CTLTYPE
int net_ctl_send_ack(struct syncpeer *, enum CTLTYPE, u_int32_t);
int net_ctl_send_error(struct syncpeer *, enum CTLTYPE);
ctype = (enum CTLTYPE)ntohl(ctl->data);
net_ctl_send_ack(struct syncpeer *p, enum CTLTYPE prevtype, u_int32_t code)
net_ctl_send_error(struct syncpeer *p, enum CTLTYPE prevtype)
enum CTLTYPE ctype;