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1.1 misho 1: /*
2: * Copyright (C) 2014 Martin Willi
3: * Copyright (C) 2014 revosec AG
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: #include "vici_logger.h"
17: #include "vici_builder.h"
18:
19: #include <daemon.h>
20: #include <threading/mutex.h>
21: #include <processing/jobs/callback_job.h>
22:
23: typedef struct private_vici_logger_t private_vici_logger_t;
24:
25: /**
26: * Private data of an vici_logger_t object.
27: */
28: struct private_vici_logger_t {
29:
30: /**
31: * Public vici_logger_t interface.
32: */
33: vici_logger_t public;
34:
35: /**
36: * Dispatcher
37: */
38: vici_dispatcher_t *dispatcher;
39:
40: /**
41: * Recursiveness avoidance counter
42: */
43: int recursive;
44:
45: /**
46: * List of messages to raise async events
47: */
48: linked_list_t *queue;
49:
50: /**
51: * Mutex to synchronize logging
52: */
53: mutex_t *mutex;
54: };
55:
56: /**
57: * Async callback to raise events for queued messages
58: */
59: static job_requeue_t raise_events(private_vici_logger_t *this)
60: {
61: vici_message_t *message;
62: u_int count;
63:
64: this->mutex->lock(this->mutex);
65: count = this->queue->get_count(this->queue);
66: this->queue->remove_first(this->queue, (void**)&message);
67: this->mutex->unlock(this->mutex);
68:
69: if (count > 0)
70: {
71: this->dispatcher->raise_event(this->dispatcher, "log", 0, message);
72: }
73: if (count > 1)
74: {
75: return JOB_REQUEUE_DIRECT;
76: }
77: return JOB_REQUEUE_NONE;
78: }
79:
80: /**
81: * Queue a message for async processing
82: */
83: static void queue_message(private_vici_logger_t *this, vici_message_t *message)
84: {
85: this->queue->insert_last(this->queue, message);
86: if (this->queue->get_count(this->queue) == 1)
87: {
88: lib->processor->queue_job(lib->processor, (job_t*)
89: callback_job_create((callback_job_cb_t)raise_events,
90: this, NULL, NULL));
91: }
92: }
93:
94: METHOD(logger_t, log_, void,
95: private_vici_logger_t *this, debug_t group, level_t level, int thread,
96: ike_sa_t* ike_sa, const char *msg)
97: {
98: if (!this->dispatcher->has_event_listeners(this->dispatcher, "log"))
99: {
100: return;
101: }
102:
103: this->mutex->lock(this->mutex);
104:
105: /* avoid recursive invocations by the vici subsystem */
106: if (this->recursive++ == 0)
107: {
108: vici_message_t *message;
109: vici_builder_t *builder;
110:
111: builder = vici_builder_create();
112: builder->add_kv(builder, "group", "%N", debug_names, group);
113: builder->add_kv(builder, "level", "%d", level);
114: builder->add_kv(builder, "thread", "%d", thread);
115: if (ike_sa)
116: {
117: builder->add_kv(builder, "ikesa-name", "%s",
118: ike_sa->get_name(ike_sa));
119: builder->add_kv(builder, "ikesa-uniqueid", "%u",
120: ike_sa->get_unique_id(ike_sa));
121: }
122: builder->add_kv(builder, "msg", "%s", msg);
123:
124: message = builder->finalize(builder);
125: if (message)
126: {
127: queue_message(this, message);
128: }
129: }
130: this->recursive--;
131:
132: this->mutex->unlock(this->mutex);
133: }
134:
135: METHOD(logger_t, get_level, level_t,
136: private_vici_logger_t *this, debug_t group)
137: {
138: /* anything higher might produce a loop as sending messages or listening
139: * for clients might cause log messages itself */
140: return LEVEL_CTRL;
141: }
142:
143: /**
144: * (Un-)register dispatcher functions/events
145: */
146: static void manage_commands(private_vici_logger_t *this, bool reg)
147: {
148: this->dispatcher->manage_event(this->dispatcher, "log", reg);
149: }
150:
151: METHOD(vici_logger_t, destroy, void,
152: private_vici_logger_t *this)
153: {
154: manage_commands(this, FALSE);
155: this->queue->destroy_offset(this->queue, offsetof(vici_message_t, destroy));
156: this->mutex->destroy(this->mutex);
157: free(this);
158: }
159:
160: /**
161: * See header
162: */
163: vici_logger_t *vici_logger_create(vici_dispatcher_t *dispatcher)
164: {
165: private_vici_logger_t *this;
166:
167: INIT(this,
168: .public = {
169: .logger = {
170: .log = _log_,
171: .get_level = _get_level,
172: },
173: .destroy = _destroy,
174: },
175: .dispatcher = dispatcher,
176: .queue = linked_list_create(),
177: .mutex = mutex_create(MUTEX_TYPE_RECURSIVE),
178: );
179:
180: manage_commands(this, TRUE);
181:
182: return &this->public;
183: }