/
proxy.go
186 lines (169 loc) · 3.58 KB
/
proxy.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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
package ssh_proxy
import (
"bytes"
"encoding/binary"
"fmt"
"io"
"net"
"time"
"workspace/many.program/code/common"
)
func (i *connect) socks5Proxy(conn net.Conn) {
defer func() {
if conn != nil {
_ = conn.Close()
}
}()
var b [1024]byte
n, err := conn.Read(b[:])
if err != nil {
if err!=io.EOF {
common.Error(i.Saddr,"目标数据读取失败", err.Error())
}
return
}
// if len(b[:])>0 {
// Log("数据:",string(b[:]))
// }
// log.Printf("% x", b[:n])
_, _ = conn.Write([]byte{0x05, 0x00})
n, err = conn.Read(b[:])
if err != nil{
if err!=io.EOF {
common.Error("第一次添加数据",i.Saddr,err.Error())
}
return
}
// log.Printf("% x", b[:n])
var addr string
switch b[3] {
case 0x01:
sip := sockIP{}
if err := binary.Read(bytes.NewReader(b[4:n]), binary.BigEndian, &sip); err != nil {
common.Error(i.Saddr,"请求解析错误", err.Error())
return
}
addr = sip.toAddr()
case 0x03:
host := string(b[5 : n-2])
var port uint16
err = binary.Read(bytes.NewReader(b[n-2:n]), binary.BigEndian, &port)
if err != nil {
common.Error(err)
return
}
addr = fmt.Sprintf("%s:%d", host, port)
}
if i.client==nil {
i.login(true)
}
server, err := i.client.Dial("tcp", addr)
defer func() {
if server!=nil {
_=server.Close()
}
}()
if err != nil {
common.Error("动态转发连接目标失败",err.Error())
return
}
_, _ = conn.Write([]byte{0x05, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})
go func() {
_, _ = io.Copy(server, conn)
}()
_, _ = io.Copy(conn, server)
}
// 本地转发
func (i *connect) localForward(conn net.Conn){
defer func() {
if conn != nil {
_ = conn.Close()
}
}()
if i.client==nil {
i.login(true)
}
server, err := i.client.Dial("tcp", i.Remote)
defer func() {
if server!=nil {
_=server.Close()
}
}()
if err != nil {
common.Error("本地转发,远程数据传输异常",err.Error())
return
}
go func() {
_, _ = io.Copy(server, conn)
}()
_, _ = io.Copy(conn, server)
}
// 本地转发,和动态转发通用函数
func (i *connect) socks5ProxyStart(fun func(conn net.Conn)) {
common.Log("本地端口监听...",i.Listen)
localServer, err := net.Listen("tcp", i.Listen)
defer func() {
if localServer != nil {
_ = localServer.Close()
}
}()
if err != nil {
common.Error(i.Saddr,"代理端口监听失败", err.Error())
return
}
common.Log("本地端口监听成功...",i.Listen)
if len(i.Son)>0{
go func() {
time.Sleep(1 * time.Second)
common.Log("开始创建子系统")
startAction(i.Son)
}()
}
for {
client, err := localServer.Accept()
if err != nil {
common.Error(i.Saddr,"tcp 数据获取失败", err.Error())
return
}
go fun(client)
}
}
func (ip sockIP) toAddr() string {
return fmt.Sprintf("%d.%d.%d.%d:%d", ip.A, ip.B, ip.C, ip.D, ip.PORT)
}
// 远程转发
func (i *connect) remoteForward(){
common.Log("远程转发端口监听",i.Remote)
if i.client==nil {
i.login(true)
}
server, err :=i.client.Listen("tcp",i.Remote)
if err != nil {
common.Error("建立远程端口失败",i.Remote,err.Error())
return
}
common.Log("远程转发端口监听成功",i.Remote)
for{
client, err := server.Accept()
if err != nil {
common.Error(i.Remote,"TCP 远程数据接受失败", err.Error())
return
}
go func(conn net.Conn) {
defer func() {
if conn != nil {
_ = conn.Close()
}
}()
server, err := net.Dial("tcp", i.Listen)
if err != nil {
common.Error(err.Error())
return
}
go func() {
_, _ = io.Copy(server, conn)
}()
_, _ = io.Copy(conn, server)
}(client)
}
}