along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: protocol.c,v 1.28.4.18 2000/06/30 12:41:06 guus Exp $
+ $Id: protocol.c,v 1.28.4.24 2000/08/08 17:07:48 guus Exp $
*/
#include "config.h"
#include <utils.h>
#include <xalloc.h>
+#include <netinet/in.h>
+
#include "conf.h"
#include "encr.h"
#include "net.h"
return 0;
}
+/* Evil hack - TCP tunneling is bad */
+int send_tcppacket(conn_list_t *cl, void *data, int len)
+{
+cp
+ if(debug_lvl > 3)
+ syslog(LOG_DEBUG, _("Sending PACKET to %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
+
+ buflen = snprintf(buffer, MAXBUFSIZE, "%d %d\n", PACKET, len);
+
+ if((write(cl->meta_socket, buffer, buflen)) < 0)
+ {
+ syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
+ return -1;
+ }
+
+ if((write(cl->meta_socket, data, len)) < 0)
+ {
+ syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
+ return -1;
+ }
+cp
+ return 0;
+}
+
int send_ping(conn_list_t *cl)
{
cp
is not desirable.
*/
- if(old=lookup_conn(cl->vpn_ip))
+ if((old=lookup_conn(cl->vpn_ip)))
{
if(debug_lvl>0)
syslog(LOG_NOTICE, _("Uplink %s (%s) is already in our connection list"),
old connection that has timed out but we don't know it yet.
*/
- while(old = lookup_conn(cl->vpn_ip))
+ while((old = lookup_conn(cl->vpn_ip)))
{
- syslog(LOG_NOTICE, _("Removing old entry for %s at %s in favour of new connection from %s"),
+ if(debug_lvl > 1)
+ syslog(LOG_NOTICE, _("Removing old entry for %s at %s in favour of new connection from %s"),
cl->vpn_hostname, old->real_hostname, cl->real_hostname);
old->status.active = 0;
terminate_connection(old);
cl->status.active = 1;
- syslog(LOG_NOTICE, _("Connection with %s (%s) activated"),
+ if(debug_lvl > 0)
+ syslog(LOG_NOTICE, _("Connection with %s (%s) activated"),
cl->vpn_hostname, cl->real_hostname);
notify_others(cl, NULL, send_add_host);
return 0;
}
+int tcppacket_h(conn_list_t *cl)
+{
+ int len;
+cp
+ if(!cl->status.active)
+ {
+ syslog(LOG_ERR, _("Got unauthorized PACKET from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
+ return -1;
+ }
+
+ if(sscanf(cl->buffer, "%*d %d", &len) != 1)
+ {
+ syslog(LOG_ERR, _("Got bad PACKET from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
+ return -1;
+ }
+
+ if(len > MTU)
+ {
+ syslog(LOG_ERR, _("Got too big PACKET from %s (%s)"),
+ cl->vpn_hostname, cl->real_hostname);
+ return -1;
+ }
+
+ if(debug_lvl > 3)
+ syslog(LOG_DEBUG, _("Got PACKET length %d from %s (%s)"), len,
+ cl->vpn_hostname, cl->real_hostname);
+
+ cl->tcppacket=len;
+cp
+ return 0;
+}
+
+
int ping_h(conn_list_t *cl)
{
cp
return -1;
}
- if(old = lookup_conn(vpn_ip))
+ if((old = lookup_conn(vpn_ip)))
{
if((real_ip==old->real_ip) && (vpn_mask==old->vpn_mask) && (port==old->port))
{
syslog(LOG_DEBUG, _("Got ADD_HOST for %s (%s) from %s (%s)"),
ncn->vpn_hostname, ncn->real_hostname, cl->vpn_hostname, cl->real_hostname);
-skip_add_host:
-
notify_others(ncn, cl, send_add_host);
+
+skip_add_host:
cp
return 0;
}
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ tcppacket_h, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
req_key_h, ans_key_h, key_changed_h, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0
};