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// Copyright 2018-present the CoreDHCP Authors. All rights reserved
// This source code is licensed under the MIT license found in the
// LICENSE file in the root directory of this source tree.
package router
import (
"errors"
"net"
"github.com/coredhcp/coredhcp/handler"
"github.com/coredhcp/coredhcp/logger"
"github.com/coredhcp/coredhcp/plugins"
"github.com/insomniacslk/dhcp/dhcpv4"
)
var log = logger.GetLogger("plugins/router")
// Plugin wraps plugin registration information
var Plugin = plugins.Plugin{
Name: "router",
Setup4: setup4,
}
var (
routers []net.IP
)
func setup4(args ...string) (handler.Handler4, error) {
log.Printf("Loaded plugin for DHCPv4.")
if len(args) < 1 {
return nil, errors.New("need at least one router IP address")
}
for _, arg := range args {
router := net.ParseIP(arg)
if router.To4() == nil {
return Handler4, errors.New("expected an router IP address, got: " + arg)
}
routers = append(routers, router)
}
log.Infof("loaded %d router IP addresses.", len(routers))
return Handler4, nil
}
//Handler4 handles DHCPv4 packets for the router plugin
func Handler4(req, resp *dhcpv4.DHCPv4) (*dhcpv4.DHCPv4, bool) {
resp.Options.Update(dhcpv4.OptRouter(routers...))
return resp, false
}
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