/* * teib.h: next-hop resolution * * 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. */ #include <vnet/teib/teib.h> #include <vnet/fib/fib_table.h> #include <vnet/adj/adj_midchain.h> typedef struct teib_key_t_ { ip46_address_t tk_peer; u32 tk_sw_if_index; } teib_key_t; struct teib_entry_t_ { teib_key_t *te_key; fib_prefix_t te_nh; u32 te_fib_index; }; static uword *teib_db; static teib_entry_t *teib_pool; static teib_vft_t *teib_vfts; #define TEIB_NOTIFY(_te, _fn) { \ teib_vft_t *_vft; \ vec_foreach(_vft, teib_vfts) { \ if (_vft->_fn) { \ _vft->_fn(_te); \ } \ } \ } u32 teib_entry_get_sw_if_index (const teib_entry_t * te) { return (te->te_key->tk_sw_if_index); } u32 teib_entry_get_fib_index (const teib_entry_t * te) { return (te->te_fib_index); } const ip46_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_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 ip46_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, &nk); if (NULL != p) return teib_entry_get (p[0]); return (NULL); } int teib_entry_add (u32 sw_if_index, const ip46_address_t * peer, u32 nh_table_id, const ip46_address_t * nh) { fib_protocol_t fproto; teib_entry_t *te; u32 fib_index; index_t tei; fproto = (ip46_address_is_ip4 (nh) ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6); fib_index = fib_table_find (fproto, nh_table_id); if (~0 == 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)); ip46_address_copy (&te->te_nh.fp_addr, nh); te->te_nh.fp_proto = fproto; te->te_nh.fp_len = (te->te_nh.fp_proto == FIB_PROTOCOL_IP4 ? 32 : 128); te->te_fib_index = fib_index; hash_set_mem (teib_db, te->te_key, tei); TEIB_NOTIFY (te, nv_added); } else return (VNET_API_ERROR_ENTRY_ALREADY_EXISTS); return 0; } int teib_entry_del (u32 sw_if_index, const ip46_address_t * peer) { teib_entry_t *te; te = teib_entry_find (sw_if_index, peer); if (te != NULL) { hash_unset_mem (teib_db, te->te_key); TEIB_NOTIFY (te, nv_deleted); clib_mem_free (te->te_key); pool_put (teib_pool, te); } else return (VNET_API_ERROR_ENTRY_ALREADY_EXISTS); 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_ip46_address, &te->te_key->tk_peer, IP46_TYPE_ANY); s = format (s, " via [%d]:%U", fib_table_get_table_id (te->te_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* */ } 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 = hash_create_mem (0, sizeof (teib_key_t), sizeof (u32)); return (NULL); } VLIB_INIT_FUNCTION (teib_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */