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// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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#include <node.h>
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#include <node_buffer.h>
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#include <req_wrap.h>
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#include <handle_wrap.h>
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#include <stdlib.h>
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// Temporary hack: libuv should provide uv_inet_pton and uv_inet_ntop.
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// Clean this up in tcp_wrap.cc too.
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#if defined(__MINGW32__) || defined(_MSC_VER)
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extern "C" {
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# include <inet_net_pton.h>
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# include <inet_ntop.h>
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}
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# define uv_inet_pton ares_inet_pton
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# define uv_inet_ntop ares_inet_ntop
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#else // __POSIX__
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# include <arpa/inet.h>
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# define uv_inet_pton inet_pton
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# define uv_inet_ntop inet_ntop
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#endif
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using namespace v8;
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namespace node {
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#define UNWRAP \
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assert(!args.Holder().IsEmpty()); \
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assert(args.Holder()->InternalFieldCount() > 0); \
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UDPWrap* wrap = \
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static_cast<UDPWrap*>(args.Holder()->GetPointerFromInternalField(0)); \
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if (!wrap) { \
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uv_err_t err; \
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err.code = UV_EBADF; \
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SetErrno(err); \
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return scope.Close(Integer::New(-1)); \
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}
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#define SLAB_SIZE (1024 * 1024)
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#define MIN(a, b) ((a) < (b) ? (a) : (b))
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// TODO share with tcp_wrap.cc
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Persistent<String> address_symbol;
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Persistent<String> port_symbol;
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Persistent<String> buffer_sym;
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static Persistent<String> udp_slab_sym;
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void AddressToJS(Handle<Object> info,
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const sockaddr* addr,
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int addrlen);
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typedef ReqWrap<uv_udp_send_t> SendWrap;
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static size_t slab_used;
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size_t slab_offset_;
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static uv_handle_t* handle_that_last_alloced;
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class UDPWrap: public HandleWrap {
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public:
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static void Initialize(Handle<Object> target);
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static Handle<Value> New(const Arguments& args);
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static Handle<Value> Bind(const Arguments& args);
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static Handle<Value> Send(const Arguments& args);
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static Handle<Value> Bind6(const Arguments& args);
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static Handle<Value> Send6(const Arguments& args);
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static Handle<Value> RecvStart(const Arguments& args);
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static Handle<Value> RecvStop(const Arguments& args);
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static Handle<Value> GetSockName(const Arguments& args);
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static Handle<Value> AddMembership(const Arguments& args);
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static Handle<Value> DropMembership(const Arguments& args);
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static Handle<Value> SetMulticastTTL(const Arguments& args);
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static Handle<Value> SetMulticastLoopback(const Arguments& args);
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static Handle<Value> SetBroadcast(const Arguments& args);
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static Handle<Value> SetTTL(const Arguments& args);
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private:
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static inline char* NewSlab(v8::Handle<v8::Object> global, v8::Handle<v8::Object> wrap_obj);
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UDPWrap(Handle<Object> object);
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virtual ~UDPWrap();
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static Handle<Value> DoBind(const Arguments& args, int family);
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static Handle<Value> DoSend(const Arguments& args, int family);
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static Handle<Value> SetMembership(const Arguments& args,
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uv_membership membership);
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static uv_buf_t OnAlloc(uv_handle_t* handle, size_t suggested_size);
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static void OnSend(uv_udp_send_t* req, int status);
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static void OnRecv(uv_udp_t* handle,
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ssize_t nread,
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uv_buf_t buf,
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struct sockaddr* addr,
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unsigned flags);
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uv_udp_t handle_;
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};
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UDPWrap::UDPWrap(Handle<Object> object): HandleWrap(object,
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(uv_handle_t*)&handle_) {
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int r = uv_udp_init(uv_default_loop(), &handle_);
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assert(r == 0); // can't fail anyway
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handle_.data = reinterpret_cast<void*>(this);
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}
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UDPWrap::~UDPWrap() {
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}
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void UDPWrap::Initialize(Handle<Object> target) {
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HandleWrap::Initialize(target);
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HandleScope scope;
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udp_slab_sym = Persistent<String>::New(String::NewSymbol("udpslab"));
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buffer_sym = NODE_PSYMBOL("buffer");
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port_symbol = NODE_PSYMBOL("port");
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address_symbol = NODE_PSYMBOL("address");
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Local<FunctionTemplate> t = FunctionTemplate::New(New);
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t->InstanceTemplate()->SetInternalFieldCount(1);
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t->SetClassName(String::NewSymbol("UDP"));
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NODE_SET_PROTOTYPE_METHOD(t, "bind", Bind);
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NODE_SET_PROTOTYPE_METHOD(t, "send", Send);
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NODE_SET_PROTOTYPE_METHOD(t, "bind6", Bind6);
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NODE_SET_PROTOTYPE_METHOD(t, "send6", Send6);
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NODE_SET_PROTOTYPE_METHOD(t, "close", Close);
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NODE_SET_PROTOTYPE_METHOD(t, "recvStart", RecvStart);
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NODE_SET_PROTOTYPE_METHOD(t, "recvStop", RecvStop);
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NODE_SET_PROTOTYPE_METHOD(t, "getsockname", GetSockName);
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NODE_SET_PROTOTYPE_METHOD(t, "addMembership", AddMembership);
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NODE_SET_PROTOTYPE_METHOD(t, "dropMembership", DropMembership);
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NODE_SET_PROTOTYPE_METHOD(t, "setMulticastTTL", SetMulticastTTL);
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NODE_SET_PROTOTYPE_METHOD(t, "setMulticastLoopback", SetMulticastLoopback);
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NODE_SET_PROTOTYPE_METHOD(t, "setBroadcast", SetBroadcast);
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NODE_SET_PROTOTYPE_METHOD(t, "setTTL", SetTTL);
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target->Set(String::NewSymbol("UDP"),
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Persistent<FunctionTemplate>::New(t)->GetFunction());
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}
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Handle<Value> UDPWrap::New(const Arguments& args) {
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HandleScope scope;
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assert(args.IsConstructCall());
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new UDPWrap(args.This());
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return scope.Close(args.This());
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}
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Handle<Value> UDPWrap::DoBind(const Arguments& args, int family) {
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HandleScope scope;
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int r;
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UNWRAP
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// bind(ip, port, flags)
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assert(args.Length() == 3);
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String::Utf8Value address(args[0]->ToString());
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const int port = args[1]->Uint32Value();
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const int flags = args[2]->Uint32Value();
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switch (family) {
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case AF_INET:
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r = uv_udp_bind(&wrap->handle_, uv_ip4_addr(*address, port), flags);
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break;
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case AF_INET6:
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r = uv_udp_bind6(&wrap->handle_, uv_ip6_addr(*address, port), flags);
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break;
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default:
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assert(0 && "unexpected address family");
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abort();
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}
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if (r)
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SetErrno(uv_last_error(uv_default_loop()));
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return scope.Close(Integer::New(r));
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}
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Handle<Value> UDPWrap::Bind(const Arguments& args) {
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return DoBind(args, AF_INET);
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}
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Handle<Value> UDPWrap::Bind6(const Arguments& args) {
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return DoBind(args, AF_INET6);
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}
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#define X(name, fn) \
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Handle<Value> UDPWrap::name(const Arguments& args) { \
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HandleScope scope; \
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UNWRAP \
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assert(args.Length() == 1); \
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int flag = args[0]->Int32Value(); \
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int r = fn(&wrap->handle_, flag); \
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if (r) SetErrno(uv_last_error(uv_default_loop())); \
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return scope.Close(Integer::New(r)); \
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}
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X(SetTTL, uv_udp_set_ttl)
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X(SetBroadcast, uv_udp_set_broadcast)
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X(SetMulticastTTL, uv_udp_set_multicast_ttl)
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X(SetMulticastLoopback, uv_udp_set_multicast_loop)
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#undef X
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Handle<Value> UDPWrap::SetMembership(const Arguments& args,
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uv_membership membership) {
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HandleScope scope;
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UNWRAP
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assert(args.Length() == 2);
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String::Utf8Value address(args[0]->ToString());
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String::Utf8Value iface(args[1]->ToString());
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const char* iface_cstr = *iface;
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if (args[1]->IsUndefined() || args[1]->IsNull()) {
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iface_cstr = NULL;
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}
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int r = uv_udp_set_membership(&wrap->handle_, *address, iface_cstr,
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membership);
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if (r)
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SetErrno(uv_last_error(uv_default_loop()));
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return scope.Close(Integer::New(r));
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}
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Handle<Value> UDPWrap::AddMembership(const Arguments& args) {
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return SetMembership(args, UV_JOIN_GROUP);
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}
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Handle<Value> UDPWrap::DropMembership(const Arguments& args) {
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return SetMembership(args, UV_LEAVE_GROUP);
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}
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Handle<Value> UDPWrap::DoSend(const Arguments& args, int family) {
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HandleScope scope;
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int r;
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// send(buffer, offset, length, port, address)
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assert(args.Length() == 5);
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UNWRAP
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assert(Buffer::HasInstance(args[0]));
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Local<Object> buffer_obj = args[0]->ToObject();
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size_t offset = args[1]->Uint32Value();
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size_t length = args[2]->Uint32Value();
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assert(offset < Buffer::Length(buffer_obj));
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assert(length <= Buffer::Length(buffer_obj) - offset);
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SendWrap* req_wrap = new SendWrap();
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req_wrap->object_->SetHiddenValue(buffer_sym, buffer_obj);
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uv_buf_t buf = uv_buf_init(Buffer::Data(buffer_obj) + offset,
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length);
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const unsigned short port = args[3]->Uint32Value();
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String::Utf8Value address(args[4]->ToString());
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switch (family) {
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case AF_INET:
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r = uv_udp_send(&req_wrap->req_, &wrap->handle_, &buf, 1,
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uv_ip4_addr(*address, port), OnSend);
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break;
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case AF_INET6:
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r = uv_udp_send6(&req_wrap->req_, &wrap->handle_, &buf, 1,
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uv_ip6_addr(*address, port), OnSend);
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break;
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default:
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assert(0 && "unexpected address family");
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abort();
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}
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req_wrap->Dispatched();
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if (r) {
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SetErrno(uv_last_error(uv_default_loop()));
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delete req_wrap;
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return Null();
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}
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else {
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return scope.Close(req_wrap->object_);
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}
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}
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Handle<Value> UDPWrap::Send(const Arguments& args) {
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return DoSend(args, AF_INET);
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}
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Handle<Value> UDPWrap::Send6(const Arguments& args) {
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return DoSend(args, AF_INET6);
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}
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Handle<Value> UDPWrap::RecvStart(const Arguments& args) {
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HandleScope scope;
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UNWRAP
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// UV_EALREADY means that the socket is already bound but that's okay
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int r = uv_udp_recv_start(&wrap->handle_, OnAlloc, OnRecv);
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if (r && uv_last_error(uv_default_loop()).code != UV_EALREADY) {
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SetErrno(uv_last_error(uv_default_loop()));
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return False();
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}
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return True();
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}
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Handle<Value> UDPWrap::RecvStop(const Arguments& args) {
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HandleScope scope;
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UNWRAP
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int r = uv_udp_recv_stop(&wrap->handle_);
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return scope.Close(Integer::New(r));
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}
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Handle<Value> UDPWrap::GetSockName(const Arguments& args) {
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HandleScope scope;
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struct sockaddr_storage address;
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UNWRAP
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int addrlen = sizeof(address);
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int r = uv_udp_getsockname(&wrap->handle_,
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reinterpret_cast<sockaddr*>(&address),
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&addrlen);
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if (r == 0) {
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Local<Object> sockname = Object::New();
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|
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)
|