135 lines
4.3 KiB
C
135 lines
4.3 KiB
C
/* packet-swipe.c
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* swIPe IP Security Protocol
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*
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* http://www.crypto.com/papers/swipe.id.txt
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*
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* Copyright 2014 by Michael Mann
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/ipproto.h>
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void proto_register_swipe(void);
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void proto_reg_handoff_swipe(void);
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/* Routing Header Types */
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static const value_string swipe_packet_type_vals[] = {
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{ 0, "Plain encapsulation" },
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{ 1, "Packet is authenticated but not encrypted" },
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{ 2, "Packet is encrypted" },
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{ 3, "Packet is both authenticated and encrypted" },
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{ 0, NULL }
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};
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/* Initialize the protocol and registered fields */
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static int proto_swipe = -1;
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static int hf_swipe_packet_type = -1;
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static int hf_swipe_len = -1;
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static int hf_swipe_policy_id = -1;
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static int hf_swipe_packet_seq = -1;
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static int hf_swipe_authenticator = -1;
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/* Initialize the subtree pointers */
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static gint ett_swipe = -1;
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static dissector_handle_t ipv6_handle;
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static int
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dissect_swipe(tvbuff_t *tvb, packet_info * pinfo, proto_tree *tree, void* data _U_)
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{
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int header_len, offset = 0;
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proto_tree *swipe_tree;
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proto_item *ti;
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tvbuff_t *next_tvb;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "swIPe");
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col_clear(pinfo->cinfo, COL_INFO);
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header_len = tvb_get_guint8(tvb, offset + 1);
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if (tree)
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{
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ti = proto_tree_add_item(tree, proto_swipe, tvb, offset, header_len, ENC_NA);
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swipe_tree = proto_item_add_subtree(ti, ett_swipe);
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/* Packet Type */
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proto_tree_add_item(swipe_tree, hf_swipe_packet_type, tvb, offset, 1, ENC_BIG_ENDIAN);
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/* Header Length */
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proto_tree_add_item(swipe_tree, hf_swipe_len, tvb, offset + 1, 1, ENC_BIG_ENDIAN);
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/* Policy ID */
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proto_tree_add_item(swipe_tree, hf_swipe_policy_id, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
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/* Packet Sequence Number */
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proto_tree_add_item(swipe_tree, hf_swipe_packet_seq, tvb, offset + 4, 4, ENC_BIG_ENDIAN);
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if (header_len > 8)
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proto_tree_add_item(swipe_tree, hf_swipe_authenticator, tvb, offset + 8, header_len - 8, ENC_NA);
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}
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next_tvb = tvb_new_subset_remaining(tvb, header_len);
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call_dissector(ipv6_handle, next_tvb, pinfo, tree);
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return tvb_captured_length(tvb);
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}
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/* Register the protocol with Wireshark */
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void
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proto_register_swipe(void)
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{
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/* Setup list of header fields */
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static hf_register_info hf[] = {
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{ &hf_swipe_packet_type, { "Packet type", "swipe.packet_type", FT_UINT8, BASE_DEC, VALS(swipe_packet_type_vals), 0x0, NULL, HFILL } },
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{ &hf_swipe_len, { "Header Length", "swipe.len", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },
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{ &hf_swipe_policy_id, { "Policy identifier", "swipe.policy_id", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
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{ &hf_swipe_packet_seq, { "Packet sequence number", "swipe.packet_seq", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
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{ &hf_swipe_authenticator, { "Authenticator", "swipe.authenticator", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, 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_swipe
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};
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/* Register the protocol name and description */
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proto_swipe = proto_register_protocol("swIPe IP Security Protocol", "swIPe", "swipe");
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/* Required function calls to register the header fields and subtrees used */
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proto_register_field_array(proto_swipe, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void
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proto_reg_handoff_swipe(void)
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{
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dissector_handle_t swipe_handle;
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swipe_handle = create_dissector_handle(dissect_swipe, proto_swipe );
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dissector_add_uint("ip.proto", IP_PROTO_SWIPE, swipe_handle);
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ipv6_handle = find_dissector_add_dependency("ipv6", proto_swipe );
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}
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/*
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* Editor modelines
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*
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* Local Variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* ex: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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