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
  27 #include <vnet/vnet_msg_enum.h>
  28
  29 #define vl_typedefs             /* define message structures */
  30 #include <vnet/vnet_all_api_h.h>
  31 #undef vl_typedefs
  32
  33 #define vl_endianfun            /* define message structures */
  34 #include <vnet/vnet_all_api_h.h>
  35 #undef vl_endianfun
  36
  37 /* instantiate all the print functions we know about */
  38 #define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
  39 #define vl_printfun
  40 #include <vnet/vnet_all_api_h.h>
  41 #undef vl_printfun
  42
  43 #include <vlibapi/api_helper_macros.h>
  44
  45 #define foreach_vpe_api_msg                             \
  46 _(L2TPV3_CREATE_TUNNEL, l2tpv3_create_tunnel)                           \
  47 _(L2TPV3_SET_TUNNEL_COOKIES, l2tpv3_set_tunnel_cookies)                 \
  48 _(L2TPV3_INTERFACE_ENABLE_DISABLE, l2tpv3_interface_enable_disable)     \
  49 _(L2TPV3_SET_LOOKUP_KEY, l2tpv3_set_lookup_key)                         \
  50 _(SW_IF_L2TPV3_TUNNEL_DUMP, sw_if_l2tpv3_tunnel_dump)
  51
  52 static void
  53 send_sw_if_l2tpv3_tunnel_details (vpe_api_main_t * am,
  54                                   vl_api_registration_t * reg,
  55                                   l2t_session_t * s,
  56                                   l2t_main_t * lm, u32 context)
  57 {
  58   vl_api_sw_if_l2tpv3_tunnel_details_t *mp;
  59   u8 *if_name = NULL;
  60   vnet_sw_interface_t *si = NULL;
  61
  62   si = vnet_get_hw_sw_interface (lm->vnet_main, s->hw_if_index);
  63
  64   if_name = format (if_name, "%U",
  65                     format_vnet_sw_interface_name, lm->vnet_main, si);
  66
  67   mp = vl_msg_api_alloc (sizeof (*mp));
  68   memset (mp, 0, sizeof (*mp));
  69   mp->_vl_msg_id = ntohs (VL_API_SW_IF_L2TPV3_TUNNEL_DETAILS);
  70   strncpy ((char *) mp->interface_name,
  71            (char *) if_name, ARRAY_LEN (mp->interface_name) - 1);
  72   mp->sw_if_index = ntohl (si->sw_if_index);
  73   mp->local_session_id = s->local_session_id;
  74   mp->remote_session_id = s->remote_session_id;
  75   mp->local_cookie[0] = s->local_cookie[0];
  76   mp->local_cookie[1] = s->local_cookie[1];
  77   mp->remote_cookie = s->remote_cookie;
  78   clib_memcpy (mp->client_address, &s->client_address,
  79                sizeof (s->client_address));
  80   clib_memcpy (mp->our_address, &s->our_address, sizeof (s->our_address));
  81   mp->l2_sublayer_present = s->l2_sublayer_present;
  82   mp->context = context;
  83
  84   vl_api_send_msg (reg, (u8 *) mp);
  85 }
  86
  87
  88 static void
  89 vl_api_sw_if_l2tpv3_tunnel_dump_t_handler (vl_api_sw_if_l2tpv3_tunnel_dump_t *
  90                                            mp)
  91 {
  92   vpe_api_main_t *am = &vpe_api_main;
  93   l2t_main_t *lm = &l2t_main;
  94   vl_api_registration_t *reg;
  95   l2t_session_t *session;
  96
  97   reg = vl_api_client_index_to_registration (mp->client_index);
  98   if (!reg)
  99     return;
 100
 101   /* *INDENT-OFF* */
 102   pool_foreach (session, lm->sessions,
 103   ({
 104     send_sw_if_l2tpv3_tunnel_details (am, reg, session, lm, mp->context);
 105   }));
 106   /* *INDENT-ON* */
 107 }
 108
 109 static void vl_api_l2tpv3_create_tunnel_t_handler
 110   (vl_api_l2tpv3_create_tunnel_t * mp)
 111 {
 112   vl_api_l2tpv3_create_tunnel_reply_t *rmp;
 113   l2t_main_t *lm = &l2t_main;
 114   u32 sw_if_index = (u32) ~ 0;
 115   int rv;
 116
 117   if (mp->is_ipv6 != 1)
 118     {
 119       rv = VNET_API_ERROR_UNIMPLEMENTED;
 120       goto out;
 121     }
 122
 123   u32 encap_fib_index;
 124
 125   if (mp->encap_vrf_id != ~0)
 126     {
 127       uword *p;
 128       ip6_main_t *im = &ip6_main;
 129       if (!
 130           (p =
 131            hash_get (im->fib_index_by_table_id, ntohl (mp->encap_vrf_id))))
 132         {
 133           rv = VNET_API_ERROR_NO_SUCH_FIB;
 134           goto out;
 135         }
 136       encap_fib_index = p[0];
 137     }
 138   else
 139     {
 140       encap_fib_index = ~0;
 141     }
 142
 143   rv = create_l2tpv3_ipv6_tunnel (lm,
 144                                   (ip6_address_t *) mp->client_address,
 145                                   (ip6_address_t *) mp->our_address,
 146                                   ntohl (mp->local_session_id),
 147                                   ntohl (mp->remote_session_id),
 148                                   clib_net_to_host_u64 (mp->local_cookie),
 149                                   clib_net_to_host_u64 (mp->remote_cookie),
 150                                   mp->l2_sublayer_present,
 151                                   encap_fib_index, &sw_if_index);
 152
 153 out:
 154   /* *INDENT-OFF* */
 155   REPLY_MACRO2(VL_API_L2TPV3_CREATE_TUNNEL_REPLY,
 156   ({
 157     rmp->sw_if_index = ntohl (sw_if_index);
 158   }));
 159   /* *INDENT-ON* */
 160 }
 161
 162 static void vl_api_l2tpv3_set_tunnel_cookies_t_handler
 163   (vl_api_l2tpv3_set_tunnel_cookies_t * mp)
 164 {
 165   vl_api_l2tpv3_set_tunnel_cookies_reply_t *rmp;
 166   l2t_main_t *lm = &l2t_main;
 167   int rv;
 168
 169   VALIDATE_SW_IF_INDEX (mp);
 170
 171   rv = l2tpv3_set_tunnel_cookies (lm, ntohl (mp->sw_if_index),
 172                                   clib_net_to_host_u64 (mp->new_local_cookie),
 173                                   clib_net_to_host_u64
 174                                   (mp->new_remote_cookie));
 175
 176   BAD_SW_IF_INDEX_LABEL;
 177
 178   REPLY_MACRO (VL_API_L2TPV3_SET_TUNNEL_COOKIES_REPLY);
 179 }
 180
 181 static void vl_api_l2tpv3_interface_enable_disable_t_handler
 182   (vl_api_l2tpv3_interface_enable_disable_t * mp)
 183 {
 184   int rv;
 185   vnet_main_t *vnm = vnet_get_main ();
 186   vl_api_l2tpv3_interface_enable_disable_reply_t *rmp;
 187
 188   VALIDATE_SW_IF_INDEX (mp);
 189
 190   rv = l2tpv3_interface_enable_disable
 191     (vnm, ntohl (mp->sw_if_index), mp->enable_disable);
 192
 193   BAD_SW_IF_INDEX_LABEL;
 194
 195   REPLY_MACRO (VL_API_L2TPV3_INTERFACE_ENABLE_DISABLE_REPLY);
 196 }
 197
 198 static void vl_api_l2tpv3_set_lookup_key_t_handler
 199   (vl_api_l2tpv3_set_lookup_key_t * mp)
 200 {
 201   int rv = 0;
 202   l2t_main_t *lm = &l2t_main;
 203   vl_api_l2tpv3_set_lookup_key_reply_t *rmp;
 204
 205   if (mp->key > L2T_LOOKUP_SESSION_ID)
 206     {
 207       rv = VNET_API_ERROR_INVALID_VALUE;
 208       goto out;
 209     }
 210
 211   lm->lookup_type = mp->key;
 212
 213 out:
 214   REPLY_MACRO (VL_API_L2TPV3_SET_LOOKUP_KEY_REPLY);
 215 }
 216
 217 /*
 218  * l2tp_api_hookup
 219  * Add vpe's API message handlers to the table.
 220  * vlib has already mapped shared memory and
 221  * added the client registration handlers.
 222  * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
 223  */
 224 #define vl_msg_name_crc_list
 225 #include <vnet/vnet_all_api_h.h>
 226 #undef vl_msg_name_crc_list
 227
 228 static void
 229 setup_message_id_table (api_main_t * am)
 230 {
 231 #define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
 232   foreach_vl_msg_name_crc_l2tp;
 233 #undef _
 234 }
 235
 236 static clib_error_t *
 237 l2tp_api_hookup (vlib_main_t * vm)
 238 {
 239   api_main_t *am = &api_main;
 240
 241 #define _(N,n)                                                  \
 242     vl_msg_api_set_handlers(VL_API_##N, #n,                     \
 243                            vl_api_##n##_t_handler,              \
 244                            vl_noop_handler,                     \
 245                            vl_api_##n##_t_endian,               \
 246                            vl_api_##n##_t_print,                \
 247                            sizeof(vl_api_##n##_t), 1);
 248   foreach_vpe_api_msg;
 249 #undef _
 250
 251   /*
 252    * Set up the (msg_name, crc, message-id) table
 253    */
 254   setup_message_id_table (am);
 255
 256   return 0;
 257 }
 258
 259 VLIB_API_INIT_FUNCTION (l2tp_api_hookup);
 260
 261 /*
 262  * fd.io coding-style-patch-verification: ON
 263  *
 264  * Local Variables:
 265  * eval: (c-set-style "gnu")
 266  * End:
 267  */