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fixed a bug in strategy.go which may leads to infinite recursion in the condition of all remote proxy disabled.

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This commit is contained in:
nadoo 2017-07-16 12:16:50 +08:00
parent 1f13a8d1e8
commit 0d01e8a4eb
5 changed files with 22 additions and 18 deletions
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5
README.md
View File

@ -5,11 +5,6 @@ glider is a forward proxy with several protocols support.
go get -u github.com/nadoo/glider go get -u github.com/nadoo/glider
## Build
cd $GOPATH/src/github.com/nadoo/glider
go build
## Usage ## Usage
```bash ```bash
glider v0.1 usage: glider v0.1 usage:

11
dnstun.go
View File

@ -23,19 +23,18 @@ func DNSTunProxy(addr, raddr string, upProxy Proxy) (Proxy, error) {
return s, nil return s, nil
} }
// ListenAndServe redirected requests as a server. // ListenAndServe .
func (s *dnstun) ListenAndServe() { func (s *dnstun) ListenAndServe() {
l, err := net.ListenPacket("udp", s.addr) l, err := net.ListenPacket("udp", s.addr)
if err != nil { if err != nil {
logf("failed to listen on %s: %v", s.addr, err) logf("failed to listen on %s: %v", s.addr, err)
return return
} }
defer l.Close()
logf("listening UDP on %s", s.addr) logf("listening UDP on %s", s.addr)
for { for {
defer l.Close()
data := make([]byte, 512) data := make([]byte, 512)
n, clientAddr, err := l.ReadFrom(data) n, clientAddr, err := l.ReadFrom(data)
if err != nil { if err != nil {
@ -60,7 +59,7 @@ func (s *dnstun) ListenAndServe() {
rc.Write(length) rc.Write(length)
rc.Write(data) rc.Write(data)
buf, err := ioutil.ReadAll(rc) resp, err := ioutil.ReadAll(rc)
if err != nil { if err != nil {
logf("error in ioutil.ReadAll: %s\n", err) logf("error in ioutil.ReadAll: %s\n", err)
return return
@ -68,8 +67,8 @@ func (s *dnstun) ListenAndServe() {
// length is not needed in udp dns response. (2 bytes) // length is not needed in udp dns response. (2 bytes)
// SEE RFC1035, section 4.2.2 TCP: The message is prefixed with a two byte length field which gives the message length, excluding the two byte length field. // SEE RFC1035, section 4.2.2 TCP: The message is prefixed with a two byte length field which gives the message length, excluding the two byte length field.
if len(buf) > 2 { if len(resp) > 2 {
msg := buf[2:] msg := resp[2:]
_, err = l.WriteTo(msg, clientAddr) _, err = l.WriteTo(msg, clientAddr)
if err != nil { if err != nil {
logf("error in local write: %s\n", err) logf("error in local write: %s\n", err)

1
http.go
View File

@ -38,6 +38,7 @@ func (s *httpproxy) ListenAndServe() {
logf("failed to listen on %s: %v", s.addr, err) logf("failed to listen on %s: %v", s.addr, err)
return return
} }
defer l.Close()
logf("listening TCP on %s", s.addr) logf("listening TCP on %s", s.addr)

9
proxy.go
View File

@ -141,14 +141,15 @@ func check(p Proxy, target string, duration int) {
startTime := time.Now() startTime := time.Now()
c, err := p.Dial("tcp", target) c, err := p.Dial("tcp", target)
if err != nil { if err != nil {
logf("proxy-check %s -> %s, error: %s, set to disabled.", p.Addr(), config.CheckSite, err) logf("proxy-check %s -> %s, set to DISABLED. error: %s", p.Addr(), config.CheckSite, err)
p.SetEnable(false) p.SetEnable(false)
continue continue
} }
dialTime := time.Since(startTime)
c.Close() c.Close()
p.SetEnable(true) p.SetEnable(true)
logf("proxy-check: %s -> %s, connect time: %d", p.Addr(), config.CheckSite, dialTime)
// TODO: choose the fastest proxy.
dialTime := time.Since(startTime)
logf("proxy-check: %s -> %s, connect time: %s", p.Addr(), config.CheckSite, dialTime.String())
} }
} }

12
strategy.go
View File

@ -38,9 +38,17 @@ func (p *strategyProxy) NextProxy() Proxy {
return p.forwarders[0] return p.forwarders[0]
} }
found := false
for i := 0; i < n; i++ {
p.idx = (p.idx + 1) % n p.idx = (p.idx + 1) % n
if !p.forwarders[p.idx].Enabled() { if p.forwarders[p.idx].Enabled() {
return p.NextProxy() found = true
break
}
}
if !found {
logf("NO AVALIABLE PROXY FOUND! please check your network or proxy server settings.")
} }
return p.forwarders[p.idx] return p.forwarders[p.idx]