MAC_HWCKSUM_EMUL
emul |= MAC_HWCKSUM_EMUL;
emul_flags |= MAC_HWCKSUM_EMUL;
const boolean_t do_ulp_cksum = (emul & MAC_HWCKSUM_EMUL) != 0 &&
emul |= MAC_HWCKSUM_EMUL;
#define MAC_HWCKSUM_EMULS (MAC_HWCKSUM_EMUL | MAC_IPCKSUM_EMUL)
#define MAC_ALL_EMULS (MAC_HWCKSUM_EMUL | MAC_IPCKSUM_EMUL | \
mac_hw_emul(&mp, NULL, NULL, MAC_HWCKSUM_EMUL);