+static_always_inline void
+tso_segment_vxlan_tunnel_headers_fixup (vlib_main_t * vm, vlib_buffer_t * b,
+ generic_header_offset_t * gho)
+{
+ u8 proto = 0;
+ ip4_header_t *ip4 = 0;
+ ip6_header_t *ip6 = 0;
+ udp_header_t *udp = 0;
+
+ ip4 =
+ (ip4_header_t *) (vlib_buffer_get_current (b) + gho->outer_l3_hdr_offset);
+ ip6 =
+ (ip6_header_t *) (vlib_buffer_get_current (b) + gho->outer_l3_hdr_offset);
+ udp =
+ (udp_header_t *) (vlib_buffer_get_current (b) + gho->outer_l4_hdr_offset);
+
+ if (gho->gho_flags & GHO_F_OUTER_IP4)
+ {
+ proto = ip4->protocol;
+ ip4->length =
+ clib_host_to_net_u16 (b->current_length - gho->outer_l3_hdr_offset);
+ ip4->checksum = ip4_header_checksum (ip4);
+ }
+ else if (gho->gho_flags & GHO_F_OUTER_IP6)
+ {
+ proto = ip6->protocol;
+ ip6->payload_length =
+ clib_host_to_net_u16 (b->current_length - gho->outer_l4_hdr_offset);
+ }
+ if (proto == IP_PROTOCOL_UDP)
+ {
+ int bogus;
+ udp->length =
+ clib_host_to_net_u16 (b->current_length - gho->outer_l4_hdr_offset);
+ udp->checksum = 0;
+ if (gho->gho_flags & GHO_F_OUTER_IP6)
+ {
+ udp->checksum =
+ ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
+ }
+ else if (gho->gho_flags & GHO_F_OUTER_IP4)
+ {
+ udp->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
+ }
+ b->flags &= ~VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
+ }
+}
+
+static_always_inline u16
+tso_segment_vxlan_tunnel_fixup (vlib_main_t * vm,
+ vnet_interface_per_thread_data_t * ptd,
+ vlib_buffer_t * sb0,
+ generic_header_offset_t * gho)
+{
+ u16 n_tx_bufs = vec_len (ptd->split_buffers);
+ u16 i = 0, n_tx_bytes = 0;
+
+ while (i < n_tx_bufs)
+ {
+ vlib_buffer_t *b0 = vlib_get_buffer (vm, ptd->split_buffers[i]);
+ vnet_get_outer_header (b0, gho);
+ clib_memcpy_fast (vlib_buffer_get_current (b0),
+ vlib_buffer_get_current (sb0), gho->outer_hdr_sz);
+
+ tso_segment_vxlan_tunnel_headers_fixup (vm, b0, gho);
+ n_tx_bytes += gho->outer_hdr_sz;
+ i++;
+ }
+ return n_tx_bytes;
+}
+