gso: fix the udp checksum in test

[vpp.git] / src / vnet / pg / input.c

diff --git a/src/vnet/pg/input.c b/src/vnet/pg/input.c
index 483add0..6968cce 100644 (file)
--- a/src/vnet/pg/input.c
+++ b/src/vnet/pg/input.c
@@ -1537,7 +1537,6 @@ fill_buffer_offload_flags (vlib_main_t * vm, u32 * buffers, u32 n_buffers,
     {
       vlib_buffer_t *b0 = vlib_get_buffer (vm, buffers[i]);
       u8 l4_proto = 0;
-      u8 l4_hdr_sz = 0;
 
       ethernet_header_t *eh =
        (ethernet_header_t *) vlib_buffer_get_current (b0);
@@ -1589,25 +1588,21 @@ fill_buffer_offload_flags (vlib_main_t * vm, u32 * buffers, u32 n_buffers,
       if (l4_proto == IP_PROTOCOL_TCP)
        {
          b0->flags |= VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
-         tcp_header_t *tcp = (tcp_header_t *) (vlib_buffer_get_current (b0) +
-                                               vnet_buffer
-                                               (b0)->l4_hdr_offset);
-         tcp->checksum = 0;
-         if (gso_enabled)
+
+         /* only set GSO flag for chained buffers */
+         if (gso_enabled && (b0->flags & VLIB_BUFFER_NEXT_PRESENT))
            {
              b0->flags |= VNET_BUFFER_F_GSO;
-             l4_hdr_sz = tcp_header_bytes (tcp);
-             vnet_buffer2 (b0)->gso_l4_hdr_sz = l4_hdr_sz;
+             tcp_header_t *tcp =
+               (tcp_header_t *) (vlib_buffer_get_current (b0) +
+                                 vnet_buffer (b0)->l4_hdr_offset);
+             vnet_buffer2 (b0)->gso_l4_hdr_sz = tcp_header_bytes (tcp);
              vnet_buffer2 (b0)->gso_size = gso_size;
            }
        }
       else if (l4_proto == IP_PROTOCOL_UDP)
        {
          b0->flags |= VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
-         udp_header_t *udp = (udp_header_t *) (vlib_buffer_get_current (b0) +
-                                               vnet_buffer
-                                               (b0)->l4_hdr_offset);
-         udp->checksum = 0;
        }
     }
 }