/*
net.c -- most of the network code
- Copyright (C) 1998-2001 Ivo Timmermans <itimmermans@bigfoot.com>,
- 2000,2001 Guus Sliepen <guus@sliepen.warande.net>
+ Copyright (C) 1998-2005 Ivo Timmermans <ivo@tinc-vpn.org>,
+ 2000-2005 Guus Sliepen <guus@tinc-vpn.org>
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
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: net.c,v 1.35.4.120 2001/07/15 18:07:31 guus Exp $
+ $Id$
*/
-#include "config.h"
-
-#include <errno.h>
-#include <fcntl.h>
-#include <netdb.h>
-#include <netinet/in.h>
-#ifdef HAVE_LINUX
- #include <netinet/ip.h>
- #include <netinet/tcp.h>
-#endif
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/signal.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <syslog.h>
-#include <unistd.h>
-#include <sys/ioctl.h>
-/* SunOS really wants sys/socket.h BEFORE net/if.h,
- and FreeBSD wants these lines below the rest. */
-#include <arpa/inet.h>
-#include <sys/socket.h>
-#include <net/if.h>
+#include "system.h"
#include <openssl/rand.h>
-#include <openssl/evp.h>
-#include <openssl/pem.h>
-
-#ifndef HAVE_RAND_PSEUDO_BYTES
-#define RAND_pseudo_bytes RAND_bytes
-#endif
-
-#ifdef HAVE_TUNTAP
- #ifdef HAVE_LINUX
- #ifdef LINUX_IF_TUN_H
- #include LINUX_IF_TUN_H
- #else
- #include <linux/if_tun.h>
- #endif
- #else
- #include <net/if_tun.h>
- #endif
-#endif
-
-#include <utils.h>
-#include <xalloc.h>
-#include <avl_tree.h>
-#include <list.h>
+#include "utils.h"
+#include "avl_tree.h"
#include "conf.h"
#include "connection.h"
+#include "device.h"
+#include "event.h"
+#include "graph.h"
+#include "logger.h"
#include "meta.h"
#include "net.h"
#include "netutl.h"
#include "process.h"
#include "protocol.h"
-#include "subnet.h"
-#include "process.h"
#include "route.h"
+#include "subnet.h"
+#include "xalloc.h"
-#include "system.h"
-
-int tap_fd = -1;
-int taptype = TAP_TYPE_ETHERTAP;
-int total_tap_in = 0;
-int total_tap_out = 0;
-int total_socket_in = 0;
-int total_socket_out = 0;
+bool do_purge = false;
+volatile bool running = false;
-config_t *upstreamcfg;
-int seconds_till_retry = 5;
+time_t now = 0;
-int keylifetime = 0;
-int keyexpires = 0;
+/* Purge edges and subnets of unreachable nodes. Use carefully. */
-void send_udppacket(connection_t *cl, vpn_packet_t *inpkt)
+static void purge(void)
{
- vpn_packet_t outpkt;
- int outlen, outpad;
- EVP_CIPHER_CTX ctx;
- struct sockaddr_in to;
- socklen_t tolen = sizeof(to);
- vpn_packet_t *copy;
-cp
- if(!cl->status.validkey)
- {
- if(debug_lvl >= DEBUG_TRAFFIC)
- syslog(LOG_INFO, _("No valid key known yet for %s (%s), queueing packet"),
- cl->name, cl->hostname);
-
- /* Since packet is on the stack of handle_tap_input(),
- we have to make a copy of it first. */
-
- copy = xmalloc(sizeof(vpn_packet_t));
- memcpy(copy, inpkt, sizeof(vpn_packet_t));
-
- list_insert_tail(cl->queue, copy);
-
- if(!cl->status.waitingforkey)
- send_req_key(myself, cl);
- return;
- }
-
- /* Encrypt the packet. */
-
- RAND_pseudo_bytes(inpkt->salt, sizeof(inpkt->salt));
-
- EVP_EncryptInit(&ctx, cl->cipher_pkttype, cl->cipher_pktkey, cl->cipher_pktkey + cl->cipher_pkttype->key_len);
- EVP_EncryptUpdate(&ctx, outpkt.salt, &outlen, inpkt->salt, inpkt->len + sizeof(inpkt->salt));
- EVP_EncryptFinal(&ctx, outpkt.salt + outlen, &outpad);
- outlen += outpad;
-
- total_socket_out += outlen;
-
- to.sin_family = AF_INET;
- to.sin_addr.s_addr = htonl(cl->address);
- to.sin_port = htons(cl->port);
-
- if((sendto(myself->socket, (char *) outpkt.salt, outlen, 0, (const struct sockaddr *)&to, tolen)) < 0)
- {
- syslog(LOG_ERR, _("Error sending packet to %s (%s): %m"),
- cl->name, cl->hostname);
- return;
- }
-cp
-}
+ avl_node_t *nnode, *nnext, *enode, *enext, *snode, *snext;
+ node_t *n;
+ edge_t *e;
+ subnet_t *s;
+
+ cp();
+
+ 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 = nnode->data;
+
+ if(!n->status.reachable) {
+ ifdebug(SCARY_THINGS) logger(LOG_DEBUG, _("Purging node %s (%s)"), n->name,
+ n->hostname);
+
+ for(snode = n->subnet_tree->head; snode; snode = snext) {
+ snext = snode->next;
+ 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 = enode->data;
+ if(!tunnelserver)
+ send_del_edge(broadcast, e);
+ edge_del(e);
+ }
+ }
+ }
-void receive_packet(connection_t *cl, vpn_packet_t *packet)
-{
-cp
- if(debug_lvl >= DEBUG_TRAFFIC)
- syslog(LOG_DEBUG, _("Received packet of %d bytes from %s (%s)"), packet->len, cl->name, cl->hostname);
+ /* Check if anyone else claims to have an edge to an unreachable node. If not, delete node. */
- route_incoming(cl, packet);
-cp
-}
+ for(nnode = node_tree->head; nnode; nnode = nnext) {
+ nnext = nnode->next;
+ n = nnode->data;
-void receive_udppacket(connection_t *cl, vpn_packet_t *inpkt)
-{
- vpn_packet_t outpkt;
- int outlen, outpad;
- EVP_CIPHER_CTX ctx;
-cp
- /* Decrypt the packet */
-
- EVP_DecryptInit(&ctx, myself->cipher_pkttype, myself->cipher_pktkey, myself->cipher_pktkey + myself->cipher_pkttype->key_len);
- EVP_DecryptUpdate(&ctx, outpkt.salt, &outlen, inpkt->salt, inpkt->len);
- EVP_DecryptFinal(&ctx, outpkt.salt + outlen, &outpad);
- outlen += outpad;
- outpkt.len = outlen - sizeof(outpkt.salt);
-
- total_socket_in += outlen;
-
- receive_packet(cl, &outpkt);
-cp
-}
+ if(!n->status.reachable) {
+ for(enode = edge_weight_tree->head; enode; enode = enext) {
+ enext = enode->next;
+ e = enode->data;
-void receive_tcppacket(connection_t *cl, char *buffer, int len)
-{
- vpn_packet_t outpkt;
-cp
- outpkt.len = len;
- memcpy(outpkt.data, buffer, len);
+ if(e->to == n)
+ break;
+ }
- receive_packet(cl, &outpkt);
-cp
-}
-
-void accept_packet(vpn_packet_t *packet)
-{
-cp
- if(debug_lvl >= DEBUG_TRAFFIC)
- syslog(LOG_DEBUG, _("Writing packet of %d bytes to tap device"),
- packet->len);
-
- if(taptype == TAP_TYPE_TUNTAP)
- {
- if(write(tap_fd, packet->data, packet->len) < 0)
- syslog(LOG_ERR, _("Can't write to tun/tap device: %m"));
- else
- total_tap_out += packet->len;
- }
- else /* ethertap */
- {
- if(write(tap_fd, packet->data - 2, packet->len + 2) < 0)
- syslog(LOG_ERR, _("Can't write to ethertap device: %m"));
- else
- total_tap_out += packet->len;
- }
-cp
+ if(!enode)
+ node_del(n);
+ }
+ }
}
/*
- send a packet to the given vpn ip.
+ put all file descriptors in an fd_set array
+ While we're at it, purge stuff that needs to be removed.
*/
-void send_packet(connection_t *cl, vpn_packet_t *packet)
-{
-cp
- if(debug_lvl >= DEBUG_TRAFFIC)
- syslog(LOG_ERR, _("Sending packet of %d bytes to %s (%s)"),
- packet->len, cl->name, cl->hostname);
-
- if(cl == myself)
- {
- if(debug_lvl >= DEBUG_TRAFFIC)
- {
- syslog(LOG_NOTICE, _("Packet is looping back to us!"));
- }
-
- return;
- }
-
- if(!cl->status.active)
- {
- if(debug_lvl >= DEBUG_TRAFFIC)
- syslog(LOG_INFO, _("%s (%s) is not active, dropping packet"),
- cl->name, cl->hostname);
-
- return;
- }
-
- /* Check if it has to go via TCP or UDP... */
-cp
- if((cl->options | myself->options) & OPTION_TCPONLY)
- {
- if(send_tcppacket(cl, packet))
- terminate_connection(cl);
- }
- else
- send_udppacket(cl, packet);
-}
-
-/* Broadcast a packet to all active connections */
-
-void broadcast_packet(connection_t *from, vpn_packet_t *packet)
+static int build_fdset(fd_set *readset, fd_set *writeset)
{
- avl_node_t *node;
- connection_t *cl;
-cp
- if(debug_lvl >= DEBUG_TRAFFIC)
- syslog(LOG_INFO, _("Broadcasting packet of %d bytes from %s (%s)"),
- packet->len, from->name, from->hostname);
-
- for(node = connection_tree->head; node; node = node->next)
- {
- cl = (connection_t *)node->data;
- if(cl->status.meta && cl != from)
- send_packet(cl, packet);
- }
-cp
-}
+ avl_node_t *node, *next;
+ connection_t *c;
+ int i, max = 0;
+
+ cp();
+
+ FD_ZERO(readset);
+ FD_ZERO(writeset);
+
+ for(node = connection_tree->head; node; node = next) {
+ next = node->next;
+ c = node->data;
+
+ if(c->status.remove) {
+ connection_del(c);
+ if(!connection_tree->head)
+ purge();
+ } else {
+ FD_SET(c->socket, readset);
+ if(c->outbuflen > 0)
+ FD_SET(c->socket, writeset);
+ if(c->socket > max)
+ max = c->socket;
+ }
+ }
-void flush_queue(connection_t *cl)
-{
- list_node_t *node, *next;
-cp
- if(debug_lvl >= DEBUG_TRAFFIC)
- syslog(LOG_INFO, _("Flushing queue for %s (%s)"), cl->name, cl->hostname);
-
- for(node = cl->queue->head; node; node = next)
- {
- next = node->next;
- send_udppacket(cl, (vpn_packet_t *)node->data);
- list_delete_node(cl->queue, node);
- }
-cp
-}
+ for(i = 0; i < listen_sockets; i++) {
+ FD_SET(listen_socket[i].tcp, readset);
+ if(listen_socket[i].tcp > max)
+ max = listen_socket[i].tcp;
+ FD_SET(listen_socket[i].udp, readset);
+ if(listen_socket[i].udp > max)
+ max = listen_socket[i].udp;
+ }
-/*
- open the local ethertap device
-*/
-int setup_tap_fd(void)
-{
- int nfd;
- const char *tapfname;
- config_t const *cfg;
-#ifdef HAVE_LINUX
-# ifdef HAVE_TUNTAP
- struct ifreq ifr;
-# endif
-#endif
-
-cp
- if((cfg = get_config_val(config, config_tapdevice)))
- tapfname = cfg->data.ptr;
- else
- {
-#ifdef HAVE_LINUX
-# ifdef HAVE_TUNTAP
- tapfname = "/dev/net/tun";
-# else
- tapfname = "/dev/tap0";
-# endif
-#endif
-#ifdef HAVE_FREEBSD
- tapfname = "/dev/tap0";
-#endif
-#ifdef HAVE_SOLARIS
- tapfname = "/dev/tun";
-#endif
- }
-cp
- if((nfd = open(tapfname, O_RDWR | O_NONBLOCK)) < 0)
- {
- syslog(LOG_ERR, _("Could not open %s: %m"), tapfname);
- return -1;
- }
-cp
- tap_fd = nfd;
-
- taptype = TAP_TYPE_ETHERTAP;
-
- /* Set default MAC address for ethertap devices */
-
- mymac.type = SUBNET_MAC;
- mymac.net.mac.address.x[0] = 0xfe;
- mymac.net.mac.address.x[1] = 0xfd;
- mymac.net.mac.address.x[2] = 0x00;
- mymac.net.mac.address.x[3] = 0x00;
- mymac.net.mac.address.x[4] = 0x00;
- mymac.net.mac.address.x[5] = 0x00;
-
-#ifdef HAVE_LINUX
- #ifdef HAVE_TUNTAP
- /* Ok now check if this is an old ethertap or a new tun/tap thingie */
- memset(&ifr, 0, sizeof(ifr));
-cp
- ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
- if (netname)
- strncpy(ifr.ifr_name, netname, IFNAMSIZ);
-cp
- if (!ioctl(tap_fd, TUNSETIFF, (void *) &ifr))
- {
- syslog(LOG_INFO, _("%s is a new style tun/tap device"), tapfname);
- taptype = TAP_TYPE_TUNTAP;
- }
- #endif
-#else
- taptype = TAP_TYPE_TUNTAP;
-#endif
-cp
- return 0;
+ FD_SET(device_fd, readset);
+ if(device_fd > max)
+ max = device_fd;
+
+ return max;
}
/*
- set up the socket that we listen on for incoming
- (tcp) connections
+ Terminate a connection:
+ - Close the socket
+ - Remove associated edge and tell other connections about it if report = true
+ - Check if we need to retry making an outgoing connection
+ - Deactivate the host
*/
-int setup_listen_meta_socket(int port)
+void terminate_connection(connection_t *c, bool report)
{
- int nfd, flags;
- struct sockaddr_in a;
- int option;
- config_t const *cfg;
-cp
- if((nfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
- {
- syslog(LOG_ERR, _("Creating metasocket failed: %m"));
- return -1;
- }
-
- flags = fcntl(nfd, F_GETFL);
- if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0)
- {
- close(nfd);
- syslog(LOG_ERR, _("System call `%s' failed: %m"),
- "fcntl");
- return -1;
- }
-
- /* Optimize TCP settings */
-
- option = 1;
- setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option));
- setsockopt(nfd, SOL_SOCKET, SO_KEEPALIVE, &option, sizeof(option));
-#ifdef HAVE_LINUX
- setsockopt(nfd, SOL_TCP, TCP_NODELAY, &option, sizeof(option));
-
- option = IPTOS_LOWDELAY;
- setsockopt(nfd, SOL_IP, IP_TOS, &option, sizeof(option));
-
- if((cfg = get_config_val(config, config_interface)))
- {
- if(setsockopt(nfd, SOL_SOCKET, SO_BINDTODEVICE, cfg->data.ptr, strlen(cfg->data.ptr)))
- {
- close(nfd);
- syslog(LOG_ERR, _("Unable to bind listen socket to interface %s: %m"), cfg->data.ptr);
- return -1;
- }
- }
-#endif
-
- memset(&a, 0, sizeof(a));
- a.sin_family = AF_INET;
- a.sin_port = htons(port);
-
- if((cfg = get_config_val(config, config_interfaceip)))
- a.sin_addr.s_addr = htonl(cfg->data.ip->address);
- else
- a.sin_addr.s_addr = htonl(INADDR_ANY);
-
- if(bind(nfd, (struct sockaddr *)&a, sizeof(struct sockaddr)))
- {
- close(nfd);
- syslog(LOG_ERR, _("Can't bind to port %hd/tcp: %m"), port);
- return -1;
- }
-
- if(listen(nfd, 3))
- {
- close(nfd);
- syslog(LOG_ERR, _("System call `%s' failed: %m"),
- "listen");
- return -1;
- }
-cp
- return nfd;
-}
+ cp();
-/*
- setup the socket for incoming encrypted
- data (the udp part)
-*/
-int setup_vpn_in_socket(int port)
-{
- int nfd, flags;
- struct sockaddr_in a;
- const int one = 1;
-cp
- if((nfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
- {
- close(nfd);
- syslog(LOG_ERR, _("Creating socket failed: %m"));
- return -1;
- }
-
- setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
-
- flags = fcntl(nfd, F_GETFL);
- if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0)
- {
- close(nfd);
- syslog(LOG_ERR, _("System call `%s' failed: %m"),
- "fcntl");
- return -1;
- }
-
- memset(&a, 0, sizeof(a));
- a.sin_family = AF_INET;
- a.sin_port = htons(port);
- a.sin_addr.s_addr = htonl(INADDR_ANY);
-
- if(bind(nfd, (struct sockaddr *)&a, sizeof(struct sockaddr)))
- {
- close(nfd);
- syslog(LOG_ERR, _("Can't bind to port %hd/udp: %m"), port);
- return -1;
- }
-cp
- return nfd;
-}
+ if(c->status.remove)
+ return;
-/*
- setup an outgoing meta (tcp) socket
-*/
-int setup_outgoing_meta_socket(connection_t *cl)
-{
- int flags;
- struct sockaddr_in a;
- config_t const *cfg;
- int option;
-cp
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_INFO, _("Trying to connect to %s"), cl->hostname);
-
- if((cfg = get_config_val(cl->config, config_port)) == NULL)
- cl->port = 655;
- else
- cl->port = cfg->data.val;
-
- cl->meta_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
- if(cl->meta_socket == -1)
- {
- syslog(LOG_ERR, _("Creating socket for %s port %d failed: %m"),
- cl->hostname, cl->port);
- return -1;
- }
-
- /* Bind first to get a fix on our source port */
-
- a.sin_family = AF_INET;
- a.sin_port = htons(0);
- a.sin_addr.s_addr = htonl(INADDR_ANY);
-
- if(bind(cl->meta_socket, (struct sockaddr *)&a, sizeof(struct sockaddr)))
- {
- close(cl->meta_socket);
- syslog(LOG_ERR, _("System call `%s' failed: %m"), "bind");
- return -1;
- }
-
- /* Optimize TCP settings */
-
- option = 1;
- setsockopt(cl->meta_socket, SOL_SOCKET, SO_KEEPALIVE, &option, sizeof(option));
-#ifdef HAVE_LINUX
- setsockopt(cl->meta_socket, SOL_TCP, TCP_NODELAY, &option, sizeof(option));
-
- option = IPTOS_LOWDELAY;
- setsockopt(cl->meta_socket, SOL_IP, IP_TOS, &option, sizeof(option));
-#endif
- /* Connect */
-
- a.sin_family = AF_INET;
- a.sin_port = htons(cl->port);
- a.sin_addr.s_addr = htonl(cl->address);
-
- if(connect(cl->meta_socket, (struct sockaddr *)&a, sizeof(a)) == -1)
- {
- close(cl->meta_socket);
- syslog(LOG_ERR, _("%s port %hd: %m"), cl->hostname, cl->port);
- return -1;
- }
-
- flags = fcntl(cl->meta_socket, F_GETFL);
- if(fcntl(cl->meta_socket, F_SETFL, flags | O_NONBLOCK) < 0)
- {
- close(cl->meta_socket);
- syslog(LOG_ERR, _("fcntl for %s port %d: %m"),
- cl->hostname, cl->port);
- return -1;
- }
-
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_INFO, _("Connected to %s port %hd"),
- cl->hostname, cl->port);
-
- cl->status.meta = 1;
-cp
- return 0;
-}
+ ifdebug(CONNECTIONS) logger(LOG_NOTICE, _("Closing connection with %s (%s)"),
+ c->name, c->hostname);
-/*
- Setup an outgoing meta connection.
-*/
-int setup_outgoing_connection(char *name)
-{
- connection_t *ncn;
- struct hostent *h;
- config_t const *cfg;
-cp
- if(check_id(name))
- {
- syslog(LOG_ERR, _("Invalid name for outgoing connection"));
- return -1;
- }
-
- ncn = new_connection();
- asprintf(&ncn->name, "%s", name);
-
- if(read_host_config(ncn))
- {
- syslog(LOG_ERR, _("Error reading host configuration file for %s"), ncn->name);
- free_connection(ncn);
- return -1;
- }
-
- if(!(cfg = get_config_val(ncn->config, config_address)))
- {
- syslog(LOG_ERR, _("No address specified for %s"), ncn->name);
- free_connection(ncn);
- return -1;
- }
-
- if(!(h = gethostbyname(cfg->data.ptr)))
- {
- syslog(LOG_ERR, _("Error looking up `%s': %m"), cfg->data.ptr);
- free_connection(ncn);
- return -1;
- }
-
- ncn->address = ntohl(*((ipv4_t*)(h->h_addr_list[0])));
- ncn->hostname = hostlookup(htonl(ncn->address));
-
- if(setup_outgoing_meta_socket(ncn) < 0)
- {
- syslog(LOG_ERR, _("Could not set up a meta connection to %s"),
- ncn->hostname);
- free_connection(ncn);
- return -1;
- }
-
- ncn->status.outgoing = 1;
- ncn->buffer = xmalloc(MAXBUFSIZE);
- ncn->buflen = 0;
- ncn->last_ping_time = time(NULL);
-
- connection_add(ncn);
-
- send_id(ncn);
-cp
- return 0;
-}
+ c->status.remove = true;
+ c->status.active = false;
-int read_rsa_public_key(connection_t *cl)
-{
- config_t const *cfg;
- FILE *fp;
- char *fname;
- void *result;
-cp
- if(!cl->rsa_key)
- cl->rsa_key = RSA_new();
-
- /* First, check for simple PublicKey statement */
-
- if((cfg = get_config_val(cl->config, config_publickey)))
- {
- BN_hex2bn(&cl->rsa_key->n, cfg->data.ptr);
- BN_hex2bn(&cl->rsa_key->e, "FFFF");
- return 0;
- }
-
- /* Else, check for PublicKeyFile statement and read it */
-
- if((cfg = get_config_val(cl->config, config_publickeyfile)))
- {
- if(is_safe_path(cfg->data.ptr))
- {
- if((fp = fopen(cfg->data.ptr, "r")) == NULL)
- {
- syslog(LOG_ERR, _("Error reading RSA public key file `%s': %m"),
- cfg->data.ptr);
- return -1;
- }
- result = PEM_read_RSAPublicKey(fp, &cl->rsa_key, NULL, NULL);
- fclose(fp);
- if(!result)
- {
- syslog(LOG_ERR, _("Reading RSA public key file `%s' failed: %m"),
- cfg->data.ptr);
- return -1;
- }
- return 0;
- }
- else
- return -1;
- }
-
- /* Else, check if a harnessed public key is in the config file */
-
- asprintf(&fname, "%s/hosts/%s", confbase, cl->name);
- if((fp = fopen(fname, "r")))
- {
- result = PEM_read_RSAPublicKey(fp, &cl->rsa_key, NULL, NULL);
- fclose(fp);
- free(fname);
- if(result)
- return 0;
- }
-
- free(fname);
-
- /* Nothing worked. */
-
- syslog(LOG_ERR, _("No public key for %s specified!"), cl->name);
-cp
- return -1;
-}
+ if(c->node)
+ c->node->connection = NULL;
-int read_rsa_private_key(void)
-{
- config_t const *cfg;
- FILE *fp;
- void *result;
-cp
- if(!myself->rsa_key)
- myself->rsa_key = RSA_new();
-
- if((cfg = get_config_val(config, config_privatekey)))
- {
- BN_hex2bn(&myself->rsa_key->d, cfg->data.ptr);
- BN_hex2bn(&myself->rsa_key->e, "FFFF");
- }
- else if((cfg = get_config_val(config, config_privatekeyfile)))
- {
- if((fp = fopen(cfg->data.ptr, "r")) == NULL)
- {
- syslog(LOG_ERR, _("Error reading RSA private key file `%s': %m"),
- cfg->data.ptr);
- return -1;
- }
- result = PEM_read_RSAPrivateKey(fp, &myself->rsa_key, NULL, NULL);
- fclose(fp);
- if(!result)
- {
- syslog(LOG_ERR, _("Reading RSA private key file `%s' failed: %m"),
- cfg->data.ptr);
- return -1;
- }
- }
- else
- {
- syslog(LOG_ERR, _("No private key for tinc daemon specified!"));
- return -1;
- }
-cp
- return 0;
-}
+ if(c->socket)
+ closesocket(c->socket);
-/*
- Configure connection_t myself and set up the local sockets (listen only)
-*/
-int setup_myself(void)
-{
- config_t const *cfg;
- config_t *next;
- subnet_t *net;
-cp
- myself = new_connection();
-
- asprintf(&myself->hostname, _("MYSELF"));
- myself->options = 0;
- myself->protocol_version = PROT_CURRENT;
-
- if(!(cfg = get_config_val(config, config_name))) /* Not acceptable */
- {
- syslog(LOG_ERR, _("Name for tinc daemon required!"));
- return -1;
- }
- else
- asprintf(&myself->name, "%s", (char*)cfg->data.val);
-
- if(check_id(myself->name))
- {
- syslog(LOG_ERR, _("Invalid name for myself!"));
- return -1;
- }
-cp
- if(read_rsa_private_key())
- return -1;
-
- if(read_host_config(myself))
- {
- syslog(LOG_ERR, _("Cannot open host configuration file for myself!"));
- return -1;
- }
-
- if(read_rsa_public_key(myself))
- return -1;
-cp
+ if(c->edge) {
+ if(report && !tunnelserver)
+ send_del_edge(broadcast, c->edge);
-/*
- if(RSA_check_key(myself->rsa_key) != 1)
- {
- syslog(LOG_ERR, _("Invalid public/private keypair!"));
- return -1;
- }
-*/
- if(!(cfg = get_config_val(myself->config, config_port)))
- myself->port = 655;
- else
- myself->port = cfg->data.val;
-
-/* Read in all the subnets specified in the host configuration file */
-
- for(next = myself->config; (cfg = get_config_val(next, config_subnet)); next = cfg->next)
- {
- net = new_subnet();
- net->type = SUBNET_IPV4;
- net->net.ipv4.address = cfg->data.ip->address;
- net->net.ipv4.mask = cfg->data.ip->mask;
-
- /* Teach newbies what subnets are... */
-
- if((net->net.ipv4.address & net->net.ipv4.mask) != net->net.ipv4.address)
- {
- syslog(LOG_ERR, _("Network address and subnet mask do not match!"));
- return -1;
- }
-
- subnet_add(myself, net);
- }
-
-cp
- /* Check some options */
-
- if((cfg = get_config_val(config, config_indirectdata)))
- if(cfg->data.val == stupid_true)
- myself->options |= OPTION_INDIRECT;
-
- if((cfg = get_config_val(config, config_tcponly)))
- if(cfg->data.val == stupid_true)
- myself->options |= OPTION_TCPONLY;
-
- if((cfg = get_config_val(myself->config, config_indirectdata)))
- if(cfg->data.val == stupid_true)
- myself->options |= OPTION_INDIRECT;
-
- if((cfg = get_config_val(myself->config, config_tcponly)))
- if(cfg->data.val == stupid_true)
- myself->options |= OPTION_TCPONLY;
-
- if(myself->options & OPTION_TCPONLY)
- myself->options |= OPTION_INDIRECT;
-
- if((cfg = get_config_val(config, config_mode)))
- {
- if(!strcasecmp(cfg->data.ptr, "router"))
- routing_mode = RMODE_ROUTER;
- else if (!strcasecmp(cfg->data.ptr, "switch"))
- routing_mode = RMODE_SWITCH;
- else if (!strcasecmp(cfg->data.ptr, "hub"))
- routing_mode = RMODE_HUB;
- else
- {
- syslog(LOG_ERR, _("Invalid routing mode!"));
- return -1;
- }
- }
- else
- routing_mode = RMODE_ROUTER;
-
-cp
- /* Open sockets */
-
- if((myself->meta_socket = setup_listen_meta_socket(myself->port)) < 0)
- {
- syslog(LOG_ERR, _("Unable to set up a listening TCP socket!"));
- return -1;
- }
-
- if((myself->socket = setup_vpn_in_socket(myself->port)) < 0)
- {
- syslog(LOG_ERR, _("Unable to set up a listening UDP socket!"));
- return -1;
- }
-cp
- /* Generate packet encryption key */
-
- myself->cipher_pkttype = EVP_bf_cbc();
-
- myself->cipher_pktkeylength = myself->cipher_pkttype->key_len + myself->cipher_pkttype->iv_len;
-
- myself->cipher_pktkey = (char *)xmalloc(myself->cipher_pktkeylength);
- RAND_pseudo_bytes(myself->cipher_pktkey, myself->cipher_pktkeylength);
-
- if(!(cfg = get_config_val(config, config_keyexpire)))
- keylifetime = 3600;
- else
- keylifetime = cfg->data.val;
-
- keyexpires = time(NULL) + keylifetime;
-cp
-
- /* Activate ourselves */
-
- myself->status.active = 1;
-
- syslog(LOG_NOTICE, _("Ready: listening on port %hd"), myself->port);
-cp
- return 0;
-}
+ edge_del(c->edge);
-RETSIGTYPE
-sigalrm_handler(int a)
-{
- config_t const *cfg;
-cp
- cfg = get_config_val(upstreamcfg, config_connectto);
-
- if(!cfg)
- {
- if(upstreamcfg == config)
- {
- /* No upstream IP given, we're listen only. */
- signal(SIGALRM, SIG_IGN);
- return;
- }
- }
- else
- {
- /* We previously tried all the ConnectTo lines. Now wrap back to the first. */
- cfg = get_config_val(config, config_connectto);
- }
-
- while(cfg)
- {
- upstreamcfg = cfg->next;
- if(!setup_outgoing_connection(cfg->data.ptr)) /* function returns 0 when there are no problems */
- {
- signal(SIGALRM, SIG_IGN);
- return;
- }
- cfg = get_config_val(upstreamcfg, config_connectto); /* Or else we try the next ConnectTo line */
- }
-
- signal(SIGALRM, sigalrm_handler);
- upstreamcfg = config;
- seconds_till_retry += 5;
- if(seconds_till_retry > MAXTIMEOUT) /* Don't wait more than MAXTIMEOUT seconds. */
- seconds_till_retry = MAXTIMEOUT;
- syslog(LOG_ERR, _("Still failed to connect to other, will retry in %d seconds"),
- seconds_till_retry);
- alarm(seconds_till_retry);
-cp
-}
+ /* Run MST and SSSP algorithms */
-/*
- setup all initial network connections
-*/
-int setup_network_connections(void)
-{
- config_t const *cfg;
-cp
- init_connections();
- init_subnets();
-
- if((cfg = get_config_val(config, config_pingtimeout)) == NULL)
- timeout = 60;
- else
- {
- timeout = cfg->data.val;
- if(timeout < 1)
- {
- timeout = 86400;
- }
- }
-
- if(setup_tap_fd() < 0)
- return -1;
-
- /* Run tinc-up script to further initialize the tap interface */
- execute_script("tinc-up");
-
- if(setup_myself() < 0)
- return -1;
-
- if(!(cfg = get_config_val(config, config_connectto)))
- /* No upstream IP given, we're listen only. */
- return 0;
-
- while(cfg)
- {
- upstreamcfg = cfg->next;
- if(!setup_outgoing_connection(cfg->data.ptr)) /* function returns 0 when there are no problems */
- return 0;
- cfg = get_config_val(upstreamcfg, config_connectto); /* Or else we try the next ConnectTo line */
- }
-
- if(do_detach)
- {
- signal(SIGALRM, sigalrm_handler);
- upstreamcfg = config;
- seconds_till_retry = MAXTIMEOUT;
- syslog(LOG_NOTICE, _("Trying to re-establish outgoing connection in %d seconds"), seconds_till_retry);
- alarm(seconds_till_retry);
- }
- else
- return -1;
-
-cp
- return 0;
-}
+ graph();
-/*
- close all open network connections
-*/
-void close_network_connections(void)
-{
- avl_node_t *node;
- connection_t *p;
-cp
- for(node = connection_tree->head; node; node = node->next)
- {
- p = (connection_t *)node->data;
- p->status.outgoing = 0;
- p->status.active = 0;
- terminate_connection(p);
- }
-
- if(myself)
- if(myself->status.active)
- {
- close(myself->meta_socket);
- free_connection(myself);
- myself = NULL;
- }
-
- execute_script("tinc-down");
-
- close(tap_fd);
-
- destroy_connection_tree();
-cp
- return;
-}
+ /* If the node is not reachable anymore but we remember it had an edge to us, clean it up */
-/*
- handle an incoming tcp connect call and open
- a connection to it.
-*/
-connection_t *create_new_connection(int sfd)
-{
- connection_t *p;
- struct sockaddr_in ci;
- int len = sizeof(ci);
-cp
- p = new_connection();
-
- if(getpeername(sfd, (struct sockaddr *) &ci, (socklen_t *) &len) < 0)
- {
- syslog(LOG_ERR, _("System call `%s' failed: %m"),
- "getpeername");
- close(sfd);
- return NULL;
- }
-
- asprintf(&p->name, _("UNKNOWN"));
- p->address = ntohl(ci.sin_addr.s_addr);
- p->hostname = hostlookup(ci.sin_addr.s_addr);
- p->port = htons(ci.sin_port); /* This one will be overwritten later */
- p->meta_socket = sfd;
- p->status.meta = 1;
- p->buffer = xmalloc(MAXBUFSIZE);
- p->buflen = 0;
- p->last_ping_time = time(NULL);
-
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_NOTICE, _("Connection from %s port %d"),
- p->hostname, htons(ci.sin_port));
-
- p->allow_request = ID;
-cp
- return p;
-}
+ 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);
+ }
+ }
+ }
-/*
- put all file descriptors in an fd_set array
-*/
-void build_fdset(fd_set *fs)
-{
- avl_node_t *node;
- connection_t *p;
-cp
- FD_ZERO(fs);
-
- FD_SET(myself->socket, fs);
-
- for(node = connection_tree->head; node; node = node->next)
- {
- p = (connection_t *)node->data;
- if(p->status.meta)
- FD_SET(p->meta_socket, fs);
- }
-
- FD_SET(myself->meta_socket, fs);
- FD_SET(tap_fd, fs);
-cp
-}
+ /* Check if this was our outgoing connection */
-/*
- receive incoming data from the listening
- udp socket and write it to the ethertap
- device after being decrypted
-*/
-void handle_incoming_vpn_data(void)
-{
- vpn_packet_t pkt;
- int x, l = sizeof(x);
- struct sockaddr_in from;
- socklen_t fromlen = sizeof(from);
- connection_t *cl;
-cp
- if(getsockopt(myself->socket, SOL_SOCKET, SO_ERROR, &x, &l) < 0)
- {
- syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m"),
- __FILE__, __LINE__, myself->socket);
- return;
- }
- if(x)
- {
- syslog(LOG_ERR, _("Incoming data socket error: %s"), strerror(x));
- return;
- }
-
- if((pkt.len = recvfrom(myself->socket, (char *) pkt.salt, MTU, 0, (struct sockaddr *)&from, &fromlen)) <= 0)
- {
- syslog(LOG_ERR, _("Receiving packet failed: %m"));
- return;
- }
-
- cl = lookup_active(ntohl(from.sin_addr.s_addr), ntohs(from.sin_port));
-
- if(!cl)
- {
- syslog(LOG_WARNING, _("Received UDP packets on port %hd from unknown source %x:%hd"), myself->port, ntohl(from.sin_addr.s_addr), ntohs(from.sin_port));
- return;
- }
-
- cl->last_ping_time = time(NULL);
-
- receive_udppacket(cl, &pkt);
-cp
-}
+ if(c->outgoing) {
+ retry_outgoing(c->outgoing);
+ c->outgoing = NULL;
+ }
-/*
- terminate a connection and notify the other
- end before closing the sockets
-*/
-void terminate_connection(connection_t *cl)
-{
- connection_t *p;
- subnet_t *subnet;
- avl_node_t *node, *next;
-cp
- if(cl->status.remove)
- return;
-
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_NOTICE, _("Closing connection with %s (%s)"),
- cl->name, cl->hostname);
-
- cl->status.remove = 1;
-
- if(cl->socket)
- close(cl->socket);
- if(cl->status.meta)
- close(cl->meta_socket);
-
- if(cl->status.meta)
- {
-
- /* Find all connections that were lost because they were behind cl
- (the connection that was dropped). */
-
- for(node = connection_tree->head; node; node = node->next)
- {
- p = (connection_t *)node->data;
- if(p->nexthop == cl && p != cl)
- terminate_connection(p);
- }
-
- /* Inform others of termination if it was still active */
-
- if(cl->status.active)
- for(node = connection_tree->head; node; node = node->next)
- {
- p = (connection_t *)node->data;
- if(p->status.meta && p->status.active && p != cl)
- send_del_host(p, cl); /* Sounds like recursion, but p does not have a meta connection :) */
- }
- }
-
- /* Remove the associated subnets */
-
- for(node = cl->subnet_tree->head; node; node = next)
- {
- next = node->next;
- subnet = (subnet_t *)node->data;
- subnet_del(subnet);
- }
-
- /* Check if this was our outgoing connection */
-
- if(cl->status.outgoing)
- {
- cl->status.outgoing = 0;
- signal(SIGALRM, sigalrm_handler);
- alarm(seconds_till_retry);
- syslog(LOG_NOTICE, _("Trying to re-establish outgoing connection in %d seconds"), seconds_till_retry);
- }
-
- /* Deactivate */
-
- cl->status.active = 0;
-cp
+ free(c->outbuf);
+ c->outbuf = NULL;
+ c->outbuflen = 0;
+ c->outbufsize = 0;
+ c->outbufstart = 0;
}
/*
end does not reply in time, we consider them dead
and close the connection.
*/
-void check_dead_connections(void)
-{
- time_t now;
- avl_node_t *node;
- connection_t *cl;
-cp
- now = time(NULL);
-
- for(node = connection_tree->head; node; node = node->next)
- {
- cl = (connection_t *)node->data;
- if(cl->status.active && cl->status.meta)
- {
- if(cl->last_ping_time + timeout < now)
- {
- if(cl->status.pinged)
- {
- if(debug_lvl >= DEBUG_PROTOCOL)
- syslog(LOG_INFO, _("%s (%s) didn't respond to PING"),
- cl->name, cl->hostname);
- cl->status.timeout = 1;
- terminate_connection(cl);
- }
- else
- {
- send_ping(cl);
- }
- }
- }
- }
-cp
-}
-
-/*
- accept a new tcp connect and create a
- new connection
-*/
-int handle_new_meta_connection()
+static void check_dead_connections(void)
{
- connection_t *ncn;
- struct sockaddr client;
- int nfd, len = sizeof(client);
-cp
- if((nfd = accept(myself->meta_socket, &client, &len)) < 0)
- {
- syslog(LOG_ERR, _("Accepting a new connection failed: %m"));
- return -1;
- }
-
- if(!(ncn = create_new_connection(nfd)))
- {
- shutdown(nfd, 2);
- close(nfd);
- syslog(LOG_NOTICE, _("Closed attempted connection"));
- return 0;
- }
-
- connection_add(ncn);
-
- send_id(ncn);
-cp
- return 0;
+ avl_node_t *node, *next;
+ connection_t *c;
+
+ cp();
+
+ for(node = connection_tree->head; node; node = next) {
+ next = node->next;
+ c = node->data;
+
+ if(c->last_ping_time + pingtimeout < now) {
+ if(c->status.active) {
+ if(c->status.pinged) {
+ ifdebug(CONNECTIONS) logger(LOG_INFO, _("%s (%s) didn't respond to PING in %d seconds"),
+ c->name, c->hostname, now - c->last_ping_time);
+ c->status.timeout = true;
+ terminate_connection(c, true);
+ } else if(c->last_ping_time + pinginterval < now) {
+ send_ping(c);
+ }
+ } else {
+ if(c->status.remove) {
+ logger(LOG_WARNING, _("Old connection_t for %s (%s) status %04x still lingering, deleting..."),
+ c->name, c->hostname, *(uint32_t *)&c->status);
+ connection_del(c);
+ continue;
+ }
+ ifdebug(CONNECTIONS) logger(LOG_WARNING, _("Timeout from %s (%s) during authentication"),
+ c->name, c->hostname);
+ if(c->status.connecting) {
+ c->status.connecting = false;
+ closesocket(c->socket);
+ do_outgoing_connection(c);
+ } else {
+ terminate_connection(c, false);
+ }
+ }
+ }
+
+ if(c->outbuflen > 0 && c->last_flushed_time + pingtimeout < now) {
+ if(c->status.active) {
+ ifdebug(CONNECTIONS) logger(LOG_INFO,
+ _("%s (%s) could not flush for %d seconds (%d bytes remaining)"),
+ c->name, c->hostname, now - c->last_flushed_time, c->outbuflen);
+ c->status.timeout = true;
+ terminate_connection(c, true);
+ }
+ }
+ }
}
/*
check all connections to see if anything
happened on their sockets
*/
-void check_network_activity(fd_set *f)
+static void check_network_activity(fd_set * readset, fd_set * writeset)
{
- connection_t *p;
- avl_node_t *node;
-cp
- if(FD_ISSET(myself->socket, f))
- handle_incoming_vpn_data();
-
- for(node = connection_tree->head; node; node = node->next)
- {
- p = (connection_t *)node->data;
-
- if(p->status.remove)
- return;
-
- if(p->status.meta)
- if(FD_ISSET(p->meta_socket, f))
- if(receive_meta(p) < 0)
- {
- terminate_connection(p);
- return;
- }
- }
-
- if(FD_ISSET(myself->meta_socket, f))
- handle_new_meta_connection();
-cp
-}
+ connection_t *c;
+ avl_node_t *node;
+ int result, i;
+ socklen_t len = sizeof(result);
+ vpn_packet_t packet;
+
+ cp();
+
+ /* check input from kernel */
+ if(FD_ISSET(device_fd, readset)) {
+ if(read_packet(&packet))
+ route(myself, &packet);
+ }
-/*
- read, encrypt and send data that is
- available through the ethertap device
-*/
-void handle_tap_input(void)
-{
- vpn_packet_t vp;
- int lenin;
-cp
- if(taptype == TAP_TYPE_TUNTAP)
- {
- if((lenin = read(tap_fd, vp.data, MTU)) <= 0)
- {
- syslog(LOG_ERR, _("Error while reading from tun/tap device: %m"));
- return;
- }
- vp.len = lenin;
- }
- else /* ethertap */
- {
- if((lenin = read(tap_fd, vp.data - 2, MTU)) <= 0)
- {
- syslog(LOG_ERR, _("Error while reading from ethertap device: %m"));
- return;
- }
- vp.len = lenin - 2;
- }
-
- total_tap_in += vp.len;
-
- if(lenin < 32)
- {
- if(debug_lvl >= DEBUG_TRAFFIC)
- syslog(LOG_WARNING, _("Received short packet from tap device"));
- return;
- }
-
- if(debug_lvl >= DEBUG_TRAFFIC)
- {
- syslog(LOG_DEBUG, _("Read packet of length %d from tap device"), vp.len);
- }
-
- route_outgoing(&vp);
-cp
+ /* check meta connections */
+ for(node = connection_tree->head; node; node = node->next) {
+ c = node->data;
+
+ if(c->status.remove)
+ continue;
+
+ if(FD_ISSET(c->socket, readset)) {
+ if(c->status.connecting) {
+ c->status.connecting = false;
+ getsockopt(c->socket, SOL_SOCKET, SO_ERROR, &result, &len);
+
+ if(!result)
+ finish_connecting(c);
+ else {
+ ifdebug(CONNECTIONS) logger(LOG_DEBUG,
+ _("Error while connecting to %s (%s): %s"),
+ c->name, c->hostname, strerror(result));
+ closesocket(c->socket);
+ do_outgoing_connection(c);
+ continue;
+ }
+ }
+
+ if(!receive_meta(c)) {
+ terminate_connection(c, c->status.active);
+ continue;
+ }
+ }
+
+ if(FD_ISSET(c->socket, writeset)) {
+ if(!flush_meta(c)) {
+ terminate_connection(c, c->status.active);
+ continue;
+ }
+ }
+ }
+
+ for(i = 0; i < listen_sockets; i++) {
+ if(FD_ISSET(listen_socket[i].udp, readset))
+ handle_incoming_vpn_data(listen_socket[i].udp);
+
+ if(FD_ISSET(listen_socket[i].tcp, readset))
+ handle_new_meta_connection(listen_socket[i].tcp);
+ }
}
/*
this is where it all happens...
*/
-void main_loop(void)
+int main_loop(void)
{
- fd_set fset;
- struct timeval tv;
- int r;
- time_t last_ping_check;
- int t;
-cp
- last_ping_check = time(NULL);
-
- for(;;)
- {
- tv.tv_sec = timeout;
- tv.tv_usec = 0;
-
- prune_connection_tree();
- build_fdset(&fset);
-
- if((r = select(FD_SETSIZE, &fset, NULL, NULL, &tv)) < 0)
- {
- if(errno != EINTR) /* because of alarm */
- {
- syslog(LOG_ERR, _("Error while waiting for input: %m"));
- return;
- }
- }
-
- if(sighup)
- {
- syslog(LOG_INFO, _("Rereading configuration file and restarting in 5 seconds"));
- sighup = 0;
- close_network_connections();
- clear_config(&config);
-
- if(read_server_config())
- {
- syslog(LOG_ERR, _("Unable to reread configuration file, exiting"));
- exit(1);
- }
-
- sleep(5);
-
- if(setup_network_connections())
- return;
-
- continue;
- }
-
- t = time(NULL);
-
- /* Let's check if everybody is still alive */
-
- if(last_ping_check + timeout < t)
- {
- check_dead_connections();
- last_ping_check = time(NULL);
-
- /* Should we regenerate our key? */
-
- if(keyexpires < t)
- {
- if(debug_lvl >= DEBUG_STATUS)
- syslog(LOG_INFO, _("Regenerating symmetric key"));
-
- RAND_pseudo_bytes(myself->cipher_pktkey, myself->cipher_pktkeylength);
- send_key_changed(myself, NULL);
- keyexpires = time(NULL) + keylifetime;
- }
- }
+ fd_set readset, writeset;
+ struct timeval tv;
+ int r, maxfd;
+ time_t last_ping_check, last_config_check;
+ event_t *event;
- if(r > 0)
- {
- check_network_activity(&fset);
+ cp();
+
+ last_ping_check = now;
+ last_config_check = now;
+ srand(now);
+
+ running = true;
+
+ while(running) {
+ now = time(NULL);
+
+ // tv.tv_sec = 1 + (rand() & 7); /* Approx. 5 seconds, randomized to prevent global synchronisation effects */
+ tv.tv_sec = 1;
+ tv.tv_usec = 0;
+
+ maxfd = build_fdset(&readset, &writeset);
+
+ r = select(maxfd + 1, &readset, &writeset, NULL, &tv);
+
+ if(r < 0) {
+ if(errno != EINTR && errno != EAGAIN) {
+ logger(LOG_ERR, _("Error while waiting for input: %s"),
+ strerror(errno));
+ cp_trace();
+ dump_connections();
+ return 1;
+ }
+
+ continue;
+ }
+
+ check_network_activity(&readset, &writeset);
+
+ if(do_purge) {
+ purge();
+ do_purge = false;
+ }
+
+ /* 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_subnets();
+
+ age_past_requests();
+
+ /* Should we regenerate our key? */
+
+ if(keyexpires < now) {
+ ifdebug(STATUS) logger(LOG_INFO, _("Regenerating symmetric key"));
+
+ RAND_pseudo_bytes((unsigned char *)myself->key, myself->keylength);
+ if(myself->cipher)
+ EVP_DecryptInit_ex(&packet_ctx, myself->cipher, NULL, (unsigned char *)myself->key, (unsigned char *)myself->key + myself->cipher->key_len);
+ send_key_changed(broadcast, myself);
+ keyexpires = now + keylifetime;
+ }
+ }
+
+
+ while((event = get_expired_event())) {
+ event->handler(event->data);
+ free(event);
+ }
+
+ if(sigalrm) {
+ logger(LOG_INFO, _("Flushing event queue"));
+
+ while(event_tree->head) {
+ event = event_tree->head->data;
+ event->handler(event->data);
+ event_del(event);
+ }
+ sigalrm = false;
+ }
+
+ if(sighup) {
+ connection_t *c;
+ avl_node_t *node;
+ char *fname;
+ struct stat s;
+
+ sighup = false;
+
+ /* Reread our own configuration file */
+
+ exit_configuration(&config_tree);
+ init_configuration(&config_tree);
+
+ if(!read_server_config()) {
+ logger(LOG_ERR, _("Unable to reread configuration file, exitting."));
+ 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 = node->data;
+
+ if(c->outgoing) {
+ free(c->outgoing->name);
+ freeaddrinfo(c->outgoing->ai);
+ free(c->outgoing);
+ c->outgoing = NULL;
+ }
+
+ asprintf(&fname, "%s/hosts/%s", confbase, c->name);
+ if(stat(fname, &s) || s.st_mtime > last_config_check)
+ terminate_connection(c, c->status.active);
+ free(fname);
+ }
+
+ last_config_check = now;
+
+ /* Try to make outgoing connections */
+
+ try_outgoing_connections();
+ }
+ }
- /* local tap data */
- if(FD_ISSET(tap_fd, &fset))
- handle_tap_input();
- }
- }
-cp
+ return 0;
}
projects / tinc / blobdiff