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binding.cc
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/*
* Copyright (c) 2011 Justin Tulloss
* Copyright (c) 2010 Justin Tulloss
*
* 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 <v8.h>
#include <node.h>
#include <node_version.h>
#include <node_buffer.h>
#include <zmq.h>
#if (ZMQ_VERSION < 40200)
#include <zmq_utils.h>
#endif
#include <assert.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <stdexcept>
#include <set>
#include "nan.h"
#ifdef _WIN32
# define snprintf _snprintf_s
#endif
#define ZMQ_CAN_DISCONNECT (ZMQ_VERSION_MAJOR == 3 && ZMQ_VERSION_MINOR >= 2) || ZMQ_VERSION_MAJOR > 3
#define ZMQ_CAN_UNBIND (ZMQ_VERSION_MAJOR == 3 && ZMQ_VERSION_MINOR >= 2) || ZMQ_VERSION_MAJOR > 3
#define ZMQ_CAN_MONITOR (ZMQ_VERSION > 30201)
#define ZMQ_CAN_SET_CTX (ZMQ_VERSION_MAJOR == 3 && ZMQ_VERSION_MINOR >= 2) || ZMQ_VERSION_MAJOR > 3
#define ZERO_COPY_MESSAGE_SEND 1
using namespace v8;
using namespace node;
enum {
STATE_READY
, STATE_BUSY
, STATE_CLOSED
};
namespace zmq {
std::set<int> opts_int;
std::set<int> opts_uint32;
std::set<int> opts_int64;
std::set<int> opts_uint64;
std::set<int> opts_binary;
class Socket;
class Context : public Nan::ObjectWrap {
friend class Socket;
public:
static NAN_MODULE_INIT(Initialize);
virtual ~Context();
private:
Context(int io_threads);
static NAN_METHOD(New);
static Context *GetContext(const Nan::FunctionCallbackInfo<Value>&);
void Close();
static NAN_METHOD(Close);
#if ZMQ_CAN_SET_CTX
static NAN_METHOD(GetOpt);
static NAN_METHOD(SetOpt);
#endif
void* context_;
};
class Socket : public Nan::ObjectWrap {
public:
static NAN_MODULE_INIT(Initialize);
virtual ~Socket();
void NotifyReadReady();
void NotifySendReady();
void CallbackIfReady();
#if ZMQ_CAN_MONITOR
void MonitorEvent(uint16_t event_id, int32_t event_value, char *endpoint);
void MonitorError(const char *error_msg);
#endif
private:
static NAN_METHOD(New);
Socket(Context *context, int type);
static Socket* GetSocket(const Nan::FunctionCallbackInfo<Value>&);
static NAN_GETTER(GetState);
static NAN_GETTER(GetPending);
static NAN_SETTER(SetPending);
template<typename T>
Local<Value> GetSockOpt(int option);
template<typename T>
Local<Value> SetSockOpt(int option, Local<Value> wrappedValue);
static NAN_METHOD(GetSockOpt);
static NAN_METHOD(SetSockOpt);
void _AttachToEventLoop();
void _DetachFromEventLoop();
static NAN_METHOD(AttachToEventLoop);
static NAN_METHOD(DetachFromEventLoop);
struct BindState;
static NAN_METHOD(Bind);
static void UV_BindAsync(uv_work_t* req);
static void UV_BindAsyncAfter(uv_work_t* req);
static NAN_METHOD(BindSync);
#if ZMQ_CAN_UNBIND
static NAN_METHOD(Unbind);
static void UV_UnbindAsync(uv_work_t* req);
static void UV_UnbindAsyncAfter(uv_work_t* req);
static NAN_METHOD(UnbindSync);
#endif
static NAN_METHOD(Connect);
#if ZMQ_CAN_DISCONNECT
static NAN_METHOD(Disconnect);
#endif
class IncomingMessage;
class OutgoingMessage;
static NAN_METHOD(Recv);
static NAN_METHOD(Readv);
static NAN_METHOD(Sendv);
void Close();
static NAN_METHOD(Close);
Nan::Persistent<Object> context_;
void *socket_;
bool pending_;
uint8_t state_;
int32_t endpoints;
#if ZMQ_CAN_MONITOR
void *monitor_socket_;
uv_timer_t *monitor_handle_;
int64_t timer_interval_;
int64_t num_of_events_;
static void UV_MonitorCallback(uv_timer_t* handle, int status);
static NAN_METHOD(Monitor);
void Unmonitor();
static NAN_METHOD(Unmonitor);
#endif
short PollForEvents();
uv_poll_t *poll_handle_;
static void UV_PollCallback(uv_poll_t* handle, int status, int events);
};
Nan::Persistent<String> send_callback_symbol;
Nan::Persistent<String> read_callback_symbol;
#if ZMQ_CAN_MONITOR
Nan::Persistent<String> monitor_symbol;
Nan::Persistent<String> monitor_error;
int monitors_count = 0;
#endif
static NAN_MODULE_INIT(Initialize);
static void
on_uv_close(uv_handle_t *handle)
{
delete handle;
}
/*
* Helpers for dealing with ØMQ errors.
*/
static inline const char*
ErrorMessage() {
return zmq_strerror(zmq_errno());
}
static inline Local<Value>
ExceptionFromError() {
return Nan::Error(ErrorMessage());
}
/*
* Context methods.
*/
NAN_MODULE_INIT(Context::Initialize) {
Nan::HandleScope scope;
Local<FunctionTemplate> t = Nan::New<FunctionTemplate>(New);
t->InstanceTemplate()->SetInternalFieldCount(1);
Nan::SetPrototypeMethod(t, "close", Close);
#if ZMQ_CAN_SET_CTX
Nan::SetPrototypeMethod(t, "setOpt", SetOpt);
Nan::SetPrototypeMethod(t, "getOpt", GetOpt);
#endif
Nan::Set(target, Nan::New("Context").ToLocalChecked(), Nan::GetFunction(t).ToLocalChecked());
}
Context::~Context() {
Close();
}
NAN_METHOD(Context::New) {
assert(info.IsConstructCall());
int io_threads = 1;
if (info.Length() == 1) {
if (!info[0]->IsNumber()) {
return Nan::ThrowTypeError("io_threads must be an integer");
}
io_threads = Nan::To<int>(info[0]).FromJust();
if (io_threads < 1) {
return Nan::ThrowRangeError("io_threads must be a positive number");
}
}
Context *context = new Context(io_threads);
context->Wrap(info.This());
info.GetReturnValue().Set(info.This());
}
Context::Context(int io_threads) : Nan::ObjectWrap() {
context_ = zmq_init(io_threads);
if (!context_) Nan::ThrowError(ErrorMessage());
}
Context *
Context::GetContext(const Nan::FunctionCallbackInfo<Value>& info) {
return Nan::ObjectWrap::Unwrap<Context>(info.This());
}
void
Context::Close() {
if (context_ != NULL) {
if (zmq_term(context_) < 0) {
Nan::ThrowError(ErrorMessage());
return;
}
context_ = NULL;
}
}
NAN_METHOD(Context::Close) {
GetContext(info)->Close();
return;
}
#if ZMQ_CAN_SET_CTX
NAN_METHOD(Context::SetOpt) {
if (info.Length() != 2)
return Nan::ThrowError("Must pass an option and a value");
if (!info[0]->IsNumber() || !info[1]->IsNumber())
return Nan::ThrowTypeError("Arguments must be numbers");
int option = Nan::To<int32_t>(info[0]).FromJust();
int value = Nan::To<int32_t>(info[1]).FromJust();
Context *context = GetContext(info);
if (zmq_ctx_set(context->context_, option, value) < 0)
return Nan::ThrowError(ExceptionFromError());
return;
}
NAN_METHOD(Context::GetOpt) {
if (info.Length() != 1)
return Nan::ThrowError("Must pass an option");
if (!info[0]->IsNumber())
return Nan::ThrowTypeError("Option must be an integer");
int option = Nan::To<int32_t>(info[0]).FromJust();
Context *context = GetContext(info);
int value = zmq_ctx_get(context->context_, option);
info.GetReturnValue().Set(Nan::New<Integer>(value));
}
#endif
/*
* Socket methods.
*/
NAN_MODULE_INIT(Socket::Initialize) {
Nan::HandleScope scope;
Local<FunctionTemplate> t = Nan::New<FunctionTemplate>(New);
t->InstanceTemplate()->SetInternalFieldCount(1);
Nan::SetAccessor(t->InstanceTemplate(),
Nan::New("state").ToLocalChecked(), Socket::GetState);
Nan::SetAccessor(t->InstanceTemplate(),
Nan::New("pending").ToLocalChecked(), GetPending, SetPending);
Nan::SetPrototypeMethod(t, "bind", Bind);
Nan::SetPrototypeMethod(t, "bindSync", BindSync);
#if ZMQ_CAN_UNBIND
Nan::SetPrototypeMethod(t, "unbind", Unbind);
Nan::SetPrototypeMethod(t, "unbindSync", UnbindSync);
#endif
Nan::SetPrototypeMethod(t, "connect", Connect);
Nan::SetPrototypeMethod(t, "getsockopt", GetSockOpt);
Nan::SetPrototypeMethod(t, "setsockopt", SetSockOpt);
Nan::SetPrototypeMethod(t, "ref", AttachToEventLoop);
Nan::SetPrototypeMethod(t, "unref", DetachFromEventLoop);
Nan::SetPrototypeMethod(t, "recv", Recv);
Nan::SetPrototypeMethod(t, "readv", Readv);
Nan::SetPrototypeMethod(t, "sendv", Sendv);
Nan::SetPrototypeMethod(t, "close", Close);
#if ZMQ_CAN_DISCONNECT
Nan::SetPrototypeMethod(t, "disconnect", Disconnect);
#endif
#if ZMQ_CAN_MONITOR
Nan::SetPrototypeMethod(t, "monitor", Monitor);
Nan::SetPrototypeMethod(t, "unmonitor", Unmonitor);
monitor_symbol.Reset(Nan::New("onMonitorEvent").ToLocalChecked());
monitor_error.Reset(Nan::New("onMonitorError").ToLocalChecked());
#endif
Nan::Set(target, Nan::New("SocketBinding").ToLocalChecked(), Nan::GetFunction(t).ToLocalChecked());
read_callback_symbol.Reset(Nan::New("onReadReady").ToLocalChecked());
send_callback_symbol.Reset(Nan::New("onSendReady").ToLocalChecked());
}
Socket::~Socket() {
Unmonitor();
Close();
}
NAN_METHOD(Socket::New) {
assert(info.IsConstructCall());
if (info.Length() != 2) {
return Nan::ThrowError("Must pass a context and a type to constructor");
}
Context *context = Nan::ObjectWrap::Unwrap<Context>(info[0].As<Object>());
if (!info[1]->IsNumber()) {
return Nan::ThrowTypeError("Type must be an integer");
}
int type = Nan::To<int>(info[1]).FromJust();
Socket *socket = new Socket(context, type);
socket->Wrap(info.This());
info.GetReturnValue().Set(info.This());
}
short
Socket::PollForEvents() {
zmq_pollitem_t item = { socket_, 0, ZMQ_POLLIN, 0 };
if (pending_)
item.events |= ZMQ_POLLOUT;
while (true) {
int rc = zmq_poll(&item, 1, 0);
if (rc < 0) {
if (zmq_errno()==EINTR) {
continue;
} else {
Nan::ThrowError(ErrorMessage());
return -1;
}
} else {
break;
}
}
return item.revents & item.events;
}
void
Socket::NotifyReadReady() {
Nan::HandleScope scope;
Local<Value> callback_v = Nan::Get(this->handle(), Nan::New(read_callback_symbol)).ToLocalChecked();
Nan::MakeCallback(this->handle(), callback_v.As<Function>(), 0, NULL);
}
void
Socket::NotifySendReady() {
Nan::HandleScope scope;
Local<Value> callback_v = Nan::Get(this->handle(), Nan::New(send_callback_symbol)).ToLocalChecked();
Nan::MakeCallback(this->handle(), callback_v.As<Function>(), 0, NULL);
}
void
Socket::CallbackIfReady() {
short events = PollForEvents();
if ((events & ZMQ_POLLIN) != 0) {
NotifyReadReady();
}
if ((events & ZMQ_POLLOUT) != 0) {
NotifySendReady();
}
}
void
Socket::UV_PollCallback(uv_poll_t* handle, int status, int events) {
if (status != 0) {
Nan::ThrowError("I/O status: socket not ready !=0 ");
return;
}
Socket* s = static_cast<Socket*>(handle->data);
s->CallbackIfReady();
}
#if ZMQ_CAN_MONITOR
void
Socket::MonitorEvent(uint16_t event_id, int32_t event_value, char *event_endpoint) {
Nan::HandleScope scope;
Local<Value> callback_v = Nan::Get(this->handle(), Nan::New(monitor_symbol)).ToLocalChecked();
if (!callback_v->IsFunction()) {
return;
}
Local<Value> argv[4];
argv[0] = Nan::New<Integer>(event_id);
argv[1] = Nan::New<Integer>(event_value);
argv[2] = Nan::New<String>(event_endpoint).ToLocalChecked();
switch (event_id) {
case ZMQ_EVENT_BIND_FAILED:
case ZMQ_EVENT_ACCEPT_FAILED:
case ZMQ_EVENT_CLOSE_FAILED:
argv[3] = ExceptionFromError();
break;
default:
argv[3] = Nan::Undefined();
break;
}
Nan::MakeCallback(this->handle(), callback_v.As<Function>(), 4, argv);
}
void
Socket::MonitorError(const char *error_msg) {
Nan::HandleScope scope;
Local<Value> callback_v = Nan::Get(this->handle(), Nan::New(monitor_error)).ToLocalChecked();
if (!callback_v->IsFunction()) {
return;
}
Local<Value> argv[1];
argv[0] = Nan::New<String>(error_msg).ToLocalChecked();
Nan::MakeCallback(this->handle(), callback_v.As<Function>(), 1, argv);
}
void
Socket::UV_MonitorCallback(uv_timer_t* handle, int status) {
Nan::HandleScope scope;
Socket* s = static_cast<Socket*>(handle->data);
zmq_msg_t msg1; /* 3.x has 1 message per event */
if (s->state_ == STATE_CLOSED)
return;
zmq_pollitem_t item;
item.socket = s->monitor_socket_;
item.events = ZMQ_POLLIN;
const char* error = NULL;
int64_t ittr = 0;
while ((s->num_of_events_ == 0 || s->num_of_events_ > ittr++) && zmq_poll(&item, 1, 0)) {
zmq_msg_init (&msg1);
if (zmq_recvmsg (s->monitor_socket_, &msg1, ZMQ_DONTWAIT) > 0) {
char event_endpoint[1025];
uint16_t event_id;
int32_t event_value;
#if ZMQ_VERSION_MAJOR >= 4
uint8_t *data = static_cast<uint8_t *>(zmq_msg_data(&msg1));
event_id = *reinterpret_cast<uint16_t *>(data);
event_value = *reinterpret_cast<uint32_t *>(data + 2);
zmq_msg_t msg2; /* 4.x has 2 messages per event */
// get our next frame it may have the target address and safely copy to our buffer
zmq_msg_init (&msg2);
if (zmq_msg_more(&msg1) == 0 || zmq_recvmsg (s->monitor_socket_, &msg2, 0) == -1) {
error = ErrorMessage();
zmq_msg_close(&msg2);
break;
}
// protect from overflow
size_t len = zmq_msg_size(&msg2);
// MIN message size and buffer size with null padding
len = len < sizeof(event_endpoint)-1 ? len : sizeof(event_endpoint)-1;
memcpy(event_endpoint, zmq_msg_data(&msg2), len);
zmq_msg_close(&msg2);
// null terminate our string
event_endpoint[len]=0;
#else
// monitoring on zmq < 4 used zmq_event_t
zmq_event_t event;
memcpy (&event, zmq_msg_data (&msg1), sizeof (zmq_event_t));
event_id = event.event;
// Bit of a hack, but all events in the zmq_event_t union have the same layout so this will work for all event types.
event_value = event.data.connected.fd;
snprintf(event_endpoint, sizeof(event_endpoint), "%s", event.data.connected.addr);
#endif
s->MonitorEvent(event_id, event_value, event_endpoint);
zmq_msg_close(&msg1);
}
else {
error = ErrorMessage();
zmq_msg_close(&msg1);
break;
}
}
// If there was no error and we still monitor we reset the monitor timer
if (error == NULL && s->monitor_handle_ != NULL) {
uv_timer_start(s->monitor_handle_, reinterpret_cast<uv_timer_cb>(Socket::UV_MonitorCallback), s->timer_interval_, 0);
}
// If error raise the monitor error event and stop the monitor
else if (error != NULL) {
s->Unmonitor();
s->MonitorError(error);
}
}
#endif
Socket::Socket(Context *context, int type) : Nan::ObjectWrap() {
context_.Reset(context->handle());
socket_ = zmq_socket(context->context_, type);
pending_ = false;
state_ = STATE_READY;
if (NULL == socket_) {
Nan::ThrowError(ErrorMessage());
return;
}
endpoints = 0;
poll_handle_ = new uv_poll_t;
poll_handle_->data = this;
uv_os_sock_t socket;
size_t len = sizeof(uv_os_sock_t);
if (zmq_getsockopt(socket_, ZMQ_FD, &socket, &len)) {
Nan::ThrowError(ErrorMessage());
return;
}
#if ZMQ_CAN_MONITOR
this->monitor_socket_ = NULL;
#endif
uv_poll_init_socket(uv_default_loop(), poll_handle_, socket);
uv_poll_start(poll_handle_, UV_READABLE, Socket::UV_PollCallback);
}
Socket *
Socket::GetSocket(const Nan::FunctionCallbackInfo<Value> &info) {
return Nan::ObjectWrap::Unwrap<Socket>(info.This());
}
/*
* This macro makes a call to GetSocket and checks the socket state. These two
* things go hand in hand everywhere in our code.
*/
#define GET_SOCKET(info) \
Socket* socket = GetSocket(info); \
if (socket->state_ == STATE_CLOSED) \
return Nan::ThrowTypeError("Socket is closed"); \
if (socket->state_ == STATE_BUSY) \
return Nan::ThrowTypeError("Socket is busy");
NAN_GETTER(Socket::GetState) {
Socket* socket = Nan::ObjectWrap::Unwrap<Socket>(info.Holder());
info.GetReturnValue().Set(Nan::New<Integer>(socket->state_));
}
NAN_GETTER(Socket::GetPending) {
Socket* socket = Nan::ObjectWrap::Unwrap<Socket>(info.Holder());
info.GetReturnValue().Set(socket->pending_);
}
NAN_SETTER(Socket::SetPending) {
if (!value->IsBoolean())
return Nan::ThrowTypeError("Pending must be a boolean");
Socket* socket = Nan::ObjectWrap::Unwrap<Socket>(info.Holder());
socket->pending_ = Nan::To<bool>(value).FromJust();
}
template<typename T>
Local<Value> Socket::GetSockOpt(int option) {
T value = 0;
size_t len = sizeof(T);
while (true) {
int rc = zmq_getsockopt(socket_, option, &value, &len);
if (rc < 0) {
if(zmq_errno()==EINTR) {
continue;
}
Nan::ThrowError(ExceptionFromError());
return Nan::Undefined();
}
break;
}
return Nan::New<Number>(value);
}
template<typename T>
Local<Value> Socket::SetSockOpt(int option, Local<Value> wrappedValue) {
if (!wrappedValue->IsNumber()) {
Nan::ThrowError("Value must be an integer");
return Nan::Undefined();
}
T value = Nan::To<T>(wrappedValue).FromJust();
if (zmq_setsockopt(socket_, option, &value, sizeof(T)) < 0)
Nan::ThrowError(ExceptionFromError());
return Nan::Undefined();
}
template<> Local<Value>
Socket::GetSockOpt<char*>(int option) {
char value[1024];
size_t len = sizeof(value) - 1;
if (zmq_getsockopt(socket_, option, value, &len) < 0) {
Nan::ThrowError(ExceptionFromError());
return Nan::Undefined();
}
value[len] = '\0';
return Nan::New<String>(value).ToLocalChecked();
}
template<> Local<Value>
Socket::SetSockOpt<char*>(int option, Local<Value> wrappedValue) {
if (!Buffer::HasInstance(wrappedValue)) {
Nan::ThrowTypeError("Value must be a buffer");
return Nan::Undefined();
}
Local<Object> buf = wrappedValue.As<Object>();
size_t length = Buffer::Length(buf);
if (zmq_setsockopt(socket_, option, Buffer::Data(buf), length) < 0)
Nan::ThrowError(ExceptionFromError());
return Nan::Undefined();
}
NAN_METHOD(Socket::GetSockOpt) {
if (info.Length() != 1)
return Nan::ThrowError("Must pass an option");
if (!info[0]->IsNumber())
return Nan::ThrowTypeError("Option must be an integer");
int option = Nan::To<int>(info[0]).FromJust();
GET_SOCKET(info);
if (opts_int.count(option)) {
info.GetReturnValue().Set(socket->GetSockOpt<int>(option));
} else if (opts_uint32.count(option)) {
info.GetReturnValue().Set(socket->GetSockOpt<uint32_t>(option));
} else if (opts_int64.count(option)) {
info.GetReturnValue().Set(socket->GetSockOpt<int64_t>(option));
} else if (opts_uint64.count(option)) {
info.GetReturnValue().Set(socket->GetSockOpt<uint64_t>(option));
} else if (opts_binary.count(option)) {
info.GetReturnValue().Set(socket->GetSockOpt<char*>(option));
} else {
return Nan::ThrowError(zmq_strerror(EINVAL));
}
}
NAN_METHOD(Socket::SetSockOpt) {
if (info.Length() != 2)
return Nan::ThrowError("Must pass an option and a value");
if (!info[0]->IsNumber())
return Nan::ThrowTypeError("Option must be an integer");
int option = Nan::To<int>(info[0]).FromJust();
GET_SOCKET(info);
if (opts_int.count(option)) {
info.GetReturnValue().Set(socket->SetSockOpt<int>(option, info[1]));
} else if (opts_uint32.count(option)) {
info.GetReturnValue().Set(socket->SetSockOpt<uint32_t>(option, info[1]));
} else if (opts_int64.count(option)) {
info.GetReturnValue().Set(socket->SetSockOpt<int64_t>(option, info[1]));
} else if (opts_uint64.count(option)) {
info.GetReturnValue().Set(socket->SetSockOpt<int64_t>(option, info[1]));
} else if (opts_binary.count(option)) {
info.GetReturnValue().Set(socket->SetSockOpt<char*>(option, info[1]));
} else {
return Nan::ThrowError(zmq_strerror(EINVAL));
}
}
void Socket::_AttachToEventLoop() {
uv_ref(reinterpret_cast<uv_handle_t *>(this->poll_handle_));
}
NAN_METHOD(Socket::AttachToEventLoop) {
GET_SOCKET(info);
socket->_AttachToEventLoop();
}
void Socket::_DetachFromEventLoop() {
uv_unref(reinterpret_cast<uv_handle_t *>(this->poll_handle_));
}
NAN_METHOD(Socket::DetachFromEventLoop) {
GET_SOCKET(info);
socket->_DetachFromEventLoop();
}
struct Socket::BindState {
BindState(Socket* sock_, Local<Function> cb_, Local<String> addr_)
: addr(addr_) {
sock_obj.Reset(sock_->handle());
sock = sock_->socket_;
cb.Reset(cb_);
error = 0;
}
~BindState() {
sock_obj.Reset();
cb.Reset();
}
Nan::Persistent<Object> sock_obj;
void* sock;
Nan::Persistent<Function> cb;
Nan::Utf8String addr;
int error;
};
NAN_METHOD(Socket::Bind) {
if (!info[0]->IsString())
return Nan::ThrowTypeError("Address must be a string!");
Local<String> addr = info[0].As<String>();
if (info.Length() > 1 && !info[1]->IsFunction())
return Nan::ThrowTypeError("Provided callback must be a function");
Local<Function> cb = Local<Function>::Cast(info[1]);
GET_SOCKET(info);
BindState* state = new BindState(socket, cb, addr);
uv_work_t* req = new uv_work_t;
req->data = state;
uv_queue_work(uv_default_loop(),
req,
UV_BindAsync,
(uv_after_work_cb)UV_BindAsyncAfter);
socket->state_ = STATE_BUSY;
return;
}
void Socket::UV_BindAsync(uv_work_t* req) {
BindState* state = static_cast<BindState*>(req->data);
if (zmq_bind(state->sock, *state->addr) < 0)
state->error = zmq_errno();
}
void Socket::UV_BindAsyncAfter(uv_work_t* req) {
BindState* state = static_cast<BindState*>(req->data);
Nan::HandleScope scope;
Local<Value> argv[1];
if (state->error) {
argv[0] = Nan::Error(zmq_strerror(state->error));
} else {
argv[0] = Nan::Undefined();
}
Local<Function> cb = Nan::New(state->cb);
Socket *socket = Nan::ObjectWrap::Unwrap<Socket>(Nan::New(state->sock_obj));
socket->state_ = STATE_READY;
if (socket->endpoints == 0) {
socket->Ref();
socket->_AttachToEventLoop();
}
socket->endpoints += 1;
Nan::MakeCallback(Nan::GetCurrentContext()->Global(), cb, 1, argv);
delete state;
delete req;
}
NAN_METHOD(Socket::BindSync) {
if (!info[0]->IsString())
return Nan::ThrowTypeError("Address must be a string!");
Nan::Utf8String addr(info[0].As<String>());
GET_SOCKET(info);
socket->state_ = STATE_BUSY;
if (zmq_bind(socket->socket_, *addr) < 0) {
socket->state_ = STATE_READY;
return Nan::ThrowError(ErrorMessage());
}
socket->state_ = STATE_READY;
if (socket->endpoints == 0) {
socket->Ref();
socket->_AttachToEventLoop();
}
socket->endpoints += 1;
return;
}
#if ZMQ_CAN_UNBIND
NAN_METHOD(Socket::Unbind) {
if (!info[0]->IsString())
return Nan::ThrowTypeError("Address must be a string!");
Local<String> addr = info[0].As<String>();
if (info.Length() > 1 && !info[1]->IsFunction())
return Nan::ThrowTypeError("Provided callback must be a function");
Local<Function> cb = Local<Function>::Cast(info[1]);
GET_SOCKET(info);
BindState* state = new BindState(socket, cb, addr);
uv_work_t* req = new uv_work_t;
req->data = state;
uv_queue_work(uv_default_loop(),
req,
UV_UnbindAsync,
(uv_after_work_cb)UV_UnbindAsyncAfter);
socket->state_ = STATE_BUSY;
return;
}
void Socket::UV_UnbindAsync(uv_work_t* req) {
BindState* state = static_cast<BindState*>(req->data);
if (zmq_unbind(state->sock, *state->addr) < 0)
state->error = zmq_errno();
}
void Socket::UV_UnbindAsyncAfter(uv_work_t* req) {
BindState* state = static_cast<BindState*>(req->data);
Nan::HandleScope scope;
Local<Value> argv[1];
if (state->error) {
argv[0] = Nan::Error(zmq_strerror(state->error));
} else {
argv[0] = Nan::Undefined();
}
Local<Function> cb = Nan::New(state->cb);
Socket *socket = Nan::ObjectWrap::Unwrap<Socket>(Nan::New(state->sock_obj));
socket->state_ = STATE_READY;
if (--socket->endpoints == 0) {
socket->Unref();
socket->_DetachFromEventLoop();
}
Nan::MakeCallback(Nan::GetCurrentContext()->Global(), cb, 1, argv);
delete state;
delete req;
}
NAN_METHOD(Socket::UnbindSync) {
if (!info[0]->IsString())
return Nan::ThrowTypeError("Address must be a string!");
Nan::Utf8String addr(info[0].As<String>());
GET_SOCKET(info);
socket->state_ = STATE_BUSY;
if (zmq_unbind(socket->socket_, *addr) < 0) {
socket->state_ = STATE_READY;
return Nan::ThrowError(ErrorMessage());
}
socket->state_ = STATE_READY;
if (--socket->endpoints == 0) {
socket->Unref();
socket->_DetachFromEventLoop();
}
return;
}
#endif
NAN_METHOD(Socket::Connect) {
if (!info[0]->IsString()) {
return Nan::ThrowTypeError("Address must be a string!");
}
GET_SOCKET(info);
Nan::Utf8String address(info[0].As<String>());
if (zmq_connect(socket->socket_, *address))
return Nan::ThrowError(ErrorMessage());
if (socket->endpoints++ == 0) {
socket->Ref();
socket->_AttachToEventLoop();
}
return;
}
#if ZMQ_CAN_DISCONNECT
NAN_METHOD(Socket::Disconnect) {
if (!info[0]->IsString()) {
return Nan::ThrowTypeError("Address must be a string!");
}
GET_SOCKET(info);
Nan::Utf8String address(info[0].As<String>());
if (zmq_disconnect(socket->socket_, *address))
return Nan::ThrowError(ErrorMessage());
if (--socket->endpoints == 0) {
socket->Unref();
socket->_DetachFromEventLoop();
}
return;
}
#endif
/*
* An object that creates an empty ØMQ message, which can be used for
* zmq_recv. After the receive call, a Buffer object wrapping the ØMQ
* message can be requested. The reference for the ØMQ message will
* remain while the data is in use by the Buffer.
*/
class Socket::IncomingMessage {
public:
inline IncomingMessage() {
msgref_ = new MessageReference();
};
inline ~IncomingMessage() {
if (buf_.IsEmpty() && msgref_) {
delete msgref_;
msgref_ = NULL;
} else {
buf_.Reset();
}
};
inline operator zmq_msg_t*() {
return *msgref_;
}
inline Local<Value> GetBuffer() {
if (buf_.IsEmpty()) {
Local<Object> buf_obj = Nan::NewBuffer((char*)zmq_msg_data(*msgref_), zmq_msg_size(*msgref_), FreeCallback, msgref_).ToLocalChecked();
if (buf_obj.IsEmpty()) {
return Local<Value>();
}
buf_.Reset(buf_obj);
}
return Nan::New(buf_);
}
private:
static void FreeCallback(char* data, void* message) {
delete static_cast<MessageReference*>(message);