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 */
85 /*************************/
86 /*** LOCAL DEFINITIONS ***/
87 /*************************/
89 /* Bits in auth_pending[] */
90 #define PAP_WITHPEER 1
92 #define CHAP_WITHPEER 4
96 /************************/
97 /*** LOCAL DATA TYPES ***/
98 /************************/
99 /* Used for storing a sequence of words. Usually malloced. */
101 struct wordlist *next;
106 /***********************************/
107 /*** LOCAL FUNCTION DECLARATIONS ***/
108 /***********************************/
109 extern char *crypt (const char *, const char *);
111 /* Prototypes for procedures local to this file. */
113 static void network_phase (int);
114 static void check_idle (void *);
115 static void connect_time_expired (void *);
117 static int login (char *, char *, char **, int *);
119 static void logout (void);
120 static int null_login (int);
121 static int get_pap_passwd (int, char *, char *);
122 static int have_pap_secret (void);
123 static int have_chap_secret (char *, char *, u32_t);
124 static int ip_addr_check (u32_t, struct wordlist *);
125 #if 0 /* PAP_SUPPORT || CHAP_SUPPORT */
126 static void set_allowed_addrs(int unit, struct wordlist *addrs);
127 static void free_wordlist (struct wordlist *);
128 #endif /* 0 */ /* PAP_SUPPORT || CHAP_SUPPORT */
130 static void callback_phase (int);
131 #endif /* CBCP_SUPPORT */
134 /******************************/
135 /*** PUBLIC DATA STRUCTURES ***/
136 /******************************/
139 /*****************************/
140 /*** LOCAL DATA STRUCTURES ***/
141 /*****************************/
142 #if PAP_SUPPORT || CHAP_SUPPORT
143 /* The name by which the peer authenticated itself to us. */
144 static char peer_authname[MAXNAMELEN];
145 #endif /* PAP_SUPPORT || CHAP_SUPPORT */
147 /* Records which authentication operations haven't completed yet. */
148 static int auth_pending[NUM_PPP];
150 /* Set if we have successfully called login() */
151 static int logged_in;
153 /* Set if we have run the /etc/ppp/auth-up script. */
154 static int did_authup;
156 /* List of addresses which the peer may use. */
157 static struct wordlist *addresses[NUM_PPP];
159 /* Number of network protocols which we have opened. */
160 static int num_np_open;
162 /* Number of network protocols which have come up. */
163 static int num_np_up;
165 #if PAP_SUPPORT || CHAP_SUPPORT
166 /* Set if we got the contents of passwd[] from the pap-secrets file. */
167 static int passwd_from_file;
168 #endif /* PAP_SUPPORT || CHAP_SUPPORT */
171 /***********************************/
172 /*** PUBLIC FUNCTION DEFINITIONS ***/
173 /***********************************/
175 * An Open on LCP has requested a change from Dead to Establish phase.
176 * Do what's necessary to bring the physical layer up.
179 link_required(int unit)
181 LWIP_UNUSED_ARG(unit);
183 AUTHDEBUG((LOG_INFO, "link_required: %d\n", unit));
187 * LCP has terminated the link; go to the Dead phase and take the
188 * physical layer down.
191 link_terminated(int unit)
193 AUTHDEBUG((LOG_INFO, "link_terminated: %d\n", unit));
194 if (lcp_phase[unit] == PHASE_DEAD) {
200 lcp_phase[unit] = PHASE_DEAD;
201 AUTHDEBUG((LOG_NOTICE, "Connection terminated.\n"));
202 pppLinkTerminated(unit);
206 * LCP has gone down; it will either die or try to re-establish.
212 struct protent *protp;
214 AUTHDEBUG((LOG_INFO, "link_down: %d\n", unit));
216 /* XXX Do link down processing. */
219 for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
220 if (!protp->enabled_flag) {
223 if (protp->protocol != PPP_LCP && protp->lowerdown != NULL) {
224 (*protp->lowerdown)(unit);
226 if (protp->protocol < 0xC000 && protp->close != NULL) {
227 (*protp->close)(unit, "LCP down");
232 if (lcp_phase[unit] != PHASE_DEAD) {
233 lcp_phase[unit] = PHASE_TERMINATE;
239 * The link is established.
240 * Proceed to the Dead, Authenticate or Network phase as appropriate.
243 link_established(int unit)
247 struct protent *protp;
248 lcp_options *wo = &lcp_wantoptions[unit];
249 lcp_options *go = &lcp_gotoptions[unit];
250 #if PAP_SUPPORT || CHAP_SUPPORT
251 lcp_options *ho = &lcp_hisoptions[unit];
252 #endif /* PAP_SUPPORT || CHAP_SUPPORT */
254 AUTHDEBUG((LOG_INFO, "link_established: %d\n", unit));
256 * Tell higher-level protocols that LCP is up.
258 for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
259 if (protp->protocol != PPP_LCP && protp->enabled_flag && protp->lowerup != NULL) {
260 (*protp->lowerup)(unit);
263 if (ppp_settings.auth_required && !(go->neg_chap || go->neg_upap)) {
265 * We wanted the peer to authenticate itself, and it refused:
266 * treat it as though it authenticated with PAP using a username
267 * of "" and a password of "". If that's not OK, boot it out.
269 if (!wo->neg_upap || !null_login(unit)) {
270 AUTHDEBUG((LOG_WARNING, "peer refused to authenticate\n"));
271 lcp_close(unit, "peer refused to authenticate");
276 lcp_phase[unit] = PHASE_AUTHENTICATE;
280 ChapAuthPeer(unit, ppp_settings.our_name, go->chap_mdtype);
283 #endif /* CHAP_SUPPORT */
284 #if PAP_SUPPORT && CHAP_SUPPORT
286 #endif /* PAP_SUPPORT && CHAP_SUPPORT */
292 #endif /* PAP_SUPPORT */
295 ChapAuthWithPeer(unit, ppp_settings.user, ho->chap_mdtype);
296 auth |= CHAP_WITHPEER;
298 #endif /* CHAP_SUPPORT */
299 #if PAP_SUPPORT && CHAP_SUPPORT
301 #endif /* PAP_SUPPORT && CHAP_SUPPORT */
304 if (ppp_settings.passwd[0] == 0) {
305 passwd_from_file = 1;
306 if (!get_pap_passwd(unit, ppp_settings.user, ppp_settings.passwd)) {
307 AUTHDEBUG((LOG_ERR, "No secret found for PAP login\n"));
310 upap_authwithpeer(unit, ppp_settings.user, ppp_settings.passwd);
311 auth |= PAP_WITHPEER;
313 #endif /* PAP_SUPPORT */
314 auth_pending[unit] = auth;
322 * The peer has failed to authenticate himself using `protocol'.
325 auth_peer_fail(int unit, u16_t protocol)
327 LWIP_UNUSED_ARG(protocol);
329 AUTHDEBUG((LOG_INFO, "auth_peer_fail: %d proto=%X\n", unit, protocol));
331 * Authentication failure: take the link down
333 lcp_close(unit, "Authentication failed");
337 #if PAP_SUPPORT || CHAP_SUPPORT
339 * The peer has been successfully authenticated using `protocol'.
342 auth_peer_success(int unit, u16_t protocol, char *name, int namelen)
346 AUTHDEBUG((LOG_INFO, "auth_peer_success: %d proto=%X\n", unit, protocol));
355 AUTHDEBUG((LOG_WARNING, "auth_peer_success: unknown protocol %x\n", protocol));
360 * Save the authenticated name of the peer for later.
362 if (namelen > sizeof(peer_authname) - 1) {
363 namelen = sizeof(peer_authname) - 1;
365 BCOPY(name, peer_authname, namelen);
366 peer_authname[namelen] = 0;
369 * If there is no more authentication still to be done,
370 * proceed to the network (or callback) phase.
372 if ((auth_pending[unit] &= ~pbit) == 0) {
378 * We have failed to authenticate ourselves to the peer using `protocol'.
381 auth_withpeer_fail(int unit, u16_t protocol)
383 int errCode = PPPERR_AUTHFAIL;
385 LWIP_UNUSED_ARG(protocol);
387 AUTHDEBUG((LOG_INFO, "auth_withpeer_fail: %d proto=%X\n", unit, protocol));
388 if (passwd_from_file) {
389 BZERO(ppp_settings.passwd, MAXSECRETLEN);
392 * XXX Warning: the unit number indicates the interface which is
393 * not necessarily the PPP connection. It works here as long
394 * as we are only supporting PPP interfaces.
396 pppIOCtl(unit, PPPCTLS_ERRCODE, &errCode);
399 * We've failed to authenticate ourselves to our peer.
400 * He'll probably take the link down, and there's not much
401 * we can do except wait for that.
406 * We have successfully authenticated ourselves with the peer using `protocol'.
409 auth_withpeer_success(int unit, u16_t protocol)
413 AUTHDEBUG((LOG_INFO, "auth_withpeer_success: %d proto=%X\n", unit, protocol));
416 pbit = CHAP_WITHPEER;
419 if (passwd_from_file) {
420 BZERO(ppp_settings.passwd, MAXSECRETLEN);
425 AUTHDEBUG((LOG_WARNING, "auth_peer_success: unknown protocol %x\n", protocol));
430 * If there is no more authentication still being done,
431 * proceed to the network (or callback) phase.
433 if ((auth_pending[unit] &= ~pbit) == 0) {
437 #endif /* PAP_SUPPORT || CHAP_SUPPORT */
441 * np_up - a network protocol has come up.
444 np_up(int unit, u16_t proto)
446 LWIP_UNUSED_ARG(unit);
447 LWIP_UNUSED_ARG(proto);
449 AUTHDEBUG((LOG_INFO, "np_up: %d proto=%X\n", unit, proto));
450 if (num_np_up == 0) {
451 AUTHDEBUG((LOG_INFO, "np_up: maxconnect=%d idle_time_limit=%d\n",ppp_settings.maxconnect,ppp_settings.idle_time_limit));
453 * At this point we consider that the link has come up successfully.
455 if (ppp_settings.idle_time_limit > 0) {
456 TIMEOUT(check_idle, NULL, ppp_settings.idle_time_limit);
460 * Set a timeout to close the connection once the maximum
461 * connect time has expired.
463 if (ppp_settings.maxconnect > 0) {
464 TIMEOUT(connect_time_expired, 0, ppp_settings.maxconnect);
471 * np_down - a network protocol has gone down.
474 np_down(int unit, u16_t proto)
476 LWIP_UNUSED_ARG(unit);
477 LWIP_UNUSED_ARG(proto);
479 AUTHDEBUG((LOG_INFO, "np_down: %d proto=%X\n", unit, proto));
480 if (--num_np_up == 0 && ppp_settings.idle_time_limit > 0) {
481 UNTIMEOUT(check_idle, NULL);
486 * np_finished - a network protocol has finished using the link.
489 np_finished(int unit, u16_t proto)
491 LWIP_UNUSED_ARG(unit);
492 LWIP_UNUSED_ARG(proto);
494 AUTHDEBUG((LOG_INFO, "np_finished: %d proto=%X\n", unit, proto));
495 if (--num_np_open <= 0) {
496 /* no further use for the link: shut up shop. */
497 lcp_close(0, "No network protocols running");
502 * auth_reset - called when LCP is starting negotiations to recheck
503 * authentication options, i.e. whether we have appropriate secrets
504 * to use for authenticating ourselves and/or the peer.
509 lcp_options *go = &lcp_gotoptions[unit];
510 lcp_options *ao = &lcp_allowoptions[0];
511 ipcp_options *ipwo = &ipcp_wantoptions[0];
514 AUTHDEBUG((LOG_INFO, "auth_reset: %d\n", unit));
515 ao->neg_upap = !ppp_settings.refuse_pap && (ppp_settings.passwd[0] != 0 || get_pap_passwd(unit, NULL, NULL));
516 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)*/;
518 if (go->neg_upap && !have_pap_secret()) {
522 remote = ipwo->accept_remote? 0: ipwo->hisaddr;
523 if (!have_chap_secret(ppp_settings.remote_name, ppp_settings.our_name, remote)) {
531 * check_passwd - Check the user name and passwd against the PAP secrets
532 * file. If requested, also check against the system password database,
533 * and login the user if OK.
536 * UPAP_AUTHNAK: Authentication failed.
537 * UPAP_AUTHACK: Authentication succeeded.
538 * In either case, msg points to an appropriate message.
541 check_passwd( int unit, char *auser, int userlen, char *apasswd, int passwdlen, char **msg, int *msglen)
544 LWIP_UNUSED_ARG(unit);
545 LWIP_UNUSED_ARG(auser);
546 LWIP_UNUSED_ARG(userlen);
547 LWIP_UNUSED_ARG(apasswd);
548 LWIP_UNUSED_ARG(passwdlen);
549 LWIP_UNUSED_ARG(msglen);
551 return UPAP_AUTHACK; /* XXX Assume all entries OK. */
554 struct wordlist *addrs = NULL;
555 char passwd[256], user[256];
556 char secret[MAXWORDLEN];
557 static u_short attempts = 0;
560 * Make copies of apasswd and auser, then null-terminate them.
562 BCOPY(apasswd, passwd, passwdlen);
563 passwd[passwdlen] = '\0';
564 BCOPY(auser, user, userlen);
565 user[userlen] = '\0';
568 /* XXX Validate user name and password. */
569 ret = UPAP_AUTHACK; /* XXX Assume all entries OK. */
571 if (ret == UPAP_AUTHNAK) {
572 if (*msg == (char *) 0) {
573 *msg = "Login incorrect";
575 *msglen = strlen(*msg);
577 * Frustrate passwd stealer programs.
578 * Allow 10 tries, but start backing off after 3 (stolen from login).
579 * On 10'th, drop the connection.
581 if (attempts++ >= 10) {
582 AUTHDEBUG((LOG_WARNING, "%d LOGIN FAILURES BY %s\n", attempts, user));
583 /*ppp_panic("Excess Bad Logins");*/
586 sys_msleep((attempts - 3) * 5);
589 free_wordlist(addrs);
592 attempts = 0; /* Reset count */
593 if (*msg == (char *) 0) {
596 *msglen = strlen(*msg);
597 set_allowed_addrs(unit, addrs);
600 BZERO(passwd, sizeof(passwd));
601 BZERO(secret, sizeof(secret));
606 #endif /* PAP_SUPPORT */
610 * auth_ip_addr - check whether the peer is authorized to use
611 * a given IP address. Returns 1 if authorized, 0 otherwise.
614 auth_ip_addr(int unit, u32_t addr)
616 return ip_addr_check(addr, addresses[unit]);
620 * bad_ip_adrs - return 1 if the IP address is one we don't want
621 * to use, such as an address in the loopback net or a multicast address.
622 * addr is in network byte order.
625 bad_ip_adrs(u32_t addr)
628 return (addr >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET
629 || IN_MULTICAST(addr) || IN_BADCLASS(addr);
635 * get_secret - open the CHAP secret file and return the secret
636 * for authenticating the given client on the given server.
637 * (We could be either client or server).
639 int get_secret( int unit, char *client, char *server, char *secret, int *secret_len, int save_addrs)
643 struct wordlist *addrs;
645 LWIP_UNUSED_ARG(unit);
646 LWIP_UNUSED_ARG(server);
647 LWIP_UNUSED_ARG(save_addrs);
651 if(!client || !client[0] || strcmp(client, ppp_settings.user)) {
655 len = strlen(ppp_settings.passwd);
656 if (len > MAXSECRETLEN) {
657 AUTHDEBUG((LOG_ERR, "Secret for %s on %s is too long\n", client, server));
661 BCOPY(ppp_settings.passwd, secret, len);
667 struct wordlist *addrs;
668 char secbuf[MAXWORDLEN];
673 /* XXX Find secret. */
679 set_allowed_addrs(unit, addrs);
682 len = strlen(secbuf);
683 if (len > MAXSECRETLEN) {
684 AUTHDEBUG((LOG_ERR, "Secret for %s on %s is too long\n", client, server));
688 BCOPY(secbuf, secret, len);
689 BZERO(secbuf, sizeof(secbuf));
695 #endif /* CHAP_SUPPORT */
700 * auth_check_options - called to check authentication options.
703 auth_check_options(void)
705 lcp_options *wo = &lcp_wantoptions[0];
707 ipcp_options *ipwo = &ipcp_wantoptions[0];
710 /* Default our_name to hostname, and user to our_name */
711 if (ppp_settings.our_name[0] == 0 || ppp_settings.usehostname) {
712 strcpy(ppp_settings.our_name, ppp_settings.hostname);
715 if (ppp_settings.user[0] == 0) {
716 strcpy(ppp_settings.user, ppp_settings.our_name);
719 /* If authentication is required, ask peer for CHAP or PAP. */
720 if (ppp_settings.auth_required && !wo->neg_chap && !wo->neg_upap) {
726 * Check whether we have appropriate secrets to use
727 * to authenticate the peer.
729 can_auth = wo->neg_upap && have_pap_secret();
730 if (!can_auth && wo->neg_chap) {
731 remote = ipwo->accept_remote? 0: ipwo->hisaddr;
732 can_auth = have_chap_secret(ppp_settings.remote_name, ppp_settings.our_name, remote);
735 if (ppp_settings.auth_required && !can_auth) {
736 ppp_panic("No auth secret");
742 /**********************************/
743 /*** LOCAL FUNCTION DEFINITIONS ***/
744 /**********************************/
746 * Proceed to the network phase.
749 network_phase(int unit)
752 struct protent *protp;
753 lcp_options *go = &lcp_gotoptions[unit];
756 * If the peer had to authenticate, run the auth-up script now.
758 if ((go->neg_chap || go->neg_upap) && !did_authup) {
759 /* XXX Do setup for peer authentication. */
765 * If we negotiated callback, do it now.
768 lcp_phase[unit] = PHASE_CALLBACK;
769 (*cbcp_protent.open)(unit);
772 #endif /* CBCP_SUPPORT */
774 lcp_phase[unit] = PHASE_NETWORK;
775 for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
776 if (protp->protocol < 0xC000 && protp->enabled_flag && protp->open != NULL) {
777 (*protp->open)(unit);
778 if (protp->protocol != PPP_CCP) {
784 if (num_np_open == 0) {
786 lcp_close(0, "No network protocols running");
791 * check_idle - check whether the link has been idle for long
792 * enough that we can shut it down.
795 check_idle(void *arg)
797 struct ppp_idle idle;
800 LWIP_UNUSED_ARG(arg);
801 if (!get_idle_time(0, &idle)) {
804 itime = LWIP_MIN(idle.xmit_idle, idle.recv_idle);
805 if (itime >= ppp_settings.idle_time_limit) {
806 /* link is idle: shut it down. */
807 AUTHDEBUG((LOG_INFO, "Terminating connection due to lack of activity.\n"));
808 lcp_close(0, "Link inactive");
810 TIMEOUT(check_idle, NULL, ppp_settings.idle_time_limit - itime);
815 * connect_time_expired - log a message and close the connection.
818 connect_time_expired(void *arg)
820 LWIP_UNUSED_ARG(arg);
822 AUTHDEBUG((LOG_INFO, "Connect time expired\n"));
823 lcp_close(0, "Connect time expired"); /* Close connection */
828 * login - Check the user name and password against the system
829 * password database, and login the user if OK.
832 * UPAP_AUTHNAK: Login failed.
833 * UPAP_AUTHACK: Login succeeded.
834 * In either case, msg points to an appropriate message.
837 login(char *user, char *passwd, char **msg, int *msglen)
839 /* XXX Fail until we decide that we want to support logins. */
840 return (UPAP_AUTHNAK);
845 * logout - Logout the user.
854 * null_login - Check if a username of "" and a password of "" are
855 * acceptable, and iff so, set the list of acceptable IP addresses
861 LWIP_UNUSED_ARG(unit);
862 /* XXX Fail until we decide that we want to support logins. */
867 * get_pap_passwd - get a password for authenticating ourselves with
868 * our peer using PAP. Returns 1 on success, 0 if no suitable password
872 get_pap_passwd(int unit, char *user, char *passwd)
874 LWIP_UNUSED_ARG(unit);
875 /* normally we would reject PAP if no password is provided,
876 but this causes problems with some providers (like CHT in Taiwan)
877 who incorrectly request PAP and expect a bogus/empty password, so
878 always provide a default user/passwd of "none"/"none"
881 strcpy(user, "none");
884 strcpy(passwd, "none");
890 * have_pap_secret - check whether we have a PAP file with any
891 * secrets that we could possibly use for authenticating the peer.
894 have_pap_secret(void)
896 /* XXX Fail until we set up our passwords. */
901 * have_chap_secret - check whether we have a CHAP file with a
902 * secret that we could possibly use for authenticating `client'
903 * on `server'. Either can be the null string, meaning we don't
904 * know the identity yet.
907 have_chap_secret(char *client, char *server, u32_t remote)
909 LWIP_UNUSED_ARG(client);
910 LWIP_UNUSED_ARG(server);
911 LWIP_UNUSED_ARG(remote);
912 /* XXX Fail until we set up our passwords. */
916 #if 0 /* PAP_SUPPORT || CHAP_SUPPORT */
918 * set_allowed_addrs() - set the list of allowed addresses.
921 set_allowed_addrs(int unit, struct wordlist *addrs)
923 if (addresses[unit] != NULL) {
924 free_wordlist(addresses[unit]);
926 addresses[unit] = addrs;
930 * If there's only one authorized address we might as well
931 * ask our peer for that one right away
933 if (addrs != NULL && addrs->next == NULL) {
934 char *p = addrs->word;
935 struct ipcp_options *wo = &ipcp_wantoptions[unit];
939 if (wo->hisaddr == 0 && *p != '!' && *p != '-' && strchr(p, '/') == NULL) {
940 hp = gethostbyname(p);
941 if (hp != NULL && hp->h_addrtype == AF_INET) {
942 a = *(u32_t *)hp->h_addr;
946 if (a != (u32_t) -1) {
953 #endif /* 0 */ /* PAP_SUPPORT || CHAP_SUPPORT */
956 ip_addr_check(u32_t addr, struct wordlist *addrs)
958 /* don't allow loopback or multicast address */
959 if (bad_ip_adrs(addr)) {
964 return !ppp_settings.auth_required; /* no addresses authorized */
967 /* XXX All other addresses allowed. */
971 #if 0 /* PAP_SUPPORT || CHAP_SUPPORT */
973 * free_wordlist - release memory allocated for a wordlist.
976 free_wordlist(struct wordlist *wp)
978 struct wordlist *next;
986 #endif /* 0 */ /* PAP_SUPPORT || CHAP_SUPPORT */
988 #endif /* PPP_SUPPORT */