You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
249 lines
7.6 KiB
249 lines
7.6 KiB
package p2p
|
|
|
|
import (
|
|
"fmt"
|
|
"reflect"
|
|
|
|
"github.com/tendermint/tendermint/libs/bytes"
|
|
tmstrings "github.com/tendermint/tendermint/libs/strings"
|
|
"github.com/tendermint/tendermint/version"
|
|
)
|
|
|
|
const (
|
|
maxNodeInfoSize = 10240 // 10KB
|
|
maxNumChannels = 16 // plenty of room for upgrades, for now
|
|
)
|
|
|
|
// Max size of the NodeInfo struct
|
|
func MaxNodeInfoSize() int {
|
|
return maxNodeInfoSize
|
|
}
|
|
|
|
//-------------------------------------------------------------
|
|
|
|
// NodeInfo exposes basic info of a node
|
|
// and determines if we're compatible.
|
|
type NodeInfo interface {
|
|
ID() ID
|
|
nodeInfoAddress
|
|
nodeInfoTransport
|
|
}
|
|
|
|
type nodeInfoAddress interface {
|
|
NetAddress() (*NetAddress, error)
|
|
}
|
|
|
|
// nodeInfoTransport validates a nodeInfo and checks
|
|
// our compatibility with it. It's for use in the handshake.
|
|
type nodeInfoTransport interface {
|
|
Validate() error
|
|
CompatibleWith(other NodeInfo) error
|
|
}
|
|
|
|
//-------------------------------------------------------------
|
|
|
|
// ProtocolVersion contains the protocol versions for the software.
|
|
type ProtocolVersion struct {
|
|
P2P version.Protocol `json:"p2p"`
|
|
Block version.Protocol `json:"block"`
|
|
App version.Protocol `json:"app"`
|
|
}
|
|
|
|
// defaultProtocolVersion populates the Block and P2P versions using
|
|
// the global values, but not the App.
|
|
var defaultProtocolVersion = NewProtocolVersion(
|
|
version.P2PProtocol,
|
|
version.BlockProtocol,
|
|
0,
|
|
)
|
|
|
|
// NewProtocolVersion returns a fully populated ProtocolVersion.
|
|
func NewProtocolVersion(p2p, block, app version.Protocol) ProtocolVersion {
|
|
return ProtocolVersion{
|
|
P2P: p2p,
|
|
Block: block,
|
|
App: app,
|
|
}
|
|
}
|
|
|
|
//-------------------------------------------------------------
|
|
|
|
// Assert DefaultNodeInfo satisfies NodeInfo
|
|
var _ NodeInfo = DefaultNodeInfo{}
|
|
|
|
// DefaultNodeInfo is the basic node information exchanged
|
|
// between two peers during the Tendermint P2P handshake.
|
|
type DefaultNodeInfo struct {
|
|
ProtocolVersion ProtocolVersion `json:"protocol_version"`
|
|
|
|
// Authenticate
|
|
// TODO: replace with NetAddress
|
|
DefaultNodeID ID `json:"id"` // authenticated identifier
|
|
ListenAddr string `json:"listen_addr"` // accepting incoming
|
|
|
|
// Check compatibility.
|
|
// Channels are HexBytes so easier to read as JSON
|
|
Network string `json:"network"` // network/chain ID
|
|
Version string `json:"version"` // major.minor.revision
|
|
Channels bytes.HexBytes `json:"channels"` // channels this node knows about
|
|
|
|
// ASCIIText fields
|
|
Moniker string `json:"moniker"` // arbitrary moniker
|
|
Other DefaultNodeInfoOther `json:"other"` // other application specific data
|
|
}
|
|
|
|
// DefaultNodeInfoOther is the misc. applcation specific data
|
|
type DefaultNodeInfoOther struct {
|
|
TxIndex string `json:"tx_index"`
|
|
RPCAddress string `json:"rpc_address"`
|
|
}
|
|
|
|
// ID returns the node's peer ID.
|
|
func (info DefaultNodeInfo) ID() ID {
|
|
return info.DefaultNodeID
|
|
}
|
|
|
|
// Validate checks the self-reported DefaultNodeInfo is safe.
|
|
// It returns an error if there
|
|
// are too many Channels, if there are any duplicate Channels,
|
|
// if the ListenAddr is malformed, or if the ListenAddr is a host name
|
|
// that can not be resolved to some IP.
|
|
// TODO: constraints for Moniker/Other? Or is that for the UI ?
|
|
// JAE: It needs to be done on the client, but to prevent ambiguous
|
|
// unicode characters, maybe it's worth sanitizing it here.
|
|
// In the future we might want to validate these, once we have a
|
|
// name-resolution system up.
|
|
// International clients could then use punycode (or we could use
|
|
// url-encoding), and we just need to be careful with how we handle that in our
|
|
// clients. (e.g. off by default).
|
|
func (info DefaultNodeInfo) Validate() error {
|
|
|
|
// ID is already validated.
|
|
|
|
// Validate ListenAddr.
|
|
_, err := NewNetAddressString(IDAddressString(info.ID(), info.ListenAddr))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// Network is validated in CompatibleWith.
|
|
|
|
// Validate Version
|
|
if len(info.Version) > 0 &&
|
|
(!tmstrings.IsASCIIText(info.Version) || tmstrings.ASCIITrim(info.Version) == "") {
|
|
|
|
return fmt.Errorf("info.Version must be valid ASCII text without tabs, but got %v", info.Version)
|
|
}
|
|
|
|
// Validate Channels - ensure max and check for duplicates.
|
|
if len(info.Channels) > maxNumChannels {
|
|
return fmt.Errorf("info.Channels is too long (%v). Max is %v", len(info.Channels), maxNumChannels)
|
|
}
|
|
channels := make(map[byte]struct{})
|
|
for _, ch := range info.Channels {
|
|
_, ok := channels[ch]
|
|
if ok {
|
|
return fmt.Errorf("info.Channels contains duplicate channel id %v", ch)
|
|
}
|
|
channels[ch] = struct{}{}
|
|
}
|
|
|
|
// Validate Moniker.
|
|
if !tmstrings.IsASCIIText(info.Moniker) || tmstrings.ASCIITrim(info.Moniker) == "" {
|
|
return fmt.Errorf("info.Moniker must be valid non-empty ASCII text without tabs, but got %v", info.Moniker)
|
|
}
|
|
|
|
// Validate Other.
|
|
other := info.Other
|
|
txIndex := other.TxIndex
|
|
switch txIndex {
|
|
case "", "on", "off":
|
|
default:
|
|
return fmt.Errorf("info.Other.TxIndex should be either 'on', 'off', or empty string, got '%v'", txIndex)
|
|
}
|
|
// XXX: Should we be more strict about address formats?
|
|
rpcAddr := other.RPCAddress
|
|
if len(rpcAddr) > 0 && (!tmstrings.IsASCIIText(rpcAddr) || tmstrings.ASCIITrim(rpcAddr) == "") {
|
|
return fmt.Errorf("info.Other.RPCAddress=%v must be valid ASCII text without tabs", rpcAddr)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// CompatibleWith checks if two DefaultNodeInfo are compatible with eachother.
|
|
// CONTRACT: two nodes are compatible if the Block version and network match
|
|
// and they have at least one channel in common.
|
|
func (info DefaultNodeInfo) CompatibleWith(otherInfo NodeInfo) error {
|
|
other, ok := otherInfo.(DefaultNodeInfo)
|
|
if !ok {
|
|
return fmt.Errorf("wrong NodeInfo type. Expected DefaultNodeInfo, got %v", reflect.TypeOf(otherInfo))
|
|
}
|
|
|
|
if info.ProtocolVersion.Block != other.ProtocolVersion.Block {
|
|
return fmt.Errorf("peer is on a different Block version. Got %v, expected %v",
|
|
other.ProtocolVersion.Block, info.ProtocolVersion.Block)
|
|
}
|
|
|
|
// nodes must be on the same network
|
|
if info.Network != other.Network {
|
|
return fmt.Errorf("peer is on a different network. Got %v, expected %v", other.Network, info.Network)
|
|
}
|
|
|
|
// if we have no channels, we're just testing
|
|
if len(info.Channels) == 0 {
|
|
return nil
|
|
}
|
|
|
|
// for each of our channels, check if they have it
|
|
found := false
|
|
OUTER_LOOP:
|
|
for _, ch1 := range info.Channels {
|
|
for _, ch2 := range other.Channels {
|
|
if ch1 == ch2 {
|
|
found = true
|
|
break OUTER_LOOP // only need one
|
|
}
|
|
}
|
|
}
|
|
if !found {
|
|
return fmt.Errorf("peer has no common channels. Our channels: %v ; Peer channels: %v", info.Channels, other.Channels)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// NetAddress returns a NetAddress derived from the DefaultNodeInfo -
|
|
// it includes the authenticated peer ID and the self-reported
|
|
// ListenAddr. Note that the ListenAddr is not authenticated and
|
|
// may not match that address actually dialed if its an outbound peer.
|
|
func (info DefaultNodeInfo) NetAddress() (*NetAddress, error) {
|
|
idAddr := IDAddressString(info.ID(), info.ListenAddr)
|
|
return NewNetAddressString(idAddr)
|
|
}
|
|
|
|
//-----------------------------------------------------------
|
|
// These methods are for Protobuf Compatibility
|
|
|
|
// Size returns the size of the amino encoding, in bytes.
|
|
func (info *DefaultNodeInfo) Size() int {
|
|
bs, _ := info.Marshal()
|
|
return len(bs)
|
|
}
|
|
|
|
// Marshal returns the amino encoding.
|
|
func (info *DefaultNodeInfo) Marshal() ([]byte, error) {
|
|
return cdc.MarshalBinaryBare(info)
|
|
}
|
|
|
|
// MarshalTo calls Marshal and copies to the given buffer.
|
|
func (info *DefaultNodeInfo) MarshalTo(data []byte) (int, error) {
|
|
bs, err := info.Marshal()
|
|
if err != nil {
|
|
return -1, err
|
|
}
|
|
return copy(data, bs), nil
|
|
}
|
|
|
|
// Unmarshal deserializes from amino encoded form.
|
|
func (info *DefaultNodeInfo) Unmarshal(bs []byte) error {
|
|
return cdc.UnmarshalBinaryBare(bs, info)
|
|
}
|