mirror of https://github.com/fatedier/frp
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
104 lines
1.9 KiB
104 lines
1.9 KiB
package net
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"net"
|
|
"net/http"
|
|
"net/url"
|
|
"time"
|
|
|
|
"golang.org/x/net/websocket"
|
|
)
|
|
|
|
var (
|
|
ErrWebsocketListenerClosed = errors.New("websocket listener closed")
|
|
)
|
|
|
|
const (
|
|
FrpWebsocketPath = "/~!frp"
|
|
)
|
|
|
|
type WebsocketListener struct {
|
|
ln net.Listener
|
|
acceptCh chan net.Conn
|
|
|
|
server *http.Server
|
|
httpMutex *http.ServeMux
|
|
}
|
|
|
|
// NewWebsocketListener to handle websocket connections
|
|
// ln: tcp listener for websocket connections
|
|
func NewWebsocketListener(ln net.Listener) (wl *WebsocketListener) {
|
|
wl = &WebsocketListener{
|
|
acceptCh: make(chan net.Conn),
|
|
}
|
|
|
|
muxer := http.NewServeMux()
|
|
muxer.Handle(FrpWebsocketPath, websocket.Handler(func(c *websocket.Conn) {
|
|
notifyCh := make(chan struct{})
|
|
conn := WrapCloseNotifyConn(c, func() {
|
|
close(notifyCh)
|
|
})
|
|
wl.acceptCh <- conn
|
|
<-notifyCh
|
|
}))
|
|
|
|
wl.server = &http.Server{
|
|
Addr: ln.Addr().String(),
|
|
Handler: muxer,
|
|
}
|
|
|
|
go wl.server.Serve(ln)
|
|
return
|
|
}
|
|
|
|
func ListenWebsocket(bindAddr string, bindPort int) (*WebsocketListener, error) {
|
|
tcpLn, err := net.Listen("tcp", fmt.Sprintf("%s:%d", bindAddr, bindPort))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
l := NewWebsocketListener(tcpLn)
|
|
return l, nil
|
|
}
|
|
|
|
func (p *WebsocketListener) Accept() (net.Conn, error) {
|
|
c, ok := <-p.acceptCh
|
|
if !ok {
|
|
return nil, ErrWebsocketListenerClosed
|
|
}
|
|
return c, nil
|
|
}
|
|
|
|
func (p *WebsocketListener) Close() error {
|
|
return p.server.Close()
|
|
}
|
|
|
|
func (p *WebsocketListener) Addr() net.Addr {
|
|
return p.ln.Addr()
|
|
}
|
|
|
|
// addr: domain:port
|
|
func ConnectWebsocketServer(addr string) (net.Conn, error) {
|
|
addr = "ws://" + addr + FrpWebsocketPath
|
|
uri, err := url.Parse(addr)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
origin := "http://" + uri.Host
|
|
cfg, err := websocket.NewConfig(addr, origin)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
cfg.Dialer = &net.Dialer{
|
|
Timeout: 10 * time.Second,
|
|
}
|
|
|
|
conn, err := websocket.DialConfig(cfg)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return conn, nil
|
|
}
|