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utils.go
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/
utils.go
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// Copyright (C) 2020-2021, IrineSistiana
//
// This file is part of mosdns.
//
// mosdns is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// mosdns is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package nftset_utils
import (
"net"
)
func broadcastAddr(n *net.IPNet) net.IP {
broadcast := make(net.IP, len(n.IP))
copy(broadcast, n.IP)
for i := 0; i < len(n.IP); i++ {
broadcast[i] = n.IP[i] | ^n.Mask[i]
}
return broadcast
}
func nextIP(ip net.IP) net.IP {
res := make([]byte, len(ip))
copy(res, ip)
for i := len(res) - 1; i >= 0; i-- {
res[i]++
if res[i] != 0 {
break
}
}
return res
}