flowtable.h

/* Copyright 2014 Andrew Bates
 * 
 * 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. 
 */

#ifndef __FLOWTABLE_H__
#define __FLOWTABLE_H__

#include "hash.h"
#include "netflow.h"

typedef struct flow_entry {
  struct flow_entry *previous;
  struct flow_entry *next;
  struct flowrecord *record;
} flow_entry;

typedef struct flowrecord {
  unsigned int table_id;
  flow_entry flow_cache;
  flow_entry flow_table;
  nf_v5_record_t nf_record;
  ipv4_tuple tuple;
} flowrecord;

typedef struct {
  struct flow_entry *head;
  struct flow_entry *tail;
  unsigned int id;
} flowtable;

flowrecord *flow_retrieve(flowtable *cache, flowtable *table, ipv4_tuple *tuple, unsigned int table_len);
void flow_insert(flowtable *cache, flowtable *table, flowrecord *flowrecord);
void flow_refresh(flowtable *cache, flowrecord *flowrecord);
void flow_expire(nf_peer_t *nf_peer, flowtable *cache, flowtable *table, unsigned long expiration);

#endif