src/vnet/l2tp/l2tp_api.c

   1 /*
   2  *------------------------------------------------------------------
   3  * l2tp_api.c - l2tpv3 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 #include <vnet/l2tp/l2tp.h>
  26 #include <vnet/ip/ip_types_api.h>
  27
  28 #include <vnet/vnet_msg_enum.h>
  29
  30 #define vl_typedefs             /* define message structures */
  31 #include <vnet/vnet_all_api_h.h>
  32 #undef vl_typedefs
  33
  34 #define vl_endianfun            /* define message structures */
  35 #include <vnet/vnet_all_api_h.h>
  36 #undef vl_endianfun
  37
  38 /* instantiate all the print functions we know about */
  39 #define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
  40 #define vl_printfun
  41 #include <vnet/vnet_all_api_h.h>
  42 #undef vl_printfun
  43
  44 #include <vlibapi/api_helper_macros.h>
  45
  46 #define foreach_vpe_api_msg                             \
  47 _(L2TPV3_CREATE_TUNNEL, l2tpv3_create_tunnel)                           \
  48 _(L2TPV3_SET_TUNNEL_COOKIES, l2tpv3_set_tunnel_cookies)                 \
  49 _(L2TPV3_INTERFACE_ENABLE_DISABLE, l2tpv3_interface_enable_disable)     \
  50 _(L2TPV3_SET_LOOKUP_KEY, l2tpv3_set_lookup_key)                         \
  51 _(SW_IF_L2TPV3_TUNNEL_DUMP, sw_if_l2tpv3_tunnel_dump)
  52
  53 static void
  54 send_sw_if_l2tpv3_tunnel_details (vpe_api_main_t * am,
  55                                   vl_api_registration_t * reg,
  56                                   l2t_session_t * s,
  57                                   l2t_main_t * lm, u32 context)
  58 {
  59   vl_api_sw_if_l2tpv3_tunnel_details_t *mp;
  60   u8 *if_name = NULL;
  61   vnet_sw_interface_t *si = NULL;
  62
  63   si = vnet_get_hw_sw_interface (lm->vnet_main, s->hw_if_index);
  64
  65   if_name = format (if_name, "%U",
  66                     format_vnet_sw_interface_name, lm->vnet_main, si);
  67
  68   mp = vl_msg_api_alloc (sizeof (*mp));
  69   clib_memset (mp, 0, sizeof (*mp));
  70   mp->_vl_msg_id = ntohs (VL_API_SW_IF_L2TPV3_TUNNEL_DETAILS);
  71   strncpy ((char *) mp->interface_name,
  72            (char *) if_name, ARRAY_LEN (mp->interface_name) - 1);
  73   mp->sw_if_index = ntohl (si->sw_if_index);
  74   mp->local_session_id = s->local_session_id;
  75   mp->remote_session_id = s->remote_session_id;
  76   mp->local_cookie[0] = s->local_cookie[0];
  77   mp->local_cookie[1] = s->local_cookie[1];
  78   mp->remote_cookie = s->remote_cookie;
  79   ip_address_encode ((ip46_address_t *) & s->client_address, IP46_TYPE_IP6,
  80                      &mp->client_address);
  81   ip_address_encode ((ip46_address_t *) & s->our_address, IP46_TYPE_IP6,
  82                      &mp->our_address);
  83   mp->l2_sublayer_present = s->l2_sublayer_present;
  84   mp->context = context;
  85
  86   vl_api_send_msg (reg, (u8 *) mp);
  87 }
  88
  89
  90 static void
  91 vl_api_sw_if_l2tpv3_tunnel_dump_t_handler (vl_api_sw_if_l2tpv3_tunnel_dump_t *
  92                                            mp)
  93 {
  94   vpe_api_main_t *am = &vpe_api_main;
  95   l2t_main_t *lm = &l2t_main;
  96   vl_api_registration_t *reg;
  97   l2t_session_t *session;
  98
  99   reg = vl_api_client_index_to_registration (mp->client_index);
 100   if (!reg)
 101     return;
 102
 103   /* *INDENT-OFF* */
 104   pool_foreach (session, lm->sessions,
 105   ({
 106     send_sw_if_l2tpv3_tunnel_details (am, reg, session, lm, mp->context);
 107   }));
 108   /* *INDENT-ON* */
 109 }
 110
 111 static void vl_api_l2tpv3_create_tunnel_t_handler
 112   (vl_api_l2tpv3_create_tunnel_t * mp)
 113 {
 114   vl_api_l2tpv3_create_tunnel_reply_t *rmp;
 115   l2t_main_t *lm = &l2t_main;
 116   u32 sw_if_index = (u32) ~ 0;
 117   int rv;
 118   ip46_address_t client, our;
 119
 120   if (mp->our_address.af == ADDRESS_IP4)
 121     {
 122       rv = VNET_API_ERROR_UNIMPLEMENTED;
 123       goto out;
 124     }
 125
 126   u32 encap_fib_index;
 127
 128   if (mp->encap_vrf_id != ~0)
 129     {
 130       uword *p;
 131       ip6_main_t *im = &ip6_main;
 132       if (!
 133           (p =
 134            hash_get (im->fib_index_by_table_id, ntohl (mp->encap_vrf_id))))
 135         {
 136           rv = VNET_API_ERROR_NO_SUCH_FIB;
 137           goto out;
 138         }
 139       encap_fib_index = p[0];
 140     }
 141   else
 142     {
 143       encap_fib_index = ~0;
 144     }
 145
 146   ip_address_decode (&mp->client_address, &client);
 147   ip_address_decode (&mp->our_address, &our);
 148
 149   rv = create_l2tpv3_ipv6_tunnel (lm,
 150                                   &client.ip6,
 151                                   &our.ip6,
 152                                   ntohl (mp->local_session_id),
 153                                   ntohl (mp->remote_session_id),
 154                                   clib_net_to_host_u64 (mp->local_cookie),
 155                                   clib_net_to_host_u64 (mp->remote_cookie),
 156                                   mp->l2_sublayer_present,
 157                                   encap_fib_index, &sw_if_index);
 158
 159 out:
 160   /* *INDENT-OFF* */
 161   REPLY_MACRO2(VL_API_L2TPV3_CREATE_TUNNEL_REPLY,
 162   ({
 163     rmp->sw_if_index = ntohl (sw_if_index);
 164   }));
 165   /* *INDENT-ON* */
 166 }
 167
 168 static void vl_api_l2tpv3_set_tunnel_cookies_t_handler
 169   (vl_api_l2tpv3_set_tunnel_cookies_t * mp)
 170 {
 171   vl_api_l2tpv3_set_tunnel_cookies_reply_t *rmp;
 172   l2t_main_t *lm = &l2t_main;
 173   int rv;
 174
 175   VALIDATE_SW_IF_INDEX (mp);
 176
 177   rv = l2tpv3_set_tunnel_cookies (lm, ntohl (mp->sw_if_index),
 178                                   clib_net_to_host_u64 (mp->new_local_cookie),
 179                                   clib_net_to_host_u64
 180                                   (mp->new_remote_cookie));
 181
 182   BAD_SW_IF_INDEX_LABEL;
 183
 184   REPLY_MACRO (VL_API_L2TPV3_SET_TUNNEL_COOKIES_REPLY);
 185 }
 186
 187 static void vl_api_l2tpv3_interface_enable_disable_t_handler
 188   (vl_api_l2tpv3_interface_enable_disable_t * mp)
 189 {
 190   int rv;
 191   vnet_main_t *vnm = vnet_get_main ();
 192   vl_api_l2tpv3_interface_enable_disable_reply_t *rmp;
 193
 194   VALIDATE_SW_IF_INDEX (mp);
 195
 196   rv = l2tpv3_interface_enable_disable
 197     (vnm, ntohl (mp->sw_if_index), mp->enable_disable);
 198
 199   BAD_SW_IF_INDEX_LABEL;
 200
 201   REPLY_MACRO (VL_API_L2TPV3_INTERFACE_ENABLE_DISABLE_REPLY);
 202 }
 203
 204 static void vl_api_l2tpv3_set_lookup_key_t_handler
 205   (vl_api_l2tpv3_set_lookup_key_t * mp)
 206 {
 207   int rv = 0;
 208   l2t_main_t *lm = &l2t_main;
 209   vl_api_l2tpv3_set_lookup_key_reply_t *rmp;
 210
 211   if (mp->key > L2T_LOOKUP_KEY_API_SESSION_ID)
 212     {
 213       rv = VNET_API_ERROR_INVALID_VALUE;
 214       goto out;
 215     }
 216
 217   lm->lookup_type = (ip6_to_l2_lookup_t) mp->key;
 218
 219 out:
 220   REPLY_MACRO (VL_API_L2TPV3_SET_LOOKUP_KEY_REPLY);
 221 }
 222
 223 /*
 224  * l2tp_api_hookup
 225  * Add vpe's API message handlers to the table.
 226  * vlib has already mapped shared memory and
 227  * added the client registration handlers.
 228  * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
 229  */
 230 #define vl_msg_name_crc_list
 231 #include <vnet/vnet_all_api_h.h>
 232 #undef vl_msg_name_crc_list
 233
 234 static void
 235 setup_message_id_table (api_main_t * am)
 236 {
 237 #define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
 238   foreach_vl_msg_name_crc_l2tp;
 239 #undef _
 240 }
 241
 242 static clib_error_t *
 243 l2tp_api_hookup (vlib_main_t * vm)
 244 {
 245   api_main_t *am = &api_main;
 246
 247 #define _(N,n)                                                  \
 248     vl_msg_api_set_handlers(VL_API_##N, #n,                     \
 249                            vl_api_##n##_t_handler,              \
 250                            vl_noop_handler,                     \
 251                            vl_api_##n##_t_endian,               \
 252                            vl_api_##n##_t_print,                \
 253                            sizeof(vl_api_##n##_t), 1);
 254   foreach_vpe_api_msg;
 255 #undef _
 256
 257   /*
 258    * Set up the (msg_name, crc, message-id) table
 259    */
 260   setup_message_id_table (am);
 261
 262   return 0;
 263 }
 264
 265 VLIB_API_INIT_FUNCTION (l2tp_api_hookup);
 266
 267 /*
 268  * fd.io coding-style-patch-verification: ON
 269  *
 270  * Local Variables:
 271  * eval: (c-set-style "gnu")
 272  * End:
 273  */