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/*
* Copyright (C) 1993-2001 by Darren Reed.
*
* See the IPFILTER.LICENCE file for details on licencing.
*
* @(#)ip_fil.h 1.35 6/5/96
* $Id: ip_sync.h,v 2.11.2.4 2006/07/14 06:12:20 darrenr Exp $
*/
#ifndef __IP_SYNC_H__
#define __IP_SYNC_H__
typedef struct synchdr {
u_32_t sm_magic; /* magic */
u_char sm_v; /* version: 4,6 */
u_char sm_p; /* protocol */
u_char sm_cmd; /* command */
u_char sm_table; /* NAT, STATE, etc */
u_int sm_num; /* table entry number */
int sm_rev; /* forward/reverse */
int sm_len; /* length of the data section */
struct synclist *sm_sl; /* back pointer to parent */
} synchdr_t;
#define SYNHDRMAGIC 0x0FF51DE5
/*
* Commands
* No delete required as expirey will take care of that!
*/
#define SMC_CREATE 0 /* pass ipstate_t after synchdr_t */
#define SMC_UPDATE 1
#define SMC_MAXCMD 1
/*
* Tables
*/
#define SMC_NAT 0
#define SMC_STATE 1
#define SMC_MAXTBL 1
/*
* Only TCP requires "more" information than just a reference to the entry
* for which an update is being made.
*/
typedef struct synctcp_update {
u_long stu_age;
tcpdata_t stu_data[2];
int stu_state[2];
} synctcp_update_t;
typedef struct synclist {
struct synclist *sl_next;
struct synclist **sl_pnext;
int sl_idx; /* update index */
struct synchdr sl_hdr;
union {
struct ipstate *slu_ips;
struct nat *slu_ipn;
void *slu_ptr;
} sl_un;
} synclist_t;
#define sl_ptr sl_un.slu_ptr
#define sl_ips sl_un.slu_ips
#define sl_ipn sl_un.slu_ipn
#define sl_magic sl_hdr.sm_magic
#define sl_v sl_hdr.sm_v
#define sl_p sl_hdr.sm_p
#define sl_cmd sl_hdr.sm_cmd
#define sl_rev sl_hdr.sm_rev
#define sl_table sl_hdr.sm_table
#define sl_num sl_hdr.sm_num
#define sl_len sl_hdr.sm_len
/*
* NOTE: SYNCLOG_SZ is defined *low*. It should be the next power of two
* up for whatever number of packets per second you expect to see. Be
* warned: this index's a table of large elements (upto 272 bytes in size
* each), and thus a size of 8192, for example, results in a 2MB table.
* The lesson here is not to use small machines for running fast firewalls
* (100BaseT) in sync, where you might have upwards of 10k pps.
*/
#define SYNCLOG_SZ 256
typedef struct synclogent {
struct synchdr sle_hdr;
union {
struct ipstate sleu_ips;
struct nat sleu_ipn;
} sle_un;
} synclogent_t;
typedef struct syncupdent { /* 28 or 32 bytes */
struct synchdr sup_hdr;
struct synctcp_update sup_tcp;
} syncupdent_t;
extern synclogent_t synclog[SYNCLOG_SZ];
extern int fr_sync_ioctl __P((caddr_t, ioctlcmd_t, int, int, void *));
extern synclist_t *ipfsync_new __P((int, fr_info_t *, void *));
extern void ipfsync_del __P((synclist_t *));
extern void ipfsync_update __P((int, fr_info_t *, synclist_t *));
extern int ipfsync_init __P((void));
extern int ipfsync_nat __P((synchdr_t *sp, void *data));
extern int ipfsync_state __P((synchdr_t *sp, void *data));
extern int ipfsync_read __P((struct uio *uio));
extern int ipfsync_write __P((struct uio *uio));
extern int ipfsync_canread __P((void));
extern int ipfsync_canwrite __P((void));
#endif /* IP_SYNC */