vendor files

vendor/k8s.io/apimachinery/pkg/util/proxy/dial.go

@@ -0,0 +1,115 @@
+/*
+Copyright 2015 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package proxy
+
+import (
+	"crypto/tls"
+	"fmt"
+	"net"
+	"net/http"
+	"net/url"
+
+	"github.com/golang/glog"
+
+	utilnet "k8s.io/apimachinery/pkg/util/net"
+	"k8s.io/apimachinery/third_party/forked/golang/netutil"
+)
+
+func DialURL(url *url.URL, transport http.RoundTripper) (net.Conn, error) {
+	dialAddr := netutil.CanonicalAddr(url)
+
+	dialer, err := utilnet.DialerFor(transport)
+	if err != nil {
+		glog.V(5).Infof("Unable to unwrap transport %T to get dialer: %v", transport, err)
+	}
+
+	switch url.Scheme {
+	case "http":
+		if dialer != nil {
+			return dialer("tcp", dialAddr)
+		}
+		return net.Dial("tcp", dialAddr)
+	case "https":
+		// Get the tls config from the transport if we recognize it
+		var tlsConfig *tls.Config
+		var tlsConn *tls.Conn
+		var err error
+		tlsConfig, err = utilnet.TLSClientConfig(transport)
+		if err != nil {
+			glog.V(5).Infof("Unable to unwrap transport %T to get at TLS config: %v", transport, err)
+		}
+
+		if dialer != nil {
+			// We have a dialer; use it to open the connection, then
+			// create a tls client using the connection.
+			netConn, err := dialer("tcp", dialAddr)
+			if err != nil {
+				return nil, err
+			}
+			if tlsConfig == nil {
+				// tls.Client requires non-nil config
+				glog.Warningf("using custom dialer with no TLSClientConfig. Defaulting to InsecureSkipVerify")
+				// tls.Handshake() requires ServerName or InsecureSkipVerify
+				tlsConfig = &tls.Config{
+					InsecureSkipVerify: true,
+				}
+			} else if len(tlsConfig.ServerName) == 0 && !tlsConfig.InsecureSkipVerify {
+				// tls.Handshake() requires ServerName or InsecureSkipVerify
+				// infer the ServerName from the hostname we're connecting to.
+				inferredHost := dialAddr
+				if host, _, err := net.SplitHostPort(dialAddr); err == nil {
+					inferredHost = host
+				}
+				// Make a copy to avoid polluting the provided config
+				tlsConfigCopy := tlsConfig.Clone()
+				tlsConfigCopy.ServerName = inferredHost
+				tlsConfig = tlsConfigCopy
+			}
+			tlsConn = tls.Client(netConn, tlsConfig)
+			if err := tlsConn.Handshake(); err != nil {
+				netConn.Close()
+				return nil, err
+			}
+
+		} else {
+			// Dial
+			tlsConn, err = tls.Dial("tcp", dialAddr, tlsConfig)
+			if err != nil {
+				return nil, err
+			}
+		}
+
+		// Return if we were configured to skip validation
+		if tlsConfig != nil && tlsConfig.InsecureSkipVerify {
+			return tlsConn, nil
+		}
+
+		// Verify
+		host, _, _ := net.SplitHostPort(dialAddr)
+		if tlsConfig != nil && len(tlsConfig.ServerName) > 0 {
+			host = tlsConfig.ServerName
+		}
+		if err := tlsConn.VerifyHostname(host); err != nil {
+			tlsConn.Close()
+			return nil, err
+		}
+
+		return tlsConn, nil
+	default:
+		return nil, fmt.Errorf("Unknown scheme: %s", url.Scheme)
+	}
+}