想将mysql 的TCP 封死,所有外部链接由我的proxy来控制,so 写了一个 tcp 转 unix socket 的 proxy。
package main import ( "os" "fmt" "net" "io" "sync" "time" ) type proxy struct{ Host string Port string Local string } func runProxy(list []proxy) { wg := sync.WaitGroup{} for _, v := range list { wg.Add(1) go func() { eachServer(v.Host, v.Port, v.Local) wg.Done() }() } wg.Wait() } func eachServer(host string, port string, local string) { l,err := net.Listen("tcp", fmt.Sprintf("%s:%s", host, port)) if err != nil { fmt.Print("listen tcp :%s",err.Error()) os.Exit(1) } defer l.Close() for { tc,err := l.Accept() if err != nil { fmt.Printf("accept tcp conn :%s",err.Error()) tc.Close() continue } go eachConn(local, tc) } } func eachConn(local string, tc net.Conn) { uc,err := net.Dial("unix", local) if err != nil { fmt.Printf("get unix conn :%s",err.Error()) uc.Close() return } go io.Copy(tc, uc) go io.Copy(uc, tc) } func main() { list := []proxy{proxy{Host:"192.168.8.101",Port:"3306",Local:"/home/work/data/tmp/mysql3306.sock"}} runProxy(list) }
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