Remove `NDPI_PROTOCOL_BITMASK`; add a new generic bitmask data structure (#2871)

The main difference is that the memory is allocated at runtime

Typical usercase:
```
struct ndpi_bitmask b;

ndpi_bitmask_alloc(&b, ndpi_get_num_internal_protocols());

ndpi_bitmask_set(&b, $BIT);
ndpi_bitmask_is_set(&b, $BIT);
[...]

ndpi_bitmask_dealloc(&b);

```

See #2136

1 files changed, 19 insertions, 1 deletions

diff --git a/src/include/ndpi_api.h b/src/include/ndpi_api.h
index 78ac1d605..e8b1b06b5 100644
--- a/src/include/ndpi_api.h
+++ b/src/include/ndpi_api.h
@@ -212,7 +212,7 @@ extern "C" {
    *
    */
   struct ndpi_detection_module_struct *ndpi_init_detection_module_ext(struct ndpi_global_context *g_ctx,
-                                                                      const NDPI_INTERNAL_PROTOCOL_BITMASK *detection_bitmask);
+                                                                      const struct ndpi_bitmask *detection_bitmask);
 
   /**
    * Completes the initialization (2nd step)
@@ -880,6 +880,14 @@ extern "C" {
   u_int ndpi_get_num_protocols(struct ndpi_detection_module_struct *ndpi_mod);
 
   /**
+   * Get the number of the internal protocols.
+   *
+   * @return  the number of protocols
+   *
+   */
+  u_int ndpi_get_num_internal_protocols(void);
+
+  /**
    * Get the nDPI version release
    *
    * @return the NDPI_GIT_RELEASE
@@ -2433,6 +2441,16 @@ extern "C" {
    */
   int ndpi_memcasecmp(const void *s1, const void *s2, size_t n);
 
+
+  int ndpi_bitmask_alloc(struct ndpi_bitmask *b, u_int16_t max_bits);
+  void ndpi_bitmask_dealloc(struct ndpi_bitmask *b);
+  void ndpi_bitmask_set(struct ndpi_bitmask *b, u_int16_t bit);
+  void ndpi_bitmask_clear(struct ndpi_bitmask *b, u_int16_t bit);
+  int ndpi_bitmask_is_set(const struct ndpi_bitmask *b, u_int16_t bit);
+  void ndpi_bitmask_set_all(struct ndpi_bitmask *b);
+  void ndpi_bitmask_reset(struct ndpi_bitmask *b);
+  struct ndpi_bitmask *ndpi_bitmask_clone(const struct ndpi_bitmask *b);
+
 #ifdef __cplusplus
 }
 #endif