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/*
 * Copyright (c) 2015 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.
 */
/*
 * buffer_funcs.h: VLIB buffer related functions/inlines
 *
 * Copyright (c) 2008 Eliot Dresselhaus
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef included_vlib_buffer_funcs_h
#define included_vlib_buffer_funcs_h

#include <vppinfra/hash.h>
#include <vppinfra/fifo.h>
#include <vlib/buffer.h>
#include <vlib/physmem_funcs.h>
#include <vlib/main.h>
#include <vlib/node.h>

/** \file
    vlib buffer access methods.
*/

always_inline void
vlib_buffer_validate (vlib_main_t * vm, vlib_buffer_t * b)
{
  vlib_buffer_main_t *bm = vm->buffer_main;
  vlib_buffer_pool_t *bp;

  /* reference count in allocated buffer always must be 1 or higher */
  ASSERT (b->ref_count > 0);

  /* verify that buffer pool index is valid */
  bp = vec_elt_at_index (bm->buffer_pools, b->buffer_pool_index);
  ASSERT (pointer_to_uword (b) >= bp->start);
  ASSERT (pointer_to_uword (b) < bp->start + bp->size -
	  (bp->data_size + sizeof (vlib_buffer_t)));
}

always_inline void *
vlib_buffer_ptr_from_index (uword buffer_mem_start, u32 buffer_index,
			    uword offset)
{
  offset += ((uword) buffer_index) << CLIB_LOG2_CACHE_LINE_BYTES;
  return uword_to_pointer (buffer_mem_start + offset, vlib_buffer_t *);
}

/** \brief Translate buffer index into buffer pointer

    @param vm - (vlib_main_t *) vlib main data structure pointer
    @param buffer_index - (u32) buffer index
    @return - (vlib_buffer_t *) buffer pointer
*/
always_inline vlib_buffer_t *
vlib_get_buffer (vlib_main_t * vm, u32 buffer_index)
{
  vlib_buffer_main_t *bm = vm->buffer_main;
  vlib_buffer_t *b;

  b = vlib_buffer_ptr_from_index (bm->buffer_mem_start, buffer_index, 0);
  vlib_buffer_validate (vm, b);
  return b;
}

static_always_inline u32
vlib_buffer_get_default_data_size (vlib_main_t * vm)
{
  return vm->buffer_main->default_data_size;
}

static_always_inline void
vlib_buffer_copy_indices (u32 * dst, u32 * src, u32 n_indices)
{
#if defined(CLIB_HAVE_VEC512)
  while (n_indices >= 16)
    {
      u32x16_store_unaligned (u32x16_load_unaligned (src), dst);
      dst += 16;
      src += 16;
      n_indices -= 16;
    }
#endif

#if defined(CLIB_HAVE_VEC256)
  while (n_indices >= 8)
    {
      u32x8_store_unaligned (u32x8_load_unaligned (src), dst);
      dst += 8;
      src += 8;
      n_indices -= 8;
    }
#endif

#if defined(CLIB_HAVE_VEC128)
  while (n_indices >= 4)
    {
      u32x4_store_unaligned (u32x4_load_unaligned (src), dst);
      dst += 4;
      src += 4;
      n_indices -= 4;
    }
#endif

  while (n_indices)
    {
      dst[0] = src[0];
      dst += 1;
      src += 1;
      n_indices -= 1;
    }
}

STATIC_ASSERT_OFFSET_OF (vlib_buffer_t, template_end, 64);
static_always_inline void
vlib_buffer_copy_template (vlib_buffer_t * b, vlib_buffer_t * bt)
{
#if defined CLIB_HAVE_VEC512
  b->as_u8x64[0] = bt->as_u8x64[0];
#elif defined (CLIB_HAVE_VEC256)
  b->as_u8x32[0] = bt->as_u8x32[0];
  b->as_u8x32[1] = bt->as_u8x32[1];
#elif defined (CLIB_HAVE_VEC128)
  b->as_u8x16[0] = bt->as_u8x16[0];
  b->as_u8x16[1] = bt->as_u8x16[1];
  b->as_u8x16[2] = bt->as_u8x16[2];
  b->as_u8x16[3] = bt->as_u8x16[3];
#else
  clib_memcpy_fast (b, bt, 64);
#endif
}

always_inline u8
vlib_buffer_pool_get_default_for_numa (vlib_main_t * vm, u32 numa_node)
{
  ASSERT (numa_node < VLIB_BUFFER_MAX_NUMA_NODES);
  return vm->buffer_main->default_buffer_pool_index_for_numa[numa_node];
}

/** \brief Translate array of buffer indices into buffer pointers with offset

    @param vm - (vlib_main_t *) vlib main data structure pointer
    @param bi - (u32 *) array of buffer indices
    @param b - (void **) array to store buffer pointers
    @param count - (uword) number of elements
    @param offset - (i32) offset applied to each pointer
*/
static_always_inline void
vlib_get_buffers_with_offset (vlib_main_t * vm, u32 * bi, void **b, int count,
			      i32 offset)
{
  uword buffer_mem_start = vm->buffer_main->buffer_mem_start;
#ifdef CLIB_HAVE_VEC256
  u64x4 off = u64x4_splat (buffer_mem_start + offset);
  /* if count is not const, compiler will not unroll while loop
     se we maintain two-in-parallel variant */
  while (count >= 8)
    {
      u64x4 b0 = u32x4_extend_to_u64x4 (u32x4_load_unaligned (bi));
      u64x4 b1 = u32x4_extend_to_u64x4 (u32x4_load_unaligned (bi + 4));
      /* shift and add to get vlib_buffer_t pointer */
      u64x4_store_unaligned ((b0 << CLIB_LOG2_CACHE_LINE_BYTES) + off, b);
      u64x4_store_unaligned ((b1 << CLIB_LOG2_CACHE_LINE_BYTES) + off, b + 4);
      b += 8;
      bi += 8;
      count -= 8;
    }
#endif
  while (count >= 4)
    {
#ifdef CLIB_HAVE_VEC256
      u64x4 b0 = u32x4_extend_to_u64x4 (u32x4_load_unaligned (bi));
      /* shift and add to get vlib_buffer_t pointer */
      u64x4_store_unaligned ((b0 << CLIB_LOG2_CACHE_LINE_BYTES) + off, b);
#elif defined (CLIB_HAVE_VEC128)
      u64x2 off = u64x2_splat (buffer_mem_start + offset);
      u32x4 bi4 = u32x4_load_unaligned (bi);
      u64x2 b0 = u32x4_extend_to_u64x2 ((u32x4) bi4);
#if defined (__aarch64__)
      u64x2 b1 = u32x4_extend_to_u64x2_high ((u32x4) bi4);
#else
      bi4 = u32x4_shuffle (bi4, 2, 3, 0, 1);
      u64x2 b1 = u32x4_extend_to_u64x2 ((u32x4) bi4);
#endif
      u64x2_store_unaligned ((b0 << CLIB_LOG2_CACHE_LINE_BYTES) + off, b);
      u64x2_store_unaligned ((b1 << CLIB_LOG2_CACHE_LINE_BYTES) + off, b + 2);
#else
      b[0] = vlib_buffer_ptr_from_index (buffer_mem_start, bi[0], offset);
      b[1] = vlib_buffer_ptr_from_index (buffer_mem_start, bi[1], offset);
      b[2] = vlib_buffer_ptr_from_index (buffer_mem_start, bi[2], offset);
      b[3] = vlib_buffer_ptr_from_index (buffer_mem_start, bi[3], offset);
#endif
      b += 4;
      bi += 4;
      count -= 4;
    }
  while (count)
    {
      b[0] = vlib_buffer_ptr_from_index (buffer_mem_start, bi[0], offset);
      b += 1;
      bi += 1;
      count -= 1;
    }
}

/** \brief Translate array of buffer indices into buffer pointers

    @param vm - (vlib_main_t *) vlib main data structure pointer
    @param bi - (u32 *) array of buffer indices
    @param b - (vlib_buffer_t **) array to store buffer pointers
    @param count - (uword) number of elements
*/

static_always_inline void
vlib_get_buffers (vlib_main_t * vm, u32 * bi, vlib_buffer_t ** b, int count)
{
  vlib_get_buffers_with_offset (vm, bi, (void **) b, count, 0);
}

/** \brief Translate buffer pointer into buffer index

    @param vm - (vlib_main_t *) vlib main data structure pointer
    @param p - (void *) buffer pointer
    @return - (u32) buffer index
*/

always_inline u32
vlib_get_buffer_index (vlib_main_t * vm, void *p)
{
  vlib_buffer_main_t *bm = vm->buffer_main;
  uword offset = pointer_to_uword (p) - bm->buffer_mem_start;
  ASSERT (pointer_to_uword (p) >= bm->buffer_mem_start);
  ASSERT (offset < bm->buffer_mem_size);
  ASSERT ((offset % (1 << CLIB_LOG2_CACHE_LINE_BYTES)) == 0);
  return offset >> CLIB_LOG2_CACHE_LINE_BYTES;
}

/** \brief Translate array of buffer pointers into buffer indices with offset

    @param vm - (vlib_main_t *) vlib main data structure pointer
    @param b - (void **) array of buffer pointers
    @param bi - (u32 *) array to store buffer indices
    @param count - (uword) number of elements
    @param offset - (i32) offset applied to each pointer
*/
static_always_inline void
vlib_get_buffer_indices_with_offset (vlib_main_t * vm, void **b, u32 * bi,
				     uword count, i32 offset)
{
#ifdef CLIB_HAVE_VEC256
  u32x8 mask = { 0, 2, 4, 6, 1, 3, 5, 7 };
  u64x4 off4 = u64x4_splat (vm->buffer_main->buffer_mem_start - offset);

  while (count >= 8)
    {
      /* load 4 pointers into 256-bit register */
      u64x4 v0 = u64x4_load_unaligned (b);
      u64x4 v1 = u64x4_load_unaligned (b + 4);
      u32x8 v2, v3;

      v0 -= off4;
      v1 -= off4;

      v0 >>= CLIB_LOG2_CACHE_LINE_BYTES;
      v1 >>= CLIB_LOG2_CACHE_LINE_BYTES;

      /* permute 256-bit register so lower u32s of each buffer index are
       * placed into lower 128-bits */
      v2 = u32x8_permute ((u32x8) v0, mask);
      v3 = u32x8_permute ((u32x8) v1, mask);

      /* extract lower 128-bits and save them to the array of buffer indices */
      u32x4_store_unaligned (u32x8_extract_lo (v2), bi);
      u32x4_store_unaligned (u32x8_extract_lo (v3), bi + 4);
      bi += 8;
      b += 8;
      count -= 8;
    }
#endif
  while (count >= 4)
    {
      /* equivalent non-nector implementation */
      bi[0] = vlib_get_buffer_index (vm, ((u8 *) b[0]) + offset);
      bi[1] = vlib_get_buffer_index (vm, ((u8 *) b[1]) + offset);
      bi[2] = vlib_get_buffer_index (vm, ((u8 *) b[2]) + offset);
      bi[3] = vlib_get_buffer_index (vm, ((u8 *) b[3]) + offset);
      bi += 4;
      b += 4;
      count -= 4;
    }
  while (count)
    {
      bi[0] = vlib_get_buffer_index (vm, ((u8 *) b[0]) + offset);
      bi += 1;
      b += 1;
      count -= 1;
    }
}

/** \brief Translate array of buffer pointers into buffer indices

    @param vm - (vlib_main_t *) vlib main data structure pointer
    @param b - (vlib_buffer_t **) array of buffer pointers
    @param bi - (u32 *) array to store buffer indices
    @param count - (uword) number of elements
*/
static_always_inline void
vlib_get_buffer_indices (vlib_main_t * vm, vlib_buffer_t ** b, u32 * bi,
			 uword count)
{
  vlib_get_buffer_indices_with_offset (vm, (void **) b, bi, count, 0);
}

/** \brief Get next buffer in buffer linklist, or zero for end of list.

    @param vm - (vlib_main_t *) vlib main data structure pointer
    @param b - (void *) buffer pointer
    @return - (vlib_buffer_t *) next buffer, or NULL
*/
always_inline vlib_buffer_t *
vlib_get_next_buffer (vlib_main_t * vm, vlib_buffer_t * b)
{
  return (b->flags & VLIB_BUFFER_NEXT_PRESENT
	  ? vlib_get_buffer (vm, b->next_buffer) : 0);
}

uword vlib_buffer_length_in_chain_slow_path (vlib_main_t * vm,
					     vlib_buffer_t * b_first);

/** \brief Get length in bytes of the buffer chain

    @param vm - (vlib_main_t *) vlib main data structure pointer
    @param b - (void *) buffer pointer
    @return - (uword) length of buffer chain
*/
always_inline uword
vlib_buffer_length_in_chain (vlib_main_t * vm, vlib_buffer_t * b)
{
  uword len = b->current_length;

  if (PREDICT_TRUE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) == 0))
    return len;

  if (PREDICT_TRUE (b->flags & VLIB_BUFFER_TOTAL_LENGTH_VALID))
    return len + b->total_length_not_including_first_buffer;

  return vlib_buffer_length_in_chain_slow_path (vm, b);
}

/** \brief Get length in bytes of the buffer index buffer chain

    @param vm - (vlib_main_t *) vlib main data structure pointer
    @param bi - (u32) buffer index
    @return - (uword) length of buffer chain
*/
always_inline uword
vlib_buffer_index_length_in_chain (vlib_main_t * vm, u32 bi)
{
  vlib_buffer_t *b = vlib_get_buffer (vm, bi);
  return vlib_buffer_length_in_chain (vm, b);
}

/** \brief Copy buffer contents to memory

    @param vm - (vlib_main_t *) vlib main data structure pointer
    @param buffer_index - (u32) buffer index
    @param contents - (u8 *) memory, <strong>must be large enough</strong>
    @return - (uword) length of buffer chain
*/
always_inline uword
vlib_buffer_contents (vlib_main_t * vm, u32 buffer_index, u8 * contents)
{
  uword content_len = 0;
  uword l;
  vlib_buffer_t *b;

  while (1)
    {
      b = vlib_get_buffer (vm, buffer_index);
      l = b->current_length;
      clib_memcpy_fast (contents + content_len, b->data + b->current_data, l);
      content_len += l;
      if (!(b->flags & VLIB_BUFFER_NEXT_PRESENT))
	break;
      buffer_index = b->next_buffer;
    }

  return content_len;
}

always_inline uword
vlib_buffer_get_pa (vlib_main_t * vm, vlib_buffer_t * b)
{
  return vlib_physmem_get_pa (vm, b->data);
}

always_inline uword
vlib_buffer_get_current_pa (vlib_main_t * vm, vlib_buffer_t * b)
{
  return vlib_buffer_get_pa (vm, b) + b->current_data;
}

/** \brief Prefetch buffer metadata by buffer index
    The first 64 bytes of buffer contains most header information

    @param vm - (vlib_main_t *) vlib main data structure pointer
    @param bi - (u32) buffer index
    @param type - LOAD, STORE. In most cases, STORE is the right answer
*/
/* Prefetch buffer header given index. */
#define vlib_prefetch_buffer_with_index(vm,bi,type)	\
  do {							\
    vlib_buffer_t * _b = vlib_get_buffer (vm, bi);	\
    vlib_prefetch_buffer_header (_b, type);		\
  } while (0)

typedef enum
{
  /* Index is unknown. */
  VLIB_BUFFER_UNKNOWN,

  /* Index is known and free/allocated. */
  VLIB_BUFFER_KNOWN_FREE,
  VLIB_BUFFER_KNOWN_ALLOCATED,
} vlib_buffer_known_state_t;

void vlib_buffer_validate_alloc_free (vlib_main_t * vm, u32 * buffers,
				      uword n_buffers,
				      vlib_buffer_known_state_t
				      expected_state);

always_inline vlib_buffer_known_state_t
vlib_buffer_is_known (vlib_main_t * vm, u32 buffer_index)
{
  vlib_buffer_main_t *bm = vm->buffer_main;

  clib_spinlock_lock (&bm->buffer_known_hash_lockp);
  uword *p = hash_get (bm->buffer_known_hash, buffer_index);
  clib_spinlock_unlock (&bm->buffer_known_hash_lockp);
  return p ? p[0] : VLIB_BUFFER_UNKNOWN;
}

/* Validates sanity of a single buffer.
   Returns format'ed vector with error message if any. */
u8 *vlib_validate_buffer (vlib_main_t * vm, u32 buffer_index,
			  uword follow_chain);

static_always_inline vlib_buffer_pool_t *
vlib_get_buffer_pool (vlib_main_t * vm, u8 buffer_pool_index)
{
  vlib_buffer_main_t *bm = vm->buffer_main;
  return vec_elt_at_index (bm->buffer_pools, buffer_pool_index);
}

static_always_inline uword
vlib_buffer_pool_get (vlib_main_t * vm, u8 buffer_pool_index, u32 * buffers,
		      u32 n_buffers)
{
  vlib_buffer_pool_t *bp = vlib_get_buffer_pool (vm, buffer_pool_index);
  u32 len;

  ASSERT (bp->buffers);

  clib_spinlock_lock (&bp->lock);
  len = vec_len (bp->buffers);
  if (PREDICT_TRUE (n_buffers < len))
    {
      len -= n_buffers;
      vlib_buffer_copy_indices (buffers, bp->buffers + len, n_buffers);
      _vec_len (bp->buffers) = len;
      clib_spinlock_unlock (&bp->lock);
      return n_buffers;
    }
  else
    {
      vlib_buffer_copy_indices (buffers, bp->buffers, len);
      _vec_len (bp->buffers) = 0;
      clib_spinlock_unlock (&bp->lock);
      return len;
    }
}


/** \brief Allocate buffers from specific pool into supplied array

    @param vm - (vlib_main_t *) vlib main data structure pointer
    @param buffers - (u32 * ) buffer index array
    @param n_buffers - (u32) number of buffers requested
    @return - (u32) number of buffers actually allocated, may be
    less than the number requested or zero
*/

always_inline u32
vlib_buffer_alloc_from_pool (vlib_main_t * vm, u32 * buffers, u32 n_buffers,
			     u8 buffer_pool_index)
{
  vlib_buffer_main_t *bm = vm->buffer_main;
  vlib_buffer_pool_t *bp;
  vlib_buffer_pool_thread_t *bpt;
  u32 *src, *dst, len, n_left;

  bp = vec_elt_at_index (bm->buffer_pools, buffer_pool_index);
  bpt = vec_elt_at_index (bp->threads, vm->thread_index);

  dst = buffers;
  n_left = n_buffers;
  len = vec_len (bpt->cached_buffers);

  /* per-thread cache contains enough buffers */
  if (len >= n_buffers)
    {
      src = bpt->cached_buffers + len - n_buffers;
      vlib_buffer_copy_indices (dst, src, n_buffers);
      _vec_len (bpt->cached_buffers) -= n_buffers;

      if (CLIB_DEBUG > 0)
	vlib_buffer_validate_alloc_free (vm, buffers, n_buffers,
					 VLIB_BUFFER_KNOWN_FREE);
      return n_buffers;
    }

  /* take everything available in the cache */
  if (len)
    {
      vlib_buffer_copy_indices (dst, bpt->cached_buffers, len);
      _vec_len (bpt->cached_buffers) = 0;
      dst += len;
      n_left -= len;
    }

  len = round_pow2 (n_left, 32);
  vec_validate_aligned (bpt->cached_buffers, len - 1, CLIB_CACHE_LINE_BYTES);
  len = vlib_buffer_pool_get (vm, buffer_pool_index, bpt->cached_buffers,
			      len);
  _vec_len (bpt->cached_buffers) = len;

  if (len)
    {
      u32 n_copy = clib_min (len, n_left);
      src = bpt->cached_buffers + len - n_copy;
      vlib_buffer_copy_indices (dst, src, n_copy);
      _vec_len (bpt->cached_buffers) -= n_copy;
      n_left -= n_copy;
    }

  n_buffers -= n_left;

  /* Verify that buffers are known free. */
  if (CLIB_DEBUG > 0)
    vlib_buffer_validate_alloc_free (vm, buffers, n_buffers,
				     VLIB_BUFFER_KNOWN_FREE);

  return n_buffers;
}

/** \brief Allocate buffers from specific numa node into supplied array

    @param vm - (vlib_main_t *) vlib main data structure pointer
    @param buffers - (u32 * ) buffer index array
    @param n_buffers - (u32) number of buffers requested
    @param numa_node - (u32) numa node
    @return - (u32) number of buffers actually allocated, may be
    less than the number requested or zero
*/
always_inline u32
vlib_buffer_alloc_on_numa (vlib_main_t * vm, u32 * buffers, u32 n_buffers,
			   u32 numa_node)
{
  u8 index = vlib_buffer_pool_get_default_for_numa (vm, numa_node);
  return vlib_buffer_alloc_from_pool (vm, buffers, n_buffers, index);
}

/** \brief Allocate buffers into supplied array

    @param vm - (vlib_main_t *) vlib main data structure pointer
    @param buffers - (u32 * ) buffer index array
    @param n_buffers - (u32) number of buffers requested
    @return - (u32) number of buffers actually allocated, may be
    less than the number requested or zero
*/

always_inline u32
vlib_buffer_alloc (vlib_main_t * vm, u32 * buffers, u32 n_buffers)
{
  return vlib_buffer_alloc_on_numa (vm, buffers, n_buffers, vm->numa_node);
}

/** \brief Allocate buffers into ring

    @param vm - (vlib_main_t *) vlib main data structure pointer
    @param buffers - (u32 * ) buffer index ring
    @param start - (u32) first slot in the ring
    @param ring_size - (u32) ring size
    @param n_buffers - (u32) number of buffers requested
    @return - (u32) number of buffers actually allocated, may be
    less than the number requested or zero
*/
always_inline u32
vlib_buffer_alloc_to_ring (vlib_main_t * vm, u32 * ring, u32 start,
			   u32 ring_size, u32 n_buffers)
{
  u32 n_alloc;

  ASSERT (n_buffers <= ring_size);

  if (PREDICT_TRUE (start + n_buffers <= ring_size))
    return vlib_buffer_alloc (vm, ring + start, n_buffers);

  n_alloc = vlib_buffer_alloc (vm, ring + start, ring_size - start);

  if (PREDICT_TRUE (n_alloc == ring_size - start))
    n_alloc += vlib_buffer_alloc (vm, ring, n_buffers - n_alloc);

  return n_alloc;
}

/** \brief Allocate buffers into ring from specific buffer pool

    @param vm - (vlib_main_t *) vlib main data structure pointer
    @param buffers - (u32 * ) buffer index ring
    @param start - (u32) first slot in the ring
    @param ring_size - (u32) ring size
    @param n_buffers - (u32) number of buffers requested
    @return - (u32) number of buffers actually allocated, may be
    less than the number requested or zero
*/
always_inline u32
vlib_buffer_alloc_to_ring_from_pool (vlib_main_t * vm, u32 * ring, u32 start,
				     u32 ring_size, u32 n_buffers,
				     u8 buffer_pool_index)
{
  u32 n_alloc;

  ASSERT (n_buffers <= ring_size);

  if (PREDICT_TRUE (start + n_buffers <= ring_size))
    return vlib_buffer_alloc_from_pool (vm, ring + start, n_buffers,
					buffer_pool_index);

  n_alloc = vlib_buffer_alloc_from_pool (vm, ring + start, ring_size - start,
					 buffer_pool_index);

  if (PREDICT_TRUE (n_alloc == ring_size - start))
    n_alloc += vlib_buffer_alloc_from_pool (vm, ring, n_buffers - n_alloc,
					    buffer_pool_index);

  return n_alloc;
}

static_always_inline void
vlib_buffer_pool_put (vlib_main_t * vm, u8 buffer_pool_index,
		      u32 * buffers, u32 n_buffers)
{
  vlib_buffer_pool_t *bp = vlib_get_buffer_pool (vm, buffer_pool_index);
  vlib_buffer_pool_thread_t *bpt =
    vec_elt_at_index (bp->threads, vm->thread_index);

  if (CLIB_DEBUG > 0)
    vlib_buffer_validate_alloc_free (vm, buffers, n_buffers,
				     VLIB_BUFFER_KNOWN_ALLOCATED);

  vec_add_aligned (bpt->cached_buffers, buffers, n_buffers,
		   CLIB_CACHE_LINE_BYTES);

  if (vec_len (bpt->cached_buffers) > 4 * VLIB_FRAME_SIZE)
    {
      clib_spinlock_lock (&bp->lock);
      /* keep last stored buffers, as they are more likely hot in the cache */
      vec_add_aligned (bp->buffers, bpt->cached_buffers, VLIB_FRAME_SIZE,
		       CLIB_CACHE_LINE_BYTES);
      vec_delete (bpt->cached_buffers, VLIB_FRAME_SIZE, 0);
      bpt->n_alloc -= VLIB_FRAME_SIZE;
      clib_spinlock_unlock (&bp->lock);
    }
}

static_always_inline void
vlib_buffer_free_inline (vlib_main_t * vm, u32 * buffers, u32 n_buffers,
			 int maybe_next)
{
  const int queue_size = 128;
  vlib_buffer_pool_t *bp = 0;
  u8 buffer_pool_index = ~0;
  u32 n_queue = 0, queue[queue_size + 4];
  vlib_buffer_t bt = { };
#if defined(CLIB_HAVE_VEC128) && !__aarch64__
  vlib_buffer_t bpi_mask = {.buffer_pool_index = ~0 };
  vlib_buffer_t bpi_vec = {.buffer_pool_index = ~0 };
  vlib_buffer_t flags_refs_mask = {
    .flags = VLIB_BUFFER_NEXT_PRESENT,
    .ref_count = ~1
  };
#endif

  while (n_buffers)
    {
      vlib_buffer_t *b[8];
      u32 bi, sum = 0, flags, next;

      if (n_buffers < 12)
	goto one_by_one;

      vlib_get_buffers (vm, buffers, b, 4);
      vlib_get_buffers (vm, buffers + 8, b + 4, 4);

      vlib_prefetch_buffer_header (b[4], LOAD);
      vlib_prefetch_buffer_header (b[5], LOAD);
      vlib_prefetch_buffer_header (b[6], LOAD);
      vlib_prefetch_buffer_header (b[7], LOAD);

#if defined(CLIB_HAVE_VEC128) && !__aarch64__
      u8x16 p0, p1, p2, p3, r;
      p0 = u8x16_load_unaligned (b[0]);
      p1 = u8x16_load_unaligned (b[1]);
      p2 = u8x16_load_unaligned (b[2]);
      p3 = u8x16_load_unaligned (b[3]);

      r = p0 ^ bpi_vec.as_u8x16[0];
      r |= p1 ^ bpi_vec.as_u8x16[0];
      r |= p2 ^ bpi_vec.as_u8x16[0];
      r |= p3 ^ bpi_vec.as_u8x16[0];
      r &= bpi_mask.as_u8x16[0];
      r |= (p0 | p1 | p2 | p3) & flags_refs_mask.as_u8x16[0];

      sum = !u8x16_is_all_zero (r);
#else
      sum |= b[0]->flags;
      sum |= b[1]->flags;
      sum |= b[2]->flags;
      sum |= b[3]->flags;
      sum &= VLIB_BUFFER_NEXT_PRESENT;
      sum += b[0]->ref_count - 1;
      sum += b[1]->ref_count - 1;
      sum += b[2]->ref_count - 1;
      sum += b[3]->ref_count - 1;
      sum |= b[0]->buffer_pool_index ^ buffer_pool_index;
      sum |= b[1]->buffer_pool_index ^ buffer_pool_index;
      sum |= b[2]->buffer_pool_index ^ buffer_pool_index;
      sum |= b[3]->buffer_pool_index ^ buffer_pool_index;
#endif

      if (sum)
	goto one_by_one;

      vlib_buffer_copy_indices (queue + n_queue, buffers, 4);
      vlib_buffer_copy_template (b[0], &bt);
      vlib_buffer_copy_template (b[1], &bt);
      vlib_buffer_copy_template (b[2], &bt);
      vlib_buffer_copy_template (b[3], &bt);
      n_queue += 4;

      vlib_buffer_validate (vm, b[0]);
      vlib_buffer_validate (vm, b[1]);
      vlib_buffer_validate (vm, b[2]);
      vlib_buffer_validate (vm, b[3]);

      VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b[0]);
      VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b[1]);
      VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b[2]);
      VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b[3]);

      if (n_queue >= queue_size)
	{
	  vlib_buffer_pool_put (vm, buffer_pool_index, queue, n_queue);
	  n_queue = 0;
	}
      buffers += 4;
      n_buffers -= 4;
      continue;

    one_by_one:
      bi = buffers[0];

    next_in_chain:
      b[0] = vlib_get_buffer (vm, bi);
      flags = b[0]->flags;
      next = b[0]->next_buffer;

      if (PREDICT_FALSE (buffer_pool_index != b[
import os
import time
from collections import deque

from six import moves
from vpp_papi import VPP, mac_pton
from hook import Hook
from vpp_l2 import L2_PORT_TYPE

# from vnet/vnet/mpls/mpls_types.h
MPLS_IETF_MAX_LABEL = 0xfffff
MPLS_LABEL_INVALID = MPLS_IETF_MAX_LABEL + 1


class L2_VTR_OP:
    L2_DISABLED = 0
    L2_PUSH_1 = 1
    L2_PUSH_2 = 2
    L2_POP_1 = 3
    L2_POP_2 = 4
    L2_TRANSLATE_1_1 = 5
    L2_TRANSLATE_1_2 = 6
    L2_TRANSLATE_2_1 = 7
    L2_TRANSLATE_2_2 = 8


class QOS_SOURCE:
    EXT = 0
    VLAN = 1
    MPLS = 2
    IP = 3


class SYSLOG_SEVERITY:
    EMERG = 0
    ALERT = 1
    CRIT = 2
    ERR = 3
    WARN = 4
    NOTICE = 5
    INFO = 6
    DBG = 7


class UnexpectedApiReturnValueError(Exception):
    """ exception raised when the API return value is unexpected """
    pass


class VppPapiProvider(object):
    """VPP-api provider using vpp-papi

    @property hook: hook object providing before and after api/cli hooks
    """

    _zero, _negative = range(2)

    def __init__(self, name, shm_prefix, test_class, read_timeout):
        self.hook = Hook(test_class)
        self.name = name
        self.shm_prefix = shm_prefix
        self.test_class = test_class
        self._expect_api_retval = self._zero
        self._expect_stack = []

        install_dir = os.getenv('VPP_INSTALL_PATH')

        # Vapi requires 'VPP_API_DIR', not set when run from Makefile.
        if 'VPP_API_DIR' not in os.environ:
            os.environ['VPP_API_DIR'] = os.getenv('VPP_INSTALL_PATH')

        self.vpp = VPP(logger=test_class.logger,
                       read_timeout=read_timeout)
        self._events = deque()

    def __enter__(self):
        return self

    def assert_negative_api_retval(self):
        """ Expect API failure - used with with, e.g.:
            with self.vapi.assert_negative_api_retval():
                self.vapi.<api call expected to fail>
        """
        self._expect_stack.append(self._expect_api_retval)
        self._expect_api_retval = self._negative
        return self

    def assert_zero_api_retval(self):
        """ Expect API success - used with with, e.g.:
            with self.vapi.assert_negative_api_retval():
                self.vapi.<api call expected to succeed>

            note: this is useful only inside another with block
                  as success is the default expected value
        """
        self._expect_stack.append(self._expect_api_retval)
        self._expect_api_retval = self._zero
        return self

    def __exit__(self, exc_type, exc_value, traceback):
        self._expect_api_retval = self._expect_stack.pop()

    def register_hook(self, hook):
        """Replace hook registration with new hook

        :param hook:

        """
        self.hook = hook

    def collect_events(self):
        """ Collect all events from the internal queue and clear the queue. """
        e = self._events
        self._events = deque()
        return e

    def wait_for_event(self, timeout, name=None):
        """ Wait for and return next event. """
        if name:
            self.test_class.logger.debug("Expecting event '%s' within %ss",
                                         name, timeout)
        else:
            self.test_class.logger.debug("Expecting event within %ss",
                                         timeout)
        if self._events:
            self.test_class.logger.debug("Not waiting, event already queued")
        limit = time.time() + timeout
        while time.time() < limit:
            if self._events:
                e = self._events.popleft()
                if name and type(e).__name__ != name:
                    raise Exception(
                        "Unexpected event received: %s, expected: %s" %
                        (type(e).__name__, name))
                self.test_class.logger.debug("Returning event %s:%s" %
                                             (name, e))
                return e
            time.sleep(0)  # yield
        raise Exception("Event did not occur within timeout")

    def __call__(self, name, event):
        """ Enqueue event in the internal event queue. """
        # FIXME use the name instead of relying on type(e).__name__ ?
        # FIXME #2 if this throws, it is eaten silently, Ole?
        self.test_class.logger.debug("New event: %s: %s" % (name, event))
        self._events.append(event)

    def connect(self):
        """Connect the API to VPP"""
        self.vpp.connect(self.name, self.shm_prefix)
        self.papi = self.vpp.api
        self.vpp.register_event_callback(self)

    def disconnect(self):
        """Disconnect the API from VPP"""
        self.vpp.disconnect()

    def api(self, api_fn, api_args, expected_retval=0):
        """ Call API function and check it's return value.
        Call the appropriate hooks before and after the API call

        :param api_fn: API function to call
        :param api_args: tuple of API function arguments
        :param expected_retval: Expected return value (Default value = 0)
        :returns: reply from the API

        """
        self.hook.before_api(api_fn.__name__, api_args)
        reply = api_fn(**api_args)
        if self._expect_api_retval == self._negative:
            if hasattr(reply, 'retval') and reply.retval >= 0:
                msg = "API call passed unexpectedly: expected negative "\
                    "return value instead of %d in %s" % \
                    (reply.retval, moves.reprlib.repr(reply))
                self.test_class.logger.info(msg)
                raise UnexpectedApiReturnValueError(msg)
        elif self._expect_api_retval == self._zero:
            if hasattr(reply, 'retval') and reply.retval != expected_retval:
                msg = "API call failed, expected %d return value instead "\
                    "of %d in %s" % (expected_retval, reply.retval,
                                     moves.reprlib.repr(reply))
                self.test_class.logger.info(msg)
                raise UnexpectedApiReturnValueError(msg)
        else:
            raise Exception("Internal error, unexpected value for "
                            "self._expect_api_retval %s" %
                            self._expect_api_retval)
        self.hook.after_api(api_fn.__name__, api_args)
        return reply

    def cli(self, cli):
        """ Execute a CLI, calling the before/after hooks appropriately.

        :param cli: CLI to execute
        :returns: CLI output

        """
        self.hook.before_cli(cli)
        cli += '\n'
        r = self.papi.cli_inband(cmd=cli)
        self.hook.after_cli(cli)
        if hasattr(r, 'reply'):
            return r.reply

    def ppcli(self, cli):
        """ Helper method to print CLI command in case of info logging level.

        :param cli: CLI to execute
        :returns: CLI output
        """
        return cli + "\n" + str(self.cli(cli))

    def show_version(self):
        """ """
        return self.api(self.papi.show_version, {})

    def pg_create_interface(self, pg_index):
        """

        :param pg_index:

        """
        return self.api(self.papi.pg_create_interface,
                        {"interface_id": pg_index})

    def sw_interface_dump(self, filter=None):
        """

        :param filter:  (Default value = None)

        """
        if filter is not None:
            args = {"name_filter_valid": 1, "name_filter": filter}
        else:
            args = {}
        return self.api(self.papi.sw_interface_dump, args)

    def sw_interface_set_table(self, sw_if_index, is_ipv6, table_id):
        """ Set the IPvX Table-id for the Interface

        :param sw_if_index:
        :param is_ipv6:
        :param table_id:

        """
        return self.api(self.papi.sw_interface_set_table,
                        {'sw_if_index': sw_if_index, 'is_ipv6': is_ipv6,
                         'vrf_id': table_id})

    def sw_interface_get_table(self, sw_if_index, is_ipv6):
        """ Get the IPvX Table-id for the Interface

        :param sw_if_index:
        :param is_ipv6:
        :return table_id

        """
        return self.api(self.papi.sw_interface_get_table,
                        {'sw_if_index': sw_if_index, 'is_ipv6': is_ipv6})

    def sw_interface_add_del_address(self, sw_if_index, addr, addr_len,
                                     is_ipv6=0, is_add=1, del_all=0):
        """

        :param addr: param is_ipv6:  (Default value = 0)
        :param sw_if_index:
        :param addr_len:
        :param is_ipv6:  (Default value = 0)
        :param is_add:  (Default value = 1)
        :param del_all:  (Default value = 0)

        """
        return self.api(self.papi.sw_interface_add_del_address,
                        {'sw_if_index': sw_if_index,
                         'is_add': is_add,
                         'is_ipv6': is_ipv6,
                         'del_all': del_all,
                         'address_length': addr_len,
                         'address': addr})

    def ip_address_dump(self, sw_if_index, is_ipv6=0):
        return self.api(self.papi.ip_address_dump,
                        {'sw_if_index': sw_if_index,
                         'is_ipv6': is_ipv6})

    def sw_interface_set_unnumbered(self, sw_if_index, ip_sw_if_index,
                                    is_add=1):
        """ Set the Interface to be unnumbered

        :param is_add:  (Default value = 1)
        :param sw_if_index - interface That will be unnumbered
        :param ip_sw_if_index - interface with an IP addres

        """
        return self.api(self.papi.sw_interface_set_unnumbered,
                        {'sw_if_index': ip_sw_if_index,
                         'unnumbered_sw_if_index': sw_if_index,
                         'is_add': is_add})

    def ip_unnumbered_dump(self, sw_if_index=0xffffffff):
        return self.api(self.papi.ip_unnumbered_dump,
                        {'sw_if_index': sw_if_index})

    def sw_interface_enable_disable_mpls(self, sw_if_index,
                                         is_enable=1):
        """
        Enable/Disable MPLS on the interface
        :param sw_if_index:
        :param is_enable:  (Default value = 1)

        """
        return self.api(self.papi.sw_interface_set_mpls_enable,
                        {'sw_if_index': sw_if_index,
                         'enable': is_enable})

    def sw_interface_ra_suppress(self, sw_if_index, suppress=1):
        return self.api(self.papi.sw_interface_ip6nd_ra_config,
                        {'sw_if_index': sw_if_index,
                         'suppress': suppress})

    def set_ip_flow_hash(self,
                         table_id,
                         src=1,
                         dst=1,
                         sport=1,
                         dport=1,
                         proto=1,
                         reverse=0,
                         is_ip6=0):
        return self.api(self.papi.set_ip_flow_hash,
                        {'vrf_id': table_id,
                         'src': src,
                         'dst': dst,
                         'dport': dport,
                         'sport': sport,
                         'proto': proto,
                         'reverse': reverse,
                         'is_ipv6': is_ip6})

    def ip6_nd_proxy(self, ip, sw_if_index, is_del=0):
        return self.api(self.papi.ip6nd_proxy_add_del,
                        {'ip': ip,
                         'sw_if_index': sw_if_index,
                         'is_del': is_del})

    def ip6_sw_interface_ra_config(self, sw_if_index,
                                   no,
                                   suppress,
                                   send_unicast):
        return self.api(self.papi.sw_interface_ip6nd_ra_config,
                        {'sw_if_index': sw_if_index,
                         'is_no': no,
                         'suppress': suppress,
                         'send_unicast': send_unicast})

    def ip6_sw_interface_ra_prefix(self,
                                   sw_if_index,
                                   address,
                                   address_length,
                                   use_default=0,
                                   no_advertise=0,
                                   off_link=0,
                                   no_autoconfig=0,
                                   no_onlink=0,
                                   is_no=0,
                                   val_lifetime=0xffffffff,
                                   pref_lifetime=0xffffffff):
        return self.api(self.papi.sw_interface_ip6nd_ra_prefix,
                        {'sw_if_index': sw_if_index,
                         'prefix': {
                             'address': address,
                             'address_length': address_length,
                         },
                         'use_default': use_default,
                         'no_advertise': no_advertise,
                         'off_link': off_link,
                         'no_autoconfig': no_autoconfig,
                         'no_onlink': no_onlink,
                         'is_no': is_no,
                         'val_lifetime': val_lifetime,
                         'pref_lifetime': pref_lifetime})

    def ip6_sw_interface_enable_disable(self, sw_if_index, enable):
        """
        Enable/Disable An interface for IPv6
        """
        return self.api(self.papi.sw_interface_ip6_enable_disable,
                        {'sw_if_index': sw_if_index,
                         'enable': enable})

    def vxlan_add_del_tunnel(
            self,
            src_addr,
            dst_addr,
            mcast_sw_if_index=0xFFFFFFFF,
            is_add=1,
            is_ipv6=0,
            encap_vrf_id=0,
            decap_next_index=0xFFFFFFFF,
            vni=0,
            instance=0xFFFFFFFF):
        """

        :param dst_addr:
        :param src_addr:
        :param is_add:  (Default value = 1)
        :param is_ipv6:  (Default value = 0)
        :param encap_vrf_id:  (Default value = 0)
        :param decap_next_index:  (Default value = 0xFFFFFFFF)
        :param mcast_sw_if_index:  (Default value = 0xFFFFFFFF)
        :param vni:  (Default value = 0)
        :param instance:  (Default value = 0xFFFFFFFF)

        """
        return self.api(self.papi.vxlan_add_del_tunnel,
                        {'is_add': is_add,
                         'is_ipv6': is_ipv6,
                         'src_address': src_addr,
                         'dst_address': dst_addr,
                         'mcast_sw_if_index': mcast_sw_if_index,
                         'encap_vrf_id': encap_vrf_id,
                         'decap_next_index': decap_next_index,
                         'vni': vni,
                         'instance': instance})

    def geneve_add_del_tunnel(
            self,
            local_addr,
            remote_addr,
            mcast_sw_if_index=0xFFFFFFFF,
            is_add=1,
            is_ipv6=0,
            encap_vrf_id=0,
            decap_next_index=0xFFFFFFFF,
            vni=0):
        """

        :param remote_addr:
        :param local_addr:
        :param is_add:  (Default value = 1)
        :param is_ipv6:  (Default value = 0)
        :param encap_vrf_id:  (Default value = 0)
        :param decap_next_index:  (Default value = 0xFFFFFFFF)
        :param mcast_sw_if_index:  (Default value = 0xFFFFFFFF)
        :param vni:  (Default value = 0)

        """
        return self.api(self.papi.geneve_add_del_tunnel,
                        {'is_add': is_add,
                         'is_ipv6': is_ipv6,
                         'local_address': local_addr,
                         'remote_address': remote_addr,
                         'mcast_sw_if_index': mcast_sw_if_index,
                         'encap_vrf_id': encap_vrf_id,
                         'decap_next_index': decap_next_index,
                         'vni': vni})

    def bridge_domain_add_del(self, bd_id, flood=1, uu_flood=1, forward=1,
                              learn=1, arp_term=0, is_add=1):
        """Create/delete bridge domain.

        :param int bd_id: Bridge domain index.
        :param int flood: Enable/disable bcast/mcast flooding in the BD.
            (Default value = 1)
        :param int uu_flood: Enable/disable unknown unicast flood in the BD.
            (Default value = 1)
        :param int forward: Enable/disable forwarding on all interfaces in
            the BD. (Default value = 1)
        :param int learn: Enable/disable learning on all interfaces in the BD.
            (Default value = 1)
        :param int arp_term: Enable/disable arp termination in the BD.
            (Default value = 1)
        :param int is_add: Add or delete flag. (Default value = 1)
        """
        return self.api(self.papi.bridge_domain_add_del,
                        {'bd_id': bd_id,
                         'flood': flood,
                         'uu_flood': uu_flood,
                         'forward': forward,
                         'learn': learn,
                         'arp_term': arp_term,
                         'is_add': is_add})

    def bd_ip_mac_add_del(self, bd_id, mac, ip, is_ipv6=0, is_add=1):
        return self.api(self.papi.bd_ip_mac_add_del,
                        {'bd_id': bd_id,
                         'is_add': is_add,
                         'ip': ip,
                         'mac': mac})

    def bd_ip_mac_dump(self, bd_id):
        return self.api(self.papi.bd_ip_mac_dump,
                        {'bd_id': bd_id})

    def want_ip4_arp_events(self, enable_disable=1, ip="0.0.0.0"):
        return self.api(self.papi.want_ip4_arp_events,
                        {'enable_disable': enable_disable,
                         'ip': ip,
                         'pid': os.getpid(), })

    def want_ip6_nd_events(self, enable_disable=1, ip="::"):
        return self.api(self.papi.want_ip6_nd_events,
                        {'enable_disable': enable_disable,
                         'ip': ip,
                         'pid': os.getpid(), })

    def want_ip6_ra_events(self, enable_disable=1):
        return self.api(self.papi.want_ip6_ra_events,
                        {'enable_disable': enable_disable,
                         'pid': os.getpid(), })

    def ip6nd_send_router_solicitation(self, sw_if_index, irt=1, mrt=120,
                                       mrc=0, mrd=0):
        return self.api(self.papi.ip6nd_send_router_solicitation,
                        {'irt': irt,
                         'mrt': mrt,
                         'mrc': mrc,
                         'mrd': mrd,
                         'sw_if_index': sw_if_index})

    def ip6_nd_address_autoconfig(self, sw_if_index, enable,
                                  install_default_routes):
        return self.api(self.papi.ip6_nd_address_autoconfig,
                        {'sw_if_index': sw_if_index,
                         'enable': enable,
                         'install_default_routes': install_default_routes})

    def want_interface_events(self, enable_disable=1):
        return self.api(self.papi.want_interface_events,
                        {'enable_disable': enable_disable,
                         'pid': os.getpid(), })

    def want_macs_learn_events(self, enable_disable=1, scan_delay=0,
                               max_macs_in_event=0, learn_limit=0):
        return self.api(self.papi.want_l2_macs_events,
                        {'enable_disable': enable_disable,
                         'scan_delay': scan_delay,
                         'max_macs_in_event': max_macs_in_event,
                         'learn_limit': learn_limit,
                         'pid': os.getpid(), })

    def want_dhcp6_reply_events(self, enable_disable=1):
        return self.api(self.papi.want_dhcp6_reply_events,
                        {'enable_disable': enable_disable,
                         'pid': os.getpid()})

    def want_dhcp6_pd_reply_events(self, enable_disable=1):
        return self.api(self.papi.want_dhcp6_pd_reply_events,
                        {'enable_disable': enable_disable,
                         'pid': os.getpid()})

    def dhcp6_clients_enable_disable(self, enable=1):
        return self.api(self.papi.dhcp6_clients_enable_disable,
                        {'enable': enable})

    def dhcp6_send_client_message(self, msg_type, sw_if_index, T1, T2,
                                  addresses, server_index=0xFFFFFFFF,
                                  irt=0, mrt=0, mrc=1, mrd=0, stop=0,
                                  ):
        return self.api(self.papi.dhcp6_send_client_message,
                        {'sw_if_index': sw_if_index,
                         'server_index': server_index,
                         'irt': irt,
                         'mrt': mrt,
                         'mrc': mrc,
                         'mrd': mrd,
                         'stop': stop,
                         'msg_type': msg_type,
                         'T1': T1,
                         'T2': T2,
                         'n_addresses': len(addresses),
                         'addresses': addresses})

    def dhcp6_pd_send_client_message(self, msg_type, sw_if_index, T1, T2,
                                     prefixes, server_index=0xFFFFFFFF,
                                     irt=0, mrt=0, mrc=1, mrd=0, stop=0,
                                     ):
        return self.api(self.papi.dhcp6_pd_send_client_message,
                        {'sw_if_index': sw_if_index,
                         'server_index': server_index,
                         'irt': irt,
                         'mrt': mrt,
                         'mrc': mrc,
                         'mrd': mrd,
                         'stop': stop,
                         'msg_type': msg_type,
                         'T1': T1,
                         'T2': T2,
                         'n_prefixes': len(prefixes),
                         'prefixes': prefixes})

    def dhcp6_client_enable_disable(self, sw_if_index, prefix_group='',
                                    enable=1):
        return self.api(self.papi.dhcp6_client_enable_disable,
                        {'sw_if_index': sw_if_index,
                         'enable': enable})

    def dhcp6_pd_client_enable_disable(self, sw_if_index, prefix_group='',
                                       enable=1):
        return self.api(self.papi.dhcp6_pd_client_enable_disable,
                        {'sw_if_index': sw_if_index,
                         'prefix_group': prefix_group,
                         'enable': enable})

    def ip6_add_del_address_using_prefix(self, sw_if_index, address,
                                         prefix_length, prefix_group,
                                         is_add=1):
        return self.api(self.papi.ip6_add_del_address_using_prefix,
                        {'sw_if_index': sw_if_index,
                         'prefix_group': prefix_group,
                         'address': address,
                         'prefix_length': prefix_length,
                         'is_add': is_add})

    def l2fib_add_del(self, mac, bd_id, sw_if_index, is_add=1, static_mac=0,
                      filter_mac=0, bvi_mac=0):
        """Create/delete L2 FIB entry.

        :param str mac: MAC address to create FIB entry for.
        :param int bd_id: Bridge domain index.
        :param int sw_if_index: Software interface index of the interface.
        :param int is_add: Add or delete flag. (Default value = 1)
        :param int static_mac: Set to 1 to create static MAC entry.
            (Default value = 0)
        :param int filter_mac: Set to 1 to drop packet that's source or
            destination MAC address contains defined MAC address.
            (Default value = 0)
        :param int bvi_mac: Set to 1 to create entry that points to BVI
            interface. (Default value = 0)
        """
        return self.api(self.papi.l2fib_add_del,
                        {'mac': mac,
                         'bd_id': bd_id,
                         'sw_if_index': sw_if_index,
                         'is_add': is_add,
                         'static_mac': static_mac,
                         'filter_mac': filter_mac,
                         'bvi_mac': bvi_mac})

    def l2fib_flush_int(self, sw_if_index):
        """Flush L2 FIB entries for sw_if_index.

        :param int sw_if_index: Software interface index of the interface.
        """
        return self.api(self.papi.l2fib_flush_int,
                        {'sw_if_index': sw_if_index})

    def l2fib_flush_bd(self, bd_id):
        """Flush L2 FIB entries for bd_id.

        :param int sw_if_index: Bridge Domain id.
        """
        return self.api(self.papi.l2fib_flush_bd,
                        {'bd_id': bd_id})

    def l2fib_flush_all(self):
        """Flush all L2 FIB.
        """
        return self.api(self.papi.l2fib_flush_all, {})

    def l2_fib_table_dump(self, bd_id):
        """ Dump the L2 FIB """
        return self.api(self.papi.l2_fib_table_dump,
                        {'bd_id': bd_id})

    def sw_interface_set_l2_bridge(self, sw_if_index, bd_id,
                                   shg=0, port_type=L2_PORT_TYPE.NORMAL,
                                   enable=1):
        """Add/remove interface to/from bridge domain.

        :param int sw_if_index: Software interface index of the interface.
        :param int bd_id: Bridge domain index.
        :param int shg: Split-horizon group index. (Default value = 0)
        :param int bvi: Set interface as a bridge group virtual interface.
            (Default value = 0)
        :param int enable: Add or remove interface. (Default value = 1)
        """
        return self.api(self.papi.sw_interface_set_l2_bridge,
                        {'rx_sw_if_index': sw_if_index,
                         'bd_id': bd_id,
                         'shg': shg,
                         'port_type': port_type,
                         'enable': enable})

    def bridge_flags(self, bd_id, is_set, feature_bitmap):
        """Enable/disable required feature of the bridge domain with defined
        ID.

        :param int bd_id: Bridge domain ID.
        :param int is_set: Set to 1 to enable, set to 0 to disable the feature.
        :param int flags: Bitmap value of the feature to be set:
            - learn (1 << 0),
            - forward (1 << 1),
            - flood (1 << 2),
            - uu-flood (1 << 3) or
            - arp-term (1 << 4).
        """
        return self.api(self.papi.bridge_flags,
                        {'bd_id': bd_id,
                         'is_set': is_set,
                         'flags': feature_bitmap})

    def bridge_domain_dump(self, bd_id=0):
        """

        :param int bd_id: Bridge domain ID. (Default value = 0 => dump of all
            existing bridge domains returned)
        :return: Dictionary of bridge domain(s) data.
        """
        return self.api(self.papi.bridge_domain_dump,
                        {'bd_id': bd_id})

    def sw_interface_set_l2_xconnect(self, rx_sw_if_index, tx_sw_if_index,
                                     enable):
        """Create or delete unidirectional cross-connect from Tx interface to
        Rx interface.

        :param int rx_sw_if_index: Software interface index of Rx interface.
        :param int tx_sw_if_index: Software interface index of Tx interface.
        :param int enable: Create cross-connect if equal to 1, delete
            cross-connect if equal to 0.

        """
        return self.api(self.papi.sw_interface_set_l2_xconnect,
                        {'rx_sw_if_index': rx_sw_if_index,
                         'tx_sw_if_index': tx_sw_if_index,
                         'enable': enable})

    def sw_interface_set_l2_tag_rewrite(
            self,
            sw_if_index,
            vtr_oper,
            push=0,
            tag1=0,
            tag2=0):
        """L2 interface vlan tag rewrite configure request
        :param client_index - opaque cookie to identify the sender
        :param context - sender context, to match reply w/ request
        :param sw_if_index - interface the operation is applied to
        :param vtr_op - Choose from l2_vtr_op_t enum values
        :param push_dot1q - first pushed flag dot1q id set, else dot1ad
        :param tag1 - Needed for any push or translate vtr op
        :param tag2 - Needed for any push 2 or translate x-2 vtr ops

        """
        return self.api(self.papi.l2_interface_vlan_tag_rewrite,
                        {'sw_if_index': sw_if_index,
                         'vtr_op': vtr_oper,
                         'push_dot1q': push,
                         'tag1': tag1,
                         'tag2': tag2})

    def sw_interface_set_l2_emulation(
            self,
            sw_if_index,
            enable=1):
        """L2 Emulation
        :param sw_if_index - interface the operation is applied to

        """
        return self.api(self.papi.l2_emulation,
                        {'sw_if_index': sw_if_index,
                         'enable': enable})

    def sw_interface_set_ip_directed_broadcast(
            self,
            sw_if_index,
            enable=1):
        """IP Directed broadcast
        :param sw_if_index - interface the operation is applied to

        """
        return self.api(self.papi.sw_interface_set_ip_directed_broadcast,
                        {'sw_if_index': sw_if_index,
                         'enable': enable})

    def sw_interface_set_flags(self, sw_if_index, admin_up_down):
        """

        :param admin_up_down:
        :param sw_if_index:

        """
        return self.api(self.papi.sw_interface_set_flags,
                        {'sw_if_index': sw_if_index,
                         'admin_up_down': admin_up_down})

    def sw_interface_set_mtu(self, sw_if_index, mtu=[0, 0, 0, 0]):
        """
        :param sw_if_index:
        :param mtu:

        """
        return self.api(self.papi.sw_interface_set_mtu,
                        {'sw_if_index': sw_if_index,
                         'mtu': mtu})

    def sw_interface_set_promiscuous(self, sw_if_index, enable):
        """
        :param sw_if_index:
        :param enable:

        """
        return self.api(self.papi.sw_interface_set_promiscuous,
                        {'sw_if_index': sw_if_index,
                         'enable': enable})

    def sw_interface_set_mac_address(self, sw_if_index, mac):
        return self.api(self.papi.sw_interface_set_mac_address,
                        {'sw_if_index': sw_if_index,
                         'mac_address': mac})

    def create_subif(self, sw_if_index, sub_id, outer_vlan, inner_vlan,
                     no_tags=0, one_tag=0, two_tags=0, dot1ad=0, exact_match=0,
                     default_sub=0, outer_vlan_id_any=0, inner_vlan_id_any=0):
        """Create subinterface
        from vpe.api: set dot1ad = 0 for dot1q, set dot1ad = 1 for dot1ad

        :param sub_id: param inner_vlan:
        :param sw_if_index:
        :param outer_vlan:
        :param inner_vlan:
        :param no_tags:  (Default value = 0)
        :param one_tag:  (Default value = 0)
        :param two_tags:  (Default value = 0)
        :param dot1ad:  (Default value = 0)
        :param exact_match:  (Default value = 0)
        :param default_sub:  (Default value = 0)
        :param outer_vlan_id_any:  (Default value = 0)
        :param inner_vlan_id_any:  (Default value = 0)

        """
        return self.api(
            self.papi.create_subif,
            {'sw_if_index': sw_if_index,
             'sub_id': sub_id,
             'no_tags': no_tags,
             'one_tag': one_tag,
             'two_tags': two_tags,
             'dot1ad': dot1ad,
             'exact_match': exact_match,
             'default_sub': default_sub,
             'outer_vlan_id_any': outer_vlan_id_any,
             'inner_vlan_id_any': inner_vlan_id_any,
             'outer_vlan_id': outer_vlan,
             'inner_vlan_id': inner_vlan})

    def create_p2pethernet_subif(self, sw_if_index, remote_mac, subif_id):
        """Create p2p ethernet subinterface

        :param sw_if_index: main (parent) interface
        :param remote_mac: client (remote) mac address

        """
        return self.api(
            self.papi.p2p_ethernet_add,
            {'parent_if_index': sw_if_index,
             'remote_mac': remote_mac,
             'subif_id': subif_id})

    def delete_subif(self, sw_if_index):
        """Delete subinterface

        :param sw_if_index:
        """
        return self.api(self.papi.delete_subif,
                        {'sw_if_index': sw_if_index})

    def delete_p2pethernet_subif(self, sw_if_index, remote_mac):
        """Delete p2p ethernet subinterface

        :param sw_if_index: main (parent) interface
        :param remote_mac: client (remote) mac address

        """
        return self.api(
            self.papi.p2p_ethernet_del,
            {'parent_if_index': sw_if_index,
             'remote_mac': remote_mac})

    def create_vlan_subif(self, sw_if_index, vlan):
        """

        :param vlan:
        :param sw_if_index:

        """
        return self.api(self.papi.create_vlan_subif,
                        {'sw_if_index': sw_if_index,
                         'vlan_id': vlan})

    def create_loopback(self, mac=''):
        """

        :param mac: (Optional)
        """
        return self.api(self.papi.create_loopback,
                        {'mac_address': mac})

    def delete_loopback(self, sw_if_index):
        return self.api(self.papi.delete_loopback,
                        {'sw_if_index': sw_if_index, })

    def ip_table_add_del(self,
                         table_id,
                         is_add=1,
                         is_ipv6=0):
        """

        :param table_id
        :param is_add:  (Default value = 1)
        :param is_ipv6:  (Default value = 0)

        """

        return self.api(
            self.papi.ip_table_add_del,
            {'table_id': table_id,
             'is_add': is_add,
             'is_ipv6': is_ipv6})

    def ip_add_del_route(
            self,
            dst_address,
            dst_address_length,
            next_hop_address,
            next_hop_sw_if_index=0xFFFFFFFF,
            table_id=0,
            next_hop_table_id=0,
            next_hop_weight=1,
            next_hop_n_out_labels=0,
            next_hop_out_label_stack=[],
            next_hop_via_label=MPLS_LABEL_INVALID,
            next_hop_id=0xFFFFFFFF,
            is_resolve_host=0,
            is_resolve_attached=0,
            classify_table_index=0xFFFFFFFF,
            is_add=1,
            is_drop=0,
            is_unreach=0,
            is_prohibit=0,
            is_ipv6=0,
            is_local=0,
            is_classify=0,
            is_multipath=0,
            is_dvr=0,
            is_udp_encap=0,
            is_source_lookup=0):
        """

        :param dst_address_length:
        :param next_hop_sw_if_index:  (Default value = 0xFFFFFFFF)
        :param dst_address:
        :param next_hop_address:
        :param next_hop_sw_if_index:  (Default value = 0xFFFFFFFF)
        :param vrf_id:  (Default value = 0)
        :param lookup_in_vrf:  (Default value = 0)
        :param classify_table_index:  (Default value = 0xFFFFFFFF)
        :param is_add:  (Default value = 1)
        :param is_drop:  (Default value = 0)
        :param is_ipv6:  (Default value = 0)
        :param is_local:  (Default value = 0)
        :param is_classify:  (Default value = 0)
        :param is_multipath:  (Default value = 0)
        :param is_resolve_host:  (Default value = 0)
        :param is_resolve_attached:  (Default value = 0)
        :param is_dvr:  (Default value = 0)
        :param is_source_lookup:  (Default value = 0)
        :param next_hop_weight:  (Default value = 1)

        """

        return self.api(
            self.papi.ip_add_del_route,
            {'next_hop_sw_if_index': next_hop_sw_if_index,
             'table_id': table_id,
             'classify_table_index': classify_table_index,
             'next_hop_table_id': next_hop_table_id,
             'is_add': is_add,
             'is_drop': is_drop,
             'is_unreach': is_unreach,
             'is_prohibit': is_prohibit,
             'is_ipv6': is_ipv6,
             'is_local': is_local,
             'is_classify': is_classify,
             'is_multipath': is_multipath,
             'is_resolve_host': is_resolve_host,
             'is_resolve_attached': is_resolve_attached,
             'is_dvr': is_dvr,
             'is_source_lookup': is_source_lookup,
             'is_udp_encap': is_udp_encap,
             'next_hop_weight': next_hop_weight,
             'dst_address_length': dst_address_length,
             'dst_address': dst_address,
             'next_hop_id': next_hop_id,
             'next_hop_address': next_hop_address,
             'next_hop_n_out_labels': next_hop_n_out_labels,
             'next_hop_via_label': next_hop_via_label,
             'next_hop_out_label_stack': next_hop_out_label_stack})

    def ip_fib_dump(self):
        return self.api(self.papi.ip_fib_dump, {})

    def ip6_fib_dump(self):
        return self.api(self.papi.ip6_fib_dump, {})

    def ip_neighbor_add_del(self,
                            sw_if_index,
                            mac_address,
                            ip_address,
                            is_add=1,
                            flags=0):
        """ Add neighbor MAC to IPv4 or IPv6 address.

        :param sw_if_index:
        :param mac_address:
        :param dst_address:
        :param is_add:  (Default value = 1)
        :param flags:  (Default value = 0/NONE)
        """
        return self.api(
            self.papi.ip_neighbor_add_del,
            {
                'is_add': is_add,
                'neighbor': {
                    'sw_if_index': sw_if_index,
                    'flags': flags,
                    'mac_address': mac_address,
                    'ip_address': ip_address
                }
            }
        )

    def ip_neighbor_dump(self,
                         sw_if_index,
                         is_ipv6=0):
        """ Return IP neighbor dump.

        :param sw_if_index:
        :param int is_ipv6: 1 for IPv6 neighbor, 0 for IPv4. (Default = 0)
        """

        return self.api(
            self.papi.ip_neighbor_dump,
            {'is_ipv6': is_ipv6,
             'sw_if_index': sw_if_index
             }
        )

    def proxy_arp_add_del(self,
                          low,
                          hi,
                          table_id=0,
                          is_add=1):
        """ Config Proxy Arp Range.

        :param low_address: Start address in the rnage to Proxy for
        :param hi_address: End address in the rnage to Proxy for
        :param vrf_id: The VRF/table in which to proxy
        """

        return self.api(
            self.papi.proxy_arp_add_del,
            {'proxy':
             {
                 'table_id': table_id,
                 'low': low,
                 'hi': hi,
             },
             'is_add': is_add})

    def proxy_arp_intfc_enable_disable(self,
                                       sw_if_index,
                                       is_enable=1):
        """ Enable/Disable an interface for proxy ARP requests

        :param sw_if_index: Interface
        :param enable_disable: Enable/Disable
        """

        return self.api(
            self.papi.proxy_arp_intfc_enable_disable,
            {'sw_if_index': sw_if_index,
             'enable_disable': is_enable
             }
        )

    def reset_vrf(self,
                  vrf_id,
                  is_ipv6=0,
                  ):
        """ Reset VRF (remove all routes etc.) request.

        :param int vrf_id: ID of the FIB table / VRF to reset.
        :param int is_ipv6: 1 for IPv6 neighbor, 0 for IPv4. (Default = 0)
        """

        return self.api(
            self.papi.reset_vrf,
            {'vrf_id': vrf_id,
             'is_ipv6': is_ipv6,
             }
        )

    def reset_fib(self,
                  vrf_id,
                  is_ipv6=0,
                  ):
        """ Reset VRF (remove all routes etc.) request.

        :param int vrf_id: ID of the FIB table / VRF to reset.
        :param int is_ipv6: 1 for IPv6 neighbor, 0 for IPv4. (Default = 0)
        """

        return self.api(
            self.papi.reset_fib,
            {'vrf_id': vrf_id,
             'is_ipv6': is_ipv6,
             }
        )

    def ip_dump(self,
                is_ipv6=0,
                ):
        """ Return IP dump.

        :param int is_ipv6: 1 for IPv6 neighbor, 0 for IPv4. (Default = 0)
        """

        return self.api(
            self.papi.ip_dump,
            {'is_ipv6': is_ipv6,
             }
        )

    def sw_interface_span_enable_disable(
            self, sw_if_index_from, sw_if_index_to, state=1, is_l2=0):
        """

        :param sw_if_index_from:
        :param sw_if_index_to:
        :param state:
        :param is_l2:
        """
        return self.api(self.papi.sw_interface_span_enable_disable,
                        {'sw_if_index_from': sw_if_index_from,
                         'sw_if_index_to': sw_if_index_to,
                         'state': state,
                         'is_l2': is_l2,
                         })

    def gre_tunnel_add_del(self,
                           src_address,
                           dst_address,
                           outer_fib_id=0,
                           tunnel_type=0,
                           instance=0xFFFFFFFF,
                           session_id=0,
                           is_add=1,
                           is_ip6=0):
        """ Add a GRE tunnel

        :param src_address:
        :param dst_address:
        :param outer_fib_id:  (Default value = 0)
        :param tunnel_type:  (Default value = 0)
        :param instance:  (Default value = 0xFFFFFFFF)
        :param session_id: (Defalt value = 0)
        :param is_add:  (Default value = 1)
        :param is_ipv6:  (Default value = 0)
        """

        return self.api(
            self.papi.gre_add_del_tunnel,
            {'is_add': is_add,
             'is_ipv6': is_ip6,
             'tunnel_type': tunnel_type,
             'instance': instance,
             'src_address': src_address,
             'dst_address': dst_address,
             'outer_fib_id': outer_fib_id,
             'session_id': session_id}
        )

    def udp_encap_add(self,
                      src_ip,
                      dst_ip,
                      src_port,
                      dst_port,
                      table_id=0):
        """ Add a GRE tunnel
        :param src_ip:
        :param dst_ip:
        :param src_port:
        :param dst_port:
        :param outer_fib_id:  (Default value = 0)
        """

        return self.api(
            self.papi.udp_encap_add,
            {
                'udp_encap': {
                    'src_ip': src_ip,
                    'dst_ip': dst_ip,
                    'src_port': src_port,
                    'dst_port': dst_port,
                    'table_id': table_id
                }
            })

    def udp_encap_del(self, id):
        return self.api(self.papi.udp_encap_del, {'id': id})

    def udp_encap_dump(self):
        return self.api(self.papi.udp_encap_dump, {})

    def want_udp_encap_stats(self, enable=1):
        return self.api(self.papi.want_udp_encap_stats,
                        {'enable': enable,
                         'pid': os.getpid()})

    def mpls_fib_dump(self):
        return self.api(self.papi.mpls_fib_dump, {})

    def mpls_table_add_del(
            self,
            table_id,
            is_add=1):
        """

        :param table_id
        :param is_add:  (Default value = 1)

        """

        return self.api(
            self.papi.mpls_table_add_del,
            {'mt_table_id': table_id,
             'mt_is_add': is_add})

    def mpls_route_add_del(
            self,
            label,
            eos,
            next_hop_proto,
            next_hop_address,
            next_hop_sw_if_index=0xFFFFFFFF,
            table_id=0,
            next_hop_table_id=0,
            next_hop_weight=1,
            next_hop_n_out_labels=0,
            next_hop_out_label_stack=[],
            next_hop_via_label=MPLS_LABEL_INVALID,
            is_resolve_host=0,
            is_resolve_attached=0,
            is_interface_rx=0,
            is_rpf_id=0,
            is_multicast=0,
            is_add=1,
            is_drop=0,
            is_multipath=0,
            classify_table_index=0xFFFFFFFF,
            is_classify=0):
        """

        :param dst_address_length:
        :param next_hop_sw_if_index:  (Default value = 0xFFFFFFFF)
        :param dst_address:
        :param next_hop_address:
        :param next_hop_sw_if_index:  (Default value = 0xFFFFFFFF)
        :param vrf_id:  (Default value = 0)
        :param lookup_in_vrf:  (Default value = 0)
        :param classify_table_index:  (Default value = 0xFFFFFFFF)
        :param is_add:  (Default value = 1)
        :param is_drop:  (Default value = 0)
        :param is_ipv6:  (Default value = 0)
        :param is_local:  (Default value = 0)
        :param is_classify:  (Default value = 0)
        :param is_multipath:  (Default value = 0)
        :param is_multicast:  (Default value = 0)
        :param is_resolve_host:  (Default value = 0)
        :param is_resolve_attached:  (Default value = 0)
        :param next_hop_weight:  (Default value = 1)

        """
        return self.api(
            self.papi.mpls_route_add_del,
            {'mr_label': label,
             'mr_eos': eos,
             'mr_table_id': table_id,
             'mr_classify_table_index': classify_table_index,
             'mr_is_add': is_add,
             'mr_is_classify': is_classify,
             'mr_is_multipath': is_multipath,
             'mr_is_multicast': is_multicast,
             'mr_is_resolve_host': is_resolve_host,
             'mr_is_resolve_attached': is_resolve_attached,
             'mr_is_interface_rx': is_interface_rx,
             'mr_is_rpf_id': is_rpf_id,
             'mr_next_hop_proto': next_hop_proto,
             'mr_next_hop_weight': next_hop_weight,
             'mr_next_hop': next_hop_address,
             'mr_next_hop_n_out_labels': next_hop_n_out_labels,
             'mr_next_hop_sw_if_index': next_hop_sw_if_index,
             'mr_next_hop_table_id': next_hop_table_id,
             'mr_next_hop_via_label': next_hop_via_label,
             'mr_next_hop_out_label_stack': next_hop_out_label_stack})

    def mpls_ip_bind_unbind(
            self,
            label,
            dst_address,
            dst_address_length,
            table_id=0,
            ip_table_id=0,
            is_ip4=1,
            is_bind=1):
        """
        """
        return self.api(
            self.papi.mpls_ip_bind_unbind,
            {'mb_mpls_table_id': table_id,
             'mb_label': label,
             'mb_ip_table_id': ip_table_id,
             'mb_is_bind': is_bind,
             'mb_is_ip4': is_ip4,
             'mb_address_length': dst_address_length,
             'mb_address': dst_address})

    def mpls_tunnel_add_del(
            self,
            tun_sw_if_index,
            next_hop_proto_is_ip4,
            next_hop_address,
            next_hop_sw_if_index=0xFFFFFFFF,
            next_hop_table_id=0,
            next_hop_weight=1,
            next_hop_n_out_labels=0,
            next_hop_out_label_stack=[],
            next_hop_via_label=MPLS_LABEL_INVALID,
            is_add=1,
            l2_only=0,
            is_multicast=0):
        """

        :param dst_address_length:
        :param next_hop_sw_if_index:  (Default value = 0xFFFFFFFF)
        :param dst_address:
        :param next_hop_address:
        :param next_hop_sw_if_index:  (Default value = 0xFFFFFFFF)
        :param vrf_id:  (Default value = 0)
        :param lookup_in_vrf:  (Default value = 0)
        :param classify_table_index:  (Default value = 0xFFFFFFFF)
        :param is_add:  (Default value = 1)
        :param is_drop:  (Default value = 0)
        :param is_ipv6:  (Default value = 0)
        :param is_local:  (Default value = 0)
        :param is_classify:  (Default value = 0)
        :param is_multipath:  (Default value = 0)
        :param is_resolve_host:  (Default value = 0)
        :param is_resolve_attached:  (Default value = 0)
        :param next_hop_weight:  (Default value = 1)
        :param is_multicast:  (Default value = 0)

        """
        return self.api(
            self.papi.mpls_tunnel_add_del,
            {'mt_sw_if_index': tun_sw_if_index,
             'mt_is_add': is_add,
             'mt_l2_only': l2_only,
             'mt_is_multicast': is_multicast,
             'mt_next_hop_proto_is_ip4': next_hop_proto_is_ip4,
             'mt_next_hop_weight': next_hop_weight,
             'mt_next_hop': next_hop_address,
             'mt_next_hop_n_out_labels': next_hop_n_out_labels,
             'mt_next_hop_sw_if_index': next_hop_sw_if_index,
             'mt_next_hop_table_id': next_hop_table_id,
             'mt_next_hop_via_label': next_hop_via_label,
             'mt_next_hop_out_label_stack': next_hop_out_label_stack})

    def mpls_tunnel_dump(self, sw_if_index=0xffffffff):
        return self.api(self.papi.mpls_tunnel_dump,
                        {'sw_if_index': sw_if_index})

    def nat44_interface_add_del_feature(
            self,
            sw_if_index,
            is_inside=1,
            is_add=1):
        """Enable/disable NAT44 feature on the interface

        :param sw_if_index: Software index of the interface
        :param is_inside: 1 if inside, 0 if outside (Default value = 1)
        :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat44_interface_add_del_feature,
            {'is_add': is_add,
             'is_inside': is_inside,
             'sw_if_index': sw_if_index})

    def nat44_interface_add_del_output_feature(
            self,
            sw_if_index,
            is_inside=1,
            is_add=1):
        """Enable/disable NAT44 output feature on the interface

        :param sw_if_index: Software index of the interface
        :param is_inside: 1 if inside, 0 if outside (Default value = 1)
        :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat44_interface_add_del_output_feature,
            {'is_add': is_add,
             'is_inside': is_inside,
             'sw_if_index': sw_if_index})

    def nat44_add_del_static_mapping(
            self,
            local_ip,
            external_ip=0,
            external_sw_if_index=0xFFFFFFFF,
            local_port=0,
            external_port=0,
            addr_only=1,
            vrf_id=0,
            protocol=0,
            twice_nat=0,
            self_twice_nat=0,
            out2in_only=0,
            tag="",
            is_add=1):
        """Add/delete NAT44 static mapping

        :param local_ip: Local IP address
        :param external_ip: External IP address
        :param external_sw_if_index: External interface instead of IP address
        :param local_port: Local port number (Default value = 0)
        :param external_port: External port number (Default value = 0)
        :param addr_only: 1 if address only mapping, 0 if address and port
        :param vrf_id: VRF ID
        :param protocol: IP protocol (Default value = 0)
        :param twice_nat: 1 if translate external host address and port
        :param self_twice_nat: 1 if translate external host address and port
                               whenever external host address equals
                               local address of internal host
        :param out2in_only: if 1 rule is matching only out2in direction
        :param tag: Opaque string tag
        :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat44_add_del_static_mapping,
            {'is_add': is_add,
             'addr_only': addr_only,
             'local_ip_address': local_ip,
             'external_ip_address': external_ip,
             'local_port': local_port,
             'external_port': external_port,
             'external_sw_if_index': external_sw_if_index,
             'vrf_id': vrf_id,
             'protocol': protocol,
             'twice_nat': twice_nat,
             'self_twice_nat': self_twice_nat,
             'out2in_only': out2in_only,
             'tag': tag})

    def nat44_add_del_identity_mapping(
            self,
            ip='0',
            sw_if_index=0xFFFFFFFF,
            port=0,
            addr_only=1,
            vrf_id=0,
            protocol=0,
            tag='',
            is_add=1):
        """Add/delete NAT44 identity mapping

        :param ip: IP address (Default value = 0)
        :param sw_if_index: Interface instead of IP address
        :param port: Port number (Default value = 0)
        :param addr_only: 1 if address only mapping, 0 if address and port
        :param vrf_id: VRF ID
        :param protocol: IP protocol (Default value = 0)
        :param tag: Opaque string tag
        :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat44_add_del_identity_mapping,
            {'is_add': is_add,
             'addr_only': addr_only,
             'ip_address': ip,
             'port': port,
             'sw_if_index': sw_if_index,
             'vrf_id': vrf_id,
             'tag': tag,
             'protocol': protocol})

    def nat44_add_del_address_range(
            self,
            first_ip_address,
            last_ip_address,
            is_add=1,
            vrf_id=0xFFFFFFFF,
            twice_nat=0):
        """Add/del NAT44 address range

        :param first_ip_address: First IP address
        :param last_ip_address: Last IP address
        :param vrf_id: VRF id for the address range
        :param twice_nat: twice NAT address for extenal hosts
        :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat44_add_del_address_range,
            {'first_ip_address': first_ip_address,
             'last_ip_address': last_ip_address,
             'vrf_id': vrf_id,
             'twice_nat': twice_nat,
             'is_add': is_add})

    def nat44_address_dump(self):
        """Dump NAT44 addresses
        :return: Dictionary of NAT44 addresses
        """
        return self.api(self.papi.nat44_address_dump, {})

    def nat44_interface_dump(self):
        """Dump interfaces with NAT44 feature
        :return: Dictionary of interfaces with NAT44 feature
        """
        return self.api(self.papi.nat44_interface_dump, {})

    def nat44_interface_output_feature_dump(self):
        """Dump interfaces with NAT44 output feature
        :return: Dictionary of interfaces with NAT44 output feature
        """
        return self.api(self.papi.nat44_interface_output_feature_dump, {})

    def nat44_static_mapping_dump(self):
        """Dump NAT44 static mappings
        :return: Dictionary of NAT44 static mappings
        """
        return self.api(self.papi.nat44_static_mapping_dump, {})

    def nat44_identity_mapping_dump(self):
        """Dump NAT44 identity mappings
        :return: Dictionary of NAT44 identity mappings
        """
        return self.api(self.papi.nat44_identity_mapping_dump, {})

    def nat_show_config(self):
        """Show NAT plugin config
        :return: NAT plugin config parameters
        """
        return self.api(self.papi.nat_show_config, {})

    def nat44_add_interface_addr(
            self,
            sw_if_index,
            twice_nat=0,
            is_add=1):
        """Add/del NAT44 address from interface

        :param sw_if_index: Software index of the interface
        :param twice_nat: twice NAT address for extenal hosts
        :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat44_add_del_interface_addr,
            {'is_add': is_add,
             'sw_if_index': sw_if_index,
             'twice_nat': twice_nat})

    def nat44_interface_addr_dump(self):
        """Dump NAT44 addresses interfaces
        :return: Dictionary of NAT44 addresses interfaces
        """
        return self.api(self.papi.nat44_interface_addr_dump, {})

    def nat_ipfix(
            self,
            domain_id=1,
            src_port=4739,
            enable=1):
        """Enable/disable NAT IPFIX logging

        :param domain_id: Observation domain ID (Default value = 1)
        :param src_port: Source port number (Default value = 4739)
        :param enable: 1 if enable, 0 if disable (Default value = 1)
        """
        return self.api(
            self.papi.nat_ipfix_enable_disable,
            {'domain_id': domain_id,
             'src_port': src_port,
             'enable': enable})

    def nat44_user_session_dump(
            self,
            ip_address,
            vrf_id):
        """Dump NAT44 user's sessions

        :param ip_address: ip adress of the user to be dumped
        :param cpu_index: cpu_index on which the user is
        :param vrf_id: VRF ID
        :return: Dictionary of S-NAT sessions
        """
        return self.api(
            self.papi.nat44_user_session_dump,
            {'ip_address': ip_address,
             'vrf_id': vrf_id})

    def nat44_user_dump(self):
        """Dump NAT44 users

        :return: Dictionary of NAT44 users
        """
        return self.api(self.papi.nat44_user_dump, {})

    def nat44_add_del_lb_static_mapping(
            self,
            external_addr,
            external_port,
            protocol,
            twice_nat=0,
            self_twice_nat=0,
            out2in_only=0,
            tag='',
            affinity=0,
            local_num=0,
            locals=[],
            is_add=1):
        """Add/delete NAT44 load balancing static mapping

        :param twice_nat: 1 if translate external host address and port
        :param tag: Opaque string tag
        :param affinity: if 0 disabled, otherwise client IP affinity timeout
        :param is_add - 1 if add, 0 if delete
        """
        return self.api(
            self.papi.nat44_add_del_lb_static_mapping,
            {'is_add': is_add,
             'external_addr': external_addr,
             'external_port': external_port,
             'protocol': protocol,
             'twice_nat': twice_nat,
             'self_twice_nat': self_twice_nat,
             'out2in_only': out2in_only,
             'tag': tag,
             'affinity': affinity,
             'local_num': local_num,
             'locals': locals})

    def nat44_lb_static_mapping_add_del_local(
           self,
           external_addr,
           external_port,
           local_addr,
           local_port,
           protocol,
           probability,
           vrf_id=0,
           is_add=1):
        """Add/delete NAT44 load-balancing static mapping rule backend

        :param external_addr: external IPv4 address of the servic
        :param external_port: external L4 port number of the service
        :param local_addr: IPv4 address of the internal node
        :param local_port: L4 port number of the internal node
        :param protocol: IP protocol number
        :param probability: probability of the internal node
        :param vrf_id: VRF id of the internal node
        :param is_add: 1 if add, 0 if delete
        """
        return self.api(
            self.papi.nat44_lb_static_mapping_add_del_local,
            {'is_add': is_add,
             'external_addr': external_addr,
             'external_port': external_port,
             'local': {
                 'addr': local_addr,
                 'port': local_port,
                 'probability': probability,
                 'vrf_id': vrf_id},
             'protocol': protocol})

    def nat44_lb_static_mapping_dump(self):
        """Dump NAT44 load balancing static mappings

        :return: Dictionary of NAT44 load balancing static mapping
        """
        return self.api(self.papi.nat44_lb_static_mapping_dump, {})

    def nat44_del_session(
            self,
            addr,
            port,
            protocol,
            vrf_id=0,
            is_in=1,
            ext_host_address=None,
            ext_host_port=0):
        """Delete NAT44 session

        :param addr: IPv4 address
        :param por: port number
        :param protocol: IP protocol number
        :param vrf_id: VRF ID
        :param is_in: 1 if inside network addres and port pari, 0 if outside
        :param ext_host_address: external host IPv4 address
        :param ext_host_port: external host port
        """
        if ext_host_address is None:
            return self.api(
                self.papi.nat44_del_session,
                {'address': addr,
                 'port': port,
                 'protocol': protocol,
                 'vrf_id': vrf_id,
                 'is_in': is_in})
        else:
            return self.api(
                self.papi.nat44_del_session,
                {'address': addr,
                 'port': port,
                 'protocol': protocol,
                 'vrf_id': vrf_id,
                 'is_in': is_in,
                 'ext_host_valid': 1,
                 'ext_host_address': ext_host_address,
                 'ext_host_port': ext_host_port})

    def nat44_forwarding_enable_disable(
            self,
            enable):
        """Enable/disable forwarding for NAT44

        :param enable: 1 for enable, 0 for disable
        """
        return self.api(
            self.papi.nat44_forwarding_enable_disable,
            {'enable': enable})

    def nat_set_reass(
            self,
            timeout=2,
            max_reass=1024,
            max_frag=5,
            drop_frag=0,
            is_ip6=0):
        """Set NAT virtual fragmentation reassembly

        :param timeout: reassembly timeout (Default 2sec)
        :param max_reass: maximum concurrent reassemblies (Default 1024)
        :param max_frag: maximum fragmets per reassembly (Default 5)
        :param drop_frag: if 0 translate fragments, otherwise drop fragments
        :param is_ip6: 1 if IPv6, 0 if IPv4
        """
        return self.api(
            self.papi.nat_set_reass,
            {'timeout': timeout,
             'max_reass': max_reass,
             'max_frag': max_frag,
             'drop_frag': drop_frag,
             'is_ip6': is_ip6})

    def nat_get_reass(self):
        """Get NAT virtual fragmentation reassembly configuration

        :return: NAT virtual fragmentation reassembly configuration
        """
        return self.api(self.papi.nat_get_reass, {})

    def nat_reass_dump(self):
        """Dump NAT virtual fragmentation reassemblies

        :return: Dictionary of NAT virtual fragmentation reassemblies
        """
        return self.api(self.papi.nat_reass_dump, {})

    def nat_det_add_del_map(
            self,
            in_addr,
            in_plen,
            out_addr,
            out_plen,
            is_add=1):
        """Add/delete deterministic NAT mapping

        :param is_add - 1 if add, 0 if delete
        :param in_addr - inside IP address
        :param in_plen - inside IP address prefix length
        :param out_addr - outside IP address
        :param out_plen - outside IP address prefix length
        """
        return self.api(
            self.papi.nat_det_add_del_map,
            {'is_add': is_add,
             'is_nat44': 1,
             'in_addr': in_addr,
             'in_plen': in_plen,
             'out_addr': out_addr,
             'out_plen': out_plen})

    def nat_det_forward(
            self,
            in_addr):
        """Get outside address and port range from inside address

        :param in_addr - inside IP address
        """
        return self.api(
            self.papi.nat_det_forward,
            {'in_addr': in_addr,
             'is_nat44': 1})

    def nat_det_reverse(
            self,
            out_addr,
            out_port):
        """Get inside address from outside address and port

        :param out_addr - outside IP address
        :param out_port - outside port
        """
        return self.api(
            self.papi.nat_det_reverse,
            {'out_addr': out_addr,
             'out_port': out_port})

    def nat_det_map_dump(self):
        """Dump deterministic NAT mappings

        :return: Dictionary of deterministic NAT mappings
        """
        return self.api(self.papi.nat_det_map_dump, {})

    def nat_set_timeouts(
            self,
            udp=300,
            tcp_established=7440,
            tcp_transitory=240,
            icmp=60):
        """Set values of timeouts for NAT sessions (in seconds)

        :param udp - UDP timeout (Default value = 300)
        :param tcp_established - TCP established timeout (Default value = 7440)
        :param tcp_transitory - TCP transitory timeout (Default value = 240)
        :param icmp - ICMP timeout (Default value = 60)
        """
        return self.api(
            self.papi.nat_set_timeouts,
            {'udp': udp,
             'tcp_established': tcp_established,
             'tcp_transitory': tcp_transitory,
             'icmp': icmp})

    def nat_get_timeouts(self):
        """Get values of timeouts for NAT sessions

        :return: Timeouts for NAT sessions (in seconds)
        """
        return self.api(self.papi.nat_get_timeouts, {})

    def nat_set_addr_and_port_alloc_alg(
            self,
            alg=0,
            psid_offset=0,
            psid_length=0,
            psid=0,
            start_port=0,
            end_port=0):
        """Set address and port assignment algorithm

        :param alg: algorithm: 0 - default, 1 - MAP-E, 2 - port range
        :param psid_offset: number of offset bits (valid only for MAP-E alg)
        :param psid_length: length of PSID (valid only for MAP-E alg)
        :param psid: Port Set Identifier value (valid only for MAP-E alg)
        :param start_port: beginning of the port range
        :param end_port: end of the port range
        """
        return self.api(
            self.papi.nat_set_addr_and_port_alloc_alg,
            {'alg': alg,
             'psid_offset': psid_offset,
             'psid_length': psid_length,
             'psid': psid,
             'start_port': start_port,
             'end_port': end_port})

    def nat_get_addr_and_port_alloc_alg(self):
        """Get address and port assignment algorithm"""
        return self.api(self.papi.nat_get_addr_and_port_alloc_alg, {})

    def nat_set_mss_clamping(self, enable=0, mss_value=1500):
        """Set TCP MSS rewriting configuration

        :param enable: disable(0)/enable(1) MSS rewriting feature
        :param mss_value: MSS value to be used for MSS rewriting
        """
        return self.api(
            self.papi.nat_set_mss_clamping,
            {'enable': enable, 'mss_value': mss_value})

    def nat_get_mss_clamping(self):
        """Get TCP MSS rewriting configuration"""
        return self.api(self.papi.nat_get_mss_clamping, {})

    def nat_det_close_session_out(
            self,
            out_addr,
            out_port,
            ext_addr,
            ext_port):
        """Close deterministic NAT session using outside address and port

        :param out_addr - outside IP address
        :param out_port - outside port
        :param ext_addr - external host IP address
        :param ext_port - external host port
        """
        return self.api(
            self.papi.nat_det_close_session_out,
            {'out_addr': out_addr,
             'out_port': out_port,
             'ext_addr': ext_addr,
             'ext_port': ext_port})

    def nat_det_close_session_in(
            self,
            in_addr,
            in_port,
            ext_addr,
            ext_port):
        """Close deterministic NAT session using inside address and port

        :param in_addr - inside IP address
        :param in_port - inside port
        :param ext_addr - external host IP address
        :param ext_port - external host port
        """
        return self.api(
            self.papi.nat_det_close_session_in,
            {'in_addr': in_addr,
             'in_port': in_port,
             'ext_addr': ext_addr,
             'ext_port': ext_port,
             'is_nat44': 1})

    def nat_det_session_dump(
            self,
            user_addr):
        """Dump deterministic NAT sessions belonging to a user

        :param user_addr - inside IP address of the user
        :return: Dictionary of deterministic NAT sessions
        """
        return self.api(
            self.papi.nat_det_session_dump,
            {'is_nat44': 1,
             'user_addr': user_addr})

    def nat64_add_del_pool_addr_range(
            self,
            start_addr,
            end_addr,
            vrf_id=0xFFFFFFFF,
            is_add=1):
        """Add/del address range to NAT64 pool

        :param start_addr: First IP address
        :param end_addr: Last IP address
        :param vrf_id: VRF id for the address range
        :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat64_add_del_pool_addr_range,
            {'start_addr': start_addr,
             'end_addr': end_addr,
             'vrf_id': vrf_id,
             'is_add': is_add})

    def nat64_pool_addr_dump(self):
        """Dump NAT64 pool addresses
        :return: Dictionary of NAT64 pool addresses
        """
        return self.api(self.papi.nat64_pool_addr_dump, {})

    def nat64_add_del_interface(
            self,
            sw_if_index,
            is_inside=1,
            is_add=1):
        """Enable/disable NAT64 feature on the interface
           :param sw_if_index: Index of the interface
           :param is_inside: 1 if inside, 0 if outside (Default value = 1)
           :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat64_add_del_interface,
            {'sw_if_index': sw_if_index,
             'is_inside': is_inside,
             'is_add': is_add})

    def nat64_interface_dump(self):
        """Dump interfaces with NAT64 feature
        :return: Dictionary of interfaces with NAT64 feature
        """
        return self.api(self.papi.nat64_interface_dump, {})

    def nat64_add_del_static_bib(
            self,
            in_ip,
            out_ip,
            in_port,
            out_port,
            protocol,
            vrf_id=0,
            is_add=1):
        """Add/delete S-NAT static BIB entry

        :param in_ip: Inside IPv6 address
        :param out_ip: Outside IPv4 address
        :param in_port: Inside port number
        :param out_port: Outside port number
        :param protocol: IP protocol
        :param vrf_id: VRF ID (Default value = 0)
        :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat64_add_del_static_bib,
            {'i_addr': in_ip,
             'o_addr': out_ip,
             'i_port': in_port,
             'o_port': out_port,
             'vrf_id': vrf_id,
             'proto': protocol,
             'is_add': is_add})

    def nat64_bib_dump(self, protocol=255):
        """Dump NAT64 BIB

        :param protocol: IP protocol (Default value = 255, all BIBs)
        :returns: Dictionary of NAT64 BIB entries
        """
        return self.api(self.papi.nat64_bib_dump, {'proto': protocol})

    def nat64_set_timeouts(self, udp=300, icmp=60, tcp_trans=240, tcp_est=7440,
                           tcp_incoming_syn=6):
        """Set values of timeouts for NAT64 (in seconds)

        :param udpi: UDP timeout (Default value = 300)
        :param icmp: ICMP timeout (Default value = 60)
        :param tcp_trans: TCP transitory timeout (Default value = 240)
        :param tcp_est: TCP established timeout (Default value = 7440)
        :param tcp_incoming_syn: TCP incoming SYN timeout (Default value = 6)
        """
        return self.api(
            self.papi.nat64_set_timeouts,
            {'udp': udp,
             'icmp': icmp,
             'tcp_trans': tcp_trans,
             'tcp_est': tcp_est,
             'tcp_incoming_syn': tcp_incoming_syn})

    def nat64_get_timeouts(self):
        """Get values of timeouts for NAT64

        :return: Timeouts for NAT64 (in seconds)
        """
        return self.api(self.papi.nat64_get_timeouts, {})

    def nat64_st_dump(self, protocol=255):
        """Dump NAT64 session table

        :param protocol: IP protocol (Default value = 255, all STs)
        :returns: Dictionary of NAT64 sesstion table entries
        """
        return self.api(self.papi.nat64_st_dump, {'proto': protocol})

    def nat64_add_del_prefix(self, prefix, plen, vrf_id=0, is_add=1):
        """Add/del NAT64 prefix

        :param prefix: NAT64 prefix
        :param plen: NAT64 prefix length
        :param vrf_id: VRF id of tenant (Default 0)
        :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat64_add_del_prefix,
            {'prefix': prefix,
             'prefix_len': plen,
             'vrf_id': vrf_id,
             'is_add': is_add})

    def nat64_prefix_dump(self):
        """Dump NAT64 prefix

        :returns: Dictionary of NAT64 prefixes
        """
        return self.api(self.papi.nat64_prefix_dump, {})

    def nat64_add_interface_addr(
            self,
            sw_if_index,
            is_add=1):
        """Add/del NAT64 address from interface

        :param sw_if_index: Software index of the interface
        :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(self.papi.nat64_add_del_interface_addr,
                        {'is_add': is_add, 'sw_if_index': sw_if_index})

    def dslite_set_aftr_addr(self, ip6, ip4):
        """Set DS-Lite AFTR addresses

        :param ip4: IPv4 address
        :param ip6: IPv6 address
        """
        return self.api(
            self.papi.dslite_set_aftr_addr,
            {'ip4_addr': ip4,
             'ip6_addr': ip6})

    def dslite_set_b4_addr(self, ip6, ip4):
        """Set DS-Lite B4 IPv6 address

        :param ip4: IPv4 address
        :param ip6: IPv6 address
        """
        return self.api(
            self.papi.dslite_set_b4_addr,
            {'ip4_addr': ip4,
             'ip6_addr': ip6})

    def dslite_add_del_pool_addr_range(
            self,
            start_addr,
            end_addr,
            is_add=1):
        """Add/del address range to DS-Lite pool

        :param start_addr: First IP address
        :param end_addr: Last IP address
        :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.dslite_add_del_pool_addr_range,
            {'start_addr': start_addr,
             'end_addr': end_addr,
             'is_add': is_add})

    def nat66_add_del_interface(
            self,
            sw_if_index,
            is_inside=1,
            is_add=1):
        """Enable/disable NAT66 feature on the interface
           :param sw_if_index: Index of the interface
           :param is_inside: 1 if inside, 0 if outside (Default value = 1)
           :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat66_add_del_interface,
            {'sw_if_index': sw_if_index,
             'is_inside': is_inside,
             'is_add': is_add})

    def nat66_add_del_static_mapping(
            self,
            in_ip,
            out_ip,
            vrf_id=0,
            is_add=1):
        """Add/delete NAT66 static mapping

        :param in_ip: Inside IPv6 address
        :param out_ip: Outside IPv6 address
        :param vrf_id: VRF ID (Default value = 0)
        :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat66_add_del_static_mapping,
            {'local_ip_address': in_ip,
             'external_ip_address': out_ip,
             'vrf_id': vrf_id,
             'is_add': is_add})

    def nat66_interface_dump(self):
        """Dump interfaces with NAT66 feature
        :return: Dictionary of interfaces with NAT66 feature
        """
        return self.api(self.papi.nat66_interface_dump, {})

    def nat66_static_mapping_dump(self):
        """Dump NAT66 static mappings
        :return: Dictionary of NAT66 static mappings
        """
        return self.api(self.papi.nat66_static_mapping_dump, {})

    def control_ping(self):
        self.api(self.papi.control_ping)

    def bfd_udp_add(self, sw_if_index, desired_min_tx, required_min_rx,
                    detect_mult, local_addr, peer_addr, is_ipv6=0,
                    bfd_key_id=None, conf_key_id=None):
        if bfd_key_id is None:
            return self.api(self.papi.bfd_udp_add,
                            {
                                'sw_if_index': sw_if_index,
                                'desired_min_tx': desired_min_tx,
                                'required_min_rx': required_min_rx,
                                'local_addr': local_addr,
                                'peer_addr': peer_addr,
                                'is_ipv6': is_ipv6,
                                'detect_mult': detect_mult,
                            })
        else:
            return self.api(self.papi.bfd_udp_add,
                            {
                                'sw_if_index': sw_if_index,
                                'desired_min_tx': desired_min_tx,
                                'required_min_rx': required_min_rx,
                                'local_addr': local_addr,
                                'peer_addr': peer_addr,
                                'is_ipv6': is_ipv6,
                                'detect_mult': detect_mult,
                                'is_authenticated': 1,
                                'bfd_key_id': bfd_key_id,
                                'conf_key_id': conf_key_id,
                            })

    def bfd_udp_mod(self, sw_if_index, desired_min_tx, required_min_rx,
                    detect_mult, local_addr, peer_addr, is_ipv6=0):
        return self.api(self.papi.bfd_udp_mod,
                        {
                            'sw_if_index': sw_if_index,
                            'desired_min_tx': desired_min_tx,
                            'required_min_rx': required_min_rx,
                            'local_addr': local_addr,
                            'peer_addr': peer_addr,
                            'is_ipv6': is_ipv6,
                            'detect_mult': detect_mult,
                        })

    def bfd_udp_auth_activate(self, sw_if_index, local_addr, peer_addr,
                              is_ipv6=0, bfd_key_id=None, conf_key_id=None,
                              is_delayed=False):
        return self.api(self.papi.bfd_udp_auth_activate,
                        {
                            'sw_if_index': sw_if_index,
                            'local_addr': local_addr,
                            'peer_addr': peer_addr,
                            'is_ipv6': is_ipv6,
                            'is_delayed': 1 if is_delayed else 0,
                            'bfd_key_id': bfd_key_id,
                            'conf_key_id': conf_key_id,
                        })

    def bfd_udp_auth_deactivate(self, sw_if_index, local_addr, peer_addr,
                                is_ipv6=0, is_delayed=False):
        return self.api(self.papi.bfd_udp_auth_deactivate,
                        {
                            'sw_if_index': sw_if_index,
                            'local_addr': local_addr,
                            'peer_addr': peer_addr,
                            'is_ipv6': is_ipv6,
                            'is_delayed': 1 if is_delayed else 0,
                        })

    def bfd_udp_del(self, sw_if_index, local_addr, peer_addr, is_ipv6=0):
        return self.api(self.papi.bfd_udp_del,
                        {
                            'sw_if_index': sw_if_index,
                            'local_addr': local_addr,
                            'peer_addr': peer_addr,
                            'is_ipv6': is_ipv6,
                        })

    def bfd_udp_session_dump(self):
        return self.api(self.papi.bfd_udp_session_dump, {})

    def bfd_udp_session_set_flags(self, admin_up_down, sw_if_index, local_addr,
                                  peer_addr, is_ipv6=0):
        return self.api(self.papi.bfd_udp_session_set_flags, {
            'admin_up_down': admin_up_down,
            'sw_if_index': sw_if_index,
            'local_addr': local_addr,
            'peer_addr': peer_addr,
            'is_ipv6': is_ipv6,
        })

    def want_bfd_events(self, enable_disable=1):
        return self.api(self.papi.want_bfd_events, {
            'enable_disable': enable_disable,
            'pid': os.getpid(),
        })

    def bfd_auth_set_key(self, conf_key_id, auth_type, key):
        return self.api(self.papi.bfd_auth_set_key, {
            'conf_key_id': conf_key_id,
            'auth_type': auth_type,
            'key': key,
            'key_len': len(key),
        })

    def bfd_auth_del_key(self, conf_key_id):
        return self.api(self.papi.bfd_auth_del_key, {
            'conf_key_id': conf_key_id,
        })

    def bfd_auth_keys_dump(self):
        return self.api(self.papi.bfd_auth_keys_dump, {})

    def bfd_udp_set_echo_source(self, sw_if_index):
        return self.api(self.papi.bfd_udp_set_echo_source,
                        {'sw_if_index': sw_if_index})

    def bfd_udp_del_echo_source(self):
        return self.api(self.papi.bfd_udp_del_echo_source, {})

    def bfd_udp_get_echo_source(self):
        return self.api(self.papi.bfd_udp_get_echo_source, {})

    def classify_add_del_table(
            self,
            is_add,
            mask,
            match_n_vectors=1,
            table_index=0xFFFFFFFF,
            nbuckets=2,
            memory_size=2097152,
            skip_n_vectors=0,
            next_table_index=0xFFFFFFFF,
            miss_next_index=0xFFFFFFFF,
            current_data_flag=0,
            current_data_offset=0):
        """
        :param is_add:
        :param mask:
        :param match_n_vectors: (Default value = 1)
        :param table_index: (Default value = 0xFFFFFFFF)
        :param nbuckets:  (Default value = 2)
        :param memory_size:  (Default value = 2097152)
        :param skip_n_vectors:  (Default value = 0)
        :param next_table_index:  (Default value = 0xFFFFFFFF)
        :param miss_next_index:  (Default value = 0xFFFFFFFF)
        :param current_data_flag:  (Default value = 0)
        :param current_data_offset:  (Default value = 0)
        """

        mask_len = ((len(mask) - 1) / 16 + 1) * 16
        mask = mask + '\0' * (mask_len - len(mask))
        return self.api(
            self.papi.classify_add_del_table,
            {'is_add': is_add,
             'table_index': table_index,
             'nbuckets': nbuckets,
             'memory_size': memory_size,
             'skip_n_vectors': skip_n_vectors,
             'match_n_vectors': match_n_vectors,
             'next_table_index': next_table_index,
             'miss_next_index': miss_next_index,
             'current_data_flag': current_data_flag,
             'current_data_offset': current_data_offset,
             'mask_len': mask_len,
             'mask': mask})

    def classify_add_del_session(
            self,
            is_add,
            table_index,
            match,
            opaque_index=0xFFFFFFFF,
            hit_next_index=0xFFFFFFFF,
            advance=0,
            action=0,
            metadata=0):
        """
        :param is_add:
        :param table_index:
        :param match:
        :param opaque_index:  (Default value = 0xFFFFFFFF)
        :param hit_next_index:  (Default value = 0xFFFFFFFF)
        :param advance:  (Default value = 0)
        :param action:  (Default value = 0)
        :param metadata:  (Default value = 0)
        """

        match_len = ((len(match) - 1) / 16 + 1) * 16
        match = match + '\0' * (match_len - len(match))
        return self.api(
            self.papi.classify_add_del_session,
            {'is_add': is_add,
             'table_index': table_index,
             'hit_next_index': hit_next_index,
             'opaque_index': opaque_index,
             'advance': advance,
             'action': action,
             'metadata': metadata,
             'match_len': match_len,
             'match': match})

    def input_acl_set_interface(
            self,
            is_add,
            sw_if_index,
            ip4_table_index=0xFFFFFFFF,
            ip6_table_index=0xFFFFFFFF,
            l2_table_index=0xFFFFFFFF):
        """
        :param is_add:
        :param sw_if_index:
        :param ip4_table_index:  (Default value = 0xFFFFFFFF)
        :param ip6_table_index:  (Default value = 0xFFFFFFFF)
        :param l2_table_index:  (Default value = 0xFFFFFFFF)
        """

        return self.api(
            self.papi.input_acl_set_interface,
            {'sw_if_index': sw_if_index,
             'ip4_table_index': ip4_table_index,
             'ip6_table_index': ip6_table_index,
             'l2_table_index': l2_table_index,
             'is_add': is_add})

    def output_acl_set_interface(
            self,
            is_add,
            sw_if_index,
            ip4_table_index=0xFFFFFFFF,
            ip6_table_index=0xFFFFFFFF,
            l2_table_index=0xFFFFFFFF):
        """
        :param is_add:
        :param sw_if_index:
        :param ip4_table_index:  (Default value = 0xFFFFFFFF)
        :param ip6_table_index:  (Default value = 0xFFFFFFFF)
        :param l2_table_index:  (Default value = 0xFFFFFFFF)
        """

        return self.api(
            self.papi.output_acl_set_interface,
            {'sw_if_index': sw_if_index,
             'ip4_table_index': ip4_table_index,
             'ip6_table_index': ip6_table_index,
             'l2_table_index': l2_table_index,
             'is_add': is_add})

    def set_ipfix_exporter(
            self,
            collector_address,
            src_address,
            path_mtu,
            template_interval,
            vrf_id=0,
            collector_port=4739,
            udp_checksum=0):
        return self.api(
            self.papi.set_ipfix_exporter,
            {
                'collector_address': collector_address,
                'collector_port': collector_port,
                'src_address': src_address,
                'vrf_id': vrf_id,
                'path_mtu': path_mtu,
                'template_interval': template_interval,
                'udp_checksum': udp_checksum,
            })

    def dhcp_proxy_config(self,
                          dhcp_server,
                          dhcp_src_address,
                          rx_table_id=0,
                          server_table_id=0,
                          is_add=1,
                          is_ipv6=0):
        return self.api(
            self.papi.dhcp_proxy_config,
            {
                'rx_vrf_id': rx_table_id,
                'server_vrf_id': server_table_id,
                'is_ipv6': is_ipv6,
                'is_add': is_add,
                'dhcp_server': dhcp_server,
                'dhcp_src_address': dhcp_src_address,
            })

    def dhcp_proxy_set_vss(self,
                           table_id,
                           vss_type=255,
                           vpn_ascii_id="",
                           oui=0,
                           vpn_index=0,
                           is_add=1,
                           is_ip6=0):
        return self.api(
            self.papi.dhcp_proxy_set_vss,
            {
                'tbl_id': table_id,
                'vss_type': vss_type,
                'vpn_ascii_id': vpn_ascii_id,
                'oui': oui,
                'vpn_index': vpn_index,
                'is_add': is_add,
                'is_ipv6': is_ip6,
            })

    def dhcp_client_dump(self):
        return self.api(self.papi.dhcp_client_dump, {})

    def dhcp_client(self,
                    sw_if_index,
                    hostname,
                    client_id='',
                    is_add=1,
                    set_broadcast_flag=1,
                    want_dhcp_events=0):
        return self.api(
            self.papi.dhcp_client_config,
            {
                'is_add': is_add,
                'client': {
                    'sw_if_index': sw_if_index,
                    'hostname': hostname,
                    'id': client_id,
                    'want_dhcp_event': want_dhcp_events,
                    'set_broadcast_flag': set_broadcast_flag,
                    'pid': os.getpid()}
            })

    def ip_mroute_add_del(self,
                          src_address,
                          grp_address,
                          grp_address_length,
                          e_flags,
                          next_hop_afi,
                          next_hop_sw_if_index,
                          next_hop_address,
                          i_flags,
                          bier_imp=0,
                          rpf_id=0,
                          table_id=0,
                          is_add=1,
                          is_ipv6=0,
                          is_local=0):
        """
        IP Multicast Route add/del
        """
        return self.api(
            self.papi.ip_mroute_add_del,
            {'next_hop_sw_if_index': next_hop_sw_if_index,
             'entry_flags': e_flags,
             'itf_flags': i_flags,
             'table_id': table_id,
             'rpf_id': rpf_id,
             'is_add': is_add,
             'is_ipv6': is_ipv6,
             'is_local': is_local,
             'bier_imp': bier_imp,
             'next_hop_afi': next_hop_afi,
             'grp_address_length': grp_address_length,
             'grp_address': grp_address,
             'src_address': src_address,
             'nh_address': next_hop_address})

    def mfib_signal_dump(self):
        return self.api(self.papi.mfib_signal_dump, {})

    def ip_mfib_dump(self):
        return self.api(self.papi.ip_mfib_dump, {})

    def ip6_mfib_dump(self):
        return self.api(self.papi.ip6_mfib_dump, {})

    def lisp_enable_disable(self, is_enabled):
        return self.api(
            self.papi.lisp_enable_disable,
            {
                'is_en': is_enabled,
            })

    def lisp_locator_set(self,
                         ls_name,
                         is_add=1):
        return self.api(
            self.papi.lisp_add_del_locator_set,
            {
                'is_add': is_add,
                'locator_set_name': ls_name
            })

    def lisp_locator_set_dump(self):
        return self.api(self.papi.lisp_locator_set_dump, {})

    def lisp_locator(self,
                     ls_name,
                     sw_if_index,
                     priority=1,
                     weight=1,
                     is_add=1):
        return self.api(
            self.papi.lisp_add_del_locator,
            {
                'is_add': is_add,
                'locator_set_name': ls_name,
                'sw_if_index': sw_if_index,
                'priority': priority,
                'weight': weight
            })

    def lisp_locator_dump(self, is_index_set, ls_name=None, ls_index=0):
        return self.api(
            self.papi.lisp_locator_dump,
            {
                'is_index_set': is_index_set,
                'ls_name': ls_name,
                'ls_index': ls_index,
            })

    def lisp_local_mapping(self,
                           ls_name,
                           eid_type,
                           eid,
                           prefix_len,
                           vni=0,
                           key_id=0,
                           key="",
                           is_add=1):
        return self.api(
            self.papi.lisp_add_del_local_eid,
            {
                'locator_set_name': ls_name,
                'is_add': is_add,
                'eid_type': eid_type,
                'eid': eid,
                'prefix_len': prefix_len,
                'vni': vni,
                'key_id': key_id,
                'key': key
            })

    def lisp_eid_table_dump(self,
                            eid_set=0,
                            prefix_length=0,
                            vni=0,
                            eid_type=0,
                            eid=None,
                            filter_opt=0):
        return self.api(
            self.papi.lisp_eid_table_dump,
            {
                'eid_set': eid_set,
                'prefix_length': prefix_length,
                'vni': vni,
                'eid_type': eid_type,
                'eid': eid,
                'filter': filter_opt,
            })

    def lisp_remote_mapping(self,
                            eid_type,
                            eid,
                            eid_prefix_len=0,
                            vni=0,
                            rlocs=[],
                            rlocs_num=0,
                            is_src_dst=0,
                            is_add=1):
        return self.api(
            self.papi.lisp_add_del_remote_mapping,
            {
                'is_add': is_add,
                'eid_type': eid_type,
                'eid': eid,
                'eid_len': eid_prefix_len,
                'rloc_num': rlocs_num,
                'rlocs': rlocs,
                'vni': vni,
                'is_src_dst': is_src_dst,
            })

    def lisp_adjacency(self,
                       leid,
                       reid,
                       leid_len,
                       reid_len,
                       eid_type,
                       is_add=1,
                       vni=0):
        return self.api(
            self.papi.lisp_add_del_adjacency,
            {
                'is_add': is_add,
                'vni': vni,
                'eid_type': eid_type,
                'leid': leid,
                'reid': reid,
                'leid_len': leid_len,
                'reid_len': reid_len,
            })

    def lisp_adjacencies_get(self, vni=0):
        return self.api(
            self.papi.lisp_adjacencies_get,
            {
                'vni': vni
            })

    def map_add_domain(self,
                       ip6_prefix,
                       ip6_src,
                       ip4_prefix,
                       ea_bits_len=0,
                       psid_offset=0,
                       psid_length=0,
                       mtu=1280):

        return self.api(
            self.papi.map_add_domain,
            {
                'ip6_prefix': ip6_prefix,
                'ip4_prefix': ip4_prefix,
                'ip6_src': ip6_src,
                'ea_bits_len': ea_bits_len,
                'psid_offset': psid_offset,
                'psid_length': psid_length,
                'mtu': mtu
            })

    def map_if_enable_disable(self, is_enable, sw_if_index, is_translation):
        return self.api(
            self.papi.map_if_enable_disable,
            {
                'is_enable': is_enable,
                'sw_if_index': sw_if_index,
                'is_translation': is_translation,
            })

    def map_param_set_tcp(self, tcp_mss):
        return self.api(
            self.papi.map_param_set_tcp,
            {
                'tcp_mss': tcp_mss,
            })

    def gtpu_add_del_tunnel(
            self,
            src_addr,
            dst_addr,
            is_add=1,
            is_ipv6=0,
            mcast_sw_if_index=0xFFFFFFFF,
            encap_vrf_id=0,
            decap_next_index=0xFFFFFFFF,
            teid=0):
        """

        :param is_add:  (Default value = 1)
        :param is_ipv6:  (Default value = 0)
        :param src_addr:
        :param dst_addr:
        :param mcast_sw_if_index:  (Default value = 0xFFFFFFFF)
        :param encap_vrf_id:  (Default value = 0)
        :param decap_next_index:  (Default value = 0xFFFFFFFF)
        :param teid:  (Default value = 0)

        """
        return self.api(self.papi.gtpu_add_del_tunnel,
                        {'is_add': is_add,
                         'is_ipv6': is_ipv6,
                         'src_address': src_addr,
                         'dst_address': dst_addr,
                         'mcast_sw_if_index': mcast_sw_if_index,
                         'encap_vrf_id': encap_vrf_id,
                         'decap_next_index': decap_next_index,
                         'teid': teid})

    def vxlan_gpe_add_del_tunnel(
            self,
            src_addr,
            dst_addr,
            mcast_sw_if_index=0xFFFFFFFF,
            is_add=1,
            is_ipv6=0,
            encap_vrf_id=0,
            decap_vrf_id=0,
            protocol=3,
            vni=0):
        """

        :param local:
        :param remote:
        :param is_add:  (Default value = 1)
        :param is_ipv6:  (Default value = 0)
        :param encap_vrf_id:  (Default value = 0)
        :param decap_vrf_id:  (Default value = 0)
        :param mcast_sw_if_index:  (Default value = 0xFFFFFFFF)
        :param protocol:  (Default value = 3)
        :param vni:  (Default value = 0)

        """
        return self.api(self.papi.vxlan_gpe_add_del_tunnel,
                        {'is_add': is_add,
                         'is_ipv6': is_ipv6,
                         'local': src_addr,
                         'remote': dst_addr,
                         'mcast_sw_if_index': mcast_sw_if_index,
                         'encap_vrf_id': encap_vrf_id,
                         'decap_vrf_id': decap_vrf_id,
                         'protocol': protocol,
                         'vni': vni})

    def vxlan_gbp_tunnel_add_del(
            self,
            src,
            dst,
            mcast_sw_if_index=0xFFFFFFFF,
            is_add=1,
            is_ipv6=0,
            encap_table_id=0,
            vni=0,
            instance=0xFFFFFFFF):
        """

        :param dst_addr:
        :param src_addr:
        :param is_add:  (Default value = 1)
        :param is_ipv6:  (Default value = 0)
        :param encap_table_id:  (Default value = 0)
        :param decap_next_index:  (Default value = 0xFFFFFFFF)
        :param mcast_sw_if_index:  (Default value = 0xFFFFFFFF)
        :param vni:  (Default value = 0)
        :param instance:  (Default value = 0xFFFFFFFF)

        """
        return self.api(self.papi.vxlan_gbp_tunnel_add_del,
                        {'is_add': is_add,
                         'tunnel': {
                             'src': src,
                             'dst': dst,
                             'mcast_sw_if_index': mcast_sw_if_index,
                             'encap_table_id': encap_table_id,
                             'vni': vni,
                             'instance': instance}})

    def vxlan_gbp_tunnel_dump(self, sw_if_index=0xffffffff):
        return self.api(self.papi.vxlan_gbp_tunnel_dump,
                        {'sw_if_index': sw_if_index,
                         '_no_type_conversion': True})

    def pppoe_add_del_session(
            self,
            client_ip,
            client_mac,
            session_id=0,
            is_add=1,
            is_ipv6=0,
            decap_vrf_id=0):
        """

        :param is_add:  (Default value = 1)
        :param is_ipv6:  (Default value = 0)
        :param client_ip:
        :param session_id:  (Default value = 0)
        :param client_mac:
        :param decap_vrf_id:  (Default value = 0)

        """
        return self.api(self.papi.pppoe_add_del_session,
                        {'is_add': is_add,
                         'is_ipv6': is_ipv6,
                         'session_id': session_id,
                         'client_ip': client_ip,
                         'decap_vrf_id': decap_vrf_id,
                         'client_mac': client_mac})

    def sr_mpls_policy_add(self, bsid, weight, type, segments):
        return self.api(self.papi.sr_mpls_policy_add,
                        {'bsid': bsid,
                         'weight': weight,
                         'type': type,
                         'n_segments': len(segments),
                         'segments': segments})

    def sr_mpls_policy_del(self, bsid):
        return self.api(self.papi.sr_mpls_policy_del,
                        {'bsid': bsid})

    def sr_localsid_add_del(self,
                            localsid,
                            behavior,
                            nh_addr4,
                            nh_addr6,
                            is_del=0,
                            end_psp=0,
                            sw_if_index=0xFFFFFFFF,
                            vlan_index=0,
                            fib_table=0,
                            ):
        """ Add/del IPv6 SR local-SID.

        :param localsid:
        :param behavior: END=1; END.X=2; END.DX2=4; END.DX6=5;
        :param behavior: END.DX4=6; END.DT6=7; END.DT4=8
        :param nh_addr4:
        :param nh_addr6:
        :param is_del:  (Default value = 0)
        :param end_psp: (Default value = 0)
        :param sw_if_index: (Default value = 0xFFFFFFFF)
        :param vlan_index:  (Default value = 0)
        :param fib_table:   (Default value = 0)
        """
        return self.api(
            self.papi.sr_localsid_add_del,
            {'is_del': is_del,
             'localsid': localsid,
             'end_psp': end_psp,
             'behavior': behavior,
             'sw_if_index': sw_if_index,
             'vlan_index': vlan_index,
             'fib_table': fib_table,
             'nh_addr4': nh_addr4,
             'nh_addr6': nh_addr6
             }
        )

    def sr_policy_add(
            self,
            bsid_addr,
            weight=1,
            is_encap=1,
            type=0,
            fib_table=0,
            n_segments=0,
            segments=[]):
        """
        :param bsid_addr: bindingSID of the SR Policy
        :param weight: weight of the sid list. optional. (default: 1)
        :param is_encap: (bool) whether SR policy should Encap or SRH insert \
            (default: Encap)
        :param type: type/behavior of the SR policy. (default or spray) \
            (default: default)
        :param fib_table: VRF where to install the FIB entry for the BSID \
            (default: 0)
        :param n_segments: number of segments \
            (default: 0)
        :param segments: a vector of IPv6 address composing the segment list \
            (default: [])
        """
        return self.api(
            self.papi.sr_policy_add,
            {'bsid_addr': bsid_addr,
             'weight': weight,
             'is_encap': is_encap,
             'type': type,
             'fib_table': fib_table,
             'n_segments': n_segments,
             'segments': segments
             }
        )

    def sr_policy_del(
            self,
            bsid_addr,
            sr_policy_index=0):
        """
        :param bsid: bindingSID of the SR Policy
        :param sr_policy_index: index of the sr policy (default: 0)
        """
        return self.api(
            self.papi.sr_policy_del,
            {'bsid_addr': bsid_addr,
             'sr_policy_index': sr_policy_index
             })

    def sr_steering_add_del(
            self,
            is_del,
            bsid_addr,
            sr_policy_index,
            table_id,
            prefix_addr,
            mask_width,
            sw_if_index,
            traffic_type):
        """
        Steer traffic L2 and L3 traffic through a given SR policy

        :param is_del: delete or add
        :param bsid_addr: bindingSID of the SR Policy (alt to sr_policy_index)
        :param sr_policy: is the index of the SR Policy (alt to bsid)
        :param table_id: is the VRF where to install the FIB entry for the BSID
        :param prefix_addr: is the IPv4/v6 address for L3 traffic type
        :param mask_width: is the mask for L3 traffic type
        :param sw_if_index: is the incoming interface for L2 traffic
        :param traffic_type: type of traffic (IPv4: 4, IPv6: 6, L2: 2)
        """
        return self.api(
            self.papi.sr_steering_add_del,
            {'is_del': is_del,
             'bsid_addr': bsid_addr,
             'sr_policy_index': sr_policy_index,
             'table_id': table_id,
             'prefix_addr': prefix_addr,
             'mask_width': mask_width,
             'sw_if_index': sw_if_index,
             'traffic_type': traffic_type
             })

    def acl_add_replace(self, acl_index, r, tag='',
                        expected_retval=0):
        """Add/replace an ACL
        :param int acl_index: ACL index to replace, 2^32-1 to create new ACL.
        :param acl_rule r: ACL rules array.
        :param str tag: symbolic tag (description) for this ACL.
        :param int count: number of rules.
        """
        return self.api(self.papi.acl_add_replace,
                        {'acl_index': acl_index,
                         'r': r,
                         'count': len(r),
                         'tag': tag},
                        expected_retval=expected_retval)

    def acl_del(self, acl_index, expected_retval=0):
        """

        :param acl_index:
        :return:
        """
        return self.api(self.papi.acl_del,
                        {'acl_index': acl_index},
                        expected_retval=expected_retval)

    def acl_interface_set_acl_list(self, sw_if_index, n_input, acls,
                                   expected_retval=0):
        return self.api(self.papi.acl_interface_set_acl_list,
                        {'sw_if_index': sw_if_index,
                         'count': len(acls),
                         'n_input': n_input,
                         'acls': acls},
                        expected_retval=expected_retval)

    def acl_interface_set_etype_whitelist(self, sw_if_index,
                                          n_input, whitelist,
                                          expected_retval=0):
        return self.api(self.papi.acl_interface_set_etype_whitelist,
                        {'sw_if_index': sw_if_index,
                         'count': len(whitelist),
                         'n_input': n_input,
                         'whitelist': whitelist},
                        expected_retval=expected_retval)

    def acl_interface_add_del(self,
                              sw_if_index,
                              acl_index,
                              is_add=1):
        """ Add/Delete ACL to/from interface

        :param sw_if_index:
        :param acl_index:
        :param is_add:  (Default value = 1)
        """

        return self.api(self.papi.acl_interface_add_del,
                        {'is_add': is_add,
                         'is_input': 1,
                         'sw_if_index': sw_if_index,
                         'acl_index': acl_index})

    def acl_dump(self, acl_index, expected_retval=0):
        return self.api(self.papi.acl_dump,
                        {'acl_index': acl_index},
                        expected_retval=expected_retval)

    def acl_interface_list_dump(self, sw_if_index=0xFFFFFFFF,
                                expected_retval=0):
        return self.api(self.papi.acl_interface_list_dump,
                        {'sw_if_index': sw_if_index},
                        expected_retval=expected_retval)

    def macip_acl_add(self, rules, tag=""):
        """ Add MACIP acl

        :param rules: list of rules for given acl
        :param tag: acl tag
        """

        return self.api(self.papi.macip_acl_add,
                        {'r': rules,
                         'count': len(rules),
                         'tag': tag})

    def macip_acl_add_replace(self, rules, acl_index=0xFFFFFFFF, tag=""):
        """ Add MACIP acl

        :param rules: list of rules for given acl
        :param tag: acl tag
        """

        return self.api(self.papi.macip_acl_add_replace,
                        {'acl_index': acl_index,
                         'r': rules,
                         'count': len(rules),
                         'tag': tag})

    def macip_acl_del(self, acl_index):
        """

        :param acl_index:
        :return:
        """
        return self.api(self.papi.macip_acl_del,
                        {'acl_index': acl_index})

    def macip_acl_interface_add_del(self,
                                    sw_if_index,
                                    acl_index,
                                    is_add=1):
        """ Add MACIP acl to interface

        :param sw_if_index:
        :param acl_index:
        :param is_add:  (Default value = 1)
        """

        return self.api(self.papi.macip_acl_interface_add_del,
                        {'is_add': is_add,
                         'sw_if_index': sw_if_index,
                         'acl_index': acl_index})

    def macip_acl_interface_get(self):
        """ Return interface acls dump
        """
        return self.api(
            self.papi.macip_acl_interface_get, {})

    def macip_acl_dump(self, acl_index=4294967295):
        """ Return MACIP acl dump
        """

        return self.api(
            self.papi.macip_acl_dump, {'acl_index': acl_index})

    def policer_add_del(self,
                        name,
                        cir,
                        eir,
                        cb,
                        eb,
                        is_add=1,
                        rate_type=0,
                        round_type=0,
                        ptype=0,
                        color_aware=0,
                        conform_action_type=1,
                        conform_dscp=0,
                        exceed_action_type=0,
                        exceed_dscp=0,
                        violate_action_type=0,
                        violate_dscp=0):
        return self.api(self.papi.policer_add_del,
                        {'name': name,
                         'cir': cir,
                         'eir': eir,
                         'cb': cb,
                         'eb': eb,
                         'is_add': is_add,
                         'rate_type': rate_type,
                         'round_type': round_type,
                         'type': ptype,
                         'color_aware': color_aware,
                         'conform_action_type': conform_action_type,
                         'conform_dscp': conform_dscp,
                         'exceed_action_type': exceed_action_type,
                         'exceed_dscp': exceed_dscp,
                         'violate_action_type': violate_action_type,
                         'violate_dscp': violate_dscp})

    def ip_punt_police(self,
                       policer_index,
                       is_ip6=0,
                       is_add=1):
        return self.api(self.papi.ip_punt_police,
                        {'policer_index': policer_index,
                         'is_add': is_add,
                         'is_ip6': is_ip6})

    def ip_punt_redirect(self,
                         rx_sw_if_index,
                         tx_sw_if_index,
                         address,
                         is_add=1):
        return self.api(self.papi.ip_punt_redirect,
                        {'punt': {'rx_sw_if_index': rx_sw_if_index,
                                  'tx_sw_if_index': tx_sw_if_index,
                                  'nh': address},
                         'is_add': is_add})

    def ip_punt_redirect_dump(self, sw_if_index, is_ipv6=0):
        return self.api(self.papi.ip_punt_redirect_dump,
                        {'sw_if_index': sw_if_index,
                         'is_ipv6': is_ipv6})

    def bier_table_add_del(self,
                           bti,
                           mpls_label,
                           is_add=1):
        """ BIER Table add/del """
        return self.api(
            self.papi.bier_table_add_del,
            {'bt_tbl_id': {"bt_set": bti.set_id,
                           "bt_sub_domain": bti.sub_domain_id,
                           "bt_hdr_len_id": bti.hdr_len_id},
             'bt_label': mpls_label,
             'bt_is_add': is_add})

    def bier_table_dump(self):
        return self.api(self.papi.bier_table_dump, {})

    def bier_route_add_del(self,
                           bti,
                           bp,
                           paths,
                           is_add=1,
                           is_replace=0):
        """ BIER Route add/del """
        return self.api(
            self.papi.bier_route_add_del,
            {'br_tbl_id': {"bt_set": bti.set_id,
                           "bt_sub_domain": bti.sub_domain_id,
                           "bt_hdr_len_id": bti.hdr_len_id},
             'br_bp': bp,
             'br_n_paths': len(paths),
             'br_paths': paths,
             'br_is_add': is_add,
             'br_is_replace': is_replace})

    def bier_route_dump(self, bti):
        return self.api(
            self.papi.bier_route_dump,
            {'br_tbl_id': {"bt_set": bti.set_id,
                           "bt_sub_domain": bti.sub_domain_id,
                           "bt_hdr_len_id": bti.hdr_len_id}})

    def bier_imp_add(self,
                     bti,
                     src,
                     ibytes,
                     is_add=1):
        """ BIER Imposition Add """
        return self.api(
            self.papi.bier_imp_add,
            {'bi_tbl_id': {"bt_set": bti.set_id,
                           "bt_sub_domain": bti.sub_domain_id,
                           "bt_hdr_len_id": bti.hdr_len_id},
             'bi_src': src,
             'bi_n_bytes': len(ibytes),
             'bi_bytes': ibytes})

    def bier_imp_del(self, bi_index):
        """ BIER Imposition del """
        return self.api(
            self.papi.bier_imp_del,
            {'bi_index': bi_index})

    def bier_imp_dump(self):
        return self.api(self.papi.bier_imp_dump, {})

    def bier_disp_table_add_del(self,
                                bdti,
                                is_add=1):
        """ BIER Disposition Table add/del """
        return self.api(
            self.papi.bier_disp_table_add_del,
            {'bdt_tbl_id': bdti,
             'bdt_is_add': is_add})

    def bier_disp_table_dump(self):
        return self.api(self.papi.bier_disp_table_dump, {})

    def bier_disp_entry_add_del(self,
                                bdti,
                                bp,
                                payload_proto,
                                next_hop_afi,
                                next_hop,
                                next_hop_tbl_id=0,
                                next_hop_rpf_id=~0,
                                next_hop_is_ip4=1,
                                is_add=1):
        """ BIER Route add/del """
        lstack = []
        while (len(lstack) < 16):
            lstack.append({})
        return self.api(
            self.papi.bier_disp_entry_add_del,
            {'bde_tbl_id': bdti,
             'bde_bp': bp,
             'bde_payload_proto': payload_proto,
             'bde_n_paths': 1,
             'bde_paths': [{'next_hop': next_hop,
                            'table_id': next_hop_tbl_id,
                            'afi': next_hop_afi,
                            'rpf_id': next_hop_rpf_id,
                            'n_labels': 0,
                            'label_stack': lstack}],
             'bde_is_add': is_add})

    def bier_disp_entry_dump(self, bdti):
        return self.api(
            self.papi.bier_disp_entry_dump,
            {'bde_tbl_id': bdti})

    def add_node_next(self, node_name, next_name):
        """ Set the next node for a given node request

        :param node_name:
        :param next_name:
        """
        return self.api(self.papi.add_node_next,
                        {'node_name': node_name,
                         'next_name': next_name})

    def session_enable_disable(self, is_enabled):
        return self.api(
            self.papi.session_enable_disable,
            {'is_enable': is_enabled})

    def ipsec_spd_add_del(self, spd_id, is_add=1):
        """ SPD add/del - Wrapper to add or del ipsec SPD
        Sample CLI : 'ipsec spd add 1'

        :param spd_id - SPD ID to be created in the vpp . mandatory
        :param is_add - create (1) or delete(0) SPD (Default 1 - add) .
              optional
        :returns: reply from the API
        """
        return self.api(
            self.papi.ipsec_spd_add_del, {
                'spd_id': spd_id, 'is_add': is_add})

    def ipsec_spds_dump(self):
        return self.api(self.papi.ipsec_spds_dump, {})

    def ipsec_interface_add_del_spd(self, spd_id, sw_if_index, is_add=1):
        """ IPSEC interface SPD add/del - \
             Wrapper to associate/disassociate SPD to interface in VPP
        Sample CLI : 'set interface ipsec spd GigabitEthernet0/6/0 1'

        :param spd_id - SPD ID to associate with the interface . mandatory
        :param sw_if_index - Interface Index which needs to ipsec \
            association mandatory
        :param is_add - add(1) or del(0) association with interface \
                (Default 1 - add) . optional
        :returns: reply from the API
        """
        return self.api(
            self.papi.ipsec_interface_add_del_spd,
            {'spd_id': spd_id, 'sw_if_index': sw_if_index, 'is_add': is_add})

    def ipsec_spd_interface_dump(self, spd_index=None):
        return self.api(self.papi.ipsec_spd_interface_dump,
                        {'spd_index': spd_index if spd_index else 0,
                         'spd_index_valid': 1 if spd_index else 0})

    def ipsec_sad_entry_add_del(self,
                                sad_id,
                                spi,
                                integrity_algorithm,
                                integrity_key,
                                crypto_algorithm,
                                crypto_key,
                                protocol,
                                tunnel_src_address='',
                                tunnel_dst_address='',
                                flags=0,
                                is_add=1):
        """ IPSEC SA add/del
        :param sad_id: security association ID
        :param spi: security param index of the SA in decimal
        :param integrity_algorithm:
        :param integrity_key:
        :param crypto_algorithm:
        :param crypto_key:
        :param protocol: AH(0) or ESP(1) protocol
        :param tunnel_src_address: tunnel mode outer src address
        :param tunnel_dst_address: tunnel mode outer dst address
        :param is_add:
        :param is_tunnel:
        :** reference /vpp/src/vnet/ipsec/ipsec.h file for enum values of
             crypto and ipsec algorithms
        """
        return self.api(
            self.papi.ipsec_sad_entry_add_del,
            {
                'is_add': is_add,
                'entry':
                {
                    'sad_id': sad_id,
                    'spi': spi,
                    'tunnel_src': tunnel_src_address,
                    'tunnel_dst': tunnel_dst_address,
                    'protocol': protocol,
                    'integrity_algorithm': integrity_algorithm,
                    'integrity_key': {
                        'length': len(integrity_key),
                        'data': integrity_key,
                    },
                    'crypto_algorithm': crypto_algorithm,
                    'crypto_key': {
                        'length': len(crypto_key),
                        'data': crypto_key,
                    },
                    'flags': flags,
                }
            })

    def ipsec_sa_dump(self, sa_id=None):
        return self.api(self.papi.ipsec_sa_dump,
                        {'sa_id': sa_id if sa_id else 0xffffffff})

    def ipsec_spd_entry_add_del(self,
                                spd_id,
                                sa_id,
                                local_address_start,
                                local_address_stop,
                                remote_address_start,
                                remote_address_stop,
                                local_port_start=0,
                                local_port_stop=65535,
                                remote_port_start=0,
                                remote_port_stop=65535,
                                protocol=0,
                                policy=0,
                                priority=100,
                                is_outbound=1,
                                is_add=1,
                                is_ipv6=0,
                                is_ip_any=0):
        """ IPSEC policy SPD add/del   -
                    Wrapper to configure ipsec SPD policy entries in VPP
        :param spd_id: SPD ID for the policy
        :param local_address_start: local-ip-range start address
        :param local_address_stop : local-ip-range stop address
        :param remote_address_start: remote-ip-range start address
        :param remote_address_stop : remote-ip-range stop address
        :param local_port_start: (Default value = 0)
        :param local_port_stop: (Default value = 65535)
        :param remote_port_start: (Default value = 0)
        :param remote_port_stop: (Default value = 65535)
        :param protocol: Any(0), AH(51) & ESP(50) protocol (Default value = 0)
        :param sa_id: Security Association ID for mapping it to SPD
        :param policy: bypass(0), discard(1), resolve(2) or protect(3) action
               (Default value = 0)
        :param priority: value for the spd action (Default value = 100)
        :param is_outbound: flag for inbound(0) or outbound(1)
               (Default value = 1)
        :param is_add: (Default value = 1)
        """
        return self.api(
            self.papi.ipsec_spd_entry_add_del,
            {
                'is_add': is_add,
                'entry':
                {
                    'spd_id': spd_id,
                    'sa_id': sa_id,
                    'local_address_start': local_address_start,
                    'local_address_stop': local_address_stop,
                    'remote_address_start': remote_address_start,
                    'remote_address_stop': remote_address_stop,
                    'local_port_start': local_port_start,
                    'local_port_stop': local_port_stop,
                    'remote_port_start': remote_port_start,
                    'remote_port_stop': remote_port_stop,
                    'protocol': protocol,
                    'policy': policy,
                    'priority': priority,
                    'is_outbound': is_outbound,
                    'is_ip_any': is_ip_any
                }
            })

    def ipsec_spd_dump(self, spd_id, sa_id=0xffffffff):
        return self.api(self.papi.ipsec_spd_dump,
                        {'spd_id': spd_id,
                         'sa_id': sa_id})

    def ipsec_tunnel_if_add_del(self, local_ip, remote_ip, local_spi,
                                remote_spi, crypto_alg, local_crypto_key,
                                remote_crypto_key, integ_alg, local_integ_key,
                                remote_integ_key, is_add=1, esn=0,
                                anti_replay=1, renumber=0, show_instance=0):
        return self.api(
            self.papi.ipsec_tunnel_if_add_del,
            {'local_ip': local_ip, 'remote_ip': remote_ip,
             'local_spi': local_spi, 'remote_spi': remote_spi,
             'crypto_alg': crypto_alg,
             'local_crypto_key_len': len(local_crypto_key),
             'local_crypto_key': local_crypto_key,
             'remote_crypto_key_len': len(remote_crypto_key),
             'remote_crypto_key': remote_crypto_key, 'integ_alg': integ_alg,
             'local_integ_key_len': len(local_integ_key),
             'local_integ_key': local_integ_key,
             'remote_integ_key_len': len(remote_integ_key),
             'remote_integ_key': remote_integ_key, 'is_add': is_add,
             'esn': esn, 'anti_replay': anti_replay, 'renumber': renumber,
             'show_instance': show_instance
             })

    def ipsec_select_backend(self, protocol, index):
        return self.api(self.papi.ipsec_select_backend,
                        {'protocol': protocol, 'index': index})

    def ipsec_backend_dump(self):
        return self.api(self.papi.ipsec_backend_dump, {})

    def app_namespace_add(self,
                          namespace_id,
                          ip4_fib_id=0,
                          ip6_fib_id=0,
                          sw_if_index=0xFFFFFFFF,
                          secret=0):
        return self.api(
            self.papi.app_namespace_add_del,
            {'secret': secret,
             'sw_if_index': sw_if_index,
             'ip4_fib_id': ip4_fib_id,
             'ip6_fib_id': ip6_fib_id,
             'namespace_id': namespace_id,
             'namespace_id_len': len(namespace_id)})

    def punt_socket_register(self, port, pathname, protocol=0x11,
                             header_version=1, is_ip4=1):
        """ Register punt socket """
        return self.api(self.papi.punt_socket_register,
                        {'header_version': header_version,
                         'punt': {'ipv': is_ip4,
                                  'l4_protocol': protocol,
                                  'l4_port': port},
                         'pathname': pathname})

    def punt_socket_deregister(self, port, protocol=0x11, is_ip4=1):
        """ Unregister punt socket """
        return self.api(self.papi.punt_socket_deregister,
                        {'punt': {'ipv': is_ip4,
                                  'l4_protocol': protocol,
                                  'l4_port': port}})

    def punt_socket_dump(self, is_ip6=1):
        """ Dump punt socket"""
        return self.api(self.papi.punt_socket_dump,
                        {'is_ipv6': is_ip6})

    def ip_reassembly_set(self, timeout_ms, max_reassemblies,
                          expire_walk_interval_ms, is_ip6=0):
        """ Set IP reassembly parameters """
        return self.api(self.papi.ip_reassembly_set,
                        {'is_ip6': is_ip6,
                         'timeout_ms': timeout_ms,
                         'expire_walk_interval_ms': expire_walk_interval_ms,
                         'max_reassemblies': max_reassemblies})

    def ip_reassembly_get(self, is_ip6=0):
        """ Get IP reassembly parameters """
        return self.api(self.papi.ip_reassembly_get, {'is_ip6': is_ip6})

    def ip_reassembly_enable_disable(self, sw_if_index, enable_ip4=False,
                                     enable_ip6=False):
        """ Enable/disable IP reassembly """
        return self.api(self.papi.ip_reassembly_enable_disable,
                        {'sw_if_index': sw_if_index,
                         'enable_ip4': 1 if enable_ip4 else 0,
                         'enable_ip6': 1 if enable_ip6 else 0,
                         })

    def gbp_endpoint_add(self, sw_if_index, ips, mac, epg, flags,
                         tun_src, tun_dst):
        """ GBP endpoint Add """
        return self.api(self.papi.gbp_endpoint_add,
                        {'endpoint': {
                            'sw_if_index': sw_if_index,
                            'ips': ips,
                            'n_ips': len(ips),
                            'mac': mac,
                            'epg_id': epg,
                            'flags': flags,
                            'tun': {
                                'src': tun_src,
                                'dst': tun_dst,
                            }}})

    def gbp_endpoint_del(self, handle):
        """ GBP endpoint Del """
        return self.api(self.papi.gbp_endpoint_del,
                        {'handle': handle})

    def gbp_endpoint_dump(self):
        """ GBP endpoint Dump """
        return self.api(self.papi.gbp_endpoint_dump,
                        {'_no_type_conversion': True})

    def gbp_endpoint_group_add(self, epg, sclass, bd,
                               rd, uplink_sw_if_index):
        """ GBP endpoint group Add """
        return self.api(self.papi.gbp_endpoint_group_add,
                        {'epg':
                         {
                             'uplink_sw_if_index': uplink_sw_if_index,
                             'bd_id': bd,
                             'rd_id': rd,
                             'epg_id': epg,
                             'sclass': sclass
                         }})

    def gbp_endpoint_group_del(self, epg):
        """ GBP endpoint group Del """
        return self.api(self.papi.gbp_endpoint_group_del,
                        {'epg_id': epg})

    def gbp_endpoint_group_dump(self):
        """ GBP endpoint group Dump """
        return self.api(self.papi.gbp_endpoint_group_dump, {})

    def gbp_bridge_domain_add(self, bd_id, flags,
                              bvi_sw_if_index,
                              uu_fwd_sw_if_index,
                              bm_flood_sw_if_index):
        """ GBP bridge-domain Add """
        return self.api(self.papi.gbp_bridge_domain_add,
                        {'bd':
                         {
                             'flags': flags,
                             'bvi_sw_if_index': bvi_sw_if_index,
                             'uu_fwd_sw_if_index': uu_fwd_sw_if_index,
                             'bm_flood_sw_if_index': bm_flood_sw_if_index,
                             'bd_id': bd_id
                         }})

    def gbp_bridge_domain_del(self, bd_id):
        """ GBP bridge-domain Del """
        return self.api(self.papi.gbp_bridge_domain_del,
                        {'bd_id': bd_id})

    def gbp_bridge_domain_dump(self):
        """ GBP Bridge Domain Dump """
        return self.api(self.papi.gbp_bridge_domain_dump, {})

    def gbp_route_domain_add(self, rd_id,
                             ip4_table_id,
                             ip6_table_id,
                             ip4_uu_sw_if_index,
                             ip6_uu_sw_if_index):
        """ GBP route-domain Add """
        return self.api(self.papi.gbp_route_domain_add,
                        {'rd':
                         {
                             'ip4_table_id': ip4_table_id,
                             'ip6_table_id': ip6_table_id,
                             'ip4_uu_sw_if_index': ip4_uu_sw_if_index,
                             'ip6_uu_sw_if_index': ip6_uu_sw_if_index,
                             'rd_id': rd_id
                         }})

    def gbp_route_domain_del(self, rd_id):
        """ GBP route-domain Del """
        return self.api(self.papi.gbp_route_domain_del,
                        {'rd_id': rd_id})

    def gbp_route_domain_dump(self):
        """ GBP Route Domain Dump """
        return self.api(self.papi.gbp_route_domain_dump, {})

    def gbp_recirc_add_del(self, is_add, sw_if_index, epg, is_ext):
        """ GBP recirc Add/Del """
        return self.api(self.papi.gbp_recirc_add_del,
                        {'is_add': is_add,
                         'recirc': {
                             'is_ext': is_ext,
                             'sw_if_index': sw_if_index,
                             'epg_id': epg}})

    def gbp_recirc_dump(self):
        """ GBP recirc Dump """
        return self.api(self.papi.gbp_recirc_dump, {})

    def gbp_ext_itf_add_del(self, is_add, sw_if_index, bd_id, rd_id):
        """ GBP recirc Add/Del """
        return self.api(self.papi.gbp_ext_itf_add_del,
                        {'is_add': is_add,
                         'ext_itf': {
                             'sw_if_index': sw_if_index,
                             'bd_id': bd_id,
                             'rd_id': rd_id}})

    def gbp_ext_itf_dump(self):
        """ GBP recirc Dump """
        return self.api(self.papi.gbp_ext_itf_dump, {})

    def gbp_subnet_add_del(self, is_add, rd_id,
                           prefix, type,
                           sw_if_index=0xffffffff,
                           epg_id=0xffff):
        """ GBP Subnet Add/Del """
        return self.api(self.papi.gbp_subnet_add_del,
                        {'is_add': is_add,
                         'subnet': {
                             'type': type,
                             'sw_if_index': sw_if_index,
                             'epg_id': epg_id,
                             'prefix': prefix,
                             'rd_id': rd_id}})

    def gbp_subnet_dump(self):
        """ GBP Subnet Dump """
        return self.api(self.papi.gbp_subnet_dump,
                        {'_no_type_conversion': True})

    def gbp_contract_add_del(self, is_add, src_epg, dst_epg, acl_index,
                             rules, allowed_ethertypes):
        """ GBP contract Add/Del """
        return self.api(self.papi.gbp_contract_add_del,
                        {'is_add': is_add,
                         'contract': {
                             'acl_index': acl_index,
                             'src_epg': src_epg,
                             'dst_epg': dst_epg,
                             'n_rules': len(rules),
                             'rules': rules,
                             'n_ether_types': len(allowed_ethertypes),
                             'allowed_ethertypes': allowed_ethertypes}})

    def gbp_contract_dump(self):
        """ GBP contract Dump """
        return self.api(self.papi.gbp_contract_dump, {})

    def gbp_endpoint_learn_set_inactive_threshold(self, threshold):
        """ GBP set inactive threshold """
        return self.api(self.papi.gbp_endpoint_learn_set_inactive_threshold,
                        {'threshold': threshold})

    def gbp_vxlan_tunnel_add(self, vni, bd_rd_id, mode):
        """ GBP VXLAN tunnel add """
        return self.api(self.papi.gbp_vxlan_tunnel_add,
                        {
                            'tunnel': {
                                'vni': vni,
                                'mode': mode,
                                'bd_rd_id': bd_rd_id
                            }
                        })

    def gbp_vxlan_tunnel_del(self, vni):
        """ GBP VXLAN tunnel del """
        return self.api(self.papi.gbp_vxlan_tunnel_del,
                        {
                            'vni': vni,
                        })

    def gbp_vxlan_tunnel_dump(self):
        """ GBP VXLAN tunnel add/del """
        return self.api(self.papi.gbp_vxlan_tunnel_dump, {})

    def ipip_6rd_add_tunnel(self, ip6_table_id, ip6_prefix, ip6_prefix_len,
                            ip4_table_id, ip4_prefix, ip4_prefix_len, ip4_src,
                            security_check):
        """ 6RD tunnel Add """
        return self.api(self.papi.ipip_6rd_add_tunnel,
                        {'ip4_table_id': ip4_table_id,
                         'ip6_table_id': ip6_table_id,
                         'ip6_prefix': ip6_prefix,
                         'ip6_prefix_len': ip6_prefix_len,
                         'ip4_prefix': ip4_prefix,
                         'ip4_prefix_len': ip4_prefix_len,
                         'ip4_src': ip4_src,
                         'security_check': security_check})

    def ipip_6rd_del_tunnel(self, sw_if_index):
        """ 6RD tunnel Delete """
        return self.api(self.papi.ipip_6rd_del_tunnel,
                        {'sw_if_index': sw_if_index})

    def ipip_add_tunnel(self, src_address, dst_address, is_ipv6=1,
                        instance=0xFFFFFFFF, table_id=0, tc_tos=0):
        """ IPIP tunnel Add/Del """
        return self.api(self.papi.ipip_add_tunnel,
                        {'is_ipv6': is_ipv6,
                         'instance': instance,
                         'src_address': src_address,
                         'dst_address': dst_address,
                         'table_id': table_id,
                         'tc_tos': tc_tos})

    def ipip_del_tunnel(self, sw_if_index):
        """ IPIP tunnel Delete """
        return self.api(self.papi.ipip_del_tunnel,
                        {'sw_if_index': sw_if_index})

    def qos_egress_map_update(self, id, outputs):
        """ QOS egress map update """
        return self.api(self.papi.qos_egress_map_update,
                        {'map_id': id,
                         'rows': outputs})

    def qos_egress_map_delete(self, id):
        """ QOS egress map delete """
        return self.api(self.papi.qos_egress_map_delete,
                        {'map_id': id})

    def qos_mark_enable_disable(self, sw_if_index,
                                output_source,
                                map_id,
                                enable):
        """ QOS Mark Enable/Disable """
        return self.api(self.papi.qos_mark_enable_disable,
                        {'map_id': map_id,
                         'sw_if_index': sw_if_index,
                         'output_source': output_source,
                         'enable': enable})

    def qos_record_enable_disable(self, sw_if_index, input_source, enable):
        """ IP QoS recording Enble/Disable """
        return self.api(self.papi.qos_record_enable_disable,
                        {'sw_if_index': sw_if_index,
                         'input_source': input_source,
                         'enable': enable})

    def igmp_enable_disable(self, sw_if_index, enable, host):
        """ Enable/disable IGMP on a given interface """
        return self.api(self.papi.igmp_enable_disable,
                        {'enable': enable,
                         'mode': host,
                         'sw_if_index': sw_if_index})

    def igmp_proxy_device_add_del(self, vrf_id, sw_if_index, add):
        """ Add/del IGMP proxy device """
        return self.api(self.papi.igmp_proxy_device_add_del,
                        {'vrf_id': vrf_id, 'sw_if_index': sw_if_index,
                         'add': add})

    def igmp_proxy_device_add_del_interface(self, vrf_id, sw_if_index, add):
        """ Add/del interface to/from IGMP proxy device """
        return self.api(self.papi.igmp_proxy_device_add_del_interface,
                        {'vrf_id': vrf_id, 'sw_if_index': sw_if_index,
                         'add': add})

    def igmp_listen(self, filter, sw_if_index, saddrs, gaddr):
        """ Listen for new (S,G) on specified interface

        :param enable: add/del
        :param sw_if_index: interface sw index
        :param saddr: source ip4 addr
        :param gaddr: group ip4 addr
        """
        return self.api(self.papi.igmp_listen,
                        {
                            'group':
                            {
                                'filter': filter,
                                'sw_if_index': sw_if_index,
                                'n_srcs': len(saddrs),
                                'saddrs': saddrs,
                                'gaddr':  gaddr
                            }
                        })

    def igmp_dump(self, sw_if_index=None):
        """ Dump all (S,G) interface configurations """
        if sw_if_index is None:
            sw_if_index = 0xffffffff
        return self.api(self.papi.igmp_dump,
                        {'sw_if_index': sw_if_index})

    def igmp_clear_interface(self, sw_if_index):
        """ Remove all (S,G)s from specified interface
            doesn't send IGMP report!
        """
        return self.api(
            self.papi.igmp_clear_interface, {
                'sw_if_index': sw_if_index})

    def want_igmp_events(self, enable=1):
        return self.api(self.papi.want_igmp_events, {'enable': enable,
                                                     'pid': os.getpid()})

    def bond_create(
            self,
            mode,
            lb,
            use_custom_mac,
            mac_address='',
            interface_id=0xFFFFFFFF):
        """
        :param mode: mode
        :param lb: load balance
        :param use_custom_mac: use custom mac
        :param mac_address: mac address
        :param interface_id: custom interface ID
        """
        return self.api(
            self.papi.bond_create,
            {'mode': mode,
             'lb': lb,
             'use_custom_mac': use_custom_mac,
             'mac_address': mac_address,
             'id': interface_id
             })

    def bond_delete(
            self,
            sw_if_index):
        """
        :param sw_if_index: interface the operation is applied to
        """
        return self.api(self.papi.bond_delete,
                        {'sw_if_index': sw_if_index})

    def bond_enslave(
            self,
            sw_if_index,
            bond_sw_if_index,
            is_passive,
            is_long_timeout):
        """
        :param sw_if_index: slave sw_if_index
        :param bond_sw_if_index: bond sw_if_index
        :param is_passive: is passive lacp speaker
        :param is_long_time: 90 seconds timeout instead of 3 seconds timeout
        """
        return self.api(
            self.papi.bond_enslave,
            {'sw_if_index': sw_if_index,
             'bond_sw_if_index': bond_sw_if_index,
             'is_passive': is_passive,
             'is_long_timeout': is_long_timeout
             })

    def bond_detach_slave(
            self,
            sw_if_index):
        """
        :param sw_if_index: slave interface the operation is applied to
        """
        return self.api(self.papi.bond_detach_slave,
                        {'sw_if_index': sw_if_index})

    def sw_interface_slave_dump(
            self,
            sw_if_index):
        """
        :param sw_if_index: bond sw_if_index
        """
        return self.api(self.papi.sw_interface_slave_dump,
                        {'sw_if_index': sw_if_index})

    def sw_interface_bond_dump(
            self):
        """

        """
        return self.api(self.papi.sw_interface_bond_dump,
                        {})

    def create_vhost_user_if(
            self,
            is_server,
            sock_filename,
            renumber,
            disable_mrg_rxbuf,
            disable_indirect_desc,
            custom_dev_instance,
            use_custom_mac,
            mac_address,
            tag=''):
        """
        :param is_server: is server
        :param sock_filename: socket name
        :param renumber: renumber
        :param disable_mrg_rxbuf: disable mergable rx buffers
        :param disable_indirect_desc: disable indirect descriptors
        :param custom_dev_instance: custom dev instance
        :param use_custom_mac: use custom mac
        :param mac_address: mac address
        :param tag: tag (default '')
        """
        return self.api(
            self.papi.create_vhost_user_if,
            {'is_server': is_server,
             'sock_filename': sock_filename,
             'renumber': renumber,
             'disable_mrg_rxbuf': disable_mrg_rxbuf,
             'disable_indirect_desc': disable_indirect_desc,
             'custom_dev_instance': custom_dev_instance,
             'use_custom_mac': use_custom_mac,
             'mac_address': mac_address,
             'tag': tag
             })

    def delete_vhost_user_if(
            self,
            sw_if_index):
        """
        :param sw_if_index: interface the operation is applied to
        """
        return self.api(self.papi.delete_vhost_user_if,
                        {'sw_if_index': sw_if_index, })

    def sw_interface_vhost_user_dump(
            self):
        """

        """
        return self.api(self.papi.sw_interface_vhost_user_dump,
                        {})

    def abf_policy_add_del(self, is_add, policy):
        return self.api(
            self.papi.abf_policy_add_del,
            {'is_add': is_add,
             'policy': policy})

    def abf_itf_attach_add_del(self, is_add, attach):
        return self.api(
            self.papi.abf_itf_attach_add_del,
            {'is_add': is_add,
             'attach': attach})

    def abf_policy_dump(self):
        return self.api(
            self.papi.abf_policy_dump, {})

    def abf_itf_attach_dump(self):
        return self.api(
            self.papi.abf_itf_attach_dump, {})

    def pipe_create(self, is_specified, user_instance):
        return self.api(self.papi.pipe_create,
                        {'is_specified': is_specified,
                         'user_instance': user_instance})

    def pipe_delete(self, parent_sw_if_index):
        return self.api(self.papi.pipe_delete,
                        {'parent_sw_if_index': parent_sw_if_index})

    def pipe_dump(self):
        return self.api(self.papi.pipe_dump, {})

    def memif_create(
            self,
            role,
            mode,
            rx_queues=None,
            tx_queues=None,
            _id=None,
            socket_id=None,
            secret=None,
            ring_size=None,
            buffer_size=None,
            hw_addr=None):
        return self.api(self.papi.memif_create,
                        {'role': role,
                         'mode': mode,
                         'rx_queues': rx_queues,
                         'tx_queues': tx_queues,
                         'id': _id,
                         'socket_id': socket_id,
                         'secret': secret,
                         'ring_size': ring_size,
                         'buffer_size': buffer_size,
                         'hw_addr': hw_addr})

    def memif_delete(self, sw_if_index):
        return self.api(self.papi.memif_delete, {'sw_if_index': sw_if_index})

    def memif_dump(self):
        return self.api(self.papi.memif_dump, {})

    def memif_socket_filename_add_del(
            self, is_add, socket_id, socket_filename):
        return self.api(
            self.papi.memif_socket_filename_add_del,
            {'is_add': is_add,
             'socket_id': socket_id,
             'socket_filename': socket_filename})

    def memif_socket_filename_dump(self):
        return self.api(self.papi.memif_socket_filename_dump, {})

    def svs_table_add_del(self, af, table_id, is_add=1):
        return self.api(self.papi.svs_table_add_del,
                        {
                            'table_id': table_id,
                            'is_add': is_add,
                            'af': af,
                        })

    def svs_route_add_del(self, table_id, prefix, src_table_id, is_add=1):
        return self.api(self.papi.svs_route_add_del,
                        {
                            'table_id': table_id,
                            'source_table_id': src_table_id,
                            'prefix': prefix,
                            'is_add': is_add,
                        })

    def svs_enable_disable(self, af, table_id, sw_if_index, is_enable=1):
        return self.api(self.papi.svs_enable_disable,
                        {
                            'af': af,
                            'table_id': table_id,
                            'sw_if_index': sw_if_index,
                            'is_enable': is_enable,
                        })

    def svs_dump(self):
        return self.api(self.papi.svs_dump, {})

    def syslog_set_sender(
            self,
            collector,
            src,
            collector_port=514,
            vrf_id=0,
            max_msg_size=480):
        """Set syslog sender configuration

        :param collector: colector IP address
        :param src: source IP address
        :param collector_port: collector UDP port (Default value = 514)
        :param vrf_id: VRF id (Default value = 0)
        :param max_msg_size: maximum message length (Default value = 480)
        """
        return self.api(self.papi.syslog_set_sender,
                        {'collector_address': collector,
                         'src_address': src,
                         'collector_port': collector_port,
                         'vrf_id': vrf_id,
                         'max_msg_size': max_msg_size})

    def syslog_get_sender(self):
        """Return syslog sender configuration"""
        return self.api(self.papi.syslog_get_sender, {})

    def syslog_set_filter(self, severity):
        """Set syslog filter parameters

        :param severity: severity filter (specified severity and greater match)
        """
        return self.api(self.papi.syslog_set_filter, {'severity': severity})

    def syslog_get_filter(self):
        """Return syslog filter parameters"""
        return self.api(self.papi.syslog_get_filter, {})