unbound/libunbound/worker.h

   1 /*
   2  * libunbound/worker.h - prototypes for worker methods.
   3  *
   4  * Copyright (c) 2007, NLnet Labs. All rights reserved.
   5  *
   6  * This software is open source.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * Redistributions of source code must retain the above copyright notice,
  13  * this list of conditions and the following disclaimer.
  14  *
  15  * Redistributions in binary form must reproduce the above copyright notice,
  16  * this list of conditions and the following disclaimer in the documentation
  17  * and/or other materials provided with the distribution.
  18  *
  19  * Neither the name of the NLNET LABS nor the names of its contributors may
  20  * be used to endorse or promote products derived from this software without
  21  * specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  25  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  26  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  27  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  33  * POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36 /**
  37  * \file
  38  *
  39  * This file declares the methods any worker has to implement.
  40  */
  41
  42 #ifndef LIBUNBOUND_WORKER_H
  43 #define LIBUNBOUND_WORKER_H
  44
  45 #include "ldns/sbuffer.h"
  46 #include "util/data/packed_rrset.h" /* for enum sec_status */
  47 struct comm_reply;
  48 struct comm_point;
  49 struct module_qstate;
  50 struct tube;
  51
  52 /**
  53  * Worker service routine to send serviced queries to authoritative servers.
  54  * @param qname: query name. (host order)
  55  * @param qnamelen: length in bytes of qname, including trailing 0.
  56  * @param qtype: query type. (host order)
  57  * @param qclass: query class. (host order)
  58  * @param flags: host order flags word, with opcode and CD bit.
  59  * @param dnssec: if set, EDNS record will have DO bit set.
  60  * @param want_dnssec: signatures needed.
  61  * @param nocaps: ignore capsforid(if in config), do not perturb qname.
  62  * @param addr: where to.
  63  * @param addrlen: length of addr.
  64  * @param zone: delegation point name.
  65  * @param zonelen: length of zone name wireformat dname.
  66  * @param q: wich query state to reactivate upon return.
  67  * @return: false on failure (memory or socket related). no query was
  68  *      sent.
  69  */
  70 struct outbound_entry* libworker_send_query(uint8_t* qname, size_t qnamelen,
  71         uint16_t qtype, uint16_t qclass, uint16_t flags, int dnssec,
  72         int want_dnssec, int nocaps, struct sockaddr_storage* addr,
  73         socklen_t addrlen, uint8_t* zone, size_t zonelen,
  74         struct module_qstate* q);
  75
  76 /** process incoming replies from the network */
  77 int libworker_handle_reply(struct comm_point* c, void* arg, int error,
  78         struct comm_reply* reply_info);
  79
  80 /** process incoming serviced query replies from the network */
  81 int libworker_handle_service_reply(struct comm_point* c, void* arg, int error,
  82         struct comm_reply* reply_info);
  83
  84 /** handle control command coming into server */
  85 void libworker_handle_control_cmd(struct tube* tube, uint8_t* msg, size_t len,
  86         int err, void* arg);
  87
  88 /** mesh callback with fg results */
  89 void libworker_fg_done_cb(void* arg, int rcode, sldns_buffer* buf,
  90         enum sec_status s, char* why_bogus);
  91
  92 /** mesh callback with bg results */
  93 void libworker_bg_done_cb(void* arg, int rcode, sldns_buffer* buf,
  94         enum sec_status s, char* why_bogus);
  95
  96 /** mesh callback with event results */
  97 void libworker_event_done_cb(void* arg, int rcode, struct sldns_buffer* buf,
  98         enum sec_status s, char* why_bogus);
  99
 100 /**
 101  * Worker signal handler function. User argument is the worker itself.
 102  * @param sig: signal number.
 103  * @param arg: the worker (main worker) that handles signals.
 104  */
 105 void worker_sighandler(int sig, void* arg);
 106
 107 /**
 108  * Worker service routine to send serviced queries to authoritative servers.
 109  * @param qname: query name. (host order)
 110  * @param qnamelen: length in bytes of qname, including trailing 0.
 111  * @param qtype: query type. (host order)
 112  * @param qclass: query class. (host order)
 113  * @param flags: host order flags word, with opcode and CD bit.
 114  * @param dnssec: if set, EDNS record will have DO bit set.
 115  * @param want_dnssec: signatures needed.
 116  * @param nocaps: ignore capsforid(if in config), do not perturb qname.
 117  * @param addr: where to.
 118  * @param addrlen: length of addr.
 119  * @param zone: wireformat dname of the zone.
 120  * @param zonelen: length of zone name.
 121  * @param q: wich query state to reactivate upon return.
 122  * @return: false on failure (memory or socket related). no query was
 123  *      sent.
 124  */
 125 struct outbound_entry* worker_send_query(uint8_t* qname, size_t qnamelen,
 126         uint16_t qtype, uint16_t qclass, uint16_t flags, int dnssec,
 127         int want_dnssec, int nocaps, struct sockaddr_storage* addr,
 128         socklen_t addrlen, uint8_t* zone, size_t zonelen,
 129         struct module_qstate* q);
 130
 131 /**
 132  * process control messages from the main thread. Frees the control
 133  * command message.
 134  * @param tube: tube control message came on.
 135  * @param msg: message contents.  Is freed.
 136  * @param len: length of message.
 137  * @param error: if error (NETEVENT_*) happened.
 138  * @param arg: user argument
 139  */
 140 void worker_handle_control_cmd(struct tube* tube, uint8_t* msg, size_t len,
 141         int error, void* arg);
 142
 143 /** handles callbacks from listening event interface */
 144 int worker_handle_request(struct comm_point* c, void* arg, int error,
 145         struct comm_reply* repinfo);
 146
 147 /** process incoming replies from the network */
 148 int worker_handle_reply(struct comm_point* c, void* arg, int error,
 149         struct comm_reply* reply_info);
 150
 151 /** process incoming serviced query replies from the network */
 152 int worker_handle_service_reply(struct comm_point* c, void* arg, int error,
 153         struct comm_reply* reply_info);
 154
 155 /** cleanup the cache to remove all rrset IDs from it, arg is worker */
 156 void worker_alloc_cleanup(void* arg);
 157
 158 /** statistics timer callback handler */
 159 void worker_stat_timer_cb(void* arg);
 160
 161 /** probe timer callback handler */
 162 void worker_probe_timer_cb(void* arg);
 163
 164 /** start accept callback handler */
 165 void worker_start_accept(void* arg);
 166
 167 /** stop accept callback handler */
 168 void worker_stop_accept(void* arg);
 169
 170 /** handle remote control accept callbacks */
 171 int remote_accept_callback(struct comm_point*, void*, int, struct comm_reply*);
 172
 173 /** handle remote control data callbacks */
 174 int remote_control_callback(struct comm_point*, void*, int, struct comm_reply*);
 175
 176 /** routine to printout option values over SSL */
 177 void  remote_get_opt_ssl(char* line, void* arg);
 178
 179 #endif /* LIBUNBOUND_WORKER_H */