-/* Copyright (c) 2012, 2014-2015. The SimGrid Team.
+/* Copyright (c) 2012, 2014-2016. The SimGrid Team.
* All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* <b>kademlia/kademlia.c: Kademlia protocol</b>
* Implements the Kademlia protocol, using 32 bits identifiers.
*/
-XBT_LOG_NEW_DEFAULT_CATEGORY(msg_kademlia,
- "Messages specific for this msg example");
+XBT_LOG_NEW_DEFAULT_CATEGORY(msg_kademlia, "Messages specific for this msg example");
extern long unsigned int smx_total_comms;
-/**
- * Main loop for the process
- */
+/* Main loop for the process */
static void main_loop(node_t node, double deadline)
{
double next_lookup_time = MSG_get_clock() + random_lookup_interval;
node->receive_comm = NULL;
if (status == MSG_OK) {
- xbt_assert((node->task_received != NULL),
- "We received an incorrect task");
+ xbt_assert((node->task_received != NULL), "We received an incorrect task");
handle_task(node, node->task_received);
} else {
- xbt_assert((MSG_comm_get_task(node->receive_comm) == NULL),
- "Comm failed but received a task.");
+ xbt_assert((MSG_comm_get_task(node->receive_comm) == NULL), "Comm failed but received a task.");
XBT_DEBUG("Nevermind, the communication has failed.");
}
}
}
//Cleanup the receiving communication.
if (node->receive_comm != NULL) {
- if (MSG_comm_test(node->receive_comm)
- && MSG_comm_get_status(node->receive_comm) == MSG_OK) {
+ if (MSG_comm_test(node->receive_comm) && MSG_comm_get_status(node->receive_comm) == MSG_OK) {
task_free(MSG_comm_get_task(node->receive_comm));
}
MSG_comm_destroy(node->receive_comm);
}
}
-/**
- * \brief Node function
- * Arguments :
- * - my node ID
- * - the ID of the person I know in the system (or not)
- * - Time before I leave the system because I'm bored
+/** @brief Node function
+ * @param my node ID
+ * @param the ID of the person I know in the system (or not)
+ * @param Time before I leave the system because I'm bored
*/
static int node(int argc, char *argv[])
{
XBT_INFO("I couldn't join the network :(");
}
XBT_DEBUG("I'm leaving the network");
- XBT_INFO("%d/%d FIND_NODE have succeeded", node->find_node_success,
- node->find_node_success + node->find_node_failed);
+ XBT_INFO("%d/%d FIND_NODE have succeeded", node->find_node_success, node->find_node_success + node->find_node_failed);
node_free(node);
return 0;
}
/**
- * Tries to join the network
+ * @brief Tries to join the network
* @param node node data
* @param id_known id of the node I know in the network.
*/
node_list = data->answer;
xbt_dynar_foreach(node_list->nodes, i, contact) {
node_routing_table_update(node, contact->id);
- //ping(node,contact->id);
}
task_free(node->task_received);
} else {
} 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) > 0 || (bucket_id + i) <= identifier_size)
- && i < JOIN_BUCKETS_QUERIES; i++) {
+ for (i = 0; ((bucket_id - i) > 0 || (bucket_id + i) <= identifier_size) && i < JOIN_BUCKETS_QUERIES; i++) {
if (bucket_id - i > 0) {
unsigned int id_in_bucket = get_id_in_prefix(node->id, bucket_id - i);
find_node(node, id_in_bucket, 0);
return answer_got;
}
-/**
- * Send a request to find a node in the node routing table.
- * @brief node our node data
- * @brief id_to_find the id of the node we are trying to find
+/** @brief Send a request to find a node in the node routing table.
+ * @param node our node data
+ * @param id_to_find the id of the node we are trying to find
*/
-unsigned int find_node(node_t node, unsigned int id_to_find,
- unsigned int count_in_stats)
+unsigned int find_node(node_t node, unsigned int id_to_find, unsigned int count_in_stats)
{
-
unsigned int i = 0;
unsigned int queries, answers;
unsigned int destination_found = 0;
msg_error_t status;
- /* Ask the nodes on our list if they have information about
- * the node we are trying to find */
-
+ /* Ask the nodes on our list if they have information about the node we are trying to find */
do {
answers = 0;
queries = send_find_node_to_best(node, node_list);
do {
if (node->receive_comm == NULL) {
node->task_received = NULL;
- node->receive_comm =
- MSG_task_irecv(&node->task_received, node->mailbox);
+ node->receive_comm = MSG_task_irecv(&node->task_received, node->mailbox);
}
if (node->receive_comm) {
if (MSG_comm_test(node->receive_comm)) {
xbt_assert((data != NULL), "No data in the task");
//Check if what we have received is what we are looking for.
- if (data->type == TASK_FIND_NODE_ANSWER
- && data->answer->destination_id == id_to_find) {
+ if (data->type == TASK_FIND_NODE_ANSWER && data->answer->destination_id == id_to_find) {
//Handle the answer
node_routing_table_update(node, data->sender_id);
node_contact_t contact;
nodes_added = answer_merge(node_list, data->answer);
XBT_DEBUG("Received an answer from %s (%s) with %ld nodes on it",
- data->answer_to, data->issuer_host_name,
- xbt_dynar_length(data->answer->nodes));
+ data->answer_to, data->issuer_host_name, xbt_dynar_length(data->answer->nodes));
task_free(node->task_received);
} else {
}
} while (MSG_get_clock() < timeout && answers < queries);
destination_found = answer_destination_found(node_list);
- } while (!destination_found && (nodes_added > 0 || answers == 0)
- && MSG_get_clock() < global_timeout && steps < MAX_STEPS);
+ } while (!destination_found && (nodes_added > 0 || answers == 0) && MSG_get_clock() < global_timeout
+ && steps < MAX_STEPS);
if (destination_found) {
if (count_in_stats)
node->find_node_success++;
return destination_found;
}
-/**
- * Pings a node in the system to see if it is online.
+/** @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 destination_found = 0;
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 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);
do {
task_received = NULL;
msg_error_t status =
- MSG_task_receive_with_timeout(&task_received, node->mailbox,
- ping_timeout);
+ 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.
return 1;
}
-/**
- * Does a pseudo-random lookup for someone in the system
+/** @brief Does a pseudo-random lookup for someone in the system
* @param node caller node data
*/
void random_lookup(node_t node)
find_node(node, id_to_look, 1);
}
-/**
- * @brief Send a "FIND_NODE" to a node
+/** @brief Send a "FIND_NODE" to a node
* @param node sender node data
* @param id node we are querying
* @param destination node we are trying to find.
/* Gets the mailbox to send to */
get_node_mailbox(id, mailbox);
/* Build the task */
- msg_task_t task =
- task_new_find_node(node->id, destination, node->mailbox,
- MSG_host_get_name(MSG_host_self()));
+ msg_task_t task = task_new_find_node(node->id, destination, node->mailbox, MSG_host_get_name(MSG_host_self()));
/* Send the task */
xbt_assert((task != NULL), "Trying to send a NULL task.");
MSG_task_dsend(task, mailbox, task_free_v);
unsigned int i = 0, j = 0;
unsigned int destination = node_list->destination_id;
node_contact_t node_to_query;
- while (j < kademlia_alpha && i < node_list->size) { /* We need to have at most "kademlia_alpha" requets 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_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 */
return i;
}
-/**
- * \brief Handles an incomming received task
- */
+/** @brief Handles an incoming received task */
void handle_task(node_t node, msg_task_t task)
{
task_data_t data = MSG_task_get_data(task);
handle_ping(node, data);
break;
default:
-
break;
}
task_free(task);
}
-/**
- * \brief Handles the answer to an incomming "find_node" task
- */
+/** @brief Handles the answer to an incoming "find_node" task */
void handle_find_node(node_t node, task_data_t data)
{
XBT_VERB("Received a FIND_NODE from %s (%s), he's trying to find %08x",
//Building the answer to the request
answer_t answer = node_find_closest(node, data->destination_id);
//Building the task to send
- msg_task_t task =
- task_new_find_node_answer(node->id, data->destination_id, answer,
- node->mailbox,
- MSG_host_get_name(MSG_host_self()));
+ msg_task_t task = task_new_find_node_answer(node->id, data->destination_id, answer, node->mailbox,
+ MSG_host_get_name(MSG_host_self()));
//Sending the task
MSG_task_dsend(task, data->answer_to, task_free_v);
}
-/**
- * \brief handles the answer to a ping
- */
+/** @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);
+ 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_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
- */
+/** @brief Main function */
int main(int argc, char *argv[])
{
-
MSG_init(&argc, argv);
/* Check the arguments */
- xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n"
- "\tExample: %s msg_platform.xml msg_deployment.xml\n",
- argv[0], argv[0]);
+ xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n\tExample: %s msg_platform.xml msg_deployment.xml\n",
+ argv[0], argv[0]);
const char *platform_file = argv[1];
const char *deployment_file = argv[2];
MSG_create_environment(platform_file);
-
MSG_function_register("node", node);
MSG_launch_application(deployment_file);
