-
Notifications
You must be signed in to change notification settings - Fork 8
/
shadowsocksr.go
127 lines (113 loc) · 3.33 KB
/
shadowsocksr.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
package outbound
import (
"context"
"fmt"
"net"
"strconv"
"github.com/Dreamacro/go-shadowsocks2/core"
"github.com/Dreamacro/go-shadowsocks2/shadowstream"
"github.com/StinkyPeach/bridge/component/dialer"
"github.com/StinkyPeach/bridge/component/ssr/obfs"
"github.com/StinkyPeach/bridge/component/ssr/protocol"
C "github.com/StinkyPeach/bridge/constant"
)
type ShadowSocksR struct {
*Base
cipher *core.StreamCipher
obfs obfs.Obfs
protocol protocol.Protocol
}
type ShadowSocksROption struct {
Name string `proxy:"name"`
Server string `proxy:"server"`
Port int `proxy:"port"`
Password string `proxy:"password"`
Cipher string `proxy:"cipher"`
Obfs string `proxy:"obfs"`
ObfsParam string `proxy:"obfs-param,omitempty"`
Protocol string `proxy:"protocol"`
ProtocolParam string `proxy:"protocol-param,omitempty"`
UDP bool `proxy:"udp,omitempty"`
}
func (ssr *ShadowSocksR) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
c = obfs.NewConn(c, ssr.obfs)
c = ssr.cipher.StreamConn(c)
conn, ok := c.(*shadowstream.Conn)
if !ok {
return nil, fmt.Errorf("invalid connection type")
}
iv, err := conn.ObtainWriteIV()
if err != nil {
return nil, err
}
c = protocol.NewConn(c, ssr.protocol, iv)
_, err = c.Write(serializesSocksAddr(metadata))
return c, err
}
func (ssr *ShadowSocksR) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
c, err := dialer.DialContext(ctx, "tcp", ssr.addr)
if err != nil {
return nil, fmt.Errorf("%s connect error: %w", ssr.addr, err)
}
tcpKeepAlive(c)
c, err = ssr.StreamConn(c, metadata)
return NewConn(c, ssr), err
}
func (ssr *ShadowSocksR) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
pc, err := dialer.ListenPacket("udp", "")
if err != nil {
return nil, err
}
addr, err := resolveUDPAddr("udp", ssr.addr)
if err != nil {
return nil, err
}
pc = ssr.cipher.PacketConn(pc)
pc = protocol.NewPacketConn(pc, ssr.protocol)
return newPacketConn(&ssPacketConn{PacketConn: pc, rAddr: addr}, ssr), nil
}
func NewShadowSocksR(option ShadowSocksROption) (*ShadowSocksR, error) {
addr := net.JoinHostPort(option.Server, strconv.Itoa(option.Port))
cipher := option.Cipher
password := option.Password
coreCiph, err := core.PickCipher(cipher, nil, password)
if err != nil {
return nil, fmt.Errorf("ssr %s initialize cipher error: %w", addr, err)
}
ciph, ok := coreCiph.(*core.StreamCipher)
if !ok {
return nil, fmt.Errorf("%s is not a supported stream cipher in ssr", cipher)
}
obfs, err := obfs.PickObfs(option.Obfs, &obfs.Base{
IVSize: ciph.IVSize(),
Key: ciph.Key,
HeadLen: 30,
Host: option.Server,
Port: option.Port,
Param: option.ObfsParam,
})
if err != nil {
return nil, fmt.Errorf("ssr %s initialize obfs error: %w", addr, err)
}
protocol, err := protocol.PickProtocol(option.Protocol, &protocol.Base{
IV: nil,
Key: ciph.Key,
TCPMss: 1460,
Param: option.ProtocolParam,
})
if err != nil {
return nil, fmt.Errorf("ssr %s initialize protocol error: %w", addr, err)
}
protocol.SetOverhead(obfs.GetObfsOverhead() + protocol.GetProtocolOverhead())
return &ShadowSocksR{
Base: &Base{
name: option.Name,
addr: addr,
tp: C.ShadowsocksR,
udp: option.UDP,
},
cipher: ciph,
obfs: obfs,
protocol: protocol,
}, nil
}