X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=src%2Fnet.c;h=80490efadb785ab59db7cb6e8a43e850008b9131;hb=a5a8005b2d89712e124ab7295165a3e229abdad5;hp=4061d7af7bf0e28191373256fbd12e83d76f9dff;hpb=4fda4560bbdd41e217ce0e1a90ba98c79e4f3519;p=meshlink diff --git a/src/net.c b/src/net.c index 4061d7af..80490efa 100644 --- a/src/net.c +++ b/src/net.c @@ -1,7 +1,6 @@ /* net.c -- most of the network code - Copyright (C) 1998-2002 Ivo Timmermans , - 2000-2002 Guus Sliepen + Copyright (C) 2014-2017 Guus Sliepen This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -13,212 +12,92 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - - $Id: net.c,v 1.35.4.162 2002/03/11 11:23:04 guus Exp $ + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ -#include "config.h" - -#include -#include -#include -#include -#ifdef HAVE_LINUX - #include - #include -#endif -#include -#include -#include -#include -#include -#include -#include -#include -#include -/* SunOS really wants sys/socket.h BEFORE net/if.h, - and FreeBSD wants these lines below the rest. */ -#include -#include -#include - -#include - -#include -#include -#include -#include +#include "system.h" +#include "utils.h" #include "conf.h" #include "connection.h" +#include "graph.h" +#include "logger.h" +#include "meshlink_internal.h" #include "meta.h" #include "net.h" #include "netutl.h" -#include "process.h" #include "protocol.h" -#include "subnet.h" -#include "graph.h" -#include "process.h" -#include "route.h" -#include "device.h" -#include "event.h" +#include "xalloc.h" -#include "system.h" - -int do_prune = 0; -int do_purge = 0; -int sighup = 0; -int sigalrm = 0; - -time_t now = 0; +#include -/* - put all file descriptors in an fd_set array -*/ -void build_fdset(fd_set *fs) -{ - avl_node_t *node; - connection_t *c; - int i; -cp - FD_ZERO(fs); - - for(node = connection_tree->head; node; node = node->next) - { - c = (connection_t *)node->data; - FD_SET(c->socket, fs); - } - - for(i = 0; i < listen_sockets; i++) - { - FD_SET(tcp_socket[i], fs); - FD_SET(udp_socket[i], fs); - } - - FD_SET(device_fd, fs); -cp +#if !defined(min) +static inline int min(int a, int b) { + return a < b ? a : b; } +#endif -/* Purge edges and subnets of unreachable nodes. Use carefully. */ - -void purge(void) -{ - avl_node_t *nnode, *nnext, *enode, *enext, *snode, *snext, *cnode; - node_t *n; - edge_t *e; - subnet_t *s; - connection_t *c; -cp - if(debug_lvl >= DEBUG_PROTOCOL) - syslog(LOG_DEBUG, _("Purging unreachable nodes")); - - for(nnode = node_tree->head; nnode; nnode = nnext) - { - nnext = nnode->next; - n = (node_t *)nnode->data; - - if(!n->status.reachable) - { - if(debug_lvl >= DEBUG_SCARY_THINGS) - syslog(LOG_DEBUG, _("Purging node %s (%s)"), n->name, n->hostname); - - for(snode = n->subnet_tree->head; snode; snode = snext) - { - snext = snode->next; - s = (subnet_t *)snode->data; - - for(cnode = connection_tree->head; cnode; cnode = cnode->next) - { - c = (connection_t *)cnode->data; - if(c->status.active) - send_del_subnet(c, s); - } - - subnet_del(n, s); - } - - for(enode = n->edge_tree->head; enode; enode = enext) - { - enext = enode->next; - e = (edge_t *)enode->data; - - for(cnode = connection_tree->head; cnode; cnode = cnode->next) - { - c = (connection_t *)cnode->data; - if(c->status.active) - send_del_edge(c, e); - } - - edge_del(e); - } - - node_del(n); - } - } -cp -} +static const int default_timeout = 5; +static const int default_interval = 60; /* Terminate a connection: - - Close the socket - - Remove associated edge and tell other connections about it if report = 1 + - Mark it as inactive + - Remove the edge representing this connection + - Kill it with fire - Check if we need to retry making an outgoing connection - - Deactivate the host */ -void terminate_connection(connection_t *c, int report) -{ - avl_node_t *node; - connection_t *other; -cp - if(c->status.remove) - return; - - if(debug_lvl >= DEBUG_CONNECTIONS) - syslog(LOG_NOTICE, _("Closing connection with %s (%s)"), - c->name, c->hostname); - - c->status.remove = 1; - - if(c->socket) - close(c->socket); - - if(c->edge) - { - if(report) - { - for(node = connection_tree->head; node; node = node->next) - { - other = (connection_t *)node->data; - if(other->status.active && other != c) - send_del_edge(other, c->edge); - } - } - - edge_del(c->edge); - } - - /* Run MST and SSSP algorithms */ - - graph(); - - /* Check if this was our outgoing connection */ - - if(c->outgoing) - { - retry_outgoing(c->outgoing); - c->outgoing = NULL; - } - - /* Deactivate */ - - c->status.active = 0; - if(c->node) - c->node->connection = NULL; - do_prune = 1; -cp +void terminate_connection(meshlink_handle_t *mesh, connection_t *c, bool report) { + logger(mesh, MESHLINK_INFO, "Closing connection with %s", c->name); + + c->status.active = false; + + if(c->node && c->node->connection == c) { + c->node->connection = NULL; + } + + 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); + + /* Check if this was our outgoing connection */ + + if(outgoing) { + do_outgoing_connection(mesh, outgoing); + } + +#ifndef HAVE_MINGW + /* Clean up dead proxy processes */ + + while(waitpid(-1, NULL, WNOHANG) > 0); + +#endif } /* @@ -229,237 +108,619 @@ cp end does not reply in time, we consider them dead and close the connection. */ -void check_dead_connections(void) -{ - avl_node_t *node, *next; - connection_t *c; -cp - for(node = connection_tree->head; node; node = next) - { - next = node->next; - c = (connection_t *)node->data; - if(c->last_ping_time + pingtimeout < now) - { - if(c->status.active) - { - if(c->status.pinged) - { - if(debug_lvl >= DEBUG_PROTOCOL) - syslog(LOG_INFO, _("%s (%s) didn't respond to PING"), - c->name, c->hostname); - c->status.timeout = 1; - terminate_connection(c, 1); - } - else - { - send_ping(c); - } - } - else - { - if(debug_lvl >= DEBUG_CONNECTIONS) - syslog(LOG_WARNING, _("Timeout from %s (%s) during authentication"), - c->name, c->hostname); - terminate_connection(c, 0); - } - } - } -cp +static void timeout_handler(event_loop_t *loop, void *data) { + assert(data); + + meshlink_handle_t *mesh = loop->data; + logger(mesh, MESHLINK_DEBUG, "timeout_handler()"); + + for list_each(connection_t, c, mesh->connections) { + 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->last_ping_time + pingtimeout <= mesh->loop.now.tv_sec) { + if(c->status.active) { + if(c->status.pinged) { + logger(mesh, MESHLINK_INFO, "%s didn't respond to PING in %ld seconds", c->name, (long)mesh->loop.now.tv_sec - c->last_ping_time); + } else if(c->last_ping_time + pinginterval <= mesh->loop.now.tv_sec) { + send_ping(mesh, c); + continue; + } else { + continue; + } + } else { + if(c->status.connecting) { + logger(mesh, MESHLINK_WARNING, "Timeout while connecting to %s", c->name); + } else { + logger(mesh, MESHLINK_WARNING, "Timeout from %s during authentication", c->name); + } + } + + terminate_connection(mesh, c, c->status.active); + } + } + + timeout_set(&mesh->loop, data, &(struct timeval) { + default_timeout, prng(mesh, TIMER_FUDGE) + }); +} + +// 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; +} + + /* - check all connections to see if anything - happened on their sockets -*/ -void check_network_activity(fd_set *f) + +autoconnect() { - connection_t *c; - avl_node_t *node; - int result, i; - int len = sizeof(result); - vpn_packet_t packet; -cp - if(FD_ISSET(device_fd, f)) - { - if(!read_packet(&packet)) - route_outgoing(&packet); - } - - for(i = 0; i < listen_sockets; i++) - { - if(FD_ISSET(udp_socket[i], f)) - handle_incoming_vpn_data(udp_socket[i]); - if(FD_ISSET(tcp_socket[i], f)) - handle_new_meta_connection(tcp_socket[i]); - } - - for(node = connection_tree->head; node; node = node->next) - { - c = (connection_t *)node->data; - - if(c->status.remove) - return; - - if(FD_ISSET(c->socket, f)) - { - if(c->status.connecting) - { - c->status.connecting = 0; - getsockopt(c->socket, SOL_SOCKET, SO_ERROR, &result, &len); - if(!result) - finish_connecting(c); - else - { - if(debug_lvl >= DEBUG_CONNECTIONS) - syslog(LOG_DEBUG, _("Error while connecting to %s (%s): %s"), c->name, c->hostname, strerror(result)); - close(c->socket); - do_outgoing_connection(c); - continue; - } - } - if(receive_meta(c) < 0) - { - terminate_connection(c, c->status.active); - return; - } - } - } -cp + 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) + } -void prune_connections(void) -{ - connection_t *c; - avl_node_t *node, *next; -cp - for(node = connection_tree->head; node; node = next) - { - next = node->next; - c = (connection_t *)node->data; - - if(c->status.remove) - connection_del(c); - } - - if(!connection_tree->head) - purge(); -cp +*/ + + +static void periodic_handler(event_loop_t *loop, void *data) { + meshlink_handle_t *mesh = loop->data; + + /* Check if there are too many contradicting ADD_EDGE and DEL_EDGE messages. + This usually only happens when another node has the same Name as this node. + If so, sleep for a short while to prevent a storm of contradicting messages. + */ + + if(mesh->contradicting_del_edge > 100 && mesh->contradicting_add_edge > 100) { + logger(mesh, MESHLINK_WARNING, "Possible node with same Name as us! Sleeping %d seconds.", mesh->sleeptime); + usleep(mesh->sleeptime * 1000000LL); + mesh->sleeptime *= 2; + + if(mesh->sleeptime < 0) { + mesh->sleeptime = 3600; + } + } else { + mesh->sleeptime /= 2; + + if(mesh->sleeptime < 10) { + mesh->sleeptime = 10; + } + } + + mesh->contradicting_add_edge = 0; + mesh->contradicting_del_edge = 0; + + int timeout = default_timeout; + + /* 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 ---"); + } + + for splay_each(node_t, n, mesh->nodes) { + if(n->status.dirty) { + node_write_config(mesh, n); + n->status.dirty = false; + } + } + + timeout_set(&mesh->loop, data, &(struct timeval) { + timeout, prng(mesh, TIMER_FUDGE) + }); +} + +void handle_meta_connection_data(meshlink_handle_t *mesh, connection_t *c) { + if(!receive_meta(mesh, c)) { + terminate_connection(mesh, c, c->status.active); + return; + } +} + +void retry(meshlink_handle_t *mesh) { + /* Reset the reconnection timers for all outgoing connections */ + for list_each(outgoing_t, outgoing, mesh->outgoings) { + outgoing->timeout = 0; + + if(outgoing->ev.cb) + timeout_set(&mesh->loop, &outgoing->ev, &(struct timeval) { + 0, 0 + }); + } + +#ifdef HAVE_IFADDRS_H + struct ifaddrs *ifa = NULL; + getifaddrs(&ifa); +#endif + + /* 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) { + if(!c->status.active) { + continue; + } + + if(!c->status.pinged) { + c->last_ping_time = 0; + } + +#ifdef HAVE_IFADDRS_H + + if(!ifa) { + continue; + } + + sockaddr_t sa; + socklen_t salen = sizeof(sa); + + if(getsockname(c->socket, &sa.sa, &salen)) { + continue; + } + + bool found = false; + + for(struct ifaddrs *ifap = ifa; ifap; ifap = ifap->ifa_next) { + if(ifap->ifa_addr && !sockaddrcmp_noport(&sa, (sockaddr_t *)ifap->ifa_addr)) { + found = true; + break; + } + + } + + if(!found) { + logger(mesh, MESHLINK_DEBUG, "Local address for connection to %s no longer valid, terminating", c->name); + terminate_connection(mesh, c, c->status.active); + } + +#endif + } + +#ifdef HAVE_IFADDRS_H + + if(ifa) { + freeifaddrs(ifa); + } + +#endif + + /* Kick the ping timeout handler */ + timeout_set(&mesh->loop, &mesh->pingtimer, &(struct timeval) { + 0, 0 + }); } /* this is where it all happens... */ -void main_loop(void) -{ - fd_set fset; - struct timeval tv; - int r; - time_t last_ping_check; - int t; - event_t *event; -cp - last_ping_check = now; - - srand(now); - - for(;;) - { - now = time(NULL); - - tv.tv_sec = 1 + (rand() & 7); /* Approx. 5 seconds, randomized to prevent global synchronisation effects */ - tv.tv_usec = 0; - - build_fdset(&fset); - - if((r = select(FD_SETSIZE, &fset, NULL, NULL, &tv)) < 0) - { - if(errno != EINTR) /* because of a signal */ - { - syslog(LOG_ERR, _("Error while waiting for input: %s"), strerror(errno)); - return; - } - } - - if(r > 0) - check_network_activity(&fset); - - if(do_prune) - { - prune_connections(); - do_prune = 0; - } - - if(do_purge) - { - purge(); - do_purge = 0; - } - - /* Let's check if everybody is still alive */ - - if(last_ping_check + pingtimeout < now) - { - check_dead_connections(); - last_ping_check = now; - - if(routing_mode== RMODE_SWITCH) - age_mac(); - - /* Should we regenerate our key? */ - - if(keyexpires < now) - { - if(debug_lvl >= DEBUG_STATUS) - syslog(LOG_INFO, _("Regenerating symmetric key")); - - RAND_pseudo_bytes(myself->key, myself->keylength); - send_key_changed(myself->connection, myself); - keyexpires = now + keylifetime; - } - } - - - while((event = get_expired_event())) - { - event->handler(event->data); - free(event); - } - - if(sigalrm) - { - syslog(LOG_INFO, _("Flushing event queue")); - - while(event_tree->head) - { - event = (event_t *)event_tree->head->data; - event->handler(event->data); - event_del(event); - } - sigalrm = 0; - } - - if(sighup) - { - sighup = 0; - close_network_connections(); - exit_configuration(&config_tree); - - syslog(LOG_INFO, _("Rereading configuration file and restarting in 5 seconds...")); - sleep(5); - - init_configuration(&config_tree); - - if(read_server_config()) - { - syslog(LOG_ERR, _("Unable to reread configuration file, exitting.")); - exit(1); - } - - if(setup_network_connections()) - return; - - continue; - } - } -cp +int main_loop(meshlink_handle_t *mesh) { + timeout_add(&mesh->loop, &mesh->pingtimer, timeout_handler, &mesh->pingtimer, &(struct timeval) { + default_timeout, prng(mesh, TIMER_FUDGE) + }); + timeout_add(&mesh->loop, &mesh->periodictimer, periodic_handler, &mesh->periodictimer, &(struct timeval) { + 0, 0 + }); + + //Add signal handler + mesh->datafromapp.signum = 0; + signal_add(&mesh->loop, &mesh->datafromapp, meshlink_send_from_queue, mesh, mesh->datafromapp.signum); + + if(!event_loop_run(&mesh->loop, &mesh->mutex)) { + logger(mesh, MESHLINK_ERROR, "Error while waiting for input: %s", strerror(errno)); + abort(); + signal_del(&mesh->loop, &mesh->datafromapp); + timeout_del(&mesh->loop, &mesh->periodictimer); + timeout_del(&mesh->loop, &mesh->pingtimer); + + return 1; + } + + signal_del(&mesh->loop, &mesh->datafromapp); + timeout_del(&mesh->loop, &mesh->periodictimer); + timeout_del(&mesh->loop, &mesh->pingtimer); + + return 0; }