1 files changed, 0 insertions, 448 deletions

diff --git a/src/libcharon/sa/tasks/ike_natd.c b/src/libcharon/sa/tasks/ike_natd.c
deleted file mode 100644
index f06a518fa..000000000
--- a/src/libcharon/sa/tasks/ike_natd.c
+++ /dev/null
@@ -1,448 +0,0 @@
-/*
- * Copyright (C) 2006-2007 Martin Willi
- * Copyright (C) 2006 Tobias Brunner, Daniel Roethlisberger
- * Hochschule fuer Technik Rapperswil
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * for more details.
- */
-
-#include "ike_natd.h"
-
-#include <string.h>
-
-#include <hydra.h>
-#include <daemon.h>
-#include <config/peer_cfg.h>
-#include <crypto/hashers/hasher.h>
-#include <encoding/payloads/notify_payload.h>
-
-
-typedef struct private_ike_natd_t private_ike_natd_t;
-
-/**
- * Private members of a ike_natd_t task.
- */
-struct private_ike_natd_t {
-
-	/**
-	 * Public methods and task_t interface.
-	 */
-	ike_natd_t public;
-
-	/**
-	 * Assigned IKE_SA.
-	 */
-	ike_sa_t *ike_sa;
-
-	/**
-	 * Are we the initiator?
-	 */
-	bool initiator;
-
-	/**
-	 * Hasher used to build NAT detection hashes
-	 */
-	hasher_t *hasher;
-
-	/**
-	 * Did we process any NAT detection notifys for a source address?
-	 */
-	bool src_seen;
-
-	/**
-	 * Did we process any NAT detection notifys for a destination address?
-	 */
-	bool dst_seen;
-
-	/**
-	 * Have we found a matching source address NAT hash?
-	 */
-	bool src_matched;
-
-	/**
-	 * Have we found a matching destination address NAT hash?
-	 */
-	bool dst_matched;
-
-	/**
-	 * whether NAT mappings for our NATed address has changed
-	 */
-	bool mapping_changed;
-};
-
-
-/**
- * Build NAT detection hash for a host
- */
-static chunk_t generate_natd_hash(private_ike_natd_t *this,
-								  ike_sa_id_t *ike_sa_id, host_t *host)
-{
-	chunk_t natd_chunk, spi_i_chunk, spi_r_chunk, addr_chunk, port_chunk;
-	chunk_t natd_hash;
-	u_int64_t spi_i, spi_r;
-	u_int16_t port;
-
-	/* prepare all required chunks */
-	spi_i = ike_sa_id->get_initiator_spi(ike_sa_id);
-	spi_r = ike_sa_id->get_responder_spi(ike_sa_id);
-	spi_i_chunk.ptr = (void*)&spi_i;
-	spi_i_chunk.len = sizeof(spi_i);
-	spi_r_chunk.ptr = (void*)&spi_r;
-	spi_r_chunk.len = sizeof(spi_r);
-	port = htons(host->get_port(host));
-	port_chunk.ptr = (void*)&port;
-	port_chunk.len = sizeof(port);
-	addr_chunk = host->get_address(host);
-
-	/*  natd_hash = SHA1( spi_i | spi_r | address | port ) */
-	natd_chunk = chunk_cat("cccc", spi_i_chunk, spi_r_chunk, addr_chunk, port_chunk);
-	this->hasher->allocate_hash(this->hasher, natd_chunk, &natd_hash);
-	DBG3(DBG_IKE, "natd_chunk %B", &natd_chunk);
-	DBG3(DBG_IKE, "natd_hash %B", &natd_hash);
-
-	chunk_free(&natd_chunk);
-	return natd_hash;
-}
-
-/**
- * build a faked NATD payload to enforce UDP encap
- */
-static chunk_t generate_natd_hash_faked(private_ike_natd_t *this)
-{
-	rng_t *rng;
-	chunk_t chunk;
-
-	rng = lib->crypto->create_rng(lib->crypto, RNG_WEAK);
-	if (!rng)
-	{
-		DBG1(DBG_IKE, "unable to get random bytes for NATD fake");
-		return chunk_empty;
-	}
-	rng->allocate_bytes(rng, HASH_SIZE_SHA1, &chunk);
-	rng->destroy(rng);
-	return chunk;
-}
-
-/**
- * Build a NAT detection notify payload.
- */
-static notify_payload_t *build_natd_payload(private_ike_natd_t *this,
-											notify_type_t type, host_t *host)
-{
-	chunk_t hash;
-	notify_payload_t *notify;
-	ike_sa_id_t *ike_sa_id;
-	ike_cfg_t *config;
-
-	ike_sa_id = this->ike_sa->get_id(this->ike_sa);
-	config = this->ike_sa->get_ike_cfg(this->ike_sa);
-	if (config->force_encap(config) && type == NAT_DETECTION_SOURCE_IP)
-	{
-		hash = generate_natd_hash_faked(this);
-	}
-	else
-	{
-		hash = generate_natd_hash(this, ike_sa_id, host);
-	}
-	notify = notify_payload_create();
-	notify->set_notify_type(notify, type);
-	notify->set_notification_data(notify, hash);
-	chunk_free(&hash);
-
-	return notify;
-}
-
-/**
- * read notifys from message and evaluate them
- */
-static void process_payloads(private_ike_natd_t *this, message_t *message)
-{
-	enumerator_t *enumerator;
-	payload_t *payload;
-	notify_payload_t *notify;
-	chunk_t hash, src_hash, dst_hash;
-	ike_sa_id_t *ike_sa_id;
-	host_t *me, *other;
-	ike_cfg_t *config;
-
-	/* Precompute NAT-D hashes for incoming NAT notify comparison */
-	ike_sa_id = message->get_ike_sa_id(message);
-	me = message->get_destination(message);
-	other = message->get_source(message);
-	dst_hash = generate_natd_hash(this, ike_sa_id, me);
-	src_hash = generate_natd_hash(this, ike_sa_id, other);
-
-	DBG3(DBG_IKE, "precalculated src_hash %B", &src_hash);
-	DBG3(DBG_IKE, "precalculated dst_hash %B", &dst_hash);
-
-	enumerator = message->create_payload_enumerator(message);
-	while (enumerator->enumerate(enumerator, &payload))
-	{
-		if (payload->get_type(payload) != NOTIFY)
-		{
-			continue;
-		}
-		notify = (notify_payload_t*)payload;
-		switch (notify->get_notify_type(notify))
-		{
-			case NAT_DETECTION_DESTINATION_IP:
-			{
-				this->dst_seen = TRUE;
-				hash = notify->get_notification_data(notify);
-				if (!this->dst_matched)
-				{
-					DBG3(DBG_IKE, "received dst_hash %B", &hash);
-					if (chunk_equals(hash, dst_hash))
-					{
-						this->dst_matched = TRUE;
-					}
-				}
-				/* RFC4555 says we should also compare against IKE_SA_INIT
-				 * NATD payloads, but this does not work: We are running
-				 * there at port 500, but use 4500 afterwards... */
-				if (message->get_exchange_type(message) == INFORMATIONAL &&
-					this->initiator && !this->dst_matched)
-				{
-					this->mapping_changed = this->ike_sa->has_mapping_changed(
-															this->ike_sa, hash);
-				}
-				break;
-			}
-			case NAT_DETECTION_SOURCE_IP:
-			{
-				this->src_seen = TRUE;
-				if (!this->src_matched)
-				{
-					hash = notify->get_notification_data(notify);
-					DBG3(DBG_IKE, "received src_hash %B", &hash);
-					if (chunk_equals(hash, src_hash))
-					{
-						this->src_matched = TRUE;
-					}
-				}
-				break;
-			}
-			default:
-				break;
-		}
-	}
-	enumerator->destroy(enumerator);
-
-	chunk_free(&src_hash);
-	chunk_free(&dst_hash);
-
-	if (this->src_seen && this->dst_seen)
-	{
-		this->ike_sa->enable_extension(this->ike_sa, EXT_NATT);
-
-		this->ike_sa->set_condition(this->ike_sa, COND_NAT_HERE,
-									!this->dst_matched);
-		this->ike_sa->set_condition(this->ike_sa, COND_NAT_THERE,
-									!this->src_matched);
-		config = this->ike_sa->get_ike_cfg(this->ike_sa);
-		if (this->dst_matched && this->src_matched &&
-			config->force_encap(config))
-		{
-			this->ike_sa->set_condition(this->ike_sa, COND_NAT_FAKE, TRUE);
-		}
-	}
-}
-
-METHOD(task_t, process_i, status_t,
-	private_ike_natd_t *this, message_t *message)
-{
-	process_payloads(this, message);
-
-	if (message->get_exchange_type(message) == IKE_SA_INIT)
-	{
-		peer_cfg_t *peer_cfg = this->ike_sa->get_peer_cfg(this->ike_sa);
-		if (this->ike_sa->has_condition(this->ike_sa, COND_NAT_ANY) ||
-			/* if peer supports NAT-T, we switch to port 4500 even
-			 * if no NAT is detected. can't be done later (when we would know
-			 * whether the peer supports MOBIKE) because there would be no
-			 * exchange to actually do the switch (other than a forced DPD). */
-			(peer_cfg->use_mobike(peer_cfg) &&
-			 this->ike_sa->supports_extension(this->ike_sa, EXT_NATT)))
-		{
-			this->ike_sa->float_ports(this->ike_sa);
-		}
-	}
-
-	return SUCCESS;
-}
-
-METHOD(task_t, build_i, status_t,
-	private_ike_natd_t *this, message_t *message)
-{
-	notify_payload_t *notify;
-	enumerator_t *enumerator;
-	ike_cfg_t *ike_cfg;
-	host_t *host;
-
-	if (this->hasher == NULL)
-	{
-		DBG1(DBG_IKE, "unable to build NATD payloads, SHA1 not supported");
-		return NEED_MORE;
-	}
-
-	ike_cfg = this->ike_sa->get_ike_cfg(this->ike_sa);
-
-	/* destination is always set */
-	host = message->get_destination(message);
-	notify = build_natd_payload(this, NAT_DETECTION_DESTINATION_IP, host);
-	message->add_payload(message, (payload_t*)notify);
-
-	/* source may be any, we have 3 possibilities to get our source address:
-	 * 1. It is defined in the config => use the one of the IKE_SA
-	 * 2. We do a routing lookup in the kernel interface
-	 * 3. Include all possbile addresses
-	 */
-	host = message->get_source(message);
-	if (!host->is_anyaddr(host))
-	{	/* 1. */
-		notify = build_natd_payload(this, NAT_DETECTION_SOURCE_IP, host);
-		message->add_payload(message, (payload_t*)notify);
-	}
-	else
-	{
-		host = hydra->kernel_interface->get_source_addr(hydra->kernel_interface,
-							this->ike_sa->get_other_host(this->ike_sa), NULL);
-		if (host)
-		{	/* 2. */
-			host->set_port(host, ike_cfg->get_my_port(ike_cfg));
-			notify = build_natd_payload(this, NAT_DETECTION_SOURCE_IP, host);
-			message->add_payload(message, (payload_t*)notify);
-			host->destroy(host);
-		}
-		else
-		{	/* 3. */
-			enumerator = hydra->kernel_interface->create_address_enumerator(
-										hydra->kernel_interface, FALSE, FALSE);
-			while (enumerator->enumerate(enumerator, (void**)&host))
-			{
-				/* apply port 500 to host, but work on a copy */
-				host = host->clone(host);
-				host->set_port(host, ike_cfg->get_my_port(ike_cfg));
-				notify = build_natd_payload(this, NAT_DETECTION_SOURCE_IP, host);
-				host->destroy(host);
-				message->add_payload(message, (payload_t*)notify);
-			}
-			enumerator->destroy(enumerator);
-		}
-	}
-	return NEED_MORE;
-}
-
-METHOD(task_t, build_r, status_t,
-	private_ike_natd_t *this, message_t *message)
-{
-	notify_payload_t *notify;
-	host_t *me, *other;
-
-	/* only add notifies on successful responses. */
-	if (message->get_exchange_type(message) == IKE_SA_INIT &&
-		message->get_payload(message, SECURITY_ASSOCIATION) == NULL)
-	{
-		return SUCCESS;
-	}
-
-	if (this->src_seen && this->dst_seen)
-	{
-		if (this->hasher == NULL)
-		{
-			DBG1(DBG_IKE, "unable to build NATD payloads, SHA1 not supported");
-			return SUCCESS;
-		}
-
-		/* initiator seems to support NAT detection, add response */
-		me = message->get_source(message);
-		notify = build_natd_payload(this, NAT_DETECTION_SOURCE_IP, me);
-		message->add_payload(message, (payload_t*)notify);
-
-		other = message->get_destination(message);
-		notify = build_natd_payload(this, NAT_DETECTION_DESTINATION_IP, other);
-		message->add_payload(message, (payload_t*)notify);
-	}
-	return SUCCESS;
-}
-
-METHOD(task_t, process_r, status_t,
-	private_ike_natd_t *this, message_t *message)
-{
-	process_payloads(this, message);
-
-	return NEED_MORE;
-}
-
-METHOD(task_t, get_type, task_type_t,
-	private_ike_natd_t *this)
-{
-	return IKE_NATD;
-}
-
-METHOD(task_t, migrate, void,
-	private_ike_natd_t *this, ike_sa_t *ike_sa)
-{
-	this->ike_sa = ike_sa;
-	this->src_seen = FALSE;
-	this->dst_seen = FALSE;
-	this->src_matched = FALSE;
-	this->dst_matched = FALSE;
-	this->mapping_changed = FALSE;
-}
-
-METHOD(task_t, destroy, void,
-	private_ike_natd_t *this)
-{
-	DESTROY_IF(this->hasher);
-	free(this);
-}
-
-METHOD(ike_natd_t, has_mapping_changed, bool,
-	private_ike_natd_t *this)
-{
-	return this->mapping_changed;
-}
-
-/*
- * Described in header.
- */
-ike_natd_t *ike_natd_create(ike_sa_t *ike_sa, bool initiator)
-{
-	private_ike_natd_t *this;
-
-	INIT(this,
-		.public = {
-			.task = {
-				.get_type = _get_type,
-				.migrate = _migrate,
-				.destroy = _destroy,
-			},
-			.has_mapping_changed = _has_mapping_changed,
-		},
-		.ike_sa = ike_sa,
-		.initiator = initiator,
-		.hasher = lib->crypto->create_hasher(lib->crypto, HASH_SHA1),
-	);
-
-	if (initiator)
-	{
-		this->public.task.build = _build_i;
-		this->public.task.process = _process_i;
-	}
-	else
-	{
-		this->public.task.build = _build_r;
-		this->public.task.process = _process_r;
-	}
-
-	return &this->public;
-}