implement pona cmdAdd

Signed-off-by: walnuts1018 <[email protected]>

cmd/pona/main.go

@@ -7,6 +7,8 @@ import (
 
 	"github.com/containernetworking/cni/pkg/skel"
 	"github.com/containernetworking/cni/pkg/types"
+	cni100 "github.com/containernetworking/cni/pkg/types/100"
+
 	"github.com/containernetworking/cni/pkg/version"
 	"github.com/cybozu-go/pona"
 	"github.com/cybozu-go/pona/pkg/cni"
@@ -36,12 +38,26 @@ func cmdAdd(args *skel.CmdArgs) error {
 	ctx, cancel := context.WithTimeout(context.Background(), 1*time.Minute)
 	defer cancel()
 
-	resp, err := client.Add(ctx, cni)
+	resp, err := client.Add(ctx, cniArgs)
+	if err != nil {
+		return convertError(err)
+	}
+
+	result, err := cni100.NewResult(resp.Result)
+	if err != nil {
+		return types.NewError(types.ErrDecodingFailure, "failed to unmarshal result", err.Error())
+	}
+
+	return types.PrintResult(result, conf.CNIVersion)
 }
 
-func cmdDel(args *skel.CmdArgs) error
+func cmdDel(args *skel.CmdArgs) error {
+	return nil
+}
 
-func cmdCheck(args *skel.CmdArgs) error
+func cmdCheck(args *skel.CmdArgs) error {
+	return nil
+}
 
 func main() {
 	skel.PluginMainFuncs(skel.CNIFuncs{Add: cmdAdd, Del: cmdDel, Check: cmdCheck, GC: nil, Status: nil}, version.PluginSupports("0.3.1", "0.4.0", "1.0.0"), fmt.Sprintf("coil %s", pona.Version))

cmd/pona/rpc.go

@@ -12,6 +12,7 @@ import (
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials/insecure"
 	"google.golang.org/grpc/resolver"
+	"google.golang.org/grpc/status"
 )
 
 // PluginEnvArgs represents CNI_ARG
@@ -59,3 +60,19 @@ func connect(sockPath string) (*grpc.ClientConn, error) {
 	}
 	return conn, nil
 }
+
+// convertError turns err returned from gRPC library into CNI's types.Error
+func convertError(err error) error {
+	st := status.Convert(err)
+	details := st.Details()
+	if len(details) != 1 {
+		return types.NewError(types.ErrInternal, st.Message(), err.Error())
+	}
+
+	cniErr, ok := details[0].(*cnirpc.CNIError)
+	if !ok {
+		types.NewError(types.ErrInternal, st.Message(), err.Error())
+	}
+
+	return types.NewError(uint(cniErr.Code), cniErr.Msg, cniErr.Details)
+}