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/*
* Copyright (c) 2018 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 <plugins/gbp/gbp.h>
#include <plugins/gbp/gbp_fwd_dpo.h>
#include <plugins/gbp/gbp_policy_dpo.h>
#include <vnet/fib/fib_table.h>
#include <vnet/dpo/load_balance.h>
static int
gbp_internal_subnet_add (u32 fib_index, const fib_prefix_t * pfx)
{
dpo_id_t gfd = DPO_INVALID;
gbp_fwd_dpo_add_or_lock (fib_proto_to_dpo (pfx->fp_proto), &gfd);
fib_table_entry_special_dpo_update (fib_index,
pfx,
FIB_SOURCE_PLUGIN_HI,
FIB_ENTRY_FLAG_EXCLUSIVE, &gfd);
dpo_reset (&gfd);
return (0);
}
static int
gbp_external_subnet_add (u32 fib_index,
const fib_prefix_t * pfx,
u32 sw_if_index, epg_id_t epg)
{
dpo_id_t gpd = DPO_INVALID;
gbp_policy_dpo_add_or_lock (fib_proto_to_dpo (pfx->fp_proto),
epg, sw_if_index, &gpd);
fib_table_entry_special_dpo_update (fib_index,
pfx,
FIB_SOURCE_PLUGIN_HI,
(FIB_ENTRY_FLAG_EXCLUSIVE |
FIB_ENTRY_FLAG_LOOSE_URPF_EXEMPT),
&gpd);
dpo_reset (&gpd);
return (0);
}
static int
gbp_subnet_del (u32 fib_index, const fib_prefix_t * pfx)
{
fib_table_entry_delete (fib_index, pfx, FIB_SOURCE_PLUGIN_HI);
return (0);
}
int
gbp_subnet_add_del (u32 table_id,
const fib_prefix_t * pfx,
u32 sw_if_index, epg_id_t epg, u8 is_add, u8 is_internal)
{
u32 fib_index;
fib_index = fib_table_find (pfx->fp_proto, table_id);
if (~0 == fib_index)
return (VNET_API_ERROR_NO_SUCH_FIB);
if (is_internal && is_add)
return (gbp_internal_subnet_add (fib_index, pfx));
else if (!is_internal && is_add)
return (gbp_external_subnet_add (fib_index, pfx, sw_if_index, epg));
return (gbp_subnet_del (fib_index, pfx));
}
typedef struct gbp_subnet_fib_table_walk_ctx_t_
{
gbp_subnet_cb_t cb;
void *ctx;
} gbp_subnet_fib_table_walk_ctx_t;
static fib_table_walk_rc_t
gbp_subnet_fib_table_walk (fib_node_index_t fei, void *arg)
{
gbp_subnet_fib_table_walk_ctx_t *ctx = arg;
const fib_prefix_t *pfx;
const dpo_id_t *dpo;
u32 table_id;
pfx = fib_entry_get_prefix (fei);
table_id = fib_table_get_table_id (fib_entry_get_fib_index (fei),
pfx->fp_proto);
dpo = fib_entry_contribute_ip_forwarding (fei);
if (DPO_LOAD_BALANCE == dpo->dpoi_type)
{
dpo = load_balance_get_bucket (dpo->dpoi_index, 0);
if (dpo->dpoi_type == gbp_policy_dpo_get_type ())
{
gbp_policy_dpo_t *gpd;
gpd = gbp_policy_dpo_get (dpo->dpoi_index);
/* *INDENT-OFF* */
ctx->cb (table_id, pfx,
gpd->gpd_sw_if_index,
gpd->gpd_epg,
0, // is_internal
ctx->ctx);
/* *INDENT-ON* */
}
else if (dpo->dpoi_type == gbp_fwd_dpo_get_type ())
{
/* *INDENT-OFF* */
ctx->cb (table_id, pfx,
~0, // sw_if_index
~0, // epg
1, // is_internal
ctx->ctx);
/* *INDENT-ON* */
}
}
return (FIB_TABLE_WALK_CONTINUE);
}
void
gbp_subnet_walk (gbp_subnet_cb_t cb, void *ctx)
{
fib_table_t *fib_table;
gbp_subnet_fib_table_walk_ctx_t wctx = {
.cb = cb,
.ctx = ctx,
};
/* *INDENT-OFF* */
pool_foreach (fib_table, ip4_main.fibs,
({
fib_table_walk(fib_table->ft_index,
FIB_PROTOCOL_IP4,
gbp_subnet_fib_table_walk,
&wctx);
}));
pool_foreach (fib_table, ip6_main.fibs,
({
fib_table_walk(fib_table->ft_index,
FIB_PROTOCOL_IP6,
gbp_subnet_fib_table_walk,
&wctx);
}));
/* *INDENT-ON* */
}
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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