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refactor(libp2p): use precise connection cleanup in handshake error handling #5330

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Merged
gacevicljubisa merged 6 commits into from
Jul 11, 2026
+10 −9
Merged

refactor(libp2p): use precise connection cleanup in handshake error handling #5330

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bb6cb0e
refactor(libp2p): use precise connection cleanup in handshake error h…
gacevicljubisa Jan 24, 2026
7d87357
Merge remote-tracking branch 'origin/master' into refactor/precise-co…
gacevicljubisa Mar 10, 2026
8bce5c0
Merge remote-tracking branch 'origin' into refactor/precise-connectio…
gacevicljubisa Mar 18, 2026
2181c5d
fix(p2p/libp2p): close only failing connection in handleIncoming mult…
gacevicljubisa Mar 18, 2026
0a58335
Merge remote-tracking branch 'origin/master' into refactor/precise-co…
gacevicljubisa Jul 7, 2026
d9fb6b9
fix(libp2p): close only failing connection in Connect multiaddr fallback
gacevicljubisa Jul 7, 2026
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19 changes: 10 additions & 9 deletions pkg/p2p/libp2p/libp2p.go
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Original file line number Diff line number Diff line change
Expand Up @@ -607,7 +607,7 @@ func (s *Service) handleIncoming(stream network.Stream) {
s.logger.Debug("stream handler: handshake: build remote multiaddrs", "peer_id", peerID, "error", err)
s.logger.Error(nil, "stream handler: handshake: build remote multiaddrs", "peer_id", peerID)
_ = handshakeStream.Reset()
_ = s.host.Network().ClosePeer(peerID)
_ = stream.Conn().Close()
return
}

Expand All @@ -622,7 +622,7 @@ func (s *Service) handleIncoming(stream network.Stream) {
s.logger.Debug("stream handler: handshake: build remote multiaddrs fallback", "peer_id", peerID, "error", err)
s.logger.Error(nil, "stream handler: handshake: build remote multiaddrs fallback", "peer_id", peerID)
_ = handshakeStream.Reset()
_ = s.host.Network().ClosePeer(peerID)
_ = stream.Conn().Close()
return
}
}
Expand All @@ -636,7 +636,7 @@ func (s *Service) handleIncoming(stream network.Stream) {
s.logger.Debug("stream handler: handshake: handle failed", "peer_id", peerID, "error", err)
s.logger.Error(nil, "stream handler: handshake: handle failed", "peer_id", peerID)
_ = handshakeStream.Reset()
_ = s.host.Network().ClosePeer(peerID)
_ = stream.Conn().Close()
return
}

Expand Down Expand Up @@ -1121,7 +1121,7 @@ func (s *Service) Connect(ctx context.Context, addrs []ma.Multiaddr) (address *b
peerAddrs, err := s.peerMultiaddrs(ctx, peerID)
if err != nil {
_ = handshakeStream.Reset()
_ = s.host.Network().ClosePeer(peerID)
_ = stream.Conn().Close()
return nil, fmt.Errorf("build peer multiaddrs: %w", err)
}

Expand All @@ -1130,7 +1130,7 @@ func (s *Service) Connect(ctx context.Context, addrs []ma.Multiaddr) (address *b
observedAddrs, err = buildFullMAs([]ma.Multiaddr{stream.Conn().RemoteMultiaddr()}, peerID)
if err != nil {
_ = handshakeStream.Reset()
_ = s.host.Network().ClosePeer(peerID)
_ = stream.Conn().Close()
return nil, fmt.Errorf("build peer multiaddrs fallback: %w", err)
}
}
Expand All @@ -1142,13 +1142,13 @@ func (s *Service) Connect(ctx context.Context, addrs []ma.Multiaddr) (address *b
)
if err != nil {
_ = handshakeStream.Reset()
_ = s.host.Network().ClosePeer(info.ID)
_ = stream.Conn().Close()
return nil, fmt.Errorf("handshake: %w", err)
}

if !i.FullNode {
_ = handshakeStream.Reset()
_ = s.host.Network().ClosePeer(info.ID)
_ = stream.Conn().Close()
return nil, p2p.ErrDialLightNode
}

Expand All @@ -1159,7 +1159,7 @@ func (s *Service) Connect(ctx context.Context, addrs []ma.Multiaddr) (address *b
s.logger.Debug("blocklisting: exists failed", "peer_id", info.ID, "error", err)
s.logger.Error(nil, "internal error while connecting with peer", "peer_id", info.ID)
_ = handshakeStream.Reset()
_ = s.host.Network().ClosePeer(info.ID)
_ = stream.Conn().Close()
return nil, err
}

Expand All @@ -1172,7 +1172,8 @@ func (s *Service) Connect(ctx context.Context, addrs []ma.Multiaddr) (address *b

if exists := s.peers.addIfNotExists(stream.Conn(), overlay, i.FullNode); exists {
if err := handshakeStream.FullClose(); err != nil {
_ = s.Disconnect(overlay, "failed closing handshake stream after connect")
// Only close the new (duplicate) connection; keep existing healthy sessions intact.
_ = stream.Conn().Close()
return nil, fmt.Errorf("peer exists, full close: %w", err)
}

Expand Down
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