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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 leasetime
import (
"errors"
"time"
"github.com/coredhcp/coredhcp/handler"
"github.com/coredhcp/coredhcp/logger"
"github.com/coredhcp/coredhcp/plugins"
"github.com/insomniacslk/dhcp/dhcpv4"
)
// Plugin wraps plugin registration information
var Plugin = plugins.Plugin{
Name: "lease_time",
// currently not supported for DHCPv6
Setup6: nil,
Setup4: setup4,
}
var (
log = logger.GetLogger("plugins/lease_time")
v4LeaseTime time.Duration
)
// Handler4 handles DHCPv4 packets for the lease_time plugin.
func Handler4(req, resp *dhcpv4.DHCPv4) (*dhcpv4.DHCPv4, bool) {
if req.OpCode != dhcpv4.OpcodeBootRequest {
return resp, false
}
// Set lease time unless it has already been set
if !resp.Options.Has(dhcpv4.OptionIPAddressLeaseTime) {
resp.Options.Update(dhcpv4.OptIPAddressLeaseTime(v4LeaseTime))
}
return resp, false
}
func setup4(args ...string) (handler.Handler4, error) {
log.Print("loading `lease_time` plugin for DHCPv4")
if len(args) < 1 {
log.Error("No default lease time provided")
return nil, errors.New("lease_time failed to initialize")
}
leaseTime, err := time.ParseDuration(args[0])
if err != nil {
log.Errorf("invalid duration: %v", args[0])
return nil, errors.New("lease_time failed to initialize")
}
v4LeaseTime = leaseTime
return Handler4, nil
}
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