/* $NetBSD: aclconf.c,v 1.3.4.2 2024/02/29 12:35:26 martin Exp $ */ /* * Copyright (C) Internet Systems Consortium, Inc. ("ISC") * * SPDX-License-Identifier: MPL-2.0 * * 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 https://mozilla.org/MPL/2.0/. * * See the COPYRIGHT file distributed with this work for additional * information regarding copyright ownership. */ #include #include #include #include #include #include /* Required for HP/UX (and others?) */ #include #include #include #include #include #include #include #define LOOP_MAGIC ISC_MAGIC('L', 'O', 'O', 'P') #if defined(HAVE_GEOIP2) static const char *geoip_dbnames[] = { "country", "city", "asnum", "isp", "domain", NULL, }; #endif /* if defined(HAVE_GEOIP2) */ isc_result_t cfg_aclconfctx_create(isc_mem_t *mctx, cfg_aclconfctx_t **ret) { cfg_aclconfctx_t *actx; REQUIRE(mctx != NULL); REQUIRE(ret != NULL && *ret == NULL); actx = isc_mem_get(mctx, sizeof(*actx)); isc_refcount_init(&actx->references, 1); actx->mctx = NULL; isc_mem_attach(mctx, &actx->mctx); ISC_LIST_INIT(actx->named_acl_cache); #if defined(HAVE_GEOIP2) actx->geoip = NULL; #endif /* if defined(HAVE_GEOIP2) */ *ret = actx; return (ISC_R_SUCCESS); } 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); *dest = src; } void cfg_aclconfctx_detach(cfg_aclconfctx_t **actxp) { REQUIRE(actxp != NULL && *actxp != NULL); cfg_aclconfctx_t *actx = *actxp; *actxp = NULL; if (isc_refcount_decrement(&actx->references) == 1) { dns_acl_t *dacl, *next; isc_refcount_destroy(&actx->references); 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)); } } /* * 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); 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); } dns_name_dup(dns_fixedname_name(&fixname), mctx, dnsname); return (ISC_R_SUCCESS); } /* * 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++; } #if defined(HAVE_GEOIP2) } else if (cfg_obj_istuple(ce) && cfg_obj_isvoid(cfg_tuple_get(ce, "negated"))) { n++; #endif /* HAVE_GEOIP2 */ } 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); } #if defined(HAVE_GEOIP2) 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, "country") == 0) { return (dns_geoip_country_code); } cfg_obj_log(obj, lctx, ISC_LOG_ERROR, "invalid database 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 database specified for " "country search: ignored"); return (subtype); case dns_geoip_continentcode: if (strcasecmp(dbname, "city") == 0) { return (dns_geoip_city_continentcode); } else if (strcasecmp(dbname, "country") == 0) { return (dns_geoip_country_continentcode); } cfg_obj_log(obj, lctx, ISC_LOG_ERROR, "invalid database specified for " "continent search: ignored"); return (subtype); case dns_geoip_continent: if (strcasecmp(dbname, "city") == 0) { return (dns_geoip_city_continent); } else if (strcasecmp(dbname, "country") == 0) { return (dns_geoip_country_continent); } cfg_obj_log(obj, lctx, ISC_LOG_ERROR, "invalid database specified for " "continent search: ignored"); return (subtype); case dns_geoip_region: if (strcasecmp(dbname, "city") == 0) { return (dns_geoip_city_region); } cfg_obj_log(obj, lctx, ISC_LOG_ERROR, "invalid database specified for " "region/subdivision search: ignored"); return (subtype); case dns_geoip_regionname: if (strcasecmp(dbname, "city") == 0) { return (dns_geoip_city_regionname); } cfg_obj_log(obj, lctx, ISC_LOG_ERROR, "invalid database specified for " "region/subdivision 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_timezonecode: if (strcasecmp(dbname, "city") != 0) { cfg_obj_log(obj, lctx, ISC_LOG_WARNING, "invalid database 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 database 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 database 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 database 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 database 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 database specified for " "a 'netspeed' search: ignoring"); } return (subtype); default: UNREACHABLE(); } } 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_countryname: case dns_geoip_continentcode: case dns_geoip_continent: if (ctx->geoip->country != NULL || ctx->geoip->city != NULL) { return (true); } break; case dns_geoip_country_code: case dns_geoip_country_name: case dns_geoip_country_continentcode: case dns_geoip_country_continent: if (ctx->geoip->country != NULL) { return (true); } /* city db can answer these too, so: */ FALLTHROUGH; case dns_geoip_region: case dns_geoip_regionname: case dns_geoip_city_countrycode: 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_continent: case dns_geoip_city_timezonecode: if (ctx->geoip->city != NULL) { return (true); } break; case dns_geoip_isp_name: if (ctx->geoip->isp != NULL) { return (true); } break; case dns_geoip_as_asnum: case dns_geoip_org_name: if (ctx->geoip->as != NULL) { return (true); } break; case dns_geoip_domain_name: if (ctx->geoip->domain != NULL) { return (true); } break; default: break; } 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 = NULL, *search = NULL; 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)) { int i; dbname = cfg_obj_asstring(ge); for (i = 0; geoip_dbnames[i] != NULL; i++) { if (strcasecmp(dbname, geoip_dbnames[i]) == 0) { break; } } if (geoip_dbnames[i] == NULL) { cfg_obj_log(obj, lctx, ISC_LOG_ERROR, "database '%s' is not defined for GeoIP2", dbname); return (ISC_R_UNEXPECTED); } } 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 */ cfg_obj_log(obj, lctx, ISC_LOG_ERROR, "three-letter country codes are unavailable " "in GeoIP2 databases"); return (ISC_R_FAILURE); } 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, "continent") == 0 && len == 2) { /* Two-letter continent code */ subtype = dns_geoip_continentcode; strlcpy(de.geoip_elem.as_string, search, sizeof(de.geoip_elem.as_string)); } else if (strcasecmp(stype, "continent") == 0) { subtype = dns_geoip_continent; strlcpy(de.geoip_elem.as_string, search, sizeof(de.geoip_elem.as_string)); } else if ((strcasecmp(stype, "region") == 0 || strcasecmp(stype, "subdivision") == 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 || strcasecmp(stype, "subdivision") == 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, "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, "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 { cfg_obj_log(obj, lctx, ISC_LOG_ERROR, "type '%s' is unavailable " "in GeoIP2 databases", stype); return (ISC_R_FAILURE); } 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 GeoIP2 database installed which can answer " "queries of type '%s'", stype); return (ISC_R_FAILURE); } *dep = de; return (ISC_R_SUCCESS); } #endif /* HAVE_GEOIP2 */ 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 *acl_data, 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; bool setpos; const cfg_obj_t *caml = NULL; const cfg_obj_t *obj_acl_tuple = NULL; const cfg_obj_t *obj_port = NULL, *obj_transport = NULL; bool is_tuple = false; if (nest_level != 0) { new_nest_level = nest_level - 1; } REQUIRE(ctx != NULL); REQUIRE(target != NULL); REQUIRE(*target == NULL || DNS_ACL_VALID(*target)); REQUIRE(acl_data != NULL); if (cfg_obj_islist(acl_data)) { caml = acl_data; } else { INSIST(cfg_obj_istuple(acl_data)); caml = cfg_tuple_get(acl_data, "aml"); INSIST(caml != NULL); obj_acl_tuple = cfg_tuple_get(acl_data, "port-transport"); INSIST(obj_acl_tuple != NULL); obj_port = cfg_tuple_get(obj_acl_tuple, "port"); obj_transport = cfg_tuple_get(obj_acl_tuple, "transport"); is_tuple = true; } 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); } } if (is_tuple) { uint16_t port = 0; uint32_t transports = 0; bool encrypted = false; if (obj_port != NULL && cfg_obj_isuint32(obj_port)) { port = (uint16_t)cfg_obj_asuint32(obj_port); } if (obj_transport != NULL && cfg_obj_isstring(obj_transport)) { if (strcasecmp(cfg_obj_asstring(obj_transport), "udp") == 0) { transports = isc_nm_udpsocket; encrypted = false; } else if (strcasecmp(cfg_obj_asstring(obj_transport), "tcp") == 0) { transports = isc_nm_tcpdnssocket; encrypted = false; } else if (strcasecmp(cfg_obj_asstring(obj_transport), "udp-tcp") == 0) { /* Good ol' DNS over port 53 */ transports = isc_nm_tcpdnssocket | isc_nm_udpsocket; encrypted = false; } else if (strcasecmp(cfg_obj_asstring(obj_transport), "tls") == 0) { transports = isc_nm_tlsdnssocket; encrypted = true; } else if (strcasecmp(cfg_obj_asstring(obj_transport), "http") == 0) { transports = isc_nm_httpsocket; encrypted = true; } else if (strcasecmp(cfg_obj_asstring(obj_transport), "http-plain") == 0) { transports = isc_nm_httpsocket; encrypted = false; } else { result = ISC_R_FAILURE; goto cleanup; } } if (port != 0 || transports != 0) { dns_acl_add_port_transports(dacl, port, transports, encrypted, false); } } 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; 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_ERROR, "'%s/%u': address/prefix length " "mismatch", buf, bitlen); goto cleanup; } /* * If nesting ACLs (nest_level != 0), we negate * the nestedacl element, not the iptable entry. */ setpos = (nest_level != 0 || !neg); result = dns_iptable_addprefix(iptab, &addr, bitlen, setpos); 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); } /* * Merge the port-transports entries from the * nested ACL into its parent. */ dns_acl_merge_ports_transports(dacl, inneracl, !neg); 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; } #if defined(HAVE_GEOIP2) } 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_GEOIP2 */ } 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. */ setpos = (nest_level != 0 || !neg); result = dns_iptable_addprefix(iptab, NULL, 0, setpos); 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;". */ setpos = (nest_level != 0 || neg); result = dns_iptable_addprefix(iptab, NULL, 0, setpos); 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); } dns_acl_node_count(dacl)++; de->node_num = dns_acl_node_count(dacl); 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); }