_ Git - rust-lightning/blob - fuzz/src/router.rs

   1 // This file is Copyright its original authors, visible in version control
   2 // history.
   3 //
   4 // This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
   5 // or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   6 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
   7 // You may not use this file except in accordance with one or both of these
   8 // licenses.
   9
  10 use bitcoin::blockdata::script::Builder;
  11 use bitcoin::blockdata::transaction::TxOut;
  12 use bitcoin::hash_types::BlockHash;
  13
  14 use lightning::chain;
  15 use lightning::chain::transaction::OutPoint;
  16 use lightning::ln::channelmanager::{ChannelDetails, ChannelCounterparty};
  17 use lightning::ln::features::InitFeatures;
  18 use lightning::ln::msgs;
  19 use lightning::routing::router::{find_route, PaymentParameters, RouteHint, RouteHintHop, RouteParameters};
  20 use lightning::routing::scoring::FixedPenaltyScorer;
  21 use lightning::util::logger::Logger;
  22 use lightning::util::ser::Readable;
  23 use lightning::routing::network_graph::{NetworkGraph, RoutingFees};
  24
  25 use bitcoin::hashes::Hash;
  26 use bitcoin::secp256k1::key::PublicKey;
  27 use bitcoin::network::constants::Network;
  28 use bitcoin::blockdata::constants::genesis_block;
  29
  30 use utils::test_logger;
  31
  32 use std::collections::HashSet;
  33 use std::sync::Arc;
  34 use std::sync::atomic::{AtomicUsize, Ordering};
  35
  36 #[inline]
  37 pub fn slice_to_be16(v: &[u8]) -> u16 {
  38         ((v[0] as u16) << 8*1) |
  39         ((v[1] as u16) << 8*0)
  40 }
  41
  42 #[inline]
  43 pub fn slice_to_be32(v: &[u8]) -> u32 {
  44         ((v[0] as u32) << 8*3) |
  45         ((v[1] as u32) << 8*2) |
  46         ((v[2] as u32) << 8*1) |
  47         ((v[3] as u32) << 8*0)
  48 }
  49
  50 #[inline]
  51 pub fn slice_to_be64(v: &[u8]) -> u64 {
  52         ((v[0] as u64) << 8*7) |
  53         ((v[1] as u64) << 8*6) |
  54         ((v[2] as u64) << 8*5) |
  55         ((v[3] as u64) << 8*4) |
  56         ((v[4] as u64) << 8*3) |
  57         ((v[5] as u64) << 8*2) |
  58         ((v[6] as u64) << 8*1) |
  59         ((v[7] as u64) << 8*0)
  60 }
  61
  62
  63 struct InputData {
  64         data: Vec<u8>,
  65         read_pos: AtomicUsize,
  66 }
  67 impl InputData {
  68         fn get_slice(&self, len: usize) -> Option<&[u8]> {
  69                 let old_pos = self.read_pos.fetch_add(len, Ordering::AcqRel);
  70                 if self.data.len() < old_pos + len {
  71                         return None;
  72                 }
  73                 Some(&self.data[old_pos..old_pos + len])
  74         }
  75         fn get_slice_nonadvancing(&self, len: usize) -> Option<&[u8]> {
  76                 let old_pos = self.read_pos.load(Ordering::Acquire);
  77                 if self.data.len() < old_pos + len {
  78                         return None;
  79                 }
  80                 Some(&self.data[old_pos..old_pos + len])
  81         }
  82 }
  83
  84 struct FuzzChainSource {
  85         input: Arc<InputData>,
  86 }
  87 impl chain::Access for FuzzChainSource {
  88         fn get_utxo(&self, _genesis_hash: &BlockHash, _short_channel_id: u64) -> Result<TxOut, chain::AccessError> {
  89                 match self.input.get_slice(2) {
  90                         Some(&[0, _]) => Err(chain::AccessError::UnknownChain),
  91                         Some(&[1, _]) => Err(chain::AccessError::UnknownTx),
  92                         Some(&[_, x]) => Ok(TxOut { value: 0, script_pubkey: Builder::new().push_int(x as i64).into_script().to_v0_p2wsh() }),
  93                         None => Err(chain::AccessError::UnknownTx),
  94                         _ => unreachable!(),
  95                 }
  96         }
  97 }
  98
  99 #[inline]
 100 pub fn do_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 101         let input = Arc::new(InputData {
 102                 data: data.to_vec(),
 103                 read_pos: AtomicUsize::new(0),
 104         });
 105         macro_rules! get_slice_nonadvancing {
 106                 ($len: expr) => {
 107                         match input.get_slice_nonadvancing($len as usize) {
 108                                 Some(slice) => slice,
 109                                 None => return,
 110                         }
 111                 }
 112         }
 113         macro_rules! get_slice {
 114                 ($len: expr) => {
 115                         match input.get_slice($len as usize) {
 116                                 Some(slice) => slice,
 117                                 None => return,
 118                         }
 119                 }
 120         }
 121
 122         macro_rules! decode_msg {
 123                 ($MsgType: path, $len: expr) => {{
 124                         let mut reader = ::std::io::Cursor::new(get_slice!($len));
 125                         match <$MsgType>::read(&mut reader) {
 126                                 Ok(msg) => {
 127                                         assert_eq!(reader.position(), $len as u64);
 128                                         msg
 129                                 },
 130                                 Err(e) => match e {
 131                                         msgs::DecodeError::UnknownVersion => return,
 132                                         msgs::DecodeError::UnknownRequiredFeature => return,
 133                                         msgs::DecodeError::InvalidValue => return,
 134                                         msgs::DecodeError::BadLengthDescriptor => return,
 135                                         msgs::DecodeError::ShortRead => panic!("We picked the length..."),
 136                                         msgs::DecodeError::Io(e) => panic!("{:?}", e),
 137                                         msgs::DecodeError::UnsupportedCompression => return,
 138                                 }
 139                         }
 140                 }}
 141         }
 142
 143         macro_rules! decode_msg_with_len16 {
 144                 ($MsgType: path, $excess: expr) => {
 145                         {
 146                                 let extra_len = slice_to_be16(get_slice_nonadvancing!(2));
 147                                 decode_msg!($MsgType, 2 + (extra_len as usize) + $excess)
 148                         }
 149                 }
 150         }
 151
 152         macro_rules! get_pubkey {
 153                 () => {
 154                         match PublicKey::from_slice(get_slice!(33)) {
 155                                 Ok(key) => key,
 156                                 Err(_) => return,
 157                         }
 158                 }
 159         }
 160
 161         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new("".to_owned(), out));
 162
 163         let our_pubkey = get_pubkey!();
 164         let net_graph = NetworkGraph::new(genesis_block(Network::Bitcoin).header.block_hash());
 165
 166         let mut node_pks = HashSet::new();
 167         let mut scid = 42;
 168
 169         loop {
 170                 match get_slice!(1)[0] {
 171                         0 => {
 172                                 let start_len = slice_to_be16(&get_slice_nonadvancing!(2)[0..2]) as usize;
 173                                 let addr_len = slice_to_be16(&get_slice_nonadvancing!(start_len+2 + 74)[start_len+2 + 72..start_len+2 + 74]);
 174                                 if addr_len > (37+1)*4 {
 175                                         return;
 176                                 }
 177                                 let msg = decode_msg_with_len16!(msgs::UnsignedNodeAnnouncement, 288);
 178                                 node_pks.insert(msg.node_id);
 179                                 let _ = net_graph.update_node_from_unsigned_announcement(&msg);
 180                         },
 181                         1 => {
 182                                 let msg = decode_msg_with_len16!(msgs::UnsignedChannelAnnouncement, 32+8+33*4);
 183                                 node_pks.insert(msg.node_id_1);
 184                                 node_pks.insert(msg.node_id_2);
 185                                 let _ = net_graph.update_channel_from_unsigned_announcement::<&FuzzChainSource>(&msg, &None);
 186                         },
 187                         2 => {
 188                                 let msg = decode_msg_with_len16!(msgs::UnsignedChannelAnnouncement, 32+8+33*4);
 189                                 node_pks.insert(msg.node_id_1);
 190                                 node_pks.insert(msg.node_id_2);
 191                                 let _ = net_graph.update_channel_from_unsigned_announcement(&msg, &Some(&FuzzChainSource { input: Arc::clone(&input) }));
 192                         },
 193                         3 => {
 194                                 let _ = net_graph.update_channel_unsigned(&decode_msg!(msgs::UnsignedChannelUpdate, 72));
 195                         },
 196                         4 => {
 197                                 let short_channel_id = slice_to_be64(get_slice!(8));
 198                                 net_graph.close_channel_from_update(short_channel_id, false);
 199                         },
 200                         _ if node_pks.is_empty() => {},
 201                         _ => {
 202                                 let mut first_hops_vec = Vec::new();
 203                                 let first_hops = match get_slice!(1)[0] {
 204                                         0 => None,
 205                                         count => {
 206                                                 for _ in 0..count {
 207                                                         scid += 1;
 208                                                         let rnid = node_pks.iter().skip(slice_to_be16(get_slice!(2))as usize % node_pks.len()).next().unwrap();
 209                                                         first_hops_vec.push(ChannelDetails {
 210                                                                 channel_id: [0; 32],
 211                                                                 counterparty: ChannelCounterparty {
 212                                                                         node_id: *rnid,
 213                                                                         features: InitFeatures::known(),
 214                                                                         unspendable_punishment_reserve: 0,
 215                                                                         forwarding_info: None,
 216                                                                 },
 217                                                                 funding_txo: Some(OutPoint { txid: bitcoin::Txid::from_slice(&[0; 32]).unwrap(), index: 0 }),
 218                                                                 channel_type: None,
 219                                                                 short_channel_id: Some(scid),
 220                                                                 inbound_scid_alias: None,
 221                                                                 channel_value_satoshis: slice_to_be64(get_slice!(8)),
 222                                                                 user_channel_id: 0, inbound_capacity_msat: 0,
 223                                                                 unspendable_punishment_reserve: None,
 224                                                                 confirmations_required: None,
 225                                                                 force_close_spend_delay: None,
 226                                                                 is_outbound: true, is_funding_locked: true,
 227                                                                 is_usable: true, is_public: true,
 228                                                                 balance_msat: 0,
 229                                                                 outbound_capacity_msat: 0,
 230                                                         });
 231                                                 }
 232                                                 Some(&first_hops_vec[..])
 233                                         },
 234                                 };
 235                                 let mut last_hops = Vec::new();
 236                                 {
 237                                         let count = get_slice!(1)[0];
 238                                         for _ in 0..count {
 239                                                 scid += 1;
 240                                                 let rnid = node_pks.iter().skip(slice_to_be16(get_slice!(2))as usize % node_pks.len()).next().unwrap();
 241                                                 last_hops.push(RouteHint(vec![RouteHintHop {
 242                                                         src_node_id: *rnid,
 243                                                         short_channel_id: scid,
 244                                                         fees: RoutingFees {
 245                                                                 base_msat: slice_to_be32(get_slice!(4)),
 246                                                                 proportional_millionths: slice_to_be32(get_slice!(4)),
 247                                                         },
 248                                                         cltv_expiry_delta: slice_to_be16(get_slice!(2)),
 249                                                         htlc_minimum_msat: Some(slice_to_be64(get_slice!(8))),
 250                                                         htlc_maximum_msat: None,
 251                                                 }]));
 252                                         }
 253                                 }
 254                                 let scorer = FixedPenaltyScorer::with_penalty(0);
 255                                 let random_seed_bytes: [u8; 32] = [get_slice!(1)[0]; 32];
 256                                 for target in node_pks.iter() {
 257                                         let route_params = RouteParameters {
 258                                                 payment_params: PaymentParameters::from_node_id(*target).with_route_hints(last_hops.clone()),
 259                                                 final_value_msat: slice_to_be64(get_slice!(8)),
 260                                                 final_cltv_expiry_delta: slice_to_be32(get_slice!(4)),
 261                                         };
 262                                         let _ = find_route(&our_pubkey, &route_params, &net_graph,
 263                                                 first_hops.map(|c| c.iter().collect::<Vec<_>>()).as_ref().map(|a| a.as_slice()),
 264                                                 Arc::clone(&logger), &scorer, &random_seed_bytes);
 265                                 }
 266                         },
 267                 }
 268         }
 269 }
 270
 271 pub fn router_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 272         do_test(data, out);
 273 }
 274
 275 #[no_mangle]
 276 pub extern "C" fn router_run(data: *const u8, datalen: usize) {
 277         do_test(unsafe { std::slice::from_raw_parts(data, datalen) }, test_logger::DevNull {});
 278 }