mirror of https://github.com/google/oss-fuzz.git
83 lines
2.3 KiB
C++
83 lines
2.3 KiB
C++
/* Copyright 2023 Google LLC
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#include <fcntl.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <fuzzer/FuzzedDataProvider.h>
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extern "C" {
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#include "libevent/include/event2/buffer.h"
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#include "libevent/include/event2/bufferevent.h"
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#include "libevent/include/event2/dns.h"
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#include "libevent/include/event2/event.h"
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}
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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FuzzedDataProvider data_provider(data, size);
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uint32_t flags = data_provider.ConsumeIntegral<uint32_t>();
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std::string s1 = data_provider.ConsumeRandomLengthString();
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std::string s2 = data_provider.ConsumeRandomLengthString();
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struct event_base *base = NULL;
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struct evdns_base *dns = NULL;
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base = event_base_new();
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dns = evdns_base_new(base, flags % 65537);
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/* Create resolv.conf file*/
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char resolvFilename[50];
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sprintf(resolvFilename, "/tmp/resolv.%d", getpid());
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FILE *fp = fopen(resolvFilename, "wb");
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if (!fp) {
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goto cleanup;
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}
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fwrite(s1.c_str(), s1.size(), 1, fp);
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fclose(fp);
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evdns_base_resolv_conf_parse(dns, flags % 17, resolvFilename);
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/* Create /etc/hosts file*/
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char hostsFilename[50];
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sprintf(hostsFilename, "/tmp/hosts.%d", getpid());
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fp = fopen(hostsFilename, "wb");
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if (!fp) {
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unlink(resolvFilename);
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goto cleanup;
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}
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fwrite(s2.c_str(), s2.size(), 1, fp);
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fclose(fp);
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evdns_base_load_hosts(dns, hostsFilename);
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evdns_base_search_ndots_set(dns, flags);
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unlink(resolvFilename);
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unlink(hostsFilename);
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evdns_base_search_clear(dns);
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evdns_base_clear_host_addresses(dns);
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/*clean up*/
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cleanup:
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evdns_base_free(dns, 0);
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event_base_free(base);
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return 0;
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}
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