- Override destination ethernet address on incoming packets with

[tinc] / src / net.c

diff --git a/src/net.c b/src/net.c
index 85255a4..3da023c 100644 (file)
--- a/src/net.c
+++ b/src/net.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: net.c,v 1.35.4.47 2000/10/28 21:05:17 guus Exp $
+    $Id: net.c,v 1.35.4.49 2000/10/28 21:52:22 guus Exp $
 */
 
 #include "config.h"
@@ -52,11 +52,13 @@
 #include "netutl.h"
 #include "protocol.h"
 #include "meta.h"
+#include "connlist.h"
+#include "subnet.h"
 
 #include "system.h"
 
 int tap_fd = -1;
-int taptype = 0;
+int taptype = TAP_TYPE_ETHERTAP;
 int total_tap_in = 0;
 int total_tap_out = 0;
 int total_socket_in = 0;
@@ -67,6 +69,8 @@ static int seconds_till_retry;
 
 char *unknown = NULL;
 
+subnet_t mymac;
+
 /*
   strip off the MAC adresses of an ethernet frame
 */
@@ -145,14 +149,24 @@ cp
   outlen = outpkt.len+2;
   memcpy(&outpkt, inpkt, outlen);
      
-  /* FIXME sometime
-  add_mac_addresses(&outpkt);
-  */
-  
-  if(write(tap_fd, outpkt.data, outpkt.len) < 0)
-    syslog(LOG_ERR, _("Can't write to tap device: %m"));
-  else
-    total_tap_out += outpkt.len;
+  /* Fix mac address */
+
+  memcpy(outpkt.data, mymac.net.mac.address.x, 6);
+
+  if(taptype == TAP_TYPE_TUNTAP)
+    {
+      if(write(tap_fd, outpkt.data, outpkt.len) < 0)
+        syslog(LOG_ERR, _("Can't write to tun/tap device: %m"));
+      else
+        total_tap_out += outpkt.len;
+    }
+  else /* ethertap */
+    {
+      if(write(tap_fd, outpkt.data - 2, outpkt.len + 2) < 0)
+        syslog(LOG_ERR, _("Can't write to ethertap device: %m"));
+      else
+        total_tap_out += outpkt.len + 2;
+    }
 cp
   return 0;
 }
@@ -371,7 +385,16 @@ cp
 cp
   tap_fd = nfd;
 
-  taptype = 0;
+  /* Set default MAC address for ethertap devices */
+  
+  taptype = TAP_TYPE_ETHERTAP;
+  mymac.type = SUBNET_MAC;
+  mymac.net.mac.address.x[0] = 0xfe;
+  mymac.net.mac.address.x[1] = 0xfd;
+  mymac.net.mac.address.x[2] = 0x00;
+  mymac.net.mac.address.x[3] = 0x00;
+  mymac.net.mac.address.x[4] = 0x00;
+  mymac.net.mac.address.x[5] = 0x00;
 
 #ifdef HAVE_TUNTAP
   /* Ok now check if this is an old ethertap or a new tun/tap thingie */
@@ -384,12 +407,7 @@ cp
   if (!ioctl(tap_fd, TUNSETIFF, (void *) &ifr))
   { 
     syslog(LOG_INFO, _("%s is a new style tun/tap device"), tapfname);
-    taptype = 1;
-
-    if((cfg = get_config_val(config, tapsubnet)) == NULL)
-      syslog(LOG_INFO, _("tun/tap device will be left unconfigured"));
-    else
-      /* Setup inetaddr/netmask etc */;
+    taptype = TAP_TYPE_TUNTAP;
   }
 #endif
 
@@ -1225,7 +1243,7 @@ void handle_tap_input(void)
   ipv4_t dest;
   int lenin;
 cp  
-  if(taptype = 1)
+  if(taptype == TAP_TYPE_TUNTAP)
     {
       if((lenin = read(tap_fd, vp.data, MTU)) <= 0)
         {
@@ -1234,14 +1252,14 @@ cp
         }
       vp.len = lenin;
     }
-  else
+  else                 /* ethertap */
     {
-      if((lenin = read(tap_fd, &vp.len, MTU)) <= 0)
+      if((lenin = read(tap_fd, vp.data - 2, MTU)) <= 0)
         {
           syslog(LOG_ERR, _("Error while reading from ethertap device: %m"));
           return;
         }
-//      vp.len = lenin - 2;
+      vp.len = lenin - 2;
     }
 
   total_tap_in += lenin;