d30ff6cfae
Instead of constantly making these updates, let's just remove the year since things are stored in git anyways, and this is not an actual modern legal risk anymore.
108 lines
2.7 KiB
Go
108 lines
2.7 KiB
Go
// Mgmt
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// Copyright (C) James Shubin and the project contributors
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// Written by James Shubin <james@shubin.ca> and the project contributors
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package main
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import (
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"context"
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"fmt"
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"log"
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"net"
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"os"
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"github.com/insomniacslk/dhcp/dhcpv4"
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"github.com/insomniacslk/dhcp/dhcpv4/nclient4"
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)
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const (
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iface = "lo" // loopback for local testing
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address = "127.0.0.1"
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)
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func main() {
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if len(os.Args) < 2 || len(os.Args) > 3 {
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log.Printf("Usage: %s [port] <mac address>", os.Args[0])
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return
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}
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port := string(nclient4.ServerPort) // the default is 67
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if len(os.Args) >= 3 {
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port = os.Args[1]
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}
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hwAddr := os.Args[len(os.Args)-1] // argv[1]
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hw, err := net.ParseMAC(hwAddr)
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if err != nil {
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log.Printf("Invalid mac address: %v", err)
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return
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}
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addr := fmt.Sprintf("%s:%s", address, port)
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log.Printf("Connecting to: %s", addr)
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opts := []nclient4.ClientOpt{}
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{
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opt := nclient4.WithHWAddr(hw)
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opts = append(opts, opt)
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}
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{
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opt := nclient4.WithSummaryLogger()
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opts = append(opts, opt)
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}
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//{
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// opt := nclient4.WithDebugLogger()
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// opts = append(opts, opt)
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//}
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//c, err := nclient4.NewWithConn(conn net.PacketConn, ifaceHWAddr net.HardwareAddr, opts...)
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c, err := nclient4.New(iface, opts...)
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if err != nil {
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log.Printf("Error connecting to server: %v", err)
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return
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}
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defer func() {
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if err := c.Close(); err != nil {
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log.Printf("Error closing client: %v", err)
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}
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}()
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modifiers := []dhcpv4.Modifier{}
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//{
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// mod := dhcpv4.WithYourIP(net.ParseIP(?))
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// modifiers = append(modifiers, mod)
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//}
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//{
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// mod := dhcpv4.WithClientIP(net.ParseIP(?))
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// modifiers = append(modifiers, mod)
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//}
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// TODO: add modifiers
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log.Printf("Requesting...")
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ctx := context.Background() // TODO: add to ^C handler
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lease, err := c.Request(ctx, modifiers...) // (lease *Lease, err error)
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if err != nil {
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log.Printf("Error requesting from server: %v", err)
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return
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}
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// Show the results of the D-O-R-A exchange.
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log.Printf("Offer: %+v", lease.Offer)
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log.Printf("Ack: %+v", lease.ACK)
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log.Printf("Done!")
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}
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