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|
package xt
import (
"net"
"github.com/google/nftables/alignedbuff"
)
type ConntrackFlags uint16
const (
ConntrackState ConntrackFlags = 1 << iota
ConntrackProto
ConntrackOrigSrc
ConntrackOrigDst
ConntrackReplSrc
ConntrackReplDst
ConntrackStatus
ConntrackExpires
ConntrackOrigSrcPort
ConntrackOrigDstPort
ConntrackReplSrcPort
ConntrackReplDstPrt
ConntrackDirection
ConntrackStateAlias
)
type ConntrackMtinfoBase struct {
OrigSrcAddr net.IP
OrigSrcMask net.IPMask
OrigDstAddr net.IP
OrigDstMask net.IPMask
ReplSrcAddr net.IP
ReplSrcMask net.IPMask
ReplDstAddr net.IP
ReplDstMask net.IPMask
ExpiresMin uint32
ExpiresMax uint32
L4Proto uint16
OrigSrcPort uint16
OrigDstPort uint16
ReplSrcPort uint16
ReplDstPort uint16
MatchFlags uint16
InvertFlags uint16
}
// See https://elixir.bootlin.com/linux/v5.17.7/source/include/uapi/linux/netfilter/xt_conntrack.h#L38
type ConntrackMtinfo1 struct {
ConntrackMtinfoBase
StateMask uint8
StatusMask uint8
}
// See https://elixir.bootlin.com/linux/v5.17.7/source/include/uapi/linux/netfilter/xt_conntrack.h#L51
type ConntrackMtinfo2 struct {
ConntrackMtinfoBase
StateMask uint16
StatusMask uint16
}
// See https://elixir.bootlin.com/linux/v5.17.7/source/include/uapi/linux/netfilter/xt_conntrack.h#L64
type ConntrackMtinfo3 struct {
ConntrackMtinfo2
OrigSrcPortHigh uint16
OrigDstPortHigh uint16
ReplSrcPortHigh uint16
ReplDstPortHigh uint16
}
func (x *ConntrackMtinfoBase) marshalAB(fam TableFamily, rev uint32, ab *alignedbuff.AlignedBuff) error {
if err := putIPv46(ab, fam, x.OrigSrcAddr); err != nil {
return err
}
if err := putIPv46Mask(ab, fam, x.OrigSrcMask); err != nil {
return err
}
if err := putIPv46(ab, fam, x.OrigDstAddr); err != nil {
return err
}
if err := putIPv46Mask(ab, fam, x.OrigDstMask); err != nil {
return err
}
if err := putIPv46(ab, fam, x.ReplSrcAddr); err != nil {
return err
}
if err := putIPv46Mask(ab, fam, x.ReplSrcMask); err != nil {
return err
}
if err := putIPv46(ab, fam, x.ReplDstAddr); err != nil {
return err
}
if err := putIPv46Mask(ab, fam, x.ReplDstMask); err != nil {
return err
}
ab.PutUint32(x.ExpiresMin)
ab.PutUint32(x.ExpiresMax)
ab.PutUint16(x.L4Proto)
ab.PutUint16(x.OrigSrcPort)
ab.PutUint16(x.OrigDstPort)
ab.PutUint16(x.ReplSrcPort)
ab.PutUint16(x.ReplDstPort)
ab.PutUint16(x.MatchFlags)
ab.PutUint16(x.InvertFlags)
return nil
}
func (x *ConntrackMtinfoBase) unmarshalAB(fam TableFamily, rev uint32, ab *alignedbuff.AlignedBuff) error {
var err error
if x.OrigSrcAddr, err = iPv46(ab, fam); err != nil {
return err
}
if x.OrigSrcMask, err = iPv46Mask(ab, fam); err != nil {
return err
}
if x.OrigDstAddr, err = iPv46(ab, fam); err != nil {
return err
}
if x.OrigDstMask, err = iPv46Mask(ab, fam); err != nil {
return err
}
if x.ReplSrcAddr, err = iPv46(ab, fam); err != nil {
return err
}
if x.ReplSrcMask, err = iPv46Mask(ab, fam); err != nil {
return err
}
if x.ReplDstAddr, err = iPv46(ab, fam); err != nil {
return err
}
if x.ReplDstMask, err = iPv46Mask(ab, fam); err != nil {
return err
}
if x.ExpiresMin, err = ab.Uint32(); err != nil {
return err
}
if x.ExpiresMax, err = ab.Uint32(); err != nil {
return err
}
if x.L4Proto, err = ab.Uint16(); err != nil {
return err
}
if x.OrigSrcPort, err = ab.Uint16(); err != nil {
return err
}
if x.OrigDstPort, err = ab.Uint16(); err != nil {
return err
}
if x.ReplSrcPort, err = ab.Uint16(); err != nil {
return err
}
if x.ReplDstPort, err = ab.Uint16(); err != nil {
return err
}
if x.MatchFlags, err = ab.Uint16(); err != nil {
return err
}
if x.InvertFlags, err = ab.Uint16(); err != nil {
return err
}
return nil
}
func (x *ConntrackMtinfo1) marshal(fam TableFamily, rev uint32) ([]byte, error) {
ab := alignedbuff.New()
if err := x.ConntrackMtinfoBase.marshalAB(fam, rev, &ab); err != nil {
return nil, err
}
ab.PutUint8(x.StateMask)
ab.PutUint8(x.StatusMask)
return ab.Data(), nil
}
func (x *ConntrackMtinfo1) unmarshal(fam TableFamily, rev uint32, data []byte) error {
ab := alignedbuff.NewWithData(data)
var err error
if err = x.ConntrackMtinfoBase.unmarshalAB(fam, rev, &ab); err != nil {
return err
}
if x.StateMask, err = ab.Uint8(); err != nil {
return err
}
if x.StatusMask, err = ab.Uint8(); err != nil {
return err
}
return nil
}
func (x *ConntrackMtinfo2) marshalAB(fam TableFamily, rev uint32, ab *alignedbuff.AlignedBuff) error {
if err := x.ConntrackMtinfoBase.marshalAB(fam, rev, ab); err != nil {
return err
}
ab.PutUint16(x.StateMask)
ab.PutUint16(x.StatusMask)
return nil
}
func (x *ConntrackMtinfo2) marshal(fam TableFamily, rev uint32) ([]byte, error) {
ab := alignedbuff.New()
if err := x.marshalAB(fam, rev, &ab); err != nil {
return nil, err
}
return ab.Data(), nil
}
func (x *ConntrackMtinfo2) unmarshalAB(fam TableFamily, rev uint32, ab *alignedbuff.AlignedBuff) error {
var err error
if err = x.ConntrackMtinfoBase.unmarshalAB(fam, rev, ab); err != nil {
return err
}
if x.StateMask, err = ab.Uint16(); err != nil {
return err
}
if x.StatusMask, err = ab.Uint16(); err != nil {
return err
}
return nil
}
func (x *ConntrackMtinfo2) unmarshal(fam TableFamily, rev uint32, data []byte) error {
ab := alignedbuff.NewWithData(data)
var err error
if err = x.unmarshalAB(fam, rev, &ab); err != nil {
return err
}
return nil
}
func (x *ConntrackMtinfo3) marshal(fam TableFamily, rev uint32) ([]byte, error) {
ab := alignedbuff.New()
if err := x.ConntrackMtinfo2.marshalAB(fam, rev, &ab); err != nil {
return nil, err
}
ab.PutUint16(x.OrigSrcPortHigh)
ab.PutUint16(x.OrigDstPortHigh)
ab.PutUint16(x.ReplSrcPortHigh)
ab.PutUint16(x.ReplDstPortHigh)
return ab.Data(), nil
}
func (x *ConntrackMtinfo3) unmarshal(fam TableFamily, rev uint32, data []byte) error {
ab := alignedbuff.NewWithData(data)
var err error
if err = x.ConntrackMtinfo2.unmarshalAB(fam, rev, &ab); err != nil {
return err
}
if x.OrigSrcPortHigh, err = ab.Uint16(); err != nil {
return err
}
if x.OrigDstPortHigh, err = ab.Uint16(); err != nil {
return err
}
if x.ReplSrcPortHigh, err = ab.Uint16(); err != nil {
return err
}
if x.ReplDstPortHigh, err = ab.Uint16(); err != nil {
return err
}
return nil
}
|
