feat: Due to the deep modifications related to names and packet format,

this task cover a large part of the codebase and involves several changes:

- the library provides a name data structure (hicn_name_t ), which is composed
  of a name prefix (hicn_name_prefix_t) and a name suffix (hicn_name_suffix_t),
  and it has been extended to provide all support functions required for name
  manipulation, including common prefix computation, as required for the Longest
  Prefix Match (LPM)in the forwarder, in addition to Exact Prefix Match (EPM).
- all code has been rewritten to use this data structure instead of having for
  instance the forwarder define its own name class (used to be Name and NameBitVector)
  the code has been refactored to minimize name allocations and copies, one remaining
  aspect is the difference of name storage between PIT and CS entries (respectively
  in the PIT entry, and in the message buffer), which causes the packet cache
  index to be updated when a PIT entry is converted into a CS entry. By storing
  the name in the PIT/CS entry everytime, we might save on this operation).
- hicn-light FIB has been rewritten : code has been refactored and should now be
  shorter and documented; unit tests have been drafted but more would be required
  to cover all cases and match the algorithms to add/remove nodes, as specified in the doc.
  all protocol details and hICN header formats are now abstracted by the library
  for the forwarder (and thus header.h and  protocols/*.h have been removed from
  public includes, and replaced by packet.h providing protocol agnostic packet
  level functions, completely replacing the compat.h header that used to provide
  similar functions.
- this works by exposing a opaque buffer to the application (a kind of socket buffer)
  which is used by the lib to cache the packet format and offsets of the different
  layers in the buffer and provider efficient operations (the packet format is
  either defined for packet construction, or guessed at ingress, and this structure
  is updated accordingly only once).

Co-authored-by: Jordan Augé <jordan.auge+fdio@cisco.com>
Signed-off-by: Luca Muscariello <muscariello@ieee.org>
Change-Id: I31e321897f85f0267fe8ba4720363c180564492f

1 files changed, 41 insertions, 3 deletions

diff --git a/lib/includes/hicn/util/types.h b/lib/includes/hicn/util/types.h
index 50c5362d3..c9cc878cf 100644
--- a/lib/includes/hicn/util/types.h
+++ b/lib/includes/hicn/util/types.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021 Cisco and/or its affiliates.
+ * Copyright (c) 2021-2022 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:
@@ -19,11 +19,46 @@
 #include <hicn/util/windows/windows_Utils.h>
 #endif
 
+/* Standard types. */
+#include <stdint.h>
+
 typedef uint8_t u8;
 typedef uint16_t u16;
 typedef uint32_t u32;
 typedef uint64_t u64;
 
+typedef int8_t i8;
+typedef int16_t i16;
+typedef int32_t i32;
+typedef int64_t i64;
+
+typedef double f64;
+typedef float f32;
+
+/* Architecture-dependent uword size */
+#if INTPTR_MAX == INT64_MAX
+#define hicn_log2_uword_bits 6
+#elif INTPTR_MAX == INT32_MAX
+#define hicn_log2_uword_bits 5
+#else
+#error "Impossible to detect architecture"
+#endif
+
+#define hicn_uword_bits (1 << hicn_log2_uword_bits)
+
+/* Word types. */
+#if hicn_uword_bits == 64
+/* 64 bit word machines. */
+typedef u64 hicn_uword;
+#else
+/* 32 bit word machines. */
+typedef u32 hicn_uword;
+#endif
+
+typedef hicn_uword hicn_ip_csum_t;
+
+#define hicn_uword_bits (1 << hicn_log2_uword_bits)
+
 /* Helper for avoiding warnings about type-punning */
 #define UNION_CAST(x, destType)                                               \
   (((union {                                                                  \
@@ -32,12 +67,15 @@ typedef uint64_t u64;
    }) x)                                                                      \
      .b)
 
-// typedef unsigned int hash_t;
-
 typedef int (*cmp_t) (const void *, const void *);
 
 /* Enums */
 
 #define IS_VALID_ENUM_TYPE(NAME, x) ((x > NAME##_UNDEFINED) && (x < NAME##_N))
 
+/* Float */
+
+uint32_t htonf (float f);
+float ntohf (uint32_t i);
+
 #endif /* UTIL_TYPES */