tests: fuzzing target for zlog_5424 code

This just tries logging messages in random ways to allow the fuzzer to
do its thing and try to find weird edge cases.

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>

1 files changed, 41 insertions, 0 deletions

diff --git a/tests/lib/fuzz_zlog_inputs.py b/tests/lib/fuzz_zlog_inputs.py
new file mode 100644
index 0000000000..74f3286c5f
--- /dev/null
+++ b/tests/lib/fuzz_zlog_inputs.py
@@ -0,0 +1,41 @@
+# zlog fuzz-tester input generator
+#
+# Copyright (C) 2021  David Lamparter for NetDEF, Inc.
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the Free
+# Software Foundation; either version 2 of the License, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; see the file COPYING; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+from itertools import chain
+import struct
+
+lengths = set([128])
+# lengths = [[i, i + 1, i + 3, i - 1, i - 3] for i in lengths]
+# lengths = set([i for i in chain(*lengths) if i >= 0])
+
+dsts = [0, 1, 2, 3]
+fmts = [0, 1, 2, 3]
+
+
+def combo():
+    for l0 in lengths:
+        for l1 in lengths:
+            for l2 in lengths:
+                for fmt in fmts:
+                    for dst in dsts:
+                        yield (l0, l1, l2, fmt, dst)
+
+
+for i, tup in enumerate(combo()):
+    with open("input/i%d" % i, "wb") as fd:
+        fd.write(struct.pack("HHHBB", *tup))