frp/pkg/plugin/client/https2https.go

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// Copyright 2019 fatedier, fatedier@gmail.com
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package plugin
import (
"crypto/tls"
"fmt"
"io"
"net"
"net/http"
"net/http/httputil"
v1 "github.com/fatedier/frp/pkg/config/v1"
"github.com/fatedier/frp/pkg/transport"
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utilnet "github.com/fatedier/frp/pkg/util/net"
)
func init() {
Register(v1.PluginHTTPS2HTTPS, NewHTTPS2HTTPSPlugin)
}
type HTTPS2HTTPSPlugin struct {
opts *v1.HTTPS2HTTPSPluginOptions
l *Listener
s *http.Server
}
func NewHTTPS2HTTPSPlugin(options v1.ClientPluginOptions) (Plugin, error) {
opts := options.(*v1.HTTPS2HTTPSPluginOptions)
listener := NewProxyListener()
p := &HTTPS2HTTPSPlugin{
opts: opts,
l: listener,
}
tr := &http.Transport{
TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
}
rp := &httputil.ReverseProxy{
Director: func(req *http.Request) {
req.URL.Scheme = "https"
req.URL.Host = p.opts.LocalAddr
if p.opts.HostHeaderRewrite != "" {
req.Host = p.opts.HostHeaderRewrite
}
for k, v := range p.opts.RequestHeaders.Set {
req.Header.Set(k, v)
}
},
Transport: tr,
}
p.s = &http.Server{
Handler: rp,
}
var (
tlsConfig *tls.Config
err error
)
if opts.CrtPath != "" || opts.KeyPath != "" {
tlsConfig, err = p.genTLSConfig()
} else {
tlsConfig, err = transport.NewServerTLSConfig("", "", "")
tlsConfig.InsecureSkipVerify = true
}
if err != nil {
return nil, fmt.Errorf("gen TLS config error: %v", err)
}
ln := tls.NewListener(listener, tlsConfig)
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go func() {
_ = p.s.Serve(ln)
}()
return p, nil
}
func (p *HTTPS2HTTPSPlugin) genTLSConfig() (*tls.Config, error) {
cert, err := tls.LoadX509KeyPair(p.opts.CrtPath, p.opts.KeyPath)
if err != nil {
return nil, err
}
config := &tls.Config{Certificates: []tls.Certificate{cert}}
return config, nil
}
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func (p *HTTPS2HTTPSPlugin) Handle(conn io.ReadWriteCloser, realConn net.Conn, _ []byte) {
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wrapConn := utilnet.WrapReadWriteCloserToConn(conn, realConn)
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_ = p.l.PutConn(wrapConn)
}
func (p *HTTPS2HTTPSPlugin) Name() string {
return v1.PluginHTTPS2HTTPS
}
func (p *HTTPS2HTTPSPlugin) Close() error {
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return p.s.Close()
}