Hi Bobby, > /* The feature bitmap for virtio vsock */ > #define VIRTIO_VSOCK_F_SEQPACKET 1 /* SOCK_SEQPACKET supported */ > +#define VIRTIO_VSOCK_F_DGRAM 2 /* Host support dgram vsock */ Seems that bit 2 is already taken by VIRTIO_VSOCK_F_NO_IMPLIED_STREAM. https://github.com/oasis-tcs/virtio-spec/commit/26ed30ccb049fd51d6e20aad3de2807d678edb3a