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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 <vlib/vlib.h>
#include <vnet/vnet.h>
#include <vnet/pg/pg.h>
#include <vppinfra/error.h>
#include <vnet/ip/ip.h>
#include <vppinfra/hash.h>
#include <vppinfra/error.h>
#include <vppinfra/elog.h>
#include <vnet/ip/ip6_hop_by_hop.h>
#include "ip6_ioam_e2e.h"
ioam_e2e_main_t ioam_e2e_main;
static u8 * ioam_e2e_trace_handler (u8 * s,
ip6_hop_by_hop_option_t *opt)
{
ioam_e2e_option_t * e2e = (ioam_e2e_option_t *)opt;
u32 seqno = 0;
if (e2e)
{
seqno = clib_net_to_host_u32 (e2e->e2e_hdr.e2e_data);
}
s = format (s, "SeqNo = 0x%Lx", seqno);
return s;
}
int
ioam_e2e_config_handler (void *data, u8 disable)
{
int *analyse = data;
/* Register hanlders if enabled */
if (!disable)
{
/* If encap node register for encap handler */
if (0 == *analyse)
{
if (ip6_hbh_register_option(HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE,
ioam_seqno_encap_handler,
ioam_e2e_trace_handler) < 0)
{
return (-1);
}
}
/* If analyze node then register for decap handler */
else
{
if (ip6_hbh_pop_register_option(HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE,
ioam_seqno_decap_handler) < 0)
{
return (-1);
}
}
return 0;
}
/* UnRegister handlers */
(void) ip6_hbh_unregister_option(HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE);
(void) ip6_hbh_pop_unregister_option(HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE);
return 0;
}
int
ioam_e2e_rewrite_handler (u8 *rewrite_string,
u8 *rewrite_size)
{
ioam_e2e_option_t *e2e_option;
if (rewrite_string && *rewrite_size == sizeof(ioam_e2e_option_t))
{
e2e_option = (ioam_e2e_option_t *)rewrite_string;
e2e_option->hdr.type = HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE
| HBH_OPTION_TYPE_SKIP_UNKNOWN;
e2e_option->hdr.length = sizeof (ioam_e2e_option_t) -
sizeof (ip6_hop_by_hop_option_t);
return(0);
}
return(-1);
}
u32
ioam_e2e_flow_handler (u32 ctx, u8 add)
{
ioam_e2e_data_t *data;
u16 i;
if (add)
{
pool_get(ioam_e2e_main.e2e_data, data);
data->flow_ctx = ctx;
ioam_seqno_init_data(&data->seqno_data);
return ((u32) (data - ioam_e2e_main.e2e_data));
}
/* Delete case */
for (i = 0; i < vec_len(ioam_e2e_main.e2e_data); i++)
{
if (pool_is_free_index(ioam_e2e_main.e2e_data, i))
continue;
data = pool_elt_at_index(ioam_e2e_main.e2e_data, i);
if (data && (data->flow_ctx == ctx))
{
pool_put_index(ioam_e2e_main.e2e_data, i);
return (0);
}
}
return 0;
}
static clib_error_t *
ioam_show_e2e_cmd_fn (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
ioam_e2e_data_t *e2e_data;
u8 *s = 0;
int i;
vec_reset_length(s);
s = format(0, "IOAM E2E information: \n");
for (i = 0; i < vec_len(ioam_e2e_main.e2e_data); i++)
{
if (pool_is_free_index(ioam_e2e_main.e2e_data, i))
continue;
e2e_data = pool_elt_at_index(ioam_e2e_main.e2e_data, i);
s = format(s, "Flow name: %s\n", get_flow_name_from_flow_ctx(e2e_data->flow_ctx));
s = show_ioam_seqno_cmd_fn(s,
&e2e_data->seqno_data,
!IOAM_DEAP_ENABLED(e2e_data->flow_ctx));
}
vlib_cli_output(vm, "%v", s);
return 0;
}
VLIB_CLI_COMMAND (ioam_show_e2e_cmd, static) = {
.path = "show ioam e2e ",
.short_help = "show ioam e2e information",
.function = ioam_show_e2e_cmd_fn,
};
/*
* Init handler E2E headet handling.
* Init hanlder registers encap, decap, trace and Rewrite handlers.
*/
static clib_error_t *
ioam_e2e_init (vlib_main_t * vm)
{
clib_error_t * error;
if ((error = vlib_call_init_function (vm, ip6_hop_by_hop_ioam_init)))
{
return(error);
}
/*
* As of now we have only PPC under E2E header.
*/
if (ip6_hbh_config_handler_register(HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE,
ioam_e2e_config_handler) < 0)
{
return (clib_error_create("Registration of "
"HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE for rewrite failed"));
}
if (ip6_hbh_add_register_option(HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE,
sizeof(ioam_e2e_option_t),
ioam_e2e_rewrite_handler) < 0)
{
return (clib_error_create("Registration of "
"HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE for rewrite failed"));
}
if (ip6_hbh_flow_handler_register(HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE,
ioam_e2e_flow_handler) < 0)
{
return (clib_error_create("Registration of "
"HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE Flow handler failed"));
}
ioam_e2e_main.vlib_main = vm;
ioam_e2e_main.vnet_main = vnet_get_main();
return (0);
}
/*
* Init function for the E2E lib.
* ip6_hop_by_hop_ioam_e2e_init gets called during init.
*/
VLIB_INIT_FUNCTION (ioam_e2e_init);
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