diff options
Diffstat (limited to 'sys/contrib/pf/net/if_pfsync.c')
| -rw-r--r-- | sys/contrib/pf/net/if_pfsync.c | 2397 |
1 files changed, 0 insertions, 2397 deletions
diff --git a/sys/contrib/pf/net/if_pfsync.c b/sys/contrib/pf/net/if_pfsync.c deleted file mode 100644 index 28af641..0000000 --- a/sys/contrib/pf/net/if_pfsync.c +++ /dev/null @@ -1,2397 +0,0 @@ -/* $OpenBSD: if_pfsync.c,v 1.110 2009/02/24 05:39:19 dlg Exp $ */ - -/* - * Copyright (c) 2002 Michael Shalayeff - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, - * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES - * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR - * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, - * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING - * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF - * THE POSSIBILITY OF SUCH DAMAGE. - */ - -/* - * Copyright (c) 2009 David Gwynne <dlg@openbsd.org> - * - * Permission to use, copy, modify, and distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - */ - -/* - * Revisions picked from OpenBSD after revision 1.110 import: - * 1.118, 1.124, 1.148, 1.149, 1.151, 1.171 - fixes to bulk updates - * 1.120, 1.175 - use monotonic time_uptime - * 1.122 - reduce number of updates for non-TCP sessions - * 1.128 - cleanups - * 1.146 - bzero() mbuf before sparsely filling it with data - * 1.170 - SIOCSIFMTU checks - * 1.126, 1.142 - deferred packets processing - * 1.173 - correct expire time processing - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include "opt_inet.h" -#include "opt_inet6.h" -#include "opt_pf.h" - -#include <sys/param.h> -#include <sys/bus.h> -#include <sys/endian.h> -#include <sys/interrupt.h> -#include <sys/kernel.h> -#include <sys/lock.h> -#include <sys/mbuf.h> -#include <sys/module.h> -#include <sys/mutex.h> -#include <sys/priv.h> -#include <sys/protosw.h> -#include <sys/socket.h> -#include <sys/sockio.h> -#include <sys/sysctl.h> - -#include <net/bpf.h> -#include <net/if.h> -#include <net/if_clone.h> -#include <net/if_types.h> -#include <net/pfvar.h> -#include <net/if_pfsync.h> - -#include <netinet/if_ether.h> -#include <netinet/in.h> -#include <netinet/in_var.h> -#include <netinet/ip.h> -#include <netinet/ip_carp.h> -#include <netinet/ip_var.h> -#include <netinet/tcp.h> -#include <netinet/tcp_fsm.h> -#include <netinet/tcp_seq.h> - -#define PFSYNC_MINPKT ( \ - sizeof(struct ip) + \ - sizeof(struct pfsync_header) + \ - sizeof(struct pfsync_subheader) + \ - sizeof(struct pfsync_eof)) - -struct pfsync_pkt { - struct ip *ip; - struct in_addr src; - u_int8_t flags; -}; - -static int pfsync_upd_tcp(struct pf_state *, struct pfsync_state_peer *, - struct pfsync_state_peer *); -static int pfsync_in_clr(struct pfsync_pkt *, struct mbuf *, int, int); -static int pfsync_in_ins(struct pfsync_pkt *, struct mbuf *, int, int); -static int pfsync_in_iack(struct pfsync_pkt *, struct mbuf *, int, int); -static int pfsync_in_upd(struct pfsync_pkt *, struct mbuf *, int, int); -static int pfsync_in_upd_c(struct pfsync_pkt *, struct mbuf *, int, int); -static int pfsync_in_ureq(struct pfsync_pkt *, struct mbuf *, int, int); -static int pfsync_in_del(struct pfsync_pkt *, struct mbuf *, int, int); -static int pfsync_in_del_c(struct pfsync_pkt *, struct mbuf *, int, int); -static int pfsync_in_bus(struct pfsync_pkt *, struct mbuf *, int, int); -static int pfsync_in_tdb(struct pfsync_pkt *, struct mbuf *, int, int); -static int pfsync_in_eof(struct pfsync_pkt *, struct mbuf *, int, int); -static int pfsync_in_error(struct pfsync_pkt *, struct mbuf *, int, int); - -static int (*pfsync_acts[])(struct pfsync_pkt *, struct mbuf *, int, int) = { - pfsync_in_clr, /* PFSYNC_ACT_CLR */ - pfsync_in_ins, /* PFSYNC_ACT_INS */ - pfsync_in_iack, /* PFSYNC_ACT_INS_ACK */ - pfsync_in_upd, /* PFSYNC_ACT_UPD */ - pfsync_in_upd_c, /* PFSYNC_ACT_UPD_C */ - pfsync_in_ureq, /* PFSYNC_ACT_UPD_REQ */ - pfsync_in_del, /* PFSYNC_ACT_DEL */ - pfsync_in_del_c, /* PFSYNC_ACT_DEL_C */ - pfsync_in_error, /* PFSYNC_ACT_INS_F */ - pfsync_in_error, /* PFSYNC_ACT_DEL_F */ - pfsync_in_bus, /* PFSYNC_ACT_BUS */ - pfsync_in_tdb, /* PFSYNC_ACT_TDB */ - pfsync_in_eof /* PFSYNC_ACT_EOF */ -}; - -struct pfsync_q { - int (*write)(struct pf_state *, struct mbuf *, int); - size_t len; - u_int8_t action; -}; - -/* we have one of these for every PFSYNC_S_ */ -static int pfsync_out_state(struct pf_state *, struct mbuf *, int); -static int pfsync_out_iack(struct pf_state *, struct mbuf *, int); -static int pfsync_out_upd_c(struct pf_state *, struct mbuf *, int); -static int pfsync_out_del(struct pf_state *, struct mbuf *, int); - -static struct pfsync_q pfsync_qs[] = { - { pfsync_out_state, sizeof(struct pfsync_state), PFSYNC_ACT_INS }, - { pfsync_out_iack, sizeof(struct pfsync_ins_ack), PFSYNC_ACT_INS_ACK }, - { pfsync_out_state, sizeof(struct pfsync_state), PFSYNC_ACT_UPD }, - { pfsync_out_upd_c, sizeof(struct pfsync_upd_c), PFSYNC_ACT_UPD_C }, - { pfsync_out_del, sizeof(struct pfsync_del_c), PFSYNC_ACT_DEL_C } -}; - -static void pfsync_q_ins(struct pf_state *, int); -static void pfsync_q_del(struct pf_state *); - -static void pfsync_update_state(struct pf_state *); - -struct pfsync_upd_req_item { - TAILQ_ENTRY(pfsync_upd_req_item) ur_entry; - struct pfsync_upd_req ur_msg; -}; - -struct pfsync_deferral { - struct pfsync_softc *pd_sc; - TAILQ_ENTRY(pfsync_deferral) pd_entry; - u_int pd_refs; - struct callout pd_tmo; - - struct pf_state *pd_st; - struct mbuf *pd_m; -}; - -struct pfsync_softc { - /* Configuration */ - struct ifnet *sc_ifp; - struct ifnet *sc_sync_if; - struct ip_moptions sc_imo; - struct in_addr sc_sync_peer; - uint32_t sc_flags; -#define PFSYNCF_OK 0x00000001 -#define PFSYNCF_DEFER 0x00000002 -#define PFSYNCF_PUSH 0x00000004 - uint8_t sc_maxupdates; - struct ip sc_template; - struct callout sc_tmo; - struct mtx sc_mtx; - - /* Queued data */ - size_t sc_len; - TAILQ_HEAD(, pf_state) sc_qs[PFSYNC_S_COUNT]; - TAILQ_HEAD(, pfsync_upd_req_item) sc_upd_req_list; - TAILQ_HEAD(, pfsync_deferral) sc_deferrals; - u_int sc_deferred; - void *sc_plus; - size_t sc_pluslen; - - /* Bulk update info */ - struct mtx sc_bulk_mtx; - uint32_t sc_ureq_sent; - int sc_bulk_tries; - uint32_t sc_ureq_received; - int sc_bulk_hashid; - uint64_t sc_bulk_stateid; - uint32_t sc_bulk_creatorid; - struct callout sc_bulk_tmo; - struct callout sc_bulkfail_tmo; -}; - -#define PFSYNC_LOCK(sc) mtx_lock(&(sc)->sc_mtx) -#define PFSYNC_UNLOCK(sc) mtx_unlock(&(sc)->sc_mtx) -#define PFSYNC_LOCK_ASSERT(sc) mtx_assert(&(sc)->sc_mtx, MA_OWNED) - -#define PFSYNC_BLOCK(sc) mtx_lock(&(sc)->sc_bulk_mtx) -#define PFSYNC_BUNLOCK(sc) mtx_unlock(&(sc)->sc_bulk_mtx) -#define PFSYNC_BLOCK_ASSERT(sc) mtx_assert(&(sc)->sc_bulk_mtx, MA_OWNED) - -static MALLOC_DEFINE(M_PFSYNC, "pfsync", "pfsync(4) data"); -static VNET_DEFINE(struct pfsync_softc *, pfsyncif) = NULL; -#define V_pfsyncif VNET(pfsyncif) -static VNET_DEFINE(void *, pfsync_swi_cookie) = NULL; -#define V_pfsync_swi_cookie VNET(pfsync_swi_cookie) -static VNET_DEFINE(struct pfsyncstats, pfsyncstats); -#define V_pfsyncstats VNET(pfsyncstats) -static VNET_DEFINE(int, pfsync_carp_adj) = CARP_MAXSKEW; -#define V_pfsync_carp_adj VNET(pfsync_carp_adj) - -static void pfsync_timeout(void *); -static void pfsync_push(struct pfsync_softc *); -static void pfsyncintr(void *); -static int pfsync_multicast_setup(struct pfsync_softc *, struct ifnet *, - void *); -static void pfsync_multicast_cleanup(struct pfsync_softc *); -static int pfsync_init(void); -static void pfsync_uninit(void); - -SYSCTL_NODE(_net, OID_AUTO, pfsync, CTLFLAG_RW, 0, "PFSYNC"); -SYSCTL_VNET_STRUCT(_net_pfsync, OID_AUTO, stats, CTLFLAG_RW, - &VNET_NAME(pfsyncstats), pfsyncstats, - "PFSYNC statistics (struct pfsyncstats, net/if_pfsync.h)"); -SYSCTL_INT(_net_pfsync, OID_AUTO, carp_demotion_factor, CTLFLAG_RW, - &VNET_NAME(pfsync_carp_adj), 0, "pfsync's CARP demotion factor adjustment"); - -static int pfsync_clone_create(struct if_clone *, int, caddr_t); -static void pfsync_clone_destroy(struct ifnet *); -static int pfsync_alloc_scrub_memory(struct pfsync_state_peer *, - struct pf_state_peer *); -static int pfsyncoutput(struct ifnet *, struct mbuf *, struct sockaddr *, - struct route *); -static int pfsyncioctl(struct ifnet *, u_long, caddr_t); - -static int pfsync_defer(struct pf_state *, struct mbuf *); -static void pfsync_undefer(struct pfsync_deferral *, int); -static void pfsync_undefer_state(struct pf_state *, int); -static void pfsync_defer_tmo(void *); - -static void pfsync_request_update(u_int32_t, u_int64_t); -static void pfsync_update_state_req(struct pf_state *); - -static void pfsync_drop(struct pfsync_softc *); -static void pfsync_sendout(int); -static void pfsync_send_plus(void *, size_t); - -static void pfsync_bulk_start(void); -static void pfsync_bulk_status(u_int8_t); -static void pfsync_bulk_update(void *); -static void pfsync_bulk_fail(void *); - -#ifdef IPSEC -static void pfsync_update_net_tdb(struct pfsync_tdb *); -#endif - -#define PFSYNC_MAX_BULKTRIES 12 - -VNET_DEFINE(struct ifc_simple_data, pfsync_cloner_data); -VNET_DEFINE(struct if_clone, pfsync_cloner); -#define V_pfsync_cloner_data VNET(pfsync_cloner_data) -#define V_pfsync_cloner VNET(pfsync_cloner) -IFC_SIMPLE_DECLARE(pfsync, 1); - -static int -pfsync_clone_create(struct if_clone *ifc, int unit, caddr_t param) -{ - struct pfsync_softc *sc; - struct ifnet *ifp; - int q; - - if (unit != 0) - return (EINVAL); - - sc = malloc(sizeof(struct pfsync_softc), M_PFSYNC, M_WAITOK | M_ZERO); - sc->sc_flags |= PFSYNCF_OK; - - for (q = 0; q < PFSYNC_S_COUNT; q++) - TAILQ_INIT(&sc->sc_qs[q]); - - TAILQ_INIT(&sc->sc_upd_req_list); - TAILQ_INIT(&sc->sc_deferrals); - - sc->sc_len = PFSYNC_MINPKT; - sc->sc_maxupdates = 128; - - ifp = sc->sc_ifp = if_alloc(IFT_PFSYNC); - if (ifp == NULL) { - free(sc, M_PFSYNC); - return (ENOSPC); - } - if_initname(ifp, ifc->ifc_name, unit); - ifp->if_softc = sc; - ifp->if_ioctl = pfsyncioctl; - ifp->if_output = pfsyncoutput; - ifp->if_type = IFT_PFSYNC; - ifp->if_snd.ifq_maxlen = ifqmaxlen; - ifp->if_hdrlen = sizeof(struct pfsync_header); - ifp->if_mtu = ETHERMTU; - mtx_init(&sc->sc_mtx, "pfsync", NULL, MTX_DEF); - mtx_init(&sc->sc_bulk_mtx, "pfsync bulk", NULL, MTX_DEF); - callout_init(&sc->sc_tmo, CALLOUT_MPSAFE); - callout_init_mtx(&sc->sc_bulk_tmo, &sc->sc_bulk_mtx, 0); - callout_init_mtx(&sc->sc_bulkfail_tmo, &sc->sc_bulk_mtx, 0); - - if_attach(ifp); - - bpfattach(ifp, DLT_PFSYNC, PFSYNC_HDRLEN); - - V_pfsyncif = sc; - - return (0); -} - -static void -pfsync_clone_destroy(struct ifnet *ifp) -{ - struct pfsync_softc *sc = ifp->if_softc; - - /* - * At this stage, everything should have already been - * cleared by pfsync_uninit(), and we have only to - * drain callouts. - */ - while (sc->sc_deferred > 0) { - struct pfsync_deferral *pd = TAILQ_FIRST(&sc->sc_deferrals); - - TAILQ_REMOVE(&sc->sc_deferrals, pd, pd_entry); - sc->sc_deferred--; - if (callout_stop(&pd->pd_tmo)) { - pf_release_state(pd->pd_st); - m_freem(pd->pd_m); - free(pd, M_PFSYNC); - } else { - pd->pd_refs++; - callout_drain(&pd->pd_tmo); - free(pd, M_PFSYNC); - } - } - - callout_drain(&sc->sc_tmo); - callout_drain(&sc->sc_bulkfail_tmo); - callout_drain(&sc->sc_bulk_tmo); - - if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) - (*carp_demote_adj_p)(-V_pfsync_carp_adj, "pfsync destroy"); - bpfdetach(ifp); - if_detach(ifp); - - pfsync_drop(sc); - - if_free(ifp); - if (sc->sc_imo.imo_membership) - pfsync_multicast_cleanup(sc); - mtx_destroy(&sc->sc_mtx); - mtx_destroy(&sc->sc_bulk_mtx); - free(sc, M_PFSYNC); - - V_pfsyncif = NULL; -} - -static int -pfsync_alloc_scrub_memory(struct pfsync_state_peer *s, - struct pf_state_peer *d) -{ - if (s->scrub.scrub_flag && d->scrub == NULL) { - d->scrub = uma_zalloc(V_pf_state_scrub_z, M_NOWAIT | M_ZERO); - if (d->scrub == NULL) - return (ENOMEM); - } - - return (0); -} - - -static int -pfsync_state_import(struct pfsync_state *sp, u_int8_t flags) -{ - struct pfsync_softc *sc = V_pfsyncif; - struct pf_state *st = NULL; - struct pf_state_key *skw = NULL, *sks = NULL; - struct pf_rule *r = NULL; - struct pfi_kif *kif; - int error; - - PF_RULES_RASSERT(); - - 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); |
