feat: add interest manifest serialization/deserialization

Also:
  add helpers for interest manifest

Ref: HICN-738

Signed-off-by: Mauro Sardara <msardara@cisco.com>
Change-Id: Ia531605148e00ccbe446da0f4f2d8caae2b098be
Signed-off-by: Mauro Sardara <msardara@cisco.com>

3 files changed, 22 insertions, 18 deletions

diff --git a/libtransport/includes/hicn/transport/core/interest.h b/libtransport/includes/hicn/transport/core/interest.h
index 23dc8f75e..716ac6b0a 100644
--- a/libtransport/includes/hicn/transport/core/interest.h
+++ b/libtransport/includes/hicn/transport/core/interest.h
@@ -92,6 +92,8 @@ class Interest
 
   void appendSuffix(std::uint32_t suffix);
 
+  void decodeSuffixes();
+
   void encodeSuffixes();
 
   uint32_t *firstSuffix();
diff --git a/libtransport/src/core/interest.cc b/libtransport/src/core/interest.cc
index 0851bfef6..777374b09 100644
--- a/libtransport/src/core/interest.cc
+++ b/libtransport/src/core/interest.cc
@@ -171,7 +171,7 @@ void Interest::encodeSuffixes() {
       (interest_manifest_header_t *)(writableData() + headerSize());
   int_manifest_header->n_suffixes = (uint32_t)suffix_set_.size();
   memset(int_manifest_header->request_bitmap, 0xFFFFFFFF,
-         BITMAP_SIZE * sizeof(u32));
+         BITMAP_SIZE * sizeof(hicn_uword));
 
   uint32_t *suffix = (uint32_t *)(int_manifest_header + 1);
   for (auto it = suffix_set_.begin(); it != suffix_set_.end(); it++, suffix++) {
@@ -181,10 +181,21 @@ void Interest::encodeSuffixes() {
   std::size_t additional_length =
       sizeof(interest_manifest_header_t) +
       int_manifest_header->n_suffixes * sizeof(uint32_t);
+
+  // Serialize interest manifest
+  interest_manifest_serialize(int_manifest_header);
+
   append(additional_length);
   updateLength();
 }
 
+void Interest::decodeSuffixes() {
+  if (!hasManifest()) return;
+
+  auto header = (interest_manifest_header_t *)(writableData() + headerSize());
+  interest_manifest_deserialize(header);
+}
+
 uint32_t *Interest::firstSuffix() {
   if (!hasManifest()) {
     return nullptr;
@@ -223,24 +234,8 @@ void Interest::setRequestBitmap(const uint32_t *request_bitmap) {
 
 bool Interest::isValid() {
   if (!hasManifest()) return true;
-
   auto header = (interest_manifest_header_t *)(writableData() + headerSize());
-
-  if (header->n_suffixes == 0 ||
-      header->n_suffixes > MAX_SUFFIXES_IN_MANIFEST) {
-    std::cerr << "Manifest with invalid number of suffixes "
-              << header->n_suffixes;
-    return false;
-  }
-
-  uint32_t empty_bitmap[BITMAP_SIZE];
-  memset(empty_bitmap, 0, sizeof(empty_bitmap));
-  if (memcmp(empty_bitmap, header->request_bitmap, sizeof(empty_bitmap)) == 0) {
-    std::cerr << "Manifest with empty bitmap";
-    return false;
-  }
-
-  return true;
+  return interest_manifest_is_valid(header, payloadSize());
 }
 
 }  // end namespace core
diff --git a/libtransport/src/test/test_interest.cc b/libtransport/src/test/test_interest.cc
index 8d00a9c6d..ba63b6c93 100644
--- a/libtransport/src/test/test_interest.cc
+++ b/libtransport/src/test/test_interest.cc
@@ -255,7 +255,11 @@ TEST_F(InterestTest, AppendSuffixesEncodeAndIterate) {
   // Encode them in wire format
   interest.encodeSuffixes();
 
+  // Decode suffixes from wire format
+  interest.decodeSuffixes();
+
   // Iterate over them. They should be in order and without repetitions
+
   auto suffix = interest.firstSuffix();
   auto n_suffixes = interest.numberOfSuffixes();
 
@@ -278,6 +282,9 @@ TEST_F(InterestTest, AppendSuffixesWithGaps) {
   interest.encodeSuffixes();
   EXPECT_TRUE(interest.hasManifest());
 
+  // Decode suffixes from wire format
+  interest.decodeSuffixes();
+
   // Check first suffix correctness
   auto suffix = interest.firstSuffix();
   EXPECT_NE(suffix, nullptr);