Improve binapi generator

- simplified Size/Marshal/Unmarshal methods
- replace struc in unions with custom marshal/unmarshal
- fix imports in generated files
- fix mock adapter
- generate rpc service using low-level stream API (dumps generate control ping or stream msg..)
- move examples/binapi to binapi and generate all API for latest release
- add binapigen.Plugin for developing custom generator plugins
- optionally generate HTTP handlers (REST API) for RPC services
- add govpp program for browsing VPP API

Change-Id: I092e9ed2b0c17972b3476463c3d4b14dd76ed42b
Signed-off-by: Ondrej Fabry <ofabry@cisco.com>

3 files changed, 184 insertions, 0 deletions

diff --git a/binapi/ioam_cache/ioam_cache.ba.go b/binapi/ioam_cache/ioam_cache.ba.go
new file mode 100644
index 0000000..d48b15b
--- /dev/null
+++ b/binapi/ioam_cache/ioam_cache.ba.go
@@ -0,0 +1,117 @@
+// Code generated by GoVPP's binapi-generator. DO NOT EDIT.
+// versions:
+//  binapi-generator: v0.4.0-dev
+//  VPP:              20.05-release
+// source: /usr/share/vpp/api/plugins/ioam_cache.api.json
+
+// Package ioam_cache contains generated bindings for API file ioam_cache.api.
+//
+// Contents:
+//   2 messages
+//
+package ioam_cache
+
+import (
+	api "git.fd.io/govpp.git/api"
+	codec "git.fd.io/govpp.git/codec"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the GoVPP api package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// GoVPP api package needs to be updated.
+const _ = api.GoVppAPIPackageIsVersion2
+
+const (
+	APIFile    = "ioam_cache"
+	APIVersion = "1.0.0"
+	VersionCrc = 0xd0a0cf20
+)
+
+// IoamCacheIP6EnableDisable defines message 'ioam_cache_ip6_enable_disable'.
+type IoamCacheIP6EnableDisable struct {
+	IsDisable bool `binapi:"bool,name=is_disable" json:"is_disable,omitempty"`
+}
+
+func (m *IoamCacheIP6EnableDisable) Reset()               { *m = IoamCacheIP6EnableDisable{} }
+func (*IoamCacheIP6EnableDisable) GetMessageName() string { return "ioam_cache_ip6_enable_disable" }
+func (*IoamCacheIP6EnableDisable) GetCrcString() string   { return "47705c03" }
+func (*IoamCacheIP6EnableDisable) GetMessageType() api.MessageType {
+	return api.RequestMessage
+}
+
+func (m *IoamCacheIP6EnableDisable) Size() int {
+	if m == nil {
+		return 0
+	}
+	var size int
+	size += 1 // m.IsDisable
+	return size
+}
+func (m *IoamCacheIP6EnableDisable) Marshal(b []byte) ([]byte, error) {
+	var buf *codec.Buffer
+	if b == nil {
+		buf = codec.NewBuffer(make([]byte, m.Size()))
+	} else {
+		buf = codec.NewBuffer(b)
+	}
+	buf.EncodeBool(m.IsDisable)
+	return buf.Bytes(), nil
+}
+func (m *IoamCacheIP6EnableDisable) Unmarshal(b []byte) error {
+	buf := codec.NewBuffer(b)
+	m.IsDisable = buf.DecodeBool()
+	return nil
+}
+
+// IoamCacheIP6EnableDisableReply defines message 'ioam_cache_ip6_enable_disable_reply'.
+type IoamCacheIP6EnableDisableReply struct {
+	Retval int32 `binapi:"i32,name=retval" json:"retval,omitempty"`
+}
+
+func (m *IoamCacheIP6EnableDisableReply) Reset() { *m = IoamCacheIP6EnableDisableReply{} }
+func (*IoamCacheIP6EnableDisableReply) GetMessageName() string {
+	return "ioam_cache_ip6_enable_disable_reply"
+}
+func (*IoamCacheIP6EnableDisableReply) GetCrcString() string { return "e8d4e804" }
+func (*IoamCacheIP6EnableDisableReply) GetMessageType() api.MessageType {
+	return api.ReplyMessage
+}
+
+func (m *IoamCacheIP6EnableDisableReply) Size() int {
+	if m == nil {
+		return 0
+	}
+	var size int
+	size += 4 // m.Retval
+	return size
+}
+func (m *IoamCacheIP6EnableDisableReply) Marshal(b []byte) ([]byte, error) {
+	var buf *codec.Buffer
+	if b == nil {
+		buf = codec.NewBuffer(make([]byte, m.Size()))
+	} else {
+		buf = codec.NewBuffer(b)
+	}
+	buf.EncodeUint32(uint32(m.Retval))
+	return buf.Bytes(), nil
+}
+func (m *IoamCacheIP6EnableDisableReply) Unmarshal(b []byte) error {
+	buf := codec.NewBuffer(b)
+	m.Retval = int32(buf.DecodeUint32())
+	return nil
+}
+
+func init() { file_ioam_cache_binapi_init() }
+func file_ioam_cache_binapi_init() {
+	api.RegisterMessage((*IoamCacheIP6EnableDisable)(nil), "ioam_cache_ip6_enable_disable_47705c03")
+	api.RegisterMessage((*IoamCacheIP6EnableDisableReply)(nil), "ioam_cache_ip6_enable_disable_reply_e8d4e804")
+}
+
+// Messages returns list of all messages in this module.
+func AllMessages() []api.Message {
+	return []api.Message{
+		(*IoamCacheIP6EnableDisable)(nil),
+		(*IoamCacheIP6EnableDisableReply)(nil),
+	}
+}
diff --git a/binapi/ioam_cache/ioam_cache_rest.ba.go b/binapi/ioam_cache/ioam_cache_rest.ba.go
new file mode 100644
index 0000000..4090307
--- /dev/null
+++ b/binapi/ioam_cache/ioam_cache_rest.ba.go
@@ -0,0 +1,37 @@
+// Code generated by GoVPP's binapi-generator. DO NOT EDIT.
+
+package ioam_cache
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+)
+
+func RESTHandler(rpc RPCService) http.Handler {
+	mux := http.NewServeMux()
+	mux.HandleFunc("/ioam_cache_ip6_enable_disable", func(w http.ResponseWriter, req *http.Request) {
+		var request = new(IoamCacheIP6EnableDisable)
+		b, err := ioutil.ReadAll(req.Body)
+		if err != nil {
+			http.Error(w, "read body failed", http.StatusBadRequest)
+			return
+		}
+		if err := json.Unmarshal(b, request); err != nil {
+			http.Error(w, "unmarshal data failed", http.StatusBadRequest)
+			return
+		}
+		reply, err := rpc.IoamCacheIP6EnableDisable(req.Context(), request)
+		if err != nil {
+			http.Error(w, "request failed: "+err.Error(), http.StatusInternalServerError)
+			return
+		}
+		rep, err := json.MarshalIndent(reply, "", "  ")
+		if err != nil {
+			http.Error(w, "marshal failed: "+err.Error(), http.StatusInternalServerError)
+			return
+		}
+		w.Write(rep)
+	})
+	return http.HandlerFunc(mux.ServeHTTP)
+}
diff --git a/binapi/ioam_cache/ioam_cache_rpc.ba.go b/binapi/ioam_cache/ioam_cache_rpc.ba.go
new file mode 100644
index 0000000..33a721f
--- /dev/null
+++ b/binapi/ioam_cache/ioam_cache_rpc.ba.go
@@ -0,0 +1,30 @@
+// Code generated by GoVPP's binapi-generator. DO NOT EDIT.
+
+package ioam_cache
+
+import (
+	"context"
+	api "git.fd.io/govpp.git/api"
+)
+
+// RPCService defines RPC service  ioam_cache.
+type RPCService interface {
+	IoamCacheIP6EnableDisable(ctx context.Context, in *IoamCacheIP6EnableDisable) (*IoamCacheIP6EnableDisableReply, error)
+}
+
+type serviceClient struct {
+	conn api.Connection
+}
+
+func NewServiceClient(conn api.Connection) RPCService {
+	return &serviceClient{conn}
+}
+
+func (c *serviceClient) IoamCacheIP6EnableDisable(ctx context.Context, in *IoamCacheIP6EnableDisable) (*IoamCacheIP6EnableDisableReply, error) {
+	out := new(IoamCacheIP6EnableDisableReply)
+	err := c.conn.Invoke(ctx, in, out)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}