forked from osmocom/wireshark
141 lines
4.3 KiB
C
141 lines
4.3 KiB
C
/* packet-ipfc.c
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* Routines for Decoding Network_Header for IP-over-FC when we only
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* capture the frame starting at the Network_Header (as opposed to
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* when we have the full FC frame).
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* See RFC 2625.
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* Copyright 2001, Dinesh G Dutt <ddutt@cisco.com>
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*
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* $Id: packet-ipfc.c,v 1.6 2003/01/21 05:21:03 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <glib.h>
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#include <epan/packet.h>
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#include "etypes.h"
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#include "packet-fc.h"
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#include "packet-ipfc.h"
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#include "packet-llc.h"
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/* Initialize the protocol and registered fields */
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static int proto_ipfc = -1;
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static int hf_ipfc_network_da = -1;
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static int hf_ipfc_network_sa = -1;
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/* Initialize the subtree pointers */
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static gint ett_ipfc = -1;
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static dissector_handle_t llc_handle;
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void
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capture_ipfc (const guchar *pd, int len, packet_counts *ld)
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{
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if (!BYTES_ARE_IN_FRAME(0, len, 16)) {
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ld->other++;
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return;
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}
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capture_llc(pd, 16, len, ld);
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}
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static void
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dissect_ipfc (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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/* Set up structures needed to add the protocol subtree and manage it */
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proto_item *ti;
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proto_tree *ipfc_tree;
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int offset = 0;
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tvbuff_t *next_tvb;
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/* Make entries in Protocol column and Info column on summary display */
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "IP/FC");
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if (tree) {
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ti = proto_tree_add_protocol_format (tree, proto_ipfc, tvb, offset, 16,
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"IP Over FC Network_Header");
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ipfc_tree = proto_item_add_subtree (ti, ett_ipfc);
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proto_tree_add_string (ipfc_tree, hf_ipfc_network_da, tvb, offset, 8,
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fcwwn_to_str (tvb_get_ptr (tvb, offset, 8)));
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proto_tree_add_string (ipfc_tree, hf_ipfc_network_sa, tvb, offset+8, 8,
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fcwwn_to_str (tvb_get_ptr (tvb, offset+8, 8)));
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}
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next_tvb = tvb_new_subset (tvb, 16, -1, -1);
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call_dissector(llc_handle, next_tvb, pinfo, tree);
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}
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/* Register the protocol with Ethereal */
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/* this format is require because a script is used to build the C function
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that calls all the protocol registration.
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*/
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void
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proto_register_ipfc (void)
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{
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/* Setup list of header fields See Section 1.6.1 for details*/
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static hf_register_info hf[] = {
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{ &hf_ipfc_network_da,
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{"Network DA", "ipfc.nh.da", FT_STRING, BASE_HEX, NULL,
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0x0, "", HFILL}},
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{ &hf_ipfc_network_sa,
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{"Network SA", "ipfc.nh.sa", FT_STRING, BASE_HEX, NULL,
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0x0, "", HFILL}},
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};
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/* Setup protocol subtree array */
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static gint *ett[] = {
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&ett_ipfc,
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};
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/* Register the protocol name and description */
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proto_ipfc = proto_register_protocol("IP Over FC", "IPFC", "ipfc");
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/* Required function calls to register the header fields and subtrees used */
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proto_register_field_array(proto_ipfc, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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/* If this dissector uses sub-dissector registration add a registration routine.
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This format is required because a script is used to find these routines and
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create the code that calls these routines.
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*/
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void
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proto_reg_handoff_ipfc (void)
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{
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dissector_handle_t ipfc_handle;
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ipfc_handle = create_dissector_handle (dissect_ipfc, proto_ipfc);
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dissector_add("wtap_encap", WTAP_ENCAP_IP_OVER_FC, ipfc_handle);
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llc_handle = find_dissector ("llc");
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}
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