ofproto/tunnel.h

   1 /* Copyright (c) 2013, 2015 Nicira, Inc.
   2  *
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15
  16 #ifndef TUNNEL_H
  17 #define TUNNEL_H 1
  18
  19 #include <stdbool.h>
  20 #include <stdint.h>
  21 #include "flow.h"
  22
  23 /* Tunnel port emulation layer.
  24  *
  25  * These functions emulate tunnel virtual ports based on the outer
  26  * header information from the kernel. */
  27
  28 struct ovs_action_push_tnl;
  29 struct ofport_dpif;
  30 struct netdev;
  31
  32 void ofproto_tunnel_init(void);
  33 bool tnl_port_reconfigure(const struct ofport_dpif *, const struct netdev *,
  34                           odp_port_t, bool native_tnl, const char name[]);
  35
  36 int tnl_port_add(const struct ofport_dpif *, const struct netdev *,
  37                  odp_port_t odp_port, bool native_tnl, const char name[]);
  38 void tnl_port_del(const struct ofport_dpif *);
  39
  40 const struct ofport_dpif *tnl_port_receive(const struct flow *);
  41 void tnl_wc_init(struct flow *, struct flow_wildcards *);
  42 bool tnl_process_ecn(struct flow *);
  43 odp_port_t tnl_port_send(const struct ofport_dpif *, struct flow *,
  44                          struct flow_wildcards *wc);
  45
  46 /* Returns true if 'flow' should be submitted to tnl_port_receive(). */
  47 static inline bool
  48 tnl_port_should_receive(const struct flow *flow)
  49 {
  50     return flow->tunnel.ip_dst != 0;
  51 }
  52
  53 int tnl_port_build_header(const struct ofport_dpif *ofport,
  54                           const struct flow *tnl_flow,
  55                           const struct eth_addr dmac,
  56                           const struct eth_addr smac,
  57                           ovs_be32 ip_src, struct ovs_action_push_tnl *data);
  58
  59 #endif /* tunnel.h */