* Routines for BACnet/IP (BVLL, BVLC) dissection
* Copyright 2001, Hartmut Mueller <hartmut@abmlinux.org>, FH Dortmund
*
- * $Id: packet-bvlc.c,v 1.11 2002/07/17 00:42:40 guy Exp $
+ * $Id: packet-bvlc.c,v 1.13 2002/08/28 21:00:08 jmayer Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
#include "prefs.h"
#include <epan/strutil.h>
-#ifdef HAVE_SYS_TYPES_H
-# include <sys/types.h>
-#endif
-
-#ifdef HAVE_NETINET_IN_H
-# include <netinet/in.h>
-#endif
-
#include <glib.h>
#include <epan/packet.h>
proto_tree *bvlc_tree;
proto_tree *bdt_tree; /* Broadcast Distribution Table */
proto_tree *fdt_tree; /* Foreign Device Table */
-
+
gint offset;
guint8 bvlc_type;
guint8 bvlc_function;
packet_length = tvb_get_ntohs(tvb, offset+2);
if (bvlc_function > 0x08) {
/* We have a constant header length of BVLC of 4 in every
- * BVLC-packet forewarding an NPDU. Beware: Changes in the
- * BACnet-IP-standard may break this.
+ * BVLC-packet forewarding an NPDU. Beware: Changes in the
+ * BACnet-IP-standard may break this.
* At the moment, no functions above 0x0b
* exist (Addendum 135a to ANSI/ASHRAE 135-1995 - BACnet)
*/
bvlc_length = 4;
} else if(bvlc_function == 0x04) {
/* 4 Bytes + 6 Bytes for B/IP Address of Originating Device */
- bvlc_length = 10;
+ bvlc_length = 10;
} else {
- /* BVLC-packets with function below 0x09 contain
+ /* BVLC-packets with function below 0x09 contain
* routing-level data (e.g. Broadcast Distribution)
* but no NPDU for BACnet, so bvlc_length goes up to the end
* of the captured frame.
*/
bvlc_length = packet_length;
}
-
+
if (tree) {
- ti = proto_tree_add_item(tree, proto_bvlc, tvb, 0,
+ ti = proto_tree_add_item(tree, proto_bvlc, tvb, 0,
bvlc_length, FALSE);
bvlc_tree = proto_item_add_subtree(ti, ett_bvlc);
- proto_tree_add_uint_format(bvlc_tree, hf_bvlc_type, tvb, offset, 1,
+ proto_tree_add_uint_format(bvlc_tree, hf_bvlc_type, tvb, offset, 1,
bvlc_type,"Type: 0x%x (Version %s)",bvlc_type,
(bvlc_type == 0x81)?"BACnet/IP (Annex J)":"unknown");
offset ++;
- proto_tree_add_uint_format(bvlc_tree, hf_bvlc_function, tvb,
- offset, 1, bvlc_function,"Function: 0x%02x (%s)",
+ proto_tree_add_uint_format(bvlc_tree, hf_bvlc_function, tvb,
+ offset, 1, bvlc_function,"Function: 0x%02x (%s)",
bvlc_function, val_to_str (bvlc_function,
bvlc_function_names, "Unknown"));
offset ++;
- proto_tree_add_uint_format(bvlc_tree, hf_bvlc_length, tvb, offset,
- 2, bvlc_length, "BVLC-Length: %d of %d bytes BACnet packet length",
+ proto_tree_add_uint_format(bvlc_tree, hf_bvlc_length, tvb, offset,
+ 2, bvlc_length, "BVLC-Length: %d of %d bytes BACnet packet length",
bvlc_length, packet_length);
offset += 2;
switch (bvlc_function) {
*/
/* We should bitmask the result correctly when we have a
* packet to dissect, see README.developer, 1.6.2, FID */
- proto_tree_add_uint_format(bvlc_tree, hf_bvlc_result, tvb,
- offset, 2, bvlc_result,"Result: 0x%04x (%s)",
- bvlc_result, val_to_str(bvlc_result << 4,
+ proto_tree_add_uint_format(bvlc_tree, hf_bvlc_result, tvb,
+ offset, 2, bvlc_result,"Result: 0x%04x (%s)",
+ bvlc_result, val_to_str(bvlc_result << 4,
bvlc_result_names, "Unknown"));
offset += 2;
break;
proto_tree_add_item(bdt_tree, hf_bvlc_bdt_port,
tvb, offset, 2, FALSE);
offset += 2;
- proto_tree_add_item(bdt_tree,
+ proto_tree_add_item(bdt_tree,
hf_bvlc_bdt_mask, tvb, offset, 4,
FALSE);
offset += 4;
- }
+ }
/* We check this if we get a BDT-packet somewhere */
break;
case 0x02: /* Read-Broadcast-Distribution-Table */
break;
case 0x07: /* Read-Foreign-Device-Table-Ack */
/* List of FDT Entries: N*10-octet */
- /* N indicates the number of entries in the FDT whose
- * contents are being returned. Each returned entry
- * consists of the 6-octet B/IP address of the registrant;
+ /* N indicates the number of entries in the FDT whose
+ * contents are being returned. Each returned entry
+ * consists of the 6-octet B/IP address of the registrant;
* the 2-octet Time-to-Live value supplied at the time of
- * registration; and a 2-octet value representing the
- * number of seconds remaining before the BBMD will purge
+ * registration; and a 2-octet value representing the
+ * number of seconds remaining before the BBMD will purge
* the registrant's FDT entry if no re-registration occurs.
*/
ti_fdt = proto_tree_add_item(bvlc_tree, proto_bvlc, tvb,
proto_tree_add_item(fdt_tree, hf_bvlc_fdt_port,
tvb, offset, 2, FALSE);
offset += 2;
- proto_tree_add_item(fdt_tree,
+ proto_tree_add_item(fdt_tree,
hf_bvlc_fdt_ttl, tvb, offset, 2,
FALSE);
offset += 2;
- proto_tree_add_item(fdt_tree,
+ proto_tree_add_item(fdt_tree,
hf_bvlc_fdt_timeout, tvb, offset, 2,
FALSE);
offset += 2;
- }
+ }
/* We check this if we get a FDT-packet somewhere */
break;
case 0x08: /* Delete-Foreign-Device-Table-Entry */
npdu_length = packet_length - bvlc_length;
next_tvb = tvb_new_subset(tvb,bvlc_length,-1,npdu_length);
/* Code from Guy Harris */
- if (!dissector_try_port(bvlc_dissector_table,
+ if (!dissector_try_port(bvlc_dissector_table,
bvlc_function, next_tvb, pinfo, tree)) {
/* Unknown function - dissect the paylod as data */
call_dissector(data_handle,next_tvb, pinfo, tree);
}
/* Taken from add-135a (BACnet-IP-standard paper):
*
- * The default UDP port for both directed messages and broadcasts shall
- * be X'BAC0' and all B/IP devices shall support it. In some cases,
- * e.g., a situation where it is desirable for two groups of BACnet devices
- * to coexist independently on the same IP subnet, the UDP port may be
- * configured locally to a different value without it being considered
+ * The default UDP port for both directed messages and broadcasts shall
+ * be X'BAC0' and all B/IP devices shall support it. In some cases,
+ * e.g., a situation where it is desirable for two groups of BACnet devices
+ * to coexist independently on the same IP subnet, the UDP port may be
+ * configured locally to a different value without it being considered
* a violation of this protocol.
*
* This dissector does not analyse UDP packets other than on port 0xBAC0.
git.samba.org / obnox / wireshark / wip.git / blobdiff