// Copyright 2026 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.

//

////////////////////////////////////////////////////////////////////////////////

#define _GNU_SOURCE

#include <sys/types.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <netinet/ip6.h>

#include <stdint.h>

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include "radvd.h"

// Mock functions needed for linking

int sock = -1;

// radvd.h declares these, but we might need to define them if we don't link radvd.o

// However, we will link against objects that might need them.

int LL_DEBUG_LOG = 0;

int log_method = L_STDERR;

char *conf_file = NULL;

char *pname = "fuzz_config";

// We need to mock logging functions to avoid cluttering output

void dlog(int level, int flevel, char const *fmt, ...) {}

void flog(int level, char const *fmt, ...) {}

void set_debuglevel(int level) {}

int get_debuglevel(void) { return 0; }

// We need readin_config

struct Interface *readin_config(char const *path);

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {

    char filename[] = "/tmp/fuzz-config-XXXXXX";

    int fd = mkstemp(filename);

    if (fd < 0) {

        return 0;

    }

    write(fd, data, size);

    close(fd);

    struct Interface *ifaces = readin_config(filename);

    if (ifaces) {

        free_ifaces(ifaces);

    }

    unlink(filename);

    return 0;

}