X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Finterface_output.h;h=f1fa4d85b5eef26e4f4c3b27a8742b13443f2831;hb=0b6a857d85df97e887de7aaf00fd6bd2dae39bf8;hp=58f7f6179579e63ef9cd8ce43c570d745ec3dcb4;hpb=3ea17d54a9a00c81bc672a7be1d48b765ac87ed2;p=vpp.git

diff --git a/src/vnet/interface_output.h b/src/vnet/interface_output.h
index 58f7f617957..f1fa4d85b5e 100644
--- a/src/vnet/interface_output.h
+++ b/src/vnet/interface_output.h
@@ -62,7 +62,6 @@ calc_checksums (vlib_main_t * vm, vlib_buffer_t * b)
 
   if (is_ip4)
     {
-      ip4 = (ip4_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset);
       if (b->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM)
 	ip4->checksum = ip4_header_checksum (ip4);
       if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
@@ -71,7 +70,10 @@ calc_checksums (vlib_main_t * vm, vlib_buffer_t * b)
 	  th->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
 	}
       if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
-	uh->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
+	{
+	  uh->checksum = 0;
+	  uh->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
+	}
     }
   if (is_ip6)
     {