1 files changed, 164 insertions, 0 deletions
diff --git a/fuzz/main.c b/fuzz/main.c
new file mode 100644
index 0000000..4bfc66e
--- /dev/null
+++ b/fuzz/main.c
@@ -0,0 +1,164 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, you can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "fuzz.h"
+
+#ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
+
+#include <dirent.h>
+
+static void
+test_one_file(const char *filename) {
+	int fd;
+	struct stat st;
+	char *data;
+	ssize_t n;
+
+	if ((fd = open(filename, O_RDONLY)) == -1) {
+		fprintf(stderr, "Failed to open %s: %s\n", filename,
+			strerror(errno));
+		return;
+	}
+
+	if (fstat(fd, &st) != 0) {
+		fprintf(stderr, "Failed to stat %s: %s\n", filename,
+			strerror(errno));
+		goto closefd;
+	}
+
+	data = malloc(st.st_size);
+	n = read(fd, data, st.st_size);
+	if (n == st.st_size) {
+		printf("testing %zd bytes from %s\n", n, filename);
+		fflush(stdout);
+		LLVMFuzzerTestOneInput((const uint8_t *)data, n);
+		fflush(stderr);
+	} else {
+		if (n < 0) {
+			fprintf(stderr,
+				"Failed to read %zd bytes from %s: %s\n",
+				(ssize_t)st.st_size, filename, strerror(errno));
+		} else {
+			fprintf(stderr,
+				"Failed to read %zd bytes from %s, got %zd\n",
+				(ssize_t)st.st_size, filename, n);
+		}
+	}
+	free(data);
+closefd:
+	close(fd);
+}
+
+static void
+test_all_from(const char *dirname) {
+	DIR *dirp;
+	struct dirent *dp;
+
+	dirp = opendir(dirname);
+	if (dirp == NULL) {
+		return;
+	}
+
+	while ((dp = readdir(dirp)) != NULL) {
+		char filename[strlen(dirname) + strlen(dp->d_name) + 2];
+
+		if (dp->d_name[0] == '.') {
+			continue;
+		}
+		snprintf(filename, sizeof(filename), "%s/%s", dirname,
+			 dp->d_name);
+		test_one_file(filename);
+	}
+
+	closedir(dirp);
+}
+
+int
+main(int argc, char **argv) {
+	int ret;
+	char corpusdir[PATH_MAX];
+	const char *target = strrchr(argv[0], '/');
+
+	ret = LLVMFuzzerInitialize(&argc, &argv);
+	if (ret != 0) {
+		fprintf(stderr, "LLVMFuzzerInitialize failure: %d\n", ret);
+		return 1;
+	}
+
+	if (argv[1] != NULL && strcmp(argv[1], "-d") == 0) {
+		debug = true;
+		argv++;
+		argc--;
+	}
+
+	if (argv[1] != NULL) {
+		while (argv[1] != NULL) {
+			test_one_file(argv[1]);
+			argv++;
+			argc--;
+		}
+		POST(argc);
+		return (0);
+	}
+
+	target = (target != NULL) ? target + 1 : argv[0];
+	if (strncmp(target, "lt-", 3) == 0) {
+		target += 3;
+	}
+
+	snprintf(corpusdir, sizeof(corpusdir), FUZZDIR "/%s.in", target);
+
+	test_all_from(corpusdir);
+
+	return (0);
+}
+
+#elif __AFL_COMPILER
+
+int
+main(int argc, char **argv) {
+	int ret;
+	unsigned char buf[64 * 1024];
+
+	LLVMFuzzerInitialize(&argc, &argv);
+	if (ret != 0) {
+		fprintf(stderr, "LLVMFuzzerInitialize failure: %d\n", ret);
+		return 1;
+	}
+
+#ifdef __AFL_LOOP
+	while (__AFL_LOOP(10000)) { /* only works with afl-clang-fast */
+#else  /* ifdef __AFL_LOOP */
+	{
+#endif /* ifdef __AFL_LOOP */
+		ret = fread(buf, 1, sizeof(buf), stdin);
+		if (ret < 0) {
+			return (0);
+		}
+
+		LLVMFuzzerTestOneInput(buf, ret);
+	}
+
+	return (0);
+}
+
+#endif /* FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION */