+mod printer;
+mod peer;
+mod timeout_stream;
+mod datastore;
+
+use std::env;
+use std::collections::HashMap;
+use std::sync::{Arc, Mutex};
+use std::time::{Duration, Instant};
+use std::net::SocketAddr;
+
+use bitcoin_hashes::sha256d;
+
+use bitcoin::blockdata::constants::genesis_block;
+use bitcoin::network::constants::Network;
+use bitcoin::network::message::NetworkMessage;
+use bitcoin::network::message_blockdata::{GetHeadersMessage, Inventory, InvType};
+use bitcoin::util::hash::BitcoinHash;
+
+use printer::{Printer, Stat};
+use peer::Peer;
+use datastore::{AddressState, Store, U64Setting};
+
+use tokio::prelude::*;
+use tokio::timer::Delay;
+
+static mut HIGHEST_HEADER: Option<Box<Mutex<(sha256d::Hash, u64)>>> = None;
+static mut HEADER_MAP: Option<Box<Mutex<HashMap<sha256d::Hash, u64>>>> = None;
+static mut HEIGHT_MAP: Option<Box<Mutex<HashMap<u64, sha256d::Hash>>>> = None;
+static mut DATA_STORE: Option<Box<Store>> = None;
+static mut PRINTER: Option<Box<Printer>> = None;
+
+struct PeerState {
+ recvd_version: bool,
+ recvd_verack: bool,
+ recvd_addrs: bool,
+ recvd_block: bool,
+ node_services: u64,
+ fail_reason: AddressState,
+ request: (u64, sha256d::Hash),
+}
+
+fn scan_net() {
+ tokio::spawn(future::lazy(|| {
+ let store = unsafe { DATA_STORE.as_ref().unwrap() };
+ let printer = unsafe { PRINTER.as_ref().unwrap() };
+
+ let mut scan_nodes = store.get_next_scan_nodes();
+ let timeout = store.get_u64(U64Setting::RunTimeout);
+ let per_iter_time = Duration::from_millis(1000 / store.get_u64(U64Setting::ConnsPerSec));
+ let mut iter_time = Instant::now();
+ let requested_height = unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().1 - 1008;
+ let requested_block = unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap().get(&requested_height).unwrap().clone();
+
+ for node in scan_nodes.drain(..) {
+ let peer_state = Arc::new(Mutex::new(PeerState {
+ recvd_version: false,
+ recvd_verack: false,
+ recvd_addrs: false,
+ recvd_block: false,
+ node_services: 0,
+ fail_reason: AddressState::Timeout,
+ request: (requested_height, requested_block),
+ }));
+ let final_peer_state = Arc::clone(&peer_state);
+ let peer = Delay::new(iter_time).then(move |_| {
+ printer.set_stat(Stat::NewConnection);
+ Peer::new(node.clone(), Duration::from_secs(timeout), printer) //TODO: timeout for total run
+ });
+ iter_time += per_iter_time;
+ tokio::spawn(peer.and_then(move |conn_split| {
+ let (mut write, read) = conn_split;
+ read.map_err(|_| { () }).for_each(move |msg| {
+ let mut state_lock = peer_state.lock().unwrap();
+ macro_rules! check_set_flag {
+ ($recvd_flag: ident, $msg: expr) => { {
+ if state_lock.$recvd_flag {
+ state_lock.fail_reason = AddressState::ProtocolViolation;
+ printer.add_line(format!("Updating {} to ProtocolViolation due to dup {}", node, $msg), true);
+ state_lock.$recvd_flag = false;
+ return future::err(());
+ }
+ state_lock.$recvd_flag = true;
+ } }
+ }
+ state_lock.fail_reason = AddressState::TimeoutDuringRequest;
+ match msg {
+ NetworkMessage::Version(ver) => {
+ if ver.start_height < 0 || ver.start_height as u64 > state_lock.request.0 + 1008*2 {
+ state_lock.fail_reason = AddressState::HighBlockCount;
+ return future::err(());
+ }
+ if (ver.start_height as u64) < state_lock.request.0 {
+ printer.add_line(format!("Updating {} to LowBlockCount ({} < {})", node, ver.start_height, state_lock.request.0), true);
+ state_lock.fail_reason = AddressState::LowBlockCount;
+ return future::err(());
+ }
+ let min_version = store.get_u64(U64Setting::MinProtocolVersion);
+ if (ver.version as u64) < min_version {
+ printer.add_line(format!("Updating {} to LowVersion ({} < {})", node, ver.version, min_version), true);
+ state_lock.fail_reason = AddressState::LowVersion;
+ return future::err(());
+ }
+ if ver.services & 1 != 1 {
+ printer.add_line(format!("Updating {} to NotFullNode (services {:x})", node, ver.services), true);
+ state_lock.fail_reason = AddressState::NotFullNode;
+ return future::err(());
+ }
+ check_set_flag!(recvd_version, "version");
+ state_lock.node_services = ver.services;
+ if let Err(_) = write.try_send(NetworkMessage::Verack) {
+ return future::err(());
+ }
+ },
+ NetworkMessage::Verack => {
+ check_set_flag!(recvd_verack, "verack");
+ if let Err(_) = write.try_send(NetworkMessage::GetAddr) {
+ return future::err(());
+ }
+ if let Err(_) = write.try_send(NetworkMessage::GetData(vec![Inventory {
+ inv_type: InvType::WitnessBlock,
+ hash: state_lock.request.1,
+ }])) {
+ return future::err(());
+ }
+ },
+ NetworkMessage::Ping(v) => {
+ if let Err(_) = write.try_send(NetworkMessage::Pong(v)) {
+ return future::err(())
+ }
+ },
+ NetworkMessage::Addr(addrs) => {
+ if addrs.len() > 1 {
+ check_set_flag!(recvd_addrs, "addr");
+ unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
+ }
+ },
+ NetworkMessage::Block(block) => {
+ if block.header.bitcoin_hash() != state_lock.request.1 ||
+ !block.check_merkle_root() || !block.check_witness_commitment() {
+ state_lock.fail_reason = AddressState::ProtocolViolation;
+ printer.add_line(format!("Updating {} to ProtocolViolation due to bad block", node), true);
+ return future::err(());
+ }
+ check_set_flag!(recvd_block, "block");
+ },
+ _ => {},
+ }
+ future::ok(())
+ }).then(|_| {
+ future::err(())
+ })
+ }).then(move |_: Result<(), ()>| {
+ let printer = unsafe { PRINTER.as_ref().unwrap() };
+ let store = unsafe { DATA_STORE.as_ref().unwrap() };
+
+ printer.set_stat(Stat::ConnectionClosed);
+
+ let state_lock = final_peer_state.lock().unwrap();
+ if state_lock.recvd_version && state_lock.recvd_verack &&
+ state_lock.recvd_addrs && state_lock.recvd_block {
+ store.set_node_state(node, AddressState::Good, state_lock.node_services);
+ } else {
+ if state_lock.fail_reason == AddressState::Timeout || state_lock.fail_reason == AddressState::TimeoutDuringRequest {
+ printer.add_line(format!("Updating {} to Timeout[DuringRequest]", node), true);
+ }
+ assert!(state_lock.fail_reason != AddressState::Good);
+ store.set_node_state(node, state_lock.fail_reason, 0);
+ }
+ future::ok(())
+ }));
+ }
+ Delay::new(iter_time).then(|_| {
+ scan_net();
+ future::ok(())
+ })
+ }));
+}
+
+fn make_trusted_conn(trusted_sockaddr: SocketAddr) {
+ let printer = unsafe { PRINTER.as_ref().unwrap() };
+ let trusted_peer = Peer::new(trusted_sockaddr.clone(), Duration::from_secs(600), printer);
+ tokio::spawn(trusted_peer.and_then(move |trusted_split| {
+ printer.add_line("Connected to local peer".to_string(), false);
+ let (mut trusted_write, trusted_read) = trusted_split;
+ let mut starting_height = 0;
+ trusted_read.map_err(|_| { () }).for_each(move |msg| {
+ match msg {
+ NetworkMessage::Version(ver) => {
+ if let Err(_) = trusted_write.try_send(NetworkMessage::Verack) {
+ return future::err(())
+ }
+ starting_height = ver.start_height;
+ },
+ NetworkMessage::Verack => {
+ if let Err(_) = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
+ version: 70015,
+ locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
+ stop_hash: Default::default(),
+ })) {
+ return future::err(());
+ }
+ if let Err(_) = trusted_write.try_send(NetworkMessage::GetAddr) {
+ return future::err(());
+ }
+ },
+ NetworkMessage::Addr(addrs) => {
+ unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
+ },
+ NetworkMessage::Headers(headers) => {
+ if headers.is_empty() {
+ return future::ok(());
+ }
+ let mut header_map = unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap();
+ let mut height_map = unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap();
+ if let Some(height) = header_map.get(&headers[0].prev_blockhash).cloned() {
+ for i in 0..headers.len() {
+ let hash = headers[i].bitcoin_hash();
+ if i < headers.len() - 1 && headers[i + 1].prev_blockhash != hash {
+ return future::err(());
+ }
+ header_map.insert(headers[i].bitcoin_hash(), height + 1 + (i as u64));
+ height_map.insert(height + 1 + (i as u64), headers[i].bitcoin_hash());
+ }
+ let top_height = height + headers.len() as u64;
+ *unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap()
+ = (headers.last().unwrap().bitcoin_hash(), top_height);
+ printer.set_stat(printer::Stat::HeaderCount(top_height));
+ if top_height >= starting_height as u64 {
+ scan_net();
+ }
+ } else {
+ // Wat? Lets start again...
+ printer.add_line("Got unconnected headers message from local trusted peer".to_string(), true);
+ }
+ if let Err(_) = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
+ version: 70015,
+ locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
+ stop_hash: Default::default(),
+ })) {
+ return future::err(())
+ }
+ },
+ NetworkMessage::Ping(v) => {
+ if let Err(_) = trusted_write.try_send(NetworkMessage::Pong(v)) {
+ return future::err(())
+ }
+ },
+ _ => {},
+ }
+ future::ok(())
+ }).then(|_| {
+ future::err(())
+ })
+ }).then(move |_: Result<(), ()>| {
+ printer.add_line("Lost connection from trusted peer".to_string(), true);
+ make_trusted_conn(trusted_sockaddr);
+ future::ok(())
+ }));
+}
+
+fn main() {
+ if env::args().len() != 3 {
+ println!("USAGE: dnsseed-rust datastore localPeerAddress");
+ return;
+ }
+
+ unsafe { HEADER_MAP = Some(Box::new(Mutex::new(HashMap::new()))) };
+ unsafe { HEIGHT_MAP = Some(Box::new(Mutex::new(HashMap::new()))) };
+ unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap().insert(genesis_block(Network::Bitcoin).bitcoin_hash(), 0);
+ unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap().insert(0, genesis_block(Network::Bitcoin).bitcoin_hash());
+ unsafe { HIGHEST_HEADER = Some(Box::new(Mutex::new((genesis_block(Network::Bitcoin).bitcoin_hash(), 0)))) };
+
+ unsafe { DATA_STORE = Some(Box::new(Store::new())) };
+ unsafe { PRINTER = Some(Box::new(Printer::new(DATA_STORE.as_ref().unwrap()))) };
+
+ tokio::run(future::lazy(|| {
+ let mut args = env::args();
+ args.next();
+ let trusted_sockaddr: SocketAddr = args.next().unwrap().parse().unwrap();
+ make_trusted_conn(trusted_sockaddr);
+
+ future::ok(())
+ }));
+}