- Added experimental hackish tunneling-over-TCP support.
Just use TCPonly = true in the configuration file.
This commit is contained in:
Guus Sliepen
parent
42455e97a0
commit
fdc6a2f106
6 changed files with 103 additions and 16 deletions
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@ -19,7 +19,7 @@
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: conf.c,v 1.9.4.6 2000/07/02 13:36:18 guus Exp $
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$Id: conf.c,v 1.9.4.7 2000/08/07 14:52:14 guus Exp $
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*/
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@ -71,6 +71,7 @@ static internal_config_t hazahaza[] = {
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{ "VpnMask", vpnmask, TYPE_IP },
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{ "Hostnames", resolve_dns, TYPE_BOOL },
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{ "IndirectData", indirectdata, TYPE_BOOL },
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{ "TCPonly", tcponly, TYPE_BOOL },
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{ NULL, 0, 0 }
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};
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@ -17,7 +17,7 @@
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: conf.h,v 1.6.4.5 2000/06/30 11:45:14 guus Exp $
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$Id: conf.h,v 1.6.4.6 2000/08/07 14:52:14 guus Exp $
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*/
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#ifndef __TINC_CONF_H__
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@ -49,6 +49,7 @@ typedef enum which_t {
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vpnmask,
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resolve_dns,
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indirectdata,
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tcponly,
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} which_t;
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typedef struct config_t {
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17
src/net.c
17
src/net.c
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@ -17,7 +17,7 @@
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: net.c,v 1.35.4.20 2000/07/02 13:40:57 guus Exp $
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$Id: net.c,v 1.35.4.21 2000/08/07 14:52:15 guus Exp $
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*/
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#include "config.h"
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@ -107,16 +107,19 @@ cp
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syslog(LOG_ERR, _("Sending packet of %d bytes to %s (%s)"),
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ntohs(rp.len), cl->vpn_hostname, cl->real_hostname);
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total_socket_out += r;
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cl->want_ping = 1;
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if((cl->flags | myself->flags) & TCPONLY)
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return send_tcppacket(cl, packet, ntohs(rp.len));
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if((r = send(cl->socket, (char*)&rp, ntohs(rp.len), 0)) < 0)
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{
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syslog(LOG_ERR, _("Error sending packet to %s (%s): %m"),
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cl->vpn_hostname, cl->real_hostname);
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return -1;
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}
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total_socket_out += r;
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cl->want_ping = 1;
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cp
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return 0;
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}
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@ -606,6 +609,10 @@ cp
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if(cfg->data.val == stupid_true)
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myself->flags |= EXPORTINDIRECTDATA;
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if(cfg = get_config_val(tcponly))
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if(cfg->data.val == stupid_true)
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myself->flags |= TCPONLY;
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if((myself->meta_socket = setup_listen_meta_socket(myself->port)) < 0)
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{
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syslog(LOG_ERR, _("Unable to set up a listening socket"));
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@ -16,7 +16,7 @@
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: net.h,v 1.9.4.6 2000/07/01 07:49:21 guus Exp $
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$Id: net.h,v 1.9.4.7 2000/08/07 14:52:15 guus Exp $
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*/
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#ifndef __TINC_NET_H__
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@ -50,6 +50,7 @@
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/* flags */
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#define INDIRECTDATA 0x0001 /* Used to indicate that this host has to be reached indirect */
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#define EXPORTINDIRECTDATA 0x0002 /* Used to indicate uplink that it has to tell others to do INDIRECTDATA */
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#define TCPONLY 0x0004 /* Tells sender to send packets over TCP instead of UDP (for firewalls) */
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typedef unsigned long ip_t;
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typedef short length_t;
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@ -17,7 +17,7 @@
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: protocol.c,v 1.28.4.19 2000/06/30 21:03:51 guus Exp $
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$Id: protocol.c,v 1.28.4.20 2000/08/07 14:52:15 guus Exp $
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*/
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#include "config.h"
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@ -120,6 +120,32 @@ cp
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return 0;
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}
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/* Evil hack - TCP tunneling is bad */
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int send_tcppacket(conn_list_t *cl, void *data, int len)
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{
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cp
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if(debug_lvl > 1)
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syslog(LOG_DEBUG, _("Sending PACKET to %s (%s)"),
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cl->vpn_hostname, cl->real_hostname);
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buflen = snprintf(buffer, MAXBUFSIZE, "%d %d\n", PACKET, len);
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if((write(cl->meta_socket, buffer, buflen)) < 0)
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{
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syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
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return -1;
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}
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if((write(cl->meta_socket, data, len)) < 0)
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{
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syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
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return -1;
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}
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cp
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return 0;
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}
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int send_ping(conn_list_t *cl)
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{
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cp
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@ -638,6 +664,50 @@ cp
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return 0;
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}
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int tcppacket_h(conn_list_t *cl)
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{
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char packet[1600];
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int len;
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cp
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if(!cl->status.active)
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{
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syslog(LOG_ERR, _("Got unauthorized PACKET from %s (%s)"),
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cl->vpn_hostname, cl->real_hostname);
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return -1;
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}
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if(sscanf(cl->buffer, "%*d %d", &len) != 1)
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{
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syslog(LOG_ERR, _("Got bad PACKET from %s (%s)"),
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cl->vpn_hostname, cl->real_hostname);
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return -1;
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}
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if(len>1600)
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{
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syslog(LOG_ERR, _("Got too big PACKET from %s (%s)"),
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cl->vpn_hostname, cl->real_hostname);
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return -1;
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}
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if(debug_lvl > 1)
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syslog(LOG_DEBUG, _("Got PACKET from %s (%s)"),
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cl->vpn_hostname, cl->real_hostname);
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/* Evil kludge comming up */
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if(read(cl->meta_socket,packet,len)!=len)
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{
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syslog(LOG_ERR, _("Error while receiving PACKET data from %s (%s)"),
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cl->vpn_hostname, cl->real_hostname);
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return -1;
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}
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xrecv(cl,packet);
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cp
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return 0;
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}
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int ping_h(conn_list_t *cl)
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{
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cp
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@ -963,13 +1033,19 @@ int (*request_handlers[256])(conn_list_t*) = {
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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tcppacket_h, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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req_key_h, ans_key_h, key_changed_h, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0
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};
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@ -16,7 +16,7 @@
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: protocol.h,v 1.5.4.3 2000/06/29 17:09:08 guus Exp $
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$Id: protocol.h,v 1.5.4.4 2000/08/07 14:52:16 guus Exp $
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*/
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#ifndef __TINC_PROTOCOL_H__
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@ -59,6 +59,7 @@ enum {
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CALCULATE = 100, /* calculate the following numer^privkey and send me the result */
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CALC_RES, /* result of the above */
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ALMOST_KEY, /* this number^privkey is the shared key */
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PACKET = 110, /* TCP tunneled network packet */
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REQ_KEY = 160, /* request public key */
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ANS_KEY, /* answer to such request */
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KEY_CHANGED, /* public key has changed */
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