58 lines
1.5 KiB
Go
58 lines
1.5 KiB
Go
// Copyright 2018-present the CoreDHCP Authors. All rights reserved
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// This source code is licensed under the MIT license found in the
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// LICENSE file in the root directory of this source tree.
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package leasetime
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import (
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"errors"
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"time"
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"github.com/coredhcp/coredhcp/handler"
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"github.com/coredhcp/coredhcp/logger"
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"github.com/coredhcp/coredhcp/plugins"
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"github.com/insomniacslk/dhcp/dhcpv4"
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)
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// Plugin wraps plugin registration information
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var Plugin = plugins.Plugin{
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Name: "lease_time",
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// currently not supported for DHCPv6
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Setup6: nil,
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Setup4: setup4,
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}
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var (
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log = logger.GetLogger("plugins/lease_time")
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v4LeaseTime time.Duration
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)
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// Handler4 handles DHCPv4 packets for the lease_time plugin.
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func Handler4(req, resp *dhcpv4.DHCPv4) (*dhcpv4.DHCPv4, bool) {
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if req.OpCode != dhcpv4.OpcodeBootRequest {
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return resp, false
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}
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// Set lease time unless it has already been set
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if !resp.Options.Has(dhcpv4.OptionIPAddressLeaseTime) {
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resp.Options.Update(dhcpv4.OptIPAddressLeaseTime(v4LeaseTime))
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}
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return resp, false
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}
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func setup4(args ...string) (handler.Handler4, error) {
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log.Print("loading `lease_time` plugin for DHCPv4")
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if len(args) < 1 {
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log.Error("No default lease time provided")
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return nil, errors.New("lease_time failed to initialize")
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}
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leaseTime, err := time.ParseDuration(args[0])
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if err != nil {
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log.Errorf("invalid duration: %v", args[0])
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return nil, errors.New("lease_time failed to initialize")
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}
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v4LeaseTime = leaseTime
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return Handler4, nil
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}
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