blob: b0efe349a4aaa5e649fb74bd2688dfe3d3587507 [file] [log] [blame]
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#include "bin/builtin.h"
#include "bin/dartutils.h"
#include "bin/file.h"
#include "bin/reference_counting.h"
#include "bin/socket_base.h"
#include "bin/thread.h"
#include "bin/utils.h"
#include "platform/hashmap.h"
namespace dart {
namespace bin {
// TODO(bkonyi): Socket should also inherit from SocketBase once it is
// refactored to use instance methods when possible.
// We write Sockets into the native field of the _NativeSocket object
// on the Dart side. They are allocated in SetSocketIdNativeField(), and are
// deallocated either from the finalizer attached to _NativeSockets there, or
// from the eventhandler, whichever drops the last reference.
class Socket : public ReferenceCounted<Socket> {
enum SocketRequest {
kLookupRequest = 0,
kListInterfacesRequest = 1,
kReverseLookupRequest = 2,
enum SocketFinalizer {
// Keep in sync with constants in _NativeSocket in socket_patch.dart.
enum SocketType {
kTcpSocket = 18,
kUdpSocket = 19,
kInternalSocket = 20,
kInternalSignalSocket = 21,
explicit Socket(intptr_t fd);
intptr_t fd() const { return fd_; }
// Close fd and may need to decrement the count of handle by calling
// release().
void CloseFd();
// Set fd_ to closed. On fuchsia and win, shared socket should not
// release handle but only SetClosedFd().
void SetClosedFd();
Dart_Port isolate_port() const { return isolate_port_; }
Dart_Port port() const { return port_; }
void set_port(Dart_Port port) { port_ = port; }
uint8_t* udp_receive_buffer() const { return udp_receive_buffer_; }
void set_udp_receive_buffer(uint8_t* buffer) { udp_receive_buffer_ = buffer; }
static bool Initialize();
// Creates a socket which is bound and connected. The port to connect to is
// specified as the port component of the passed RawAddr structure.
static intptr_t CreateConnect(const RawAddr& addr);
static intptr_t CreateUnixDomainConnect(const RawAddr& addr);
// Creates a socket which is bound and connected. The port to connect to is
// specified as the port component of the passed RawAddr structure.
static intptr_t CreateBindConnect(const RawAddr& addr,
const RawAddr& source_addr);
static intptr_t CreateUnixDomainBindConnect(const RawAddr& addr,
const RawAddr& source_addr);
// Creates a datagram socket which is bound. The port to bind
// to is specified as the port component of the RawAddr structure.
static intptr_t CreateBindDatagram(const RawAddr& addr,
bool reuseAddress,
bool reusePort,
int ttl = 1);
static CObject* LookupRequest(const CObjectArray& request);
static CObject* ListInterfacesRequest(const CObjectArray& request);
static CObject* ReverseLookupRequest(const CObjectArray& request);
static Dart_Port GetServicePort();
static void SetSocketIdNativeField(Dart_Handle handle,
intptr_t id,
SocketFinalizer finalizer);
static void ReuseSocketIdNativeField(Dart_Handle handle,
Socket* socket,
SocketFinalizer finalizer);
static Socket* GetSocketIdNativeField(Dart_Handle socket);
static bool short_socket_read() { return short_socket_read_; }
static void set_short_socket_read(bool short_socket_read) {
short_socket_read_ = short_socket_read;
static bool short_socket_write() { return short_socket_write_; }
static void set_short_socket_write(bool short_socket_write) {
short_socket_write_ = short_socket_write;
static bool IsSignalSocketFlag(intptr_t flag) {
return ((flag & (0x1 << kInternalSignalSocket)) != 0);
~Socket() {
ASSERT(fd_ == kClosedFd);
udp_receive_buffer_ = NULL;
static const int kClosedFd = -1;
static bool short_socket_read_;
static bool short_socket_write_;
intptr_t fd_;
Dart_Port isolate_port_;
Dart_Port port_;
uint8_t* udp_receive_buffer_;
friend class ReferenceCounted<Socket>;
class ServerSocket {
static const intptr_t kTemporaryFailure = -2;
static intptr_t Accept(intptr_t fd);
// Creates a socket which is bound and listens. The port to listen on is
// specified in the port component of the passed RawAddr structure.
// Returns a positive integer if the call is successful. In case of failure
// it returns:
// -1: system error (errno set)
// -5: invalid bindAddress
static intptr_t CreateBindListen(const RawAddr& addr,
intptr_t backlog,
bool v6_only = false);
static intptr_t CreateUnixDomainBindListen(const RawAddr& addr,
intptr_t backlog);
// Start accepting on a newly created listening socket. If it was unable to
// start accepting incoming sockets, the fd is invalidated.
static bool StartAccept(intptr_t fd);
class ListeningSocketRegistry {
: sockets_by_port_(SameIntptrValue, kInitialSocketsCount),
sockets_by_fd_(SameIntptrValue, kInitialSocketsCount),
mutex_() {}
~ListeningSocketRegistry() {
static void Initialize();
static ListeningSocketRegistry* Instance();
static void Cleanup();
// Bind `socket_object` to `addr`.
// Return Dart_True() if succeed.
// This function should be called from a dart runtime call in order to create
// a new (potentially shared) socket.
Dart_Handle CreateBindListen(Dart_Handle socket_object,
RawAddr addr,
intptr_t backlog,
bool v6_only,
bool shared);
// Bind unix domain socket`socket_object` to `path`.
// Return Dart_True() if succeed.
// This function should be called from a dart runtime call in order to create
// a new socket.
Dart_Handle CreateUnixDomainBindListen(Dart_Handle socket_object,
Namespace* namespc,
const char* path,
intptr_t backlog,
bool shared);
// This should be called from the event handler for every kCloseEvent it gets
// on listening sockets.
// Returns `true` if the last reference has been dropped and the underlying
// socket can be closed.
// The caller is responsible for obtaining the mutex first, before calling
// this function.
bool CloseSafe(Socket* socketfd);
Mutex* mutex() { return &mutex_; }
struct OSSocket {
RawAddr address;
int port;
bool v6_only;
bool shared;
int ref_count;
intptr_t fd;
// Only applicable to Unix domain socket, where address.addr.sa_family
// == AF_UNIX.
Namespace* namespc;
// Singly linked lists of OSSocket instances which listen on the same port
// but on different addresses.
OSSocket* next;
OSSocket(RawAddr address,
int port,
bool v6_only,
bool shared,
Socket* socketfd,
Namespace* namespc)
: address(address),
next(NULL) {
fd = socketfd->fd();
static const intptr_t kInitialSocketsCount = 8;
OSSocket* FindOSSocketWithAddress(OSSocket* current, const RawAddr& addr) {
while (current != NULL) {
if (SocketAddress::AreAddressesEqual(current->address, addr)) {
return current;
current = current->next;
return NULL;
OSSocket* FindOSSocketWithPath(OSSocket* current,
Namespace* namespc,
const char* path) {
while (current != NULL) {
ASSERT(current->address.addr.sa_family == AF_UNIX);
#if defined(DART_HOST_OS_LINUX) || defined(DART_HOST_OS_ANDROID)
bool condition;
if (path[0] == '\0') {
condition = current->address.un.sun_path[0] == '\0' &&
strcmp(&(current->address.un.sun_path[1]), path + 1) == 0;
} else {
condition =
File::AreIdentical(current->namespc, current->address.un.sun_path,
namespc, path) == File::kIdentical;
if (condition) {
return current;
if (File::AreIdentical(current->namespc, current->address.un.sun_path,
namespc, path) == File::kIdentical) {
return current;
#endif // defined(DART_HOST_OS_LINUX) || defined(DART_HOST_OS_ANDROID)
current = current->next;
return NULL;
static bool SameIntptrValue(void* key1, void* key2) {
return reinterpret_cast<intptr_t>(key1) == reinterpret_cast<intptr_t>(key2);
static uint32_t GetHashmapHashFromIntptr(intptr_t i) {
return static_cast<uint32_t>((i + 1) & 0xFFFFFFFF);
static void* GetHashmapKeyFromIntptr(intptr_t i) {
return reinterpret_cast<void*>(i + 1);
OSSocket* LookupByPort(intptr_t port);
void InsertByPort(intptr_t port, OSSocket* socket);
void RemoveByPort(intptr_t port);
OSSocket* LookupByFd(Socket* fd);
void InsertByFd(Socket* fd, OSSocket* socket);
void RemoveByFd(Socket* fd);
bool CloseOneSafe(OSSocket* os_socket, Socket* socket);
void CloseAllSafe();
SimpleHashMap sockets_by_port_;
SimpleHashMap sockets_by_fd_;
OSSocket* unix_domain_sockets_;
Mutex mutex_;
} // namespace bin
} // namespace dart