54 lines
1.1 KiB
Go
54 lines
1.1 KiB
Go
package routing
|
|
|
|
import (
|
|
"net"
|
|
)
|
|
|
|
func findSubnetsToAdd(oldSubnets, newSubnets []net.IPNet) (subnetsToAdd []net.IPNet) {
|
|
for _, newSubnet := range newSubnets {
|
|
found := false
|
|
for _, oldSubnet := range oldSubnets {
|
|
if subnetsAreEqual(oldSubnet, newSubnet) {
|
|
found = true
|
|
break
|
|
}
|
|
}
|
|
if !found {
|
|
subnetsToAdd = append(subnetsToAdd, newSubnet)
|
|
}
|
|
}
|
|
return subnetsToAdd
|
|
}
|
|
|
|
func findSubnetsToRemove(oldSubnets, newSubnets []net.IPNet) (subnetsToRemove []net.IPNet) {
|
|
for _, oldSubnet := range oldSubnets {
|
|
found := false
|
|
for _, newSubnet := range newSubnets {
|
|
if subnetsAreEqual(oldSubnet, newSubnet) {
|
|
found = true
|
|
break
|
|
}
|
|
}
|
|
if !found {
|
|
subnetsToRemove = append(subnetsToRemove, oldSubnet)
|
|
}
|
|
}
|
|
return subnetsToRemove
|
|
}
|
|
|
|
func subnetsAreEqual(a, b net.IPNet) bool {
|
|
return a.IP.Equal(b.IP) && a.Mask.String() == b.Mask.String()
|
|
}
|
|
|
|
func removeSubnetFromSubnets(subnets []net.IPNet, subnet net.IPNet) []net.IPNet {
|
|
L := len(subnets)
|
|
for i := range subnets {
|
|
if subnetsAreEqual(subnet, subnets[i]) {
|
|
subnets[i] = subnets[L-1]
|
|
subnets = subnets[:L-1]
|
|
break
|
|
}
|
|
}
|
|
return subnets
|
|
}
|