a7624a2bf9
Done with: ack '2022+' -l | xargs sed -i -e 's/2022+/2023+/g' Checked manually with: git add -p Hello to future James from 2024, and Happy Hacking!
108 lines
2.7 KiB
Go
108 lines
2.7 KiB
Go
// Mgmt
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// Copyright (C) 2013-2023+ 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 <http://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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offer, ack, err := c.Request(ctx, modifiers...) // (offer, ack *dhcpv4.DHCPv4, 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", offer)
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log.Printf("Ack: %+v", ack)
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log.Printf("Done!")
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}
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