_ 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::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;
  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
  37 struct PeerState {
  38         recvd_version: bool,
  39         recvd_verack: bool,
  40         recvd_addrs: bool,
  41         recvd_block: bool,
  42         node_services: u64,
  43         fail_reason: AddressState,
  44         request: (u64, sha256d::Hash),
  45 }
  46
  47 pub fn scan_node(scan_time: Instant, node: SocketAddr) {
  48         if START_SHUTDOWN.load(Ordering::Relaxed) { return; }
  49         let printer = unsafe { PRINTER.as_ref().unwrap() };
  50         let store = unsafe { DATA_STORE.as_ref().unwrap() };
  51
  52         let peer_state = Arc::new(Mutex::new(PeerState {
  53                 recvd_version: false,
  54                 recvd_verack: false,
  55                 recvd_addrs: false,
  56                 recvd_block: false,
  57                 node_services: 0,
  58                 fail_reason: AddressState::Timeout,
  59                 request: (0, Default::default()),
  60         }));
  61         let final_peer_state = Arc::clone(&peer_state);
  62
  63         let peer = Delay::new(scan_time).then(move |_| {
  64                 printer.set_stat(Stat::NewConnection);
  65                 let timeout = store.get_u64(U64Setting::RunTimeout);
  66                 Peer::new(node.clone(), Duration::from_secs(timeout), printer)
  67         });
  68         tokio::spawn(peer.and_then(move |(mut write, read)| {
  69                 let requested_height = unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().1 - 1008;
  70                 let requested_block = unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap().get(&requested_height).unwrap().clone();
  71                 peer_state.lock().unwrap().request = (requested_height, requested_block);
  72
  73                 TimeoutStream::new_timeout(read, scan_time + Duration::from_secs(store.get_u64(U64Setting::RunTimeout))).map_err(|_| { () }).for_each(move |msg| {
  74                         let mut state_lock = peer_state.lock().unwrap();
  75                         macro_rules! check_set_flag {
  76                                 ($recvd_flag: ident, $msg: expr) => { {
  77                                         if state_lock.$recvd_flag {
  78                                                 state_lock.fail_reason = AddressState::ProtocolViolation;
  79                                                 printer.add_line(format!("Updating {} to ProtocolViolation due to dup {}", node, $msg), true);
  80                                                 state_lock.$recvd_flag = false;
  81                                                 return future::err(());
  82                                         }
  83                                         state_lock.$recvd_flag = true;
  84                                 } }
  85                         }
  86                         state_lock.fail_reason = AddressState::TimeoutDuringRequest;
  87                         match msg {
  88                                 NetworkMessage::Version(ver) => {
  89                                         if ver.start_height < 0 || ver.start_height as u64 > state_lock.request.0 + 1008*2 {
  90                                                 state_lock.fail_reason = AddressState::HighBlockCount;
  91                                                 return future::err(());
  92                                         }
  93                                         if (ver.start_height as u64) < state_lock.request.0 {
  94                                                 printer.add_line(format!("Updating {} to LowBlockCount ({} < {})", node, ver.start_height, state_lock.request.0), true);
  95                                                 state_lock.fail_reason = AddressState::LowBlockCount;
  96                                                 return future::err(());
  97                                         }
  98                                         let min_version = store.get_u64(U64Setting::MinProtocolVersion);
  99                                         if (ver.version as u64) < min_version {
 100                                                 printer.add_line(format!("Updating {} to LowVersion ({} < {})", node, ver.version, min_version), true);
 101                                                 state_lock.fail_reason = AddressState::LowVersion;
 102                                                 return future::err(());
 103                                         }
 104                                         if ver.services & (1 | (1 << 10)) == 0 {
 105                                                 printer.add_line(format!("Updating {} to NotFullNode (services {:x})", node, ver.services), true);
 106                                                 state_lock.fail_reason = AddressState::NotFullNode;
 107                                                 return future::err(());
 108                                         }
 109                                         if !store.get_regex(RegexSetting::SubverRegex).is_match(&ver.user_agent) {
 110                                                 printer.add_line(format!("Updating {} to BadVersion subver {}", node, ver.user_agent.replace(|c: char| !c.is_ascii() || c < ' ' || c > '~', "")), true);
 111                                                 state_lock.fail_reason = AddressState::BadVersion;
 112                                                 return future::err(());
 113                                         }
 114                                         check_set_flag!(recvd_version, "version");
 115                                         state_lock.node_services = ver.services;
 116                                         if let Err(_) = write.try_send(NetworkMessage::Verack) {
 117                                                 return future::err(());
 118                                         }
 119                                 },
 120                                 NetworkMessage::Verack => {
 121                                         check_set_flag!(recvd_verack, "verack");
 122                                         if let Err(_) = write.try_send(NetworkMessage::GetAddr) {
 123                                                 return future::err(());
 124                                         }
 125                                         if let Err(_) = write.try_send(NetworkMessage::GetData(vec![Inventory {
 126                                                 inv_type: InvType::WitnessBlock,
 127                                                 hash: state_lock.request.1,
 128                                         }])) {
 129                                                 return future::err(());
 130                                         }
 131                                 },
 132                                 NetworkMessage::Ping(v) => {
 133                                         if let Err(_) = write.try_send(NetworkMessage::Pong(v)) {
 134                                                 return future::err(())
 135                                         }
 136                                 },
 137                                 NetworkMessage::Addr(addrs) => {
 138                                         if addrs.len() > 1000 {
 139                                                 state_lock.fail_reason = AddressState::ProtocolViolation;
 140                                                 printer.add_line(format!("Updating {} to ProtocolViolation due to oversized addr: {}", node, addrs.len()), true);
 141                                                 state_lock.recvd_addrs = false;
 142                                                 return future::err(());
 143                                         }
 144                                         state_lock.recvd_addrs = true;
 145                                         unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
 146                                 },
 147                                 NetworkMessage::Block(block) => {
 148                                         if block.header.bitcoin_hash() != state_lock.request.1 ||
 149                                                         !block.check_merkle_root() || !block.check_witness_commitment() {
 150                                                 state_lock.fail_reason = AddressState::ProtocolViolation;
 151                                                 printer.add_line(format!("Updating {} to ProtocolViolation due to bad block", node), true);
 152                                                 return future::err(());
 153                                         }
 154                                         check_set_flag!(recvd_block, "block");
 155                                 },
 156                                 _ => {},
 157                         }
 158                         future::ok(())
 159                 }).then(|_| {
 160                         future::err(())
 161                 })
 162         }).then(move |_: Result<(), ()>| {
 163                 let printer = unsafe { PRINTER.as_ref().unwrap() };
 164                 let store = unsafe { DATA_STORE.as_ref().unwrap() };
 165                 printer.set_stat(Stat::ConnectionClosed);
 166
 167                 let state_lock = final_peer_state.lock().unwrap();
 168                 if state_lock.recvd_version && state_lock.recvd_verack &&
 169                                 state_lock.recvd_addrs && state_lock.recvd_block {
 170                         store.set_node_state(node, AddressState::Good, state_lock.node_services);
 171                 } else {
 172                         assert!(state_lock.fail_reason != AddressState::Good);
 173                         store.set_node_state(node, state_lock.fail_reason, 0);
 174                 }
 175                 future::ok(())
 176         }));
 177 }
 178
 179 fn scan_net() {
 180         tokio::spawn(future::lazy(|| {
 181                 let store = unsafe { DATA_STORE.as_ref().unwrap() };
 182                 let mut scan_nodes = store.get_next_scan_nodes();
 183                 let per_iter_time = Duration::from_millis(1000 / store.get_u64(U64Setting::ConnsPerSec));
 184                 let mut iter_time = Instant::now();
 185
 186                 for node in scan_nodes.drain(..) {
 187                         scan_node(iter_time, node);
 188                         iter_time += per_iter_time;
 189                 }
 190                 Delay::new(iter_time).then(|_| {
 191                         let store = unsafe { DATA_STORE.as_ref().unwrap() };
 192                         store.save_data().then(|_| {
 193                                 if !START_SHUTDOWN.load(Ordering::Relaxed) {
 194                                         scan_net();
 195                                 }
 196                                 future::ok(())
 197                         })
 198                 })
 199         }));
 200 }
 201
 202 fn make_trusted_conn(trusted_sockaddr: SocketAddr) {
 203         let printer = unsafe { PRINTER.as_ref().unwrap() };
 204         let trusted_peer = Peer::new(trusted_sockaddr.clone(), Duration::from_secs(600), printer);
 205         tokio::spawn(trusted_peer.and_then(move |(mut trusted_write, trusted_read)| {
 206                 printer.add_line("Connected to local peer".to_string(), false);
 207                 let mut starting_height = 0;
 208                 TimeoutStream::new_persistent(trusted_read, Duration::from_secs(600)).map_err(|_| { () }).for_each(move |msg| {
 209                         if START_SHUTDOWN.load(Ordering::Relaxed) {
 210                                 return future::err(());
 211                         }
 212                         match msg {
 213                                 NetworkMessage::Version(ver) => {
 214                                         if let Err(_) = trusted_write.try_send(NetworkMessage::Verack) {
 215                                                 return future::err(())
 216                                         }
 217                                         starting_height = ver.start_height;
 218                                 },
 219                                 NetworkMessage::Verack => {
 220                                         if let Err(_) = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
 221                                                 version: 70015,
 222                                                 locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
 223                                                 stop_hash: Default::default(),
 224                                         })) {
 225                                                 return future::err(());
 226                                         }
 227                                         if let Err(_) = trusted_write.try_send(NetworkMessage::GetAddr) {
 228                                                 return future::err(());
 229                                         }
 230                                 },
 231                                 NetworkMessage::Addr(addrs) => {
 232                                         unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
 233                                 },
 234                                 NetworkMessage::Headers(headers) => {
 235                                         if headers.is_empty() {
 236                                                 return future::ok(());
 237                                         }
 238                                         let mut header_map = unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap();
 239                                         let mut height_map = unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap();
 240                                         if let Some(height) = header_map.get(&headers[0].prev_blockhash).cloned() {
 241                                                 for i in 0..headers.len() {
 242                                                         let hash = headers[i].bitcoin_hash();
 243                                                         if i < headers.len() - 1 && headers[i + 1].prev_blockhash != hash {
 244                                                                 return future::err(());
 245                                                         }
 246                                                         header_map.insert(headers[i].bitcoin_hash(), height + 1 + (i as u64));
 247                                                         height_map.insert(height + 1 + (i as u64), headers[i].bitcoin_hash());
 248                                                 }
 249                                                 let top_height = height + headers.len() as u64;
 250                                                 *unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap()
 251                                                         = (headers.last().unwrap().bitcoin_hash(), top_height);
 252                                                 printer.set_stat(printer::Stat::HeaderCount(top_height));
 253                                                 if top_height >= starting_height as u64 {
 254                                                         scan_net();
 255                                                 }
 256                                         } else {
 257                                                 // Wat? Lets start again...
 258                                                 printer.add_line("Got unconnected headers message from local trusted peer".to_string(), true);
 259                                         }
 260                                         if let Err(_) = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
 261                                                 version: 70015,
 262                                                 locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
 263                                                 stop_hash: Default::default(),
 264                                         })) {
 265                                                 return future::err(())
 266                                         }
 267                                 },
 268                                 NetworkMessage::Ping(v) => {
 269                                         if let Err(_) = trusted_write.try_send(NetworkMessage::Pong(v)) {
 270                                                 return future::err(())
 271                                         }
 272                                 },
 273                                 _ => {},
 274                         }
 275                         future::ok(())
 276                 }).then(|_| {
 277                         future::err(())
 278                 })
 279         }).then(move |_: Result<(), ()>| {
 280                 if !START_SHUTDOWN.load(Ordering::Relaxed) {
 281                         printer.add_line("Lost connection from trusted peer".to_string(), true);
 282                         make_trusted_conn(trusted_sockaddr);
 283                 }
 284                 future::ok(())
 285         }));
 286 }
 287
 288 fn main() {
 289         if env::args().len() != 3 {
 290                 println!("USAGE: dnsseed-rust datastore localPeerAddress");
 291                 return;
 292         }
 293
 294         unsafe { HEADER_MAP = Some(Box::new(Mutex::new(HashMap::new()))) };
 295         unsafe { HEIGHT_MAP = Some(Box::new(Mutex::new(HashMap::new()))) };
 296         unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap().insert(genesis_block(Network::Bitcoin).bitcoin_hash(), 0);
 297         unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap().insert(0, genesis_block(Network::Bitcoin).bitcoin_hash());
 298         unsafe { HIGHEST_HEADER = Some(Box::new(Mutex::new((genesis_block(Network::Bitcoin).bitcoin_hash(), 0)))) };
 299
 300         tokio::run(future::lazy(|| {
 301                 let mut args = env::args();
 302                 args.next();
 303                 let path = args.next().unwrap();
 304                 let addr = args.next().unwrap();
 305
 306                 Store::new(path).and_then(move |store| {
 307                         unsafe { DATA_STORE = Some(Box::new(store)) };
 308                         let store = unsafe { DATA_STORE.as_ref().unwrap() };
 309                         unsafe { PRINTER = Some(Box::new(Printer::new(store))) };
 310
 311                         let trusted_sockaddr: SocketAddr = addr.parse().unwrap();
 312                         make_trusted_conn(trusted_sockaddr);
 313
 314                         reader::read(store, unsafe { PRINTER.as_ref().unwrap() });
 315
 316                         future::ok(())
 317                 }).or_else(|_| {
 318                         future::err(())
 319                 })
 320         }));
 321
 322         tokio::run(future::lazy(|| {
 323                 unsafe { DATA_STORE.as_ref().unwrap() }.save_data()
 324         }));
 325 }