go.ligato.io/vpp-agent/v3@v3.5.0/plugins/vpp/l3plugin/vppcalls/vpp2101/arp_vppcalls.go (about)

     1  //  Copyright (c) 2019 Cisco and/or its affiliates.
     2  //
     3  //  Licensed under the Apache License, Version 2.0 (the "License");
     4  //  you may not use this file except in compliance with the License.
     5  //  You may obtain a copy of the License at:
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  //  Unless required by applicable law or agreed to in writing, software
    10  //  distributed under the License is distributed on an "AS IS" BASIS,
    11  //  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  //  See the License for the specific language governing permissions and
    13  //  limitations under the License.
    14  
    15  package vpp2101
    16  
    17  import (
    18  	"net"
    19  
    20  	"github.com/pkg/errors"
    21  
    22  	"go.ligato.io/vpp-agent/v3/plugins/vpp/binapi/vpp2101/interface_types"
    23  	vpp_ip_neighbor "go.ligato.io/vpp-agent/v3/plugins/vpp/binapi/vpp2101/ip_neighbor"
    24  	l3 "go.ligato.io/vpp-agent/v3/proto/ligato/vpp/l3"
    25  )
    26  
    27  // vppAddDelArp adds or removes ARP entry according to provided input
    28  func (h *ArpVppHandler) vppAddDelArp(entry *l3.ARPEntry, delete bool) error {
    29  	meta, found := h.ifIndexes.LookupByName(entry.Interface)
    30  	if !found {
    31  		return errors.Errorf("interface %s not found", entry.Interface)
    32  	}
    33  
    34  	var flags vpp_ip_neighbor.IPNeighborFlags
    35  	flags |= vpp_ip_neighbor.IP_API_NEIGHBOR_FLAG_NO_FIB_ENTRY
    36  	if entry.Static {
    37  		flags |= vpp_ip_neighbor.IP_API_NEIGHBOR_FLAG_STATIC
    38  	}
    39  
    40  	req := &vpp_ip_neighbor.IPNeighborAddDel{
    41  		IsAdd: !delete,
    42  		Neighbor: vpp_ip_neighbor.IPNeighbor{
    43  			SwIfIndex: interface_types.InterfaceIndex(meta.SwIfIndex),
    44  			Flags:     flags,
    45  		},
    46  	}
    47  
    48  	var err error
    49  	req.Neighbor.IPAddress, err = ipToAddress(entry.IpAddress)
    50  	if err != nil {
    51  		return errors.WithStack(err)
    52  	}
    53  
    54  	macAddr, err := net.ParseMAC(entry.PhysAddress)
    55  	if err != nil {
    56  		return err
    57  	}
    58  	copy(req.Neighbor.MacAddress[:], macAddr)
    59  
    60  	reply := &vpp_ip_neighbor.IPNeighborAddDelReply{}
    61  	if err = h.callsChannel.SendRequest(req).ReceiveReply(reply); err != nil {
    62  		return err
    63  	}
    64  
    65  	return nil
    66  }
    67  
    68  // VppAddArp implements arp handler.
    69  func (h *ArpVppHandler) VppAddArp(entry *l3.ARPEntry) error {
    70  	return h.vppAddDelArp(entry, false)
    71  }
    72  
    73  // VppDelArp implements arp handler.
    74  func (h *ArpVppHandler) VppDelArp(entry *l3.ARPEntry) error {
    75  	return h.vppAddDelArp(entry, true)
    76  }