lib/netdev-native-tnl.h

   1 /*
   2  * Copyright (c) 2010, 2011, 2013, 2015 Nicira, Inc.
   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 NETDEV_VPORT_NATIVE_TNL_H
  18 #define NETDEV_VPORT_NATIVE_TNL_H 1
  19
  20 #include <stdbool.h>
  21 #include <stddef.h>
  22 #include "compiler.h"
  23 #include "dp-packet.h"
  24 #include "packets.h"
  25 #include "unixctl.h"
  26
  27 struct netdev;
  28 struct ovs_action_push_tnl;
  29 struct netdev_tnl_build_header_params;
  30
  31 int
  32 netdev_gre_build_header(const struct netdev *netdev,
  33                         struct ovs_action_push_tnl *data,
  34                         const struct netdev_tnl_build_header_params *params);
  35
  36 void
  37 netdev_gre_push_header(struct dp_packet *packet,
  38                        const struct ovs_action_push_tnl *data);
  39 struct dp_packet *
  40 netdev_gre_pop_header(struct dp_packet *packet);
  41
  42 void
  43 netdev_tnl_push_udp_header(struct dp_packet *packet,
  44                            const struct ovs_action_push_tnl *data);
  45 int
  46 netdev_geneve_build_header(const struct netdev *netdev,
  47                            struct ovs_action_push_tnl *data,
  48                            const struct netdev_tnl_build_header_params *params);
  49
  50 struct dp_packet *
  51 netdev_geneve_pop_header(struct dp_packet *packet);
  52
  53 int
  54 netdev_vxlan_build_header(const struct netdev *netdev,
  55                           struct ovs_action_push_tnl *data,
  56                           const struct netdev_tnl_build_header_params *params);
  57
  58 struct dp_packet *
  59 netdev_vxlan_pop_header(struct dp_packet *packet);
  60
  61 static inline bool
  62 netdev_tnl_is_header_ipv6(const void *header)
  63 {
  64     const struct eth_header *eth;
  65     eth = header;
  66     return eth->eth_type == htons(ETH_TYPE_IPV6);
  67 }
  68
  69 static inline struct ip_header *
  70 netdev_tnl_ip_hdr(void *eth)
  71 {
  72     return (void *)((char *)eth + sizeof (struct eth_header));
  73 }
  74
  75 static inline struct ovs_16aligned_ip6_hdr *
  76 netdev_tnl_ipv6_hdr(void *eth)
  77 {
  78     return (void *)((char *)eth + sizeof (struct eth_header));
  79 }
  80
  81 void *
  82 netdev_tnl_ip_build_header(struct ovs_action_push_tnl *data,
  83                            const struct netdev_tnl_build_header_params *params,
  84                            uint8_t next_proto);
  85
  86 extern uint16_t tnl_udp_port_min;
  87 extern uint16_t tnl_udp_port_max;
  88
  89 static inline ovs_be16
  90 netdev_tnl_get_src_port(struct dp_packet *packet)
  91 {
  92     uint32_t hash;
  93
  94     hash = dp_packet_get_rss_hash(packet);
  95
  96     return htons((((uint64_t) hash * (tnl_udp_port_max - tnl_udp_port_min)) >> 32) +
  97                  tnl_udp_port_min);
  98 }
  99
 100 void *
 101 netdev_tnl_ip_extract_tnl_md(struct dp_packet *packet, struct flow_tnl *tnl,
 102                              unsigned int *hlen);
 103 void *
 104 netdev_tnl_push_ip_header(struct dp_packet *packet,
 105                           const void *header, int size, int *ip_tot_size);
 106 void
 107 netdev_tnl_egress_port_range(struct unixctl_conn *conn, int argc,
 108                              const char *argv[], void *aux OVS_UNUSED);
 109 #endif