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stn_vppcalls.go
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stn_vppcalls.go
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// Copyright (c) 2018 Cisco and/or its affiliates.
//
// 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 vppcalls
import (
govppapi "git.fd.io/govpp.git/api"
"github.com/ligato/cn-infra/logging"
stn "github.com/ligato/vpp-agent/api/models/vpp/stn"
"github.com/ligato/vpp-agent/plugins/vpp/ifplugin/ifaceidx"
)
// StnDetails contains a proto-modelled STN data and VPP specific metadata
type StnDetails struct {
Rule *stn.Rule
Meta *StnMeta
}
// StnMeta contains an index of the interface defined by name in the STN rule
type StnMeta struct {
IfIdx uint32
}
// StnVppAPI provides methods for managing STN rules
type StnVppAPI interface {
StnVppRead
// AddSTNRule calls StnAddDelRule bin API with IsAdd=1
AddSTNRule(stnRule *stn.Rule) error
// DelSTNRule calls StnAddDelRule bin API with IsAdd=0
DeleteSTNRule(stnRule *stn.Rule) error
}
// StnVppRead provides read methods for STN rules
type StnVppRead interface {
// DumpSTNRules returns a list of all STN rules configured on the VPP
DumpSTNRules() ([]*StnDetails, error)
}
var Versions = map[string]HandlerVersion{}
type HandlerVersion struct {
Msgs []govppapi.Message
New func(govppapi.Channel, ifaceidx.IfaceMetadataIndex, logging.Logger) StnVppAPI
}
func CompatibleStnVppHandler(
ch govppapi.Channel, idx ifaceidx.IfaceMetadataIndex, log logging.Logger,
) StnVppAPI {
for ver, h := range Versions {
log.Debugf("checking compatibility with %s", ver)
if err := ch.CheckCompatiblity(h.Msgs...); err != nil {
continue
}
log.Debug("found compatible version:", ver)
return h.New(ch, idx, log)
}
panic("no compatible version available")
}