// SendNewBlock propagates an entire block to a remote peer.
func (p *peer) SendNewBlock(block *types.Block, td *big.Int) error {
propBlockOutPacketsMeter.Mark(1)
propBlockOutTrafficMeter.Mark(block.Size().Int64())
p.knownBlocks.Add(block.Hash())
return p2p.Send(p.rw, NewBlockMsg, []interface{}{block, td})
}
// SendBlocks sends a batch of blocks to the remote peer.
func (p *peer) SendBlocks(blocks []*types.Block) error {
reqBlockOutPacketsMeter.Mark(1)
for _, block := range blocks {
reqBlockOutTrafficMeter.Mark(block.Size().Int64())
}
return p2p.Send(p.rw, BlocksMsg, blocks)
}
// SendTransactions sends transactions to the peer and includes the hashes
// in its transaction hash set for future reference.
func (p *peer) SendTransactions(txs types.Transactions) error {
propTxnOutPacketsMeter.Mark(1)
for _, tx := range txs {
propTxnOutTrafficMeter.Mark(tx.Size().Int64())
p.knownTxs.Add(tx.Hash())
}
return p2p.Send(p.rw, TxMsg, txs)
}
// SendNewBlockHashes announces the availability of a number of blocks through
// a hash notification.
func (p *peer) SendNewBlockHashes(hashes []common.Hash) error {
propHashOutPacketsMeter.Mark(1)
propHashOutTrafficMeter.Mark(int64(32 * len(hashes)))
for _, hash := range hashes {
p.knownBlocks.Add(hash)
}
return p2p.Send(p.rw, NewBlockHashesMsg, hashes)
}
func TestPeerDeliver(t *testing.T) {
// Start a tester and execute the handshake
tester, err := startTestPeerInited()
if err != nil {
t.Fatalf("failed to start initialized peer: %v", err)
}
defer tester.stream.Close()
// Watch for all inbound messages
arrived := make(chan struct{}, 1)
tester.client.Watch(Filter{
Fn: func(message *Message) {
arrived <- struct{}{}
},
})
// Construct a message and deliver it to the tester peer
message := NewMessage([]byte("peer broadcast test message"))
envelope, err := message.Wrap(DefaultPoW, Options{
TTL: DefaultTTL,
})
if err != nil {
t.Fatalf("failed to wrap message: %v", err)
}
if err := p2p.Send(tester.stream, messagesCode, []*Envelope{envelope}); err != nil {
t.Fatalf("failed to transfer message: %v", err)
}
// Check that the message is delivered upstream
select {
case <-arrived:
case <-time.After(time.Second):
t.Fatalf("message delivery timeout")
}
// Check that a resend is not delivered
if err := p2p.Send(tester.stream, messagesCode, []*Envelope{envelope}); err != nil {
t.Fatalf("failed to transfer message: %v", err)
}
select {
case <-time.After(2 * transmissionCycle):
case <-arrived:
t.Fatalf("repeating message arrived")
}
}
func (p *testPeer) handshake(t *testing.T) {
td, currentBlock, genesis := p.pm.chainman.Status()
msg := &statusData{
ProtocolVersion: uint32(p.pm.protVer),
NetworkId: uint32(p.pm.netId),
TD: td,
CurrentBlock: currentBlock,
GenesisBlock: genesis,
}
if err := p2p.ExpectMsg(p, StatusMsg, msg); err != nil {
t.Fatalf("status recv: %v", err)
}
if err := p2p.Send(p, StatusMsg, msg); err != nil {
t.Fatalf("status send: %v", err)
}
}
func TestStatusMsgErrors(t *testing.T) {
pm := newProtocolManagerForTesting(nil)
td, currentBlock, genesis := pm.chainman.Status()
defer pm.Stop()
tests := []struct {
code uint64
data interface{}
wantError error
}{
{
code: TxMsg, data: []interface{}{},
wantError: errResp(ErrNoStatusMsg, "first msg has code 2 (!= 0)"),
},
{
code: StatusMsg, data: statusData{10, NetworkId, td, currentBlock, genesis},
wantError: errResp(ErrProtocolVersionMismatch, "10 (!= 0)"),
},
{
code: StatusMsg, data: statusData{uint32(ProtocolVersions[0]), 999, td, currentBlock, genesis},
wantError: errResp(ErrNetworkIdMismatch, "999 (!= 1)"),
},
{
code: StatusMsg, data: statusData{uint32(ProtocolVersions[0]), NetworkId, td, currentBlock, common.Hash{3}},
wantError: errResp(ErrGenesisBlockMismatch, "0300000000000000000000000000000000000000000000000000000000000000 (!= %x)", genesis),
},
}
for i, test := range tests {
p, errc := newTestPeer(pm)
// The send call might hang until reset because
// the protocol might not read the payload.
go p2p.Send(p, test.code, test.data)
select {
case err := <-errc:
if err == nil {
t.Errorf("test %d: protocol returned nil error, want %q", test.wantError)
} else if err.Error() != test.wantError.Error() {
t.Errorf("test %d: wrong error: got %q, want %q", i, err, test.wantError)
}
case <-time.After(2 * time.Second):
t.Errorf("protocol did not shut down withing 2 seconds")
}
p.close()
}
}
// broadcast iterates over the collection of envelopes and transmits yet unknown
// ones over the network.
func (self *peer) broadcast() error {
// Fetch the envelopes and collect the unknown ones
envelopes := self.host.envelopes()
transmit := make([]*Envelope, 0, len(envelopes))
for _, envelope := range envelopes {
if !self.marked(envelope) {
transmit = append(transmit, envelope)
self.mark(envelope)
}
}
// Transmit the unknown batch (potentially empty)
if err := p2p.Send(self.ws, messagesCode, transmit); err != nil {
return err
}
glog.V(logger.Detail).Infoln(self.peer, "broadcasted", len(transmit), "message(s)")
return nil
}
// Handshake executes the eth protocol handshake, negotiating version number,
// network IDs, difficulties, head and genesis blocks.
func (p *peer) Handshake(td *big.Int, head common.Hash, genesis common.Hash) error {
// Send out own handshake in a new thread
errc := make(chan error, 1)
go func() {
errc <- p2p.Send(p.rw, StatusMsg, &statusData{
ProtocolVersion: uint32(p.version),
NetworkId: uint32(p.network),
TD: td,
CurrentBlock: head,
GenesisBlock: genesis,
})
}()
// In the mean time retrieve the remote status message
msg, err := p.rw.ReadMsg()
if err != nil {
return err
}
if msg.Code != StatusMsg {
return errResp(ErrNoStatusMsg, "first msg has code %x (!= %x)", msg.Code, StatusMsg)
}
if msg.Size > ProtocolMaxMsgSize {
return errResp(ErrMsgTooLarge, "%v > %v", msg.Size, ProtocolMaxMsgSize)
}
// Decode the handshake and make sure everything matches
var status statusData
if err := msg.Decode(&status); err != nil {
return errResp(ErrDecode, "msg %v: %v", msg, err)
}
if status.GenesisBlock != genesis {
return errResp(ErrGenesisBlockMismatch, "%x (!= %x)", status.GenesisBlock, genesis)
}
if int(status.NetworkId) != p.network {
return errResp(ErrNetworkIdMismatch, "%d (!= %d)", status.NetworkId, p.network)
}
if int(status.ProtocolVersion) != p.version {
return errResp(ErrProtocolVersionMismatch, "%d (!= %d)", status.ProtocolVersion, p.version)
}
// Configure the remote peer, and sanity check out handshake too
p.td, p.head = status.TD, status.CurrentBlock
return <-errc
}
// This test checks that received transactions are added to the local pool.
func TestRecvTransactions(t *testing.T) {
txAdded := make(chan []*types.Transaction)
pm := newProtocolManagerForTesting(txAdded)
p, _ := newTestPeer(pm)
defer pm.Stop()
defer p.close()
p.handshake(t)
tx := newtx(testAccount, 0, 0)
if err := p2p.Send(p, TxMsg, []interface{}{tx}); err != nil {
t.Fatalf("send error: %v", err)
}
select {
case added := <-txAdded:
if len(added) != 1 {
t.Errorf("wrong number of added transactions: got %d, want 1", len(added))
} else if added[0].Hash() != tx.Hash() {
t.Errorf("added wrong tx hash: got %v, want %v", added[0].Hash(), tx.Hash())
}
case <-time.After(2 * time.Second):
t.Errorf("no TxPreEvent received within 2 seconds")
}
}
// RequestBlocks fetches a batch of blocks corresponding to the specified hashes.
func (p *peer) RequestBlocks(hashes []common.Hash) error {
glog.V(logger.Debug).Infof("[%s] fetching %v blocks\n", p.id, len(hashes))
return p2p.Send(p.rw, GetBlocksMsg, hashes)
}
// RequestHashesFromNumber fetches a batch of hashes from a peer, starting at the
// requested block number, going upwards towards the genesis block.
func (p *peer) RequestHashesFromNumber(from uint64, count int) error {
glog.V(logger.Debug).Infof("Peer [%s] fetching hashes (%d) from #%d...\n", p.id, count, from)
return p2p.Send(p.rw, GetBlockHashesFromNumberMsg, getBlockHashesFromNumberData{from, uint64(count)})
}
// RequestHashes fetches a batch of hashes from a peer, starting at from, going
// towards the genesis block.
func (p *peer) RequestHashes(from common.Hash) error {
glog.V(logger.Debug).Infof("Peer [%s] fetching hashes (%d) from %x...\n", p.id, downloader.MaxHashFetch, from[:4])
return p2p.Send(p.rw, GetBlockHashesMsg, getBlockHashesData{from, uint64(downloader.MaxHashFetch)})
}
// SendBlockHashes sends a batch of known hashes to the remote peer.
func (p *peer) SendBlockHashes(hashes []common.Hash) error {
reqHashOutPacketsMeter.Mark(1)
reqHashOutTrafficMeter.Mark(int64(32 * len(hashes)))
return p2p.Send(p.rw, BlockHashesMsg, hashes)
}