├── .gitignore ├── .goreleaser.yml ├── LICENSE ├── README.md ├── client └── flyclient.go ├── cmd ├── client │ └── client.go └── server │ └── server.go ├── fly ├── buf_pipe.go ├── cipher.go ├── cipher_test.go ├── conn.go ├── error_utils.go ├── http.go ├── logs.go ├── net_utils.go ├── pac.go ├── pac_test.go ├── portforward.go ├── relay.go └── socks5.go ├── flynet.conf ├── go.mod ├── go.sum └── server └── flyserver.go /.gitignore: -------------------------------------------------------------------------------- 1 | /.idea 2 | /dist 3 | /test.go 4 | /flynet.pac 5 | /cmd/client/client.exe 6 | /cmd/client/client 7 | /cmd/client/client_linux_amd64 8 | /cmd/client/auto-build.bat 9 | /cmd/server/server.exe 10 | /cmd/server/server 11 | /cmd/server/server_flynet 12 | /cmd/server/auto-build.bat 13 | 14 | /cmd/server/build.sh 15 | 16 | /.DS_Store -------------------------------------------------------------------------------- /.goreleaser.yml: -------------------------------------------------------------------------------- 1 | 2 | builds: 3 | - 4 | binary: client-flynet 5 | id: client-flynet 6 | main: ./cmd/client/client.go 7 | goos: 8 | - windows 9 | - darwin 10 | - linux 11 | - freebsd 12 | goarch: 13 | - amd64 14 | - 386 15 | - arm 16 | - mipsle 17 | - 18 | binary: server-flynet 19 | id: server-flynet 20 | main: ./cmd/server/server.go 21 | goos: 22 | - windows 23 | - darwin 24 | - linux 25 | - freebsd 26 | goarch: 27 | - amd64 28 | - 386 29 | - arm 30 | - mipsle 31 | 32 | archives: 33 | - 34 | files: 35 | - flynet.conf 36 | - README.md 37 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # flynet 2 | [![release][1]][4] [![size][2]][5] [![License][3]][6] 3 | 4 | [1]: https://img.shields.io/github/v/release/asche910/flynet 5 | [2]: https://img.shields.io/github/repo-size/asche910/flynet 6 | [3]: https://img.shields.io/github/license/asche910/flynet 7 | [4]: https://github.com/asche910/flynet/releases 8 | [5]: https://github.com/asche910/flynet 9 | [6]: https://github.com/asche910/flynet/blob/master/LICENSE 10 | 11 | 12 | 13 | ## Features 14 | [flynet](https://github.com/asche910/flynet) Is a command-line tool written in Golang language, currently supported features include： 15 | 16 | * [Http proxy](#Http-Proxy) 17 | * [Local Socks5 proxy](#Local-Socks5-Proxy) 18 | * [C/S mode of Socks5 proxy by TCP](#CS-mode-of-Socks5-proxy-by-TCP) 19 | * [C/S mode of Socks5 proxy by UDP](#CS-mode-of-Socks5-proxy-by-UDP) 20 | * [NAT traversal](#NAT-traversal) 21 | * ... 22 | 23 | The project is currently divided into the client and the sever. The http and local socks5 proxy, both sides of flynet support. The other functions need to be used at both sides. 24 | 25 | ## Getting Started 26 | ### Installing 27 | There are two ways to install 28 | 29 | ##### Download from [Releases Page](https://github.com/asche910/flynet/releases) 30 | Go to the [Releases Page](https://github.com/asche910/flynet/releases), download the corresponding version 31 | 32 | 33 | ##### Build from source 34 | 35 | ```shell 36 | go get -u -v github.com/asche910/flynet 37 | ``` 38 | In windows system，```.\client.exe ...```or ```.\server.exe ...``` 39 | 40 | and linux system， ```./server ...``` or ```./client ...``` 41 | 42 | will show like this ```server ...``` or ```client ...``` in the following article 43 | 44 | after run this command, it should output some messages like this: 45 | ``` 46 | Usage: flynet [options] 47 | -M, --mode choose which mode to run. the mode must be one of['http', 'socks5', 48 | 'socks5-tcp', 'socks5-udp', 'forward'] 49 | -L, --listen choose which port(s) to listen or forward 50 | -S, --server the server address client connect to 51 | -m, --method choose a encrypt method, which must be one of ['aes-128-cfb','aes-192-cfb', 52 | 'aes-256-cfb', 'aes-128-ctr', 'aes-192-ctr', 'aes-256-ctr', 'rc4-md5', 53 | 'rc4-md5-6', 'chacha20', 'chacha20-ietf'], default is 'aes-256-cfb' 54 | -P, --password password of server 55 | -p, --pac having this flag, pac-mode will open 56 | -C, --config read from config file 57 | -V, --verbose output detail info 58 | -l, --log output detail info to log file 59 | -H, --help show detail usage 60 | 61 | Mail bug reports and suggestions to 62 | or github: https://github.com/asche910/flynet 63 | ``` 64 | 65 | ### Http Proxy 66 | 67 | The http proxy directly opens the Http proxy on this machine. Both the client and the server support it. The commands are as follows: 68 | 69 | ``` 70 | server -M http -L 8848 71 | ``` 72 | or 73 | ``` 74 | client -M http -L 8848 75 | ``` 76 | It means that the Http proxy service is enabled on the port of 8848. If there is no output, it means the startup is successful. After all, one of philosophies of linux is: 77 | 78 | > No news is good news 79 | 80 | Of course, if you still want to see some messages, you could run this command with options, like ```-V``` or ```--verbose```, which will output detail message to the terminal. 81 | and the option ```-l``` or ```--log```will write message to the file named 'flynet.log'. of course you can also indicate the file name after the option 82 | 83 | ### Local Socks5 Proxy 84 | 85 | It is very simple to start the socks5 proxy on this machine. Both the client and the server support it. The commands are as follows: 86 | 87 | ``` 88 | server -M socks5 -L 1080 89 | ``` 90 | or 91 | ``` 92 | client -M socks5 -L 1080 93 | ``` 94 | This means that the socks5 proxy is enabled on the port 1080 of the machine, and then Chrome can work well with **Switchy Omega**. 95 | 96 | ### C/S mode of Socks5 proxy by TCP 97 | 98 | The previous one is the socks5 agent on the local, this one is the socks5 proxy that the client and the server cooperate with each other, and the middle is transmitted by the **TCP** protocol. 99 | The usage is as follows: 100 | 101 | **Server** 102 | ``` 103 | server -M socks5-tcp -L 8888 104 | ``` 105 | **Client** 106 | ``` 107 | client -M socks5-tcp -L 1080 -S example.com:8888 108 | ``` 109 | 110 | 111 | The example here is to assume that my server domain name is example.com ( you can also use ip directly:`-S xxx.xxx.xxx.xxx:8888`), then the client starts the socks5 proxy on port 1080, 112 | and then the traffic is forwarded to the server's 8888 port by TCP, and the server requests the corresponding target website. Return the result of the request to the client. 113 | The intermediate traffic is encrypted (default method is "aes-256-cfb") to ensure the security of the transmission. 114 | If you want, you can add more options, like 115 | * ```-P password``` add a password as the key for encryption or decryption 116 | * ```-m method``` use different encrypt method to encrypt your traffic 117 | * ```-p``` adding this on client side will start **PAC** mode. but you should setting the url as System auto proxy url manually 118 | 119 | If you feel that it is too much trouble to enter a bunch of parameters every time，you can just use ```-C flynet.cnnf``` to load a config file in your current directory 120 | 121 | ### C/S mode of Socks5 proxy by UDP 122 | 123 | This is very similar to the above tcp. The difference is that this is sending and receiving all packets through kcp (UDP) not TCP. 124 | After all, UDP has its own advantages in some aspects, and some important protocols mainly use udp transmission, such as the DNS protocol. 125 | One of uses is that you can have free internet access **without authentication** when using **campus-wifi** or **public-wifi**. 126 | Here's a look at the specific usage: 127 | 128 | **Server** 129 | ``` 130 | server -M socks5-udp -L 53 131 | ``` 132 | **Client** 133 | ``` 134 | client -M socks5-udp -L 8848 -S example.com:53 135 | ``` 136 | 137 | Here also take the domain name example.com and port 53 as examples.The client opens the socks5 proxy on udp port 53, and then all traffic 138 | is transmitted to the server port 53 through the udp mode. After receiving the request, the server then requests all requests. 139 | Send to the target website and return the results to the client in udp mode. The same is that all traffic is encrypted. 140 | 141 | ### NAT traversal 142 | 143 | > Network address translator traversal is a computer networking technique of establishing and maintaining Internet protocol connections across gateways that implement network address translation (NAT). 144 | 145 | To put it simply, the external network can access the machines in the internal network. What the tool does here is to map a port 146 | on the intranet to a port on the server, so that by accessing a port on the server, you can indirectly access the port in the intranet. 147 | Methods as below: 148 | 149 | **Server** 150 | ``` 151 | server -M forward -L 8888 8080 152 | ``` 153 | **Client** 154 | ``` 155 | server -M forward -L 80 -S example.com:8888 156 | ``` 157 | 158 | Also assume that the server domain name is example.com. The goal is mapping the port 80 of the client to the server port 8080. the middle of the data transmission is done through the server listening 8888. 159 | Then we visit example.com:8080 could see the content on the client port 80. 160 | 161 | ## Conclusion 162 | 163 | The current function of the project is relatively limited, and more functions should be added in the future. 164 | If the project is useful to you, a **star** is best favour for me! 165 | -------------------------------------------------------------------------------- /client/flyclient.go: -------------------------------------------------------------------------------- 1 | package client 2 | 3 | import "github.com/asche910/flynet/fly" 4 | 5 | type FlyClient struct { 6 | Mode int 7 | //localhost string 8 | Ports []string // ports[0] stands for the listening port; others are for reserve 9 | Method string 10 | Password string 11 | //protocol string // tcp or udp protocol 12 | ServerAddr string 13 | PACMode bool 14 | } 15 | 16 | func (client *FlyClient) LocalSocks5Proxy(port string) { 17 | fly.StartSocks5(port) 18 | } 19 | 20 | func (client *FlyClient) LocalHttpProxy(port string) { 21 | fly.StartHttp(port) 22 | } 23 | 24 | func (client *FlyClient) Socks5ProxyForTCP(localPort, serverAddr, method, key string, pacMode bool) { 25 | fly.Socks5ForClientByTCP(localPort, serverAddr, method, key, pacMode) 26 | } 27 | 28 | func (client *FlyClient) Socks5ProxyForUDP(localPort, serverAddr string) { 29 | fly.Socks5ForClientByUDP(localPort, serverAddr) 30 | } 31 | 32 | func (client *FlyClient) PortForward(laborPort, serverAddr string) { 33 | fly.PortForwardForClient(laborPort, serverAddr) 34 | } 35 | -------------------------------------------------------------------------------- /cmd/client/client.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "fmt" 5 | "github.com/asche910/flynet/client" 6 | "github.com/asche910/flynet/fly" 7 | "gopkg.in/ini.v1" 8 | "os" 9 | "strings" 10 | ) 11 | 12 | var ( 13 | flyClient = client.FlyClient{} 14 | ModeMap = map[int]string{1: "http", 2: "socks5", 3: "socks5-tcp", 4: "socks5-udp", 5: "forward"} 15 | ) 16 | 17 | func main() { 18 | if len(os.Args) < 2 { 19 | printHelp() 20 | return 21 | } 22 | parseArgs(os.Args[1:]) 23 | checkArgs() 24 | initLog() 25 | 26 | switch flyClient.Mode { 27 | case 1: 28 | flyClient.LocalHttpProxy(flyClient.Ports[0]) 29 | case 2: 30 | flyClient.LocalSocks5Proxy(flyClient.Ports[0]) 31 | case 3: 32 | flyClient.Socks5ProxyForTCP(flyClient.Ports[0], flyClient.ServerAddr, flyClient.Method, flyClient.Password, flyClient.PACMode) 33 | case 4: 34 | flyClient.Socks5ProxyForUDP(flyClient.Ports[0], flyClient.ServerAddr) 35 | case 5: 36 | ports := flyClient.Ports 37 | flyClient.PortForward(ports[0], flyClient.ServerAddr) 38 | default: 39 | fmt.Println("flynet: unknown error!") 40 | os.Exit(1) 41 | } 42 | } 43 | 44 | func printHelp() { 45 | fmt.Println(`Usage: flynet [options] 46 | -M, --mode choose which mode to run. the mode must be one of['http', 'socks5', 47 | 'socks5-tcp', 'socks5-udp', 'forward'] 48 | -L, --listen choose which port(s) to listen or forward 49 | -S, --server the server address client connect to 50 | -m, --method choose a encrypt method, which must be one of ['aes-128-cfb','aes-192-cfb', 51 | 'aes-256-cfb', 'aes-128-ctr', 'aes-192-ctr', 'aes-256-ctr', 'rc4-md5', 52 | 'rc4-md5-6', 'chacha20', 'chacha20-ietf'], default is 'aes-256-cfb' 53 | -P, --password password of server 54 | -p, --pac having this flag, pac-mode will open 55 | -C, --config read from config file 56 | -V, --verbose output detail info 57 | -l, --log output detail info to log file, which if not indicated "flynet.log" will 58 | be default 59 | -H, --help show detail usage 60 | 61 | Mail bug reports and suggestions to 62 | or github: https://github.com/asche910/flynet`) 63 | } 64 | 65 | func parseArgs(args []string) { 66 | if len(args) < 1 { 67 | return 68 | } 69 | switch args[0] { 70 | case "--mode", "-M": 71 | if len(args) > 1 { 72 | switch args[1] { 73 | case ModeMap[1]: 74 | flyClient.Mode = 1 75 | case ModeMap[2], "socks": 76 | flyClient.Mode = 2 77 | case ModeMap[3], "socks-tcp": 78 | flyClient.Mode = 3 79 | case ModeMap[4], "socks-udp": 80 | flyClient.Mode = 4 81 | case ModeMap[5]: 82 | flyClient.Mode = 5 83 | default: 84 | fmt.Println("flynet: no correct mode found!") 85 | printHelp() 86 | os.Exit(1) 87 | } 88 | parseArgs(args[2:]) 89 | } else { 90 | fmt.Println("flynet: no detail mode found!") 91 | printHelp() 92 | os.Exit(1) 93 | } 94 | case "--listen", "-L": 95 | if hasNAttributes(args, 1) { 96 | fly.CheckPort(args[1]) 97 | if hasNAttributes(args, 2) { 98 | fly.CheckPort(args[2]) 99 | flyClient.Ports = []string{args[1], args[2]} 100 | parseArgs(args[3:]) 101 | } else { 102 | flyClient.Ports = []string{args[1]} 103 | parseArgs(args[2:]) 104 | } 105 | } else { 106 | fmt.Println("flynet: no port found!") 107 | printHelp() 108 | os.Exit(1) 109 | } 110 | case "--server", "-S": 111 | if hasNAttributes(args, 1) { 112 | flyClient.ServerAddr = args[1] 113 | parseArgs(args[2:]) 114 | } else { 115 | fmt.Println("flynet: no correct serverAddr found!") 116 | printHelp() 117 | os.Exit(1) 118 | } 119 | case "--method", "-m": 120 | if hasNAttributes(args, 1) { 121 | flyClient.Method = args[1] 122 | parseArgs(args[2:]) 123 | } else { 124 | fmt.Println("flynet: no password found!") 125 | printHelp() 126 | os.Exit(1) 127 | } 128 | case "--password", "-P": 129 | if hasNAttributes(args, 1) { 130 | flyClient.Password = args[1] 131 | parseArgs(args[2:]) 132 | } else { 133 | fmt.Println("flynet: no password found!") 134 | printHelp() 135 | os.Exit(1) 136 | } 137 | case "--pac", "-p": 138 | flyClient.PACMode = true 139 | parseArgs(args[1:]) 140 | case "--config", "-C": 141 | if hasNAttributes(args, 1) { 142 | readConfig(args[1]) 143 | } else { 144 | fmt.Println("flynet: no config file found!") 145 | printHelp() 146 | os.Exit(1) 147 | } 148 | case "--verbose", "-V": 149 | fly.EnableDebug(true) 150 | parseArgs(args[1:]) 151 | case "--logs", "-l": 152 | if len(args) > 1 && !strings.HasPrefix(args[1], "-") { 153 | fly.SetLogName(args[1]) 154 | } 155 | fly.EnableLog(true) 156 | parseArgs(args[1:]) 157 | case "--help", "-H": 158 | printHelp() 159 | parseArgs(args[1:]) 160 | os.Exit(0) 161 | default: 162 | fmt.Println("flynet: please input correct command!") 163 | printHelp() 164 | os.Exit(1) 165 | } 166 | } 167 | 168 | // judge if the current args option has n attributes at least. 169 | // for example: 170 | // args = []string{"--listen", "1080", "8888"} 171 | // hasNAttributes(args, 2) will return true 172 | func hasNAttributes(args []string, n int) bool { 173 | if len(args) > n { 174 | for i := 1; i <= n; i++ { 175 | if strings.HasPrefix(args[i], "-") { 176 | return false 177 | } 178 | } 179 | return true 180 | } 181 | return false 182 | } 183 | 184 | func checkArgs() { 185 | mode := flyClient.Mode 186 | if mode == 0 { 187 | fmt.Println("Please choose a mode!") 188 | printHelp() 189 | os.Exit(1) 190 | } else if mode == 3 || mode == 4 || mode == 5 { 191 | if flyClient.ServerAddr == "" { 192 | fmt.Println("flynet: please input serverAddr!") 193 | printHelp() 194 | os.Exit(1) 195 | } 196 | } 197 | 198 | if len(flyClient.Ports) != 1 { 199 | fmt.Println("flynet: please choose a port!") 200 | printHelp() 201 | os.Exit(1) 202 | } 203 | } 204 | 205 | // load config file 206 | func readConfig(path string) { 207 | conf, err := ini.Load(path) 208 | if err != nil { 209 | fmt.Println("load config file fail --->", err) 210 | fmt.Println("you could refer to the example config file: https://github.com/asche910/flynet") 211 | os.Exit(1) 212 | } 213 | section, err := conf.NewSection("client") 214 | if err != nil { 215 | fmt.Println("read client tag failed --->", err) 216 | } 217 | mode := getAttr(section, "mode") 218 | port := getAttr(section, "port") 219 | serverAddr := getAttr(section, "serverAddr") 220 | method := getAttr(section, "method") 221 | password := getAttr(section, "password") 222 | pacOn := getAttr(section, "pac-mode") 223 | verbose := getAttr(section, "verbose") 224 | logs := getAttr(section, "log") 225 | 226 | switch mode { 227 | case ModeMap[1]: 228 | flyClient.Mode = 1 229 | case ModeMap[2], "socks": 230 | flyClient.Mode = 2 231 | case ModeMap[3], "socks-tcp": 232 | flyClient.Mode = 3 233 | case ModeMap[4], "socks-udp": 234 | flyClient.Mode = 4 235 | case ModeMap[5]: 236 | flyClient.Mode = 5 237 | default: 238 | fmt.Println("flynet: no correct mode found!") 239 | printHelp() 240 | os.Exit(1) 241 | } 242 | 243 | fly.CheckPort(port) 244 | flyClient.Ports = []string{port} 245 | flyClient.ServerAddr = serverAddr 246 | flyClient.Method = method 247 | flyClient.Password = password 248 | 249 | if pacOn == "true" { 250 | flyClient.PACMode = true 251 | } 252 | 253 | if verbose == "true" { 254 | fly.EnableDebug(true) 255 | } 256 | 257 | if logs != "" { 258 | fly.SetLogName(logs) 259 | fly.EnableLog(true) 260 | } 261 | } 262 | 263 | // read attr from config file 264 | func getAttr(section *ini.Section, name string) string { 265 | key, e := section.GetKey(name) 266 | if e != nil { 267 | return "" 268 | } 269 | return key.String() 270 | } 271 | 272 | func initLog() { 273 | fly.InitLog() 274 | } 275 | -------------------------------------------------------------------------------- /cmd/server/server.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "fmt" 5 | "github.com/asche910/flynet/fly" 6 | "github.com/asche910/flynet/server" 7 | "gopkg.in/ini.v1" 8 | "os" 9 | "strings" 10 | ) 11 | 12 | var ( 13 | flyServer = server.FlyServer{} 14 | ModeMap = map[int]string{1: "http", 2: "socks5", 3: "socks5-tcp", 4: "socks5-udp", 5: "forward"} 15 | ) 16 | 17 | func main() { 18 | if len(os.Args) < 2 { 19 | printHelp() 20 | return 21 | } 22 | parseArgs(os.Args[1:]) 23 | checkArgs() 24 | initLog() 25 | 26 | switch flyServer.Mode { 27 | case 1: 28 | flyServer.LocalHttpProxy(flyServer.Ports[0]) 29 | case 2: 30 | flyServer.LocalSocks5Proxy(flyServer.Ports[0]) 31 | case 3: 32 | flyServer.Socks5ProxyForTCP(flyServer.Ports[0], flyServer.Method, flyServer.Password) 33 | case 4: 34 | flyServer.Socks5ProxyForUDP(flyServer.Ports[0]) 35 | case 5: 36 | ports := flyServer.Ports 37 | flyServer.PortForward(ports[0], ports[1]) 38 | default: 39 | fmt.Println("flynet: unknown error!") 40 | os.Exit(1) 41 | } 42 | } 43 | 44 | func printHelp() { 45 | fmt.Println(`Usage: flynet [options] 46 | -M, --mode choose which mode to run. the mode must be one of['http', 'socks5', 47 | 'socks5-tcp', 'socks5-udp', 'forward'] 48 | -L, --listen choose which port(s) to listen or forward 49 | -m, --method choose a encrypt method, which must be one of ['aes-128-cfb','aes-192-cfb', 50 | 'aes-256-cfb', 'aes-128-ctr', 'aes-192-ctr', 'aes-256-ctr', 'rc4-md5', 51 | 'rc4-md5-6', 'chacha20', 'chacha20-ietf'], default is 'aes-256-cfb' 52 | -P, --password password for client to connect 53 | -C, --config read from config file 54 | -V, --verbose output detail info 55 | -l, --log output detail info to log file, which if not indicated "flynet.log" will 56 | be default 57 | -H, --help show detail usage 58 | 59 | Mail bug reports and suggestions to 60 | or github: https://github.com/asche910/flynet`) 61 | } 62 | 63 | func parseArgs(args []string) { 64 | if len(args) < 1 { 65 | return 66 | } 67 | switch args[0] { 68 | case "--mode", "-M": 69 | if len(args) > 1 { 70 | switch args[1] { 71 | case ModeMap[1]: 72 | flyServer.Mode = 1 73 | case ModeMap[2], "socks": 74 | flyServer.Mode = 2 75 | case ModeMap[3], "socks-tcp": 76 | flyServer.Mode = 3 77 | case ModeMap[4], "socks-udp": 78 | flyServer.Mode = 4 79 | case ModeMap[5]: 80 | flyServer.Mode = 5 81 | default: 82 | fmt.Println("flynet: no correct mode found!") 83 | printHelp() 84 | os.Exit(1) 85 | } 86 | parseArgs(args[2:]) 87 | } else { 88 | fmt.Println("flynet: no detail mode found!") 89 | printHelp() 90 | os.Exit(1) 91 | } 92 | case "--listen", "-L": 93 | if hasNAttributes(args, 1) { 94 | fly.CheckPort(args[1]) 95 | if hasNAttributes(args, 2) { 96 | fly.CheckPort(args[2]) 97 | flyServer.Ports = []string{args[1], args[2]} 98 | parseArgs(args[3:]) 99 | } else { 100 | flyServer.Ports = []string{args[1]} 101 | parseArgs(args[2:]) 102 | } 103 | } else { 104 | fmt.Println("flynet: no port found!") 105 | printHelp() 106 | os.Exit(1) 107 | } 108 | case "-m", "--method": 109 | if hasNAttributes(args, 1) { 110 | flyServer.Method = args[1] 111 | parseArgs(args[2:]) 112 | } else { 113 | fmt.Println("fly: no password found!") 114 | printHelp() 115 | os.Exit(1) 116 | } 117 | case "--password", "-P": 118 | if hasNAttributes(args, 1) { 119 | flyServer.Password = args[1] 120 | parseArgs(args[2:]) 121 | } else { 122 | fmt.Println("flynet: no password found!") 123 | printHelp() 124 | os.Exit(1) 125 | } 126 | case "--config", "-C": 127 | if hasNAttributes(args, 1) { 128 | readConfig(args[1]) 129 | } else { 130 | fmt.Println("flynet: no config file found!") 131 | printHelp() 132 | os.Exit(1) 133 | } 134 | case "--verbose", "-V": 135 | fly.EnableDebug(true) 136 | parseArgs(args[1:]) 137 | case "--logs", "-l": 138 | if hasNAttributes(args, 1) { 139 | fly.SetLogName(args[1]) 140 | } 141 | fly.EnableLog(true) 142 | parseArgs(args[1:]) 143 | case "--help", "-H": 144 | printHelp() 145 | parseArgs(args[1:]) 146 | os.Exit(0) 147 | default: 148 | fmt.Println("flynet: please input correct command!") 149 | printHelp() 150 | os.Exit(1) 151 | } 152 | } 153 | 154 | // judge if the current args option has n attributes at least. 155 | // for example: 156 | // args = []string{"--listen", "1080", "8888"} 157 | // hasNAttributes(args, 2) will return true 158 | func hasNAttributes(args []string, n int) bool { 159 | if len(args) > n { 160 | for i := 1; i <= n; i++ { 161 | if strings.HasPrefix(args[i], "-") { 162 | return false 163 | } 164 | } 165 | return true 166 | } 167 | return false 168 | } 169 | 170 | func checkArgs() { 171 | if flyServer.Mode == 0 { 172 | fmt.Println("Please choose a mode!") 173 | printHelp() 174 | os.Exit(1) 175 | } else if flyServer.Mode == 5 { 176 | if len(flyServer.Ports) != 2 { 177 | fmt.Println("flynet: please input two port!") 178 | printHelp() 179 | os.Exit(1) 180 | } 181 | } else { 182 | if len(flyServer.Ports) != 1 { 183 | fmt.Println("flynet: please choose a port to listen!") 184 | printHelp() 185 | os.Exit(1) 186 | } 187 | } 188 | } 189 | 190 | // load config file 191 | func readConfig(path string) { 192 | conf, err := ini.Load(path) 193 | if err != nil { 194 | fmt.Println("load config file fail --->", err) 195 | fmt.Println("you could refer to the example config file: https://github.com/asche910/flynet") 196 | os.Exit(1) 197 | } 198 | section, err := conf.NewSection("server") 199 | if err != nil { 200 | fmt.Println("read client tag failed --->", err) 201 | } 202 | mode := getAttr(section, "mode") 203 | portStr := getAttr(section, "port") 204 | method := getAttr(section, "method") 205 | password := getAttr(section, "password") 206 | verbose := getAttr(section, "verbose") 207 | logs := getAttr(section, "log") 208 | 209 | switch mode { 210 | case ModeMap[1]: 211 | flyServer.Mode = 1 212 | case ModeMap[2], "socks": 213 | flyServer.Mode = 2 214 | case ModeMap[3], "socks-tcp": 215 | flyServer.Mode = 3 216 | case ModeMap[4], "socks-udp": 217 | flyServer.Mode = 4 218 | case ModeMap[5]: 219 | flyServer.Mode = 5 220 | default: 221 | fmt.Println("flynet: no correct mode found!") 222 | printHelp() 223 | os.Exit(1) 224 | } 225 | 226 | // in case of forward mode, which needs two port 227 | ports := strings.Fields(portStr) 228 | if len(ports) == 2 { 229 | fly.CheckPort(ports[0]) 230 | fly.CheckPort(ports[1]) 231 | flyServer.Ports = []string{ports[0], ports[1]} 232 | }else if len(ports) == 1 { 233 | fly.CheckPort(ports[0]) 234 | flyServer.Ports = []string{ports[0]} 235 | } 236 | flyServer.Method = method 237 | flyServer.Password = password 238 | 239 | if verbose == "true" { 240 | fly.EnableDebug(true) 241 | } 242 | 243 | if logs != "" { 244 | fly.SetLogName(logs) 245 | fly.EnableLog(true) 246 | } 247 | } 248 | 249 | // read attr from config file 250 | func getAttr(section *ini.Section, name string) string { 251 | key, e := section.GetKey(name) 252 | if e != nil { 253 | return "" 254 | } 255 | return key.String() 256 | } 257 | 258 | func initLog() { 259 | fly.InitLog() 260 | } 261 | -------------------------------------------------------------------------------- /fly/buf_pipe.go: -------------------------------------------------------------------------------- 1 | package fly 2 | 3 | import "sync" 4 | 5 | type BufferedPipe struct { 6 | mu sync.Mutex 7 | cond *sync.Cond 8 | buf []byte 9 | start int 10 | size int 11 | } 12 | 13 | func NewBufferedPipe(size int) *BufferedPipe { 14 | p := &BufferedPipe{ 15 | buf: make([]byte, size), 16 | start: 0, 17 | size: 0, 18 | } 19 | p.cond = sync.NewCond(&p.mu) 20 | return p 21 | } 22 | 23 | func (p *BufferedPipe) Write(b []byte) (int, error) { 24 | p.mu.Lock() 25 | defer p.mu.Unlock() 26 | for p.start+p.size+len(b) > cap(p.buf) { 27 | logger.Printf("Write pipe wait --- > start:%d, size:%d, len(b):%d, cap(buf):%d \n", p.start, p.size, len(b), cap(p.buf)) 28 | p.cond.Wait() 29 | } 30 | //p.buf = append(p.buf, b...) 31 | copy(p.buf[p.start+p.size:p.start+p.size+len(b)], b) 32 | p.size += len(b) 33 | p.cond.Broadcast() 34 | return len(b), nil 35 | } 36 | 37 | func (p *BufferedPipe) Read(b []byte) (readSize int, err error) { 38 | p.mu.Lock() 39 | defer p.mu.Unlock() 40 | for p.size == 0 { 41 | p.cond.Wait() 42 | } 43 | if len(b) >= p.size { 44 | copy(b[0:p.size], p.buf[p.start:p.start+p.size]) 45 | readSize = p.size 46 | p.start = 0 47 | p.size = 0 48 | } else { 49 | copy(b, p.buf[p.start:p.start+len(b)]) 50 | readSize = len(b) 51 | p.start += readSize 52 | p.size -= readSize 53 | if p.start+p.size > cap(p.buf)/2 { 54 | newBuf := make([]byte, cap(p.buf)) 55 | copy(newBuf[0:p.size], p.buf[p.start:p.start+p.size]) 56 | p.buf = newBuf 57 | p.start = 0 58 | } 59 | } 60 | 61 | //n := copy(b, p.buf) 62 | //p.buf = p.buf[n:] 63 | p.cond.Broadcast() 64 | //return n, nil 65 | return 66 | } 67 | 68 | func (p *BufferedPipe) Size() int { 69 | return p.size 70 | } 71 | -------------------------------------------------------------------------------- /fly/cipher.go: -------------------------------------------------------------------------------- 1 | package fly 2 | 3 | import ( 4 | "crypto/aes" 5 | "crypto/cipher" 6 | "crypto/md5" 7 | "crypto/rc4" 8 | "fmt" 9 | 10 | "github.com/aead/chacha20" 11 | ) 12 | 13 | var key = "asche910-flynet-" 14 | 15 | type EncOrDec int 16 | 17 | const ( 18 | ENC EncOrDec = iota 19 | DEC 20 | ) 21 | 22 | var ( 23 | IV = []byte{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f} 24 | ) 25 | 26 | var CipherMap = map[string]*cipherEntity{ 27 | "aes-128-cfb": {16, 16, newAESCFBStream}, 28 | "aes-192-cfb": {24, 16, newAESCFBStream}, 29 | "aes-256-cfb": {32, 16, newAESCFBStream}, 30 | "aes-128-ctr": {16, 16, newAESCTRStream}, 31 | "aes-192-ctr": {24, 16, newAESCTRStream}, 32 | "aes-256-ctr": {32, 16, newAESCTRStream}, 33 | "rc4-md5": {16, 16, newRC4MD5Stream}, 34 | "rc4-md5-6": {16, 6, newRC4MD5Stream}, 35 | "chacha20": {32, 8, newChaCha20Stream}, 36 | "chacha20-ietf": {32, 12, newChaCha20Stream}, 37 | } 38 | 39 | // generate a fixed length key 40 | func genKey(rawKey string, len int) []byte { 41 | key := make([]byte, 256) 42 | cur := 0 43 | for cur < len { 44 | sum := md5.Sum([]byte(fmt.Sprintf("%s%d", rawKey, cur))) 45 | copy(key[cur:cur+16], sum[:]) 46 | cur += 16 47 | } 48 | return key[:len] 49 | } 50 | 51 | type Cipher struct { 52 | encoder cipher.Stream 53 | decoder cipher.Stream 54 | key []byte 55 | method string 56 | } 57 | 58 | func (cipher *Cipher) Encrypt(dst, src []byte) { 59 | cipher.encoder.XORKeyStream(dst, src) 60 | } 61 | 62 | func (cipher *Cipher) EncryptAndGet(src []byte) (dst []byte) { 63 | dst = make([]byte, len(src)) 64 | cipher.encoder.XORKeyStream(dst, src) 65 | return 66 | } 67 | 68 | func (cipher *Cipher) Decrypt(dst, src []byte) { 69 | cipher.decoder.XORKeyStream(dst, src) 70 | } 71 | 72 | func (cipher *Cipher) DecryptAndGet(src []byte) (dst []byte) { 73 | dst = make([]byte, len(src)) 74 | cipher.decoder.XORKeyStream(dst, src) 75 | return 76 | } 77 | 78 | // a detail encrypt or decrypt method 79 | type cipherEntity struct { 80 | keyLen int 81 | ivLen int 82 | newStream func(key, iv []byte, eod EncOrDec) cipher.Stream 83 | } 84 | 85 | func NewCipherInstance(secretKey, method string) *Cipher { 86 | if secretKey == "" { 87 | secretKey = key 88 | } 89 | entity := CipherMap[method] 90 | if entity == nil { 91 | entity = CipherMap["aes-256-cfb"] 92 | } 93 | 94 | key := genKey(secretKey, entity.keyLen) 95 | newIV := IV[:entity.ivLen] 96 | enc := entity.newStream(key, newIV, ENC) 97 | dec := entity.newStream(key, newIV, DEC) 98 | return &Cipher{encoder: enc, decoder: dec} 99 | } 100 | 101 | func newAESCFBStream(key, iv []byte, eod EncOrDec) cipher.Stream { 102 | block, err := aes.NewCipher(key) 103 | if err != nil { 104 | logger.Println("aes.NewCipher failed --->", err) 105 | return nil 106 | } 107 | if eod == ENC { 108 | enc := cipher.NewCFBEncrypter(block, IV) 109 | return enc 110 | } else { 111 | dec := cipher.NewCFBDecrypter(block, IV) 112 | return dec 113 | } 114 | } 115 | 116 | func newAESCTRStream(key, iv []byte, eod EncOrDec) cipher.Stream { 117 | block, err := aes.NewCipher(key) 118 | if err != nil { 119 | logger.Println("aes.NewCipher failed --->", err) 120 | return nil 121 | } 122 | return cipher.NewCTR(block, iv) 123 | } 124 | 125 | func newChaCha20Stream(key, iv []byte, eod EncOrDec) cipher.Stream { 126 | stream, err := chacha20.NewCipher(iv, key) 127 | if err != nil { 128 | logger.Println("chacha20.NewCipher failed --->", err) 129 | return nil 130 | } 131 | return stream 132 | } 133 | 134 | func newRC4MD5Stream(key, iv []byte, eod EncOrDec) cipher.Stream { 135 | hs := md5.New() 136 | hs.Write(key) 137 | hs.Write(iv) 138 | rc4key := hs.Sum(nil) 139 | stream, err := rc4.NewCipher(rc4key) 140 | if err != nil { 141 | logger.Println("rc4.NewCipher failed --->", err) 142 | return nil 143 | } 144 | return stream 145 | } 146 | -------------------------------------------------------------------------------- /fly/cipher_test.go: -------------------------------------------------------------------------------- 1 | package fly 2 | 3 | import ( 4 | "fmt" 5 | "testing" 6 | ) 7 | 8 | const text = "hello,world!----++++++" 9 | const text2 = "hello,world!worldworlds sdf sfj sa sfjslabb\n sfbzcvbxqeuqyuiyajhlfjdbz,v sf" 10 | 11 | func testCipher(t *testing.T, method string) { 12 | cipherInstance := NewCipherInstance(key, method) 13 | testSingleMethod(cipherInstance, text) 14 | testSingleMethod(cipherInstance, text2) 15 | testSingleMethod(cipherInstance, "safhj; sfafajksfb") 16 | testSingleMethod(cipherInstance, "\ttextLen := len(text)\n\ttextLen := len(text)\n\ttext"+ 17 | "Len := len(text)\n\ttextLen :\ttextLen := len(text)\n\ttext"+ 18 | "Len := len(text)\n\ttextLen := len(text)\n\ttextLen := len(text)\n\ttextLen"+ 19 | "Len := len(text)\n\ttextLen := len(text)\n\ttextLen := len(text)\n\ttextLen"+ 20 | "Len := len(text)\n\ttextLen := len(text)\n\ttextLen := len(text)\n\ttextLen"+ 21 | " := len(text)\n= len(text)\n\ttextLen := len(tex\ttextLen := len(text)\n"+ 22 | "t)\n\ttextLen := len(text)\n") 23 | 24 | testSingleMethod(cipherInstance, "safhj; sfsf sfafajksfb") 25 | 26 | } 27 | 28 | func testSingleMethod(cipher *Cipher, raw string) bool { 29 | textLen := len(raw) 30 | decryptBuff := make([]byte, textLen) 31 | encryptBuff := make([]byte, textLen) 32 | cipher.Encrypt(encryptBuff, []byte(raw)) 33 | cipher.Decrypt(decryptBuff, encryptBuff) 34 | if string(decryptBuff) != raw { 35 | fmt.Println("NOT PASS!!! ", string(decryptBuff)) 36 | return false 37 | } else { 38 | fmt.Println("PASS") 39 | return true 40 | } 41 | } 42 | 43 | func TestCipher(t *testing.T) { 44 | key := "123456" 45 | keyLen := len(key) 46 | buff := make([]byte, 1024) 47 | cipherInstance := NewCipherInstance(key, "aes-128-cfb") 48 | cipherInstance.encoder.XORKeyStream(buff, []byte(key)) 49 | fmt.Println("before", string(buff[:keyLen])) 50 | cipherInstance.decoder.XORKeyStream(buff, buff[:keyLen]) 51 | fmt.Println("after", string(buff[:keyLen])) 52 | } 53 | 54 | func TestAESCTR(t *testing.T) { 55 | testCipher(t, "aes-128-ctr") 56 | } 57 | 58 | func TestChacha20(t *testing.T) { 59 | testCipher(t, "chacha20") 60 | //testCipher(t, "chacha20-ietf") 61 | } 62 | 63 | func TestRC4MD5(t *testing.T) { 64 | testCipher(t, "rc4-md5") 65 | //testCipher(t, "rc4-md5-6") 66 | } 67 | 68 | func Test(t *testing.T) { 69 | by := []byte{'h', 'e', 'l', 'l', 'o'} 70 | newBy := by[2:4] 71 | fmt.Println(len(by), cap(by)) 72 | fmt.Println(len(newBy), cap(newBy)) 73 | 74 | b := make([]byte, 0, 10) 75 | fmt.Println(b) 76 | fmt.Println(len(b), cap(b)) 77 | //b[7] = 7 78 | copy(b[3:3+len(by)], by) 79 | fmt.Println(b[0:10]) 80 | fmt.Println(len(b), cap(b)) 81 | 82 | } 83 | -------------------------------------------------------------------------------- /fly/conn.go: -------------------------------------------------------------------------------- 1 | package fly 2 | 3 | import ( 4 | "encoding/binary" 5 | "net" 6 | ) 7 | 8 | // DataOffset refer to encrypted Data Package 9 | const DataOffset = 4 10 | 11 | type Conn struct { 12 | Conn net.Conn 13 | Cipher *Cipher 14 | BufPipe *BufferedPipe 15 | //PipeReader *io.PipeReader 16 | //PipeWriter *io.PipeWriter 17 | } 18 | 19 | func NewConn(con net.Conn, cipher *Cipher) *Conn { 20 | //pr, pw := io.Pipe() 21 | return &Conn{ 22 | Conn: con, 23 | Cipher: cipher, 24 | //BufPipe: NewBufferedPipe(4096), 25 | BufPipe: NewBufferedPipe(8192), 26 | //PipeReader: pr, 27 | //PipeWriter: pw, 28 | } 29 | } 30 | 31 | // DialWithAddr pipeW dial server and send request addr of client 32 | func DialWithAddr(server, method, key string, addr []byte) *Conn { 33 | conn, err := net.Dial("tcp", server) 34 | if err != nil { 35 | logger.Println("Dial server failed --->", err) 36 | return nil 37 | } 38 | newConn := NewConn(conn, NewCipherInstance(key, method)) 39 | 40 | // 2 byte of len + request data 41 | //body := make([]byte, len(addr)+2) 42 | //binary.BigEndian.PutUint16(body[:2], uint16(len(addr))) 43 | //copy(body[2:], addr) 44 | //fmt.Println("body ", body) 45 | 46 | if _, err := newConn.Write(addr); err != nil { 47 | logger.Println("Write addr to server failed --->", err) 48 | return nil 49 | } 50 | return newConn 51 | } 52 | 53 | // Request package 54 | // +----+-----+----------+ 55 | // | MG | LEN | DATA | 56 | // +----+-----+----------+ 57 | // | 2 | 2 | Variable | 58 | // +----+-----+----------+ 59 | // MG: Magic num, 2byte, 0x255,0x255 60 | // LEN: length of DATA 61 | func (conn *Conn) Write(b []byte) (n int, err error) { 62 | dataSize := len(b) 63 | var buff []byte 64 | buff = make([]byte, dataSize+DataOffset) 65 | // Magic Number 66 | buff[0] = 255 67 | buff[1] = 255 68 | 69 | binary.BigEndian.PutUint16(buff[2:4], uint16(dataSize)) 70 | 71 | //logger.Println("Before encrypt: ", b[:]) 72 | //logger.Println("before", b) 73 | conn.Cipher.Encrypt(buff[DataOffset:], b) 74 | //logger.Println("after", buff) 75 | //logger.Println("After encrypt: ", len(buff)) 76 | //n, err = conn.Conn.Write(b) 77 | //logger.Println("Conn write") 78 | n, err = conn.Conn.Write(buff) 79 | //logger.Println("Conn write len", n) 80 | 81 | if err != nil { 82 | logger.Println("Encrypt data write failed", err) 83 | } 84 | if n != len(buff) { 85 | logger.Println("Encrypt data short write ", n, len(buff)) 86 | } 87 | return n, err 88 | } 89 | 90 | func (conn *Conn) Read(b []byte) (n int, err error) { 91 | return conn.Conn.Read(b) 92 | //buff := make([]byte, 1024) 93 | //logger.Println("Conn read") 94 | //n, err = conn.Conn.Read(buff) 95 | //if err != nil { 96 | // logger.Println("Conn read failed", err) 97 | //} 98 | ////logger.Println("before", buff[:n]) 99 | //if n > 0 { 100 | // logger.Println("Conn read len", n) 101 | // b = b[:n] 102 | // conn.Decrypt(b, buff[:n]) 103 | // //logger.Println("after", b[:n]) 104 | //} 105 | //return n, err 106 | } 107 | 108 | func (conn *Conn) Close() error { 109 | err := conn.Conn.Close() 110 | return err 111 | } 112 | -------------------------------------------------------------------------------- /fly/error_utils.go: -------------------------------------------------------------------------------- 1 | package fly 2 | 3 | import ( 4 | "fmt" 5 | ) 6 | 7 | // just check error and print if err is not nil 8 | func CheckError(err error, info string) { 9 | if err != nil { 10 | logger.Println(info, err) 11 | } 12 | } 13 | 14 | // check error and exit if err is not nil 15 | func CheckErrorOrExit(err error, info string) { 16 | if err != nil { 17 | logger.Panicln(info, err) 18 | } 19 | } 20 | 21 | // get info about port occupied 22 | func PortOccupiedInfo(port string) string { 23 | return fmt.Sprintf("port %s has been occuried!", port) 24 | } 25 | 26 | func AcceptErrorInfo() string { 27 | return "accept client error!" 28 | } 29 | -------------------------------------------------------------------------------- /fly/http.go: -------------------------------------------------------------------------------- 1 | package fly 2 | 3 | import ( 4 | "bytes" 5 | "fmt" 6 | "io" 7 | "net" 8 | "net/url" 9 | "strings" 10 | ) 11 | 12 | // start http proxy at port 13 | func StartHttp(port string) { 14 | ln := ListenTCP(port) 15 | for { 16 | client, err := ln.Accept() 17 | if err != nil { 18 | CheckError(err, AcceptErrorInfo()) 19 | continue 20 | } 21 | logger.Println("accept success!") 22 | go handleHttpClient(client) 23 | } 24 | } 25 | 26 | func handleHttpClient(client net.Conn) { 27 | if client == nil { 28 | return 29 | } 30 | defer client.Close() 31 | 32 | var b [1024]byte 33 | n, err := client.Read(b[:]) 34 | if err != nil { 35 | logger.Println(err) 36 | return 37 | } 38 | index := bytes.IndexByte(b[:], '\n') 39 | 40 | if index == -1 { 41 | index = len(b) - 1 42 | logger.Println("parse request error --->", string(b[:])) 43 | } 44 | var method, host, address string 45 | _, _ = fmt.Sscanf(string(b[:]), "%s%s", &method, &host) 46 | hostPortURL, err := url.Parse(host) 47 | if err != nil { 48 | logger.Println(err) 49 | return 50 | } 51 | 52 | if hostPortURL.Opaque == "443" { //https request 53 | address = hostPortURL.Scheme + ":443" 54 | } else { //http request 55 | if strings.Index(hostPortURL.Host, ":") == -1 { // host not end with a port， add the default port 80 56 | address = hostPortURL.Host + ":80" 57 | } else { 58 | address = hostPortURL.Host 59 | } 60 | } 61 | 62 | // having already get host and port, let's dial to the target server 63 | server, err := net.Dial("tcp", address) 64 | if err != nil { 65 | logger.Println(err) 66 | return 67 | } 68 | if method == "CONNECT" { 69 | _, _ = fmt.Fprint(client, "HTTP/1.1 200 Connection established\r\n\r\n") 70 | } else { 71 | _, _ = server.Write(b[:n]) 72 | } 73 | // forward the traffic 74 | go io.Copy(server, client) 75 | io.Copy(client, server) 76 | } 77 | -------------------------------------------------------------------------------- /fly/logs.go: -------------------------------------------------------------------------------- 1 | package fly 2 | 3 | import ( 4 | nested "github.com/antonfisher/nested-logrus-formatter" 5 | log "github.com/sirupsen/logrus" 6 | "io" 7 | //"log" 8 | "os" 9 | ) 10 | 11 | var ( 12 | logFlag = false 13 | debugFlag = false 14 | logger *log.Logger 15 | logName = "flynet.log" 16 | ) 17 | 18 | func InitLog() { 19 | logger = GetLogger() 20 | } 21 | 22 | func EnableLog(flag bool) { 23 | logFlag = flag 24 | } 25 | 26 | func EnableDebug(flag bool) { 27 | debugFlag = flag 28 | } 29 | 30 | // set log file name, which can include absolute path 31 | func SetLogName(name string) { 32 | logName = name 33 | } 34 | 35 | // return a logger 36 | func GetLogger() *log.Logger { 37 | if logger != nil { 38 | return logger 39 | } 40 | var f *os.File 41 | var err error 42 | if logFlag { 43 | f, err = os.OpenFile(logName, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0644) 44 | if err != nil { 45 | log.Println("create or open log file failed --->", err) 46 | } 47 | } 48 | var writers []io.Writer 49 | 50 | //if logFlag && debugFlag { 51 | // writers = []io.Writer{f, os.Stdout} 52 | //} else if !logFlag && !debugFlag { 53 | // writers = []io.Writer{} 54 | //} else if debugFlag { 55 | // writers = []io.Writer{os.Stdout} 56 | //} else { 57 | // writers = []io.Writer{f} 58 | //} 59 | 60 | if logFlag { 61 | writers = append(writers, f) 62 | } 63 | if debugFlag { 64 | writers = append(writers, os.Stdout) 65 | } 66 | targetWriter := io.MultiWriter(writers...) 67 | 68 | logs := log.New() 69 | logs.Out = targetWriter 70 | //logs := log.New(targetWriter, "", log.Ldate|log.Ltime) 71 | 72 | //logs.SetLevel(log.InfoLevel) 73 | logs.SetLevel(log.DebugLevel) 74 | logs.SetFormatter(&nested.Formatter{ 75 | HideKeys: true, 76 | FieldsOrder: []string{"component", "category"}, 77 | TimestampFormat: "2006-01-02 15:04:05", 78 | }) 79 | 80 | //logs.SetReportCaller(true) 81 | return logs 82 | } 83 | -------------------------------------------------------------------------------- /fly/net_utils.go: -------------------------------------------------------------------------------- 1 | package fly 2 | 3 | import ( 4 | "fmt" 5 | "net" 6 | "strconv" 7 | ) 8 | 9 | // ListenTCP listen tcp port at the localPort 10 | func ListenTCP(localPort string) net.Listener { 11 | listener, err := net.Listen("tcp", fmt.Sprintf(":%s", localPort)) 12 | if err != nil { 13 | logger.Panicln(PortOccupiedInfo(localPort), err.Error()) 14 | } 15 | logger.Printf("listen tcp on: %s\n", localPort) 16 | return listener 17 | } 18 | 19 | // ListenUDP listen udp port at the localPort 20 | func ListenUDP(localPort string) net.Listener { 21 | listener, err := net.Listen("udp", fmt.Sprintf(":%s", localPort)) 22 | if err != nil { 23 | logger.Panicln(PortOccupiedInfo(localPort), err.Error()) 24 | } 25 | logger.Printf("listen udp on: %s\n", localPort) 26 | return listener 27 | } 28 | 29 | func CheckPort(port string) { 30 | portNum, err := strconv.Atoi(port) 31 | if err != nil { 32 | logger.Fatalln("port is not a number --->", err) 33 | } 34 | if portNum < 1 || portNum > 65535 { 35 | logger.Fatalln("port should be in range [1,65536)") 36 | } 37 | } 38 | -------------------------------------------------------------------------------- /fly/pac.go: -------------------------------------------------------------------------------- 1 | package fly 2 | 3 | import ( 4 | "io" 5 | "net/http" 6 | "os" 7 | ) 8 | 9 | // return the stream and size of pac file 10 | func GetPAC() ([]byte, int) { 11 | // run from the same dir with flynet.pac 12 | file, err := os.Open(`flynet.pac`) 13 | if err != nil { 14 | // run from cmd/client/client.go 15 | file, err = os.Open("../../flynet.pac") 16 | if err != nil { 17 | // run from fly/pac_test.go 18 | file, err = os.Open("../flynet.pac") 19 | if err != nil { 20 | logger.Println("pac file not found! start downlaod from github...") 21 | err := downloadPAC() 22 | logger.Println("pac file download completed!") 23 | if err != nil { 24 | return nil, 0 25 | } 26 | return GetPAC() 27 | } 28 | } 29 | } 30 | 31 | index := 0 32 | fileBuff := make([]byte, 200*1024) 33 | for { 34 | logger.Println("start reading...") 35 | n, err := file.Read(fileBuff[index:]) 36 | if err != nil { 37 | if err == io.EOF { 38 | logger.Println("read pac file ok.") 39 | break 40 | } 41 | logger.Println("read pac file error --->", err) 42 | } 43 | index += n 44 | } 45 | return fileBuff, index 46 | } 47 | 48 | func downloadPAC() error { 49 | fileName := "flynet.pac" 50 | resp, err := http.Get("https://raw.githubusercontent.com/petronny/gfwlist2pac/master/gfwlist.pac") 51 | if err != nil { 52 | logger.Println("download pac file failed --->", err) 53 | logger.Panicln("please check your network or disable pac mode!") 54 | return err 55 | } 56 | defer resp.Body.Close() 57 | 58 | file, err := os.Create(fileName) 59 | if err != nil { 60 | logger.Println("create pac file failed --->", err) 61 | return err 62 | } 63 | io.Copy(file, resp.Body) 64 | return nil 65 | } 66 | -------------------------------------------------------------------------------- /fly/pac_test.go: -------------------------------------------------------------------------------- 1 | package fly 2 | 3 | import "testing" 4 | 5 | func TestStartPAC(t *testing.T) { 6 | GetPAC() 7 | } 8 | -------------------------------------------------------------------------------- /fly/portforward.go: -------------------------------------------------------------------------------- 1 | package fly 2 | 3 | import ( 4 | "io" 5 | "net" 6 | "sync" 7 | ) 8 | 9 | // forward your local port to server port -- client 10 | func PortForwardForClient(localPort, serverAddr string) { 11 | for { 12 | var localCon, serverCon net.Conn 13 | var err error 14 | for { 15 | localCon, err = net.Dial("tcp", ":"+localPort) 16 | if err != nil { 17 | logger.Println(err, "Dial to the target failed!") 18 | } else { 19 | logger.Printf("Dial to localhost:%s success!\n", localPort) 20 | break 21 | } 22 | } 23 | 24 | for { 25 | serverCon, err = net.Dial("tcp", serverAddr) 26 | if err != nil { 27 | logger.Println(err, "Dial to the target failed!") 28 | } else { 29 | logger.Printf("Dial to %s success!\n", serverAddr) 30 | break 31 | } 32 | } 33 | logger.Println("Connect success, start forwarding...") 34 | forward( serverCon, localCon) 35 | } 36 | } 37 | 38 | // forward your local port to server port -- server 39 | func PortForwardForServer(laborPort, queryPort string) { 40 | laborLn := ListenTCP(laborPort) 41 | queryLn := ListenTCP(queryPort) 42 | for { 43 | laborConn, e1 := laborLn.Accept() 44 | queryConn, e2 := queryLn.Accept() 45 | if e1 != nil || e2 != nil { 46 | CheckError(e1, "") 47 | CheckError(e2, "") 48 | continue 49 | } 50 | logger.Println("Connect success, start forwarding...") 51 | forward(laborConn, queryConn) 52 | } 53 | } 54 | 55 | func forward(con1, con2 net.Conn) { 56 | var wg sync.WaitGroup 57 | wg.Add(2) 58 | go copyConn(con1,con2, &wg) 59 | go copyConn(con2,con1, &wg) 60 | wg.Wait() 61 | } 62 | 63 | func copyConn(con1, con2 net.Conn, wg *sync.WaitGroup) { 64 | io.Copy(con1, con2) 65 | con1.Close() 66 | wg.Done() 67 | } -------------------------------------------------------------------------------- /fly/relay.go: -------------------------------------------------------------------------------- 1 | package fly 2 | 3 | import ( 4 | "encoding/binary" 5 | "github.com/xtaci/kcp-go" 6 | "io" 7 | "net" 8 | ) 9 | 10 | func TCPToUDP(session *kcp.UDPSession, conn net.Conn) { 11 | buff := make([]byte, 4096) 12 | for { 13 | n, err := conn.Read(buff) 14 | if err != nil { 15 | logger.Println(err) 16 | break 17 | } 18 | //logs.Printf("TCPToUDP read %d byte\n", n) 19 | n, err = session.Write(buff[:n]) 20 | if err != nil { 21 | logger.Println(err) 22 | break 23 | } 24 | } 25 | } 26 | 27 | func UDPToTCP(conn net.Conn, session *kcp.UDPSession) { 28 | buff := make([]byte, 4096) 29 | for { 30 | n, err := session.Read(buff) 31 | if err != nil { 32 | logger.Println(err) 33 | break 34 | } 35 | //logs.Printf("UDPToTCP read %d byte\n", n) 36 | n, err = conn.Write(buff[:n]) 37 | if err != nil { 38 | logger.Println(err) 39 | break 40 | } 41 | } 42 | } 43 | 44 | func RelayTraffic(dst, src net.Conn) { 45 | buff := make([]byte, 1024) 46 | for { 47 | n, err := src.Read(buff) 48 | if n > 0 { 49 | m, err := dst.Write(buff[:n]) 50 | if err != nil { 51 | logger.Println("RelayTraffic write failed:", err) 52 | break 53 | } 54 | if m != n { 55 | logger.Println("RelayTraffic short write:", err) 56 | break 57 | } 58 | } 59 | if err != nil { 60 | if err != io.EOF { 61 | logger.Println("RelayTraffic read failed:", err) 62 | } 63 | break 64 | } 65 | } 66 | } 67 | 68 | func RelayTrafficWithFlag(dst *Conn, src net.Conn, flag string) { 69 | buff := make([]byte, 1024) 70 | //conn, needDecrypt := src.(*Conn) 71 | //conn, needEncrypt := dst.(*Conn) 72 | // 73 | //var buffR *io.PipeReader 74 | //var buffW *io.PipeWriter 75 | //if needDecrypt { 76 | // buffR, buffW = io.Pipe() 77 | //} 78 | 79 | for { 80 | logger.Debugln(flag, "start read...") 81 | n, err := src.Read(buff) 82 | if err != nil { 83 | if err != io.EOF { 84 | logger.Errorln(flag, "relayTraffic read failed:", err) 85 | } else { 86 | logger.Debugln(flag, "read EOF", n, err) 87 | } 88 | _ = dst.Close() 89 | break 90 | } 91 | if n > 0 { 92 | logger.Debugf("%s write: \n-------------- \n%s \n-------------- \n ", flag, string(buff[:n])) 93 | m, err := dst.Write(buff[:n]) // m = n + 4 94 | if err != nil { 95 | logger.Errorln(flag, "relayTraffic write failed", err) 96 | break 97 | } 98 | if m != n+DataOffset { // addition header size 99 | logger.Errorln(flag, "relayTraffic short write:", err) 100 | break 101 | } 102 | logger.Debugln(flag, "write", m) 103 | } 104 | 105 | //logger.Println(flag, "write one") 106 | } 107 | logger.Debugln(flag, "write done") 108 | } 109 | 110 | func RelayTrafficAndDecrypt(dst net.Conn, conn *Conn, flag string) { 111 | //pipeR, pipeW := io.Pipe() 112 | buff := make([]byte, 1024) 113 | 114 | // read pipeline 115 | go func() { 116 | headerBuff := make([]byte, DataOffset) 117 | var buffSize int 118 | var encryptBuff []byte 119 | var decryptBuff []byte 120 | 121 | for { 122 | logger.Debugln(flag, "start read header...") 123 | n, err := io.ReadFull(conn.BufPipe, headerBuff) 124 | if err != nil { 125 | logger.Errorln(flag, "readFull size error ", n, err) 126 | break 127 | } 128 | //binary.BigEndian.PutUint16(headerBuff[:2], uint16(buffSize)) 129 | buffSize = int(binary.BigEndian.Uint16(headerBuff[2:DataOffset])) 130 | logger.Debugln(flag, "read header size", buffSize) 131 | logger.Debugln(flag, "current pipe size", conn.BufPipe.Size()) 132 | 133 | // Check magic number 134 | if headerBuff[0] != 255 || headerBuff[1] != 255 { 135 | logger.Errorln(flag, "header error !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ", headerBuff) 136 | // TODO other side stop 137 | break 138 | } 139 | 140 | encryptBuff = make([]byte, buffSize) 141 | n, err = io.ReadFull(conn.BufPipe, encryptBuff) 142 | if err != nil { 143 | logger.Errorln(flag, "readFull data error ", n, err) 144 | break 145 | } 146 | decryptBuff = make([]byte, buffSize) 147 | conn.Cipher.Decrypt(decryptBuff, encryptBuff) 148 | logger.Debugf("%s read decrypt body: \n-------------- \n%s \n-------------- \n", flag, string(decryptBuff)) 149 | 150 | n, err = dst.Write(decryptBuff) 151 | if err != nil { 152 | logger.Errorln(flag, "write dst error ", n, err) 153 | break 154 | } 155 | logger.Debugln(flag, "write dst", n) 156 | } 157 | }() 158 | 159 | //io.ReadFull() 160 | //flag := "M->S" 161 | for { 162 | logger.Debugln(flag, "start read...") 163 | n, err := conn.Read(buff) 164 | if n > 0 { 165 | //logger.Printf("%s write: \n-------------- \n%s \n-------------- \n ", flag, string(buff[:n])) 166 | } 167 | if err != nil { 168 | if err != io.EOF { 169 | logger.Errorln(flag, "relayTraffic read failed:", err) 170 | } else { 171 | logger.Debugln(flag, "read EOF", n, err) 172 | } 173 | _ = dst.Close() 174 | break 175 | } 176 | //go func() { 177 | logger.Debugln(flag, " start write pipe...") 178 | n, err = conn.BufPipe.Write(buff[:n]) 179 | logger.Debugln(flag, " write pipe ", n, "size ", conn.BufPipe.Size()) 180 | if err != nil { 181 | logger.Errorln(flag, "RelayTraffic write pipe failed:", err) 182 | } 183 | //}() 184 | 185 | //logger.Println(flag, "write one") 186 | } 187 | } 188 | 189 | func RelayTrafficAndEncrypt(conn *Conn, src net.Conn, flag string) { 190 | RelayTrafficWithFlag(conn, src, flag) 191 | //io.Copy(conn, src) 192 | } 193 | -------------------------------------------------------------------------------- /fly/socks5.go: -------------------------------------------------------------------------------- 1 | package fly 2 | 3 | import ( 4 | "bytes" 5 | "crypto/sha1" 6 | "encoding/binary" 7 | "fmt" 8 | "github.com/xtaci/kcp-go" 9 | "golang.org/x/crypto/pbkdf2" 10 | "io" 11 | "net" 12 | "strconv" 13 | "strings" 14 | ) 15 | 16 | // 17 | // https://datatracker.ietf.org/doc/html/rfc1928 18 | // 19 | 20 | func StartSocks5(port string) { 21 | listener := ListenTCP(port) 22 | for { 23 | client, err := listener.Accept() 24 | if err != nil { 25 | logger.Println("Accept failed!") 26 | continue 27 | } 28 | logger.Println("Client accepted!") 29 | 30 | go handleLocalClient(client) 31 | } 32 | } 33 | 34 | func handleLocalClient(client net.Conn) { 35 | data := make([]byte, 1024) 36 | n, err := client.Read(data[:]) 37 | if err != nil { 38 | logger.Println("read error!") 39 | return 40 | } 41 | 42 | if data[0] == 0x05 { 43 | // response success of the handshake to client 44 | _, err = client.Write([]byte{0x05, 0x00}) 45 | if err != nil { 46 | logger.Println("response to client failed!") 47 | return 48 | } 49 | 50 | // read request 51 | n, err = client.Read(data[:]) 52 | if err != nil { 53 | logger.Println("Read from client failed --->", err) 54 | return 55 | } else if n < 7 { 56 | logger.Println("Read error of request length --->", data[:n]) 57 | return 58 | } 59 | 60 | var host, port = parseSocksRequest(data, n) 61 | logger.Printf("Start request %s:%s\n", host, port) 62 | 63 | // reply to the request 64 | // +----+-----+-------+------+----------+----------+ 65 | // |VER | REP | RSV | ATYP | BND.ADDR | BND.PORT | 66 | // +----+-----+-------+------+----------+----------+ 67 | // | 1 | 1 | X'00' | 1 | Variable | 2 | 68 | // +----+-----+-------+------+----------+----------+ 69 | // 70 | 71 | // request to the target server 72 | server, err := net.Dial("tcp", net.JoinHostPort(host, port)) 73 | if err != nil { 74 | CheckError(err, fmt.Sprintf("request to %s:%s failed!", host, port)) 75 | 76 | by := []byte{0x05, 0x04, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} 77 | _, err = client.Write(by) 78 | return 79 | } 80 | 81 | // response request success to client 82 | by := []byte{0x05, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} 83 | _, err = client.Write(by) 84 | CheckError(err, "response 'request success' to client failed!") 85 | 86 | //var relayBuf bytes.Buffer 87 | //outPR, outPW := io.Pipe() 88 | //inPR, inPW := io.Pipe() 89 | // 90 | //go RelayTrafficWithFlag(outPW, client, "C->M") 91 | //go RelayTrafficWithFlag(server, outPR, "M->S") 92 | //go RelayTrafficWithFlag(inPW, server, "S->M") 93 | //RelayTrafficWithFlag(client, inPR, "M->C") 94 | 95 | //go RelayTrafficWithFlag(server, client, "C->S") 96 | //RelayTrafficWithFlag(client, server, "S->C") 97 | 98 | go io.Copy(server, client) 99 | io.Copy(client, server) 100 | 101 | //cipherA := NewCipherInstance("", "") 102 | //cipherB := NewCipherInstance("", "") 103 | //serverConn := NewConn(server, cipherA) 104 | //clientConn := NewConn(client, cipherB) 105 | // 106 | //go io.Copy(serverConn, clientConn) 107 | //io.Copy(clientConn, serverConn) 108 | } 109 | } 110 | 111 | func Socks5ForClientByTCP(localPort, serverAddr, method, key string, pacMode bool) { 112 | listener := ListenTCP(localPort) 113 | 114 | cipherEntity := CipherMap[method] 115 | if cipherEntity == nil { 116 | logger.Println("Encrypt method: aes-256-cfb") 117 | } else { 118 | logger.Println("Encrypt method:", method) 119 | } 120 | 121 | if pacMode { 122 | GetPAC() 123 | logger.Printf("pac mode is on, the url is: http://localhost:%s/flynet.pac\n", localPort) 124 | } 125 | 126 | for { 127 | client, err := listener.Accept() 128 | if err != nil { 129 | logger.Println("Accept failed:", err) 130 | continue 131 | } 132 | logger.Println("Client accepted!") 133 | 134 | go func() { 135 | buff := make([]byte, 1024) 136 | n, err := client.Read(buff) 137 | if err != nil { 138 | logger.Println("Read handshake request failed:", err) 139 | return 140 | } 141 | // client hello 142 | // +----+----------+----------+ 143 | // |VER | NMETHODS | METHODS | 144 | // +----+----------+----------+ 145 | // | 1 | 1 | 1 to 255 | 146 | // +----+----------+----------+ 147 | // 148 | if buff[0] == 0x05 { 149 | // accept socks5 connect 150 | if n, err = client.Write([]byte{0x05, 0x00}); err != nil { 151 | logger.Println("Write handshake response failed:", err) 152 | _ = client.Close() 153 | return 154 | } 155 | 156 | // read request 157 | if n, err = io.ReadAtLeast(client, buff, 5); err != nil { 158 | logger.Println("Read client quest failed:", err) 159 | return 160 | } 161 | // reply ok 162 | replyBy := []byte{0x05, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} 163 | if _, err = client.Write(replyBy); err != nil { 164 | logger.Println("Reply request failed:", err) 165 | _ = client.Close() 166 | return 167 | } 168 | 169 | // 170 | // +----+-----+-------+------+----------+----------+ 171 | // |VER | CMD | RSV | ATYP | DST.ADDR | DST.PORT | 172 | // +----+-----+-------+------+----------+----------+ 173 | // | 1 | 1 | X'00' | 1 | Variable | 2 | 174 | // +----+-----+-------+------+----------+----------+ 175 | // 176 | serverConn := DialWithAddr(serverAddr, method, key, buff[:n]) 177 | if serverConn == nil { 178 | _ = client.Close() 179 | return 180 | } 181 | 182 | go RelayTrafficAndEncrypt(serverConn, client, "C->M") 183 | RelayTrafficAndDecrypt(client, serverConn, "M->C") 184 | 185 | //go io.Copy(server, client) 186 | //io.Copy(client, server) 187 | } else { 188 | if pacMode { 189 | handlePACRequest(client, buff[:n], localPort) 190 | } 191 | } 192 | }() 193 | } 194 | } 195 | 196 | func Socks5ForServerByTCP(localPort, method, key string) { 197 | listener := ListenTCP(localPort) 198 | 199 | cipherEntity := CipherMap[method] 200 | if cipherEntity == nil { 201 | logger.Infoln("Encrypt method: aes-256-cfb") 202 | } else { 203 | logger.Infoln("Encrypt method:", method) 204 | } 205 | for { 206 | //logger.Println("waiting...") 207 | client, err := listener.Accept() 208 | if err != nil { 209 | logger.Errorln("Accept failed:", err) 210 | continue 211 | } 212 | go func() { 213 | buff := make([]byte, 1024) 214 | conn := NewConn(client, NewCipherInstance(key, method)) 215 | n, err := conn.Read(buff) 216 | if err != nil { 217 | logger.Errorln("Parse target address failed:", err) 218 | return 219 | } else if n < 7 { 220 | logger.Errorln("Read error of request length:", buff[:n]) 221 | return 222 | } 223 | // Check magic num 224 | if buff[0] != 255 || buff[1] != 255 { 225 | logger.Errorln("Request decrypt error", buff) 226 | return 227 | } 228 | 229 | var host, port string 230 | var reqLen int 231 | reqLen = int(binary.BigEndian.Uint16(buff[2:4])) 232 | decryptBuff := conn.Cipher.DecryptAndGet(buff[4 : 4+reqLen]) 233 | 234 | //fmt.Println(buff[:n]) 235 | logger.Debugln(decryptBuff) 236 | logger.Debugf("%d / %d \n", reqLen, n) 237 | 238 | if reqLen+4 == n { 239 | host, port = parseSocksRequest(decryptBuff, n) 240 | } else if reqLen+4 < n { 241 | host, port = parseSocksRequest(decryptBuff, n) 242 | //isOver = true 243 | //buff = buff[reqLen+2:] 244 | 245 | logger.Debugln("before write pipe") 246 | n, err := conn.BufPipe.Write(buff[4+reqLen : n]) 247 | logger.Debugln("after write pipe") 248 | 249 | if err != nil { 250 | logger.Errorln("PipeWriter write", n, err) 251 | return 252 | } 253 | } 254 | 255 | logger.Infof("Request ---> %s:%s\n", host, port) 256 | 257 | // dial the target server 258 | server, err := net.Dial("tcp", net.JoinHostPort(host, port)) 259 | if err != nil { 260 | logger.Println(fmt.Sprintf("Request %s:%s failed:", host, port), err) 261 | _ = conn.Close() 262 | return 263 | } 264 | go RelayTrafficAndDecrypt(server, conn, "M->S") 265 | RelayTrafficAndEncrypt(conn, server, "S->M") 266 | 267 | //go io.Copy(server, conn) 268 | //io.Copy(conn, server) 269 | }() 270 | } 271 | } 272 | 273 | func Socks5ForClientByUDP(localPort, serverAddr string) { 274 | listener := ListenTCP(localPort) 275 | for { 276 | con, err := listener.Accept() 277 | if err != nil { 278 | logger.Println("accept error --->", err) 279 | continue 280 | } 281 | logger.Println("Client accepted.") 282 | 283 | go func() { 284 | var b [1024]byte 285 | _, err := con.Read(b[:]) 286 | if err != nil { 287 | logger.Println("read error --->", err) 288 | return 289 | } 290 | if b[0] == 0x05 { 291 | _, _ = con.Write([]byte{0x05, 0x00}) 292 | 293 | // kcp can't resolve addr such as ":8080" 294 | if strings.HasPrefix(serverAddr, ":") { 295 | serverAddr = "127.0.0.1" + serverAddr 296 | } 297 | 298 | key := pbkdf2.Key([]byte("fly"), []byte("asche910"), 1024, 32, sha1.New) 299 | block, _ := kcp.NewAESBlockCrypt(key) 300 | session, err := kcp.DialWithOptions(serverAddr, block, 10, 3) 301 | if err != nil { 302 | logger.Println("connect targetServer failed --->", err) 303 | return 304 | } 305 | go TCPToUDP(session, con) 306 | UDPToTCP(con, session) 307 | } 308 | }() 309 | } 310 | } 311 | 312 | func Socks5ForServerByUDP(localPort string) { 313 | key := pbkdf2.Key([]byte("fly"), []byte("asche910"), 1024, 32, sha1.New) 314 | block, _ := kcp.NewAESBlockCrypt(key) 315 | if listener, err := kcp.ListenWithOptions(":"+localPort, block, 10, 3); err == nil { 316 | logger.Printf("server listent udp at %s\n", localPort) 317 | for { 318 | con, err := listener.AcceptKCP() 319 | if err != nil { 320 | logger.Fatal(err) 321 | } 322 | go func() { 323 | data := make([]byte, 1024) 324 | n, err := con.Read(data) 325 | if err != nil { 326 | logger.Println("read target address failed --->", err) 327 | return 328 | } else if n < 7 { 329 | logger.Println("read error of request length --->", data[:n]) 330 | return 331 | } 332 | //logger.Println(string(data[:n])) 333 | if data[0] == 5 && data[1] == 1 && data[2] == 0 { 334 | var host, port = parseSocksRequest(data, n) 335 | 336 | // request to the target server 337 | server, err := net.Dial("tcp", net.JoinHostPort(host, port)) 338 | logger.Printf("request remote %s:%s\n", host, port) 339 | 340 | if err != nil { 341 | logger.Println("dial failed!") 342 | CheckError(err, "dial remote failed!") 343 | return 344 | } 345 | 346 | // response request success to client 347 | by := []byte{0x05, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} 348 | n, err = con.Write(by) 349 | if err != nil { 350 | logger.Println("response to client failed! ", err) 351 | return 352 | } 353 | go UDPToTCP(server, con) 354 | TCPToUDP(con, server) 355 | } else { 356 | logger.Println("unrecognized protocol!") 357 | return 358 | } 359 | }() 360 | } 361 | } else { 362 | logger.Panicln(err) 363 | } 364 | } 365 | 366 | // parse socks5 request for target host and port 367 | // 368 | // +----+-----+-------+------+----------+----------+ 369 | // |VER | CMD | RSV | ATYP | DST.ADDR | DST.PORT | 370 | // +----+-----+-------+------+----------+----------+ 371 | // | 1 | 1 | X'00' | 1 | Variable | 2 | 372 | // +----+-----+-------+------+----------+----------+ 373 | func parseSocksRequest(data []byte, n int) (string, string) { 374 | // TODO sometimes there are some nums, such as '22 3 1 2 0 1 0 1 252...' after port. why? 375 | logger.Debugln("start parse host", data) 376 | var host, port string 377 | var p1, p2 byte 378 | switch data[3] { 379 | case 0x01: // IPV4 address 380 | host = net.IPv4(data[4], data[5], data[6], data[7]).String() 381 | p1 = data[8] 382 | p2 = data[9] 383 | case 0x03: // domain 384 | host = string(data[5 : 5+data[4]]) // data[4] stands for the length of domain 385 | p1 = data[data[4]+5] 386 | p2 = data[data[4]+6] 387 | case 0x04: // IPV6 address 388 | host = net.IP{data[4], data[5], data[6], data[7], data[8], data[9], data[10], data[11], data[12], data[13], data[14], data[15], data[16], data[17], data[18], data[19]}.String() 389 | p1 = data[20] 390 | p2 = data[21] 391 | } 392 | port = strconv.Itoa(int(p1)<<8 | int(p2)) 393 | return host, port 394 | } 395 | 396 | func handlePACRequest(conn net.Conn, buff []byte, port string) { 397 | if bytes.Contains(buff[:], []byte("flynet.pac HTTP")) { 398 | fileBuff, size := GetPAC() 399 | // replace the socks5 port of pac file with the port user choose 400 | fileBuff = bytes.Replace(fileBuff[:size], []byte("SOCKS5 127.0.0.1:1080"), []byte("SOCKS5 127.0.0.1:"+port), 1) 401 | 402 | _, _ = conn.Write([]byte(fmt.Sprintf("HTTP/1.1 200 OK\r\n"+ 403 | "Content-Type: application/x-ns-proxy-autoconfig\r\n"+ 404 | "Server: flynet\r\nContent-Length: %d\r\n\r\n", size))) 405 | _, _ = conn.Write(fileBuff[:size]) 406 | } else { 407 | msg := "hello,flynet!" 408 | _, _ = conn.Write([]byte(fmt.Sprintf("HTTP/1.1 200 OK\r\n"+ 409 | "Content-Type: text/html; charset=utf-8\r\n"+ 410 | "Server: flynet\r\nContent-Length: %d\r\n\r\n%s", len(msg), msg))) 411 | } 412 | conn.Close() 413 | } 414 | -------------------------------------------------------------------------------- /flynet.conf: -------------------------------------------------------------------------------- 1 | # flynet config file 2 | # 3 | # mode support: 4 | # ['http', 'socks5', 'socks5-tcp', 'socks5-udp', 'forward'] 5 | # 6 | # method support: 7 | # ['aes-128-cfb','aes-192-cfb', 'aes-256-cfb', 'aes-128-ctr', 'aes-192-ctr', 8 | # 'aes-256-ctr', 'rc4-md5', 'rc4-md5-6', 'chacha20', 'chacha20-ietf'] 9 | # 10 | # more information at https://github.com/asche910/flynet 11 | # 12 | 13 | # if you use flynet in server side, you just care about the the attributes below [server] 14 | [server] 15 | mode = socks5-tcp # work mode 16 | port = 8888 # listen port; multi port use space to divide 17 | method = aes-256-cfb 18 | password = 19 | verbose = true 20 | log = flynet.log 21 | 22 | 23 | # if you use flynet in client side, you just care about the the attributes below [client] 24 | [client] 25 | mode = socks5-tcp # work mode 26 | port = 1080 # local socks5 listen port 27 | serverAddr = example.com:8888 # include host and port 28 | method = aes-256-cfb 29 | password = 30 | pac-mode = true # if true, flynet will start pac mode, and listen at 'http://localhost:port/flynet.pac'(the port is the socks5 port) 31 | verbose = true 32 | log = # if log name is empty, the log will not be on 33 | -------------------------------------------------------------------------------- /go.mod: -------------------------------------------------------------------------------- 1 | module github.com/asche910/flynet 2 | 3 | go 1.19 4 | 5 | require ( 6 | github.com/aead/chacha20 v0.0.0-20180709150244-8b13a72661da 7 | github.com/antonfisher/nested-logrus-formatter v1.3.1 8 | github.com/sirupsen/logrus v1.9.0 9 | github.com/xtaci/kcp-go v5.4.20+incompatible 10 | golang.org/x/crypto v0.17.0 11 | gopkg.in/ini.v1 v1.67.0 12 | ) 13 | 14 | require ( 15 | github.com/klauspost/cpuid/v2 v2.1.1 // indirect 16 | github.com/klauspost/reedsolomon v1.11.7 // indirect 17 | github.com/pkg/errors v0.9.1 // indirect 18 | github.com/stretchr/testify v1.8.2 // indirect 19 | github.com/templexxx/cpufeat v0.0.0-20180724012125-cef66df7f161 // indirect 20 | github.com/templexxx/xor v0.0.0-20191217153810-f85b25db303b // indirect 21 | github.com/tjfoc/gmsm v1.4.1 // indirect 22 | github.com/xtaci/lossyconn v0.0.0-20200209145036-adba10fffc37 // indirect 23 | golang.org/x/net v0.17.0 // indirect 24 | golang.org/x/sys v0.15.0 // indirect 25 | ) 26 | -------------------------------------------------------------------------------- /go.sum: -------------------------------------------------------------------------------- 1 | cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= 2 | github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= 3 | github.com/aead/chacha20 v0.0.0-20180709150244-8b13a72661da h1:KjTM2ks9d14ZYCvmHS9iAKVt9AyzRSqNU1qabPih5BY= 4 | github.com/aead/chacha20 v0.0.0-20180709150244-8b13a72661da/go.mod h1:eHEWzANqSiWQsof+nXEI9bUVUyV6F53Fp89EuCh2EAA= 5 | github.com/antonfisher/nested-logrus-formatter v1.3.1 h1:NFJIr+pzwv5QLHTPyKz9UMEoHck02Q9L0FP13b/xSbQ= 6 | github.com/antonfisher/nested-logrus-formatter v1.3.1/go.mod h1:6WTfyWFkBc9+zyBaKIqRrg/KwMqBbodBjgbHjDz7zjA= 7 | github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU= 8 | github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw= 9 | github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc= 10 | github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= 11 | github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= 12 | github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= 13 | github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4= 14 | github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98= 15 | github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c= 16 | github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q= 17 | github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A= 18 | github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U= 19 | github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U= 20 | github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw= 21 | github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8= 22 | github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA= 23 | github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs= 24 | github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w= 25 | github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0= 26 | github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI= 27 | github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M= 28 | github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU= 29 | github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU= 30 | github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE= 31 | github.com/klauspost/cpuid/v2 v2.1.1 h1:t0wUqjowdm8ezddV5k0tLWVklVuvLJpoHeb4WBdydm0= 32 | github.com/klauspost/cpuid/v2 v2.1.1/go.mod h1:RVVoqg1df56z8g3pUjL/3lE5UfnlrJX8tyFgg4nqhuY= 33 | github.com/klauspost/reedsolomon v1.11.7 h1:9uaHU0slncktTEEg4+7Vl7q7XUNMBUOK4R9gnKhMjAU= 34 | github.com/klauspost/reedsolomon v1.11.7/go.mod h1:4bXRN+cVzMdml6ti7qLouuYi32KHJ5MGv0Qd8a47h6A= 35 | github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4= 36 | github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0= 37 | github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM= 38 | github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4= 39 | github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA= 40 | github.com/sirupsen/logrus v1.9.0 h1:trlNQbNUG3OdDrDil03MCb1H2o9nJ1x4/5LYw7byDE0= 41 | github.com/sirupsen/logrus v1.9.0/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ= 42 | github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= 43 | github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw= 44 | github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo= 45 | github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg= 46 | github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg= 47 | github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU= 48 | github.com/stretchr/testify v1.8.2 h1:+h33VjcLVPDHtOdpUCuF+7gSuG3yGIftsP1YvFihtJ8= 49 | github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4= 50 | github.com/templexxx/cpufeat v0.0.0-20180724012125-cef66df7f161 h1:89CEmDvlq/F7SJEOqkIdNDGJXrQIhuIx9D2DBXjavSU= 51 | github.com/templexxx/cpufeat v0.0.0-20180724012125-cef66df7f161/go.mod h1:wM7WEvslTq+iOEAMDLSzhVuOt5BRZ05WirO+b09GHQU= 52 | github.com/templexxx/xor v0.0.0-20191217153810-f85b25db303b h1:fj5tQ8acgNUr6O8LEplsxDhUIe2573iLkJc+PqnzZTI= 53 | github.com/templexxx/xor v0.0.0-20191217153810-f85b25db303b/go.mod h1:5XA7W9S6mni3h5uvOC75dA3m9CCCaS83lltmc0ukdi4= 54 | github.com/tjfoc/gmsm v1.4.1 h1:aMe1GlZb+0bLjn+cKTPEvvn9oUEBlJitaZiiBwsbgho= 55 | github.com/tjfoc/gmsm v1.4.1/go.mod h1:j4INPkHWMrhJb38G+J6W4Tw0AbuN8Thu3PbdVYhVcTE= 56 | github.com/xtaci/kcp-go v5.4.20+incompatible h1:TN1uey3Raw0sTz0Fg8GkfM0uH3YwzhnZWQ1bABv5xAg= 57 | github.com/xtaci/kcp-go v5.4.20+incompatible/go.mod h1:bN6vIwHQbfHaHtFpEssmWsN45a+AZwO7eyRCmEIbtvE= 58 | github.com/xtaci/lossyconn v0.0.0-20200209145036-adba10fffc37 h1:EWU6Pktpas0n8lLQwDsRyZfmkPeRbdgPtW609es+/9E= 59 | github.com/xtaci/lossyconn v0.0.0-20200209145036-adba10fffc37/go.mod h1:HpMP7DB2CyokmAh4lp0EQnnWhmycP/TvwBGzvuie+H0= 60 | golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w= 61 | golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto= 62 | golang.org/x/crypto v0.0.0-20201012173705-84dcc777aaee/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto= 63 | golang.org/x/crypto v0.17.0 h1:r8bRNjWL3GshPW3gkd+RpvzWrZAwPS49OmTGZ/uhM4k= 64 | golang.org/x/crypto v0.17.0/go.mod h1:gCAAfMLgwOJRpTjQ2zCCt2OcSfYMTeZVSRtQlPC7Nq4= 65 | golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA= 66 | golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE= 67 | golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU= 68 | golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc= 69 | golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= 70 | golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= 71 | golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= 72 | golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= 73 | golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= 74 | golang.org/x/net v0.0.0-20201010224723-4f7140c49acb/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU= 75 | golang.org/x/net v0.17.0 h1:pVaXccu2ozPjCXewfr1S7xza/zcXTity9cCdXQYSjIM= 76 | golang.org/x/net v0.17.0/go.mod h1:NxSsAGuq816PNPmqtQdLE42eU2Fs7NoRIZrHJAlaCOE= 77 | golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U= 78 | golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= 79 | golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= 80 | golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= 81 | golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= 82 | golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= 83 | golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= 84 | golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= 85 | golang.org/x/sys v0.0.0-20220704084225-05e143d24a9e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= 86 | golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= 87 | golang.org/x/sys v0.15.0 h1:h48lPFYpsTvQJZF4EKyI4aLHaev3CxivZmv7yZig9pc= 88 | golang.org/x/sys v0.15.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA= 89 | golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= 90 | golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= 91 | golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= 92 | golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= 93 | golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY= 94 | golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs= 95 | golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q= 96 | golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= 97 | google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM= 98 | google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4= 99 | google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc= 100 | google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc= 101 | google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c= 102 | google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg= 103 | google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY= 104 | google.golang.org/grpc v1.31.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak= 105 | google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8= 106 | google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0= 107 | google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM= 108 | google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE= 109 | google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo= 110 | google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU= 111 | gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= 112 | gopkg.in/ini.v1 v1.67.0 h1:Dgnx+6+nfE+IfzjUEISNeydPJh9AXNNsWbGP9KzCsOA= 113 | gopkg.in/ini.v1 v1.67.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k= 114 | gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= 115 | gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= 116 | gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= 117 | honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= 118 | honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= 119 | -------------------------------------------------------------------------------- /server/flyserver.go: -------------------------------------------------------------------------------- 1 | package server 2 | 3 | import ( 4 | "github.com/asche910/flynet/fly" 5 | "net" 6 | ) 7 | 8 | type FlyServer struct { 9 | Mode int // which function to use, [1:'http', 2:'socks5', 3:'socks5-tcp', 4:'socks5-udp', 5:'forward'] 10 | //localHost string 11 | Ports []string // ports[0] stands for the listening port; others are for reserve 12 | Method string 13 | Password string 14 | //protocol string // tcp or udp protocol 15 | clients map[string]net.Conn 16 | } 17 | 18 | func (server *FlyServer) LocalSocks5Proxy(port string) { 19 | fly.StartSocks5(port) 20 | } 21 | 22 | func (server *FlyServer) LocalHttpProxy(port string) { 23 | fly.StartHttp(port) 24 | } 25 | 26 | func (server *FlyServer) Socks5ProxyForTCP(localPort, method, key string) { 27 | fly.Socks5ForServerByTCP(localPort, method, key) 28 | } 29 | 30 | func (server *FlyServer) Socks5ProxyForUDP(localPort string) { 31 | fly.Socks5ForServerByUDP(localPort) 32 | } 33 | 34 | func (server *FlyServer) PortForward(laborPort, queryPort string) { 35 | fly.PortForwardForServer(laborPort, queryPort) 36 | } 37 | --------------------------------------------------------------------------------