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Diffstat (limited to 'external/unbound/services/view.c')
| -rw-r--r-- | external/unbound/services/view.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/external/unbound/services/view.c b/external/unbound/services/view.c new file mode 100644 index 000000000..33f4f4986 --- /dev/null +++ b/external/unbound/services/view.c @@ -0,0 +1,212 @@ +/* + * services/view.c - named views containing local zones authority service. + * + * Copyright (c) 2016, 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 + * + * This file contains functions to enable named views that can hold local zone + * authority service. + */ +#include "config.h" +#include "services/view.h" +#include "services/localzone.h" +#include "util/config_file.h" + +int +view_cmp(const void* v1, const void* v2) +{ + struct view* a = (struct view*)v1; + struct view* b = (struct view*)v2; + + return strcmp(a->name, b->name); +} + +struct views* +views_create(void) +{ + struct views* v = (struct views*)calloc(1, + sizeof(*v)); + if(!v) + return NULL; + rbtree_init(&v->vtree, &view_cmp); + lock_rw_init(&v->lock); + lock_protect(&v->lock, &v->vtree, sizeof(v->vtree)); + return v; +} + +/** This prototype is defined in in respip.h, but we want to avoid + * unnecessary dependencies */ +void respip_set_delete(struct respip_set *set); + +void +view_delete(struct view* v) +{ + if(!v) + return; + lock_rw_destroy(&v->lock); + local_zones_delete(v->local_zones); + respip_set_delete(v->respip_set); + free(v->name); + free(v); +} + +static void +delviewnode(rbnode_type* n, void* ATTR_UNUSED(arg)) +{ + struct view* v = (struct view*)n; + view_delete(v); +} + +void +views_delete(struct views* v) +{ + if(!v) + return; + lock_rw_destroy(&v->lock); + traverse_postorder(&v->vtree, delviewnode, NULL); + free(v); +} + +/** create a new view */ +static struct view* +view_create(char* name) +{ + struct view* v = (struct view*)calloc(1, sizeof(*v)); + if(!v) + return NULL; + v->node.key = v; + if(!(v->name = strdup(name))) { + free(v); + return NULL; + } + lock_rw_init(&v->lock); + lock_protect(&v->lock, &v->name, sizeof(*v)-sizeof(rbnode_type)); + return v; +} + +/** enter a new view returns with WRlock */ +static struct view* +views_enter_view_name(struct views* vs, char* name) +{ + struct view* v = view_create(name); + if(!v) { + log_err("out of memory"); + return NULL; + } + + /* add to rbtree */ + lock_rw_wrlock(&vs->lock); + lock_rw_wrlock(&v->lock); + if(!rbtree_insert(&vs->vtree, &v->node)) { + log_warn("duplicate view: %s", name); + lock_rw_unlock(&v->lock); + view_delete(v); + lock_rw_unlock(&vs->lock); + return NULL; + } + lock_rw_unlock(&vs->lock); + return v; +} + +int +views_apply_cfg(struct views* vs, struct config_file* cfg) +{ + struct config_view* cv; + struct view* v; + struct config_file lz_cfg; + /* Check existence of name in first view (last in config). Rest of + * views are already checked when parsing config. */ + if(cfg->views && !cfg->views->name) { + log_err("view without a name"); + return 0; + } + for(cv = cfg->views; cv; cv = cv->next) { + /* create and enter view */ + if(!(v = views_enter_view_name(vs, cv->name))) + return 0; + v->isfirst = cv->isfirst; + if(cv->local_zones || cv->local_data) { + if(!(v->local_zones = local_zones_create())){ + lock_rw_unlock(&v->lock); + return 0; + } + memset(&lz_cfg, 0, sizeof(lz_cfg)); + lz_cfg.local_zones = cv->local_zones; + lz_cfg.local_data = cv->local_data; + lz_cfg.local_zones_nodefault = + cv->local_zones_nodefault; + if(!local_zones_apply_cfg(v->local_zones, &lz_cfg)){ + lock_rw_unlock(&v->lock); + return 0; + } + /* local_zones, local_zones_nodefault and local_data + * are free'd from config_view by local_zones_apply_cfg. + * Set pointers to NULL. */ + cv->local_zones = NULL; + cv->local_data = NULL; + cv->local_zones_nodefault = NULL; + } + lock_rw_unlock(&v->lock); + } + return 1; +} + +/** find a view by name */ +struct view* +views_find_view(struct views* vs, const char* name, int write) +{ + struct view* v; + struct view key; + key.node.key = &v; + key.name = (char *)name; + lock_rw_rdlock(&vs->lock); + if(!(v = (struct view*)rbtree_search(&vs->vtree, &key.node))) { + lock_rw_unlock(&vs->lock); + return 0; + } + if(write) { + lock_rw_wrlock(&v->lock); + } else { + lock_rw_rdlock(&v->lock); + } + lock_rw_unlock(&vs->lock); + return v; +} + +void views_print(struct views* v) +{ + /* TODO implement print */ + (void)v; +} |