sing-box/transport/v2raywebsocket/conn.go

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package v2raywebsocket
import (
"encoding/base64"
"io"
"net"
"net/http"
"os"
"time"
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C "github.com/sagernet/sing-box/constant"
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E "github.com/sagernet/sing/common/exceptions"
"github.com/gorilla/websocket"
)
type WebsocketConn struct {
*websocket.Conn
remoteAddr net.Addr
reader io.Reader
}
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func (c *WebsocketConn) Close() error {
err := c.WriteControl(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, ""), time.Now().Add(C.TCPTimeout))
if err != nil {
return c.Conn.Close()
}
return nil
}
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func (c *WebsocketConn) Read(b []byte) (n int, err error) {
for {
if c.reader == nil {
_, c.reader, err = c.NextReader()
if err != nil {
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err = wrapError(err)
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return
}
}
n, err = c.reader.Read(b)
if E.IsMulti(err, io.EOF) {
c.reader = nil
continue
}
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err = wrapError(err)
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return
}
}
func (c *WebsocketConn) Write(b []byte) (n int, err error) {
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err = wrapError(c.WriteMessage(websocket.BinaryMessage, b))
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if err != nil {
return
}
return len(b), nil
}
func (c *WebsocketConn) RemoteAddr() net.Addr {
if c.remoteAddr != nil {
return c.remoteAddr
}
return c.Conn.RemoteAddr()
}
func (c *WebsocketConn) SetDeadline(t time.Time) error {
return os.ErrInvalid
}
type EarlyWebsocketConn struct {
*Client
conn *WebsocketConn
create chan struct{}
}
func (c *EarlyWebsocketConn) Read(b []byte) (n int, err error) {
if c.conn == nil {
<-c.create
}
return c.conn.Read(b)
}
func (c *EarlyWebsocketConn) Write(b []byte) (n int, err error) {
if c.conn != nil {
return c.conn.Write(b)
}
var (
earlyData []byte
lateData []byte
conn *websocket.Conn
response *http.Response
)
if len(earlyData) > int(c.maxEarlyData) {
earlyData = earlyData[:c.maxEarlyData]
lateData = lateData[c.maxEarlyData:]
} else {
earlyData = b
}
if len(earlyData) > 0 {
earlyDataString := base64.RawURLEncoding.EncodeToString(earlyData)
if c.earlyDataHeaderName == "" {
conn, response, err = c.dialer.Dial(c.uri+earlyDataString, c.headers)
} else {
headers := c.headers.Clone()
headers.Set(c.earlyDataHeaderName, earlyDataString)
conn, response, err = c.dialer.Dial(c.uri, headers)
}
} else {
conn, response, err = c.dialer.Dial(c.uri, c.headers)
}
if err != nil {
return 0, wrapDialError(response, err)
}
c.conn = &WebsocketConn{Conn: conn}
close(c.create)
if len(lateData) > 0 {
_, err = c.conn.Write(lateData)
}
if err != nil {
return
}
return len(b), nil
}
func (c *EarlyWebsocketConn) Close() error {
if c.conn == nil {
return nil
}
return c.conn.Close()
}
func (c *EarlyWebsocketConn) LocalAddr() net.Addr {
if c.conn == nil {
return nil
}
return c.conn.LocalAddr()
}
func (c *EarlyWebsocketConn) RemoteAddr() net.Addr {
if c.conn == nil {
return nil
}
return c.conn.RemoteAddr()
}
func (c *EarlyWebsocketConn) SetDeadline(t time.Time) error {
if c.conn == nil {
return os.ErrInvalid
}
return c.conn.SetDeadline(t)
}
func (c *EarlyWebsocketConn) SetReadDeadline(t time.Time) error {
if c.conn == nil {
return os.ErrInvalid
}
return c.conn.SetReadDeadline(t)
}
func (c *EarlyWebsocketConn) SetWriteDeadline(t time.Time) error {
if c.conn == nil {
return os.ErrInvalid
}
return c.conn.SetWriteDeadline(t)
}
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func wrapError(err error) error {
if websocket.IsCloseError(err, websocket.CloseNormalClosure) {
return net.ErrClosed
}
return err
}