TCP/UDP checksum offload API

[vpp.git] / src / vnet / tcp / tcp_output.c

diff --git a/src/vnet/tcp/tcp_output.c b/src/vnet/tcp/tcp_output.c
index f34eb79..35f3eba 100644 (file)
--- a/src/vnet/tcp/tcp_output.c
+++ b/src/vnet/tcp/tcp_output.c
@@ -1485,7 +1485,12 @@ tcp46_output_inline (vlib_main_t * vm,
              ip4_header_t *ih0;
              ih0 = vlib_buffer_push_ip4 (vm, b0, &tc0->c_lcl_ip4,
                                          &tc0->c_rmt_ip4, IP_PROTOCOL_TCP);
-             th0->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ih0);
+             b0->flags |= VNET_BUFFER_F_IS_IP4 |
+               VNET_BUFFER_F_OFFLOAD_IP_CKSUM |
+               VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
+             vnet_buffer (b0)->l3_hdr_offset = (u8 *) ih0 - b0->data;
+             vnet_buffer (b0)->l4_hdr_offset = (u8 *) th0 - b0->data;
+             th0->checksum = 0;
            }
          else
            {
@@ -1494,8 +1499,13 @@ tcp46_output_inline (vlib_main_t * vm,
 
              ih0 = vlib_buffer_push_ip6 (vm, b0, &tc0->c_lcl_ip6,
                                          &tc0->c_rmt_ip6, IP_PROTOCOL_TCP);
-             th0->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ih0,
-                                                                &bogus);
+
+             b0->flags |= VNET_BUFFER_F_IS_IP6 |
+               VNET_BUFFER_F_OFFLOAD_IP_CKSUM |
+               VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
+             vnet_buffer (b0)->l3_hdr_offset = (u8 *) ih0 - b0->data;
+             vnet_buffer (b0)->l4_hdr_offset = (u8 *) th0 - b0->data;
+             th0->checksum = 0;
              ASSERT (!bogus);
            }