summaryrefslogtreecommitdiffstats
path: root/lib/isccfg/aclconf.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/isccfg/aclconf.c')
-rw-r--r--lib/isccfg/aclconf.c906
1 files changed, 906 insertions, 0 deletions
diff --git a/lib/isccfg/aclconf.c b/lib/isccfg/aclconf.c
new file mode 100644
index 0000000..3fa813e
--- /dev/null
+++ b/lib/isccfg/aclconf.c
@@ -0,0 +1,906 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+#include <config.h>
+
+#include <inttypes.h>
+#include <stdbool.h>
+
+#include <isc/mem.h>
+#include <isc/print.h>
+#include <isc/string.h> /* Required for HP/UX (and others?) */
+#include <isc/util.h>
+
+#include <isccfg/namedconf.h>
+#include <isccfg/aclconf.h>
+
+#include <dns/acl.h>
+#include <dns/iptable.h>
+#include <dns/fixedname.h>
+#include <dns/log.h>
+
+#ifdef HAVE_GEOIP
+#include <stdlib.h>
+#include <math.h>
+#endif /* HAVE_GEOIP */
+
+#define LOOP_MAGIC ISC_MAGIC('L','O','O','P')
+
+isc_result_t
+cfg_aclconfctx_create(isc_mem_t *mctx, cfg_aclconfctx_t **ret) {
+ isc_result_t result;
+ cfg_aclconfctx_t *actx;
+
+ REQUIRE(mctx != NULL);
+ REQUIRE(ret != NULL && *ret == NULL);
+
+ actx = isc_mem_get(mctx, sizeof(*actx));
+ if (actx == NULL)
+ return (ISC_R_NOMEMORY);
+
+ result = isc_refcount_init(&actx->references, 1);
+ if (result != ISC_R_SUCCESS)
+ goto cleanup;
+
+ actx->mctx = NULL;
+ isc_mem_attach(mctx, &actx->mctx);
+ ISC_LIST_INIT(actx->named_acl_cache);
+
+#ifdef HAVE_GEOIP
+ actx->geoip = NULL;
+#endif
+
+ *ret = actx;
+ return (ISC_R_SUCCESS);
+
+ cleanup:
+ isc_mem_put(mctx, actx, sizeof(*actx));
+ return (result);
+}
+
+void
+cfg_aclconfctx_attach(cfg_aclconfctx_t *src, cfg_aclconfctx_t **dest) {
+ REQUIRE(src != NULL);
+ REQUIRE(dest != NULL && *dest == NULL);
+
+ isc_refcount_increment(&src->references, NULL);
+ *dest = src;
+}
+
+void
+cfg_aclconfctx_detach(cfg_aclconfctx_t **actxp) {
+ cfg_aclconfctx_t *actx;
+ dns_acl_t *dacl, *next;
+ unsigned int refs;
+
+ REQUIRE(actxp != NULL && *actxp != NULL);
+
+ actx = *actxp;
+
+ isc_refcount_decrement(&actx->references, &refs);
+ if (refs == 0) {
+ for (dacl = ISC_LIST_HEAD(actx->named_acl_cache);
+ dacl != NULL;
+ dacl = next)
+ {
+ next = ISC_LIST_NEXT(dacl, nextincache);
+ ISC_LIST_UNLINK(actx->named_acl_cache, dacl,
+ nextincache);
+ dns_acl_detach(&dacl);
+ }
+ isc_mem_putanddetach(&actx->mctx, actx, sizeof(*actx));
+ }
+
+ *actxp = NULL;
+}
+
+/*
+ * Find the definition of the named acl whose name is "name".
+ */
+static isc_result_t
+get_acl_def(const cfg_obj_t *cctx, const char *name, const cfg_obj_t **ret) {
+ isc_result_t result;
+ const cfg_obj_t *acls = NULL;
+ const cfg_listelt_t *elt;
+
+ result = cfg_map_get(cctx, "acl", &acls);
+ if (result != ISC_R_SUCCESS)
+ return (result);
+ for (elt = cfg_list_first(acls);
+ elt != NULL;
+ elt = cfg_list_next(elt)) {
+ const cfg_obj_t *acl = cfg_listelt_value(elt);
+ const char *aclname = cfg_obj_asstring(cfg_tuple_get(acl, "name"));
+ if (strcasecmp(aclname, name) == 0) {
+ if (ret != NULL) {
+ *ret = cfg_tuple_get(acl, "value");
+ }
+ return (ISC_R_SUCCESS);
+ }
+ }
+ return (ISC_R_NOTFOUND);
+}
+
+static isc_result_t
+convert_named_acl(const cfg_obj_t *nameobj, const cfg_obj_t *cctx,
+ isc_log_t *lctx, cfg_aclconfctx_t *ctx,
+ isc_mem_t *mctx, unsigned int nest_level,
+ dns_acl_t **target)
+{
+ isc_result_t result;
+ const cfg_obj_t *cacl = NULL;
+ dns_acl_t *dacl;
+ dns_acl_t loop;
+ const char *aclname = cfg_obj_asstring(nameobj);
+
+ /* Look for an already-converted version. */
+ for (dacl = ISC_LIST_HEAD(ctx->named_acl_cache);
+ dacl != NULL;
+ dacl = ISC_LIST_NEXT(dacl, nextincache))
+ {
+ if (strcasecmp(aclname, dacl->name) == 0) {
+ if (ISC_MAGIC_VALID(dacl, LOOP_MAGIC)) {
+ cfg_obj_log(nameobj, lctx, ISC_LOG_ERROR,
+ "acl loop detected: %s", aclname);
+ return (ISC_R_FAILURE);
+ }
+ dns_acl_attach(dacl, target);
+ return (ISC_R_SUCCESS);
+ }
+ }
+ /* Not yet converted. Convert now. */
+ result = get_acl_def(cctx, aclname, &cacl);
+ if (result != ISC_R_SUCCESS) {
+ cfg_obj_log(nameobj, lctx, ISC_LOG_WARNING,
+ "undefined ACL '%s'", aclname);
+ return (result);
+ }
+ /*
+ * Add a loop detection element.
+ */
+ memset(&loop, 0, sizeof(loop));
+ ISC_LINK_INIT(&loop, nextincache);
+ DE_CONST(aclname, loop.name);
+ loop.magic = LOOP_MAGIC;
+ ISC_LIST_APPEND(ctx->named_acl_cache, &loop, nextincache);
+ result = cfg_acl_fromconfig(cacl, cctx, lctx, ctx, mctx,
+ nest_level, &dacl);
+ ISC_LIST_UNLINK(ctx->named_acl_cache, &loop, nextincache);
+ loop.magic = 0;
+ loop.name = NULL;
+ if (result != ISC_R_SUCCESS)
+ return (result);
+ dacl->name = isc_mem_strdup(dacl->mctx, aclname);
+ if (dacl->name == NULL)
+ return (ISC_R_NOMEMORY);
+ ISC_LIST_APPEND(ctx->named_acl_cache, dacl, nextincache);
+ dns_acl_attach(dacl, target);
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+convert_keyname(const cfg_obj_t *keyobj, isc_log_t *lctx, isc_mem_t *mctx,
+ dns_name_t *dnsname)
+{
+ isc_result_t result;
+ isc_buffer_t buf;
+ dns_fixedname_t fixname;
+ unsigned int keylen;
+ const char *txtname = cfg_obj_asstring(keyobj);
+
+ keylen = strlen(txtname);
+ isc_buffer_constinit(&buf, txtname, keylen);
+ isc_buffer_add(&buf, keylen);
+ dns_fixedname_init(&fixname);
+ result = dns_name_fromtext(dns_fixedname_name(&fixname), &buf,
+ dns_rootname, 0, NULL);
+ if (result != ISC_R_SUCCESS) {
+ cfg_obj_log(keyobj, lctx, ISC_LOG_WARNING,
+ "key name '%s' is not a valid domain name",
+ txtname);
+ return (result);
+ }
+ return (dns_name_dup(dns_fixedname_name(&fixname), mctx, dnsname));
+}
+
+/*
+ * Recursively pre-parse an ACL definition to find the total number
+ * of non-IP-prefix elements (localhost, localnets, key) in all nested
+ * ACLs, so that the parent will have enough space allocated for the
+ * elements table after all the nested ACLs have been merged in to the
+ * parent.
+ */
+static isc_result_t
+count_acl_elements(const cfg_obj_t *caml, const cfg_obj_t *cctx,
+ isc_log_t *lctx, cfg_aclconfctx_t *ctx, isc_mem_t *mctx,
+ uint32_t *count, bool *has_negative)
+{
+ const cfg_listelt_t *elt;
+ isc_result_t result;
+ uint32_t n = 0;
+
+ REQUIRE(count != NULL);
+
+ if (has_negative != NULL)
+ *has_negative = false;
+
+ for (elt = cfg_list_first(caml);
+ elt != NULL;
+ elt = cfg_list_next(elt)) {
+ const cfg_obj_t *ce = cfg_listelt_value(elt);
+
+ /* might be a negated element, in which case get the value. */
+ if (cfg_obj_istuple(ce)) {
+ const cfg_obj_t *negated =
+ cfg_tuple_get(ce, "negated");
+ if (! cfg_obj_isvoid(negated)) {
+ ce = negated;
+ if (has_negative != NULL)
+ *has_negative = true;
+ }
+ }
+
+ if (cfg_obj_istype(ce, &cfg_type_keyref)) {
+ n++;
+ } else if (cfg_obj_islist(ce)) {
+ bool negative;
+ uint32_t sub;
+ result = count_acl_elements(ce, cctx, lctx, ctx, mctx,
+ &sub, &negative);
+ if (result != ISC_R_SUCCESS)
+ return (result);
+ n += sub;
+ if (negative)
+ n++;
+#ifdef HAVE_GEOIP
+ } else if (cfg_obj_istuple(ce) &&
+ cfg_obj_isvoid(cfg_tuple_get(ce, "negated")))
+ {
+ n++;
+#endif /* HAVE_GEOIP */
+ } else if (cfg_obj_isstring(ce)) {
+ const char *name = cfg_obj_asstring(ce);
+ if (strcasecmp(name, "localhost") == 0 ||
+ strcasecmp(name, "localnets") == 0 ||
+ strcasecmp(name, "none") == 0)
+ {
+ n++;
+ } else if (strcasecmp(name, "any") != 0) {
+ dns_acl_t *inneracl = NULL;
+ /*
+ * Convert any named acls we reference now if
+ * they have not already been converted.
+ */
+ result = convert_named_acl(ce, cctx, lctx, ctx,
+ mctx, 0, &inneracl);
+ if (result == ISC_R_SUCCESS) {
+ if (inneracl->has_negatives)
+ n++;
+ else
+ n += inneracl->length;
+ dns_acl_detach(&inneracl);
+ } else
+ return (result);
+ }
+ }
+ }
+
+ *count = n;
+ return (ISC_R_SUCCESS);
+}
+
+#ifdef HAVE_GEOIP
+static dns_geoip_subtype_t
+get_subtype(const cfg_obj_t *obj, isc_log_t *lctx,
+ dns_geoip_subtype_t subtype, const char *dbname)
+{
+ if (dbname == NULL)
+ return (subtype);
+
+ switch (subtype) {
+ case dns_geoip_countrycode:
+ if (strcasecmp(dbname, "city") == 0)
+ return (dns_geoip_city_countrycode);
+ else if (strcasecmp(dbname, "region") == 0)
+ return (dns_geoip_region_countrycode);
+ else if (strcasecmp(dbname, "country") == 0)
+ return (dns_geoip_country_code);
+ cfg_obj_log(obj, lctx, ISC_LOG_ERROR,
+ "invalid GeoIP DB specified for "
+ "country search: ignored");
+ return (subtype);
+ case dns_geoip_countrycode3:
+ if (strcasecmp(dbname, "city") == 0)
+ return (dns_geoip_city_countrycode3);
+ else if (strcasecmp(dbname, "country") == 0)
+ return (dns_geoip_country_code3);
+ cfg_obj_log(obj, lctx, ISC_LOG_ERROR,
+ "invalid GeoIP DB specified for "
+ "country search: ignored");
+ return (subtype);
+ case dns_geoip_countryname:
+ if (strcasecmp(dbname, "city") == 0)
+ return (dns_geoip_city_countryname);
+ else if (strcasecmp(dbname, "country") == 0)
+ return (dns_geoip_country_name);
+ cfg_obj_log(obj, lctx, ISC_LOG_ERROR,
+ "invalid GeoIP DB specified for "
+ "country search: ignored");
+ return (subtype);
+ case dns_geoip_region:
+ if (strcasecmp(dbname, "city") == 0)
+ return (dns_geoip_city_region);
+ else if (strcasecmp(dbname, "region") == 0)
+ return (dns_geoip_region_code);
+ cfg_obj_log(obj, lctx, ISC_LOG_ERROR,
+ "invalid GeoIP DB specified for "
+ "region search: ignored");
+ return (subtype);
+ case dns_geoip_regionname:
+ if (strcasecmp(dbname, "city") == 0)
+ return (dns_geoip_city_region);
+ else if (strcasecmp(dbname, "region") == 0)
+ return (dns_geoip_region_name);
+ cfg_obj_log(obj, lctx, ISC_LOG_ERROR,
+ "invalid GeoIP DB specified for "
+ "region search: ignored");
+ return (subtype);
+
+ /*
+ * Log a warning if the wrong database was specified
+ * on an unambiguous query
+ */
+ case dns_geoip_city_name:
+ case dns_geoip_city_postalcode:
+ case dns_geoip_city_metrocode:
+ case dns_geoip_city_areacode:
+ case dns_geoip_city_continentcode:
+ case dns_geoip_city_timezonecode:
+ if (strcasecmp(dbname, "city") != 0)
+ cfg_obj_log(obj, lctx, ISC_LOG_WARNING,
+ "invalid GeoIP DB specified for "
+ "a 'city'-only search type: ignoring");
+ return (subtype);
+ case dns_geoip_isp_name:
+ if (strcasecmp(dbname, "isp") != 0)
+ cfg_obj_log(obj, lctx, ISC_LOG_WARNING,
+ "invalid GeoIP DB specified for "
+ "an 'isp' search: ignoring");
+ return (subtype);
+ case dns_geoip_org_name:
+ if (strcasecmp(dbname, "org") != 0)
+ cfg_obj_log(obj, lctx, ISC_LOG_WARNING,
+ "invalid GeoIP DB specified for "
+ "an 'org' search: ignoring");
+ return (subtype);
+ case dns_geoip_as_asnum:
+ if (strcasecmp(dbname, "asnum") != 0)
+ cfg_obj_log(obj, lctx, ISC_LOG_WARNING,
+ "invalid GeoIP DB specified for "
+ "an 'asnum' search: ignoring");
+ return (subtype);
+ case dns_geoip_domain_name:
+ if (strcasecmp(dbname, "domain") != 0)
+ cfg_obj_log(obj, lctx, ISC_LOG_WARNING,
+ "invalid GeoIP DB specified for "
+ "a 'domain' search: ignoring");
+ return (subtype);
+ case dns_geoip_netspeed_id:
+ if (strcasecmp(dbname, "netspeed") != 0)
+ cfg_obj_log(obj, lctx, ISC_LOG_WARNING,
+ "invalid GeoIP DB specified for "
+ "a 'netspeed' search: ignoring");
+ return (subtype);
+ default:
+ INSIST(0);
+ }
+}
+
+static bool
+geoip_can_answer(dns_aclelement_t *elt, cfg_aclconfctx_t *ctx) {
+ if (ctx->geoip == NULL)
+ return (true);
+
+ switch (elt->geoip_elem.subtype) {
+ case dns_geoip_countrycode:
+ case dns_geoip_countrycode3:
+ case dns_geoip_countryname:
+ if (ctx->geoip->city_v4 != NULL ||
+ ctx->geoip->city_v6 != NULL ||
+ ctx->geoip->country_v4 != NULL ||
+ ctx->geoip->country_v6 != NULL ||
+ ctx->geoip->region != NULL)
+ return (true);
+ /* FALLTHROUGH */
+ case dns_geoip_region:
+ case dns_geoip_regionname:
+ if (ctx->geoip->city_v4 != NULL ||
+ ctx->geoip->city_v6 != NULL ||
+ ctx->geoip->region != NULL)
+ return (true);
+ /* FALLTHROUGH */
+ case dns_geoip_country_code:
+ case dns_geoip_country_code3:
+ case dns_geoip_country_name:
+ if (ctx->geoip->country_v4 != NULL ||
+ ctx->geoip->country_v6 != NULL)
+ return (true);
+ /* FALLTHROUGH */
+ case dns_geoip_region_countrycode:
+ case dns_geoip_region_code:
+ case dns_geoip_region_name:
+ if (ctx->geoip->region != NULL)
+ return (true);
+ /* FALLTHROUGH */
+ case dns_geoip_city_countrycode:
+ case dns_geoip_city_countrycode3:
+ case dns_geoip_city_countryname:
+ case dns_geoip_city_region:
+ case dns_geoip_city_regionname:
+ case dns_geoip_city_name:
+ case dns_geoip_city_postalcode:
+ case dns_geoip_city_metrocode:
+ case dns_geoip_city_areacode:
+ case dns_geoip_city_continentcode:
+ case dns_geoip_city_timezonecode:
+ if (ctx->geoip->city_v4 != NULL ||
+ ctx->geoip->city_v6 != NULL)
+ return (true);
+ /* FALLTHROUGH */
+ case dns_geoip_isp_name:
+ if (ctx->geoip->isp != NULL)
+ return (true);
+ /* FALLTHROUGH */
+ case dns_geoip_org_name:
+ if (ctx->geoip->org != NULL)
+ return (true);
+ /* FALLTHROUGH */
+ case dns_geoip_as_asnum:
+ if (ctx->geoip->as != NULL)
+ return (true);
+ /* FALLTHROUGH */
+ case dns_geoip_domain_name:
+ if (ctx->geoip->domain != NULL)
+ return (true);
+ /* FALLTHROUGH */
+ case dns_geoip_netspeed_id:
+ if (ctx->geoip->netspeed != NULL)
+ return (true);
+ }
+
+ return (false);
+}
+
+static isc_result_t
+parse_geoip_element(const cfg_obj_t *obj, isc_log_t *lctx,
+ cfg_aclconfctx_t *ctx, dns_aclelement_t *dep)
+{
+ const cfg_obj_t *ge;
+ const char *dbname = NULL;
+ const char *stype, *search;
+ dns_geoip_subtype_t subtype;
+ dns_aclelement_t de;
+ size_t len;
+
+ REQUIRE(dep != NULL);
+
+ de = *dep;
+
+ ge = cfg_tuple_get(obj, "db");
+ if (!cfg_obj_isvoid(ge))
+ dbname = cfg_obj_asstring(ge);
+
+ stype = cfg_obj_asstring(cfg_tuple_get(obj, "subtype"));
+ search = cfg_obj_asstring(cfg_tuple_get(obj, "search"));
+ len = strlen(search);
+
+ if (len == 0) {
+ cfg_obj_log(obj, lctx, ISC_LOG_ERROR,
+ "zero-length geoip search field");
+ return (ISC_R_FAILURE);
+ }
+
+ if (strcasecmp(stype, "country") == 0 && len == 2) {
+ /* Two-letter country code */
+ subtype = dns_geoip_countrycode;
+ strlcpy(de.geoip_elem.as_string, search,
+ sizeof(de.geoip_elem.as_string));
+ } else if (strcasecmp(stype, "country") == 0 && len == 3) {
+ /* Three-letter country code */
+ subtype = dns_geoip_countrycode3;
+ strlcpy(de.geoip_elem.as_string, search,
+ sizeof(de.geoip_elem.as_string));
+ } else if (strcasecmp(stype, "country") == 0) {
+ /* Country name */
+ subtype = dns_geoip_countryname;
+ strlcpy(de.geoip_elem.as_string, search,
+ sizeof(de.geoip_elem.as_string));
+ } else if (strcasecmp(stype, "region") == 0 && len == 2) {
+ /* Two-letter region code */
+ subtype = dns_geoip_region;
+ strlcpy(de.geoip_elem.as_string, search,
+ sizeof(de.geoip_elem.as_string));
+ } else if (strcasecmp(stype, "region") == 0) {
+ /* Region name */
+ subtype = dns_geoip_regionname;
+ strlcpy(de.geoip_elem.as_string, search,
+ sizeof(de.geoip_elem.as_string));
+ } else if (strcasecmp(stype, "city") == 0) {
+ /* City name */
+ subtype = dns_geoip_city_name;
+ strlcpy(de.geoip_elem.as_string, search,
+ sizeof(de.geoip_elem.as_string));
+ } else if (strcasecmp(stype, "postal") == 0 ||
+ strcasecmp(stype, "postalcode") == 0)
+ {
+ if (len < 7) {
+ subtype = dns_geoip_city_postalcode;
+ strlcpy(de.geoip_elem.as_string, search,
+ sizeof(de.geoip_elem.as_string));
+ } else {
+ cfg_obj_log(obj, lctx, ISC_LOG_ERROR,
+ "geoiop postal code (%s) too long",
+ search);
+ return (ISC_R_FAILURE);
+ }
+ } else if (strcasecmp(stype, "metro") == 0 ||
+ strcasecmp(stype, "metrocode") == 0)
+ {
+ subtype = dns_geoip_city_metrocode;
+ de.geoip_elem.as_int = atoi(search);
+ } else if (strcasecmp(stype, "area") == 0 ||
+ strcasecmp(stype, "areacode") == 0)
+ {
+ subtype = dns_geoip_city_areacode;
+ de.geoip_elem.as_int = atoi(search);
+ } else if (strcasecmp(stype, "tz") == 0 ||
+ strcasecmp(stype, "timezone") == 0)
+ {
+ subtype = dns_geoip_city_timezonecode;
+ strlcpy(de.geoip_elem.as_string, search,
+ sizeof(de.geoip_elem.as_string));
+ } else if (strcasecmp(stype, "continent") == 0 && len == 2) {
+ /* Two-letter continent code */
+ subtype = dns_geoip_city_continentcode;
+ strlcpy(de.geoip_elem.as_string, search,
+ sizeof(de.geoip_elem.as_string));
+ } else if (strcasecmp(stype, "continent") == 0) {
+ cfg_obj_log(obj, lctx, ISC_LOG_ERROR,
+ "geoiop continent code (%s) too long", search);
+ return (ISC_R_FAILURE);
+ } else if (strcasecmp(stype, "isp") == 0) {
+ subtype = dns_geoip_isp_name;
+ strlcpy(de.geoip_elem.as_string, search,
+ sizeof(de.geoip_elem.as_string));
+ } else if (strcasecmp(stype, "asnum") == 0) {
+ subtype = dns_geoip_as_asnum;
+ strlcpy(de.geoip_elem.as_string, search,
+ sizeof(de.geoip_elem.as_string));
+ } else if (strcasecmp(stype, "org") == 0) {
+ subtype = dns_geoip_org_name;
+ strlcpy(de.geoip_elem.as_string, search,
+ sizeof(de.geoip_elem.as_string));
+ } else if (strcasecmp(stype, "domain") == 0) {
+ subtype = dns_geoip_domain_name;
+ strlcpy(de.geoip_elem.as_string, search,
+ sizeof(de.geoip_elem.as_string));
+ } else if (strcasecmp(stype, "netspeed") == 0) {
+ subtype = dns_geoip_netspeed_id;
+ de.geoip_elem.as_int = atoi(search);
+ } else
+ INSIST(0);
+
+ de.geoip_elem.subtype = get_subtype(obj, lctx, subtype, dbname);
+
+ if (! geoip_can_answer(&de, ctx)) {
+ cfg_obj_log(obj, lctx, ISC_LOG_ERROR,
+ "no GeoIP database installed which can answer "
+ "queries of type '%s'", stype);
+ return (ISC_R_FAILURE);
+ }
+
+ *dep = de;
+
+ return (ISC_R_SUCCESS);
+}
+#endif
+
+isc_result_t
+cfg_acl_fromconfig(const cfg_obj_t *caml, const cfg_obj_t *cctx,
+ isc_log_t *lctx, cfg_aclconfctx_t *ctx,
+ isc_mem_t *mctx, unsigned int nest_level,
+ dns_acl_t **target)
+{
+ return (cfg_acl_fromconfig2(caml, cctx, lctx, ctx, mctx,
+ nest_level, 0, target));
+}
+
+isc_result_t
+cfg_acl_fromconfig2(const cfg_obj_t *caml, const cfg_obj_t *cctx,
+ isc_log_t *lctx, cfg_aclconfctx_t *ctx,
+ isc_mem_t *mctx, unsigned int nest_level,
+ uint16_t family, dns_acl_t **target)
+{
+ isc_result_t result;
+ dns_acl_t *dacl = NULL, *inneracl = NULL;
+ dns_aclelement_t *de;
+ const cfg_listelt_t *elt;
+ dns_iptable_t *iptab;
+ int new_nest_level = 0;
+
+ if (nest_level != 0)
+ new_nest_level = nest_level - 1;
+
+ REQUIRE(target != NULL);
+ REQUIRE(*target == NULL || DNS_ACL_VALID(*target));
+
+ if (*target != NULL) {
+ /*
+ * If target already points to an ACL, then we're being
+ * called recursively to configure a nested ACL. The
+ * nested ACL's contents should just be absorbed into its
+ * parent ACL.
+ */
+ dns_acl_attach(*target, &dacl);
+ dns_acl_detach(target);
+ } else {
+ /*
+ * Need to allocate a new ACL structure. Count the items
+ * in the ACL definition that will require space in the
+ * elements table. (Note that if nest_level is nonzero,
+ * *everything* goes in the elements table.)
+ */
+ uint32_t nelem;
+
+ if (nest_level == 0) {
+ result = count_acl_elements(caml, cctx, lctx, ctx,
+ mctx, &nelem, NULL);
+ if (result != ISC_R_SUCCESS)
+ return (result);
+ } else
+ nelem = cfg_list_length(caml, false);
+
+ result = dns_acl_create(mctx, nelem, &dacl);
+ if (result != ISC_R_SUCCESS)
+ return (result);
+ }
+
+ de = dacl->elements;
+ for (elt = cfg_list_first(caml);
+ elt != NULL;
+ elt = cfg_list_next(elt)) {
+ const cfg_obj_t *ce = cfg_listelt_value(elt);
+ bool neg = false;
+
+ INSIST(dacl->length <= dacl->alloc);
+
+ if (cfg_obj_istuple(ce)) {
+ /* Might be a negated element */
+ const cfg_obj_t *negated =
+ cfg_tuple_get(ce, "negated");
+ if (! cfg_obj_isvoid(negated)) {
+ neg = true;
+ dacl->has_negatives = true;
+ ce = negated;
+ }
+ }
+
+ /*
+ * If nest_level is nonzero, then every element is
+ * to be stored as a separate, nested ACL rather than
+ * merged into the main iptable.
+ */
+ iptab = dacl->iptable;
+
+ if (nest_level != 0) {
+ result = dns_acl_create(mctx,
+ cfg_list_length(ce, false),
+ &de->nestedacl);
+ if (result != ISC_R_SUCCESS)
+ goto cleanup;
+ iptab = de->nestedacl->iptable;
+ }
+
+ if (cfg_obj_isnetprefix(ce)) {
+ /* Network prefix */
+ isc_netaddr_t addr;
+ unsigned int bitlen;
+ bool setpos, setecs;
+
+ cfg_obj_asnetprefix(ce, &addr, &bitlen);
+ if (family != 0 && family != addr.family) {
+ char buf[ISC_NETADDR_FORMATSIZE + 1];
+ isc_netaddr_format(&addr, buf, sizeof(buf));
+ cfg_obj_log(ce, lctx, ISC_LOG_WARNING,
+ "'%s': incorrect address family; "
+ "ignoring", buf);
+ if (nest_level != 0)
+ dns_acl_detach(&de->nestedacl);
+ continue;
+ }
+ result = isc_netaddr_prefixok(&addr, bitlen);
+ if (result != ISC_R_SUCCESS) {
+ char buf[ISC_NETADDR_FORMATSIZE + 1];
+ isc_netaddr_format(&addr, buf, sizeof(buf));
+ cfg_obj_log(ce, lctx, ISC_LOG_WARNING,
+ "'%s/%u': address/prefix length "
+ "mismatch", buf, bitlen);
+ }
+
+ /*
+ * If nesting ACLs (nest_level != 0), we negate
+ * the nestedacl element, not the iptable entry.
+ */
+ setpos = (nest_level != 0 || !neg);
+ setecs = cfg_obj_istype(ce, &cfg_type_ecsprefix);
+ result = dns_iptable_addprefix2(iptab, &addr, bitlen,
+ setpos, setecs);
+ if (result != ISC_R_SUCCESS)
+ goto cleanup;
+
+ if (nest_level > 0) {
+ INSIST(dacl->length < dacl->alloc);
+ de->type = dns_aclelementtype_nestedacl;
+ de->negative = neg;
+ } else
+ continue;
+ } else if (cfg_obj_islist(ce)) {
+ /*
+ * If we're nesting ACLs, put the nested
+ * ACL onto the elements list; otherwise
+ * merge it into *this* ACL. We nest ACLs
+ * in two cases: 1) sortlist, 2) if the
+ * nested ACL contains negated members.
+ */
+ if (inneracl != NULL)
+ dns_acl_detach(&inneracl);
+ result = cfg_acl_fromconfig(ce, cctx, lctx,
+ ctx, mctx, new_nest_level,
+ &inneracl);
+ if (result != ISC_R_SUCCESS)
+ goto cleanup;
+nested_acl:
+ if (nest_level > 0 || inneracl->has_negatives) {
+ INSIST(dacl->length < dacl->alloc);
+ de->type = dns_aclelementtype_nestedacl;
+ de->negative = neg;
+ if (de->nestedacl != NULL)
+ dns_acl_detach(&de->nestedacl);
+ dns_acl_attach(inneracl,
+ &de->nestedacl);
+ dns_acl_detach(&inneracl);
+ /* Fall through. */
+ } else {
+ INSIST(dacl->length + inneracl->length
+ <= dacl->alloc);
+ dns_acl_merge(dacl, inneracl,
+ !neg);
+ de += inneracl->length; /* elements added */
+ dns_acl_detach(&inneracl);
+ INSIST(dacl->length <= dacl->alloc);
+ continue;
+ }
+ } else if (cfg_obj_istype(ce, &cfg_type_keyref)) {
+ /* Key name. */
+ INSIST(dacl->length < dacl->alloc);
+ de->type = dns_aclelementtype_keyname;
+ de->negative = neg;
+ dns_name_init(&de->keyname, NULL);
+ result = convert_keyname(ce, lctx, mctx,
+ &de->keyname);
+ if (result != ISC_R_SUCCESS)
+ goto cleanup;
+#ifdef HAVE_GEOIP
+ } else if (cfg_obj_istuple(ce) &&
+ cfg_obj_isvoid(cfg_tuple_get(ce, "negated")))
+ {
+ INSIST(dacl->length < dacl->alloc);
+ result = parse_geoip_element(ce, lctx, ctx, de);
+ if (result != ISC_R_SUCCESS)
+ goto cleanup;
+ de->type = dns_aclelementtype_geoip;
+ de->negative = neg;
+#endif /* HAVE_GEOIP */
+ } else if (cfg_obj_isstring(ce)) {
+ /* ACL name. */
+ const char *name = cfg_obj_asstring(ce);
+ if (strcasecmp(name, "any") == 0) {
+ /* Iptable entry with zero bit length. */
+ result = dns_iptable_addprefix(iptab, NULL, 0,
+ (nest_level != 0 || !neg));
+ if (result != ISC_R_SUCCESS)
+ goto cleanup;
+
+ if (nest_level != 0) {
+ INSIST(dacl->length < dacl->alloc);
+ de->type = dns_aclelementtype_nestedacl;
+ de->negative = neg;
+ } else
+ continue;
+ } else if (strcasecmp(name, "none") == 0) {
+ /* none == !any */
+ /*
+ * We don't unconditional set
+ * dacl->has_negatives and
+ * de->negative to true so we can handle
+ * "!none;".
+ */
+ result = dns_iptable_addprefix(iptab, NULL, 0,
+ (nest_level != 0 || neg));
+ if (result != ISC_R_SUCCESS)
+ goto cleanup;
+
+ if (!neg)
+ dacl->has_negatives = !neg;
+
+ if (nest_level != 0) {
+ INSIST(dacl->length < dacl->alloc);
+ de->type = dns_aclelementtype_nestedacl;
+ de->negative = !neg;
+ } else
+ continue;
+ } else if (strcasecmp(name, "localhost") == 0) {
+ INSIST(dacl->length < dacl->alloc);
+ de->type = dns_aclelementtype_localhost;
+ de->negative = neg;
+ } else if (strcasecmp(name, "localnets") == 0) {
+ INSIST(dacl->length < dacl->alloc);
+ de->type = dns_aclelementtype_localnets;
+ de->negative = neg;
+ } else {
+ if (inneracl != NULL)
+ dns_acl_detach(&inneracl);
+ /*
+ * This call should just find the cached
+ * of the named acl.
+ */
+ result = convert_named_acl(ce, cctx, lctx, ctx,
+ mctx, new_nest_level,
+ &inneracl);
+ if (result != ISC_R_SUCCESS)
+ goto cleanup;
+
+ goto nested_acl;
+ }
+ } else {
+ cfg_obj_log(ce, lctx, ISC_LOG_WARNING,
+ "address match list contains "
+ "unsupported element type");
+ result = ISC_R_FAILURE;
+ goto cleanup;
+ }
+
+ /*
+ * This should only be reached for localhost, localnets
+ * and keyname elements, and nested ACLs if nest_level is
+ * nonzero (i.e., in sortlists).
+ */
+ if (de->nestedacl != NULL &&
+ de->type != dns_aclelementtype_nestedacl)
+ dns_acl_detach(&de->nestedacl);
+
+ dacl->node_count++;
+ de->node_num = dacl->node_count;
+
+ dacl->length++;
+ de++;
+ INSIST(dacl->length <= dacl->alloc);
+ }
+
+ dns_acl_attach(dacl, target);
+ result = ISC_R_SUCCESS;
+
+ cleanup:
+ if (inneracl != NULL)
+ dns_acl_detach(&inneracl);
+ dns_acl_detach(&dacl);
+ return (result);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-01 20:04:15 +0000