+ else {
+ // otherwise, forward the request to the closest preceding finger in my table
+ int closest = closest_preceding_node(node, task_data->request_id);
+ XBT_DEBUG("Forwarding the 'Find Successor' request for id %d to my closest preceding finger %d",
+ task_data->request_id, closest);
+ get_mailbox(closest, mailbox);
+ MSG_task_dsend(task, mailbox, task_free);
+ }
+ break;
+
+ case TASK_GET_PREDECESSOR:
+ XBT_DEBUG("Receiving a 'Get Predecessor' request from %s", task_data->issuer_host_name);
+ task_data->type = TASK_GET_PREDECESSOR_ANSWER;
+ task_data->answer_id = node->pred_id;
+ XBT_DEBUG("Sending back a 'Get Predecessor Answer' to %s via mailbox '%s': my predecessor is %d",
+ task_data->issuer_host_name,
+ task_data->answer_to, task_data->answer_id);
+ MSG_task_dsend(task, task_data->answer_to, task_free);
+ break;
+
+ case TASK_NOTIFY:
+ // someone is telling me that he may be my new predecessor
+ XBT_DEBUG("Receiving a 'Notify' request from %s", task_data->issuer_host_name);
+ notify(node, task_data->request_id);
+ task_free(task);
+ break;
+
+ case TASK_PREDECESSOR_LEAVING:
+ // my predecessor is about to quit
+ XBT_DEBUG("Receiving a 'Predecessor Leaving' message from %s", task_data->issuer_host_name);
+ // modify my predecessor
+ set_predecessor(node, task_data->request_id);
+ task_free(task);
+ /*TODO :
+ >> notify my new predecessor
+ >> send a notify_predecessors !!
+ */
+ break;
+
+ case TASK_SUCCESSOR_LEAVING:
+ // my successor is about to quit
+ XBT_DEBUG("Receiving a 'Successor Leaving' message from %s", task_data->issuer_host_name);
+ // modify my successor FIXME : this should be implicit ?
+ set_finger(node, 0, task_data->request_id);
+ task_free(task);
+ /* TODO
+ >> notify my new successor
+ >> update my table & predecessors table */
+ break;
+
+ case TASK_FIND_SUCCESSOR_ANSWER:
+ case TASK_GET_PREDECESSOR_ANSWER:
+ case TASK_PREDECESSOR_ALIVE_ANSWER:
+ XBT_DEBUG("Ignoring unexpected task of type %d (%p)", (int)type, task);
+ task_free(task);
+ break;
+
+ case TASK_PREDECESSOR_ALIVE:
+ XBT_DEBUG("Receiving a 'Predecessor Alive' request from %s", task_data->issuer_host_name);
+ task_data->type = TASK_PREDECESSOR_ALIVE_ANSWER;
+ XBT_DEBUG("Sending back a 'Predecessor Alive Answer' to %s (mailbox %s)",
+ task_data->issuer_host_name,
+ task_data->answer_to);
+ MSG_task_dsend(task, task_data->answer_to, task_free);
+ break;
+
+ default:
+ THROW_IMPOSSIBLE;