2 * This program is free software; you can redistribute it and/or modify
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",
93 static int xlat_inst[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }; /* up to 10 for foreach */
95 char const *radiusd_short_version = RADIUSD_VERSION_STRING;
97 /** Print length of its RHS.
100 static ssize_t xlat_strlen(UNUSED void *instance, UNUSED REQUEST *request,
101 char const *fmt, char *out, size_t outlen)
103 snprintf(out, outlen, "%u", (unsigned int) strlen(fmt));
107 /** Print the size of the attribute in bytes.
110 static ssize_t xlat_length(UNUSED void *instance, UNUSED REQUEST *request,
111 char const *fmt, char *out, size_t outlen)
114 while (isspace((int) *fmt)) fmt++;
116 if ((radius_get_vp(&vp, request, fmt) < 0) || !vp) {
121 snprintf(out, outlen, "%zu", vp->vp_length);
125 /** Print data as integer, not as VALUE.
128 static ssize_t xlat_integer(UNUSED void *instance, REQUEST *request,
129 char const *fmt, char *out, size_t outlen)
133 uint64_t int64 = 0; /* Needs to be initialised to zero */
134 uint32_t int32 = 0; /* Needs to be initialised to zero */
136 while (isspace((int) *fmt)) fmt++;
138 if ((radius_get_vp(&vp, request, fmt) < 0) || !vp) {
143 switch (vp->da->type) {
146 if (vp->vp_length > 8) {
150 if (vp->vp_length > 4) {
151 memcpy(&int64, vp->vp_octets, vp->vp_length);
152 return snprintf(out, outlen, "%" PRIu64, htonll(int64));
155 memcpy(&int32, vp->vp_octets, vp->vp_length);
156 return snprintf(out, outlen, "%i", htonl(int32));
158 case PW_TYPE_INTEGER64:
159 return snprintf(out, outlen, "%" PRIu64, vp->vp_integer64);
162 * IP addresses are treated specially, as parsing functions assume the value
163 * is bigendian and will convert it for us.
165 case PW_TYPE_IPV4_ADDR:
166 return snprintf(out, outlen, "%u", htonl(vp->vp_ipaddr));
168 case PW_TYPE_IPV4_PREFIX:
169 return snprintf(out, outlen, "%u", htonl((*(uint32_t *)(vp->vp_ipv4prefix + 2))));
171 case PW_TYPE_INTEGER:
173 return snprintf(out, outlen, "%u", vp->vp_integer);
175 return snprintf(out, outlen, "%u", (unsigned int) vp->vp_byte);
177 return snprintf(out, outlen, "%u", (unsigned int) vp->vp_short);
180 * Ethernet is weird... It's network related, so we assume to it should be
183 case PW_TYPE_ETHERNET:
184 memcpy(&int64, &vp->vp_ether, vp->vp_length);
185 return snprintf(out, outlen, "%" PRIu64, htonll(int64));
188 return snprintf(out, outlen, "%i", vp->vp_signed);
190 case PW_TYPE_IPV6_ADDR:
191 return fr_prints_uint128(out, outlen, ntohlll(*(uint128_t const *) &vp->vp_ipv6addr));
193 case PW_TYPE_IPV6_PREFIX:
194 return fr_prints_uint128(out, outlen, ntohlll(*(uint128_t const *) &(vp->vp_ipv6prefix[2])));
200 REDEBUG("Type '%s' of length %zu cannot be converted to integer",
201 fr_int2str(dict_attr_types, vp->da->type, "???"), vp->vp_length);
207 /** Print data as hex, not as VALUE.
210 static ssize_t xlat_hex(UNUSED void *instance, REQUEST *request,
211 char const *fmt, char *out, size_t outlen)
219 uint8_t const *buff = NULL;
221 while (isspace((int) *fmt)) fmt++;
223 if ((radius_get_vp(&vp, request, fmt) < 0) || !vp) {
232 if (vp->da->type == PW_TYPE_OCTETS) {
236 * Cast the value_data_t of the VP to an octets string and
240 ret = value_data_cast(request, &dst, PW_TYPE_OCTETS, NULL, vp->da->type,
241 NULL, &vp->data, vp->vp_length);
243 REDEBUG("%s", fr_strerror());
247 p = buff = dst.octets;
253 * Don't truncate the data.
255 if (outlen < (len * 2)) {
256 rad_const_free(buff);
260 for (i = 0; i < len; i++) {
261 snprintf(out + 2*i, 3, "%02x", p[i]);
263 rad_const_free(buff);
268 /** Return the tag of an attribute reference
271 static ssize_t xlat_tag(UNUSED void *instance, REQUEST *request,
272 char const *fmt, char *out, size_t outlen)
276 while (isspace((int) *fmt)) fmt++;
278 if ((radius_get_vp(&vp, request, fmt) < 0) || !vp) {
283 if (!vp->da->flags.has_tag || !TAG_VALID(vp->tag)) {
288 return snprintf(out, outlen, "%u", vp->tag);
291 /** Print out attribute info
293 * Prints out all instances of a current attribute, or all attributes in a list.
295 * At higher debugging levels, also prints out alternative decodings of the same
296 * value. This is helpful to determine types for unknown attributes of long
297 * passed vendors, or just crazy/broken NAS.
299 * It's also useful for exposing issues in the packet decoding functions, as in
300 * some cases they get fed random garbage data.
302 * This expands to a zero length string.
304 static ssize_t xlat_debug_attr(UNUSED void *instance, REQUEST *request, char const *fmt,
305 char *out, UNUSED size_t outlen)
310 value_pair_tmpl_t vpt;
312 if (!RDEBUG_ENABLED2) {
317 while (isspace((int) *fmt)) fmt++;
319 if (tmpl_from_attr_str(&vpt, fmt, REQUEST_CURRENT, PAIR_LIST_REQUEST, false) <= 0) {
320 RDEBUG("%s", fr_strerror());
324 RIDEBUG("Attributes matching \"%s\"", fmt);
327 for (vp = tmpl_cursor_init(NULL, &cursor, request, &vpt);
329 vp = tmpl_cursor_next(&cursor, &vpt)) {
330 FR_NAME_NUMBER const *type;
333 value = vp_aprints_value(vp, vp, '\'');
334 if (vp->da->flags.has_tag) {
335 RIDEBUG2("&%s:%s:%i %s %s",
336 fr_int2str(pair_lists, vpt.tmpl_list, "<INVALID>"),
339 fr_int2str(fr_tokens, vp->op, "<INVALID>"),
342 RIDEBUG2("&%s:%s %s %s",
343 fr_int2str(pair_lists, vpt.tmpl_list, "<INVALID>"),
345 fr_int2str(fr_tokens, vp->op, "<INVALID>"),
350 if (!RDEBUG_ENABLED3) continue;
352 if (vp->da->vendor) {
355 dv = dict_vendorbyvalue(vp->da->vendor);
356 RIDEBUG2("Vendor : %i (%s)", vp->da->vendor, dv ? dv->name : "unknown");
358 RIDEBUG2("Type : %s", fr_int2str(dict_attr_types, vp->da->type, "<INVALID>"));
359 RIDEBUG2("Length : %zu", vp->vp_length);
361 if (!RDEBUG_ENABLED4) continue;
363 type = dict_attr_types;
367 value_data_t *dst = NULL;
371 if ((PW_TYPE) type->number == vp->da->type) {
375 switch (type->number) {
376 case PW_TYPE_INVALID: /* Not real type */
377 case PW_TYPE_MAX: /* Not real type */
378 case PW_TYPE_EXTENDED: /* Not safe/appropriate */
379 case PW_TYPE_LONG_EXTENDED: /* Not safe/appropriate */
380 case PW_TYPE_TLV: /* Not safe/appropriate */
381 case PW_TYPE_EVS: /* Not safe/appropriate */
382 case PW_TYPE_VSA: /* @fixme We need special behaviour for these */
383 case PW_TYPE_COMBO_IP_ADDR: /* Covered by IPv4 address IPv6 address */
384 case PW_TYPE_COMBO_IP_PREFIX: /* Covered by IPv4 address IPv6 address */
385 case PW_TYPE_TIMEVAL: /* Not a VALUE_PAIR type */
393 dst = talloc_zero(vp, value_data_t);
394 ret = value_data_cast(dst, dst, type->number, NULL, vp->da->type, vp->da,
395 &vp->data, vp->vp_length);
396 if (ret < 0) goto next_type; /* We expect some to fail */
398 value = vp_data_aprints_value(dst, type->number, NULL, dst, (size_t)ret, '\'');
399 if (!value) goto next_type;
401 if ((pad = (11 - strlen(type->name))) < 0) {
406 RDEBUG2("as %s%*s: %s", type->name, pad, " ", value);
419 /** Prints the current module processing the request
422 static ssize_t xlat_module(UNUSED void *instance, REQUEST *request,
423 UNUSED char const *fmt, char *out, size_t outlen)
425 strlcpy(out, request->module, outlen);
430 #if defined(HAVE_REGEX) && defined(HAVE_PCRE)
431 static ssize_t xlat_regex(UNUSED void *instance, REQUEST *request,
432 UNUSED char const *fmt, char *out, size_t outlen)
437 if (regex_request_to_sub_named(request, &p, request, fmt) < 0) {
438 RDEBUG("Named capture group \"%s\" not found", fmt);
443 len = talloc_array_length(p);
445 RDEBUG("Insufficient buffer space to write subcapture value, needed %zu bytes, have %zu bytes",
449 strlcpy(out, p, outlen);
451 return len - 1; /* - \0 */
456 /** Implements the Foreach-Variable-X
460 static ssize_t xlat_foreach(void *instance, REQUEST *request,
461 UNUSED char const *fmt, char *out, size_t outlen)
467 * See modcall, "FOREACH" for how this works.
469 pvp = (VALUE_PAIR **) request_data_reference(request, radius_get_vp, *(int*) instance);
475 len = vp_prints_value(out, outlen, *pvp, 0);
476 if (is_truncated(len, outlen)) {
477 RDEBUG("Insufficient buffer space to write foreach value");
485 /** Print data as string, if possible.
487 * If attribute "Foo" is defined as "octets" it will normally
488 * be printed as 0x0a0a0a. The xlat "%{string:Foo}" will instead
491 static ssize_t xlat_string(UNUSED void *instance, REQUEST *request,
492 char const *fmt, char *out, size_t outlen)
499 while (isspace((int) *fmt)) fmt++;
507 if ((radius_get_vp(&vp, request, fmt) < 0) || !vp) goto nothing;
509 ret = rad_vp2data(&p, vp);
514 switch (vp->da->type) {
516 len = fr_prints(out, outlen, (char const *) p, vp->vp_length, '"');
520 len = strlcpy(out, vp->vp_strvalue, outlen);
524 len = fr_prints(out, outlen, (char const *) p, ret, '\0');
531 /** xlat expand string attribute value
534 static ssize_t xlat_xlat(UNUSED void *instance, REQUEST *request,
535 char const *fmt, char *out, size_t outlen)
539 while (isspace((int) *fmt)) fmt++;
547 if ((radius_get_vp(&vp, request, fmt) < 0) || !vp) goto nothing;
549 return radius_xlat(out, outlen, request, vp->vp_strvalue, NULL, NULL);
552 /** Dynamically change the debugging level for the current request
556 static ssize_t xlat_debug(UNUSED void *instance, REQUEST *request,
557 char const *fmt, char *out, size_t outlen)
562 * Expand to previous (or current) level
564 snprintf(out, outlen, "%d", request->log.lvl & RAD_REQUEST_OPTION_DEBUG4);
567 * Assume we just want to get the current value and NOT set it to 0
574 request->log.lvl = RAD_REQUEST_OPTION_NONE;
575 request->log.func = NULL;
577 if (level > 4) level = 4;
579 request->log.lvl = level;
580 request->log.func = vradlog_request;
588 * Compare two xlat_t structs, based ONLY on the module name.
590 static int xlat_cmp(void const *one, void const *two)
592 xlat_t const *a = one;
593 xlat_t const *b = two;
595 if (a->length != b->length) {
596 return a->length - b->length;
599 return memcmp(a->name, b->name, a->length);
604 * find the appropriate registered xlat function.
606 static xlat_t *xlat_find(char const *name)
610 strlcpy(my_xlat.name, name, sizeof(my_xlat.name));
611 my_xlat.length = strlen(my_xlat.name);
613 return rbtree_finddata(xlat_root, &my_xlat);
617 /** Register an xlat function.
619 * @param[in] name xlat name.
620 * @param[in] func xlat function to be called.
621 * @param[in] escape function to sanitize any sub expansions passed to the xlat function.
622 * @param[in] instance of module that's registering the xlat function.
623 * @return 0 on success, -1 on failure
625 int xlat_register(char const *name, RAD_XLAT_FUNC func, RADIUS_ESCAPE_STRING escape, void *instance)
631 if (!name || !*name) {
632 DEBUG("xlat_register: Invalid xlat name");
637 * First time around, build up the tree...
639 * FIXME: This code should be hoisted out of this function,
640 * and into a global "initialization". But it isn't critical...
647 xlat_root = rbtree_create(NULL, xlat_cmp, NULL, RBTREE_FLAG_REPLACE);
649 DEBUG("xlat_register: Failed to create tree");
654 for (i = 0; xlat_foreach_names[i] != NULL; i++) {
655 xlat_register(xlat_foreach_names[i],
656 xlat_foreach, NULL, &xlat_inst[i]);
657 c = xlat_find(xlat_foreach_names[i]);
658 rad_assert(c != NULL);
663 #define XLAT_REGISTER(_x) xlat_register(STRINGIFY(_x), xlat_ ## _x, NULL, NULL); \
664 c = xlat_find(STRINGIFY(_x)); \
665 rad_assert(c != NULL); \
668 XLAT_REGISTER(integer);
669 XLAT_REGISTER(strlen);
670 XLAT_REGISTER(length);
673 XLAT_REGISTER(string);
675 XLAT_REGISTER(module);
676 XLAT_REGISTER(debug_attr);
677 #if defined(HAVE_REGEX) && defined(HAVE_PCRE)
678 XLAT_REGISTER(regex);
681 xlat_register("debug", xlat_debug, NULL, &xlat_inst[0]);
682 c = xlat_find("debug");
683 rad_assert(c != NULL);
688 * If it already exists, replace the instance.
690 strlcpy(my_xlat.name, name, sizeof(my_xlat.name));
691 my_xlat.length = strlen(my_xlat.name);
692 c = rbtree_finddata(xlat_root, &my_xlat);
695 DEBUG("xlat_register: Cannot re-define internal xlat");
701 c->instance = instance;
706 * Doesn't exist. Create it.
708 c = talloc_zero(xlat_root, xlat_t);
712 strlcpy(c->name, name, sizeof(c->name));
713 c->length = strlen(c->name);
714 c->instance = instance;
716 node = rbtree_insert_node(xlat_root, c);
723 * Ensure that the data is deleted when the node is
726 * @todo: Maybe this should be the other way around...
727 * when a thing IN the tree is deleted, it's automatically
728 * removed from the tree. But for now, this works.
730 (void) talloc_steal(node, c);
734 /** Unregister an xlat function
736 * We can only have one function to call per name, so the passing of "func"
737 * here is extraneous.
739 * @param[in] name xlat to unregister.
740 * @param[in] func unused.
741 * @param[in] instance data.
743 void xlat_unregister(char const *name, UNUSED RAD_XLAT_FUNC func, void *instance)
750 strlcpy(my_xlat.name, name, sizeof(my_xlat.name));
751 my_xlat.length = strlen(my_xlat.name);
753 c = rbtree_finddata(xlat_root, &my_xlat);
756 if (c->instance != instance) return;
758 rbtree_deletebydata(xlat_root, c);
761 static int xlat_unregister_callback(void *instance, void *data)
763 xlat_t *c = (xlat_t *) data;
765 if (c->instance != instance) return 0; /* keep walking */
767 return 2; /* delete it */
770 void xlat_unregister_module(void *instance)
772 rbtree_walk(xlat_root, RBTREE_DELETE_ORDER, xlat_unregister_callback, instance);
776 * Internal redundant handler for xlats
778 typedef enum xlat_redundant_type_t {
782 XLAT_REDUNDANT_LOAD_BALANCE,
783 } xlat_redundant_type_t;
785 typedef struct xlat_redundant_t {
786 xlat_redundant_type_t type;
792 static ssize_t xlat_redundant(void *instance, REQUEST *request,
793 char const *fmt, char *out, size_t outlen)
795 xlat_redundant_t *xr = instance;
800 rad_assert(xr->type == XLAT_REDUNDANT);
803 * Pick the first xlat which succeeds
805 for (ci = cf_item_find_next(xr->cs, NULL);
807 ci = cf_item_find_next(xr->cs, ci)) {
810 if (!cf_item_is_pair(ci)) continue;
812 name = cf_pair_attr(cf_itemtopair(ci));
813 rad_assert(name != NULL);
815 xlat = xlat_find(name);
818 rcode = xlat->func(xlat->instance, request, fmt, out, outlen);
819 if (rcode <= 0) continue;
824 * Everything failed. Oh well.
831 static ssize_t xlat_load_balance(void *instance, REQUEST *request,
832 char const *fmt, char *out, size_t outlen)
835 xlat_redundant_t *xr = instance;
837 CONF_ITEM *found = NULL;
842 * Choose a child at random.
844 for (ci = cf_item_find_next(xr->cs, NULL);
846 ci = cf_item_find_next(xr->cs, ci)) {
847 if (!cf_item_is_pair(ci)) continue;
851 * Replace the previously found one with a random
854 if ((count * (fr_rand() & 0xffff)) < (uint32_t) 0x10000) {
860 * Plain load balancing: do one child, and only one child.
862 if (xr->type == XLAT_LOAD_BALANCE) {
863 name = cf_pair_attr(cf_itemtopair(found));
864 rad_assert(name != NULL);
866 xlat = xlat_find(name);
867 if (!xlat) return -1;
869 return xlat->func(xlat->instance, request, fmt, out, outlen);
872 rad_assert(xr->type == XLAT_REDUNDANT_LOAD_BALANCE);
875 * Try the random one we found. If it fails, keep going
876 * through the rest of the children.
880 name = cf_pair_attr(cf_itemtopair(ci));
881 rad_assert(name != NULL);
883 xlat = xlat_find(name);
887 rcode = xlat->func(xlat->instance, request, fmt, out, outlen);
888 if (rcode > 0) return rcode;
892 * Go to the next one, wrapping around at the end.
894 ci = cf_item_find_next(xr->cs, ci);
895 if (!ci) ci = cf_item_find_next(xr->cs, NULL);
896 } while (ci != found);
902 bool xlat_register_redundant(CONF_SECTION *cs)
904 char const *name1, *name2;
905 xlat_redundant_t *xr;
907 name1 = cf_section_name1(cs);
908 name2 = cf_section_name2(cs);
910 if (!name2) return false;
912 if (xlat_find(name2)) {
913 cf_log_err_cs(cs, "An expansion is already registered for this name");
917 xr = talloc_zero(cs, xlat_redundant_t);
918 if (!xr) return false;
920 if (strcmp(name1, "redundant") == 0) {
921 xr->type = XLAT_REDUNDANT;
923 } else if (strcmp(name1, "redundant-load-balance") == 0) {
924 xr->type = XLAT_REDUNDANT_LOAD_BALANCE;
926 } else if (strcmp(name1, "load-balance") == 0) {
927 xr->type = XLAT_LOAD_BALANCE;
936 * Get the number of children for load balancing.
938 if (xr->type == XLAT_REDUNDANT) {
939 if (xlat_register(name2, xlat_redundant, NULL, xr) < 0) {
947 for (ci = cf_item_find_next(cs, NULL);
949 ci = cf_item_find_next(cs, ci)) {
950 if (!cf_item_is_pair(ci)) continue;
952 if (!xlat_find(cf_pair_attr(cf_itemtopair(ci)))) {
960 if (xlat_register(name2, xlat_load_balance, NULL, xr) < 0) {
970 /** Crappy temporary function to add attribute ref support to xlats
972 * This needs to die, and hopefully will die, when xlat functions accept
973 * xlat node structures.
975 * Provides either a pointer to a buffer which contains the value of the reference VALUE_PAIR
976 * in an architecture independent format. Or a pointer to the start of the fmt string.
978 * The pointer is only guaranteed to be valid between calls to xlat_fmt_to_ref,
979 * and so long as the source VALUE_PAIR is not freed.
981 * @param out where to write a pointer to the buffer to the data the xlat function needs to work on.
982 * @param request current request.
984 * @returns the length of the data or -1 on error.
986 ssize_t xlat_fmt_to_ref(uint8_t const **out, REQUEST *request, char const *fmt)
990 while (isspace((int) *fmt)) fmt++;
993 if ((radius_get_vp(&vp, request, fmt) < 0) || !vp) {
998 return rad_vp2data(out, vp);
1001 *out = (uint8_t const *)fmt;
1005 /** De-register all xlat functions, used mainly for debugging.
1008 void xlat_free(void)
1010 rbtree_free(xlat_root);
1014 # define XLAT_DEBUG DEBUG3
1016 # define XLAT_DEBUG(...)
1019 static ssize_t xlat_tokenize_expansion(TALLOC_CTX *ctx, char *fmt, xlat_exp_t **head,
1020 char const **error);
1021 static ssize_t xlat_tokenize_literal(TALLOC_CTX *ctx, char *fmt, xlat_exp_t **head,
1022 bool brace, char const **error);
1023 static size_t xlat_process(char **out, REQUEST *request, xlat_exp_t const * const head,
1024 RADIUS_ESCAPE_STRING escape, void *escape_ctx);
1026 static ssize_t xlat_tokenize_alternation(TALLOC_CTX *ctx, char *fmt, xlat_exp_t **head,
1033 rad_assert(fmt[0] == '%');
1034 rad_assert(fmt[1] == '{');
1035 rad_assert(fmt[2] == '%');
1036 rad_assert(fmt[3] == '{');
1038 XLAT_DEBUG("ALTERNATE <-- %s", fmt);
1040 node = talloc_zero(ctx, xlat_exp_t);
1041 node->type = XLAT_ALTERNATE;
1044 slen = xlat_tokenize_expansion(node, p, &node->child, error);
1047 return slen - (p - fmt);
1053 *error = "Expected ':' after first expansion";
1060 *error = "Expected '-' after ':'";
1066 * Allow the RHS to be empty as a special case.
1070 * Hack up an empty string.
1072 node->alternate = talloc_zero(node, xlat_exp_t);
1073 node->alternate->type = XLAT_LITERAL;
1074 node->alternate->fmt = talloc_typed_strdup(node->alternate, "");
1078 slen = xlat_tokenize_literal(node, p, &node->alternate, true, error);
1081 return slen - (p - fmt);
1084 if (!node->alternate) {
1086 *error = "Empty expansion is invalid";
1096 static ssize_t xlat_tokenize_expansion(TALLOC_CTX *ctx, char *fmt, xlat_exp_t **head,
1104 rad_assert(fmt[0] == '%');
1105 rad_assert(fmt[1] == '{');
1110 if ((fmt[2] == '%') && (fmt[3] == '{')) return xlat_tokenize_alternation(ctx, fmt, head, error);
1112 XLAT_DEBUG("EXPANSION <-- %s", fmt);
1113 node = talloc_zero(ctx, xlat_exp_t);
1114 node->fmt = fmt + 2;
1119 * Handle regex's specially.
1122 num = strtol(p, &q, 10);
1123 if (p != q && (*q == '}')) {
1124 XLAT_DEBUG("REGEX <-- %s", fmt);
1127 if ((num > REQUEST_MAX_REGEX) || (num < 0)) {
1129 *error = "Invalid regex reference. Must be in range 0-" STRINGIFY(REQUEST_MAX_REGEX);
1132 node->attr.tmpl_num = num;
1134 node->type = XLAT_REGEX;
1137 return (q - fmt) + 1;
1139 #endif /* HAVE_REGEX */
1144 * %{Tunnel-Password:1}
1145 * %{Tunnel-Password:1[#]}
1146 * %{request:Attr-Name}
1147 * %{request:Tunnel-Password:1}
1148 * %{request:Tunnel-Password:1[#]}
1153 * This is for efficiency, so we don't search for an xlat,
1154 * when what's being referenced is obviously an attribute.
1157 for (q = p; *q != '\0'; q++) {
1158 if (*q == ':') break;
1160 if (isspace((int) *q)) break;
1162 if (*q == '[') continue;
1164 if (*q == '}') break;
1168 * Check for empty expressions %{}
1170 if ((*q == '}') && (q == p)) {
1171 *error = "Empty expression is invalid";
1176 * Might be a module name reference.
1178 * If it's not, it's an attribute or parse error.
1182 node->xlat = xlat_find(node->fmt);
1187 node->type = XLAT_MODULE;
1190 XLAT_DEBUG("MOD <-- %s ... %s", node->fmt, p);
1192 slen = xlat_tokenize_literal(node, p, &node->child, true, error);
1195 return slen - (p - fmt);
1200 rad_assert(node->next == NULL);
1204 *q = ':'; /* Avoids a strdup */
1208 * The first token ends with:
1209 * - '[' - Which is an attribute index, so it must be an attribute.
1210 * - '}' - The end of the expansion, which means it was a bareword.
1212 slen = tmpl_from_attr_substr(&node->attr, p, REQUEST_CURRENT, PAIR_LIST_REQUEST, true);
1215 * If the parse error occurred before the ':'
1216 * then the error is changed to 'Unknown module',
1217 * as it was more likely to be a bad module name,
1218 * than a request qualifier.
1220 if ((*q == ':') && ((p + (slen * -1)) < q)) {
1221 *error = "Unknown module";
1223 *error = fr_strerror();
1225 return slen - (p - fmt);
1229 * Might be a virtual XLAT attribute
1231 if (node->attr.type == TMPL_TYPE_ATTR_UNDEFINED) {
1232 node->xlat = xlat_find(node->attr.tmpl_unknown_name);
1234 node->type = XLAT_VIRTUAL;
1235 node->fmt = node->attr.tmpl_unknown_name;
1237 XLAT_DEBUG("VIRTUAL <-- %s", node->fmt);
1239 rad_assert(node->next == NULL);
1245 *error = "Unknown attribute";
1249 node->type = XLAT_ATTRIBUTE;
1254 *error = "No matching closing brace";
1255 return -1; /* second character of format string */
1259 rad_assert(node->next == NULL);
1265 static ssize_t xlat_tokenize_literal(TALLOC_CTX *ctx, char *fmt, xlat_exp_t **head,
1266 bool brace, char const **error)
1271 if (!*fmt) return 0;
1273 XLAT_DEBUG("LITERAL <-- %s", fmt);
1275 node = talloc_zero(ctx, xlat_exp_t);
1278 node->type = XLAT_LITERAL;
1286 *error = "Invalid escape at end of string";
1294 * Process the expansion.
1296 if ((p[0] == '%') && (p[1] == '{')) {
1299 XLAT_DEBUG("EXPANSION-2 <-- %s", node->fmt);
1301 slen = xlat_tokenize_expansion(node, p, &node->next, error);
1304 return slen - (p - fmt);
1306 *p = '\0'; /* end the literal */
1309 rad_assert(node->next != NULL);
1312 * Short-circuit the recursive call.
1313 * This saves another function call and
1314 * memory allocation.
1319 * "foo %{User-Name} bar"
1321 * EXPANSION User-Name
1324 slen = xlat_tokenize_literal(node->next, p, &(node->next->next), brace, error);
1325 rad_assert(slen != 0);
1328 return slen - (p - fmt);
1331 brace = false; /* it was found above, or else the above code errored out */
1333 break; /* stop processing the string */
1337 * Check for valid single-character expansions.
1343 if (!p[1] || !strchr("%dlmntDGHISTYv", p[1])) {
1345 *error = "Invalid variable expansion";
1350 next = talloc_zero(node, xlat_exp_t);
1354 next->fmt = talloc_typed_strdup(next, "%");
1356 XLAT_DEBUG("LITERAL-PERCENT <-- %s", next->fmt);
1357 next->type = XLAT_LITERAL;
1362 XLAT_DEBUG("PERCENT <-- %c", *next->fmt);
1363 next->type = XLAT_PERCENT;
1375 slen = xlat_tokenize_literal(node->next, p, &(node->next->next), brace, error);
1376 rad_assert(slen != 0);
1379 return slen - (p - fmt);
1382 brace = false; /* it was found above, or else the above code errored out */
1384 break; /* stop processing the string */
1388 * If required, eat the brace.
1390 if (brace && (*p == '}')) {
1402 * We were told to look for a brace, but we ran off of
1403 * the end of the string before we found one.
1406 *error = "Missing closing brace at end of string";
1411 * Squash zero-width literals
1413 if (node->len > 0) {
1417 (void) talloc_steal(ctx, node->next);
1426 static char const xlat_tabs[] = " ";
1428 static void xlat_tokenize_debug(xlat_exp_t const *node, int lvl)
1430 rad_assert(node != NULL);
1432 if (lvl >= (int) sizeof(xlat_tabs)) lvl = sizeof(xlat_tabs);
1435 switch (node->type) {
1437 DEBUG("%.*sliteral --> %s", lvl, xlat_tabs, node->fmt);
1441 DEBUG("%.*spercent --> %c", lvl, xlat_tabs, node->fmt[0]);
1444 case XLAT_ATTRIBUTE:
1445 rad_assert(node->attr.tmpl_da != NULL);
1446 DEBUG("%.*sattribute --> %s", lvl, xlat_tabs, node->attr.tmpl_da->name);
1447 rad_assert(node->child == NULL);
1448 if ((node->attr.tmpl_tag != TAG_ANY) || (node->attr.tmpl_num != NUM_ANY)) {
1449 DEBUG("%.*s{", lvl, xlat_tabs);
1451 DEBUG("%.*sref %d", lvl + 1, xlat_tabs, node->attr.tmpl_request);
1452 DEBUG("%.*slist %d", lvl + 1, xlat_tabs, node->attr.tmpl_list);
1454 if (node->attr.tmpl_tag != TAG_ANY) {
1455 DEBUG("%.*stag %d", lvl + 1, xlat_tabs, node->attr.tmpl_tag);
1457 if (node->attr.tmpl_num != NUM_ANY) {
1458 if (node->attr.tmpl_num == NUM_COUNT) {
1459 DEBUG("%.*s[#]", lvl + 1, xlat_tabs);
1460 } else if (node->attr.tmpl_num == NUM_ALL) {
1461 DEBUG("%.*s[*]", lvl + 1, xlat_tabs);
1463 DEBUG("%.*s[%d]", lvl + 1, xlat_tabs, node->attr.tmpl_num);
1467 DEBUG("%.*s}", lvl, xlat_tabs);
1472 rad_assert(node->fmt != NULL);
1473 DEBUG("%.*svirtual --> %s", lvl, xlat_tabs, node->fmt);
1477 rad_assert(node->xlat != NULL);
1478 DEBUG("%.*sxlat --> %s", lvl, xlat_tabs, node->xlat->name);
1480 DEBUG("%.*s{", lvl, xlat_tabs);
1481 xlat_tokenize_debug(node->child, lvl + 1);
1482 DEBUG("%.*s}", lvl, xlat_tabs);
1488 DEBUG("%.*sregex-var --> %d", lvl, xlat_tabs, node->attr.tmpl_num);
1492 case XLAT_ALTERNATE:
1493 DEBUG("%.*sif {", lvl, xlat_tabs);
1494 xlat_tokenize_debug(node->child, lvl + 1);
1495 DEBUG("%.*s}", lvl, xlat_tabs);
1496 DEBUG("%.*selse {", lvl, xlat_tabs);
1497 xlat_tokenize_debug(node->alternate, lvl + 1);
1498 DEBUG("%.*s}", lvl, xlat_tabs);
1505 size_t xlat_sprint(char *buffer, size_t bufsize, xlat_exp_t const *node)
1516 end = buffer + bufsize;
1519 switch (node->type) {
1521 strlcpy(p, node->fmt, end - p);
1527 p[1] = node->fmt[0];
1531 case XLAT_ATTRIBUTE:
1535 if (node->attr.tmpl_request != REQUEST_CURRENT) {
1536 strlcpy(p, fr_int2str(request_refs, node->attr.tmpl_request, "??"), end - p);
1541 if ((node->attr.tmpl_request != REQUEST_CURRENT) ||
1542 (node->attr.tmpl_list != PAIR_LIST_REQUEST)) {
1543 strlcpy(p, fr_int2str(pair_lists, node->attr.tmpl_list, "??"), end - p);
1548 strlcpy(p, node->attr.tmpl_da->name, end - p);
1551 if (node->attr.tmpl_tag != TAG_ANY) {
1553 snprintf(p, end - p, "%u", node->attr.tmpl_tag);
1557 if (node->attr.tmpl_num != NUM_ANY) {
1559 switch (node->attr.tmpl_num) {
1569 snprintf(p, end - p, "%i", node->attr.tmpl_num);
1578 snprintf(p, end - p, "%%{%i}", node->attr.tmpl_num);
1585 strlcpy(p, node->fmt, end - p);
1593 strlcpy(p, node->xlat->name, end - p);
1596 rad_assert(node->child != NULL);
1597 len = xlat_sprint(p, end - p, node->child);
1602 case XLAT_ALTERNATE:
1606 len = xlat_sprint(p, end - p, node->child);
1612 len = xlat_sprint(p, end - p, node->alternate);
1620 if (p == end) break;
1630 ssize_t xlat_tokenize(TALLOC_CTX *ctx, char *fmt, xlat_exp_t **head,
1633 return xlat_tokenize_literal(ctx, fmt, head, false, error);
1637 /** Tokenize an xlat expansion
1639 * @param[in] request the input request. Memory will be attached here.
1640 * @param[in] fmt the format string to expand
1641 * @param[out] head the head of the xlat list / tree structure.
1643 static ssize_t xlat_tokenize_request(REQUEST *request, char const *fmt, xlat_exp_t **head)
1647 char const *error = NULL;
1652 * Copy the original format string to a buffer so that
1653 * the later functions can mangle it in-place, which is
1656 tokens = talloc_typed_strdup(request, fmt);
1657 if (!tokens) return -1;
1659 slen = xlat_tokenize_literal(request, tokens, head, false, &error);
1662 * Zero length expansion, return a zero length node.
1665 *head = talloc_zero(request, xlat_exp_t);
1669 * Output something like:
1672 * " ^ error was here"
1675 talloc_free(tokens);
1676 rad_assert(error != NULL);
1678 REMARKER(fmt, -slen, error);
1682 if (*head && (debug_flag > 2)) {
1684 DEBUG("Parsed xlat tree:");
1685 xlat_tokenize_debug(*head, 0);
1689 * All of the nodes point to offsets in the "tokens"
1690 * string. Let's ensure that free'ing head will free
1693 (void) talloc_steal(*head, tokens);
1699 static char *xlat_getvp(TALLOC_CTX *ctx, REQUEST *request, value_pair_tmpl_t const *vpt,
1700 bool escape, bool return_null)
1702 VALUE_PAIR *vp = NULL, *virtual = NULL;
1703 RADIUS_PACKET *packet = NULL;
1708 char quote = escape ? '"' : '\0';
1713 * See if we're dealing with an attribute in the request
1715 * This allows users to manipulate virtual attributes as if
1716 * they were real ones.
1718 vp = tmpl_cursor_init(&err, &cursor, request, vpt);
1719 if (vp) goto do_print;
1722 * We didn't find the VP in a list.
1723 * If it's not a virtual one, and we're not meant to
1724 * be counting it, return.
1726 if (!vpt->tmpl_da->flags.virtual) {
1727 if (vpt->tmpl_num == NUM_COUNT) goto do_print;
1732 * Switch out the request to the one specified by the template
1734 if (radius_request(&request, vpt->tmpl_request) < 0) return NULL;
1737 * Some non-packet expansions
1739 switch (vpt->tmpl_da->attr) {
1741 break; /* ignore them */
1743 case PW_CLIENT_SHORTNAME:
1744 if (vpt->tmpl_num == NUM_COUNT) goto count_virtual;
1745 if (request->client && request->client->shortname) {
1746 return talloc_typed_strdup(ctx, request->client->shortname);
1748 return talloc_typed_strdup(ctx, "<UNKNOWN-CLIENT>");
1750 case PW_REQUEST_PROCESSING_STAGE:
1751 if (vpt->tmpl_num == NUM_COUNT) goto count_virtual;
1752 if (request->component) {
1753 return talloc_typed_strdup(ctx, request->component);
1755 return talloc_typed_strdup(ctx, "server_core");
1757 case PW_VIRTUAL_SERVER:
1758 if (vpt->tmpl_num == NUM_COUNT) goto count_virtual;
1759 if (!request->server) return NULL;
1760 return talloc_typed_strdup(ctx, request->server);
1762 case PW_MODULE_RETURN_CODE:
1763 if (vpt->tmpl_num == NUM_COUNT) goto count_virtual;
1764 if (!request->rcode) return NULL;
1765 return talloc_typed_strdup(ctx, fr_int2str(modreturn_table, request->rcode, ""));
1769 * All of the attributes must now refer to a packet.
1770 * If there's no packet, we can't print any attribute
1773 packet = radius_packet(request, vpt->tmpl_list);
1775 if (return_null) return NULL;
1776 return vp_aprints_type(ctx, vpt->tmpl_da->type);
1780 switch (vpt->tmpl_da->attr) {
1784 case PW_PACKET_TYPE:
1785 dv = dict_valbyattr(PW_PACKET_TYPE, 0, packet->code);
1786 if (dv) return talloc_typed_strdup(ctx, dv->name);
1787 return talloc_typed_asprintf(ctx, "%d", packet->code);
1789 case PW_RESPONSE_PACKET_TYPE:
1794 if (request->proxy_reply && (!request->reply || !request->reply->code)) {
1795 code = request->proxy_reply->code;
1798 if (request->reply) {
1799 code = request->reply->code;
1802 return talloc_typed_strdup(ctx, fr_packet_codes[code]);
1806 * Virtual attributes which require a temporary VALUE_PAIR
1807 * to be allocated. We can't use stack allocated memory
1808 * because of the talloc checks sprinkled throughout the
1809 * various VP functions.
1811 case PW_PACKET_AUTHENTICATION_VECTOR:
1812 virtual = pairalloc(ctx, vpt->tmpl_da);
1813 pairmemcpy(virtual, packet->vector, sizeof(packet->vector));
1817 case PW_CLIENT_IP_ADDRESS:
1818 case PW_PACKET_SRC_IP_ADDRESS:
1819 if (packet->src_ipaddr.af == AF_INET) {
1820 virtual = pairalloc(ctx, vpt->tmpl_da);
1821 virtual->vp_ipaddr = packet->src_ipaddr.ipaddr.ip4addr.s_addr;
1826 case PW_PACKET_DST_IP_ADDRESS:
1827 if (packet->dst_ipaddr.af == AF_INET) {
1828 virtual = pairalloc(ctx, vpt->tmpl_da);
1829 virtual->vp_ipaddr = packet->dst_ipaddr.ipaddr.ip4addr.s_addr;
1834 case PW_PACKET_SRC_IPV6_ADDRESS:
1835 if (packet->src_ipaddr.af == AF_INET6) {
1836 virtual = pairalloc(ctx, vpt->tmpl_da);
1837 memcpy(&virtual->vp_ipv6addr,
1838 &packet->src_ipaddr.ipaddr.ip6addr,
1839 sizeof(packet->src_ipaddr.ipaddr.ip6addr));
1844 case PW_PACKET_DST_IPV6_ADDRESS:
1845 if (packet->dst_ipaddr.af == AF_INET6) {
1846 virtual = pairalloc(ctx, vpt->tmpl_da);
1847 memcpy(&virtual->vp_ipv6addr,
1848 &packet->dst_ipaddr.ipaddr.ip6addr,
1849 sizeof(packet->dst_ipaddr.ipaddr.ip6addr));
1854 case PW_PACKET_SRC_PORT:
1855 virtual = pairalloc(ctx, vpt->tmpl_da);
1856 virtual->vp_integer = packet->src_port;
1860 case PW_PACKET_DST_PORT:
1861 virtual = pairalloc(ctx, vpt->tmpl_da);
1862 virtual->vp_integer = packet->dst_port;
1868 * Fake various operations for virtual attributes.
1871 if (vpt->tmpl_num != NUM_ANY) switch (vpt->tmpl_num) {
1873 * [n] is NULL (we only have [0])
1878 * [*] means only one.
1884 * [#] means 1 (as there's only one)
1888 ret = talloc_strdup(ctx, "1");
1892 * [0] is fine (get the first instance)
1901 switch (vpt->tmpl_num) {
1903 * Return a count of the VPs.
1909 fr_cursor_first(&cursor);
1910 while (fr_cursor_next_by_da(&cursor, vpt->tmpl_da, vpt->tmpl_tag)) count++;
1912 return talloc_typed_asprintf(ctx, "%d", count);
1917 * Concatenate all values together,
1918 * separated by commas.
1924 if (!fr_cursor_current(&cursor)) return NULL;
1925 p = vp_aprints_value(ctx, vp, quote);
1926 if (!p) return NULL;
1928 while ((vp = tmpl_cursor_next(&cursor, vpt)) != NULL) {
1929 q = vp_aprints_value(ctx, vp, quote);
1930 if (!q) return NULL;
1931 p = talloc_strdup_append(p, ",");
1932 p = talloc_strdup_append(p, q);
1940 * The cursor was set to the correct
1941 * position above by tmpl_cursor_init.
1943 vp = fr_cursor_current(&cursor);
1948 if (return_null) return NULL;
1949 return vp_aprints_type(ctx, vpt->tmpl_da->type);
1953 ret = vp_aprints_value(ctx, vp, quote);
1956 talloc_free(virtual);
1961 static const char xlat_spaces[] = " ";
1964 static char *xlat_aprint(TALLOC_CTX *ctx, REQUEST *request, xlat_exp_t const * const node,
1965 RADIUS_ESCAPE_STRING escape, void *escape_ctx, int lvl)
1968 char *str = NULL, *child;
1971 XLAT_DEBUG("%.*sxlat aprint %d", lvl, xlat_spaces, node->type);
1973 switch (node->type) {
1975 * Don't escape this.
1978 XLAT_DEBUG("xlat_aprint LITERAL");
1979 return talloc_typed_strdup(ctx, node->fmt);
1982 * Do a one-character expansion.
1987 size_t freespace = 256;
1991 XLAT_DEBUG("xlat_aprint PERCENT");
1993 str = talloc_array(ctx, char, freespace); /* @todo do better allocation */
1996 when = request->timestamp;
1997 if (request->packet) {
1998 when = request->packet->timestamp.tv_sec;
2007 case 'd': /* request day */
2008 if (!localtime_r(&when, &ts)) goto error;
2009 strftime(str, freespace, "%d", &ts);
2012 case 'l': /* request timestamp */
2013 snprintf(str, freespace, "%lu",
2014 (unsigned long) when);
2017 case 'm': /* request month */
2018 if (!localtime_r(&when, &ts)) goto error;
2019 strftime(str, freespace, "%m", &ts);
2022 case 'n': /* Request Number*/
2023 snprintf(str, freespace, "%u", request->number);
2026 case 't': /* request timestamp */
2027 CTIME_R(&when, str, freespace);
2028 nl = strchr(str, '\n');
2032 case 'D': /* request date */
2033 if (!localtime_r(&when, &ts)) goto error;
2034 strftime(str, freespace, "%Y%m%d", &ts);
2037 case 'G': /* request minute */
2038 if (!localtime_r(&when, &ts)) goto error;
2039 strftime(str, freespace, "%M", &ts);
2042 case 'H': /* request hour */
2043 if (!localtime_r(&when, &ts)) goto error;
2044 strftime(str, freespace, "%H", &ts);
2047 case 'I': /* Request ID */
2048 if (request->packet) {
2049 snprintf(str, freespace, "%i", request->packet->id);
2053 case 'S': /* request timestamp in SQL format*/
2054 if (!localtime_r(&when, &ts)) goto error;
2055 strftime(str, freespace, "%Y-%m-%d %H:%M:%S", &ts);
2058 case 'T': /* request timestamp */
2059 if (!localtime_r(&when, &ts)) goto error;
2060 strftime(str, freespace, "%Y-%m-%d-%H.%M.%S.000000", &ts);
2063 case 'Y': /* request year */
2064 if (!localtime_r(&when, &ts)) {
2066 REDEBUG("Failed converting packet timestamp to localtime: %s", fr_syserror(errno));
2070 strftime(str, freespace, "%Y", &ts);
2073 case 'v': /* Version of code */
2074 snprintf(str, freespace, "%s", radiusd_short_version);
2084 case XLAT_ATTRIBUTE:
2085 XLAT_DEBUG("xlat_aprint ATTRIBUTE");
2088 * Some attributes are virtual <sigh>
2090 str = xlat_getvp(ctx, request, &node->attr, escape ? false : true, true);
2092 XLAT_DEBUG("EXPAND attr %s", node->attr.tmpl_da->name);
2093 XLAT_DEBUG(" ---> %s", str);
2098 XLAT_DEBUG("xlat_aprint VIRTUAL");
2099 str = talloc_array(ctx, char, 2048); /* FIXME: have the module call talloc_typed_asprintf */
2100 rcode = node->xlat->func(node->xlat->instance, request, NULL, str, 2048);
2105 RDEBUG2("EXPAND %s", node->xlat->name);
2106 RDEBUG2(" --> %s", str);
2110 XLAT_DEBUG("xlat_aprint MODULE");
2111 if (xlat_process(&child, request, node->child, node->xlat->escape, node->xlat->instance) == 0) {
2115 XLAT_DEBUG("%.*sEXPAND mod %s %s", lvl, xlat_spaces, node->fmt, node->child->fmt);
2116 XLAT_DEBUG("%.*s ---> %s", lvl, xlat_spaces, child);
2121 * The OUTPUT of xlat is a printable string. The INPUT might not be...
2123 * This is really the reverse of fr_prints().
2125 if (cf_new_escape && *child) {
2130 type = PW_TYPE_STRING;
2131 slen = value_data_from_str(request, &data, &type, NULL, child, talloc_array_length(child) - 1, '"');
2132 rad_assert(slen > 0);
2142 if (*p == '\\') switch (p[1]) {
2164 str = talloc_array(ctx, char, 2048); /* FIXME: have the module call talloc_typed_asprintf */
2165 *str = '\0'; /* Be sure the string is NULL terminated, we now only free on error */
2167 rcode = node->xlat->func(node->xlat->instance, request, child, str, 2048);
2177 XLAT_DEBUG("xlat_aprint REGEX");
2178 if (regex_request_to_sub(ctx, &str, request, node->attr.tmpl_num) < 0) return NULL;
2183 case XLAT_ALTERNATE:
2184 XLAT_DEBUG("xlat_aprint ALTERNATE");
2185 rad_assert(node->child != NULL);
2186 rad_assert(node->alternate != NULL);
2188 str = xlat_aprint(ctx, request, node->child, escape, escape_ctx, lvl);
2191 str = xlat_aprint(ctx, request, node->alternate, escape, escape_ctx, lvl);
2197 * Escape the non-literals we found above.
2199 if (str && escape) {
2202 escaped = talloc_array(ctx, char, 2048); /* FIXME: do something intelligent */
2203 escape(request, escaped, 2038, str, escape_ctx);
2212 static size_t xlat_process(char **out, REQUEST *request, xlat_exp_t const * const head,
2213 RADIUS_ESCAPE_STRING escape, void *escape_ctx)
2217 char **array, *answer;
2218 xlat_exp_t const *node;
2223 * There are no nodes to process, so the result is a zero
2227 *out = talloc_zero_array(request, char, 1);
2232 * Hack for speed. If it's one expansion, just allocate
2233 * that and return, instead of allocating an intermediary
2238 * Pass the MAIN escape function. Recursive
2239 * calls will call node-specific escape
2242 answer = xlat_aprint(request, request, head, escape, escape_ctx, 0);
2244 *out = talloc_zero_array(request, char, 1);
2248 return strlen(answer);
2251 list = 0; /* FIXME: calculate this once */
2252 for (node = head; node != NULL; node = node->next) {
2256 array = talloc_array(request, char *, list);
2257 if (!array) return -1;
2259 for (node = head, i = 0; node != NULL; node = node->next, i++) {
2260 array[i] = xlat_aprint(array, request, node, escape, escape_ctx, 0); /* may be NULL */
2264 for (i = 0; i < list; i++) {
2265 if (array[i]) total += strlen(array[i]); /* FIXME: calculate strlen once */
2270 *out = talloc_zero_array(request, char, 1);
2274 answer = talloc_array(request, char, total + 1);
2277 for (i = 0; i < list; i++) {
2281 len = strlen(array[i]);
2282 memcpy(answer + total, array[i], len);
2286 answer[total] = '\0';
2287 talloc_free(array); /* and child entries */
2294 /** Replace %whatever in a string.
2296 * See 'doc/variables.txt' for more information.
2298 * @param[out] out Where to write pointer to output buffer.
2299 * @param[in] outlen Size of out.
2300 * @param[in] request current request.
2301 * @param[in] node the xlat structure to expand
2302 * @param[in] escape function to escape final value e.g. SQL quoting.
2303 * @param[in] escape_ctx pointer to pass to escape function.
2304 * @return length of string written @bug should really have -1 for failure
2306 static ssize_t xlat_expand_struct(char **out, size_t outlen, REQUEST *request, xlat_exp_t const *node,
2307 RADIUS_ESCAPE_STRING escape, void *escape_ctx)
2312 rad_assert(node != NULL);
2314 len = xlat_process(&buff, request, node, escape, escape_ctx);
2315 if ((len < 0) || !buff) {
2316 rad_assert(buff == NULL);
2317 if (*out) *out[0] = '\0';
2324 strlcpy(*out, buff, outlen);
2328 return strlen(*out);
2331 static ssize_t xlat_expand(char **out, size_t outlen, REQUEST *request, char const *fmt,
2332 RADIUS_ESCAPE_STRING escape, void *escape_ctx) CC_HINT(nonnull (1, 3, 4));
2334 /** Replace %whatever in a string.
2336 * See 'doc/variables.txt' for more information.
2338 * @param[out] out Where to write pointer to output buffer.
2339 * @param[in] outlen Size of out.
2340 * @param[in] request current request.
2341 * @param[in] fmt string to expand.
2342 * @param[in] escape function to escape final value e.g. SQL quoting.
2343 * @param[in] escape_ctx pointer to pass to escape function.
2344 * @return length of string written @bug should really have -1 for failure
2346 static ssize_t xlat_expand(char **out, size_t outlen, REQUEST *request, char const *fmt,
2347 RADIUS_ESCAPE_STRING escape, void *escape_ctx)
2353 * Give better errors than the old code.
2355 len = xlat_tokenize_request(request, fmt, &node);
2360 *out = talloc_zero_array(request, char, 1);
2366 if (*out) *out[0] = '\0';
2370 len = xlat_expand_struct(out, outlen, request, node, escape, escape_ctx);
2373 RDEBUG2("EXPAND %s", fmt);
2374 RDEBUG2(" --> %s", *out);
2379 /** Try to convert an xlat to a tmpl for efficiency
2381 * @param ctx to allocate new value_pair_tmpl_t in.
2382 * @param node to convert.
2383 * @return NULL if unable to convert (not necessarily error), or a new value_pair_tmpl_t.
2385 value_pair_tmpl_t *xlat_to_tmpl_attr(TALLOC_CTX *ctx, xlat_exp_t *node)
2387 value_pair_tmpl_t *vpt;
2389 if (node->next || (node->type != XLAT_ATTRIBUTE)) return NULL;
2392 * Concat means something completely different as an attribute reference
2393 * Count isn't implemented.
2395 if ((node->attr.tmpl_num == NUM_COUNT) || (node->attr.tmpl_num == NUM_ALL)) return NULL;
2397 vpt = tmpl_alloc(ctx, TMPL_TYPE_ATTR, node->fmt, -1);
2398 if (!vpt) return NULL;
2399 memcpy(&vpt->data, &node->attr.data, sizeof(vpt->data));
2406 /** Try to convert attr tmpl to an xlat for &attr[*] and artificially constructing expansions
2408 * @param ctx to allocate new xlat_expt_t in.
2409 * @param vpt to convert.
2410 * @return NULL if unable to convert (not necessarily error), or a new value_pair_tmpl_t.
2412 xlat_exp_t *xlat_from_tmpl_attr(TALLOC_CTX *ctx, value_pair_tmpl_t *vpt)
2416 if (vpt->type != TMPL_TYPE_ATTR) return NULL;
2418 node = talloc_zero(ctx, xlat_exp_t);
2419 node->fmt = talloc_memdup(node, vpt->name, vpt->len);
2420 tmpl_init(&node->attr, TMPL_TYPE_ATTR, node->fmt, talloc_array_length(node->fmt) - 1);
2421 memcpy(&node->attr.data, &vpt->data, sizeof(vpt->data));
2426 ssize_t radius_xlat(char *out, size_t outlen, REQUEST *request, char const *fmt, RADIUS_ESCAPE_STRING escape, void *ctx)
2428 return xlat_expand(&out, outlen, request, fmt, escape, ctx);
2431 ssize_t radius_axlat(char **out, REQUEST *request, char const *fmt, RADIUS_ESCAPE_STRING escape, void *ctx)
2433 return xlat_expand(out, 0, request, fmt, escape, ctx);
2436 ssize_t radius_axlat_struct(char **out, REQUEST *request, xlat_exp_t const *xlat, RADIUS_ESCAPE_STRING escape, void *ctx)
2438 return xlat_expand_struct(out, 0, request, xlat, escape, ctx);