ikev2: Immediately initiate queued tasks after establishing rekeyed IKE_SA

If additional tasks get queued before/while rekeying an IKE_SA, these get
migrated to the new IKE_SA. We previously did not trigger initiation of these
tasks, though, leaving the task unexecuted until a new task gets queued.

src/libcharon/processing/jobs/initiate_tasks_job.c

@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2015 Martin Willi
+ * Copyright (C) 2015 revosec AG
+ *
+ * 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 <stdlib.h>
+
+#include "initiate_tasks_job.h"
+
+#include <sa/ike_sa.h>
+#include <daemon.h>
+
+
+typedef struct private_initiate_tasks_job_t private_initiate_tasks_job_t;
+
+/**
+ * Private data of an initiate_tasks_job_t Object
+ */
+struct private_initiate_tasks_job_t {
+
+	/**
+	 * Public initiate_tasks_job_t interface
+	 */
+	initiate_tasks_job_t public;
+
+	/**
+	 * ID of the IKE_SA to trigger task initiation
+	 */
+	ike_sa_id_t *ike_sa_id;
+};
+
+METHOD(job_t, destroy, void,
+	private_initiate_tasks_job_t *this)
+{
+	this->ike_sa_id->destroy(this->ike_sa_id);
+	free(this);
+}
+
+METHOD(job_t, execute, job_requeue_t,
+	private_initiate_tasks_job_t *this)
+{
+	ike_sa_t *ike_sa;
+
+	ike_sa = charon->ike_sa_manager->checkout(charon->ike_sa_manager,
+											  this->ike_sa_id);
+	if (ike_sa)
+	{
+		if (ike_sa->initiate(ike_sa, NULL, 0, NULL, NULL) == DESTROY_ME)
+		{
+			charon->ike_sa_manager->checkin_and_destroy(charon->ike_sa_manager,
+														ike_sa);
+		}
+		else
+		{
+			charon->ike_sa_manager->checkin(charon->ike_sa_manager, ike_sa);
+		}
+	}
+	return JOB_REQUEUE_NONE;
+}
+
+METHOD(job_t, get_priority, job_priority_t,
+	private_initiate_tasks_job_t *this)
+{
+	return JOB_PRIO_MEDIUM;
+}
+
+/*
+ * Described in header
+ */
+initiate_tasks_job_t *initiate_tasks_job_create(ike_sa_id_t *ike_sa_id)
+{
+	private_initiate_tasks_job_t *this;
+
+	INIT(this,
+		.public = {
+			.job_interface = {
+				.execute = _execute,
+				.get_priority = _get_priority,
+				.destroy = _destroy,
+			},
+		},
+		.ike_sa_id = ike_sa_id->clone(ike_sa_id),
+	);
+
+	return &this->public;
+}

src/libcharon/processing/jobs/initiate_tasks_job.h

@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2015 Martin Willi
+ * Copyright (C) 2015 revosec AG
+ *
+ * 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.
+ */
+
+/**
+ * @defgroup initiate_tasks_job initiate_tasks_job
+ * @{ @ingroup cjobs
+ */
+
+#ifndef INITIATE_TASKS_JOB_H_
+#define INITIATE_TASKS_JOB_H_
+
+typedef struct initiate_tasks_job_t initiate_tasks_job_t;
+
+#include <library.h>
+#include <processing/jobs/job.h>
+#include <sa/ike_sa_id.h>
+
+/**
+ * Job triggering initiation of any queued IKE_SA tasks.
+ */
+struct initiate_tasks_job_t {
+
+	/**
+	 * Implements job_t interface
+	 */
+	job_t job_interface;
+};
+
+/**
+ * Creates a job to trigger IKE_SA task initiation.
+ *
+ * @param ike_sa_id		ID of IKE_SA to trigger tasks for (gets cloned)
+ * @return				job instance
+ */
+initiate_tasks_job_t *initiate_tasks_job_create(ike_sa_id_t *ike_sa_id);
+
+#endif /** INITIATE_TASKS_JOB_H_ @}*/