X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fnet.c;h=e0b5e6f42e725bc3f8dab49cfb1519c80662dcb1;hp=475ea0c98e7213dce8da31532ac42310298d86af;hb=e3220cacb5bc79fc56167e61b7a342f88a33a479;hpb=eefa28059ab989c915a7d95fb4ae728abd7ce713 diff --git a/src/net.c b/src/net.c index 475ea0c9..e0b5e6f4 100644 --- a/src/net.c +++ b/src/net.c @@ -17,7 +17,7 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: net.c,v 1.35.4.192 2003/07/22 20:55:19 guus Exp $ + $Id: net.c,v 1.35.4.201 2003/11/17 15:30:17 guus Exp $ */ #include "system.h" @@ -39,8 +39,10 @@ #include "protocol.h" #include "route.h" #include "subnet.h" +#include "xalloc.h" bool do_purge = false; +volatile bool running = false; time_t now = 0; @@ -57,9 +59,11 @@ static void purge(void) ifdebug(PROTOCOL) logger(LOG_DEBUG, _("Purging unreachable nodes")); + /* Remove all edges and subnets owned by unreachable nodes. */ + for(nnode = node_tree->head; nnode; nnode = nnext) { nnext = nnode->next; - n = (node_t *) nnode->data; + n = nnode->data; if(!n->status.reachable) { ifdebug(SCARY_THINGS) logger(LOG_DEBUG, _("Purging node %s (%s)"), n->name, @@ -67,19 +71,39 @@ static void purge(void) for(snode = n->subnet_tree->head; snode; snode = snext) { snext = snode->next; - s = (subnet_t *) snode->data; - send_del_subnet(broadcast, s); + s = snode->data; + if(!tunnelserver) + send_del_subnet(broadcast, s); subnet_del(n, s); } for(enode = n->edge_tree->head; enode; enode = enext) { enext = enode->next; - e = (edge_t *) enode->data; - send_del_edge(broadcast, e); + e = enode->data; + if(!tunnelserver) + send_del_edge(broadcast, e); edge_del(e); } + } + } + + /* Check if anyone else claims to have an edge to an unreachable node. If not, delete node. */ + + for(nnode = node_tree->head; nnode; nnode = nnext) { + nnext = nnode->next; + n = nnode->data; + + if(!n->status.reachable) { + for(enode = edge_weight_tree->head; enode; enode = enext) { + enext = enode->next; + e = enode->data; + + if(e->to == n) + break; + } - node_del(n); + if(!enode) + node_del(n); } } } @@ -100,7 +124,7 @@ static int build_fdset(fd_set * fs) for(node = connection_tree->head; node; node = next) { next = node->next; - c = (connection_t *) node->data; + c = node->data; if(c->status.remove) { connection_del(c); @@ -153,10 +177,10 @@ void terminate_connection(connection_t *c, bool report) c->node->connection = NULL; if(c->socket) - close(c->socket); + closesocket(c->socket); if(c->edge) { - if(report) + if(report && !tunnelserver) send_del_edge(broadcast, c->edge); edge_del(c->edge); @@ -164,6 +188,18 @@ void terminate_connection(connection_t *c, bool report) /* Run MST and SSSP algorithms */ graph(); + + /* If the node is not reachable anymore but we remember it had an edge to us, clean it up */ + + if(report && !c->node->status.reachable) { + edge_t *e; + e = lookup_edge(c->node, myself); + if(e) { + if(!tunnelserver) + send_del_edge(broadcast, e); + edge_del(e); + } + } } /* Check if this was our outgoing connection */ @@ -191,7 +227,7 @@ static void check_dead_connections(void) for(node = connection_tree->head; node; node = next) { next = node->next; - c = (connection_t *) node->data; + c = node->data; if(c->last_ping_time + pingtimeout < now) { if(c->status.active) { @@ -206,7 +242,7 @@ static void check_dead_connections(void) } else { if(c->status.remove) { logger(LOG_WARNING, _("Old connection_t for %s (%s) status %04x still lingering, deleting..."), - c->name, c->hostname, c->status); + c->name, c->hostname, *(uint32_t *)&c->status); connection_del(c); continue; } @@ -238,7 +274,7 @@ static void check_network_activity(fd_set * f) } for(node = connection_tree->head; node; node = node->next) { - c = (connection_t *) node->data; + c = node->data; if(c->status.remove) continue; @@ -254,7 +290,7 @@ static void check_network_activity(fd_set * f) ifdebug(CONNECTIONS) logger(LOG_DEBUG, _("Error while connecting to %s (%s): %s"), c->name, c->hostname, strerror(result)); - close(c->socket); + closesocket(c->socket); do_outgoing_connection(c); continue; } @@ -279,7 +315,7 @@ static void check_network_activity(fd_set * f) /* this is where it all happens... */ -void main_loop(void) +int main_loop(void) { fd_set fset; struct timeval tv; @@ -293,7 +329,9 @@ void main_loop(void) last_config_check = now; srand(now); - for(;;) { + running = true; + + while(running) { now = time(NULL); tv.tv_sec = 1 + (rand() & 7); /* Approx. 5 seconds, randomized to prevent global synchronisation effects */ @@ -309,7 +347,7 @@ void main_loop(void) strerror(errno)); cp_trace(); dump_connections(); - return; + return 1; } continue; @@ -339,7 +377,8 @@ void main_loop(void) ifdebug(STATUS) logger(LOG_INFO, _("Regenerating symmetric key")); RAND_pseudo_bytes(myself->key, myself->keylength); - EVP_DecryptInit_ex(&packet_ctx, myself->cipher, NULL, myself->key, myself->key + myself->cipher->key_len); + if(myself->cipher) + EVP_DecryptInit_ex(&packet_ctx, myself->cipher, NULL, myself->key, myself->key + myself->cipher->key_len); send_key_changed(broadcast, myself); keyexpires = now + keylifetime; } @@ -355,7 +394,7 @@ void main_loop(void) logger(LOG_INFO, _("Flushing event queue")); while(event_tree->head) { - event = (event_t *) event_tree->head->data; + event = event_tree->head->data; event->handler(event->data); event_del(event); } @@ -377,13 +416,13 @@ void main_loop(void) if(!read_server_config()) { logger(LOG_ERR, _("Unable to reread configuration file, exitting.")); - exit(1); + return 1; } /* Close connections to hosts that have a changed or deleted host config file */ for(node = connection_tree->head; node; node = node->next) { - c = (connection_t *) node->data; + c = node->data; if(c->outgoing) { free(c->outgoing->name); @@ -403,8 +442,8 @@ void main_loop(void) /* Try to make outgoing connections */ try_outgoing_connections(); - - continue; } } + + return 0; }