// Copyright (c) 2016-2025 Tigera, Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package nfnetlink

type NflogPacketHeader struct {
	HwProtocol int
	Hook       int
}

type NflogPacketTimestamp struct {
	Sec  uint64
	Usec uint64
}

type NflogL4Info struct {
	Port int
	Id   int
	Type int
	Code int
}

type NflogPacketTuple struct {
	Src   [16]byte
	Dst   [16]byte
	Proto int
	L4Src NflogL4Info
	L4Dst NflogL4Info
}

// NflogPrefix stores the "nflog-prefix" of a NFLOG packet.
// NFLOG prefixes are 64 characters long. We keep them as a byte array to save
// the allocation that comes with converting it to a string.
type NflogPrefix struct {
	Prefix  [64]byte
	Len     int
	Packets int
	Bytes   int
}

func (np *NflogPrefix) Equals(cmp *NflogPrefix) bool {
	return np.Prefix == cmp.Prefix
}

type NflogPacket struct {
	Header        NflogPacketHeader
	Mark          int
	Timestamp     NflogPacketTimestamp
	Prefix        NflogPrefix
	Gid           int
	Tuple         NflogPacketTuple
	Bytes         int
	IsDNAT        bool
	OriginalTuple CtTuple
}

type NflogPacketAggregate struct {
	Tuple    NflogPacketTuple
	Prefixes []NflogPrefix

	// If DNAT then original tuple is also included. This is a CtTuple since it is derived from a CT hook in nflog.
	IsDNAT        bool
	OriginalTuple CtTuple
}