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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 <stdlib.h>
// 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 {
#define UNWRAP \
assert(!args.Holder().IsEmpty()); \
assert(args.Holder()->InternalFieldCount() > 0); \
UDPWrap* wrap = \
static_cast<UDPWrap*>(args.Holder()->GetPointerFromInternalField(0)); \
if (!wrap) { \
uv_err_t err; \
err.code = UV_EBADF; \
SetErrno(err); \
return scope.Close(Integer::New(-1)); \
}
#define SLAB_SIZE (1024 * 1024)
#define MIN(a, b) ((a) < (b) ? (a) : (b))
// TODO share with tcp_wrap.cc
Persistent<String> address_symbol;
Persistent<String> port_symbol;
Persistent<String> buffer_sym;
static Persistent<String> udp_slab_sym;
void AddressToJS(Handle<Object> info,
const sockaddr* addr,
int addrlen);
typedef ReqWrap<uv_udp_send_t> SendWrap;
static size_t slab_used;
size_t slab_offset_;
static uv_handle_t* handle_that_last_alloced;
class UDPWrap: public HandleWrap {
public:
static void Initialize(Handle<Object> target);
static Handle<Value> New(const Arguments& args);
static Handle<Value> Bind(const Arguments& args);
static Handle<Value> Send(const Arguments& args);
static Handle<Value> Bind6(const Arguments& args);
static Handle<Value> Send6(const Arguments& args);
static Handle<Value> RecvStart(const Arguments& args);
static Handle<Value> RecvStop(const Arguments& args);
static Handle<Value> GetSockName(const Arguments& args);
static Handle<Value> AddMembership(const Arguments& args);
static Handle<Value> DropMembership(const Arguments& args);
static Handle<Value> SetMulticastTTL(const Arguments& args);
static Handle<Value> SetMulticastLoopback(const Arguments& args);
static Handle<Value> SetBroadcast(const Arguments& args);
static Handle<Value> SetTTL(const Arguments& args);
private:
static inline char* NewSlab(v8::Handle<v8::Object> global, v8::Handle<v8::Object> wrap_obj);
UDPWrap(Handle<Object> object);
virtual ~UDPWrap();
static Handle<Value> DoBind(const Arguments& args, int family);
static Handle<Value> DoSend(const Arguments& args, int family);
static Handle<Value> SetMembership(const Arguments& args,
uv_membership membership);
static uv_buf_t OnAlloc(uv_handle_t* handle, size_t suggested_size);
static void OnSend(uv_udp_send_t* req, int status);
static void OnRecv(uv_udp_t* handle,
ssize_t nread,
uv_buf_t buf,
struct sockaddr* addr,
unsigned flags);
uv_udp_t handle_;
};
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);
HandleScope scope;
udp_slab_sym = Persistent<String>::New(String::NewSymbol("udpslab"));
buffer_sym = NODE_PSYMBOL("buffer");
port_symbol = NODE_PSYMBOL("port");
address_symbol = NODE_PSYMBOL("address");
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
// bind(ip, port, flags)
assert(args.Length() == 3);
String::Utf8Value address(args[0]->ToString());
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 \
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
assert(args.Length() == 2);
String::Utf8Value address(args[0]->ToString());
String::Utf8Value interface(args[1]->ToString());
const char* interface_cstr = *interface;
if (args[1]->IsUndefined() || args[1]->IsNull()) {
interface_cstr = NULL;
}
int r = uv_udp_set_membership(&wrap->handle_, *address, interface_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
assert(Buffer::HasInstance(args[0]));
Local<Object> buffer_obj = args[0]->ToObject();
size_t offset = args[1]->Uint32Value();
size_t length = args[2]->Uint32Value();
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]->ToString());
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
// 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
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
int addrlen = sizeof(address);
int r = uv_udp_getsockname(&wrap->handle_,
reinterpret_cast<sockaddr*>(&address),
&addrlen);
if (r == 0) {
Local<Object> sockname = Object::New();
AddressToJS(sockname, reinterpret_cast<sockaddr*>(&address), addrlen);
return scope.Close(sockname);
}
else {
SetErrno(uv_last_error(uv_default_loop()));
return Null();
}
}
// 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", 4, argv);
delete req_wrap;
}
uv_buf_t UDPWrap::OnAlloc(uv_handle_t* handle, size_t suggested_size) {
HandleScope scope;
UDPWrap* wrap = static_cast<UDPWrap*>(handle->data);
char* slab = NULL;
Handle<Object> global = Context::GetCurrent()->Global();
Local<Value> slab_v = global->GetHiddenValue(udp_slab_sym);
if (slab_v.IsEmpty()) {
// No slab currently. Create a new one.
slab = NewSlab(global, wrap->object_);
} else {
// Use existing slab.
Local<Object> slab_obj = slab_v->ToObject();
slab = Buffer::Data(slab_obj);
assert(Buffer::Length(slab_obj) == SLAB_SIZE);
assert(SLAB_SIZE >= slab_used);
// If less than 64kb is remaining on the slab allocate a new one.
if (SLAB_SIZE - slab_used < 64 * 1024) {
slab = NewSlab(global, wrap->object_);
} else {
wrap->object_->SetHiddenValue(udp_slab_sym, slab_obj);
}
}
uv_buf_t buf;
buf.base = slab + slab_used;
buf.len = MIN(SLAB_SIZE - slab_used, suggested_size);
slab_offset_ = slab_used;
slab_used += buf.len;
handle_that_last_alloced = reinterpret_cast<uv_handle_t*>(handle);
return buf;
}
void UDPWrap::OnRecv(uv_udp_t* handle,
ssize_t nread,
uv_buf_t buf,
struct sockaddr* addr,
unsigned flags) {
if (nread == 0) {
return;
}
HandleScope scope;
UDPWrap* wrap = reinterpret_cast<UDPWrap*>(handle->data);
Handle<Value> argv[4] = {
wrap->object_,
Integer::New(nread),
Null(),
Null()
};
if (nread == -1) {
SetErrno(uv_last_error(uv_default_loop()));
}
else {
Local<Object> rinfo = Object::New();
AddressToJS(rinfo, addr, sizeof *addr);
argv[2] = Buffer::New(buf.base, nread, NULL, NULL)->handle_;
argv[3] = rinfo;
}
MakeCallback(wrap->object_, "onmessage", ARRAY_SIZE(argv), argv);
}
inline char* UDPWrap::NewSlab(Handle<Object> global,
Handle<Object> wrap_obj) {
Buffer* b = Buffer::New(SLAB_SIZE);
global->SetHiddenValue(udp_slab_sym, b->handle_);
assert(Buffer::Length(b) == SLAB_SIZE);
slab_used = 0;
wrap_obj->SetHiddenValue(udp_slab_sym, b->handle_);
return Buffer::Data(b);
}
void AddressToJS(Handle<Object> info,
const sockaddr* addr,
int addrlen) {
char ip[INET6_ADDRSTRLEN];
const sockaddr_in *a4;
const sockaddr_in6 *a6;
int port;
assert(addr != NULL);
if (addrlen == 0) {
info->Set(address_symbol, String::Empty());
return;
}
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);
port = ntohs(a6->sin6_port);
info->Set(address_symbol, String::New(ip));
info->Set(port_symbol, Integer::New(port));
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);
info->Set(address_symbol, String::New(ip));
info->Set(port_symbol, Integer::New(port));
break;
default:
info->Set(address_symbol, String::Empty());
}
}
} // namespace node
NODE_MODULE(node_udp_wrap, node::UDPWrap::Initialize)
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