Nathan Neulinger's NTP dissector.

svn path=/trunk/; revision=828

1 files changed, 150 insertions, 0 deletions

diff --git a/packet-ntp.c b/packet-ntp.c
new file mode 100644
index 0000000000..39cf4a358b
--- /dev/null
+++ b/packet-ntp.c
@@ -0,0 +1,150 @@
+/* packet-ntp.c
+ * Routines for NTP packet dissection
+ * Copyright 1999, Nathan Neulinger <nneul@umr.edu>
+ *
+ * $Id: packet-ntp.c,v 1.1 1999/10/14 05:10:30 guy Exp $
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@unicom.net>
+ * Copyright 1998 Gerald Combs
+ *
+ * Copied from packet-tftp.c
+ * 
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <stdio.h>
+
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+
+#ifdef HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#endif
+
+#include <string.h>
+#include <glib.h>
+#include "packet.h"
+#include "packet-ntp.h"
+
+static int proto_ntp = -1;
+static int hf_ntp_flags = -1;
+static int hf_ntp_stratum = -1;
+static int hf_ntp_ppoll = -1;
+static int hf_ntp_precision = -1;
+static int hf_ntp_rootdelay = -1;
+static int hf_ntp_rootdispersion = -1;
+static int hf_ntp_refid = -1;
+static int hf_ntp_reftime = -1;
+static int hf_ntp_org = -1;
+static int hf_ntp_rec = -1;
+static int hf_ntp_xmt = -1;
+static int hf_ntp_keyid = -1;
+static int hf_ntp_mac = -1;
+
+void
+dissect_ntp(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
+{
+	proto_tree      *ntp_tree, *ti;
+	struct ntp_packet *pkt;
+
+	/* get at least a full packet structure */
+	if ( !BYTES_ARE_IN_FRAME(offset, 48) ) /* 48 without keyid or mac */
+		return;
+
+	pkt = (struct ntp_packet *) &pd[offset];
+	
+	if (check_col(fd, COL_PROTOCOL))
+		col_add_str(fd, COL_PROTOCOL, "NTP");
+
+	if (check_col(fd, COL_INFO))
+		col_add_str(fd, COL_INFO, "NTP");
+
+	if (tree) {
+		ti = proto_tree_add_item(tree, proto_ntp, offset, END_OF_FRAME, NULL);
+		ntp_tree = proto_item_add_subtree(ti, ETT_NTP);
+
+		proto_tree_add_item(ntp_tree, hf_ntp_flags, offset, 1, pkt->flags);
+		proto_tree_add_item(ntp_tree, hf_ntp_stratum, offset+1, 1, pkt->stratum);
+		proto_tree_add_item(ntp_tree, hf_ntp_ppoll, offset+2, 1, pkt->ppoll);
+		proto_tree_add_item(ntp_tree, hf_ntp_precision, offset+3, 1, pkt->precision);
+		proto_tree_add_item(ntp_tree, hf_ntp_rootdelay, offset+4, 4, pkt->rootdelay);
+		proto_tree_add_item(ntp_tree, hf_ntp_rootdispersion, offset+8, 4, pkt->rootdispersion);
+		proto_tree_add_item(ntp_tree, hf_ntp_refid, offset+12, 4, pkt->refid);
+		proto_tree_add_item(ntp_tree, hf_ntp_reftime, offset+16, 8, pkt->reftime);
+		proto_tree_add_item(ntp_tree, hf_ntp_org, offset+24, 8, pkt->org);
+		proto_tree_add_item(ntp_tree, hf_ntp_rec, offset+32, 8, pkt->rec);
+		proto_tree_add_item(ntp_tree, hf_ntp_xmt, offset+40, 8, pkt->xmt);
+
+		if ( BYTES_ARE_IN_FRAME(offset, 50) )
+			proto_tree_add_item(ntp_tree, hf_ntp_keyid, offset+48, 4, pkt->keyid);
+		if ( BYTES_ARE_IN_FRAME(offset, 53) )
+			proto_tree_add_item(ntp_tree, hf_ntp_mac, offset+52, END_OF_FRAME, pkt->mac);
+	}
+}
+
+void
+proto_register_ntp(void)
+{
+	static hf_register_info hf[] = {
+			{ &hf_ntp_flags, {	
+				"Flags", "ntp.flags", FT_BYTES, BASE_HEX, 
+				NULL, 0, "Flags (Leap/Version/Mode)" }},
+			{ &hf_ntp_stratum, {	
+				"Peer Clock Stratum", "ntp.stratum", FT_BYTES, BASE_HEX, 
+				NULL, 0, "Peer Clock Stratum" }},
+			{ &hf_ntp_ppoll, {	
+				"Peer Polling Interval", "ntp.ppoll", FT_BYTES, BASE_HEX, 
+				NULL, 0, "Peer Polling Interval" }},
+			{ &hf_ntp_precision, {	
+				"Peer Clock Precision", "ntp.precision", FT_BYTES, BASE_HEX, 
+				NULL, 0, "Peer Clock Precision" }},
+			{ &hf_ntp_rootdelay, {	
+				"Distance to Primary", "ntp.rootdelay", FT_BYTES, BASE_HEX, 
+				NULL, 0, "Distance to Primary" }},
+			{ &hf_ntp_rootdispersion, {	
+				"Clock Dispersion", "ntp.rootdispersion", FT_BYTES, BASE_HEX, 
+				NULL, 0, "Clock Dispersion" }},
+			{ &hf_ntp_refid, {	
+				"Reference Clock ID", "ntp.refid", FT_BYTES, BASE_HEX, 
+				NULL, 0, "Reference Clock ID" }},
+			{ &hf_ntp_reftime, {	
+				"Reference Clock Update Time", "ntp.reftime", FT_BYTES, BASE_HEX, 
+				NULL, 0, "Reference Clock Update Time" }},
+			{ &hf_ntp_org, {	
+				"Originate Time Stamp", "ntp.org", FT_BYTES, BASE_HEX, 
+				NULL, 0, "Originate Time Stamp" }},
+			{ &hf_ntp_rec, {	
+				"Receive Time Stamp", "ntp.rec", FT_BYTES, BASE_HEX, 
+				NULL, 0, "Receive Time Stamp" }},
+			{ &hf_ntp_xmt, {	
+				"Transmit Time Stamp", "ntp.xmt", FT_BYTES, BASE_HEX, 
+				NULL, 0, "Transmit Time Stamp" }},
+			{ &hf_ntp_keyid, {	
+				"Key ID", "ntp.keyid", FT_BYTES, BASE_HEX, 
+				NULL, 0, "Key ID" }},
+			{ &hf_ntp_mac, {	
+				"Message Authentication Code", "ntp.mac", FT_BYTES, BASE_HEX, 
+				NULL, 0, "Message Authentication Code" }},
+        };
+
+	proto_ntp = proto_register_protocol("Network Time Protocol", "ntp");
+	proto_register_field_array(proto_ntp, hf, array_length(hf));
+}