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.
196 lines
6.3 KiB
196 lines
6.3 KiB
package p2p
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
|
|
cmn "github.com/tendermint/tendermint/libs/common"
|
|
)
|
|
|
|
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 is the basic node information exchanged
|
|
// between two peers during the Tendermint P2P handshake.
|
|
type NodeInfo struct {
|
|
// Authenticate
|
|
// TODO: replace with NetAddress
|
|
ID 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 cmn.HexBytes `json:"channels"` // channels this node knows about
|
|
|
|
// ASCIIText fields
|
|
Moniker string `json:"moniker"` // arbitrary moniker
|
|
Other NodeInfoOther `json:"other"` // other application specific data
|
|
}
|
|
|
|
// NodeInfoOther is the misc. applcation specific data
|
|
type NodeInfoOther struct {
|
|
AminoVersion string `json:"amino_version"`
|
|
P2PVersion string `json:"p2p_version"`
|
|
ConsensusVersion string `json:"consensus_version"`
|
|
RPCVersion string `json:"rpc_version"`
|
|
TxIndex string `json:"tx_index"`
|
|
RPCAddress string `json:"rpc_address"`
|
|
}
|
|
|
|
func (o NodeInfoOther) String() string {
|
|
return fmt.Sprintf(
|
|
"{amino_version: %v, p2p_version: %v, consensus_version: %v, rpc_version: %v, tx_index: %v}",
|
|
o.AminoVersion,
|
|
o.P2PVersion,
|
|
o.ConsensusVersion,
|
|
o.RPCVersion,
|
|
o.TxIndex,
|
|
)
|
|
}
|
|
|
|
// Validate checks the self-reported NodeInfo 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 NodeInfo) Validate() error {
|
|
if len(info.Channels) > maxNumChannels {
|
|
return fmt.Errorf("info.Channels is too long (%v). Max is %v", len(info.Channels), maxNumChannels)
|
|
}
|
|
|
|
// Sanitize ASCII text fields.
|
|
if !cmn.IsASCIIText(info.Moniker) || cmn.ASCIITrim(info.Moniker) == "" {
|
|
return fmt.Errorf("info.Moniker must be valid non-empty ASCII text without tabs, but got %v", info.Moniker)
|
|
}
|
|
|
|
// Sanitize versions
|
|
// XXX: Should we be more strict about version and address formats?
|
|
other := info.Other
|
|
versions := []string{other.AminoVersion,
|
|
other.AminoVersion,
|
|
other.P2PVersion,
|
|
other.ConsensusVersion,
|
|
other.RPCVersion}
|
|
for i, v := range versions {
|
|
if cmn.ASCIITrim(v) != "" && !cmn.IsASCIIText(v) {
|
|
return fmt.Errorf("info.Other[%d]=%v must be valid non-empty ASCII text without tabs", i, v)
|
|
}
|
|
}
|
|
if cmn.ASCIITrim(other.TxIndex) != "" && (other.TxIndex != "on" && other.TxIndex != "off") {
|
|
return fmt.Errorf("info.Other.TxIndex should be either 'on' or 'off', got '%v'", other.TxIndex)
|
|
}
|
|
if cmn.ASCIITrim(other.RPCAddress) != "" && !cmn.IsASCIIText(other.RPCAddress) {
|
|
return fmt.Errorf("info.Other.RPCAddress=%v must be valid non-empty ASCII text without tabs", other.RPCAddress)
|
|
}
|
|
|
|
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{}{}
|
|
}
|
|
|
|
// ensure ListenAddr is good
|
|
_, err := NewNetAddressString(IDAddressString(info.ID, info.ListenAddr))
|
|
return err
|
|
}
|
|
|
|
// CompatibleWith checks if two NodeInfo are compatible with eachother.
|
|
// CONTRACT: two nodes are compatible if the major version matches and network match
|
|
// and they have at least one channel in common.
|
|
func (info NodeInfo) CompatibleWith(other NodeInfo) error {
|
|
iMajor, _, _, iErr := splitVersion(info.Version)
|
|
oMajor, _, _, oErr := splitVersion(other.Version)
|
|
|
|
// if our own version number is not formatted right, we messed up
|
|
if iErr != nil {
|
|
return iErr
|
|
}
|
|
|
|
// version number must be formatted correctly ("x.x.x")
|
|
if oErr != nil {
|
|
return oErr
|
|
}
|
|
|
|
// major version must match
|
|
if iMajor != oMajor {
|
|
return fmt.Errorf("Peer is on a different major version. Got %v, expected %v", oMajor, iMajor)
|
|
}
|
|
|
|
// 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 NodeInfo -
|
|
// 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 NodeInfo) NetAddress() *NetAddress {
|
|
netAddr, err := NewNetAddressString(IDAddressString(info.ID, info.ListenAddr))
|
|
if err != nil {
|
|
switch err.(type) {
|
|
case ErrNetAddressLookup:
|
|
// XXX If the peer provided a host name and the lookup fails here
|
|
// we're out of luck.
|
|
// TODO: use a NetAddress in NodeInfo
|
|
default:
|
|
panic(err) // everything should be well formed by now
|
|
}
|
|
}
|
|
return netAddr
|
|
}
|
|
|
|
func (info NodeInfo) String() string {
|
|
return fmt.Sprintf("NodeInfo{id: %v, moniker: %v, network: %v [listen %v], version: %v (%v)}",
|
|
info.ID, info.Moniker, info.Network, info.ListenAddr, info.Version, info.Other)
|
|
}
|
|
|
|
func splitVersion(version string) (string, string, string, error) {
|
|
spl := strings.Split(version, ".")
|
|
if len(spl) != 3 {
|
|
return "", "", "", fmt.Errorf("Invalid version format %v", version)
|
|
}
|
|
return spl[0], spl[1], spl[2], nil
|
|
}
|