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package xt
import (
"fmt"
"net"
"github.com/google/nftables/alignedbuff"
"golang.org/x/sys/unix"
)
func bool32(ab *alignedbuff.AlignedBuff) (bool, error) {
v, err := ab.Uint32()
if err != nil {
return false, err
}
if v != 0 {
return true, nil
}
return false, nil
}
func putBool32(ab *alignedbuff.AlignedBuff, b bool) {
if b {
ab.PutUint32(1)
return
}
ab.PutUint32(0)
}
func iPv46(ab *alignedbuff.AlignedBuff, fam TableFamily) (net.IP, error) {
ip, err := ab.BytesAligned32(16)
if err != nil {
return nil, err
}
switch fam {
case unix.NFPROTO_IPV4:
return net.IP(ip[:4]), nil
case unix.NFPROTO_IPV6:
return net.IP(ip), nil
default:
return nil, fmt.Errorf("unmarshal IP: unsupported table family %d", fam)
}
}
func iPv46Mask(ab *alignedbuff.AlignedBuff, fam TableFamily) (net.IPMask, error) {
v, err := iPv46(ab, fam)
return net.IPMask(v), err
}
func putIPv46(ab *alignedbuff.AlignedBuff, fam TableFamily, ip net.IP) error {
switch fam {
case unix.NFPROTO_IPV4:
ab.PutBytesAligned32(ip.To4(), 16)
case unix.NFPROTO_IPV6:
ab.PutBytesAligned32(ip.To16(), 16)
default:
return fmt.Errorf("marshal IP: unsupported table family %d", fam)
}
return nil
}
func putIPv46Mask(ab *alignedbuff.AlignedBuff, fam TableFamily, mask net.IPMask) error {
return putIPv46(ab, fam, net.IP(mask))
}
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