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