To add a record to the dhcptab container.
int add_dt(void *handp, dt_rec_t *newp);
Adds the record newp to the dhcptab container referred to by handp. The signature associated with newp is updated by the underlying public module. If an update collision occurs, the data store is not updated. The caller is responsible for freeing any dynamically allocated arguments.
DSVC_SUCCESS, DSVC_ACCESS, DSVC_BUSY, DSVC_INTERNAL, DSVC_EXISTS.