Tobias Brunner
4f4d4021b4
While combining the actions could cause duplicates (while the SA is initiated, traffic might trigger the trap and the initiation of another CHILD_SA), the previous commit should avoid most duplicates. If reuse_ikesa is disabled, duplicates can't be prevented, though.
316 lines
8.0 KiB
C
316 lines
8.0 KiB
C
/*
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* Copyright (C) 2011 Martin Willi
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* Copyright (C) 2011 revosec AG
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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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/*
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* Copyright (C) 2013 Oliver Smith
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "quick_delete.h"
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#include <daemon.h>
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#include <encoding/payloads/delete_payload.h>
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#include <sa/ikev1/task_manager_v1.h>
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typedef struct private_quick_delete_t private_quick_delete_t;
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/**
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* Private members of a quick_delete_t task.
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*/
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struct private_quick_delete_t {
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/**
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* Public methods and task_t interface.
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*/
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quick_delete_t public;
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/**
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* Assigned IKE_SA.
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*/
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ike_sa_t *ike_sa;
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/**
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* Are we the initiator?
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*/
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bool initiator;
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/**
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* Protocol of CHILD_SA to delete
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*/
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protocol_id_t protocol;
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/**
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* Inbound SPI of CHILD_SA to delete
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*/
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uint32_t spi;
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/**
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* Send delete even if SA does not exist
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*/
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bool force;
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/**
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* SA already expired?
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*/
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bool expired;
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};
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/**
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* Delete the specified CHILD_SA, if found
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*/
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static status_t delete_child(private_quick_delete_t *this,
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protocol_id_t protocol, uint32_t spi,
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bool remote_close)
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{
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uint64_t bytes_in, bytes_out;
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child_sa_t *child_sa;
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linked_list_t *my_ts, *other_ts;
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child_cfg_t *child_cfg;
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status_t status = SUCCESS;
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bool rekeyed;
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child_sa = this->ike_sa->get_child_sa(this->ike_sa, protocol, spi, TRUE);
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if (!child_sa)
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{ /* fallback and check for outbound SA */
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child_sa = this->ike_sa->get_child_sa(this->ike_sa, protocol, spi, FALSE);
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if (!child_sa)
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{
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return NOT_FOUND;
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}
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this->spi = spi = child_sa->get_spi(child_sa, TRUE);
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}
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rekeyed = child_sa->get_state(child_sa) == CHILD_REKEYED;
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if (!rekeyed)
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{
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rekeyed = ikev1_child_sa_is_redundant(this->ike_sa, child_sa, NULL);
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}
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child_sa->set_state(child_sa, CHILD_DELETING);
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my_ts = linked_list_create_from_enumerator(
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child_sa->create_ts_enumerator(child_sa, TRUE));
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other_ts = linked_list_create_from_enumerator(
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child_sa->create_ts_enumerator(child_sa, FALSE));
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if (this->expired)
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{
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DBG0(DBG_IKE, "closing expired CHILD_SA %s{%d} "
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"with SPIs %.8x_i %.8x_o and TS %#R === %#R",
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child_sa->get_name(child_sa), child_sa->get_unique_id(child_sa),
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ntohl(child_sa->get_spi(child_sa, TRUE)),
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ntohl(child_sa->get_spi(child_sa, FALSE)), my_ts, other_ts);
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}
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else
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{
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child_sa->get_usestats(child_sa, TRUE, NULL, &bytes_in, NULL);
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child_sa->get_usestats(child_sa, FALSE, NULL, &bytes_out, NULL);
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DBG0(DBG_IKE, "closing CHILD_SA %s{%d} with SPIs "
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"%.8x_i (%llu bytes) %.8x_o (%llu bytes) and TS %#R === %#R",
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child_sa->get_name(child_sa), child_sa->get_unique_id(child_sa),
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ntohl(child_sa->get_spi(child_sa, TRUE)), bytes_in,
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ntohl(child_sa->get_spi(child_sa, FALSE)), bytes_out,
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my_ts, other_ts);
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}
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my_ts->destroy(my_ts);
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other_ts->destroy(other_ts);
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child_sa->set_state(child_sa, CHILD_DELETED);
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if (!rekeyed)
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{
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charon->bus->child_updown(charon->bus, child_sa, FALSE);
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if (remote_close)
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{
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child_init_args_t args = {
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.reqid = child_sa->get_reqid(child_sa),
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};
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action_t action;
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action = child_sa->get_close_action(child_sa);
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child_cfg = child_sa->get_config(child_sa);
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child_cfg->get_ref(child_cfg);
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if (action & ACTION_TRAP)
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{
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charon->traps->install(charon->traps,
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this->ike_sa->get_peer_cfg(this->ike_sa),
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child_cfg);
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}
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if (action & ACTION_START)
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{
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child_cfg->get_ref(child_cfg);
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status = this->ike_sa->initiate(this->ike_sa, child_cfg, &args);
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}
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child_cfg->destroy(child_cfg);
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}
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}
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if (status == SUCCESS)
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{
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this->ike_sa->destroy_child_sa(this->ike_sa, protocol, spi);
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}
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return status;
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}
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METHOD(task_t, build_i, status_t,
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private_quick_delete_t *this, message_t *message)
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{
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if (delete_child(this, this->protocol, this->spi, FALSE) == SUCCESS ||
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this->force)
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{
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delete_payload_t *delete_payload;
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DBG1(DBG_IKE, "sending DELETE for %N CHILD_SA with SPI %.8x",
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protocol_id_names, this->protocol, ntohl(this->spi));
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delete_payload = delete_payload_create(PLV1_DELETE, this->protocol);
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delete_payload->add_spi(delete_payload, this->spi);
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message->add_payload(message, &delete_payload->payload_interface);
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return SUCCESS;
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}
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this->ike_sa->flush_queue(this->ike_sa, TASK_QUEUE_ACTIVE);
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return ALREADY_DONE;
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}
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METHOD(task_t, process_i, status_t,
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private_quick_delete_t *this, message_t *message)
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{
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return FAILED;
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}
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METHOD(task_t, process_r, status_t,
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private_quick_delete_t *this, message_t *message)
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{
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enumerator_t *payloads, *spis;
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payload_t *payload;
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delete_payload_t *delete_payload;
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protocol_id_t protocol;
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status_t status = SUCCESS;
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uint32_t spi;
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payloads = message->create_payload_enumerator(message);
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while (payloads->enumerate(payloads, &payload))
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{
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if (payload->get_type(payload) == PLV1_DELETE)
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{
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delete_payload = (delete_payload_t*)payload;
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protocol = delete_payload->get_protocol_id(delete_payload);
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if (protocol != PROTO_ESP && protocol != PROTO_AH)
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{
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continue;
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}
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spis = delete_payload->create_spi_enumerator(delete_payload);
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while (spis->enumerate(spis, &spi))
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{
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DBG1(DBG_IKE, "received DELETE for %N CHILD_SA with SPI %.8x",
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protocol_id_names, protocol, ntohl(spi));
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status = delete_child(this, protocol, spi, TRUE);
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if (status == NOT_FOUND)
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{
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DBG1(DBG_IKE, "CHILD_SA not found, ignored");
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status = SUCCESS;
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}
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if (status != SUCCESS)
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{
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break;
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}
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}
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spis->destroy(spis);
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}
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if (status != SUCCESS)
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{
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break;
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}
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}
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payloads->destroy(payloads);
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return status;
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}
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METHOD(task_t, build_r, status_t,
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private_quick_delete_t *this, message_t *message)
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{
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return FAILED;
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}
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METHOD(task_t, get_type, task_type_t,
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private_quick_delete_t *this)
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{
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return TASK_QUICK_DELETE;
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}
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METHOD(task_t, migrate, void,
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private_quick_delete_t *this, ike_sa_t *ike_sa)
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{
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this->ike_sa = ike_sa;
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}
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METHOD(task_t, destroy, void,
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private_quick_delete_t *this)
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{
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free(this);
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}
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/*
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* Described in header.
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*/
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quick_delete_t *quick_delete_create(ike_sa_t *ike_sa, protocol_id_t protocol,
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uint32_t spi, bool force, bool expired)
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{
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private_quick_delete_t *this;
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INIT(this,
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.public = {
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.task = {
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.get_type = _get_type,
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.migrate = _migrate,
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.destroy = _destroy,
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},
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},
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.ike_sa = ike_sa,
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.protocol = protocol,
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.spi = spi,
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.force = force,
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.expired = expired,
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);
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if (protocol != PROTO_NONE)
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{
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this->public.task.build = _build_i;
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this->public.task.process = _process_i;
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}
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else
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{
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this->public.task.build = _build_r;
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this->public.task.process = _process_r;
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}
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return &this->public;
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}
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