8 use std::collections::HashMap;
9 use std::sync::{Arc, Mutex};
10 use std::sync::atomic::{Ordering, AtomicBool};
11 use std::time::{Duration, Instant};
12 use std::net::{SocketAddr, ToSocketAddrs};
14 use bitcoin_hashes::sha256d;
16 use bitcoin::blockdata::block::Block;
17 use bitcoin::blockdata::constants::genesis_block;
18 use bitcoin::network::constants::Network;
19 use bitcoin::network::message::NetworkMessage;
20 use bitcoin::network::message_blockdata::{GetHeadersMessage, Inventory, InvType};
21 use bitcoin::util::hash::BitcoinHash;
23 use printer::{Printer, Stat};
25 use datastore::{AddressState, Store, U64Setting, RegexSetting};
26 use timeout_stream::TimeoutStream;
29 use tokio::prelude::*;
30 use tokio::timer::Delay;
32 static mut REQUEST_BLOCK: Option<Box<Mutex<Arc<(u64, sha256d::Hash, Block)>>>> = None;
33 static mut HIGHEST_HEADER: Option<Box<Mutex<(sha256d::Hash, u64)>>> = None;
34 static mut HEADER_MAP: Option<Box<Mutex<HashMap<sha256d::Hash, u64>>>> = None;
35 static mut HEIGHT_MAP: Option<Box<Mutex<HashMap<u64, sha256d::Hash>>>> = None;
36 static mut DATA_STORE: Option<Box<Store>> = None;
37 static mut PRINTER: Option<Box<Printer>> = None;
38 pub static START_SHUTDOWN: AtomicBool = AtomicBool::new(false);
39 static SCANNING: AtomicBool = AtomicBool::new(false);
42 request: Arc<(u64, sha256d::Hash, Block)>,
45 fail_reason: AddressState,
54 pub fn scan_node(scan_time: Instant, node: SocketAddr, manual: bool) {
55 if START_SHUTDOWN.load(Ordering::Relaxed) { return; }
56 let printer = unsafe { PRINTER.as_ref().unwrap() };
57 let store = unsafe { DATA_STORE.as_ref().unwrap() };
59 let mut rng = rand::thread_rng();
60 let peer_state = Arc::new(Mutex::new(PeerState {
66 pong_nonce: rng.gen(),
68 fail_reason: AddressState::Timeout,
69 msg: (String::new(), false),
70 request: Arc::clone(&unsafe { REQUEST_BLOCK.as_ref().unwrap() }.lock().unwrap()),
72 let final_peer_state = Arc::clone(&peer_state);
74 let peer = Delay::new(scan_time).then(move |_| {
75 printer.set_stat(Stat::NewConnection);
76 let timeout = store.get_u64(U64Setting::RunTimeout);
77 Peer::new(node.clone(), Duration::from_secs(timeout), printer)
79 tokio::spawn(peer.and_then(move |(mut write, read)| {
80 TimeoutStream::new_timeout(read, scan_time + Duration::from_secs(store.get_u64(U64Setting::RunTimeout))).map_err(|_| { () }).for_each(move |msg| {
81 let mut state_lock = peer_state.lock().unwrap();
82 macro_rules! check_set_flag {
83 ($recvd_flag: ident, $msg: expr) => { {
84 if state_lock.$recvd_flag {
85 state_lock.fail_reason = AddressState::ProtocolViolation;
86 state_lock.msg = (format!("due to dup {}", $msg), true);
87 state_lock.$recvd_flag = false;
88 return future::err(());
90 state_lock.$recvd_flag = true;
93 state_lock.fail_reason = AddressState::TimeoutDuringRequest;
95 NetworkMessage::Version(ver) => {
96 if ver.start_height < 0 || ver.start_height as u64 > state_lock.request.0 + 1008*2 {
97 state_lock.fail_reason = AddressState::HighBlockCount;
98 return future::err(());
100 let safe_ua = ver.user_agent.replace(|c: char| !c.is_ascii() || c < ' ' || c > '~', "");
101 if (ver.start_height as u64) < state_lock.request.0 {
102 state_lock.msg = (format!("({} < {})", ver.start_height, state_lock.request.0), true);
103 state_lock.fail_reason = AddressState::LowBlockCount;
104 return future::err(());
106 let min_version = store.get_u64(U64Setting::MinProtocolVersion);
107 if (ver.version as u64) < min_version {
108 state_lock.msg = (format!("({} < {})", ver.version, min_version), true);
109 state_lock.fail_reason = AddressState::LowVersion;
110 return future::err(());
112 if ver.services & (1 | (1 << 10)) == 0 {
113 state_lock.msg = (format!("({}: services {:x})", safe_ua, ver.services), true);
114 state_lock.fail_reason = AddressState::NotFullNode;
115 return future::err(());
117 if !store.get_regex(RegexSetting::SubverRegex).is_match(&ver.user_agent) {
118 state_lock.msg = (format!("subver {}", safe_ua), true);
119 state_lock.fail_reason = AddressState::BadVersion;
120 return future::err(());
122 check_set_flag!(recvd_version, "version");
123 state_lock.node_services = ver.services;
124 state_lock.msg = (format!("(subver: {})", safe_ua), false);
125 if let Err(_) = write.try_send(NetworkMessage::Verack) {
126 return future::err(());
129 NetworkMessage::Verack => {
130 check_set_flag!(recvd_verack, "verack");
131 if let Err(_) = write.try_send(NetworkMessage::Ping(state_lock.pong_nonce)) {
132 return future::err(());
135 NetworkMessage::Ping(v) => {
136 if let Err(_) = write.try_send(NetworkMessage::Pong(v)) {
137 return future::err(())
140 NetworkMessage::Pong(v) => {
141 if v != state_lock.pong_nonce {
142 state_lock.fail_reason = AddressState::ProtocolViolation;
143 state_lock.msg = ("due to invalid pong nonce".to_string(), true);
144 return future::err(());
146 check_set_flag!(recvd_pong, "pong");
147 if let Err(_) = write.try_send(NetworkMessage::GetAddr) {
148 return future::err(());
151 NetworkMessage::Addr(addrs) => {
152 if addrs.len() > 1000 {
153 state_lock.fail_reason = AddressState::ProtocolViolation;
154 state_lock.msg = (format!("due to oversized addr: {}", addrs.len()), true);
155 state_lock.recvd_addrs = false;
156 return future::err(());
158 if addrs.len() > 10 {
159 if !state_lock.recvd_addrs {
160 if let Err(_) = write.try_send(NetworkMessage::GetData(vec![Inventory {
161 inv_type: InvType::WitnessBlock,
162 hash: state_lock.request.1,
164 return future::err(());
167 state_lock.recvd_addrs = true;
169 unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
171 NetworkMessage::Block(block) => {
172 if block != state_lock.request.2 {
173 state_lock.fail_reason = AddressState::ProtocolViolation;
174 state_lock.msg = ("due to bad block".to_string(), true);
175 return future::err(());
177 check_set_flag!(recvd_block, "block");
178 return future::err(());
180 NetworkMessage::Tx(_) => {
181 state_lock.fail_reason = AddressState::ProtocolViolation;
182 state_lock.msg = ("due to unrequested transaction".to_string(), true);
183 return future::err(());
191 }).then(move |_: Result<(), ()>| {
192 let printer = unsafe { PRINTER.as_ref().unwrap() };
193 let store = unsafe { DATA_STORE.as_ref().unwrap() };
194 printer.set_stat(Stat::ConnectionClosed);
196 let mut state_lock = final_peer_state.lock().unwrap();
197 if state_lock.recvd_version && state_lock.recvd_verack && state_lock.recvd_pong &&
198 state_lock.recvd_addrs && state_lock.recvd_block {
199 let old_state = store.set_node_state(node, AddressState::Good, state_lock.node_services);
200 if manual || (old_state != AddressState::Good && state_lock.msg.0 != "") {
201 printer.add_line(format!("Updating {} from {} to Good {}", node, old_state.to_str(), &state_lock.msg.0), state_lock.msg.1);
204 assert!(state_lock.fail_reason != AddressState::Good);
205 if state_lock.fail_reason == AddressState::TimeoutDuringRequest && state_lock.recvd_version && state_lock.recvd_verack && state_lock.recvd_pong {
206 if !state_lock.recvd_addrs {
207 state_lock.fail_reason = AddressState::TimeoutAwaitingAddr;
208 } else if !state_lock.recvd_block {
209 state_lock.fail_reason = AddressState::TimeoutAwaitingBlock;
212 let old_state = store.set_node_state(node, state_lock.fail_reason, 0);
213 if (manual || old_state != state_lock.fail_reason) && state_lock.fail_reason == AddressState::TimeoutDuringRequest {
214 printer.add_line(format!("Updating {} from {} to Timeout During Request (ver: {}, vack: {}, pong: {})",
215 node, old_state.to_str(), state_lock.recvd_version, state_lock.recvd_verack, state_lock.recvd_pong), true);
216 } else if manual || (old_state != state_lock.fail_reason && state_lock.msg.0 != "" && state_lock.msg.1) {
217 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);
225 tokio::spawn(future::lazy(|| {
226 let printer = unsafe { PRINTER.as_ref().unwrap() };
227 let store = unsafe { DATA_STORE.as_ref().unwrap() };
229 let mut new_addrs = 0;
230 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() {
231 new_addrs += store.add_fresh_addrs((*seed, 8333u16).to_socket_addrs().unwrap_or(Vec::new().into_iter()));
232 new_addrs += store.add_fresh_addrs((("x9.".to_string() + seed).as_str(), 8333u16).to_socket_addrs().unwrap_or(Vec::new().into_iter()));
234 printer.add_line(format!("Added {} new addresses from other DNS seeds", new_addrs), false);
235 Delay::new(Instant::now() + Duration::from_secs(60)).then(|_| {
236 let store = unsafe { DATA_STORE.as_ref().unwrap() };
237 store.save_data().then(|_| {
238 if !START_SHUTDOWN.load(Ordering::Relaxed) {
248 tokio::spawn(future::lazy(|| {
249 let printer = unsafe { PRINTER.as_ref().unwrap() };
250 let store = unsafe { DATA_STORE.as_ref().unwrap() };
252 let mut scan_nodes = store.get_next_scan_nodes();
253 printer.add_line(format!("Got {} addresses to scan", scan_nodes.len()), false);
254 let per_iter_time = Duration::from_millis(1000 / store.get_u64(U64Setting::ConnsPerSec));
255 let start_time = Instant::now();
256 let mut iter_time = start_time;
258 for node in scan_nodes.drain(..) {
259 scan_node(iter_time, node, false);
260 iter_time += per_iter_time;
262 Delay::new(cmp::max(iter_time, start_time + Duration::from_secs(1))).then(|_| {
263 if !START_SHUTDOWN.load(Ordering::Relaxed) {
271 fn make_trusted_conn(trusted_sockaddr: SocketAddr) {
272 let printer = unsafe { PRINTER.as_ref().unwrap() };
273 let trusted_peer = Peer::new(trusted_sockaddr.clone(), Duration::from_secs(600), printer);
274 tokio::spawn(trusted_peer.and_then(move |(mut trusted_write, trusted_read)| {
275 printer.add_line("Connected to local peer".to_string(), false);
276 let mut starting_height = 0;
277 TimeoutStream::new_persistent(trusted_read, Duration::from_secs(600)).map_err(|_| { () }).for_each(move |msg| {
278 if START_SHUTDOWN.load(Ordering::Relaxed) {
279 return future::err(());
282 NetworkMessage::Version(ver) => {
283 if let Err(_) = trusted_write.try_send(NetworkMessage::Verack) {
284 return future::err(())
286 starting_height = ver.start_height;
288 NetworkMessage::Verack => {
289 if let Err(_) = trusted_write.try_send(NetworkMessage::SendHeaders) {
290 return future::err(());
292 if let Err(_) = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
294 locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
295 stop_hash: Default::default(),
297 return future::err(());
299 if let Err(_) = trusted_write.try_send(NetworkMessage::GetAddr) {
300 return future::err(());
303 NetworkMessage::Addr(addrs) => {
304 unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
306 NetworkMessage::Headers(headers) => {
307 if headers.is_empty() {
308 return future::ok(());
310 let mut header_map = unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap();
311 let mut height_map = unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap();
313 if let Some(height) = header_map.get(&headers[0].prev_blockhash).cloned() {
314 for i in 0..headers.len() {
315 let hash = headers[i].bitcoin_hash();
316 if i < headers.len() - 1 && headers[i + 1].prev_blockhash != hash {
317 return future::err(());
319 header_map.insert(headers[i].bitcoin_hash(), height + 1 + (i as u64));
320 height_map.insert(height + 1 + (i as u64), headers[i].bitcoin_hash());
323 let top_height = height + headers.len() as u64;
324 *unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap()
325 = (headers.last().unwrap().bitcoin_hash(), top_height);
326 printer.set_stat(printer::Stat::HeaderCount(top_height));
328 if top_height >= starting_height as u64 {
329 if let Err(_) = trusted_write.try_send(NetworkMessage::GetData(vec![Inventory {
330 inv_type: InvType::WitnessBlock,
331 hash: height_map.get(&(top_height - 216)).unwrap().clone(),
333 return future::err(());
337 // Wat? Lets start again...
338 printer.add_line("Got unconnected headers message from local trusted peer".to_string(), true);
340 if let Err(_) = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
342 locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
343 stop_hash: Default::default(),
345 return future::err(())
348 NetworkMessage::Block(block) => {
349 let hash = block.header.bitcoin_hash();
350 let header_map = unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap();
351 let height = *header_map.get(&hash).expect("Got loose block from trusted peer we coulnd't have requested");
352 if height == unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().1 - 216 {
353 *unsafe { REQUEST_BLOCK.as_ref().unwrap() }.lock().unwrap() = Arc::new((height, hash, block));
354 if !SCANNING.swap(true, Ordering::SeqCst) {
360 NetworkMessage::Ping(v) => {
361 if let Err(_) = trusted_write.try_send(NetworkMessage::Pong(v)) {
362 return future::err(())
371 }).then(move |_: Result<(), ()>| {
372 if !START_SHUTDOWN.load(Ordering::Relaxed) {
373 printer.add_line("Lost connection from trusted peer".to_string(), true);
374 make_trusted_conn(trusted_sockaddr);
381 if env::args().len() != 3 {
382 println!("USAGE: dnsseed-rust datastore localPeerAddress");
386 unsafe { HEADER_MAP = Some(Box::new(Mutex::new(HashMap::with_capacity(600000)))) };
387 unsafe { HEIGHT_MAP = Some(Box::new(Mutex::new(HashMap::with_capacity(600000)))) };
388 unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap().insert(genesis_block(Network::Bitcoin).bitcoin_hash(), 0);
389 unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap().insert(0, genesis_block(Network::Bitcoin).bitcoin_hash());
390 unsafe { HIGHEST_HEADER = Some(Box::new(Mutex::new((genesis_block(Network::Bitcoin).bitcoin_hash(), 0)))) };
391 unsafe { REQUEST_BLOCK = Some(Box::new(Mutex::new(Arc::new((0, genesis_block(Network::Bitcoin).bitcoin_hash(), genesis_block(Network::Bitcoin)))))) };
393 let trt = tokio::runtime::Builder::new()
394 .blocking_threads(2).core_threads(num_cpus::get().max(1) * 3)
397 let _ = trt.block_on_all(future::lazy(|| {
398 let mut args = env::args();
400 let path = args.next().unwrap();
401 let addr = args.next().unwrap();
403 Store::new(path).and_then(move |store| {
404 unsafe { DATA_STORE = Some(Box::new(store)) };
405 let store = unsafe { DATA_STORE.as_ref().unwrap() };
406 unsafe { PRINTER = Some(Box::new(Printer::new(store))) };
408 let trusted_sockaddr: SocketAddr = addr.parse().unwrap();
409 make_trusted_conn(trusted_sockaddr);
411 reader::read(store, unsafe { PRINTER.as_ref().unwrap() });
419 tokio::run(future::lazy(|| {
420 unsafe { DATA_STORE.as_ref().unwrap() }.save_data()