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
|
/*
* Copyright (c) 2002-2013 Balabit
* Copyright (c) 1998-2013 Balázs Scheidler
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*
*/
#include "filter/filter-pipe.h"
#include "stats/stats-registry.h"
/*******************************************************************
* LogFilterPipe
*******************************************************************/
static gboolean
log_filter_pipe_init(LogPipe *s)
{
LogFilterPipe *self = (LogFilterPipe *) s;
GlobalConfig *cfg = log_pipe_get_config(s);
if (!filter_expr_init(self->expr, cfg))
return FALSE;
if (!self->name)
self->name = cfg_tree_get_rule_name(&cfg->tree, ENC_FILTER, s->expr_node);
stats_lock();
StatsClusterKey sc_key;
StatsClusterLabel labels[] = { stats_cluster_label("id", self->name) };
stats_cluster_logpipe_key_set(&sc_key, "filtered_events_total", labels, G_N_ELEMENTS(labels));
stats_cluster_logpipe_key_add_legacy_alias(&sc_key, SCS_FILTER, self->name, NULL );
stats_register_counter(1, &sc_key, SC_TYPE_MATCHED, &self->matched);
stats_register_counter(1, &sc_key, SC_TYPE_NOT_MATCHED, &self->not_matched);
stats_unlock();
return TRUE;
}
static void
log_filter_pipe_queue(LogPipe *s, LogMessage *msg, const LogPathOptions *path_options)
{
LogFilterPipe *self = (LogFilterPipe *) s;
gboolean res;
msg_trace(">>>>>> filter rule evaluation begin",
evt_tag_str("rule", self->name),
log_pipe_location_tag(s),
evt_tag_msg_reference(msg));
res = filter_expr_eval_root(self->expr, &msg, path_options);
msg_trace("<<<<<< filter rule evaluation result",
evt_tag_str("result", res ? "matched" : "unmatched"),
evt_tag_str("rule", self->name),
log_pipe_location_tag(s),
evt_tag_msg_reference(msg));
if (res)
{
log_pipe_forward_msg(s, msg, path_options);
stats_counter_inc(self->matched);
}
else
{
if (path_options->matched)
(*path_options->matched) = FALSE;
log_msg_drop(msg, path_options, AT_PROCESSED);
stats_counter_inc(self->not_matched);
}
}
static LogPipe *
log_filter_pipe_clone(LogPipe *s)
{
LogFilterPipe *self = (LogFilterPipe *) s;
FilterExprNode *expr = filter_expr_clone(self->expr);
LogPipe *cloned = log_filter_pipe_new(expr, s->cfg);
((LogFilterPipe *)cloned)->name = g_strdup(self->name);
return cloned;
}
static void
log_filter_pipe_free(LogPipe *s)
{
LogFilterPipe *self = (LogFilterPipe *) s;
stats_lock();
StatsClusterKey sc_key;
StatsClusterLabel labels[] = { stats_cluster_label("id", self->name) };
stats_cluster_logpipe_key_set(&sc_key, "filtered_events_total", labels, G_N_ELEMENTS(labels));
stats_cluster_logpipe_key_add_legacy_alias(&sc_key, SCS_FILTER, self->name, NULL );
stats_unregister_counter(&sc_key, SC_TYPE_MATCHED, &self->matched);
stats_unregister_counter(&sc_key, SC_TYPE_NOT_MATCHED, &self->not_matched);
stats_unlock();
g_free(self->name);
filter_expr_unref(self->expr);
log_pipe_free_method(s);
}
LogPipe *
log_filter_pipe_new(FilterExprNode *expr, GlobalConfig *cfg)
{
LogFilterPipe *self = g_new0(LogFilterPipe, 1);
log_pipe_init_instance(&self->super, cfg);
self->super.flags |= PIF_CONFIG_RELATED + PIF_SYNC_FILTERX;
self->super.init = log_filter_pipe_init;
self->super.queue = log_filter_pipe_queue;
self->super.free_fn = log_filter_pipe_free;
self->super.clone = log_filter_pipe_clone;
self->expr = expr;
return &self->super;
}
|
