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// GNU GENERAL PUBLIC LICENSE Version 3, 29 June 2007
// Copyright (c) 2023 WIT.COM, Inc.
// This is a control panel for DNS
package main
import (
"fmt"
"strings"
"sort"
"strconv"
"runtime"
"time"
"embed"
"go.wit.com/log"
"go.wit.com/gui/gui"
"go.wit.com/gui/debugger"
"github.com/miekg/dns"
)
//go:embed plugins/*.so
var resToolkit embed.FS
func main() {
// parsedown()
// initialize the maps to track IP addresses and network interfaces
me.ipmap = make(map[string]*IPtype)
me.dnsmap = make(map[string]*IPtype)
me.ifmap = make(map[int]*IFtype)
me.nsmap = make(map[string]string)
// initialize maps for the returned DNS records
me.ipv4s = make(map[string]dns.RR)
me.ipv6s = make(map[string]dns.RR)
// send all log() output to a file in /tmp
log.SetTmp()
me.myGui = gui.New().Default()
log.Sleep(me.artificialSleep)
setupControlPanelWindow()
if debugger.ArgDebug() {
log.Sleep(2)
debugger.DebugWindow(me.myGui)
}
// forever monitor for network and dns changes
log.Sleep(me.artificialSleep)
checkNetworkChanges()
}
/*
Poll for changes to the networking settings
*/
/* https://github.com/robfig/cron/blob/master/cron.go
// Run the cron scheduler, or no-op if already running.
func (c *Cron) Run() {
c.runningMu.Lock()
if c.running {
c.runningMu.Unlock()
return
}
c.running = true
c.runningMu.Unlock()
c.run()
}
// run the scheduler.. this is private just due to the need to synchronize
// access to the 'running' state variable.
func (c *Cron) run() {
c.logger.Info("start")
*/
func checkNetworkChanges() {
var lastLocal time.Time = time.Now()
var lastDNS time.Time = time.Now()
timer2 := time.NewTimer(time.Second)
go func() {
<-timer2.C
fmt.Println("Timer 2 fired")
}()
for {
time.Sleep(me.ttl.Duration)
if (time.Since(lastLocal) > me.localSleep) {
if (runtime.GOOS == "linux") {
duration := timeFunction(linuxLoop)
s := fmt.Sprint(duration)
me.LocalSpeedActual.SetText(s)
} else {
// TODO: make windows and macos diagnostics
log.Warn("Windows and MacOS don't work yet")
}
lastLocal = time.Now()
}
if (time.Since(lastDNS) > me.dnsTtl.Duration) {
DNSloop()
lastDNS = time.Now()
}
/*
stop2 := timer2.Stop()
if stop2 {
fmt.Println("Timer 2 stopped")
}
*/
}
}
// run this on each timeout
func DNSloop() {
duration := timeFunction(dnsTTL)
log.Info("dnsTTL() execution Time: ", duration)
var s, newSpeed string
if (duration > 5000 * time.Millisecond ) {
newSpeed = "VERY BAD"
suggestProcDebugging()
} else if (duration > 2000 * time.Millisecond ) {
newSpeed = "BAD"
suggestProcDebugging()
} else if (duration > 500 * time.Millisecond ) {
suggestProcDebugging()
newSpeed = "SLOW"
} else if (duration > 100 * time.Millisecond ) {
newSpeed = "OK"
if (me.fixProc != nil) {
// me.fixProc.Disable()
}
} else {
newSpeed = "FAST"
if (me.fixProc != nil) {
// me.fixProc.Disable()
}
}
if (newSpeed != me.DnsSpeedLast) {
log.Log(CHANGE, "dns lookup speed changed =", newSpeed)
log.Log(CHANGE, "dnsTTL() execution Time: ", duration)
me.DnsSpeed.SetText(newSpeed)
me.DnsSpeedLast = newSpeed
}
s = fmt.Sprint(duration)
me.DnsSpeedActual.SetText(s)
}
// This checks for changes to the network settings
// and verifies that DNS is working or not working
func dnsTTL() {
updateDNS()
}
func linuxLoop() {
me.changed = false
log.Log(NET, "FQDN =", me.fqdn.GetText())
duration := timeFunction(getHostname)
log.Info("getHostname() execution Time: ", duration, "me.changed =", me.changed)
duration = timeFunction(scanInterfaces)
log.Log(NET, "scanInterfaces() execution Time: ", duration)
for i, t := range me.ifmap {
log.Log(NET, strconv.Itoa(i) + " iface = " + t.iface.Name)
}
var aaaa []string
aaaa = dhcpAAAA()
var all string
for _, s := range aaaa {
log.Log(NET, "my actual AAAA = ",s)
all += s + "\n"
}
// me.IPv6.SetText(all)
if (me.changed) {
stamp := time.Now().Format("2006/01/02 15:04:05")
log.Log(CHANGE, "Network things changed on", stamp)
duration := timeFunction(updateDNS)
log.Log(CHANGE, "updateDNS() execution Time: ", duration)
}
/*
processName := getProcessNameByPort(53)
fmt.Println("Process with port 53:", processName)
commPath := filepath.Join("/proc", proc.Name(), "comm")
comm, err := ioutil.ReadFile(commPath)
if err != nil {
return "", err // Error reading the process name
}
return strings.TrimSpace(string(comm)), nil
*/
}
/*
// Example usage
duration := timeFunction(FunctionToTime)
log.Println("Execution Time: ", duration)
*/
// timeFunction takes a function as an argument and returns the execution time.
func timeFunction(f func()) time.Duration {
startTime := time.Now() // Record the start time
f() // Execute the function
return time.Since(startTime) // Calculate the elapsed time
}
// sortLines takes a string, splits it on newlines, sorts the lines,
// and rejoins them with newlines.
func sortLines(input string) string {
lines := strings.Split(input, "\n")
// Trim leading and trailing whitespace from each line
for i, line := range lines {
lines[i] = strings.TrimSpace(line)
}
sort.Strings(lines)
tmp := strings.Join(lines, "\n")
tmp = strings.TrimLeft(tmp, "\n")
tmp = strings.TrimRight(tmp, "\n")
return tmp
}
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