lib/conntrack-private.h

   1 /*
   2  * Copyright (c) 2015, 2016 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 CONNTRACK_PRIVATE_H
  18 #define CONNTRACK_PRIVATE_H 1
  19
  20 #include <sys/types.h>
  21 #include <netinet/in.h>
  22 #include <netinet/ip6.h>
  23
  24 #include "conntrack.h"
  25 #include "ct-dpif.h"
  26 #include "openvswitch/hmap.h"
  27 #include "openvswitch/list.h"
  28 #include "openvswitch/types.h"
  29 #include "packets.h"
  30 #include "unaligned.h"
  31
  32 struct ct_addr {
  33     union {
  34         ovs_16aligned_be32 ipv4;
  35         union ovs_16aligned_in6_addr ipv6;
  36         ovs_be32 ipv4_aligned;
  37         struct in6_addr ipv6_aligned;
  38     };
  39 };
  40
  41 struct ct_endpoint {
  42     struct ct_addr addr;
  43     union {
  44         ovs_be16 port;
  45         struct {
  46             ovs_be16 icmp_id;
  47             uint8_t icmp_type;
  48             uint8_t icmp_code;
  49         };
  50     };
  51 };
  52
  53 /* Changes to this structure need to be reflected in conn_key_hash() */
  54 struct conn_key {
  55     struct ct_endpoint src;
  56     struct ct_endpoint dst;
  57
  58     ovs_be16 dl_type;
  59     uint8_t nw_proto;
  60     uint16_t zone;
  61 };
  62
  63 struct conn {
  64     struct conn_key key;
  65     struct conn_key rev_key;
  66     long long expiration;
  67     struct ovs_list exp_node;
  68     struct hmap_node node;
  69     uint32_t mark;
  70     ovs_u128 label;
  71 };
  72
  73 enum ct_update_res {
  74     CT_UPDATE_INVALID,
  75     CT_UPDATE_VALID,
  76     CT_UPDATE_NEW,
  77 };
  78
  79 struct ct_l4_proto {
  80     struct conn *(*new_conn)(struct conntrack_bucket *, struct dp_packet *pkt,
  81                              long long now);
  82     bool (*valid_new)(struct dp_packet *pkt);
  83     enum ct_update_res (*conn_update)(struct conn *conn,
  84                                       struct conntrack_bucket *,
  85                                       struct dp_packet *pkt, bool reply,
  86                                       long long now);
  87     void (*conn_get_protoinfo)(const struct conn *,
  88                                struct ct_dpif_protoinfo *);
  89 };
  90
  91 extern struct ct_l4_proto ct_proto_tcp;
  92 extern struct ct_l4_proto ct_proto_other;
  93 extern struct ct_l4_proto ct_proto_icmp4;
  94 extern struct ct_l4_proto ct_proto_icmp6;
  95
  96 extern long long ct_timeout_val[];
  97
  98 static inline void
  99 conn_init_expiration(struct conntrack_bucket *ctb, struct conn *conn,
 100                         enum ct_timeout tm, long long now)
 101 {
 102     conn->expiration = now + ct_timeout_val[tm];
 103     ovs_list_push_back(&ctb->exp_lists[tm], &conn->exp_node);
 104 }
 105
 106 static inline void
 107 conn_update_expiration(struct conntrack_bucket *ctb, struct conn *conn,
 108                        enum ct_timeout tm, long long now)
 109 {
 110     ovs_list_remove(&conn->exp_node);
 111     conn_init_expiration(ctb, conn, tm, now);
 112 }
 113
 114 #endif /* conntrack-private.h */