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#ifndef _CONNTRACKD_H_
#define _CONNTRACKD_H_
#include "mcast.h"
#include "local.h"
#include <stdio.h>
#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
#include "cache.h"
#include "debug.h"
#include <signal.h>
#include "state_helper.h"
#include "linux_list.h"
#include <libnetfilter_conntrack/libnetfilter_conntrack_tcp.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 DEFAULT_CONFIGFILE "/etc/conntrackd/conntrackd.conf"
#define DEFAULT_LOCKFILE "/var/lock/conntrackd.lock"
enum {
SYNC_MODE_PERSISTENT_BIT = 0,
SYNC_MODE_PERSISTENT = (1 << SYNC_MODE_PERSISTENT_BIT),
SYNC_MODE_NACK_BIT = 1,
SYNC_MODE_NACK = (1 << SYNC_MODE_NACK_BIT),
DONT_CHECKSUM_BIT = 2,
DONT_CHECKSUM = (1 << DONT_CHECKSUM_BIT),
};
/* daemon/request modes */
#define NOT_SET 0
#define DAEMON 1
#define REQUEST 2
/* conntrackd modes */
#define SYNC_MODE 0
#define STATS_MODE 1
/* FILENAME_MAX is 4096 on my system, perhaps too much? */
#ifndef FILENAME_MAXLEN
#define FILENAME_MAXLEN 256
#endif
union inet_address {
u_int32_t ipv4;
u_int32_t ipv6[4];
u_int32_t all[4];
};
#define CONFIG(x) conf.x
struct ct_conf {
char logfile[FILENAME_MAXLEN];
char lockfile[FILENAME_MAXLEN];
int hashsize; /* hashtable size */
struct mcast_conf mcast; /* multicast settings */
struct local_conf local; /* unix socket facilities */
int limit;
int refresh;
int cache_timeout; /* cache entries timeout */
int commit_timeout; /* committed entries timeout */
unsigned int netlink_buffer_size;
unsigned int netlink_buffer_size_max_grown;
unsigned char ignore_protocol[IPPROTO_MAX];
union inet_address *listen_to;
unsigned int listen_to_len;
unsigned int flags;
int family; /* protocol family */
unsigned int resend_buffer_size;/* NACK protocol */
unsigned int window_size;
};
#define STATE(x) st.x
struct ct_general_state {
sigset_t block;
FILE *log;
int local;
struct ct_mode *mode;
struct ignore_pool *ignore_pool;
struct nfct_handle *event; /* event handler */
struct nfct_handle *dump; /* dump handler */
/* statistics */
u_int64_t malformed;
u_int64_t bytes[NFCT_DIR_MAX];
u_int64_t packets[NFCT_DIR_MAX];
};
#define STATE_SYNC(x) state.sync->x
struct ct_sync_state {
struct cache *internal; /* internal events cache (netlink) */
struct cache *external; /* external events cache (mcast) */
struct mcast_sock *mcast_server; /* multicast socket: incoming */
struct mcast_sock *mcast_client; /* multicast socket: outgoing */
struct sync_mode *sync; /* sync mode */
u_int32_t last_seq_sent; /* last sequence number sent */
u_int32_t last_seq_recv; /* last sequence number recv */
u_int64_t packets_replayed; /* number of replayed packets */
u_int64_t packets_lost; /* lost packets: sequence tracking */
};
#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;
#ifndef IPPROTO_VRRP
#define IPPROTO_VRRP 112
#endif
#define STEPS_PER_SECONDS 5
struct ct_mode {
int (*init)(void);
int (*add_fds_to_set)(fd_set *readfds);
void (*run)(fd_set *readfds, int step);
int (*local)(int fd, int type, void *data);
void (*kill)(void);
void (*dump)(struct nf_conntrack *ct);
void (*overrun)(void);
void (*event_new)(struct nf_conntrack *ct);
void (*event_upd)(struct nf_conntrack *ct);
int (*event_dst)(struct nf_conntrack *ct);
};
/* conntrackd modes */
extern struct ct_mode sync_mode;
extern struct ct_mode stats_mode;
#define MAX(x, y) x > y ? x : y
#endif
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