├── .gitignore ├── .travis.yml ├── LICENSE ├── README.md ├── cacert.pem ├── ip.go ├── message.go ├── sni.go ├── sni.json └── sniip.txt /.gitignore: -------------------------------------------------------------------------------- 1 | # Compiled Object files, Static and Dynamic libs (Shared Objects) 2 | *.o 3 | *.a 4 | *.so 5 | 6 | # Folders 7 | _obj 8 | _test 9 | _out 10 | 11 | # Architecture specific extensions/prefixes 12 | *.[568vq] 13 | [568vq].out 14 | 15 | *.cgo1.go 16 | *.cgo2.c 17 | _cgo_defun.c 18 | _cgo_gotypes.go 19 | _cgo_export.* 20 | 21 | _testmain.go 22 | 23 | *.exe 24 | *.test 25 | *.prof 26 | *.txt 27 | !sniip.txt 28 | -------------------------------------------------------------------------------- /.travis.yml: -------------------------------------------------------------------------------- 1 | language: go 2 | 3 | go: 4 | - 1.8 5 | - tip 6 | -------------------------------------------------------------------------------- /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 | {one line to give the program's name and a brief idea of what it does.} 635 | Copyright (C) {year} {name of author} 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 | {project} Copyright (C) {year} {fullname} 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 | # go-sni-detector 2 | 3 | [![Build Status](https://travis-ci.org/johnsonz/go-sni-detector.svg?branch=master)](https://travis-ci.org/johnsonz/go-sni-detector) [![GPLv3 License](https://img.shields.io/badge/license-GPLv3-blue.svg)](https://github.com/johnsonz/go-sni-detector/blob/master/LICENSE) 4 | ============ 5 | 6 | ## 说明 7 | 用于扫描SNI服务器，sniip_ok.txt中的延迟值为配置中指定的各server_name的延迟的平均值。 8 | 9 | 由于在初始化时读取了所有ip以便执行去重操作，所以会消耗大量的内存，对于需要扫描大量ip且机器性能不够强大的用户，请将`soft_mode`置为`true`。 10 | 11 | 请将待测试的ip段放到sniip.txt文件，支持以下ip格式： 12 | 13 | 1. 127.0.0.1 14 | 2. 127.0.0.0/24 15 | 3. 127.0.0.0-127.0.0.255 16 | 4. 127.0.0.0-127.0.0. 17 | 5. 127.0.0.-127.0.1. 18 | 19 | ## 下载地址 20 | [Latest release](https://github.com/johnsonz/go-sni-detector/releases) 21 | 22 | ## 高级用法 23 | 支持命令，优先级高于配置文件，通过指定`-r`命令可以直接将指定的参数写入到配置文件。 24 | ``` 25 | Usage: go-sni-detector [COMMAND] [VARS] 26 | 27 | SUPPORT COMMANDS: 28 | -h, --help help message 29 | -a, --allhostname lookup all hostname of ip, or lookup the first one by default 30 | -r, --override override settings 31 | -m, --softmode reduce memory usage 32 | 33 | SUPPORT VARS: 34 | -i, --snifile<=path> put your ip ranges into this file 35 | -o, --outputfile<=path> output sni ip to this file 36 | -j, --jsonfile<=path> output sni ip as json format to this file 37 | -c, --concurrency<=number> concurrency 38 | -t, --timeout<=number> timeout 39 | -ht, --handshaketimeout<=number> handshake timeout 40 | -d, --delay<=number> delay 41 | -s, --servername<=string> comma-separated server names 42 | ``` 43 | 44 | ## 配置说明 45 | `"concurrency":1000` 并发线程数，可根据自己的硬件配置调整 46 | 47 | `"delay":1200` 扫描完成后，提取所有小于等于该延迟的ip 48 | 49 | `"server_name"` 用于测试SNI服务器的域名，以逗号分隔 50 | 51 | `"soft_mode"` 边读取ip边扫描，适合需要扫描大量ip且内存较小的用户 52 | 53 | ## Windows 平台 54 | 针对Windows平台出了浏览器模式，目前功能正在完善中。项目使用了websocket，参见[Web Sockets浏览器兼容一览表](http://caniuse.mojijs.com/Home/Html/item/key/websockets/index.html)判断浏览器是否兼容websocket。 55 | 56 | ## Wiki 57 | [Wiki](https://plumwine.me/go-sni-detector-usage-wiki/) 58 | 59 | ## 其它工具 60 | 扫描google ip工具：[go-checkiptools](https://github.com/johnsonz/go-checkiptools) 61 | -------------------------------------------------------------------------------- /ip.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "bytes" 5 | "fmt" 6 | "io/ioutil" 7 | "net" 8 | "strconv" 9 | "strings" 10 | ) 11 | 12 | //IP struct 13 | type IP struct { 14 | Address string 15 | Delay int 16 | HostName string 17 | } 18 | 19 | //IPs []IP 20 | type IPs []IP 21 | 22 | //Len return the length of []IP 23 | func (ips IPs) Len() int { 24 | return len(ips) 25 | } 26 | 27 | //Swap swap two value of []IP 28 | func (ips IPs) Swap(i, j int) { 29 | ips[i], ips[j] = ips[j], ips[i] 30 | } 31 | 32 | //ByDelay sort by delay 33 | type ByDelay struct { 34 | IPs 35 | } 36 | 37 | //Less return false if the first value less than the second one 38 | func (s ByDelay) Less(i, j int) bool { 39 | return s.IPs[i].Delay < s.IPs[j].Delay 40 | } 41 | 42 | //get all sni ip range from sniip.txt file 43 | func getSNIIPRange() []string { 44 | m := make(map[string]string) 45 | var ipRanges []string 46 | bytes, err := ioutil.ReadFile(sniIPFileName) 47 | checkErr(fmt.Sprintf("read file %s error: ", sniIPFileName), err, Error) 48 | 49 | lines := strings.Split(string(bytes), "\n") 50 | for _, line := range lines { 51 | line = strings.Replace(line, "\r", "", -1) 52 | line = strings.TrimSpace(line) 53 | if len(line) > 7 { 54 | m[line] = line 55 | } 56 | } 57 | for _, v := range m { 58 | ipRanges = append(ipRanges, v) 59 | } 60 | 61 | return ipRanges 62 | } 63 | 64 | /** 65 | Parse sni ip range, support the following formats: 66 | 1. xxx.xxx.xxx.xxx 67 | 2. xxx.xxx.xxx.xxx/xx 68 | 3. xxx.xxx.xxx.xxx-xxx.xxx.xxx.xxx 69 | 4. xxx.xxx.xxx.xxx-xxx. 70 | 5. xxx.-xxx. 71 | */ 72 | func parseSNIIPRange(ipRange string) []string { 73 | var ips []string 74 | if strings.Contains(ipRange, "/") { 75 | //CIDR: https://zh.wikipedia.org/wiki/%E6%97%A0%E7%B1%BB%E5%88%AB%E5%9F%9F%E9%97%B4%E8%B7%AF%E7%94%B1 76 | ip, ipNet, err := net.ParseCIDR(ipRange) 77 | checkErr(fmt.Sprintf("parse CIDR %s error: ", ipRange), err, Error) 78 | 79 | for iptmp := ip.Mask(ipNet.Mask); ipNet.Contains(iptmp); inc(iptmp) { 80 | ips = append(ips, iptmp.String()) 81 | } 82 | // remove network address and broadcast address 83 | return ips[1 : len(ips)-1] 84 | } else if strings.Contains(ipRange, "-") { 85 | startIP := ipRange[:strings.Index(ipRange, "-")] 86 | endIP := ipRange[strings.Index(ipRange, "-")+1:] 87 | if strings.HasSuffix(startIP, ".") { 88 | switch strings.Count(startIP, ".") { 89 | case 1: 90 | startIP += "0.0.0" 91 | case 2: 92 | startIP += "0.0" 93 | case 3: 94 | startIP += "0" 95 | } 96 | } 97 | if strings.HasSuffix(endIP, ".") { 98 | switch strings.Count(endIP, ".") { 99 | case 1: 100 | endIP += "255.255.255" 101 | case 2: 102 | endIP += "255.255" 103 | case 3: 104 | endIP += "255" 105 | } 106 | } 107 | sIP := net.ParseIP(startIP) 108 | eIP := net.ParseIP(endIP) 109 | 110 | for ip := sIP; bytes.Compare(ip, eIP) <= 0; inc(ip) { 111 | ips = append(ips, ip.String()) 112 | 113 | } 114 | } else { 115 | ips = append(ips, ipRange) 116 | } 117 | 118 | return ips 119 | } 120 | 121 | //get all sni ip 122 | func getSNIIP() []string { 123 | var ips []string 124 | ipRanges := getSNIIPRange() 125 | for _, ipRange := range ipRanges { 126 | ips = append(ips, parseSNIIPRange(ipRange)...) 127 | } 128 | 129 | return ips 130 | } 131 | 132 | //get all sni ip 133 | func getSNIIPQueue() { 134 | ipRanges := getSNIIPRange() 135 | for _, ipRange := range ipRanges { 136 | parsedips := parseSNIIPRange(ipRange) 137 | for _, ip := range parsedips { 138 | totalips <- ip 139 | } 140 | } 141 | } 142 | 143 | func inc(ip net.IP) { 144 | for j := len(ip) - 1; j >= 0; j-- { 145 | ip[j]++ 146 | if ip[j] > 0 { 147 | break 148 | } 149 | } 150 | } 151 | 152 | //get last ip 153 | func getLastOkIP() []IP { 154 | m := make(map[string]IP) 155 | var checkedip IP 156 | var ips []IP 157 | if isFileExist(sniResultFileName) { 158 | bytes, err := ioutil.ReadFile(sniResultFileName) 159 | checkErr(fmt.Sprintf("read file %s error: ", sniResultFileName), err, Error) 160 | lines := strings.Split(string(bytes), "\n") 161 | for _, line := range lines { 162 | ipinfo := strings.Split(line, " ") 163 | if len(ipinfo) == 2 || len(ipinfo) == 3 { 164 | checkedip.Address = ipinfo[0] 165 | delay, err := strconv.Atoi(ipinfo[1][:len(ipinfo[1])-2]) 166 | checkErr("delay conversion failed: ", err, Warning) 167 | checkedip.Delay = delay 168 | hostname := "-" 169 | if len(ipinfo) == 3 { 170 | hostname = ipinfo[2] 171 | } 172 | checkedip.HostName = hostname 173 | m[ipinfo[0]] = checkedip 174 | } 175 | } 176 | } 177 | for _, v := range m { 178 | ips = append(ips, v) 179 | } 180 | return ips 181 | } 182 | 183 | //get last no ip 184 | func getLastNoIP() (ips []string) { 185 | m := make(map[string]string) 186 | if isFileExist(sniNoFileName) { 187 | bytes, err := ioutil.ReadFile(sniNoFileName) 188 | checkErr(fmt.Sprintf("read file %s error: ", sniNoFileName), err, Error) 189 | lines := strings.Split(string(bytes), "\n") 190 | for _, line := range lines { 191 | line = strings.Replace(line, "\r", "", -1) 192 | ipinfo := strings.Split(line, " ") 193 | if len(ipinfo[0]) > 6 { 194 | m[ipinfo[0]] = ipinfo[0] 195 | } 196 | } 197 | } 198 | for _, v := range m { 199 | ips = append(ips, v) 200 | } 201 | return ips 202 | } 203 | 204 | //remove scanned ip 205 | func getDifference(s, t []string) (ips []string) { 206 | if len(t) == 0 { 207 | return s 208 | } 209 | for _, vs := range s { 210 | flag := false 211 | for _, vt := range t { 212 | if vs == vt { 213 | flag = true 214 | break 215 | } 216 | } 217 | if !flag { 218 | ips = append(ips, vs) 219 | } 220 | } 221 | return ips 222 | } 223 | -------------------------------------------------------------------------------- /message.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | const ( 4 | helpMsg string = "help message" 5 | allHostnameMsg string = "lookup all hostname of ip" 6 | overrideMsg string = "override settings" 7 | sniFileMsg string = "ip range file" 8 | outputFileMsg string = "output sni ip file" 9 | jsonFileMsg string = "output json sni ip file" 10 | concurrencyMsg string = "concurrency" 11 | timeoutMsg string = "timeout" 12 | handshakeTimeoutMsg string = "handshake timeout" 13 | delayMsg string = "delay" 14 | serverNameMsg string = "comma-separated server names" 15 | softModeMsg string = "reduce memory usage" 16 | ) 17 | -------------------------------------------------------------------------------- /sni.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "bufio" 5 | "bytes" 6 | "crypto/tls" 7 | "crypto/x509" 8 | "encoding/json" 9 | "errors" 10 | "flag" 11 | "fmt" 12 | "io/ioutil" 13 | "net" 14 | "os" 15 | "sort" 16 | "strings" 17 | "time" 18 | 19 | "github.com/fatih/color" 20 | "github.com/golang/glog" 21 | ) 22 | 23 | //SNI config 24 | type SNI struct { 25 | Concurrency int `json:"concurrency"` 26 | Timeout int `json:"timeout"` 27 | HandshakeTimeout int `json:"handshake_timeout"` 28 | Delay int `json:"delay"` 29 | ServerName []string `json:"server_name"` 30 | SortByDelay bool `json:"sort_by_delay"` 31 | AlwaysCheck bool `json:"always_check_all_ip"` 32 | SoftMode bool `json:"soft_mode"` 33 | OutputAllHostname bool 34 | IsOverride bool 35 | } 36 | 37 | const ( 38 | configFileName string = "sni.json" 39 | certFileName string = "cacert.pem" 40 | ) 41 | 42 | var ( 43 | sniIPFileName = "sniip.txt" 44 | sniResultFileName = "sniip_ok.txt" 45 | sniNoFileName = "sniip_no.txt" 46 | sniJSONFileName = "ip.txt" 47 | statusFileName = ".status" 48 | ) 49 | 50 | //custom log level 51 | const ( 52 | Info = iota 53 | Warning 54 | Debug 55 | Error 56 | ) 57 | 58 | var config SNI 59 | var certPool *x509.CertPool 60 | var tlsConfig *tls.Config 61 | var dialer net.Dialer 62 | var totalips chan string 63 | 64 | func init() { 65 | parseConfig() 66 | loadCertPem() 67 | } 68 | func main() { 69 | 70 | usage() 71 | showConfig() 72 | time.Sleep(5 * time.Second) 73 | 74 | createFile() 75 | 76 | var ips []string 77 | status := getStatus() 78 | status = strings.Replace(strings.Replace(status, "\n", "", -1), "\r", "", -1) 79 | 80 | var lastOKIP []string 81 | for _, ip := range getLastOkIP() { 82 | lastOKIP = append(lastOKIP, ip.Address) 83 | } 84 | 85 | if config.SoftMode { 86 | totalips = make(chan string, config.Concurrency) 87 | go func() { 88 | for _, ip := range lastOKIP { 89 | totalips <- ip 90 | } 91 | getSNIIPQueue() 92 | close(totalips) 93 | }() 94 | 95 | goto Queue 96 | } 97 | 98 | if config.AlwaysCheck { 99 | ips = getSNIIP() 100 | } else { 101 | if status == "true" { 102 | fmt.Println("所有IP已扫描，5秒钟后将执行重新扫描。") 103 | for i := 1; i < 6; i++ { 104 | time.Sleep(time.Millisecond * 1000) 105 | fmt.Print("\r", i, "s") 106 | } 107 | err := os.Truncate(sniNoFileName, 0) 108 | checkErr(fmt.Sprintf("truncate file %s error: ", sniNoFileName), err, Error) 109 | ips = getSNIIP() 110 | } else { 111 | ips = getDifference(getSNIIP(), getLastNoIP()) 112 | } 113 | } 114 | 115 | ips = append(lastOKIP, ips...) 116 | Queue: 117 | err := os.Truncate(sniResultFileName, 0) 118 | checkErr(fmt.Sprintf("truncate file %s error: ", sniResultFileName), err, Error) 119 | write2File("false", statusFileName) 120 | jobs := make(chan string, config.Concurrency) 121 | done := make(chan bool, config.Concurrency) 122 | 123 | //check all sni ip begin 124 | t0 := time.Now() 125 | go func() { 126 | if config.SoftMode { 127 | for ip := range totalips { 128 | jobs <- ip 129 | } 130 | } else { 131 | for _, ip := range ips { 132 | jobs <- ip 133 | } 134 | } 135 | close(jobs) 136 | }() 137 | for ip := range jobs { 138 | done <- true 139 | go checkIP(ip, done) 140 | } 141 | for i := 0; i < cap(done); i++ { 142 | done <- true 143 | } 144 | t1 := time.Now() 145 | cost := int(t1.Sub(t0).Seconds()) 146 | rawipnum, jsonipnum := getJSONIP() 147 | updateConfig(config.IsOverride) 148 | write2File("true", statusFileName) 149 | fmt.Printf("\ntime: %ds, ok ip count: %d, matched ip with delay(%dms) count: %d\n\n", cost, rawipnum, config.Delay, jsonipnum) 150 | fmt.Scanln() 151 | } 152 | 153 | //Load cacert.pem 154 | func loadCertPem() { 155 | certpem, err := ioutil.ReadFile(certFileName) 156 | checkErr(fmt.Sprintf("read pem file %s error: ", certFileName), err, Error) 157 | certPool = x509.NewCertPool() 158 | if !certPool.AppendCertsFromPEM(certpem) { 159 | checkErr(fmt.Sprintf("load pem file %s error: ", certFileName), errors.New("load pem file error"), Error) 160 | } 161 | } 162 | func checkIP(ip string, done chan bool) { 163 | defer func() { 164 | <-done 165 | appendIP2File(IP{Address: ip, Delay: 0, HostName: "-"}, sniNoFileName) 166 | }() 167 | delays := make([]int, len(config.ServerName)) 168 | dialer = net.Dialer{ 169 | Timeout: time.Millisecond * time.Duration(config.Timeout), 170 | KeepAlive: 0, 171 | DualStack: false, 172 | } 173 | Next: 174 | for i, server := range config.ServerName { 175 | conn, err := dialer.Dial("tcp", net.JoinHostPort(ip, "443")) 176 | if err != nil { 177 | checkErr(fmt.Sprintf("%s dial error: ", ip), err, Debug) 178 | return 179 | } 180 | defer conn.Close() 181 | 182 | tlsConfig = &tls.Config{ 183 | RootCAs: certPool, 184 | InsecureSkipVerify: false, 185 | ServerName: server, 186 | } 187 | 188 | t0 := time.Now() 189 | tlsClient := tls.Client(conn, tlsConfig) 190 | tlsClient.SetDeadline(time.Now().Add(time.Millisecond * time.Duration(config.HandshakeTimeout))) 191 | err = tlsClient.Handshake() 192 | 193 | if err != nil { 194 | checkErr(fmt.Sprintf("%s handshake error: ", ip), err, Debug) 195 | return 196 | } 197 | defer tlsClient.Close() 198 | t1 := time.Now() 199 | delays[i] = int(t1.Sub(t0).Seconds() * 1000) 200 | if tlsClient.ConnectionState().PeerCertificates == nil { 201 | checkErr(fmt.Sprintf("%s peer certificates error: ", ip), errors.New("peer certificates is nil"), Debug) 202 | return 203 | } 204 | 205 | //peerCertSubject := tlsClient.ConnectionState().PeerCertificates[0].Subject 206 | DNSNames := tlsClient.ConnectionState().PeerCertificates[0].DNSNames 207 | //commonName := peerCertSubject.CommonName 208 | for _, DNSName := range DNSNames { 209 | if DNSName == server || DNSName == strings.Replace(server, "www", "*", -1) { 210 | continue Next 211 | } 212 | } 213 | return 214 | } 215 | sum := 0 216 | for _, d := range delays { 217 | sum += d 218 | } 219 | delay := sum / len(delays) 220 | 221 | hostname := "-" 222 | addr, err := net.LookupAddr(ip) 223 | if err == nil { 224 | if len(addr) > 0 { 225 | if config.OutputAllHostname { 226 | hostname = strings.Join(addr, "|") 227 | } else { 228 | hostname = addr[0] 229 | } 230 | } 231 | } 232 | 233 | checkErr(fmt.Sprintf("%s %dms %s, sni ip, recorded.", ip, delay, hostname), errors.New(""), Info) 234 | 235 | appendIP2File(IP{Address: ip, Delay: delay, HostName: hostname}, sniResultFileName) 236 | } 237 | 238 | //Parse config file 239 | func parseConfig() { 240 | conf, err := ioutil.ReadFile(configFileName) 241 | checkErr("read config file error: ", err, Error) 242 | 243 | var lines []string 244 | for _, line := range strings.Split(strings.Replace(string(conf), "\r\n", "\n", -1), "\n") { 245 | line = strings.TrimSpace(line) 246 | if !strings.HasPrefix(line, "//") && line != "" { 247 | lines = append(lines, line) 248 | } 249 | } 250 | 251 | var b bytes.Buffer 252 | for i, line := range lines { 253 | if len(lines)-1 > i { 254 | nextLine := lines[i+1] 255 | if nextLine == "]" || nextLine == "]," || nextLine == "}" || nextLine == "}," { 256 | if strings.HasSuffix(line, ",") { 257 | line = strings.TrimSuffix(line, ",") 258 | } 259 | } 260 | } 261 | b.WriteString(line) 262 | } 263 | 264 | err = json.Unmarshal(b.Bytes(), &config) 265 | checkErr("parse config file error: ", err, Error) 266 | } 267 | 268 | func getStatus() string { 269 | status, err := ioutil.ReadFile(statusFileName) 270 | checkErr(fmt.Sprintf("read file %s error: ", statusFileName), err, Error) 271 | return string(status[:]) 272 | } 273 | 274 | //Create files if they donnot exist, or truncate them. 275 | func createFile() { 276 | if !isFileExist(sniResultFileName) { 277 | _, err := os.Create(sniResultFileName) 278 | checkErr(fmt.Sprintf("create file %s error: ", sniResultFileName), err, Error) 279 | } 280 | if !isFileExist(sniJSONFileName) { 281 | _, err := os.Create(sniJSONFileName) 282 | checkErr(fmt.Sprintf("create file %s error: ", sniJSONFileName), err, Error) 283 | } 284 | if !isFileExist(sniNoFileName) { 285 | _, err := os.Create(sniNoFileName) 286 | checkErr(fmt.Sprintf("create file %s error: ", sniNoFileName), err, Error) 287 | } 288 | if !isFileExist(statusFileName) { 289 | _, err := os.Create(statusFileName) 290 | checkErr(fmt.Sprintf("create file %s error: ", statusFileName), err, Error) 291 | } 292 | } 293 | 294 | //CheckErr checks given error 295 | func checkErr(messge string, err error, level int) { 296 | if err != nil { 297 | switch level { 298 | case Info: 299 | color.Set(color.FgGreen) 300 | defer color.Unset() 301 | glog.Infoln(messge, err) 302 | case Warning, Debug: 303 | glog.Infoln(messge, err) 304 | case Error: 305 | glog.Fatalln(messge, err) 306 | } 307 | } 308 | } 309 | 310 | func updateConfig(isOverride bool) { 311 | if isOverride { 312 | write2File( 313 | fmt.Sprintf(`{ 314 | "concurrency":%d, 315 | "timeout":%d, 316 | "handshake_timeout":%d, 317 | "delay":%d, 318 | "server_name":[ 319 | %s 320 | ], 321 | "sort_by_delay":%t, 322 | "always_check_all_ip":%t, 323 | "soft_mode":%t 324 | }`, config.Concurrency, config.Timeout, config.HandshakeTimeout, config.Delay, 325 | fmt.Sprint("\"", strings.Join(config.ServerName, "\",\n \""), "\""), config.SortByDelay, config.AlwaysCheck, config.SoftMode), configFileName) 326 | fmt.Println("update sni.json successfully") 327 | } 328 | } 329 | 330 | //Whether file exists. 331 | func isFileExist(file string) bool { 332 | _, err := os.Stat(file) 333 | if err != nil && os.IsNotExist(err) { 334 | return false 335 | } 336 | return true 337 | } 338 | func getJSONIP() (rawipnum, jsonipnum int) { 339 | var rawiplist, jsoniplist []string 340 | okIPs := getLastOkIP() 341 | if config.SortByDelay { 342 | sort.Sort(ByDelay{IPs(okIPs)}) 343 | } 344 | for _, ip := range okIPs { 345 | rawiplist = append(rawiplist, fmt.Sprintf("%s %dms %s", ip.Address, ip.Delay, ip.HostName)) 346 | if ip.Delay <= config.Delay { 347 | jsoniplist = append(jsoniplist, ip.Address) 348 | } 349 | } 350 | 351 | ipstr := strings.Join(rawiplist, "\n") 352 | rawipnum = len(rawiplist) 353 | write2File(ipstr, sniResultFileName) 354 | jsonip := strings.Join(jsoniplist, "|") 355 | jsonip += "\n\n\n" 356 | jsonip += `"` 357 | jsonip += strings.Join(jsoniplist, `","`) 358 | jsonip += `"` 359 | jsonipnum = len(jsoniplist) 360 | write2File(jsonip, sniJSONFileName) 361 | return 362 | } 363 | 364 | //append ip to related file 365 | func appendIP2File(ip IP, filename string) { 366 | f, err := os.OpenFile(filename, os.O_APPEND|os.O_WRONLY, os.ModeAppend) 367 | checkErr(fmt.Sprintf("open file %s error: ", filename), err, Error) 368 | defer f.Close() 369 | 370 | _, err = f.WriteString(fmt.Sprintf("%s %dms %s\n", ip.Address, ip.Delay, ip.HostName)) 371 | checkErr(fmt.Sprintf("append ip to file %s error: ", filename), err, Error) 372 | f.Close() 373 | } 374 | 375 | //write ip to related file 376 | func write2File(str string, filename string) { 377 | err := os.Truncate(filename, 0) 378 | checkErr(fmt.Sprintf("truncate file %s error: ", filename), err, Error) 379 | err = ioutil.WriteFile(filename, []byte(str), 0755) 380 | checkErr(fmt.Sprintf("write ip to file %s error: ", filename), err, Error) 381 | } 382 | 383 | func usage() { 384 | flag.Usage = func() { 385 | fmt.Printf(` 386 | Usage: go-sni-detector [COMMANDS] [VARS] 387 | 388 | SUPPORT COMMANDS: 389 | -h, --help %s 390 | -a, --allhostname %s 391 | -r, --override %s 392 | -m, --softmode %s 393 | 394 | SUPPORT VARS: 395 | -i, --snifile %s (default: %s) 396 | -o, --outputfile %s (default: %s) 397 | -j, --jsonfile %s (default: %s) 398 | -c, --concurrency %s (default: %d) 399 | -t, --timeout %s (default: %dms) 400 | -ht, --handshaketimeout %s (default: %dms) 401 | -d, --delay %s (default: %dms) 402 | -s, --servername %s (default: %s) 403 | `, helpMsg, allHostnameMsg, overrideMsg, softModeMsg, sniFileMsg, sniIPFileName, outputFileMsg, sniResultFileName, jsonFileMsg, sniJSONFileName, concurrencyMsg, config.Concurrency, timeoutMsg, config.Timeout, handshakeTimeoutMsg, config.HandshakeTimeout, delayMsg, config.Delay, serverNameMsg, strings.Join(config.ServerName, ", ")) 404 | } 405 | var ( 406 | outputAllHostname bool 407 | sniFile string 408 | outputFile string 409 | jsonFile string 410 | concurrency int 411 | timeout int 412 | handshaketimeout int 413 | delay int 414 | serverNames string 415 | isOverride bool 416 | softMode bool 417 | ) 418 | 419 | flag.BoolVar(&outputAllHostname, "a", false, allHostnameMsg) 420 | flag.BoolVar(&outputAllHostname, "allhostname", false, allHostnameMsg) 421 | flag.StringVar(&sniFile, "i", sniIPFileName, sniFileMsg) 422 | flag.StringVar(&sniFile, "snifile", sniIPFileName, sniFileMsg) 423 | flag.StringVar(&outputFile, "o", sniResultFileName, outputFileMsg) 424 | flag.StringVar(&outputFile, "outputfile", sniResultFileName, outputFileMsg) 425 | flag.StringVar(&jsonFile, "j", sniJSONFileName, jsonFileMsg) 426 | flag.StringVar(&jsonFile, "jsonfile", sniJSONFileName, jsonFileMsg) 427 | flag.IntVar(&concurrency, "c", config.Concurrency, concurrencyMsg) 428 | flag.IntVar(&concurrency, "concurrency", config.Concurrency, concurrencyMsg) 429 | flag.IntVar(&timeout, "t", config.Timeout, timeoutMsg) 430 | flag.IntVar(&timeout, "timeout", config.Timeout, timeoutMsg) 431 | flag.IntVar(&handshaketimeout, "ht", config.HandshakeTimeout, handshakeTimeoutMsg) 432 | flag.IntVar(&handshaketimeout, "handshaketimeout", config.HandshakeTimeout, handshakeTimeoutMsg) 433 | flag.IntVar(&delay, "d", config.Delay, delayMsg) 434 | flag.IntVar(&delay, "delay", config.Delay, delayMsg) 435 | flag.StringVar(&serverNames, "s", strings.Join(config.ServerName, ", "), serverNameMsg) 436 | flag.StringVar(&serverNames, "servername", strings.Join(config.ServerName, ", "), serverNameMsg) 437 | flag.BoolVar(&isOverride, "r", false, overrideMsg) 438 | flag.BoolVar(&isOverride, "override", false, overrideMsg) 439 | flag.BoolVar(&softMode, "m", config.SoftMode, overrideMsg) 440 | flag.BoolVar(&softMode, "softmode", config.SoftMode, overrideMsg) 441 | 442 | flag.Set("logtostderr", "true") 443 | flag.Parse() 444 | 445 | sniIPFileName = sniFile 446 | sniResultFileName = outputFile 447 | sniJSONFileName = jsonFile 448 | 449 | if !isFileExist(sniFile) { 450 | fmt.Printf("file %s not found.\n", sniIPFileName) 451 | return 452 | } 453 | 454 | config.OutputAllHostname = outputAllHostname 455 | config.Concurrency = concurrency 456 | config.Timeout = timeout 457 | config.HandshakeTimeout = handshaketimeout 458 | config.Delay = delay 459 | sNs := strings.Split(serverNames, ",") 460 | for i, sn := range sNs { 461 | sNs[i] = strings.TrimSpace(sn) 462 | } 463 | config.ServerName = sNs 464 | config.IsOverride = isOverride 465 | config.SoftMode = softMode 466 | } 467 | func showConfig() { 468 | fmt.Printf(` 469 | ********************************************************************** 470 | Concurrency: %d 471 | Timeout: %dms 472 | Handshake timeout: %dms 473 | Delay: %dms 474 | Server name(s): %s 475 | Sort by delay: %t 476 | Always check all ip: %t 477 | Output all hostname: %t 478 | Soft mode: %t 479 | **********************************************************************`, config.Concurrency, config.Timeout, config.HandshakeTimeout, config.Delay, strings.Join(config.ServerName, ", "), config.SortByDelay, config.AlwaysCheck, config.OutputAllHostname, config.SoftMode) 480 | fmt.Println() 481 | } 482 | func getInputFromCommand() string { 483 | reader := bufio.NewReader(os.Stdin) 484 | input, _ := reader.ReadString('\n') 485 | input = strings.Replace(strings.Replace(input, "\n", "", -1), "\r", "", -1) 486 | return input 487 | } 488 | -------------------------------------------------------------------------------- /sni.json: -------------------------------------------------------------------------------- 1 | { 2 | "concurrency":100, 3 | "timeout":8000, 4 | "handshake_timeout":8000, 5 | "delay":1200, 6 | "server_name":[ 7 | "www.google.com", 8 | "www.bing.com" 9 | ], 10 | "sort_by_delay":true, 11 | "always_check_all_ip":true, 12 | "soft_mode":false 13 | } 14 | -------------------------------------------------------------------------------- /sniip.txt: -------------------------------------------------------------------------------- 1 | 219.76.4.0/24 2 | --------------------------------------------------------------------------------