Method parse

api/src/syscall/net/cmsg.rs:15–43

(hdr: &cmsghdr)

}
impl CMsg {
    pub fn parse(hdr: &cmsghdr) -> AxResult<Self> {
        if hdr.cmsg_len < size_of::<cmsghdr>() {
            return Err(AxError::InvalidInput);
        }

        let data =
            UserConstPtr::<u8>::from((hdr as *const cmsghdr as usize) + size_of::<cmsghdr>())
                .get_as_slice(hdr.cmsg_len - size_of::<cmsghdr>())?;
        Ok(match (hdr.cmsg_level as u32, hdr.cmsg_type as u32) {
            (SOL_SOCKET, SCM_RIGHTS) => {
                if data.len() % size_of::<i32>() != 0 {
                    return Err(AxError::InvalidInput);
                }
                let mut fds = Vec::new();
                for fd in data.chunks_exact(size_of::<i32>()) {
                    let fd = i32::from_ne_bytes(fd.try_into().unwrap());
                    if fd < 0 {
                        return Err(AxError::BadFileDescriptor);
                    }
                    let f = get_file_like(fd)?;
                    fds.push(f);
                }
                Self::Rights { fds }
            }
            _ => {
                return Err(AxError::InvalidInput);
            }
        })
    }
}

pub struct CMsgBuilder<'a> {