Some vhost-backend calculates the wrong checksum in
case of tcp/udp offload when driver resets tcp/udp
checksum field to '0'.
Type: fix
Change-Id: I1d2a9b95b3d5cc1decac38027104a04df2af4680
Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
hdr->csum_start = gho.l4_hdr_offset; // 0x22;
if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
{
hdr->csum_start = gho.l4_hdr_offset; // 0x22;
if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
{
- 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 (tcp_header_t, checksum);
}
else if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
{
- 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);
}
hdr->csum_offset = STRUCT_OFFSET_OF (udp_header_t, checksum);
}
hdr->csum_start = gho.l4_hdr_offset; // 0x36;
if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
{
hdr->csum_start = gho.l4_hdr_offset; // 0x36;
if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
{
- 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 (tcp_header_t, checksum);
}
else if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
{
- 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);
}
}
hdr->csum_offset = STRUCT_OFFSET_OF (udp_header_t, checksum);
}
}
if (b->flags & VNET_BUFFER_F_IS_IP4)
{
ip4_header_t *ip4;
if (b->flags & VNET_BUFFER_F_IS_IP4)
{
ip4_header_t *ip4;
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;
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);
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);
}
else if (b->flags & VNET_BUFFER_F_IS_IP6)
{
}
else if (b->flags & VNET_BUFFER_F_IS_IP6)
{
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;
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);
}
hdr->csum_start = gho.l4_hdr_offset; // 0x36;
hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
}
vnet_buffer
(b0)->l4_hdr_offset);
*l4_hdr_sz = tcp_header_bytes (tcp);
vnet_buffer
(b0)->l4_hdr_offset);
*l4_hdr_sz = tcp_header_bytes (tcp);
}
else if (*l4_proto == IP_PROTOCOL_UDP)
{
}
else if (*l4_proto == IP_PROTOCOL_UDP)
{
vnet_buffer
(b0)->l4_hdr_offset);
*l4_hdr_sz = sizeof (*udp);
vnet_buffer
(b0)->l4_hdr_offset);
*l4_hdr_sz = sizeof (*udp);