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use std::error::Error;
use std::fmt;
use std::net::{IpAddr, Ipv4Addr, SocketAddr};
use std::sync::atomic::{AtomicBool, Ordering};
use std::sync::Arc;
use std::thread;
use std::time::{Duration, Instant};
use pnet::packet::ipv4::MutableIpv4Packet;
use pnet::packet::ipv6::MutableIpv6Packet;
use super::super::types::{Bind, Key, KeyPair, Tun};
use super::{Device, Peer, SIZE_MESSAGE_PREFIX};
#[derive(Debug)]
enum TunError {}
impl Error for TunError {
fn description(&self) -> &str {
"Generic Tun Error"
}
fn source(&self) -> Option<&(dyn Error + 'static)> {
None
}
}
impl fmt::Display for TunError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "Not Possible")
}
}
struct TunTest {}
impl Tun for TunTest {
type Error = TunError;
fn mtu(&self) -> usize {
1500
}
fn read(&self, buf: &mut [u8], offset: usize) -> Result<usize, Self::Error> {
Ok(0)
}
fn write(&self, src: &[u8]) -> Result<(), Self::Error> {
Ok(())
}
}
struct BindTest {}
impl Bind for BindTest {
type Error = BindError;
type Endpoint = SocketAddr;
fn new() -> BindTest {
BindTest {}
}
fn set_port(&self, port: u16) -> Result<(), Self::Error> {
Ok(())
}
fn get_port(&self) -> Option<u16> {
None
}
fn recv(&self, buf: &mut [u8]) -> Result<(usize, Self::Endpoint), Self::Error> {
Ok((0, "127.0.0.1:8080".parse().unwrap()))
}
fn send(&self, buf: &[u8], dst: &Self::Endpoint) -> Result<(), Self::Error> {
Ok(())
}
}
#[derive(Debug)]
enum BindError {}
impl Error for BindError {
fn description(&self) -> &str {
"Generic Bind Error"
}
fn source(&self) -> Option<&(dyn Error + 'static)> {
None
}
}
impl fmt::Display for BindError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "Not Possible")
}
}
fn dummy_keypair(initiator: bool) -> KeyPair {
let k1 = Key {
key: [0x53u8; 32],
id: 0x646e6573,
};
let k2 = Key {
key: [0x52u8; 32],
id: 0x76636572,
};
if initiator {
KeyPair {
birth: Instant::now(),
initiator: true,
send: k1,
recv: k2,
}
} else {
KeyPair {
birth: Instant::now(),
initiator: false,
send: k2,
recv: k1,
}
}
}
#[test]
fn test_outbound() {
// type for tracking events inside the router module
struct Flags {
send: AtomicBool,
recv: AtomicBool,
need_key: AtomicBool,
}
type Opaque = Arc<Flags>;
let opaque = Arc::new(Flags {
send: AtomicBool::new(false),
recv: AtomicBool::new(false),
need_key: AtomicBool::new(false),
});
// create device
let workers = 4;
let router = Device::new(
workers,
TunTest {},
BindTest {},
|t: &Opaque, data: bool, sent: bool| t.send.store(true, Ordering::SeqCst),
|t: &Opaque, data: bool, sent: bool| t.recv.store(true, Ordering::SeqCst),
|t: &Opaque| t.need_key.store(true, Ordering::SeqCst),
);
// create peer
let peer = router.new_peer(opaque.clone());
let tests = vec![
("192.168.1.0", 24, "192.168.1.20", true),
("172.133.133.133", 32, "172.133.133.133", true),
("172.133.133.133", 32, "172.133.133.132", false),
(
"2001:db8::ff00:42:0000",
112,
"2001:db8::ff00:42:3242",
true,
),
(
"2001:db8::ff00:42:8000",
113,
"2001:db8::ff00:42:0660",
false,
),
(
"2001:db8::ff00:42:8000",
113,
"2001:db8::ff00:42:ffff",
true,
),
];
peer.add_keypair(dummy_keypair(true));
for (mask, len, ip, okay) in &tests {
opaque.send.store(false, Ordering::SeqCst);
opaque.recv.store(false, Ordering::SeqCst);
opaque.need_key.store(false, Ordering::SeqCst);
let mask: IpAddr = mask.parse().unwrap();
// map subnet to peer
peer.add_subnet(mask, *len);
// create "IP packet"
let mut msg = Vec::<u8>::new();
msg.resize(SIZE_MESSAGE_PREFIX + 1024, 0);
if mask.is_ipv4() {
let mut packet = MutableIpv4Packet::new(&mut msg[SIZE_MESSAGE_PREFIX..]).unwrap();
packet.set_destination(ip.parse().unwrap());
packet.set_version(4);
} else {
let mut packet = MutableIpv6Packet::new(&mut msg[SIZE_MESSAGE_PREFIX..]).unwrap();
packet.set_destination(ip.parse().unwrap());
packet.set_version(6);
}
// cryptkey route the IP packet
let res = router.send(msg);
// allow some scheduling
thread::sleep(Duration::from_millis(1));
if *okay {
// cryptkey routing succeeded
assert!(res.is_ok());
// attempted to send message
assert_eq!(opaque.need_key.load(Ordering::Acquire), false);
assert_eq!(opaque.send.load(Ordering::Acquire), true);
assert_eq!(opaque.recv.load(Ordering::Acquire), false);
} else {
// no such cryptkey route
assert!(res.is_err());
// did not attempt to send message
assert_eq!(opaque.need_key.load(Ordering::Acquire), false);
assert_eq!(opaque.send.load(Ordering::Acquire), false);
assert_eq!(opaque.recv.load(Ordering::Acquire), false);
}
// clear subnets for next test
peer.remove_subnets();
}
}
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