2 * auth.c - PPP authentication and phase control.
4 * Copyright (c) 1993 The Australian National University.
7 * Redistribution and use in source and binary forms are permitted
8 * provided that the above copyright notice and this paragraph are
9 * duplicated in all such forms and that any documentation,
10 * advertising materials, and other materials related to such
11 * distribution and use acknowledge that the software was developed
12 * by the Australian National University. The name of the University
13 * may not be used to endorse or promote products derived from this
14 * software without specific prior written permission.
15 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
17 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
19 * Copyright (c) 1989 Carnegie Mellon University.
20 * All rights reserved.
22 * Redistribution and use in source and binary forms are permitted
23 * provided that the above copyright notice and this paragraph are
24 * duplicated in all such forms and that any documentation,
25 * advertising materials, and other materials related to such
26 * distribution and use acknowledge that the software was developed
27 * by Carnegie Mellon University. The name of the
28 * University may not be used to endorse or promote products derived
29 * from this software without specific prior written permission.
30 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
31 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
32 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
35 #define RCSID "$Id: auth.c,v 1.84 2002/09/24 11:35:22 fcusack Exp $"
44 #include <sys/types.h>
46 #include <sys/socket.h>
49 #if defined(_PATH_LASTLOG) && defined(_linux_)
54 #include <netinet/in.h>
55 #include <arpa/inet.h>
58 #include <security/pam_appl.h>
64 #define PW_PPP PW_LOGIN
80 #include "pathnames.h"
82 static const char rcsid[] = RCSID;
84 /* Bits in scan_authfile return value */
85 #define NONWILD_SERVER 1
86 #define NONWILD_CLIENT 2
88 #define ISWILD(word) (word[0] == '*' && word[1] == 0)
90 /* The name by which the peer authenticated itself to us. */
91 char peer_authname[MAXNAMELEN];
93 /* Records which authentication operations haven't completed yet. */
94 static int auth_pending[NUM_PPP];
96 /* Records which authentication operations have been completed. */
97 int auth_done[NUM_PPP];
99 /* Set if we have successfully called plogin() */
100 static int logged_in;
102 /* List of addresses which the peer may use. */
103 static struct permitted_ip *addresses[NUM_PPP];
105 /* Wordlist giving addresses which the peer may use
106 without authenticating itself. */
107 static struct wordlist *noauth_addrs;
109 /* Extra options to apply, from the secrets file entry for the peer. */
110 static struct wordlist *extra_options;
112 /* Number of network protocols which we have opened. */
113 static int num_np_open;
115 /* Number of network protocols which have come up. */
116 static int num_np_up;
118 /* Set if we got the contents of passwd[] from the pap-secrets file. */
119 static int passwd_from_file;
121 /* Set if we require authentication only because we have a default route. */
122 static bool default_auth;
124 /* Hook to enable a plugin to control the idle time limit */
125 int (*idle_time_hook) __P((struct ppp_idle *)) = NULL;
127 /* Hook for a plugin to say whether we can possibly authenticate any peer */
128 int (*pap_check_hook) __P((void)) = NULL;
130 /* Hook for a plugin to check the PAP user and password */
131 int (*pap_auth_hook) __P((char *user, char *passwd, char **msgp,
132 struct wordlist **paddrs,
133 struct wordlist **popts)) = NULL;
135 /* Hook for a plugin to know about the PAP user logout */
136 void (*pap_logout_hook) __P((void)) = NULL;
138 /* Hook for a plugin to get the PAP password for authenticating us */
139 int (*pap_passwd_hook) __P((char *user, char *passwd)) = NULL;
141 /* Hook for a plugin to say whether it is OK if the peer
142 refuses to authenticate. */
143 int (*null_auth_hook) __P((struct wordlist **paddrs,
144 struct wordlist **popts)) = NULL;
146 int (*allowed_address_hook) __P((u_int32_t addr)) = NULL;
148 /* A notifier for when the peer has authenticated itself,
149 and we are proceeding to the network phase. */
150 struct notifier *auth_up_notifier = NULL;
152 /* A notifier for when the link goes down. */
153 struct notifier *link_down_notifier = NULL;
156 * This is used to ensure that we don't start an auth-up/down
157 * script while one is already running.
164 static enum script_state auth_state = s_down;
165 static enum script_state auth_script_state = s_down;
166 static pid_t auth_script_pid = 0;
168 static int used_login; /* peer authenticated against login database */
173 bool uselogin = 0; /* Use /etc/passwd for checking PAP */
174 bool cryptpap = 0; /* Passwords in pap-secrets are encrypted */
175 bool refuse_pap = 0; /* Don't wanna auth. ourselves with PAP */
176 bool refuse_chap = 0; /* Don't wanna auth. ourselves with CHAP */
178 bool refuse_mschap = 0; /* Don't wanna auth. ourselves with MS-CHAP */
179 bool refuse_mschap_v2 = 0; /* Don't wanna auth. ourselves with MS-CHAPv2 */
181 bool refuse_mschap = 1; /* Don't wanna auth. ourselves with MS-CHAP */
182 bool refuse_mschap_v2 = 1; /* Don't wanna auth. ourselves with MS-CHAPv2 */
184 bool usehostname = 0; /* Use hostname for our_name */
185 bool auth_required = 0; /* Always require authentication from peer */
186 bool allow_any_ip = 0; /* Allow peer to use any IP address */
187 bool explicit_remote = 0; /* User specified explicit remote name */
188 char remote_name[MAXNAMELEN]; /* Peer's name for authentication */
190 static char *uafname; /* name of most recent +ua file */
192 extern char *crypt __P((const char *, const char *));
194 /* Prototypes for procedures local to this file. */
196 static void network_phase __P((int));
197 static void check_idle __P((void *));
198 static void connect_time_expired __P((void *));
199 static int plogin __P((char *, char *, char **));
200 static void plogout __P((void));
201 static int null_login __P((int));
202 static int get_pap_passwd __P((char *));
203 static int have_pap_secret __P((int *));
204 static int have_chap_secret __P((char *, char *, int, int *));
205 static int ip_addr_check __P((u_int32_t, struct permitted_ip *));
206 static int scan_authfile __P((FILE *, char *, char *, char *,
207 struct wordlist **, struct wordlist **,
209 static void free_wordlist __P((struct wordlist *));
210 static void auth_script __P((char *));
211 static void auth_script_done __P((void *));
212 static void set_allowed_addrs __P((int, struct wordlist *, struct wordlist *));
213 static int some_ip_ok __P((struct wordlist *));
214 static int setupapfile __P((char **));
215 static int privgroup __P((char **));
216 static int set_noauth_addr __P((char **));
217 static void check_access __P((FILE *, char *));
218 static int wordlist_count __P((struct wordlist *));
221 static void check_maxoctets __P((void *));
225 * Authentication-related options.
227 option_t auth_options[] = {
228 { "auth", o_bool, &auth_required,
229 "Require authentication from peer", OPT_PRIO | 1 },
230 { "noauth", o_bool, &auth_required,
231 "Don't require peer to authenticate", OPT_PRIOSUB | OPT_PRIV,
233 { "require-pap", o_bool, &lcp_wantoptions[0].neg_upap,
234 "Require PAP authentication from peer",
235 OPT_PRIOSUB | 1, &auth_required },
236 { "+pap", o_bool, &lcp_wantoptions[0].neg_upap,
237 "Require PAP authentication from peer",
238 OPT_ALIAS | OPT_PRIOSUB | 1, &auth_required },
239 { "require-chap", o_bool, &auth_required,
240 "Require CHAP authentication from peer",
241 OPT_PRIOSUB | OPT_A2OR | MDTYPE_MD5,
242 &lcp_wantoptions[0].chap_mdtype },
243 { "+chap", o_bool, &auth_required,
244 "Require CHAP authentication from peer",
245 OPT_ALIAS | OPT_PRIOSUB | OPT_A2OR | MDTYPE_MD5,
246 &lcp_wantoptions[0].chap_mdtype },
248 { "require-mschap", o_bool, &auth_required,
249 "Require MS-CHAP authentication from peer",
250 OPT_PRIOSUB | OPT_A2OR | MDTYPE_MICROSOFT,
251 &lcp_wantoptions[0].chap_mdtype },
252 { "+mschap", o_bool, &auth_required,
253 "Require MS-CHAP authentication from peer",
254 OPT_ALIAS | OPT_PRIOSUB | OPT_A2OR | MDTYPE_MICROSOFT,
255 &lcp_wantoptions[0].chap_mdtype },
256 { "require-mschap-v2", o_bool, &auth_required,
257 "Require MS-CHAPv2 authentication from peer",
258 OPT_PRIOSUB | OPT_A2OR | MDTYPE_MICROSOFT_V2,
259 &lcp_wantoptions[0].chap_mdtype },
260 { "+mschap-v2", o_bool, &auth_required,
261 "Require MS-CHAPv2 authentication from peer",
262 OPT_ALIAS | OPT_PRIOSUB | OPT_A2OR | MDTYPE_MICROSOFT_V2,
263 &lcp_wantoptions[0].chap_mdtype },
266 { "refuse-pap", o_bool, &refuse_pap,
267 "Don't agree to auth to peer with PAP", 1 },
268 { "-pap", o_bool, &refuse_pap,
269 "Don't allow PAP authentication with peer", OPT_ALIAS | 1 },
270 { "refuse-chap", o_bool, &refuse_chap,
271 "Don't agree to auth to peer with CHAP",
272 OPT_A2CLRB | MDTYPE_MD5,
273 &lcp_allowoptions[0].chap_mdtype },
274 { "-chap", o_bool, &refuse_chap,
275 "Don't allow CHAP authentication with peer",
276 OPT_ALIAS | OPT_A2CLRB | MDTYPE_MD5,
277 &lcp_allowoptions[0].chap_mdtype },
279 { "refuse-mschap", o_bool, &refuse_mschap,
280 "Don't agree to auth to peer with MS-CHAP",
281 OPT_A2CLRB | MDTYPE_MICROSOFT,
282 &lcp_allowoptions[0].chap_mdtype },
283 { "-mschap", o_bool, &refuse_mschap,
284 "Don't allow MS-CHAP authentication with peer",
285 OPT_ALIAS | OPT_A2CLRB | MDTYPE_MICROSOFT,
286 &lcp_allowoptions[0].chap_mdtype },
287 { "refuse-mschap-v2", o_bool, &refuse_mschap_v2,
288 "Don't agree to auth to peer with MS-CHAPv2",
289 OPT_A2CLRB | MDTYPE_MICROSOFT_V2,
290 &lcp_allowoptions[0].chap_mdtype },
291 { "-mschap-v2", o_bool, &refuse_mschap_v2,
292 "Don't allow MS-CHAPv2 authentication with peer",
293 OPT_ALIAS | OPT_A2CLRB | MDTYPE_MICROSOFT_V2,
294 &lcp_allowoptions[0].chap_mdtype },
297 { "name", o_string, our_name,
298 "Set local name for authentication",
299 OPT_PRIO | OPT_PRIV | OPT_STATIC, NULL, MAXNAMELEN },
301 { "+ua", o_special, (void *)setupapfile,
302 "Get PAP user and password from file",
303 OPT_PRIO | OPT_A2STRVAL, &uafname },
305 { "user", o_string, user,
306 "Set name for auth with peer", OPT_PRIO | OPT_STATIC, NULL, MAXNAMELEN },
308 { "password", o_string, passwd,
309 "Password for authenticating us to the peer",
310 OPT_PRIO | OPT_STATIC | OPT_HIDE, NULL, MAXSECRETLEN },
312 { "usehostname", o_bool, &usehostname,
313 "Must use hostname for authentication", 1 },
315 { "remotename", o_string, remote_name,
316 "Set remote name for authentication", OPT_PRIO | OPT_STATIC,
317 &explicit_remote, MAXNAMELEN },
319 { "login", o_bool, &uselogin,
320 "Use system password database for PAP", 1 },
322 { "papcrypt", o_bool, &cryptpap,
323 "PAP passwords are encrypted", 1 },
325 { "privgroup", o_special, (void *)privgroup,
326 "Allow group members to use privileged options", OPT_PRIV | OPT_A2LIST },
328 { "allow-ip", o_special, (void *)set_noauth_addr,
329 "Set IP address(es) which can be used without authentication",
330 OPT_PRIV | OPT_A2LIST },
336 * setupapfile - specifies UPAP info for authenticating with peer.
344 char u[MAXNAMELEN], p[MAXSECRETLEN];
347 lcp_allowoptions[0].neg_upap = 1;
349 /* open user info file */
350 fname = strdup(*argv);
352 novm("+ua file name");
354 ufile = fopen(fname, "r");
357 option_error("unable to open user login data file %s", fname);
360 check_access(ufile, fname);
364 if (fgets(u, MAXNAMELEN - 1, ufile) == NULL
365 || fgets(p, MAXSECRETLEN - 1, ufile) == NULL){
366 option_error("unable to read user login data file %s", fname);
371 /* get rid of newlines */
373 if (l > 0 && u[l-1] == '\n')
376 if (l > 0 && p[l-1] == '\n')
379 if (override_value("user", option_priority, fname))
380 strlcpy(user, u, sizeof(user));
381 if (override_value("passwd", option_priority, fname))
382 strlcpy(passwd, p, sizeof(passwd));
389 * privgroup - allow members of the group to have privileged access.
400 option_error("group %s is unknown", *argv);
403 for (i = 0; i < ngroups; ++i) {
404 if (groups[i] == g->gr_gid) {
414 * set_noauth_addr - set address(es) that can be used without authentication.
415 * Equivalent to specifying an entry like `"" * "" addr' in pap-secrets.
418 set_noauth_addr(argv)
422 int l = strlen(addr) + 1;
425 wp = (struct wordlist *) malloc(sizeof(struct wordlist) + l);
427 novm("allow-ip argument");
428 wp->word = (char *) (wp + 1);
429 wp->next = noauth_addrs;
430 BCOPY(addr, wp->word, l);
437 * An Open on LCP has requested a change from Dead to Establish phase.
438 * Do what's necessary to bring the physical layer up.
447 * LCP has terminated the link; go to the Dead phase and take the
448 * physical layer down.
451 link_terminated(unit)
454 if (phase == PHASE_DEAD)
456 if (pap_logout_hook) {
462 new_phase(PHASE_DEAD);
463 notice("Connection terminated.");
467 * LCP has gone down; it will either die or try to re-establish.
474 struct protent *protp;
476 notify(link_down_notifier, 0);
478 if (auth_script_state == s_up && auth_script_pid == 0) {
479 update_link_stats(unit);
480 auth_script_state = s_down;
481 auth_script(_PATH_AUTHDOWN);
483 for (i = 0; (protp = protocols[i]) != NULL; ++i) {
484 if (!protp->enabled_flag)
486 if (protp->protocol != PPP_LCP && protp->lowerdown != NULL)
487 (*protp->lowerdown)(unit);
488 if (protp->protocol < 0xC000 && protp->close != NULL)
489 (*protp->close)(unit, "LCP down");
493 if (phase != PHASE_DEAD)
494 new_phase(PHASE_ESTABLISH);
498 * The link is established.
499 * Proceed to the Dead, Authenticate or Network phase as appropriate.
502 link_established(unit)
506 lcp_options *wo = &lcp_wantoptions[unit];
507 lcp_options *go = &lcp_gotoptions[unit];
508 lcp_options *ho = &lcp_hisoptions[unit];
510 struct protent *protp;
513 * Tell higher-level protocols that LCP is up.
515 for (i = 0; (protp = protocols[i]) != NULL; ++i)
516 if (protp->protocol != PPP_LCP && protp->enabled_flag
517 && protp->lowerup != NULL)
518 (*protp->lowerup)(unit);
520 if (auth_required && !(go->neg_upap || go->neg_chap)) {
522 * We wanted the peer to authenticate itself, and it refused:
523 * if we have some address(es) it can use without auth, fine,
524 * otherwise treat it as though it authenticated with PAP using
525 * a username of "" and a password of "". If that's not OK,
528 if (noauth_addrs != NULL) {
529 set_allowed_addrs(unit, NULL, NULL);
530 } else if (!wo->neg_upap || uselogin || !null_login(unit)) {
531 warn("peer refused to authenticate: terminating link");
532 lcp_close(unit, "peer refused to authenticate");
533 status = EXIT_PEER_AUTH_FAILED;
538 new_phase(PHASE_AUTHENTICATE);
542 ChapAuthPeer(unit, our_name, CHAP_DIGEST(go->chap_mdtype));
544 } else if (go->neg_upap) {
549 ChapAuthWithPeer(unit, user, CHAP_DIGEST(ho->chap_mdtype));
550 auth |= CHAP_WITHPEER;
551 } else if (ho->neg_upap) {
552 if (passwd[0] == 0) {
553 passwd_from_file = 1;
554 if (!get_pap_passwd(passwd))
555 error("No secret found for PAP login");
557 upap_authwithpeer(unit, user, passwd);
558 auth |= PAP_WITHPEER;
560 auth_pending[unit] = auth;
568 * Proceed to the network phase.
574 lcp_options *go = &lcp_gotoptions[unit];
577 * If the peer had to authenticate, run the auth-up script now.
579 if (go->neg_chap || go->neg_upap) {
580 notify(auth_up_notifier, 0);
582 if (auth_script_state == s_down && auth_script_pid == 0) {
583 auth_script_state = s_up;
584 auth_script(_PATH_AUTHUP);
590 * If we negotiated callback, do it now.
593 new_phase(PHASE_CALLBACK);
594 (*cbcp_protent.open)(unit);
600 * Process extra options from the secrets file
603 options_from_list(extra_options, 1);
604 free_wordlist(extra_options);
607 start_networks(unit);
615 struct protent *protp;
616 int ecp_required, mppe_required;
618 new_phase(PHASE_NETWORK);
620 #ifdef HAVE_MULTILINK
622 if (mp_join_bundle()) {
623 if (updetach && !nodetach)
628 #endif /* HAVE_MULTILINK */
632 set_filters(&pass_filter, &active_filter);
634 /* Start CCP and ECP */
635 for (i = 0; (protp = protocols[i]) != NULL; ++i)
636 if ((protp->protocol == PPP_ECP || protp->protocol == PPP_CCP)
637 && protp->enabled_flag && protp->open != NULL)
641 * Bring up other network protocols iff encryption is not required.
643 ecp_required = ecp_gotoptions[unit].required;
644 mppe_required = ccp_gotoptions[unit].mppe;
645 if (!ecp_required && !mppe_required)
646 continue_networks(unit);
650 continue_networks(unit)
654 struct protent *protp;
657 * Start the "real" network protocols.
659 for (i = 0; (protp = protocols[i]) != NULL; ++i)
660 if (protp->protocol < 0xC000
661 && protp->protocol != PPP_CCP && protp->protocol != PPP_ECP
662 && protp->enabled_flag && protp->open != NULL) {
667 if (num_np_open == 0)
669 lcp_close(0, "No network protocols running");
673 * The peer has failed to authenticate himself using `protocol'.
676 auth_peer_fail(unit, protocol)
680 * Authentication failure: take the link down
682 lcp_close(unit, "Authentication failed");
683 status = EXIT_PEER_AUTH_FAILED;
687 * The peer has been successfully authenticated using `protocol'.
690 auth_peer_success(unit, protocol, prot_flavor, name, namelen)
691 int unit, protocol, prot_flavor;
700 switch (prot_flavor) {
701 case CHAP_DIGEST_MD5:
702 bit |= CHAP_MD5_PEER;
708 case CHAP_MICROSOFT_V2:
709 bit |= CHAP_MS2_PEER;
718 warn("auth_peer_success: unknown protocol %x", protocol);
723 * Save the authenticated name of the peer for later.
725 if (namelen > sizeof(peer_authname) - 1)
726 namelen = sizeof(peer_authname) - 1;
727 BCOPY(name, peer_authname, namelen);
728 peer_authname[namelen] = 0;
729 script_setenv("PEERNAME", peer_authname, 0);
731 /* Save the authentication method for later. */
732 auth_done[unit] |= bit;
735 * If there is no more authentication still to be done,
736 * proceed to the network (or callback) phase.
738 if ((auth_pending[unit] &= ~bit) == 0)
743 * We have failed to authenticate ourselves to the peer using `protocol'.
746 auth_withpeer_fail(unit, protocol)
749 if (passwd_from_file)
750 BZERO(passwd, MAXSECRETLEN);
752 * We've failed to authenticate ourselves to our peer.
753 * Some servers keep sending CHAP challenges, but there
754 * is no point in persisting without any way to get updated
755 * authentication secrets.
757 lcp_close(unit, "Failed to authenticate ourselves to peer");
758 status = EXIT_AUTH_TOPEER_FAILED;
762 * We have successfully authenticated ourselves with the peer using `protocol'.
765 auth_withpeer_success(unit, protocol, prot_flavor)
766 int unit, protocol, prot_flavor;
773 switch (prot_flavor) {
774 case CHAP_DIGEST_MD5:
775 bit |= CHAP_MD5_WITHPEER;
779 bit |= CHAP_MS_WITHPEER;
781 case CHAP_MICROSOFT_V2:
782 bit |= CHAP_MS2_WITHPEER;
788 if (passwd_from_file)
789 BZERO(passwd, MAXSECRETLEN);
793 warn("auth_withpeer_success: unknown protocol %x", protocol);
797 /* Save the authentication method for later. */
798 auth_done[unit] |= bit;
801 * If there is no more authentication still being done,
802 * proceed to the network (or callback) phase.
804 if ((auth_pending[unit] &= ~bit) == 0)
810 * np_up - a network protocol has come up.
818 if (num_np_up == 0) {
820 * At this point we consider that the link has come up successfully.
824 new_phase(PHASE_RUNNING);
826 if (idle_time_hook != 0)
827 tlim = (*idle_time_hook)(NULL);
829 tlim = idle_time_limit;
831 TIMEOUT(check_idle, NULL, tlim);
834 * Set a timeout to close the connection once the maximum
835 * connect time has expired.
838 TIMEOUT(connect_time_expired, 0, maxconnect);
842 TIMEOUT(check_maxoctets, NULL, maxoctets_timeout);
846 * Detach now, if the updetach option was given.
848 if (updetach && !nodetach)
855 * np_down - a network protocol has gone down.
861 if (--num_np_up == 0) {
862 UNTIMEOUT(check_idle, NULL);
863 UNTIMEOUT(connect_time_expired, NULL);
865 UNTIMEOUT(check_maxoctets, NULL);
867 new_phase(PHASE_NETWORK);
872 * np_finished - a network protocol has finished using the link.
875 np_finished(unit, proto)
878 if (--num_np_open <= 0) {
879 /* no further use for the link: shut up shop. */
880 lcp_close(0, "No network protocols running");
892 update_link_stats(ifunit);
895 switch(maxoctets_dir) {
896 case PPP_OCTETS_DIRECTION_IN:
897 used = link_stats.bytes_in;
899 case PPP_OCTETS_DIRECTION_OUT:
900 used = link_stats.bytes_out;
902 case PPP_OCTETS_DIRECTION_MAXOVERAL:
903 case PPP_OCTETS_DIRECTION_MAXSESSION:
904 used = (link_stats.bytes_in > link_stats.bytes_out) ? link_stats.bytes_in : link_stats.bytes_out;
907 used = link_stats.bytes_in+link_stats.bytes_out;
910 diff = maxoctets - used;
912 notice("Traffic limit reached. Limit: %u Used: %u", maxoctets, used);
913 lcp_close(0, "Traffic limit");
915 status = EXIT_TRAFFIC_LIMIT;
917 TIMEOUT(check_maxoctets, NULL, maxoctets_timeout);
923 * check_idle - check whether the link has been idle for long
924 * enough that we can shut it down.
930 struct ppp_idle idle;
934 if (!get_idle_time(0, &idle))
936 if (idle_time_hook != 0) {
937 tlim = idle_time_hook(&idle);
939 itime = MIN(idle.xmit_idle, idle.recv_idle);
940 tlim = idle_time_limit - itime;
943 /* link is idle: shut it down. */
944 notice("Terminating connection due to lack of activity.");
945 lcp_close(0, "Link inactive");
947 status = EXIT_IDLE_TIMEOUT;
949 TIMEOUT(check_idle, NULL, tlim);
954 * connect_time_expired - log a message and close the connection.
957 connect_time_expired(arg)
960 info("Connect time expired");
961 lcp_close(0, "Connect time expired"); /* Close connection */
962 status = EXIT_CONNECT_TIME;
966 * auth_check_options - called to check authentication options.
971 lcp_options *wo = &lcp_wantoptions[0];
975 /* Default our_name to hostname, and user to our_name */
976 if (our_name[0] == 0 || usehostname)
977 strlcpy(our_name, hostname, sizeof(our_name));
979 strlcpy(user, our_name, sizeof(user));
982 * If we have a default route, require the peer to authenticate
983 * unless the noauth option was given or the real user is root.
985 if (!auth_required && !allow_any_ip && have_route_to(0) && !privileged) {
990 /* If we selected any CHAP flavors, we should probably negotiate it. :-) */
994 /* If authentication is required, ask peer for CHAP or PAP. */
997 if (!wo->neg_chap && !wo->neg_upap) {
998 wo->neg_chap = 1; wo->chap_mdtype = MDTYPE_ALL;
1002 wo->neg_chap = 0; wo->chap_mdtype = MDTYPE_NONE;
1007 * Check whether we have appropriate secrets to use
1008 * to authenticate the peer.
1011 can_auth = wo->neg_upap && (uselogin || have_pap_secret(&lacks_ip));
1012 if (!can_auth && (wo->neg_chap)) {
1013 can_auth = have_chap_secret((explicit_remote? remote_name: NULL),
1014 our_name, 1, &lacks_ip);
1017 if (auth_required && !can_auth && noauth_addrs == NULL) {
1020 "By default the remote system is required to authenticate itself");
1022 "(because this system has a default route to the internet)");
1023 } else if (explicit_remote)
1025 "The remote system (%s) is required to authenticate itself",
1029 "The remote system is required to authenticate itself");
1031 "but I couldn't find any suitable secret (password) for it to use to do so.");
1034 "(None of the available passwords would let it use an IP address.)");
1041 * auth_reset - called when LCP is starting negotiations to recheck
1042 * authentication options, i.e. whether we have appropriate secrets
1043 * to use for authenticating ourselves and/or the peer.
1049 lcp_options *go = &lcp_gotoptions[unit];
1050 lcp_options *ao = &lcp_allowoptions[0];
1052 ao->neg_upap = !refuse_pap && (passwd[0] != 0 || get_pap_passwd(NULL));
1053 ao->neg_chap = (!refuse_chap || !refuse_mschap || !refuse_mschap_v2)
1055 || have_chap_secret(user, (explicit_remote? remote_name: NULL),
1058 if (go->neg_upap && !uselogin && !have_pap_secret(NULL))
1061 if (!have_chap_secret((explicit_remote? remote_name: NULL),
1069 * check_passwd - Check the user name and passwd against the PAP secrets
1070 * file. If requested, also check against the system password database,
1071 * and login the user if OK.
1074 * UPAP_AUTHNAK: Authentication failed.
1075 * UPAP_AUTHACK: Authentication succeeded.
1076 * In either case, msg points to an appropriate message.
1079 check_passwd(unit, auser, userlen, apasswd, passwdlen, msg)
1090 struct wordlist *addrs = NULL, *opts = NULL;
1091 char passwd[256], user[256];
1092 char secret[MAXWORDLEN];
1093 static int attempts = 0;
1096 * Make copies of apasswd and auser, then null-terminate them.
1097 * If there are unprintable characters in the password, make
1100 slprintf(passwd, sizeof(passwd), "%.*v", passwdlen, apasswd);
1101 slprintf(user, sizeof(user), "%.*v", userlen, auser);
1105 * Check if a plugin wants to handle this.
1107 if (pap_auth_hook) {
1108 ret = (*pap_auth_hook)(user, passwd, msg, &addrs, &opts);
1111 set_allowed_addrs(unit, addrs, opts);
1112 BZERO(passwd, sizeof(passwd));
1114 free_wordlist(addrs);
1116 free_wordlist(opts);
1118 return ret? UPAP_AUTHACK: UPAP_AUTHNAK;
1123 * Open the file of pap secrets and scan for a suitable secret
1124 * for authenticating this user.
1126 filename = _PATH_UPAPFILE;
1127 addrs = opts = NULL;
1129 f = fopen(filename, "r");
1131 error("Can't open PAP password file %s: %m", filename);
1134 check_access(f, filename);
1135 if (scan_authfile(f, user, our_name, secret, &addrs, &opts, filename) < 0) {
1136 warn("no PAP secret found for %s", user);
1139 * If the secret is "@login", it means to check
1140 * the password against the login database.
1142 int login_secret = strcmp(secret, "@login") == 0;
1144 if (uselogin || login_secret) {
1145 /* login option or secret is @login */
1146 ret = plogin(user, passwd, msg);
1147 if (ret == UPAP_AUTHNAK)
1148 warn("PAP login failure for %s", user);
1152 if (secret[0] != 0 && !login_secret) {
1153 /* password given in pap-secrets - must match */
1154 if ((cryptpap || strcmp(passwd, secret) != 0)
1155 && strcmp(crypt(passwd, secret), secret) != 0) {
1157 warn("PAP authentication failure for %s", user);
1164 if (ret == UPAP_AUTHNAK) {
1166 *msg = "Login incorrect";
1168 * XXX can we ever get here more than once??
1169 * Frustrate passwd stealer programs.
1170 * Allow 10 tries, but start backing off after 3 (stolen from login).
1171 * On 10'th, drop the connection.
1173 if (attempts++ >= 10) {
1174 warn("%d LOGIN FAILURES ON %s, %s", attempts, devnam, user);
1175 lcp_close(unit, "login failed");
1178 sleep((u_int) (attempts - 3) * 5);
1180 free_wordlist(opts);
1183 attempts = 0; /* Reset count */
1186 set_allowed_addrs(unit, addrs, opts);
1190 free_wordlist(addrs);
1191 BZERO(passwd, sizeof(passwd));
1192 BZERO(secret, sizeof(secret));
1198 * This function is needed for PAM.
1202 /* Static variables used to communicate between the conversation function
1203 * and the server_login function
1205 static char *PAM_username;
1206 static char *PAM_password;
1207 static int PAM_error = 0;
1208 static pam_handle_t *pamh = NULL;
1210 /* PAM conversation function
1211 * Here we assume (for now, at least) that echo on means login name, and
1212 * echo off means password.
1215 static int PAM_conv (int num_msg, const struct pam_message **msg,
1216 struct pam_response **resp, void *appdata_ptr)
1219 struct pam_response *reply = NULL;
1221 #define COPY_STRING(s) (s) ? strdup(s) : NULL
1223 reply = malloc(sizeof(struct pam_response) * num_msg);
1224 if (!reply) return PAM_CONV_ERR;
1226 for (replies = 0; replies < num_msg; replies++) {
1227 switch (msg[replies]->msg_style) {
1228 case PAM_PROMPT_ECHO_ON:
1229 reply[replies].resp_retcode = PAM_SUCCESS;
1230 reply[replies].resp = COPY_STRING(PAM_username);
1231 /* PAM frees resp */
1233 case PAM_PROMPT_ECHO_OFF:
1234 reply[replies].resp_retcode = PAM_SUCCESS;
1235 reply[replies].resp = COPY_STRING(PAM_password);
1236 /* PAM frees resp */
1241 /* ignore it, but pam still wants a NULL response... */
1242 reply[replies].resp_retcode = PAM_SUCCESS;
1243 reply[replies].resp = NULL;
1246 /* Must be an error of some sort... */
1249 return PAM_CONV_ERR;
1256 static struct pam_conv PAM_conversation = {
1260 #endif /* USE_PAM */
1263 * plogin - Check the user name and password against the system
1264 * password database, and login the user if OK.
1267 * UPAP_AUTHNAK: Login failed.
1268 * UPAP_AUTHACK: Login succeeded.
1269 * In either case, msg points to an appropriate message.
1273 plogin(user, passwd, msg)
1283 pam_error = pam_start ("ppp", user, &PAM_conversation, &pamh);
1284 if (pam_error != PAM_SUCCESS) {
1285 *msg = (char *) pam_strerror (pamh, pam_error);
1287 return UPAP_AUTHNAK;
1290 * Define the fields for the credential validation
1293 PAM_username = user;
1294 PAM_password = passwd;
1296 pam_set_item (pamh, PAM_TTY, devnam); /* this might be useful to some modules */
1301 pam_error = pam_authenticate (pamh, PAM_SILENT);
1302 if (pam_error == PAM_SUCCESS && !PAM_error) {
1303 pam_error = pam_acct_mgmt (pamh, PAM_SILENT);
1304 if (pam_error == PAM_SUCCESS)
1305 pam_error = pam_open_session (pamh, PAM_SILENT);
1308 *msg = (char *) pam_strerror (pamh, pam_error);
1313 reopen_log(); /* apparently the PAM stuff does closelog() */
1314 PAM_username = NULL;
1315 PAM_password = NULL;
1316 if (pam_error != PAM_SUCCESS)
1317 return UPAP_AUTHNAK;
1318 #else /* #ifdef USE_PAM */
1321 * Use the non-PAM methods directly
1326 struct spwd *getspnam();
1328 struct passwd *pw = getpwnam(user);
1332 return (UPAP_AUTHNAK);
1335 spwd = getspnam(user);
1338 /* check the age of the password entry */
1339 long now = time(NULL) / 86400L;
1341 if ((spwd->sp_expire > 0 && now >= spwd->sp_expire)
1342 || ((spwd->sp_max >= 0 && spwd->sp_max < 10000)
1343 && spwd->sp_lstchg >= 0
1344 && now >= spwd->sp_lstchg + spwd->sp_max)) {
1345 warn("Password for %s has expired", user);
1346 return (UPAP_AUTHNAK);
1348 pw->pw_passwd = spwd->sp_pwdp;
1353 * If no passwd, don't let them login.
1355 if (pw->pw_passwd == NULL || strlen(pw->pw_passwd) < 2
1356 || strcmp(crypt(passwd, pw->pw_passwd), pw->pw_passwd) != 0)
1357 return (UPAP_AUTHNAK);
1359 #endif /* #ifdef USE_PAM */
1362 * Write a wtmp entry for this user.
1366 if (strncmp(tty, "/dev/", 5) == 0)
1368 logwtmp(tty, user, ifname); /* Add wtmp login entry */
1370 #if defined(_PATH_LASTLOG) && !defined(USE_PAM)
1371 if (pw != (struct passwd *)NULL) {
1375 if ((fd = open(_PATH_LASTLOG, O_RDWR, 0)) >= 0) {
1376 (void)lseek(fd, (off_t)(pw->pw_uid * sizeof(ll)), SEEK_SET);
1377 memset((void *)&ll, 0, sizeof(ll));
1378 (void)time(&ll.ll_time);
1379 (void)strncpy(ll.ll_line, tty, sizeof(ll.ll_line));
1380 (void)write(fd, (char *)&ll, sizeof(ll));
1384 #endif /* _PATH_LASTLOG and not USE_PAM */
1386 info("user %s logged in", user);
1389 return (UPAP_AUTHACK);
1393 * plogout - Logout the user.
1402 pam_error = pam_close_session (pamh, PAM_SILENT);
1403 pam_end (pamh, pam_error);
1406 /* Apparently the pam stuff does closelog(). */
1408 #else /* ! USE_PAM */
1412 if (strncmp(tty, "/dev/", 5) == 0)
1414 logwtmp(tty, "", ""); /* Wipe out utmp logout entry */
1415 #endif /* ! USE_PAM */
1421 * null_login - Check if a username of "" and a password of "" are
1422 * acceptable, and iff so, set the list of acceptable IP addresses
1432 struct wordlist *addrs, *opts;
1433 char secret[MAXWORDLEN];
1436 * Check if a plugin wants to handle this.
1440 ret = (*null_auth_hook)(&addrs, &opts);
1443 * Open the file of pap secrets and scan for a suitable secret.
1446 filename = _PATH_UPAPFILE;
1448 f = fopen(filename, "r");
1451 check_access(f, filename);
1453 i = scan_authfile(f, "", our_name, secret, &addrs, &opts, filename);
1454 ret = i >= 0 && secret[0] == 0;
1455 BZERO(secret, sizeof(secret));
1460 set_allowed_addrs(unit, addrs, opts);
1462 free_wordlist(opts);
1464 free_wordlist(addrs);
1471 * get_pap_passwd - get a password for authenticating ourselves with
1472 * our peer using PAP. Returns 1 on success, 0 if no suitable password
1474 * Assumes passwd points to MAXSECRETLEN bytes of space (if non-null).
1477 get_pap_passwd(passwd)
1483 char secret[MAXWORDLEN];
1486 * Check whether a plugin wants to supply this.
1488 if (pap_passwd_hook) {
1489 ret = (*pap_passwd_hook)(user, passwd);
1494 filename = _PATH_UPAPFILE;
1495 f = fopen(filename, "r");
1498 check_access(f, filename);
1499 ret = scan_authfile(f, user,
1500 (remote_name[0]? remote_name: NULL),
1501 secret, NULL, NULL, filename);
1506 strlcpy(passwd, secret, MAXSECRETLEN);
1507 BZERO(secret, sizeof(secret));
1513 * have_pap_secret - check whether we have a PAP file with any
1514 * secrets that we could possibly use for authenticating the peer.
1517 have_pap_secret(lacks_ipp)
1523 struct wordlist *addrs;
1525 /* let the plugin decide, if there is one */
1526 if (pap_check_hook) {
1527 ret = (*pap_check_hook)();
1532 filename = _PATH_UPAPFILE;
1533 f = fopen(filename, "r");
1537 ret = scan_authfile(f, (explicit_remote? remote_name: NULL), our_name,
1538 NULL, &addrs, NULL, filename);
1540 if (ret >= 0 && !some_ip_ok(addrs)) {
1546 free_wordlist(addrs);
1553 * have_chap_secret - check whether we have a CHAP file with a
1554 * secret that we could possibly use for authenticating `client'
1555 * on `server'. Either can be the null string, meaning we don't
1556 * know the identity yet.
1559 have_chap_secret(client, server, need_ip, lacks_ipp)
1568 struct wordlist *addrs;
1570 if (chap_check_hook) {
1571 ret = (*chap_check_hook)();
1577 filename = _PATH_CHAPFILE;
1578 f = fopen(filename, "r");
1582 if (client != NULL && client[0] == 0)
1584 else if (server != NULL && server[0] == 0)
1587 ret = scan_authfile(f, client, server, NULL, &addrs, NULL, filename);
1589 if (ret >= 0 && need_ip && !some_ip_ok(addrs)) {
1595 free_wordlist(addrs);
1602 * get_secret - open the CHAP secret file and return the secret
1603 * for authenticating the given client on the given server.
1604 * (We could be either client or server).
1607 get_secret(unit, client, server, secret, secret_len, am_server)
1618 struct wordlist *addrs, *opts;
1619 char secbuf[MAXWORDLEN];
1621 if (!am_server && passwd[0] != 0) {
1622 strlcpy(secbuf, passwd, sizeof(secbuf));
1623 } else if (!am_server && chap_passwd_hook) {
1624 if ( (*chap_passwd_hook)(client, secbuf) < 0) {
1625 error("Unable to obtain CHAP password for %s on %s from plugin",
1630 filename = _PATH_CHAPFILE;
1634 f = fopen(filename, "r");
1636 error("Can't open chap secret file %s: %m", filename);
1639 check_access(f, filename);
1641 ret = scan_authfile(f, client, server, secbuf, &addrs, &opts, filename);
1647 set_allowed_addrs(unit, addrs, opts);
1649 free_wordlist(opts);
1651 free_wordlist(addrs);
1654 len = strlen(secbuf);
1655 if (len > MAXSECRETLEN) {
1656 error("Secret for %s on %s is too long", client, server);
1659 BCOPY(secbuf, secret, len);
1660 BZERO(secbuf, sizeof(secbuf));
1667 * set_allowed_addrs() - set the list of allowed addresses.
1668 * Also looks for `--' indicating options to apply for this peer
1669 * and leaves the following words in extra_options.
1672 set_allowed_addrs(unit, addrs, opts)
1674 struct wordlist *addrs;
1675 struct wordlist *opts;
1678 struct wordlist *ap, **plink;
1679 struct permitted_ip *ip;
1680 char *ptr_word, *ptr_mask;
1683 u_int32_t a, mask, ah, offset;
1684 struct ipcp_options *wo = &ipcp_wantoptions[unit];
1685 u_int32_t suggested_ip = 0;
1687 if (addresses[unit] != NULL)
1688 free(addresses[unit]);
1689 addresses[unit] = NULL;
1690 if (extra_options != NULL)
1691 free_wordlist(extra_options);
1692 extra_options = opts;
1695 * Count the number of IP addresses given.
1697 n = wordlist_count(addrs) + wordlist_count(noauth_addrs);
1700 ip = (struct permitted_ip *) malloc((n + 1) * sizeof(struct permitted_ip));
1704 /* temporarily append the noauth_addrs list to addrs */
1705 for (plink = &addrs; *plink != NULL; plink = &(*plink)->next)
1707 *plink = noauth_addrs;
1710 for (ap = addrs; ap != NULL; ap = ap->next) {
1711 /* "-" means no addresses authorized, "*" means any address allowed */
1712 ptr_word = ap->word;
1713 if (strcmp(ptr_word, "-") == 0)
1715 if (strcmp(ptr_word, "*") == 0) {
1717 ip[n].base = ip[n].mask = 0;
1723 if (*ptr_word == '!') {
1728 mask = ~ (u_int32_t) 0;
1730 ptr_mask = strchr (ptr_word, '/');
1731 if (ptr_mask != NULL) {
1735 bit_count = (int) strtol (ptr_mask+1, &endp, 10);
1736 if (bit_count <= 0 || bit_count > 32) {
1737 warn("invalid address length %v in auth. address list",
1741 bit_count = 32 - bit_count; /* # bits in host part */
1743 offset = ifunit + 1;
1747 warn("invalid address length syntax: %v", ptr_mask+1);
1754 hp = gethostbyname(ptr_word);
1755 if (hp != NULL && hp->h_addrtype == AF_INET) {
1756 a = *(u_int32_t *)hp->h_addr;
1758 np = getnetbyname (ptr_word);
1759 if (np != NULL && np->n_addrtype == AF_INET) {
1760 a = htonl (*(u_int32_t *)np->n_net);
1761 if (ptr_mask == NULL) {
1762 /* calculate appropriate mask for net */
1765 mask = IN_CLASSA_NET;
1766 else if (IN_CLASSB(ah))
1767 mask = IN_CLASSB_NET;
1768 else if (IN_CLASSC(ah))
1769 mask = IN_CLASSC_NET;
1772 a = inet_addr (ptr_word);
1776 if (ptr_mask != NULL)
1779 if (a == (u_int32_t)-1L) {
1780 warn("unknown host %s in auth. address list", ap->word);
1784 if (offset >= ~mask) {
1785 warn("interface unit %d too large for subnet %v",
1789 a = htonl((ntohl(a) & mask) + offset);
1790 mask = ~(u_int32_t)0;
1792 ip[n].mask = htonl(mask);
1793 ip[n].base = a & ip[n].mask;
1795 if (~mask == 0 && suggested_ip == 0)
1800 ip[n].permit = 0; /* make the last entry forbid all addresses */
1801 ip[n].base = 0; /* to terminate the list */
1804 addresses[unit] = ip;
1807 * If the address given for the peer isn't authorized, or if
1808 * the user hasn't given one, AND there is an authorized address
1809 * which is a single host, then use that if we find one.
1811 if (suggested_ip != 0
1812 && (wo->hisaddr == 0 || !auth_ip_addr(unit, wo->hisaddr))) {
1813 wo->hisaddr = suggested_ip;
1815 * Do we insist on this address? No, if there are other
1816 * addresses authorized than the suggested one.
1819 wo->accept_remote = 1;
1824 * auth_ip_addr - check whether the peer is authorized to use
1825 * a given IP address. Returns 1 if authorized, 0 otherwise.
1828 auth_ip_addr(unit, addr)
1834 /* don't allow loopback or multicast address */
1835 if (bad_ip_adrs(addr))
1838 if (allowed_address_hook) {
1839 ok = allowed_address_hook(addr);
1840 if (ok >= 0) return ok;
1843 if (addresses[unit] != NULL) {
1844 ok = ip_addr_check(addr, addresses[unit]);
1850 return 0; /* no addresses authorized */
1851 return allow_any_ip || privileged || !have_route_to(addr);
1855 ip_addr_check(addr, addrs)
1857 struct permitted_ip *addrs;
1860 if ((addr & addrs->mask) == addrs->base)
1861 return addrs->permit;
1865 * bad_ip_adrs - return 1 if the IP address is one we don't want
1866 * to use, such as an address in the loopback net or a multicast address.
1867 * addr is in network byte order.
1874 return (addr >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET
1875 || IN_MULTICAST(addr) || IN_BADCLASS(addr);
1879 * some_ip_ok - check a wordlist to see if it authorizes any
1884 struct wordlist *addrs;
1886 for (; addrs != 0; addrs = addrs->next) {
1887 if (addrs->word[0] == '-')
1889 if (addrs->word[0] != '!')
1890 return 1; /* some IP address is allowed */
1896 * check_access - complain if a secret file has too-liberal permissions.
1899 check_access(f, filename)
1905 if (fstat(fileno(f), &sbuf) < 0) {
1906 warn("cannot stat secret file %s: %m", filename);
1907 } else if ((sbuf.st_mode & (S_IRWXG | S_IRWXO)) != 0) {
1908 warn("Warning - secret file %s has world and/or group access",
1915 * scan_authfile - Scan an authorization file for a secret suitable
1916 * for authenticating `client' on `server'. The return value is -1
1917 * if no secret is found, otherwise >= 0. The return value has
1918 * NONWILD_CLIENT set if the secret didn't have "*" for the client, and
1919 * NONWILD_SERVER set if the secret didn't have "*" for the server.
1920 * Any following words on the line up to a "--" (i.e. address authorization
1921 * info) are placed in a wordlist and returned in *addrs. Any
1922 * following words (extra options) are placed in a wordlist and
1923 * returned in *opts.
1924 * We assume secret is NULL or points to MAXWORDLEN bytes of space.
1927 scan_authfile(f, client, server, secret, addrs, opts, filename)
1932 struct wordlist **addrs;
1933 struct wordlist **opts;
1937 int got_flag, best_flag;
1939 struct wordlist *ap, *addr_list, *alist, **app;
1940 char word[MAXWORDLEN];
1941 char atfile[MAXWORDLEN];
1942 char lsecret[MAXWORDLEN];
1949 if (!getword(f, word, &newline, filename))
1950 return -1; /* file is empty??? */
1955 * Skip until we find a word at the start of a line.
1957 while (!newline && getword(f, word, &newline, filename))
1960 break; /* got to end of file */
1963 * Got a client - check if it's a match or a wildcard.
1966 if (client != NULL && strcmp(word, client) != 0 && !ISWILD(word)) {
1971 got_flag = NONWILD_CLIENT;
1974 * Now get a server and check if it matches.
1976 if (!getword(f, word, &newline, filename))
1980 if (!ISWILD(word)) {
1981 if (server != NULL && strcmp(word, server) != 0)
1983 got_flag |= NONWILD_SERVER;
1987 * Got some sort of a match - see if it's better than what
1990 if (got_flag <= best_flag)
1996 if (!getword(f, word, &newline, filename))
2001 if (secret != NULL) {
2003 * Special syntax: @/pathname means read secret from file.
2005 if (word[0] == '@' && word[1] == '/') {
2006 strlcpy(atfile, word+1, sizeof(atfile));
2007 if ((sf = fopen(atfile, "r")) == NULL) {
2008 warn("can't open indirect secret file %s", atfile);
2011 check_access(sf, atfile);
2012 if (!getword(sf, word, &xxx, atfile)) {
2013 warn("no secret in indirect secret file %s", atfile);
2019 strlcpy(lsecret, word, sizeof(lsecret));
2023 * Now read address authorization info and make a wordlist.
2027 if (!getword(f, word, &newline, filename) || newline)
2029 ap = (struct wordlist *)
2030 malloc(sizeof(struct wordlist) + strlen(word) + 1);
2032 novm("authorized addresses");
2033 ap->word = (char *) (ap + 1);
2034 strcpy(ap->word, word);
2041 * This is the best so far; remember it.
2043 best_flag = got_flag;
2045 free_wordlist(addr_list);
2048 strlcpy(secret, lsecret, MAXWORDLEN);
2054 /* scan for a -- word indicating the start of options */
2055 for (app = &addr_list; (ap = *app) != NULL; app = &ap->next)
2056 if (strcmp(ap->word, "--") == 0)
2058 /* ap = start of options */
2060 ap = ap->next; /* first option */
2061 free(*app); /* free the "--" word */
2062 *app = NULL; /* terminate addr list */
2066 else if (ap != NULL)
2070 else if (addr_list != NULL)
2071 free_wordlist(addr_list);
2077 * wordlist_count - return the number of items in a wordlist
2081 struct wordlist *wp;
2085 for (n = 0; wp != NULL; wp = wp->next)
2091 * free_wordlist - release memory allocated for a wordlist.
2095 struct wordlist *wp;
2097 struct wordlist *next;
2099 while (wp != NULL) {
2107 * auth_script_done - called when the auth-up or auth-down script
2111 auth_script_done(arg)
2114 auth_script_pid = 0;
2115 switch (auth_script_state) {
2117 if (auth_state == s_down) {
2118 auth_script_state = s_down;
2119 auth_script(_PATH_AUTHDOWN);
2123 if (auth_state == s_up) {
2124 auth_script_state = s_up;
2125 auth_script(_PATH_AUTHUP);
2132 * auth_script - execute a script with arguments
2133 * interface-name peer-name real-user tty speed
2145 if ((pw = getpwuid(getuid())) != NULL && pw->pw_name != NULL)
2146 user_name = pw->pw_name;
2148 slprintf(struid, sizeof(struid), "%d", getuid());
2151 slprintf(strspeed, sizeof(strspeed), "%d", baud_rate);
2155 argv[2] = peer_authname;
2156 argv[3] = user_name;
2161 auth_script_pid = run_program(script, argv, 0, auth_script_done, NULL);