src/vnet/ipip/sixrd.h

   1 /*---------------------------------------------------------------------------
   2  * Copyright (c) 2009-2014 Cisco and/or its affiliates.
   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 #include <stdbool.h>
  17 #include <vnet/fib/ip6_fib.h>
  18 #include <vnet/ip/ip.h>
  19 #include <vnet/ipip/ipip.h>
  20 #include <vnet/vnet.h>
  21 #include <vppinfra/error.h>
  22
  23 #define SIXRD_DEFAULT_MTU 1480  /* 1500 - IPv4 header */
  24
  25 #define foreach_sixrd_error                                                    \
  26   /* Must be first. */                                                         \
  27   _(NONE, "valid SIXRD packets")                                               \
  28   _(BAD_PROTOCOL, "bad protocol")                                              \
  29   _(SEC_CHECK, "security check failed")                                        \
  30   _(NO_TUNNEL, "no tunnel")
  31
  32
  33 typedef enum
  34 {
  35 #define _(sym, str) SIXRD_ERROR_##sym,
  36   foreach_sixrd_error
  37 #undef _
  38     SIXRD_N_ERROR,
  39 } sixrd_error_t;
  40
  41 extern sixrd_main_t sixrd_main;
  42
  43 static_always_inline sixrd_tunnel_t *
  44 find_tunnel_by_ip4_address (ip4_address_t * ip)
  45 {
  46   sixrd_main_t *sm = &sixrd_main;
  47   uword *p;
  48   p = hash_get (sm->tunnel_by_ip, ip->as_u32);
  49   if (!p)
  50     return NULL;
  51   return pool_elt_at_index (sm->tunnels, p[0]);
  52 }
  53
  54 static_always_inline sixrd_tunnel_t *
  55 ip4_sixrd_get_tunnel (u32 sdi, ip4_address_t * addr, u8 * error)
  56 {
  57   sixrd_tunnel_t *t = find_tunnel_by_ip4_address (addr);
  58   if (!t)
  59     {
  60       *error = SIXRD_ERROR_NO_TUNNEL;
  61       return NULL;
  62     }
  63   return t;
  64 }
  65
  66 /*
  67  * fd.io coding-style-patch-verification: ON
  68  *
  69  * Local Variables:
  70  * eval: (c-set-style "gnu")
  71  * End:
  72  */