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3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
21 * @brief String expansion ("translation"). Implements %Attribute -> value
23 * @copyright 2000,2006 The FreeRADIUS server project
24 * @copyright 2000 Alan DeKok <aland@ox.org>
29 #include <freeradius-devel/radiusd.h>
30 #include <freeradius-devel/parser.h>
31 #include <freeradius-devel/rad_assert.h>
32 #include <freeradius-devel/base64.h>
36 typedef struct xlat_t {
37 char name[MAX_STRING_LEN]; //!< Name of the xlat expansion.
38 int length; //!< Length of name.
39 void *instance; //!< Module instance passed to xlat and escape functions.
40 RAD_XLAT_FUNC func; //!< xlat function.
41 RADIUS_ESCAPE_STRING escape; //!< Escape function to apply to dynamic input to func.
42 bool internal; //!< If true, cannot be redefined.
46 XLAT_LITERAL, //!< Literal string
47 XLAT_PERCENT, //!< Literal string with %v
48 XLAT_MODULE, //!< xlat module
49 XLAT_VIRTUAL, //!< virtual attribute
50 XLAT_ATTRIBUTE, //!< xlat attribute
52 XLAT_REGEX, //!< regex reference
54 XLAT_ALTERNATE //!< xlat conditional syntax :-
58 char const *fmt; //!< The format string.
59 size_t len; //!< Length of the format string.
61 xlat_state_t type; //!< type of this expansion.
62 xlat_exp_t *next; //!< Next in the list.
64 xlat_exp_t *child; //!< Nested expansion.
65 xlat_exp_t *alternate; //!< Alternative expansion if this one expanded to a zero length string.
67 value_pair_tmpl_t attr; //!< An attribute template.
68 xlat_t const *xlat; //!< The xlat expansion to expand format with.
71 typedef struct xlat_out {
72 char const *out; //!< Output data.
73 size_t len; //!< Length of the output string.
76 static rbtree_t *xlat_root = NULL;
79 static char const * const xlat_foreach_names[] = {"Foreach-Variable-0",
92 #if REQUEST_MAX_REGEX > 8
93 # error Please fix the following line
95 static int xlat_inst[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8 }; /* up to 8 for regex */
97 char const *radiusd_short_version = RADIUSD_VERSION_STRING;
99 /** Print length of its RHS.
102 static ssize_t xlat_strlen(UNUSED void *instance, UNUSED REQUEST *request,
103 char const *fmt, char *out, size_t outlen)
105 snprintf(out, outlen, "%u", (unsigned int) strlen(fmt));
109 /** Print the size of the attribute in bytes.
112 static ssize_t xlat_length(UNUSED void *instance, UNUSED REQUEST *request,
113 char const *fmt, char *out, size_t outlen)
116 while (isspace((int) *fmt)) fmt++;
118 if ((radius_get_vp(&vp, request, fmt) < 0) || !vp) {
123 snprintf(out, outlen, "%zu", vp->vp_length);
127 /** Print data as integer, not as VALUE.
130 static ssize_t xlat_integer(UNUSED void *instance, REQUEST *request,
131 char const *fmt, char *out, size_t outlen)
135 uint64_t int64 = 0; /* Needs to be initialised to zero */
136 uint32_t int32 = 0; /* Needs to be initialised to zero */
138 while (isspace((int) *fmt)) fmt++;
140 if ((radius_get_vp(&vp, request, fmt) < 0) || !vp) {
145 switch (vp->da->type) {
148 if (vp->vp_length > 8) {
152 if (vp->vp_length > 4) {
153 memcpy(&int64, vp->vp_octets, vp->vp_length);
154 return snprintf(out, outlen, "%" PRIu64, htonll(int64));
157 memcpy(&int32, vp->vp_octets, vp->vp_length);
158 return snprintf(out, outlen, "%i", htonl(int32));
160 case PW_TYPE_INTEGER64:
161 return snprintf(out, outlen, "%" PRIu64, vp->vp_integer64);
164 * IP addresses are treated specially, as parsing functions assume the value
165 * is bigendian and will convert it for us.
167 case PW_TYPE_IPV4_ADDR:
168 return snprintf(out, outlen, "%u", htonl(vp->vp_ipaddr));
170 case PW_TYPE_IPV4_PREFIX:
171 return snprintf(out, outlen, "%u", htonl((*(uint32_t *)(vp->vp_ipv4prefix + 2))));
173 case PW_TYPE_INTEGER:
175 return snprintf(out, outlen, "%u", vp->vp_integer);
177 return snprintf(out, outlen, "%u", (unsigned int) vp->vp_byte);
179 return snprintf(out, outlen, "%u", (unsigned int) vp->vp_short);
182 * Ethernet is weird... It's network related, so we assume to it should be
185 case PW_TYPE_ETHERNET:
186 memcpy(&int64, &vp->vp_ether, vp->vp_length);
187 return snprintf(out, outlen, "%" PRIu64, htonll(int64));
190 return snprintf(out, outlen, "%i", vp->vp_signed);
192 case PW_TYPE_IPV6_ADDR:
193 return fr_prints_uint128(out, outlen, ntohlll(*(uint128_t const *) &vp->vp_ipv6addr));
195 case PW_TYPE_IPV6_PREFIX:
196 return fr_prints_uint128(out, outlen, ntohlll(*(uint128_t const *) &(vp->vp_ipv6prefix[2])));
202 REDEBUG("Type '%s' of length %zu cannot be converted to integer",
203 fr_int2str(dict_attr_types, vp->da->type, "???"), vp->vp_length);
209 /** Print data as hex, not as VALUE.
212 static ssize_t xlat_hex(UNUSED void *instance, REQUEST *request,
213 char const *fmt, char *out, size_t outlen)
221 uint8_t const *buff = NULL;
223 while (isspace((int) *fmt)) fmt++;
225 if ((radius_get_vp(&vp, request, fmt) < 0) || !vp) {
234 if (vp->da->type == PW_TYPE_OCTETS) {
238 * Cast the value_data_t of the VP to an octets string and
242 ret = value_data_cast(request, &dst, PW_TYPE_OCTETS, NULL, vp->da->type,
243 NULL, &vp->data, vp->vp_length);
245 REDEBUG("%s", fr_strerror());
249 p = buff = dst.octets;
255 * Don't truncate the data.
257 if (outlen < (len * 2)) {
258 rad_const_free(buff);
262 for (i = 0; i < len; i++) {
263 snprintf(out + 2*i, 3, "%02x", p[i]);
265 rad_const_free(buff);
270 /** Return the tag of an attribute reference
273 static ssize_t xlat_tag(UNUSED void *instance, REQUEST *request,
274 char const *fmt, char *out, size_t outlen)
278 while (isspace((int) *fmt)) fmt++;
280 if ((radius_get_vp(&vp, request, fmt) < 0) || !vp) {
285 if (!vp->da->flags.has_tag || !TAG_VALID(vp->tag)) {
290 return snprintf(out, outlen, "%u", vp->tag);
293 /** Print out attribute info
295 * Prints out all instances of a current attribute, or all attributes in a list.
297 * At higher debugging levels, also prints out alternative decodings of the same
298 * value. This is helpful to determine types for unknown attributes of long
299 * passed vendors, or just crazy/broken NAS.
301 * It's also useful for exposing issues in the packet decoding functions, as in
302 * some cases they get fed random garbage data.
304 * This expands to a zero length string.
306 static ssize_t xlat_debug_attr(UNUSED void *instance, REQUEST *request, char const *fmt,
307 char *out, UNUSED size_t outlen)
312 value_pair_tmpl_t vpt;
314 if (!RDEBUG_ENABLED2) {
319 while (isspace((int) *fmt)) fmt++;
321 if (tmpl_from_attr_str(&vpt, fmt, REQUEST_CURRENT, PAIR_LIST_REQUEST, false) <= 0) {
322 RDEBUG("%s", fr_strerror());
326 RIDEBUG("Attributes matching \"%s\"", fmt);
329 for (vp = tmpl_cursor_init(NULL, &cursor, request, &vpt);
331 vp = tmpl_cursor_next(&cursor, &vpt)) {
332 FR_NAME_NUMBER const *type;
335 value = vp_aprints_value(vp, vp, '\'');
336 if (vp->da->flags.has_tag) {
337 RIDEBUG2("&%s:%s:%i %s %s",
338 fr_int2str(pair_lists, vpt.tmpl_list, "<INVALID>"),
341 fr_int2str(fr_tokens, vp->op, "<INVALID>"),
344 RIDEBUG2("&%s:%s %s %s",
345 fr_int2str(pair_lists, vpt.tmpl_list, "<INVALID>"),
347 fr_int2str(fr_tokens, vp->op, "<INVALID>"),
352 if (!RDEBUG_ENABLED3) continue;
354 if (vp->da->vendor) {
357 dv = dict_vendorbyvalue(vp->da->vendor);
358 RIDEBUG2("Vendor : %i (%s)", vp->da->vendor, dv ? dv->name : "unknown");
360 RIDEBUG2("Type : %s", fr_int2str(dict_attr_types, vp->da->type, "<INVALID>"));
361 RIDEBUG2("Length : %zu", vp->vp_length);
363 if (!RDEBUG_ENABLED4) continue;
365 type = dict_attr_types;
369 value_data_t *dst = NULL;
373 if ((PW_TYPE) type->number == vp->da->type) {
377 switch (type->number) {
378 case PW_TYPE_INVALID: /* Not real type */
379 case PW_TYPE_MAX: /* Not real type */
380 case PW_TYPE_EXTENDED: /* Not safe/appropriate */
381 case PW_TYPE_LONG_EXTENDED: /* Not safe/appropriate */
382 case PW_TYPE_TLV: /* Not safe/appropriate */
383 case PW_TYPE_EVS: /* Not safe/appropriate */
384 case PW_TYPE_VSA: /* @fixme We need special behaviour for these */
385 case PW_TYPE_COMBO_IP_ADDR: /* Covered by IPv4 address IPv6 address */
386 case PW_TYPE_COMBO_IP_PREFIX: /* Covered by IPv4 address IPv6 address */
387 case PW_TYPE_TIMEVAL: /* Not a VALUE_PAIR type */
395 dst = talloc_zero(vp, value_data_t);
396 ret = value_data_cast(dst, dst, type->number, NULL, vp->da->type, vp->da,
397 &vp->data, vp->vp_length);
398 if (ret < 0) goto next_type; /* We expect some to fail */
400 value = vp_data_aprints_value(dst, type->number, NULL, dst, (size_t)ret, '\'');
401 if (!value) goto next_type;
403 if ((pad = (11 - strlen(type->name))) < 0) {
408 RDEBUG2("as %s%*s: %s", type->name, pad, " ", value);
421 /** Prints the current module processing the request
424 static ssize_t xlat_module(UNUSED void *instance, REQUEST *request,
425 UNUSED char const *fmt, char *out, size_t outlen)
427 strlcpy(out, request->module, outlen);
433 /** Implements the Foreach-Variable-X
437 static ssize_t xlat_foreach(void *instance, REQUEST *request,
438 UNUSED char const *fmt, char *out, size_t outlen)
444 * See modcall, "FOREACH" for how this works.
446 pvp = (VALUE_PAIR **) request_data_reference(request, radius_get_vp, *(int*) instance);
452 len = vp_prints_value(out, outlen, *pvp, 0);
453 if (is_truncated(len, outlen)) {
454 RDEBUG("Insufficient buffer space to write foreach value");
462 /** Print data as string, if possible.
464 * If attribute "Foo" is defined as "octets" it will normally
465 * be printed as 0x0a0a0a. The xlat "%{string:Foo}" will instead
468 static ssize_t xlat_string(UNUSED void *instance, REQUEST *request,
469 char const *fmt, char *out, size_t outlen)
476 while (isspace((int) *fmt)) fmt++;
484 if ((radius_get_vp(&vp, request, fmt) < 0) || !vp) goto nothing;
486 ret = rad_vp2data(&p, vp);
491 switch (vp->da->type) {
493 len = fr_prints(out, outlen, (char const *) p, vp->vp_length, '"');
497 len = strlcpy(out, vp->vp_strvalue, outlen);
501 len = fr_prints(out, outlen, (char const *) p, ret, '\0');
508 /** xlat expand string attribute value
511 static ssize_t xlat_xlat(UNUSED void *instance, REQUEST *request,
512 char const *fmt, char *out, size_t outlen)
516 while (isspace((int) *fmt)) fmt++;
524 if ((radius_get_vp(&vp, request, fmt) < 0) || !vp) goto nothing;
526 return radius_xlat(out, outlen, request, vp->vp_strvalue, NULL, NULL);
529 /** Dynamically change the debugging level for the current request
533 static ssize_t xlat_debug(UNUSED void *instance, REQUEST *request,
534 char const *fmt, char *out, size_t outlen)
539 * Expand to previous (or current) level
541 snprintf(out, outlen, "%d", request->log.lvl & RAD_REQUEST_OPTION_DEBUG4);
544 * Assume we just want to get the current value and NOT set it to 0
551 request->log.lvl = RAD_REQUEST_OPTION_NONE;
552 request->log.func = NULL;
554 if (level > 4) level = 4;
556 request->log.lvl = level;
557 request->log.func = vradlog_request;
565 * Compare two xlat_t structs, based ONLY on the module name.
567 static int xlat_cmp(void const *one, void const *two)
569 xlat_t const *a = one;
570 xlat_t const *b = two;
572 if (a->length != b->length) {
573 return a->length - b->length;
576 return memcmp(a->name, b->name, a->length);
581 * find the appropriate registered xlat function.
583 static xlat_t *xlat_find(char const *name)
587 strlcpy(my_xlat.name, name, sizeof(my_xlat.name));
588 my_xlat.length = strlen(my_xlat.name);
590 return rbtree_finddata(xlat_root, &my_xlat);
594 /** Register an xlat function.
596 * @param[in] name xlat name.
597 * @param[in] func xlat function to be called.
598 * @param[in] escape function to sanitize any sub expansions passed to the xlat function.
599 * @param[in] instance of module that's registering the xlat function.
600 * @return 0 on success, -1 on failure
602 int xlat_register(char const *name, RAD_XLAT_FUNC func, RADIUS_ESCAPE_STRING escape, void *instance)
608 if (!name || !*name) {
609 DEBUG("xlat_register: Invalid xlat name");
614 * First time around, build up the tree...
616 * FIXME: This code should be hoisted out of this function,
617 * and into a global "initialization". But it isn't critical...
624 xlat_root = rbtree_create(NULL, xlat_cmp, NULL, RBTREE_FLAG_REPLACE);
626 DEBUG("xlat_register: Failed to create tree");
631 for (i = 0; xlat_foreach_names[i] != NULL; i++) {
632 xlat_register(xlat_foreach_names[i],
633 xlat_foreach, NULL, &xlat_inst[i]);
634 c = xlat_find(xlat_foreach_names[i]);
635 rad_assert(c != NULL);
640 #define XLAT_REGISTER(_x) xlat_register(STRINGIFY(_x), xlat_ ## _x, NULL, NULL); \
641 c = xlat_find(STRINGIFY(_x)); \
642 rad_assert(c != NULL); \
645 XLAT_REGISTER(integer);
646 XLAT_REGISTER(strlen);
647 XLAT_REGISTER(length);
650 XLAT_REGISTER(string);
652 XLAT_REGISTER(module);
653 XLAT_REGISTER(debug_attr);
655 xlat_register("debug", xlat_debug, NULL, &xlat_inst[0]);
656 c = xlat_find("debug");
657 rad_assert(c != NULL);
662 * If it already exists, replace the instance.
664 strlcpy(my_xlat.name, name, sizeof(my_xlat.name));
665 my_xlat.length = strlen(my_xlat.name);
666 c = rbtree_finddata(xlat_root, &my_xlat);
669 DEBUG("xlat_register: Cannot re-define internal xlat");
675 c->instance = instance;
680 * Doesn't exist. Create it.
682 c = talloc_zero(xlat_root, xlat_t);
686 strlcpy(c->name, name, sizeof(c->name));
687 c->length = strlen(c->name);
688 c->instance = instance;
690 node = rbtree_insert_node(xlat_root, c);
697 * Ensure that the data is deleted when the node is
700 * @todo: Maybe this should be the other way around...
701 * when a thing IN the tree is deleted, it's automatically
702 * removed from the tree. But for now, this works.
704 (void) talloc_steal(node, c);
708 /** Unregister an xlat function
710 * We can only have one function to call per name, so the passing of "func"
711 * here is extraneous.
713 * @param[in] name xlat to unregister.
714 * @param[in] func unused.
715 * @param[in] instance data.
717 void xlat_unregister(char const *name, UNUSED RAD_XLAT_FUNC func, void *instance)
724 strlcpy(my_xlat.name, name, sizeof(my_xlat.name));
725 my_xlat.length = strlen(my_xlat.name);
727 c = rbtree_finddata(xlat_root, &my_xlat);
730 if (c->instance != instance) return;
732 rbtree_deletebydata(xlat_root, c);
735 static int xlat_unregister_callback(void *instance, void *data)
737 xlat_t *c = (xlat_t *) data;
739 if (c->instance != instance) return 0; /* keep walking */
741 return 2; /* delete it */
744 void xlat_unregister_module(void *instance)
746 rbtree_walk(xlat_root, RBTREE_DELETE_ORDER, xlat_unregister_callback, instance);
750 * Internal redundant handler for xlats
752 typedef enum xlat_redundant_type_t {
756 XLAT_REDUNDANT_LOAD_BALANCE,
757 } xlat_redundant_type_t;
759 typedef struct xlat_redundant_t {
760 xlat_redundant_type_t type;
766 static ssize_t xlat_redundant(void *instance, REQUEST *request,
767 char const *fmt, char *out, size_t outlen)
769 xlat_redundant_t *xr = instance;
774 rad_assert(xr->type == XLAT_REDUNDANT);
777 * Pick the first xlat which succeeds
779 for (ci = cf_item_find_next(xr->cs, NULL);
781 ci = cf_item_find_next(xr->cs, ci)) {
784 if (!cf_item_is_pair(ci)) continue;
786 name = cf_pair_attr(cf_itemtopair(ci));
787 rad_assert(name != NULL);
789 xlat = xlat_find(name);
792 rcode = xlat->func(xlat->instance, request, fmt, out, outlen);
793 if (rcode <= 0) continue;
798 * Everything failed. Oh well.
805 static ssize_t xlat_load_balance(void *instance, REQUEST *request,
806 char const *fmt, char *out, size_t outlen)
809 xlat_redundant_t *xr = instance;
811 CONF_ITEM *found = NULL;
816 * Choose a child at random.
818 for (ci = cf_item_find_next(xr->cs, NULL);
820 ci = cf_item_find_next(xr->cs, ci)) {
821 if (!cf_item_is_pair(ci)) continue;
825 * Replace the previously found one with a random
828 if ((count * (fr_rand() & 0xffff)) < (uint32_t) 0x10000) {
834 * Plain load balancing: do one child, and only one child.
836 if (xr->type == XLAT_LOAD_BALANCE) {
837 name = cf_pair_attr(cf_itemtopair(found));
838 rad_assert(name != NULL);
840 xlat = xlat_find(name);
841 if (!xlat) return -1;
843 return xlat->func(xlat->instance, request, fmt, out, outlen);
846 rad_assert(xr->type == XLAT_REDUNDANT_LOAD_BALANCE);
849 * Try the random one we found. If it fails, keep going
850 * through the rest of the children.
854 name = cf_pair_attr(cf_itemtopair(ci));
855 rad_assert(name != NULL);
857 xlat = xlat_find(name);
861 rcode = xlat->func(xlat->instance, request, fmt, out, outlen);
862 if (rcode > 0) return rcode;
866 * Go to the next one, wrapping around at the end.
868 ci = cf_item_find_next(xr->cs, ci);
869 if (!ci) ci = cf_item_find_next(xr->cs, NULL);
870 } while (ci != found);
876 bool xlat_register_redundant(CONF_SECTION *cs)
878 char const *name1, *name2;
879 xlat_redundant_t *xr;
881 name1 = cf_section_name1(cs);
882 name2 = cf_section_name2(cs);
884 if (!name2) return false;
886 if (xlat_find(name2)) {
887 cf_log_err_cs(cs, "An expansion is already registered for this name");
891 xr = talloc_zero(cs, xlat_redundant_t);
892 if (!xr) return false;
894 if (strcmp(name1, "redundant") == 0) {
895 xr->type = XLAT_REDUNDANT;
897 } else if (strcmp(name1, "redundant-load-balance") == 0) {
898 xr->type = XLAT_REDUNDANT_LOAD_BALANCE;
900 } else if (strcmp(name1, "load-balance") == 0) {
901 xr->type = XLAT_LOAD_BALANCE;
910 * Get the number of children for load balancing.
912 if (xr->type == XLAT_REDUNDANT) {
913 if (xlat_register(name2, xlat_redundant, NULL, xr) < 0) {
921 for (ci = cf_item_find_next(cs, NULL);
923 ci = cf_item_find_next(cs, ci)) {
924 if (!cf_item_is_pair(ci)) continue;
926 if (!xlat_find(cf_pair_attr(cf_itemtopair(ci)))) {
934 if (xlat_register(name2, xlat_load_balance, NULL, xr) < 0) {
944 /** Crappy temporary function to add attribute ref support to xlats
946 * This needs to die, and hopefully will die, when xlat functions accept
947 * xlat node structures.
949 * Provides either a pointer to a buffer which contains the value of the reference VALUE_PAIR
950 * in an architecture independent format. Or a pointer to the start of the fmt string.
952 * The pointer is only guaranteed to be valid between calls to xlat_fmt_to_ref,
953 * and so long as the source VALUE_PAIR is not freed.
955 * @param out where to write a pointer to the buffer to the data the xlat function needs to work on.
956 * @param request current request.
958 * @returns the length of the data or -1 on error.
960 ssize_t xlat_fmt_to_ref(uint8_t const **out, REQUEST *request, char const *fmt)
964 while (isspace((int) *fmt)) fmt++;
967 if ((radius_get_vp(&vp, request, fmt) < 0) || !vp) {
972 return rad_vp2data(out, vp);
975 *out = (uint8_t const *)fmt;
979 /** De-register all xlat functions, used mainly for debugging.
984 rbtree_free(xlat_root);
988 # define XLAT_DEBUG DEBUG3
990 # define XLAT_DEBUG(...)
993 static ssize_t xlat_tokenize_expansion(TALLOC_CTX *ctx, char *fmt, xlat_exp_t **head,
995 static ssize_t xlat_tokenize_literal(TALLOC_CTX *ctx, char *fmt, xlat_exp_t **head,
996 bool brace, char const **error);
997 static size_t xlat_process(char **out, REQUEST *request, xlat_exp_t const * const head,
998 RADIUS_ESCAPE_STRING escape, void *escape_ctx);
1000 static ssize_t xlat_tokenize_alternation(TALLOC_CTX *ctx, char *fmt, xlat_exp_t **head,
1007 rad_assert(fmt[0] == '%');
1008 rad_assert(fmt[1] == '{');
1009 rad_assert(fmt[2] == '%');
1010 rad_assert(fmt[3] == '{');
1012 XLAT_DEBUG("ALTERNATE <-- %s", fmt);
1014 node = talloc_zero(ctx, xlat_exp_t);
1015 node->type = XLAT_ALTERNATE;
1018 slen = xlat_tokenize_expansion(node, p, &node->child, error);
1021 return slen - (p - fmt);
1027 *error = "Expected ':' after first expansion";
1034 *error = "Expected '-' after ':'";
1040 * Allow the RHS to be empty as a special case.
1044 * Hack up an empty string.
1046 node->alternate = talloc_zero(node, xlat_exp_t);
1047 node->alternate->type = XLAT_LITERAL;
1048 node->alternate->fmt = talloc_typed_strdup(node->alternate, "");
1052 slen = xlat_tokenize_literal(node, p, &node->alternate, true, error);
1055 return slen - (p - fmt);
1058 if (!node->alternate) {
1060 *error = "Empty expansion is invalid";
1070 static ssize_t xlat_tokenize_expansion(TALLOC_CTX *ctx, char *fmt, xlat_exp_t **head,
1077 rad_assert(fmt[0] == '%');
1078 rad_assert(fmt[1] == '{');
1083 if ((fmt[2] == '%') && (fmt[3] == '{')) return xlat_tokenize_alternation(ctx, fmt, head, error);
1085 XLAT_DEBUG("EXPANSION <-- %s", fmt);
1086 node = talloc_zero(ctx, xlat_exp_t);
1087 node->fmt = fmt + 2;
1092 * Handle regex's specially.
1094 if (isdigit((int) fmt[2]) && (fmt[3] == '}')) {
1095 if (fmt[2] == '9') {
1097 *error = "Invalid regex reference";
1101 XLAT_DEBUG("REGEX <-- %s", fmt);
1103 node->attr.tmpl_num = fmt[2] - '0'; /* ASCII */
1105 node->type = XLAT_REGEX;
1109 #endif /* HAVE_REGEX */
1114 * %{Tunnel-Password:1}
1115 * %{Tunnel-Password:1[#]}
1116 * %{request:Attr-Name}
1117 * %{request:Tunnel-Password:1}
1118 * %{request:Tunnel-Password:1[#]}
1123 * This is for efficiency, so we don't search for an xlat,
1124 * when what's being referenced is obviously an attribute.
1127 for (q = p; *q != '\0'; q++) {
1128 if (*q == ':') break;
1130 if (isspace((int) *q)) break;
1132 if (*q == '[') continue;
1134 if (*q == '}') break;
1138 * Check for empty expressions %{}
1140 if ((*q == '}') && (q == p)) {
1141 *error = "Empty expression is invalid";
1146 * Might be a module name reference.
1148 * If it's not, it's an attribute or parse error.
1152 node->xlat = xlat_find(node->fmt);
1157 node->type = XLAT_MODULE;
1160 XLAT_DEBUG("MOD <-- %s ... %s", node->fmt, p);
1162 slen = xlat_tokenize_literal(node, p, &node->child, true, error);
1165 return slen - (p - fmt);
1170 rad_assert(node->next == NULL);
1174 *q = ':'; /* Avoids a strdup */
1178 * The first token ends with:
1179 * - '[' - Which is an attribute index, so it must be an attribute.
1180 * - '}' - The end of the expansion, which means it was a bareword.
1182 slen = tmpl_from_attr_substr(&node->attr, p, REQUEST_CURRENT, PAIR_LIST_REQUEST, true);
1185 * If the parse error occurred before the ':'
1186 * then the error is changed to 'Unknown module',
1187 * as it was more likely to be a bad module name,
1188 * than a request qualifier.
1190 if ((*q == ':') && ((p + (slen * -1)) < q)) {
1191 *error = "Unknown module";
1193 *error = fr_strerror();
1195 return slen - (p - fmt);
1199 * Might be a virtual XLAT attribute
1201 if (node->attr.type == TMPL_TYPE_ATTR_UNDEFINED) {
1202 node->xlat = xlat_find(node->attr.tmpl_unknown_name);
1204 node->type = XLAT_VIRTUAL;
1205 node->fmt = node->attr.tmpl_unknown_name;
1207 XLAT_DEBUG("VIRTUAL <-- %s", node->fmt);
1209 rad_assert(node->next == NULL);
1215 *error = "Unknown attribute";
1219 node->type = XLAT_ATTRIBUTE;
1224 *error = "No matching closing brace";
1225 return -1; /* second character of format string */
1229 rad_assert(node->next == NULL);
1235 static ssize_t xlat_tokenize_literal(TALLOC_CTX *ctx, char *fmt, xlat_exp_t **head,
1236 bool brace, char const **error)
1241 if (!*fmt) return 0;
1243 XLAT_DEBUG("LITERAL <-- %s", fmt);
1245 node = talloc_zero(ctx, xlat_exp_t);
1248 node->type = XLAT_LITERAL;
1256 *error = "Invalid escape at end of string";
1264 * Process the expansion.
1266 if ((p[0] == '%') && (p[1] == '{')) {
1269 XLAT_DEBUG("EXPANSION-2 <-- %s", node->fmt);
1271 slen = xlat_tokenize_expansion(node, p, &node->next, error);
1274 return slen - (p - fmt);
1276 *p = '\0'; /* end the literal */
1279 rad_assert(node->next != NULL);
1282 * Short-circuit the recursive call.
1283 * This saves another function call and
1284 * memory allocation.
1289 * "foo %{User-Name} bar"
1291 * EXPANSION User-Name
1294 slen = xlat_tokenize_literal(node->next, p, &(node->next->next), brace, error);
1295 rad_assert(slen != 0);
1298 return slen - (p - fmt);
1301 brace = false; /* it was found above, or else the above code errored out */
1303 break; /* stop processing the string */
1307 * Check for valid single-character expansions.
1313 if (!p[1] || !strchr("%dlmntDGHISTYv", p[1])) {
1315 *error = "Invalid variable expansion";
1320 next = talloc_zero(node, xlat_exp_t);
1324 next->fmt = talloc_typed_strdup(next, "%");
1326 XLAT_DEBUG("LITERAL-PERCENT <-- %s", next->fmt);
1327 next->type = XLAT_LITERAL;
1332 XLAT_DEBUG("PERCENT <-- %c", *next->fmt);
1333 next->type = XLAT_PERCENT;
1345 slen = xlat_tokenize_literal(node->next, p, &(node->next->next), brace, error);
1346 rad_assert(slen != 0);
1349 return slen - (p - fmt);
1352 brace = false; /* it was found above, or else the above code errored out */
1354 break; /* stop processing the string */
1358 * If required, eat the brace.
1360 if (brace && (*p == '}')) {
1372 * We were told to look for a brace, but we ran off of
1373 * the end of the string before we found one.
1376 *error = "Missing closing brace at end of string";
1381 * Squash zero-width literals
1383 if (node->len > 0) {
1387 (void) talloc_steal(ctx, node->next);
1396 static char const xlat_tabs[] = " ";
1398 static void xlat_tokenize_debug(xlat_exp_t const *node, int lvl)
1400 rad_assert(node != NULL);
1402 if (lvl >= (int) sizeof(xlat_tabs)) lvl = sizeof(xlat_tabs);
1405 switch (node->type) {
1407 DEBUG("%.*sliteral --> %s", lvl, xlat_tabs, node->fmt);
1411 DEBUG("%.*spercent --> %c", lvl, xlat_tabs, node->fmt[0]);
1414 case XLAT_ATTRIBUTE:
1415 rad_assert(node->attr.tmpl_da != NULL);
1416 DEBUG("%.*sattribute --> %s", lvl, xlat_tabs, node->attr.tmpl_da->name);
1417 rad_assert(node->child == NULL);
1418 if ((node->attr.tmpl_tag != TAG_ANY) || (node->attr.tmpl_num != NUM_ANY)) {
1419 DEBUG("%.*s{", lvl, xlat_tabs);
1421 DEBUG("%.*sref %d", lvl + 1, xlat_tabs, node->attr.tmpl_request);
1422 DEBUG("%.*slist %d", lvl + 1, xlat_tabs, node->attr.tmpl_list);
1424 if (node->attr.tmpl_tag != TAG_ANY) {
1425 DEBUG("%.*stag %d", lvl + 1, xlat_tabs, node->attr.tmpl_tag);
1427 if (node->attr.tmpl_num != NUM_ANY) {
1428 if (node->attr.tmpl_num == NUM_COUNT) {
1429 DEBUG("%.*s[#]", lvl + 1, xlat_tabs);
1430 } else if (node->attr.tmpl_num == NUM_ALL) {
1431 DEBUG("%.*s[*]", lvl + 1, xlat_tabs);
1433 DEBUG("%.*s[%d]", lvl + 1, xlat_tabs, node->attr.tmpl_num);
1437 DEBUG("%.*s}", lvl, xlat_tabs);
1442 rad_assert(node->fmt != NULL);
1443 DEBUG("%.*svirtual --> %s", lvl, xlat_tabs, node->fmt);
1447 rad_assert(node->xlat != NULL);
1448 DEBUG("%.*sxlat --> %s", lvl, xlat_tabs, node->xlat->name);
1450 DEBUG("%.*s{", lvl, xlat_tabs);
1451 xlat_tokenize_debug(node->child, lvl + 1);
1452 DEBUG("%.*s}", lvl, xlat_tabs);
1458 DEBUG("%.*sregex-var --> %d", lvl, xlat_tabs, node->attr.tmpl_num);
1462 case XLAT_ALTERNATE:
1463 DEBUG("%.*sif {", lvl, xlat_tabs);
1464 xlat_tokenize_debug(node->child, lvl + 1);
1465 DEBUG("%.*s}", lvl, xlat_tabs);
1466 DEBUG("%.*selse {", lvl, xlat_tabs);
1467 xlat_tokenize_debug(node->alternate, lvl + 1);
1468 DEBUG("%.*s}", lvl, xlat_tabs);
1475 size_t xlat_sprint(char *buffer, size_t bufsize, xlat_exp_t const *node)
1486 end = buffer + bufsize;
1489 switch (node->type) {
1491 strlcpy(p, node->fmt, end - p);
1497 p[1] = node->fmt[0];
1501 case XLAT_ATTRIBUTE:
1505 if (node->attr.tmpl_request != REQUEST_CURRENT) {
1506 strlcpy(p, fr_int2str(request_refs, node->attr.tmpl_request, "??"), end - p);
1511 if ((node->attr.tmpl_request != REQUEST_CURRENT) ||
1512 (node->attr.tmpl_list != PAIR_LIST_REQUEST)) {
1513 strlcpy(p, fr_int2str(pair_lists, node->attr.tmpl_list, "??"), end - p);
1518 strlcpy(p, node->attr.tmpl_da->name, end - p);
1521 if (node->attr.tmpl_tag != TAG_ANY) {
1523 snprintf(p, end - p, "%u", node->attr.tmpl_tag);
1527 if (node->attr.tmpl_num != NUM_ANY) {
1529 switch (node->attr.tmpl_num) {
1539 snprintf(p, end - p, "%i", node->attr.tmpl_num);
1548 snprintf(p, end - p, "%%{%i}", node->attr.tmpl_num);
1555 strlcpy(p, node->fmt, end - p);
1563 strlcpy(p, node->xlat->name, end - p);
1566 rad_assert(node->child != NULL);
1567 len = xlat_sprint(p, end - p, node->child);
1572 case XLAT_ALTERNATE:
1576 len = xlat_sprint(p, end - p, node->child);
1582 len = xlat_sprint(p, end - p, node->alternate);
1590 if (p == end) break;
1600 ssize_t xlat_tokenize(TALLOC_CTX *ctx, char *fmt, xlat_exp_t **head,
1603 return xlat_tokenize_literal(ctx, fmt, head, false, error);
1607 /** Tokenize an xlat expansion
1609 * @param[in] request the input request. Memory will be attached here.
1610 * @param[in] fmt the format string to expand
1611 * @param[out] head the head of the xlat list / tree structure.
1613 static ssize_t xlat_tokenize_request(REQUEST *request, char const *fmt, xlat_exp_t **head)
1617 char const *error = NULL;
1622 * Copy the original format string to a buffer so that
1623 * the later functions can mangle it in-place, which is
1626 tokens = talloc_typed_strdup(request, fmt);
1627 if (!tokens) return -1;
1629 slen = xlat_tokenize_literal(request, tokens, head, false, &error);
1632 * Zero length expansion, return a zero length node.
1635 *head = talloc_zero(request, xlat_exp_t);
1639 * Output something like:
1642 * " ^ error was here"
1645 talloc_free(tokens);
1646 rad_assert(error != NULL);
1648 REMARKER(fmt, -slen, error);
1652 if (*head && (debug_flag > 2)) {
1654 DEBUG("Parsed xlat tree:");
1655 xlat_tokenize_debug(*head, 0);
1659 * All of the nodes point to offsets in the "tokens"
1660 * string. Let's ensure that free'ing head will free
1663 (void) talloc_steal(*head, tokens);
1669 static char *xlat_getvp(TALLOC_CTX *ctx, REQUEST *request, value_pair_tmpl_t const *vpt,
1670 bool escape, bool return_null)
1672 VALUE_PAIR *vp = NULL, *virtual = NULL;
1673 RADIUS_PACKET *packet = NULL;
1678 char quote = escape ? '"' : '\0';
1683 * See if we're dealing with an attribute in the request
1685 * This allows users to manipulate virtual attributes as if
1686 * they were real ones.
1688 vp = tmpl_cursor_init(&err, &cursor, request, vpt);
1689 if (vp) goto do_print;
1692 * We didn't find the VP in a list.
1693 * If it's not a virtual one, and we're not meant to
1694 * be counting it, return.
1696 if (!vpt->tmpl_da->flags.virtual) {
1697 if (vpt->tmpl_num == NUM_COUNT) goto do_print;
1702 * Switch out the request to the one specified by the template
1704 if (radius_request(&request, vpt->tmpl_request) < 0) return NULL;
1707 * Some non-packet expansions
1709 switch (vpt->tmpl_da->attr) {
1711 break; /* ignore them */
1713 case PW_CLIENT_SHORTNAME:
1714 if (vpt->tmpl_num == NUM_COUNT) goto count_virtual;
1715 if (request->client && request->client->shortname) {
1716 return talloc_typed_strdup(ctx, request->client->shortname);
1718 return talloc_typed_strdup(ctx, "<UNKNOWN-CLIENT>");
1720 case PW_REQUEST_PROCESSING_STAGE:
1721 if (vpt->tmpl_num == NUM_COUNT) goto count_virtual;
1722 if (request->component) {
1723 return talloc_typed_strdup(ctx, request->component);
1725 return talloc_typed_strdup(ctx, "server_core");
1727 case PW_VIRTUAL_SERVER:
1728 if (vpt->tmpl_num == NUM_COUNT) goto count_virtual;
1729 if (!request->server) return NULL;
1730 return talloc_typed_strdup(ctx, request->server);
1732 case PW_MODULE_RETURN_CODE:
1733 if (vpt->tmpl_num == NUM_COUNT) goto count_virtual;
1734 if (!request->rcode) return NULL;
1735 return talloc_typed_strdup(ctx, fr_int2str(modreturn_table, request->rcode, ""));
1739 * All of the attributes must now refer to a packet.
1740 * If there's no packet, we can't print any attribute
1743 packet = radius_packet(request, vpt->tmpl_list);
1745 if (return_null) return NULL;
1746 return vp_aprints_type(ctx, vpt->tmpl_da->type);
1750 switch (vpt->tmpl_da->attr) {
1754 case PW_PACKET_TYPE:
1755 dv = dict_valbyattr(PW_PACKET_TYPE, 0, packet->code);
1756 if (dv) return talloc_typed_strdup(ctx, dv->name);
1757 return talloc_typed_asprintf(ctx, "%d", packet->code);
1759 case PW_RESPONSE_PACKET_TYPE:
1764 if (request->proxy_reply && (!request->reply || !request->reply->code)) {
1765 code = request->proxy_reply->code;
1768 if (request->reply) {
1769 code = request->reply->code;
1772 return talloc_typed_strdup(ctx, fr_packet_codes[code]);
1776 * Virtual attributes which require a temporary VALUE_PAIR
1777 * to be allocated. We can't use stack allocated memory
1778 * because of the talloc checks sprinkled throughout the
1779 * various VP functions.
1781 case PW_PACKET_AUTHENTICATION_VECTOR:
1782 virtual = pairalloc(ctx, vpt->tmpl_da);
1783 pairmemcpy(virtual, packet->vector, sizeof(packet->vector));
1787 case PW_CLIENT_IP_ADDRESS:
1788 case PW_PACKET_SRC_IP_ADDRESS:
1789 if (packet->src_ipaddr.af == AF_INET) {
1790 virtual = pairalloc(ctx, vpt->tmpl_da);
1791 virtual->vp_ipaddr = packet->src_ipaddr.ipaddr.ip4addr.s_addr;
1796 case PW_PACKET_DST_IP_ADDRESS:
1797 if (packet->dst_ipaddr.af == AF_INET) {
1798 virtual = pairalloc(ctx, vpt->tmpl_da);
1799 virtual->vp_ipaddr = packet->dst_ipaddr.ipaddr.ip4addr.s_addr;
1804 case PW_PACKET_SRC_IPV6_ADDRESS:
1805 if (packet->src_ipaddr.af == AF_INET6) {
1806 virtual = pairalloc(ctx, vpt->tmpl_da);
1807 memcpy(&virtual->vp_ipv6addr,
1808 &packet->src_ipaddr.ipaddr.ip6addr,
1809 sizeof(packet->src_ipaddr.ipaddr.ip6addr));
1814 case PW_PACKET_DST_IPV6_ADDRESS:
1815 if (packet->dst_ipaddr.af == AF_INET6) {
1816 virtual = pairalloc(ctx, vpt->tmpl_da);
1817 memcpy(&virtual->vp_ipv6addr,
1818 &packet->dst_ipaddr.ipaddr.ip6addr,
1819 sizeof(packet->dst_ipaddr.ipaddr.ip6addr));
1824 case PW_PACKET_SRC_PORT:
1825 virtual = pairalloc(ctx, vpt->tmpl_da);
1826 virtual->vp_integer = packet->src_port;
1830 case PW_PACKET_DST_PORT:
1831 virtual = pairalloc(ctx, vpt->tmpl_da);
1832 virtual->vp_integer = packet->dst_port;
1838 * Fake various operations for virtual attributes.
1841 if (vpt->tmpl_num != NUM_ANY) switch (vpt->tmpl_num) {
1843 * [n] is NULL (we only have [0])
1848 * [*] means only one.
1854 * [#] means 1 (as there's only one)
1858 ret = talloc_strdup(ctx, "1");
1862 * [0] is fine (get the first instance)
1871 switch (vpt->tmpl_num) {
1873 * Return a count of the VPs.
1879 fr_cursor_first(&cursor);
1880 while (fr_cursor_next_by_da(&cursor, vpt->tmpl_da, vpt->tmpl_tag)) count++;
1882 return talloc_typed_asprintf(ctx, "%d", count);
1887 * Concatenate all values together,
1888 * separated by commas.
1894 if (!fr_cursor_current(&cursor)) return NULL;
1895 p = vp_aprints_value(ctx, vp, quote);
1896 if (!p) return NULL;
1898 while ((vp = tmpl_cursor_next(&cursor, vpt)) != NULL) {
1899 q = vp_aprints_value(ctx, vp, quote);
1900 if (!q) return NULL;
1901 p = talloc_strdup_append(p, ",");
1902 p = talloc_strdup_append(p, q);
1910 * The cursor was set to the correct
1911 * position above by tmpl_cursor_init.
1913 vp = fr_cursor_current(&cursor);
1918 if (return_null) return NULL;
1919 return vp_aprints_type(ctx, vpt->tmpl_da->type);
1923 ret = vp_aprints_value(ctx, vp, quote);
1926 talloc_free(virtual);
1931 static const char xlat_spaces[] = " ";
1934 static char *xlat_aprint(TALLOC_CTX *ctx, REQUEST *request, xlat_exp_t const * const node,
1935 RADIUS_ESCAPE_STRING escape, void *escape_ctx, int lvl)
1938 char *str = NULL, *child;
1941 XLAT_DEBUG("%.*sxlat aprint %d", lvl, xlat_spaces, node->type);
1943 switch (node->type) {
1945 * Don't escape this.
1948 XLAT_DEBUG("xlat_aprint LITERAL");
1949 return talloc_typed_strdup(ctx, node->fmt);
1952 * Do a one-character expansion.
1957 size_t freespace = 256;
1961 XLAT_DEBUG("xlat_aprint PERCENT");
1963 str = talloc_array(ctx, char, freespace); /* @todo do better allocation */
1966 when = request->timestamp;
1967 if (request->packet) {
1968 when = request->packet->timestamp.tv_sec;
1977 case 'd': /* request day */
1978 if (!localtime_r(&when, &ts)) goto error;
1979 strftime(str, freespace, "%d", &ts);
1982 case 'l': /* request timestamp */
1983 snprintf(str, freespace, "%lu",
1984 (unsigned long) when);
1987 case 'm': /* request month */
1988 if (!localtime_r(&when, &ts)) goto error;
1989 strftime(str, freespace, "%m", &ts);
1992 case 'n': /* Request Number*/
1993 snprintf(str, freespace, "%u", request->number);
1996 case 't': /* request timestamp */
1997 CTIME_R(&when, str, freespace);
1998 nl = strchr(str, '\n');
2002 case 'D': /* request date */
2003 if (!localtime_r(&when, &ts)) goto error;
2004 strftime(str, freespace, "%Y%m%d", &ts);
2007 case 'G': /* request minute */
2008 if (!localtime_r(&when, &ts)) goto error;
2009 strftime(str, freespace, "%M", &ts);
2012 case 'H': /* request hour */
2013 if (!localtime_r(&when, &ts)) goto error;
2014 strftime(str, freespace, "%H", &ts);
2017 case 'I': /* Request ID */
2018 if (request->packet) {
2019 snprintf(str, freespace, "%i", request->packet->id);
2023 case 'S': /* request timestamp in SQL format*/
2024 if (!localtime_r(&when, &ts)) goto error;
2025 strftime(str, freespace, "%Y-%m-%d %H:%M:%S", &ts);
2028 case 'T': /* request timestamp */
2029 if (!localtime_r(&when, &ts)) goto error;
2030 strftime(str, freespace, "%Y-%m-%d-%H.%M.%S.000000", &ts);
2033 case 'Y': /* request year */
2034 if (!localtime_r(&when, &ts)) {
2036 REDEBUG("Failed converting packet timestamp to localtime: %s", fr_syserror(errno));
2040 strftime(str, freespace, "%Y", &ts);
2043 case 'v': /* Version of code */
2044 snprintf(str, freespace, "%s", radiusd_short_version);
2054 case XLAT_ATTRIBUTE:
2055 XLAT_DEBUG("xlat_aprint ATTRIBUTE");
2058 * Some attributes are virtual <sigh>
2060 str = xlat_getvp(ctx, request, &node->attr, escape ? false : true, true);
2062 XLAT_DEBUG("EXPAND attr %s", node->attr.tmpl_da->name);
2063 XLAT_DEBUG(" ---> %s", str);
2068 XLAT_DEBUG("xlat_aprint VIRTUAL");
2069 str = talloc_array(ctx, char, 2048); /* FIXME: have the module call talloc_typed_asprintf */
2070 rcode = node->xlat->func(node->xlat->instance, request, NULL, str, 2048);
2078 XLAT_DEBUG("xlat_aprint MODULE");
2079 if (xlat_process(&child, request, node->child, node->xlat->escape, node->xlat->instance) == 0) {
2083 XLAT_DEBUG("%.*sEXPAND mod %s %s", lvl, xlat_spaces, node->fmt, node->child->fmt);
2084 XLAT_DEBUG("%.*s ---> %s", lvl, xlat_spaces, child);
2089 * The OUTPUT of xlat is a printable string. The INPUT might not be...
2091 * This is really the reverse of fr_prints().
2093 if (cf_new_escape && *child) {
2098 type = PW_TYPE_STRING;
2099 slen = value_data_from_str(request, &data, &type, NULL, child, talloc_array_length(child) - 1, '"');
2100 rad_assert(slen > 0);
2110 if (*p == '\\') switch (p[1]) {
2132 str = talloc_array(ctx, char, 2048); /* FIXME: have the module call talloc_typed_asprintf */
2133 *str = '\0'; /* Be sure the string is NULL terminated, we now only free on error */
2135 rcode = node->xlat->func(node->xlat->instance, request, child, str, 2048);
2145 XLAT_DEBUG("xlat_aprint REGEX");
2146 child = request_data_reference(request, request,
2147 REQUEST_DATA_REGEX | node->attr.tmpl_num);
2148 if (!child) return NULL;
2150 str = talloc_typed_strdup(ctx, child);
2154 case XLAT_ALTERNATE:
2155 XLAT_DEBUG("xlat_aprint ALTERNATE");
2156 rad_assert(node->child != NULL);
2157 rad_assert(node->alternate != NULL);
2159 str = xlat_aprint(ctx, request, node->child, escape, escape_ctx, lvl);
2162 str = xlat_aprint(ctx, request, node->alternate, escape, escape_ctx, lvl);
2168 * Escape the non-literals we found above.
2170 if (str && escape) {
2173 escaped = talloc_array(ctx, char, 2048); /* FIXME: do something intelligent */
2174 escape(request, escaped, 2038, str, escape_ctx);
2183 static size_t xlat_process(char **out, REQUEST *request, xlat_exp_t const * const head,
2184 RADIUS_ESCAPE_STRING escape, void *escape_ctx)
2188 char **array, *answer;
2189 xlat_exp_t const *node;
2194 * There are no nodes to process, so the result is a zero
2198 *out = talloc_zero_array(request, char, 1);
2203 * Hack for speed. If it's one expansion, just allocate
2204 * that and return, instead of allocating an intermediary
2209 * Pass the MAIN escape function. Recursive
2210 * calls will call node-specific escape
2213 answer = xlat_aprint(request, request, head, escape, escape_ctx, 0);
2215 *out = talloc_zero_array(request, char, 1);
2219 return strlen(answer);
2222 list = 0; /* FIXME: calculate this once */
2223 for (node = head; node != NULL; node = node->next) {
2227 array = talloc_array(request, char *, list);
2228 if (!array) return -1;
2230 for (node = head, i = 0; node != NULL; node = node->next, i++) {
2231 array[i] = xlat_aprint(array, request, node, escape, escape_ctx, 0); /* may be NULL */
2235 for (i = 0; i < list; i++) {
2236 if (array[i]) total += strlen(array[i]); /* FIXME: calculate strlen once */
2241 *out = talloc_zero_array(request, char, 1);
2245 answer = talloc_array(request, char, total + 1);
2248 for (i = 0; i < list; i++) {
2252 len = strlen(array[i]);
2253 memcpy(answer + total, array[i], len);
2257 answer[total] = '\0';
2258 talloc_free(array); /* and child entries */
2265 /** Replace %whatever in a string.
2267 * See 'doc/variables.txt' for more information.
2269 * @param[out] out Where to write pointer to output buffer.
2270 * @param[in] outlen Size of out.
2271 * @param[in] request current request.
2272 * @param[in] node the xlat structure to expand
2273 * @param[in] escape function to escape final value e.g. SQL quoting.
2274 * @param[in] escape_ctx pointer to pass to escape function.
2275 * @return length of string written @bug should really have -1 for failure
2277 static ssize_t xlat_expand_struct(char **out, size_t outlen, REQUEST *request, xlat_exp_t const *node,
2278 RADIUS_ESCAPE_STRING escape, void *escape_ctx)
2283 rad_assert(node != NULL);
2285 len = xlat_process(&buff, request, node, escape, escape_ctx);
2286 if ((len < 0) || !buff) {
2287 rad_assert(buff == NULL);
2288 if (*out) *out[0] = '\0';
2295 strlcpy(*out, buff, outlen);
2299 return strlen(*out);
2302 static ssize_t xlat_expand(char **out, size_t outlen, REQUEST *request, char const *fmt,
2303 RADIUS_ESCAPE_STRING escape, void *escape_ctx) CC_HINT(nonnull (1, 3, 4));
2305 /** Replace %whatever in a string.
2307 * See 'doc/variables.txt' for more information.
2309 * @param[out] out Where to write pointer to output buffer.
2310 * @param[in] outlen Size of out.
2311 * @param[in] request current request.
2312 * @param[in] fmt string to expand.
2313 * @param[in] escape function to escape final value e.g. SQL quoting.
2314 * @param[in] escape_ctx pointer to pass to escape function.
2315 * @return length of string written @bug should really have -1 for failure
2317 static ssize_t xlat_expand(char **out, size_t outlen, REQUEST *request, char const *fmt,
2318 RADIUS_ESCAPE_STRING escape, void *escape_ctx)
2324 * Give better errors than the old code.
2326 len = xlat_tokenize_request(request, fmt, &node);
2331 *out = talloc_zero_array(request, char, 1);
2337 if (*out) *out[0] = '\0';
2341 len = xlat_expand_struct(out, outlen, request, node, escape, escape_ctx);
2344 RDEBUG2("EXPAND %s", fmt);
2345 RDEBUG2(" --> %s", *out);
2350 /** Try to convert an xlat to a tmpl for efficiency
2352 * @param ctx to allocate new value_pair_tmpl_t in.
2353 * @param node to convert.
2354 * @return NULL if unable to convert (not necessarily error), or a new value_pair_tmpl_t.
2356 value_pair_tmpl_t *xlat_to_tmpl_attr(TALLOC_CTX *ctx, xlat_exp_t *node)
2358 value_pair_tmpl_t *vpt;
2360 if (node->next || (node->type != XLAT_ATTRIBUTE)) return NULL;
2363 * Concat means something completely different as an attribute reference
2364 * Count isn't implemented.
2366 if ((node->attr.tmpl_num == NUM_COUNT) || (node->attr.tmpl_num == NUM_ALL)) return NULL;
2368 vpt = tmpl_alloc(ctx, TMPL_TYPE_ATTR, node->fmt, -1);
2369 if (!vpt) return NULL;
2370 memcpy(&vpt->data, &node->attr.data, sizeof(vpt->data));
2377 /** Try to convert attr tmpl to an xlat for &attr[*] and artificially constructing expansions
2379 * @param ctx to allocate new xlat_expt_t in.
2380 * @param vpt to convert.
2381 * @return NULL if unable to convert (not necessarily error), or a new value_pair_tmpl_t.
2383 xlat_exp_t *xlat_from_tmpl_attr(TALLOC_CTX *ctx, value_pair_tmpl_t *vpt)
2387 if (vpt->type != TMPL_TYPE_ATTR) return NULL;
2389 node = talloc_zero(ctx, xlat_exp_t);
2390 node->fmt = talloc_memdup(node, vpt->name, vpt->len);
2391 tmpl_init(&node->attr, TMPL_TYPE_ATTR, node->fmt, talloc_array_length(node->fmt) - 1);
2392 memcpy(&node->attr.data, &vpt->data, sizeof(vpt->data));
2397 ssize_t radius_xlat(char *out, size_t outlen, REQUEST *request, char const *fmt, RADIUS_ESCAPE_STRING escape, void *ctx)
2399 return xlat_expand(&out, outlen, request, fmt, escape, ctx);
2402 ssize_t radius_axlat(char **out, REQUEST *request, char const *fmt, RADIUS_ESCAPE_STRING escape, void *ctx)
2404 return xlat_expand(out, 0, request, fmt, escape, ctx);
2407 ssize_t radius_axlat_struct(char **out, REQUEST *request, xlat_exp_t const *xlat, RADIUS_ESCAPE_STRING escape, void *ctx)
2409 return xlat_expand_struct(out, 0, request, xlat, escape, ctx);