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
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
/*
* (C) 2006-2011 by Pablo Neira Ayuso <pablo@netfilter.org>
* (C) 2011 by Vyatta Inc. <http://www.vyatta.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "netlink.h"
#include "traffic_stats.h"
#include "cache.h"
#include "log.h"
#include "conntrackd.h"
#include "internal.h"
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
static int init_stats(void)
{
state.stats = malloc(sizeof(struct ct_stats_state));
if (!state.stats) {
dlog(LOG_ERR, "can't allocate memory for stats");
return -1;
}
memset(state.stats, 0, sizeof(struct ct_stats_state));
STATE_STATS(cache) = cache_create("stats", CACHE_T_CT,
NO_FEATURES, NULL,
&cache_stats_ct_ops);
if (!STATE_STATS(cache)) {
dlog(LOG_ERR, "can't allocate memory for the "
"external cache");
free(state.stats);
return -1;
}
return 0;
}
static void kill_stats(void)
{
cache_destroy(STATE_STATS(cache));
}
/* handler for requests coming via UNIX socket */
static int local_handler_stats(int fd, int type, void *data)
{
int ret = LOCAL_RET_OK;
switch(type) {
case DUMP_INTERNAL:
cache_dump(STATE_STATS(cache), fd, NFCT_O_PLAIN);
break;
case DUMP_INT_XML:
cache_dump(STATE_STATS(cache), fd, NFCT_O_XML);
break;
case FLUSH_CACHE:
case FLUSH_INT_CACHE:
dlog(LOG_NOTICE, "flushing caches");
cache_flush(STATE_STATS(cache));
break;
case KILL:
killer(0);
break;
case STATS:
cache_stats(STATE_STATS(cache), fd);
dump_traffic_stats(fd);
break;
case STATS_CACHE:
cache_stats_extended(STATE_STATS(cache), fd);
break;
default:
ret = 0;
break;
}
return ret;
}
static void stats_populate(struct nf_conntrack *ct)
{
nfct_attr_unset(ct, ATTR_ORIG_COUNTER_BYTES);
nfct_attr_unset(ct, ATTR_ORIG_COUNTER_PACKETS);
nfct_attr_unset(ct, ATTR_REPL_COUNTER_BYTES);
nfct_attr_unset(ct, ATTR_REPL_COUNTER_PACKETS);
nfct_attr_unset(ct, ATTR_TIMEOUT);
nfct_attr_unset(ct, ATTR_USE);
cache_update_force(STATE_STATS(cache), ct);
}
static int stats_resync(enum nf_conntrack_msg_type type,
struct nf_conntrack *ct,
void *data)
{
if (ct_filter_conntrack(ct, 1))
return NFCT_CB_CONTINUE;
/* This is required by kernels < 2.6.20 */
nfct_attr_unset(ct, ATTR_TIMEOUT);
nfct_attr_unset(ct, ATTR_ORIG_COUNTER_BYTES);
nfct_attr_unset(ct, ATTR_ORIG_COUNTER_PACKETS);
nfct_attr_unset(ct, ATTR_REPL_COUNTER_BYTES);
nfct_attr_unset(ct, ATTR_REPL_COUNTER_PACKETS);
nfct_attr_unset(ct, ATTR_USE);
cache_update_force(STATE_STATS(cache), ct);
return NFCT_CB_CONTINUE;
}
static int purge_step(void *data1, void *data2)
{
struct cache_object *obj = data2;
STATE(get_retval) = 0;
nl_get_conntrack(STATE(get), obj->ptr); /* modifies STATE(get_retval) */
if (!STATE(get_retval)) {
cache_del(STATE_STATS(cache), obj);
dlog_ct(STATE(stats_log), obj->ptr, NFCT_O_PLAIN);
cache_object_free(obj);
}
return 0;
}
static void stats_purge(void)
{
cache_iterate(STATE_STATS(cache), NULL, purge_step);
}
static void stats_event_new(struct nf_conntrack *ct, int origin)
{
int id;
struct cache_object *obj;
nfct_attr_unset(ct, ATTR_TIMEOUT);
obj = cache_find(STATE_STATS(cache), ct, &id);
if (obj == NULL) {
obj = cache_object_new(STATE_STATS(cache), ct);
if (obj == NULL)
return;
if (cache_add(STATE_STATS(cache), obj, id) == -1) {
cache_object_free(obj);
return;
}
}
return;
}
static void stats_event_upd(struct nf_conntrack *ct, int origin)
{
nfct_attr_unset(ct, ATTR_TIMEOUT);
cache_update_force(STATE_STATS(cache), ct);
}
static int stats_event_del(struct nf_conntrack *ct, int origin)
{
int id;
struct cache_object *obj;
nfct_attr_unset(ct, ATTR_TIMEOUT);
obj = cache_find(STATE_STATS(cache), ct, &id);
if (obj) {
cache_del(STATE_STATS(cache), obj);
dlog_ct(STATE(stats_log), ct, NFCT_O_PLAIN);
cache_object_free(obj);
return 1;
}
return 0;
}
static struct internal_handler internal_cache_stats = {
.flags = INTERNAL_F_POPULATE | INTERNAL_F_RESYNC,
.ct = {
.populate = stats_populate,
.resync = stats_resync,
.purge = stats_purge,
.new = stats_event_new,
.upd = stats_event_upd,
.del = stats_event_del,
},
};
struct ct_mode stats_mode = {
.init = init_stats,
.run = NULL,
.local = local_handler_stats,
.kill = kill_stats,
.internal = &internal_cache_stats,
};
|
