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/* $OpenBSD: if_pfsync.h,v 1.3 2003/11/08 00:45:34 mcbride Exp $ */
/*
* Copyright (c) 2001 Michael Shalayeff
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _NET_IF_PFSYNC_H_
#define _NET_IF_PFSYNC_H_
#ifdef _KERNEL
struct pfsync_softc {
struct ifnet sc_if;
struct timeout sc_tmo;
struct mbuf *sc_mbuf; /* current cummulative mbuf */
struct pf_state *sc_ptr; /* current ongoing state */
int sc_count; /* number of states in one mtu */
};
#endif
struct pfsync_header {
u_int8_t version;
#define PFSYNC_VERSION 1
u_int8_t af;
u_int8_t action;
#define PFSYNC_ACT_CLR 0
#define PFSYNC_ACT_INS 1
#define PFSYNC_ACT_UPD 2
#define PFSYNC_ACT_DEL 3
#define PFSYNC_ACT_MAX 4
u_int8_t count;
};
#define PFSYNC_HDRLEN sizeof(struct pfsync_header)
#define PFSYNC_ACTIONS \
"CLR ST", "INS ST", "UPD ST", "DEL ST"
#define pf_state_peer_hton(s,d) do { \
(d)->seqlo = htonl((s)->seqlo); \
(d)->seqhi = htonl((s)->seqhi); \
(d)->seqdiff = htonl((s)->seqdiff); \
(d)->max_win = htons((s)->max_win); \
(d)->state = (s)->state; \
} while (0)
#define pf_state_peer_ntoh(s,d) do { \
(d)->seqlo = ntohl((s)->seqlo); \
(d)->seqhi = ntohl((s)->seqhi); \
(d)->seqdiff = ntohl((s)->seqdiff); \
(d)->max_win = ntohs((s)->max_win); \
(d)->state = (s)->state; \
} while (0)
#ifdef _KERNEL
int pfsync_clear_state(struct pf_state *);
int pfsync_pack_state(u_int8_t, struct pf_state *);
#define pfsync_insert_state(st) do { \
if (!(st->rule.ptr->rule_flag & PFRULE_NOSYNC)) \
pfsync_pack_state(PFSYNC_ACT_INS, (st));\
} while (0)
#define pfsync_update_state(st) do { \
if (!(st->rule.ptr->rule_flag & PFRULE_NOSYNC)) \
pfsync_pack_state(PFSYNC_ACT_UPD, (st));\
} while (0)
#define pfsync_delete_state(st) do { \
if (!(st->rule.ptr->rule_flag & PFRULE_NOSYNC)) \
pfsync_pack_state(PFSYNC_ACT_DEL, (st));\
} while (0)
#endif
#endif /* _NET_IF_PFSYNC_H_ */
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