add cisco NetFlow support from OpenBSD.

1 files changed, 164 insertions, 0 deletions

diff --git a/print-cnfp.c b/print-cnfp.c
new file mode 100644
index 00000000..025b78c5
--- /dev/null
+++ b/print-cnfp.c
@@ -0,0 +1,164 @@
+/*	$OpenBSD: print-cnfp.c,v 1.2 1998/06/25 20:26:59 mickey Exp $	*/
+
+/*
+ * Copyright (c) 1998 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Michael Shalayeff.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * 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 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 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.
+ */
+
+/* Cisco NetFlow protocol */
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <netdb.h>
+
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+
+#include <stdio.h>
+#include <string.h>
+
+#include "interface.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 nfrec {
+	in_addr_t	src_ina;
+	in_addr_t	dst_ina;
+	in_addr_t	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 */
+
+};
+
+void
+cnfp_print(const u_char *cp, u_int len, const u_char *bp)
+{
+	register const struct nfhdr *nh;
+	register const struct nfrec *nr;
+	register const struct ip *ip;
+	struct protoent *pent;
+	int nrecs, ver;
+	time_t t;
+	char *p;
+
+	ip = (struct ip *)bp;
+	nh = (struct nfhdr *)cp;
+
+	if ((u_char *)(nh + 1) > snapend)
+		return;
+
+	nrecs = ntohl(nh->ver_cnt) & 0xffff;
+	ver = (ntohl(nh->ver_cnt) & 0xffff0000) >> 16;
+	t = ntohl(nh->utc_sec);
+/*	(p = ctime(&t))[24] = '\0'; */
+
+	printf("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
+	       ntohl(nh->msys_uptime)/1000, ntohl(nh->msys_uptime)%1000,
+	       ntohl(nh->utc_sec), ntohl(nh->utc_nsec));
+
+	if (ver == 5) {
+		printf("#%u, ", htonl(nh->sequence));
+		nr = (struct nfrec *)&nh[1];
+		snaplen -= 24;
+	} else {
+		nr = (struct nfrec *)&nh->sequence;
+		snaplen -= 16;
+	}
+
+	printf("%2u recs", nrecs);
+
+	for (; nrecs-- && (u_char *)(nr + 1) <= snapend; nr++) {
+		char buf[5];
+		char asbuf[7];
+
+		printf("\n  started %u.%03u, last %u.%03u",
+			ntohl(nr->start_time)/1000, ntohl(nr->start_time)%1000,
+			ntohl(nr->last_time)/1000, ntohl(nr->last_time)%1000);
+
+		asbuf[0] = buf[0] = '\0';
+		if (ver == 5) {
+			sprintf(buf, "/%d", (ntohl(nr->masks) >> 24) & 0xff);
+			sprintf(asbuf, "%d:", (ntohl(nr->asses) >> 16) & 0xffff);
+		}
+		printf("\n    %s%s%s:%u ", inet_ntoa(nr->src_ina), buf, asbuf,
+			ntohl(nr->ports) >> 16);
+
+		if (ver == 5) {
+			sprintf(buf, "/%d", (ntohl(nr->masks) >> 16) & 0xff);
+			sprintf(asbuf, "%d:", ntohl(nr->asses) & 0xffff);
+		}
+		printf("> %s%s%s:%u ", inet_ntoa(nr->dst_ina), buf, asbuf,
+			ntohl(nr->ports) & 0xffff);
+
+		printf(">> %s\n    ", inet_ntoa(nr->nhop_ina));
+
+		pent = getprotobynumber((ntohl(nr->proto_tos) >> 8) & 0xff);
+		if (!pent || nflag)
+			printf("%u ", (ntohl(nr->proto_tos) >> 8) & 0xff);
+		else
+			printf("%s ", pent->p_name);
+
+		/* tcp flags for tcp only */
+		if (pent && pent->p_proto == IPPROTO_TCP) {
+			int flags;
+			if (ver == 1)
+				flags = (ntohl(nr->asses) >> 24) & 0xff;
+			else
+				flags = (ntohl(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(' ');
+		}
+		printf("tos %u, %u (%u octets)", ntohl(nr->proto_tos) & 0xff,
+			ntohl(nr->packets), ntohl(nr->octets));
+
+
+	}
+
+}
+