_ Git - dnsseed-rust/blob - src/main.rs

   1 mod printer;
   2 mod reader;
   3 mod peer;
   4 mod bgp_client;
   5 mod timeout_stream;
   6 mod datastore;
   7
   8 use std::env;
   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};
  14
  15 use bitcoin_hashes::sha256d;
  16
  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;
  23
  24 use printer::{Printer, Stat};
  25 use peer::Peer;
  26 use datastore::{AddressState, Store, U64Setting, RegexSetting};
  27 use timeout_stream::TimeoutStream;
  28 use rand::Rng;
  29 use bgp_client::BGPClient;
  30
  31 use tokio::prelude::*;
  32 use tokio::timer::Delay;
  33
  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);
  43
  44 struct PeerState {
  45         request: Arc<(u64, sha256d::Hash, Block)>,
  46         node_services: u64,
  47         msg: (String, bool),
  48         fail_reason: AddressState,
  49         recvd_version: bool,
  50         recvd_verack: bool,
  51         recvd_pong: bool,
  52         recvd_addrs: bool,
  53         recvd_block: bool,
  54         pong_nonce: u64,
  55 }
  56
  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() };
  61
  62         let mut rng = rand::thread_rng();
  63         let peer_state = Arc::new(Mutex::new(PeerState {
  64                 recvd_version: false,
  65                 recvd_verack: false,
  66                 recvd_pong: false,
  67                 recvd_addrs: false,
  68                 recvd_block: false,
  69                 pong_nonce: rng.gen(),
  70                 node_services: 0,
  71                 fail_reason: AddressState::Timeout,
  72                 msg: (String::new(), false),
  73                 request: Arc::clone(&unsafe { REQUEST_BLOCK.as_ref().unwrap() }.lock().unwrap()),
  74         }));
  75         let err_peer_state = Arc::clone(&peer_state);
  76         let final_peer_state = Arc::clone(&peer_state);
  77
  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)
  82         });
  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| {
  85                         match err {
  86                                 bitcoin::consensus::encode::Error::UnrecognizedNetworkCommand(ref msg) => {
  87                                         // If we got here, we hit one of the explicitly disallowed messages indicating
  88                                         // a bogus "node".
  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;
  92                                 },
  93                                 _ => {},
  94                         }
  95                         ()
  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(());
 105                                         }
 106                                         state_lock.$recvd_flag = true;
 107                                 } }
 108                         }
 109                         state_lock.fail_reason = AddressState::TimeoutDuringRequest;
 110                         match msg {
 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(());
 115                                         }
 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(());
 121                                         }
 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(());
 127                                         }
 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(());
 132                                         }
 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(());
 137                                         }
 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(());
 143                                         }
 144                                 },
 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(());
 149                                         }
 150                                 },
 151                                 Some(NetworkMessage::Ping(v)) => {
 152                                         if let Err(_) = write.try_send(NetworkMessage::Pong(v)) {
 153                                                 return future::err(())
 154                                         }
 155                                 },
 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(());
 161                                         }
 162                                         check_set_flag!(recvd_pong, "pong");
 163                                         if let Err(_) = write.try_send(NetworkMessage::GetAddr) {
 164                                                 return future::err(());
 165                                         }
 166                                 },
 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(());
 173                                         }
 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,
 179                                                         }])) {
 180                                                                 return future::err(());
 181                                                         }
 182                                                 }
 183                                                 state_lock.recvd_addrs = true;
 184                                         }
 185                                         unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
 186                                 },
 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(());
 192                                         }
 193                                         check_set_flag!(recvd_block, "block");
 194                                         return future::err(());
 195                                 },
 196                                 Some(NetworkMessage::Inv(invs)) => {
 197                                         for inv in 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(());
 202                                                 }
 203                                         }
 204                                 },
 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(());
 209                                 },
 210                                 _ => {},
 211                         }
 212                         future::ok(())
 213                 }).then(|_| {
 214                         future::err(())
 215                 })
 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);
 220
 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);
 227                         }
 228                 } else {
 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;
 237                                 }
 238                         }
 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);
 245                         }
 246                 }
 247                 future::ok(())
 248         }));
 249 }
 250
 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() };
 255
 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()));
 260                 }
 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);
 268                                 } else {
 269                                         bgp_client.disconnect();
 270                                 }
 271                                 future::ok(())
 272                         })
 273                 })
 274         }));
 275 }
 276
 277 fn scan_net() {
 278         tokio::spawn(future::lazy(|| {
 279                 let printer = unsafe { PRINTER.as_ref().unwrap() };
 280                 let store = unsafe { DATA_STORE.as_ref().unwrap() };
 281
 282                 let start_time = Instant::now();
 283                 let mut scan_nodes = store.get_next_scan_nodes();
 284                 printer.add_line(format!("Got {} addresses to scan", scan_nodes.len()), false);
 285                 if !scan_nodes.is_empty() {
 286                         let per_iter_time = Duration::from_millis(datastore::SECS_PER_SCAN_RESULTS * 1000 / scan_nodes.len() as u64);
 287                         let mut iter_time = start_time;
 288
 289                         for node in scan_nodes.drain(..) {
 290                                 scan_node(iter_time, node, false);
 291                                 iter_time += per_iter_time;
 292                         }
 293                 }
 294                 Delay::new(start_time + Duration::from_secs(datastore::SECS_PER_SCAN_RESULTS)).then(move |_| {
 295                         if !START_SHUTDOWN.load(Ordering::Relaxed) {
 296                                 scan_net();
 297                         }
 298                         future::ok(())
 299                 })
 300         }));
 301 }
 302
 303 fn make_trusted_conn(trusted_sockaddr: SocketAddr, bgp_client: Arc<BGPClient>) {
 304         let printer = unsafe { PRINTER.as_ref().unwrap() };
 305         let trusted_peer = Peer::new(trusted_sockaddr.clone(), unsafe { TOR_PROXY.as_ref().unwrap() }, Duration::from_secs(600), printer);
 306         let bgp_reload = Arc::clone(&bgp_client);
 307         tokio::spawn(trusted_peer.and_then(move |(mut trusted_write, trusted_read)| {
 308                 printer.add_line("Connected to local peer".to_string(), false);
 309                 let mut starting_height = 0;
 310                 TimeoutStream::new_persistent(trusted_read, Duration::from_secs(600)).map_err(|_| { () }).for_each(move |msg| {
 311                         if START_SHUTDOWN.load(Ordering::Relaxed) {
 312                                 return future::err(());
 313                         }
 314                         match msg {
 315                                 Some(NetworkMessage::Version(ver)) => {
 316                                         if let Err(_) = trusted_write.try_send(NetworkMessage::Verack) {
 317                                                 return future::err(())
 318                                         }
 319                                         starting_height = ver.start_height;
 320                                 },
 321                                 Some(NetworkMessage::Verack) => {
 322                                         if let Err(_) = trusted_write.try_send(NetworkMessage::SendHeaders) {
 323                                                 return future::err(());
 324                                         }
 325                                         if let Err(_) = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
 326                                                 version: 70015,
 327                                                 locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
 328                                                 stop_hash: Default::default(),
 329                                         })) {
 330                                                 return future::err(());
 331                                         }
 332                                         if let Err(_) = trusted_write.try_send(NetworkMessage::GetAddr) {
 333                                                 return future::err(());
 334                                         }
 335                                 },
 336                                 Some(NetworkMessage::Addr(addrs)) => {
 337                                         unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
 338                                 },
 339                                 Some(NetworkMessage::Headers(headers)) => {
 340                                         if headers.is_empty() {
 341                                                 return future::ok(());
 342                                         }
 343                                         let mut header_map = unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap();
 344                                         let mut height_map = unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap();
 345
 346                                         if let Some(height) = header_map.get(&headers[0].prev_blockhash).cloned() {
 347                                                 for i in 0..headers.len() {
 348                                                         let hash = headers[i].bitcoin_hash();
 349                                                         if i < headers.len() - 1 && headers[i + 1].prev_blockhash != hash {
 350                                                                 return future::err(());
 351                                                         }
 352                                                         header_map.insert(headers[i].bitcoin_hash(), height + 1 + (i as u64));
 353                                                         height_map.insert(height + 1 + (i as u64), headers[i].bitcoin_hash());
 354                                                 }
 355
 356                                                 let top_height = height + headers.len() as u64;
 357                                                 *unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap()
 358                                                         = (headers.last().unwrap().bitcoin_hash(), top_height);
 359                                                 printer.set_stat(printer::Stat::HeaderCount(top_height));
 360
 361                                                 if top_height >= starting_height as u64 {
 362                                                         if let Err(_) = trusted_write.try_send(NetworkMessage::GetData(vec![Inventory {
 363                                                                 inv_type: InvType::WitnessBlock,
 364                                                                 hash: height_map.get(&(top_height - 216)).unwrap().clone(),
 365                                                         }])) {
 366                                                                 return future::err(());
 367                                                         }
 368                                                 }
 369                                         } else {
 370                                                 // Wat? Lets start again...
 371                                                 printer.add_line("Got unconnected headers message from local trusted peer".to_string(), true);
 372                                         }
 373                                         if let Err(_) = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
 374                                                 version: 70015,
 375                                                 locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
 376                                                 stop_hash: Default::default(),
 377                                         })) {
 378                                                 return future::err(())
 379                                         }
 380                                 },
 381                                 Some(NetworkMessage::Block(block)) => {
 382                                         let hash = block.header.bitcoin_hash();
 383                                         let header_map = unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap();
 384                                         let height = *header_map.get(&hash).expect("Got loose block from trusted peer we coulnd't have requested");
 385                                         if height == unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().1 - 216 {
 386                                                 *unsafe { REQUEST_BLOCK.as_ref().unwrap() }.lock().unwrap() = Arc::new((height, hash, block));
 387                                                 if !SCANNING.swap(true, Ordering::SeqCst) {
 388                                                         scan_net();
 389                                                         poll_dnsseeds(Arc::clone(&bgp_client));
 390                                                 }
 391                                         }
 392                                 },
 393                                 Some(NetworkMessage::Ping(v)) => {
 394                                         if let Err(_) = trusted_write.try_send(NetworkMessage::Pong(v)) {
 395                                                 return future::err(())
 396                                         }
 397                                 },
 398                                 _ => {},
 399                         }
 400                         future::ok(())
 401                 }).then(|_| {
 402                         future::err(())
 403                 })
 404         }).then(move |_: Result<(), ()>| {
 405                 if !START_SHUTDOWN.load(Ordering::Relaxed) {
 406                         printer.add_line("Lost connection from trusted peer".to_string(), true);
 407                         make_trusted_conn(trusted_sockaddr, bgp_reload);
 408                 }
 409                 future::ok(())
 410         }));
 411 }
 412
 413 fn main() {
 414         if env::args().len() != 5 {
 415                 println!("USAGE: dnsseed-rust datastore localPeerAddress tor_proxy_addr bgp_peer");
 416                 return;
 417         }
 418
 419         unsafe { HEADER_MAP = Some(Box::new(Mutex::new(HashMap::with_capacity(600000)))) };
 420         unsafe { HEIGHT_MAP = Some(Box::new(Mutex::new(HashMap::with_capacity(600000)))) };
 421         unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap().insert(genesis_block(Network::Bitcoin).bitcoin_hash(), 0);
 422         unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap().insert(0, genesis_block(Network::Bitcoin).bitcoin_hash());
 423         unsafe { HIGHEST_HEADER = Some(Box::new(Mutex::new((genesis_block(Network::Bitcoin).bitcoin_hash(), 0)))) };
 424         unsafe { REQUEST_BLOCK = Some(Box::new(Mutex::new(Arc::new((0, genesis_block(Network::Bitcoin).bitcoin_hash(), genesis_block(Network::Bitcoin)))))) };
 425
 426         let trt = tokio::runtime::Builder::new()
 427                 .blocking_threads(2).core_threads(num_cpus::get().max(1) * 2)
 428                 .build().unwrap();
 429
 430         let _ = trt.block_on_all(future::lazy(|| {
 431                 let mut args = env::args();
 432                 args.next();
 433                 let path = args.next().unwrap();
 434                 let trusted_sockaddr: SocketAddr = args.next().unwrap().parse().unwrap();
 435
 436                 let tor_socks5_sockaddr: SocketAddr = args.next().unwrap().parse().unwrap();
 437                 unsafe { TOR_PROXY = Some(tor_socks5_sockaddr); }
 438
 439                 let bgp_sockaddr: SocketAddr = args.next().unwrap().parse().unwrap();
 440
 441                 Store::new(path).and_then(move |store| {
 442                         unsafe { DATA_STORE = Some(Box::new(store)) };
 443                         let store = unsafe { DATA_STORE.as_ref().unwrap() };
 444                         unsafe { PRINTER = Some(Box::new(Printer::new(store))) };
 445
 446                         let bgp_client = BGPClient::new(bgp_sockaddr, Duration::from_secs(60), unsafe { PRINTER.as_ref().unwrap() });
 447                         make_trusted_conn(trusted_sockaddr, Arc::clone(&bgp_client));
 448
 449                         reader::read(store, unsafe { PRINTER.as_ref().unwrap() }, bgp_client);
 450
 451                         future::ok(())
 452                 }).or_else(|_| {
 453                         future::err(())
 454                 })
 455         }));
 456
 457         tokio::run(future::lazy(|| {
 458                 unsafe { DATA_STORE.as_ref().unwrap() }.save_data()
 459         }));
 460 }