diff options
| author |   Mohsin Kazmi <sykazmi@cisco.com> | 2020-03-25 20:37:16 +0000 |
|---|---|---|
| committer |   Andrew Yourtchenko <ayourtch@gmail.com> | 2020-03-30 11:39:22 +0000 |
| commit | 0937fdfa86ce61c54f37d142aabae45463a959e5 (patch) | |
| tree | 2aacbc36145319c9fac0ffe7dafd8d74b7e43b2b /src/vnet/devices/virtio/device.c | |
| parent | 7654a718669f0dc950344c049186b9452bf48ca9 (diff) | |
gso: fix the header parser to read only
Previously, header parser sets the tcp/udp checksum to 0.
It should be read only function for vlib_buffer_t.
Type: fix
Change-Id: I9c3398372f22998da3df188f0b7db13748303068
Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
Diffstat (limited to 'src/vnet/devices/virtio/device.c')
| -rw-r--r-- | src/vnet/devices/virtio/device.c | 42 |
1 files changed, 38 insertions, 4 deletions
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); } |