ECRYPTFS_MAX_PKT_LEN_SIZE
#define ECRYPTFS_TAG_70_MAX_METADATA_SIZE (1 + ECRYPTFS_MAX_PKT_LEN_SIZE \
+ ECRYPTFS_MAX_PKT_LEN_SIZE \
char packet_length[ECRYPTFS_MAX_PKT_LEN_SIZE];
unsigned char packet_size_peek[ECRYPTFS_MAX_PKT_LEN_SIZE];