153 lines
4.0 KiB
C
153 lines
4.0 KiB
C
/*
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* Copyright (C) 2010 Tobias Brunner
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* Hochschule fuer Technik Rapperswil
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* Copyright (C) 2002-2003 Mathieu Lafon
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* Arkoon Network Security
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#ifndef _NAT_TRAVERSAL_H
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#define _NAT_TRAVERSAL_H
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#include "packet.h"
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#define NAT_TRAVERSAL_IETF_00_01 1
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#define NAT_TRAVERSAL_IETF_02_03 2
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#define NAT_TRAVERSAL_RFC 3
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#define NAT_TRAVERSAL_NAT_BHND_ME 30
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#define NAT_TRAVERSAL_NAT_BHND_PEER 31
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#define NAT_TRAVERSAL_METHOD (0xffffffff - LELEM(30) - LELEM(31))
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/**
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* NAT-Traversal methods which need NAT-D
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*/
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#define NAT_T_WITH_NATD \
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( LELEM(NAT_TRAVERSAL_IETF_00_01) | LELEM(NAT_TRAVERSAL_IETF_02_03) | \
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LELEM(NAT_TRAVERSAL_RFC) )
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/**
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* NAT-Traversal methods which need NAT-OA
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*/
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#define NAT_T_WITH_NATOA \
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( LELEM(NAT_TRAVERSAL_IETF_00_01) | LELEM(NAT_TRAVERSAL_IETF_02_03) | \
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LELEM(NAT_TRAVERSAL_RFC) )
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/**
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* NAT-Traversal methods which use NAT-KeepAlive
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*/
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#define NAT_T_WITH_KA \
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( LELEM(NAT_TRAVERSAL_IETF_00_01) | LELEM(NAT_TRAVERSAL_IETF_02_03) | \
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LELEM(NAT_TRAVERSAL_RFC) )
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/**
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* NAT-Traversal methods which use floating port
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*/
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#define NAT_T_WITH_PORT_FLOATING \
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( LELEM(NAT_TRAVERSAL_IETF_02_03) | LELEM(NAT_TRAVERSAL_RFC) )
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/**
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* NAT-Traversal methods which use officials values (RFC)
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*/
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#define NAT_T_WITH_RFC_VALUES \
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( LELEM(NAT_TRAVERSAL_RFC) )
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/**
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* NAT-Traversal detected
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*/
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#define NAT_T_DETECTED \
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( LELEM(NAT_TRAVERSAL_NAT_BHND_ME) | LELEM(NAT_TRAVERSAL_NAT_BHND_PEER) )
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/**
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* NAT-T Port Floating
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*/
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#define NAT_T_IKE_FLOAT_PORT 4500
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void init_nat_traversal (bool activate, unsigned int keep_alive_period,
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bool fka, bool spf);
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extern bool nat_traversal_enabled;
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extern bool nat_traversal_support_non_ike;
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extern bool nat_traversal_support_port_floating;
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/**
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* NAT-D
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*/
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void nat_traversal_natd_lookup(struct msg_digest *md);
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#ifndef PB_STREAM_UNDEFINED
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bool nat_traversal_add_natd(u_int8_t np, pb_stream *outs,
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struct msg_digest *md);
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#endif
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/**
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* NAT-OA
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*/
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void nat_traversal_natoa_lookup(struct msg_digest *md);
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#ifndef PB_STREAM_UNDEFINED
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bool nat_traversal_add_natoa(u_int8_t np, pb_stream *outs,
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struct state *st);
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#endif
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/**
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* NAT-keep_alive
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*/
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void nat_traversal_new_ka_event (void);
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void nat_traversal_ka_event (void);
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void nat_traversal_show_result (u_int32_t nt, u_int16_t sport);
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int nat_traversal_espinudp_socket (int sk, u_int32_t type);
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/**
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* Vendor ID
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*/
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#ifndef PB_STREAM_UNDEFINED
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bool nat_traversal_add_vid(u_int8_t np, pb_stream *outs);
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#endif
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u_int32_t nat_traversal_vid_to_method(unsigned short nat_t_vid);
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void nat_traversal_change_port_lookup(struct msg_digest *md, struct state *st);
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/**
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* New NAT mapping
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*/
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void process_nat_t_new_mapping(u_int32_t reqid, u_int32_t spi,
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ip_address *new_end);
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/**
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* IKE port floating
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*/
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bool
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nat_traversal_port_float(struct state *st, struct msg_digest *md, bool in);
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/**
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* Encapsulation mode macro (see demux.c)
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*/
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#define NAT_T_ENCAPSULATION_MODE(st,nat_t_policy) ( \
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((st)->nat_traversal & NAT_T_DETECTED) \
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? ( ((nat_t_policy) & POLICY_TUNNEL) \
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? ( ((st)->nat_traversal & NAT_T_WITH_RFC_VALUES) \
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? (ENCAPSULATION_MODE_UDP_TUNNEL_RFC) \
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: (ENCAPSULATION_MODE_UDP_TUNNEL_DRAFTS) \
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) \
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: ( ((st)->nat_traversal & NAT_T_WITH_RFC_VALUES) \
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? (ENCAPSULATION_MODE_UDP_TRANSPORT_RFC) \
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: (ENCAPSULATION_MODE_UDP_TRANSPORT_DRAFTS) \
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) \
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) \
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: ( ((st)->st_policy & POLICY_TUNNEL) \
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? (ENCAPSULATION_MODE_TUNNEL) \
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: (ENCAPSULATION_MODE_TRANSPORT) \
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) \
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)
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#endif /* _NAT_TRAVERSAL_H */
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