X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fdevices%2Fvirtio%2Fdevice.c;h=76f85588ec8e7f55594affb4fe70c7fb7f73161f;hb=85bee7548bc5a360851d92807dae6d4159b68314;hp=856e5f275e3d42f0f1f27da8eaf579016962cd33;hpb=529f0e97b6064039c500adce0d54b738954b2ffa;p=vpp.git

diff --git a/src/vnet/devices/virtio/device.c b/src/vnet/devices/virtio/device.c
index 856e5f275e3..76f85588ec8 100644
--- a/src/vnet/devices/virtio/device.c
+++ b/src/vnet/devices/virtio/device.c
@@ -158,9 +158,21 @@ set_checksum_offsets (vlib_main_t * vm, virtio_if_t * vif, vlib_buffer_t * b,
       hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
       hdr->csum_start = gho.l4_hdr_offset;	// 0x22;
       if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
-	hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
+	{
+	  tcp_header_t *tcp =
+	    (tcp_header_t *) (vlib_buffer_get_current (b) +
+			      gho.l4_hdr_offset);
+	  tcp->checksum = 0;
+	  hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
+	}
       else if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
-	hdr->csum_offset = STRUCT_OFFSET_OF (udp_header_t, checksum);
+	{
+	  udp_header_t *udp =
+	    (udp_header_t *) (vlib_buffer_get_current (b) +
+			      gho.l4_hdr_offset);
+	  udp->checksum = 0;
+	  hdr->csum_offset = STRUCT_OFFSET_OF (udp_header_t, checksum);
+	}
 
       /*
        * virtio devices do not support IP4 checksum offload. So driver takes care
@@ -177,9 +189,21 @@ set_checksum_offsets (vlib_main_t * vm, virtio_if_t * vif, vlib_buffer_t * b,
       hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
       hdr->csum_start = gho.l4_hdr_offset;	// 0x36;
       if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
-	hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
+	{
+	  tcp_header_t *tcp =
+	    (tcp_header_t *) (vlib_buffer_get_current (b) +
+			      gho.l4_hdr_offset);
+	  tcp->checksum = 0;
+	  hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
+	}
       else if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
-	hdr->csum_offset = STRUCT_OFFSET_OF (udp_header_t, checksum);
+	{
+	  udp_header_t *udp =
+	    (udp_header_t *) (vlib_buffer_get_current (b) +
+			      gho.l4_hdr_offset);
+	  udp->checksum = 0;
+	  hdr->csum_offset = STRUCT_OFFSET_OF (udp_header_t, checksum);
+	}
     }
 }
 
@@ -202,10 +226,15 @@ add_buffer_to_slot (vlib_main_t * vm, virtio_if_t * vif,
       if (b->flags & VNET_BUFFER_F_IS_IP4)
 	{
 	  ip4_header_t *ip4;
+	  tcp_header_t *tcp;
 	  gso_header_offset_t gho = vnet_gso_header_offset_parser (b, 0);
 	  hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
 	  hdr->gso_size = vnet_buffer2 (b)->gso_size;
 	  hdr->hdr_len = gho.l4_hdr_offset + gho.l4_hdr_sz;
+	  tcp =
+	    (tcp_header_t *) (vlib_buffer_get_current (b) +
+			      gho.l4_hdr_offset);
+	  tcp->checksum = 0;
 	  hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
 	  hdr->csum_start = gho.l4_hdr_offset;	// 0x22;
 	  hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
@@ -221,11 +250,16 @@ add_buffer_to_slot (vlib_main_t * vm, virtio_if_t * vif,
 	}
       else if (b->flags & VNET_BUFFER_F_IS_IP6)
 	{
+	  tcp_header_t *tcp;
 	  gso_header_offset_t gho = vnet_gso_header_offset_parser (b, 1);
 	  hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
 	  hdr->gso_size = vnet_buffer2 (b)->gso_size;
 	  hdr->hdr_len = gho.l4_hdr_offset + gho.l4_hdr_sz;
 	  hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
+	  tcp =
+	    (tcp_header_t *) (vlib_buffer_get_current (b) +
+			      gho.l4_hdr_offset);
+	  tcp->checksum = 0;
 	  hdr->csum_start = gho.l4_hdr_offset;	// 0x36;
 	  hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
 	}