feat: boostrap hicn 22.02

The current patch provides several new features, improvements,
bug fixes and also complete rewrite of entire components.

- lib
The hicn packet parser has been improved with a new packet
format fully based on UDP. The TCP header is still temporarily
supported but the UDP header will replace completely the new hicn
packet format. Improvements have been made to make sure every
packet parsing operation is made via this library. The current
new header can be used as header between the payload and the
UDP header or as trailer in the UDP surplus area to be tested
when UDP options will start to be used.

- hicn-light
The portable packet forwarder has been completely rewritten from
scratch with the twofold objective to improve performance and
code size but  also to drop dependencies such as libparc which is
now removed by the current implementation.

- hicn control
the control library is the agent that is used to program the
packet forwarders via their binary API. This component has
benefited from significant improvements in terms of interaction
model which is now event driven and more robust to failures.

- VPP plugin has been updated to support VPP 22.02

- transport
Major improvement have been made to the RTC protocol, to the
support of IO modules and to the security sub system. Signed
manifests are the default data authenticity and integrity framework.
Confidentiality can be enabled by sharing the encryption key to the
prod/cons layer. The library has been tested with group key based
applications such as broadcast/multicast and real-time on-line
meetings with trusted server keys or MLS.

- testing
Unit testing has been introduced using GoogleTest. One third of
the code base is covered by unit testing with priority on
critical features. Functional testing has also been introduce
using Docker, linux bridging and Robot Framework to define
test with Less Code techniques to facilitate the extension
of the coverage.

Co-authored-by: Mauro Sardara <msardara@cisco.com>
Co-authored-by: Jordan Augé <jordan.auge+fdio@cisco.com>
Co-authored-by: Michele Papalini <micpapal@cisco.com>
Co-authored-by: Angelo Mantellini <manangel@cisco.com>
Co-authored-by: Jacques Samain <jsamain@cisco.com>
Co-authored-by: Olivier Roques <oroques+fdio@cisco.com>
Co-authored-by: Enrico Loparco <eloparco@cisco.com>
Co-authored-by: Giulio Grassi <gigrassi@cisco.com>

Change-Id: I75d0ef70f86d921e3ef503c99271216ff583c215
Signed-off-by: Luca Muscariello <muscariello@ieee.org>
Signed-off-by: Mauro Sardara <msardara@cisco.com>

1 files changed, 114 insertions, 0 deletions

diff --git a/hicn-light/src/hicn/strategies/probe_generator.c b/hicn-light/src/hicn/strategies/probe_generator.c
new file mode 100644
index 000000000..439de0a12
--- /dev/null
+++ b/hicn-light/src/hicn/strategies/probe_generator.c
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2021 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 "probe_generator.h"
+
+#include <hicn/core/forwarder.h>
+#include <hicn/core/nexthops.h>
+
+// map functions
+static void add_to_map(probe_generator_t *pg, unsigned seq, Ticks now) {
+  khiter_t k;
+  int ret;
+  k = kh_put_bp_map(pg->ticks_by_seq, seq, &ret);
+  kh_value(pg->ticks_by_seq, k) = now;
+}
+
+static Ticks get_from_map(probe_generator_t *pg, unsigned seq) {
+  khiter_t k;
+  k = kh_get_bp_map(pg->ticks_by_seq, seq);
+  if (k == kh_end(pg->ticks_by_seq)) return 0;
+  Ticks t = kh_value(pg->ticks_by_seq, k);
+  return t;
+}
+
+static void remove_from_map(probe_generator_t *pg, unsigned seq) {
+  khiter_t k;
+  k = kh_get_bp_map(pg->ticks_by_seq, seq);
+  if (k != kh_end(pg->ticks_by_seq)) kh_del_bp_map(pg->ticks_by_seq, k);
+}
+
+static void clear_map(probe_generator_t *pg) {
+  kh_clear(bp_map, pg->ticks_by_seq);
+}
+
+// seq number generator
+
+static uint32_t get_seq_number(probe_generator_t *pg) {
+  uint32_t seq = 0;
+  uint32_t try = 0;
+  while (try < 3) {  // try up to 3 times
+    seq =
+        (rand() % (MAX_PROBE_SUFFIX - MIN_PROBE_SUFFIX + 1)) + MIN_PROBE_SUFFIX;
+    Ticks time = get_from_map(pg, seq);
+    if (time == 0) return seq;  // seq does not exists
+    try++;
+  }
+  return 0;
+}
+
+// probing functions
+
+probe_generator_t *create_probe_generator() {
+  probe_generator_t *pg = calloc(1, sizeof(probe_generator_t));
+  if (!pg) return NULL;
+
+  pg->ticks_by_seq = kh_init_bp_map();
+  return pg;
+}
+
+void destroy_probe_generator(probe_generator_t *pg) {
+  kh_destroy_bp_map(pg->ticks_by_seq);
+  free(pg);
+}
+
+int generate_probe(probe_generator_t *pg, const msgbuf_t *msgbuf,
+                   const forwarder_t *forwarder, nexthop_t nexthop) {
+  msgbuf_pool_t *msgbuf_pool = forwarder_get_msgbuf_pool(forwarder);
+  connection_table_t *table = forwarder_get_connection_table(forwarder);
+  const connection_t *conn = connection_table_get_by_id(table, nexthop);
+  if (!conn) return -1;
+
+  msgbuf_t *probe;
+  off_t msg_id = msgbuf_pool_get_id(msgbuf_pool, (msgbuf_t *)msgbuf);
+  off_t probe_offset = msgbuf_pool_clone(msgbuf_pool, &probe, msg_id);
+
+  uint32_t seq = get_seq_number(pg);
+  if (seq == 0) return -1;
+
+  messageHandler_ModifySuffix(msgbuf_get_packet(probe), seq);
+  connection_send(conn, probe_offset, true);
+  connection_flush(conn);
+  add_to_map(pg, seq, ticks_now());
+  msgbuf_pool_put(msgbuf_pool, probe);
+
+  return 0;
+}
+
+Ticks register_probe(probe_generator_t *pg, unsigned seq) {
+  Ticks now = ticks_now();
+  add_to_map(pg, seq, now);
+  return now;
+}
+
+Ticks get_probe_send_time(probe_generator_t *pg, unsigned seq) {
+  return get_from_map(pg, seq);
+}
+
+void delete_probe(probe_generator_t *pg, unsigned seq) {
+  remove_from_map(pg, seq);
+}
+
+void delete_all_probes(probe_generator_t *pg) { clear_map(pg); }