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Diffstat (limited to 'test/syscalls/linux/socket_test_util.cc')
| -rw-r--r-- | test/syscalls/linux/socket_test_util.cc | 894 |
1 files changed, 0 insertions, 894 deletions
diff --git a/test/syscalls/linux/socket_test_util.cc b/test/syscalls/linux/socket_test_util.cc deleted file mode 100644 index c0c5ab3fe..000000000 --- a/test/syscalls/linux/socket_test_util.cc +++ /dev/null @@ -1,894 +0,0 @@ -// 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_test_util.h" - -#include <arpa/inet.h> -#include <poll.h> -#include <sys/socket.h> - -#include <memory> - -#include "gtest/gtest.h" -#include "absl/memory/memory.h" -#include "absl/strings/str_cat.h" -#include "absl/time/clock.h" -#include "absl/types/optional.h" -#include "test/util/file_descriptor.h" -#include "test/util/posix_error.h" -#include "test/util/temp_path.h" -#include "test/util/thread_util.h" - -namespace gvisor { -namespace testing { - -Creator<SocketPair> SyscallSocketPairCreator(int domain, int type, - int protocol) { - return [=]() -> PosixErrorOr<std::unique_ptr<FDSocketPair>> { - int pair[2]; - RETURN_ERROR_IF_SYSCALL_FAIL(socketpair(domain, type, protocol, pair)); - MaybeSave(); // Save on successful creation. - return absl::make_unique<FDSocketPair>(pair[0], pair[1]); - }; -} - -Creator<FileDescriptor> SyscallSocketCreator(int domain, int type, - int protocol) { - return [=]() -> PosixErrorOr<std::unique_ptr<FileDescriptor>> { - int fd = 0; - RETURN_ERROR_IF_SYSCALL_FAIL(fd = socket(domain, type, protocol)); - MaybeSave(); // Save on successful creation. - return absl::make_unique<FileDescriptor>(fd); - }; -} - -PosixErrorOr<struct sockaddr_un> UniqueUnixAddr(bool abstract, int domain) { - struct sockaddr_un addr = {}; - std::string path = NewTempAbsPathInDir("/tmp"); - if (path.size() >= sizeof(addr.sun_path)) { - return PosixError(EINVAL, - "Unable to generate a temp path of appropriate length"); - } - - if (abstract) { - // Indicate that the path is in the abstract namespace. - path[0] = 0; - } - memcpy(addr.sun_path, path.c_str(), path.length()); - addr.sun_family = domain; - return addr; -} - -Creator<SocketPair> AcceptBindSocketPairCreator(bool abstract, int domain, - int type, int protocol) { - return [=]() -> PosixErrorOr<std::unique_ptr<AddrFDSocketPair>> { - ASSIGN_OR_RETURN_ERRNO(struct sockaddr_un bind_addr, - UniqueUnixAddr(abstract, domain)); - ASSIGN_OR_RETURN_ERRNO(struct sockaddr_un extra_addr, - UniqueUnixAddr(abstract, domain)); - - int bound; - RETURN_ERROR_IF_SYSCALL_FAIL(bound = socket(domain, type, protocol)); - MaybeSave(); // Successful socket creation. - RETURN_ERROR_IF_SYSCALL_FAIL( - bind(bound, reinterpret_cast<struct sockaddr*>(&bind_addr), - sizeof(bind_addr))); - MaybeSave(); // Successful bind. - RETURN_ERROR_IF_SYSCALL_FAIL(listen(bound, /* backlog = */ 5)); - MaybeSave(); // Successful listen. - - int connected; - RETURN_ERROR_IF_SYSCALL_FAIL(connected = socket(domain, type, protocol)); - MaybeSave(); // Successful socket creation. - RETURN_ERROR_IF_SYSCALL_FAIL( - connect(connected, reinterpret_cast<struct sockaddr*>(&bind_addr), - sizeof(bind_addr))); - MaybeSave(); // Successful connect. - - int accepted; - RETURN_ERROR_IF_SYSCALL_FAIL( - accepted = accept4(bound, nullptr, nullptr, - type & (SOCK_NONBLOCK | SOCK_CLOEXEC))); - MaybeSave(); // Successful connect. - - // Cleanup no longer needed resources. - RETURN_ERROR_IF_SYSCALL_FAIL(close(bound)); - MaybeSave(); // Dropped original socket. - - // Only unlink if path is not in abstract namespace. - if (bind_addr.sun_path[0] != 0) { - RETURN_ERROR_IF_SYSCALL_FAIL(unlink(bind_addr.sun_path)); - MaybeSave(); // Unlinked path. - } - - // accepted is before connected to destruct connected before accepted. - // Destructors for nonstatic member objects are called in the reverse order - // in which they appear in the class declaration. - return absl::make_unique<AddrFDSocketPair>(accepted, connected, bind_addr, - extra_addr); - }; -} - -Creator<SocketPair> FilesystemAcceptBindSocketPairCreator(int domain, int type, - int protocol) { - return AcceptBindSocketPairCreator(/* abstract= */ false, domain, type, - protocol); -} - -Creator<SocketPair> AbstractAcceptBindSocketPairCreator(int domain, int type, - int protocol) { - return AcceptBindSocketPairCreator(/* abstract= */ true, domain, type, - protocol); -} - -Creator<SocketPair> BidirectionalBindSocketPairCreator(bool abstract, - int domain, int type, - int protocol) { - return [=]() -> PosixErrorOr<std::unique_ptr<FDSocketPair>> { - ASSIGN_OR_RETURN_ERRNO(struct sockaddr_un addr1, - UniqueUnixAddr(abstract, domain)); - ASSIGN_OR_RETURN_ERRNO(struct sockaddr_un addr2, - UniqueUnixAddr(abstract, domain)); - - int sock1; - RETURN_ERROR_IF_SYSCALL_FAIL(sock1 = socket(domain, type, protocol)); - MaybeSave(); // Successful socket creation. - RETURN_ERROR_IF_SYSCALL_FAIL( - bind(sock1, reinterpret_cast<struct sockaddr*>(&addr1), sizeof(addr1))); - MaybeSave(); // Successful bind. - - int sock2; - RETURN_ERROR_IF_SYSCALL_FAIL(sock2 = socket(domain, type, protocol)); - MaybeSave(); // Successful socket creation. - RETURN_ERROR_IF_SYSCALL_FAIL( - bind(sock2, reinterpret_cast<struct sockaddr*>(&addr2), sizeof(addr2))); - MaybeSave(); // Successful bind. - - RETURN_ERROR_IF_SYSCALL_FAIL(connect( - sock1, reinterpret_cast<struct sockaddr*>(&addr2), sizeof(addr2))); - MaybeSave(); // Successful connect. - - RETURN_ERROR_IF_SYSCALL_FAIL(connect( - sock2, reinterpret_cast<struct sockaddr*>(&addr1), sizeof(addr1))); - MaybeSave(); // Successful connect. - - // Cleanup no longer needed resources. - - // Only unlink if path is not in abstract namespace. - if (addr1.sun_path[0] != 0) { - RETURN_ERROR_IF_SYSCALL_FAIL(unlink(addr1.sun_path)); - MaybeSave(); // Successful unlink. - } - - // Only unlink if path is not in abstract namespace. - if (addr2.sun_path[0] != 0) { - RETURN_ERROR_IF_SYSCALL_FAIL(unlink(addr2.sun_path)); - MaybeSave(); // Successful unlink. - } - - return absl::make_unique<FDSocketPair>(sock1, sock2); - }; -} - -Creator<SocketPair> FilesystemBidirectionalBindSocketPairCreator(int domain, - int type, - int protocol) { - return BidirectionalBindSocketPairCreator(/* abstract= */ false, domain, type, - protocol); -} - -Creator<SocketPair> AbstractBidirectionalBindSocketPairCreator(int domain, - int type, - int protocol) { - return BidirectionalBindSocketPairCreator(/* abstract= */ true, domain, type, - protocol); -} - -Creator<SocketPair> SocketpairGoferSocketPairCreator(int domain, int type, - int protocol) { - return [=]() -> PosixErrorOr<std::unique_ptr<FDSocketPair>> { - struct sockaddr_un addr = {}; - constexpr char kSocketGoferPath[] = "/socket"; - memcpy(addr.sun_path, kSocketGoferPath, sizeof(kSocketGoferPath)); - addr.sun_family = domain; - - int sock1; - RETURN_ERROR_IF_SYSCALL_FAIL(sock1 = socket(domain, type, protocol)); - MaybeSave(); // Successful socket creation. - RETURN_ERROR_IF_SYSCALL_FAIL(connect( - sock1, reinterpret_cast<struct sockaddr*>(&addr), sizeof(addr))); - MaybeSave(); // Successful connect. - - int sock2; - RETURN_ERROR_IF_SYSCALL_FAIL(sock2 = socket(domain, type, protocol)); - MaybeSave(); // Successful socket creation. - RETURN_ERROR_IF_SYSCALL_FAIL(connect( - sock2, reinterpret_cast<struct sockaddr*>(&addr), sizeof(addr))); - MaybeSave(); // Successful connect. - - // Make and close another socketpair to ensure that the duped ends of the - // first socketpair get closed. - // - // The problem is that there is no way to atomically send and close an FD. - // The closest that we can do is send and then immediately close the FD, - // which is what we do in the gofer. The gofer won't respond to another - // request until the reply is sent and the FD is closed, so forcing the - // gofer to handle another request will ensure that this has happened. - for (int i = 0; i < 2; i++) { - int sock; - RETURN_ERROR_IF_SYSCALL_FAIL(sock = socket(domain, type, protocol)); - RETURN_ERROR_IF_SYSCALL_FAIL(connect( - sock, reinterpret_cast<struct sockaddr*>(&addr), sizeof(addr))); - RETURN_ERROR_IF_SYSCALL_FAIL(close(sock)); - } - - return absl::make_unique<FDSocketPair>(sock1, sock2); - }; -} - -Creator<SocketPair> SocketpairGoferFileSocketPairCreator(int flags) { - return [=]() -> PosixErrorOr<std::unique_ptr<FDSocketPair>> { - constexpr char kSocketGoferPath[] = "/socket"; - - int sock1; - RETURN_ERROR_IF_SYSCALL_FAIL(sock1 = - open(kSocketGoferPath, O_RDWR | flags)); - MaybeSave(); // Successful socket creation. - - int sock2; - RETURN_ERROR_IF_SYSCALL_FAIL(sock2 = - open(kSocketGoferPath, O_RDWR | flags)); - MaybeSave(); // Successful socket creation. - - return absl::make_unique<FDSocketPair>(sock1, sock2); - }; -} - -Creator<SocketPair> UnboundSocketPairCreator(bool abstract, int domain, - int type, int protocol) { - return [=]() -> PosixErrorOr<std::unique_ptr<AddrFDSocketPair>> { - ASSIGN_OR_RETURN_ERRNO(struct sockaddr_un addr1, - UniqueUnixAddr(abstract, domain)); - ASSIGN_OR_RETURN_ERRNO(struct sockaddr_un addr2, - UniqueUnixAddr(abstract, domain)); - - int sock1; - RETURN_ERROR_IF_SYSCALL_FAIL(sock1 = socket(domain, type, protocol)); - MaybeSave(); // Successful socket creation. - int sock2; - RETURN_ERROR_IF_SYSCALL_FAIL(sock2 = socket(domain, type, protocol)); - MaybeSave(); // Successful socket creation. - return absl::make_unique<AddrFDSocketPair>(sock1, sock2, addr1, addr2); - }; -} - -Creator<SocketPair> FilesystemUnboundSocketPairCreator(int domain, int type, - int protocol) { - return UnboundSocketPairCreator(/* abstract= */ false, domain, type, - protocol); -} - -Creator<SocketPair> AbstractUnboundSocketPairCreator(int domain, int type, - int protocol) { - return UnboundSocketPairCreator(/* abstract= */ true, domain, type, protocol); -} - -void LocalhostAddr(struct sockaddr_in* addr, bool dual_stack) { - addr->sin_family = AF_INET; - addr->sin_port = htons(0); - inet_pton(AF_INET, "127.0.0.1", - reinterpret_cast<void*>(&addr->sin_addr.s_addr)); -} - -void LocalhostAddr(struct sockaddr_in6* addr, bool dual_stack) { - addr->sin6_family = AF_INET6; - addr->sin6_port = htons(0); - if (dual_stack) { - inet_pton(AF_INET6, "::ffff:127.0.0.1", - reinterpret_cast<void*>(&addr->sin6_addr.s6_addr)); - } else { - inet_pton(AF_INET6, "::1", - reinterpret_cast<void*>(&addr->sin6_addr.s6_addr)); - } - addr->sin6_scope_id = 0; -} - -template <typename T> -PosixErrorOr<T> BindIP(int fd, bool dual_stack) { - T addr = {}; - LocalhostAddr(&addr, dual_stack); - RETURN_ERROR_IF_SYSCALL_FAIL( - bind(fd, reinterpret_cast<struct sockaddr*>(&addr), sizeof(addr))); - socklen_t addrlen = sizeof(addr); - RETURN_ERROR_IF_SYSCALL_FAIL( - getsockname(fd, reinterpret_cast<struct sockaddr*>(&addr), &addrlen)); - return addr; -} - -template <typename T> -PosixErrorOr<T> TCPBindAndListen(int fd, bool dual_stack) { - ASSIGN_OR_RETURN_ERRNO(T addr, BindIP<T>(fd, dual_stack)); - RETURN_ERROR_IF_SYSCALL_FAIL(listen(fd, /* backlog = */ 5)); - return addr; -} - -template <typename T> -PosixErrorOr<std::unique_ptr<AddrFDSocketPair>> -CreateTCPConnectAcceptSocketPair(int bound, int connected, int type, - bool dual_stack, T bind_addr) { - int connect_result = 0; - RETURN_ERROR_IF_SYSCALL_FAIL( - (connect_result = RetryEINTR(connect)( - connected, reinterpret_cast<struct sockaddr*>(&bind_addr), - sizeof(bind_addr))) == -1 && - errno == EINPROGRESS - ? 0 - : connect_result); - MaybeSave(); // Successful connect. - - if (connect_result == -1) { - struct pollfd connect_poll = {connected, POLLOUT | POLLERR | POLLHUP, 0}; - RETURN_ERROR_IF_SYSCALL_FAIL(RetryEINTR(poll)(&connect_poll, 1, 0)); - int error = 0; - socklen_t errorlen = sizeof(error); - RETURN_ERROR_IF_SYSCALL_FAIL( - getsockopt(connected, SOL_SOCKET, SO_ERROR, &error, &errorlen)); - errno = error; - RETURN_ERROR_IF_SYSCALL_FAIL( - /* connect */ error == 0 ? 0 : -1); - } - - int accepted = -1; - struct pollfd accept_poll = {bound, POLLIN, 0}; - while (accepted == -1) { - RETURN_ERROR_IF_SYSCALL_FAIL(RetryEINTR(poll)(&accept_poll, 1, 0)); - - RETURN_ERROR_IF_SYSCALL_FAIL( - (accepted = RetryEINTR(accept4)( - bound, nullptr, nullptr, type & (SOCK_NONBLOCK | SOCK_CLOEXEC))) == - -1 && - errno == EAGAIN - ? 0 - : accepted); - } - MaybeSave(); // Successful accept. - - // FIXME(b/110484944) - if (connect_result == -1) { - absl::SleepFor(absl::Seconds(1)); - } - - T extra_addr = {}; - LocalhostAddr(&extra_addr, dual_stack); - return absl::make_unique<AddrFDSocketPair>(connected, accepted, bind_addr, - extra_addr); -} - -template <typename T> -PosixErrorOr<std::unique_ptr<AddrFDSocketPair>> CreateTCPAcceptBindSocketPair( - int bound, int connected, int type, bool dual_stack) { - ASSIGN_OR_RETURN_ERRNO(T bind_addr, TCPBindAndListen<T>(bound, dual_stack)); - - auto result = CreateTCPConnectAcceptSocketPair(bound, connected, type, - dual_stack, bind_addr); - - // Cleanup no longer needed resources. - RETURN_ERROR_IF_SYSCALL_FAIL(close(bound)); - MaybeSave(); // Successful close. - - return result; -} - -Creator<SocketPair> TCPAcceptBindSocketPairCreator(int domain, int type, - int protocol, - bool dual_stack) { - return [=]() -> PosixErrorOr<std::unique_ptr<AddrFDSocketPair>> { - int bound; - RETURN_ERROR_IF_SYSCALL_FAIL(bound = socket(domain, type, protocol)); - MaybeSave(); // Successful socket creation. - - int connected; - RETURN_ERROR_IF_SYSCALL_FAIL(connected = socket(domain, type, protocol)); - MaybeSave(); // Successful socket creation. - - if (domain == AF_INET) { - return CreateTCPAcceptBindSocketPair<sockaddr_in>(bound, connected, type, - dual_stack); - } - return CreateTCPAcceptBindSocketPair<sockaddr_in6>(bound, connected, type, - dual_stack); - }; -} - -Creator<SocketPair> TCPAcceptBindPersistentListenerSocketPairCreator( - int domain, int type, int protocol, bool dual_stack) { - // These are lazily initialized below, on the first call to the returned - // lambda. These values are private to each returned lambda, but shared across - // invocations of a specific lambda. - // - // The sharing allows pairs created with the same parameters to share a - // listener. This prevents future connects from failing if the connecting - // socket selects a port which had previously been used by a listening socket - // that still has some connections in TIME-WAIT. - // - // The lazy initialization is to avoid creating sockets during parameter - // enumeration. This is important because parameters are enumerated during the - // build process where networking may not be available. - auto listener = std::make_shared<absl::optional<int>>(absl::optional<int>()); - auto addr4 = std::make_shared<absl::optional<sockaddr_in>>( - absl::optional<sockaddr_in>()); - auto addr6 = std::make_shared<absl::optional<sockaddr_in6>>( - absl::optional<sockaddr_in6>()); - - return [=]() -> PosixErrorOr<std::unique_ptr<AddrFDSocketPair>> { - int connected; - RETURN_ERROR_IF_SYSCALL_FAIL(connected = socket(domain, type, protocol)); - MaybeSave(); // Successful socket creation. - - // Share the listener across invocations. - if (!listener->has_value()) { - int fd = socket(domain, type, protocol); - if (fd < 0) { - return PosixError(errno, absl::StrCat("socket(", domain, ", ", type, - ", ", protocol, ")")); - } - listener->emplace(fd); - MaybeSave(); // Successful socket creation. - } - - // Bind the listener once, but create a new connect/accept pair each - // time. - if (domain == AF_INET) { - if (!addr4->has_value()) { - addr4->emplace( - TCPBindAndListen<sockaddr_in>(listener->value(), dual_stack) - .ValueOrDie()); - } - return CreateTCPConnectAcceptSocketPair(listener->value(), connected, - type, dual_stack, addr4->value()); - } - if (!addr6->has_value()) { - addr6->emplace( - TCPBindAndListen<sockaddr_in6>(listener->value(), dual_stack) - .ValueOrDie()); - } - return CreateTCPConnectAcceptSocketPair(listener->value(), connected, type, - dual_stack, addr6->value()); - }; -} - -template <typename T> -PosixErrorOr<std::unique_ptr<AddrFDSocketPair>> CreateUDPBoundSocketPair( - int sock1, int sock2, int type, bool dual_stack) { - ASSIGN_OR_RETURN_ERRNO(T addr1, BindIP<T>(sock1, dual_stack)); - ASSIGN_OR_RETURN_ERRNO(T addr2, BindIP<T>(sock2, dual_stack)); - - return absl::make_unique<AddrFDSocketPair>(sock1, sock2, addr1, addr2); -} - -template <typename T> -PosixErrorOr<std::unique_ptr<AddrFDSocketPair>> -CreateUDPBidirectionalBindSocketPair(int sock1, int sock2, int type, - bool dual_stack) { - ASSIGN_OR_RETURN_ERRNO( - auto socks, CreateUDPBoundSocketPair<T>(sock1, sock2, type, dual_stack)); - - // Connect sock1 to sock2. - RETURN_ERROR_IF_SYSCALL_FAIL(connect(socks->first_fd(), socks->second_addr(), - socks->second_addr_size())); - MaybeSave(); // Successful connection. - - // Connect sock2 to sock1. - RETURN_ERROR_IF_SYSCALL_FAIL(connect(socks->second_fd(), socks->first_addr(), - socks->first_addr_size())); - MaybeSave(); // Successful connection. - - return socks; -} - -Creator<SocketPair> UDPBidirectionalBindSocketPairCreator(int domain, int type, - int protocol, - bool dual_stack) { - return [=]() -> PosixErrorOr<std::unique_ptr<AddrFDSocketPair>> { - int sock1; - RETURN_ERROR_IF_SYSCALL_FAIL(sock1 = socket(domain, type, protocol)); - MaybeSave(); // Successful socket creation. - - int sock2; - RETURN_ERROR_IF_SYSCALL_FAIL(sock2 = socket(domain, type, protocol)); - MaybeSave(); // Successful socket creation. - - if (domain == AF_INET) { - return CreateUDPBidirectionalBindSocketPair<sockaddr_in>( - sock1, sock2, type, dual_stack); - } - return CreateUDPBidirectionalBindSocketPair<sockaddr_in6>(sock1, sock2, - type, dual_stack); - }; -} - -Creator<SocketPair> UDPUnboundSocketPairCreator(int domain, int type, - int protocol, bool dual_stack) { - return [=]() -> PosixErrorOr<std::unique_ptr<FDSocketPair>> { - int sock1; - RETURN_ERROR_IF_SYSCALL_FAIL(sock1 = socket(domain, type, protocol)); - MaybeSave(); // Successful socket creation. - - int sock2; - RETURN_ERROR_IF_SYSCALL_FAIL(sock2 = socket(domain, type, protocol)); - MaybeSave(); // Successful socket creation. - - return absl::make_unique<FDSocketPair>(sock1, sock2); - }; -} - -SocketPairKind Reversed(SocketPairKind const& base) { - auto const& creator = base.creator; - return SocketPairKind{ - absl::StrCat("reversed ", base.description), base.domain, base.type, - base.protocol, - [creator]() -> PosixErrorOr<std::unique_ptr<ReversedSocketPair>> { - ASSIGN_OR_RETURN_ERRNO(auto creator_value, creator()); - return absl::make_unique<ReversedSocketPair>(std::move(creator_value)); - }}; -} - -Creator<FileDescriptor> UnboundSocketCreator(int domain, int type, - int protocol) { - return [=]() -> PosixErrorOr<std::unique_ptr<FileDescriptor>> { - int sock; - RETURN_ERROR_IF_SYSCALL_FAIL(sock = socket(domain, type, protocol)); - MaybeSave(); // Successful socket creation. - - return absl::make_unique<FileDescriptor>(sock); - }; -} - -std::vector<SocketPairKind> IncludeReversals(std::vector<SocketPairKind> vec) { - return ApplyVecToVec<SocketPairKind>(std::vector<Middleware>{NoOp, Reversed}, - vec); -} - -SocketPairKind NoOp(SocketPairKind const& base) { return base; } - -void TransferTest(int fd1, int fd2) { - char buf1[20]; - RandomizeBuffer(buf1, sizeof(buf1)); - ASSERT_THAT(WriteFd(fd1, buf1, sizeof(buf1)), - SyscallSucceedsWithValue(sizeof(buf1))); - - char buf2[20]; - ASSERT_THAT(ReadFd(fd2, buf2, sizeof(buf2)), - SyscallSucceedsWithValue(sizeof(buf2))); - - EXPECT_EQ(0, memcmp(buf1, buf2, sizeof(buf1))); - - RandomizeBuffer(buf1, sizeof(buf1)); - ASSERT_THAT(WriteFd(fd2, buf1, sizeof(buf1)), - SyscallSucceedsWithValue(sizeof(buf1))); - - ASSERT_THAT(ReadFd(fd1, buf2, sizeof(buf2)), - SyscallSucceedsWithValue(sizeof(buf2))); - - EXPECT_EQ(0, memcmp(buf1, buf2, sizeof(buf1))); -} - -// Initializes the given buffer with random data. -void RandomizeBuffer(char* ptr, size_t len) { - uint32_t seed = time(nullptr); - for (size_t i = 0; i < len; ++i) { - ptr[i] = static_cast<char>(rand_r(&seed)); - } -} - -size_t CalculateUnixSockAddrLen(const char* sun_path) { - // Abstract addresses always return the full length. - if (sun_path[0] == 0) { - return sizeof(sockaddr_un); - } - // Filesystem addresses use the address length plus the 2 byte sun_family - // and null terminator. - return strlen(sun_path) + 3; -} - -struct sockaddr_storage AddrFDSocketPair::to_storage(const sockaddr_un& addr) { - struct sockaddr_storage addr_storage = {}; - memcpy(&addr_storage, &addr, sizeof(addr)); - return addr_storage; -} - -struct sockaddr_storage AddrFDSocketPair::to_storage(const sockaddr_in& addr) { - struct sockaddr_storage addr_storage = {}; - memcpy(&addr_storage, &addr, sizeof(addr)); - return addr_storage; -} - -struct sockaddr_storage AddrFDSocketPair::to_storage(const sockaddr_in6& addr) { - struct sockaddr_storage addr_storage = {}; - memcpy(&addr_storage, &addr, sizeof(addr)); - return addr_storage; -} - -SocketKind SimpleSocket(int fam, int type, int proto) { - return SocketKind{ - absl::StrCat("Family ", fam, ", type ", type, ", proto ", proto), fam, - type, proto, SyscallSocketCreator(fam, type, proto)}; -} - -ssize_t SendLargeSendMsg(const std::unique_ptr<SocketPair>& sockets, - size_t size, bool reader) { - const int rfd = sockets->second_fd(); - ScopedThread t([rfd, size, reader] { - if (!reader) { - return; - } - - // Potentially too many syscalls in the loop. - const DisableSave ds; - - std::vector<char> buf(size); - size_t total = 0; - - while (total < size) { - int ret = read(rfd, buf.data(), buf.size()); - if (ret == -1 && errno == EAGAIN) { - continue; - } - if (ret > 0) { - total += ret; - } - - // Assert to return on first failure. - ASSERT_THAT(ret, SyscallSucceeds()); - } - }); - - std::vector<char> buf(size); - - struct iovec iov = {}; - iov.iov_base = buf.data(); - iov.iov_len = buf.size(); - - struct msghdr msg = {}; - msg.msg_iov = &iov; - msg.msg_iovlen = 1; - - return RetryEINTR(sendmsg)(sockets->first_fd(), &msg, 0); -} - -namespace internal { -PosixErrorOr<int> TryPortAvailable(int port, AddressFamily family, - SocketType type, bool reuse_addr) { - if (port < 0) { - return PosixError(EINVAL, "Invalid port"); - } - - // Both Ipv6 and Dualstack are AF_INET6. - int sock_fam = (family == AddressFamily::kIpv4 ? AF_INET : AF_INET6); - int sock_type = (type == SocketType::kTcp ? SOCK_STREAM : SOCK_DGRAM); - ASSIGN_OR_RETURN_ERRNO(auto fd, Socket(sock_fam, sock_type, 0)); - - if (reuse_addr) { - int one = 1; - RETURN_ERROR_IF_SYSCALL_FAIL( - setsockopt(fd.get(), SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))); - } - - // Try to bind. - sockaddr_storage storage = {}; - int storage_size = 0; - if (family == AddressFamily::kIpv4) { - sockaddr_in* addr = reinterpret_cast<sockaddr_in*>(&storage); - storage_size = sizeof(*addr); - addr->sin_family = AF_INET; - addr->sin_port = htons(port); - addr->sin_addr.s_addr = htonl(INADDR_ANY); - } else { - sockaddr_in6* addr = reinterpret_cast<sockaddr_in6*>(&storage); - storage_size = sizeof(*addr); - addr->sin6_family = AF_INET6; - addr->sin6_port = htons(port); - if (family == AddressFamily::kDualStack) { - inet_pton(AF_INET6, "::ffff:0.0.0.0", - reinterpret_cast<void*>(&addr->sin6_addr.s6_addr)); - } else { - addr->sin6_addr = in6addr_any; - } - } - - RETURN_ERROR_IF_SYSCALL_FAIL( - bind(fd.get(), reinterpret_cast<sockaddr*>(&storage), storage_size)); - - // If the user specified 0 as the port, we will return the port that the - // kernel gave us, otherwise we will validate that this socket bound to the - // requested port. - sockaddr_storage bound_storage = {}; - socklen_t bound_storage_size = sizeof(bound_storage); - RETURN_ERROR_IF_SYSCALL_FAIL( - getsockname(fd.get(), reinterpret_cast<sockaddr*>(&bound_storage), - &bound_storage_size)); - - int available_port = -1; - if (bound_storage.ss_family == AF_INET) { - sockaddr_in* addr = reinterpret_cast<sockaddr_in*>(&bound_storage); - available_port = ntohs(addr->sin_port); - } else if (bound_storage.ss_family == AF_INET6) { - sockaddr_in6* addr = reinterpret_cast<sockaddr_in6*>(&bound_storage); - available_port = ntohs(addr->sin6_port); - } else { - return PosixError(EPROTOTYPE, "Getsockname returned invalid family"); - } - - // If we requested a specific port make sure our bound port is that port. - if (port != 0 && available_port != port) { - return PosixError(EINVAL, - absl::StrCat("Bound port ", available_port, - " was not equal to requested port ", port)); - } - - // If we're trying to do a TCP socket, let's also try to listen. - if (type == SocketType::kTcp) { - RETURN_ERROR_IF_SYSCALL_FAIL(listen(fd.get(), 1)); - } - - return available_port; -} -} // namespace internal - -PosixErrorOr<int> SendMsg(int sock, msghdr* msg, char buf[], int buf_size) { - struct iovec iov; - iov.iov_base = buf; - iov.iov_len = buf_size; - msg->msg_iov = &iov; - msg->msg_iovlen = 1; - - int ret; - RETURN_ERROR_IF_SYSCALL_FAIL(ret = RetryEINTR(sendmsg)(sock, msg, 0)); - return ret; -} - -void RecvNoData(int sock) { - char data = 0; - struct iovec iov; - iov.iov_base = &data; - iov.iov_len = 1; - struct msghdr msg = {}; - msg.msg_iov = &iov; - msg.msg_iovlen = 1; - ASSERT_THAT(RetryEINTR(recvmsg)(sock, &msg, MSG_DONTWAIT), - SyscallFailsWithErrno(EAGAIN)); -} - -TestAddress V4Any() { - TestAddress t("V4Any"); - t.addr.ss_family = AF_INET; - t.addr_len = sizeof(sockaddr_in); - reinterpret_cast<sockaddr_in*>(&t.addr)->sin_addr.s_addr = htonl(INADDR_ANY); - return t; -} - -TestAddress V4Loopback() { - TestAddress t("V4Loopback"); - t.addr.ss_family = AF_INET; - t.addr_len = sizeof(sockaddr_in); - reinterpret_cast<sockaddr_in*>(&t.addr)->sin_addr.s_addr = - htonl(INADDR_LOOPBACK); - return t; -} - -TestAddress V4MappedAny() { - TestAddress t("V4MappedAny"); - t.addr.ss_family = AF_INET6; - t.addr_len = sizeof(sockaddr_in6); - inet_pton(AF_INET6, "::ffff:0.0.0.0", - reinterpret_cast<sockaddr_in6*>(&t.addr)->sin6_addr.s6_addr); - return t; -} - -TestAddress V4MappedLoopback() { - TestAddress t("V4MappedLoopback"); - t.addr.ss_family = AF_INET6; - t.addr_len = sizeof(sockaddr_in6); - inet_pton(AF_INET6, "::ffff:127.0.0.1", - reinterpret_cast<sockaddr_in6*>(&t.addr)->sin6_addr.s6_addr); - return t; -} - -TestAddress V6Any() { - TestAddress t("V6Any"); - t.addr.ss_family = AF_INET6; - t.addr_len = sizeof(sockaddr_in6); - reinterpret_cast<sockaddr_in6*>(&t.addr)->sin6_addr = in6addr_any; - return t; -} - -TestAddress V6Loopback() { - TestAddress t("V6Loopback"); - t.addr.ss_family = AF_INET6; - t.addr_len = sizeof(sockaddr_in6); - reinterpret_cast<sockaddr_in6*>(&t.addr)->sin6_addr = in6addr_loopback; - return t; -} - -// Checksum computes the internet checksum of a buffer. -uint16_t Checksum(uint16_t* buf, ssize_t buf_size) { - // Add up the 16-bit values in the buffer. - uint32_t total = 0; - for (unsigned int i = 0; i < buf_size; i += sizeof(*buf)) { - total += *buf; - buf++; - } - - // If buf has an odd size, add the remaining byte. - if (buf_size % 2) { - total += *(reinterpret_cast<unsigned char*>(buf) - 1); - } - - // This carries any bits past the lower 16 until everything fits in 16 bits. - while (total >> 16) { - uint16_t lower = total & 0xffff; - uint16_t upper = total >> 16; - total = lower + upper; - } - - return ~total; -} - -uint16_t IPChecksum(struct iphdr ip) { - return Checksum(reinterpret_cast<uint16_t*>(&ip), sizeof(ip)); -} - -// The pseudo-header defined in RFC 768 for calculating the UDP checksum. -struct udp_pseudo_hdr { - uint32_t srcip; - uint32_t destip; - char zero; - char protocol; - uint16_t udplen; -}; - -uint16_t UDPChecksum(struct iphdr iphdr, struct udphdr udphdr, - const char* payload, ssize_t payload_len) { - struct udp_pseudo_hdr phdr = {}; - phdr.srcip = iphdr.saddr; - phdr.destip = iphdr.daddr; - phdr.zero = 0; - phdr.protocol = IPPROTO_UDP; - phdr.udplen = udphdr.len; - - ssize_t buf_size = sizeof(phdr) + sizeof(udphdr) + payload_len; - char* buf = static_cast<char*>(malloc(buf_size)); - memcpy(buf, &phdr, sizeof(phdr)); - memcpy(buf + sizeof(phdr), &udphdr, sizeof(udphdr)); - memcpy(buf + sizeof(phdr) + sizeof(udphdr), payload, payload_len); - - uint16_t csum = Checksum(reinterpret_cast<uint16_t*>(buf), buf_size); - free(buf); - return csum; -} - -uint16_t ICMPChecksum(struct icmphdr icmphdr, const char* payload, - ssize_t payload_len) { - ssize_t buf_size = sizeof(icmphdr) + payload_len; - char* buf = static_cast<char*>(malloc(buf_size)); - memcpy(buf, &icmphdr, sizeof(icmphdr)); - memcpy(buf + sizeof(icmphdr), payload, payload_len); - - uint16_t csum = Checksum(reinterpret_cast<uint16_t*>(buf), buf_size); - free(buf); - return csum; -} - -} // namespace testing -} // namespace gvisor |