D43114.id132462.diff
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	diff --git a/sbin/pfctl/parse.y b/sbin/pfctl/parse.y
	--- a/sbin/pfctl/parse.y
	+++ b/sbin/pfctl/parse.y
	@@ -4680,6 +4680,7 @@
	redirpool pool_opts
	{
	struct pfctl_rule r;
	+ struct node_state_opt *o;

	if (check_rulestate(PFCTL_STATE_NAT))
	YYERROR;
	@@ -4855,6 +4856,21 @@
	r.rpool.mape = $10.mape;
	}

	+ o = keep_state_defaults;
	+ while (o) {
	+ switch (o->type) {
	+ case PF_STATE_OPT_PFLOW:
	+ if (r.rule_flag & PFRULE_PFLOW) {
	+ yyerror("state pflow option: "
	+ "multiple definitions");
	+ YYERROR;
	+ }
	+ r.rule_flag \|= PFRULE_PFLOW;
	+ break;
	+ }
	+ o = o->next;
	+ }
	+
	expand_rule(&r, $2, $9 == NULL ? NULL : $9->host, $4,
	$5.src_os, $5.src.host, $5.src.port, $5.dst.host,
	$5.dst.port, 0, 0, 0, "");
	diff --git a/sys/net/pflow.h b/sys/net/pflow.h
	--- a/sys/net/pflow.h
	+++ b/sys/net/pflow.h
	@@ -68,6 +68,14 @@
	#define PFIX_IE_destinationIPv6Address 28
	#define PFIX_IE_flowStartMilliseconds 152
	#define PFIX_IE_flowEndMilliseconds 153
	+#define PFIX_IE_postNATSourceIPv4Address 225
	+#define PFIX_IE_postNATDestinationIPv4Address 226
	+#define PFIX_IE_postNAPTSourceTransportPort 227
	+#define PFIX_IE_postNAPTDestinationTransportPort 228
	+#define PFIX_IE_natEvent 230
	+#define PFIX_NAT_EVENT_SESSION_CREATE 4
	+#define PFIX_NAT_EVENT_SESSION_DELETE 5
	+#define PFIX_IE_timeStamp 323

	struct pflow_flow {
	u_int32_t src_ip;
	@@ -148,10 +156,28 @@
	#define PFLOW_IPFIX_TMPL_IPV6_ID 257
	} __packed;

	+struct pflow_ipfix_tmpl_nat44 {
	+ struct pflow_tmpl_hdr h;
	+ struct pflow_tmpl_fspec timestamp;
	+ struct pflow_tmpl_fspec nat_event;
	+ struct pflow_tmpl_fspec protocol;
	+ struct pflow_tmpl_fspec src_ip;
	+ struct pflow_tmpl_fspec src_port;
	+ struct pflow_tmpl_fspec postnat_src_ip;
	+ struct pflow_tmpl_fspec postnat_src_port;
	+ struct pflow_tmpl_fspec dst_ip;
	+ struct pflow_tmpl_fspec dst_port;
	+ struct pflow_tmpl_fspec postnat_dst_ip;
	+ struct pflow_tmpl_fspec postnat_dst_port;
	+#define PFLOW_IPFIX_TMPL_NAT44_FIELD_COUNT 11
	+#define PFLOW_IPFIX_TMPL_NAT44_ID 258
	+};
	+
	struct pflow_ipfix_tmpl {
	struct pflow_set_header set_header;
	struct pflow_ipfix_tmpl_ipv4 ipv4_tmpl;
	struct pflow_ipfix_tmpl_ipv6 ipv6_tmpl;
	+ struct pflow_ipfix_tmpl_nat44 nat44_tmpl;
	} __packed;

	struct pflow_ipfix_flow4 {
	@@ -186,6 +212,20 @@
	/* XXX padding needed? */
	} __packed;

	+struct pflow_ipfix_nat4 {
	+ u_int64_t timestamp; /* timeStamp */
	+ u_int8_t nat_event; /* natEvent */
	+ u_int8_t protocol; /* protocolIdentifier */
	+ u_int32_t src_ip; /* sourceIPv4Address */
	+ u_int16_t src_port; /* sourceTransportPort */
	+ u_int32_t postnat_src_ip; /* postNATSourceIPv4Address */
	+ u_int16_t postnat_src_port;/* postNAPTSourceTransportPort */
	+ u_int32_t dest_ip; /* destinationIPv4Address */
	+ u_int16_t dest_port; /* destinationTransportPort */
	+ u_int32_t postnat_dest_ip;/* postNATDestinationIPv4Address */
	+ u_int16_t postnat_dest_port;/* postNAPTDestinationTransportPort */
	+} __packed;
	+
	#ifdef _KERNEL

	struct pflow_softc {
	@@ -199,13 +239,16 @@
	unsigned int sc_count;
	unsigned int sc_count4;
	unsigned int sc_count6;
	+ unsigned int sc_count_nat4;
	unsigned int sc_maxcount;
	unsigned int sc_maxcount4;
	unsigned int sc_maxcount6;
	+ unsigned int sc_maxcount_nat4;
	u_int64_t sc_gcounter;
	u_int32_t sc_sequence;
	struct callout sc_tmo;
	struct callout sc_tmo6;
	+ struct callout sc_tmo_nat4;
	struct callout sc_tmo_tmpl;
	struct intr_event *sc_swi_ie;
	void *sc_swi_cookie;
	@@ -219,6 +262,7 @@
	u_int32_t sc_observation_dom;
	struct mbuf sc_mbuf; / current cumulative mbuf */
	struct mbuf sc_mbuf6; / current cumulative mbuf */
	+ struct mbuf *sc_mbuf_nat4;
	CK_LIST_ENTRY(pflow_softc) sc_next;
	struct epoch_context sc_epoch_ctx;
	};
	diff --git a/sys/netpfil/pf/pf.c b/sys/netpfil/pf/pf.c
	--- a/sys/netpfil/pf/pf.c
	+++ b/sys/netpfil/pf/pf.c
	@@ -4875,7 +4875,8 @@
	s->state_flags \|= PFSTATE_SLOPPY;
	if (pd->flags & PFDESC_TCP_NORM) /* Set by old-style scrub rules */
	s->state_flags \|= PFSTATE_SCRUB_TCP;
	- if (r->rule_flag & PFRULE_PFLOW)
	+ if ((r->rule_flag & PFRULE_PFLOW) \|\|
	+ (nr != NULL && nr->rule_flag & PFRULE_PFLOW))
	s->state_flags \|= PFSTATE_PFLOW;

	s->act.log = pd->act.log & PF_LOG_ALL;
	diff --git a/sys/netpfil/pf/pflow.c b/sys/netpfil/pf/pflow.c
	--- a/sys/netpfil/pf/pflow.c
	+++ b/sys/netpfil/pf/pflow.c
	@@ -70,6 +70,12 @@
	#define DPRINTF(x)
	#endif

	+enum pflow_family_t {
	+ PFLOW_INET,
	+ PFLOW_INET6,
	+ PFLOW_NAT4,
	+};
	+
	static void pflow_output_process(void *);
	static int pflow_create(int);
	static int pflow_destroy(int, bool);
	@@ -80,12 +86,13 @@
	static struct mbuf pflow_get_mbuf(struct pflow_softc , u_int16_t);
	static void pflow_flush(struct pflow_softc *);
	static int pflow_sendout_v5(struct pflow_softc *);
	-static int pflow_sendout_ipfix(struct pflow_softc *, sa_family_t);
	+static int pflow_sendout_ipfix(struct pflow_softc *, enum pflow_family_t);
	static int pflow_sendout_ipfix_tmpl(struct pflow_softc *);
	static int pflow_sendout_mbuf(struct pflow_softc , struct mbuf );
	static void pflow_timeout(void *);
	static void pflow_timeout6(void *);
	static void pflow_timeout_tmpl(void *);
	+static void pflow_timeout_nat4(void *);
	static void copy_flow_data(struct pflow_flow , struct pflow_flow ,
	const struct pf_kstate , struct pf_state_key , int, int);
	static void copy_flow_ipfix_4_data(struct pflow_ipfix_flow4 *,
	@@ -106,6 +113,9 @@
	struct pflow_softc *sc);
	static int copy_flow_ipfix_6_to_m(struct pflow_ipfix_flow6 *flow,
	struct pflow_softc *sc);
	+static int copy_nat_ipfix_4_to_m(struct pflow_ipfix_nat4 *,
	+ const struct pf_kstate , struct pflow_softc ,
	+ uint8_t, uint64_t);

	static const char pflowname[] = "pflow";

	@@ -303,6 +313,53 @@
	htons(PFIX_IE_protocolIdentifier);
	pflowif->sc_tmpl_ipfix.ipv6_tmpl.protocol.len = htons(1);

	+ /* NAT44 create template */
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.h.tmpl_id =
	+ htons(PFLOW_IPFIX_TMPL_NAT44_ID);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.h.field_count =
	+ htons(PFLOW_IPFIX_TMPL_NAT44_FIELD_COUNT);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.timestamp.field_id =
	+ htons(PFIX_IE_timeStamp);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.timestamp.len =
	+ htons(8);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.nat_event.field_id =
	+ htons(PFIX_IE_natEvent);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.nat_event.len =
	+ htons(1);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.protocol.field_id =
	+ htons(PFIX_IE_protocolIdentifier);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.protocol.len = htons(1);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.src_ip.field_id =
	+ htons(PFIX_IE_sourceIPv4Address);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.src_ip.len =
	+ htons(4);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.src_port.field_id =
	+ htons(PFIX_IE_sourceTransportPort);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.src_port.len = htons(2);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.postnat_src_ip.field_id =
	+ htons(PFIX_IE_postNATSourceIPv4Address);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.postnat_src_ip.len =
	+ htons(4);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.postnat_src_port.field_id =
	+ htons(PFIX_IE_postNAPTSourceTransportPort);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.postnat_src_port.len =
	+ htons(2);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.dst_ip.field_id =
	+ htons(PFIX_IE_destinationIPv4Address);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.dst_ip.len =
	+ htons(4);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.dst_port.field_id =
	+ htons(PFIX_IE_destinationTransportPort);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.dst_port.len = htons(2);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.postnat_dst_ip.field_id =
	+ htons(PFIX_IE_postNATDestinationIPv4Address);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.postnat_dst_ip.len =
	+ htons(4);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.postnat_dst_port.field_id =
	+ htons(PFIX_IE_postNAPTDestinationTransportPort);
	+ pflowif->sc_tmpl_ipfix.nat44_tmpl.postnat_dst_port.len =
	+ htons(2);
	+
	pflowif->sc_id = unit;
	pflowif->sc_vnet = curvnet;

	@@ -311,6 +368,7 @@

	callout_init_mtx(&pflowif->sc_tmo, &pflowif->sc_lock, 0);
	callout_init_mtx(&pflowif->sc_tmo6, &pflowif->sc_lock, 0);
	+ callout_init_mtx(&pflowif->sc_tmo_nat4, &pflowif->sc_lock, 0);
	callout_init_mtx(&pflowif->sc_tmo_tmpl, &pflowif->sc_lock, 0);

	error = swi_add(&pflowif->sc_swi_ie, pflowname, pflow_output_process,
	@@ -374,10 +432,12 @@

	callout_drain(&sc->sc_tmo);
	callout_drain(&sc->sc_tmo6);
	+ callout_drain(&sc->sc_tmo_nat4);
	callout_drain(&sc->sc_tmo_tmpl);

	m_freem(sc->sc_mbuf);
	m_freem(sc->sc_mbuf6);
	+ m_freem(sc->sc_mbuf_nat4);

	PFLOW_LOCK(sc);
	mbufq_drain(&sc->sc_outputqueue);
	@@ -425,18 +485,26 @@
	int
	pflow_calc_mtu(struct pflow_softc *sc, int mtu, int hdrsz)
	{
	+ size_t min;

	sc->sc_maxcount4 = (mtu - hdrsz -
	sizeof(struct udpiphdr)) / sizeof(struct pflow_ipfix_flow4);
	sc->sc_maxcount6 = (mtu - hdrsz -
	sizeof(struct udpiphdr)) / sizeof(struct pflow_ipfix_flow6);
	+ sc->sc_maxcount_nat4 = (mtu - hdrsz -
	+ sizeof(struct udpiphdr)) / sizeof(struct pflow_ipfix_nat4);
	if (sc->sc_maxcount4 > PFLOW_MAXFLOWS)
	sc->sc_maxcount4 = PFLOW_MAXFLOWS;
	if (sc->sc_maxcount6 > PFLOW_MAXFLOWS)
	sc->sc_maxcount6 = PFLOW_MAXFLOWS;
	- return (hdrsz + sizeof(struct udpiphdr) +
	- MIN(sc->sc_maxcount4 * sizeof(struct pflow_ipfix_flow4),
	- sc->sc_maxcount6 * sizeof(struct pflow_ipfix_flow6)));
	+ if (sc->sc_maxcount_nat4 > PFLOW_MAXFLOWS)
	+ sc->sc_maxcount_nat4 = PFLOW_MAXFLOWS;
	+
	+ min = MIN(sc->sc_maxcount4 * sizeof(struct pflow_ipfix_flow4),
	+ sc->sc_maxcount6 * sizeof(struct pflow_ipfix_flow6));
	+ min = MIN(min, sc->sc_maxcount_nat4 * sizeof(struct pflow_ipfix_nat4));
	+
	+ return (hdrsz + sizeof(struct udpiphdr) + min);
	}

	static void
	@@ -628,6 +696,28 @@
	flow1->tos = flow2->tos = st->rule.ptr->tos;
	}

	+static void
	+copy_nat_ipfix_4_data(struct pflow_ipfix_nat4 *nat1,
	+ struct pflow_ipfix_nat4 nat2, const struct pf_kstate st,
	+ struct pf_state_key sk, struct pflow_softc sc, int src, int dst)
	+{
	+ nat1->src_ip = nat2->dest_ip = st->key[PF_SK_STACK]->addr[src].v4.s_addr;
	+ nat1->src_port = nat2->dest_port = st->key[PF_SK_STACK]->port[src];
	+ nat1->dest_ip = nat2->src_ip = st->key[PF_SK_STACK]->addr[dst].v4.s_addr;
	+ nat1->dest_port = nat2->src_port = st->key[PF_SK_STACK]->port[dst];
	+ nat1->postnat_src_ip = nat2->postnat_dest_ip = st->key[PF_SK_WIRE]->addr[src].v4.s_addr;
	+ nat1->postnat_src_port = nat2->postnat_dest_port = st->key[PF_SK_WIRE]->port[src];
	+ nat1->postnat_dest_ip = nat2->postnat_src_ip = st->key[PF_SK_WIRE]->addr[dst].v4.s_addr;
	+ nat1->postnat_dest_port = nat2->postnat_src_port = st->key[PF_SK_WIRE]->port[dst];
	+ nat1->protocol = nat2->protocol = sk->proto;
	+
	+ /*
	+ * Because we have to generate a create and delete event we'll fill out the
	+ * timestamp and nat_event fields when we transmit. As opposed to doing this
	+ * work a second time.
	+ */
	+}
	+
	static void
	export_pflow(const struct pf_kstate *st)
	{
	@@ -755,7 +845,7 @@
	sc->sc_count4++;

	if (sc->sc_count4 >= sc->sc_maxcount4)
	- ret = pflow_sendout_ipfix(sc, AF_INET);
	+ ret = pflow_sendout_ipfix(sc, PFLOW_INET);
	return(ret);
	}

	@@ -785,11 +875,46 @@
	sc->sc_count6++;

	if (sc->sc_count6 >= sc->sc_maxcount6)
	- ret = pflow_sendout_ipfix(sc, AF_INET6);
	+ ret = pflow_sendout_ipfix(sc, PFLOW_INET6);

	return(ret);
	}

	+int
	+copy_nat_ipfix_4_to_m(struct pflow_ipfix_nat4 nat, const struct pf_kstate st,
	+ struct pflow_softc *sc, uint8_t event, uint64_t timestamp)
	+{
	+ int ret = 0;
	+
	+ PFLOW_ASSERT(sc);
	+
	+ if (sc->sc_mbuf_nat4 == NULL) {
	+ if ((sc->sc_mbuf_nat4 =
	+ pflow_get_mbuf(sc, PFLOW_IPFIX_TMPL_NAT44_ID)) == NULL) {
	+ return (ENOBUFS);
	+ }
	+ sc->sc_count_nat4 = 0;
	+ callout_reset(&sc->sc_tmo, PFLOW_TIMEOUT * hz,
	+ pflow_timeout_nat4, sc);
	+ }
	+
	+ nat->nat_event = event;
	+ nat->timestamp = htobe64(pf_get_time() - (pf_get_uptime() - timestamp));
	+ m_copyback(sc->sc_mbuf_nat4, PFLOW_SET_HDRLEN +
	+ (sc->sc_count_nat4 * sizeof(struct pflow_ipfix_nat4)),
	+ sizeof(struct pflow_ipfix_nat4), (caddr_t)nat);
	+ sc->sc_count_nat4++;
	+
	+ if (V_pflowstats.pflow_flows == sc->sc_gcounter)
	+ V_pflowstats.pflow_flows++;
	+
	+ sc->sc_gcounter++;
	+ if (sc->sc_count_nat4 >= sc->sc_maxcount_nat4)
	+ ret = pflow_sendout_ipfix(sc, PFLOW_NAT4);
	+
	+ return (ret);
	+}
	+
	static int
	pflow_pack_flow(const struct pf_kstate st, struct pf_state_key sk,
	struct pflow_softc *sc)
	@@ -815,17 +940,30 @@
	return (ret);
	}

	+static bool
	+pflow_is_natd(const struct pf_kstate *st)
	+{
	+ /* If ports or addresses are different we've been NAT-ed. */
	+ return (memcmp(st->key[PF_SK_WIRE], st->key[PF_SK_STACK],
	+ sizeof(struct pf_addr) * 2 + sizeof(uint16_t) * 2) != 0);
	+}
	+
	static int
	pflow_pack_flow_ipfix(const struct pf_kstate st, struct pf_state_key sk,
	struct pflow_softc *sc)
	{
	struct pflow_ipfix_flow4 flow4_1, flow4_2;
	+ struct pflow_ipfix_nat4 nat4_1, nat4_2;
	struct pflow_ipfix_flow6 flow6_1, flow6_2;
	int ret = 0;
	+ bool nat = false;
	+
	if (sk->af == AF_INET) {
	bzero(&flow4_1, sizeof(flow4_1));
	bzero(&flow4_2, sizeof(flow4_2));

	+ nat = pflow_is_natd(st);
	+
	if (st->direction == PF_OUT)
	copy_flow_ipfix_4_data(&flow4_1, &flow4_2, st, sk, sc,
	1, 0);
	@@ -833,11 +971,30 @@
	copy_flow_ipfix_4_data(&flow4_1, &flow4_2, st, sk, sc,
	0, 1);

	- if (st->bytes[0] != 0) /* first flow from state */
	+ if (nat)
	+ copy_nat_ipfix_4_data(&nat4_1, &nat4_2, st, sk, sc, 1, 0);
	+
	+ if (st->bytes[0] != 0) /* first flow from state */ {
	ret = copy_flow_ipfix_4_to_m(&flow4_1, sc);

	- if (st->bytes[1] != 0) /* second flow from state */
	+ if (ret == 0 && nat) {
	+ ret = copy_nat_ipfix_4_to_m(&nat4_1, st, sc,
	+ PFIX_NAT_EVENT_SESSION_CREATE, st->creation);
	+ ret \|= copy_nat_ipfix_4_to_m(&nat4_1, st, sc,
	+ PFIX_NAT_EVENT_SESSION_DELETE, st->expire);
	+ }
	+ }
	+
	+ if (st->bytes[1] != 0) /* second flow from state */ {
	ret = copy_flow_ipfix_4_to_m(&flow4_2, sc);
	+
	+ if (ret == 0 && nat) {
	+ ret = copy_nat_ipfix_4_to_m(&nat4_2, st, sc,
	+ PFIX_NAT_EVENT_SESSION_CREATE, st->creation);
	+ ret \|= copy_nat_ipfix_4_to_m(&nat4_2, st, sc,
	+ PFIX_NAT_EVENT_SESSION_DELETE, st->expire);
	+ }
	+ }
	} else if (sk->af == AF_INET6) {
	bzero(&flow6_1, sizeof(flow6_1));
	bzero(&flow6_2, sizeof(flow6_2));
	@@ -871,7 +1028,7 @@
	pflow_sendout_v5(sc);
	break;
	case PFLOW_PROTO_10:
	- pflow_sendout_ipfix(sc, AF_INET);
	+ pflow_sendout_ipfix(sc, PFLOW_INET);
	break;
	default: /* NOTREACHED */
	panic("Unsupported version %d", sc->sc_version);
	@@ -892,7 +1049,7 @@
	return;

	CURVNET_SET(sc->sc_vnet);
	- pflow_sendout_ipfix(sc, AF_INET6);
	+ pflow_sendout_ipfix(sc, PFLOW_INET6);
	CURVNET_RESTORE();
	}

	@@ -911,6 +1068,21 @@
	CURVNET_RESTORE();
	}

	+static void
	+pflow_timeout_nat4(void *v)
	+{
	+ struct pflow_softc *sc = v;
	+
	+ PFLOW_ASSERT(sc);
	+
	+ if (sc->sc_version != PFLOW_PROTO_10)
	+ return;
	+
	+ CURVNET_SET(sc->sc_vnet);
	+ pflow_sendout_ipfix(sc, PFLOW_NAT4);
	+ CURVNET_RESTORE();
	+}
	+
	static void
	pflow_flush(struct pflow_softc *sc)
	{
	@@ -921,8 +1093,9 @@
	pflow_sendout_v5(sc);
	break;
	case PFLOW_PROTO_10:
	- pflow_sendout_ipfix(sc, AF_INET);
	- pflow_sendout_ipfix(sc, AF_INET6);
	+ pflow_sendout_ipfix(sc, PFLOW_INET);
	+ pflow_sendout_ipfix(sc, PFLOW_INET6);
	+ pflow_sendout_ipfix(sc, PFLOW_NAT4);
	break;
	default: /* NOTREACHED */
	break;
	@@ -960,7 +1133,7 @@
	}

	static int
	-pflow_sendout_ipfix(struct pflow_softc *sc, sa_family_t af)
	+pflow_sendout_ipfix(struct pflow_softc *sc, enum pflow_family_t af)
	{
	struct mbuf *m;
	struct pflow_v10_header *h10;
	@@ -971,7 +1144,7 @@
	PFLOW_ASSERT(sc);

	switch (af) {
	- case AF_INET:
	+ case PFLOW_INET:
	m = sc->sc_mbuf;
	callout_stop(&sc->sc_tmo);
	if (m == NULL)
	@@ -981,7 +1154,7 @@
	set_length = sizeof(struct pflow_set_header)
	+ sc->sc_count4 * sizeof(struct pflow_ipfix_flow4);
	break;
	- case AF_INET6:
	+ case PFLOW_INET6:
	m = sc->sc_mbuf6;
	callout_stop(&sc->sc_tmo6);
	if (m == NULL)
	@@ -991,6 +1164,16 @@
	set_length = sizeof(struct pflow_set_header)
	+ sc->sc_count6 * sizeof(struct pflow_ipfix_flow6);
	break;
	+ case PFLOW_NAT4:
	+ m = sc->sc_mbuf_nat4;
	+ callout_stop(&sc->sc_tmo_nat4);
	+ if (m == NULL)
	+ return (0);
	+ sc->sc_mbuf_nat4 = NULL;
	+ count = sc->sc_count_nat4;
	+ set_length = sizeof(struct pflow_set_header)
	+ + sc->sc_count_nat4 * sizeof(struct pflow_ipfix_nat4);
	+ break;
	default:
	panic("Unsupported AF %d", af);
	}

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