Example #1
0
func (c *one_net_conn) headers(d []byte) {
	var hdr [81]byte
	b := bytes.NewReader(d)
	cnt, er := btc.ReadVLen(b)
	if er != nil {
		return
	}
	if cnt == 0 /*|| LastBlock.node.Height>=10e3*/ {
		SetAllHeadersDone(true)
		return
	}
	for i := uint64(0); i < cnt; i++ {
		if _, er = b.Read(hdr[:]); er != nil {
			return
		}
		if hdr[80] != 0 {
			fmt.Println(LastBlock.node.Height, "Unexpected value of txn_count")
			continue
		}
		bl, er := btc.NewBlock(hdr[:])
		if er == nil {
			er = chkblock(bl)
			if er != nil {
				fmt.Println(er.Error())
				os.Exit(1)
			}
		} else {
			fmt.Println(LastBlock.node.Height, er.Error())
		}
	}
	//fmt.Println("Height:", LastBlock.node.Height)
}
Example #2
0
// Parese network's "addr" message
func ParseAddr(pl []byte) {
	b := bytes.NewBuffer(pl)
	cnt, _ := btc.ReadVLen(b)
	for i := 0; i < int(cnt); i++ {
		var buf [30]byte
		n, e := b.Read(buf[:])
		if n != len(buf) || e != nil {
			common.CountSafe("AddrError")
			//println("ParseAddr:", n, e)
			break
		}
		a := NewPeer(buf[:])
		if !ValidIp4(a.Ip4[:]) {
			common.CountSafe("AddrInvalid")
		} else if time.Unix(int64(a.Time), 0).Before(time.Now().Add(time.Minute)) {
			if time.Now().Before(time.Unix(int64(a.Time), 0).Add(ExpirePeerAfter)) {
				k := qdb.KeyType(a.UniqID())
				v := PeerDB.Get(k)
				if v != nil {
					a.Banned = NewPeer(v[:]).Banned
				}
				PeerDB.Put(k, a.Bytes())
			} else {
				common.CountSafe("AddrStale")
			}
		} else {
			common.CountSafe("AddrInFuture")
		}
	}
}
Example #3
0
func (c *oneConnection) ProcessGetBlocks(pl []byte) {
	b := bytes.NewReader(pl)
	var ver uint32
	e := binary.Read(b, binary.LittleEndian, &ver)
	if e != nil {
		println("ProcessGetBlocks:", e.Error(), c.addr.Ip())
		return
	}
	cnt, e := btc.ReadVLen(b)
	if e != nil {
		println("ProcessGetBlocks:", e.Error(), c.addr.Ip())
		return
	}
	h2get := make([]*btc.Uint256, cnt)
	var h [32]byte
	for i := 0; i < int(cnt); i++ {
		n, _ := b.Read(h[:])
		if n != 32 {
			println("getblocks too short", c.addr.Ip())
			return
		}
		h2get[i] = btc.NewUint256(h[:])
		if dbg > 1 {
			println(c.addr.Ip(), "getbl", h2get[i].String())
		}
	}
	n, _ := b.Read(h[:])
	if n != 32 {
		println("getblocks does not have hash_stop", c.addr.Ip())
		return
	}
	hashstop := btc.NewUint256(h[:])

	var maxheight uint32
	invs := make(map[[32]byte]bool, 500)
	for i := range h2get {
		BlockChain.BlockIndexAccess.Lock()
		if bl, ok := BlockChain.BlockIndex[h2get[i].BIdx()]; ok {
			if bl.Height > maxheight {
				maxheight = bl.Height
			}
			addInvBlockBranch(invs, bl, hashstop)
		}
		BlockChain.BlockIndexAccess.Unlock()
		if len(invs) >= 500 {
			break
		}
	}
	inv := new(bytes.Buffer)
	btc.WriteVlen(inv, uint32(len(invs)))
	for k, _ := range invs {
		binary.Write(inv, binary.LittleEndian, uint32(2))
		inv.Write(k[:])
	}
	if dbg > 1 {
		fmt.Println(c.addr.Ip(), "getblocks", cnt, maxheight, " ...", len(invs), "invs in resp ->", len(inv.Bytes()))
	}
	InvsSent++
	c.SendRawMsg("inv", inv.Bytes())
}
Example #4
0
func (c *one_net_conn) headers(d []byte) {
	var hdr [81]byte
	b := bytes.NewReader(d)
	cnt, er := btc.ReadVLen(b)
	if er != nil {
		return
	}
	if cnt == 0 {
		AllHeadersDone = true
		println("AllHeadersDone - terminate conn")
		c.broken = true
		return
	}
	for i := uint64(0); i < cnt; i++ {
		if _, er = b.Read(hdr[:]); er != nil {
			return
		}
		bl, er := btc.NewBlock(hdr[:])
		if er == nil {
			er = chkblock(bl)
			if er != nil {
				println(er.Error())
				os.Exit(1)
			}
		}
	}
	println("Height:", LastBlock.Node.Height)
}
Example #5
0
func (c *OneConnection) ProcessGetData(pl []byte) {
	//println(c.PeerAddr.Ip(), "getdata")
	b := bytes.NewReader(pl)
	cnt, e := btc.ReadVLen(b)
	if e != nil {
		println("ProcessGetData:", e.Error(), c.PeerAddr.Ip())
		return
	}
	for i := 0; i < int(cnt); i++ {
		var typ uint32
		var h [32]byte

		e = binary.Read(b, binary.LittleEndian, &typ)
		if e != nil {
			println("ProcessGetData:", e.Error(), c.PeerAddr.Ip())
			return
		}

		n, _ := b.Read(h[:])
		if n != 32 {
			println("ProcessGetData: pl too short", c.PeerAddr.Ip())
			return
		}

		common.CountSafe(fmt.Sprint("GetdataType", typ))
		if typ == 2 {
			uh := btc.NewUint256(h[:])
			bl, _, er := common.BlockChain.Blocks.BlockGet(uh)
			if er == nil {
				c.SendRawMsg("block", bl)
			} else {
				//println("block", uh.String(), er.Error())
			}
		} else if typ == 1 {
			// transaction
			uh := btc.NewUint256(h[:])
			TxMutex.Lock()
			if tx, ok := TransactionsToSend[uh.Hash]; ok && tx.Blocked == 0 {
				tx.SentCnt++
				tx.Lastsent = time.Now()
				TxMutex.Unlock()
				c.SendRawMsg("tx", tx.Data)
				if common.DebugLevel > 0 {
					println("sent tx to", c.PeerAddr.Ip())
				}
			} else {
				TxMutex.Unlock()
			}
		} else {
			if common.DebugLevel > 0 {
				println("getdata for type", typ, "not supported yet")
			}
		}
	}
}
Example #6
0
func (c *oneConnection) ProcessGetData(pl []byte) {
	//println(c.addr.Ip(), "getdata")
	b := bytes.NewReader(pl)
	cnt, e := btc.ReadVLen(b)
	if e != nil {
		println("ProcessGetData:", e.Error(), c.addr.Ip())
		return
	}
	for i := 0; i < int(cnt); i++ {
		var typ uint32
		var h [32]byte

		e = binary.Read(b, binary.LittleEndian, &typ)
		if e != nil {
			println("ProcessGetData:", e.Error(), c.addr.Ip())
			return
		}

		n, _ := b.Read(h[:])
		if n != 32 {
			println("ProcessGetData: pl too short", c.addr.Ip())
			return
		}

		if typ == 2 {
			uh := btc.NewUint256(h[:])
			bl, _, er := BlockChain.Blocks.BlockGet(uh)
			if er == nil {
				BlockSent++
				c.SendRawMsg("block", bl)
			} else {
				//println("block", uh.String(), er.Error())
			}
		} else if typ == 1 {
			// transaction
			uh := btc.NewUint256(h[:])
			if tx, ok := TransactionsToSend[uh.Hash]; ok {
				c.SendRawMsg("tx", tx)
				println("sent tx to", c.addr.Ip())
			}
		} else {
			println("getdata for type", typ, "not supported yet")
		}
	}
}
Example #7
0
func parse_addr(pl []byte) {
	b := bytes.NewBuffer(pl)
	cnt, _ := btc.ReadVLen(b)
	for i := 0; i < int(cnt); i++ {
		var buf [30]byte
		var ip4 [4]byte
		n, e := b.Read(buf[:])
		if n != len(buf) || e != nil {
			fmt.Println("parse_addr:", n, e)
			break
		}
		copy(ip4[:], buf[24:28])
		if validip4(ip4[:]) {
			AddrMutex.Lock()
			if _, pres := AddrDatbase[ip4]; !pres {
				AddrDatbase[ip4] = false
			}
			AddrMutex.Unlock()
		}
	}
}
Example #8
0
func ParseAddr(pl []byte) {
	b := bytes.NewBuffer(pl)
	now := uint32(time.Now().Unix())
	cnt, _ := btc.ReadVLen(b)
	for i := 0; i < int(cnt); i++ {
		var buf [30]byte
		n, e := b.Read(buf[:])
		if n != len(buf) || e != nil {
			println("ParseAddr:", n, e)
			break
		}
		a := newPeer(buf[:])
		if a.Time > now-expirePeerAfter {
			k := qdb.KeyType(a.UniqID())
			v := peerDB.Get(k)
			if v != nil {
				a.Banned = newPeer(v[:]).Banned
			}
			peerDB.Put(k, a.Bytes())
		}
	}
	peerDB.Defrag()
}
Example #9
0
// Read VLen followed by the number of locators
// parse the payload of getblocks and getheaders messages
func parseLocatorsPayload(pl []byte) (h2get []*btc.Uint256, hashstop *btc.Uint256, er error) {
	var cnt uint64
	var h [32]byte
	var ver uint32

	b := bytes.NewReader(pl)

	// version
	if er = binary.Read(b, binary.LittleEndian, &ver); er != nil {
		return
	}

	// hash count
	cnt, er = btc.ReadVLen(b)
	if er != nil {
		return
	}

	// block locator hashes
	if cnt > 0 {
		h2get = make([]*btc.Uint256, cnt)
		for i := 0; i < int(cnt); i++ {
			if _, er = b.Read(h[:]); er != nil {
				return
			}
			h2get[i] = btc.NewUint256(h[:])
		}
	}

	// hash_stop
	if _, er = b.Read(h[:]); er != nil {
		return
	}
	hashstop = btc.NewUint256(h[:])

	return
}
Example #10
0
func (c *OneConnection) ProcessGetBlocks(pl []byte) {
	b := bytes.NewReader(pl)
	var ver uint32
	e := binary.Read(b, binary.LittleEndian, &ver)
	if e != nil {
		println("ProcessGetBlocks:", e.Error(), c.PeerAddr.Ip())
		common.CountSafe("GetblksNoVer")
		c.DoS()
		return
	}
	cnt, e := btc.ReadVLen(b)
	if e != nil {
		println("ProcessGetBlocks:", e.Error(), c.PeerAddr.Ip())
		common.CountSafe("GetblksNoVlen")
		c.DoS()
		return
	}

	if cnt < 1 {
		println("ProcessGetBlocks: empty inv list", c.PeerAddr.Ip())
		common.CountSafe("GetblksNoInvs")
		c.DoS()
		return
	}

	h2get := make([]*btc.Uint256, cnt)
	var h [32]byte
	for i := 0; i < int(cnt); i++ {
		n, _ := b.Read(h[:])
		if n != 32 {
			if common.DebugLevel > 0 {
				println("getblocks too short", c.PeerAddr.Ip())
			}
			common.CountSafe("GetblksTooShort")
			c.DoS()
			return
		}
		h2get[i] = btc.NewUint256(h[:])
		if common.DebugLevel > 2 {
			println(c.PeerAddr.Ip(), "getbl", h2get[i].String())
		}
	}
	n, _ := b.Read(h[:])
	if n != 32 {
		if common.DebugLevel > 0 {
			println("getblocks does not have hash_stop", c.PeerAddr.Ip())
		}
		common.CountSafe("GetblksNoStop")
		c.DoS()
		return
	}
	hashstop := btc.NewUint256(h[:])

	invs := make(map[[32]byte]bool, 500)
	for i := range h2get {
		common.BlockChain.BlockIndexAccess.Lock()
		if bl, ok := common.BlockChain.BlockIndex[h2get[i].BIdx()]; ok {
			// make sure that this block is in our main chain
			common.Last.Mutex.Lock()
			end := common.Last.Block
			common.Last.Mutex.Unlock()
			for ; end != nil && end.Height >= bl.Height; end = end.Parent {
				if end == bl {
					addInvBlockBranch(invs, bl, hashstop) // Yes - this is the main chain
					if common.DebugLevel > 0 {
						fmt.Println(c.PeerAddr.Ip(), "getblocks from", bl.Height,
							"stop at", hashstop.String(), "->", len(invs), "invs")
					}

					if len(invs) > 0 {
						common.BlockChain.BlockIndexAccess.Unlock()

						inv := new(bytes.Buffer)
						btc.WriteVlen(inv, uint32(len(invs)))
						for k, _ := range invs {
							binary.Write(inv, binary.LittleEndian, uint32(2))
							inv.Write(k[:])
						}
						c.SendRawMsg("inv", inv.Bytes())
						return
					}
				}
			}
		}
		common.BlockChain.BlockIndexAccess.Unlock()
	}

	common.CountSafe("GetblksMissed")
	return
}
Example #11
0
func (c *OneConnection) ProcessGetData(pl []byte) {
	var notfound []byte

	//println(c.PeerAddr.Ip(), "getdata")
	b := bytes.NewReader(pl)
	cnt, e := btc.ReadVLen(b)
	if e != nil {
		println("ProcessGetData:", e.Error(), c.PeerAddr.Ip())
		return
	}
	for i := 0; i < int(cnt); i++ {
		var typ uint32
		var h [36]byte

		n, _ := b.Read(h[:])
		if n != 36 {
			println("ProcessGetData: pl too short", c.PeerAddr.Ip())
			return
		}

		typ = binary.LittleEndian.Uint32(h[:4])

		common.CountSafe(fmt.Sprint("GetdataType", typ))
		if typ == 2 {
			uh := btc.NewUint256(h[4:])
			bl, _, er := common.BlockChain.Blocks.BlockGet(uh)
			if er == nil {
				c.SendRawMsg("block", bl)
			} else {
				notfound = append(notfound, h[:]...)
			}
		} else if typ == 1 {
			// transaction
			uh := btc.NewUint256(h[4:])
			TxMutex.Lock()
			if tx, ok := TransactionsToSend[uh.Hash]; ok && tx.Blocked == 0 {
				tx.SentCnt++
				tx.Lastsent = time.Now()
				TxMutex.Unlock()
				c.SendRawMsg("tx", tx.Data)
			} else {
				TxMutex.Unlock()
				notfound = append(notfound, h[:]...)
			}
		} else {
			if common.DebugLevel > 0 {
				println("getdata for type", typ, "not supported yet")
			}
			if typ > 0 && typ <= 3 /*3 is a filtered block(we dont support it)*/ {
				notfound = append(notfound, h[:]...)
			}
		}
	}

	if len(notfound) > 0 {
		buf := new(bytes.Buffer)
		btc.WriteVlen(buf, uint32(len(notfound)/36))
		buf.Write(notfound)
		c.SendRawMsg("notfound", buf.Bytes())
	}
}