add binder for connector

pkg/connector/socks/v5/metadata.go

@@ -9,11 +9,23 @@ import (
 	md "github.com/go-gost/gost/pkg/metadata"
 )
 
+const (
+	defaultTTL            = 60 * time.Second
+	defaultReadBufferSize = 4096
+	defaultReadQueueSize  = 128
+	defaultBacklog        = 128
+)
+
 type metadata struct {
 	connectTimeout time.Duration
 	User           *url.Userinfo
 	tlsConfig      *tls.Config
 	noTLS          bool
+
+	ttl            time.Duration
+	readBufferSize int
+	readQueueSize  int
+	backlog        int
 }
 
 func (c *socks5Connector) parseMetadata(md md.Metadata) (err error) {
@@ -21,6 +33,11 @@ func (c *socks5Connector) parseMetadata(md md.Metadata) (err error) {
 		connectTimeout = "timeout"
 		auth           = "auth"
 		noTLS          = "notls"
+
+		ttl            = "ttl"
+		readBufferSize = "readBufferSize"
+		readQueueSize  = "readQueueSize"
+		backlog        = "backlog"
 	)
 
 	if v := md.GetString(auth); v != "" {
@@ -35,5 +52,23 @@ func (c *socks5Connector) parseMetadata(md md.Metadata) (err error) {
 	c.md.connectTimeout = md.GetDuration(connectTimeout)
 	c.md.noTLS = md.GetBool(noTLS)
 
+	c.md.ttl = md.GetDuration(ttl)
+	if c.md.ttl <= 0 {
+		c.md.ttl = defaultTTL
+	}
+	c.md.readBufferSize = md.GetInt(readBufferSize)
+	if c.md.readBufferSize <= 0 {
+		c.md.readBufferSize = defaultReadBufferSize
+	}
+
+	c.md.readQueueSize = md.GetInt(readQueueSize)
+	if c.md.readQueueSize <= 0 {
+		c.md.readQueueSize = defaultReadQueueSize
+	}
+
+	c.md.backlog = md.GetInt(backlog)
+	if c.md.backlog <= 0 {
+		c.md.backlog = defaultBacklog
+	}
 	return
 }