ipsec: VPP-1316 calculate IP/TCP/UDP inner checksums

[vpp.git] / src / vnet / ipsec / ipsec_output.c

diff --git a/src/vnet/ipsec/ipsec_output.c b/src/vnet/ipsec/ipsec_output.c
index 4bfbf60..a62c0a5 100644 (file)
--- a/src/vnet/ipsec/ipsec_output.c
+++ b/src/vnet/ipsec/ipsec_output.c
@@ -190,6 +190,7 @@ ipsec_output_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
   vlib_frame_t *f = 0;
   u32 spd_index0 = ~0;
   ipsec_spd_t *spd0 = 0;
+  int bogus;
   u64 nc_protect = 0, nc_bypass = 0, nc_discard = 0, nc_nomatch = 0;
 
   from = vlib_frame_vector_args (from_frame);
@@ -204,6 +205,7 @@ ipsec_output_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
       ip6_header_t *ip6_0 = 0;
       udp_header_t *udp0;
       u32 iph_offset = 0;
+      tcp_header_t *tcp0;
 
       bi0 = from[0];
       b0 = vlib_get_buffer (vm, bi0);
@@ -269,6 +271,7 @@ ipsec_output_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
                                          clib_net_to_host_u16
                                          (udp0->dst_port));
        }
+      tcp0 = (void *) udp0;
 
       if (PREDICT_TRUE (p0 != NULL))
        {
@@ -282,18 +285,53 @@ ipsec_output_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
              else
                next_node_index = im->ah_encrypt_node_index;
              vnet_buffer (b0)->ipsec.sad_index = p0->sa_index;
-             vlib_buffer_advance (b0, iph_offset);
              p0->counter.packets++;
              if (is_ipv6)
                {
                  p0->counter.bytes +=
                    clib_net_to_host_u16 (ip6_0->payload_length);
                  p0->counter.bytes += sizeof (ip6_header_t);
+                 if (PREDICT_FALSE
+                     (b0->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM))
+                   {
+                     tcp0->checksum =
+                       ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip6_0,
+                                                          &bogus);
+                     b0->flags &= ~VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
+                   }
+                 if (PREDICT_FALSE
+                     (b0->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
+                   {
+                     udp0->checksum =
+                       ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip6_0,
+                                                          &bogus);
+                     b0->flags &= ~VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
+                   }
                }
              else
                {
                  p0->counter.bytes += clib_net_to_host_u16 (ip0->length);
+                 if (b0->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM)
+                   {
+                     ip0->checksum = ip4_header_checksum (ip0);
+                     b0->flags &= ~VNET_BUFFER_F_OFFLOAD_IP_CKSUM;
+                   }
+                 if (PREDICT_FALSE
+                     (b0->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM))
+                   {
+                     tcp0->checksum =
+                       ip4_tcp_udp_compute_checksum (vm, b0, ip0);
+                     b0->flags &= ~VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
+                   }
+                 if (PREDICT_FALSE
+                     (b0->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
+                   {
+                     udp0->checksum =
+                       ip4_tcp_udp_compute_checksum (vm, b0, ip0);
+                     b0->flags &= ~VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
+                   }
                }
+             vlib_buffer_advance (b0, iph_offset);
            }
          else if (p0->policy == IPSEC_POLICY_ACTION_BYPASS)
            {