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/* packet-ap1394.c
* Routines for Apple IP-over-IEEE 1394 packet disassembly
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/capture_dissectors.h>
#include <wsutil/pint.h>
#include <epan/addr_resolv.h>
#include <epan/etypes.h>
void proto_register_ap1394(void);
void proto_reg_handoff_ap1394(void);
static int proto_ap1394 = -1;
static int hf_ap1394_dst = -1;
static int hf_ap1394_src = -1;
static int hf_ap1394_type = -1;
static gint ett_ap1394 = -1;
static dissector_table_t ethertype_subdissector_table;
static gboolean
capture_ap1394(const guchar *pd, int offset, int len, capture_packet_info_t *cpinfo, const union wtap_pseudo_header *pseudo_header)
{
guint16 etype;
if (!BYTES_ARE_IN_FRAME(offset, len, 18)) {
return FALSE;
}
/* Skip destination and source addresses */
offset += 16;
etype = pntoh16(&pd[offset]);
offset += 2;
return try_capture_dissector("ethertype", etype, pd, offset, len, cpinfo, pseudo_header);
}
static int
dissect_ap1394(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_item *ti;
proto_tree *fh_tree = NULL;
guint16 etype;
tvbuff_t *next_tvb;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "IP/IEEE1394");
col_clear(pinfo->cinfo, COL_INFO);
set_address_tvb(&pinfo->dl_src, AT_EUI64, 8, tvb, 8);
copy_address_shallow(&pinfo->src, &pinfo->dl_src);
set_address_tvb(&pinfo->dl_dst, AT_EUI64, 8, tvb, 0);
copy_address_shallow(&pinfo->dst, &pinfo->dl_dst);
if (tree) {
ti = proto_tree_add_protocol_format(tree, proto_ap1394, tvb, 0, 18,
"Apple IP-over-IEEE 1394, Src: %s, Dst: %s",
address_to_str(wmem_packet_scope(), &pinfo->src), address_to_str(wmem_packet_scope(), &pinfo->dst));
fh_tree = proto_item_add_subtree(ti, ett_ap1394);
proto_tree_add_item(fh_tree, hf_ap1394_dst, tvb, 0, 8, ENC_NA);
proto_tree_add_item(fh_tree, hf_ap1394_src, tvb, 8, 8, ENC_NA);
}
etype = tvb_get_ntohs(tvb, 16);
proto_tree_add_uint(fh_tree, hf_ap1394_type, tvb, 16, 2, etype);
next_tvb = tvb_new_subset_remaining(tvb, 18);
if (!dissector_try_uint(ethertype_subdissector_table, etype, next_tvb,
pinfo, tree))
{
call_data_dissector(next_tvb, pinfo, tree);
}
return tvb_captured_length(tvb);
}
void
proto_register_ap1394(void)
{
static hf_register_info hf[] = {
{ &hf_ap1394_dst,
{ "Destination", "ap1394.dst", FT_BYTES, BASE_NONE,
NULL, 0x0, "Destination address", HFILL }},
{ &hf_ap1394_src,
{ "Source", "ap1394.src", FT_BYTES, BASE_NONE,
NULL, 0x0, "Source address", HFILL }},
/* registered here but handled in ethertype.c */
{ &hf_ap1394_type,
{ "Type", "ap1394.type", FT_UINT16, BASE_HEX,
VALS(etype_vals), 0x0, NULL, HFILL }},
};
static gint *ett[] = {
&ett_ap1394,
};
proto_ap1394 = proto_register_protocol("Apple IP-over-IEEE 1394", "IP/IEEE1394", "ap1394");
proto_register_field_array(proto_ap1394, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_ap1394(void)
{
dissector_handle_t ap1394_handle;
capture_dissector_handle_t ap1394_cap_handle;
ethertype_subdissector_table = find_dissector_table("ethertype");
ap1394_handle = create_dissector_handle(dissect_ap1394, proto_ap1394);
dissector_add_uint("wtap_encap", WTAP_ENCAP_APPLE_IP_OVER_IEEE1394, ap1394_handle);
ap1394_cap_handle = create_capture_dissector_handle(capture_ap1394, proto_ap1394);
capture_dissector_add_uint("wtap_encap", WTAP_ENCAP_APPLE_IP_OVER_IEEE1394, ap1394_cap_handle);
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local Variables:
* c-basic-offset: 2
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=2 tabstop=8 expandtab:
* :indentSize=2:tabSize=8:noTabs=true:
*/
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