[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>

9 files changed, 326 insertions, 220 deletions

diff --git a/lib/src/CMakeLists.txt b/lib/src/CMakeLists.txt
index 7eecaf775..49b735f51 100644
--- a/lib/src/CMakeLists.txt
+++ b/lib/src/CMakeLists.txt
@@ -42,7 +42,7 @@ if (DISABLE_SHARED_LIBRARIES)
     COMPONENT lib${LIBHICN}
     INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/../includes
     DEFINITIONS ${COMPILER_DEFINITIONS}
-    INSTALL_ROOT_DIR hicn
+    HEADER_ROOT_DIR hicn
     INSTALL_HEADERS ${LIBHICN_HEADER_FILES} ${LIBHICN_HEADER_FILES_PROTOCOL} ${LIBHICN_HEADER_FILES_UTIL}
     LINK_LIBRARIES ${WSOCK32_LIBRARY} ${WS2_32_LIBRARY}
   )
@@ -53,7 +53,7 @@ else ()
     COMPONENT lib${LIBHICN}
     INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/../includes
     DEFINITIONS ${COMPILER_DEFINITIONS}
-    INSTALL_ROOT_DIR hicn
+    HEADER_ROOT_DIR hicn
     INSTALL_HEADERS ${LIBHICN_HEADER_FILES} ${LIBHICN_HEADER_FILES_PROTOCOL} ${LIBHICN_HEADER_FILES_UTIL}
     LINK_LIBRARIES ${WSOCK32_LIBRARY} ${WS2_32_LIBRARY}
   )
diff --git a/lib/src/common.c b/lib/src/common.c
index 228a59d1e..562771e09 100644
--- a/lib/src/common.c
+++ b/lib/src/common.c
@@ -119,7 +119,7 @@ hicn_packet_dump (const uint8_t * buffer, size_t len)
   // Output description if given.
   if (len == 0)
     {
-      TRACE ("  ZERO LENGTH\n");
+      printf ("  ZERO LENGTH\n");
       return;
     }
 
@@ -132,14 +132,14 @@ hicn_packet_dump (const uint8_t * buffer, size_t len)
 	{
 	  // Just don't print ASCII for the zeroth line.
 	  if (i != 0)
-	    TRACE ("  %s\n", buff);
+	    printf ("  %s\n", buff);
 
 	  // Output the offset.
-	  TRACE ("  %04x ", i);
+	  printf ("  %04x ", i);
 	}
 
       // Now the hex code for the specific character.
-      TRACE (" %02x", pc[i]);
+      printf (" %02x", pc[i]);
 
       // And store a printable ASCII character for later.
       if ((pc[i] < 0x20) || (pc[i] > 0x7e))
@@ -152,12 +152,12 @@ hicn_packet_dump (const uint8_t * buffer, size_t len)
   // Pad out last line if not exactly 16 characters.
   while ((i % 16) != 0)
     {
-      TRACE ("   ");
+      printf ("   ");
       i++;
     }
 
   // And print the final ASCII bit.
-  TRACE ("  %s\n", buff);
+  printf ("  %s\n", buff);
 }
 
 /*
diff --git a/lib/src/compat.c b/lib/src/compat.c
index 615175e3b..779a47315 100644
--- a/lib/src/compat.c
+++ b/lib/src/compat.c
@@ -20,8 +20,8 @@
 #ifndef _WIN32
 #include <netinet/in.h>
 #endif
-#include <string.h>		// memset
-#include <stddef.h>		// offsetof
+#include <string.h> // memset
+#include <stddef.h> // offsetof
 
 #include <hicn/common.h>
 #include <hicn/compat.h>
@@ -30,13 +30,13 @@
 #include <hicn/name.h>
 #include <hicn/ops.h>
 
-#define member_size(type, member) sizeof(((type *)0)->member)
-#define ARRAY_SIZE(a) (sizeof(a) / sizeof(*(a)))
+#define member_size(type, member) sizeof (((type *) 0)->member)
+#define ARRAY_SIZE(a)		  (sizeof (a) / sizeof (*(a)))
 
 #define HICN_NAME_COMPONENT_SIZE 2
 
 int
-hicn_packet_get_format (const hicn_header_t * h, hicn_format_t * format)
+hicn_packet_get_format (const hicn_header_t *h, hicn_format_t *format)
 {
   *format = HF_UNSPEC;
 
@@ -122,7 +122,7 @@ hicn_format_to_type (hicn_format_t format)
  * This function is used to wrap old API calls to new ones
  */
 hicn_type_t
-hicn_header_to_type (const hicn_header_t * h)
+hicn_header_to_type (const hicn_header_t *h)
 {
   hicn_format_t format;
   hicn_packet_get_format (h, &format);
@@ -130,39 +130,47 @@ hicn_header_to_type (const hicn_header_t * h)
 }
 
 int
-hicn_packet_init_header (hicn_format_t format, hicn_header_t * packet)
+hicn_packet_init_header (hicn_format_t format, hicn_header_t *packet)
 {
   hicn_type_t type = hicn_format_to_type (format);
+
+  if (hicn_type_is_none (type))
+    {
+      return HICN_LIB_ERROR_UNEXPECTED;
+    }
+
   return hicn_ops_vft[type.l1]->init_packet_header (type, &packet->protocol);
 }
 
 int
-hicn_packet_compute_checksum (hicn_format_t format, hicn_header_t * h)
+hicn_packet_compute_checksum (hicn_format_t format, hicn_header_t *h)
 {
   hicn_type_t type = hicn_format_to_type (format);
-  return hicn_ops_vft[type.l1]->update_checksums (type, &h->protocol, 0, 0);
+  return hicn_ops_vft[type.l1]->update_checksums (type, &h->protocol, 0, ~0);
 }
 
 int
-hicn_packet_compute_header_checksum (hicn_format_t format, hicn_header_t * h,
+hicn_packet_compute_header_checksum (hicn_format_t format, hicn_header_t *h,
 				     u16 init_sum)
 {
   hicn_type_t type = hicn_format_to_type (format);
-  /* payload_length == ~0: ignore payload */
-  return hicn_ops_vft[type.l1]->update_checksums (type, &h->protocol,
-						  init_sum, ~0);
+  /* payload_length == 0: ignore payload */
+  return hicn_ops_vft[type.l1]->update_checksums (type, &h->protocol, init_sum,
+						  0);
 }
 
 int
-hicn_packet_check_integrity (hicn_format_t format, hicn_header_t * h)
+hicn_packet_check_integrity_no_payload (hicn_format_t format, hicn_header_t *h,
+					u16 init_sum)
 {
   hicn_type_t type = hicn_format_to_type (format);
-  return hicn_ops_vft[type.l1]->verify_checksums (type, &h->protocol, 0, 0);
+  return hicn_ops_vft[type.l1]->verify_checksums (type, &h->protocol, init_sum,
+						  0);
 }
 
 int
 hicn_packet_get_header_length_from_format (hicn_format_t format,
-					   size_t * header_length)
+					   size_t *header_length)
 {
   *header_length = _is_ipv4 (format) * IPV4_HDRLEN;
   *header_length += _is_ipv6 (format) * IPV6_HDRLEN;
@@ -174,8 +182,8 @@ hicn_packet_get_header_length_from_format (hicn_format_t format,
 }
 
 int
-hicn_packet_get_header_length (hicn_format_t format, const hicn_header_t * h,
-			       size_t * header_length)
+hicn_packet_get_header_length (hicn_format_t format, const hicn_header_t *h,
+			       size_t *header_length)
 {
   hicn_packet_get_header_length_from_format (format, header_length);
   int is_ah = _is_ah (format);
@@ -184,15 +192,15 @@ hicn_packet_get_header_length (hicn_format_t format, const hicn_header_t * h,
   // The signature payload is expressed as number of 32 bits words
   if (is_ah && is_ipv4)
     *header_length += (h->v4ah.ah.payloadlen) << 2;
-  else if(is_ah && is_ipv6)
+  else if (is_ah && is_ipv6)
     *header_length += (h->v6ah.ah.payloadlen) << 2;
 
   return HICN_LIB_ERROR_NONE;
 }
 
 int
-hicn_packet_get_payload_length (hicn_format_t format, const hicn_header_t * h,
-				size_t * payload_length)
+hicn_packet_get_payload_length (hicn_format_t format, const hicn_header_t *h,
+				size_t *payload_length)
 {
   hicn_type_t type = hicn_format_to_type (format);
   return hicn_ops_vft[type.l1]->get_payload_length (type, &h->protocol,
@@ -200,7 +208,7 @@ hicn_packet_get_payload_length (hicn_format_t format, const hicn_header_t * h,
 }
 
 int
-hicn_packet_set_payload_length (hicn_format_t format, hicn_header_t * h,
+hicn_packet_set_payload_length (hicn_format_t format, hicn_header_t *h,
 				const size_t payload_length)
 {
   hicn_type_t type = hicn_format_to_type (format);
@@ -209,8 +217,8 @@ hicn_packet_set_payload_length (hicn_format_t format, hicn_header_t * h,
 }
 
 int
-hicn_packet_compare (const hicn_header_t * packet1,
-		     const hicn_header_t * packet2)
+hicn_packet_compare (const hicn_header_t *packet1,
+		     const hicn_header_t *packet2)
 {
   hicn_type_t type1 = hicn_header_to_type (packet1);
   hicn_type_t type2 = hicn_header_to_type (packet2);
@@ -233,25 +241,23 @@ hicn_packet_compare (const hicn_header_t * packet1,
     return HICN_LIB_ERROR_UNEXPECTED;
 
   return memcmp ((u8 *) packet1, (u8 *) packet2, len1);
-
 }
 
 int
-hicn_packet_get_name (hicn_format_t format, const hicn_header_t * h,
-		      hicn_name_t * name, u8 is_interest)
+hicn_packet_get_name (hicn_format_t format, const hicn_header_t *h,
+		      hicn_name_t *name, u8 is_interest)
 {
   hicn_type_t type = hicn_format_to_type (format);
 
   if (is_interest)
-    return hicn_ops_vft[type.l1]->get_interest_name (type, &h->protocol,
-						     name);
+    return hicn_ops_vft[type.l1]->get_interest_name (type, &h->protocol, name);
   else
     return hicn_ops_vft[type.l1]->get_data_name (type, &h->protocol, name);
 }
 
 int
-hicn_packet_set_name (hicn_format_t format, hicn_header_t * h,
-		      const hicn_name_t * name, u8 is_interest)
+hicn_packet_set_name (hicn_format_t format, hicn_header_t *h,
+		      const hicn_name_t *name, u8 is_interest)
 {
   hicn_type_t type = hicn_format_to_type (format);
 
@@ -261,23 +267,21 @@ hicn_packet_set_name (hicn_format_t format, hicn_header_t * h,
 #endif /* HICN_VPP_PLUGIN */
 
   if (is_interest)
-    return hicn_ops_vft[type.l1]->set_interest_name (type, &h->protocol,
-						     name);
+    return hicn_ops_vft[type.l1]->set_interest_name (type, &h->protocol, name);
   else
     return hicn_ops_vft[type.l1]->set_data_name (type, &h->protocol, name);
 }
 
 int
-hicn_packet_set_payload (hicn_format_t format, hicn_header_t * h,
-			 const u8 * payload, u16 payload_length)
+hicn_packet_set_payload (hicn_format_t format, hicn_header_t *h,
+			 const u8 *payload, u16 payload_length)
 {
   hicn_type_t type = hicn_format_to_type (format);
   size_t header_length;
   int rc;
 
-  rc =
-    hicn_ops_vft[type.l1]->get_header_length (type, &h->protocol,
-					      &header_length);
+  rc = hicn_ops_vft[type.l1]->get_header_length (type, &h->protocol,
+						 &header_length);
   if (rc < 0)
     return rc;
 
@@ -288,22 +292,20 @@ hicn_packet_set_payload (hicn_format_t format, hicn_header_t * h,
 }
 
 int
-hicn_packet_get_payload (hicn_format_t format, const hicn_header_t * h,
-			 u8 ** payload, size_t * payload_size, bool hard_copy)
+hicn_packet_get_payload (hicn_format_t format, const hicn_header_t *h,
+			 u8 **payload, size_t *payload_size, bool hard_copy)
 {
   size_t header_length, payload_length;
   int rc;
   hicn_type_t type = hicn_format_to_type (format);
 
-  rc =
-    hicn_ops_vft[type.l1]->get_header_length (type, &h->protocol,
-					      &header_length);
+  rc = hicn_ops_vft[type.l1]->get_header_length (type, &h->protocol,
+						 &header_length);
   if (rc < 0)
     return rc;
 
-  rc =
-    hicn_ops_vft[type.l1]->get_payload_length (type, &h->protocol,
-					       &payload_length);
+  rc = hicn_ops_vft[type.l1]->get_payload_length (type, &h->protocol,
+						  &payload_length);
   if (rc < 0)
     return rc;
 
@@ -320,23 +322,21 @@ hicn_packet_get_payload (hicn_format_t format, const hicn_header_t * h,
 }
 
 int
-hicn_packet_get_locator (hicn_format_t format, const hicn_header_t * h,
-			 ip_address_t * address, bool is_interest)
+hicn_packet_get_locator (hicn_format_t format, const hicn_header_t *h,
+			 ip_address_t *address, bool is_interest)
 {
   int is_ipv4 = (format & HFO_INET);
   int is_ipv6 = (format & HFO_INET6) >> 1;
 
   if (is_ipv4)
     {
-      address->v4.as_inaddr = is_interest
-          ? h->v4.ip.saddr.as_inaddr
-          : h->v4.ip.daddr.as_inaddr;
+      address->v4.as_inaddr =
+	is_interest ? h->v4.ip.saddr.as_inaddr : h->v4.ip.daddr.as_inaddr;
     }
   else if (is_ipv6)
     {
-      address->v6.as_in6addr = is_interest
-          ? h->v6.ip.saddr.as_in6addr
-          : h->v6.ip.daddr.as_in6addr;
+      address->v6.as_in6addr =
+	is_interest ? h->v6.ip.saddr.as_in6addr : h->v6.ip.daddr.as_in6addr;
     }
   else
     {
@@ -347,25 +347,25 @@ hicn_packet_get_locator (hicn_format_t format, const hicn_header_t * h,
 }
 
 int
-hicn_packet_set_locator (hicn_format_t format, hicn_header_t * h,
-			 const ip_address_t * address, bool is_interest)
+hicn_packet_set_locator (hicn_format_t format, hicn_header_t *h,
+			 const ip_address_t *address, bool is_interest)
 {
   int is_ipv4 = (format & HFO_INET);
   int is_ipv6 = (format & HFO_INET6) >> 1;
 
   if (is_ipv6)
     {
-        if (is_interest)
-            h->v6.ip.saddr.as_in6addr = address->v6.as_in6addr;
-        else
-            h->v6.ip.daddr.as_in6addr = address->v6.as_in6addr;
+      if (is_interest)
+	h->v6.ip.saddr.as_in6addr = address->v6.as_in6addr;
+      else
+	h->v6.ip.daddr.as_in6addr = address->v6.as_in6addr;
     }
   else if (is_ipv4)
     {
-        if (is_interest)
-            h->v4.ip.saddr.as_inaddr = address->v4.as_inaddr;
-        else
-            h->v4.ip.daddr.as_inaddr = address->v4.as_inaddr;
+      if (is_interest)
+	h->v4.ip.saddr.as_inaddr = address->v4.as_inaddr;
+      else
+	h->v4.ip.daddr.as_inaddr = address->v4.as_inaddr;
     }
   else
     {
@@ -376,79 +376,78 @@ hicn_packet_set_locator (hicn_format_t format, hicn_header_t * h,
 }
 
 int
-hicn_packet_get_signature_size (hicn_format_t format, const hicn_header_t * h,
-				size_t * bytes)
+hicn_packet_get_signature_size (hicn_format_t format, const hicn_header_t *h,
+				size_t *bytes)
 {
   hicn_type_t type = hicn_format_to_type (format);
-  return hicn_ops_vft[type.l1]->get_signature_size (type, &h->protocol,
-						    bytes);
+  return hicn_ops_vft[type.l1]->get_signature_size (type, &h->protocol, bytes);
 }
 
 int
-hicn_packet_set_signature_size (hicn_format_t format, hicn_header_t * h,
+hicn_packet_set_signature_size (hicn_format_t format, hicn_header_t *h,
 				size_t bytes)
 {
   hicn_type_t type = hicn_format_to_type (format);
-  return hicn_ops_vft[type.l1]->set_signature_size (type, &h->protocol,
-						    bytes);
+  return hicn_ops_vft[type.l1]->set_signature_size (type, &h->protocol, bytes);
 }
 
 int
-hicn_packet_set_signature_timestamp (hicn_format_t format, hicn_header_t * h,
-				uint64_t signature_timestamp)
+hicn_packet_set_signature_timestamp (hicn_format_t format, hicn_header_t *h,
+				     uint64_t signature_timestamp)
 {
   hicn_type_t type = hicn_format_to_type (format);
   return hicn_ops_vft[type.l1]->set_signature_timestamp (type, &h->protocol,
-						    signature_timestamp);
+							 signature_timestamp);
 }
 
 int
-hicn_packet_get_signature_timestamp (hicn_format_t format, const hicn_header_t * h,
-				uint64_t *signature_timestamp)
+hicn_packet_get_signature_timestamp (hicn_format_t format,
+				     const hicn_header_t *h,
+				     uint64_t *signature_timestamp)
 {
   hicn_type_t type = hicn_format_to_type (format);
   return hicn_ops_vft[type.l1]->get_signature_timestamp (type, &h->protocol,
-						    signature_timestamp);
+							 signature_timestamp);
 }
 
 int
-hicn_packet_set_validation_algorithm (hicn_format_t format, hicn_header_t * h,
-				uint8_t validation_algorithm)
+hicn_packet_set_validation_algorithm (hicn_format_t format, hicn_header_t *h,
+				      uint8_t validation_algorithm)
 {
   hicn_type_t type = hicn_format_to_type (format);
-  return hicn_ops_vft[type.l1]->set_validation_algorithm (type, &h->protocol,
-						    validation_algorithm);
+  return hicn_ops_vft[type.l1]->set_validation_algorithm (
+    type, &h->protocol, validation_algorithm);
 }
 
 int
-hicn_packet_get_validation_algorithm (hicn_format_t format, const hicn_header_t * h,
-				uint8_t * validation_algorithm)
+hicn_packet_get_validation_algorithm (hicn_format_t format,
+				      const hicn_header_t *h,
+				      uint8_t *validation_algorithm)
 {
   hicn_type_t type = hicn_format_to_type (format);
-  return hicn_ops_vft[type.l1]->get_validation_algorithm (type, &h->protocol,
-						    validation_algorithm);
+  return hicn_ops_vft[type.l1]->get_validation_algorithm (
+    type, &h->protocol, validation_algorithm);
 }
 
 int
-hicn_packet_set_key_id (hicn_format_t format, hicn_header_t * h,
-				uint8_t *key_id)
+hicn_packet_set_key_id (hicn_format_t format, hicn_header_t *h,
+			uint8_t *key_id)
 {
   hicn_type_t type = hicn_format_to_type (format);
-  return hicn_ops_vft[type.l1]->set_key_id (type, &h->protocol,
-						    key_id);
+  return hicn_ops_vft[type.l1]->set_key_id (type, &h->protocol, key_id);
 }
 
 int
-hicn_packet_get_key_id (hicn_format_t format, hicn_header_t * h,
-				uint8_t ** key_id, uint8_t *key_id_length)
+hicn_packet_get_key_id (hicn_format_t format, hicn_header_t *h,
+			uint8_t **key_id, uint8_t *key_id_length)
 {
   hicn_type_t type = hicn_format_to_type (format);
-  return hicn_ops_vft[type.l1]->get_key_id (type, &h->protocol,
-						    key_id, key_id_length);
+  return hicn_ops_vft[type.l1]->get_key_id (type, &h->protocol, key_id,
+					    key_id_length);
 }
 
 int
-hicn_packet_get_hoplimit (const hicn_header_t * h, u8 * hops)
+hicn_packet_get_hoplimit (const hicn_header_t *h, u8 *hops)
 {
   switch (HICN_IP_VERSION (h))
     {
@@ -466,7 +465,7 @@ hicn_packet_get_hoplimit (const hicn_header_t * h, u8 * hops)
 }
 
 int
-hicn_packet_set_hoplimit (hicn_header_t * h, u8 hops)
+hicn_packet_set_hoplimit (hicn_header_t *h, u8 hops)
 {
   switch (HICN_IP_VERSION (h))
     {
@@ -483,9 +482,8 @@ hicn_packet_set_hoplimit (hicn_header_t * h, u8 hops)
   return HICN_LIB_ERROR_NONE;
 }
 
-
 int
-hicn_packet_get_lifetime (const hicn_header_t * h, u32 * lifetime)
+hicn_packet_get_lifetime (const hicn_header_t *h, u32 *lifetime)
 {
   hicn_type_t type = hicn_header_to_type (h);
   return hicn_ops_vft[type.l1]->get_lifetime (type, &h->protocol,
@@ -493,7 +491,7 @@ hicn_packet_get_lifetime (const hicn_header_t * h, u32 * lifetime)
 }
 
 int
-hicn_packet_set_lifetime (hicn_header_t * h, u32 lifetime)
+hicn_packet_set_lifetime (hicn_header_t *h, u32 lifetime)
 {
   hicn_type_t type = hicn_header_to_type (h);
   return hicn_ops_vft[type.l1]->set_lifetime (type, &h->protocol,
@@ -501,15 +499,15 @@ hicn_packet_set_lifetime (hicn_header_t * h, u32 lifetime)
 }
 
 int
-hicn_packet_get_reserved_bits (const hicn_header_t * h, u8 * reserved_bits)
+hicn_packet_get_reserved_bits (const hicn_header_t *h, u8 *reserved_bits)
 {
   switch (HICN_IP_VERSION (h))
     {
     case 6:
-      *reserved_bits = (u8)(h->v6.tcp.reserved);
+      *reserved_bits = (u8) (h->v6.tcp.reserved);
       break;
     case 4:
-      *reserved_bits = (u8)(h->v4.tcp.reserved);
+      *reserved_bits = (u8) (h->v4.tcp.reserved);
       break;
     default:
       return HICN_LIB_ERROR_UNEXPECTED;
@@ -519,7 +517,7 @@ hicn_packet_get_reserved_bits (const hicn_header_t * h, u8 * reserved_bits)
 }
 
 int
-hicn_packet_set_reserved_bits (hicn_header_t * h, const u8 reserved_bits)
+hicn_packet_set_reserved_bits (hicn_header_t *h, const u8 reserved_bits)
 {
   switch (HICN_IP_VERSION (h))
     {
@@ -537,16 +535,18 @@ hicn_packet_set_reserved_bits (hicn_header_t * h, const u8 reserved_bits)
 }
 
 int
-hicn_packet_get_payload_type (const hicn_header_t * h,
-			      hicn_payload_type_t * payload_type)
+hicn_packet_get_payload_type (const hicn_header_t *h,
+			      hicn_payload_type_t *payload_type)
 {
   switch (HICN_IP_VERSION (h))
     {
     case 6:
-      *payload_type = ((h->v6.tcp.flags & HICN_TCP_FLAG_URG) == HICN_TCP_FLAG_URG);
+      *payload_type =
+	((h->v6.tcp.flags & HICN_TCP_FLAG_URG) == HICN_TCP_FLAG_URG);
       break;
     case 4:
-      *payload_type = ((h->v4.tcp.flags & HICN_TCP_FLAG_URG) == HICN_TCP_FLAG_URG);
+      *payload_type =
+	((h->v4.tcp.flags & HICN_TCP_FLAG_URG) == HICN_TCP_FLAG_URG);
       break;
     default:
       return HICN_LIB_ERROR_UNEXPECTED;
@@ -561,7 +561,7 @@ hicn_packet_get_payload_type (const hicn_header_t * h,
 }
 
 int
-hicn_packet_set_payload_type (hicn_header_t * h,
+hicn_packet_set_payload_type (hicn_header_t *h,
 			      hicn_payload_type_t payload_type)
 {
   if (payload_type != HPT_DATA && payload_type != HPT_MANIFEST)
@@ -591,8 +591,13 @@ hicn_packet_set_payload_type (hicn_header_t * h,
 }
 
 int
-hicn_packet_set_syn (hicn_header_t * h)
+hicn_packet_set_syn (hicn_format_t format, hicn_header_t *h)
 {
+  if (!_is_tcp (format))
+    {
+      return HICN_LIB_ERROR_UNEXPECTED;
+    }
+
   switch (HICN_IP_VERSION (h))
     {
     case 6:
@@ -608,8 +613,13 @@ hicn_packet_set_syn (hicn_header_t * h)
 }
 
 int
-hicn_packet_reset_syn (hicn_header_t * h)
+hicn_packet_reset_syn (hicn_format_t format, hicn_header_t *h)
 {
+  if (!_is_tcp (format))
+    {
+      return HICN_LIB_ERROR_UNEXPECTED;
+    }
+
   switch (HICN_IP_VERSION (h))
     {
     case 6:
@@ -625,8 +635,13 @@ hicn_packet_reset_syn (hicn_header_t * h)
 }
 
 int
-hicn_packet_test_syn (const hicn_header_t * h, bool * flag)
+hicn_packet_test_syn (hicn_format_t format, const hicn_header_t *h, bool *flag)
 {
+  if (!_is_tcp (format))
+    {
+      return HICN_LIB_ERROR_UNEXPECTED;
+    }
+
   switch (HICN_IP_VERSION (h))
     {
     case 6:
@@ -642,8 +657,13 @@ hicn_packet_test_syn (const hicn_header_t * h, bool * flag)
 }
 
 int
-hicn_packet_set_ack (hicn_header_t * h)
+hicn_packet_set_ack (hicn_format_t format, hicn_header_t *h)
 {
+  if (!_is_tcp (format))
+    {
+      return HICN_LIB_ERROR_UNEXPECTED;
+    }
+
   switch (HICN_IP_VERSION (h))
     {
     case 6:
@@ -659,8 +679,13 @@ hicn_packet_set_ack (hicn_header_t * h)
 }
 
 int
-hicn_packet_reset_ack (hicn_header_t * h)
+hicn_packet_reset_ack (hicn_format_t format, hicn_header_t *h)
 {
+  if (!_is_tcp (format))
+    {
+      return HICN_LIB_ERROR_UNEXPECTED;
+    }
+
   switch (HICN_IP_VERSION (h))
     {
     case 6:
@@ -676,8 +701,13 @@ hicn_packet_reset_ack (hicn_header_t * h)
 }
 
 int
-hicn_packet_test_ack (const hicn_header_t * h, bool * flag)
+hicn_packet_test_ack (hicn_format_t format, const hicn_header_t *h, bool *flag)
 {
+  if (!_is_tcp (format))
+    {
+      return HICN_LIB_ERROR_UNEXPECTED;
+    }
+
   switch (HICN_IP_VERSION (h))
     {
     case 6:
@@ -693,8 +723,13 @@ hicn_packet_test_ack (const hicn_header_t * h, bool * flag)
 }
 
 int
-hicn_packet_set_rst (hicn_header_t * h)
+hicn_packet_set_rst (hicn_format_t format, hicn_header_t *h)
 {
+  if (!_is_tcp (format))
+    {
+      return HICN_LIB_ERROR_UNEXPECTED;
+    }
+
   switch (HICN_IP_VERSION (h))
     {
     case 6:
@@ -710,8 +745,13 @@ hicn_packet_set_rst (hicn_header_t * h)
 }
 
 int
-hicn_packet_reset_rst (hicn_header_t * h)
+hicn_packet_reset_rst (hicn_format_t format, hicn_header_t *h)
 {
+  if (!_is_tcp (format))
+    {
+      return HICN_LIB_ERROR_UNEXPECTED;
+    }
+
   switch (HICN_IP_VERSION (h))
     {
     case 6:
@@ -727,8 +767,13 @@ hicn_packet_reset_rst (hicn_header_t * h)
 }
 
 int
-hicn_packet_test_rst (const hicn_header_t * h, bool * flag)
+hicn_packet_test_rst (hicn_format_t format, const hicn_header_t *h, bool *flag)
 {
+  if (!_is_tcp (format))
+    {
+      return HICN_LIB_ERROR_UNEXPECTED;
+    }
+
   switch (HICN_IP_VERSION (h))
     {
     case 6:
@@ -744,8 +789,13 @@ hicn_packet_test_rst (const hicn_header_t * h, bool * flag)
 }
 
 int
-hicn_packet_set_fin (hicn_header_t * h)
+hicn_packet_set_fin (hicn_format_t format, hicn_header_t *h)
 {
+  if (!_is_tcp (format))
+    {
+      return HICN_LIB_ERROR_UNEXPECTED;
+    }
+
   switch (HICN_IP_VERSION (h))
     {
     case 6:
@@ -761,8 +811,13 @@ hicn_packet_set_fin (hicn_header_t * h)
 }
 
 int
-hicn_packet_reset_fin (hicn_header_t * h)
+hicn_packet_reset_fin (hicn_format_t format, hicn_header_t *h)
 {
+  if (!_is_tcp (format))
+    {
+      return HICN_LIB_ERROR_UNEXPECTED;
+    }
+
   switch (HICN_IP_VERSION (h))
     {
     case 6:
@@ -778,8 +833,13 @@ hicn_packet_reset_fin (hicn_header_t * h)
 }
 
 int
-hicn_packet_test_fin (const hicn_header_t * h, bool * flag)
+hicn_packet_test_fin (hicn_format_t format, const hicn_header_t *h, bool *flag)
 {
+  if (!_is_tcp (format))
+    {
+      return HICN_LIB_ERROR_UNEXPECTED;
+    }
+
   switch (HICN_IP_VERSION (h))
     {
     case 6:
@@ -795,8 +855,13 @@ hicn_packet_test_fin (const hicn_header_t * h, bool * flag)
 }
 
 int
-hicn_packet_set_ece (hicn_header_t * h)
+hicn_packet_set_ece (hicn_format_t format, hicn_header_t *h)
 {
+  if (!_is_tcp (format))
+    {
+      return HICN_LIB_ERROR_UNEXPECTED;
+    }
+
   switch (HICN_IP_VERSION (h))
     {
     case 6:
@@ -812,8 +877,13 @@ hicn_packet_set_ece (hicn_header_t * h)
 }
 
 int
-hicn_packet_reset_ece (hicn_header_t * h)
+hicn_packet_reset_ece (hicn_format_t format, hicn_header_t *h)
 {
+  if (!_is_tcp (format))
+    {
+      return HICN_LIB_ERROR_UNEXPECTED;
+    }
+
   switch (HICN_IP_VERSION (h))
     {
     case 6:
@@ -829,8 +899,13 @@ hicn_packet_reset_ece (hicn_header_t * h)
 }
 
 int
-hicn_packet_test_ece (const hicn_header_t * h, bool * flag)
+hicn_packet_test_ece (hicn_format_t format, const hicn_header_t *h, bool *flag)
 {
+  if (!_is_tcp (format))
+    {
+      return HICN_LIB_ERROR_UNEXPECTED;
+    }
+
   switch (HICN_IP_VERSION (h))
     {
     case 6:
@@ -846,8 +921,13 @@ hicn_packet_test_ece (const hicn_header_t * h, bool * flag)
 }
 
 int
-hicn_packet_set_src_port (hicn_header_t * h, u16 src_port)
+hicn_packet_set_src_port (hicn_format_t format, hicn_header_t *h, u16 src_port)
 {
+  if (!_is_tcp (format))
+    {
+      return HICN_LIB_ERROR_UNEXPECTED;
+    }
+
   switch (HICN_IP_VERSION (h))
     {
     case 6:
@@ -863,8 +943,14 @@ hicn_packet_set_src_port (hicn_header_t * h, u16 src_port)
 }
 
 int
-hicn_packet_get_src_port (const hicn_header_t * h, u16 * src_port)
+hicn_packet_get_src_port (hicn_format_t format, const hicn_header_t *h,
+			  u16 *src_port)
 {
+  if (!_is_tcp (format))
+    {
+      return HICN_LIB_ERROR_UNEXPECTED;
+    }
+
   switch (HICN_IP_VERSION (h))
     {
     case 6:
@@ -880,8 +966,13 @@ hicn_packet_get_src_port (const hicn_header_t * h, u16 * src_port)
 }
 
 int
-hicn_packet_set_dst_port (hicn_header_t * h, u16 dst_port)
+hicn_packet_set_dst_port (hicn_format_t format, hicn_header_t *h, u16 dst_port)
 {
+  if (!_is_tcp (format))
+    {
+      return HICN_LIB_ERROR_UNEXPECTED;
+    }
+
   switch (HICN_IP_VERSION (h))
     {
     case 6:
@@ -897,8 +988,14 @@ hicn_packet_set_dst_port (hicn_header_t * h, u16 dst_port)
 }
 
 int
-hicn_packet_get_dst_port (const hicn_header_t * h, u16 * dst_port)
+hicn_packet_get_dst_port (hicn_format_t format, const hicn_header_t *h,
+			  u16 *dst_port)
 {
+  if (!_is_tcp (format))
+    {
+      return HICN_LIB_ERROR_UNEXPECTED;
+    }
+
   switch (HICN_IP_VERSION (h))
     {
     case 6:
@@ -914,8 +1011,8 @@ hicn_packet_get_dst_port (const hicn_header_t * h, u16 * dst_port)
 }
 
 int
-hicn_packet_copy_header (hicn_format_t format, const hicn_header_t * packet,
-			 hicn_header_t * destination, bool copy_ah)
+hicn_packet_copy_header (hicn_format_t format, const hicn_header_t *packet,
+			 hicn_header_t *destination, bool copy_ah)
 {
   size_t header_length = _is_ipv4 (format) * IPV4_HDRLEN;
   header_length += _is_ipv6 (format) * IPV6_HDRLEN;
@@ -929,95 +1026,95 @@ hicn_packet_copy_header (hicn_format_t format, const hicn_header_t * packet,
 }
 
 #define _INTEREST 1
-#define _DATA     0
+#define _DATA	  0
 
 /* Interest */
 
 int
-hicn_interest_get_name (hicn_format_t format, const hicn_header_t * interest,
-			hicn_name_t * name)
+hicn_interest_get_name (hicn_format_t format, const hicn_header_t *interest,
+			hicn_name_t *name)
 {
   return hicn_packet_get_name (format, interest, name, _INTEREST);
 }
 
 int
-hicn_interest_set_name (hicn_format_t format, hicn_header_t * interest,
-			const hicn_name_t * name)
+hicn_interest_set_name (hicn_format_t format, hicn_header_t *interest,
+			const hicn_name_t *name)
 {
-  int ret_err = hicn_packet_reset_ece (interest);	//interest packet -> ece flag unset
+  int ret_err =
+    hicn_packet_reset_ece (format, interest); // interest packet -> ece flag unset
   if (ret_err < 0)
     return HICN_LIB_ERROR_UNEXPECTED;
   return hicn_packet_set_name (format, interest, name, _INTEREST);
 }
 
 int
-hicn_interest_get_locator (hicn_format_t format,
-			   const hicn_header_t * interest,
-			   ip_address_t * address)
+hicn_interest_get_locator (hicn_format_t format, const hicn_header_t *interest,
+			   ip_address_t *address)
 {
   return hicn_packet_get_locator (format, interest, address, _INTEREST);
 }
 
 int
-hicn_interest_set_locator (hicn_format_t format, hicn_header_t * interest,
-			   const ip_address_t * address)
+hicn_interest_set_locator (hicn_format_t format, hicn_header_t *interest,
+			   const ip_address_t *address)
 {
   return hicn_packet_set_locator (format, interest, address, _INTEREST);
 }
 
 int
-hicn_interest_compare (const hicn_header_t * interest_1,
-		       const hicn_header_t * interest_2)
+hicn_interest_compare (const hicn_header_t *interest_1,
+		       const hicn_header_t *interest_2)
 {
   return hicn_packet_compare (interest_1, interest_2);
 }
 
 int
-hicn_interest_get_lifetime (const hicn_header_t * interest, u32 * lifetime)
+hicn_interest_get_lifetime (const hicn_header_t *interest, u32 *lifetime)
 {
   return hicn_packet_get_lifetime (interest, lifetime);
 }
 
 int
-hicn_interest_set_lifetime (hicn_header_t * interest, u32 lifetime)
+hicn_interest_set_lifetime (hicn_header_t *interest, u32 lifetime)
 {
   return hicn_packet_set_lifetime (interest, lifetime);
 }
 
 int
 hicn_interest_get_header_length (hicn_format_t format,
-				 const hicn_header_t * interest,
-				 size_t * header_length)
+				 const hicn_header_t *interest,
+				 size_t *header_length)
 {
   return hicn_packet_get_header_length (format, interest, header_length);
 }
 
 int
 hicn_interest_get_payload_length (hicn_format_t format,
-				  const hicn_header_t * interest,
-				  size_t * payload_length)
+				  const hicn_header_t *interest,
+				  size_t *payload_length)
 {
   return hicn_packet_get_payload_length (format, interest, payload_length);
 }
 
 int
-hicn_interest_get_payload (hicn_format_t format,
-			   const hicn_header_t * interest, u8 ** payload,
-			   size_t * payload_size, bool hard_copy)
+hicn_interest_get_payload (hicn_format_t format, const hicn_header_t *interest,
+			   u8 **payload, size_t *payload_size, bool hard_copy)
 {
   return hicn_packet_get_payload (format, interest, payload, payload_size,
 				  hard_copy);
 }
 
 int
-hicn_interest_set_payload (hicn_format_t format, hicn_header_t * interest,
-			   const u8 * payload, size_t payload_length)
+hicn_interest_set_payload (hicn_format_t format, hicn_header_t *interest,
+			   const u8 *payload, size_t payload_length)
 {
-  return hicn_packet_set_payload (format, interest, payload, (u16)payload_length);
+  return hicn_packet_set_payload (format, interest, payload,
+				  (u16) payload_length);
 }
 
 int
-hicn_interest_reset_for_hash (hicn_format_t format, hicn_header_t * packet)
+hicn_interest_reset_for_hash (hicn_format_t format, hicn_header_t *packet)
 {
   hicn_type_t type = hicn_format_to_type (format);
   return hicn_ops_vft[type.l1]->reset_interest_for_hash (type,
@@ -1027,85 +1124,84 @@ hicn_interest_reset_for_hash (hicn_format_t format, hicn_header_t * packet)
 /* Data */
 
 int
-hicn_data_get_name (hicn_format_t format, const hicn_header_t * data,
-		    hicn_name_t * name)
+hicn_data_get_name (hicn_format_t format, const hicn_header_t *data,
+		    hicn_name_t *name)
 {
   return hicn_packet_get_name (format, data, name, _DATA);
 }
 
 int
-hicn_data_set_name (hicn_format_t format, hicn_header_t * data,
-		    const hicn_name_t * name)
+hicn_data_set_name (hicn_format_t format, hicn_header_t *data,
+		    const hicn_name_t *name)
 {
-  int ret_err = hicn_packet_set_ece (data);	//data packet -> ece flag set
+  int ret_err = hicn_packet_set_ece (format, data); // data packet -> ece flag set
   if (ret_err < 0)
     return HICN_LIB_ERROR_UNEXPECTED;
   return hicn_packet_set_name (format, data, name, _DATA);
 }
 
 int
-hicn_data_get_locator (hicn_format_t format, const hicn_header_t * data,
-		       ip_address_t * address)
+hicn_data_get_locator (hicn_format_t format, const hicn_header_t *data,
+		       ip_address_t *address)
 {
   return hicn_packet_get_locator (format, data, address, _DATA);
 }
 
 int
-hicn_data_set_locator (hicn_format_t format, hicn_header_t * data,
-		       const ip_address_t * address)
+hicn_data_set_locator (hicn_format_t format, hicn_header_t *data,
+		       const ip_address_t *address)
 {
   return hicn_packet_set_locator (format, data, address, _DATA);
 }
 
 int
-hicn_data_compare (const hicn_header_t * data_1, const hicn_header_t * data_2)
+hicn_data_compare (const hicn_header_t *data_1, const hicn_header_t *data_2)
 {
   return hicn_packet_compare (data_1, data_2);
 }
 
 int
-hicn_data_get_expiry_time (const hicn_header_t * data, u32 * expiry_time)
+hicn_data_get_expiry_time (const hicn_header_t *data, u32 *expiry_time)
 {
   return hicn_packet_get_lifetime (data, expiry_time);
 }
 
 int
-hicn_data_set_expiry_time (hicn_header_t * data, u32 expiry_time)
+hicn_data_set_expiry_time (hicn_header_t *data, u32 expiry_time)
 {
   return hicn_packet_set_lifetime (data, (hicn_lifetime_t) expiry_time);
 }
 
 int
-hicn_data_get_header_length (hicn_format_t format, hicn_header_t * data,
-			     size_t * header_length)
+hicn_data_get_header_length (hicn_format_t format, hicn_header_t *data,
+			     size_t *header_length)
 {
   return hicn_packet_get_header_length (format, data, header_length);
 }
 
 int
-hicn_data_get_payload_length (hicn_format_t format,
-			      const hicn_header_t * data,
-			      size_t * payload_length)
+hicn_data_get_payload_length (hicn_format_t format, const hicn_header_t *data,
+			      size_t *payload_length)
 {
   return hicn_packet_get_payload_length (format, data, payload_length);
 }
 
 int
-hicn_data_set_payload_type (hicn_header_t * data,
+hicn_data_set_payload_type (hicn_header_t *data,
 			    hicn_payload_type_t payload_type)
 {
   return hicn_packet_set_payload_type (data, payload_type);
 }
 
 int
-hicn_data_get_payload_type (const hicn_header_t * data,
-			    hicn_payload_type_t * payload_type)
+hicn_data_get_payload_type (const hicn_header_t *data,
+			    hicn_payload_type_t *payload_type)
 {
   return hicn_packet_get_payload_type (data, payload_type);
 }
 
 int
-hicn_data_get_path_label (const hicn_header_t * data, u32 * path_label)
+hicn_data_get_path_label (const hicn_header_t *data, u32 *path_label)
 {
   hicn_type_t type = hicn_header_to_type (data);
   return hicn_ops_vft[type.l1]->get_data_pathlabel (type, &data->protocol,
@@ -1113,7 +1209,7 @@ hicn_data_get_path_label (const hicn_header_t * data, u32 * path_label)
 }
 
 int
-hicn_data_set_path_label (hicn_header_t * data, u32 path_label)
+hicn_data_set_path_label (hicn_header_t *data, u32 path_label)
 {
   hicn_type_t type = hicn_header_to_type (data);
   return hicn_ops_vft[type.l1]->set_data_pathlabel (type, &data->protocol,
@@ -1121,34 +1217,34 @@ hicn_data_set_path_label (hicn_header_t * data, u32 path_label)
 }
 
 int
-hicn_data_set_payload (hicn_format_t format, hicn_header_t * data,
-		       const u8 * payload, size_t payload_length)
+hicn_data_set_payload (hicn_format_t format, hicn_header_t *data,
+		       const u8 *payload, size_t payload_length)
 {
-  return hicn_packet_set_payload (format, data, payload, (u16)payload_length);
+  return hicn_packet_set_payload (format, data, payload, (u16) payload_length);
 }
 
 int
-hicn_data_get_payload (hicn_format_t format, const hicn_header_t * data,
-		       u8 ** payload, size_t * payload_size, bool hard_copy)
+hicn_data_get_payload (hicn_format_t format, const hicn_header_t *data,
+		       u8 **payload, size_t *payload_size, bool hard_copy)
 {
   return hicn_packet_get_payload (format, data, payload, payload_size,
 				  hard_copy);
 }
 
 int
-hicn_data_reset_for_hash (hicn_format_t format, hicn_header_t * packet)
+hicn_data_reset_for_hash (hicn_format_t format, hicn_header_t *packet)
 {
   hicn_type_t type = hicn_format_to_type (format);
-  return hicn_ops_vft[type.l1]->reset_data_for_hash (type,
-							 &packet->protocol);
-
+  return hicn_ops_vft[type.l1]->reset_data_for_hash (type, &packet->protocol);
 }
 
-int hicn_packet_get_signature(hicn_format_t format, hicn_header_t * packet, uint8_t ** sign_buf)
+int
+hicn_packet_get_signature (hicn_format_t format, hicn_header_t *packet,
+			   uint8_t **sign_buf)
 {
   hicn_type_t type = hicn_format_to_type (format);
-  return hicn_ops_vft[type.l1]->get_signature (type,
-							 &packet->protocol, sign_buf);
+  return hicn_ops_vft[type.l1]->get_signature (type, &packet->protocol,
+					       sign_buf);
 }
 
 /*
diff --git a/lib/src/name.c b/lib/src/name.c
index 9388c35e7..54b2a76aa 100644
--- a/lib/src/name.c
+++ b/lib/src/name.c
@@ -242,7 +242,7 @@ hicn_name_hash (const hicn_name_t * name, u32 * hash, bool consider_suffix)
 int
 hicn_name_empty (hicn_name_t * name)
 {
-  return name->type == HNT_UNSPEC ? HICN_LIB_ERROR_NONE : 1;
+  return name->type == HNT_UNSPEC ? 1 : 0;
 }
 
 int
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);