2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
17 #include <vlib/vlib.h>
18 #include <vnet/vnet.h>
19 #include <vnet/pg/pg.h>
20 #include <vppinfra/error.h>
22 #include <vnet/ip/ip.h>
24 #include <vppinfra/hash.h>
25 #include <vppinfra/error.h>
26 #include <vppinfra/elog.h>
28 #include "ip6_ioam_seqno.h"
29 #include "ip6_ioam_e2e.h"
33 * This Routine gets called from IPv6 hop-by-hop option handling.
34 * Only if we are encap node, then add PPC data.
35 * On a Transit(MID) node we dont do anything with E2E headers.
36 * On decap node decap is handled by seperate function.
39 ioam_seqno_encap_handler (vlib_buffer_t *b, ip6_header_t *ip,
40 ip6_hop_by_hop_option_t *opt)
42 u32 opaque_index = vnet_buffer(b)->l2_classify.opaque_index;
43 ioam_e2e_option_t * e2e;
45 ioam_seqno_data *data;
47 /* Bypass seqno processing */
48 if (PREDICT_FALSE(opaque_index == 0x7FFFFFFF))
51 data = ioam_e2ec_get_seqno_data_from_flow_ctx(opaque_index);
52 e2e = (ioam_e2e_option_t *) opt;
53 e2e->e2e_hdr.e2e_data = clib_host_to_net_u32(++data->seq_num);
59 * This Routine gets called on POP/Decap node.
62 ioam_seqno_decap_handler (vlib_buffer_t *b, ip6_header_t *ip,
63 ip6_hop_by_hop_option_t *opt)
65 u32 opaque_index = vnet_buffer(b)->l2_classify.opaque_index;
66 ioam_e2e_option_t * e2e;
68 ioam_seqno_data *data;
70 data = ioam_e2ec_get_seqno_data_from_flow_ctx(opaque_index);
71 e2e = (ioam_e2e_option_t *) opt;
72 ioam_analyze_seqno(&data->seqno_rx,
73 (u64) clib_net_to_host_u32(e2e->e2e_hdr.e2e_data));