mirror of
https://github.com/XTLS/Xray-core.git
synced 2024-11-15 05:03:20 +00:00
258 lines
7.8 KiB
Go
258 lines
7.8 KiB
Go
package conf
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import (
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"encoding/base64"
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"net"
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"strconv"
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"strings"
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"github.com/xtls/xray-core/common/errors"
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v2net "github.com/xtls/xray-core/common/net"
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"github.com/xtls/xray-core/common/protocol"
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"github.com/xtls/xray-core/proxy/freedom"
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"google.golang.org/protobuf/proto"
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)
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type FreedomConfig struct {
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DomainStrategy string `json:"domainStrategy"`
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Redirect string `json:"redirect"`
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UserLevel uint32 `json:"userLevel"`
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Fragment *Fragment `json:"fragment"`
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Noise *Noise `json:"noise"`
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Noises []*Noise `json:"noises"`
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ProxyProtocol uint32 `json:"proxyProtocol"`
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}
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type Fragment struct {
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Packets string `json:"packets"`
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Length string `json:"length"`
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Interval string `json:"interval"`
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}
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type Noise struct {
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Type string `json:"type"`
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Packet string `json:"packet"`
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Delay *Int32Range `json:"delay"`
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}
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// Build implements Buildable
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func (c *FreedomConfig) Build() (proto.Message, error) {
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config := new(freedom.Config)
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switch strings.ToLower(c.DomainStrategy) {
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case "asis", "":
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config.DomainStrategy = freedom.Config_AS_IS
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case "useip":
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config.DomainStrategy = freedom.Config_USE_IP
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case "useipv4":
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config.DomainStrategy = freedom.Config_USE_IP4
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case "useipv6":
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config.DomainStrategy = freedom.Config_USE_IP6
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case "useipv4v6":
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config.DomainStrategy = freedom.Config_USE_IP46
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case "useipv6v4":
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config.DomainStrategy = freedom.Config_USE_IP64
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case "forceip":
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config.DomainStrategy = freedom.Config_FORCE_IP
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case "forceipv4":
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config.DomainStrategy = freedom.Config_FORCE_IP4
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case "forceipv6":
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config.DomainStrategy = freedom.Config_FORCE_IP6
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case "forceipv4v6":
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config.DomainStrategy = freedom.Config_FORCE_IP46
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case "forceipv6v4":
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config.DomainStrategy = freedom.Config_FORCE_IP64
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default:
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return nil, errors.New("unsupported domain strategy: ", c.DomainStrategy)
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}
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if c.Fragment != nil {
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config.Fragment = new(freedom.Fragment)
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var err, err2 error
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switch strings.ToLower(c.Fragment.Packets) {
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case "tlshello":
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// TLS Hello Fragmentation (into multiple handshake messages)
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config.Fragment.PacketsFrom = 0
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config.Fragment.PacketsTo = 1
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case "":
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// TCP Segmentation (all packets)
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config.Fragment.PacketsFrom = 0
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config.Fragment.PacketsTo = 0
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default:
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// TCP Segmentation (range)
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packetsFromTo := strings.Split(c.Fragment.Packets, "-")
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if len(packetsFromTo) == 2 {
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config.Fragment.PacketsFrom, err = strconv.ParseUint(packetsFromTo[0], 10, 64)
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config.Fragment.PacketsTo, err2 = strconv.ParseUint(packetsFromTo[1], 10, 64)
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} else {
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config.Fragment.PacketsFrom, err = strconv.ParseUint(packetsFromTo[0], 10, 64)
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config.Fragment.PacketsTo = config.Fragment.PacketsFrom
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}
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if err != nil {
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return nil, errors.New("Invalid PacketsFrom").Base(err)
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}
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if err2 != nil {
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return nil, errors.New("Invalid PacketsTo").Base(err2)
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}
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if config.Fragment.PacketsFrom > config.Fragment.PacketsTo {
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config.Fragment.PacketsFrom, config.Fragment.PacketsTo = config.Fragment.PacketsTo, config.Fragment.PacketsFrom
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}
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if config.Fragment.PacketsFrom == 0 {
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return nil, errors.New("PacketsFrom can't be 0")
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}
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}
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{
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if c.Fragment.Length == "" {
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return nil, errors.New("Length can't be empty")
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}
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lengthMinMax := strings.Split(c.Fragment.Length, "-")
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if len(lengthMinMax) == 2 {
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config.Fragment.LengthMin, err = strconv.ParseUint(lengthMinMax[0], 10, 64)
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config.Fragment.LengthMax, err2 = strconv.ParseUint(lengthMinMax[1], 10, 64)
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} else {
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config.Fragment.LengthMin, err = strconv.ParseUint(lengthMinMax[0], 10, 64)
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config.Fragment.LengthMax = config.Fragment.LengthMin
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}
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if err != nil {
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return nil, errors.New("Invalid LengthMin").Base(err)
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}
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if err2 != nil {
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return nil, errors.New("Invalid LengthMax").Base(err2)
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}
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if config.Fragment.LengthMin > config.Fragment.LengthMax {
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config.Fragment.LengthMin, config.Fragment.LengthMax = config.Fragment.LengthMax, config.Fragment.LengthMin
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}
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if config.Fragment.LengthMin == 0 {
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return nil, errors.New("LengthMin can't be 0")
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}
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}
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{
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if c.Fragment.Interval == "" {
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return nil, errors.New("Interval can't be empty")
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}
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intervalMinMax := strings.Split(c.Fragment.Interval, "-")
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if len(intervalMinMax) == 2 {
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config.Fragment.IntervalMin, err = strconv.ParseUint(intervalMinMax[0], 10, 64)
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config.Fragment.IntervalMax, err2 = strconv.ParseUint(intervalMinMax[1], 10, 64)
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} else {
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config.Fragment.IntervalMin, err = strconv.ParseUint(intervalMinMax[0], 10, 64)
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config.Fragment.IntervalMax = config.Fragment.IntervalMin
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}
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if err != nil {
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return nil, errors.New("Invalid IntervalMin").Base(err)
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}
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if err2 != nil {
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return nil, errors.New("Invalid IntervalMax").Base(err2)
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}
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if config.Fragment.IntervalMin > config.Fragment.IntervalMax {
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config.Fragment.IntervalMin, config.Fragment.IntervalMax = config.Fragment.IntervalMax, config.Fragment.IntervalMin
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}
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}
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}
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if c.Noise != nil {
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return nil, errors.PrintRemovedFeatureError("noise = { ... }", "noises = [ { ... } ]")
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}
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if c.Noises != nil {
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for _, n := range c.Noises {
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NConfig, err := ParseNoise(n)
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if err != nil {
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return nil, err
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}
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config.Noises = append(config.Noises, NConfig)
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}
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}
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config.UserLevel = c.UserLevel
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if len(c.Redirect) > 0 {
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host, portStr, err := net.SplitHostPort(c.Redirect)
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if err != nil {
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return nil, errors.New("invalid redirect address: ", c.Redirect, ": ", err).Base(err)
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}
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port, err := v2net.PortFromString(portStr)
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if err != nil {
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return nil, errors.New("invalid redirect port: ", c.Redirect, ": ", err).Base(err)
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}
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config.DestinationOverride = &freedom.DestinationOverride{
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Server: &protocol.ServerEndpoint{
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Port: uint32(port),
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},
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}
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if len(host) > 0 {
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config.DestinationOverride.Server.Address = v2net.NewIPOrDomain(v2net.ParseAddress(host))
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}
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}
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if c.ProxyProtocol > 0 && c.ProxyProtocol <= 2 {
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config.ProxyProtocol = c.ProxyProtocol
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}
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return config, nil
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}
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func ParseNoise(noise *Noise) (*freedom.Noise, error) {
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var err, err2 error
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NConfig := new(freedom.Noise)
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switch strings.ToLower(noise.Type) {
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case "rand":
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randValue := strings.Split(noise.Packet, "-")
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if len(randValue) > 2 {
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return nil, errors.New("Only 2 values are allowed for rand")
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}
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if len(randValue) == 2 {
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NConfig.LengthMin, err = strconv.ParseUint(randValue[0], 10, 64)
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NConfig.LengthMax, err2 = strconv.ParseUint(randValue[1], 10, 64)
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}
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if len(randValue) == 1 {
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NConfig.LengthMin, err = strconv.ParseUint(randValue[0], 10, 64)
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NConfig.LengthMax = NConfig.LengthMin
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}
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if err != nil {
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return nil, errors.New("invalid value for rand LengthMin").Base(err)
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}
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if err2 != nil {
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return nil, errors.New("invalid value for rand LengthMax").Base(err2)
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}
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if NConfig.LengthMin > NConfig.LengthMax {
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NConfig.LengthMin, NConfig.LengthMax = NConfig.LengthMax, NConfig.LengthMin
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}
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if NConfig.LengthMin == 0 {
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return nil, errors.New("rand lengthMin or lengthMax cannot be 0")
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}
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case "str":
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//user input string
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NConfig.StrNoise = []byte(strings.TrimSpace(noise.Packet))
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case "base64":
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//user input base64
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NConfig.StrNoise, err = base64.StdEncoding.DecodeString(strings.TrimSpace(noise.Packet))
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if err != nil {
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return nil, errors.New("Invalid base64 string")
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}
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default:
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return nil, errors.New("Invalid packet,only rand,str,base64 are supported")
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}
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if noise.Delay != nil {
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if noise.Delay.From != 0 && noise.Delay.To != 0 {
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NConfig.DelayMin = uint64(noise.Delay.From)
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NConfig.DelayMax = uint64(noise.Delay.To)
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if NConfig.DelayMin > NConfig.LengthMax {
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NConfig.DelayMin, NConfig.DelayMax = NConfig.LengthMax, NConfig.DelayMin
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}
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} else {
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return nil, errors.New("DelayMin or DelayMax cannot be zero")
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}
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} else {
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NConfig.DelayMin = 0
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NConfig.DelayMax = 0
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}
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return NConfig, nil
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}
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