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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.
*/
#include <urpf/urpf.h>
#include <vnet/plugin/plugin.h>
#include <vnet/ip/ip_types_api.h>
#include <vpp/app/version.h>
#include <vlibapi/api.h>
#include <vlibmemory/api.h>
/* define message IDs */
#include <vnet/format_fns.h>
#include <urpf/urpf.api_enum.h>
#include <urpf/urpf.api_types.h>
#include <vnet/fib/fib_table.h>
#include <vnet/ip/ip_types.h>
/**
* Base message ID fot the plugin
*/
static u32 urpf_base_msg_id;
#define REPLY_MSG_ID_BASE urpf_base_msg_id
#include <vlibapi/api_helper_macros.h>
static int
urpf_mode_decode (vl_api_urpf_mode_t in, urpf_mode_t * out)
{
if (0)
;
#define _(a,b) \
else if (URPF_API_MODE_##a == in) \
{ \
*out = URPF_MODE_##a; \
return (0); \
}
foreach_urpf_mode
#undef _
return (VNET_API_ERROR_INVALID_VALUE);
}
static void
vl_api_urpf_update_t_handler (vl_api_urpf_update_t * mp)
{
vl_api_urpf_update_reply_t *rmp;
ip_address_family_t af;
urpf_mode_t mode;
int rv = 0;
VALIDATE_SW_IF_INDEX (mp);
rv = urpf_mode_decode (mp->mode, &mode);
if (rv)
goto done;
rv = ip_address_family_decode (mp->af, &af);
if (rv)
goto done;
rv = urpf_update (mode, htonl (mp->sw_if_index), af,
(mp->is_input ? VLIB_RX : VLIB_TX), 0);
if (rv)
goto done;
BAD_SW_IF_INDEX_LABEL;
done:
REPLY_MACRO (VL_API_URPF_UPDATE_REPLY);
}
static void
vl_api_urpf_update_v2_t_handler (vl_api_urpf_update_v2_t *mp)
{
vl_api_urpf_update_reply_t *rmp;
ip_address_family_t af;
urpf_mode_t mode;
int rv = 0;
VALIDATE_SW_IF_INDEX (mp);
rv = urpf_mode_decode (mp->mode, &mode);
if (rv)
goto done;
rv = ip_address_family_decode (mp->af, &af);
if (rv)
goto done;
rv = urpf_update (mode, htonl (mp->sw_if_index), af,
(mp->is_input ? VLIB_RX : VLIB_TX), ntohl (mp->table_id));
if (rv)
goto done;
BAD_SW_IF_INDEX_LABEL;
done:
REPLY_MACRO (VL_API_URPF_UPDATE_V2_REPLY);
}
static void
send_urpf_interface_details (vpe_api_main_t *am, vl_api_registration_t *reg,
u32 context, const u32 sw_if_index,
const urpf_data_t *ud,
const ip_address_family_t af,
const vlib_dir_t dir)
{
vl_api_urpf_interface_details_t *mp;
mp = vl_msg_api_alloc_zero (sizeof (*mp));
mp->_vl_msg_id = ntohs (REPLY_MSG_ID_BASE + VL_API_URPF_INTERFACE_DETAILS);
mp->context = context;
mp->sw_if_index = htonl (sw_if_index);
mp->table_id = htonl (fib_table_get_table_id (
ud->fib_index, (af == AF_IP4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6)));
mp->af = (vl_api_address_family_t) af;
mp->mode = (vl_api_urpf_mode_t) ud->mode;
mp->is_input = (dir == VLIB_RX);
vl_api_send_msg (reg, (u8 *) mp);
}
static void
send_urpf_interface (vpe_api_main_t *am, vl_api_registration_t *reg,
u32 context, const u32 sw_if_index)
{
urpf_data_t *ud;
vlib_dir_t dir;
ip_address_family_t af;
FOR_EACH_IP_ADDRESS_FAMILY (af)
FOREACH_VLIB_DIR (dir)
if (sw_if_index < vec_len (urpf_cfgs[af][dir]))
{
ud = &urpf_cfgs[af][dir][sw_if_index];
if (ud->mode || ud->fib_index_is_custom)
send_urpf_interface_details (am, reg, context, sw_if_index, ud, af,
dir);
}
}
static void
vl_api_urpf_interface_dump_t_handler (vl_api_urpf_interface_dump_t *mp)
{
vpe_api_main_t *am = &vpe_api_main;
vl_api_registration_t *reg;
vnet_interface_main_t *im = &vnet_main.interface_main;
vnet_sw_interface_t *si;
u32 sw_if_index = ~0;
int __attribute__ ((unused)) rv = 0;
reg = vl_api_client_index_to_registration (mp->client_index);
if (!reg)
return;
sw_if_index = ntohl (mp->sw_if_index);
if (sw_if_index == ~0)
{
pool_foreach (si, im->sw_interfaces)
{
send_urpf_interface (am, reg, mp->context, si->sw_if_index);
}
return;
}
VALIDATE_SW_IF_INDEX (mp);
send_urpf_interface (am, reg, mp->context, sw_if_index);
BAD_SW_IF_INDEX_LABEL;
}
#include <urpf/urpf.api.c>
static clib_error_t *
urpf_api_init (vlib_main_t * vm)
{
/* Ask for a correctly-sized block of API message decode slots */
urpf_base_msg_id = setup_message_id_table ();
return 0;
}
VLIB_INIT_FUNCTION (urpf_api_init);
VLIB_PLUGIN_REGISTER () = {
.version = VPP_BUILD_VER,
.description = "Unicast Reverse Path Forwarding (uRPF)",
};
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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