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/*
* l2e.c : Extract L3 packets from the L2 input and feed
* them into the L3 path.
*
* Copyright (c) 2013 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/l2e/l2e.h>
#include <vnet/l2/l2_input.h>
#include <vnet/l2/feat_bitmap.h>
#include <vnet/ip/ip.h>
l2_emulation_main_t l2_emulation_main;
/**
* A zero'd out struct we can use in the vec_validate
*/
static const l2_emulation_t ezero = { };
__clib_export void
l2_emulation_enable (u32 sw_if_index)
{
l2_emulation_main_t *em = &l2_emulation_main;
vec_validate_init_empty (em->l2_emulations, sw_if_index, ezero);
l2_emulation_t *l23e = &em->l2_emulations[sw_if_index];
l23e->enabled = 1;
/*
* L3 enable the interface - using IP unnumbered from the control
* plane may not be possible since there may be no BVI interface
* to which to unnumber
*/
ip4_sw_interface_enable_disable (sw_if_index, 1);
ip6_sw_interface_enable_disable (sw_if_index, 1);
l2input_intf_bitmap_enable (sw_if_index, L2INPUT_FEAT_L2_EMULATION, 1);
}
__clib_export void
l2_emulation_disable (u32 sw_if_index)
{
l2_emulation_main_t *em = &l2_emulation_main;
if (vec_len (em->l2_emulations) >= sw_if_index)
{
l2_emulation_t *l23e = &em->l2_emulations[sw_if_index];
clib_memset (l23e, 0, sizeof (*l23e));
l2input_intf_bitmap_enable (sw_if_index, L2INPUT_FEAT_L2_EMULATION, 0);
ip4_sw_interface_enable_disable (sw_if_index, 0);
ip6_sw_interface_enable_disable (sw_if_index, 0);
}
}
static clib_error_t *
l2_emulation_interface_add_del (vnet_main_t * vnm,
u32 sw_if_index, u32 is_add)
{
l2_emulation_main_t *em = &l2_emulation_main;
if (is_add)
{
vec_validate_init_empty (em->l2_emulations, sw_if_index, ezero);
}
return (NULL);
}
VNET_SW_INTERFACE_ADD_DEL_FUNCTION (l2_emulation_interface_add_del);
static clib_error_t *
l2_emulation_cli (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
vnet_main_t *vnm = vnet_get_main ();
u32 sw_if_index = ~0;
u8 enable = 1;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "%U", unformat_vnet_sw_interface,
vnm, &sw_if_index))
;
else if (unformat (input, "enable"))
enable = 1;
else if (unformat (input, "disable"))
enable = 0;
else
break;
}
if (~0 == sw_if_index)
return clib_error_return (0, "interface must be specified");
if (enable)
l2_emulation_enable (sw_if_index);
else
l2_emulation_disable (sw_if_index);
return (NULL);
}
/*?
* Configure l2 emulation.
* When the interface is in L2 mode, configure the extraction of L3
* packets out of the L2 path and into the L3 path.
*
* @cliexpar
* @cliexstart{set interface l2 input l2-emulation <interface-name> [disable]}
* @cliexend
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (l2_emulation_cli_node, static) = {
.path = "set interface l2 l2-emulation",
.short_help =
"set interface l2 l2-emulation <interface-name> [disable|enable]\n",
.function = l2_emulation_cli,
};
/* *INDENT-ON* */
static clib_error_t *
l2_emulation_show (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
l2_emulation_main_t *em = &l2_emulation_main;
vnet_main_t *vnm = vnet_get_main ();
l2_emulation_t *l23e;
u32 sw_if_index;
vec_foreach_index (sw_if_index, em->l2_emulations)
{
l23e = &em->l2_emulations[sw_if_index];
if (l23e->enabled)
{
vlib_cli_output (vm, "%U\n",
format_vnet_sw_if_index_name, vnm, sw_if_index);
}
}
return (NULL);
}
/*?
* Show l2 emulation.
* When the interface is in L2 mode, configure the extraction of L3
* packets out of the L2 path and into the L3 path.
*
* @cliexpar
* @cliexstart{show interface l2 l2-emulation}
* @cliexend
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (l2_emulation_show_node, static) = {
.path = "show interface l2 l2-emulation",
.short_help = "show interface l2 l2-emulation\n",
.function = l2_emulation_show,
};
/* *INDENT-ON* */
static clib_error_t *
l2_emulation_init (vlib_main_t * vm)
{
l2_emulation_main_t *em = &l2_emulation_main;
vlib_node_t *node;
node = vlib_get_node_by_name (vm, (u8 *) "l2-emulation");
em->l2_emulation_node_index = node->index;
/* Initialize the feature next-node indexes */
feat_bitmap_init_next_nodes (vm,
em->l2_emulation_node_index,
L2INPUT_N_FEAT,
l2input_get_feat_names (),
em->l2_input_feat_next);
return 0;
}
VLIB_INIT_FUNCTION (l2_emulation_init);
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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