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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 "udp_wrap.h"
#include "env.h"
#include "env-inl.h"
#include "node_buffer.h"
#include "handle_wrap.h"
#include "req_wrap.h"
#include "util.h"
#include "util-inl.h"
#include <stdlib.h>
namespace node {
using v8::Context;
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::PropertyAttribute;
using v8::PropertyCallbackInfo;
using v8::String;
using v8::Uint32;
using v8::Undefined;
using v8::Value;
class SendWrap : public ReqWrap<uv_udp_send_t> {
public:
SendWrap(Environment* env, Local<Object> req_wrap_obj, bool have_callback);
inline bool have_callback() const;
private:
const bool have_callback_;
};
SendWrap::SendWrap(Environment* env,
Local<Object> req_wrap_obj,
bool have_callback)
: ReqWrap<uv_udp_send_t>(env, req_wrap_obj),
have_callback_(have_callback) {
}
inline bool SendWrap::have_callback() const {
return have_callback_;
}
UDPWrap::UDPWrap(Environment* env, Handle<Object> object)
: HandleWrap(env, object, reinterpret_cast<uv_handle_t*>(&handle_)) {
int r = uv_udp_init(env->event_loop(), &handle_);
assert(r == 0); // can't fail anyway
}
UDPWrap::~UDPWrap() {
}
void UDPWrap::Initialize(Handle<Object> target,
Handle<Value> unused,
Handle<Context> context) {
Environment* env = Environment::GetCurrent(context);
Local<FunctionTemplate> t = FunctionTemplate::New(New);
t->InstanceTemplate()->SetInternalFieldCount(1);
t->SetClassName(FIXED_ONE_BYTE_STRING(node_isolate, "UDP"));
enum PropertyAttribute attributes =
static_cast<PropertyAttribute>(v8::ReadOnly | v8::DontDelete);
t->InstanceTemplate()->SetAccessor(FIXED_ONE_BYTE_STRING(node_isolate, "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);
AsyncWrap::AddMethods<UDPWrap>(t);
target->Set(FIXED_ONE_BYTE_STRING(node_isolate, "UDP"), t->GetFunction());
env->set_udp_constructor_function(t->GetFunction());
}
void UDPWrap::New(const FunctionCallbackInfo<Value>& args) {
assert(args.IsConstructCall());
HandleScope handle_scope(args.GetIsolate());
Environment* env = Environment::GetCurrent(args.GetIsolate());
new UDPWrap(env, args.This());
}
void UDPWrap::GetFD(Local<String>, const PropertyCallbackInfo<Value>& args) {
#if !defined(_WIN32)
HandleScope scope(node_isolate);
UDPWrap* wrap = Unwrap<UDPWrap>(args.This());
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);
UDPWrap* wrap = Unwrap<UDPWrap>(args.This());
// 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();
char addr[sizeof(sockaddr_in6)];
int err;
switch (family) {
case AF_INET:
err = uv_ip4_addr(*address, port, reinterpret_cast<sockaddr_in*>(&addr));
break;
case AF_INET6:
err = uv_ip6_addr(*address, port, reinterpret_cast<sockaddr_in6*>(&addr));
break;
default:
assert(0 && "unexpected address family");
abort();
}
if (err == 0) {
err = uv_udp_bind(&wrap->handle_,
reinterpret_cast<const sockaddr*>(&addr),
flags);
}
args.GetReturnValue().Set(err);
}
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); \
UDPWrap* wrap = Unwrap<UDPWrap>(args.This()); \
assert(args.Length() == 1); \
int flag = args[0]->Int32Value(); \
int err = fn(&wrap->handle_, flag); \
args.GetReturnValue().Set(err); \
}
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);
UDPWrap* wrap = Unwrap<UDPWrap>(args.This());
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 err = uv_udp_set_membership(&wrap->handle_,
*address,
iface_cstr,
membership);
args.GetReturnValue().Set(err);
}
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 handle_scope(args.GetIsolate());
Environment* env = Environment::GetCurrent(args.GetIsolate());
UDPWrap* wrap = Unwrap<UDPWrap>(args.This());
// send(req, buffer, offset, length, port, address)
assert(args[0]->IsObject());
assert(Buffer::HasInstance(args[1]));
assert(args[2]->IsUint32());
assert(args[3]->IsUint32());
assert(args[4]->IsUint32());
assert(args[5]->IsString());
assert(args[6]->IsBoolean());
Local<Object> req_wrap_obj = args[0].As<Object>();
Local<Object> buffer_obj = args[1].As<Object>();
size_t offset = args[2]->Uint32Value();
size_t length = args[3]->Uint32Value();
const unsigned short port = args[4]->Uint32Value();
String::Utf8Value address(args[5]);
const bool have_callback = args[6]->IsTrue();
assert(offset < Buffer::Length(buffer_obj));
assert(length <= Buffer::Length(buffer_obj) - offset);
SendWrap* req_wrap = new SendWrap(env, req_wrap_obj, have_callback);
uv_buf_t buf = uv_buf_init(Buffer::Data(buffer_obj) + offset,
length);
char addr[sizeof(sockaddr_in6)];
int err;
switch (family) {
case AF_INET:
err = uv_ip4_addr(*address, port, reinterpret_cast<sockaddr_in*>(&addr));
break;
case AF_INET6:
err = uv_ip6_addr(*address, port, reinterpret_cast<sockaddr_in6*>(&addr));
break;
default:
assert(0 && "unexpected address family");
abort();
}
if (err == 0) {
err = uv_udp_send(&req_wrap->req_,
&wrap->handle_,
&buf,
1,
reinterpret_cast<const sockaddr*>(&addr),
OnSend);
}
req_wrap->Dispatched();
if (err)
delete req_wrap;
args.GetReturnValue().Set(err);
}
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);
UDPWrap* wrap = Unwrap<UDPWrap>(args.This());
int err = uv_udp_recv_start(&wrap->handle_, OnAlloc, OnRecv);
// UV_EALREADY means that the socket is already bound but that's okay
if (err == UV_EALREADY)
err = 0;
args.GetReturnValue().Set(err);
}
void UDPWrap::RecvStop(const FunctionCallbackInfo<Value>& args) {
HandleScope scope(node_isolate);
UDPWrap* wrap = Unwrap<UDPWrap>(args.This());
int r = uv_udp_recv_stop(&wrap->handle_);
args.GetReturnValue().Set(r);
}
void UDPWrap::GetSockName(const FunctionCallbackInfo<Value>& args) {
HandleScope handle_scope(args.GetIsolate());
Environment* env = Environment::GetCurrent(args.GetIsolate());
struct sockaddr_storage address;
UDPWrap* wrap = Unwrap<UDPWrap>(args.This());
assert(args[0]->IsObject());
Local<Object> obj = args[0].As<Object>();
int addrlen = sizeof(address);
int err = uv_udp_getsockname(&wrap->handle_,
reinterpret_cast<sockaddr*>(&address),
&addrlen);
if (err == 0) {
const sockaddr* addr = reinterpret_cast<const sockaddr*>(&address);
AddressToJS(env, addr, obj);
}
args.GetReturnValue().Set(err);
}
// TODO(bnoordhuis) share with StreamWrap::AfterWrite() in stream_wrap.cc
void UDPWrap::OnSend(uv_udp_send_t* req, int status) {
SendWrap* req_wrap = static_cast<SendWrap*>(req->data);
if (req_wrap->have_callback()) {
Environment* env = req_wrap->env();
HandleScope handle_scope(env->isolate());
Context::Scope context_scope(env->context());
Local<Value> arg = Integer::New(status, node_isolate);
req_wrap->MakeCallback(env->oncomplete_string(), 1, &arg);
}
delete req_wrap;
}
void UDPWrap::OnAlloc(uv_handle_t* handle,
size_t suggested_size,
uv_buf_t* buf) {
buf->base = static_cast<char*>(malloc(suggested_size));
buf->len = suggested_size;
if (buf->base == NULL && suggested_size > 0) {
FatalError("node::UDPWrap::OnAlloc(uv_handle_t*, size_t, uv_buf_t*)",
"Out Of Memory");
}
}
void UDPWrap::OnRecv(uv_udp_t* handle,
ssize_t nread,
const uv_buf_t* buf,
const struct sockaddr* addr,
unsigned int flags) {
if (nread == 0) {
if (buf->base != NULL)
free(buf->base);
return;
}
UDPWrap* wrap = static_cast<UDPWrap*>(handle->data);
Environment* env = wrap->env();
HandleScope handle_scope(env->isolate());
Context::Scope context_scope(env->context());
Local<Object> wrap_obj = wrap->object();
Local<Value> argv[] = {
Integer::New(nread, node_isolate),
wrap_obj,
Undefined(env->isolate()),
Undefined(env->isolate())
};
if (nread < 0) {
if (buf->base != NULL)
free(buf->base);
wrap->MakeCallback(env->onmessage_string(), ARRAY_SIZE(argv), argv);
return;
}
char* base = static_cast<char*>(realloc(buf->base, nread));
argv[2] = Buffer::Use(env, base, nread);
argv[3] = AddressToJS(env, addr);
wrap->MakeCallback(env->onmessage_string(), ARRAY_SIZE(argv), argv);
}
Local<Object> UDPWrap::Instantiate(Environment* env) {
// If this assert fires then Initialize hasn't been called yet.
assert(env->udp_constructor_function().IsEmpty() == false);
return env->udp_constructor_function()->NewInstance();
}
uv_udp_t* UDPWrap::UVHandle() {
return &handle_;
}
} // namespace node
NODE_MODULE_CONTEXT_AWARE(node_udp_wrap, node::UDPWrap::Initialize)
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