forked from osmocom/wireshark
2eb7b05b8c
Similar to the "tcp.port" changes in I99604f95d426ad345f4b494598d94178b886eb67, convert dissectors that use "udp.port". More cleanup done on dissectors that use both TCP and UDP dissector tables, so that less preference callbacks exist. Change-Id: If07be9b9e850c244336a7069599cd554ce312dd3 Reviewed-on: https://code.wireshark.org/review/18120 Petri-Dish: Michael Mann <mmann78@netscape.net> Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org> Reviewed-by: Michael Mann <mmann78@netscape.net>
127 lines
4.2 KiB
C
127 lines
4.2 KiB
C
/*
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* Copyright (c) 2003 Markus Friedl. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include <epan/packet.h>
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void proto_register_udpencap(void);
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void proto_reg_handoff_udpencap(void);
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#define UDPENCAP_PORT 4500
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static int proto_udpencap = -1;
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static int hf_nat_keepalive = -1;
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static int hf_non_esp_marker = -1;
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static gint ett_udpencap = -1;
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static dissector_handle_t esp_handle;
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static dissector_handle_t isakmp_handle;
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/*
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* UDP Encapsulation of IPsec Packets
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* draft-ietf-ipsec-udp-encaps-06.txt
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*/
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static int
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dissect_udpencap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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tvbuff_t *next_tvb;
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proto_tree *udpencap_tree;
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proto_item *ti;
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guint32 spi;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "UDPENCAP");
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col_clear(pinfo->cinfo, COL_INFO);
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ti = proto_tree_add_item(tree, proto_udpencap, tvb, 0, -1, ENC_NA);
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udpencap_tree = proto_item_add_subtree(ti, ett_udpencap);
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/* 1 byte of 0xFF indicates NAT-keepalive */
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if ((tvb_captured_length(tvb) == 1) && (tvb_get_guint8(tvb, 0) == 0xff)) {
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col_set_str(pinfo->cinfo, COL_INFO, "NAT-keepalive");
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proto_tree_add_item(udpencap_tree, hf_nat_keepalive, tvb, 0, 1, ENC_NA);
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} else {
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/* SPI of zero indicates IKE traffic, otherwise it's ESP */
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spi = tvb_get_ntohl(tvb, 0);
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if (spi == 0) {
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col_set_str(pinfo->cinfo, COL_INFO, "ISAKMP");
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proto_tree_add_item(udpencap_tree, hf_non_esp_marker, tvb, 0, 4, ENC_NA);
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proto_item_set_len(ti, 4);
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next_tvb = tvb_new_subset_remaining(tvb, 4);
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call_dissector(isakmp_handle, next_tvb, pinfo, tree);
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} else {
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col_set_str(pinfo->cinfo, COL_INFO, "ESP");
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proto_item_set_len(ti, 0);
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call_dissector(esp_handle, tvb, pinfo, tree);
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}
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}
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return tvb_captured_length(tvb);
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}
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void
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proto_register_udpencap(void)
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{
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static hf_register_info hf[] = {
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{ &hf_nat_keepalive, { "NAT-keepalive packet", "udpencap.nat_keepalive",
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FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }},
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{ &hf_non_esp_marker, { "Non-ESP Marker", "udpencap.non_esp_marker",
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FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }},
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};
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static gint *ett[] = {
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&ett_udpencap,
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};
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proto_udpencap = proto_register_protocol("UDP Encapsulation of IPsec Packets", "UDPENCAP", "udpencap");
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proto_register_field_array(proto_udpencap, 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_udpencap(void)
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{
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dissector_handle_t udpencap_handle;
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esp_handle = find_dissector_add_dependency("esp", proto_udpencap);
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isakmp_handle = find_dissector_add_dependency("isakmp", proto_udpencap);
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udpencap_handle = create_dissector_handle(dissect_udpencap, proto_udpencap);
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dissector_add_uint_with_preference("udp.port", UDPENCAP_PORT, udpencap_handle);
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}
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local Variables:
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* c-basic-offset: 2
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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=2 tabstop=8 expandtab:
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* :indentSize=2:tabSize=8:noTabs=true:
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*/
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