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lwip/netif/ppp/lcp.c@0:b2805b6888dc, 2016-06-20 (annotated)

Committer:
robert_jw
Date:
Mon Jun 20 01:40:20 2016 +0000
Revision:
0:b2805b6888dc
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robert_jw 0:b2805b6888dc 1 /*****************************************************************************
robert_jw 0:b2805b6888dc 2 * lcp.c - Network Link Control Protocol program file.
robert_jw 0:b2805b6888dc 3 *
robert_jw 0:b2805b6888dc 4 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
robert_jw 0:b2805b6888dc 5 * portions Copyright (c) 1997 by Global Election Systems Inc.
robert_jw 0:b2805b6888dc 6 *
robert_jw 0:b2805b6888dc 7 * The authors hereby grant permission to use, copy, modify, distribute,
robert_jw 0:b2805b6888dc 8 * and license this software and its documentation for any purpose, provided
robert_jw 0:b2805b6888dc 9 * that existing copyright notices are retained in all copies and that this
robert_jw 0:b2805b6888dc 10 * notice and the following disclaimer are included verbatim in any
robert_jw 0:b2805b6888dc 11 * distributions. No written agreement, license, or royalty fee is required
robert_jw 0:b2805b6888dc 12 * for any of the authorized uses.
robert_jw 0:b2805b6888dc 13 *
robert_jw 0:b2805b6888dc 14 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
robert_jw 0:b2805b6888dc 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
robert_jw 0:b2805b6888dc 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
robert_jw 0:b2805b6888dc 17 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
robert_jw 0:b2805b6888dc 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
robert_jw 0:b2805b6888dc 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
robert_jw 0:b2805b6888dc 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
robert_jw 0:b2805b6888dc 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
robert_jw 0:b2805b6888dc 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
robert_jw 0:b2805b6888dc 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
robert_jw 0:b2805b6888dc 24 *
robert_jw 0:b2805b6888dc 25 ******************************************************************************
robert_jw 0:b2805b6888dc 26 * REVISION HISTORY
robert_jw 0:b2805b6888dc 27 *
robert_jw 0:b2805b6888dc 28 * 03-01-01 Marc Boucher <marc@mbsi.ca>
robert_jw 0:b2805b6888dc 29 * Ported to lwIP.
robert_jw 0:b2805b6888dc 30 * 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
robert_jw 0:b2805b6888dc 31 * Original.
robert_jw 0:b2805b6888dc 32 *****************************************************************************/
robert_jw 0:b2805b6888dc 33
robert_jw 0:b2805b6888dc 34 /*
robert_jw 0:b2805b6888dc 35 * lcp.c - PPP Link Control Protocol.
robert_jw 0:b2805b6888dc 36 *
robert_jw 0:b2805b6888dc 37 * Copyright (c) 1989 Carnegie Mellon University.
robert_jw 0:b2805b6888dc 38 * All rights reserved.
robert_jw 0:b2805b6888dc 39 *
robert_jw 0:b2805b6888dc 40 * Redistribution and use in source and binary forms are permitted
robert_jw 0:b2805b6888dc 41 * provided that the above copyright notice and this paragraph are
robert_jw 0:b2805b6888dc 42 * duplicated in all such forms and that any documentation,
robert_jw 0:b2805b6888dc 43 * advertising materials, and other materials related to such
robert_jw 0:b2805b6888dc 44 * distribution and use acknowledge that the software was developed
robert_jw 0:b2805b6888dc 45 * by Carnegie Mellon University. The name of the
robert_jw 0:b2805b6888dc 46 * University may not be used to endorse or promote products derived
robert_jw 0:b2805b6888dc 47 * from this software without specific prior written permission.
robert_jw 0:b2805b6888dc 48 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
robert_jw 0:b2805b6888dc 49 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
robert_jw 0:b2805b6888dc 50 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
robert_jw 0:b2805b6888dc 51 */
robert_jw 0:b2805b6888dc 52
robert_jw 0:b2805b6888dc 53
robert_jw 0:b2805b6888dc 54 #include "lwip/opt.h"
robert_jw 0:b2805b6888dc 55
robert_jw 0:b2805b6888dc 56 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
robert_jw 0:b2805b6888dc 57
robert_jw 0:b2805b6888dc 58 #include "ppp.h"
robert_jw 0:b2805b6888dc 59 #include "pppdebug.h"
robert_jw 0:b2805b6888dc 60
robert_jw 0:b2805b6888dc 61 #include "fsm.h"
robert_jw 0:b2805b6888dc 62 #include "chap.h"
robert_jw 0:b2805b6888dc 63 #include "magic.h"
robert_jw 0:b2805b6888dc 64 #include "auth.h"
robert_jw 0:b2805b6888dc 65 #include "lcp.h"
robert_jw 0:b2805b6888dc 66
robert_jw 0:b2805b6888dc 67 #include <string.h>
robert_jw 0:b2805b6888dc 68
robert_jw 0:b2805b6888dc 69 #if PPPOE_SUPPORT
robert_jw 0:b2805b6888dc 70 #include "netif/ppp_oe.h"
robert_jw 0:b2805b6888dc 71 #else
robert_jw 0:b2805b6888dc 72 #define PPPOE_MAXMTU PPP_MAXMRU
robert_jw 0:b2805b6888dc 73 #endif
robert_jw 0:b2805b6888dc 74
robert_jw 0:b2805b6888dc 75 #if 0 /* UNUSED */
robert_jw 0:b2805b6888dc 76 /*
robert_jw 0:b2805b6888dc 77 * LCP-related command-line options.
robert_jw 0:b2805b6888dc 78 */
robert_jw 0:b2805b6888dc 79 int lcp_echo_interval = 0; /* Interval between LCP echo-requests */
robert_jw 0:b2805b6888dc 80 int lcp_echo_fails = 0; /* Tolerance to unanswered echo-requests */
robert_jw 0:b2805b6888dc 81 bool lax_recv = 0; /* accept control chars in asyncmap */
robert_jw 0:b2805b6888dc 82
robert_jw 0:b2805b6888dc 83 static int setescape (char **);
robert_jw 0:b2805b6888dc 84
robert_jw 0:b2805b6888dc 85 static option_t lcp_option_list[] = {
robert_jw 0:b2805b6888dc 86 /* LCP options */
robert_jw 0:b2805b6888dc 87 /* list stripped for simplicity */
robert_jw 0:b2805b6888dc 88 {NULL}
robert_jw 0:b2805b6888dc 89 };
robert_jw 0:b2805b6888dc 90 #endif /* UNUSED */
robert_jw 0:b2805b6888dc 91
robert_jw 0:b2805b6888dc 92 /* options */
robert_jw 0:b2805b6888dc 93 LinkPhase lcp_phase[NUM_PPP]; /* Phase of link session (RFC 1661) */
robert_jw 0:b2805b6888dc 94 static u_int lcp_echo_interval = LCP_ECHOINTERVAL; /* Interval between LCP echo-requests */
robert_jw 0:b2805b6888dc 95 static u_int lcp_echo_fails = LCP_MAXECHOFAILS; /* Tolerance to unanswered echo-requests */
robert_jw 0:b2805b6888dc 96
robert_jw 0:b2805b6888dc 97 /* global vars */
robert_jw 0:b2805b6888dc 98 static fsm lcp_fsm[NUM_PPP]; /* LCP fsm structure (global)*/
robert_jw 0:b2805b6888dc 99 lcp_options lcp_wantoptions[NUM_PPP]; /* Options that we want to request */
robert_jw 0:b2805b6888dc 100 lcp_options lcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
robert_jw 0:b2805b6888dc 101 lcp_options lcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
robert_jw 0:b2805b6888dc 102 lcp_options lcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
robert_jw 0:b2805b6888dc 103 ext_accm xmit_accm[NUM_PPP]; /* extended transmit ACCM */
robert_jw 0:b2805b6888dc 104
robert_jw 0:b2805b6888dc 105 static u32_t lcp_echos_pending = 0; /* Number of outstanding echo msgs */
robert_jw 0:b2805b6888dc 106 static u32_t lcp_echo_number = 0; /* ID number of next echo frame */
robert_jw 0:b2805b6888dc 107 static u32_t lcp_echo_timer_running = 0; /* TRUE if a timer is running */
robert_jw 0:b2805b6888dc 108
robert_jw 0:b2805b6888dc 109 /* @todo: do we really need such a large buffer? The typical 1500 bytes seem too much. */
robert_jw 0:b2805b6888dc 110 static u_char nak_buffer[PPP_MRU] __attribute((section("AHBSRAM1"))); /* where we construct a nak packet */
robert_jw 0:b2805b6888dc 111
robert_jw 0:b2805b6888dc 112 /*
robert_jw 0:b2805b6888dc 113 * Callbacks for fsm code. (CI = Configuration Information)
robert_jw 0:b2805b6888dc 114 */
robert_jw 0:b2805b6888dc 115 static void lcp_resetci (fsm*); /* Reset our CI */
robert_jw 0:b2805b6888dc 116 static int lcp_cilen (fsm*); /* Return length of our CI */
robert_jw 0:b2805b6888dc 117 static void lcp_addci (fsm*, u_char*, int*); /* Add our CI to pkt */
robert_jw 0:b2805b6888dc 118 static int lcp_ackci (fsm*, u_char*, int); /* Peer ack'd our CI */
robert_jw 0:b2805b6888dc 119 static int lcp_nakci (fsm*, u_char*, int); /* Peer nak'd our CI */
robert_jw 0:b2805b6888dc 120 static int lcp_rejci (fsm*, u_char*, int); /* Peer rej'd our CI */
robert_jw 0:b2805b6888dc 121 static int lcp_reqci (fsm*, u_char*, int*, int); /* Rcv peer CI */
robert_jw 0:b2805b6888dc 122 static void lcp_up (fsm*); /* We're UP */
robert_jw 0:b2805b6888dc 123 static void lcp_down (fsm*); /* We're DOWN */
robert_jw 0:b2805b6888dc 124 static void lcp_starting (fsm*); /* We need lower layer up */
robert_jw 0:b2805b6888dc 125 static void lcp_finished (fsm*); /* We need lower layer down */
robert_jw 0:b2805b6888dc 126 static int lcp_extcode (fsm*, int, u_char, u_char*, int);
robert_jw 0:b2805b6888dc 127 static void lcp_rprotrej (fsm*, u_char*, int);
robert_jw 0:b2805b6888dc 128
robert_jw 0:b2805b6888dc 129 /*
robert_jw 0:b2805b6888dc 130 * routines to send LCP echos to peer
robert_jw 0:b2805b6888dc 131 */
robert_jw 0:b2805b6888dc 132
robert_jw 0:b2805b6888dc 133 static void lcp_echo_lowerup (int);
robert_jw 0:b2805b6888dc 134 static void lcp_echo_lowerdown (int);
robert_jw 0:b2805b6888dc 135 static void LcpEchoTimeout (void*);
robert_jw 0:b2805b6888dc 136 static void lcp_received_echo_reply (fsm*, int, u_char*, int);
robert_jw 0:b2805b6888dc 137 static void LcpSendEchoRequest (fsm*);
robert_jw 0:b2805b6888dc 138 static void LcpLinkFailure (fsm*);
robert_jw 0:b2805b6888dc 139 static void LcpEchoCheck (fsm*);
robert_jw 0:b2805b6888dc 140
robert_jw 0:b2805b6888dc 141 static fsm_callbacks lcp_callbacks = { /* LCP callback routines */
robert_jw 0:b2805b6888dc 142 lcp_resetci, /* Reset our Configuration Information */
robert_jw 0:b2805b6888dc 143 lcp_cilen, /* Length of our Configuration Information */
robert_jw 0:b2805b6888dc 144 lcp_addci, /* Add our Configuration Information */
robert_jw 0:b2805b6888dc 145 lcp_ackci, /* ACK our Configuration Information */
robert_jw 0:b2805b6888dc 146 lcp_nakci, /* NAK our Configuration Information */
robert_jw 0:b2805b6888dc 147 lcp_rejci, /* Reject our Configuration Information */
robert_jw 0:b2805b6888dc 148 lcp_reqci, /* Request peer's Configuration Information */
robert_jw 0:b2805b6888dc 149 lcp_up, /* Called when fsm reaches LS_OPENED state */
robert_jw 0:b2805b6888dc 150 lcp_down, /* Called when fsm leaves LS_OPENED state */
robert_jw 0:b2805b6888dc 151 lcp_starting, /* Called when we want the lower layer up */
robert_jw 0:b2805b6888dc 152 lcp_finished, /* Called when we want the lower layer down */
robert_jw 0:b2805b6888dc 153 NULL, /* Called when Protocol-Reject received */
robert_jw 0:b2805b6888dc 154 NULL, /* Retransmission is necessary */
robert_jw 0:b2805b6888dc 155 lcp_extcode, /* Called to handle LCP-specific codes */
robert_jw 0:b2805b6888dc 156 "LCP" /* String name of protocol */
robert_jw 0:b2805b6888dc 157 };
robert_jw 0:b2805b6888dc 158
robert_jw 0:b2805b6888dc 159 /*
robert_jw 0:b2805b6888dc 160 * Protocol entry points.
robert_jw 0:b2805b6888dc 161 * Some of these are called directly.
robert_jw 0:b2805b6888dc 162 */
robert_jw 0:b2805b6888dc 163
robert_jw 0:b2805b6888dc 164 static void lcp_input (int, u_char *, int);
robert_jw 0:b2805b6888dc 165 static void lcp_protrej (int);
robert_jw 0:b2805b6888dc 166
robert_jw 0:b2805b6888dc 167 struct protent lcp_protent = {
robert_jw 0:b2805b6888dc 168 PPP_LCP,
robert_jw 0:b2805b6888dc 169 lcp_init,
robert_jw 0:b2805b6888dc 170 lcp_input,
robert_jw 0:b2805b6888dc 171 lcp_protrej,
robert_jw 0:b2805b6888dc 172 lcp_lowerup,
robert_jw 0:b2805b6888dc 173 lcp_lowerdown,
robert_jw 0:b2805b6888dc 174 lcp_open,
robert_jw 0:b2805b6888dc 175 lcp_close,
robert_jw 0:b2805b6888dc 176 #if PPP_ADDITIONAL_CALLBACKS
robert_jw 0:b2805b6888dc 177 lcp_printpkt,
robert_jw 0:b2805b6888dc 178 NULL,
robert_jw 0:b2805b6888dc 179 #endif /* PPP_ADDITIONAL_CALLBACKS */
robert_jw 0:b2805b6888dc 180 1,
robert_jw 0:b2805b6888dc 181 "LCP",
robert_jw 0:b2805b6888dc 182 #if PPP_ADDITIONAL_CALLBACKS
robert_jw 0:b2805b6888dc 183 NULL,
robert_jw 0:b2805b6888dc 184 NULL,
robert_jw 0:b2805b6888dc 185 NULL
robert_jw 0:b2805b6888dc 186 #endif /* PPP_ADDITIONAL_CALLBACKS */
robert_jw 0:b2805b6888dc 187 };
robert_jw 0:b2805b6888dc 188
robert_jw 0:b2805b6888dc 189 int lcp_loopbackfail = DEFLOOPBACKFAIL;
robert_jw 0:b2805b6888dc 190
robert_jw 0:b2805b6888dc 191 /*
robert_jw 0:b2805b6888dc 192 * Length of each type of configuration option (in octets)
robert_jw 0:b2805b6888dc 193 */
robert_jw 0:b2805b6888dc 194 #define CILEN_VOID 2
robert_jw 0:b2805b6888dc 195 #define CILEN_CHAR 3
robert_jw 0:b2805b6888dc 196 #define CILEN_SHORT 4 /* CILEN_VOID + sizeof(short) */
robert_jw 0:b2805b6888dc 197 #define CILEN_CHAP 5 /* CILEN_VOID + sizeof(short) + 1 */
robert_jw 0:b2805b6888dc 198 #define CILEN_LONG 6 /* CILEN_VOID + sizeof(long) */
robert_jw 0:b2805b6888dc 199 #define CILEN_LQR 8 /* CILEN_VOID + sizeof(short) + sizeof(long) */
robert_jw 0:b2805b6888dc 200 #define CILEN_CBCP 3
robert_jw 0:b2805b6888dc 201
robert_jw 0:b2805b6888dc 202 #define CODENAME(x) ((x) == CONFACK ? "ACK" : (x) == CONFNAK ? "NAK" : "REJ")
robert_jw 0:b2805b6888dc 203
robert_jw 0:b2805b6888dc 204 #if 0 /* UNUSED */
robert_jw 0:b2805b6888dc 205 /*
robert_jw 0:b2805b6888dc 206 * setescape - add chars to the set we escape on transmission.
robert_jw 0:b2805b6888dc 207 */
robert_jw 0:b2805b6888dc 208 static int
robert_jw 0:b2805b6888dc 209 setescape(argv)
robert_jw 0:b2805b6888dc 210 char **argv;
robert_jw 0:b2805b6888dc 211 {
robert_jw 0:b2805b6888dc 212 int n, ret;
robert_jw 0:b2805b6888dc 213 char *p, *endp;
robert_jw 0:b2805b6888dc 214
robert_jw 0:b2805b6888dc 215 p = *argv;
robert_jw 0:b2805b6888dc 216 ret = 1;
robert_jw 0:b2805b6888dc 217 while (*p) {
robert_jw 0:b2805b6888dc 218 n = strtol(p, &endp, 16);
robert_jw 0:b2805b6888dc 219 if (p == endp) {
robert_jw 0:b2805b6888dc 220 option_error("escape parameter contains invalid hex number '%s'", p);
robert_jw 0:b2805b6888dc 221 return 0;
robert_jw 0:b2805b6888dc 222 }
robert_jw 0:b2805b6888dc 223 p = endp;
robert_jw 0:b2805b6888dc 224 if (n < 0 || n == 0x5E || n > 0xFF) {
robert_jw 0:b2805b6888dc 225 option_error("can't escape character 0x%x", n);
robert_jw 0:b2805b6888dc 226 ret = 0;
robert_jw 0:b2805b6888dc 227 } else
robert_jw 0:b2805b6888dc 228 xmit_accm[0][n >> 5] |= 1 << (n & 0x1F);
robert_jw 0:b2805b6888dc 229 while (*p == ',' || *p == ' ')
robert_jw 0:b2805b6888dc 230 ++p;
robert_jw 0:b2805b6888dc 231 }
robert_jw 0:b2805b6888dc 232 return ret;
robert_jw 0:b2805b6888dc 233 }
robert_jw 0:b2805b6888dc 234 #endif /* UNUSED */
robert_jw 0:b2805b6888dc 235
robert_jw 0:b2805b6888dc 236 /*
robert_jw 0:b2805b6888dc 237 * lcp_init - Initialize LCP.
robert_jw 0:b2805b6888dc 238 */
robert_jw 0:b2805b6888dc 239 void
robert_jw 0:b2805b6888dc 240 lcp_init(int unit)
robert_jw 0:b2805b6888dc 241 {
robert_jw 0:b2805b6888dc 242 fsm *f = &lcp_fsm[unit];
robert_jw 0:b2805b6888dc 243 lcp_options *wo = &lcp_wantoptions[unit];
robert_jw 0:b2805b6888dc 244 lcp_options *ao = &lcp_allowoptions[unit];
robert_jw 0:b2805b6888dc 245
robert_jw 0:b2805b6888dc 246 f->unit = unit;
robert_jw 0:b2805b6888dc 247 f->protocol = PPP_LCP;
robert_jw 0:b2805b6888dc 248 f->callbacks = &lcp_callbacks;
robert_jw 0:b2805b6888dc 249
robert_jw 0:b2805b6888dc 250 fsm_init(f);
robert_jw 0:b2805b6888dc 251
robert_jw 0:b2805b6888dc 252 wo->passive = 0;
robert_jw 0:b2805b6888dc 253 wo->silent = 0;
robert_jw 0:b2805b6888dc 254 wo->restart = 0; /* Set to 1 in kernels or multi-line implementations */
robert_jw 0:b2805b6888dc 255 wo->neg_mru = 1;
robert_jw 0:b2805b6888dc 256 wo->mru = PPP_DEFMRU;
robert_jw 0:b2805b6888dc 257 wo->neg_asyncmap = 1;
robert_jw 0:b2805b6888dc 258 wo->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
robert_jw 0:b2805b6888dc 259 wo->neg_chap = 0; /* Set to 1 on server */
robert_jw 0:b2805b6888dc 260 wo->neg_upap = 0; /* Set to 1 on server */
robert_jw 0:b2805b6888dc 261 wo->chap_mdtype = CHAP_DIGEST_MD5;
robert_jw 0:b2805b6888dc 262 wo->neg_magicnumber = 1;
robert_jw 0:b2805b6888dc 263 wo->neg_pcompression = 1;
robert_jw 0:b2805b6888dc 264 wo->neg_accompression = 1;
robert_jw 0:b2805b6888dc 265 wo->neg_lqr = 0; /* no LQR implementation yet */
robert_jw 0:b2805b6888dc 266 wo->neg_cbcp = 0;
robert_jw 0:b2805b6888dc 267
robert_jw 0:b2805b6888dc 268 ao->neg_mru = 1;
robert_jw 0:b2805b6888dc 269 ao->mru = PPP_MAXMRU;
robert_jw 0:b2805b6888dc 270 ao->neg_asyncmap = 1;
robert_jw 0:b2805b6888dc 271 ao->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
robert_jw 0:b2805b6888dc 272 ao->neg_chap = (CHAP_SUPPORT != 0);
robert_jw 0:b2805b6888dc 273 ao->chap_mdtype = CHAP_DIGEST_MD5;
robert_jw 0:b2805b6888dc 274 ao->neg_upap = (PAP_SUPPORT != 0);
robert_jw 0:b2805b6888dc 275 ao->neg_magicnumber = 1;
robert_jw 0:b2805b6888dc 276 ao->neg_pcompression = 1;
robert_jw 0:b2805b6888dc 277 ao->neg_accompression = 1;
robert_jw 0:b2805b6888dc 278 ao->neg_lqr = 0; /* no LQR implementation yet */
robert_jw 0:b2805b6888dc 279 ao->neg_cbcp = (CBCP_SUPPORT != 0);
robert_jw 0:b2805b6888dc 280
robert_jw 0:b2805b6888dc 281 /*
robert_jw 0:b2805b6888dc 282 * Set transmit escape for the flag and escape characters plus anything
robert_jw 0:b2805b6888dc 283 * set for the allowable options.
robert_jw 0:b2805b6888dc 284 */
robert_jw 0:b2805b6888dc 285 memset(xmit_accm[unit], 0, sizeof(xmit_accm[0]));
robert_jw 0:b2805b6888dc 286 xmit_accm[unit][15] = 0x60;
robert_jw 0:b2805b6888dc 287 xmit_accm[unit][0] = (u_char)((ao->asyncmap & 0xFF));
robert_jw 0:b2805b6888dc 288 xmit_accm[unit][1] = (u_char)((ao->asyncmap >> 8) & 0xFF);
robert_jw 0:b2805b6888dc 289 xmit_accm[unit][2] = (u_char)((ao->asyncmap >> 16) & 0xFF);
robert_jw 0:b2805b6888dc 290 xmit_accm[unit][3] = (u_char)((ao->asyncmap >> 24) & 0xFF);
robert_jw 0:b2805b6888dc 291 LCPDEBUG(LOG_INFO, ("lcp_init: xmit_accm=%X %X %X %X\n",
robert_jw 0:b2805b6888dc 292 xmit_accm[unit][0],
robert_jw 0:b2805b6888dc 293 xmit_accm[unit][1],
robert_jw 0:b2805b6888dc 294 xmit_accm[unit][2],
robert_jw 0:b2805b6888dc 295 xmit_accm[unit][3]));
robert_jw 0:b2805b6888dc 296
robert_jw 0:b2805b6888dc 297 lcp_phase[unit] = PHASE_INITIALIZE;
robert_jw 0:b2805b6888dc 298 }
robert_jw 0:b2805b6888dc 299
robert_jw 0:b2805b6888dc 300
robert_jw 0:b2805b6888dc 301 /*
robert_jw 0:b2805b6888dc 302 * lcp_open - LCP is allowed to come up.
robert_jw 0:b2805b6888dc 303 */
robert_jw 0:b2805b6888dc 304 void
robert_jw 0:b2805b6888dc 305 lcp_open(int unit)
robert_jw 0:b2805b6888dc 306 {
robert_jw 0:b2805b6888dc 307 fsm *f = &lcp_fsm[unit];
robert_jw 0:b2805b6888dc 308 lcp_options *wo = &lcp_wantoptions[unit];
robert_jw 0:b2805b6888dc 309
robert_jw 0:b2805b6888dc 310 f->flags = 0;
robert_jw 0:b2805b6888dc 311 if (wo->passive) {
robert_jw 0:b2805b6888dc 312 f->flags |= OPT_PASSIVE;
robert_jw 0:b2805b6888dc 313 }
robert_jw 0:b2805b6888dc 314 if (wo->silent) {
robert_jw 0:b2805b6888dc 315 f->flags |= OPT_SILENT;
robert_jw 0:b2805b6888dc 316 }
robert_jw 0:b2805b6888dc 317 fsm_open(f);
robert_jw 0:b2805b6888dc 318
robert_jw 0:b2805b6888dc 319 lcp_phase[unit] = PHASE_ESTABLISH;
robert_jw 0:b2805b6888dc 320 }
robert_jw 0:b2805b6888dc 321
robert_jw 0:b2805b6888dc 322
robert_jw 0:b2805b6888dc 323 /*
robert_jw 0:b2805b6888dc 324 * lcp_close - Take LCP down.
robert_jw 0:b2805b6888dc 325 */
robert_jw 0:b2805b6888dc 326 void
robert_jw 0:b2805b6888dc 327 lcp_close(int unit, char *reason)
robert_jw 0:b2805b6888dc 328 {
robert_jw 0:b2805b6888dc 329 fsm *f = &lcp_fsm[unit];
robert_jw 0:b2805b6888dc 330
robert_jw 0:b2805b6888dc 331 if (lcp_phase[unit] != PHASE_DEAD) {
robert_jw 0:b2805b6888dc 332 lcp_phase[unit] = PHASE_TERMINATE;
robert_jw 0:b2805b6888dc 333 }
robert_jw 0:b2805b6888dc 334 if (f->state == LS_STOPPED && f->flags & (OPT_PASSIVE|OPT_SILENT)) {
robert_jw 0:b2805b6888dc 335 /*
robert_jw 0:b2805b6888dc 336 * This action is not strictly according to the FSM in RFC1548,
robert_jw 0:b2805b6888dc 337 * but it does mean that the program terminates if you do an
robert_jw 0:b2805b6888dc 338 * lcp_close() in passive/silent mode when a connection hasn't
robert_jw 0:b2805b6888dc 339 * been established.
robert_jw 0:b2805b6888dc 340 */
robert_jw 0:b2805b6888dc 341 f->state = LS_CLOSED;
robert_jw 0:b2805b6888dc 342 lcp_finished(f);
robert_jw 0:b2805b6888dc 343 } else {
robert_jw 0:b2805b6888dc 344 fsm_close(f, reason);
robert_jw 0:b2805b6888dc 345 }
robert_jw 0:b2805b6888dc 346 }
robert_jw 0:b2805b6888dc 347
robert_jw 0:b2805b6888dc 348
robert_jw 0:b2805b6888dc 349 /*
robert_jw 0:b2805b6888dc 350 * lcp_lowerup - The lower layer is up.
robert_jw 0:b2805b6888dc 351 */
robert_jw 0:b2805b6888dc 352 void
robert_jw 0:b2805b6888dc 353 lcp_lowerup(int unit)
robert_jw 0:b2805b6888dc 354 {
robert_jw 0:b2805b6888dc 355 lcp_options *wo = &lcp_wantoptions[unit];
robert_jw 0:b2805b6888dc 356
robert_jw 0:b2805b6888dc 357 /*
robert_jw 0:b2805b6888dc 358 * Don't use A/C or protocol compression on transmission,
robert_jw 0:b2805b6888dc 359 * but accept A/C and protocol compressed packets
robert_jw 0:b2805b6888dc 360 * if we are going to ask for A/C and protocol compression.
robert_jw 0:b2805b6888dc 361 */
robert_jw 0:b2805b6888dc 362 ppp_set_xaccm(unit, &xmit_accm[unit]);
robert_jw 0:b2805b6888dc 363 ppp_send_config(unit, PPP_MRU, 0xffffffffl, 0, 0);
robert_jw 0:b2805b6888dc 364 ppp_recv_config(unit, PPP_MRU, 0x00000000l,
robert_jw 0:b2805b6888dc 365 wo->neg_pcompression, wo->neg_accompression);
robert_jw 0:b2805b6888dc 366 peer_mru[unit] = PPP_MRU;
robert_jw 0:b2805b6888dc 367 lcp_allowoptions[unit].asyncmap = (u_long)xmit_accm[unit][0]
robert_jw 0:b2805b6888dc 368 | ((u_long)xmit_accm[unit][1] << 8)
robert_jw 0:b2805b6888dc 369 | ((u_long)xmit_accm[unit][2] << 16)
robert_jw 0:b2805b6888dc 370 | ((u_long)xmit_accm[unit][3] << 24);
robert_jw 0:b2805b6888dc 371 LCPDEBUG(LOG_INFO, ("lcp_lowerup: asyncmap=%X %X %X %X\n",
robert_jw 0:b2805b6888dc 372 xmit_accm[unit][3],
robert_jw 0:b2805b6888dc 373 xmit_accm[unit][2],
robert_jw 0:b2805b6888dc 374 xmit_accm[unit][1],
robert_jw 0:b2805b6888dc 375 xmit_accm[unit][0]));
robert_jw 0:b2805b6888dc 376
robert_jw 0:b2805b6888dc 377 fsm_lowerup(&lcp_fsm[unit]);
robert_jw 0:b2805b6888dc 378 }
robert_jw 0:b2805b6888dc 379
robert_jw 0:b2805b6888dc 380
robert_jw 0:b2805b6888dc 381 /*
robert_jw 0:b2805b6888dc 382 * lcp_lowerdown - The lower layer is down.
robert_jw 0:b2805b6888dc 383 */
robert_jw 0:b2805b6888dc 384 void
robert_jw 0:b2805b6888dc 385 lcp_lowerdown(int unit)
robert_jw 0:b2805b6888dc 386 {
robert_jw 0:b2805b6888dc 387 fsm_lowerdown(&lcp_fsm[unit]);
robert_jw 0:b2805b6888dc 388 }
robert_jw 0:b2805b6888dc 389
robert_jw 0:b2805b6888dc 390
robert_jw 0:b2805b6888dc 391 /*
robert_jw 0:b2805b6888dc 392 * lcp_input - Input LCP packet.
robert_jw 0:b2805b6888dc 393 */
robert_jw 0:b2805b6888dc 394 static void
robert_jw 0:b2805b6888dc 395 lcp_input(int unit, u_char *p, int len)
robert_jw 0:b2805b6888dc 396 {
robert_jw 0:b2805b6888dc 397 fsm *f = &lcp_fsm[unit];
robert_jw 0:b2805b6888dc 398
robert_jw 0:b2805b6888dc 399 fsm_input(f, p, len);
robert_jw 0:b2805b6888dc 400 }
robert_jw 0:b2805b6888dc 401
robert_jw 0:b2805b6888dc 402
robert_jw 0:b2805b6888dc 403 /*
robert_jw 0:b2805b6888dc 404 * lcp_extcode - Handle a LCP-specific code.
robert_jw 0:b2805b6888dc 405 */
robert_jw 0:b2805b6888dc 406 static int
robert_jw 0:b2805b6888dc 407 lcp_extcode(fsm *f, int code, u_char id, u_char *inp, int len)
robert_jw 0:b2805b6888dc 408 {
robert_jw 0:b2805b6888dc 409 u_char *magp;
robert_jw 0:b2805b6888dc 410
robert_jw 0:b2805b6888dc 411 switch( code ){
robert_jw 0:b2805b6888dc 412 case PROTREJ:
robert_jw 0:b2805b6888dc 413 lcp_rprotrej(f, inp, len);
robert_jw 0:b2805b6888dc 414 break;
robert_jw 0:b2805b6888dc 415
robert_jw 0:b2805b6888dc 416 case ECHOREQ:
robert_jw 0:b2805b6888dc 417 if (f->state != LS_OPENED) {
robert_jw 0:b2805b6888dc 418 break;
robert_jw 0:b2805b6888dc 419 }
robert_jw 0:b2805b6888dc 420 LCPDEBUG(LOG_INFO, ("lcp: Echo-Request, Rcvd id %d\n", id));
robert_jw 0:b2805b6888dc 421 magp = inp;
robert_jw 0:b2805b6888dc 422 PUTLONG(lcp_gotoptions[f->unit].magicnumber, magp);
robert_jw 0:b2805b6888dc 423 fsm_sdata(f, ECHOREP, id, inp, len);
robert_jw 0:b2805b6888dc 424 break;
robert_jw 0:b2805b6888dc 425
robert_jw 0:b2805b6888dc 426 case ECHOREP:
robert_jw 0:b2805b6888dc 427 lcp_received_echo_reply(f, id, inp, len);
robert_jw 0:b2805b6888dc 428 break;
robert_jw 0:b2805b6888dc 429
robert_jw 0:b2805b6888dc 430 case DISCREQ:
robert_jw 0:b2805b6888dc 431 break;
robert_jw 0:b2805b6888dc 432
robert_jw 0:b2805b6888dc 433 default:
robert_jw 0:b2805b6888dc 434 return 0;
robert_jw 0:b2805b6888dc 435 }
robert_jw 0:b2805b6888dc 436 return 1;
robert_jw 0:b2805b6888dc 437 }
robert_jw 0:b2805b6888dc 438
robert_jw 0:b2805b6888dc 439
robert_jw 0:b2805b6888dc 440 /*
robert_jw 0:b2805b6888dc 441 * lcp_rprotrej - Receive an Protocol-Reject.
robert_jw 0:b2805b6888dc 442 *
robert_jw 0:b2805b6888dc 443 * Figure out which protocol is rejected and inform it.
robert_jw 0:b2805b6888dc 444 */
robert_jw 0:b2805b6888dc 445 static void
robert_jw 0:b2805b6888dc 446 lcp_rprotrej(fsm *f, u_char *inp, int len)
robert_jw 0:b2805b6888dc 447 {
robert_jw 0:b2805b6888dc 448 int i;
robert_jw 0:b2805b6888dc 449 struct protent *protp;
robert_jw 0:b2805b6888dc 450 u_short prot;
robert_jw 0:b2805b6888dc 451
robert_jw 0:b2805b6888dc 452 if (len < (int)sizeof (u_short)) {
robert_jw 0:b2805b6888dc 453 LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd short Protocol-Reject packet!\n"));
robert_jw 0:b2805b6888dc 454 return;
robert_jw 0:b2805b6888dc 455 }
robert_jw 0:b2805b6888dc 456
robert_jw 0:b2805b6888dc 457 GETSHORT(prot, inp);
robert_jw 0:b2805b6888dc 458
robert_jw 0:b2805b6888dc 459 LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd Protocol-Reject packet for %x!\n", prot));
robert_jw 0:b2805b6888dc 460
robert_jw 0:b2805b6888dc 461 /*
robert_jw 0:b2805b6888dc 462 * Protocol-Reject packets received in any state other than the LCP
robert_jw 0:b2805b6888dc 463 * LS_OPENED state SHOULD be silently discarded.
robert_jw 0:b2805b6888dc 464 */
robert_jw 0:b2805b6888dc 465 if( f->state != LS_OPENED ) {
robert_jw 0:b2805b6888dc 466 LCPDEBUG(LOG_INFO, ("Protocol-Reject discarded: LCP in state %d\n", f->state));
robert_jw 0:b2805b6888dc 467 return;
robert_jw 0:b2805b6888dc 468 }
robert_jw 0:b2805b6888dc 469
robert_jw 0:b2805b6888dc 470 /*
robert_jw 0:b2805b6888dc 471 * Upcall the proper Protocol-Reject routine.
robert_jw 0:b2805b6888dc 472 */
robert_jw 0:b2805b6888dc 473 for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
robert_jw 0:b2805b6888dc 474 if (protp->protocol == prot && protp->enabled_flag) {
robert_jw 0:b2805b6888dc 475 (*protp->protrej)(f->unit);
robert_jw 0:b2805b6888dc 476 return;
robert_jw 0:b2805b6888dc 477 }
robert_jw 0:b2805b6888dc 478 }
robert_jw 0:b2805b6888dc 479
robert_jw 0:b2805b6888dc 480 LCPDEBUG(LOG_WARNING, ("Protocol-Reject for unsupported protocol 0x%x\n", prot));
robert_jw 0:b2805b6888dc 481 }
robert_jw 0:b2805b6888dc 482
robert_jw 0:b2805b6888dc 483
robert_jw 0:b2805b6888dc 484 /*
robert_jw 0:b2805b6888dc 485 * lcp_protrej - A Protocol-Reject was received.
robert_jw 0:b2805b6888dc 486 */
robert_jw 0:b2805b6888dc 487 static void
robert_jw 0:b2805b6888dc 488 lcp_protrej(int unit)
robert_jw 0:b2805b6888dc 489 {
robert_jw 0:b2805b6888dc 490 LWIP_UNUSED_ARG(unit);
robert_jw 0:b2805b6888dc 491 /*
robert_jw 0:b2805b6888dc 492 * Can't reject LCP!
robert_jw 0:b2805b6888dc 493 */
robert_jw 0:b2805b6888dc 494 LCPDEBUG(LOG_WARNING, ("lcp_protrej: Received Protocol-Reject for LCP!\n"));
robert_jw 0:b2805b6888dc 495 fsm_protreject(&lcp_fsm[unit]);
robert_jw 0:b2805b6888dc 496 }
robert_jw 0:b2805b6888dc 497
robert_jw 0:b2805b6888dc 498
robert_jw 0:b2805b6888dc 499 /*
robert_jw 0:b2805b6888dc 500 * lcp_sprotrej - Send a Protocol-Reject for some protocol.
robert_jw 0:b2805b6888dc 501 */
robert_jw 0:b2805b6888dc 502 void
robert_jw 0:b2805b6888dc 503 lcp_sprotrej(int unit, u_char *p, int len)
robert_jw 0:b2805b6888dc 504 {
robert_jw 0:b2805b6888dc 505 /*
robert_jw 0:b2805b6888dc 506 * Send back the protocol and the information field of the
robert_jw 0:b2805b6888dc 507 * rejected packet. We only get here if LCP is in the LS_OPENED state.
robert_jw 0:b2805b6888dc 508 */
robert_jw 0:b2805b6888dc 509
robert_jw 0:b2805b6888dc 510 fsm_sdata(&lcp_fsm[unit], PROTREJ, ++lcp_fsm[unit].id, p, len);
robert_jw 0:b2805b6888dc 511 }
robert_jw 0:b2805b6888dc 512
robert_jw 0:b2805b6888dc 513
robert_jw 0:b2805b6888dc 514 /*
robert_jw 0:b2805b6888dc 515 * lcp_resetci - Reset our CI.
robert_jw 0:b2805b6888dc 516 */
robert_jw 0:b2805b6888dc 517 static void
robert_jw 0:b2805b6888dc 518 lcp_resetci(fsm *f)
robert_jw 0:b2805b6888dc 519 {
robert_jw 0:b2805b6888dc 520 lcp_wantoptions[f->unit].magicnumber = magic();
robert_jw 0:b2805b6888dc 521 lcp_wantoptions[f->unit].numloops = 0;
robert_jw 0:b2805b6888dc 522 lcp_gotoptions[f->unit] = lcp_wantoptions[f->unit];
robert_jw 0:b2805b6888dc 523 peer_mru[f->unit] = PPP_MRU;
robert_jw 0:b2805b6888dc 524 auth_reset(f->unit);
robert_jw 0:b2805b6888dc 525 }
robert_jw 0:b2805b6888dc 526
robert_jw 0:b2805b6888dc 527
robert_jw 0:b2805b6888dc 528 /*
robert_jw 0:b2805b6888dc 529 * lcp_cilen - Return length of our CI.
robert_jw 0:b2805b6888dc 530 */
robert_jw 0:b2805b6888dc 531 static int
robert_jw 0:b2805b6888dc 532 lcp_cilen(fsm *f)
robert_jw 0:b2805b6888dc 533 {
robert_jw 0:b2805b6888dc 534 lcp_options *go = &lcp_gotoptions[f->unit];
robert_jw 0:b2805b6888dc 535
robert_jw 0:b2805b6888dc 536 #define LENCIVOID(neg) ((neg) ? CILEN_VOID : 0)
robert_jw 0:b2805b6888dc 537 #define LENCICHAP(neg) ((neg) ? CILEN_CHAP : 0)
robert_jw 0:b2805b6888dc 538 #define LENCISHORT(neg) ((neg) ? CILEN_SHORT : 0)
robert_jw 0:b2805b6888dc 539 #define LENCILONG(neg) ((neg) ? CILEN_LONG : 0)
robert_jw 0:b2805b6888dc 540 #define LENCILQR(neg) ((neg) ? CILEN_LQR: 0)
robert_jw 0:b2805b6888dc 541 #define LENCICBCP(neg) ((neg) ? CILEN_CBCP: 0)
robert_jw 0:b2805b6888dc 542 /*
robert_jw 0:b2805b6888dc 543 * NB: we only ask for one of CHAP and UPAP, even if we will
robert_jw 0:b2805b6888dc 544 * accept either.
robert_jw 0:b2805b6888dc 545 */
robert_jw 0:b2805b6888dc 546 return (LENCISHORT(go->neg_mru && go->mru != PPP_DEFMRU) +
robert_jw 0:b2805b6888dc 547 LENCILONG(go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) +
robert_jw 0:b2805b6888dc 548 LENCICHAP(go->neg_chap) +
robert_jw 0:b2805b6888dc 549 LENCISHORT(!go->neg_chap && go->neg_upap) +
robert_jw 0:b2805b6888dc 550 LENCILQR(go->neg_lqr) +
robert_jw 0:b2805b6888dc 551 LENCICBCP(go->neg_cbcp) +
robert_jw 0:b2805b6888dc 552 LENCILONG(go->neg_magicnumber) +
robert_jw 0:b2805b6888dc 553 LENCIVOID(go->neg_pcompression) +
robert_jw 0:b2805b6888dc 554 LENCIVOID(go->neg_accompression));
robert_jw 0:b2805b6888dc 555 }
robert_jw 0:b2805b6888dc 556
robert_jw 0:b2805b6888dc 557
robert_jw 0:b2805b6888dc 558 /*
robert_jw 0:b2805b6888dc 559 * lcp_addci - Add our desired CIs to a packet.
robert_jw 0:b2805b6888dc 560 */
robert_jw 0:b2805b6888dc 561 static void
robert_jw 0:b2805b6888dc 562 lcp_addci(fsm *f, u_char *ucp, int *lenp)
robert_jw 0:b2805b6888dc 563 {
robert_jw 0:b2805b6888dc 564 lcp_options *go = &lcp_gotoptions[f->unit];
robert_jw 0:b2805b6888dc 565 u_char *start_ucp = ucp;
robert_jw 0:b2805b6888dc 566
robert_jw 0:b2805b6888dc 567 #define ADDCIVOID(opt, neg) \
robert_jw 0:b2805b6888dc 568 if (neg) { \
robert_jw 0:b2805b6888dc 569 LCPDEBUG(LOG_INFO, ("lcp_addci: opt=%d\n", opt)); \
robert_jw 0:b2805b6888dc 570 PUTCHAR(opt, ucp); \
robert_jw 0:b2805b6888dc 571 PUTCHAR(CILEN_VOID, ucp); \
robert_jw 0:b2805b6888dc 572 }
robert_jw 0:b2805b6888dc 573 #define ADDCISHORT(opt, neg, val) \
robert_jw 0:b2805b6888dc 574 if (neg) { \
robert_jw 0:b2805b6888dc 575 LCPDEBUG(LOG_INFO, ("lcp_addci: INT opt=%d %X\n", opt, val)); \
robert_jw 0:b2805b6888dc 576 PUTCHAR(opt, ucp); \
robert_jw 0:b2805b6888dc 577 PUTCHAR(CILEN_SHORT, ucp); \
robert_jw 0:b2805b6888dc 578 PUTSHORT(val, ucp); \
robert_jw 0:b2805b6888dc 579 }
robert_jw 0:b2805b6888dc 580 #define ADDCICHAP(opt, neg, val, digest) \
robert_jw 0:b2805b6888dc 581 if (neg) { \
robert_jw 0:b2805b6888dc 582 LCPDEBUG(LOG_INFO, ("lcp_addci: CHAP opt=%d %X\n", opt, val)); \
robert_jw 0:b2805b6888dc 583 PUTCHAR(opt, ucp); \
robert_jw 0:b2805b6888dc 584 PUTCHAR(CILEN_CHAP, ucp); \
robert_jw 0:b2805b6888dc 585 PUTSHORT(val, ucp); \
robert_jw 0:b2805b6888dc 586 PUTCHAR(digest, ucp); \
robert_jw 0:b2805b6888dc 587 }
robert_jw 0:b2805b6888dc 588 #define ADDCILONG(opt, neg, val) \
robert_jw 0:b2805b6888dc 589 if (neg) { \
robert_jw 0:b2805b6888dc 590 LCPDEBUG(LOG_INFO, ("lcp_addci: L opt=%d %lX\n", opt, val)); \
robert_jw 0:b2805b6888dc 591 PUTCHAR(opt, ucp); \
robert_jw 0:b2805b6888dc 592 PUTCHAR(CILEN_LONG, ucp); \
robert_jw 0:b2805b6888dc 593 PUTLONG(val, ucp); \
robert_jw 0:b2805b6888dc 594 }
robert_jw 0:b2805b6888dc 595 #define ADDCILQR(opt, neg, val) \
robert_jw 0:b2805b6888dc 596 if (neg) { \
robert_jw 0:b2805b6888dc 597 LCPDEBUG(LOG_INFO, ("lcp_addci: LQR opt=%d %lX\n", opt, val)); \
robert_jw 0:b2805b6888dc 598 PUTCHAR(opt, ucp); \
robert_jw 0:b2805b6888dc 599 PUTCHAR(CILEN_LQR, ucp); \
robert_jw 0:b2805b6888dc 600 PUTSHORT(PPP_LQR, ucp); \
robert_jw 0:b2805b6888dc 601 PUTLONG(val, ucp); \
robert_jw 0:b2805b6888dc 602 }
robert_jw 0:b2805b6888dc 603 #define ADDCICHAR(opt, neg, val) \
robert_jw 0:b2805b6888dc 604 if (neg) { \
robert_jw 0:b2805b6888dc 605 LCPDEBUG(LOG_INFO, ("lcp_addci: CHAR opt=%d %X '%z'\n", opt, val, val)); \
robert_jw 0:b2805b6888dc 606 PUTCHAR(opt, ucp); \
robert_jw 0:b2805b6888dc 607 PUTCHAR(CILEN_CHAR, ucp); \
robert_jw 0:b2805b6888dc 608 PUTCHAR(val, ucp); \
robert_jw 0:b2805b6888dc 609 }
robert_jw 0:b2805b6888dc 610
robert_jw 0:b2805b6888dc 611 ADDCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
robert_jw 0:b2805b6888dc 612 ADDCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
robert_jw 0:b2805b6888dc 613 ADDCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
robert_jw 0:b2805b6888dc 614 ADDCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
robert_jw 0:b2805b6888dc 615 ADDCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
robert_jw 0:b2805b6888dc 616 ADDCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
robert_jw 0:b2805b6888dc 617 ADDCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
robert_jw 0:b2805b6888dc 618 ADDCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
robert_jw 0:b2805b6888dc 619 ADDCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
robert_jw 0:b2805b6888dc 620
robert_jw 0:b2805b6888dc 621 if (ucp - start_ucp != *lenp) {
robert_jw 0:b2805b6888dc 622 /* this should never happen, because peer_mtu should be 1500 */
robert_jw 0:b2805b6888dc 623 LCPDEBUG(LOG_ERR, ("Bug in lcp_addci: wrong length\n"));
robert_jw 0:b2805b6888dc 624 }
robert_jw 0:b2805b6888dc 625 }
robert_jw 0:b2805b6888dc 626
robert_jw 0:b2805b6888dc 627
robert_jw 0:b2805b6888dc 628 /*
robert_jw 0:b2805b6888dc 629 * lcp_ackci - Ack our CIs.
robert_jw 0:b2805b6888dc 630 * This should not modify any state if the Ack is bad.
robert_jw 0:b2805b6888dc 631 *
robert_jw 0:b2805b6888dc 632 * Returns:
robert_jw 0:b2805b6888dc 633 * 0 - Ack was bad.
robert_jw 0:b2805b6888dc 634 * 1 - Ack was good.
robert_jw 0:b2805b6888dc 635 */
robert_jw 0:b2805b6888dc 636 static int
robert_jw 0:b2805b6888dc 637 lcp_ackci(fsm *f, u_char *p, int len)
robert_jw 0:b2805b6888dc 638 {
robert_jw 0:b2805b6888dc 639 lcp_options *go = &lcp_gotoptions[f->unit];
robert_jw 0:b2805b6888dc 640 u_char cilen, citype, cichar;
robert_jw 0:b2805b6888dc 641 u_short cishort;
robert_jw 0:b2805b6888dc 642 u32_t cilong;
robert_jw 0:b2805b6888dc 643
robert_jw 0:b2805b6888dc 644 /*
robert_jw 0:b2805b6888dc 645 * CIs must be in exactly the same order that we sent.
robert_jw 0:b2805b6888dc 646 * Check packet length and CI length at each step.
robert_jw 0:b2805b6888dc 647 * If we find any deviations, then this packet is bad.
robert_jw 0:b2805b6888dc 648 */
robert_jw 0:b2805b6888dc 649 #define ACKCIVOID(opt, neg) \
robert_jw 0:b2805b6888dc 650 if (neg) { \
robert_jw 0:b2805b6888dc 651 if ((len -= CILEN_VOID) < 0) \
robert_jw 0:b2805b6888dc 652 goto bad; \
robert_jw 0:b2805b6888dc 653 GETCHAR(citype, p); \
robert_jw 0:b2805b6888dc 654 GETCHAR(cilen, p); \
robert_jw 0:b2805b6888dc 655 if (cilen != CILEN_VOID || citype != opt) \
robert_jw 0:b2805b6888dc 656 goto bad; \
robert_jw 0:b2805b6888dc 657 }
robert_jw 0:b2805b6888dc 658 #define ACKCISHORT(opt, neg, val) \
robert_jw 0:b2805b6888dc 659 if (neg) { \
robert_jw 0:b2805b6888dc 660 if ((len -= CILEN_SHORT) < 0) \
robert_jw 0:b2805b6888dc 661 goto bad; \
robert_jw 0:b2805b6888dc 662 GETCHAR(citype, p); \
robert_jw 0:b2805b6888dc 663 GETCHAR(cilen, p); \
robert_jw 0:b2805b6888dc 664 if (cilen != CILEN_SHORT || citype != opt) \
robert_jw 0:b2805b6888dc 665 goto bad; \
robert_jw 0:b2805b6888dc 666 GETSHORT(cishort, p); \
robert_jw 0:b2805b6888dc 667 if (cishort != val) \
robert_jw 0:b2805b6888dc 668 goto bad; \
robert_jw 0:b2805b6888dc 669 }
robert_jw 0:b2805b6888dc 670 #define ACKCICHAR(opt, neg, val) \
robert_jw 0:b2805b6888dc 671 if (neg) { \
robert_jw 0:b2805b6888dc 672 if ((len -= CILEN_CHAR) < 0) \
robert_jw 0:b2805b6888dc 673 goto bad; \
robert_jw 0:b2805b6888dc 674 GETCHAR(citype, p); \
robert_jw 0:b2805b6888dc 675 GETCHAR(cilen, p); \
robert_jw 0:b2805b6888dc 676 if (cilen != CILEN_CHAR || citype != opt) \
robert_jw 0:b2805b6888dc 677 goto bad; \
robert_jw 0:b2805b6888dc 678 GETCHAR(cichar, p); \
robert_jw 0:b2805b6888dc 679 if (cichar != val) \
robert_jw 0:b2805b6888dc 680 goto bad; \
robert_jw 0:b2805b6888dc 681 }
robert_jw 0:b2805b6888dc 682 #define ACKCICHAP(opt, neg, val, digest) \
robert_jw 0:b2805b6888dc 683 if (neg) { \
robert_jw 0:b2805b6888dc 684 if ((len -= CILEN_CHAP) < 0) \
robert_jw 0:b2805b6888dc 685 goto bad; \
robert_jw 0:b2805b6888dc 686 GETCHAR(citype, p); \
robert_jw 0:b2805b6888dc 687 GETCHAR(cilen, p); \
robert_jw 0:b2805b6888dc 688 if (cilen != CILEN_CHAP || citype != opt) \
robert_jw 0:b2805b6888dc 689 goto bad; \
robert_jw 0:b2805b6888dc 690 GETSHORT(cishort, p); \
robert_jw 0:b2805b6888dc 691 if (cishort != val) \
robert_jw 0:b2805b6888dc 692 goto bad; \
robert_jw 0:b2805b6888dc 693 GETCHAR(cichar, p); \
robert_jw 0:b2805b6888dc 694 if (cichar != digest) \
robert_jw 0:b2805b6888dc 695 goto bad; \
robert_jw 0:b2805b6888dc 696 }
robert_jw 0:b2805b6888dc 697 #define ACKCILONG(opt, neg, val) \
robert_jw 0:b2805b6888dc 698 if (neg) { \
robert_jw 0:b2805b6888dc 699 if ((len -= CILEN_LONG) < 0) \
robert_jw 0:b2805b6888dc 700 goto bad; \
robert_jw 0:b2805b6888dc 701 GETCHAR(citype, p); \
robert_jw 0:b2805b6888dc 702 GETCHAR(cilen, p); \
robert_jw 0:b2805b6888dc 703 if (cilen != CILEN_LONG || citype != opt) \
robert_jw 0:b2805b6888dc 704 goto bad; \
robert_jw 0:b2805b6888dc 705 GETLONG(cilong, p); \
robert_jw 0:b2805b6888dc 706 if (cilong != val) \
robert_jw 0:b2805b6888dc 707 goto bad; \
robert_jw 0:b2805b6888dc 708 }
robert_jw 0:b2805b6888dc 709 #define ACKCILQR(opt, neg, val) \
robert_jw 0:b2805b6888dc 710 if (neg) { \
robert_jw 0:b2805b6888dc 711 if ((len -= CILEN_LQR) < 0) \
robert_jw 0:b2805b6888dc 712 goto bad; \
robert_jw 0:b2805b6888dc 713 GETCHAR(citype, p); \
robert_jw 0:b2805b6888dc 714 GETCHAR(cilen, p); \
robert_jw 0:b2805b6888dc 715 if (cilen != CILEN_LQR || citype != opt) \
robert_jw 0:b2805b6888dc 716 goto bad; \
robert_jw 0:b2805b6888dc 717 GETSHORT(cishort, p); \
robert_jw 0:b2805b6888dc 718 if (cishort != PPP_LQR) \
robert_jw 0:b2805b6888dc 719 goto bad; \
robert_jw 0:b2805b6888dc 720 GETLONG(cilong, p); \
robert_jw 0:b2805b6888dc 721 if (cilong != val) \
robert_jw 0:b2805b6888dc 722 goto bad; \
robert_jw 0:b2805b6888dc 723 }
robert_jw 0:b2805b6888dc 724
robert_jw 0:b2805b6888dc 725 ACKCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
robert_jw 0:b2805b6888dc 726 ACKCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
robert_jw 0:b2805b6888dc 727 ACKCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
robert_jw 0:b2805b6888dc 728 ACKCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
robert_jw 0:b2805b6888dc 729 ACKCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
robert_jw 0:b2805b6888dc 730 ACKCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
robert_jw 0:b2805b6888dc 731 ACKCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
robert_jw 0:b2805b6888dc 732 ACKCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
robert_jw 0:b2805b6888dc 733 ACKCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
robert_jw 0:b2805b6888dc 734
robert_jw 0:b2805b6888dc 735 /*
robert_jw 0:b2805b6888dc 736 * If there are any remaining CIs, then this packet is bad.
robert_jw 0:b2805b6888dc 737 */
robert_jw 0:b2805b6888dc 738 if (len != 0) {
robert_jw 0:b2805b6888dc 739 goto bad;
robert_jw 0:b2805b6888dc 740 }
robert_jw 0:b2805b6888dc 741 LCPDEBUG(LOG_INFO, ("lcp_acki: Ack\n"));
robert_jw 0:b2805b6888dc 742 return (1);
robert_jw 0:b2805b6888dc 743 bad:
robert_jw 0:b2805b6888dc 744 LCPDEBUG(LOG_WARNING, ("lcp_acki: received bad Ack!\n"));
robert_jw 0:b2805b6888dc 745 return (0);
robert_jw 0:b2805b6888dc 746 }
robert_jw 0:b2805b6888dc 747
robert_jw 0:b2805b6888dc 748
robert_jw 0:b2805b6888dc 749 /*
robert_jw 0:b2805b6888dc 750 * lcp_nakci - Peer has sent a NAK for some of our CIs.
robert_jw 0:b2805b6888dc 751 * This should not modify any state if the Nak is bad
robert_jw 0:b2805b6888dc 752 * or if LCP is in the LS_OPENED state.
robert_jw 0:b2805b6888dc 753 *
robert_jw 0:b2805b6888dc 754 * Returns:
robert_jw 0:b2805b6888dc 755 * 0 - Nak was bad.
robert_jw 0:b2805b6888dc 756 * 1 - Nak was good.
robert_jw 0:b2805b6888dc 757 */
robert_jw 0:b2805b6888dc 758 static int
robert_jw 0:b2805b6888dc 759 lcp_nakci(fsm *f, u_char *p, int len)
robert_jw 0:b2805b6888dc 760 {
robert_jw 0:b2805b6888dc 761 lcp_options *go = &lcp_gotoptions[f->unit];
robert_jw 0:b2805b6888dc 762 lcp_options *wo = &lcp_wantoptions[f->unit];
robert_jw 0:b2805b6888dc 763 u_char citype, cichar, *next;
robert_jw 0:b2805b6888dc 764 u_short cishort;
robert_jw 0:b2805b6888dc 765 u32_t cilong;
robert_jw 0:b2805b6888dc 766 lcp_options no; /* options we've seen Naks for */
robert_jw 0:b2805b6888dc 767 lcp_options try; /* options to request next time */
robert_jw 0:b2805b6888dc 768 int looped_back = 0;
robert_jw 0:b2805b6888dc 769 int cilen;
robert_jw 0:b2805b6888dc 770
robert_jw 0:b2805b6888dc 771 BZERO(&no, sizeof(no));
robert_jw 0:b2805b6888dc 772 try = *go;
robert_jw 0:b2805b6888dc 773
robert_jw 0:b2805b6888dc 774 /*
robert_jw 0:b2805b6888dc 775 * Any Nak'd CIs must be in exactly the same order that we sent.
robert_jw 0:b2805b6888dc 776 * Check packet length and CI length at each step.
robert_jw 0:b2805b6888dc 777 * If we find any deviations, then this packet is bad.
robert_jw 0:b2805b6888dc 778 */
robert_jw 0:b2805b6888dc 779 #define NAKCIVOID(opt, neg, code) \
robert_jw 0:b2805b6888dc 780 if (go->neg && \
robert_jw 0:b2805b6888dc 781 len >= CILEN_VOID && \
robert_jw 0:b2805b6888dc 782 p[1] == CILEN_VOID && \
robert_jw 0:b2805b6888dc 783 p[0] == opt) { \
robert_jw 0:b2805b6888dc 784 len -= CILEN_VOID; \
robert_jw 0:b2805b6888dc 785 INCPTR(CILEN_VOID, p); \
robert_jw 0:b2805b6888dc 786 no.neg = 1; \
robert_jw 0:b2805b6888dc 787 code \
robert_jw 0:b2805b6888dc 788 }
robert_jw 0:b2805b6888dc 789 #define NAKCICHAP(opt, neg, code) \
robert_jw 0:b2805b6888dc 790 if (go->neg && \
robert_jw 0:b2805b6888dc 791 len >= CILEN_CHAP && \
robert_jw 0:b2805b6888dc 792 p[1] == CILEN_CHAP && \
robert_jw 0:b2805b6888dc 793 p[0] == opt) { \
robert_jw 0:b2805b6888dc 794 len -= CILEN_CHAP; \
robert_jw 0:b2805b6888dc 795 INCPTR(2, p); \
robert_jw 0:b2805b6888dc 796 GETSHORT(cishort, p); \
robert_jw 0:b2805b6888dc 797 GETCHAR(cichar, p); \
robert_jw 0:b2805b6888dc 798 no.neg = 1; \
robert_jw 0:b2805b6888dc 799 code \
robert_jw 0:b2805b6888dc 800 }
robert_jw 0:b2805b6888dc 801 #define NAKCICHAR(opt, neg, code) \
robert_jw 0:b2805b6888dc 802 if (go->neg && \
robert_jw 0:b2805b6888dc 803 len >= CILEN_CHAR && \
robert_jw 0:b2805b6888dc 804 p[1] == CILEN_CHAR && \
robert_jw 0:b2805b6888dc 805 p[0] == opt) { \
robert_jw 0:b2805b6888dc 806 len -= CILEN_CHAR; \
robert_jw 0:b2805b6888dc 807 INCPTR(2, p); \
robert_jw 0:b2805b6888dc 808 GETCHAR(cichar, p); \
robert_jw 0:b2805b6888dc 809 no.neg = 1; \
robert_jw 0:b2805b6888dc 810 code \
robert_jw 0:b2805b6888dc 811 }
robert_jw 0:b2805b6888dc 812 #define NAKCISHORT(opt, neg, code) \
robert_jw 0:b2805b6888dc 813 if (go->neg && \
robert_jw 0:b2805b6888dc 814 len >= CILEN_SHORT && \
robert_jw 0:b2805b6888dc 815 p[1] == CILEN_SHORT && \
robert_jw 0:b2805b6888dc 816 p[0] == opt) { \
robert_jw 0:b2805b6888dc 817 len -= CILEN_SHORT; \
robert_jw 0:b2805b6888dc 818 INCPTR(2, p); \
robert_jw 0:b2805b6888dc 819 GETSHORT(cishort, p); \
robert_jw 0:b2805b6888dc 820 no.neg = 1; \
robert_jw 0:b2805b6888dc 821 code \
robert_jw 0:b2805b6888dc 822 }
robert_jw 0:b2805b6888dc 823 #define NAKCILONG(opt, neg, code) \
robert_jw 0:b2805b6888dc 824 if (go->neg && \
robert_jw 0:b2805b6888dc 825 len >= CILEN_LONG && \
robert_jw 0:b2805b6888dc 826 p[1] == CILEN_LONG && \
robert_jw 0:b2805b6888dc 827 p[0] == opt) { \
robert_jw 0:b2805b6888dc 828 len -= CILEN_LONG; \
robert_jw 0:b2805b6888dc 829 INCPTR(2, p); \
robert_jw 0:b2805b6888dc 830 GETLONG(cilong, p); \
robert_jw 0:b2805b6888dc 831 no.neg = 1; \
robert_jw 0:b2805b6888dc 832 code \
robert_jw 0:b2805b6888dc 833 }
robert_jw 0:b2805b6888dc 834 #define NAKCILQR(opt, neg, code) \
robert_jw 0:b2805b6888dc 835 if (go->neg && \
robert_jw 0:b2805b6888dc 836 len >= CILEN_LQR && \
robert_jw 0:b2805b6888dc 837 p[1] == CILEN_LQR && \
robert_jw 0:b2805b6888dc 838 p[0] == opt) { \
robert_jw 0:b2805b6888dc 839 len -= CILEN_LQR; \
robert_jw 0:b2805b6888dc 840 INCPTR(2, p); \
robert_jw 0:b2805b6888dc 841 GETSHORT(cishort, p); \
robert_jw 0:b2805b6888dc 842 GETLONG(cilong, p); \
robert_jw 0:b2805b6888dc 843 no.neg = 1; \
robert_jw 0:b2805b6888dc 844 code \
robert_jw 0:b2805b6888dc 845 }
robert_jw 0:b2805b6888dc 846
robert_jw 0:b2805b6888dc 847 /*
robert_jw 0:b2805b6888dc 848 * We don't care if they want to send us smaller packets than
robert_jw 0:b2805b6888dc 849 * we want. Therefore, accept any MRU less than what we asked for,
robert_jw 0:b2805b6888dc 850 * but then ignore the new value when setting the MRU in the kernel.
robert_jw 0:b2805b6888dc 851 * If they send us a bigger MRU than what we asked, accept it, up to
robert_jw 0:b2805b6888dc 852 * the limit of the default MRU we'd get if we didn't negotiate.
robert_jw 0:b2805b6888dc 853 */
robert_jw 0:b2805b6888dc 854 if (go->neg_mru && go->mru != PPP_DEFMRU) {
robert_jw 0:b2805b6888dc 855 NAKCISHORT(CI_MRU, neg_mru,
robert_jw 0:b2805b6888dc 856 if (cishort <= wo->mru || cishort < PPP_DEFMRU) {
robert_jw 0:b2805b6888dc 857 try.mru = cishort;
robert_jw 0:b2805b6888dc 858 }
robert_jw 0:b2805b6888dc 859 );
robert_jw 0:b2805b6888dc 860 }
robert_jw 0:b2805b6888dc 861
robert_jw 0:b2805b6888dc 862 /*
robert_jw 0:b2805b6888dc 863 * Add any characters they want to our (receive-side) asyncmap.
robert_jw 0:b2805b6888dc 864 */
robert_jw 0:b2805b6888dc 865 if (go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) {
robert_jw 0:b2805b6888dc 866 NAKCILONG(CI_ASYNCMAP, neg_asyncmap,
robert_jw 0:b2805b6888dc 867 try.asyncmap = go->asyncmap | cilong;
robert_jw 0:b2805b6888dc 868 );
robert_jw 0:b2805b6888dc 869 }
robert_jw 0:b2805b6888dc 870
robert_jw 0:b2805b6888dc 871 /*
robert_jw 0:b2805b6888dc 872 * If they've nak'd our authentication-protocol, check whether
robert_jw 0:b2805b6888dc 873 * they are proposing a different protocol, or a different
robert_jw 0:b2805b6888dc 874 * hash algorithm for CHAP.
robert_jw 0:b2805b6888dc 875 */
robert_jw 0:b2805b6888dc 876 if ((go->neg_chap || go->neg_upap)
robert_jw 0:b2805b6888dc 877 && len >= CILEN_SHORT
robert_jw 0:b2805b6888dc 878 && p[0] == CI_AUTHTYPE && p[1] >= CILEN_SHORT && p[1] <= len) {
robert_jw 0:b2805b6888dc 879 cilen = p[1];
robert_jw 0:b2805b6888dc 880 len -= cilen;
robert_jw 0:b2805b6888dc 881 no.neg_chap = go->neg_chap;
robert_jw 0:b2805b6888dc 882 no.neg_upap = go->neg_upap;
robert_jw 0:b2805b6888dc 883 INCPTR(2, p);
robert_jw 0:b2805b6888dc 884 GETSHORT(cishort, p);
robert_jw 0:b2805b6888dc 885 if (cishort == PPP_PAP && cilen == CILEN_SHORT) {
robert_jw 0:b2805b6888dc 886 /*
robert_jw 0:b2805b6888dc 887 * If we were asking for CHAP, they obviously don't want to do it.
robert_jw 0:b2805b6888dc 888 * If we weren't asking for CHAP, then we were asking for PAP,
robert_jw 0:b2805b6888dc 889 * in which case this Nak is bad.
robert_jw 0:b2805b6888dc 890 */
robert_jw 0:b2805b6888dc 891 if (!go->neg_chap) {
robert_jw 0:b2805b6888dc 892 goto bad;
robert_jw 0:b2805b6888dc 893 }
robert_jw 0:b2805b6888dc 894 try.neg_chap = 0;
robert_jw 0:b2805b6888dc 895
robert_jw 0:b2805b6888dc 896 } else if (cishort == PPP_CHAP && cilen == CILEN_CHAP) {
robert_jw 0:b2805b6888dc 897 GETCHAR(cichar, p);
robert_jw 0:b2805b6888dc 898 if (go->neg_chap) {
robert_jw 0:b2805b6888dc 899 /*
robert_jw 0:b2805b6888dc 900 * We were asking for CHAP/MD5; they must want a different
robert_jw 0:b2805b6888dc 901 * algorithm. If they can't do MD5, we'll have to stop
robert_jw 0:b2805b6888dc 902 * asking for CHAP.
robert_jw 0:b2805b6888dc 903 */
robert_jw 0:b2805b6888dc 904 if (cichar != go->chap_mdtype) {
robert_jw 0:b2805b6888dc 905 try.neg_chap = 0;
robert_jw 0:b2805b6888dc 906 }
robert_jw 0:b2805b6888dc 907 } else {
robert_jw 0:b2805b6888dc 908 /*
robert_jw 0:b2805b6888dc 909 * Stop asking for PAP if we were asking for it.
robert_jw 0:b2805b6888dc 910 */
robert_jw 0:b2805b6888dc 911 try.neg_upap = 0;
robert_jw 0:b2805b6888dc 912 }
robert_jw 0:b2805b6888dc 913
robert_jw 0:b2805b6888dc 914 } else {
robert_jw 0:b2805b6888dc 915 /*
robert_jw 0:b2805b6888dc 916 * We don't recognize what they're suggesting.
robert_jw 0:b2805b6888dc 917 * Stop asking for what we were asking for.
robert_jw 0:b2805b6888dc 918 */
robert_jw 0:b2805b6888dc 919 if (go->neg_chap) {
robert_jw 0:b2805b6888dc 920 try.neg_chap = 0;
robert_jw 0:b2805b6888dc 921 } else {
robert_jw 0:b2805b6888dc 922 try.neg_upap = 0;
robert_jw 0:b2805b6888dc 923 }
robert_jw 0:b2805b6888dc 924 p += cilen - CILEN_SHORT;
robert_jw 0:b2805b6888dc 925 }
robert_jw 0:b2805b6888dc 926 }
robert_jw 0:b2805b6888dc 927
robert_jw 0:b2805b6888dc 928 /*
robert_jw 0:b2805b6888dc 929 * If they can't cope with our link quality protocol, we'll have
robert_jw 0:b2805b6888dc 930 * to stop asking for LQR. We haven't got any other protocol.
robert_jw 0:b2805b6888dc 931 * If they Nak the reporting period, take their value XXX ?
robert_jw 0:b2805b6888dc 932 */
robert_jw 0:b2805b6888dc 933 NAKCILQR(CI_QUALITY, neg_lqr,
robert_jw 0:b2805b6888dc 934 if (cishort != PPP_LQR) {
robert_jw 0:b2805b6888dc 935 try.neg_lqr = 0;
robert_jw 0:b2805b6888dc 936 } else {
robert_jw 0:b2805b6888dc 937 try.lqr_period = cilong;
robert_jw 0:b2805b6888dc 938 }
robert_jw 0:b2805b6888dc 939 );
robert_jw 0:b2805b6888dc 940
robert_jw 0:b2805b6888dc 941 /*
robert_jw 0:b2805b6888dc 942 * Only implementing CBCP...not the rest of the callback options
robert_jw 0:b2805b6888dc 943 */
robert_jw 0:b2805b6888dc 944 NAKCICHAR(CI_CALLBACK, neg_cbcp,
robert_jw 0:b2805b6888dc 945 try.neg_cbcp = 0;
robert_jw 0:b2805b6888dc 946 );
robert_jw 0:b2805b6888dc 947
robert_jw 0:b2805b6888dc 948 /*
robert_jw 0:b2805b6888dc 949 * Check for a looped-back line.
robert_jw 0:b2805b6888dc 950 */
robert_jw 0:b2805b6888dc 951 NAKCILONG(CI_MAGICNUMBER, neg_magicnumber,
robert_jw 0:b2805b6888dc 952 try.magicnumber = magic();
robert_jw 0:b2805b6888dc 953 looped_back = 1;
robert_jw 0:b2805b6888dc 954 );
robert_jw 0:b2805b6888dc 955
robert_jw 0:b2805b6888dc 956 /*
robert_jw 0:b2805b6888dc 957 * Peer shouldn't send Nak for protocol compression or
robert_jw 0:b2805b6888dc 958 * address/control compression requests; they should send
robert_jw 0:b2805b6888dc 959 * a Reject instead. If they send a Nak, treat it as a Reject.
robert_jw 0:b2805b6888dc 960 */
robert_jw 0:b2805b6888dc 961 NAKCIVOID(CI_PCOMPRESSION, neg_pcompression,
robert_jw 0:b2805b6888dc 962 try.neg_pcompression = 0;
robert_jw 0:b2805b6888dc 963 );
robert_jw 0:b2805b6888dc 964 NAKCIVOID(CI_ACCOMPRESSION, neg_accompression,
robert_jw 0:b2805b6888dc 965 try.neg_accompression = 0;
robert_jw 0:b2805b6888dc 966 );
robert_jw 0:b2805b6888dc 967
robert_jw 0:b2805b6888dc 968 /*
robert_jw 0:b2805b6888dc 969 * There may be remaining CIs, if the peer is requesting negotiation
robert_jw 0:b2805b6888dc 970 * on an option that we didn't include in our request packet.
robert_jw 0:b2805b6888dc 971 * If we see an option that we requested, or one we've already seen
robert_jw 0:b2805b6888dc 972 * in this packet, then this packet is bad.
robert_jw 0:b2805b6888dc 973 * If we wanted to respond by starting to negotiate on the requested
robert_jw 0:b2805b6888dc 974 * option(s), we could, but we don't, because except for the
robert_jw 0:b2805b6888dc 975 * authentication type and quality protocol, if we are not negotiating
robert_jw 0:b2805b6888dc 976 * an option, it is because we were told not to.
robert_jw 0:b2805b6888dc 977 * For the authentication type, the Nak from the peer means
robert_jw 0:b2805b6888dc 978 * `let me authenticate myself with you' which is a bit pointless.
robert_jw 0:b2805b6888dc 979 * For the quality protocol, the Nak means `ask me to send you quality
robert_jw 0:b2805b6888dc 980 * reports', but if we didn't ask for them, we don't want them.
robert_jw 0:b2805b6888dc 981 * An option we don't recognize represents the peer asking to
robert_jw 0:b2805b6888dc 982 * negotiate some option we don't support, so ignore it.
robert_jw 0:b2805b6888dc 983 */
robert_jw 0:b2805b6888dc 984 while (len > CILEN_VOID) {
robert_jw 0:b2805b6888dc 985 GETCHAR(citype, p);
robert_jw 0:b2805b6888dc 986 GETCHAR(cilen, p);
robert_jw 0:b2805b6888dc 987 if (cilen < CILEN_VOID || (len -= cilen) < 0) {
robert_jw 0:b2805b6888dc 988 goto bad;
robert_jw 0:b2805b6888dc 989 }
robert_jw 0:b2805b6888dc 990 next = p + cilen - 2;
robert_jw 0:b2805b6888dc 991
robert_jw 0:b2805b6888dc 992 switch (citype) {
robert_jw 0:b2805b6888dc 993 case CI_MRU:
robert_jw 0:b2805b6888dc 994 if ((go->neg_mru && go->mru != PPP_DEFMRU)
robert_jw 0:b2805b6888dc 995 || no.neg_mru || cilen != CILEN_SHORT) {
robert_jw 0:b2805b6888dc 996 goto bad;
robert_jw 0:b2805b6888dc 997 }
robert_jw 0:b2805b6888dc 998 GETSHORT(cishort, p);
robert_jw 0:b2805b6888dc 999 if (cishort < PPP_DEFMRU) {
robert_jw 0:b2805b6888dc 1000 try.mru = cishort;
robert_jw 0:b2805b6888dc 1001 }
robert_jw 0:b2805b6888dc 1002 break;
robert_jw 0:b2805b6888dc 1003 case CI_ASYNCMAP:
robert_jw 0:b2805b6888dc 1004 if ((go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl)
robert_jw 0:b2805b6888dc 1005 || no.neg_asyncmap || cilen != CILEN_LONG) {
robert_jw 0:b2805b6888dc 1006 goto bad;
robert_jw 0:b2805b6888dc 1007 }
robert_jw 0:b2805b6888dc 1008 break;
robert_jw 0:b2805b6888dc 1009 case CI_AUTHTYPE:
robert_jw 0:b2805b6888dc 1010 if (go->neg_chap || no.neg_chap || go->neg_upap || no.neg_upap) {
robert_jw 0:b2805b6888dc 1011 goto bad;
robert_jw 0:b2805b6888dc 1012 }
robert_jw 0:b2805b6888dc 1013 break;
robert_jw 0:b2805b6888dc 1014 case CI_MAGICNUMBER:
robert_jw 0:b2805b6888dc 1015 if (go->neg_magicnumber || no.neg_magicnumber ||
robert_jw 0:b2805b6888dc 1016 cilen != CILEN_LONG) {
robert_jw 0:b2805b6888dc 1017 goto bad;
robert_jw 0:b2805b6888dc 1018 }
robert_jw 0:b2805b6888dc 1019 break;
robert_jw 0:b2805b6888dc 1020 case CI_PCOMPRESSION:
robert_jw 0:b2805b6888dc 1021 if (go->neg_pcompression || no.neg_pcompression
robert_jw 0:b2805b6888dc 1022 || cilen != CILEN_VOID) {
robert_jw 0:b2805b6888dc 1023 goto bad;
robert_jw 0:b2805b6888dc 1024 }
robert_jw 0:b2805b6888dc 1025 break;
robert_jw 0:b2805b6888dc 1026 case CI_ACCOMPRESSION:
robert_jw 0:b2805b6888dc 1027 if (go->neg_accompression || no.neg_accompression
robert_jw 0:b2805b6888dc 1028 || cilen != CILEN_VOID) {
robert_jw 0:b2805b6888dc 1029 goto bad;
robert_jw 0:b2805b6888dc 1030 }
robert_jw 0:b2805b6888dc 1031 break;
robert_jw 0:b2805b6888dc 1032 case CI_QUALITY:
robert_jw 0:b2805b6888dc 1033 if (go->neg_lqr || no.neg_lqr || cilen != CILEN_LQR) {
robert_jw 0:b2805b6888dc 1034 goto bad;
robert_jw 0:b2805b6888dc 1035 }
robert_jw 0:b2805b6888dc 1036 break;
robert_jw 0:b2805b6888dc 1037 }
robert_jw 0:b2805b6888dc 1038 p = next;
robert_jw 0:b2805b6888dc 1039 }
robert_jw 0:b2805b6888dc 1040
robert_jw 0:b2805b6888dc 1041 /* If there is still anything left, this packet is bad. */
robert_jw 0:b2805b6888dc 1042 if (len != 0) {
robert_jw 0:b2805b6888dc 1043 goto bad;
robert_jw 0:b2805b6888dc 1044 }
robert_jw 0:b2805b6888dc 1045
robert_jw 0:b2805b6888dc 1046 /*
robert_jw 0:b2805b6888dc 1047 * OK, the Nak is good. Now we can update state.
robert_jw 0:b2805b6888dc 1048 */
robert_jw 0:b2805b6888dc 1049 if (f->state != LS_OPENED) {
robert_jw 0:b2805b6888dc 1050 if (looped_back) {
robert_jw 0:b2805b6888dc 1051 if (++try.numloops >= lcp_loopbackfail) {
robert_jw 0:b2805b6888dc 1052 LCPDEBUG(LOG_NOTICE, ("Serial line is looped back.\n"));
robert_jw 0:b2805b6888dc 1053 lcp_close(f->unit, "Loopback detected");
robert_jw 0:b2805b6888dc 1054 }
robert_jw 0:b2805b6888dc 1055 } else {
robert_jw 0:b2805b6888dc 1056 try.numloops = 0;
robert_jw 0:b2805b6888dc 1057 }
robert_jw 0:b2805b6888dc 1058 *go = try;
robert_jw 0:b2805b6888dc 1059 }
robert_jw 0:b2805b6888dc 1060
robert_jw 0:b2805b6888dc 1061 return 1;
robert_jw 0:b2805b6888dc 1062
robert_jw 0:b2805b6888dc 1063 bad:
robert_jw 0:b2805b6888dc 1064 LCPDEBUG(LOG_WARNING, ("lcp_nakci: received bad Nak!\n"));
robert_jw 0:b2805b6888dc 1065 return 0;
robert_jw 0:b2805b6888dc 1066 }
robert_jw 0:b2805b6888dc 1067
robert_jw 0:b2805b6888dc 1068
robert_jw 0:b2805b6888dc 1069 /*
robert_jw 0:b2805b6888dc 1070 * lcp_rejci - Peer has Rejected some of our CIs.
robert_jw 0:b2805b6888dc 1071 * This should not modify any state if the Reject is bad
robert_jw 0:b2805b6888dc 1072 * or if LCP is in the LS_OPENED state.
robert_jw 0:b2805b6888dc 1073 *
robert_jw 0:b2805b6888dc 1074 * Returns:
robert_jw 0:b2805b6888dc 1075 * 0 - Reject was bad.
robert_jw 0:b2805b6888dc 1076 * 1 - Reject was good.
robert_jw 0:b2805b6888dc 1077 */
robert_jw 0:b2805b6888dc 1078 static int
robert_jw 0:b2805b6888dc 1079 lcp_rejci(fsm *f, u_char *p, int len)
robert_jw 0:b2805b6888dc 1080 {
robert_jw 0:b2805b6888dc 1081 lcp_options *go = &lcp_gotoptions[f->unit];
robert_jw 0:b2805b6888dc 1082 u_char cichar;
robert_jw 0:b2805b6888dc 1083 u_short cishort;
robert_jw 0:b2805b6888dc 1084 u32_t cilong;
robert_jw 0:b2805b6888dc 1085 lcp_options try; /* options to request next time */
robert_jw 0:b2805b6888dc 1086
robert_jw 0:b2805b6888dc 1087 try = *go;
robert_jw 0:b2805b6888dc 1088
robert_jw 0:b2805b6888dc 1089 /*
robert_jw 0:b2805b6888dc 1090 * Any Rejected CIs must be in exactly the same order that we sent.
robert_jw 0:b2805b6888dc 1091 * Check packet length and CI length at each step.
robert_jw 0:b2805b6888dc 1092 * If we find any deviations, then this packet is bad.
robert_jw 0:b2805b6888dc 1093 */
robert_jw 0:b2805b6888dc 1094 #define REJCIVOID(opt, neg) \
robert_jw 0:b2805b6888dc 1095 if (go->neg && \
robert_jw 0:b2805b6888dc 1096 len >= CILEN_VOID && \
robert_jw 0:b2805b6888dc 1097 p[1] == CILEN_VOID && \
robert_jw 0:b2805b6888dc 1098 p[0] == opt) { \
robert_jw 0:b2805b6888dc 1099 len -= CILEN_VOID; \
robert_jw 0:b2805b6888dc 1100 INCPTR(CILEN_VOID, p); \
robert_jw 0:b2805b6888dc 1101 try.neg = 0; \
robert_jw 0:b2805b6888dc 1102 LCPDEBUG(LOG_INFO, ("lcp_rejci: void opt %d rejected\n", opt)); \
robert_jw 0:b2805b6888dc 1103 }
robert_jw 0:b2805b6888dc 1104 #define REJCISHORT(opt, neg, val) \
robert_jw 0:b2805b6888dc 1105 if (go->neg && \
robert_jw 0:b2805b6888dc 1106 len >= CILEN_SHORT && \
robert_jw 0:b2805b6888dc 1107 p[1] == CILEN_SHORT && \
robert_jw 0:b2805b6888dc 1108 p[0] == opt) { \
robert_jw 0:b2805b6888dc 1109 len -= CILEN_SHORT; \
robert_jw 0:b2805b6888dc 1110 INCPTR(2, p); \
robert_jw 0:b2805b6888dc 1111 GETSHORT(cishort, p); \
robert_jw 0:b2805b6888dc 1112 /* Check rejected value. */ \
robert_jw 0:b2805b6888dc 1113 if (cishort != val) { \
robert_jw 0:b2805b6888dc 1114 goto bad; \
robert_jw 0:b2805b6888dc 1115 } \
robert_jw 0:b2805b6888dc 1116 try.neg = 0; \
robert_jw 0:b2805b6888dc 1117 LCPDEBUG(LOG_INFO, ("lcp_rejci: short opt %d rejected\n", opt)); \
robert_jw 0:b2805b6888dc 1118 }
robert_jw 0:b2805b6888dc 1119 #define REJCICHAP(opt, neg, val, digest) \
robert_jw 0:b2805b6888dc 1120 if (go->neg && \
robert_jw 0:b2805b6888dc 1121 len >= CILEN_CHAP && \
robert_jw 0:b2805b6888dc 1122 p[1] == CILEN_CHAP && \
robert_jw 0:b2805b6888dc 1123 p[0] == opt) { \
robert_jw 0:b2805b6888dc 1124 len -= CILEN_CHAP; \
robert_jw 0:b2805b6888dc 1125 INCPTR(2, p); \
robert_jw 0:b2805b6888dc 1126 GETSHORT(cishort, p); \
robert_jw 0:b2805b6888dc 1127 GETCHAR(cichar, p); \
robert_jw 0:b2805b6888dc 1128 /* Check rejected value. */ \
robert_jw 0:b2805b6888dc 1129 if (cishort != val || cichar != digest) { \
robert_jw 0:b2805b6888dc 1130 goto bad; \
robert_jw 0:b2805b6888dc 1131 } \
robert_jw 0:b2805b6888dc 1132 try.neg = 0; \
robert_jw 0:b2805b6888dc 1133 try.neg_upap = 0; \
robert_jw 0:b2805b6888dc 1134 LCPDEBUG(LOG_INFO, ("lcp_rejci: chap opt %d rejected\n", opt)); \
robert_jw 0:b2805b6888dc 1135 }
robert_jw 0:b2805b6888dc 1136 #define REJCILONG(opt, neg, val) \
robert_jw 0:b2805b6888dc 1137 if (go->neg && \
robert_jw 0:b2805b6888dc 1138 len >= CILEN_LONG && \
robert_jw 0:b2805b6888dc 1139 p[1] == CILEN_LONG && \
robert_jw 0:b2805b6888dc 1140 p[0] == opt) { \
robert_jw 0:b2805b6888dc 1141 len -= CILEN_LONG; \
robert_jw 0:b2805b6888dc 1142 INCPTR(2, p); \
robert_jw 0:b2805b6888dc 1143 GETLONG(cilong, p); \
robert_jw 0:b2805b6888dc 1144 /* Check rejected value. */ \
robert_jw 0:b2805b6888dc 1145 if (cilong != val) { \
robert_jw 0:b2805b6888dc 1146 goto bad; \
robert_jw 0:b2805b6888dc 1147 } \
robert_jw 0:b2805b6888dc 1148 try.neg = 0; \
robert_jw 0:b2805b6888dc 1149 LCPDEBUG(LOG_INFO, ("lcp_rejci: long opt %d rejected\n", opt)); \
robert_jw 0:b2805b6888dc 1150 }
robert_jw 0:b2805b6888dc 1151 #define REJCILQR(opt, neg, val) \
robert_jw 0:b2805b6888dc 1152 if (go->neg && \
robert_jw 0:b2805b6888dc 1153 len >= CILEN_LQR && \
robert_jw 0:b2805b6888dc 1154 p[1] == CILEN_LQR && \
robert_jw 0:b2805b6888dc 1155 p[0] == opt) { \
robert_jw 0:b2805b6888dc 1156 len -= CILEN_LQR; \
robert_jw 0:b2805b6888dc 1157 INCPTR(2, p); \
robert_jw 0:b2805b6888dc 1158 GETSHORT(cishort, p); \
robert_jw 0:b2805b6888dc 1159 GETLONG(cilong, p); \
robert_jw 0:b2805b6888dc 1160 /* Check rejected value. */ \
robert_jw 0:b2805b6888dc 1161 if (cishort != PPP_LQR || cilong != val) { \
robert_jw 0:b2805b6888dc 1162 goto bad; \
robert_jw 0:b2805b6888dc 1163 } \
robert_jw 0:b2805b6888dc 1164 try.neg = 0; \
robert_jw 0:b2805b6888dc 1165 LCPDEBUG(LOG_INFO, ("lcp_rejci: LQR opt %d rejected\n", opt)); \
robert_jw 0:b2805b6888dc 1166 }
robert_jw 0:b2805b6888dc 1167 #define REJCICBCP(opt, neg, val) \
robert_jw 0:b2805b6888dc 1168 if (go->neg && \
robert_jw 0:b2805b6888dc 1169 len >= CILEN_CBCP && \
robert_jw 0:b2805b6888dc 1170 p[1] == CILEN_CBCP && \
robert_jw 0:b2805b6888dc 1171 p[0] == opt) { \
robert_jw 0:b2805b6888dc 1172 len -= CILEN_CBCP; \
robert_jw 0:b2805b6888dc 1173 INCPTR(2, p); \
robert_jw 0:b2805b6888dc 1174 GETCHAR(cichar, p); \
robert_jw 0:b2805b6888dc 1175 /* Check rejected value. */ \
robert_jw 0:b2805b6888dc 1176 if (cichar != val) { \
robert_jw 0:b2805b6888dc 1177 goto bad; \
robert_jw 0:b2805b6888dc 1178 } \
robert_jw 0:b2805b6888dc 1179 try.neg = 0; \
robert_jw 0:b2805b6888dc 1180 LCPDEBUG(LOG_INFO, ("lcp_rejci: Callback opt %d rejected\n", opt)); \
robert_jw 0:b2805b6888dc 1181 }
robert_jw 0:b2805b6888dc 1182
robert_jw 0:b2805b6888dc 1183 REJCISHORT(CI_MRU, neg_mru, go->mru);
robert_jw 0:b2805b6888dc 1184 REJCILONG(CI_ASYNCMAP, neg_asyncmap, go->asyncmap);
robert_jw 0:b2805b6888dc 1185 REJCICHAP(CI_AUTHTYPE, neg_chap, PPP_CHAP, go->chap_mdtype);
robert_jw 0:b2805b6888dc 1186 if (!go->neg_chap) {
robert_jw 0:b2805b6888dc 1187 REJCISHORT(CI_AUTHTYPE, neg_upap, PPP_PAP);
robert_jw 0:b2805b6888dc 1188 }
robert_jw 0:b2805b6888dc 1189 REJCILQR(CI_QUALITY, neg_lqr, go->lqr_period);
robert_jw 0:b2805b6888dc 1190 REJCICBCP(CI_CALLBACK, neg_cbcp, CBCP_OPT);
robert_jw 0:b2805b6888dc 1191 REJCILONG(CI_MAGICNUMBER, neg_magicnumber, go->magicnumber);
robert_jw 0:b2805b6888dc 1192 REJCIVOID(CI_PCOMPRESSION, neg_pcompression);
robert_jw 0:b2805b6888dc 1193 REJCIVOID(CI_ACCOMPRESSION, neg_accompression);
robert_jw 0:b2805b6888dc 1194
robert_jw 0:b2805b6888dc 1195 /*
robert_jw 0:b2805b6888dc 1196 * If there are any remaining CIs, then this packet is bad.
robert_jw 0:b2805b6888dc 1197 */
robert_jw 0:b2805b6888dc 1198 if (len != 0) {
robert_jw 0:b2805b6888dc 1199 goto bad;
robert_jw 0:b2805b6888dc 1200 }
robert_jw 0:b2805b6888dc 1201 /*
robert_jw 0:b2805b6888dc 1202 * Now we can update state.
robert_jw 0:b2805b6888dc 1203 */
robert_jw 0:b2805b6888dc 1204 if (f->state != LS_OPENED) {
robert_jw 0:b2805b6888dc 1205 *go = try;
robert_jw 0:b2805b6888dc 1206 }
robert_jw 0:b2805b6888dc 1207 return 1;
robert_jw 0:b2805b6888dc 1208
robert_jw 0:b2805b6888dc 1209 bad:
robert_jw 0:b2805b6888dc 1210 LCPDEBUG(LOG_WARNING, ("lcp_rejci: received bad Reject!\n"));
robert_jw 0:b2805b6888dc 1211 return 0;
robert_jw 0:b2805b6888dc 1212 }
robert_jw 0:b2805b6888dc 1213
robert_jw 0:b2805b6888dc 1214
robert_jw 0:b2805b6888dc 1215 /*
robert_jw 0:b2805b6888dc 1216 * lcp_reqci - Check the peer's requested CIs and send appropriate response.
robert_jw 0:b2805b6888dc 1217 *
robert_jw 0:b2805b6888dc 1218 * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
robert_jw 0:b2805b6888dc 1219 * appropriately. If reject_if_disagree is non-zero, doesn't return
robert_jw 0:b2805b6888dc 1220 * CONFNAK; returns CONFREJ if it can't return CONFACK.
robert_jw 0:b2805b6888dc 1221 */
robert_jw 0:b2805b6888dc 1222 static int
robert_jw 0:b2805b6888dc 1223 lcp_reqci(fsm *f,
robert_jw 0:b2805b6888dc 1224 u_char *inp, /* Requested CIs */
robert_jw 0:b2805b6888dc 1225 int *lenp, /* Length of requested CIs */
robert_jw 0:b2805b6888dc 1226 int reject_if_disagree)
robert_jw 0:b2805b6888dc 1227 {
robert_jw 0:b2805b6888dc 1228 lcp_options *go = &lcp_gotoptions[f->unit];
robert_jw 0:b2805b6888dc 1229 lcp_options *ho = &lcp_hisoptions[f->unit];
robert_jw 0:b2805b6888dc 1230 lcp_options *ao = &lcp_allowoptions[f->unit];
robert_jw 0:b2805b6888dc 1231 u_char *cip, *next; /* Pointer to current and next CIs */
robert_jw 0:b2805b6888dc 1232 int cilen, citype; /* Parsed len, type */
robert_jw 0:b2805b6888dc 1233 u_char cichar; /* Parsed char value */
robert_jw 0:b2805b6888dc 1234 u_short cishort; /* Parsed short value */
robert_jw 0:b2805b6888dc 1235 u32_t cilong; /* Parse long value */
robert_jw 0:b2805b6888dc 1236 int rc = CONFACK; /* Final packet return code */
robert_jw 0:b2805b6888dc 1237 int orc; /* Individual option return code */
robert_jw 0:b2805b6888dc 1238 u_char *p; /* Pointer to next char to parse */
robert_jw 0:b2805b6888dc 1239 u_char *rejp; /* Pointer to next char in reject frame */
robert_jw 0:b2805b6888dc 1240 u_char *nakp; /* Pointer to next char in Nak frame */
robert_jw 0:b2805b6888dc 1241 int l = *lenp; /* Length left */
robert_jw 0:b2805b6888dc 1242 #if TRACELCP > 0
robert_jw 0:b2805b6888dc 1243 char traceBuf[80];
robert_jw 0:b2805b6888dc 1244 size_t traceNdx = 0;
robert_jw 0:b2805b6888dc 1245 #endif
robert_jw 0:b2805b6888dc 1246
robert_jw 0:b2805b6888dc 1247 /*
robert_jw 0:b2805b6888dc 1248 * Reset all his options.
robert_jw 0:b2805b6888dc 1249 */
robert_jw 0:b2805b6888dc 1250 BZERO(ho, sizeof(*ho));
robert_jw 0:b2805b6888dc 1251
robert_jw 0:b2805b6888dc 1252 /*
robert_jw 0:b2805b6888dc 1253 * Process all his options.
robert_jw 0:b2805b6888dc 1254 */
robert_jw 0:b2805b6888dc 1255 next = inp;
robert_jw 0:b2805b6888dc 1256 nakp = nak_buffer;
robert_jw 0:b2805b6888dc 1257 rejp = inp;
robert_jw 0:b2805b6888dc 1258 while (l) {
robert_jw 0:b2805b6888dc 1259 orc = CONFACK; /* Assume success */
robert_jw 0:b2805b6888dc 1260 cip = p = next; /* Remember begining of CI */
robert_jw 0:b2805b6888dc 1261 if (l < 2 || /* Not enough data for CI header or */
robert_jw 0:b2805b6888dc 1262 p[1] < 2 || /* CI length too small or */
robert_jw 0:b2805b6888dc 1263 p[1] > l) { /* CI length too big? */
robert_jw 0:b2805b6888dc 1264 LCPDEBUG(LOG_WARNING, ("lcp_reqci: bad CI length!\n"));
robert_jw 0:b2805b6888dc 1265 orc = CONFREJ; /* Reject bad CI */
robert_jw 0:b2805b6888dc 1266 cilen = l; /* Reject till end of packet */
robert_jw 0:b2805b6888dc 1267 l = 0; /* Don't loop again */
robert_jw 0:b2805b6888dc 1268 citype = 0;
robert_jw 0:b2805b6888dc 1269 goto endswitch;
robert_jw 0:b2805b6888dc 1270 }
robert_jw 0:b2805b6888dc 1271 GETCHAR(citype, p); /* Parse CI type */
robert_jw 0:b2805b6888dc 1272 GETCHAR(cilen, p); /* Parse CI length */
robert_jw 0:b2805b6888dc 1273 l -= cilen; /* Adjust remaining length */
robert_jw 0:b2805b6888dc 1274 next += cilen; /* Step to next CI */
robert_jw 0:b2805b6888dc 1275
robert_jw 0:b2805b6888dc 1276 switch (citype) { /* Check CI type */
robert_jw 0:b2805b6888dc 1277 case CI_MRU:
robert_jw 0:b2805b6888dc 1278 if (!ao->neg_mru) { /* Allow option? */
robert_jw 0:b2805b6888dc 1279 LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - not allowed\n"));
robert_jw 0:b2805b6888dc 1280 orc = CONFREJ; /* Reject CI */
robert_jw 0:b2805b6888dc 1281 break;
robert_jw 0:b2805b6888dc 1282 } else if (cilen != CILEN_SHORT) { /* Check CI length */
robert_jw 0:b2805b6888dc 1283 LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - bad length\n"));
robert_jw 0:b2805b6888dc 1284 orc = CONFREJ; /* Reject CI */
robert_jw 0:b2805b6888dc 1285 break;
robert_jw 0:b2805b6888dc 1286 }
robert_jw 0:b2805b6888dc 1287 GETSHORT(cishort, p); /* Parse MRU */
robert_jw 0:b2805b6888dc 1288
robert_jw 0:b2805b6888dc 1289 /*
robert_jw 0:b2805b6888dc 1290 * He must be able to receive at least our minimum.
robert_jw 0:b2805b6888dc 1291 * No need to check a maximum. If he sends a large number,
robert_jw 0:b2805b6888dc 1292 * we'll just ignore it.
robert_jw 0:b2805b6888dc 1293 */
robert_jw 0:b2805b6888dc 1294 if (cishort < PPP_MINMRU) {
robert_jw 0:b2805b6888dc 1295 LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak - MRU too small\n"));
robert_jw 0:b2805b6888dc 1296 orc = CONFNAK; /* Nak CI */
robert_jw 0:b2805b6888dc 1297 PUTCHAR(CI_MRU, nakp);
robert_jw 0:b2805b6888dc 1298 PUTCHAR(CILEN_SHORT, nakp);
robert_jw 0:b2805b6888dc 1299 PUTSHORT(PPP_MINMRU, nakp); /* Give him a hint */
robert_jw 0:b2805b6888dc 1300 break;
robert_jw 0:b2805b6888dc 1301 }
robert_jw 0:b2805b6888dc 1302 ho->neg_mru = 1; /* Remember he sent MRU */
robert_jw 0:b2805b6888dc 1303 ho->mru = cishort; /* And remember value */
robert_jw 0:b2805b6888dc 1304 #if TRACELCP > 0
robert_jw 0:b2805b6888dc 1305 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MRU %d", cishort);
robert_jw 0:b2805b6888dc 1306 traceNdx = strlen(traceBuf);
robert_jw 0:b2805b6888dc 1307 #endif
robert_jw 0:b2805b6888dc 1308 break;
robert_jw 0:b2805b6888dc 1309
robert_jw 0:b2805b6888dc 1310 case CI_ASYNCMAP:
robert_jw 0:b2805b6888dc 1311 if (!ao->neg_asyncmap) {
robert_jw 0:b2805b6888dc 1312 LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP not allowed\n"));
robert_jw 0:b2805b6888dc 1313 orc = CONFREJ;
robert_jw 0:b2805b6888dc 1314 break;
robert_jw 0:b2805b6888dc 1315 } else if (cilen != CILEN_LONG) {
robert_jw 0:b2805b6888dc 1316 LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP bad length\n"));
robert_jw 0:b2805b6888dc 1317 orc = CONFREJ;
robert_jw 0:b2805b6888dc 1318 break;
robert_jw 0:b2805b6888dc 1319 }
robert_jw 0:b2805b6888dc 1320 GETLONG(cilong, p);
robert_jw 0:b2805b6888dc 1321
robert_jw 0:b2805b6888dc 1322 /*
robert_jw 0:b2805b6888dc 1323 * Asyncmap must have set at least the bits
robert_jw 0:b2805b6888dc 1324 * which are set in lcp_allowoptions[unit].asyncmap.
robert_jw 0:b2805b6888dc 1325 */
robert_jw 0:b2805b6888dc 1326 if ((ao->asyncmap & ~cilong) != 0) {
robert_jw 0:b2805b6888dc 1327 LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak ASYNCMAP %lX missing %lX\n",
robert_jw 0:b2805b6888dc 1328 cilong, ao->asyncmap));
robert_jw 0:b2805b6888dc 1329 orc = CONFNAK;
robert_jw 0:b2805b6888dc 1330 PUTCHAR(CI_ASYNCMAP, nakp);
robert_jw 0:b2805b6888dc 1331 PUTCHAR(CILEN_LONG, nakp);
robert_jw 0:b2805b6888dc 1332 PUTLONG(ao->asyncmap | cilong, nakp);
robert_jw 0:b2805b6888dc 1333 break;
robert_jw 0:b2805b6888dc 1334 }
robert_jw 0:b2805b6888dc 1335 ho->neg_asyncmap = 1;
robert_jw 0:b2805b6888dc 1336 ho->asyncmap = cilong;
robert_jw 0:b2805b6888dc 1337 #if TRACELCP > 0
robert_jw 0:b2805b6888dc 1338 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ASYNCMAP=%lX", cilong);
robert_jw 0:b2805b6888dc 1339 traceNdx = strlen(traceBuf);
robert_jw 0:b2805b6888dc 1340 #endif
robert_jw 0:b2805b6888dc 1341 break;
robert_jw 0:b2805b6888dc 1342
robert_jw 0:b2805b6888dc 1343 case CI_AUTHTYPE:
robert_jw 0:b2805b6888dc 1344 if (cilen < CILEN_SHORT) {
robert_jw 0:b2805b6888dc 1345 LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE missing arg\n"));
robert_jw 0:b2805b6888dc 1346 orc = CONFREJ;
robert_jw 0:b2805b6888dc 1347 break;
robert_jw 0:b2805b6888dc 1348 } else if (!(ao->neg_upap || ao->neg_chap)) {
robert_jw 0:b2805b6888dc 1349 /*
robert_jw 0:b2805b6888dc 1350 * Reject the option if we're not willing to authenticate.
robert_jw 0:b2805b6888dc 1351 */
robert_jw 0:b2805b6888dc 1352 LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE not allowed\n"));
robert_jw 0:b2805b6888dc 1353 orc = CONFREJ;
robert_jw 0:b2805b6888dc 1354 break;
robert_jw 0:b2805b6888dc 1355 }
robert_jw 0:b2805b6888dc 1356 GETSHORT(cishort, p);
robert_jw 0:b2805b6888dc 1357
robert_jw 0:b2805b6888dc 1358 /*
robert_jw 0:b2805b6888dc 1359 * Authtype must be UPAP or CHAP.
robert_jw 0:b2805b6888dc 1360 *
robert_jw 0:b2805b6888dc 1361 * Note: if both ao->neg_upap and ao->neg_chap are set,
robert_jw 0:b2805b6888dc 1362 * and the peer sends a Configure-Request with two
robert_jw 0:b2805b6888dc 1363 * authenticate-protocol requests, one for CHAP and one
robert_jw 0:b2805b6888dc 1364 * for UPAP, then we will reject the second request.
robert_jw 0:b2805b6888dc 1365 * Whether we end up doing CHAP or UPAP depends then on
robert_jw 0:b2805b6888dc 1366 * the ordering of the CIs in the peer's Configure-Request.
robert_jw 0:b2805b6888dc 1367 */
robert_jw 0:b2805b6888dc 1368
robert_jw 0:b2805b6888dc 1369 if (cishort == PPP_PAP) {
robert_jw 0:b2805b6888dc 1370 if (ho->neg_chap) { /* we've already accepted CHAP */
robert_jw 0:b2805b6888dc 1371 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP already accepted\n"));
robert_jw 0:b2805b6888dc 1372 orc = CONFREJ;
robert_jw 0:b2805b6888dc 1373 break;
robert_jw 0:b2805b6888dc 1374 } else if (cilen != CILEN_SHORT) {
robert_jw 0:b2805b6888dc 1375 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP bad len\n"));
robert_jw 0:b2805b6888dc 1376 orc = CONFREJ;
robert_jw 0:b2805b6888dc 1377 break;
robert_jw 0:b2805b6888dc 1378 }
robert_jw 0:b2805b6888dc 1379 if (!ao->neg_upap) { /* we don't want to do PAP */
robert_jw 0:b2805b6888dc 1380 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE PAP not allowed\n"));
robert_jw 0:b2805b6888dc 1381 orc = CONFNAK; /* NAK it and suggest CHAP */
robert_jw 0:b2805b6888dc 1382 PUTCHAR(CI_AUTHTYPE, nakp);
robert_jw 0:b2805b6888dc 1383 PUTCHAR(CILEN_CHAP, nakp);
robert_jw 0:b2805b6888dc 1384 PUTSHORT(PPP_CHAP, nakp);
robert_jw 0:b2805b6888dc 1385 PUTCHAR(ao->chap_mdtype, nakp);
robert_jw 0:b2805b6888dc 1386 break;
robert_jw 0:b2805b6888dc 1387 }
robert_jw 0:b2805b6888dc 1388 ho->neg_upap = 1;
robert_jw 0:b2805b6888dc 1389 #if TRACELCP > 0
robert_jw 0:b2805b6888dc 1390 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PAP (%X)", cishort);
robert_jw 0:b2805b6888dc 1391 traceNdx = strlen(traceBuf);
robert_jw 0:b2805b6888dc 1392 #endif
robert_jw 0:b2805b6888dc 1393 break;
robert_jw 0:b2805b6888dc 1394 }
robert_jw 0:b2805b6888dc 1395 if (cishort == PPP_CHAP) {
robert_jw 0:b2805b6888dc 1396 if (ho->neg_upap) { /* we've already accepted PAP */
robert_jw 0:b2805b6888dc 1397 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP accepted PAP\n"));
robert_jw 0:b2805b6888dc 1398 orc = CONFREJ;
robert_jw 0:b2805b6888dc 1399 break;
robert_jw 0:b2805b6888dc 1400 } else if (cilen != CILEN_CHAP) {
robert_jw 0:b2805b6888dc 1401 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP bad len\n"));
robert_jw 0:b2805b6888dc 1402 orc = CONFREJ;
robert_jw 0:b2805b6888dc 1403 break;
robert_jw 0:b2805b6888dc 1404 }
robert_jw 0:b2805b6888dc 1405 if (!ao->neg_chap) { /* we don't want to do CHAP */
robert_jw 0:b2805b6888dc 1406 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP not allowed\n"));
robert_jw 0:b2805b6888dc 1407 orc = CONFNAK; /* NAK it and suggest PAP */
robert_jw 0:b2805b6888dc 1408 PUTCHAR(CI_AUTHTYPE, nakp);
robert_jw 0:b2805b6888dc 1409 PUTCHAR(CILEN_SHORT, nakp);
robert_jw 0:b2805b6888dc 1410 PUTSHORT(PPP_PAP, nakp);
robert_jw 0:b2805b6888dc 1411 break;
robert_jw 0:b2805b6888dc 1412 }
robert_jw 0:b2805b6888dc 1413 GETCHAR(cichar, p); /* get digest type*/
robert_jw 0:b2805b6888dc 1414 if (cichar != CHAP_DIGEST_MD5
robert_jw 0:b2805b6888dc 1415 #if MSCHAP_SUPPORT
robert_jw 0:b2805b6888dc 1416 && cichar != CHAP_MICROSOFT
robert_jw 0:b2805b6888dc 1417 #endif
robert_jw 0:b2805b6888dc 1418 ) {
robert_jw 0:b2805b6888dc 1419 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP digest=%d\n", (int)cichar));
robert_jw 0:b2805b6888dc 1420 orc = CONFNAK;
robert_jw 0:b2805b6888dc 1421 PUTCHAR(CI_AUTHTYPE, nakp);
robert_jw 0:b2805b6888dc 1422 PUTCHAR(CILEN_CHAP, nakp);
robert_jw 0:b2805b6888dc 1423 PUTSHORT(PPP_CHAP, nakp);
robert_jw 0:b2805b6888dc 1424 PUTCHAR(ao->chap_mdtype, nakp);
robert_jw 0:b2805b6888dc 1425 break;
robert_jw 0:b2805b6888dc 1426 }
robert_jw 0:b2805b6888dc 1427 #if TRACELCP > 0
robert_jw 0:b2805b6888dc 1428 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CHAP %X,%d", cishort, (int)cichar);
robert_jw 0:b2805b6888dc 1429 traceNdx = strlen(traceBuf);
robert_jw 0:b2805b6888dc 1430 #endif
robert_jw 0:b2805b6888dc 1431 ho->chap_mdtype = cichar; /* save md type */
robert_jw 0:b2805b6888dc 1432 ho->neg_chap = 1;
robert_jw 0:b2805b6888dc 1433 break;
robert_jw 0:b2805b6888dc 1434 }
robert_jw 0:b2805b6888dc 1435
robert_jw 0:b2805b6888dc 1436 /*
robert_jw 0:b2805b6888dc 1437 * We don't recognize the protocol they're asking for.
robert_jw 0:b2805b6888dc 1438 * Nak it with something we're willing to do.
robert_jw 0:b2805b6888dc 1439 * (At this point we know ao->neg_upap || ao->neg_chap.)
robert_jw 0:b2805b6888dc 1440 */
robert_jw 0:b2805b6888dc 1441 orc = CONFNAK;
robert_jw 0:b2805b6888dc 1442 PUTCHAR(CI_AUTHTYPE, nakp);
robert_jw 0:b2805b6888dc 1443 if (ao->neg_chap) {
robert_jw 0:b2805b6888dc 1444 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req CHAP\n", cishort));
robert_jw 0:b2805b6888dc 1445 PUTCHAR(CILEN_CHAP, nakp);
robert_jw 0:b2805b6888dc 1446 PUTSHORT(PPP_CHAP, nakp);
robert_jw 0:b2805b6888dc 1447 PUTCHAR(ao->chap_mdtype, nakp);
robert_jw 0:b2805b6888dc 1448 } else {
robert_jw 0:b2805b6888dc 1449 LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req PAP\n", cishort));
robert_jw 0:b2805b6888dc 1450 PUTCHAR(CILEN_SHORT, nakp);
robert_jw 0:b2805b6888dc 1451 PUTSHORT(PPP_PAP, nakp);
robert_jw 0:b2805b6888dc 1452 }
robert_jw 0:b2805b6888dc 1453 break;
robert_jw 0:b2805b6888dc 1454
robert_jw 0:b2805b6888dc 1455 case CI_QUALITY:
robert_jw 0:b2805b6888dc 1456 GETSHORT(cishort, p);
robert_jw 0:b2805b6888dc 1457 GETLONG(cilong, p);
robert_jw 0:b2805b6888dc 1458 #if TRACELCP > 0
robert_jw 0:b2805b6888dc 1459 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " QUALITY (%x %x)", cishort, (unsigned int) cilong);
robert_jw 0:b2805b6888dc 1460 traceNdx = strlen(traceBuf);
robert_jw 0:b2805b6888dc 1461 #endif
robert_jw 0:b2805b6888dc 1462
robert_jw 0:b2805b6888dc 1463 if (!ao->neg_lqr ||
robert_jw 0:b2805b6888dc 1464 cilen != CILEN_LQR) {
robert_jw 0:b2805b6888dc 1465 orc = CONFREJ;
robert_jw 0:b2805b6888dc 1466 break;
robert_jw 0:b2805b6888dc 1467 }
robert_jw 0:b2805b6888dc 1468
robert_jw 0:b2805b6888dc 1469 /*
robert_jw 0:b2805b6888dc 1470 * Check the protocol and the reporting period.
robert_jw 0:b2805b6888dc 1471 * XXX When should we Nak this, and what with?
robert_jw 0:b2805b6888dc 1472 */
robert_jw 0:b2805b6888dc 1473 if (cishort != PPP_LQR) {
robert_jw 0:b2805b6888dc 1474 orc = CONFNAK;
robert_jw 0:b2805b6888dc 1475 PUTCHAR(CI_QUALITY, nakp);
robert_jw 0:b2805b6888dc 1476 PUTCHAR(CILEN_LQR, nakp);
robert_jw 0:b2805b6888dc 1477 PUTSHORT(PPP_LQR, nakp);
robert_jw 0:b2805b6888dc 1478 PUTLONG(ao->lqr_period, nakp);
robert_jw 0:b2805b6888dc 1479 break;
robert_jw 0:b2805b6888dc 1480 }
robert_jw 0:b2805b6888dc 1481 break;
robert_jw 0:b2805b6888dc 1482
robert_jw 0:b2805b6888dc 1483 case CI_MAGICNUMBER:
robert_jw 0:b2805b6888dc 1484 if (!(ao->neg_magicnumber || go->neg_magicnumber) ||
robert_jw 0:b2805b6888dc 1485 cilen != CILEN_LONG) {
robert_jw 0:b2805b6888dc 1486 orc = CONFREJ;
robert_jw 0:b2805b6888dc 1487 break;
robert_jw 0:b2805b6888dc 1488 }
robert_jw 0:b2805b6888dc 1489 GETLONG(cilong, p);
robert_jw 0:b2805b6888dc 1490 #if TRACELCP > 0
robert_jw 0:b2805b6888dc 1491 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MAGICNUMBER (%lX)", cilong);
robert_jw 0:b2805b6888dc 1492 traceNdx = strlen(traceBuf);
robert_jw 0:b2805b6888dc 1493 #endif
robert_jw 0:b2805b6888dc 1494
robert_jw 0:b2805b6888dc 1495 /*
robert_jw 0:b2805b6888dc 1496 * He must have a different magic number.
robert_jw 0:b2805b6888dc 1497 */
robert_jw 0:b2805b6888dc 1498 if (go->neg_magicnumber &&
robert_jw 0:b2805b6888dc 1499 cilong == go->magicnumber) {
robert_jw 0:b2805b6888dc 1500 cilong = magic(); /* Don't put magic() inside macro! */
robert_jw 0:b2805b6888dc 1501 orc = CONFNAK;
robert_jw 0:b2805b6888dc 1502 PUTCHAR(CI_MAGICNUMBER, nakp);
robert_jw 0:b2805b6888dc 1503 PUTCHAR(CILEN_LONG, nakp);
robert_jw 0:b2805b6888dc 1504 PUTLONG(cilong, nakp);
robert_jw 0:b2805b6888dc 1505 break;
robert_jw 0:b2805b6888dc 1506 }
robert_jw 0:b2805b6888dc 1507 ho->neg_magicnumber = 1;
robert_jw 0:b2805b6888dc 1508 ho->magicnumber = cilong;
robert_jw 0:b2805b6888dc 1509 break;
robert_jw 0:b2805b6888dc 1510
robert_jw 0:b2805b6888dc 1511
robert_jw 0:b2805b6888dc 1512 case CI_PCOMPRESSION:
robert_jw 0:b2805b6888dc 1513 #if TRACELCP > 0
robert_jw 0:b2805b6888dc 1514 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PCOMPRESSION");
robert_jw 0:b2805b6888dc 1515 traceNdx = strlen(traceBuf);
robert_jw 0:b2805b6888dc 1516 #endif
robert_jw 0:b2805b6888dc 1517 if (!ao->neg_pcompression ||
robert_jw 0:b2805b6888dc 1518 cilen != CILEN_VOID) {
robert_jw 0:b2805b6888dc 1519 orc = CONFREJ;
robert_jw 0:b2805b6888dc 1520 break;
robert_jw 0:b2805b6888dc 1521 }
robert_jw 0:b2805b6888dc 1522 ho->neg_pcompression = 1;
robert_jw 0:b2805b6888dc 1523 break;
robert_jw 0:b2805b6888dc 1524
robert_jw 0:b2805b6888dc 1525 case CI_ACCOMPRESSION:
robert_jw 0:b2805b6888dc 1526 #if TRACELCP > 0
robert_jw 0:b2805b6888dc 1527 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ACCOMPRESSION");
robert_jw 0:b2805b6888dc 1528 traceNdx = strlen(traceBuf);
robert_jw 0:b2805b6888dc 1529 #endif
robert_jw 0:b2805b6888dc 1530 if (!ao->neg_accompression ||
robert_jw 0:b2805b6888dc 1531 cilen != CILEN_VOID) {
robert_jw 0:b2805b6888dc 1532 orc = CONFREJ;
robert_jw 0:b2805b6888dc 1533 break;
robert_jw 0:b2805b6888dc 1534 }
robert_jw 0:b2805b6888dc 1535 ho->neg_accompression = 1;
robert_jw 0:b2805b6888dc 1536 break;
robert_jw 0:b2805b6888dc 1537
robert_jw 0:b2805b6888dc 1538 case CI_MRRU:
robert_jw 0:b2805b6888dc 1539 #if TRACELCP > 0
robert_jw 0:b2805b6888dc 1540 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_MRRU");
robert_jw 0:b2805b6888dc 1541 traceNdx = strlen(traceBuf);
robert_jw 0:b2805b6888dc 1542 #endif
robert_jw 0:b2805b6888dc 1543 orc = CONFREJ;
robert_jw 0:b2805b6888dc 1544 break;
robert_jw 0:b2805b6888dc 1545
robert_jw 0:b2805b6888dc 1546 case CI_SSNHF:
robert_jw 0:b2805b6888dc 1547 #if TRACELCP > 0
robert_jw 0:b2805b6888dc 1548 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_SSNHF");
robert_jw 0:b2805b6888dc 1549 traceNdx = strlen(traceBuf);
robert_jw 0:b2805b6888dc 1550 #endif
robert_jw 0:b2805b6888dc 1551 orc = CONFREJ;
robert_jw 0:b2805b6888dc 1552 break;
robert_jw 0:b2805b6888dc 1553
robert_jw 0:b2805b6888dc 1554 case CI_EPDISC:
robert_jw 0:b2805b6888dc 1555 #if TRACELCP > 0
robert_jw 0:b2805b6888dc 1556 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_EPDISC");
robert_jw 0:b2805b6888dc 1557 traceNdx = strlen(traceBuf);
robert_jw 0:b2805b6888dc 1558 #endif
robert_jw 0:b2805b6888dc 1559 orc = CONFREJ;
robert_jw 0:b2805b6888dc 1560 break;
robert_jw 0:b2805b6888dc 1561
robert_jw 0:b2805b6888dc 1562 default:
robert_jw 0:b2805b6888dc 1563 #if TRACELCP
robert_jw 0:b2805b6888dc 1564 snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " unknown %d", citype);
robert_jw 0:b2805b6888dc 1565 traceNdx = strlen(traceBuf);
robert_jw 0:b2805b6888dc 1566 #endif
robert_jw 0:b2805b6888dc 1567 orc = CONFREJ;
robert_jw 0:b2805b6888dc 1568 break;
robert_jw 0:b2805b6888dc 1569 }
robert_jw 0:b2805b6888dc 1570
robert_jw 0:b2805b6888dc 1571 endswitch:
robert_jw 0:b2805b6888dc 1572 #if TRACELCP
robert_jw 0:b2805b6888dc 1573 if (traceNdx >= 80 - 32) {
robert_jw 0:b2805b6888dc 1574 LCPDEBUG(LOG_INFO, ("lcp_reqci: rcvd%s\n", traceBuf));
robert_jw 0:b2805b6888dc 1575 traceNdx = 0;
robert_jw 0:b2805b6888dc 1576 }
robert_jw 0:b2805b6888dc 1577 #endif
robert_jw 0:b2805b6888dc 1578 if (orc == CONFACK && /* Good CI */
robert_jw 0:b2805b6888dc 1579 rc != CONFACK) { /* but prior CI wasnt? */
robert_jw 0:b2805b6888dc 1580 continue; /* Don't send this one */
robert_jw 0:b2805b6888dc 1581 }
robert_jw 0:b2805b6888dc 1582
robert_jw 0:b2805b6888dc 1583 if (orc == CONFNAK) { /* Nak this CI? */
robert_jw 0:b2805b6888dc 1584 if (reject_if_disagree /* Getting fed up with sending NAKs? */
robert_jw 0:b2805b6888dc 1585 && citype != CI_MAGICNUMBER) {
robert_jw 0:b2805b6888dc 1586 orc = CONFREJ; /* Get tough if so */
robert_jw 0:b2805b6888dc 1587 } else {
robert_jw 0:b2805b6888dc 1588 if (rc == CONFREJ) { /* Rejecting prior CI? */
robert_jw 0:b2805b6888dc 1589 continue; /* Don't send this one */
robert_jw 0:b2805b6888dc 1590 }
robert_jw 0:b2805b6888dc 1591 rc = CONFNAK;
robert_jw 0:b2805b6888dc 1592 }
robert_jw 0:b2805b6888dc 1593 }
robert_jw 0:b2805b6888dc 1594 if (orc == CONFREJ) { /* Reject this CI */
robert_jw 0:b2805b6888dc 1595 rc = CONFREJ;
robert_jw 0:b2805b6888dc 1596 if (cip != rejp) { /* Need to move rejected CI? */
robert_jw 0:b2805b6888dc 1597 BCOPY(cip, rejp, cilen); /* Move it */
robert_jw 0:b2805b6888dc 1598 }
robert_jw 0:b2805b6888dc 1599 INCPTR(cilen, rejp); /* Update output pointer */
robert_jw 0:b2805b6888dc 1600 }
robert_jw 0:b2805b6888dc 1601 }
robert_jw 0:b2805b6888dc 1602
robert_jw 0:b2805b6888dc 1603 /*
robert_jw 0:b2805b6888dc 1604 * If we wanted to send additional NAKs (for unsent CIs), the
robert_jw 0:b2805b6888dc 1605 * code would go here. The extra NAKs would go at *nakp.
robert_jw 0:b2805b6888dc 1606 * At present there are no cases where we want to ask the
robert_jw 0:b2805b6888dc 1607 * peer to negotiate an option.
robert_jw 0:b2805b6888dc 1608 */
robert_jw 0:b2805b6888dc 1609
robert_jw 0:b2805b6888dc 1610 switch (rc) {
robert_jw 0:b2805b6888dc 1611 case CONFACK:
robert_jw 0:b2805b6888dc 1612 *lenp = (int)(next - inp);
robert_jw 0:b2805b6888dc 1613 break;
robert_jw 0:b2805b6888dc 1614 case CONFNAK:
robert_jw 0:b2805b6888dc 1615 /*
robert_jw 0:b2805b6888dc 1616 * Copy the Nak'd options from the nak_buffer to the caller's buffer.
robert_jw 0:b2805b6888dc 1617 */
robert_jw 0:b2805b6888dc 1618 *lenp = (int)(nakp - nak_buffer);
robert_jw 0:b2805b6888dc 1619 BCOPY(nak_buffer, inp, *lenp);
robert_jw 0:b2805b6888dc 1620 break;
robert_jw 0:b2805b6888dc 1621 case CONFREJ:
robert_jw 0:b2805b6888dc 1622 *lenp = (int)(rejp - inp);
robert_jw 0:b2805b6888dc 1623 break;
robert_jw 0:b2805b6888dc 1624 }
robert_jw 0:b2805b6888dc 1625
robert_jw 0:b2805b6888dc 1626 #if TRACELCP > 0
robert_jw 0:b2805b6888dc 1627 if (traceNdx > 0) {
robert_jw 0:b2805b6888dc 1628 LCPDEBUG(LOG_INFO, ("lcp_reqci: %s\n", traceBuf));
robert_jw 0:b2805b6888dc 1629 }
robert_jw 0:b2805b6888dc 1630 #endif
robert_jw 0:b2805b6888dc 1631 LCPDEBUG(LOG_INFO, ("lcp_reqci: returning CONF%s.\n", CODENAME(rc)));
robert_jw 0:b2805b6888dc 1632 return (rc); /* Return final code */
robert_jw 0:b2805b6888dc 1633 }
robert_jw 0:b2805b6888dc 1634
robert_jw 0:b2805b6888dc 1635
robert_jw 0:b2805b6888dc 1636 /*
robert_jw 0:b2805b6888dc 1637 * lcp_up - LCP has come UP.
robert_jw 0:b2805b6888dc 1638 */
robert_jw 0:b2805b6888dc 1639 static void
robert_jw 0:b2805b6888dc 1640 lcp_up(fsm *f)
robert_jw 0:b2805b6888dc 1641 {
robert_jw 0:b2805b6888dc 1642 lcp_options *wo = &lcp_wantoptions[f->unit];
robert_jw 0:b2805b6888dc 1643 lcp_options *ho = &lcp_hisoptions[f->unit];
robert_jw 0:b2805b6888dc 1644 lcp_options *go = &lcp_gotoptions[f->unit];
robert_jw 0:b2805b6888dc 1645 lcp_options *ao = &lcp_allowoptions[f->unit];
robert_jw 0:b2805b6888dc 1646
robert_jw 0:b2805b6888dc 1647 if (!go->neg_magicnumber) {
robert_jw 0:b2805b6888dc 1648 go->magicnumber = 0;
robert_jw 0:b2805b6888dc 1649 }
robert_jw 0:b2805b6888dc 1650 if (!ho->neg_magicnumber) {
robert_jw 0:b2805b6888dc 1651 ho->magicnumber = 0;
robert_jw 0:b2805b6888dc 1652 }
robert_jw 0:b2805b6888dc 1653
robert_jw 0:b2805b6888dc 1654 /*
robert_jw 0:b2805b6888dc 1655 * Set our MTU to the smaller of the MTU we wanted and
robert_jw 0:b2805b6888dc 1656 * the MRU our peer wanted. If we negotiated an MRU,
robert_jw 0:b2805b6888dc 1657 * set our MRU to the larger of value we wanted and
robert_jw 0:b2805b6888dc 1658 * the value we got in the negotiation.
robert_jw 0:b2805b6888dc 1659 */
robert_jw 0:b2805b6888dc 1660 ppp_send_config(f->unit, LWIP_MIN(ao->mru, (ho->neg_mru? ho->mru: PPP_MRU)),
robert_jw 0:b2805b6888dc 1661 (ho->neg_asyncmap? ho->asyncmap: 0xffffffffl),
robert_jw 0:b2805b6888dc 1662 ho->neg_pcompression, ho->neg_accompression);
robert_jw 0:b2805b6888dc 1663 /*
robert_jw 0:b2805b6888dc 1664 * If the asyncmap hasn't been negotiated, we really should
robert_jw 0:b2805b6888dc 1665 * set the receive asyncmap to ffffffff, but we set it to 0
robert_jw 0:b2805b6888dc 1666 * for backwards contemptibility.
robert_jw 0:b2805b6888dc 1667 */
robert_jw 0:b2805b6888dc 1668 ppp_recv_config(f->unit, (go->neg_mru? LWIP_MAX(wo->mru, go->mru): PPP_MRU),
robert_jw 0:b2805b6888dc 1669 (go->neg_asyncmap? go->asyncmap: 0x00000000),
robert_jw 0:b2805b6888dc 1670 go->neg_pcompression, go->neg_accompression);
robert_jw 0:b2805b6888dc 1671
robert_jw 0:b2805b6888dc 1672 if (ho->neg_mru) {
robert_jw 0:b2805b6888dc 1673 peer_mru[f->unit] = ho->mru;
robert_jw 0:b2805b6888dc 1674 }
robert_jw 0:b2805b6888dc 1675
robert_jw 0:b2805b6888dc 1676 lcp_echo_lowerup(f->unit); /* Enable echo messages */
robert_jw 0:b2805b6888dc 1677
robert_jw 0:b2805b6888dc 1678 link_established(f->unit); /* The link is up; authenticate now */
robert_jw 0:b2805b6888dc 1679 }
robert_jw 0:b2805b6888dc 1680
robert_jw 0:b2805b6888dc 1681
robert_jw 0:b2805b6888dc 1682 /*
robert_jw 0:b2805b6888dc 1683 * lcp_down - LCP has gone DOWN.
robert_jw 0:b2805b6888dc 1684 *
robert_jw 0:b2805b6888dc 1685 * Alert other protocols.
robert_jw 0:b2805b6888dc 1686 */
robert_jw 0:b2805b6888dc 1687 static void
robert_jw 0:b2805b6888dc 1688 lcp_down(fsm *f)
robert_jw 0:b2805b6888dc 1689 {
robert_jw 0:b2805b6888dc 1690 lcp_options *go = &lcp_gotoptions[f->unit];
robert_jw 0:b2805b6888dc 1691
robert_jw 0:b2805b6888dc 1692 lcp_echo_lowerdown(f->unit);
robert_jw 0:b2805b6888dc 1693
robert_jw 0:b2805b6888dc 1694 link_down(f->unit);
robert_jw 0:b2805b6888dc 1695
robert_jw 0:b2805b6888dc 1696 ppp_send_config(f->unit, PPP_MRU, 0xffffffffl, 0, 0);
robert_jw 0:b2805b6888dc 1697 ppp_recv_config(f->unit, PPP_MRU,
robert_jw 0:b2805b6888dc 1698 (go->neg_asyncmap? go->asyncmap: 0x00000000),
robert_jw 0:b2805b6888dc 1699 go->neg_pcompression, go->neg_accompression);
robert_jw 0:b2805b6888dc 1700 peer_mru[f->unit] = PPP_MRU;
robert_jw 0:b2805b6888dc 1701 }
robert_jw 0:b2805b6888dc 1702
robert_jw 0:b2805b6888dc 1703
robert_jw 0:b2805b6888dc 1704 /*
robert_jw 0:b2805b6888dc 1705 * lcp_starting - LCP needs the lower layer up.
robert_jw 0:b2805b6888dc 1706 */
robert_jw 0:b2805b6888dc 1707 static void
robert_jw 0:b2805b6888dc 1708 lcp_starting(fsm *f)
robert_jw 0:b2805b6888dc 1709 {
robert_jw 0:b2805b6888dc 1710 link_required(f->unit); /* lwip: currently does nothing */
robert_jw 0:b2805b6888dc 1711 }
robert_jw 0:b2805b6888dc 1712
robert_jw 0:b2805b6888dc 1713
robert_jw 0:b2805b6888dc 1714 /*
robert_jw 0:b2805b6888dc 1715 * lcp_finished - LCP has finished with the lower layer.
robert_jw 0:b2805b6888dc 1716 */
robert_jw 0:b2805b6888dc 1717 static void
robert_jw 0:b2805b6888dc 1718 lcp_finished(fsm *f)
robert_jw 0:b2805b6888dc 1719 {
robert_jw 0:b2805b6888dc 1720 link_terminated(f->unit); /* we are finished with the link */
robert_jw 0:b2805b6888dc 1721 }
robert_jw 0:b2805b6888dc 1722
robert_jw 0:b2805b6888dc 1723
robert_jw 0:b2805b6888dc 1724 #if PPP_ADDITIONAL_CALLBACKS
robert_jw 0:b2805b6888dc 1725 /*
robert_jw 0:b2805b6888dc 1726 * print_string - print a readable representation of a string using
robert_jw 0:b2805b6888dc 1727 * printer.
robert_jw 0:b2805b6888dc 1728 */
robert_jw 0:b2805b6888dc 1729 static void
robert_jw 0:b2805b6888dc 1730 print_string( char *p, int len, void (*printer) (void *, char *, ...), void *arg)
robert_jw 0:b2805b6888dc 1731 {
robert_jw 0:b2805b6888dc 1732 int c;
robert_jw 0:b2805b6888dc 1733
robert_jw 0:b2805b6888dc 1734 printer(arg, "\"");
robert_jw 0:b2805b6888dc 1735 for (; len > 0; --len) {
robert_jw 0:b2805b6888dc 1736 c = *p++;
robert_jw 0:b2805b6888dc 1737 if (' ' <= c && c <= '~') {
robert_jw 0:b2805b6888dc 1738 if (c == '\\' || c == '"') {
robert_jw 0:b2805b6888dc 1739 printer(arg, "\\");
robert_jw 0:b2805b6888dc 1740 }
robert_jw 0:b2805b6888dc 1741 printer(arg, "%c", c);
robert_jw 0:b2805b6888dc 1742 } else {
robert_jw 0:b2805b6888dc 1743 switch (c) {
robert_jw 0:b2805b6888dc 1744 case '\n':
robert_jw 0:b2805b6888dc 1745 printer(arg, "\\n");
robert_jw 0:b2805b6888dc 1746 break;
robert_jw 0:b2805b6888dc 1747 case '\r':
robert_jw 0:b2805b6888dc 1748 printer(arg, "\\r");
robert_jw 0:b2805b6888dc 1749 break;
robert_jw 0:b2805b6888dc 1750 case '\t':
robert_jw 0:b2805b6888dc 1751 printer(arg, "\\t");
robert_jw 0:b2805b6888dc 1752 break;
robert_jw 0:b2805b6888dc 1753 default:
robert_jw 0:b2805b6888dc 1754 printer(arg, "\\%.3o", c);
robert_jw 0:b2805b6888dc 1755 }
robert_jw 0:b2805b6888dc 1756 }
robert_jw 0:b2805b6888dc 1757 }
robert_jw 0:b2805b6888dc 1758 printer(arg, "\"");
robert_jw 0:b2805b6888dc 1759 }
robert_jw 0:b2805b6888dc 1760
robert_jw 0:b2805b6888dc 1761
robert_jw 0:b2805b6888dc 1762 /*
robert_jw 0:b2805b6888dc 1763 * lcp_printpkt - print the contents of an LCP packet.
robert_jw 0:b2805b6888dc 1764 */
robert_jw 0:b2805b6888dc 1765 static char *lcp_codenames[] = {
robert_jw 0:b2805b6888dc 1766 "ConfReq", "ConfAck", "ConfNak", "ConfRej",
robert_jw 0:b2805b6888dc 1767 "TermReq", "TermAck", "CodeRej", "ProtRej",
robert_jw 0:b2805b6888dc 1768 "EchoReq", "EchoRep", "DiscReq"
robert_jw 0:b2805b6888dc 1769 };
robert_jw 0:b2805b6888dc 1770
robert_jw 0:b2805b6888dc 1771 static int
robert_jw 0:b2805b6888dc 1772 lcp_printpkt( u_char *p, int plen, void (*printer) (void *, char *, ...), void *arg)
robert_jw 0:b2805b6888dc 1773 {
robert_jw 0:b2805b6888dc 1774 int code, id, len, olen;
robert_jw 0:b2805b6888dc 1775 u_char *pstart, *optend;
robert_jw 0:b2805b6888dc 1776 u_short cishort;
robert_jw 0:b2805b6888dc 1777 u32_t cilong;
robert_jw 0:b2805b6888dc 1778
robert_jw 0:b2805b6888dc 1779 if (plen < HEADERLEN) {
robert_jw 0:b2805b6888dc 1780 return 0;
robert_jw 0:b2805b6888dc 1781 }
robert_jw 0:b2805b6888dc 1782 pstart = p;
robert_jw 0:b2805b6888dc 1783 GETCHAR(code, p);
robert_jw 0:b2805b6888dc 1784 GETCHAR(id, p);
robert_jw 0:b2805b6888dc 1785 GETSHORT(len, p);
robert_jw 0:b2805b6888dc 1786 if (len < HEADERLEN || len > plen) {
robert_jw 0:b2805b6888dc 1787 return 0;
robert_jw 0:b2805b6888dc 1788 }
robert_jw 0:b2805b6888dc 1789
robert_jw 0:b2805b6888dc 1790 if (code >= 1 && code <= sizeof(lcp_codenames) / sizeof(char *)) {
robert_jw 0:b2805b6888dc 1791 printer(arg, " %s", lcp_codenames[code-1]);
robert_jw 0:b2805b6888dc 1792 } else {
robert_jw 0:b2805b6888dc 1793 printer(arg, " code=0x%x", code);
robert_jw 0:b2805b6888dc 1794 }
robert_jw 0:b2805b6888dc 1795 printer(arg, " id=0x%x", id);
robert_jw 0:b2805b6888dc 1796 len -= HEADERLEN;
robert_jw 0:b2805b6888dc 1797 switch (code) {
robert_jw 0:b2805b6888dc 1798 case CONFREQ:
robert_jw 0:b2805b6888dc 1799 case CONFACK:
robert_jw 0:b2805b6888dc 1800 case CONFNAK:
robert_jw 0:b2805b6888dc 1801 case CONFREJ:
robert_jw 0:b2805b6888dc 1802 /* print option list */
robert_jw 0:b2805b6888dc 1803 while (len >= 2) {
robert_jw 0:b2805b6888dc 1804 GETCHAR(code, p);
robert_jw 0:b2805b6888dc 1805 GETCHAR(olen, p);
robert_jw 0:b2805b6888dc 1806 p -= 2;
robert_jw 0:b2805b6888dc 1807 if (olen < 2 || olen > len) {
robert_jw 0:b2805b6888dc 1808 break;
robert_jw 0:b2805b6888dc 1809 }
robert_jw 0:b2805b6888dc 1810 printer(arg, " <");
robert_jw 0:b2805b6888dc 1811 len -= olen;
robert_jw 0:b2805b6888dc 1812 optend = p + olen;
robert_jw 0:b2805b6888dc 1813 switch (code) {
robert_jw 0:b2805b6888dc 1814 case CI_MRU:
robert_jw 0:b2805b6888dc 1815 if (olen == CILEN_SHORT) {
robert_jw 0:b2805b6888dc 1816 p += 2;
robert_jw 0:b2805b6888dc 1817 GETSHORT(cishort, p);
robert_jw 0:b2805b6888dc 1818 printer(arg, "mru %d", cishort);
robert_jw 0:b2805b6888dc 1819 }
robert_jw 0:b2805b6888dc 1820 break;
robert_jw 0:b2805b6888dc 1821 case CI_ASYNCMAP:
robert_jw 0:b2805b6888dc 1822 if (olen == CILEN_LONG) {
robert_jw 0:b2805b6888dc 1823 p += 2;
robert_jw 0:b2805b6888dc 1824 GETLONG(cilong, p);
robert_jw 0:b2805b6888dc 1825 printer(arg, "asyncmap 0x%lx", cilong);
robert_jw 0:b2805b6888dc 1826 }
robert_jw 0:b2805b6888dc 1827 break;
robert_jw 0:b2805b6888dc 1828 case CI_AUTHTYPE:
robert_jw 0:b2805b6888dc 1829 if (olen >= CILEN_SHORT) {
robert_jw 0:b2805b6888dc 1830 p += 2;
robert_jw 0:b2805b6888dc 1831 printer(arg, "auth ");
robert_jw 0:b2805b6888dc 1832 GETSHORT(cishort, p);
robert_jw 0:b2805b6888dc 1833 switch (cishort) {
robert_jw 0:b2805b6888dc 1834 case PPP_PAP:
robert_jw 0:b2805b6888dc 1835 printer(arg, "pap");
robert_jw 0:b2805b6888dc 1836 break;
robert_jw 0:b2805b6888dc 1837 case PPP_CHAP:
robert_jw 0:b2805b6888dc 1838 printer(arg, "chap");
robert_jw 0:b2805b6888dc 1839 break;
robert_jw 0:b2805b6888dc 1840 default:
robert_jw 0:b2805b6888dc 1841 printer(arg, "0x%x", cishort);
robert_jw 0:b2805b6888dc 1842 }
robert_jw 0:b2805b6888dc 1843 }
robert_jw 0:b2805b6888dc 1844 break;
robert_jw 0:b2805b6888dc 1845 case CI_QUALITY:
robert_jw 0:b2805b6888dc 1846 if (olen >= CILEN_SHORT) {
robert_jw 0:b2805b6888dc 1847 p += 2;
robert_jw 0:b2805b6888dc 1848 printer(arg, "quality ");
robert_jw 0:b2805b6888dc 1849 GETSHORT(cishort, p);
robert_jw 0:b2805b6888dc 1850 switch (cishort) {
robert_jw 0:b2805b6888dc 1851 case PPP_LQR:
robert_jw 0:b2805b6888dc 1852 printer(arg, "lqr");
robert_jw 0:b2805b6888dc 1853 break;
robert_jw 0:b2805b6888dc 1854 default:
robert_jw 0:b2805b6888dc 1855 printer(arg, "0x%x", cishort);
robert_jw 0:b2805b6888dc 1856 }
robert_jw 0:b2805b6888dc 1857 }
robert_jw 0:b2805b6888dc 1858 break;
robert_jw 0:b2805b6888dc 1859 case CI_CALLBACK:
robert_jw 0:b2805b6888dc 1860 if (olen >= CILEN_CHAR) {
robert_jw 0:b2805b6888dc 1861 p += 2;
robert_jw 0:b2805b6888dc 1862 printer(arg, "callback ");
robert_jw 0:b2805b6888dc 1863 GETSHORT(cishort, p);
robert_jw 0:b2805b6888dc 1864 switch (cishort) {
robert_jw 0:b2805b6888dc 1865 case CBCP_OPT:
robert_jw 0:b2805b6888dc 1866 printer(arg, "CBCP");
robert_jw 0:b2805b6888dc 1867 break;
robert_jw 0:b2805b6888dc 1868 default:
robert_jw 0:b2805b6888dc 1869 printer(arg, "0x%x", cishort);
robert_jw 0:b2805b6888dc 1870 }
robert_jw 0:b2805b6888dc 1871 }
robert_jw 0:b2805b6888dc 1872 break;
robert_jw 0:b2805b6888dc 1873 case CI_MAGICNUMBER:
robert_jw 0:b2805b6888dc 1874 if (olen == CILEN_LONG) {
robert_jw 0:b2805b6888dc 1875 p += 2;
robert_jw 0:b2805b6888dc 1876 GETLONG(cilong, p);
robert_jw 0:b2805b6888dc 1877 printer(arg, "magic 0x%x", cilong);
robert_jw 0:b2805b6888dc 1878 }
robert_jw 0:b2805b6888dc 1879 break;
robert_jw 0:b2805b6888dc 1880 case CI_PCOMPRESSION:
robert_jw 0:b2805b6888dc 1881 if (olen == CILEN_VOID) {
robert_jw 0:b2805b6888dc 1882 p += 2;
robert_jw 0:b2805b6888dc 1883 printer(arg, "pcomp");
robert_jw 0:b2805b6888dc 1884 }
robert_jw 0:b2805b6888dc 1885 break;
robert_jw 0:b2805b6888dc 1886 case CI_ACCOMPRESSION:
robert_jw 0:b2805b6888dc 1887 if (olen == CILEN_VOID) {
robert_jw 0:b2805b6888dc 1888 p += 2;
robert_jw 0:b2805b6888dc 1889 printer(arg, "accomp");
robert_jw 0:b2805b6888dc 1890 }
robert_jw 0:b2805b6888dc 1891 break;
robert_jw 0:b2805b6888dc 1892 }
robert_jw 0:b2805b6888dc 1893 while (p < optend) {
robert_jw 0:b2805b6888dc 1894 GETCHAR(code, p);
robert_jw 0:b2805b6888dc 1895 printer(arg, " %.2x", code);
robert_jw 0:b2805b6888dc 1896 }
robert_jw 0:b2805b6888dc 1897 printer(arg, ">");
robert_jw 0:b2805b6888dc 1898 }
robert_jw 0:b2805b6888dc 1899 break;
robert_jw 0:b2805b6888dc 1900
robert_jw 0:b2805b6888dc 1901 case TERMACK:
robert_jw 0:b2805b6888dc 1902 case TERMREQ:
robert_jw 0:b2805b6888dc 1903 if (len > 0 && *p >= ' ' && *p < 0x7f) {
robert_jw 0:b2805b6888dc 1904 printer(arg, " ");
robert_jw 0:b2805b6888dc 1905 print_string((char*)p, len, printer, arg);
robert_jw 0:b2805b6888dc 1906 p += len;
robert_jw 0:b2805b6888dc 1907 len = 0;
robert_jw 0:b2805b6888dc 1908 }
robert_jw 0:b2805b6888dc 1909 break;
robert_jw 0:b2805b6888dc 1910
robert_jw 0:b2805b6888dc 1911 case ECHOREQ:
robert_jw 0:b2805b6888dc 1912 case ECHOREP:
robert_jw 0:b2805b6888dc 1913 case DISCREQ:
robert_jw 0:b2805b6888dc 1914 if (len >= 4) {
robert_jw 0:b2805b6888dc 1915 GETLONG(cilong, p);
robert_jw 0:b2805b6888dc 1916 printer(arg, " magic=0x%x", cilong);
robert_jw 0:b2805b6888dc 1917 p += 4;
robert_jw 0:b2805b6888dc 1918 len -= 4;
robert_jw 0:b2805b6888dc 1919 }
robert_jw 0:b2805b6888dc 1920 break;
robert_jw 0:b2805b6888dc 1921 }
robert_jw 0:b2805b6888dc 1922
robert_jw 0:b2805b6888dc 1923 /* print the rest of the bytes in the packet */
robert_jw 0:b2805b6888dc 1924 for (; len > 0; --len) {
robert_jw 0:b2805b6888dc 1925 GETCHAR(code, p);
robert_jw 0:b2805b6888dc 1926 printer(arg, " %.2x", code);
robert_jw 0:b2805b6888dc 1927 }
robert_jw 0:b2805b6888dc 1928
robert_jw 0:b2805b6888dc 1929 return (int)(p - pstart);
robert_jw 0:b2805b6888dc 1930 }
robert_jw 0:b2805b6888dc 1931 #endif /* PPP_ADDITIONAL_CALLBACKS */
robert_jw 0:b2805b6888dc 1932
robert_jw 0:b2805b6888dc 1933 /*
robert_jw 0:b2805b6888dc 1934 * Time to shut down the link because there is nothing out there.
robert_jw 0:b2805b6888dc 1935 */
robert_jw 0:b2805b6888dc 1936 static void
robert_jw 0:b2805b6888dc 1937 LcpLinkFailure (fsm *f)
robert_jw 0:b2805b6888dc 1938 {
robert_jw 0:b2805b6888dc 1939 if (f->state == LS_OPENED) {
robert_jw 0:b2805b6888dc 1940 LCPDEBUG(LOG_INFO, ("No response to %d echo-requests\n", lcp_echos_pending));
robert_jw 0:b2805b6888dc 1941 LCPDEBUG(LOG_NOTICE, ("Serial link appears to be disconnected.\n"));
robert_jw 0:b2805b6888dc 1942 lcp_close(f->unit, "Peer not responding");
robert_jw 0:b2805b6888dc 1943 }
robert_jw 0:b2805b6888dc 1944 }
robert_jw 0:b2805b6888dc 1945
robert_jw 0:b2805b6888dc 1946 /*
robert_jw 0:b2805b6888dc 1947 * Timer expired for the LCP echo requests from this process.
robert_jw 0:b2805b6888dc 1948 */
robert_jw 0:b2805b6888dc 1949 static void
robert_jw 0:b2805b6888dc 1950 LcpEchoCheck (fsm *f)
robert_jw 0:b2805b6888dc 1951 {
robert_jw 0:b2805b6888dc 1952 LcpSendEchoRequest (f);
robert_jw 0:b2805b6888dc 1953
robert_jw 0:b2805b6888dc 1954 /*
robert_jw 0:b2805b6888dc 1955 * Start the timer for the next interval.
robert_jw 0:b2805b6888dc 1956 */
robert_jw 0:b2805b6888dc 1957 LWIP_ASSERT("lcp_echo_timer_running == 0", lcp_echo_timer_running == 0);
robert_jw 0:b2805b6888dc 1958
robert_jw 0:b2805b6888dc 1959 TIMEOUT (LcpEchoTimeout, f, lcp_echo_interval);
robert_jw 0:b2805b6888dc 1960 lcp_echo_timer_running = 1;
robert_jw 0:b2805b6888dc 1961 }
robert_jw 0:b2805b6888dc 1962
robert_jw 0:b2805b6888dc 1963 /*
robert_jw 0:b2805b6888dc 1964 * LcpEchoTimeout - Timer expired on the LCP echo
robert_jw 0:b2805b6888dc 1965 */
robert_jw 0:b2805b6888dc 1966 static void
robert_jw 0:b2805b6888dc 1967 LcpEchoTimeout (void *arg)
robert_jw 0:b2805b6888dc 1968 {
robert_jw 0:b2805b6888dc 1969 if (lcp_echo_timer_running != 0) {
robert_jw 0:b2805b6888dc 1970 lcp_echo_timer_running = 0;
robert_jw 0:b2805b6888dc 1971 LcpEchoCheck ((fsm *) arg);
robert_jw 0:b2805b6888dc 1972 }
robert_jw 0:b2805b6888dc 1973 }
robert_jw 0:b2805b6888dc 1974
robert_jw 0:b2805b6888dc 1975 /*
robert_jw 0:b2805b6888dc 1976 * LcpEchoReply - LCP has received a reply to the echo
robert_jw 0:b2805b6888dc 1977 */
robert_jw 0:b2805b6888dc 1978 static void
robert_jw 0:b2805b6888dc 1979 lcp_received_echo_reply (fsm *f, int id, u_char *inp, int len)
robert_jw 0:b2805b6888dc 1980 {
robert_jw 0:b2805b6888dc 1981 u32_t magic;
robert_jw 0:b2805b6888dc 1982
robert_jw 0:b2805b6888dc 1983 LWIP_UNUSED_ARG(id);
robert_jw 0:b2805b6888dc 1984
robert_jw 0:b2805b6888dc 1985 /* Check the magic number - don't count replies from ourselves. */
robert_jw 0:b2805b6888dc 1986 if (len < 4) {
robert_jw 0:b2805b6888dc 1987 LCPDEBUG(LOG_WARNING, ("lcp: received short Echo-Reply, length %d\n", len));
robert_jw 0:b2805b6888dc 1988 return;
robert_jw 0:b2805b6888dc 1989 }
robert_jw 0:b2805b6888dc 1990 GETLONG(magic, inp);
robert_jw 0:b2805b6888dc 1991 if (lcp_gotoptions[f->unit].neg_magicnumber && magic == lcp_gotoptions[f->unit].magicnumber) {
robert_jw 0:b2805b6888dc 1992 LCPDEBUG(LOG_WARNING, ("appear to have received our own echo-reply!\n"));
robert_jw 0:b2805b6888dc 1993 return;
robert_jw 0:b2805b6888dc 1994 }
robert_jw 0:b2805b6888dc 1995
robert_jw 0:b2805b6888dc 1996 /* Reset the number of outstanding echo frames */
robert_jw 0:b2805b6888dc 1997 lcp_echos_pending = 0;
robert_jw 0:b2805b6888dc 1998 }
robert_jw 0:b2805b6888dc 1999
robert_jw 0:b2805b6888dc 2000 /*
robert_jw 0:b2805b6888dc 2001 * LcpSendEchoRequest - Send an echo request frame to the peer
robert_jw 0:b2805b6888dc 2002 */
robert_jw 0:b2805b6888dc 2003 static void
robert_jw 0:b2805b6888dc 2004 LcpSendEchoRequest (fsm *f)
robert_jw 0:b2805b6888dc 2005 {
robert_jw 0:b2805b6888dc 2006 u32_t lcp_magic;
robert_jw 0:b2805b6888dc 2007 u_char pkt[4], *pktp;
robert_jw 0:b2805b6888dc 2008
robert_jw 0:b2805b6888dc 2009 /*
robert_jw 0:b2805b6888dc 2010 * Detect the failure of the peer at this point.
robert_jw 0:b2805b6888dc 2011 */
robert_jw 0:b2805b6888dc 2012 if (lcp_echo_fails != 0) {
robert_jw 0:b2805b6888dc 2013 if (lcp_echos_pending >= lcp_echo_fails) {
robert_jw 0:b2805b6888dc 2014 LcpLinkFailure(f);
robert_jw 0:b2805b6888dc 2015 lcp_echos_pending = 0;
robert_jw 0:b2805b6888dc 2016 }
robert_jw 0:b2805b6888dc 2017 }
robert_jw 0:b2805b6888dc 2018
robert_jw 0:b2805b6888dc 2019 /*
robert_jw 0:b2805b6888dc 2020 * Make and send the echo request frame.
robert_jw 0:b2805b6888dc 2021 */
robert_jw 0:b2805b6888dc 2022 if (f->state == LS_OPENED) {
robert_jw 0:b2805b6888dc 2023 lcp_magic = lcp_gotoptions[f->unit].magicnumber;
robert_jw 0:b2805b6888dc 2024 pktp = pkt;
robert_jw 0:b2805b6888dc 2025 PUTLONG(lcp_magic, pktp);
robert_jw 0:b2805b6888dc 2026 fsm_sdata(f, ECHOREQ, (u_char)(lcp_echo_number++ & 0xFF), pkt, (int)(pktp - pkt));
robert_jw 0:b2805b6888dc 2027 ++lcp_echos_pending;
robert_jw 0:b2805b6888dc 2028 }
robert_jw 0:b2805b6888dc 2029 }
robert_jw 0:b2805b6888dc 2030
robert_jw 0:b2805b6888dc 2031 /*
robert_jw 0:b2805b6888dc 2032 * lcp_echo_lowerup - Start the timer for the LCP frame
robert_jw 0:b2805b6888dc 2033 */
robert_jw 0:b2805b6888dc 2034
robert_jw 0:b2805b6888dc 2035 static void
robert_jw 0:b2805b6888dc 2036 lcp_echo_lowerup (int unit)
robert_jw 0:b2805b6888dc 2037 {
robert_jw 0:b2805b6888dc 2038 fsm *f = &lcp_fsm[unit];
robert_jw 0:b2805b6888dc 2039
robert_jw 0:b2805b6888dc 2040 /* Clear the parameters for generating echo frames */
robert_jw 0:b2805b6888dc 2041 lcp_echos_pending = 0;
robert_jw 0:b2805b6888dc 2042 lcp_echo_number = 0;
robert_jw 0:b2805b6888dc 2043 lcp_echo_timer_running = 0;
robert_jw 0:b2805b6888dc 2044
robert_jw 0:b2805b6888dc 2045 /* If a timeout interval is specified then start the timer */
robert_jw 0:b2805b6888dc 2046 if (lcp_echo_interval != 0) {
robert_jw 0:b2805b6888dc 2047 LcpEchoCheck (f);
robert_jw 0:b2805b6888dc 2048 }
robert_jw 0:b2805b6888dc 2049 }
robert_jw 0:b2805b6888dc 2050
robert_jw 0:b2805b6888dc 2051 /*
robert_jw 0:b2805b6888dc 2052 * lcp_echo_lowerdown - Stop the timer for the LCP frame
robert_jw 0:b2805b6888dc 2053 */
robert_jw 0:b2805b6888dc 2054
robert_jw 0:b2805b6888dc 2055 static void
robert_jw 0:b2805b6888dc 2056 lcp_echo_lowerdown (int unit)
robert_jw 0:b2805b6888dc 2057 {
robert_jw 0:b2805b6888dc 2058 fsm *f = &lcp_fsm[unit];
robert_jw 0:b2805b6888dc 2059
robert_jw 0:b2805b6888dc 2060 if (lcp_echo_timer_running != 0) {
robert_jw 0:b2805b6888dc 2061 UNTIMEOUT (LcpEchoTimeout, f);
robert_jw 0:b2805b6888dc 2062 lcp_echo_timer_running = 0;
robert_jw 0:b2805b6888dc 2063 }
robert_jw 0:b2805b6888dc 2064 }
robert_jw 0:b2805b6888dc 2065
robert_jw 0:b2805b6888dc 2066 #endif /* PPP_SUPPORT */