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608 lines (533 loc) · 19.4 KB
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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
#include "tcp_wrap.h"
#ifdef _WIN32
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
#include <cerrno>
#include <cstdlib>
#include "connect_wrap.h"
#include "connection_wrap.h"
#include "env-inl.h"
#include "handle_wrap.h"
#include "node_buffer.h"
#include "node_external_reference.h"
#include "node_internals.h"
#include "permission/permission.h"
#include "stream_base-inl.h"
#include "stream_wrap.h"
#include "util-inl.h"
#ifndef _WIN32
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <sys/socket.h>
#endif
namespace node {
using v8::Boolean;
using v8::Context;
using v8::EscapableHandleScope;
using v8::Function;
using v8::FunctionCallbackInfo;
using v8::FunctionTemplate;
using v8::Int32;
using v8::Integer;
using v8::Isolate;
using v8::Local;
using v8::MaybeLocal;
using v8::Object;
using v8::String;
using v8::Uint32;
using v8::Value;
MaybeLocal<Object> TCPWrap::Instantiate(Environment* env,
AsyncWrap* parent,
TCPWrap::SocketType type) {
EscapableHandleScope handle_scope(env->isolate());
AsyncHooks::DefaultTriggerAsyncIdScope trigger_scope(parent);
CHECK_EQ(env->tcp_constructor_template().IsEmpty(), false);
Local<Function> constructor;
if (!env->tcp_constructor_template()
->GetFunction(env->context())
.ToLocal(&constructor)) {
return {};
}
Local<Value> type_value = Int32::New(env->isolate(), type);
return handle_scope.EscapeMaybe(
constructor->NewInstance(env->context(), 1, &type_value));
}
void TCPWrap::Initialize(Local<Object> target,
Local<Value> unused,
Local<Context> context,
void* priv) {
Environment* env = Environment::GetCurrent(context);
Isolate* isolate = env->isolate();
Local<FunctionTemplate> t = NewFunctionTemplate(isolate, New);
t->InstanceTemplate()->SetInternalFieldCount(TCPWrap::kInternalFieldCount);
// Init properties
t->InstanceTemplate()->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "reading"),
Boolean::New(env->isolate(), false));
t->InstanceTemplate()->Set(env->owner_symbol(), Null(env->isolate()));
t->InstanceTemplate()->Set(env->onconnection_string(), Null(env->isolate()));
t->Inherit(LibuvStreamWrap::GetConstructorTemplate(env));
SetProtoMethod(isolate, t, "open", Open);
SetProtoMethod(isolate, t, "bind", Bind);
SetProtoMethod(isolate, t, "listen", Listen);
SetProtoMethod(isolate, t, "connect", Connect);
SetProtoMethod(isolate, t, "bind6", Bind6);
SetProtoMethod(isolate, t, "connect6", Connect6);
SetProtoMethod(isolate,
t,
"getsockname",
GetSockOrPeerName<TCPWrap, uv_tcp_getsockname>);
SetProtoMethod(isolate,
t,
"getpeername",
GetSockOrPeerName<TCPWrap, uv_tcp_getpeername>);
SetProtoMethod(isolate, t, "setNoDelay", SetNoDelay);
SetProtoMethod(isolate, t, "setKeepAlive", SetKeepAlive);
SetProtoMethod(isolate, t, "setTypeOfService", SetTypeOfService);
SetProtoMethod(isolate, t, "getTypeOfService", GetTypeOfService);
SetProtoMethod(isolate, t, "reset", Reset);
#ifdef _WIN32
SetProtoMethod(isolate, t, "setSimultaneousAccepts", SetSimultaneousAccepts);
#endif
SetConstructorFunction(context, target, "TCP", t);
env->set_tcp_constructor_template(t);
// Create FunctionTemplate for TCPConnectWrap.
Local<FunctionTemplate> cwt = AsyncWrap::MakeLazilyInitializedJSTemplate(env);
SetConstructorFunction(context, target, "TCPConnectWrap", cwt);
// Define constants
Local<Object> constants = Object::New(env->isolate());
NODE_DEFINE_CONSTANT(constants, SOCKET);
NODE_DEFINE_CONSTANT(constants, SERVER);
NODE_DEFINE_CONSTANT(constants, UV_TCP_IPV6ONLY);
NODE_DEFINE_CONSTANT(constants, UV_TCP_REUSEPORT);
target->Set(context, env->constants_string(), constants).Check();
}
void TCPWrap::RegisterExternalReferences(ExternalReferenceRegistry* registry) {
registry->Register(New);
registry->Register(Open);
registry->Register(Bind);
registry->Register(Listen);
registry->Register(Connect);
registry->Register(Bind6);
registry->Register(Connect6);
registry->Register(GetSockOrPeerName<TCPWrap, uv_tcp_getsockname>);
registry->Register(GetSockOrPeerName<TCPWrap, uv_tcp_getpeername>);
registry->Register(SetNoDelay);
registry->Register(SetKeepAlive);
registry->Register(SetTypeOfService);
registry->Register(GetTypeOfService);
registry->Register(Reset);
#ifdef _WIN32
registry->Register(SetSimultaneousAccepts);
#endif
}
void TCPWrap::New(const FunctionCallbackInfo<Value>& args) {
// This constructor should not be exposed to public javascript.
// Therefore we assert that we are not trying to call this as a
// normal function.
CHECK(args.IsConstructCall());
CHECK(args[0]->IsInt32());
Environment* env = Environment::GetCurrent(args);
int type_value = args[0].As<Int32>()->Value();
TCPWrap::SocketType type = static_cast<TCPWrap::SocketType>(type_value);
ProviderType provider;
switch (type) {
case SOCKET:
provider = PROVIDER_TCPWRAP;
break;
case SERVER:
provider = PROVIDER_TCPSERVERWRAP;
break;
default:
UNREACHABLE();
}
new TCPWrap(env, args.This(), provider);
}
TCPWrap::TCPWrap(Environment* env, Local<Object> object, ProviderType provider)
: ConnectionWrap(env, object, provider) {
int r = uv_tcp_init(env->event_loop(), &handle_);
CHECK_EQ(r, 0); // How do we proxy this error up to javascript?
// Suggestion: uv_tcp_init() returns void.
}
void TCPWrap::SetNoDelay(const FunctionCallbackInfo<Value>& args) {
TCPWrap* wrap;
ASSIGN_OR_RETURN_UNWRAP(
&wrap, args.This(), args.GetReturnValue().Set(UV_EBADF));
int enable = static_cast<int>(args[0]->IsTrue());
int err = uv_tcp_nodelay(&wrap->handle_, enable);
args.GetReturnValue().Set(err);
}
void TCPWrap::SetKeepAlive(const FunctionCallbackInfo<Value>& args) {
TCPWrap* wrap;
ASSIGN_OR_RETURN_UNWRAP(
&wrap, args.This(), args.GetReturnValue().Set(UV_EBADF));
Environment* env = wrap->env();
int enable;
if (!args[0]->Int32Value(env->context()).To(&enable)) return;
unsigned int delay = static_cast<unsigned int>(args[1].As<Uint32>()->Value());
int err = uv_tcp_keepalive(&wrap->handle_, enable, delay);
args.GetReturnValue().Set(err);
}
// TODO(amyssnippet): This implementation uses raw setsockopt/getsockopt calls
// as a temporary measure. Upstream support is tracked in
// https://github.com/libuv/libuv/issues/5011.
// Once uv_tcp_set_tos and uv_tcp_get_tos are available in libuv,
// this should be refactored to use those APIs.
void TCPWrap::SetTypeOfService(const FunctionCallbackInfo<Value>& args) {
TCPWrap* wrap;
ASSIGN_OR_RETURN_UNWRAP(
&wrap, args.This(), args.GetReturnValue().Set(UV_EBADF));
Environment* env = wrap->env();
int tos = 0;
if (!args[0]->Int32Value(env->context()).To(&tos)) return;
uv_os_fd_t fd;
int err = uv_fileno(reinterpret_cast<uv_handle_t*>(&wrap->handle_), &fd);
if (err != 0) {
args.GetReturnValue().Set(err);
return;
}
// 1. Detect the socket family (IPv4 vs IPv6)
sockaddr_storage storage;
int addrlen = sizeof(storage);
int sock_err = uv_tcp_getsockname(
&wrap->handle_, reinterpret_cast<sockaddr*>(&storage), &addrlen);
// If we can't determine the family (e.g. closed socket), fail gracefully.
if (sock_err != 0) {
args.GetReturnValue().Set(sock_err);
return;
}
// 2. Select the correct protocol level and option name
int level;
int option;
if (storage.ss_family == AF_INET) {
level = IPPROTO_IP;
option = IP_TOS;
} else if (storage.ss_family == AF_INET6) {
level = IPPROTO_IPV6;
option = IPV6_TCLASS;
} else {
// Unsupported socket family (e.g. AF_UNIX)
args.GetReturnValue().Set(UV_EINVAL);
return;
}
// 3. Perform the system call (Platform specific casting)
#ifdef _WIN32
if (setsockopt(reinterpret_cast<::SOCKET>(fd),
level,
option,
reinterpret_cast<const char*>(&tos),
static_cast<int>(sizeof(tos))) == 0) {
args.GetReturnValue().Set(0);
} else {
args.GetReturnValue().Set(uv_translate_sys_error(WSAGetLastError()));
}
#else
if (setsockopt(fd, level, option, &tos, sizeof(tos)) == 0) {
args.GetReturnValue().Set(0);
} else {
args.GetReturnValue().Set(uv_translate_sys_error(errno));
}
#endif
}
void TCPWrap::GetTypeOfService(const FunctionCallbackInfo<Value>& args) {
TCPWrap* wrap;
ASSIGN_OR_RETURN_UNWRAP(
&wrap, args.This(), args.GetReturnValue().Set(UV_EBADF));
uv_os_fd_t fd;
int err = uv_fileno(reinterpret_cast<uv_handle_t*>(&wrap->handle_), &fd);
if (err != 0) {
args.GetReturnValue().Set(err);
return;
}
// Detect socket family explicitly
sockaddr_storage storage;
int addrlen = sizeof(storage);
int sock_err = uv_tcp_getsockname(
&wrap->handle_, reinterpret_cast<sockaddr*>(&storage), &addrlen);
int level;
int option;
// Select the correct constant based on family
if (sock_err == 0) {
if (storage.ss_family == AF_INET) {
level = IPPROTO_IP;
option = IP_TOS;
} else if (storage.ss_family == AF_INET6) {
level = IPPROTO_IPV6;
option = IPV6_TCLASS;
} else {
// Unknown or unsupported family
args.GetReturnValue().Set(UV_EINVAL);
return;
}
} else {
// If we can't determine the family, we can't safely get the TOS
args.GetReturnValue().Set(sock_err);
return;
}
int tos = 0;
// Perform the system call with platform-specific casting
#ifdef _WIN32
int len = sizeof(tos);
if (getsockopt(reinterpret_cast<::SOCKET>(fd),
level,
option,
reinterpret_cast<char*>(&tos),
&len) == 0) {
args.GetReturnValue().Set(tos);
} else {
args.GetReturnValue().Set(uv_translate_sys_error(WSAGetLastError()));
}
#else
socklen_t len = sizeof(tos);
if (getsockopt(fd, level, option, &tos, &len) == 0) {
args.GetReturnValue().Set(tos);
} else {
args.GetReturnValue().Set(uv_translate_sys_error(errno));
}
#endif
}
#ifdef _WIN32
void TCPWrap::SetSimultaneousAccepts(const FunctionCallbackInfo<Value>& args) {
TCPWrap* wrap;
ASSIGN_OR_RETURN_UNWRAP(
&wrap, args.This(), args.GetReturnValue().Set(UV_EBADF));
bool enable = args[0]->IsTrue();
int err = uv_tcp_simultaneous_accepts(&wrap->handle_, enable);
args.GetReturnValue().Set(err);
}
#endif
void TCPWrap::Open(const FunctionCallbackInfo<Value>& args) {
TCPWrap* wrap;
ASSIGN_OR_RETURN_UNWRAP(
&wrap, args.This(), args.GetReturnValue().Set(UV_EBADF));
int64_t val;
if (!args[0]->IntegerValue(args.GetIsolate()->GetCurrentContext()).To(&val))
return;
int fd = static_cast<int>(val);
int err = uv_tcp_open(&wrap->handle_, fd);
if (err == 0) wrap->set_fd(fd);
args.GetReturnValue().Set(err);
}
template <typename T>
void TCPWrap::Bind(
const FunctionCallbackInfo<Value>& args,
int family,
std::function<int(const char* ip_address, int port, T* addr)> uv_ip_addr) {
TCPWrap* wrap;
ASSIGN_OR_RETURN_UNWRAP(
&wrap, args.This(), args.GetReturnValue().Set(UV_EBADF));
Environment* env = wrap->env();
THROW_IF_INSUFFICIENT_PERMISSIONS(env, permission::PermissionScope::kNet, "");
node::Utf8Value ip_address(env->isolate(), args[0]);
int port;
unsigned int flags = 0;
if (!args[1]->Int32Value(env->context()).To(&port)) return;
if (args.Length() >= 3 && args[2]->IsUint32()) {
if (!args[2]->Uint32Value(env->context()).To(&flags)) return;
// Can not set IPV6 flags on IPV4 socket
if (family == AF_INET) {
flags &= ~UV_TCP_IPV6ONLY;
}
}
T addr;
int err = uv_ip_addr(*ip_address, port, &addr);
if (err == 0) {
err = uv_tcp_bind(
&wrap->handle_, reinterpret_cast<const sockaddr*>(&addr), flags);
}
args.GetReturnValue().Set(err);
}
void TCPWrap::Bind(const FunctionCallbackInfo<Value>& args) {
Bind<sockaddr_in>(args, AF_INET, uv_ip4_addr);
}
void TCPWrap::Bind6(const FunctionCallbackInfo<Value>& args) {
Bind<sockaddr_in6>(args, AF_INET6, uv_ip6_addr);
}
void TCPWrap::Listen(const FunctionCallbackInfo<Value>& args) {
TCPWrap* wrap;
ASSIGN_OR_RETURN_UNWRAP(
&wrap, args.This(), args.GetReturnValue().Set(UV_EBADF));
Environment* env = wrap->env();
int backlog;
if (!args[0]->Int32Value(env->context()).To(&backlog)) return;
THROW_IF_INSUFFICIENT_PERMISSIONS(env, permission::PermissionScope::kNet, "");
int err = uv_listen(
reinterpret_cast<uv_stream_t*>(&wrap->handle_), backlog, OnConnection);
args.GetReturnValue().Set(err);
}
void TCPWrap::Connect(const FunctionCallbackInfo<Value>& args) {
CHECK(args[2]->IsUint32());
// explicit cast to fit to libuv's type expectation
int port = static_cast<int>(args[2].As<Uint32>()->Value());
Connect<sockaddr_in>(args, [port](const char* ip_address, sockaddr_in* addr) {
return uv_ip4_addr(ip_address, port, addr);
});
}
void TCPWrap::Connect6(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
CHECK(args[2]->IsUint32());
int port;
if (!args[2]->Int32Value(env->context()).To(&port)) return;
Connect<sockaddr_in6>(args,
[port](const char* ip_address, sockaddr_in6* addr) {
return uv_ip6_addr(ip_address, port, addr);
});
}
template <typename T>
void TCPWrap::Connect(
const FunctionCallbackInfo<Value>& args,
std::function<int(const char* ip_address, T* addr)> uv_ip_addr) {
Environment* env = Environment::GetCurrent(args);
TCPWrap* wrap;
ASSIGN_OR_RETURN_UNWRAP(
&wrap, args.This(), args.GetReturnValue().Set(UV_EBADF));
CHECK(args[0]->IsObject());
CHECK(args[1]->IsString());
Local<Object> req_wrap_obj = args[0].As<Object>();
node::Utf8Value ip_address(env->isolate(), args[1]);
ERR_ACCESS_DENIED_IF_INSUFFICIENT_PERMISSIONS(
env, permission::PermissionScope::kNet, ip_address.ToStringView(), args);
T addr;
int err = uv_ip_addr(*ip_address, &addr);
if (err == 0) {
AsyncHooks::DefaultTriggerAsyncIdScope trigger_scope(wrap);
ConnectWrap* req_wrap =
new ConnectWrap(env, req_wrap_obj, AsyncWrap::PROVIDER_TCPCONNECTWRAP);
err = req_wrap->Dispatch(uv_tcp_connect,
&wrap->handle_,
reinterpret_cast<const sockaddr*>(&addr),
AfterConnect);
if (err) {
delete req_wrap;
} else {
CHECK(args[2]->Uint32Value(env->context()).IsJust());
uint32_t port;
if (!args[2]->Uint32Value(env->context()).To(&port)) {
return;
}
TRACE_EVENT_NESTABLE_ASYNC_BEGIN2(TRACING_CATEGORY_NODE2(net, native),
"connect",
req_wrap,
"ip",
TRACE_STR_COPY(*ip_address),
"port",
port);
}
}
args.GetReturnValue().Set(err);
}
void TCPWrap::Reset(const FunctionCallbackInfo<Value>& args) {
TCPWrap* wrap;
ASSIGN_OR_RETURN_UNWRAP(
&wrap, args.This(), args.GetReturnValue().Set(UV_EBADF));
int err = wrap->Reset(args[0]);
args.GetReturnValue().Set(err);
}
int TCPWrap::Reset(Local<Value> close_callback) {
if (state_ != kInitialized) return 0;
int err = uv_tcp_close_reset(&handle_, OnClose);
state_ = kClosing;
if (!err & !close_callback.IsEmpty() && close_callback->IsFunction() &&
!persistent().IsEmpty()) {
object()
->Set(env()->context(), env()->handle_onclose_symbol(), close_callback)
.Check();
}
return err;
}
// also used by udp_wrap.cc
MaybeLocal<Object> AddressToJS(Environment* env,
const sockaddr* addr,
Local<Object> info) {
EscapableHandleScope scope(env->isolate());
char ip[INET6_ADDRSTRLEN + UV_IF_NAMESIZE];
const sockaddr_in* a4;
const sockaddr_in6* a6;
int port;
if (info.IsEmpty()) {
info = Object::New(env->isolate());
}
switch (addr->sa_family) {
case AF_INET6:
a6 = reinterpret_cast<const sockaddr_in6*>(addr);
uv_inet_ntop(AF_INET6, &a6->sin6_addr, ip, sizeof ip);
// Add an interface identifier to a link local address.
if (IN6_IS_ADDR_LINKLOCAL(&a6->sin6_addr) && a6->sin6_scope_id > 0) {
const size_t addrlen = strlen(ip);
CHECK_LT(addrlen, sizeof(ip));
ip[addrlen] = '%';
size_t scopeidlen = sizeof(ip) - addrlen - 1;
CHECK_GE(scopeidlen, UV_IF_NAMESIZE);
const int r =
uv_if_indextoiid(a6->sin6_scope_id, ip + addrlen + 1, &scopeidlen);
if (r) {
env->ThrowUVException(r, "uv_if_indextoiid");
return {};
}
}
port = ntohs(a6->sin6_port);
if (info->Set(env->context(),
env->address_string(),
OneByteString(env->isolate(), ip))
.IsNothing() ||
info->Set(env->context(), env->family_string(), env->ipv6_string())
.IsNothing() ||
info->Set(env->context(),
env->port_string(),
Integer::New(env->isolate(), port))
.IsNothing()) {
return {};
}
break;
case AF_INET:
a4 = reinterpret_cast<const sockaddr_in*>(addr);
uv_inet_ntop(AF_INET, &a4->sin_addr, ip, sizeof ip);
port = ntohs(a4->sin_port);
if (info->Set(env->context(),
env->address_string(),
OneByteString(env->isolate(), ip))
.IsNothing() ||
info->Set(env->context(), env->family_string(), env->ipv4_string())
.IsNothing() ||
info->Set(env->context(),
env->port_string(),
Integer::New(env->isolate(), port))
.IsNothing()) {
return {};
}
break;
default:
if (info->Set(env->context(),
env->address_string(),
String::Empty(env->isolate()))
.IsNothing()) {
return {};
}
}
return scope.Escape(info);
}
} // namespace node
NODE_BINDING_CONTEXT_AWARE_INTERNAL(tcp_wrap, node::TCPWrap::Initialize)
NODE_BINDING_EXTERNAL_REFERENCE(tcp_wrap,
node::TCPWrap::RegisterExternalReferences)