Add in proto to INFO

Signed-off-by: Derek Collison <derek@nats.io>

server/const.go

@@ -35,7 +35,13 @@ var (
 
 const (
 	// VERSION is the current version for the server.
-	VERSION = "1.2.0-beta3"
+	VERSION = "1.2.0-beta4"
+
+	// PROTO is the currently supported protocol.
+	// 0 was the original
+	// 1 maintains proto 0, adds echo abilities for CONNECT from the client. Clients
+	// should not send echo unless proto in INFO is >= 1.
+	PROTO = 1
 
 	// DEFAULT_PORT is the default port for client connections.
 	DEFAULT_PORT = 4222

server/server.go

@@ -41,6 +41,7 @@ import (
 type Info struct {
 	ID                string   `json:"server_id"`
 	Version           string   `json:"version"`
+	Proto             int      `json:"proto"`
 	GitCommit         string   `json:"git_commit,omitempty"`
 	GoVersion         string   `json:"go"`
 	Host              string   `json:"host"`
@@ -144,6 +145,7 @@ func New(opts *Options) *Server {
 	info := Info{
 		ID:           genID(),
 		Version:      VERSION,
+		Proto:        PROTO,
 		GitCommit:    gitCommit,
 		GoVersion:    runtime.Version(),
 		Host:         opts.Host,