along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: net.c,v 1.35.4.113 2001/06/05 19:45:47 guus Exp $
+ $Id: net.c,v 1.35.4.131 2001/09/24 14:12:00 guus Exp $
*/
#include "config.h"
#include <sys/socket.h>
#include <net/if.h>
-#ifdef HAVE_OPENSSL_RAND_H
-# include <openssl/rand.h>
-#else
-# include <rand.h>
-#endif
-
-#ifdef HAVE_OPENSSL_EVP_H
-# include <openssl/evp.h>
-#else
-# include <evp.h>
-#endif
+#include <openssl/rand.h>
+#include <openssl/evp.h>
+#include <openssl/pem.h>
-#ifdef HAVE_OPENSSL_ERR_H
-# include <openssl/err.h>
-#else
-# include <err.h>
+#ifndef HAVE_RAND_PSEUDO_BYTES
+#define RAND_pseudo_bytes RAND_bytes
#endif
-#ifdef HAVE_OPENSSL_PEM_H
-# include <openssl/pem.h>
-#else
-# include <pem.h>
+#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
-#ifdef HAVE_TUNTAP
-#include LINUX_IF_TUN_H
+#ifdef HAVE_SOLARIS
+ #include <sys/sockio.h>
+ #include <sys/stropts.h>
+ #include <net/if_tun.h>
#endif
#include <utils.h>
int total_socket_in = 0;
int total_socket_out = 0;
-config_t *upstreamcfg;
-static int seconds_till_retry;
+int seconds_till_retry = 5;
int keylifetime = 0;
int keyexpires = 0;
/* Encrypt the packet. */
- RAND_bytes(inpkt->salt, sizeof(inpkt->salt));
+ 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));
syslog(LOG_DEBUG, _("Writing packet of %d bytes to tap device"),
packet->len);
+#ifdef HAVE_SOLARIS
+ if(write(tap_fd, packet->data + 14, packet->len - 14) < 0)
+ syslog(LOG_ERR, _("Can't write to tun/tap device: %m"));
+ else
+ total_tap_out += packet->len;
+#else
if(taptype == TAP_TYPE_TUNTAP)
{
if(write(tap_fd, packet->data, packet->len) < 0)
else
total_tap_out += packet->len;
}
+#endif
cp
}
*/
void send_packet(connection_t *cl, vpn_packet_t *packet)
{
+ connection_t *hop;
cp
if(debug_lvl >= DEBUG_TRAFFIC)
syslog(LOG_ERR, _("Sending packet of %d bytes to %s (%s)"),
return;
}
- /* Check if it has to go via TCP or UDP... */
-cp
- if((cl->options | myself->options) & OPTION_TCPONLY)
+ if(myself->options & OPTION_TCPONLY)
{
- if(send_tcppacket(cl, packet))
- terminate_connection(cl);
+ if(send_tcppacket(cl->nexthop, packet))
+ terminate_connection(cl->nexthop, 1);
}
else
- send_udppacket(cl, packet);
+ {
+ if(myself->options & OPTION_INDIRECT)
+ send_udppacket(cl->nexthop, packet);
+ else
+ {
+ hop = cl;
+
+ while(hop->options & OPTION_INDIRECT)
+ if(hop->lastbutonehop == myself)
+ break;
+ else
+ hop = hop->lastbutonehop;
+
+ send_udppacket(hop, packet);
+ }
+ }
}
-/* Broadcast a packet to all active connections */
+/* Broadcast a packet to all active direct connections */
void broadcast_packet(connection_t *from, vpn_packet_t *packet)
{
for(node = connection_tree->head; node; node = node->next)
{
cl = (connection_t *)node->data;
- if(cl->status.meta && cl != from)
+ if(cl->status.active && cl != from)
send_packet(cl, packet);
}
cp
struct ifreq ifr;
# endif
#endif
+#ifdef HAVE_SOLARIS
+ int ip_fd = -1, if_fd = -1;
+ int ppa;
+ char *ptr;
+#endif
cp
if((cfg = get_config_val(config, config_tapdevice)))
cp
tap_fd = nfd;
- taptype = TAP_TYPE_ETHERTAP;
-
/* Set default MAC address for ethertap devices */
mymac.type = SUBNET_MAC;
cp
if (!ioctl(tap_fd, TUNSETIFF, (void *) &ifr))
{
- syslog(LOG_INFO, _("%s is a new style tun/tap device"), tapfname);
+ syslog(LOG_INFO, _("%s is a Linux tun/tap device"), tapfname);
taptype = TAP_TYPE_TUNTAP;
}
+ else
+ if (!ioctl(tap_fd, (('T'<< 8) | 202), (void *) &ifr))
+ {
+ syslog(LOG_INFO, _("%s is a Linux tun/tap device"), tapfname);
+ syslog(LOG_WARNING, _("Old ioctl() request used"));
+ taptype = TAP_TYPE_TUNTAP;
+ }
+ else
#endif
+ {
+ syslog(LOG_INFO, _("%s is a Linux ethertap device"), tapfname);
+ taptype = TAP_TYPE_ETHERTAP;
+ }
#endif
#ifdef HAVE_FREEBSD
+ syslog(LOG_INFO, _("%s is a FreeBSD tap device"), tapfname);
taptype = TAP_TYPE_TUNTAP;
#endif
+#ifdef HAVE_SOLARIS
+ ppa = 0;
+
+ ptr = tapfname;
+ while(*ptr && !isdigit((int)*ptr)) ptr++;
+ ppa = atoi(ptr);
+
+ if( (ip_fd = open("/dev/ip", O_RDWR, 0)) < 0){
+ syslog(LOG_ERR, _("Could not open /dev/ip: %m"));
+ return -1;
+ }
+
+ /* Assign a new PPA and get its unit number. */
+ if( (ppa = ioctl(nfd, TUNNEWPPA, ppa)) < 0){
+ syslog(LOG_ERR, _("Can't assign new interface: %m"));
+ return -1;
+ }
+
+ if( (if_fd = open(tapfname, O_RDWR, 0)) < 0){
+ syslog(LOG_ERR, _("Could not open %s twice: %m"), tapfname);
+ return -1;
+ }
+
+ if(ioctl(if_fd, I_PUSH, "ip") < 0){
+ syslog(LOG_ERR, _("Can't push IP module: %m"));
+ return -1;
+ }
+
+ /* Assign ppa according to the unit number returned by tun device */
+ if(ioctl(if_fd, IF_UNITSEL, (char *)&ppa) < 0){
+ syslog(LOG_ERR, _("Can't set PPA %d: %m"), ppa);
+ return -1;
+ }
+
+ if(ioctl(ip_fd, I_LINK, if_fd) < 0){
+ syslog(LOG_ERR, _("Can't link TUN device to IP: %m"));
+ return -1;
+ }
+
+ syslog(LOG_INFO, _("%s is a Solaris tun device"), tapfname);
+#endif
+
cp
return 0;
}
*/
int setup_outgoing_connection(char *name)
{
- connection_t *ncn;
+ connection_t *ncn, *old;
struct hostent *h;
config_t const *cfg;
cp
return -1;
}
+ /* Make sure we don't make an outgoing connection to a host that is already in our connection list */
+
+ if((old = lookup_id(name)))
+ {
+ if(!old->status.outgoing)
+ {
+ if(debug_lvl >= DEBUG_CONNECTIONS)
+ syslog(LOG_NOTICE, _("We are already connected to %s."), name);
+
+ old->status.outgoing = 1;
+ }
+ return 0;
+ }
+
ncn = new_connection();
asprintf(&ncn->name, "%s", name);
keyexpires = time(NULL) + keylifetime;
cp
-
- /* Activate ourselves */
+ /* Done */
myself->status.active = 1;
+ id_add(myself);
syslog(LOG_NOTICE, _("Ready: listening on port %hd"), myself->port);
cp
return 0;
}
+void randomized_alarm(int seconds)
+{
+ unsigned char r;
+ RAND_pseudo_bytes(&r, 1);
+ alarm((seconds * (int)r) / 128 + 1);
+}
+
RETSIGTYPE
-sigalrm_handler(int a)
+try_outgoing_connections(int a)
{
config_t const *cfg;
+ int retry = 0;
cp
- cfg = get_config_val(upstreamcfg, config_connectto);
+ cfg = get_config_val(config, config_connectto);
- if(!cfg)
+ while(cfg)
{
- if(upstreamcfg == config)
- {
- /* No upstream IP given, we're listen only. */
- signal(SIGALRM, SIG_IGN);
- return;
- }
+ if(setup_outgoing_connection(cfg->data.ptr)) /* function returns 0 when there are no problems */
+ retry = 1;
+ cfg = get_config_val(cfg, config_connectto); /* Or else we try the next ConnectTo line */
}
- else
+
+ if(retry)
{
- /* We previously tried all the ConnectTo lines. Now wrap back to the first. */
- cfg = get_config_val(config, config_connectto);
+ seconds_till_retry += 5;
+ if(seconds_till_retry > MAXTIMEOUT) /* Don't wait more than MAXTIMEOUT seconds. */
+ seconds_till_retry = MAXTIMEOUT;
+
+ syslog(LOG_ERR, _("Failed to setup all outgoing connections, will retry in %d seconds"),
+ seconds_till_retry);
+
+ /* Randomize timeout to avoid global synchronisation effects */
+ randomized_alarm(seconds_till_retry);
}
-
- while(cfg)
+ else
{
- 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 */
+ seconds_till_retry = 5;
}
-
- 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
}
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;
-
+ signal(SIGALRM, try_outgoing_connections);
+ alarm(5);
cp
return 0;
}
*/
void close_network_connections(void)
{
- avl_node_t *node;
+ avl_node_t *node, *next;
connection_t *p;
cp
- for(node = connection_tree->head; node; node = node->next)
+ for(node = connection_tree->head; node; node = next)
{
+ next = node->next;
p = (connection_t *)node->data;
p->status.outgoing = 0;
- p->status.active = 0;
- terminate_connection(p);
+ terminate_connection(p, 0);
}
- if(myself)
- if(myself->status.active)
- {
- close(myself->meta_socket);
- free_connection(myself);
- myself = NULL;
- }
+ terminate_connection(myself, 0);
- close(tap_fd);
+ destroy_trees();
- /* Execute tinc-down script right after shutting down the interface */
execute_script("tinc-down");
- destroy_connection_tree();
+ close(tap_fd);
cp
return;
}
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(p->meta_socket, fs);
}
FD_SET(myself->meta_socket, fs);
return;
}
- cl = lookup_connection(ntohl(from.sin_addr.s_addr), ntohs(from.sin_port));
+ cl = lookup_active(ntohl(from.sin_addr.s_addr), ntohs(from.sin_port));
if(!cl)
{
}
/*
- terminate a connection and notify the other
- end before closing the sockets
+ Terminate a connection:
+ - Close the sockets
+ - Remove associated hosts and subnets
+ - Deactivate the host
+ - Since it might still be referenced, put it on the prune list.
+ - If report == 1, then send DEL_HOST messages to the other tinc daemons.
*/
-void terminate_connection(connection_t *cl)
+void terminate_connection(connection_t *cl, int report)
{
connection_t *p;
subnet_t *subnet;
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;
+ else
+ cl->status.remove = 1;
if(cl->socket)
close(cl->socket);
- if(cl->status.meta)
+ if(cl->meta_socket)
close(cl->meta_socket);
+ connection_del(cl);
+
if(cl->status.meta)
{
+ if(debug_lvl >= DEBUG_CONNECTIONS)
+ syslog(LOG_NOTICE, _("Closing connection with %s (%s)"),
+ cl->name, cl->hostname);
- /* Find all connections that were lost because they were behind cl
- (the connection that was dropped). */
+ if(cl->status.active)
+ {
+ /* 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);
- }
+ for(node = active_tree->head; node; node = next)
+ {
+ next = node->next;
+ p = (connection_t *)node->data;
+ if(p->nexthop == cl)
+ terminate_connection(p, report);
+ }
+ }
+ }
- /* Inform others of termination if it was still active */
+ /* Inform others of termination if needed */
- 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 :) */
- }
- }
+ if(report)
+ for(node = connection_tree->head; node; node = node->next)
+ {
+ p = (connection_t *)node->data;
+ if(p->status.active)
+ send_del_host(p, cl); /* Sounds like recursion, but p does not have a meta connection :) */
+ }
/* Remove the associated subnets */
if(cl->status.outgoing)
{
cl->status.outgoing = 0;
- signal(SIGALRM, sigalrm_handler);
- seconds_till_retry = 5;
+ signal(SIGALRM, try_outgoing_connections);
alarm(seconds_till_retry);
- syslog(LOG_NOTICE, _("Trying to re-establish outgoing connection in 5 seconds"));
+ syslog(LOG_NOTICE, _("Trying to re-establish outgoing connection in %d seconds"), seconds_till_retry);
}
-
- /* Deactivate */
-
- cl->status.active = 0;
cp
+ /* Schedule it for pruning */
+
+ prune_add(cl);
}
/*
for(node = connection_tree->head; node; node = node->next)
{
cl = (connection_t *)node->data;
- if(cl->status.active && cl->status.meta)
+ if(cl->status.active)
{
if(cl->last_ping_time + timeout < now)
{
syslog(LOG_INFO, _("%s (%s) didn't respond to PING"),
cl->name, cl->hostname);
cl->status.timeout = 1;
- terminate_connection(cl);
+ terminate_connection(cl, 1);
}
else
{
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(p->meta_socket, f))
+ if(receive_meta(p) < 0)
+ {
+ terminate_connection(p, p->status.meta);
+ return;
+ }
}
if(FD_ISSET(myself->meta_socket, f))
vpn_packet_t vp;
int lenin;
cp
+#ifdef HAVE_SOLARIS
+ if((lenin = read(tap_fd, vp.data + 14, MTU)) <= 0)
+ {
+ syslog(LOG_ERR, _("Error while reading from tun device: %m"));
+ return;
+ }
+ memcpy(vp.data, mymac.net.mac.address.x, 6);
+ memcpy(vp.data + 6, mymac.net.mac.address.x, 6);
+ vp.data[12] = 0x08;
+ vp.data[13] = 0x00;
+ vp.len = lenin + 14;
+#else
if(taptype == TAP_TYPE_TUNTAP)
{
if((lenin = read(tap_fd, vp.data, MTU)) <= 0)
}
vp.len = lenin - 2;
}
+#endif
total_tap_in += vp.len;
tv.tv_sec = timeout;
tv.tv_usec = 0;
- prune_connection_tree();
+ prune_flush();
build_fdset(&fset);
if((r = select(FD_SETSIZE, &fset, NULL, NULL, &tv)) < 0)
if(debug_lvl >= DEBUG_STATUS)
syslog(LOG_INFO, _("Regenerating symmetric key"));
- RAND_bytes(myself->cipher_pktkey, myself->cipher_pktkeylength);
+ RAND_pseudo_bytes(myself->cipher_pktkey, myself->cipher_pktkeylength);
send_key_changed(myself, NULL);
keyexpires = time(NULL) + keylifetime;
}
projects / tinc / blobdiff