1 /*****************************************************************************
2 * auth.c - Network Authentication and Phase Control program file.
4 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
5 * Copyright (c) 1997 by Global Election Systems Inc. All rights reserved.
7 * The authors hereby grant permission to use, copy, modify, distribute,
8 * and license this software and its documentation for any purpose, provided
9 * that existing copyright notices are retained in all copies and that this
10 * notice and the following disclaimer are included verbatim in any
11 * distributions. No written agreement, license, or royalty fee is required
12 * for any of the authorized uses.
14 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 ******************************************************************************
28 * 03-01-01 Marc Boucher <marc@mbsi.ca>
30 * 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
31 * Ported from public pppd code.
32 *****************************************************************************/
34 * auth.c - PPP authentication and phase control.
36 * Copyright (c) 1993 The Australian National University.
37 * All rights reserved.
39 * Redistribution and use in source and binary forms are permitted
40 * provided that the above copyright notice and this paragraph are
41 * duplicated in all such forms and that any documentation,
42 * advertising materials, and other materials related to such
43 * distribution and use acknowledge that the software was developed
44 * by the Australian National University. The name of the University
45 * may not be used to endorse or promote products derived from this
46 * software without specific prior written permission.
47 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
48 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
49 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
51 * Copyright (c) 1989 Carnegie Mellon University.
52 * All rights reserved.
54 * Redistribution and use in source and binary forms are permitted
55 * provided that the above copyright notice and this paragraph are
56 * duplicated in all such forms and that any documentation,
57 * advertising materials, and other materials related to such
58 * distribution and use acknowledge that the software was developed
59 * by Carnegie Mellon University. The name of the
60 * University may not be used to endorse or promote products derived
61 * from this software without specific prior written permission.
62 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
63 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
64 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
69 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
83 #endif /* CBCP_SUPPORT */
87 /*************************/
88 /*** LOCAL DEFINITIONS ***/
89 /*************************/
91 /* Bits in auth_pending[] */
92 #define PAP_WITHPEER 1
94 #define CHAP_WITHPEER 4
98 /************************/
99 /*** LOCAL DATA TYPES ***/
100 /************************/
101 /* Used for storing a sequence of words. Usually malloced. */
103 struct wordlist *next;
108 /***********************************/
109 /*** LOCAL FUNCTION DECLARATIONS ***/
110 /***********************************/
111 extern char *crypt (const char *, const char *);
113 /* Prototypes for procedures local to this file. */
115 static void network_phase (int);
116 static void check_idle (void *);
117 static void connect_time_expired (void *);
119 static int login (char *, char *, char **, int *);
121 static void logout (void);
122 static int null_login (int);
123 static int get_pap_passwd (int, char *, char *);
124 static int have_pap_secret (void);
125 static int have_chap_secret (char *, char *, u32_t);
126 static int ip_addr_check (u32_t, struct wordlist *);
127 #if 0 /* PAP_SUPPORT || CHAP_SUPPORT */
128 static void set_allowed_addrs(int unit, struct wordlist *addrs);
129 static void free_wordlist (struct wordlist *);
130 #endif /* 0 */ /* PAP_SUPPORT || CHAP_SUPPORT */
132 static void callback_phase (int);
133 #endif /* CBCP_SUPPORT */
136 /******************************/
137 /*** PUBLIC DATA STRUCTURES ***/
138 /******************************/
141 /*****************************/
142 /*** LOCAL DATA STRUCTURES ***/
143 /*****************************/
144 #if PAP_SUPPORT || CHAP_SUPPORT
145 /* The name by which the peer authenticated itself to us. */
146 static char peer_authname[MAXNAMELEN];
147 #endif /* PAP_SUPPORT || CHAP_SUPPORT */
149 /* Records which authentication operations haven't completed yet. */
150 static int auth_pending[NUM_PPP];
152 /* Set if we have successfully called login() */
153 static int logged_in;
155 /* Set if we have run the /etc/ppp/auth-up script. */
156 static int did_authup;
158 /* List of addresses which the peer may use. */
159 static struct wordlist *addresses[NUM_PPP];
161 /* Number of network protocols which we have opened. */
162 static int num_np_open;
164 /* Number of network protocols which have come up. */
165 static int num_np_up;
167 #if PAP_SUPPORT || CHAP_SUPPORT
168 /* Set if we got the contents of passwd[] from the pap-secrets file. */
169 static int passwd_from_file;
170 #endif /* PAP_SUPPORT || CHAP_SUPPORT */
173 /***********************************/
174 /*** PUBLIC FUNCTION DEFINITIONS ***/
175 /***********************************/
177 * An Open on LCP has requested a change from Dead to Establish phase.
178 * Do what's necessary to bring the physical layer up.
181 link_required(int unit)
183 LWIP_UNUSED_ARG(unit);
185 AUTHDEBUG((LOG_INFO, "link_required: %d\n", unit));
189 * LCP has terminated the link; go to the Dead phase and take the
190 * physical layer down.
193 link_terminated(int unit)
195 AUTHDEBUG((LOG_INFO, "link_terminated: %d\n", unit));
196 if (lcp_phase[unit] == PHASE_DEAD) {
202 lcp_phase[unit] = PHASE_DEAD;
203 AUTHDEBUG((LOG_NOTICE, "Connection terminated.\n"));
204 pppLinkTerminated(unit);
208 * LCP has gone down; it will either die or try to re-establish.
214 struct protent *protp;
216 AUTHDEBUG((LOG_INFO, "link_down: %d\n", unit));
218 /* XXX Do link down processing. */
221 for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
222 if (!protp->enabled_flag) {
225 if (protp->protocol != PPP_LCP && protp->lowerdown != NULL) {
226 (*protp->lowerdown)(unit);
228 if (protp->protocol < 0xC000 && protp->close != NULL) {
229 (*protp->close)(unit, "LCP down");
234 if (lcp_phase[unit] != PHASE_DEAD) {
235 lcp_phase[unit] = PHASE_TERMINATE;
241 * The link is established.
242 * Proceed to the Dead, Authenticate or Network phase as appropriate.
245 link_established(int unit)
249 struct protent *protp;
250 lcp_options *wo = &lcp_wantoptions[unit];
251 lcp_options *go = &lcp_gotoptions[unit];
252 #if PAP_SUPPORT || CHAP_SUPPORT
253 lcp_options *ho = &lcp_hisoptions[unit];
254 #endif /* PAP_SUPPORT || CHAP_SUPPORT */
256 AUTHDEBUG((LOG_INFO, "link_established: %d\n", unit));
258 * Tell higher-level protocols that LCP is up.
260 for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
261 if (protp->protocol != PPP_LCP && protp->enabled_flag && protp->lowerup != NULL) {
262 (*protp->lowerup)(unit);
265 if (ppp_settings.auth_required && !(go->neg_chap || go->neg_upap)) {
267 * We wanted the peer to authenticate itself, and it refused:
268 * treat it as though it authenticated with PAP using a username
269 * of "" and a password of "". If that's not OK, boot it out.
271 if (!wo->neg_upap || !null_login(unit)) {
272 AUTHDEBUG((LOG_WARNING, "peer refused to authenticate\n"));
273 lcp_close(unit, "peer refused to authenticate");
278 lcp_phase[unit] = PHASE_AUTHENTICATE;
282 ChapAuthPeer(unit, ppp_settings.our_name, go->chap_mdtype);
285 #endif /* CHAP_SUPPORT */
286 #if PAP_SUPPORT && CHAP_SUPPORT
288 #endif /* PAP_SUPPORT && CHAP_SUPPORT */
294 #endif /* PAP_SUPPORT */
297 ChapAuthWithPeer(unit, ppp_settings.user, ho->chap_mdtype);
298 auth |= CHAP_WITHPEER;
300 #endif /* CHAP_SUPPORT */
301 #if PAP_SUPPORT && CHAP_SUPPORT
303 #endif /* PAP_SUPPORT && CHAP_SUPPORT */
306 if (ppp_settings.passwd[0] == 0) {
307 passwd_from_file = 1;
308 if (!get_pap_passwd(unit, ppp_settings.user, ppp_settings.passwd)) {
309 AUTHDEBUG((LOG_ERR, "No secret found for PAP login\n"));
312 upap_authwithpeer(unit, ppp_settings.user, ppp_settings.passwd);
313 auth |= PAP_WITHPEER;
315 #endif /* PAP_SUPPORT */
316 auth_pending[unit] = auth;
324 * The peer has failed to authenticate himself using `protocol'.
327 auth_peer_fail(int unit, u16_t protocol)
329 LWIP_UNUSED_ARG(protocol);
331 AUTHDEBUG((LOG_INFO, "auth_peer_fail: %d proto=%X\n", unit, protocol));
333 * Authentication failure: take the link down
335 lcp_close(unit, "Authentication failed");
339 #if PAP_SUPPORT || CHAP_SUPPORT
341 * The peer has been successfully authenticated using `protocol'.
344 auth_peer_success(int unit, u16_t protocol, char *name, int namelen)
348 AUTHDEBUG((LOG_INFO, "auth_peer_success: %d proto=%X\n", unit, protocol));
357 AUTHDEBUG((LOG_WARNING, "auth_peer_success: unknown protocol %x\n", protocol));
362 * Save the authenticated name of the peer for later.
364 if (namelen > sizeof(peer_authname) - 1) {
365 namelen = sizeof(peer_authname) - 1;
367 BCOPY(name, peer_authname, namelen);
368 peer_authname[namelen] = 0;
371 * If there is no more authentication still to be done,
372 * proceed to the network (or callback) phase.
374 if ((auth_pending[unit] &= ~pbit) == 0) {
380 * We have failed to authenticate ourselves to the peer using `protocol'.
383 auth_withpeer_fail(int unit, u16_t protocol)
385 int errCode = PPPERR_AUTHFAIL;
387 LWIP_UNUSED_ARG(protocol);
389 AUTHDEBUG((LOG_INFO, "auth_withpeer_fail: %d proto=%X\n", unit, protocol));
390 if (passwd_from_file) {
391 BZERO(ppp_settings.passwd, MAXSECRETLEN);
394 * XXX Warning: the unit number indicates the interface which is
395 * not necessarily the PPP connection. It works here as long
396 * as we are only supporting PPP interfaces.
398 pppIOCtl(unit, PPPCTLS_ERRCODE, &errCode);
401 * We've failed to authenticate ourselves to our peer.
402 * He'll probably take the link down, and there's not much
403 * we can do except wait for that.
408 * We have successfully authenticated ourselves with the peer using `protocol'.
411 auth_withpeer_success(int unit, u16_t protocol)
415 AUTHDEBUG((LOG_INFO, "auth_withpeer_success: %d proto=%X\n", unit, protocol));
418 pbit = CHAP_WITHPEER;
421 if (passwd_from_file) {
422 BZERO(ppp_settings.passwd, MAXSECRETLEN);
427 AUTHDEBUG((LOG_WARNING, "auth_peer_success: unknown protocol %x\n", protocol));
432 * If there is no more authentication still being done,
433 * proceed to the network (or callback) phase.
435 if ((auth_pending[unit] &= ~pbit) == 0) {
439 #endif /* PAP_SUPPORT || CHAP_SUPPORT */
443 * np_up - a network protocol has come up.
446 np_up(int unit, u16_t proto)
448 LWIP_UNUSED_ARG(unit);
449 LWIP_UNUSED_ARG(proto);
451 AUTHDEBUG((LOG_INFO, "np_up: %d proto=%X\n", unit, proto));
452 if (num_np_up == 0) {
453 AUTHDEBUG((LOG_INFO, "np_up: maxconnect=%d idle_time_limit=%d\n",ppp_settings.maxconnect,ppp_settings.idle_time_limit));
455 * At this point we consider that the link has come up successfully.
457 if (ppp_settings.idle_time_limit > 0) {
458 TIMEOUT(check_idle, NULL, ppp_settings.idle_time_limit);
462 * Set a timeout to close the connection once the maximum
463 * connect time has expired.
465 if (ppp_settings.maxconnect > 0) {
466 TIMEOUT(connect_time_expired, 0, ppp_settings.maxconnect);
473 * np_down - a network protocol has gone down.
476 np_down(int unit, u16_t proto)
478 LWIP_UNUSED_ARG(unit);
479 LWIP_UNUSED_ARG(proto);
481 AUTHDEBUG((LOG_INFO, "np_down: %d proto=%X\n", unit, proto));
482 if (--num_np_up == 0 && ppp_settings.idle_time_limit > 0) {
483 UNTIMEOUT(check_idle, NULL);
488 * np_finished - a network protocol has finished using the link.
491 np_finished(int unit, u16_t proto)
493 LWIP_UNUSED_ARG(unit);
494 LWIP_UNUSED_ARG(proto);
496 AUTHDEBUG((LOG_INFO, "np_finished: %d proto=%X\n", unit, proto));
497 if (--num_np_open <= 0) {
498 /* no further use for the link: shut up shop. */
499 lcp_close(0, "No network protocols running");
504 * auth_reset - called when LCP is starting negotiations to recheck
505 * authentication options, i.e. whether we have appropriate secrets
506 * to use for authenticating ourselves and/or the peer.
511 lcp_options *go = &lcp_gotoptions[unit];
512 lcp_options *ao = &lcp_allowoptions[0];
513 ipcp_options *ipwo = &ipcp_wantoptions[0];
516 AUTHDEBUG((LOG_INFO, "auth_reset: %d\n", unit));
517 ao->neg_upap = !ppp_settings.refuse_pap && (ppp_settings.passwd[0] != 0 || get_pap_passwd(unit, NULL, NULL));
518 ao->neg_chap = !ppp_settings.refuse_chap && ppp_settings.passwd[0] != 0 /*have_chap_secret(ppp_settings.user, ppp_settings.remote_name, (u32_t)0)*/;
520 if (go->neg_upap && !have_pap_secret()) {
524 remote = ipwo->accept_remote? 0: ipwo->hisaddr;
525 if (!have_chap_secret(ppp_settings.remote_name, ppp_settings.our_name, remote)) {
533 * check_passwd - Check the user name and passwd against the PAP secrets
534 * file. If requested, also check against the system password database,
535 * and login the user if OK.
538 * UPAP_AUTHNAK: Authentication failed.
539 * UPAP_AUTHACK: Authentication succeeded.
540 * In either case, msg points to an appropriate message.
543 check_passwd( int unit, char *auser, int userlen, char *apasswd, int passwdlen, char **msg, int *msglen)
546 LWIP_UNUSED_ARG(unit);
547 LWIP_UNUSED_ARG(auser);
548 LWIP_UNUSED_ARG(userlen);
549 LWIP_UNUSED_ARG(apasswd);
550 LWIP_UNUSED_ARG(passwdlen);
551 LWIP_UNUSED_ARG(msglen);
553 return UPAP_AUTHACK; /* XXX Assume all entries OK. */
556 struct wordlist *addrs = NULL;
557 char passwd[256], user[256];
558 char secret[MAXWORDLEN];
559 static u_short attempts = 0;
562 * Make copies of apasswd and auser, then null-terminate them.
564 BCOPY(apasswd, passwd, passwdlen);
565 passwd[passwdlen] = '\0';
566 BCOPY(auser, user, userlen);
567 user[userlen] = '\0';
570 /* XXX Validate user name and password. */
571 ret = UPAP_AUTHACK; /* XXX Assume all entries OK. */
573 if (ret == UPAP_AUTHNAK) {
574 if (*msg == (char *) 0) {
575 *msg = "Login incorrect";
577 *msglen = strlen(*msg);
579 * Frustrate passwd stealer programs.
580 * Allow 10 tries, but start backing off after 3 (stolen from login).
581 * On 10'th, drop the connection.
583 if (attempts++ >= 10) {
584 AUTHDEBUG((LOG_WARNING, "%d LOGIN FAILURES BY %s\n", attempts, user));
585 /*ppp_panic("Excess Bad Logins");*/
588 sys_msleep((attempts - 3) * 5);
591 free_wordlist(addrs);
594 attempts = 0; /* Reset count */
595 if (*msg == (char *) 0) {
598 *msglen = strlen(*msg);
599 set_allowed_addrs(unit, addrs);
602 BZERO(passwd, sizeof(passwd));
603 BZERO(secret, sizeof(secret));
608 #endif /* PAP_SUPPORT */
612 * auth_ip_addr - check whether the peer is authorized to use
613 * a given IP address. Returns 1 if authorized, 0 otherwise.
616 auth_ip_addr(int unit, u32_t addr)
618 return ip_addr_check(addr, addresses[unit]);
622 * bad_ip_adrs - return 1 if the IP address is one we don't want
623 * to use, such as an address in the loopback net or a multicast address.
624 * addr is in network byte order.
627 bad_ip_adrs(u32_t addr)
630 return (addr >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET
631 || IN_MULTICAST(addr) || IN_BADCLASS(addr);
637 * get_secret - open the CHAP secret file and return the secret
638 * for authenticating the given client on the given server.
639 * (We could be either client or server).
641 int get_secret( int unit, char *client, char *server, char *secret, int *secret_len, int save_addrs)
645 struct wordlist *addrs;
647 LWIP_UNUSED_ARG(unit);
648 LWIP_UNUSED_ARG(server);
649 LWIP_UNUSED_ARG(save_addrs);
653 if(!client || !client[0] || strcmp(client, ppp_settings.user)) {
657 len = strlen(ppp_settings.passwd);
658 if (len > MAXSECRETLEN) {
659 AUTHDEBUG((LOG_ERR, "Secret for %s on %s is too long\n", client, server));
663 BCOPY(ppp_settings.passwd, secret, len);
669 struct wordlist *addrs;
670 char secbuf[MAXWORDLEN];
675 /* XXX Find secret. */
681 set_allowed_addrs(unit, addrs);
684 len = strlen(secbuf);
685 if (len > MAXSECRETLEN) {
686 AUTHDEBUG((LOG_ERR, "Secret for %s on %s is too long\n", client, server));
690 BCOPY(secbuf, secret, len);
691 BZERO(secbuf, sizeof(secbuf));
697 #endif /* CHAP_SUPPORT */
702 * auth_check_options - called to check authentication options.
705 auth_check_options(void)
707 lcp_options *wo = &lcp_wantoptions[0];
709 ipcp_options *ipwo = &ipcp_wantoptions[0];
712 /* Default our_name to hostname, and user to our_name */
713 if (ppp_settings.our_name[0] == 0 || ppp_settings.usehostname) {
714 strcpy(ppp_settings.our_name, ppp_settings.hostname);
717 if (ppp_settings.user[0] == 0) {
718 strcpy(ppp_settings.user, ppp_settings.our_name);
721 /* If authentication is required, ask peer for CHAP or PAP. */
722 if (ppp_settings.auth_required && !wo->neg_chap && !wo->neg_upap) {
728 * Check whether we have appropriate secrets to use
729 * to authenticate the peer.
731 can_auth = wo->neg_upap && have_pap_secret();
732 if (!can_auth && wo->neg_chap) {
733 remote = ipwo->accept_remote? 0: ipwo->hisaddr;
734 can_auth = have_chap_secret(ppp_settings.remote_name, ppp_settings.our_name, remote);
737 if (ppp_settings.auth_required && !can_auth) {
738 ppp_panic("No auth secret");
744 /**********************************/
745 /*** LOCAL FUNCTION DEFINITIONS ***/
746 /**********************************/
748 * Proceed to the network phase.
751 network_phase(int unit)
754 struct protent *protp;
755 lcp_options *go = &lcp_gotoptions[unit];
758 * If the peer had to authenticate, run the auth-up script now.
760 if ((go->neg_chap || go->neg_upap) && !did_authup) {
761 /* XXX Do setup for peer authentication. */
767 * If we negotiated callback, do it now.
770 lcp_phase[unit] = PHASE_CALLBACK;
771 (*cbcp_protent.open)(unit);
774 #endif /* CBCP_SUPPORT */
776 lcp_phase[unit] = PHASE_NETWORK;
777 for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
778 if (protp->protocol < 0xC000 && protp->enabled_flag && protp->open != NULL) {
779 (*protp->open)(unit);
780 if (protp->protocol != PPP_CCP) {
786 if (num_np_open == 0) {
788 lcp_close(0, "No network protocols running");
793 * check_idle - check whether the link has been idle for long
794 * enough that we can shut it down.
797 check_idle(void *arg)
799 struct ppp_idle idle;
802 LWIP_UNUSED_ARG(arg);
803 if (!get_idle_time(0, &idle)) {
806 itime = LWIP_MIN(idle.xmit_idle, idle.recv_idle);
807 if (itime >= ppp_settings.idle_time_limit) {
808 /* link is idle: shut it down. */
809 AUTHDEBUG((LOG_INFO, "Terminating connection due to lack of activity.\n"));
810 lcp_close(0, "Link inactive");
812 TIMEOUT(check_idle, NULL, ppp_settings.idle_time_limit - itime);
817 * connect_time_expired - log a message and close the connection.
820 connect_time_expired(void *arg)
822 LWIP_UNUSED_ARG(arg);
824 AUTHDEBUG((LOG_INFO, "Connect time expired\n"));
825 lcp_close(0, "Connect time expired"); /* Close connection */
830 * login - Check the user name and password against the system
831 * password database, and login the user if OK.
834 * UPAP_AUTHNAK: Login failed.
835 * UPAP_AUTHACK: Login succeeded.
836 * In either case, msg points to an appropriate message.
839 login(char *user, char *passwd, char **msg, int *msglen)
841 /* XXX Fail until we decide that we want to support logins. */
842 return (UPAP_AUTHNAK);
847 * logout - Logout the user.
856 * null_login - Check if a username of "" and a password of "" are
857 * acceptable, and iff so, set the list of acceptable IP addresses
863 LWIP_UNUSED_ARG(unit);
864 /* XXX Fail until we decide that we want to support logins. */
869 * get_pap_passwd - get a password for authenticating ourselves with
870 * our peer using PAP. Returns 1 on success, 0 if no suitable password
874 get_pap_passwd(int unit, char *user, char *passwd)
876 LWIP_UNUSED_ARG(unit);
877 /* normally we would reject PAP if no password is provided,
878 but this causes problems with some providers (like CHT in Taiwan)
879 who incorrectly request PAP and expect a bogus/empty password, so
880 always provide a default user/passwd of "none"/"none"
883 strcpy(user, "none");
886 strcpy(passwd, "none");
892 * have_pap_secret - check whether we have a PAP file with any
893 * secrets that we could possibly use for authenticating the peer.
896 have_pap_secret(void)
898 /* XXX Fail until we set up our passwords. */
903 * have_chap_secret - check whether we have a CHAP file with a
904 * secret that we could possibly use for authenticating `client'
905 * on `server'. Either can be the null string, meaning we don't
906 * know the identity yet.
909 have_chap_secret(char *client, char *server, u32_t remote)
911 LWIP_UNUSED_ARG(client);
912 LWIP_UNUSED_ARG(server);
913 LWIP_UNUSED_ARG(remote);
914 /* XXX Fail until we set up our passwords. */
918 #if 0 /* PAP_SUPPORT || CHAP_SUPPORT */
920 * set_allowed_addrs() - set the list of allowed addresses.
923 set_allowed_addrs(int unit, struct wordlist *addrs)
925 if (addresses[unit] != NULL) {
926 free_wordlist(addresses[unit]);
928 addresses[unit] = addrs;
932 * If there's only one authorized address we might as well
933 * ask our peer for that one right away
935 if (addrs != NULL && addrs->next == NULL) {
936 char *p = addrs->word;
937 struct ipcp_options *wo = &ipcp_wantoptions[unit];
941 if (wo->hisaddr == 0 && *p != '!' && *p != '-' && strchr(p, '/') == NULL) {
942 hp = gethostbyname(p);
943 if (hp != NULL && hp->h_addrtype == AF_INET) {
944 a = *(u32_t *)hp->h_addr;
948 if (a != (u32_t) -1) {
955 #endif /* 0 */ /* PAP_SUPPORT || CHAP_SUPPORT */
958 ip_addr_check(u32_t addr, struct wordlist *addrs)
960 /* don't allow loopback or multicast address */
961 if (bad_ip_adrs(addr)) {
966 return !ppp_settings.auth_required; /* no addresses authorized */
969 /* XXX All other addresses allowed. */
973 #if 0 /* PAP_SUPPORT || CHAP_SUPPORT */
975 * free_wordlist - release memory allocated for a wordlist.
978 free_wordlist(struct wordlist *wp)
980 struct wordlist *next;
988 #endif /* 0 */ /* PAP_SUPPORT || CHAP_SUPPORT */
990 #endif /* PPP_SUPPORT */