188 lines
3.6 KiB
Go
188 lines
3.6 KiB
Go
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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"strconv"
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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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func (s *Swamp) feed() {
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s.dbgPrint("swamp feed start")
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for {
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if s.Status == Paused {
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return
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}
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select {
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case s.Pending <- randStrChoice(s.scvm):
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//
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case <-s.quit:
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s.dbgPrint("feed() paused")
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return
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default:
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time.Sleep(1 * time.Second)
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}
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}
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}
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func (s *Swamp) checkHTTP(sock Proxy) (string, error) {
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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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return "", err
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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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var dialSocks = socks.Dial("socks" + sock.Proto + "://" +
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sock.Endpoint + "?timeout=" + strconv.Itoa(s.GetValidationTimeout()) + "s")
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var client *http.Client
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var transporter = dialSocks
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if sock.Proto == "none" {
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transporter = proxy.Direct.Dial
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}
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//goland:noinspection GoDeprecation
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client = &http.Client{
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Transport: &http.Transport{
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Dial: transporter,
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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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}
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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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func (s *Swamp) singleProxyCheck(sock Proxy) error {
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if _, err := net.DialTimeout("tcp", sock.Endpoint, time.Duration(s.GetValidationTimeout())*time.Second); err != nil {
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badProx.Check(sock)
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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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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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badProx.Check(sock)
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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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func (s *Swamp) validate() {
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var sversions = []string{"5", "4", "4a"}
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for {
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if s.Status == Paused {
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return
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}
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sock := <-s.Pending
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p := Proxy{
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Endpoint: sock,
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}
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// ratelimited
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if useProx.Check(p) {
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s.dbgPrint(ylw + "useProx ratelimited: " + p.Endpoint + rst)
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continue
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}
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// determined as bad, won't try again until it expires from that cache
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if badProx.Peek(p) {
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s.dbgPrint(ylw + "badProx ratelimited: " + p.Endpoint + rst)
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continue
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}
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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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}
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p.Proto = sver
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if err := s.singleProxyCheck(p); err == nil {
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s.dbgPrint(grn + "verified " + p.Endpoint + " as SOCKS" + sver + rst)
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good = true
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break
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}
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}
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if !good {
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// s.dbgPrint(ylw + "failed to verify " + p.Endpoint + rst)
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badProx.Check(p)
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continue
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}
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p.Verified = time.Now()
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switch p.Proto {
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case "4":
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go s.Stats.v4()
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s.Socks4 <- p
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case "4a":
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go s.Stats.v4a()
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s.Socks4a <- p
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case "5":
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go s.Stats.v5()
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s.Socks5 <- p
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}
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}
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}
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func (s *Swamp) tossUp() {
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s.dbgPrint("tossUp() proxy checking loop start")
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for {
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if s.Status == Paused {
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return
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}
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select {
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case <-s.quit:
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s.dbgPrint("tossUp() paused")
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return
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default:
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go s.pool.Submit(s.validate)
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time.Sleep(time.Duration(10) * time.Millisecond)
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}
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}
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}
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