Add check-fuzzers target to Makefile. It reuses existing Janus object…

…s to execute regression testing with corpora files.

Makefile.am

@@ -202,6 +202,15 @@ $(dir_present):
 $(dir_absent):
 	echo "not-a-git-repo" | awk 'BEGIN {print "#include \"version.h\""} {print "const char *janus_build_git_sha = \"" $$0"\";"} END {}' > version.c
 
+##
+# Fuzzers checking
+##
+
+check-fuzzers: FORCE
+	CC=$(CC) SKIP_JANUS_BUILD=1 LIB_FUZZING_ENGINE=fuzzers/standalone.o ./fuzzers/build.sh
+	./fuzzers/run.sh rtcp_fuzzer out/rtcp_fuzzer_seed_corpus
+	./fuzzers/run.sh rtp_fuzzer out/rtp_fuzzer_seed_corpus
+
 .PHONY: FORCE
 FORCE:
 

fuzzers/build.sh

@@ -58,10 +58,15 @@ rm -f $WORK/*.a $WORK/*.o
 # Build and archive necessary Janus objects
 JANUS_LIB="$WORK/janus-lib.a"
 cd $SRC/janus-gateway
-./autogen.sh
-./configure CC="$FUZZ_CC" CFLAGS="$FUZZ_CFLAGS" $JANUS_CONF_FLAGS
-make clean
-make -j$(nproc) $JANUS_OBJECTS
+# Use this variable to skip Janus objects building
+SKIP_JANUS_BUILD=${SKIP_JANUS_BUILD-"0"}
+if [ "$SKIP_JANUS_BUILD" -eq "0" ]; then
+	echo "Building Janus objects"
+	./autogen.sh
+	./configure CC="$FUZZ_CC" CFLAGS="$FUZZ_CFLAGS" $JANUS_CONF_FLAGS
+	make clean
+	make -j$(nproc) $JANUS_OBJECTS
+fi
 ar rcs $JANUS_LIB $JANUS_OBJECTS
 cd -
 

fuzzers/rtp_fuzzer.c

@@ -11,6 +11,11 @@ int janus_log_level = LOG_NONE;
 gboolean janus_log_timestamps = FALSE;
 gboolean janus_log_colors = FALSE;
 
+/* This is to avoid linking with openSSL */
+int RAND_bytes(uint8_t *key, int len) {
+	return 0;
+}
+
 /* Clone libsrtp srtp_validate_rtp_header */
 #define octets_in_rtp_header 12
 #define uint32s_in_rtp_header 3

fuzzers/run.sh

@@ -44,7 +44,7 @@ elif [ -f "$CRASH_FILE" ]; then
 elif [ -d "$CRASH_FILE" ]; then
 	# Run without fuzzing, with an user supplied crashes folder
 	files=$(find "$CRASH_FILE" -maxdepth 1 -type f)
-	if [ -z $files ]; then
+	if [[ -z $files ]]; then
 		echo "Empty crashes folder specified!"
 		exit 1
 	fi