Implemented first two exchanges of Main Mode as initiator
[strongswan.git] / src / libcharon / sa / task_manager_v1.c
index 7eb81fc..99263aa 100644 (file)
@@ -154,10 +154,155 @@ METHOD(task_manager_t, retransmit, status_t,
        return FAILED;
 }
 
+/**
+ * move a task of a specific type from the queue to the active list
+ */
+static bool activate_task(private_task_manager_t *this, task_type_t type)
+{
+       enumerator_t *enumerator;
+       task_t *task;
+       bool found = FALSE;
+
+       enumerator = this->queued_tasks->create_enumerator(this->queued_tasks);
+       while (enumerator->enumerate(enumerator, (void**)&task))
+       {
+               if (task->get_type(task) == type)
+               {
+                       DBG2(DBG_IKE, "  activating %N task", task_type_names, type);
+                       this->queued_tasks->remove_at(this->queued_tasks, enumerator);
+                       this->active_tasks->insert_last(this->active_tasks, task);
+                       found = TRUE;
+                       break;
+               }
+       }
+       enumerator->destroy(enumerator);
+       return found;
+}
+
 METHOD(task_manager_t, initiate, status_t,
        private_task_manager_t *this)
 {
-       return FAILED;
+       enumerator_t *enumerator;
+       task_t *task;
+       message_t *message;
+       host_t *me, *other;
+       status_t status;
+       exchange_type_t exchange = 0;
+
+       if (this->initiating.type != EXCHANGE_TYPE_UNDEFINED)
+       {
+               DBG2(DBG_IKE, "delaying task initiation, %N exchange in progress",
+                               exchange_type_names, this->initiating.type);
+               /* do not initiate if we already have a message in the air */
+               return SUCCESS;
+       }
+
+       if (this->active_tasks->get_count(this->active_tasks) == 0)
+       {
+               DBG2(DBG_IKE, "activating new tasks");
+               switch (this->ike_sa->get_state(this->ike_sa))
+               {
+                       case IKE_CREATED:
+                               if (activate_task(this, MAIN_MODE))
+                               {
+                                       exchange = ID_PROT;
+                               }
+                               break;
+                       default:
+                               break;
+               }
+       }
+       else
+       {
+               DBG2(DBG_IKE, "reinitiating already active tasks");
+               enumerator = this->active_tasks->create_enumerator(this->active_tasks);
+               while (enumerator->enumerate(enumerator, (void**)&task))
+               {
+                       DBG2(DBG_IKE, "  %N task", task_type_names, task->get_type(task));
+                       switch (task->get_type(task))
+                       {
+                               case MAIN_MODE:
+                                       exchange = ID_PROT;
+                                       break;
+                               default:
+                                       continue;
+                       }
+                       break;
+               }
+               enumerator->destroy(enumerator);
+       }
+
+       if (exchange == 0)
+       {
+               DBG2(DBG_IKE, "nothing to initiate");
+               /* nothing to do yet... */
+               return SUCCESS;
+       }
+
+       me = this->ike_sa->get_my_host(this->ike_sa);
+       other = this->ike_sa->get_other_host(this->ike_sa);
+
+       message = message_create(IKEV1_MAJOR_VERSION, IKEV1_MINOR_VERSION);
+       if (exchange != ID_PROT)
+       {
+               /* TODO-IKEv1: Set random message id */
+       }
+       message->set_source(message, me->clone(me));
+       message->set_destination(message, other->clone(other));
+       message->set_exchange_type(message, exchange);
+       this->initiating.type = exchange;
+       this->initiating.retransmitted = 0;
+
+       enumerator = this->active_tasks->create_enumerator(this->active_tasks);
+       while (enumerator->enumerate(enumerator, (void*)&task))
+       {
+               switch (task->build(task, message))
+               {
+                       case SUCCESS:
+                               /* task completed, remove it */
+                               this->active_tasks->remove_at(this->active_tasks, enumerator);
+                               task->destroy(task);
+                               break;
+                       case NEED_MORE:
+                               /* processed, but task needs another exchange */
+                               break;
+                       case FAILED:
+                       default:
+                               if (this->ike_sa->get_state(this->ike_sa) != IKE_CONNECTING)
+                               {
+                                       charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
+                               }
+                               /* FALL */
+                       case DESTROY_ME:
+                               /* critical failure, destroy IKE_SA */
+                               enumerator->destroy(enumerator);
+                               message->destroy(message);
+                               flush(this);
+                               return DESTROY_ME;
+               }
+       }
+       enumerator->destroy(enumerator);
+
+       /* update exchange type if a task changed it */
+       this->initiating.type = message->get_exchange_type(message);
+
+       status = this->ike_sa->generate_message(this->ike_sa, message,
+                                                                                       &this->initiating.packet);
+       if (status != SUCCESS)
+       {
+               /* message generation failed. There is nothing more to do than to
+                * close the SA */
+               message->destroy(message);
+               flush(this);
+               charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
+               return DESTROY_ME;
+       }
+       message->destroy(message);
+
+       charon->sender->send(charon->sender,
+                               this->initiating.packet->clone(this->initiating.packet));
+
+       return SUCCESS;
 }
 
 /**
@@ -310,11 +455,62 @@ static status_t process_request(private_task_manager_t *this,
        return build_response(this, message);
 }
 
+/**
+ * handle an incoming response message
+ */
+static status_t process_response(private_task_manager_t *this,
+                                                                message_t *message)
+{
+       enumerator_t *enumerator;
+       task_t *task;
+
+       if (message->get_exchange_type(message) != this->initiating.type)
+       {
+               DBG1(DBG_IKE, "received %N response, but expected %N",
+                        exchange_type_names, message->get_exchange_type(message),
+                        exchange_type_names, this->initiating.type);
+               charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
+               return DESTROY_ME;
+       }
+
+       enumerator = this->active_tasks->create_enumerator(this->active_tasks);
+       while (enumerator->enumerate(enumerator, (void*)&task))
+       {
+               switch (task->process(task, message))
+               {
+                       case SUCCESS:
+                               /* task completed, remove it */
+                               this->active_tasks->remove_at(this->active_tasks, enumerator);
+                               task->destroy(task);
+                               break;
+                       case NEED_MORE:
+                               /* processed, but task needs another exchange */
+                               break;
+                       case FAILED:
+                       default:
+                               charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
+                               /* FALL */
+                       case DESTROY_ME:
+                               /* critical failure, destroy IKE_SA */
+                               this->active_tasks->remove_at(this->active_tasks, enumerator);
+                               enumerator->destroy(enumerator);
+                               task->destroy(task);
+                               return DESTROY_ME;
+               }
+       }
+       enumerator->destroy(enumerator);
+
+       this->initiating.type = EXCHANGE_TYPE_UNDEFINED;
+       this->initiating.packet->destroy(this->initiating.packet);
+       this->initiating.packet = NULL;
+
+       return initiate(this);
+}
+
 METHOD(task_manager_t, process_message, status_t,
        private_task_manager_t *this, message_t *msg)
 {
-       /* TODO-IKEv1: detect request/response */
-       if (TRUE)
+       if (this->active_tasks->get_count(this->active_tasks) == 0)
        {
                /* TODO-IKEv1: detect mainmode retransmission */
                charon->bus->message(charon->bus, msg, TRUE);
@@ -326,8 +522,12 @@ METHOD(task_manager_t, process_message, status_t,
        }
        else
        {
-               /* TODO-IKEv1: handle response */
-               return DESTROY_ME;
+               charon->bus->message(charon->bus, msg, FALSE);
+               if (process_response(this, msg) != SUCCESS)
+               {
+                       flush(this);
+                       return DESTROY_ME;
+               }
        }
        return SUCCESS;
 }