/*

 * Copyright (C) 2008 Andreas Steffen

 *

 * Copyright (C) secunet Security Networks 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 "migrate_job.h"

#include <daemon.h>

#include <config/child_cfg.h>

typedef struct private_migrate_job_t private_migrate_job_t;

/**

 * Private data of a migrate_job_t object.

 */

struct private_migrate_job_t {

  /**

   * Public migrate_job_t interface.

   */

  migrate_job_t public;

  /**

   * reqid of the CHILD_SA if it already exists

   */

  uint32_t reqid;

  /**

   * source traffic selector

   */

  traffic_selector_t *src_ts;

  /**

   * destination traffic selector

   */

  traffic_selector_t *dst_ts;

  /**

   * local host address to be used for IKE

   */

  host_t *local;

  /**

   * remote host address to be used for IKE

   */

  host_t *remote;

};

METHOD(job_t, destroy, void,

  private_migrate_job_t *this)

{

  DESTROY_IF(this->src_ts);

  DESTROY_IF(this->dst_ts);

  DESTROY_IF(this->local);

  DESTROY_IF(this->remote);

  free(this);

}

METHOD(job_t, execute, job_requeue_t,

  private_migrate_job_t *this)

{

  enumerator_t *ike_sas, *children;

  ike_sa_t *ike_sa;

  ike_sas = charon->ike_sa_manager->create_enumerator(charon->ike_sa_manager,

                            TRUE);

  while (ike_sas->enumerate(ike_sas, &ike_sa))

  {

    child_sa_t *current, *child_sa = NULL;

    linked_list_t *vips;

    status_t status;

    host_t *host;

    children = ike_sa->create_child_sa_enumerator(ike_sa);

    while (children->enumerate(children, &current))

    {

      if (current->get_reqid(current) == this->reqid)

      {

        child_sa = current;

        break;

      }

    }

    children->destroy(children);

    if (!child_sa)

    {

      continue;

    }

    DBG2(DBG_JOB, "found CHILD_SA with reqid {%u}", this->reqid);

    ike_sa->set_kmaddress(ike_sa, this->local, this->remote);

    host = this->local->clone(this->local);

    host->set_port(host, charon->socket->get_port(charon->socket, FALSE));

    ike_sa->set_my_host(ike_sa, host);

    host = this->remote->clone(this->remote);

    host->set_port(host, IKEV2_UDP_PORT);

    ike_sa->set_other_host(ike_sa, host);

    vips = linked_list_create_from_enumerator(

              ike_sa->create_virtual_ip_enumerator(ike_sa, TRUE));

    status = child_sa->update(child_sa, this->local, this->remote, vips,

                  ike_sa->has_condition(ike_sa, COND_NAT_ANY));

    switch (status)

    {

      case NOT_SUPPORTED:

        ike_sa->rekey_child_sa(ike_sa, child_sa->get_protocol(child_sa),

                     child_sa->get_spi(child_sa, TRUE));

        break;

      case SUCCESS:

        charon->child_sa_manager->remove(charon->child_sa_manager,

                         child_sa);

        charon->child_sa_manager->add(charon->child_sa_manager,

                        child_sa, ike_sa);

      default:

        break;

    }

    vips->destroy(vips);

  }

  ike_sas->destroy(ike_sas);

  return JOB_REQUEUE_NONE;

}

METHOD(job_t, get_priority, job_priority_t,

  private_migrate_job_t *this)

{

  return JOB_PRIO_MEDIUM;

}

/*

 * Described in header

 */

migrate_job_t *migrate_job_create(uint32_t reqid,

                  traffic_selector_t *src_ts,

                  traffic_selector_t *dst_ts,

                  policy_dir_t dir,

                  host_t *local, host_t *remote)

{

  private_migrate_job_t *this;

  INIT(this,

    .public = {

      .job_interface = {

        .execute = _execute,

        .get_priority = _get_priority,

        .destroy = _destroy,

      },

    },

    .reqid = reqid,

    .src_ts = (dir == POLICY_OUT) ? src_ts : dst_ts,

    .dst_ts = (dir == POLICY_OUT) ? dst_ts : src_ts,

    .local = local,

    .remote = remote,

  );

  return &this->public;

}