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Dependencies:   mbed

NetServices/lwip/netif/ppp/lcp.c@1:f5ac63519541, 2014-03-05 (annotated)

Committer:
Michael J. Spencer
Date:
Wed Mar 05 06:14:02 2014 -0800
Revision:
1:f5ac63519541
Initial commit.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Michael J. Spencer 1:f5ac63519541 1 /*****************************************************************************
Michael J. Spencer 1:f5ac63519541 2 * lcp.c - Network Link Control Protocol program file.
Michael J. Spencer 1:f5ac63519541 3 *
Michael J. Spencer 1:f5ac63519541 4 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
Michael J. Spencer 1:f5ac63519541 5 * portions Copyright (c) 1997 by Global Election Systems Inc.
Michael J. Spencer 1:f5ac63519541 6 *
Michael J. Spencer 1:f5ac63519541 7 * The authors hereby grant permission to use, copy, modify, distribute,
Michael J. Spencer 1:f5ac63519541 8 * and license this software and its documentation for any purpose, provided
Michael J. Spencer 1:f5ac63519541 9 * that existing copyright notices are retained in all copies and that this
Michael J. Spencer 1:f5ac63519541 10 * notice and the following disclaimer are included verbatim in any
Michael J. Spencer 1:f5ac63519541 11 * distributions. No written agreement, license, or royalty fee is required
Michael J. Spencer 1:f5ac63519541 12 * for any of the authorized uses.
Michael J. Spencer 1:f5ac63519541 13 *
Michael J. Spencer 1:f5ac63519541 14 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
Michael J. Spencer 1:f5ac63519541 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
Michael J. Spencer 1:f5ac63519541 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
Michael J. Spencer 1:f5ac63519541 17 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
Michael J. Spencer 1:f5ac63519541 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
Michael J. Spencer 1:f5ac63519541 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
Michael J. Spencer 1:f5ac63519541 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
Michael J. Spencer 1:f5ac63519541 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
Michael J. Spencer 1:f5ac63519541 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
Michael J. Spencer 1:f5ac63519541 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Michael J. Spencer 1:f5ac63519541 24 *
Michael J. Spencer 1:f5ac63519541 25 ******************************************************************************
Michael J. Spencer 1:f5ac63519541 26 * REVISION HISTORY
Michael J. Spencer 1:f5ac63519541 27 *
Michael J. Spencer 1:f5ac63519541 28 * 03-01-01 Marc Boucher <marc@mbsi.ca>
Michael J. Spencer 1:f5ac63519541 29 * Ported to lwIP.
Michael J. Spencer 1:f5ac63519541 30 * 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
Michael J. Spencer 1:f5ac63519541 31 * Original.
Michael J. Spencer 1:f5ac63519541 32 *****************************************************************************/
Michael J. Spencer 1:f5ac63519541 33
Michael J. Spencer 1:f5ac63519541 34 /*
Michael J. Spencer 1:f5ac63519541 35 * lcp.c - PPP Link Control Protocol.
Michael J. Spencer 1:f5ac63519541 36 *
Michael J. Spencer 1:f5ac63519541 37 * Copyright (c) 1989 Carnegie Mellon University.
Michael J. Spencer 1:f5ac63519541 38 * All rights reserved.
Michael J. Spencer 1:f5ac63519541 39 *
Michael J. Spencer 1:f5ac63519541 40 * Redistribution and use in source and binary forms are permitted
Michael J. Spencer 1:f5ac63519541 41 * provided that the above copyright notice and this paragraph are
Michael J. Spencer 1:f5ac63519541 42 * duplicated in all such forms and that any documentation,
Michael J. Spencer 1:f5ac63519541 43 * advertising materials, and other materials related to such
Michael J. Spencer 1:f5ac63519541 44 * distribution and use acknowledge that the software was developed
Michael J. Spencer 1:f5ac63519541 45 * by Carnegie Mellon University. The name of the
Michael J. Spencer 1:f5ac63519541 46 * University may not be used to endorse or promote products derived
Michael J. Spencer 1:f5ac63519541 47 * from this software without specific prior written permission.
Michael J. Spencer 1:f5ac63519541 48 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
Michael J. Spencer 1:f5ac63519541 49 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
Michael J. Spencer 1:f5ac63519541 50 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
Michael J. Spencer 1:f5ac63519541 51 */
Michael J. Spencer 1:f5ac63519541 52
Michael J. Spencer 1:f5ac63519541 53
Michael J. Spencer 1:f5ac63519541 54 #include "lwip/opt.h"
Michael J. Spencer 1:f5ac63519541 55
Michael J. Spencer 1:f5ac63519541 56 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
Michael J. Spencer 1:f5ac63519541 57
Michael J. Spencer 1:f5ac63519541 58 #include "ppp.h"
Michael J. Spencer 1:f5ac63519541 59 #include "pppdebug.h"
Michael J. Spencer 1:f5ac63519541 60
Michael J. Spencer 1:f5ac63519541 61 #include "fsm.h"
Michael J. Spencer 1:f5ac63519541 62 #include "chap.h"
Michael J. Spencer 1:f5ac63519541 63 #include "magic.h"
Michael J. Spencer 1:f5ac63519541 64 #include "auth.h"
Michael J. Spencer 1:f5ac63519541 65 #include "lcp.h"
Michael J. Spencer 1:f5ac63519541 66
Michael J. Spencer 1:f5ac63519541 67 #include <string.h>
Michael J. Spencer 1:f5ac63519541 68
Michael J. Spencer 1:f5ac63519541 69 #if PPPOE_SUPPORT
Michael J. Spencer 1:f5ac63519541 70 #include "netif/ppp_oe.h"
Michael J. Spencer 1:f5ac63519541 71 #else
Michael J. Spencer 1:f5ac63519541 72 #define PPPOE_MAXMTU PPP_MAXMRU
Michael J. Spencer 1:f5ac63519541 73 #endif
Michael J. Spencer 1:f5ac63519541 74
Michael J. Spencer 1:f5ac63519541 75 #if 0 /* UNUSED */
Michael J. Spencer 1:f5ac63519541 76 /*
Michael J. Spencer 1:f5ac63519541 77 * LCP-related command-line options.
Michael J. Spencer 1:f5ac63519541 78 */
Michael J. Spencer 1:f5ac63519541 79 int lcp_echo_interval = 0; /* Interval between LCP echo-requests */
Michael J. Spencer 1:f5ac63519541 80 int lcp_echo_fails = 0; /* Tolerance to unanswered echo-requests */
Michael J. Spencer 1:f5ac63519541 81 bool lax_recv = 0; /* accept control chars in asyncmap */
Michael J. Spencer 1:f5ac63519541 82
Michael J. Spencer 1:f5ac63519541 83 static int setescape (char **);
Michael J. Spencer 1:f5ac63519541 84
Michael J. Spencer 1:f5ac63519541 85 static option_t lcp_option_list[] = {
Michael J. Spencer 1:f5ac63519541 86 /* LCP options */
Michael J. Spencer 1:f5ac63519541 87 /* list stripped for simplicity */
Michael J. Spencer 1:f5ac63519541 88 {NULL}
Michael J. Spencer 1:f5ac63519541 89 };
Michael J. Spencer 1:f5ac63519541 90 #endif /* UNUSED */
Michael J. Spencer 1:f5ac63519541 91
Michael J. Spencer 1:f5ac63519541 92 /* options */
Michael J. Spencer 1:f5ac63519541 93 LinkPhase lcp_phase[NUM_PPP]; /* Phase of link session (RFC 1661) */
Michael J. Spencer 1:f5ac63519541 94 static u_int lcp_echo_interval = LCP_ECHOINTERVAL; /* Interval between LCP echo-requests */
Michael J. Spencer 1:f5ac63519541 95 static u_int lcp_echo_fails = LCP_MAXECHOFAILS; /* Tolerance to unanswered echo-requests */
Michael J. Spencer 1:f5ac63519541 96
Michael J. Spencer 1:f5ac63519541 97 /* global vars */
Michael J. Spencer 1:f5ac63519541 98 static fsm lcp_fsm[NUM_PPP]; /* LCP fsm structure (global)*/
Michael J. Spencer 1:f5ac63519541 99 lcp_options lcp_wantoptions[NUM_PPP]; /* Options that we want to request */
Michael J. Spencer 1:f5ac63519541 100 lcp_options lcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
Michael J. Spencer 1:f5ac63519541 101 lcp_options lcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
Michael J. Spencer 1:f5ac63519541 102 lcp_options lcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
Michael J. Spencer 1:f5ac63519541 103 ext_accm xmit_accm[NUM_PPP]; /* extended transmit ACCM */
Michael J. Spencer 1:f5ac63519541 104
Michael J. Spencer 1:f5ac63519541 105 static u32_t lcp_echos_pending = 0; /* Number of outstanding echo msgs */
Michael J. Spencer 1:f5ac63519541 106 static u32_t lcp_echo_number = 0; /* ID number of next echo frame */
Michael J. Spencer 1:f5ac63519541 107 static u32_t lcp_echo_timer_running = 0; /* TRUE if a timer is running */
Michael J. Spencer 1:f5ac63519541 108
Michael J. Spencer 1:f5ac63519541 109 /* @todo: do we really need such a large buffer? The typical 1500 bytes seem too much. */
Michael J. Spencer 1:f5ac63519541 110 static u_char nak_buffer[PPP_MRU]; /* where we construct a nak packet */
Michael J. Spencer 1:f5ac63519541 111
Michael J. Spencer 1:f5ac63519541 112 /*
Michael J. Spencer 1:f5ac63519541 113 * Callbacks for fsm code. (CI = Configuration Information)
Michael J. Spencer 1:f5ac63519541 114 */
Michael J. Spencer 1:f5ac63519541 115 static void lcp_resetci (fsm*); /* Reset our CI */
Michael J. Spencer 1:f5ac63519541 116 static int lcp_cilen (fsm*); /* Return length of our CI */
Michael J. Spencer 1:f5ac63519541 117 static void lcp_addci (fsm*, u_char*, int*); /* Add our CI to pkt */
Michael J. Spencer 1:f5ac63519541 118 static int lcp_ackci (fsm*, u_char*, int); /* Peer ack'd our CI */
Michael J. Spencer 1:f5ac63519541 119 static int lcp_nakci (fsm*, u_char*, int); /* Peer nak'd our CI */
Michael J. Spencer 1:f5ac63519541 120 static int lcp_rejci (fsm*, u_char*, int); /* Peer rej'd our CI */
Michael J. Spencer 1:f5ac63519541 121 static int lcp_reqci (fsm*, u_char*, int*, int); /* Rcv peer CI */
Michael J. Spencer 1:f5ac63519541 122 static void lcp_up (fsm*); /* We're UP */
Michael J. Spencer 1:f5ac63519541 123 static void lcp_down (fsm*); /* We're DOWN */
Michael J. Spencer 1:f5ac63519541 124 static void lcp_starting (fsm*); /* We need lower layer up */
Michael J. Spencer 1:f5ac63519541 125 static void lcp_finished (fsm*); /* We need lower layer down */
Michael J. Spencer 1:f5ac63519541 126 static int lcp_extcode (fsm*, int, u_char, u_char*, int);
Michael J. Spencer 1:f5ac63519541 127 static void lcp_rprotrej (fsm*, u_char*, int);
Michael J. Spencer 1:f5ac63519541 128
Michael J. Spencer 1:f5ac63519541 129 /*
Michael J. Spencer 1:f5ac63519541 130 * routines to send LCP echos to peer
Michael J. Spencer 1:f5ac63519541 131 */
Michael J. Spencer 1:f5ac63519541 132
Michael J. Spencer 1:f5ac63519541 133 static void lcp_echo_lowerup (int);
Michael J. Spencer 1:f5ac63519541 134 static void lcp_echo_lowerdown (int);
Michael J. Spencer 1:f5ac63519541 135 static void LcpEchoTimeout (void*);
Michael J. Spencer 1:f5ac63519541 136 static void lcp_received_echo_reply (fsm*, int, u_char*, int);
Michael J. Spencer 1:f5ac63519541 137 static void LcpSendEchoRequest (fsm*);
Michael J. Spencer 1:f5ac63519541 138 static void LcpLinkFailure (fsm*);
Michael J. Spencer 1:f5ac63519541 139 static void LcpEchoCheck (fsm*);
Michael J. Spencer 1:f5ac63519541 140
Michael J. Spencer 1:f5ac63519541 141 static fsm_callbacks lcp_callbacks = { /* LCP callback routines */
Michael J. Spencer 1:f5ac63519541 142 lcp_resetci, /* Reset our Configuration Information */
Michael J. Spencer 1:f5ac63519541 143 lcp_cilen, /* Length of our Configuration Information */
Michael J. Spencer 1:f5ac63519541 144 lcp_addci, /* Add our Configuration Information */
Michael J. Spencer 1:f5ac63519541 145 lcp_ackci, /* ACK our Configuration Information */
Michael J. Spencer 1:f5ac63519541 146 lcp_nakci, /* NAK our Configuration Information */
Michael J. Spencer 1:f5ac63519541 147 lcp_rejci, /* Reject our Configuration Information */
Michael J. Spencer 1:f5ac63519541 148 lcp_reqci, /* Request peer's Configuration Information */
Michael J. Spencer 1:f5ac63519541 149 lcp_up, /* Called when fsm reaches LS_OPENED state */
Michael J. Spencer 1:f5ac63519541 150 lcp_down, /* Called when fsm leaves LS_OPENED state */
Michael J. Spencer 1:f5ac63519541 151 lcp_starting, /* Called when we want the lower layer up */
Michael J. Spencer 1:f5ac63519541 152 lcp_finished, /* Called when we want the lower layer down */
Michael J. Spencer 1:f5ac63519541 153 NULL, /* Called when Protocol-Reject received */
Michael J. Spencer 1:f5ac63519541 154 NULL, /* Retransmission is necessary */
Michael J. Spencer 1:f5ac63519541 155 lcp_extcode, /* Called to handle LCP-specific codes */
Michael J. Spencer 1:f5ac63519541 156 "LCP" /* String name of protocol */
Michael J. Spencer 1:f5ac63519541 157 };
Michael J. Spencer 1:f5ac63519541 158
Michael J. Spencer 1:f5ac63519541 159 /*
Michael J. Spencer 1:f5ac63519541 160 * Protocol entry points.
Michael J. Spencer 1:f5ac63519541 161 * Some of these are called directly.
Michael J. Spencer 1:f5ac63519541 162 */
Michael J. Spencer 1:f5ac63519541 163
Michael J. Spencer 1:f5ac63519541 164 static void lcp_input (int, u_char *, int);
Michael J. Spencer 1:f5ac63519541 165 static void lcp_protrej (int);
Michael J. Spencer 1:f5ac63519541 166
Michael J. Spencer 1:f5ac63519541 167 struct protent lcp_protent = {
Michael J. Spencer 1:f5ac63519541 168 PPP_LCP,
Michael J. Spencer 1:f5ac63519541 169 lcp_init,
Michael J. Spencer 1:f5ac63519541 170 lcp_input,
Michael J. Spencer 1:f5ac63519541 171 lcp_protrej,
Michael J. Spencer 1:f5ac63519541 172 lcp_lowerup,
Michael J. Spencer 1:f5ac63519541 173 lcp_lowerdown,
Michael J. Spencer 1:f5ac63519541 174 lcp_open,
Michael J. Spencer 1:f5ac63519541 175 lcp_close,
Michael J. Spencer 1:f5ac63519541 176 #if PPP_ADDITIONAL_CALLBACKS
Michael J. Spencer 1:f5ac63519541 177 lcp_printpkt,
Michael J. Spencer 1:f5ac63519541 178 NULL,
Michael J. Spencer 1:f5ac63519541 179 #endif /* PPP_ADDITIONAL_CALLBACKS */
Michael J. Spencer 1:f5ac63519541 180 1,
Michael J. Spencer 1:f5ac63519541 181 "LCP",
Michael J. Spencer 1:f5ac63519541 182 #if PPP_ADDITIONAL_CALLBACKS
Michael J. Spencer 1:f5ac63519541 183 NULL,
Michael J. Spencer 1:f5ac63519541 184 NULL,
Michael J. Spencer 1:f5ac63519541 185 NULL
Michael J. Spencer 1:f5ac63519541 186 #endif /* PPP_ADDITIONAL_CALLBACKS */
Michael J. Spencer 1:f5ac63519541 187 };
Michael J. Spencer 1:f5ac63519541 188
Michael J. Spencer 1:f5ac63519541 189 int lcp_loopbackfail = DEFLOOPBACKFAIL;
Michael J. Spencer 1:f5ac63519541 190
Michael J. Spencer 1:f5ac63519541 191 /*
Michael J. Spencer 1:f5ac63519541 192 * Length of each type of configuration option (in octets)
Michael J. Spencer 1:f5ac63519541 193 */
Michael J. Spencer 1:f5ac63519541 194 #define CILEN_VOID 2
Michael J. Spencer 1:f5ac63519541 195 #define CILEN_CHAR 3
Michael J. Spencer 1:f5ac63519541 196 #define CILEN_SHORT 4 /* CILEN_VOID + sizeof(short) */
Michael J. Spencer 1:f5ac63519541 197 #define CILEN_CHAP 5 /* CILEN_VOID + sizeof(short) + 1 */
Michael J. Spencer 1:f5ac63519541 198 #define CILEN_LONG 6 /* CILEN_VOID + sizeof(long) */
Michael J. Spencer 1:f5ac63519541 199 #define CILEN_LQR 8 /* CILEN_VOID + sizeof(short) + sizeof(long) */
Michael J. Spencer 1:f5ac63519541 200 #define CILEN_CBCP 3
Michael J. Spencer 1:f5ac63519541 201
Michael J. Spencer 1:f5ac63519541 202 #define CODENAME(x) ((x) == CONFACK ? "ACK" : (x) == CONFNAK ? "NAK" : "REJ")
Michael J. Spencer 1:f5ac63519541 203
Michael J. Spencer 1:f5ac63519541 204 #if 0 /* UNUSED */
Michael J. Spencer 1:f5ac63519541 205 /*
Michael J. Spencer 1:f5ac63519541 206 * setescape - add chars to the set we escape on transmission.
Michael J. Spencer 1:f5ac63519541 207 */
Michael J. Spencer 1:f5ac63519541 208 static int
Michael J. Spencer 1:f5ac63519541 209 setescape(argv)
Michael J. Spencer 1:f5ac63519541 210 char **argv;
Michael J. Spencer 1:f5ac63519541 211 {
Michael J. Spencer 1:f5ac63519541 212 int n, ret;
Michael J. Spencer 1:f5ac63519541 213 char *p, *endp;
Michael J. Spencer 1:f5ac63519541 214
Michael J. Spencer 1:f5ac63519541 215 p = *argv;
Michael J. Spencer 1:f5ac63519541 216 ret = 1;
Michael J. Spencer 1:f5ac63519541 217 while (*p) {
Michael J. Spencer 1:f5ac63519541 218 n = strtol(p, &endp, 16);
Michael J. Spencer 1:f5ac63519541 219 if (p == endp) {
Michael J. Spencer 1:f5ac63519541 220 option_error("escape parameter contains invalid hex number '%s'", p);
Michael J. Spencer 1:f5ac63519541 221 return 0;
Michael J. Spencer 1:f5ac63519541 222 }
Michael J. Spencer 1:f5ac63519541 223 p = endp;
Michael J. Spencer 1:f5ac63519541 224 if (n < 0 || n == 0x5E || n > 0xFF) {
Michael J. Spencer 1:f5ac63519541 225 option_error("can't escape character 0x%x", n);
Michael J. Spencer 1:f5ac63519541 226 ret = 0;
Michael J. Spencer 1:f5ac63519541 227 } else
Michael J. Spencer 1:f5ac63519541 228 xmit_accm[0][n >> 5] |= 1 << (n & 0x1F);
Michael J. Spencer 1:f5ac63519541 229 while (*p == ',' || *p == ' ')
Michael J. Spencer 1:f5ac63519541 230 ++p;
Michael J. Spencer 1:f5ac63519541 231 }
Michael J. Spencer 1:f5ac63519541 232 return ret;
Michael J. Spencer 1:f5ac63519541 233 }
Michael J. Spencer 1:f5ac63519541 234 #endif /* UNUSED */
Michael J. Spencer 1:f5ac63519541 235
Michael J. Spencer 1:f5ac63519541 236 /*
Michael J. Spencer 1:f5ac63519541 237 * lcp_init - Initialize LCP.
Michael J. Spencer 1:f5ac63519541 238 */
Michael J. Spencer 1:f5ac63519541 239 void
Michael J. Spencer 1:f5ac63519541 240 lcp_init(int unit)
Michael J. Spencer 1:f5ac63519541 241 {
Michael J. Spencer 1:f5ac63519541 242 fsm *f = &lcp_fsm[unit];
Michael J. Spencer 1:f5ac63519541 243 lcp_options *wo = &lcp_wantoptions[unit];
Michael J. Spencer 1:f5ac63519541 244 lcp_options *ao = &lcp_allowoptions[unit];
Michael J. Spencer 1:f5ac63519541 245
Michael J. Spencer 1:f5ac63519541 246 f->unit = unit;
Michael J. Spencer 1:f5ac63519541 247 f->protocol = PPP_LCP;
Michael J. Spencer 1:f5ac63519541 248 f->callbacks = &lcp_callbacks;
Michael J. Spencer 1:f5ac63519541 249
Michael J. Spencer 1:f5ac63519541 250 fsm_init(f);
Michael J. Spencer 1:f5ac63519541 251
Michael J. Spencer 1:f5ac63519541 252 wo->passive = 0;
Michael J. Spencer 1:f5ac63519541 253 wo->silent = 0;
Michael J. Spencer 1:f5ac63519541 254 wo->restart = 0; /* Set to 1 in kernels or multi-line implementations */
Michael J. Spencer 1:f5ac63519541 255 wo->neg_mru = 1;
Michael J. Spencer 1:f5ac63519541 256 wo->mru = PPP_DEFMRU;
Michael J. Spencer 1:f5ac63519541 257 wo->neg_asyncmap = 1;
Michael J. Spencer 1:f5ac63519541 258 wo->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
Michael J. Spencer 1:f5ac63519541 259 wo->neg_chap = 0; /* Set to 1 on server */
Michael J. Spencer 1:f5ac63519541 260 wo->neg_upap = 0; /* Set to 1 on server */
Michael J. Spencer 1:f5ac63519541 261 wo->chap_mdtype = CHAP_DIGEST_MD5;
Michael J. Spencer 1:f5ac63519541 262 wo->neg_magicnumber = 1;
Michael J. Spencer 1:f5ac63519541 263 wo->neg_pcompression = 1;
Michael J. Spencer 1:f5ac63519541 264 wo->neg_accompression = 1;
Michael J. Spencer 1:f5ac63519541 265 wo->neg_lqr = 0; /* no LQR implementation yet */
Michael J. Spencer 1:f5ac63519541 266 wo->neg_cbcp = 0;
Michael J. Spencer 1:f5ac63519541 267
Michael J. Spencer 1:f5ac63519541 268 ao->neg_mru = 1;
Michael J. Spencer 1:f5ac63519541 269 ao->mru = PPP_MAXMRU;
Michael J. Spencer 1:f5ac63519541 270 ao->neg_asyncmap = 1;
Michael J. Spencer 1:f5ac63519541 271 ao->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
Michael J. Spencer 1:f5ac63519541 272 ao->neg_chap = (CHAP_SUPPORT != 0);
Michael J. Spencer 1:f5ac63519541 273 ao->chap_mdtype = CHAP_DIGEST_MD5;
Michael J. Spencer 1:f5ac63519541 274 ao->neg_upap = (PAP_SUPPORT != 0);
Michael J. Spencer 1:f5ac63519541 275 ao->neg_magicnumber = 1;
Michael J. Spencer 1:f5ac63519541 276 ao->neg_pcompression = 1;
Michael J. Spencer 1:f5ac63519541 277 ao->neg_accompression = 1;
Michael J. Spencer 1:f5ac63519541 278 ao->neg_lqr = 0; /* no LQR implementation yet */
Michael J. Spencer 1:f5ac63519541 279 ao->neg_cbcp = (CBCP_SUPPORT != 0);
Michael J. Spencer 1:f5ac63519541 280
Michael J. Spencer 1:f5ac63519541 281 /*
Michael J. Spencer 1:f5ac63519541 282 * Set transmit escape for the flag and escape characters plus anything
Michael J. Spencer 1:f5ac63519541 283 * set for the allowable options.
Michael J. Spencer 1:f5ac63519541 284 */
Michael J. Spencer 1:f5ac63519541 285 memset(xmit_accm[unit], 0, sizeof(xmit_accm[0]));
Michael J. Spencer 1:f5ac63519541 286 xmit_accm[unit][15] = 0x60;
Michael J. Spencer 1:f5ac63519541 287 xmit_accm[unit][0] = (u_char)((ao->asyncmap & 0xFF));
Michael J. Spencer 1:f5ac63519541 288 xmit_accm[unit][1] = (u_char)((ao->asyncmap >> 8) & 0xFF);
Michael J. Spencer 1:f5ac63519541 289 xmit_accm[unit][2] = (u_char)((ao->asyncmap >> 16) & 0xFF);
Michael J. Spencer 1:f5ac63519541 290 xmit_accm[unit][3] = (u_char)((ao->asyncmap >> 24) & 0xFF);
Michael J. Spencer 1:f5ac63519541 291 LCPDEBUG(LOG_INFO, ("lcp_init: xmit_accm=%X %X %X %X\n",
Michael J. Spencer 1:f5ac63519541 292 xmit_accm[unit][0],
Michael J. Spencer 1:f5ac63519541 293 xmit_accm[unit][1],
Michael J. Spencer 1:f5ac63519541 294 xmit_accm[unit][2],
Michael J. Spencer 1:f5ac63519541 295 xmit_accm[unit][3]));
Michael J. Spencer 1:f5ac63519541 296
Michael J. Spencer 1:f5ac63519541 297 lcp_phase[unit] = PHASE_INITIALIZE;
Michael J. Spencer 1:f5ac63519541 298 }
Michael J. Spencer 1:f5ac63519541 299
Michael J. Spencer 1:f5ac63519541 300
Michael J. Spencer 1:f5ac63519541 301 /*
Michael J. Spencer 1:f5ac63519541 302 * lcp_open - LCP is allowed to come up.
Michael J. Spencer 1:f5ac63519541 303 */
Michael J. Spencer 1:f5ac63519541 304 void
Michael J. Spencer 1:f5ac63519541 305 lcp_open(int unit)
Michael J. Spencer 1:f5ac63519541 306 {
Michael J. Spencer 1:f5ac63519541 307 fsm *f = &lcp_fsm[unit];
Michael J. Spencer 1:f5ac63519541 308 lcp_options *wo = &lcp_wantoptions[unit];
Michael J. Spencer 1:f5ac63519541 309
Michael J. Spencer 1:f5ac63519541 310 f->flags = 0;
Michael J. Spencer 1:f5ac63519541 311 if (wo->passive) {
Michael J. Spencer 1:f5ac63519541 312 f->flags |= OPT_PASSIVE;
Michael J. Spencer 1:f5ac63519541 313 }
Michael J. Spencer 1:f5ac63519541 314 if (wo->silent) {
Michael J. Spencer 1:f5ac63519541 315 f->flags |= OPT_SILENT;
Michael J. Spencer 1:f5ac63519541 316 }
Michael J. Spencer 1:f5ac63519541 317 fsm_open(f);
Michael J. Spencer 1:f5ac63519541 318
Michael J. Spencer 1:f5ac63519541 319 lcp_phase[unit] = PHASE_ESTABLISH;
Michael J. Spencer 1:f5ac63519541 320 }
Michael J. Spencer 1:f5ac63519541 321
Michael J. Spencer 1:f5ac63519541 322
Michael J. Spencer 1:f5ac63519541 323 /*
Michael J. Spencer 1:f5ac63519541 324 * lcp_close - Take LCP down.
Michael J. Spencer 1:f5ac63519541 325 */
Michael J. Spencer 1:f5ac63519541 326 void
Michael J. Spencer 1:f5ac63519541 327 lcp_close(int unit, char *reason)
Michael J. Spencer 1:f5ac63519541 328 {
Michael J. Spencer 1:f5ac63519541 329 fsm *f = &lcp_fsm[unit];
Michael J. Spencer 1:f5ac63519541 330
Michael J. Spencer 1:f5ac63519541 331 if (lcp_phase[unit] != PHASE_DEAD) {
Michael J. Spencer 1:f5ac63519541 332 lcp_phase[unit] = PHASE_TERMINATE;
Michael J. Spencer 1:f5ac63519541 333 }
Michael J. Spencer 1:f5ac63519541 334 if (f->state == LS_STOPPED && f->flags & (OPT_PASSIVE|OPT_SILENT)) {
Michael J. Spencer 1:f5ac63519541 335 /*
Michael J. Spencer 1:f5ac63519541 336 * This action is not strictly according to the FSM in RFC1548,
Michael J. Spencer 1:f5ac63519541 337 * but it does mean that the program terminates if you do an
Michael J. Spencer 1:f5ac63519541 338 * lcp_close() in passive/silent mode when a connection hasn't
Michael J. Spencer 1:f5ac63519541 339 * been established.
Michael J. Spencer 1:f5ac63519541 340 */
Michael J. Spencer 1:f5ac63519541 341 f->state = LS_CLOSED;
Michael J. Spencer 1:f5ac63519541 342 lcp_finished(f);
Michael J. Spencer 1:f5ac63519541 343 } else {
Michael J. Spencer 1:f5ac63519541 344 fsm_close(f, reason);
Michael J. Spencer 1:f5ac63519541 345 }
Michael J. Spencer 1:f5ac63519541 346 }
Michael J. Spencer 1:f5ac63519541 347
Michael J. Spencer 1:f5ac63519541 348
Michael J. Spencer 1:f5ac63519541 349 /*
Michael J. Spencer 1:f5ac63519541 350 * lcp_lowerup - The lower layer is up.
Michael J. Spencer 1:f5ac63519541 351 */
Michael J. Spencer 1:f5ac63519541 352 void
Michael J. Spencer 1:f5ac63519541 353 lcp_lowerup(int unit)
Michael J. Spencer 1:f5ac63519541 354 {
Michael J. Spencer 1:f5ac63519541 355 lcp_options *wo = &lcp_wantoptions[unit];
Michael J. Spencer 1:f5ac63519541 356
Michael J. Spencer 1:f5ac63519541 357 /*
Michael J. Spencer 1:f5ac63519541 358 * Don't use A/C or protocol compression on transmission,
Michael J. Spencer 1:f5ac63519541 359 * but accept A/C and protocol compressed packets
Michael J. Spencer 1:f5ac63519541 360 * if we are going to ask for A/C and protocol compression.
Michael J. Spencer 1:f5ac63519541 361 */
Michael J. Spencer 1:f5ac63519541 362 ppp_set_xaccm(unit, &xmit_accm[unit]);
Michael J. Spencer 1:f5ac63519541 363 ppp_send_config(unit, PPP_MRU, 0xffffffffl, 0, 0);
Michael J. Spencer 1:f5ac63519541 364 ppp_recv_config(unit, PPP_MRU, 0x00000000l,
Michael J. Spencer 1:f5ac63519541 365 wo->neg_pcompression, wo->neg_accompression);
Michael J. Spencer 1:f5ac63519541 366 peer_mru[unit] = PPP_MRU;
Michael J. Spencer 1:f5ac63519541 367 lcp_allowoptions[unit].asyncmap = (u_long)xmit_accm[unit][0]
Michael J. Spencer 1:f5ac63519541 368 | ((u_long)xmit_accm[unit][1] << 8)
Michael J. Spencer 1:f5ac63519541 369 | ((u_long)xmit_accm[unit][2] << 16)
Michael J. Spencer 1:f5ac63519541 370 | ((u_long)xmit_accm[unit][3] << 24);
Michael J. Spencer 1:f5ac63519541 371 LCPDEBUG(LOG_INFO, ("lcp_lowerup: asyncmap=%X %X %X %X\n",
Michael J. Spencer 1:f5ac63519541 372 xmit_accm[unit][3],
Michael J. Spencer 1:f5ac63519541 373 xmit_accm[unit][2],
Michael J. Spencer 1:f5ac63519541 374 xmit_accm[unit][1],
Michael J. Spencer 1:f5ac63519541 375 xmit_accm[unit][0]));
Michael J. Spencer 1:f5ac63519541 376
Michael J. Spencer 1:f5ac63519541 377 fsm_lowerup(&lcp_fsm[unit]);
Michael J. Spencer 1:f5ac63519541 378 }
Michael J. Spencer 1:f5ac63519541 379
Michael J. Spencer 1:f5ac63519541 380
Michael J. Spencer 1:f5ac63519541 381 /*
Michael J. Spencer 1:f5ac63519541 382 * lcp_lowerdown - The lower layer is down.
Michael J. Spencer 1:f5ac63519541 383 */
Michael J. Spencer 1:f5ac63519541 384 void
Michael J. Spencer 1:f5ac63519541 385 lcp_lowerdown(int unit)
Michael J. Spencer 1:f5ac63519541 386 {
Michael J. Spencer 1:f5ac63519541 387 fsm_lowerdown(&lcp_fsm[unit]);
Michael J. Spencer 1:f5ac63519541 388 }
Michael J. Spencer 1:f5ac63519541 389
Michael J. Spencer 1:f5ac63519541 390
Michael J. Spencer 1:f5ac63519541 391 /*
Michael J. Spencer 1:f5ac63519541 392 * lcp_input - Input LCP packet.
Michael J. Spencer 1:f5ac63519541 393 */
Michael J. Spencer 1:f5ac63519541 394 static void
Michael J. Spencer 1:f5ac63519541 395 lcp_input(int unit, u_char *p, int len)
Michael J. Spencer 1:f5ac63519541 396 {
Michael J. Spencer 1:f5ac63519541 397 fsm *f = &lcp_fsm[unit];
Michael J. Spencer 1:f5ac63519541 398
Michael J. Spencer 1:f5ac63519541 399 fsm_input(f, p, len);
Michael J. Spencer 1:f5ac63519541 400 }
Michael J. Spencer 1:f5ac63519541 401
Michael J. Spencer 1:f5ac63519541 402
Michael J. Spencer 1:f5ac63519541 403 /*
Michael J. Spencer 1:f5ac63519541 404 * lcp_extcode - Handle a LCP-specific code.
Michael J. Spencer 1:f5ac63519541 405 */
Michael J. Spencer 1:f5ac63519541 406 static int
Michael J. Spencer 1:f5ac63519541 407 lcp_extcode(fsm *f, int code, u_char id, u_char *inp, int len)
Michael J. Spencer 1:f5ac63519541 408 {
Michael J. Spencer 1:f5ac63519541 409 u_char *magp;
Michael J. Spencer 1:f5ac63519541 410
Michael J. Spencer 1:f5ac63519541 411 switch( code ){
Michael J. Spencer 1:f5ac63519541 412 case PROTREJ:
Michael J. Spencer 1:f5ac63519541 413 lcp_rprotrej(f, inp, len);
Michael J. Spencer 1:f5ac63519541 414 break;
Michael J. Spencer 1:f5ac63519541 415
Michael J. Spencer 1:f5ac63519541 416 case ECHOREQ:
Michael J. Spencer 1:f5ac63519541 417 if (f->state != LS_OPENED) {
Michael J. Spencer 1:f5ac63519541 418 break;
Michael J. Spencer 1:f5ac63519541 419 }
Michael J. Spencer 1:f5ac63519541 420 LCPDEBUG(LOG_INFO, ("lcp: Echo-Request, Rcvd id %d\n", id));
Michael J. Spencer 1:f5ac63519541 421 magp = inp;
Michael J. Spencer 1:f5ac63519541 422 PUTLONG(lcp_gotoptions[f->unit].magicnumber, magp);
Michael J. Spencer 1:f5ac63519541 423 fsm_sdata(f, ECHOREP, id, inp, len);
Michael J. Spencer 1:f5ac63519541 424 break;
Michael J. Spencer 1:f5ac63519541 425
Michael J. Spencer 1:f5ac63519541 426 case ECHOREP:
Michael J. Spencer 1:f5ac63519541 427 lcp_received_echo_reply(f, id, inp, len);
Michael J. Spencer 1:f5ac63519541 428 break;
Michael J. Spencer 1:f5ac63519541 429
Michael J. Spencer 1:f5ac63519541 430 case DISCREQ:
Michael J. Spencer 1:f5ac63519541 431 break;
Michael J. Spencer 1:f5ac63519541 432
Michael J. Spencer 1:f5ac63519541 433 default:
Michael J. Spencer 1:f5ac63519541 434 return 0;
Michael J. Spencer 1:f5ac63519541 435 }
Michael J. Spencer 1:f5ac63519541 436 return 1;
Michael J. Spencer 1:f5ac63519541 437 }
Michael J. Spencer 1:f5ac63519541 438
Michael J. Spencer 1:f5ac63519541 439
Michael J. Spencer 1:f5ac63519541 440 /*
Michael J. Spencer 1:f5ac63519541 441 * lcp_rprotrej - Receive an Protocol-Reject.
Michael J. Spencer 1:f5ac63519541 442 *
Michael J. Spencer 1:f5ac63519541 443 * Figure out which protocol is rejected and inform it.
Michael J. Spencer 1:f5ac63519541 444 */
Michael J. Spencer 1:f5ac63519541 445 static void
Michael J. Spencer 1:f5ac63519541 446 lcp_rprotrej(fsm *f, u_char *inp, int len)
Michael J. Spencer 1:f5ac63519541 447 {
Michael J. Spencer 1:f5ac63519541 448 int i;
Michael J. Spencer 1:f5ac63519541 449 struct protent *protp;
Michael J. Spencer 1:f5ac63519541 450 u_short prot;
Michael J. Spencer 1:f5ac63519541 451
Michael J. Spencer 1:f5ac63519541 452 if (len < (int)sizeof (u_short)) {
Michael J. Spencer 1:f5ac63519541 453 LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd short Protocol-Reject packet!\n"));
Michael J. Spencer 1:f5ac63519541 454 return;
Michael J. Spencer 1:f5ac63519541 455 }
Michael J. Spencer 1:f5ac63519541 456
Michael J. Spencer 1:f5ac63519541 457 GETSHORT(prot, inp);
Michael J. Spencer 1:f5ac63519541 458
Michael J. Spencer 1:f5ac63519541 459 LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd Protocol-Reject packet for %x!\n", prot));
Michael J. Spencer 1:f5ac63519541 460
Michael J. Spencer 1:f5ac63519541 461 /*
Michael J. Spencer 1:f5ac63519541 462 * Protocol-Reject packets received in any state other than the LCP
Michael J. Spencer 1:f5ac63519541 463 * LS_OPENED state SHOULD be silently discarded.
Michael J. Spencer 1:f5ac63519541 464 */
Michael J. Spencer 1:f5ac63519541 465 if( f->state != LS_OPENED ) {
Michael J. Spencer 1:f5ac63519541 466 LCPDEBUG(LOG_INFO, ("Protocol-Reject discarded: LCP in state %d\n", f->state));
Michael J. Spencer 1:f5ac63519541 467 return;
Michael J. Spencer 1:f5ac63519541 468 }
Michael J. Spencer 1:f5ac63519541 469
Michael J. Spencer 1:f5ac63519541 470 /*
Michael J. Spencer 1:f5ac63519541 471 * Upcall the proper Protocol-Reject routine.
Michael J. Spencer 1:f5ac63519541 472 */
Michael J. Spencer 1:f5ac63519541 473 for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
Michael J. Spencer 1:f5ac63519541 474 if (protp->protocol == prot && protp->enabled_flag) {
Michael J. Spencer 1:f5ac63519541 475 (*protp->protrej)(f->unit);
Michael J. Spencer 1:f5ac63519541 476 return;
Michael J. Spencer 1:f5ac63519541 477 }
Michael J. Spencer 1:f5ac63519541 478 }
Michael J. Spencer 1:f5ac63519541 479
Michael J. Spencer 1:f5ac63519541 480 LCPDEBUG(LOG_WARNING, ("Protocol-Reject for unsupported protocol 0x%x\n", prot));
Michael J. Spencer 1:f5ac63519541 481 }
Michael J. Spencer 1:f5ac63519541 482
Michael J. Spencer 1:f5ac63519541 483
Michael J. Spencer 1:f5ac63519541 484 /*
Michael J. Spencer 1:f5ac63519541 485 * lcp_protrej - A Protocol-Reject was received.
Michael J. Spencer 1:f5ac63519541 486 */
Michael J. Spencer 1:f5ac63519541 487 static void
Michael J. Spencer 1:f5ac63519541 488 lcp_protrej(int unit)
Michael J. Spencer 1:f5ac63519541 489 {
Michael J. Spencer 1:f5ac63519541 490 LWIP_UNUSED_ARG(unit);
Michael J. Spencer 1:f5ac63519541 491 /*
Michael J. Spencer 1:f5ac63519541 492 * Can't reject LCP!
Michael J. Spencer 1:f5ac63519541 493 */
Michael J. Spencer 1:f5ac63519541 494 LCPDEBUG(LOG_WARNING, ("lcp_protrej: Received Protocol-Reject for LCP!\n"));
Michael J. Spencer 1:f5ac63519541 495 fsm_protreject(&lcp_fsm[unit]);
Michael J. Spencer 1:f5ac63519541 496 }
Michael J. Spencer 1:f5ac63519541 497
Michael J. Spencer 1:f5ac63519541 498
Michael J. Spencer 1:f5ac63519541 499 /*
Michael J. Spencer 1:f5ac63519541 500 * lcp_sprotrej - Send a Protocol-Reject for some protocol.
Michael J. Spencer 1:f5ac63519541 501 */
Michael J. Spencer 1:f5ac63519541 502 void
Michael J. Spencer 1:f5ac63519541 503 lcp_sprotrej(int unit, u_char *p, int len)
Michael J. Spencer 1:f5ac63519541 504 {
Michael J. Spencer 1:f5ac63519541 505 /*
Michael J. Spencer 1:f5ac63519541 506 * Send back the protocol and the information field of the
Michael J. Spencer 1:f5ac63519541 507 * rejected packet. We only get here if LCP is in the LS_OPENED state.
Michael J. Spencer 1:f5ac63519541 508 */
Michael J. Spencer 1:f5ac63519541 509
Michael J. Spencer 1:f5ac63519541 510 fsm_sdata(&lcp_fsm[unit], PROTREJ, ++lcp_fsm[unit].id, p, len);
Michael J. Spencer 1:f5ac63519541 511 }
Michael J. Spencer 1:f5ac63519541 512
Michael J. Spencer 1:f5ac63519541 513
Michael J. Spencer 1:f5ac63519541 514 /*
Michael J. Spencer 1:f5ac63519541 515 * lcp_resetci - Reset our CI.
Michael J. Spencer 1:f5ac63519541 516 */
Michael J. Spencer 1:f5ac63519541 517 static void
Michael J. Spencer 1:f5ac63519541 518 lcp_resetci(fsm *f)
Michael J. Spencer 1:f5ac63519541 519 {
Michael J. Spencer 1:f5ac63519541 520 lcp_wantoptions[f->unit].magicnumber = magic();
Michael J. Spencer 1:f5ac63519541 521 lcp_wantoptions[f->unit].numloops = 0;
Michael J. Spencer 1:f5ac63519541 522 lcp_gotoptions[f->unit] = lcp_wantoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 523 peer_mru[f->unit] = PPP_MRU;
Michael J. Spencer 1:f5ac63519541 524 auth_reset(f->unit);
Michael J. Spencer 1:f5ac63519541 525 }
Michael J. Spencer 1:f5ac63519541 526
Michael J. Spencer 1:f5ac63519541 527
Michael J. Spencer 1:f5ac63519541 528 /*
Michael J. Spencer 1:f5ac63519541 529 * lcp_cilen - Return length of our CI.
Michael J. Spencer 1:f5ac63519541 530 */
Michael J. Spencer 1:f5ac63519541 531 static int
Michael J. Spencer 1:f5ac63519541 532 lcp_cilen(fsm *f)
Michael J. Spencer 1:f5ac63519541 533 {
Michael J. Spencer 1:f5ac63519541 534 lcp_options *go = &lcp_gotoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 535
Michael J. Spencer 1:f5ac63519541 536 #define LENCIVOID(neg) ((neg) ? CILEN_VOID : 0)
Michael J. Spencer 1:f5ac63519541 537 #define LENCICHAP(neg) ((neg) ? CILEN_CHAP : 0)
Michael J. Spencer 1:f5ac63519541 538 #define LENCISHORT(neg) ((neg) ? CILEN_SHORT : 0)
Michael J. Spencer 1:f5ac63519541 539 #define LENCILONG(neg) ((neg) ? CILEN_LONG : 0)
Michael J. Spencer 1:f5ac63519541 540 #define LENCILQR(neg) ((neg) ? CILEN_LQR: 0)
Michael J. Spencer 1:f5ac63519541 541 #define LENCICBCP(neg) ((neg) ? CILEN_CBCP: 0)
Michael J. Spencer 1:f5ac63519541 542 /*
Michael J. Spencer 1:f5ac63519541 543 * NB: we only ask for one of CHAP and UPAP, even if we will
Michael J. Spencer 1:f5ac63519541 544 * accept either.
Michael J. Spencer 1:f5ac63519541 545 */
Michael J. Spencer 1:f5ac63519541 546 return (LENCISHORT(go->neg_mru && go->mru != PPP_DEFMRU) +
Michael J. Spencer 1:f5ac63519541 547 LENCILONG(go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) +
Michael J. Spencer 1:f5ac63519541 548 LENCICHAP(go->neg_chap) +
Michael J. Spencer 1:f5ac63519541 549 LENCISHORT(!go->neg_chap && go->neg_upap) +
Michael J. Spencer 1:f5ac63519541 550 LENCILQR(go->neg_lqr) +
Michael J. Spencer 1:f5ac63519541 551 LENCICBCP(go->neg_cbcp) +
Michael J. Spencer 1:f5ac63519541 552 LENCILONG(go->neg_magicnumber) +
Michael J. Spencer 1:f5ac63519541 553 LENCIVOID(go->neg_pcompression) +
Michael J. Spencer 1:f5ac63519541 554 LENCIVOID(go->neg_accompression));
Michael J. Spencer 1:f5ac63519541 555 }
Michael J. Spencer 1:f5ac63519541 556
Michael J. Spencer 1:f5ac63519541 557
Michael J. Spencer 1:f5ac63519541 558 /*
Michael J. Spencer 1:f5ac63519541 559 * lcp_addci - Add our desired CIs to a packet.
Michael J. Spencer 1:f5ac63519541 560 */
Michael J. Spencer 1:f5ac63519541 561 static void
Michael J. Spencer 1:f5ac63519541 562 lcp_addci(fsm *f, u_char *ucp, int *lenp)
Michael J. Spencer 1:f5ac63519541 563 {
Michael J. Spencer 1:f5ac63519541 564 lcp_options *go = &lcp_gotoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 565 u_char *start_ucp = ucp;
Michael J. Spencer 1:f5ac63519541 566
Michael J. Spencer 1:f5ac63519541 567 #define ADDCIVOID(opt, neg) \
Michael J. Spencer 1:f5ac63519541 568 if (neg) { \
Michael J. Spencer 1:f5ac63519541 569 LCPDEBUG(LOG_INFO, ("lcp_addci: opt=%d\n", opt)); \
Michael J. Spencer 1:f5ac63519541 570 PUTCHAR(opt, ucp); \
Michael J. Spencer 1:f5ac63519541 571 PUTCHAR(CILEN_VOID, ucp); \
Michael J. Spencer 1:f5ac63519541 572 }
Michael J. Spencer 1:f5ac63519541 573 #define ADDCISHORT(opt, neg, val) \
Michael J. Spencer 1:f5ac63519541 574 if (neg) { \
Michael J. Spencer 1:f5ac63519541 575 LCPDEBUG(LOG_INFO, ("lcp_addci: INT opt=%d %X\n", opt, val)); \
Michael J. Spencer 1:f5ac63519541 576 PUTCHAR(opt, ucp); \
Michael J. Spencer 1:f5ac63519541 577 PUTCHAR(CILEN_SHORT, ucp); \
Michael J. Spencer 1:f5ac63519541 578 PUTSHORT(val, ucp); \
Michael J. Spencer 1:f5ac63519541 579 }
Michael J. Spencer 1:f5ac63519541 580 #define ADDCICHAP(opt, neg, val, digest) \
Michael J. Spencer 1:f5ac63519541 581 if (neg) { \
Michael J. Spencer 1:f5ac63519541 582 LCPDEBUG(LOG_INFO, ("lcp_addci: CHAP opt=%d %X\n", opt, val)); \
Michael J. Spencer 1:f5ac63519541 583 PUTCHAR(opt, ucp); \
Michael J. Spencer 1:f5ac63519541 584 PUTCHAR(CILEN_CHAP, ucp); \
Michael J. Spencer 1:f5ac63519541 585 PUTSHORT(val, ucp); \
Michael J. Spencer 1:f5ac63519541 586 PUTCHAR(digest, ucp); \
Michael J. Spencer 1:f5ac63519541 587 }
Michael J. Spencer 1:f5ac63519541 588 #define ADDCILONG(opt, neg, val) \
Michael J. Spencer 1:f5ac63519541 589 if (neg) { \
Michael J. Spencer 1:f5ac63519541 590 LCPDEBUG(LOG_INFO, ("lcp_addci: L opt=%d %lX\n", opt, val)); \
Michael J. Spencer 1:f5ac63519541 591 PUTCHAR(opt, ucp); \
Michael J. Spencer 1:f5ac63519541 592 PUTCHAR(CILEN_LONG, ucp); \
Michael J. Spencer 1:f5ac63519541 593 PUTLONG(val, ucp); \
Michael J. Spencer 1:f5ac63519541 594 }
Michael J. Spencer 1:f5ac63519541 595 #define ADDCILQR(opt, neg, val) \
Michael J. Spencer 1:f5ac63519541 596 if (neg) { \
Michael J. Spencer 1:f5ac63519541 597 LCPDEBUG(LOG_INFO, ("lcp_addci: LQR opt=%d %lX\n", opt, val)); \
Michael J. Spencer 1:f5ac63519541 598 PUTCHAR(opt, ucp); \
Michael J. Spencer 1:f5ac63519541 599 PUTCHAR(CILEN_LQR, ucp); \
Michael J. Spencer 1:f5ac63519541 600 PUTSHORT(PPP_LQR, ucp); \
Michael J. Spencer 1:f5ac63519541 601 PUTLONG(val, ucp); \
Michael J. Spencer 1:f5ac63519541 602 }
Michael J. Spencer 1:f5ac63519541 603 #define ADDCICHAR(opt, neg, val) \
Michael J. Spencer 1:f5ac63519541 604 if (neg) { \
Michael J. Spencer 1:f5ac63519541 605 LCPDEBUG(LOG_INFO, ("lcp_addci: CHAR opt=%d %X '%z'\n", opt, val, val)); \
Michael J. Spencer 1:f5ac63519541 606 PUTCHAR(opt, ucp); \
Michael J. Spencer 1:f5ac63519541 607 PUTCHAR(CILEN_CHAR, ucp); \
Michael J. Spencer 1:f5ac63519541 608 PUTCHAR(val, ucp); \
Michael J. Spencer 1:f5ac63519541 609 }
Michael J. Spencer 1:f5ac63519541 610
Michael J. Spencer 1:f5ac63519541 611 ADDCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
Michael J. Spencer 1:f5ac63519541 612 ADDCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
Michael J. Spencer 1:f5ac63519541 613 ADDCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
Michael J. Spencer 1:f5ac63519541 614 ADDCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
Michael J. Spencer 1:f5ac63519541 615 ADDCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
Michael J. Spencer 1:f5ac63519541 616 ADDCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
Michael J. Spencer 1:f5ac63519541 617 ADDCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
Michael J. Spencer 1:f5ac63519541 618 ADDCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
Michael J. Spencer 1:f5ac63519541 619 ADDCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
Michael J. Spencer 1:f5ac63519541 620
Michael J. Spencer 1:f5ac63519541 621 if (ucp - start_ucp != *lenp) {
Michael J. Spencer 1:f5ac63519541 622 /* this should never happen, because peer_mtu should be 1500 */
Michael J. Spencer 1:f5ac63519541 623 LCPDEBUG(LOG_ERR, ("Bug in lcp_addci: wrong length\n"));
Michael J. Spencer 1:f5ac63519541 624 }
Michael J. Spencer 1:f5ac63519541 625 }
Michael J. Spencer 1:f5ac63519541 626
Michael J. Spencer 1:f5ac63519541 627
Michael J. Spencer 1:f5ac63519541 628 /*
Michael J. Spencer 1:f5ac63519541 629 * lcp_ackci - Ack our CIs.
Michael J. Spencer 1:f5ac63519541 630 * This should not modify any state if the Ack is bad.
Michael J. Spencer 1:f5ac63519541 631 *
Michael J. Spencer 1:f5ac63519541 632 * Returns:
Michael J. Spencer 1:f5ac63519541 633 * 0 - Ack was bad.
Michael J. Spencer 1:f5ac63519541 634 * 1 - Ack was good.
Michael J. Spencer 1:f5ac63519541 635 */
Michael J. Spencer 1:f5ac63519541 636 static int
Michael J. Spencer 1:f5ac63519541 637 lcp_ackci(fsm *f, u_char *p, int len)
Michael J. Spencer 1:f5ac63519541 638 {
Michael J. Spencer 1:f5ac63519541 639 lcp_options *go = &lcp_gotoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 640 u_char cilen, citype, cichar;
Michael J. Spencer 1:f5ac63519541 641 u_short cishort;
Michael J. Spencer 1:f5ac63519541 642 u32_t cilong;
Michael J. Spencer 1:f5ac63519541 643
Michael J. Spencer 1:f5ac63519541 644 /*
Michael J. Spencer 1:f5ac63519541 645 * CIs must be in exactly the same order that we sent.
Michael J. Spencer 1:f5ac63519541 646 * Check packet length and CI length at each step.
Michael J. Spencer 1:f5ac63519541 647 * If we find any deviations, then this packet is bad.
Michael J. Spencer 1:f5ac63519541 648 */
Michael J. Spencer 1:f5ac63519541 649 #define ACKCIVOID(opt, neg) \
Michael J. Spencer 1:f5ac63519541 650 if (neg) { \
Michael J. Spencer 1:f5ac63519541 651 if ((len -= CILEN_VOID) < 0) \
Michael J. Spencer 1:f5ac63519541 652 goto bad; \
Michael J. Spencer 1:f5ac63519541 653 GETCHAR(citype, p); \
Michael J. Spencer 1:f5ac63519541 654 GETCHAR(cilen, p); \
Michael J. Spencer 1:f5ac63519541 655 if (cilen != CILEN_VOID || citype != opt) \
Michael J. Spencer 1:f5ac63519541 656 goto bad; \
Michael J. Spencer 1:f5ac63519541 657 }
Michael J. Spencer 1:f5ac63519541 658 #define ACKCISHORT(opt, neg, val) \
Michael J. Spencer 1:f5ac63519541 659 if (neg) { \
Michael J. Spencer 1:f5ac63519541 660 if ((len -= CILEN_SHORT) < 0) \
Michael J. Spencer 1:f5ac63519541 661 goto bad; \
Michael J. Spencer 1:f5ac63519541 662 GETCHAR(citype, p); \
Michael J. Spencer 1:f5ac63519541 663 GETCHAR(cilen, p); \
Michael J. Spencer 1:f5ac63519541 664 if (cilen != CILEN_SHORT || citype != opt) \
Michael J. Spencer 1:f5ac63519541 665 goto bad; \
Michael J. Spencer 1:f5ac63519541 666 GETSHORT(cishort, p); \
Michael J. Spencer 1:f5ac63519541 667 if (cishort != val) \
Michael J. Spencer 1:f5ac63519541 668 goto bad; \
Michael J. Spencer 1:f5ac63519541 669 }
Michael J. Spencer 1:f5ac63519541 670 #define ACKCICHAR(opt, neg, val) \
Michael J. Spencer 1:f5ac63519541 671 if (neg) { \
Michael J. Spencer 1:f5ac63519541 672 if ((len -= CILEN_CHAR) < 0) \
Michael J. Spencer 1:f5ac63519541 673 goto bad; \
Michael J. Spencer 1:f5ac63519541 674 GETCHAR(citype, p); \
Michael J. Spencer 1:f5ac63519541 675 GETCHAR(cilen, p); \
Michael J. Spencer 1:f5ac63519541 676 if (cilen != CILEN_CHAR || citype != opt) \
Michael J. Spencer 1:f5ac63519541 677 goto bad; \
Michael J. Spencer 1:f5ac63519541 678 GETCHAR(cichar, p); \
Michael J. Spencer 1:f5ac63519541 679 if (cichar != val) \
Michael J. Spencer 1:f5ac63519541 680 goto bad; \
Michael J. Spencer 1:f5ac63519541 681 }
Michael J. Spencer 1:f5ac63519541 682 #define ACKCICHAP(opt, neg, val, digest) \
Michael J. Spencer 1:f5ac63519541 683 if (neg) { \
Michael J. Spencer 1:f5ac63519541 684 if ((len -= CILEN_CHAP) < 0) \
Michael J. Spencer 1:f5ac63519541 685 goto bad; \
Michael J. Spencer 1:f5ac63519541 686 GETCHAR(citype, p); \
Michael J. Spencer 1:f5ac63519541 687 GETCHAR(cilen, p); \
Michael J. Spencer 1:f5ac63519541 688 if (cilen != CILEN_CHAP || citype != opt) \
Michael J. Spencer 1:f5ac63519541 689 goto bad; \
Michael J. Spencer 1:f5ac63519541 690 GETSHORT(cishort, p); \
Michael J. Spencer 1:f5ac63519541 691 if (cishort != val) \
Michael J. Spencer 1:f5ac63519541 692 goto bad; \
Michael J. Spencer 1:f5ac63519541 693 GETCHAR(cichar, p); \
Michael J. Spencer 1:f5ac63519541 694 if (cichar != digest) \
Michael J. Spencer 1:f5ac63519541 695 goto bad; \
Michael J. Spencer 1:f5ac63519541 696 }
Michael J. Spencer 1:f5ac63519541 697 #define ACKCILONG(opt, neg, val) \
Michael J. Spencer 1:f5ac63519541 698 if (neg) { \
Michael J. Spencer 1:f5ac63519541 699 if ((len -= CILEN_LONG) < 0) \
Michael J. Spencer 1:f5ac63519541 700 goto bad; \
Michael J. Spencer 1:f5ac63519541 701 GETCHAR(citype, p); \
Michael J. Spencer 1:f5ac63519541 702 GETCHAR(cilen, p); \
Michael J. Spencer 1:f5ac63519541 703 if (cilen != CILEN_LONG || citype != opt) \
Michael J. Spencer 1:f5ac63519541 704 goto bad; \
Michael J. Spencer 1:f5ac63519541 705 GETLONG(cilong, p); \
Michael J. Spencer 1:f5ac63519541 706 if (cilong != val) \
Michael J. Spencer 1:f5ac63519541 707 goto bad; \
Michael J. Spencer 1:f5ac63519541 708 }
Michael J. Spencer 1:f5ac63519541 709 #define ACKCILQR(opt, neg, val) \
Michael J. Spencer 1:f5ac63519541 710 if (neg) { \
Michael J. Spencer 1:f5ac63519541 711 if ((len -= CILEN_LQR) < 0) \
Michael J. Spencer 1:f5ac63519541 712 goto bad; \
Michael J. Spencer 1:f5ac63519541 713 GETCHAR(citype, p); \
Michael J. Spencer 1:f5ac63519541 714 GETCHAR(cilen, p); \
Michael J. Spencer 1:f5ac63519541 715 if (cilen != CILEN_LQR || citype != opt) \
Michael J. Spencer 1:f5ac63519541 716 goto bad; \
Michael J. Spencer 1:f5ac63519541 717 GETSHORT(cishort, p); \
Michael J. Spencer 1:f5ac63519541 718 if (cishort != PPP_LQR) \
Michael J. Spencer 1:f5ac63519541 719 goto bad; \
Michael J. Spencer 1:f5ac63519541 720 GETLONG(cilong, p); \
Michael J. Spencer 1:f5ac63519541 721 if (cilong != val) \
Michael J. Spencer 1:f5ac63519541 722 goto bad; \
Michael J. Spencer 1:f5ac63519541 723 }
Michael J. Spencer 1:f5ac63519541 724
Michael J. Spencer 1:f5ac63519541 725 ACKCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
Michael J. Spencer 1:f5ac63519541 726 ACKCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
Michael J. Spencer 1:f5ac63519541 727 ACKCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
Michael J. Spencer 1:f5ac63519541 728 ACKCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
Michael J. Spencer 1:f5ac63519541 729 ACKCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
Michael J. Spencer 1:f5ac63519541 730 ACKCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
Michael J. Spencer 1:f5ac63519541 731 ACKCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
Michael J. Spencer 1:f5ac63519541 732 ACKCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
Michael J. Spencer 1:f5ac63519541 733 ACKCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
Michael J. Spencer 1:f5ac63519541 734
Michael J. Spencer 1:f5ac63519541 735 /*
Michael J. Spencer 1:f5ac63519541 736 * If there are any remaining CIs, then this packet is bad.
Michael J. Spencer 1:f5ac63519541 737 */
Michael J. Spencer 1:f5ac63519541 738 if (len != 0) {
Michael J. Spencer 1:f5ac63519541 739 goto bad;
Michael J. Spencer 1:f5ac63519541 740 }
Michael J. Spencer 1:f5ac63519541 741 LCPDEBUG(LOG_INFO, ("lcp_acki: Ack\n"));
Michael J. Spencer 1:f5ac63519541 742 return (1);
Michael J. Spencer 1:f5ac63519541 743 bad:
Michael J. Spencer 1:f5ac63519541 744 LCPDEBUG(LOG_WARNING, ("lcp_acki: received bad Ack!\n"));
Michael J. Spencer 1:f5ac63519541 745 return (0);
Michael J. Spencer 1:f5ac63519541 746 }
Michael J. Spencer 1:f5ac63519541 747
Michael J. Spencer 1:f5ac63519541 748
Michael J. Spencer 1:f5ac63519541 749 /*
Michael J. Spencer 1:f5ac63519541 750 * lcp_nakci - Peer has sent a NAK for some of our CIs.
Michael J. Spencer 1:f5ac63519541 751 * This should not modify any state if the Nak is bad
Michael J. Spencer 1:f5ac63519541 752 * or if LCP is in the LS_OPENED state.
Michael J. Spencer 1:f5ac63519541 753 *
Michael J. Spencer 1:f5ac63519541 754 * Returns:
Michael J. Spencer 1:f5ac63519541 755 * 0 - Nak was bad.
Michael J. Spencer 1:f5ac63519541 756 * 1 - Nak was good.
Michael J. Spencer 1:f5ac63519541 757 */
Michael J. Spencer 1:f5ac63519541 758 static int
Michael J. Spencer 1:f5ac63519541 759 lcp_nakci(fsm *f, u_char *p, int len)
Michael J. Spencer 1:f5ac63519541 760 {
Michael J. Spencer 1:f5ac63519541 761 lcp_options *go = &lcp_gotoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 762 lcp_options *wo = &lcp_wantoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 763 u_char citype, cichar, *next;
Michael J. Spencer 1:f5ac63519541 764 u_short cishort;
Michael J. Spencer 1:f5ac63519541 765 u32_t cilong;
Michael J. Spencer 1:f5ac63519541 766 lcp_options no; /* options we've seen Naks for */
Michael J. Spencer 1:f5ac63519541 767 lcp_options try; /* options to request next time */
Michael J. Spencer 1:f5ac63519541 768 int looped_back = 0;
Michael J. Spencer 1:f5ac63519541 769 int cilen;
Michael J. Spencer 1:f5ac63519541 770
Michael J. Spencer 1:f5ac63519541 771 BZERO(&no, sizeof(no));
Michael J. Spencer 1:f5ac63519541 772 try = *go;
Michael J. Spencer 1:f5ac63519541 773
Michael J. Spencer 1:f5ac63519541 774 /*
Michael J. Spencer 1:f5ac63519541 775 * Any Nak'd CIs must be in exactly the same order that we sent.
Michael J. Spencer 1:f5ac63519541 776 * Check packet length and CI length at each step.
Michael J. Spencer 1:f5ac63519541 777 * If we find any deviations, then this packet is bad.
Michael J. Spencer 1:f5ac63519541 778 */
Michael J. Spencer 1:f5ac63519541 779 #define NAKCIVOID(opt, neg, code) \
Michael J. Spencer 1:f5ac63519541 780 if (go->neg && \
Michael J. Spencer 1:f5ac63519541 781 len >= CILEN_VOID && \
Michael J. Spencer 1:f5ac63519541 782 p[1] == CILEN_VOID && \
Michael J. Spencer 1:f5ac63519541 783 p[0] == opt) { \
Michael J. Spencer 1:f5ac63519541 784 len -= CILEN_VOID; \
Michael J. Spencer 1:f5ac63519541 785 INCPTR(CILEN_VOID, p); \
Michael J. Spencer 1:f5ac63519541 786 no.neg = 1; \
Michael J. Spencer 1:f5ac63519541 787 code \
Michael J. Spencer 1:f5ac63519541 788 }
Michael J. Spencer 1:f5ac63519541 789 #define NAKCICHAP(opt, neg, code) \
Michael J. Spencer 1:f5ac63519541 790 if (go->neg && \
Michael J. Spencer 1:f5ac63519541 791 len >= CILEN_CHAP && \
Michael J. Spencer 1:f5ac63519541 792 p[1] == CILEN_CHAP && \
Michael J. Spencer 1:f5ac63519541 793 p[0] == opt) { \
Michael J. Spencer 1:f5ac63519541 794 len -= CILEN_CHAP; \
Michael J. Spencer 1:f5ac63519541 795 INCPTR(2, p); \
Michael J. Spencer 1:f5ac63519541 796 GETSHORT(cishort, p); \
Michael J. Spencer 1:f5ac63519541 797 GETCHAR(cichar, p); \
Michael J. Spencer 1:f5ac63519541 798 no.neg = 1; \
Michael J. Spencer 1:f5ac63519541 799 code \
Michael J. Spencer 1:f5ac63519541 800 }
Michael J. Spencer 1:f5ac63519541 801 #define NAKCICHAR(opt, neg, code) \
Michael J. Spencer 1:f5ac63519541 802 if (go->neg && \
Michael J. Spencer 1:f5ac63519541 803 len >= CILEN_CHAR && \
Michael J. Spencer 1:f5ac63519541 804 p[1] == CILEN_CHAR && \
Michael J. Spencer 1:f5ac63519541 805 p[0] == opt) { \
Michael J. Spencer 1:f5ac63519541 806 len -= CILEN_CHAR; \
Michael J. Spencer 1:f5ac63519541 807 INCPTR(2, p); \
Michael J. Spencer 1:f5ac63519541 808 GETCHAR(cichar, p); \
Michael J. Spencer 1:f5ac63519541 809 no.neg = 1; \
Michael J. Spencer 1:f5ac63519541 810 code \
Michael J. Spencer 1:f5ac63519541 811 }
Michael J. Spencer 1:f5ac63519541 812 #define NAKCISHORT(opt, neg, code) \
Michael J. Spencer 1:f5ac63519541 813 if (go->neg && \
Michael J. Spencer 1:f5ac63519541 814 len >= CILEN_SHORT && \
Michael J. Spencer 1:f5ac63519541 815 p[1] == CILEN_SHORT && \
Michael J. Spencer 1:f5ac63519541 816 p[0] == opt) { \
Michael J. Spencer 1:f5ac63519541 817 len -= CILEN_SHORT; \
Michael J. Spencer 1:f5ac63519541 818 INCPTR(2, p); \
Michael J. Spencer 1:f5ac63519541 819 GETSHORT(cishort, p); \
Michael J. Spencer 1:f5ac63519541 820 no.neg = 1; \
Michael J. Spencer 1:f5ac63519541 821 code \
Michael J. Spencer 1:f5ac63519541 822 }
Michael J. Spencer 1:f5ac63519541 823 #define NAKCILONG(opt, neg, code) \
Michael J. Spencer 1:f5ac63519541 824 if (go->neg && \
Michael J. Spencer 1:f5ac63519541 825 len >= CILEN_LONG && \
Michael J. Spencer 1:f5ac63519541 826 p[1] == CILEN_LONG && \
Michael J. Spencer 1:f5ac63519541 827 p[0] == opt) { \
Michael J. Spencer 1:f5ac63519541 828 len -= CILEN_LONG; \
Michael J. Spencer 1:f5ac63519541 829 INCPTR(2, p); \
Michael J. Spencer 1:f5ac63519541 830 GETLONG(cilong, p); \
Michael J. Spencer 1:f5ac63519541 831 no.neg = 1; \
Michael J. Spencer 1:f5ac63519541 832 code \
Michael J. Spencer 1:f5ac63519541 833 }
Michael J. Spencer 1:f5ac63519541 834 #define NAKCILQR(opt, neg, code) \
Michael J. Spencer 1:f5ac63519541 835 if (go->neg && \
Michael J. Spencer 1:f5ac63519541 836 len >= CILEN_LQR && \
Michael J. Spencer 1:f5ac63519541 837 p[1] == CILEN_LQR && \
Michael J. Spencer 1:f5ac63519541 838 p[0] == opt) { \
Michael J. Spencer 1:f5ac63519541 839 len -= CILEN_LQR; \
Michael J. Spencer 1:f5ac63519541 840 INCPTR(2, p); \
Michael J. Spencer 1:f5ac63519541 841 GETSHORT(cishort, p); \
Michael J. Spencer 1:f5ac63519541 842 GETLONG(cilong, p); \
Michael J. Spencer 1:f5ac63519541 843 no.neg = 1; \
Michael J. Spencer 1:f5ac63519541 844 code \
Michael J. Spencer 1:f5ac63519541 845 }
Michael J. Spencer 1:f5ac63519541 846
Michael J. Spencer 1:f5ac63519541 847 /*
Michael J. Spencer 1:f5ac63519541 848 * We don't care if they want to send us smaller packets than
Michael J. Spencer 1:f5ac63519541 849 * we want. Therefore, accept any MRU less than what we asked for,
Michael J. Spencer 1:f5ac63519541 850 * but then ignore the new value when setting the MRU in the kernel.
Michael J. Spencer 1:f5ac63519541 851 * If they send us a bigger MRU than what we asked, accept it, up to
Michael J. Spencer 1:f5ac63519541 852 * the limit of the default MRU we'd get if we didn't negotiate.
Michael J. Spencer 1:f5ac63519541 853 */
Michael J. Spencer 1:f5ac63519541 854 if (go->neg_mru && go->mru != PPP_DEFMRU) {
Michael J. Spencer 1:f5ac63519541 855 NAKCISHORT(CI_MRU, neg_mru,
Michael J. Spencer 1:f5ac63519541 856 if (cishort <= wo->mru || cishort < PPP_DEFMRU) {
Michael J. Spencer 1:f5ac63519541 857 try.mru = cishort;
Michael J. Spencer 1:f5ac63519541 858 }
Michael J. Spencer 1:f5ac63519541 859 );
Michael J. Spencer 1:f5ac63519541 860 }
Michael J. Spencer 1:f5ac63519541 861
Michael J. Spencer 1:f5ac63519541 862 /*
Michael J. Spencer 1:f5ac63519541 863 * Add any characters they want to our (receive-side) asyncmap.
Michael J. Spencer 1:f5ac63519541 864 */
Michael J. Spencer 1:f5ac63519541 865 if (go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) {
Michael J. Spencer 1:f5ac63519541 866 NAKCILONG(CI_ASYNCMAP, neg_asyncmap,
Michael J. Spencer 1:f5ac63519541 867 try.asyncmap = go->asyncmap | cilong;
Michael J. Spencer 1:f5ac63519541 868 );
Michael J. Spencer 1:f5ac63519541 869 }
Michael J. Spencer 1:f5ac63519541 870
Michael J. Spencer 1:f5ac63519541 871 /*
Michael J. Spencer 1:f5ac63519541 872 * If they've nak'd our authentication-protocol, check whether
Michael J. Spencer 1:f5ac63519541 873 * they are proposing a different protocol, or a different
Michael J. Spencer 1:f5ac63519541 874 * hash algorithm for CHAP.
Michael J. Spencer 1:f5ac63519541 875 */
Michael J. Spencer 1:f5ac63519541 876 if ((go->neg_chap || go->neg_upap)
Michael J. Spencer 1:f5ac63519541 877 && len >= CILEN_SHORT
Michael J. Spencer 1:f5ac63519541 878 && p[0] == CI_AUTHTYPE && p[1] >= CILEN_SHORT && p[1] <= len) {
Michael J. Spencer 1:f5ac63519541 879 cilen = p[1];
Michael J. Spencer 1:f5ac63519541 880 len -= cilen;
Michael J. Spencer 1:f5ac63519541 881 no.neg_chap = go->neg_chap;
Michael J. Spencer 1:f5ac63519541 882 no.neg_upap = go->neg_upap;
Michael J. Spencer 1:f5ac63519541 883 INCPTR(2, p);
Michael J. Spencer 1:f5ac63519541 884 GETSHORT(cishort, p);
Michael J. Spencer 1:f5ac63519541 885 if (cishort == PPP_PAP && cilen == CILEN_SHORT) {
Michael J. Spencer 1:f5ac63519541 886 /*
Michael J. Spencer 1:f5ac63519541 887 * If we were asking for CHAP, they obviously don't want to do it.
Michael J. Spencer 1:f5ac63519541 888 * If we weren't asking for CHAP, then we were asking for PAP,
Michael J. Spencer 1:f5ac63519541 889 * in which case this Nak is bad.
Michael J. Spencer 1:f5ac63519541 890 */
Michael J. Spencer 1:f5ac63519541 891 if (!go->neg_chap) {
Michael J. Spencer 1:f5ac63519541 892 goto bad;
Michael J. Spencer 1:f5ac63519541 893 }
Michael J. Spencer 1:f5ac63519541 894 try.neg_chap = 0;
Michael J. Spencer 1:f5ac63519541 895
Michael J. Spencer 1:f5ac63519541 896 } else if (cishort == PPP_CHAP && cilen == CILEN_CHAP) {
Michael J. Spencer 1:f5ac63519541 897 GETCHAR(cichar, p);
Michael J. Spencer 1:f5ac63519541 898 if (go->neg_chap) {
Michael J. Spencer 1:f5ac63519541 899 /*
Michael J. Spencer 1:f5ac63519541 900 * We were asking for CHAP/MD5; they must want a different
Michael J. Spencer 1:f5ac63519541 901 * algorithm. If they can't do MD5, we'll have to stop
Michael J. Spencer 1:f5ac63519541 902 * asking for CHAP.
Michael J. Spencer 1:f5ac63519541 903 */
Michael J. Spencer 1:f5ac63519541 904 if (cichar != go->chap_mdtype) {
Michael J. Spencer 1:f5ac63519541 905 try.neg_chap = 0;
Michael J. Spencer 1:f5ac63519541 906 }
Michael J. Spencer 1:f5ac63519541 907 } else {
Michael J. Spencer 1:f5ac63519541 908 /*
Michael J. Spencer 1:f5ac63519541 909 * Stop asking for PAP if we were asking for it.
Michael J. Spencer 1:f5ac63519541 910 */
Michael J. Spencer 1:f5ac63519541 911 try.neg_upap = 0;
Michael J. Spencer 1:f5ac63519541 912 }
Michael J. Spencer 1:f5ac63519541 913
Michael J. Spencer 1:f5ac63519541 914 } else {
Michael J. Spencer 1:f5ac63519541 915 /*
Michael J. Spencer 1:f5ac63519541 916 * We don't recognize what they're suggesting.
Michael J. Spencer 1:f5ac63519541 917 * Stop asking for what we were asking for.
Michael J. Spencer 1:f5ac63519541 918 */
Michael J. Spencer 1:f5ac63519541 919 if (go->neg_chap) {
Michael J. Spencer 1:f5ac63519541 920 try.neg_chap = 0;
Michael J. Spencer 1:f5ac63519541 921 } else {
Michael J. Spencer 1:f5ac63519541 922 try.neg_upap = 0;
Michael J. Spencer 1:f5ac63519541 923 }
Michael J. Spencer 1:f5ac63519541 924 p += cilen - CILEN_SHORT;
Michael J. Spencer 1:f5ac63519541 925 }
Michael J. Spencer 1:f5ac63519541 926 }
Michael J. Spencer 1:f5ac63519541 927
Michael J. Spencer 1:f5ac63519541 928 /*
Michael J. Spencer 1:f5ac63519541 929 * If they can't cope with our link quality protocol, we'll have
Michael J. Spencer 1:f5ac63519541 930 * to stop asking for LQR. We haven't got any other protocol.
Michael J. Spencer 1:f5ac63519541 931 * If they Nak the reporting period, take their value XXX ?
Michael J. Spencer 1:f5ac63519541 932 */
Michael J. Spencer 1:f5ac63519541 933 NAKCILQR(CI_QUALITY, neg_lqr,
Michael J. Spencer 1:f5ac63519541 934 if (cishort != PPP_LQR) {
Michael J. Spencer 1:f5ac63519541 935 try.neg_lqr = 0;
Michael J. Spencer 1:f5ac63519541 936 } else {
Michael J. Spencer 1:f5ac63519541 937 try.lqr_period = cilong;
Michael J. Spencer 1:f5ac63519541 938 }
Michael J. Spencer 1:f5ac63519541 939 );
Michael J. Spencer 1:f5ac63519541 940
Michael J. Spencer 1:f5ac63519541 941 /*
Michael J. Spencer 1:f5ac63519541 942 * Only implementing CBCP...not the rest of the callback options
Michael J. Spencer 1:f5ac63519541 943 */
Michael J. Spencer 1:f5ac63519541 944 NAKCICHAR(CI_CALLBACK, neg_cbcp,
Michael J. Spencer 1:f5ac63519541 945 try.neg_cbcp = 0;
Michael J. Spencer 1:f5ac63519541 946 );
Michael J. Spencer 1:f5ac63519541 947
Michael J. Spencer 1:f5ac63519541 948 /*
Michael J. Spencer 1:f5ac63519541 949 * Check for a looped-back line.
Michael J. Spencer 1:f5ac63519541 950 */
Michael J. Spencer 1:f5ac63519541 951 NAKCILONG(CI_MAGICNUMBER, neg_magicnumber,
Michael J. Spencer 1:f5ac63519541 952 try.magicnumber = magic();
Michael J. Spencer 1:f5ac63519541 953 looped_back = 1;
Michael J. Spencer 1:f5ac63519541 954 );
Michael J. Spencer 1:f5ac63519541 955
Michael J. Spencer 1:f5ac63519541 956 /*
Michael J. Spencer 1:f5ac63519541 957 * Peer shouldn't send Nak for protocol compression or
Michael J. Spencer 1:f5ac63519541 958 * address/control compression requests; they should send
Michael J. Spencer 1:f5ac63519541 959 * a Reject instead. If they send a Nak, treat it as a Reject.
Michael J. Spencer 1:f5ac63519541 960 */
Michael J. Spencer 1:f5ac63519541 961 NAKCIVOID(CI_PCOMPRESSION, neg_pcompression,
Michael J. Spencer 1:f5ac63519541 962 try.neg_pcompression = 0;
Michael J. Spencer 1:f5ac63519541 963 );
Michael J. Spencer 1:f5ac63519541 964 NAKCIVOID(CI_ACCOMPRESSION, neg_accompression,
Michael J. Spencer 1:f5ac63519541 965 try.neg_accompression = 0;
Michael J. Spencer 1:f5ac63519541 966 );
Michael J. Spencer 1:f5ac63519541 967
Michael J. Spencer 1:f5ac63519541 968 /*
Michael J. Spencer 1:f5ac63519541 969 * There may be remaining CIs, if the peer is requesting negotiation
Michael J. Spencer 1:f5ac63519541 970 * on an option that we didn't include in our request packet.
Michael J. Spencer 1:f5ac63519541 971 * If we see an option that we requested, or one we've already seen
Michael J. Spencer 1:f5ac63519541 972 * in this packet, then this packet is bad.
Michael J. Spencer 1:f5ac63519541 973 * If we wanted to respond by starting to negotiate on the requested
Michael J. Spencer 1:f5ac63519541 974 * option(s), we could, but we don't, because except for the
Michael J. Spencer 1:f5ac63519541 975 * authentication type and quality protocol, if we are not negotiating
Michael J. Spencer 1:f5ac63519541 976 * an option, it is because we were told not to.
Michael J. Spencer 1:f5ac63519541 977 * For the authentication type, the Nak from the peer means
Michael J. Spencer 1:f5ac63519541 978 * `let me authenticate myself with you' which is a bit pointless.
Michael J. Spencer 1:f5ac63519541 979 * For the quality protocol, the Nak means `ask me to send you quality
Michael J. Spencer 1:f5ac63519541 980 * reports', but if we didn't ask for them, we don't want them.
Michael J. Spencer 1:f5ac63519541 981 * An option we don't recognize represents the peer asking to
Michael J. Spencer 1:f5ac63519541 982 * negotiate some option we don't support, so ignore it.
Michael J. Spencer 1:f5ac63519541 983 */
Michael J. Spencer 1:f5ac63519541 984 while (len > CILEN_VOID) {
Michael J. Spencer 1:f5ac63519541 985 GETCHAR(citype, p);
Michael J. Spencer 1:f5ac63519541 986 GETCHAR(cilen, p);
Michael J. Spencer 1:f5ac63519541 987 if (cilen < CILEN_VOID || (len -= cilen) < 0) {
Michael J. Spencer 1:f5ac63519541 988 goto bad;
Michael J. Spencer 1:f5ac63519541 989 }
Michael J. Spencer 1:f5ac63519541 990 next = p + cilen - 2;
Michael J. Spencer 1:f5ac63519541 991
Michael J. Spencer 1:f5ac63519541 992 switch (citype) {
Michael J. Spencer 1:f5ac63519541 993 case CI_MRU:
Michael J. Spencer 1:f5ac63519541 994 if ((go->neg_mru && go->mru != PPP_DEFMRU)
Michael J. Spencer 1:f5ac63519541 995 || no.neg_mru || cilen != CILEN_SHORT) {
Michael J. Spencer 1:f5ac63519541 996 goto bad;
Michael J. Spencer 1:f5ac63519541 997 }
Michael J. Spencer 1:f5ac63519541 998 GETSHORT(cishort, p);
Michael J. Spencer 1:f5ac63519541 999 if (cishort < PPP_DEFMRU) {
Michael J. Spencer 1:f5ac63519541 1000 try.mru = cishort;
Michael J. Spencer 1:f5ac63519541 1001 }
Michael J. Spencer 1:f5ac63519541 1002 break;
Michael J. Spencer 1:f5ac63519541 1003 case CI_ASYNCMAP:
Michael J. Spencer 1:f5ac63519541 1004 if ((go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl)
Michael J. Spencer 1:f5ac63519541 1005 || no.neg_asyncmap || cilen != CILEN_LONG) {
Michael J. Spencer 1:f5ac63519541 1006 goto bad;
Michael J. Spencer 1:f5ac63519541 1007 }
Michael J. Spencer 1:f5ac63519541 1008 break;
Michael J. Spencer 1:f5ac63519541 1009 case CI_AUTHTYPE:
Michael J. Spencer 1:f5ac63519541 1010 if (go->neg_chap || no.neg_chap || go->neg_upap || no.neg_upap) {
Michael J. Spencer 1:f5ac63519541 1011 goto bad;
Michael J. Spencer 1:f5ac63519541 1012 }
Michael J. Spencer 1:f5ac63519541 1013 break;
Michael J. Spencer 1:f5ac63519541 1014 case CI_MAGICNUMBER:
Michael J. Spencer 1:f5ac63519541 1015 if (go->neg_magicnumber || no.neg_magicnumber ||
Michael J. Spencer 1:f5ac63519541 1016 cilen != CILEN_LONG) {
Michael J. Spencer 1:f5ac63519541 1017 goto bad;
Michael J. Spencer 1:f5ac63519541 1018 }
Michael J. Spencer 1:f5ac63519541 1019 break;
Michael J. Spencer 1:f5ac63519541 1020 case CI_PCOMPRESSION:
Michael J. Spencer 1:f5ac63519541 1021 if (go->neg_pcompression || no.neg_pcompression
Michael J. Spencer 1:f5ac63519541 1022 || cilen != CILEN_VOID) {
Michael J. Spencer 1:f5ac63519541 1023 goto bad;
Michael J. Spencer 1:f5ac63519541 1024 }
Michael J. Spencer 1:f5ac63519541 1025 break;
Michael J. Spencer 1:f5ac63519541 1026 case CI_ACCOMPRESSION:
Michael J. Spencer 1:f5ac63519541 1027 if (go->neg_accompression || no.neg_accompression
Michael J. Spencer 1:f5ac63519541 1028 || cilen != CILEN_VOID) {
Michael J. Spencer 1:f5ac63519541 1029 goto bad;
Michael J. Spencer 1:f5ac63519541 1030 }
Michael J. Spencer 1:f5ac63519541 1031 break;
Michael J. Spencer 1:f5ac63519541 1032 case CI_QUALITY:
Michael J. Spencer 1:f5ac63519541 1033 if (go->neg_lqr || no.neg_lqr || cilen != CILEN_LQR) {
Michael J. Spencer 1:f5ac63519541 1034 goto bad;
Michael J. Spencer 1:f5ac63519541 1035 }
Michael J. Spencer 1:f5ac63519541 1036 break;
Michael J. Spencer 1:f5ac63519541 1037 }
Michael J. Spencer 1:f5ac63519541 1038 p = next;
Michael J. Spencer 1:f5ac63519541 1039 }
Michael J. Spencer 1:f5ac63519541 1040
Michael J. Spencer 1:f5ac63519541 1041 /* If there is still anything left, this packet is bad. */
Michael J. Spencer 1:f5ac63519541 1042 if (len != 0) {
Michael J. Spencer 1:f5ac63519541 1043 goto bad;
Michael J. Spencer 1:f5ac63519541 1044 }
Michael J. Spencer 1:f5ac63519541 1045
Michael J. Spencer 1:f5ac63519541 1046 /*
Michael J. Spencer 1:f5ac63519541 1047 * OK, the Nak is good. Now we can update state.
Michael J. Spencer 1:f5ac63519541 1048 */
Michael J. Spencer 1:f5ac63519541 1049 if (f->state != LS_OPENED) {
Michael J. Spencer 1:f5ac63519541 1050 if (looped_back) {
Michael J. Spencer 1:f5ac63519541 1051 if (++try.numloops >= lcp_loopbackfail) {
Michael J. Spencer 1:f5ac63519541 1052 LCPDEBUG(LOG_NOTICE, ("Serial line is looped back.\n"));
Michael J. Spencer 1:f5ac63519541 1053 lcp_close(f->unit, "Loopback detected");
Michael J. Spencer 1:f5ac63519541 1054 }
Michael J. Spencer 1:f5ac63519541 1055 } else {
Michael J. Spencer 1:f5ac63519541 1056 try.numloops = 0;
Michael J. Spencer 1:f5ac63519541 1057 }
Michael J. Spencer 1:f5ac63519541 1058 *go = try;
Michael J. Spencer 1:f5ac63519541 1059 }
Michael J. Spencer 1:f5ac63519541 1060
Michael J. Spencer 1:f5ac63519541 1061 return 1;
Michael J. Spencer 1:f5ac63519541 1062
Michael J. Spencer 1:f5ac63519541 1063 bad:
Michael J. Spencer 1:f5ac63519541 1064 LCPDEBUG(LOG_WARNING, ("lcp_nakci: received bad Nak!\n"));
Michael J. Spencer 1:f5ac63519541 1065 return 0;
Michael J. Spencer 1:f5ac63519541 1066 }
Michael J. Spencer 1:f5ac63519541 1067
Michael J. Spencer 1:f5ac63519541 1068
Michael J. Spencer 1:f5ac63519541 1069 /*
Michael J. Spencer 1:f5ac63519541 1070 * lcp_rejci - Peer has Rejected some of our CIs.
Michael J. Spencer 1:f5ac63519541 1071 * This should not modify any state if the Reject is bad
Michael J. Spencer 1:f5ac63519541 1072 * or if LCP is in the LS_OPENED state.
Michael J. Spencer 1:f5ac63519541 1073 *
Michael J. Spencer 1:f5ac63519541 1074 * Returns:
Michael J. Spencer 1:f5ac63519541 1075 * 0 - Reject was bad.
Michael J. Spencer 1:f5ac63519541 1076 * 1 - Reject was good.
Michael J. Spencer 1:f5ac63519541 1077 */
Michael J. Spencer 1:f5ac63519541 1078 static int
Michael J. Spencer 1:f5ac63519541 1079 lcp_rejci(fsm *f, u_char *p, int len)
Michael J. Spencer 1:f5ac63519541 1080 {
Michael J. Spencer 1:f5ac63519541 1081 lcp_options *go = &lcp_gotoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 1082 u_char cichar;
Michael J. Spencer 1:f5ac63519541 1083 u_short cishort;
Michael J. Spencer 1:f5ac63519541 1084 u32_t cilong;
Michael J. Spencer 1:f5ac63519541 1085 lcp_options try; /* options to request next time */
Michael J. Spencer 1:f5ac63519541 1086
Michael J. Spencer 1:f5ac63519541 1087 try = *go;
Michael J. Spencer 1:f5ac63519541 1088
Michael J. Spencer 1:f5ac63519541 1089 /*
Michael J. Spencer 1:f5ac63519541 1090 * Any Rejected CIs must be in exactly the same order that we sent.
Michael J. Spencer 1:f5ac63519541 1091 * Check packet length and CI length at each step.
Michael J. Spencer 1:f5ac63519541 1092 * If we find any deviations, then this packet is bad.
Michael J. Spencer 1:f5ac63519541 1093 */
Michael J. Spencer 1:f5ac63519541 1094 #define REJCIVOID(opt, neg) \
Michael J. Spencer 1:f5ac63519541 1095 if (go->neg && \
Michael J. Spencer 1:f5ac63519541 1096 len >= CILEN_VOID && \
Michael J. Spencer 1:f5ac63519541 1097 p[1] == CILEN_VOID && \
Michael J. Spencer 1:f5ac63519541 1098 p[0] == opt) { \
Michael J. Spencer 1:f5ac63519541 1099 len -= CILEN_VOID; \
Michael J. Spencer 1:f5ac63519541 1100 INCPTR(CILEN_VOID, p); \
Michael J. Spencer 1:f5ac63519541 1101 try.neg = 0; \
Michael J. Spencer 1:f5ac63519541 1102 LCPDEBUG(LOG_INFO, ("lcp_rejci: void opt %d rejected\n", opt)); \
Michael J. Spencer 1:f5ac63519541 1103 }
Michael J. Spencer 1:f5ac63519541 1104 #define REJCISHORT(opt, neg, val) \
Michael J. Spencer 1:f5ac63519541 1105 if (go->neg && \
Michael J. Spencer 1:f5ac63519541 1106 len >= CILEN_SHORT && \
Michael J. Spencer 1:f5ac63519541 1107 p[1] == CILEN_SHORT && \
Michael J. Spencer 1:f5ac63519541 1108 p[0] == opt) { \
Michael J. Spencer 1:f5ac63519541 1109 len -= CILEN_SHORT; \
Michael J. Spencer 1:f5ac63519541 1110 INCPTR(2, p); \
Michael J. Spencer 1:f5ac63519541 1111 GETSHORT(cishort, p); \
Michael J. Spencer 1:f5ac63519541 1112 /* Check rejected value. */ \
Michael J. Spencer 1:f5ac63519541 1113 if (cishort != val) { \
Michael J. Spencer 1:f5ac63519541 1114 goto bad; \
Michael J. Spencer 1:f5ac63519541 1115 } \
Michael J. Spencer 1:f5ac63519541 1116 try.neg = 0; \
Michael J. Spencer 1:f5ac63519541 1117 LCPDEBUG(LOG_INFO, ("lcp_rejci: short opt %d rejected\n", opt)); \
Michael J. Spencer 1:f5ac63519541 1118 }
Michael J. Spencer 1:f5ac63519541 1119 #define REJCICHAP(opt, neg, val, digest) \
Michael J. Spencer 1:f5ac63519541 1120 if (go->neg && \
Michael J. Spencer 1:f5ac63519541 1121 len >= CILEN_CHAP && \
Michael J. Spencer 1:f5ac63519541 1122 p[1] == CILEN_CHAP && \
Michael J. Spencer 1:f5ac63519541 1123 p[0] == opt) { \
Michael J. Spencer 1:f5ac63519541 1124 len -= CILEN_CHAP; \
Michael J. Spencer 1:f5ac63519541 1125 INCPTR(2, p); \
Michael J. Spencer 1:f5ac63519541 1126 GETSHORT(cishort, p); \
Michael J. Spencer 1:f5ac63519541 1127 GETCHAR(cichar, p); \
Michael J. Spencer 1:f5ac63519541 1128 /* Check rejected value. */ \
Michael J. Spencer 1:f5ac63519541 1129 if (cishort != val || cichar != digest) { \
Michael J. Spencer 1:f5ac63519541 1130 goto bad; \
Michael J. Spencer 1:f5ac63519541 1131 } \
Michael J. Spencer 1:f5ac63519541 1132 try.neg = 0; \
Michael J. Spencer 1:f5ac63519541 1133 try.neg_upap = 0; \
Michael J. Spencer 1:f5ac63519541 1134 LCPDEBUG(LOG_INFO, ("lcp_rejci: chap opt %d rejected\n", opt)); \
Michael J. Spencer 1:f5ac63519541 1135 }
Michael J. Spencer 1:f5ac63519541 1136 #define REJCILONG(opt, neg, val) \
Michael J. Spencer 1:f5ac63519541 1137 if (go->neg && \
Michael J. Spencer 1:f5ac63519541 1138 len >= CILEN_LONG && \
Michael J. Spencer 1:f5ac63519541 1139 p[1] == CILEN_LONG && \
Michael J. Spencer 1:f5ac63519541 1140 p[0] == opt) { \
Michael J. Spencer 1:f5ac63519541 1141 len -= CILEN_LONG; \
Michael J. Spencer 1:f5ac63519541 1142 INCPTR(2, p); \
Michael J. Spencer 1:f5ac63519541 1143 GETLONG(cilong, p); \
Michael J. Spencer 1:f5ac63519541 1144 /* Check rejected value. */ \
Michael J. Spencer 1:f5ac63519541 1145 if (cilong != val) { \
Michael J. Spencer 1:f5ac63519541 1146 goto bad; \
Michael J. Spencer 1:f5ac63519541 1147 } \
Michael J. Spencer 1:f5ac63519541 1148 try.neg = 0; \
Michael J. Spencer 1:f5ac63519541 1149 LCPDEBUG(LOG_INFO, ("lcp_rejci: long opt %d rejected\n", opt)); \
Michael J. Spencer 1:f5ac63519541 1150 }
Michael J. Spencer 1:f5ac63519541 1151 #define REJCILQR(opt, neg, val) \
Michael J. Spencer 1:f5ac63519541 1152 if (go->neg && \
Michael J. Spencer 1:f5ac63519541 1153 len >= CILEN_LQR && \
Michael J. Spencer 1:f5ac63519541 1154 p[1] == CILEN_LQR && \
Michael J. Spencer 1:f5ac63519541 1155 p[0] == opt) { \
Michael J. Spencer 1:f5ac63519541 1156 len -= CILEN_LQR; \
Michael J. Spencer 1:f5ac63519541 1157 INCPTR(2, p); \
Michael J. Spencer 1:f5ac63519541 1158 GETSHORT(cishort, p); \
Michael J. Spencer 1:f5ac63519541 1159 GETLONG(cilong, p); \
Michael J. Spencer 1:f5ac63519541 1160 /* Check rejected value. */ \
Michael J. Spencer 1:f5ac63519541 1161 if (cishort != PPP_LQR || cilong != val) { \
Michael J. Spencer 1:f5ac63519541 1162 goto bad; \
Michael J. Spencer 1:f5ac63519541 1163 } \
Michael J. Spencer 1:f5ac63519541 1164 try.neg = 0; \
Michael J. Spencer 1:f5ac63519541 1165 LCPDEBUG(LOG_INFO, ("lcp_rejci: LQR opt %d rejected\n", opt)); \
Michael J. Spencer 1:f5ac63519541 1166 }
Michael J. Spencer 1:f5ac63519541 1167 #define REJCICBCP(opt, neg, val) \
Michael J. Spencer 1:f5ac63519541 1168 if (go->neg && \
Michael J. Spencer 1:f5ac63519541 1169 len >= CILEN_CBCP && \
Michael J. Spencer 1:f5ac63519541 1170 p[1] == CILEN_CBCP && \
Michael J. Spencer 1:f5ac63519541 1171 p[0] == opt) { \
Michael J. Spencer 1:f5ac63519541 1172 len -= CILEN_CBCP; \
Michael J. Spencer 1:f5ac63519541 1173 INCPTR(2, p); \
Michael J. Spencer 1:f5ac63519541 1174 GETCHAR(cichar, p); \
Michael J. Spencer 1:f5ac63519541 1175 /* Check rejected value. */ \
Michael J. Spencer 1:f5ac63519541 1176 if (cichar != val) { \
Michael J. Spencer 1:f5ac63519541 1177 goto bad; \
Michael J. Spencer 1:f5ac63519541 1178 } \
Michael J. Spencer 1:f5ac63519541 1179 try.neg = 0; \
Michael J. Spencer 1:f5ac63519541 1180 LCPDEBUG(LOG_INFO, ("lcp_rejci: Callback opt %d rejected\n", opt)); \
Michael J. Spencer 1:f5ac63519541 1181 }
Michael J. Spencer 1:f5ac63519541 1182
Michael J. Spencer 1:f5ac63519541 1183 REJCISHORT(CI_MRU, neg_mru, go->mru);
Michael J. Spencer 1:f5ac63519541 1184 REJCILONG(CI_ASYNCMAP, neg_asyncmap, go->asyncmap);
Michael J. Spencer 1:f5ac63519541 1185 REJCICHAP(CI_AUTHTYPE, neg_chap, PPP_CHAP, go->chap_mdtype);
Michael J. Spencer 1:f5ac63519541 1186 if (!go->neg_chap) {
Michael J. Spencer 1:f5ac63519541 1187 REJCISHORT(CI_AUTHTYPE, neg_upap, PPP_PAP);
Michael J. Spencer 1:f5ac63519541 1188 }
Michael J. Spencer 1:f5ac63519541 1189 REJCILQR(CI_QUALITY, neg_lqr, go->lqr_period);
Michael J. Spencer 1:f5ac63519541 1190 REJCICBCP(CI_CALLBACK, neg_cbcp, CBCP_OPT);
Michael J. Spencer 1:f5ac63519541 1191 REJCILONG(CI_MAGICNUMBER, neg_magicnumber, go->magicnumber);
Michael J. Spencer 1:f5ac63519541 1192 REJCIVOID(CI_PCOMPRESSION, neg_pcompression);
Michael J. Spencer 1:f5ac63519541 1193 REJCIVOID(CI_ACCOMPRESSION, neg_accompression);
Michael J. Spencer 1:f5ac63519541 1194
Michael J. Spencer 1:f5ac63519541 1195 /*
Michael J. Spencer 1:f5ac63519541 1196 * If there are any remaining CIs, then this packet is bad.
Michael J. Spencer 1:f5ac63519541 1197 */
Michael J. Spencer 1:f5ac63519541 1198 if (len != 0) {
Michael J. Spencer 1:f5ac63519541 1199 goto bad;
Michael J. Spencer 1:f5ac63519541 1200 }
Michael J. Spencer 1:f5ac63519541 1201 /*
Michael J. Spencer 1:f5ac63519541 1202 * Now we can update state.
Michael J. Spencer 1:f5ac63519541 1203 */
Michael J. Spencer 1:f5ac63519541 1204 if (f->state != LS_OPENED) {
Michael J. Spencer 1:f5ac63519541 1205 *go = try;
Michael J. Spencer 1:f5ac63519541 1206 }
Michael J. Spencer 1:f5ac63519541 1207 return 1;
Michael J. Spencer 1:f5ac63519541 1208
Michael J. Spencer 1:f5ac63519541 1209 bad:
Michael J. Spencer 1:f5ac63519541 1210 LCPDEBUG(LOG_WARNING, ("lcp_rejci: received bad Reject!\n"));
Michael J. Spencer 1:f5ac63519541 1211 return 0;
Michael J. Spencer 1:f5ac63519541 1212 }
Michael J. Spencer 1:f5ac63519541 1213
Michael J. Spencer 1:f5ac63519541 1214
Michael J. Spencer 1:f5ac63519541 1215 /*
Michael J. Spencer 1:f5ac63519541 1216 * lcp_reqci - Check the peer's requested CIs and send appropriate response.
Michael J. Spencer 1:f5ac63519541 1217 *
Michael J. Spencer 1:f5ac63519541 1218 * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
Michael J. Spencer 1:f5ac63519541 1219 * appropriately. If reject_if_disagree is non-zero, doesn't return
Michael J. Spencer 1:f5ac63519541 1220 * CONFNAK; returns CONFREJ if it can't return CONFACK.
Michael J. Spencer 1:f5ac63519541 1221 */
Michael J. Spencer 1:f5ac63519541 1222 static int
Michael J. Spencer 1:f5ac63519541 1223 lcp_reqci(fsm *f,
Michael J. Spencer 1:f5ac63519541 1224 u_char *inp, /* Requested CIs */
Michael J. Spencer 1:f5ac63519541 1225 int *lenp, /* Length of requested CIs */
Michael J. Spencer 1:f5ac63519541 1226 int reject_if_disagree)
Michael J. Spencer 1:f5ac63519541 1227 {
Michael J. Spencer 1:f5ac63519541 1228 lcp_options *go = &lcp_gotoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 1229 lcp_options *ho = &lcp_hisoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 1230 lcp_options *ao = &lcp_allowoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 1231 u_char *cip, *next; /* Pointer to current and next CIs */
Michael J. Spencer 1:f5ac63519541 1232 int cilen, citype; /* Parsed len, type */
Michael J. Spencer 1:f5ac63519541 1233 u_char cichar; /* Parsed char value */
Michael J. Spencer 1:f5ac63519541 1234 u_short cishort; /* Parsed short value */
Michael J. Spencer 1:f5ac63519541 1235 u32_t cilong; /* Parse long value */
Michael J. Spencer 1:f5ac63519541 1236 int rc = CONFACK; /* Final packet return code */
Michael J. Spencer 1:f5ac63519541 1237 int orc; /* Individual option return code */
Michael J. Spencer 1:f5ac63519541 1238 u_char *p; /* Pointer to next char to parse */
Michael J. Spencer 1:f5ac63519541 1239 u_char *rejp; /* Pointer to next char in reject frame */
Michael J. Spencer 1:f5ac63519541 1240 u_char *nakp; /* Pointer to next char in Nak frame */
Michael J. Spencer 1:f5ac63519541 1241 int l = *lenp; /* Length left */
Michael J. Spencer 1:f5ac63519541 1242 #if TRACELCP > 0
Michael J. Spencer 1:f5ac63519541 1243 char traceBuf[80];
Michael J. Spencer 1:f5ac63519541 1244 size_t traceNdx = 0;
Michael J. Spencer 1:f5ac63519541 1245 #endif
Michael J. Spencer 1:f5ac63519541 1246
Michael J. Spencer 1:f5ac63519541 1247 /*
Michael J. Spencer 1:f5ac63519541 1248 * Reset all his options.
Michael J. Spencer 1:f5ac63519541 1249 */
Michael J. Spencer 1:f5ac63519541 1250 BZERO(ho, sizeof(*ho));
Michael J. Spencer 1:f5ac63519541 1251
Michael J. Spencer 1:f5ac63519541 1252 /*
Michael J. Spencer 1:f5ac63519541 1253 * Process all his options.
Michael J. Spencer 1:f5ac63519541 1254 */
Michael J. Spencer 1:f5ac63519541 1255 next = inp;
Michael J. Spencer 1:f5ac63519541 1256 nakp = nak_buffer;
Michael J. Spencer 1:f5ac63519541 1257 rejp = inp;
Michael J. Spencer 1:f5ac63519541 1258 while (l) {
Michael J. Spencer 1:f5ac63519541 1259 orc = CONFACK; /* Assume success */
Michael J. Spencer 1:f5ac63519541 1260 cip = p = next; /* Remember begining of CI */
Michael J. Spencer 1:f5ac63519541 1261 if (l < 2 || /* Not enough data for CI header or */
Michael J. Spencer 1:f5ac63519541 1262 p[1] < 2 || /* CI length too small or */
Michael J. Spencer 1:f5ac63519541 1263 p[1] > l) { /* CI length too big? */
Michael J. Spencer 1:f5ac63519541 1264 LCPDEBUG(LOG_WARNING, ("lcp_reqci: bad CI length!\n"));
Michael J. Spencer 1:f5ac63519541 1265 orc = CONFREJ; /* Reject bad CI */
Michael J. Spencer 1:f5ac63519541 1266 cilen = l; /* Reject till end of packet */
Michael J. Spencer 1:f5ac63519541 1267 l = 0; /* Don't loop again */
Michael J. Spencer 1:f5ac63519541 1268 citype = 0;
Michael J. Spencer 1:f5ac63519541 1269 goto endswitch;
Michael J. Spencer 1:f5ac63519541 1270 }
Michael J. Spencer 1:f5ac63519541 1271 GETCHAR(citype, p); /* Parse CI type */
Michael J. Spencer 1:f5ac63519541 1272 GETCHAR(cilen, p); /* Parse CI length */
Michael J. Spencer 1:f5ac63519541 1273 l -= cilen; /* Adjust remaining length */
Michael J. Spencer 1:f5ac63519541 1274 next += cilen; /* Step to next CI */
Michael J. Spencer 1:f5ac63519541 1275
Michael J. Spencer 1:f5ac63519541 1276 switch (citype) { /* Check CI type */
Michael J. Spencer 1:f5ac63519541 1277 case CI_MRU:
Michael J. Spencer 1:f5ac63519541 1278 if (!ao->neg_mru) { /* Allow option? */
Michael J. Spencer 1:f5ac63519541 1279 LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - not allowed\n"));
Michael J. Spencer 1:f5ac63519541 1280 orc = CONFREJ; /* Reject CI */
Michael J. Spencer 1:f5ac63519541 1281 break;
Michael J. Spencer 1:f5ac63519541 1282 } else if (cilen != CILEN_SHORT) { /* Check CI length */
Michael J. Spencer 1:f5ac63519541 1283 LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - bad length\n"));
Michael J. Spencer 1:f5ac63519541 1284 orc = CONFREJ; /* Reject CI */
Michael J. Spencer 1:f5ac63519541 1285 break;
Michael J. Spencer 1:f5ac63519541 1286 }
Michael J. Spencer 1:f5ac63519541 1287 GETSHORT(cishort, p); /* Parse MRU */
Michael J. Spencer 1:f5ac63519541 1288
Michael J. Spencer 1:f5ac63519541 1289 /*
Michael J. Spencer 1:f5ac63519541 1290 * He must be able to receive at least our minimum.
Michael J. Spencer 1:f5ac63519541 1291 * No need to check a maximum. If he sends a large number,
Michael J. Spencer 1:f5ac63519541 1292 * we'll just ignore it.
Michael J. Spencer 1:f5ac63519541 1293 */
Michael J. Spencer 1:f5ac63519541 1294 if (cishort < PPP_MINMRU) {
Michael J. Spencer 1:f5ac63519541 1295 LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak - MRU too small\n"));
Michael J. Spencer 1:f5ac63519541 1296 orc = CONFNAK; /* Nak CI */
Michael J. Spencer 1:f5ac63519541 1297 PUTCHAR(CI_MRU, nakp);
Michael J. Spencer 1:f5ac63519541 1298 PUTCHAR(CILEN_SHORT, nakp);
Michael J. Spencer 1:f5ac63519541 1299 PUTSHORT(PPP_MINMRU, nakp); /* Give him a hint */
Michael J. Spencer 1:f5ac63519541 1300 break;
Michael J. Spencer 1:f5ac63519541 1301 }
Michael J. Spencer 1:f5ac63519541 1302 ho->neg_mru = 1; /* Remember he sent MRU */
Michael J. Spencer 1:f5ac63519541 1303 ho->mru = cishort; /* And remember value */
Michael J. Spencer 1:f5ac63519541 1304 #if TRACELCP > 0
Michael J. Spencer 1:f5ac63519541 1305 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MRU %d", cishort);
Michael J. Spencer 1:f5ac63519541 1306 traceNdx = strlen(traceBuf);
Michael J. Spencer 1:f5ac63519541 1307 #endif
Michael J. Spencer 1:f5ac63519541 1308 break;
Michael J. Spencer 1:f5ac63519541 1309
Michael J. Spencer 1:f5ac63519541 1310 case CI_ASYNCMAP:
Michael J. Spencer 1:f5ac63519541 1311 if (!ao->neg_asyncmap) {
Michael J. Spencer 1:f5ac63519541 1312 LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP not allowed\n"));
Michael J. Spencer 1:f5ac63519541 1313 orc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1314 break;
Michael J. Spencer 1:f5ac63519541 1315 } else if (cilen != CILEN_LONG) {
Michael J. Spencer 1:f5ac63519541 1316 LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP bad length\n"));
Michael J. Spencer 1:f5ac63519541 1317 orc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1318 break;
Michael J. Spencer 1:f5ac63519541 1319 }
Michael J. Spencer 1:f5ac63519541 1320 GETLONG(cilong, p);
Michael J. Spencer 1:f5ac63519541 1321
Michael J. Spencer 1:f5ac63519541 1322 /*
Michael J. Spencer 1:f5ac63519541 1323 * Asyncmap must have set at least the bits
Michael J. Spencer 1:f5ac63519541 1324 * which are set in lcp_allowoptions[unit].asyncmap.
Michael J. Spencer 1:f5ac63519541 1325 */
Michael J. Spencer 1:f5ac63519541 1326 if ((ao->asyncmap & ~cilong) != 0) {
Michael J. Spencer 1:f5ac63519541 1327 LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak ASYNCMAP %lX missing %lX\n",
Michael J. Spencer 1:f5ac63519541 1328 cilong, ao->asyncmap));
Michael J. Spencer 1:f5ac63519541 1329 orc = CONFNAK;
Michael J. Spencer 1:f5ac63519541 1330 PUTCHAR(CI_ASYNCMAP, nakp);
Michael J. Spencer 1:f5ac63519541 1331 PUTCHAR(CILEN_LONG, nakp);
Michael J. Spencer 1:f5ac63519541 1332 PUTLONG(ao->asyncmap | cilong, nakp);
Michael J. Spencer 1:f5ac63519541 1333 break;
Michael J. Spencer 1:f5ac63519541 1334 }
Michael J. Spencer 1:f5ac63519541 1335 ho->neg_asyncmap = 1;
Michael J. Spencer 1:f5ac63519541 1336 ho->asyncmap = cilong;
Michael J. Spencer 1:f5ac63519541 1337 #if TRACELCP > 0
Michael J. Spencer 1:f5ac63519541 1338 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ASYNCMAP=%lX", cilong);
Michael J. Spencer 1:f5ac63519541 1339 traceNdx = strlen(traceBuf);
Michael J. Spencer 1:f5ac63519541 1340 #endif
Michael J. Spencer 1:f5ac63519541 1341 break;
Michael J. Spencer 1:f5ac63519541 1342
Michael J. Spencer 1:f5ac63519541 1343 case CI_AUTHTYPE:
Michael J. Spencer 1:f5ac63519541 1344 if (cilen < CILEN_SHORT) {
Michael J. Spencer 1:f5ac63519541 1345 LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE missing arg\n"));
Michael J. Spencer 1:f5ac63519541 1346 orc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1347 break;
Michael J. Spencer 1:f5ac63519541 1348 } else if (!(ao->neg_upap || ao->neg_chap)) {
Michael J. Spencer 1:f5ac63519541 1349 /*
Michael J. Spencer 1:f5ac63519541 1350 * Reject the option if we're not willing to authenticate.
Michael J. Spencer 1:f5ac63519541 1351 */
Michael J. Spencer 1:f5ac63519541 1352 LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE not allowed\n"));
Michael J. Spencer 1:f5ac63519541 1353 orc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1354 break;
Michael J. Spencer 1:f5ac63519541 1355 }
Michael J. Spencer 1:f5ac63519541 1356 GETSHORT(cishort, p);
Michael J. Spencer 1:f5ac63519541 1357
Michael J. Spencer 1:f5ac63519541 1358 /*
Michael J. Spencer 1:f5ac63519541 1359 * Authtype must be UPAP or CHAP.
Michael J. Spencer 1:f5ac63519541 1360 *
Michael J. Spencer 1:f5ac63519541 1361 * Note: if both ao->neg_upap and ao->neg_chap are set,
Michael J. Spencer 1:f5ac63519541 1362 * and the peer sends a Configure-Request with two
Michael J. Spencer 1:f5ac63519541 1363 * authenticate-protocol requests, one for CHAP and one
Michael J. Spencer 1:f5ac63519541 1364 * for UPAP, then we will reject the second request.
Michael J. Spencer 1:f5ac63519541 1365 * Whether we end up doing CHAP or UPAP depends then on
Michael J. Spencer 1:f5ac63519541 1366 * the ordering of the CIs in the peer's Configure-Request.
Michael J. Spencer 1:f5ac63519541 1367 */
Michael J. Spencer 1:f5ac63519541 1368
Michael J. Spencer 1:f5ac63519541 1369 if (cishort == PPP_PAP) {
Michael J. Spencer 1:f5ac63519541 1370 if (ho->neg_chap) { /* we've already accepted CHAP */
Michael J. Spencer 1:f5ac63519541 1371 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP already accepted\n"));
Michael J. Spencer 1:f5ac63519541 1372 orc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1373 break;
Michael J. Spencer 1:f5ac63519541 1374 } else if (cilen != CILEN_SHORT) {
Michael J. Spencer 1:f5ac63519541 1375 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP bad len\n"));
Michael J. Spencer 1:f5ac63519541 1376 orc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1377 break;
Michael J. Spencer 1:f5ac63519541 1378 }
Michael J. Spencer 1:f5ac63519541 1379 if (!ao->neg_upap) { /* we don't want to do PAP */
Michael J. Spencer 1:f5ac63519541 1380 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE PAP not allowed\n"));
Michael J. Spencer 1:f5ac63519541 1381 orc = CONFNAK; /* NAK it and suggest CHAP */
Michael J. Spencer 1:f5ac63519541 1382 PUTCHAR(CI_AUTHTYPE, nakp);
Michael J. Spencer 1:f5ac63519541 1383 PUTCHAR(CILEN_CHAP, nakp);
Michael J. Spencer 1:f5ac63519541 1384 PUTSHORT(PPP_CHAP, nakp);
Michael J. Spencer 1:f5ac63519541 1385 PUTCHAR(ao->chap_mdtype, nakp);
Michael J. Spencer 1:f5ac63519541 1386 break;
Michael J. Spencer 1:f5ac63519541 1387 }
Michael J. Spencer 1:f5ac63519541 1388 ho->neg_upap = 1;
Michael J. Spencer 1:f5ac63519541 1389 #if TRACELCP > 0
Michael J. Spencer 1:f5ac63519541 1390 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PAP (%X)", cishort);
Michael J. Spencer 1:f5ac63519541 1391 traceNdx = strlen(traceBuf);
Michael J. Spencer 1:f5ac63519541 1392 #endif
Michael J. Spencer 1:f5ac63519541 1393 break;
Michael J. Spencer 1:f5ac63519541 1394 }
Michael J. Spencer 1:f5ac63519541 1395 if (cishort == PPP_CHAP) {
Michael J. Spencer 1:f5ac63519541 1396 if (ho->neg_upap) { /* we've already accepted PAP */
Michael J. Spencer 1:f5ac63519541 1397 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP accepted PAP\n"));
Michael J. Spencer 1:f5ac63519541 1398 orc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1399 break;
Michael J. Spencer 1:f5ac63519541 1400 } else if (cilen != CILEN_CHAP) {
Michael J. Spencer 1:f5ac63519541 1401 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP bad len\n"));
Michael J. Spencer 1:f5ac63519541 1402 orc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1403 break;
Michael J. Spencer 1:f5ac63519541 1404 }
Michael J. Spencer 1:f5ac63519541 1405 if (!ao->neg_chap) { /* we don't want to do CHAP */
Michael J. Spencer 1:f5ac63519541 1406 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP not allowed\n"));
Michael J. Spencer 1:f5ac63519541 1407 orc = CONFNAK; /* NAK it and suggest PAP */
Michael J. Spencer 1:f5ac63519541 1408 PUTCHAR(CI_AUTHTYPE, nakp);
Michael J. Spencer 1:f5ac63519541 1409 PUTCHAR(CILEN_SHORT, nakp);
Michael J. Spencer 1:f5ac63519541 1410 PUTSHORT(PPP_PAP, nakp);
Michael J. Spencer 1:f5ac63519541 1411 break;
Michael J. Spencer 1:f5ac63519541 1412 }
Michael J. Spencer 1:f5ac63519541 1413 GETCHAR(cichar, p); /* get digest type*/
Michael J. Spencer 1:f5ac63519541 1414 if (cichar != CHAP_DIGEST_MD5
Michael J. Spencer 1:f5ac63519541 1415 #if MSCHAP_SUPPORT
Michael J. Spencer 1:f5ac63519541 1416 && cichar != CHAP_MICROSOFT
Michael J. Spencer 1:f5ac63519541 1417 #endif
Michael J. Spencer 1:f5ac63519541 1418 ) {
Michael J. Spencer 1:f5ac63519541 1419 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP digest=%d\n", (int)cichar));
Michael J. Spencer 1:f5ac63519541 1420 orc = CONFNAK;
Michael J. Spencer 1:f5ac63519541 1421 PUTCHAR(CI_AUTHTYPE, nakp);
Michael J. Spencer 1:f5ac63519541 1422 PUTCHAR(CILEN_CHAP, nakp);
Michael J. Spencer 1:f5ac63519541 1423 PUTSHORT(PPP_CHAP, nakp);
Michael J. Spencer 1:f5ac63519541 1424 PUTCHAR(ao->chap_mdtype, nakp);
Michael J. Spencer 1:f5ac63519541 1425 break;
Michael J. Spencer 1:f5ac63519541 1426 }
Michael J. Spencer 1:f5ac63519541 1427 #if TRACELCP > 0
Michael J. Spencer 1:f5ac63519541 1428 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CHAP %X,%d", cishort, (int)cichar);
Michael J. Spencer 1:f5ac63519541 1429 traceNdx = strlen(traceBuf);
Michael J. Spencer 1:f5ac63519541 1430 #endif
Michael J. Spencer 1:f5ac63519541 1431 ho->chap_mdtype = cichar; /* save md type */
Michael J. Spencer 1:f5ac63519541 1432 ho->neg_chap = 1;
Michael J. Spencer 1:f5ac63519541 1433 break;
Michael J. Spencer 1:f5ac63519541 1434 }
Michael J. Spencer 1:f5ac63519541 1435
Michael J. Spencer 1:f5ac63519541 1436 /*
Michael J. Spencer 1:f5ac63519541 1437 * We don't recognize the protocol they're asking for.
Michael J. Spencer 1:f5ac63519541 1438 * Nak it with something we're willing to do.
Michael J. Spencer 1:f5ac63519541 1439 * (At this point we know ao->neg_upap || ao->neg_chap.)
Michael J. Spencer 1:f5ac63519541 1440 */
Michael J. Spencer 1:f5ac63519541 1441 orc = CONFNAK;
Michael J. Spencer 1:f5ac63519541 1442 PUTCHAR(CI_AUTHTYPE, nakp);
Michael J. Spencer 1:f5ac63519541 1443 if (ao->neg_chap) {
Michael J. Spencer 1:f5ac63519541 1444 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req CHAP\n", cishort));
Michael J. Spencer 1:f5ac63519541 1445 PUTCHAR(CILEN_CHAP, nakp);
Michael J. Spencer 1:f5ac63519541 1446 PUTSHORT(PPP_CHAP, nakp);
Michael J. Spencer 1:f5ac63519541 1447 PUTCHAR(ao->chap_mdtype, nakp);
Michael J. Spencer 1:f5ac63519541 1448 } else {
Michael J. Spencer 1:f5ac63519541 1449 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req PAP\n", cishort));
Michael J. Spencer 1:f5ac63519541 1450 PUTCHAR(CILEN_SHORT, nakp);
Michael J. Spencer 1:f5ac63519541 1451 PUTSHORT(PPP_PAP, nakp);
Michael J. Spencer 1:f5ac63519541 1452 }
Michael J. Spencer 1:f5ac63519541 1453 break;
Michael J. Spencer 1:f5ac63519541 1454
Michael J. Spencer 1:f5ac63519541 1455 case CI_QUALITY:
Michael J. Spencer 1:f5ac63519541 1456 GETSHORT(cishort, p);
Michael J. Spencer 1:f5ac63519541 1457 GETLONG(cilong, p);
Michael J. Spencer 1:f5ac63519541 1458 #if TRACELCP > 0
Michael J. Spencer 1:f5ac63519541 1459 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " QUALITY (%x %x)", cishort, (unsigned int) cilong);
Michael J. Spencer 1:f5ac63519541 1460 traceNdx = strlen(traceBuf);
Michael J. Spencer 1:f5ac63519541 1461 #endif
Michael J. Spencer 1:f5ac63519541 1462
Michael J. Spencer 1:f5ac63519541 1463 if (!ao->neg_lqr ||
Michael J. Spencer 1:f5ac63519541 1464 cilen != CILEN_LQR) {
Michael J. Spencer 1:f5ac63519541 1465 orc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1466 break;
Michael J. Spencer 1:f5ac63519541 1467 }
Michael J. Spencer 1:f5ac63519541 1468
Michael J. Spencer 1:f5ac63519541 1469 /*
Michael J. Spencer 1:f5ac63519541 1470 * Check the protocol and the reporting period.
Michael J. Spencer 1:f5ac63519541 1471 * XXX When should we Nak this, and what with?
Michael J. Spencer 1:f5ac63519541 1472 */
Michael J. Spencer 1:f5ac63519541 1473 if (cishort != PPP_LQR) {
Michael J. Spencer 1:f5ac63519541 1474 orc = CONFNAK;
Michael J. Spencer 1:f5ac63519541 1475 PUTCHAR(CI_QUALITY, nakp);
Michael J. Spencer 1:f5ac63519541 1476 PUTCHAR(CILEN_LQR, nakp);
Michael J. Spencer 1:f5ac63519541 1477 PUTSHORT(PPP_LQR, nakp);
Michael J. Spencer 1:f5ac63519541 1478 PUTLONG(ao->lqr_period, nakp);
Michael J. Spencer 1:f5ac63519541 1479 break;
Michael J. Spencer 1:f5ac63519541 1480 }
Michael J. Spencer 1:f5ac63519541 1481 break;
Michael J. Spencer 1:f5ac63519541 1482
Michael J. Spencer 1:f5ac63519541 1483 case CI_MAGICNUMBER:
Michael J. Spencer 1:f5ac63519541 1484 if (!(ao->neg_magicnumber || go->neg_magicnumber) ||
Michael J. Spencer 1:f5ac63519541 1485 cilen != CILEN_LONG) {
Michael J. Spencer 1:f5ac63519541 1486 orc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1487 break;
Michael J. Spencer 1:f5ac63519541 1488 }
Michael J. Spencer 1:f5ac63519541 1489 GETLONG(cilong, p);
Michael J. Spencer 1:f5ac63519541 1490 #if TRACELCP > 0
Michael J. Spencer 1:f5ac63519541 1491 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MAGICNUMBER (%lX)", cilong);
Michael J. Spencer 1:f5ac63519541 1492 traceNdx = strlen(traceBuf);
Michael J. Spencer 1:f5ac63519541 1493 #endif
Michael J. Spencer 1:f5ac63519541 1494
Michael J. Spencer 1:f5ac63519541 1495 /*
Michael J. Spencer 1:f5ac63519541 1496 * He must have a different magic number.
Michael J. Spencer 1:f5ac63519541 1497 */
Michael J. Spencer 1:f5ac63519541 1498 if (go->neg_magicnumber &&
Michael J. Spencer 1:f5ac63519541 1499 cilong == go->magicnumber) {
Michael J. Spencer 1:f5ac63519541 1500 cilong = magic(); /* Don't put magic() inside macro! */
Michael J. Spencer 1:f5ac63519541 1501 orc = CONFNAK;
Michael J. Spencer 1:f5ac63519541 1502 PUTCHAR(CI_MAGICNUMBER, nakp);
Michael J. Spencer 1:f5ac63519541 1503 PUTCHAR(CILEN_LONG, nakp);
Michael J. Spencer 1:f5ac63519541 1504 PUTLONG(cilong, nakp);
Michael J. Spencer 1:f5ac63519541 1505 break;
Michael J. Spencer 1:f5ac63519541 1506 }
Michael J. Spencer 1:f5ac63519541 1507 ho->neg_magicnumber = 1;
Michael J. Spencer 1:f5ac63519541 1508 ho->magicnumber = cilong;
Michael J. Spencer 1:f5ac63519541 1509 break;
Michael J. Spencer 1:f5ac63519541 1510
Michael J. Spencer 1:f5ac63519541 1511
Michael J. Spencer 1:f5ac63519541 1512 case CI_PCOMPRESSION:
Michael J. Spencer 1:f5ac63519541 1513 #if TRACELCP > 0
Michael J. Spencer 1:f5ac63519541 1514 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PCOMPRESSION");
Michael J. Spencer 1:f5ac63519541 1515 traceNdx = strlen(traceBuf);
Michael J. Spencer 1:f5ac63519541 1516 #endif
Michael J. Spencer 1:f5ac63519541 1517 if (!ao->neg_pcompression ||
Michael J. Spencer 1:f5ac63519541 1518 cilen != CILEN_VOID) {
Michael J. Spencer 1:f5ac63519541 1519 orc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1520 break;
Michael J. Spencer 1:f5ac63519541 1521 }
Michael J. Spencer 1:f5ac63519541 1522 ho->neg_pcompression = 1;
Michael J. Spencer 1:f5ac63519541 1523 break;
Michael J. Spencer 1:f5ac63519541 1524
Michael J. Spencer 1:f5ac63519541 1525 case CI_ACCOMPRESSION:
Michael J. Spencer 1:f5ac63519541 1526 #if TRACELCP > 0
Michael J. Spencer 1:f5ac63519541 1527 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ACCOMPRESSION");
Michael J. Spencer 1:f5ac63519541 1528 traceNdx = strlen(traceBuf);
Michael J. Spencer 1:f5ac63519541 1529 #endif
Michael J. Spencer 1:f5ac63519541 1530 if (!ao->neg_accompression ||
Michael J. Spencer 1:f5ac63519541 1531 cilen != CILEN_VOID) {
Michael J. Spencer 1:f5ac63519541 1532 orc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1533 break;
Michael J. Spencer 1:f5ac63519541 1534 }
Michael J. Spencer 1:f5ac63519541 1535 ho->neg_accompression = 1;
Michael J. Spencer 1:f5ac63519541 1536 break;
Michael J. Spencer 1:f5ac63519541 1537
Michael J. Spencer 1:f5ac63519541 1538 case CI_MRRU:
Michael J. Spencer 1:f5ac63519541 1539 #if TRACELCP > 0
Michael J. Spencer 1:f5ac63519541 1540 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_MRRU");
Michael J. Spencer 1:f5ac63519541 1541 traceNdx = strlen(traceBuf);
Michael J. Spencer 1:f5ac63519541 1542 #endif
Michael J. Spencer 1:f5ac63519541 1543 orc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1544 break;
Michael J. Spencer 1:f5ac63519541 1545
Michael J. Spencer 1:f5ac63519541 1546 case CI_SSNHF:
Michael J. Spencer 1:f5ac63519541 1547 #if TRACELCP > 0
Michael J. Spencer 1:f5ac63519541 1548 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_SSNHF");
Michael J. Spencer 1:f5ac63519541 1549 traceNdx = strlen(traceBuf);
Michael J. Spencer 1:f5ac63519541 1550 #endif
Michael J. Spencer 1:f5ac63519541 1551 orc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1552 break;
Michael J. Spencer 1:f5ac63519541 1553
Michael J. Spencer 1:f5ac63519541 1554 case CI_EPDISC:
Michael J. Spencer 1:f5ac63519541 1555 #if TRACELCP > 0
Michael J. Spencer 1:f5ac63519541 1556 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_EPDISC");
Michael J. Spencer 1:f5ac63519541 1557 traceNdx = strlen(traceBuf);
Michael J. Spencer 1:f5ac63519541 1558 #endif
Michael J. Spencer 1:f5ac63519541 1559 orc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1560 break;
Michael J. Spencer 1:f5ac63519541 1561
Michael J. Spencer 1:f5ac63519541 1562 default:
Michael J. Spencer 1:f5ac63519541 1563 #if TRACELCP
Michael J. Spencer 1:f5ac63519541 1564 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " unknown %d", citype);
Michael J. Spencer 1:f5ac63519541 1565 traceNdx = strlen(traceBuf);
Michael J. Spencer 1:f5ac63519541 1566 #endif
Michael J. Spencer 1:f5ac63519541 1567 orc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1568 break;
Michael J. Spencer 1:f5ac63519541 1569 }
Michael J. Spencer 1:f5ac63519541 1570
Michael J. Spencer 1:f5ac63519541 1571 endswitch:
Michael J. Spencer 1:f5ac63519541 1572 #if TRACELCP
Michael J. Spencer 1:f5ac63519541 1573 if (traceNdx >= 80 - 32) {
Michael J. Spencer 1:f5ac63519541 1574 LCPDEBUG(LOG_INFO, ("lcp_reqci: rcvd%s\n", traceBuf));
Michael J. Spencer 1:f5ac63519541 1575 traceNdx = 0;
Michael J. Spencer 1:f5ac63519541 1576 }
Michael J. Spencer 1:f5ac63519541 1577 #endif
Michael J. Spencer 1:f5ac63519541 1578 if (orc == CONFACK && /* Good CI */
Michael J. Spencer 1:f5ac63519541 1579 rc != CONFACK) { /* but prior CI wasnt? */
Michael J. Spencer 1:f5ac63519541 1580 continue; /* Don't send this one */
Michael J. Spencer 1:f5ac63519541 1581 }
Michael J. Spencer 1:f5ac63519541 1582
Michael J. Spencer 1:f5ac63519541 1583 if (orc == CONFNAK) { /* Nak this CI? */
Michael J. Spencer 1:f5ac63519541 1584 if (reject_if_disagree /* Getting fed up with sending NAKs? */
Michael J. Spencer 1:f5ac63519541 1585 && citype != CI_MAGICNUMBER) {
Michael J. Spencer 1:f5ac63519541 1586 orc = CONFREJ; /* Get tough if so */
Michael J. Spencer 1:f5ac63519541 1587 } else {
Michael J. Spencer 1:f5ac63519541 1588 if (rc == CONFREJ) { /* Rejecting prior CI? */
Michael J. Spencer 1:f5ac63519541 1589 continue; /* Don't send this one */
Michael J. Spencer 1:f5ac63519541 1590 }
Michael J. Spencer 1:f5ac63519541 1591 rc = CONFNAK;
Michael J. Spencer 1:f5ac63519541 1592 }
Michael J. Spencer 1:f5ac63519541 1593 }
Michael J. Spencer 1:f5ac63519541 1594 if (orc == CONFREJ) { /* Reject this CI */
Michael J. Spencer 1:f5ac63519541 1595 rc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1596 if (cip != rejp) { /* Need to move rejected CI? */
Michael J. Spencer 1:f5ac63519541 1597 BCOPY(cip, rejp, cilen); /* Move it */
Michael J. Spencer 1:f5ac63519541 1598 }
Michael J. Spencer 1:f5ac63519541 1599 INCPTR(cilen, rejp); /* Update output pointer */
Michael J. Spencer 1:f5ac63519541 1600 }
Michael J. Spencer 1:f5ac63519541 1601 }
Michael J. Spencer 1:f5ac63519541 1602
Michael J. Spencer 1:f5ac63519541 1603 /*
Michael J. Spencer 1:f5ac63519541 1604 * If we wanted to send additional NAKs (for unsent CIs), the
Michael J. Spencer 1:f5ac63519541 1605 * code would go here. The extra NAKs would go at *nakp.
Michael J. Spencer 1:f5ac63519541 1606 * At present there are no cases where we want to ask the
Michael J. Spencer 1:f5ac63519541 1607 * peer to negotiate an option.
Michael J. Spencer 1:f5ac63519541 1608 */
Michael J. Spencer 1:f5ac63519541 1609
Michael J. Spencer 1:f5ac63519541 1610 switch (rc) {
Michael J. Spencer 1:f5ac63519541 1611 case CONFACK:
Michael J. Spencer 1:f5ac63519541 1612 *lenp = (int)(next - inp);
Michael J. Spencer 1:f5ac63519541 1613 break;
Michael J. Spencer 1:f5ac63519541 1614 case CONFNAK:
Michael J. Spencer 1:f5ac63519541 1615 /*
Michael J. Spencer 1:f5ac63519541 1616 * Copy the Nak'd options from the nak_buffer to the caller's buffer.
Michael J. Spencer 1:f5ac63519541 1617 */
Michael J. Spencer 1:f5ac63519541 1618 *lenp = (int)(nakp - nak_buffer);
Michael J. Spencer 1:f5ac63519541 1619 BCOPY(nak_buffer, inp, *lenp);
Michael J. Spencer 1:f5ac63519541 1620 break;
Michael J. Spencer 1:f5ac63519541 1621 case CONFREJ:
Michael J. Spencer 1:f5ac63519541 1622 *lenp = (int)(rejp - inp);
Michael J. Spencer 1:f5ac63519541 1623 break;
Michael J. Spencer 1:f5ac63519541 1624 }
Michael J. Spencer 1:f5ac63519541 1625
Michael J. Spencer 1:f5ac63519541 1626 #if TRACELCP > 0
Michael J. Spencer 1:f5ac63519541 1627 if (traceNdx > 0) {
Michael J. Spencer 1:f5ac63519541 1628 LCPDEBUG(LOG_INFO, ("lcp_reqci: %s\n", traceBuf));
Michael J. Spencer 1:f5ac63519541 1629 }
Michael J. Spencer 1:f5ac63519541 1630 #endif
Michael J. Spencer 1:f5ac63519541 1631 LCPDEBUG(LOG_INFO, ("lcp_reqci: returning CONF%s.\n", CODENAME(rc)));
Michael J. Spencer 1:f5ac63519541 1632 return (rc); /* Return final code */
Michael J. Spencer 1:f5ac63519541 1633 }
Michael J. Spencer 1:f5ac63519541 1634
Michael J. Spencer 1:f5ac63519541 1635
Michael J. Spencer 1:f5ac63519541 1636 /*
Michael J. Spencer 1:f5ac63519541 1637 * lcp_up - LCP has come UP.
Michael J. Spencer 1:f5ac63519541 1638 */
Michael J. Spencer 1:f5ac63519541 1639 static void
Michael J. Spencer 1:f5ac63519541 1640 lcp_up(fsm *f)
Michael J. Spencer 1:f5ac63519541 1641 {
Michael J. Spencer 1:f5ac63519541 1642 lcp_options *wo = &lcp_wantoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 1643 lcp_options *ho = &lcp_hisoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 1644 lcp_options *go = &lcp_gotoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 1645 lcp_options *ao = &lcp_allowoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 1646
Michael J. Spencer 1:f5ac63519541 1647 if (!go->neg_magicnumber) {
Michael J. Spencer 1:f5ac63519541 1648 go->magicnumber = 0;
Michael J. Spencer 1:f5ac63519541 1649 }
Michael J. Spencer 1:f5ac63519541 1650 if (!ho->neg_magicnumber) {
Michael J. Spencer 1:f5ac63519541 1651 ho->magicnumber = 0;
Michael J. Spencer 1:f5ac63519541 1652 }
Michael J. Spencer 1:f5ac63519541 1653
Michael J. Spencer 1:f5ac63519541 1654 /*
Michael J. Spencer 1:f5ac63519541 1655 * Set our MTU to the smaller of the MTU we wanted and
Michael J. Spencer 1:f5ac63519541 1656 * the MRU our peer wanted. If we negotiated an MRU,
Michael J. Spencer 1:f5ac63519541 1657 * set our MRU to the larger of value we wanted and
Michael J. Spencer 1:f5ac63519541 1658 * the value we got in the negotiation.
Michael J. Spencer 1:f5ac63519541 1659 */
Michael J. Spencer 1:f5ac63519541 1660 ppp_send_config(f->unit, LWIP_MIN(ao->mru, (ho->neg_mru? ho->mru: PPP_MRU)),
Michael J. Spencer 1:f5ac63519541 1661 (ho->neg_asyncmap? ho->asyncmap: 0xffffffffl),
Michael J. Spencer 1:f5ac63519541 1662 ho->neg_pcompression, ho->neg_accompression);
Michael J. Spencer 1:f5ac63519541 1663 /*
Michael J. Spencer 1:f5ac63519541 1664 * If the asyncmap hasn't been negotiated, we really should
Michael J. Spencer 1:f5ac63519541 1665 * set the receive asyncmap to ffffffff, but we set it to 0
Michael J. Spencer 1:f5ac63519541 1666 * for backwards contemptibility.
Michael J. Spencer 1:f5ac63519541 1667 */
Michael J. Spencer 1:f5ac63519541 1668 ppp_recv_config(f->unit, (go->neg_mru? LWIP_MAX(wo->mru, go->mru): PPP_MRU),
Michael J. Spencer 1:f5ac63519541 1669 (go->neg_asyncmap? go->asyncmap: 0x00000000),
Michael J. Spencer 1:f5ac63519541 1670 go->neg_pcompression, go->neg_accompression);
Michael J. Spencer 1:f5ac63519541 1671
Michael J. Spencer 1:f5ac63519541 1672 if (ho->neg_mru) {
Michael J. Spencer 1:f5ac63519541 1673 peer_mru[f->unit] = ho->mru;
Michael J. Spencer 1:f5ac63519541 1674 }
Michael J. Spencer 1:f5ac63519541 1675
Michael J. Spencer 1:f5ac63519541 1676 lcp_echo_lowerup(f->unit); /* Enable echo messages */
Michael J. Spencer 1:f5ac63519541 1677
Michael J. Spencer 1:f5ac63519541 1678 link_established(f->unit); /* The link is up; authenticate now */
Michael J. Spencer 1:f5ac63519541 1679 }
Michael J. Spencer 1:f5ac63519541 1680
Michael J. Spencer 1:f5ac63519541 1681
Michael J. Spencer 1:f5ac63519541 1682 /*
Michael J. Spencer 1:f5ac63519541 1683 * lcp_down - LCP has gone DOWN.
Michael J. Spencer 1:f5ac63519541 1684 *
Michael J. Spencer 1:f5ac63519541 1685 * Alert other protocols.
Michael J. Spencer 1:f5ac63519541 1686 */
Michael J. Spencer 1:f5ac63519541 1687 static void
Michael J. Spencer 1:f5ac63519541 1688 lcp_down(fsm *f)
Michael J. Spencer 1:f5ac63519541 1689 {
Michael J. Spencer 1:f5ac63519541 1690 lcp_options *go = &lcp_gotoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 1691
Michael J. Spencer 1:f5ac63519541 1692 lcp_echo_lowerdown(f->unit);
Michael J. Spencer 1:f5ac63519541 1693
Michael J. Spencer 1:f5ac63519541 1694 link_down(f->unit);
Michael J. Spencer 1:f5ac63519541 1695
Michael J. Spencer 1:f5ac63519541 1696 ppp_send_config(f->unit, PPP_MRU, 0xffffffffl, 0, 0);
Michael J. Spencer 1:f5ac63519541 1697 ppp_recv_config(f->unit, PPP_MRU,
Michael J. Spencer 1:f5ac63519541 1698 (go->neg_asyncmap? go->asyncmap: 0x00000000),
Michael J. Spencer 1:f5ac63519541 1699 go->neg_pcompression, go->neg_accompression);
Michael J. Spencer 1:f5ac63519541 1700 peer_mru[f->unit] = PPP_MRU;
Michael J. Spencer 1:f5ac63519541 1701 }
Michael J. Spencer 1:f5ac63519541 1702
Michael J. Spencer 1:f5ac63519541 1703
Michael J. Spencer 1:f5ac63519541 1704 /*
Michael J. Spencer 1:f5ac63519541 1705 * lcp_starting - LCP needs the lower layer up.
Michael J. Spencer 1:f5ac63519541 1706 */
Michael J. Spencer 1:f5ac63519541 1707 static void
Michael J. Spencer 1:f5ac63519541 1708 lcp_starting(fsm *f)
Michael J. Spencer 1:f5ac63519541 1709 {
Michael J. Spencer 1:f5ac63519541 1710 link_required(f->unit); /* lwip: currently does nothing */
Michael J. Spencer 1:f5ac63519541 1711 }
Michael J. Spencer 1:f5ac63519541 1712
Michael J. Spencer 1:f5ac63519541 1713
Michael J. Spencer 1:f5ac63519541 1714 /*
Michael J. Spencer 1:f5ac63519541 1715 * lcp_finished - LCP has finished with the lower layer.
Michael J. Spencer 1:f5ac63519541 1716 */
Michael J. Spencer 1:f5ac63519541 1717 static void
Michael J. Spencer 1:f5ac63519541 1718 lcp_finished(fsm *f)
Michael J. Spencer 1:f5ac63519541 1719 {
Michael J. Spencer 1:f5ac63519541 1720 link_terminated(f->unit); /* we are finished with the link */
Michael J. Spencer 1:f5ac63519541 1721 }
Michael J. Spencer 1:f5ac63519541 1722
Michael J. Spencer 1:f5ac63519541 1723
Michael J. Spencer 1:f5ac63519541 1724 #if PPP_ADDITIONAL_CALLBACKS
Michael J. Spencer 1:f5ac63519541 1725 /*
Michael J. Spencer 1:f5ac63519541 1726 * print_string - print a readable representation of a string using
Michael J. Spencer 1:f5ac63519541 1727 * printer.
Michael J. Spencer 1:f5ac63519541 1728 */
Michael J. Spencer 1:f5ac63519541 1729 static void
Michael J. Spencer 1:f5ac63519541 1730 print_string( char *p, int len, void (*printer) (void *, char *, ...), void *arg)
Michael J. Spencer 1:f5ac63519541 1731 {
Michael J. Spencer 1:f5ac63519541 1732 int c;
Michael J. Spencer 1:f5ac63519541 1733
Michael J. Spencer 1:f5ac63519541 1734 printer(arg, "\"");
Michael J. Spencer 1:f5ac63519541 1735 for (; len > 0; --len) {
Michael J. Spencer 1:f5ac63519541 1736 c = *p++;
Michael J. Spencer 1:f5ac63519541 1737 if (' ' <= c && c <= '~') {
Michael J. Spencer 1:f5ac63519541 1738 if (c == '\\' || c == '"') {
Michael J. Spencer 1:f5ac63519541 1739 printer(arg, "\\");
Michael J. Spencer 1:f5ac63519541 1740 }
Michael J. Spencer 1:f5ac63519541 1741 printer(arg, "%c", c);
Michael J. Spencer 1:f5ac63519541 1742 } else {
Michael J. Spencer 1:f5ac63519541 1743 switch (c) {
Michael J. Spencer 1:f5ac63519541 1744 case '\n':
Michael J. Spencer 1:f5ac63519541 1745 printer(arg, "\\n");
Michael J. Spencer 1:f5ac63519541 1746 break;
Michael J. Spencer 1:f5ac63519541 1747 case '\r':
Michael J. Spencer 1:f5ac63519541 1748 printer(arg, "\\r");
Michael J. Spencer 1:f5ac63519541 1749 break;
Michael J. Spencer 1:f5ac63519541 1750 case '\t':
Michael J. Spencer 1:f5ac63519541 1751 printer(arg, "\\t");
Michael J. Spencer 1:f5ac63519541 1752 break;
Michael J. Spencer 1:f5ac63519541 1753 default:
Michael J. Spencer 1:f5ac63519541 1754 printer(arg, "\\%.3o", c);
Michael J. Spencer 1:f5ac63519541 1755 }
Michael J. Spencer 1:f5ac63519541 1756 }
Michael J. Spencer 1:f5ac63519541 1757 }
Michael J. Spencer 1:f5ac63519541 1758 printer(arg, "\"");
Michael J. Spencer 1:f5ac63519541 1759 }
Michael J. Spencer 1:f5ac63519541 1760
Michael J. Spencer 1:f5ac63519541 1761
Michael J. Spencer 1:f5ac63519541 1762 /*
Michael J. Spencer 1:f5ac63519541 1763 * lcp_printpkt - print the contents of an LCP packet.
Michael J. Spencer 1:f5ac63519541 1764 */
Michael J. Spencer 1:f5ac63519541 1765 static char *lcp_codenames[] = {
Michael J. Spencer 1:f5ac63519541 1766 "ConfReq", "ConfAck", "ConfNak", "ConfRej",
Michael J. Spencer 1:f5ac63519541 1767 "TermReq", "TermAck", "CodeRej", "ProtRej",
Michael J. Spencer 1:f5ac63519541 1768 "EchoReq", "EchoRep", "DiscReq"
Michael J. Spencer 1:f5ac63519541 1769 };
Michael J. Spencer 1:f5ac63519541 1770
Michael J. Spencer 1:f5ac63519541 1771 static int
Michael J. Spencer 1:f5ac63519541 1772 lcp_printpkt( u_char *p, int plen, void (*printer) (void *, char *, ...), void *arg)
Michael J. Spencer 1:f5ac63519541 1773 {
Michael J. Spencer 1:f5ac63519541 1774 int code, id, len, olen;
Michael J. Spencer 1:f5ac63519541 1775 u_char *pstart, *optend;
Michael J. Spencer 1:f5ac63519541 1776 u_short cishort;
Michael J. Spencer 1:f5ac63519541 1777 u32_t cilong;
Michael J. Spencer 1:f5ac63519541 1778
Michael J. Spencer 1:f5ac63519541 1779 if (plen < HEADERLEN) {
Michael J. Spencer 1:f5ac63519541 1780 return 0;
Michael J. Spencer 1:f5ac63519541 1781 }
Michael J. Spencer 1:f5ac63519541 1782 pstart = p;
Michael J. Spencer 1:f5ac63519541 1783 GETCHAR(code, p);
Michael J. Spencer 1:f5ac63519541 1784 GETCHAR(id, p);
Michael J. Spencer 1:f5ac63519541 1785 GETSHORT(len, p);
Michael J. Spencer 1:f5ac63519541 1786 if (len < HEADERLEN || len > plen) {
Michael J. Spencer 1:f5ac63519541 1787 return 0;
Michael J. Spencer 1:f5ac63519541 1788 }
Michael J. Spencer 1:f5ac63519541 1789
Michael J. Spencer 1:f5ac63519541 1790 if (code >= 1 && code <= sizeof(lcp_codenames) / sizeof(char *)) {
Michael J. Spencer 1:f5ac63519541 1791 printer(arg, " %s", lcp_codenames[code-1]);
Michael J. Spencer 1:f5ac63519541 1792 } else {
Michael J. Spencer 1:f5ac63519541 1793 printer(arg, " code=0x%x", code);
Michael J. Spencer 1:f5ac63519541 1794 }
Michael J. Spencer 1:f5ac63519541 1795 printer(arg, " id=0x%x", id);
Michael J. Spencer 1:f5ac63519541 1796 len -= HEADERLEN;
Michael J. Spencer 1:f5ac63519541 1797 switch (code) {
Michael J. Spencer 1:f5ac63519541 1798 case CONFREQ:
Michael J. Spencer 1:f5ac63519541 1799 case CONFACK:
Michael J. Spencer 1:f5ac63519541 1800 case CONFNAK:
Michael J. Spencer 1:f5ac63519541 1801 case CONFREJ:
Michael J. Spencer 1:f5ac63519541 1802 /* print option list */
Michael J. Spencer 1:f5ac63519541 1803 while (len >= 2) {
Michael J. Spencer 1:f5ac63519541 1804 GETCHAR(code, p);
Michael J. Spencer 1:f5ac63519541 1805 GETCHAR(olen, p);
Michael J. Spencer 1:f5ac63519541 1806 p -= 2;
Michael J. Spencer 1:f5ac63519541 1807 if (olen < 2 || olen > len) {
Michael J. Spencer 1:f5ac63519541 1808 break;
Michael J. Spencer 1:f5ac63519541 1809 }
Michael J. Spencer 1:f5ac63519541 1810 printer(arg, " <");
Michael J. Spencer 1:f5ac63519541 1811 len -= olen;
Michael J. Spencer 1:f5ac63519541 1812 optend = p + olen;
Michael J. Spencer 1:f5ac63519541 1813 switch (code) {
Michael J. Spencer 1:f5ac63519541 1814 case CI_MRU:
Michael J. Spencer 1:f5ac63519541 1815 if (olen == CILEN_SHORT) {
Michael J. Spencer 1:f5ac63519541 1816 p += 2;
Michael J. Spencer 1:f5ac63519541 1817 GETSHORT(cishort, p);
Michael J. Spencer 1:f5ac63519541 1818 printer(arg, "mru %d", cishort);
Michael J. Spencer 1:f5ac63519541 1819 }
Michael J. Spencer 1:f5ac63519541 1820 break;
Michael J. Spencer 1:f5ac63519541 1821 case CI_ASYNCMAP:
Michael J. Spencer 1:f5ac63519541 1822 if (olen == CILEN_LONG) {
Michael J. Spencer 1:f5ac63519541 1823 p += 2;
Michael J. Spencer 1:f5ac63519541 1824 GETLONG(cilong, p);
Michael J. Spencer 1:f5ac63519541 1825 printer(arg, "asyncmap 0x%lx", cilong);
Michael J. Spencer 1:f5ac63519541 1826 }
Michael J. Spencer 1:f5ac63519541 1827 break;
Michael J. Spencer 1:f5ac63519541 1828 case CI_AUTHTYPE:
Michael J. Spencer 1:f5ac63519541 1829 if (olen >= CILEN_SHORT) {
Michael J. Spencer 1:f5ac63519541 1830 p += 2;
Michael J. Spencer 1:f5ac63519541 1831 printer(arg, "auth ");
Michael J. Spencer 1:f5ac63519541 1832 GETSHORT(cishort, p);
Michael J. Spencer 1:f5ac63519541 1833 switch (cishort) {
Michael J. Spencer 1:f5ac63519541 1834 case PPP_PAP:
Michael J. Spencer 1:f5ac63519541 1835 printer(arg, "pap");
Michael J. Spencer 1:f5ac63519541 1836 break;
Michael J. Spencer 1:f5ac63519541 1837 case PPP_CHAP:
Michael J. Spencer 1:f5ac63519541 1838 printer(arg, "chap");
Michael J. Spencer 1:f5ac63519541 1839 break;
Michael J. Spencer 1:f5ac63519541 1840 default:
Michael J. Spencer 1:f5ac63519541 1841 printer(arg, "0x%x", cishort);
Michael J. Spencer 1:f5ac63519541 1842 }
Michael J. Spencer 1:f5ac63519541 1843 }
Michael J. Spencer 1:f5ac63519541 1844 break;
Michael J. Spencer 1:f5ac63519541 1845 case CI_QUALITY:
Michael J. Spencer 1:f5ac63519541 1846 if (olen >= CILEN_SHORT) {
Michael J. Spencer 1:f5ac63519541 1847 p += 2;
Michael J. Spencer 1:f5ac63519541 1848 printer(arg, "quality ");
Michael J. Spencer 1:f5ac63519541 1849 GETSHORT(cishort, p);
Michael J. Spencer 1:f5ac63519541 1850 switch (cishort) {
Michael J. Spencer 1:f5ac63519541 1851 case PPP_LQR:
Michael J. Spencer 1:f5ac63519541 1852 printer(arg, "lqr");
Michael J. Spencer 1:f5ac63519541 1853 break;
Michael J. Spencer 1:f5ac63519541 1854 default:
Michael J. Spencer 1:f5ac63519541 1855 printer(arg, "0x%x", cishort);
Michael J. Spencer 1:f5ac63519541 1856 }
Michael J. Spencer 1:f5ac63519541 1857 }
Michael J. Spencer 1:f5ac63519541 1858 break;
Michael J. Spencer 1:f5ac63519541 1859 case CI_CALLBACK:
Michael J. Spencer 1:f5ac63519541 1860 if (olen >= CILEN_CHAR) {
Michael J. Spencer 1:f5ac63519541 1861 p += 2;
Michael J. Spencer 1:f5ac63519541 1862 printer(arg, "callback ");
Michael J. Spencer 1:f5ac63519541 1863 GETSHORT(cishort, p);
Michael J. Spencer 1:f5ac63519541 1864 switch (cishort) {
Michael J. Spencer 1:f5ac63519541 1865 case CBCP_OPT:
Michael J. Spencer 1:f5ac63519541 1866 printer(arg, "CBCP");
Michael J. Spencer 1:f5ac63519541 1867 break;
Michael J. Spencer 1:f5ac63519541 1868 default:
Michael J. Spencer 1:f5ac63519541 1869 printer(arg, "0x%x", cishort);
Michael J. Spencer 1:f5ac63519541 1870 }
Michael J. Spencer 1:f5ac63519541 1871 }
Michael J. Spencer 1:f5ac63519541 1872 break;
Michael J. Spencer 1:f5ac63519541 1873 case CI_MAGICNUMBER:
Michael J. Spencer 1:f5ac63519541 1874 if (olen == CILEN_LONG) {
Michael J. Spencer 1:f5ac63519541 1875 p += 2;
Michael J. Spencer 1:f5ac63519541 1876 GETLONG(cilong, p);
Michael J. Spencer 1:f5ac63519541 1877 printer(arg, "magic 0x%x", cilong);
Michael J. Spencer 1:f5ac63519541 1878 }
Michael J. Spencer 1:f5ac63519541 1879 break;
Michael J. Spencer 1:f5ac63519541 1880 case CI_PCOMPRESSION:
Michael J. Spencer 1:f5ac63519541 1881 if (olen == CILEN_VOID) {
Michael J. Spencer 1:f5ac63519541 1882 p += 2;
Michael J. Spencer 1:f5ac63519541 1883 printer(arg, "pcomp");
Michael J. Spencer 1:f5ac63519541 1884 }
Michael J. Spencer 1:f5ac63519541 1885 break;
Michael J. Spencer 1:f5ac63519541 1886 case CI_ACCOMPRESSION:
Michael J. Spencer 1:f5ac63519541 1887 if (olen == CILEN_VOID) {
Michael J. Spencer 1:f5ac63519541 1888 p += 2;
Michael J. Spencer 1:f5ac63519541 1889 printer(arg, "accomp");
Michael J. Spencer 1:f5ac63519541 1890 }
Michael J. Spencer 1:f5ac63519541 1891 break;
Michael J. Spencer 1:f5ac63519541 1892 }
Michael J. Spencer 1:f5ac63519541 1893 while (p < optend) {
Michael J. Spencer 1:f5ac63519541 1894 GETCHAR(code, p);
Michael J. Spencer 1:f5ac63519541 1895 printer(arg, " %.2x", code);
Michael J. Spencer 1:f5ac63519541 1896 }
Michael J. Spencer 1:f5ac63519541 1897 printer(arg, ">");
Michael J. Spencer 1:f5ac63519541 1898 }
Michael J. Spencer 1:f5ac63519541 1899 break;
Michael J. Spencer 1:f5ac63519541 1900
Michael J. Spencer 1:f5ac63519541 1901 case TERMACK:
Michael J. Spencer 1:f5ac63519541 1902 case TERMREQ:
Michael J. Spencer 1:f5ac63519541 1903 if (len > 0 && *p >= ' ' && *p < 0x7f) {
Michael J. Spencer 1:f5ac63519541 1904 printer(arg, " ");
Michael J. Spencer 1:f5ac63519541 1905 print_string((char*)p, len, printer, arg);
Michael J. Spencer 1:f5ac63519541 1906 p += len;
Michael J. Spencer 1:f5ac63519541 1907 len = 0;
Michael J. Spencer 1:f5ac63519541 1908 }
Michael J. Spencer 1:f5ac63519541 1909 break;
Michael J. Spencer 1:f5ac63519541 1910
Michael J. Spencer 1:f5ac63519541 1911 case ECHOREQ:
Michael J. Spencer 1:f5ac63519541 1912 case ECHOREP:
Michael J. Spencer 1:f5ac63519541 1913 case DISCREQ:
Michael J. Spencer 1:f5ac63519541 1914 if (len >= 4) {
Michael J. Spencer 1:f5ac63519541 1915 GETLONG(cilong, p);
Michael J. Spencer 1:f5ac63519541 1916 printer(arg, " magic=0x%x", cilong);
Michael J. Spencer 1:f5ac63519541 1917 p += 4;
Michael J. Spencer 1:f5ac63519541 1918 len -= 4;
Michael J. Spencer 1:f5ac63519541 1919 }
Michael J. Spencer 1:f5ac63519541 1920 break;
Michael J. Spencer 1:f5ac63519541 1921 }
Michael J. Spencer 1:f5ac63519541 1922
Michael J. Spencer 1:f5ac63519541 1923 /* print the rest of the bytes in the packet */
Michael J. Spencer 1:f5ac63519541 1924 for (; len > 0; --len) {
Michael J. Spencer 1:f5ac63519541 1925 GETCHAR(code, p);
Michael J. Spencer 1:f5ac63519541 1926 printer(arg, " %.2x", code);
Michael J. Spencer 1:f5ac63519541 1927 }
Michael J. Spencer 1:f5ac63519541 1928
Michael J. Spencer 1:f5ac63519541 1929 return (int)(p - pstart);
Michael J. Spencer 1:f5ac63519541 1930 }
Michael J. Spencer 1:f5ac63519541 1931 #endif /* PPP_ADDITIONAL_CALLBACKS */
Michael J. Spencer 1:f5ac63519541 1932
Michael J. Spencer 1:f5ac63519541 1933 /*
Michael J. Spencer 1:f5ac63519541 1934 * Time to shut down the link because there is nothing out there.
Michael J. Spencer 1:f5ac63519541 1935 */
Michael J. Spencer 1:f5ac63519541 1936 static void
Michael J. Spencer 1:f5ac63519541 1937 LcpLinkFailure (fsm *f)
Michael J. Spencer 1:f5ac63519541 1938 {
Michael J. Spencer 1:f5ac63519541 1939 if (f->state == LS_OPENED) {
Michael J. Spencer 1:f5ac63519541 1940 LCPDEBUG(LOG_INFO, ("No response to %d echo-requests\n", lcp_echos_pending));
Michael J. Spencer 1:f5ac63519541 1941 LCPDEBUG(LOG_NOTICE, ("Serial link appears to be disconnected.\n"));
Michael J. Spencer 1:f5ac63519541 1942 lcp_close(f->unit, "Peer not responding");
Michael J. Spencer 1:f5ac63519541 1943 }
Michael J. Spencer 1:f5ac63519541 1944 }
Michael J. Spencer 1:f5ac63519541 1945
Michael J. Spencer 1:f5ac63519541 1946 /*
Michael J. Spencer 1:f5ac63519541 1947 * Timer expired for the LCP echo requests from this process.
Michael J. Spencer 1:f5ac63519541 1948 */
Michael J. Spencer 1:f5ac63519541 1949 static void
Michael J. Spencer 1:f5ac63519541 1950 LcpEchoCheck (fsm *f)
Michael J. Spencer 1:f5ac63519541 1951 {
Michael J. Spencer 1:f5ac63519541 1952 LcpSendEchoRequest (f);
Michael J. Spencer 1:f5ac63519541 1953
Michael J. Spencer 1:f5ac63519541 1954 /*
Michael J. Spencer 1:f5ac63519541 1955 * Start the timer for the next interval.
Michael J. Spencer 1:f5ac63519541 1956 */
Michael J. Spencer 1:f5ac63519541 1957 LWIP_ASSERT("lcp_echo_timer_running == 0", lcp_echo_timer_running == 0);
Michael J. Spencer 1:f5ac63519541 1958
Michael J. Spencer 1:f5ac63519541 1959 TIMEOUT (LcpEchoTimeout, f, lcp_echo_interval);
Michael J. Spencer 1:f5ac63519541 1960 lcp_echo_timer_running = 1;
Michael J. Spencer 1:f5ac63519541 1961 }
Michael J. Spencer 1:f5ac63519541 1962
Michael J. Spencer 1:f5ac63519541 1963 /*
Michael J. Spencer 1:f5ac63519541 1964 * LcpEchoTimeout - Timer expired on the LCP echo
Michael J. Spencer 1:f5ac63519541 1965 */
Michael J. Spencer 1:f5ac63519541 1966 static void
Michael J. Spencer 1:f5ac63519541 1967 LcpEchoTimeout (void *arg)
Michael J. Spencer 1:f5ac63519541 1968 {
Michael J. Spencer 1:f5ac63519541 1969 if (lcp_echo_timer_running != 0) {
Michael J. Spencer 1:f5ac63519541 1970 lcp_echo_timer_running = 0;
Michael J. Spencer 1:f5ac63519541 1971 LcpEchoCheck ((fsm *) arg);
Michael J. Spencer 1:f5ac63519541 1972 }
Michael J. Spencer 1:f5ac63519541 1973 }
Michael J. Spencer 1:f5ac63519541 1974
Michael J. Spencer 1:f5ac63519541 1975 /*
Michael J. Spencer 1:f5ac63519541 1976 * LcpEchoReply - LCP has received a reply to the echo
Michael J. Spencer 1:f5ac63519541 1977 */
Michael J. Spencer 1:f5ac63519541 1978 static void
Michael J. Spencer 1:f5ac63519541 1979 lcp_received_echo_reply (fsm *f, int id, u_char *inp, int len)
Michael J. Spencer 1:f5ac63519541 1980 {
Michael J. Spencer 1:f5ac63519541 1981 u32_t magic;
Michael J. Spencer 1:f5ac63519541 1982
Michael J. Spencer 1:f5ac63519541 1983 LWIP_UNUSED_ARG(id);
Michael J. Spencer 1:f5ac63519541 1984
Michael J. Spencer 1:f5ac63519541 1985 /* Check the magic number - don't count replies from ourselves. */
Michael J. Spencer 1:f5ac63519541 1986 if (len < 4) {
Michael J. Spencer 1:f5ac63519541 1987 LCPDEBUG(LOG_WARNING, ("lcp: received short Echo-Reply, length %d\n", len));
Michael J. Spencer 1:f5ac63519541 1988 return;
Michael J. Spencer 1:f5ac63519541 1989 }
Michael J. Spencer 1:f5ac63519541 1990 GETLONG(magic, inp);
Michael J. Spencer 1:f5ac63519541 1991 if (lcp_gotoptions[f->unit].neg_magicnumber && magic == lcp_gotoptions[f->unit].magicnumber) {
Michael J. Spencer 1:f5ac63519541 1992 LCPDEBUG(LOG_WARNING, ("appear to have received our own echo-reply!\n"));
Michael J. Spencer 1:f5ac63519541 1993 return;
Michael J. Spencer 1:f5ac63519541 1994 }
Michael J. Spencer 1:f5ac63519541 1995
Michael J. Spencer 1:f5ac63519541 1996 /* Reset the number of outstanding echo frames */
Michael J. Spencer 1:f5ac63519541 1997 lcp_echos_pending = 0;
Michael J. Spencer 1:f5ac63519541 1998 }
Michael J. Spencer 1:f5ac63519541 1999
Michael J. Spencer 1:f5ac63519541 2000 /*
Michael J. Spencer 1:f5ac63519541 2001 * LcpSendEchoRequest - Send an echo request frame to the peer
Michael J. Spencer 1:f5ac63519541 2002 */
Michael J. Spencer 1:f5ac63519541 2003 static void
Michael J. Spencer 1:f5ac63519541 2004 LcpSendEchoRequest (fsm *f)
Michael J. Spencer 1:f5ac63519541 2005 {
Michael J. Spencer 1:f5ac63519541 2006 u32_t lcp_magic;
Michael J. Spencer 1:f5ac63519541 2007 u_char pkt[4], *pktp;
Michael J. Spencer 1:f5ac63519541 2008
Michael J. Spencer 1:f5ac63519541 2009 /*
Michael J. Spencer 1:f5ac63519541 2010 * Detect the failure of the peer at this point.
Michael J. Spencer 1:f5ac63519541 2011 */
Michael J. Spencer 1:f5ac63519541 2012 if (lcp_echo_fails != 0) {
Michael J. Spencer 1:f5ac63519541 2013 if (lcp_echos_pending >= lcp_echo_fails) {
Michael J. Spencer 1:f5ac63519541 2014 LcpLinkFailure(f);
Michael J. Spencer 1:f5ac63519541 2015 lcp_echos_pending = 0;
Michael J. Spencer 1:f5ac63519541 2016 }
Michael J. Spencer 1:f5ac63519541 2017 }
Michael J. Spencer 1:f5ac63519541 2018
Michael J. Spencer 1:f5ac63519541 2019 /*
Michael J. Spencer 1:f5ac63519541 2020 * Make and send the echo request frame.
Michael J. Spencer 1:f5ac63519541 2021 */
Michael J. Spencer 1:f5ac63519541 2022 if (f->state == LS_OPENED) {
Michael J. Spencer 1:f5ac63519541 2023 lcp_magic = lcp_gotoptions[f->unit].magicnumber;
Michael J. Spencer 1:f5ac63519541 2024 pktp = pkt;
Michael J. Spencer 1:f5ac63519541 2025 PUTLONG(lcp_magic, pktp);
Michael J. Spencer 1:f5ac63519541 2026 fsm_sdata(f, ECHOREQ, (u_char)(lcp_echo_number++ & 0xFF), pkt, (int)(pktp - pkt));
Michael J. Spencer 1:f5ac63519541 2027 ++lcp_echos_pending;
Michael J. Spencer 1:f5ac63519541 2028 }
Michael J. Spencer 1:f5ac63519541 2029 }
Michael J. Spencer 1:f5ac63519541 2030
Michael J. Spencer 1:f5ac63519541 2031 /*
Michael J. Spencer 1:f5ac63519541 2032 * lcp_echo_lowerup - Start the timer for the LCP frame
Michael J. Spencer 1:f5ac63519541 2033 */
Michael J. Spencer 1:f5ac63519541 2034
Michael J. Spencer 1:f5ac63519541 2035 static void
Michael J. Spencer 1:f5ac63519541 2036 lcp_echo_lowerup (int unit)
Michael J. Spencer 1:f5ac63519541 2037 {
Michael J. Spencer 1:f5ac63519541 2038 fsm *f = &lcp_fsm[unit];
Michael J. Spencer 1:f5ac63519541 2039
Michael J. Spencer 1:f5ac63519541 2040 /* Clear the parameters for generating echo frames */
Michael J. Spencer 1:f5ac63519541 2041 lcp_echos_pending = 0;
Michael J. Spencer 1:f5ac63519541 2042 lcp_echo_number = 0;
Michael J. Spencer 1:f5ac63519541 2043 lcp_echo_timer_running = 0;
Michael J. Spencer 1:f5ac63519541 2044
Michael J. Spencer 1:f5ac63519541 2045 /* If a timeout interval is specified then start the timer */
Michael J. Spencer 1:f5ac63519541 2046 if (lcp_echo_interval != 0) {
Michael J. Spencer 1:f5ac63519541 2047 LcpEchoCheck (f);
Michael J. Spencer 1:f5ac63519541 2048 }
Michael J. Spencer 1:f5ac63519541 2049 }
Michael J. Spencer 1:f5ac63519541 2050
Michael J. Spencer 1:f5ac63519541 2051 /*
Michael J. Spencer 1:f5ac63519541 2052 * lcp_echo_lowerdown - Stop the timer for the LCP frame
Michael J. Spencer 1:f5ac63519541 2053 */
Michael J. Spencer 1:f5ac63519541 2054
Michael J. Spencer 1:f5ac63519541 2055 static void
Michael J. Spencer 1:f5ac63519541 2056 lcp_echo_lowerdown (int unit)
Michael J. Spencer 1:f5ac63519541 2057 {
Michael J. Spencer 1:f5ac63519541 2058 fsm *f = &lcp_fsm[unit];
Michael J. Spencer 1:f5ac63519541 2059
Michael J. Spencer 1:f5ac63519541 2060 if (lcp_echo_timer_running != 0) {
Michael J. Spencer 1:f5ac63519541 2061 UNTIMEOUT (LcpEchoTimeout, f);
Michael J. Spencer 1:f5ac63519541 2062 lcp_echo_timer_running = 0;
Michael J. Spencer 1:f5ac63519541 2063 }
Michael J. Spencer 1:f5ac63519541 2064 }
Michael J. Spencer 1:f5ac63519541 2065
Michael J. Spencer 1:f5ac63519541 2066 #endif /* PPP_SUPPORT */