summaryrefslogtreecommitdiffstats
path: root/include/conntrackd.h
blob: ce8f9d4651f45abbf2c20d226de96ecadb724919 (plain)
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
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
#ifndef _CONNTRACKD_H_
#define _CONNTRACKD_H_

#include "mcast.h"
#include "local.h"
#include "alarm.h"
#include "filter.h"
#include "channel.h"

#include <stdint.h>
#include <stdio.h>
#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
#include <syslog.h>

/* UNIX facilities */
#define FLUSH_MASTER	0	/* flush kernel conntrack table 	*/
#define RESYNC_MASTER	1	/* resync with kernel conntrack table 	*/
#define DUMP_INTERNAL 	16	/* dump internal cache 			*/
#define DUMP_EXTERNAL 	17	/* dump external cache 			*/
#define COMMIT		18	/* commit external cache		*/
#define FLUSH_CACHE	19	/* flush cache				*/
#define KILL		20	/* kill conntrackd			*/
#define STATS		21	/* dump statistics			*/
#define SEND_BULK	22	/* send a bulk				*/
#define REQUEST_DUMP	23	/* request dump 			*/
#define DUMP_INT_XML	24	/* dump internal cache in XML		*/
#define DUMP_EXT_XML	25	/* dump external cache in XML		*/
#define RESET_TIMERS	26	/* reset kernel timers			*/
#define DEBUG_INFO	27	/* unused				*/
#define STATS_NETWORK	28	/* extended network stats		*/
#define STATS_CACHE	29	/* extended cache stats			*/
#define STATS_RUNTIME	30	/* extended runtime stats		*/
#define STATS_LINK	31	/* dedicated link stats			*/
#define STATS_RSQUEUE	32	/* resend queue stats			*/
#define FLUSH_INT_CACHE	33	/* flush internal cache			*/
#define FLUSH_EXT_CACHE	34	/* flush external cache			*/
#define STATS_PROCESS	35	/* child process stats			*/
#define STATS_QUEUE	36	/* queue stats				*/

#define DEFAULT_CONFIGFILE	"/etc/conntrackd/conntrackd.conf"
#define DEFAULT_LOCKFILE	"/var/lock/conntrackd.lock"
#define DEFAULT_LOGFILE		"/var/log/conntrackd.log"
#define DEFAULT_STATS_LOGFILE	"/var/log/conntrackd-stats.log"
#define DEFAULT_SYSLOG_FACILITY	LOG_DAEMON

/* daemon/request modes */
#define NOT_SET         0
#define DAEMON		1
#define REQUEST		2

/* conntrackd modes */
#define CTD_SYNC_MODE		(1UL << 0)
#define CTD_STATS_MODE		(1UL << 1)
#define CTD_SYNC_FTFW		(1UL << 2)
#define CTD_SYNC_ALARM		(1UL << 3)
#define CTD_SYNC_NOTRACK	(1UL << 4)
#define CTD_POLL		(1UL << 5)

/* FILENAME_MAX is 4096 on my system, perhaps too much? */
#ifndef FILENAME_MAXLEN
#define FILENAME_MAXLEN 256
#endif

union inet_address {
	uint32_t ipv4;
	uint32_t ipv6[4];
	uint32_t all[4];
};

#define CONFIG(x) conf.x

struct ct_conf {
	char logfile[FILENAME_MAXLEN];
	int syslog_facility;
	char lockfile[FILENAME_MAXLEN];
	int hashsize;			/* hashtable size */
	int channel_num;
	int channel_default;
	int channel_type_global;
	struct channel_conf channel[MULTICHANNEL_MAX];
	struct local_conf local;	/* unix socket facilities */
	int nice;
	int limit;
	int refresh;
	int cache_timeout;		/* cache entries timeout */
	int commit_timeout;		/* committed entries timeout */
	unsigned int purge_timeout;	/* purge kernel entries timeout */
	unsigned int netlink_buffer_size;
	unsigned int netlink_buffer_size_max_grown;
	int nl_overrun_resync;
	unsigned int flags;
	int family;			/* protocol family */
	unsigned int resend_queue_size; /* FTFW protocol */
	unsigned int window_size;
	int poll_kernel_secs;
	int filter_from_kernelspace;
	int event_iterations_limit;
	struct {
		int external_cache_disable;
	} sync;
	struct {
		int events_reliable;
	} netlink;
	struct {
		int commit_steps;
	} general;
	struct {
		int type;
		int prio;
	} sched;
	struct {
		char logfile[FILENAME_MAXLEN];
		int syslog_facility;
		size_t buffer_size;
	} stats;
};

#define STATE(x) st.x

struct ct_general_state {
	sigset_t 			block;
	FILE 				*log;
	FILE				*stats_log;
	struct local_server		local;
	struct ct_mode 			*mode;
	struct ct_filter		*us_filter;

	struct nfct_handle		*event;         /* event handler */
	struct nfct_filter		*filter;	/* event filter */
	int				event_iterations_limit;

	struct nfct_handle		*dump;		/* dump handler */
	struct nfct_handle		*resync;	/* resync handler */
	struct nfct_handle		*get;		/* get handler */
	int				get_retval;	/* hackish */
	struct nfct_handle		*flush;		/* flusher */

	struct alarm_block		resync_alarm;
	struct alarm_block		polling_alarm;

	struct fds			*fds;

	/* statistics */
	struct {
		uint64_t 		bytes_orig;
		uint64_t 		bytes_repl;
		uint64_t 		packets_orig;
		uint64_t 		packets_repl;

		time_t			daemon_start_time;

		uint64_t		nl_events_received;
		uint64_t		nl_events_filtered;
		uint32_t		nl_events_unknown_type;
		uint32_t		nl_catch_event_failed;
		uint32_t		nl_overrun;
		uint32_t		nl_dump_unknown_type;
		uint32_t		nl_kernel_table_flush;
		uint32_t		nl_kernel_table_resync;

		uint32_t		child_process_failed;
		uint32_t		child_process_error_segfault;
		uint32_t		child_process_error_term;

		uint32_t		select_failed;
		uint32_t		wait_failed;

		uint32_t		local_read_failed;
		uint32_t		local_unknown_request;

	} stats;
};

#define STATE_SYNC(x) state.sync->x

struct ct_sync_state {
	struct cache *internal; 	/* internal events cache (netlink) */
	struct external_handler *external;

	struct multichannel	*channel;
	struct nlif_handle	*interface;
	struct queue *tx_queue;

#define COMMIT_STATE_INACTIVE	0
#define COMMIT_STATE_MASTER	1
#define COMMIT_STATE_RELATED	2

	struct {
		int			state;
		int			clientfd;
		struct nfct_handle	*h;
		struct evfd		*evfd;
		int			current;
		struct {
			int 		ok;
			int		fail;
			struct timeval	start;
		} stats;
	} commit;

	struct alarm_block		reset_cache_alarm;

	struct sync_mode *sync;		/* sync mode */

	/* statistics */
	struct {
		uint64_t	msg_rcv_malformed;
		uint32_t	msg_rcv_bad_version;
		uint32_t	msg_rcv_bad_payload;
		uint32_t	msg_rcv_bad_header;
		uint32_t	msg_rcv_bad_type;
		uint32_t	msg_rcv_truncated;
		uint32_t	msg_rcv_bad_size;
		uint32_t	msg_snd_malformed;
		uint64_t	msg_rcv_lost;
		uint64_t	msg_rcv_before;
	} error;

	uint32_t last_seq_sent;	/* last sequence number sent */
	uint32_t last_seq_recv;	/* last sequence number recv */
};

#define STATE_STATS(x) state.stats->x

struct ct_stats_state {
	struct cache *cache;            /* internal events cache (netlink) */
};

union ct_state {
	struct ct_sync_state *sync;
	struct ct_stats_state *stats;
};

extern struct ct_conf conf;
extern union ct_state state;
extern struct ct_general_state st;

struct ct_mode {
	int (*init)(void);
	void (*run)(fd_set *readfds);
	int (*local)(int fd, int type, void *data);
	void (*kill)(void);
	void (*dump)(struct nf_conntrack *ct);
	int (*resync)(enum nf_conntrack_msg_type type,
		      struct nf_conntrack *ct,
		      void *data);
	int (*purge)(void);
	void (*event_new)(struct nf_conntrack *ct, int origin);
	void (*event_upd)(struct nf_conntrack *ct, int origin);
	int (*event_dst)(struct nf_conntrack *ct, int origin);
};

/* conntrackd modes */
extern struct ct_mode sync_mode;
extern struct ct_mode stats_mode;

#define MAX(x, y) x > y ? x : y

/* These live in run.c */
void killer(int foo);
int init(void);
void run(void);

/* from read_config_yy.c */
int
init_config(char *filename);

#endif