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/*
* interface.c: mpls interfaces
*
* Copyright (c) 2012 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/vnet.h>
#include <vnet/pg/pg.h>
#include <vnet/mpls/mpls.h>
#include <vnet/fib/mpls_fib.h>
#include <vnet/fib/ip4_fib.h>
#include <vnet/adj/adj_midchain.h>
#include <vnet/dpo/classify_dpo.h>
u8
mpls_sw_interface_is_enabled (u32 sw_if_index)
{
mpls_main_t * mm = &mpls_main;
if (vec_len(mm->mpls_enabled_by_sw_if_index) <= sw_if_index)
return (0);
return (mm->mpls_enabled_by_sw_if_index[sw_if_index]);
}
int
mpls_sw_interface_enable_disable (mpls_main_t * mm,
u32 sw_if_index,
u8 is_enable,
u8 is_api)
{
fib_node_index_t lfib_index;
vnet_main_t *vnm = vnet_get_main ();
vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
vec_validate_init_empty (mm->mpls_enabled_by_sw_if_index, sw_if_index, 0);
lfib_index = fib_table_find(FIB_PROTOCOL_MPLS,
MPLS_FIB_DEFAULT_TABLE_ID);
if (~0 == lfib_index)
return VNET_API_ERROR_NO_SUCH_FIB;
/*
* enable/disable only on the 1<->0 transition
*/
if (is_enable)
{
if (1 != ++mm->mpls_enabled_by_sw_if_index[sw_if_index])
return (0);
fib_table_lock(lfib_index, FIB_PROTOCOL_MPLS,
(is_api? FIB_SOURCE_API: FIB_SOURCE_CLI));
vec_validate(mm->fib_index_by_sw_if_index, sw_if_index);
mm->fib_index_by_sw_if_index[sw_if_index] = lfib_index;
}
else
{
ASSERT(mm->mpls_enabled_by_sw_if_index[sw_if_index] > 0);
if (0 != --mm->mpls_enabled_by_sw_if_index[sw_if_index])
return (0);
fib_table_unlock(mm->fib_index_by_sw_if_index[sw_if_index],
FIB_PROTOCOL_MPLS,
(is_api? FIB_SOURCE_API: FIB_SOURCE_CLI));
}
vnet_feature_enable_disable ("mpls-input", "mpls-not-enabled",
sw_if_index, !is_enable, 0, 0);
if (is_enable)
hi->l3_if_count++;
else if (hi->l3_if_count)
hi->l3_if_count--;
return (0);
}
static clib_error_t *
mpls_interface_enable_disable (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
vnet_main_t * vnm = vnet_get_main();
clib_error_t * error = 0;
u32 sw_if_index, enable;
int rv;
sw_if_index = ~0;
if (! unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
{
error = clib_error_return (0, "unknown interface `%U'",
format_unformat_error, input);
goto done;
}
if (unformat (input, "enable"))
enable = 1;
else if (unformat (input, "disable"))
enable = 0;
else
{
error = clib_error_return (0, "expected 'enable' or 'disable'",
format_unformat_error, input);
goto done;
}
rv = mpls_sw_interface_enable_disable(&mpls_main, sw_if_index, enable, 0);
if (VNET_API_ERROR_NO_SUCH_FIB == rv)
error = clib_error_return (0, "default MPLS table must be created first");
done:
return error;
}
/*?
* This command enables an interface to accpet MPLS packets
*
* @cliexpar
* @cliexstart{set interface mpls}
* set interface mpls GigEthernet0/8/0 enable
* @cliexend
?*/
VLIB_CLI_COMMAND (set_interface_ip_table_command, static) = {
.path = "set interface mpls",
.function = mpls_interface_enable_disable,
.short_help = "Enable/Disable an interface for MPLS forwarding",
};
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