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union.go
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union.go
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// Copyright 2017 ETH Zurich
//
// 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.
package ctrl
import (
//log "github.com/inconshreveable/log15"
"github.com/scionproto/scion/go/lib/common"
"github.com/scionproto/scion/go/lib/ctrl/cert_mgmt"
"github.com/scionproto/scion/go/lib/ctrl/extn"
"github.com/scionproto/scion/go/lib/ctrl/ifid"
"github.com/scionproto/scion/go/lib/ctrl/path_mgmt"
"github.com/scionproto/scion/go/lib/ctrl/seg"
"github.com/scionproto/scion/go/proto"
sigmgmt "github.com/scionproto/scion/go/sig/mgmt"
)
// union represents the contents of the unnamed capnp union.
type union struct {
Which proto.CtrlPld_Which
PathSegment *seg.PathSegment `capnp:"pcb"`
IfID *ifid.IFID `capnp:"ifid"`
CertMgmt *cert_mgmt.Pld
PathMgmt *path_mgmt.Pld
Sibra []byte `capnp:"-"` // Omit for now
DRKeyMgmt []byte `capnp:"-"` // Omit for now
Sig *sigmgmt.Pld
Extn *extn.CtrlExtnDataList
}
func (u *union) set(c proto.Cerealizable) error {
switch p := c.(type) {
case *seg.PathSegment:
u.Which = proto.CtrlPld_Which_pcb
u.PathSegment = p
case *ifid.IFID:
u.Which = proto.CtrlPld_Which_ifid
u.IfID = p
case *path_mgmt.Pld:
u.Which = proto.CtrlPld_Which_pathMgmt
u.PathMgmt = p
case *sigmgmt.Pld:
u.Which = proto.CtrlPld_Which_sig
u.Sig = p
case *cert_mgmt.Pld:
u.Which = proto.CtrlPld_Which_certMgmt
u.CertMgmt = p
case *extn.CtrlExtnDataList:
u.Which = proto.CtrlPld_Which_extn
u.Extn = p
default:
return common.NewBasicError("Unsupported ctrl union type (set)", nil,
"type", common.TypeOf(c))
}
return nil
}
func (u *union) get() (proto.Cerealizable, error) {
switch u.Which {
case proto.CtrlPld_Which_pcb:
return u.PathSegment, nil
case proto.CtrlPld_Which_ifid:
return u.IfID, nil
case proto.CtrlPld_Which_pathMgmt:
return u.PathMgmt, nil
case proto.CtrlPld_Which_sig:
return u.Sig, nil
case proto.CtrlPld_Which_certMgmt:
return u.CertMgmt, nil
case proto.CtrlPld_Which_extn:
return u.Extn, nil
}
return nil, common.NewBasicError("Unsupported ctrl union type (get)", nil, "type", u.Which)
}