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>

1 files changed, 70 insertions, 0 deletions

diff --git a/plugins/ioam-plugin/ioam/encap/ip6_ioam_seqno.h b/plugins/ioam-plugin/ioam/encap/ip6_ioam_seqno.h
new file mode 100644
index 00000000000..13a84db0d71
--- /dev/null
+++ b/plugins/ioam-plugin/ioam/encap/ip6_ioam_seqno.h
@@ -0,0 +1,70 @@
+/*
+ * 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.
+ */
+
+#ifndef __included_ip6_ioam_seqno_h__
+#define __included_ip6_ioam_seqno_h__
+
+#include <vnet/ip/ip6_packet.h>
+#include <vnet/ip/ip6_hop_by_hop.h>
+
+#define SEQ_CHECK_VALUE 0x80000000 /* for seq number wraparound detection */
+
+#define SEQNO_WINDOW_SIZE 2048
+#define SEQNO_WINDOW_ARRAY_SIZE 64
+
+typedef struct seqno_bitmap_ {
+  u32 window_size;
+  u32 array_size;
+  u32 mask;
+  u32 pad;
+  u64 highest;
+  u64 array[SEQNO_WINDOW_ARRAY_SIZE];    /* Will be alloc to array_size */
+} seqno_bitmap;
+
+typedef struct seqno_rx_info_ {
+  u64 rx_packets;
+  u64 lost_packets;
+  u64 reordered_packets;
+  u64 dup_packets;
+  seqno_bitmap bitmap;
+} seqno_rx_info;
+
+/* This structure is 64-byte aligned */
+typedef struct ioam_seqno_data_ {
+  union {
+    u32 seq_num; /* Useful only for encap node */
+    seqno_rx_info seqno_rx;
+  };
+} ioam_seqno_data;
+
+typedef struct ioam_seqno_data_main_t_ {
+  ioam_seqno_data *seqno_data;
+} ioam_seqno_data_main_t;
+
+void ioam_seqno_init_bitmap(ioam_seqno_data *data);
+
+int ioam_seqno_encap_handler(vlib_buffer_t *b, ip6_header_t *ip,
+                             ip6_hop_by_hop_option_t *opt);
+
+int
+ioam_seqno_decap_handler(vlib_buffer_t *b, ip6_header_t *ip,
+                         ip6_hop_by_hop_option_t *opt);
+
+void ioam_analyze_seqno(seqno_rx_info *ppc_rx, u64 seqno);
+
+u8 *
+show_ioam_seqno_cmd_fn(u8 *s, ioam_seqno_data *seqno_data, u8 enc);
+
+#endif