mod utils;
use log::debug;
use std::collections::BTreeMap;
use std::fmt::Write;
use std::os::unix::io::AsRawFd;
use std::str;
use smoltcp::iface::{InterfaceBuilder, NeighborCache};
use smoltcp::phy::{wait as phy_wait, Device, Medium};
use smoltcp::socket::{TcpSocket, TcpSocketBuffer};
use smoltcp::socket::{UdpPacketMetadata, UdpSocket, UdpSocketBuffer};
use smoltcp::time::{Duration, Instant};
use smoltcp::wire::{EthernetAddress, IpAddress, IpCidr};
fn main() {
utils::setup_logging("");
let (mut opts, mut free) = utils::create_options();
utils::add_tuntap_options(&mut opts, &mut free);
utils::add_middleware_options(&mut opts, &mut free);
let mut matches = utils::parse_options(&opts, free);
let device = utils::parse_tuntap_options(&mut matches);
let fd = device.as_raw_fd();
let device = utils::parse_middleware_options(&mut matches, device, false);
let neighbor_cache = NeighborCache::new(BTreeMap::new());
let udp_rx_buffer = UdpSocketBuffer::new(vec![UdpPacketMetadata::EMPTY], vec![0; 64]);
let udp_tx_buffer = UdpSocketBuffer::new(vec![UdpPacketMetadata::EMPTY], vec![0; 128]);
let udp_socket = UdpSocket::new(udp_rx_buffer, udp_tx_buffer);
let tcp1_rx_buffer = TcpSocketBuffer::new(vec![0; 64]);
let tcp1_tx_buffer = TcpSocketBuffer::new(vec![0; 128]);
let tcp1_socket = TcpSocket::new(tcp1_rx_buffer, tcp1_tx_buffer);
let tcp2_rx_buffer = TcpSocketBuffer::new(vec![0; 64]);
let tcp2_tx_buffer = TcpSocketBuffer::new(vec![0; 128]);
let tcp2_socket = TcpSocket::new(tcp2_rx_buffer, tcp2_tx_buffer);
let tcp3_rx_buffer = TcpSocketBuffer::new(vec![0; 65535]);
let tcp3_tx_buffer = TcpSocketBuffer::new(vec![0; 65535]);
let tcp3_socket = TcpSocket::new(tcp3_rx_buffer, tcp3_tx_buffer);
let tcp4_rx_buffer = TcpSocketBuffer::new(vec![0; 65535]);
let tcp4_tx_buffer = TcpSocketBuffer::new(vec![0; 65535]);
let tcp4_socket = TcpSocket::new(tcp4_rx_buffer, tcp4_tx_buffer);
let ethernet_addr = EthernetAddress([0x02, 0x00, 0x00, 0x00, 0x00, 0x01]);
let ip_addrs = [
IpCidr::new(IpAddress::v4(192, 168, 69, 1), 24),
IpCidr::new(IpAddress::v6(0xfdaa, 0, 0, 0, 0, 0, 0, 1), 64),
IpCidr::new(IpAddress::v6(0xfe80, 0, 0, 0, 0, 0, 0, 1), 64),
];
let medium = device.capabilities().medium;
let mut builder = InterfaceBuilder::new(device, vec![]).ip_addrs(ip_addrs);
if medium == Medium::Ethernet {
builder = builder
.hardware_addr(ethernet_addr.into())
.neighbor_cache(neighbor_cache);
}
let mut iface = builder.finalize();
let udp_handle = iface.add_socket(udp_socket);
let tcp1_handle = iface.add_socket(tcp1_socket);
let tcp2_handle = iface.add_socket(tcp2_socket);
let tcp3_handle = iface.add_socket(tcp3_socket);
let tcp4_handle = iface.add_socket(tcp4_socket);
let mut tcp_6970_active = false;
loop {
let timestamp = Instant::now();
match iface.poll(timestamp) {
Ok(_) => {}
Err(e) => {
debug!("poll error: {}", e);
}
}
let socket = iface.get_socket::<UdpSocket>(udp_handle);
if !socket.is_open() {
socket.bind(6969).unwrap()
}
let client = match socket.recv() {
Ok((data, endpoint)) => {
debug!(
"udp:6969 recv data: {:?} from {}",
str::from_utf8(data).unwrap(),
endpoint
);
Some(endpoint)
}
Err(_) => None,
};
if let Some(endpoint) = client {
let data = b"hello\n";
debug!(
"udp:6969 send data: {:?}",
str::from_utf8(data.as_ref()).unwrap()
);
socket.send_slice(data, endpoint).unwrap();
}
let socket = iface.get_socket::<TcpSocket>(tcp1_handle);
if !socket.is_open() {
socket.listen(6969).unwrap();
}
if socket.can_send() {
debug!("tcp:6969 send greeting");
writeln!(socket, "hello").unwrap();
debug!("tcp:6969 close");
socket.close();
}
let socket = iface.get_socket::<TcpSocket>(tcp2_handle);
if !socket.is_open() {
socket.listen(6970).unwrap()
}
if socket.is_active() && !tcp_6970_active {
debug!("tcp:6970 connected");
} else if !socket.is_active() && tcp_6970_active {
debug!("tcp:6970 disconnected");
}
tcp_6970_active = socket.is_active();
if socket.may_recv() {
let data = socket
.recv(|buffer| {
let recvd_len = buffer.len();
let mut data = buffer.to_owned();
if !data.is_empty() {
debug!(
"tcp:6970 recv data: {:?}",
str::from_utf8(data.as_ref()).unwrap_or("(invalid utf8)")
);
data = data.split(|&b| b == b'\n').collect::<Vec<_>>().concat();
data.reverse();
data.extend(b"\n");
}
(recvd_len, data)
})
.unwrap();
if socket.can_send() && !data.is_empty() {
debug!(
"tcp:6970 send data: {:?}",
str::from_utf8(data.as_ref()).unwrap_or("(invalid utf8)")
);
socket.send_slice(&data[..]).unwrap();
}
} else if socket.may_send() {
debug!("tcp:6970 close");
socket.close();
}
let socket = iface.get_socket::<TcpSocket>(tcp3_handle);
if !socket.is_open() {
socket.listen(6971).unwrap();
socket.set_keep_alive(Some(Duration::from_millis(1000)));
socket.set_timeout(Some(Duration::from_millis(2000)));
}
if socket.may_recv() {
socket
.recv(|buffer| {
if !buffer.is_empty() {
debug!("tcp:6971 recv {:?} octets", buffer.len());
}
(buffer.len(), ())
})
.unwrap();
} else if socket.may_send() {
socket.close();
}
let socket = iface.get_socket::<TcpSocket>(tcp4_handle);
if !socket.is_open() {
socket.listen(6972).unwrap()
}
if socket.may_send() {
socket
.send(|data| {
if !data.is_empty() {
debug!("tcp:6972 send {:?} octets", data.len());
for (i, b) in data.iter_mut().enumerate() {
*b = (i % 256) as u8;
}
}
(data.len(), ())
})
.unwrap();
}
phy_wait(fd, iface.poll_delay(timestamp)).expect("wait error");
}
}