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lwip/netif/ppp/pap.c@0:d7bd7384a37c, 2016-12-07 (annotated)

Committer:
grzemich
Date:
Wed Dec 07 23:47:50 2016 +0000
Revision:
0:d7bd7384a37c
dgd

Who changed what in which revision?

UserRevisionLine numberNew contents of line
grzemich 0:d7bd7384a37c 1 /*****************************************************************************
grzemich 0:d7bd7384a37c 2 * pap.c - Network Password Authentication Protocol program file.
grzemich 0:d7bd7384a37c 3 *
grzemich 0:d7bd7384a37c 4 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
grzemich 0:d7bd7384a37c 5 * portions Copyright (c) 1997 by Global Election Systems Inc.
grzemich 0:d7bd7384a37c 6 *
grzemich 0:d7bd7384a37c 7 * The authors hereby grant permission to use, copy, modify, distribute,
grzemich 0:d7bd7384a37c 8 * and license this software and its documentation for any purpose, provided
grzemich 0:d7bd7384a37c 9 * that existing copyright notices are retained in all copies and that this
grzemich 0:d7bd7384a37c 10 * notice and the following disclaimer are included verbatim in any
grzemich 0:d7bd7384a37c 11 * distributions. No written agreement, license, or royalty fee is required
grzemich 0:d7bd7384a37c 12 * for any of the authorized uses.
grzemich 0:d7bd7384a37c 13 *
grzemich 0:d7bd7384a37c 14 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
grzemich 0:d7bd7384a37c 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
grzemich 0:d7bd7384a37c 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
grzemich 0:d7bd7384a37c 17 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
grzemich 0:d7bd7384a37c 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
grzemich 0:d7bd7384a37c 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
grzemich 0:d7bd7384a37c 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
grzemich 0:d7bd7384a37c 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
grzemich 0:d7bd7384a37c 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
grzemich 0:d7bd7384a37c 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
grzemich 0:d7bd7384a37c 24 *
grzemich 0:d7bd7384a37c 25 ******************************************************************************
grzemich 0:d7bd7384a37c 26 * REVISION HISTORY
grzemich 0:d7bd7384a37c 27 *
grzemich 0:d7bd7384a37c 28 * 03-01-01 Marc Boucher <marc@mbsi.ca>
grzemich 0:d7bd7384a37c 29 * Ported to lwIP.
grzemich 0:d7bd7384a37c 30 * 97-12-12 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
grzemich 0:d7bd7384a37c 31 * Original.
grzemich 0:d7bd7384a37c 32 *****************************************************************************/
grzemich 0:d7bd7384a37c 33 /*
grzemich 0:d7bd7384a37c 34 * upap.c - User/Password Authentication Protocol.
grzemich 0:d7bd7384a37c 35 *
grzemich 0:d7bd7384a37c 36 * Copyright (c) 1989 Carnegie Mellon University.
grzemich 0:d7bd7384a37c 37 * All rights reserved.
grzemich 0:d7bd7384a37c 38 *
grzemich 0:d7bd7384a37c 39 * Redistribution and use in source and binary forms are permitted
grzemich 0:d7bd7384a37c 40 * provided that the above copyright notice and this paragraph are
grzemich 0:d7bd7384a37c 41 * duplicated in all such forms and that any documentation,
grzemich 0:d7bd7384a37c 42 * advertising materials, and other materials related to such
grzemich 0:d7bd7384a37c 43 * distribution and use acknowledge that the software was developed
grzemich 0:d7bd7384a37c 44 * by Carnegie Mellon University. The name of the
grzemich 0:d7bd7384a37c 45 * University may not be used to endorse or promote products derived
grzemich 0:d7bd7384a37c 46 * from this software without specific prior written permission.
grzemich 0:d7bd7384a37c 47 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
grzemich 0:d7bd7384a37c 48 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
grzemich 0:d7bd7384a37c 49 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
grzemich 0:d7bd7384a37c 50 */
grzemich 0:d7bd7384a37c 51
grzemich 0:d7bd7384a37c 52 #include "lwip/opt.h"
grzemich 0:d7bd7384a37c 53
grzemich 0:d7bd7384a37c 54 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
grzemich 0:d7bd7384a37c 55
grzemich 0:d7bd7384a37c 56 #if PAP_SUPPORT /* don't build if not configured for use in lwipopts.h */
grzemich 0:d7bd7384a37c 57
grzemich 0:d7bd7384a37c 58 #include "ppp.h"
grzemich 0:d7bd7384a37c 59 #include "pppdebug.h"
grzemich 0:d7bd7384a37c 60
grzemich 0:d7bd7384a37c 61 #include "auth.h"
grzemich 0:d7bd7384a37c 62 #include "pap.h"
grzemich 0:d7bd7384a37c 63
grzemich 0:d7bd7384a37c 64 #include <string.h>
grzemich 0:d7bd7384a37c 65
grzemich 0:d7bd7384a37c 66 #if 0 /* UNUSED */
grzemich 0:d7bd7384a37c 67 static bool hide_password = 1;
grzemich 0:d7bd7384a37c 68
grzemich 0:d7bd7384a37c 69 /*
grzemich 0:d7bd7384a37c 70 * Command-line options.
grzemich 0:d7bd7384a37c 71 */
grzemich 0:d7bd7384a37c 72 static option_t pap_option_list[] = {
grzemich 0:d7bd7384a37c 73 { "hide-password", o_bool, &hide_password,
grzemich 0:d7bd7384a37c 74 "Don't output passwords to log", 1 },
grzemich 0:d7bd7384a37c 75 { "show-password", o_bool, &hide_password,
grzemich 0:d7bd7384a37c 76 "Show password string in debug log messages", 0 },
grzemich 0:d7bd7384a37c 77 { "pap-restart", o_int, &upap[0].us_timeouttime,
grzemich 0:d7bd7384a37c 78 "Set retransmit timeout for PAP" },
grzemich 0:d7bd7384a37c 79 { "pap-max-authreq", o_int, &upap[0].us_maxtransmits,
grzemich 0:d7bd7384a37c 80 "Set max number of transmissions for auth-reqs" },
grzemich 0:d7bd7384a37c 81 { "pap-timeout", o_int, &upap[0].us_reqtimeout,
grzemich 0:d7bd7384a37c 82 "Set time limit for peer PAP authentication" },
grzemich 0:d7bd7384a37c 83 { NULL }
grzemich 0:d7bd7384a37c 84 };
grzemich 0:d7bd7384a37c 85 #endif
grzemich 0:d7bd7384a37c 86
grzemich 0:d7bd7384a37c 87 /*
grzemich 0:d7bd7384a37c 88 * Protocol entry points.
grzemich 0:d7bd7384a37c 89 */
grzemich 0:d7bd7384a37c 90 static void upap_init (int);
grzemich 0:d7bd7384a37c 91 static void upap_lowerup (int);
grzemich 0:d7bd7384a37c 92 static void upap_lowerdown (int);
grzemich 0:d7bd7384a37c 93 static void upap_input (int, u_char *, int);
grzemich 0:d7bd7384a37c 94 static void upap_protrej (int);
grzemich 0:d7bd7384a37c 95 #if PPP_ADDITIONAL_CALLBACKS
grzemich 0:d7bd7384a37c 96 static int upap_printpkt (u_char *, int, void (*)(void *, char *, ...), void *);
grzemich 0:d7bd7384a37c 97 #endif /* PPP_ADDITIONAL_CALLBACKS */
grzemich 0:d7bd7384a37c 98
grzemich 0:d7bd7384a37c 99 struct protent pap_protent = {
grzemich 0:d7bd7384a37c 100 PPP_PAP,
grzemich 0:d7bd7384a37c 101 upap_init,
grzemich 0:d7bd7384a37c 102 upap_input,
grzemich 0:d7bd7384a37c 103 upap_protrej,
grzemich 0:d7bd7384a37c 104 upap_lowerup,
grzemich 0:d7bd7384a37c 105 upap_lowerdown,
grzemich 0:d7bd7384a37c 106 NULL,
grzemich 0:d7bd7384a37c 107 NULL,
grzemich 0:d7bd7384a37c 108 #if PPP_ADDITIONAL_CALLBACKS
grzemich 0:d7bd7384a37c 109 upap_printpkt,
grzemich 0:d7bd7384a37c 110 NULL,
grzemich 0:d7bd7384a37c 111 #endif /* PPP_ADDITIONAL_CALLBACKS */
grzemich 0:d7bd7384a37c 112 1,
grzemich 0:d7bd7384a37c 113 "PAP",
grzemich 0:d7bd7384a37c 114 #if PPP_ADDITIONAL_CALLBACKS
grzemich 0:d7bd7384a37c 115 NULL,
grzemich 0:d7bd7384a37c 116 NULL,
grzemich 0:d7bd7384a37c 117 NULL
grzemich 0:d7bd7384a37c 118 #endif /* PPP_ADDITIONAL_CALLBACKS */
grzemich 0:d7bd7384a37c 119 };
grzemich 0:d7bd7384a37c 120
grzemich 0:d7bd7384a37c 121 upap_state upap[NUM_PPP]; /* UPAP state; one for each unit */
grzemich 0:d7bd7384a37c 122
grzemich 0:d7bd7384a37c 123 static void upap_timeout (void *);
grzemich 0:d7bd7384a37c 124 static void upap_reqtimeout(void *);
grzemich 0:d7bd7384a37c 125 static void upap_rauthreq (upap_state *, u_char *, u_char, int);
grzemich 0:d7bd7384a37c 126 static void upap_rauthack (upap_state *, u_char *, int, int);
grzemich 0:d7bd7384a37c 127 static void upap_rauthnak (upap_state *, u_char *, int, int);
grzemich 0:d7bd7384a37c 128 static void upap_sauthreq (upap_state *);
grzemich 0:d7bd7384a37c 129 static void upap_sresp (upap_state *, u_char, u_char, char *, int);
grzemich 0:d7bd7384a37c 130
grzemich 0:d7bd7384a37c 131
grzemich 0:d7bd7384a37c 132 /*
grzemich 0:d7bd7384a37c 133 * upap_init - Initialize a UPAP unit.
grzemich 0:d7bd7384a37c 134 */
grzemich 0:d7bd7384a37c 135 static void
grzemich 0:d7bd7384a37c 136 upap_init(int unit)
grzemich 0:d7bd7384a37c 137 {
grzemich 0:d7bd7384a37c 138 upap_state *u = &upap[unit];
grzemich 0:d7bd7384a37c 139
grzemich 0:d7bd7384a37c 140 UPAPDEBUG(LOG_INFO, ("upap_init: %d\n", unit));
grzemich 0:d7bd7384a37c 141 u->us_unit = unit;
grzemich 0:d7bd7384a37c 142 u->us_user = NULL;
grzemich 0:d7bd7384a37c 143 u->us_userlen = 0;
grzemich 0:d7bd7384a37c 144 u->us_passwd = NULL;
grzemich 0:d7bd7384a37c 145 u->us_passwdlen = 0;
grzemich 0:d7bd7384a37c 146 u->us_clientstate = UPAPCS_INITIAL;
grzemich 0:d7bd7384a37c 147 u->us_serverstate = UPAPSS_INITIAL;
grzemich 0:d7bd7384a37c 148 u->us_id = 0;
grzemich 0:d7bd7384a37c 149 u->us_timeouttime = UPAP_DEFTIMEOUT;
grzemich 0:d7bd7384a37c 150 u->us_maxtransmits = 10;
grzemich 0:d7bd7384a37c 151 u->us_reqtimeout = UPAP_DEFREQTIME;
grzemich 0:d7bd7384a37c 152 }
grzemich 0:d7bd7384a37c 153
grzemich 0:d7bd7384a37c 154 /*
grzemich 0:d7bd7384a37c 155 * upap_authwithpeer - Authenticate us with our peer (start client).
grzemich 0:d7bd7384a37c 156 *
grzemich 0:d7bd7384a37c 157 * Set new state and send authenticate's.
grzemich 0:d7bd7384a37c 158 */
grzemich 0:d7bd7384a37c 159 void
grzemich 0:d7bd7384a37c 160 upap_authwithpeer(int unit, char *user, char *password)
grzemich 0:d7bd7384a37c 161 {
grzemich 0:d7bd7384a37c 162 upap_state *u = &upap[unit];
grzemich 0:d7bd7384a37c 163
grzemich 0:d7bd7384a37c 164 UPAPDEBUG(LOG_INFO, ("upap_authwithpeer: %d user=%s password=%s s=%d\n",
grzemich 0:d7bd7384a37c 165 unit, user, password, u->us_clientstate));
grzemich 0:d7bd7384a37c 166
grzemich 0:d7bd7384a37c 167 /* Save the username and password we're given */
grzemich 0:d7bd7384a37c 168 u->us_user = user;
grzemich 0:d7bd7384a37c 169 u->us_userlen = (int)strlen(user);
grzemich 0:d7bd7384a37c 170 u->us_passwd = password;
grzemich 0:d7bd7384a37c 171 u->us_passwdlen = (int)strlen(password);
grzemich 0:d7bd7384a37c 172
grzemich 0:d7bd7384a37c 173 u->us_transmits = 0;
grzemich 0:d7bd7384a37c 174
grzemich 0:d7bd7384a37c 175 /* Lower layer up yet? */
grzemich 0:d7bd7384a37c 176 if (u->us_clientstate == UPAPCS_INITIAL ||
grzemich 0:d7bd7384a37c 177 u->us_clientstate == UPAPCS_PENDING) {
grzemich 0:d7bd7384a37c 178 u->us_clientstate = UPAPCS_PENDING;
grzemich 0:d7bd7384a37c 179 return;
grzemich 0:d7bd7384a37c 180 }
grzemich 0:d7bd7384a37c 181
grzemich 0:d7bd7384a37c 182 upap_sauthreq(u); /* Start protocol */
grzemich 0:d7bd7384a37c 183 }
grzemich 0:d7bd7384a37c 184
grzemich 0:d7bd7384a37c 185
grzemich 0:d7bd7384a37c 186 /*
grzemich 0:d7bd7384a37c 187 * upap_authpeer - Authenticate our peer (start server).
grzemich 0:d7bd7384a37c 188 *
grzemich 0:d7bd7384a37c 189 * Set new state.
grzemich 0:d7bd7384a37c 190 */
grzemich 0:d7bd7384a37c 191 void
grzemich 0:d7bd7384a37c 192 upap_authpeer(int unit)
grzemich 0:d7bd7384a37c 193 {
grzemich 0:d7bd7384a37c 194 upap_state *u = &upap[unit];
grzemich 0:d7bd7384a37c 195
grzemich 0:d7bd7384a37c 196 /* Lower layer up yet? */
grzemich 0:d7bd7384a37c 197 if (u->us_serverstate == UPAPSS_INITIAL ||
grzemich 0:d7bd7384a37c 198 u->us_serverstate == UPAPSS_PENDING) {
grzemich 0:d7bd7384a37c 199 u->us_serverstate = UPAPSS_PENDING;
grzemich 0:d7bd7384a37c 200 return;
grzemich 0:d7bd7384a37c 201 }
grzemich 0:d7bd7384a37c 202
grzemich 0:d7bd7384a37c 203 u->us_serverstate = UPAPSS_LISTEN;
grzemich 0:d7bd7384a37c 204 if (u->us_reqtimeout > 0) {
grzemich 0:d7bd7384a37c 205 TIMEOUT(upap_reqtimeout, u, u->us_reqtimeout);
grzemich 0:d7bd7384a37c 206 }
grzemich 0:d7bd7384a37c 207 }
grzemich 0:d7bd7384a37c 208
grzemich 0:d7bd7384a37c 209 /*
grzemich 0:d7bd7384a37c 210 * upap_timeout - Retransmission timer for sending auth-reqs expired.
grzemich 0:d7bd7384a37c 211 */
grzemich 0:d7bd7384a37c 212 static void
grzemich 0:d7bd7384a37c 213 upap_timeout(void *arg)
grzemich 0:d7bd7384a37c 214 {
grzemich 0:d7bd7384a37c 215 upap_state *u = (upap_state *) arg;
grzemich 0:d7bd7384a37c 216
grzemich 0:d7bd7384a37c 217 UPAPDEBUG(LOG_INFO, ("upap_timeout: %d timeout %d expired s=%d\n",
grzemich 0:d7bd7384a37c 218 u->us_unit, u->us_timeouttime, u->us_clientstate));
grzemich 0:d7bd7384a37c 219
grzemich 0:d7bd7384a37c 220 if (u->us_clientstate != UPAPCS_AUTHREQ) {
grzemich 0:d7bd7384a37c 221 UPAPDEBUG(LOG_INFO, ("upap_timeout: not in AUTHREQ state!\n"));
grzemich 0:d7bd7384a37c 222 return;
grzemich 0:d7bd7384a37c 223 }
grzemich 0:d7bd7384a37c 224
grzemich 0:d7bd7384a37c 225 if (u->us_transmits >= u->us_maxtransmits) {
grzemich 0:d7bd7384a37c 226 /* give up in disgust */
grzemich 0:d7bd7384a37c 227 UPAPDEBUG(LOG_ERR, ("No response to PAP authenticate-requests\n"));
grzemich 0:d7bd7384a37c 228 u->us_clientstate = UPAPCS_BADAUTH;
grzemich 0:d7bd7384a37c 229 auth_withpeer_fail(u->us_unit, PPP_PAP);
grzemich 0:d7bd7384a37c 230 return;
grzemich 0:d7bd7384a37c 231 }
grzemich 0:d7bd7384a37c 232
grzemich 0:d7bd7384a37c 233 upap_sauthreq(u); /* Send Authenticate-Request and set upap timeout*/
grzemich 0:d7bd7384a37c 234 }
grzemich 0:d7bd7384a37c 235
grzemich 0:d7bd7384a37c 236
grzemich 0:d7bd7384a37c 237 /*
grzemich 0:d7bd7384a37c 238 * upap_reqtimeout - Give up waiting for the peer to send an auth-req.
grzemich 0:d7bd7384a37c 239 */
grzemich 0:d7bd7384a37c 240 static void
grzemich 0:d7bd7384a37c 241 upap_reqtimeout(void *arg)
grzemich 0:d7bd7384a37c 242 {
grzemich 0:d7bd7384a37c 243 upap_state *u = (upap_state *) arg;
grzemich 0:d7bd7384a37c 244
grzemich 0:d7bd7384a37c 245 if (u->us_serverstate != UPAPSS_LISTEN) {
grzemich 0:d7bd7384a37c 246 return; /* huh?? */
grzemich 0:d7bd7384a37c 247 }
grzemich 0:d7bd7384a37c 248
grzemich 0:d7bd7384a37c 249 auth_peer_fail(u->us_unit, PPP_PAP);
grzemich 0:d7bd7384a37c 250 u->us_serverstate = UPAPSS_BADAUTH;
grzemich 0:d7bd7384a37c 251 }
grzemich 0:d7bd7384a37c 252
grzemich 0:d7bd7384a37c 253
grzemich 0:d7bd7384a37c 254 /*
grzemich 0:d7bd7384a37c 255 * upap_lowerup - The lower layer is up.
grzemich 0:d7bd7384a37c 256 *
grzemich 0:d7bd7384a37c 257 * Start authenticating if pending.
grzemich 0:d7bd7384a37c 258 */
grzemich 0:d7bd7384a37c 259 static void
grzemich 0:d7bd7384a37c 260 upap_lowerup(int unit)
grzemich 0:d7bd7384a37c 261 {
grzemich 0:d7bd7384a37c 262 upap_state *u = &upap[unit];
grzemich 0:d7bd7384a37c 263
grzemich 0:d7bd7384a37c 264 UPAPDEBUG(LOG_INFO, ("upap_lowerup: init %d clientstate s=%d\n", unit, u->us_clientstate));
grzemich 0:d7bd7384a37c 265
grzemich 0:d7bd7384a37c 266 if (u->us_clientstate == UPAPCS_INITIAL) {
grzemich 0:d7bd7384a37c 267 u->us_clientstate = UPAPCS_CLOSED;
grzemich 0:d7bd7384a37c 268 } else if (u->us_clientstate == UPAPCS_PENDING) {
grzemich 0:d7bd7384a37c 269 upap_sauthreq(u); /* send an auth-request */
grzemich 0:d7bd7384a37c 270 /* now client state is UPAPCS__AUTHREQ */
grzemich 0:d7bd7384a37c 271 }
grzemich 0:d7bd7384a37c 272
grzemich 0:d7bd7384a37c 273 if (u->us_serverstate == UPAPSS_INITIAL) {
grzemich 0:d7bd7384a37c 274 u->us_serverstate = UPAPSS_CLOSED;
grzemich 0:d7bd7384a37c 275 } else if (u->us_serverstate == UPAPSS_PENDING) {
grzemich 0:d7bd7384a37c 276 u->us_serverstate = UPAPSS_LISTEN;
grzemich 0:d7bd7384a37c 277 if (u->us_reqtimeout > 0) {
grzemich 0:d7bd7384a37c 278 TIMEOUT(upap_reqtimeout, u, u->us_reqtimeout);
grzemich 0:d7bd7384a37c 279 }
grzemich 0:d7bd7384a37c 280 }
grzemich 0:d7bd7384a37c 281 }
grzemich 0:d7bd7384a37c 282
grzemich 0:d7bd7384a37c 283
grzemich 0:d7bd7384a37c 284 /*
grzemich 0:d7bd7384a37c 285 * upap_lowerdown - The lower layer is down.
grzemich 0:d7bd7384a37c 286 *
grzemich 0:d7bd7384a37c 287 * Cancel all timeouts.
grzemich 0:d7bd7384a37c 288 */
grzemich 0:d7bd7384a37c 289 static void
grzemich 0:d7bd7384a37c 290 upap_lowerdown(int unit)
grzemich 0:d7bd7384a37c 291 {
grzemich 0:d7bd7384a37c 292 upap_state *u = &upap[unit];
grzemich 0:d7bd7384a37c 293
grzemich 0:d7bd7384a37c 294 UPAPDEBUG(LOG_INFO, ("upap_lowerdown: %d s=%d\n", unit, u->us_clientstate));
grzemich 0:d7bd7384a37c 295
grzemich 0:d7bd7384a37c 296 if (u->us_clientstate == UPAPCS_AUTHREQ) { /* Timeout pending? */
grzemich 0:d7bd7384a37c 297 UNTIMEOUT(upap_timeout, u); /* Cancel timeout */
grzemich 0:d7bd7384a37c 298 }
grzemich 0:d7bd7384a37c 299 if (u->us_serverstate == UPAPSS_LISTEN && u->us_reqtimeout > 0) {
grzemich 0:d7bd7384a37c 300 UNTIMEOUT(upap_reqtimeout, u);
grzemich 0:d7bd7384a37c 301 }
grzemich 0:d7bd7384a37c 302
grzemich 0:d7bd7384a37c 303 u->us_clientstate = UPAPCS_INITIAL;
grzemich 0:d7bd7384a37c 304 u->us_serverstate = UPAPSS_INITIAL;
grzemich 0:d7bd7384a37c 305 }
grzemich 0:d7bd7384a37c 306
grzemich 0:d7bd7384a37c 307
grzemich 0:d7bd7384a37c 308 /*
grzemich 0:d7bd7384a37c 309 * upap_protrej - Peer doesn't speak this protocol.
grzemich 0:d7bd7384a37c 310 *
grzemich 0:d7bd7384a37c 311 * This shouldn't happen. In any case, pretend lower layer went down.
grzemich 0:d7bd7384a37c 312 */
grzemich 0:d7bd7384a37c 313 static void
grzemich 0:d7bd7384a37c 314 upap_protrej(int unit)
grzemich 0:d7bd7384a37c 315 {
grzemich 0:d7bd7384a37c 316 upap_state *u = &upap[unit];
grzemich 0:d7bd7384a37c 317
grzemich 0:d7bd7384a37c 318 if (u->us_clientstate == UPAPCS_AUTHREQ) {
grzemich 0:d7bd7384a37c 319 UPAPDEBUG(LOG_ERR, ("PAP authentication failed due to protocol-reject\n"));
grzemich 0:d7bd7384a37c 320 auth_withpeer_fail(unit, PPP_PAP);
grzemich 0:d7bd7384a37c 321 }
grzemich 0:d7bd7384a37c 322 if (u->us_serverstate == UPAPSS_LISTEN) {
grzemich 0:d7bd7384a37c 323 UPAPDEBUG(LOG_ERR, ("PAP authentication of peer failed (protocol-reject)\n"));
grzemich 0:d7bd7384a37c 324 auth_peer_fail(unit, PPP_PAP);
grzemich 0:d7bd7384a37c 325 }
grzemich 0:d7bd7384a37c 326 upap_lowerdown(unit);
grzemich 0:d7bd7384a37c 327 }
grzemich 0:d7bd7384a37c 328
grzemich 0:d7bd7384a37c 329
grzemich 0:d7bd7384a37c 330 /*
grzemich 0:d7bd7384a37c 331 * upap_input - Input UPAP packet.
grzemich 0:d7bd7384a37c 332 */
grzemich 0:d7bd7384a37c 333 static void
grzemich 0:d7bd7384a37c 334 upap_input(int unit, u_char *inpacket, int l)
grzemich 0:d7bd7384a37c 335 {
grzemich 0:d7bd7384a37c 336 upap_state *u = &upap[unit];
grzemich 0:d7bd7384a37c 337 u_char *inp;
grzemich 0:d7bd7384a37c 338 u_char code, id;
grzemich 0:d7bd7384a37c 339 int len;
grzemich 0:d7bd7384a37c 340
grzemich 0:d7bd7384a37c 341 /*
grzemich 0:d7bd7384a37c 342 * Parse header (code, id and length).
grzemich 0:d7bd7384a37c 343 * If packet too short, drop it.
grzemich 0:d7bd7384a37c 344 */
grzemich 0:d7bd7384a37c 345 inp = inpacket;
grzemich 0:d7bd7384a37c 346 if (l < (int)UPAP_HEADERLEN) {
grzemich 0:d7bd7384a37c 347 UPAPDEBUG(LOG_INFO, ("pap_input: rcvd short header.\n"));
grzemich 0:d7bd7384a37c 348 return;
grzemich 0:d7bd7384a37c 349 }
grzemich 0:d7bd7384a37c 350 GETCHAR(code, inp);
grzemich 0:d7bd7384a37c 351 GETCHAR(id, inp);
grzemich 0:d7bd7384a37c 352 GETSHORT(len, inp);
grzemich 0:d7bd7384a37c 353 if (len < (int)UPAP_HEADERLEN) {
grzemich 0:d7bd7384a37c 354 UPAPDEBUG(LOG_INFO, ("pap_input: rcvd illegal length.\n"));
grzemich 0:d7bd7384a37c 355 return;
grzemich 0:d7bd7384a37c 356 }
grzemich 0:d7bd7384a37c 357 if (len > l) {
grzemich 0:d7bd7384a37c 358 UPAPDEBUG(LOG_INFO, ("pap_input: rcvd short packet.\n"));
grzemich 0:d7bd7384a37c 359 return;
grzemich 0:d7bd7384a37c 360 }
grzemich 0:d7bd7384a37c 361 len -= UPAP_HEADERLEN;
grzemich 0:d7bd7384a37c 362
grzemich 0:d7bd7384a37c 363 /*
grzemich 0:d7bd7384a37c 364 * Action depends on code.
grzemich 0:d7bd7384a37c 365 */
grzemich 0:d7bd7384a37c 366 switch (code) {
grzemich 0:d7bd7384a37c 367 case UPAP_AUTHREQ:
grzemich 0:d7bd7384a37c 368 upap_rauthreq(u, inp, id, len);
grzemich 0:d7bd7384a37c 369 break;
grzemich 0:d7bd7384a37c 370
grzemich 0:d7bd7384a37c 371 case UPAP_AUTHACK:
grzemich 0:d7bd7384a37c 372 upap_rauthack(u, inp, id, len);
grzemich 0:d7bd7384a37c 373 break;
grzemich 0:d7bd7384a37c 374
grzemich 0:d7bd7384a37c 375 case UPAP_AUTHNAK:
grzemich 0:d7bd7384a37c 376 upap_rauthnak(u, inp, id, len);
grzemich 0:d7bd7384a37c 377 break;
grzemich 0:d7bd7384a37c 378
grzemich 0:d7bd7384a37c 379 default: /* XXX Need code reject */
grzemich 0:d7bd7384a37c 380 UPAPDEBUG(LOG_INFO, ("pap_input: UNHANDLED default: code: %d, id: %d, len: %d.\n", code, id, len));
grzemich 0:d7bd7384a37c 381 break;
grzemich 0:d7bd7384a37c 382 }
grzemich 0:d7bd7384a37c 383 }
grzemich 0:d7bd7384a37c 384
grzemich 0:d7bd7384a37c 385
grzemich 0:d7bd7384a37c 386 /*
grzemich 0:d7bd7384a37c 387 * upap_rauth - Receive Authenticate.
grzemich 0:d7bd7384a37c 388 */
grzemich 0:d7bd7384a37c 389 static void
grzemich 0:d7bd7384a37c 390 upap_rauthreq(upap_state *u, u_char *inp, u_char id, int len)
grzemich 0:d7bd7384a37c 391 {
grzemich 0:d7bd7384a37c 392 u_char ruserlen, rpasswdlen;
grzemich 0:d7bd7384a37c 393 char *ruser, *rpasswd;
grzemich 0:d7bd7384a37c 394 u_char retcode;
grzemich 0:d7bd7384a37c 395 char *msg;
grzemich 0:d7bd7384a37c 396 int msglen;
grzemich 0:d7bd7384a37c 397
grzemich 0:d7bd7384a37c 398 UPAPDEBUG(LOG_INFO, ("pap_rauth: Rcvd id %d.\n", id));
grzemich 0:d7bd7384a37c 399
grzemich 0:d7bd7384a37c 400 if (u->us_serverstate < UPAPSS_LISTEN) {
grzemich 0:d7bd7384a37c 401 return;
grzemich 0:d7bd7384a37c 402 }
grzemich 0:d7bd7384a37c 403
grzemich 0:d7bd7384a37c 404 /*
grzemich 0:d7bd7384a37c 405 * If we receive a duplicate authenticate-request, we are
grzemich 0:d7bd7384a37c 406 * supposed to return the same status as for the first request.
grzemich 0:d7bd7384a37c 407 */
grzemich 0:d7bd7384a37c 408 if (u->us_serverstate == UPAPSS_OPEN) {
grzemich 0:d7bd7384a37c 409 upap_sresp(u, UPAP_AUTHACK, id, "", 0); /* return auth-ack */
grzemich 0:d7bd7384a37c 410 return;
grzemich 0:d7bd7384a37c 411 }
grzemich 0:d7bd7384a37c 412 if (u->us_serverstate == UPAPSS_BADAUTH) {
grzemich 0:d7bd7384a37c 413 upap_sresp(u, UPAP_AUTHNAK, id, "", 0); /* return auth-nak */
grzemich 0:d7bd7384a37c 414 return;
grzemich 0:d7bd7384a37c 415 }
grzemich 0:d7bd7384a37c 416
grzemich 0:d7bd7384a37c 417 /*
grzemich 0:d7bd7384a37c 418 * Parse user/passwd.
grzemich 0:d7bd7384a37c 419 */
grzemich 0:d7bd7384a37c 420 if (len < (int)sizeof (u_char)) {
grzemich 0:d7bd7384a37c 421 UPAPDEBUG(LOG_INFO, ("pap_rauth: rcvd short packet.\n"));
grzemich 0:d7bd7384a37c 422 return;
grzemich 0:d7bd7384a37c 423 }
grzemich 0:d7bd7384a37c 424 GETCHAR(ruserlen, inp);
grzemich 0:d7bd7384a37c 425 len -= sizeof (u_char) + ruserlen + sizeof (u_char);
grzemich 0:d7bd7384a37c 426 if (len < 0) {
grzemich 0:d7bd7384a37c 427 UPAPDEBUG(LOG_INFO, ("pap_rauth: rcvd short packet.\n"));
grzemich 0:d7bd7384a37c 428 return;
grzemich 0:d7bd7384a37c 429 }
grzemich 0:d7bd7384a37c 430 ruser = (char *) inp;
grzemich 0:d7bd7384a37c 431 INCPTR(ruserlen, inp);
grzemich 0:d7bd7384a37c 432 GETCHAR(rpasswdlen, inp);
grzemich 0:d7bd7384a37c 433 if (len < rpasswdlen) {
grzemich 0:d7bd7384a37c 434 UPAPDEBUG(LOG_INFO, ("pap_rauth: rcvd short packet.\n"));
grzemich 0:d7bd7384a37c 435 return;
grzemich 0:d7bd7384a37c 436 }
grzemich 0:d7bd7384a37c 437 rpasswd = (char *) inp;
grzemich 0:d7bd7384a37c 438
grzemich 0:d7bd7384a37c 439 /*
grzemich 0:d7bd7384a37c 440 * Check the username and password given.
grzemich 0:d7bd7384a37c 441 */
grzemich 0:d7bd7384a37c 442 retcode = check_passwd(u->us_unit, ruser, ruserlen, rpasswd, rpasswdlen, &msg, &msglen);
grzemich 0:d7bd7384a37c 443 /* lwip: currently retcode is always UPAP_AUTHACK */
grzemich 0:d7bd7384a37c 444 BZERO(rpasswd, rpasswdlen);
grzemich 0:d7bd7384a37c 445
grzemich 0:d7bd7384a37c 446 upap_sresp(u, retcode, id, msg, msglen);
grzemich 0:d7bd7384a37c 447
grzemich 0:d7bd7384a37c 448 if (retcode == UPAP_AUTHACK) {
grzemich 0:d7bd7384a37c 449 u->us_serverstate = UPAPSS_OPEN;
grzemich 0:d7bd7384a37c 450 auth_peer_success(u->us_unit, PPP_PAP, ruser, ruserlen);
grzemich 0:d7bd7384a37c 451 } else {
grzemich 0:d7bd7384a37c 452 u->us_serverstate = UPAPSS_BADAUTH;
grzemich 0:d7bd7384a37c 453 auth_peer_fail(u->us_unit, PPP_PAP);
grzemich 0:d7bd7384a37c 454 }
grzemich 0:d7bd7384a37c 455
grzemich 0:d7bd7384a37c 456 if (u->us_reqtimeout > 0) {
grzemich 0:d7bd7384a37c 457 UNTIMEOUT(upap_reqtimeout, u);
grzemich 0:d7bd7384a37c 458 }
grzemich 0:d7bd7384a37c 459 }
grzemich 0:d7bd7384a37c 460
grzemich 0:d7bd7384a37c 461
grzemich 0:d7bd7384a37c 462 /*
grzemich 0:d7bd7384a37c 463 * upap_rauthack - Receive Authenticate-Ack.
grzemich 0:d7bd7384a37c 464 */
grzemich 0:d7bd7384a37c 465 static void
grzemich 0:d7bd7384a37c 466 upap_rauthack(upap_state *u, u_char *inp, int id, int len)
grzemich 0:d7bd7384a37c 467 {
grzemich 0:d7bd7384a37c 468 u_char msglen;
grzemich 0:d7bd7384a37c 469 char *msg;
grzemich 0:d7bd7384a37c 470
grzemich 0:d7bd7384a37c 471 LWIP_UNUSED_ARG(id);
grzemich 0:d7bd7384a37c 472
grzemich 0:d7bd7384a37c 473 UPAPDEBUG(LOG_INFO, ("pap_rauthack: Rcvd id %d s=%d\n", id, u->us_clientstate));
grzemich 0:d7bd7384a37c 474
grzemich 0:d7bd7384a37c 475 if (u->us_clientstate != UPAPCS_AUTHREQ) { /* XXX */
grzemich 0:d7bd7384a37c 476 UPAPDEBUG(LOG_INFO, ("pap_rauthack: us_clientstate != UPAPCS_AUTHREQ\n"));
grzemich 0:d7bd7384a37c 477 return;
grzemich 0:d7bd7384a37c 478 }
grzemich 0:d7bd7384a37c 479
grzemich 0:d7bd7384a37c 480 /*
grzemich 0:d7bd7384a37c 481 * Parse message.
grzemich 0:d7bd7384a37c 482 */
grzemich 0:d7bd7384a37c 483 if (len < (int)sizeof (u_char)) {
grzemich 0:d7bd7384a37c 484 UPAPDEBUG(LOG_INFO, ("pap_rauthack: ignoring missing msg-length.\n"));
grzemich 0:d7bd7384a37c 485 } else {
grzemich 0:d7bd7384a37c 486 GETCHAR(msglen, inp);
grzemich 0:d7bd7384a37c 487 if (msglen > 0) {
grzemich 0:d7bd7384a37c 488 len -= sizeof (u_char);
grzemich 0:d7bd7384a37c 489 if (len < msglen) {
grzemich 0:d7bd7384a37c 490 UPAPDEBUG(LOG_INFO, ("pap_rauthack: rcvd short packet.\n"));
grzemich 0:d7bd7384a37c 491 return;
grzemich 0:d7bd7384a37c 492 }
grzemich 0:d7bd7384a37c 493 msg = (char *) inp;
grzemich 0:d7bd7384a37c 494 PRINTMSG(msg, msglen);
grzemich 0:d7bd7384a37c 495 }
grzemich 0:d7bd7384a37c 496 }
grzemich 0:d7bd7384a37c 497 UNTIMEOUT(upap_timeout, u); /* Cancel timeout */
grzemich 0:d7bd7384a37c 498 u->us_clientstate = UPAPCS_OPEN;
grzemich 0:d7bd7384a37c 499
grzemich 0:d7bd7384a37c 500 auth_withpeer_success(u->us_unit, PPP_PAP);
grzemich 0:d7bd7384a37c 501 }
grzemich 0:d7bd7384a37c 502
grzemich 0:d7bd7384a37c 503
grzemich 0:d7bd7384a37c 504 /*
grzemich 0:d7bd7384a37c 505 * upap_rauthnak - Receive Authenticate-Nak.
grzemich 0:d7bd7384a37c 506 */
grzemich 0:d7bd7384a37c 507 static void
grzemich 0:d7bd7384a37c 508 upap_rauthnak(upap_state *u, u_char *inp, int id, int len)
grzemich 0:d7bd7384a37c 509 {
grzemich 0:d7bd7384a37c 510 u_char msglen;
grzemich 0:d7bd7384a37c 511 char *msg;
grzemich 0:d7bd7384a37c 512
grzemich 0:d7bd7384a37c 513 LWIP_UNUSED_ARG(id);
grzemich 0:d7bd7384a37c 514
grzemich 0:d7bd7384a37c 515 UPAPDEBUG(LOG_INFO, ("pap_rauthnak: Rcvd id %d s=%d\n", id, u->us_clientstate));
grzemich 0:d7bd7384a37c 516
grzemich 0:d7bd7384a37c 517 if (u->us_clientstate != UPAPCS_AUTHREQ) { /* XXX */
grzemich 0:d7bd7384a37c 518 return;
grzemich 0:d7bd7384a37c 519 }
grzemich 0:d7bd7384a37c 520
grzemich 0:d7bd7384a37c 521 /*
grzemich 0:d7bd7384a37c 522 * Parse message.
grzemich 0:d7bd7384a37c 523 */
grzemich 0:d7bd7384a37c 524 if (len < sizeof (u_char)) {
grzemich 0:d7bd7384a37c 525 UPAPDEBUG(LOG_INFO, ("pap_rauthnak: ignoring missing msg-length.\n"));
grzemich 0:d7bd7384a37c 526 } else {
grzemich 0:d7bd7384a37c 527 GETCHAR(msglen, inp);
grzemich 0:d7bd7384a37c 528 if(msglen > 0) {
grzemich 0:d7bd7384a37c 529 len -= sizeof (u_char);
grzemich 0:d7bd7384a37c 530 if (len < msglen) {
grzemich 0:d7bd7384a37c 531 UPAPDEBUG(LOG_INFO, ("pap_rauthnak: rcvd short packet.\n"));
grzemich 0:d7bd7384a37c 532 return;
grzemich 0:d7bd7384a37c 533 }
grzemich 0:d7bd7384a37c 534 msg = (char *) inp;
grzemich 0:d7bd7384a37c 535 PRINTMSG(msg, msglen);
grzemich 0:d7bd7384a37c 536 }
grzemich 0:d7bd7384a37c 537 }
grzemich 0:d7bd7384a37c 538
grzemich 0:d7bd7384a37c 539 u->us_clientstate = UPAPCS_BADAUTH;
grzemich 0:d7bd7384a37c 540
grzemich 0:d7bd7384a37c 541 UPAPDEBUG(LOG_ERR, ("PAP authentication failed\n"));
grzemich 0:d7bd7384a37c 542 auth_withpeer_fail(u->us_unit, PPP_PAP);
grzemich 0:d7bd7384a37c 543 }
grzemich 0:d7bd7384a37c 544
grzemich 0:d7bd7384a37c 545
grzemich 0:d7bd7384a37c 546 /*
grzemich 0:d7bd7384a37c 547 * upap_sauthreq - Send an Authenticate-Request.
grzemich 0:d7bd7384a37c 548 */
grzemich 0:d7bd7384a37c 549 static void
grzemich 0:d7bd7384a37c 550 upap_sauthreq(upap_state *u)
grzemich 0:d7bd7384a37c 551 {
grzemich 0:d7bd7384a37c 552 u_char *outp;
grzemich 0:d7bd7384a37c 553 int outlen;
grzemich 0:d7bd7384a37c 554
grzemich 0:d7bd7384a37c 555 outlen = UPAP_HEADERLEN + 2 * sizeof (u_char)
grzemich 0:d7bd7384a37c 556 + u->us_userlen + u->us_passwdlen;
grzemich 0:d7bd7384a37c 557 outp = outpacket_buf[u->us_unit];
grzemich 0:d7bd7384a37c 558
grzemich 0:d7bd7384a37c 559 MAKEHEADER(outp, PPP_PAP);
grzemich 0:d7bd7384a37c 560
grzemich 0:d7bd7384a37c 561 PUTCHAR(UPAP_AUTHREQ, outp);
grzemich 0:d7bd7384a37c 562 PUTCHAR(++u->us_id, outp);
grzemich 0:d7bd7384a37c 563 PUTSHORT(outlen, outp);
grzemich 0:d7bd7384a37c 564 PUTCHAR(u->us_userlen, outp);
grzemich 0:d7bd7384a37c 565 BCOPY(u->us_user, outp, u->us_userlen);
grzemich 0:d7bd7384a37c 566 INCPTR(u->us_userlen, outp);
grzemich 0:d7bd7384a37c 567 PUTCHAR(u->us_passwdlen, outp);
grzemich 0:d7bd7384a37c 568 BCOPY(u->us_passwd, outp, u->us_passwdlen);
grzemich 0:d7bd7384a37c 569
grzemich 0:d7bd7384a37c 570 pppWrite(u->us_unit, outpacket_buf[u->us_unit], outlen + PPP_HDRLEN);
grzemich 0:d7bd7384a37c 571
grzemich 0:d7bd7384a37c 572 UPAPDEBUG(LOG_INFO, ("pap_sauth: Sent id %d\n", u->us_id));
grzemich 0:d7bd7384a37c 573
grzemich 0:d7bd7384a37c 574 TIMEOUT(upap_timeout, u, u->us_timeouttime);
grzemich 0:d7bd7384a37c 575 ++u->us_transmits;
grzemich 0:d7bd7384a37c 576 u->us_clientstate = UPAPCS_AUTHREQ;
grzemich 0:d7bd7384a37c 577 }
grzemich 0:d7bd7384a37c 578
grzemich 0:d7bd7384a37c 579
grzemich 0:d7bd7384a37c 580 /*
grzemich 0:d7bd7384a37c 581 * upap_sresp - Send a response (ack or nak).
grzemich 0:d7bd7384a37c 582 */
grzemich 0:d7bd7384a37c 583 static void
grzemich 0:d7bd7384a37c 584 upap_sresp(upap_state *u, u_char code, u_char id, char *msg, int msglen)
grzemich 0:d7bd7384a37c 585 {
grzemich 0:d7bd7384a37c 586 u_char *outp;
grzemich 0:d7bd7384a37c 587 int outlen;
grzemich 0:d7bd7384a37c 588
grzemich 0:d7bd7384a37c 589 outlen = UPAP_HEADERLEN + sizeof (u_char) + msglen;
grzemich 0:d7bd7384a37c 590 outp = outpacket_buf[u->us_unit];
grzemich 0:d7bd7384a37c 591 MAKEHEADER(outp, PPP_PAP);
grzemich 0:d7bd7384a37c 592
grzemich 0:d7bd7384a37c 593 PUTCHAR(code, outp);
grzemich 0:d7bd7384a37c 594 PUTCHAR(id, outp);
grzemich 0:d7bd7384a37c 595 PUTSHORT(outlen, outp);
grzemich 0:d7bd7384a37c 596 PUTCHAR(msglen, outp);
grzemich 0:d7bd7384a37c 597 BCOPY(msg, outp, msglen);
grzemich 0:d7bd7384a37c 598 pppWrite(u->us_unit, outpacket_buf[u->us_unit], outlen + PPP_HDRLEN);
grzemich 0:d7bd7384a37c 599
grzemich 0:d7bd7384a37c 600 UPAPDEBUG(LOG_INFO, ("pap_sresp: Sent code %d, id %d s=%d\n", code, id, u->us_clientstate));
grzemich 0:d7bd7384a37c 601 }
grzemich 0:d7bd7384a37c 602
grzemich 0:d7bd7384a37c 603 #if PPP_ADDITIONAL_CALLBACKS
grzemich 0:d7bd7384a37c 604 static char *upap_codenames[] = {
grzemich 0:d7bd7384a37c 605 "AuthReq", "AuthAck", "AuthNak"
grzemich 0:d7bd7384a37c 606 };
grzemich 0:d7bd7384a37c 607
grzemich 0:d7bd7384a37c 608 /*
grzemich 0:d7bd7384a37c 609 * upap_printpkt - print the contents of a PAP packet.
grzemich 0:d7bd7384a37c 610 */
grzemich 0:d7bd7384a37c 611 static int upap_printpkt(
grzemich 0:d7bd7384a37c 612 u_char *p,
grzemich 0:d7bd7384a37c 613 int plen,
grzemich 0:d7bd7384a37c 614 void (*printer) (void *, char *, ...),
grzemich 0:d7bd7384a37c 615 void *arg
grzemich 0:d7bd7384a37c 616 )
grzemich 0:d7bd7384a37c 617 {
grzemich 0:d7bd7384a37c 618 LWIP_UNUSED_ARG(p);
grzemich 0:d7bd7384a37c 619 LWIP_UNUSED_ARG(plen);
grzemich 0:d7bd7384a37c 620 LWIP_UNUSED_ARG(printer);
grzemich 0:d7bd7384a37c 621 LWIP_UNUSED_ARG(arg);
grzemich 0:d7bd7384a37c 622 return 0;
grzemich 0:d7bd7384a37c 623 }
grzemich 0:d7bd7384a37c 624 #endif /* PPP_ADDITIONAL_CALLBACKS */
grzemich 0:d7bd7384a37c 625
grzemich 0:d7bd7384a37c 626 #endif /* PAP_SUPPORT */
grzemich 0:d7bd7384a37c 627
grzemich 0:d7bd7384a37c 628 #endif /* PPP_SUPPORT */