127 lines
2.7 KiB
Go
127 lines
2.7 KiB
Go
package main
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import (
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"fmt"
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"log"
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"net"
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"slices"
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"sort"
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"strconv"
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"time"
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)
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func (mip *AbstractMulticast) AddUniqueAndSort(hier int64) {
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if slices.Contains(mip.HierarchyArray, hier) {
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log.Println("Element already in the array:", hier)
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} else {
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mip.HierarchyArray = append(mip.HierarchyArray, hier)
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sort.Slice(mip.HierarchyArray, func(i, j int) bool { return mip.HierarchyArray[i] < mip.HierarchyArray[j] })
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log.Println(mip.HierarchyArray)
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}
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}
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func (mip *AbstractMulticast) IsAlpha(hier int64) bool {
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return mip.HierarchyArray[0] == hier
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}
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func (mip *AbstractMulticast) WriteNumberToMulticast(br AbstractBridge) {
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defer func() {
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if r := recover(); r != nil {
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fmt.Println("An error happened in <WriteNumberToMulticast()>, but Zoreide recovered. ")
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fmt.Println("Error was: ", r)
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}
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}()
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log.Println("Initiating ticker")
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bstNumber := fmt.Sprintf("%d", br.hIerarchyNumber)
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for range time.Tick(1 * time.Second) {
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_, err := mip.Wconn.Write([]byte(bstNumber))
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if err != nil {
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log.Println("Cannot write to multicast:" + err.Error())
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}
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}
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}
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func (mip *AbstractMulticast) ReadNumberFromMulticast() {
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log.Println("Initiating reader")
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buffer := make([]byte, mip.MaxDatagramSize)
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// Loop forever reading from the socket
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for {
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_, _, err := mip.Rconn.ReadFromUDP(buffer)
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if err != nil {
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log.Println("ReadFromUDP failed:", err)
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}
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BstChannel <- string(buffer)
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}
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}
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func (b *AbstractBridge) HierarchyReLocator(entity AbstractMulticast) {
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log.Println("Inizializing Descalator")
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for bstNumber := range BstChannel {
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brdNumber, err := strconv.ParseInt(bstNumber, 10, 64)
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if err != nil {
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log.Println("Garbage received on multicast: ", bstNumber)
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log.Println("Cannot convert to int64:", err.Error())
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continue
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} else {
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log.Println("Adding received:", brdNumber)
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entity.AddUniqueAndSort(brdNumber)
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}
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brIp, _, err := net.ParseCIDR(b.BridgeIpCIDR)
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if err != nil {
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log.Println(err.Error())
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}
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// finished feeding the new number
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// if Alpha:
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if entity.IsAlpha(b.hIerarchyNumber) {
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if isActive(brIp.String()) {
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log.Println("Still ALPHA. This is ok.")
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} else {
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log.Println("I'm the new ALPHA! Get out my path, losers!")
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b.configureIpAndBridgeUp()
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log.Println("Ip is active: ", isActive(brIp.String()))
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}
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} else {
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log.Println("GULP! There is a bigger one, better descalating")
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if isActive(brIp.String()) {
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b.removeIPandBridgeInt()
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}
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}
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}
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}
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func (b *AbstractBridge) WaitAndClean(entity AbstractMulticast) {
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log.Println("Inizializing Escalator")
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for {
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entity.AddUniqueAndSort(b.hIerarchyNumber)
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pollTime := len(entity.HierarchyArray) + 1
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time.Sleep(time.Duration(pollTime) * time.Second)
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// svuotare l'array
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entity.HierarchyArray = entity.HierarchyArray[:0]
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}
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}
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