diff options
Diffstat (limited to 'contrib/unbound/ipsecmod/ipsecmod-whitelist.c')
| -rw-r--r-- | contrib/unbound/ipsecmod/ipsecmod-whitelist.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/contrib/unbound/ipsecmod/ipsecmod-whitelist.c b/contrib/unbound/ipsecmod/ipsecmod-whitelist.c new file mode 100644 index 000000000000..c2b1f5d4a596 --- /dev/null +++ b/contrib/unbound/ipsecmod/ipsecmod-whitelist.c @@ -0,0 +1,158 @@ +/* + * ipsecmod/ipsecmod-whitelist.h - White listed domains for the ipsecmod to + * operate on. + * + * Copyright (c) 2017, NLnet Labs. All rights reserved. + * + * This software is open source. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * Neither the name of the NLNET LABS nor the names of its contributors may + * be used to endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +/** + * \file + * + * Keep track of the white listed domains for ipsecmod. + */ + +#include "config.h" + +#ifdef USE_IPSECMOD +#include "ipsecmod/ipsecmod.h" +#include "ipsecmod/ipsecmod-whitelist.h" +#include "util/regional.h" +#include "util/log.h" +#include "util/config_file.h" +#include "util/rbtree.h" +#include "util/data/dname.h" +#include "util/storage/dnstree.h" +#include "sldns/str2wire.h" + +/** Apply ipsecmod-whitelist string. */ +static int +whitelist_str_cfg(rbtree_type* whitelist, const char* name) +{ + struct name_tree_node* n; + size_t len; + uint8_t* nm = sldns_str2wire_dname(name, &len); + if(!nm) { + log_err("ipsecmod: could not parse %s for whitelist.", name); + return 0; + } + n = (struct name_tree_node*)calloc(1, sizeof(*n)); + if(!n) { + log_err("ipsecmod: out of memory while creating whitelist."); + free(nm); + return 0; + } + n->node.key = n; + n->name = nm; + n->len = len; + n->labs = dname_count_labels(nm); + n->dclass = LDNS_RR_CLASS_IN; + if(!name_tree_insert(whitelist, n, nm, len, n->labs, n->dclass)) { + /* duplicate element ignored, idempotent */ + free(n->name); + free(n); + } + return 1; +} + +/** Read ipsecmod-whitelist config. */ +static int +read_whitelist(rbtree_type* whitelist, struct config_file* cfg) +{ + struct config_strlist* p; + for(p = cfg->ipsecmod_whitelist; p; p = p->next) { + log_assert(p->str); + if(!whitelist_str_cfg(whitelist, p->str)) + return 0; + } + return 1; +} + +int +ipsecmod_whitelist_apply_cfg(struct ipsecmod_env* ie, + struct config_file* cfg) +{ + ie->whitelist = rbtree_create(name_tree_compare); + if(!read_whitelist(ie->whitelist, cfg)) + return 0; + name_tree_init_parents(ie->whitelist); + return 1; +} + +/** Delete ipsecmod_env->whitelist element. */ +static void +whitelist_free(struct rbnode_type* n, void* ATTR_UNUSED(d)) +{ + if(n) { + free(((struct name_tree_node*)n)->name); + free(n); + } +} + +/** Get memory usage of ipsecmod_env->whitelist element. */ +static void +whitelist_get_mem(struct rbnode_type* n, void* arg) +{ + struct name_tree_node* node = (struct name_tree_node*)n; + size_t* size = (size_t*) arg; + if(node) { + *size += sizeof(node) + node->len; + } +} + +void +ipsecmod_whitelist_delete(rbtree_type* whitelist) +{ + if(whitelist) { + traverse_postorder(whitelist, whitelist_free, NULL); + free(whitelist); + } +} + +int +ipsecmod_domain_is_whitelisted(struct ipsecmod_env* ie, uint8_t* dname, + size_t dname_len, uint16_t qclass) +{ + if(!ie->whitelist) return 1; /* No whitelist, treat as whitelisted. */ + return name_tree_lookup(ie->whitelist, dname, dname_len, + dname_count_labels(dname), qclass) != NULL; +} + +size_t +ipsecmod_whitelist_get_mem(rbtree_type* whitelist) +{ + size_t size = 0; + if(whitelist) { + traverse_postorder(whitelist, whitelist_get_mem, &size); + } + return size; +} + +#endif /* USE_IPSECMOD */ |