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# Copyright (c) 2016 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.

AUTOMAKE_OPTIONS = foreign
AM_CFLAGS = -Wall 

bin_PROGRAMS = c2cpel cpelatency cpeldump cpelinreg cpelstate

lib_LTLIBRARIES = libcperf.la

libcperf_la_SOURCES = delsvec.c linreg.c props.c cpel_util.c

TOOL_LIBS = libcperf.la -lvppinfra -lm

c2cpel_SOURCE = c2cpel.c
c2cpel_LDADD = $(TOOL_LIBS)

cpelatency_SOURCE = cpelatency.c
cpelatency_LDADD = $(TOOL_LIBS)

cpeldump_SOURCE = cpeldump.c
cpeldump_LDADD = $(TOOL_LIBS)

cpelinreg_SOURCE = cpelinreg.c
cpelinreg_LDADD = $(TOOL_LIBS)

cpelstate_SOURCE = cpelstate.c
cpelstate_LDADD = $(TOOL_LIBS)
03' href='#n403'>403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 
/*
 * teib.h: Tunnel Endpoint Information Base
 *
 * Copyright (c) 2020 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.
 */


#include <vnet/teib/teib.h>
#include <vnet/fib/fib_table.h>
#include <vnet/adj/adj_midchain.h>
#include <vnet/ip/ip6_ll_table.h>

typedef struct teib_key_t_
{
  ip_address_t tk_peer;
  u8 __pad[3];
  u32 tk_sw_if_index;
} __clib_packed teib_key_t;

STATIC_ASSERT_SIZEOF (teib_key_t, 24);

struct teib_entry_t_
{
  teib_key_t *te_key;
  fib_prefix_t te_nh;
  u32 te_nh_fib_index;
};

typedef struct teib_db_t_
{
  u32 td_n_entries[N_AF];
  uword *td_db;
} teib_db_t;

static teib_db_t teib_db;
static teib_entry_t *teib_pool;
static teib_vft_t *teib_vfts;
static vlib_log_class_t teib_logger;

#define TEIB_NOTIFY(_te, _fn) {                  \
  teib_vft_t *_vft;                              \
  vec_foreach(_vft, teib_vfts) {                 \
    if (_vft->_fn) {                             \
      _vft->_fn(_te);                            \
    }                                            \
  }                                              \
}

#define TEIB_DBG(...)                           \
    vlib_log_debug (teib_logger, __VA_ARGS__);

#define TEIB_INFO(...)                          \
    vlib_log_notice (teib_logger, __VA_ARGS__);

#define TEIB_TE_DBG(_te, _fmt, _args...)                      \
  vlib_log_debug (teib_logger, "[%U]: " _fmt, format_teib_entry, _te - teib_pool, ##_args)
#define TEIB_TE_INFO(_te, _fmt, _args...)                      \
  vlib_log_notice (teib_logger, "[%U]: " _fmt, format_teib_entry, _te - teib_pool, ##_args)

u32
teib_entry_get_sw_if_index (const teib_entry_t * te)
{
  return (te->te_key->tk_sw_if_index);
}

static ip_address_family_t
teib_entry_get_af (const teib_entry_t * te)
{
  return (ip_addr_version (&te->te_key->tk_peer));
}

u32
teib_entry_get_fib_index (const teib_entry_t * te)
{
  return (te->te_nh_fib_index);
}

const ip_address_t *
teib_entry_get_peer (const teib_entry_t * te)
{
  return (&te->te_key->tk_peer);
}

const fib_prefix_t *
teib_entry_get_nh (const teib_entry_t * te)
{
  return (&te->te_nh);
}

void
teib_entry_adj_stack (const teib_entry_t * te, adj_index_t ai)
{
  adj_midchain_delegate_stack (ai, te->te_nh_fib_index, &te->te_nh);
}

teib_entry_t *
teib_entry_get (index_t tei)
{
  return pool_elt_at_index (teib_pool, tei);
}

teib_entry_t *
teib_entry_find (u32 sw_if_index, const ip_address_t * peer)
{
  teib_key_t nk = {
    .tk_peer = *peer,
    .tk_sw_if_index = sw_if_index,
  };
  uword *p;

  p = hash_get_mem (teib_db.td_db, &nk);

  if (NULL != p)
    return teib_entry_get (p[0]);

  return (NULL);
}

teib_entry_t *
teib_entry_find_46 (u32 sw_if_index,
		    fib_protocol_t fproto, const ip46_address_t * peer)
{
  ip_address_t ip;

  ip_address_from_46 (peer, fproto, &ip);

  return (teib_entry_find (sw_if_index, &ip));
}

static void
teib_adj_fib_add (const ip_address_t *ip, u32 sw_if_index, u32 peer_fib_index)
{
  if (AF_IP6 == ip_addr_version (ip) &&
      ip6_address_is_link_local_unicast (&ip_addr_v6 (ip)))
    {
      ip6_ll_prefix_t pfx = {
	.ilp_addr = ip_addr_v6 (ip),
	.ilp_sw_if_index = sw_if_index,
      };
      ip6_ll_table_entry_update (&pfx, FIB_ROUTE_PATH_FLAG_NONE);
    }
  else
    {
      fib_prefix_t pfx;

      ip_address_to_fib_prefix (ip, &pfx);
      fib_table_entry_path_add (
	peer_fib_index, &pfx, FIB_SOURCE_ADJ, FIB_ENTRY_FLAG_ATTACHED,
	fib_proto_to_dpo (pfx.fp_proto), &pfx.fp_addr, sw_if_index, ~0, 1,
	NULL, FIB_ROUTE_PATH_FLAG_NONE);

      if (0 == teib_db.td_n_entries[ip_addr_version (ip)]++)
	fib_table_lock (peer_fib_index, pfx.fp_proto, FIB_SOURCE_ADJ);
    }
}

static void
teib_adj_fib_remove (ip_address_t *ip, u32 sw_if_index, u32 peer_fib_index)
{
  if (AF_IP6 == ip_addr_version (ip) &&
      ip6_address_is_link_local_unicast (&ip_addr_v6 (ip)))
    {
      ip6_ll_prefix_t pfx = {
	.ilp_addr = ip_addr_v6 (ip),
	.ilp_sw_if_index = sw_if_index,
      };
      ip6_ll_table_entry_delete (&pfx);
    }
  else
    {
      fib_prefix_t pfx;

      ip_address_to_fib_prefix (ip, &pfx);
      fib_table_entry_path_remove (
	peer_fib_index, &pfx, FIB_SOURCE_ADJ, fib_proto_to_dpo (pfx.fp_proto),
	&pfx.fp_addr, sw_if_index, ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);

      if (0 == --teib_db.td_n_entries[ip_addr_version (ip)])
	fib_table_unlock (peer_fib_index, pfx.fp_proto, FIB_SOURCE_ADJ);
    }
}

int
teib_entry_add (u32 sw_if_index,
		const ip_address_t * peer,
		u32 nh_table_id, const ip_address_t * nh)
{
  fib_protocol_t nh_proto;
  teib_entry_t *te;
  u32 nh_fib_index, peer_fib_index;
  index_t tei;

  nh_proto = (AF_IP4 == ip_addr_version (nh) ?
	      FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6);

  peer_fib_index = fib_table_get_index_for_sw_if_index (
    ip_address_family_to_fib_proto (peer->version), sw_if_index);
  nh_fib_index = fib_table_find (nh_proto, nh_table_id);

  if (~0 == nh_fib_index)
    {
      return (VNET_API_ERROR_NO_SUCH_FIB);
    }

  te = teib_entry_find (sw_if_index, peer);

  if (NULL == te)
    {
      teib_key_t nk = {
	.tk_peer = *peer,
	.tk_sw_if_index = sw_if_index,
      };
      teib_entry_t *te;

      pool_get_zero (teib_pool, te);

      tei = te - teib_pool;
      te->te_key = clib_mem_alloc (sizeof (*te->te_key));
      clib_memcpy (te->te_key, &nk, sizeof (*te->te_key));

      ip_address_to_fib_prefix (nh, &te->te_nh);
      te->te_nh_fib_index = nh_fib_index;

      hash_set_mem (teib_db.td_db, te->te_key, tei);

      /* we how have a /32 in the overlay, add an adj-fib */
      teib_adj_fib_add (&te->te_key->tk_peer, sw_if_index, peer_fib_index);

      TEIB_NOTIFY (te, nv_added);
      TEIB_TE_INFO (te, "created");
    }
  else
    {
      TEIB_TE_INFO (te, "exists");
      return (VNET_API_ERROR_ENTRY_ALREADY_EXISTS);
    }
  return 0;
}

int
teib_entry_del (u32 sw_if_index, const ip_address_t * peer)
{
  teib_entry_t *te;

  te = teib_entry_find (sw_if_index, peer);

  if (te != NULL)
    {
      TEIB_TE_INFO (te, "removed");

      u32 peer_fib_index;

      peer_fib_index = fib_table_get_index_for_sw_if_index (
	ip_address_family_to_fib_proto (peer->version), sw_if_index);

      teib_adj_fib_remove (&te->te_key->tk_peer, sw_if_index, peer_fib_index);

      hash_unset_mem (teib_db.td_db, te->te_key);

      TEIB_NOTIFY (te, nv_deleted);

      clib_mem_free (te->te_key);
      pool_put (teib_pool, te);
    }
  else
    {
      TEIB_INFO ("no such entry: %U, %U", format_vnet_sw_if_index_name,
		 vnet_get_main (), sw_if_index, format_ip_address, peer);
      return (VNET_API_ERROR_NO_SUCH_ENTRY);
    }
  return 0;
}

u8 *
format_teib_entry (u8 * s, va_list * args)
{
  index_t tei = va_arg (*args, index_t);
  vnet_main_t *vnm = vnet_get_main ();
  teib_entry_t *te;

  te = teib_entry_get (tei);

  s = format (s, "[%d] ", tei);
  s = format (s, "%U:", format_vnet_sw_if_index_name,
	      vnm, te->te_key->tk_sw_if_index);
  s = format (s, "%U", format_ip_address,
	      &te->te_key->tk_peer, IP46_TYPE_ANY);
  s = format (s, " via [%d]:%U",
	      fib_table_get_table_id (te->te_nh_fib_index, te->te_nh.fp_proto),
	      format_fib_prefix, &te->te_nh);

  return (s);
}

void
teib_walk (teib_walk_cb_t fn, void *ctx)
{
  index_t tei;

  /* *INDENT-OFF* */
  pool_foreach_index (tei, teib_pool)
   {
    fn(tei, ctx);
  }
  /* *INDENT-ON* */
}

void
teib_walk_itf (u32 sw_if_index, teib_walk_cb_t fn, void *ctx)
{
  index_t tei;

  /* *INDENT-OFF* */
  pool_foreach_index (tei, teib_pool)
   {
    if (sw_if_index == teib_entry_get_sw_if_index(teib_entry_get(tei)))
      fn(tei, ctx);
  }
  /* *INDENT-ON* */
}

static void
teib_walk_itf_proto (u32 sw_if_index,
		     ip_address_family_t af, teib_walk_cb_t fn, void *ctx)
{
  index_t tei;

  /* *INDENT-OFF* */
  pool_foreach_index (tei, teib_pool)
   {
    if (sw_if_index == teib_entry_get_sw_if_index(teib_entry_get(tei)) &&
        af == teib_entry_get_af(teib_entry_get(tei)))
      fn(tei, ctx);
  }
  /* *INDENT-ON* */
}

typedef struct teib_table_bind_ctx_t_
{
  u32 new_peer_fib_index;
  u32 old_peer_fib_index;
} teib_table_bind_ctx_t;

static walk_rc_t
teib_walk_table_bind (index_t tei, void *arg)
{
  teib_table_bind_ctx_t *ctx = arg;
  teib_entry_t *te;

  te = teib_entry_get (tei);

  TEIB_TE_INFO (te, "bind: %d -> %d", ctx->old_peer_fib_index,
		ctx->new_peer_fib_index);

  teib_adj_fib_remove (&te->te_key->tk_peer, te->te_key->tk_sw_if_index,
		       ctx->old_peer_fib_index);
  teib_adj_fib_add (&te->te_key->tk_peer, te->te_key->tk_sw_if_index,
		    ctx->new_peer_fib_index);

  return (WALK_CONTINUE);
}

static void
teib_table_bind_v4 (ip4_main_t * im,
		    uword opaque,
		    u32 sw_if_index, u32 new_fib_index, u32 old_fib_index)
{
  teib_table_bind_ctx_t ctx = {
    .old_peer_fib_index = old_fib_index,
    .new_peer_fib_index = new_fib_index,
  };

  teib_walk_itf_proto (sw_if_index, AF_IP4, teib_walk_table_bind, &ctx);
}

static void
teib_table_bind_v6 (ip6_main_t * im,
		    uword opaque,
		    u32 sw_if_index, u32 new_fib_index, u32 old_fib_index)
{
  teib_table_bind_ctx_t ctx = {
    .old_peer_fib_index = old_fib_index,
    .new_peer_fib_index = new_fib_index,
  };

  teib_walk_itf_proto (sw_if_index, AF_IP6, teib_walk_table_bind, &ctx);
}

void
teib_register (const teib_vft_t * vft)
{
  vec_add1 (teib_vfts, *vft);
}

static clib_error_t *
teib_init (vlib_main_t * vm)
{
  teib_db.td_db = hash_create_mem (0, sizeof (teib_key_t), sizeof (u32));

  ip4_table_bind_callback_t cb4 = {
    .function = teib_table_bind_v4,
  };
  vec_add1 (ip4_main.table_bind_callbacks, cb4);

  ip6_table_bind_callback_t cb6 = {
    .function = teib_table_bind_v6,
  };
  vec_add1 (ip6_main.table_bind_callbacks, cb6);

  teib_logger = vlib_log_register_class ("teib", "teib");

  return (NULL);
}

VLIB_INIT_FUNCTION (teib_init);

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