111 lines
2.4 KiB
Go
111 lines
2.4 KiB
Go
package prox5
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import (
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"sync/atomic"
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"time"
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)
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// Socks5Str gets a SOCKS5 proxy that we have fully verified (dialed and then retrieved our IP address from a what-is-my-ip endpoint.
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// Will block if one is not available!
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func (s *Swamp) Socks5Str() string {
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for {
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select {
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case sock := <-s.ValidSocks5:
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if !s.stillGood(sock) {
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continue
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}
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s.Stats.dispense()
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return sock.Endpoint
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}
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}
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}
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// Socks4Str gets a SOCKS4 proxy that we have fully verified.
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// Will block if one is not available!
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func (s *Swamp) Socks4Str() string {
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defer s.Stats.dispense()
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for {
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select {
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case sock := <-s.ValidSocks4:
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if !s.stillGood(sock) {
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continue
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}
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return sock.Endpoint
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}
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}
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}
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// Socks4aStr gets a SOCKS4 proxy that we have fully verified.
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// Will block if one is not available!
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func (s *Swamp) Socks4aStr() string {
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defer s.Stats.dispense()
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for {
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select {
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case sock := <-s.ValidSocks4a:
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if !s.stillGood(sock) {
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continue
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}
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return sock.Endpoint
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}
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}
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}
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// GetAnySOCKS retrieves any version SOCKS proxy as a Proxy type
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// Will block if one is not available!
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func (s *Swamp) GetAnySOCKS() *Proxy {
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defer s.Stats.dispense()
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for {
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select {
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case sock := <-s.ValidSocks4:
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if s.stillGood(sock) {
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return sock
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}
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continue
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case sock := <-s.ValidSocks4a:
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if s.stillGood(sock) {
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return sock
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}
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continue
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case sock := <-s.ValidSocks5:
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if s.stillGood(sock) {
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return sock
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}
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continue
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default:
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// s.dbgPrint(red + "no valid proxies in channels, sleeping" + rst)
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time.Sleep(3 * time.Second)
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}
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}
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}
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func (s *Swamp) stillGood(sock *Proxy) bool {
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for !atomic.CompareAndSwapUint32(&sock.lock, stateUnlocked, stateLocked) {
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randSleep()
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}
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defer atomic.StoreUint32(&sock.lock, stateUnlocked)
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if sock.timesBad.Load().(int) > s.GetRemoveAfter() && s.GetRemoveAfter() != -1 {
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s.dbgPrint(red + "deleting from map (too many failures): " + sock.Endpoint + rst)
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if err := s.swampmap.delete(sock.Endpoint); err != nil {
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s.dbgPrint(red + err.Error() + rst)
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}
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}
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if s.badProx.Peek(sock) {
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s.dbgPrint(ylw + "badProx dial ratelimited: " + sock.Endpoint + rst)
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return false
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}
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if s.swampopt.stale.Load().(time.Duration) == 0 {
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return true
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}
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since := time.Since(sock.lastValidated.Load().(time.Time))
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if since > s.swampopt.stale.Load().(time.Duration) {
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s.dbgPrint("proxy stale: " + sock.Endpoint)
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go s.Stats.stale()
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return false
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}
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return true
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}
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