ndpi: add run_tests.sh (#13597)

`infra/experimental/chronos/check_tests.sh ndpi c`

```
sha256:a72333481d219c8d9a6a507ff125e4c2216e3dbb3c578a5832da586e3354df59
/src/ndpi/tests/unit /src
            serializerUnitTest                      OK
        serializeProtoUnitTest                      OK
/src
```

Signed-off-by: Adam Korczynski <adam@adalogics.com>

Author: AdamKorcz

projects/ndpi/Dockerfile

@@ -15,8 +15,10 @@
 ################################################################################
 
 FROM gcr.io/oss-fuzz-base/base-builder
-RUN apt-get update && apt-get install -y make autoconf automake autogen pkg-config libtool flex bison cmake libnuma-dev libpcre2-dev
+RUN apt-get update && apt-get install -y make autoconf automake autogen pkg-config libtool flex bison cmake libnuma-dev libpcre2-dev libjson-c-dev
 RUN git clone --depth 1 https://github.com/ntop/nDPI.git ndpi
 ADD https://www.tcpdump.org/release/libpcap-1.9.1.tar.gz libpcap-1.9.1.tar.gz
-COPY build.sh $SRC/
+ADD https://github.com/json-c/json-c/archive/refs/tags/json-c-0.17-20230812.tar.gz json-c-0.17-20230812.tar.gz
+RUN tar -xvzf json-c-0.17-20230812.tar.gz
+COPY build.sh run_tests.diff run_tests.sh $SRC/
 WORKDIR $SRC

projects/ndpi/build.sh

@@ -15,4 +15,19 @@
 #
 ################################################################################
 
+pushd $SRC/ndpi
+  git apply $SRC/run_tests.diff
+popd
+
+pushd $SRC/json-c-json-c-0.17-20230812
+  mkdir build
+  cd build
+  cmake -DBUILD_SHARED_LIBS=OFF ..
+  make -j$(nproc)
+  make install
+popd
+
 bash -x ./ndpi/tests/ossfuzz.sh
+pushd $SRC/ndpi/tests/unit
+    make unit
+popd

projects/ndpi/run_tests.diff

@@ -0,0 +1,13 @@
+diff --git a/tests/ossfuzz.sh b/tests/ossfuzz.sh
+index e63a3d2..02fef25 100644
+--- a/tests/ossfuzz.sh
++++ b/tests/ossfuzz.sh
+@@ -44,7 +44,7 @@ fi
+ cd ndpi
+ # Set LDFLAGS variable and `--with-only-libndpi` option as workaround for the
+ # "missing dependencies errors" in the introspector build. See #8939
+-RANLIB=llvm-ranlib LDFLAGS="-L/usr/local/lib -lpcap" ./autogen.sh --enable-fuzztargets --with-only-libndpi --enable-tls-sigs
++RANLIB=llvm-ranlib LDFLAGS="-L/usr/local/lib -lpcap" ./autogen.sh --enable-fuzztargets --enable-tls-sigs
+ make -j$(nproc)
+ # Copy fuzzers
+ ls fuzz/fuzz* | grep -v "\." | while read -r i; do cp "$i" "$OUT"/; done

projects/ndpi/run_tests.sh

@@ -0,0 +1,20 @@
+#!/bin/bash -eu
+# Copyright 2025 Google LLC.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+pushd $SRC/ndpi/tests/unit
+    ./unit
+popd