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Code Issues Releases Wiki Activity

Compiles but does not work

This commit is contained in:
Dennis Schwerdel 2021-02-15 13:46:55 +01:00
parent caedec6fae
commit dd168139f0
7 changed files with 437 additions and 706 deletions
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32
src/crypto/common.rs
View File

@ -1,7 +1,7 @@
use super::{core::test_speed, rotate::RotationState}; use super::{core::test_speed, rotate::RotationState};
pub use super::{ pub use super::{
core::{CryptoCore, EXTRA_LEN, TAG_LEN}, core::{CryptoCore, EXTRA_LEN, TAG_LEN},
init::{is_init_message, INIT_MESSAGE_FIRST_BYTE, InitState, InitResult} init::{is_init_message, InitResult, InitState, INIT_MESSAGE_FIRST_BYTE}
}; };
use crate::{ use crate::{
error::Error, error::Error,
@ -182,6 +182,14 @@ impl Crypto {
Ok(keypair) Ok(keypair)
} }
pub fn public_key_from_private_key(privkey: &str) -> Result<String, Error> {
let privkey = from_base62(privkey).map_err(|_| Error::InvalidConfig("Failed to parse private key"))?;
let keypair = Ed25519KeyPair::from_seed_unchecked(&privkey)
.map_err(|_| Error::InvalidConfig("Key rejected by crypto library"))?;
let pubkey = to_base62(keypair.public_key().as_ref());
Ok(pubkey)
}
fn parse_public_key(pubkey: &str) -> Result<Ed25519PublicKey, Error> { fn parse_public_key(pubkey: &str) -> Result<Ed25519PublicKey, Error> {
let pubkey = from_base62(pubkey).map_err(|_| Error::InvalidConfig("Failed to parse public key"))?; let pubkey = from_base62(pubkey).map_err(|_| Error::InvalidConfig("Failed to parse public key"))?;
if pubkey.len() != ED25519_PUBLIC_KEY_LEN { if pubkey.len() != ED25519_PUBLIC_KEY_LEN {
@ -295,7 +303,7 @@ impl PeerCrypto {
} }
} }
pub fn every_second(&mut self, out: &mut MsgBuffer) -> MessageResult { pub fn every_second(&mut self, out: &mut MsgBuffer) {
out.clear(); out.clear();
if let PeerCrypto::Encrypted { core, rotation, rotate_counter, algorithm, .. } = self { if let PeerCrypto::Encrypted { core, rotation, rotate_counter, algorithm, .. } = self {
core.every_second(); core.every_second();
@ -309,11 +317,9 @@ impl PeerCrypto {
if !out.is_empty() { if !out.is_empty() {
out.prepend_byte(MESSAGE_TYPE_ROTATION); out.prepend_byte(MESSAGE_TYPE_ROTATION);
self.encrypt_message(out); self.encrypt_message(out);
return MessageResult::Reply
} }
} }
} }
MessageResult::None
} }
} }
@ -357,9 +363,9 @@ mod tests {
assert_eq!(res, InitResult::Success { peer_payload: vec![], is_initiator: true }); assert_eq!(res, InitResult::Success { peer_payload: vec![], is_initiator: true });
assert!(msg.is_empty()); assert!(msg.is_empty());
let node1 = node1.finish(&mut msg); let mut node1 = node1.finish(&mut msg);
assert!(msg.is_empty()); assert!(msg.is_empty());
let node2 = node2.finish(&mut msg); let mut node2 = node2.finish(&mut msg);
assert!(msg.is_empty()); assert!(msg.is_empty());
debug!("Node1 <- Node2"); debug!("Node1 <- Node2");
@ -377,22 +383,16 @@ mod tests {
let res = node2.handle_message(&mut buffer).unwrap(); let res = node2.handle_message(&mut buffer).unwrap();
assert_eq!(res, MessageResult::Message(1)); assert_eq!(res, MessageResult::Message(1));
match node1.every_second(&mut msg) { node1.every_second(&mut msg);
MessageResult::None => (), if !msg.is_empty() {
MessageResult::Reply => {
let res = node2.handle_message(&mut msg).unwrap(); let res = node2.handle_message(&mut msg).unwrap();
assert_eq!(res, MessageResult::None); assert_eq!(res, MessageResult::None);
} }
other => assert_eq!(other, MessageResult::None) node2.every_second(&mut msg);
} if !msg.is_empty() {
match node2.every_second(&mut msg) {
MessageResult::None => (),
MessageResult::Reply => {
let res = node1.handle_message(&mut msg).unwrap(); let res = node1.handle_message(&mut msg).unwrap();
assert_eq!(res, MessageResult::None); assert_eq!(res, MessageResult::None);
} }
other => assert_eq!(other, MessageResult::None)
}
} }
} }
} }

10
src/crypto/core.rs
View File

@ -258,7 +258,7 @@ pub fn create_dummy_pair(algo: &'static aead::Algorithm) -> (CryptoCore, CryptoC
pub fn test_speed(algo: &'static aead::Algorithm, max_time: &Duration) -> f64 { pub fn test_speed(algo: &'static aead::Algorithm, max_time: &Duration) -> f64 {
let mut buffer = MsgBuffer::new(EXTRA_LEN); let mut buffer = MsgBuffer::new(EXTRA_LEN);
buffer.set_length(1000); buffer.set_length(1000);
let (mut sender, mut receiver) = create_dummy_pair(algo); let (sender, receiver) = create_dummy_pair(algo);
let mut iterations = 0; let mut iterations = 0;
let start = Instant::now(); let start = Instant::now();
while (Instant::now() - start).as_nanos() < max_time.as_nanos() { while (Instant::now() - start).as_nanos() < max_time.as_nanos() {
@ -290,7 +290,7 @@ mod tests {
} }
fn test_encrypt_decrypt(algo: &'static aead::Algorithm) { fn test_encrypt_decrypt(algo: &'static aead::Algorithm) {
let (mut sender, mut receiver) = create_dummy_pair(algo); let (sender, receiver) = create_dummy_pair(algo);
let plain = random_data(1000); let plain = random_data(1000);
let mut buffer = MsgBuffer::new(EXTRA_LEN); let mut buffer = MsgBuffer::new(EXTRA_LEN);
buffer.clone_from(&plain); buffer.clone_from(&plain);
@ -318,7 +318,7 @@ mod tests {
fn test_tampering(algo: &'static aead::Algorithm) { fn test_tampering(algo: &'static aead::Algorithm) {
let (mut sender, mut receiver) = create_dummy_pair(algo); let (sender, receiver) = create_dummy_pair(algo);
let plain = random_data(1000); let plain = random_data(1000);
let mut buffer = MsgBuffer::new(EXTRA_LEN); let mut buffer = MsgBuffer::new(EXTRA_LEN);
buffer.clone_from(&plain); buffer.clone_from(&plain);
@ -358,7 +358,7 @@ mod tests {
} }
fn test_nonce_pinning(algo: &'static aead::Algorithm) { fn test_nonce_pinning(algo: &'static aead::Algorithm) {
let (mut sender, mut receiver) = create_dummy_pair(algo); let (sender, receiver) = create_dummy_pair(algo);
let plain = random_data(1000); let plain = random_data(1000);
let mut buffer = MsgBuffer::new(EXTRA_LEN); let mut buffer = MsgBuffer::new(EXTRA_LEN);
buffer.clone_from(&plain); buffer.clone_from(&plain);
@ -399,7 +399,7 @@ mod tests {
} }
fn test_key_rotation(algo: &'static aead::Algorithm) { fn test_key_rotation(algo: &'static aead::Algorithm) {
let (mut sender, mut receiver) = create_dummy_pair(algo); let (sender, receiver) = create_dummy_pair(algo);
let plain = random_data(1000); let plain = random_data(1000);
let mut buffer = MsgBuffer::new(EXTRA_LEN); let mut buffer = MsgBuffer::new(EXTRA_LEN);
buffer.clone_from(&plain); buffer.clone_from(&plain);

6
src/engine/device_thread.rs
View File

@ -51,6 +51,8 @@ impl<S: Socket, D: Device, P: Protocol, TS: TimeSource> DeviceThread<S, D, P, TS
fn broadcast_msg(&mut self, type_: u8, msg: &mut MsgBuffer) -> Result<(), Error> { fn broadcast_msg(&mut self, type_: u8, msg: &mut MsgBuffer) -> Result<(), Error> {
debug!("Broadcasting message type {}, {:?} bytes to {} peers", type_, msg.len(), self.peer_crypto.count()); debug!("Broadcasting message type {}, {:?} bytes to {} peers", type_, msg.len(), self.peer_crypto.count());
let mut msg_data = MsgBuffer::new(100); let mut msg_data = MsgBuffer::new(100);
let traffic = &mut self.traffic;
let socket = &mut self.socket;
self.peer_crypto.for_each(|addr, crypto| { self.peer_crypto.for_each(|addr, crypto| {
msg_data.set_start(msg.get_start()); msg_data.set_start(msg.get_start());
msg_data.set_length(msg.len()); msg_data.set_length(msg.len());
@ -59,8 +61,8 @@ impl<S: Socket, D: Device, P: Protocol, TS: TimeSource> DeviceThread<S, D, P, TS
if let Some(crypto) = crypto { if let Some(crypto) = crypto {
crypto.encrypt(&mut msg_data); crypto.encrypt(&mut msg_data);
} }
self.traffic.count_out_traffic(addr, msg_data.len()); traffic.count_out_traffic(addr, msg_data.len());
match self.socket.send(msg_data.message(), addr) { match socket.send(msg_data.message(), addr) {
Ok(written) if written == msg_data.len() => Ok(()), Ok(written) if written == msg_data.len() => Ok(()),
Ok(_) => Err(Error::Socket("Sent out truncated packet")), Ok(_) => Err(Error::Socket("Sent out truncated packet")),
Err(e) => Err(Error::SocketIo("IOError when sending", e)) Err(e) => Err(Error::SocketIo("IOError when sending", e))

642
src/engine/mod.rs
View File

@ -167,7 +167,6 @@ impl<D: Device, P: Protocol, S: Socket, TS: TimeSource> GenericCloud<D, P, S, TS
_dummy_p: PhantomData, _dummy_p: PhantomData,
_dummy_ts: PhantomData _dummy_ts: PhantomData
}; };
res.initialize();
res res
} }
@ -268,14 +267,6 @@ impl<D: Device, P: Protocol, S: Socket, TS: TimeSource> GenericCloud<D, P, S, TS
}) })
} }
/// Connects to a node given by its address
///
/// This method connects to node by sending a `Message::Init` to it. If `addr` is a name that
/// resolves to multiple addresses, one message is sent to each of them.
/// If the node is already a connected peer or the address is blacklisted, no message is sent.
///
/// # Errors
/// This method returns `Error::NameError` if the address is a name that fails to resolve.
pub fn connect<Addr: ToSocketAddrs + fmt::Debug + Clone>(&mut self, addr: Addr) -> Result<(), Error> { pub fn connect<Addr: ToSocketAddrs + fmt::Debug + Clone>(&mut self, addr: Addr) -> Result<(), Error> {
let addrs = resolve(&addr)?.into_iter().map(mapped_addr).collect::<SmallVec<[SocketAddr; 3]>>(); let addrs = resolve(&addr)?.into_iter().map(mapped_addr).collect::<SmallVec<[SocketAddr; 3]>>();
for addr in &addrs { for addr in &addrs {
@ -293,627 +284,9 @@ impl<D: Device, P: Protocol, S: Socket, TS: TimeSource> GenericCloud<D, P, S, TS
true true
); );
} }
// Send a message to each resolved address unimplemented!()
for a in addrs {
// Ignore error this time
self.connect_sock(a).ok();
}
Ok(())
} }
fn create_node_info(&self) -> NodeInfo {
let mut peers = smallvec![];
for peer in self.peers.values() {
peers.push(PeerInfo { node_id: Some(peer.node_id), addrs: peer.addrs.clone() })
}
if peers.len() > 20 {
let mut rng = rand::thread_rng();
peers.partial_shuffle(&mut rng, 20);
peers.truncate(20);
}
NodeInfo {
node_id: self.node_id,
peers,
claims: self.claims.clone(),
peer_timeout: Some(self.peer_timeout_publish),
addrs: self.own_addresses.clone()
}
}
fn connect_sock(&mut self, addr: SocketAddr) -> Result<(), Error> {
let addr = mapped_addr(addr);
if self.peers.contains_key(&addr)
|| self.own_addresses.contains(&addr)
|| self.pending_inits.contains_key(&addr)
{
return Ok(())
}
debug!("Connecting to {:?}", addr);
let payload = self.create_node_info();
let mut peer_crypto = self.crypto.peer_instance(payload);
let mut msg = MsgBuffer::new(SPACE_BEFORE);
peer_crypto.send_ping(&mut msg);
self.pending_inits.insert(addr, peer_crypto);
self.send_to(addr, &mut msg)
}
fn crypto_housekeep(&mut self) -> Result<(), Error> {
let mut msg = MsgBuffer::new(SPACE_BEFORE);
let mut del: SmallVec<[SocketAddr; 4]> = smallvec![];
for addr in self.pending_inits.keys().copied().collect::<SmallVec<[SocketAddr; 4]>>() {
msg.clear();
match self.pending_inits.get_mut(&addr).unwrap().every_second(&mut msg) {
Err(_) => del.push(addr),
Ok(MessageResult::None) => (),
Ok(MessageResult::Reply) => self.send_to(addr, &mut msg)?,
Ok(_) => unreachable!()
}
}
for addr in self.peers.keys().copied().collect::<SmallVec<[SocketAddr; 16]>>() {
msg.clear();
match self.peers.get_mut(&addr).unwrap().crypto.every_second(&mut msg) {
Err(_) => del.push(addr),
Ok(MessageResult::None) => (),
Ok(MessageResult::Reply) => self.send_to(addr, &mut msg)?,
Ok(_) => unreachable!()
}
}
for addr in del {
self.pending_inits.remove(&addr);
if self.peers.remove(&addr).is_some() {
self.connect_sock(addr)?;
}
}
Ok(())
}
fn reconnect_to_peers(&mut self) -> Result<(), Error> {
let now = TS::now();
// Connect to those reconnect_peers that are due
for entry in self.reconnect_peers.clone() {
if entry.next > now {
continue
}
self.connect(&entry.resolved as &[SocketAddr])?;
}
for entry in &mut self.reconnect_peers {
// Schedule for next second if node is connected
for addr in &entry.resolved {
if self.peers.contains_key(&addr) {
entry.tries = 0;
entry.timeout = 1;
entry.next = now + 1;
continue
}
}
// Resolve entries anew
if let Some((ref address, ref mut next_resolve)) = entry.address {
if *next_resolve <= now {
match resolve(address as &str) {
Ok(addrs) => entry.resolved = addrs,
Err(_) => {
match resolve(&format!("{}:{}", address, DEFAULT_PORT)) {
Ok(addrs) => entry.resolved = addrs,
Err(err) => warn!("Failed to resolve {}: {}", address, err)
}
}
}
*next_resolve = now + RESOLVE_INTERVAL;
}
}
// Ignore if next attempt is already in the future
if entry.next > now {
continue
}
// Exponential back-off: every 10 tries, the interval doubles
entry.tries += 1;
if entry.tries > 10 {
entry.tries = 0;
entry.timeout *= 2;
}
// Maximum interval is one hour
if entry.timeout > MAX_RECONNECT_INTERVAL {
entry.timeout = MAX_RECONNECT_INTERVAL;
}
// Schedule next connection attempt
entry.next = now + Time::from(entry.timeout);
}
self.reconnect_peers.retain(|e| e.final_timeout.unwrap_or(now) >= now);
Ok(())
}
fn housekeep(&mut self) -> Result<(), Error> {
let now = TS::now();
let mut buffer = MsgBuffer::new(SPACE_BEFORE);
let mut del: SmallVec<[SocketAddr; 3]> = SmallVec::new();
for (&addr, ref data) in &self.peers {
if data.timeout < now {
del.push(addr);
}
}
for addr in del {
info!("Forgot peer {} due to timeout", addr_nice(addr));
self.peers.remove(&addr);
self.table.remove_claims(addr);
self.connect_sock(addr)?; // Try to reconnect
}
self.table.housekeep();
self.crypto_housekeep()?;
// Periodically extend the port-forwarding
if let Some(ref mut pfw) = self.port_forwarding {
pfw.check_extend();
}
let now = TS::now();
// Periodically reset own peers
if self.next_own_address_reset <= now {
self.reset_own_addresses().map_err(|err| Error::SocketIo("Failed to get own addresses", err))?;
self.next_own_address_reset = now + OWN_ADDRESS_RESET_INTERVAL;
}
// Periodically send peer list to peers
if self.next_peers <= now {
debug!("Send peer list to all peers");
let info = self.create_node_info();
info.encode(&mut buffer);
self.broadcast_msg(MESSAGE_TYPE_NODE_INFO, &mut buffer)?;
// Reschedule for next update
let min_peer_timeout = self.peers.iter().map(|p| p.1.peer_timeout).min().unwrap_or(DEFAULT_PEER_TIMEOUT);
let interval = min(self.update_freq as u16, max(min_peer_timeout / 2 - 60, 1));
self.next_peers = now + Time::from(interval);
}
self.reconnect_to_peers()?;
if self.next_stats_out < now {
// Write out the statistics
self.write_out_stats().map_err(|err| Error::FileIo("Failed to write stats file", err))?;
self.send_stats_to_statsd()?;
self.next_stats_out = now + STATS_INTERVAL;
self.traffic.period(Some(5));
}
if let Some(peers) = self.beacon_serializer.get_cmd_results() {
debug!("Loaded beacon with peers: {:?}", peers);
for peer in peers {
self.connect_sock(peer)?;
}
}
if self.next_beacon < now {
self.store_beacon()?;
self.load_beacon()?;
self.next_beacon = now + Time::from(self.config.beacon_interval);
}
Ok(())
}
/// Stores the beacon
fn store_beacon(&mut self) -> Result<(), Error> {
if let Some(ref path) = self.config.beacon_store {
let peers: SmallVec<[SocketAddr; 3]> =
self.own_addresses.choose_multiple(&mut thread_rng(), 3).cloned().collect();
if let Some(path) = path.strip_prefix('|') {
self.beacon_serializer
.write_to_cmd(&peers, path)
.map_err(|e| Error::BeaconIo("Failed to call beacon command", e))?;
} else {
self.beacon_serializer
.write_to_file(&peers, &path)
.map_err(|e| Error::BeaconIo("Failed to write beacon to file", e))?;
}
}
Ok(())
}
/// Loads the beacon
fn load_beacon(&mut self) -> Result<(), Error> {
let peers;
if let Some(ref path) = self.config.beacon_load {
if let Some(path) = path.strip_prefix('|') {
self.beacon_serializer
.read_from_cmd(path, Some(50))
.map_err(|e| Error::BeaconIo("Failed to call beacon command", e))?;
return Ok(())
} else {
peers = self
.beacon_serializer
.read_from_file(&path, Some(50))
.map_err(|e| Error::BeaconIo("Failed to read beacon from file", e))?;
}
} else {
return Ok(())
}
debug!("Loaded beacon with peers: {:?}", peers);
for peer in peers {
self.connect_sock(peer)?;
}
Ok(())
}
/// Writes out the statistics to a file
fn write_out_stats(&mut self) -> Result<(), io::Error> {
if let Some(ref mut f) = self.stats_file {
debug!("Writing out stats");
f.seek(SeekFrom::Start(0))?;
f.set_len(0)?;
writeln!(f, "peers:")?;
let now = TS::now();
for (addr, data) in &self.peers {
writeln!(
f,
" - \"{}\": {{ ttl_secs: {}, crypto: {} }}",
addr_nice(*addr),
data.timeout - now,
data.crypto.algorithm_name()
)?;
}
writeln!(f)?;
self.table.write_out(f)?;
writeln!(f)?;
self.traffic.write_out(f)?;
writeln!(f)?;
}
Ok(())
}
/// Sends the statistics to a statsd endpoint
fn send_stats_to_statsd(&mut self) -> Result<(), Error> {
if let Some(ref endpoint) = self.statsd_server {
let peer_traffic = self.traffic.total_peer_traffic();
let payload_traffic = self.traffic.total_payload_traffic();
let dropped = &self.traffic.dropped;
let prefix = self.config.statsd_prefix.as_ref().map(|s| s as &str).unwrap_or("vpncloud");
let msg = StatsdMsg::new()
.with_ns(prefix, |msg| {
msg.add("peer_count", self.peers.len(), "g");
msg.add("table_cache_entries", self.table.cache_len(), "g");
msg.add("table_claims", self.table.claim_len(), "g");
msg.with_ns("traffic", |msg| {
msg.with_ns("protocol", |msg| {
msg.with_ns("inbound", |msg| {
msg.add("bytes", peer_traffic.in_bytes, "c");
msg.add("packets", peer_traffic.in_packets, "c");
});
msg.with_ns("outbound", |msg| {
msg.add("bytes", peer_traffic.out_bytes, "c");
msg.add("packets", peer_traffic.out_packets, "c");
});
});
msg.with_ns("payload", |msg| {
msg.with_ns("inbound", |msg| {
msg.add("bytes", payload_traffic.in_bytes, "c");
msg.add("packets", payload_traffic.in_packets, "c");
});
msg.with_ns("outbound", |msg| {
msg.add("bytes", payload_traffic.out_bytes, "c");
msg.add("packets", payload_traffic.out_packets, "c");
});
});
});
msg.with_ns("invalid_protocol_traffic", |msg| {
msg.add("bytes", dropped.in_bytes, "c");
msg.add("packets", dropped.in_packets, "c");
});
msg.with_ns("dropped_payload", |msg| {
msg.add("bytes", dropped.out_bytes, "c");
msg.add("packets", dropped.out_packets, "c");
});
})
.build();
let msg_data = msg.as_bytes();
let addrs = resolve(endpoint)?;
if let Some(addr) = addrs.first() {
match self.socket.send(msg_data, *addr) {
Ok(written) if written == msg_data.len() => Ok(()),
Ok(_) => Err(Error::Socket("Sent out truncated packet")),
Err(e) => Err(Error::SocketIo("IOError when sending", e))
}?
} else {
error!("Failed to resolve statsd server {}", endpoint);
}
}
Ok(())
}
pub fn handle_interface_data(&mut self, data: &mut MsgBuffer) -> Result<(), Error> {
// HOT PATH
let (src, dst) = P::parse(data.message())?;
debug!("Read data from interface: src: {}, dst: {}, {} bytes", src, dst, data.len());
self.traffic.count_out_payload(dst, src, data.len());
match self.table.lookup(dst) {
Some(addr) => {
// HOT PATH
// Peer found for destination
debug!("Found destination for {} => {}", dst, addr);
self.send_msg(addr, MESSAGE_TYPE_DATA, data)?;
if !self.peers.contains_key(&addr) {
// COLD PATH
// If the peer is not actually connected, remove the entry in the table and try
// to reconnect.
warn!("Destination for {} not found in peers: {}", dst, addr_nice(addr));
self.table.remove_claims(addr);
self.connect_sock(addr)?;
}
}
None => {
// COLD PATH
if self.broadcast {
debug!("No destination for {} found, broadcasting", dst);
self.broadcast_msg(MESSAGE_TYPE_DATA, data)?;
} else {
debug!("No destination for {} found, dropping", dst);
self.traffic.count_dropped_payload(data.len());
}
}
}
Ok(())
}
fn add_new_peer(&mut self, addr: SocketAddr, info: NodeInfo) -> Result<(), Error> {
info!("Added peer {}", addr_nice(addr));
self.config.call_hook(
"peer_connected",
vec![
("PEER", format!("{:?}", addr_nice(addr))),
("IFNAME", self.device.ifname().to_owned()),
("CLAIMS", info.claims.iter().map(|r| format!("{:?}", r)).collect::<Vec<String>>().join(" ")),
("NODE_ID", bytes_to_hex(&info.node_id)),
],
true
);
if let Some(init) = self.pending_inits.remove(&addr) {
self.peers.insert(addr, PeerData {
addrs: info.addrs.clone(),
crypto: init,
node_id: info.node_id,
peer_timeout: info.peer_timeout.unwrap_or(DEFAULT_PEER_TIMEOUT),
last_seen: TS::now(),
timeout: TS::now() + self.config.peer_timeout as Time
});
self.update_peer_info(addr, Some(info))?;
} else {
error!("No init for new peer {}", addr_nice(addr));
}
Ok(())
}
fn remove_peer(&mut self, addr: SocketAddr) {
if let Some(peer) = self.peers.remove(&addr) {
info!("Closing connection to {}", addr_nice(addr));
self.table.remove_claims(addr);
self.config.call_hook(
"peer_disconnected",
vec![
("PEER", format!("{:?}", addr)),
("IFNAME", self.device.ifname().to_owned()),
("NODE_ID", bytes_to_hex(&peer.node_id)),
],
true
);
}
}
fn connect_to_peers(&mut self, peers: &[PeerInfo]) -> Result<(), Error> {
'outer: for peer in peers {
for addr in &peer.addrs {
if self.peers.contains_key(addr) {
continue 'outer
}
}
if let Some(node_id) = peer.node_id {
if self.node_id == node_id {
continue 'outer
}
for p in self.peers.values() {
if p.node_id == node_id {
continue 'outer
}
}
}
self.connect(&peer.addrs as &[SocketAddr])?;
}
Ok(())
}
fn update_peer_info(&mut self, addr: SocketAddr, info: Option<NodeInfo>) -> Result<(), Error> {
if let Some(peer) = self.peers.get_mut(&addr) {
peer.last_seen = TS::now();
peer.timeout = TS::now() + self.config.peer_timeout as Time
} else {
error!("Received peer update from non peer {}", addr_nice(addr));
return Ok(())
}
if let Some(info) = info {
debug!("Adding claims of peer {}: {:?}", addr_nice(addr), info.claims);
self.table.set_claims(addr, info.claims);
debug!("Received {} peers from {}: {:?}", info.peers.len(), addr_nice(addr), info.peers);
self.connect_to_peers(&info.peers)?;
}
Ok(())
}
fn handle_payload_from(&mut self, peer: SocketAddr, data: &mut MsgBuffer) -> Result<(), Error> {
// HOT PATH
let (src, dst) = P::parse(data.message())?;
let len = data.len();
debug!("Writing data to device: {} bytes", len);
self.traffic.count_in_payload(src, dst, len);
if let Err(e) = self.device.write(data) {
error!("Failed to send via device: {}", e);
return Err(e)
}
if self.learning {
// Learn single address
self.table.cache(src, peer);
}
Ok(())
}
fn handle_message(
&mut self, src: SocketAddr, msg_result: MessageResult<NodeInfo>, data: &mut MsgBuffer
) -> Result<(), Error> {
// HOT PATH
match msg_result {
MessageResult::Message(type_) => {
// HOT PATH
match type_ {
MESSAGE_TYPE_DATA => {
// HOT PATH
self.handle_payload_from(src, data)?
}
MESSAGE_TYPE_NODE_INFO => {
// COLD PATH
let info = match NodeInfo::decode(Cursor::new(data.message())) {
Ok(val) => val,
Err(err) => {
self.traffic.count_invalid_protocol(data.len());
return Err(err)
}
};
self.update_peer_info(src, Some(info))?
}
MESSAGE_TYPE_KEEPALIVE => {
// COLD PATH
self.update_peer_info(src, None)?
}
MESSAGE_TYPE_CLOSE => {
// COLD PATH
self.remove_peer(src)
}
_ => {
// COLD PATH
self.traffic.count_invalid_protocol(data.len());
return Err(Error::Message("Unknown message type"))
}
}
}
MessageResult::Initialized(info) => {
// COLD PATH
self.add_new_peer(src, info)?
}
MessageResult::InitializedWithReply(info) => {
// COLD PATH
self.add_new_peer(src, info)?;
self.send_to(src, data)?
}
MessageResult::Reply => {
// COLD PATH
self.send_to(src, data)?
}
MessageResult::None => {
// COLD PATH
}
}
Ok(())
}
pub fn handle_net_message(&mut self, src: SocketAddr, data: &mut MsgBuffer) -> Result<(), Error> {
// HOT PATH
let src = mapped_addr(src);
debug!("Received {} bytes from {}", data.len(), src);
let msg_result = if let Some(init) = self.pending_inits.get_mut(&src) {
// COLD PATH
init.handle_message(data)
} else if is_init_message(data.message()) {
// COLD PATH
let mut result = None;
if let Some(peer) = self.peers.get_mut(&src) {
if peer.crypto.has_init() {
result = Some(peer.crypto.handle_message(data))
}
}
if let Some(result) = result {
result
} else {
let mut init = self.crypto.peer_instance(self.create_node_info());
let msg_result = init.handle_message(data);
match msg_result {
Ok(res) => {
self.config.call_hook(
"peer_connecting",
vec![
("PEER", format!("{:?}", addr_nice(src))),
("IFNAME", self.device.ifname().to_owned()),
],
true
);
self.pending_inits.insert(src, init);
Ok(res)
}
Err(err) => {
self.traffic.count_invalid_protocol(data.len());
return Err(err)
}
}
}
} else if let Some(peer) = self.peers.get_mut(&src) {
// HOT PATH
peer.crypto.handle_message(data)
} else {
// COLD PATH
info!("Ignoring non-init message from unknown peer {}", addr_nice(src));
self.traffic.count_invalid_protocol(data.len());
return Ok(())
};
// HOT PATH
match msg_result {
Ok(val) => {
// HOT PATH
self.handle_message(src, val, data)
},
Err(err) => {
// COLD PATH
self.traffic.count_invalid_protocol(data.len());
Err(err)
}
}
}
fn initialize(&mut self) {
if let Err(err) = self.reset_own_addresses() {
error!("Failed to obtain local addresses: {}", err)
}
}
fn handle_socket_event(&mut self, buffer: &mut MsgBuffer) {
// HOT PATH
let src = try_fail!(self.socket.receive(buffer), "Failed to read from network socket: {}");
self.traffic.count_in_traffic(src, buffer.len());
match self.handle_net_message(src, buffer) {
Err(e @ Error::CryptoInitFatal(_)) => {
// COLD PATH
debug!("Fatal crypto init error from {}: {}", src, e);
info!("Closing pending connection to {} due to error in crypto init", addr_nice(src));
self.pending_inits.remove(&src);
self.config.call_hook(
"peer_disconnected",
vec![("PEER", format!("{:?}", addr_nice(src))), ("IFNAME", self.device.ifname().to_owned())],
true
);
}
Err(e @ Error::CryptoInit(_)) => {
// COLD PATH
debug!("Recoverable init error from {}: {}", src, e);
info!("Ignoring invalid init message from peer {}", addr_nice(src));
}
Err(e) => {
// COLD PATH
error!("{}", e);
}
Ok(_) => {} // HOT PATH
}
}
fn handle_device_event(&mut self, buffer: &mut MsgBuffer) {
// HOT PATH
try_fail!(self.device.read(buffer), "Failed to read from device: {}");
if let Err(e) = self.handle_interface_data(buffer) {
error!("{}", e);
}
}
/// The main method of the node
///
/// This method will use epoll to wait in the sockets and the device at the same time.
/// It will read from the sockets, decode and decrypt the message and then call the
/// `handle_net_message` method. It will also read from the device and call
/// `handle_interface_data` for each packet read.
/// Also, this method will call `housekeep` every second.
pub fn run(&mut self) { pub fn run(&mut self) {
let ctrlc = CtrlC::new(); let ctrlc = CtrlC::new();
let waiter = try_fail!(WaitImpl::new(self.socket.as_raw_fd(), self.device.as_raw_fd(), 1000), "Failed to setup poll: {}"); let waiter = try_fail!(WaitImpl::new(self.socket.as_raw_fd(), self.device.as_raw_fd(), 1000), "Failed to setup poll: {}");
@ -932,8 +305,8 @@ impl<D: Device, P: Protocol, S: Socket, TS: TimeSource> GenericCloud<D, P, S, TS
poll_error = true; poll_error = true;
} }
WaitResult::Timeout => {} WaitResult::Timeout => {}
WaitResult::Socket => self.handle_socket_event(&mut buffer), WaitResult::Socket => unimplemented!(),
WaitResult::Device => self.handle_device_event(&mut buffer) WaitResult::Device => unimplemented!()
} }
if self.next_housekeep < TS::now() { if self.next_housekeep < TS::now() {
// COLD PATH // COLD PATH
@ -941,9 +314,6 @@ impl<D: Device, P: Protocol, S: Socket, TS: TimeSource> GenericCloud<D, P, S, TS
if ctrlc.was_pressed() { if ctrlc.was_pressed() {
break break
} }
if let Err(e) = self.housekeep() {
error!("{}", e)
}
self.next_housekeep = TS::now() + 1 self.next_housekeep = TS::now() + 1
} }
} }
@ -980,16 +350,16 @@ impl<P: Protocol> GenericCloud<MockDevice, P, MockSocket, MockTimeSource> {
pub fn trigger_socket_event(&mut self) { pub fn trigger_socket_event(&mut self) {
let mut buffer = MsgBuffer::new(SPACE_BEFORE); let mut buffer = MsgBuffer::new(SPACE_BEFORE);
self.handle_socket_event(&mut buffer); unimplemented!()
} }
pub fn trigger_device_event(&mut self) { pub fn trigger_device_event(&mut self) {
let mut buffer = MsgBuffer::new(SPACE_BEFORE); let mut buffer = MsgBuffer::new(SPACE_BEFORE);
self.handle_device_event(&mut buffer); unimplemented!()
} }
pub fn trigger_housekeep(&mut self) { pub fn trigger_housekeep(&mut self) {
assert!(self.housekeep().is_ok()) unimplemented!()
} }
pub fn is_connected(&self, addr: &SocketAddr) -> bool { pub fn is_connected(&self, addr: &SocketAddr) -> bool {

59
src/engine/shared.rs
View File

@ -1,15 +1,20 @@
use crate::error::Error;
use crate::{ use crate::{
crypto::CryptoCore, crypto::CryptoCore,
engine::{Hash, PeerData, TimeSource}, engine::{Hash, PeerData, TimeSource},
error::Error,
messages::NodeInfo, messages::NodeInfo,
table::ClaimTable, table::ClaimTable,
traffic::TrafficStats, traffic::{TrafficStats, TrafficEntry},
types::{Address, NodeId, RangeList}, types::{Address, NodeId, RangeList},
util::MsgBuffer util::MsgBuffer
}; };
use parking_lot::Mutex; use parking_lot::Mutex;
use std::{collections::HashMap, net::SocketAddr, sync::Arc}; use std::{
collections::HashMap,
io::{self, Write},
net::SocketAddr,
sync::Arc
};
pub struct SharedPeerCrypto { pub struct SharedPeerCrypto {
peers: Arc<Mutex<HashMap<SocketAddr, Option<Arc<CryptoCore>>, Hash>>> peers: Arc<Mutex<HashMap<SocketAddr, Option<Arc<CryptoCore>>, Hash>>>
@ -29,7 +34,9 @@ impl SharedPeerCrypto {
} }
} }
pub fn for_each(&mut self, mut callback: impl FnMut(SocketAddr, Option<Arc<CryptoCore>>) -> Result<(), Error>) -> Result<(), Error> { pub fn for_each(
&mut self, mut callback: impl FnMut(SocketAddr, Option<Arc<CryptoCore>>) -> Result<(), Error>
) -> Result<(), Error> {
let mut peers = self.peers.lock(); let mut peers = self.peers.lock();
for (k, v) in peers.iter_mut() { for (k, v) in peers.iter_mut() {
callback(*k, v.clone())? callback(*k, v.clone())?
@ -75,6 +82,26 @@ impl SharedTraffic {
pub fn count_invalid_protocol(&self, bytes: usize) { pub fn count_invalid_protocol(&self, bytes: usize) {
self.traffic.lock().count_invalid_protocol(bytes); self.traffic.lock().count_invalid_protocol(bytes);
} }
pub fn period(&mut self, cleanup_idle: Option<usize>) {
self.traffic.lock().period(cleanup_idle)
}
pub fn write_out<W: Write>(&self, out: &mut W) -> Result<(), io::Error> {
self.traffic.lock().write_out(out)
}
pub fn total_peer_traffic(&self) -> TrafficEntry {
self.traffic.lock().total_peer_traffic()
}
pub fn total_payload_traffic(&self) -> TrafficEntry {
self.traffic.lock().total_payload_traffic()
}
pub fn dropped(&self) -> TrafficEntry {
self.traffic.lock().dropped.clone()
}
} }
@ -87,19 +114,35 @@ impl<TS: TimeSource> SharedTable<TS> {
// TODO sync if needed // TODO sync if needed
} }
pub fn lookup(&self, addr: Address) -> Option<SocketAddr> { pub fn lookup(&mut self, addr: Address) -> Option<SocketAddr> {
self.table.lock().lookup(addr) self.table.lock().lookup(addr)
} }
pub fn set_claims(&self, peer: SocketAddr, claims: RangeList) { pub fn set_claims(&mut self, peer: SocketAddr, claims: RangeList) {
self.table.lock().set_claims(peer, claims) self.table.lock().set_claims(peer, claims)
} }
pub fn remove_claims(&self, peer: SocketAddr) { pub fn remove_claims(&mut self, peer: SocketAddr) {
self.table.lock().remove_claims(peer) self.table.lock().remove_claims(peer)
} }
pub fn cache(&self, addr: Address, peer: SocketAddr) { pub fn cache(&mut self, addr: Address, peer: SocketAddr) {
self.table.lock().cache(addr, peer) self.table.lock().cache(addr, peer)
} }
pub fn housekeep(&mut self) {
self.table.lock().housekeep()
}
pub fn write_out<W: Write>(&self, out: &mut W) -> Result<(), io::Error> {
self.table.lock().write_out(out)
}
pub fn cache_len(&self) -> usize {
self.table.lock().cache_len()
}
pub fn claim_len(&self) -> usize {
self.table.lock().claim_len()
}
} }

380
src/engine/socket_thread.rs
View File

@ -4,26 +4,48 @@ use super::{
}; };
use crate::{ use crate::{
config::DEFAULT_PEER_TIMEOUT, beacon::BeaconSerializer,
crypto::{is_init_message, MessageResult, PeerCrypto, InitState, InitResult}, config::{DEFAULT_PEER_TIMEOUT, DEFAULT_PORT},
crypto::{is_init_message, InitResult, InitState, MessageResult},
engine::{addr_nice, resolve, Hash, PeerData}, engine::{addr_nice, resolve, Hash, PeerData},
error::Error, error::Error,
messages::{AddrList, NodeInfo, PeerInfo}, messages::{AddrList, NodeInfo, PeerInfo, MESSAGE_TYPE_NODE_INFO},
net::{mapped_addr, Socket}, net::{mapped_addr, Socket},
port_forwarding::PortForwarding,
types::{NodeId, RangeList}, types::{NodeId, RangeList},
util::{MsgBuffer, Time, TimeSource}, util::{MsgBuffer, StatsdMsg, Time, TimeSource},
Config, Crypto, Device, Protocol Config, Crypto, Device, Protocol
}; };
use rand::{seq::SliceRandom}; use rand::{random, seq::SliceRandom, thread_rng};
use smallvec::{smallvec, SmallVec}; use smallvec::{smallvec, SmallVec};
use std::{ use std::{
cmp::{max, min},
collections::HashMap, collections::HashMap,
fmt, fmt,
io::Cursor, fs::File,
io,
io::{Write, Cursor, Seek, SeekFrom},
marker::PhantomData, marker::PhantomData,
net::{SocketAddr, ToSocketAddrs}, net::{SocketAddr, ToSocketAddrs}
}; };
const MAX_RECONNECT_INTERVAL: u16 = 3600;
const RESOLVE_INTERVAL: Time = 300;
const OWN_ADDRESS_RESET_INTERVAL: Time = 300;
pub const STATS_INTERVAL: Time = 60;
#[derive(Clone)]
pub struct ReconnectEntry {
address: Option<(String, Time)>,
resolved: AddrList,
tries: u16,
timeout: u16,
next: Time,
final_timeout: Option<Time>
}
pub struct SocketThread<S: Socket, D: Device, P: Protocol, TS: TimeSource> { pub struct SocketThread<S: Socket, D: Device, P: Protocol, TS: TimeSource> {
// Read-only fields // Read-only fields
node_id: NodeId, node_id: NodeId,
@ -31,6 +53,7 @@ pub struct SocketThread<S: Socket, D: Device, P: Protocol, TS: TimeSource> {
config: Config, config: Config,
peer_timeout_publish: u16, peer_timeout_publish: u16,
learning: bool, learning: bool,
update_freq: u16,
_dummy_ts: PhantomData<TS>, _dummy_ts: PhantomData<TS>,
_dummy_p: PhantomData<P>, _dummy_p: PhantomData<P>,
// Socket-only fields // Socket-only fields
@ -38,12 +61,23 @@ pub struct SocketThread<S: Socket, D: Device, P: Protocol, TS: TimeSource> {
device: D, device: D,
next_housekeep: Time, next_housekeep: Time,
own_addresses: AddrList, own_addresses: AddrList,
next_own_address_reset: Time,
pending_inits: HashMap<SocketAddr, InitState<NodeInfo>, Hash>, pending_inits: HashMap<SocketAddr, InitState<NodeInfo>, Hash>,
crypto: Crypto, crypto: Crypto,
peers: HashMap<SocketAddr, PeerData, Hash>, peers: HashMap<SocketAddr, PeerData, Hash>,
next_peers: Time,
next_stats_out: Time,
next_beacon: Time,
beacon_serializer: BeaconSerializer<TS>,
stats_file: Option<File>,
statsd_server: Option<String>,
reconnect_peers: SmallVec<[ReconnectEntry; 3]>,
// Shared fields // Shared fields
peer_crypto: SharedPeerCrypto,
traffic: SharedTraffic, traffic: SharedTraffic,
table: SharedTable<TS> table: SharedTable<TS>,
// Should not be here
port_forwarding: Option<PortForwarding> // TODO: 3rd thread
} }
impl<S: Socket, D: Device, P: Protocol, TS: TimeSource> SocketThread<S, D, P, TS> { impl<S: Socket, D: Device, P: Protocol, TS: TimeSource> SocketThread<S, D, P, TS> {
@ -58,6 +92,26 @@ impl<S: Socket, D: Device, P: Protocol, TS: TimeSource> SocketThread<S, D, P, TS
} }
} }
#[inline]
fn broadcast_msg(&mut self, type_: u8, msg: &mut MsgBuffer) -> Result<(), Error> {
debug!("Broadcasting message type {}, {:?} bytes to {} peers", type_, msg.len(), self.peers.len());
let mut msg_data = MsgBuffer::new(100);
for (addr, peer) in &mut self.peers {
msg_data.set_start(msg.get_start());
msg_data.set_length(msg.len());
msg_data.message_mut().clone_from_slice(msg.message());
msg_data.prepend_byte(type_);
peer.crypto.encrypt_message(&mut msg_data);
self.traffic.count_out_traffic(*addr, msg_data.len());
match self.socket.send(msg_data.message(), *addr) {
Ok(written) if written == msg_data.len() => Ok(()),
Ok(_) => Err(Error::Socket("Sent out truncated packet")),
Err(e) => Err(Error::SocketIo("IOError when sending", e))
}?
}
Ok(())
}
fn connect_sock(&mut self, addr: SocketAddr) -> Result<(), Error> { fn connect_sock(&mut self, addr: SocketAddr) -> Result<(), Error> {
let addr = mapped_addr(addr); let addr = mapped_addr(addr);
if self.peers.contains_key(&addr) if self.peers.contains_key(&addr)
@ -133,7 +187,7 @@ impl<S: Socket, D: Device, P: Protocol, TS: TimeSource> SocketThread<S, D, P, TS
info!("Added peer {}", addr_nice(addr)); info!("Added peer {}", addr_nice(addr));
if let Some(init) = self.pending_inits.remove(&addr) { if let Some(init) = self.pending_inits.remove(&addr) {
msg.clear(); msg.clear();
let crypto = init.finish(&mut msg); let crypto = init.finish(msg);
self.peers.insert(addr, PeerData { self.peers.insert(addr, PeerData {
addrs: info.addrs.clone(), addrs: info.addrs.clone(),
crypto, crypto,
@ -231,9 +285,7 @@ impl<S: Socket, D: Device, P: Protocol, TS: TimeSource> SocketThread<S, D, P, TS
fn handle_message(&mut self, src: SocketAddr, data: &mut MsgBuffer) -> Result<(), Error> { fn handle_message(&mut self, src: SocketAddr, data: &mut MsgBuffer) -> Result<(), Error> {
let src = mapped_addr(src); let src = mapped_addr(src);
debug!("Received {} bytes from {}", data.len(), src); debug!("Received {} bytes from {}", data.len(), src);
if let Some(result) = self.peers.get_mut(&src).map(|peer| { if let Some(result) = self.peers.get_mut(&src).map(|peer| peer.crypto.handle_message(data)) {
peer.crypto.handle_message(data)
}) {
return self.process_message(src, result?, data) return self.process_message(src, result?, data)
} }
let is_init = is_init_message(data.message()); let is_init = is_init_message(data.message());
@ -251,10 +303,8 @@ impl<S: Socket, D: Device, P: Protocol, TS: TimeSource> SocketThread<S, D, P, TS
if !data.is_empty() { if !data.is_empty() {
self.send_to(src, data)? self.send_to(src, data)?
} }
},
InitResult::Success { peer_payload, is_initiator } => {
self.add_new_peer(src, peer_payload, data)?
} }
InitResult::Success { peer_payload, .. } => self.add_new_peer(src, peer_payload, data)?
} }
return Ok(()) return Ok(())
} }
@ -266,7 +316,7 @@ impl<S: Socket, D: Device, P: Protocol, TS: TimeSource> SocketThread<S, D, P, TS
let mut init = self.crypto.peer_instance(self.create_node_info()); let mut init = self.crypto.peer_instance(self.create_node_info());
let msg_result = init.handle_init(data); let msg_result = init.handle_init(data);
match msg_result { match msg_result {
Ok(res) => { Ok(_) => {
self.pending_inits.insert(src, init); self.pending_inits.insert(src, init);
self.send_to(src, data) self.send_to(src, data)
} }
@ -278,24 +328,290 @@ impl<S: Socket, D: Device, P: Protocol, TS: TimeSource> SocketThread<S, D, P, TS
} }
fn housekeep(&mut self) -> Result<(), Error> { fn housekeep(&mut self) -> Result<(), Error> {
// self.shared.sync(); let now = TS::now();
// * = can be in different thread, ** only with caching/sync let mut buffer = MsgBuffer::new(SPACE_BEFORE);
//TODO: peers: timeout ** let mut del: SmallVec<[SocketAddr; 3]> = SmallVec::new();
//TODO: table: timeout ** for (&addr, ref data) in &self.peers {
//TODO: rotate crypto keys if data.timeout < now {
//TODO: time out pending inits del.push(addr);
//TODO: extend port forwarding * }
//TODO: reset own address ** }
//TODO: send peer lists ** for addr in del {
//TODO: reconnect to peers ** info!("Forgot peer {} due to timeout", addr_nice(addr));
//TODO: write to statsd ** self.peers.remove(&addr);
//TODO: write to stats file ** self.table.remove_claims(addr);
//TODO: read beacon ** self.connect_sock(addr)?; // Try to reconnect
//TODO: write beacon ** }
// TODO: sync self.table.housekeep();
self.crypto_housekeep()?;
// Periodically extend the port-forwarding
if let Some(ref mut pfw) = self.port_forwarding {
pfw.check_extend();
}
let now = TS::now();
// Periodically reset own peers
if self.next_own_address_reset <= now {
self.reset_own_addresses().map_err(|err| Error::SocketIo("Failed to get own addresses", err))?;
self.next_own_address_reset = now + OWN_ADDRESS_RESET_INTERVAL;
}
// Periodically send peer list to peers
if self.next_peers <= now {
debug!("Send peer list to all peers");
let info = self.create_node_info();
info.encode(&mut buffer);
self.broadcast_msg(MESSAGE_TYPE_NODE_INFO, &mut buffer)?;
// Reschedule for next update
let min_peer_timeout = self.peers.iter().map(|p| p.1.peer_timeout).min().unwrap_or(DEFAULT_PEER_TIMEOUT);
let interval = min(self.update_freq as u16, max(min_peer_timeout / 2 - 60, 1));
self.next_peers = now + Time::from(interval);
}
self.reconnect_to_peers()?;
if self.next_stats_out < now {
// Write out the statistics
self.write_out_stats().map_err(|err| Error::FileIo("Failed to write stats file", err))?;
self.send_stats_to_statsd()?;
self.next_stats_out = now + STATS_INTERVAL;
self.traffic.period(Some(5));
}
if let Some(peers) = self.beacon_serializer.get_cmd_results() {
debug!("Loaded beacon with peers: {:?}", peers);
for peer in peers {
self.connect_sock(peer)?;
}
}
if self.next_beacon < now {
self.store_beacon()?;
self.load_beacon()?;
self.next_beacon = now + Time::from(self.config.beacon_interval);
}
// TODO: sync peer_crypto
self.table.sync();
self.traffic.sync();
unimplemented!(); unimplemented!();
} }
fn crypto_housekeep(&mut self) -> Result<(), Error> {
let mut msg = MsgBuffer::new(SPACE_BEFORE);
let mut del: SmallVec<[SocketAddr; 4]> = smallvec![];
for addr in self.pending_inits.keys().copied().collect::<SmallVec<[SocketAddr; 4]>>() {
msg.clear();
if self.pending_inits.get_mut(&addr).unwrap().every_second(&mut msg).is_err() {
del.push(addr)
} else if !msg.is_empty() {
self.send_to(addr, &mut msg)?
}
}
for addr in self.peers.keys().copied().collect::<SmallVec<[SocketAddr; 16]>>() {
msg.clear();
self.peers.get_mut(&addr).unwrap().crypto.every_second(&mut msg);
if !msg.is_empty() {
self.send_to(addr, &mut msg)?
}
}
for addr in del {
self.pending_inits.remove(&addr);
if self.peers.remove(&addr).is_some() {
self.connect_sock(addr)?;
}
}
Ok(())
}
fn reset_own_addresses(&mut self) -> io::Result<()> {
self.own_addresses.clear();
self.own_addresses.push(self.socket.address().map(mapped_addr)?);
if let Some(ref pfw) = self.port_forwarding {
self.own_addresses.push(pfw.get_internal_ip().into());
self.own_addresses.push(pfw.get_external_ip().into());
}
debug!("Own addresses: {:?}", self.own_addresses);
// TODO: detect address changes and call event
Ok(())
}
/// Stores the beacon
fn store_beacon(&mut self) -> Result<(), Error> {
if let Some(ref path) = self.config.beacon_store {
let peers: SmallVec<[SocketAddr; 3]> =
self.own_addresses.choose_multiple(&mut thread_rng(), 3).cloned().collect();
if let Some(path) = path.strip_prefix('|') {
self.beacon_serializer
.write_to_cmd(&peers, path)
.map_err(|e| Error::BeaconIo("Failed to call beacon command", e))?;
} else {
self.beacon_serializer
.write_to_file(&peers, &path)
.map_err(|e| Error::BeaconIo("Failed to write beacon to file", e))?;
}
}
Ok(())
}
/// Loads the beacon
fn load_beacon(&mut self) -> Result<(), Error> {
let peers;
if let Some(ref path) = self.config.beacon_load {
if let Some(path) = path.strip_prefix('|') {
self.beacon_serializer
.read_from_cmd(path, Some(50))
.map_err(|e| Error::BeaconIo("Failed to call beacon command", e))?;
return Ok(())
} else {
peers = self
.beacon_serializer
.read_from_file(&path, Some(50))
.map_err(|e| Error::BeaconIo("Failed to read beacon from file", e))?;
}
} else {
return Ok(())
}
debug!("Loaded beacon with peers: {:?}", peers);
for peer in peers {
self.connect_sock(peer)?;
}
Ok(())
}
/// Writes out the statistics to a file
fn write_out_stats(&mut self) -> Result<(), io::Error> {
if let Some(ref mut f) = self.stats_file {
debug!("Writing out stats");
f.seek(SeekFrom::Start(0))?;
f.set_len(0)?;
writeln!(f, "peers:")?;
let now = TS::now();
for (addr, data) in &self.peers {
writeln!(
f,
" - \"{}\": {{ ttl_secs: {}, crypto: {} }}",
addr_nice(*addr),
data.timeout - now,
data.crypto.algorithm_name()
)?;
}
writeln!(f)?;
self.table.write_out(f)?;
writeln!(f)?;
self.traffic.write_out(f)?;
writeln!(f)?;
}
Ok(())
}
/// Sends the statistics to a statsd endpoint
fn send_stats_to_statsd(&mut self) -> Result<(), Error> {
if let Some(ref endpoint) = self.statsd_server {
let peer_traffic = self.traffic.total_peer_traffic();
let payload_traffic = self.traffic.total_payload_traffic();
let dropped = &self.traffic.dropped();
let prefix = self.config.statsd_prefix.as_ref().map(|s| s as &str).unwrap_or("vpncloud");
let msg = StatsdMsg::new()
.with_ns(prefix, |msg| {
msg.add("peer_count", self.peers.len(), "g");
msg.add("table_cache_entries", self.table.cache_len(), "g");
msg.add("table_claims", self.table.claim_len(), "g");
msg.with_ns("traffic", |msg| {
msg.with_ns("protocol", |msg| {
msg.with_ns("inbound", |msg| {
msg.add("bytes", peer_traffic.in_bytes, "c");
msg.add("packets", peer_traffic.in_packets, "c");
});
msg.with_ns("outbound", |msg| {
msg.add("bytes", peer_traffic.out_bytes, "c");
msg.add("packets", peer_traffic.out_packets, "c");
});
});
msg.with_ns("payload", |msg| {
msg.with_ns("inbound", |msg| {
msg.add("bytes", payload_traffic.in_bytes, "c");
msg.add("packets", payload_traffic.in_packets, "c");
});
msg.with_ns("outbound", |msg| {
msg.add("bytes", payload_traffic.out_bytes, "c");
msg.add("packets", payload_traffic.out_packets, "c");
});
});
});
msg.with_ns("invalid_protocol_traffic", |msg| {
msg.add("bytes", dropped.in_bytes, "c");
msg.add("packets", dropped.in_packets, "c");
});
msg.with_ns("dropped_payload", |msg| {
msg.add("bytes", dropped.out_bytes, "c");
msg.add("packets", dropped.out_packets, "c");
});
})
.build();
let msg_data = msg.as_bytes();
let addrs = resolve(endpoint)?;
if let Some(addr) = addrs.first() {
match self.socket.send(msg_data, *addr) {
Ok(written) if written == msg_data.len() => Ok(()),
Ok(_) => Err(Error::Socket("Sent out truncated packet")),
Err(e) => Err(Error::SocketIo("IOError when sending", e))
}?
} else {
error!("Failed to resolve statsd server {}", endpoint);
}
}
Ok(())
}
fn reconnect_to_peers(&mut self) -> Result<(), Error> {
let now = TS::now();
// Connect to those reconnect_peers that are due
for entry in self.reconnect_peers.clone() {
if entry.next > now {
continue
}
self.connect(&entry.resolved as &[SocketAddr])?;
}
for entry in &mut self.reconnect_peers {
// Schedule for next second if node is connected
for addr in &entry.resolved {
if self.peers.contains_key(&addr) {
entry.tries = 0;
entry.timeout = 1;
entry.next = now + 1;
continue
}
}
// Resolve entries anew
if let Some((ref address, ref mut next_resolve)) = entry.address {
if *next_resolve <= now {
match resolve(address as &str) {
Ok(addrs) => entry.resolved = addrs,
Err(_) => {
match resolve(&format!("{}:{}", address, DEFAULT_PORT)) {
Ok(addrs) => entry.resolved = addrs,
Err(err) => warn!("Failed to resolve {}: {}", address, err)
}
}
}
*next_resolve = now + RESOLVE_INTERVAL;
}
}
// Ignore if next attempt is already in the future
if entry.next > now {
continue
}
// Exponential back-off: every 10 tries, the interval doubles
entry.tries += 1;
if entry.tries > 10 {
entry.tries = 0;
entry.timeout *= 2;
}
// Maximum interval is one hour
if entry.timeout > MAX_RECONNECT_INTERVAL {
entry.timeout = MAX_RECONNECT_INTERVAL;
}
// Schedule next connection attempt
entry.next = now + Time::from(entry.timeout);
}
self.reconnect_peers.retain(|e| e.final_timeout.unwrap_or(now) >= now);
Ok(())
}
pub fn run(mut self) { pub fn run(mut self) {
let mut buffer = MsgBuffer::new(SPACE_BEFORE); let mut buffer = MsgBuffer::new(SPACE_BEFORE);
loop { loop {
@ -316,7 +632,7 @@ impl<S: Socket, D: Device, P: Protocol, TS: TimeSource> SocketThread<S, D, P, TS
Ok(_) => {} Ok(_) => {}
} }
let now = TS::now(); let now = TS::now();
if self.next_housekeep < TS::now() { if self.next_housekeep < now {
if let Err(e) = self.housekeep() { if let Err(e) = self.housekeep() {
error!("{}", e) error!("{}", e)
} }

2
src/traffic.rs
View File

@ -16,7 +16,7 @@ use super::{
}; };
#[derive(Default)] #[derive(Default, Clone)]
pub struct TrafficEntry { pub struct TrafficEntry {
pub out_bytes_total: u64, pub out_bytes_total: u64,
pub out_packets_total: usize, pub out_packets_total: usize,