1 /***********************************************************************
5 * RADIUS plugin for pppd. Performs PAP, CHAP, MS-CHAP, MS-CHAPv2
6 * authentication using RADIUS.
8 * Copyright (C) 2002 Roaring Penguin Software Inc.
10 * Based on a patch for ipppd, which is:
11 * Copyright (C) 1996, Matjaz Godec <gody@elgo.si>
12 * Copyright (C) 1996, Lars Fenneberg <in5y050@public.uni-hamburg.de>
13 * Copyright (C) 1997, Miguel A.L. Paraz <map@iphil.net>
15 * Uses radiusclient library, which is:
16 * Copyright (C) 1995,1996,1997,1998 Lars Fenneberg <lf@elemental.net>
17 * Copyright (C) 2002 Roaring Penguin Software Inc.
19 * MPPE support is by Ralf Hofmann, <ralf.hofmann@elvido.net>, with
20 * modification from Frank Cusack, <frank@google.com>.
22 * This plugin may be distributed according to the terms of the GNU
23 * General Public License, version 2 or (at your option) any later version.
25 ***********************************************************************/
26 static char const RCSID[] =
27 "$Id: radius.c,v 1.22 2004/01/11 08:01:30 paulus Exp $";
37 #include "radiusclient.h"
41 #include <sys/types.h>
47 #define MD5_HASH_SIZE 16
49 static char *config_file = NULL;
50 static int add_avp(char **);
51 static struct avpopt {
56 static option_t Options[] = {
57 { "radius-config-file", o_string, &config_file },
58 { "avpair", o_special, add_avp },
62 static int radius_secret_check(void);
63 static int radius_pap_auth(char *user,
66 struct wordlist **paddrs,
67 struct wordlist **popts);
68 static int radius_chap_verify(char *user, char *ourname, int id,
69 struct chap_digest_type *digest,
70 unsigned char *challenge,
71 unsigned char *response,
72 unsigned char *message, int message_space);
74 static void radius_ip_up(void *opaque, int arg);
75 static void radius_ip_down(void *opaque, int arg);
76 static void make_username_realm(char *user);
77 static int radius_setparams(VALUE_PAIR *vp, char *msg, REQUEST_INFO *req_info,
78 struct chap_digest_type *digest,
79 unsigned char *challenge,
80 char *message, int message_space);
81 static void radius_choose_ip(u_int32_t *addrp);
82 static int radius_init(char *msg);
83 static int get_client_port(char *ifname);
84 static int radius_allowed_address(u_int32_t addr);
85 static void radius_acct_interim(void *);
87 static int radius_setmppekeys(VALUE_PAIR *vp, REQUEST_INFO *req_info,
89 static int radius_setmppekeys2(VALUE_PAIR *vp, REQUEST_INFO *req_info);
93 #define MAXSESSIONID 32
97 #define MAXCLASSLEN 500
100 struct radius_state {
101 int accounting_started;
108 char user[MAXNAMELEN];
109 char config_file[MAXPATHLEN];
110 char session_id[MAXSESSIONID + 1];
112 int acct_interim_interval;
113 SERVER *authserver; /* Authentication server to use */
114 SERVER *acctserver; /* Accounting server to use */
116 char class[MAXCLASSLEN];
117 VALUE_PAIR *avp; /* Additional (user supplied) vp's to send to server */
120 void (*radius_attributes_hook)(VALUE_PAIR *) = NULL;
122 /* The pre_auth_hook MAY set authserver and acctserver if it wants.
123 In that case, they override the values in the radiusclient.conf file */
124 void (*radius_pre_auth_hook)(char const *user,
126 SERVER **acctserver) = NULL;
128 static struct radius_state rstate;
130 char pppd_version[] = VERSION;
132 /**********************************************************************
133 * %FUNCTION: plugin_init
139 * Initializes RADIUS plugin.
140 ***********************************************************************/
144 pap_check_hook = radius_secret_check;
145 pap_auth_hook = radius_pap_auth;
147 chap_check_hook = radius_secret_check;
148 chap_verify_hook = radius_chap_verify;
150 ip_choose_hook = radius_choose_ip;
151 allowed_address_hook = radius_allowed_address;
153 add_notifier(&ip_up_notifier, radius_ip_up, NULL);
154 add_notifier(&ip_down_notifier, radius_ip_down, NULL);
156 memset(&rstate, 0, sizeof(rstate));
158 strlcpy(rstate.config_file, "/etc/radiusclient/radiusclient.conf",
159 sizeof(rstate.config_file));
161 add_options(Options);
163 info("RADIUS plugin initialized.");
166 /**********************************************************************
169 * argv -- the <attribute=value> pair to add
173 * Adds an av pair to be passed on to the RADIUS server on each request.
174 ***********************************************************************/
178 struct avpopt *p = malloc(sizeof(struct avpopt));
180 /* Append to a list of vp's for later parsing */
181 p->vpstr = strdup(*argv);
188 /**********************************************************************
189 * %FUNCTION: radius_secret_check
193 * 1 -- we are ALWAYS willing to supply a secret. :-)
195 * Tells pppd that we will try to authenticate the peer, and not to
196 * worry about looking in /etc/ppp/*-secrets
197 ***********************************************************************/
199 radius_secret_check(void)
204 /**********************************************************************
205 * %FUNCTION: radius_choose_ip
207 * addrp -- where to store the IP address
211 * If RADIUS server has specified an IP address, it is stored in *addrp.
212 ***********************************************************************/
214 radius_choose_ip(u_int32_t *addrp)
216 if (rstate.choose_ip) {
217 *addrp = rstate.ip_addr;
221 /**********************************************************************
222 * %FUNCTION: radius_pap_auth
224 * user -- user-name of peer
225 * passwd -- password supplied by peer
226 * msgp -- Message which will be sent in PAP response
227 * paddrs -- set to a list of possible peer IP addresses
228 * popts -- set to a list of additional pppd options
230 * 1 if we can authenticate, -1 if we cannot.
232 * Performs PAP authentication using RADIUS
233 ***********************************************************************/
235 radius_pap_auth(char *user,
238 struct wordlist **paddrs,
239 struct wordlist **popts)
241 VALUE_PAIR *send, *received;
244 static char radius_msg[BUF_LEN];
249 if (radius_init(radius_msg) < 0) {
253 /* Put user with potentially realm added in rstate.user */
254 make_username_realm(user);
256 if (radius_pre_auth_hook) {
257 radius_pre_auth_hook(rstate.user,
265 /* Hack... the "port" is the ppp interface number. Should really be
267 rstate.client_port = get_client_port(ifname);
270 rc_avpair_add(&send, PW_SERVICE_TYPE, &av_type, 0, VENDOR_NONE);
273 rc_avpair_add(&send, PW_FRAMED_PROTOCOL, &av_type, 0, VENDOR_NONE);
275 rc_avpair_add(&send, PW_USER_NAME, rstate.user , 0, VENDOR_NONE);
276 rc_avpair_add(&send, PW_USER_PASSWORD, passwd, 0, VENDOR_NONE);
277 if (*remote_number) {
278 rc_avpair_add(&send, PW_CALLING_STATION_ID, remote_number, 0,
282 /* Add user specified vp's */
284 rc_avpair_insert(&send, NULL, rc_avpair_copy(rstate.avp));
286 if (rstate.authserver) {
287 result = rc_auth_using_server(rstate.authserver,
288 rstate.client_port, send,
289 &received, radius_msg, NULL);
291 result = rc_auth(rstate.client_port, send, &received, radius_msg, NULL);
294 if (result == OK_RC) {
295 if (radius_setparams(received, radius_msg, NULL, NULL, NULL, NULL, 0) < 0) {
300 /* free value pairs */
301 rc_avpair_free(received);
302 rc_avpair_free(send);
304 return (result == OK_RC) ? 1 : 0;
307 /**********************************************************************
308 * %FUNCTION: radius_chap_verify
310 * user -- name of the peer
311 * ourname -- name for this machine
312 * id -- the ID byte in the challenge
313 * digest -- points to the structure representing the digest type
314 * challenge -- the challenge string we sent (length in first byte)
315 * response -- the response (hash) the peer sent back (length in 1st byte)
316 * message -- space for a message to be returned to the peer
317 * message_space -- number of bytes available at *message.
319 * 1 if the response is good, 0 if it is bad
321 * Performs CHAP, MS-CHAP and MS-CHAPv2 authentication using RADIUS.
322 ***********************************************************************/
324 radius_chap_verify(char *user, char *ourname, int id,
325 struct chap_digest_type *digest,
326 unsigned char *challenge, unsigned char *response,
327 unsigned char *message, int message_space)
329 VALUE_PAIR *send, *received;
331 static char radius_msg[BUF_LEN];
333 int challenge_len, response_len;
334 u_char cpassword[MAX_RESPONSE_LEN + 1];
336 /* Need the RADIUS secret and Request Authenticator to decode MPPE */
337 REQUEST_INFO request_info, *req_info = &request_info;
339 REQUEST_INFO *req_info = NULL;
342 challenge_len = *challenge++;
343 response_len = *response++;
347 if (radius_init(radius_msg) < 0) {
348 error("%s", radius_msg);
352 /* return error for types we can't handle */
353 if ((digest->code != CHAP_MD5)
355 && (digest->code != CHAP_MICROSOFT)
356 && (digest->code != CHAP_MICROSOFT_V2)
359 error("RADIUS: Challenge type %u unsupported", digest->code);
363 /* Put user with potentially realm added in rstate.user */
364 if (!rstate.done_chap_once) {
365 make_username_realm(user);
366 rstate.client_port = get_client_port (ifname);
367 if (radius_pre_auth_hook) {
368 radius_pre_auth_hook(rstate.user,
374 send = received = NULL;
377 rc_avpair_add (&send, PW_SERVICE_TYPE, &av_type, 0, VENDOR_NONE);
380 rc_avpair_add (&send, PW_FRAMED_PROTOCOL, &av_type, 0, VENDOR_NONE);
382 rc_avpair_add (&send, PW_USER_NAME, rstate.user , 0, VENDOR_NONE);
385 * add the challenge and response fields
387 switch (digest->code) {
389 /* CHAP-Challenge and CHAP-Password */
390 if (response_len != MD5_HASH_SIZE)
393 memcpy(&cpassword[1], response, MD5_HASH_SIZE);
395 rc_avpair_add(&send, PW_CHAP_CHALLENGE,
396 challenge, challenge_len, VENDOR_NONE);
397 rc_avpair_add(&send, PW_CHAP_PASSWORD,
398 cpassword, MD5_HASH_SIZE + 1, VENDOR_NONE);
404 /* MS-CHAP-Challenge and MS-CHAP-Response */
405 MS_ChapResponse *rmd = (MS_ChapResponse *) response;
406 u_char *p = cpassword;
408 if (response_len != MS_CHAP_RESPONSE_LEN)
411 /* The idiots use a different field order in RADIUS than PPP */
412 memcpy(p, rmd->UseNT, sizeof(rmd->UseNT));
413 p += sizeof(rmd->UseNT);
414 memcpy(p, rmd->LANManResp, sizeof(rmd->LANManResp));
415 p += sizeof(rmd->LANManResp);
416 memcpy(p, rmd->NTResp, sizeof(rmd->NTResp));
418 rc_avpair_add(&send, PW_MS_CHAP_CHALLENGE,
419 challenge, challenge_len, VENDOR_MICROSOFT);
420 rc_avpair_add(&send, PW_MS_CHAP_RESPONSE,
421 cpassword, MS_CHAP_RESPONSE_LEN + 1, VENDOR_MICROSOFT);
425 case CHAP_MICROSOFT_V2:
427 /* MS-CHAP-Challenge and MS-CHAP2-Response */
428 MS_Chap2Response *rmd = (MS_Chap2Response *) response;
429 u_char *p = cpassword;
431 if (response_len != MS_CHAP2_RESPONSE_LEN)
434 /* The idiots use a different field order in RADIUS than PPP */
435 memcpy(p, rmd->Flags, sizeof(rmd->Flags));
436 p += sizeof(rmd->Flags);
437 memcpy(p, rmd->PeerChallenge, sizeof(rmd->PeerChallenge));
438 p += sizeof(rmd->PeerChallenge);
439 memcpy(p, rmd->Reserved, sizeof(rmd->Reserved));
440 p += sizeof(rmd->Reserved);
441 memcpy(p, rmd->NTResp, sizeof(rmd->NTResp));
443 rc_avpair_add(&send, PW_MS_CHAP_CHALLENGE,
444 challenge, challenge_len, VENDOR_MICROSOFT);
445 rc_avpair_add(&send, PW_MS_CHAP2_RESPONSE,
446 cpassword, MS_CHAP2_RESPONSE_LEN + 1, VENDOR_MICROSOFT);
452 if (*remote_number) {
453 rc_avpair_add(&send, PW_CALLING_STATION_ID, remote_number, 0,
457 /* Add user specified vp's */
459 rc_avpair_insert(&send, NULL, rc_avpair_copy(rstate.avp));
462 * make authentication with RADIUS server
465 if (rstate.authserver) {
466 result = rc_auth_using_server(rstate.authserver,
467 rstate.client_port, send,
468 &received, radius_msg, req_info);
470 result = rc_auth(rstate.client_port, send, &received, radius_msg,
474 if (result == OK_RC) {
475 if (!rstate.done_chap_once) {
476 if (radius_setparams(received, radius_msg, req_info, digest,
477 challenge, message, message_space) < 0) {
478 error("%s", radius_msg);
481 rstate.done_chap_once = 1;
486 rc_avpair_free(received);
487 rc_avpair_free (send);
488 return (result == OK_RC);
491 /**********************************************************************
492 * %FUNCTION: make_username_realm
494 * user -- the user given to pppd
498 * Copies user into rstate.user. If it lacks a realm (no "@domain" part),
499 * then the default realm from the radiusclient config file is added.
500 ***********************************************************************/
502 make_username_realm(char *user)
506 if ( user != NULL ) {
507 strlcpy(rstate.user, user, sizeof(rstate.user));
512 default_realm = rc_conf_str("default_realm");
514 if (!strchr(rstate.user, '@') &&
516 (*default_realm != '\0')) {
517 strlcat(rstate.user, "@", sizeof(rstate.user));
518 strlcat(rstate.user, default_realm, sizeof(rstate.user));
522 /**********************************************************************
523 * %FUNCTION: radius_setparams
525 * vp -- received value-pairs
526 * msg -- buffer in which to place error message. Holds up to BUF_LEN chars
528 * >= 0 on success; -1 on failure
530 * Parses attributes sent by RADIUS server and sets them in pppd.
531 ***********************************************************************/
533 radius_setparams(VALUE_PAIR *vp, char *msg, REQUEST_INFO *req_info,
534 struct chap_digest_type *digest, unsigned char *challenge,
535 char *message, int message_space)
538 int ms_chap2_success = 0;
540 int mppe_enc_keys = 0; /* whether or not these were received */
541 int mppe_enc_policy = 0;
542 int mppe_enc_types = 0;
545 /* Send RADIUS attributes to anyone else who might be interested */
546 if (radius_attributes_hook) {
547 (*radius_attributes_hook)(vp);
551 * service type (if not framed then quit),
552 * new IP address (RADIUS can define static IP for some users),
556 if (vp->vendorcode == VENDOR_NONE) {
557 switch (vp->attribute) {
558 case PW_SERVICE_TYPE:
559 /* check for service type */
560 /* if not FRAMED then exit */
561 if (vp->lvalue != PW_FRAMED) {
562 slprintf(msg, BUF_LEN, "RADIUS: wrong service type %ld for %s",
563 vp->lvalue, rstate.user);
568 case PW_FRAMED_PROTOCOL:
569 /* check for framed protocol type */
570 /* if not PPP then also exit */
571 if (vp->lvalue != PW_PPP) {
572 slprintf(msg, BUF_LEN, "RADIUS: wrong framed protocol %ld for %s",
573 vp->lvalue, rstate.user);
578 case PW_SESSION_TIMEOUT:
579 /* Session timeout */
580 maxconnect = vp->lvalue;
583 case PW_SESSION_OCTETS_LIMIT:
584 /* Session traffic limit */
585 maxoctets = vp->lvalue;
587 case PW_OCTETS_DIRECTION:
588 /* Session traffic limit direction check */
589 maxoctets_dir = ( vp->lvalue > 4 ) ? 0 : vp->lvalue ;
592 case PW_ACCT_INTERIM_INTERVAL:
593 /* Send accounting updates every few seconds */
594 rstate.acct_interim_interval = vp->lvalue;
595 /* RFC says it MUST NOT be less than 60 seconds */
596 /* We use "0" to signify not sending updates */
597 if (rstate.acct_interim_interval &&
598 rstate.acct_interim_interval < 60) {
599 rstate.acct_interim_interval = 60;
602 case PW_FRAMED_IP_ADDRESS:
603 /* seting up remote IP addresses */
605 if (remote == 0xffffffff) {
606 /* 0xffffffff means user should be allowed to select one */
607 rstate.any_ip_addr_ok = 1;
608 } else if (remote != 0xfffffffe) {
609 /* 0xfffffffe means NAS should select an ip address */
610 remote = htonl(vp->lvalue);
611 if (bad_ip_adrs (remote)) {
612 slprintf(msg, BUF_LEN, "RADIUS: bad remote IP address %I for %s",
613 remote, rstate.user);
616 rstate.choose_ip = 1;
617 rstate.ip_addr = remote;
621 /* Save Class attribute to pass it in accounting request */
622 if (vp->lvalue <= MAXCLASSLEN) {
623 rstate.class_len=vp->lvalue;
624 memcpy(rstate.class, vp->strvalue, rstate.class_len);
625 } /* else too big for our buffer - ignore it */
631 } else if (vp->vendorcode == VENDOR_MICROSOFT) {
632 switch (vp->attribute) {
633 case PW_MS_CHAP2_SUCCESS:
634 if ((vp->lvalue != 43) || strncmp(vp->strvalue + 1, "S=", 2)) {
635 slprintf(msg,BUF_LEN,"RADIUS: bad MS-CHAP2-Success packet");
639 strlcpy(message, vp->strvalue + 1, message_space);
640 ms_chap2_success = 1;
644 case PW_MS_CHAP_MPPE_KEYS:
645 if (radius_setmppekeys(vp, req_info, challenge) < 0) {
646 slprintf(msg, BUF_LEN,
647 "RADIUS: bad MS-CHAP-MPPE-Keys attribute");
653 case PW_MS_MPPE_SEND_KEY:
654 case PW_MS_MPPE_RECV_KEY:
655 if (radius_setmppekeys2(vp, req_info) < 0) {
656 slprintf(msg, BUF_LEN,
657 "RADIUS: bad MS-MPPE-%s-Key attribute",
658 (vp->attribute == PW_MS_MPPE_SEND_KEY)?
665 case PW_MS_MPPE_ENCRYPTION_POLICY:
666 mppe_enc_policy = vp->lvalue; /* save for later */
669 case PW_MS_MPPE_ENCRYPTION_TYPES:
670 mppe_enc_types = vp->lvalue; /* save for later */
675 case PW_MS_PRIMARY_DNS_SERVER:
676 case PW_MS_SECONDARY_DNS_SERVER:
677 case PW_MS_PRIMARY_NBNS_SERVER:
678 case PW_MS_SECONDARY_NBNS_SERVER:
687 /* Require a valid MS-CHAP2-SUCCESS for MS-CHAPv2 auth */
688 if (digest && (digest->code == CHAP_MICROSOFT_V2) && !ms_chap2_success)
693 * Require both policy and key attributes to indicate a valid key.
694 * Note that if the policy value was '0' we don't set the key!
696 if (mppe_enc_policy && mppe_enc_keys) {
698 /* Set/modify allowed encryption types. */
700 set_mppe_enc_types(mppe_enc_policy, mppe_enc_types);
708 /**********************************************************************
709 * %FUNCTION: radius_setmppekeys
711 * vp -- value pair holding MS-CHAP-MPPE-KEYS attribute
712 * req_info -- radius request information used for encryption
714 * >= 0 on success; -1 on failure
716 * Decrypt the "key" provided by the RADIUS server for MPPE encryption.
718 ***********************************************************************/
720 radius_setmppekeys(VALUE_PAIR *vp, REQUEST_INFO *req_info,
721 unsigned char *challenge)
728 if (vp->lvalue != 32) {
729 error("RADIUS: Incorrect attribute length (%d) for MS-CHAP-MPPE-Keys",
734 memcpy(plain, vp->strvalue, sizeof(plain));
737 MD5Update(&Context, req_info->secret, strlen(req_info->secret));
738 MD5Update(&Context, req_info->request_vector, AUTH_VECTOR_LEN);
739 MD5Final(buf, &Context);
741 for (i = 0; i < 16; i++)
745 MD5Update(&Context, req_info->secret, strlen(req_info->secret));
746 MD5Update(&Context, vp->strvalue, 16);
747 MD5Final(buf, &Context);
749 for(i = 0; i < 16; i++)
750 plain[i + 16] ^= buf[i];
753 * Annoying. The "key" returned is just the NTPasswordHashHash, which
754 * the NAS (us) doesn't need; we only need the start key. So we have
755 * to generate the start key, sigh. NB: We do not support the LM-Key.
757 mppe_set_keys(challenge, &plain[8]);
762 /**********************************************************************
763 * %FUNCTION: radius_setmppekeys2
765 * vp -- value pair holding MS-MPPE-SEND-KEY or MS-MPPE-RECV-KEY attribute
766 * req_info -- radius request information used for encryption
768 * >= 0 on success; -1 on failure
770 * Decrypt the key provided by the RADIUS server for MPPE encryption.
772 ***********************************************************************/
774 radius_setmppekeys2(VALUE_PAIR *vp, REQUEST_INFO *req_info)
778 u_char *salt = vp->strvalue;
779 u_char *crypt = vp->strvalue + 2;
781 u_char buf[MD5_HASH_SIZE];
784 if (vp->attribute == PW_MS_MPPE_RECV_KEY)
787 if (vp->lvalue != 34) {
788 error("RADIUS: Incorrect attribute length (%d) for MS-MPPE-%s-Key",
793 if ((salt[0] & 0x80) == 0) {
794 error("RADIUS: Illegal salt value for MS-MPPE-%s-Key attribute", type);
798 memcpy(plain, crypt, 32);
801 MD5Update(&Context, req_info->secret, strlen(req_info->secret));
802 MD5Update(&Context, req_info->request_vector, AUTH_VECTOR_LEN);
803 MD5Update(&Context, salt, 2);
804 MD5Final(buf, &Context);
806 for (i = 0; i < 16; i++)
809 if (plain[0] != sizeof(mppe_send_key) /* 16 */) {
810 error("RADIUS: Incorrect key length (%d) for MS-MPPE-%s-Key attribute",
811 (int) plain[0], type);
816 MD5Update(&Context, req_info->secret, strlen(req_info->secret));
817 MD5Update(&Context, crypt, 16);
818 MD5Final(buf, &Context);
820 plain[16] ^= buf[0]; /* only need the first byte */
822 if (vp->attribute == PW_MS_MPPE_SEND_KEY)
823 memcpy(mppe_send_key, plain + 1, 16);
825 memcpy(mppe_recv_key, plain + 1, 16);
831 /**********************************************************************
832 * %FUNCTION: radius_acct_start
838 * Sends a "start" accounting message to the RADIUS server.
839 ***********************************************************************/
841 radius_acct_start(void)
845 VALUE_PAIR *send = NULL;
846 ipcp_options *ho = &ipcp_hisoptions[0];
849 if (!rstate.initialized) {
853 rstate.start_time = time(NULL);
855 strncpy(rstate.session_id, rc_mksid(), sizeof(rstate.session_id));
857 rc_avpair_add(&send, PW_ACCT_SESSION_ID,
858 rstate.session_id, 0, VENDOR_NONE);
859 rc_avpair_add(&send, PW_USER_NAME,
860 rstate.user, 0, VENDOR_NONE);
862 if (rstate.class_len > 0)
863 rc_avpair_add(&send, PW_CLASS,
864 rstate.class, rstate.class_len, VENDOR_NONE);
866 av_type = PW_STATUS_START;
867 rc_avpair_add(&send, PW_ACCT_STATUS_TYPE, &av_type, 0, VENDOR_NONE);
870 rc_avpair_add(&send, PW_SERVICE_TYPE, &av_type, 0, VENDOR_NONE);
873 rc_avpair_add(&send, PW_FRAMED_PROTOCOL, &av_type, 0, VENDOR_NONE);
875 if (*remote_number) {
876 rc_avpair_add(&send, PW_CALLING_STATION_ID,
877 remote_number, 0, VENDOR_NONE);
881 rc_avpair_add(&send, PW_ACCT_AUTHENTIC, &av_type, 0, VENDOR_NONE);
885 rc_avpair_add(&send, PW_NAS_PORT_TYPE, &av_type, 0, VENDOR_NONE);
887 hisaddr = ho->hisaddr;
888 av_type = htonl(hisaddr);
889 rc_avpair_add(&send, PW_FRAMED_IP_ADDRESS , &av_type , 0, VENDOR_NONE);
891 /* Add user specified vp's */
893 rc_avpair_insert(&send, NULL, rc_avpair_copy(rstate.avp));
895 if (rstate.acctserver) {
896 result = rc_acct_using_server(rstate.acctserver,
897 rstate.client_port, send);
899 result = rc_acct(rstate.client_port, send);
902 rc_avpair_free(send);
904 if (result != OK_RC) {
905 /* RADIUS server could be down so make this a warning */
907 "Accounting START failed for %s", rstate.user);
909 rstate.accounting_started = 1;
910 /* Kick off periodic accounting reports */
911 if (rstate.acct_interim_interval) {
912 TIMEOUT(radius_acct_interim, NULL, rstate.acct_interim_interval);
917 /**********************************************************************
918 * %FUNCTION: radius_acct_stop
924 * Sends a "stop" accounting message to the RADIUS server.
925 ***********************************************************************/
927 radius_acct_stop(void)
930 VALUE_PAIR *send = NULL;
931 ipcp_options *ho = &ipcp_hisoptions[0];
935 if (!rstate.initialized) {
939 if (!rstate.accounting_started) {
943 rstate.accounting_started = 0;
944 rc_avpair_add(&send, PW_ACCT_SESSION_ID, rstate.session_id,
947 rc_avpair_add(&send, PW_USER_NAME, rstate.user, 0, VENDOR_NONE);
949 av_type = PW_STATUS_STOP;
950 rc_avpair_add(&send, PW_ACCT_STATUS_TYPE, &av_type, 0, VENDOR_NONE);
953 rc_avpair_add(&send, PW_SERVICE_TYPE, &av_type, 0, VENDOR_NONE);
956 rc_avpair_add(&send, PW_FRAMED_PROTOCOL, &av_type, 0, VENDOR_NONE);
959 rc_avpair_add(&send, PW_ACCT_AUTHENTIC, &av_type, 0, VENDOR_NONE);
962 if (link_stats_valid) {
963 av_type = link_connect_time;
964 rc_avpair_add(&send, PW_ACCT_SESSION_TIME, &av_type, 0, VENDOR_NONE);
966 av_type = link_stats.bytes_out;
967 rc_avpair_add(&send, PW_ACCT_OUTPUT_OCTETS, &av_type, 0, VENDOR_NONE);
969 av_type = link_stats.bytes_in;
970 rc_avpair_add(&send, PW_ACCT_INPUT_OCTETS, &av_type, 0, VENDOR_NONE);
972 av_type = link_stats.pkts_out;
973 rc_avpair_add(&send, PW_ACCT_OUTPUT_PACKETS, &av_type, 0, VENDOR_NONE);
975 av_type = link_stats.pkts_in;
976 rc_avpair_add(&send, PW_ACCT_INPUT_PACKETS, &av_type, 0, VENDOR_NONE);
979 if (*remote_number) {
980 rc_avpair_add(&send, PW_CALLING_STATION_ID,
981 remote_number, 0, VENDOR_NONE);
985 rc_avpair_add(&send, PW_NAS_PORT_TYPE, &av_type, 0, VENDOR_NONE);
987 hisaddr = ho->hisaddr;
988 av_type = htonl(hisaddr);
989 rc_avpair_add(&send, PW_FRAMED_IP_ADDRESS , &av_type , 0, VENDOR_NONE);
991 /* Add user specified vp's */
993 rc_avpair_insert(&send, NULL, rc_avpair_copy(rstate.avp));
995 if (rstate.acctserver) {
996 result = rc_acct_using_server(rstate.acctserver,
997 rstate.client_port, send);
999 result = rc_acct(rstate.client_port, send);
1002 if (result != OK_RC) {
1003 /* RADIUS server could be down so make this a warning */
1005 "Accounting STOP failed for %s", rstate.user);
1007 rc_avpair_free(send);
1010 /**********************************************************************
1011 * %FUNCTION: radius_acct_interim
1017 * Sends an interim accounting message to the RADIUS server
1018 ***********************************************************************/
1020 radius_acct_interim(void *ignored)
1023 VALUE_PAIR *send = NULL;
1024 ipcp_options *ho = &ipcp_hisoptions[0];
1028 if (!rstate.initialized) {
1032 if (!rstate.accounting_started) {
1036 rc_avpair_add(&send, PW_ACCT_SESSION_ID, rstate.session_id,
1039 rc_avpair_add(&send, PW_USER_NAME, rstate.user, 0, VENDOR_NONE);
1041 av_type = PW_STATUS_ALIVE;
1042 rc_avpair_add(&send, PW_ACCT_STATUS_TYPE, &av_type, 0, VENDOR_NONE);
1044 av_type = PW_FRAMED;
1045 rc_avpair_add(&send, PW_SERVICE_TYPE, &av_type, 0, VENDOR_NONE);
1048 rc_avpair_add(&send, PW_FRAMED_PROTOCOL, &av_type, 0, VENDOR_NONE);
1050 av_type = PW_RADIUS;
1051 rc_avpair_add(&send, PW_ACCT_AUTHENTIC, &av_type, 0, VENDOR_NONE);
1053 /* Update link stats */
1054 update_link_stats(0);
1056 if (link_stats_valid) {
1057 link_stats_valid = 0; /* Force later code to update */
1059 av_type = link_connect_time;
1060 rc_avpair_add(&send, PW_ACCT_SESSION_TIME, &av_type, 0, VENDOR_NONE);
1062 av_type = link_stats.bytes_out;
1063 rc_avpair_add(&send, PW_ACCT_OUTPUT_OCTETS, &av_type, 0, VENDOR_NONE);
1065 av_type = link_stats.bytes_in;
1066 rc_avpair_add(&send, PW_ACCT_INPUT_OCTETS, &av_type, 0, VENDOR_NONE);
1068 av_type = link_stats.pkts_out;
1069 rc_avpair_add(&send, PW_ACCT_OUTPUT_PACKETS, &av_type, 0, VENDOR_NONE);
1071 av_type = link_stats.pkts_in;
1072 rc_avpair_add(&send, PW_ACCT_INPUT_PACKETS, &av_type, 0, VENDOR_NONE);
1075 if (*remote_number) {
1076 rc_avpair_add(&send, PW_CALLING_STATION_ID,
1077 remote_number, 0, VENDOR_NONE);
1081 rc_avpair_add(&send, PW_NAS_PORT_TYPE, &av_type, 0, VENDOR_NONE);
1083 hisaddr = ho->hisaddr;
1084 av_type = htonl(hisaddr);
1085 rc_avpair_add(&send, PW_FRAMED_IP_ADDRESS , &av_type , 0, VENDOR_NONE);
1087 /* Add user specified vp's */
1089 rc_avpair_insert(&send, NULL, rc_avpair_copy(rstate.avp));
1091 if (rstate.acctserver) {
1092 result = rc_acct_using_server(rstate.acctserver,
1093 rstate.client_port, send);
1095 result = rc_acct(rstate.client_port, send);
1098 if (result != OK_RC) {
1099 /* RADIUS server could be down so make this a warning */
1101 "Interim accounting failed for %s", rstate.user);
1103 rc_avpair_free(send);
1105 /* Schedule another one */
1106 TIMEOUT(radius_acct_interim, NULL, rstate.acct_interim_interval);
1109 /**********************************************************************
1110 * %FUNCTION: radius_ip_up
1117 * Called when IPCP is up. We'll do a start-accounting record.
1118 ***********************************************************************/
1120 radius_ip_up(void *opaque, int arg)
1122 radius_acct_start();
1125 /**********************************************************************
1126 * %FUNCTION: radius_ip_down
1133 * Called when IPCP is down. We'll do a stop-accounting record.
1134 ***********************************************************************/
1136 radius_ip_down(void *opaque, int arg)
1141 /**********************************************************************
1142 * %FUNCTION: radius_init
1144 * msg -- buffer of size BUF_LEN for error message
1146 * negative on failure; non-negative on success
1148 * Initializes radiusclient library
1149 ***********************************************************************/
1151 radius_init(char *msg)
1153 if (rstate.initialized) {
1157 if (config_file && *config_file) {
1158 strlcpy(rstate.config_file, config_file, MAXPATHLEN-1);
1161 rstate.initialized = 1;
1163 if (rc_read_config(rstate.config_file) != 0) {
1164 slprintf(msg, BUF_LEN, "RADIUS: Can't read config file %s",
1165 rstate.config_file);
1169 if (rc_read_dictionary(rc_conf_str("dictionary")) != 0) {
1170 slprintf(msg, BUF_LEN, "RADIUS: Can't read dictionary file %s",
1171 rc_conf_str("dictionary"));
1175 if (rc_read_mapfile(rc_conf_str("mapfile")) != 0) {
1176 slprintf(msg, BUF_LEN, "RADIUS: Can't read map file %s",
1177 rc_conf_str("mapfile"));
1181 /* Add av pairs saved during option parsing */
1183 struct avpopt *n = avpopt->next;
1185 rc_avpair_parse(avpopt->vpstr, &rstate.avp);
1186 free(avpopt->vpstr);
1193 /**********************************************************************
1194 * %FUNCTION: get_client_port
1196 * ifname -- PPP interface name (e.g. "ppp7")
1198 * The NAS port number (e.g. 7)
1200 * Extracts the port number from the interface name
1201 ***********************************************************************/
1203 get_client_port(char *ifname)
1206 if (sscanf(ifname, "ppp%d", &port) == 1) {
1209 return rc_map2id(ifname);
1212 /**********************************************************************
1213 * %FUNCTION: radius_allowed_address
1215 * addr -- IP address
1217 * 1 if we're allowed to use that IP address; 0 if not; -1 if we do
1219 ***********************************************************************/
1221 radius_allowed_address(u_int32_t addr)
1223 ipcp_options *wo = &ipcp_wantoptions[0];
1225 if (!rstate.choose_ip) {
1226 /* If RADIUS server said any address is OK, then fine... */
1227 if (rstate.any_ip_addr_ok) {
1231 /* Sigh... if an address was supplied for remote host in pppd
1232 options, it has to match that. */
1233 if (wo->hisaddr != 0 && wo->hisaddr == addr) {
1239 if (addr == rstate.ip_addr) return 1;
1243 /* Useful for other plugins */
1244 char *radius_logged_in_user(void)