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, void,
  55         private_inactivity_job_t *this)
  56 {
  57         ike_sa_t *ike_sa;
  58         bool rescheduled = FALSE;
  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                 iterator_t *iterator;
  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                 iterator = ike_sa->create_child_sa_iterator(ike_sa);
  72                 while (iterator->iterate(iterator, (void**)&child_sa))
  73                 {
  74                         if (child_sa->get_reqid(child_sa) == this->reqid)
  75                         {
  76                                 time_t in, out, diff;
  77
  78                                 child_sa->get_usestats(child_sa, TRUE, &in, NULL);
  79                                 child_sa->get_usestats(child_sa, FALSE, &out, NULL);
  80
  81                                 diff = time_monotonic(NULL) - max(in, out);
  82
  83                                 if (diff >= this->timeout)
  84                                 {
  85                                         delete = child_sa->get_spi(child_sa, TRUE);
  86                                         proto = child_sa->get_protocol(child_sa);
  87                                 }
  88                                 else
  89                                 {
  90                                         lib->scheduler->schedule_job(lib->scheduler,
  91                                                         &this->public.job_interface, this->timeout - diff);
  92                                         rescheduled = TRUE;
  93                                 }
  94                         }
  95                         children++;
  96                 }
  97                 iterator->destroy(iterator);
  98
  99                 if (delete)
 100                 {
 101                         if (children == 1 && this->close_ike)
 102                         {
 103                                 DBG1(DBG_JOB, "deleting IKE_SA after %d seconds "
 104                                          "of CHILD_SA inactivity", this->timeout);
 105                                 status = ike_sa->delete(ike_sa);
 106                         }
 107                         else
 108                         {
 109                                 DBG1(DBG_JOB, "deleting CHILD_SA after %d seconds "
 110                                          "of inactivity", this->timeout);
 111                                 status = ike_sa->delete_child_sa(ike_sa, proto, delete);
 112                         }
 113                 }
 114                 if (status == DESTROY_ME)
 115                 {
 116                         charon->ike_sa_manager->checkin_and_destroy(charon->ike_sa_manager,
 117                                                                                                                 ike_sa);
 118                 }
 119                 else
 120                 {
 121                         charon->ike_sa_manager->checkin(charon->ike_sa_manager, ike_sa);
 122                 }
 123         }
 124         if (!rescheduled)
 125         {
 126                 destroy(this);
 127         }
 128 }
 129
 130 /**
 131  * See header
 132  */
 133 inactivity_job_t *inactivity_job_create(u_int32_t reqid, u_int32_t timeout,
 134                                                                                 bool close_ike)
 135 {
 136         private_inactivity_job_t *this;
 137
 138         INIT(this,
 139                 .public = {
 140                                 .job_interface = {
 141                                 .execute = _execute,
 142                                 .destroy = _destroy,
 143                         },
 144                 },
 145                 .reqid = reqid,
 146                 .timeout = timeout,
 147                 .close_ike = close_ike,
 148         );
 149
 150         return &this->public;
 151 }
 152