2021-09-14 07:28:10 +00:00
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package pxndscvm
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import (
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"bytes"
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"crypto/tls"
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"errors"
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"io"
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"io/ioutil"
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"net"
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"net/http"
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2021-09-24 00:15:15 +00:00
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// "net/url"
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2021-09-20 05:57:42 +00:00
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"sync/atomic"
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2021-09-14 07:28:10 +00:00
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"time"
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"golang.org/x/net/proxy"
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"h12.io/socks"
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)
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2021-09-24 00:15:15 +00:00
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func (s *Swamp) prepHTTP() (*http.Client, *http.Transport, *http.Request, error) {
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2021-09-14 07:28:10 +00:00
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req, err := http.NewRequest("GET", s.GetRandomEndpoint(), bytes.NewBuffer([]byte("")))
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if err != nil {
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2021-09-24 00:15:15 +00:00
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return nil, nil, nil, err
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2021-09-14 07:28:10 +00:00
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}
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headers := make(map[string]string)
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headers["User-Agent"] = s.RandomUserAgent()
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headers["Accept"] = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8"
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headers["Accept-Language"] = "en-US,en;q=0.5"
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headers["'Accept-Encoding'"] = "gzip, deflate, br"
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headers["Connection"] = "keep-alive"
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for header, value := range headers {
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req.Header.Set(header, value)
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}
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2021-09-23 16:06:49 +00:00
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var client *http.Client
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var transporter = &http.Transport{
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DisableKeepAlives: true,
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TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
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TLSHandshakeTimeout: time.Duration(s.GetValidationTimeout()) * time.Second,
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}
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2021-09-24 00:15:15 +00:00
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return client, transporter, req, err
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}
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func (s *Swamp) checkHTTP(sock *Proxy) (string, error) {
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var (
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client *http.Client
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transporter *http.Transport
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req *http.Request
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err error
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)
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if client, transporter, req, err = s.prepHTTP(); err != nil {
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return "", err
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}
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2021-09-23 16:06:49 +00:00
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2021-09-24 00:15:15 +00:00
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var t int
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switch sock.Proto {
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case "5":
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t = socks.SOCKS5
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case "4":
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t = socks.SOCKS4
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case "4a":
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t = socks.SOCKS4A
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}
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2021-09-14 07:28:10 +00:00
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2021-09-24 00:15:15 +00:00
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var dialSocks = socks.DialSocksProxy(t, sock.Endpoint)
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var transportDialer = dialSocks
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2021-09-14 07:28:10 +00:00
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if sock.Proto == "none" {
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transportDialer = proxy.Direct.Dial
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}
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2021-09-24 00:15:15 +00:00
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//if sock.Proto != "http" {
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transporter.Dial = transportDialer
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//} else {
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// if purl, err := url.Parse("http://" + sock.Endpoint); err == nil {
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// transporter.Proxy = http.ProxyURL(purl)
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// } else {
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// return "", err
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// }
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//}
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2021-09-14 07:28:10 +00:00
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client = &http.Client{
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Transport: transporter,
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Timeout: time.Duration(s.swampopt.validationTimeout) * time.Second,
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}
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resp, err := client.Do(req)
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if err != nil {
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return "", err
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}
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defer func(Body io.ReadCloser) {
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err := Body.Close()
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if err != nil {
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panic(err)
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}
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}(resp.Body)
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rbody, err := ioutil.ReadAll(resp.Body)
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return string(rbody), err
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}
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2021-09-20 05:57:42 +00:00
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func (s *Swamp) singleProxyCheck(sock *Proxy) error {
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2021-09-23 07:38:00 +00:00
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s.Stats.Checked++
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2021-09-14 07:28:10 +00:00
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if _, err := net.DialTimeout("tcp", sock.Endpoint, time.Duration(s.GetValidationTimeout())*time.Second); err != nil {
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2021-09-18 13:47:19 +00:00
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s.badProx.Check(sock)
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2021-09-14 07:28:10 +00:00
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return err
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}
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resp, err := s.checkHTTP(sock)
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if err != nil {
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2021-09-18 13:47:19 +00:00
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s.badProx.Check(sock)
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return err
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}
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if newip := net.ParseIP(resp); newip == nil {
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2021-09-18 13:47:19 +00:00
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s.badProx.Check(sock)
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2021-09-14 07:28:10 +00:00
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return errors.New("bad response from http request: " + resp)
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}
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sock.ProxiedIP = resp
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return nil
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}
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2021-09-20 08:49:06 +00:00
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func (sock *Proxy) validate() {
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2021-09-24 00:15:15 +00:00
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var sversions = []string{"4", "5", "4a"}
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2021-09-20 08:49:06 +00:00
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s := sock.parent
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if s.useProx.Check(sock) {
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s.dbgPrint(ylw + "useProx ratelimited: " + sock.Endpoint + rst)
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atomic.StoreUint32(&sock.lock, stateUnlocked)
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return
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}
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2021-09-14 07:28:10 +00:00
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2021-09-20 08:49:06 +00:00
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// determined as bad, won't try again until it expires from that cache
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if s.badProx.Peek(sock) {
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s.dbgPrint(ylw + "badProx ratelimited: " + sock.Endpoint + rst)
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atomic.StoreUint32(&sock.lock, stateUnlocked)
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return
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}
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2021-09-14 07:28:10 +00:00
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2021-09-20 08:49:06 +00:00
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// try to use the proxy with all 3 SOCKS versions
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var good = false
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for _, sver := range sversions {
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if s.Status == Paused {
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return
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2021-09-14 07:28:10 +00:00
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}
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2021-09-23 16:06:49 +00:00
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2021-09-20 08:49:06 +00:00
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sock.Proto = sver
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if err := s.singleProxyCheck(sock); err == nil {
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2021-09-24 00:15:15 +00:00
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// if sock.Proto != "http" {
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s.dbgPrint(grn + "verified " + sock.Endpoint + " as SOCKS" + sver + rst)
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// } else {
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// s.dbgPrint(ylw + "verified " + sock.Endpoint + " as http (not usable yet)" + rst)
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// }
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2021-09-20 08:49:06 +00:00
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good = true
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break
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2021-09-14 07:28:10 +00:00
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}
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2021-09-20 08:49:06 +00:00
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}
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2021-09-14 07:28:10 +00:00
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2021-09-20 08:49:06 +00:00
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if !good {
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s.dbgPrint(red + "failed to verify: " + sock.Endpoint)
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2021-09-20 08:49:06 +00:00
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sock.TimesBad++
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s.badProx.Check(sock)
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2021-09-20 05:57:42 +00:00
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atomic.StoreUint32(&sock.lock, stateUnlocked)
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2021-09-20 08:49:06 +00:00
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return
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}
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2021-09-14 07:28:10 +00:00
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2021-09-20 08:49:06 +00:00
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sock.TimesValidated++
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sock.LastVerified = time.Now()
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atomic.StoreUint32(&sock.lock, stateUnlocked)
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switch sock.Proto {
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case "4":
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2021-09-24 00:15:15 +00:00
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go func() {
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s.Stats.v4()
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s.ValidSocks4 <- sock
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}()
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return
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2021-09-20 08:49:06 +00:00
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case "4a":
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2021-09-24 00:15:15 +00:00
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go func() {
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s.Stats.v4a()
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s.ValidSocks4a <- sock
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}()
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return
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2021-09-20 08:49:06 +00:00
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case "5":
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2021-09-24 00:15:15 +00:00
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go func() {
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s.Stats.v5()
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s.ValidSocks5 <- sock
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}()
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return
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default:
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return
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2021-09-14 07:28:10 +00:00
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}
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}
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