7c1fe95333
Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
295 lines
8.3 KiB
C
295 lines
8.3 KiB
C
/* $FreeBSD$ */
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/* $OpenBSD: if_pfsync.h,v 1.13 2004/03/22 04:54:17 mcbride 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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#define PFSYNC_ID_LEN sizeof(u_int64_t)
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struct pfsync_state_scrub {
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u_int16_t pfss_flags;
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u_int8_t pfss_ttl; /* stashed TTL */
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u_int8_t scrub_flag;
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u_int32_t pfss_ts_mod; /* timestamp modulation */
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} __packed;
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struct pfsync_state_host {
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struct pf_addr addr;
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u_int16_t port;
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u_int16_t pad[3];
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} __packed;
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struct pfsync_state_peer {
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struct pfsync_state_scrub scrub; /* state is scrubbed */
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u_int32_t seqlo; /* Max sequence number sent */
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u_int32_t seqhi; /* Max the other end ACKd + win */
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u_int32_t seqdiff; /* Sequence number modulator */
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u_int16_t max_win; /* largest window (pre scaling) */
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u_int16_t mss; /* Maximum segment size option */
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u_int8_t state; /* active state level */
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u_int8_t wscale; /* window scaling factor */
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u_int8_t scrub_flag;
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u_int8_t pad[5];
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} __packed;
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struct pfsync_state {
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u_int32_t id[2];
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char ifname[IFNAMSIZ];
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struct pfsync_state_host lan;
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struct pfsync_state_host gwy;
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struct pfsync_state_host ext;
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struct pfsync_state_peer src;
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struct pfsync_state_peer dst;
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struct pf_addr rt_addr;
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u_int32_t rule;
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u_int32_t anchor;
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u_int32_t nat_rule;
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u_int32_t creation;
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u_int32_t expire;
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u_int32_t packets[2];
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u_int32_t bytes[2];
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u_int32_t creatorid;
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sa_family_t af;
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u_int8_t proto;
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u_int8_t direction;
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u_int8_t log;
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u_int8_t allow_opts;
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u_int8_t timeout;
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u_int8_t sync_flags;
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u_int8_t updates;
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} __packed;
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struct pfsync_state_upd {
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u_int32_t id[2];
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struct pfsync_state_peer src;
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struct pfsync_state_peer dst;
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u_int32_t creatorid;
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u_int32_t expire;
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u_int8_t timeout;
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u_int8_t updates;
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u_int8_t pad[6];
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} __packed;
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struct pfsync_state_del {
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u_int32_t id[2];
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u_int32_t creatorid;
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struct {
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u_int8_t state;
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} src;
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struct {
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u_int8_t state;
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} dst;
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u_int8_t pad[2];
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} __packed;
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struct pfsync_state_upd_req {
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u_int32_t id[2];
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u_int32_t creatorid;
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u_int32_t pad;
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} __packed;
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struct pfsync_state_clr {
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char ifname[IFNAMSIZ];
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u_int32_t creatorid;
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u_int32_t pad;
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} __packed;
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struct pfsync_state_bus {
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u_int32_t creatorid;
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u_int32_t endtime;
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u_int8_t status;
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#define PFSYNC_BUS_START 1
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#define PFSYNC_BUS_END 2
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u_int8_t pad[7];
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} __packed;
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#ifdef _KERNEL
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union sc_statep {
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struct pfsync_state *s;
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struct pfsync_state_upd *u;
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struct pfsync_state_del *d;
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struct pfsync_state_clr *c;
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struct pfsync_state_bus *b;
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struct pfsync_state_upd_req *r;
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};
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extern int pfsync_sync_ok;
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struct pfsync_softc {
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struct ifnet sc_if;
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struct ifnet *sc_sync_ifp;
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struct ip_moptions sc_imo;
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#ifdef __FreeBSD__
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struct callout sc_tmo;
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struct callout sc_bulk_tmo;
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struct callout sc_bulkfail_tmo;
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#else
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struct timeout sc_tmo;
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struct timeout sc_bulk_tmo;
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struct timeout sc_bulkfail_tmo;
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#endif
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struct in_addr sc_sendaddr;
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struct mbuf *sc_mbuf; /* current cummulative mbuf */
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struct mbuf *sc_mbuf_net; /* current cummulative mbuf */
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union sc_statep sc_statep;
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union sc_statep sc_statep_net;
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u_int32_t sc_ureq_received;
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u_int32_t sc_ureq_sent;
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int sc_bulk_tries;
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int sc_maxcount; /* number of states in mtu */
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int sc_maxupdates; /* number of updates/state */
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#ifdef __FreeBSD__
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LIST_ENTRY(pfsync_softc) sc_next;
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#endif
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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 2
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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 /* clear all states */
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#define PFSYNC_ACT_INS 1 /* insert state */
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#define PFSYNC_ACT_UPD 2 /* update state */
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#define PFSYNC_ACT_DEL 3 /* delete state */
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#define PFSYNC_ACT_UPD_C 4 /* "compressed" state update */
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#define PFSYNC_ACT_DEL_C 5 /* "compressed" state delete */
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#define PFSYNC_ACT_INS_F 6 /* insert fragment */
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#define PFSYNC_ACT_DEL_F 7 /* delete fragments */
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#define PFSYNC_ACT_UREQ 8 /* request "uncompressed" state */
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#define PFSYNC_ACT_BUS 9 /* Bulk Update Status */
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#define PFSYNC_ACT_MAX 10
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u_int8_t count;
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} __packed;
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#define PFSYNC_BULKPACKETS 1 /* # of packets per timeout */
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#define PFSYNC_MAX_BULKTRIES 12
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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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"UPD ST COMP", "DEL ST COMP", "INS FR", "DEL FR", \
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"UPD REQ", "BLK UPD STAT"
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#define PFSYNC_DFLTTL 255
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struct pfsyncstats {
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u_long pfsyncs_ipackets; /* total input packets, IPv4 */
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u_long pfsyncs_ipackets6; /* total input packets, IPv6 */
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u_long pfsyncs_badif; /* not the right interface */
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u_long pfsyncs_badttl; /* TTL is not PFSYNC_DFLTTL */
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u_long pfsyncs_hdrops; /* packets shorter than header */
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u_long pfsyncs_badver; /* bad (incl unsupp) version */
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u_long pfsyncs_badact; /* bad action */
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u_long pfsyncs_badlen; /* data length does not match */
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u_long pfsyncs_badauth; /* bad authentication */
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u_long pfsyncs_badstate; /* insert/lookup failed */
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u_long pfsyncs_opackets; /* total output packets, IPv4 */
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u_long pfsyncs_opackets6; /* total output packets, IPv6 */
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u_long pfsyncs_onomem; /* no memory for an mbuf for a send */
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u_long pfsyncs_oerrors; /* ip output error */
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};
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/*
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* Configuration structure for SIOCSETPFSYNC SIOCGETPFSYNC
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*/
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struct pfsyncreq {
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char pfsyncr_syncif[IFNAMSIZ];
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int pfsyncr_maxupdates;
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int pfsyncr_authlevel;
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};
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#define SIOCSETPFSYNC _IOW('i', 247, struct ifreq)
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#define SIOCGETPFSYNC _IOWR('i', 248, struct ifreq)
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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)->mss = htons((s)->mss); \
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(d)->state = (s)->state; \
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(d)->wscale = (s)->wscale; \
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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)->mss = ntohs((s)->mss); \
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(d)->state = (s)->state; \
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(d)->wscale = (s)->wscale; \
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} while (0)
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#define pf_state_host_hton(s,d) do { \
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bcopy(&(s)->addr, &(d)->addr, sizeof((d)->addr)); \
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(d)->port = (s)->port; \
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} while (0)
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#define pf_state_host_ntoh(s,d) do { \
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bcopy(&(s)->addr, &(d)->addr, sizeof((d)->addr)); \
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(d)->port = (s)->port; \
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} while (0)
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#ifdef _KERNEL
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#ifdef __FreeBSD__
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void pfsync_input(struct mbuf *, __unused int);
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#else
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void pfsync_input(struct mbuf *, ...);
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#endif
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int pfsync_clear_states(u_int32_t, char *);
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int pfsync_pack_state(u_int8_t, struct pf_state *, int);
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#define pfsync_insert_state(st) do { \
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if ((st->rule.ptr->rule_flag & PFRULE_NOSYNC) || \
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(st->proto == IPPROTO_PFSYNC)) \
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st->sync_flags |= PFSTATE_NOSYNC; \
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else if (!st->sync_flags) \
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pfsync_pack_state(PFSYNC_ACT_INS, (st), 1); \
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st->sync_flags &= ~PFSTATE_FROMSYNC; \
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} while (0)
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#define pfsync_update_state(st) do { \
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if (!st->sync_flags) \
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pfsync_pack_state(PFSYNC_ACT_UPD, (st), 1); \
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st->sync_flags &= ~PFSTATE_FROMSYNC; \
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} while (0)
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#define pfsync_delete_state(st) do { \
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if (!st->sync_flags) \
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pfsync_pack_state(PFSYNC_ACT_DEL, (st), 1); \
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st->sync_flags &= ~PFSTATE_FROMSYNC; \
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} while (0)
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#endif
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#endif /* _NET_IF_PFSYNC_H_ */
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