Clear peer addresses during HA update.

[thirdparty/strongswan.git] / src / libcharon / plugins / ha / ha_dispatcher.c

/*
 * Copyright (C) 2008 Martin Willi
 * 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 "ha_dispatcher.h"

#include <daemon.h>
#include <processing/jobs/callback_job.h>

typedef struct private_ha_dispatcher_t private_ha_dispatcher_t;

/**
 * Private data of an ha_dispatcher_t object.
 */
struct private_ha_dispatcher_t {

	/**
	 * Public ha_dispatcher_t interface.
	 */
	ha_dispatcher_t public;

	/**
	 * socket to pull messages from
	 */
	ha_socket_t *socket;

	/**
	 * segments to control
	 */
	ha_segments_t *segments;

	/**
	 * Cache for resync
	 */
	ha_cache_t *cache;

	/**
	 * Kernel helper
	 */
	ha_kernel_t *kernel;

	/**
	 * HA enabled pool
	 */
	ha_attribute_t *attr;

	/**
	 * Dispatcher job
	 */
	callback_job_t *job;
};

/**
 * Quick and dirty hack implementation of diffie_hellman_t.get_shared_secret
 */
static status_t get_shared_secret(diffie_hellman_t *this, chunk_t *secret)
{
	*secret = chunk_clone((*(chunk_t*)this->destroy));
	return SUCCESS;
}

/**
 * Process messages of type IKE_ADD
 */
static void process_ike_add(private_ha_dispatcher_t *this, ha_message_t *message)
{
	ha_message_attribute_t attribute;
	ha_message_value_t value;
	enumerator_t *enumerator;
	ike_sa_t *ike_sa = NULL, *old_sa = NULL;
	u_int16_t encr = 0, len = 0, integ = 0, prf = 0, old_prf = PRF_UNDEFINED;
	chunk_t nonce_i = chunk_empty, nonce_r = chunk_empty;
	chunk_t secret = chunk_empty, old_skd = chunk_empty;

	enumerator = message->create_attribute_enumerator(message);
	while (enumerator->enumerate(enumerator, &attribute, &value))
	{
		switch (attribute)
		{
			case HA_IKE_ID:
				ike_sa = ike_sa_create(value.ike_sa_id);
				break;
			case HA_IKE_REKEY_ID:
				old_sa = charon->ike_sa_manager->checkout(charon->ike_sa_manager,
														  value.ike_sa_id);
				break;
			case HA_NONCE_I:
				nonce_i = value.chunk;
				break;
			case HA_NONCE_R:
				nonce_r = value.chunk;
				break;
			case HA_SECRET:
				secret = value.chunk;
				break;
			case HA_OLD_SKD:
				old_skd = value.chunk;
				break;
			case HA_ALG_ENCR:
				encr = value.u16;
				break;
			case HA_ALG_ENCR_LEN:
				len = value.u16;
				break;
			case HA_ALG_INTEG:
				integ = value.u16;
				break;
			case HA_ALG_PRF:
				prf = value.u16;
				break;
			case HA_ALG_OLD_PRF:
				old_prf = value.u16;
				break;
			default:
				break;
		}
	}
	enumerator->destroy(enumerator);

	if (ike_sa)
	{
		proposal_t *proposal;
		keymat_t *keymat;
		/* quick and dirty hack of a DH implementation ;-) */
		diffie_hellman_t dh = { .get_shared_secret = get_shared_secret,
								.destroy = (void*)&secret };

		proposal = proposal_create(PROTO_IKE, 0);
		keymat = ike_sa->get_keymat(ike_sa);
		if (integ)
		{
			proposal->add_algorithm(proposal, INTEGRITY_ALGORITHM, integ, 0);
		}
		if (encr)
		{
			proposal->add_algorithm(proposal, ENCRYPTION_ALGORITHM, encr, len);
		}
		if (prf)
		{
			proposal->add_algorithm(proposal, PSEUDO_RANDOM_FUNCTION, prf, 0);
		}
		charon->bus->set_sa(charon->bus, ike_sa);
		if (keymat->derive_ike_keys(keymat, proposal, &dh, nonce_i, nonce_r,
									 ike_sa->get_id(ike_sa), old_prf, old_skd))
		{
			if (old_sa)
			{
				peer_cfg_t *peer_cfg = old_sa->get_peer_cfg(old_sa);

				if (peer_cfg)
				{
					ike_sa->set_peer_cfg(ike_sa, peer_cfg);
					ike_sa->inherit(ike_sa, old_sa);
				}
				charon->ike_sa_manager->checkin_and_destroy(
												charon->ike_sa_manager, old_sa);
				old_sa = NULL;
			}
			ike_sa->set_state(ike_sa, IKE_CONNECTING);
			this->cache->cache(this->cache, ike_sa, message);
			message = NULL;
			charon->ike_sa_manager->checkin(charon->ike_sa_manager, ike_sa);
		}
		else
		{
			DBG1(DBG_IKE, "HA keymat derivation failed");
			ike_sa->destroy(ike_sa);
		}
		charon->bus->set_sa(charon->bus, NULL);
		proposal->destroy(proposal);
	}
	if (old_sa)
	{
		charon->ike_sa_manager->checkin(charon->ike_sa_manager, old_sa);
	}
	DESTROY_IF(message);
}

/**
 * Apply a condition flag to the IKE_SA if it is in set
 */
static void set_condition(ike_sa_t *ike_sa, ike_condition_t set,
						  ike_condition_t flag)
{
	ike_sa->set_condition(ike_sa, flag, flag & set);
}

/**
 * Apply a extension flag to the IKE_SA if it is in set
 */
static void set_extension(ike_sa_t *ike_sa, ike_extension_t set,
						  ike_extension_t flag)
{
	if (flag & set)
	{
		ike_sa->enable_extension(ike_sa, flag);
	}
}

/**
 * Process messages of type IKE_UPDATE
 */
static void process_ike_update(private_ha_dispatcher_t *this,
							   ha_message_t *message)
{
	ha_message_attribute_t attribute;
	ha_message_value_t value;
	enumerator_t *enumerator;
	ike_sa_t *ike_sa = NULL;
	peer_cfg_t *peer_cfg = NULL;
	auth_cfg_t *auth;
	bool received_vip = FALSE, first_peer_addr = TRUE;

	enumerator = message->create_attribute_enumerator(message);
	while (enumerator->enumerate(enumerator, &attribute, &value))
	{
		if (attribute != HA_IKE_ID && ike_sa == NULL)
		{
			/* must be first attribute */
			break;
		}
		switch (attribute)
		{
			case HA_IKE_ID:
				ike_sa = charon->ike_sa_manager->checkout(charon->ike_sa_manager,
														  value.ike_sa_id);
				break;
			case HA_LOCAL_ID:
				ike_sa->set_my_id(ike_sa, value.id->clone(value.id));
				break;
			case HA_REMOTE_ID:
				ike_sa->set_other_id(ike_sa, value.id->clone(value.id));
				break;
			case HA_REMOTE_EAP_ID:
				auth = auth_cfg_create();
				auth->add(auth, AUTH_RULE_EAP_IDENTITY, value.id->clone(value.id));
				ike_sa->add_auth_cfg(ike_sa, FALSE, auth);
				break;
			case HA_LOCAL_ADDR:
				ike_sa->set_my_host(ike_sa, value.host->clone(value.host));
				break;
			case HA_REMOTE_ADDR:
				ike_sa->set_other_host(ike_sa, value.host->clone(value.host));
				break;
			case HA_LOCAL_VIP:
				ike_sa->set_virtual_ip(ike_sa, TRUE, value.host);
				break;
			case HA_REMOTE_VIP:
				ike_sa->set_virtual_ip(ike_sa, FALSE, value.host);
				received_vip = TRUE;
				break;
			case HA_PEER_ADDR:
				if (first_peer_addr)
				{
					ike_sa->clear_peer_addresses(ike_sa);
					first_peer_addr = FALSE;
				}
				ike_sa->add_peer_address(ike_sa, value.host->clone(value.host));
				break;
			case HA_CONFIG_NAME:
				peer_cfg = charon->backends->get_peer_cfg_by_name(
												charon->backends, value.str);
				if (peer_cfg)
				{
					ike_sa->set_peer_cfg(ike_sa, peer_cfg);
					peer_cfg->destroy(peer_cfg);
				}
				else
				{
					DBG1(DBG_IKE, "HA is missing nodes peer configuration");
				}
				break;
			case HA_EXTENSIONS:
				set_extension(ike_sa, value.u32, EXT_NATT);
				set_extension(ike_sa, value.u32, EXT_MOBIKE);
				set_extension(ike_sa, value.u32, EXT_HASH_AND_URL);
				set_extension(ike_sa, value.u32, EXT_MULTIPLE_AUTH);
				set_extension(ike_sa, value.u32, EXT_STRONGSWAN);
				set_extension(ike_sa, value.u32, EXT_EAP_ONLY_AUTHENTICATION);
				set_extension(ike_sa, value.u32, EXT_MS_WINDOWS);
				break;
			case HA_CONDITIONS:
				set_condition(ike_sa, value.u32, COND_NAT_ANY);
				set_condition(ike_sa, value.u32, COND_NAT_HERE);
				set_condition(ike_sa, value.u32, COND_NAT_THERE);
				set_condition(ike_sa, value.u32, COND_NAT_FAKE);
				set_condition(ike_sa, value.u32, COND_EAP_AUTHENTICATED);
				set_condition(ike_sa, value.u32, COND_CERTREQ_SEEN);
				set_condition(ike_sa, value.u32, COND_ORIGINAL_INITIATOR);
				set_condition(ike_sa, value.u32, COND_STALE);
				break;
			default:
				break;
		}
	}
	enumerator->destroy(enumerator);

	if (ike_sa)
	{
		if (ike_sa->get_state(ike_sa) == IKE_CONNECTING &&
			ike_sa->get_peer_cfg(ike_sa))
		{
			DBG1(DBG_CFG, "installed HA passive IKE_SA '%s' %H[%Y]...%H[%Y]",
				 ike_sa->get_name(ike_sa),
				 ike_sa->get_my_host(ike_sa), ike_sa->get_my_id(ike_sa),
				 ike_sa->get_other_host(ike_sa), ike_sa->get_other_id(ike_sa));
			ike_sa->set_state(ike_sa, IKE_PASSIVE);
		}
		if (received_vip)
		{
			host_t *vip;
			char *pool;

			peer_cfg = ike_sa->get_peer_cfg(ike_sa);
			vip = ike_sa->get_virtual_ip(ike_sa, FALSE);
			if (peer_cfg && vip)
			{
				pool = peer_cfg->get_pool(peer_cfg);
				if (pool)
				{
					this->attr->reserve(this->attr, pool, vip);
				}
			}
		}
		this->cache->cache(this->cache, ike_sa, message);
		charon->ike_sa_manager->checkin(charon->ike_sa_manager, ike_sa);
	}
	else
	{
		DBG1(DBG_CFG, "passive HA IKE_SA to update not found");
		message->destroy(message);
	}
}

/**
 * Process messages of type IKE_MID_INITIATOR/RESPONDER
 */
static void process_ike_mid(private_ha_dispatcher_t *this,
							   ha_message_t *message, bool initiator)
{
	ha_message_attribute_t attribute;
	ha_message_value_t value;
	enumerator_t *enumerator;
	ike_sa_t *ike_sa = NULL;
	u_int32_t mid = 0;

	enumerator = message->create_attribute_enumerator(message);
	while (enumerator->enumerate(enumerator, &attribute, &value))
	{
		switch (attribute)
		{
			case HA_IKE_ID:
				ike_sa = charon->ike_sa_manager->checkout(charon->ike_sa_manager,
														  value.ike_sa_id);
				break;
			case HA_MID:
				mid = value.u32;
				break;
			default:
				break;
		}
	}
	enumerator->destroy(enumerator);

	if (ike_sa)
	{
		if (mid)
		{
			ike_sa->set_message_id(ike_sa, initiator, mid);
		}
		this->cache->cache(this->cache, ike_sa, message);
		charon->ike_sa_manager->checkin(charon->ike_sa_manager, ike_sa);
	}
	else
	{
		message->destroy(message);
	}
}

/**
 * Process messages of type IKE_DELETE
 */
static void process_ike_delete(private_ha_dispatcher_t *this,
							   ha_message_t *message)
{
	ha_message_attribute_t attribute;
	ha_message_value_t value;
	enumerator_t *enumerator;
	ike_sa_t *ike_sa = NULL;

	enumerator = message->create_attribute_enumerator(message);
	while (enumerator->enumerate(enumerator, &attribute, &value))
	{
		switch (attribute)
		{
			case HA_IKE_ID:
				ike_sa = charon->ike_sa_manager->checkout(
									charon->ike_sa_manager, value.ike_sa_id);
				break;
			default:
				break;
		}
	}
	enumerator->destroy(enumerator);
	if (ike_sa)
	{
		this->cache->cache(this->cache, ike_sa, message);
		charon->ike_sa_manager->checkin_and_destroy(
						charon->ike_sa_manager, ike_sa);
	}
	else
	{
		message->destroy(message);
	}
}

/**
 * Lookup a child cfg from the peer cfg by name
 */
static child_cfg_t* find_child_cfg(ike_sa_t *ike_sa, char *name)
{
	peer_cfg_t *peer_cfg;
	child_cfg_t *current, *found = NULL;
	enumerator_t *enumerator;

	peer_cfg = ike_sa->get_peer_cfg(ike_sa);
	if (peer_cfg)
	{
		enumerator = peer_cfg->create_child_cfg_enumerator(peer_cfg);
		while (enumerator->enumerate(enumerator, &current))
		{
			if (streq(current->get_name(current), name))
			{
				found = current;
				break;
			}
		}
		enumerator->destroy(enumerator);
	}
	return found;
}

/**
 * Process messages of type CHILD_ADD
 */
static void process_child_add(private_ha_dispatcher_t *this,
							  ha_message_t *message)
{
	ha_message_attribute_t attribute;
	ha_message_value_t value;
	enumerator_t *enumerator;
	ike_sa_t *ike_sa = NULL;
	char *config_name = "";
	child_cfg_t *config = NULL;
	child_sa_t *child_sa;
	proposal_t *proposal;
	keymat_t *keymat;
	bool initiator = FALSE, failed = FALSE;
	u_int32_t inbound_spi = 0, outbound_spi = 0;
	u_int16_t inbound_cpi = 0, outbound_cpi = 0;
	u_int8_t mode = MODE_TUNNEL, ipcomp = 0;
	u_int16_t encr = ENCR_UNDEFINED, integ = AUTH_UNDEFINED, len = 0;
	u_int16_t esn = NO_EXT_SEQ_NUMBERS;
	u_int seg_i, seg_o;
	chunk_t nonce_i = chunk_empty, nonce_r = chunk_empty, secret = chunk_empty;
	chunk_t encr_i, integ_i, encr_r, integ_r;
	linked_list_t *local_ts, *remote_ts;
	/* quick and dirty hack of a DH implementation */
	diffie_hellman_t dh = { .get_shared_secret = get_shared_secret,
							.destroy = (void*)&secret };

	enumerator = message->create_attribute_enumerator(message);
	while (enumerator->enumerate(enumerator, &attribute, &value))
	{
		switch (attribute)
		{
			case HA_IKE_ID:
				ike_sa = charon->ike_sa_manager->checkout(charon->ike_sa_manager,
														  value.ike_sa_id);
				break;
			case HA_CONFIG_NAME:
				config_name = value.str;
				break;
			case HA_INITIATOR:
				initiator = value.u8;
				break;
			case HA_INBOUND_SPI:
				inbound_spi = value.u32;
				break;
			case HA_OUTBOUND_SPI:
				outbound_spi = value.u32;
				break;
			case HA_INBOUND_CPI:
				inbound_cpi = value.u32;
				break;
			case HA_OUTBOUND_CPI:
				outbound_cpi = value.u32;
				break;
			case HA_IPSEC_MODE:
				mode = value.u8;
				break;
			case HA_IPCOMP:
				ipcomp = value.u8;
				break;
			case HA_ALG_ENCR:
				encr = value.u16;
				break;
			case HA_ALG_ENCR_LEN:
				len = value.u16;
				break;
			case HA_ALG_INTEG:
				integ = value.u16;
				break;
			case HA_ESN:
				esn = value.u16;
				break;
			case HA_NONCE_I:
				nonce_i = value.chunk;
				break;
			case HA_NONCE_R:
				nonce_r = value.chunk;
				break;
			case HA_SECRET:
				secret = value.chunk;
				break;
			default:
				break;
		}
	}
	enumerator->destroy(enumerator);

	if (!ike_sa)
	{
		DBG1(DBG_CHD, "IKE_SA for HA CHILD_SA not found");
		message->destroy(message);
		return;
	}
	config = find_child_cfg(ike_sa, config_name);
	if (!config)
	{
		DBG1(DBG_CHD, "HA is missing nodes child configuration");
		charon->ike_sa_manager->checkin(charon->ike_sa_manager, ike_sa);
		message->destroy(message);
		return;
	}

	child_sa = child_sa_create(ike_sa->get_my_host(ike_sa),
							   ike_sa->get_other_host(ike_sa), config, 0,
							   ike_sa->has_condition(ike_sa, COND_NAT_ANY));
	child_sa->set_mode(child_sa, mode);
	child_sa->set_protocol(child_sa, PROTO_ESP);
	child_sa->set_ipcomp(child_sa, ipcomp);

	proposal = proposal_create(PROTO_ESP, 0);
	if (integ)
	{
		proposal->add_algorithm(proposal, INTEGRITY_ALGORITHM, integ, 0);
	}
	if (encr)
	{
		proposal->add_algorithm(proposal, ENCRYPTION_ALGORITHM, encr, len);
	}
	proposal->add_algorithm(proposal, EXTENDED_SEQUENCE_NUMBERS, esn, 0);
	keymat = ike_sa->get_keymat(ike_sa);

	if (!keymat->derive_child_keys(keymat, proposal, secret.ptr ? &dh : NULL,
					nonce_i, nonce_r, &encr_i, &integ_i, &encr_r, &integ_r))
	{
		DBG1(DBG_CHD, "HA CHILD_SA key derivation failed");
		child_sa->destroy(child_sa);
		proposal->destroy(proposal);
		charon->ike_sa_manager->checkin(charon->ike_sa_manager, ike_sa);
		return;
	}
	child_sa->set_proposal(child_sa, proposal);
	child_sa->set_state(child_sa, CHILD_INSTALLING);
	proposal->destroy(proposal);

	/* TODO: Change CHILD_SA API to avoid cloning twice */
	local_ts = linked_list_create();
	remote_ts = linked_list_create();
	enumerator = message->create_attribute_enumerator(message);
	while (enumerator->enumerate(enumerator, &attribute, &value))
	{
		switch (attribute)
		{
			case HA_LOCAL_TS:
				local_ts->insert_last(local_ts, value.ts->clone(value.ts));
				break;
			case HA_REMOTE_TS:
				remote_ts->insert_last(remote_ts, value.ts->clone(value.ts));
				break;
			default:
				break;
		}
	}
	enumerator->destroy(enumerator);

	if (initiator)
	{
		if (child_sa->install(child_sa, encr_r, integ_r, inbound_spi,
					inbound_cpi, TRUE, TRUE, local_ts, remote_ts) != SUCCESS ||
			child_sa->install(child_sa, encr_i, integ_i, outbound_spi,
					outbound_cpi, FALSE, TRUE, local_ts, remote_ts) != SUCCESS)
		{
			failed = TRUE;
		}
	}
	else
	{
		if (child_sa->install(child_sa, encr_i, integ_i, inbound_spi,
					inbound_cpi, TRUE, TRUE, local_ts, remote_ts) != SUCCESS ||
			child_sa->install(child_sa, encr_r, integ_r, outbound_spi,
					outbound_cpi, FALSE, TRUE, local_ts, remote_ts) != SUCCESS)
		{
			failed = TRUE;
		}
	}
	chunk_clear(&encr_i);
	chunk_clear(&integ_i);
	chunk_clear(&encr_r);
	chunk_clear(&integ_r);

	if (failed)
	{
		DBG1(DBG_CHD, "HA CHILD_SA installation failed");
		child_sa->destroy(child_sa);
		local_ts->destroy_offset(local_ts, offsetof(traffic_selector_t, destroy));
		remote_ts->destroy_offset(remote_ts, offsetof(traffic_selector_t, destroy));
		charon->ike_sa_manager->checkin(charon->ike_sa_manager, ike_sa);
		message->destroy(message);
		return;
	}

	seg_i = this->kernel->get_segment_spi(this->kernel,
								ike_sa->get_my_host(ike_sa), inbound_spi);
	seg_o = this->kernel->get_segment_spi(this->kernel,
								ike_sa->get_other_host(ike_sa), outbound_spi);

	DBG1(DBG_CFG, "installed HA CHILD_SA %s{%d} %#R=== %#R "
		"(segment in: %d%s, out: %d%s)", child_sa->get_name(child_sa),
		child_sa->get_reqid(child_sa), local_ts, remote_ts,
		seg_i, this->segments->is_active(this->segments, seg_i) ? "*" : "",
		seg_o, this->segments->is_active(this->segments, seg_o) ? "*" : "");
	child_sa->add_policies(child_sa, local_ts, remote_ts);
	local_ts->destroy_offset(local_ts, offsetof(traffic_selector_t, destroy));
	remote_ts->destroy_offset(remote_ts, offsetof(traffic_selector_t, destroy));

	child_sa->set_state(child_sa, CHILD_INSTALLED);
	ike_sa->add_child_sa(ike_sa, child_sa);
	message->destroy(message);
	charon->ike_sa_manager->checkin(charon->ike_sa_manager, ike_sa);
}

/**
 * Process messages of type CHILD_DELETE
 */
static void process_child_delete(private_ha_dispatcher_t *this,
								 ha_message_t *message)
{
	ha_message_attribute_t attribute;
	ha_message_value_t value;
	enumerator_t *enumerator;
	ike_sa_t *ike_sa = NULL;
	child_sa_t *child_sa;
	u_int32_t spi = 0;

	enumerator = message->create_attribute_enumerator(message);
	while (enumerator->enumerate(enumerator, &attribute, &value))
	{
		switch (attribute)
		{
			case HA_IKE_ID:
				ike_sa = charon->ike_sa_manager->checkout(charon->ike_sa_manager,
														  value.ike_sa_id);
				break;
			case HA_INBOUND_SPI:
				spi = value.u32;
				break;
			default:
				break;
		}
	}
	enumerator->destroy(enumerator);

	if (ike_sa)
	{
		child_sa = ike_sa->get_child_sa(ike_sa, PROTO_ESP, spi, TRUE);
		if (child_sa)
		{
			ike_sa->destroy_child_sa(ike_sa, PROTO_ESP, spi);
		}
		charon->ike_sa_manager->checkin(charon->ike_sa_manager, ike_sa);
	}
	message->destroy(message);
}

/**
 * Process messages of type SEGMENT_TAKE/DROP
 */
static void process_segment(private_ha_dispatcher_t *this,
							ha_message_t *message, bool take)
{
	ha_message_attribute_t attribute;
	ha_message_value_t value;
	enumerator_t *enumerator;

	enumerator = message->create_attribute_enumerator(message);
	while (enumerator->enumerate(enumerator, &attribute, &value))
	{
		switch (attribute)
		{
			case HA_SEGMENT:
				if (take)
				{
					DBG1(DBG_CFG, "remote node takes segment %d", value.u16);
					this->segments->deactivate(this->segments, value.u16, FALSE);
				}
				else
				{
					DBG1(DBG_CFG, "remote node drops segment %d", value.u16);
					this->segments->activate(this->segments, value.u16, FALSE);
				}
				break;
			default:
				break;
		}
	}
	enumerator->destroy(enumerator);
	message->destroy(message);
}

/**
 * Process messages of type STATUS
 */
static void process_status(private_ha_dispatcher_t *this,
						   ha_message_t *message)
{
	ha_message_attribute_t attribute;
	ha_message_value_t value;
	enumerator_t *enumerator;
	segment_mask_t mask = 0;

	enumerator = message->create_attribute_enumerator(message);
	while (enumerator->enumerate(enumerator, &attribute, &value))
	{
		switch (attribute)
		{
			case HA_SEGMENT:
				mask |= SEGMENTS_BIT(value.u16);
				break;
			default:
				break;
		}
	}
	enumerator->destroy(enumerator);

	this->segments->handle_status(this->segments, mask);
	message->destroy(message);
}

/**
 * Process messages of type RESYNC
 */
static void process_resync(private_ha_dispatcher_t *this,
						   ha_message_t *message)
{
	ha_message_attribute_t attribute;
	ha_message_value_t value;
	enumerator_t *enumerator;

	enumerator = message->create_attribute_enumerator(message);
	while (enumerator->enumerate(enumerator, &attribute, &value))
	{
		switch (attribute)
		{
			case HA_SEGMENT:
				this->cache->resync(this->cache, value.u16);
				break;
			default:
				break;
		}
	}
	enumerator->destroy(enumerator);
	message->destroy(message);
}

/**
 * Dispatcher job function
 */
static job_requeue_t dispatch(private_ha_dispatcher_t *this)
{
	ha_message_t *message;
	ha_message_type_t type;

	message = this->socket->pull(this->socket);
	type = message->get_type(message);
	if (type != HA_STATUS)
	{
		DBG2(DBG_CFG, "received HA %N message", ha_message_type_names,
			 message->get_type(message));
	}
	switch (type)
	{
		case HA_IKE_ADD:
			process_ike_add(this, message);
			break;
		case HA_IKE_UPDATE:
			process_ike_update(this, message);
			break;
		case HA_IKE_MID_INITIATOR:
			process_ike_mid(this, message, TRUE);
			break;
		case HA_IKE_MID_RESPONDER:
			process_ike_mid(this, message, FALSE);
			break;
		case HA_IKE_DELETE:
			process_ike_delete(this, message);
			break;
		case HA_CHILD_ADD:
			process_child_add(this, message);
			break;
		case HA_CHILD_DELETE:
			process_child_delete(this, message);
			break;
		case HA_SEGMENT_DROP:
			process_segment(this, message, FALSE);
			break;
		case HA_SEGMENT_TAKE:
			process_segment(this, message, TRUE);
			break;
		case HA_STATUS:
			process_status(this, message);
			break;
		case HA_RESYNC:
			process_resync(this, message);
			break;
		default:
			DBG1(DBG_CFG, "received unknown HA message type %d", type);
			message->destroy(message);
			break;
	}
	return JOB_REQUEUE_DIRECT;
}

METHOD(ha_dispatcher_t, destroy, void,
	private_ha_dispatcher_t *this)
{
	this->job->cancel(this->job);
	free(this);
}

/**
 * See header
 */
ha_dispatcher_t *ha_dispatcher_create(ha_socket_t *socket,
									ha_segments_t *segments, ha_cache_t *cache,
									ha_kernel_t *kernel, ha_attribute_t *attr)
{
	private_ha_dispatcher_t *this;


	INIT(this,
		.public = {
			.destroy = _destroy,
		},
		.socket = socket,
		.segments = segments,
		.cache = cache,
		.kernel = kernel,
		.attr = attr,
	);
	this->job = callback_job_create_with_prio((callback_job_cb_t)dispatch,
										this, NULL, NULL, JOB_PRIO_CRITICAL);
	lib->processor->queue_job(lib->processor, (job_t*)this->job);

	return &this->public;
}