[HICN-690] Transport Library Major Refactory

The current patch provides a major refactory of the transportlibrary.
A summary of the different components that underwent major modifications is
reported below.

- Transport protocol updates
The hierarchy of classes has been optimized to have common transport services
across different transport protocols. This can allow to customize a transport
protocol with new features.

- A new real-time communication protocol
The RTC protocol has been optimized in terms of algorithms to reduce
consumer-producer synchronization latency.

- A novel socket API
The API has been reworked to be easier to consumer but also to have a more
efficient integration in L4 proxies.

- Several performance improvements
A large number of performance improvements have been included in
particular to make the entire stack zero-copy and optimize cache miss.

- New memory buffer framework
Memory management has been reworked entirely to provide a more efficient infra
with a richer API. Buffers are now allocated in blocks and a single buffer
holds the memory for (1) the shared_ptr control block, (2) the metadata of the
packet (e.g. name, pointer to other buffers if buffer is chained and relevant
offsets), and (3) the packet itself, as it is sent/received over the network.

- A new slab allocator
Dynamic memory allocation is now managed by a novel slab allocator that is
optimised for packet processing and connection management. Memory is organized
in pools of blocks all of the same size which are used during the processing of
outgoing/incoming packets. When a memory block Is allocated is always taken
from a global pool and when it is deallocated is returned to the pool, thus
avoiding the cost of any heap allocation in the data path.

- New transport connectors
Consumer and producer end-points can communication either using an hicn packet
forwarder or with direct connector based on shared memories or sockets.
The usage of transport connectors typically for unit and funcitonal
testing but may have additional usage.

- Support for FEC/ECC for transport services
FEC/ECC via reed solomon is supported by default and made available to
transport services as a modular component. Reed solomon block codes is a
default FEC model that can be replaced in a modular way by many other
codes including RLNC not avaiable in this distribution.
The current FEC framework support variable size padding and efficiently
makes use of the infra memory buffers to avoid additiona copies.

- Secure transport framework for signature computation and verification
Crypto support is nativelty used in hICN for integrity and authenticity.
Novel support that includes RTC has been implemented and made modular
and reusable acrosso different transport protocols.

- TLS - Transport layer security over hicn
Point to point confidentiality is provided by integrating TLS on top of
hICN reliable and non-reliable transport. The integration is common and
makes a different use of the TLS record.

- MLS - Messaging layer security over hicn
MLS integration on top of hICN is made by using the MLSPP implemetation
open sourced by Cisco. We have included instrumentation tools to deploy
performance and functional tests of groups of end-points.

- Android support
The overall code has been heavily tested in Android environments and
has received heavy lifting to better run natively in recent Android OS.

Co-authored-by: Mauro Sardara <msardara@cisco.com>
Co-authored-by: Michele Papalini <micpapal@cisco.com>
Co-authored-by: Olivier Roques <oroques+fdio@cisco.com>
Co-authored-by: Giulio Grassi <gigrassi@cisco.com>
Change-Id: If477ba2fa686e6f47bdf96307ac60938766aef69
Signed-off-by: Luca Muscariello <muscariello@ieee.org>

5 files changed, 33 insertions, 23 deletions

diff --git a/lib/src/protocol/ah.c b/lib/src/protocol/ah.c
index da08d1ee8..03f3af04a 100644
--- a/lib/src/protocol/ah.c
+++ b/lib/src/protocol/ah.c
@@ -113,7 +113,7 @@ ah_rewrite_interest (hicn_type_t type, hicn_protocol_t * h,
 int
 ah_rewrite_data (hicn_type_t type, hicn_protocol_t * h,
 		 const ip46_address_t * addr_new, ip46_address_t * addr_old,
-		 const hicn_faceid_t face_id)
+		 const hicn_faceid_t face_id, u8 reset_pl)
 {
   /* Nothing to do on signature */
   return HICN_LIB_ERROR_NONE;
diff --git a/lib/src/protocol/icmp.c b/lib/src/protocol/icmp.c
index b24c0f11e..a16353427 100644
--- a/lib/src/protocol/icmp.c
+++ b/lib/src/protocol/icmp.c
@@ -118,7 +118,7 @@ icmp_rewrite_interest (hicn_type_t type, hicn_protocol_t * h,
 int
 icmp_rewrite_data (hicn_type_t type, hicn_protocol_t * h,
 		   const ip46_address_t * addr_new, ip46_address_t * addr_old,
-		   const hicn_faceid_t face_id)
+		   const hicn_faceid_t face_id, u8 reset_pl)
 {
   return HICN_LIB_ERROR_NOT_IMPLEMENTED;
 //    u16 *icmp_checksum = &(h->icmp.csum);
diff --git a/lib/src/protocol/ipv4.c b/lib/src/protocol/ipv4.c
index 781907231..73ce12ee0 100644
--- a/lib/src/protocol/ipv4.c
+++ b/lib/src/protocol/ipv4.c
@@ -324,7 +324,7 @@ ipv4_rewrite_interest (hicn_type_t type, hicn_protocol_t * h,
 int
 ipv4_rewrite_data (hicn_type_t type, hicn_protocol_t * h,
 		   const ip46_address_t * addr_new, ip46_address_t * addr_old,
-		   const hicn_faceid_t face_id)
+		   const hicn_faceid_t face_id, u8 reset_pl)
 {
   // ASSERT(addr_old == NULL);
   addr_old->ip4 = h->ipv4.daddr;
@@ -336,7 +336,7 @@ ipv4_rewrite_data (hicn_type_t type, hicn_protocol_t * h,
   h->ipv4.csum = 0;
   h->ipv4.csum = csum (&h->ipv4, IPV4_HDRLEN, 0);
 
-  return CHILD_OPS (rewrite_data, type, h, addr_new, addr_old, face_id);
+  return CHILD_OPS (rewrite_data, type, h, addr_new, addr_old, face_id, reset_pl);
 }
 
 int
diff --git a/lib/src/protocol/ipv6.c b/lib/src/protocol/ipv6.c
index f23b01cd8..bf8123497 100644
--- a/lib/src/protocol/ipv6.c
+++ b/lib/src/protocol/ipv6.c
@@ -220,19 +220,13 @@ ipv6_update_checksums (hicn_type_t type, hicn_protocol_t * h,
 		       u16 partial_csum, size_t payload_length)
 {
   /* Retrieve payload length if not specified */
-  if (payload_length == 0)
+  if (payload_length == ~0)
     {
       int rc = ipv6_get_payload_length (type, h, &payload_length);
       if (rc < 0)
 	return rc;
     }
 
-  /* Ignore the payload if payload_length = ~0 */
-  if (payload_length == ~0)
-    {
-      payload_length = 0;
-    }
-
   /* Build pseudo-header */
   ipv6_pseudo_header_t psh;
   psh.ip_src = h->ipv6.saddr;
@@ -258,7 +252,7 @@ ipv6_verify_checksums (hicn_type_t type, hicn_protocol_t * h,
 		       u16 partial_csum, size_t payload_length)
 {
   /* Retrieve payload length if not specified */
-  if (payload_length == 0)
+  if (payload_length == ~0)
     {
       int rc = ipv6_get_payload_length (type, h, &payload_length);
       if (rc < 0)
@@ -276,7 +270,11 @@ ipv6_verify_checksums (hicn_type_t type, hicn_protocol_t * h,
   pseudo.protocol = h->ipv6.nxt;
 
   /* Compute partial checksum based on pseudo-header */
-  partial_csum = csum (&pseudo, IPV6_PSHDRLEN, 0);
+  if (partial_csum != 0)
+    {
+      partial_csum = ~partial_csum;
+    }
+  partial_csum = csum (&pseudo, IPV6_PSHDRLEN, partial_csum);
 
   return CHILD_OPS (verify_checksums, type, h, partial_csum, payload_length);
 }
@@ -296,13 +294,13 @@ ipv6_rewrite_interest (hicn_type_t type, hicn_protocol_t * h,
 int
 ipv6_rewrite_data (hicn_type_t type, hicn_protocol_t * h,
 		   const ip46_address_t * addr_new, ip46_address_t * addr_old,
-		   const hicn_faceid_t face_id)
+		   const hicn_faceid_t face_id, u8 reset_pl)
 {
   // ASSERT(addr_old == NULL);
   addr_old->ip6 = h->ipv6.daddr;
   h->ipv6.daddr = addr_new->ip6;
 
-  return CHILD_OPS (rewrite_data, type, h, addr_new, addr_old, face_id);
+  return CHILD_OPS (rewrite_data, type, h, addr_new, addr_old, face_id, reset_pl);
 }
 
 int
diff --git a/lib/src/protocol/tcp.c b/lib/src/protocol/tcp.c
index c6099bf8f..95f93c6af 100644
--- a/lib/src/protocol/tcp.c
+++ b/lib/src/protocol/tcp.c
@@ -170,12 +170,12 @@ tcp_update_data_pathlabel (hicn_type_t type, hicn_protocol_t * h,
 			   const hicn_faceid_t face_id)
 {
   hicn_pathlabel_t pl =
-    (hicn_pathlabel_t) ((h->tcp.pathlabel & HICN_PATH_LABEL_MASK) >> (32 -
-								      HICN_PATH_LABEL_SIZE));
+    (hicn_pathlabel_t) (h->tcp.seq_ack >> (32 - HICN_PATH_LABEL_SIZE));
+
   hicn_pathlabel_t new_pl;
 
   update_pathlabel (pl, face_id, &new_pl);
-  h->tcp.pathlabel = new_pl;
+  h->tcp.seq_ack = (new_pl << (32 - HICN_PATH_LABEL_SIZE));
 
   return HICN_LIB_ERROR_NONE;
 }
@@ -249,7 +249,12 @@ int
 tcp_verify_checksums (hicn_type_t type, hicn_protocol_t * h, u16 partial_csum,
 		      size_t payload_length)
 {
-  if (csum (h, TCP_HDRLEN + payload_length, ~partial_csum) != 0)
+  if (PREDICT_TRUE (partial_csum != 0))
+    {
+      partial_csum = ~partial_csum;
+    }
+  
+  if (csum (h, TCP_HDRLEN + payload_length, partial_csum) != 0)
     return HICN_LIB_ERROR_CORRUPTED_PACKET;
   return CHILD_OPS (verify_checksums, type, h, 0, payload_length);
 }
@@ -307,11 +312,19 @@ tcp_rewrite_interest (hicn_type_t type, hicn_protocol_t * h,
 int
 tcp_rewrite_data (hicn_type_t type, hicn_protocol_t * h,
 		  const ip46_address_t * addr_new, ip46_address_t * addr_old,
-		  const hicn_faceid_t face_id)
+		  const hicn_faceid_t face_id, u8 reset_pl)
 {
+
   u16 *tcp_checksum = &(h->tcp.csum);
   int ret = check_tcp_checksum(*tcp_checksum);
 
+  /*
+   * update path label
+   */
+  u16 old_pl = h->tcp.seq_ack;
+  if(reset_pl) h->tcp.seq_ack = 0;
+  tcp_update_data_pathlabel (type, h, face_id);
+
   if (ret)
     {
       return ret;
@@ -330,9 +343,8 @@ tcp_rewrite_data (hicn_type_t type, hicn_protocol_t * h,
   csum = ip_csum_add_even (csum, (ip_csum_t) (addr_new->ip6.as_u64[0]));
   csum = ip_csum_add_even (csum, (ip_csum_t) (addr_new->ip6.as_u64[1]));
 
-  csum = ip_csum_sub_even (csum, h->tcp.pathlabel);
-  tcp_update_data_pathlabel (type, h, face_id);
-  csum = ip_csum_add_even (csum, h->tcp.pathlabel);
+  csum = ip_csum_sub_even (csum, old_pl);
+  csum = ip_csum_add_even (csum, h->tcp.seq_ack);
 
   *tcp_checksum = ip_csum_fold (csum);