text: /*
   * srv6_t_m_gtp4_dt.c
   *
   * Copyright (c) 2019 Arrcus Inc and/or its affiliates.
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at:
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #include <vnet/vnet.h>
  #include <vnet/adj/adj.h>
  #include <vnet/fib/fib_table.h>
  #include <vnet/plugin/plugin.h>
  #include <vpp/app/version.h>
  #include <srv6-mobile/mobile.h>
  
  srv6_t_main_v4_dt_t srv6_t_main_v4_dt;
  
  static void
  clb_dpo_lock_srv6_t_m_gtp4_dt (dpo_id_t * dpo)
  {
  }
  
  static void
  clb_dpo_unlock_srv6_t_m_gtp4_dt (dpo_id_t * dpo)
  {
  }
  
  static u8 *
  clb_dpo_format_srv6_t_m_gtp4_dt (u8 * s, va_list * args)
  {
    index_t index = va_arg (*args, index_t);
    CLIB_UNUSED (u32 indent) = va_arg (*args, u32);
  
    return (format (s, "SR: dynamic_proxy_index:[%u]", index));
  }
  
  const static dpo_vft_t dpo_vft = {
    .dv_lock = clb_dpo_lock_srv6_t_m_gtp4_dt,
    .dv_unlock = clb_dpo_unlock_srv6_t_m_gtp4_dt,
    .dv_format = clb_dpo_format_srv6_t_m_gtp4_dt,
  };
  
  const static char *const srv6_t_m_gtp4_dt_nodes[] = {
    "srv6-t-m-gtp4-dt",
    NULL,
  };
  
  const static char *const srv6_t_m_gtp4_dt_v6_nodes[] = {
    "error-drop",
    NULL,
  };
  
  const static char *const *const dpo_nodes[DPO_PROTO_NUM] = {
    [DPO_PROTO_IP6] = srv6_t_m_gtp4_dt_v6_nodes,
    [DPO_PROTO_IP4] = srv6_t_m_gtp4_dt_nodes,
  };
  
  static u8 fn_name[] = "SRv6-T.M.GTP4.DT-plugin";
  static u8 keyword_str[] = "t.m.gtp4.dt";
  static u8 def_str[] = "Transit function with DT for IPv4/GTP tunnel";
  static u8 param_str[] = "fib-index <index> [local-fib-table <index>]";
  
  static u8 *
  clb_format_srv6_t_m_gtp4_dt (u8 * s, va_list * args)
  {
    srv6_t_gtp4_dt_param_t *ls_mem = va_arg (*args, void *);
  
    s = format (s, "SRv6 Transit gtp4.dt\n\t");
  
    if (ls_mem->type == SRV6_GTP4_DT4)
      s = format (s, " Type GTP4.DT4 fib-table %u\n", ls_mem->fib4_index);
    else if (ls_mem->type == SRV6_GTP4_DT6)
      s = format (s, " Type GTP4.DT6, fib-table %u, local-fib-table %u\n",
  		ls_mem->fib6_index, ls_mem->local_fib_index);
    else if (ls_mem->type == SRV6_GTP4_DT46)
      s = format (s, " Type GTP4.DT46, fib-table %u, local-fib-table %u\n",
  		ls_mem->fib6_index, ls_mem->local_fib_index);
    else
      s = format (s, "\n");
  
    return s;
  }
  
  static uword
  clb_unformat_srv6_t_m_gtp4_dt (unformat_input_t * input, va_list * args)
  {
    void **plugin_mem_p = va_arg (*args, void **);
    srv6_t_gtp4_dt_param_t *ls_mem;
    u32 fib_index = 0;
    u32 local_fib_index = 0;
    u32 type;
  
    if (unformat (input, "t.m.gtp4.dt4 fib-table %u", &fib_index))
      {
        type = SRV6_GTP4_DT4;
      }
    else if (unformat (input, "t.m.gtp4.dt6 fib-table %u local-fib-table %u",
  		     &fib_index, &local_fib_index))
      {
        type = SRV6_GTP4_DT6;
      }
    else if (unformat (input, "t.m.gtp4.dt46 fib-table %u local-fib-table %u",
  		     &fib_index, &local_fib_index))
      {
        type = SRV6_GTP4_DT46;
      }
    else
      {
        return 0;
      }
  
    ls_mem = clib_mem_alloc_aligned_at_offset (sizeof *ls_mem, 0, 0, 1);
    clib_memset (ls_mem, 0, sizeof *ls_mem);
    *plugin_mem_p = ls_mem;
  
    ls_mem->fib4_index = fib_table_find (FIB_PROTOCOL_IP4, fib_index);
    ls_mem->fib6_index = fib_table_find (FIB_PROTOCOL_IP6, fib_index);
  
    if (type == SRV6_GTP4_DT6 || type == SRV6_GTP4_DT46)
      {
        ls_mem->local_fib_index =
  	fib_table_find (FIB_PROTOCOL_IP6, local_fib_index);
      }
  
    ls_mem->type = type;
  
    return 1;
  }
  
  static int
  clb_creation_srv6_t_m_gtp4_dt (ip6_sr_policy_t * sr_policy)
  {
    return 0;
  }
  
  static int
  clb_removal_srv6_t_m_gtp4_dt (ip6_sr_policy_t * sr_policy)
  {
    srv6_t_gtp4_dt_param_t *ls_mem;
  
    ls_mem = (srv6_t_gtp4_dt_param_t *) sr_policy->plugin_mem;
  
    clib_mem_free (ls_mem);
  
    return 0;
  }
  
  static clib_error_t *
  srv6_t_m_gtp4_dt_init (vlib_main_t * vm)
  {
    srv6_t_main_v4_dt_t *sm = &srv6_t_main_v4_dt;
    dpo_type_t dpo_type;
    vlib_node_t *node;
    int rc;
  
    sm->vlib_main = vm;
    sm->vnet_main = vnet_get_main ();
  
    node = vlib_get_node_by_name (vm, (u8 *) "srv6-t-m-gtp4-dt");
    sm->t_m_gtp4_dt_node_index = node->index;
  
    node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
    sm->error_node_index = node->index;
  
    dpo_type = dpo_register_new_type (&dpo_vft, dpo_nodes);
  
    rc = sr_policy_register_function (vm, fn_name, keyword_str, def_str, param_str, 128,	//prefix len
  				    &dpo_type,
  				    clb_format_srv6_t_m_gtp4_dt,
  				    clb_unformat_srv6_t_m_gtp4_dt,
  				    clb_creation_srv6_t_m_gtp4_dt,
  				    clb_removal_srv6_t_m_gtp4_dt);
    if (rc < 0)
      clib_error_return (0, "SRv6 Transit GTP4.DT Policy function"
  		       "couldn't be registered");
    return 0;
  }
  
  /* *INDENT-OFF* */
  VNET_FEATURE_INIT (srv6_t_m_gtp4_dt, static) =
  {
    .arc_name = "ip4-unicast",
    .node_name = "srv6-t-m-gtp4-dt",
    .runs_before = 0,
  };
  
  VLIB_INIT_FUNCTION (srv6_t_m_gtp4_dt_init);
  /* *INDENT-ON* */
  
  /*
   * fd.io coding-style-patch-verification: ON
   *
   * Local Variables:
   * eval: (c-set-style "gnu")
   * End:
   */
  