added unbound to external deps

1 files changed, 317 insertions, 0 deletions

diff --git a/external/unbound/services/localzone.h b/external/unbound/services/localzone.h
new file mode 100644
index 000000000..788fbfb3b
--- /dev/null
+++ b/external/unbound/services/localzone.h
@@ -0,0 +1,317 @@
+/*
+ * services/localzone.h - local zones authority service.
+ *
+ * Copyright (c) 2007, 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 local zone authority service.
+ */
+
+#ifndef SERVICES_LOCALZONE_H
+#define SERVICES_LOCALZONE_H
+#include "util/rbtree.h"
+#include "util/locks.h"
+struct ub_packed_rrset_key;
+struct regional;
+struct config_file;
+struct edns_data;
+struct query_info;
+struct sldns_buffer;
+
+/**
+ * Local zone type
+ * This type determines processing for queries that did not match
+ * local-data directly.
+ */
+enum localzone_type {
+	/** drop query */
+	local_zone_deny = 0,
+	/** answer with error */
+	local_zone_refuse,
+	/** answer nxdomain or nodata */
+	local_zone_static,
+	/** resolve normally */
+	local_zone_transparent,
+	/** do not block types at localdata names */
+	local_zone_typetransparent,
+	/** answer with data at zone apex */
+	local_zone_redirect,
+	/** remove default AS112 blocking contents for zone
+	 * nodefault is used in config not during service. */
+	local_zone_nodefault
+};
+
+/**
+ * Authoritative local zones storage, shared.
+ */
+struct local_zones {
+	/** lock on the localzone tree */
+	lock_rw_t lock;
+	/** rbtree of struct local_zone */
+	rbtree_t ztree;
+};
+
+/**
+ * Local zone. A locally served authoritative zone.
+ */
+struct local_zone {
+	/** rbtree node, key is name and class */
+	rbnode_t node;
+	/** parent zone, if any. */
+	struct local_zone* parent;
+
+	/** zone name, in uncompressed wireformat */
+	uint8_t* name;
+	/** length of zone name */
+	size_t namelen;
+	/** number of labels in zone name */
+	int namelabs;
+	/** the class of this zone. 
+	 * uses 'dclass' to not conflict with c++ keyword class. */
+	uint16_t dclass;
+
+	/** lock on the data in the structure
+	 * For the node, parent, name, namelen, namelabs, dclass, you
+	 * need to also hold the zones_tree lock to change them (or to
+	 * delete this zone) */
+	lock_rw_t lock;
+
+	/** how to process zone */
+	enum localzone_type type;
+
+	/** in this region the zone's data is allocated.
+	 * the struct local_zone itself is malloced. */
+	struct regional* region;
+	/** local data for this zone
+	 * rbtree of struct local_data */
+	rbtree_t data;
+	/** if data contains zone apex SOA data, this is a ptr to it. */
+	struct ub_packed_rrset_key* soa;
+};
+
+/**
+ * Local data. One domain name, and the RRs to go with it.
+ */
+struct local_data {
+	/** rbtree node, key is name only */
+	rbnode_t node;
+	/** domain name */
+	uint8_t* name;
+	/** length of name */
+	size_t namelen;
+	/** number of labels in name */
+	int namelabs;
+	/** the data rrsets, with different types, linked list.
+	 * If this list is NULL, the node is an empty non-terminal. */
+	struct local_rrset* rrsets;
+};
+
+/**
+ * A local data RRset
+ */
+struct local_rrset {
+	/** next in list */
+	struct local_rrset* next;
+	/** RRset data item */
+	struct ub_packed_rrset_key* rrset;
+};
+
+/**
+ * Create local zones storage
+ * @return new struct or NULL on error.
+ */
+struct local_zones* local_zones_create(void);
+
+/**
+ * Delete local zones storage
+ * @param zones: to delete.
+ */
+void local_zones_delete(struct local_zones* zones);
+
+/**
+ * Apply config settings; setup the local authoritative data. 
+ * Takes care of locking.
+ * @param zones: is set up.
+ * @param cfg: config data.
+ * @return false on error.
+ */
+int local_zones_apply_cfg(struct local_zones* zones, struct config_file* cfg);
+
+/**
+ * Compare two local_zone entries in rbtree. Sort hierarchical but not
+ * canonical
+ * @param z1: zone 1
+ * @param z2: zone 2
+ * @return: -1, 0, +1 comparison value.
+ */
+int local_zone_cmp(const void* z1, const void* z2);
+
+/**
+ * Compare two local_data entries in rbtree. Sort canonical.
+ * @param d1: data 1
+ * @param d2: data 2
+ * @return: -1, 0, +1 comparison value.
+ */
+int local_data_cmp(const void* d1, const void* d2);
+
+/**
+ * Delete one zone
+ * @param z: to delete.
+ */
+void local_zone_delete(struct local_zone* z);
+
+/**
+ * Lookup zone that contains the given name, class.
+ * User must lock the tree or result zone.
+ * @param zones: the zones tree
+ * @param name: dname to lookup
+ * @param len: length of name.
+ * @param labs: labelcount of name.
+ * @param dclass: class to lookup.
+ * @return closest local_zone or NULL if no covering zone is found.
+ */
+struct local_zone* local_zones_lookup(struct local_zones* zones, 
+	uint8_t* name, size_t len, int labs, uint16_t dclass);
+
+/**
+ * Debug helper. Print all zones 
+ * Takes care of locking.
+ * @param zones: the zones tree
+ */
+void local_zones_print(struct local_zones* zones);
+
+/**
+ * Answer authoritatively for local zones.
+ * Takes care of locking.
+ * @param zones: the stored zones (shared, read only).
+ * @param qinfo: query info (parsed).
+ * @param edns: edns info (parsed).
+ * @param buf: buffer with query ID and flags, also for reply.
+ * @param temp: temporary storage region.
+ * @return true if answer is in buffer. false if query is not answered 
+ * by authority data. If the reply should be dropped altogether, the return 
+ * value is true, but the buffer is cleared (empty).
+ */
+int local_zones_answer(struct local_zones* zones, struct query_info* qinfo,
+	struct edns_data* edns, struct sldns_buffer* buf, struct regional* temp);
+
+/**
+ * Parse the string into localzone type.
+ *
+ * @param str: string to parse
+ * @param t: local zone type returned here.
+ * @return 0 on parse error.
+ */
+int local_zone_str2type(const char* str, enum localzone_type* t);
+
+/**
+ * Print localzone type to a string.  Pointer to a constant string.
+ *
+ * @param t: local zone type.
+ * @return constant string that describes type.
+ */
+const char* local_zone_type2str(enum localzone_type t);
+
+/**
+ * Find zone that with exactly given name, class.
+ * User must lock the tree or result zone.
+ * @param zones: the zones tree
+ * @param name: dname to lookup
+ * @param len: length of name.
+ * @param labs: labelcount of name.
+ * @param dclass: class to lookup.
+ * @return the exact local_zone or NULL.
+ */
+struct local_zone* local_zones_find(struct local_zones* zones, 
+	uint8_t* name, size_t len, int labs, uint16_t dclass);
+
+/**
+ * Add a new zone. Caller must hold the zones lock.
+ * Adjusts the other zones as well (parent pointers) after insertion.
+ * The zone must NOT exist (returns NULL and logs error).
+ * @param zones: the zones tree
+ * @param name: dname to add
+ * @param len: length of name.
+ * @param labs: labelcount of name.
+ * @param dclass: class to add.
+ * @param tp: type.
+ * @return local_zone or NULL on error, caller must printout memory error.
+ */
+struct local_zone* local_zones_add_zone(struct local_zones* zones, 
+	uint8_t* name, size_t len, int labs, uint16_t dclass, 
+	enum localzone_type tp);
+
+/**
+ * Delete a zone. Caller must hold the zones lock.
+ * Adjusts the other zones as well (parent pointers) after insertion.
+ * @param zones: the zones tree
+ * @param zone: the zone to delete from tree. Also deletes zone from memory.
+ */
+void local_zones_del_zone(struct local_zones* zones, struct local_zone* zone);
+
+/**
+ * Add RR data into the localzone data.
+ * Looks up the zone, if no covering zone, a transparent zone with the
+ * name of the RR is created.
+ * @param zones: the zones tree. Not locked by caller.
+ * @param rr: string with on RR.
+ * @return false on failure.
+ */
+int local_zones_add_RR(struct local_zones* zones, const char* rr);
+
+/**
+ * Remove data from domain name in the tree.
+ * All types are removed. No effect if zone or name does not exist.
+ * @param zones: zones tree.
+ * @param name: dname to remove
+ * @param len: length of name.
+ * @param labs: labelcount of name.
+ * @param dclass: class to remove.
+ */
+void local_zones_del_data(struct local_zones* zones, 
+	uint8_t* name, size_t len, int labs, uint16_t dclass);
+
+
+/** 
+ * Form wireformat from text format domain name. 
+ * @param str: the domain name in text "www.example.com"
+ * @param res: resulting wireformat is stored here with malloc.
+ * @param len: length of resulting wireformat.
+ * @param labs: number of labels in resulting wireformat.
+ * @return false on error, syntax or memory. Also logged.
+ */
+int parse_dname(const char* str, uint8_t** res, size_t* len, int* labs);
+
+#endif /* SERVICES_LOCALZONE_H */