unsafe extern "C" fn coap_get_block(
pkt: *mut coap_pkt_t,
block: *mut coap_block1_t,
option: uint16_t,
) -> c_int
unsafe extern "C" fn coap_get_block(
pkt: *mut coap_pkt_t,
block: *mut coap_block1_t,
option: uint16_t,
) -> c_int