+static_always_inline u16
+dpdk_lro_find_l4_hdr_sz (vlib_buffer_t *b)
+{
+ u16 l4_hdr_sz = 0;
+ u16 current_offset = 0;
+ ethernet_header_t *e;
+ tcp_header_t *tcp;
+ u8 *data = vlib_buffer_get_current (b);
+ u16 ethertype;
+ e = (void *) data;
+ current_offset += sizeof (e[0]);
+ ethertype = clib_net_to_host_u16 (e->type);
+ if (ethernet_frame_is_tagged (ethertype))
+ {
+ ethernet_vlan_header_t *vlan = (ethernet_vlan_header_t *) (e + 1);
+ ethertype = clib_net_to_host_u16 (vlan->type);
+ current_offset += sizeof (*vlan);
+ if (ethertype == ETHERNET_TYPE_VLAN)
+ {
+ vlan++;
+ current_offset += sizeof (*vlan);
+ ethertype = clib_net_to_host_u16 (vlan->type);
+ }
+ }
+ data += current_offset;
+ if (ethertype == ETHERNET_TYPE_IP4)
+ {
+ data += sizeof (ip4_header_t);
+ tcp = (void *) data;
+ l4_hdr_sz = tcp_header_bytes (tcp);
+ }
+ else
+ {
+ /* FIXME: extension headers...*/
+ data += sizeof (ip6_header_t);
+ tcp = (void *) data;
+ l4_hdr_sz = tcp_header_bytes (tcp);
+ }
+ return l4_hdr_sz;
+}
+
+static_always_inline void
+dpdk_process_lro_offload (dpdk_device_t *xd, dpdk_per_thread_data_t *ptd,
+ uword n_rx_packets)
+{
+ uword n;
+ vlib_buffer_t *b0;
+ for (n = 0; n < n_rx_packets; n++)
+ {
+ b0 = vlib_buffer_from_rte_mbuf (ptd->mbufs[n]);
+ if (ptd->flags[n] & PKT_RX_LRO)
+ {
+ b0->flags |= VNET_BUFFER_F_GSO;
+ vnet_buffer2 (b0)->gso_size = ptd->mbufs[n]->tso_segsz;
+ vnet_buffer2 (b0)->gso_l4_hdr_sz = dpdk_lro_find_l4_hdr_sz (b0);
+ }
+ }
+}
+