2 * valuepair.c Valuepair functions that are radiusd-specific
3 * and as such do not belong in the library.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 * Copyright 2000 The FreeRADIUS server project
22 * Copyright 2000 Alan DeKok <aland@ox.org>
25 static const char rcsid[] = "$Id$";
28 #include "libradius.h"
34 #ifdef HAVE_NETINET_IN_H
35 # include <netinet/in.h>
42 * For POSIX Regular expressions.
43 * (0) Means no extended regular expressions.
44 * REG_EXTENDED means use extended regular expressions.
47 #define REG_EXTENDED (0)
60 void *instance; /* module instance */
61 RAD_COMPARE_FUNC compare;
64 static struct cmp *cmp;
68 * Compare 2 attributes. May call the attribute compare function.
70 static int paircompare(REQUEST *req, VALUE_PAIR *request, VALUE_PAIR *check,
71 VALUE_PAIR *check_pairs, VALUE_PAIR **reply_pairs)
80 if (request->attribute != check->attribute)
85 * Check for =* and !* and return appropriately
87 if( check->operator == T_OP_CMP_TRUE )
88 return 0; /* always return 0/EQUAL */
89 if( check->operator == T_OP_CMP_FALSE )
90 return 1; /* always return 1/NOT EQUAL */
93 * See if there is a special compare function.
95 for (c = cmp; c; c = c->next)
96 if (c->attribute == check->attribute)
97 return (c->compare)(c->instance, req, request, check,
98 check_pairs, reply_pairs);
100 switch(check->type) {
103 * Ascend binary attributes can be treated
104 * as opaque objects, I guess...
106 case PW_TYPE_ABINARY:
109 if (request->length != check->length) {
110 ret = 1; /* NOT equal */
113 ret = memcmp(request->strvalue, check->strvalue,
117 ret = strcmp((char *)request->strvalue,
118 (char *)check->strvalue);
120 case PW_TYPE_INTEGER:
122 ret = request->lvalue - check->lvalue;
125 ret = ntohl(request->lvalue) - ntohl(check->lvalue);
136 * See what attribute we want to compare with.
138 static int otherattr(int attr)
142 for (c = cmp; c; c = c->next) {
143 if (c->attribute == attr)
151 * Register a function as compare function.
152 * compare_attr is the attribute in the request we want to
153 * compare with. Normally this is the same as "attr".
154 * You can set this to:
156 * -1 the same as "attr"
157 * 0 always call compare function, not tied to request attribute
158 * >0 Attribute to compare with.
160 * For example, PW_GROUP in a check item needs to be compared
161 * with PW_USER_NAME in the incoming request.
163 int paircompare_register(int attr, int compare_attr, RAD_COMPARE_FUNC fun, void *instance)
167 paircompare_unregister(attr, fun);
169 c = rad_malloc(sizeof(struct cmp));
171 if (compare_attr < 0)
175 c->otherattr = compare_attr;
176 c->instance = instance;
184 * Unregister a function.
186 void paircompare_unregister(int attr, RAD_COMPARE_FUNC fun)
188 struct cmp *c, *last;
191 for (c = cmp; c; c = c->next) {
192 if (c->attribute == attr && c->compare == fun)
197 if (c == NULL) return;
200 last->next = c->next;
208 * Compare two pair lists except for the password information.
209 * For every element in "check" at least one matching copy must
210 * be present in "reply".
214 int paircmp(REQUEST *req, VALUE_PAIR *request, VALUE_PAIR *check, VALUE_PAIR **reply)
216 VALUE_PAIR *check_item;
217 VALUE_PAIR *auth_item;
225 for (check_item = check; check_item != NULL; check_item = check_item->next) {
227 * If the user is setting a configuration value,
228 * then don't bother comparing it to any attributes
229 * sent to us by the user. It ALWAYS matches.
231 if ((check_item->operator == T_OP_SET) ||
232 (check_item->operator == T_OP_ADD)) {
236 switch (check_item->attribute) {
238 * Attributes we skip during comparison.
239 * These are "server" check items.
241 case PW_CRYPT_PASSWORD:
245 case PW_SESSION_TYPE:
246 case PW_STRIP_USER_NAME:
251 * IF the password attribute exists, THEN
252 * we can do comparisons against it. If not,
253 * then the request did NOT contain a
254 * User-Password attribute, so we CANNOT do
255 * comparisons against it.
257 * This hack makes CHAP-Password work..
260 if (pairfind(request, PW_PASSWORD) == NULL) {
267 * See if this item is present in the request.
269 other = otherattr(check_item->attribute);
273 for (; auth_item != NULL; auth_item = auth_item->next) {
274 if (auth_item->attribute == other || other == 0)
279 * Not found, it's not a match.
281 if (auth_item == NULL) {
283 * Didn't find it. If we were *trying*
284 * to not find it, then we succeeded.
286 if (check_item->operator == T_OP_CMP_FALSE)
293 * Else we found it, but we were trying to not
294 * find it, so we failed.
296 if (check_item->operator == T_OP_CMP_FALSE)
301 * We've got to xlat the string before doing
304 if (check_item->flags.do_xlat) {
306 char buffer[sizeof(check_item->strvalue)];
308 check_item->flags.do_xlat = 0;
309 rcode = radius_xlat(buffer, sizeof(buffer),
310 check_item->strvalue,
314 * Parse the string into a new value.
316 pairparsevalue(check_item, buffer);
320 * OK it is present now compare them.
322 compare = paircompare(req, auth_item, check_item, check, reply);
324 switch (check_item->operator) {
327 radlog(L_ERR, "Invalid operator for item %s: "
328 "reverting to '=='", check_item->name);
330 case T_OP_CMP_TRUE: /* compare always == 0 */
331 case T_OP_CMP_FALSE: /* compare always == 1 */
333 if (compare != 0) result = -1;
337 if (compare == 0) result = -1;
341 if (compare >= 0) result = -1;
345 if (compare <= 0) result = -1;
349 if (compare > 0) result = -1;
353 if (compare < 0) result = -1;
358 regcomp(®, (char *)check_item->strvalue, REG_EXTENDED|REG_NOSUB);
359 compare = regexec(®, (char *)auth_item->strvalue,
362 if (compare != 0) result = -1;
366 regcomp(®, (char *)check_item->strvalue, REG_EXTENDED|REG_NOSUB);
367 compare = regexec(®, (char *)auth_item->strvalue,
370 if (compare == 0) result = -1;
374 } /* switch over the operator of the check item */
377 * This attribute didn't match, but maybe there's
378 * another of the same attribute, which DOES match.
381 auth_item = auth_item->next;
386 } /* for every entry in the check item list */
388 return 0; /* it matched */
392 * Compare two attributes simply. Calls paircompare.
395 int simplepaircmp(REQUEST *req, VALUE_PAIR *first, VALUE_PAIR *second)
397 return paircompare( req, first, second, NULL, NULL );
402 * Compare a Connect-Info and a Connect-Rate
404 static int connectcmp(void *instance,
408 VALUE_PAIR *check_pairs,
409 VALUE_PAIR **reply_pairs)
414 check_pairs = check_pairs; /* shut the compiler up */
415 reply_pairs = reply_pairs;
417 rate = atoi((char *)request->strvalue);
418 return rate - check->lvalue;
423 * Compare a portno with a range.
425 static int portcmp(void *instance,
426 REQUEST *req UNUSED, VALUE_PAIR *request, VALUE_PAIR *check,
427 VALUE_PAIR *check_pairs, VALUE_PAIR **reply_pairs)
429 char buf[MAX_STRING_LEN];
432 uint32_t port = request->lvalue;
435 check_pairs = check_pairs; /* shut the compiler up */
436 reply_pairs = reply_pairs;
438 if ((strchr((char *)check->strvalue, ',') == NULL) &&
439 (strchr((char *)check->strvalue, '-') == NULL)) {
440 return (request->lvalue - check->lvalue);
444 strcpy(buf, (char *)check->strvalue);
445 s = strtok(buf, ",");
448 if ((p = strchr(s, '-')) != NULL)
452 lo = strtoul(s, NULL, 10);
453 hi = strtoul(p, NULL, 10);
454 if (lo <= port && port <= hi) {
457 s = strtok(NULL, ",");
464 * Compare prefix/suffix.
467 * - if PW_STRIP_USER_NAME is present in check_pairs,
468 * strip the username of prefix/suffix.
469 * - if PW_STRIP_USER_NAME is not present in check_pairs,
470 * add a PW_STRIPPED_USER_NAME to the request.
472 static int presufcmp(void *instance,
474 VALUE_PAIR *request, VALUE_PAIR *check,
475 VALUE_PAIR *check_pairs, VALUE_PAIR **reply_pairs)
478 char *name = (char *)request->strvalue;
479 char rest[MAX_STRING_LEN];
484 reply_pairs = reply_pairs; /* shut the compiler up */
487 printf("Comparing %s and %s, check->attr is %d\n",
488 name, check->strvalue, check->attribute);
491 len = strlen((char *)check->strvalue);
492 switch (check->attribute) {
494 ret = strncmp(name, (char *)check->strvalue, len);
495 if (ret == 0 && rest)
496 strcpy(rest, name + len);
499 namelen = strlen(name);
502 ret = strcmp(name + namelen - len,
503 (char *)check->strvalue);
504 if (ret == 0 && rest) {
505 strNcpy(rest, name, namelen - len + 1);
512 if (pairfind(check_pairs, PW_STRIP_USER_NAME)) {
514 * I don't think we want to update the User-Name
515 * attribute in place... - atd
517 strcpy((char *)request->strvalue, rest);
518 request->length = strlen(rest);
520 if ((vp = pairfind(check_pairs, PW_STRIPPED_USER_NAME)) != NULL){
521 strcpy((char *)vp->strvalue, rest);
522 vp->length = strlen(rest);
523 } else if ((vp = paircreate(PW_STRIPPED_USER_NAME,
524 PW_TYPE_STRING)) != NULL) {
525 strcpy((char *)vp->strvalue, rest);
526 vp->length = strlen(rest);
527 pairadd(&request, vp);
528 } /* else no memory! Die, die!: FIXME!! */
536 * Compare the current time to a range.
537 * Hmm... it would save work, and probably be better,
538 * if we were passed the REQUEST data structure, so we
539 * could use it's 'timestamp' element. That way, we could
540 * do the comparison against when the packet came in, not now,
541 * and have one less system call to do.
543 static int timecmp(void *instance,
545 VALUE_PAIR *request, VALUE_PAIR *check,
546 VALUE_PAIR *check_pairs, VALUE_PAIR **reply_pairs)
549 request = request; /* shut the compiler up */
550 check_pairs = check_pairs;
551 reply_pairs = reply_pairs;
553 if (timestr_match((char *)check->strvalue, time(NULL)) >= 0) {
560 * Matches if there is NO SUCH ATTRIBUTE as the one named
561 * in check->strvalue. If there IS such an attribute, it
564 * This is ugly, and definitely non-optimal. We should be
565 * doing the lookup only ONCE, and storing the result
566 * in check->lvalue...
568 static int attrcmp(void *instance,
570 VALUE_PAIR *request, VALUE_PAIR *check,
571 VALUE_PAIR *check_pairs, VALUE_PAIR **reply_pairs)
578 check_pairs = check_pairs; /* shut the compiler up */
579 reply_pairs = reply_pairs;
581 if (check->lvalue == 0) {
582 dict = dict_attrbyname((char *)check->strvalue);
588 attr = check->lvalue;
592 * If there's no such attribute, then return MATCH,
595 pair = pairfind(request, attr);
604 * Compare the expiration date.
606 static int expirecmp(void *instance, REQUEST *req UNUSED,
607 VALUE_PAIR *request, VALUE_PAIR *check,
608 VALUE_PAIR *check_pairs, VALUE_PAIR **reply_pairs)
613 request = request; /* shut the compiler up */
614 check_pairs = check_pairs;
615 reply_pairs = reply_pairs;
618 * FIXME! This should be request->timestamp!
622 if (now <= (signed)check->lvalue) {
630 * Compare the request packet type.
632 static int packetcmp(void *instance UNUSED, REQUEST *req,
633 VALUE_PAIR *request UNUSED,
635 VALUE_PAIR *check_pairs UNUSED,
636 VALUE_PAIR **reply_pairs UNUSED)
638 if (req->packet->code == check->lvalue) {
646 * Compare the response packet type.
648 static int responsecmp(void *instance UNUSED,
650 VALUE_PAIR *request UNUSED,
652 VALUE_PAIR *check_pairs UNUSED,
653 VALUE_PAIR **reply_pairs UNUSED)
655 if (req->reply->code == check->lvalue) {
663 * Register server-builtin special attributes.
665 void pair_builtincompare_init(void)
667 paircompare_register(PW_NAS_PORT, -1, portcmp, NULL);
668 paircompare_register(PW_PREFIX, PW_USER_NAME, presufcmp, NULL);
669 paircompare_register(PW_SUFFIX, PW_USER_NAME, presufcmp, NULL);
670 paircompare_register(PW_CONNECT_RATE, PW_CONNECT_INFO, connectcmp, NULL);
671 paircompare_register(PW_CURRENT_TIME, 0, timecmp, NULL);
672 paircompare_register(PW_NO_SUCH_ATTRIBUTE, 0, attrcmp, NULL);
673 paircompare_register(PW_EXPIRATION, 0, expirecmp, NULL);
674 paircompare_register(PW_PACKET_TYPE, 0, packetcmp, NULL);
675 paircompare_register(PW_RESPONSE_PACKET_TYPE, 0, responsecmp, NULL);
679 * Move pairs, replacing/over-writing them, and doing xlat.
682 * Move attributes from one list to the other
683 * if not already present.
685 void pairxlatmove(REQUEST *req, VALUE_PAIR **to, VALUE_PAIR **from)
687 VALUE_PAIR **tailto, *i, *j, *next;
688 VALUE_PAIR *tailfrom = NULL;
692 * Point "tailto" to the end of the "to" list.
695 for(i = *to; i; i = i->next) {
700 * Loop over the "from" list.
702 for(i = *from; i; i = next) {
706 * Don't move 'fallthrough' over.
708 if (i->attribute == PW_FALL_THROUGH) {
713 * We've got to xlat the string before moving
716 if (i->flags.do_xlat) {
718 char buffer[sizeof(i->strvalue)];
720 i->flags.do_xlat = 0;
721 rcode = radius_xlat(buffer, sizeof(buffer),
726 * Parse the string into a new value.
728 pairparsevalue(i, buffer);
731 found = pairfind(*to, i->attribute);
732 switch (i->operator) {
735 * If a similar attribute is found,
738 case T_OP_SUB: /* -= */
740 if (!i->strvalue[0] ||
741 (strcmp((char *)found->strvalue,
742 (char *)i->strvalue) == 0)){
743 pairdelete(to, found->attribute);
746 * 'tailto' may have been
750 for(j = *to; j; j = j->next) {
760 * Add it, if it's not already there.
762 case T_OP_EQ: /* = */
765 continue; /* with the loop */
770 * If a similar attribute is found,
771 * replace it with the new one. Otherwise,
772 * add the new one to the list.
774 case T_OP_SET: /* := */
779 memcpy(found, i, sizeof(*found));
786 * FIXME: Add support for <=, >=, <, >
788 * which will mean (for integers)
789 * 'make the attribute the smaller, etc'
793 * Add the new element to the list, even
794 * if similar ones already exist.
797 case T_OP_ADD: /* += */
802 tailfrom->next = next;
807 * If ALL of the 'to' attributes have been deleted,
808 * then ensure that the 'tail' is updated to point
819 } /* loop over the 'from' list */