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// Copyright 2018 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 "test/syscalls/linux/socket_ip_udp_generic.h"
#include <errno.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <poll.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/un.h>
#include "gtest/gtest.h"
#include "test/syscalls/linux/socket_test_util.h"
#include "test/util/test_util.h"
namespace gvisor {
namespace testing {
TEST_P(UDPSocketPairTest, MulticastTTLDefault) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
int get = -1;
socklen_t get_len = sizeof(get);
ASSERT_THAT(getsockopt(sockets->first_fd(), IPPROTO_IP, IP_MULTICAST_TTL,
&get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get_len, sizeof(get));
EXPECT_EQ(get, 1);
}
TEST_P(UDPSocketPairTest, SetUDPMulticastTTLMin) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
constexpr int kMin = 0;
EXPECT_THAT(setsockopt(sockets->first_fd(), IPPROTO_IP, IP_MULTICAST_TTL,
&kMin, sizeof(kMin)),
SyscallSucceeds());
int get = -1;
socklen_t get_len = sizeof(get);
ASSERT_THAT(getsockopt(sockets->first_fd(), IPPROTO_IP, IP_MULTICAST_TTL,
&get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get_len, sizeof(get));
EXPECT_EQ(get, kMin);
}
TEST_P(UDPSocketPairTest, SetUDPMulticastTTLMax) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
constexpr int kMax = 255;
EXPECT_THAT(setsockopt(sockets->first_fd(), IPPROTO_IP, IP_MULTICAST_TTL,
&kMax, sizeof(kMax)),
SyscallSucceeds());
int get = -1;
socklen_t get_len = sizeof(get);
ASSERT_THAT(getsockopt(sockets->first_fd(), IPPROTO_IP, IP_MULTICAST_TTL,
&get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get_len, sizeof(get));
EXPECT_EQ(get, kMax);
}
TEST_P(UDPSocketPairTest, SetUDPMulticastTTLNegativeOne) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
constexpr int kArbitrary = 6;
EXPECT_THAT(setsockopt(sockets->first_fd(), IPPROTO_IP, IP_MULTICAST_TTL,
&kArbitrary, sizeof(kArbitrary)),
SyscallSucceeds());
constexpr int kNegOne = -1;
EXPECT_THAT(setsockopt(sockets->first_fd(), IPPROTO_IP, IP_MULTICAST_TTL,
&kNegOne, sizeof(kNegOne)),
SyscallSucceeds());
int get = -1;
socklen_t get_len = sizeof(get);
ASSERT_THAT(getsockopt(sockets->first_fd(), IPPROTO_IP, IP_MULTICAST_TTL,
&get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get_len, sizeof(get));
EXPECT_EQ(get, 1);
}
TEST_P(UDPSocketPairTest, SetUDPMulticastTTLBelowMin) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
constexpr int kBelowMin = -2;
EXPECT_THAT(setsockopt(sockets->first_fd(), IPPROTO_IP, IP_MULTICAST_TTL,
&kBelowMin, sizeof(kBelowMin)),
SyscallFailsWithErrno(EINVAL));
}
TEST_P(UDPSocketPairTest, SetUDPMulticastTTLAboveMax) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
constexpr int kAboveMax = 256;
EXPECT_THAT(setsockopt(sockets->first_fd(), IPPROTO_IP, IP_MULTICAST_TTL,
&kAboveMax, sizeof(kAboveMax)),
SyscallFailsWithErrno(EINVAL));
}
TEST_P(UDPSocketPairTest, SetUDPMulticastTTLChar) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
constexpr char kArbitrary = 6;
EXPECT_THAT(setsockopt(sockets->first_fd(), IPPROTO_IP, IP_MULTICAST_TTL,
&kArbitrary, sizeof(kArbitrary)),
SyscallSucceeds());
int get = -1;
socklen_t get_len = sizeof(get);
ASSERT_THAT(getsockopt(sockets->first_fd(), IPPROTO_IP, IP_MULTICAST_TTL,
&get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get_len, sizeof(get));
EXPECT_EQ(get, kArbitrary);
}
TEST_P(UDPSocketPairTest, SetEmptyIPAddMembership) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
struct ip_mreqn req = {};
EXPECT_THAT(setsockopt(sockets->first_fd(), IPPROTO_IP, IP_ADD_MEMBERSHIP,
&req, sizeof(req)),
SyscallFailsWithErrno(EINVAL));
}
TEST_P(UDPSocketPairTest, MulticastLoopDefault) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
int get = -1;
socklen_t get_len = sizeof(get);
ASSERT_THAT(getsockopt(sockets->first_fd(), IPPROTO_IP, IP_MULTICAST_LOOP,
&get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get_len, sizeof(get));
EXPECT_EQ(get, kSockOptOn);
}
TEST_P(UDPSocketPairTest, SetMulticastLoop) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
ASSERT_THAT(setsockopt(sockets->first_fd(), IPPROTO_IP, IP_MULTICAST_LOOP,
&kSockOptOff, sizeof(kSockOptOff)),
SyscallSucceeds());
int get = -1;
socklen_t get_len = sizeof(get);
ASSERT_THAT(getsockopt(sockets->first_fd(), IPPROTO_IP, IP_MULTICAST_LOOP,
&get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get_len, sizeof(get));
EXPECT_EQ(get, kSockOptOff);
ASSERT_THAT(setsockopt(sockets->first_fd(), IPPROTO_IP, IP_MULTICAST_LOOP,
&kSockOptOn, sizeof(kSockOptOn)),
SyscallSucceeds());
ASSERT_THAT(getsockopt(sockets->first_fd(), IPPROTO_IP, IP_MULTICAST_LOOP,
&get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get_len, sizeof(get));
EXPECT_EQ(get, kSockOptOn);
}
TEST_P(UDPSocketPairTest, SetMulticastLoopChar) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
constexpr char kSockOptOnChar = kSockOptOn;
constexpr char kSockOptOffChar = kSockOptOff;
ASSERT_THAT(setsockopt(sockets->first_fd(), IPPROTO_IP, IP_MULTICAST_LOOP,
&kSockOptOffChar, sizeof(kSockOptOffChar)),
SyscallSucceeds());
int get = -1;
socklen_t get_len = sizeof(get);
ASSERT_THAT(getsockopt(sockets->first_fd(), IPPROTO_IP, IP_MULTICAST_LOOP,
&get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get_len, sizeof(get));
EXPECT_EQ(get, kSockOptOff);
ASSERT_THAT(setsockopt(sockets->first_fd(), IPPROTO_IP, IP_MULTICAST_LOOP,
&kSockOptOnChar, sizeof(kSockOptOnChar)),
SyscallSucceeds());
ASSERT_THAT(getsockopt(sockets->first_fd(), IPPROTO_IP, IP_MULTICAST_LOOP,
&get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get_len, sizeof(get));
EXPECT_EQ(get, kSockOptOn);
}
TEST_P(UDPSocketPairTest, ReuseAddrDefault) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
int get = -1;
socklen_t get_len = sizeof(get);
ASSERT_THAT(
getsockopt(sockets->first_fd(), SOL_SOCKET, SO_REUSEADDR, &get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get_len, sizeof(get));
EXPECT_EQ(get, kSockOptOff);
}
TEST_P(UDPSocketPairTest, SetReuseAddr) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
// FIXME(b/129164367): Support SO_REUSEADDR on UDP sockets.
SKIP_IF(IsRunningOnGvisor());
ASSERT_THAT(setsockopt(sockets->first_fd(), SOL_SOCKET, SO_REUSEADDR,
&kSockOptOn, sizeof(kSockOptOn)),
SyscallSucceeds());
int get = -1;
socklen_t get_len = sizeof(get);
ASSERT_THAT(
getsockopt(sockets->first_fd(), SOL_SOCKET, SO_REUSEADDR, &get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get_len, sizeof(get));
EXPECT_EQ(get, kSockOptOn);
ASSERT_THAT(setsockopt(sockets->first_fd(), SOL_SOCKET, SO_REUSEADDR,
&kSockOptOff, sizeof(kSockOptOff)),
SyscallSucceeds());
ASSERT_THAT(
getsockopt(sockets->first_fd(), SOL_SOCKET, SO_REUSEADDR, &get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get_len, sizeof(get));
EXPECT_EQ(get, kSockOptOff);
}
TEST_P(UDPSocketPairTest, ReusePortDefault) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
int get = -1;
socklen_t get_len = sizeof(get);
ASSERT_THAT(
getsockopt(sockets->first_fd(), SOL_SOCKET, SO_REUSEPORT, &get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get_len, sizeof(get));
EXPECT_EQ(get, kSockOptOff);
}
TEST_P(UDPSocketPairTest, SetReusePort) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
ASSERT_THAT(setsockopt(sockets->first_fd(), SOL_SOCKET, SO_REUSEPORT,
&kSockOptOn, sizeof(kSockOptOn)),
SyscallSucceeds());
int get = -1;
socklen_t get_len = sizeof(get);
ASSERT_THAT(
getsockopt(sockets->first_fd(), SOL_SOCKET, SO_REUSEPORT, &get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get_len, sizeof(get));
EXPECT_EQ(get, kSockOptOn);
ASSERT_THAT(setsockopt(sockets->first_fd(), SOL_SOCKET, SO_REUSEPORT,
&kSockOptOff, sizeof(kSockOptOff)),
SyscallSucceeds());
ASSERT_THAT(
getsockopt(sockets->first_fd(), SOL_SOCKET, SO_REUSEPORT, &get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get_len, sizeof(get));
EXPECT_EQ(get, kSockOptOff);
}
TEST_P(UDPSocketPairTest, SetReuseAddrReusePort) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
// FIXME(b/129164367): Support SO_REUSEADDR on UDP sockets.
SKIP_IF(IsRunningOnGvisor());
ASSERT_THAT(setsockopt(sockets->first_fd(), SOL_SOCKET, SO_REUSEADDR,
&kSockOptOn, sizeof(kSockOptOn)),
SyscallSucceeds());
ASSERT_THAT(setsockopt(sockets->first_fd(), SOL_SOCKET, SO_REUSEPORT,
&kSockOptOn, sizeof(kSockOptOn)),
SyscallSucceeds());
int get = -1;
socklen_t get_len = sizeof(get);
ASSERT_THAT(
getsockopt(sockets->first_fd(), SOL_SOCKET, SO_REUSEADDR, &get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get_len, sizeof(get));
EXPECT_EQ(get, kSockOptOn);
ASSERT_THAT(
getsockopt(sockets->first_fd(), SOL_SOCKET, SO_REUSEPORT, &get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get_len, sizeof(get));
EXPECT_EQ(get, kSockOptOn);
}
// Test getsockopt for a socket which is not set with IP_PKTINFO option.
TEST_P(UDPSocketPairTest, IPPKTINFODefault) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
int get = -1;
socklen_t get_len = sizeof(get);
ASSERT_THAT(
getsockopt(sockets->first_fd(), SOL_IP, IP_PKTINFO, &get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get_len, sizeof(get));
EXPECT_EQ(get, kSockOptOff);
}
// Test setsockopt and getsockopt for a socket with IP_PKTINFO option.
TEST_P(UDPSocketPairTest, SetAndGetIPPKTINFO) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
int level = SOL_IP;
int type = IP_PKTINFO;
// Check getsockopt before IP_PKTINFO is set.
int get = -1;
socklen_t get_len = sizeof(get);
ASSERT_THAT(setsockopt(sockets->first_fd(), level, type, &kSockOptOn,
sizeof(kSockOptOn)),
SyscallSucceedsWithValue(0));
ASSERT_THAT(getsockopt(sockets->first_fd(), level, type, &get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get, kSockOptOn);
EXPECT_EQ(get_len, sizeof(get));
ASSERT_THAT(setsockopt(sockets->first_fd(), level, type, &kSockOptOff,
sizeof(kSockOptOff)),
SyscallSucceedsWithValue(0));
ASSERT_THAT(getsockopt(sockets->first_fd(), level, type, &get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get, kSockOptOff);
EXPECT_EQ(get_len, sizeof(get));
}
// Holds TOS or TClass information for IPv4 or IPv6 respectively.
struct RecvTosOption {
int level;
int option;
};
RecvTosOption GetRecvTosOption(int domain) {
TEST_CHECK(domain == AF_INET || domain == AF_INET6);
RecvTosOption opt;
switch (domain) {
case AF_INET:
opt.level = IPPROTO_IP;
opt.option = IP_RECVTOS;
break;
case AF_INET6:
opt.level = IPPROTO_IPV6;
opt.option = IPV6_RECVTCLASS;
break;
}
return opt;
}
// Ensure that Receiving TOS or TCLASS is off by default.
TEST_P(UDPSocketPairTest, RecvTosDefault) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
RecvTosOption t = GetRecvTosOption(GetParam().domain);
int get = -1;
socklen_t get_len = sizeof(get);
ASSERT_THAT(
getsockopt(sockets->first_fd(), t.level, t.option, &get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get_len, sizeof(get));
EXPECT_EQ(get, kSockOptOff);
}
// Test that setting and getting IP_RECVTOS or IPV6_RECVTCLASS works as
// expected.
TEST_P(UDPSocketPairTest, SetRecvTos) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
RecvTosOption t = GetRecvTosOption(GetParam().domain);
ASSERT_THAT(setsockopt(sockets->first_fd(), t.level, t.option, &kSockOptOff,
sizeof(kSockOptOff)),
SyscallSucceeds());
int get = -1;
socklen_t get_len = sizeof(get);
ASSERT_THAT(
getsockopt(sockets->first_fd(), t.level, t.option, &get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get_len, sizeof(get));
EXPECT_EQ(get, kSockOptOff);
ASSERT_THAT(setsockopt(sockets->first_fd(), t.level, t.option, &kSockOptOn,
sizeof(kSockOptOn)),
SyscallSucceeds());
ASSERT_THAT(
getsockopt(sockets->first_fd(), t.level, t.option, &get, &get_len),
SyscallSucceedsWithValue(0));
EXPECT_EQ(get_len, sizeof(get));
EXPECT_EQ(get, kSockOptOn);
}
// Test that any socket (including IPv6 only) accepts the IPv4 TOS option: this
// mirrors behavior in linux.
TEST_P(UDPSocketPairTest, TOSRecvMismatch) {
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
RecvTosOption t = GetRecvTosOption(AF_INET);
int get = -1;
socklen_t get_len = sizeof(get);
ASSERT_THAT(
getsockopt(sockets->first_fd(), t.level, t.option, &get, &get_len),
SyscallSucceedsWithValue(0));
}
// Test that an IPv4 socket does not support the IPv6 TClass option.
TEST_P(UDPSocketPairTest, TClassRecvMismatch) {
// This should only test AF_INET sockets for the mismatch behavior.
SKIP_IF(GetParam().domain != AF_INET);
auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
int get = -1;
socklen_t get_len = sizeof(get);
ASSERT_THAT(getsockopt(sockets->first_fd(), IPPROTO_IPV6, IPV6_RECVTCLASS,
&get, &get_len),
SyscallFailsWithErrno(EOPNOTSUPP));
}
} // namespace testing
} // namespace gvisor
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