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/* packet-swipe.c
* swIPe IP Security Protocol
*
* http://www.crypto.com/papers/swipe.id.txt
*
* Copyright 2014 by Michael Mann
*
* 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/ipproto.h>
void proto_register_swipe(void);
void proto_reg_handoff_swipe(void);
/* Routing Header Types */
static const value_string swipe_packet_type_vals[] = {
{ 0, "Plain encapsulation" },
{ 1, "Packet is authenticated but not encrypted" },
{ 2, "Packet is encrypted" },
{ 3, "Packet is both authenticated and encrypted" },
{ 0, NULL }
};
/* Initialize the protocol and registered fields */
static int proto_swipe = -1;
static int hf_swipe_packet_type = -1;
static int hf_swipe_len = -1;
static int hf_swipe_policy_id = -1;
static int hf_swipe_packet_seq = -1;
static int hf_swipe_authenticator = -1;
/* Initialize the subtree pointers */
static gint ett_swipe = -1;
static dissector_handle_t ipv6_handle;
static int
dissect_swipe(tvbuff_t *tvb, packet_info * pinfo, proto_tree *tree, void* data _U_)
{
int header_len, offset = 0;
proto_tree *swipe_tree;
proto_item *ti;
tvbuff_t *next_tvb;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "swIPe");
col_clear(pinfo->cinfo, COL_INFO);
header_len = tvb_get_guint8(tvb, offset + 1);
if (tree)
{
ti = proto_tree_add_item(tree, proto_swipe, tvb, offset, header_len, ENC_NA);
swipe_tree = proto_item_add_subtree(ti, ett_swipe);
/* Packet Type */
proto_tree_add_item(swipe_tree, hf_swipe_packet_type, tvb, offset, 1, ENC_BIG_ENDIAN);
/* Header Length */
proto_tree_add_item(swipe_tree, hf_swipe_len, tvb, offset + 1, 1, ENC_BIG_ENDIAN);
/* Policy ID */
proto_tree_add_item(swipe_tree, hf_swipe_policy_id, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
/* Packet Sequence Number */
proto_tree_add_item(swipe_tree, hf_swipe_packet_seq, tvb, offset + 4, 4, ENC_BIG_ENDIAN);
if (header_len > 8)
proto_tree_add_item(swipe_tree, hf_swipe_authenticator, tvb, offset + 8, header_len - 8, ENC_NA);
}
next_tvb = tvb_new_subset_remaining(tvb, header_len);
call_dissector(ipv6_handle, next_tvb, pinfo, tree);
return tvb_captured_length(tvb);
}
/* Register the protocol with Wireshark */
void
proto_register_swipe(void)
{
/* Setup list of header fields */
static hf_register_info hf[] = {
{ &hf_swipe_packet_type, { "Packet type", "swipe.packet_type", FT_UINT8, BASE_DEC, VALS(swipe_packet_type_vals), 0x0, NULL, HFILL } },
{ &hf_swipe_len, { "Header Length", "swipe.len", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_swipe_policy_id, { "Policy identifier", "swipe.policy_id", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_swipe_packet_seq, { "Packet sequence number", "swipe.packet_seq", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_swipe_authenticator, { "Authenticator", "swipe.authenticator", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_swipe
};
/* Register the protocol name and description */
proto_swipe = proto_register_protocol("swIPe IP Security Protocol", "swIPe", "swipe");
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array(proto_swipe, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_swipe(void)
{
dissector_handle_t swipe_handle;
swipe_handle = create_dissector_handle(dissect_swipe, proto_swipe );
dissector_add_uint("ip.proto", IP_PROTO_SWIPE, swipe_handle);
ipv6_handle = find_dissector_add_dependency("ipv6", proto_swipe );
}
/*
* Editor modelines
*
* Local Variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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