CEPH_PREAMBLE_LEN
#define CEPH_PREAMBLE_PLAIN_LEN CEPH_PREAMBLE_LEN
#define CEPH_PREAMBLE_SECURE_LEN (CEPH_PREAMBLE_LEN + \
int base_len = CEPH_PREAMBLE_LEN + ctrl_len + CEPH_CRC_LEN;
memcpy(buf, con->v2.in_buf, CEPH_PREAMBLE_LEN);
void *crcp = p + CEPH_PREAMBLE_LEN - CEPH_CRC_LEN;
memset(p, 0, CEPH_PREAMBLE_LEN);
void *crcp = p + CEPH_PREAMBLE_LEN - CEPH_CRC_LEN;
#define CTRL_BODY(p) ((void *)(p) + CEPH_PREAMBLE_LEN)