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/*
* Copyright (c) 2017 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.
*/
#ifndef PLUGINS_IOAM_PLUGIN_IOAM_ANALYSE_IP6_IOAM_ANALYSE_NODE_H_
#define PLUGINS_IOAM_PLUGIN_IOAM_ANALYSE_IP6_IOAM_ANALYSE_NODE_H_
#include <ioam/analyse/ioam_analyse.h>
#include <vnet/ip/ip6_hop_by_hop.h>
#include <ioam/encap/ip6_ioam_trace.h>
/** @brief IP6-iOAM analyser main structure.
@note cache aligned.
*/
typedef struct
{
/** Array of function pointer to analyse each hop-by-hop option. */
int (*analyse_hbh_handler[MAX_IP6_HBH_OPTION]) (u32 flow_id,
ip6_hop_by_hop_option_t *
opt, u16 len);
/** This contains the aggregated data from the time VPP started analysing. */
ioam_analyser_data_t *aggregated_data;
} ip6_ioam_analyser_main_t;
extern ip6_ioam_analyser_main_t ioam_analyser_main;
extern vlib_node_registration_t analyse_node_local;
extern vlib_node_registration_t analyse_node_remote;
void ip6_ioam_analyse_register_handlers (void);
void ip6_ioam_analyse_unregister_handlers (void);
clib_error_t *ip6_ioam_analyse_init (vlib_main_t * vm);
inline static ioam_analyser_data_t *
ioam_analyse_get_data_from_flow_id (u32 flow_id)
{
if (flow_id >= vec_len (ioam_analyser_main.aggregated_data))
return NULL;
if (ioam_analyser_main.aggregated_data[flow_id].is_free)
ioam_analyser_main.aggregated_data[flow_id].is_free = 0;
return (ioam_analyser_main.aggregated_data + flow_id);
}
always_inline void *
ip6_ioam_find_hbh_option (ip6_hop_by_hop_header_t * hbh0, u8 option)
{
ip6_hop_by_hop_option_t *opt0, *limit0;
u8 type0;
opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
limit0 =
(ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + ((hbh0->length + 1) << 3));
while (opt0 < limit0)
{
type0 = opt0->type;
if (type0 == option)
return ((void *) opt0);
if (0 == type0)
{
opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
continue;
}
opt0 = (ip6_hop_by_hop_option_t *)
(((u8 *) opt0) + opt0->length + sizeof (ip6_hop_by_hop_option_t));
}
return NULL;
}
always_inline int
ip6_ioam_analyse_compare_path_delay (ip6_hop_by_hop_header_t * hbh0,
ip6_hop_by_hop_header_t * hbh1,
bool oneway)
{
ioam_trace_option_t *trace0 = NULL, *trace1 = NULL;
f64 delay0, delay1;
trace0 =
ip6_ioam_find_hbh_option (hbh0, HBH_OPTION_TYPE_IOAM_TRACE_DATA_LIST);
trace1 =
ip6_ioam_find_hbh_option (hbh1, HBH_OPTION_TYPE_IOAM_TRACE_DATA_LIST);
if (PREDICT_FALSE ((trace0 == NULL) && (trace1 == NULL)))
return 0;
if (PREDICT_FALSE (trace1 == NULL))
return 1;
if (PREDICT_FALSE (trace0 == NULL))
return -1;
delay0 = ip6_ioam_analyse_calc_delay (&trace0->trace_hdr,
trace0->hdr.length - 2, oneway);
delay1 = ip6_ioam_analyse_calc_delay (&trace1->trace_hdr,
trace1->hdr.length - 2, oneway);
return (delay0 - delay1);
}
#endif /* PLUGINS_IOAM_PLUGIN_IOAM_ANALYSE_IP6_IOAM_ANALYSE_NODE_H_ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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