ofproto/netflow.h

   1 /*
   2  * Copyright (c) 2008, 2009 Nicira Networks.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #ifndef NETFLOW_H
  18 #define NETFLOW_H 1
  19
  20 #include "flow.h"
  21 #include "svec.h"
  22
  23 static const int NF_ACTIVE_TIMEOUT_DEFAULT = 600;
  24
  25 struct ofexpired;
  26
  27 struct netflow_options {
  28     struct svec collectors;
  29     uint8_t engine_type;
  30     uint8_t engine_id;
  31     int active_timeout;
  32     bool add_id_to_iface;
  33 };
  34
  35 enum netflow_output_ports {
  36     NF_OUT_FLOOD = UINT16_MAX,
  37     NF_OUT_MULTI = UINT16_MAX - 1,
  38     NF_OUT_DROP = UINT16_MAX - 2
  39 };
  40
  41 struct netflow_flow {
  42     long long int last_expired;   /* Time this flow last timed out. */
  43     long long int created;        /* Time flow was created since time out. */
  44
  45     uint64_t packet_count_off;    /* Packet count at last time out. */
  46     uint64_t byte_count_off;      /* Byte count at last time out. */
  47
  48     uint16_t output_iface;        /* Output interface index. */
  49     uint8_t ip_tos;               /* Last-seen IP type-of-service. */
  50     uint8_t tcp_flags;            /* Bitwise-OR of all TCP flags seen. */
  51 };
  52
  53 struct netflow *netflow_create(void);
  54 void netflow_destroy(struct netflow *);
  55 int netflow_set_options(struct netflow *, const struct netflow_options *);
  56 void netflow_expire(struct netflow *, struct netflow_flow *,
  57                     struct ofexpired *);
  58 void netflow_run(struct netflow *);
  59
  60 void netflow_flow_clear(struct netflow_flow *);
  61 void netflow_flow_update_time(struct netflow *, struct netflow_flow *,
  62                               long long int used);
  63 void netflow_flow_update_flags(struct netflow_flow *, uint8_t ip_tos,
  64                                uint8_t tcp_flags);
  65 bool netflow_active_timeout_expired(struct netflow *, struct netflow_flow *);
  66
  67 #endif /* netflow.h */