Extend tests coverage (#1476)

Now there is at least one flow under `tests/pcap` for 249 protocols out
of the 284 ones supported by nDPI.

The 35 protocols without any tests are:

* P2P/sharing protocols: DIRECT_DOWNLOAD_LINK, OPENFT, FASTTRACK,
EDONKEY, SOPCAST, THUNDER, APPLEJUICE, DIRECTCONNECT, STEALTHNET

* games: CSGO, HALFLIFE2, ARMAGETRON, CROSSFIRE, DOFUS, FIESTA,
FLORENSIA, GUILDWARS, MAPLESTORY, WORLD_OF_KUNG_FU

* voip/streaming: VHUA, ICECAST, SHOUTCAST, TVUPLAYER, TRUPHONE

* other: AYIYA, SOAP, TARGUS_GETDATA, RPC, ZMQ, REDIS, VMWARE, NOE,
LOTUS_NOTES, EGP, SAP

Most of these protocols (expecially the P2P and games ones) have been
inherited by OpenDPI and have not been updated since then: even if they
are still used, the detection rules might be outdated.

However code coverage (of `lib/protocols`) only increases from 65.6% to
68.9%.

Improve Citrix, Corba, Fix, Aimini, Megaco, PPStream, SNMP and Some/IP
dissection.
Treat IPP as a HTTP sub protocol.
Fix Cassandra false positives.

Remove `NDPI_PROTOCOL_QQLIVE` and `NDPI_PROTOCOL_REMOTE_SCAN`:
these protocol ids are defined but they are never used.

Remove Collectd support: its code has never been called. If someone is
really interested in this protocol, we can re-add it later, updating the
dissector.

Add decoding of PPI (Per-Packet Information) data link type.

1 files changed, 6 insertions, 1 deletions

diff --git a/src/lib/protocols/cassandra.c b/src/lib/protocols/cassandra.c
index 15b3b0015..058590ba9 100644
--- a/src/lib/protocols/cassandra.c
+++ b/src/lib/protocols/cassandra.c
@@ -110,13 +110,18 @@ void ndpi_search_cassandra(struct ndpi_detection_module_struct *ndpi_struct,
 {
   struct ndpi_packet_struct *packet = &ndpi_struct->packet;
 
+  NDPI_LOG_DBG(ndpi_struct, "search Cassandra\n");
+
   if (packet->tcp) {
     if (packet->payload_packet_len >= CASSANDRA_HEADER_LEN &&
         ndpi_check_valid_cassandra_version(get_u_int8_t(packet->payload, 0)) &&
         ndpi_check_valid_cassandra_flags(get_u_int8_t(packet->payload, 1)) &&
         ndpi_check_valid_cassandra_opcode(get_u_int8_t(packet->payload, 4)) &&
         le32toh(get_u_int32_t(packet->payload, 5)) <= CASSANDRA_MAX_BODY_SIZE &&
-        le32toh(get_u_int32_t(packet->payload, 5)) >= (uint32_t) (packet->payload_packet_len - CASSANDRA_HEADER_LEN)) {
+        le32toh(get_u_int32_t(packet->payload, 5)) >= (uint32_t) (packet->payload_packet_len - CASSANDRA_HEADER_LEN) &&
+        flow->l4.tcp.h323_valid_packets == 0 /* To avoid clashing with H323 */ &&
+        flow->socks4_stage == 0 /* To avoid clashing with SOCKS */) {
+      NDPI_LOG_INFO(ndpi_struct, "found Cassandra\n");
       ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_CASSANDRA, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
       return;
     }