92 lines
2.5 KiB
C++
92 lines
2.5 KiB
C++
// Copyright 2020 The gVisor Authors.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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#include <netinet/in.h>
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#include <netinet/ip.h>
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#include <netinet/ip_icmp.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <vector>
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#include "gtest/gtest.h"
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#include "test/syscalls/linux/socket_test_util.h"
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#include "test/util/file_descriptor.h"
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#include "test/util/save_util.h"
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#include "test/util/test_util.h"
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namespace gvisor {
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namespace testing {
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namespace {
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class PingSocket : public ::testing::Test {
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protected:
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// Creates a socket to be used in tests.
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void SetUp() override;
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// Closes the socket created by SetUp().
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void TearDown() override;
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// The loopback address.
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struct sockaddr_in addr_;
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};
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void PingSocket::SetUp() {
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// On some hosts ping sockets are restricted to specific groups using the
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// sysctl "ping_group_range".
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int s = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
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if (s < 0 && errno == EPERM) {
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GTEST_SKIP();
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}
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close(s);
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addr_ = {};
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// Just a random port as the destination port number is irrelevant for ping
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// sockets.
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addr_.sin_port = 12345;
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addr_.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
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addr_.sin_family = AF_INET;
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}
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void PingSocket::TearDown() {}
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// Test ICMP port exhaustion returns EAGAIN.
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//
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// We disable both random/cooperative S/R for this test as it makes way too many
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// syscalls.
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TEST_F(PingSocket, ICMPPortExhaustion_NoRandomSave) {
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DisableSave ds;
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std::vector<FileDescriptor> sockets;
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constexpr int kSockets = 65536;
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addr_.sin_port = 0;
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for (int i = 0; i < kSockets; i++) {
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auto s =
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ASSERT_NO_ERRNO_AND_VALUE(Socket(AF_INET, SOCK_DGRAM, IPPROTO_ICMP));
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int ret = connect(s.get(), reinterpret_cast<struct sockaddr*>(&addr_),
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sizeof(addr_));
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if (ret == 0) {
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sockets.push_back(std::move(s));
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continue;
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}
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ASSERT_THAT(ret, SyscallFailsWithErrno(EAGAIN));
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break;
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}
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}
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} // namespace
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} // namespace testing
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} // namespace gvisor
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