85 lines
2.8 KiB
C
85 lines
2.8 KiB
C
/* $OpenBSD: if_pfsync.h,v 1.2 2002/12/11 18:31:26 mickey Exp $ */
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/*
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* Copyright (c) 2001 Michael Shalayeff
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _NET_IF_PFSYNC_H_
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#define _NET_IF_PFSYNC_H_
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#ifdef _KERNEL
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struct pfsync_softc {
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struct ifnet sc_if;
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struct timeout sc_tmo;
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struct mbuf *sc_mbuf; /* current cummulative mbuf */
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struct pf_state *sc_ptr; /* current ongoing state */
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int sc_count; /* number of states in one mtu */
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};
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#endif
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struct pfsync_header {
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u_int8_t version;
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#define PFSYNC_VERSION 1
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u_int8_t af;
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u_int8_t action;
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#define PFSYNC_ACT_CLR 0
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#define PFSYNC_ACT_INS 1
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#define PFSYNC_ACT_UPD 2
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#define PFSYNC_ACT_DEL 3
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#define PFSYNC_ACT_MAX 4
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u_int8_t count;
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};
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#define PFSYNC_HDRLEN sizeof(struct pfsync_header)
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#define PFSYNC_ACTIONS \
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"CLR ST", "INS ST", "UPD ST", "DEL ST"
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#define pf_state_peer_hton(s,d) do { \
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(d)->seqlo = htonl((s)->seqlo); \
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(d)->seqhi = htonl((s)->seqhi); \
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(d)->seqdiff = htonl((s)->seqdiff); \
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(d)->max_win = htons((s)->max_win); \
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(d)->state = (s)->state; \
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} while (0)
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#define pf_state_peer_ntoh(s,d) do { \
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(d)->seqlo = ntohl((s)->seqlo); \
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(d)->seqhi = ntohl((s)->seqhi); \
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(d)->seqdiff = ntohl((s)->seqdiff); \
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(d)->max_win = ntohs((s)->max_win); \
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(d)->state = (s)->state; \
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} while (0)
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#ifdef _KERNEL
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int pfsync_clear_state(struct pf_state *);
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int pfsync_pack_state(u_int8_t, struct pf_state *);
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#define pfsync_insert_state(st) pfsync_pack_state(PFSYNC_ACT_INS, (st))
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#define pfsync_update_state(st) pfsync_pack_state(PFSYNC_ACT_UPD, (st))
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#define pfsync_delete_state(st) pfsync_pack_state(PFSYNC_ACT_DEL, (st))
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#endif
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#endif /* _NET_IF_PFSYNC_H_ */
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