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// Copyright 2020 The gVisor Authors.
//
// 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 <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
#include <vector>
#include "gtest/gtest.h"
#include "test/syscalls/linux/socket_test_util.h"
#include "test/util/file_descriptor.h"
#include "test/util/save_util.h"
#include "test/util/test_util.h"
namespace gvisor {
namespace testing {
namespace {
// Test ICMP port exhaustion returns EAGAIN.
//
// We disable both random/cooperative S/R for this test as it makes way too many
// syscalls.
TEST(PingSocket, ICMPPortExhaustion_NoRandomSave) {
DisableSave ds;
{
auto s = Socket(AF_INET, SOCK_DGRAM, IPPROTO_ICMP);
if (!s.ok()) {
ASSERT_EQ(s.error().errno_value(), EACCES);
GTEST_SKIP();
}
}
const struct sockaddr_in addr = {
.sin_family = AF_INET,
.sin_addr =
{
.s_addr = htonl(INADDR_LOOPBACK),
},
};
std::vector<FileDescriptor> sockets;
constexpr int kSockets = 65536;
for (int i = 0; i < kSockets; i++) {
auto s =
ASSERT_NO_ERRNO_AND_VALUE(Socket(AF_INET, SOCK_DGRAM, IPPROTO_ICMP));
int ret = connect(s.get(), reinterpret_cast<const struct sockaddr*>(&addr),
sizeof(addr));
if (ret == 0) {
sockets.push_back(std::move(s));
continue;
}
ASSERT_THAT(ret, SyscallFailsWithErrno(EAGAIN));
break;
}
}
} // namespace
} // namespace testing
} // namespace gvisor
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