WIP

router/router.go

@@ -0,0 +1,117 @@
+package router
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"net"
+
+	vhost "github.com/inconshreveable/go-vhost"
+)
+
+type Director func(host string) (*net.TCPAddr, error)
+
+type proxyRouter struct {
+	director Director
+}
+
+func (r *proxyRouter) Listen(laddr string) {
+	l, err := net.Listen("tcp", laddr)
+	defer l.Close()
+	if err != nil {
+		log.Fatal(err)
+	}
+	for {
+		conn, err := l.Accept()
+		if err != nil {
+			log.Println(err)
+			continue
+		}
+		go r.handleConnection(conn)
+	}
+}
+
+func (r *proxyRouter) handleConnection(c net.Conn) {
+	defer c.Close()
+	// first try tls
+	vhostConn, err := vhost.TLS(c)
+	if err != nil {
+		log.Printf("Incoming TLS connection produced an error. Error: %s", err)
+		return
+	}
+	defer vhostConn.Close()
+
+	host := vhostConn.ClientHelloMsg.ServerName
+	c.LocalAddr()
+	dstHost, err := r.director(fmt.Sprintf("%s:%d", host, 12))
+	if err != nil {
+		log.Printf("Error directing request: %v\n", err)
+		return
+	}
+
+	d, err := net.Dial("tcp", dstHost.String())
+	if err != nil {
+		log.Printf("Error dialing backend %s: %v\n", dstHost.String(), err)
+		return
+	}
+
+	errc := make(chan error, 2)
+	cp := func(dst io.Writer, src io.Reader) {
+		_, err := io.Copy(dst, src)
+		errc <- err
+	}
+	go cp(d, vhostConn)
+	go cp(vhostConn, d)
+	<-errc
+	/*
+		req, err := http.ReadRequest(bufio.NewReader(c))
+		if err != nil {
+			log.Println(err)
+			return
+		}
+
+		log.Println(req.Header)
+	*/
+}
+
+func NewRouter(director Director) *proxyRouter {
+	return &proxyRouter{director: director}
+}
+
+/*
+	// Start the DNS server
+	dns.HandleFunc(".", routerDns.DnsRequest)
+	udpDnsServer := &dns.Server{Addr: ":53", Net: "udp"}
+	go func() {
+		err := udpDnsServer.ListenAndServe()
+		if err != nil {
+			log.Fatal(err)
+		}
+	}()
+	tcpDnsServer := &dns.Server{Addr: ":53", Net: "tcp"}
+	go func() {
+		err := tcpDnsServer.ListenAndServe()
+		if err != nil {
+			log.Fatal(err)
+		}
+	}()
+	r := mux.NewRouter()
+	tcpHandler := handlers.NewTCPProxy()
+	r.Host(fmt.Sprintf("{subdomain:.*}pwd{node:%s}-{port:%s}.{tld:.*}", config.PWDHostnameRegex, config.PortRegex)).Handler(tcpHandler)
+	r.Host(fmt.Sprintf("{subdomain:.*}pwd{node:%s}.{tld:.*}", config.PWDHostnameRegex)).Handler(tcpHandler)
+	r.Host(fmt.Sprintf("pwd{alias:%s}-{session:%s}-{port:%s}.{tld:.*}", config.AliasnameRegex, config.AliasSessionRegex, config.PortRegex)).Handler(tcpHandler)
+	r.Host(fmt.Sprintf("pwd{alias:%s}-{session:%s}.{tld:.*}", config.AliasnameRegex, config.AliasSessionRegex)).Handler(tcpHandler)
+	r.HandleFunc("/ping", handlers.Ping).Methods("GET")
+	n := negroni.Classic()
+	n.UseHandler(r)
+
+	httpServer := http.Server{
+		Addr:              "0.0.0.0:" + config.PortNumber,
+		Handler:           n,
+		IdleTimeout:       30 * time.Second,
+		ReadHeaderTimeout: 5 * time.Second,
+	}
+	// Now listen for TLS connections that need to be proxied
+	tls.StartTLSProxy(config.SSLPortNumber)
+	http.ListenAndServe()
+*/