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visitor.go
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visitor.go
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// Copyright 2018 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 config
import (
"fmt"
"reflect"
"strconv"
"github.com/fatedier/frp/models/consts"
ini "github.com/vaughan0/go-ini"
)
var (
visitorConfTypeMap map[string]reflect.Type
)
func init() {
visitorConfTypeMap = make(map[string]reflect.Type)
visitorConfTypeMap[consts.StcpProxy] = reflect.TypeOf(StcpVisitorConf{})
visitorConfTypeMap[consts.XtcpProxy] = reflect.TypeOf(XtcpVisitorConf{})
}
type VisitorConf interface {
GetBaseInfo() *BaseVisitorConf
Compare(cmp VisitorConf) bool
UnmarshalFromIni(prefix string, name string, section ini.Section) error
Check() error
}
func NewVisitorConfByType(cfgType string) VisitorConf {
v, ok := visitorConfTypeMap[cfgType]
if !ok {
return nil
}
cfg := reflect.New(v).Interface().(VisitorConf)
return cfg
}
func NewVisitorConfFromIni(prefix string, name string, section ini.Section) (cfg VisitorConf, err error) {
cfgType := section["type"]
if cfgType == "" {
err = fmt.Errorf("visitor [%s] type shouldn't be empty", name)
return
}
cfg = NewVisitorConfByType(cfgType)
if cfg == nil {
err = fmt.Errorf("visitor [%s] type [%s] error", name, cfgType)
return
}
if err = cfg.UnmarshalFromIni(prefix, name, section); err != nil {
return
}
if err = cfg.Check(); err != nil {
return
}
return
}
type BaseVisitorConf struct {
ProxyName string `json:"proxy_name"`
ProxyType string `json:"proxy_type"`
UseEncryption bool `json:"use_encryption"`
UseCompression bool `json:"use_compression"`
Role string `json:"role"`
Sk string `json:"sk"`
ServerName string `json:"server_name"`
BindAddr string `json:"bind_addr"`
BindPort int `json:"bind_port"`
}
func (cfg *BaseVisitorConf) GetBaseInfo() *BaseVisitorConf {
return cfg
}
func (cfg *BaseVisitorConf) compare(cmp *BaseVisitorConf) bool {
if cfg.ProxyName != cmp.ProxyName ||
cfg.ProxyType != cmp.ProxyType ||
cfg.UseEncryption != cmp.UseEncryption ||
cfg.UseCompression != cmp.UseCompression ||
cfg.Role != cmp.Role ||
cfg.Sk != cmp.Sk ||
cfg.ServerName != cmp.ServerName ||
cfg.BindAddr != cmp.BindAddr ||
cfg.BindPort != cmp.BindPort {
return false
}
return true
}
func (cfg *BaseVisitorConf) check() (err error) {
if cfg.Role != "visitor" {
err = fmt.Errorf("invalid role")
return
}
if cfg.BindAddr == "" {
err = fmt.Errorf("bind_addr shouldn't be empty")
return
}
if cfg.BindPort <= 0 {
err = fmt.Errorf("bind_port is required")
return
}
return
}
func (cfg *BaseVisitorConf) UnmarshalFromIni(prefix string, name string, section ini.Section) (err error) {
var (
tmpStr string
ok bool
)
cfg.ProxyName = prefix + name
cfg.ProxyType = section["type"]
if tmpStr, ok = section["use_encryption"]; ok && tmpStr == "true" {
cfg.UseEncryption = true
}
if tmpStr, ok = section["use_compression"]; ok && tmpStr == "true" {
cfg.UseCompression = true
}
cfg.Role = section["role"]
if cfg.Role != "visitor" {
return fmt.Errorf("Parse conf error: proxy [%s] incorrect role [%s]", name, cfg.Role)
}
cfg.Sk = section["sk"]
cfg.ServerName = prefix + section["server_name"]
if cfg.BindAddr = section["bind_addr"]; cfg.BindAddr == "" {
cfg.BindAddr = "127.0.0.1"
}
if tmpStr, ok = section["bind_port"]; ok {
if cfg.BindPort, err = strconv.Atoi(tmpStr); err != nil {
return fmt.Errorf("Parse conf error: proxy [%s] bind_port incorrect", name)
}
} else {
return fmt.Errorf("Parse conf error: proxy [%s] bind_port not found", name)
}
return nil
}
type StcpVisitorConf struct {
BaseVisitorConf
}
func (cfg *StcpVisitorConf) Compare(cmp VisitorConf) bool {
cmpConf, ok := cmp.(*StcpVisitorConf)
if !ok {
return false
}
if !cfg.BaseVisitorConf.compare(&cmpConf.BaseVisitorConf) {
return false
}
return true
}
func (cfg *StcpVisitorConf) UnmarshalFromIni(prefix string, name string, section ini.Section) (err error) {
if err = cfg.BaseVisitorConf.UnmarshalFromIni(prefix, name, section); err != nil {
return
}
return
}
func (cfg *StcpVisitorConf) Check() (err error) {
if err = cfg.BaseVisitorConf.check(); err != nil {
return
}
return
}
type XtcpVisitorConf struct {
BaseVisitorConf
}
func (cfg *XtcpVisitorConf) Compare(cmp VisitorConf) bool {
cmpConf, ok := cmp.(*XtcpVisitorConf)
if !ok {
return false
}
if !cfg.BaseVisitorConf.compare(&cmpConf.BaseVisitorConf) {
return false
}
return true
}
func (cfg *XtcpVisitorConf) UnmarshalFromIni(prefix string, name string, section ini.Section) (err error) {
if err = cfg.BaseVisitorConf.UnmarshalFromIni(prefix, name, section); err != nil {
return
}
return
}
func (cfg *XtcpVisitorConf) Check() (err error) {
if err = cfg.BaseVisitorConf.check(); err != nil {
return
}
return
}