X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fnet.c;h=4a5c4b9f72a6631b987ea185140d00be69d58508;hp=5632727a9ee140e73b2039b2cb45e02476060c8e;hb=82ebfc923ddb050c88bdf5d65ac943a15ca8748a;hpb=f93b1334e087dd7af1b87f475b2d398fdd4d56ab diff --git a/src/net.c b/src/net.c index 5632727a..4a5c4b9f 100644 --- a/src/net.c +++ b/src/net.c @@ -1,7 +1,7 @@ /* net.c -- most of the network code - Copyright (C) 1998-2002 Ivo Timmermans , - 2000-2002 Guus Sliepen + Copyright (C) 1998-2002 Ivo Timmermans , + 2000-2002 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 @@ -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 1.35.4.159 2002/03/01 13:18:54 guus Exp $ + $Id: net.c,v 1.35.4.176 2002/09/04 13:48:51 guus Exp $ */ #include "config.h" @@ -26,8 +26,13 @@ #include #include #include -#ifdef HAVE_LINUX +#ifdef HAVE_NETINET_IN_SYSTM_H + #include +#endif +#ifdef HAVE_NETINET_IP_H #include +#endif +#ifdef HAVE_NETINET_TCP_H #include #endif #include @@ -68,37 +73,15 @@ #include "system.h" -int do_prune = 0; +#ifndef HAVE_RAND_PSEUDO_BYTES +#define RAND_pseudo_bytes RAND_bytes +#endif + int do_purge = 0; int sighup = 0; int sigalrm = 0; -/* - 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 -} +time_t now = 0; /* Purge edges and subnets of unreachable nodes. Use carefully. */ @@ -159,6 +142,43 @@ cp cp } +/* + put all file descriptors in an fd_set array + While we're at it, purge stuff that needs to be removed. +*/ +void build_fdset(fd_set *fs) +{ + avl_node_t *node, *next; + connection_t *c; + int i; +cp + FD_ZERO(fs); + + 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(); + } + else + FD_SET(c->socket, fs); + } + + for(i = 0; i < listen_sockets; i++) + { + FD_SET(listen_socket[i].tcp, fs); + FD_SET(listen_socket[i].udp, fs); + } + + FD_SET(device_fd, fs); +cp +} + /* Terminate a connection: - Close the socket @@ -179,6 +199,10 @@ cp c->name, c->hostname); c->status.remove = 1; + c->status.active = 0; + + if(c->node) + c->node->connection = NULL; if(c->socket) close(c->socket); @@ -196,11 +220,11 @@ cp } edge_del(c->edge); - } - /* Run MST and SSSP algorithms */ + /* Run MST and SSSP algorithms */ - graph(); + graph(); + } /* Check if this was our outgoing connection */ @@ -209,13 +233,6 @@ cp retry_outgoing(c->outgoing); c->outgoing = NULL; } - - /* Deactivate */ - - c->status.active = 0; - if(c->node) - c->node->connection = NULL; - do_prune = 1; cp } @@ -229,12 +246,9 @@ cp */ void check_dead_connections(void) { - time_t now; avl_node_t *node, *next; connection_t *c; cp - now = time(NULL); - for(node = connection_tree->head; node; node = next) { next = node->next; @@ -286,20 +300,12 @@ cp 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; + continue; if(FD_ISSET(c->socket, f)) { @@ -321,29 +327,18 @@ cp if(receive_meta(c) < 0) { terminate_connection(c, c->status.active); - return; + continue; } } } -cp -} -void prune_connections(void) -{ - connection_t *c; - avl_node_t *node, *next; -cp - for(node = connection_tree->head; node; node = next) + for(i = 0; i < listen_sockets; i++) { - next = node->next; - c = (connection_t *)node->data; - - if(c->status.remove) - connection_del(c); + if(FD_ISSET(listen_socket[i].udp, f)) + handle_incoming_vpn_data(listen_socket[i].udp); + if(FD_ISSET(listen_socket[i].tcp, f)) + handle_new_meta_connection(listen_socket[i].tcp); } - - if(!connection_tree->head) - purge(); cp } @@ -356,15 +351,16 @@ void main_loop(void) struct timeval tv; int r; time_t last_ping_check; - int t; event_t *event; cp - last_ping_check = time(NULL); + last_ping_check = now; - srand(time(NULL)); + 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; @@ -372,47 +368,47 @@ cp if((r = select(FD_SETSIZE, &fset, NULL, NULL, &tv)) < 0) { - if(errno != EINTR) /* because of a signal */ + if(errno != EINTR && errno != EAGAIN) { syslog(LOG_ERR, _("Error while waiting for input: %s"), strerror(errno)); + cp_trace(); + dump_connections(); return; } - } - - if(r > 0) - check_network_activity(&fset); - if(do_prune) - { - prune_connections(); - do_prune = 0; + continue; } - if(do_purge) + check_network_activity(&fset); + + if(do_purge) { purge(); do_purge = 0; } - t = time(NULL); - /* Let's check if everybody is still alive */ - if(last_ping_check + pingtimeout < t) + if(last_ping_check + pingtimeout < now) { check_dead_connections(); - last_ping_check = time(NULL); + last_ping_check = now; + + if(routing_mode== RMODE_SWITCH) + age_mac(); + + age_past_requests(); /* Should we regenerate our key? */ - if(keyexpires < t) + 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 = time(NULL) + keylifetime; + keyexpires = now + keylifetime; } } @@ -442,14 +438,14 @@ cp close_network_connections(); exit_configuration(&config_tree); - syslog(LOG_INFO, _("Rereading configuration file and restarting in 5 seconds")); + 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, exiting")); + syslog(LOG_ERR, _("Unable to reread configuration file, exitting.")); exit(1); }