rndis_pktinfo
struct rndis_pktinfo *pi;
pi = (struct rndis_pktinfo *)cp;
sizeof(struct rndis_pktinfo) + NDIS_VLAN_INFO_SIZE + \
sizeof(struct rndis_pktinfo) + NDIS_TXCSUM_INFO_SIZE)
struct rndis_pktinfo *pi;
pi = (struct rndis_pktinfo *)(buf + RNDIS_HEADER_OFFSET +
pi = (struct rndis_pktinfo *)((char *)pi + pi->rm_size);
offsetof(struct rndis_pktinfo, rm_data[dlen])