package p2p import ( "fmt" "net" "strconv" "strings" crypto "github.com/tendermint/go-crypto" ) const maxNodeInfoSize = 10240 // 10Kb type NodeInfo struct { PubKey crypto.PubKeyEd25519 `json:"pub_key"` Moniker string `json:"moniker"` Network string `json:"network"` RemoteAddr string `json:"remote_addr"` ListenAddr string `json:"listen_addr"` Version string `json:"version"` // major.minor.revision Other []string `json:"other"` // other application specific data } // CONTRACT: two nodes are compatible if the major/minor versions match and network match func (info *NodeInfo) CompatibleWith(other *NodeInfo) error { iMajor, iMinor, _, iErr := splitVersion(info.Version) oMajor, oMinor, _, 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) } // minor version must match if iMinor != oMinor { return fmt.Errorf("Peer is on a different minor version. Got %v, expected %v", oMinor, iMinor) } // 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) } return nil } func (info *NodeInfo) ListenHost() string { host, _, _ := net.SplitHostPort(info.ListenAddr) // nolint: errcheck, gas return host } func (info *NodeInfo) ListenPort() int { _, port, _ := net.SplitHostPort(info.ListenAddr) // nolint: errcheck, gas port_i, err := strconv.Atoi(port) if err != nil { return -1 } return port_i } func (info NodeInfo) String() string { return fmt.Sprintf("NodeInfo{pk: %v, moniker: %v, network: %v [remote %v, listen %v], version: %v (%v)}", info.PubKey, info.Moniker, info.Network, info.RemoteAddr, 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 }