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Merge pull request #614 from aledbf/refactor-passthrough
Refactor nginx ssl passthrough
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,90 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "io" | ||
| "net" | ||
|
|
||
| "github.com/golang/glog" | ||
| "github.com/paultag/sniff/parser" | ||
| ) | ||
|
|
||
| type server struct { | ||
| Hostname string | ||
| IP string | ||
| Port int | ||
| } | ||
|
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| type proxy struct { | ||
| ServerList []*server | ||
| Default *server | ||
| } | ||
|
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| func (p *proxy) Get(host string) *server { | ||
| for _, s := range p.ServerList { | ||
| if s.Hostname == host { | ||
| return s | ||
| } | ||
| } | ||
|
|
||
| return &server{ | ||
| Hostname: "localhost", | ||
| IP: "127.0.0.1", | ||
| Port: 442, | ||
| } | ||
| } | ||
|
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| func (p *proxy) Handle(conn net.Conn) { | ||
| defer conn.Close() | ||
| data := make([]byte, 4096) | ||
|
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| length, err := conn.Read(data) | ||
| if err != nil { | ||
| glog.V(4).Infof("error reading the first 4k of the connection: %s", err) | ||
| return | ||
| } | ||
|
|
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| var proxy *server | ||
| hostname, err := parser.GetHostname(data[:]) | ||
| if err == nil { | ||
| glog.V(3).Infof("parsed hostname from TLS Client Hello: %s", hostname) | ||
| proxy = p.Get(hostname) | ||
| if proxy == nil { | ||
| return | ||
| } | ||
| } else { | ||
| proxy = p.Default | ||
| if proxy == nil { | ||
| return | ||
| } | ||
| } | ||
|
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| clientConn, err := net.Dial("tcp", fmt.Sprintf("%s:%d", proxy.IP, proxy.Port)) | ||
| if err != nil { | ||
| return | ||
| } | ||
| defer clientConn.Close() | ||
|
|
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| _, err = clientConn.Write(data[:length]) | ||
| if err != nil { | ||
| clientConn.Close() | ||
| } | ||
| pipe(clientConn, conn) | ||
| } | ||
|
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| func pipe(client, server net.Conn) { | ||
| doCopy := func(s, c net.Conn, cancel chan<- bool) { | ||
| io.Copy(s, c) | ||
| cancel <- true | ||
| } | ||
|
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| cancel := make(chan bool, 2) | ||
|
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| go doCopy(server, client, cancel) | ||
| go doCopy(client, server, cancel) | ||
|
|
||
| select { | ||
| case <-cancel: | ||
| return | ||
| } | ||
| } |
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