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|
package proxy
import (
"fmt"
"log"
"net/rpc"
"reflect"
"time"
"git.fd.io/govpp.git/api"
)
type Client struct {
serverAddr string
rpc *rpc.Client
}
// Connect dials remote proxy server on given address and
// returns new client if successful.
func Connect(addr string) (*Client, error) {
client, err := rpc.DialHTTP("tcp", addr)
if err != nil {
log.Fatal("Connection error: ", err)
}
c := &Client{
serverAddr: addr,
rpc: client,
}
return c, nil
}
// NewStatsClient returns new StatsClient which implements api.StatsProvider.
func (c *Client) NewStatsClient() (*StatsClient, error) {
stats := &StatsClient{
rpc: c.rpc,
}
return stats, nil
}
// NewBinapiClient returns new BinapiClient which implements api.Channel.
func (c *Client) NewBinapiClient() (*BinapiClient, error) {
binapi := &BinapiClient{
rpc: c.rpc,
}
return binapi, nil
}
type StatsClient struct {
rpc *rpc.Client
}
func (s *StatsClient) GetSystemStats(sysStats *api.SystemStats) error {
req := StatsRequest{StatsType: "system"}
resp := StatsResponse{SysStats: sysStats}
return s.rpc.Call("StatsRPC.GetStats", req, &resp)
}
func (s *StatsClient) GetNodeStats(nodeStats *api.NodeStats) error {
req := StatsRequest{StatsType: "node"}
resp := StatsResponse{NodeStats: nodeStats}
return s.rpc.Call("StatsRPC.GetStats", req, &resp)
}
func (s *StatsClient) GetInterfaceStats(ifaceStats *api.InterfaceStats) error {
req := StatsRequest{StatsType: "interface"}
resp := StatsResponse{IfaceStats: ifaceStats}
return s.rpc.Call("StatsRPC.GetStats", req, &resp)
}
func (s *StatsClient) GetErrorStats(errStats *api.ErrorStats) error {
req := StatsRequest{StatsType: "error"}
resp := StatsResponse{ErrStats: errStats}
return s.rpc.Call("StatsRPC.GetStats", req, &resp)
}
func (s *StatsClient) GetBufferStats(bufStats *api.BufferStats) error {
req := StatsRequest{StatsType: "buffer"}
resp := StatsResponse{BufStats: bufStats}
return s.rpc.Call("StatsRPC.GetStats", req, &resp)
}
type BinapiClient struct {
rpc *rpc.Client
}
func (b *BinapiClient) SendRequest(msg api.Message) api.RequestCtx {
req := &requestCtx{
rpc: b.rpc,
req: msg,
}
log.Printf("SendRequest: %T %+v", msg, msg)
return req
}
type requestCtx struct {
rpc *rpc.Client
req api.Message
}
func (r *requestCtx) ReceiveReply(msg api.Message) error {
req := BinapiRequest{
Msg: r.req,
ReplyMsg: msg,
}
resp := BinapiResponse{}
err := r.rpc.Call("BinapiRPC.Invoke", req, &resp)
if err != nil {
return fmt.Errorf("RPC call failed: %v", err)
}
// we set the value of msg to the value from response
reflect.ValueOf(msg).Elem().Set(reflect.ValueOf(resp.Msg).Elem())
return nil
}
func (b *BinapiClient) SendMultiRequest(msg api.Message) api.MultiRequestCtx {
req := &multiRequestCtx{
rpc: b.rpc,
req: msg,
}
log.Printf("SendMultiRequest: %T %+v", msg, msg)
return req
}
type multiRequestCtx struct {
rpc *rpc.Client
req api.Message
index int
replies []api.Message
}
func (r *multiRequestCtx) ReceiveReply(msg api.Message) (stop bool, err error) {
// we call Invoke only on first ReceiveReply
if r.index == 0 {
req := BinapiRequest{
Msg: r.req,
ReplyMsg: msg,
IsMulti: true,
}
resp := BinapiResponse{}
err := r.rpc.Call("BinapiRPC.Invoke", req, &resp)
if err != nil {
return false, fmt.Errorf("RPC call failed: %v", err)
}
r.replies = resp.Msgs
}
if r.index >= len(r.replies) {
return true, nil
}
// we set the value of msg to the value from response
reflect.ValueOf(msg).Elem().Set(reflect.ValueOf(r.replies[r.index]).Elem())
r.index++
return false, nil
}
func (b *BinapiClient) SubscribeNotification(notifChan chan api.Message, event api.Message) (api.SubscriptionCtx, error) {
panic("implement me")
}
func (b *BinapiClient) SetReplyTimeout(timeout time.Duration) {
panic("implement me")
}
func (b *BinapiClient) CheckCompatiblity(msgs ...api.Message) error {
return nil // TODO: proxy this
}
func (b *BinapiClient) Close() {
b.rpc.Close()
}
|
