#include "conf.h"
#include "connection.h"
#include "devtools.h"
-#include "graph.h"
#include "logger.h"
#include "meshlink_internal.h"
#include "meta.h"
/*
Terminate a connection:
- Mark it as inactive
- - Remove the edge representing this connection
- Kill it with fire
- Check if we need to retry making an outgoing connection
*/
void terminate_connection(meshlink_handle_t *mesh, connection_t *c, bool report) {
+ (void)report;
+
if(c->status.active) {
logger(mesh, MESHLINK_INFO, "Closing connection with %s", c->name);
}
}
c->node->connection = NULL;
+ c->node->status.reachable = false;
+ update_node_status(mesh, c->node);
}
c->status.active = false;
- if(c->edge) {
- if(report) {
- send_del_edge(mesh, mesh->everyone, c->edge, 0);
- }
-
- edge_del(mesh, c->edge);
- c->edge = NULL;
-
- /* Run MST and SSSP algorithms */
-
- graph(mesh);
-
- /* If the node is not reachable anymore but we remember it had an edge to us, clean it up */
-
- if(report && c->node && !c->node->status.reachable) {
- edge_t *e;
- e = lookup_edge(c->node, mesh->self);
-
- if(e) {
- send_del_edge(mesh, mesh->everyone, e, 0);
- edge_del(mesh, e);
- }
- }
- }
-
outgoing_t *outgoing = c->outgoing;
connection_del(mesh, c);
meshlink_handle_t *mesh = loop->data;
logger(mesh, MESHLINK_DEBUG, "timeout_handler()");
- for list_each(connection_t, c, mesh->connections) {
+ for(connection_t *c = mesh->connection; c; c = NULL) {
int pingtimeout = c->node ? mesh->dev_class_traits[c->node->devclass].pingtimeout : default_timeout;
int pinginterval = c->node ? mesh->dev_class_traits[c->node->devclass].pinginterval : default_interval;
}
// Also make sure that if outstanding key requests for the UDP counterpart of a connection has timed out, we restart it.
- if(c->node) {
- if(c->node->status.waitingforkey && c->node->last_req_key + pingtimeout < mesh->loop.now.tv_sec) {
- send_req_key(mesh, c->node);
- }
- }
-
if(c->status.active && c->last_key_renewal + 3600 < mesh->loop.now.tv_sec) {
devtool_sptps_renewal_probe((meshlink_node_t *)c->node);
});
}
-// devclass asc, last_successfull_connection desc
-static int node_compare_devclass_asc_lsc_desc(const void *a, const void *b) {
- const node_t *na = a, *nb = b;
-
- if(na->devclass < nb->devclass) {
- return -1;
- }
-
- if(na->devclass > nb->devclass) {
- return 1;
- }
-
- if(na->last_successfull_connection == nb->last_successfull_connection) {
- return 0;
- }
-
- if(na->last_successfull_connection == 0 || na->last_successfull_connection > nb->last_successfull_connection) {
- return -1;
- }
-
- if(nb->last_successfull_connection == 0 || na->last_successfull_connection < nb->last_successfull_connection) {
- return 1;
- }
-
- if(na < nb) {
- return -1;
- }
-
- if(na > nb) {
- return 1;
- }
-
- return 0;
-}
-
-// last_successfull_connection desc
-static int node_compare_lsc_desc(const void *a, const void *b) {
- const node_t *na = a, *nb = b;
-
- if(na->last_successfull_connection == nb->last_successfull_connection) {
- return 0;
- }
-
- if(na->last_successfull_connection == 0 || na->last_successfull_connection > nb->last_successfull_connection) {
- return -1;
- }
-
- if(nb->last_successfull_connection == 0 || na->last_successfull_connection < nb->last_successfull_connection) {
- return 1;
- }
-
- if(na < nb) {
- return -1;
- }
-
- if(na > nb) {
- return 1;
- }
-
- return 0;
-}
-
-// devclass desc
-static int node_compare_devclass_desc(const void *a, const void *b) {
- const node_t *na = a, *nb = b;
-
- if(na->devclass < nb->devclass) {
- return -1;
- }
-
- if(na->devclass > nb->devclass) {
- return 1;
- }
-
- if(na < nb) {
- return -1;
- }
-
- if(na > nb) {
- return 1;
- }
-
- return 0;
-}
-
-
-/*
-
-autoconnect()
-{
- timeout = 5
-
- // find the best one for initial connect
-
- if cur < min
- newcon =
- first from nodes
- where dclass <= my.dclass and !connection and (timestamp - last_retry) > retry_timeout
- order by dclass asc, last_connection desc
- if newcon
- timeout = 0
- goto connect
-
-
- // find better nodes to connect to: in case we have less than min connections within [BACKBONE, i] and there are nodes which we are not connected to within the range
-
- if min <= cur < max
- j = 0
- for i = BACKBONE to my.dclass
- j += count(from connections where node.dclass = i)
- if j < min
- newcon =
- first from nodes
- where dclass = i and !connection and (timestamp - last_retry) > retry_timeout
- order by last_connection desc
- if newcon
- goto connect
- else
- break
-
-
- // heal partitions
-
- if min <= cur < max
- newcon =
- first from nodes
- where dclass <= my.dclass and !reachable and (timestamp - last_retry) > retry_timeout
- order by dclass asc, last_connection desc
- if newcon
- goto connect
-
-
- // connect
-
-connect:
- if newcon
- connect newcon
-
-
- // disconnect outgoing connections in case we have more than min connections within [BACKBONE, i] and there are nodes which we are connected to within the range [i, PORTABLE]
-
- if min < cur <= max
- j = 0
- for i = BACKBONE to my.dclass
- j += count(from connections where node.dclass = i)
- if min < j
- delcon =
- first from nodes
- where dclass >= i and outgoing_connection
- order by dclass desc
- if disconnect
- goto disconnect
- else
- break
-
-
- // disconnect connections in case we have more than enough connections
-
- if max < cur
- delcon =
- first from nodes
- where outgoing_connection
- order by dclass desc
- goto disconnect
-
- // disconnect
-
-disconnect
- if delcon
- disconnect delcon
-
-
- // next iteration
- next (timeout, autoconnect)
-
-}
-
-*/
-
-
static void periodic_handler(event_loop_t *loop, void *data) {
meshlink_handle_t *mesh = loop->data;
/* Check if we need to make or break connections. */
- if(mesh->nodes->count > 1) {
-
- logger(mesh, MESHLINK_DEBUG, "--- autoconnect begin ---");
-
- int retry_timeout = min(mesh->nodes->count * default_timeout, 60);
-
- logger(mesh, MESHLINK_DEBUG, "* devclass = %d", mesh->devclass);
- logger(mesh, MESHLINK_DEBUG, "* nodes = %d", mesh->nodes->count);
- logger(mesh, MESHLINK_DEBUG, "* retry_timeout = %d", retry_timeout);
-
-
- // connect disconnect nodes
-
- node_t *connect_to = NULL;
- node_t *disconnect_from = NULL;
-
-
- // get cur_connects
-
- unsigned int cur_connects = 0;
-
- for list_each(connection_t, c, mesh->connections) {
- if(c->status.active) {
- cur_connects += 1;
- }
- }
-
- logger(mesh, MESHLINK_DEBUG, "* cur_connects = %d", cur_connects);
- logger(mesh, MESHLINK_DEBUG, "* outgoings = %d", mesh->outgoings->count);
-
- // get min_connects and max_connects
-
- unsigned int min_connects = mesh->dev_class_traits[mesh->devclass].min_connects;
- unsigned int max_connects = mesh->dev_class_traits[mesh->devclass].max_connects;
-
- logger(mesh, MESHLINK_DEBUG, "* min_connects = %d", min_connects);
- logger(mesh, MESHLINK_DEBUG, "* max_connects = %d", max_connects);
-
- // find the best one for initial connect
-
- if(cur_connects < min_connects) {
- splay_tree_t *nodes = splay_alloc_tree(node_compare_devclass_asc_lsc_desc, NULL);
-
- for splay_each(node_t, n, mesh->nodes) {
- logger(mesh, MESHLINK_DEBUG, "* %s->devclass = %d", n->name, n->devclass);
-
- if(n != mesh->self && n->devclass <= mesh->devclass && !n->connection && !n->status.blacklisted && (n->last_connect_try == 0 || (mesh->loop.now.tv_sec - n->last_connect_try) > retry_timeout)) {
- splay_insert(nodes, n);
- }
- }
-
- if(nodes->head) {
- //timeout = 0;
- connect_to = (node_t *)nodes->head->data;
-
- logger(mesh, MESHLINK_DEBUG, "* found best one for initial connect: %s", connect_to->name);
- } else {
- logger(mesh, MESHLINK_DEBUG, "* could not find node for initial connect");
- }
-
- splay_delete_tree(nodes);
- }
-
-
- // find better nodes to connect to
-
- if(!connect_to && min_connects <= cur_connects && cur_connects < max_connects) {
- unsigned int connects = 0;
-
- for(dev_class_t devclass = 0; devclass <= mesh->devclass; ++devclass) {
- for list_each(connection_t, c, mesh->connections) {
- if(c->status.active && c->node && c->node->devclass == devclass) {
- connects += 1;
- }
- }
-
- if(connects < min_connects) {
- splay_tree_t *nodes = splay_alloc_tree(node_compare_lsc_desc, NULL);
-
- for splay_each(node_t, n, mesh->nodes) {
- if(n != mesh->self && n->devclass == devclass && !n->connection && !n->status.blacklisted && (n->last_connect_try == 0 || (mesh->loop.now.tv_sec - n->last_connect_try) > retry_timeout)) {
- splay_insert(nodes, n);
- }
- }
-
- if(nodes->head) {
- logger(mesh, MESHLINK_DEBUG, "* found better node");
- connect_to = (node_t *)nodes->head->data;
-
- splay_delete_tree(nodes);
- break;
- }
-
- splay_delete_tree(nodes);
- } else {
- break;
- }
- }
-
- if(!connect_to) {
- logger(mesh, MESHLINK_DEBUG, "* could not find better nodes");
- }
- }
-
-
- // heal partitions
-
- if(!connect_to && min_connects <= cur_connects && cur_connects < max_connects) {
- splay_tree_t *nodes = splay_alloc_tree(node_compare_devclass_asc_lsc_desc, NULL);
-
- for splay_each(node_t, n, mesh->nodes) {
- if(n != mesh->self && n->devclass <= mesh->devclass && !n->status.reachable && !n->status.blacklisted && (n->last_connect_try == 0 || (mesh->loop.now.tv_sec - n->last_connect_try) > retry_timeout)) {
- splay_insert(nodes, n);
- }
- }
-
- if(nodes->head) {
- logger(mesh, MESHLINK_DEBUG, "* try to heal partition");
- connect_to = (node_t *)nodes->head->data;
- } else {
- logger(mesh, MESHLINK_DEBUG, "* could not find nodes for partition healing");
- }
-
- splay_delete_tree(nodes);
- }
-
-
- // perform connect
-
- if(connect_to && !connect_to->connection) {
- connect_to->last_connect_try = mesh->loop.now.tv_sec;
- logger(mesh, MESHLINK_DEBUG, "Autoconnect trying to connect to %s", connect_to->name);
-
- /* check if there is already a connection attempt to this node */
- bool skip = false;
-
- for list_each(outgoing_t, outgoing, mesh->outgoings) {
- if(outgoing->node == connect_to) {
- logger(mesh, MESHLINK_DEBUG, "* skip autoconnect since it is an outgoing connection already");
- skip = true;
- break;
- }
- }
-
- if(!connect_to->status.reachable && !node_read_public_key(mesh, connect_to)) {
- logger(mesh, MESHLINK_DEBUG, "* skip autoconnect since we don't know this node's public key");
- skip = true;
- }
-
- if(!skip) {
- logger(mesh, MESHLINK_DEBUG, "Autoconnecting to %s", connect_to->name);
- outgoing_t *outgoing = xzalloc(sizeof(outgoing_t));
- outgoing->node = connect_to;
- list_insert_tail(mesh->outgoings, outgoing);
- setup_outgoing_connection(mesh, outgoing);
- }
- }
-
-
- // disconnect suboptimal outgoing connections
-
- if(min_connects < cur_connects /*&& cur_connects <= max_connects*/) {
- unsigned int connects = 0;
-
- for(dev_class_t devclass = 0; devclass <= mesh->devclass; ++devclass) {
- for list_each(connection_t, c, mesh->connections) {
- if(c->status.active && c->node && c->node->devclass == devclass) {
- connects += 1;
- }
- }
-
- if(min_connects < connects) {
- splay_tree_t *nodes = splay_alloc_tree(node_compare_devclass_desc, NULL);
-
- for list_each(connection_t, c, mesh->connections) {
- if(c->outgoing && c->node && c->node->devclass >= devclass) {
- splay_insert(nodes, c->node);
- }
- }
-
- if(nodes->head) {
- logger(mesh, MESHLINK_DEBUG, "* disconnect suboptimal outgoing connection");
- disconnect_from = (node_t *)nodes->head->data;
- }
-
- splay_delete_tree(nodes);
- break;
- }
- }
-
- if(!disconnect_from) {
- logger(mesh, MESHLINK_DEBUG, "* no suboptimal outgoing connections");
- }
- }
-
-
- // disconnect connections (too many connections)
-
- if(!disconnect_from && max_connects < cur_connects) {
- splay_tree_t *nodes = splay_alloc_tree(node_compare_devclass_desc, NULL);
-
- for list_each(connection_t, c, mesh->connections) {
- if(c->status.active && c->node) {
- splay_insert(nodes, c->node);
- }
- }
-
- if(nodes->head) {
- logger(mesh, MESHLINK_DEBUG, "* disconnect connection (too many connections)");
-
- //timeout = 0;
- disconnect_from = (node_t *)nodes->head->data;
- } else {
- logger(mesh, MESHLINK_DEBUG, "* no node we want to disconnect, even though we have too many connections");
- }
-
- splay_delete_tree(nodes);
- }
-
-
- // perform disconnect
-
- if(disconnect_from && disconnect_from->connection) {
- logger(mesh, MESHLINK_DEBUG, "Autodisconnecting from %s", disconnect_from->connection->name);
- list_delete(mesh->outgoings, disconnect_from->connection->outgoing);
- disconnect_from->connection->outgoing = NULL;
- terminate_connection(mesh, disconnect_from->connection, disconnect_from->connection->status.active);
- }
-
- // reduce timeout if we don't have enough connections + outgoings
- if(cur_connects + mesh->outgoings->count < 3) {
- timeout = 1;
- }
-
- // done!
-
- logger(mesh, MESHLINK_DEBUG, "--- autoconnect end ---");
+ if(mesh->peer && !mesh->connection && !mesh->outgoing) {
+ logger(mesh, MESHLINK_DEBUG, "Autoconnecting to %s", mesh->peer->name);
+ mesh->outgoing = xzalloc(sizeof(outgoing_t));
+ mesh->outgoing->node = mesh->peer;
+ setup_outgoing_connection(mesh, mesh->outgoing);
}
- for splay_each(node_t, n, mesh->nodes) {
+ for(node_t *n = mesh->peer; n; n = NULL) {
if(n->status.dirty) {
if(!node_write_config(mesh, n, false)) {
logger(mesh, MESHLINK_DEBUG, "Could not update %s", n->name);
}
}
-
- if(n->status.reachable && n->status.validkey && n->last_req_key + 3600 < mesh->loop.now.tv_sec) {
- logger(mesh, MESHLINK_DEBUG, "SPTPS key renewal for node %s", n->name);
- devtool_sptps_renewal_probe((meshlink_node_t *)n);
-
- if(!sptps_force_kex(&n->sptps)) {
- logger(mesh, MESHLINK_ERROR, "SPTPS key renewal for node %s failed", n->name);
- n->status.validkey = false;
- sptps_stop(&n->sptps);
- n->status.waitingforkey = false;
- n->last_req_key = -3600;
- } else {
- n->last_req_key = mesh->loop.now.tv_sec;
- }
- }
}
timeout_set(&mesh->loop, data, &(struct timespec) {
void retry(meshlink_handle_t *mesh) {
/* Reset the reconnection timers for all outgoing connections */
- for list_each(outgoing_t, outgoing, mesh->outgoings) {
+ for(outgoing_t *outgoing = mesh->outgoing; outgoing; outgoing = NULL) {
outgoing->timeout = 0;
if(outgoing->ev.cb) {
/* For active connections, check if their addresses are still valid.
* If yes, reset their ping timers, otherwise terminate them. */
- for list_each(connection_t, c, mesh->connections) {
+ for(connection_t *c = mesh->connection; c; c = NULL) {
if(!c->status.active) {
continue;
}
projects / meshlink-tiny / blobdiff