virtual-net: initial (#4751)

pkg/config/v1/proxy_plugin.go

@@ -0,0 +1,195 @@
+// Copyright 2023 The frp Authors
+//
+// 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 v1
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"reflect"
+
+	"github.com/samber/lo"
+
+	"github.com/fatedier/frp/pkg/util/util"
+)
+
+const (
+	PluginHTTP2HTTPS       = "http2https"
+	PluginHTTPProxy        = "http_proxy"
+	PluginHTTPS2HTTP       = "https2http"
+	PluginHTTPS2HTTPS      = "https2https"
+	PluginHTTP2HTTP        = "http2http"
+	PluginSocks5           = "socks5"
+	PluginStaticFile       = "static_file"
+	PluginUnixDomainSocket = "unix_domain_socket"
+	PluginTLS2Raw          = "tls2raw"
+	PluginVirtualNet       = "virtual_net"
+)
+
+var clientPluginOptionsTypeMap = map[string]reflect.Type{
+	PluginHTTP2HTTPS:       reflect.TypeOf(HTTP2HTTPSPluginOptions{}),
+	PluginHTTPProxy:        reflect.TypeOf(HTTPProxyPluginOptions{}),
+	PluginHTTPS2HTTP:       reflect.TypeOf(HTTPS2HTTPPluginOptions{}),
+	PluginHTTPS2HTTPS:      reflect.TypeOf(HTTPS2HTTPSPluginOptions{}),
+	PluginHTTP2HTTP:        reflect.TypeOf(HTTP2HTTPPluginOptions{}),
+	PluginSocks5:           reflect.TypeOf(Socks5PluginOptions{}),
+	PluginStaticFile:       reflect.TypeOf(StaticFilePluginOptions{}),
+	PluginUnixDomainSocket: reflect.TypeOf(UnixDomainSocketPluginOptions{}),
+	PluginTLS2Raw:          reflect.TypeOf(TLS2RawPluginOptions{}),
+	PluginVirtualNet:       reflect.TypeOf(VirtualNetPluginOptions{}),
+}
+
+type ClientPluginOptions interface {
+	Complete()
+}
+
+type TypedClientPluginOptions struct {
+	Type string `json:"type"`
+	ClientPluginOptions
+}
+
+func (c *TypedClientPluginOptions) UnmarshalJSON(b []byte) error {
+	if len(b) == 4 && string(b) == "null" {
+		return nil
+	}
+
+	typeStruct := struct {
+		Type string `json:"type"`
+	}{}
+	if err := json.Unmarshal(b, &typeStruct); err != nil {
+		return err
+	}
+
+	c.Type = typeStruct.Type
+	if c.Type == "" {
+		return errors.New("plugin type is empty")
+	}
+
+	v, ok := clientPluginOptionsTypeMap[typeStruct.Type]
+	if !ok {
+		return fmt.Errorf("unknown plugin type: %s", typeStruct.Type)
+	}
+	options := reflect.New(v).Interface().(ClientPluginOptions)
+
+	decoder := json.NewDecoder(bytes.NewBuffer(b))
+	if DisallowUnknownFields {
+		decoder.DisallowUnknownFields()
+	}
+
+	if err := decoder.Decode(options); err != nil {
+		return fmt.Errorf("unmarshal ClientPluginOptions error: %v", err)
+	}
+	c.ClientPluginOptions = options
+	return nil
+}
+
+func (c *TypedClientPluginOptions) MarshalJSON() ([]byte, error) {
+	return json.Marshal(c.ClientPluginOptions)
+}
+
+type HTTP2HTTPSPluginOptions struct {
+	Type              string           `json:"type,omitempty"`
+	LocalAddr         string           `json:"localAddr,omitempty"`
+	HostHeaderRewrite string           `json:"hostHeaderRewrite,omitempty"`
+	RequestHeaders    HeaderOperations `json:"requestHeaders,omitempty"`
+}
+
+func (o *HTTP2HTTPSPluginOptions) Complete() {}
+
+type HTTPProxyPluginOptions struct {
+	Type         string `json:"type,omitempty"`
+	HTTPUser     string `json:"httpUser,omitempty"`
+	HTTPPassword string `json:"httpPassword,omitempty"`
+}
+
+func (o *HTTPProxyPluginOptions) Complete() {}
+
+type HTTPS2HTTPPluginOptions struct {
+	Type              string           `json:"type,omitempty"`
+	LocalAddr         string           `json:"localAddr,omitempty"`
+	HostHeaderRewrite string           `json:"hostHeaderRewrite,omitempty"`
+	RequestHeaders    HeaderOperations `json:"requestHeaders,omitempty"`
+	EnableHTTP2       *bool            `json:"enableHTTP2,omitempty"`
+	CrtPath           string           `json:"crtPath,omitempty"`
+	KeyPath           string           `json:"keyPath,omitempty"`
+}
+
+func (o *HTTPS2HTTPPluginOptions) Complete() {
+	o.EnableHTTP2 = util.EmptyOr(o.EnableHTTP2, lo.ToPtr(true))
+}
+
+type HTTPS2HTTPSPluginOptions struct {
+	Type              string           `json:"type,omitempty"`
+	LocalAddr         string           `json:"localAddr,omitempty"`
+	HostHeaderRewrite string           `json:"hostHeaderRewrite,omitempty"`
+	RequestHeaders    HeaderOperations `json:"requestHeaders,omitempty"`
+	EnableHTTP2       *bool            `json:"enableHTTP2,omitempty"`
+	CrtPath           string           `json:"crtPath,omitempty"`
+	KeyPath           string           `json:"keyPath,omitempty"`
+}
+
+func (o *HTTPS2HTTPSPluginOptions) Complete() {
+	o.EnableHTTP2 = util.EmptyOr(o.EnableHTTP2, lo.ToPtr(true))
+}
+
+type HTTP2HTTPPluginOptions struct {
+	Type              string           `json:"type,omitempty"`
+	LocalAddr         string           `json:"localAddr,omitempty"`
+	HostHeaderRewrite string           `json:"hostHeaderRewrite,omitempty"`
+	RequestHeaders    HeaderOperations `json:"requestHeaders,omitempty"`
+}
+
+func (o *HTTP2HTTPPluginOptions) Complete() {}
+
+type Socks5PluginOptions struct {
+	Type     string `json:"type,omitempty"`
+	Username string `json:"username,omitempty"`
+	Password string `json:"password,omitempty"`
+}
+
+func (o *Socks5PluginOptions) Complete() {}
+
+type StaticFilePluginOptions struct {
+	Type         string `json:"type,omitempty"`
+	LocalPath    string `json:"localPath,omitempty"`
+	StripPrefix  string `json:"stripPrefix,omitempty"`
+	HTTPUser     string `json:"httpUser,omitempty"`
+	HTTPPassword string `json:"httpPassword,omitempty"`
+}
+
+func (o *StaticFilePluginOptions) Complete() {}
+
+type UnixDomainSocketPluginOptions struct {
+	Type     string `json:"type,omitempty"`
+	UnixPath string `json:"unixPath,omitempty"`
+}
+
+func (o *UnixDomainSocketPluginOptions) Complete() {}
+
+type TLS2RawPluginOptions struct {
+	Type      string `json:"type,omitempty"`
+	LocalAddr string `json:"localAddr,omitempty"`
+	CrtPath   string `json:"crtPath,omitempty"`
+	KeyPath   string `json:"keyPath,omitempty"`
+}
+
+func (o *TLS2RawPluginOptions) Complete() {}
+
+type VirtualNetPluginOptions struct {
+	Type string `json:"type,omitempty"`
+}
+
+func (o *VirtualNetPluginOptions) Complete() {}