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- Added experimental hackish tunneling-over-TCP support.

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Just use TCPonly = true in the configuration file.
This commit is contained in:
Guus Sliepen 2000-08-07 14:52:16 +00:00
parent 42455e97a0
commit fdc6a2f106
6 changed files with 103 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

90
src/protocol.c
View file

@ -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: protocol.c,v 1.28.4.19 2000/06/30 21:03:51 guus Exp $
$Id: protocol.c,v 1.28.4.20 2000/08/07 14:52:15 guus Exp $
*/
#include "config.h"
@ -120,6 +120,32 @@ cp
return 0;
}
/* Evil hack - TCP tunneling is bad */
int send_tcppacket(conn_list_t *cl, void *data, int len)
{
cp
if(debug_lvl > 1)
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
@ -638,6 +664,50 @@ cp
return 0;
}
int tcppacket_h(conn_list_t *cl)
{
char packet[1600];
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>1600)
{
syslog(LOG_ERR, _("Got too big PACKET from %s (%s)"),
cl->vpn_hostname, cl->real_hostname);
return -1;
}
if(debug_lvl > 1)
syslog(LOG_DEBUG, _("Got PACKET from %s (%s)"),
cl->vpn_hostname, cl->real_hostname);
/* Evil kludge comming up */
if(read(cl->meta_socket,packet,len)!=len)
{
syslog(LOG_ERR, _("Error while receiving PACKET data from %s (%s)"),
cl->vpn_hostname, cl->real_hostname);
return -1;
}
xrecv(cl,packet);
cp
return 0;
}
int ping_h(conn_list_t *cl)
{
cp
@ -963,13 +1033,19 @@ int (*request_handlers[256])(conn_list_t*) = {
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
};