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/* $OpenBSD: if_pfsync.h,v 1.35 2008/06/29 08:42:15 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_
#define PFSYNC_ID_LEN sizeof(u_int64_t)
struct pfsync_tdb {
u_int32_t spi;
union sockaddr_union dst;
u_int32_t rpl;
u_int64_t cur_bytes;
u_int8_t sproto;
u_int8_t updates;
u_int8_t pad[2];
} __packed;
struct pfsync_state_upd {
u_int32_t id[2];
struct pfsync_state_peer src;
struct pfsync_state_peer dst;
u_int32_t creatorid;
u_int32_t expire;
u_int8_t timeout;
u_int8_t updates;
u_int8_t pad[6];
} __packed;
struct pfsync_state_del {
u_int32_t id[2];
u_int32_t creatorid;
struct {
u_int8_t state;
} src;
struct {
u_int8_t state;
} dst;
u_int8_t pad[2];
} __packed;
struct pfsync_state_upd_req {
u_int32_t id[2];
u_int32_t creatorid;
u_int32_t pad;
} __packed;
struct pfsync_state_clr {
char ifname[IFNAMSIZ];
u_int32_t creatorid;
u_int32_t pad;
} __packed;
struct pfsync_state_bus {
u_int32_t creatorid;
u_int32_t endtime;
u_int8_t status;
#define PFSYNC_BUS_START 1
#define PFSYNC_BUS_END 2
u_int8_t pad[7];
} __packed;
/*
* Names for PFSYNC sysctl objects
*/
#define PFSYNCCTL_STATS 1 /* PFSYNC stats */
#define PFSYNCCTL_MAXID 2
#define PFSYNCCTL_NAMES { \
{ 0, 0 }, \
{ "stats", CTLTYPE_STRUCT }, \
}
#ifdef _KERNEL
union sc_statep {
struct pfsync_state *s;
struct pfsync_state_upd *u;
struct pfsync_state_del *d;
struct pfsync_state_clr *c;
struct pfsync_state_bus *b;
struct pfsync_state_upd_req *r;
};
union sc_tdb_statep {
struct pfsync_tdb *t;
};
extern int pfsync_sync_ok;
struct pfsync_softc {
struct ifnet sc_if;
struct ifnet *sc_sync_ifp;
struct ip_moptions sc_imo;
struct timeout sc_tmo;
struct timeout sc_tdb_tmo;
struct timeout sc_bulk_tmo;
struct timeout sc_bulkfail_tmo;
struct in_addr sc_sync_peer;
struct in_addr sc_sendaddr;
struct mbuf *sc_mbuf; /* current cumulative mbuf */
struct mbuf *sc_mbuf_net; /* current cumulative mbuf */
struct mbuf *sc_mbuf_tdb; /* dito for TDB updates */
union sc_statep sc_statep;
union sc_statep sc_statep_net;
union sc_tdb_statep sc_statep_tdb;
u_int32_t sc_ureq_received;
u_int32_t sc_ureq_sent;
struct pf_state *sc_bulk_send_next;
struct pf_state *sc_bulk_terminator;
int sc_bulk_tries;
int sc_maxcount; /* number of states in mtu */
int sc_maxupdates; /* number of updates/state */
};
extern struct pfsync_softc *pfsyncif;
#endif
struct pfsync_header {
u_int8_t version;
#define PFSYNC_VERSION 4
u_int8_t af;
u_int8_t action;
#define PFSYNC_ACT_CLR 0 /* clear all states */
#define PFSYNC_ACT_INS 1 /* insert state */
#define PFSYNC_ACT_UPD 2 /* update state */
#define PFSYNC_ACT_DEL 3 /* delete state */
#define PFSYNC_ACT_UPD_C 4 /* "compressed" state update */
#define PFSYNC_ACT_DEL_C 5 /* "compressed" state delete */
#define PFSYNC_ACT_INS_F 6 /* insert fragment */
#define PFSYNC_ACT_DEL_F 7 /* delete fragments */
#define PFSYNC_ACT_UREQ 8 /* request "uncompressed" state */
#define PFSYNC_ACT_BUS 9 /* Bulk Update Status */
#define PFSYNC_ACT_TDB_UPD 10 /* TDB replay counter update */
#define PFSYNC_ACT_MAX 11
u_int8_t count;
u_int8_t pf_chksum[PF_MD5_DIGEST_LENGTH];
} __packed;
#define PFSYNC_BULKPACKETS 1 /* # of packets per timeout */
#define PFSYNC_MAX_BULKTRIES 12
#define PFSYNC_HDRLEN sizeof(struct pfsync_header)
#define PFSYNC_ACTIONS \
"CLR ST", "INS ST", "UPD ST", "DEL ST", \
"UPD ST COMP", "DEL ST COMP", "INS FR", "DEL FR", \
"UPD REQ", "BLK UPD STAT", "TDB UPD"
#define PFSYNC_DFLTTL 255
struct pfsyncstats {
u_int64_t pfsyncs_ipackets; /* total input packets, IPv4 */
u_int64_t pfsyncs_ipackets6; /* total input packets, IPv6 */
u_int64_t pfsyncs_badif; /* not the right interface */
u_int64_t pfsyncs_badttl; /* TTL is not PFSYNC_DFLTTL */
u_int64_t pfsyncs_hdrops; /* packets shorter than hdr */
u_int64_t pfsyncs_badver; /* bad (incl unsupp) version */
u_int64_t pfsyncs_badact; /* bad action */
u_int64_t pfsyncs_badlen; /* data length does not match */
u_int64_t pfsyncs_badauth; /* bad authentication */
u_int64_t pfsyncs_stale; /* stale state */
u_int64_t pfsyncs_badval; /* bad values */
u_int64_t pfsyncs_badstate; /* insert/lookup failed */
u_int64_t pfsyncs_opackets; /* total output packets, IPv4 */
u_int64_t pfsyncs_opackets6; /* total output packets, IPv6 */
u_int64_t pfsyncs_onomem; /* no memory for an mbuf */
u_int64_t pfsyncs_oerrors; /* ip output error */
};
/*
* Configuration structure for SIOCSETPFSYNC SIOCGETPFSYNC
*/
struct pfsyncreq {
char pfsyncr_syncdev[IFNAMSIZ];
struct in_addr pfsyncr_syncpeer;
int pfsyncr_maxupdates;
int pfsyncr_authlevel;
};
#ifdef _KERNEL
void pfsync_input(struct mbuf *, ...);
int pfsync_clear_states(u_int32_t, char *);
int pfsync_pack_state(u_int8_t, struct pf_state *, int);
int pfsync_sysctl(int *, u_int, void *, size_t *,
void *, size_t);
void pfsync_state_export(struct pfsync_state *,
struct pf_state *);
#define PFSYNC_SI_IOCTL 0x01
#define PFSYNC_SI_CKSUM 0x02
int pfsync_state_import(struct pfsync_state *, u_int8_t);
#define pfsync_insert_state(st) do { \
if ((st->rule.ptr->rule_flag & PFRULE_NOSYNC) || \
(st->key[PF_SK_WIRE]->proto == IPPROTO_PFSYNC)) \
st->sync_flags |= PFSTATE_NOSYNC; \
else if (!st->sync_flags) \
pfsync_pack_state(PFSYNC_ACT_INS, (st), \
PFSYNC_FLAG_COMPRESS); \
st->sync_flags &= ~PFSTATE_FROMSYNC; \
} while (0)
#define pfsync_update_state(st) do { \
if (!st->sync_flags) \
pfsync_pack_state(PFSYNC_ACT_UPD, (st), \
PFSYNC_FLAG_COMPRESS); \
st->sync_flags &= ~PFSTATE_FROMSYNC; \
} while (0)
#define pfsync_delete_state(st) do { \
if (!st->sync_flags) \
pfsync_pack_state(PFSYNC_ACT_DEL, (st), \
PFSYNC_FLAG_COMPRESS); \
} while (0)
int pfsync_update_tdb(struct tdb *, int);
#endif
#endif /* _NET_IF_PFSYNC_H_ */
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