X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fprotocol.c;h=a3fa5f1a402d0e2800059f202ad21193dcec58b2;hp=a6f302906cb90118addb95433d9506eb024a320b;hb=fdc6a2f106315cd9ed22943d8c0bd279631e66b4;hpb=0f9ad1f047efec53590dc43f07d225e5f20456cb

diff --git a/src/protocol.c b/src/protocol.c
index a6f30290..a3fa5f1a 100644
--- a/src/protocol.c
+++ b/src/protocol.c
@@ -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 1.28.4.17 2000/06/29 19:47:03 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
@@ -507,7 +533,8 @@ cp
 
       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);
@@ -535,7 +562,8 @@ cp
   
   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);
@@ -613,6 +641,15 @@ cp
       return 0;
     }
 
+  /* Connections lists are really messed up if this happens */
+  if(vpn_ip == myself->vpn_ip)
+    {
+      syslog(LOG_ERR, _("Warning: got DEL_HOST from %s (%s) for ourself, restarting"),
+               cl->vpn_hostname, cl->real_hostname);
+      sighup = 1;
+      return 0;
+    }
+
   if(debug_lvl > 1)
     syslog(LOG_DEBUG, _("Got DEL_HOST for %s (%s) from %s (%s)"),
            fw->vpn_hostname, fw->real_hostname, cl->vpn_hostname, cl->real_hostname);
@@ -627,6 +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
@@ -709,6 +790,15 @@ cp
           terminate_connection(old);
         }
     }
+  
+  /* Connections lists are really messed up if this happens */
+  if(vpn_ip == myself->vpn_ip)
+    {
+      syslog(LOG_ERR, _("Warning: got ADD_HOST from %s (%s) for ourself, restarting"),
+               cl->vpn_hostname, cl->real_hostname);
+      sighup = 1;
+      return 0;
+    }
     
   ncn = new_conn_list();
   ncn->real_ip = real_ip;
@@ -943,13 +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
 };