151 lines
4.8 KiB
C
151 lines
4.8 KiB
C
/* packet-ipfc.c
|
|
* Routines for Decoding Network_Header for IP-over-FC when we only
|
|
* capture the frame starting at the Network_Header (as opposed to
|
|
* when we have the full FC frame).
|
|
* See RFC 2625.
|
|
* Copyright 2001, Dinesh G Dutt <ddutt@cisco.com>
|
|
*
|
|
* Wireshark - Network traffic analyzer
|
|
* By Gerald Combs <gerald@wireshark.org>
|
|
* Copyright 1998 Gerald Combs
|
|
*
|
|
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <epan/packet.h>
|
|
#include <epan/capture_dissectors.h>
|
|
#include <wiretap/wtap.h>
|
|
#include <epan/to_str.h>
|
|
|
|
#include "packet-llc.h"
|
|
|
|
void proto_register_ipfc(void);
|
|
void proto_reg_handoff_ipfc(void);
|
|
|
|
/* Initialize the protocol and registered fields */
|
|
static int proto_ipfc = -1;
|
|
static int hf_ipfc_network_da = -1;
|
|
static int hf_ipfc_network_sa = -1;
|
|
|
|
/* Initialize the subtree pointers */
|
|
static gint ett_ipfc = -1;
|
|
static dissector_handle_t llc_handle;
|
|
static capture_dissector_handle_t llc_cap_handle;
|
|
|
|
static gboolean
|
|
capture_ipfc (const guchar *pd, int offset _U_, int len, capture_packet_info_t *cpinfo, const union wtap_pseudo_header *pseudo_header _U_)
|
|
{
|
|
if (!BYTES_ARE_IN_FRAME(0, len, 16))
|
|
return FALSE;
|
|
|
|
return call_capture_dissector(llc_cap_handle, pd, 16, len, cpinfo, pseudo_header);
|
|
}
|
|
|
|
static int
|
|
dissect_ipfc (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
|
|
/* Set up structures needed to add the protocol subtree and manage it */
|
|
proto_item *ti;
|
|
proto_tree *ipfc_tree;
|
|
int offset = 0;
|
|
tvbuff_t *next_tvb;
|
|
|
|
/* Make entries in Protocol column and Info column on summary display */
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "IP/FC");
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_protocol_format (tree, proto_ipfc, tvb, offset, 16,
|
|
"IP Over FC Network_Header");
|
|
ipfc_tree = proto_item_add_subtree (ti, ett_ipfc);
|
|
|
|
proto_tree_add_item (ipfc_tree, hf_ipfc_network_da, tvb, offset, 8, ENC_NA);
|
|
proto_tree_add_item (ipfc_tree, hf_ipfc_network_sa, tvb, offset+8, 8, ENC_NA);
|
|
}
|
|
|
|
next_tvb = tvb_new_subset_remaining (tvb, 16);
|
|
call_dissector(llc_handle, next_tvb, pinfo, tree);
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
/* Register the protocol with Wireshark */
|
|
|
|
/* this format is require because a script is used to build the C function
|
|
that calls all the protocol registration.
|
|
*/
|
|
|
|
void
|
|
proto_register_ipfc (void)
|
|
{
|
|
|
|
/* Setup list of header fields See Section 1.6.1 for details*/
|
|
static hf_register_info hf[] = {
|
|
{ &hf_ipfc_network_da,
|
|
{"Network DA", "ipfc.nh.da", FT_FCWWN, BASE_NONE, NULL,
|
|
0x0, NULL, HFILL}},
|
|
{ &hf_ipfc_network_sa,
|
|
{"Network SA", "ipfc.nh.sa", FT_FCWWN, BASE_NONE, NULL,
|
|
0x0, NULL, HFILL}},
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] = {
|
|
&ett_ipfc,
|
|
};
|
|
|
|
/* Register the protocol name and description */
|
|
proto_ipfc = proto_register_protocol("IP Over FC", "IPFC", "ipfc");
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
proto_register_field_array(proto_ipfc, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
/* If this dissector uses sub-dissector registration add a registration routine.
|
|
This format is required because a script is used to find these routines and
|
|
create the code that calls these routines.
|
|
*/
|
|
void
|
|
proto_reg_handoff_ipfc (void)
|
|
{
|
|
dissector_handle_t ipfc_handle;
|
|
capture_dissector_handle_t ipfc_cap_handle;
|
|
|
|
ipfc_handle = create_dissector_handle (dissect_ipfc, proto_ipfc);
|
|
dissector_add_uint("wtap_encap", WTAP_ENCAP_IP_OVER_FC, ipfc_handle);
|
|
|
|
llc_handle = find_dissector_add_dependency("llc", proto_ipfc);
|
|
|
|
ipfc_cap_handle = create_capture_dissector_handle(capture_ipfc, proto_ipfc);
|
|
capture_dissector_add_uint("wtap_encap", WTAP_ENCAP_IP_OVER_FC, ipfc_cap_handle);
|
|
|
|
llc_cap_handle = find_capture_dissector("llc");
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|