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| -rw-r--r-- | external/unbound/daemon/worker.h | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/external/unbound/daemon/worker.h b/external/unbound/daemon/worker.h new file mode 100644 index 000000000..ff69bc1ac --- /dev/null +++ b/external/unbound/daemon/worker.h @@ -0,0 +1,173 @@ +/* + * daemon/worker.h - worker that handles a pending list of requests. + * + * 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 describes the worker structure that holds a list of + * pending requests and handles them. + */ + +#ifndef DAEMON_WORKER_H +#define DAEMON_WORKER_H + +#include "libunbound/worker.h" +#include "util/netevent.h" +#include "util/locks.h" +#include "util/alloc.h" +#include "util/data/msgreply.h" +#include "util/data/msgparse.h" +#include "daemon/stats.h" +#include "util/module.h" +#include "dnstap/dnstap.h" +struct listen_dnsport; +struct outside_network; +struct config_file; +struct daemon; +struct listen_port; +struct ub_randstate; +struct regional; +struct tube; +struct daemon_remote; + +/** worker commands */ +enum worker_commands { + /** make the worker quit */ + worker_cmd_quit, + /** obtain statistics */ + worker_cmd_stats, + /** obtain statistics without statsclear */ + worker_cmd_stats_noreset, + /** execute remote control command */ + worker_cmd_remote +}; + +/** + * Structure holding working information for unbound. + * Holds globally visible information. + */ +struct worker { + /** the thread number (in daemon array). First in struct for debug. */ + int thread_num; + /** global shared daemon structure */ + struct daemon* daemon; + /** thread id */ + ub_thread_t thr_id; + /** pipe, for commands for this worker */ + struct tube* cmd; + /** the event base this worker works with */ + struct comm_base* base; + /** the frontside listening interface where request events come in */ + struct listen_dnsport* front; + /** the backside outside network interface to the auth servers */ + struct outside_network* back; + /** ports to be used by this worker. */ + int* ports; + /** number of ports for this worker */ + int numports; + /** the signal handler */ + struct comm_signal* comsig; + /** commpoint to listen to commands. */ + struct comm_point* cmd_com; + /** timer for statistics */ + struct comm_timer* stat_timer; + + /** random() table for this worker. */ + struct ub_randstate* rndstate; + /** do we need to restart or quit (on signal) */ + int need_to_exit; + /** allocation cache for this thread */ + struct alloc_cache alloc; + /** per thread statistics */ + struct server_stats stats; + /** thread scratch regional */ + struct regional* scratchpad; + + /** module environment passed to modules, changed for this thread */ + struct module_env env; + +#ifdef USE_DNSTAP + /** dnstap environment, changed for this thread */ + struct dt_env dtenv; +#endif +}; + +/** + * Create the worker structure. Bare bones version, zeroed struct, + * with backpointers only. Use worker_init on it later. + * @param daemon: the daemon that this worker thread is part of. + * @param id: the thread number from 0.. numthreads-1. + * @param ports: the ports it is allowed to use, array. + * @param n: the number of ports. + * @return: the new worker or NULL on alloc failure. + */ +struct worker* worker_create(struct daemon* daemon, int id, int* ports, int n); + +/** + * Initialize worker. + * Allocates event base, listens to ports + * @param worker: worker to initialize, created with worker_create. + * @param cfg: configuration settings. + * @param ports: list of shared query ports. + * @param do_sigs: if true, worker installs signal handlers. + * @return: false on error. + */ +int worker_init(struct worker* worker, struct config_file *cfg, + struct listen_port* ports, int do_sigs); + +/** + * Make worker work. + */ +void worker_work(struct worker* worker); + +/** + * Delete worker. + */ +void worker_delete(struct worker* worker); + +/** + * Send a command to a worker. Uses blocking writes. + * @param worker: worker to send command to. + * @param cmd: command to send. + */ +void worker_send_cmd(struct worker* worker, enum worker_commands cmd); + +/** + * Init worker stats - includes server_stats_init, outside network and mesh. + * @param worker: the worker to init + */ +void worker_stats_clear(struct worker* worker); + +#endif /* DAEMON_WORKER_H */ |