MPPE_H_BIT
#define MPPE_ALL_BITS (MPPE_D_BIT|MPPE_L_BIT|MPPE_S_BIT|MPPE_M_BIT|MPPE_H_BIT)
*ptr++ = MPPE_H_BIT; \
if (!(ptr[0] & MPPE_H_BIT)) \
if (ptr[0] & ~MPPE_H_BIT) \