211 lines
5.2 KiB
C
211 lines
5.2 KiB
C
/*
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* Copyright (C) 2006-2007 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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#include "ike_delete.h"
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#include <daemon.h>
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#include <encoding/payloads/delete_payload.h>
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typedef struct private_ike_delete_t private_ike_delete_t;
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/**
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* Private members of a ike_delete_t task.
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*/
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struct private_ike_delete_t {
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/**
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* Public methods and task_t interface.
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*/
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ike_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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* are we deleting a rekeyed SA?
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*/
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bool rekeyed;
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/**
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* are we responding to a delete, but have initated our own?
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*/
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bool simultaneous;
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};
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/**
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* Implementation of task_t.build for initiator
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*/
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static status_t build_i(private_ike_delete_t *this, message_t *message)
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{
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delete_payload_t *delete_payload;
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DBG0(DBG_IKE, "deleting IKE_SA %s[%d] between %H[%Y]...%H[%Y]",
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this->ike_sa->get_name(this->ike_sa),
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this->ike_sa->get_unique_id(this->ike_sa),
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this->ike_sa->get_my_host(this->ike_sa),
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this->ike_sa->get_my_id(this->ike_sa),
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this->ike_sa->get_other_host(this->ike_sa),
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this->ike_sa->get_other_id(this->ike_sa));
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delete_payload = delete_payload_create(PROTO_IKE);
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message->add_payload(message, (payload_t*)delete_payload);
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if (this->ike_sa->get_state(this->ike_sa) == IKE_REKEYING)
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{
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this->rekeyed = TRUE;
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}
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this->ike_sa->set_state(this->ike_sa, IKE_DELETING);
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DBG1(DBG_IKE, "sending DELETE for IKE_SA %s[%d]",
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this->ike_sa->get_name(this->ike_sa),
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this->ike_sa->get_unique_id(this->ike_sa));
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return NEED_MORE;
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}
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/**
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* Implementation of task_t.process for initiator
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*/
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static status_t process_i(private_ike_delete_t *this, message_t *message)
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{
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DBG0(DBG_IKE, "IKE_SA deleted");
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if (!this->rekeyed)
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{ /* invoke ike_down() hook if SA has not been rekeyed */
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charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
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}
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/* completed, delete IKE_SA by returning DESTROY_ME */
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return DESTROY_ME;
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}
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/**
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* Implementation of task_t.process for responder
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*/
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static status_t process_r(private_ike_delete_t *this, message_t *message)
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{
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/* we don't even scan the payloads, as the message wouldn't have
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* come so far without being correct */
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DBG1(DBG_IKE, "received DELETE for IKE_SA %s[%d]",
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this->ike_sa->get_name(this->ike_sa),
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this->ike_sa->get_unique_id(this->ike_sa));
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DBG0(DBG_IKE, "deleting IKE_SA %s[%d] between %H[%Y]...%H[%Y]",
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this->ike_sa->get_name(this->ike_sa),
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this->ike_sa->get_unique_id(this->ike_sa),
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this->ike_sa->get_my_host(this->ike_sa),
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this->ike_sa->get_my_id(this->ike_sa),
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this->ike_sa->get_other_host(this->ike_sa),
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this->ike_sa->get_other_id(this->ike_sa));
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switch (this->ike_sa->get_state(this->ike_sa))
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{
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case IKE_ESTABLISHED:
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this->ike_sa->set_state(this->ike_sa, IKE_DELETING);
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this->ike_sa->reestablish(this->ike_sa);
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return NEED_MORE;
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case IKE_REKEYING:
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this->rekeyed = TRUE;
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break;
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case IKE_DELETING:
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this->simultaneous = TRUE;
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break;
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default:
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break;
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}
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this->ike_sa->set_state(this->ike_sa, IKE_DELETING);
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return NEED_MORE;
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}
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/**
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* Implementation of task_t.build for responder
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*/
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static status_t build_r(private_ike_delete_t *this, message_t *message)
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{
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DBG0(DBG_IKE, "IKE_SA deleted");
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if (this->simultaneous)
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{
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/* wait for peer's response for our delete request, but set a timeout */
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return SUCCESS;
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}
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if (!this->rekeyed)
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{ /* invoke ike_down() hook if SA has not been rekeyed */
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charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
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}
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/* completed, delete IKE_SA by returning DESTROY_ME */
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return DESTROY_ME;
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}
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/**
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* Implementation of task_t.get_type
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*/
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static task_type_t get_type(private_ike_delete_t *this)
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{
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return IKE_DELETE;
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}
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/**
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* Implementation of task_t.migrate
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*/
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static void migrate(private_ike_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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this->simultaneous = FALSE;
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}
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/**
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* Implementation of task_t.destroy
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*/
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static void destroy(private_ike_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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ike_delete_t *ike_delete_create(ike_sa_t *ike_sa, bool initiator)
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{
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private_ike_delete_t *this = malloc_thing(private_ike_delete_t);
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this->public.task.get_type = (task_type_t(*)(task_t*))get_type;
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this->public.task.migrate = (void(*)(task_t*,ike_sa_t*))migrate;
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this->public.task.destroy = (void(*)(task_t*))destroy;
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if (initiator)
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{
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this->public.task.build = (status_t(*)(task_t*,message_t*))build_i;
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this->public.task.process = (status_t(*)(task_t*,message_t*))process_i;
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}
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else
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{
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this->public.task.build = (status_t(*)(task_t*,message_t*))build_r;
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this->public.task.process = (status_t(*)(task_t*,message_t*))process_r;
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}
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this->ike_sa = ike_sa;
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this->initiator = initiator;
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this->rekeyed = FALSE;
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this->simultaneous = FALSE;
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return &this->public;
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}
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