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 "sldns/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 */ 180