Murat Kilivan / Mbed 2 deprecated HTMLServer_Sample

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Dependencies:   EthernetInterface HttpServer mbed-rpc mbed-rtos mbed

Fork of giken9_HTMLServer_Sample by Yasushi TAUCHI

EthernetInterface/lwip/netif/ppp/lcp.c@2:14b689a85306, 2014-03-12 (annotated)

Committer:
yueee_yt
Date:
Wed Mar 12 04:39:15 2014 +0000
Revision:
2:14b689a85306
Parent:
0:7766f6712673 
bug fix

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yueee_yt 0:7766f6712673 1 /*****************************************************************************
yueee_yt 0:7766f6712673 2 * lcp.c - Network Link Control Protocol program file.
yueee_yt 0:7766f6712673 3 *
yueee_yt 0:7766f6712673 4 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
yueee_yt 0:7766f6712673 5 * portions Copyright (c) 1997 by Global Election Systems Inc.
yueee_yt 0:7766f6712673 6 *
yueee_yt 0:7766f6712673 7 * The authors hereby grant permission to use, copy, modify, distribute,
yueee_yt 0:7766f6712673 8 * and license this software and its documentation for any purpose, provided
yueee_yt 0:7766f6712673 9 * that existing copyright notices are retained in all copies and that this
yueee_yt 0:7766f6712673 10 * notice and the following disclaimer are included verbatim in any
yueee_yt 0:7766f6712673 11 * distributions. No written agreement, license, or royalty fee is required
yueee_yt 0:7766f6712673 12 * for any of the authorized uses.
yueee_yt 0:7766f6712673 13 *
yueee_yt 0:7766f6712673 14 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
yueee_yt 0:7766f6712673 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
yueee_yt 0:7766f6712673 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
yueee_yt 0:7766f6712673 17 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
yueee_yt 0:7766f6712673 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
yueee_yt 0:7766f6712673 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
yueee_yt 0:7766f6712673 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
yueee_yt 0:7766f6712673 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
yueee_yt 0:7766f6712673 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
yueee_yt 0:7766f6712673 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
yueee_yt 0:7766f6712673 24 *
yueee_yt 0:7766f6712673 25 ******************************************************************************
yueee_yt 0:7766f6712673 26 * REVISION HISTORY
yueee_yt 0:7766f6712673 27 *
yueee_yt 0:7766f6712673 28 * 03-01-01 Marc Boucher <marc@mbsi.ca>
yueee_yt 0:7766f6712673 29 * Ported to lwIP.
yueee_yt 0:7766f6712673 30 * 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
yueee_yt 0:7766f6712673 31 * Original.
yueee_yt 0:7766f6712673 32 *****************************************************************************/
yueee_yt 0:7766f6712673 33
yueee_yt 0:7766f6712673 34 /*
yueee_yt 0:7766f6712673 35 * lcp.c - PPP Link Control Protocol.
yueee_yt 0:7766f6712673 36 *
yueee_yt 0:7766f6712673 37 * Copyright (c) 1989 Carnegie Mellon University.
yueee_yt 0:7766f6712673 38 * All rights reserved.
yueee_yt 0:7766f6712673 39 *
yueee_yt 0:7766f6712673 40 * Redistribution and use in source and binary forms are permitted
yueee_yt 0:7766f6712673 41 * provided that the above copyright notice and this paragraph are
yueee_yt 0:7766f6712673 42 * duplicated in all such forms and that any documentation,
yueee_yt 0:7766f6712673 43 * advertising materials, and other materials related to such
yueee_yt 0:7766f6712673 44 * distribution and use acknowledge that the software was developed
yueee_yt 0:7766f6712673 45 * by Carnegie Mellon University. The name of the
yueee_yt 0:7766f6712673 46 * University may not be used to endorse or promote products derived
yueee_yt 0:7766f6712673 47 * from this software without specific prior written permission.
yueee_yt 0:7766f6712673 48 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
yueee_yt 0:7766f6712673 49 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
yueee_yt 0:7766f6712673 50 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
yueee_yt 0:7766f6712673 51 */
yueee_yt 0:7766f6712673 52
yueee_yt 0:7766f6712673 53
yueee_yt 0:7766f6712673 54 #include "lwip/opt.h"
yueee_yt 0:7766f6712673 55
yueee_yt 0:7766f6712673 56 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
yueee_yt 0:7766f6712673 57
yueee_yt 0:7766f6712673 58 #include "ppp.h"
yueee_yt 0:7766f6712673 59 #include "pppdebug.h"
yueee_yt 0:7766f6712673 60
yueee_yt 0:7766f6712673 61 #include "fsm.h"
yueee_yt 0:7766f6712673 62 #include "chap.h"
yueee_yt 0:7766f6712673 63 #include "magic.h"
yueee_yt 0:7766f6712673 64 #include "auth.h"
yueee_yt 0:7766f6712673 65 #include "lcp.h"
yueee_yt 0:7766f6712673 66
yueee_yt 0:7766f6712673 67 #include <string.h>
yueee_yt 0:7766f6712673 68
yueee_yt 0:7766f6712673 69 #if PPPOE_SUPPORT
yueee_yt 0:7766f6712673 70 #include "netif/ppp_oe.h"
yueee_yt 0:7766f6712673 71 #else
yueee_yt 0:7766f6712673 72 #define PPPOE_MAXMTU PPP_MAXMRU
yueee_yt 0:7766f6712673 73 #endif
yueee_yt 0:7766f6712673 74
yueee_yt 0:7766f6712673 75 #if 0 /* UNUSED */
yueee_yt 0:7766f6712673 76 /*
yueee_yt 0:7766f6712673 77 * LCP-related command-line options.
yueee_yt 0:7766f6712673 78 */
yueee_yt 0:7766f6712673 79 int lcp_echo_interval = 0; /* Interval between LCP echo-requests */
yueee_yt 0:7766f6712673 80 int lcp_echo_fails = 0; /* Tolerance to unanswered echo-requests */
yueee_yt 0:7766f6712673 81 bool lax_recv = 0; /* accept control chars in asyncmap */
yueee_yt 0:7766f6712673 82
yueee_yt 0:7766f6712673 83 static int setescape (char **);
yueee_yt 0:7766f6712673 84
yueee_yt 0:7766f6712673 85 static option_t lcp_option_list[] = {
yueee_yt 0:7766f6712673 86 /* LCP options */
yueee_yt 0:7766f6712673 87 /* list stripped for simplicity */
yueee_yt 0:7766f6712673 88 {NULL}
yueee_yt 0:7766f6712673 89 };
yueee_yt 0:7766f6712673 90 #endif /* UNUSED */
yueee_yt 0:7766f6712673 91
yueee_yt 0:7766f6712673 92 /* options */
yueee_yt 0:7766f6712673 93 LinkPhase lcp_phase[NUM_PPP]; /* Phase of link session (RFC 1661) */
yueee_yt 0:7766f6712673 94 static u_int lcp_echo_interval = LCP_ECHOINTERVAL; /* Interval between LCP echo-requests */
yueee_yt 0:7766f6712673 95 static u_int lcp_echo_fails = LCP_MAXECHOFAILS; /* Tolerance to unanswered echo-requests */
yueee_yt 0:7766f6712673 96
yueee_yt 0:7766f6712673 97 /* global vars */
yueee_yt 0:7766f6712673 98 static fsm lcp_fsm[NUM_PPP]; /* LCP fsm structure (global)*/
yueee_yt 0:7766f6712673 99 lcp_options lcp_wantoptions[NUM_PPP]; /* Options that we want to request */
yueee_yt 0:7766f6712673 100 lcp_options lcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
yueee_yt 0:7766f6712673 101 lcp_options lcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
yueee_yt 0:7766f6712673 102 lcp_options lcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
yueee_yt 0:7766f6712673 103 ext_accm xmit_accm[NUM_PPP]; /* extended transmit ACCM */
yueee_yt 0:7766f6712673 104
yueee_yt 0:7766f6712673 105 static u32_t lcp_echos_pending = 0; /* Number of outstanding echo msgs */
yueee_yt 0:7766f6712673 106 static u32_t lcp_echo_number = 0; /* ID number of next echo frame */
yueee_yt 0:7766f6712673 107 static u32_t lcp_echo_timer_running = 0; /* TRUE if a timer is running */
yueee_yt 0:7766f6712673 108
yueee_yt 0:7766f6712673 109 /* @todo: do we really need such a large buffer? The typical 1500 bytes seem too much. */
yueee_yt 0:7766f6712673 110 static u_char nak_buffer[PPP_MRU] __attribute((section("AHBSRAM1"))); /* where we construct a nak packet */
yueee_yt 0:7766f6712673 111
yueee_yt 0:7766f6712673 112 /*
yueee_yt 0:7766f6712673 113 * Callbacks for fsm code. (CI = Configuration Information)
yueee_yt 0:7766f6712673 114 */
yueee_yt 0:7766f6712673 115 static void lcp_resetci (fsm*); /* Reset our CI */
yueee_yt 0:7766f6712673 116 static int lcp_cilen (fsm*); /* Return length of our CI */
yueee_yt 0:7766f6712673 117 static void lcp_addci (fsm*, u_char*, int*); /* Add our CI to pkt */
yueee_yt 0:7766f6712673 118 static int lcp_ackci (fsm*, u_char*, int); /* Peer ack'd our CI */
yueee_yt 0:7766f6712673 119 static int lcp_nakci (fsm*, u_char*, int); /* Peer nak'd our CI */
yueee_yt 0:7766f6712673 120 static int lcp_rejci (fsm*, u_char*, int); /* Peer rej'd our CI */
yueee_yt 0:7766f6712673 121 static int lcp_reqci (fsm*, u_char*, int*, int); /* Rcv peer CI */
yueee_yt 0:7766f6712673 122 static void lcp_up (fsm*); /* We're UP */
yueee_yt 0:7766f6712673 123 static void lcp_down (fsm*); /* We're DOWN */
yueee_yt 0:7766f6712673 124 static void lcp_starting (fsm*); /* We need lower layer up */
yueee_yt 0:7766f6712673 125 static void lcp_finished (fsm*); /* We need lower layer down */
yueee_yt 0:7766f6712673 126 static int lcp_extcode (fsm*, int, u_char, u_char*, int);
yueee_yt 0:7766f6712673 127 static void lcp_rprotrej (fsm*, u_char*, int);
yueee_yt 0:7766f6712673 128
yueee_yt 0:7766f6712673 129 /*
yueee_yt 0:7766f6712673 130 * routines to send LCP echos to peer
yueee_yt 0:7766f6712673 131 */
yueee_yt 0:7766f6712673 132
yueee_yt 0:7766f6712673 133 static void lcp_echo_lowerup (int);
yueee_yt 0:7766f6712673 134 static void lcp_echo_lowerdown (int);
yueee_yt 0:7766f6712673 135 static void LcpEchoTimeout (void*);
yueee_yt 0:7766f6712673 136 static void lcp_received_echo_reply (fsm*, int, u_char*, int);
yueee_yt 0:7766f6712673 137 static void LcpSendEchoRequest (fsm*);
yueee_yt 0:7766f6712673 138 static void LcpLinkFailure (fsm*);
yueee_yt 0:7766f6712673 139 static void LcpEchoCheck (fsm*);
yueee_yt 0:7766f6712673 140
yueee_yt 0:7766f6712673 141 static fsm_callbacks lcp_callbacks = { /* LCP callback routines */
yueee_yt 0:7766f6712673 142 lcp_resetci, /* Reset our Configuration Information */
yueee_yt 0:7766f6712673 143 lcp_cilen, /* Length of our Configuration Information */
yueee_yt 0:7766f6712673 144 lcp_addci, /* Add our Configuration Information */
yueee_yt 0:7766f6712673 145 lcp_ackci, /* ACK our Configuration Information */
yueee_yt 0:7766f6712673 146 lcp_nakci, /* NAK our Configuration Information */
yueee_yt 0:7766f6712673 147 lcp_rejci, /* Reject our Configuration Information */
yueee_yt 0:7766f6712673 148 lcp_reqci, /* Request peer's Configuration Information */
yueee_yt 0:7766f6712673 149 lcp_up, /* Called when fsm reaches LS_OPENED state */
yueee_yt 0:7766f6712673 150 lcp_down, /* Called when fsm leaves LS_OPENED state */
yueee_yt 0:7766f6712673 151 lcp_starting, /* Called when we want the lower layer up */
yueee_yt 0:7766f6712673 152 lcp_finished, /* Called when we want the lower layer down */
yueee_yt 0:7766f6712673 153 NULL, /* Called when Protocol-Reject received */
yueee_yt 0:7766f6712673 154 NULL, /* Retransmission is necessary */
yueee_yt 0:7766f6712673 155 lcp_extcode, /* Called to handle LCP-specific codes */
yueee_yt 0:7766f6712673 156 "LCP" /* String name of protocol */
yueee_yt 0:7766f6712673 157 };
yueee_yt 0:7766f6712673 158
yueee_yt 0:7766f6712673 159 /*
yueee_yt 0:7766f6712673 160 * Protocol entry points.
yueee_yt 0:7766f6712673 161 * Some of these are called directly.
yueee_yt 0:7766f6712673 162 */
yueee_yt 0:7766f6712673 163
yueee_yt 0:7766f6712673 164 static void lcp_input (int, u_char *, int);
yueee_yt 0:7766f6712673 165 static void lcp_protrej (int);
yueee_yt 0:7766f6712673 166
yueee_yt 0:7766f6712673 167 struct protent lcp_protent = {
yueee_yt 0:7766f6712673 168 PPP_LCP,
yueee_yt 0:7766f6712673 169 lcp_init,
yueee_yt 0:7766f6712673 170 lcp_input,
yueee_yt 0:7766f6712673 171 lcp_protrej,
yueee_yt 0:7766f6712673 172 lcp_lowerup,
yueee_yt 0:7766f6712673 173 lcp_lowerdown,
yueee_yt 0:7766f6712673 174 lcp_open,
yueee_yt 0:7766f6712673 175 lcp_close,
yueee_yt 0:7766f6712673 176 #if PPP_ADDITIONAL_CALLBACKS
yueee_yt 0:7766f6712673 177 lcp_printpkt,
yueee_yt 0:7766f6712673 178 NULL,
yueee_yt 0:7766f6712673 179 #endif /* PPP_ADDITIONAL_CALLBACKS */
yueee_yt 0:7766f6712673 180 1,
yueee_yt 0:7766f6712673 181 "LCP",
yueee_yt 0:7766f6712673 182 #if PPP_ADDITIONAL_CALLBACKS
yueee_yt 0:7766f6712673 183 NULL,
yueee_yt 0:7766f6712673 184 NULL,
yueee_yt 0:7766f6712673 185 NULL
yueee_yt 0:7766f6712673 186 #endif /* PPP_ADDITIONAL_CALLBACKS */
yueee_yt 0:7766f6712673 187 };
yueee_yt 0:7766f6712673 188
yueee_yt 0:7766f6712673 189 int lcp_loopbackfail = DEFLOOPBACKFAIL;
yueee_yt 0:7766f6712673 190
yueee_yt 0:7766f6712673 191 /*
yueee_yt 0:7766f6712673 192 * Length of each type of configuration option (in octets)
yueee_yt 0:7766f6712673 193 */
yueee_yt 0:7766f6712673 194 #define CILEN_VOID 2
yueee_yt 0:7766f6712673 195 #define CILEN_CHAR 3
yueee_yt 0:7766f6712673 196 #define CILEN_SHORT 4 /* CILEN_VOID + sizeof(short) */
yueee_yt 0:7766f6712673 197 #define CILEN_CHAP 5 /* CILEN_VOID + sizeof(short) + 1 */
yueee_yt 0:7766f6712673 198 #define CILEN_LONG 6 /* CILEN_VOID + sizeof(long) */
yueee_yt 0:7766f6712673 199 #define CILEN_LQR 8 /* CILEN_VOID + sizeof(short) + sizeof(long) */
yueee_yt 0:7766f6712673 200 #define CILEN_CBCP 3
yueee_yt 0:7766f6712673 201
yueee_yt 0:7766f6712673 202 #define CODENAME(x) ((x) == CONFACK ? "ACK" : (x) == CONFNAK ? "NAK" : "REJ")
yueee_yt 0:7766f6712673 203
yueee_yt 0:7766f6712673 204 #if 0 /* UNUSED */
yueee_yt 0:7766f6712673 205 /*
yueee_yt 0:7766f6712673 206 * setescape - add chars to the set we escape on transmission.
yueee_yt 0:7766f6712673 207 */
yueee_yt 0:7766f6712673 208 static int
yueee_yt 0:7766f6712673 209 setescape(argv)
yueee_yt 0:7766f6712673 210 char **argv;
yueee_yt 0:7766f6712673 211 {
yueee_yt 0:7766f6712673 212 int n, ret;
yueee_yt 0:7766f6712673 213 char *p, *endp;
yueee_yt 0:7766f6712673 214
yueee_yt 0:7766f6712673 215 p = *argv;
yueee_yt 0:7766f6712673 216 ret = 1;
yueee_yt 0:7766f6712673 217 while (*p) {
yueee_yt 0:7766f6712673 218 n = strtol(p, &endp, 16);
yueee_yt 0:7766f6712673 219 if (p == endp) {
yueee_yt 0:7766f6712673 220 option_error("escape parameter contains invalid hex number '%s'", p);
yueee_yt 0:7766f6712673 221 return 0;
yueee_yt 0:7766f6712673 222 }
yueee_yt 0:7766f6712673 223 p = endp;
yueee_yt 0:7766f6712673 224 if (n < 0 || n == 0x5E || n > 0xFF) {
yueee_yt 0:7766f6712673 225 option_error("can't escape character 0x%x", n);
yueee_yt 0:7766f6712673 226 ret = 0;
yueee_yt 0:7766f6712673 227 } else
yueee_yt 0:7766f6712673 228 xmit_accm[0][n >> 5] |= 1 << (n & 0x1F);
yueee_yt 0:7766f6712673 229 while (*p == ',' || *p == ' ')
yueee_yt 0:7766f6712673 230 ++p;
yueee_yt 0:7766f6712673 231 }
yueee_yt 0:7766f6712673 232 return ret;
yueee_yt 0:7766f6712673 233 }
yueee_yt 0:7766f6712673 234 #endif /* UNUSED */
yueee_yt 0:7766f6712673 235
yueee_yt 0:7766f6712673 236 /*
yueee_yt 0:7766f6712673 237 * lcp_init - Initialize LCP.
yueee_yt 0:7766f6712673 238 */
yueee_yt 0:7766f6712673 239 void
yueee_yt 0:7766f6712673 240 lcp_init(int unit)
yueee_yt 0:7766f6712673 241 {
yueee_yt 0:7766f6712673 242 fsm *f = &lcp_fsm[unit];
yueee_yt 0:7766f6712673 243 lcp_options *wo = &lcp_wantoptions[unit];
yueee_yt 0:7766f6712673 244 lcp_options *ao = &lcp_allowoptions[unit];
yueee_yt 0:7766f6712673 245
yueee_yt 0:7766f6712673 246 f->unit = unit;
yueee_yt 0:7766f6712673 247 f->protocol = PPP_LCP;
yueee_yt 0:7766f6712673 248 f->callbacks = &lcp_callbacks;
yueee_yt 0:7766f6712673 249
yueee_yt 0:7766f6712673 250 fsm_init(f);
yueee_yt 0:7766f6712673 251
yueee_yt 0:7766f6712673 252 wo->passive = 0;
yueee_yt 0:7766f6712673 253 wo->silent = 0;
yueee_yt 0:7766f6712673 254 wo->restart = 0; /* Set to 1 in kernels or multi-line implementations */
yueee_yt 0:7766f6712673 255 wo->neg_mru = 1;
yueee_yt 0:7766f6712673 256 wo->mru = PPP_DEFMRU;
yueee_yt 0:7766f6712673 257 wo->neg_asyncmap = 1;
yueee_yt 0:7766f6712673 258 wo->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
yueee_yt 0:7766f6712673 259 wo->neg_chap = 0; /* Set to 1 on server */
yueee_yt 0:7766f6712673 260 wo->neg_upap = 0; /* Set to 1 on server */
yueee_yt 0:7766f6712673 261 wo->chap_mdtype = CHAP_DIGEST_MD5;
yueee_yt 0:7766f6712673 262 wo->neg_magicnumber = 1;
yueee_yt 0:7766f6712673 263 wo->neg_pcompression = 1;
yueee_yt 0:7766f6712673 264 wo->neg_accompression = 1;
yueee_yt 0:7766f6712673 265 wo->neg_lqr = 0; /* no LQR implementation yet */
yueee_yt 0:7766f6712673 266 wo->neg_cbcp = 0;
yueee_yt 0:7766f6712673 267
yueee_yt 0:7766f6712673 268 ao->neg_mru = 1;
yueee_yt 0:7766f6712673 269 ao->mru = PPP_MAXMRU;
yueee_yt 0:7766f6712673 270 ao->neg_asyncmap = 1;
yueee_yt 0:7766f6712673 271 ao->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
yueee_yt 0:7766f6712673 272 ao->neg_chap = (CHAP_SUPPORT != 0);
yueee_yt 0:7766f6712673 273 ao->chap_mdtype = CHAP_DIGEST_MD5;
yueee_yt 0:7766f6712673 274 ao->neg_upap = (PAP_SUPPORT != 0);
yueee_yt 0:7766f6712673 275 ao->neg_magicnumber = 1;
yueee_yt 0:7766f6712673 276 ao->neg_pcompression = 1;
yueee_yt 0:7766f6712673 277 ao->neg_accompression = 1;
yueee_yt 0:7766f6712673 278 ao->neg_lqr = 0; /* no LQR implementation yet */
yueee_yt 0:7766f6712673 279 ao->neg_cbcp = (CBCP_SUPPORT != 0);
yueee_yt 0:7766f6712673 280
yueee_yt 0:7766f6712673 281 /*
yueee_yt 0:7766f6712673 282 * Set transmit escape for the flag and escape characters plus anything
yueee_yt 0:7766f6712673 283 * set for the allowable options.
yueee_yt 0:7766f6712673 284 */
yueee_yt 0:7766f6712673 285 memset(xmit_accm[unit], 0, sizeof(xmit_accm[0]));
yueee_yt 0:7766f6712673 286 xmit_accm[unit][15] = 0x60;
yueee_yt 0:7766f6712673 287 xmit_accm[unit][0] = (u_char)((ao->asyncmap & 0xFF));
yueee_yt 0:7766f6712673 288 xmit_accm[unit][1] = (u_char)((ao->asyncmap >> 8) & 0xFF);
yueee_yt 0:7766f6712673 289 xmit_accm[unit][2] = (u_char)((ao->asyncmap >> 16) & 0xFF);
yueee_yt 0:7766f6712673 290 xmit_accm[unit][3] = (u_char)((ao->asyncmap >> 24) & 0xFF);
yueee_yt 0:7766f6712673 291 LCPDEBUG(LOG_INFO, ("lcp_init: xmit_accm=%X %X %X %X\n",
yueee_yt 0:7766f6712673 292 xmit_accm[unit][0],
yueee_yt 0:7766f6712673 293 xmit_accm[unit][1],
yueee_yt 0:7766f6712673 294 xmit_accm[unit][2],
yueee_yt 0:7766f6712673 295 xmit_accm[unit][3]));
yueee_yt 0:7766f6712673 296
yueee_yt 0:7766f6712673 297 lcp_phase[unit] = PHASE_INITIALIZE;
yueee_yt 0:7766f6712673 298 }
yueee_yt 0:7766f6712673 299
yueee_yt 0:7766f6712673 300
yueee_yt 0:7766f6712673 301 /*
yueee_yt 0:7766f6712673 302 * lcp_open - LCP is allowed to come up.
yueee_yt 0:7766f6712673 303 */
yueee_yt 0:7766f6712673 304 void
yueee_yt 0:7766f6712673 305 lcp_open(int unit)
yueee_yt 0:7766f6712673 306 {
yueee_yt 0:7766f6712673 307 fsm *f = &lcp_fsm[unit];
yueee_yt 0:7766f6712673 308 lcp_options *wo = &lcp_wantoptions[unit];
yueee_yt 0:7766f6712673 309
yueee_yt 0:7766f6712673 310 f->flags = 0;
yueee_yt 0:7766f6712673 311 if (wo->passive) {
yueee_yt 0:7766f6712673 312 f->flags |= OPT_PASSIVE;
yueee_yt 0:7766f6712673 313 }
yueee_yt 0:7766f6712673 314 if (wo->silent) {
yueee_yt 0:7766f6712673 315 f->flags |= OPT_SILENT;
yueee_yt 0:7766f6712673 316 }
yueee_yt 0:7766f6712673 317 fsm_open(f);
yueee_yt 0:7766f6712673 318
yueee_yt 0:7766f6712673 319 lcp_phase[unit] = PHASE_ESTABLISH;
yueee_yt 0:7766f6712673 320 }
yueee_yt 0:7766f6712673 321
yueee_yt 0:7766f6712673 322
yueee_yt 0:7766f6712673 323 /*
yueee_yt 0:7766f6712673 324 * lcp_close - Take LCP down.
yueee_yt 0:7766f6712673 325 */
yueee_yt 0:7766f6712673 326 void
yueee_yt 0:7766f6712673 327 lcp_close(int unit, char *reason)
yueee_yt 0:7766f6712673 328 {
yueee_yt 0:7766f6712673 329 fsm *f = &lcp_fsm[unit];
yueee_yt 0:7766f6712673 330
yueee_yt 0:7766f6712673 331 if (lcp_phase[unit] != PHASE_DEAD) {
yueee_yt 0:7766f6712673 332 lcp_phase[unit] = PHASE_TERMINATE;
yueee_yt 0:7766f6712673 333 }
yueee_yt 0:7766f6712673 334 if (f->state == LS_STOPPED && f->flags & (OPT_PASSIVE|OPT_SILENT)) {
yueee_yt 0:7766f6712673 335 /*
yueee_yt 0:7766f6712673 336 * This action is not strictly according to the FSM in RFC1548,
yueee_yt 0:7766f6712673 337 * but it does mean that the program terminates if you do an
yueee_yt 0:7766f6712673 338 * lcp_close() in passive/silent mode when a connection hasn't
yueee_yt 0:7766f6712673 339 * been established.
yueee_yt 0:7766f6712673 340 */
yueee_yt 0:7766f6712673 341 f->state = LS_CLOSED;
yueee_yt 0:7766f6712673 342 lcp_finished(f);
yueee_yt 0:7766f6712673 343 } else {
yueee_yt 0:7766f6712673 344 fsm_close(f, reason);
yueee_yt 0:7766f6712673 345 }
yueee_yt 0:7766f6712673 346 }
yueee_yt 0:7766f6712673 347
yueee_yt 0:7766f6712673 348
yueee_yt 0:7766f6712673 349 /*
yueee_yt 0:7766f6712673 350 * lcp_lowerup - The lower layer is up.
yueee_yt 0:7766f6712673 351 */
yueee_yt 0:7766f6712673 352 void
yueee_yt 0:7766f6712673 353 lcp_lowerup(int unit)
yueee_yt 0:7766f6712673 354 {
yueee_yt 0:7766f6712673 355 lcp_options *wo = &lcp_wantoptions[unit];
yueee_yt 0:7766f6712673 356
yueee_yt 0:7766f6712673 357 /*
yueee_yt 0:7766f6712673 358 * Don't use A/C or protocol compression on transmission,
yueee_yt 0:7766f6712673 359 * but accept A/C and protocol compressed packets
yueee_yt 0:7766f6712673 360 * if we are going to ask for A/C and protocol compression.
yueee_yt 0:7766f6712673 361 */
yueee_yt 0:7766f6712673 362 ppp_set_xaccm(unit, &xmit_accm[unit]);
yueee_yt 0:7766f6712673 363 ppp_send_config(unit, PPP_MRU, 0xffffffffl, 0, 0);
yueee_yt 0:7766f6712673 364 ppp_recv_config(unit, PPP_MRU, 0x00000000l,
yueee_yt 0:7766f6712673 365 wo->neg_pcompression, wo->neg_accompression);
yueee_yt 0:7766f6712673 366 peer_mru[unit] = PPP_MRU;
yueee_yt 0:7766f6712673 367 lcp_allowoptions[unit].asyncmap = (u_long)xmit_accm[unit][0]
yueee_yt 0:7766f6712673 368 | ((u_long)xmit_accm[unit][1] << 8)
yueee_yt 0:7766f6712673 369 | ((u_long)xmit_accm[unit][2] << 16)
yueee_yt 0:7766f6712673 370 | ((u_long)xmit_accm[unit][3] << 24);
yueee_yt 0:7766f6712673 371 LCPDEBUG(LOG_INFO, ("lcp_lowerup: asyncmap=%X %X %X %X\n",
yueee_yt 0:7766f6712673 372 xmit_accm[unit][3],
yueee_yt 0:7766f6712673 373 xmit_accm[unit][2],
yueee_yt 0:7766f6712673 374 xmit_accm[unit][1],
yueee_yt 0:7766f6712673 375 xmit_accm[unit][0]));
yueee_yt 0:7766f6712673 376
yueee_yt 0:7766f6712673 377 fsm_lowerup(&lcp_fsm[unit]);
yueee_yt 0:7766f6712673 378 }
yueee_yt 0:7766f6712673 379
yueee_yt 0:7766f6712673 380
yueee_yt 0:7766f6712673 381 /*
yueee_yt 0:7766f6712673 382 * lcp_lowerdown - The lower layer is down.
yueee_yt 0:7766f6712673 383 */
yueee_yt 0:7766f6712673 384 void
yueee_yt 0:7766f6712673 385 lcp_lowerdown(int unit)
yueee_yt 0:7766f6712673 386 {
yueee_yt 0:7766f6712673 387 fsm_lowerdown(&lcp_fsm[unit]);
yueee_yt 0:7766f6712673 388 }
yueee_yt 0:7766f6712673 389
yueee_yt 0:7766f6712673 390
yueee_yt 0:7766f6712673 391 /*
yueee_yt 0:7766f6712673 392 * lcp_input - Input LCP packet.
yueee_yt 0:7766f6712673 393 */
yueee_yt 0:7766f6712673 394 static void
yueee_yt 0:7766f6712673 395 lcp_input(int unit, u_char *p, int len)
yueee_yt 0:7766f6712673 396 {
yueee_yt 0:7766f6712673 397 fsm *f = &lcp_fsm[unit];
yueee_yt 0:7766f6712673 398
yueee_yt 0:7766f6712673 399 fsm_input(f, p, len);
yueee_yt 0:7766f6712673 400 }
yueee_yt 0:7766f6712673 401
yueee_yt 0:7766f6712673 402
yueee_yt 0:7766f6712673 403 /*
yueee_yt 0:7766f6712673 404 * lcp_extcode - Handle a LCP-specific code.
yueee_yt 0:7766f6712673 405 */
yueee_yt 0:7766f6712673 406 static int
yueee_yt 0:7766f6712673 407 lcp_extcode(fsm *f, int code, u_char id, u_char *inp, int len)
yueee_yt 0:7766f6712673 408 {
yueee_yt 0:7766f6712673 409 u_char *magp;
yueee_yt 0:7766f6712673 410
yueee_yt 0:7766f6712673 411 switch( code ){
yueee_yt 0:7766f6712673 412 case PROTREJ:
yueee_yt 0:7766f6712673 413 lcp_rprotrej(f, inp, len);
yueee_yt 0:7766f6712673 414 break;
yueee_yt 0:7766f6712673 415
yueee_yt 0:7766f6712673 416 case ECHOREQ:
yueee_yt 0:7766f6712673 417 if (f->state != LS_OPENED) {
yueee_yt 0:7766f6712673 418 break;
yueee_yt 0:7766f6712673 419 }
yueee_yt 0:7766f6712673 420 LCPDEBUG(LOG_INFO, ("lcp: Echo-Request, Rcvd id %d\n", id));
yueee_yt 0:7766f6712673 421 magp = inp;
yueee_yt 0:7766f6712673 422 PUTLONG(lcp_gotoptions[f->unit].magicnumber, magp);
yueee_yt 0:7766f6712673 423 fsm_sdata(f, ECHOREP, id, inp, len);
yueee_yt 0:7766f6712673 424 break;
yueee_yt 0:7766f6712673 425
yueee_yt 0:7766f6712673 426 case ECHOREP:
yueee_yt 0:7766f6712673 427 lcp_received_echo_reply(f, id, inp, len);
yueee_yt 0:7766f6712673 428 break;
yueee_yt 0:7766f6712673 429
yueee_yt 0:7766f6712673 430 case DISCREQ:
yueee_yt 0:7766f6712673 431 break;
yueee_yt 0:7766f6712673 432
yueee_yt 0:7766f6712673 433 default:
yueee_yt 0:7766f6712673 434 return 0;
yueee_yt 0:7766f6712673 435 }
yueee_yt 0:7766f6712673 436 return 1;
yueee_yt 0:7766f6712673 437 }
yueee_yt 0:7766f6712673 438
yueee_yt 0:7766f6712673 439
yueee_yt 0:7766f6712673 440 /*
yueee_yt 0:7766f6712673 441 * lcp_rprotrej - Receive an Protocol-Reject.
yueee_yt 0:7766f6712673 442 *
yueee_yt 0:7766f6712673 443 * Figure out which protocol is rejected and inform it.
yueee_yt 0:7766f6712673 444 */
yueee_yt 0:7766f6712673 445 static void
yueee_yt 0:7766f6712673 446 lcp_rprotrej(fsm *f, u_char *inp, int len)
yueee_yt 0:7766f6712673 447 {
yueee_yt 0:7766f6712673 448 int i;
yueee_yt 0:7766f6712673 449 struct protent *protp;
yueee_yt 0:7766f6712673 450 u_short prot;
yueee_yt 0:7766f6712673 451
yueee_yt 0:7766f6712673 452 if (len < (int)sizeof (u_short)) {
yueee_yt 0:7766f6712673 453 LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd short Protocol-Reject packet!\n"));
yueee_yt 0:7766f6712673 454 return;
yueee_yt 0:7766f6712673 455 }
yueee_yt 0:7766f6712673 456
yueee_yt 0:7766f6712673 457 GETSHORT(prot, inp);
yueee_yt 0:7766f6712673 458
yueee_yt 0:7766f6712673 459 LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd Protocol-Reject packet for %x!\n", prot));
yueee_yt 0:7766f6712673 460
yueee_yt 0:7766f6712673 461 /*
yueee_yt 0:7766f6712673 462 * Protocol-Reject packets received in any state other than the LCP
yueee_yt 0:7766f6712673 463 * LS_OPENED state SHOULD be silently discarded.
yueee_yt 0:7766f6712673 464 */
yueee_yt 0:7766f6712673 465 if( f->state != LS_OPENED ) {
yueee_yt 0:7766f6712673 466 LCPDEBUG(LOG_INFO, ("Protocol-Reject discarded: LCP in state %d\n", f->state));
yueee_yt 0:7766f6712673 467 return;
yueee_yt 0:7766f6712673 468 }
yueee_yt 0:7766f6712673 469
yueee_yt 0:7766f6712673 470 /*
yueee_yt 0:7766f6712673 471 * Upcall the proper Protocol-Reject routine.
yueee_yt 0:7766f6712673 472 */
yueee_yt 0:7766f6712673 473 for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
yueee_yt 0:7766f6712673 474 if (protp->protocol == prot && protp->enabled_flag) {
yueee_yt 0:7766f6712673 475 (*protp->protrej)(f->unit);
yueee_yt 0:7766f6712673 476 return;
yueee_yt 0:7766f6712673 477 }
yueee_yt 0:7766f6712673 478 }
yueee_yt 0:7766f6712673 479
yueee_yt 0:7766f6712673 480 LCPDEBUG(LOG_WARNING, ("Protocol-Reject for unsupported protocol 0x%x\n", prot));
yueee_yt 0:7766f6712673 481 }
yueee_yt 0:7766f6712673 482
yueee_yt 0:7766f6712673 483
yueee_yt 0:7766f6712673 484 /*
yueee_yt 0:7766f6712673 485 * lcp_protrej - A Protocol-Reject was received.
yueee_yt 0:7766f6712673 486 */
yueee_yt 0:7766f6712673 487 static void
yueee_yt 0:7766f6712673 488 lcp_protrej(int unit)
yueee_yt 0:7766f6712673 489 {
yueee_yt 0:7766f6712673 490 LWIP_UNUSED_ARG(unit);
yueee_yt 0:7766f6712673 491 /*
yueee_yt 0:7766f6712673 492 * Can't reject LCP!
yueee_yt 0:7766f6712673 493 */
yueee_yt 0:7766f6712673 494 LCPDEBUG(LOG_WARNING, ("lcp_protrej: Received Protocol-Reject for LCP!\n"));
yueee_yt 0:7766f6712673 495 fsm_protreject(&lcp_fsm[unit]);
yueee_yt 0:7766f6712673 496 }
yueee_yt 0:7766f6712673 497
yueee_yt 0:7766f6712673 498
yueee_yt 0:7766f6712673 499 /*
yueee_yt 0:7766f6712673 500 * lcp_sprotrej - Send a Protocol-Reject for some protocol.
yueee_yt 0:7766f6712673 501 */
yueee_yt 0:7766f6712673 502 void
yueee_yt 0:7766f6712673 503 lcp_sprotrej(int unit, u_char *p, int len)
yueee_yt 0:7766f6712673 504 {
yueee_yt 0:7766f6712673 505 /*
yueee_yt 0:7766f6712673 506 * Send back the protocol and the information field of the
yueee_yt 0:7766f6712673 507 * rejected packet. We only get here if LCP is in the LS_OPENED state.
yueee_yt 0:7766f6712673 508 */
yueee_yt 0:7766f6712673 509
yueee_yt 0:7766f6712673 510 fsm_sdata(&lcp_fsm[unit], PROTREJ, ++lcp_fsm[unit].id, p, len);
yueee_yt 0:7766f6712673 511 }
yueee_yt 0:7766f6712673 512
yueee_yt 0:7766f6712673 513
yueee_yt 0:7766f6712673 514 /*
yueee_yt 0:7766f6712673 515 * lcp_resetci - Reset our CI.
yueee_yt 0:7766f6712673 516 */
yueee_yt 0:7766f6712673 517 static void
yueee_yt 0:7766f6712673 518 lcp_resetci(fsm *f)
yueee_yt 0:7766f6712673 519 {
yueee_yt 0:7766f6712673 520 lcp_wantoptions[f->unit].magicnumber = magic();
yueee_yt 0:7766f6712673 521 lcp_wantoptions[f->unit].numloops = 0;
yueee_yt 0:7766f6712673 522 lcp_gotoptions[f->unit] = lcp_wantoptions[f->unit];
yueee_yt 0:7766f6712673 523 peer_mru[f->unit] = PPP_MRU;
yueee_yt 0:7766f6712673 524 auth_reset(f->unit);
yueee_yt 0:7766f6712673 525 }
yueee_yt 0:7766f6712673 526
yueee_yt 0:7766f6712673 527
yueee_yt 0:7766f6712673 528 /*
yueee_yt 0:7766f6712673 529 * lcp_cilen - Return length of our CI.
yueee_yt 0:7766f6712673 530 */
yueee_yt 0:7766f6712673 531 static int
yueee_yt 0:7766f6712673 532 lcp_cilen(fsm *f)
yueee_yt 0:7766f6712673 533 {
yueee_yt 0:7766f6712673 534 lcp_options *go = &lcp_gotoptions[f->unit];
yueee_yt 0:7766f6712673 535
yueee_yt 0:7766f6712673 536 #define LENCIVOID(neg) ((neg) ? CILEN_VOID : 0)
yueee_yt 0:7766f6712673 537 #define LENCICHAP(neg) ((neg) ? CILEN_CHAP : 0)
yueee_yt 0:7766f6712673 538 #define LENCISHORT(neg) ((neg) ? CILEN_SHORT : 0)
yueee_yt 0:7766f6712673 539 #define LENCILONG(neg) ((neg) ? CILEN_LONG : 0)
yueee_yt 0:7766f6712673 540 #define LENCILQR(neg) ((neg) ? CILEN_LQR: 0)
yueee_yt 0:7766f6712673 541 #define LENCICBCP(neg) ((neg) ? CILEN_CBCP: 0)
yueee_yt 0:7766f6712673 542 /*
yueee_yt 0:7766f6712673 543 * NB: we only ask for one of CHAP and UPAP, even if we will
yueee_yt 0:7766f6712673 544 * accept either.
yueee_yt 0:7766f6712673 545 */
yueee_yt 0:7766f6712673 546 return (LENCISHORT(go->neg_mru && go->mru != PPP_DEFMRU) +
yueee_yt 0:7766f6712673 547 LENCILONG(go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) +
yueee_yt 0:7766f6712673 548 LENCICHAP(go->neg_chap) +
yueee_yt 0:7766f6712673 549 LENCISHORT(!go->neg_chap && go->neg_upap) +
yueee_yt 0:7766f6712673 550 LENCILQR(go->neg_lqr) +
yueee_yt 0:7766f6712673 551 LENCICBCP(go->neg_cbcp) +
yueee_yt 0:7766f6712673 552 LENCILONG(go->neg_magicnumber) +
yueee_yt 0:7766f6712673 553 LENCIVOID(go->neg_pcompression) +
yueee_yt 0:7766f6712673 554 LENCIVOID(go->neg_accompression));
yueee_yt 0:7766f6712673 555 }
yueee_yt 0:7766f6712673 556
yueee_yt 0:7766f6712673 557
yueee_yt 0:7766f6712673 558 /*
yueee_yt 0:7766f6712673 559 * lcp_addci - Add our desired CIs to a packet.
yueee_yt 0:7766f6712673 560 */
yueee_yt 0:7766f6712673 561 static void
yueee_yt 0:7766f6712673 562 lcp_addci(fsm *f, u_char *ucp, int *lenp)
yueee_yt 0:7766f6712673 563 {
yueee_yt 0:7766f6712673 564 lcp_options *go = &lcp_gotoptions[f->unit];
yueee_yt 0:7766f6712673 565 u_char *start_ucp = ucp;
yueee_yt 0:7766f6712673 566
yueee_yt 0:7766f6712673 567 #define ADDCIVOID(opt, neg) \
yueee_yt 0:7766f6712673 568 if (neg) { \
yueee_yt 0:7766f6712673 569 LCPDEBUG(LOG_INFO, ("lcp_addci: opt=%d\n", opt)); \
yueee_yt 0:7766f6712673 570 PUTCHAR(opt, ucp); \
yueee_yt 0:7766f6712673 571 PUTCHAR(CILEN_VOID, ucp); \
yueee_yt 0:7766f6712673 572 }
yueee_yt 0:7766f6712673 573 #define ADDCISHORT(opt, neg, val) \
yueee_yt 0:7766f6712673 574 if (neg) { \
yueee_yt 0:7766f6712673 575 LCPDEBUG(LOG_INFO, ("lcp_addci: INT opt=%d %X\n", opt, val)); \
yueee_yt 0:7766f6712673 576 PUTCHAR(opt, ucp); \
yueee_yt 0:7766f6712673 577 PUTCHAR(CILEN_SHORT, ucp); \
yueee_yt 0:7766f6712673 578 PUTSHORT(val, ucp); \
yueee_yt 0:7766f6712673 579 }
yueee_yt 0:7766f6712673 580 #define ADDCICHAP(opt, neg, val, digest) \
yueee_yt 0:7766f6712673 581 if (neg) { \
yueee_yt 0:7766f6712673 582 LCPDEBUG(LOG_INFO, ("lcp_addci: CHAP opt=%d %X\n", opt, val)); \
yueee_yt 0:7766f6712673 583 PUTCHAR(opt, ucp); \
yueee_yt 0:7766f6712673 584 PUTCHAR(CILEN_CHAP, ucp); \
yueee_yt 0:7766f6712673 585 PUTSHORT(val, ucp); \
yueee_yt 0:7766f6712673 586 PUTCHAR(digest, ucp); \
yueee_yt 0:7766f6712673 587 }
yueee_yt 0:7766f6712673 588 #define ADDCILONG(opt, neg, val) \
yueee_yt 0:7766f6712673 589 if (neg) { \
yueee_yt 0:7766f6712673 590 LCPDEBUG(LOG_INFO, ("lcp_addci: L opt=%d %lX\n", opt, val)); \
yueee_yt 0:7766f6712673 591 PUTCHAR(opt, ucp); \
yueee_yt 0:7766f6712673 592 PUTCHAR(CILEN_LONG, ucp); \
yueee_yt 0:7766f6712673 593 PUTLONG(val, ucp); \
yueee_yt 0:7766f6712673 594 }
yueee_yt 0:7766f6712673 595 #define ADDCILQR(opt, neg, val) \
yueee_yt 0:7766f6712673 596 if (neg) { \
yueee_yt 0:7766f6712673 597 LCPDEBUG(LOG_INFO, ("lcp_addci: LQR opt=%d %lX\n", opt, val)); \
yueee_yt 0:7766f6712673 598 PUTCHAR(opt, ucp); \
yueee_yt 0:7766f6712673 599 PUTCHAR(CILEN_LQR, ucp); \
yueee_yt 0:7766f6712673 600 PUTSHORT(PPP_LQR, ucp); \
yueee_yt 0:7766f6712673 601 PUTLONG(val, ucp); \
yueee_yt 0:7766f6712673 602 }
yueee_yt 0:7766f6712673 603 #define ADDCICHAR(opt, neg, val) \
yueee_yt 0:7766f6712673 604 if (neg) { \
yueee_yt 0:7766f6712673 605 LCPDEBUG(LOG_INFO, ("lcp_addci: CHAR opt=%d %X '%z'\n", opt, val, val)); \
yueee_yt 0:7766f6712673 606 PUTCHAR(opt, ucp); \
yueee_yt 0:7766f6712673 607 PUTCHAR(CILEN_CHAR, ucp); \
yueee_yt 0:7766f6712673 608 PUTCHAR(val, ucp); \
yueee_yt 0:7766f6712673 609 }
yueee_yt 0:7766f6712673 610
yueee_yt 0:7766f6712673 611 ADDCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
yueee_yt 0:7766f6712673 612 ADDCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
yueee_yt 0:7766f6712673 613 ADDCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
yueee_yt 0:7766f6712673 614 ADDCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
yueee_yt 0:7766f6712673 615 ADDCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
yueee_yt 0:7766f6712673 616 ADDCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
yueee_yt 0:7766f6712673 617 ADDCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
yueee_yt 0:7766f6712673 618 ADDCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
yueee_yt 0:7766f6712673 619 ADDCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
yueee_yt 0:7766f6712673 620
yueee_yt 0:7766f6712673 621 if (ucp - start_ucp != *lenp) {
yueee_yt 0:7766f6712673 622 /* this should never happen, because peer_mtu should be 1500 */
yueee_yt 0:7766f6712673 623 LCPDEBUG(LOG_ERR, ("Bug in lcp_addci: wrong length\n"));
yueee_yt 0:7766f6712673 624 }
yueee_yt 0:7766f6712673 625 }
yueee_yt 0:7766f6712673 626
yueee_yt 0:7766f6712673 627
yueee_yt 0:7766f6712673 628 /*
yueee_yt 0:7766f6712673 629 * lcp_ackci - Ack our CIs.
yueee_yt 0:7766f6712673 630 * This should not modify any state if the Ack is bad.
yueee_yt 0:7766f6712673 631 *
yueee_yt 0:7766f6712673 632 * Returns:
yueee_yt 0:7766f6712673 633 * 0 - Ack was bad.
yueee_yt 0:7766f6712673 634 * 1 - Ack was good.
yueee_yt 0:7766f6712673 635 */
yueee_yt 0:7766f6712673 636 static int
yueee_yt 0:7766f6712673 637 lcp_ackci(fsm *f, u_char *p, int len)
yueee_yt 0:7766f6712673 638 {
yueee_yt 0:7766f6712673 639 lcp_options *go = &lcp_gotoptions[f->unit];
yueee_yt 0:7766f6712673 640 u_char cilen, citype, cichar;
yueee_yt 0:7766f6712673 641 u_short cishort;
yueee_yt 0:7766f6712673 642 u32_t cilong;
yueee_yt 0:7766f6712673 643
yueee_yt 0:7766f6712673 644 /*
yueee_yt 0:7766f6712673 645 * CIs must be in exactly the same order that we sent.
yueee_yt 0:7766f6712673 646 * Check packet length and CI length at each step.
yueee_yt 0:7766f6712673 647 * If we find any deviations, then this packet is bad.
yueee_yt 0:7766f6712673 648 */
yueee_yt 0:7766f6712673 649 #define ACKCIVOID(opt, neg) \
yueee_yt 0:7766f6712673 650 if (neg) { \
yueee_yt 0:7766f6712673 651 if ((len -= CILEN_VOID) < 0) \
yueee_yt 0:7766f6712673 652 goto bad; \
yueee_yt 0:7766f6712673 653 GETCHAR(citype, p); \
yueee_yt 0:7766f6712673 654 GETCHAR(cilen, p); \
yueee_yt 0:7766f6712673 655 if (cilen != CILEN_VOID || citype != opt) \
yueee_yt 0:7766f6712673 656 goto bad; \
yueee_yt 0:7766f6712673 657 }
yueee_yt 0:7766f6712673 658 #define ACKCISHORT(opt, neg, val) \
yueee_yt 0:7766f6712673 659 if (neg) { \
yueee_yt 0:7766f6712673 660 if ((len -= CILEN_SHORT) < 0) \
yueee_yt 0:7766f6712673 661 goto bad; \
yueee_yt 0:7766f6712673 662 GETCHAR(citype, p); \
yueee_yt 0:7766f6712673 663 GETCHAR(cilen, p); \
yueee_yt 0:7766f6712673 664 if (cilen != CILEN_SHORT || citype != opt) \
yueee_yt 0:7766f6712673 665 goto bad; \
yueee_yt 0:7766f6712673 666 GETSHORT(cishort, p); \
yueee_yt 0:7766f6712673 667 if (cishort != val) \
yueee_yt 0:7766f6712673 668 goto bad; \
yueee_yt 0:7766f6712673 669 }
yueee_yt 0:7766f6712673 670 #define ACKCICHAR(opt, neg, val) \
yueee_yt 0:7766f6712673 671 if (neg) { \
yueee_yt 0:7766f6712673 672 if ((len -= CILEN_CHAR) < 0) \
yueee_yt 0:7766f6712673 673 goto bad; \
yueee_yt 0:7766f6712673 674 GETCHAR(citype, p); \
yueee_yt 0:7766f6712673 675 GETCHAR(cilen, p); \
yueee_yt 0:7766f6712673 676 if (cilen != CILEN_CHAR || citype != opt) \
yueee_yt 0:7766f6712673 677 goto bad; \
yueee_yt 0:7766f6712673 678 GETCHAR(cichar, p); \
yueee_yt 0:7766f6712673 679 if (cichar != val) \
yueee_yt 0:7766f6712673 680 goto bad; \
yueee_yt 0:7766f6712673 681 }
yueee_yt 0:7766f6712673 682 #define ACKCICHAP(opt, neg, val, digest) \
yueee_yt 0:7766f6712673 683 if (neg) { \
yueee_yt 0:7766f6712673 684 if ((len -= CILEN_CHAP) < 0) \
yueee_yt 0:7766f6712673 685 goto bad; \
yueee_yt 0:7766f6712673 686 GETCHAR(citype, p); \
yueee_yt 0:7766f6712673 687 GETCHAR(cilen, p); \
yueee_yt 0:7766f6712673 688 if (cilen != CILEN_CHAP || citype != opt) \
yueee_yt 0:7766f6712673 689 goto bad; \
yueee_yt 0:7766f6712673 690 GETSHORT(cishort, p); \
yueee_yt 0:7766f6712673 691 if (cishort != val) \
yueee_yt 0:7766f6712673 692 goto bad; \
yueee_yt 0:7766f6712673 693 GETCHAR(cichar, p); \
yueee_yt 0:7766f6712673 694 if (cichar != digest) \
yueee_yt 0:7766f6712673 695 goto bad; \
yueee_yt 0:7766f6712673 696 }
yueee_yt 0:7766f6712673 697 #define ACKCILONG(opt, neg, val) \
yueee_yt 0:7766f6712673 698 if (neg) { \
yueee_yt 0:7766f6712673 699 if ((len -= CILEN_LONG) < 0) \
yueee_yt 0:7766f6712673 700 goto bad; \
yueee_yt 0:7766f6712673 701 GETCHAR(citype, p); \
yueee_yt 0:7766f6712673 702 GETCHAR(cilen, p); \
yueee_yt 0:7766f6712673 703 if (cilen != CILEN_LONG || citype != opt) \
yueee_yt 0:7766f6712673 704 goto bad; \
yueee_yt 0:7766f6712673 705 GETLONG(cilong, p); \
yueee_yt 0:7766f6712673 706 if (cilong != val) \
yueee_yt 0:7766f6712673 707 goto bad; \
yueee_yt 0:7766f6712673 708 }
yueee_yt 0:7766f6712673 709 #define ACKCILQR(opt, neg, val) \
yueee_yt 0:7766f6712673 710 if (neg) { \
yueee_yt 0:7766f6712673 711 if ((len -= CILEN_LQR) < 0) \
yueee_yt 0:7766f6712673 712 goto bad; \
yueee_yt 0:7766f6712673 713 GETCHAR(citype, p); \
yueee_yt 0:7766f6712673 714 GETCHAR(cilen, p); \
yueee_yt 0:7766f6712673 715 if (cilen != CILEN_LQR || citype != opt) \
yueee_yt 0:7766f6712673 716 goto bad; \
yueee_yt 0:7766f6712673 717 GETSHORT(cishort, p); \
yueee_yt 0:7766f6712673 718 if (cishort != PPP_LQR) \
yueee_yt 0:7766f6712673 719 goto bad; \
yueee_yt 0:7766f6712673 720 GETLONG(cilong, p); \
yueee_yt 0:7766f6712673 721 if (cilong != val) \
yueee_yt 0:7766f6712673 722 goto bad; \
yueee_yt 0:7766f6712673 723 }
yueee_yt 0:7766f6712673 724
yueee_yt 0:7766f6712673 725 ACKCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
yueee_yt 0:7766f6712673 726 ACKCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
yueee_yt 0:7766f6712673 727 ACKCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
yueee_yt 0:7766f6712673 728 ACKCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
yueee_yt 0:7766f6712673 729 ACKCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
yueee_yt 0:7766f6712673 730 ACKCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
yueee_yt 0:7766f6712673 731 ACKCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
yueee_yt 0:7766f6712673 732 ACKCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
yueee_yt 0:7766f6712673 733 ACKCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
yueee_yt 0:7766f6712673 734
yueee_yt 0:7766f6712673 735 /*
yueee_yt 0:7766f6712673 736 * If there are any remaining CIs, then this packet is bad.
yueee_yt 0:7766f6712673 737 */
yueee_yt 0:7766f6712673 738 if (len != 0) {
yueee_yt 0:7766f6712673 739 goto bad;
yueee_yt 0:7766f6712673 740 }
yueee_yt 0:7766f6712673 741 LCPDEBUG(LOG_INFO, ("lcp_acki: Ack\n"));
yueee_yt 0:7766f6712673 742 return (1);
yueee_yt 0:7766f6712673 743 bad:
yueee_yt 0:7766f6712673 744 LCPDEBUG(LOG_WARNING, ("lcp_acki: received bad Ack!\n"));
yueee_yt 0:7766f6712673 745 return (0);
yueee_yt 0:7766f6712673 746 }
yueee_yt 0:7766f6712673 747
yueee_yt 0:7766f6712673 748
yueee_yt 0:7766f6712673 749 /*
yueee_yt 0:7766f6712673 750 * lcp_nakci - Peer has sent a NAK for some of our CIs.
yueee_yt 0:7766f6712673 751 * This should not modify any state if the Nak is bad
yueee_yt 0:7766f6712673 752 * or if LCP is in the LS_OPENED state.
yueee_yt 0:7766f6712673 753 *
yueee_yt 0:7766f6712673 754 * Returns:
yueee_yt 0:7766f6712673 755 * 0 - Nak was bad.
yueee_yt 0:7766f6712673 756 * 1 - Nak was good.
yueee_yt 0:7766f6712673 757 */
yueee_yt 0:7766f6712673 758 static int
yueee_yt 0:7766f6712673 759 lcp_nakci(fsm *f, u_char *p, int len)
yueee_yt 0:7766f6712673 760 {
yueee_yt 0:7766f6712673 761 lcp_options *go = &lcp_gotoptions[f->unit];
yueee_yt 0:7766f6712673 762 lcp_options *wo = &lcp_wantoptions[f->unit];
yueee_yt 0:7766f6712673 763 u_char citype, cichar, *next;
yueee_yt 0:7766f6712673 764 u_short cishort;
yueee_yt 0:7766f6712673 765 u32_t cilong;
yueee_yt 0:7766f6712673 766 lcp_options no; /* options we've seen Naks for */
yueee_yt 0:7766f6712673 767 lcp_options try; /* options to request next time */
yueee_yt 0:7766f6712673 768 int looped_back = 0;
yueee_yt 0:7766f6712673 769 int cilen;
yueee_yt 0:7766f6712673 770
yueee_yt 0:7766f6712673 771 BZERO(&no, sizeof(no));
yueee_yt 0:7766f6712673 772 try = *go;
yueee_yt 0:7766f6712673 773
yueee_yt 0:7766f6712673 774 /*
yueee_yt 0:7766f6712673 775 * Any Nak'd CIs must be in exactly the same order that we sent.
yueee_yt 0:7766f6712673 776 * Check packet length and CI length at each step.
yueee_yt 0:7766f6712673 777 * If we find any deviations, then this packet is bad.
yueee_yt 0:7766f6712673 778 */
yueee_yt 0:7766f6712673 779 #define NAKCIVOID(opt, neg, code) \
yueee_yt 0:7766f6712673 780 if (go->neg && \
yueee_yt 0:7766f6712673 781 len >= CILEN_VOID && \
yueee_yt 0:7766f6712673 782 p[1] == CILEN_VOID && \
yueee_yt 0:7766f6712673 783 p[0] == opt) { \
yueee_yt 0:7766f6712673 784 len -= CILEN_VOID; \
yueee_yt 0:7766f6712673 785 INCPTR(CILEN_VOID, p); \
yueee_yt 0:7766f6712673 786 no.neg = 1; \
yueee_yt 0:7766f6712673 787 code \
yueee_yt 0:7766f6712673 788 }
yueee_yt 0:7766f6712673 789 #define NAKCICHAP(opt, neg, code) \
yueee_yt 0:7766f6712673 790 if (go->neg && \
yueee_yt 0:7766f6712673 791 len >= CILEN_CHAP && \
yueee_yt 0:7766f6712673 792 p[1] == CILEN_CHAP && \
yueee_yt 0:7766f6712673 793 p[0] == opt) { \
yueee_yt 0:7766f6712673 794 len -= CILEN_CHAP; \
yueee_yt 0:7766f6712673 795 INCPTR(2, p); \
yueee_yt 0:7766f6712673 796 GETSHORT(cishort, p); \
yueee_yt 0:7766f6712673 797 GETCHAR(cichar, p); \
yueee_yt 0:7766f6712673 798 no.neg = 1; \
yueee_yt 0:7766f6712673 799 code \
yueee_yt 0:7766f6712673 800 }
yueee_yt 0:7766f6712673 801 #define NAKCICHAR(opt, neg, code) \
yueee_yt 0:7766f6712673 802 if (go->neg && \
yueee_yt 0:7766f6712673 803 len >= CILEN_CHAR && \
yueee_yt 0:7766f6712673 804 p[1] == CILEN_CHAR && \
yueee_yt 0:7766f6712673 805 p[0] == opt) { \
yueee_yt 0:7766f6712673 806 len -= CILEN_CHAR; \
yueee_yt 0:7766f6712673 807 INCPTR(2, p); \
yueee_yt 0:7766f6712673 808 GETCHAR(cichar, p); \
yueee_yt 0:7766f6712673 809 no.neg = 1; \
yueee_yt 0:7766f6712673 810 code \
yueee_yt 0:7766f6712673 811 }
yueee_yt 0:7766f6712673 812 #define NAKCISHORT(opt, neg, code) \
yueee_yt 0:7766f6712673 813 if (go->neg && \
yueee_yt 0:7766f6712673 814 len >= CILEN_SHORT && \
yueee_yt 0:7766f6712673 815 p[1] == CILEN_SHORT && \
yueee_yt 0:7766f6712673 816 p[0] == opt) { \
yueee_yt 0:7766f6712673 817 len -= CILEN_SHORT; \
yueee_yt 0:7766f6712673 818 INCPTR(2, p); \
yueee_yt 0:7766f6712673 819 GETSHORT(cishort, p); \
yueee_yt 0:7766f6712673 820 no.neg = 1; \
yueee_yt 0:7766f6712673 821 code \
yueee_yt 0:7766f6712673 822 }
yueee_yt 0:7766f6712673 823 #define NAKCILONG(opt, neg, code) \
yueee_yt 0:7766f6712673 824 if (go->neg && \
yueee_yt 0:7766f6712673 825 len >= CILEN_LONG && \
yueee_yt 0:7766f6712673 826 p[1] == CILEN_LONG && \
yueee_yt 0:7766f6712673 827 p[0] == opt) { \
yueee_yt 0:7766f6712673 828 len -= CILEN_LONG; \
yueee_yt 0:7766f6712673 829 INCPTR(2, p); \
yueee_yt 0:7766f6712673 830 GETLONG(cilong, p); \
yueee_yt 0:7766f6712673 831 no.neg = 1; \
yueee_yt 0:7766f6712673 832 code \
yueee_yt 0:7766f6712673 833 }
yueee_yt 0:7766f6712673 834 #define NAKCILQR(opt, neg, code) \
yueee_yt 0:7766f6712673 835 if (go->neg && \
yueee_yt 0:7766f6712673 836 len >= CILEN_LQR && \
yueee_yt 0:7766f6712673 837 p[1] == CILEN_LQR && \
yueee_yt 0:7766f6712673 838 p[0] == opt) { \
yueee_yt 0:7766f6712673 839 len -= CILEN_LQR; \
yueee_yt 0:7766f6712673 840 INCPTR(2, p); \
yueee_yt 0:7766f6712673 841 GETSHORT(cishort, p); \
yueee_yt 0:7766f6712673 842 GETLONG(cilong, p); \
yueee_yt 0:7766f6712673 843 no.neg = 1; \
yueee_yt 0:7766f6712673 844 code \
yueee_yt 0:7766f6712673 845 }
yueee_yt 0:7766f6712673 846
yueee_yt 0:7766f6712673 847 /*
yueee_yt 0:7766f6712673 848 * We don't care if they want to send us smaller packets than
yueee_yt 0:7766f6712673 849 * we want. Therefore, accept any MRU less than what we asked for,
yueee_yt 0:7766f6712673 850 * but then ignore the new value when setting the MRU in the kernel.
yueee_yt 0:7766f6712673 851 * If they send us a bigger MRU than what we asked, accept it, up to
yueee_yt 0:7766f6712673 852 * the limit of the default MRU we'd get if we didn't negotiate.
yueee_yt 0:7766f6712673 853 */
yueee_yt 0:7766f6712673 854 if (go->neg_mru && go->mru != PPP_DEFMRU) {
yueee_yt 0:7766f6712673 855 NAKCISHORT(CI_MRU, neg_mru,
yueee_yt 0:7766f6712673 856 if (cishort <= wo->mru || cishort < PPP_DEFMRU) {
yueee_yt 0:7766f6712673 857 try.mru = cishort;
yueee_yt 0:7766f6712673 858 }
yueee_yt 0:7766f6712673 859 );
yueee_yt 0:7766f6712673 860 }
yueee_yt 0:7766f6712673 861
yueee_yt 0:7766f6712673 862 /*
yueee_yt 0:7766f6712673 863 * Add any characters they want to our (receive-side) asyncmap.
yueee_yt 0:7766f6712673 864 */
yueee_yt 0:7766f6712673 865 if (go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) {
yueee_yt 0:7766f6712673 866 NAKCILONG(CI_ASYNCMAP, neg_asyncmap,
yueee_yt 0:7766f6712673 867 try.asyncmap = go->asyncmap | cilong;
yueee_yt 0:7766f6712673 868 );
yueee_yt 0:7766f6712673 869 }
yueee_yt 0:7766f6712673 870
yueee_yt 0:7766f6712673 871 /*
yueee_yt 0:7766f6712673 872 * If they've nak'd our authentication-protocol, check whether
yueee_yt 0:7766f6712673 873 * they are proposing a different protocol, or a different
yueee_yt 0:7766f6712673 874 * hash algorithm for CHAP.
yueee_yt 0:7766f6712673 875 */
yueee_yt 0:7766f6712673 876 if ((go->neg_chap || go->neg_upap)
yueee_yt 0:7766f6712673 877 && len >= CILEN_SHORT
yueee_yt 0:7766f6712673 878 && p[0] == CI_AUTHTYPE && p[1] >= CILEN_SHORT && p[1] <= len) {
yueee_yt 0:7766f6712673 879 cilen = p[1];
yueee_yt 0:7766f6712673 880 len -= cilen;
yueee_yt 0:7766f6712673 881 no.neg_chap = go->neg_chap;
yueee_yt 0:7766f6712673 882 no.neg_upap = go->neg_upap;
yueee_yt 0:7766f6712673 883 INCPTR(2, p);
yueee_yt 0:7766f6712673 884 GETSHORT(cishort, p);
yueee_yt 0:7766f6712673 885 if (cishort == PPP_PAP && cilen == CILEN_SHORT) {
yueee_yt 0:7766f6712673 886 /*
yueee_yt 0:7766f6712673 887 * If we were asking for CHAP, they obviously don't want to do it.
yueee_yt 0:7766f6712673 888 * If we weren't asking for CHAP, then we were asking for PAP,
yueee_yt 0:7766f6712673 889 * in which case this Nak is bad.
yueee_yt 0:7766f6712673 890 */
yueee_yt 0:7766f6712673 891 if (!go->neg_chap) {
yueee_yt 0:7766f6712673 892 goto bad;
yueee_yt 0:7766f6712673 893 }
yueee_yt 0:7766f6712673 894 try.neg_chap = 0;
yueee_yt 0:7766f6712673 895
yueee_yt 0:7766f6712673 896 } else if (cishort == PPP_CHAP && cilen == CILEN_CHAP) {
yueee_yt 0:7766f6712673 897 GETCHAR(cichar, p);
yueee_yt 0:7766f6712673 898 if (go->neg_chap) {
yueee_yt 0:7766f6712673 899 /*
yueee_yt 0:7766f6712673 900 * We were asking for CHAP/MD5; they must want a different
yueee_yt 0:7766f6712673 901 * algorithm. If they can't do MD5, we'll have to stop
yueee_yt 0:7766f6712673 902 * asking for CHAP.
yueee_yt 0:7766f6712673 903 */
yueee_yt 0:7766f6712673 904 if (cichar != go->chap_mdtype) {
yueee_yt 0:7766f6712673 905 try.neg_chap = 0;
yueee_yt 0:7766f6712673 906 }
yueee_yt 0:7766f6712673 907 } else {
yueee_yt 0:7766f6712673 908 /*
yueee_yt 0:7766f6712673 909 * Stop asking for PAP if we were asking for it.
yueee_yt 0:7766f6712673 910 */
yueee_yt 0:7766f6712673 911 try.neg_upap = 0;
yueee_yt 0:7766f6712673 912 }
yueee_yt 0:7766f6712673 913
yueee_yt 0:7766f6712673 914 } else {
yueee_yt 0:7766f6712673 915 /*
yueee_yt 0:7766f6712673 916 * We don't recognize what they're suggesting.
yueee_yt 0:7766f6712673 917 * Stop asking for what we were asking for.
yueee_yt 0:7766f6712673 918 */
yueee_yt 0:7766f6712673 919 if (go->neg_chap) {
yueee_yt 0:7766f6712673 920 try.neg_chap = 0;
yueee_yt 0:7766f6712673 921 } else {
yueee_yt 0:7766f6712673 922 try.neg_upap = 0;
yueee_yt 0:7766f6712673 923 }
yueee_yt 0:7766f6712673 924 p += cilen - CILEN_SHORT;
yueee_yt 0:7766f6712673 925 }
yueee_yt 0:7766f6712673 926 }
yueee_yt 0:7766f6712673 927
yueee_yt 0:7766f6712673 928 /*
yueee_yt 0:7766f6712673 929 * If they can't cope with our link quality protocol, we'll have
yueee_yt 0:7766f6712673 930 * to stop asking for LQR. We haven't got any other protocol.
yueee_yt 0:7766f6712673 931 * If they Nak the reporting period, take their value XXX ?
yueee_yt 0:7766f6712673 932 */
yueee_yt 0:7766f6712673 933 NAKCILQR(CI_QUALITY, neg_lqr,
yueee_yt 0:7766f6712673 934 if (cishort != PPP_LQR) {
yueee_yt 0:7766f6712673 935 try.neg_lqr = 0;
yueee_yt 0:7766f6712673 936 } else {
yueee_yt 0:7766f6712673 937 try.lqr_period = cilong;
yueee_yt 0:7766f6712673 938 }
yueee_yt 0:7766f6712673 939 );
yueee_yt 0:7766f6712673 940
yueee_yt 0:7766f6712673 941 /*
yueee_yt 0:7766f6712673 942 * Only implementing CBCP...not the rest of the callback options
yueee_yt 0:7766f6712673 943 */
yueee_yt 0:7766f6712673 944 NAKCICHAR(CI_CALLBACK, neg_cbcp,
yueee_yt 0:7766f6712673 945 try.neg_cbcp = 0;
yueee_yt 0:7766f6712673 946 );
yueee_yt 0:7766f6712673 947
yueee_yt 0:7766f6712673 948 /*
yueee_yt 0:7766f6712673 949 * Check for a looped-back line.
yueee_yt 0:7766f6712673 950 */
yueee_yt 0:7766f6712673 951 NAKCILONG(CI_MAGICNUMBER, neg_magicnumber,
yueee_yt 0:7766f6712673 952 try.magicnumber = magic();
yueee_yt 0:7766f6712673 953 looped_back = 1;
yueee_yt 0:7766f6712673 954 );
yueee_yt 0:7766f6712673 955
yueee_yt 0:7766f6712673 956 /*
yueee_yt 0:7766f6712673 957 * Peer shouldn't send Nak for protocol compression or
yueee_yt 0:7766f6712673 958 * address/control compression requests; they should send
yueee_yt 0:7766f6712673 959 * a Reject instead. If they send a Nak, treat it as a Reject.
yueee_yt 0:7766f6712673 960 */
yueee_yt 0:7766f6712673 961 NAKCIVOID(CI_PCOMPRESSION, neg_pcompression,
yueee_yt 0:7766f6712673 962 try.neg_pcompression = 0;
yueee_yt 0:7766f6712673 963 );
yueee_yt 0:7766f6712673 964 NAKCIVOID(CI_ACCOMPRESSION, neg_accompression,
yueee_yt 0:7766f6712673 965 try.neg_accompression = 0;
yueee_yt 0:7766f6712673 966 );
yueee_yt 0:7766f6712673 967
yueee_yt 0:7766f6712673 968 /*
yueee_yt 0:7766f6712673 969 * There may be remaining CIs, if the peer is requesting negotiation
yueee_yt 0:7766f6712673 970 * on an option that we didn't include in our request packet.
yueee_yt 0:7766f6712673 971 * If we see an option that we requested, or one we've already seen
yueee_yt 0:7766f6712673 972 * in this packet, then this packet is bad.
yueee_yt 0:7766f6712673 973 * If we wanted to respond by starting to negotiate on the requested
yueee_yt 0:7766f6712673 974 * option(s), we could, but we don't, because except for the
yueee_yt 0:7766f6712673 975 * authentication type and quality protocol, if we are not negotiating
yueee_yt 0:7766f6712673 976 * an option, it is because we were told not to.
yueee_yt 0:7766f6712673 977 * For the authentication type, the Nak from the peer means
yueee_yt 0:7766f6712673 978 * `let me authenticate myself with you' which is a bit pointless.
yueee_yt 0:7766f6712673 979 * For the quality protocol, the Nak means `ask me to send you quality
yueee_yt 0:7766f6712673 980 * reports', but if we didn't ask for them, we don't want them.
yueee_yt 0:7766f6712673 981 * An option we don't recognize represents the peer asking to
yueee_yt 0:7766f6712673 982 * negotiate some option we don't support, so ignore it.
yueee_yt 0:7766f6712673 983 */
yueee_yt 0:7766f6712673 984 while (len > CILEN_VOID) {
yueee_yt 0:7766f6712673 985 GETCHAR(citype, p);
yueee_yt 0:7766f6712673 986 GETCHAR(cilen, p);
yueee_yt 0:7766f6712673 987 if (cilen < CILEN_VOID || (len -= cilen) < 0) {
yueee_yt 0:7766f6712673 988 goto bad;
yueee_yt 0:7766f6712673 989 }
yueee_yt 0:7766f6712673 990 next = p + cilen - 2;
yueee_yt 0:7766f6712673 991
yueee_yt 0:7766f6712673 992 switch (citype) {
yueee_yt 0:7766f6712673 993 case CI_MRU:
yueee_yt 0:7766f6712673 994 if ((go->neg_mru && go->mru != PPP_DEFMRU)
yueee_yt 0:7766f6712673 995 || no.neg_mru || cilen != CILEN_SHORT) {
yueee_yt 0:7766f6712673 996 goto bad;
yueee_yt 0:7766f6712673 997 }
yueee_yt 0:7766f6712673 998 GETSHORT(cishort, p);
yueee_yt 0:7766f6712673 999 if (cishort < PPP_DEFMRU) {
yueee_yt 0:7766f6712673 1000 try.mru = cishort;
yueee_yt 0:7766f6712673 1001 }
yueee_yt 0:7766f6712673 1002 break;
yueee_yt 0:7766f6712673 1003 case CI_ASYNCMAP:
yueee_yt 0:7766f6712673 1004 if ((go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl)
yueee_yt 0:7766f6712673 1005 || no.neg_asyncmap || cilen != CILEN_LONG) {
yueee_yt 0:7766f6712673 1006 goto bad;
yueee_yt 0:7766f6712673 1007 }
yueee_yt 0:7766f6712673 1008 break;
yueee_yt 0:7766f6712673 1009 case CI_AUTHTYPE:
yueee_yt 0:7766f6712673 1010 if (go->neg_chap || no.neg_chap || go->neg_upap || no.neg_upap) {
yueee_yt 0:7766f6712673 1011 goto bad;
yueee_yt 0:7766f6712673 1012 }
yueee_yt 0:7766f6712673 1013 break;
yueee_yt 0:7766f6712673 1014 case CI_MAGICNUMBER:
yueee_yt 0:7766f6712673 1015 if (go->neg_magicnumber || no.neg_magicnumber ||
yueee_yt 0:7766f6712673 1016 cilen != CILEN_LONG) {
yueee_yt 0:7766f6712673 1017 goto bad;
yueee_yt 0:7766f6712673 1018 }
yueee_yt 0:7766f6712673 1019 break;
yueee_yt 0:7766f6712673 1020 case CI_PCOMPRESSION:
yueee_yt 0:7766f6712673 1021 if (go->neg_pcompression || no.neg_pcompression
yueee_yt 0:7766f6712673 1022 || cilen != CILEN_VOID) {
yueee_yt 0:7766f6712673 1023 goto bad;
yueee_yt 0:7766f6712673 1024 }
yueee_yt 0:7766f6712673 1025 break;
yueee_yt 0:7766f6712673 1026 case CI_ACCOMPRESSION:
yueee_yt 0:7766f6712673 1027 if (go->neg_accompression || no.neg_accompression
yueee_yt 0:7766f6712673 1028 || cilen != CILEN_VOID) {
yueee_yt 0:7766f6712673 1029 goto bad;
yueee_yt 0:7766f6712673 1030 }
yueee_yt 0:7766f6712673 1031 break;
yueee_yt 0:7766f6712673 1032 case CI_QUALITY:
yueee_yt 0:7766f6712673 1033 if (go->neg_lqr || no.neg_lqr || cilen != CILEN_LQR) {
yueee_yt 0:7766f6712673 1034 goto bad;
yueee_yt 0:7766f6712673 1035 }
yueee_yt 0:7766f6712673 1036 break;
yueee_yt 0:7766f6712673 1037 }
yueee_yt 0:7766f6712673 1038 p = next;
yueee_yt 0:7766f6712673 1039 }
yueee_yt 0:7766f6712673 1040
yueee_yt 0:7766f6712673 1041 /* If there is still anything left, this packet is bad. */
yueee_yt 0:7766f6712673 1042 if (len != 0) {
yueee_yt 0:7766f6712673 1043 goto bad;
yueee_yt 0:7766f6712673 1044 }
yueee_yt 0:7766f6712673 1045
yueee_yt 0:7766f6712673 1046 /*
yueee_yt 0:7766f6712673 1047 * OK, the Nak is good. Now we can update state.
yueee_yt 0:7766f6712673 1048 */
yueee_yt 0:7766f6712673 1049 if (f->state != LS_OPENED) {
yueee_yt 0:7766f6712673 1050 if (looped_back) {
yueee_yt 0:7766f6712673 1051 if (++try.numloops >= lcp_loopbackfail) {
yueee_yt 0:7766f6712673 1052 LCPDEBUG(LOG_NOTICE, ("Serial line is looped back.\n"));
yueee_yt 0:7766f6712673 1053 lcp_close(f->unit, "Loopback detected");
yueee_yt 0:7766f6712673 1054 }
yueee_yt 0:7766f6712673 1055 } else {
yueee_yt 0:7766f6712673 1056 try.numloops = 0;
yueee_yt 0:7766f6712673 1057 }
yueee_yt 0:7766f6712673 1058 *go = try;
yueee_yt 0:7766f6712673 1059 }
yueee_yt 0:7766f6712673 1060
yueee_yt 0:7766f6712673 1061 return 1;
yueee_yt 0:7766f6712673 1062
yueee_yt 0:7766f6712673 1063 bad:
yueee_yt 0:7766f6712673 1064 LCPDEBUG(LOG_WARNING, ("lcp_nakci: received bad Nak!\n"));
yueee_yt 0:7766f6712673 1065 return 0;
yueee_yt 0:7766f6712673 1066 }
yueee_yt 0:7766f6712673 1067
yueee_yt 0:7766f6712673 1068
yueee_yt 0:7766f6712673 1069 /*
yueee_yt 0:7766f6712673 1070 * lcp_rejci - Peer has Rejected some of our CIs.
yueee_yt 0:7766f6712673 1071 * This should not modify any state if the Reject is bad
yueee_yt 0:7766f6712673 1072 * or if LCP is in the LS_OPENED state.
yueee_yt 0:7766f6712673 1073 *
yueee_yt 0:7766f6712673 1074 * Returns:
yueee_yt 0:7766f6712673 1075 * 0 - Reject was bad.
yueee_yt 0:7766f6712673 1076 * 1 - Reject was good.
yueee_yt 0:7766f6712673 1077 */
yueee_yt 0:7766f6712673 1078 static int
yueee_yt 0:7766f6712673 1079 lcp_rejci(fsm *f, u_char *p, int len)
yueee_yt 0:7766f6712673 1080 {
yueee_yt 0:7766f6712673 1081 lcp_options *go = &lcp_gotoptions[f->unit];
yueee_yt 0:7766f6712673 1082 u_char cichar;
yueee_yt 0:7766f6712673 1083 u_short cishort;
yueee_yt 0:7766f6712673 1084 u32_t cilong;
yueee_yt 0:7766f6712673 1085 lcp_options try; /* options to request next time */
yueee_yt 0:7766f6712673 1086
yueee_yt 0:7766f6712673 1087 try = *go;
yueee_yt 0:7766f6712673 1088
yueee_yt 0:7766f6712673 1089 /*
yueee_yt 0:7766f6712673 1090 * Any Rejected CIs must be in exactly the same order that we sent.
yueee_yt 0:7766f6712673 1091 * Check packet length and CI length at each step.
yueee_yt 0:7766f6712673 1092 * If we find any deviations, then this packet is bad.
yueee_yt 0:7766f6712673 1093 */
yueee_yt 0:7766f6712673 1094 #define REJCIVOID(opt, neg) \
yueee_yt 0:7766f6712673 1095 if (go->neg && \
yueee_yt 0:7766f6712673 1096 len >= CILEN_VOID && \
yueee_yt 0:7766f6712673 1097 p[1] == CILEN_VOID && \
yueee_yt 0:7766f6712673 1098 p[0] == opt) { \
yueee_yt 0:7766f6712673 1099 len -= CILEN_VOID; \
yueee_yt 0:7766f6712673 1100 INCPTR(CILEN_VOID, p); \
yueee_yt 0:7766f6712673 1101 try.neg = 0; \
yueee_yt 0:7766f6712673 1102 LCPDEBUG(LOG_INFO, ("lcp_rejci: void opt %d rejected\n", opt)); \
yueee_yt 0:7766f6712673 1103 }
yueee_yt 0:7766f6712673 1104 #define REJCISHORT(opt, neg, val) \
yueee_yt 0:7766f6712673 1105 if (go->neg && \
yueee_yt 0:7766f6712673 1106 len >= CILEN_SHORT && \
yueee_yt 0:7766f6712673 1107 p[1] == CILEN_SHORT && \
yueee_yt 0:7766f6712673 1108 p[0] == opt) { \
yueee_yt 0:7766f6712673 1109 len -= CILEN_SHORT; \
yueee_yt 0:7766f6712673 1110 INCPTR(2, p); \
yueee_yt 0:7766f6712673 1111 GETSHORT(cishort, p); \
yueee_yt 0:7766f6712673 1112 /* Check rejected value. */ \
yueee_yt 0:7766f6712673 1113 if (cishort != val) { \
yueee_yt 0:7766f6712673 1114 goto bad; \
yueee_yt 0:7766f6712673 1115 } \
yueee_yt 0:7766f6712673 1116 try.neg = 0; \
yueee_yt 0:7766f6712673 1117 LCPDEBUG(LOG_INFO, ("lcp_rejci: short opt %d rejected\n", opt)); \
yueee_yt 0:7766f6712673 1118 }
yueee_yt 0:7766f6712673 1119 #define REJCICHAP(opt, neg, val, digest) \
yueee_yt 0:7766f6712673 1120 if (go->neg && \
yueee_yt 0:7766f6712673 1121 len >= CILEN_CHAP && \
yueee_yt 0:7766f6712673 1122 p[1] == CILEN_CHAP && \
yueee_yt 0:7766f6712673 1123 p[0] == opt) { \
yueee_yt 0:7766f6712673 1124 len -= CILEN_CHAP; \
yueee_yt 0:7766f6712673 1125 INCPTR(2, p); \
yueee_yt 0:7766f6712673 1126 GETSHORT(cishort, p); \
yueee_yt 0:7766f6712673 1127 GETCHAR(cichar, p); \
yueee_yt 0:7766f6712673 1128 /* Check rejected value. */ \
yueee_yt 0:7766f6712673 1129 if (cishort != val || cichar != digest) { \
yueee_yt 0:7766f6712673 1130 goto bad; \
yueee_yt 0:7766f6712673 1131 } \
yueee_yt 0:7766f6712673 1132 try.neg = 0; \
yueee_yt 0:7766f6712673 1133 try.neg_upap = 0; \
yueee_yt 0:7766f6712673 1134 LCPDEBUG(LOG_INFO, ("lcp_rejci: chap opt %d rejected\n", opt)); \
yueee_yt 0:7766f6712673 1135 }
yueee_yt 0:7766f6712673 1136 #define REJCILONG(opt, neg, val) \
yueee_yt 0:7766f6712673 1137 if (go->neg && \
yueee_yt 0:7766f6712673 1138 len >= CILEN_LONG && \
yueee_yt 0:7766f6712673 1139 p[1] == CILEN_LONG && \
yueee_yt 0:7766f6712673 1140 p[0] == opt) { \
yueee_yt 0:7766f6712673 1141 len -= CILEN_LONG; \
yueee_yt 0:7766f6712673 1142 INCPTR(2, p); \
yueee_yt 0:7766f6712673 1143 GETLONG(cilong, p); \
yueee_yt 0:7766f6712673 1144 /* Check rejected value. */ \
yueee_yt 0:7766f6712673 1145 if (cilong != val) { \
yueee_yt 0:7766f6712673 1146 goto bad; \
yueee_yt 0:7766f6712673 1147 } \
yueee_yt 0:7766f6712673 1148 try.neg = 0; \
yueee_yt 0:7766f6712673 1149 LCPDEBUG(LOG_INFO, ("lcp_rejci: long opt %d rejected\n", opt)); \
yueee_yt 0:7766f6712673 1150 }
yueee_yt 0:7766f6712673 1151 #define REJCILQR(opt, neg, val) \
yueee_yt 0:7766f6712673 1152 if (go->neg && \
yueee_yt 0:7766f6712673 1153 len >= CILEN_LQR && \
yueee_yt 0:7766f6712673 1154 p[1] == CILEN_LQR && \
yueee_yt 0:7766f6712673 1155 p[0] == opt) { \
yueee_yt 0:7766f6712673 1156 len -= CILEN_LQR; \
yueee_yt 0:7766f6712673 1157 INCPTR(2, p); \
yueee_yt 0:7766f6712673 1158 GETSHORT(cishort, p); \
yueee_yt 0:7766f6712673 1159 GETLONG(cilong, p); \
yueee_yt 0:7766f6712673 1160 /* Check rejected value. */ \
yueee_yt 0:7766f6712673 1161 if (cishort != PPP_LQR || cilong != val) { \
yueee_yt 0:7766f6712673 1162 goto bad; \
yueee_yt 0:7766f6712673 1163 } \
yueee_yt 0:7766f6712673 1164 try.neg = 0; \
yueee_yt 0:7766f6712673 1165 LCPDEBUG(LOG_INFO, ("lcp_rejci: LQR opt %d rejected\n", opt)); \
yueee_yt 0:7766f6712673 1166 }
yueee_yt 0:7766f6712673 1167 #define REJCICBCP(opt, neg, val) \
yueee_yt 0:7766f6712673 1168 if (go->neg && \
yueee_yt 0:7766f6712673 1169 len >= CILEN_CBCP && \
yueee_yt 0:7766f6712673 1170 p[1] == CILEN_CBCP && \
yueee_yt 0:7766f6712673 1171 p[0] == opt) { \
yueee_yt 0:7766f6712673 1172 len -= CILEN_CBCP; \
yueee_yt 0:7766f6712673 1173 INCPTR(2, p); \
yueee_yt 0:7766f6712673 1174 GETCHAR(cichar, p); \
yueee_yt 0:7766f6712673 1175 /* Check rejected value. */ \
yueee_yt 0:7766f6712673 1176 if (cichar != val) { \
yueee_yt 0:7766f6712673 1177 goto bad; \
yueee_yt 0:7766f6712673 1178 } \
yueee_yt 0:7766f6712673 1179 try.neg = 0; \
yueee_yt 0:7766f6712673 1180 LCPDEBUG(LOG_INFO, ("lcp_rejci: Callback opt %d rejected\n", opt)); \
yueee_yt 0:7766f6712673 1181 }
yueee_yt 0:7766f6712673 1182
yueee_yt 0:7766f6712673 1183 REJCISHORT(CI_MRU, neg_mru, go->mru);
yueee_yt 0:7766f6712673 1184 REJCILONG(CI_ASYNCMAP, neg_asyncmap, go->asyncmap);
yueee_yt 0:7766f6712673 1185 REJCICHAP(CI_AUTHTYPE, neg_chap, PPP_CHAP, go->chap_mdtype);
yueee_yt 0:7766f6712673 1186 if (!go->neg_chap) {
yueee_yt 0:7766f6712673 1187 REJCISHORT(CI_AUTHTYPE, neg_upap, PPP_PAP);
yueee_yt 0:7766f6712673 1188 }
yueee_yt 0:7766f6712673 1189 REJCILQR(CI_QUALITY, neg_lqr, go->lqr_period);
yueee_yt 0:7766f6712673 1190 REJCICBCP(CI_CALLBACK, neg_cbcp, CBCP_OPT);
yueee_yt 0:7766f6712673 1191 REJCILONG(CI_MAGICNUMBER, neg_magicnumber, go->magicnumber);
yueee_yt 0:7766f6712673 1192 REJCIVOID(CI_PCOMPRESSION, neg_pcompression);
yueee_yt 0:7766f6712673 1193 REJCIVOID(CI_ACCOMPRESSION, neg_accompression);
yueee_yt 0:7766f6712673 1194
yueee_yt 0:7766f6712673 1195 /*
yueee_yt 0:7766f6712673 1196 * If there are any remaining CIs, then this packet is bad.
yueee_yt 0:7766f6712673 1197 */
yueee_yt 0:7766f6712673 1198 if (len != 0) {
yueee_yt 0:7766f6712673 1199 goto bad;
yueee_yt 0:7766f6712673 1200 }
yueee_yt 0:7766f6712673 1201 /*
yueee_yt 0:7766f6712673 1202 * Now we can update state.
yueee_yt 0:7766f6712673 1203 */
yueee_yt 0:7766f6712673 1204 if (f->state != LS_OPENED) {
yueee_yt 0:7766f6712673 1205 *go = try;
yueee_yt 0:7766f6712673 1206 }
yueee_yt 0:7766f6712673 1207 return 1;
yueee_yt 0:7766f6712673 1208
yueee_yt 0:7766f6712673 1209 bad:
yueee_yt 0:7766f6712673 1210 LCPDEBUG(LOG_WARNING, ("lcp_rejci: received bad Reject!\n"));
yueee_yt 0:7766f6712673 1211 return 0;
yueee_yt 0:7766f6712673 1212 }
yueee_yt 0:7766f6712673 1213
yueee_yt 0:7766f6712673 1214
yueee_yt 0:7766f6712673 1215 /*
yueee_yt 0:7766f6712673 1216 * lcp_reqci - Check the peer's requested CIs and send appropriate response.
yueee_yt 0:7766f6712673 1217 *
yueee_yt 0:7766f6712673 1218 * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
yueee_yt 0:7766f6712673 1219 * appropriately. If reject_if_disagree is non-zero, doesn't return
yueee_yt 0:7766f6712673 1220 * CONFNAK; returns CONFREJ if it can't return CONFACK.
yueee_yt 0:7766f6712673 1221 */
yueee_yt 0:7766f6712673 1222 static int
yueee_yt 0:7766f6712673 1223 lcp_reqci(fsm *f,
yueee_yt 0:7766f6712673 1224 u_char *inp, /* Requested CIs */
yueee_yt 0:7766f6712673 1225 int *lenp, /* Length of requested CIs */
yueee_yt 0:7766f6712673 1226 int reject_if_disagree)
yueee_yt 0:7766f6712673 1227 {
yueee_yt 0:7766f6712673 1228 lcp_options *go = &lcp_gotoptions[f->unit];
yueee_yt 0:7766f6712673 1229 lcp_options *ho = &lcp_hisoptions[f->unit];
yueee_yt 0:7766f6712673 1230 lcp_options *ao = &lcp_allowoptions[f->unit];
yueee_yt 0:7766f6712673 1231 u_char *cip, *next; /* Pointer to current and next CIs */
yueee_yt 0:7766f6712673 1232 int cilen, citype; /* Parsed len, type */
yueee_yt 0:7766f6712673 1233 u_char cichar; /* Parsed char value */
yueee_yt 0:7766f6712673 1234 u_short cishort; /* Parsed short value */
yueee_yt 0:7766f6712673 1235 u32_t cilong; /* Parse long value */
yueee_yt 0:7766f6712673 1236 int rc = CONFACK; /* Final packet return code */
yueee_yt 0:7766f6712673 1237 int orc; /* Individual option return code */
yueee_yt 0:7766f6712673 1238 u_char *p; /* Pointer to next char to parse */
yueee_yt 0:7766f6712673 1239 u_char *rejp; /* Pointer to next char in reject frame */
yueee_yt 0:7766f6712673 1240 u_char *nakp; /* Pointer to next char in Nak frame */
yueee_yt 0:7766f6712673 1241 int l = *lenp; /* Length left */
yueee_yt 0:7766f6712673 1242 #if TRACELCP > 0
yueee_yt 0:7766f6712673 1243 char traceBuf[80];
yueee_yt 0:7766f6712673 1244 size_t traceNdx = 0;
yueee_yt 0:7766f6712673 1245 #endif
yueee_yt 0:7766f6712673 1246
yueee_yt 0:7766f6712673 1247 /*
yueee_yt 0:7766f6712673 1248 * Reset all his options.
yueee_yt 0:7766f6712673 1249 */
yueee_yt 0:7766f6712673 1250 BZERO(ho, sizeof(*ho));
yueee_yt 0:7766f6712673 1251
yueee_yt 0:7766f6712673 1252 /*
yueee_yt 0:7766f6712673 1253 * Process all his options.
yueee_yt 0:7766f6712673 1254 */
yueee_yt 0:7766f6712673 1255 next = inp;
yueee_yt 0:7766f6712673 1256 nakp = nak_buffer;
yueee_yt 0:7766f6712673 1257 rejp = inp;
yueee_yt 0:7766f6712673 1258 while (l) {
yueee_yt 0:7766f6712673 1259 orc = CONFACK; /* Assume success */
yueee_yt 0:7766f6712673 1260 cip = p = next; /* Remember begining of CI */
yueee_yt 0:7766f6712673 1261 if (l < 2 || /* Not enough data for CI header or */
yueee_yt 0:7766f6712673 1262 p[1] < 2 || /* CI length too small or */
yueee_yt 0:7766f6712673 1263 p[1] > l) { /* CI length too big? */
yueee_yt 0:7766f6712673 1264 LCPDEBUG(LOG_WARNING, ("lcp_reqci: bad CI length!\n"));
yueee_yt 0:7766f6712673 1265 orc = CONFREJ; /* Reject bad CI */
yueee_yt 0:7766f6712673 1266 cilen = l; /* Reject till end of packet */
yueee_yt 0:7766f6712673 1267 l = 0; /* Don't loop again */
yueee_yt 0:7766f6712673 1268 citype = 0;
yueee_yt 0:7766f6712673 1269 goto endswitch;
yueee_yt 0:7766f6712673 1270 }
yueee_yt 0:7766f6712673 1271 GETCHAR(citype, p); /* Parse CI type */
yueee_yt 0:7766f6712673 1272 GETCHAR(cilen, p); /* Parse CI length */
yueee_yt 0:7766f6712673 1273 l -= cilen; /* Adjust remaining length */
yueee_yt 0:7766f6712673 1274 next += cilen; /* Step to next CI */
yueee_yt 0:7766f6712673 1275
yueee_yt 0:7766f6712673 1276 switch (citype) { /* Check CI type */
yueee_yt 0:7766f6712673 1277 case CI_MRU:
yueee_yt 0:7766f6712673 1278 if (!ao->neg_mru) { /* Allow option? */
yueee_yt 0:7766f6712673 1279 LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - not allowed\n"));
yueee_yt 0:7766f6712673 1280 orc = CONFREJ; /* Reject CI */
yueee_yt 0:7766f6712673 1281 break;
yueee_yt 0:7766f6712673 1282 } else if (cilen != CILEN_SHORT) { /* Check CI length */
yueee_yt 0:7766f6712673 1283 LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - bad length\n"));
yueee_yt 0:7766f6712673 1284 orc = CONFREJ; /* Reject CI */
yueee_yt 0:7766f6712673 1285 break;
yueee_yt 0:7766f6712673 1286 }
yueee_yt 0:7766f6712673 1287 GETSHORT(cishort, p); /* Parse MRU */
yueee_yt 0:7766f6712673 1288
yueee_yt 0:7766f6712673 1289 /*
yueee_yt 0:7766f6712673 1290 * He must be able to receive at least our minimum.
yueee_yt 0:7766f6712673 1291 * No need to check a maximum. If he sends a large number,
yueee_yt 0:7766f6712673 1292 * we'll just ignore it.
yueee_yt 0:7766f6712673 1293 */
yueee_yt 0:7766f6712673 1294 if (cishort < PPP_MINMRU) {
yueee_yt 0:7766f6712673 1295 LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak - MRU too small\n"));
yueee_yt 0:7766f6712673 1296 orc = CONFNAK; /* Nak CI */
yueee_yt 0:7766f6712673 1297 PUTCHAR(CI_MRU, nakp);
yueee_yt 0:7766f6712673 1298 PUTCHAR(CILEN_SHORT, nakp);
yueee_yt 0:7766f6712673 1299 PUTSHORT(PPP_MINMRU, nakp); /* Give him a hint */
yueee_yt 0:7766f6712673 1300 break;
yueee_yt 0:7766f6712673 1301 }
yueee_yt 0:7766f6712673 1302 ho->neg_mru = 1; /* Remember he sent MRU */
yueee_yt 0:7766f6712673 1303 ho->mru = cishort; /* And remember value */
yueee_yt 0:7766f6712673 1304 #if TRACELCP > 0
yueee_yt 0:7766f6712673 1305 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MRU %d", cishort);
yueee_yt 0:7766f6712673 1306 traceNdx = strlen(traceBuf);
yueee_yt 0:7766f6712673 1307 #endif
yueee_yt 0:7766f6712673 1308 break;
yueee_yt 0:7766f6712673 1309
yueee_yt 0:7766f6712673 1310 case CI_ASYNCMAP:
yueee_yt 0:7766f6712673 1311 if (!ao->neg_asyncmap) {
yueee_yt 0:7766f6712673 1312 LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP not allowed\n"));
yueee_yt 0:7766f6712673 1313 orc = CONFREJ;
yueee_yt 0:7766f6712673 1314 break;
yueee_yt 0:7766f6712673 1315 } else if (cilen != CILEN_LONG) {
yueee_yt 0:7766f6712673 1316 LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP bad length\n"));
yueee_yt 0:7766f6712673 1317 orc = CONFREJ;
yueee_yt 0:7766f6712673 1318 break;
yueee_yt 0:7766f6712673 1319 }
yueee_yt 0:7766f6712673 1320 GETLONG(cilong, p);
yueee_yt 0:7766f6712673 1321
yueee_yt 0:7766f6712673 1322 /*
yueee_yt 0:7766f6712673 1323 * Asyncmap must have set at least the bits
yueee_yt 0:7766f6712673 1324 * which are set in lcp_allowoptions[unit].asyncmap.
yueee_yt 0:7766f6712673 1325 */
yueee_yt 0:7766f6712673 1326 if ((ao->asyncmap & ~cilong) != 0) {
yueee_yt 0:7766f6712673 1327 LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak ASYNCMAP %lX missing %lX\n",
yueee_yt 0:7766f6712673 1328 cilong, ao->asyncmap));
yueee_yt 0:7766f6712673 1329 orc = CONFNAK;
yueee_yt 0:7766f6712673 1330 PUTCHAR(CI_ASYNCMAP, nakp);
yueee_yt 0:7766f6712673 1331 PUTCHAR(CILEN_LONG, nakp);
yueee_yt 0:7766f6712673 1332 PUTLONG(ao->asyncmap | cilong, nakp);
yueee_yt 0:7766f6712673 1333 break;
yueee_yt 0:7766f6712673 1334 }
yueee_yt 0:7766f6712673 1335 ho->neg_asyncmap = 1;
yueee_yt 0:7766f6712673 1336 ho->asyncmap = cilong;
yueee_yt 0:7766f6712673 1337 #if TRACELCP > 0
yueee_yt 0:7766f6712673 1338 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ASYNCMAP=%lX", cilong);
yueee_yt 0:7766f6712673 1339 traceNdx = strlen(traceBuf);
yueee_yt 0:7766f6712673 1340 #endif
yueee_yt 0:7766f6712673 1341 break;
yueee_yt 0:7766f6712673 1342
yueee_yt 0:7766f6712673 1343 case CI_AUTHTYPE:
yueee_yt 0:7766f6712673 1344 if (cilen < CILEN_SHORT) {
yueee_yt 0:7766f6712673 1345 LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE missing arg\n"));
yueee_yt 0:7766f6712673 1346 orc = CONFREJ;
yueee_yt 0:7766f6712673 1347 break;
yueee_yt 0:7766f6712673 1348 } else if (!(ao->neg_upap || ao->neg_chap)) {
yueee_yt 0:7766f6712673 1349 /*
yueee_yt 0:7766f6712673 1350 * Reject the option if we're not willing to authenticate.
yueee_yt 0:7766f6712673 1351 */
yueee_yt 0:7766f6712673 1352 LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE not allowed\n"));
yueee_yt 0:7766f6712673 1353 orc = CONFREJ;
yueee_yt 0:7766f6712673 1354 break;
yueee_yt 0:7766f6712673 1355 }
yueee_yt 0:7766f6712673 1356 GETSHORT(cishort, p);
yueee_yt 0:7766f6712673 1357
yueee_yt 0:7766f6712673 1358 /*
yueee_yt 0:7766f6712673 1359 * Authtype must be UPAP or CHAP.
yueee_yt 0:7766f6712673 1360 *
yueee_yt 0:7766f6712673 1361 * Note: if both ao->neg_upap and ao->neg_chap are set,
yueee_yt 0:7766f6712673 1362 * and the peer sends a Configure-Request with two
yueee_yt 0:7766f6712673 1363 * authenticate-protocol requests, one for CHAP and one
yueee_yt 0:7766f6712673 1364 * for UPAP, then we will reject the second request.
yueee_yt 0:7766f6712673 1365 * Whether we end up doing CHAP or UPAP depends then on
yueee_yt 0:7766f6712673 1366 * the ordering of the CIs in the peer's Configure-Request.
yueee_yt 0:7766f6712673 1367 */
yueee_yt 0:7766f6712673 1368
yueee_yt 0:7766f6712673 1369 if (cishort == PPP_PAP) {
yueee_yt 0:7766f6712673 1370 if (ho->neg_chap) { /* we've already accepted CHAP */
yueee_yt 0:7766f6712673 1371 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP already accepted\n"));
yueee_yt 0:7766f6712673 1372 orc = CONFREJ;
yueee_yt 0:7766f6712673 1373 break;
yueee_yt 0:7766f6712673 1374 } else if (cilen != CILEN_SHORT) {
yueee_yt 0:7766f6712673 1375 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP bad len\n"));
yueee_yt 0:7766f6712673 1376 orc = CONFREJ;
yueee_yt 0:7766f6712673 1377 break;
yueee_yt 0:7766f6712673 1378 }
yueee_yt 0:7766f6712673 1379 if (!ao->neg_upap) { /* we don't want to do PAP */
yueee_yt 0:7766f6712673 1380 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE PAP not allowed\n"));
yueee_yt 0:7766f6712673 1381 orc = CONFNAK; /* NAK it and suggest CHAP */
yueee_yt 0:7766f6712673 1382 PUTCHAR(CI_AUTHTYPE, nakp);
yueee_yt 0:7766f6712673 1383 PUTCHAR(CILEN_CHAP, nakp);
yueee_yt 0:7766f6712673 1384 PUTSHORT(PPP_CHAP, nakp);
yueee_yt 0:7766f6712673 1385 PUTCHAR(ao->chap_mdtype, nakp);
yueee_yt 0:7766f6712673 1386 break;
yueee_yt 0:7766f6712673 1387 }
yueee_yt 0:7766f6712673 1388 ho->neg_upap = 1;
yueee_yt 0:7766f6712673 1389 #if TRACELCP > 0
yueee_yt 0:7766f6712673 1390 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PAP (%X)", cishort);
yueee_yt 0:7766f6712673 1391 traceNdx = strlen(traceBuf);
yueee_yt 0:7766f6712673 1392 #endif
yueee_yt 0:7766f6712673 1393 break;
yueee_yt 0:7766f6712673 1394 }
yueee_yt 0:7766f6712673 1395 if (cishort == PPP_CHAP) {
yueee_yt 0:7766f6712673 1396 if (ho->neg_upap) { /* we've already accepted PAP */
yueee_yt 0:7766f6712673 1397 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP accepted PAP\n"));
yueee_yt 0:7766f6712673 1398 orc = CONFREJ;
yueee_yt 0:7766f6712673 1399 break;
yueee_yt 0:7766f6712673 1400 } else if (cilen != CILEN_CHAP) {
yueee_yt 0:7766f6712673 1401 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP bad len\n"));
yueee_yt 0:7766f6712673 1402 orc = CONFREJ;
yueee_yt 0:7766f6712673 1403 break;
yueee_yt 0:7766f6712673 1404 }
yueee_yt 0:7766f6712673 1405 if (!ao->neg_chap) { /* we don't want to do CHAP */
yueee_yt 0:7766f6712673 1406 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP not allowed\n"));
yueee_yt 0:7766f6712673 1407 orc = CONFNAK; /* NAK it and suggest PAP */
yueee_yt 0:7766f6712673 1408 PUTCHAR(CI_AUTHTYPE, nakp);
yueee_yt 0:7766f6712673 1409 PUTCHAR(CILEN_SHORT, nakp);
yueee_yt 0:7766f6712673 1410 PUTSHORT(PPP_PAP, nakp);
yueee_yt 0:7766f6712673 1411 break;
yueee_yt 0:7766f6712673 1412 }
yueee_yt 0:7766f6712673 1413 GETCHAR(cichar, p); /* get digest type*/
yueee_yt 0:7766f6712673 1414 if (cichar != CHAP_DIGEST_MD5
yueee_yt 0:7766f6712673 1415 #if MSCHAP_SUPPORT
yueee_yt 0:7766f6712673 1416 && cichar != CHAP_MICROSOFT
yueee_yt 0:7766f6712673 1417 #endif
yueee_yt 0:7766f6712673 1418 ) {
yueee_yt 0:7766f6712673 1419 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP digest=%d\n", (int)cichar));
yueee_yt 0:7766f6712673 1420 orc = CONFNAK;
yueee_yt 0:7766f6712673 1421 PUTCHAR(CI_AUTHTYPE, nakp);
yueee_yt 0:7766f6712673 1422 PUTCHAR(CILEN_CHAP, nakp);
yueee_yt 0:7766f6712673 1423 PUTSHORT(PPP_CHAP, nakp);
yueee_yt 0:7766f6712673 1424 PUTCHAR(ao->chap_mdtype, nakp);
yueee_yt 0:7766f6712673 1425 break;
yueee_yt 0:7766f6712673 1426 }
yueee_yt 0:7766f6712673 1427 #if TRACELCP > 0
yueee_yt 0:7766f6712673 1428 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CHAP %X,%d", cishort, (int)cichar);
yueee_yt 0:7766f6712673 1429 traceNdx = strlen(traceBuf);
yueee_yt 0:7766f6712673 1430 #endif
yueee_yt 0:7766f6712673 1431 ho->chap_mdtype = cichar; /* save md type */
yueee_yt 0:7766f6712673 1432 ho->neg_chap = 1;
yueee_yt 0:7766f6712673 1433 break;
yueee_yt 0:7766f6712673 1434 }
yueee_yt 0:7766f6712673 1435
yueee_yt 0:7766f6712673 1436 /*
yueee_yt 0:7766f6712673 1437 * We don't recognize the protocol they're asking for.
yueee_yt 0:7766f6712673 1438 * Nak it with something we're willing to do.
yueee_yt 0:7766f6712673 1439 * (At this point we know ao->neg_upap || ao->neg_chap.)
yueee_yt 0:7766f6712673 1440 */
yueee_yt 0:7766f6712673 1441 orc = CONFNAK;
yueee_yt 0:7766f6712673 1442 PUTCHAR(CI_AUTHTYPE, nakp);
yueee_yt 0:7766f6712673 1443 if (ao->neg_chap) {
yueee_yt 0:7766f6712673 1444 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req CHAP\n", cishort));
yueee_yt 0:7766f6712673 1445 PUTCHAR(CILEN_CHAP, nakp);
yueee_yt 0:7766f6712673 1446 PUTSHORT(PPP_CHAP, nakp);
yueee_yt 0:7766f6712673 1447 PUTCHAR(ao->chap_mdtype, nakp);
yueee_yt 0:7766f6712673 1448 } else {
yueee_yt 0:7766f6712673 1449 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req PAP\n", cishort));
yueee_yt 0:7766f6712673 1450 PUTCHAR(CILEN_SHORT, nakp);
yueee_yt 0:7766f6712673 1451 PUTSHORT(PPP_PAP, nakp);
yueee_yt 0:7766f6712673 1452 }
yueee_yt 0:7766f6712673 1453 break;
yueee_yt 0:7766f6712673 1454
yueee_yt 0:7766f6712673 1455 case CI_QUALITY:
yueee_yt 0:7766f6712673 1456 GETSHORT(cishort, p);
yueee_yt 0:7766f6712673 1457 GETLONG(cilong, p);
yueee_yt 0:7766f6712673 1458 #if TRACELCP > 0
yueee_yt 0:7766f6712673 1459 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " QUALITY (%x %x)", cishort, (unsigned int) cilong);
yueee_yt 0:7766f6712673 1460 traceNdx = strlen(traceBuf);
yueee_yt 0:7766f6712673 1461 #endif
yueee_yt 0:7766f6712673 1462
yueee_yt 0:7766f6712673 1463 if (!ao->neg_lqr ||
yueee_yt 0:7766f6712673 1464 cilen != CILEN_LQR) {
yueee_yt 0:7766f6712673 1465 orc = CONFREJ;
yueee_yt 0:7766f6712673 1466 break;
yueee_yt 0:7766f6712673 1467 }
yueee_yt 0:7766f6712673 1468
yueee_yt 0:7766f6712673 1469 /*
yueee_yt 0:7766f6712673 1470 * Check the protocol and the reporting period.
yueee_yt 0:7766f6712673 1471 * XXX When should we Nak this, and what with?
yueee_yt 0:7766f6712673 1472 */
yueee_yt 0:7766f6712673 1473 if (cishort != PPP_LQR) {
yueee_yt 0:7766f6712673 1474 orc = CONFNAK;
yueee_yt 0:7766f6712673 1475 PUTCHAR(CI_QUALITY, nakp);
yueee_yt 0:7766f6712673 1476 PUTCHAR(CILEN_LQR, nakp);
yueee_yt 0:7766f6712673 1477 PUTSHORT(PPP_LQR, nakp);
yueee_yt 0:7766f6712673 1478 PUTLONG(ao->lqr_period, nakp);
yueee_yt 0:7766f6712673 1479 break;
yueee_yt 0:7766f6712673 1480 }
yueee_yt 0:7766f6712673 1481 break;
yueee_yt 0:7766f6712673 1482
yueee_yt 0:7766f6712673 1483 case CI_MAGICNUMBER:
yueee_yt 0:7766f6712673 1484 if (!(ao->neg_magicnumber || go->neg_magicnumber) ||
yueee_yt 0:7766f6712673 1485 cilen != CILEN_LONG) {
yueee_yt 0:7766f6712673 1486 orc = CONFREJ;
yueee_yt 0:7766f6712673 1487 break;
yueee_yt 0:7766f6712673 1488 }
yueee_yt 0:7766f6712673 1489 GETLONG(cilong, p);
yueee_yt 0:7766f6712673 1490 #if TRACELCP > 0
yueee_yt 0:7766f6712673 1491 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MAGICNUMBER (%lX)", cilong);
yueee_yt 0:7766f6712673 1492 traceNdx = strlen(traceBuf);
yueee_yt 0:7766f6712673 1493 #endif
yueee_yt 0:7766f6712673 1494
yueee_yt 0:7766f6712673 1495 /*
yueee_yt 0:7766f6712673 1496 * He must have a different magic number.
yueee_yt 0:7766f6712673 1497 */
yueee_yt 0:7766f6712673 1498 if (go->neg_magicnumber &&
yueee_yt 0:7766f6712673 1499 cilong == go->magicnumber) {
yueee_yt 0:7766f6712673 1500 cilong = magic(); /* Don't put magic() inside macro! */
yueee_yt 0:7766f6712673 1501 orc = CONFNAK;
yueee_yt 0:7766f6712673 1502 PUTCHAR(CI_MAGICNUMBER, nakp);
yueee_yt 0:7766f6712673 1503 PUTCHAR(CILEN_LONG, nakp);
yueee_yt 0:7766f6712673 1504 PUTLONG(cilong, nakp);
yueee_yt 0:7766f6712673 1505 break;
yueee_yt 0:7766f6712673 1506 }
yueee_yt 0:7766f6712673 1507 ho->neg_magicnumber = 1;
yueee_yt 0:7766f6712673 1508 ho->magicnumber = cilong;
yueee_yt 0:7766f6712673 1509 break;
yueee_yt 0:7766f6712673 1510
yueee_yt 0:7766f6712673 1511
yueee_yt 0:7766f6712673 1512 case CI_PCOMPRESSION:
yueee_yt 0:7766f6712673 1513 #if TRACELCP > 0
yueee_yt 0:7766f6712673 1514 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PCOMPRESSION");
yueee_yt 0:7766f6712673 1515 traceNdx = strlen(traceBuf);
yueee_yt 0:7766f6712673 1516 #endif
yueee_yt 0:7766f6712673 1517 if (!ao->neg_pcompression ||
yueee_yt 0:7766f6712673 1518 cilen != CILEN_VOID) {
yueee_yt 0:7766f6712673 1519 orc = CONFREJ;
yueee_yt 0:7766f6712673 1520 break;
yueee_yt 0:7766f6712673 1521 }
yueee_yt 0:7766f6712673 1522 ho->neg_pcompression = 1;
yueee_yt 0:7766f6712673 1523 break;
yueee_yt 0:7766f6712673 1524
yueee_yt 0:7766f6712673 1525 case CI_ACCOMPRESSION:
yueee_yt 0:7766f6712673 1526 #if TRACELCP > 0
yueee_yt 0:7766f6712673 1527 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ACCOMPRESSION");
yueee_yt 0:7766f6712673 1528 traceNdx = strlen(traceBuf);
yueee_yt 0:7766f6712673 1529 #endif
yueee_yt 0:7766f6712673 1530 if (!ao->neg_accompression ||
yueee_yt 0:7766f6712673 1531 cilen != CILEN_VOID) {
yueee_yt 0:7766f6712673 1532 orc = CONFREJ;
yueee_yt 0:7766f6712673 1533 break;
yueee_yt 0:7766f6712673 1534 }
yueee_yt 0:7766f6712673 1535 ho->neg_accompression = 1;
yueee_yt 0:7766f6712673 1536 break;
yueee_yt 0:7766f6712673 1537
yueee_yt 0:7766f6712673 1538 case CI_MRRU:
yueee_yt 0:7766f6712673 1539 #if TRACELCP > 0
yueee_yt 0:7766f6712673 1540 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_MRRU");
yueee_yt 0:7766f6712673 1541 traceNdx = strlen(traceBuf);
yueee_yt 0:7766f6712673 1542 #endif
yueee_yt 0:7766f6712673 1543 orc = CONFREJ;
yueee_yt 0:7766f6712673 1544 break;
yueee_yt 0:7766f6712673 1545
yueee_yt 0:7766f6712673 1546 case CI_SSNHF:
yueee_yt 0:7766f6712673 1547 #if TRACELCP > 0
yueee_yt 0:7766f6712673 1548 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_SSNHF");
yueee_yt 0:7766f6712673 1549 traceNdx = strlen(traceBuf);
yueee_yt 0:7766f6712673 1550 #endif
yueee_yt 0:7766f6712673 1551 orc = CONFREJ;
yueee_yt 0:7766f6712673 1552 break;
yueee_yt 0:7766f6712673 1553
yueee_yt 0:7766f6712673 1554 case CI_EPDISC:
yueee_yt 0:7766f6712673 1555 #if TRACELCP > 0
yueee_yt 0:7766f6712673 1556 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_EPDISC");
yueee_yt 0:7766f6712673 1557 traceNdx = strlen(traceBuf);
yueee_yt 0:7766f6712673 1558 #endif
yueee_yt 0:7766f6712673 1559 orc = CONFREJ;
yueee_yt 0:7766f6712673 1560 break;
yueee_yt 0:7766f6712673 1561
yueee_yt 0:7766f6712673 1562 default:
yueee_yt 0:7766f6712673 1563 #if TRACELCP
yueee_yt 0:7766f6712673 1564 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " unknown %d", citype);
yueee_yt 0:7766f6712673 1565 traceNdx = strlen(traceBuf);
yueee_yt 0:7766f6712673 1566 #endif
yueee_yt 0:7766f6712673 1567 orc = CONFREJ;
yueee_yt 0:7766f6712673 1568 break;
yueee_yt 0:7766f6712673 1569 }
yueee_yt 0:7766f6712673 1570
yueee_yt 0:7766f6712673 1571 endswitch:
yueee_yt 0:7766f6712673 1572 #if TRACELCP
yueee_yt 0:7766f6712673 1573 if (traceNdx >= 80 - 32) {
yueee_yt 0:7766f6712673 1574 LCPDEBUG(LOG_INFO, ("lcp_reqci: rcvd%s\n", traceBuf));
yueee_yt 0:7766f6712673 1575 traceNdx = 0;
yueee_yt 0:7766f6712673 1576 }
yueee_yt 0:7766f6712673 1577 #endif
yueee_yt 0:7766f6712673 1578 if (orc == CONFACK && /* Good CI */
yueee_yt 0:7766f6712673 1579 rc != CONFACK) { /* but prior CI wasnt? */
yueee_yt 0:7766f6712673 1580 continue; /* Don't send this one */
yueee_yt 0:7766f6712673 1581 }
yueee_yt 0:7766f6712673 1582
yueee_yt 0:7766f6712673 1583 if (orc == CONFNAK) { /* Nak this CI? */
yueee_yt 0:7766f6712673 1584 if (reject_if_disagree /* Getting fed up with sending NAKs? */
yueee_yt 0:7766f6712673 1585 && citype != CI_MAGICNUMBER) {
yueee_yt 0:7766f6712673 1586 orc = CONFREJ; /* Get tough if so */
yueee_yt 0:7766f6712673 1587 } else {
yueee_yt 0:7766f6712673 1588 if (rc == CONFREJ) { /* Rejecting prior CI? */
yueee_yt 0:7766f6712673 1589 continue; /* Don't send this one */
yueee_yt 0:7766f6712673 1590 }
yueee_yt 0:7766f6712673 1591 rc = CONFNAK;
yueee_yt 0:7766f6712673 1592 }
yueee_yt 0:7766f6712673 1593 }
yueee_yt 0:7766f6712673 1594 if (orc == CONFREJ) { /* Reject this CI */
yueee_yt 0:7766f6712673 1595 rc = CONFREJ;
yueee_yt 0:7766f6712673 1596 if (cip != rejp) { /* Need to move rejected CI? */
yueee_yt 0:7766f6712673 1597 BCOPY(cip, rejp, cilen); /* Move it */
yueee_yt 0:7766f6712673 1598 }
yueee_yt 0:7766f6712673 1599 INCPTR(cilen, rejp); /* Update output pointer */
yueee_yt 0:7766f6712673 1600 }
yueee_yt 0:7766f6712673 1601 }
yueee_yt 0:7766f6712673 1602
yueee_yt 0:7766f6712673 1603 /*
yueee_yt 0:7766f6712673 1604 * If we wanted to send additional NAKs (for unsent CIs), the
yueee_yt 0:7766f6712673 1605 * code would go here. The extra NAKs would go at *nakp.
yueee_yt 0:7766f6712673 1606 * At present there are no cases where we want to ask the
yueee_yt 0:7766f6712673 1607 * peer to negotiate an option.
yueee_yt 0:7766f6712673 1608 */
yueee_yt 0:7766f6712673 1609
yueee_yt 0:7766f6712673 1610 switch (rc) {
yueee_yt 0:7766f6712673 1611 case CONFACK:
yueee_yt 0:7766f6712673 1612 *lenp = (int)(next - inp);
yueee_yt 0:7766f6712673 1613 break;
yueee_yt 0:7766f6712673 1614 case CONFNAK:
yueee_yt 0:7766f6712673 1615 /*
yueee_yt 0:7766f6712673 1616 * Copy the Nak'd options from the nak_buffer to the caller's buffer.
yueee_yt 0:7766f6712673 1617 */
yueee_yt 0:7766f6712673 1618 *lenp = (int)(nakp - nak_buffer);
yueee_yt 0:7766f6712673 1619 BCOPY(nak_buffer, inp, *lenp);
yueee_yt 0:7766f6712673 1620 break;
yueee_yt 0:7766f6712673 1621 case CONFREJ:
yueee_yt 0:7766f6712673 1622 *lenp = (int)(rejp - inp);
yueee_yt 0:7766f6712673 1623 break;
yueee_yt 0:7766f6712673 1624 }
yueee_yt 0:7766f6712673 1625
yueee_yt 0:7766f6712673 1626 #if TRACELCP > 0
yueee_yt 0:7766f6712673 1627 if (traceNdx > 0) {
yueee_yt 0:7766f6712673 1628 LCPDEBUG(LOG_INFO, ("lcp_reqci: %s\n", traceBuf));
yueee_yt 0:7766f6712673 1629 }
yueee_yt 0:7766f6712673 1630 #endif
yueee_yt 0:7766f6712673 1631 LCPDEBUG(LOG_INFO, ("lcp_reqci: returning CONF%s.\n", CODENAME(rc)));
yueee_yt 0:7766f6712673 1632 return (rc); /* Return final code */
yueee_yt 0:7766f6712673 1633 }
yueee_yt 0:7766f6712673 1634
yueee_yt 0:7766f6712673 1635
yueee_yt 0:7766f6712673 1636 /*
yueee_yt 0:7766f6712673 1637 * lcp_up - LCP has come UP.
yueee_yt 0:7766f6712673 1638 */
yueee_yt 0:7766f6712673 1639 static void
yueee_yt 0:7766f6712673 1640 lcp_up(fsm *f)
yueee_yt 0:7766f6712673 1641 {
yueee_yt 0:7766f6712673 1642 lcp_options *wo = &lcp_wantoptions[f->unit];
yueee_yt 0:7766f6712673 1643 lcp_options *ho = &lcp_hisoptions[f->unit];
yueee_yt 0:7766f6712673 1644 lcp_options *go = &lcp_gotoptions[f->unit];
yueee_yt 0:7766f6712673 1645 lcp_options *ao = &lcp_allowoptions[f->unit];
yueee_yt 0:7766f6712673 1646
yueee_yt 0:7766f6712673 1647 if (!go->neg_magicnumber) {
yueee_yt 0:7766f6712673 1648 go->magicnumber = 0;
yueee_yt 0:7766f6712673 1649 }
yueee_yt 0:7766f6712673 1650 if (!ho->neg_magicnumber) {
yueee_yt 0:7766f6712673 1651 ho->magicnumber = 0;
yueee_yt 0:7766f6712673 1652 }
yueee_yt 0:7766f6712673 1653
yueee_yt 0:7766f6712673 1654 /*
yueee_yt 0:7766f6712673 1655 * Set our MTU to the smaller of the MTU we wanted and
yueee_yt 0:7766f6712673 1656 * the MRU our peer wanted. If we negotiated an MRU,
yueee_yt 0:7766f6712673 1657 * set our MRU to the larger of value we wanted and
yueee_yt 0:7766f6712673 1658 * the value we got in the negotiation.
yueee_yt 0:7766f6712673 1659 */
yueee_yt 0:7766f6712673 1660 ppp_send_config(f->unit, LWIP_MIN(ao->mru, (ho->neg_mru? ho->mru: PPP_MRU)),
yueee_yt 0:7766f6712673 1661 (ho->neg_asyncmap? ho->asyncmap: 0xffffffffl),
yueee_yt 0:7766f6712673 1662 ho->neg_pcompression, ho->neg_accompression);
yueee_yt 0:7766f6712673 1663 /*
yueee_yt 0:7766f6712673 1664 * If the asyncmap hasn't been negotiated, we really should
yueee_yt 0:7766f6712673 1665 * set the receive asyncmap to ffffffff, but we set it to 0
yueee_yt 0:7766f6712673 1666 * for backwards contemptibility.
yueee_yt 0:7766f6712673 1667 */
yueee_yt 0:7766f6712673 1668 ppp_recv_config(f->unit, (go->neg_mru? LWIP_MAX(wo->mru, go->mru): PPP_MRU),
yueee_yt 0:7766f6712673 1669 (go->neg_asyncmap? go->asyncmap: 0x00000000),
yueee_yt 0:7766f6712673 1670 go->neg_pcompression, go->neg_accompression);
yueee_yt 0:7766f6712673 1671
yueee_yt 0:7766f6712673 1672 if (ho->neg_mru) {
yueee_yt 0:7766f6712673 1673 peer_mru[f->unit] = ho->mru;
yueee_yt 0:7766f6712673 1674 }
yueee_yt 0:7766f6712673 1675
yueee_yt 0:7766f6712673 1676 lcp_echo_lowerup(f->unit); /* Enable echo messages */
yueee_yt 0:7766f6712673 1677
yueee_yt 0:7766f6712673 1678 link_established(f->unit); /* The link is up; authenticate now */
yueee_yt 0:7766f6712673 1679 }
yueee_yt 0:7766f6712673 1680
yueee_yt 0:7766f6712673 1681
yueee_yt 0:7766f6712673 1682 /*
yueee_yt 0:7766f6712673 1683 * lcp_down - LCP has gone DOWN.
yueee_yt 0:7766f6712673 1684 *
yueee_yt 0:7766f6712673 1685 * Alert other protocols.
yueee_yt 0:7766f6712673 1686 */
yueee_yt 0:7766f6712673 1687 static void
yueee_yt 0:7766f6712673 1688 lcp_down(fsm *f)
yueee_yt 0:7766f6712673 1689 {
yueee_yt 0:7766f6712673 1690 lcp_options *go = &lcp_gotoptions[f->unit];
yueee_yt 0:7766f6712673 1691
yueee_yt 0:7766f6712673 1692 lcp_echo_lowerdown(f->unit);
yueee_yt 0:7766f6712673 1693
yueee_yt 0:7766f6712673 1694 link_down(f->unit);
yueee_yt 0:7766f6712673 1695
yueee_yt 0:7766f6712673 1696 ppp_send_config(f->unit, PPP_MRU, 0xffffffffl, 0, 0);
yueee_yt 0:7766f6712673 1697 ppp_recv_config(f->unit, PPP_MRU,
yueee_yt 0:7766f6712673 1698 (go->neg_asyncmap? go->asyncmap: 0x00000000),
yueee_yt 0:7766f6712673 1699 go->neg_pcompression, go->neg_accompression);
yueee_yt 0:7766f6712673 1700 peer_mru[f->unit] = PPP_MRU;
yueee_yt 0:7766f6712673 1701 }
yueee_yt 0:7766f6712673 1702
yueee_yt 0:7766f6712673 1703
yueee_yt 0:7766f6712673 1704 /*
yueee_yt 0:7766f6712673 1705 * lcp_starting - LCP needs the lower layer up.
yueee_yt 0:7766f6712673 1706 */
yueee_yt 0:7766f6712673 1707 static void
yueee_yt 0:7766f6712673 1708 lcp_starting(fsm *f)
yueee_yt 0:7766f6712673 1709 {
yueee_yt 0:7766f6712673 1710 link_required(f->unit); /* lwip: currently does nothing */
yueee_yt 0:7766f6712673 1711 }
yueee_yt 0:7766f6712673 1712
yueee_yt 0:7766f6712673 1713
yueee_yt 0:7766f6712673 1714 /*
yueee_yt 0:7766f6712673 1715 * lcp_finished - LCP has finished with the lower layer.
yueee_yt 0:7766f6712673 1716 */
yueee_yt 0:7766f6712673 1717 static void
yueee_yt 0:7766f6712673 1718 lcp_finished(fsm *f)
yueee_yt 0:7766f6712673 1719 {
yueee_yt 0:7766f6712673 1720 link_terminated(f->unit); /* we are finished with the link */
yueee_yt 0:7766f6712673 1721 }
yueee_yt 0:7766f6712673 1722
yueee_yt 0:7766f6712673 1723
yueee_yt 0:7766f6712673 1724 #if PPP_ADDITIONAL_CALLBACKS
yueee_yt 0:7766f6712673 1725 /*
yueee_yt 0:7766f6712673 1726 * print_string - print a readable representation of a string using
yueee_yt 0:7766f6712673 1727 * printer.
yueee_yt 0:7766f6712673 1728 */
yueee_yt 0:7766f6712673 1729 static void
yueee_yt 0:7766f6712673 1730 print_string( char *p, int len, void (*printer) (void *, char *, ...), void *arg)
yueee_yt 0:7766f6712673 1731 {
yueee_yt 0:7766f6712673 1732 int c;
yueee_yt 0:7766f6712673 1733
yueee_yt 0:7766f6712673 1734 printer(arg, "\"");
yueee_yt 0:7766f6712673 1735 for (; len > 0; --len) {
yueee_yt 0:7766f6712673 1736 c = *p++;
yueee_yt 0:7766f6712673 1737 if (' ' <= c && c <= '~') {
yueee_yt 0:7766f6712673 1738 if (c == '\\' || c == '"') {
yueee_yt 0:7766f6712673 1739 printer(arg, "\\");
yueee_yt 0:7766f6712673 1740 }
yueee_yt 0:7766f6712673 1741 printer(arg, "%c", c);
yueee_yt 0:7766f6712673 1742 } else {
yueee_yt 0:7766f6712673 1743 switch (c) {
yueee_yt 0:7766f6712673 1744 case '\n':
yueee_yt 0:7766f6712673 1745 printer(arg, "\\n");
yueee_yt 0:7766f6712673 1746 break;
yueee_yt 0:7766f6712673 1747 case '\r':
yueee_yt 0:7766f6712673 1748 printer(arg, "\\r");
yueee_yt 0:7766f6712673 1749 break;
yueee_yt 0:7766f6712673 1750 case '\t':
yueee_yt 0:7766f6712673 1751 printer(arg, "\\t");
yueee_yt 0:7766f6712673 1752 break;
yueee_yt 0:7766f6712673 1753 default:
yueee_yt 0:7766f6712673 1754 printer(arg, "\\%.3o", c);
yueee_yt 0:7766f6712673 1755 }
yueee_yt 0:7766f6712673 1756 }
yueee_yt 0:7766f6712673 1757 }
yueee_yt 0:7766f6712673 1758 printer(arg, "\"");
yueee_yt 0:7766f6712673 1759 }
yueee_yt 0:7766f6712673 1760
yueee_yt 0:7766f6712673 1761
yueee_yt 0:7766f6712673 1762 /*
yueee_yt 0:7766f6712673 1763 * lcp_printpkt - print the contents of an LCP packet.
yueee_yt 0:7766f6712673 1764 */
yueee_yt 0:7766f6712673 1765 static char *lcp_codenames[] = {
yueee_yt 0:7766f6712673 1766 "ConfReq", "ConfAck", "ConfNak", "ConfRej",
yueee_yt 0:7766f6712673 1767 "TermReq", "TermAck", "CodeRej", "ProtRej",
yueee_yt 0:7766f6712673 1768 "EchoReq", "EchoRep", "DiscReq"
yueee_yt 0:7766f6712673 1769 };
yueee_yt 0:7766f6712673 1770
yueee_yt 0:7766f6712673 1771 static int
yueee_yt 0:7766f6712673 1772 lcp_printpkt( u_char *p, int plen, void (*printer) (void *, char *, ...), void *arg)
yueee_yt 0:7766f6712673 1773 {
yueee_yt 0:7766f6712673 1774 int code, id, len, olen;
yueee_yt 0:7766f6712673 1775 u_char *pstart, *optend;
yueee_yt 0:7766f6712673 1776 u_short cishort;
yueee_yt 0:7766f6712673 1777 u32_t cilong;
yueee_yt 0:7766f6712673 1778
yueee_yt 0:7766f6712673 1779 if (plen < HEADERLEN) {
yueee_yt 0:7766f6712673 1780 return 0;
yueee_yt 0:7766f6712673 1781 }
yueee_yt 0:7766f6712673 1782 pstart = p;
yueee_yt 0:7766f6712673 1783 GETCHAR(code, p);
yueee_yt 0:7766f6712673 1784 GETCHAR(id, p);
yueee_yt 0:7766f6712673 1785 GETSHORT(len, p);
yueee_yt 0:7766f6712673 1786 if (len < HEADERLEN || len > plen) {
yueee_yt 0:7766f6712673 1787 return 0;
yueee_yt 0:7766f6712673 1788 }
yueee_yt 0:7766f6712673 1789
yueee_yt 0:7766f6712673 1790 if (code >= 1 && code <= sizeof(lcp_codenames) / sizeof(char *)) {
yueee_yt 0:7766f6712673 1791 printer(arg, " %s", lcp_codenames[code-1]);
yueee_yt 0:7766f6712673 1792 } else {
yueee_yt 0:7766f6712673 1793 printer(arg, " code=0x%x", code);
yueee_yt 0:7766f6712673 1794 }
yueee_yt 0:7766f6712673 1795 printer(arg, " id=0x%x", id);
yueee_yt 0:7766f6712673 1796 len -= HEADERLEN;
yueee_yt 0:7766f6712673 1797 switch (code) {
yueee_yt 0:7766f6712673 1798 case CONFREQ:
yueee_yt 0:7766f6712673 1799 case CONFACK:
yueee_yt 0:7766f6712673 1800 case CONFNAK:
yueee_yt 0:7766f6712673 1801 case CONFREJ:
yueee_yt 0:7766f6712673 1802 /* print option list */
yueee_yt 0:7766f6712673 1803 while (len >= 2) {
yueee_yt 0:7766f6712673 1804 GETCHAR(code, p);
yueee_yt 0:7766f6712673 1805 GETCHAR(olen, p);
yueee_yt 0:7766f6712673 1806 p -= 2;
yueee_yt 0:7766f6712673 1807 if (olen < 2 || olen > len) {
yueee_yt 0:7766f6712673 1808 break;
yueee_yt 0:7766f6712673 1809 }
yueee_yt 0:7766f6712673 1810 printer(arg, " <");
yueee_yt 0:7766f6712673 1811 len -= olen;
yueee_yt 0:7766f6712673 1812 optend = p + olen;
yueee_yt 0:7766f6712673 1813 switch (code) {
yueee_yt 0:7766f6712673 1814 case CI_MRU:
yueee_yt 0:7766f6712673 1815 if (olen == CILEN_SHORT) {
yueee_yt 0:7766f6712673 1816 p += 2;
yueee_yt 0:7766f6712673 1817 GETSHORT(cishort, p);
yueee_yt 0:7766f6712673 1818 printer(arg, "mru %d", cishort);
yueee_yt 0:7766f6712673 1819 }
yueee_yt 0:7766f6712673 1820 break;
yueee_yt 0:7766f6712673 1821 case CI_ASYNCMAP:
yueee_yt 0:7766f6712673 1822 if (olen == CILEN_LONG) {
yueee_yt 0:7766f6712673 1823 p += 2;
yueee_yt 0:7766f6712673 1824 GETLONG(cilong, p);
yueee_yt 0:7766f6712673 1825 printer(arg, "asyncmap 0x%lx", cilong);
yueee_yt 0:7766f6712673 1826 }
yueee_yt 0:7766f6712673 1827 break;
yueee_yt 0:7766f6712673 1828 case CI_AUTHTYPE:
yueee_yt 0:7766f6712673 1829 if (olen >= CILEN_SHORT) {
yueee_yt 0:7766f6712673 1830 p += 2;
yueee_yt 0:7766f6712673 1831 printer(arg, "auth ");
yueee_yt 0:7766f6712673 1832 GETSHORT(cishort, p);
yueee_yt 0:7766f6712673 1833 switch (cishort) {
yueee_yt 0:7766f6712673 1834 case PPP_PAP:
yueee_yt 0:7766f6712673 1835 printer(arg, "pap");
yueee_yt 0:7766f6712673 1836 break;
yueee_yt 0:7766f6712673 1837 case PPP_CHAP:
yueee_yt 0:7766f6712673 1838 printer(arg, "chap");
yueee_yt 0:7766f6712673 1839 break;
yueee_yt 0:7766f6712673 1840 default:
yueee_yt 0:7766f6712673 1841 printer(arg, "0x%x", cishort);
yueee_yt 0:7766f6712673 1842 }
yueee_yt 0:7766f6712673 1843 }
yueee_yt 0:7766f6712673 1844 break;
yueee_yt 0:7766f6712673 1845 case CI_QUALITY:
yueee_yt 0:7766f6712673 1846 if (olen >= CILEN_SHORT) {
yueee_yt 0:7766f6712673 1847 p += 2;
yueee_yt 0:7766f6712673 1848 printer(arg, "quality ");
yueee_yt 0:7766f6712673 1849 GETSHORT(cishort, p);
yueee_yt 0:7766f6712673 1850 switch (cishort) {
yueee_yt 0:7766f6712673 1851 case PPP_LQR:
yueee_yt 0:7766f6712673 1852 printer(arg, "lqr");
yueee_yt 0:7766f6712673 1853 break;
yueee_yt 0:7766f6712673 1854 default:
yueee_yt 0:7766f6712673 1855 printer(arg, "0x%x", cishort);
yueee_yt 0:7766f6712673 1856 }
yueee_yt 0:7766f6712673 1857 }
yueee_yt 0:7766f6712673 1858 break;
yueee_yt 0:7766f6712673 1859 case CI_CALLBACK:
yueee_yt 0:7766f6712673 1860 if (olen >= CILEN_CHAR) {
yueee_yt 0:7766f6712673 1861 p += 2;
yueee_yt 0:7766f6712673 1862 printer(arg, "callback ");
yueee_yt 0:7766f6712673 1863 GETSHORT(cishort, p);
yueee_yt 0:7766f6712673 1864 switch (cishort) {
yueee_yt 0:7766f6712673 1865 case CBCP_OPT:
yueee_yt 0:7766f6712673 1866 printer(arg, "CBCP");
yueee_yt 0:7766f6712673 1867 break;
yueee_yt 0:7766f6712673 1868 default:
yueee_yt 0:7766f6712673 1869 printer(arg, "0x%x", cishort);
yueee_yt 0:7766f6712673 1870 }
yueee_yt 0:7766f6712673 1871 }
yueee_yt 0:7766f6712673 1872 break;
yueee_yt 0:7766f6712673 1873 case CI_MAGICNUMBER:
yueee_yt 0:7766f6712673 1874 if (olen == CILEN_LONG) {
yueee_yt 0:7766f6712673 1875 p += 2;
yueee_yt 0:7766f6712673 1876 GETLONG(cilong, p);
yueee_yt 0:7766f6712673 1877 printer(arg, "magic 0x%x", cilong);
yueee_yt 0:7766f6712673 1878 }
yueee_yt 0:7766f6712673 1879 break;
yueee_yt 0:7766f6712673 1880 case CI_PCOMPRESSION:
yueee_yt 0:7766f6712673 1881 if (olen == CILEN_VOID) {
yueee_yt 0:7766f6712673 1882 p += 2;
yueee_yt 0:7766f6712673 1883 printer(arg, "pcomp");
yueee_yt 0:7766f6712673 1884 }
yueee_yt 0:7766f6712673 1885 break;
yueee_yt 0:7766f6712673 1886 case CI_ACCOMPRESSION:
yueee_yt 0:7766f6712673 1887 if (olen == CILEN_VOID) {
yueee_yt 0:7766f6712673 1888 p += 2;
yueee_yt 0:7766f6712673 1889 printer(arg, "accomp");
yueee_yt 0:7766f6712673 1890 }
yueee_yt 0:7766f6712673 1891 break;
yueee_yt 0:7766f6712673 1892 }
yueee_yt 0:7766f6712673 1893 while (p < optend) {
yueee_yt 0:7766f6712673 1894 GETCHAR(code, p);
yueee_yt 0:7766f6712673 1895 printer(arg, " %.2x", code);
yueee_yt 0:7766f6712673 1896 }
yueee_yt 0:7766f6712673 1897 printer(arg, ">");
yueee_yt 0:7766f6712673 1898 }
yueee_yt 0:7766f6712673 1899 break;
yueee_yt 0:7766f6712673 1900
yueee_yt 0:7766f6712673 1901 case TERMACK:
yueee_yt 0:7766f6712673 1902 case TERMREQ:
yueee_yt 0:7766f6712673 1903 if (len > 0 && *p >= ' ' && *p < 0x7f) {
yueee_yt 0:7766f6712673 1904 printer(arg, " ");
yueee_yt 0:7766f6712673 1905 print_string((char*)p, len, printer, arg);
yueee_yt 0:7766f6712673 1906 p += len;
yueee_yt 0:7766f6712673 1907 len = 0;
yueee_yt 0:7766f6712673 1908 }
yueee_yt 0:7766f6712673 1909 break;
yueee_yt 0:7766f6712673 1910
yueee_yt 0:7766f6712673 1911 case ECHOREQ:
yueee_yt 0:7766f6712673 1912 case ECHOREP:
yueee_yt 0:7766f6712673 1913 case DISCREQ:
yueee_yt 0:7766f6712673 1914 if (len >= 4) {
yueee_yt 0:7766f6712673 1915 GETLONG(cilong, p);
yueee_yt 0:7766f6712673 1916 printer(arg, " magic=0x%x", cilong);
yueee_yt 0:7766f6712673 1917 p += 4;
yueee_yt 0:7766f6712673 1918 len -= 4;
yueee_yt 0:7766f6712673 1919 }
yueee_yt 0:7766f6712673 1920 break;
yueee_yt 0:7766f6712673 1921 }
yueee_yt 0:7766f6712673 1922
yueee_yt 0:7766f6712673 1923 /* print the rest of the bytes in the packet */
yueee_yt 0:7766f6712673 1924 for (; len > 0; --len) {
yueee_yt 0:7766f6712673 1925 GETCHAR(code, p);
yueee_yt 0:7766f6712673 1926 printer(arg, " %.2x", code);
yueee_yt 0:7766f6712673 1927 }
yueee_yt 0:7766f6712673 1928
yueee_yt 0:7766f6712673 1929 return (int)(p - pstart);
yueee_yt 0:7766f6712673 1930 }
yueee_yt 0:7766f6712673 1931 #endif /* PPP_ADDITIONAL_CALLBACKS */
yueee_yt 0:7766f6712673 1932
yueee_yt 0:7766f6712673 1933 /*
yueee_yt 0:7766f6712673 1934 * Time to shut down the link because there is nothing out there.
yueee_yt 0:7766f6712673 1935 */
yueee_yt 0:7766f6712673 1936 static void
yueee_yt 0:7766f6712673 1937 LcpLinkFailure (fsm *f)
yueee_yt 0:7766f6712673 1938 {
yueee_yt 0:7766f6712673 1939 if (f->state == LS_OPENED) {
yueee_yt 0:7766f6712673 1940 LCPDEBUG(LOG_INFO, ("No response to %d echo-requests\n", lcp_echos_pending));
yueee_yt 0:7766f6712673 1941 LCPDEBUG(LOG_NOTICE, ("Serial link appears to be disconnected.\n"));
yueee_yt 0:7766f6712673 1942 lcp_close(f->unit, "Peer not responding");
yueee_yt 0:7766f6712673 1943 }
yueee_yt 0:7766f6712673 1944 }
yueee_yt 0:7766f6712673 1945
yueee_yt 0:7766f6712673 1946 /*
yueee_yt 0:7766f6712673 1947 * Timer expired for the LCP echo requests from this process.
yueee_yt 0:7766f6712673 1948 */
yueee_yt 0:7766f6712673 1949 static void
yueee_yt 0:7766f6712673 1950 LcpEchoCheck (fsm *f)
yueee_yt 0:7766f6712673 1951 {
yueee_yt 0:7766f6712673 1952 LcpSendEchoRequest (f);
yueee_yt 0:7766f6712673 1953
yueee_yt 0:7766f6712673 1954 /*
yueee_yt 0:7766f6712673 1955 * Start the timer for the next interval.
yueee_yt 0:7766f6712673 1956 */
yueee_yt 0:7766f6712673 1957 LWIP_ASSERT("lcp_echo_timer_running == 0", lcp_echo_timer_running == 0);
yueee_yt 0:7766f6712673 1958
yueee_yt 0:7766f6712673 1959 TIMEOUT (LcpEchoTimeout, f, lcp_echo_interval);
yueee_yt 0:7766f6712673 1960 lcp_echo_timer_running = 1;
yueee_yt 0:7766f6712673 1961 }
yueee_yt 0:7766f6712673 1962
yueee_yt 0:7766f6712673 1963 /*
yueee_yt 0:7766f6712673 1964 * LcpEchoTimeout - Timer expired on the LCP echo
yueee_yt 0:7766f6712673 1965 */
yueee_yt 0:7766f6712673 1966 static void
yueee_yt 0:7766f6712673 1967 LcpEchoTimeout (void *arg)
yueee_yt 0:7766f6712673 1968 {
yueee_yt 0:7766f6712673 1969 if (lcp_echo_timer_running != 0) {
yueee_yt 0:7766f6712673 1970 lcp_echo_timer_running = 0;
yueee_yt 0:7766f6712673 1971 LcpEchoCheck ((fsm *) arg);
yueee_yt 0:7766f6712673 1972 }
yueee_yt 0:7766f6712673 1973 }
yueee_yt 0:7766f6712673 1974
yueee_yt 0:7766f6712673 1975 /*
yueee_yt 0:7766f6712673 1976 * LcpEchoReply - LCP has received a reply to the echo
yueee_yt 0:7766f6712673 1977 */
yueee_yt 0:7766f6712673 1978 static void
yueee_yt 0:7766f6712673 1979 lcp_received_echo_reply (fsm *f, int id, u_char *inp, int len)
yueee_yt 0:7766f6712673 1980 {
yueee_yt 0:7766f6712673 1981 u32_t magic;
yueee_yt 0:7766f6712673 1982
yueee_yt 0:7766f6712673 1983 LWIP_UNUSED_ARG(id);
yueee_yt 0:7766f6712673 1984
yueee_yt 0:7766f6712673 1985 /* Check the magic number - don't count replies from ourselves. */
yueee_yt 0:7766f6712673 1986 if (len < 4) {
yueee_yt 0:7766f6712673 1987 LCPDEBUG(LOG_WARNING, ("lcp: received short Echo-Reply, length %d\n", len));
yueee_yt 0:7766f6712673 1988 return;
yueee_yt 0:7766f6712673 1989 }
yueee_yt 0:7766f6712673 1990 GETLONG(magic, inp);
yueee_yt 0:7766f6712673 1991 if (lcp_gotoptions[f->unit].neg_magicnumber && magic == lcp_gotoptions[f->unit].magicnumber) {
yueee_yt 0:7766f6712673 1992 LCPDEBUG(LOG_WARNING, ("appear to have received our own echo-reply!\n"));
yueee_yt 0:7766f6712673 1993 return;
yueee_yt 0:7766f6712673 1994 }
yueee_yt 0:7766f6712673 1995
yueee_yt 0:7766f6712673 1996 /* Reset the number of outstanding echo frames */
yueee_yt 0:7766f6712673 1997 lcp_echos_pending = 0;
yueee_yt 0:7766f6712673 1998 }
yueee_yt 0:7766f6712673 1999
yueee_yt 0:7766f6712673 2000 /*
yueee_yt 0:7766f6712673 2001 * LcpSendEchoRequest - Send an echo request frame to the peer
yueee_yt 0:7766f6712673 2002 */
yueee_yt 0:7766f6712673 2003 static void
yueee_yt 0:7766f6712673 2004 LcpSendEchoRequest (fsm *f)
yueee_yt 0:7766f6712673 2005 {
yueee_yt 0:7766f6712673 2006 u32_t lcp_magic;
yueee_yt 0:7766f6712673 2007 u_char pkt[4], *pktp;
yueee_yt 0:7766f6712673 2008
yueee_yt 0:7766f6712673 2009 /*
yueee_yt 0:7766f6712673 2010 * Detect the failure of the peer at this point.
yueee_yt 0:7766f6712673 2011 */
yueee_yt 0:7766f6712673 2012 if (lcp_echo_fails != 0) {
yueee_yt 0:7766f6712673 2013 if (lcp_echos_pending >= lcp_echo_fails) {
yueee_yt 0:7766f6712673 2014 LcpLinkFailure(f);
yueee_yt 0:7766f6712673 2015 lcp_echos_pending = 0;
yueee_yt 0:7766f6712673 2016 }
yueee_yt 0:7766f6712673 2017 }
yueee_yt 0:7766f6712673 2018
yueee_yt 0:7766f6712673 2019 /*
yueee_yt 0:7766f6712673 2020 * Make and send the echo request frame.
yueee_yt 0:7766f6712673 2021 */
yueee_yt 0:7766f6712673 2022 if (f->state == LS_OPENED) {
yueee_yt 0:7766f6712673 2023 lcp_magic = lcp_gotoptions[f->unit].magicnumber;
yueee_yt 0:7766f6712673 2024 pktp = pkt;
yueee_yt 0:7766f6712673 2025 PUTLONG(lcp_magic, pktp);
yueee_yt 0:7766f6712673 2026 fsm_sdata(f, ECHOREQ, (u_char)(lcp_echo_number++ & 0xFF), pkt, (int)(pktp - pkt));
yueee_yt 0:7766f6712673 2027 ++lcp_echos_pending;
yueee_yt 0:7766f6712673 2028 }
yueee_yt 0:7766f6712673 2029 }
yueee_yt 0:7766f6712673 2030
yueee_yt 0:7766f6712673 2031 /*
yueee_yt 0:7766f6712673 2032 * lcp_echo_lowerup - Start the timer for the LCP frame
yueee_yt 0:7766f6712673 2033 */
yueee_yt 0:7766f6712673 2034
yueee_yt 0:7766f6712673 2035 static void
yueee_yt 0:7766f6712673 2036 lcp_echo_lowerup (int unit)
yueee_yt 0:7766f6712673 2037 {
yueee_yt 0:7766f6712673 2038 fsm *f = &lcp_fsm[unit];
yueee_yt 0:7766f6712673 2039
yueee_yt 0:7766f6712673 2040 /* Clear the parameters for generating echo frames */
yueee_yt 0:7766f6712673 2041 lcp_echos_pending = 0;
yueee_yt 0:7766f6712673 2042 lcp_echo_number = 0;
yueee_yt 0:7766f6712673 2043 lcp_echo_timer_running = 0;
yueee_yt 0:7766f6712673 2044
yueee_yt 0:7766f6712673 2045 /* If a timeout interval is specified then start the timer */
yueee_yt 0:7766f6712673 2046 if (lcp_echo_interval != 0) {
yueee_yt 0:7766f6712673 2047 LcpEchoCheck (f);
yueee_yt 0:7766f6712673 2048 }
yueee_yt 0:7766f6712673 2049 }
yueee_yt 0:7766f6712673 2050
yueee_yt 0:7766f6712673 2051 /*
yueee_yt 0:7766f6712673 2052 * lcp_echo_lowerdown - Stop the timer for the LCP frame
yueee_yt 0:7766f6712673 2053 */
yueee_yt 0:7766f6712673 2054
yueee_yt 0:7766f6712673 2055 static void
yueee_yt 0:7766f6712673 2056 lcp_echo_lowerdown (int unit)
yueee_yt 0:7766f6712673 2057 {
yueee_yt 0:7766f6712673 2058 fsm *f = &lcp_fsm[unit];
yueee_yt 0:7766f6712673 2059
yueee_yt 0:7766f6712673 2060 if (lcp_echo_timer_running != 0) {
yueee_yt 0:7766f6712673 2061 UNTIMEOUT (LcpEchoTimeout, f);
yueee_yt 0:7766f6712673 2062 lcp_echo_timer_running = 0;
yueee_yt 0:7766f6712673 2063 }
yueee_yt 0:7766f6712673 2064 }
yueee_yt 0:7766f6712673 2065
yueee_yt 0:7766f6712673 2066 #endif /* PPP_SUPPORT */