ip6: during icmp to icmp6 translation truncate error messages

[vpp.git] / src / vnet / ip / ip4_to_ip6.h

diff --git a/src/vnet/ip/ip4_to_ip6.h b/src/vnet/ip/ip4_to_ip6.h
index 21538a9..e78985b 100644 (file)
--- a/src/vnet/ip/ip4_to_ip6.h
+++ b/src/vnet/ip/ip4_to_ip6.h
@@ -414,8 +414,8 @@ icmp_to_icmp6 (vlib_buffer_t * p, ip4_to_ip6_set_fn_t fn, void *ctx,
   if ((rv = fn (p, ip4, ip6, ctx)) != 0)
     return rv;
 
-  //Truncate when the packet exceeds the minimal IPv6 MTU
-  if (p->current_length > 1280)
+  //Truncate when ICMPv6 error message exceeds the minimal IPv6 MTU
+  if (p->current_length > 1280 && icmp->type < 128)
     {
       ip6->payload_length = clib_host_to_net_u16 (1280 - sizeof (*ip6));
       p->current_length = 1280;        //Looks too simple to be correct...