예제 #1
0
파일: peer.go 프로젝트: Nevtep/mastercoind
// handleMemPoolMsg is invoked when a peer receives a mempool bitcoin message.
// It creates and sends an inventory message with the contents of the memory
// pool up to the maximum inventory allowed per message.
func (p *peer) handleMemPoolMsg(msg *btcwire.MsgMemPool) {
	// Generate inventory message with the available transactions in the
	// transaction memory pool.  Limit it to the max allowed inventory
	// per message.  The the NewMsgInvSizeHint function automatically limits
	// the passed hint to the maximum allowed, so it's safe to pass it
	// without double checking it here.
	hashes := p.server.txMemPool.TxShas()
	invMsg := btcwire.NewMsgInvSizeHint(uint(len(hashes)))
	for i, hash := range hashes {
		// Another thread might have removed the transaction from the
		// pool since the initial query.
		if !p.server.txMemPool.IsTransactionInPool(hash) {
			continue
		}

		iv := btcwire.NewInvVect(btcwire.InvTypeTx, hash)
		invMsg.AddInvVect(iv)
		if i+1 >= btcwire.MaxInvPerMsg {
			break
		}
	}

	// Send the inventory message if there is anything to send.
	if len(invMsg.InvList) > 0 {
		p.QueueMessage(invMsg, nil)
	}
}
예제 #2
0
파일: msginv_test.go 프로젝트: kac-/btcwire
// TestInv tests the MsgInv API.
func TestInv(t *testing.T) {
	pver := btcwire.ProtocolVersion

	// Ensure the command is expected value.
	wantCmd := "inv"
	msg := btcwire.NewMsgInv()
	if cmd := msg.Command(); cmd != wantCmd {
		t.Errorf("NewMsgInv: wrong command - got %v want %v",
			cmd, wantCmd)
	}

	// Ensure max payload is expected value for latest protocol version.
	// Num inventory vectors (varInt) + max allowed inventory vectors.
	wantPayload := uint32(1800009)
	maxPayload := msg.MaxPayloadLength(pver)
	if maxPayload != wantPayload {
		t.Errorf("MaxPayloadLength: wrong max payload length for "+
			"protocol version %d - got %v, want %v", pver,
			maxPayload, wantPayload)
	}

	// Ensure inventory vectors are added properly.
	hash := btcwire.ShaHash{}
	iv := btcwire.NewInvVect(btcwire.InvTypeBlock, &hash)
	err := msg.AddInvVect(iv)
	if err != nil {
		t.Errorf("AddInvVect: %v", err)
	}
	if msg.InvList[0] != iv {
		t.Errorf("AddInvVect: wrong invvect added - got %v, want %v",
			spew.Sprint(msg.InvList[0]), spew.Sprint(iv))
	}

	// Ensure adding more than the max allowed inventory vectors per
	// message returns an error.
	for i := 0; i < btcwire.MaxInvPerMsg; i++ {
		err = msg.AddInvVect(iv)
	}
	if err == nil {
		t.Errorf("AddInvVect: expected error on too many inventory " +
			"vectors not received")
	}

	// Ensure creating the message with a size hint larger than the max
	// works as expected.
	msg = btcwire.NewMsgInvSizeHint(btcwire.MaxInvPerMsg + 1)
	wantCap := btcwire.MaxInvPerMsg
	if cap(msg.InvList) != wantCap {
		t.Errorf("NewMsgInvSizeHint: wrong cap for size hint - "+
			"got %v, want %v", cap(msg.InvList), wantCap)
	}

	return
}