---|
| 938 | if (cishort == PPP_PAP &&
|
---|
| 939 | cilen == sizeof(T_PPP_CI_HDR) + sizeof(uint16_t) &&
|
---|
| 940 | (DEF_LCP_REMOTE_CFGS & LCP_CFG_PAP) != 0)
|
---|
| 941 | lcp_remote_neg_cfg.options |= LCP_CFG_PAP;
|
---|
| 942 | else
|
---|
| 943 | code = PPP_CONFREJ;
|
---|
| 944 | }
|
---|
| 945 | break;
|
---|
| 946 |
|
---|
| 947 | #endif /* of #ifdef LCP_CFG_PAP */
|
---|
| 948 |
|
---|
| 949 | #ifdef LCP_CFG_PCOMP
|
---|
| 950 |
|
---|
| 951 | case LCP_CIT_PCOMP: /* ãããã³ã«é¨å§ç¸®ã¯å®è£
|
---|
| 952 | äºå® */
|
---|
| 953 |
|
---|
| 954 | #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_PCOMP) == 0
|
---|
| 955 |
|
---|
| 956 | code = PPP_CONFREJ;
|
---|
| 957 |
|
---|
| 958 | #else /* of #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_PCOMP) == 0 */
|
---|
| 959 |
|
---|
| 960 | /* CI é·ãããããé·ã ãã§ãªããã° REJ */
|
---|
| 961 | if (cilen != sizeof(T_PPP_CI_HDR))
|
---|
| 962 | code = PPP_CONFREJ;
|
---|
| 963 | else
|
---|
| 964 | lcp_remote_neg_cfg.options |= LCP_CFG_PCOMP;
|
---|
| 965 |
|
---|
| 966 | #endif /* of #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_PCOMP) == 0 */
|
---|
| 967 |
|
---|
| 968 | break;
|
---|
| 969 |
|
---|
| 970 | #endif /* of #ifdef LCP_CFG_PCOMP */
|
---|
| 971 |
|
---|
| 972 | #ifdef LCP_CFG_ACCOMP
|
---|
| 973 |
|
---|
| 974 | case LCP_CIT_ACCOMP: /* ã¢ãã¬ã¹ã»å¶å¾¡é¨å§ç¸® */
|
---|
| 975 |
|
---|
| 976 | #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_ACCOMP) == 0
|
---|
| 977 |
|
---|
| 978 | code = PPP_CONFREJ;
|
---|
| 979 |
|
---|
| 980 | #else /* of #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_ACCOMP) == 0 */
|
---|
| 981 |
|
---|
| 982 | /* CI é·ãããããé·ã ãã§ãªããã° REJ */
|
---|
| 983 | if (cilen != sizeof(T_PPP_CI_HDR))
|
---|
| 984 | code = PPP_CONFREJ;
|
---|
| 985 | else
|
---|
| 986 | lcp_remote_neg_cfg.options |= LCP_CFG_ACCOMP;
|
---|
| 987 |
|
---|
| 988 | #endif /* of #if (DEF_LCP_REMOTE_CFGS & LCP_CFG_ACCOMP) == 0 */
|
---|
| 989 |
|
---|
| 990 | break;
|
---|
| 991 |
|
---|
| 992 | #endif /* of #ifdef LCP_CFG_ACCOMP */
|
---|
| 993 |
|
---|
| 994 | default:
|
---|
| 995 | syslog(LOG_WARNING, "[PPP/LCP] unexp opt: %d.", type);
|
---|
| 996 | code = PPP_CONFREJ;
|
---|
| 997 | break;
|
---|
| 998 | }
|
---|
| 999 | endswitch:
|
---|
| 1000 | if (code == PPP_CONFNAK) {
|
---|
| 1001 | /* CI ã®åã Magic Number ã®å ´åãé¤ãã¦ãNAK ã®åæ°ã */
|
---|
| 1002 | /* æå¤§å¤ MAX_PPP_FAILURES ãè¶
|
---|
| 1003 | ãããæå¦ããã */
|
---|
| 1004 | if (fsm->failures >= MAX_PPP_FAILURES && type != LCP_CIT_MAGIC)
|
---|
| 1005 | code = PPP_CONFREJ;
|
---|
| 1006 | else if (final != PPP_CONFREJ)
|
---|
| 1007 | final = PPP_CONFNAK;
|
---|
| 1008 | }
|
---|
| 1009 |
|
---|
| 1010 | /* ãã® CI ãæå¦ãã */
|
---|
| 1011 | if (code == PPP_CONFREJ) {
|
---|
| 1012 | if (rp < cp) /* åã«è©°ããã*/
|
---|
| 1013 | memcpy(rp, cp, cilen);
|
---|
| 1014 | rp += cilen;
|
---|
| 1015 | final = PPP_CONFREJ;
|
---|
| 1016 | }
|
---|
| 1017 |
|
---|
| 1018 | ap += cilen - sizeof(T_PPP_CI_HDR);
|
---|
| 1019 | len -= cilen - sizeof(T_PPP_CI_HDR);
|
---|
| 1020 | }
|
---|
| 1021 |
|
---|
| 1022 | /* æçµçãªé·ãã調æ´ããã*/
|
---|
| 1023 | switch (final) {
|
---|
| 1024 | case PPP_CONFNAK:
|
---|
| 1025 | output->len = np - output->buf;
|
---|
| 1026 | memcpy(output->buf, input->buf, sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
|
---|
| 1027 | break;
|
---|
| 1028 | case PPP_CONFREJ:
|
---|
| 1029 | memcpy(output->buf, input->buf, output->len = rp - input->buf);
|
---|
| 1030 | break;
|
---|
| 1031 | case PPP_CONFACK:
|
---|
| 1032 | memcpy(output->buf, input->buf, input->len);
|
---|
| 1033 | break;
|
---|
| 1034 | }
|
---|
| 1035 | return final;
|
---|
| 1036 | }
|
---|
| 1037 |
|
---|
| 1038 | /*
|
---|
| 1039 | * lcp_up -- ãªã³ã¯æ¥ç¶ã確ç«ãã (Phase: Establish ã«ç§»è¡ãã)ã
|
---|
| 1040 | */
|
---|
| 1041 |
|
---|
| 1042 | static void
|
---|
| 1043 | lcp_up (T_PPP_FSM *fsm)
|
---|
| 1044 | {
|
---|
| 1045 | /* èªæ§ææ
|
---|
| 1046 | å ±ã®è¨å® */
|
---|
| 1047 | lcp_local_ack_cfg = lcp_local_neg_cfg;
|
---|
| 1048 |
|
---|
| 1049 | /* ç¸æã®æ§ææ
|
---|
| 1050 | å ±ã®è¨å® */
|
---|
| 1051 | lcp_remote_ack_cfg = lcp_remote_neg_cfg;
|
---|
| 1052 |
|
---|
| 1053 | #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC
|
---|
| 1054 |
|
---|
| 1055 | echo_lowerup();
|
---|
| 1056 |
|
---|
| 1057 | #endif /* of #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC */
|
---|
| 1058 |
|
---|
| 1059 | link_established();
|
---|
| 1060 | }
|
---|
| 1061 |
|
---|
| 1062 | /*
|
---|
| 1063 | * lcp_starting -- ä¸ä½å±¤ãéå§ããã
|
---|
| 1064 | */
|
---|
| 1065 |
|
---|
| 1066 | static void
|
---|
| 1067 | lcp_starting (T_PPP_FSM *fsm)
|
---|
| 1068 | {
|
---|
| 1069 | link_required();
|
---|
| 1070 | }
|
---|
| 1071 |
|
---|
| 1072 | /*
|
---|
| 1073 | * lcp_extcode -- LCP ç¹æã® CP ãåä¿¡ããã¨ãã®å¦ç
|
---|
| 1074 | */
|
---|
| 1075 |
|
---|
| 1076 | static bool_t
|
---|
| 1077 | lcp_extcode (T_PPP_FSM *fsm, uint8_t code, uint8_t id, T_NET_BUF *input)
|
---|
| 1078 | {
|
---|
| 1079 | #if DEF_LCP_REMOTE_CFGS & LCP_CFG_MAGIC
|
---|
| 1080 |
|
---|
| 1081 | T_NET_BUF *output;
|
---|
| 1082 |
|
---|
| 1083 | #endif /* of #if DEF_LCP_REMOTE_CFGS & LCP_CFG_MAGIC */
|
---|
| 1084 |
|
---|
| 1085 | switch (code) {
|
---|
| 1086 | case PPP_PROTREJ:
|
---|
| 1087 | lcp_rprotrej(fsm, input);
|
---|
| 1088 | break;
|
---|
| 1089 |
|
---|
| 1090 | case PPP_ECHOREQ:
|
---|
| 1091 |
|
---|
| 1092 | #if DEF_LCP_REMOTE_CFGS & LCP_CFG_MAGIC
|
---|
| 1093 |
|
---|
| 1094 | if (fsm->state == PPP_FSM_OPENED) {
|
---|
| 1095 | syscall(get_net_buf(&output, sizeof(T_PPP_HDR)
|
---|
| 1096 | + sizeof(T_PPP_CP_HDR)
|
---|
| 1097 | + sizeof(uint32_t)));
|
---|
| 1098 | *(uint32_t*)(output->buf + sizeof(T_PPP_HDR)
|
---|
| 1099 | + sizeof(T_PPP_CP_HDR)) = lcp_local_ack_cfg.magic;
|
---|
| 1100 | IF_SET_PROTO(output, PPP_LCP);
|
---|
| 1101 | ppp_cp_output(PPP_ECHOREP, id, output);
|
---|
| 1102 | }
|
---|
| 1103 |
|
---|
| 1104 | #endif /* of #if DEF_LCP_REMOTE_CFGS & LCP_CFG_MAGIC */
|
---|
| 1105 |
|
---|
| 1106 | break;
|
---|
| 1107 |
|
---|
| 1108 | case PPP_ECHOREP:
|
---|
| 1109 |
|
---|
| 1110 | #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC
|
---|
| 1111 |
|
---|
| 1112 | recv_echo_rep(fsm, id, input);
|
---|
| 1113 |
|
---|
| 1114 | #endif /* of #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC */
|
---|
| 1115 |
|
---|
| 1116 | break;
|
---|
| 1117 |
|
---|
| 1118 | case PPP_DISCREQ:
|
---|
| 1119 | break;
|
---|
| 1120 |
|
---|
| 1121 | default:
|
---|
| 1122 | return false;
|
---|
| 1123 | break;
|
---|
| 1124 |
|
---|
| 1125 | }
|
---|
| 1126 | return true;
|
---|
| 1127 | }
|
---|
| 1128 |
|
---|
| 1129 | /*
|
---|
| 1130 | * lcp_rprotrej -- Proto-REJ ãåä¿¡ããã¨ãã®å¦ç
|
---|
| 1131 | */
|
---|
| 1132 |
|
---|
| 1133 | static void
|
---|
| 1134 | lcp_rprotrej (T_PPP_FSM *fsm, T_NET_BUF *input)
|
---|
| 1135 | {
|
---|
| 1136 | T_PPP_PROTENT *entry;
|
---|
| 1137 | int_t ix;
|
---|
| 1138 | uint16_t proto;
|
---|
| 1139 |
|
---|
| 1140 | if (input->len < sizeof(uint16_t)) {
|
---|
| 1141 | syslog(LOG_WARNING, "[PPP/LCP] bad len: %d in recv Proto-REJ.");
|
---|
| 1142 | return;
|
---|
| 1143 | }
|
---|
| 1144 |
|
---|
| 1145 | proto = ntohs(*GET_PPP_HDR(input));
|
---|
| 1146 |
|
---|
| 1147 | if (fsm->state != PPP_FSM_OPENED) {
|
---|
| 1148 | return;
|
---|
| 1149 | }
|
---|
| 1150 |
|
---|
| 1151 | /* ä¸ä½ãããã³ã«ãåæåãã */
|
---|
| 1152 | for (ix = 0; (entry = protocols[ix]) != NULL; ix ++)
|
---|
| 1153 | if (entry->proto == proto) {
|
---|
| 1154 | (*entry->protrej)();
|
---|
| 1155 | return;
|
---|
| 1156 | }
|
---|
| 1157 |
|
---|
| 1158 | syslog(LOG_WARNING, "[PPP/LCP] unexp proto: %d in recv Proto-REJ.", proto);
|
---|
| 1159 | }
|
---|
| 1160 |
|
---|
| 1161 | /*
|
---|
| 1162 | * lcp_protrej -- Proto-REJ ãåä¿¡ããã¨ãã®å¦ç
|
---|
| 1163 | */
|
---|
| 1164 |
|
---|
| 1165 | static void
|
---|
| 1166 | lcp_protrej (void)
|
---|
| 1167 | {
|
---|
| 1168 | fsm_protreject(&lcp_fsm);
|
---|
| 1169 | }
|
---|
| 1170 |
|
---|
| 1171 | /*
|
---|
| 1172 | * lcp_lowerup -- LCP ä¸ä½å±¤ãèµ·åããã
|
---|
| 1173 | */
|
---|
| 1174 |
|
---|
| 1175 | void
|
---|
| 1176 | lcp_lowerup (void)
|
---|
| 1177 | {
|
---|
| 1178 | fsm_lowerup(&lcp_fsm);
|
---|
| 1179 | }
|
---|
| 1180 |
|
---|
| 1181 | /*
|
---|
| 1182 | * lcp_lowerdown -- LCP ä¸ä½å±¤ãåæ¢ããã
|
---|
| 1183 | */
|
---|
| 1184 |
|
---|
| 1185 | void
|
---|
| 1186 | lcp_lowerdown (void)
|
---|
| 1187 | {
|
---|
| 1188 | fsm_lowerdown(&lcp_fsm);
|
---|
| 1189 | }
|
---|
| 1190 |
|
---|
| 1191 | /*
|
---|
| 1192 | * lcp_open -- LCP ã®ãªã¼ã
|
---|
| 1193 | */
|
---|
| 1194 |
|
---|
| 1195 | void
|
---|
| 1196 | lcp_open (uint8_t open_mode)
|
---|
| 1197 | {
|
---|
| 1198 | ppp_open_mode = open_mode; /* ãªã¼ãã³æã®åä½ã¢ã¼ã */
|
---|
| 1199 | fsm_open(&lcp_fsm);
|
---|
| 1200 | }
|
---|
| 1201 |
|
---|
| 1202 | /*
|
---|
| 1203 | * lcp_close -- LCP ã®ã¯ãã¼ãº
|
---|
| 1204 | */
|
---|
| 1205 |
|
---|
| 1206 | void
|
---|
| 1207 | lcp_close (void)
|
---|
| 1208 | {
|
---|
| 1209 | if (ppp_phase != PPP_PHASE_DEAD)
|
---|
| 1210 | ppp_phase = PPP_PHASE_TERMINATE;
|
---|
| 1211 |
|
---|
| 1212 | if (ppp_open_mode == PPP_OPEN_PASSIVE && lcp_fsm.state == PPP_FSM_STOPPED) {
|
---|
| 1213 | lcp_fsm.state = PPP_FSM_CLOSED;
|
---|
| 1214 | lcp_finished(&lcp_fsm);
|
---|
| 1215 | }
|
---|
| 1216 | else
|
---|
| 1217 | fsm_close(&lcp_fsm);
|
---|
| 1218 | }
|
---|
| 1219 |
|
---|
| 1220 | /*
|
---|
| 1221 | * lcp_sprotrej -- èªèã§ããªããããã³ã«ãéããã¦ããã¨ãã®å¦ç
|
---|
| 1222 | */
|
---|
| 1223 |
|
---|
| 1224 | void
|
---|
| 1225 | lcp_sprotrej (T_NET_BUF *input)
|
---|
| 1226 | {
|
---|
| 1227 | T_NET_BUF *output;
|
---|
| 1228 | /*
|
---|
| 1229 | * Protocol-Reject ãéãè¿ãã
|
---|
| 1230 | */
|
---|
| 1231 |
|
---|
| 1232 | syscall(get_net_buf(&output, input->len + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR)));
|
---|
| 1233 |
|
---|
| 1234 | memcpy(output->buf, input->buf, sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
|
---|
| 1235 | memcpy(output->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR), input->buf, input->len);
|
---|
| 1236 |
|
---|
| 1237 | IF_SET_PROTO(output, PPP_LCP);
|
---|
| 1238 | ppp_cp_output(PPP_PROTREJ, ++ lcp_fsm.id, output);
|
---|
| 1239 | }
|
---|
| 1240 |
|
---|
| 1241 | /*
|
---|
| 1242 | * lcp_down -- ãªã³ã¯æ¥ç¶ã解æ¾ãã (Phase: Dead ã«ç§»è¡ãã)ã
|
---|
| 1243 | */
|
---|
| 1244 |
|
---|
| 1245 | void
|
---|
| 1246 | lcp_down (T_PPP_FSM *fsm)
|
---|
| 1247 | {
|
---|
| 1248 |
|
---|
| 1249 | #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC
|
---|
| 1250 |
|
---|
| 1251 | echo_lowerdown();
|
---|
| 1252 |
|
---|
| 1253 | #endif /* of #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC */
|
---|
| 1254 |
|
---|
| 1255 | link_down();
|
---|
| 1256 | }
|
---|
| 1257 |
|
---|
| 1258 | /*
|
---|
| 1259 | * lcp_finished -- ä¸ä½å±¤ãçµäºããã
|
---|
| 1260 | */
|
---|
| 1261 |
|
---|
| 1262 | void
|
---|
| 1263 | lcp_finished (T_PPP_FSM *fsm)
|
---|
| 1264 | {
|
---|
| 1265 | link_terminated();
|
---|
| 1266 | }
|
---|
| 1267 |
|
---|
| 1268 | #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC
|
---|
| 1269 |
|
---|
| 1270 | /*
|
---|
| 1271 | * recv_echo_rep -- ECHOREP ãåä¿¡ããã¨ãã®å¦ç
|
---|
| 1272 | */
|
---|
| 1273 |
|
---|
| 1274 | static void
|
---|
| 1275 | recv_echo_rep(T_PPP_FSM *fsm, uint8_t id, T_NET_BUF *input)
|
---|
| 1276 | {
|
---|
| 1277 | T_PPP_CP_HDR *hdr;
|
---|
| 1278 | uint32_t magic;
|
---|
| 1279 |
|
---|
| 1280 | hdr = GET_PPP_CP_HDR(input);
|
---|
| 1281 |
|
---|
| 1282 | /* Magic Number ã®é·ã以ä¸ãªãã¨ã©ã¼ */
|
---|
| 1283 | if (hdr->len < sizeof(T_PPP_CP_HDR) + sizeof(uint32_t)) {
|
---|
| 1284 | syslog(LOG_WARNING, "[PPP/LCP] bad ECHOREP len: %d.", hdr->len);
|
---|
| 1285 | return;
|
---|
| 1286 | }
|
---|
| 1287 |
|
---|
| 1288 | ntoahl(magic, input->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR));
|
---|
| 1289 |
|
---|
| 1290 | /* åä¿¡ãã Magic Number ãèªåã¨åããªãã«ã¼ããã¦ããã*/
|
---|
| 1291 | if ((lcp_local_ack_cfg.options & LCP_CFG_MAGIC) && magic == lcp_local_ack_cfg.magic) {
|
---|
| 1292 | syslog(LOG_WARNING, "[PPP/LCP] ECHOREP looped.");
|
---|
| 1293 | return;
|
---|
| 1294 | }
|
---|
| 1295 |
|
---|
| 1296 | echo_pending = 0;
|
---|
| 1297 | }
|
---|
| 1298 |
|
---|
| 1299 | /*
|
---|
| 1300 | * echo_timeout -- ECHO REQ/REP ã®ã¿ã¤ã ã¢ã¦ãå¦ç
|
---|
| 1301 | */
|
---|
| 1302 |
|
---|
| 1303 | static void
|
---|
| 1304 | echo_timeout (void *arg)
|
---|
| 1305 | {
|
---|
| 1306 | if (timer_running) {
|
---|
| 1307 | timer_running = false;
|
---|
| 1308 | send_echo_req((T_PPP_FSM *)arg);
|
---|
| 1309 | }
|
---|
| 1310 | }
|
---|
| 1311 |
|
---|
| 1312 | /*
|
---|
| 1313 | * send_echo_req -- ECHO REQ ãéä¿¡ããã
|
---|
| 1314 | */
|
---|
| 1315 |
|
---|
| 1316 | static void
|
---|
| 1317 | send_echo_req (T_PPP_FSM *fsm)
|
---|
| 1318 | {
|
---|
| 1319 | T_NET_BUF *input;
|
---|
| 1320 |
|
---|
| 1321 | #if LCP_ECHO_FAILS > 0
|
---|
| 1322 |
|
---|
| 1323 | if (echo_pending >= LCP_ECHO_FAILS) {
|
---|
| 1324 | syslog(LOG_WARNING, "[PPP/LCP] no reply to ECHOREQ.");
|
---|
| 1325 | lcp_close();
|
---|
| 1326 | echo_pending = 0;
|
---|
| 1327 | }
|
---|
| 1328 |
|
---|
| 1329 | #endif /* of #if LCP_ECHO_FAILS > 0 */
|
---|
| 1330 |
|
---|
| 1331 | if (fsm->state == PPP_FSM_OPENED) {
|
---|
| 1332 |
|
---|
| 1333 | /* ECHOREQ ãéä¿¡ããã*/
|
---|
| 1334 | syscall(get_net_buf(&input, sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR) + sizeof(uint32_t)));
|
---|
| 1335 | *(uint32_t*)(input->buf + sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR)) = lcp_local_ack_cfg.magic;
|
---|
| 1336 | IF_SET_PROTO(input, PPP_LCP);
|
---|
| 1337 | ppp_cp_output(PPP_ECHOREQ, echo_number ++, input);
|
---|
| 1338 | echo_pending ++;
|
---|
| 1339 |
|
---|
| 1340 | /* ã¿ã¤ãã¼ãã¹ã¿ã¼ãããã*/
|
---|
| 1341 | timeout((FP)echo_timeout, fsm, LCP_ECHO_INTERVAL);
|
---|
| 1342 | timer_running = true;
|
---|
| 1343 | }
|
---|
| 1344 | }
|
---|
| 1345 |
|
---|
| 1346 | /*
|
---|
| 1347 | * echo_lowerup -- ECHO REQ/REP ã®èµ·å
|
---|
| 1348 | */
|
---|
| 1349 |
|
---|
| 1350 | static void
|
---|
| 1351 | echo_lowerup (void)
|
---|
| 1352 | {
|
---|
| 1353 | echo_pending = 0;
|
---|
| 1354 | echo_number = 0;
|
---|
| 1355 | timer_running = false;
|
---|
| 1356 |
|
---|
| 1357 | send_echo_req(&lcp_fsm);
|
---|
| 1358 | }
|
---|
| 1359 |
|
---|
| 1360 | /*
|
---|
| 1361 | * echo_lowerdown -- ECHO REQ/REP ã®åæ¢
|
---|
| 1362 | */
|
---|
| 1363 |
|
---|
| 1364 | static void
|
---|
| 1365 | echo_lowerdown (void)
|
---|
| 1366 | {
|
---|
| 1367 | if (timer_running) {
|
---|
| 1368 | untimeout((FP)echo_timeout, &lcp_fsm);
|
---|
| 1369 | timer_running = false;
|
---|
| 1370 | }
|
---|
| 1371 | }
|
---|
| 1372 |
|
---|
| 1373 | #endif /* of #if DEF_LCP_LOCAL_CFGS & LCP_CFG_MAGIC */
|
---|
| 1374 |
|
---|
| 1375 | #endif /* fo #ifdef SUPPORT_PPP */
|
---|