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authorAkshayaNadahalli <anadahal@cisco.com>2016-08-09 13:38:04 +0530
committerDave Barach <openvpp@barachs.net>2016-11-03 11:44:21 +0000
commited4a2fdd4d62c46a2237157cd3a72bda16fceb6a (patch)
tree1fa59d681435a39f3b7f840b60229f8c3edf4f19 /plugins/ioam-plugin/ioam/encap/ip6_ioam_seqno.c
parent273c26a531bf031b3426588041bad67fe7f0a246 (diff)
Adding Sequence Number - Per Packet Counter(PPC) support for iOAM6.
- 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>
Diffstat (limited to 'plugins/ioam-plugin/ioam/encap/ip6_ioam_seqno.c')
-rw-r--r--plugins/ioam-plugin/ioam/encap/ip6_ioam_seqno.c109
1 files changed, 109 insertions, 0 deletions
diff --git a/plugins/ioam-plugin/ioam/encap/ip6_ioam_seqno.c b/plugins/ioam-plugin/ioam/encap/ip6_ioam_seqno.c
new file mode 100644
index 00000000000..0b4d4192975
--- /dev/null
+++ b/plugins/ioam-plugin/ioam/encap/ip6_ioam_seqno.c
@@ -0,0 +1,109 @@
+/*
+ * 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 "ip6_ioam_seqno.h"
+#include "ip6_ioam_e2e.h"
+
+ioam_seqno_data_main_t ioam_seqno_main;
+
+void ioam_seqno_init_bitmap (ioam_seqno_data *data)
+{
+ seqno_bitmap *bitmap = &data->seqno_rx.bitmap;
+ bitmap->window_size = SEQNO_WINDOW_SIZE;
+ bitmap->array_size = SEQNO_WINDOW_ARRAY_SIZE;
+ bitmap->mask = 32 * SEQNO_WINDOW_ARRAY_SIZE - 1;
+ bitmap->array[0] = 0x00000000;/* pretend we haven seen sequence numbers 0*/
+ bitmap->highest = 0;
+
+ data->seq_num = 0;
+ return ;
+}
+
+/*
+ * This Routine gets called from IPv6 hop-by-hop option handling.
+ * Only if we are encap node, then add PPC data.
+ * On a Transit(MID) node we dont do anything with E2E headers.
+ * On decap node decap is handled by seperate function.
+ */
+int
+ioam_seqno_encap_handler (vlib_buffer_t *b, ip6_header_t *ip,
+ ip6_hop_by_hop_option_t *opt)
+{
+ u32 opaque_index = vnet_buffer(b)->l2_classify.opaque_index;
+ ioam_e2e_option_t * e2e;
+ int rv = 0;
+ ioam_seqno_data *data;
+
+ data = ioam_e2ec_get_seqno_data_from_flow_ctx(opaque_index);
+ e2e = (ioam_e2e_option_t *) opt;
+ e2e->e2e_data = clib_host_to_net_u32(++data->seq_num);
+
+ return (rv);
+}
+
+/*
+ * This Routine gets called on POP/Decap node.
+ */
+int
+ioam_seqno_decap_handler (vlib_buffer_t *b, ip6_header_t *ip,
+ ip6_hop_by_hop_option_t *opt)
+{
+ u32 opaque_index = vnet_buffer(b)->l2_classify.opaque_index;
+ ioam_e2e_option_t * e2e;
+ int rv = 0;
+ ioam_seqno_data *data;
+
+ data = ioam_e2ec_get_seqno_data_from_flow_ctx(opaque_index);
+ e2e = (ioam_e2e_option_t *) opt;
+ ioam_analyze_seqno(&data->seqno_rx, (u64) clib_net_to_host_u32(e2e->e2e_data));
+
+ return (rv);
+}
+
+u8 *
+show_ioam_seqno_cmd_fn (u8 *s, ioam_seqno_data *seqno_data, u8 enc)
+{
+ seqno_rx_info *rx;
+
+ s = format(s, "SeqNo Data:\n");
+ if (enc)
+ {
+ s = format(s, " Current Seq. Number : %llu\n", seqno_data->seq_num);
+ }
+ else
+ {
+ rx = &seqno_data->seqno_rx;
+ s = format(s, " Highest Seq. Number : %llu\n", rx->bitmap.highest);
+ s = format(s, " Packets received : %llu\n", rx->rx_packets);
+ s = format(s, " Lost packets : %llu\n", rx->lost_packets);
+ s = format(s, " Reordered packets : %llu\n", rx->reordered_packets);
+ s = format(s, " Duplicate packets : %llu\n", rx->dup_packets);
+ }
+
+ format(s, "\n");
+ return s;
+}