3b3a8eb937
reside, and move there ipfw(4) and pf(4). o Move most modified parts of pf out of contrib. Actual movements: sys/contrib/pf/net/*.c -> sys/netpfil/pf/ sys/contrib/pf/net/*.h -> sys/net/ contrib/pf/pfctl/*.c -> sbin/pfctl contrib/pf/pfctl/*.h -> sbin/pfctl contrib/pf/pfctl/pfctl.8 -> sbin/pfctl contrib/pf/pfctl/*.4 -> share/man/man4 contrib/pf/pfctl/*.5 -> share/man/man5 sys/netinet/ipfw -> sys/netpfil/ipfw The arguable movement is pf/net/*.h -> sys/net. There are future plans to refactor pf includes, so I decided not to break things twice. Not modified bits of pf left in contrib: authpf, ftp-proxy, tftp-proxy, pflogd. The ipfw(4) movement is planned to be merged to stable/9, to make head and stable match. Discussed with: bz, luigi
2398 lines
57 KiB
C
2398 lines
57 KiB
C
/* $OpenBSD: if_pfsync.c,v 1.110 2009/02/24 05:39:19 dlg Exp $ */
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/*
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* Copyright (c) 2002 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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/*
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* Copyright (c) 2009 David Gwynne <dlg@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* Revisions picked from OpenBSD after revision 1.110 import:
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* 1.118, 1.124, 1.148, 1.149, 1.151, 1.171 - fixes to bulk updates
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* 1.120, 1.175 - use monotonic time_uptime
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* 1.122 - reduce number of updates for non-TCP sessions
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* 1.128 - cleanups
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* 1.146 - bzero() mbuf before sparsely filling it with data
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* 1.170 - SIOCSIFMTU checks
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* 1.126, 1.142 - deferred packets processing
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* 1.173 - correct expire time processing
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include "opt_pf.h"
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/endian.h>
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#include <sys/interrupt.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/mbuf.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/priv.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/sysctl.h>
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#include <net/bpf.h>
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#include <net/if.h>
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#include <net/if_clone.h>
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#include <net/if_types.h>
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#include <net/pfvar.h>
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#include <net/if_pfsync.h>
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#include <netinet/if_ether.h>
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#include <netinet/ip.h>
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#include <netinet/ip_carp.h>
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#include <netinet/ip_var.h>
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#include <netinet/tcp.h>
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#include <netinet/tcp_fsm.h>
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#include <netinet/tcp_seq.h>
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#define PFSYNC_MINPKT ( \
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sizeof(struct ip) + \
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sizeof(struct pfsync_header) + \
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sizeof(struct pfsync_subheader) + \
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sizeof(struct pfsync_eof))
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struct pfsync_pkt {
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struct ip *ip;
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struct in_addr src;
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u_int8_t flags;
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};
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static int pfsync_upd_tcp(struct pf_state *, struct pfsync_state_peer *,
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struct pfsync_state_peer *);
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static int pfsync_in_clr(struct pfsync_pkt *, struct mbuf *, int, int);
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static int pfsync_in_ins(struct pfsync_pkt *, struct mbuf *, int, int);
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static int pfsync_in_iack(struct pfsync_pkt *, struct mbuf *, int, int);
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static int pfsync_in_upd(struct pfsync_pkt *, struct mbuf *, int, int);
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static int pfsync_in_upd_c(struct pfsync_pkt *, struct mbuf *, int, int);
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static int pfsync_in_ureq(struct pfsync_pkt *, struct mbuf *, int, int);
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static int pfsync_in_del(struct pfsync_pkt *, struct mbuf *, int, int);
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static int pfsync_in_del_c(struct pfsync_pkt *, struct mbuf *, int, int);
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static int pfsync_in_bus(struct pfsync_pkt *, struct mbuf *, int, int);
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static int pfsync_in_tdb(struct pfsync_pkt *, struct mbuf *, int, int);
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static int pfsync_in_eof(struct pfsync_pkt *, struct mbuf *, int, int);
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static int pfsync_in_error(struct pfsync_pkt *, struct mbuf *, int, int);
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static int (*pfsync_acts[])(struct pfsync_pkt *, struct mbuf *, int, int) = {
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pfsync_in_clr, /* PFSYNC_ACT_CLR */
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pfsync_in_ins, /* PFSYNC_ACT_INS */
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pfsync_in_iack, /* PFSYNC_ACT_INS_ACK */
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pfsync_in_upd, /* PFSYNC_ACT_UPD */
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pfsync_in_upd_c, /* PFSYNC_ACT_UPD_C */
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pfsync_in_ureq, /* PFSYNC_ACT_UPD_REQ */
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pfsync_in_del, /* PFSYNC_ACT_DEL */
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pfsync_in_del_c, /* PFSYNC_ACT_DEL_C */
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pfsync_in_error, /* PFSYNC_ACT_INS_F */
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pfsync_in_error, /* PFSYNC_ACT_DEL_F */
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pfsync_in_bus, /* PFSYNC_ACT_BUS */
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pfsync_in_tdb, /* PFSYNC_ACT_TDB */
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pfsync_in_eof /* PFSYNC_ACT_EOF */
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};
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struct pfsync_q {
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int (*write)(struct pf_state *, struct mbuf *, int);
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size_t len;
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u_int8_t action;
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};
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/* we have one of these for every PFSYNC_S_ */
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static int pfsync_out_state(struct pf_state *, struct mbuf *, int);
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static int pfsync_out_iack(struct pf_state *, struct mbuf *, int);
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static int pfsync_out_upd_c(struct pf_state *, struct mbuf *, int);
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static int pfsync_out_del(struct pf_state *, struct mbuf *, int);
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static struct pfsync_q pfsync_qs[] = {
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{ pfsync_out_state, sizeof(struct pfsync_state), PFSYNC_ACT_INS },
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{ pfsync_out_iack, sizeof(struct pfsync_ins_ack), PFSYNC_ACT_INS_ACK },
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{ pfsync_out_state, sizeof(struct pfsync_state), PFSYNC_ACT_UPD },
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{ pfsync_out_upd_c, sizeof(struct pfsync_upd_c), PFSYNC_ACT_UPD_C },
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{ pfsync_out_del, sizeof(struct pfsync_del_c), PFSYNC_ACT_DEL_C }
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};
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static void pfsync_q_ins(struct pf_state *, int);
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static void pfsync_q_del(struct pf_state *);
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static void pfsync_update_state(struct pf_state *);
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struct pfsync_upd_req_item {
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TAILQ_ENTRY(pfsync_upd_req_item) ur_entry;
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struct pfsync_upd_req ur_msg;
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};
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struct pfsync_deferral {
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struct pfsync_softc *pd_sc;
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TAILQ_ENTRY(pfsync_deferral) pd_entry;
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u_int pd_refs;
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struct callout pd_tmo;
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struct pf_state *pd_st;
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struct mbuf *pd_m;
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};
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struct pfsync_softc {
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/* Configuration */
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struct ifnet *sc_ifp;
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struct ifnet *sc_sync_if;
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struct ip_moptions sc_imo;
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struct in_addr sc_sync_peer;
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uint32_t sc_flags;
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#define PFSYNCF_OK 0x00000001
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#define PFSYNCF_DEFER 0x00000002
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#define PFSYNCF_PUSH 0x00000004
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uint8_t sc_maxupdates;
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struct ip sc_template;
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struct callout sc_tmo;
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struct mtx sc_mtx;
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/* Queued data */
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size_t sc_len;
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TAILQ_HEAD(, pf_state) sc_qs[PFSYNC_S_COUNT];
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TAILQ_HEAD(, pfsync_upd_req_item) sc_upd_req_list;
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TAILQ_HEAD(, pfsync_deferral) sc_deferrals;
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u_int sc_deferred;
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void *sc_plus;
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size_t sc_pluslen;
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/* Bulk update info */
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struct mtx sc_bulk_mtx;
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uint32_t sc_ureq_sent;
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int sc_bulk_tries;
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uint32_t sc_ureq_received;
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int sc_bulk_hashid;
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uint64_t sc_bulk_stateid;
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uint32_t sc_bulk_creatorid;
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struct callout sc_bulk_tmo;
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struct callout sc_bulkfail_tmo;
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};
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#define PFSYNC_LOCK(sc) mtx_lock(&(sc)->sc_mtx)
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#define PFSYNC_UNLOCK(sc) mtx_unlock(&(sc)->sc_mtx)
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#define PFSYNC_LOCK_ASSERT(sc) mtx_assert(&(sc)->sc_mtx, MA_OWNED)
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#define PFSYNC_BLOCK(sc) mtx_lock(&(sc)->sc_bulk_mtx)
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#define PFSYNC_BUNLOCK(sc) mtx_unlock(&(sc)->sc_bulk_mtx)
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#define PFSYNC_BLOCK_ASSERT(sc) mtx_assert(&(sc)->sc_bulk_mtx, MA_OWNED)
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static MALLOC_DEFINE(M_PFSYNC, "pfsync", "pfsync(4) data");
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static VNET_DEFINE(struct pfsync_softc *, pfsyncif) = NULL;
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#define V_pfsyncif VNET(pfsyncif)
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static VNET_DEFINE(void *, pfsync_swi_cookie) = NULL;
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#define V_pfsync_swi_cookie VNET(pfsync_swi_cookie)
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static VNET_DEFINE(struct pfsyncstats, pfsyncstats);
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#define V_pfsyncstats VNET(pfsyncstats)
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static VNET_DEFINE(int, pfsync_carp_adj) = CARP_MAXSKEW;
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#define V_pfsync_carp_adj VNET(pfsync_carp_adj)
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static void pfsync_timeout(void *);
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static void pfsync_push(struct pfsync_softc *);
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static void pfsyncintr(void *);
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static int pfsync_multicast_setup(struct pfsync_softc *, struct ifnet *,
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void *);
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static void pfsync_multicast_cleanup(struct pfsync_softc *);
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static int pfsync_init(void);
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static void pfsync_uninit(void);
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SYSCTL_NODE(_net, OID_AUTO, pfsync, CTLFLAG_RW, 0, "PFSYNC");
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SYSCTL_VNET_STRUCT(_net_pfsync, OID_AUTO, stats, CTLFLAG_RW,
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&VNET_NAME(pfsyncstats), pfsyncstats,
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"PFSYNC statistics (struct pfsyncstats, net/if_pfsync.h)");
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SYSCTL_INT(_net_pfsync, OID_AUTO, carp_demotion_factor, CTLFLAG_RW,
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&VNET_NAME(pfsync_carp_adj), 0, "pfsync's CARP demotion factor adjustment");
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static int pfsync_clone_create(struct if_clone *, int, caddr_t);
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static void pfsync_clone_destroy(struct ifnet *);
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static int pfsync_alloc_scrub_memory(struct pfsync_state_peer *,
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struct pf_state_peer *);
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static int pfsyncoutput(struct ifnet *, struct mbuf *, struct sockaddr *,
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struct route *);
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static int pfsyncioctl(struct ifnet *, u_long, caddr_t);
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static int pfsync_defer(struct pf_state *, struct mbuf *);
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static void pfsync_undefer(struct pfsync_deferral *, int);
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static void pfsync_undefer_state(struct pf_state *, int);
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static void pfsync_defer_tmo(void *);
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static void pfsync_request_update(u_int32_t, u_int64_t);
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static void pfsync_update_state_req(struct pf_state *);
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static void pfsync_drop(struct pfsync_softc *);
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static void pfsync_sendout(int);
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static void pfsync_send_plus(void *, size_t);
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static void pfsync_bulk_start(void);
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static void pfsync_bulk_status(u_int8_t);
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static void pfsync_bulk_update(void *);
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static void pfsync_bulk_fail(void *);
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#ifdef IPSEC
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static void pfsync_update_net_tdb(struct pfsync_tdb *);
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#endif
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#define PFSYNC_MAX_BULKTRIES 12
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VNET_DEFINE(struct ifc_simple_data, pfsync_cloner_data);
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VNET_DEFINE(struct if_clone, pfsync_cloner);
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#define V_pfsync_cloner_data VNET(pfsync_cloner_data)
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#define V_pfsync_cloner VNET(pfsync_cloner)
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IFC_SIMPLE_DECLARE(pfsync, 1);
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static int
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pfsync_clone_create(struct if_clone *ifc, int unit, caddr_t param)
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{
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struct pfsync_softc *sc;
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struct ifnet *ifp;
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int q;
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if (unit != 0)
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return (EINVAL);
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sc = malloc(sizeof(struct pfsync_softc), M_PFSYNC, M_WAITOK | M_ZERO);
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sc->sc_flags |= PFSYNCF_OK;
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for (q = 0; q < PFSYNC_S_COUNT; q++)
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TAILQ_INIT(&sc->sc_qs[q]);
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TAILQ_INIT(&sc->sc_upd_req_list);
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TAILQ_INIT(&sc->sc_deferrals);
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sc->sc_len = PFSYNC_MINPKT;
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sc->sc_maxupdates = 128;
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ifp = sc->sc_ifp = if_alloc(IFT_PFSYNC);
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if (ifp == NULL) {
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free(sc, M_PFSYNC);
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return (ENOSPC);
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}
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if_initname(ifp, ifc->ifc_name, unit);
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ifp->if_softc = sc;
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ifp->if_ioctl = pfsyncioctl;
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ifp->if_output = pfsyncoutput;
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ifp->if_type = IFT_PFSYNC;
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ifp->if_snd.ifq_maxlen = ifqmaxlen;
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ifp->if_hdrlen = sizeof(struct pfsync_header);
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ifp->if_mtu = ETHERMTU;
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mtx_init(&sc->sc_mtx, "pfsync", NULL, MTX_DEF);
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mtx_init(&sc->sc_bulk_mtx, "pfsync bulk", NULL, MTX_DEF);
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callout_init(&sc->sc_tmo, CALLOUT_MPSAFE);
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callout_init_mtx(&sc->sc_bulk_tmo, &sc->sc_bulk_mtx, 0);
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callout_init_mtx(&sc->sc_bulkfail_tmo, &sc->sc_bulk_mtx, 0);
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if_attach(ifp);
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bpfattach(ifp, DLT_PFSYNC, PFSYNC_HDRLEN);
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V_pfsyncif = sc;
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return (0);
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}
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static void
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pfsync_clone_destroy(struct ifnet *ifp)
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{
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struct pfsync_softc *sc = ifp->if_softc;
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/*
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* At this stage, everything should have already been
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* cleared by pfsync_uninit(), and we have only to
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* drain callouts.
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*/
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while (sc->sc_deferred > 0) {
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struct pfsync_deferral *pd = TAILQ_FIRST(&sc->sc_deferrals);
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TAILQ_REMOVE(&sc->sc_deferrals, pd, pd_entry);
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sc->sc_deferred--;
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if (callout_stop(&pd->pd_tmo)) {
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pf_release_state(pd->pd_st);
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m_freem(pd->pd_m);
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free(pd, M_PFSYNC);
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} else {
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pd->pd_refs++;
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callout_drain(&pd->pd_tmo);
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free(pd, M_PFSYNC);
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}
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}
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callout_drain(&sc->sc_tmo);
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callout_drain(&sc->sc_bulkfail_tmo);
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callout_drain(&sc->sc_bulk_tmo);
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if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p)
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(*carp_demote_adj_p)(-V_pfsync_carp_adj, "pfsync destroy");
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bpfdetach(ifp);
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if_detach(ifp);
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pfsync_drop(sc);
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if_free(ifp);
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if (sc->sc_imo.imo_membership)
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pfsync_multicast_cleanup(sc);
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mtx_destroy(&sc->sc_mtx);
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mtx_destroy(&sc->sc_bulk_mtx);
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free(sc, M_PFSYNC);
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V_pfsyncif = NULL;
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}
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static int
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pfsync_alloc_scrub_memory(struct pfsync_state_peer *s,
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struct pf_state_peer *d)
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{
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if (s->scrub.scrub_flag && d->scrub == NULL) {
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d->scrub = uma_zalloc(V_pf_state_scrub_z, M_NOWAIT | M_ZERO);
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if (d->scrub == NULL)
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return (ENOMEM);
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}
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return (0);
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}
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static int
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pfsync_state_import(struct pfsync_state *sp, u_int8_t flags)
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{
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struct pfsync_softc *sc = V_pfsyncif;
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struct pf_state *st = NULL;
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struct pf_state_key *skw = NULL, *sks = NULL;
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struct pf_rule *r = NULL;
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struct pfi_kif *kif;
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int error;
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PF_RULES_RASSERT();
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if (sp->creatorid == 0 && V_pf_status.debug >= PF_DEBUG_MISC) {
|
|
printf("%s: invalid creator id: %08x\n", __func__,
|
|
ntohl(sp->creatorid));
|
|
return (EINVAL);
|
|
}
|
|
|
|
if ((kif = pfi_kif_find(sp->ifname)) == NULL) {
|
|
if (V_pf_status.debug >= PF_DEBUG_MISC)
|
|
printf("%s: unknown interface: %s\n", __func__,
|
|
sp->ifname);
|
|
if (flags & PFSYNC_SI_IOCTL)
|
|
return (EINVAL);
|
|
return (0); /* skip this state */
|
|
}
|
|
|
|
/*
|
|
* If the ruleset checksums match or the state is coming from the ioctl,
|
|
* it's safe to associate the state with the rule of that number.
|
|
*/
|
|
if (sp->rule != htonl(-1) && sp->anchor == htonl(-1) &&
|
|
(flags & (PFSYNC_SI_IOCTL | PFSYNC_SI_CKSUM)) && ntohl(sp->rule) <
|
|
pf_main_ruleset.rules[PF_RULESET_FILTER].active.rcount)
|
|
r = pf_main_ruleset.rules[
|
|
PF_RULESET_FILTER].active.ptr_array[ntohl(sp->rule)];
|
|
else
|
|
r = &V_pf_default_rule;
|
|
|
|
if ((r->max_states && r->states_cur >= r->max_states))
|
|
goto cleanup;
|
|
|
|
/*
|
|
* XXXGL: consider M_WAITOK in ioctl path after.
|
|
*/
|
|
if ((st = uma_zalloc(V_pf_state_z, M_NOWAIT | M_ZERO)) == NULL)
|
|
goto cleanup;
|
|
|
|
if ((skw = uma_zalloc(V_pf_state_key_z, M_NOWAIT)) == NULL)
|
|
goto cleanup;
|
|
|
|
if (PF_ANEQ(&sp->key[PF_SK_WIRE].addr[0],
|
|
&sp->key[PF_SK_STACK].addr[0], sp->af) ||
|
|
PF_ANEQ(&sp->key[PF_SK_WIRE].addr[1],
|
|
&sp->key[PF_SK_STACK].addr[1], sp->af) ||
|
|
sp->key[PF_SK_WIRE].port[0] != sp->key[PF_SK_STACK].port[0] ||
|
|
sp->key[PF_SK_WIRE].port[1] != sp->key[PF_SK_STACK].port[1]) {
|
|
sks = uma_zalloc(V_pf_state_key_z, M_NOWAIT);
|
|
if (sks == NULL)
|
|
goto cleanup;
|
|
} else
|
|
sks = skw;
|
|
|
|
/* allocate memory for scrub info */
|
|
if (pfsync_alloc_scrub_memory(&sp->src, &st->src) ||
|
|
pfsync_alloc_scrub_memory(&sp->dst, &st->dst))
|
|
goto cleanup;
|
|
|
|
/* copy to state key(s) */
|
|
skw->addr[0] = sp->key[PF_SK_WIRE].addr[0];
|
|
skw->addr[1] = sp->key[PF_SK_WIRE].addr[1];
|
|
skw->port[0] = sp->key[PF_SK_WIRE].port[0];
|
|
skw->port[1] = sp->key[PF_SK_WIRE].port[1];
|
|
skw->proto = sp->proto;
|
|
skw->af = sp->af;
|
|
if (sks != skw) {
|
|
sks->addr[0] = sp->key[PF_SK_STACK].addr[0];
|
|
sks->addr[1] = sp->key[PF_SK_STACK].addr[1];
|
|
sks->port[0] = sp->key[PF_SK_STACK].port[0];
|
|
sks->port[1] = sp->key[PF_SK_STACK].port[1];
|
|
sks->proto = sp->proto;
|
|
sks->af = sp->af;
|
|
}
|
|
|
|
/* copy to state */
|
|
bcopy(&sp->rt_addr, &st->rt_addr, sizeof(st->rt_addr));
|
|
st->creation = time_uptime - ntohl(sp->creation);
|
|
st->expire = time_uptime;
|
|
if (sp->expire) {
|
|
uint32_t timeout;
|
|
|
|
timeout = r->timeout[sp->timeout];
|
|
if (!timeout)
|
|
timeout = V_pf_default_rule.timeout[sp->timeout];
|
|
|
|
/* sp->expire may have been adaptively scaled by export. */
|
|
st->expire -= timeout - ntohl(sp->expire);
|
|
}
|
|
|
|
st->direction = sp->direction;
|
|
st->log = sp->log;
|
|
st->timeout = sp->timeout;
|
|
st->state_flags = sp->state_flags;
|
|
|
|
st->id = sp->id;
|
|
st->creatorid = sp->creatorid;
|
|
pf_state_peer_ntoh(&sp->src, &st->src);
|
|
pf_state_peer_ntoh(&sp->dst, &st->dst);
|
|
|
|
st->rule.ptr = r;
|
|
st->nat_rule.ptr = NULL;
|
|
st->anchor.ptr = NULL;
|
|
st->rt_kif = NULL;
|
|
|
|
st->pfsync_time = time_uptime;
|
|
st->sync_state = PFSYNC_S_NONE;
|
|
|
|
/* XXX when we have nat_rule/anchors, use STATE_INC_COUNTERS */
|
|
r->states_cur++;
|
|
r->states_tot++;
|
|
|
|
if (!(flags & PFSYNC_SI_IOCTL))
|
|
st->state_flags |= PFSTATE_NOSYNC;
|
|
|
|
if ((error = pf_state_insert(kif, skw, sks, st)) != 0) {
|
|
/* XXX when we have nat_rule/anchors, use STATE_DEC_COUNTERS */
|
|
r->states_cur--;
|
|
goto cleanup_state;
|
|
}
|
|
|
|
if (!(flags & PFSYNC_SI_IOCTL)) {
|
|
st->state_flags &= ~PFSTATE_NOSYNC;
|
|
if (st->state_flags & PFSTATE_ACK) {
|
|
pfsync_q_ins(st, PFSYNC_S_IACK);
|
|
pfsync_push(sc);
|
|
}
|
|
}
|
|
st->state_flags &= ~PFSTATE_ACK;
|
|
PF_STATE_UNLOCK(st);
|
|
|
|
return (0);
|
|
|
|
cleanup:
|
|
error = ENOMEM;
|
|
if (skw == sks)
|
|
sks = NULL;
|
|
if (skw != NULL)
|
|
uma_zfree(V_pf_state_key_z, skw);
|
|
if (sks != NULL)
|
|
uma_zfree(V_pf_state_key_z, sks);
|
|
|
|
cleanup_state: /* pf_state_insert() frees the state keys. */
|
|
if (st) {
|
|
if (st->dst.scrub)
|
|
uma_zfree(V_pf_state_scrub_z, st->dst.scrub);
|
|
if (st->src.scrub)
|
|
uma_zfree(V_pf_state_scrub_z, st->src.scrub);
|
|
uma_zfree(V_pf_state_z, st);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
pfsync_input(struct mbuf *m, __unused int off)
|
|
{
|
|
struct pfsync_softc *sc = V_pfsyncif;
|
|
struct pfsync_pkt pkt;
|
|
struct ip *ip = mtod(m, struct ip *);
|
|
struct pfsync_header *ph;
|
|
struct pfsync_subheader subh;
|
|
|
|
int offset;
|
|
int rv;
|
|
uint16_t count;
|
|
|
|
V_pfsyncstats.pfsyncs_ipackets++;
|
|
|
|
/* Verify that we have a sync interface configured. */
|
|
if (!sc || !sc->sc_sync_if || !V_pf_status.running ||
|
|
(sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
|
|
goto done;
|
|
|
|
/* verify that the packet came in on the right interface */
|
|
if (sc->sc_sync_if != m->m_pkthdr.rcvif) {
|
|
V_pfsyncstats.pfsyncs_badif++;
|
|
goto done;
|
|
}
|
|
|
|
sc->sc_ifp->if_ipackets++;
|
|
sc->sc_ifp->if_ibytes += m->m_pkthdr.len;
|
|
/* verify that the IP TTL is 255. */
|
|
if (ip->ip_ttl != PFSYNC_DFLTTL) {
|
|
V_pfsyncstats.pfsyncs_badttl++;
|
|
goto done;
|
|
}
|
|
|
|
offset = ip->ip_hl << 2;
|
|
if (m->m_pkthdr.len < offset + sizeof(*ph)) {
|
|
V_pfsyncstats.pfsyncs_hdrops++;
|
|
goto done;
|
|
}
|
|
|
|
if (offset + sizeof(*ph) > m->m_len) {
|
|
if (m_pullup(m, offset + sizeof(*ph)) == NULL) {
|
|
V_pfsyncstats.pfsyncs_hdrops++;
|
|
return;
|
|
}
|
|
ip = mtod(m, struct ip *);
|
|
}
|
|
ph = (struct pfsync_header *)((char *)ip + offset);
|
|
|
|
/* verify the version */
|
|
if (ph->version != PFSYNC_VERSION) {
|
|
V_pfsyncstats.pfsyncs_badver++;
|
|
goto done;
|
|
}
|
|
|
|
/* Cheaper to grab this now than having to mess with mbufs later */
|
|
pkt.ip = ip;
|
|
pkt.src = ip->ip_src;
|
|
pkt.flags = 0;
|
|
|
|
/*
|
|
* Trusting pf_chksum during packet processing, as well as seeking
|
|
* in interface name tree, require holding PF_RULES_RLOCK().
|
|
*/
|
|
PF_RULES_RLOCK();
|
|
if (!bcmp(&ph->pfcksum, &V_pf_status.pf_chksum, PF_MD5_DIGEST_LENGTH))
|
|
pkt.flags |= PFSYNC_SI_CKSUM;
|
|
|
|
offset += sizeof(*ph);
|
|
for (;;) {
|
|
m_copydata(m, offset, sizeof(subh), (caddr_t)&subh);
|
|
offset += sizeof(subh);
|
|
|
|
if (subh.action >= PFSYNC_ACT_MAX) {
|
|
V_pfsyncstats.pfsyncs_badact++;
|
|
PF_RULES_RUNLOCK();
|
|
goto done;
|
|
}
|
|
|
|
count = ntohs(subh.count);
|
|
V_pfsyncstats.pfsyncs_iacts[subh.action] += count;
|
|
rv = (*pfsync_acts[subh.action])(&pkt, m, offset, count);
|
|
if (rv == -1) {
|
|
PF_RULES_RUNLOCK();
|
|
return;
|
|
}
|
|
|
|
offset += rv;
|
|
}
|
|
PF_RULES_RUNLOCK();
|
|
|
|
done:
|
|
m_freem(m);
|
|
}
|
|
|
|
static int
|
|
pfsync_in_clr(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count)
|
|
{
|
|
struct pfsync_clr *clr;
|
|
struct mbuf *mp;
|
|
int len = sizeof(*clr) * count;
|
|
int i, offp;
|
|
u_int32_t creatorid;
|
|
|
|
mp = m_pulldown(m, offset, len, &offp);
|
|
if (mp == NULL) {
|
|
V_pfsyncstats.pfsyncs_badlen++;
|
|
return (-1);
|
|
}
|
|
clr = (struct pfsync_clr *)(mp->m_data + offp);
|
|
|
|
for (i = 0; i < count; i++) {
|
|
creatorid = clr[i].creatorid;
|
|
|
|
if (clr[i].ifname[0] != '\0' &&
|
|
pfi_kif_find(clr[i].ifname) == NULL)
|
|
continue;
|
|
|
|
for (int i = 0; i <= V_pf_hashmask; i++) {
|
|
struct pf_idhash *ih = &V_pf_idhash[i];
|
|
struct pf_state *s;
|
|
relock:
|
|
PF_HASHROW_LOCK(ih);
|
|
LIST_FOREACH(s, &ih->states, entry) {
|
|
if (s->creatorid == creatorid) {
|
|
s->state_flags |= PFSTATE_NOSYNC;
|
|
pf_unlink_state(s, PF_ENTER_LOCKED);
|
|
goto relock;
|
|
}
|
|
}
|
|
PF_HASHROW_UNLOCK(ih);
|
|
}
|
|
}
|
|
|
|
return (len);
|
|
}
|
|
|
|
static int
|
|
pfsync_in_ins(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count)
|
|
{
|
|
struct mbuf *mp;
|
|
struct pfsync_state *sa, *sp;
|
|
int len = sizeof(*sp) * count;
|
|
int i, offp;
|
|
|
|
mp = m_pulldown(m, offset, len, &offp);
|
|
if (mp == NULL) {
|
|
V_pfsyncstats.pfsyncs_badlen++;
|
|
return (-1);
|
|
}
|
|
sa = (struct pfsync_state *)(mp->m_data + offp);
|
|
|
|
for (i = 0; i < count; i++) {
|
|
sp = &sa[i];
|
|
|
|
/* Check for invalid values. */
|
|
if (sp->timeout >= PFTM_MAX ||
|
|
sp->src.state > PF_TCPS_PROXY_DST ||
|
|
sp->dst.state > PF_TCPS_PROXY_DST ||
|
|
sp->direction > PF_OUT ||
|
|
(sp->af != AF_INET && sp->af != AF_INET6)) {
|
|
if (V_pf_status.debug >= PF_DEBUG_MISC)
|
|
printf("%s: invalid value\n", __func__);
|
|
V_pfsyncstats.pfsyncs_badval++;
|
|
continue;
|
|
}
|
|
|
|
if (pfsync_state_import(sp, pkt->flags) == ENOMEM)
|
|
/* Drop out, but process the rest of the actions. */
|
|
break;
|
|
}
|
|
|
|
return (len);
|
|
}
|
|
|
|
static int
|
|
pfsync_in_iack(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count)
|
|
{
|
|
struct pfsync_ins_ack *ia, *iaa;
|
|
struct pf_state *st;
|
|
|
|
struct mbuf *mp;
|
|
int len = count * sizeof(*ia);
|
|
int offp, i;
|
|
|
|
mp = m_pulldown(m, offset, len, &offp);
|
|
if (mp == NULL) {
|
|
V_pfsyncstats.pfsyncs_badlen++;
|
|
return (-1);
|
|
}
|
|
iaa = (struct pfsync_ins_ack *)(mp->m_data + offp);
|
|
|
|
for (i = 0; i < count; i++) {
|
|
ia = &iaa[i];
|
|
|
|
st = pf_find_state_byid(ia->id, ia->creatorid);
|
|
if (st == NULL)
|
|
continue;
|
|
|
|
if (st->state_flags & PFSTATE_ACK) {
|
|
PFSYNC_LOCK(V_pfsyncif);
|
|
pfsync_undefer_state(st, 0);
|
|
PFSYNC_UNLOCK(V_pfsyncif);
|
|
}
|
|
PF_STATE_UNLOCK(st);
|
|
}
|
|
/*
|
|
* XXX this is not yet implemented, but we know the size of the
|
|
* message so we can skip it.
|
|
*/
|
|
|
|
return (count * sizeof(struct pfsync_ins_ack));
|
|
}
|
|
|
|
static int
|
|
pfsync_upd_tcp(struct pf_state *st, struct pfsync_state_peer *src,
|
|
struct pfsync_state_peer *dst)
|
|
{
|
|
int sfail = 0;
|
|
|
|
PF_STATE_LOCK_ASSERT(st);
|
|
|
|
/*
|
|
* The state should never go backwards except
|
|
* for syn-proxy states. Neither should the
|
|
* sequence window slide backwards.
|
|
*/
|
|
if (st->src.state > src->state &&
|
|
(st->src.state < PF_TCPS_PROXY_SRC ||
|
|
src->state >= PF_TCPS_PROXY_SRC))
|
|
sfail = 1;
|
|
else if (SEQ_GT(st->src.seqlo, ntohl(src->seqlo)))
|
|
sfail = 3;
|
|
else if (st->dst.state > dst->state) {
|
|
/* There might still be useful
|
|
* information about the src state here,
|
|
* so import that part of the update,
|
|
* then "fail" so we send the updated
|
|
* state back to the peer who is missing
|
|
* our what we know. */
|
|
pf_state_peer_ntoh(src, &st->src);
|
|
/* XXX do anything with timeouts? */
|
|
sfail = 7;
|
|
} else if (st->dst.state >= TCPS_SYN_SENT &&
|
|
SEQ_GT(st->dst.seqlo, ntohl(dst->seqlo)))
|
|
sfail = 4;
|
|
|
|
return (sfail);
|
|
}
|
|
|
|
static int
|
|
pfsync_in_upd(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count)
|
|
{
|
|
struct pfsync_softc *sc = V_pfsyncif;
|
|
struct pfsync_state *sa, *sp;
|
|
struct pf_state_key *sk;
|
|
struct pf_state *st;
|
|
int sfail;
|
|
|
|
struct mbuf *mp;
|
|
int len = count * sizeof(*sp);
|
|
int offp, i;
|
|
|
|
mp = m_pulldown(m, offset, len, &offp);
|
|
if (mp == NULL) {
|
|
V_pfsyncstats.pfsyncs_badlen++;
|
|
return (-1);
|
|
}
|
|
sa = (struct pfsync_state *)(mp->m_data + offp);
|
|
|
|
for (i = 0; i < count; i++) {
|
|
sp = &sa[i];
|
|
|
|
/* check for invalid values */
|
|
if (sp->timeout >= PFTM_MAX ||
|
|
sp->src.state > PF_TCPS_PROXY_DST ||
|
|
sp->dst.state > PF_TCPS_PROXY_DST) {
|
|
if (V_pf_status.debug >= PF_DEBUG_MISC) {
|
|
printf("pfsync_input: PFSYNC_ACT_UPD: "
|
|
"invalid value\n");
|
|
}
|
|
V_pfsyncstats.pfsyncs_badval++;
|
|
continue;
|
|
}
|
|
|
|
st = pf_find_state_byid(sp->id, sp->creatorid);
|
|
if (st == NULL) {
|
|
/* insert the update */
|
|
if (pfsync_state_import(sp, 0))
|
|
V_pfsyncstats.pfsyncs_badstate++;
|
|
continue;
|
|
}
|
|
|
|
if (st->state_flags & PFSTATE_ACK) {
|
|
PFSYNC_LOCK(sc);
|
|
pfsync_undefer_state(st, 1);
|
|
PFSYNC_UNLOCK(sc);
|
|
}
|
|
|
|
sk = st->key[PF_SK_WIRE]; /* XXX right one? */
|
|
sfail = 0;
|
|
if (sk->proto == IPPROTO_TCP)
|
|
sfail = pfsync_upd_tcp(st, &sp->src, &sp->dst);
|
|
else {
|
|
/*
|
|
* Non-TCP protocol state machine always go
|
|
* forwards
|
|
*/
|
|
if (st->src.state > sp->src.state)
|
|
sfail = 5;
|
|
else if (st->dst.state > sp->dst.state)
|
|
sfail = 6;
|
|
}
|
|
|
|
if (sfail) {
|
|
if (V_pf_status.debug >= PF_DEBUG_MISC) {
|
|
printf("pfsync: %s stale update (%d)"
|
|
" id: %016llx creatorid: %08x\n",
|
|
(sfail < 7 ? "ignoring" : "partial"),
|
|
sfail, (unsigned long long)be64toh(st->id),
|
|
ntohl(st->creatorid));
|
|
}
|
|
V_pfsyncstats.pfsyncs_stale++;
|
|
|
|
pfsync_update_state(st);
|
|
PF_STATE_UNLOCK(st);
|
|
PFSYNC_LOCK(sc);
|
|
pfsync_push(sc);
|
|
PFSYNC_UNLOCK(sc);
|
|
continue;
|
|
}
|
|
pfsync_alloc_scrub_memory(&sp->dst, &st->dst);
|
|
pf_state_peer_ntoh(&sp->src, &st->src);
|
|
pf_state_peer_ntoh(&sp->dst, &st->dst);
|
|
st->expire = time_uptime;
|
|
st->timeout = sp->timeout;
|
|
st->pfsync_time = time_uptime;
|
|
PF_STATE_UNLOCK(st);
|
|
}
|
|
|
|
return (len);
|
|
}
|
|
|
|
static int
|
|
pfsync_in_upd_c(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count)
|
|
{
|
|
struct pfsync_softc *sc = V_pfsyncif;
|
|
struct pfsync_upd_c *ua, *up;
|
|
struct pf_state_key *sk;
|
|
struct pf_state *st;
|
|
|
|
int len = count * sizeof(*up);
|
|
int sfail;
|
|
|
|
struct mbuf *mp;
|
|
int offp, i;
|
|
|
|
mp = m_pulldown(m, offset, len, &offp);
|
|
if (mp == NULL) {
|
|
V_pfsyncstats.pfsyncs_badlen++;
|
|
return (-1);
|
|
}
|
|
ua = (struct pfsync_upd_c *)(mp->m_data + offp);
|
|
|
|
for (i = 0; i < count; i++) {
|
|
up = &ua[i];
|
|
|
|
/* check for invalid values */
|
|
if (up->timeout >= PFTM_MAX ||
|
|
up->src.state > PF_TCPS_PROXY_DST ||
|
|
up->dst.state > PF_TCPS_PROXY_DST) {
|
|
if (V_pf_status.debug >= PF_DEBUG_MISC) {
|
|
printf("pfsync_input: "
|
|
"PFSYNC_ACT_UPD_C: "
|
|
"invalid value\n");
|
|
}
|
|
V_pfsyncstats.pfsyncs_badval++;
|
|
continue;
|
|
}
|
|
|
|
st = pf_find_state_byid(up->id, up->creatorid);
|
|
if (st == NULL) {
|
|
/* We don't have this state. Ask for it. */
|
|
PFSYNC_LOCK(sc);
|
|
pfsync_request_update(up->creatorid, up->id);
|
|
PFSYNC_UNLOCK(sc);
|
|
continue;
|
|
}
|
|
|
|
if (st->state_flags & PFSTATE_ACK) {
|
|
PFSYNC_LOCK(sc);
|
|
pfsync_undefer_state(st, 1);
|
|
PFSYNC_UNLOCK(sc);
|
|
}
|
|
|
|
sk = st->key[PF_SK_WIRE]; /* XXX right one? */
|
|
sfail = 0;
|
|
if (sk->proto == IPPROTO_TCP)
|
|
sfail = pfsync_upd_tcp(st, &up->src, &up->dst);
|
|
else {
|
|
/*
|
|
* Non-TCP protocol state machine always go forwards
|
|
*/
|
|
if (st->src.state > up->src.state)
|
|
sfail = 5;
|
|
else if (st->dst.state > up->dst.state)
|
|
sfail = 6;
|
|
}
|
|
|
|
if (sfail) {
|
|
if (V_pf_status.debug >= PF_DEBUG_MISC) {
|
|
printf("pfsync: ignoring stale update "
|
|
"(%d) id: %016llx "
|
|
"creatorid: %08x\n", sfail,
|
|
(unsigned long long)be64toh(st->id),
|
|
ntohl(st->creatorid));
|
|
}
|
|
V_pfsyncstats.pfsyncs_stale++;
|
|
|
|
pfsync_update_state(st);
|
|
PF_STATE_UNLOCK(st);
|
|
PFSYNC_LOCK(sc);
|
|
pfsync_push(sc);
|
|
PFSYNC_UNLOCK(sc);
|
|
continue;
|
|
}
|
|
pfsync_alloc_scrub_memory(&up->dst, &st->dst);
|
|
pf_state_peer_ntoh(&up->src, &st->src);
|
|
pf_state_peer_ntoh(&up->dst, &st->dst);
|
|
st->expire = time_uptime;
|
|
st->timeout = up->timeout;
|
|
st->pfsync_time = time_uptime;
|
|
PF_STATE_UNLOCK(st);
|
|
}
|
|
|
|
return (len);
|
|
}
|
|
|
|
static int
|
|
pfsync_in_ureq(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count)
|
|
{
|
|
struct pfsync_upd_req *ur, *ura;
|
|
struct mbuf *mp;
|
|
int len = count * sizeof(*ur);
|
|
int i, offp;
|
|
|
|
struct pf_state *st;
|
|
|
|
mp = m_pulldown(m, offset, len, &offp);
|
|
if (mp == NULL) {
|
|
V_pfsyncstats.pfsyncs_badlen++;
|
|
return (-1);
|
|
}
|
|
ura = (struct pfsync_upd_req *)(mp->m_data + offp);
|
|
|
|
for (i = 0; i < count; i++) {
|
|
ur = &ura[i];
|
|
|
|
if (ur->id == 0 && ur->creatorid == 0)
|
|
pfsync_bulk_start();
|
|
else {
|
|
st = pf_find_state_byid(ur->id, ur->creatorid);
|
|
if (st == NULL) {
|
|
V_pfsyncstats.pfsyncs_badstate++;
|
|
continue;
|
|
}
|
|
if (st->state_flags & PFSTATE_NOSYNC) {
|
|
PF_STATE_UNLOCK(st);
|
|
continue;
|
|
}
|
|
|
|
pfsync_update_state_req(st);
|
|
PF_STATE_UNLOCK(st);
|
|
}
|
|
}
|
|
|
|
return (len);
|
|
}
|
|
|
|
static int
|
|
pfsync_in_del(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count)
|
|
{
|
|
struct mbuf *mp;
|
|
struct pfsync_state *sa, *sp;
|
|
struct pf_state *st;
|
|
int len = count * sizeof(*sp);
|
|
int offp, i;
|
|
|
|
mp = m_pulldown(m, offset, len, &offp);
|
|
if (mp == NULL) {
|
|
V_pfsyncstats.pfsyncs_badlen++;
|
|
return (-1);
|
|
}
|
|
sa = (struct pfsync_state *)(mp->m_data + offp);
|
|
|
|
for (i = 0; i < count; i++) {
|
|
sp = &sa[i];
|
|
|
|
st = pf_find_state_byid(sp->id, sp->creatorid);
|
|
if (st == NULL) {
|
|
V_pfsyncstats.pfsyncs_badstate++;
|
|
continue;
|
|
}
|
|
st->state_flags |= PFSTATE_NOSYNC;
|
|
pf_unlink_state(st, PF_ENTER_LOCKED);
|
|
}
|
|
|
|
return (len);
|
|
}
|
|
|
|
static int
|
|
pfsync_in_del_c(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count)
|
|
{
|
|
struct mbuf *mp;
|
|
struct pfsync_del_c *sa, *sp;
|
|
struct pf_state *st;
|
|
int len = count * sizeof(*sp);
|
|
int offp, i;
|
|
|
|
mp = m_pulldown(m, offset, len, &offp);
|
|
if (mp == NULL) {
|
|
V_pfsyncstats.pfsyncs_badlen++;
|
|
return (-1);
|
|
}
|
|
sa = (struct pfsync_del_c *)(mp->m_data + offp);
|
|
|
|
for (i = 0; i < count; i++) {
|
|
sp = &sa[i];
|
|
|
|
st = pf_find_state_byid(sp->id, sp->creatorid);
|
|
if (st == NULL) {
|
|
V_pfsyncstats.pfsyncs_badstate++;
|
|
continue;
|
|
}
|
|
|
|
st->state_flags |= PFSTATE_NOSYNC;
|
|
pf_unlink_state(st, PF_ENTER_LOCKED);
|
|
}
|
|
|
|
return (len);
|
|
}
|
|
|
|
static int
|
|
pfsync_in_bus(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count)
|
|
{
|
|
struct pfsync_softc *sc = V_pfsyncif;
|
|
struct pfsync_bus *bus;
|
|
struct mbuf *mp;
|
|
int len = count * sizeof(*bus);
|
|
int offp;
|
|
|
|
PFSYNC_BLOCK(sc);
|
|
|
|
/* If we're not waiting for a bulk update, who cares. */
|
|
if (sc->sc_ureq_sent == 0) {
|
|
PFSYNC_BUNLOCK(sc);
|
|
return (len);
|
|
}
|
|
|
|
mp = m_pulldown(m, offset, len, &offp);
|
|
if (mp == NULL) {
|
|
PFSYNC_BUNLOCK(sc);
|
|
V_pfsyncstats.pfsyncs_badlen++;
|
|
return (-1);
|
|
}
|
|
bus = (struct pfsync_bus *)(mp->m_data + offp);
|
|
|
|
switch (bus->status) {
|
|
case PFSYNC_BUS_START:
|
|
callout_reset(&sc->sc_bulkfail_tmo, 4 * hz +
|
|
V_pf_limits[PF_LIMIT_STATES].limit /
|
|
((sc->sc_ifp->if_mtu - PFSYNC_MINPKT) /
|
|
sizeof(struct pfsync_state)),
|
|
pfsync_bulk_fail, sc);
|
|
if (V_pf_status.debug >= PF_DEBUG_MISC)
|
|
printf("pfsync: received bulk update start\n");
|
|
break;
|
|
|
|
case PFSYNC_BUS_END:
|
|
if (time_uptime - ntohl(bus->endtime) >=
|
|
sc->sc_ureq_sent) {
|
|
/* that's it, we're happy */
|
|
sc->sc_ureq_sent = 0;
|
|
sc->sc_bulk_tries = 0;
|
|
callout_stop(&sc->sc_bulkfail_tmo);
|
|
if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p)
|
|
(*carp_demote_adj_p)(-V_pfsync_carp_adj,
|
|
"pfsync bulk done");
|
|
sc->sc_flags |= PFSYNCF_OK;
|
|
if (V_pf_status.debug >= PF_DEBUG_MISC)
|
|
printf("pfsync: received valid "
|
|
"bulk update end\n");
|
|
} else {
|
|
if (V_pf_status.debug >= PF_DEBUG_MISC)
|
|
printf("pfsync: received invalid "
|
|
"bulk update end: bad timestamp\n");
|
|
}
|
|
break;
|
|
}
|
|
PFSYNC_BUNLOCK(sc);
|
|
|
|
return (len);
|
|
}
|
|
|
|
static int
|
|
pfsync_in_tdb(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count)
|
|
{
|
|
int len = count * sizeof(struct pfsync_tdb);
|
|
|
|
#if defined(IPSEC)
|
|
struct pfsync_tdb *tp;
|
|
struct mbuf *mp;
|
|
int offp;
|
|
int i;
|
|
int s;
|
|
|
|
mp = m_pulldown(m, offset, len, &offp);
|
|
if (mp == NULL) {
|
|
V_pfsyncstats.pfsyncs_badlen++;
|
|
return (-1);
|
|
}
|
|
tp = (struct pfsync_tdb *)(mp->m_data + offp);
|
|
|
|
for (i = 0; i < count; i++)
|
|
pfsync_update_net_tdb(&tp[i]);
|
|
#endif
|
|
|
|
return (len);
|
|
}
|
|
|
|
#if defined(IPSEC)
|
|
/* Update an in-kernel tdb. Silently fail if no tdb is found. */
|
|
static void
|
|
pfsync_update_net_tdb(struct pfsync_tdb *pt)
|
|
{
|
|
struct tdb *tdb;
|
|
int s;
|
|
|
|
/* check for invalid values */
|
|
if (ntohl(pt->spi) <= SPI_RESERVED_MAX ||
|
|
(pt->dst.sa.sa_family != AF_INET &&
|
|
pt->dst.sa.sa_family != AF_INET6))
|
|
goto bad;
|
|
|
|
tdb = gettdb(pt->spi, &pt->dst, pt->sproto);
|
|
if (tdb) {
|
|
pt->rpl = ntohl(pt->rpl);
|
|
pt->cur_bytes = (unsigned long long)be64toh(pt->cur_bytes);
|
|
|
|
/* Neither replay nor byte counter should ever decrease. */
|
|
if (pt->rpl < tdb->tdb_rpl ||
|
|
pt->cur_bytes < tdb->tdb_cur_bytes) {
|
|
goto bad;
|
|
}
|
|
|
|
tdb->tdb_rpl = pt->rpl;
|
|
tdb->tdb_cur_bytes = pt->cur_bytes;
|
|
}
|
|
return;
|
|
|
|
bad:
|
|
if (V_pf_status.debug >= PF_DEBUG_MISC)
|
|
printf("pfsync_insert: PFSYNC_ACT_TDB_UPD: "
|
|
"invalid value\n");
|
|
V_pfsyncstats.pfsyncs_badstate++;
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
|
|
static int
|
|
pfsync_in_eof(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count)
|
|
{
|
|
/* check if we are at the right place in the packet */
|
|
if (offset != m->m_pkthdr.len - sizeof(struct pfsync_eof))
|
|
V_pfsyncstats.pfsyncs_badact++;
|
|
|
|
/* we're done. free and let the caller return */
|
|
m_freem(m);
|
|
return (-1);
|
|
}
|
|
|
|
static int
|
|
pfsync_in_error(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count)
|
|
{
|
|
V_pfsyncstats.pfsyncs_badact++;
|
|
|
|
m_freem(m);
|
|
return (-1);
|
|
}
|
|
|
|
static int
|
|
pfsyncoutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
|
|
struct route *rt)
|
|
{
|
|
m_freem(m);
|
|
return (0);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static int
|
|
pfsyncioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
|
|
{
|
|
struct pfsync_softc *sc = ifp->if_softc;
|
|
struct ifreq *ifr = (struct ifreq *)data;
|
|
struct pfsyncreq pfsyncr;
|
|
int error;
|
|
|
|
switch (cmd) {
|
|
case SIOCSIFFLAGS:
|
|
PFSYNC_LOCK(sc);
|
|
if (ifp->if_flags & IFF_UP)
|
|
ifp->if_drv_flags |= IFF_DRV_RUNNING;
|
|
else
|
|
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
|
|
PFSYNC_UNLOCK(sc);
|
|
break;
|
|
case SIOCSIFMTU:
|
|
if (!sc->sc_sync_if ||
|
|
ifr->ifr_mtu <= PFSYNC_MINPKT ||
|
|
ifr->ifr_mtu > sc->sc_sync_if->if_mtu)
|
|
return (EINVAL);
|
|
if (ifr->ifr_mtu < ifp->if_mtu) {
|
|
PFSYNC_LOCK(sc);
|
|
if (sc->sc_len > PFSYNC_MINPKT)
|
|
pfsync_sendout(1);
|
|
PFSYNC_UNLOCK(sc);
|
|
}
|
|
ifp->if_mtu = ifr->ifr_mtu;
|
|
break;
|
|
case SIOCGETPFSYNC:
|
|
bzero(&pfsyncr, sizeof(pfsyncr));
|
|
PFSYNC_LOCK(sc);
|
|
if (sc->sc_sync_if) {
|
|
strlcpy(pfsyncr.pfsyncr_syncdev,
|
|
sc->sc_sync_if->if_xname, IFNAMSIZ);
|
|
}
|
|
pfsyncr.pfsyncr_syncpeer = sc->sc_sync_peer;
|
|
pfsyncr.pfsyncr_maxupdates = sc->sc_maxupdates;
|
|
pfsyncr.pfsyncr_defer = (PFSYNCF_DEFER ==
|
|
(sc->sc_flags & PFSYNCF_DEFER));
|
|
PFSYNC_UNLOCK(sc);
|
|
return (copyout(&pfsyncr, ifr->ifr_data, sizeof(pfsyncr)));
|
|
|
|
case SIOCSETPFSYNC:
|
|
{
|
|
struct ip_moptions *imo = &sc->sc_imo;
|
|
struct ifnet *sifp;
|
|
struct ip *ip;
|
|
void *mship = NULL;
|
|
|
|
if ((error = priv_check(curthread, PRIV_NETINET_PF)) != 0)
|
|
return (error);
|
|
if ((error = copyin(ifr->ifr_data, &pfsyncr, sizeof(pfsyncr))))
|
|
return (error);
|
|
|
|
if (pfsyncr.pfsyncr_maxupdates > 255)
|
|
return (EINVAL);
|
|
|
|
if (pfsyncr.pfsyncr_syncdev[0] == 0)
|
|
sifp = NULL;
|
|
else if ((sifp = ifunit_ref(pfsyncr.pfsyncr_syncdev)) == NULL)
|
|
return (EINVAL);
|
|
|
|
if (pfsyncr.pfsyncr_syncpeer.s_addr == 0 && sifp != NULL)
|
|
mship = malloc((sizeof(struct in_multi *) *
|
|
IP_MIN_MEMBERSHIPS), M_PFSYNC, M_WAITOK | M_ZERO);
|
|
|
|
PFSYNC_LOCK(sc);
|
|
if (pfsyncr.pfsyncr_syncpeer.s_addr == 0)
|
|
sc->sc_sync_peer.s_addr = htonl(INADDR_PFSYNC_GROUP);
|
|
else
|
|
sc->sc_sync_peer.s_addr =
|
|
pfsyncr.pfsyncr_syncpeer.s_addr;
|
|
|
|
sc->sc_maxupdates = pfsyncr.pfsyncr_maxupdates;
|
|
if (pfsyncr.pfsyncr_defer) {
|
|
sc->sc_flags |= PFSYNCF_DEFER;
|
|
pfsync_defer_ptr = pfsync_defer;
|
|
} else {
|
|
sc->sc_flags &= ~PFSYNCF_DEFER;
|
|
pfsync_defer_ptr = NULL;
|
|
}
|
|
|
|
if (sifp == NULL) {
|
|
if (sc->sc_sync_if)
|
|
if_rele(sc->sc_sync_if);
|
|
sc->sc_sync_if = NULL;
|
|
if (imo->imo_membership)
|
|
pfsync_multicast_cleanup(sc);
|
|
PFSYNC_UNLOCK(sc);
|
|
break;
|
|
}
|
|
|
|
if (sc->sc_len > PFSYNC_MINPKT &&
|
|
(sifp->if_mtu < sc->sc_ifp->if_mtu ||
|
|
(sc->sc_sync_if != NULL &&
|
|
sifp->if_mtu < sc->sc_sync_if->if_mtu) ||
|
|
sifp->if_mtu < MCLBYTES - sizeof(struct ip)))
|
|
pfsync_sendout(1);
|
|
|
|
if (imo->imo_membership)
|
|
pfsync_multicast_cleanup(sc);
|
|
|
|
if (sc->sc_sync_peer.s_addr == htonl(INADDR_PFSYNC_GROUP)) {
|
|
error = pfsync_multicast_setup(sc, sifp, mship);
|
|
if (error) {
|
|
if_rele(sifp);
|
|
free(mship, M_PFSYNC);
|
|
return (error);
|
|
}
|
|
}
|
|
if (sc->sc_sync_if)
|
|
if_rele(sc->sc_sync_if);
|
|
sc->sc_sync_if = sifp;
|
|
|
|
ip = &sc->sc_template;
|
|
bzero(ip, sizeof(*ip));
|
|
ip->ip_v = IPVERSION;
|
|
ip->ip_hl = sizeof(sc->sc_template) >> 2;
|
|
ip->ip_tos = IPTOS_LOWDELAY;
|
|
/* len and id are set later. */
|
|
ip->ip_off = IP_DF;
|
|
ip->ip_ttl = PFSYNC_DFLTTL;
|
|
ip->ip_p = IPPROTO_PFSYNC;
|
|
ip->ip_src.s_addr = INADDR_ANY;
|
|
ip->ip_dst.s_addr = sc->sc_sync_peer.s_addr;
|
|
|
|
/* Request a full state table update. */
|
|
if ((sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p)
|
|
(*carp_demote_adj_p)(V_pfsync_carp_adj,
|
|
"pfsync bulk start");
|
|
sc->sc_flags &= ~PFSYNCF_OK;
|
|
if (V_pf_status.debug >= PF_DEBUG_MISC)
|
|
printf("pfsync: requesting bulk update\n");
|
|
pfsync_request_update(0, 0);
|
|
PFSYNC_UNLOCK(sc);
|
|
PFSYNC_BLOCK(sc);
|
|
sc->sc_ureq_sent = time_uptime;
|
|
callout_reset(&sc->sc_bulkfail_tmo, 5 * hz, pfsync_bulk_fail,
|
|
sc);
|
|
PFSYNC_BUNLOCK(sc);
|
|
|
|
break;
|
|
}
|
|
default:
|
|
return (ENOTTY);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
pfsync_out_state(struct pf_state *st, struct mbuf *m, int offset)
|
|
{
|
|
struct pfsync_state *sp = (struct pfsync_state *)(m->m_data + offset);
|
|
|
|
pfsync_state_export(sp, st);
|
|
|
|
return (sizeof(*sp));
|
|
}
|
|
|
|
static int
|
|
pfsync_out_iack(struct pf_state *st, struct mbuf *m, int offset)
|
|
{
|
|
struct pfsync_ins_ack *iack =
|
|
(struct pfsync_ins_ack *)(m->m_data + offset);
|
|
|
|
iack->id = st->id;
|
|
iack->creatorid = st->creatorid;
|
|
|
|
return (sizeof(*iack));
|
|
}
|
|
|
|
static int
|
|
pfsync_out_upd_c(struct pf_state *st, struct mbuf *m, int offset)
|
|
{
|
|
struct pfsync_upd_c *up = (struct pfsync_upd_c *)(m->m_data + offset);
|
|
|
|
bzero(up, sizeof(*up));
|
|
up->id = st->id;
|
|
pf_state_peer_hton(&st->src, &up->src);
|
|
pf_state_peer_hton(&st->dst, &up->dst);
|
|
up->creatorid = st->creatorid;
|
|
up->timeout = st->timeout;
|
|
|
|
return (sizeof(*up));
|
|
}
|
|
|
|
static int
|
|
pfsync_out_del(struct pf_state *st, struct mbuf *m, int offset)
|
|
{
|
|
struct pfsync_del_c *dp = (struct pfsync_del_c *)(m->m_data + offset);
|
|
|
|
dp->id = st->id;
|
|
dp->creatorid = st->creatorid;
|
|
|
|
st->state_flags |= PFSTATE_NOSYNC;
|
|
|
|
return (sizeof(*dp));
|
|
}
|
|
|
|
static void
|
|
pfsync_drop(struct pfsync_softc *sc)
|
|
{
|
|
struct pf_state *st, *next;
|
|
struct pfsync_upd_req_item *ur;
|
|
int q;
|
|
|
|
for (q = 0; q < PFSYNC_S_COUNT; q++) {
|
|
if (TAILQ_EMPTY(&sc->sc_qs[q]))
|
|
continue;
|
|
|
|
TAILQ_FOREACH_SAFE(st, &sc->sc_qs[q], sync_list, next) {
|
|
KASSERT(st->sync_state == q,
|
|
("%s: st->sync_state == q",
|
|
__func__));
|
|
st->sync_state = PFSYNC_S_NONE;
|
|
pf_release_state(st);
|
|
}
|
|
TAILQ_INIT(&sc->sc_qs[q]);
|
|
}
|
|
|
|
while ((ur = TAILQ_FIRST(&sc->sc_upd_req_list)) != NULL) {
|
|
TAILQ_REMOVE(&sc->sc_upd_req_list, ur, ur_entry);
|
|
free(ur, M_PFSYNC);
|
|
}
|
|
|
|
sc->sc_plus = NULL;
|
|
sc->sc_len = PFSYNC_MINPKT;
|
|
}
|
|
|
|
static void
|
|
pfsync_sendout(int schedswi)
|
|
{
|
|
struct pfsync_softc *sc = V_pfsyncif;
|
|
struct ifnet *ifp = sc->sc_ifp;
|
|
struct mbuf *m;
|
|
struct ip *ip;
|
|
struct pfsync_header *ph;
|
|
struct pfsync_subheader *subh;
|
|
struct pf_state *st, *next;
|
|
struct pfsync_upd_req_item *ur;
|
|
int offset;
|
|
int q, count = 0;
|
|
|
|
KASSERT(sc != NULL, ("%s: null sc", __func__));
|
|
KASSERT(sc->sc_len > PFSYNC_MINPKT,
|
|
("%s: sc_len %zu", __func__, sc->sc_len));
|
|
PFSYNC_LOCK_ASSERT(sc);
|
|
|
|
if (ifp->if_bpf == NULL && sc->sc_sync_if == NULL) {
|
|
pfsync_drop(sc);
|
|
return;
|
|
}
|
|
|
|
m = m_get2(M_NOWAIT, MT_DATA, M_PKTHDR, max_linkhdr + sc->sc_len);
|
|
if (m == NULL) {
|
|
sc->sc_ifp->if_oerrors++;
|
|
V_pfsyncstats.pfsyncs_onomem++;
|
|
return;
|
|
}
|
|
m->m_data += max_linkhdr;
|
|
m->m_len = m->m_pkthdr.len = sc->sc_len;
|
|
|
|
/* build the ip header */
|
|
ip = (struct ip *)m->m_data;
|
|
bcopy(&sc->sc_template, ip, sizeof(*ip));
|
|
offset = sizeof(*ip);
|
|
|
|
ip->ip_len = m->m_pkthdr.len;
|
|
ip->ip_id = htons(ip_randomid());
|
|
|
|
/* build the pfsync header */
|
|
ph = (struct pfsync_header *)(m->m_data + offset);
|
|
bzero(ph, sizeof(*ph));
|
|
offset += sizeof(*ph);
|
|
|
|
ph->version = PFSYNC_VERSION;
|
|
ph->len = htons(sc->sc_len - sizeof(*ip));
|
|
bcopy(V_pf_status.pf_chksum, ph->pfcksum, PF_MD5_DIGEST_LENGTH);
|
|
|
|
/* walk the queues */
|
|
for (q = 0; q < PFSYNC_S_COUNT; q++) {
|
|
if (TAILQ_EMPTY(&sc->sc_qs[q]))
|
|
continue;
|
|
|
|
subh = (struct pfsync_subheader *)(m->m_data + offset);
|
|
offset += sizeof(*subh);
|
|
|
|
count = 0;
|
|
TAILQ_FOREACH_SAFE(st, &sc->sc_qs[q], sync_list, next) {
|
|
KASSERT(st->sync_state == q,
|
|
("%s: st->sync_state == q",
|
|
__func__));
|
|
/*
|
|
* XXXGL: some of write methods do unlocked reads
|
|
* of state data :(
|
|
*/
|
|
offset += pfsync_qs[q].write(st, m, offset);
|
|
st->sync_state = PFSYNC_S_NONE;
|
|
pf_release_state(st);
|
|
count++;
|
|
}
|
|
TAILQ_INIT(&sc->sc_qs[q]);
|
|
|
|
bzero(subh, sizeof(*subh));
|
|
subh->action = pfsync_qs[q].action;
|
|
subh->count = htons(count);
|
|
V_pfsyncstats.pfsyncs_oacts[pfsync_qs[q].action] += count;
|
|
}
|
|
|
|
if (!TAILQ_EMPTY(&sc->sc_upd_req_list)) {
|
|
subh = (struct pfsync_subheader *)(m->m_data + offset);
|
|
offset += sizeof(*subh);
|
|
|
|
count = 0;
|
|
while ((ur = TAILQ_FIRST(&sc->sc_upd_req_list)) != NULL) {
|
|
TAILQ_REMOVE(&sc->sc_upd_req_list, ur, ur_entry);
|
|
|
|
bcopy(&ur->ur_msg, m->m_data + offset,
|
|
sizeof(ur->ur_msg));
|
|
offset += sizeof(ur->ur_msg);
|
|
free(ur, M_PFSYNC);
|
|
count++;
|
|
}
|
|
|
|
bzero(subh, sizeof(*subh));
|
|
subh->action = PFSYNC_ACT_UPD_REQ;
|
|
subh->count = htons(count);
|
|
V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_UPD_REQ] += count;
|
|
}
|
|
|
|
/* has someone built a custom region for us to add? */
|
|
if (sc->sc_plus != NULL) {
|
|
bcopy(sc->sc_plus, m->m_data + offset, sc->sc_pluslen);
|
|
offset += sc->sc_pluslen;
|
|
|
|
sc->sc_plus = NULL;
|
|
}
|
|
|
|
subh = (struct pfsync_subheader *)(m->m_data + offset);
|
|
offset += sizeof(*subh);
|
|
|
|
bzero(subh, sizeof(*subh));
|
|
subh->action = PFSYNC_ACT_EOF;
|
|
subh->count = htons(1);
|
|
V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_EOF]++;
|
|
|
|
/* XXX write checksum in EOF here */
|
|
|
|
/* we're done, let's put it on the wire */
|
|
if (ifp->if_bpf) {
|
|
m->m_data += sizeof(*ip);
|
|
m->m_len = m->m_pkthdr.len = sc->sc_len - sizeof(*ip);
|
|
BPF_MTAP(ifp, m);
|
|
m->m_data -= sizeof(*ip);
|
|
m->m_len = m->m_pkthdr.len = sc->sc_len;
|
|
}
|
|
|
|
if (sc->sc_sync_if == NULL) {
|
|
sc->sc_len = PFSYNC_MINPKT;
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
sc->sc_ifp->if_opackets++;
|
|
sc->sc_ifp->if_obytes += m->m_pkthdr.len;
|
|
sc->sc_len = PFSYNC_MINPKT;
|
|
|
|
if (!_IF_QFULL(&sc->sc_ifp->if_snd))
|
|
_IF_ENQUEUE(&sc->sc_ifp->if_snd, m);
|
|
else {
|
|
m_freem(m);
|
|
sc->sc_ifp->if_snd.ifq_drops++;
|
|
}
|
|
if (schedswi)
|
|
swi_sched(V_pfsync_swi_cookie, 0);
|
|
}
|
|
|
|
static void
|
|
pfsync_insert_state(struct pf_state *st)
|
|
{
|
|
struct pfsync_softc *sc = V_pfsyncif;
|
|
|
|
if (st->state_flags & PFSTATE_NOSYNC)
|
|
return;
|
|
|
|
if ((st->rule.ptr->rule_flag & PFRULE_NOSYNC) ||
|
|
st->key[PF_SK_WIRE]->proto == IPPROTO_PFSYNC) {
|
|
st->state_flags |= PFSTATE_NOSYNC;
|
|
return;
|
|
}
|
|
|
|
KASSERT(st->sync_state == PFSYNC_S_NONE,
|
|
("%s: st->sync_state == PFSYNC_S_NONE", __func__));
|
|
|
|
PFSYNC_LOCK(sc);
|
|
if (sc->sc_len == PFSYNC_MINPKT)
|
|
callout_reset(&sc->sc_tmo, 1 * hz, pfsync_timeout, V_pfsyncif);
|
|
|
|
pfsync_q_ins(st, PFSYNC_S_INS);
|
|
PFSYNC_UNLOCK(sc);
|
|
|
|
st->sync_updates = 0;
|
|
}
|
|
|
|
static int
|
|
pfsync_defer(struct pf_state *st, struct mbuf *m)
|
|
{
|
|
struct pfsync_softc *sc = V_pfsyncif;
|
|
struct pfsync_deferral *pd;
|
|
|
|
if (m->m_flags & (M_BCAST|M_MCAST))
|
|
return (0);
|
|
|
|
PFSYNC_LOCK(sc);
|
|
|
|
if (sc == NULL || !(sc->sc_ifp->if_flags & IFF_DRV_RUNNING) ||
|
|
!(sc->sc_flags & PFSYNCF_DEFER)) {
|
|
PFSYNC_UNLOCK(sc);
|
|
return (0);
|
|
}
|
|
|
|
if (sc->sc_deferred >= 128)
|
|
pfsync_undefer(TAILQ_FIRST(&sc->sc_deferrals), 0);
|
|
|
|
pd = malloc(sizeof(*pd), M_PFSYNC, M_NOWAIT);
|
|
if (pd == NULL)
|
|
return (0);
|
|
sc->sc_deferred++;
|
|
|
|
m->m_flags |= M_SKIP_FIREWALL;
|
|
st->state_flags |= PFSTATE_ACK;
|
|
|
|
pd->pd_sc = sc;
|
|
pd->pd_refs = 0;
|
|
pd->pd_st = st;
|
|
pf_ref_state(st);
|
|
pd->pd_m = m;
|
|
|
|
TAILQ_INSERT_TAIL(&sc->sc_deferrals, pd, pd_entry);
|
|
callout_init_mtx(&pd->pd_tmo, &sc->sc_mtx, CALLOUT_RETURNUNLOCKED);
|
|
callout_reset(&pd->pd_tmo, 10, pfsync_defer_tmo, pd);
|
|
|
|
pfsync_push(sc);
|
|
|
|
return (1);
|
|
}
|
|
|
|
static void
|
|
pfsync_undefer(struct pfsync_deferral *pd, int drop)
|
|
{
|
|
struct pfsync_softc *sc = pd->pd_sc;
|
|
struct mbuf *m = pd->pd_m;
|
|
struct pf_state *st = pd->pd_st;
|
|
|
|
PFSYNC_LOCK_ASSERT(sc);
|
|
|
|
TAILQ_REMOVE(&sc->sc_deferrals, pd, pd_entry);
|
|
sc->sc_deferred--;
|
|
pd->pd_st->state_flags &= ~PFSTATE_ACK; /* XXX: locking! */
|
|
free(pd, M_PFSYNC);
|
|
pf_release_state(st);
|
|
|
|
if (drop)
|
|
m_freem(m);
|
|
else {
|
|
_IF_ENQUEUE(&sc->sc_ifp->if_snd, m);
|
|
pfsync_push(sc);
|
|
}
|
|
}
|
|
|
|
static void
|
|
pfsync_defer_tmo(void *arg)
|
|
{
|
|
struct pfsync_deferral *pd = arg;
|
|
struct pfsync_softc *sc = pd->pd_sc;
|
|
struct mbuf *m = pd->pd_m;
|
|
struct pf_state *st = pd->pd_st;
|
|
|
|
PFSYNC_LOCK_ASSERT(sc);
|
|
|
|
CURVNET_SET(m->m_pkthdr.rcvif->if_vnet);
|
|
|
|
TAILQ_REMOVE(&sc->sc_deferrals, pd, pd_entry);
|
|
sc->sc_deferred--;
|
|
pd->pd_st->state_flags &= ~PFSTATE_ACK; /* XXX: locking! */
|
|
if (pd->pd_refs == 0)
|
|
free(pd, M_PFSYNC);
|
|
PFSYNC_UNLOCK(sc);
|
|
|
|
ip_output(m, NULL, NULL, 0, NULL, NULL);
|
|
|
|
pf_release_state(st);
|
|
|
|
CURVNET_RESTORE();
|
|
}
|
|
|
|
static void
|
|
pfsync_undefer_state(struct pf_state *st, int drop)
|
|
{
|
|
struct pfsync_softc *sc = V_pfsyncif;
|
|
struct pfsync_deferral *pd;
|
|
|
|
PFSYNC_LOCK_ASSERT(sc);
|
|
|
|
TAILQ_FOREACH(pd, &sc->sc_deferrals, pd_entry) {
|
|
if (pd->pd_st == st) {
|
|
if (callout_stop(&pd->pd_tmo))
|
|
pfsync_undefer(pd, drop);
|
|
return;
|
|
}
|
|
}
|
|
|
|
panic("%s: unable to find deferred state", __func__);
|
|
}
|
|
|
|
static void
|
|
pfsync_update_state(struct pf_state *st)
|
|
{
|
|
struct pfsync_softc *sc = V_pfsyncif;
|
|
int sync = 0;
|
|
|
|
PF_STATE_LOCK_ASSERT(st);
|
|
PFSYNC_LOCK(sc);
|
|
|
|
if (st->state_flags & PFSTATE_ACK)
|
|
pfsync_undefer_state(st, 0);
|
|
if (st->state_flags & PFSTATE_NOSYNC) {
|
|
if (st->sync_state != PFSYNC_S_NONE)
|
|
pfsync_q_del(st);
|
|
PFSYNC_UNLOCK(sc);
|
|
return;
|
|
}
|
|
|
|
if (sc->sc_len == PFSYNC_MINPKT)
|
|
callout_reset(&sc->sc_tmo, 1 * hz, pfsync_timeout, V_pfsyncif);
|
|
|
|
switch (st->sync_state) {
|
|
case PFSYNC_S_UPD_C:
|
|
case PFSYNC_S_UPD:
|
|
case PFSYNC_S_INS:
|
|
/* we're already handling it */
|
|
|
|
if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) {
|
|
st->sync_updates++;
|
|
if (st->sync_updates >= sc->sc_maxupdates)
|
|
sync = 1;
|
|
}
|
|
break;
|
|
|
|
case PFSYNC_S_IACK:
|
|
pfsync_q_del(st);
|
|
case PFSYNC_S_NONE:
|
|
pfsync_q_ins(st, PFSYNC_S_UPD_C);
|
|
st->sync_updates = 0;
|
|
break;
|
|
|
|
default:
|
|
panic("%s: unexpected sync state %d", __func__, st->sync_state);
|
|
}
|
|
|
|
if (sync || (time_uptime - st->pfsync_time) < 2)
|
|
pfsync_push(sc);
|
|
|
|
PFSYNC_UNLOCK(sc);
|
|
}
|
|
|
|
static void
|
|
pfsync_request_update(u_int32_t creatorid, u_int64_t id)
|
|
{
|
|
struct pfsync_softc *sc = V_pfsyncif;
|
|
struct pfsync_upd_req_item *item;
|
|
size_t nlen = sizeof(struct pfsync_upd_req);
|
|
|
|
PFSYNC_LOCK_ASSERT(sc);
|
|
|
|
/*
|
|
* This code does nothing to prevent multiple update requests for the
|
|
* same state being generated.
|
|
*/
|
|
item = malloc(sizeof(*item), M_PFSYNC, M_NOWAIT);
|
|
if (item == NULL)
|
|
return; /* XXX stats */
|
|
|
|
item->ur_msg.id = id;
|
|
item->ur_msg.creatorid = creatorid;
|
|
|
|
if (TAILQ_EMPTY(&sc->sc_upd_req_list))
|
|
nlen += sizeof(struct pfsync_subheader);
|
|
|
|
if (sc->sc_len + nlen > sc->sc_ifp->if_mtu) {
|
|
pfsync_sendout(1);
|
|
|
|
nlen = sizeof(struct pfsync_subheader) +
|
|
sizeof(struct pfsync_upd_req);
|
|
}
|
|
|
|
TAILQ_INSERT_TAIL(&sc->sc_upd_req_list, item, ur_entry);
|
|
sc->sc_len += nlen;
|
|
|
|
pfsync_push(sc);
|
|
}
|
|
|
|
static void
|
|
pfsync_update_state_req(struct pf_state *st)
|
|
{
|
|
struct pfsync_softc *sc = V_pfsyncif;
|
|
|
|
PF_STATE_LOCK_ASSERT(st);
|
|
PFSYNC_LOCK(sc);
|
|
|
|
if (st->state_flags & PFSTATE_NOSYNC) {
|
|
if (st->sync_state != PFSYNC_S_NONE)
|
|
pfsync_q_del(st);
|
|
PFSYNC_UNLOCK(sc);
|
|
return;
|
|
}
|
|
|
|
switch (st->sync_state) {
|
|
case PFSYNC_S_UPD_C:
|
|
case PFSYNC_S_IACK:
|
|
pfsync_q_del(st);
|
|
case PFSYNC_S_NONE:
|
|
pfsync_q_ins(st, PFSYNC_S_UPD);
|
|
pfsync_push(sc);
|
|
break;
|
|
|
|
case PFSYNC_S_INS:
|
|
case PFSYNC_S_UPD:
|
|
case PFSYNC_S_DEL:
|
|
/* we're already handling it */
|
|
break;
|
|
|
|
default:
|
|
panic("%s: unexpected sync state %d", __func__, st->sync_state);
|
|
}
|
|
|
|
PFSYNC_UNLOCK(sc);
|
|
}
|
|
|
|
static void
|
|
pfsync_delete_state(struct pf_state *st)
|
|
{
|
|
struct pfsync_softc *sc = V_pfsyncif;
|
|
|
|
PFSYNC_LOCK(sc);
|
|
if (st->state_flags & PFSTATE_ACK)
|
|
pfsync_undefer_state(st, 1);
|
|
if (st->state_flags & PFSTATE_NOSYNC) {
|
|
if (st->sync_state != PFSYNC_S_NONE)
|
|
pfsync_q_del(st);
|
|
PFSYNC_UNLOCK(sc);
|
|
return;
|
|
}
|
|
|
|
if (sc->sc_len == PFSYNC_MINPKT)
|
|
callout_reset(&sc->sc_tmo, 1 * hz, pfsync_timeout, V_pfsyncif);
|
|
|
|
switch (st->sync_state) {
|
|
case PFSYNC_S_INS:
|
|
/* We never got to tell the world so just forget about it. */
|
|
pfsync_q_del(st);
|
|
break;
|
|
|
|
case PFSYNC_S_UPD_C:
|
|
case PFSYNC_S_UPD:
|
|
case PFSYNC_S_IACK:
|
|
pfsync_q_del(st);
|
|
/* FALLTHROUGH to putting it on the del list */
|
|
|
|
case PFSYNC_S_NONE:
|
|
pfsync_q_ins(st, PFSYNC_S_DEL);
|
|
break;
|
|
|
|
default:
|
|
panic("%s: unexpected sync state %d", __func__, st->sync_state);
|
|
}
|
|
PFSYNC_UNLOCK(sc);
|
|
}
|
|
|
|
static void
|
|
pfsync_clear_states(u_int32_t creatorid, const char *ifname)
|
|
{
|
|
struct pfsync_softc *sc = V_pfsyncif;
|
|
struct {
|
|
struct pfsync_subheader subh;
|
|
struct pfsync_clr clr;
|
|
} __packed r;
|
|
|
|
bzero(&r, sizeof(r));
|
|
|
|
r.subh.action = PFSYNC_ACT_CLR;
|
|
r.subh.count = htons(1);
|
|
V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_CLR]++;
|
|
|
|
strlcpy(r.clr.ifname, ifname, sizeof(r.clr.ifname));
|
|
r.clr.creatorid = creatorid;
|
|
|
|
PFSYNC_LOCK(sc);
|
|
pfsync_send_plus(&r, sizeof(r));
|
|
PFSYNC_UNLOCK(sc);
|
|
}
|
|
|
|
static void
|
|
pfsync_q_ins(struct pf_state *st, int q)
|
|
{
|
|
struct pfsync_softc *sc = V_pfsyncif;
|
|
size_t nlen = pfsync_qs[q].len;
|
|
|
|
PFSYNC_LOCK_ASSERT(sc);
|
|
|
|
KASSERT(st->sync_state == PFSYNC_S_NONE,
|
|
("%s: st->sync_state == PFSYNC_S_NONE", __func__));
|
|
KASSERT(sc->sc_len >= PFSYNC_MINPKT, ("pfsync pkt len is too low %zu",
|
|
sc->sc_len));
|
|
|
|
if (TAILQ_EMPTY(&sc->sc_qs[q]))
|
|
nlen += sizeof(struct pfsync_subheader);
|
|
|
|
if (sc->sc_len + nlen > sc->sc_ifp->if_mtu) {
|
|
pfsync_sendout(1);
|
|
|
|
nlen = sizeof(struct pfsync_subheader) + pfsync_qs[q].len;
|
|
}
|
|
|
|
sc->sc_len += nlen;
|
|
TAILQ_INSERT_TAIL(&sc->sc_qs[q], st, sync_list);
|
|
st->sync_state = q;
|
|
pf_ref_state(st);
|
|
}
|
|
|
|
static void
|
|
pfsync_q_del(struct pf_state *st)
|
|
{
|
|
struct pfsync_softc *sc = V_pfsyncif;
|
|
int q = st->sync_state;
|
|
|
|
PFSYNC_LOCK_ASSERT(sc);
|
|
KASSERT(st->sync_state != PFSYNC_S_NONE,
|
|
("%s: st->sync_state != PFSYNC_S_NONE", __func__));
|
|
|
|
sc->sc_len -= pfsync_qs[q].len;
|
|
TAILQ_REMOVE(&sc->sc_qs[q], st, sync_list);
|
|
st->sync_state = PFSYNC_S_NONE;
|
|
pf_release_state(st);
|
|
|
|
if (TAILQ_EMPTY(&sc->sc_qs[q]))
|
|
sc->sc_len -= sizeof(struct pfsync_subheader);
|
|
}
|
|
|
|
static void
|
|
pfsync_bulk_start(void)
|
|
{
|
|
struct pfsync_softc *sc = V_pfsyncif;
|
|
|
|
if (V_pf_status.debug >= PF_DEBUG_MISC)
|
|
printf("pfsync: received bulk update request\n");
|
|
|
|
PFSYNC_BLOCK(sc);
|
|
|
|
sc->sc_ureq_received = time_uptime;
|
|
sc->sc_bulk_hashid = 0;
|
|
sc->sc_bulk_stateid = 0;
|
|
pfsync_bulk_status(PFSYNC_BUS_START);
|
|
callout_reset(&sc->sc_bulk_tmo, 1, pfsync_bulk_update, sc);
|
|
PFSYNC_BUNLOCK(sc);
|
|
}
|
|
|
|
static void
|
|
pfsync_bulk_update(void *arg)
|
|
{
|
|
struct pfsync_softc *sc = arg;
|
|
struct pf_state *s;
|
|
int i, sent = 0;
|
|
|
|
PFSYNC_BLOCK_ASSERT(sc);
|
|
CURVNET_SET(sc->sc_ifp->if_vnet);
|
|
|
|
/*
|
|
* Start with last state from previous invocation.
|
|
* It may had gone, in this case start from the
|
|
* hash slot.
|
|
*/
|
|
s = pf_find_state_byid(sc->sc_bulk_stateid, sc->sc_bulk_creatorid);
|
|
|
|
if (s != NULL)
|
|
i = PF_IDHASH(s);
|
|
else
|
|
i = sc->sc_bulk_hashid;
|
|
|
|
for (; i <= V_pf_hashmask; i++) {
|
|
struct pf_idhash *ih = &V_pf_idhash[i];
|
|
|
|
if (s != NULL)
|
|
PF_HASHROW_ASSERT(ih);
|
|
else {
|
|
PF_HASHROW_LOCK(ih);
|
|
s = LIST_FIRST(&ih->states);
|
|
}
|
|
|
|
for (; s; s = LIST_NEXT(s, entry)) {
|
|
|
|
if (sent > 1 && (sc->sc_ifp->if_mtu - sc->sc_len) <
|
|
sizeof(struct pfsync_state)) {
|
|
/* We've filled a packet. */
|
|
sc->sc_bulk_hashid = i;
|
|
sc->sc_bulk_stateid = s->id;
|
|
sc->sc_bulk_creatorid = s->creatorid;
|
|
PF_HASHROW_UNLOCK(ih);
|
|
callout_reset(&sc->sc_bulk_tmo, 1,
|
|
pfsync_bulk_update, sc);
|
|
goto full;
|
|
}
|
|
|
|
if (s->sync_state == PFSYNC_S_NONE &&
|
|
s->timeout < PFTM_MAX &&
|
|
s->pfsync_time <= sc->sc_ureq_received) {
|
|
PFSYNC_LOCK(sc);
|
|
pfsync_update_state_req(s);
|
|
PFSYNC_UNLOCK(sc);
|
|
sent++;
|
|
}
|
|
}
|
|
PF_HASHROW_UNLOCK(ih);
|
|
}
|
|
|
|
/* We're done. */
|
|
pfsync_bulk_status(PFSYNC_BUS_END);
|
|
|
|
full:
|
|
CURVNET_RESTORE();
|
|
}
|
|
|
|
static void
|
|
pfsync_bulk_status(u_int8_t status)
|
|
{
|
|
struct {
|
|
struct pfsync_subheader subh;
|
|
struct pfsync_bus bus;
|
|
} __packed r;
|
|
|
|
struct pfsync_softc *sc = V_pfsyncif;
|
|
|
|
bzero(&r, sizeof(r));
|
|
|
|
r.subh.action = PFSYNC_ACT_BUS;
|
|
r.subh.count = htons(1);
|
|
V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_BUS]++;
|
|
|
|
r.bus.creatorid = V_pf_status.hostid;
|
|
r.bus.endtime = htonl(time_uptime - sc->sc_ureq_received);
|
|
r.bus.status = status;
|
|
|
|
PFSYNC_LOCK(sc);
|
|
pfsync_send_plus(&r, sizeof(r));
|
|
PFSYNC_UNLOCK(sc);
|
|
}
|
|
|
|
static void
|
|
pfsync_bulk_fail(void *arg)
|
|
{
|
|
struct pfsync_softc *sc = arg;
|
|
|
|
CURVNET_SET(sc->sc_ifp->if_vnet);
|
|
|
|
PFSYNC_BLOCK_ASSERT(sc);
|
|
|
|
if (sc->sc_bulk_tries++ < PFSYNC_MAX_BULKTRIES) {
|
|
/* Try again */
|
|
callout_reset(&sc->sc_bulkfail_tmo, 5 * hz,
|
|
pfsync_bulk_fail, V_pfsyncif);
|
|
PFSYNC_LOCK(sc);
|
|
pfsync_request_update(0, 0);
|
|
PFSYNC_UNLOCK(sc);
|
|
} else {
|
|
/* Pretend like the transfer was ok. */
|
|
sc->sc_ureq_sent = 0;
|
|
sc->sc_bulk_tries = 0;
|
|
PFSYNC_LOCK(sc);
|
|
if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p)
|
|
(*carp_demote_adj_p)(-V_pfsync_carp_adj,
|
|
"pfsync bulk fail");
|
|
sc->sc_flags |= PFSYNCF_OK;
|
|
PFSYNC_UNLOCK(sc);
|
|
if (V_pf_status.debug >= PF_DEBUG_MISC)
|
|
printf("pfsync: failed to receive bulk update\n");
|
|
}
|
|
|
|
CURVNET_RESTORE();
|
|
}
|
|
|
|
static void
|
|
pfsync_send_plus(void *plus, size_t pluslen)
|
|
{
|
|
struct pfsync_softc *sc = V_pfsyncif;
|
|
|
|
PFSYNC_LOCK_ASSERT(sc);
|
|
|
|
if (sc->sc_len + pluslen > sc->sc_ifp->if_mtu)
|
|
pfsync_sendout(1);
|
|
|
|
sc->sc_plus = plus;
|
|
sc->sc_len += (sc->sc_pluslen = pluslen);
|
|
|
|
pfsync_sendout(1);
|
|
}
|
|
|
|
static void
|
|
pfsync_timeout(void *arg)
|
|
{
|
|
struct pfsync_softc *sc = arg;
|
|
|
|
CURVNET_SET(sc->sc_ifp->if_vnet);
|
|
PFSYNC_LOCK(sc);
|
|
pfsync_push(sc);
|
|
PFSYNC_UNLOCK(sc);
|
|
CURVNET_RESTORE();
|
|
}
|
|
|
|
static void
|
|
pfsync_push(struct pfsync_softc *sc)
|
|
{
|
|
|
|
PFSYNC_LOCK_ASSERT(sc);
|
|
|
|
sc->sc_flags |= PFSYNCF_PUSH;
|
|
swi_sched(V_pfsync_swi_cookie, 0);
|
|
}
|
|
|
|
static void
|
|
pfsyncintr(void *arg)
|
|
{
|
|
struct pfsync_softc *sc = arg;
|
|
struct mbuf *m, *n;
|
|
|
|
CURVNET_SET(sc->sc_ifp->if_vnet);
|
|
|
|
PFSYNC_LOCK(sc);
|
|
if ((sc->sc_flags & PFSYNCF_PUSH) && sc->sc_len > PFSYNC_MINPKT) {
|
|
pfsync_sendout(0);
|
|
sc->sc_flags &= ~PFSYNCF_PUSH;
|
|
}
|
|
_IF_DEQUEUE_ALL(&sc->sc_ifp->if_snd, m);
|
|
PFSYNC_UNLOCK(sc);
|
|
|
|
for (; m != NULL; m = n) {
|
|
|
|
n = m->m_nextpkt;
|
|
m->m_nextpkt = NULL;
|
|
|
|
/*
|
|
* We distinguish between a deferral packet and our
|
|
* own pfsync packet based on M_SKIP_FIREWALL
|
|
* flag. This is XXX.
|
|
*/
|
|
if (m->m_flags & M_SKIP_FIREWALL)
|
|
ip_output(m, NULL, NULL, 0, NULL, NULL);
|
|
else if (ip_output(m, NULL, NULL, IP_RAWOUTPUT, &sc->sc_imo,
|
|
NULL) == 0)
|
|
V_pfsyncstats.pfsyncs_opackets++;
|
|
else
|
|
V_pfsyncstats.pfsyncs_oerrors++;
|
|
}
|
|
CURVNET_RESTORE();
|
|
}
|
|
|
|
static int
|
|
pfsync_multicast_setup(struct pfsync_softc *sc, struct ifnet *ifp, void *mship)
|
|
{
|
|
struct ip_moptions *imo = &sc->sc_imo;
|
|
int error;
|
|
|
|
if (!(ifp->if_flags & IFF_MULTICAST))
|
|
return (EADDRNOTAVAIL);
|
|
|
|
imo->imo_membership = (struct in_multi **)mship;
|
|
imo->imo_max_memberships = IP_MIN_MEMBERSHIPS;
|
|
imo->imo_multicast_vif = -1;
|
|
|
|
if ((error = in_joingroup(ifp, &sc->sc_sync_peer, NULL,
|
|
&imo->imo_membership[0])) != 0) {
|
|
imo->imo_membership = NULL;
|
|
return (error);
|
|
}
|
|
imo->imo_num_memberships++;
|
|
imo->imo_multicast_ifp = ifp;
|
|
imo->imo_multicast_ttl = PFSYNC_DFLTTL;
|
|
imo->imo_multicast_loop = 0;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
pfsync_multicast_cleanup(struct pfsync_softc *sc)
|
|
{
|
|
struct ip_moptions *imo = &sc->sc_imo;
|
|
|
|
in_leavegroup(imo->imo_membership[0], NULL);
|
|
free(imo->imo_membership, M_PFSYNC);
|
|
imo->imo_membership = NULL;
|
|
imo->imo_multicast_ifp = NULL;
|
|
}
|
|
|
|
#ifdef INET
|
|
extern struct domain inetdomain;
|
|
static struct protosw in_pfsync_protosw = {
|
|
.pr_type = SOCK_RAW,
|
|
.pr_domain = &inetdomain,
|
|
.pr_protocol = IPPROTO_PFSYNC,
|
|
.pr_flags = PR_ATOMIC|PR_ADDR,
|
|
.pr_input = pfsync_input,
|
|
.pr_output = (pr_output_t *)rip_output,
|
|
.pr_ctloutput = rip_ctloutput,
|
|
.pr_usrreqs = &rip_usrreqs
|
|
};
|
|
#endif
|
|
|
|
static int
|
|
pfsync_init()
|
|
{
|
|
VNET_ITERATOR_DECL(vnet_iter);
|
|
int error = 0;
|
|
|
|
VNET_LIST_RLOCK();
|
|
VNET_FOREACH(vnet_iter) {
|
|
CURVNET_SET(vnet_iter);
|
|
V_pfsync_cloner = pfsync_cloner;
|
|
V_pfsync_cloner_data = pfsync_cloner_data;
|
|
V_pfsync_cloner.ifc_data = &V_pfsync_cloner_data;
|
|
if_clone_attach(&V_pfsync_cloner);
|
|
error = swi_add(NULL, "pfsync", pfsyncintr, V_pfsyncif,
|
|
SWI_NET, INTR_MPSAFE, &V_pfsync_swi_cookie);
|
|
CURVNET_RESTORE();
|
|
if (error)
|
|
goto fail_locked;
|
|
}
|
|
VNET_LIST_RUNLOCK();
|
|
#ifdef INET
|
|
error = pf_proto_register(PF_INET, &in_pfsync_protosw);
|
|
if (error)
|
|
goto fail;
|
|
error = ipproto_register(IPPROTO_PFSYNC);
|
|
if (error) {
|
|
pf_proto_unregister(PF_INET, IPPROTO_PFSYNC, SOCK_RAW);
|
|
goto fail;
|
|
}
|
|
#endif
|
|
PF_RULES_WLOCK();
|
|
pfsync_state_import_ptr = pfsync_state_import;
|
|
pfsync_insert_state_ptr = pfsync_insert_state;
|
|
pfsync_update_state_ptr = pfsync_update_state;
|
|
pfsync_delete_state_ptr = pfsync_delete_state;
|
|
pfsync_clear_states_ptr = pfsync_clear_states;
|
|
pfsync_defer_ptr = pfsync_defer;
|
|
PF_RULES_WUNLOCK();
|
|
|
|
return (0);
|
|
|
|
fail:
|
|
VNET_LIST_RLOCK();
|
|
fail_locked:
|
|
VNET_FOREACH(vnet_iter) {
|
|
CURVNET_SET(vnet_iter);
|
|
if (V_pfsync_swi_cookie) {
|
|
swi_remove(V_pfsync_swi_cookie);
|
|
if_clone_detach(&V_pfsync_cloner);
|
|
}
|
|
CURVNET_RESTORE();
|
|
}
|
|
VNET_LIST_RUNLOCK();
|
|
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
pfsync_uninit()
|
|
{
|
|
VNET_ITERATOR_DECL(vnet_iter);
|
|
|
|
PF_RULES_WLOCK();
|
|
pfsync_state_import_ptr = NULL;
|
|
pfsync_insert_state_ptr = NULL;
|
|
pfsync_update_state_ptr = NULL;
|
|
pfsync_delete_state_ptr = NULL;
|
|
pfsync_clear_states_ptr = NULL;
|
|
pfsync_defer_ptr = NULL;
|
|
PF_RULES_WUNLOCK();
|
|
|
|
ipproto_unregister(IPPROTO_PFSYNC);
|
|
pf_proto_unregister(PF_INET, IPPROTO_PFSYNC, SOCK_RAW);
|
|
VNET_LIST_RLOCK();
|
|
VNET_FOREACH(vnet_iter) {
|
|
CURVNET_SET(vnet_iter);
|
|
if_clone_detach(&V_pfsync_cloner);
|
|
swi_remove(V_pfsync_swi_cookie);
|
|
CURVNET_RESTORE();
|
|
}
|
|
VNET_LIST_RUNLOCK();
|
|
}
|
|
|
|
static int
|
|
pfsync_modevent(module_t mod, int type, void *data)
|
|
{
|
|
int error = 0;
|
|
|
|
switch (type) {
|
|
case MOD_LOAD:
|
|
error = pfsync_init();
|
|
break;
|
|
case MOD_QUIESCE:
|
|
/*
|
|
* Module should not be unloaded due to race conditions.
|
|
*/
|
|
error = EPERM;
|
|
break;
|
|
case MOD_UNLOAD:
|
|
pfsync_uninit();
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
static moduledata_t pfsync_mod = {
|
|
"pfsync",
|
|
pfsync_modevent,
|
|
0
|
|
};
|
|
|
|
#define PFSYNC_MODVER 1
|
|
|
|
DECLARE_MODULE(pfsync, pfsync_mod, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY);
|
|
MODULE_VERSION(pfsync, PFSYNC_MODVER);
|
|
MODULE_DEPEND(pfsync, pf, PF_MODVER, PF_MODVER, PF_MODVER);
|