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

     1  // Copyright (c) 2021 PANTHEON.tech
     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_dhcp "go.ligato.io/vpp-agent/v3/plugins/vpp/binapi/vpp2106/dhcp"
    24  	"go.ligato.io/vpp-agent/v3/plugins/vpp/binapi/vpp2106/ip_types"
    25  	l3 "go.ligato.io/vpp-agent/v3/proto/ligato/vpp/l3"
    26  )
    27  
    28  func (h *DHCPProxyHandler) createDeleteDHCPProxy(entry *l3.DHCPProxy, delete bool) (err error) {
    29  	config := &vpp_dhcp.DHCPProxyConfig{
    30  		RxVrfID: entry.RxVrfId,
    31  		IsAdd:   !delete,
    32  	}
    33  	if config.DHCPSrcAddress, err = ipToDHCPAddress(entry.SourceIpAddress); err != nil {
    34  		return errors.Errorf("Invalid source IP address: %q", entry.SourceIpAddress)
    35  	}
    36  	for _, server := range entry.Servers {
    37  		config.ServerVrfID = server.VrfId
    38  		if config.DHCPServer, err = ipToDHCPAddress(server.IpAddress); err != nil {
    39  			return errors.Errorf("Invalid server IP address: %q", server.IpAddress)
    40  		}
    41  		reply := &vpp_dhcp.DHCPProxyConfigReply{}
    42  		if err := h.callsChannel.SendRequest(config).ReceiveReply(reply); err != nil {
    43  			return err
    44  		}
    45  	}
    46  
    47  	return nil
    48  }
    49  
    50  func (h *DHCPProxyHandler) CreateDHCPProxy(entry *l3.DHCPProxy) error {
    51  	return h.createDeleteDHCPProxy(entry, false)
    52  }
    53  
    54  func (h *DHCPProxyHandler) DeleteDHCPProxy(entry *l3.DHCPProxy) error {
    55  	return h.createDeleteDHCPProxy(entry, true)
    56  }
    57  
    58  func ipToDHCPAddress(address string) (dhcpAddr ip_types.Address, err error) {
    59  	netIP := net.ParseIP(address)
    60  	if netIP == nil {
    61  		return ip_types.Address{}, fmt.Errorf("invalid IP: %q", address)
    62  	}
    63  	if ip4 := netIP.To4(); ip4 == nil {
    64  		dhcpAddr.Af = ip_types.ADDRESS_IP6
    65  		var ip6addr ip_types.IP6Address
    66  		copy(ip6addr[:], netIP.To16())
    67  		dhcpAddr.Un.SetIP6(ip6addr)
    68  	} else {
    69  		dhcpAddr.Af = ip_types.ADDRESS_IP4
    70  		var ip4addr ip_types.IP4Address
    71  		copy(ip4addr[:], ip4)
    72  		dhcpAddr.Un.SetIP4(ip4addr)
    73  	}
    74  	return
    75  }