sifrpc_callno_t
sifrpc_call(struct sifrpc_client *_cookie, sifrpc_callno_t call_no,
sifrpc_callno_t call_no; /* passed to service function arg. */
void *(*service_func)(sifrpc_callno_t, void *, size_t), void *service_arg,
void *(*cancel_func)(sifrpc_callno_t, void *, size_t), void *cancel_arg)
typedef void *(*sifrpc_rpcfunc_t)(sifrpc_callno_t, void *, size_t);
sifrpc_callno_t callno;
int sifrpc_call(struct sifrpc_client *, sifrpc_callno_t, u_int32_t,