[457] | 1 | /*
|
---|
| 2 | * lcp.c - PPP Link Control Protocol.
|
---|
| 3 | *
|
---|
| 4 | * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
|
---|
| 5 | *
|
---|
| 6 | * Redistribution and use in source and binary forms, with or without
|
---|
| 7 | * modification, are permitted provided that the following conditions
|
---|
| 8 | * are met:
|
---|
| 9 | *
|
---|
| 10 | * 1. Redistributions of source code must retain the above copyright
|
---|
| 11 | * notice, this list of conditions and the following disclaimer.
|
---|
| 12 | *
|
---|
| 13 | * 2. Redistributions in binary form must reproduce the above copyright
|
---|
| 14 | * notice, this list of conditions and the following disclaimer in
|
---|
| 15 | * the documentation and/or other materials provided with the
|
---|
| 16 | * distribution.
|
---|
| 17 | *
|
---|
| 18 | * 3. The name "Carnegie Mellon University" must not be used to
|
---|
| 19 | * endorse or promote products derived from this software without
|
---|
| 20 | * prior written permission. For permission or any legal
|
---|
| 21 | * details, please contact
|
---|
| 22 | * Office of Technology Transfer
|
---|
| 23 | * Carnegie Mellon University
|
---|
| 24 | * 5000 Forbes Avenue
|
---|
| 25 | * Pittsburgh, PA 15213-3890
|
---|
| 26 | * (412) 268-4387, fax: (412) 268-7395
|
---|
| 27 | * tech-transfer@andrew.cmu.edu
|
---|
| 28 | *
|
---|
| 29 | * 4. Redistributions of any form whatsoever must retain the following
|
---|
| 30 | * acknowledgment:
|
---|
| 31 | * "This product includes software developed by Computing Services
|
---|
| 32 | * at Carnegie Mellon University (http://www.cmu.edu/computing/)."
|
---|
| 33 | *
|
---|
| 34 | * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
|
---|
| 35 | * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
|
---|
| 36 | * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
|
---|
| 37 | * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
---|
| 38 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
|
---|
| 39 | * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
|
---|
| 40 | * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
---|
| 41 | */
|
---|
| 42 |
|
---|
| 43 | #include "netif/ppp/ppp_opts.h"
|
---|
| 44 | #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
|
---|
| 45 |
|
---|
| 46 | /*
|
---|
| 47 | * @todo:
|
---|
| 48 | */
|
---|
| 49 |
|
---|
| 50 | #if 0 /* UNUSED */
|
---|
| 51 | #include <stdio.h>
|
---|
| 52 | #include <string.h>
|
---|
| 53 | #include <stdlib.h>
|
---|
| 54 | #endif /* UNUSED */
|
---|
| 55 |
|
---|
| 56 | #include "netif/ppp/ppp_impl.h"
|
---|
| 57 |
|
---|
| 58 | #include "netif/ppp/fsm.h"
|
---|
| 59 | #include "netif/ppp/lcp.h"
|
---|
| 60 | #if CHAP_SUPPORT
|
---|
| 61 | #include "netif/ppp/chap-new.h"
|
---|
| 62 | #endif /* CHAP_SUPPORT */
|
---|
| 63 | #include "netif/ppp/magic.h"
|
---|
| 64 |
|
---|
| 65 | /*
|
---|
| 66 | * When the link comes up we want to be able to wait for a short while,
|
---|
| 67 | * or until seeing some input from the peer, before starting to send
|
---|
| 68 | * configure-requests. We do this by delaying the fsm_lowerup call.
|
---|
| 69 | */
|
---|
| 70 | /* steal a bit in fsm flags word */
|
---|
| 71 | #define DELAYED_UP 0x80
|
---|
| 72 |
|
---|
| 73 | static void lcp_delayed_up(void *arg);
|
---|
| 74 |
|
---|
| 75 | /*
|
---|
| 76 | * LCP-related command-line options.
|
---|
| 77 | */
|
---|
| 78 | #if 0 /* UNUSED */
|
---|
| 79 | int lcp_echo_interval = 0; /* Interval between LCP echo-requests */
|
---|
| 80 | int lcp_echo_fails = 0; /* Tolerance to unanswered echo-requests */
|
---|
| 81 | #endif /* UNUSED */
|
---|
| 82 |
|
---|
| 83 | #if 0 /* UNUSED */
|
---|
| 84 | /* options */
|
---|
| 85 | static u_int lcp_echo_interval = LCP_ECHOINTERVAL; /* Interval between LCP echo-requests */
|
---|
| 86 | static u_int lcp_echo_fails = LCP_MAXECHOFAILS; /* Tolerance to unanswered echo-requests */
|
---|
| 87 | #endif /* UNUSED */
|
---|
| 88 |
|
---|
| 89 | #if 0 /* UNUSED */
|
---|
| 90 | #if PPP_LCP_ADAPTIVE
|
---|
| 91 | bool lcp_echo_adaptive = 0; /* request echo only if the link was idle */
|
---|
| 92 | #endif
|
---|
| 93 | bool lax_recv = 0; /* accept control chars in asyncmap */
|
---|
| 94 | bool noendpoint = 0; /* don't send/accept endpoint discriminator */
|
---|
| 95 | #endif /* UNUSED */
|
---|
| 96 |
|
---|
| 97 | #if PPP_OPTIONS
|
---|
| 98 | static int noopt (char **);
|
---|
| 99 | #endif /* PPP_OPTIONS */
|
---|
| 100 |
|
---|
| 101 | #ifdef HAVE_MULTILINK
|
---|
| 102 | static int setendpoint (char **);
|
---|
| 103 | static void printendpoint (option_t *, void (*)(void *, char *, ...),
|
---|
| 104 | void *);
|
---|
| 105 | #endif /* HAVE_MULTILINK */
|
---|
| 106 |
|
---|
| 107 | #if PPP_OPTIONS
|
---|
| 108 | static option_t lcp_option_list[] = {
|
---|
| 109 | /* LCP options */
|
---|
| 110 | { "-all", o_special_noarg, (void *)noopt,
|
---|
| 111 | "Don't request/allow any LCP options" },
|
---|
| 112 |
|
---|
| 113 | { "noaccomp", o_bool, &lcp_wantoptions[0].neg_accompression,
|
---|
| 114 | "Disable address/control compression",
|
---|
| 115 | OPT_A2CLR, &lcp_allowoptions[0].neg_accompression },
|
---|
| 116 | { "-ac", o_bool, &lcp_wantoptions[0].neg_accompression,
|
---|
| 117 | "Disable address/control compression",
|
---|
| 118 | OPT_ALIAS | OPT_A2CLR, &lcp_allowoptions[0].neg_accompression },
|
---|
| 119 |
|
---|
| 120 | { "asyncmap", o_uint32, &lcp_wantoptions[0].asyncmap,
|
---|
| 121 | "Set asyncmap (for received packets)",
|
---|
| 122 | OPT_OR, &lcp_wantoptions[0].neg_asyncmap },
|
---|
| 123 | { "-as", o_uint32, &lcp_wantoptions[0].asyncmap,
|
---|
| 124 | "Set asyncmap (for received packets)",
|
---|
| 125 | OPT_ALIAS | OPT_OR, &lcp_wantoptions[0].neg_asyncmap },
|
---|
| 126 | { "default-asyncmap", o_uint32, &lcp_wantoptions[0].asyncmap,
|
---|
| 127 | "Disable asyncmap negotiation",
|
---|
| 128 | OPT_OR | OPT_NOARG | OPT_VAL(~0U) | OPT_A2CLR,
|
---|
| 129 | &lcp_allowoptions[0].neg_asyncmap },
|
---|
| 130 | { "-am", o_uint32, &lcp_wantoptions[0].asyncmap,
|
---|
| 131 | "Disable asyncmap negotiation",
|
---|
| 132 | OPT_ALIAS | OPT_OR | OPT_NOARG | OPT_VAL(~0U) | OPT_A2CLR,
|
---|
| 133 | &lcp_allowoptions[0].neg_asyncmap },
|
---|
| 134 |
|
---|
| 135 | { "nomagic", o_bool, &lcp_wantoptions[0].neg_magicnumber,
|
---|
| 136 | "Disable magic number negotiation (looped-back line detection)",
|
---|
| 137 | OPT_A2CLR, &lcp_allowoptions[0].neg_magicnumber },
|
---|
| 138 | { "-mn", o_bool, &lcp_wantoptions[0].neg_magicnumber,
|
---|
| 139 | "Disable magic number negotiation (looped-back line detection)",
|
---|
| 140 | OPT_ALIAS | OPT_A2CLR, &lcp_allowoptions[0].neg_magicnumber },
|
---|
| 141 |
|
---|
| 142 | { "mru", o_int, &lcp_wantoptions[0].mru,
|
---|
| 143 | "Set MRU (maximum received packet size) for negotiation",
|
---|
| 144 | OPT_PRIO, &lcp_wantoptions[0].neg_mru },
|
---|
| 145 | { "default-mru", o_bool, &lcp_wantoptions[0].neg_mru,
|
---|
| 146 | "Disable MRU negotiation (use default 1500)",
|
---|
| 147 | OPT_PRIOSUB | OPT_A2CLR, &lcp_allowoptions[0].neg_mru },
|
---|
| 148 | { "-mru", o_bool, &lcp_wantoptions[0].neg_mru,
|
---|
| 149 | "Disable MRU negotiation (use default 1500)",
|
---|
| 150 | OPT_ALIAS | OPT_PRIOSUB | OPT_A2CLR, &lcp_allowoptions[0].neg_mru },
|
---|
| 151 |
|
---|
| 152 | { "mtu", o_int, &lcp_allowoptions[0].mru,
|
---|
| 153 | "Set our MTU", OPT_LIMITS, NULL, MAXMRU, MINMRU },
|
---|
| 154 |
|
---|
| 155 | { "nopcomp", o_bool, &lcp_wantoptions[0].neg_pcompression,
|
---|
| 156 | "Disable protocol field compression",
|
---|
| 157 | OPT_A2CLR, &lcp_allowoptions[0].neg_pcompression },
|
---|
| 158 | { "-pc", o_bool, &lcp_wantoptions[0].neg_pcompression,
|
---|
| 159 | "Disable protocol field compression",
|
---|
| 160 | OPT_ALIAS | OPT_A2CLR, &lcp_allowoptions[0].neg_pcompression },
|
---|
| 161 |
|
---|
| 162 | { "passive", o_bool, &lcp_wantoptions[0].passive,
|
---|
| 163 | "Set passive mode", 1 },
|
---|
| 164 | { "-p", o_bool, &lcp_wantoptions[0].passive,
|
---|
| 165 | "Set passive mode", OPT_ALIAS | 1 },
|
---|
| 166 |
|
---|
| 167 | { "silent", o_bool, &lcp_wantoptions[0].silent,
|
---|
| 168 | "Set silent mode", 1 },
|
---|
| 169 |
|
---|
| 170 | { "lcp-echo-failure", o_int, &lcp_echo_fails,
|
---|
| 171 | "Set number of consecutive echo failures to indicate link failure",
|
---|
| 172 | OPT_PRIO },
|
---|
| 173 | { "lcp-echo-interval", o_int, &lcp_echo_interval,
|
---|
| 174 | "Set time in seconds between LCP echo requests", OPT_PRIO },
|
---|
| 175 | #if PPP_LCP_ADAPTIVE
|
---|
| 176 | { "lcp-echo-adaptive", o_bool, &lcp_echo_adaptive,
|
---|
| 177 | "Suppress LCP echo requests if traffic was received", 1 },
|
---|
| 178 | #endif
|
---|
| 179 | { "lcp-restart", o_int, &lcp_fsm[0].timeouttime,
|
---|
| 180 | "Set time in seconds between LCP retransmissions", OPT_PRIO },
|
---|
| 181 | { "lcp-max-terminate", o_int, &lcp_fsm[0].maxtermtransmits,
|
---|
| 182 | "Set maximum number of LCP terminate-request transmissions", OPT_PRIO },
|
---|
| 183 | { "lcp-max-configure", o_int, &lcp_fsm[0].maxconfreqtransmits,
|
---|
| 184 | "Set maximum number of LCP configure-request transmissions", OPT_PRIO },
|
---|
| 185 | { "lcp-max-failure", o_int, &lcp_fsm[0].maxnakloops,
|
---|
| 186 | "Set limit on number of LCP configure-naks", OPT_PRIO },
|
---|
| 187 |
|
---|
| 188 | { "receive-all", o_bool, &lax_recv,
|
---|
| 189 | "Accept all received control characters", 1 },
|
---|
| 190 |
|
---|
| 191 | #ifdef HAVE_MULTILINK
|
---|
| 192 | { "mrru", o_int, &lcp_wantoptions[0].mrru,
|
---|
| 193 | "Maximum received packet size for multilink bundle",
|
---|
| 194 | OPT_PRIO, &lcp_wantoptions[0].neg_mrru },
|
---|
| 195 |
|
---|
| 196 | { "mpshortseq", o_bool, &lcp_wantoptions[0].neg_ssnhf,
|
---|
| 197 | "Use short sequence numbers in multilink headers",
|
---|
| 198 | OPT_PRIO | 1, &lcp_allowoptions[0].neg_ssnhf },
|
---|
| 199 | { "nompshortseq", o_bool, &lcp_wantoptions[0].neg_ssnhf,
|
---|
| 200 | "Don't use short sequence numbers in multilink headers",
|
---|
| 201 | OPT_PRIOSUB | OPT_A2CLR, &lcp_allowoptions[0].neg_ssnhf },
|
---|
| 202 |
|
---|
| 203 | { "endpoint", o_special, (void *) setendpoint,
|
---|
| 204 | "Endpoint discriminator for multilink",
|
---|
| 205 | OPT_PRIO | OPT_A2PRINTER, (void *) printendpoint },
|
---|
| 206 | #endif /* HAVE_MULTILINK */
|
---|
| 207 |
|
---|
| 208 | { "noendpoint", o_bool, &noendpoint,
|
---|
| 209 | "Don't send or accept multilink endpoint discriminator", 1 },
|
---|
| 210 |
|
---|
| 211 | {NULL}
|
---|
| 212 | };
|
---|
| 213 | #endif /* PPP_OPTIONS */
|
---|
| 214 |
|
---|
| 215 | /*
|
---|
| 216 | * Callbacks for fsm code. (CI = Configuration Information)
|
---|
| 217 | */
|
---|
| 218 | static void lcp_resetci(fsm *f); /* Reset our CI */
|
---|
| 219 | static int lcp_cilen(fsm *f); /* Return length of our CI */
|
---|
| 220 | static void lcp_addci(fsm *f, u_char *ucp, int *lenp); /* Add our CI to pkt */
|
---|
| 221 | static int lcp_ackci(fsm *f, u_char *p, int len); /* Peer ack'd our CI */
|
---|
| 222 | static int lcp_nakci(fsm *f, u_char *p, int len, int treat_as_reject); /* Peer nak'd our CI */
|
---|
| 223 | static int lcp_rejci(fsm *f, u_char *p, int len); /* Peer rej'd our CI */
|
---|
| 224 | static int lcp_reqci(fsm *f, u_char *inp, int *lenp, int reject_if_disagree); /* Rcv peer CI */
|
---|
| 225 | static void lcp_up(fsm *f); /* We're UP */
|
---|
| 226 | static void lcp_down(fsm *f); /* We're DOWN */
|
---|
| 227 | static void lcp_starting (fsm *); /* We need lower layer up */
|
---|
| 228 | static void lcp_finished (fsm *); /* We need lower layer down */
|
---|
| 229 | static int lcp_extcode(fsm *f, int code, int id, u_char *inp, int len);
|
---|
| 230 | static void lcp_rprotrej(fsm *f, u_char *inp, int len);
|
---|
| 231 |
|
---|
| 232 | /*
|
---|
| 233 | * routines to send LCP echos to peer
|
---|
| 234 | */
|
---|
| 235 |
|
---|
| 236 | static void lcp_echo_lowerup(ppp_pcb *pcb);
|
---|
| 237 | static void lcp_echo_lowerdown(ppp_pcb *pcb);
|
---|
| 238 | static void LcpEchoTimeout(void *arg);
|
---|
| 239 | static void lcp_received_echo_reply(fsm *f, int id, u_char *inp, int len);
|
---|
| 240 | static void LcpSendEchoRequest(fsm *f);
|
---|
| 241 | static void LcpLinkFailure(fsm *f);
|
---|
| 242 | static void LcpEchoCheck(fsm *f);
|
---|
| 243 |
|
---|
| 244 | static const fsm_callbacks lcp_callbacks = { /* LCP callback routines */
|
---|
| 245 | lcp_resetci, /* Reset our Configuration Information */
|
---|
| 246 | lcp_cilen, /* Length of our Configuration Information */
|
---|
| 247 | lcp_addci, /* Add our Configuration Information */
|
---|
| 248 | lcp_ackci, /* ACK our Configuration Information */
|
---|
| 249 | lcp_nakci, /* NAK our Configuration Information */
|
---|
| 250 | lcp_rejci, /* Reject our Configuration Information */
|
---|
| 251 | lcp_reqci, /* Request peer's Configuration Information */
|
---|
| 252 | lcp_up, /* Called when fsm reaches OPENED state */
|
---|
| 253 | lcp_down, /* Called when fsm leaves OPENED state */
|
---|
| 254 | lcp_starting, /* Called when we want the lower layer up */
|
---|
| 255 | lcp_finished, /* Called when we want the lower layer down */
|
---|
| 256 | NULL, /* Called when Protocol-Reject received */
|
---|
| 257 | NULL, /* Retransmission is necessary */
|
---|
| 258 | lcp_extcode, /* Called to handle LCP-specific codes */
|
---|
| 259 | "LCP" /* String name of protocol */
|
---|
| 260 | };
|
---|
| 261 |
|
---|
| 262 | /*
|
---|
| 263 | * Protocol entry points.
|
---|
| 264 | * Some of these are called directly.
|
---|
| 265 | */
|
---|
| 266 |
|
---|
| 267 | static void lcp_init(ppp_pcb *pcb);
|
---|
| 268 | static void lcp_input(ppp_pcb *pcb, u_char *p, int len);
|
---|
| 269 | static void lcp_protrej(ppp_pcb *pcb);
|
---|
| 270 | #if PRINTPKT_SUPPORT
|
---|
| 271 | static int lcp_printpkt(const u_char *p, int plen,
|
---|
| 272 | void (*printer) (void *, const char *, ...), void *arg);
|
---|
| 273 | #endif /* PRINTPKT_SUPPORT */
|
---|
| 274 |
|
---|
| 275 | const struct protent lcp_protent = {
|
---|
| 276 | PPP_LCP,
|
---|
| 277 | lcp_init,
|
---|
| 278 | lcp_input,
|
---|
| 279 | lcp_protrej,
|
---|
| 280 | lcp_lowerup,
|
---|
| 281 | lcp_lowerdown,
|
---|
| 282 | lcp_open,
|
---|
| 283 | lcp_close,
|
---|
| 284 | #if PRINTPKT_SUPPORT
|
---|
| 285 | lcp_printpkt,
|
---|
| 286 | #endif /* PRINTPKT_SUPPORT */
|
---|
| 287 | #if PPP_DATAINPUT
|
---|
| 288 | NULL,
|
---|
| 289 | #endif /* PPP_DATAINPUT */
|
---|
| 290 | #if PRINTPKT_SUPPORT
|
---|
| 291 | "LCP",
|
---|
| 292 | NULL,
|
---|
| 293 | #endif /* PRINTPKT_SUPPORT */
|
---|
| 294 | #if PPP_OPTIONS
|
---|
| 295 | lcp_option_list,
|
---|
| 296 | NULL,
|
---|
| 297 | #endif /* PPP_OPTIONS */
|
---|
| 298 | #if DEMAND_SUPPORT
|
---|
| 299 | NULL,
|
---|
| 300 | NULL
|
---|
| 301 | #endif /* DEMAND_SUPPORT */
|
---|
| 302 | };
|
---|
| 303 |
|
---|
| 304 | /*
|
---|
| 305 | * Length of each type of configuration option (in octets)
|
---|
| 306 | */
|
---|
| 307 | #define CILEN_VOID 2
|
---|
| 308 | #define CILEN_CHAR 3
|
---|
| 309 | #define CILEN_SHORT 4 /* CILEN_VOID + 2 */
|
---|
| 310 | #if CHAP_SUPPORT
|
---|
| 311 | #define CILEN_CHAP 5 /* CILEN_VOID + 2 + 1 */
|
---|
| 312 | #endif /* CHAP_SUPPORT */
|
---|
| 313 | #define CILEN_LONG 6 /* CILEN_VOID + 4 */
|
---|
| 314 | #if LQR_SUPPORT
|
---|
| 315 | #define CILEN_LQR 8 /* CILEN_VOID + 2 + 4 */
|
---|
| 316 | #endif /* LQR_SUPPORT */
|
---|
| 317 | #define CILEN_CBCP 3
|
---|
| 318 |
|
---|
| 319 | #define CODENAME(x) ((x) == CONFACK ? "ACK" : \
|
---|
| 320 | (x) == CONFNAK ? "NAK" : "REJ")
|
---|
| 321 |
|
---|
| 322 | #if PPP_OPTIONS
|
---|
| 323 | /*
|
---|
| 324 | * noopt - Disable all options (why?).
|
---|
| 325 | */
|
---|
| 326 | static int
|
---|
| 327 | noopt(argv)
|
---|
| 328 | char **argv;
|
---|
| 329 | {
|
---|
| 330 | BZERO((char *) &lcp_wantoptions[0], sizeof (struct lcp_options));
|
---|
| 331 | BZERO((char *) &lcp_allowoptions[0], sizeof (struct lcp_options));
|
---|
| 332 |
|
---|
| 333 | return (1);
|
---|
| 334 | }
|
---|
| 335 | #endif /* PPP_OPTIONS */
|
---|
| 336 |
|
---|
| 337 | #ifdef HAVE_MULTILINK
|
---|
| 338 | static int
|
---|
| 339 | setendpoint(argv)
|
---|
| 340 | char **argv;
|
---|
| 341 | {
|
---|
| 342 | if (str_to_epdisc(&lcp_wantoptions[0].endpoint, *argv)) {
|
---|
| 343 | lcp_wantoptions[0].neg_endpoint = 1;
|
---|
| 344 | return 1;
|
---|
| 345 | }
|
---|
| 346 | option_error("Can't parse '%s' as an endpoint discriminator", *argv);
|
---|
| 347 | return 0;
|
---|
| 348 | }
|
---|
| 349 |
|
---|
| 350 | static void
|
---|
| 351 | printendpoint(opt, printer, arg)
|
---|
| 352 | option_t *opt;
|
---|
| 353 | void (*printer) (void *, char *, ...);
|
---|
| 354 | void *arg;
|
---|
| 355 | {
|
---|
| 356 | printer(arg, "%s", epdisc_to_str(&lcp_wantoptions[0].endpoint));
|
---|
| 357 | }
|
---|
| 358 | #endif /* HAVE_MULTILINK */
|
---|
| 359 |
|
---|
| 360 | /*
|
---|
| 361 | * lcp_init - Initialize LCP.
|
---|
| 362 | */
|
---|
| 363 | static void lcp_init(ppp_pcb *pcb) {
|
---|
| 364 | fsm *f = &pcb->lcp_fsm;
|
---|
| 365 | lcp_options *wo = &pcb->lcp_wantoptions;
|
---|
| 366 | lcp_options *ao = &pcb->lcp_allowoptions;
|
---|
| 367 |
|
---|
| 368 | f->pcb = pcb;
|
---|
| 369 | f->protocol = PPP_LCP;
|
---|
| 370 | f->callbacks = &lcp_callbacks;
|
---|
| 371 |
|
---|
| 372 | fsm_init(f);
|
---|
| 373 |
|
---|
| 374 | BZERO(wo, sizeof(*wo));
|
---|
| 375 | wo->neg_mru = 1;
|
---|
| 376 | wo->mru = PPP_DEFMRU;
|
---|
| 377 | wo->neg_asyncmap = 1;
|
---|
| 378 | wo->neg_magicnumber = 1;
|
---|
| 379 | wo->neg_pcompression = 1;
|
---|
| 380 | wo->neg_accompression = 1;
|
---|
| 381 |
|
---|
| 382 | BZERO(ao, sizeof(*ao));
|
---|
| 383 | ao->neg_mru = 1;
|
---|
| 384 | ao->mru = PPP_MAXMRU;
|
---|
| 385 | ao->neg_asyncmap = 1;
|
---|
| 386 | #if CHAP_SUPPORT
|
---|
| 387 | ao->neg_chap = 1;
|
---|
| 388 | ao->chap_mdtype = CHAP_MDTYPE_SUPPORTED;
|
---|
| 389 | #endif /* CHAP_SUPPORT */
|
---|
| 390 | #if PAP_SUPPORT
|
---|
| 391 | ao->neg_upap = 1;
|
---|
| 392 | #endif /* PAP_SUPPORT */
|
---|
| 393 | #if EAP_SUPPORT
|
---|
| 394 | ao->neg_eap = 1;
|
---|
| 395 | #endif /* EAP_SUPPORT */
|
---|
| 396 | ao->neg_magicnumber = 1;
|
---|
| 397 | ao->neg_pcompression = 1;
|
---|
| 398 | ao->neg_accompression = 1;
|
---|
| 399 | ao->neg_endpoint = 1;
|
---|
| 400 | }
|
---|
| 401 |
|
---|
| 402 |
|
---|
| 403 | /*
|
---|
| 404 | * lcp_open - LCP is allowed to come up.
|
---|
| 405 | */
|
---|
| 406 | void lcp_open(ppp_pcb *pcb) {
|
---|
| 407 | fsm *f = &pcb->lcp_fsm;
|
---|
| 408 | lcp_options *wo = &pcb->lcp_wantoptions;
|
---|
| 409 |
|
---|
| 410 | f->flags &= ~(OPT_PASSIVE | OPT_SILENT);
|
---|
| 411 | if (wo->passive)
|
---|
| 412 | f->flags |= OPT_PASSIVE;
|
---|
| 413 | if (wo->silent)
|
---|
| 414 | f->flags |= OPT_SILENT;
|
---|
| 415 | fsm_open(f);
|
---|
| 416 | }
|
---|
| 417 |
|
---|
| 418 |
|
---|
| 419 | /*
|
---|
| 420 | * lcp_close - Take LCP down.
|
---|
| 421 | */
|
---|
| 422 | void lcp_close(ppp_pcb *pcb, const char *reason) {
|
---|
| 423 | fsm *f = &pcb->lcp_fsm;
|
---|
| 424 | int oldstate;
|
---|
| 425 |
|
---|
| 426 | if (pcb->phase != PPP_PHASE_DEAD
|
---|
| 427 | #ifdef HAVE_MULTILINK
|
---|
| 428 | && pcb->phase != PPP_PHASE_MASTER
|
---|
| 429 | #endif /* HAVE_MULTILINK */
|
---|
| 430 | )
|
---|
| 431 | new_phase(pcb, PPP_PHASE_TERMINATE);
|
---|
| 432 |
|
---|
| 433 | if (f->flags & DELAYED_UP) {
|
---|
| 434 | UNTIMEOUT(lcp_delayed_up, f);
|
---|
| 435 | f->state = PPP_FSM_STOPPED;
|
---|
| 436 | }
|
---|
| 437 | oldstate = f->state;
|
---|
| 438 |
|
---|
| 439 | fsm_close(f, reason);
|
---|
| 440 | if (oldstate == PPP_FSM_STOPPED && (f->flags & (OPT_PASSIVE|OPT_SILENT|DELAYED_UP))) {
|
---|
| 441 | /*
|
---|
| 442 | * This action is not strictly according to the FSM in RFC1548,
|
---|
| 443 | * but it does mean that the program terminates if you do a
|
---|
| 444 | * lcp_close() when a connection hasn't been established
|
---|
| 445 | * because we are in passive/silent mode or because we have
|
---|
| 446 | * delayed the fsm_lowerup() call and it hasn't happened yet.
|
---|
| 447 | */
|
---|
| 448 | f->flags &= ~DELAYED_UP;
|
---|
| 449 | lcp_finished(f);
|
---|
| 450 | }
|
---|
| 451 | }
|
---|
| 452 |
|
---|
| 453 |
|
---|
| 454 | /*
|
---|
| 455 | * lcp_lowerup - The lower layer is up.
|
---|
| 456 | */
|
---|
| 457 | void lcp_lowerup(ppp_pcb *pcb) {
|
---|
| 458 | lcp_options *wo = &pcb->lcp_wantoptions;
|
---|
| 459 | fsm *f = &pcb->lcp_fsm;
|
---|
| 460 | /*
|
---|
| 461 | * Don't use A/C or protocol compression on transmission,
|
---|
| 462 | * but accept A/C and protocol compressed packets
|
---|
| 463 | * if we are going to ask for A/C and protocol compression.
|
---|
| 464 | */
|
---|
| 465 | if (ppp_send_config(pcb, PPP_MRU, 0xffffffff, 0, 0) < 0
|
---|
| 466 | || ppp_recv_config(pcb, PPP_MRU, (pcb->settings.lax_recv? 0: 0xffffffff),
|
---|
| 467 | wo->neg_pcompression, wo->neg_accompression) < 0)
|
---|
| 468 | return;
|
---|
| 469 | pcb->peer_mru = PPP_MRU;
|
---|
| 470 |
|
---|
| 471 | if (pcb->settings.listen_time != 0) {
|
---|
| 472 | f->flags |= DELAYED_UP;
|
---|
| 473 | TIMEOUTMS(lcp_delayed_up, f, pcb->settings.listen_time);
|
---|
| 474 | } else
|
---|
| 475 | fsm_lowerup(f);
|
---|
| 476 | }
|
---|
| 477 |
|
---|
| 478 |
|
---|
| 479 | /*
|
---|
| 480 | * lcp_lowerdown - The lower layer is down.
|
---|
| 481 | */
|
---|
| 482 | void lcp_lowerdown(ppp_pcb *pcb) {
|
---|
| 483 | fsm *f = &pcb->lcp_fsm;
|
---|
| 484 |
|
---|
| 485 | if (f->flags & DELAYED_UP) {
|
---|
| 486 | f->flags &= ~DELAYED_UP;
|
---|
| 487 | UNTIMEOUT(lcp_delayed_up, f);
|
---|
| 488 | } else
|
---|
| 489 | fsm_lowerdown(f);
|
---|
| 490 | }
|
---|
| 491 |
|
---|
| 492 |
|
---|
| 493 | /*
|
---|
| 494 | * lcp_delayed_up - Bring the lower layer up now.
|
---|
| 495 | */
|
---|
| 496 | static void lcp_delayed_up(void *arg) {
|
---|
| 497 | fsm *f = (fsm*)arg;
|
---|
| 498 |
|
---|
| 499 | if (f->flags & DELAYED_UP) {
|
---|
| 500 | f->flags &= ~DELAYED_UP;
|
---|
| 501 | fsm_lowerup(f);
|
---|
| 502 | }
|
---|
| 503 | }
|
---|
| 504 |
|
---|
| 505 |
|
---|
| 506 | /*
|
---|
| 507 | * lcp_input - Input LCP packet.
|
---|
| 508 | */
|
---|
| 509 | static void lcp_input(ppp_pcb *pcb, u_char *p, int len) {
|
---|
| 510 | fsm *f = &pcb->lcp_fsm;
|
---|
| 511 |
|
---|
| 512 | if (f->flags & DELAYED_UP) {
|
---|
| 513 | f->flags &= ~DELAYED_UP;
|
---|
| 514 | UNTIMEOUT(lcp_delayed_up, f);
|
---|
| 515 | fsm_lowerup(f);
|
---|
| 516 | }
|
---|
| 517 | fsm_input(f, p, len);
|
---|
| 518 | }
|
---|
| 519 |
|
---|
| 520 | /*
|
---|
| 521 | * lcp_extcode - Handle a LCP-specific code.
|
---|
| 522 | */
|
---|
| 523 | static int lcp_extcode(fsm *f, int code, int id, u_char *inp, int len) {
|
---|
| 524 | ppp_pcb *pcb = f->pcb;
|
---|
| 525 | lcp_options *go = &pcb->lcp_gotoptions;
|
---|
| 526 | u_char *magp;
|
---|
| 527 |
|
---|
| 528 | switch( code ){
|
---|
| 529 | case PROTREJ:
|
---|
| 530 | lcp_rprotrej(f, inp, len);
|
---|
| 531 | break;
|
---|
| 532 |
|
---|
| 533 | case ECHOREQ:
|
---|
| 534 | if (f->state != PPP_FSM_OPENED)
|
---|
| 535 | break;
|
---|
| 536 | magp = inp;
|
---|
| 537 | PUTLONG(go->magicnumber, magp);
|
---|
| 538 | fsm_sdata(f, ECHOREP, id, inp, len);
|
---|
| 539 | break;
|
---|
| 540 |
|
---|
| 541 | case ECHOREP:
|
---|
| 542 | lcp_received_echo_reply(f, id, inp, len);
|
---|
| 543 | break;
|
---|
| 544 |
|
---|
| 545 | case DISCREQ:
|
---|
| 546 | case IDENTIF:
|
---|
| 547 | case TIMEREM:
|
---|
| 548 | break;
|
---|
| 549 |
|
---|
| 550 | default:
|
---|
| 551 | return 0;
|
---|
| 552 | }
|
---|
| 553 | return 1;
|
---|
| 554 | }
|
---|
| 555 |
|
---|
| 556 |
|
---|
| 557 | /*
|
---|
| 558 | * lcp_rprotrej - Receive an Protocol-Reject.
|
---|
| 559 | *
|
---|
| 560 | * Figure out which protocol is rejected and inform it.
|
---|
| 561 | */
|
---|
| 562 | static void lcp_rprotrej(fsm *f, u_char *inp, int len) {
|
---|
| 563 | int i;
|
---|
| 564 | const struct protent *protp;
|
---|
| 565 | u_short prot;
|
---|
| 566 | #if PPP_PROTOCOLNAME
|
---|
| 567 | const char *pname;
|
---|
| 568 | #endif /* PPP_PROTOCOLNAME */
|
---|
| 569 |
|
---|
| 570 | if (len < 2) {
|
---|
| 571 | LCPDEBUG(("lcp_rprotrej: Rcvd short Protocol-Reject packet!"));
|
---|
| 572 | return;
|
---|
| 573 | }
|
---|
| 574 |
|
---|
| 575 | GETSHORT(prot, inp);
|
---|
| 576 |
|
---|
| 577 | /*
|
---|
| 578 | * Protocol-Reject packets received in any state other than the LCP
|
---|
| 579 | * OPENED state SHOULD be silently discarded.
|
---|
| 580 | */
|
---|
| 581 | if( f->state != PPP_FSM_OPENED ){
|
---|
| 582 | LCPDEBUG(("Protocol-Reject discarded: LCP in state %d", f->state));
|
---|
| 583 | return;
|
---|
| 584 | }
|
---|
| 585 |
|
---|
| 586 | #if PPP_PROTOCOLNAME
|
---|
| 587 | pname = protocol_name(prot);
|
---|
| 588 | #endif /* PPP_PROTOCOLNAME */
|
---|
| 589 |
|
---|
| 590 | /*
|
---|
| 591 | * Upcall the proper Protocol-Reject routine.
|
---|
| 592 | */
|
---|
| 593 | for (i = 0; (protp = protocols[i]) != NULL; ++i)
|
---|
| 594 | if (protp->protocol == prot) {
|
---|
| 595 | #if PPP_PROTOCOLNAME
|
---|
| 596 | if (pname != NULL)
|
---|
| 597 | ppp_dbglog("Protocol-Reject for '%s' (0x%x) received", pname,
|
---|
| 598 | prot);
|
---|
| 599 | else
|
---|
| 600 | #endif /* PPP_PROTOCOLNAME */
|
---|
| 601 | ppp_dbglog("Protocol-Reject for 0x%x received", prot);
|
---|
| 602 | (*protp->protrej)(f->pcb);
|
---|
| 603 | return;
|
---|
| 604 | }
|
---|
| 605 |
|
---|
| 606 | #if PPP_PROTOCOLNAME
|
---|
| 607 | if (pname != NULL)
|
---|
| 608 | ppp_warn("Protocol-Reject for unsupported protocol '%s' (0x%x)", pname,
|
---|
| 609 | prot);
|
---|
| 610 | else
|
---|
| 611 | #endif /* #if PPP_PROTOCOLNAME */
|
---|
| 612 | ppp_warn("Protocol-Reject for unsupported protocol 0x%x", prot);
|
---|
| 613 | }
|
---|
| 614 |
|
---|
| 615 |
|
---|
| 616 | /*
|
---|
| 617 | * lcp_protrej - A Protocol-Reject was received.
|
---|
| 618 | */
|
---|
| 619 | /*ARGSUSED*/
|
---|
| 620 | static void lcp_protrej(ppp_pcb *pcb) {
|
---|
| 621 | /*
|
---|
| 622 | * Can't reject LCP!
|
---|
| 623 | */
|
---|
| 624 | ppp_error("Received Protocol-Reject for LCP!");
|
---|
| 625 | fsm_protreject(&pcb->lcp_fsm);
|
---|
| 626 | }
|
---|
| 627 |
|
---|
| 628 |
|
---|
| 629 | /*
|
---|
| 630 | * lcp_sprotrej - Send a Protocol-Reject for some protocol.
|
---|
| 631 | */
|
---|
| 632 | void lcp_sprotrej(ppp_pcb *pcb, u_char *p, int len) {
|
---|
| 633 | fsm *f = &pcb->lcp_fsm;
|
---|
| 634 | /*
|
---|
| 635 | * Send back the protocol and the information field of the
|
---|
| 636 | * rejected packet. We only get here if LCP is in the OPENED state.
|
---|
| 637 | */
|
---|
| 638 | #if 0
|
---|
| 639 | p += 2;
|
---|
| 640 | len -= 2;
|
---|
| 641 | #endif
|
---|
| 642 |
|
---|
| 643 | fsm_sdata(f, PROTREJ, ++f->id,
|
---|
| 644 | p, len);
|
---|
| 645 | }
|
---|
| 646 |
|
---|
| 647 |
|
---|
| 648 | /*
|
---|
| 649 | * lcp_resetci - Reset our CI.
|
---|
| 650 | */
|
---|
| 651 | static void lcp_resetci(fsm *f) {
|
---|
| 652 | ppp_pcb *pcb = f->pcb;
|
---|
| 653 | lcp_options *wo = &pcb->lcp_wantoptions;
|
---|
| 654 | lcp_options *go = &pcb->lcp_gotoptions;
|
---|
| 655 | lcp_options *ao = &pcb->lcp_allowoptions;
|
---|
| 656 |
|
---|
| 657 | #if PPP_AUTH_SUPPORT
|
---|
| 658 |
|
---|
| 659 | /* note: default value is true for allow options */
|
---|
| 660 | if (pcb->settings.user && pcb->settings.passwd) {
|
---|
| 661 | #if PAP_SUPPORT
|
---|
| 662 | if (pcb->settings.refuse_pap) {
|
---|
| 663 | ao->neg_upap = 0;
|
---|
| 664 | }
|
---|
| 665 | #endif /* PAP_SUPPORT */
|
---|
| 666 | #if CHAP_SUPPORT
|
---|
| 667 | if (pcb->settings.refuse_chap) {
|
---|
| 668 | ao->chap_mdtype &= ~MDTYPE_MD5;
|
---|
| 669 | }
|
---|
| 670 | #if MSCHAP_SUPPORT
|
---|
| 671 | if (pcb->settings.refuse_mschap) {
|
---|
| 672 | ao->chap_mdtype &= ~MDTYPE_MICROSOFT;
|
---|
| 673 | }
|
---|
| 674 | if (pcb->settings.refuse_mschap_v2) {
|
---|
| 675 | ao->chap_mdtype &= ~MDTYPE_MICROSOFT_V2;
|
---|
| 676 | }
|
---|
| 677 | #endif /* MSCHAP_SUPPORT */
|
---|
| 678 | ao->neg_chap = (ao->chap_mdtype != MDTYPE_NONE);
|
---|
| 679 | #endif /* CHAP_SUPPORT */
|
---|
| 680 | #if EAP_SUPPORT
|
---|
| 681 | if (pcb->settings.refuse_eap) {
|
---|
| 682 | ao->neg_eap = 0;
|
---|
| 683 | }
|
---|
| 684 | #endif /* EAP_SUPPORT */
|
---|
| 685 |
|
---|
| 686 | #if PPP_SERVER
|
---|
| 687 | /* note: default value is false for wanted options */
|
---|
| 688 | if (pcb->settings.auth_required) {
|
---|
| 689 | #if PAP_SUPPORT
|
---|
| 690 | if (!pcb->settings.refuse_pap) {
|
---|
| 691 | wo->neg_upap = 1;
|
---|
| 692 | }
|
---|
| 693 | #endif /* PAP_SUPPORT */
|
---|
| 694 | #if CHAP_SUPPORT
|
---|
| 695 | if (!pcb->settings.refuse_chap) {
|
---|
| 696 | wo->chap_mdtype |= MDTYPE_MD5;
|
---|
| 697 | }
|
---|
| 698 | #if MSCHAP_SUPPORT
|
---|
| 699 | if (!pcb->settings.refuse_mschap) {
|
---|
| 700 | wo->chap_mdtype |= MDTYPE_MICROSOFT;
|
---|
| 701 | }
|
---|
| 702 | if (!pcb->settings.refuse_mschap_v2) {
|
---|
| 703 | wo->chap_mdtype |= MDTYPE_MICROSOFT_V2;
|
---|
| 704 | }
|
---|
| 705 | #endif /* MSCHAP_SUPPORT */
|
---|
| 706 | wo->neg_chap = (wo->chap_mdtype != MDTYPE_NONE);
|
---|
| 707 | #endif /* CHAP_SUPPORT */
|
---|
| 708 | #if EAP_SUPPORT
|
---|
| 709 | if (!pcb->settings.refuse_eap) {
|
---|
| 710 | wo->neg_eap = 1;
|
---|
| 711 | }
|
---|
| 712 | #endif /* EAP_SUPPORT */
|
---|
| 713 | }
|
---|
| 714 | #endif /* PPP_SERVER */
|
---|
| 715 |
|
---|
| 716 | } else {
|
---|
| 717 | #if PAP_SUPPORT
|
---|
| 718 | ao->neg_upap = 0;
|
---|
| 719 | #endif /* PAP_SUPPORT */
|
---|
| 720 | #if CHAP_SUPPORT
|
---|
| 721 | ao->neg_chap = 0;
|
---|
| 722 | ao->chap_mdtype = MDTYPE_NONE;
|
---|
| 723 | #endif /* CHAP_SUPPORT */
|
---|
| 724 | #if EAP_SUPPORT
|
---|
| 725 | ao->neg_eap = 0;
|
---|
| 726 | #endif /* EAP_SUPPORT */
|
---|
| 727 | }
|
---|
| 728 |
|
---|
| 729 | PPPDEBUG(LOG_DEBUG, ("ppp: auth protocols:"));
|
---|
| 730 | #if PAP_SUPPORT
|
---|
| 731 | PPPDEBUG(LOG_DEBUG, (" PAP=%d", ao->neg_upap));
|
---|
| 732 | #endif /* PAP_SUPPORT */
|
---|
| 733 | #if CHAP_SUPPORT
|
---|
| 734 | PPPDEBUG(LOG_DEBUG, (" CHAP=%d CHAP_MD5=%d", ao->neg_chap, !!(ao->chap_mdtype&MDTYPE_MD5)));
|
---|
| 735 | #if MSCHAP_SUPPORT
|
---|
| 736 | PPPDEBUG(LOG_DEBUG, (" CHAP_MS=%d CHAP_MS2=%d", !!(ao->chap_mdtype&MDTYPE_MICROSOFT), !!(ao->chap_mdtype&MDTYPE_MICROSOFT_V2)));
|
---|
| 737 | #endif /* MSCHAP_SUPPORT */
|
---|
| 738 | #endif /* CHAP_SUPPORT */
|
---|
| 739 | #if EAP_SUPPORT
|
---|
| 740 | PPPDEBUG(LOG_DEBUG, (" EAP=%d", ao->neg_eap));
|
---|
| 741 | #endif /* EAP_SUPPORT */
|
---|
| 742 | PPPDEBUG(LOG_DEBUG, ("\n"));
|
---|
| 743 |
|
---|
| 744 | #endif /* PPP_AUTH_SUPPORT */
|
---|
| 745 |
|
---|
| 746 | wo->magicnumber = magic();
|
---|
| 747 | wo->numloops = 0;
|
---|
| 748 | *go = *wo;
|
---|
| 749 | #ifdef HAVE_MULTILINK
|
---|
| 750 | if (!multilink) {
|
---|
| 751 | go->neg_mrru = 0;
|
---|
| 752 | #endif /* HAVE_MULTILINK */
|
---|
| 753 | go->neg_ssnhf = 0;
|
---|
| 754 | go->neg_endpoint = 0;
|
---|
| 755 | #ifdef HAVE_MULTILINK
|
---|
| 756 | }
|
---|
| 757 | #endif /* HAVE_MULTILINK */
|
---|
| 758 | if (pcb->settings.noendpoint)
|
---|
| 759 | ao->neg_endpoint = 0;
|
---|
| 760 | pcb->peer_mru = PPP_MRU;
|
---|
| 761 | #if 0 /* UNUSED */
|
---|
| 762 | auth_reset(pcb);
|
---|
| 763 | #endif /* UNUSED */
|
---|
| 764 | }
|
---|
| 765 |
|
---|
| 766 |
|
---|
| 767 | /*
|
---|
| 768 | * lcp_cilen - Return length of our CI.
|
---|
| 769 | */
|
---|
| 770 | static int lcp_cilen(fsm *f) {
|
---|
| 771 | ppp_pcb *pcb = f->pcb;
|
---|
| 772 | lcp_options *go = &pcb->lcp_gotoptions;
|
---|
| 773 |
|
---|
| 774 | #define LENCIVOID(neg) ((neg) ? CILEN_VOID : 0)
|
---|
| 775 | #if CHAP_SUPPORT
|
---|
| 776 | #define LENCICHAP(neg) ((neg) ? CILEN_CHAP : 0)
|
---|
| 777 | #endif /* CHAP_SUPPORT */
|
---|
| 778 | #define LENCISHORT(neg) ((neg) ? CILEN_SHORT : 0)
|
---|
| 779 | #define LENCILONG(neg) ((neg) ? CILEN_LONG : 0)
|
---|
| 780 | #if LQR_SUPPORT
|
---|
| 781 | #define LENCILQR(neg) ((neg) ? CILEN_LQR: 0)
|
---|
| 782 | #endif /* LQR_SUPPORT */
|
---|
| 783 | #define LENCICBCP(neg) ((neg) ? CILEN_CBCP: 0)
|
---|
| 784 | /*
|
---|
| 785 | * NB: we only ask for one of CHAP, UPAP, or EAP, even if we will
|
---|
| 786 | * accept more than one. We prefer EAP first, then CHAP, then
|
---|
| 787 | * PAP.
|
---|
| 788 | */
|
---|
| 789 | return (LENCISHORT(go->neg_mru && go->mru != PPP_DEFMRU) +
|
---|
| 790 | LENCILONG(go->neg_asyncmap && go->asyncmap != 0xFFFFFFFF) +
|
---|
| 791 | #if EAP_SUPPORT
|
---|
| 792 | LENCISHORT(go->neg_eap) +
|
---|
| 793 | #endif /* EAP_SUPPORT */
|
---|
| 794 | #if CHAP_SUPPORT /* cannot be improved, embedding a directive within macro arguments is not portable */
|
---|
| 795 | #if EAP_SUPPORT
|
---|
| 796 | LENCICHAP(!go->neg_eap && go->neg_chap) +
|
---|
| 797 | #endif /* EAP_SUPPORT */
|
---|
| 798 | #if !EAP_SUPPORT
|
---|
| 799 | LENCICHAP(go->neg_chap) +
|
---|
| 800 | #endif /* !EAP_SUPPORT */
|
---|
| 801 | #endif /* CHAP_SUPPORT */
|
---|
| 802 | #if PAP_SUPPORT /* cannot be improved, embedding a directive within macro arguments is not portable */
|
---|
| 803 | #if EAP_SUPPORT && CHAP_SUPPORT
|
---|
| 804 | LENCISHORT(!go->neg_eap && !go->neg_chap && go->neg_upap) +
|
---|
| 805 | #endif /* EAP_SUPPORT && CHAP_SUPPORT */
|
---|
| 806 | #if EAP_SUPPORT && !CHAP_SUPPORT
|
---|
| 807 | LENCISHORT(!go->neg_eap && go->neg_upap) +
|
---|
| 808 | #endif /* EAP_SUPPORT && !CHAP_SUPPORT */
|
---|
| 809 | #if !EAP_SUPPORT && CHAP_SUPPORT
|
---|
| 810 | LENCISHORT(!go->neg_chap && go->neg_upap) +
|
---|
| 811 | #endif /* !EAP_SUPPORT && CHAP_SUPPORT */
|
---|
| 812 | #if !EAP_SUPPORT && !CHAP_SUPPORT
|
---|
| 813 | LENCISHORT(go->neg_upap) +
|
---|
| 814 | #endif /* !EAP_SUPPORT && !CHAP_SUPPORT */
|
---|
| 815 | #endif /* PAP_SUPPORT */
|
---|
| 816 | #if LQR_SUPPORT
|
---|
| 817 | LENCILQR(go->neg_lqr) +
|
---|
| 818 | #endif /* LQR_SUPPORT */
|
---|
| 819 | LENCICBCP(go->neg_cbcp) +
|
---|
| 820 | LENCILONG(go->neg_magicnumber) +
|
---|
| 821 | LENCIVOID(go->neg_pcompression) +
|
---|
| 822 | LENCIVOID(go->neg_accompression) +
|
---|
| 823 | #ifdef HAVE_MULTILINK
|
---|
| 824 | LENCISHORT(go->neg_mrru) +
|
---|
| 825 | #endif /* HAVE_MULTILINK */
|
---|
| 826 | LENCIVOID(go->neg_ssnhf) +
|
---|
| 827 | (go->neg_endpoint? CILEN_CHAR + go->endpoint.length: 0));
|
---|
| 828 | }
|
---|
| 829 |
|
---|
| 830 |
|
---|
| 831 | /*
|
---|
| 832 | * lcp_addci - Add our desired CIs to a packet.
|
---|
| 833 | */
|
---|
| 834 | static void lcp_addci(fsm *f, u_char *ucp, int *lenp) {
|
---|
| 835 | ppp_pcb *pcb = f->pcb;
|
---|
| 836 | lcp_options *go = &pcb->lcp_gotoptions;
|
---|
| 837 | u_char *start_ucp = ucp;
|
---|
| 838 |
|
---|
| 839 | #define ADDCIVOID(opt, neg) \
|
---|
| 840 | if (neg) { \
|
---|
| 841 | PUTCHAR(opt, ucp); \
|
---|
| 842 | PUTCHAR(CILEN_VOID, ucp); \
|
---|
| 843 | }
|
---|
| 844 | #define ADDCISHORT(opt, neg, val) \
|
---|
| 845 | if (neg) { \
|
---|
| 846 | PUTCHAR(opt, ucp); \
|
---|
| 847 | PUTCHAR(CILEN_SHORT, ucp); \
|
---|
| 848 | PUTSHORT(val, ucp); \
|
---|
| 849 | }
|
---|
| 850 | #if CHAP_SUPPORT
|
---|
| 851 | #define ADDCICHAP(opt, neg, val) \
|
---|
| 852 | if (neg) { \
|
---|
| 853 | PUTCHAR((opt), ucp); \
|
---|
| 854 | PUTCHAR(CILEN_CHAP, ucp); \
|
---|
| 855 | PUTSHORT(PPP_CHAP, ucp); \
|
---|
| 856 | PUTCHAR((CHAP_DIGEST(val)), ucp); \
|
---|
| 857 | }
|
---|
| 858 | #endif /* CHAP_SUPPORT */
|
---|
| 859 | #define ADDCILONG(opt, neg, val) \
|
---|
| 860 | if (neg) { \
|
---|
| 861 | PUTCHAR(opt, ucp); \
|
---|
| 862 | PUTCHAR(CILEN_LONG, ucp); \
|
---|
| 863 | PUTLONG(val, ucp); \
|
---|
| 864 | }
|
---|
| 865 | #if LQR_SUPPORT
|
---|
| 866 | #define ADDCILQR(opt, neg, val) \
|
---|
| 867 | if (neg) { \
|
---|
| 868 | PUTCHAR(opt, ucp); \
|
---|
| 869 | PUTCHAR(CILEN_LQR, ucp); \
|
---|
| 870 | PUTSHORT(PPP_LQR, ucp); \
|
---|
| 871 | PUTLONG(val, ucp); \
|
---|
| 872 | }
|
---|
| 873 | #endif /* LQR_SUPPORT */
|
---|
| 874 | #define ADDCICHAR(opt, neg, val) \
|
---|
| 875 | if (neg) { \
|
---|
| 876 | PUTCHAR(opt, ucp); \
|
---|
| 877 | PUTCHAR(CILEN_CHAR, ucp); \
|
---|
| 878 | PUTCHAR(val, ucp); \
|
---|
| 879 | }
|
---|
| 880 | #define ADDCIENDP(opt, neg, class, val, len) \
|
---|
| 881 | if (neg) { \
|
---|
| 882 | int i; \
|
---|
| 883 | PUTCHAR(opt, ucp); \
|
---|
| 884 | PUTCHAR(CILEN_CHAR + len, ucp); \
|
---|
| 885 | PUTCHAR(class, ucp); \
|
---|
| 886 | for (i = 0; i < len; ++i) \
|
---|
| 887 | PUTCHAR(val[i], ucp); \
|
---|
| 888 | }
|
---|
| 889 |
|
---|
| 890 | ADDCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
|
---|
| 891 | ADDCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFF,
|
---|
| 892 | go->asyncmap);
|
---|
| 893 | #if EAP_SUPPORT
|
---|
| 894 | ADDCISHORT(CI_AUTHTYPE, go->neg_eap, PPP_EAP);
|
---|
| 895 | #endif /* EAP_SUPPORT */
|
---|
| 896 | #if CHAP_SUPPORT /* cannot be improved, embedding a directive within macro arguments is not portable */
|
---|
| 897 | #if EAP_SUPPORT
|
---|
| 898 | ADDCICHAP(CI_AUTHTYPE, !go->neg_eap && go->neg_chap, go->chap_mdtype);
|
---|
| 899 | #endif /* EAP_SUPPORT */
|
---|
| 900 | #if !EAP_SUPPORT
|
---|
| 901 | ADDCICHAP(CI_AUTHTYPE, go->neg_chap, go->chap_mdtype);
|
---|
| 902 | #endif /* !EAP_SUPPORT */
|
---|
| 903 | #endif /* CHAP_SUPPORT */
|
---|
| 904 | #if PAP_SUPPORT /* cannot be improved, embedding a directive within macro arguments is not portable */
|
---|
| 905 | #if EAP_SUPPORT && CHAP_SUPPORT
|
---|
| 906 | ADDCISHORT(CI_AUTHTYPE, !go->neg_eap && !go->neg_chap && go->neg_upap, PPP_PAP);
|
---|
| 907 | #endif /* EAP_SUPPORT && CHAP_SUPPORT */
|
---|
| 908 | #if EAP_SUPPORT && !CHAP_SUPPORT
|
---|
| 909 | ADDCISHORT(CI_AUTHTYPE, !go->neg_eap && go->neg_upap, PPP_PAP);
|
---|
| 910 | #endif /* EAP_SUPPORT && !CHAP_SUPPORT */
|
---|
| 911 | #if !EAP_SUPPORT && CHAP_SUPPORT
|
---|
| 912 | ADDCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
|
---|
| 913 | #endif /* !EAP_SUPPORT && CHAP_SUPPORT */
|
---|
| 914 | #if !EAP_SUPPORT && !CHAP_SUPPORT
|
---|
| 915 | ADDCISHORT(CI_AUTHTYPE, go->neg_upap, PPP_PAP);
|
---|
| 916 | #endif /* !EAP_SUPPORT && !CHAP_SUPPORT */
|
---|
| 917 | #endif /* PAP_SUPPORT */
|
---|
| 918 | #if LQR_SUPPORT
|
---|
| 919 | ADDCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
|
---|
| 920 | #endif /* LQR_SUPPORT */
|
---|
| 921 | ADDCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
|
---|
| 922 | ADDCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
|
---|
| 923 | ADDCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
|
---|
| 924 | ADDCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
|
---|
| 925 | #ifdef HAVE_MULTILINK
|
---|
| 926 | ADDCISHORT(CI_MRRU, go->neg_mrru, go->mrru);
|
---|
| 927 | #endif
|
---|
| 928 | ADDCIVOID(CI_SSNHF, go->neg_ssnhf);
|
---|
| 929 | ADDCIENDP(CI_EPDISC, go->neg_endpoint, go->endpoint.class_,
|
---|
| 930 | go->endpoint.value, go->endpoint.length);
|
---|
| 931 |
|
---|
| 932 | if (ucp - start_ucp != *lenp) {
|
---|
| 933 | /* this should never happen, because peer_mtu should be 1500 */
|
---|
| 934 | ppp_error("Bug in lcp_addci: wrong length");
|
---|
| 935 | }
|
---|
| 936 | }
|
---|
| 937 |
|
---|
| 938 |
|
---|
| 939 | /*
|
---|
| 940 | * lcp_ackci - Ack our CIs.
|
---|
| 941 | * This should not modify any state if the Ack is bad.
|
---|
| 942 | *
|
---|
| 943 | * Returns:
|
---|
| 944 | * 0 - Ack was bad.
|
---|
| 945 | * 1 - Ack was good.
|
---|
| 946 | */
|
---|
| 947 | static int lcp_ackci(fsm *f, u_char *p, int len) {
|
---|
| 948 | ppp_pcb *pcb = f->pcb;
|
---|
| 949 | lcp_options *go = &pcb->lcp_gotoptions;
|
---|
| 950 | u_char cilen, citype, cichar;
|
---|
| 951 | u_short cishort;
|
---|
| 952 | u32_t cilong;
|
---|
| 953 |
|
---|
| 954 | /*
|
---|
| 955 | * CIs must be in exactly the same order that we sent.
|
---|
| 956 | * Check packet length and CI length at each step.
|
---|
| 957 | * If we find any deviations, then this packet is bad.
|
---|
| 958 | */
|
---|
| 959 | #define ACKCIVOID(opt, neg) \
|
---|
| 960 | if (neg) { \
|
---|
| 961 | if ((len -= CILEN_VOID) < 0) \
|
---|
| 962 | goto bad; \
|
---|
| 963 | GETCHAR(citype, p); \
|
---|
| 964 | GETCHAR(cilen, p); \
|
---|
| 965 | if (cilen != CILEN_VOID || \
|
---|
| 966 | citype != opt) \
|
---|
| 967 | goto bad; \
|
---|
| 968 | }
|
---|
| 969 | #define ACKCISHORT(opt, neg, val) \
|
---|
| 970 | if (neg) { \
|
---|
| 971 | if ((len -= CILEN_SHORT) < 0) \
|
---|
| 972 | goto bad; \
|
---|
| 973 | GETCHAR(citype, p); \
|
---|
| 974 | GETCHAR(cilen, p); \
|
---|
| 975 | if (cilen != CILEN_SHORT || \
|
---|
| 976 | citype != opt) \
|
---|
| 977 | goto bad; \
|
---|
| 978 | GETSHORT(cishort, p); \
|
---|
| 979 | if (cishort != val) \
|
---|
| 980 | goto bad; \
|
---|
| 981 | }
|
---|
| 982 | #define ACKCICHAR(opt, neg, val) \
|
---|
| 983 | if (neg) { \
|
---|
| 984 | if ((len -= CILEN_CHAR) < 0) \
|
---|
| 985 | goto bad; \
|
---|
| 986 | GETCHAR(citype, p); \
|
---|
| 987 | GETCHAR(cilen, p); \
|
---|
| 988 | if (cilen != CILEN_CHAR || \
|
---|
| 989 | citype != opt) \
|
---|
| 990 | goto bad; \
|
---|
| 991 | GETCHAR(cichar, p); \
|
---|
| 992 | if (cichar != val) \
|
---|
| 993 | goto bad; \
|
---|
| 994 | }
|
---|
| 995 | #if CHAP_SUPPORT
|
---|
| 996 | #define ACKCICHAP(opt, neg, val) \
|
---|
| 997 | if (neg) { \
|
---|
| 998 | if ((len -= CILEN_CHAP) < 0) \
|
---|
| 999 | goto bad; \
|
---|
| 1000 | GETCHAR(citype, p); \
|
---|
| 1001 | GETCHAR(cilen, p); \
|
---|
| 1002 | if (cilen != CILEN_CHAP || \
|
---|
| 1003 | citype != (opt)) \
|
---|
| 1004 | goto bad; \
|
---|
| 1005 | GETSHORT(cishort, p); \
|
---|
| 1006 | if (cishort != PPP_CHAP) \
|
---|
| 1007 | goto bad; \
|
---|
| 1008 | GETCHAR(cichar, p); \
|
---|
| 1009 | if (cichar != (CHAP_DIGEST(val))) \
|
---|
| 1010 | goto bad; \
|
---|
| 1011 | }
|
---|
| 1012 | #endif /* CHAP_SUPPORT */
|
---|
| 1013 | #define ACKCILONG(opt, neg, val) \
|
---|
| 1014 | if (neg) { \
|
---|
| 1015 | if ((len -= CILEN_LONG) < 0) \
|
---|
| 1016 | goto bad; \
|
---|
| 1017 | GETCHAR(citype, p); \
|
---|
| 1018 | GETCHAR(cilen, p); \
|
---|
| 1019 | if (cilen != CILEN_LONG || \
|
---|
| 1020 | citype != opt) \
|
---|
| 1021 | goto bad; \
|
---|
| 1022 | GETLONG(cilong, p); \
|
---|
| 1023 | if (cilong != val) \
|
---|
| 1024 | goto bad; \
|
---|
| 1025 | }
|
---|
| 1026 | #if LQR_SUPPORT
|
---|
| 1027 | #define ACKCILQR(opt, neg, val) \
|
---|
| 1028 | if (neg) { \
|
---|
| 1029 | if ((len -= CILEN_LQR) < 0) \
|
---|
| 1030 | goto bad; \
|
---|
| 1031 | GETCHAR(citype, p); \
|
---|
| 1032 | GETCHAR(cilen, p); \
|
---|
| 1033 | if (cilen != CILEN_LQR || \
|
---|
| 1034 | citype != opt) \
|
---|
| 1035 | goto bad; \
|
---|
| 1036 | GETSHORT(cishort, p); \
|
---|
| 1037 | if (cishort != PPP_LQR) \
|
---|
| 1038 | goto bad; \
|
---|
| 1039 | GETLONG(cilong, p); \
|
---|
| 1040 | if (cilong != val) \
|
---|
| 1041 | goto bad; \
|
---|
| 1042 | }
|
---|
| 1043 | #endif /* LQR_SUPPORT */
|
---|
| 1044 | #define ACKCIENDP(opt, neg, class, val, vlen) \
|
---|
| 1045 | if (neg) { \
|
---|
| 1046 | int i; \
|
---|
| 1047 | if ((len -= CILEN_CHAR + vlen) < 0) \
|
---|
| 1048 | goto bad; \
|
---|
| 1049 | GETCHAR(citype, p); \
|
---|
| 1050 | GETCHAR(cilen, p); \
|
---|
| 1051 | if (cilen != CILEN_CHAR + vlen || \
|
---|
| 1052 | citype != opt) \
|
---|
| 1053 | goto bad; \
|
---|
| 1054 | GETCHAR(cichar, p); \
|
---|
| 1055 | if (cichar != class) \
|
---|
| 1056 | goto bad; \
|
---|
| 1057 | for (i = 0; i < vlen; ++i) { \
|
---|
| 1058 | GETCHAR(cichar, p); \
|
---|
| 1059 | if (cichar != val[i]) \
|
---|
| 1060 | goto bad; \
|
---|
| 1061 | } \
|
---|
| 1062 | }
|
---|
| 1063 |
|
---|
| 1064 | ACKCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
|
---|
| 1065 | ACKCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFF,
|
---|
| 1066 | go->asyncmap);
|
---|
| 1067 | #if EAP_SUPPORT
|
---|
| 1068 | ACKCISHORT(CI_AUTHTYPE, go->neg_eap, PPP_EAP);
|
---|
| 1069 | #endif /* EAP_SUPPORT */
|
---|
| 1070 | #if CHAP_SUPPORT /* cannot be improved, embedding a directive within macro arguments is not portable */
|
---|
| 1071 | #if EAP_SUPPORT
|
---|
| 1072 | ACKCICHAP(CI_AUTHTYPE, !go->neg_eap && go->neg_chap, go->chap_mdtype);
|
---|
| 1073 | #endif /* EAP_SUPPORT */
|
---|
| 1074 | #if !EAP_SUPPORT
|
---|
| 1075 | ACKCICHAP(CI_AUTHTYPE, go->neg_chap, go->chap_mdtype);
|
---|
| 1076 | #endif /* !EAP_SUPPORT */
|
---|
| 1077 | #endif /* CHAP_SUPPORT */
|
---|
| 1078 | #if PAP_SUPPORT /* cannot be improved, embedding a directive within macro arguments is not portable */
|
---|
| 1079 | #if EAP_SUPPORT && CHAP_SUPPORT
|
---|
| 1080 | ACKCISHORT(CI_AUTHTYPE, !go->neg_eap && !go->neg_chap && go->neg_upap, PPP_PAP);
|
---|
| 1081 | #endif /* EAP_SUPPORT && CHAP_SUPPORT */
|
---|
| 1082 | #if EAP_SUPPORT && !CHAP_SUPPORT
|
---|
| 1083 | ACKCISHORT(CI_AUTHTYPE, !go->neg_eap && go->neg_upap, PPP_PAP);
|
---|
| 1084 | #endif /* EAP_SUPPORT && !CHAP_SUPPORT */
|
---|
| 1085 | #if !EAP_SUPPORT && CHAP_SUPPORT
|
---|
| 1086 | ACKCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
|
---|
| 1087 | #endif /* !EAP_SUPPORT && CHAP_SUPPORT */
|
---|
| 1088 | #if !EAP_SUPPORT && !CHAP_SUPPORT
|
---|
| 1089 | ACKCISHORT(CI_AUTHTYPE, go->neg_upap, PPP_PAP);
|
---|
| 1090 | #endif /* !EAP_SUPPORT && !CHAP_SUPPORT */
|
---|
| 1091 | #endif /* PAP_SUPPORT */
|
---|
| 1092 | #if LQR_SUPPORT
|
---|
| 1093 | ACKCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
|
---|
| 1094 | #endif /* LQR_SUPPORT */
|
---|
| 1095 | ACKCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
|
---|
| 1096 | ACKCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
|
---|
| 1097 | ACKCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
|
---|
| 1098 | ACKCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
|
---|
| 1099 | #ifdef HAVE_MULTILINK
|
---|
| 1100 | ACKCISHORT(CI_MRRU, go->neg_mrru, go->mrru);
|
---|
| 1101 | #endif /* HAVE_MULTILINK */
|
---|
| 1102 | ACKCIVOID(CI_SSNHF, go->neg_ssnhf);
|
---|
| 1103 | ACKCIENDP(CI_EPDISC, go->neg_endpoint, go->endpoint.class_,
|
---|
| 1104 | go->endpoint.value, go->endpoint.length);
|
---|
| 1105 |
|
---|
| 1106 | /*
|
---|
| 1107 | * If there are any remaining CIs, then this packet is bad.
|
---|
| 1108 | */
|
---|
| 1109 | if (len != 0)
|
---|
| 1110 | goto bad;
|
---|
| 1111 | return (1);
|
---|
| 1112 | bad:
|
---|
| 1113 | LCPDEBUG(("lcp_acki: received bad Ack!"));
|
---|
| 1114 | return (0);
|
---|
| 1115 | }
|
---|
| 1116 |
|
---|
| 1117 |
|
---|
| 1118 | /*
|
---|
| 1119 | * lcp_nakci - Peer has sent a NAK for some of our CIs.
|
---|
| 1120 | * This should not modify any state if the Nak is bad
|
---|
| 1121 | * or if LCP is in the OPENED state.
|
---|
| 1122 | *
|
---|
| 1123 | * Returns:
|
---|
| 1124 | * 0 - Nak was bad.
|
---|
| 1125 | * 1 - Nak was good.
|
---|
| 1126 | */
|
---|
| 1127 | static int lcp_nakci(fsm *f, u_char *p, int len, int treat_as_reject) {
|
---|
| 1128 | ppp_pcb *pcb = f->pcb;
|
---|
| 1129 | lcp_options *go = &pcb->lcp_gotoptions;
|
---|
| 1130 | lcp_options *wo = &pcb->lcp_wantoptions;
|
---|
| 1131 | u_char citype, cichar, *next;
|
---|
| 1132 | u_short cishort;
|
---|
| 1133 | u32_t cilong;
|
---|
| 1134 | lcp_options no; /* options we've seen Naks for */
|
---|
| 1135 | lcp_options try_; /* options to request next time */
|
---|
| 1136 | int looped_back = 0;
|
---|
| 1137 | int cilen;
|
---|
| 1138 |
|
---|
| 1139 | BZERO(&no, sizeof(no));
|
---|
| 1140 | try_ = *go;
|
---|
| 1141 |
|
---|
| 1142 | /*
|
---|
| 1143 | * Any Nak'd CIs must be in exactly the same order that we sent.
|
---|
| 1144 | * Check packet length and CI length at each step.
|
---|
| 1145 | * If we find any deviations, then this packet is bad.
|
---|
| 1146 | */
|
---|
| 1147 | #define NAKCIVOID(opt, neg) \
|
---|
| 1148 | if (go->neg && \
|
---|
| 1149 | len >= CILEN_VOID && \
|
---|
| 1150 | p[1] == CILEN_VOID && \
|
---|
| 1151 | p[0] == opt) { \
|
---|
| 1152 | len -= CILEN_VOID; \
|
---|
| 1153 | INCPTR(CILEN_VOID, p); \
|
---|
| 1154 | no.neg = 1; \
|
---|
| 1155 | try_.neg = 0; \
|
---|
| 1156 | }
|
---|
| 1157 | #if CHAP_SUPPORT
|
---|
| 1158 | #define NAKCICHAP(opt, neg, code) \
|
---|
| 1159 | if (go->neg && \
|
---|
| 1160 | len >= CILEN_CHAP && \
|
---|
| 1161 | p[1] == CILEN_CHAP && \
|
---|
| 1162 | p[0] == opt) { \
|
---|
| 1163 | len -= CILEN_CHAP; \
|
---|
| 1164 | INCPTR(2, p); \
|
---|
| 1165 | GETSHORT(cishort, p); \
|
---|
| 1166 | GETCHAR(cichar, p); \
|
---|
| 1167 | no.neg = 1; \
|
---|
| 1168 | code \
|
---|
| 1169 | }
|
---|
| 1170 | #endif /* CHAP_SUPPORT */
|
---|
| 1171 | #define NAKCICHAR(opt, neg, code) \
|
---|
| 1172 | if (go->neg && \
|
---|
| 1173 | len >= CILEN_CHAR && \
|
---|
| 1174 | p[1] == CILEN_CHAR && \
|
---|
| 1175 | p[0] == opt) { \
|
---|
| 1176 | len -= CILEN_CHAR; \
|
---|
| 1177 | INCPTR(2, p); \
|
---|
| 1178 | GETCHAR(cichar, p); \
|
---|
| 1179 | no.neg = 1; \
|
---|
| 1180 | code \
|
---|
| 1181 | }
|
---|
| 1182 | #define NAKCISHORT(opt, neg, code) \
|
---|
| 1183 | if (go->neg && \
|
---|
| 1184 | len >= CILEN_SHORT && \
|
---|
| 1185 | p[1] == CILEN_SHORT && \
|
---|
| 1186 | p[0] == opt) { \
|
---|
| 1187 | len -= CILEN_SHORT; \
|
---|
| 1188 | INCPTR(2, p); \
|
---|
| 1189 | GETSHORT(cishort, p); \
|
---|
| 1190 | no.neg = 1; \
|
---|
| 1191 | code \
|
---|
| 1192 | }
|
---|
| 1193 | #define NAKCILONG(opt, neg, code) \
|
---|
| 1194 | if (go->neg && \
|
---|
| 1195 | len >= CILEN_LONG && \
|
---|
| 1196 | p[1] == CILEN_LONG && \
|
---|
| 1197 | p[0] == opt) { \
|
---|
| 1198 | len -= CILEN_LONG; \
|
---|
| 1199 | INCPTR(2, p); \
|
---|
| 1200 | GETLONG(cilong, p); \
|
---|
| 1201 | no.neg = 1; \
|
---|
| 1202 | code \
|
---|
| 1203 | }
|
---|
| 1204 | #if LQR_SUPPORT
|
---|
| 1205 | #define NAKCILQR(opt, neg, code) \
|
---|
| 1206 | if (go->neg && \
|
---|
| 1207 | len >= CILEN_LQR && \
|
---|
| 1208 | p[1] == CILEN_LQR && \
|
---|
| 1209 | p[0] == opt) { \
|
---|
| 1210 | len -= CILEN_LQR; \
|
---|
| 1211 | INCPTR(2, p); \
|
---|
| 1212 | GETSHORT(cishort, p); \
|
---|
| 1213 | GETLONG(cilong, p); \
|
---|
| 1214 | no.neg = 1; \
|
---|
| 1215 | code \
|
---|
| 1216 | }
|
---|
| 1217 | #endif /* LQR_SUPPORT */
|
---|
| 1218 | #define NAKCIENDP(opt, neg) \
|
---|
| 1219 | if (go->neg && \
|
---|
| 1220 | len >= CILEN_CHAR && \
|
---|
| 1221 | p[0] == opt && \
|
---|
| 1222 | p[1] >= CILEN_CHAR && \
|
---|
| 1223 | p[1] <= len) { \
|
---|
| 1224 | len -= p[1]; \
|
---|
| 1225 | INCPTR(p[1], p); \
|
---|
| 1226 | no.neg = 1; \
|
---|
| 1227 | try_.neg = 0; \
|
---|
| 1228 | }
|
---|
| 1229 |
|
---|
| 1230 | /*
|
---|
| 1231 | * NOTE! There must be no assignments to individual fields of *go in
|
---|
| 1232 | * the code below. Any such assignment is a BUG!
|
---|
| 1233 | */
|
---|
| 1234 | /*
|
---|
| 1235 | * We don't care if they want to send us smaller packets than
|
---|
| 1236 | * we want. Therefore, accept any MRU less than what we asked for,
|
---|
| 1237 | * but then ignore the new value when setting the MRU in the kernel.
|
---|
| 1238 | * If they send us a bigger MRU than what we asked, accept it, up to
|
---|
| 1239 | * the limit of the default MRU we'd get if we didn't negotiate.
|
---|
| 1240 | */
|
---|
| 1241 | if (go->neg_mru && go->mru != PPP_DEFMRU) {
|
---|
| 1242 | NAKCISHORT(CI_MRU, neg_mru,
|
---|
| 1243 | if (cishort <= wo->mru || cishort <= PPP_DEFMRU)
|
---|
| 1244 | try_.mru = cishort;
|
---|
| 1245 | );
|
---|
| 1246 | }
|
---|
| 1247 |
|
---|
| 1248 | /*
|
---|
| 1249 | * Add any characters they want to our (receive-side) asyncmap.
|
---|
| 1250 | */
|
---|
| 1251 | if (go->neg_asyncmap && go->asyncmap != 0xFFFFFFFF) {
|
---|
| 1252 | NAKCILONG(CI_ASYNCMAP, neg_asyncmap,
|
---|
| 1253 | try_.asyncmap = go->asyncmap | cilong;
|
---|
| 1254 | );
|
---|
| 1255 | }
|
---|
| 1256 |
|
---|
| 1257 | /*
|
---|
| 1258 | * If they've nak'd our authentication-protocol, check whether
|
---|
| 1259 | * they are proposing a different protocol, or a different
|
---|
| 1260 | * hash algorithm for CHAP.
|
---|
| 1261 | */
|
---|
| 1262 | if ((0
|
---|
| 1263 | #if CHAP_SUPPORT
|
---|
| 1264 | || go->neg_chap
|
---|
| 1265 | #endif /* CHAP_SUPPORT */
|
---|
| 1266 | #if PAP_SUPPORT
|
---|
| 1267 | || go->neg_upap
|
---|
| 1268 | #endif /* PAP_SUPPORT */
|
---|
| 1269 | #if EAP_SUPPORT
|
---|
| 1270 | || go->neg_eap
|
---|
| 1271 | #endif /* EAP_SUPPORT */
|
---|
| 1272 | )
|
---|
| 1273 | && len >= CILEN_SHORT
|
---|
| 1274 | && p[0] == CI_AUTHTYPE && p[1] >= CILEN_SHORT && p[1] <= len) {
|
---|
| 1275 | cilen = p[1];
|
---|
| 1276 | len -= cilen;
|
---|
| 1277 | #if CHAP_SUPPORT
|
---|
| 1278 | no.neg_chap = go->neg_chap;
|
---|
| 1279 | #endif /* CHAP_SUPPORT */
|
---|
| 1280 | #if PAP_SUPPORT
|
---|
| 1281 | no.neg_upap = go->neg_upap;
|
---|
| 1282 | #endif /* PAP_SUPPORT */
|
---|
| 1283 | #if EAP_SUPPORT
|
---|
| 1284 | no.neg_eap = go->neg_eap;
|
---|
| 1285 | #endif /* EAP_SUPPORT */
|
---|
| 1286 | INCPTR(2, p);
|
---|
| 1287 | GETSHORT(cishort, p);
|
---|
| 1288 |
|
---|
| 1289 | #if PAP_SUPPORT
|
---|
| 1290 | if (cishort == PPP_PAP && cilen == CILEN_SHORT) {
|
---|
| 1291 | #if EAP_SUPPORT
|
---|
| 1292 | /* If we were asking for EAP, then we need to stop that. */
|
---|
| 1293 | if (go->neg_eap)
|
---|
| 1294 | try_.neg_eap = 0;
|
---|
| 1295 | else
|
---|
| 1296 | #endif /* EAP_SUPPORT */
|
---|
| 1297 |
|
---|
| 1298 | #if CHAP_SUPPORT
|
---|
| 1299 | /* If we were asking for CHAP, then we need to stop that. */
|
---|
| 1300 | if (go->neg_chap)
|
---|
| 1301 | try_.neg_chap = 0;
|
---|
| 1302 | else
|
---|
| 1303 | #endif /* CHAP_SUPPORT */
|
---|
| 1304 |
|
---|
| 1305 | /*
|
---|
| 1306 | * If we weren't asking for CHAP or EAP, then we were asking for
|
---|
| 1307 | * PAP, in which case this Nak is bad.
|
---|
| 1308 | */
|
---|
| 1309 | goto bad;
|
---|
| 1310 | } else
|
---|
| 1311 | #endif /* PAP_SUPPORT */
|
---|
| 1312 |
|
---|
| 1313 | #if CHAP_SUPPORT
|
---|
| 1314 | if (cishort == PPP_CHAP && cilen == CILEN_CHAP) {
|
---|
| 1315 | GETCHAR(cichar, p);
|
---|
| 1316 | #if EAP_SUPPORT
|
---|
| 1317 | /* Stop asking for EAP, if we were. */
|
---|
| 1318 | if (go->neg_eap) {
|
---|
| 1319 | try_.neg_eap = 0;
|
---|
| 1320 | /* Try to set up to use their suggestion, if possible */
|
---|
| 1321 | if (CHAP_CANDIGEST(go->chap_mdtype, cichar))
|
---|
| 1322 | try_.chap_mdtype = CHAP_MDTYPE_D(cichar);
|
---|
| 1323 | } else
|
---|
| 1324 | #endif /* EAP_SUPPORT */
|
---|
| 1325 | if (go->neg_chap) {
|
---|
| 1326 | /*
|
---|
| 1327 | * We were asking for our preferred algorithm, they must
|
---|
| 1328 | * want something different.
|
---|
| 1329 | */
|
---|
| 1330 | if (cichar != CHAP_DIGEST(go->chap_mdtype)) {
|
---|
| 1331 | if (CHAP_CANDIGEST(go->chap_mdtype, cichar)) {
|
---|
| 1332 | /* Use their suggestion if we support it ... */
|
---|
| 1333 | try_.chap_mdtype = CHAP_MDTYPE_D(cichar);
|
---|
| 1334 | } else {
|
---|
| 1335 | /* ... otherwise, try our next-preferred algorithm. */
|
---|
| 1336 | try_.chap_mdtype &= ~(CHAP_MDTYPE(try_.chap_mdtype));
|
---|
| 1337 | if (try_.chap_mdtype == MDTYPE_NONE) /* out of algos */
|
---|
| 1338 | try_.neg_chap = 0;
|
---|
| 1339 | }
|
---|
| 1340 | } else {
|
---|
| 1341 | /*
|
---|
| 1342 | * Whoops, they Nak'd our algorithm of choice
|
---|
| 1343 | * but then suggested it back to us.
|
---|
| 1344 | */
|
---|
| 1345 | goto bad;
|
---|
| 1346 | }
|
---|
| 1347 | } else {
|
---|
| 1348 | /*
|
---|
| 1349 | * Stop asking for PAP if we were asking for it.
|
---|
| 1350 | */
|
---|
| 1351 | #if PAP_SUPPORT
|
---|
| 1352 | try_.neg_upap = 0;
|
---|
| 1353 | #endif /* PAP_SUPPORT */
|
---|
| 1354 | }
|
---|
| 1355 |
|
---|
| 1356 | } else
|
---|
| 1357 | #endif /* CHAP_SUPPORT */
|
---|
| 1358 | {
|
---|
| 1359 |
|
---|
| 1360 | #if EAP_SUPPORT
|
---|
| 1361 | /*
|
---|
| 1362 | * If we were asking for EAP, and they're Conf-Naking EAP,
|
---|
| 1363 | * well, that's just strange. Nobody should do that.
|
---|
| 1364 | */
|
---|
| 1365 | if (cishort == PPP_EAP && cilen == CILEN_SHORT && go->neg_eap)
|
---|
| 1366 | ppp_dbglog("Unexpected Conf-Nak for EAP");
|
---|
| 1367 |
|
---|
| 1368 | /*
|
---|
| 1369 | * We don't recognize what they're suggesting.
|
---|
| 1370 | * Stop asking for what we were asking for.
|
---|
| 1371 | */
|
---|
| 1372 | if (go->neg_eap)
|
---|
| 1373 | try_.neg_eap = 0;
|
---|
| 1374 | else
|
---|
| 1375 | #endif /* EAP_SUPPORT */
|
---|
| 1376 |
|
---|
| 1377 | #if CHAP_SUPPORT
|
---|
| 1378 | if (go->neg_chap)
|
---|
| 1379 | try_.neg_chap = 0;
|
---|
| 1380 | else
|
---|
| 1381 | #endif /* CHAP_SUPPORT */
|
---|
| 1382 |
|
---|
| 1383 | #if PAP_SUPPORT
|
---|
| 1384 | if(1)
|
---|
| 1385 | try_.neg_upap = 0;
|
---|
| 1386 | else
|
---|
| 1387 | #endif /* PAP_SUPPORT */
|
---|
| 1388 | {}
|
---|
| 1389 |
|
---|
| 1390 | p += cilen - CILEN_SHORT;
|
---|
| 1391 | }
|
---|
| 1392 | }
|
---|
| 1393 |
|
---|
| 1394 | #if LQR_SUPPORT
|
---|
| 1395 | /*
|
---|
| 1396 | * If they can't cope with our link quality protocol, we'll have
|
---|
| 1397 | * to stop asking for LQR. We haven't got any other protocol.
|
---|
| 1398 | * If they Nak the reporting period, take their value XXX ?
|
---|
| 1399 | */
|
---|
| 1400 | NAKCILQR(CI_QUALITY, neg_lqr,
|
---|
| 1401 | if (cishort != PPP_LQR)
|
---|
| 1402 | try_.neg_lqr = 0;
|
---|
| 1403 | else
|
---|
| 1404 | try_.lqr_period = cilong;
|
---|
| 1405 | );
|
---|
| 1406 | #endif /* LQR_SUPPORT */
|
---|
| 1407 |
|
---|
| 1408 | /*
|
---|
| 1409 | * Only implementing CBCP...not the rest of the callback options
|
---|
| 1410 | */
|
---|
| 1411 | NAKCICHAR(CI_CALLBACK, neg_cbcp,
|
---|
| 1412 | try_.neg_cbcp = 0;
|
---|
| 1413 | (void)cichar; /* if CHAP support is not compiled, cichar is set but not used, which makes some compilers complaining */
|
---|
| 1414 | );
|
---|
| 1415 |
|
---|
| 1416 | /*
|
---|
| 1417 | * Check for a looped-back line.
|
---|
| 1418 | */
|
---|
| 1419 | NAKCILONG(CI_MAGICNUMBER, neg_magicnumber,
|
---|
| 1420 | try_.magicnumber = magic();
|
---|
| 1421 | looped_back = 1;
|
---|
| 1422 | );
|
---|
| 1423 |
|
---|
| 1424 | /*
|
---|
| 1425 | * Peer shouldn't send Nak for protocol compression or
|
---|
| 1426 | * address/control compression requests; they should send
|
---|
| 1427 | * a Reject instead. If they send a Nak, treat it as a Reject.
|
---|
| 1428 | */
|
---|
| 1429 | NAKCIVOID(CI_PCOMPRESSION, neg_pcompression);
|
---|
| 1430 | NAKCIVOID(CI_ACCOMPRESSION, neg_accompression);
|
---|
| 1431 |
|
---|
| 1432 | #ifdef HAVE_MULTILINK
|
---|
| 1433 | /*
|
---|
| 1434 | * Nak for MRRU option - accept their value if it is smaller
|
---|
| 1435 | * than the one we want.
|
---|
| 1436 | */
|
---|
| 1437 | if (go->neg_mrru) {
|
---|
| 1438 | NAKCISHORT(CI_MRRU, neg_mrru,
|
---|
| 1439 | if (treat_as_reject)
|
---|
| 1440 | try_.neg_mrru = 0;
|
---|
| 1441 | else if (cishort <= wo->mrru)
|
---|
| 1442 | try_.mrru = cishort;
|
---|
| 1443 | );
|
---|
| 1444 | }
|
---|
| 1445 | #else /* HAVE_MULTILINK */
|
---|
| 1446 | LWIP_UNUSED_ARG(treat_as_reject);
|
---|
| 1447 | #endif /* HAVE_MULTILINK */
|
---|
| 1448 |
|
---|
| 1449 | /*
|
---|
| 1450 | * Nak for short sequence numbers shouldn't be sent, treat it
|
---|
| 1451 | * like a reject.
|
---|
| 1452 | */
|
---|
| 1453 | NAKCIVOID(CI_SSNHF, neg_ssnhf);
|
---|
| 1454 |
|
---|
| 1455 | /*
|
---|
| 1456 | * Nak of the endpoint discriminator option is not permitted,
|
---|
| 1457 | * treat it like a reject.
|
---|
| 1458 | */
|
---|
| 1459 | NAKCIENDP(CI_EPDISC, neg_endpoint);
|
---|
| 1460 |
|
---|
| 1461 | /*
|
---|
| 1462 | * There may be remaining CIs, if the peer is requesting negotiation
|
---|
| 1463 | * on an option that we didn't include in our request packet.
|
---|
| 1464 | * If we see an option that we requested, or one we've already seen
|
---|
| 1465 | * in this packet, then this packet is bad.
|
---|
| 1466 | * If we wanted to respond by starting to negotiate on the requested
|
---|
| 1467 | * option(s), we could, but we don't, because except for the
|
---|
| 1468 | * authentication type and quality protocol, if we are not negotiating
|
---|
| 1469 | * an option, it is because we were told not to.
|
---|
| 1470 | * For the authentication type, the Nak from the peer means
|
---|
| 1471 | * `let me authenticate myself with you' which is a bit pointless.
|
---|
| 1472 | * For the quality protocol, the Nak means `ask me to send you quality
|
---|
| 1473 | * reports', but if we didn't ask for them, we don't want them.
|
---|
| 1474 | * An option we don't recognize represents the peer asking to
|
---|
| 1475 | * negotiate some option we don't support, so ignore it.
|
---|
| 1476 | */
|
---|
| 1477 | while (len >= CILEN_VOID) {
|
---|
| 1478 | GETCHAR(citype, p);
|
---|
| 1479 | GETCHAR(cilen, p);
|
---|
| 1480 | if (cilen < CILEN_VOID || (len -= cilen) < 0)
|
---|
| 1481 | goto bad;
|
---|
| 1482 | next = p + cilen - 2;
|
---|
| 1483 |
|
---|
| 1484 | switch (citype) {
|
---|
| 1485 | case CI_MRU:
|
---|
| 1486 | if ((go->neg_mru && go->mru != PPP_DEFMRU)
|
---|
| 1487 | || no.neg_mru || cilen != CILEN_SHORT)
|
---|
| 1488 | goto bad;
|
---|
| 1489 | GETSHORT(cishort, p);
|
---|
| 1490 | if (cishort < PPP_DEFMRU) {
|
---|
| 1491 | try_.neg_mru = 1;
|
---|
| 1492 | try_.mru = cishort;
|
---|
| 1493 | }
|
---|
| 1494 | break;
|
---|
| 1495 | case CI_ASYNCMAP:
|
---|
| 1496 | if ((go->neg_asyncmap && go->asyncmap != 0xFFFFFFFF)
|
---|
| 1497 | || no.neg_asyncmap || cilen != CILEN_LONG)
|
---|
| 1498 | goto bad;
|
---|
| 1499 | break;
|
---|
| 1500 | case CI_AUTHTYPE:
|
---|
| 1501 | if (0
|
---|
| 1502 | #if CHAP_SUPPORT
|
---|
| 1503 | || go->neg_chap || no.neg_chap
|
---|
| 1504 | #endif /* CHAP_SUPPORT */
|
---|
| 1505 | #if PAP_SUPPORT
|
---|
| 1506 | || go->neg_upap || no.neg_upap
|
---|
| 1507 | #endif /* PAP_SUPPORT */
|
---|
| 1508 | #if EAP_SUPPORT
|
---|
| 1509 | || go->neg_eap || no.neg_eap
|
---|
| 1510 | #endif /* EAP_SUPPORT */
|
---|
| 1511 | )
|
---|
| 1512 | goto bad;
|
---|
| 1513 | break;
|
---|
| 1514 | case CI_MAGICNUMBER:
|
---|
| 1515 | if (go->neg_magicnumber || no.neg_magicnumber ||
|
---|
| 1516 | cilen != CILEN_LONG)
|
---|
| 1517 | goto bad;
|
---|
| 1518 | break;
|
---|
| 1519 | case CI_PCOMPRESSION:
|
---|
| 1520 | if (go->neg_pcompression || no.neg_pcompression
|
---|
| 1521 | || cilen != CILEN_VOID)
|
---|
| 1522 | goto bad;
|
---|
| 1523 | break;
|
---|
| 1524 | case CI_ACCOMPRESSION:
|
---|
| 1525 | if (go->neg_accompression || no.neg_accompression
|
---|
| 1526 | || cilen != CILEN_VOID)
|
---|
| 1527 | goto bad;
|
---|
| 1528 | break;
|
---|
| 1529 | #if LQR_SUPPORT
|
---|
| 1530 | case CI_QUALITY:
|
---|
| 1531 | if (go->neg_lqr || no.neg_lqr || cilen != CILEN_LQR)
|
---|
| 1532 | goto bad;
|
---|
| 1533 | break;
|
---|
| 1534 | #endif /* LQR_SUPPORT */
|
---|
| 1535 | #ifdef HAVE_MULTILINK
|
---|
| 1536 | case CI_MRRU:
|
---|
| 1537 | if (go->neg_mrru || no.neg_mrru || cilen != CILEN_SHORT)
|
---|
| 1538 | goto bad;
|
---|
| 1539 | break;
|
---|
| 1540 | #endif /* HAVE_MULTILINK */
|
---|
| 1541 | case CI_SSNHF:
|
---|
| 1542 | if (go->neg_ssnhf || no.neg_ssnhf || cilen != CILEN_VOID)
|
---|
| 1543 | goto bad;
|
---|
| 1544 | try_.neg_ssnhf = 1;
|
---|
| 1545 | break;
|
---|
| 1546 | case CI_EPDISC:
|
---|
| 1547 | if (go->neg_endpoint || no.neg_endpoint || cilen < CILEN_CHAR)
|
---|
| 1548 | goto bad;
|
---|
| 1549 | break;
|
---|
| 1550 | default:
|
---|
| 1551 | break;
|
---|
| 1552 | }
|
---|
| 1553 | p = next;
|
---|
| 1554 | }
|
---|
| 1555 |
|
---|
| 1556 | /*
|
---|
| 1557 | * OK, the Nak is good. Now we can update state.
|
---|
| 1558 | * If there are any options left we ignore them.
|
---|
| 1559 | */
|
---|
| 1560 | if (f->state != PPP_FSM_OPENED) {
|
---|
| 1561 | if (looped_back) {
|
---|
| 1562 | if (++try_.numloops >= pcb->settings.lcp_loopbackfail) {
|
---|
| 1563 | ppp_notice("Serial line is looped back.");
|
---|
| 1564 | pcb->err_code = PPPERR_LOOPBACK;
|
---|
| 1565 | lcp_close(f->pcb, "Loopback detected");
|
---|
| 1566 | }
|
---|
| 1567 | } else
|
---|
| 1568 | try_.numloops = 0;
|
---|
| 1569 | *go = try_;
|
---|
| 1570 | }
|
---|
| 1571 |
|
---|
| 1572 | return 1;
|
---|
| 1573 |
|
---|
| 1574 | bad:
|
---|
| 1575 | LCPDEBUG(("lcp_nakci: received bad Nak!"));
|
---|
| 1576 | return 0;
|
---|
| 1577 | }
|
---|
| 1578 |
|
---|
| 1579 |
|
---|
| 1580 | /*
|
---|
| 1581 | * lcp_rejci - Peer has Rejected some of our CIs.
|
---|
| 1582 | * This should not modify any state if the Reject is bad
|
---|
| 1583 | * or if LCP is in the OPENED state.
|
---|
| 1584 | *
|
---|
| 1585 | * Returns:
|
---|
| 1586 | * 0 - Reject was bad.
|
---|
| 1587 | * 1 - Reject was good.
|
---|
| 1588 | */
|
---|
| 1589 | static int lcp_rejci(fsm *f, u_char *p, int len) {
|
---|
| 1590 | ppp_pcb *pcb = f->pcb;
|
---|
| 1591 | lcp_options *go = &pcb->lcp_gotoptions;
|
---|
| 1592 | u_char cichar;
|
---|
| 1593 | u_short cishort;
|
---|
| 1594 | u32_t cilong;
|
---|
| 1595 | lcp_options try_; /* options to request next time */
|
---|
| 1596 |
|
---|
| 1597 | try_ = *go;
|
---|
| 1598 |
|
---|
| 1599 | /*
|
---|
| 1600 | * Any Rejected CIs must be in exactly the same order that we sent.
|
---|
| 1601 | * Check packet length and CI length at each step.
|
---|
| 1602 | * If we find any deviations, then this packet is bad.
|
---|
| 1603 | */
|
---|
| 1604 | #define REJCIVOID(opt, neg) \
|
---|
| 1605 | if (go->neg && \
|
---|
| 1606 | len >= CILEN_VOID && \
|
---|
| 1607 | p[1] == CILEN_VOID && \
|
---|
| 1608 | p[0] == opt) { \
|
---|
| 1609 | len -= CILEN_VOID; \
|
---|
| 1610 | INCPTR(CILEN_VOID, p); \
|
---|
| 1611 | try_.neg = 0; \
|
---|
| 1612 | }
|
---|
| 1613 | #define REJCISHORT(opt, neg, val) \
|
---|
| 1614 | if (go->neg && \
|
---|
| 1615 | len >= CILEN_SHORT && \
|
---|
| 1616 | p[1] == CILEN_SHORT && \
|
---|
| 1617 | p[0] == opt) { \
|
---|
| 1618 | len -= CILEN_SHORT; \
|
---|
| 1619 | INCPTR(2, p); \
|
---|
| 1620 | GETSHORT(cishort, p); \
|
---|
| 1621 | /* Check rejected value. */ \
|
---|
| 1622 | if (cishort != val) \
|
---|
| 1623 | goto bad; \
|
---|
| 1624 | try_.neg = 0; \
|
---|
| 1625 | }
|
---|
| 1626 |
|
---|
| 1627 | #if CHAP_SUPPORT && EAP_SUPPORT && PAP_SUPPORT
|
---|
| 1628 | #define REJCICHAP(opt, neg, val) \
|
---|
| 1629 | if (go->neg && \
|
---|
| 1630 | len >= CILEN_CHAP && \
|
---|
| 1631 | p[1] == CILEN_CHAP && \
|
---|
| 1632 | p[0] == opt) { \
|
---|
| 1633 | len -= CILEN_CHAP; \
|
---|
| 1634 | INCPTR(2, p); \
|
---|
| 1635 | GETSHORT(cishort, p); \
|
---|
| 1636 | GETCHAR(cichar, p); \
|
---|
| 1637 | /* Check rejected value. */ \
|
---|
| 1638 | if ((cishort != PPP_CHAP) || (cichar != (CHAP_DIGEST(val)))) \
|
---|
| 1639 | goto bad; \
|
---|
| 1640 | try_.neg = 0; \
|
---|
| 1641 | try_.neg_eap = try_.neg_upap = 0; \
|
---|
| 1642 | }
|
---|
| 1643 | #endif /* CHAP_SUPPORT && EAP_SUPPORT && PAP_SUPPORT */
|
---|
| 1644 |
|
---|
| 1645 | #if CHAP_SUPPORT && !EAP_SUPPORT && PAP_SUPPORT
|
---|
| 1646 | #define REJCICHAP(opt, neg, val) \
|
---|
| 1647 | if (go->neg && \
|
---|
| 1648 | len >= CILEN_CHAP && \
|
---|
| 1649 | p[1] == CILEN_CHAP && \
|
---|
| 1650 | p[0] == opt) { \
|
---|
| 1651 | len -= CILEN_CHAP; \
|
---|
| 1652 | INCPTR(2, p); \
|
---|
| 1653 | GETSHORT(cishort, p); \
|
---|
| 1654 | GETCHAR(cichar, p); \
|
---|
| 1655 | /* Check rejected value. */ \
|
---|
| 1656 | if ((cishort != PPP_CHAP) || (cichar != (CHAP_DIGEST(val)))) \
|
---|
| 1657 | goto bad; \
|
---|
| 1658 | try_.neg = 0; \
|
---|
| 1659 | try_.neg_upap = 0; \
|
---|
| 1660 | }
|
---|
| 1661 | #endif /* CHAP_SUPPORT && !EAP_SUPPORT && PAP_SUPPORT */
|
---|
| 1662 |
|
---|
| 1663 | #if CHAP_SUPPORT && EAP_SUPPORT && !PAP_SUPPORT
|
---|
| 1664 | #define REJCICHAP(opt, neg, val) \
|
---|
| 1665 | if (go->neg && \
|
---|
| 1666 | len >= CILEN_CHAP && \
|
---|
| 1667 | p[1] == CILEN_CHAP && \
|
---|
| 1668 | p[0] == opt) { \
|
---|
| 1669 | len -= CILEN_CHAP; \
|
---|
| 1670 | INCPTR(2, p); \
|
---|
| 1671 | GETSHORT(cishort, p); \
|
---|
| 1672 | GETCHAR(cichar, p); \
|
---|
| 1673 | /* Check rejected value. */ \
|
---|
| 1674 | if ((cishort != PPP_CHAP) || (cichar != (CHAP_DIGEST(val)))) \
|
---|
| 1675 | goto bad; \
|
---|
| 1676 | try_.neg = 0; \
|
---|
| 1677 | try_.neg_eap = 0; \
|
---|
| 1678 | }
|
---|
| 1679 | #endif /* CHAP_SUPPORT && EAP_SUPPORT && !PAP_SUPPORT */
|
---|
| 1680 |
|
---|
| 1681 | #if CHAP_SUPPORT && !EAP_SUPPORT && !PAP_SUPPORT
|
---|
| 1682 | #define REJCICHAP(opt, neg, val) \
|
---|
| 1683 | if (go->neg && \
|
---|
| 1684 | len >= CILEN_CHAP && \
|
---|
| 1685 | p[1] == CILEN_CHAP && \
|
---|
| 1686 | p[0] == opt) { \
|
---|
| 1687 | len -= CILEN_CHAP; \
|
---|
| 1688 | INCPTR(2, p); \
|
---|
| 1689 | GETSHORT(cishort, p); \
|
---|
| 1690 | GETCHAR(cichar, p); \
|
---|
| 1691 | /* Check rejected value. */ \
|
---|
| 1692 | if ((cishort != PPP_CHAP) || (cichar != (CHAP_DIGEST(val)))) \
|
---|
| 1693 | goto bad; \
|
---|
| 1694 | try_.neg = 0; \
|
---|
| 1695 | }
|
---|
| 1696 | #endif /* CHAP_SUPPORT && !EAP_SUPPORT && !PAP_SUPPORT */
|
---|
| 1697 |
|
---|
| 1698 | #define REJCILONG(opt, neg, val) \
|
---|
| 1699 | if (go->neg && \
|
---|
| 1700 | len >= CILEN_LONG && \
|
---|
| 1701 | p[1] == CILEN_LONG && \
|
---|
| 1702 | p[0] == opt) { \
|
---|
| 1703 | len -= CILEN_LONG; \
|
---|
| 1704 | INCPTR(2, p); \
|
---|
| 1705 | GETLONG(cilong, p); \
|
---|
| 1706 | /* Check rejected value. */ \
|
---|
| 1707 | if (cilong != val) \
|
---|
| 1708 | goto bad; \
|
---|
| 1709 | try_.neg = 0; \
|
---|
| 1710 | }
|
---|
| 1711 | #if LQR_SUPPORT
|
---|
| 1712 | #define REJCILQR(opt, neg, val) \
|
---|
| 1713 | if (go->neg && \
|
---|
| 1714 | len >= CILEN_LQR && \
|
---|
| 1715 | p[1] == CILEN_LQR && \
|
---|
| 1716 | p[0] == opt) { \
|
---|
| 1717 | len -= CILEN_LQR; \
|
---|
| 1718 | INCPTR(2, p); \
|
---|
| 1719 | GETSHORT(cishort, p); \
|
---|
| 1720 | GETLONG(cilong, p); \
|
---|
| 1721 | /* Check rejected value. */ \
|
---|
| 1722 | if (cishort != PPP_LQR || cilong != val) \
|
---|
| 1723 | goto bad; \
|
---|
| 1724 | try_.neg = 0; \
|
---|
| 1725 | }
|
---|
| 1726 | #endif /* LQR_SUPPORT */
|
---|
| 1727 | #define REJCICBCP(opt, neg, val) \
|
---|
| 1728 | if (go->neg && \
|
---|
| 1729 | len >= CILEN_CBCP && \
|
---|
| 1730 | p[1] == CILEN_CBCP && \
|
---|
| 1731 | p[0] == opt) { \
|
---|
| 1732 | len -= CILEN_CBCP; \
|
---|
| 1733 | INCPTR(2, p); \
|
---|
| 1734 | GETCHAR(cichar, p); \
|
---|
| 1735 | /* Check rejected value. */ \
|
---|
| 1736 | if (cichar != val) \
|
---|
| 1737 | goto bad; \
|
---|
| 1738 | try_.neg = 0; \
|
---|
| 1739 | }
|
---|
| 1740 | #define REJCIENDP(opt, neg, class, val, vlen) \
|
---|
| 1741 | if (go->neg && \
|
---|
| 1742 | len >= CILEN_CHAR + vlen && \
|
---|
| 1743 | p[0] == opt && \
|
---|
| 1744 | p[1] == CILEN_CHAR + vlen) { \
|
---|
| 1745 | int i; \
|
---|
| 1746 | len -= CILEN_CHAR + vlen; \
|
---|
| 1747 | INCPTR(2, p); \
|
---|
| 1748 | GETCHAR(cichar, p); \
|
---|
| 1749 | if (cichar != class) \
|
---|
| 1750 | goto bad; \
|
---|
| 1751 | for (i = 0; i < vlen; ++i) { \
|
---|
| 1752 | GETCHAR(cichar, p); \
|
---|
| 1753 | if (cichar != val[i]) \
|
---|
| 1754 | goto bad; \
|
---|
| 1755 | } \
|
---|
| 1756 | try_.neg = 0; \
|
---|
| 1757 | }
|
---|
| 1758 |
|
---|
| 1759 | REJCISHORT(CI_MRU, neg_mru, go->mru);
|
---|
| 1760 | REJCILONG(CI_ASYNCMAP, neg_asyncmap, go->asyncmap);
|
---|
| 1761 | #if EAP_SUPPORT
|
---|
| 1762 | REJCISHORT(CI_AUTHTYPE, neg_eap, PPP_EAP);
|
---|
| 1763 | if (!go->neg_eap) {
|
---|
| 1764 | #endif /* EAP_SUPPORT */
|
---|
| 1765 | #if CHAP_SUPPORT
|
---|
| 1766 | REJCICHAP(CI_AUTHTYPE, neg_chap, go->chap_mdtype);
|
---|
| 1767 | if (!go->neg_chap) {
|
---|
| 1768 | #endif /* CHAP_SUPPORT */
|
---|
| 1769 | #if PAP_SUPPORT
|
---|
| 1770 | REJCISHORT(CI_AUTHTYPE, neg_upap, PPP_PAP);
|
---|
| 1771 | #endif /* PAP_SUPPORT */
|
---|
| 1772 | #if CHAP_SUPPORT
|
---|
| 1773 | }
|
---|
| 1774 | #endif /* CHAP_SUPPORT */
|
---|
| 1775 | #if EAP_SUPPORT
|
---|
| 1776 | }
|
---|
| 1777 | #endif /* EAP_SUPPORT */
|
---|
| 1778 | #if LQR_SUPPORT
|
---|
| 1779 | REJCILQR(CI_QUALITY, neg_lqr, go->lqr_period);
|
---|
| 1780 | #endif /* LQR_SUPPORT */
|
---|
| 1781 | REJCICBCP(CI_CALLBACK, neg_cbcp, CBCP_OPT);
|
---|
| 1782 | REJCILONG(CI_MAGICNUMBER, neg_magicnumber, go->magicnumber);
|
---|
| 1783 | REJCIVOID(CI_PCOMPRESSION, neg_pcompression);
|
---|
| 1784 | REJCIVOID(CI_ACCOMPRESSION, neg_accompression);
|
---|
| 1785 | #ifdef HAVE_MULTILINK
|
---|
| 1786 | REJCISHORT(CI_MRRU, neg_mrru, go->mrru);
|
---|
| 1787 | #endif /* HAVE_MULTILINK */
|
---|
| 1788 | REJCIVOID(CI_SSNHF, neg_ssnhf);
|
---|
| 1789 | REJCIENDP(CI_EPDISC, neg_endpoint, go->endpoint.class_,
|
---|
| 1790 | go->endpoint.value, go->endpoint.length);
|
---|
| 1791 |
|
---|
| 1792 | /*
|
---|
| 1793 | * If there are any remaining CIs, then this packet is bad.
|
---|
| 1794 | */
|
---|
| 1795 | if (len != 0)
|
---|
| 1796 | goto bad;
|
---|
| 1797 | /*
|
---|
| 1798 | * Now we can update state.
|
---|
| 1799 | */
|
---|
| 1800 | if (f->state != PPP_FSM_OPENED)
|
---|
| 1801 | *go = try_;
|
---|
| 1802 | return 1;
|
---|
| 1803 |
|
---|
| 1804 | bad:
|
---|
| 1805 | LCPDEBUG(("lcp_rejci: received bad Reject!"));
|
---|
| 1806 | return 0;
|
---|
| 1807 | }
|
---|
| 1808 |
|
---|
| 1809 |
|
---|
| 1810 | /*
|
---|
| 1811 | * lcp_reqci - Check the peer's requested CIs and send appropriate response.
|
---|
| 1812 | *
|
---|
| 1813 | * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
|
---|
| 1814 | * appropriately. If reject_if_disagree is non-zero, doesn't return
|
---|
| 1815 | * CONFNAK; returns CONFREJ if it can't return CONFACK.
|
---|
| 1816 | *
|
---|
| 1817 | * inp = Requested CIs
|
---|
| 1818 | * lenp = Length of requested CIs
|
---|
| 1819 | */
|
---|
| 1820 | static int lcp_reqci(fsm *f, u_char *inp, int *lenp, int reject_if_disagree) {
|
---|
| 1821 | ppp_pcb *pcb = f->pcb;
|
---|
| 1822 | lcp_options *go = &pcb->lcp_gotoptions;
|
---|
| 1823 | lcp_options *ho = &pcb->lcp_hisoptions;
|
---|
| 1824 | lcp_options *ao = &pcb->lcp_allowoptions;
|
---|
| 1825 | u_char *cip, *next; /* Pointer to current and next CIs */
|
---|
| 1826 | int cilen, citype, cichar; /* Parsed len, type, char value */
|
---|
| 1827 | u_short cishort; /* Parsed short value */
|
---|
| 1828 | u32_t cilong; /* Parse long value */
|
---|
| 1829 | int rc = CONFACK; /* Final packet return code */
|
---|
| 1830 | int orc; /* Individual option return code */
|
---|
| 1831 | u_char *p; /* Pointer to next char to parse */
|
---|
| 1832 | u_char *rejp; /* Pointer to next char in reject frame */
|
---|
| 1833 | struct pbuf *nakp; /* Nak buffer */
|
---|
| 1834 | u_char *nakoutp; /* Pointer to next char in Nak frame */
|
---|
| 1835 | int l = *lenp; /* Length left */
|
---|
| 1836 |
|
---|
| 1837 | /*
|
---|
| 1838 | * Reset all his options.
|
---|
| 1839 | */
|
---|
| 1840 | BZERO(ho, sizeof(*ho));
|
---|
| 1841 |
|
---|
| 1842 | /*
|
---|
| 1843 | * Process all his options.
|
---|
| 1844 | */
|
---|
| 1845 | next = inp;
|
---|
| 1846 | nakp = pbuf_alloc(PBUF_RAW, (u16_t)(PPP_CTRL_PBUF_MAX_SIZE), PPP_CTRL_PBUF_TYPE);
|
---|
| 1847 | if(NULL == nakp)
|
---|
| 1848 | return 0;
|
---|
| 1849 | if(nakp->tot_len != nakp->len) {
|
---|
| 1850 | pbuf_free(nakp);
|
---|
| 1851 | return 0;
|
---|
| 1852 | }
|
---|
| 1853 |
|
---|
| 1854 | nakoutp = (u_char*)nakp->payload;
|
---|
| 1855 | rejp = inp;
|
---|
| 1856 | while (l) {
|
---|
| 1857 | orc = CONFACK; /* Assume success */
|
---|
| 1858 | cip = p = next; /* Remember begining of CI */
|
---|
| 1859 | if (l < 2 || /* Not enough data for CI header or */
|
---|
| 1860 | p[1] < 2 || /* CI length too small or */
|
---|
| 1861 | p[1] > l) { /* CI length too big? */
|
---|
| 1862 | LCPDEBUG(("lcp_reqci: bad CI length!"));
|
---|
| 1863 | orc = CONFREJ; /* Reject bad CI */
|
---|
| 1864 | cilen = l; /* Reject till end of packet */
|
---|
| 1865 | l = 0; /* Don't loop again */
|
---|
| 1866 | citype = 0;
|
---|
| 1867 | goto endswitch;
|
---|
| 1868 | }
|
---|
| 1869 | GETCHAR(citype, p); /* Parse CI type */
|
---|
| 1870 | GETCHAR(cilen, p); /* Parse CI length */
|
---|
| 1871 | l -= cilen; /* Adjust remaining length */
|
---|
| 1872 | next += cilen; /* Step to next CI */
|
---|
| 1873 |
|
---|
| 1874 | switch (citype) { /* Check CI type */
|
---|
| 1875 | case CI_MRU:
|
---|
| 1876 | if (!ao->neg_mru || /* Allow option? */
|
---|
| 1877 | cilen != CILEN_SHORT) { /* Check CI length */
|
---|
| 1878 | orc = CONFREJ; /* Reject CI */
|
---|
| 1879 | break;
|
---|
| 1880 | }
|
---|
| 1881 | GETSHORT(cishort, p); /* Parse MRU */
|
---|
| 1882 |
|
---|
| 1883 | /*
|
---|
| 1884 | * He must be able to receive at least our minimum.
|
---|
| 1885 | * No need to check a maximum. If he sends a large number,
|
---|
| 1886 | * we'll just ignore it.
|
---|
| 1887 | */
|
---|
| 1888 | if (cishort < PPP_MINMRU) {
|
---|
| 1889 | orc = CONFNAK; /* Nak CI */
|
---|
| 1890 | PUTCHAR(CI_MRU, nakoutp);
|
---|
| 1891 | PUTCHAR(CILEN_SHORT, nakoutp);
|
---|
| 1892 | PUTSHORT(PPP_MINMRU, nakoutp); /* Give him a hint */
|
---|
| 1893 | break;
|
---|
| 1894 | }
|
---|
| 1895 | ho->neg_mru = 1; /* Remember he sent MRU */
|
---|
| 1896 | ho->mru = cishort; /* And remember value */
|
---|
| 1897 | break;
|
---|
| 1898 |
|
---|
| 1899 | case CI_ASYNCMAP:
|
---|
| 1900 | if (!ao->neg_asyncmap ||
|
---|
| 1901 | cilen != CILEN_LONG) {
|
---|
| 1902 | orc = CONFREJ;
|
---|
| 1903 | break;
|
---|
| 1904 | }
|
---|
| 1905 | GETLONG(cilong, p);
|
---|
| 1906 |
|
---|
| 1907 | /*
|
---|
| 1908 | * Asyncmap must have set at least the bits
|
---|
| 1909 | * which are set in lcp_allowoptions[unit].asyncmap.
|
---|
| 1910 | */
|
---|
| 1911 | if ((ao->asyncmap & ~cilong) != 0) {
|
---|
| 1912 | orc = CONFNAK;
|
---|
| 1913 | PUTCHAR(CI_ASYNCMAP, nakoutp);
|
---|
| 1914 | PUTCHAR(CILEN_LONG, nakoutp);
|
---|
| 1915 | PUTLONG(ao->asyncmap | cilong, nakoutp);
|
---|
| 1916 | break;
|
---|
| 1917 | }
|
---|
| 1918 | ho->neg_asyncmap = 1;
|
---|
| 1919 | ho->asyncmap = cilong;
|
---|
| 1920 | break;
|
---|
| 1921 |
|
---|
| 1922 | case CI_AUTHTYPE:
|
---|
| 1923 | if (cilen < CILEN_SHORT ||
|
---|
| 1924 | !(0
|
---|
| 1925 | #if PAP_SUPPORT
|
---|
| 1926 | || ao->neg_upap
|
---|
| 1927 | #endif /* PAP_SUPPORT */
|
---|
| 1928 | #if CHAP_SUPPORT
|
---|
| 1929 | || ao->neg_chap
|
---|
| 1930 | #endif /* CHAP_SUPPORT */
|
---|
| 1931 | #if EAP_SUPPORT
|
---|
| 1932 | || ao->neg_eap
|
---|
| 1933 | #endif /* EAP_SUPPORT */
|
---|
| 1934 | )) {
|
---|
| 1935 | /*
|
---|
| 1936 | * Reject the option if we're not willing to authenticate.
|
---|
| 1937 | */
|
---|
| 1938 | ppp_dbglog("No auth is possible");
|
---|
| 1939 | orc = CONFREJ;
|
---|
| 1940 | break;
|
---|
| 1941 | }
|
---|
| 1942 | GETSHORT(cishort, p);
|
---|
| 1943 |
|
---|
| 1944 | /*
|
---|
| 1945 | * Authtype must be PAP, CHAP, or EAP.
|
---|
| 1946 | *
|
---|
| 1947 | * Note: if more than one of ao->neg_upap, ao->neg_chap, and
|
---|
| 1948 | * ao->neg_eap are set, and the peer sends a Configure-Request
|
---|
| 1949 | * with two or more authenticate-protocol requests, then we will
|
---|
| 1950 | * reject the second request.
|
---|
| 1951 | * Whether we end up doing CHAP, UPAP, or EAP depends then on
|
---|
| 1952 | * the ordering of the CIs in the peer's Configure-Request.
|
---|
| 1953 | */
|
---|
| 1954 |
|
---|
| 1955 | #if PAP_SUPPORT
|
---|
| 1956 | if (cishort == PPP_PAP) {
|
---|
| 1957 | /* we've already accepted CHAP or EAP */
|
---|
| 1958 | if (0
|
---|
| 1959 | #if CHAP_SUPPORT
|
---|
| 1960 | || ho->neg_chap
|
---|
| 1961 | #endif /* CHAP_SUPPORT */
|
---|
| 1962 | #if EAP_SUPPORT
|
---|
| 1963 | || ho->neg_eap
|
---|
| 1964 | #endif /* EAP_SUPPORT */
|
---|
| 1965 | || cilen != CILEN_SHORT) {
|
---|
| 1966 | LCPDEBUG(("lcp_reqci: rcvd AUTHTYPE PAP, rejecting..."));
|
---|
| 1967 | orc = CONFREJ;
|
---|
| 1968 | break;
|
---|
| 1969 | }
|
---|
| 1970 | if (!ao->neg_upap) { /* we don't want to do PAP */
|
---|
| 1971 | orc = CONFNAK; /* NAK it and suggest CHAP or EAP */
|
---|
| 1972 | PUTCHAR(CI_AUTHTYPE, nakoutp);
|
---|
| 1973 | #if EAP_SUPPORT
|
---|
| 1974 | if (ao->neg_eap) {
|
---|
| 1975 | PUTCHAR(CILEN_SHORT, nakoutp);
|
---|
| 1976 | PUTSHORT(PPP_EAP, nakoutp);
|
---|
| 1977 | } else {
|
---|
| 1978 | #endif /* EAP_SUPPORT */
|
---|
| 1979 | #if CHAP_SUPPORT
|
---|
| 1980 | PUTCHAR(CILEN_CHAP, nakoutp);
|
---|
| 1981 | PUTSHORT(PPP_CHAP, nakoutp);
|
---|
| 1982 | PUTCHAR(CHAP_DIGEST(ao->chap_mdtype), nakoutp);
|
---|
| 1983 | #endif /* CHAP_SUPPORT */
|
---|
| 1984 | #if EAP_SUPPORT
|
---|
| 1985 | }
|
---|
| 1986 | #endif /* EAP_SUPPORT */
|
---|
| 1987 | break;
|
---|
| 1988 | }
|
---|
| 1989 | ho->neg_upap = 1;
|
---|
| 1990 | break;
|
---|
| 1991 | }
|
---|
| 1992 | #endif /* PAP_SUPPORT */
|
---|
| 1993 | #if CHAP_SUPPORT
|
---|
| 1994 | if (cishort == PPP_CHAP) {
|
---|
| 1995 | /* we've already accepted PAP or EAP */
|
---|
| 1996 | if (
|
---|
| 1997 | #if PAP_SUPPORT
|
---|
| 1998 | ho->neg_upap ||
|
---|
| 1999 | #endif /* PAP_SUPPORT */
|
---|
| 2000 | #if EAP_SUPPORT
|
---|
| 2001 | ho->neg_eap ||
|
---|
| 2002 | #endif /* EAP_SUPPORT */
|
---|
| 2003 | cilen != CILEN_CHAP) {
|
---|
| 2004 | LCPDEBUG(("lcp_reqci: rcvd AUTHTYPE CHAP, rejecting..."));
|
---|
| 2005 | orc = CONFREJ;
|
---|
| 2006 | break;
|
---|
| 2007 | }
|
---|
| 2008 | if (!ao->neg_chap) { /* we don't want to do CHAP */
|
---|
| 2009 | orc = CONFNAK; /* NAK it and suggest EAP or PAP */
|
---|
| 2010 | PUTCHAR(CI_AUTHTYPE, nakoutp);
|
---|
| 2011 | PUTCHAR(CILEN_SHORT, nakoutp);
|
---|
| 2012 | #if EAP_SUPPORT
|
---|
| 2013 | if (ao->neg_eap) {
|
---|
| 2014 | PUTSHORT(PPP_EAP, nakoutp);
|
---|
| 2015 | } else
|
---|
| 2016 | #endif /* EAP_SUPPORT */
|
---|
| 2017 | #if PAP_SUPPORT
|
---|
| 2018 | if(1) {
|
---|
| 2019 | PUTSHORT(PPP_PAP, nakoutp);
|
---|
| 2020 | }
|
---|
| 2021 | else
|
---|
| 2022 | #endif /* PAP_SUPPORT */
|
---|
| 2023 | {}
|
---|
| 2024 | break;
|
---|
| 2025 | }
|
---|
| 2026 | GETCHAR(cichar, p); /* get digest type */
|
---|
| 2027 | if (!(CHAP_CANDIGEST(ao->chap_mdtype, cichar))) {
|
---|
| 2028 | /*
|
---|
| 2029 | * We can't/won't do the requested type,
|
---|
| 2030 | * suggest something else.
|
---|
| 2031 | */
|
---|
| 2032 | orc = CONFNAK;
|
---|
| 2033 | PUTCHAR(CI_AUTHTYPE, nakoutp);
|
---|
| 2034 | PUTCHAR(CILEN_CHAP, nakoutp);
|
---|
| 2035 | PUTSHORT(PPP_CHAP, nakoutp);
|
---|
| 2036 | PUTCHAR(CHAP_DIGEST(ao->chap_mdtype), nakoutp);
|
---|
| 2037 | break;
|
---|
| 2038 | }
|
---|
| 2039 | ho->chap_mdtype = CHAP_MDTYPE_D(cichar); /* save md type */
|
---|
| 2040 | ho->neg_chap = 1;
|
---|
| 2041 | break;
|
---|
| 2042 | }
|
---|
| 2043 | #endif /* CHAP_SUPPORT */
|
---|
| 2044 | #if EAP_SUPPORT
|
---|
| 2045 | if (cishort == PPP_EAP) {
|
---|
| 2046 | /* we've already accepted CHAP or PAP */
|
---|
| 2047 | if (
|
---|
| 2048 | #if CHAP_SUPPORT
|
---|
| 2049 | ho->neg_chap ||
|
---|
| 2050 | #endif /* CHAP_SUPPORT */
|
---|
| 2051 | #if PAP_SUPPORT
|
---|
| 2052 | ho->neg_upap ||
|
---|
| 2053 | #endif /* PAP_SUPPORT */
|
---|
| 2054 | cilen != CILEN_SHORT) {
|
---|
| 2055 | LCPDEBUG(("lcp_reqci: rcvd AUTHTYPE EAP, rejecting..."));
|
---|
| 2056 | orc = CONFREJ;
|
---|
| 2057 | break;
|
---|
| 2058 | }
|
---|
| 2059 | if (!ao->neg_eap) { /* we don't want to do EAP */
|
---|
| 2060 | orc = CONFNAK; /* NAK it and suggest CHAP or PAP */
|
---|
| 2061 | PUTCHAR(CI_AUTHTYPE, nakoutp);
|
---|
| 2062 | #if CHAP_SUPPORT
|
---|
| 2063 | if (ao->neg_chap) {
|
---|
| 2064 | PUTCHAR(CILEN_CHAP, nakoutp);
|
---|
| 2065 | PUTSHORT(PPP_CHAP, nakoutp);
|
---|
| 2066 | PUTCHAR(CHAP_DIGEST(ao->chap_mdtype), nakoutp);
|
---|
| 2067 | } else
|
---|
| 2068 | #endif /* CHAP_SUPPORT */
|
---|
| 2069 | #if PAP_SUPPORT
|
---|
| 2070 | if(1) {
|
---|
| 2071 | PUTCHAR(CILEN_SHORT, nakoutp);
|
---|
| 2072 | PUTSHORT(PPP_PAP, nakoutp);
|
---|
| 2073 | } else
|
---|
| 2074 | #endif /* PAP_SUPPORT */
|
---|
| 2075 | {}
|
---|
| 2076 | break;
|
---|
| 2077 | }
|
---|
| 2078 | ho->neg_eap = 1;
|
---|
| 2079 | break;
|
---|
| 2080 | }
|
---|
| 2081 | #endif /* EAP_SUPPORT */
|
---|
| 2082 |
|
---|
| 2083 | /*
|
---|
| 2084 | * We don't recognize the protocol they're asking for.
|
---|
| 2085 | * Nak it with something we're willing to do.
|
---|
| 2086 | * (At this point we know ao->neg_upap || ao->neg_chap ||
|
---|
| 2087 | * ao->neg_eap.)
|
---|
| 2088 | */
|
---|
| 2089 | orc = CONFNAK;
|
---|
| 2090 | PUTCHAR(CI_AUTHTYPE, nakoutp);
|
---|
| 2091 |
|
---|
| 2092 | #if EAP_SUPPORT
|
---|
| 2093 | if (ao->neg_eap) {
|
---|
| 2094 | PUTCHAR(CILEN_SHORT, nakoutp);
|
---|
| 2095 | PUTSHORT(PPP_EAP, nakoutp);
|
---|
| 2096 | } else
|
---|
| 2097 | #endif /* EAP_SUPPORT */
|
---|
| 2098 | #if CHAP_SUPPORT
|
---|
| 2099 | if (ao->neg_chap) {
|
---|
| 2100 | PUTCHAR(CILEN_CHAP, nakoutp);
|
---|
| 2101 | PUTSHORT(PPP_CHAP, nakoutp);
|
---|
| 2102 | PUTCHAR(CHAP_DIGEST(ao->chap_mdtype), nakoutp);
|
---|
| 2103 | } else
|
---|
| 2104 | #endif /* CHAP_SUPPORT */
|
---|
| 2105 | #if PAP_SUPPORT
|
---|
| 2106 | if(1) {
|
---|
| 2107 | PUTCHAR(CILEN_SHORT, nakoutp);
|
---|
| 2108 | PUTSHORT(PPP_PAP, nakoutp);
|
---|
| 2109 | } else
|
---|
| 2110 | #endif /* PAP_SUPPORT */
|
---|
| 2111 | {}
|
---|
| 2112 | break;
|
---|
| 2113 |
|
---|
| 2114 | #if LQR_SUPPORT
|
---|
| 2115 | case CI_QUALITY:
|
---|
| 2116 | if (!ao->neg_lqr ||
|
---|
| 2117 | cilen != CILEN_LQR) {
|
---|
| 2118 | orc = CONFREJ;
|
---|
| 2119 | break;
|
---|
| 2120 | }
|
---|
| 2121 |
|
---|
| 2122 | GETSHORT(cishort, p);
|
---|
| 2123 | GETLONG(cilong, p);
|
---|
| 2124 |
|
---|
| 2125 | /*
|
---|
| 2126 | * Check the protocol and the reporting period.
|
---|
| 2127 | * XXX When should we Nak this, and what with?
|
---|
| 2128 | */
|
---|
| 2129 | if (cishort != PPP_LQR) {
|
---|
| 2130 | orc = CONFNAK;
|
---|
| 2131 | PUTCHAR(CI_QUALITY, nakoutp);
|
---|
| 2132 | PUTCHAR(CILEN_LQR, nakoutp);
|
---|
| 2133 | PUTSHORT(PPP_LQR, nakoutp);
|
---|
| 2134 | PUTLONG(ao->lqr_period, nakoutp);
|
---|
| 2135 | break;
|
---|
| 2136 | }
|
---|
| 2137 | break;
|
---|
| 2138 | #endif /* LQR_SUPPORT */
|
---|
| 2139 |
|
---|
| 2140 | case CI_MAGICNUMBER:
|
---|
| 2141 | if (!(ao->neg_magicnumber || go->neg_magicnumber) ||
|
---|
| 2142 | cilen != CILEN_LONG) {
|
---|
| 2143 | orc = CONFREJ;
|
---|
| 2144 | break;
|
---|
| 2145 | }
|
---|
| 2146 | GETLONG(cilong, p);
|
---|
| 2147 |
|
---|
| 2148 | /*
|
---|
| 2149 | * He must have a different magic number.
|
---|
| 2150 | */
|
---|
| 2151 | if (go->neg_magicnumber &&
|
---|
| 2152 | cilong == go->magicnumber) {
|
---|
| 2153 | cilong = magic(); /* Don't put magic() inside macro! */
|
---|
| 2154 | orc = CONFNAK;
|
---|
| 2155 | PUTCHAR(CI_MAGICNUMBER, nakoutp);
|
---|
| 2156 | PUTCHAR(CILEN_LONG, nakoutp);
|
---|
| 2157 | PUTLONG(cilong, nakoutp);
|
---|
| 2158 | break;
|
---|
| 2159 | }
|
---|
| 2160 | ho->neg_magicnumber = 1;
|
---|
| 2161 | ho->magicnumber = cilong;
|
---|
| 2162 | break;
|
---|
| 2163 |
|
---|
| 2164 |
|
---|
| 2165 | case CI_PCOMPRESSION:
|
---|
| 2166 | if (!ao->neg_pcompression ||
|
---|
| 2167 | cilen != CILEN_VOID) {
|
---|
| 2168 | orc = CONFREJ;
|
---|
| 2169 | break;
|
---|
| 2170 | }
|
---|
| 2171 | ho->neg_pcompression = 1;
|
---|
| 2172 | break;
|
---|
| 2173 |
|
---|
| 2174 | case CI_ACCOMPRESSION:
|
---|
| 2175 | if (!ao->neg_accompression ||
|
---|
| 2176 | cilen != CILEN_VOID) {
|
---|
| 2177 | orc = CONFREJ;
|
---|
| 2178 | break;
|
---|
| 2179 | }
|
---|
| 2180 | ho->neg_accompression = 1;
|
---|
| 2181 | break;
|
---|
| 2182 |
|
---|
| 2183 | #ifdef HAVE_MULTILINK
|
---|
| 2184 | case CI_MRRU:
|
---|
| 2185 | if (!ao->neg_mrru
|
---|
| 2186 | || !multilink
|
---|
| 2187 | || cilen != CILEN_SHORT) {
|
---|
| 2188 | orc = CONFREJ;
|
---|
| 2189 | break;
|
---|
| 2190 | }
|
---|
| 2191 |
|
---|
| 2192 | GETSHORT(cishort, p);
|
---|
| 2193 | /* possibly should insist on a minimum/maximum MRRU here */
|
---|
| 2194 | ho->neg_mrru = 1;
|
---|
| 2195 | ho->mrru = cishort;
|
---|
| 2196 | break;
|
---|
| 2197 | #endif /* HAVE_MULTILINK */
|
---|
| 2198 |
|
---|
| 2199 | case CI_SSNHF:
|
---|
| 2200 | if (!ao->neg_ssnhf
|
---|
| 2201 | #ifdef HAVE_MULTILINK
|
---|
| 2202 | || !multilink
|
---|
| 2203 | #endif /* HAVE_MULTILINK */
|
---|
| 2204 | || cilen != CILEN_VOID) {
|
---|
| 2205 | orc = CONFREJ;
|
---|
| 2206 | break;
|
---|
| 2207 | }
|
---|
| 2208 | ho->neg_ssnhf = 1;
|
---|
| 2209 | break;
|
---|
| 2210 |
|
---|
| 2211 | case CI_EPDISC:
|
---|
| 2212 | if (!ao->neg_endpoint ||
|
---|
| 2213 | cilen < CILEN_CHAR ||
|
---|
| 2214 | cilen > CILEN_CHAR + MAX_ENDP_LEN) {
|
---|
| 2215 | orc = CONFREJ;
|
---|
| 2216 | break;
|
---|
| 2217 | }
|
---|
| 2218 | GETCHAR(cichar, p);
|
---|
| 2219 | cilen -= CILEN_CHAR;
|
---|
| 2220 | ho->neg_endpoint = 1;
|
---|
| 2221 | ho->endpoint.class_ = cichar;
|
---|
| 2222 | ho->endpoint.length = cilen;
|
---|
| 2223 | MEMCPY(ho->endpoint.value, p, cilen);
|
---|
| 2224 | INCPTR(cilen, p);
|
---|
| 2225 | break;
|
---|
| 2226 |
|
---|
| 2227 | default:
|
---|
| 2228 | LCPDEBUG(("lcp_reqci: rcvd unknown option %d", citype));
|
---|
| 2229 | orc = CONFREJ;
|
---|
| 2230 | break;
|
---|
| 2231 | }
|
---|
| 2232 |
|
---|
| 2233 | endswitch:
|
---|
| 2234 | if (orc == CONFACK && /* Good CI */
|
---|
| 2235 | rc != CONFACK) /* but prior CI wasnt? */
|
---|
| 2236 | continue; /* Don't send this one */
|
---|
| 2237 |
|
---|
| 2238 | if (orc == CONFNAK) { /* Nak this CI? */
|
---|
| 2239 | if (reject_if_disagree /* Getting fed up with sending NAKs? */
|
---|
| 2240 | && citype != CI_MAGICNUMBER) {
|
---|
| 2241 | orc = CONFREJ; /* Get tough if so */
|
---|
| 2242 | } else {
|
---|
| 2243 | if (rc == CONFREJ) /* Rejecting prior CI? */
|
---|
| 2244 | continue; /* Don't send this one */
|
---|
| 2245 | rc = CONFNAK;
|
---|
| 2246 | }
|
---|
| 2247 | }
|
---|
| 2248 | if (orc == CONFREJ) { /* Reject this CI */
|
---|
| 2249 | rc = CONFREJ;
|
---|
| 2250 | if (cip != rejp) /* Need to move rejected CI? */
|
---|
| 2251 | MEMCPY(rejp, cip, cilen); /* Move it */
|
---|
| 2252 | INCPTR(cilen, rejp); /* Update output pointer */
|
---|
| 2253 | }
|
---|
| 2254 | }
|
---|
| 2255 |
|
---|
| 2256 | /*
|
---|
| 2257 | * If we wanted to send additional NAKs (for unsent CIs), the
|
---|
| 2258 | * code would go here. The extra NAKs would go at *nakoutp.
|
---|
| 2259 | * At present there are no cases where we want to ask the
|
---|
| 2260 | * peer to negotiate an option.
|
---|
| 2261 | */
|
---|
| 2262 |
|
---|
| 2263 | switch (rc) {
|
---|
| 2264 | case CONFACK:
|
---|
| 2265 | *lenp = next - inp;
|
---|
| 2266 | break;
|
---|
| 2267 | case CONFNAK:
|
---|
| 2268 | /*
|
---|
| 2269 | * Copy the Nak'd options from the nak buffer to the caller's buffer.
|
---|
| 2270 | */
|
---|
| 2271 | *lenp = nakoutp - (u_char*)nakp->payload;
|
---|
| 2272 | MEMCPY(inp, nakp->payload, *lenp);
|
---|
| 2273 | break;
|
---|
| 2274 | case CONFREJ:
|
---|
| 2275 | *lenp = rejp - inp;
|
---|
| 2276 | break;
|
---|
| 2277 | default:
|
---|
| 2278 | break;
|
---|
| 2279 | }
|
---|
| 2280 |
|
---|
| 2281 | pbuf_free(nakp);
|
---|
| 2282 | LCPDEBUG(("lcp_reqci: returning CONF%s.", CODENAME(rc)));
|
---|
| 2283 | return (rc); /* Return final code */
|
---|
| 2284 | }
|
---|
| 2285 |
|
---|
| 2286 |
|
---|
| 2287 | /*
|
---|
| 2288 | * lcp_up - LCP has come UP.
|
---|
| 2289 | */
|
---|
| 2290 | static void lcp_up(fsm *f) {
|
---|
| 2291 | ppp_pcb *pcb = f->pcb;
|
---|
| 2292 | lcp_options *wo = &pcb->lcp_wantoptions;
|
---|
| 2293 | lcp_options *ho = &pcb->lcp_hisoptions;
|
---|
| 2294 | lcp_options *go = &pcb->lcp_gotoptions;
|
---|
| 2295 | lcp_options *ao = &pcb->lcp_allowoptions;
|
---|
| 2296 | int mtu, mru;
|
---|
| 2297 |
|
---|
| 2298 | if (!go->neg_magicnumber)
|
---|
| 2299 | go->magicnumber = 0;
|
---|
| 2300 | if (!ho->neg_magicnumber)
|
---|
| 2301 | ho->magicnumber = 0;
|
---|
| 2302 |
|
---|
| 2303 | /*
|
---|
| 2304 | * Set our MTU to the smaller of the MTU we wanted and
|
---|
| 2305 | * the MRU our peer wanted. If we negotiated an MRU,
|
---|
| 2306 | * set our MRU to the larger of value we wanted and
|
---|
| 2307 | * the value we got in the negotiation.
|
---|
| 2308 | * Note on the MTU: the link MTU can be the MRU the peer wanted,
|
---|
| 2309 | * the interface MTU is set to the lowest of that, the
|
---|
| 2310 | * MTU we want to use, and our link MRU.
|
---|
| 2311 | */
|
---|
| 2312 | mtu = ho->neg_mru? ho->mru: PPP_MRU;
|
---|
| 2313 | mru = go->neg_mru? LWIP_MAX(wo->mru, go->mru): PPP_MRU;
|
---|
| 2314 | #ifdef HAVE_MULTILINK
|
---|
| 2315 | if (!(multilink && go->neg_mrru && ho->neg_mrru))
|
---|
| 2316 | #endif /* HAVE_MULTILINK */
|
---|
| 2317 | netif_set_mtu(pcb, LWIP_MIN(LWIP_MIN(mtu, mru), ao->mru));
|
---|
| 2318 | ppp_send_config(pcb, mtu,
|
---|
| 2319 | (ho->neg_asyncmap? ho->asyncmap: 0xffffffff),
|
---|
| 2320 | ho->neg_pcompression, ho->neg_accompression);
|
---|
| 2321 | ppp_recv_config(pcb, mru,
|
---|
| 2322 | (pcb->settings.lax_recv? 0: go->neg_asyncmap? go->asyncmap: 0xffffffff),
|
---|
| 2323 | go->neg_pcompression, go->neg_accompression);
|
---|
| 2324 |
|
---|
| 2325 | if (ho->neg_mru)
|
---|
| 2326 | pcb->peer_mru = ho->mru;
|
---|
| 2327 |
|
---|
| 2328 | lcp_echo_lowerup(f->pcb); /* Enable echo messages */
|
---|
| 2329 |
|
---|
| 2330 | link_established(pcb);
|
---|
| 2331 | }
|
---|
| 2332 |
|
---|
| 2333 |
|
---|
| 2334 | /*
|
---|
| 2335 | * lcp_down - LCP has gone DOWN.
|
---|
| 2336 | *
|
---|
| 2337 | * Alert other protocols.
|
---|
| 2338 | */
|
---|
| 2339 | static void lcp_down(fsm *f) {
|
---|
| 2340 | ppp_pcb *pcb = f->pcb;
|
---|
| 2341 | lcp_options *go = &pcb->lcp_gotoptions;
|
---|
| 2342 |
|
---|
| 2343 | lcp_echo_lowerdown(f->pcb);
|
---|
| 2344 |
|
---|
| 2345 | link_down(pcb);
|
---|
| 2346 |
|
---|
| 2347 | ppp_send_config(pcb, PPP_MRU, 0xffffffff, 0, 0);
|
---|
| 2348 | ppp_recv_config(pcb, PPP_MRU,
|
---|
| 2349 | (go->neg_asyncmap? go->asyncmap: 0xffffffff),
|
---|
| 2350 | go->neg_pcompression, go->neg_accompression);
|
---|
| 2351 | pcb->peer_mru = PPP_MRU;
|
---|
| 2352 | }
|
---|
| 2353 |
|
---|
| 2354 |
|
---|
| 2355 | /*
|
---|
| 2356 | * lcp_starting - LCP needs the lower layer up.
|
---|
| 2357 | */
|
---|
| 2358 | static void lcp_starting(fsm *f) {
|
---|
| 2359 | ppp_pcb *pcb = f->pcb;
|
---|
| 2360 | link_required(pcb);
|
---|
| 2361 | }
|
---|
| 2362 |
|
---|
| 2363 |
|
---|
| 2364 | /*
|
---|
| 2365 | * lcp_finished - LCP has finished with the lower layer.
|
---|
| 2366 | */
|
---|
| 2367 | static void lcp_finished(fsm *f) {
|
---|
| 2368 | ppp_pcb *pcb = f->pcb;
|
---|
| 2369 | link_terminated(pcb);
|
---|
| 2370 | }
|
---|
| 2371 |
|
---|
| 2372 |
|
---|
| 2373 | #if PRINTPKT_SUPPORT
|
---|
| 2374 | /*
|
---|
| 2375 | * lcp_printpkt - print the contents of an LCP packet.
|
---|
| 2376 | */
|
---|
| 2377 | static const char* const lcp_codenames[] = {
|
---|
| 2378 | "ConfReq", "ConfAck", "ConfNak", "ConfRej",
|
---|
| 2379 | "TermReq", "TermAck", "CodeRej", "ProtRej",
|
---|
| 2380 | "EchoReq", "EchoRep", "DiscReq", "Ident",
|
---|
| 2381 | "TimeRem"
|
---|
| 2382 | };
|
---|
| 2383 |
|
---|
| 2384 | static int lcp_printpkt(const u_char *p, int plen,
|
---|
| 2385 | void (*printer) (void *, const char *, ...), void *arg) {
|
---|
| 2386 | int code, id, len, olen, i;
|
---|
| 2387 | const u_char *pstart, *optend;
|
---|
| 2388 | u_short cishort;
|
---|
| 2389 | u32_t cilong;
|
---|
| 2390 |
|
---|
| 2391 | if (plen < HEADERLEN)
|
---|
| 2392 | return 0;
|
---|
| 2393 | pstart = p;
|
---|
| 2394 | GETCHAR(code, p);
|
---|
| 2395 | GETCHAR(id, p);
|
---|
| 2396 | GETSHORT(len, p);
|
---|
| 2397 | if (len < HEADERLEN || len > plen)
|
---|
| 2398 | return 0;
|
---|
| 2399 |
|
---|
| 2400 | if (code >= 1 && code <= (int)LWIP_ARRAYSIZE(lcp_codenames))
|
---|
| 2401 | printer(arg, " %s", lcp_codenames[code-1]);
|
---|
| 2402 | else
|
---|
| 2403 | printer(arg, " code=0x%x", code);
|
---|
| 2404 | printer(arg, " id=0x%x", id);
|
---|
| 2405 | len -= HEADERLEN;
|
---|
| 2406 | switch (code) {
|
---|
| 2407 | case CONFREQ:
|
---|
| 2408 | case CONFACK:
|
---|
| 2409 | case CONFNAK:
|
---|
| 2410 | case CONFREJ:
|
---|
| 2411 | /* print option list */
|
---|
| 2412 | while (len >= 2) {
|
---|
| 2413 | GETCHAR(code, p);
|
---|
| 2414 | GETCHAR(olen, p);
|
---|
| 2415 | p -= 2;
|
---|
| 2416 | if (olen < 2 || olen > len) {
|
---|
| 2417 | break;
|
---|
| 2418 | }
|
---|
| 2419 | printer(arg, " <");
|
---|
| 2420 | len -= olen;
|
---|
| 2421 | optend = p + olen;
|
---|
| 2422 | switch (code) {
|
---|
| 2423 | case CI_MRU:
|
---|
| 2424 | if (olen == CILEN_SHORT) {
|
---|
| 2425 | p += 2;
|
---|
| 2426 | GETSHORT(cishort, p);
|
---|
| 2427 | printer(arg, "mru %d", cishort);
|
---|
| 2428 | }
|
---|
| 2429 | break;
|
---|
| 2430 | case CI_ASYNCMAP:
|
---|
| 2431 | if (olen == CILEN_LONG) {
|
---|
| 2432 | p += 2;
|
---|
| 2433 | GETLONG(cilong, p);
|
---|
| 2434 | printer(arg, "asyncmap 0x%x", cilong);
|
---|
| 2435 | }
|
---|
| 2436 | break;
|
---|
| 2437 | case CI_AUTHTYPE:
|
---|
| 2438 | if (olen >= CILEN_SHORT) {
|
---|
| 2439 | p += 2;
|
---|
| 2440 | printer(arg, "auth ");
|
---|
| 2441 | GETSHORT(cishort, p);
|
---|
| 2442 | switch (cishort) {
|
---|
| 2443 | #if PAP_SUPPORT
|
---|
| 2444 | case PPP_PAP:
|
---|
| 2445 | printer(arg, "pap");
|
---|
| 2446 | break;
|
---|
| 2447 | #endif /* PAP_SUPPORT */
|
---|
| 2448 | #if CHAP_SUPPORT
|
---|
| 2449 | case PPP_CHAP:
|
---|
| 2450 | printer(arg, "chap");
|
---|
| 2451 | if (p < optend) {
|
---|
| 2452 | switch (*p) {
|
---|
| 2453 | case CHAP_MD5:
|
---|
| 2454 | printer(arg, " MD5");
|
---|
| 2455 | ++p;
|
---|
| 2456 | break;
|
---|
| 2457 | #if MSCHAP_SUPPORT
|
---|
| 2458 | case CHAP_MICROSOFT:
|
---|
| 2459 | printer(arg, " MS");
|
---|
| 2460 | ++p;
|
---|
| 2461 | break;
|
---|
| 2462 |
|
---|
| 2463 | case CHAP_MICROSOFT_V2:
|
---|
| 2464 | printer(arg, " MS-v2");
|
---|
| 2465 | ++p;
|
---|
| 2466 | break;
|
---|
| 2467 | #endif /* MSCHAP_SUPPORT */
|
---|
| 2468 | default:
|
---|
| 2469 | break;
|
---|
| 2470 | }
|
---|
| 2471 | }
|
---|
| 2472 | break;
|
---|
| 2473 | #endif /* CHAP_SUPPORT */
|
---|
| 2474 | #if EAP_SUPPORT
|
---|
| 2475 | case PPP_EAP:
|
---|
| 2476 | printer(arg, "eap");
|
---|
| 2477 | break;
|
---|
| 2478 | #endif /* EAP_SUPPORT */
|
---|
| 2479 | default:
|
---|
| 2480 | printer(arg, "0x%x", cishort);
|
---|
| 2481 | }
|
---|
| 2482 | }
|
---|
| 2483 | break;
|
---|
| 2484 | #if LQR_SUPPORT
|
---|
| 2485 | case CI_QUALITY:
|
---|
| 2486 | if (olen >= CILEN_SHORT) {
|
---|
| 2487 | p += 2;
|
---|
| 2488 | printer(arg, "quality ");
|
---|
| 2489 | GETSHORT(cishort, p);
|
---|
| 2490 | switch (cishort) {
|
---|
| 2491 | case PPP_LQR:
|
---|
| 2492 | printer(arg, "lqr");
|
---|
| 2493 | break;
|
---|
| 2494 | default:
|
---|
| 2495 | printer(arg, "0x%x", cishort);
|
---|
| 2496 | }
|
---|
| 2497 | }
|
---|
| 2498 | break;
|
---|
| 2499 | #endif /* LQR_SUPPORT */
|
---|
| 2500 | case CI_CALLBACK:
|
---|
| 2501 | if (olen >= CILEN_CHAR) {
|
---|
| 2502 | p += 2;
|
---|
| 2503 | printer(arg, "callback ");
|
---|
| 2504 | GETCHAR(cishort, p);
|
---|
| 2505 | switch (cishort) {
|
---|
| 2506 | case CBCP_OPT:
|
---|
| 2507 | printer(arg, "CBCP");
|
---|
| 2508 | break;
|
---|
| 2509 | default:
|
---|
| 2510 | printer(arg, "0x%x", cishort);
|
---|
| 2511 | }
|
---|
| 2512 | }
|
---|
| 2513 | break;
|
---|
| 2514 | case CI_MAGICNUMBER:
|
---|
| 2515 | if (olen == CILEN_LONG) {
|
---|
| 2516 | p += 2;
|
---|
| 2517 | GETLONG(cilong, p);
|
---|
| 2518 | printer(arg, "magic 0x%x", cilong);
|
---|
| 2519 | }
|
---|
| 2520 | break;
|
---|
| 2521 | case CI_PCOMPRESSION:
|
---|
| 2522 | if (olen == CILEN_VOID) {
|
---|
| 2523 | p += 2;
|
---|
| 2524 | printer(arg, "pcomp");
|
---|
| 2525 | }
|
---|
| 2526 | break;
|
---|
| 2527 | case CI_ACCOMPRESSION:
|
---|
| 2528 | if (olen == CILEN_VOID) {
|
---|
| 2529 | p += 2;
|
---|
| 2530 | printer(arg, "accomp");
|
---|
| 2531 | }
|
---|
| 2532 | break;
|
---|
| 2533 | case CI_MRRU:
|
---|
| 2534 | if (olen == CILEN_SHORT) {
|
---|
| 2535 | p += 2;
|
---|
| 2536 | GETSHORT(cishort, p);
|
---|
| 2537 | printer(arg, "mrru %d", cishort);
|
---|
| 2538 | }
|
---|
| 2539 | break;
|
---|
| 2540 | case CI_SSNHF:
|
---|
| 2541 | if (olen == CILEN_VOID) {
|
---|
| 2542 | p += 2;
|
---|
| 2543 | printer(arg, "ssnhf");
|
---|
| 2544 | }
|
---|
| 2545 | break;
|
---|
| 2546 | case CI_EPDISC:
|
---|
| 2547 | #ifdef HAVE_MULTILINK
|
---|
| 2548 | if (olen >= CILEN_CHAR) {
|
---|
| 2549 | struct epdisc epd;
|
---|
| 2550 | p += 2;
|
---|
| 2551 | GETCHAR(epd.class, p);
|
---|
| 2552 | epd.length = olen - CILEN_CHAR;
|
---|
| 2553 | if (epd.length > MAX_ENDP_LEN)
|
---|
| 2554 | epd.length = MAX_ENDP_LEN;
|
---|
| 2555 | if (epd.length > 0) {
|
---|
| 2556 | MEMCPY(epd.value, p, epd.length);
|
---|
| 2557 | p += epd.length;
|
---|
| 2558 | }
|
---|
| 2559 | printer(arg, "endpoint [%s]", epdisc_to_str(&epd));
|
---|
| 2560 | }
|
---|
| 2561 | #else
|
---|
| 2562 | printer(arg, "endpoint");
|
---|
| 2563 | #endif
|
---|
| 2564 | break;
|
---|
| 2565 | default:
|
---|
| 2566 | break;
|
---|
| 2567 | }
|
---|
| 2568 | while (p < optend) {
|
---|
| 2569 | GETCHAR(code, p);
|
---|
| 2570 | printer(arg, " %.2x", code);
|
---|
| 2571 | }
|
---|
| 2572 | printer(arg, ">");
|
---|
| 2573 | }
|
---|
| 2574 | break;
|
---|
| 2575 |
|
---|
| 2576 | case TERMACK:
|
---|
| 2577 | case TERMREQ:
|
---|
| 2578 | if (len > 0 && *p >= ' ' && *p < 0x7f) {
|
---|
| 2579 | printer(arg, " ");
|
---|
| 2580 | ppp_print_string(p, len, printer, arg);
|
---|
| 2581 | p += len;
|
---|
| 2582 | len = 0;
|
---|
| 2583 | }
|
---|
| 2584 | break;
|
---|
| 2585 |
|
---|
| 2586 | case ECHOREQ:
|
---|
| 2587 | case ECHOREP:
|
---|
| 2588 | case DISCREQ:
|
---|
| 2589 | if (len >= 4) {
|
---|
| 2590 | GETLONG(cilong, p);
|
---|
| 2591 | printer(arg, " magic=0x%x", cilong);
|
---|
| 2592 | len -= 4;
|
---|
| 2593 | }
|
---|
| 2594 | break;
|
---|
| 2595 |
|
---|
| 2596 | case IDENTIF:
|
---|
| 2597 | case TIMEREM:
|
---|
| 2598 | if (len >= 4) {
|
---|
| 2599 | GETLONG(cilong, p);
|
---|
| 2600 | printer(arg, " magic=0x%x", cilong);
|
---|
| 2601 | len -= 4;
|
---|
| 2602 | }
|
---|
| 2603 | if (code == TIMEREM) {
|
---|
| 2604 | if (len < 4)
|
---|
| 2605 | break;
|
---|
| 2606 | GETLONG(cilong, p);
|
---|
| 2607 | printer(arg, " seconds=%u", cilong);
|
---|
| 2608 | len -= 4;
|
---|
| 2609 | }
|
---|
| 2610 | if (len > 0) {
|
---|
| 2611 | printer(arg, " ");
|
---|
| 2612 | ppp_print_string(p, len, printer, arg);
|
---|
| 2613 | p += len;
|
---|
| 2614 | len = 0;
|
---|
| 2615 | }
|
---|
| 2616 | break;
|
---|
| 2617 | default:
|
---|
| 2618 | break;
|
---|
| 2619 | }
|
---|
| 2620 |
|
---|
| 2621 | /* print the rest of the bytes in the packet */
|
---|
| 2622 | for (i = 0; i < len && i < 32; ++i) {
|
---|
| 2623 | GETCHAR(code, p);
|
---|
| 2624 | printer(arg, " %.2x", code);
|
---|
| 2625 | }
|
---|
| 2626 | if (i < len) {
|
---|
| 2627 | printer(arg, " ...");
|
---|
| 2628 | p += len - i;
|
---|
| 2629 | }
|
---|
| 2630 |
|
---|
| 2631 | return p - pstart;
|
---|
| 2632 | }
|
---|
| 2633 | #endif /* PRINTPKT_SUPPORT */
|
---|
| 2634 |
|
---|
| 2635 | /*
|
---|
| 2636 | * Time to shut down the link because there is nothing out there.
|
---|
| 2637 | */
|
---|
| 2638 |
|
---|
| 2639 | static void LcpLinkFailure(fsm *f) {
|
---|
| 2640 | ppp_pcb *pcb = f->pcb;
|
---|
| 2641 | if (f->state == PPP_FSM_OPENED) {
|
---|
| 2642 | ppp_info("No response to %d echo-requests", pcb->lcp_echos_pending);
|
---|
| 2643 | ppp_notice("Serial link appears to be disconnected.");
|
---|
| 2644 | pcb->err_code = PPPERR_PEERDEAD;
|
---|
| 2645 | lcp_close(pcb, "Peer not responding");
|
---|
| 2646 | }
|
---|
| 2647 | }
|
---|
| 2648 |
|
---|
| 2649 | /*
|
---|
| 2650 | * Timer expired for the LCP echo requests from this process.
|
---|
| 2651 | */
|
---|
| 2652 |
|
---|
| 2653 | static void LcpEchoCheck(fsm *f) {
|
---|
| 2654 | ppp_pcb *pcb = f->pcb;
|
---|
| 2655 |
|
---|
| 2656 | LcpSendEchoRequest (f);
|
---|
| 2657 | if (f->state != PPP_FSM_OPENED)
|
---|
| 2658 | return;
|
---|
| 2659 |
|
---|
| 2660 | /*
|
---|
| 2661 | * Start the timer for the next interval.
|
---|
| 2662 | */
|
---|
| 2663 | if (pcb->lcp_echo_timer_running)
|
---|
| 2664 | ppp_warn("assertion lcp_echo_timer_running==0 failed");
|
---|
| 2665 | TIMEOUT (LcpEchoTimeout, f, pcb->settings.lcp_echo_interval);
|
---|
| 2666 | pcb->lcp_echo_timer_running = 1;
|
---|
| 2667 | }
|
---|
| 2668 |
|
---|
| 2669 | /*
|
---|
| 2670 | * LcpEchoTimeout - Timer expired on the LCP echo
|
---|
| 2671 | */
|
---|
| 2672 |
|
---|
| 2673 | static void LcpEchoTimeout(void *arg) {
|
---|
| 2674 | fsm *f = (fsm*)arg;
|
---|
| 2675 | ppp_pcb *pcb = f->pcb;
|
---|
| 2676 | if (pcb->lcp_echo_timer_running != 0) {
|
---|
| 2677 | pcb->lcp_echo_timer_running = 0;
|
---|
| 2678 | LcpEchoCheck ((fsm *) arg);
|
---|
| 2679 | }
|
---|
| 2680 | }
|
---|
| 2681 |
|
---|
| 2682 | /*
|
---|
| 2683 | * LcpEchoReply - LCP has received a reply to the echo
|
---|
| 2684 | */
|
---|
| 2685 |
|
---|
| 2686 | static void lcp_received_echo_reply(fsm *f, int id, u_char *inp, int len) {
|
---|
| 2687 | ppp_pcb *pcb = f->pcb;
|
---|
| 2688 | lcp_options *go = &pcb->lcp_gotoptions;
|
---|
| 2689 | u32_t magic_val;
|
---|
| 2690 | LWIP_UNUSED_ARG(id);
|
---|
| 2691 |
|
---|
| 2692 | /* Check the magic number - don't count replies from ourselves. */
|
---|
| 2693 | if (len < 4) {
|
---|
| 2694 | ppp_dbglog("lcp: received short Echo-Reply, length %d", len);
|
---|
| 2695 | return;
|
---|
| 2696 | }
|
---|
| 2697 | GETLONG(magic_val, inp);
|
---|
| 2698 | if (go->neg_magicnumber
|
---|
| 2699 | && magic_val == go->magicnumber) {
|
---|
| 2700 | ppp_warn("appear to have received our own echo-reply!");
|
---|
| 2701 | return;
|
---|
| 2702 | }
|
---|
| 2703 |
|
---|
| 2704 | /* Reset the number of outstanding echo frames */
|
---|
| 2705 | pcb->lcp_echos_pending = 0;
|
---|
| 2706 | }
|
---|
| 2707 |
|
---|
| 2708 | /*
|
---|
| 2709 | * LcpSendEchoRequest - Send an echo request frame to the peer
|
---|
| 2710 | */
|
---|
| 2711 |
|
---|
| 2712 | static void LcpSendEchoRequest(fsm *f) {
|
---|
| 2713 | ppp_pcb *pcb = f->pcb;
|
---|
| 2714 | lcp_options *go = &pcb->lcp_gotoptions;
|
---|
| 2715 | u32_t lcp_magic;
|
---|
| 2716 | u_char pkt[4], *pktp;
|
---|
| 2717 |
|
---|
| 2718 | /*
|
---|
| 2719 | * Detect the failure of the peer at this point.
|
---|
| 2720 | */
|
---|
| 2721 | if (pcb->settings.lcp_echo_fails != 0) {
|
---|
| 2722 | if (pcb->lcp_echos_pending >= pcb->settings.lcp_echo_fails) {
|
---|
| 2723 | LcpLinkFailure(f);
|
---|
| 2724 | pcb->lcp_echos_pending = 0;
|
---|
| 2725 | }
|
---|
| 2726 | }
|
---|
| 2727 |
|
---|
| 2728 | #if PPP_LCP_ADAPTIVE
|
---|
| 2729 | /*
|
---|
| 2730 | * If adaptive echos have been enabled, only send the echo request if
|
---|
| 2731 | * no traffic was received since the last one.
|
---|
| 2732 | */
|
---|
| 2733 | if (pcb->settings.lcp_echo_adaptive) {
|
---|
| 2734 | static unsigned int last_pkts_in = 0;
|
---|
| 2735 |
|
---|
| 2736 | #if PPP_STATS_SUPPORT
|
---|
| 2737 | update_link_stats(f->unit);
|
---|
| 2738 | link_stats_valid = 0;
|
---|
| 2739 | #endif /* PPP_STATS_SUPPORT */
|
---|
| 2740 |
|
---|
| 2741 | if (link_stats.pkts_in != last_pkts_in) {
|
---|
| 2742 | last_pkts_in = link_stats.pkts_in;
|
---|
| 2743 | return;
|
---|
| 2744 | }
|
---|
| 2745 | }
|
---|
| 2746 | #endif
|
---|
| 2747 |
|
---|
| 2748 | /*
|
---|
| 2749 | * Make and send the echo request frame.
|
---|
| 2750 | */
|
---|
| 2751 | if (f->state == PPP_FSM_OPENED) {
|
---|
| 2752 | lcp_magic = go->magicnumber;
|
---|
| 2753 | pktp = pkt;
|
---|
| 2754 | PUTLONG(lcp_magic, pktp);
|
---|
| 2755 | fsm_sdata(f, ECHOREQ, pcb->lcp_echo_number++, pkt, pktp - pkt);
|
---|
| 2756 | ++pcb->lcp_echos_pending;
|
---|
| 2757 | }
|
---|
| 2758 | }
|
---|
| 2759 |
|
---|
| 2760 | /*
|
---|
| 2761 | * lcp_echo_lowerup - Start the timer for the LCP frame
|
---|
| 2762 | */
|
---|
| 2763 |
|
---|
| 2764 | static void lcp_echo_lowerup(ppp_pcb *pcb) {
|
---|
| 2765 | fsm *f = &pcb->lcp_fsm;
|
---|
| 2766 |
|
---|
| 2767 | /* Clear the parameters for generating echo frames */
|
---|
| 2768 | pcb->lcp_echos_pending = 0;
|
---|
| 2769 | pcb->lcp_echo_number = 0;
|
---|
| 2770 | pcb->lcp_echo_timer_running = 0;
|
---|
| 2771 |
|
---|
| 2772 | /* If a timeout interval is specified then start the timer */
|
---|
| 2773 | if (pcb->settings.lcp_echo_interval != 0)
|
---|
| 2774 | LcpEchoCheck (f);
|
---|
| 2775 | }
|
---|
| 2776 |
|
---|
| 2777 | /*
|
---|
| 2778 | * lcp_echo_lowerdown - Stop the timer for the LCP frame
|
---|
| 2779 | */
|
---|
| 2780 |
|
---|
| 2781 | static void lcp_echo_lowerdown(ppp_pcb *pcb) {
|
---|
| 2782 | fsm *f = &pcb->lcp_fsm;
|
---|
| 2783 |
|
---|
| 2784 | if (pcb->lcp_echo_timer_running != 0) {
|
---|
| 2785 | UNTIMEOUT (LcpEchoTimeout, f);
|
---|
| 2786 | pcb->lcp_echo_timer_running = 0;
|
---|
| 2787 | }
|
---|
| 2788 | }
|
---|
| 2789 |
|
---|
| 2790 | #endif /* PPP_SUPPORT */
|
---|