Unbound: remove unbound from in-tree source

We'll instead use a git submodule to pull from our unbound repo.

1 files changed, 0 insertions, 567 deletions

diff --git a/external/unbound/services/outside_network.h b/external/unbound/services/outside_network.h
deleted file mode 100644
index befd512f0..000000000
--- a/external/unbound/services/outside_network.h
+++ /dev/null
@@ -1,567 +0,0 @@
-/*
- * services/outside_network.h - listen to answers from the network
- *
- * 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 has functions to send queries to authoritative servers,
- * and wait for the pending answer, with timeouts.
- */
-
-#ifndef OUTSIDE_NETWORK_H
-#define OUTSIDE_NETWORK_H
-
-#include "util/rbtree.h"
-#include "util/netevent.h"
-#include "dnstap/dnstap_config.h"
-struct pending;
-struct pending_timeout;
-struct ub_randstate;
-struct pending_tcp;
-struct waiting_tcp;
-struct waiting_udp;
-struct infra_cache;
-struct port_comm;
-struct port_if;
-struct sldns_buffer;
-struct serviced_query;
-struct dt_env;
-struct edns_option;
-struct module_env;
-struct module_qstate;
-struct query_info;
-
-/**
- * Send queries to outside servers and wait for answers from servers.
- * Contains answer-listen sockets.
- */
-struct outside_network {
-	/** Base for select calls */
-	struct comm_base* base;
-	/** pointer to time in seconds */
-	time_t* now_secs;
-	/** pointer to time in microseconds */
-	struct timeval* now_tv;
-
-	/** buffer shared by UDP connections, since there is only one
-	    datagram at any time. */
-	struct sldns_buffer* udp_buff;
-	/** serviced_callbacks malloc overhead when processing multiple
-	 * identical serviced queries to the same server. */
-	size_t svcd_overhead;
-	/** use x20 bits to encode additional ID random bits */
-	int use_caps_for_id;
-	/** outside network wants to quit. Stop queued msgs from sent. */
-	int want_to_quit;
-
-	/** number of unwanted replies received (for statistics) */
-	size_t unwanted_replies;
-	/** cumulative total of unwanted replies (for defense) */
-	size_t unwanted_total;
-	/** threshold when to take defensive action. If 0 then never. */
-	size_t unwanted_threshold;
-	/** what action to take, called when defensive action is needed */
-	void (*unwanted_action)(void*);
-	/** user param for action */
-	void* unwanted_param;
-
-	/** linked list of available commpoints, unused file descriptors,
-	 * for use as outgoing UDP ports. cp.fd=-1 in them. */
-	struct port_comm* unused_fds;
-	/** if udp is done */
-	int do_udp;
-	/** if udp is delay-closed (delayed answers do not meet closed port)*/
-	int delayclose;
-	/** timeout for delayclose */
-	struct timeval delay_tv;
-
-	/** array of outgoing IP4 interfaces */
-	struct port_if* ip4_ifs;
-	/** number of outgoing IP4 interfaces */
-	int num_ip4;
-
-	/** array of outgoing IP6 interfaces */
-	struct port_if* ip6_ifs;
-	/** number of outgoing IP6 interfaces */
-	int num_ip6;
-
-	/** pending udp queries waiting to be sent out, waiting for fd */
-	struct pending* udp_wait_first;
-	/** last pending udp query in list */
-	struct pending* udp_wait_last;
-
-	/** pending udp answers. sorted by id, addr */
-	rbtree_type* pending;
-	/** serviced queries, sorted by qbuf, addr, dnssec */
-	rbtree_type* serviced;
-	/** host cache, pointer but not owned by outnet. */
-	struct infra_cache* infra;
-	/** where to get random numbers */
-	struct ub_randstate* rnd;
-	/** ssl context to create ssl wrapped TCP with DNS connections */
-	void* sslctx;
-#ifdef USE_DNSTAP
-	/** dnstap environment */
-	struct dt_env* dtenv;
-#endif
-	/** maximum segment size of tcp socket */
-	int tcp_mss;
-
-	/**
-	 * Array of tcp pending used for outgoing TCP connections.
-	 * Each can be used to establish a TCP connection with a server.
-	 * The file descriptors are -1 if they are free, and need to be 
-	 * opened for the tcp connection. Can be used for ip4 and ip6.
-	 */
-	struct pending_tcp **tcp_conns;
-	/** number of tcp communication points. */
-	size_t num_tcp;
-	/** number of tcp communication points in use. */
-	size_t num_tcp_outgoing;
-	/** list of tcp comm points that are free for use */
-	struct pending_tcp* tcp_free;
-	/** list of tcp queries waiting for a buffer */
-	struct waiting_tcp* tcp_wait_first;
-	/** last of waiting query list */
-	struct waiting_tcp* tcp_wait_last;
-};
-
-/**
- * Outgoing interface. Ports available and currently used are tracked
- * per interface
- */
-struct port_if {
-	/** address ready to allocate new socket (except port no). */
-	struct sockaddr_storage addr;
-	/** length of addr field */
-	socklen_t addrlen;
-
-	/** prefix length of network address (in bits), for randomisation.
-	 * if 0, no randomisation. */
-	int pfxlen;
-
-	/** the available ports array. These are unused.
-	 * Only the first total-inuse part is filled. */
-	int* avail_ports;
-	/** the total number of available ports (size of the array) */
-	int avail_total;
-
-	/** array of the commpoints currently in use. 
-	 * allocated for max number of fds, first part in use. */
-	struct port_comm** out;
-	/** max number of fds, size of out array */
-	int maxout;
-	/** number of commpoints (and thus also ports) in use */
-	int inuse;
-};
-
-/**
- * Outgoing commpoint for UDP port.
- */
-struct port_comm {
-	/** next in free list */
-	struct port_comm* next;
-	/** which port number (when in use) */
-	int number;
-	/** interface it is used in */
-	struct port_if* pif;
-	/** index in the out array of the interface */
-	int index;
-	/** number of outstanding queries on this port */
-	int num_outstanding;
-	/** UDP commpoint, fd=-1 if not in use */
-	struct comm_point* cp;
-};
-
-/**
- * A query that has an answer pending for it.
- */
-struct pending {
-	/** redblacktree entry, key is the pending struct(id, addr). */
-	rbnode_type node;
-	/** the ID for the query. int so that a value out of range can
-	 * be used to signify a pending that is for certain not present in
-	 * the rbtree. (and for which deletion is safe). */
-	unsigned int id;
-	/** remote address. */
-	struct sockaddr_storage addr;
-	/** length of addr field in use. */
-	socklen_t addrlen;
-	/** comm point it was sent on (and reply must come back on). */
-	struct port_comm* pc;
-	/** timeout event */
-	struct comm_timer* timer;
-	/** callback for the timeout, error or reply to the message */
-	comm_point_callback_type* cb;
-	/** callback user argument */
-	void* cb_arg;
-	/** the outside network it is part of */
-	struct outside_network* outnet;
-	/** the corresponding serviced_query */
-	struct serviced_query* sq;
-
-	/*---- filled if udp pending is waiting -----*/
-	/** next in waiting list. */
-	struct pending* next_waiting;
-	/** timeout in msec */
-	int timeout;
-	/** The query itself, the query packet to send. */
-	uint8_t* pkt;
-	/** length of query packet. */
-	size_t pkt_len;
-};
-
-/**
- * Pending TCP query to server.
- */
-struct pending_tcp {
-	/** next in list of free tcp comm points, or NULL. */
-	struct pending_tcp* next_free;
-	/** the ID for the query; checked in reply */
-	uint16_t id;
-	/** tcp comm point it was sent on (and reply must come back on). */
-	struct comm_point* c;
-	/** the query being serviced, NULL if the pending_tcp is unused. */
-	struct waiting_tcp* query;
-};
-
-/**
- * Query waiting for TCP buffer.
- */
-struct waiting_tcp {
-	/** 
-	 * next in waiting list.
-	 * if pkt==0, this points to the pending_tcp structure.
-	 */
-	struct waiting_tcp* next_waiting;
-	/** timeout event; timer keeps running whether the query is
-	 * waiting for a buffer or the tcp reply is pending */
-	struct comm_timer* timer;
-	/** the outside network it is part of */
-	struct outside_network* outnet;
-	/** remote address. */
-	struct sockaddr_storage addr;
-	/** length of addr field in use. */
-	socklen_t addrlen;
-	/** 
-	 * The query itself, the query packet to send.
-	 * allocated after the waiting_tcp structure.
-	 * set to NULL when the query is serviced and it part of pending_tcp.
-	 * if this is NULL, the next_waiting points to the pending_tcp.
-	 */
-	uint8_t* pkt;
-	/** length of query packet. */
-	size_t pkt_len;
-	/** callback for the timeout, error or reply to the message */
-	comm_point_callback_type* cb;
-	/** callback user argument */
-	void* cb_arg;
-	/** if it uses ssl upstream */
-	int ssl_upstream;
-};
-
-/**
- * Callback to party interested in serviced query results.
- */
-struct service_callback {
-	/** next in callback list */
-	struct service_callback* next;
-	/** callback function */
-	comm_point_callback_type* cb;
-	/** user argument for callback function */
-	void* cb_arg;
-};
-
-/** fallback size for fragmentation for EDNS in IPv4 */
-#define EDNS_FRAG_SIZE_IP4 1472
-/** fallback size for EDNS in IPv6, fits one fragment with ip6-tunnel-ids */
-#define EDNS_FRAG_SIZE_IP6 1232
-
-/**
- * Query service record.
- * Contains query and destination. UDP, TCP, EDNS are all tried.
- * complete with retries and timeouts. A number of interested parties can
- * receive a callback.
- */
-struct serviced_query {
-	/** The rbtree node, key is this record */
-	rbnode_type node;
-	/** The query that needs to be answered. Starts with flags u16,
-	 * then qdcount, ..., including qname, qtype, qclass. Does not include
-	 * EDNS record. */
-	uint8_t* qbuf;
-	/** length of qbuf. */
-	size_t qbuflen;
-	/** If an EDNS section is included, the DO/CD bit will be turned on. */
-	int dnssec;
-	/** We want signatures, or else the answer is likely useless */
-	int want_dnssec;
-	/** ignore capsforid */
-	int nocaps;
-	/** tcp upstream used, use tcp, or ssl_upstream for SSL */
-	int tcp_upstream, ssl_upstream;
-	/** where to send it */
-	struct sockaddr_storage addr;
-	/** length of addr field in use. */
-	socklen_t addrlen;
-	/** zone name, uncompressed domain name in wireformat */
-	uint8_t* zone;
-	/** length of zone name */
-	size_t zonelen;
-	/** qtype */
-	int qtype;
-	/** current status */
-	enum serviced_query_status {
-		/** initial status */
-		serviced_initial,
-		/** UDP with EDNS sent */
-		serviced_query_UDP_EDNS,
-		/** UDP without EDNS sent */
-		serviced_query_UDP,
-		/** TCP with EDNS sent */
-		serviced_query_TCP_EDNS,
-		/** TCP without EDNS sent */
-		serviced_query_TCP,
-		/** probe to test EDNS lameness (EDNS is dropped) */
-		serviced_query_PROBE_EDNS,
-		/** probe to test noEDNS0 (EDNS gives FORMERRorNOTIMP) */
-		serviced_query_UDP_EDNS_fallback,
-		/** probe to test TCP noEDNS0 (EDNS gives FORMERRorNOTIMP) */
-		serviced_query_TCP_EDNS_fallback,
-		/** send UDP query with EDNS1480 (or 1280) */
-		serviced_query_UDP_EDNS_FRAG
-	} 	
-		/** variable with current status */ 
-		status;
-	/** true if serviced_query is scheduled for deletion already */
-	int to_be_deleted;
-	/** number of UDP retries */
-	int retry;
-	/** time last UDP was sent */
-	struct timeval last_sent_time;
-	/** rtt of last (UDP) message */
-	int last_rtt;
-	/** do we know edns probe status already, for UDP_EDNS queries */
-	int edns_lame_known;
-	/** edns options to use for sending upstream packet */
-	struct edns_option* opt_list;
-	/** outside network this is part of */
-	struct outside_network* outnet;
-	/** list of interested parties that need callback on results. */
-	struct service_callback* cblist;
-	/** the UDP or TCP query that is pending, see status which */
-	void* pending;
-};
-
-/**
- * Create outside_network structure with N udp ports.
- * @param base: the communication base to use for event handling.
- * @param bufsize: size for network buffers.
- * @param num_ports: number of udp ports to open per interface.
- * @param ifs: interface names (or NULL for default interface).
- *    These interfaces must be able to access all authoritative servers.
- * @param num_ifs: number of names in array ifs.
- * @param do_ip4: service IP4.
- * @param do_ip6: service IP6.
- * @param num_tcp: number of outgoing tcp buffers to preallocate.
- * @param infra: pointer to infra cached used for serviced queries.
- * @param rnd: stored to create random numbers for serviced queries.
- * @param use_caps_for_id: enable to use 0x20 bits to encode id randomness.
- * @param availports: array of available ports. 
- * @param numavailports: number of available ports in array.
- * @param unwanted_threshold: when to take defensive action.
- * @param unwanted_action: the action to take.
- * @param unwanted_param: user parameter to action.
- * @param tcp_mss: maximum segment size of tcp socket.
- * @param do_udp: if udp is done.
- * @param sslctx: context to create outgoing connections with (if enabled).
- * @param delayclose: if not 0, udp sockets are delayed before timeout closure.
- * 	msec to wait on timeouted udp sockets.
- * @param dtenv: environment to send dnstap events with (if enabled).
- * @return: the new structure (with no pending answers) or NULL on error.
- */
-struct outside_network* outside_network_create(struct comm_base* base,
-	size_t bufsize, size_t num_ports, char** ifs, int num_ifs,
-	int do_ip4, int do_ip6, size_t num_tcp, struct infra_cache* infra, 
-	struct ub_randstate* rnd, int use_caps_for_id, int* availports, 
-	int numavailports, size_t unwanted_threshold, int tcp_mss,
-	void (*unwanted_action)(void*), void* unwanted_param, int do_udp,
-	void* sslctx, int delayclose, struct dt_env *dtenv);
-
-/**
- * Delete outside_network structure.
- * @param outnet: object to delete.
- */
-void outside_network_delete(struct outside_network* outnet);
-
-/**
- * Prepare for quit. Sends no more queries, even if queued up.
- * @param outnet: object to prepare for removal
- */
-void outside_network_quit_prepare(struct outside_network* outnet);
-
-/**
- * Send UDP query, create pending answer.
- * Changes the ID for the query to be random and unique for that destination.
- * @param sq: serviced query.
- * @param packet: wireformat query to send to destination.
- * @param timeout: in milliseconds from now.
- * @param callback: function to call on error, timeout or reply.
- * @param callback_arg: user argument for callback function.
- * @return: NULL on error for malloc or socket. Else the pending query object.
- */
-struct pending* pending_udp_query(struct serviced_query* sq,
-	struct sldns_buffer* packet, int timeout, comm_point_callback_type* callback,
-	void* callback_arg);
-
-/**
- * Send TCP query. May wait for TCP buffer. Selects ID to be random, and 
- * checks id.
- * @param sq: serviced query.
- * @param packet: wireformat query to send to destination. copied from.
- * @param timeout: in seconds from now.
- *    Timer starts running now. Timer may expire if all buffers are used,
- *    without any query been sent to the server yet.
- * @param callback: function to call on error, timeout or reply.
- * @param callback_arg: user argument for callback function.
- * @return: false on error for malloc or socket. Else the pending TCP object.
- */
-struct waiting_tcp* pending_tcp_query(struct serviced_query* sq,
-	struct sldns_buffer* packet, int timeout, comm_point_callback_type* callback,
-	void* callback_arg);
-
-/**
- * Delete pending answer.
- * @param outnet: outside network the pending query is part of.
- *    Internal feature: if outnet is NULL, p is not unlinked from rbtree.
- * @param p: deleted
- */
-void pending_delete(struct outside_network* outnet, struct pending* p);
-
-/**
- * Perform a serviced query to the authoritative servers.
- * Duplicate efforts are detected, and EDNS, TCP and UDP retry is performed.
- * @param outnet: outside network, with rbtree of serviced queries.
- * @param qinfo: query info.
- * @param flags: flags u16 (host format), includes opcode, CD bit.
- * @param dnssec: if set, DO bit is set in EDNS queries.
- *	If the value includes BIT_CD, CD bit is set when in EDNS queries.
- *	If the value includes BIT_DO, DO bit is set when in EDNS queries.
- * @param want_dnssec: signatures are needed, without EDNS the answer is
- * 	likely to be useless.
- * @param nocaps: ignore use_caps_for_id and use unperturbed qname.
- * @param tcp_upstream: use TCP for upstream queries.
- * @param ssl_upstream: use SSL for upstream queries.
- * @param addr: to which server to send the query.
- * @param addrlen: length of addr.
- * @param zone: name of the zone of the delegation point. wireformat dname.
-	This is the delegation point name for which the server is deemed
-	authoritative.
- * @param zonelen: length of zone.
- * @param qstate: module qstate. Mainly for inspecting the available
- *	edns_opts_lists.
- * @param callback: callback function.
- * @param callback_arg: user argument to callback function.
- * @param buff: scratch buffer to create query contents in. Empty on exit.
- * @param env: the module environment.
- * @return 0 on error, or pointer to serviced query that is used to answer
- *	this serviced query may be shared with other callbacks as well.
- */
-struct serviced_query* outnet_serviced_query(struct outside_network* outnet,
-	struct query_info* qinfo, uint16_t flags, int dnssec, int want_dnssec,
-	int nocaps, int tcp_upstream, int ssl_upstream,
-	struct sockaddr_storage* addr, socklen_t addrlen, uint8_t* zone,
-	size_t zonelen, struct module_qstate* qstate,
-	comm_point_callback_type* callback, void* callback_arg,
-	struct sldns_buffer* buff, struct module_env* env);
-
-/**
- * Remove service query callback.
- * If that leads to zero callbacks, the query is completely cancelled.
- * @param sq: serviced query to adjust.
- * @param cb_arg: callback argument of callback that needs removal.
- *	same as the callback_arg to outnet_serviced_query().
- */
-void outnet_serviced_query_stop(struct serviced_query* sq, void* cb_arg);
-
-/**
- * Get memory size in use by outside network.
- * Counts buffers and outstanding query (serviced queries) malloced data.
- * @param outnet: outside network structure.
- * @return size in bytes.
- */
-size_t outnet_get_mem(struct outside_network* outnet);
-
-/**
- * Get memory size in use by serviced query while it is servicing callbacks.
- * This takes into account the pre-deleted status of it; it will be deleted
- * when the callbacks are done.
- * @param sq: serviced query. 
- * @return size in bytes.
- */
-size_t serviced_get_mem(struct serviced_query* sq);
-
-/** callback for incoming udp answers from the network */
-int outnet_udp_cb(struct comm_point* c, void* arg, int error,
-	struct comm_reply *reply_info);
-
-/** callback for pending tcp connections */
-int outnet_tcp_cb(struct comm_point* c, void* arg, int error,
-	struct comm_reply *reply_info);
-
-/** callback for udp timeout */
-void pending_udp_timer_cb(void *arg);
-
-/** callback for udp delay for timeout */
-void pending_udp_timer_delay_cb(void *arg);
-
-/** callback for outgoing TCP timer event */
-void outnet_tcptimer(void* arg);
-
-/** callback for serviced query UDP answers */
-int serviced_udp_callback(struct comm_point* c, void* arg, int error,
-        struct comm_reply* rep);
-
-/** TCP reply or error callback for serviced queries */
-int serviced_tcp_callback(struct comm_point* c, void* arg, int error,
-        struct comm_reply* rep);
-
-/** compare function of pending rbtree */
-int pending_cmp(const void* key1, const void* key2);
-
-/** compare function of serviced query rbtree */
-int serviced_cmp(const void* key1, const void* key2);
-
-#endif /* OUTSIDE_NETWORK_H */