go.ligato.io/vpp-agent/v3@v3.5.0/plugins/vpp/l3plugin/vppcalls/vpp2106/proxyarp_vppcalls.go (about)

     1  //  Copyright (c) 2021 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 vpp2106
    16  
    17  import (
    18  	"fmt"
    19  	"net"
    20  
    21  	"github.com/pkg/errors"
    22  
    23  	vpp_arp "go.ligato.io/vpp-agent/v3/plugins/vpp/binapi/vpp2106/arp"
    24  	"go.ligato.io/vpp-agent/v3/plugins/vpp/binapi/vpp2106/interface_types"
    25  )
    26  
    27  // EnableProxyArpInterface implements proxy arp handler.
    28  func (h *ProxyArpVppHandler) EnableProxyArpInterface(ifName string) error {
    29  	return h.vppAddDelProxyArpInterface(ifName, true)
    30  }
    31  
    32  // DisableProxyArpInterface implements proxy arp handler.
    33  func (h *ProxyArpVppHandler) DisableProxyArpInterface(ifName string) error {
    34  	return h.vppAddDelProxyArpInterface(ifName, false)
    35  }
    36  
    37  // AddProxyArpRange implements proxy arp handler.
    38  func (h *ProxyArpVppHandler) AddProxyArpRange(firstIP, lastIP []byte, vrfID uint32) error {
    39  	return h.vppAddDelProxyArpRange(firstIP, lastIP, vrfID, true)
    40  }
    41  
    42  // DeleteProxyArpRange implements proxy arp handler.
    43  func (h *ProxyArpVppHandler) DeleteProxyArpRange(firstIP, lastIP []byte, vrfID uint32) error {
    44  	return h.vppAddDelProxyArpRange(firstIP, lastIP, vrfID, false)
    45  }
    46  
    47  // vppAddDelProxyArpInterface adds or removes proxy ARP interface entry according to provided input
    48  func (h *ProxyArpVppHandler) vppAddDelProxyArpInterface(ifName string, enable bool) error {
    49  	meta, found := h.ifIndexes.LookupByName(ifName)
    50  	if !found {
    51  		return errors.Errorf("interface %s not found", ifName)
    52  	}
    53  
    54  	req := &vpp_arp.ProxyArpIntfcEnableDisable{
    55  		Enable:    enable,
    56  		SwIfIndex: interface_types.InterfaceIndex(meta.SwIfIndex),
    57  	}
    58  
    59  	reply := &vpp_arp.ProxyArpIntfcEnableDisableReply{}
    60  	if err := h.callsChannel.SendRequest(req).ReceiveReply(reply); err != nil {
    61  		return err
    62  	}
    63  
    64  	h.log.Debugf("interface %v enabled for proxy arp: %v", req.SwIfIndex, enable)
    65  
    66  	return nil
    67  }
    68  
    69  // vppAddDelProxyArpRange adds or removes proxy ARP range according to provided input.
    70  func (h *ProxyArpVppHandler) vppAddDelProxyArpRange(firstIP, lastIP []byte, vrfID uint32, isAdd bool) error {
    71  	validateIPBytes := func(b []byte) error {
    72  		ip := net.IP(b)
    73  		if ip.To4() == nil {
    74  			return fmt.Errorf("IP bytes %v are not valid IPv4 address", b)
    75  		}
    76  		return nil
    77  	}
    78  	if err := validateIPBytes(firstIP); err != nil {
    79  		return fmt.Errorf("bad first IP: %v", err)
    80  	}
    81  	if err := validateIPBytes(lastIP); err != nil {
    82  		return fmt.Errorf("bad last IP: %v", err)
    83  	}
    84  
    85  	proxy := vpp_arp.ProxyArp{
    86  		TableID: vrfID,
    87  	}
    88  	copy(proxy.Low[:], firstIP)
    89  	copy(proxy.Hi[:], lastIP)
    90  
    91  	req := &vpp_arp.ProxyArpAddDel{
    92  		IsAdd: isAdd,
    93  		Proxy: proxy,
    94  	}
    95  
    96  	reply := &vpp_arp.ProxyArpAddDelReply{}
    97  	if err := h.callsChannel.SendRequest(req).ReceiveReply(reply); err != nil {
    98  		return err
    99  	}
   100  
   101  	h.log.Debugf("proxy arp range: %v - %v (vrf: %d) added: %v", proxy.Low, proxy.Hi, proxy.TableID, isAdd)
   102  
   103  	return nil
   104  }