9 use std::collections::HashMap;
10 use std::sync::{Arc, Mutex};
11 use std::sync::atomic::{Ordering, AtomicBool};
12 use std::time::{Duration, Instant};
13 use std::net::{SocketAddr, ToSocketAddrs};
15 use bitcoin_hashes::sha256d;
17 use bitcoin::blockdata::block::Block;
18 use bitcoin::blockdata::constants::genesis_block;
19 use bitcoin::network::constants::Network;
20 use bitcoin::network::message::NetworkMessage;
21 use bitcoin::network::message_blockdata::{GetHeadersMessage, Inventory, InvType};
22 use bitcoin::util::hash::BitcoinHash;
24 use printer::{Printer, Stat};
26 use datastore::{AddressState, Store, U64Setting, RegexSetting};
27 use timeout_stream::TimeoutStream;
29 use bgp_client::BGPClient;
31 use tokio::prelude::*;
32 use tokio::timer::Delay;
34 static mut REQUEST_BLOCK: Option<Box<Mutex<Arc<(u64, sha256d::Hash, Block)>>>> = None;
35 static mut HIGHEST_HEADER: Option<Box<Mutex<(sha256d::Hash, u64)>>> = None;
36 static mut HEADER_MAP: Option<Box<Mutex<HashMap<sha256d::Hash, u64>>>> = None;
37 static mut HEIGHT_MAP: Option<Box<Mutex<HashMap<u64, sha256d::Hash>>>> = None;
38 static mut DATA_STORE: Option<Box<Store>> = None;
39 static mut PRINTER: Option<Box<Printer>> = None;
40 static mut TOR_PROXY: Option<SocketAddr> = None;
41 pub static START_SHUTDOWN: AtomicBool = AtomicBool::new(false);
42 static SCANNING: AtomicBool = AtomicBool::new(false);
45 request: Arc<(u64, sha256d::Hash, Block)>,
48 fail_reason: AddressState,
57 pub fn scan_node(scan_time: Instant, node: SocketAddr, manual: bool) {
58 if START_SHUTDOWN.load(Ordering::Relaxed) { return; }
59 let printer = unsafe { PRINTER.as_ref().unwrap() };
60 let store = unsafe { DATA_STORE.as_ref().unwrap() };
62 let mut rng = rand::thread_rng();
63 let peer_state = Arc::new(Mutex::new(PeerState {
69 pong_nonce: rng.gen(),
71 fail_reason: AddressState::Timeout,
72 msg: (String::new(), false),
73 request: Arc::clone(&unsafe { REQUEST_BLOCK.as_ref().unwrap() }.lock().unwrap()),
75 let err_peer_state = Arc::clone(&peer_state);
76 let final_peer_state = Arc::clone(&peer_state);
78 let peer = Delay::new(scan_time).then(move |_| {
79 printer.set_stat(Stat::NewConnection);
80 let timeout = store.get_u64(U64Setting::RunTimeout);
81 Peer::new(node.clone(), unsafe { TOR_PROXY.as_ref().unwrap() }, Duration::from_secs(timeout), printer)
83 tokio::spawn(peer.and_then(move |(mut write, read)| {
84 TimeoutStream::new_timeout(read, scan_time + Duration::from_secs(store.get_u64(U64Setting::RunTimeout))).map_err(move |err| {
86 bitcoin::consensus::encode::Error::UnrecognizedNetworkCommand(ref msg) => {
87 // If we got here, we hit one of the explicitly disallowed messages indicating
89 let mut state_lock = err_peer_state.lock().unwrap();
90 state_lock.msg = (format!("(bad msg type {})", msg), true);
91 state_lock.fail_reason = AddressState::EvilNode;
96 }).for_each(move |msg| {
97 let mut state_lock = peer_state.lock().unwrap();
98 macro_rules! check_set_flag {
99 ($recvd_flag: ident, $msg: expr) => { {
100 if state_lock.$recvd_flag {
101 state_lock.fail_reason = AddressState::ProtocolViolation;
102 state_lock.msg = (format!("due to dup {}", $msg), true);
103 state_lock.$recvd_flag = false;
104 return future::err(());
106 state_lock.$recvd_flag = true;
109 state_lock.fail_reason = AddressState::TimeoutDuringRequest;
111 Some(NetworkMessage::Version(ver)) => {
112 if ver.start_height < 0 || ver.start_height as u64 > state_lock.request.0 + 1008*2 {
113 state_lock.fail_reason = AddressState::HighBlockCount;
114 return future::err(());
116 let safe_ua = ver.user_agent.replace(|c: char| !c.is_ascii() || c < ' ' || c > '~', "");
117 if (ver.start_height as u64) < state_lock.request.0 {
118 state_lock.msg = (format!("({} < {})", ver.start_height, state_lock.request.0), true);
119 state_lock.fail_reason = AddressState::LowBlockCount;
120 return future::err(());
122 let min_version = store.get_u64(U64Setting::MinProtocolVersion);
123 if (ver.version as u64) < min_version {
124 state_lock.msg = (format!("({} < {})", ver.version, min_version), true);
125 state_lock.fail_reason = AddressState::LowVersion;
126 return future::err(());
128 if ver.services & (1 | (1 << 10)) == 0 {
129 state_lock.msg = (format!("({}: services {:x})", safe_ua, ver.services), true);
130 state_lock.fail_reason = AddressState::NotFullNode;
131 return future::err(());
133 if !store.get_regex(RegexSetting::SubverRegex).is_match(&ver.user_agent) {
134 state_lock.msg = (format!("subver {}", safe_ua), true);
135 state_lock.fail_reason = AddressState::BadVersion;
136 return future::err(());
138 check_set_flag!(recvd_version, "version");
139 state_lock.node_services = ver.services;
140 state_lock.msg = (format!("(subver: {})", safe_ua), false);
141 if let Err(_) = write.try_send(NetworkMessage::Verack) {
142 return future::err(());
145 Some(NetworkMessage::Verack) => {
146 check_set_flag!(recvd_verack, "verack");
147 if let Err(_) = write.try_send(NetworkMessage::Ping(state_lock.pong_nonce)) {
148 return future::err(());
151 Some(NetworkMessage::Ping(v)) => {
152 if let Err(_) = write.try_send(NetworkMessage::Pong(v)) {
153 return future::err(())
156 Some(NetworkMessage::Pong(v)) => {
157 if v != state_lock.pong_nonce {
158 state_lock.fail_reason = AddressState::ProtocolViolation;
159 state_lock.msg = ("due to invalid pong nonce".to_string(), true);
160 return future::err(());
162 check_set_flag!(recvd_pong, "pong");
163 if let Err(_) = write.try_send(NetworkMessage::GetAddr) {
164 return future::err(());
167 Some(NetworkMessage::Addr(addrs)) => {
168 if addrs.len() > 1000 {
169 state_lock.fail_reason = AddressState::ProtocolViolation;
170 state_lock.msg = (format!("due to oversized addr: {}", addrs.len()), true);
171 state_lock.recvd_addrs = false;
172 return future::err(());
174 if addrs.len() > 10 {
175 if !state_lock.recvd_addrs {
176 if let Err(_) = write.try_send(NetworkMessage::GetData(vec![Inventory {
177 inv_type: InvType::WitnessBlock,
178 hash: state_lock.request.1,
180 return future::err(());
183 state_lock.recvd_addrs = true;
185 unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
187 Some(NetworkMessage::Block(block)) => {
188 if block != state_lock.request.2 {
189 state_lock.fail_reason = AddressState::ProtocolViolation;
190 state_lock.msg = ("due to bad block".to_string(), true);
191 return future::err(());
193 check_set_flag!(recvd_block, "block");
194 return future::err(());
196 Some(NetworkMessage::Inv(invs)) => {
198 if inv.inv_type == InvType::Transaction {
199 state_lock.fail_reason = AddressState::EvilNode;
200 state_lock.msg = ("due to unrequested inv tx".to_string(), true);
201 return future::err(());
205 Some(NetworkMessage::Tx(_)) => {
206 state_lock.fail_reason = AddressState::EvilNode;
207 state_lock.msg = ("due to unrequested transaction".to_string(), true);
208 return future::err(());
216 }).then(move |_: Result<(), ()>| {
217 let printer = unsafe { PRINTER.as_ref().unwrap() };
218 let store = unsafe { DATA_STORE.as_ref().unwrap() };
219 printer.set_stat(Stat::ConnectionClosed);
221 let mut state_lock = final_peer_state.lock().unwrap();
222 if state_lock.recvd_version && state_lock.recvd_verack && state_lock.recvd_pong &&
223 state_lock.recvd_addrs && state_lock.recvd_block {
224 let old_state = store.set_node_state(node, AddressState::Good, state_lock.node_services);
225 if manual || (old_state != AddressState::Good && state_lock.msg.0 != "") {
226 printer.add_line(format!("Updating {} from {} to Good {}", node, old_state.to_str(), &state_lock.msg.0), state_lock.msg.1);
229 assert!(state_lock.fail_reason != AddressState::Good);
230 if state_lock.fail_reason == AddressState::TimeoutDuringRequest && state_lock.recvd_version && state_lock.recvd_verack {
231 if !state_lock.recvd_pong {
232 state_lock.fail_reason = AddressState::TimeoutAwaitingPong;
233 } else if !state_lock.recvd_addrs {
234 state_lock.fail_reason = AddressState::TimeoutAwaitingAddr;
235 } else if !state_lock.recvd_block {
236 state_lock.fail_reason = AddressState::TimeoutAwaitingBlock;
239 let old_state = store.set_node_state(node, state_lock.fail_reason, 0);
240 if (manual || old_state != state_lock.fail_reason) && state_lock.fail_reason == AddressState::TimeoutDuringRequest {
241 printer.add_line(format!("Updating {} from {} to Timeout During Request (ver: {}, vack: {})",
242 node, old_state.to_str(), state_lock.recvd_version, state_lock.recvd_verack), true);
243 } else if manual || (old_state != state_lock.fail_reason && state_lock.msg.0 != "" && state_lock.msg.1) {
244 printer.add_line(format!("Updating {} from {} to {} {}", node, old_state.to_str(), state_lock.fail_reason.to_str(), &state_lock.msg.0), state_lock.msg.1);
251 fn poll_dnsseeds(bgp_client: Arc<BGPClient>) {
252 tokio::spawn(future::lazy(|| {
253 let printer = unsafe { PRINTER.as_ref().unwrap() };
254 let store = unsafe { DATA_STORE.as_ref().unwrap() };
256 let mut new_addrs = 0;
257 for seed in ["seed.bitcoin.sipa.be", "dnsseed.bitcoin.dashjr.org", "seed.bitcoinstats.com", "seed.bitcoin.jonasschnelli.ch", "seed.btc.petertodd.org", "seed.bitcoin.sprovoost.nl", "dnsseed.emzy.de"].iter() {
258 new_addrs += store.add_fresh_addrs((*seed, 8333u16).to_socket_addrs().unwrap_or(Vec::new().into_iter()));
259 new_addrs += store.add_fresh_addrs((("x9.".to_string() + seed).as_str(), 8333u16).to_socket_addrs().unwrap_or(Vec::new().into_iter()));
261 printer.add_line(format!("Added {} new addresses from other DNS seeds", new_addrs), false);
262 Delay::new(Instant::now() + Duration::from_secs(60)).then(|_| {
263 let store = unsafe { DATA_STORE.as_ref().unwrap() };
264 let dns_future = store.write_dns(Arc::clone(&bgp_client));
265 store.save_data().join(dns_future).then(|_| {
266 if !START_SHUTDOWN.load(Ordering::Relaxed) {
267 poll_dnsseeds(bgp_client);
269 bgp_client.disconnect();
278 tokio::spawn(future::lazy(|| {
279 let printer = unsafe { PRINTER.as_ref().unwrap() };
280 let store = unsafe { DATA_STORE.as_ref().unwrap() };
282 let mut scan_nodes = store.get_next_scan_nodes();
283 printer.add_line(format!("Got {} addresses to scan", scan_nodes.len()), false);
284 let per_iter_time = Duration::from_millis(1000 / store.get_u64(U64Setting::ConnsPerSec));
285 let start_time = Instant::now();
286 let mut iter_time = start_time;
288 for node in scan_nodes.drain(..) {
289 scan_node(iter_time, node, false);
290 iter_time += per_iter_time;
292 Delay::new(cmp::max(iter_time, start_time + Duration::from_secs(1))).then(move |_| {
293 if !START_SHUTDOWN.load(Ordering::Relaxed) {
301 fn make_trusted_conn(trusted_sockaddr: SocketAddr, bgp_client: Arc<BGPClient>) {
302 let printer = unsafe { PRINTER.as_ref().unwrap() };
303 let trusted_peer = Peer::new(trusted_sockaddr.clone(), unsafe { TOR_PROXY.as_ref().unwrap() }, Duration::from_secs(600), printer);
304 let bgp_reload = Arc::clone(&bgp_client);
305 tokio::spawn(trusted_peer.and_then(move |(mut trusted_write, trusted_read)| {
306 printer.add_line("Connected to local peer".to_string(), false);
307 let mut starting_height = 0;
308 TimeoutStream::new_persistent(trusted_read, Duration::from_secs(600)).map_err(|_| { () }).for_each(move |msg| {
309 if START_SHUTDOWN.load(Ordering::Relaxed) {
310 return future::err(());
313 Some(NetworkMessage::Version(ver)) => {
314 if let Err(_) = trusted_write.try_send(NetworkMessage::Verack) {
315 return future::err(())
317 starting_height = ver.start_height;
319 Some(NetworkMessage::Verack) => {
320 if let Err(_) = trusted_write.try_send(NetworkMessage::SendHeaders) {
321 return future::err(());
323 if let Err(_) = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
325 locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
326 stop_hash: Default::default(),
328 return future::err(());
330 if let Err(_) = trusted_write.try_send(NetworkMessage::GetAddr) {
331 return future::err(());
334 Some(NetworkMessage::Addr(addrs)) => {
335 unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
337 Some(NetworkMessage::Headers(headers)) => {
338 if headers.is_empty() {
339 return future::ok(());
341 let mut header_map = unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap();
342 let mut height_map = unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap();
344 if let Some(height) = header_map.get(&headers[0].prev_blockhash).cloned() {
345 for i in 0..headers.len() {
346 let hash = headers[i].bitcoin_hash();
347 if i < headers.len() - 1 && headers[i + 1].prev_blockhash != hash {
348 return future::err(());
350 header_map.insert(headers[i].bitcoin_hash(), height + 1 + (i as u64));
351 height_map.insert(height + 1 + (i as u64), headers[i].bitcoin_hash());
354 let top_height = height + headers.len() as u64;
355 *unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap()
356 = (headers.last().unwrap().bitcoin_hash(), top_height);
357 printer.set_stat(printer::Stat::HeaderCount(top_height));
359 if top_height >= starting_height as u64 {
360 if let Err(_) = trusted_write.try_send(NetworkMessage::GetData(vec![Inventory {
361 inv_type: InvType::WitnessBlock,
362 hash: height_map.get(&(top_height - 216)).unwrap().clone(),
364 return future::err(());
368 // Wat? Lets start again...
369 printer.add_line("Got unconnected headers message from local trusted peer".to_string(), true);
371 if let Err(_) = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
373 locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
374 stop_hash: Default::default(),
376 return future::err(())
379 Some(NetworkMessage::Block(block)) => {
380 let hash = block.header.bitcoin_hash();
381 let header_map = unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap();
382 let height = *header_map.get(&hash).expect("Got loose block from trusted peer we coulnd't have requested");
383 if height == unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().1 - 216 {
384 *unsafe { REQUEST_BLOCK.as_ref().unwrap() }.lock().unwrap() = Arc::new((height, hash, block));
385 if !SCANNING.swap(true, Ordering::SeqCst) {
387 poll_dnsseeds(Arc::clone(&bgp_client));
391 Some(NetworkMessage::Ping(v)) => {
392 if let Err(_) = trusted_write.try_send(NetworkMessage::Pong(v)) {
393 return future::err(())
402 }).then(move |_: Result<(), ()>| {
403 if !START_SHUTDOWN.load(Ordering::Relaxed) {
404 printer.add_line("Lost connection from trusted peer".to_string(), true);
405 make_trusted_conn(trusted_sockaddr, bgp_reload);
412 if env::args().len() != 5 {
413 println!("USAGE: dnsseed-rust datastore localPeerAddress tor_proxy_addr bgp_peer");
417 unsafe { HEADER_MAP = Some(Box::new(Mutex::new(HashMap::with_capacity(600000)))) };
418 unsafe { HEIGHT_MAP = Some(Box::new(Mutex::new(HashMap::with_capacity(600000)))) };
419 unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap().insert(genesis_block(Network::Bitcoin).bitcoin_hash(), 0);
420 unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap().insert(0, genesis_block(Network::Bitcoin).bitcoin_hash());
421 unsafe { HIGHEST_HEADER = Some(Box::new(Mutex::new((genesis_block(Network::Bitcoin).bitcoin_hash(), 0)))) };
422 unsafe { REQUEST_BLOCK = Some(Box::new(Mutex::new(Arc::new((0, genesis_block(Network::Bitcoin).bitcoin_hash(), genesis_block(Network::Bitcoin)))))) };
424 let trt = tokio::runtime::Builder::new()
425 .blocking_threads(2).core_threads(num_cpus::get().max(1) * 3)
428 let _ = trt.block_on_all(future::lazy(|| {
429 let mut args = env::args();
431 let path = args.next().unwrap();
432 let trusted_sockaddr: SocketAddr = args.next().unwrap().parse().unwrap();
434 let tor_socks5_sockaddr: SocketAddr = args.next().unwrap().parse().unwrap();
435 unsafe { TOR_PROXY = Some(tor_socks5_sockaddr); }
437 let bgp_sockaddr: SocketAddr = args.next().unwrap().parse().unwrap();
439 Store::new(path).and_then(move |store| {
440 unsafe { DATA_STORE = Some(Box::new(store)) };
441 let store = unsafe { DATA_STORE.as_ref().unwrap() };
442 unsafe { PRINTER = Some(Box::new(Printer::new(store))) };
444 let bgp_client = BGPClient::new(bgp_sockaddr, Duration::from_secs(60), unsafe { PRINTER.as_ref().unwrap() });
445 make_trusted_conn(trusted_sockaddr, Arc::clone(&bgp_client));
447 reader::read(store, unsafe { PRINTER.as_ref().unwrap() }, bgp_client);
455 tokio::run(future::lazy(|| {
456 unsafe { DATA_STORE.as_ref().unwrap() }.save_data()