SYN_ID_MAJOR
SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
if (SYN_ID_MAJOR(info->identity) < 4)
#define SYN_ID_FULL(i) ((SYN_ID_MAJOR(i) << 8) | SYN_ID_MINOR(i))
#define SYN_ID_DISGEST_SUPPORTED(i) (SYN_ID_MAJOR(i) >= 4)