83 lines
3.4 KiB
Rust
83 lines
3.4 KiB
Rust
use byteorder::{BigEndian, ByteOrder};
|
|
use crate::udp::UdpSocket;
|
|
use crate::network::Network;
|
|
use crate::bus::ActiveBus;
|
|
use crate::socket::Socket;
|
|
use crate::IpAddress;
|
|
use crate::register::socketn;
|
|
|
|
pub struct UdpPacket<UdpSocket> {
|
|
udp_socket: UdpSocket,
|
|
address: IpAddress,
|
|
remote_port: u16,
|
|
read_pointer: u16,
|
|
write_pointer: u16,
|
|
}
|
|
|
|
impl<'a, SpiBus: ActiveBus, NetworkImpl: Network, SocketImpl: Socket> UdpPacket<UdpSocket<'a, SpiBus, NetworkImpl, SocketImpl>>
|
|
{
|
|
pub fn new(mut udp_socket: UdpSocket<'a, SpiBus, NetworkImpl, SocketImpl>) -> Result<Self, SpiBus::Error> {
|
|
let receive_size = Self::block_until_receive_size_known(&mut udp_socket)?;
|
|
// |<-- read_pointer read_pointer + received_size -->|
|
|
// |Destination IP Address | Destination Port | Byte Size of DATA | Actual DATA ... |
|
|
// | --- 4 Bytes --- | --- 2 Bytes --- | --- 2 Bytes --- | .... |
|
|
let read_pointer = udp_socket.socket.get_rx_read_pointer(&mut udp_socket.bus)?;
|
|
let mut header = [0u8; 8];
|
|
block!(udp_socket.bus.transfer_frame(udp_socket.socket.rx_buffer(), read_pointer, false, &mut header))?;
|
|
Ok(UdpPacket {
|
|
udp_socket,
|
|
address: IpAddress::new(header[0], header[1], header[2], header[3]),
|
|
remote_port: BigEndian::read_u16(&header[4..5]),
|
|
read_pointer: read_pointer + 8,
|
|
write_pointer: read_pointer + receive_size,
|
|
})
|
|
}
|
|
|
|
pub fn get_remote_port(&self) -> u16 {
|
|
self.remote_port
|
|
}
|
|
|
|
pub fn get_address(&self) -> IpAddress {
|
|
self.address
|
|
}
|
|
|
|
pub fn read(&mut self) -> Result<u8, SpiBus::Error> {
|
|
let mut buffer = [0u8];
|
|
block!(self.udp_socket.bus.transfer_frame(self.udp_socket.socket.rx_buffer(), self.read_pointer, false, &mut buffer))?;
|
|
Ok(buffer[0])
|
|
}
|
|
|
|
pub fn done(mut self) -> Result<UdpSocket<'a, SpiBus, NetworkImpl, SocketImpl>, SpiBus::Error> {
|
|
self.udp_socket.socket.set_rx_read_pointer(&mut self.udp_socket.bus, self.write_pointer)?;
|
|
self.udp_socket.socket.command(&mut self.udp_socket.bus, socketn::Command::Receive)?;
|
|
Ok(self.udp_socket)
|
|
}
|
|
|
|
fn block_until_receive_size_known(udp_socket: &mut UdpSocket<'a, SpiBus, NetworkImpl, SocketImpl>) -> Result<u16, SpiBus::Error> {
|
|
loop {
|
|
let mut sample_0 = [0u8; 2];
|
|
block!(udp_socket.bus.transfer_frame(udp_socket.socket.register(), socketn::RECEIVED_SIZE, false, &mut sample_0))?;
|
|
let mut sample_1 = [0u8; 2];
|
|
block!(udp_socket.bus.transfer_frame(udp_socket.socket.register(), socketn::RECEIVED_SIZE, false, &mut sample_1))?;
|
|
if sample_0 == sample_1 && sample_0[0] >= 8 {
|
|
break Ok(BigEndian::read_u16(&sample_0));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<'a, SpiBus: ActiveBus, NetworkImpl: Network, SocketImpl: Socket> Iterator for UdpPacket<UdpSocket<'a, SpiBus, NetworkImpl, SocketImpl>> {
|
|
type Item = Result<u8, SpiBus::Error>;
|
|
fn next(&mut self) -> Option<Self::Item> {
|
|
if self.read_pointer > self.write_pointer {
|
|
return None;
|
|
}
|
|
let mut buffer = [0u8];
|
|
let result = block!(self.udp_socket.bus.transfer_frame(self.udp_socket.socket.rx_buffer(), self.read_pointer, false, &mut buffer));
|
|
self.read_pointer += 1;
|
|
match result {
|
|
Ok(_) => Some(Ok(buffer[0])),
|
|
Result::Err(error) => Some(Err(error)),
|
|
}
|
|
}
|
|
}
|