/
stn_vppcalls.go
89 lines (75 loc) · 2.31 KB
/
stn_vppcalls.go
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// Copyright (c) 2019 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 vpp2001_379
import (
"net"
"strings"
"github.com/pkg/errors"
stn "github.com/ligato/vpp-agent/api/models/vpp/stn"
vpp_stn "github.com/ligato/vpp-agent/plugins/vpp/binapi/vpp2001_379/stn"
)
// AddSTNRule implements STN handler, adds a new STN rule to the VPP.
func (h *StnVppHandler) AddSTNRule(stnRule *stn.Rule) error {
return h.addDelStnRule(stnRule, true)
}
// DeleteSTNRule implements STN handler, removes the provided STN rule from the VPP.
func (h *StnVppHandler) DeleteSTNRule(stnRule *stn.Rule) error {
return h.addDelStnRule(stnRule, false)
}
func (h *StnVppHandler) addDelStnRule(stnRule *stn.Rule, isAdd bool) error {
// get interface index
ifaceMeta, found := h.ifIndexes.LookupByName(stnRule.Interface)
if !found {
return errors.New("failed to get interface metadata")
}
swIfIndex := ifaceMeta.GetIndex()
// remove mask from IP address if necessary
ipAddr := stnRule.IpAddress
ipParts := strings.Split(ipAddr, "/")
if len(ipParts) > 1 {
h.log.Debugf("STN IP address %s is defined with mask, removing it")
ipAddr = ipParts[0]
}
// parse IP address
var byteIP []byte
var isIPv4 uint8
ip := net.ParseIP(ipAddr)
if ip == nil {
return errors.Errorf("failed to parse IP address %s", ipAddr)
} else if ip.To4() == nil {
byteIP = []byte(ip.To16())
isIPv4 = 0
} else {
byteIP = []byte(ip.To4())
isIPv4 = 1
}
// add STN rule
req := &vpp_stn.StnAddDelRule{
IsIP4: isIPv4,
IPAddress: byteIP,
SwIfIndex: swIfIndex,
IsAdd: boolToUint(isAdd),
}
reply := &vpp_stn.StnAddDelRuleReply{}
if err := h.callsChannel.SendRequest(req).ReceiveReply(reply); err != nil {
return err
}
return nil
}
func boolToUint(input bool) uint8 {
if input {
return 1
}
return 0
}