Chore: make the code more semantic

constant/adapters.go

@@ -22,14 +22,14 @@ type ProxyAdapter interface {
 }
 
 type ServerAdapter interface {
-	Addr() *Addr
+	Metadata() *Metadata
 	Close()
 }
 
 type Proxy interface {
 	Name() string
 	Type() AdapterType
-	Generator(addr *Addr) (ProxyAdapter, error)
+	Generator(metadata *Metadata) (ProxyAdapter, error)
 }
 
 // AdapterType is enum of adapter type

constant/metadata.go

@@ -28,8 +28,8 @@ func (n *NetWork) String() string {
 
 type SourceType int
 
-// Addr is used to store connection address
-type Addr struct {
+// Metadata is used to store connection address
+type Metadata struct {
 	NetWork  NetWork
 	Source   SourceType
 	AddrType int
@@ -38,7 +38,7 @@ type Addr struct {
 	Port     string
 }
 
-func (addr *Addr) String() string {
+func (addr *Metadata) String() string {
 	if addr.Host == "" {
 		return addr.IP.String()
 	}

constant/rule.go

@@ -33,7 +33,7 @@ func (rt RuleType) String() string {
 
 type Rule interface {
 	RuleType() RuleType
-	IsMatch(addr *Addr) bool
+	IsMatch(metadata *Metadata) bool
 	Adapter() string
 	Payload() string
 }