136 lines
3.2 KiB
Go
136 lines
3.2 KiB
Go
package main
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import (
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"fmt"
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"log"
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"math/rand"
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"net"
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"time"
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"github.com/go-ping/ping"
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"github.com/milosgajdos/tenus"
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)
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func init() {
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ZoreideBridge.initializeHierarchy()
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}
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func (b *AbstractBridge) RefreshArp() {
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// we want the program to recover in case of issues
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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 <RefreshARP()>, but Zoreide recovered. ")
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fmt.Println("Error was: ", r)
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}
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}()
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b.GArp = new(Gratuitous)
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var err error
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b.GArp.IP, _, err = net.ParseCIDR(b.BridgeIpCIDR)
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if err != nil {
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log.Println("Error parsing CIDR: ", err.Error())
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}
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b.GArp.IfaceName = b.ExistingInterface
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log.Println("ARP Interface name: ", b.GArp.IfaceName)
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SendGratuitous(b.GArp)
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}
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func (b *AbstractBridge) initializeHierarchy() {
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b.hIerarchyNumber = rand.Int63()
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log.Println("Initialized host number: ", b.hIerarchyNumber)
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}
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func (b *AbstractBridge) configureIpAndBridgeUp() {
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// we want the program to recover in case of issues
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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 <configureIpAndBridgeUp()>, but Zoreide recovered. ")
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fmt.Println("Error was: ", r)
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}
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}()
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// first we check the IP is free. Something weird could have happened in some
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// other server
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brIp, brIpNet, err := net.ParseCIDR(b.BridgeIpCIDR)
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if err != nil {
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log.Println("Error parsing CIDR: ", err.Error())
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}
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br, err := tenus.NewLinkFrom(b.ExistingInterface)
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if err != nil {
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log.Println("Error creating Ethernet Alias: ", err.Error())
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log.Println("Problematic interface: ", b.ExistingInterface)
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}
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if err := br.SetLinkIp(brIp, brIpNet); err != nil {
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log.Println("Error setting UP the IP: ", err.Error())
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} else {
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log.Printf("%s configured with %s\n", b.ExistingInterface, brIp.String())
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}
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// refresh ARP , should not be necessary, but we know, Cisco FA
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b.RefreshArp()
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}
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func (b *AbstractBridge) removeIPandBridgeInt() {
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// we want the program to recover in case of issues
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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 <removeIPandBridgeInt()>, but Zoreide recovered. ")
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fmt.Println("Error was: ", r)
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}
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}()
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br, err := tenus.NewLinkFrom(b.ExistingInterface)
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if err != nil {
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log.Println("Error creating Ethernet Handle: ", err.Error())
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log.Println("Problematic interface: ", b.ExistingInterface)
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}
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brIp, brIpNet, err := net.ParseCIDR(b.BridgeIpCIDR)
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if err != nil {
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log.Println("Error parsing CIDR: ", err.Error())
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}
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if err := br.UnsetLinkIp(brIp, brIpNet); err != nil {
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log.Println("Error setting DOWN the IP: ", err.Error())
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}
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}
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func isActive(bridgeip string) bool {
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log.Println("Check for active IP: ", bridgeip)
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pinger, err := ping.NewPinger(bridgeip)
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if err != nil {
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log.Println("Ping error: " + err.Error())
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}
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// just in case it doesn't stops alone
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defer pinger.Stop()
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pinger.Count = 5
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pinger.Interval = time.Duration(10 * time.Millisecond)
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pinger.Timeout = time.Duration(1 * time.Second)
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pinger.Run() // blocks until finished
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stats := pinger.Statistics()
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log.Println("Ping results for: ", bridgeip)
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log.Printf("%d packet sent, %d packet recv\n", pinger.Count, stats.PacketsRecv)
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log.Println("IsACTIVE: ", stats.PacketsRecv == pinger.Count)
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return stats.PacketsRecv == pinger.Count
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}
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