/* Main loop for the process */
static void main_loop(node_t node, double deadline)
{
- double next_lookup_time = MSG_get_clock() + random_lookup_interval;
+ double next_lookup_time = MSG_get_clock() + RANDOM_LOOKUP_INTERVAL;
XBT_VERB("Main loop start");
while (MSG_get_clock() < deadline) {
/* We search for a pseudo random node */
if (MSG_get_clock() >= next_lookup_time) {
random_lookup(node);
- next_lookup_time += random_lookup_interval;
+ next_lookup_time += RANDOM_LOOKUP_INTERVAL;
} else {
//Didn't get a task: sleep for a while...
MSG_process_sleep(1);
*/
unsigned int join(node_t node, unsigned int id_known)
{
- answer_t node_list;
+ const s_answer_t* node_list;
msg_error_t status;
unsigned int trial = 0;
unsigned int i;
XBT_DEBUG("Received an answer from the node I know.");
answer_got = 1;
//retrieve the node list and ping them.
- task_data_t data = MSG_task_get_data(node->task_received);
+ const s_task_data_t* data = MSG_task_get_data(node->task_received);
xbt_assert((data != NULL), "Null data received");
if (data->type == TASK_FIND_NODE_ANSWER) {
node_contact_t contact;
} else {
MSG_process_sleep(1);
}
- } while (answer_got == 0 && trial < max_join_trials);
+ } while (answer_got == 0 && trial < MAX_JOIN_TRIALS);
/* Second step: Send a FIND_NODE to a a random node in buckets */
unsigned int bucket_id = routing_table_find_bucket(node->table, id_known)->id;
- for (i = 0; ((bucket_id > i) || (bucket_id + i) <= identifier_size) && i < JOIN_BUCKETS_QUERIES; i++) {
+ for (i = 0; ((bucket_id > i) || (bucket_id + i) <= IDENTIFIER_SIZE) && i < JOIN_BUCKETS_QUERIES; i++) {
if (bucket_id > i) {
unsigned int id_in_bucket = get_id_in_prefix(node->id, bucket_id - i);
find_node(node, id_in_bucket, 0);
}
- if (bucket_id + i <= identifier_size) {
+ if (bucket_id + i <= IDENTIFIER_SIZE) {
unsigned int id_in_bucket = get_id_in_prefix(node->id, bucket_id + i);
find_node(node, id_in_bucket, 0);
}
unsigned int answers;
unsigned int destination_found = 0;
unsigned int nodes_added = 0;
- double global_timeout = MSG_get_clock() + find_node_global_timeout;
+ double global_timeout = MSG_get_clock() + FIND_NODE_GLOBAL_TIMEOUT;
unsigned int steps = 0;
/* First we build a list of who we already know */
answers = 0;
queries = send_find_node_to_best(node, node_list);
nodes_added = 0;
- double timeout = MSG_get_clock() + find_node_timeout;
+ double timeout = MSG_get_clock() + FIND_NODE_TIMEOUT;
steps++;
double time_beginreceive = MSG_get_clock();
do {
if (status == MSG_OK) {
xbt_assert((node->task_received != NULL), "Invalid task received");
//Figure out if we received an answer or something else
- task_data_t data = MSG_task_get_data(node->task_received);
+ const s_task_data_t* data = MSG_task_get_data(node->task_received);
xbt_assert((data != NULL), "No data in the task");
//Check if what we have received is what we are looking for.
return destination_found;
}
-/** @brief Pings a node in the system to see if it is online.
- * @param node Our node data
- * @param id_to_ping the id of a node we want to see if it is online.
- * @return if the ping succeded or not.
- */
-unsigned int ping(node_t node, unsigned int id_to_ping)
-{
- char mailbox[MAILBOX_NAME_SIZE];
- snprintf(mailbox, MAILBOX_NAME_SIZE, "%u", id_to_ping);
-
- double timeout = MSG_get_clock() + ping_timeout;
-
- msg_task_t ping_task = task_new_ping(node->id, node->mailbox, MSG_host_get_name(MSG_host_self()));
- msg_task_t task_received = NULL;
-
- XBT_VERB("PING %08x", id_to_ping);
-
- //Check that we aren't trying to ping ourselves
- if (id_to_ping == node->id) {
- return 1;
- }
-
- /* Sending the ping task */
- MSG_task_dsend(ping_task, mailbox, task_free_v);
- do {
- task_received = NULL;
- msg_error_t status =
- MSG_task_receive_with_timeout(&task_received, node->mailbox, ping_timeout);
- if (status == MSG_OK) {
- xbt_assert((task_received != NULL), "Invalid task received");
- //Checking if it's what we are waiting for or not.
- task_data_t data = MSG_task_get_data(task_received);
- xbt_assert((data != NULL), "didn't receive any data...");
- if (data->type == TASK_PING_ANSWER && id_to_ping == data->sender_id) {
- XBT_VERB("Ping to %s succeeded", mailbox);
- node_routing_table_update(node, data->sender_id);
- task_free(task_received);
- return 1; // Destination found, ping succeeded!
- } else {
- //If it's not our answer, we answer the query anyway.
- handle_task(node, task_received);
- }
- }
- } while (MSG_get_clock() < timeout);
-
- if (MSG_get_clock() >= timeout) {
- XBT_DEBUG("Ping to %s has timeout.", mailbox);
- return 0;
- }
- XBT_DEBUG("It seems that %s is offline...", mailbox);
- return -1;
-}
-
/** @brief Does a pseudo-random lookup for someone in the system
* @param node caller node data
*/
void random_lookup(node_t node)
{
unsigned int id_to_look = RANDOM_LOOKUP_NODE; //Totally random.
- /* TODO: Use some pseudorandom generator like RngStream. */
+ /* TODO: Use some pseudorandom generator. */
XBT_DEBUG("I'm doing a random lookup");
find_node(node, id_to_look, 1);
}
}
/**
- * Sends to the best "kademlia_alpha" nodes in the "node_list" array a "FIND_NODE" request, to ask them for their best nodes
+ * Sends to the best "KADEMLIA_ALPHA" nodes in the "node_list" array a "FIND_NODE" request, to ask them for their best
+ * nodes
*/
unsigned int send_find_node_to_best(node_t node, answer_t node_list)
{
unsigned int i = 0;
unsigned int j = 0;
unsigned int destination = node_list->destination_id;
- while (j < kademlia_alpha && i < node_list->size) {
- /* We need to have at most "kademlia_alpha" requests each time, according to the protocol */
+ while (j < KADEMLIA_ALPHA && i < node_list->size) {
+ /* We need to have at most "KADEMLIA_ALPHA" requests each time, according to the protocol */
/* Gets the node we want to send the query to */
- node_contact_t node_to_query = xbt_dynar_get_as(node_list->nodes, i, node_contact_t);
+ const s_node_contact_t* node_to_query = xbt_dynar_get_as(node_list->nodes, i, node_contact_t);
if (node_to_query->id != node->id) { /* No need to query ourselves */
send_find_node(node, node_to_query->id, destination);
j++;
case TASK_FIND_NODE_ANSWER:
XBT_DEBUG("Received a wrong answer for a FIND_NODE");
break;
- case TASK_PING:
- handle_ping(node, data);
- break;
default:
break;
}
MSG_task_dsend(task, data->answer_to, task_free_v);
}
-/** @brief handles the answer to a ping */
-void handle_ping(node_t node, task_data_t data)
-{
- XBT_VERB("Received a PING request from %s (%s)", data->answer_to, data->issuer_host_name);
- //Building the answer to the request
- msg_task_t task = task_new_ping_answer(node->id, data->answer_to, MSG_host_get_name(MSG_host_self()));
-
- MSG_task_dsend(task, data->answer_to, task_free_v);
-}
-
/** @brief Main function */
int main(int argc, char *argv[])
{
