First commit

middleware/proxy/reverseproxy.go

@@ -0,0 +1,36 @@
+// Package proxy is middleware that proxies requests.
+package proxy
+
+import (
+	"github.com/miekg/coredns/middleware"
+	"github.com/miekg/dns"
+)
+
+type ReverseProxy struct {
+	Host   string
+	Client Client
+}
+
+func (p ReverseProxy) ServeDNS(w dns.ResponseWriter, r *dns.Msg, extra []dns.RR) error {
+	// TODO(miek): use extra!
+	var (
+		reply *dns.Msg
+		err   error
+	)
+	context := middleware.Context{W: w, Req: r}
+
+	// tls+tcp ?
+	if context.Proto() == "tcp" {
+		reply, err = middleware.Exchange(p.Client.TCP, r, p.Host)
+	} else {
+		reply, err = middleware.Exchange(p.Client.UDP, r, p.Host)
+	}
+
+	if err != nil {
+		return err
+	}
+	reply.Compress = true
+	reply.Id = r.Id
+	w.WriteMsg(reply)
+	return nil
+}