/* * Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC") * Copyright (C) 1999-2001 Internet Software Consortium. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR * PERFORMANCE OF THIS SOFTWARE. */ /* $Id: aclconf.c,v 1.27.2.1 2004/03/09 06:09:17 marka Exp $ */ #include #include #include /* Required for HP/UX (and others?) */ #include #include #include #include #include void ns_aclconfctx_init(ns_aclconfctx_t *ctx) { ISC_LIST_INIT(ctx->named_acl_cache); } void ns_aclconfctx_destroy(ns_aclconfctx_t *ctx) { dns_acl_t *dacl, *next; for (dacl = ISC_LIST_HEAD(ctx->named_acl_cache); dacl != NULL; dacl = next) { next = ISC_LIST_NEXT(dacl, nextincache); dns_acl_detach(&dacl); } } /* * Find the definition of the named acl whose name is "name". */ static isc_result_t get_acl_def(cfg_obj_t *cctx, char *name, cfg_obj_t **ret) { isc_result_t result; cfg_obj_t *acls = NULL; 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)) { cfg_obj_t *acl = cfg_listelt_value(elt); const char *aclname = cfg_obj_asstring(cfg_tuple_get(acl, "name")); if (strcasecmp(aclname, name) == 0) { *ret = cfg_tuple_get(acl, "value"); return (ISC_R_SUCCESS); } } return (ISC_R_NOTFOUND); } static isc_result_t convert_named_acl(cfg_obj_t *nameobj, cfg_obj_t *cctx, ns_aclconfctx_t *ctx, isc_mem_t *mctx, dns_acl_t **target) { isc_result_t result; cfg_obj_t *cacl = NULL; dns_acl_t *dacl; 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) { 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, dns_lctx, ISC_LOG_WARNING, "undefined ACL '%s'", aclname); return (result); } result = ns_acl_fromconfig(cacl, cctx, ctx, mctx, &dacl); 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(cfg_obj_t *keyobj, 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_init(&buf, txtname, keylen); isc_buffer_add(&buf, keylen); dns_fixedname_init(&fixname); result = dns_name_fromtext(dns_fixedname_name(&fixname), &buf, dns_rootname, ISC_FALSE, NULL); if (result != ISC_R_SUCCESS) { cfg_obj_log(keyobj, dns_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)); } isc_result_t ns_acl_fromconfig(cfg_obj_t *caml, cfg_obj_t *cctx, ns_aclconfctx_t *ctx, isc_mem_t *mctx, dns_acl_t **target) { isc_result_t result; unsigned int count; dns_acl_t *dacl = NULL; dns_aclelement_t *de; cfg_listelt_t *elt; REQUIRE(target != NULL && *target == NULL); count = 0; for (elt = cfg_list_first(caml); elt != NULL; elt = cfg_list_next(elt)) count++; result = dns_acl_create(mctx, count, &dacl); if (result != ISC_R_SUCCESS) return (result); de = dacl->elements; for (elt = cfg_list_first(caml); elt != NULL; elt = cfg_list_next(elt)) { cfg_obj_t *ce = cfg_listelt_value(elt); if (cfg_obj_istuple(ce)) { /* This must be a negated element. */ ce = cfg_tuple_get(ce, "value"); de->negative = ISC_TRUE; } else { de->negative = ISC_FALSE; } if (cfg_obj_isnetprefix(ce)) { /* Network prefix */ de->type = dns_aclelementtype_ipprefix; cfg_obj_asnetprefix(ce, &de->u.ip_prefix.address, &de->u.ip_prefix.prefixlen); } else if (cfg_obj_istype(ce, &cfg_type_keyref)) { /* Key name */ de->type = dns_aclelementtype_keyname; dns_name_init(&de->u.keyname, NULL); result = convert_keyname(ce, mctx, &de->u.keyname); if (result != ISC_R_SUCCESS) goto cleanup; } else if (cfg_obj_islist(ce)) { /* Nested ACL */ de->type = dns_aclelementtype_nestedacl; result = ns_acl_fromconfig(ce, cctx, ctx, mctx, &de->u.nestedacl); if (result != ISC_R_SUCCESS) goto cleanup; } else if (cfg_obj_isstring(ce)) { /* ACL name */ char *name = cfg_obj_asstring(ce); if (strcasecmp(name, "localhost") == 0) { de->type = dns_aclelementtype_localhost; } else if (strcasecmp(name, "localnets") == 0) { de->type = dns_aclelementtype_localnets; } else if (strcasecmp(name, "any") == 0) { de->type = dns_aclelementtype_any; } else if (strcasecmp(name, "none") == 0) { de->type = dns_aclelementtype_any; de->negative = ISC_TF(! de->negative); } else { de->type = dns_aclelementtype_nestedacl; result = convert_named_acl(ce, cctx, ctx, mctx, &de->u.nestedacl); if (result != ISC_R_SUCCESS) goto cleanup; } } else { cfg_obj_log(ce, dns_lctx, ISC_LOG_WARNING, "address match list contains " "unsupported element type"); result = ISC_R_FAILURE; goto cleanup; } de++; dacl->length++; } *target = dacl; return (ISC_R_SUCCESS); cleanup: dns_acl_detach(&dacl); return (result); }