627 lines
16 KiB
C
627 lines
16 KiB
C
/*
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* Copyright (C) 2008 Martin Willi
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* Hochschule fuer Technik Rapperswil
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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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* $Id$
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*/
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#include "ha_sync_dispatcher.h"
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#include <daemon.h>
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#include <processing/jobs/callback_job.h>
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typedef struct private_ha_sync_dispatcher_t private_ha_sync_dispatcher_t;
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/**
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* Private data of an ha_sync_dispatcher_t object.
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*/
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struct private_ha_sync_dispatcher_t {
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/**
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* Public ha_sync_dispatcher_t interface.
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*/
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ha_sync_dispatcher_t public;
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/**
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* socket to pull messages from
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*/
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ha_sync_socket_t *socket;
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/**
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* Synced SA state cache
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*/
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ha_sync_cache_t *cache;
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/**
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* Dispatcher job
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*/
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callback_job_t *job;
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};
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/**
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* Quick and dirty hack implementation of diffie_hellman_t.get_shared_secret
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*/
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static status_t get_shared_secret(diffie_hellman_t *this, chunk_t *secret)
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{
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*secret = chunk_clone((*(chunk_t*)this->destroy));
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return SUCCESS;
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}
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/**
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* Process messages of type IKE_ADD
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*/
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static void process_ike_add(private_ha_sync_dispatcher_t *this,
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ha_sync_message_t *message)
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{
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ha_sync_message_attribute_t attribute;
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ha_sync_message_value_t value;
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enumerator_t *enumerator;
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ike_sa_t *ike_sa = NULL, *old_sa = NULL;
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u_int16_t encr = 0, len = 0, integ = 0, prf = 0, old_prf = PRF_UNDEFINED;
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chunk_t nonce_i = chunk_empty, nonce_r = chunk_empty;
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chunk_t secret = chunk_empty, old_skd = chunk_empty;
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enumerator = message->create_attribute_enumerator(message);
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while (enumerator->enumerate(enumerator, &attribute, &value))
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{
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switch (attribute)
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{
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case HA_SYNC_IKE_ID:
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ike_sa = this->cache->get_ike_sa(this->cache, value.ike_sa_id);
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DBG2(DBG_IKE, "got HA_SYNC_IKE_ADD: %llx:%llx - %p",
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value.ike_sa_id->get_initiator_spi(value.ike_sa_id),
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value.ike_sa_id->get_responder_spi(value.ike_sa_id),
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ike_sa);
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break;
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case HA_SYNC_IKE_REKEY_ID:
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old_sa = this->cache->get_ike_sa(this->cache, value.ike_sa_id);
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break;
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case HA_SYNC_NONCE_I:
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nonce_i = value.chunk;
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break;
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case HA_SYNC_NONCE_R:
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nonce_r = value.chunk;
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break;
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case HA_SYNC_SECRET:
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secret = value.chunk;
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break;
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case HA_SYNC_OLD_SKD:
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old_skd = value.chunk;
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break;
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case HA_SYNC_ALG_ENCR:
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encr = value.u16;
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break;
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case HA_SYNC_ALG_ENCR_LEN:
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len = value.u16;
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break;
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case HA_SYNC_ALG_INTEG:
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integ = value.u16;
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break;
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case HA_SYNC_ALG_PRF:
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prf = value.u16;
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break;
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case HA_SYNC_ALG_OLD_PRF:
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old_prf = value.u16;
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break;
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default:
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break;
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}
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}
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enumerator->destroy(enumerator);
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if (ike_sa)
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{
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proposal_t *proposal;
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keymat_t *keymat;
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/* quick and dirty hack of a DH implementation ;-) */
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diffie_hellman_t dh = { .get_shared_secret = get_shared_secret,
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.destroy = (void*)&secret };
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proposal = proposal_create(PROTO_IKE);
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keymat = ike_sa->get_keymat(ike_sa);
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if (integ)
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{
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proposal->add_algorithm(proposal, INTEGRITY_ALGORITHM, integ, 0);
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}
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if (encr)
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{
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proposal->add_algorithm(proposal, ENCRYPTION_ALGORITHM, encr, len);
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}
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if (prf)
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{
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proposal->add_algorithm(proposal, PSEUDO_RANDOM_FUNCTION, prf, 0);
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}
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charon->bus->set_sa(charon->bus, ike_sa);
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if (!keymat->derive_ike_keys(keymat, proposal, &dh, nonce_i, nonce_r,
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ike_sa->get_id(ike_sa), old_prf, old_skd))
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{
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DBG1(DBG_IKE, "HA sync keymat derivation failed");
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}
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charon->bus->set_sa(charon->bus, NULL);
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proposal->destroy(proposal);
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if (old_sa)
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{
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ike_sa->inherit(ike_sa, old_sa);
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this->cache->delete_ike_sa(this->cache, old_sa->get_id(old_sa));
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}
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}
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}
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/**
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* Apply a condition flag to the IKE_SA if it is in set
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*/
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static void set_condition(ike_sa_t *ike_sa, ike_condition_t set,
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ike_condition_t flag)
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{
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ike_sa->set_condition(ike_sa, flag, flag & set);
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}
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/**
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* Apply a extension flag to the IKE_SA if it is in set
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*/
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static void set_extension(ike_sa_t *ike_sa, ike_extension_t set,
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ike_extension_t flag)
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{
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if (flag & set)
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{
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ike_sa->enable_extension(ike_sa, flag);
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}
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}
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/**
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* Process messages of type IKE_UPDATE
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*/
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static void process_ike_update(private_ha_sync_dispatcher_t *this,
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ha_sync_message_t *message)
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{
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ha_sync_message_attribute_t attribute;
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ha_sync_message_value_t value;
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enumerator_t *enumerator;
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ike_sa_t *ike_sa = NULL;
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peer_cfg_t *peer_cfg = NULL;
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enumerator = message->create_attribute_enumerator(message);
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while (enumerator->enumerate(enumerator, &attribute, &value))
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{
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if (attribute != HA_SYNC_IKE_ID && ike_sa == NULL)
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{
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DBG1(DBG_IKE, "HA_SYNC_IKE_ID must be first attribute");
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break;
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}
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switch (attribute)
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{
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case HA_SYNC_IKE_ID:
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ike_sa = this->cache->get_ike_sa(this->cache, value.ike_sa_id);
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DBG2(DBG_IKE, "got HA_SYNC_IKE_UPDATE: %llx:%llx - %p",
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value.ike_sa_id->get_initiator_spi(value.ike_sa_id),
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value.ike_sa_id->get_responder_spi(value.ike_sa_id),
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ike_sa);
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break;
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case HA_SYNC_LOCAL_ID:
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ike_sa->set_my_id(ike_sa, value.id->clone(value.id));
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break;
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case HA_SYNC_REMOTE_ID:
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ike_sa->set_other_id(ike_sa, value.id->clone(value.id));
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break;
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case HA_SYNC_EAP_ID:
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ike_sa->set_eap_identity(ike_sa, value.id->clone(value.id));
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break;
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case HA_SYNC_LOCAL_ADDR:
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ike_sa->set_my_host(ike_sa, value.host->clone(value.host));
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break;
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case HA_SYNC_REMOTE_ADDR:
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ike_sa->set_other_host(ike_sa, value.host->clone(value.host));
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break;
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case HA_SYNC_LOCAL_VIP:
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case HA_SYNC_REMOTE_VIP:
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ike_sa->set_virtual_ip(ike_sa, attribute == HA_SYNC_LOCAL_VIP,
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value.host->clone(value.host));
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break;
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case HA_SYNC_ADDITIONAL_ADDR:
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ike_sa->add_additional_address(ike_sa,
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value.host->clone(value.host));
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break;
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case HA_SYNC_CONFIG_NAME:
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peer_cfg = charon->backends->get_peer_cfg_by_name(
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charon->backends, value.str);
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break;
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case HA_SYNC_CONDITIONS:
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set_condition(ike_sa, value.u32, EXT_NATT);
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set_condition(ike_sa, value.u32, EXT_MOBIKE);
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set_condition(ike_sa, value.u32, EXT_HASH_AND_URL);
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break;
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case HA_SYNC_EXTENSIONS:
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set_extension(ike_sa, value.u32, COND_NAT_ANY);
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set_extension(ike_sa, value.u32, COND_NAT_HERE);
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set_extension(ike_sa, value.u32, COND_NAT_THERE);
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set_extension(ike_sa, value.u32, COND_NAT_FAKE);
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set_extension(ike_sa, value.u32, COND_EAP_AUTHENTICATED);
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set_extension(ike_sa, value.u32, COND_CERTREQ_SEEN);
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set_extension(ike_sa, value.u32, COND_ORIGINAL_INITIATOR);
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break;
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default:
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break;
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}
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}
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enumerator->destroy(enumerator);
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if (peer_cfg)
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{
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ike_sa->set_peer_cfg(ike_sa, peer_cfg);
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peer_cfg->destroy(peer_cfg);
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charon->bus->set_sa(charon->bus, ike_sa);
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/* we use the CONNECTING state to indicate sync is complete. */
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/* TODO: add an additional HOT_COPY state? */
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ike_sa->set_state(ike_sa, IKE_CONNECTING);
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charon->bus->set_sa(charon->bus, NULL);
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}
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else
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{
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DBG1(DBG_IKE, "HA sync is missing nodes peer configuration");
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}
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}
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/**
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* Process messages of type IKE_DELETE
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*/
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static void process_ike_delete(private_ha_sync_dispatcher_t *this,
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ha_sync_message_t *message)
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{
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ha_sync_message_attribute_t attribute;
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ha_sync_message_value_t value;
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enumerator_t *enumerator;
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enumerator = message->create_attribute_enumerator(message);
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while (enumerator->enumerate(enumerator, &attribute, &value))
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{
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switch (attribute)
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{
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case HA_SYNC_IKE_ID:
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DBG2(DBG_IKE, "got HA_SYNC_IKE_DELETE: %llx:%llx",
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value.ike_sa_id->get_initiator_spi(value.ike_sa_id),
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value.ike_sa_id->get_responder_spi(value.ike_sa_id));
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this->cache->delete_ike_sa(this->cache, value.ike_sa_id);
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break;
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default:
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break;
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}
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}
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enumerator->destroy(enumerator);
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}
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/**
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* get the child_cfg with the same name as the peer cfg
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*/
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static child_cfg_t* find_child_cfg(char *name)
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{
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peer_cfg_t *peer_cfg;
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child_cfg_t *current, *found = NULL;
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enumerator_t *enumerator;
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peer_cfg = charon->backends->get_peer_cfg_by_name(charon->backends, name);
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if (peer_cfg)
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{
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enumerator = peer_cfg->create_child_cfg_enumerator(peer_cfg);
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while (enumerator->enumerate(enumerator, ¤t))
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{
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if (streq(current->get_name(current), name))
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{
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found = current;
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found->get_ref(found);
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break;
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}
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}
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enumerator->destroy(enumerator);
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peer_cfg->destroy(peer_cfg);
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}
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return found;
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}
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/**
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* Process messages of type CHILD_ADD
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*/
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static void process_child_add(private_ha_sync_dispatcher_t *this,
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ha_sync_message_t *message)
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{
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ha_sync_message_attribute_t attribute;
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ha_sync_message_value_t value;
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enumerator_t *enumerator;
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ike_sa_t *ike_sa = NULL;
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child_cfg_t *config = NULL;
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child_sa_t *child_sa;
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proposal_t *proposal;
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keymat_t *keymat;
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bool initiator, failed = FALSE;
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u_int32_t inbound_spi = 0, outbound_spi = 0;
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u_int16_t inbound_cpi = 0, outbound_cpi = 0;
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u_int8_t mode = MODE_TUNNEL, ipcomp = 0;
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u_int16_t encr = ENCR_UNDEFINED, integ = AUTH_UNDEFINED, len = 0;
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chunk_t nonce_i = chunk_empty, nonce_r = chunk_empty, secret = chunk_empty;
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chunk_t encr_i, integ_i, encr_r, integ_r;
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linked_list_t *local_ts, *remote_ts;
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/* quick and dirty hack of a DH implementation */
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diffie_hellman_t dh = { .get_shared_secret = get_shared_secret,
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.destroy = (void*)&secret };
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enumerator = message->create_attribute_enumerator(message);
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while (enumerator->enumerate(enumerator, &attribute, &value))
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{
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switch (attribute)
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{
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case HA_SYNC_IKE_ID:
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ike_sa = this->cache->get_ike_sa(this->cache, value.ike_sa_id);
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initiator = value.ike_sa_id->is_initiator(value.ike_sa_id);
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DBG2(DBG_CHD, "got HA_SYNC_CHILD_ADD: %llx:%llx - %p",
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value.ike_sa_id->get_initiator_spi(value.ike_sa_id),
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value.ike_sa_id->get_responder_spi(value.ike_sa_id),
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ike_sa);
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break;
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case HA_SYNC_CONFIG_NAME:
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config = find_child_cfg(value.str);
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break;
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case HA_SYNC_INBOUND_SPI:
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inbound_spi = value.u32;
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break;
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case HA_SYNC_OUTBOUND_SPI:
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outbound_spi = value.u32;
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break;
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case HA_SYNC_INBOUND_CPI:
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inbound_cpi = value.u32;
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break;
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case HA_SYNC_OUTBOUND_CPI:
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outbound_cpi = value.u32;
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break;
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case HA_SYNC_IPSEC_MODE:
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mode = value.u8;
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break;
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case HA_SYNC_IPCOMP:
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ipcomp = value.u8;
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break;
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case HA_SYNC_ALG_ENCR:
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encr = value.u16;
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break;
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case HA_SYNC_ALG_ENCR_LEN:
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len = value.u16;
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break;
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case HA_SYNC_ALG_INTEG:
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integ = value.u16;
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break;
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case HA_SYNC_NONCE_I:
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nonce_i = value.chunk;
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break;
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case HA_SYNC_NONCE_R:
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nonce_r = value.chunk;
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break;
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case HA_SYNC_SECRET:
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secret = value.chunk;
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break;
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default:
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break;
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}
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}
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enumerator->destroy(enumerator);
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if (!config)
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{
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DBG1(DBG_CHD, "HA sync is missing nodes child configuration");
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return;
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}
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if (!ike_sa)
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{
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config->destroy(config);
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DBG1(DBG_CHD, "IKE_SA for HA sync CHILD_SA not found");
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return;
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}
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charon->bus->set_sa(charon->bus, ike_sa);
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child_sa = child_sa_create(ike_sa->get_my_host(ike_sa),
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ike_sa->get_other_host(ike_sa), config, 0,
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ike_sa->has_condition(ike_sa, COND_NAT_ANY));
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config->destroy(config);
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child_sa->set_mode(child_sa, mode);
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child_sa->set_protocol(child_sa, PROTO_ESP);
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child_sa->set_ipcomp(child_sa, ipcomp);
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proposal = proposal_create(PROTO_ESP);
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if (integ)
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{
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proposal->add_algorithm(proposal, INTEGRITY_ALGORITHM, integ, 0);
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}
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if (encr)
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{
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proposal->add_algorithm(proposal, ENCRYPTION_ALGORITHM, encr, len);
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}
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keymat = ike_sa->get_keymat(ike_sa);
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if (!keymat->derive_child_keys(keymat, proposal, secret.ptr ? &dh : NULL,
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nonce_i, nonce_r, &encr_i, &integ_i, &encr_r, &integ_r))
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{
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DBG1(DBG_CHD, "HA sync CHILD_SA key derivation failed");
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child_sa->destroy(child_sa);
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proposal->destroy(proposal);
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charon->bus->set_sa(charon->bus, NULL);
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return;
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}
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child_sa->set_proposal(child_sa, proposal);
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child_sa->set_state(child_sa, CHILD_INSTALLING);
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proposal->destroy(proposal);
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if (initiator)
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{
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if (child_sa->install(child_sa, encr_r, integ_r,
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inbound_spi, inbound_cpi, TRUE) != SUCCESS ||
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child_sa->install(child_sa, encr_i, integ_i,
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outbound_spi, outbound_cpi, FALSE) != SUCCESS)
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{
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failed = TRUE;
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}
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}
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else
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{
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if (child_sa->install(child_sa, encr_i, integ_i,
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inbound_spi, inbound_cpi, TRUE) != SUCCESS ||
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child_sa->install(child_sa, encr_r, integ_r,
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outbound_spi, outbound_cpi, FALSE) != SUCCESS)
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{
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failed = TRUE;
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}
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}
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|
chunk_clear(&encr_i);
|
|
chunk_clear(&integ_i);
|
|
chunk_clear(&encr_r);
|
|
chunk_clear(&integ_r);
|
|
|
|
if (failed)
|
|
{
|
|
DBG1(DBG_CHD, "HA sync CHILD_SA installation failed");
|
|
child_sa->destroy(child_sa);
|
|
charon->bus->set_sa(charon->bus, NULL);
|
|
return;
|
|
}
|
|
|
|
/* 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_SYNC_LOCAL_TS:
|
|
local_ts->insert_last(local_ts, value.ts->clone(value.ts));
|
|
break;
|
|
case HA_SYNC_REMOTE_TS:
|
|
remote_ts->insert_last(remote_ts, value.ts->clone(value.ts));
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
enumerator->destroy(enumerator);
|
|
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);
|
|
charon->bus->set_sa(charon->bus, NULL);
|
|
}
|
|
|
|
/**
|
|
* Process messages of type CHILD_DELETE
|
|
*/
|
|
static void process_child_delete(private_ha_sync_dispatcher_t *this,
|
|
ha_sync_message_t *message)
|
|
{
|
|
ha_sync_message_attribute_t attribute;
|
|
ha_sync_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_SYNC_IKE_ID:
|
|
if (this->cache->has_ike_sa(this->cache, value.ike_sa_id))
|
|
{
|
|
ike_sa = this->cache->get_ike_sa(this->cache, value.ike_sa_id);
|
|
DBG2(DBG_CHD, "got HA_SYNC_CHILD_DELETE: %llx:%llx - %p",
|
|
value.ike_sa_id->get_initiator_spi(value.ike_sa_id),
|
|
value.ike_sa_id->get_responder_spi(value.ike_sa_id),
|
|
ike_sa);
|
|
continue;
|
|
}
|
|
break;
|
|
case HA_SYNC_INBOUND_SPI:
|
|
if (!ike_sa || ike_sa->destroy_child_sa(ike_sa, PROTO_ESP,
|
|
value.u32) != SUCCESS)
|
|
{
|
|
DBG1(DBG_CHD, "HA sync CHILD_SA 0x%lx delete failed (%p)",
|
|
value.u32, ike_sa);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
enumerator->destroy(enumerator);
|
|
}
|
|
|
|
/**
|
|
* Dispatcher job function
|
|
*/
|
|
static job_requeue_t dispatch(private_ha_sync_dispatcher_t *this)
|
|
{
|
|
ha_sync_message_t *message;
|
|
|
|
message = this->socket->pull(this->socket);
|
|
switch (message->get_type(message))
|
|
{
|
|
case HA_SYNC_IKE_ADD:
|
|
process_ike_add(this, message);
|
|
break;
|
|
case HA_SYNC_IKE_UPDATE:
|
|
process_ike_update(this, message);
|
|
break;
|
|
case HA_SYNC_IKE_DELETE:
|
|
process_ike_delete(this, message);
|
|
break;
|
|
case HA_SYNC_CHILD_ADD:
|
|
process_child_add(this, message);
|
|
break;
|
|
case HA_SYNC_CHILD_DELETE:
|
|
process_child_delete(this, message);
|
|
break;
|
|
default:
|
|
DBG1(DBG_CFG, "received unknown HA sync message type %d",
|
|
message->get_type(message));
|
|
break;
|
|
}
|
|
message->destroy(message);
|
|
|
|
return JOB_REQUEUE_DIRECT;
|
|
}
|
|
|
|
/**
|
|
* Implementation of ha_sync_dispatcher_t.destroy.
|
|
*/
|
|
static void destroy(private_ha_sync_dispatcher_t *this)
|
|
{
|
|
this->job->cancel(this->job);
|
|
free(this);
|
|
}
|
|
|
|
/**
|
|
* See header
|
|
*/
|
|
ha_sync_dispatcher_t *ha_sync_dispatcher_create(ha_sync_socket_t *socket,
|
|
ha_sync_cache_t *cache)
|
|
{
|
|
private_ha_sync_dispatcher_t *this = malloc_thing(private_ha_sync_dispatcher_t);
|
|
|
|
this->public.destroy = (void(*)(ha_sync_dispatcher_t*))destroy;
|
|
|
|
this->socket = socket;
|
|
this->cache = cache;
|
|
this->job = callback_job_create((callback_job_cb_t)dispatch,
|
|
this, NULL, NULL);
|
|
charon->processor->queue_job(charon->processor, (job_t*)this->job);
|
|
|
|
return &this->public;
|
|
}
|