diff --git a/client.go b/client.go
index d22da0a..a46db0f 100755
--- a/client.go
+++ b/client.go
@@ -80,8 +80,8 @@ func (sc *Client) handShake() error {
 	return fmt.Errorf("password rejected")
 }
 
-// Dial dial to the addr from socks server
-// this is net.Dial style
+// Dial dial to the addr from socks server,
+// this is net.Dial style,
 // can call sc.Connect instead
 func (sc *Client) Dial(network, addr string) (net.Conn, error) {
 	switch network {
diff --git a/doc.go b/doc.go
new file mode 100644
index 0000000..2dec658
--- /dev/null
+++ b/doc.go
@@ -0,0 +1,101 @@
+/*
+package socks implement a socks4/4a/5 protocol server and client
+
+only support CONNECT command now
+
+server example:
+
+    // listen 1080 and act as socks server
+    // support socks4, socks4a and socks5
+
+    package main
+
+    import (
+        socks "github.com/fangdingjun/socks-go"
+        "log"
+        "net"
+        "time"
+    )
+
+    func main() {
+        conn, err := net.Listen("tcp", ":1080")
+        if err != nil {
+            log.Fatal(err)
+        }
+
+        for {
+            c, err := conn.Accept()
+            if err != nil {
+                log.Println(err)
+                continue
+            }
+
+            log.Printf("connected from %s", c.RemoteAddr())
+
+            d := net.Dialer{Timeout: 10 * time.Second}
+            s := socks.Conn{Conn: c, Dial: d.Dial}
+            go s.Serve()
+        }
+    }
+
+
+
+
+client example:
+
+    // visit https://www.google.com through socks proxy server
+
+    package main
+
+    import (
+        "bufio"
+        "crypto/tls"
+        socks "github.com/fangdingjun/socks-go"
+        "io"
+        "log"
+        "net"
+        "net/http"
+        "os"
+    )
+
+    func main() {
+        // connect to socks server
+        c, err := net.Dial("tcp", "localhost:1080")
+        if err != nil {
+            log.Fatal(err)
+        }
+        defer c.Close()
+
+        sc := &socks.Client{Conn: c}
+
+        // connect to remote server
+        if err := sc.Connect("www.google.com", 443); err != nil {
+            log.Fatal(err)
+        }
+
+        // tls
+        conn := tls.Client(sc, &tls.Config{ServerName: "www.google.com"})
+        if err := conn.Handshake(); err != nil {
+            log.Fatal(err)
+        }
+
+        // send http request
+        req, err := http.NewRequest("GET", "https://www.google.com/", nil)
+        if err != nil {
+            log.Fatal(err)
+        }
+        req.Write(conn)
+
+        bio := bufio.NewReader(conn)
+
+        // read response
+        res, err := http.ReadResponse(bio, req)
+        if err != nil {
+            log.Fatal(err)
+        }
+        defer res.Body.Close()
+
+        io.Copy(os.Stdout, res.Body)
+    }
+*/
+package socks
diff --git a/socks.go b/socks.go
index ffa89bc..edc7737 100755
--- a/socks.go
+++ b/socks.go
@@ -19,7 +19,7 @@ const (
 // DialFunc the function dial to remote
 type DialFunc func(network, addr string) (net.Conn, error)
 
-// Conn present a client connection
+// Conn present a socks connection
 type Conn struct {
 	net.Conn
 	// the function to dial to upstream server