Line data    Source code

       1             : /*
       2             :  * mss_clamp_api.c - TCP MSS clamping plug-in
       3             :  *
       4             :  * Copyright (c) <current-year> <your-organization>
       5             :  * Licensed under the Apache License, Version 2.0 (the "License");
       6             :  * you may not use this file except in compliance with the License.
       7             :  * You may obtain a copy of the License at:
       8             :  *
       9             :  *     http://www.apache.org/licenses/LICENSE-2.0
      10             :  *
      11             :  * Unless required by applicable law or agreed to in writing, software
      12             :  * distributed under the License is distributed on an "AS IS" BASIS,
      13             :  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      14             :  * See the License for the specific language governing permissions and
      15             :  * limitations under the License.
      16             :  */
      17             : 
      18             : #include <vnet/vnet.h>
      19             : #include <vnet/plugin/plugin.h> /* VLIB_PLUGIN_REGISTER */
      20             : #include <mss_clamp/mss_clamp.h>
      21             : #include <mss_clamp/mss_clamp.api_enum.h>
      22             : #include <mss_clamp/mss_clamp.api_types.h>
      23             : #include <vlibapi/api.h>
      24             : #include <vlibmemory/api.h>
      25             : #include <vpp/app/version.h> /* VPP_BUILD_VER */
      26             : 
      27             : #define REPLY_MSG_ID_BASE cm->msg_id_base
      28             : #include <vlibapi/api_helper_macros.h>
      29             : 
      30             : /* API message handler */
      31             : static void
      32          16 : vl_api_mss_clamp_enable_disable_t_handler (
      33             :   vl_api_mss_clamp_enable_disable_t *mp)
      34             : {
      35          16 :   mssc_main_t *cm = &mssc_main;
      36             :   vl_api_mss_clamp_enable_disable_reply_t *rmp;
      37             :   int rv;
      38             :   u32 sw_if_index;
      39             : 
      40          16 :   sw_if_index = ntohl (mp->sw_if_index);
      41             : 
      42          16 :   VALIDATE_SW_IF_INDEX (mp);
      43             : 
      44             :   rv =
      45          16 :     mssc_enable_disable (sw_if_index, mp->ipv4_direction, mp->ipv6_direction,
      46          16 :                          ntohs (mp->ipv4_mss), ntohs (mp->ipv6_mss));
      47             : 
      48          16 :   BAD_SW_IF_INDEX_LABEL;
      49          16 :   REPLY_MACRO (VL_API_MSS_CLAMP_ENABLE_DISABLE_REPLY);
      50             : }
      51             : 
      52             : static void
      53           4 : send_mss_clamp_details (u32 sw_if_index, vl_api_registration_t *rp,
      54             :                         u32 context)
      55             : {
      56           4 :   mssc_main_t *cm = &mssc_main;
      57             :   vl_api_mss_clamp_details_t *rmp;
      58             :   u16 mss4, mss6;
      59             :   u8 dir4, dir6;
      60             :   int rv;
      61             : 
      62           4 :   mss4 = mss6 = 0;
      63           4 :   dir4 = dir6 = MSS_CLAMP_DIR_NONE;
      64           4 :   rv = mssc_get_mss (sw_if_index, &dir4, &dir6, &mss4, &mss6);
      65           4 :   if (rv == VNET_API_ERROR_FEATURE_DISABLED)
      66           0 :     return;
      67             : 
      68           4 :   REPLY_MACRO_DETAILS4 (VL_API_MSS_CLAMP_DETAILS, rp, context, ({
      69             :                           rmp->sw_if_index = htonl (sw_if_index);
      70             :                           rmp->ipv4_mss = htons (mss4);
      71             :                           rmp->ipv6_mss = htons (mss6);
      72             :                           rmp->ipv4_direction = dir4;
      73             :                           rmp->ipv6_direction = dir6;
      74             :                         }));
      75             : }
      76             : 
      77             : static void
      78           4 : vl_api_mss_clamp_get_t_handler (vl_api_mss_clamp_get_t *mp)
      79             : {
      80           4 :   mssc_main_t *cm = &mssc_main;
      81             :   vl_api_mss_clamp_get_reply_t *rmp;
      82           4 :   int rv = 0;
      83           4 :   u32 sw_if_index = ntohl (mp->sw_if_index);
      84             :   vl_api_registration_t *reg;
      85             : 
      86           4 :   reg = vl_api_client_index_to_registration (mp->client_index);
      87           4 :   if (!reg)
      88           0 :     return;
      89             : 
      90           4 :   if (sw_if_index == ~0)
      91             :     {
      92           0 :       if (vec_len (cm->dir_enabled4) == 0)
      93             :         {
      94           0 :           REPLY_MACRO2 (VL_API_MSS_CLAMP_GET_REPLY, ({ rmp->cursor = ~0; }));
      95           0 :           return;
      96             :         }
      97             : 
      98           0 :       REPLY_AND_DETAILS_VEC_MACRO (
      99             :         VL_API_MSS_CLAMP_GET_REPLY, cm->dir_enabled4, mp, rmp, rv,
     100             :         ({ send_mss_clamp_details (cursor, reg, mp->context); }));
     101             :     }
     102             :   else
     103             :     {
     104           4 :       VALIDATE_SW_IF_INDEX (mp);
     105           4 :       send_mss_clamp_details (sw_if_index, reg, mp->context);
     106             : 
     107           4 :       BAD_SW_IF_INDEX_LABEL;
     108           4 :       REPLY_MACRO2 (VL_API_MSS_CLAMP_GET_REPLY, ({ rmp->cursor = ~0; }));
     109             :     }
     110             : }
     111             : 
     112             : /* API definitions */
     113             : #include <vnet/format_fns.h>
     114             : #include <mss_clamp/mss_clamp.api.c>
     115             : 
     116             : /* Set up the API message handling tables */
     117             : static clib_error_t *
     118         559 : mssc_api_hookup (vlib_main_t *vm)
     119             : {
     120         559 :   mssc_main_t *cm = &mssc_main;
     121             : 
     122         559 :   cm->msg_id_base = setup_message_id_table ();
     123         559 :   return 0;
     124             : }
     125             : 
     126        1119 : VLIB_API_INIT_FUNCTION (mssc_api_hookup);
     127             : 
     128             : VLIB_PLUGIN_REGISTER () = {
     129             :   .version = VPP_BUILD_VER,
     130             :   .description = "TCP MSS clamping plugin",
     131             : };
     132             : 
     133             : /*
     134             :  * fd.io coding-style-patch-verification: ON
     135             :  *
     136             :  * Local Variables:
     137             :  * eval: (c-set-style "gnu")
     138             :  * End:
     139             :  */