A new interface for dissectors registration (#2843)

We use `registr_dissector()` instead of
`ndpi_set_bitmask_protocol_detection()`.

Every file in `src/lib/protocols/*.c` is a dissector.

Every dissector can handle multiple protocols.

The real goal is this small change:
```
 struct call_function_struct {
-  NDPI_PROTOCOL_BITMASK detection_bitmask;
```
i.e. getting rid of another protocol bitmask: this is mandatory to try
to fix #2136 (see also e845e8205b68752c997d05224d8b2fd45acde714)

As a nice side effect, we remove a bitmask comparison in the hot function
`check_ndpi_detection_func()`

TODO: change logging configuration from per-protocol to per-dissector

1 files changed, 5 insertions, 7 deletions

diff --git a/src/lib/protocols/postgres.c b/src/lib/protocols/postgres.c
index 68fe9b8c5..a9712500d 100644
--- a/src/lib/protocols/postgres.c
+++ b/src/lib/protocols/postgres.c
@@ -119,17 +119,15 @@ static void ndpi_search_postgres_tcp(struct ndpi_detection_module_struct
 		}
 	}
 
-	NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
+	NDPI_EXCLUDE_DISSECTOR(ndpi_struct, flow);
 }
 
 
 void init_postgres_dissector(struct ndpi_detection_module_struct *ndpi_struct)
 {
-  ndpi_set_bitmask_protocol_detection("PostgreSQL", ndpi_struct,
-				      NDPI_PROTOCOL_POSTGRES,
-				      ndpi_search_postgres_tcp,
-				      NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
-				      SAVE_DETECTION_BITMASK_AS_UNKNOWN,
-				      ADD_TO_DETECTION_BITMASK);
+  register_dissector("PostgreSQL", ndpi_struct,
+                     ndpi_search_postgres_tcp,
+                     NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
+                     1, NDPI_PROTOCOL_POSTGRES);
 }