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p2p: fix disconnect at capacity

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With the introduction of static/trusted nodes, the peer count
can go above MaxPeers. Update the capacity check to handle this.
While here, decouple the trusted nodes check from the handshake
by passing a function instead.
This commit is contained in:
Felix Lange
2015-05-08 15:54:35 +02:00
parent 23454dcfcb
commit 914e57e49b
4 changed files with 46 additions and 33 deletions
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24
p2p/handshake.go
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@ -65,26 +65,26 @@ type protoHandshake struct {
ID discover.NodeID
}
// setupConn starts a protocol session on the given connection.
// It runs the encryption handshake and the protocol handshake.
// If dial is non-nil, the connection the local node is the initiator.
// If atcap is true, the connection will be disconnected with DiscTooManyPeers
// after the key exchange.
func setupConn(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, dial *discover.Node, atcap bool, trusted map[discover.NodeID]bool) (*conn, error) {
// setupConn starts a protocol session on the given connection. It
// runs the encryption handshake and the protocol handshake. If dial
// is non-nil, the connection the local node is the initiator. If
// keepconn returns false, the connection will be disconnected with
// DiscTooManyPeers after the key exchange.
func setupConn(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, dial *discover.Node, keepconn func(discover.NodeID) bool) (*conn, error) {
if dial == nil {
return setupInboundConn(fd, prv, our, atcap, trusted)
return setupInboundConn(fd, prv, our, keepconn)
} else {
return setupOutboundConn(fd, prv, our, dial, atcap, trusted)
return setupOutboundConn(fd, prv, our, dial, keepconn)
}
}
func setupInboundConn(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, atcap bool, trusted map[discover.NodeID]bool) (*conn, error) {
func setupInboundConn(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, keepconn func(discover.NodeID) bool) (*conn, error) {
secrets, err := receiverEncHandshake(fd, prv, nil)
if err != nil {
return nil, fmt.Errorf("encryption handshake failed: %v", err)
}
rw := newRlpxFrameRW(fd, secrets)
if atcap && !trusted[secrets.RemoteID] {
if !keepconn(secrets.RemoteID) {
SendItems(rw, discMsg, DiscTooManyPeers)
return nil, errors.New("we have too many peers")
}
@ -99,13 +99,13 @@ func setupInboundConn(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, a
return &conn{rw, rhs}, nil
}
func setupOutboundConn(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, dial *discover.Node, atcap bool, trusted map[discover.NodeID]bool) (*conn, error) {
func setupOutboundConn(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, dial *discover.Node, keepconn func(discover.NodeID) bool) (*conn, error) {
secrets, err := initiatorEncHandshake(fd, prv, dial.ID, nil)
if err != nil {
return nil, fmt.Errorf("encryption handshake failed: %v", err)
}
rw := newRlpxFrameRW(fd, secrets)
if atcap && !trusted[secrets.RemoteID] {
if !keepconn(secrets.RemoteID) {
SendItems(rw, discMsg, DiscTooManyPeers)
return nil, errors.New("we have too many peers")
}