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authorPéter Szilágyi <peterke@gmail.com>2015-05-04 18:59:51 +0800
committerPéter Szilágyi <peterke@gmail.com>2015-05-04 18:59:51 +0800
commit4accc187d5cf6a100d6c10c0e0f35780f52871a0 (patch)
treea106654ceccede0c8bcd1fb9402c4eec16bbb6e8
parent2382da4179fa290582523f598e1be78469cdf274 (diff)
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eth, p2p: add trusted node list beside static list
-rw-r--r--eth/backend.go24
-rw-r--r--p2p/handshake.go14
-rw-r--r--p2p/handshake_test.go4
-rw-r--r--p2p/server.go32
-rw-r--r--p2p/server_test.go36
5 files changed, 59 insertions, 51 deletions
diff --git a/eth/backend.go b/eth/backend.go
index 8aecfba5b..983dd8e4f 100644
--- a/eth/backend.go
+++ b/eth/backend.go
@@ -41,8 +41,8 @@ var (
discover.MustParseNode("enode://487611428e6c99a11a9795a6abe7b529e81315ca6aad66e2a2fc76e3adf263faba0d35466c2f8f68d561dbefa8878d4df5f1f2ddb1fbeab7f42ffb8cd328bd4a@5.1.83.226:30303"),
}
- // Path within <datadir> to search for the static node list
- staticNodes = "static-nodes.json"
+ staticNodes = "static-nodes.json" // Path within <datadir> to search for the static node list
+ trustedNodes = "trusted-nodes.json" // Path within <datadir> to search for the trusted node list
)
type Config struct {
@@ -102,23 +102,22 @@ func (cfg *Config) parseBootNodes() []*discover.Node {
return ns
}
-// parseStaticNodes parses a list of discovery node URLs either given literally,
-// or loaded from a .json file.
-func (cfg *Config) parseStaticNodes() []*discover.Node {
- // Short circuit if no static node config is present
- path := filepath.Join(cfg.DataDir, staticNodes)
+// parseNodes parses a list of discovery node URLs loaded from a .json file.
+func (cfg *Config) parseNodes(file string) []*discover.Node {
+ // Short circuit if no node config is present
+ path := filepath.Join(cfg.DataDir, file)
if _, err := os.Stat(path); err != nil {
return nil
}
- // Load the static nodes from the config file
+ // Load the nodes from the config file
blob, err := ioutil.ReadFile(path)
if err != nil {
- glog.V(logger.Error).Infof("Failed to access static nodes: %v", err)
+ glog.V(logger.Error).Infof("Failed to access nodes: %v", err)
return nil
}
nodelist := []string{}
if err := json.Unmarshal(blob, &nodelist); err != nil {
- glog.V(logger.Error).Infof("Failed to load static nodes: %v", err)
+ glog.V(logger.Error).Infof("Failed to load nodes: %v", err)
return nil
}
// Interpret the list as a discovery node array
@@ -129,7 +128,7 @@ func (cfg *Config) parseStaticNodes() []*discover.Node {
}
node, err := discover.ParseNode(url)
if err != nil {
- glog.V(logger.Error).Infof("Static node URL %s: %v\n", url, err)
+ glog.V(logger.Error).Infof("Node URL %s: %v\n", url, err)
continue
}
nodes = append(nodes, node)
@@ -288,7 +287,8 @@ func New(config *Config) (*Ethereum, error) {
NAT: config.NAT,
NoDial: !config.Dial,
BootstrapNodes: config.parseBootNodes(),
- StaticNodes: config.parseStaticNodes(),
+ StaticNodes: config.parseNodes(staticNodes),
+ TrustedNodes: config.parseNodes(trustedNodes),
NodeDatabase: nodeDb,
}
if len(config.Port) > 0 {
diff --git a/p2p/handshake.go b/p2p/handshake.go
index 79395f23f..8e611cfd5 100644
--- a/p2p/handshake.go
+++ b/p2p/handshake.go
@@ -70,21 +70,21 @@ type protoHandshake struct {
// 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) (*conn, error) {
+func setupConn(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, dial *discover.Node, atcap bool, trusted map[discover.NodeID]bool) (*conn, error) {
if dial == nil {
- return setupInboundConn(fd, prv, our, atcap)
+ return setupInboundConn(fd, prv, our, atcap, trusted)
} else {
- return setupOutboundConn(fd, prv, our, dial, atcap)
+ return setupOutboundConn(fd, prv, our, dial, atcap, trusted)
}
}
-func setupInboundConn(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, atcap bool) (*conn, error) {
+func setupInboundConn(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, atcap bool, trusted map[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 {
+ if atcap && !trusted[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) (*conn, error) {
+func setupOutboundConn(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, dial *discover.Node, atcap bool, trusted map[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 {
+ if atcap && !trusted[secrets.RemoteID] {
SendItems(rw, discMsg, DiscTooManyPeers)
return nil, errors.New("we have too many peers")
}
diff --git a/p2p/handshake_test.go b/p2p/handshake_test.go
index c22af7a9c..5e63e5c39 100644
--- a/p2p/handshake_test.go
+++ b/p2p/handshake_test.go
@@ -143,7 +143,7 @@ func TestSetupConn(t *testing.T) {
done := make(chan struct{})
go func() {
defer close(done)
- conn0, err := setupConn(fd0, prv0, hs0, node1, false)
+ conn0, err := setupConn(fd0, prv0, hs0, node1, false, nil)
if err != nil {
t.Errorf("outbound side error: %v", err)
return
@@ -156,7 +156,7 @@ func TestSetupConn(t *testing.T) {
}
}()
- conn1, err := setupConn(fd1, prv1, hs1, nil, false)
+ conn1, err := setupConn(fd1, prv1, hs1, nil, false, nil)
if err != nil {
t.Fatalf("inbound side error: %v", err)
}
diff --git a/p2p/server.go b/p2p/server.go
index 3099190b6..959d61284 100644
--- a/p2p/server.go
+++ b/p2p/server.go
@@ -64,6 +64,10 @@ type Server struct {
// maintained and re-connected on disconnects.
StaticNodes []*discover.Node
+ // Trusted nodes are used as pre-configured connections which are always
+ // allowed to connect, even above the peer limit.
+ TrustedNodes []*discover.Node
+
// NodeDatabase is the path to the database containing the previously seen
// live nodes in the network.
NodeDatabase string
@@ -100,12 +104,13 @@ type Server struct {
ourHandshake *protoHandshake
- lock sync.RWMutex // protects running, peers and the trust fields
- running bool
- peers map[discover.NodeID]*Peer
- staticNodes map[discover.NodeID]*discover.Node // Map of currently maintained static remote nodes
- staticDial chan *discover.Node // Dial request channel reserved for the static nodes
- staticCycle time.Duration // Overrides staticPeerCheckInterval, used for testing
+ lock sync.RWMutex // protects running, peers and the trust fields
+ running bool
+ peers map[discover.NodeID]*Peer
+ staticNodes map[discover.NodeID]*discover.Node // Map of currently maintained static remote nodes
+ staticDial chan *discover.Node // Dial request channel reserved for the static nodes
+ staticCycle time.Duration // Overrides staticPeerCheckInterval, used for testing
+ trustedNodes map[discover.NodeID]bool // Set of currently trusted remote nodes
ntab *discover.Table
listener net.Listener
@@ -115,7 +120,7 @@ type Server struct {
peerWG sync.WaitGroup // active peer goroutines
}
-type setupFunc func(net.Conn, *ecdsa.PrivateKey, *protoHandshake, *discover.Node, bool) (*conn, error)
+type setupFunc func(net.Conn, *ecdsa.PrivateKey, *protoHandshake, *discover.Node, bool, map[discover.NodeID]bool) (*conn, error)
type newPeerHook func(*Peer)
// Peers returns all connected peers.
@@ -207,7 +212,11 @@ func (srv *Server) Start() (err error) {
srv.quit = make(chan struct{})
srv.peers = make(map[discover.NodeID]*Peer)
- // Create the current trust map, and the associated dialing channel
+ // Create the current trust maps, and the associated dialing channel
+ srv.trustedNodes = make(map[discover.NodeID]bool)
+ for _, node := range srv.TrustedNodes {
+ srv.trustedNodes[node.ID] = true
+ }
srv.staticNodes = make(map[discover.NodeID]*discover.Node)
for _, node := range srv.StaticNodes {
srv.staticNodes[node.ID] = node
@@ -486,7 +495,7 @@ func (srv *Server) startPeer(fd net.Conn, dest *discover.Node) {
}
srv.lock.RUnlock()
- conn, err := srv.setupFunc(fd, srv.PrivateKey, srv.ourHandshake, dest, atcap)
+ conn, err := srv.setupFunc(fd, srv.PrivateKey, srv.ourHandshake, dest, atcap, srv.trustedNodes)
if err != nil {
fd.Close()
glog.V(logger.Debug).Infof("Handshake with %v failed: %v", fd.RemoteAddr(), err)
@@ -542,14 +551,15 @@ func (srv *Server) addPeer(id discover.NodeID, p *Peer) (bool, DiscReason) {
// checkPeer verifies whether a peer looks promising and should be allowed/kept
// in the pool, or if it's of no use.
func (srv *Server) checkPeer(id discover.NodeID) (bool, DiscReason) {
- // First up, figure out if the peer is static
+ // First up, figure out if the peer is static or trusted
_, static := srv.staticNodes[id]
+ trusted := srv.trustedNodes[id]
// Make sure the peer passes all required checks
switch {
case !srv.running:
return false, DiscQuitting
- case !static && len(srv.peers) >= srv.MaxPeers:
+ case !static && !trusted && len(srv.peers) >= srv.MaxPeers:
return false, DiscTooManyPeers
case srv.peers[id] != nil:
return false, DiscAlreadyConnected
diff --git a/p2p/server_test.go b/p2p/server_test.go
index 606fa9386..5ee9c5ceb 100644
--- a/p2p/server_test.go
+++ b/p2p/server_test.go
@@ -22,7 +22,7 @@ func startTestServer(t *testing.T, pf newPeerHook) *Server {
ListenAddr: "127.0.0.1:0",
PrivateKey: newkey(),
newPeerHook: pf,
- setupFunc: func(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, dial *discover.Node, atcap bool) (*conn, error) {
+ setupFunc: func(fd net.Conn, prv *ecdsa.PrivateKey, our *protoHandshake, dial *discover.Node, atcap bool, trusted map[discover.NodeID]bool) (*conn, error) {
id := randomID()
rw := newRlpxFrameRW(fd, secrets{
MAC: zero16,
@@ -200,7 +200,7 @@ func TestServerDisconnectAtCap(t *testing.T) {
// Run the handshakes just like a real peer would.
key := newkey()
hs := &protoHandshake{Version: baseProtocolVersion, ID: discover.PubkeyID(&key.PublicKey)}
- _, err = setupConn(conn, key, hs, srv.Self(), false)
+ _, err = setupConn(conn, key, hs, srv.Self(), false, srv.trustedNodes)
if i == nconns-1 {
// When handling the last connection, the server should
// disconnect immediately instead of running the protocol
@@ -250,7 +250,7 @@ func TestServerStaticPeers(t *testing.T) {
// Run the handshakes just like a real peer would, and wait for completion
key := newkey()
shake := &protoHandshake{Version: baseProtocolVersion, ID: discover.PubkeyID(&key.PublicKey)}
- if _, err = setupConn(conn, key, shake, server.Self(), false); err != nil {
+ if _, err = setupConn(conn, key, shake, server.Self(), false, server.trustedNodes); err != nil {
t.Fatalf("conn %d: unexpected error: %v", i, err)
}
<-started
@@ -307,19 +307,24 @@ func TestServerStaticPeers(t *testing.T) {
}
}
-/*
// Tests that trusted peers and can connect above max peer caps.
func TestServerTrustedPeers(t *testing.T) {
defer testlog(t).detach()
+ // Create a trusted peer to accept connections from
+ key := newkey()
+ trusted := &discover.Node{
+ ID: discover.PubkeyID(&key.PublicKey),
+ }
// Create a test server with limited connection slots
started := make(chan *Peer)
server := &Server{
- ListenAddr: "127.0.0.1:0",
- PrivateKey: newkey(),
- MaxPeers: 3,
- NoDial: true,
- newPeerHook: func(p *Peer) { started <- p },
+ ListenAddr: "127.0.0.1:0",
+ PrivateKey: newkey(),
+ MaxPeers: 3,
+ NoDial: true,
+ TrustedNodes: []*discover.Node{trusted},
+ newPeerHook: func(p *Peer) { started <- p },
}
if err := server.Start(); err != nil {
t.Fatal(err)
@@ -339,18 +344,12 @@ func TestServerTrustedPeers(t *testing.T) {
// Run the handshakes just like a real peer would, and wait for completion
key := newkey()
shake := &protoHandshake{Version: baseProtocolVersion, ID: discover.PubkeyID(&key.PublicKey)}
- if _, err = setupConn(conn, key, shake, server.Self(), false); err != nil {
+ if _, err = setupConn(conn, key, shake, server.Self(), false, server.trustedNodes); err != nil {
t.Fatalf("conn %d: unexpected error: %v", i, err)
}
<-started
}
- // Inject a trusted node and dial that (we'll connect from this end, don't need IP setup)
- key := newkey()
- trusted := &discover.Node{
- ID: discover.PubkeyID(&key.PublicKey),
- }
- server.AddPeer(trusted)
-
+ // Dial from the trusted peer, ensure connection is accepted
conn, err := dialer.Dial("tcp", server.ListenAddr)
if err != nil {
t.Fatalf("trusted node: dial error: %v", err)
@@ -358,7 +357,7 @@ func TestServerTrustedPeers(t *testing.T) {
defer conn.Close()
shake := &protoHandshake{Version: baseProtocolVersion, ID: trusted.ID}
- if _, err = setupConn(conn, key, shake, server.Self(), false); err != nil {
+ if _, err = setupConn(conn, key, shake, server.Self(), false, server.trustedNodes); err != nil {
t.Fatalf("trusted node: unexpected error: %v", err)
}
select {
@@ -369,7 +368,6 @@ func TestServerTrustedPeers(t *testing.T) {
t.Fatalf("trusted node timeout")
}
}
-*/
func newkey() *ecdsa.PrivateKey {
key, err := crypto.GenerateKey()