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/*
* 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_child.h"
typedef struct private_ha_child_t private_ha_child_t;
/**
* Private data of an ha_child_t object.
*/
struct private_ha_child_t {
/**
* Public ha_child_t interface.
*/
ha_child_t public;
/**
* socket we use for syncing
*/
ha_socket_t *socket;
/**
* tunnel securing sync messages
*/
ha_tunnel_t *tunnel;
/**
* Segment handling
*/
ha_segments_t *segments;
/**
* Kernel helper
*/
ha_kernel_t *kernel;
};
METHOD(listener_t, child_keys, bool,
private_ha_child_t *this, ike_sa_t *ike_sa, child_sa_t *child_sa,
bool initiator, diffie_hellman_t *dh, chunk_t nonce_i, chunk_t nonce_r)
{
ha_message_t *m;
chunk_t secret;
proposal_t *proposal;
u_int16_t alg, len;
linked_list_t *local_ts, *remote_ts;
enumerator_t *enumerator;
traffic_selector_t *ts;
u_int seg_i, seg_o;
if (this->tunnel && this->tunnel->is_sa(this->tunnel, ike_sa))
{ /* do not sync SA between nodes */
return TRUE;
}
m = ha_message_create(HA_CHILD_ADD);
m->add_attribute(m, HA_IKE_ID, ike_sa->get_id(ike_sa));
m->add_attribute(m, HA_INITIATOR, (u_int8_t)initiator);
m->add_attribute(m, HA_INBOUND_SPI, child_sa->get_spi(child_sa, TRUE));
m->add_attribute(m, HA_OUTBOUND_SPI, child_sa->get_spi(child_sa, FALSE));
m->add_attribute(m, HA_INBOUND_CPI, child_sa->get_cpi(child_sa, TRUE));
m->add_attribute(m, HA_OUTBOUND_CPI, child_sa->get_cpi(child_sa, FALSE));
m->add_attribute(m, HA_IPSEC_MODE, child_sa->get_mode(child_sa));
m->add_attribute(m, HA_IPCOMP, child_sa->get_ipcomp(child_sa));
m->add_attribute(m, HA_CONFIG_NAME, child_sa->get_name(child_sa));
proposal = child_sa->get_proposal(child_sa);
if (proposal->get_algorithm(proposal, ENCRYPTION_ALGORITHM, &alg, &len))
{
m->add_attribute(m, HA_ALG_ENCR, alg);
if (len)
{
m->add_attribute(m, HA_ALG_ENCR_LEN, len);
}
}
if (proposal->get_algorithm(proposal, INTEGRITY_ALGORITHM, &alg, NULL))
{
m->add_attribute(m, HA_ALG_INTEG, alg);
}
if (proposal->get_algorithm(proposal, EXTENDED_SEQUENCE_NUMBERS, &alg, NULL))
{
m->add_attribute(m, HA_ESN, alg);
}
m->add_attribute(m, HA_NONCE_I, nonce_i);
m->add_attribute(m, HA_NONCE_R, nonce_r);
if (dh && dh->get_shared_secret(dh, &secret) == SUCCESS)
{
m->add_attribute(m, HA_SECRET, secret);
chunk_clear(&secret);
}
local_ts = child_sa->get_traffic_selectors(child_sa, TRUE);
enumerator = local_ts->create_enumerator(local_ts);
while (enumerator->enumerate(enumerator, &ts))
{
m->add_attribute(m, HA_LOCAL_TS, ts);
}
enumerator->destroy(enumerator);
remote_ts = child_sa->get_traffic_selectors(child_sa, FALSE);
enumerator = remote_ts->create_enumerator(remote_ts);
while (enumerator->enumerate(enumerator, &ts))
{
m->add_attribute(m, HA_REMOTE_TS, ts);
}
enumerator->destroy(enumerator);
seg_i = this->kernel->get_segment_spi(this->kernel,
ike_sa->get_my_host(ike_sa), child_sa->get_spi(child_sa, TRUE));
seg_o = this->kernel->get_segment_spi(this->kernel,
ike_sa->get_other_host(ike_sa), child_sa->get_spi(child_sa, FALSE));
DBG1(DBG_CFG, "handling 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) ? "*" : "");
this->socket->push(this->socket, m);
m->destroy(m);
return TRUE;
}
METHOD(listener_t, child_state_change, bool,
private_ha_child_t *this, ike_sa_t *ike_sa,
child_sa_t *child_sa, child_sa_state_t state)
{
if (!ike_sa ||
ike_sa->get_state(ike_sa) == IKE_PASSIVE ||
ike_sa->get_state(ike_sa) == IKE_DESTROYING)
{ /* only sync active IKE_SAs */
return TRUE;
}
if (this->tunnel && this->tunnel->is_sa(this->tunnel, ike_sa))
{ /* do not sync SA between nodes */
return TRUE;
}
if (state == CHILD_DESTROYING)
{
ha_message_t *m;
m = ha_message_create(HA_CHILD_DELETE);
m->add_attribute(m, HA_IKE_ID, ike_sa->get_id(ike_sa));
m->add_attribute(m, HA_INBOUND_SPI,
child_sa->get_spi(child_sa, TRUE));
this->socket->push(this->socket, m);
m->destroy(m);
}
return TRUE;
}
METHOD(ha_child_t, destroy, void,
private_ha_child_t *this)
{
free(this);
}
/**
* See header
*/
ha_child_t *ha_child_create(ha_socket_t *socket, ha_tunnel_t *tunnel,
ha_segments_t *segments, ha_kernel_t *kernel)
{
private_ha_child_t *this;
INIT(this,
.public = {
.listener = {
.child_keys = _child_keys,
.child_state_change = _child_state_change,
},
.destroy = _destroy,
},
.socket = socket,
.tunnel = tunnel,
.segments = segments,
.kernel = kernel,
);
return &this->public;
}
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