Method push

src/net/send_recv/msg.rs:299–321

Add an ancillary message to the buffer. Returns `true` if the message was added successfully.

(&mut self, msg: SendAncillaryMessage<'slice, 'fd>)

    ///
    /// Returns `true` if the message was added successfully.
    pub fn push(&mut self, msg: SendAncillaryMessage<'slice, 'fd>) -> bool {
        match msg {
            SendAncillaryMessage::ScmRights(fds) => {
                let fds_bytes =
                    unsafe { slice::from_raw_parts(fds.as_ptr().cast::<u8>(), size_of_val(fds)) };
                self.push_ancillary(fds_bytes, c::SOL_SOCKET as _, c::SCM_RIGHTS as _)
            }
            #[cfg(linux_kernel)]
            SendAncillaryMessage::ScmCredentials(ucred) => {
                let ucred_bytes = unsafe {
                    slice::from_raw_parts(addr_of!(ucred).cast::<u8>(), size_of_val(&ucred))
                };
                self.push_ancillary(ucred_bytes, c::SOL_SOCKET as _, c::SCM_CREDENTIALS as _)
            }
            #[cfg(target_os = "linux")]
            SendAncillaryMessage::TxTime(tx_time) => {
                let tx_time_bytes = unsafe {
                    slice::from_raw_parts(addr_of!(tx_time).cast::<u8>(), size_of_val(&tx_time))
                };
                self.push_ancillary(tx_time_bytes, c::SOL_SOCKET as _, c::SO_TXTIME as _)
            }
        }
    }

    /// Pushes an ancillary message to the buffer.
    fn push_ancillary(&mut self, source: &[u8], cmsg_level: c::c_int, cmsg_type: c::c_int) -> bool {