NET_BUFFER_L3_CHECKSUM_VALID
buffer->buffer_flags |= NET_BUFFER_L3_CHECKSUM_VALID;
buffer->buffer_flags |= NET_BUFFER_L3_CHECKSUM_VALID;
if ((buffer->buffer_flags & NET_BUFFER_L3_CHECKSUM_VALID) == 0) {
buffer->buffer_flags |= NET_BUFFER_L3_CHECKSUM_VALID;