node/src/udp_wrap.cc at master · CombatCode/node · GitHub

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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 "node.h"

#include "node_buffer.h"

#include "req_wrap.h"

#include "handle_wrap.h"

#include "udp_wrap.h"

#include <stdlib.h>

namespace node {

using v8::Function;

using v8::FunctionCallbackInfo;

using v8::FunctionTemplate;

using v8::Handle;

using v8::HandleScope;

using v8::Integer;

using v8::Local;

using v8::Object;

using v8::Persistent;

using v8::PropertyAttribute;

using v8::PropertyCallbackInfo;

using v8::String;

using v8::Uint32;

using v8::Value;

typedef ReqWrap<uv_udp_send_t> SendWrap;

// see tcp_wrap.cc

Local<Object> AddressToJS(const sockaddr* addr);

static Persistent<Function> constructor;

static Cached<String> buffer_sym;

static Cached<String> oncomplete_sym;

static Cached<String> onmessage_sym;

UDPWrap::UDPWrap(Handle<Object> object)

: HandleWrap(object, reinterpret_cast<uv_handle_t*>(&handle_)) {

int r = uv_udp_init(uv_default_loop(), &handle_);

assert(r == 0); // can't fail anyway

}

UDPWrap::~UDPWrap() {

}

void UDPWrap::Initialize(Handle<Object> target) {

HandleWrap::Initialize(target);

HandleScope scope(node_isolate);

buffer_sym = String::New("buffer");

oncomplete_sym = String::New("oncomplete");

onmessage_sym = String::New("onmessage");

Local<FunctionTemplate> t = FunctionTemplate::New(New);

t->InstanceTemplate()->SetInternalFieldCount(1);

t->SetClassName(String::NewSymbol("UDP"));

enum PropertyAttribute attributes =

static_cast<PropertyAttribute>(v8::ReadOnly | v8::DontDelete);

t->InstanceTemplate()->SetAccessor(String::New("fd"),

UDPWrap::GetFD,

NULL,

Handle<Value>(),

v8::DEFAULT,

attributes);

NODE_SET_PROTOTYPE_METHOD(t, "bind", Bind);

NODE_SET_PROTOTYPE_METHOD(t, "send", Send);

NODE_SET_PROTOTYPE_METHOD(t, "bind6", Bind6);

NODE_SET_PROTOTYPE_METHOD(t, "send6", Send6);

NODE_SET_PROTOTYPE_METHOD(t, "close", Close);

NODE_SET_PROTOTYPE_METHOD(t, "recvStart", RecvStart);

NODE_SET_PROTOTYPE_METHOD(t, "recvStop", RecvStop);

NODE_SET_PROTOTYPE_METHOD(t, "getsockname", GetSockName);

NODE_SET_PROTOTYPE_METHOD(t, "addMembership", AddMembership);

NODE_SET_PROTOTYPE_METHOD(t, "dropMembership", DropMembership);

NODE_SET_PROTOTYPE_METHOD(t, "setMulticastTTL", SetMulticastTTL);

NODE_SET_PROTOTYPE_METHOD(t, "setMulticastLoopback", SetMulticastLoopback);

NODE_SET_PROTOTYPE_METHOD(t, "setBroadcast", SetBroadcast);

NODE_SET_PROTOTYPE_METHOD(t, "setTTL", SetTTL);

NODE_SET_PROTOTYPE_METHOD(t, "ref", HandleWrap::Ref);

NODE_SET_PROTOTYPE_METHOD(t, "unref", HandleWrap::Unref);

constructor.Reset(node_isolate, t->GetFunction());

target->Set(String::NewSymbol("UDP"), t->GetFunction());

}

void UDPWrap::New(const FunctionCallbackInfo<Value>& args) {

HandleScope scope(node_isolate);

assert(args.IsConstructCall());

new UDPWrap(args.This());

}

void UDPWrap::GetFD(Local<String>, const PropertyCallbackInfo<Value>& args) {

#if !defined(_WIN32)

HandleScope scope(node_isolate);

UNWRAP(UDPWrap)

int fd = (wrap == NULL) ? -1 : wrap->handle_.io_watcher.fd;

args.GetReturnValue().Set(fd);

#endif

}

void UDPWrap::DoBind(const FunctionCallbackInfo<Value>& args, int family) {

HandleScope scope(node_isolate);

int r;

UNWRAP(UDPWrap)

// bind(ip, port, flags)

assert(args.Length() == 3);

String::Utf8Value address(args[0]);

const int port = args[1]->Uint32Value();

const int flags = args[2]->Uint32Value();

switch (family) {

case AF_INET:

r = uv_udp_bind(&wrap->handle_, uv_ip4_addr(*address, port), flags);

break;

case AF_INET6:

r = uv_udp_bind6(&wrap->handle_, uv_ip6_addr(*address, port), flags);

break;

default:

assert(0 && "unexpected address family");

abort();

}

if (r) SetErrno(uv_last_error(uv_default_loop()));

args.GetReturnValue().Set(r);

}

void UDPWrap::Bind(const FunctionCallbackInfo<Value>& args) {

DoBind(args, AF_INET);

}

void UDPWrap::Bind6(const FunctionCallbackInfo<Value>& args) {

DoBind(args, AF_INET6);

}

#define X(name, fn) \

void UDPWrap::name(const FunctionCallbackInfo<Value>& args) { \

HandleScope scope(node_isolate); \

UNWRAP(UDPWrap) \

assert(args.Length() == 1); \

int flag = args[0]->Int32Value(); \

int r = fn(&wrap->handle_, flag); \

if (r) SetErrno(uv_last_error(uv_default_loop())); \

args.GetReturnValue().Set(r); \

}

X(SetTTL, uv_udp_set_ttl)

X(SetBroadcast, uv_udp_set_broadcast)

X(SetMulticastTTL, uv_udp_set_multicast_ttl)

X(SetMulticastLoopback, uv_udp_set_multicast_loop)

#undef X

void UDPWrap::SetMembership(const FunctionCallbackInfo<Value>& args,

uv_membership membership) {

HandleScope scope(node_isolate);

UNWRAP(UDPWrap)

assert(args.Length() == 2);

String::Utf8Value address(args[0]);

String::Utf8Value iface(args[1]);

const char* iface_cstr = *iface;

if (args[1]->IsUndefined() || args[1]->IsNull()) {

iface_cstr = NULL;

}

int r = uv_udp_set_membership(&wrap->handle_,

*address,

iface_cstr,

membership);

if (r) SetErrno(uv_last_error(uv_default_loop()));

args.GetReturnValue().Set(r);

}

void UDPWrap::AddMembership(const FunctionCallbackInfo<Value>& args) {

SetMembership(args, UV_JOIN_GROUP);

}

void UDPWrap::DropMembership(const FunctionCallbackInfo<Value>& args) {

SetMembership(args, UV_LEAVE_GROUP);

}

void UDPWrap::DoSend(const FunctionCallbackInfo<Value>& args, int family) {

HandleScope scope(node_isolate);

int r;

// send(buffer, offset, length, port, address)

assert(args.Length() == 5);

UNWRAP(UDPWrap)

assert(Buffer::HasInstance(args[0]));

Local<Object> buffer_obj = args[0]->ToObject();

size_t offset = args[1]->Uint32Value();

size_t length = args[2]->Uint32Value();

assert(offset < Buffer::Length(buffer_obj));

assert(length <= Buffer::Length(buffer_obj) - offset);

SendWrap* req_wrap = new SendWrap();

req_wrap->object()->SetHiddenValue(buffer_sym, buffer_obj);

uv_buf_t buf = uv_buf_init(Buffer::Data(buffer_obj) + offset,

length);

const unsigned short port = args[3]->Uint32Value();

String::Utf8Value address(args[4]);

switch (family) {

case AF_INET:

r = uv_udp_send(&req_wrap->req_, &wrap->handle_, &buf, 1,

uv_ip4_addr(*address, port), OnSend);

break;

case AF_INET6:

r = uv_udp_send6(&req_wrap->req_, &wrap->handle_, &buf, 1,

uv_ip6_addr(*address, port), OnSend);

break;

default:

assert(0 && "unexpected address family");

abort();

}

req_wrap->Dispatched();

if (r) {

SetErrno(uv_last_error(uv_default_loop()));

delete req_wrap;

}

else {

args.GetReturnValue().Set(req_wrap->persistent());

}

void UDPWrap::Send(const FunctionCallbackInfo<Value>& args) {

DoSend(args, AF_INET);

}

void UDPWrap::Send6(const FunctionCallbackInfo<Value>& args) {

DoSend(args, AF_INET6);

}

void UDPWrap::RecvStart(const FunctionCallbackInfo<Value>& args) {

HandleScope scope(node_isolate);

UNWRAP(UDPWrap)

// UV_EALREADY means that the socket is already bound but that's okay

int r = uv_udp_recv_start(&wrap->handle_, OnAlloc, OnRecv);

bool ok = r == 0 || uv_last_error(uv_default_loop()).code == UV_EALREADY;

if (ok == false) SetErrno(uv_last_error(uv_default_loop()));

args.GetReturnValue().Set(ok);

}

void UDPWrap::RecvStop(const FunctionCallbackInfo<Value>& args) {

HandleScope scope(node_isolate);

UNWRAP(UDPWrap)

int r = uv_udp_recv_stop(&wrap->handle_);

args.GetReturnValue().Set(r);

}

void UDPWrap::GetSockName(const FunctionCallbackInfo<Value>& args) {

HandleScope scope(node_isolate);

struct sockaddr_storage address;

UNWRAP(UDPWrap)

int addrlen = sizeof(address);

int r = uv_udp_getsockname(&wrap->handle_,

reinterpret_cast<sockaddr*>(&address),

&addrlen);

if (r) return SetErrno(uv_last_error(uv_default_loop()));

const sockaddr* addr = reinterpret_cast<const sockaddr*>(&address);

args.GetReturnValue().Set(AddressToJS(addr));

}

// TODO share with StreamWrap::AfterWrite() in stream_wrap.cc

void UDPWrap::OnSend(uv_udp_send_t* req, int status) {

HandleScope scope(node_isolate);

assert(req != NULL);

SendWrap* req_wrap = reinterpret_cast<SendWrap*>(req->data);

UDPWrap* wrap = reinterpret_cast<UDPWrap*>(req->handle->data);

assert(req_wrap->persistent().IsEmpty() == false);

assert(wrap->persistent().IsEmpty() == false);

if (status) {

SetErrno(uv_last_error(uv_default_loop()));

}

Local<Object> req_wrap_obj = req_wrap->object();

Local<Value> argv[4] = {

Integer::New(status, node_isolate),

wrap->object(),

req_wrap_obj,

req_wrap_obj->GetHiddenValue(buffer_sym),

};

MakeCallback(req_wrap_obj, oncomplete_sym, ARRAY_SIZE(argv), argv);

delete req_wrap;

}

uv_buf_t UDPWrap::OnAlloc(uv_handle_t* handle, size_t suggested_size) {

char* data = static_cast<char*>(malloc(suggested_size));

if (data == NULL && suggested_size > 0) {

FatalError("node::UDPWrap::OnAlloc(uv_handle_t*, size_t)",

"Out Of Memory");

}

return uv_buf_init(data, suggested_size);

}

void UDPWrap::OnRecv(uv_udp_t* handle,

ssize_t nread,

uv_buf_t buf,

struct sockaddr* addr,

unsigned flags) {

HandleScope scope(node_isolate);

UDPWrap* wrap = reinterpret_cast<UDPWrap*>(handle->data);

if (nread < 0) {

if (buf.base != NULL)

free(buf.base);

Local<Object> wrap_obj = wrap->object();

Local<Value> argv[] = { wrap_obj };

SetErrno(uv_last_error(uv_default_loop()));

MakeCallback(wrap_obj, onmessage_sym, ARRAY_SIZE(argv), argv);

return;

}

if (nread == 0) {

if (buf.base != NULL)

free(buf.base);

return;

}

buf.base = static_cast<char*>(realloc(buf.base, nread));

Local<Object> wrap_obj = wrap->object();

Local<Value> argv[] = {

wrap_obj,

Buffer::Use(buf.base, nread),

AddressToJS(addr)

};

MakeCallback(wrap_obj, onmessage_sym, ARRAY_SIZE(argv), argv);

}

UDPWrap* UDPWrap::Unwrap(Local<Object> obj) {

assert(!obj.IsEmpty());

assert(obj->InternalFieldCount() > 0);

return static_cast<UDPWrap*>(obj->GetAlignedPointerFromInternalField(0));

}

Local<Object> UDPWrap::Instantiate() {

// If this assert fires then Initialize hasn't been called yet.

assert(constructor.IsEmpty() == false);

return NewInstance(constructor);

}

uv_udp_t* UDPWrap::UVHandle() {

return &handle_;

}

} // namespace node

NODE_MODULE(node_udp_wrap, node::UDPWrap::Initialize)

node/src/udp_wrap.cc at master · CombatCode/node · GitHub

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