src/plugins/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 <l2tp/l2tp.h>
  26 #include <vnet/ip/ip_types_api.h>
  27
  28 /* define message IDs */
  29 #include <vnet/format_fns.h>
  30 #include <l2tp/l2tp.api_enum.h>
  31 #include <l2tp/l2tp.api_types.h>
  32
  33 /**
  34  * Base message ID fot the plugin
  35  */
  36 static u32 l2tp_base_msg_id;
  37 #define REPLY_MSG_ID_BASE l2tp_base_msg_id
  38
  39 #include <vlibapi/api_helper_macros.h>
  40
  41 static void
  42 send_sw_if_l2tpv3_tunnel_details (vpe_api_main_t * am,
  43                                   vl_api_registration_t * reg,
  44                                   l2t_session_t * s,
  45                                   l2t_main_t * lm, u32 context)
  46 {
  47   vl_api_sw_if_l2tpv3_tunnel_details_t *mp;
  48   u8 *if_name = NULL;
  49   vnet_sw_interface_t *si = NULL;
  50
  51   si = vnet_get_hw_sw_interface (lm->vnet_main, s->hw_if_index);
  52
  53   if_name = format (if_name, "%U",
  54                     format_vnet_sw_interface_name, lm->vnet_main, si);
  55
  56   mp = vl_msg_api_alloc (sizeof (*mp));
  57   clib_memset (mp, 0, sizeof (*mp));
  58   mp->_vl_msg_id =
  59     ntohs (VL_API_SW_IF_L2TPV3_TUNNEL_DETAILS + REPLY_MSG_ID_BASE);
  60   strncpy ((char *) mp->interface_name, (char *) if_name,
  61            ARRAY_LEN (mp->interface_name) - 1);
  62   mp->sw_if_index = ntohl (si->sw_if_index);
  63   mp->local_session_id = s->local_session_id;
  64   mp->remote_session_id = s->remote_session_id;
  65   mp->local_cookie[0] = s->local_cookie[0];
  66   mp->local_cookie[1] = s->local_cookie[1];
  67   mp->remote_cookie = s->remote_cookie;
  68   ip_address_encode ((ip46_address_t *) & s->client_address, IP46_TYPE_IP6,
  69                      &mp->client_address);
  70   ip_address_encode ((ip46_address_t *) & s->our_address, IP46_TYPE_IP6,
  71                      &mp->our_address);
  72   mp->l2_sublayer_present = s->l2_sublayer_present;
  73   mp->context = context;
  74
  75   vl_api_send_msg (reg, (u8 *) mp);
  76 }
  77
  78
  79 static void
  80 vl_api_sw_if_l2tpv3_tunnel_dump_t_handler (vl_api_sw_if_l2tpv3_tunnel_dump_t *
  81                                            mp)
  82 {
  83   vpe_api_main_t *am = &vpe_api_main;
  84   l2t_main_t *lm = &l2t_main;
  85   vl_api_registration_t *reg;
  86   l2t_session_t *session;
  87
  88   reg = vl_api_client_index_to_registration (mp->client_index);
  89   if (!reg)
  90     return;
  91
  92   pool_foreach (session, lm->sessions)
  93    {
  94     send_sw_if_l2tpv3_tunnel_details (am, reg, session, lm, mp->context);
  95   }
  96 }
  97
  98 static void vl_api_l2tpv3_create_tunnel_t_handler
  99   (vl_api_l2tpv3_create_tunnel_t * mp)
 100 {
 101   vl_api_l2tpv3_create_tunnel_reply_t *rmp;
 102   l2t_main_t *lm = &l2t_main;
 103   u32 sw_if_index = (u32) ~ 0;
 104   int rv;
 105   ip46_address_t client, our;
 106
 107   if (mp->our_address.af == ADDRESS_IP4)
 108     {
 109       rv = VNET_API_ERROR_UNIMPLEMENTED;
 110       goto out;
 111     }
 112
 113   u32 encap_fib_index;
 114
 115   if (mp->encap_vrf_id != ~0)
 116     {
 117       uword *p;
 118       ip6_main_t *im = &ip6_main;
 119       if (!
 120           (p =
 121            hash_get (im->fib_index_by_table_id, ntohl (mp->encap_vrf_id))))
 122         {
 123           rv = VNET_API_ERROR_NO_SUCH_FIB;
 124           goto out;
 125         }
 126       encap_fib_index = p[0];
 127     }
 128   else
 129     {
 130       encap_fib_index = ~0;
 131     }
 132
 133   ip_address_decode (&mp->client_address, &client);
 134   ip_address_decode (&mp->our_address, &our);
 135
 136   rv = create_l2tpv3_ipv6_tunnel (lm,
 137                                   &client.ip6,
 138                                   &our.ip6,
 139                                   ntohl (mp->local_session_id),
 140                                   ntohl (mp->remote_session_id),
 141                                   clib_net_to_host_u64 (mp->local_cookie),
 142                                   clib_net_to_host_u64 (mp->remote_cookie),
 143                                   mp->l2_sublayer_present,
 144                                   encap_fib_index, &sw_if_index);
 145
 146 out:
 147   REPLY_MACRO2(VL_API_L2TPV3_CREATE_TUNNEL_REPLY,
 148   ({
 149     rmp->sw_if_index = ntohl (sw_if_index);
 150   }));
 151 }
 152
 153 static void vl_api_l2tpv3_set_tunnel_cookies_t_handler
 154   (vl_api_l2tpv3_set_tunnel_cookies_t * mp)
 155 {
 156   vl_api_l2tpv3_set_tunnel_cookies_reply_t *rmp;
 157   l2t_main_t *lm = &l2t_main;
 158   int rv;
 159
 160   VALIDATE_SW_IF_INDEX (mp);
 161
 162   rv = l2tpv3_set_tunnel_cookies (lm, ntohl (mp->sw_if_index),
 163                                   clib_net_to_host_u64 (mp->new_local_cookie),
 164                                   clib_net_to_host_u64
 165                                   (mp->new_remote_cookie));
 166
 167   BAD_SW_IF_INDEX_LABEL;
 168
 169   REPLY_MACRO (VL_API_L2TPV3_SET_TUNNEL_COOKIES_REPLY);
 170 }
 171
 172 static void vl_api_l2tpv3_interface_enable_disable_t_handler
 173   (vl_api_l2tpv3_interface_enable_disable_t * mp)
 174 {
 175   int rv;
 176   vnet_main_t *vnm = vnet_get_main ();
 177   vl_api_l2tpv3_interface_enable_disable_reply_t *rmp;
 178
 179   VALIDATE_SW_IF_INDEX (mp);
 180
 181   rv = l2tpv3_interface_enable_disable
 182     (vnm, ntohl (mp->sw_if_index), mp->enable_disable);
 183
 184   BAD_SW_IF_INDEX_LABEL;
 185
 186   REPLY_MACRO (VL_API_L2TPV3_INTERFACE_ENABLE_DISABLE_REPLY);
 187 }
 188
 189 static void vl_api_l2tpv3_set_lookup_key_t_handler
 190   (vl_api_l2tpv3_set_lookup_key_t * mp)
 191 {
 192   int rv = 0;
 193   l2t_main_t *lm = &l2t_main;
 194   vl_api_l2tpv3_set_lookup_key_reply_t *rmp;
 195
 196   if (mp->key > L2T_LOOKUP_KEY_API_SESSION_ID)
 197     {
 198       rv = VNET_API_ERROR_INVALID_VALUE;
 199       goto out;
 200     }
 201
 202   lm->lookup_type = (ip6_to_l2_lookup_t) mp->key;
 203
 204 out:
 205   REPLY_MACRO (VL_API_L2TPV3_SET_LOOKUP_KEY_REPLY);
 206 }
 207
 208 /*
 209  * l2tp_api_hookup
 210  * Add vpe's API message handlers to the table.
 211  * vlib has already mapped shared memory and
 212  * added the client registration handlers.
 213  * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
 214  */
 215 #include <l2tp/l2tp.api.c>
 216
 217 static clib_error_t *
 218 l2tp_api_hookup (vlib_main_t * vm)
 219 {
 220   /*
 221    * Set up the (msg_name, crc, message-id) table
 222    */
 223   l2tp_base_msg_id = setup_message_id_table ();
 224
 225   return 0;
 226 }
 227
 228 VLIB_API_INIT_FUNCTION (l2tp_api_hookup);
 229
 230 #include <vlib/unix/plugin.h>
 231 #include <vpp/app/version.h>
 232
 233 VLIB_PLUGIN_REGISTER () = {
 234     .version = VPP_BUILD_VER,
 235     .description = "Layer 2 Tunneling Protocol v3 (L2TP)",
 236 };
 237
 238
 239 /*
 240  * fd.io coding-style-patch-verification: ON
 241  *
 242  * Local Variables:
 243  * eval: (c-set-style "gnu")
 244  * End:
 245  */