Function sctp_sendv 

pub unsafe extern "C" fn sctp_sendv(
    sd: c_int,
    iov: *const iovec,
    iovcnt: c_int,
    addrs: *mut sockaddr,
    addrcnt: c_int,
    info: *mut c_void,
    infolen: socklen_t,
    infotype: c_uint,
    flags: c_int,
) -> ssize_t