src/libcharon/processing/jobs/inactivity_job.c

   1 /*
   2  * Copyright (C) 2010 Martin Willi
   3  * Hochschule fuer Technik Rapperswil
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or (at your
   8  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  */
  15
  16 #include "inactivity_job.h"
  17
  18 #include <daemon.h>
  19
  20 typedef struct private_inactivity_job_t private_inactivity_job_t;
  21
  22 /**
  23  * Private data of an inactivity_job_t object.
  24  */
  25 struct private_inactivity_job_t {
  26
  27         /**
  28          * Public inactivity_job_t interface.
  29          */
  30         inactivity_job_t public;
  31
  32         /**
  33          * Reqid of CHILD_SA to check
  34          */
  35         u_int32_t reqid;
  36
  37         /**
  38          * Inactivity timeout
  39          */
  40         u_int32_t timeout;
  41
  42         /**
  43          * Close IKE_SA if last remaining CHILD inactive?
  44          */
  45         bool close_ike;
  46 };
  47
  48 METHOD(job_t, destroy, void,
  49         private_inactivity_job_t *this)
  50 {
  51         free(this);
  52 }
  53
  54 METHOD(job_t, execute, job_requeue_t,
  55         private_inactivity_job_t *this)
  56 {
  57         ike_sa_t *ike_sa;
  58         u_int32_t reschedule = 0;
  59
  60         ike_sa = charon->ike_sa_manager->checkout_by_id(charon->ike_sa_manager,
  61                                                                                                         this->reqid, TRUE);
  62         if (ike_sa)
  63         {
  64                 enumerator_t *enumerator;
  65                 child_sa_t *child_sa;
  66                 u_int32_t delete = 0;
  67                 protocol_id_t proto = 0;
  68                 int children = 0;
  69                 status_t status = SUCCESS;
  70
  71                 enumerator = ike_sa->create_child_sa_enumerator(ike_sa);
  72                 while (enumerator->enumerate(enumerator, (void**)&child_sa))
  73                 {
  74                         if (child_sa->get_reqid(child_sa) == this->reqid)
  75                         {
  76                                 time_t in, out, install, diff;
  77
  78                                 child_sa->get_usestats(child_sa, TRUE, &in, NULL, NULL);
  79                                 child_sa->get_usestats(child_sa, FALSE, &out, NULL, NULL);
  80                                 install = child_sa->get_installtime(child_sa);
  81
  82                                 diff = time_monotonic(NULL) - max(max(in, out), install);
  83
  84                                 if (diff >= this->timeout)
  85                                 {
  86                                         delete = child_sa->get_spi(child_sa, TRUE);
  87                                         proto = child_sa->get_protocol(child_sa);
  88                                 }
  89                                 else
  90                                 {
  91                                         reschedule = this->timeout - diff;
  92                                 }
  93                         }
  94                         children++;
  95                 }
  96                 enumerator->destroy(enumerator);
  97
  98                 if (delete)
  99                 {
 100                         if (children == 1 && this->close_ike)
 101                         {
 102                                 DBG1(DBG_JOB, "deleting IKE_SA after %d seconds "
 103                                          "of CHILD_SA inactivity", this->timeout);
 104                                 status = ike_sa->delete(ike_sa);
 105                         }
 106                         else
 107                         {
 108                                 DBG1(DBG_JOB, "deleting CHILD_SA after %d seconds "
 109                                          "of inactivity", this->timeout);
 110                                 status = ike_sa->delete_child_sa(ike_sa, proto, delete, FALSE);
 111                         }
 112                 }
 113                 if (status == DESTROY_ME)
 114                 {
 115                         charon->ike_sa_manager->checkin_and_destroy(charon->ike_sa_manager,
 116                                                                                                                 ike_sa);
 117                 }
 118                 else
 119                 {
 120                         charon->ike_sa_manager->checkin(charon->ike_sa_manager, ike_sa);
 121                 }
 122         }
 123         if (reschedule)
 124         {
 125                 return JOB_RESCHEDULE(reschedule);
 126         }
 127         return JOB_REQUEUE_NONE;
 128 }
 129
 130 METHOD(job_t, get_priority, job_priority_t,
 131         private_inactivity_job_t *this)
 132 {
 133         return JOB_PRIO_MEDIUM;
 134 }
 135
 136 /**
 137  * See header
 138  */
 139 inactivity_job_t *inactivity_job_create(u_int32_t reqid, u_int32_t timeout,
 140                                                                                 bool close_ike)
 141 {
 142         private_inactivity_job_t *this;
 143
 144         INIT(this,
 145                 .public = {
 146                         .job_interface = {
 147                                 .execute = _execute,
 148                                 .get_priority = _get_priority,
 149                                 .destroy = _destroy,
 150                         },
 151                 },
 152                 .reqid = reqid,
 153                 .timeout = timeout,
 154                 .close_ike = close_ike,
 155         );
 156
 157         return &this->public;
 158 }