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;
14 use bitcoin_hashes::sha256d;
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;
22 use printer::{Printer, Stat};
24 use datastore::{AddressState, Store, U64Setting, RegexSetting};
25 use timeout_stream::TimeoutStream;
27 use tokio::prelude::*;
28 use tokio::timer::Delay;
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);
38 request: (u64, sha256d::Hash),
41 fail_reason: AddressState,
48 pub fn scan_node(scan_time: Instant, node: SocketAddr) {
49 if START_SHUTDOWN.load(Ordering::Relaxed) { return; }
50 let printer = unsafe { PRINTER.as_ref().unwrap() };
51 let store = unsafe { DATA_STORE.as_ref().unwrap() };
53 let peer_state = Arc::new(Mutex::new(PeerState {
59 fail_reason: AddressState::Timeout,
60 msg: (String::new(), false),
61 request: (0, Default::default()),
63 let final_peer_state = Arc::clone(&peer_state);
65 let peer = Delay::new(scan_time).then(move |_| {
66 printer.set_stat(Stat::NewConnection);
67 let timeout = store.get_u64(U64Setting::RunTimeout);
68 Peer::new(node.clone(), Duration::from_secs(timeout), printer)
70 tokio::spawn(peer.and_then(move |(mut write, read)| {
71 let requested_height = unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().1 - 1008;
72 let requested_block = unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap().get(&requested_height).unwrap().clone();
73 peer_state.lock().unwrap().request = (requested_height, requested_block);
75 TimeoutStream::new_timeout(read, scan_time + Duration::from_secs(store.get_u64(U64Setting::RunTimeout))).map_err(|_| { () }).for_each(move |msg| {
76 let mut state_lock = peer_state.lock().unwrap();
77 macro_rules! check_set_flag {
78 ($recvd_flag: ident, $msg: expr) => { {
79 if state_lock.$recvd_flag {
80 state_lock.fail_reason = AddressState::ProtocolViolation;
81 state_lock.msg = (format!("ProtocolViolation due to dup {}", $msg), true);
82 state_lock.$recvd_flag = false;
83 return future::err(());
85 state_lock.$recvd_flag = true;
88 state_lock.fail_reason = AddressState::TimeoutDuringRequest;
90 NetworkMessage::Version(ver) => {
91 if ver.start_height < 0 || ver.start_height as u64 > state_lock.request.0 + 1008*2 {
92 state_lock.fail_reason = AddressState::HighBlockCount;
93 return future::err(());
95 let safe_ua = ver.user_agent.replace(|c: char| !c.is_ascii() || c < ' ' || c > '~', "");
96 if (ver.start_height as u64) < state_lock.request.0 {
97 state_lock.msg = (format!("LowBlockCount ({} < {})", ver.start_height, state_lock.request.0), true);
98 state_lock.fail_reason = AddressState::LowBlockCount;
99 return future::err(());
101 let min_version = store.get_u64(U64Setting::MinProtocolVersion);
102 if (ver.version as u64) < min_version {
103 state_lock.msg = (format!("LowVersion ({} < {})", ver.version, min_version), true);
104 state_lock.fail_reason = AddressState::LowVersion;
105 return future::err(());
107 if ver.services & (1 | (1 << 10)) == 0 {
108 state_lock.msg = (format!("NotFullNode ({}: services {:x})", safe_ua, ver.services), true);
109 state_lock.fail_reason = AddressState::NotFullNode;
110 return future::err(());
112 if !store.get_regex(RegexSetting::SubverRegex).is_match(&ver.user_agent) {
113 state_lock.msg = (format!("BadVersion subver {}", safe_ua), true);
114 state_lock.fail_reason = AddressState::BadVersion;
115 return future::err(());
117 check_set_flag!(recvd_version, "version");
118 state_lock.node_services = ver.services;
119 state_lock.msg = (format!("to Good: {}", safe_ua), false);
120 if let Err(_) = write.try_send(NetworkMessage::Verack) {
121 return future::err(());
124 NetworkMessage::Verack => {
125 check_set_flag!(recvd_verack, "verack");
126 if let Err(_) = write.try_send(NetworkMessage::GetAddr) {
127 return future::err(());
130 NetworkMessage::Ping(v) => {
131 if let Err(_) = write.try_send(NetworkMessage::Pong(v)) {
132 return future::err(())
135 NetworkMessage::Addr(addrs) => {
136 if addrs.len() > 1000 {
137 state_lock.fail_reason = AddressState::ProtocolViolation;
138 state_lock.msg = (format!("ProtocolViolation due to oversized addr: {}", addrs.len()), true);
139 state_lock.recvd_addrs = false;
140 return future::err(());
142 if !state_lock.recvd_addrs {
143 if let Err(_) = write.try_send(NetworkMessage::GetData(vec![Inventory {
144 inv_type: InvType::WitnessBlock,
145 hash: state_lock.request.1,
147 return future::err(());
150 state_lock.recvd_addrs = true;
151 unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
153 NetworkMessage::Block(block) => {
154 if block.header.bitcoin_hash() != state_lock.request.1 ||
155 !block.check_merkle_root() || !block.check_witness_commitment() {
156 state_lock.fail_reason = AddressState::ProtocolViolation;
157 state_lock.msg = ("ProtocolViolation due to bad block".to_string(), true);
158 return future::err(());
160 check_set_flag!(recvd_block, "block");
168 }).then(move |_: Result<(), ()>| {
169 let printer = unsafe { PRINTER.as_ref().unwrap() };
170 let store = unsafe { DATA_STORE.as_ref().unwrap() };
171 printer.set_stat(Stat::ConnectionClosed);
173 let state_lock = final_peer_state.lock().unwrap();
174 if state_lock.recvd_version && state_lock.recvd_verack &&
175 state_lock.recvd_addrs && state_lock.recvd_block {
176 let old_state = store.set_node_state(node, AddressState::Good, state_lock.node_services);
177 if old_state != AddressState::Good && state_lock.msg.0 != "" {
178 printer.add_line(format!("Updating {} from {} to {}", node, old_state.to_str(), &state_lock.msg.0), state_lock.msg.1);
181 assert!(state_lock.fail_reason != AddressState::Good);
182 let old_state = store.set_node_state(node, state_lock.fail_reason, 0);
183 if old_state != state_lock.fail_reason && state_lock.msg.0 != "" {
184 printer.add_line(format!("Updating {} from {} to {}", node, old_state.to_str(), &state_lock.msg.0), state_lock.msg.1);
192 tokio::spawn(future::lazy(|| {
193 let store = unsafe { DATA_STORE.as_ref().unwrap() };
194 let mut scan_nodes = store.get_next_scan_nodes();
195 let per_iter_time = Duration::from_millis(1000 / store.get_u64(U64Setting::ConnsPerSec));
196 let mut iter_time = Instant::now();
198 for node in scan_nodes.drain(..) {
199 scan_node(iter_time, node);
200 iter_time += per_iter_time;
202 Delay::new(iter_time).then(|_| {
203 let store = unsafe { DATA_STORE.as_ref().unwrap() };
204 store.save_data().then(|_| {
205 if !START_SHUTDOWN.load(Ordering::Relaxed) {
214 fn make_trusted_conn(trusted_sockaddr: SocketAddr) {
215 let printer = unsafe { PRINTER.as_ref().unwrap() };
216 let trusted_peer = Peer::new(trusted_sockaddr.clone(), Duration::from_secs(600), printer);
217 tokio::spawn(trusted_peer.and_then(move |(mut trusted_write, trusted_read)| {
218 printer.add_line("Connected to local peer".to_string(), false);
219 let mut starting_height = 0;
220 TimeoutStream::new_persistent(trusted_read, Duration::from_secs(600)).map_err(|_| { () }).for_each(move |msg| {
221 if START_SHUTDOWN.load(Ordering::Relaxed) {
222 return future::err(());
225 NetworkMessage::Version(ver) => {
226 if let Err(_) = trusted_write.try_send(NetworkMessage::Verack) {
227 return future::err(())
229 starting_height = ver.start_height;
231 NetworkMessage::Verack => {
232 if let Err(_) = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
234 locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
235 stop_hash: Default::default(),
237 return future::err(());
239 if let Err(_) = trusted_write.try_send(NetworkMessage::GetAddr) {
240 return future::err(());
243 NetworkMessage::Addr(addrs) => {
244 unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
246 NetworkMessage::Headers(headers) => {
247 if headers.is_empty() {
248 return future::ok(());
250 let mut header_map = unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap();
251 let mut height_map = unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap();
252 if let Some(height) = header_map.get(&headers[0].prev_blockhash).cloned() {
253 for i in 0..headers.len() {
254 let hash = headers[i].bitcoin_hash();
255 if i < headers.len() - 1 && headers[i + 1].prev_blockhash != hash {
256 return future::err(());
258 header_map.insert(headers[i].bitcoin_hash(), height + 1 + (i as u64));
259 height_map.insert(height + 1 + (i as u64), headers[i].bitcoin_hash());
261 let top_height = height + headers.len() as u64;
262 *unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap()
263 = (headers.last().unwrap().bitcoin_hash(), top_height);
264 printer.set_stat(printer::Stat::HeaderCount(top_height));
265 if top_height >= starting_height as u64 {
269 // Wat? Lets start again...
270 printer.add_line("Got unconnected headers message from local trusted peer".to_string(), true);
272 if let Err(_) = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
274 locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
275 stop_hash: Default::default(),
277 return future::err(())
280 NetworkMessage::Ping(v) => {
281 if let Err(_) = trusted_write.try_send(NetworkMessage::Pong(v)) {
282 return future::err(())
291 }).then(move |_: Result<(), ()>| {
292 if !START_SHUTDOWN.load(Ordering::Relaxed) {
293 printer.add_line("Lost connection from trusted peer".to_string(), true);
294 make_trusted_conn(trusted_sockaddr);
301 if env::args().len() != 3 {
302 println!("USAGE: dnsseed-rust datastore localPeerAddress");
306 unsafe { HEADER_MAP = Some(Box::new(Mutex::new(HashMap::new()))) };
307 unsafe { HEIGHT_MAP = Some(Box::new(Mutex::new(HashMap::new()))) };
308 unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap().insert(genesis_block(Network::Bitcoin).bitcoin_hash(), 0);
309 unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap().insert(0, genesis_block(Network::Bitcoin).bitcoin_hash());
310 unsafe { HIGHEST_HEADER = Some(Box::new(Mutex::new((genesis_block(Network::Bitcoin).bitcoin_hash(), 0)))) };
312 tokio::run(future::lazy(|| {
313 let mut args = env::args();
315 let path = args.next().unwrap();
316 let addr = args.next().unwrap();
318 Store::new(path).and_then(move |store| {
319 unsafe { DATA_STORE = Some(Box::new(store)) };
320 let store = unsafe { DATA_STORE.as_ref().unwrap() };
321 unsafe { PRINTER = Some(Box::new(Printer::new(store))) };
323 let trusted_sockaddr: SocketAddr = addr.parse().unwrap();
324 make_trusted_conn(trusted_sockaddr);
326 reader::read(store, unsafe { PRINTER.as_ref().unwrap() });
334 tokio::run(future::lazy(|| {
335 unsafe { DATA_STORE.as_ref().unwrap() }.save_data()