Line data    Source code

       1             : /*
       2             :  *------------------------------------------------------------------
       3             :  * gre_api.c - gre api
       4             :  *
       5             :  * Copyright (c) 2016 Cisco and/or its affiliates.
       6             :  * Licensed under the Apache License, Version 2.0 (the "License");
       7             :  * you may not use this file except in compliance with the License.
       8             :  * You may obtain a copy of the License at:
       9             :  *
      10             :  *     http://www.apache.org/licenses/LICENSE-2.0
      11             :  *
      12             :  * Unless required by applicable law or agreed to in writing, software
      13             :  * distributed under the License is distributed on an "AS IS" BASIS,
      14             :  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      15             :  * See the License for the specific language governing permissions and
      16             :  * limitations under the License.
      17             :  *------------------------------------------------------------------
      18             :  */
      19             : 
      20             : #include <vnet/vnet.h>
      21             : #include <vlibmemory/api.h>
      22             : 
      23             : #include <vnet/interface.h>
      24             : #include <vnet/api_errno.h>
      25             : 
      26             : #include <gre/gre.h>
      27             : #include <vnet/fib/fib_table.h>
      28             : #include <vnet/tunnel/tunnel_types_api.h>
      29             : #include <vnet/ip/ip_types_api.h>
      30             : 
      31             : #include <gre/gre.api_enum.h>
      32             : #include <gre/gre.api_types.h>
      33             : 
      34             : #define REPLY_MSG_ID_BASE gre_main.msg_id_base
      35             : #include <vlibapi/api_helper_macros.h>
      36             : 
      37             : static int
      38          95 : gre_tunnel_type_decode (vl_api_gre_tunnel_type_t in, gre_tunnel_type_t *out)
      39             : {
      40          95 :   switch (in)
      41             :     {
      42             : #define _(n, v)                                                               \
      43             :   case GRE_API_TUNNEL_TYPE_##n:                                               \
      44             :     *out = GRE_TUNNEL_TYPE_##n;                                               \
      45             :     return (0);
      46          95 :       foreach_gre_tunnel_type
      47             : #undef _
      48             :     }
      49             : 
      50           0 :   return (VNET_API_ERROR_INVALID_VALUE);
      51             : }
      52             : 
      53             : static vl_api_gre_tunnel_type_t
      54          36 : gre_tunnel_type_encode (gre_tunnel_type_t in)
      55             : {
      56          36 :   vl_api_gre_tunnel_type_t out = GRE_API_TUNNEL_TYPE_L3;
      57             : 
      58          36 :   switch (in)
      59             :     {
      60             : #define _(n, v)                                                               \
      61             :   case GRE_TUNNEL_TYPE_##n:                                                   \
      62             :     out = GRE_API_TUNNEL_TYPE_##n;                                            \
      63             :     break;
      64          36 :       foreach_gre_tunnel_type
      65             : #undef _
      66             :     }
      67             : 
      68          36 :   return (out);
      69             : }
      70             : 
      71             : static void
      72          95 : vl_api_gre_tunnel_add_del_t_handler (vl_api_gre_tunnel_add_del_t *mp)
      73             : {
      74          95 :   vnet_gre_tunnel_add_del_args_t _a = {}, *a = &_a;
      75             :   vl_api_gre_tunnel_add_del_reply_t *rmp;
      76             :   tunnel_encap_decap_flags_t flags;
      77          95 :   u32 sw_if_index = ~0;
      78             :   ip46_type_t itype[2];
      79          95 :   int rv = 0;
      80             : 
      81          95 :   itype[0] = ip_address_decode (&mp->tunnel.src, &a->src);
      82          95 :   itype[1] = ip_address_decode (&mp->tunnel.dst, &a->dst);
      83             : 
      84          95 :   if (itype[0] != itype[1])
      85             :     {
      86           0 :       rv = VNET_API_ERROR_INVALID_PROTOCOL;
      87           0 :       goto out;
      88             :     }
      89             : 
      90          95 :   if (ip46_address_is_equal (&a->src, &a->dst))
      91             :     {
      92           0 :       rv = VNET_API_ERROR_SAME_SRC_DST;
      93           0 :       goto out;
      94             :     }
      95             : 
      96          95 :   rv = gre_tunnel_type_decode (mp->tunnel.type, &a->type);
      97             : 
      98          95 :   if (rv)
      99           0 :     goto out;
     100             : 
     101          95 :   rv = tunnel_mode_decode (mp->tunnel.mode, &a->mode);
     102             : 
     103          95 :   if (rv)
     104           0 :     goto out;
     105             : 
     106          95 :   rv = tunnel_encap_decap_flags_decode (mp->tunnel.flags, &flags);
     107             : 
     108          95 :   if (rv)
     109           0 :     goto out;
     110             : 
     111          95 :   a->is_add = mp->is_add;
     112          95 :   a->is_ipv6 = (itype[0] == IP46_TYPE_IP6);
     113          95 :   a->instance = ntohl (mp->tunnel.instance);
     114          95 :   a->session_id = ntohs (mp->tunnel.session_id);
     115          95 :   a->outer_table_id = ntohl (mp->tunnel.outer_table_id);
     116          95 :   a->flags = flags;
     117             : 
     118          95 :   rv = vnet_gre_tunnel_add_del (a, &sw_if_index);
     119             : 
     120          95 : out:
     121             :   /* *INDENT-OFF* */
     122          95 :   REPLY_MACRO2 (VL_API_GRE_TUNNEL_ADD_DEL_REPLY,
     123             :                 ({ rmp->sw_if_index = ntohl (sw_if_index); }));
     124             :   /* *INDENT-ON* */
     125             : }
     126             : 
     127             : static void
     128          36 : send_gre_tunnel_details (gre_tunnel_t *t, vl_api_gre_tunnel_dump_t *mp)
     129             : {
     130             :   vl_api_gre_tunnel_details_t *rmp;
     131             : 
     132             :   /* *INDENT-OFF* */
     133          36 :   REPLY_MACRO_DETAILS2 (
     134             :     VL_API_GRE_TUNNEL_DETAILS, ({
     135             :       ip_address_encode (&t->tunnel_src, IP46_TYPE_ANY, &rmp->tunnel.src);
     136             :       ip_address_encode (&t->tunnel_dst.fp_addr, IP46_TYPE_ANY,
     137             :                          &rmp->tunnel.dst);
     138             : 
     139             :       rmp->tunnel.outer_table_id = htonl (
     140             :         fib_table_get_table_id (t->outer_fib_index, t->tunnel_dst.fp_proto));
     141             : 
     142             :       rmp->tunnel.type = gre_tunnel_type_encode (t->type);
     143             :       rmp->tunnel.mode = tunnel_mode_encode (t->mode);
     144             :       rmp->tunnel.flags = tunnel_encap_decap_flags_encode (t->flags);
     145             :       rmp->tunnel.instance = htonl (t->user_instance);
     146             :       rmp->tunnel.sw_if_index = htonl (t->sw_if_index);
     147             :       rmp->tunnel.session_id = htons (t->session_id);
     148             :     }));
     149             :   /* *INDENT-ON* */
     150             : }
     151             : 
     152             : static void
     153          83 : vl_api_gre_tunnel_dump_t_handler (vl_api_gre_tunnel_dump_t *mp)
     154             : {
     155             :   vl_api_registration_t *reg;
     156          83 :   gre_main_t *gm = &gre_main;
     157             :   gre_tunnel_t *t;
     158             :   u32 sw_if_index;
     159             : 
     160          83 :   reg = vl_api_client_index_to_registration (mp->client_index);
     161          83 :   if (!reg)
     162           0 :     return;
     163             : 
     164          83 :   sw_if_index = ntohl (mp->sw_if_index);
     165             : 
     166          83 :   if (~0 == sw_if_index)
     167             :     {
     168             :       /* *INDENT-OFF* */
     169           0 :       pool_foreach (t, gm->tunnels)
     170             :         {
     171           0 :           send_gre_tunnel_details (t, mp);
     172             :         }
     173             :       /* *INDENT-ON* */
     174             :     }
     175             : 
     176             :   else
     177             :     {
     178          83 :       if ((sw_if_index >= vec_len (gm->tunnel_index_by_sw_if_index)) ||
     179          83 :           (~0 == gm->tunnel_index_by_sw_if_index[sw_if_index]))
     180             :         {
     181          47 :           return;
     182             :         }
     183          36 :       t = &gm->tunnels[gm->tunnel_index_by_sw_if_index[sw_if_index]];
     184          36 :       send_gre_tunnel_details (t, mp);
     185             :     }
     186             : }
     187             : 
     188             : /*
     189             :  * gre_api_hookup
     190             :  * Add vpe's API message handlers to the table.
     191             :  * vlib has already mapped shared memory and
     192             :  * added the client registration handlers.
     193             :  * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
     194             :  */
     195             : /* API definitions */
     196             : #include <vnet/format_fns.h>
     197             : #include <gre/gre.api.c>
     198             : 
     199             : static clib_error_t *
     200         559 : gre_api_hookup (vlib_main_t *vm)
     201             : {
     202             :   /*
     203             :    * Set up the (msg_name, crc, message-id) table
     204             :    */
     205         559 :   gre_main.msg_id_base = setup_message_id_table ();
     206             : 
     207         559 :   return 0;
     208             : }
     209             : 
     210        1119 : VLIB_API_INIT_FUNCTION (gre_api_hookup);
     211             : 
     212             : /*
     213             :  * fd.io coding-style-patch-verification: ON
     214             :  *
     215             :  * Local Variables:
     216             :  * eval: (c-set-style "gnu")
     217             :  * End:
     218             :  */