/*
 * Copyright (c) 2017 Cisco 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.
 */
/*
 *------------------------------------------------------------------
 * udp_ping_test.c - test harness for udp ping plugin
 *------------------------------------------------------------------
 */

#include <vat/vat.h>
#include <vlibapi/api.h>
#include <vlibmemory/api.h>
#include <vlibsocket/api.h>
#include <vppinfra/error.h>
#include <vnet/ip/ip.h>

/* Declare message IDs */
#include <ioam/udp-ping/udp_ping_msg_enum.h>

/* define message structures */
#define vl_typedefs
#include <ioam/udp-ping/udp_ping_all_api_h.h>
#undef vl_typedefs

/* declare message handlers for each api */

#define vl_endianfun		/* define message structures */
#include <ioam/udp-ping/udp_ping_all_api_h.h>
#undef vl_endianfun

/* instantiate all the print functions we know about */
#define vl_print(handle, ...)
#define vl_printfun
#include <ioam/udp-ping/udp_ping_all_api_h.h>
#undef vl_printfun

/* Get the API version number. */
#define vl_api_version(n,v) static u32 api_version=(v);
#include <ioam/udp-ping/udp_ping_all_api_h.h>
#undef vl_api_version


typedef struct
{
  /* API message ID base */
  u16 msg_id_base;
  vat_main_t *vat_main;
} udp_ping_test_main_t;

udp_ping_test_main_t udp_ping_test_main;

#define foreach_standard_reply_retval_handler     \
_(udp_ping_add_del_reply)                          \
_(udp_ping_export_reply)

#define _(n)                                            \
    static void vl_api_##n##_t_handler                  \
    (vl_api_##n##_t * mp)                               \
    {                                                   \
        vat_main_t * vam = udp_ping_test_main.vat_main;   \
        i32 retval = ntohl(mp->retval);                 \
        if (vam->async_mode) {                          \
            vam->async_errors += (retval < 0);          \
        } else {                                        \
            vam->retval = retval;                       \
            vam->result_ready = 1;                      \
        }                                               \
    }
foreach_standard_reply_retval_handler;
#undef _

/*
 * Table of message reply handlers, must include boilerplate handlers
 * we just generated
 */
#define foreach_vpe_api_reply_msg                                       \
_(UDP_PING_ADD_DEL_REPLY, udp_ping_add_del_reply)                         \
_(UDP_PING_EXPORT_REPLY, udp_ping_export_reply)                         \


/* M: construct, but don't yet send a message */

#define M(T,t)                                                  \
do {                                                            \
    vam->result_ready = 0;                                      \
    mp = vl_msg_api_alloc(sizeof(*mp));                         \
    memset (mp, 0, sizeof (*mp));                               \
    mp->_vl_msg_id = ntohs (VL_API_##T + sm->msg_id_base);      \
    mp->client_index = vam->my_client_index;                    \
} while(0);

/* S: send a message */
#define S (vl_msg_api_send_shmem (vam->vl_input_queue, (u8 *)&mp))

/* W: wait for results, with timeout */
#define W                                       \
do {                                            \
    timeout = vat_time_now (vam) + 5.0;         \
                                                \
    while (vat_time_now (vam) < timeout) {      \
        if (vam->result_ready == 1) {           \
            return (vam->retval);               \
        }                                       \
    }                                           \
    return -99;                                 \
} while(0);

static int
api_udp_ping_add_del_req (vat_main_t * vam)
{
  udp_ping_test_main_t *sm = &udp_ping_test_main;
  unformat_input_t *input = vam->input;
  vl_api_udp_ping_add_del_req_t *mp;
  int rv = 0;
  ip6_address_t dst, src;
  u32 start_src_port, end_src_port;
  u32 start_dst_port, end_dst_port;
  u32 interval;
  u8 is_disable = 0;
  f64 timeout;

  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
    {
      if (unformat (input, "src %U", unformat_ip6_address, &src))
	;
      else if (unformat (input, "start-src-port %d", &start_src_port))
	;
      else if (unformat (input, "end-src-port %d", &end_src_port))
	;
      else if (unformat (input, "start-dst-port %d", &start_dst_port))
	;
      else if (unformat (input, "end-dst-port %d", &end_dst_port))
	;
      else if (unformat (input, "dst %U", unformat_ip6_address, &dst))
	;
      else if (unformat (input, "interval %d", &interval))
	;
      else if (unformat (input, "disable"))
	is_disable = 1;
      else
	break;
    }

  M (UDP_PING_ADD_DEL_REQ, udp_ping_add);

  clib_memcpy (mp->src_ip_address, &src, 16);
  clib_memcpy (mp->dst_ip_address, &dst, 16);
  mp->start_src_port = (u16) start_src_port;
  mp->end_src_port = (u16) end_src_port;
  mp->start_dst_port = (u16) start_dst_port;
  mp->end_dst_port = (u16) end_dst_port;
  mp->interval = (u16) interval;
  mp->is_ipv4 = 0;
  mp->dis = is_disable;

  S;
  W;

  return (rv);
}

static int
api_udp_ping_export_req (vat_main_t * vam)
{
  udp_ping_test_main_t *sm = &udp_ping_test_main;
  unformat_input_t *input = vam->input;
  vl_api_udp_ping_export_req_t *mp;
  int rv = 0;
  int is_add = 1;
  f64 timeout;

  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
    {
      if (unformat (input, "export"))
	is_add = 1;
      else if (unformat (input, "disable"))
	is_add = 0;
      else
	break;
    }

  M (UDP_PING_EXPORT_REQ, udp_ping_export);

  mp->enable = is_add;

  S;
  W;

  return (rv);
}

/*
 * List of messages that the api test plugin sends,
 * and that the data plane plugin processes
 */
#define foreach_vpe_api_msg \
_(udp_ping_add_del_req, "src <local IPv6 address>  start-src-port <first local port> "\
  "end-src-port <last local port> " \
  "dst <remote IPv6 address> start-dst-port <first destination port> "\
  "end-dst-port <last destination port> "\
  "interval <time interval in sec for which ping packet will be sent> "\
  "[disable]")                         \
_(udp_ping_export_req, "export [disable]")                                         \


static void
udp_ping_test_api_hookup (vat_main_t * vam)
{
  udp_ping_test_main_t *sm = &udp_ping_test_main;
  /* Hook up handlers for replies from the data plane plug-in */
#define _(N,n)                                                  \
    vl_msg_api_set_handlers((VL_API_##N + sm->msg_id_base),     \
                           #n,                                  \
                           vl_api_##n##_t_handler,              \
                           vl_noop_handler,                     \
                           vl_api_##n##_t_endian,               \
                           vl_api_##n##_t_print,                \
                           sizeof(vl_api_##n##_t), 1);
  foreach_vpe_api_reply_msg;
#undef _

  /* API messages we can send */
#define _(n,h) hash_set_mem (vam->function_by_name, #n, api_##n);
  foreach_vpe_api_msg;
#undef _

  /* Help strings */
#define _(n,h) hash_set_mem (vam->help_by_name, #n, h);
  foreach_vpe_api_msg;
#undef _
}

clib_error_t *
vat_plugin_register (vat_main_t * vam)
{
  udp_ping_test_main_t *sm = &udp_ping_test_main;
  u8 *name;

  sm->vat_main = vam;

  name = format (0, "udp_ping_%08x%c", api_version, 0);
  sm->msg_id_base = vl_client_get_first_plugin_msg_id ((char *) name);

  if (sm->msg_id_base != (u16) ~ 0)
    udp_ping_test_api_hookup (vam);

  vec_free (name);

  return 0;
}

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */