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/*
* Copyright (C) 2022 The Android Open Source Project
*
* 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.
*
*/
#include "resolv_fuzzer_utils.h"
namespace android::net {
// Initializes servers to simulate the DNS over UDP/TLS/HTTPS.
test::DNSResponder dns{kDefaultServer, kDnsPortString};
test::DohFrontend doh{kDefaultServer, kDohPortString, "127.0.1.3", kDnsPortString};
test::DNSResponder doh_backend{"127.0.1.3", kDnsPortString};
test::DnsTlsFrontend dot{kDefaultServer, kDotPortString, "127.0.2.3", kDnsPortString};
test::DNSResponder dot_backend{"127.0.2.3", kDnsPortString};
ResolverController resolverCtrl;
// TODO: Consider moving to packages/modules/DnsResolver/tests/resolv_test_utils.h.
void StartDns(test::DNSResponder& dns, const std::vector<DnsRecord>& records) {
for (const auto& r : records) {
dns.addMapping(r.host_name, r.type, r.addr);
}
ASSERT_TRUE(dns.startServer());
dns.clearQueries();
}
int RandomSocketType(FuzzedDataProvider& fdp) {
int socktype = fdp.PickValueInArray(
{SOCK_STREAM, SOCK_DGRAM, SOCK_RAW, SOCK_RDM, SOCK_SEQPACKET, SOCK_DCCP, SOCK_PACKET});
if (fdp.ConsumeBool()) socktype |= SOCK_CLOEXEC;
if (fdp.ConsumeBool()) socktype |= SOCK_NONBLOCK;
return socktype;
}
// Initializes the callback functions to createNetworkCache.
void InitDnsResolverCallbacks() {
gResNetdCallbacks.check_calling_permission = [](const char*) -> bool { return true; };
gResNetdCallbacks.get_network_context = [](uint32_t, uint32_t, android_net_context*) {};
gResNetdCallbacks.log = [](const char*) {};
}
void InitServers() {
StartDns(dns, records);
doh.startServer();
StartDns(doh_backend, records);
dot.startServer();
StartDns(dot_backend, records);
}
void CleanServers() {
dns.clearQueries();
doh.clearQueries();
doh_backend.clearQueries();
dot.clearQueries();
dot_backend.clearQueries();
}
// Initializes servers only one time.
bool DoInit() {
// Sets log level to WARNING to lower I/O time cost.
resolv_set_log_severity(android::base::WARNING);
doh_init_logger(DOH_LOG_LEVEL_WARN);
// Needs to init callback and create netework cache.
InitDnsResolverCallbacks();
resolverCtrl.createNetworkCache(TEST_NETID);
InitServers();
return true;
}
void CleanUp() {
CleanServers();
resolverCtrl.flushNetworkCache(TEST_NETID);
}
} // namespace android::net
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