7 use std::collections::HashMap;
8 use std::sync::{Arc, Mutex};
9 use std::time::{Duration, Instant};
10 use std::net::SocketAddr;
12 use bitcoin_hashes::sha256d;
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;
20 use printer::{Printer, Stat};
22 use datastore::{AddressState, Store, U64Setting};
24 use tokio::prelude::*;
25 use tokio::timer::Delay;
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;
39 fail_reason: AddressState,
40 request: (u64, sha256d::Hash),
43 fn scan_node(scan_time: Instant, node: SocketAddr) {
44 let printer = unsafe { PRINTER.as_ref().unwrap() };
45 let store = unsafe { DATA_STORE.as_ref().unwrap() };
47 let peer_state = Arc::new(Mutex::new(PeerState {
53 fail_reason: AddressState::Timeout,
54 request: (0, Default::default()),
56 let final_peer_state = Arc::clone(&peer_state);
58 let peer = Delay::new(scan_time).then(move |_| {
59 printer.set_stat(Stat::NewConnection);
60 let timeout = store.get_u64(U64Setting::RunTimeout);
61 Peer::new(node.clone(), Duration::from_secs(timeout), printer) //TODO: timeout for total run
63 tokio::spawn(peer.and_then(move |conn_split| {
64 let requested_height = unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().1 - 1008;
65 let requested_block = unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap().get(&requested_height).unwrap().clone();
66 peer_state.lock().unwrap().request = (requested_height, requested_block);
68 let (mut write, read) = conn_split;
69 read.map_err(|_| { () }).for_each(move |msg| {
70 let mut state_lock = peer_state.lock().unwrap();
71 macro_rules! check_set_flag {
72 ($recvd_flag: ident, $msg: expr) => { {
73 if state_lock.$recvd_flag {
74 state_lock.fail_reason = AddressState::ProtocolViolation;
75 printer.add_line(format!("Updating {} to ProtocolViolation due to dup {}", node, $msg), true);
76 state_lock.$recvd_flag = false;
77 return future::err(());
79 state_lock.$recvd_flag = true;
82 state_lock.fail_reason = AddressState::TimeoutDuringRequest;
84 NetworkMessage::Version(ver) => {
85 if ver.start_height < 0 || ver.start_height as u64 > state_lock.request.0 + 1008*2 {
86 state_lock.fail_reason = AddressState::HighBlockCount;
87 return future::err(());
89 if (ver.start_height as u64) < state_lock.request.0 {
90 printer.add_line(format!("Updating {} to LowBlockCount ({} < {})", node, ver.start_height, state_lock.request.0), true);
91 state_lock.fail_reason = AddressState::LowBlockCount;
92 return future::err(());
94 let min_version = store.get_u64(U64Setting::MinProtocolVersion);
95 if (ver.version as u64) < min_version {
96 printer.add_line(format!("Updating {} to LowVersion ({} < {})", node, ver.version, min_version), true);
97 state_lock.fail_reason = AddressState::LowVersion;
98 return future::err(());
100 if ver.services & 1 != 1 {
101 printer.add_line(format!("Updating {} to NotFullNode (services {:x})", node, ver.services), true);
102 state_lock.fail_reason = AddressState::NotFullNode;
103 return future::err(());
105 check_set_flag!(recvd_version, "version");
106 state_lock.node_services = ver.services;
107 if let Err(_) = write.try_send(NetworkMessage::Verack) {
108 return future::err(());
111 NetworkMessage::Verack => {
112 check_set_flag!(recvd_verack, "verack");
113 if let Err(_) = write.try_send(NetworkMessage::GetAddr) {
114 return future::err(());
116 if let Err(_) = write.try_send(NetworkMessage::GetData(vec![Inventory {
117 inv_type: InvType::WitnessBlock,
118 hash: state_lock.request.1,
120 return future::err(());
123 NetworkMessage::Ping(v) => {
124 if let Err(_) = write.try_send(NetworkMessage::Pong(v)) {
125 return future::err(())
128 NetworkMessage::Addr(addrs) => {
130 check_set_flag!(recvd_addrs, "addr");
131 unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
134 NetworkMessage::Block(block) => {
135 if block.header.bitcoin_hash() != state_lock.request.1 ||
136 !block.check_merkle_root() || !block.check_witness_commitment() {
137 state_lock.fail_reason = AddressState::ProtocolViolation;
138 printer.add_line(format!("Updating {} to ProtocolViolation due to bad block", node), true);
139 return future::err(());
141 check_set_flag!(recvd_block, "block");
149 }).then(move |_: Result<(), ()>| {
150 let printer = unsafe { PRINTER.as_ref().unwrap() };
151 let store = unsafe { DATA_STORE.as_ref().unwrap() };
152 printer.set_stat(Stat::ConnectionClosed);
154 let state_lock = final_peer_state.lock().unwrap();
155 if state_lock.recvd_version && state_lock.recvd_verack &&
156 state_lock.recvd_addrs && state_lock.recvd_block {
157 store.set_node_state(node, AddressState::Good, state_lock.node_services);
159 assert!(state_lock.fail_reason != AddressState::Good);
160 store.set_node_state(node, state_lock.fail_reason, 0);
167 tokio::spawn(future::lazy(|| {
168 let store = unsafe { DATA_STORE.as_ref().unwrap() };
169 let mut scan_nodes = store.get_next_scan_nodes();
170 let per_iter_time = Duration::from_millis(1000 / store.get_u64(U64Setting::ConnsPerSec));
171 let mut iter_time = Instant::now();
173 for node in scan_nodes.drain(..) {
174 scan_node(iter_time, node);
175 iter_time += per_iter_time;
177 Delay::new(iter_time).then(|_| {
184 fn make_trusted_conn(trusted_sockaddr: SocketAddr) {
185 let printer = unsafe { PRINTER.as_ref().unwrap() };
186 let trusted_peer = Peer::new(trusted_sockaddr.clone(), Duration::from_secs(600), printer);
187 tokio::spawn(trusted_peer.and_then(move |trusted_split| {
188 printer.add_line("Connected to local peer".to_string(), false);
189 let (mut trusted_write, trusted_read) = trusted_split;
190 let mut starting_height = 0;
191 trusted_read.map_err(|_| { () }).for_each(move |msg| {
193 NetworkMessage::Version(ver) => {
194 if let Err(_) = trusted_write.try_send(NetworkMessage::Verack) {
195 return future::err(())
197 starting_height = ver.start_height;
199 NetworkMessage::Verack => {
200 if let Err(_) = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
202 locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
203 stop_hash: Default::default(),
205 return future::err(());
207 if let Err(_) = trusted_write.try_send(NetworkMessage::GetAddr) {
208 return future::err(());
211 NetworkMessage::Addr(addrs) => {
212 unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
214 NetworkMessage::Headers(headers) => {
215 if headers.is_empty() {
216 return future::ok(());
218 let mut header_map = unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap();
219 let mut height_map = unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap();
220 if let Some(height) = header_map.get(&headers[0].prev_blockhash).cloned() {
221 for i in 0..headers.len() {
222 let hash = headers[i].bitcoin_hash();
223 if i < headers.len() - 1 && headers[i + 1].prev_blockhash != hash {
224 return future::err(());
226 header_map.insert(headers[i].bitcoin_hash(), height + 1 + (i as u64));
227 height_map.insert(height + 1 + (i as u64), headers[i].bitcoin_hash());
229 let top_height = height + headers.len() as u64;
230 *unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap()
231 = (headers.last().unwrap().bitcoin_hash(), top_height);
232 printer.set_stat(printer::Stat::HeaderCount(top_height));
233 if top_height >= starting_height as u64 {
237 // Wat? Lets start again...
238 printer.add_line("Got unconnected headers message from local trusted peer".to_string(), true);
240 if let Err(_) = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
242 locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
243 stop_hash: Default::default(),
245 return future::err(())
248 NetworkMessage::Ping(v) => {
249 if let Err(_) = trusted_write.try_send(NetworkMessage::Pong(v)) {
250 return future::err(())
259 }).then(move |_: Result<(), ()>| {
260 printer.add_line("Lost connection from trusted peer".to_string(), true);
261 make_trusted_conn(trusted_sockaddr);
267 if env::args().len() != 3 {
268 println!("USAGE: dnsseed-rust datastore localPeerAddress");
272 unsafe { HEADER_MAP = Some(Box::new(Mutex::new(HashMap::new()))) };
273 unsafe { HEIGHT_MAP = Some(Box::new(Mutex::new(HashMap::new()))) };
274 unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap().insert(genesis_block(Network::Bitcoin).bitcoin_hash(), 0);
275 unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap().insert(0, genesis_block(Network::Bitcoin).bitcoin_hash());
276 unsafe { HIGHEST_HEADER = Some(Box::new(Mutex::new((genesis_block(Network::Bitcoin).bitcoin_hash(), 0)))) };
278 unsafe { DATA_STORE = Some(Box::new(Store::new())) };
279 unsafe { PRINTER = Some(Box::new(Printer::new(DATA_STORE.as_ref().unwrap()))) };
281 tokio::run(future::lazy(|| {
282 let mut args = env::args();
284 let trusted_sockaddr: SocketAddr = args.next().unwrap().parse().unwrap();
285 make_trusted_conn(trusted_sockaddr);