Added string identifier for Connection String

VERSION

@@ -1 +1 @@
-0.111.2
+0.111.3

server/connection.go

@@ -24,6 +24,10 @@ const (
 	Sending
 )
 
+const (
+	connectionStringID = "cs"
+)
+
 type ConnectionParams struct {
 	version    ConnectionParamVersion
 	netIP      net.IP
@@ -47,9 +51,10 @@ func NewConnectionParams(netIP net.IP, port int, publicKey *ecdsa.PublicKey, aes
 // ToString generates a string required for generating a secure connection to another Status device.
 //
 // The returned string will look like below:
-//   - "2:4FHRnp:H6G:uqnnMwVUfJc2Fkcaojet8F1ufKC3hZdGEt47joyBx9yd:BbnZ7Gc66t54a9kEFCf7FW8SGQuYypwHVeNkRYeNoqV6:2"
+//   - "cs2:4FHRnp:H6G:uqnnMwVUfJc2Fkcaojet8F1ufKC3hZdGEt47joyBx9yd:BbnZ7Gc66t54a9kEFCf7FW8SGQuYypwHVeNkRYeNoqV6:2"
 //
 // Format bytes encoded into a base58 string, delimited by ":"
+//   - string type identifier
 //   - version
 //   - net.IP
 //   - port
@@ -64,15 +69,19 @@ func (cp *ConnectionParams) ToString() string {
 	ek := base58.Encode(cp.aesKey)
 	m := base58.Encode(new(big.Int).SetInt64(int64(cp.serverMode)).Bytes())
 
-	return fmt.Sprintf("%s:%s:%s:%s:%s:%s", v, ip, p, k, ek, m)
+	return fmt.Sprintf("%s%s:%s:%s:%s:%s:%s", connectionStringID, v, ip, p, k, ek, m)
 }
 
 // FromString parses a connection params string required for to securely connect to another Status device.
 // This function parses a connection string generated by ToString
 func (cp *ConnectionParams) FromString(s string) error {
+	if s[:2] != connectionStringID {
+		return fmt.Errorf("connection string doesn't begin with identifier '%s'", connectionStringID)
+	}
+
 	requiredParams := 6
 
-	sData := strings.Split(s, ":")
+	sData := strings.Split(s[2:], ":")
 	if len(sData) != requiredParams {
 		return fmt.Errorf("expected data '%s' to have length of '%d', received '%d'", s, requiredParams, len(sData))
 	}

server/connection_test.go

@@ -7,7 +7,7 @@ import (
 )
 
 var (
-	connectionString = "2:4FHRnp:Q4:uqnnMwVUfJc2Fkcaojet8F1ufKC3hZdGEt47joyBx9yd:BbnZ7Gc66t54a9kEFCf7FW8SGQuYypwHVeNkRYeNoqV6:3"
+	connectionString = "cs2:4FHRnp:Q4:uqnnMwVUfJc2Fkcaojet8F1ufKC3hZdGEt47joyBx9yd:BbnZ7Gc66t54a9kEFCf7FW8SGQuYypwHVeNkRYeNoqV6:3"
 )
 
 func TestConnectionParamsSuite(t *testing.T) {