diff --git a/print-cnfp.c b/print-cnfp.c
index 86d7128..d80d7fd 100644
--- a/print-cnfp.c
+++ b/print-cnfp.c
@@ -30,13 +30,15 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-/* Cisco NetFlow protocol */
+/*
+ * Cisco NetFlow protocol
+ *
+ * See
+ *
+ *    http://www.cisco.com/c/en/us/td/docs/net_mgmt/netflow_collection_engine/3-6/user/guide/format.html#wp1005892
+ */
 
-#ifndef lint
-static const char rcsid[] _U_ =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-cnfp.c,v 1.17 2005-04-20 20:53:18 guy Exp $";
-#endif
-
+#define NETDISSECT_REWORKED
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
@@ -53,49 +55,120 @@
 #include "tcp.h"
 #include "ipproto.h"
 
-struct nfhdr {
-	u_int32_t	ver_cnt;	/* version [15], and # of records */
-	u_int32_t	msys_uptime;
-	u_int32_t	utc_sec;
-	u_int32_t	utc_nsec;
-	u_int32_t	sequence;	/* v5 flow sequence number */
-	u_int32_t	reserved;	/* v5 only */
+struct nfhdr_v1 {
+	uint16_t	version;	/* version number */
+	uint16_t	count;		/* # of records */
+	uint32_t	msys_uptime;
+	uint32_t	utc_sec;
+	uint32_t	utc_nsec;
 };
 
-struct nfrec {
+struct nfrec_v1 {
 	struct in_addr	src_ina;
 	struct in_addr	dst_ina;
 	struct in_addr	nhop_ina;
-	u_int32_t	ifaces;		/* src,dst ifaces */
-	u_int32_t	packets;
-	u_int32_t	octets;
-	u_int32_t	start_time;	/* sys_uptime value */
-	u_int32_t	last_time;	/* sys_uptime value */
-	u_int32_t	ports;		/* src,dst ports */
-	u_int32_t	proto_tos;	/* proto, tos, pad, flags(v5) */
-	u_int32_t	asses;		/* v1: flags; v5: src,dst AS */
-	u_int32_t	masks;		/* src,dst addr prefix; v6: encaps */
+	uint16_t	input;		/* SNMP index of input interface */
+	uint16_t	output;		/* SNMP index of output interface */
+	uint32_t	packets;	/* packets in the flow */
+	uint32_t	octets;		/* layer 3 octets in the packets of the flow */
+	uint32_t	start_time;	/* sys_uptime value at start of flow */
+	uint32_t	last_time;	/* sys_uptime value when last packet of flow was received */
+	uint16_t	srcport;	/* TCP/UDP source port or equivalent */
+	uint16_t	dstport;	/* TCP/UDP source port or equivalent */
+	uint16_t	pad1;		/* pad */
+	uint8_t		proto;		/* IP protocol type */
+	uint8_t		tos;		/* IP type of service */
+	uint8_t		tcp_flags;	/* cumulative OR of TCP flags */
+	uint8_t		pad[3];		/* padding */
+	uint32_t	reserved;	/* unused */
+};
+
+struct nfhdr_v5 {
+	uint16_t	version;	/* version number */
+	uint16_t	count;		/* # of records */
+	uint32_t	msys_uptime;
+	uint32_t	utc_sec;
+	uint32_t	utc_nsec;
+	uint32_t	sequence;	/* flow sequence number */
+	uint8_t		engine_type;	/* type of flow-switching engine */
+	uint8_t		engine_id;	/* slot number of the flow-switching engine */
+	uint16_t	sampling_interval; /* sampling mode and interval */
+};
+
+struct nfrec_v5 {
+	struct in_addr	src_ina;
+	struct in_addr	dst_ina;
+	struct in_addr	nhop_ina;
+	uint16_t	input;		/* SNMP index of input interface */
+	uint16_t	output;		/* SNMP index of output interface */
+	uint32_t	packets;	/* packets in the flow */
+	uint32_t	octets;		/* layer 3 octets in the packets of the flow */
+	uint32_t	start_time;	/* sys_uptime value at start of flow */
+	uint32_t	last_time;	/* sys_uptime value when last packet of flow was received */
+	uint16_t	srcport;	/* TCP/UDP source port or equivalent */
+	uint16_t	dstport;	/* TCP/UDP source port or equivalent */
+	uint8_t		pad1;		/* pad */
+	uint8_t		tcp_flags;	/* cumulative OR of TCP flags */
+	uint8_t		proto;		/* IP protocol type */
+	uint8_t		tos;		/* IP type of service */
+	uint16_t	src_as;		/* AS number of the source */
+	uint16_t	dst_as;		/* AS number of the destination */
+	uint8_t		src_mask;	/* source address mask bits */
+	uint8_t		dst_mask;	/* destination address prefix mask bits */
+	uint16_t	pad2;
 	struct in_addr	peer_nexthop;	/* v6: IP address of the nexthop within the peer (FIB)*/
 };
 
-void
-cnfp_print(const u_char *cp, const u_char *bp _U_)
+struct nfhdr_v6 {
+	uint16_t	version;	/* version number */
+	uint16_t	count;		/* # of records */
+	uint32_t	msys_uptime;
+	uint32_t	utc_sec;
+	uint32_t	utc_nsec;
+	uint32_t	sequence;	/* v5 flow sequence number */
+	uint32_t	reserved;	/* v5 only */
+};
+
+struct nfrec_v6 {
+	struct in_addr	src_ina;
+	struct in_addr	dst_ina;
+	struct in_addr	nhop_ina;
+	uint16_t	input;		/* SNMP index of input interface */
+	uint16_t	output;		/* SNMP index of output interface */
+	uint32_t	packets;	/* packets in the flow */
+	uint32_t	octets;		/* layer 3 octets in the packets of the flow */
+	uint32_t	start_time;	/* sys_uptime value at start of flow */
+	uint32_t	last_time;	/* sys_uptime value when last packet of flow was received */
+	uint16_t	srcport;	/* TCP/UDP source port or equivalent */
+	uint16_t	dstport;	/* TCP/UDP source port or equivalent */
+	uint8_t		pad1;		/* pad */
+	uint8_t		tcp_flags;	/* cumulative OR of TCP flags */
+	uint8_t		proto;		/* IP protocol type */
+	uint8_t		tos;		/* IP type of service */
+	uint16_t	src_as;		/* AS number of the source */
+	uint16_t	dst_as;		/* AS number of the destination */
+	uint8_t		src_mask;	/* source address mask bits */
+	uint8_t		dst_mask;	/* destination address prefix mask bits */
+	uint16_t	flags;
+	struct in_addr	peer_nexthop;	/* v6: IP address of the nexthop within the peer (FIB)*/
+};
+
+static void
+cnfp_v1_print(netdissect_options *ndo, const u_char *cp)
 {
-	register const struct nfhdr *nh;
-	register const struct nfrec *nr;
+	register const struct nfhdr_v1 *nh;
+	register const struct nfrec_v1 *nr;
 	struct protoent *pent;
 	int nrecs, ver;
 #if 0
 	time_t t;
 #endif
 
-	nh = (const struct nfhdr *)cp;
+	nh = (const struct nfhdr_v1 *)cp;
+	ND_TCHECK(*nh);
 
-	if ((const u_char *)(nh + 1) > snapend)
-		return;
-
-	nrecs = EXTRACT_32BITS(&nh->ver_cnt) & 0xffff;
-	ver = (EXTRACT_32BITS(&nh->ver_cnt) & 0xffff0000) >> 16;
+	ver = EXTRACT_16BITS(&nh->version);
+	nrecs = EXTRACT_32BITS(&nh->count);
 #if 0
 	/*
 	 * This is seconds since the UN*X epoch, and is followed by
@@ -105,86 +178,299 @@
 	t = EXTRACT_32BITS(&nh->utc_sec);
 #endif
 
-	printf("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
+	ND_PRINT((ndo, "NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
 	       EXTRACT_32BITS(&nh->msys_uptime)/1000,
 	       EXTRACT_32BITS(&nh->msys_uptime)%1000,
-	       EXTRACT_32BITS(&nh->utc_sec), EXTRACT_32BITS(&nh->utc_nsec));
+	       EXTRACT_32BITS(&nh->utc_sec), EXTRACT_32BITS(&nh->utc_nsec)));
 
-	if (ver == 5 || ver == 6) {
-		printf("#%u, ", EXTRACT_32BITS(&nh->sequence));
-		nr = (const struct nfrec *)&nh[1];
-		snaplen -= 24;
-	} else {
-		nr = (const struct nfrec *)&nh->sequence;
-		snaplen -= 16;
-	}
+	nr = (const struct nfrec_v1 *)&nh[1];
 
-	printf("%2u recs", nrecs);
+	ND_PRINT((ndo, "%2u recs", nrecs));
 
-	for (; nrecs-- && (const u_char *)(nr + 1) <= snapend; nr++) {
+	for (; nrecs != 0; nr++, nrecs--) {
 		char buf[20];
 		char asbuf[20];
 
-		printf("\n  started %u.%03u, last %u.%03u",
+		/*
+		 * Make sure we have the entire record.
+		 */
+		ND_TCHECK(*nr);
+		ND_PRINT((ndo, "\n  started %u.%03u, last %u.%03u",
 		       EXTRACT_32BITS(&nr->start_time)/1000,
 		       EXTRACT_32BITS(&nr->start_time)%1000,
 		       EXTRACT_32BITS(&nr->last_time)/1000,
-		       EXTRACT_32BITS(&nr->last_time)%1000);
+		       EXTRACT_32BITS(&nr->last_time)%1000));
 
 		asbuf[0] = buf[0] = '\0';
-		if (ver == 5 || ver == 6) {
-			snprintf(buf, sizeof(buf), "/%u",
-				 (EXTRACT_32BITS(&nr->masks) >> 24) & 0xff);
-			snprintf(asbuf, sizeof(asbuf), ":%u",
-				 (EXTRACT_32BITS(&nr->asses) >> 16) & 0xffff);
-		}
-		printf("\n    %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf,
-			EXTRACT_32BITS(&nr->ports) >> 16);
+		ND_PRINT((ndo, "\n    %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf,
+			EXTRACT_16BITS(&nr->srcport)));
 
-		if (ver == 5 || ver ==6) {
-			snprintf(buf, sizeof(buf), "/%d",
-				 (EXTRACT_32BITS(&nr->masks) >> 16) & 0xff);
-			snprintf(asbuf, sizeof(asbuf), ":%u",
-				 EXTRACT_32BITS(&nr->asses) & 0xffff);
-		}
-		printf("> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf,
-			EXTRACT_32BITS(&nr->ports) & 0xffff);
+		ND_PRINT((ndo, "> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf,
+			EXTRACT_16BITS(&nr->dstport)));
 
-		printf(">> %s\n    ", intoa(nr->nhop_ina.s_addr));
+		ND_PRINT((ndo, ">> %s\n    ", intoa(nr->nhop_ina.s_addr)));
 
-		pent = getprotobynumber((EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff);
-		if (!pent || nflag)
-			printf("%u ",
-			       (EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff);
+		pent = getprotobynumber(nr->proto);
+		if (!pent || ndo->ndo_nflag)
+			ND_PRINT((ndo, "%u ", nr->proto));
 		else
-			printf("%s ", pent->p_name);
+			ND_PRINT((ndo, "%s ", pent->p_name));
 
 		/* tcp flags for tcp only */
 		if (pent && pent->p_proto == IPPROTO_TCP) {
 			int flags;
-			if (ver == 1)
-				flags = (EXTRACT_32BITS(&nr->asses) >> 24) & 0xff;
-			else
-				flags = (EXTRACT_32BITS(&nr->proto_tos) >> 16) & 0xff;
-			if (flags & TH_FIN)	putchar('F');
-			if (flags & TH_SYN)	putchar('S');
-			if (flags & TH_RST)	putchar('R');
-			if (flags & TH_PUSH)	putchar('P');
-			if (flags & TH_ACK)	putchar('A');
-			if (flags & TH_URG)	putchar('U');
-			if (flags)
-				putchar(' ');
+			flags = nr->tcp_flags;
+			ND_PRINT((ndo, "%s%s%s%s%s%s%s",
+				flags & TH_FIN  ? "F" : "",
+				flags & TH_SYN  ? "S" : "",
+				flags & TH_RST  ? "R" : "",
+				flags & TH_PUSH ? "P" : "",
+				flags & TH_ACK  ? "A" : "",
+				flags & TH_URG  ? "U" : "",
+				flags           ? " " : ""));
 		}
 
 		buf[0]='\0';
-		if (ver == 6) {
-			snprintf(buf, sizeof(buf), "(%u<>%u encaps)",
-				 (EXTRACT_32BITS(&nr->masks) >> 8) & 0xff,
-				 (EXTRACT_32BITS(&nr->masks)) & 0xff);
-		}
-		printf("tos %u, %u (%u octets) %s",
-		       EXTRACT_32BITS(&nr->proto_tos) & 0xff,
+		ND_PRINT((ndo, "tos %u, %u (%u octets) %s",
+		       nr->tos,
 		       EXTRACT_32BITS(&nr->packets),
-		       EXTRACT_32BITS(&nr->octets), buf);
+		       EXTRACT_32BITS(&nr->octets), buf));
 	}
+	return;
+
+trunc:
+	ND_PRINT((ndo, "[|cnfp]"));
+	return;
+}
+
+static void
+cnfp_v5_print(netdissect_options *ndo, const u_char *cp)
+{
+	register const struct nfhdr_v5 *nh;
+	register const struct nfrec_v5 *nr;
+	struct protoent *pent;
+	int nrecs, ver;
+#if 0
+	time_t t;
+#endif
+
+	nh = (const struct nfhdr_v5 *)cp;
+	ND_TCHECK(*nh);
+
+	ver = EXTRACT_16BITS(&nh->version);
+	nrecs = EXTRACT_32BITS(&nh->count);
+#if 0
+	/*
+	 * This is seconds since the UN*X epoch, and is followed by
+	 * nanoseconds.  XXX - format it, rather than just dumping the
+	 * raw seconds-since-the-Epoch.
+	 */
+	t = EXTRACT_32BITS(&nh->utc_sec);
+#endif
+
+	ND_PRINT((ndo, "NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
+	       EXTRACT_32BITS(&nh->msys_uptime)/1000,
+	       EXTRACT_32BITS(&nh->msys_uptime)%1000,
+	       EXTRACT_32BITS(&nh->utc_sec), EXTRACT_32BITS(&nh->utc_nsec)));
+
+	ND_PRINT((ndo, "#%u, ", EXTRACT_32BITS(&nh->sequence)));
+	nr = (const struct nfrec_v5 *)&nh[1];
+
+	ND_PRINT((ndo, "%2u recs", nrecs));
+
+	for (; nrecs != 0; nr++, nrecs--) {
+		char buf[20];
+		char asbuf[20];
+
+		/*
+		 * Make sure we have the entire record.
+		 */
+		ND_TCHECK(*nr);
+		ND_PRINT((ndo, "\n  started %u.%03u, last %u.%03u",
+		       EXTRACT_32BITS(&nr->start_time)/1000,
+		       EXTRACT_32BITS(&nr->start_time)%1000,
+		       EXTRACT_32BITS(&nr->last_time)/1000,
+		       EXTRACT_32BITS(&nr->last_time)%1000));
+
+		asbuf[0] = buf[0] = '\0';
+		snprintf(buf, sizeof(buf), "/%u", nr->src_mask);
+		snprintf(asbuf, sizeof(asbuf), ":%u",
+			EXTRACT_16BITS(&nr->src_as));
+		ND_PRINT((ndo, "\n    %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf,
+			EXTRACT_16BITS(&nr->srcport)));
+
+		snprintf(buf, sizeof(buf), "/%d", nr->dst_mask);
+		snprintf(asbuf, sizeof(asbuf), ":%u",
+			 EXTRACT_16BITS(&nr->dst_as));
+		ND_PRINT((ndo, "> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf,
+			EXTRACT_16BITS(&nr->dstport)));
+
+		ND_PRINT((ndo, ">> %s\n    ", intoa(nr->nhop_ina.s_addr)));
+
+		pent = getprotobynumber(nr->proto);
+		if (!pent || ndo->ndo_nflag)
+			ND_PRINT((ndo, "%u ", nr->proto));
+		else
+			ND_PRINT((ndo, "%s ", pent->p_name));
+
+		/* tcp flags for tcp only */
+		if (pent && pent->p_proto == IPPROTO_TCP) {
+			int flags;
+			flags = nr->tcp_flags;
+			ND_PRINT((ndo, "%s%s%s%s%s%s%s",
+				flags & TH_FIN  ? "F" : "",
+				flags & TH_SYN  ? "S" : "",
+				flags & TH_RST  ? "R" : "",
+				flags & TH_PUSH ? "P" : "",
+				flags & TH_ACK  ? "A" : "",
+				flags & TH_URG  ? "U" : "",
+				flags           ? " " : ""));
+		}
+
+		buf[0]='\0';
+		ND_PRINT((ndo, "tos %u, %u (%u octets) %s",
+		       nr->tos,
+		       EXTRACT_32BITS(&nr->packets),
+		       EXTRACT_32BITS(&nr->octets), buf));
+	}
+	return;
+
+trunc:
+	ND_PRINT((ndo, "[|cnfp]"));
+	return;
+}
+
+static void
+cnfp_v6_print(netdissect_options *ndo, const u_char *cp)
+{
+	register const struct nfhdr_v6 *nh;
+	register const struct nfrec_v6 *nr;
+	struct protoent *pent;
+	int nrecs, ver;
+#if 0
+	time_t t;
+#endif
+
+	nh = (const struct nfhdr_v6 *)cp;
+	ND_TCHECK(*nh);
+
+	ver = EXTRACT_16BITS(&nh->version);
+	nrecs = EXTRACT_32BITS(&nh->count);
+#if 0
+	/*
+	 * This is seconds since the UN*X epoch, and is followed by
+	 * nanoseconds.  XXX - format it, rather than just dumping the
+	 * raw seconds-since-the-Epoch.
+	 */
+	t = EXTRACT_32BITS(&nh->utc_sec);
+#endif
+
+	ND_PRINT((ndo, "NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
+	       EXTRACT_32BITS(&nh->msys_uptime)/1000,
+	       EXTRACT_32BITS(&nh->msys_uptime)%1000,
+	       EXTRACT_32BITS(&nh->utc_sec), EXTRACT_32BITS(&nh->utc_nsec)));
+
+	ND_PRINT((ndo, "#%u, ", EXTRACT_32BITS(&nh->sequence)));
+	nr = (const struct nfrec_v6 *)&nh[1];
+
+	ND_PRINT((ndo, "%2u recs", nrecs));
+
+	for (; nrecs != 0; nr++, nrecs--) {
+		char buf[20];
+		char asbuf[20];
+
+		/*
+		 * Make sure we have the entire record.
+		 */
+		ND_TCHECK(*nr);
+		ND_PRINT((ndo, "\n  started %u.%03u, last %u.%03u",
+		       EXTRACT_32BITS(&nr->start_time)/1000,
+		       EXTRACT_32BITS(&nr->start_time)%1000,
+		       EXTRACT_32BITS(&nr->last_time)/1000,
+		       EXTRACT_32BITS(&nr->last_time)%1000));
+
+		asbuf[0] = buf[0] = '\0';
+		snprintf(buf, sizeof(buf), "/%u", nr->src_mask);
+		snprintf(asbuf, sizeof(asbuf), ":%u",
+			EXTRACT_16BITS(&nr->src_as));
+		ND_PRINT((ndo, "\n    %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf,
+			EXTRACT_16BITS(&nr->srcport)));
+
+		snprintf(buf, sizeof(buf), "/%d", nr->dst_mask);
+		snprintf(asbuf, sizeof(asbuf), ":%u",
+			 EXTRACT_16BITS(&nr->dst_as));
+		ND_PRINT((ndo, "> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf,
+			EXTRACT_16BITS(&nr->dstport)));
+
+		ND_PRINT((ndo, ">> %s\n    ", intoa(nr->nhop_ina.s_addr)));
+
+		pent = getprotobynumber(nr->proto);
+		if (!pent || ndo->ndo_nflag)
+			ND_PRINT((ndo, "%u ", nr->proto));
+		else
+			ND_PRINT((ndo, "%s ", pent->p_name));
+
+		/* tcp flags for tcp only */
+		if (pent && pent->p_proto == IPPROTO_TCP) {
+			int flags;
+			flags = nr->tcp_flags;
+			ND_PRINT((ndo, "%s%s%s%s%s%s%s",
+				flags & TH_FIN  ? "F" : "",
+				flags & TH_SYN  ? "S" : "",
+				flags & TH_RST  ? "R" : "",
+				flags & TH_PUSH ? "P" : "",
+				flags & TH_ACK  ? "A" : "",
+				flags & TH_URG  ? "U" : "",
+				flags           ? " " : ""));
+		}
+
+		buf[0]='\0';
+		snprintf(buf, sizeof(buf), "(%u<>%u encaps)",
+			 (EXTRACT_16BITS(&nr->flags) >> 8) & 0xff,
+			 (EXTRACT_16BITS(&nr->flags)) & 0xff);
+		ND_PRINT((ndo, "tos %u, %u (%u octets) %s",
+		       nr->tos,
+		       EXTRACT_32BITS(&nr->packets),
+		       EXTRACT_32BITS(&nr->octets), buf));
+	}
+	return;
+
+trunc:
+	ND_PRINT((ndo, "[|cnfp]"));
+	return;
+}
+
+void
+cnfp_print(netdissect_options *ndo, const u_char *cp)
+{
+	int ver;
+
+	/*
+	 * First 2 bytes are the version number.
+	 */
+	ND_TCHECK2(*cp, 2);
+	ver = EXTRACT_16BITS(cp);
+	switch (ver) {
+
+	case 1:
+		cnfp_v1_print(ndo, cp);
+		break;
+
+	case 5:
+		cnfp_v5_print(ndo, cp);
+		break;
+
+	case 6:
+		cnfp_v6_print(ndo, cp);
+		break;
+
+	default:
+		ND_PRINT((ndo, "NetFlow v%x", ver));
+		break;
+	}
+	return;
+
+trunc:
+	ND_PRINT((ndo, "[|cnfp]"));
+	return;
 }