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

   1 mod printer;
   2 mod reader;
   3 mod peer;
   4 mod timeout_stream;
   5 mod datastore;
   6
   7 use std::{cmp, env};
   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};
  13
  14 use bitcoin_hashes::sha256d;
  15
  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;
  22
  23 use printer::{Printer, Stat};
  24 use peer::Peer;
  25 use datastore::{AddressState, Store, U64Setting, RegexSetting};
  26 use timeout_stream::TimeoutStream;
  27
  28 use tokio::prelude::*;
  29 use tokio::timer::Delay;
  30
  31 static mut REQUEST_BLOCK: Option<Box<Mutex<Arc<(u64, sha256d::Hash, Block)>>>> = None;
  32 static mut HIGHEST_HEADER: Option<Box<Mutex<(sha256d::Hash, u64)>>> = None;
  33 static mut HEADER_MAP: Option<Box<Mutex<HashMap<sha256d::Hash, u64>>>> = None;
  34 static mut HEIGHT_MAP: Option<Box<Mutex<HashMap<u64, sha256d::Hash>>>> = None;
  35 static mut DATA_STORE: Option<Box<Store>> = None;
  36 static mut PRINTER: Option<Box<Printer>> = None;
  37 pub static START_SHUTDOWN: AtomicBool = AtomicBool::new(false);
  38 static SCANNING: AtomicBool = AtomicBool::new(false);
  39
  40 struct PeerState {
  41         request: Arc<(u64, sha256d::Hash, Block)>,
  42         node_services: u64,
  43         msg: (String, bool),
  44         fail_reason: AddressState,
  45         recvd_version: bool,
  46         recvd_verack: bool,
  47         recvd_addrs: bool,
  48         recvd_block: bool,
  49 }
  50
  51 pub fn scan_node(scan_time: Instant, node: SocketAddr, manual: bool) {
  52         if START_SHUTDOWN.load(Ordering::Relaxed) { return; }
  53         let printer = unsafe { PRINTER.as_ref().unwrap() };
  54         let store = unsafe { DATA_STORE.as_ref().unwrap() };
  55
  56         let peer_state = Arc::new(Mutex::new(PeerState {
  57                 recvd_version: false,
  58                 recvd_verack: false,
  59                 recvd_addrs: false,
  60                 recvd_block: false,
  61                 node_services: 0,
  62                 fail_reason: AddressState::Timeout,
  63                 msg: (String::new(), false),
  64                 request: Arc::clone(&unsafe { REQUEST_BLOCK.as_ref().unwrap() }.lock().unwrap()),
  65         }));
  66         let final_peer_state = Arc::clone(&peer_state);
  67
  68         let peer = Delay::new(scan_time).then(move |_| {
  69                 printer.set_stat(Stat::NewConnection);
  70                 let timeout = store.get_u64(U64Setting::RunTimeout);
  71                 Peer::new(node.clone(), Duration::from_secs(timeout), printer)
  72         });
  73         tokio::spawn(peer.and_then(move |(mut write, read)| {
  74                 TimeoutStream::new_timeout(read, scan_time + Duration::from_secs(store.get_u64(U64Setting::RunTimeout))).map_err(|_| { () }).for_each(move |msg| {
  75                         let mut state_lock = peer_state.lock().unwrap();
  76                         macro_rules! check_set_flag {
  77                                 ($recvd_flag: ident, $msg: expr) => { {
  78                                         if state_lock.$recvd_flag {
  79                                                 state_lock.fail_reason = AddressState::ProtocolViolation;
  80                                                 state_lock.msg = (format!("due to dup {}", $msg), true);
  81                                                 state_lock.$recvd_flag = false;
  82                                                 return future::err(());
  83                                         }
  84                                         state_lock.$recvd_flag = true;
  85                                 } }
  86                         }
  87                         state_lock.fail_reason = AddressState::TimeoutDuringRequest;
  88                         match msg {
  89                                 NetworkMessage::Version(ver) => {
  90                                         if ver.start_height < 0 || ver.start_height as u64 > state_lock.request.0 + 1008*2 {
  91                                                 state_lock.fail_reason = AddressState::HighBlockCount;
  92                                                 return future::err(());
  93                                         }
  94                                         let safe_ua = ver.user_agent.replace(|c: char| !c.is_ascii() || c < ' ' || c > '~', "");
  95                                         if (ver.start_height as u64) < state_lock.request.0 {
  96                                                 state_lock.msg = (format!("({} < {})", ver.start_height, state_lock.request.0), true);
  97                                                 state_lock.fail_reason = AddressState::LowBlockCount;
  98                                                 return future::err(());
  99                                         }
 100                                         let min_version = store.get_u64(U64Setting::MinProtocolVersion);
 101                                         if (ver.version as u64) < min_version {
 102                                                 state_lock.msg = (format!("({} < {})", ver.version, min_version), true);
 103                                                 state_lock.fail_reason = AddressState::LowVersion;
 104                                                 return future::err(());
 105                                         }
 106                                         if ver.services & (1 | (1 << 10)) == 0 {
 107                                                 state_lock.msg = (format!("({}: services {:x})", safe_ua, ver.services), true);
 108                                                 state_lock.fail_reason = AddressState::NotFullNode;
 109                                                 return future::err(());
 110                                         }
 111                                         if !store.get_regex(RegexSetting::SubverRegex).is_match(&ver.user_agent) {
 112                                                 state_lock.msg = (format!("subver {}", safe_ua), true);
 113                                                 state_lock.fail_reason = AddressState::BadVersion;
 114                                                 return future::err(());
 115                                         }
 116                                         check_set_flag!(recvd_version, "version");
 117                                         state_lock.node_services = ver.services;
 118                                         state_lock.msg = (format!("(subver: {})", safe_ua), false);
 119                                         if let Err(_) = write.try_send(NetworkMessage::Verack) {
 120                                                 return future::err(());
 121                                         }
 122                                 },
 123                                 NetworkMessage::Verack => {
 124                                         check_set_flag!(recvd_verack, "verack");
 125                                         if let Err(_) = write.try_send(NetworkMessage::GetAddr) {
 126                                                 return future::err(());
 127                                         }
 128                                 },
 129                                 NetworkMessage::Ping(v) => {
 130                                         if let Err(_) = write.try_send(NetworkMessage::Pong(v)) {
 131                                                 return future::err(())
 132                                         }
 133                                 },
 134                                 NetworkMessage::Addr(addrs) => {
 135                                         if addrs.len() > 1000 {
 136                                                 state_lock.fail_reason = AddressState::ProtocolViolation;
 137                                                 state_lock.msg = (format!("due to oversized addr: {}", addrs.len()), true);
 138                                                 state_lock.recvd_addrs = false;
 139                                                 return future::err(());
 140                                         }
 141                                         if !state_lock.recvd_addrs {
 142                                                 if let Err(_) = write.try_send(NetworkMessage::GetData(vec![Inventory {
 143                                                         inv_type: InvType::WitnessBlock,
 144                                                         hash: state_lock.request.1,
 145                                                 }])) {
 146                                                         return future::err(());
 147                                                 }
 148                                         }
 149                                         state_lock.recvd_addrs = true;
 150                                         unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
 151                                 },
 152                                 NetworkMessage::Block(block) => {
 153                                         if block != state_lock.request.2 {
 154                                                 state_lock.fail_reason = AddressState::ProtocolViolation;
 155                                                 state_lock.msg = ("due to bad block".to_string(), true);
 156                                                 return future::err(());
 157                                         }
 158                                         check_set_flag!(recvd_block, "block");
 159                                         return future::err(());
 160                                 },
 161                                 _ => {},
 162                         }
 163                         future::ok(())
 164                 }).then(|_| {
 165                         future::err(())
 166                 })
 167         }).then(move |_: Result<(), ()>| {
 168                 let printer = unsafe { PRINTER.as_ref().unwrap() };
 169                 let store = unsafe { DATA_STORE.as_ref().unwrap() };
 170                 printer.set_stat(Stat::ConnectionClosed);
 171
 172                 let state_lock = final_peer_state.lock().unwrap();
 173                 if state_lock.recvd_version && state_lock.recvd_verack &&
 174                                 state_lock.recvd_addrs && state_lock.recvd_block {
 175                         let old_state = store.set_node_state(node, AddressState::Good, state_lock.node_services);
 176                         if manual || (old_state != AddressState::Good && state_lock.msg.0 != "") {
 177                                 printer.add_line(format!("Updating {} from {} to Good {}", node, old_state.to_str(), &state_lock.msg.0), state_lock.msg.1);
 178                         }
 179                 } else {
 180                         assert!(state_lock.fail_reason != AddressState::Good);
 181                         let old_state = store.set_node_state(node, state_lock.fail_reason, 0);
 182                         if (manual || old_state != state_lock.fail_reason) && state_lock.fail_reason == AddressState::TimeoutDuringRequest {
 183                                 printer.add_line(format!("Updating {} from {} to Timeout During Request (ver: {}, vack: {}, addr: {}, block: {})",
 184                                         node, old_state.to_str(), state_lock.recvd_version, state_lock.recvd_verack, state_lock.recvd_addrs, state_lock.recvd_block), true);
 185                         } else if manual || (old_state != state_lock.fail_reason && state_lock.msg.0 != "" && state_lock.msg.1) {
 186                                 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);
 187                         }
 188                 }
 189                 future::ok(())
 190         }));
 191 }
 192
 193 fn poll_dnsseeds() {
 194         tokio::spawn(future::lazy(|| {
 195                 let printer = unsafe { PRINTER.as_ref().unwrap() };
 196                 let store = unsafe { DATA_STORE.as_ref().unwrap() };
 197
 198                 let mut new_addrs = 0;
 199                 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() {
 200                         new_addrs += store.add_fresh_addrs((*seed, 8333u16).to_socket_addrs().unwrap_or(Vec::new().into_iter()));
 201                         new_addrs += store.add_fresh_addrs((("x9.".to_string() + seed).as_str(), 8333u16).to_socket_addrs().unwrap_or(Vec::new().into_iter()));
 202                 }
 203                 printer.add_line(format!("Added {} new addresses from other DNS seeds", new_addrs), false);
 204                 Delay::new(Instant::now() + Duration::from_secs(60)).then(|_| {
 205                         if !START_SHUTDOWN.load(Ordering::Relaxed) {
 206                                 poll_dnsseeds();
 207                         }
 208                         future::ok(())
 209                 })
 210         }));
 211 }
 212
 213 fn scan_net() {
 214         tokio::spawn(future::lazy(|| {
 215                 let printer = unsafe { PRINTER.as_ref().unwrap() };
 216                 let store = unsafe { DATA_STORE.as_ref().unwrap() };
 217
 218                 let mut scan_nodes = store.get_next_scan_nodes();
 219                 printer.add_line(format!("Got {} addresses to scan", scan_nodes.len()), false);
 220                 let per_iter_time = Duration::from_millis(1000 / store.get_u64(U64Setting::ConnsPerSec));
 221                 let start_time = Instant::now();
 222                 let mut iter_time = start_time;
 223
 224                 for node in scan_nodes.drain(..) {
 225                         scan_node(iter_time, node, false);
 226                         iter_time += per_iter_time;
 227                 }
 228                 Delay::new(cmp::max(iter_time, start_time + Duration::from_secs(15))).then(|_| {
 229                         let store = unsafe { DATA_STORE.as_ref().unwrap() };
 230                         store.save_data().then(|_| {
 231                                 if !START_SHUTDOWN.load(Ordering::Relaxed) {
 232                                         scan_net();
 233                                 }
 234                                 future::ok(())
 235                         })
 236                 })
 237         }));
 238 }
 239
 240 fn make_trusted_conn(trusted_sockaddr: SocketAddr) {
 241         let printer = unsafe { PRINTER.as_ref().unwrap() };
 242         let trusted_peer = Peer::new(trusted_sockaddr.clone(), Duration::from_secs(600), printer);
 243         tokio::spawn(trusted_peer.and_then(move |(mut trusted_write, trusted_read)| {
 244                 printer.add_line("Connected to local peer".to_string(), false);
 245                 let mut starting_height = 0;
 246                 TimeoutStream::new_persistent(trusted_read, Duration::from_secs(600)).map_err(|_| { () }).for_each(move |msg| {
 247                         if START_SHUTDOWN.load(Ordering::Relaxed) {
 248                                 return future::err(());
 249                         }
 250                         match msg {
 251                                 NetworkMessage::Version(ver) => {
 252                                         if let Err(_) = trusted_write.try_send(NetworkMessage::Verack) {
 253                                                 return future::err(())
 254                                         }
 255                                         starting_height = ver.start_height;
 256                                 },
 257                                 NetworkMessage::Verack => {
 258                                         if let Err(_) = trusted_write.try_send(NetworkMessage::SendHeaders) {
 259                                                 return future::err(());
 260                                         }
 261                                         if let Err(_) = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
 262                                                 version: 70015,
 263                                                 locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
 264                                                 stop_hash: Default::default(),
 265                                         })) {
 266                                                 return future::err(());
 267                                         }
 268                                         if let Err(_) = trusted_write.try_send(NetworkMessage::GetAddr) {
 269                                                 return future::err(());
 270                                         }
 271                                 },
 272                                 NetworkMessage::Addr(addrs) => {
 273                                         unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
 274                                 },
 275                                 NetworkMessage::Headers(headers) => {
 276                                         if headers.is_empty() {
 277                                                 return future::ok(());
 278                                         }
 279                                         let mut header_map = unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap();
 280                                         let mut height_map = unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap();
 281
 282                                         if let Some(height) = header_map.get(&headers[0].prev_blockhash).cloned() {
 283                                                 for i in 0..headers.len() {
 284                                                         let hash = headers[i].bitcoin_hash();
 285                                                         if i < headers.len() - 1 && headers[i + 1].prev_blockhash != hash {
 286                                                                 return future::err(());
 287                                                         }
 288                                                         header_map.insert(headers[i].bitcoin_hash(), height + 1 + (i as u64));
 289                                                         height_map.insert(height + 1 + (i as u64), headers[i].bitcoin_hash());
 290                                                 }
 291
 292                                                 let top_height = height + headers.len() as u64;
 293                                                 *unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap()
 294                                                         = (headers.last().unwrap().bitcoin_hash(), top_height);
 295                                                 printer.set_stat(printer::Stat::HeaderCount(top_height));
 296
 297                                                 if top_height >= starting_height as u64 {
 298                                                         if let Err(_) = trusted_write.try_send(NetworkMessage::GetData(vec![Inventory {
 299                                                                 inv_type: InvType::WitnessBlock,
 300                                                                 hash: height_map.get(&(top_height - 1008)).unwrap().clone(),
 301                                                         }])) {
 302                                                                 return future::err(());
 303                                                         }
 304                                                 }
 305                                         } else {
 306                                                 // Wat? Lets start again...
 307                                                 printer.add_line("Got unconnected headers message from local trusted peer".to_string(), true);
 308                                         }
 309                                         if let Err(_) = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
 310                                                 version: 70015,
 311                                                 locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
 312                                                 stop_hash: Default::default(),
 313                                         })) {
 314                                                 return future::err(())
 315                                         }
 316                                 },
 317                                 NetworkMessage::Block(block) => {
 318                                         let hash = block.header.bitcoin_hash();
 319                                         let header_map = unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap();
 320                                         let height = *header_map.get(&hash).expect("Got loose block from trusted peer we coulnd't have requested");
 321                                         if height == unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().1 - 1008 {
 322                                                 *unsafe { REQUEST_BLOCK.as_ref().unwrap() }.lock().unwrap() = Arc::new((height, hash, block));
 323                                                 if !SCANNING.swap(true, Ordering::SeqCst) {
 324                                                         scan_net();
 325                                                         poll_dnsseeds();
 326                                                 }
 327                                         }
 328                                 },
 329                                 NetworkMessage::Ping(v) => {
 330                                         if let Err(_) = trusted_write.try_send(NetworkMessage::Pong(v)) {
 331                                                 return future::err(())
 332                                         }
 333                                 },
 334                                 _ => {},
 335                         }
 336                         future::ok(())
 337                 }).then(|_| {
 338                         future::err(())
 339                 })
 340         }).then(move |_: Result<(), ()>| {
 341                 if !START_SHUTDOWN.load(Ordering::Relaxed) {
 342                         printer.add_line("Lost connection from trusted peer".to_string(), true);
 343                         make_trusted_conn(trusted_sockaddr);
 344                 }
 345                 future::ok(())
 346         }));
 347 }
 348
 349 fn main() {
 350         if env::args().len() != 3 {
 351                 println!("USAGE: dnsseed-rust datastore localPeerAddress");
 352                 return;
 353         }
 354
 355         unsafe { HEADER_MAP = Some(Box::new(Mutex::new(HashMap::with_capacity(600000)))) };
 356         unsafe { HEIGHT_MAP = Some(Box::new(Mutex::new(HashMap::with_capacity(600000)))) };
 357         unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap().insert(genesis_block(Network::Bitcoin).bitcoin_hash(), 0);
 358         unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap().insert(0, genesis_block(Network::Bitcoin).bitcoin_hash());
 359         unsafe { HIGHEST_HEADER = Some(Box::new(Mutex::new((genesis_block(Network::Bitcoin).bitcoin_hash(), 0)))) };
 360         unsafe { REQUEST_BLOCK = Some(Box::new(Mutex::new(Arc::new((0, genesis_block(Network::Bitcoin).bitcoin_hash(), genesis_block(Network::Bitcoin)))))) };
 361
 362         let trt = tokio::runtime::Builder::new()
 363                 .blocking_threads(2).core_threads(num_cpus::get().max(1) * 3)
 364                 .build().unwrap();
 365
 366         let _ = trt.block_on_all(future::lazy(|| {
 367                 let mut args = env::args();
 368                 args.next();
 369                 let path = args.next().unwrap();
 370                 let addr = args.next().unwrap();
 371
 372                 Store::new(path).and_then(move |store| {
 373                         unsafe { DATA_STORE = Some(Box::new(store)) };
 374                         let store = unsafe { DATA_STORE.as_ref().unwrap() };
 375                         unsafe { PRINTER = Some(Box::new(Printer::new(store))) };
 376
 377                         let trusted_sockaddr: SocketAddr = addr.parse().unwrap();
 378                         make_trusted_conn(trusted_sockaddr);
 379
 380                         reader::read(store, unsafe { PRINTER.as_ref().unwrap() });
 381
 382                         future::ok(())
 383                 }).or_else(|_| {
 384                         future::err(())
 385                 })
 386         }));
 387
 388         tokio::run(future::lazy(|| {
 389                 unsafe { DATA_STORE.as_ref().unwrap() }.save_data()
 390         }));
 391 }