include/openvswitch/tunnel.h

   1 /*
   2  * Copyright (c) 2008, 2009, 2010, 2011 Nicira, Inc.
   3  *
   4  * This file is offered under your choice of two licenses: Apache 2.0 or GNU
   5  * GPL 2.0 or later.  The permission statements for each of these licenses is
   6  * given below.  You may license your modifications to this file under either
   7  * of these licenses or both.  If you wish to license your modifications under
   8  * only one of these licenses, delete the permission text for the other
   9  * license.
  10  *
  11  * ----------------------------------------------------------------------
  12  * Licensed under the Apache License, Version 2.0 (the "License");
  13  * you may not use this file except in compliance with the License.
  14  * You may obtain a copy of the License at:
  15  *
  16  *     http://www.apache.org/licenses/LICENSE-2.0
  17  *
  18  * Unless required by applicable law or agreed to in writing, software
  19  * distributed under the License is distributed on an "AS IS" BASIS,
  20  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  21  * See the License for the specific language governing permissions and
  22  * limitations under the License.
  23  * ----------------------------------------------------------------------
  24  * This program is free software; you can redistribute it and/or modify
  25  * it under the terms of the GNU General Public License as published by
  26  * the Free Software Foundation; either version 2 of the License, or
  27  * (at your option) any later version.
  28  *
  29  * This program is distributed in the hope that it will be useful,
  30  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  31  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  32  * GNU General Public License for more details.
  33  *
  34  * You should have received a copy of the GNU General Public License along
  35  * with this program; if not, write to the Free Software Foundation, Inc.,
  36  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  37  * ----------------------------------------------------------------------
  38  */
  39
  40 #ifndef OPENVSWITCH_TUNNEL_H
  41 #define OPENVSWITCH_TUNNEL_H 1
  42
  43 #include <linux/types.h>
  44 #include <linux/openvswitch.h>
  45
  46 /* OVS_VPORT_ATTR_OPTIONS attributes for tunnels.
  47  *
  48  * OVS_TUNNEL_ATTR_FLAGS and OVS_TUNNEL_ATTR_DST_IPV4 are required.  All other
  49  * attributes are optional.
  50  */
  51 enum {
  52         OVS_TUNNEL_ATTR_UNSPEC,
  53         OVS_TUNNEL_ATTR_FLAGS,    /* 32-bit TNL_F_*. */
  54         OVS_TUNNEL_ATTR_DST_IPV4, /* IPv4 destination address. */
  55         OVS_TUNNEL_ATTR_SRC_IPV4, /* IPv4 source address. */
  56         OVS_TUNNEL_ATTR_OUT_KEY,  /* __be64 key to use on output. */
  57         OVS_TUNNEL_ATTR_IN_KEY,   /* __be64 key to match on input. */
  58         OVS_TUNNEL_ATTR_TOS,      /* 8-bit TOS value. */
  59         OVS_TUNNEL_ATTR_TTL,      /* 8-bit TTL value. */
  60         __OVS_TUNNEL_ATTR_MAX
  61 };
  62
  63 #define OVS_TUNNEL_ATTR_MAX (__OVS_TUNNEL_ATTR_MAX - 1)
  64
  65 #define TNL_F_CSUM              (1 << 0) /* Checksum packets. */
  66 #define TNL_F_TOS_INHERIT       (1 << 1) /* Inherit ToS from inner packet. */
  67 #define TNL_F_TTL_INHERIT       (1 << 2) /* Inherit TTL from inner packet. */
  68 #define TNL_F_DF_INHERIT        (1 << 3) /* Inherit DF bit from inner packet. */
  69 #define TNL_F_DF_DEFAULT        (1 << 4) /* Set DF bit if inherit off or
  70                                           * not IP. */
  71 #define TNL_F_PMTUD             (1 << 5) /* Enable path MTU discovery. */
  72 #define TNL_F_HDR_CACHE         (1 << 6) /* Enable tunnel header caching. */
  73 #define TNL_F_IPSEC             (1 << 7) /* Traffic is IPsec encrypted. */
  74
  75 #endif /* openvswitch/tunnel.h */