1 /******************************************************************************/
2 /* pfixtools: a collection of postfix related tools */
4 /* ________________________________________________________________________ */
6 /* Redistribution and use in source and binary forms, with or without */
7 /* modification, are permitted provided that the following conditions */
10 /* 1. Redistributions of source code must retain the above copyright */
11 /* notice, this list of conditions and the following disclaimer. */
12 /* 2. Redistributions in binary form must reproduce the above copyright */
13 /* notice, this list of conditions and the following disclaimer in the */
14 /* documentation and/or other materials provided with the distribution. */
15 /* 3. The names of its contributors may not be used to endorse or promote */
16 /* products derived from this software without specific prior written */
19 /* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND */
20 /* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE */
21 /* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR */
22 /* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS */
23 /* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR */
24 /* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF */
25 /* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS */
26 /* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN */
27 /* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) */
28 /* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF */
29 /* THE POSSIBILITY OF SUCH DAMAGE. */
30 /******************************************************************************/
33 * Copyright © 2008 Florent Bruneau
40 typedef struct counter_config_t {
42 uint32_t hard_threshold;
43 uint32_t soft_threshold;
47 static counter_config_t *counter_config_new(void)
49 return p_new(counter_config_t, 1);
52 static void counter_config_delete(counter_config_t **config)
59 static bool counter_filter_constructor(filter_t *filter)
61 counter_config_t *config = counter_config_new();
64 #define PARSE_CHECK(Expr, Str, ...) \
66 err(Str, ##__VA_ARGS__); \
67 counter_config_delete(&config); \
71 foreach (filter_param_t *param, filter->params) {
72 switch (param->type) {
73 FILTER_PARAM_PARSE_INT(COUNTER, config->counter);
74 FILTER_PARAM_PARSE_INT(HARD_THRESHOLD, config->hard_threshold);
75 FILTER_PARAM_PARSE_INT(SOFT_THRESHOLD, config->soft_threshold);
80 PARSE_CHECK(config->counter >= 0 && config->counter < MAX_COUNTERS,
81 "invalid counter number: %d", config->counter);
82 filter->data = config;
86 static void counter_filter_destructor(filter_t *filter)
88 counter_config_t *config = filter->data;
89 counter_config_delete(&config);
90 filter->data = config;
93 static filter_result_t counter_filter(const filter_t *filter, const query_t *query,
94 filter_context_t *context)
96 const counter_config_t *counter = filter->data;
97 const uint32_t val = context->counters[counter->counter];
99 if (val >= counter->hard_threshold) {
100 return HTK_HARD_MATCH;
101 } else if (val >= counter->soft_threshold) {
102 return HTK_SOFT_MATCH;
108 static int counter_init(void)
110 filter_type_t type = filter_register("counter", counter_filter_constructor,
111 counter_filter_destructor, counter_filter,
115 (void)filter_hook_register(type, "fail");
116 (void)filter_hook_register(type, "hard_match");
117 (void)filter_hook_register(type, "soft_match");
121 (void)filter_param_register(type, "counter");
122 (void)filter_param_register(type, "hard_threshold");
123 (void)filter_param_register(type, "soft_threshold");
126 module_init(counter_init);