Initial varlink implementation

Signed-off-by: baude <bbaude@redhat.com>

Closes: #627
Approved by: mheon

19 files changed, 2678 insertions, 0 deletions

diff --git a/vendor/github.com/varlink/go/.gitignore b/vendor/github.com/varlink/go/.gitignore
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/vendor/github.com/varlink/go/.gitignore
diff --git a/vendor/github.com/varlink/go/.travis.yml b/vendor/github.com/varlink/go/.travis.yml
new file mode 100644
index 000000000..990f12e0a
--- /dev/null
+++ b/vendor/github.com/varlink/go/.travis.yml
@@ -0,0 +1,13 @@
+language: go
+sudo: false
+go:
+- '1.9'
+- 1.10.x
+install:
+- go get golang.org/x/tools/cmd/cover
+- go get github.com/mattn/goveralls
+script:
+- '"$HOME/gopath/bin/goveralls" -show -service=travis-ci -repotoken "$COVERALLS_TOKEN"'
+env:
+  global:
+  - secure: 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
diff --git a/vendor/github.com/varlink/go/LICENSE b/vendor/github.com/varlink/go/LICENSE
new file mode 100644
index 000000000..261eeb9e9
--- /dev/null
+++ b/vendor/github.com/varlink/go/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
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+   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.
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+      the terms of any separate license agreement you may have executed
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+   6. Trademarks. This License does not grant permission to use the trade
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+   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
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+      incidental, or consequential damages of any character arising as a
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+      Work (including but not limited to damages for loss of goodwill,
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+      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.
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+   END OF TERMS AND CONDITIONS
+
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+   Unless required by applicable law or agreed to in writing, software
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+   limitations under the License.
diff --git a/vendor/github.com/varlink/go/Makefile b/vendor/github.com/varlink/go/Makefile
new file mode 100644
index 000000000..3f1c0e6d6
--- /dev/null
+++ b/vendor/github.com/varlink/go/Makefile
@@ -0,0 +1,3 @@
+all:
+	go test -v ./...
+.PHONY: all
diff --git a/vendor/github.com/varlink/go/README.md b/vendor/github.com/varlink/go/README.md
new file mode 100644
index 000000000..926a82bdd
--- /dev/null
+++ b/vendor/github.com/varlink/go/README.md
@@ -0,0 +1,7 @@
+[![Build Status](https://travis-ci.org/varlink/go.svg?branch=master)](https://travis-ci.org/varlink/go)
+[![Go Report Card](https://goreportcard.com/badge/github.com/varlink/go)](https://goreportcard.com/report/github.com/varlink/go)
+[![Go Doc](https://img.shields.io/badge/godoc-reference-blue.svg?style=flat-square)](http://godoc.org/github.com/varlink/go/varlink)
+[![Coverage Status](https://coveralls.io/repos/github/varlink/go/badge.svg?branch=master)](https://coveralls.io/github/varlink/go?branch=master)
+[![Release](https://img.shields.io/github/release/golang-standards/project-layout.svg?style=flat-square)](https://github.com/varlink/go/varlink/releases/latest)
+
+# go/varlink
diff --git a/vendor/github.com/varlink/go/cmd/varlink-go-interface-generator/generator_test.go b/vendor/github.com/varlink/go/cmd/varlink-go-interface-generator/generator_test.go
new file mode 100644
index 000000000..aa3a8565f
--- /dev/null
+++ b/vendor/github.com/varlink/go/cmd/varlink-go-interface-generator/generator_test.go
@@ -0,0 +1,85 @@
+package main
+
+import (
+	"strings"
+	"testing"
+)
+
+func expect(t *testing.T, expected string, returned string) {
+	if strings.Compare(returned, expected) != 0 {
+		t.Fatalf("Expected(%d): `%s`\nGot(%d): `%s`\n",
+			len(expected), expected,
+			len(returned), returned)
+	}
+}
+
+func TestIDLParser(t *testing.T) {
+	pkgname, b, err := generateTemplate(`
+# Interface to jump a spacecraft to another point in space. The 
+# FTL Drive is the propulsion system to achieve faster-than-light
+# travel through space. A ship making a properly calculated
+# jump can arrive safely in planetary orbit, or alongside other
+# ships or spaceborne objects.
+interface org.example.ftl
+
+# The current state of the FTL drive and the amount of fuel
+# available to jump.
+type DriveCondition (
+  state: (idle, spooling, busy),
+  booster: bool,
+  active_engines: [](id: int, state: bool),
+  tylium_level: int
+)
+
+# Speed, trajectory and jump duration is calculated prior to
+# activating the FTL drive.
+type DriveConfiguration (
+  speed: int,
+  trajectory: int,
+  duration: int
+)
+
+# The galactic coordinates use the Sun as the origin. Galactic
+# longitude is measured with primary direction from the Sun to
+# the center of the galaxy in the galactic plane, while the
+# galactic latitude measures the angle of the object above the
+# galactic plane.
+type Coordinate (
+  longitude: float,
+  latitude: float,
+  distance: int
+)
+
+# Monitor the drive. The method will reply with an update whenever
+# the drive's state changes
+method Monitor() -> (condition: DriveCondition)
+
+# Calculate the drive's jump parameters from the current
+# position to the target position in the galaxy
+method CalculateConfiguration(
+  current: Coordinate,
+  target: Coordinate
+) -> (configuration: DriveConfiguration)
+
+# Jump to the calculated point in space
+method Jump(configuration: DriveConfiguration) -> ()
+
+# There is not enough tylium to jump with the given parameters
+error NotEnoughEnergy ()
+
+# The supplied parameters are outside the supported range
+error ParameterOutOfRange (field: string)
+
+# some more coverage
+method Foo(interface: string) -> (ret: (go: string, switch: bool, more: (t:bool, f:bool)))
+	`)
+
+	if err != nil {
+		t.Fatalf("Error parsing %v", err)
+	}
+	expect(t, "orgexampleftl", pkgname)
+	if len(b) <= 0 {
+		t.Fatal("No generated go source")
+	}
+	// FIXME: compare b.String() against expected output
+}
diff --git a/vendor/github.com/varlink/go/cmd/varlink-go-interface-generator/main.go b/vendor/github.com/varlink/go/cmd/varlink-go-interface-generator/main.go
new file mode 100644
index 000000000..1bcdb78de
--- /dev/null
+++ b/vendor/github.com/varlink/go/cmd/varlink-go-interface-generator/main.go
@@ -0,0 +1,294 @@
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path"
+	"strings"
+
+	"github.com/varlink/go/varlink/idl"
+)
+
+var goKeywords = map[string]struct{}{
+	"break":       {},
+	"case":        {},
+	"chan":        {},
+	"const":       {},
+	"continue":    {},
+	"default":     {},
+	"defer":       {},
+	"else":        {},
+	"fallthrough": {},
+	"for":         {},
+	"func":        {},
+	"go":          {},
+	"goto":        {},
+	"if":          {},
+	"import":      {},
+	"interface":   {},
+	"map":         {},
+	"package":     {},
+	"range":       {},
+	"return":      {},
+	"select":      {},
+	"struct":      {},
+	"switch":      {},
+	"type":        {},
+	"var":         {},
+}
+
+func sanitizeGoName(name string) string {
+	if _, ok := goKeywords[name]; !ok {
+		return name
+	}
+	return name + "_"
+}
+
+func writeType(b *bytes.Buffer, t *idl.Type, json bool, ident int) {
+	switch t.Kind {
+	case idl.TypeBool:
+		b.WriteString("bool")
+
+	case idl.TypeInt:
+		b.WriteString("int64")
+
+	case idl.TypeFloat:
+		b.WriteString("float64")
+
+	case idl.TypeString, idl.TypeEnum:
+		b.WriteString("string")
+
+	case idl.TypeArray:
+		b.WriteString("[]")
+		writeType(b, t.ElementType, json, ident)
+
+	case idl.TypeMaybe:
+		b.WriteString("*")
+		writeType(b, t.ElementType, json, ident)
+
+	case idl.TypeAlias:
+		b.WriteString(t.Alias)
+
+	case idl.TypeStruct:
+		b.WriteString("struct{\n")
+		for _, field := range t.Fields {
+			for i := 0; i < ident+1; i++ {
+				b.WriteString("\t")
+			}
+
+			b.WriteString(strings.Title(field.Name) + " ")
+			writeType(b, field.Type, json, ident+1)
+			if json {
+				b.WriteString(" `json:\"" + field.Name + "\"`")
+			}
+			b.WriteString("\n")
+		}
+		for i := 0; i < ident; i++ {
+			b.WriteString("\t")
+		}
+		b.WriteString("}")
+	}
+}
+
+func generateTemplate(description string) (string, []byte, error) {
+	description = strings.TrimRight(description, "\n")
+
+	midl, err := idl.New(description)
+	if err != nil {
+		return "", nil, err
+	}
+
+	pkgname := strings.Replace(midl.Name, ".", "", -1)
+
+	var b bytes.Buffer
+	b.WriteString("// Generated with github.com/varlink/go/cmd/varlink-go-interface-generator\n")
+	b.WriteString("package " + pkgname + "\n\n")
+	b.WriteString(`import "github.com/varlink/go/varlink"` + "\n\n")
+
+	// Type declarations
+	for _, a := range midl.Aliases {
+		b.WriteString("type " + a.Name + " ")
+		writeType(&b, a.Type, true, 0)
+		b.WriteString("\n\n")
+	}
+
+	// Local interface with all methods
+	b.WriteString("type " + pkgname + "Interface interface {\n")
+	for _, m := range midl.Methods {
+		b.WriteString("\t" + m.Name + "(c VarlinkCall")
+		for _, field := range m.In.Fields {
+			b.WriteString(", " + strings.Title(field.Name) + " ")
+			writeType(&b, field.Type, false, 1)
+		}
+		b.WriteString(") error\n")
+	}
+	b.WriteString("}\n\n")
+
+	// Local object with all methods
+	b.WriteString("type VarlinkCall struct{ varlink.Call }\n\n")
+
+	// Reply methods for all varlink errors
+	for _, e := range midl.Errors {
+		b.WriteString("func (c *VarlinkCall) Reply" + e.Name + "(")
+		for i, field := range e.Type.Fields {
+			if i > 0 {
+				b.WriteString(", ")
+			}
+			b.WriteString(sanitizeGoName(field.Name) + " ")
+			writeType(&b, field.Type, false, 1)
+		}
+		b.WriteString(") error {\n")
+		if len(e.Type.Fields) > 0 {
+			b.WriteString("\tvar out ")
+			writeType(&b, e.Type, true, 1)
+			b.WriteString("\n")
+			for _, field := range e.Type.Fields {
+				switch field.Type.Kind {
+				case idl.TypeStruct, idl.TypeArray:
+					b.WriteString("\tout." + strings.Title(field.Name) + " = ")
+					writeType(&b, field.Type, true, 1)
+					b.WriteString("(" + sanitizeGoName(field.Name) + ")\n")
+
+				default:
+					b.WriteString("\tout." + strings.Title(field.Name) + " = " + sanitizeGoName(field.Name) + "\n")
+				}
+			}
+			b.WriteString("\treturn c.ReplyError(\"" + midl.Name + "." + e.Name + "\", &out)\n")
+		} else {
+			b.WriteString("\treturn c.ReplyError(\"" + midl.Name + "." + e.Name + "\", nil)\n")
+		}
+		b.WriteString("}\n\n")
+	}
+
+	// Reply methods for all varlink methods
+	for _, m := range midl.Methods {
+		b.WriteString("func (c *VarlinkCall) Reply" + m.Name + "(")
+		for i, field := range m.Out.Fields {
+			if i > 0 {
+				b.WriteString(", ")
+			}
+			b.WriteString(sanitizeGoName(field.Name) + " ")
+			writeType(&b, field.Type, false, 1)
+		}
+		b.WriteString(") error {\n")
+		if len(m.Out.Fields) > 0 {
+			b.WriteString("\tvar out ")
+			writeType(&b, m.Out, true, 1)
+			b.WriteString("\n")
+			for _, field := range m.Out.Fields {
+				switch field.Type.Kind {
+				case idl.TypeStruct, idl.TypeArray:
+					b.WriteString("\tout." + strings.Title(field.Name) + " = ")
+					writeType(&b, field.Type, true, 1)
+					b.WriteString("(" + sanitizeGoName(field.Name) + ")\n")
+
+				default:
+					b.WriteString("\tout." + strings.Title(field.Name) + " = " + sanitizeGoName(field.Name) + "\n")
+				}
+			}
+			b.WriteString("\treturn c.Reply(&out)\n")
+		} else {
+			b.WriteString("\treturn c.Reply(nil)\n")
+		}
+		b.WriteString("}\n\n")
+	}
+
+	// Dummy methods for all varlink methods
+	for _, m := range midl.Methods {
+		b.WriteString("func (s *VarlinkInterface) " + m.Name + "(c VarlinkCall")
+		for _, field := range m.In.Fields {
+			b.WriteString(", " + sanitizeGoName(field.Name) + " ")
+			writeType(&b, field.Type, false, 1)
+		}
+		b.WriteString(") error {\n" +
+			"\treturn c.ReplyMethodNotImplemented(\"" + m.Name + "\")\n" +
+			"}\n\n")
+	}
+
+	// Method call dispatcher
+	b.WriteString("func (s *VarlinkInterface) VarlinkDispatch(call varlink.Call, methodname string) error {\n" +
+		"\tswitch methodname {\n")
+	for _, m := range midl.Methods {
+		b.WriteString("\tcase \"" + m.Name + "\":\n")
+		if len(m.In.Fields) > 0 {
+			b.WriteString("\t\tvar in ")
+			writeType(&b, m.In, true, 2)
+			b.WriteString("\n")
+			b.WriteString("\t\terr := call.GetParameters(&in)\n" +
+				"\t\tif err != nil {\n" +
+				"\t\t\treturn call.ReplyInvalidParameter(\"parameters\")\n" +
+				"\t\t}\n")
+			b.WriteString("\t\treturn s." + pkgname + "Interface." + m.Name + "(VarlinkCall{call}")
+			if len(m.In.Fields) > 0 {
+				for _, field := range m.In.Fields {
+					switch field.Type.Kind {
+					case idl.TypeStruct, idl.TypeArray:
+						b.WriteString(", ")
+						writeType(&b, field.Type, false, 2)
+						b.WriteString("(in." + strings.Title(field.Name) + ")")
+
+					default:
+						b.WriteString(", in." + strings.Title(field.Name))
+					}
+				}
+			}
+			b.WriteString(")\n")
+		} else {
+			b.WriteString("\t\treturn s." + pkgname + "Interface." + m.Name + "(VarlinkCall{call})\n")
+		}
+		b.WriteString("\n")
+	}
+	b.WriteString("\tdefault:\n" +
+		"\t\treturn call.ReplyMethodNotFound(methodname)\n" +
+		"\t}\n" +
+		"}\n")
+
+	// Varlink interface name
+	b.WriteString("func (s *VarlinkInterface) VarlinkGetName() string {\n" +
+		"\treturn `" + midl.Name + "`\n" + "}\n\n")
+
+	// Varlink interface description
+	b.WriteString("func (s *VarlinkInterface) VarlinkGetDescription() string {\n" +
+		"\treturn `" + midl.Description + "\n`\n}\n\n")
+
+	b.WriteString("type VarlinkInterface struct {\n" +
+		"\t" + pkgname + "Interface\n" +
+		"}\n\n")
+
+	b.WriteString("func VarlinkNew(m " + pkgname + "Interface) *VarlinkInterface {\n" +
+		"\treturn &VarlinkInterface{m}\n" +
+		"}\n")
+
+	return pkgname, b.Bytes(), nil
+}
+
+func generateFile(varlinkFile string) {
+	file, err := ioutil.ReadFile(varlinkFile)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error reading file '%s': %s\n", varlinkFile, err)
+		os.Exit(1)
+	}
+
+	pkgname, b, err := generateTemplate(string(file))
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error parsing file '%s': %s\n", varlinkFile, err)
+		os.Exit(1)
+	}
+
+	filename := path.Dir(varlinkFile) + "/" + pkgname + ".go"
+	err = ioutil.WriteFile(filename, b, 0660)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error writing file '%s': %s\n", filename, err)
+		os.Exit(1)
+	}
+}
+
+func main() {
+	if len(os.Args) != 2 {
+		fmt.Printf("Usage: %s <file>\n", os.Args[0])
+		os.Exit(1)
+	}
+	generateFile(os.Args[1])
+}
diff --git a/vendor/github.com/varlink/go/cmd/varlink-go-type-generator/main.go b/vendor/github.com/varlink/go/cmd/varlink-go-type-generator/main.go
new file mode 100644
index 000000000..dfbec5fb2
--- /dev/null
+++ b/vendor/github.com/varlink/go/cmd/varlink-go-type-generator/main.go
@@ -0,0 +1,142 @@
+package main
+
+import (
+	"fmt"
+	"go/ast"
+	"go/importer"
+	"go/parser"
+	"go/token"
+	"go/types"
+	"log"
+	"os"
+)
+
+func GoToVarlinkType(t types.Type) string {
+	switch u := t.(type) {
+	case *types.Basic:
+		if u.Info()&types.IsBoolean != 0 {
+			return "bool"
+		}
+		if u.Info()&types.IsInteger != 0 {
+			return "int"
+		}
+		if u.Info()&types.IsFloat != 0 {
+			return "float"
+		}
+		if u.Info()&types.IsString != 0 {
+			return "string"
+		}
+		return fmt.Sprintf("<<<%s>>>", t.String())
+
+	case *types.Named:
+		return u.Obj().Name()
+
+	case *types.Map:
+		return fmt.Sprintf("<<<%s>>>", u.String())
+
+	case *types.Interface:
+		return fmt.Sprintf("<<<%s>>>", u.String())
+
+	case *types.Pointer:
+		return fmt.Sprintf("?%s", GoToVarlinkType(u.Elem()))
+
+	case *types.Array:
+		return fmt.Sprintf("[]%s", GoToVarlinkType(u.Elem()))
+
+	case *types.Slice:
+		return fmt.Sprintf("[]%s", GoToVarlinkType(u.Elem()))
+
+	default:
+		return fmt.Sprintf("<<<%T %s>>>", t, u)
+	}
+
+	return t.String()
+}
+
+func PrintDefsUses(name string, fset *token.FileSet, files []*ast.File) error {
+	conf := types.Config{
+		Importer:    importer.Default(),
+		FakeImportC: true,
+	}
+
+	info := &types.Info{
+		Defs: make(map[*ast.Ident]types.Object),
+	}
+
+	_, err := conf.Check(name, fset, files, info)
+	if err != nil {
+		return err // type error
+	}
+
+	seen := map[string]interface{}{}
+
+	for id, obj := range info.Defs {
+		if obj == nil {
+			continue
+		}
+
+		if _, ok := seen[id.Name]; ok {
+			continue
+		}
+
+		/*
+			if !obj.Exported() || obj.Pkg().Name() != name {
+				continue
+			}
+		*/
+		switch f := obj.Type().Underlying().(type) {
+		case *types.Struct:
+			if f.NumFields() > 0 {
+				fmt.Printf("type %s (\n", id.Name)
+				fmt.Printf("\t%s: %s",
+					f.Field(0).Name(), GoToVarlinkType(f.Field(0).Type()))
+				for i := 1; i < f.NumFields(); i++ {
+					fmt.Printf(",\n\t%s: %s",
+						f.Field(i).Name(), GoToVarlinkType(f.Field(i).Type()))
+				}
+				fmt.Printf("\n)\n\n")
+			}
+		}
+		seen[id.Name] = nil
+	}
+
+	return nil
+}
+
+func main() {
+
+	path := os.Args[1]
+	fs := token.NewFileSet()
+
+	if stat, err := os.Stat(path); err == nil && stat.IsDir() {
+		pkgs, err := parser.ParseDir(fs, path, nil, 0)
+		if err != nil {
+			fmt.Printf("parsing dir '%s': %s", path, err)
+		}
+		for name, pkg := range pkgs {
+			log.Println("Found package:", name)
+
+			fset := make([]*ast.File, len(pkg.Files), len(pkg.Files))
+			idx := 0
+			for _, value := range pkg.Files {
+				fset[idx] = value
+				idx++
+			}
+
+			if err := PrintDefsUses(name, fs, fset); err != nil {
+				log.Print(err) // type error
+			}
+		}
+	} else {
+
+		fset, err := parser.ParseFile(fs, path, nil, 0)
+
+		if err != nil {
+			fmt.Printf("parsing file '%s': %s", path, err)
+		}
+		name := fset.Name.String()
+		if err := PrintDefsUses(name, fs, []*ast.File{fset}); err != nil {
+			log.Print(err) // type error
+		}
+	}
+}
diff --git a/vendor/github.com/varlink/go/golang-github-varlink-go.spec b/vendor/github.com/varlink/go/golang-github-varlink-go.spec
new file mode 100644
index 000000000..85f5d1788
--- /dev/null
+++ b/vendor/github.com/varlink/go/golang-github-varlink-go.spec
@@ -0,0 +1,44 @@
+%global goipath github.com/varlink/go
+Version:        0
+%gometa
+
+Name:           %{goname}
+Release:        1%{?dist}
+Summary:        Go bindings for varlink
+License:        ASL 2.0
+URL:            %{gourl}
+Source0:        %{gosource}
+
+%description
+Native Go bindings for the varlink protocol.
+
+%package devel
+Summary:       %{summary}
+BuildArch:     noarch
+
+%description devel
+%{summary}
+
+This package contains library source intended for
+building other packages which use import path with
+%{gobaseipath} prefix.
+
+%prep
+%forgesetup
+
+%build
+%gobuildroot
+
+%install
+gofiles=$(find . %{gofindfilter} -print)
+%goinstall $gofiles
+
+%check
+
+%files devel -f devel.file-list
+%license LICENSE
+%doc README.md
+
+%changelog
+* Tue Mar 20 2018 <info@varlink.org> 0-1
+- Version 0
diff --git a/vendor/github.com/varlink/go/varlink/call.go b/vendor/github.com/varlink/go/varlink/call.go
new file mode 100644
index 000000000..c5d7cf7fd
--- /dev/null
+++ b/vendor/github.com/varlink/go/varlink/call.go
@@ -0,0 +1,86 @@
+package varlink
+
+import (
+	"bufio"
+	"encoding/json"
+	"fmt"
+	"strings"
+)
+
+// Call is a method call retrieved by a Service. The connection from the
+// client can be terminated by returning an error from the call instead
+// of sending a reply or error reply.
+type Call struct {
+	writer    *bufio.Writer
+	in        *serviceCall
+	Continues bool
+}
+
+// WantsMore indicates if the calling client accepts more than one reply to this method call.
+func (c *Call) WantsMore() bool {
+	return c.in.More
+}
+
+// IsOneShot indicate that the calling client does not expect a reply.
+func (c *Call) IsOneShot() bool {
+	return c.in.OneShot
+}
+
+// GetParameters retrieves the method call parameters.
+func (c *Call) GetParameters(p interface{}) error {
+	if c.in.Parameters == nil {
+		return fmt.Errorf("empty parameters")
+	}
+	return json.Unmarshal(*c.in.Parameters, p)
+}
+
+func (c *Call) sendMessage(r *serviceReply) error {
+	if c.in.OneShot {
+		return nil
+	}
+
+	b, e := json.Marshal(r)
+	if e != nil {
+		return e
+	}
+
+	b = append(b, 0)
+	_, e = c.writer.Write(b)
+	if e != nil {
+		return e
+	}
+	return c.writer.Flush()
+}
+
+// Reply sends a reply to this method call.
+func (c *Call) Reply(parameters interface{}) error {
+	if !c.Continues {
+		return c.sendMessage(&serviceReply{
+			Parameters: parameters,
+		})
+	}
+
+	if !c.in.More {
+		return fmt.Errorf("call did not set more, it does not expect continues")
+	}
+
+	return c.sendMessage(&serviceReply{
+		Continues:  true,
+		Parameters: parameters,
+	})
+}
+
+// ReplyError sends an error reply to this method call.
+func (c *Call) ReplyError(name string, parameters interface{}) error {
+	r := strings.LastIndex(name, ".")
+	if r <= 0 {
+		return fmt.Errorf("invalid error name")
+	}
+	if name[:r] == "org.varlink.service" {
+		return fmt.Errorf("refused to send org.varlink.service errors")
+	}
+	return c.sendMessage(&serviceReply{
+		Error:      name,
+		Parameters: parameters,
+	})
+}
diff --git a/vendor/github.com/varlink/go/varlink/connection.go b/vendor/github.com/varlink/go/varlink/connection.go
new file mode 100644
index 000000000..2445072b6
--- /dev/null
+++ b/vendor/github.com/varlink/go/varlink/connection.go
@@ -0,0 +1,197 @@
+package varlink
+
+import (
+	"bufio"
+	"encoding/json"
+	"net"
+	"strings"
+)
+
+// Error is a varlink error returned from a method call.
+type Error struct {
+	Name       string
+	Parameters interface{}
+}
+
+// Error returns the fully-qualified varlink error name.
+func (e *Error) Error() string {
+	return e.Name
+}
+
+// Connection is a connection from a client to a service.
+type Connection struct {
+	address string
+	conn    net.Conn
+	reader  *bufio.Reader
+	writer  *bufio.Writer
+}
+
+// Send sends a method call.
+func (c *Connection) Send(method string, parameters interface{}, more bool) error {
+	type call struct {
+		Method     string      `json:"method"`
+		Parameters interface{} `json:"parameters,omitempty"`
+		More       bool        `json:"more,omitempty"`
+		OneShot    bool        `json:"oneshot,omitempty"`
+	}
+	m := call{
+		Method:     method,
+		Parameters: parameters,
+		More:       more,
+	}
+	b, err := json.Marshal(m)
+	if err != nil {
+		return err
+	}
+
+	b = append(b, 0)
+	_, err = c.writer.Write(b)
+	if err != nil {
+		return err
+	}
+
+	return c.writer.Flush()
+}
+
+// Receive receives a method reply.
+func (c *Connection) Receive(parameters interface{}, continues *bool, oneshot *bool) error {
+	type reply struct {
+		Parameters *json.RawMessage `json:"parameters"`
+		Continues  bool             `json:"continues"`
+		Oneshot    bool             `json:"oneshot"`
+		Error      string           `json:"error"`
+	}
+
+	out, err := c.reader.ReadBytes('\x00')
+	if err != nil {
+		return err
+	}
+
+	var m reply
+	err = json.Unmarshal(out[:len(out)-1], &m)
+	if err != nil {
+		return err
+	}
+
+	if m.Error != "" {
+		return &Error{
+			Name:       m.Error,
+			Parameters: m.Parameters,
+		}
+	}
+
+	if continues != nil {
+		*continues = m.Continues
+	}
+	if oneshot != nil {
+		*oneshot = m.Oneshot
+	}
+	if parameters != nil && m.Parameters != nil {
+		return json.Unmarshal(*m.Parameters, parameters)
+	}
+
+	return nil
+}
+
+// Call sends a method call and returns the result of the call.
+func (c *Connection) Call(method string, parameters interface{}, result interface{}) error {
+	err := c.Send(method, &parameters, false)
+	if err != nil {
+		return err
+	}
+
+	return c.Receive(result, nil, nil)
+}
+
+// GetInterfaceDescription requests the interface description string from the service.
+func (c *Connection) GetInterfaceDescription(name string) (string, error) {
+	type request struct {
+		Interface string `json:"interface"`
+	}
+	type reply struct {
+		Description string `json:"description"`
+	}
+
+	var r reply
+	err := c.Call("org.varlink.service.GetInterfaceDescription", request{Interface: name}, &r)
+	if err != nil {
+		return "", err
+	}
+
+	return r.Description, nil
+}
+
+// GetInfo requests information about the service.
+func (c *Connection) GetInfo(vendor *string, product *string, version *string, url *string, interfaces *[]string) error {
+	type reply struct {
+		Vendor     string   `json:"vendor"`
+		Product    string   `json:"product"`
+		Version    string   `json:"version"`
+		URL        string   `json:"url"`
+		Interfaces []string `json:"interfaces"`
+	}
+
+	var r reply
+	err := c.Call("org.varlink.service.GetInfo", nil, &r)
+	if err != nil {
+		return err
+	}
+
+	if vendor != nil {
+		*vendor = r.Vendor
+	}
+	if product != nil {
+		*product = r.Product
+	}
+	if version != nil {
+		*version = r.Version
+	}
+	if url != nil {
+		*url = r.URL
+	}
+	if interfaces != nil {
+		*interfaces = r.Interfaces
+	}
+
+	return nil
+}
+
+// Close terminates the connection.
+func (c *Connection) Close() error {
+	return c.conn.Close()
+}
+
+// NewConnection returns a new connection to the given address.
+func NewConnection(address string) (*Connection, error) {
+	var err error
+
+	words := strings.SplitN(address, ":", 2)
+	protocol := words[0]
+	addr := words[1]
+
+	// Ignore parameters after ';'
+	words = strings.SplitN(addr, ";", 2)
+	if words != nil {
+		addr = words[0]
+	}
+
+	switch protocol {
+	case "unix":
+		break
+
+	case "tcp":
+		break
+	}
+
+	c := Connection{}
+	c.conn, err = net.Dial(protocol, addr)
+	if err != nil {
+		return nil, err
+	}
+
+	c.address = address
+	c.reader = bufio.NewReader(c.conn)
+	c.writer = bufio.NewWriter(c.conn)
+
+	return &c, nil
+}
diff --git a/vendor/github.com/varlink/go/varlink/doc.go b/vendor/github.com/varlink/go/varlink/doc.go
new file mode 100644
index 000000000..de1ed2380
--- /dev/null
+++ b/vendor/github.com/varlink/go/varlink/doc.go
@@ -0,0 +1,63 @@
+/*
+Package varlink provides varlink client and server implementations. See http://varlink.org
+for more information about varlink.
+
+Example varlink interface definition in a org.example.this.varlink file:
+	interface org.example.this
+
+	method Ping(in: string) -> (out: string)
+
+Generated Go module in a orgexamplethis/orgexamplethis.go file. The generated module
+provides reply methods for all methods specified in the varlink interface description.
+The stub implementations return a MethodNotImplemented error; the service implementation
+using this module will override the methods with its own implementation.
+	// Generated with github.com/varlink/go/cmd/varlink-go-interface-generator
+	package orgexamplethis
+
+	import "github.com/varlink/go/varlink"
+
+	type orgexamplethisInterface interface {
+		Ping(c VarlinkCall, in string) error
+	}
+
+	type VarlinkCall struct{ varlink.Call }
+
+	func (c *VarlinkCall) ReplyPing(out string) error {
+		var out struct {
+			Out string `json:"out,omitempty"`
+		}
+		out.Out = out
+		return c.Reply(&out)
+	}
+
+	func (s *VarlinkInterface) Ping(c VarlinkCall, in string) error {
+		return c.ReplyMethodNotImplemented("Ping")
+	}
+
+	[...]
+
+Service implementing the interface and its method:
+	import ("orgexamplethis")
+
+	type Data struct {
+		orgexamplethis.VarlinkInterface
+		data string
+	}
+
+	data := Data{data: "test"}
+
+	func (d *Data) Ping(call orgexamplethis.VarlinkCall, ping string) error {
+		return call.ReplyPing(ping)
+	}
+
+	service, _ = varlink.NewService(
+	        "Example",
+	        "This",
+	        "1",
+	         "https://example.org/this",
+	)
+
+	service.RegisterInterface(orgexamplethis.VarlinkNew(&data))
+	err := service.Listen("unix:/run/org.example.this", 0)
+*/
+package varlink
diff --git a/vendor/github.com/varlink/go/varlink/external_test.go b/vendor/github.com/varlink/go/varlink/external_test.go
new file mode 100644
index 000000000..dbe4290e6
--- /dev/null
+++ b/vendor/github.com/varlink/go/varlink/external_test.go
@@ -0,0 +1,144 @@
+package varlink_test
+
+// test with no internal access
+
+import (
+	"github.com/varlink/go/varlink"
+	"os"
+	"testing"
+	"time"
+)
+
+type VarlinkInterface struct{}
+
+func (s *VarlinkInterface) VarlinkDispatch(call varlink.Call, methodname string) error {
+	return call.ReplyMethodNotImplemented(methodname)
+}
+func (s *VarlinkInterface) VarlinkGetName() string {
+	return `org.example.test`
+}
+
+func (s *VarlinkInterface) VarlinkGetDescription() string {
+	return "#"
+}
+
+type VarlinkInterface2 struct{}
+
+func (s *VarlinkInterface2) VarlinkDispatch(call varlink.Call, methodname string) error {
+	return call.ReplyMethodNotImplemented(methodname)
+}
+func (s *VarlinkInterface2) VarlinkGetName() string {
+	return `org.example.test2`
+}
+
+func (s *VarlinkInterface2) VarlinkGetDescription() string {
+	return "#"
+}
+
+func TestRegisterService(t *testing.T) {
+	newTestInterface := new(VarlinkInterface)
+	service, err := varlink.NewService(
+		"Varlink",
+		"Varlink Test",
+		"1",
+		"https://github.com/varlink/go/varlink",
+	)
+	if err != nil {
+		t.Fatalf("NewService(): %v", err)
+	}
+
+	if err := service.RegisterInterface(newTestInterface); err != nil {
+		t.Fatalf("Couldn't register service: %v", err)
+	}
+
+	if err := service.RegisterInterface(newTestInterface); err == nil {
+		t.Fatal("Could register service twice")
+	}
+
+	defer func() { service.Shutdown() }()
+
+	servererror := make(chan error)
+
+	go func() {
+		servererror <- service.Listen("unix:@varlinkexternal_TestRegisterService", 0)
+	}()
+
+	time.Sleep(time.Second / 5)
+
+	n := new(VarlinkInterface2)
+
+	if err := service.RegisterInterface(n); err == nil {
+		t.Fatal("Could register service while running")
+	}
+	time.Sleep(time.Second / 5)
+	service.Shutdown()
+
+	if err := <-servererror; err != nil {
+		t.Fatalf("service.Listen(): %v", err)
+	}
+}
+
+func TestUnix(t *testing.T) {
+	newTestInterface := new(VarlinkInterface)
+	service, err := varlink.NewService(
+		"Varlink",
+		"Varlink Test",
+		"1",
+		"https://github.com/varlink/go/varlink",
+	)
+
+	if err != nil {
+		t.Fatalf("NewService(): %v", err)
+	}
+
+	if err := service.RegisterInterface(newTestInterface); err != nil {
+		t.Fatalf("RegisterInterface(): %v", err)
+	}
+
+	servererror := make(chan error)
+
+	go func() {
+		servererror <- service.Listen("unix:varlinkexternal_TestUnix", 0)
+	}()
+
+	time.Sleep(time.Second / 5)
+	service.Shutdown()
+
+	if err := <-servererror; err != nil {
+		t.Fatalf("service.Listen(): %v", err)
+	}
+}
+
+func TestListenFDSNotInt(t *testing.T) {
+	newTestInterface := new(VarlinkInterface)
+	service, err := varlink.NewService(
+		"Varlink",
+		"Varlink Test",
+		"1",
+		"https://github.com/varlink/go/varlink",
+	)
+
+	if err != nil {
+		t.Fatalf("NewService(): %v", err)
+	}
+
+	if err := service.RegisterInterface(newTestInterface); err != nil {
+		t.Fatalf("Couldn't register service: %v", err)
+	}
+	os.Setenv("LISTEN_FDS", "foo")
+
+	servererror := make(chan error)
+
+	go func() {
+		servererror <- service.Listen("unix:varlinkexternal_TestListenFDSNotInt", 0)
+	}()
+
+	time.Sleep(time.Second / 5)
+	service.Shutdown()
+
+	err = <-servererror
+
+	if err != nil {
+		t.Fatalf("service.Run(): %v", err)
+	}
+}
diff --git a/vendor/github.com/varlink/go/varlink/idl/idl.go b/vendor/github.com/varlink/go/varlink/idl/idl.go
new file mode 100644
index 000000000..27f21a759
--- /dev/null
+++ b/vendor/github.com/varlink/go/varlink/idl/idl.go
@@ -0,0 +1,465 @@
+// Package idl provides a varlink interface description parser.
+package idl
+
+import (
+	"bytes"
+	"fmt"
+	"regexp"
+)
+
+// Valid TypeKind values.
+const (
+	TypeBool = iota
+	TypeInt
+	TypeFloat
+	TypeString
+	TypeArray
+	TypeMaybe
+	TypeStruct
+	TypeEnum
+	TypeAlias
+)
+
+// TypeKind specifies the type of an Type.
+type TypeKind uint
+
+// Type represents a varlink type. Types are method input and output parameters,
+// error output parameters, or custom defined types in the interface description.
+type Type struct {
+	Kind        TypeKind
+	ElementType *Type
+	Alias       string
+	Fields      []TypeField
+}
+
+// TypeField is a named member of a TypeStruct.
+type TypeField struct {
+	Name string
+	Type *Type
+}
+
+// Alias represents a named Type in the interface description.
+type Alias struct {
+	Name string
+	Doc  string
+	Type *Type
+}
+
+// Method represents a method defined in the interface description.
+type Method struct {
+	Name string
+	Doc  string
+	In   *Type
+	Out  *Type
+}
+
+// Error represents an error defined in the interface description.
+type Error struct {
+	Name string
+	Type *Type
+}
+
+// IDL represents a parsed varlink interface description with types, methods, errors and
+// documentation.
+type IDL struct {
+	Name        string
+	Doc         string
+	Description string
+	Members     []interface{}
+	Aliases     map[string]*Alias
+	Methods     map[string]*Method
+	Errors      map[string]*Error
+}
+
+type parser struct {
+	input       string
+	position    int
+	lineStart   int
+	lastComment bytes.Buffer
+}
+
+func (p *parser) next() int {
+	r := -1
+
+	if p.position < len(p.input) {
+		r = int(p.input[p.position])
+	}
+
+	p.position++
+	return r
+}
+
+func (p *parser) backup() {
+	p.position--
+}
+
+func (p *parser) advance() bool {
+	for {
+		char := p.next()
+
+		if char == '\n' {
+			p.lineStart = p.position
+			p.lastComment.Reset()
+
+		} else if char == ' ' || char == '\t' {
+			// ignore
+
+		} else if char == '#' {
+			p.next()
+			start := p.position
+			for {
+				c := p.next()
+				if c < 0 || c == '\n' {
+					p.backup()
+					break
+				}
+			}
+			if p.lastComment.Len() > 0 {
+				p.lastComment.WriteByte('\n')
+			}
+			p.lastComment.WriteString(p.input[start:p.position])
+			p.next()
+
+		} else {
+			p.backup()
+			break
+		}
+	}
+
+	return p.position < len(p.input)
+}
+
+func (p *parser) advanceOnLine() {
+	for {
+		char := p.next()
+		if char != ' ' {
+			p.backup()
+			return
+		}
+	}
+}
+
+func (p *parser) readKeyword() string {
+	start := p.position
+
+	for {
+		char := p.next()
+		if char < 'a' || char > 'z' {
+			p.backup()
+			break
+		}
+	}
+
+	return p.input[start:p.position]
+}
+
+func (p *parser) readInterfaceName() string {
+	start := p.position
+	dnrx := regexp.MustCompile(`^[a-z]+(\.[a-z0-9]+([-][a-z0-9]+)*)+`)
+	name := dnrx.FindString(p.input[start:])
+	if name != "" {
+		if len(name) > 255 {
+			return ""
+		}
+		p.position += len(name)
+		return name
+	}
+	xdnrx := regexp.MustCompile(`^xn--[a-z0-9]+(\.[a-z0-9]+([-][a-z0-9]+)*)+`)
+	name = xdnrx.FindString(p.input[start:])
+	if name != "" {
+		if len(name) > 255 {
+			return ""
+		}
+		p.position += len(name)
+		return name
+	}
+	return ""
+}
+
+func (p *parser) readFieldName() string {
+	start := p.position
+
+	char := p.next()
+	if char < 'a' || char > 'z' {
+		p.backup()
+		return ""
+	}
+
+	for {
+		char := p.next()
+		if (char < 'A' || char > 'Z') && (char < 'a' || char > 'z') && (char < '0' || char > '9') && char != '_' {
+			p.backup()
+			break
+		}
+	}
+
+	return p.input[start:p.position]
+}
+
+func (p *parser) readTypeName() string {
+	start := p.position
+
+	for {
+		char := p.next()
+		if (char < 'A' || char > 'Z') && (char < 'a' || char > 'z') && (char < '0' || char > '9') {
+			p.backup()
+			break
+		}
+	}
+
+	return p.input[start:p.position]
+}
+
+func (p *parser) readStructType() *Type {
+	if p.next() != '(' {
+		p.backup()
+		return nil
+	}
+
+	t := &Type{Kind: TypeStruct}
+	t.Fields = make([]TypeField, 0)
+
+	char := p.next()
+	if char != ')' {
+		p.backup()
+
+		for {
+			field := TypeField{}
+
+			p.advance()
+			field.Name = p.readFieldName()
+			if field.Name == "" {
+				return nil
+			}
+
+			p.advance()
+
+			// Enums have no types, they are just a list of names
+			if p.next() == ':' {
+				if t.Kind == TypeEnum {
+					return nil
+				}
+
+				p.advance()
+				field.Type = p.readType()
+				if field.Type == nil {
+					return nil
+				}
+
+			} else {
+				t.Kind = TypeEnum
+				p.backup()
+			}
+
+			t.Fields = append(t.Fields, field)
+
+			p.advance()
+			char = p.next()
+			if char != ',' {
+				break
+			}
+		}
+
+		if char != ')' {
+			return nil
+		}
+	}
+
+	return t
+}
+
+func (p *parser) readType() *Type {
+	var t *Type
+
+	switch p.next() {
+	case '?':
+		e := p.readType()
+		if e == nil {
+			return nil
+		}
+		t = &Type{Kind: TypeMaybe, ElementType: e}
+
+	case '[':
+		if p.next() != ']' {
+			return nil
+		}
+		e := p.readType()
+		if e == nil {
+			return nil
+		}
+		t = &Type{Kind: TypeArray, ElementType: e}
+
+	default:
+		p.backup()
+		if keyword := p.readKeyword(); keyword != "" {
+			switch keyword {
+			case "bool":
+				t = &Type{Kind: TypeBool}
+
+			case "int":
+				t = &Type{Kind: TypeInt}
+
+			case "float":
+				t = &Type{Kind: TypeFloat}
+
+			case "string":
+				t = &Type{Kind: TypeString}
+			}
+
+		} else if name := p.readTypeName(); name != "" {
+			t = &Type{Kind: TypeAlias, Alias: name}
+
+		} else if t = p.readStructType(); t == nil {
+			return nil
+		}
+	}
+
+	return t
+}
+
+func (p *parser) readAlias(idl *IDL) (*Alias, error) {
+	a := &Alias{}
+
+	p.advance()
+	a.Doc = p.lastComment.String()
+	a.Name = p.readTypeName()
+	if a.Name == "" {
+		return nil, fmt.Errorf("missing type name")
+	}
+
+	p.advance()
+	a.Type = p.readType()
+	if a.Type == nil {
+		return nil, fmt.Errorf("missing type declaration")
+	}
+
+	return a, nil
+}
+
+func (p *parser) readMethod(idl *IDL) (*Method, error) {
+	m := &Method{}
+
+	p.advance()
+	m.Doc = p.lastComment.String()
+	m.Name = p.readTypeName()
+	if m.Name == "" {
+		return nil, fmt.Errorf("missing method type")
+	}
+
+	p.advance()
+	m.In = p.readType()
+	if m.In == nil {
+		return nil, fmt.Errorf("missing method input")
+	}
+
+	p.advance()
+	one := p.next()
+	two := p.next()
+	if (one != '-') || two != '>' {
+		return nil, fmt.Errorf("missing method '->' operator")
+	}
+
+	p.advance()
+	m.Out = p.readType()
+	if m.Out == nil {
+		return nil, fmt.Errorf("missing method output")
+	}
+
+	return m, nil
+}
+
+func (p *parser) readError(idl *IDL) (*Error, error) {
+	e := &Error{}
+
+	p.advance()
+	e.Name = p.readTypeName()
+	if e.Name == "" {
+		return nil, fmt.Errorf("missing error name")
+	}
+
+	p.advanceOnLine()
+	e.Type = p.readType()
+
+	return e, nil
+}
+
+func (p *parser) readIDL() (*IDL, error) {
+	if keyword := p.readKeyword(); keyword != "interface" {
+		return nil, fmt.Errorf("missing interface keyword")
+	}
+
+	idl := &IDL{
+		Members: make([]interface{}, 0),
+		Aliases: make(map[string]*Alias),
+		Methods: make(map[string]*Method),
+		Errors:  make(map[string]*Error),
+	}
+
+	p.advance()
+	idl.Doc = p.lastComment.String()
+	idl.Name = p.readInterfaceName()
+	if idl.Name == "" {
+		return nil, fmt.Errorf("interface name")
+	}
+
+	for {
+		if !p.advance() {
+			break
+		}
+
+		switch keyword := p.readKeyword(); keyword {
+		case "type":
+			a, err := p.readAlias(idl)
+			if err != nil {
+				return nil, err
+			}
+
+			idl.Members = append(idl.Members, a)
+			idl.Aliases[a.Name] = a
+
+		case "method":
+			m, err := p.readMethod(idl)
+			if err != nil {
+				return nil, err
+			}
+
+			idl.Members = append(idl.Members, m)
+			if _, ok := idl.Methods[m.Name]; ok {
+				return nil, fmt.Errorf("method `%s` already defined", m.Name)
+			}
+			idl.Methods[m.Name] = m
+
+		case "error":
+			e, err := p.readError(idl)
+			if err != nil {
+				return nil, err
+			}
+
+			idl.Members = append(idl.Members, e)
+			idl.Errors[e.Name] = e
+
+		default:
+			return nil, fmt.Errorf("unknown keyword '%s'", keyword)
+		}
+	}
+
+	return idl, nil
+}
+
+// New parses a varlink interface description.
+func New(description string) (*IDL, error) {
+	p := &parser{input: description}
+
+	p.advance()
+	idl, err := p.readIDL()
+	if err != nil {
+		return nil, err
+	}
+
+	if len(idl.Methods) == 0 {
+		return nil, fmt.Errorf("no methods defined")
+	}
+
+	idl.Description = description
+	return idl, nil
+}
diff --git a/vendor/github.com/varlink/go/varlink/idl/idl_test.go b/vendor/github.com/varlink/go/varlink/idl/idl_test.go
new file mode 100644
index 000000000..5d83d5890
--- /dev/null
+++ b/vendor/github.com/varlink/go/varlink/idl/idl_test.go
@@ -0,0 +1,127 @@
+package idl
+
+import (
+	"fmt"
+	"runtime"
+	"testing"
+)
+
+/*
+func expect(t *testing.T, expected string, returned string) {
+	if strings.Compare(returned, expected) != 0 {
+		t.Fatalf("Expected(%d): `%s`\nGot(%d): `%s`\n",
+			len(expected), expected,
+			len(returned), returned)
+	}
+}
+*/
+
+func testParse(t *testing.T, pass bool, description string) {
+	_, _, line, _ := runtime.Caller(1)
+
+	t.Run(fmt.Sprintf("Line-%d", line), func(t *testing.T) {
+		midl, err := New(description)
+		if pass {
+			if err != nil {
+				t.Fatalf("generateTemplate(`%s`): %v", description, err)
+			}
+			if len(midl.Name) <= 0 {
+				t.Fatalf("generateTemplate(`%s`): returned no pkgname", description)
+			}
+		}
+		if !pass && (err == nil) {
+			t.Fatalf("generateTemplate(`%s`): did not fail", description)
+		}
+	})
+}
+
+func TestOneMethod(t *testing.T) {
+	testParse(t, true, "interface foo.bar\nmethod Foo()->()")
+}
+
+func TestOneMethodNoType(t *testing.T) {
+	testParse(t, false, "interface foo.bar\nmethod Foo()->(b:)")
+}
+
+func TestDomainNames(t *testing.T) {
+	testParse(t, true, "interface org.varlink.service\nmethod F()->()")
+	testParse(t, true, "interface com.example.0example\nmethod F()->()")
+	testParse(t, true, "interface com.example.example-dash\nmethod F()->()")
+	testParse(t, true, "interface xn--lgbbat1ad8j.example.algeria\nmethod F()->()")
+	testParse(t, false, "interface com.-example.leadinghyphen\nmethod F()->()")
+	testParse(t, false, "interface com.example-.danglinghyphen-\nmethod F()->()")
+	testParse(t, false, "interface Com.example.uppercase-toplevel\nmethod F()->()")
+	testParse(t, false, "interface Co9.example.number-toplevel\nmethod F()->()")
+	testParse(t, false, "interface 1om.example.number-toplevel\nmethod F()->()")
+	testParse(t, false, "interface com.Example\nmethod F()->()")
+	var name string
+	for i := 0; i < 255; i++ {
+		name += "a"
+	}
+	testParse(t, false, "interface com.example.toolong"+name+"\nmethod F()->()")
+	testParse(t, false, "interface xn--example.toolong"+name+"\nmethod F()->()")
+}
+
+func TestNoMethod(t *testing.T) {
+	testParse(t, false, `
+interface org.varlink.service
+  type Interface (name: string, types: []Type, methods: []Method)
+  type Property (key: string, value: string)
+`)
+}
+
+func TestTypeNoArgs(t *testing.T) {
+	testParse(t, true, "interface foo.bar\n type I ()\nmethod F()->()")
+}
+
+func TestTypeOneArg(t *testing.T) {
+	testParse(t, true, "interface foo.bar\n type I (b:bool)\nmethod F()->()")
+}
+
+func TestTypeOneArray(t *testing.T) {
+	testParse(t, true, "interface foo.bar\n type I (b:[]bool)\nmethod  F()->()")
+	testParse(t, false, "interface foo.bar\n type I (b:bool[ ])\nmethod  F()->()")
+	testParse(t, false, "interface foo.bar\n type I (b:bool[1])\nmethod  F()->()")
+	testParse(t, false, "interface foo.bar\n type I (b:bool[ 1 ])\nmethod  F()->()")
+	testParse(t, false, "interface foo.bar\n type I (b:bool[ 1 1 ])\nmethod  F()->()")
+}
+
+func TestFieldnames(t *testing.T) {
+	testParse(t, false, "interface foo.bar\n type I (Test:[]bool)\nmethod  F()->()")
+	testParse(t, false, "interface foo.bar\n type I (_test:[]bool)\nmethod  F()->()")
+	testParse(t, false, "interface foo.bar\n type I (Äest:[]bool)\nmethod  F()->()")
+}
+func TestNestedStructs(t *testing.T) {
+	testParse(t, true, "interface foo.bar\n type I ( b: [](foo: bool, bar: bool, baz: int) )\nmethod  F()->()")
+}
+
+func TestEnum(t *testing.T) {
+	testParse(t, true, "interface foo.bar\n type I (b:(foo, bar, baz))\nmethod  F()->()")
+	testParse(t, false, "interface foo.bar\n type I (foo, bar, baz : bool)\nmethod  F()->()")
+}
+
+func TestIncomplete(t *testing.T) {
+	testParse(t, false, "interfacef foo.bar\nmethod  F()->()")
+	testParse(t, false, "interface foo.bar\nmethod  F()->()\ntype I (b: bool")
+	testParse(t, false, "interface foo.bar\nmethod  F()->(")
+	testParse(t, false, "interface foo.bar\nmethod  F(")
+	testParse(t, false, "interface foo.bar\nmethod  ()->()")
+	testParse(t, false, "interface foo.bar\nmethod  F->()\n")
+	testParse(t, false, "interface foo.bar\nmethod  F()->\n")
+	testParse(t, false, "interface foo.bar\nmethod  F()>()\n")
+	testParse(t, false, "interface foo.bar\nmethod  F()->()\ntype (b: bool)")
+	testParse(t, false, "interface foo.bar\nmethod  F()->()\nerror (b: bool)")
+	testParse(t, false, "interface foo.bar\nmethod  F()->()\n dfghdrg")
+}
+
+func TestDuplicate(t *testing.T) {
+	testParse(t, false, `
+interface foo.example
+	type Device()
+	type Device()
+	type T()
+	type T()
+	method F() -> ()
+	method F() -> ()
+`)
+}
diff --git a/vendor/github.com/varlink/go/varlink/orgvarlinkservice.go b/vendor/github.com/varlink/go/varlink/orgvarlinkservice.go
new file mode 100644
index 000000000..39f843c31
--- /dev/null
+++ b/vendor/github.com/varlink/go/varlink/orgvarlinkservice.go
@@ -0,0 +1,133 @@
+package varlink
+
+func doReplyError(c *Call, name string, parameters interface{}) error {
+	return c.sendMessage(&serviceReply{
+		Error:      name,
+		Parameters: parameters,
+	})
+}
+
+// ReplyInterfaceNotFound sends a org.varlink.service errror reply to this method call
+func (c *Call) ReplyInterfaceNotFound(interfaceA string) error {
+	var out struct {
+		Interface string `json:"interface,omitempty"`
+	}
+	out.Interface = interfaceA
+	return doReplyError(c, "org.varlink.service.InterfaceNotFound", &out)
+}
+
+// ReplyMethodNotFound sends a org.varlink.service errror reply to this method call
+func (c *Call) ReplyMethodNotFound(method string) error {
+	var out struct {
+		Method string `json:"method,omitempty"`
+	}
+	out.Method = method
+	return doReplyError(c, "org.varlink.service.MethodNotFound", &out)
+}
+
+// ReplyMethodNotImplemented sends a org.varlink.service errror reply to this method call
+func (c *Call) ReplyMethodNotImplemented(method string) error {
+	var out struct {
+		Method string `json:"method,omitempty"`
+	}
+	out.Method = method
+	return doReplyError(c, "org.varlink.service.MethodNotImplemented", &out)
+}
+
+// ReplyInvalidParameter sends a org.varlink.service errror reply to this method call
+func (c *Call) ReplyInvalidParameter(parameter string) error {
+	var out struct {
+		Parameter string `json:"parameter,omitempty"`
+	}
+	out.Parameter = parameter
+	return doReplyError(c, "org.varlink.service.InvalidParameter", &out)
+}
+
+func (c *Call) replyGetInfo(vendor string, product string, version string, url string, interfaces []string) error {
+	var out struct {
+		Vendor     string   `json:"vendor,omitempty"`
+		Product    string   `json:"product,omitempty"`
+		Version    string   `json:"version,omitempty"`
+		URL        string   `json:"url,omitempty"`
+		Interfaces []string `json:"interfaces,omitempty"`
+	}
+	out.Vendor = vendor
+	out.Product = product
+	out.Version = version
+	out.URL = url
+	out.Interfaces = interfaces
+	return c.Reply(&out)
+}
+
+func (c *Call) replyGetInterfaceDescription(description string) error {
+	var out struct {
+		Description string `json:"description,omitempty"`
+	}
+	out.Description = description
+	return c.Reply(&out)
+}
+
+func (s *Service) orgvarlinkserviceDispatch(c Call, methodname string) error {
+	switch methodname {
+	case "GetInfo":
+		return s.getInfo(c)
+	case "GetInterfaceDescription":
+		var in struct {
+			Interface string `json:"interface"`
+		}
+		err := c.GetParameters(&in)
+		if err != nil {
+			return c.ReplyInvalidParameter("parameters")
+		}
+		return s.getInterfaceDescription(c, in.Interface)
+
+	default:
+		return c.ReplyMethodNotFound(methodname)
+	}
+}
+
+func (s *orgvarlinkserviceInterface) VarlinkDispatch(call Call, methodname string) error {
+	return nil
+}
+
+func (s *orgvarlinkserviceInterface) VarlinkGetName() string {
+	return `org.varlink.service`
+}
+
+func (s *orgvarlinkserviceInterface) VarlinkGetDescription() string {
+	return `# The Varlink Service Interface is provided by every varlink service. It
+# describes the service and the interfaces it implements.
+interface org.varlink.service
+
+# Get a list of all the interfaces a service provides and information
+# about the implementation.
+method GetInfo() -> (
+  vendor: string,
+  product: string,
+  version: string,
+  url: string,
+  interfaces: []string
+)
+
+# Get the description of an interface that is implemented by this service.
+method GetInterfaceDescription(interface: string) -> (description: string)
+
+# The requested interface was not found.
+error InterfaceNotFound (interface: string)
+
+# The requested method was not found
+error MethodNotFound (method: string)
+
+# The interface defines the requested method, but the service does not
+# implement it.
+error MethodNotImplemented (method: string)
+
+# One of the passed parameters is invalid.
+error InvalidParameter (parameter: string)`
+}
+
+type orgvarlinkserviceInterface struct{}
+
+func orgvarlinkserviceNew() *orgvarlinkserviceInterface {
+	return &orgvarlinkserviceInterface{}
+}
diff --git a/vendor/github.com/varlink/go/varlink/resolver.go b/vendor/github.com/varlink/go/varlink/resolver.go
new file mode 100644
index 000000000..f0f4487d2
--- /dev/null
+++ b/vendor/github.com/varlink/go/varlink/resolver.go
@@ -0,0 +1,92 @@
+package varlink
+
+// ResolverAddress is the well-known address of the varlink interface resolver,
+// it translates varlink interface names to varlink service addresses.
+const ResolverAddress = "unix:/run/org.varlink.resolver"
+
+// Resolver resolves varlink interface names to varlink addresses
+type Resolver struct {
+	address string
+	conn    *Connection
+}
+
+// Resolve resolves a varlink interface name to a varlink address.
+func (r *Resolver) Resolve(iface string) (string, error) {
+	type request struct {
+		Interface string `json:"interface"`
+	}
+	type reply struct {
+		Address string `json:"address"`
+	}
+
+	/* don't ask the resolver for itself */
+	if iface == "org.varlink.resolver" {
+		return r.address, nil
+	}
+
+	var rep reply
+	err := r.conn.Call("org.varlink.resolver.Resolve", &request{Interface: iface}, &rep)
+	if err != nil {
+		return "", err
+	}
+
+	return rep.Address, nil
+}
+
+// GetInfo requests information about the resolver.
+func (r *Resolver) GetInfo(vendor *string, product *string, version *string, url *string, interfaces *[]string) error {
+	type reply struct {
+		Vendor     string
+		Product    string
+		Version    string
+		URL        string
+		Interfaces []string
+	}
+
+	var rep reply
+	err := r.conn.Call("org.varlink.resolver.GetInfo", nil, &rep)
+	if err != nil {
+		return err
+	}
+
+	if vendor != nil {
+		*vendor = rep.Vendor
+	}
+	if product != nil {
+		*product = rep.Product
+	}
+	if version != nil {
+		*version = rep.Version
+	}
+	if url != nil {
+		*url = rep.URL
+	}
+	if interfaces != nil {
+		*interfaces = rep.Interfaces
+	}
+
+	return nil
+}
+
+// Close terminates the resolver.
+func (r *Resolver) Close() error {
+	return r.conn.Close()
+}
+
+// NewResolver returns a new resolver connected to the given address.
+func NewResolver(address string) (*Resolver, error) {
+	if address == "" {
+		address = ResolverAddress
+	}
+
+	c, err := NewConnection(address)
+	if err != nil {
+		return nil, err
+	}
+	r := Resolver{
+		address: address,
+		conn:    c,
+	}
+
+	return &r, nil
+}
diff --git a/vendor/github.com/varlink/go/varlink/service.go b/vendor/github.com/varlink/go/varlink/service.go
new file mode 100644
index 000000000..eb110e503
--- /dev/null
+++ b/vendor/github.com/varlink/go/varlink/service.go
@@ -0,0 +1,350 @@
+package varlink
+
+import (
+	"bufio"
+	"encoding/json"
+	"fmt"
+	"net"
+	"os"
+	"strconv"
+	"strings"
+	"sync"
+	"syscall"
+	"time"
+)
+
+type dispatcher interface {
+	VarlinkDispatch(c Call, methodname string) error
+	VarlinkGetName() string
+	VarlinkGetDescription() string
+}
+
+type serviceCall struct {
+	Method     string           `json:"method"`
+	Parameters *json.RawMessage `json:"parameters,omitempty"`
+	More       bool             `json:"more,omitempty"`
+	OneShot    bool             `json:"oneshot,omitempty"`
+}
+
+type serviceReply struct {
+	Parameters interface{} `json:"parameters,omitempty"`
+	Continues  bool        `json:"continues,omitempty"`
+	Error      string      `json:"error,omitempty"`
+}
+
+// Service represents an active varlink service. In addition to the registered custom varlink Interfaces, every service
+// implements the org.varlink.service interface which allows clients to retrieve information about the
+// running service.
+type Service struct {
+	vendor       string
+	product      string
+	version      string
+	url          string
+	interfaces   map[string]dispatcher
+	names        []string
+	descriptions map[string]string
+	running      bool
+	listener     net.Listener
+	conncounter  int64
+	mutex        sync.Mutex
+	protocol     string
+	address      string
+}
+
+func (s *Service) getInfo(c Call) error {
+	return c.replyGetInfo(s.vendor, s.product, s.version, s.url, s.names)
+}
+
+func (s *Service) getInterfaceDescription(c Call, name string) error {
+	if name == "" {
+		return c.ReplyInvalidParameter("interface")
+	}
+
+	description, ok := s.descriptions[name]
+	if !ok {
+		return c.ReplyInvalidParameter("interface")
+	}
+
+	return c.replyGetInterfaceDescription(description)
+}
+
+func (s *Service) handleMessage(writer *bufio.Writer, request []byte) error {
+	var in serviceCall
+
+	err := json.Unmarshal(request, &in)
+
+	if err != nil {
+		return err
+	}
+
+	c := Call{
+		writer: writer,
+		in:     &in,
+	}
+
+	r := strings.LastIndex(in.Method, ".")
+	if r <= 0 {
+		return c.ReplyInvalidParameter("method")
+	}
+
+	interfacename := in.Method[:r]
+	methodname := in.Method[r+1:]
+
+	if interfacename == "org.varlink.service" {
+		return s.orgvarlinkserviceDispatch(c, methodname)
+	}
+
+	// Find the interface and method in our service
+	iface, ok := s.interfaces[interfacename]
+	if !ok {
+		return c.ReplyInterfaceNotFound(interfacename)
+	}
+
+	return iface.VarlinkDispatch(c, methodname)
+}
+
+func activationListener() net.Listener {
+	pid, err := strconv.Atoi(os.Getenv("LISTEN_PID"))
+	if err != nil || pid != os.Getpid() {
+		return nil
+	}
+
+	nfds, err := strconv.Atoi(os.Getenv("LISTEN_FDS"))
+	if err != nil || nfds < 1 {
+		return nil
+	}
+
+	fd := -1
+
+	// If more than one file descriptor is passed, find the
+	// "varlink" tag. The first file descriptor is always 3.
+	if nfds > 1 {
+		fdnames, set := os.LookupEnv("LISTEN_FDNAMES")
+		if !set {
+			return nil
+		}
+
+		names := strings.Split(fdnames, ":")
+		if len(names) != nfds {
+			return nil
+		}
+
+		for i, name := range names {
+			if name == "varlink" {
+				fd = 3 + i
+				break
+			}
+		}
+
+		if fd < 0 {
+			return nil
+		}
+
+	} else {
+		fd = 3
+	}
+
+	syscall.CloseOnExec(fd)
+
+	file := os.NewFile(uintptr(fd), "varlink")
+	listener, err := net.FileListener(file)
+	if err != nil {
+		return nil
+	}
+
+	os.Unsetenv("LISTEN_PID")
+	os.Unsetenv("LISTEN_FDS")
+	os.Unsetenv("LISTEN_FDNAMES")
+
+	return listener
+}
+
+// Shutdown shuts down the listener of a running service.
+func (s *Service) Shutdown() {
+	s.running = false
+	s.mutex.Lock()
+	if s.listener != nil {
+		s.listener.Close()
+	}
+	s.mutex.Unlock()
+}
+
+func (s *Service) handleConnection(conn net.Conn, wg *sync.WaitGroup) {
+	defer func() { s.mutex.Lock(); s.conncounter--; s.mutex.Unlock(); wg.Done() }()
+	reader := bufio.NewReader(conn)
+	writer := bufio.NewWriter(conn)
+
+	for {
+		request, err := reader.ReadBytes('\x00')
+		if err != nil {
+			break
+		}
+
+		err = s.handleMessage(writer, request[:len(request)-1])
+		if err != nil {
+			// FIXME: report error
+			//fmt.Fprintf(os.Stderr, "handleMessage: %v", err)
+			break
+		}
+	}
+
+	conn.Close()
+}
+
+func (s *Service) teardown() {
+	s.mutex.Lock()
+	s.listener = nil
+	s.running = false
+	s.protocol = ""
+	s.address = ""
+	s.mutex.Unlock()
+}
+
+func (s *Service) parseAddress(address string) error {
+	words := strings.SplitN(address, ":", 2)
+	s.protocol = words[0]
+	s.address = words[1]
+
+	// Ignore parameters after ';'
+	words = strings.SplitN(s.address, ";", 2)
+	if words != nil {
+		s.address = words[0]
+	}
+
+	switch s.protocol {
+	case "unix":
+		break
+	case "tcp":
+		break
+
+	default:
+		return fmt.Errorf("Unknown protocol")
+	}
+
+	return nil
+}
+
+func getListener(protocol string, address string) (net.Listener, error) {
+	l := activationListener()
+	if l == nil {
+		if protocol == "unix" && address[0] != '@' {
+			os.Remove(address)
+		}
+
+		var err error
+		l, err = net.Listen(protocol, address)
+		if err != nil {
+			return nil, err
+		}
+
+		if protocol == "unix" && address[0] != '@' {
+			l.(*net.UnixListener).SetUnlinkOnClose(true)
+		}
+	}
+
+	return l, nil
+}
+
+func (s *Service) refreshTimeout(timeout time.Duration) error {
+	switch s.protocol {
+	case "unix":
+		if err := s.listener.(*net.UnixListener).SetDeadline(time.Now().Add(timeout)); err != nil {
+			return err
+		}
+
+	case "tcp":
+		if err := s.listener.(*net.TCPListener).SetDeadline(time.Now().Add(timeout)); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// Listen starts a Service.
+func (s *Service) Listen(address string, timeout time.Duration) error {
+	var wg sync.WaitGroup
+	defer func() { s.teardown(); wg.Wait() }()
+
+	s.mutex.Lock()
+	if s.running {
+		s.mutex.Unlock()
+		return fmt.Errorf("Listen(): already running")
+	}
+	s.mutex.Unlock()
+
+	s.parseAddress(address)
+
+	l, err := getListener(s.protocol, s.address)
+	if err != nil {
+		return err
+	}
+
+	s.mutex.Lock()
+	s.listener = l
+	s.running = true
+	s.mutex.Unlock()
+
+	for s.running {
+		if timeout != 0 {
+			if err := s.refreshTimeout(timeout); err != nil {
+				return err
+			}
+		}
+		conn, err := l.Accept()
+		if err != nil {
+			if err.(net.Error).Timeout() {
+				s.mutex.Lock()
+				if s.conncounter == 0 {
+					s.mutex.Unlock()
+					return nil
+				}
+				s.mutex.Unlock()
+				continue
+			}
+			if !s.running {
+				return nil
+			}
+			return err
+		}
+		s.mutex.Lock()
+		s.conncounter++
+		s.mutex.Unlock()
+		wg.Add(1)
+		go s.handleConnection(conn, &wg)
+	}
+
+	return nil
+}
+
+// RegisterInterface registers a varlink.Interface containing struct to the Service
+func (s *Service) RegisterInterface(iface dispatcher) error {
+	name := iface.VarlinkGetName()
+	if _, ok := s.interfaces[name]; ok {
+		return fmt.Errorf("interface '%s' already registered", name)
+	}
+
+	if s.running {
+		return fmt.Errorf("service is already running")
+	}
+	s.interfaces[name] = iface
+	s.descriptions[name] = iface.VarlinkGetDescription()
+	s.names = append(s.names, name)
+
+	return nil
+}
+
+// NewService creates a new Service which implements the list of given varlink interfaces.
+func NewService(vendor string, product string, version string, url string) (*Service, error) {
+	s := Service{
+		vendor:       vendor,
+		product:      product,
+		version:      version,
+		url:          url,
+		interfaces:   make(map[string]dispatcher),
+		descriptions: make(map[string]string),
+	}
+	err := s.RegisterInterface(orgvarlinkserviceNew())
+
+	return &s, err
+}
diff --git a/vendor/github.com/varlink/go/varlink/varlink_test.go b/vendor/github.com/varlink/go/varlink/varlink_test.go
new file mode 100644
index 000000000..e19e768a2
--- /dev/null
+++ b/vendor/github.com/varlink/go/varlink/varlink_test.go
@@ -0,0 +1,232 @@
+package varlink
+
+// tests with access to internals
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"strings"
+	"testing"
+)
+
+func expect(t *testing.T, expected string, returned string) {
+	if strings.Compare(returned, expected) != 0 {
+		t.Fatalf("Expected(%d): `%s`\nGot(%d): `%s`\n",
+			len(expected), expected,
+			len(returned), strings.Replace(returned, "\000", "`+\"\\000\"+`", -1))
+	}
+}
+
+func TestService(t *testing.T) {
+	service, _ := NewService(
+		"Varlink",
+		"Varlink Test",
+		"1",
+		"https://github.com/varlink/go/varlink",
+	)
+
+	t.Run("ZeroMessage", func(t *testing.T) {
+		var b bytes.Buffer
+		w := bufio.NewWriter(&b)
+		if err := service.handleMessage(w, []byte{0}); err == nil {
+			t.Fatal("HandleMessage returned non-error")
+		}
+	})
+
+	t.Run("InvalidJson", func(t *testing.T) {
+		var b bytes.Buffer
+		w := bufio.NewWriter(&b)
+		msg := []byte(`{"method":"foo.GetInterfaceDescription" fdgdfg}`)
+		if err := service.handleMessage(w, msg); err == nil {
+			t.Fatal("HandleMessage returned no error on invalid json")
+		}
+	})
+
+	t.Run("WrongInterface", func(t *testing.T) {
+		var b bytes.Buffer
+		w := bufio.NewWriter(&b)
+		msg := []byte(`{"method":"foo.GetInterfaceDescription"}`)
+		if err := service.handleMessage(w, msg); err != nil {
+			t.Fatal("HandleMessage returned error on wrong interface")
+		}
+		expect(t, `{"parameters":{"interface":"foo"},"error":"org.varlink.service.InterfaceNotFound"}`+"\000",
+			b.String())
+	})
+
+	t.Run("InvalidMethod", func(t *testing.T) {
+		var b bytes.Buffer
+		w := bufio.NewWriter(&b)
+		msg := []byte(`{"method":"InvalidMethod"}`)
+		if err := service.handleMessage(w, msg); err != nil {
+			t.Fatal("HandleMessage returned error on invalid method")
+		}
+		expect(t, `{"parameters":{"parameter":"method"},"error":"org.varlink.service.InvalidParameter"}`+"\000",
+			b.String())
+	})
+
+	t.Run("WrongMethod", func(t *testing.T) {
+		var b bytes.Buffer
+		w := bufio.NewWriter(&b)
+		msg := []byte(`{"method":"org.varlink.service.WrongMethod"}`)
+		if err := service.handleMessage(w, msg); err != nil {
+			t.Fatal("HandleMessage returned error on wrong method")
+		}
+		expect(t, `{"parameters":{"method":"WrongMethod"},"error":"org.varlink.service.MethodNotFound"}`+"\000",
+			b.String())
+	})
+
+	t.Run("GetInterfaceDescriptionNullParameters", func(t *testing.T) {
+		var b bytes.Buffer
+		w := bufio.NewWriter(&b)
+		msg := []byte(`{"method":"org.varlink.service.GetInterfaceDescription","parameters": null}`)
+		if err := service.handleMessage(w, msg); err != nil {
+			t.Fatalf("HandleMessage returned error: %v", err)
+		}
+		expect(t, `{"parameters":{"parameter":"parameters"},"error":"org.varlink.service.InvalidParameter"}`+"\000",
+			b.String())
+	})
+
+	t.Run("GetInterfaceDescriptionNoInterface", func(t *testing.T) {
+		var b bytes.Buffer
+		w := bufio.NewWriter(&b)
+		msg := []byte(`{"method":"org.varlink.service.GetInterfaceDescription","parameters":{}}`)
+		if err := service.handleMessage(w, msg); err != nil {
+			t.Fatalf("HandleMessage returned error: %v", err)
+		}
+		expect(t, `{"parameters":{"parameter":"interface"},"error":"org.varlink.service.InvalidParameter"}`+"\000",
+			b.String())
+	})
+
+	t.Run("GetInterfaceDescriptionWrongInterface", func(t *testing.T) {
+		var b bytes.Buffer
+		w := bufio.NewWriter(&b)
+		msg := []byte(`{"method":"org.varlink.service.GetInterfaceDescription","parameters":{"interface":"foo"}}`)
+		if err := service.handleMessage(w, msg); err != nil {
+			t.Fatalf("HandleMessage returned error: %v", err)
+		}
+		expect(t, `{"parameters":{"parameter":"interface"},"error":"org.varlink.service.InvalidParameter"}`+"\000",
+			b.String())
+	})
+
+	t.Run("GetInterfaceDescription", func(t *testing.T) {
+		var b bytes.Buffer
+		w := bufio.NewWriter(&b)
+		msg := []byte(`{"method":"org.varlink.service.GetInterfaceDescription","parameters":{"interface":"org.varlink.service"}}`)
+		if err := service.handleMessage(w, msg); err != nil {
+			t.Fatalf("HandleMessage returned error: %v", err)
+		}
+		expect(t, `{"parameters":{"description":"# The Varlink Service Interface is provided by every varlink service. It\n# describes the service and the interfaces it implements.\ninterface org.varlink.service\n\n# Get a list of all the interfaces a service provides and information\n# about the implementation.\nmethod GetInfo() -\u003e (\n  vendor: string,\n  product: string,\n  version: string,\n  url: string,\n  interfaces: []string\n)\n\n# Get the description of an interface that is implemented by this service.\nmethod GetInterfaceDescription(interface: string) -\u003e (description: string)\n\n# The requested interface was not found.\nerror InterfaceNotFound (interface: string)\n\n# The requested method was not found\nerror MethodNotFound (method: string)\n\n# The interface defines the requested method, but the service does not\n# implement it.\nerror MethodNotImplemented (method: string)\n\n# One of the passed parameters is invalid.\nerror InvalidParameter (parameter: string)"}}`+"\000",
+			b.String())
+	})
+
+	t.Run("GetInfo", func(t *testing.T) {
+		var b bytes.Buffer
+		w := bufio.NewWriter(&b)
+		msg := []byte(`{"method":"org.varlink.service.GetInfo"}`)
+		if err := service.handleMessage(w, msg); err != nil {
+			t.Fatalf("HandleMessage returned error: %v", err)
+		}
+		expect(t, `{"parameters":{"vendor":"Varlink","product":"Varlink Test","version":"1","url":"https://github.com/varlink/go/varlink","interfaces":["org.varlink.service"]}}`+"\000",
+			b.String())
+	})
+}
+
+type VarlinkInterface struct{}
+
+func (s *VarlinkInterface) VarlinkDispatch(call Call, methodname string) error {
+	switch methodname {
+	case "Ping":
+		if !call.WantsMore() {
+			return fmt.Errorf("More flag not passed")
+		}
+		if call.IsOneShot() {
+			return fmt.Errorf("OneShot flag set")
+		}
+		call.Continues = true
+		if err := call.Reply(nil); err != nil {
+			return err
+		}
+		if err := call.Reply(nil); err != nil {
+			return err
+		}
+		call.Continues = false
+		if err := call.Reply(nil); err != nil {
+			return err
+		}
+		return nil
+
+	case "PingError":
+		return call.ReplyError("org.example.test.PingError", nil)
+	}
+
+	call.Continues = true
+	if err := call.Reply(nil); err == nil {
+		return fmt.Errorf("call.Reply did not fail for Continues/More mismatch")
+	}
+	call.Continues = false
+
+	if err := call.ReplyError("WrongName", nil); err == nil {
+		return fmt.Errorf("call.ReplyError accepted invalid error name")
+	}
+
+	if err := call.ReplyError("org.varlink.service.MethodNotImplemented", nil); err == nil {
+		return fmt.Errorf("call.ReplyError accepted org.varlink.service error")
+	}
+
+	return call.ReplyMethodNotImplemented(methodname)
+}
+func (s *VarlinkInterface) VarlinkGetName() string {
+	return `org.example.test`
+}
+
+func (s *VarlinkInterface) VarlinkGetDescription() string {
+	return "#"
+}
+
+func TestMoreService(t *testing.T) {
+	newTestInterface := new(VarlinkInterface)
+
+	service, _ := NewService(
+		"Varlink",
+		"Varlink Test",
+		"1",
+		"https://github.com/varlink/go/varlink",
+	)
+
+	if err := service.RegisterInterface(newTestInterface); err != nil {
+		t.Fatalf("Couldn't register service: %v", err)
+	}
+
+	t.Run("MethodNotImplemented", func(t *testing.T) {
+		var b bytes.Buffer
+		w := bufio.NewWriter(&b)
+		msg := []byte(`{"method":"org.example.test.Pingf"}`)
+		if err := service.handleMessage(w, msg); err != nil {
+			t.Fatalf("HandleMessage returned error: %v", err)
+		}
+		expect(t, `{"parameters":{"method":"Pingf"},"error":"org.varlink.service.MethodNotImplemented"}`+"\000",
+			b.String())
+	})
+
+	t.Run("PingError", func(t *testing.T) {
+		var b bytes.Buffer
+		w := bufio.NewWriter(&b)
+		msg := []byte(`{"method":"org.example.test.PingError", "more" : true}`)
+		if err := service.handleMessage(w, msg); err != nil {
+			t.Fatalf("HandleMessage returned error: %v", err)
+		}
+		expect(t, `{"error":"org.example.test.PingError"}`+"\000",
+			b.String())
+	})
+	t.Run("MoreTest", func(t *testing.T) {
+		var b bytes.Buffer
+		w := bufio.NewWriter(&b)
+		msg := []byte(`{"method":"org.example.test.Ping", "more" : true}`)
+		if err := service.handleMessage(w, msg); err != nil {
+			t.Fatalf("HandleMessage returned error: %v", err)
+		}
+		expect(t, `{"continues":true}`+"\000"+`{"continues":true}`+"\000"+`{}`+"\000",
+			b.String())
+	})
+}