0fd6004958
In this commit: * we partition lnwire.ChanUpdateFlag into two (ChanUpdateChanFlags and ChanUpdateMsgFlags), from a uint16 to a pair of uint8's * we rename the ChannelUpdate.Flags to ChannelFlags and add an additional MessageFlags field, which will be used to indicate the presence of the optional field HtlcMaximumMsat within the ChannelUpdate. * we partition ChannelEdgePolicy.Flags into message and channel flags. This change corresponds to the partitioning of the ChannelUpdate's Flags field into MessageFlags and ChannelFlags. Co-authored-by: Johan T. Halseth <johanth@gmail.com>
840 lines
19 KiB
Go
840 lines
19 KiB
Go
package lnwire
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import (
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"bytes"
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"encoding/binary"
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"fmt"
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"image/color"
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"io"
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"math"
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"net"
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"github.com/btcsuite/btcd/btcec"
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"github.com/btcsuite/btcd/chaincfg/chainhash"
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"github.com/btcsuite/btcd/wire"
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"github.com/btcsuite/btcutil"
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"github.com/go-errors/errors"
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"github.com/lightningnetwork/lnd/tor"
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)
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// MaxSliceLength is the maximum allowed length for any opaque byte slices in
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// the wire protocol.
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const MaxSliceLength = 65535
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// PkScript is simple type definition which represents a raw serialized public
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// key script.
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type PkScript []byte
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// addressType specifies the network protocol and version that should be used
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// when connecting to a node at a particular address.
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type addressType uint8
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const (
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// noAddr denotes a blank address. An address of this type indicates
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// that a node doesn't have any advertised addresses.
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noAddr addressType = 0
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// tcp4Addr denotes an IPv4 TCP address.
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tcp4Addr addressType = 1
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// tcp6Addr denotes an IPv6 TCP address.
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tcp6Addr addressType = 2
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// v2OnionAddr denotes a version 2 Tor onion service address.
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v2OnionAddr addressType = 3
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// v3OnionAddr denotes a version 3 Tor (prop224) onion service address.
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v3OnionAddr addressType = 4
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)
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// AddrLen returns the number of bytes that it takes to encode the target
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// address.
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func (a addressType) AddrLen() uint16 {
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switch a {
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case noAddr:
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return 0
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case tcp4Addr:
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return 6
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case tcp6Addr:
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return 18
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case v2OnionAddr:
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return 12
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case v3OnionAddr:
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return 37
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default:
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return 0
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}
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}
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// WriteElement is a one-stop shop to write the big endian representation of
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// any element which is to be serialized for the wire protocol. The passed
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// io.Writer should be backed by an appropriately sized byte slice, or be able
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// to dynamically expand to accommodate additional data.
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//
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// TODO(roasbeef): this should eventually draw from a buffer pool for
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// serialization.
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func WriteElement(w io.Writer, element interface{}) error {
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switch e := element.(type) {
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case NodeAlias:
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if _, err := w.Write(e[:]); err != nil {
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return err
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}
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case ShortChanIDEncoding:
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var b [1]byte
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b[0] = uint8(e)
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if _, err := w.Write(b[:]); err != nil {
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return err
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}
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case uint8:
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var b [1]byte
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b[0] = e
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if _, err := w.Write(b[:]); err != nil {
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return err
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}
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case FundingFlag:
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var b [1]byte
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b[0] = uint8(e)
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if _, err := w.Write(b[:]); err != nil {
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return err
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}
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case uint16:
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var b [2]byte
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binary.BigEndian.PutUint16(b[:], e)
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if _, err := w.Write(b[:]); err != nil {
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return err
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}
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case ChanUpdateMsgFlags:
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var b [1]byte
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b[0] = uint8(e)
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if _, err := w.Write(b[:]); err != nil {
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return err
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}
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case ChanUpdateChanFlags:
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var b [1]byte
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b[0] = uint8(e)
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if _, err := w.Write(b[:]); err != nil {
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return err
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}
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case ErrorCode:
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var b [2]byte
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binary.BigEndian.PutUint16(b[:], uint16(e))
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if _, err := w.Write(b[:]); err != nil {
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return err
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}
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case MilliSatoshi:
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var b [8]byte
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binary.BigEndian.PutUint64(b[:], uint64(e))
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if _, err := w.Write(b[:]); err != nil {
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return err
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}
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case btcutil.Amount:
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var b [8]byte
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binary.BigEndian.PutUint64(b[:], uint64(e))
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if _, err := w.Write(b[:]); err != nil {
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return err
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}
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case uint32:
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var b [4]byte
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binary.BigEndian.PutUint32(b[:], e)
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if _, err := w.Write(b[:]); err != nil {
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return err
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}
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case uint64:
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var b [8]byte
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binary.BigEndian.PutUint64(b[:], e)
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if _, err := w.Write(b[:]); err != nil {
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return err
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}
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case *btcec.PublicKey:
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if e == nil {
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return fmt.Errorf("cannot write nil pubkey")
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}
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var b [33]byte
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serializedPubkey := e.SerializeCompressed()
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copy(b[:], serializedPubkey)
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if _, err := w.Write(b[:]); err != nil {
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return err
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}
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case []Sig:
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var b [2]byte
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numSigs := uint16(len(e))
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binary.BigEndian.PutUint16(b[:], numSigs)
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if _, err := w.Write(b[:]); err != nil {
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return err
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}
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for _, sig := range e {
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if err := WriteElement(w, sig); err != nil {
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return err
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}
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}
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case Sig:
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// Write buffer
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if _, err := w.Write(e[:]); err != nil {
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return err
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}
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case PingPayload:
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var l [2]byte
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binary.BigEndian.PutUint16(l[:], uint16(len(e)))
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if _, err := w.Write(l[:]); err != nil {
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return err
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}
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if _, err := w.Write(e[:]); err != nil {
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return err
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}
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case PongPayload:
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var l [2]byte
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binary.BigEndian.PutUint16(l[:], uint16(len(e)))
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if _, err := w.Write(l[:]); err != nil {
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return err
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}
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if _, err := w.Write(e[:]); err != nil {
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return err
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}
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case ErrorData:
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var l [2]byte
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binary.BigEndian.PutUint16(l[:], uint16(len(e)))
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if _, err := w.Write(l[:]); err != nil {
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return err
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}
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if _, err := w.Write(e[:]); err != nil {
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return err
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}
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case OpaqueReason:
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var l [2]byte
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binary.BigEndian.PutUint16(l[:], uint16(len(e)))
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if _, err := w.Write(l[:]); err != nil {
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return err
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}
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if _, err := w.Write(e[:]); err != nil {
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return err
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}
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case [33]byte:
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if _, err := w.Write(e[:]); err != nil {
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return err
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}
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case []byte:
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if _, err := w.Write(e[:]); err != nil {
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return err
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}
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case PkScript:
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// The largest script we'll accept is a p2wsh which is exactly
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// 34 bytes long.
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scriptLength := len(e)
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if scriptLength > 34 {
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return fmt.Errorf("'PkScript' too long")
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}
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if err := wire.WriteVarBytes(w, 0, e); err != nil {
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return err
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}
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case *RawFeatureVector:
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if e == nil {
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return fmt.Errorf("cannot write nil feature vector")
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}
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if err := e.Encode(w); err != nil {
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return err
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}
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case wire.OutPoint:
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var h [32]byte
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copy(h[:], e.Hash[:])
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if _, err := w.Write(h[:]); err != nil {
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return err
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}
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if e.Index > math.MaxUint16 {
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return fmt.Errorf("index for outpoint (%v) is "+
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"greater than max index of %v", e.Index,
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math.MaxUint16)
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}
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var idx [2]byte
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binary.BigEndian.PutUint16(idx[:], uint16(e.Index))
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if _, err := w.Write(idx[:]); err != nil {
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return err
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}
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case ChannelID:
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if _, err := w.Write(e[:]); err != nil {
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return err
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}
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case FailCode:
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if err := WriteElement(w, uint16(e)); err != nil {
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return err
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}
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case ShortChannelID:
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// Check that field fit in 3 bytes and write the blockHeight
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if e.BlockHeight > ((1 << 24) - 1) {
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return errors.New("block height should fit in 3 bytes")
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}
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var blockHeight [4]byte
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binary.BigEndian.PutUint32(blockHeight[:], e.BlockHeight)
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if _, err := w.Write(blockHeight[1:]); err != nil {
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return err
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}
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// Check that field fit in 3 bytes and write the txIndex
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if e.TxIndex > ((1 << 24) - 1) {
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return errors.New("tx index should fit in 3 bytes")
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}
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var txIndex [4]byte
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binary.BigEndian.PutUint32(txIndex[:], e.TxIndex)
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if _, err := w.Write(txIndex[1:]); err != nil {
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return err
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}
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// Write the txPosition
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var txPosition [2]byte
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binary.BigEndian.PutUint16(txPosition[:], e.TxPosition)
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if _, err := w.Write(txPosition[:]); err != nil {
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return err
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}
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case *net.TCPAddr:
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if e == nil {
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return fmt.Errorf("cannot write nil TCPAddr")
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}
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if e.IP.To4() != nil {
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var descriptor [1]byte
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descriptor[0] = uint8(tcp4Addr)
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if _, err := w.Write(descriptor[:]); err != nil {
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return err
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}
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var ip [4]byte
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copy(ip[:], e.IP.To4())
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if _, err := w.Write(ip[:]); err != nil {
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return err
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}
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} else {
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var descriptor [1]byte
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descriptor[0] = uint8(tcp6Addr)
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if _, err := w.Write(descriptor[:]); err != nil {
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return err
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}
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var ip [16]byte
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copy(ip[:], e.IP.To16())
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if _, err := w.Write(ip[:]); err != nil {
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return err
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}
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}
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var port [2]byte
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binary.BigEndian.PutUint16(port[:], uint16(e.Port))
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if _, err := w.Write(port[:]); err != nil {
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return err
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}
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case *tor.OnionAddr:
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if e == nil {
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return errors.New("cannot write nil onion address")
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}
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var suffixIndex int
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switch len(e.OnionService) {
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case tor.V2Len:
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descriptor := []byte{byte(v2OnionAddr)}
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if _, err := w.Write(descriptor); err != nil {
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return err
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}
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suffixIndex = tor.V2Len - tor.OnionSuffixLen
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case tor.V3Len:
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descriptor := []byte{byte(v3OnionAddr)}
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if _, err := w.Write(descriptor); err != nil {
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return err
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}
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suffixIndex = tor.V3Len - tor.OnionSuffixLen
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default:
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return errors.New("unknown onion service length")
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}
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host, err := tor.Base32Encoding.DecodeString(
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e.OnionService[:suffixIndex],
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)
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if err != nil {
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return err
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}
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if _, err := w.Write(host); err != nil {
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return err
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}
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var port [2]byte
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binary.BigEndian.PutUint16(port[:], uint16(e.Port))
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if _, err := w.Write(port[:]); err != nil {
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return err
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}
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case []net.Addr:
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// First, we'll encode all the addresses into an intermediate
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// buffer. We need to do this in order to compute the total
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// length of the addresses.
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var addrBuf bytes.Buffer
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for _, address := range e {
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if err := WriteElement(&addrBuf, address); err != nil {
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return err
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}
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}
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// With the addresses fully encoded, we can now write out the
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// number of bytes needed to encode them.
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addrLen := addrBuf.Len()
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if err := WriteElement(w, uint16(addrLen)); err != nil {
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return err
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}
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// Finally, we'll write out the raw addresses themselves, but
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// only if we have any bytes to write.
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if addrLen > 0 {
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if _, err := w.Write(addrBuf.Bytes()); err != nil {
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return err
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}
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}
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case color.RGBA:
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if err := WriteElements(w, e.R, e.G, e.B); err != nil {
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return err
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}
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case DeliveryAddress:
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var length [2]byte
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binary.BigEndian.PutUint16(length[:], uint16(len(e)))
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if _, err := w.Write(length[:]); err != nil {
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return err
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}
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if _, err := w.Write(e[:]); err != nil {
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return err
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}
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default:
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return fmt.Errorf("Unknown type in WriteElement: %T", e)
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}
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return nil
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}
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// WriteElements is writes each element in the elements slice to the passed
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// io.Writer using WriteElement.
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func WriteElements(w io.Writer, elements ...interface{}) error {
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for _, element := range elements {
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err := WriteElement(w, element)
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if err != nil {
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return err
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}
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}
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return nil
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}
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// ReadElement is a one-stop utility function to deserialize any datastructure
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// encoded using the serialization format of lnwire.
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func ReadElement(r io.Reader, element interface{}) error {
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var err error
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switch e := element.(type) {
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case *NodeAlias:
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var a [32]byte
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if _, err := io.ReadFull(r, a[:]); err != nil {
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return err
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}
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alias, err := NewNodeAlias(string(a[:]))
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if err != nil {
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return err
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}
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*e = alias
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case *ShortChanIDEncoding:
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var b [1]uint8
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if _, err := r.Read(b[:]); err != nil {
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return err
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}
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*e = ShortChanIDEncoding(b[0])
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case *uint8:
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var b [1]uint8
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if _, err := r.Read(b[:]); err != nil {
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return err
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}
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*e = b[0]
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case *FundingFlag:
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var b [1]uint8
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if _, err := r.Read(b[:]); err != nil {
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return err
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}
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*e = FundingFlag(b[0])
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case *uint16:
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var b [2]byte
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if _, err := io.ReadFull(r, b[:]); err != nil {
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return err
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}
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*e = binary.BigEndian.Uint16(b[:])
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case *ChanUpdateMsgFlags:
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var b [1]uint8
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if _, err := r.Read(b[:]); err != nil {
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return err
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}
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*e = ChanUpdateMsgFlags(b[0])
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case *ChanUpdateChanFlags:
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var b [1]uint8
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if _, err := r.Read(b[:]); err != nil {
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return err
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}
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*e = ChanUpdateChanFlags(b[0])
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case *ErrorCode:
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var b [2]byte
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if _, err := io.ReadFull(r, b[:]); err != nil {
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return err
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}
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*e = ErrorCode(binary.BigEndian.Uint16(b[:]))
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case *uint32:
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var b [4]byte
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if _, err := io.ReadFull(r, b[:]); err != nil {
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return err
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}
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*e = binary.BigEndian.Uint32(b[:])
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case *uint64:
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var b [8]byte
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if _, err := io.ReadFull(r, b[:]); err != nil {
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return err
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}
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*e = binary.BigEndian.Uint64(b[:])
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case *MilliSatoshi:
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var b [8]byte
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if _, err := io.ReadFull(r, b[:]); err != nil {
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return err
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}
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*e = MilliSatoshi(int64(binary.BigEndian.Uint64(b[:])))
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case *btcutil.Amount:
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var b [8]byte
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if _, err := io.ReadFull(r, b[:]); err != nil {
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return err
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}
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*e = btcutil.Amount(int64(binary.BigEndian.Uint64(b[:])))
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case **btcec.PublicKey:
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var b [btcec.PubKeyBytesLenCompressed]byte
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if _, err = io.ReadFull(r, b[:]); err != nil {
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return err
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}
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pubKey, err := btcec.ParsePubKey(b[:], btcec.S256())
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if err != nil {
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return err
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}
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*e = pubKey
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case **RawFeatureVector:
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f := NewRawFeatureVector()
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err = f.Decode(r)
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if err != nil {
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return err
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}
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*e = f
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case *[]Sig:
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var l [2]byte
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if _, err := io.ReadFull(r, l[:]); err != nil {
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return err
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}
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numSigs := binary.BigEndian.Uint16(l[:])
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var sigs []Sig
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if numSigs > 0 {
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sigs = make([]Sig, numSigs)
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for i := 0; i < int(numSigs); i++ {
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if err := ReadElement(r, &sigs[i]); err != nil {
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return err
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}
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}
|
|
}
|
|
|
|
*e = sigs
|
|
|
|
case *Sig:
|
|
if _, err := io.ReadFull(r, e[:]); err != nil {
|
|
return err
|
|
}
|
|
case *OpaqueReason:
|
|
var l [2]byte
|
|
if _, err := io.ReadFull(r, l[:]); err != nil {
|
|
return err
|
|
}
|
|
reasonLen := binary.BigEndian.Uint16(l[:])
|
|
|
|
*e = OpaqueReason(make([]byte, reasonLen))
|
|
if _, err := io.ReadFull(r, *e); err != nil {
|
|
return err
|
|
}
|
|
case *ErrorData:
|
|
var l [2]byte
|
|
if _, err := io.ReadFull(r, l[:]); err != nil {
|
|
return err
|
|
}
|
|
errorLen := binary.BigEndian.Uint16(l[:])
|
|
|
|
*e = ErrorData(make([]byte, errorLen))
|
|
if _, err := io.ReadFull(r, *e); err != nil {
|
|
return err
|
|
}
|
|
case *PingPayload:
|
|
var l [2]byte
|
|
if _, err := io.ReadFull(r, l[:]); err != nil {
|
|
return err
|
|
}
|
|
pingLen := binary.BigEndian.Uint16(l[:])
|
|
|
|
*e = PingPayload(make([]byte, pingLen))
|
|
if _, err := io.ReadFull(r, *e); err != nil {
|
|
return err
|
|
}
|
|
case *PongPayload:
|
|
var l [2]byte
|
|
if _, err := io.ReadFull(r, l[:]); err != nil {
|
|
return err
|
|
}
|
|
pongLen := binary.BigEndian.Uint16(l[:])
|
|
|
|
*e = PongPayload(make([]byte, pongLen))
|
|
if _, err := io.ReadFull(r, *e); err != nil {
|
|
return err
|
|
}
|
|
case *[33]byte:
|
|
if _, err := io.ReadFull(r, e[:]); err != nil {
|
|
return err
|
|
}
|
|
case []byte:
|
|
if _, err := io.ReadFull(r, e); err != nil {
|
|
return err
|
|
}
|
|
case *PkScript:
|
|
pkScript, err := wire.ReadVarBytes(r, 0, 34, "pkscript")
|
|
if err != nil {
|
|
return err
|
|
}
|
|
*e = pkScript
|
|
case *wire.OutPoint:
|
|
var h [32]byte
|
|
if _, err = io.ReadFull(r, h[:]); err != nil {
|
|
return err
|
|
}
|
|
hash, err := chainhash.NewHash(h[:])
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
var idxBytes [2]byte
|
|
_, err = io.ReadFull(r, idxBytes[:])
|
|
if err != nil {
|
|
return err
|
|
}
|
|
index := binary.BigEndian.Uint16(idxBytes[:])
|
|
|
|
*e = wire.OutPoint{
|
|
Hash: *hash,
|
|
Index: uint32(index),
|
|
}
|
|
case *FailCode:
|
|
if err := ReadElement(r, (*uint16)(e)); err != nil {
|
|
return err
|
|
}
|
|
case *ChannelID:
|
|
if _, err := io.ReadFull(r, e[:]); err != nil {
|
|
return err
|
|
}
|
|
|
|
case *ShortChannelID:
|
|
var blockHeight [4]byte
|
|
if _, err = io.ReadFull(r, blockHeight[1:]); err != nil {
|
|
return err
|
|
}
|
|
|
|
var txIndex [4]byte
|
|
if _, err = io.ReadFull(r, txIndex[1:]); err != nil {
|
|
return err
|
|
}
|
|
|
|
var txPosition [2]byte
|
|
if _, err = io.ReadFull(r, txPosition[:]); err != nil {
|
|
return err
|
|
}
|
|
|
|
*e = ShortChannelID{
|
|
BlockHeight: binary.BigEndian.Uint32(blockHeight[:]),
|
|
TxIndex: binary.BigEndian.Uint32(txIndex[:]),
|
|
TxPosition: binary.BigEndian.Uint16(txPosition[:]),
|
|
}
|
|
|
|
case *[]net.Addr:
|
|
// First, we'll read the number of total bytes that have been
|
|
// used to encode the set of addresses.
|
|
var numAddrsBytes [2]byte
|
|
if _, err = io.ReadFull(r, numAddrsBytes[:]); err != nil {
|
|
return err
|
|
}
|
|
addrsLen := binary.BigEndian.Uint16(numAddrsBytes[:])
|
|
|
|
// With the number of addresses, read, we'll now pull in the
|
|
// buffer of the encoded addresses into memory.
|
|
addrs := make([]byte, addrsLen)
|
|
if _, err := io.ReadFull(r, addrs[:]); err != nil {
|
|
return err
|
|
}
|
|
addrBuf := bytes.NewReader(addrs)
|
|
|
|
// Finally, we'll parse the remaining address payload in
|
|
// series, using the first byte to denote how to decode the
|
|
// address itself.
|
|
var (
|
|
addresses []net.Addr
|
|
addrBytesRead uint16
|
|
)
|
|
|
|
for addrBytesRead < addrsLen {
|
|
var descriptor [1]byte
|
|
if _, err = io.ReadFull(addrBuf, descriptor[:]); err != nil {
|
|
return err
|
|
}
|
|
|
|
addrBytesRead++
|
|
|
|
var address net.Addr
|
|
switch aType := addressType(descriptor[0]); aType {
|
|
case noAddr:
|
|
addrBytesRead += aType.AddrLen()
|
|
continue
|
|
|
|
case tcp4Addr:
|
|
var ip [4]byte
|
|
if _, err := io.ReadFull(addrBuf, ip[:]); err != nil {
|
|
return err
|
|
}
|
|
|
|
var port [2]byte
|
|
if _, err := io.ReadFull(addrBuf, port[:]); err != nil {
|
|
return err
|
|
}
|
|
|
|
address = &net.TCPAddr{
|
|
IP: net.IP(ip[:]),
|
|
Port: int(binary.BigEndian.Uint16(port[:])),
|
|
}
|
|
addrBytesRead += aType.AddrLen()
|
|
|
|
case tcp6Addr:
|
|
var ip [16]byte
|
|
if _, err := io.ReadFull(addrBuf, ip[:]); err != nil {
|
|
return err
|
|
}
|
|
|
|
var port [2]byte
|
|
if _, err := io.ReadFull(addrBuf, port[:]); err != nil {
|
|
return err
|
|
}
|
|
|
|
address = &net.TCPAddr{
|
|
IP: net.IP(ip[:]),
|
|
Port: int(binary.BigEndian.Uint16(port[:])),
|
|
}
|
|
addrBytesRead += aType.AddrLen()
|
|
|
|
case v2OnionAddr:
|
|
var h [tor.V2DecodedLen]byte
|
|
if _, err := io.ReadFull(addrBuf, h[:]); err != nil {
|
|
return err
|
|
}
|
|
|
|
var p [2]byte
|
|
if _, err := io.ReadFull(addrBuf, p[:]); err != nil {
|
|
return err
|
|
}
|
|
|
|
onionService := tor.Base32Encoding.EncodeToString(h[:])
|
|
onionService += tor.OnionSuffix
|
|
port := int(binary.BigEndian.Uint16(p[:]))
|
|
|
|
address = &tor.OnionAddr{
|
|
OnionService: onionService,
|
|
Port: port,
|
|
}
|
|
addrBytesRead += aType.AddrLen()
|
|
|
|
case v3OnionAddr:
|
|
var h [tor.V3DecodedLen]byte
|
|
if _, err := io.ReadFull(addrBuf, h[:]); err != nil {
|
|
return err
|
|
}
|
|
|
|
var p [2]byte
|
|
if _, err := io.ReadFull(addrBuf, p[:]); err != nil {
|
|
return err
|
|
}
|
|
|
|
onionService := tor.Base32Encoding.EncodeToString(h[:])
|
|
onionService += tor.OnionSuffix
|
|
port := int(binary.BigEndian.Uint16(p[:]))
|
|
|
|
address = &tor.OnionAddr{
|
|
OnionService: onionService,
|
|
Port: port,
|
|
}
|
|
addrBytesRead += aType.AddrLen()
|
|
|
|
default:
|
|
return &ErrUnknownAddrType{aType}
|
|
}
|
|
|
|
addresses = append(addresses, address)
|
|
}
|
|
|
|
*e = addresses
|
|
case *color.RGBA:
|
|
err := ReadElements(r,
|
|
&e.R,
|
|
&e.G,
|
|
&e.B,
|
|
)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
case *DeliveryAddress:
|
|
var addrLen [2]byte
|
|
if _, err = io.ReadFull(r, addrLen[:]); err != nil {
|
|
return err
|
|
}
|
|
length := binary.BigEndian.Uint16(addrLen[:])
|
|
|
|
var addrBytes [34]byte
|
|
if length > 34 {
|
|
return fmt.Errorf("Cannot read %d bytes into addrBytes", length)
|
|
}
|
|
if _, err = io.ReadFull(r, addrBytes[:length]); err != nil {
|
|
return err
|
|
}
|
|
*e = addrBytes[:length]
|
|
default:
|
|
return fmt.Errorf("Unknown type in ReadElement: %T", e)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// ReadElements deserializes a variable number of elements into the passed
|
|
// io.Reader, with each element being deserialized according to the ReadElement
|
|
// function.
|
|
func ReadElements(r io.Reader, elements ...interface{}) error {
|
|
for _, element := range elements {
|
|
err := ReadElement(r, element)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|