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 <hydra.h>
  19 #include <daemon.h>
  20
  21 typedef struct private_inactivity_job_t private_inactivity_job_t;
  22
  23 /**
  24  * Private data of an inactivity_job_t object.
  25  */
  26 struct private_inactivity_job_t {
  27
  28         /**
  29          * Public inactivity_job_t interface.
  30          */
  31         inactivity_job_t public;
  32
  33         /**
  34          * Reqid of CHILD_SA to check
  35          */
  36         u_int32_t reqid;
  37
  38         /**
  39          * Inactivity timeout
  40          */
  41         u_int32_t timeout;
  42
  43         /**
  44          * Close IKE_SA if last remaining CHILD inactive?
  45          */
  46         bool close_ike;
  47 };
  48
  49 METHOD(job_t, destroy, void,
  50         private_inactivity_job_t *this)
  51 {
  52         free(this);
  53 }
  54
  55 METHOD(job_t, execute, void,
  56         private_inactivity_job_t *this)
  57 {
  58         ike_sa_t *ike_sa;
  59         bool rescheduled = FALSE;
  60
  61         ike_sa = charon->ike_sa_manager->checkout_by_id(charon->ike_sa_manager,
  62                                                                                                         this->reqid, TRUE);
  63         if (ike_sa)
  64         {
  65                 iterator_t *iterator;
  66                 child_sa_t *child_sa;
  67                 u_int32_t delete = 0;
  68                 protocol_id_t proto = 0;
  69                 int children = 0;
  70                 status_t status = SUCCESS;
  71
  72                 iterator = ike_sa->create_child_sa_iterator(ike_sa);
  73                 while (iterator->iterate(iterator, (void**)&child_sa))
  74                 {
  75                         if (child_sa->get_reqid(child_sa) == this->reqid)
  76                         {
  77                                 time_t in, out, diff;
  78
  79                                 child_sa->get_usestats(child_sa, TRUE, &in, NULL);
  80                                 child_sa->get_usestats(child_sa, FALSE, &out, NULL);
  81
  82                                 diff = time_monotonic(NULL) - max(in, out);
  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                                         hydra->scheduler->schedule_job(hydra->scheduler,
  92                                                         &this->public.job_interface, this->timeout - diff);
  93                                         rescheduled = TRUE;
  94                                 }
  95                         }
  96                         children++;
  97                 }
  98                 iterator->destroy(iterator);
  99
 100                 if (delete)
 101                 {
 102                         if (children == 1 && this->close_ike)
 103                         {
 104                                 DBG1(DBG_JOB, "deleting IKE_SA after %d seconds "
 105                                          "of CHILD_SA inactivity", this->timeout);
 106                                 status = ike_sa->delete(ike_sa);
 107                         }
 108                         else
 109                         {
 110                                 DBG1(DBG_JOB, "deleting CHILD_SA after %d seconds "
 111                                          "of inactivity", this->timeout);
 112                                 status = ike_sa->delete_child_sa(ike_sa, proto, delete);
 113                         }
 114                 }
 115                 if (status == DESTROY_ME)
 116                 {
 117                         charon->ike_sa_manager->checkin_and_destroy(charon->ike_sa_manager,
 118                                                                                                                 ike_sa);
 119                 }
 120                 else
 121                 {
 122                         charon->ike_sa_manager->checkin(charon->ike_sa_manager, ike_sa);
 123                 }
 124         }
 125         if (!rescheduled)
 126         {
 127                 destroy(this);
 128         }
 129 }
 130
 131 /**
 132  * See header
 133  */
 134 inactivity_job_t *inactivity_job_create(u_int32_t reqid, u_int32_t timeout,
 135                                                                                 bool close_ike)
 136 {
 137         private_inactivity_job_t *this;
 138
 139         INIT(this,
 140                 .public = {
 141                                 .job_interface = {
 142                                 .execute = _execute,
 143                                 .destroy = _destroy,
 144                         },
 145                 },
 146                 .reqid = reqid,
 147                 .timeout = timeout,
 148                 .close_ike = close_ike,
 149         );
 150
 151         return &this->public;
 152 }
 153