bus->listen() and the controller wrappers accept a timeout to wait for callbacks
[strongswan.git] / src / libcharon / control / controller.h
1 /*
2 * Copyright (C) 2007 Martin Willi
3 * Hochschule fuer Technik Rapperswil
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
12 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * for more details.
14 */
15
16 /**
17 * @defgroup controller_i controller
18 * @{ @ingroup control
19 */
20
21 #ifndef CONTROLLER_H_
22 #define CONTROLLER_H_
23
24 #include <bus/bus.h>
25
26 /**
27 * callback to log things triggered by controller.
28 *
29 * @param param echoed parameter supplied when function invoked
30 * @param group debugging group
31 * @param level verbosity level if log
32 * @param ike_sa associated IKE_SA, if any
33 * @param format printf like format string
34 * @param args list of arguments to use for format
35 * @return FALSE to return from invoked function
36 */
37 typedef bool(*controller_cb_t)(void* param, debug_t group, level_t level,
38 ike_sa_t* ike_sa, char* format, va_list args);
39
40 /**
41 * Empty callback function for controller_t functions.
42 *
43 * If you want to do a synchronous call, but don't need a callback, pass
44 * this function to the controllers methods.
45 */
46 bool controller_cb_empty(void *param, debug_t group, level_t level,
47 ike_sa_t *ike_sa, char *format, va_list args);
48
49 typedef struct controller_t controller_t;
50
51 /**
52 * The controller provides a simple interface to run actions.
53 *
54 * The controller starts actions by creating jobs. It then tries to
55 * evaluate the result of the operation by listening on the bus.
56 *
57 * Passing NULL as callback to the managers function calls them asynchronously.
58 * If a callback is specified, they are called synchronously. There is a default
59 * callback "controller_cb_empty" if you want to call a function
60 * synchronously, but don't need a callback.
61 */
62 struct controller_t {
63
64 /**
65 * Create an enumerator for all IKE_SAs.
66 *
67 * The enumerator blocks the IKE_SA manager until it gets destroyed. Do
68 * not call another interface/manager method while the enumerator is alive.
69 *
70 * @param wait TRUE to wait for checked out SAs, FALSE to skip
71 * @return enumerator, locks IKE_SA manager until destroyed
72 */
73 enumerator_t* (*create_ike_sa_enumerator)(controller_t *this, bool wait);
74
75 /**
76 * Initiate a CHILD_SA, and if required, an IKE_SA.
77 *
78 * The initiate() function is synchronous and thus blocks until the
79 * IKE_SA is established or failed. Because of this, the initiate() function
80 * contains a thread cancellation point.
81 *
82 * @param peer_cfg peer_cfg to use for IKE_SA setup
83 * @param child_cfg child_cfg to set up CHILD_SA from
84 * @param cb logging callback
85 * @param param parameter to include in each call of cb
86 * @param timeout timeout in ms to wait for callbacks, 0 to disable
87 * @return
88 * - SUCCESS, if CHILD_SA established
89 * - FAILED, if setup failed
90 * - NEED_MORE, if callback returned FALSE
91 * - OUT_OF_RES if timed out
92 */
93 status_t (*initiate)(controller_t *this,
94 peer_cfg_t *peer_cfg, child_cfg_t *child_cfg,
95 controller_cb_t callback, void *param, u_int timeout);
96
97 /**
98 * Terminate an IKE_SA and all of its CHILD_SAs.
99 *
100 * The terminate() function is synchronous and thus blocks until the
101 * IKE_SA is properly deleted, or the delete timed out.
102 * The terminate() function contains a thread cancellation point.
103 *
104 * @param unique_id unique id of the IKE_SA to terminate.
105 * @param cb logging callback
106 * @param param parameter to include in each call of cb
107 * @param timeout timeout in ms to wait for callbacks, 0 to disable
108 * @return
109 * - SUCCESS, if CHILD_SA terminated
110 * - NOT_FOUND, if no such CHILD_SA found
111 * - NEED_MORE, if callback returned FALSE
112 * - OUT_OF_RES if timed out
113 */
114 status_t (*terminate_ike)(controller_t *this, u_int32_t unique_id,
115 controller_cb_t callback, void *param,
116 u_int timeout);
117
118 /**
119 * Terminate a CHILD_SA.
120 *
121 * @param reqid reqid of the CHILD_SA to terminate
122 * @param cb logging callback
123 * @param param parameter to include in each call of cb
124 * @param timeout timeout in ms to wait for callbacks, 0 to disable
125 * @return
126 * - SUCCESS, if CHILD_SA terminated
127 * - NOT_FOUND, if no such CHILD_SA found
128 * - NEED_MORE, if callback returned FALSE
129 * - OUT_OF_RES if timed out
130 */
131 status_t (*terminate_child)(controller_t *this, u_int32_t reqid,
132 controller_cb_t callback, void *param,
133 u_int timeout);
134
135 /**
136 * Destroy a controller_t instance.
137 */
138 void (*destroy) (controller_t *this);
139 };
140
141
142 /**
143 * Creates a controller instance.
144 *
145 * @return controller_t object
146 */
147 controller_t *controller_create(void);
148
149 #endif /** CONTROLLER_H_ @}*/