File: worker.h

package info (click to toggle)
unbound 1.6.0-2~bpo8+1
  • links: PTS, VCS
  • area: main
  • in suites: jessie-backports
  • size: 20,444 kB
  • sloc: ansic: 79,862; sh: 5,040; yacc: 1,900; makefile: 1,315; python: 1,302; perl: 141
file content (175 lines) | stat: -rw-r--r-- 6,738 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
/*
 * libunbound/worker.h - prototypes for worker methods.
 *
 * 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 REGENTS 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 declares the methods any worker has to implement.
 */

#ifndef LIBUNBOUND_WORKER_H
#define LIBUNBOUND_WORKER_H

#include "sldns/sbuffer.h"
#include "util/data/packed_rrset.h" /* for enum sec_status */
struct comm_reply;
struct comm_point;
struct module_qstate;
struct tube;
struct edns_option;
struct query_info;

/**
 * Worker service routine to send serviced queries to authoritative servers.
 * @param qinfo: query info.
 * @param flags: host order flags word, with opcode and CD bit.
 * @param dnssec: if set, EDNS record will have DO bit set.
 * @param want_dnssec: signatures needed.
 * @param nocaps: ignore capsforid(if in config), do not perturb qname.
 * @param addr: where to.
 * @param addrlen: length of addr.
 * @param zone: delegation point name.
 * @param zonelen: length of zone name wireformat dname.
 * @param ssl_upstream: use SSL for upstream queries.
 * @param q: wich query state to reactivate upon return.
 * @return: false on failure (memory or socket related). no query was
 *      sent.
 */
struct outbound_entry* libworker_send_query(struct query_info* qinfo,
	uint16_t flags, int dnssec, int want_dnssec, int nocaps,
	struct sockaddr_storage* addr, socklen_t addrlen, uint8_t* zone,
	size_t zonelen, int ssl_upstream, struct module_qstate* q);

/** process incoming replies from the network */
int libworker_handle_reply(struct comm_point* c, void* arg, int error,
        struct comm_reply* reply_info);

/** process incoming serviced query replies from the network */
int libworker_handle_service_reply(struct comm_point* c, void* arg, int error,
        struct comm_reply* reply_info);

/** handle control command coming into server */
void libworker_handle_control_cmd(struct tube* tube, uint8_t* msg, size_t len,
	int err, void* arg);

/** mesh callback with fg results */
void libworker_fg_done_cb(void* arg, int rcode, sldns_buffer* buf, 
	enum sec_status s, char* why_bogus);

/** mesh callback with bg results */
void libworker_bg_done_cb(void* arg, int rcode, sldns_buffer* buf, 
	enum sec_status s, char* why_bogus);

/** mesh callback with event results */
void libworker_event_done_cb(void* arg, int rcode, struct sldns_buffer* buf, 
	enum sec_status s, char* why_bogus);

/**
 * Worker signal handler function. User argument is the worker itself.
 * @param sig: signal number.
 * @param arg: the worker (main worker) that handles signals.
 */
void worker_sighandler(int sig, void* arg);

/**
 * Worker service routine to send serviced queries to authoritative servers.
 * @param qinfo: query info.
 * @param flags: host order flags word, with opcode and CD bit.
 * @param dnssec: if set, EDNS record will have DO bit set.
 * @param want_dnssec: signatures needed.
 * @param nocaps: ignore capsforid(if in config), do not perturb qname.
 * @param addr: where to.
 * @param addrlen: length of addr.
 * @param zone: wireformat dname of the zone.
 * @param zonelen: length of zone name.
 * @param ssl_upstream: use SSL for upstream queries.
 * @param q: wich query state to reactivate upon return.
 * @return: false on failure (memory or socket related). no query was
 *      sent.
 */
struct outbound_entry* worker_send_query(struct query_info* qinfo,
	uint16_t flags, int dnssec, int want_dnssec, int nocaps,
	struct sockaddr_storage* addr, socklen_t addrlen, uint8_t* zone,
	size_t zonelen, int ssl_upstream, struct module_qstate* q);

/** 
 * process control messages from the main thread. Frees the control 
 * command message.
 * @param tube: tube control message came on.
 * @param msg: message contents.  Is freed.
 * @param len: length of message.
 * @param error: if error (NETEVENT_*) happened.
 * @param arg: user argument
 */
void worker_handle_control_cmd(struct tube* tube, uint8_t* msg, size_t len,
	int error, void* arg);

/** handles callbacks from listening event interface */
int worker_handle_request(struct comm_point* c, void* arg, int error,
	struct comm_reply* repinfo);

/** process incoming replies from the network */
int worker_handle_reply(struct comm_point* c, void* arg, int error, 
	struct comm_reply* reply_info);

/** process incoming serviced query replies from the network */
int worker_handle_service_reply(struct comm_point* c, void* arg, int error, 
	struct comm_reply* reply_info);

/** cleanup the cache to remove all rrset IDs from it, arg is worker */
void worker_alloc_cleanup(void* arg);

/** statistics timer callback handler */
void worker_stat_timer_cb(void* arg);

/** probe timer callback handler */
void worker_probe_timer_cb(void* arg);

/** start accept callback handler */
void worker_start_accept(void* arg);

/** stop accept callback handler */
void worker_stop_accept(void* arg);

/** handle remote control accept callbacks */
int remote_accept_callback(struct comm_point*, void*, int, struct comm_reply*);

/** handle remote control data callbacks */
int remote_control_callback(struct comm_point*, void*, int, struct comm_reply*);

/** routine to printout option values over SSL */
void  remote_get_opt_ssl(char* line, void* arg);

#endif /* LIBUNBOUND_WORKER_H */