ed4a2fdd4d
- Added support in classifier session to identify a flow to be iOAM6 encap/decap - Sequence number as part of iOAM6 E2E header is created as a plugin. Change-Id: Ib7605de45aecff25d684d099b525f8dc96ee7038 Signed-off-by: AkshayaNadahalli <anadahal@cisco.com>
110 lines
3.1 KiB
C
110 lines
3.1 KiB
C
/*
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* Copyright (c) 2016 Cisco and/or its affiliates.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <vlib/vlib.h>
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#include <vnet/vnet.h>
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#include <vnet/pg/pg.h>
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#include <vppinfra/error.h>
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#include <vnet/ip/ip.h>
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#include <vppinfra/hash.h>
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#include <vppinfra/error.h>
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#include <vppinfra/elog.h>
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#include "ip6_ioam_seqno.h"
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#include "ip6_ioam_e2e.h"
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ioam_seqno_data_main_t ioam_seqno_main;
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void ioam_seqno_init_bitmap (ioam_seqno_data *data)
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{
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seqno_bitmap *bitmap = &data->seqno_rx.bitmap;
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bitmap->window_size = SEQNO_WINDOW_SIZE;
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bitmap->array_size = SEQNO_WINDOW_ARRAY_SIZE;
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bitmap->mask = 32 * SEQNO_WINDOW_ARRAY_SIZE - 1;
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bitmap->array[0] = 0x00000000;/* pretend we haven seen sequence numbers 0*/
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bitmap->highest = 0;
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data->seq_num = 0;
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return ;
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}
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/*
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* This Routine gets called from IPv6 hop-by-hop option handling.
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* Only if we are encap node, then add PPC data.
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* On a Transit(MID) node we dont do anything with E2E headers.
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* On decap node decap is handled by seperate function.
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*/
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int
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ioam_seqno_encap_handler (vlib_buffer_t *b, ip6_header_t *ip,
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ip6_hop_by_hop_option_t *opt)
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{
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u32 opaque_index = vnet_buffer(b)->l2_classify.opaque_index;
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ioam_e2e_option_t * e2e;
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int rv = 0;
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ioam_seqno_data *data;
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data = ioam_e2ec_get_seqno_data_from_flow_ctx(opaque_index);
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e2e = (ioam_e2e_option_t *) opt;
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e2e->e2e_data = clib_host_to_net_u32(++data->seq_num);
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return (rv);
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}
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/*
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* This Routine gets called on POP/Decap node.
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*/
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int
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ioam_seqno_decap_handler (vlib_buffer_t *b, ip6_header_t *ip,
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ip6_hop_by_hop_option_t *opt)
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{
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u32 opaque_index = vnet_buffer(b)->l2_classify.opaque_index;
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ioam_e2e_option_t * e2e;
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int rv = 0;
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ioam_seqno_data *data;
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data = ioam_e2ec_get_seqno_data_from_flow_ctx(opaque_index);
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e2e = (ioam_e2e_option_t *) opt;
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ioam_analyze_seqno(&data->seqno_rx, (u64) clib_net_to_host_u32(e2e->e2e_data));
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return (rv);
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}
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u8 *
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show_ioam_seqno_cmd_fn (u8 *s, ioam_seqno_data *seqno_data, u8 enc)
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{
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seqno_rx_info *rx;
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s = format(s, "SeqNo Data:\n");
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if (enc)
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{
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s = format(s, " Current Seq. Number : %llu\n", seqno_data->seq_num);
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}
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else
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{
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rx = &seqno_data->seqno_rx;
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s = format(s, " Highest Seq. Number : %llu\n", rx->bitmap.highest);
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s = format(s, " Packets received : %llu\n", rx->rx_packets);
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s = format(s, " Lost packets : %llu\n", rx->lost_packets);
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s = format(s, " Reordered packets : %llu\n", rx->reordered_packets);
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s = format(s, " Duplicate packets : %llu\n", rx->dup_packets);
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}
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format(s, "\n");
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return s;
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}
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