1 files changed, 0 insertions, 482 deletions

diff --git a/src/libcharon/sa/tasks/child_rekey.c b/src/libcharon/sa/tasks/child_rekey.c
deleted file mode 100644
index 76d185590..000000000
--- a/src/libcharon/sa/tasks/child_rekey.c
+++ /dev/null
@@ -1,482 +0,0 @@
-/*
- * Copyright (C) 2005-2007 Martin Willi
- * Copyright (C) 2005 Jan Hutter
- * 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 "child_rekey.h"
-
-#include <daemon.h>
-#include <encoding/payloads/notify_payload.h>
-#include <sa/tasks/child_create.h>
-#include <sa/tasks/child_delete.h>
-#include <processing/jobs/rekey_child_sa_job.h>
-#include <processing/jobs/rekey_ike_sa_job.h>
-
-
-typedef struct private_child_rekey_t private_child_rekey_t;
-
-/**
- * Private members of a child_rekey_t task.
- */
-struct private_child_rekey_t {
-
-	/**
-	 * Public methods and task_t interface.
-	 */
-	child_rekey_t public;
-
-	/**
-	 * Assigned IKE_SA.
-	 */
-	ike_sa_t *ike_sa;
-
-	/**
-	 * Are we the initiator?
-	 */
-	bool initiator;
-
-	/**
-	 * Protocol of CHILD_SA to rekey
-	 */
-	protocol_id_t protocol;
-
-	/**
-	 * Inbound SPI of CHILD_SA to rekey
-	 */
-	u_int32_t spi;
-
-	/**
-	 * the CHILD_CREATE task which is reused to simplify rekeying
-	 */
-	child_create_t *child_create;
-
-	/**
-	 * the CHILD_DELETE task to delete rekeyed CHILD_SA
-	 */
-	child_delete_t *child_delete;
-
-	/**
-	 * CHILD_SA which gets rekeyed
-	 */
-	child_sa_t *child_sa;
-
-	/**
-	 * colliding task, may be delete or rekey
-	 */
-	task_t *collision;
-
-	/**
-	 * Indicate that peer destroyed the redundant child from collision.
-	 * This happens if a peer's delete notification for the redundant
-	 * child gets processed before the rekey job. If so, we must not
-	 * touch the child created in the collision since it points to
-	 * memory already freed.
-	 */
-	bool other_child_destroyed;
-};
-
-/**
- * Implementation of task_t.build for initiator, after rekeying
- */
-static status_t build_i_delete(private_child_rekey_t *this, message_t *message)
-{
-	/* update exchange type to INFORMATIONAL for the delete */
-	message->set_exchange_type(message, INFORMATIONAL);
-
-	return this->child_delete->task.build(&this->child_delete->task, message);
-}
-
-/**
- * Implementation of task_t.process for initiator, after rekeying
- */
-static status_t process_i_delete(private_child_rekey_t *this, message_t *message)
-{
-	return this->child_delete->task.process(&this->child_delete->task, message);
-}
-
-/**
- * find a child using the REKEY_SA notify
- */
-static void find_child(private_child_rekey_t *this, message_t *message)
-{
-	notify_payload_t *notify;
-	protocol_id_t protocol;
-	u_int32_t spi;
-
-	notify = message->get_notify(message, REKEY_SA);
-	if (notify)
-	{
-		protocol = notify->get_protocol_id(notify);
-		spi = notify->get_spi(notify);
-
-		if (protocol == PROTO_ESP || protocol == PROTO_AH)
-		{
-			this->child_sa = this->ike_sa->get_child_sa(this->ike_sa, protocol,
-														spi, FALSE);
-		}
-	}
-}
-
-METHOD(task_t, build_i, status_t,
-	private_child_rekey_t *this, message_t *message)
-{
-	notify_payload_t *notify;
-	u_int32_t reqid;
-	child_cfg_t *config;
-
-	this->child_sa = this->ike_sa->get_child_sa(this->ike_sa, this->protocol,
-												this->spi, TRUE);
-	if (!this->child_sa)
-	{	/* check if it is an outbound CHILD_SA */
-		this->child_sa = this->ike_sa->get_child_sa(this->ike_sa, this->protocol,
-													this->spi, FALSE);
-		if (!this->child_sa)
-		{	/* CHILD_SA is gone, unable to rekey. As an empty CREATE_CHILD_SA
-			 * exchange is invalid, we fall back to an INFORMATIONAL exchange.*/
-			message->set_exchange_type(message, INFORMATIONAL);
-			return SUCCESS;
-		}
-		/* we work only with the inbound SPI */
-		this->spi = this->child_sa->get_spi(this->child_sa, TRUE);
-	}
-	config = this->child_sa->get_config(this->child_sa);
-
-	/* we just need the rekey notify ... */
-	notify = notify_payload_create_from_protocol_and_type(this->protocol,
-														  REKEY_SA);
-	notify->set_spi(notify, this->spi);
-	message->add_payload(message, (payload_t*)notify);
-
-	/* ... our CHILD_CREATE task does the hard work for us. */
-	if (!this->child_create)
-	{
-		this->child_create = child_create_create(this->ike_sa, config, TRUE,
-												 NULL, NULL);
-	}
-	reqid = this->child_sa->get_reqid(this->child_sa);
-	this->child_create->use_reqid(this->child_create, reqid);
-	this->child_create->task.build(&this->child_create->task, message);
-
-	this->child_sa->set_state(this->child_sa, CHILD_REKEYING);
-
-	return NEED_MORE;
-}
-
-METHOD(task_t, process_r, status_t,
-	private_child_rekey_t *this, message_t *message)
-{
-	/* let the CHILD_CREATE task process the message */
-	this->child_create->task.process(&this->child_create->task, message);
-
-	find_child(this, message);
-
-	return NEED_MORE;
-}
-
-METHOD(task_t, build_r, status_t,
-	private_child_rekey_t *this, message_t *message)
-{
-	u_int32_t reqid;
-
-	if (this->child_sa == NULL ||
-		this->child_sa->get_state(this->child_sa) == CHILD_DELETING)
-	{
-		DBG1(DBG_IKE, "unable to rekey, CHILD_SA not found");
-		message->add_notify(message, TRUE, NO_PROPOSAL_CHOSEN, chunk_empty);
-		return SUCCESS;
-	}
-
-	/* let the CHILD_CREATE task build the response */
-	reqid = this->child_sa->get_reqid(this->child_sa);
-	this->child_create->use_reqid(this->child_create, reqid);
-	this->child_create->task.build(&this->child_create->task, message);
-
-	if (message->get_payload(message, SECURITY_ASSOCIATION) == NULL)
-	{
-		/* rekeying failed, reuse old child */
-		this->child_sa->set_state(this->child_sa, CHILD_INSTALLED);
-		return SUCCESS;
-	}
-
-	this->child_sa->set_state(this->child_sa, CHILD_REKEYING);
-
-	/* invoke rekey hook */
-	charon->bus->child_rekey(charon->bus, this->child_sa,
-							 this->child_create->get_child(this->child_create));
-	return SUCCESS;
-}
-
-/**
- * Handle a rekey collision
- */
-static child_sa_t *handle_collision(private_child_rekey_t *this)
-{
-	child_sa_t *to_delete;
-
-	if (this->collision->get_type(this->collision) == CHILD_REKEY)
-	{
-		chunk_t this_nonce, other_nonce;
-		private_child_rekey_t *other = (private_child_rekey_t*)this->collision;
-
-		this_nonce = this->child_create->get_lower_nonce(this->child_create);
-		other_nonce = other->child_create->get_lower_nonce(other->child_create);
-
-		/* if we have the lower nonce, delete rekeyed SA. If not, delete
-		 * the redundant. */
-		if (memcmp(this_nonce.ptr, other_nonce.ptr,
-				   min(this_nonce.len, other_nonce.len)) > 0)
-		{
-			child_sa_t *child_sa;
-
-			DBG1(DBG_IKE, "CHILD_SA rekey collision won, deleting old child");
-			to_delete = this->child_sa;
-			/* don't touch child other created, it has already been deleted */
-			if (!this->other_child_destroyed)
-			{
-				/* disable close action for the redundand child */
-				child_sa = other->child_create->get_child(other->child_create);
-				if (child_sa)
-				{
-					child_sa->set_close_action(child_sa, ACTION_NONE);
-				}
-			}
-		}
-		else
-		{
-			DBG1(DBG_IKE, "CHILD_SA rekey collision lost, "
-				 "deleting rekeyed child");
-			to_delete = this->child_create->get_child(this->child_create);
-		}
-	}
-	else
-	{	/* CHILD_DELETE */
-		child_delete_t *del = (child_delete_t*)this->collision;
-
-		/* we didn't had a chance to compare the nonces, so we delete
-		 * the CHILD_SA the other is not deleting. */
-		if (del->get_child(del) != this->child_sa)
-		{
-			DBG1(DBG_IKE, "CHILD_SA rekey/delete collision, "
-				 "deleting rekeyed child");
-			to_delete = this->child_sa;
-		}
-		else
-		{
-			DBG1(DBG_IKE, "CHILD_SA rekey/delete collision, "
-				 "deleting redundant child");
-			to_delete = this->child_create->get_child(this->child_create);
-		}
-	}
-	return to_delete;
-}
-
-METHOD(task_t, process_i, status_t,
-	private_child_rekey_t *this, message_t *message)
-{
-	protocol_id_t protocol;
-	u_int32_t spi;
-	child_sa_t *to_delete;
-
-	if (message->get_notify(message, NO_ADDITIONAL_SAS))
-	{
-		DBG1(DBG_IKE, "peer seems to not support CHILD_SA rekeying, "
-			 "starting reauthentication");
-		this->child_sa->set_state(this->child_sa, CHILD_INSTALLED);
-		lib->processor->queue_job(lib->processor,
-				(job_t*)rekey_ike_sa_job_create(
-							this->ike_sa->get_id(this->ike_sa), TRUE));
-		return SUCCESS;
-	}
-
-	if (this->child_create->task.process(&this->child_create->task,
-										 message) == NEED_MORE)
-	{
-		/* bad DH group while rekeying, try again */
-		this->child_create->task.migrate(&this->child_create->task, this->ike_sa);
-		return NEED_MORE;
-	}
-	if (message->get_payload(message, SECURITY_ASSOCIATION) == NULL)
-	{
-		/* establishing new child failed, reuse old. but not when we
-		 * received a delete in the meantime */
-		if (!(this->collision &&
-			  this->collision->get_type(this->collision) == CHILD_DELETE))
-		{
-			job_t *job;
-			u_int32_t retry = RETRY_INTERVAL - (random() % RETRY_JITTER);
-
-			job = (job_t*)rekey_child_sa_job_create(
-								this->child_sa->get_reqid(this->child_sa),
-								this->child_sa->get_protocol(this->child_sa),
-								this->child_sa->get_spi(this->child_sa, TRUE));
-			DBG1(DBG_IKE, "CHILD_SA rekeying failed, "
-								"trying again in %d seconds", retry);
-			this->child_sa->set_state(this->child_sa, CHILD_INSTALLED);
-			lib->scheduler->schedule_job(lib->scheduler, job, retry);
-		}
-		return SUCCESS;
-	}
-
-	/* check for rekey collisions */
-	if (this->collision)
-	{
-		to_delete = handle_collision(this);
-	}
-	else
-	{
-		to_delete = this->child_sa;
-	}
-
-	if (to_delete != this->child_create->get_child(this->child_create))
-	{	/* invoke rekey hook if rekeying successful */
-		charon->bus->child_rekey(charon->bus, this->child_sa,
-							this->child_create->get_child(this->child_create));
-	}
-
-	if (to_delete == NULL)
-	{
-		return SUCCESS;
-	}
-	spi = to_delete->get_spi(to_delete, TRUE);
-	protocol = to_delete->get_protocol(to_delete);
-
-	/* rekeying done, delete the obsolete CHILD_SA using a subtask */
-	this->child_delete = child_delete_create(this->ike_sa, protocol, spi);
-	this->public.task.build = (status_t(*)(task_t*,message_t*))build_i_delete;
-	this->public.task.process = (status_t(*)(task_t*,message_t*))process_i_delete;
-
-	return NEED_MORE;
-}
-
-METHOD(task_t, get_type, task_type_t,
-	private_child_rekey_t *this)
-{
-	return CHILD_REKEY;
-}
-
-METHOD(child_rekey_t, collide, void,
-	private_child_rekey_t *this, task_t *other)
-{
-	/* the task manager only detects exchange collision, but not if
-	 * the collision is for the same child. we check it here. */
-	if (other->get_type(other) == CHILD_REKEY)
-	{
-		private_child_rekey_t *rekey = (private_child_rekey_t*)other;
-		if (rekey->child_sa != this->child_sa)
-		{
-			/* not the same child => no collision */
-			other->destroy(other);
-			return;
-		}
-	}
-	else if (other->get_type(other) == CHILD_DELETE)
-	{
-		child_delete_t *del = (child_delete_t*)other;
-		if (del->get_child(del) == this->child_create->get_child(this->child_create))
-		{
-			/* peer deletes redundant child created in collision */
-			this->other_child_destroyed = TRUE;
-			other->destroy(other);
-			return;
-		}
-		if (del->get_child(del) != this->child_sa)
-		{
-			/* not the same child => no collision */
-			other->destroy(other);
-			return;
-		}
-	}
-	else
-	{
-		/* any other task is not critical for collisisions, ignore */
-		other->destroy(other);
-		return;
-	}
-	DBG1(DBG_IKE, "detected %N collision with %N", task_type_names, CHILD_REKEY,
-		 task_type_names, other->get_type(other));
-	DESTROY_IF(this->collision);
-	this->collision = other;
-}
-
-METHOD(task_t, migrate, void,
-	private_child_rekey_t *this, ike_sa_t *ike_sa)
-{
-	if (this->child_create)
-	{
-		this->child_create->task.migrate(&this->child_create->task, ike_sa);
-	}
-	if (this->child_delete)
-	{
-		this->child_delete->task.migrate(&this->child_delete->task, ike_sa);
-	}
-	DESTROY_IF(this->collision);
-
-	this->ike_sa = ike_sa;
-	this->collision = NULL;
-}
-
-METHOD(task_t, destroy, void,
-	private_child_rekey_t *this)
-{
-	if (this->child_create)
-	{
-		this->child_create->task.destroy(&this->child_create->task);
-	}
-	if (this->child_delete)
-	{
-		this->child_delete->task.destroy(&this->child_delete->task);
-	}
-	DESTROY_IF(this->collision);
-	free(this);
-}
-
-/*
- * Described in header.
- */
-child_rekey_t *child_rekey_create(ike_sa_t *ike_sa, protocol_id_t protocol,
-								  u_int32_t spi)
-{
-	private_child_rekey_t *this;
-
-	INIT(this,
-		.public = {
-			.task = {
-				.get_type = _get_type,
-				.migrate = _migrate,
-				.destroy = _destroy,
-			},
-			.collide = _collide,
-		},
-		.ike_sa = ike_sa,
-		.protocol = protocol,
-		.spi = spi,
-	);
- 
-	if (protocol != PROTO_NONE)
-	{
-		this->public.task.build = _build_i;
-		this->public.task.process = _process_i;
-		this->initiator = TRUE;
-		this->child_create = NULL;
-	}
-	else
-	{
-		this->public.task.build = _build_r;
-		this->public.task.process = _process_r;
-		this->initiator = FALSE;
-		this->child_create = child_create_create(ike_sa, NULL, TRUE, NULL, NULL);
-	}
-
-	return &this->public;
-}