_ 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::constants::genesis_block;
  17 use bitcoin::network::constants::Network;
  18 use bitcoin::network::message::NetworkMessage;
  19 use bitcoin::network::message_blockdata::{GetHeadersMessage, Inventory, InvType};
  20 use bitcoin::util::hash::BitcoinHash;
  21
  22 use printer::{Printer, Stat};
  23 use peer::Peer;
  24 use datastore::{AddressState, Store, U64Setting, RegexSetting};
  25 use timeout_stream::TimeoutStream;
  26
  27 use tokio::prelude::*;
  28 use tokio::timer::Delay;
  29
  30 static mut HIGHEST_HEADER: Option<Box<Mutex<(sha256d::Hash, u64)>>> = None;
  31 static mut HEADER_MAP: Option<Box<Mutex<HashMap<sha256d::Hash, u64>>>> = None;
  32 static mut HEIGHT_MAP: Option<Box<Mutex<HashMap<u64, sha256d::Hash>>>> = None;
  33 static mut DATA_STORE: Option<Box<Store>> = None;
  34 static mut PRINTER: Option<Box<Printer>> = None;
  35 pub static START_SHUTDOWN: AtomicBool = AtomicBool::new(false);
  36 static SCANNING: AtomicBool = AtomicBool::new(false);
  37
  38 struct PeerState {
  39         request: (u64, sha256d::Hash),
  40         node_services: u64,
  41         msg: (String, bool),
  42         fail_reason: AddressState,
  43         recvd_version: bool,
  44         recvd_verack: bool,
  45         recvd_addrs: bool,
  46         recvd_block: bool,
  47 }
  48
  49 pub fn scan_node(scan_time: Instant, node: SocketAddr) {
  50         if START_SHUTDOWN.load(Ordering::Relaxed) { return; }
  51         let printer = unsafe { PRINTER.as_ref().unwrap() };
  52         let store = unsafe { DATA_STORE.as_ref().unwrap() };
  53
  54         let peer_state = Arc::new(Mutex::new(PeerState {
  55                 recvd_version: false,
  56                 recvd_verack: false,
  57                 recvd_addrs: false,
  58                 recvd_block: false,
  59                 node_services: 0,
  60                 fail_reason: AddressState::Timeout,
  61                 msg: (String::new(), false),
  62                 request: (0, Default::default()),
  63         }));
  64         let final_peer_state = Arc::clone(&peer_state);
  65
  66         let peer = Delay::new(scan_time).then(move |_| {
  67                 printer.set_stat(Stat::NewConnection);
  68                 let timeout = store.get_u64(U64Setting::RunTimeout);
  69                 Peer::new(node.clone(), Duration::from_secs(timeout), printer)
  70         });
  71         tokio::spawn(peer.and_then(move |(mut write, read)| {
  72                 let requested_height = unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().1 - 1008;
  73                 let requested_block = unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap().get(&requested_height).unwrap().clone();
  74                 peer_state.lock().unwrap().request = (requested_height, requested_block);
  75
  76                 TimeoutStream::new_timeout(read, scan_time + Duration::from_secs(store.get_u64(U64Setting::RunTimeout))).map_err(|_| { () }).for_each(move |msg| {
  77                         let mut state_lock = peer_state.lock().unwrap();
  78                         macro_rules! check_set_flag {
  79                                 ($recvd_flag: ident, $msg: expr) => { {
  80                                         if state_lock.$recvd_flag {
  81                                                 state_lock.fail_reason = AddressState::ProtocolViolation;
  82                                                 state_lock.msg = (format!("ProtocolViolation due to dup {}", $msg), true);
  83                                                 state_lock.$recvd_flag = false;
  84                                                 return future::err(());
  85                                         }
  86                                         state_lock.$recvd_flag = true;
  87                                 } }
  88                         }
  89                         state_lock.fail_reason = AddressState::TimeoutDuringRequest;
  90                         match msg {
  91                                 NetworkMessage::Version(ver) => {
  92                                         if ver.start_height < 0 || ver.start_height as u64 > state_lock.request.0 + 1008*2 {
  93                                                 state_lock.fail_reason = AddressState::HighBlockCount;
  94                                                 return future::err(());
  95                                         }
  96                                         let safe_ua = ver.user_agent.replace(|c: char| !c.is_ascii() || c < ' ' || c > '~', "");
  97                                         if (ver.start_height as u64) < state_lock.request.0 {
  98                                                 state_lock.msg = (format!("LowBlockCount ({} < {})", ver.start_height, state_lock.request.0), true);
  99                                                 state_lock.fail_reason = AddressState::LowBlockCount;
 100                                                 return future::err(());
 101                                         }
 102                                         let min_version = store.get_u64(U64Setting::MinProtocolVersion);
 103                                         if (ver.version as u64) < min_version {
 104                                                 state_lock.msg = (format!("LowVersion ({} < {})", ver.version, min_version), true);
 105                                                 state_lock.fail_reason = AddressState::LowVersion;
 106                                                 return future::err(());
 107                                         }
 108                                         if ver.services & (1 | (1 << 10)) == 0 {
 109                                                 state_lock.msg = (format!("NotFullNode ({}: services {:x})", safe_ua, ver.services), true);
 110                                                 state_lock.fail_reason = AddressState::NotFullNode;
 111                                                 return future::err(());
 112                                         }
 113                                         if !store.get_regex(RegexSetting::SubverRegex).is_match(&ver.user_agent) {
 114                                                 state_lock.msg = (format!("BadVersion subver {}", safe_ua), true);
 115                                                 state_lock.fail_reason = AddressState::BadVersion;
 116                                                 return future::err(());
 117                                         }
 118                                         check_set_flag!(recvd_version, "version");
 119                                         state_lock.node_services = ver.services;
 120                                         state_lock.msg = (format!("to Good: {}", safe_ua), false);
 121                                         if let Err(_) = write.try_send(NetworkMessage::Verack) {
 122                                                 return future::err(());
 123                                         }
 124                                 },
 125                                 NetworkMessage::Verack => {
 126                                         check_set_flag!(recvd_verack, "verack");
 127                                         if let Err(_) = write.try_send(NetworkMessage::GetAddr) {
 128                                                 return future::err(());
 129                                         }
 130                                 },
 131                                 NetworkMessage::Ping(v) => {
 132                                         if let Err(_) = write.try_send(NetworkMessage::Pong(v)) {
 133                                                 return future::err(())
 134                                         }
 135                                 },
 136                                 NetworkMessage::Addr(addrs) => {
 137                                         if addrs.len() > 1000 {
 138                                                 state_lock.fail_reason = AddressState::ProtocolViolation;
 139                                                 state_lock.msg = (format!("ProtocolViolation due to oversized addr: {}", addrs.len()), true);
 140                                                 state_lock.recvd_addrs = false;
 141                                                 return future::err(());
 142                                         }
 143                                         if !state_lock.recvd_addrs {
 144                                                 if let Err(_) = write.try_send(NetworkMessage::GetData(vec![Inventory {
 145                                                         inv_type: InvType::WitnessBlock,
 146                                                         hash: state_lock.request.1,
 147                                                 }])) {
 148                                                         return future::err(());
 149                                                 }
 150                                         }
 151                                         state_lock.recvd_addrs = true;
 152                                         unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
 153                                 },
 154                                 NetworkMessage::Block(block) => {
 155                                         if block.header.bitcoin_hash() != state_lock.request.1 ||
 156                                                         !block.check_merkle_root() || !block.check_witness_commitment() {
 157                                                 state_lock.fail_reason = AddressState::ProtocolViolation;
 158                                                 state_lock.msg = ("ProtocolViolation due to bad block".to_string(), true);
 159                                                 return future::err(());
 160                                         }
 161                                         check_set_flag!(recvd_block, "block");
 162                                 },
 163                                 _ => {},
 164                         }
 165                         future::ok(())
 166                 }).then(|_| {
 167                         future::err(())
 168                 })
 169         }).then(move |_: Result<(), ()>| {
 170                 let printer = unsafe { PRINTER.as_ref().unwrap() };
 171                 let store = unsafe { DATA_STORE.as_ref().unwrap() };
 172                 printer.set_stat(Stat::ConnectionClosed);
 173
 174                 let state_lock = final_peer_state.lock().unwrap();
 175                 if state_lock.recvd_version && state_lock.recvd_verack &&
 176                                 state_lock.recvd_addrs && state_lock.recvd_block {
 177                         let old_state = store.set_node_state(node, AddressState::Good, state_lock.node_services);
 178                         if old_state != AddressState::Good && state_lock.msg.0 != "" {
 179                                 printer.add_line(format!("Updating {} from {} to {}", node, old_state.to_str(), &state_lock.msg.0), state_lock.msg.1);
 180                         }
 181                 } else {
 182                         assert!(state_lock.fail_reason != AddressState::Good);
 183                         let old_state = store.set_node_state(node, state_lock.fail_reason, 0);
 184                         if old_state != state_lock.fail_reason && state_lock.msg.0 != "" && state_lock.msg.1 {
 185                                 printer.add_line(format!("Updating {} from {} to {}", node, old_state.to_str(), &state_lock.msg.0), state_lock.msg.1);
 186                         } else if old_state != state_lock.fail_reason && state_lock.fail_reason == AddressState::TimeoutDuringRequest {
 187                                 printer.add_line(format!("Updating {} from {} to Timeout During Request (ver: {}, vack: {}, addr: {}, block: {})",
 188                                         node, old_state.to_str(), state_lock.recvd_version, state_lock.recvd_verack, state_lock.recvd_addrs, state_lock.recvd_block), true);
 189                         }
 190                 }
 191                 future::ok(())
 192         }));
 193 }
 194
 195 fn poll_dnsseeds() {
 196         tokio::spawn(future::lazy(|| {
 197                 let printer = unsafe { PRINTER.as_ref().unwrap() };
 198                 let store = unsafe { DATA_STORE.as_ref().unwrap() };
 199
 200                 let mut new_addrs = 0;
 201                 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() {
 202                         new_addrs += store.add_fresh_addrs((*seed, 8333u16).to_socket_addrs().unwrap_or(Vec::new().into_iter()));
 203                         new_addrs += store.add_fresh_addrs((("x9.".to_string() + seed).as_str(), 8333u16).to_socket_addrs().unwrap_or(Vec::new().into_iter()));
 204                 }
 205                 printer.add_line(format!("Added {} new addresses from other DNS seeds", new_addrs), false);
 206                 Delay::new(Instant::now() + Duration::from_secs(60)).then(|_| {
 207                         if !START_SHUTDOWN.load(Ordering::Relaxed) {
 208                                 poll_dnsseeds();
 209                         }
 210                         future::ok(())
 211                 })
 212         }));
 213 }
 214
 215 fn scan_net() {
 216         tokio::spawn(future::lazy(|| {
 217                 let store = unsafe { DATA_STORE.as_ref().unwrap() };
 218
 219                 let mut scan_nodes = store.get_next_scan_nodes();
 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);
 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                                         if let Some(height) = header_map.get(&headers[0].prev_blockhash).cloned() {
 282                                                 for i in 0..headers.len() {
 283                                                         let hash = headers[i].bitcoin_hash();
 284                                                         if i < headers.len() - 1 && headers[i + 1].prev_blockhash != hash {
 285                                                                 return future::err(());
 286                                                         }
 287                                                         header_map.insert(headers[i].bitcoin_hash(), height + 1 + (i as u64));
 288                                                         height_map.insert(height + 1 + (i as u64), headers[i].bitcoin_hash());
 289                                                 }
 290                                                 let top_height = height + headers.len() as u64;
 291                                                 *unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap()
 292                                                         = (headers.last().unwrap().bitcoin_hash(), top_height);
 293                                                 printer.set_stat(printer::Stat::HeaderCount(top_height));
 294                                                 if top_height >= starting_height as u64 {
 295                                                         if !SCANNING.swap(true, Ordering::SeqCst) {
 296                                                                 scan_net();
 297                                                                 poll_dnsseeds();
 298                                                         }
 299                                                 }
 300                                         } else {
 301                                                 // Wat? Lets start again...
 302                                                 printer.add_line("Got unconnected headers message from local trusted peer".to_string(), true);
 303                                         }
 304                                         if let Err(_) = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
 305                                                 version: 70015,
 306                                                 locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
 307                                                 stop_hash: Default::default(),
 308                                         })) {
 309                                                 return future::err(())
 310                                         }
 311                                 },
 312                                 NetworkMessage::Ping(v) => {
 313                                         if let Err(_) = trusted_write.try_send(NetworkMessage::Pong(v)) {
 314                                                 return future::err(())
 315                                         }
 316                                 },
 317                                 _ => {},
 318                         }
 319                         future::ok(())
 320                 }).then(|_| {
 321                         future::err(())
 322                 })
 323         }).then(move |_: Result<(), ()>| {
 324                 if !START_SHUTDOWN.load(Ordering::Relaxed) {
 325                         printer.add_line("Lost connection from trusted peer".to_string(), true);
 326                         make_trusted_conn(trusted_sockaddr);
 327                 }
 328                 future::ok(())
 329         }));
 330 }
 331
 332 fn main() {
 333         if env::args().len() != 3 {
 334                 println!("USAGE: dnsseed-rust datastore localPeerAddress");
 335                 return;
 336         }
 337
 338         unsafe { HEADER_MAP = Some(Box::new(Mutex::new(HashMap::with_capacity(600000)))) };
 339         unsafe { HEIGHT_MAP = Some(Box::new(Mutex::new(HashMap::with_capacity(600000)))) };
 340         unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap().insert(genesis_block(Network::Bitcoin).bitcoin_hash(), 0);
 341         unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap().insert(0, genesis_block(Network::Bitcoin).bitcoin_hash());
 342         unsafe { HIGHEST_HEADER = Some(Box::new(Mutex::new((genesis_block(Network::Bitcoin).bitcoin_hash(), 0)))) };
 343
 344         tokio::run(future::lazy(|| {
 345                 let mut args = env::args();
 346                 args.next();
 347                 let path = args.next().unwrap();
 348                 let addr = args.next().unwrap();
 349
 350                 Store::new(path).and_then(move |store| {
 351                         unsafe { DATA_STORE = Some(Box::new(store)) };
 352                         let store = unsafe { DATA_STORE.as_ref().unwrap() };
 353                         unsafe { PRINTER = Some(Box::new(Printer::new(store))) };
 354
 355                         let trusted_sockaddr: SocketAddr = addr.parse().unwrap();
 356                         make_trusted_conn(trusted_sockaddr);
 357
 358                         reader::read(store, unsafe { PRINTER.as_ref().unwrap() });
 359
 360                         future::ok(())
 361                 }).or_else(|_| {
 362                         future::err(())
 363                 })
 364         }));
 365
 366         tokio::run(future::lazy(|| {
 367                 unsafe { DATA_STORE.as_ref().unwrap() }.save_data()
 368         }));
 369 }