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+
+                                 Apache License
+                           Version 2.0, January 2004
+                        https://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2015 Docker, Inc.
+
+   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
+
+       https://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.
@@ -0,0 +1,13 @@
+[![GoDoc](https://godoc.org/github.com/docker/go-connections?status.svg)](https://godoc.org/github.com/docker/go-connections)
+
+# Introduction
+
+go-connections provides common package to work with network connections.
+
+## Usage
+
+See the [docs in godoc](https://godoc.org/github.com/docker/go-connections) for examples and documentation.
+
+## License
+
+go-connections is licensed under the Apache License, Version 2.0. See [LICENSE](LICENSE) for the full license text.
@@ -0,0 +1,81 @@
+package sockets
+
+import (
+	"errors"
+	"net"
+	"sync"
+)
+
+var errClosed = errors.New("use of closed network connection")
+
+// InmemSocket implements net.Listener using in-memory only connections.
+type InmemSocket struct {
+	chConn  chan net.Conn
+	chClose chan struct{}
+	addr    string
+	mu      sync.Mutex
+}
+
+// dummyAddr is used to satisfy net.Addr for the in-mem socket
+// it is just stored as a string and returns the string for all calls
+type dummyAddr string
+
+// NewInmemSocket creates an in-memory only net.Listener
+// The addr argument can be any string, but is used to satisfy the `Addr()` part
+// of the net.Listener interface
+func NewInmemSocket(addr string, bufSize int) *InmemSocket {
+	return &InmemSocket{
+		chConn:  make(chan net.Conn, bufSize),
+		chClose: make(chan struct{}),
+		addr:    addr,
+	}
+}
+
+// Addr returns the socket's addr string to satisfy net.Listener
+func (s *InmemSocket) Addr() net.Addr {
+	return dummyAddr(s.addr)
+}
+
+// Accept implements the Accept method in the Listener interface; it waits for the next call and returns a generic Conn.
+func (s *InmemSocket) Accept() (net.Conn, error) {
+	select {
+	case conn := <-s.chConn:
+		return conn, nil
+	case <-s.chClose:
+		return nil, errClosed
+	}
+}
+
+// Close closes the listener. It will be unavailable for use once closed.
+func (s *InmemSocket) Close() error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	select {
+	case <-s.chClose:
+	default:
+		close(s.chClose)
+	}
+	return nil
+}
+
+// Dial is used to establish a connection with the in-mem server
+func (s *InmemSocket) Dial(network, addr string) (net.Conn, error) {
+	srvConn, clientConn := net.Pipe()
+	select {
+	case s.chConn <- srvConn:
+	case <-s.chClose:
+		return nil, errClosed
+	}
+
+	return clientConn, nil
+}
+
+// Network returns the addr string, satisfies net.Addr
+func (a dummyAddr) Network() string {
+	return string(a)
+}
+
+// String returns the string form
+func (a dummyAddr) String() string {
+	return string(a)
+}
@@ -0,0 +1,51 @@
+package sockets
+
+import (
+	"net"
+	"net/url"
+	"os"
+	"strings"
+
+	"golang.org/x/net/proxy"
+)
+
+// GetProxyEnv allows access to the uppercase and the lowercase forms of
+// proxy-related variables.  See the Go specification for details on these
+// variables. https://golang.org/pkg/net/http/
+func GetProxyEnv(key string) string {
+	proxyValue := os.Getenv(strings.ToUpper(key))
+	if proxyValue == "" {
+		return os.Getenv(strings.ToLower(key))
+	}
+	return proxyValue
+}
+
+// DialerFromEnvironment takes in a "direct" *net.Dialer and returns a
+// proxy.Dialer which will route the connections through the proxy using the
+// given dialer.
+func DialerFromEnvironment(direct *net.Dialer) (proxy.Dialer, error) {
+	allProxy := GetProxyEnv("all_proxy")
+	if len(allProxy) == 0 {
+		return direct, nil
+	}
+
+	proxyURL, err := url.Parse(allProxy)
+	if err != nil {
+		return direct, err
+	}
+
+	proxyFromURL, err := proxy.FromURL(proxyURL, direct)
+	if err != nil {
+		return direct, err
+	}
+
+	noProxy := GetProxyEnv("no_proxy")
+	if len(noProxy) == 0 {
+		return proxyFromURL, nil
+	}
+
+	perHost := proxy.NewPerHost(proxyFromURL, direct)
+	perHost.AddFromString(noProxy)
+
+	return perHost, nil
+}
@@ -0,0 +1,38 @@
+// Package sockets provides helper functions to create and configure Unix or TCP sockets.
+package sockets
+
+import (
+	"errors"
+	"net"
+	"net/http"
+	"time"
+)
+
+// Why 32? See https://github.com/docker/docker/pull/8035.
+const defaultTimeout = 32 * time.Second
+
+// ErrProtocolNotAvailable is returned when a given transport protocol is not provided by the operating system.
+var ErrProtocolNotAvailable = errors.New("protocol not available")
+
+// ConfigureTransport configures the specified Transport according to the
+// specified proto and addr.
+// If the proto is unix (using a unix socket to communicate) or npipe the
+// compression is disabled.
+func ConfigureTransport(tr *http.Transport, proto, addr string) error {
+	switch proto {
+	case "unix":
+		return configureUnixTransport(tr, proto, addr)
+	case "npipe":
+		return configureNpipeTransport(tr, proto, addr)
+	default:
+		tr.Proxy = http.ProxyFromEnvironment
+		dialer, err := DialerFromEnvironment(&net.Dialer{
+			Timeout: defaultTimeout,
+		})
+		if err != nil {
+			return err
+		}
+		tr.Dial = dialer.Dial
+	}
+	return nil
+}
@@ -0,0 +1,35 @@
+// +build !windows
+
+package sockets
+
+import (
+	"fmt"
+	"net"
+	"net/http"
+	"syscall"
+	"time"
+)
+
+const maxUnixSocketPathSize = len(syscall.RawSockaddrUnix{}.Path)
+
+func configureUnixTransport(tr *http.Transport, proto, addr string) error {
+	if len(addr) > maxUnixSocketPathSize {
+		return fmt.Errorf("Unix socket path %q is too long", addr)
+	}
+	// No need for compression in local communications.
+	tr.DisableCompression = true
+	tr.Dial = func(_, _ string) (net.Conn, error) {
+		return net.DialTimeout(proto, addr, defaultTimeout)
+	}
+	return nil
+}
+
+func configureNpipeTransport(tr *http.Transport, proto, addr string) error {
+	return ErrProtocolNotAvailable
+}
+
+// DialPipe connects to a Windows named pipe.
+// This is not supported on other OSes.
+func DialPipe(_ string, _ time.Duration) (net.Conn, error) {
+	return nil, syscall.EAFNOSUPPORT
+}
@@ -0,0 +1,27 @@
+package sockets
+
+import (
+	"net"
+	"net/http"
+	"time"
+
+	"github.com/Microsoft/go-winio"
+)
+
+func configureUnixTransport(tr *http.Transport, proto, addr string) error {
+	return ErrProtocolNotAvailable
+}
+
+func configureNpipeTransport(tr *http.Transport, proto, addr string) error {
+	// No need for compression in local communications.
+	tr.DisableCompression = true
+	tr.Dial = func(_, _ string) (net.Conn, error) {
+		return DialPipe(addr, defaultTimeout)
+	}
+	return nil
+}
+
+// DialPipe connects to a Windows named pipe.
+func DialPipe(addr string, timeout time.Duration) (net.Conn, error) {
+	return winio.DialPipe(addr, &timeout)
+}
@@ -0,0 +1,22 @@
+// Package sockets provides helper functions to create and configure Unix or TCP sockets.
+package sockets
+
+import (
+	"crypto/tls"
+	"net"
+)
+
+// NewTCPSocket creates a TCP socket listener with the specified address and
+// the specified tls configuration. If TLSConfig is set, will encapsulate the
+// TCP listener inside a TLS one.
+func NewTCPSocket(addr string, tlsConfig *tls.Config) (net.Listener, error) {
+	l, err := net.Listen("tcp", addr)
+	if err != nil {
+		return nil, err
+	}
+	if tlsConfig != nil {
+		tlsConfig.NextProtos = []string{"http/1.1"}
+		l = tls.NewListener(l, tlsConfig)
+	}
+	return l, nil
+}
@@ -0,0 +1,32 @@
+// +build !windows
+
+package sockets
+
+import (
+	"net"
+	"os"
+	"syscall"
+)
+
+// NewUnixSocket creates a unix socket with the specified path and group.
+func NewUnixSocket(path string, gid int) (net.Listener, error) {
+	if err := syscall.Unlink(path); err != nil && !os.IsNotExist(err) {
+		return nil, err
+	}
+	mask := syscall.Umask(0777)
+	defer syscall.Umask(mask)
+
+	l, err := net.Listen("unix", path)
+	if err != nil {
+		return nil, err
+	}
+	if err := os.Chown(path, 0, gid); err != nil {
+		l.Close()
+		return nil, err
+	}
+	if err := os.Chmod(path, 0660); err != nil {
+		l.Close()
+		return nil, err
+	}
+	return l, nil
+}
@@ -0,0 +1,202 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "{}"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright {yyyy} {name of copyright owner}
+
+   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.
+
@@ -0,0 +1,19 @@
+Docker
+Copyright 2012-2015 Docker, Inc.
+
+This product includes software developed at Docker, Inc. (https://www.docker.com).
+
+This product contains software (https://github.com/kr/pty) developed
+by Keith Rarick, licensed under the MIT License.
+
+The following is courtesy of our legal counsel:
+
+
+Use and transfer of Docker may be subject to certain restrictions by the
+United States and other governments.
+It is your responsibility to ensure that your use and/or transfer does not
+violate applicable laws.
+
+For more information, please see https://www.bis.doc.gov
+
+See also https://www.apache.org/dev/crypto.html and/or seek legal counsel.
@@ -0,0 +1,13 @@
+# go-plugins-helpers
+
+A collection of helper packages to extend Docker Engine in Go
+
+ Plugin type   | Documentation | Description
+ --------------|---------------|--------------------------------------------------
+ Authorization | [Link](https://docs.docker.com/engine/extend/authorization/)   | Extend API authorization mechanism
+ Network       | [Link](https://docs.docker.com/engine/extend/plugins_network/) | Extend network management
+ Volume        | [Link](https://docs.docker.com/engine/extend/plugins_volume/)  | Extend persistent storage
+ IPAM          | [Link](https://github.com/docker/libnetwork/blob/master/docs/ipam.md) | Extend IP address management
+ Graph (experimental) | [Link](https://github.com/docker/docker/blob/master/experimental/plugins_graphdriver.md) | Extend image and container fs storage
+
+See the [understand Docker plugins documentation section](https://docs.docker.com/engine/extend/plugins/).
@@ -0,0 +1,37 @@
+package sdk
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+)
+
+// DefaultContentTypeV1_1 is the default content type accepted and sent by the plugins.
+const DefaultContentTypeV1_1 = "application/vnd.docker.plugins.v1.1+json"
+
+// DecodeRequest decodes an http request into a given structure.
+func DecodeRequest(w http.ResponseWriter, r *http.Request, req interface{}) (err error) {
+	if err = json.NewDecoder(r.Body).Decode(req); err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+	}
+	return
+}
+
+// EncodeResponse encodes the given structure into an http response.
+func EncodeResponse(w http.ResponseWriter, res interface{}, err bool) {
+	w.Header().Set("Content-Type", DefaultContentTypeV1_1)
+	if err {
+		w.WriteHeader(http.StatusInternalServerError)
+	}
+	json.NewEncoder(w).Encode(res)
+}
+
+// StreamResponse streams a response object to the client
+func StreamResponse(w http.ResponseWriter, data io.ReadCloser) {
+	w.Header().Set("Content-Type", DefaultContentTypeV1_1)
+	if _, err := copyBuf(w, data); err != nil {
+		fmt.Printf("ERROR in stream: %v\n", err)
+	}
+	data.Close()
+}
@@ -0,0 +1,88 @@
+package sdk
+
+import (
+	"crypto/tls"
+	"fmt"
+	"net"
+	"net/http"
+	"os"
+)
+
+const activatePath = "/Plugin.Activate"
+
+// Handler is the base to create plugin handlers.
+// It initializes connections and sockets to listen to.
+type Handler struct {
+	mux *http.ServeMux
+}
+
+// NewHandler creates a new Handler with an http mux.
+func NewHandler(manifest string) Handler {
+	mux := http.NewServeMux()
+
+	mux.HandleFunc(activatePath, func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", DefaultContentTypeV1_1)
+		fmt.Fprintln(w, manifest)
+	})
+
+	return Handler{mux: mux}
+}
+
+// Serve sets up the handler to serve requests on the passed in listener
+func (h Handler) Serve(l net.Listener) error {
+	server := http.Server{
+		Addr:    l.Addr().String(),
+		Handler: h.mux,
+	}
+	return server.Serve(l)
+}
+
+// ServeTCP makes the handler to listen for request in a given TCP address.
+// It also writes the spec file in the right directory for docker to read.
+// Due to constrains for running Docker in Docker on Windows, data-root directory
+// of docker daemon must be provided. To get default directory, use
+// WindowsDefaultDaemonRootDir() function. On Unix, this parameter is ignored.
+func (h Handler) ServeTCP(pluginName, addr, daemonDir string, tlsConfig *tls.Config) error {
+	l, spec, err := newTCPListener(addr, pluginName, daemonDir, tlsConfig)
+	if err != nil {
+		return err
+	}
+	if spec != "" {
+		defer os.Remove(spec)
+	}
+	return h.Serve(l)
+}
+
+// ServeUnix makes the handler to listen for requests in a unix socket.
+// It also creates the socket file in the right directory for docker to read.
+func (h Handler) ServeUnix(addr string, gid int) error {
+	l, spec, err := newUnixListener(addr, gid)
+	if err != nil {
+		return err
+	}
+	if spec != "" {
+		defer os.Remove(spec)
+	}
+	return h.Serve(l)
+}
+
+// ServeWindows makes the handler to listen for request in a Windows named pipe.
+// It also creates the spec file in the right directory for docker to read.
+// Due to constrains for running Docker in Docker on Windows, data-root directory
+// of docker daemon must be provided. To get default directory, use
+// WindowsDefaultDaemonRootDir() function. On Unix, this parameter is ignored.
+func (h Handler) ServeWindows(addr, pluginName, daemonDir string, pipeConfig *WindowsPipeConfig) error {
+	l, spec, err := newWindowsListener(addr, pluginName, daemonDir, pipeConfig)
+	if err != nil {
+		return err
+	}
+	if spec != "" {
+		defer os.Remove(spec)
+	}
+	return h.Serve(l)
+}
+
+// HandleFunc registers a function to handle a request path with.
+func (h Handler) HandleFunc(path string, fn func(w http.ResponseWriter, r *http.Request)) {
+	h.mux.HandleFunc(path, fn)
+}
@@ -0,0 +1,18 @@
+package sdk
+
+import (
+	"io"
+	"sync"
+)
+
+const buffer32K = 32 * 1024
+
+var buffer32KPool = &sync.Pool{New: func() interface{} { return make([]byte, buffer32K) }}
+
+// copyBuf uses a shared buffer pool with io.CopyBuffer
+func copyBuf(w io.Writer, r io.Reader) (int64, error) {
+	buf := buffer32KPool.Get().([]byte)
+	written, err := io.CopyBuffer(w, r, buf)
+	buffer32KPool.Put(buf)
+	return written, err
+}
@@ -0,0 +1,58 @@
+package sdk
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+)
+
+type protocol string
+
+const (
+	protoTCP       protocol = "tcp"
+	protoNamedPipe protocol = "npipe"
+)
+
+// PluginSpecDir returns plugin spec dir in relation to daemon root directory.
+func PluginSpecDir(daemonRoot string) string {
+	return ([]string{filepath.Join(daemonRoot, "plugins")})[0]
+}
+
+// WindowsDefaultDaemonRootDir returns default data directory of docker daemon on Windows.
+func WindowsDefaultDaemonRootDir() string {
+	return filepath.Join(os.Getenv("programdata"), "docker")
+}
+
+func createPluginSpecDirWindows(name, address, daemonRoot string) (string, error) {
+	_, err := os.Stat(daemonRoot)
+	if os.IsNotExist(err) {
+		return "", fmt.Errorf("Deamon root directory must already exist: %s", err)
+	}
+
+	pluginSpecDir := PluginSpecDir(daemonRoot)
+
+	if err := windowsCreateDirectoryWithACL(pluginSpecDir); err != nil {
+		return "", err
+	}
+	return pluginSpecDir, nil
+}
+
+func createPluginSpecDirUnix(name, address string) (string, error) {
+	pluginSpecDir := PluginSpecDir("/etc/docker")
+	if err := os.MkdirAll(pluginSpecDir, 0755); err != nil {
+		return "", err
+	}
+	return pluginSpecDir, nil
+}
+
+func writeSpecFile(name, address, pluginSpecDir string, proto protocol) (string, error) {
+	specFileDir := filepath.Join(pluginSpecDir, name+".spec")
+
+	url := string(proto) + "://" + address
+	if err := ioutil.WriteFile(specFileDir, []byte(url), 0644); err != nil {
+		return "", err
+	}
+
+	return specFileDir, nil
+}
@@ -0,0 +1,34 @@
+package sdk
+
+import (
+	"crypto/tls"
+	"net"
+	"runtime"
+
+	"github.com/docker/go-connections/sockets"
+)
+
+func newTCPListener(address, pluginName, daemonDir string, tlsConfig *tls.Config) (net.Listener, string, error) {
+	listener, err := sockets.NewTCPSocket(address, tlsConfig)
+	if err != nil {
+		return nil, "", err
+	}
+
+	addr := listener.Addr().String()
+
+	var specDir string
+	if runtime.GOOS == "windows" {
+		specDir, err = createPluginSpecDirWindows(pluginName, addr, daemonDir)
+	} else {
+		specDir, err = createPluginSpecDirUnix(pluginName, addr)
+	}
+	if err != nil {
+		return nil, "", err
+	}
+
+	specFile, err := writeSpecFile(pluginName, addr, specDir, protoTCP)
+	if err != nil {
+		return nil, "", err
+	}
+	return listener, specFile, nil
+}
@@ -0,0 +1,35 @@
+// +build linux freebsd
+
+package sdk
+
+import (
+	"net"
+	"os"
+	"path/filepath"
+
+	"github.com/docker/go-connections/sockets"
+)
+
+const pluginSockDir = "/run/docker/plugins"
+
+func newUnixListener(pluginName string, gid int) (net.Listener, string, error) {
+	path, err := fullSocketAddress(pluginName)
+	if err != nil {
+		return nil, "", err
+	}
+	listener, err := sockets.NewUnixSocket(path, gid)
+	if err != nil {
+		return nil, "", err
+	}
+	return listener, path, nil
+}
+
+func fullSocketAddress(address string) (string, error) {
+	if err := os.MkdirAll(pluginSockDir, 0755); err != nil {
+		return "", err
+	}
+	if filepath.IsAbs(address) {
+		return address, nil
+	}
+	return filepath.Join(pluginSockDir, address+".sock"), nil
+}
@@ -0,0 +1,10 @@
+// +build linux freebsd
+// +build nosystemd
+
+package sdk
+
+import "net"
+
+func setupSocketActivation() (net.Listener, error) {
+	return nil, nil
+}
@@ -0,0 +1,45 @@
+// +build linux freebsd
+// +build !nosystemd
+
+package sdk
+
+import (
+	"fmt"
+	"net"
+	"os"
+
+	"github.com/coreos/go-systemd/activation"
+)
+
+// isRunningSystemd checks whether the host was booted with systemd as its init
+// system. This functions similarly to systemd's `sd_booted(3)`: internally, it
+// checks whether /run/systemd/system/ exists and is a directory.
+// http://www.freedesktop.org/software/systemd/man/sd_booted.html
+//
+// Copied from github.com/coreos/go-systemd/util.IsRunningSystemd
+func isRunningSystemd() bool {
+	fi, err := os.Lstat("/run/systemd/system")
+	if err != nil {
+		return false
+	}
+	return fi.IsDir()
+}
+
+func setupSocketActivation() (net.Listener, error) {
+	if !isRunningSystemd() {
+		return nil, nil
+	}
+	listenFds := activation.Files(false)
+	if len(listenFds) > 1 {
+		return nil, fmt.Errorf("expected only one socket from systemd, got %d", len(listenFds))
+	}
+	var listener net.Listener
+	if len(listenFds) == 1 {
+		l, err := net.FileListener(listenFds[0])
+		if err != nil {
+			return nil, err
+		}
+		listener = l
+	}
+	return listener, nil
+}
@@ -0,0 +1,16 @@
+// +build !linux,!freebsd
+
+package sdk
+
+import (
+	"errors"
+	"net"
+)
+
+var (
+	errOnlySupportedOnLinuxAndFreeBSD = errors.New("unix socket creation is only supported on Linux and FreeBSD")
+)
+
+func newUnixListener(pluginName string, gid int) (net.Listener, string, error) {
+	return nil, "", errOnlySupportedOnLinuxAndFreeBSD
+}
@@ -0,0 +1,70 @@
+// +build windows
+
+package sdk
+
+import (
+	"net"
+	"os"
+	"syscall"
+	"unsafe"
+
+	"github.com/Microsoft/go-winio"
+)
+
+// Named pipes use Windows Security Descriptor Definition Language to define ACL. Following are
+// some useful definitions.
+const (
+	// This will set permissions for everyone to have full access
+	AllowEveryone = "S:(ML;;NW;;;LW)D:(A;;0x12019f;;;WD)"
+
+	// This will set permissions for Service, System, Adminstrator group and account to have full access
+	AllowServiceSystemAdmin = "D:(A;ID;FA;;;SY)(A;ID;FA;;;BA)(A;ID;FA;;;LA)(A;ID;FA;;;LS)"
+)
+
+func newWindowsListener(address, pluginName, daemonRoot string, pipeConfig *WindowsPipeConfig) (net.Listener, string, error) {
+	winioPipeConfig := winio.PipeConfig{
+		SecurityDescriptor: pipeConfig.SecurityDescriptor,
+		InputBufferSize:    pipeConfig.InBufferSize,
+		OutputBufferSize:   pipeConfig.OutBufferSize,
+	}
+	listener, err := winio.ListenPipe(address, &winioPipeConfig)
+	if err != nil {
+		return nil, "", err
+	}
+
+	addr := listener.Addr().String()
+
+	specDir, err := createPluginSpecDirWindows(pluginName, addr, daemonRoot)
+	if err != nil {
+		return nil, "", err
+	}
+
+	spec, err := writeSpecFile(pluginName, addr, specDir, protoNamedPipe)
+	if err != nil {
+		return nil, "", err
+	}
+	return listener, spec, nil
+}
+
+func windowsCreateDirectoryWithACL(name string) error {
+	sa := syscall.SecurityAttributes{Length: 0}
+	sddl := "D:P(A;OICI;GA;;;BA)(A;OICI;GA;;;SY)"
+	sd, err := winio.SddlToSecurityDescriptor(sddl)
+	if err != nil {
+		return &os.PathError{Op: "mkdir", Path: name, Err: err}
+	}
+	sa.Length = uint32(unsafe.Sizeof(sa))
+	sa.InheritHandle = 1
+	sa.SecurityDescriptor = uintptr(unsafe.Pointer(&sd[0]))
+
+	namep, err := syscall.UTF16PtrFromString(name)
+	if err != nil {
+		return &os.PathError{Op: "mkdir", Path: name, Err: err}
+	}
+
+	e := syscall.CreateDirectory(namep, &sa)
+	if e != nil {
+		return &os.PathError{Op: "mkdir", Path: name, Err: e}
+	}
+	return nil
+}
@@ -0,0 +1,20 @@
+// +build !windows
+
+package sdk
+
+import (
+	"errors"
+	"net"
+)
+
+var (
+	errOnlySupportedOnWindows = errors.New("named pipe creation is only supported on Windows")
+)
+
+func newWindowsListener(address, pluginName, daemonRoot string, pipeConfig *WindowsPipeConfig) (net.Listener, string, error) {
+	return nil, "", errOnlySupportedOnWindows
+}
+
+func windowsCreateDirectoryWithACL(name string) error {
+	return nil
+}
@@ -0,0 +1,13 @@
+package sdk
+
+// WindowsPipeConfig is a helper structure for configuring named pipe parameters on Windows.
+type WindowsPipeConfig struct {
+	// SecurityDescriptor contains a Windows security descriptor in SDDL format.
+	SecurityDescriptor string
+
+	// InBufferSize in bytes.
+	InBufferSize int32
+
+	// OutBufferSize in bytes.
+	OutBufferSize int32
+}
@@ -0,0 +1,35 @@
+# Docker volume extension api.
+
+Go handler to create external volume extensions for Docker.
+
+## Usage
+
+This library is designed to be integrated in your program.
+
+1. Implement the `volume.Driver` interface.
+2. Initialize a `volume.Handler` with your implementation.
+3. Call either `ServeTCP` or `ServeUnix` from the `volume.Handler`.
+
+### Example using TCP sockets:
+
+```go
+  d := MyVolumeDriver{}
+  h := volume.NewHandler(d)
+  h.ServeTCP("test_volume", ":8080")
+```
+
+### Example using Unix sockets:
+
+```go
+  d := MyVolumeDriver{}
+  h := volume.NewHandler(d)
+  u, _ := user.Lookup("root")
+  gid, _ := strconv.Atoi(u.Gid)
+  h.ServeUnix("test_volume", gid)
+```
+
+## Full example plugins
+
+- https://github.com/calavera/docker-volume-glusterfs
+- https://github.com/calavera/docker-volume-keywhiz
+- https://github.com/quobyte/docker-volume
@@ -0,0 +1,229 @@
+package volume
+
+import (
+	"log"
+	"net/http"
+
+	"github.com/docker/go-plugins-helpers/sdk"
+)
+
+const (
+	// DefaultDockerRootDirectory is the default directory where volumes will be created.
+	DefaultDockerRootDirectory = "/var/lib/docker-volumes"
+
+	manifest         = `{"Implements": ["VolumeDriver"]}`
+	createPath       = "/VolumeDriver.Create"
+	getPath          = "/VolumeDriver.Get"
+	listPath         = "/VolumeDriver.List"
+	removePath       = "/VolumeDriver.Remove"
+	hostVirtualPath  = "/VolumeDriver.Path"
+	mountPath        = "/VolumeDriver.Mount"
+	unmountPath      = "/VolumeDriver.Unmount"
+	capabilitiesPath = "/VolumeDriver.Capabilities"
+)
+
+// CreateRequest is the structure that docker's requests are deserialized to.
+type CreateRequest struct {
+	Name    string
+	Options map[string]string `json:"Opts,omitempty"`
+}
+
+// RemoveRequest structure for a volume remove request
+type RemoveRequest struct {
+	Name string
+}
+
+// MountRequest structure for a volume mount request
+type MountRequest struct {
+	Name string
+	ID   string
+}
+
+// MountResponse structure for a volume mount response
+type MountResponse struct {
+	Mountpoint string
+}
+
+// UnmountRequest structure for a volume unmount request
+type UnmountRequest struct {
+	Name string
+	ID   string
+}
+
+// PathRequest structure for a volume path request
+type PathRequest struct {
+	Name string
+}
+
+// PathResponse structure for a volume path response
+type PathResponse struct {
+	Mountpoint string
+}
+
+// GetRequest structure for a volume get request
+type GetRequest struct {
+	Name string
+}
+
+// GetResponse structure for a volume get response
+type GetResponse struct {
+	Volume *Volume
+}
+
+// ListResponse structure for a volume list response
+type ListResponse struct {
+	Volumes []*Volume
+}
+
+// CapabilitiesResponse structure for a volume capability response
+type CapabilitiesResponse struct {
+	Capabilities Capability
+}
+
+// Volume represents a volume object for use with `Get` and `List` requests
+type Volume struct {
+	Name       string
+	Mountpoint string
+	Status     map[string]interface{}
+}
+
+// Capability represents the list of capabilities a volume driver can return
+type Capability struct {
+	Scope string
+}
+
+// ErrorResponse is a formatted error message that docker can understand
+type ErrorResponse struct {
+	Err string
+}
+
+// NewErrorResponse creates an ErrorResponse with the provided message
+func NewErrorResponse(msg string) *ErrorResponse {
+	return &ErrorResponse{Err: msg}
+}
+
+// Driver represent the interface a driver must fulfill.
+type Driver interface {
+	Create(*CreateRequest) error
+	List() (*ListResponse, error)
+	Get(*GetRequest) (*GetResponse, error)
+	Remove(*RemoveRequest) error
+	Path(*PathRequest) (*PathResponse, error)
+	Mount(*MountRequest) (*MountResponse, error)
+	Unmount(*UnmountRequest) error
+	Capabilities() *CapabilitiesResponse
+}
+
+// Handler forwards requests and responses between the docker daemon and the plugin.
+type Handler struct {
+	driver Driver
+	sdk.Handler
+}
+
+// NewHandler initializes the request handler with a driver implementation.
+func NewHandler(driver Driver) *Handler {
+	h := &Handler{driver, sdk.NewHandler(manifest)}
+	h.initMux()
+	return h
+}
+
+func (h *Handler) initMux() {
+	h.HandleFunc(createPath, func(w http.ResponseWriter, r *http.Request) {
+		log.Println("Entering go-plugins-helpers createPath")
+		req := &CreateRequest{}
+		err := sdk.DecodeRequest(w, r, req)
+		if err != nil {
+			return
+		}
+		err = h.driver.Create(req)
+		if err != nil {
+			sdk.EncodeResponse(w, NewErrorResponse(err.Error()), true)
+			return
+		}
+		sdk.EncodeResponse(w, struct{}{}, false)
+	})
+	h.HandleFunc(removePath, func(w http.ResponseWriter, r *http.Request) {
+		log.Println("Entering go-plugins-helpers removePath")
+		req := &RemoveRequest{}
+		err := sdk.DecodeRequest(w, r, req)
+		if err != nil {
+			return
+		}
+		err = h.driver.Remove(req)
+		if err != nil {
+			sdk.EncodeResponse(w, NewErrorResponse(err.Error()), true)
+			return
+		}
+		sdk.EncodeResponse(w, struct{}{}, false)
+	})
+	h.HandleFunc(mountPath, func(w http.ResponseWriter, r *http.Request) {
+		log.Println("Entering go-plugins-helpers mountPath")
+		req := &MountRequest{}
+		err := sdk.DecodeRequest(w, r, req)
+		if err != nil {
+			return
+		}
+		res, err := h.driver.Mount(req)
+		if err != nil {
+			sdk.EncodeResponse(w, NewErrorResponse(err.Error()), true)
+			return
+		}
+		sdk.EncodeResponse(w, res, false)
+	})
+	h.HandleFunc(hostVirtualPath, func(w http.ResponseWriter, r *http.Request) {
+		log.Println("Entering go-plugins-helpers hostVirtualPath")
+		req := &PathRequest{}
+		err := sdk.DecodeRequest(w, r, req)
+		if err != nil {
+			return
+		}
+		res, err := h.driver.Path(req)
+		if err != nil {
+			sdk.EncodeResponse(w, NewErrorResponse(err.Error()), true)
+			return
+		}
+		sdk.EncodeResponse(w, res, false)
+	})
+	h.HandleFunc(getPath, func(w http.ResponseWriter, r *http.Request) {
+		log.Println("Entering go-plugins-helpers getPath")
+		req := &GetRequest{}
+		err := sdk.DecodeRequest(w, r, req)
+		if err != nil {
+			return
+		}
+		res, err := h.driver.Get(req)
+		if err != nil {
+			sdk.EncodeResponse(w, NewErrorResponse(err.Error()), true)
+			return
+		}
+		sdk.EncodeResponse(w, res, false)
+	})
+	h.HandleFunc(unmountPath, func(w http.ResponseWriter, r *http.Request) {
+		log.Println("Entering go-plugins-helpers unmountPath")
+		req := &UnmountRequest{}
+		err := sdk.DecodeRequest(w, r, req)
+		if err != nil {
+			return
+		}
+		err = h.driver.Unmount(req)
+		if err != nil {
+			sdk.EncodeResponse(w, NewErrorResponse(err.Error()), true)
+			return
+		}
+		sdk.EncodeResponse(w, struct{}{}, false)
+	})
+	h.HandleFunc(listPath, func(w http.ResponseWriter, r *http.Request) {
+		log.Println("Entering go-plugins-helpers listPath")
+		res, err := h.driver.List()
+		if err != nil {
+			sdk.EncodeResponse(w, NewErrorResponse(err.Error()), true)
+			return
+		}
+		sdk.EncodeResponse(w, res, false)
+	})
+
+	h.HandleFunc(capabilitiesPath, func(w http.ResponseWriter, r *http.Request) {
+		log.Println("Entering go-plugins-helpers capabilitiesPath")
+		sdk.EncodeResponse(w, h.driver.Capabilities(), false)
+	})
+}