Onion messages: fix edge case where we are the introduction node

[rust-lightning] / lightning / src / onion_message / functional_tests.rs

diff --git a/lightning/src/onion_message/functional_tests.rs b/lightning/src/onion_message/functional_tests.rs
index 356e1f3cdafafe6fec5d25bcaeada4da7bc5cedc..991f0d1c2650ab172a1d5e7c0bffb712f5b089c1 100644 (file)
--- a/lightning/src/onion_message/functional_tests.rs
+++ b/lightning/src/onion_message/functional_tests.rs
@@ -9,19 +9,19 @@
 
 //! Onion message testing and test utilities live here.
 
-use chain::keysinterface::{KeysInterface, Recipient};
-use ln::features::InitFeatures;
-use ln::msgs::{self, DecodeError, OnionMessageHandler};
+use crate::chain::keysinterface::{KeysInterface, Recipient};
+use crate::ln::features::InitFeatures;
+use crate::ln::msgs::{self, DecodeError, OnionMessageHandler};
 use super::{BlindedRoute, CustomOnionMessageContents, CustomOnionMessageHandler, Destination, OnionMessageContents, OnionMessenger, SendError};
-use util::enforcing_trait_impls::EnforcingSigner;
-use util::ser::{MaybeReadableArgs, Writeable, Writer};
-use util::test_utils;
+use crate::util::enforcing_trait_impls::EnforcingSigner;
+use crate::util::ser::{MaybeReadableArgs, Writeable, Writer};
+use crate::util::test_utils;
 
 use bitcoin::network::constants::Network;
 use bitcoin::secp256k1::{PublicKey, Secp256k1};
 
-use io;
-use sync::Arc;
+use crate::io;
+use crate::sync::Arc;
 
 struct MessengerNode {
        keys_manager: Arc<test_utils::TestKeysInterface>,
@@ -170,6 +170,20 @@ fn too_big_packet_error() {
        assert_eq!(err, SendError::TooBigPacket);
 }
 
+#[test]
+fn we_are_intro_node() {
+       // If we are sending straight to a blinded route and we are the introduction node, we need to
+       // advance the blinded route by 1 hop so the second hop is the new introduction node.
+       let nodes = create_nodes(3);
+       let test_msg = TestCustomMessage {};
+
+       let secp_ctx = Secp256k1::new();
+       let blinded_route = BlindedRoute::new(&[nodes[0].get_node_pk(), nodes[1].get_node_pk(), nodes[2].get_node_pk()], &*nodes[2].keys_manager, &secp_ctx).unwrap();
+
+       nodes[0].messenger.send_onion_message(&[], Destination::BlindedRoute(blinded_route), OnionMessageContents::Custom(test_msg.clone()), None).unwrap();
+       pass_along_path(&nodes, None);
+}
+
 #[test]
 fn invalid_blinded_route_error() {
        // Make sure we error as expected if a provided blinded route has 0 or 1 hops.
@@ -217,6 +231,33 @@ fn reply_path() {
                format!("Received an onion message with path_id None and a reply_path").to_string(), 2);
 }
 
+#[test]
+fn invalid_custom_message_type() {
+       let nodes = create_nodes(2);
+
+       struct InvalidCustomMessage{}
+       impl CustomOnionMessageContents for InvalidCustomMessage {
+               fn tlv_type(&self) -> u64 {
+                       // Onion message contents must have a TLV >= 64.
+                       63
+               }
+       }
+
+       impl Writeable for InvalidCustomMessage {
+               fn write<W: Writer>(&self, _w: &mut W) -> Result<(), io::Error> { unreachable!() }
+       }
+
+       impl MaybeReadableArgs<u64> for InvalidCustomMessage {
+               fn read<R: io::Read>(_buffer: &mut R, _message_type: u64) -> Result<Option<Self>, DecodeError> where Self: Sized {
+                       unreachable!()
+               }
+       }
+
+       let test_msg = OnionMessageContents::Custom(InvalidCustomMessage {});
+       let err = nodes[0].messenger.send_onion_message(&[], Destination::Node(nodes[1].get_node_pk()), test_msg, None).unwrap_err();
+       assert_eq!(err, SendError::InvalidMessage);
+}
+
 #[test]
 fn peer_buffer_full() {
        let nodes = create_nodes(2);