fuzz: extend fuzzing coverage (#2040)

Some notes:
* libinjection: according to https://github.com/libinjection/libinjection/issues/44,
it seems NULL characters are valid in the input string;
* RTP: `rtp_get_stream_type()` is called only for RTP packets; if you
want to tell RTP from RTCP you should use `is_rtp_or_rtcp()`;
* TLS: unnecessary check; we already make the same check just above, at
the beginning of the `while` loop

4 files changed, 51 insertions, 0 deletions

diff --git a/tests/cfgs/default/pcap/quic_cc_ack.pcapng b/tests/cfgs/default/pcap/quic_cc_ack.pcapng
new file mode 100644
index 000000000..055de0c1e
--- /dev/null
+++ b/tests/cfgs/default/pcap/quic_cc_ack.pcapng
diff --git a/tests/cfgs/default/pcap/stun_classic.pcap b/tests/cfgs/default/pcap/stun_classic.pcap
new file mode 100644
index 000000000..64b282ae5
--- /dev/null
+++ b/tests/cfgs/default/pcap/stun_classic.pcap
diff --git a/tests/cfgs/default/result/quic_cc_ack.pcapng.out b/tests/cfgs/default/result/quic_cc_ack.pcapng.out
new file mode 100644
index 000000000..7d6c1667b
--- /dev/null
+++ b/tests/cfgs/default/result/quic_cc_ack.pcapng.out
@@ -0,0 +1,26 @@
+Guessed flow protos:	0
+
+DPI Packets (UDP):	2	(1.00 pkts/flow)
+Confidence DPI              : 2 (flows)
+Num dissector calls: 2 (1.00 diss/flow)
+LRU cache ookla:      0/0/0 (insert/search/found)
+LRU cache bittorrent: 0/0/0 (insert/search/found)
+LRU cache zoom:       0/0/0 (insert/search/found)
+LRU cache stun:       0/0/0 (insert/search/found)
+LRU cache tls_cert:   0/0/0 (insert/search/found)
+LRU cache mining:     0/0/0 (insert/search/found)
+LRU cache msteams:    0/0/0 (insert/search/found)
+LRU cache stun_zoom:  0/0/0 (insert/search/found)
+Automa host:          0/0 (search/found)
+Automa domain:        0/0 (search/found)
+Automa tls cert:      0/0 (search/found)
+Automa risk mask:     0/0 (search/found)
+Automa common alpns:  0/0 (search/found)
+Patricia risk mask:   4/0 (search/found)
+Patricia risk:        4/0 (search/found)
+Patricia protocols:   3/1 (search/found)
+
+QUIC	2	2784	2
+
+	1	UDP 152.14.223.145:57113 -> 71.98.228.93:443 [proto: 188/QUIC][IP: 0/Unknown][Encrypted][Confidence: DPI][DPI packets: 1][cat: Web/5][1 pkts/1392 bytes -> 0 pkts/0 bytes][Goodput ratio: 97/0][< 1 sec][Risk: ** Unidirectional Traffic **][Risk Score: 10][Risk Info: No server to client traffic][Plen Bins: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,100,0,0,0,0,0]
+	2	UDP 183.23.159.144:37787 -> 108.140.147.22:443 [proto: 188/QUIC][IP: 276/Azure][Encrypted][Confidence: DPI][DPI packets: 1][cat: Web/5][1 pkts/1392 bytes -> 0 pkts/0 bytes][Goodput ratio: 97/0][< 1 sec][Risk: ** Unidirectional Traffic **][Risk Score: 10][Risk Info: No server to client traffic][PLAIN TEXT (IhUo.7y)][Plen Bins: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,100,0,0,0,0,0]
diff --git a/tests/cfgs/default/result/stun_classic.pcap.out b/tests/cfgs/default/result/stun_classic.pcap.out
new file mode 100644
index 000000000..ce9d637ed
--- /dev/null
+++ b/tests/cfgs/default/result/stun_classic.pcap.out
@@ -0,0 +1,25 @@
+Guessed flow protos:	0
+
+DPI Packets (UDP):	5	(5.00 pkts/flow)
+Confidence DPI              : 1 (flows)
+Num dissector calls: 168 (168.00 diss/flow)
+LRU cache ookla:      0/0/0 (insert/search/found)
+LRU cache bittorrent: 0/0/0 (insert/search/found)
+LRU cache zoom:       0/0/0 (insert/search/found)
+LRU cache stun:       0/4/0 (insert/search/found)
+LRU cache tls_cert:   0/0/0 (insert/search/found)
+LRU cache mining:     0/0/0 (insert/search/found)
+LRU cache msteams:    0/0/0 (insert/search/found)
+LRU cache stun_zoom:  0/0/0 (insert/search/found)
+Automa host:          0/0 (search/found)
+Automa domain:        0/0 (search/found)
+Automa tls cert:      0/0 (search/found)
+Automa risk mask:     0/0 (search/found)
+Automa common alpns:  0/0 (search/found)
+Patricia risk mask:   2/0 (search/found)
+Patricia risk:        0/0 (search/found)
+Patricia protocols:   2/0 (search/found)
+
+RTP	22	1624	1
+
+	1	UDP 172.16.63.224:55050 <-> 172.16.63.21:13958 [proto: 78.87/STUN.RTP][IP: 0/Unknown][ClearText][Confidence: DPI][DPI packets: 5][cat: Media/1][9 pkts/662 bytes <-> 13 pkts/962 bytes][Goodput ratio: 43/43][0.23 sec][bytes ratio: -0.185 (Mixed)][IAT c2s/s2c min/avg/max/stddev: 4/0 32/17 101/42 32/11][Pkt Len c2s/s2c min/avg/max/stddev: 70/74 74/74 74/74 1/0][Risk: ** Known Proto on Non Std Port **][Risk Score: 50][Plen Bins: 4,95,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]