Restore punt/inject after FIB2.0

The tuntap punt/inject should be enabled for IPv4/6 RX once any vpp
interface has an IP address.

Change-Id: I4a507b7540b7464ed6d21035ac9b8f9463028c6f
Signed-off-by: Igor Mikhailov (imichail) <imichail@cisco.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/vnet/vnet/unix/tuntap.c b/vnet/vnet/unix/tuntap.c
index 43ff06aa9ff..4eab3913780 100644
--- a/vnet/vnet/unix/tuntap.c
+++ b/vnet/vnet/unix/tuntap.c
@@ -753,6 +753,12 @@ tuntap_ip4_add_del_interface_address (ip4_main_t * im,
   snprintf (ifr.ifr_name, sizeof(ifr.ifr_name), 
             "%s:%d", tm->tun_name, (int)(ap - tm->subifs));
 
+  /* the tuntap punt/inject is enabled for IPv4 RX so long as
+   * any vpp interface has an IPv4 address.
+   * this is also ref counted.
+   */
+  ip4_sw_interface_enable_disable (tm->sw_if_index, !is_delete);
+
   if (! is_delete)
     {
       struct sockaddr_in * sin;
@@ -856,6 +862,12 @@ tuntap_ip6_add_del_interface_address (ip6_main_t * im,
   snprintf (ifr.ifr_name, sizeof(ifr.ifr_name), 
             "%s:%d", tm->tun_name, (int)(ap - tm->subifs));
 
+  /* the tuntap punt/inject is enabled for IPv6 RX so long as
+   * any vpp interface has an IPv6 address.
+   * this is also ref counted.
+   */
+  ip6_sw_interface_enable_disable (tm->sw_if_index, !is_delete);
+
   if (! is_delete)
     {
       int sockfd = socket (AF_INET6, SOCK_STREAM, 0);