/
freedom.go
152 lines (141 loc) · 4.93 KB
/
freedom.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
package conf
import (
"net"
"strconv"
"strings"
v2net "github.com/moqsien/xraycore/common/net"
"github.com/moqsien/xraycore/common/protocol"
"github.com/moqsien/xraycore/proxy/freedom"
"google.golang.org/protobuf/proto"
)
type FreedomConfig struct {
DomainStrategy string `json:"domainStrategy"`
Timeout *uint32 `json:"timeout"`
Redirect string `json:"redirect"`
UserLevel uint32 `json:"userLevel"`
Fragment *Fragment `json:"fragment"`
}
type Fragment struct {
Packets string `json:"packets"`
Length string `json:"length"`
Interval string `json:"interval"`
}
// Build implements Buildable
func (c *FreedomConfig) Build() (proto.Message, error) {
config := new(freedom.Config)
config.DomainStrategy = freedom.Config_AS_IS
switch strings.ToLower(c.DomainStrategy) {
case "useip", "use_ip", "use-ip":
config.DomainStrategy = freedom.Config_USE_IP
case "useip4", "useipv4", "use_ip4", "use_ipv4", "use_ip_v4", "use-ip4", "use-ipv4", "use-ip-v4":
config.DomainStrategy = freedom.Config_USE_IP4
case "useip6", "useipv6", "use_ip6", "use_ipv6", "use_ip_v6", "use-ip6", "use-ipv6", "use-ip-v6":
config.DomainStrategy = freedom.Config_USE_IP6
}
if c.Fragment != nil {
config.Fragment = new(freedom.Fragment)
var err, err2 error
switch strings.ToLower(c.Fragment.Packets) {
case "tlshello":
// TLS Hello Fragmentation (into multiple handshake messages)
config.Fragment.PacketsFrom = 0
config.Fragment.PacketsTo = 1
case "":
// TCP Segmentation (all packets)
config.Fragment.PacketsFrom = 0
config.Fragment.PacketsTo = 0
default:
// TCP Segmentation (range)
packetsFromTo := strings.Split(c.Fragment.Packets, "-")
if len(packetsFromTo) == 2 {
config.Fragment.PacketsFrom, err = strconv.ParseUint(packetsFromTo[0], 10, 64)
config.Fragment.PacketsTo, err2 = strconv.ParseUint(packetsFromTo[1], 10, 64)
} else {
config.Fragment.PacketsFrom, err = strconv.ParseUint(packetsFromTo[0], 10, 64)
config.Fragment.PacketsTo = config.Fragment.PacketsFrom
}
if err != nil {
return nil, newError("Invalid PacketsFrom").Base(err)
}
if err2 != nil {
return nil, newError("Invalid PacketsTo").Base(err2)
}
if config.Fragment.PacketsFrom > config.Fragment.PacketsTo {
config.Fragment.PacketsFrom, config.Fragment.PacketsTo = config.Fragment.PacketsTo, config.Fragment.PacketsFrom
}
if config.Fragment.PacketsFrom == 0 {
return nil, newError("PacketsFrom can't be 0")
}
}
{
if c.Fragment.Length == "" {
return nil, newError("Length can't be empty")
}
lengthMinMax := strings.Split(c.Fragment.Length, "-")
if len(lengthMinMax) == 2 {
config.Fragment.LengthMin, err = strconv.ParseUint(lengthMinMax[0], 10, 64)
config.Fragment.LengthMax, err2 = strconv.ParseUint(lengthMinMax[1], 10, 64)
} else {
config.Fragment.LengthMin, err = strconv.ParseUint(lengthMinMax[0], 10, 64)
config.Fragment.LengthMax = config.Fragment.LengthMin
}
if err != nil {
return nil, newError("Invalid LengthMin").Base(err)
}
if err2 != nil {
return nil, newError("Invalid LengthMax").Base(err2)
}
if config.Fragment.LengthMin > config.Fragment.LengthMax {
config.Fragment.LengthMin, config.Fragment.LengthMax = config.Fragment.LengthMax, config.Fragment.LengthMin
}
if config.Fragment.LengthMin == 0 {
return nil, newError("LengthMin can't be 0")
}
}
{
if c.Fragment.Interval == "" {
return nil, newError("Interval can't be empty")
}
intervalMinMax := strings.Split(c.Fragment.Interval, "-")
if len(intervalMinMax) == 2 {
config.Fragment.IntervalMin, err = strconv.ParseUint(intervalMinMax[0], 10, 64)
config.Fragment.IntervalMax, err2 = strconv.ParseUint(intervalMinMax[1], 10, 64)
} else {
config.Fragment.IntervalMin, err = strconv.ParseUint(intervalMinMax[0], 10, 64)
config.Fragment.IntervalMax = config.Fragment.IntervalMin
}
if err != nil {
return nil, newError("Invalid IntervalMin").Base(err)
}
if err2 != nil {
return nil, newError("Invalid IntervalMax").Base(err2)
}
if config.Fragment.IntervalMin > config.Fragment.IntervalMax {
config.Fragment.IntervalMin, config.Fragment.IntervalMax = config.Fragment.IntervalMax, config.Fragment.IntervalMin
}
}
}
if c.Timeout != nil {
config.Timeout = *c.Timeout
}
config.UserLevel = c.UserLevel
if len(c.Redirect) > 0 {
host, portStr, err := net.SplitHostPort(c.Redirect)
if err != nil {
return nil, newError("invalid redirect address: ", c.Redirect, ": ", err).Base(err)
}
port, err := v2net.PortFromString(portStr)
if err != nil {
return nil, newError("invalid redirect port: ", c.Redirect, ": ", err).Base(err)
}
config.DestinationOverride = &freedom.DestinationOverride{
Server: &protocol.ServerEndpoint{
Port: uint32(port),
},
}
if len(host) > 0 {
config.DestinationOverride.Server.Address = v2net.NewIPOrDomain(v2net.ParseAddress(host))
}
}
return config, nil
}