New API to enable/disable protocols; remove `ndpi_set_protocol_detection_bitmask2()` (#2853)

The main goal is not to have the bitmask depending on the total number
of protocols anymore: `NDPI_INTERNAL_PROTOCOL_BITMASK` depends only on
internal protocols, i.e. on `NDPI_MAX_INTERNAL_PROTOCOLS`, i.e.
custom-defined protocols are not counted.
See #2136

Keep the old data structure `NDPI_PROTOCOL_BITMASK` with the old
semantic.

Since we need to change the API (and all the application code...)
anyway, simplify the API: by default all the protocols are enabled.
If you need otherwise, please use `ndpi_init_detection_module_ext()`
instead of `ndpi_init_detection_module()` (you can find an example in
the `ndpiReader` code).

To update the application code you likely only need to remove these 3
lines from your code:
```
- NDPI_PROTOCOL_BITMASK all;
- NDPI_BITMASK_SET_ALL(all);
- ndpi_set_protocol_detection_bitmask2(ndpi_str, &all);
```

Removed an unused field and struct definition.

1 files changed, 9 insertions, 12 deletions

diff --git a/fuzz/fuzz_readerutils_workflow.cpp b/fuzz/fuzz_readerutils_workflow.cpp
index a92877aaa..919d87f25 100644
--- a/fuzz/fuzz_readerutils_workflow.cpp
+++ b/fuzz/fuzz_readerutils_workflow.cpp
@@ -25,12 +25,11 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
   struct ndpi_workflow_prefs prefs;
   pcap_t *pcap_handle;
   ndpi_serialization_format serialization_format;
-  NDPI_PROTOCOL_BITMASK enabled_bitmask;
   ndpi_risk flow_risk;
   struct ndpi_flow_info *flow = NULL; /* unused */
   const u_char *pkt;
   struct pcap_pkthdr *header;
-  int r, rc;
+  int r;
   char errbuf[PCAP_ERRBUF_SIZE];
   FILE *fd;
   u_int8_t debug_protos_index;
@@ -90,19 +89,17 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
 
   g_ctx = ndpi_global_init();
 
-  w = ndpi_workflow_init(&prefs, pcap_handle, 1, serialization_format, g_ctx);
+
+
+  w = ndpi_workflow_init(&prefs, pcap_handle, 1, serialization_format, g_ctx, NULL);
   if(w) {
-    NDPI_BITMASK_SET_ALL(enabled_bitmask);
-    rc = ndpi_set_protocol_detection_bitmask2(w->ndpi_struct, &enabled_bitmask);
-    if(rc == 0) {
-      ndpi_finalize_initialization(w->ndpi_struct);
+    ndpi_finalize_initialization(w->ndpi_struct);
 
-      header = NULL;
+    header = NULL;
+    r = pcap_next_ex(pcap_handle, &header, &pkt);
+    while (r > 0) {
+      ndpi_workflow_process_packet(w, header, pkt, &flow_risk, &flow);
       r = pcap_next_ex(pcap_handle, &header, &pkt);
-      while (r > 0) {
-        ndpi_workflow_process_packet(w, header, pkt, &flow_risk, &flow);
-        r = pcap_next_ex(pcap_handle, &header, &pkt);
-      }
     }
 
     ndpi_workflow_free(w);