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

   1 mod printer;
   2 mod peer;
   3 mod timeout_stream;
   4 mod datastore;
   5
   6 use std::env;
   7 use std::collections::HashMap;
   8 use std::sync::{Arc, Mutex};
   9 use std::time::{Duration, Instant};
  10 use std::net::SocketAddr;
  11
  12 use bitcoin_hashes::sha256d;
  13
  14 use bitcoin::blockdata::constants::genesis_block;
  15 use bitcoin::network::constants::Network;
  16 use bitcoin::network::message::NetworkMessage;
  17 use bitcoin::network::message_blockdata::{GetHeadersMessage, Inventory, InvType};
  18 use bitcoin::util::hash::BitcoinHash;
  19
  20 use printer::{Printer, Stat};
  21 use peer::Peer;
  22 use datastore::{AddressState, Store, U64Setting};
  23
  24 use tokio::prelude::*;
  25 use tokio::timer::Delay;
  26
  27 static mut HIGHEST_HEADER: Option<Box<Mutex<(sha256d::Hash, u64)>>> = None;
  28 static mut HEADER_MAP: Option<Box<Mutex<HashMap<sha256d::Hash, u64>>>> = None;
  29 static mut HEIGHT_MAP: Option<Box<Mutex<HashMap<u64, sha256d::Hash>>>> = None;
  30 static mut DATA_STORE: Option<Box<Store>> = None;
  31 static mut PRINTER: Option<Box<Printer>> = None;
  32
  33 struct PeerState {
  34         recvd_version: bool,
  35         recvd_verack: bool,
  36         recvd_addrs: bool,
  37         recvd_block: bool,
  38         node_services: u64,
  39         fail_reason: AddressState,
  40         request: (u64, sha256d::Hash),
  41 }
  42
  43 fn scan_net() {
  44         tokio::spawn(future::lazy(|| {
  45                 let store = unsafe { DATA_STORE.as_ref().unwrap() };
  46                 let printer = unsafe { PRINTER.as_ref().unwrap() };
  47
  48                 let mut scan_nodes = store.get_next_scan_nodes();
  49                 let timeout = store.get_u64(U64Setting::RunTimeout);
  50                 let per_iter_time = Duration::from_millis(1000 / store.get_u64(U64Setting::ConnsPerSec));
  51                 let mut iter_time = Instant::now();
  52                 let requested_height = unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().1 - 1008;
  53                 let requested_block = unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap().get(&requested_height).unwrap().clone();
  54
  55                 for node in scan_nodes.drain(..) {
  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                                 request: (requested_height, requested_block),
  64                         }));
  65                         let final_peer_state = Arc::clone(&peer_state);
  66                         let peer = Delay::new(iter_time).then(move |_| {
  67                                 printer.set_stat(Stat::NewConnection);
  68                                 Peer::new(node.clone(), Duration::from_secs(timeout), printer) //TODO: timeout for total run
  69                         });
  70                         iter_time += per_iter_time;
  71                         tokio::spawn(peer.and_then(move |conn_split| {
  72                                 let (mut write, read) = conn_split;
  73                                 read.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 {
 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                                                         check_set_flag!(recvd_version, "version");
 110                                                         state_lock.node_services = ver.services;
 111                                                         if let Err(_) = write.try_send(NetworkMessage::Verack) {
 112                                                                 return future::err(());
 113                                                         }
 114                                                 },
 115                                                 NetworkMessage::Verack => {
 116                                                         check_set_flag!(recvd_verack, "verack");
 117                                                         if let Err(_) = write.try_send(NetworkMessage::GetAddr) {
 118                                                                 return future::err(());
 119                                                         }
 120                                                         if let Err(_) = write.try_send(NetworkMessage::GetData(vec![Inventory {
 121                                                                 inv_type: InvType::WitnessBlock,
 122                                                                 hash: state_lock.request.1,
 123                                                         }])) {
 124                                                                 return future::err(());
 125                                                         }
 126                                                 },
 127                                                 NetworkMessage::Ping(v) => {
 128                                                         if let Err(_) = write.try_send(NetworkMessage::Pong(v)) {
 129                                                                 return future::err(())
 130                                                         }
 131                                                 },
 132                                                 NetworkMessage::Addr(addrs) => {
 133                                                         if addrs.len() > 1 {
 134                                                                 check_set_flag!(recvd_addrs, "addr");
 135                                                                 unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
 136                                                         }
 137                                                 },
 138                                                 NetworkMessage::Block(block) => {
 139                                                         if block.header.bitcoin_hash() != state_lock.request.1 ||
 140                                                                         !block.check_merkle_root() || !block.check_witness_commitment() {
 141                                                                 state_lock.fail_reason = AddressState::ProtocolViolation;
 142                                                                 printer.add_line(format!("Updating {} to ProtocolViolation due to bad block", node), true);
 143                                                                 return future::err(());
 144                                                         }
 145                                                         check_set_flag!(recvd_block, "block");
 146                                                 },
 147                                                 _ => {},
 148                                         }
 149                                         future::ok(())
 150                                 }).then(|_| {
 151                                         future::err(())
 152                                 })
 153                         }).then(move |_: Result<(), ()>| {
 154                                 let printer = unsafe { PRINTER.as_ref().unwrap() };
 155                                 let store = unsafe { DATA_STORE.as_ref().unwrap() };
 156
 157                                 printer.set_stat(Stat::ConnectionClosed);
 158
 159                                 let state_lock = final_peer_state.lock().unwrap();
 160                                 if state_lock.recvd_version && state_lock.recvd_verack &&
 161                                                 state_lock.recvd_addrs && state_lock.recvd_block {
 162                                         store.set_node_state(node, AddressState::Good, state_lock.node_services);
 163                                 } else {
 164                                         if state_lock.fail_reason == AddressState::Timeout || state_lock.fail_reason == AddressState::TimeoutDuringRequest {
 165                                                 printer.add_line(format!("Updating {} to Timeout[DuringRequest]", node), true);
 166                                         }
 167                                         assert!(state_lock.fail_reason != AddressState::Good);
 168                                         store.set_node_state(node, state_lock.fail_reason, 0);
 169                                 }
 170                                 future::ok(())
 171                         }));
 172                 }
 173                 Delay::new(iter_time).then(|_| {
 174                         scan_net();
 175                         future::ok(())
 176                 })
 177         }));
 178 }
 179
 180 fn make_trusted_conn(trusted_sockaddr: SocketAddr) {
 181         let printer = unsafe { PRINTER.as_ref().unwrap() };
 182         let trusted_peer = Peer::new(trusted_sockaddr.clone(), Duration::from_secs(600), printer);
 183         tokio::spawn(trusted_peer.and_then(move |trusted_split| {
 184                 printer.add_line("Connected to local peer".to_string(), false);
 185                 let (mut trusted_write, trusted_read) = trusted_split;
 186                 let mut starting_height = 0;
 187                 trusted_read.map_err(|_| { () }).for_each(move |msg| {
 188                         match msg {
 189                                 NetworkMessage::Version(ver) => {
 190                                         if let Err(_) = trusted_write.try_send(NetworkMessage::Verack) {
 191                                                 return future::err(())
 192                                         }
 193                                         starting_height = ver.start_height;
 194                                 },
 195                                 NetworkMessage::Verack => {
 196                                         if let Err(_) = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
 197                                                 version: 70015,
 198                                                 locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
 199                                                 stop_hash: Default::default(),
 200                                         })) {
 201                                                 return future::err(());
 202                                         }
 203                                         if let Err(_) = trusted_write.try_send(NetworkMessage::GetAddr) {
 204                                                 return future::err(());
 205                                         }
 206                                 },
 207                                 NetworkMessage::Addr(addrs) => {
 208                                         unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
 209                                 },
 210                                 NetworkMessage::Headers(headers) => {
 211                                         if headers.is_empty() {
 212                                                 return future::ok(());
 213                                         }
 214                                         let mut header_map = unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap();
 215                                         let mut height_map = unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap();
 216                                         if let Some(height) = header_map.get(&headers[0].prev_blockhash).cloned() {
 217                                                 for i in 0..headers.len() {
 218                                                         let hash = headers[i].bitcoin_hash();
 219                                                         if i < headers.len() - 1 && headers[i + 1].prev_blockhash != hash {
 220                                                                 return future::err(());
 221                                                         }
 222                                                         header_map.insert(headers[i].bitcoin_hash(), height + 1 + (i as u64));
 223                                                         height_map.insert(height + 1 + (i as u64), headers[i].bitcoin_hash());
 224                                                 }
 225                                                 let top_height = height + headers.len() as u64;
 226                                                 *unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap()
 227                                                         = (headers.last().unwrap().bitcoin_hash(), top_height);
 228                                                 printer.set_stat(printer::Stat::HeaderCount(top_height));
 229                                                 if top_height >= starting_height as u64 {
 230                                                         scan_net();
 231                                                 }
 232                                         } else {
 233                                                 // Wat? Lets start again...
 234                                                 printer.add_line("Got unconnected headers message from local trusted peer".to_string(), true);
 235                                         }
 236                                         if let Err(_) = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
 237                                                 version: 70015,
 238                                                 locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
 239                                                 stop_hash: Default::default(),
 240                                         })) {
 241                                                 return future::err(())
 242                                         }
 243                                 },
 244                                 NetworkMessage::Ping(v) => {
 245                                         if let Err(_) = trusted_write.try_send(NetworkMessage::Pong(v)) {
 246                                                 return future::err(())
 247                                         }
 248                                 },
 249                                 _ => {},
 250                         }
 251                         future::ok(())
 252                 }).then(|_| {
 253                         future::err(())
 254                 })
 255         }).then(move |_: Result<(), ()>| {
 256                 printer.add_line("Lost connection from trusted peer".to_string(), true);
 257                 make_trusted_conn(trusted_sockaddr);
 258                 future::ok(())
 259         }));
 260 }
 261
 262 fn main() {
 263         if env::args().len() != 3 {
 264                 println!("USAGE: dnsseed-rust datastore localPeerAddress");
 265                 return;
 266         }
 267
 268         unsafe { HEADER_MAP = Some(Box::new(Mutex::new(HashMap::new()))) };
 269         unsafe { HEIGHT_MAP = Some(Box::new(Mutex::new(HashMap::new()))) };
 270         unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap().insert(genesis_block(Network::Bitcoin).bitcoin_hash(), 0);
 271         unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap().insert(0, genesis_block(Network::Bitcoin).bitcoin_hash());
 272         unsafe { HIGHEST_HEADER = Some(Box::new(Mutex::new((genesis_block(Network::Bitcoin).bitcoin_hash(), 0)))) };
 273
 274         unsafe { DATA_STORE = Some(Box::new(Store::new())) };
 275         unsafe { PRINTER = Some(Box::new(Printer::new(DATA_STORE.as_ref().unwrap()))) };
 276
 277         tokio::run(future::lazy(|| {
 278                 let mut args = env::args();
 279                 args.next();
 280                 let trusted_sockaddr: SocketAddr = args.next().unwrap().parse().unwrap();
 281                 make_trusted_conn(trusted_sockaddr);
 282
 283                 future::ok(())
 284         }));
 285 }