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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 "slab_allocator.h"
#include "req_wrap.h"
#include "handle_wrap.h"
#include "udp_wrap.h"
#include <stdlib.h>
#define SLAB_SIZE (1024 * 1024)
// Temporary hack: libuv should provide uv_inet_pton and uv_inet_ntop.
// Clean this up in tcp_wrap.cc too.
#if defined(__MINGW32__) || defined(_MSC_VER)
extern "C" {
# include <inet_net_pton.h>
# include <inet_ntop.h>
}
# define uv_inet_pton ares_inet_pton
# define uv_inet_ntop ares_inet_ntop
#else // __POSIX__
# include <arpa/inet.h>
# define uv_inet_pton inet_pton
# define uv_inet_ntop inet_ntop
#endif
using namespace v8;
namespace node {
typedef ReqWrap<uv_udp_send_t> SendWrap;
// see tcp_wrap.cc
Local<Object> AddressToJS(const sockaddr* addr);
static Persistent<String> buffer_sym;
static Persistent<String> oncomplete_sym;
static Persistent<String> onmessage_sym;
static SlabAllocator* slab_allocator;
static void DeleteSlabAllocator(void*) {
delete slab_allocator;
slab_allocator = NULL;
}
UDPWrap::UDPWrap(Handle<Object> object): HandleWrap(object,
(uv_handle_t*)&handle_) {
int r = uv_udp_init(uv_default_loop(), &handle_);
assert(r == 0); // can't fail anyway
handle_.data = reinterpret_cast<void*>(this);
}
UDPWrap::~UDPWrap() {
}
void UDPWrap::Initialize(Handle<Object> target) {
HandleWrap::Initialize(target);
slab_allocator = new SlabAllocator(SLAB_SIZE);
AtExit(DeleteSlabAllocator, NULL);
HandleScope scope;
buffer_sym = NODE_PSYMBOL("buffer");
oncomplete_sym = NODE_PSYMBOL("oncomplete");
onmessage_sym = NODE_PSYMBOL("onmessage");
Local<FunctionTemplate> t = FunctionTemplate::New(New);
t->InstanceTemplate()->SetInternalFieldCount(1);
t->SetClassName(String::NewSymbol("UDP"));
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);
target->Set(String::NewSymbol("UDP"),
Persistent<FunctionTemplate>::New(t)->GetFunction());
}
Handle<Value> UDPWrap::New(const Arguments& args) {
HandleScope scope;
assert(args.IsConstructCall());
new UDPWrap(args.This());
return scope.Close(args.This());
}
Handle<Value> UDPWrap::DoBind(const Arguments& args, int family) {
HandleScope scope;
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()));
return scope.Close(Integer::New(r));
}
Handle<Value> UDPWrap::Bind(const Arguments& args) {
return DoBind(args, AF_INET);
}
Handle<Value> UDPWrap::Bind6(const Arguments& args) {
return DoBind(args, AF_INET6);
}
#define X(name, fn) \
Handle<Value> UDPWrap::name(const Arguments& args) { \
HandleScope scope; \
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())); \
return scope.Close(Integer::New(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
Handle<Value> UDPWrap::SetMembership(const Arguments& args,
uv_membership membership) {
HandleScope scope;
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()));
return scope.Close(Integer::New(r));
}
Handle<Value> UDPWrap::AddMembership(const Arguments& args) {
return SetMembership(args, UV_JOIN_GROUP);
}
Handle<Value> UDPWrap::DropMembership(const Arguments& args) {
return SetMembership(args, UV_LEAVE_GROUP);
}
Handle<Value> UDPWrap::DoSend(const Arguments& args, int family) {
HandleScope scope;
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;
return Null();
}
else {
return scope.Close(req_wrap->object_);
}
}
Handle<Value> UDPWrap::Send(const Arguments& args) {
return DoSend(args, AF_INET);
}
Handle<Value> UDPWrap::Send6(const Arguments& args) {
return DoSend(args, AF_INET6);
}
Handle<Value> UDPWrap::RecvStart(const Arguments& args) {
HandleScope scope;
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);
if (r && uv_last_error(uv_default_loop()).code != UV_EALREADY) {
SetErrno(uv_last_error(uv_default_loop()));
return False();
}
return True();
}
Handle<Value> UDPWrap::RecvStop(const Arguments& args) {
HandleScope scope;
UNWRAP(UDPWrap)
int r = uv_udp_recv_stop(&wrap->handle_);
return scope.Close(Integer::New(r));
}
Handle<Value> UDPWrap::GetSockName(const Arguments& args) {
HandleScope scope;
struct sockaddr_storage address;
UNWRAP(UDPWrap)
int addrlen = sizeof(address);
int r = uv_udp_getsockname(&wrap->handle_,
reinterpret_cast<sockaddr*>(&address),
&addrlen);
if (r) {
SetErrno(uv_last_error(uv_default_loop()));
return Null();
}
const sockaddr* addr = reinterpret_cast<const sockaddr*>(&address);
return scope.Close(AddressToJS(addr));
}
// TODO share with StreamWrap::AfterWrite() in stream_wrap.cc
void UDPWrap::OnSend(uv_udp_send_t* req, int status) {
HandleScope scope;
assert(req != NULL);
SendWrap* req_wrap = reinterpret_cast<SendWrap*>(req->data);
UDPWrap* wrap = reinterpret_cast<UDPWrap*>(req->handle->data);
assert(req_wrap->object_.IsEmpty() == false);
assert(wrap->object_.IsEmpty() == false);
if (status) {
SetErrno(uv_last_error(uv_default_loop()));
}
Local<Value> argv[4] = {
Integer::New(status),
Local<Value>::New(wrap->object_),
Local<Value>::New(req_wrap->object_),
req_wrap->object_->GetHiddenValue(buffer_sym),
};
MakeCallback(req_wrap->object_, oncomplete_sym, ARRAY_SIZE(argv), argv);
delete req_wrap;
}
uv_buf_t UDPWrap::OnAlloc(uv_handle_t* handle, size_t suggested_size) {
UDPWrap* wrap = static_cast<UDPWrap*>(handle->data);
char* buf = slab_allocator->Allocate(wrap->object_, suggested_size);
return uv_buf_init(buf, suggested_size);
}
void UDPWrap::OnRecv(uv_udp_t* handle,
ssize_t nread,
uv_buf_t buf,
struct sockaddr* addr,
unsigned flags) {
HandleScope scope;
UDPWrap* wrap = reinterpret_cast<UDPWrap*>(handle->data);
Local<Object> slab = slab_allocator->Shrink(wrap->object_,
buf.base,
nread < 0 ? 0 : nread);
if (nread == 0) return;
if (nread < 0) {
Local<Value> argv[] = { Local<Object>::New(wrap->object_) };
SetErrno(uv_last_error(uv_default_loop()));
MakeCallback(wrap->object_, onmessage_sym, ARRAY_SIZE(argv), argv);
return;
}
Local<Value> argv[] = {
Local<Object>::New(wrap->object_),
slab,
Integer::NewFromUnsigned(buf.base - Buffer::Data(slab)),
Integer::NewFromUnsigned(nread),
AddressToJS(addr)
};
MakeCallback(wrap->object_, onmessage_sym, ARRAY_SIZE(argv), argv);
}
UDPWrap* UDPWrap::Unwrap(Local<Object> obj) {
assert(!obj.IsEmpty());
assert(obj->InternalFieldCount() > 0);
return static_cast<UDPWrap*>(obj->GetPointerFromInternalField(0));
}
uv_udp_t* UDPWrap::UVHandle() {
return &handle_;
}
} // namespace node
NODE_MODULE(node_udp_wrap, node::UDPWrap::Initialize)
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