/*

 * Copyright(c) 2017-2018 Tim Ruehsen

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

 * DEALINGS IN THE SOFTWARE.

 *

 * This file is part of libpsl.

 */

#include "../config.h"

#include <stdio.h>

#ifdef HAVE_UNISTD_H

#include <unistd.h>

#endif

#include <stdlib.h>

#ifdef HAVE_STDINT_H

#include <stdint.h>

#endif

#include <string.h>

#include <fcntl.h>

#include <errno.h>

#include <sys/stat.h>

#include "fuzzer.h"

#if defined (TEST_RUN) && defined (HAVE_FMEMOPEN)

#include <dirent.h>

#ifdef HAVE_ALLOCA_H

#  include <alloca.h>

#endif

static void test_all_from(const char *dirname)

{

	DIR *dirp;

	struct dirent *dp;

	if ((dirp = opendir(dirname))) {

		while ((dp = readdir(dirp))) {

			if (*dp->d_name == '.') continue;

			char fname[strlen(dirname) + strlen(dp->d_name) + 2];

			snprintf(fname, sizeof(fname), "%s/%s", dirname, dp->d_name);

			int fd;

			if ((fd = open(fname, O_RDONLY)) == -1) {

				fprintf(stderr, "Failed to open %s (%d)\n", fname, errno);

				continue;

			}

			struct stat st;

			if (fstat(fd, &st) != 0) {

				fprintf(stderr, "Failed to stat %d (%d)\n", fd, errno);

				close(fd);

				continue;

			}

			uint8_t *data = malloc(st.st_size);

			ssize_t n;

			if ((n = read(fd, data, st.st_size)) == st.st_size) {

				printf("testing %llu bytes from '%s'\n", (unsigned long long) st.st_size, fname);

				LLVMFuzzerTestOneInput(data, st.st_size);

			} else

				fprintf(stderr, "Failed to read %llu bytes from %s (%d), got %zd\n", (unsigned long long) st.st_size, fname, errno, n);

			free(data);

			close(fd);

		}

		closedir(dirp);

	}

}

int main(int argc, char **argv)

{

	const char *target;

	char corporadir[sizeof(SRCDIR) + 1 + strlen(argv[0]) + 8];

	/* if VALGRIND testing is enabled, we have to call ourselves with valgrind checking */

	if (argc == 1) {

		const char *valgrind = getenv("TESTS_VALGRIND");

		if (valgrind && *valgrind) {

			size_t cmdsize = strlen(valgrind) + strlen(argv[0]) + 32;

			char *cmd = alloca(cmdsize);

			snprintf(cmd, cmdsize, "TESTS_VALGRIND="" %s %s", valgrind, argv[0]);

			return system(cmd) != 0;

		}

	}

	target = strrchr(argv[0], '/');

	target = target ? target + 1 : argv[0];

	snprintf(corporadir, sizeof(corporadir), SRCDIR "/%s.in", target);

	test_all_from(corporadir);

	snprintf(corporadir, sizeof(corporadir), SRCDIR "/%s.repro", target);

	test_all_from(corporadir);

	return 0;

}

#else /* TEST_RUN && HAVE_FMEMOPEN */

#ifndef __AFL_LOOP

static int __AFL_LOOP(int n)

{

	static int first = 1;

	if (first) {

		first = 0;

		return 1;

	}

	return 0;

}

#endif

int main(int argc, char **argv)

{

#ifdef HAVE_FMEMOPEN

	int ret;

	unsigned char buf[64 * 1024];

	while (__AFL_LOOP(10000)) { /* only works with afl-clang-fast */

		ret = fread(buf, 1, sizeof(buf), stdin);

		if (ret < 0)

			return 0;

		LLVMFuzzerTestOneInput(buf, ret);

	}

	return 0;

#else

	exit (77);

#endif

}

#endif /* TEST_RUN && HAVE_FMEMOPEN*/