Line data    Source code

       1             : /*
       2             :  * Copyright (c) 2016 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 <stddef.h>
      17             : 
      18             : #include <vnet/vnet.h>
      19             : #include <vnet/plugin/plugin.h>
      20             : #include <cnat/cnat_translation.h>
      21             : #include <cnat/cnat_session.h>
      22             : #include <cnat/cnat_client.h>
      23             : #include <cnat/cnat_snat_policy.h>
      24             : 
      25             : #include <vnet/ip/ip_types_api.h>
      26             : 
      27             : #include <vpp/app/version.h>
      28             : 
      29             : #include <vlibapi/api.h>
      30             : #include <vlibmemory/api.h>
      31             : 
      32             : /* define message IDs */
      33             : #include <vnet/format_fns.h>
      34             : #include <cnat/cnat.api_enum.h>
      35             : #include <cnat/cnat.api_types.h>
      36             : 
      37             : /**
      38             :  * Base message ID fot the plugin
      39             :  */
      40             : static u32 cnat_base_msg_id;
      41             : 
      42             : #define REPLY_MSG_ID_BASE cnat_base_msg_id
      43             : 
      44             : #include <vlibapi/api_helper_macros.h>
      45             : 
      46             : static int
      47          64 : cnat_endpoint_decode (const vl_api_cnat_endpoint_t * in,
      48             :                       cnat_endpoint_t * out)
      49             : {
      50          64 :   int rv = 0;
      51          64 :   out->ce_port = clib_net_to_host_u16 (in->port);
      52          64 :   out->ce_sw_if_index = clib_net_to_host_u32 (in->sw_if_index);
      53          64 :   out->ce_flags = 0;
      54          64 :   if (out->ce_sw_if_index == INDEX_INVALID)
      55          54 :     ip_address_decode2 (&in->addr, &out->ce_ip);
      56             :   else
      57          10 :     rv = ip_address_family_decode (in->if_af, &out->ce_ip.version);
      58          64 :   return rv;
      59             : }
      60             : 
      61             : static int
      62          22 : cnat_endpoint_tuple_decode (const vl_api_cnat_endpoint_tuple_t * in,
      63             :                             cnat_endpoint_tuple_t * out)
      64             : {
      65          22 :   int rv = 0;
      66          22 :   rv = cnat_endpoint_decode (&in->src_ep, &out->src_ep);
      67          22 :   if (rv)
      68           0 :     return rv;
      69          22 :   rv = cnat_endpoint_decode (&in->dst_ep, &out->dst_ep);
      70          22 :   out->ep_flags = in->flags;
      71          22 :   return rv;
      72             : }
      73             : 
      74             : static void
      75          20 : cnat_endpoint_encode (const cnat_endpoint_t * in,
      76             :                       vl_api_cnat_endpoint_t * out)
      77             : {
      78          20 :   out->port = clib_net_to_host_u16 (in->ce_port);
      79          20 :   out->sw_if_index = clib_net_to_host_u32 (in->ce_sw_if_index);
      80          20 :   out->if_af = ip_address_family_encode (in->ce_ip.version);
      81          20 :   if (in->ce_flags & CNAT_EP_FLAG_RESOLVED)
      82          20 :     ip_address_encode2 (&in->ce_ip, &out->addr);
      83             :   else
      84           0 :     clib_memset ((void *) &in->ce_ip, 0, sizeof (in->ce_ip));
      85          20 : }
      86             : 
      87             : static void
      88          20 : vl_api_cnat_translation_update_t_handler (vl_api_cnat_translation_update_t
      89             :                                           * mp)
      90             : {
      91             :   vl_api_cnat_translation_update_reply_t *rmp;
      92             :   cnat_endpoint_t vip;
      93          20 :   cnat_endpoint_tuple_t *paths = NULL, *path;
      94             :   ip_protocol_t ip_proto;
      95          20 :   u32 id = ~0;
      96             :   u8 flags;
      97          20 :   int rv = 0;
      98             :   u32 pi, n_paths;
      99             :   cnat_lb_type_t lb_type;
     100             : 
     101          20 :   rv = ip_proto_decode (mp->translation.ip_proto, &ip_proto);
     102             : 
     103          20 :   if (rv)
     104           0 :     goto done;
     105             : 
     106          20 :   n_paths = clib_net_to_host_u32 (mp->translation.n_paths);
     107          20 :   vec_validate (paths, n_paths - 1);
     108             : 
     109          42 :   for (pi = 0; pi < n_paths; pi++)
     110             :     {
     111          22 :       path = &paths[pi];
     112          22 :       rv = cnat_endpoint_tuple_decode (&mp->translation.paths[pi], path);
     113          22 :       if (rv)
     114           0 :         goto done;
     115             :     }
     116             : 
     117          20 :   rv = cnat_endpoint_decode (&mp->translation.vip, &vip);
     118          20 :   if (rv)
     119           0 :     goto done;
     120             : 
     121          20 :   flags = mp->translation.flags;
     122          20 :   if (!mp->translation.is_real_ip)
     123          20 :     flags |= CNAT_FLAG_EXCLUSIVE;
     124             : 
     125          20 :   lb_type = (cnat_lb_type_t) mp->translation.lb_type;
     126          20 :   id = cnat_translation_update (&vip, ip_proto, paths, flags, lb_type);
     127             : 
     128          20 :   vec_free (paths);
     129             : 
     130          20 : done:
     131          20 :   REPLY_MACRO2 (VL_API_CNAT_TRANSLATION_UPDATE_REPLY,
     132             :   ({
     133             :     rmp->id = htonl (id);
     134             :   }));
     135             : }
     136             : 
     137             : static void
     138          14 : vl_api_cnat_translation_del_t_handler (vl_api_cnat_translation_del_t * mp)
     139             : {
     140             :   vl_api_cnat_translation_del_reply_t *rmp;
     141             :   int rv;
     142             : 
     143          14 :   rv = cnat_translation_delete (ntohl (mp->id));
     144             : 
     145          14 :   REPLY_MACRO (VL_API_CNAT_TRANSLATION_DEL_REPLY);
     146             : }
     147             : 
     148             : typedef struct cnat_dump_walk_ctx_t_
     149             : {
     150             :   vl_api_registration_t *rp;
     151             :   u32 context;
     152             : } cnat_dump_walk_ctx_t;
     153             : 
     154             : static walk_rc_t
     155           4 : cnat_translation_send_details (u32 cti, void *args)
     156             : {
     157             :   vl_api_cnat_translation_details_t *mp;
     158             :   cnat_dump_walk_ctx_t *ctx;
     159             :   cnat_ep_trk_t *trk;
     160             :   vl_api_cnat_endpoint_tuple_t *path;
     161             :   size_t msg_size;
     162             :   cnat_translation_t *ct;
     163             :   u32 n_paths;
     164             : 
     165           4 :   ctx = args;
     166           4 :   ct = cnat_translation_get (cti);
     167           4 :   n_paths = vec_len (ct->ct_paths);
     168           4 :   msg_size = sizeof (*mp) + sizeof (mp->translation.paths[0]) * n_paths;
     169             : 
     170           4 :   mp = vl_msg_api_alloc_zero (msg_size);
     171           4 :   mp->_vl_msg_id = ntohs (VL_API_CNAT_TRANSLATION_DETAILS + cnat_base_msg_id);
     172             : 
     173             :   /* fill in the message */
     174           4 :   mp->context = ctx->context;
     175           4 :   mp->translation.n_paths = clib_host_to_net_u32 (n_paths);
     176           4 :   mp->translation.id = clib_host_to_net_u32 (cti);
     177           4 :   cnat_endpoint_encode (&ct->ct_vip, &mp->translation.vip);
     178           4 :   mp->translation.ip_proto = ip_proto_encode (ct->ct_proto);
     179           4 :   mp->translation.lb_type = (vl_api_cnat_lb_type_t) ct->lb_type;
     180             : 
     181           4 :   path = mp->translation.paths;
     182          12 :   vec_foreach (trk, ct->ct_paths)
     183             :   {
     184           8 :     cnat_endpoint_encode (&trk->ct_ep[VLIB_TX], &path->dst_ep);
     185           8 :     cnat_endpoint_encode (&trk->ct_ep[VLIB_RX], &path->src_ep);
     186           8 :     path->flags = trk->ct_flags;
     187           8 :     path++;
     188             :   }
     189             : 
     190           4 :   vl_api_send_msg (ctx->rp, (u8 *) mp);
     191             : 
     192           4 :   return (WALK_CONTINUE);
     193             : }
     194             : 
     195             : static void
     196          18 : vl_api_cnat_translation_dump_t_handler (vl_api_cnat_translation_dump_t * mp)
     197             : {
     198             :   vl_api_registration_t *rp;
     199             : 
     200          18 :   rp = vl_api_client_index_to_registration (mp->client_index);
     201          18 :   if (rp == 0)
     202           0 :     return;
     203             : 
     204          18 :   cnat_dump_walk_ctx_t ctx = {
     205             :     .rp = rp,
     206          18 :     .context = mp->context,
     207             :   };
     208             : 
     209          18 :   cnat_translation_walk (cnat_translation_send_details, &ctx);
     210             : }
     211             : 
     212             : static void
     213           0 : ip_address2_from_46 (const ip46_address_t * nh,
     214             :                      ip_address_family_t af, ip_address_t * ip)
     215             : {
     216           0 :   ip_addr_46 (ip) = *nh;
     217           0 :   ip_addr_version (ip) = af;
     218           0 : }
     219             : 
     220             : static walk_rc_t
     221           0 : cnat_session_send_details (const cnat_session_t * session, void *args)
     222             : {
     223             :   vl_api_cnat_session_details_t *mp;
     224             :   cnat_dump_walk_ctx_t *ctx;
     225             :   cnat_endpoint_t ep;
     226             : 
     227           0 :   ctx = args;
     228             : 
     229           0 :   mp = vl_msg_api_alloc_zero (sizeof (*mp));
     230           0 :   mp->_vl_msg_id = ntohs (VL_API_CNAT_SESSION_DETAILS + cnat_base_msg_id);
     231             : 
     232             :   /* fill in the message */
     233           0 :   mp->context = ctx->context;
     234             : 
     235           0 :   ep.ce_sw_if_index = INDEX_INVALID;
     236           0 :   ep.ce_flags = CNAT_EP_FLAG_RESOLVED;
     237           0 :   ip_address2_from_46 (&session->value.cs_ip[VLIB_TX], session->key.cs_af,
     238             :                        &ep.ce_ip);
     239           0 :   ep.ce_port = clib_host_to_net_u16 (session->value.cs_port[VLIB_TX]);
     240           0 :   cnat_endpoint_encode (&ep, &mp->session.new);
     241             : 
     242           0 :   ip_address2_from_46 (&session->key.cs_ip[VLIB_RX], session->key.cs_af,
     243             :                        &ep.ce_ip);
     244           0 :   ep.ce_port = clib_host_to_net_u16 (session->key.cs_port[VLIB_RX]);
     245           0 :   cnat_endpoint_encode (&ep, &mp->session.src);
     246             : 
     247           0 :   ip_address2_from_46 (&session->key.cs_ip[VLIB_TX], session->key.cs_af,
     248             :                        &ep.ce_ip);
     249           0 :   ep.ce_port = clib_host_to_net_u16 (session->key.cs_port[VLIB_TX]);
     250           0 :   cnat_endpoint_encode (&ep, &mp->session.dst);
     251             : 
     252           0 :   mp->session.ip_proto = ip_proto_encode (session->key.cs_proto);
     253           0 :   mp->session.location = session->key.cs_loc;
     254             : 
     255           0 :   vl_api_send_msg (ctx->rp, (u8 *) mp);
     256             : 
     257           0 :   return (WALK_CONTINUE);
     258             : }
     259             : 
     260             : static void
     261           6 : vl_api_cnat_session_dump_t_handler (vl_api_cnat_session_dump_t * mp)
     262             : {
     263             :   vl_api_registration_t *rp;
     264             : 
     265           6 :   rp = vl_api_client_index_to_registration (mp->client_index);
     266           6 :   if (rp == 0)
     267           0 :     return;
     268             : 
     269           6 :   cnat_dump_walk_ctx_t ctx = {
     270             :     .rp = rp,
     271           6 :     .context = mp->context,
     272             :   };
     273             : 
     274           6 :   cnat_session_walk (cnat_session_send_details, &ctx);
     275             : }
     276             : 
     277             : static void
     278          14 : vl_api_cnat_session_purge_t_handler (vl_api_cnat_session_purge_t * mp)
     279             : {
     280             :   vl_api_cnat_session_purge_reply_t *rmp;
     281             :   int rv;
     282             : 
     283          14 :   cnat_client_throttle_pool_process ();
     284          14 :   rv = cnat_session_purge ();
     285          14 :   rv |= cnat_translation_purge ();
     286             : 
     287          14 :   REPLY_MACRO (VL_API_CNAT_SESSION_PURGE_REPLY);
     288             : }
     289             : 
     290             : static void
     291           2 : vl_api_cnat_get_snat_addresses_t_handler (vl_api_cnat_get_snat_addresses_t
     292             :                                           * mp)
     293             : {
     294             :   vl_api_cnat_get_snat_addresses_reply_t *rmp;
     295           2 :   cnat_snat_policy_main_t *cpm = &cnat_snat_policy_main;
     296           2 :   int rv = 0;
     297             : 
     298           2 :   REPLY_MACRO2 (
     299             :     VL_API_CNAT_GET_SNAT_ADDRESSES_REPLY, ({
     300             :       ip6_address_encode (&ip_addr_v6 (&cpm->snat_ip6.ce_ip), rmp->snat_ip6);
     301             :       ip4_address_encode (&ip_addr_v4 (&cpm->snat_ip4.ce_ip), rmp->snat_ip4);
     302             :       rmp->sw_if_index = clib_host_to_net_u32 (cpm->snat_ip6.ce_sw_if_index);
     303             :     }));
     304             : }
     305             : 
     306             : static void
     307           6 : vl_api_cnat_set_snat_addresses_t_handler (vl_api_cnat_set_snat_addresses_t
     308             :                                           * mp)
     309             : {
     310             :   vl_api_cnat_set_snat_addresses_reply_t *rmp;
     311           6 :   u32 sw_if_index = clib_net_to_host_u32 (mp->sw_if_index);
     312             :   ip4_address_t ip4;
     313             :   ip6_address_t ip6;
     314           6 :   int rv = 0;
     315             : 
     316           6 :   ip4_address_decode (mp->snat_ip4, &ip4);
     317           6 :   ip6_address_decode (mp->snat_ip6, &ip6);
     318             : 
     319           6 :   cnat_set_snat (&ip4, &ip6, sw_if_index);
     320             : 
     321           6 :   REPLY_MACRO (VL_API_CNAT_SET_SNAT_ADDRESSES_REPLY);
     322             : }
     323             : 
     324             : static void
     325           4 : vl_api_cnat_set_snat_policy_t_handler (vl_api_cnat_set_snat_policy_t *mp)
     326             : {
     327             :   vl_api_cnat_set_snat_policy_reply_t *rmp;
     328           4 :   int rv = 0;
     329           4 :   cnat_snat_policy_type_t policy = (cnat_snat_policy_type_t) mp->policy;
     330             : 
     331           4 :   rv = cnat_set_snat_policy (policy);
     332             : 
     333           4 :   REPLY_MACRO (VL_API_CNAT_SET_SNAT_POLICY_REPLY);
     334             : }
     335             : 
     336             : static void
     337           8 : vl_api_cnat_snat_policy_add_del_exclude_pfx_t_handler (
     338             :   vl_api_cnat_snat_policy_add_del_exclude_pfx_t *mp)
     339             : {
     340             :   vl_api_cnat_snat_policy_add_del_exclude_pfx_reply_t *rmp;
     341             :   ip_prefix_t pfx;
     342             :   int rv;
     343             : 
     344           8 :   ip_prefix_decode2 (&mp->prefix, &pfx);
     345           8 :   if (mp->is_add)
     346           4 :     rv = cnat_snat_policy_add_pfx (&pfx);
     347             :   else
     348           4 :     rv = cnat_snat_policy_del_pfx (&pfx);
     349             : 
     350           8 :   REPLY_MACRO (VL_API_CNAT_SNAT_POLICY_ADD_DEL_EXCLUDE_PFX_REPLY);
     351             : }
     352             : 
     353             : static void
     354          24 : vl_api_cnat_snat_policy_add_del_if_t_handler (
     355             :   vl_api_cnat_snat_policy_add_del_if_t *mp)
     356             : {
     357             :   vl_api_cnat_snat_policy_add_del_if_reply_t *rmp;
     358          24 :   u32 sw_if_index = ntohl (mp->sw_if_index);
     359          24 :   int rv = 0;
     360             : 
     361          24 :   VALIDATE_SW_IF_INDEX (mp);
     362             : 
     363          24 :   cnat_snat_interface_map_type_t table =
     364          24 :     (cnat_snat_interface_map_type_t) mp->table;
     365             : 
     366          24 :   rv = cnat_snat_policy_add_del_if (sw_if_index, mp->is_add, table);
     367             : 
     368          24 :   BAD_SW_IF_INDEX_LABEL;
     369             : 
     370          24 :   REPLY_MACRO (VL_API_CNAT_SNAT_POLICY_ADD_DEL_IF_REPLY);
     371             : }
     372             : 
     373             : #include <cnat/cnat.api.c>
     374             : 
     375             : static clib_error_t *
     376         559 : cnat_api_init (vlib_main_t * vm)
     377             : {
     378             :   /* Ask for a correctly-sized block of API message decode slots */
     379         559 :   cnat_base_msg_id = setup_message_id_table ();
     380             : 
     381         559 :   return 0;
     382             : }
     383             : 
     384        1119 : VLIB_INIT_FUNCTION (cnat_api_init);
     385             : 
     386             : VLIB_PLUGIN_REGISTER () = {
     387             :     .version = VPP_BUILD_VER,
     388             :     .description = "CNat Translate",
     389             : };
     390             : 
     391             : /*
     392             :  * fd.io coding-style-patch-verification: ON
     393             :  *
     394             :  * Local Variables:
     395             :  * eval: (c-set-style "gnu")
     396             :  * End:
     397             :  */