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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 "handle_wrap.h"
#include "stream_wrap.h"
#include "pipe_wrap.h"
#include "tcp_wrap.h"
#include "req_wrap.h"
#include "udp_wrap.h"
#include "node_counters.h"
#include <stdlib.h> // abort()
#include <limits.h> // INT_MAX
namespace node {
using v8::Array;
using v8::FunctionCallbackInfo;
using v8::Handle;
using v8::HandleScope;
using v8::Integer;
using v8::Local;
using v8::Number;
using v8::Object;
using v8::PropertyCallbackInfo;
using v8::String;
using v8::Value;
static Cached<String> buffer_sym;
static Cached<String> bytes_sym;
static Cached<String> write_queue_size_sym;
static Cached<String> onread_sym;
static Cached<String> oncomplete_sym;
static Cached<String> handle_sym;
static bool initialized;
void StreamWrap::Initialize(Handle<Object> target) {
if (initialized) return;
initialized = true;
HandleScope scope(node_isolate);
HandleWrap::Initialize(target);
buffer_sym = String::New("buffer");
bytes_sym = String::New("bytes");
write_queue_size_sym = String::New("writeQueueSize");
onread_sym = String::New("onread");
oncomplete_sym = String::New("oncomplete");
}
StreamWrap::StreamWrap(Handle<Object> object, uv_stream_t* stream)
: HandleWrap(object, reinterpret_cast<uv_handle_t*>(stream)),
default_callbacks_(this) {
stream_ = stream;
callbacks_ = &default_callbacks_;
}
void StreamWrap::GetFD(Local<String>, const PropertyCallbackInfo<Value>& args) {
#if !defined(_WIN32)
HandleScope scope(node_isolate);
UNWRAP_NO_ABORT(StreamWrap)
int fd = -1;
if (wrap != NULL && wrap->stream_ != NULL) fd = wrap->stream_->io_watcher.fd;
args.GetReturnValue().Set(fd);
#endif
}
void StreamWrap::UpdateWriteQueueSize() {
HandleScope scope(node_isolate);
object()->Set(write_queue_size_sym,
Integer::New(stream_->write_queue_size, node_isolate));
}
void StreamWrap::ReadStart(const FunctionCallbackInfo<Value>& args) {
HandleScope scope(node_isolate);
UNWRAP(StreamWrap)
bool ipc_pipe = wrap->stream_->type == UV_NAMED_PIPE &&
reinterpret_cast<uv_pipe_t*>(wrap->stream_)->ipc;
int r;
if (ipc_pipe) {
r = uv_read2_start(wrap->stream_, OnAlloc, OnRead2);
} else {
r = uv_read_start(wrap->stream_, OnAlloc, OnRead);
}
// Error starting the tcp.
if (r) SetErrno(uv_last_error(uv_default_loop()));
args.GetReturnValue().Set(r);
}
void StreamWrap::ReadStop(const FunctionCallbackInfo<Value>& args) {
HandleScope scope(node_isolate);
UNWRAP(StreamWrap)
int r = uv_read_stop(wrap->stream_);
// Error starting the tcp.
if (r) SetErrno(uv_last_error(uv_default_loop()));
args.GetReturnValue().Set(r);
}
uv_buf_t StreamWrap::OnAlloc(uv_handle_t* handle, size_t suggested_size) {
StreamWrap* wrap = static_cast<StreamWrap*>(handle->data);
assert(wrap->stream_ == reinterpret_cast<uv_stream_t*>(handle));
return wrap->callbacks_->DoAlloc(handle, suggested_size);
}
template <class WrapType, class UVType>
static Local<Object> AcceptHandle(uv_stream_t* pipe) {
HandleScope scope(node_isolate);
Local<Object> wrap_obj;
WrapType* wrap;
UVType* handle;
wrap_obj = WrapType::Instantiate();
if (wrap_obj.IsEmpty())
return Local<Object>();
wrap = static_cast<WrapType*>(
wrap_obj->GetAlignedPointerFromInternalField(0));
handle = wrap->UVHandle();
if (uv_accept(pipe, reinterpret_cast<uv_stream_t*>(handle)))
abort();
return scope.Close(wrap_obj);
}
void StreamWrap::OnReadCommon(uv_stream_t* handle,
ssize_t nread,
uv_buf_t buf,
uv_handle_type pending) {
HandleScope scope(node_isolate);
StreamWrap* wrap = static_cast<StreamWrap*>(handle->data);
// We should not be getting this callback if someone as already called
// uv_close() on the handle.
assert(wrap->persistent().IsEmpty() == false);
if (nread > 0) {
if (wrap->stream_->type == UV_TCP) {
NODE_COUNT_NET_BYTES_RECV(nread);
} else if (wrap->stream_->type == UV_NAMED_PIPE) {
NODE_COUNT_PIPE_BYTES_RECV(nread);
}
}
wrap->callbacks_->DoRead(handle, nread, buf, pending);
}
void StreamWrap::OnRead(uv_stream_t* handle, ssize_t nread, uv_buf_t buf) {
OnReadCommon(handle, nread, buf, UV_UNKNOWN_HANDLE);
}
void StreamWrap::OnRead2(uv_pipe_t* handle, ssize_t nread, uv_buf_t buf,
uv_handle_type pending) {
OnReadCommon(reinterpret_cast<uv_stream_t*>(handle), nread, buf, pending);
}
size_t StreamWrap::WriteBuffer(Handle<Value> val, uv_buf_t* buf) {
assert(Buffer::HasInstance(val));
// Simple non-writev case
buf->base = Buffer::Data(val);
buf->len = Buffer::Length(val);
return buf->len;
}
void StreamWrap::WriteBuffer(const FunctionCallbackInfo<Value>& args) {
HandleScope scope(node_isolate);
UNWRAP(StreamWrap)
// The first argument is a buffer.
assert(args.Length() >= 1 && Buffer::HasInstance(args[0]));
size_t length = Buffer::Length(args[0]);
char* storage = new char[sizeof(WriteWrap)];
WriteWrap* req_wrap = new (storage) WriteWrap(wrap);
Local<Object> req_wrap_obj = req_wrap->object();
req_wrap_obj->SetHiddenValue(buffer_sym, args[0]);
uv_buf_t buf;
WriteBuffer(args[0], &buf);
int r = wrap->callbacks_->DoWrite(req_wrap,
&buf,
1,
NULL,
StreamWrap::AfterWrite);
req_wrap->Dispatched();
req_wrap_obj->Set(bytes_sym, Integer::NewFromUnsigned(length, node_isolate));
if (r) {
SetErrno(uv_last_error(uv_default_loop()));
req_wrap->~WriteWrap();
delete[] storage;
} else {
args.GetReturnValue().Set(req_wrap->persistent());
}
}
template <enum encoding encoding>
void StreamWrap::WriteStringImpl(const FunctionCallbackInfo<Value>& args) {
HandleScope scope(node_isolate);
int r;
UNWRAP(StreamWrap)
if (args.Length() < 1)
return ThrowTypeError("Not enough arguments");
Local<String> string = args[0]->ToString();
// Compute the size of the storage that the string will be flattened into.
// For UTF8 strings that are very long, go ahead and take the hit for
// computing their actual size, rather than tripling the storage.
size_t storage_size;
if (encoding == UTF8 && string->Length() > 65535)
storage_size = StringBytes::Size(string, encoding);
else
storage_size = StringBytes::StorageSize(string, encoding);
if (storage_size > INT_MAX) {
uv_err_t err;
err.code = UV_ENOBUFS;
SetErrno(err);
return;
}
char* storage = new char[sizeof(WriteWrap) + storage_size + 15];
WriteWrap* req_wrap = new (storage) WriteWrap(wrap);
char* data = reinterpret_cast<char*>(ROUND_UP(
reinterpret_cast<uintptr_t>(storage) + sizeof(WriteWrap), 16));
size_t data_size;
data_size = StringBytes::Write(data, storage_size, string, encoding);
assert(data_size <= storage_size);
uv_buf_t buf;
buf.base = data;
buf.len = data_size;
bool ipc_pipe = wrap->stream_->type == UV_NAMED_PIPE &&
reinterpret_cast<uv_pipe_t*>(wrap->stream_)->ipc;
if (!ipc_pipe) {
r = wrap->callbacks_->DoWrite(req_wrap,
&buf,
1,
NULL,
StreamWrap::AfterWrite);
} else {
uv_handle_t* send_handle = NULL;
if (args[1]->IsObject()) {
Local<Object> send_handle_obj = args[1]->ToObject();
assert(send_handle_obj->InternalFieldCount() > 0);
HandleWrap* send_handle_wrap = static_cast<HandleWrap*>(
send_handle_obj->GetAlignedPointerFromInternalField(0));
send_handle = send_handle_wrap->GetHandle();
// Reference StreamWrap instance to prevent it from being garbage
// collected before `AfterWrite` is called.
if (handle_sym.IsEmpty()) {
handle_sym = String::New("handle");
}
assert(!req_wrap->persistent().IsEmpty());
req_wrap->object()->Set(handle_sym, send_handle_obj);
}
r = wrap->callbacks_->DoWrite(req_wrap,
&buf,
1,
reinterpret_cast<uv_stream_t*>(send_handle),
StreamWrap::AfterWrite);
}
req_wrap->Dispatched();
req_wrap->object()->Set(bytes_sym, Number::New(node_isolate, data_size));
if (r) {
SetErrno(uv_last_error(uv_default_loop()));
req_wrap->~WriteWrap();
delete[] storage;
} else {
args.GetReturnValue().Set(req_wrap->persistent());
}
}
void StreamWrap::Writev(const FunctionCallbackInfo<Value>& args) {
HandleScope scope;
UNWRAP(StreamWrap)
if (args.Length() < 1)
return ThrowTypeError("Not enough arguments");
if (!args[0]->IsArray())
return ThrowTypeError("Argument should be array");
Handle<Array> chunks = args[0].As<Array>();
size_t count = chunks->Length() >> 1;
uv_buf_t bufs_[16];
uv_buf_t* bufs = bufs_;
// Determine storage size first
size_t storage_size = 0;
for (size_t i = 0; i < count; i++) {
Handle<Value> chunk = chunks->Get(i * 2);
if (Buffer::HasInstance(chunk))
continue;
// Buffer chunk, no additional storage required
// String chunk
Handle<String> string = chunk->ToString();
enum encoding encoding = ParseEncoding(chunks->Get(i * 2 + 1));
size_t chunk_size;
if (encoding == UTF8 && string->Length() > 65535)
chunk_size = StringBytes::Size(string, encoding);
else
chunk_size = StringBytes::StorageSize(string, encoding);
storage_size += chunk_size + 15;
}
if (storage_size > INT_MAX) {
uv_err_t err;
err.code = UV_ENOBUFS;
SetErrno(err);
return;
}
if (ARRAY_SIZE(bufs_) < count)
bufs = new uv_buf_t[count];
storage_size += sizeof(WriteWrap);
char* storage = new char[storage_size];
WriteWrap* req_wrap = new (storage) WriteWrap(wrap);
uint32_t bytes = 0;
size_t offset = sizeof(WriteWrap);
for (size_t i = 0; i < count; i++) {
Handle<Value> chunk = chunks->Get(i * 2);
// Write buffer
if (Buffer::HasInstance(chunk)) {
bufs[i].base = Buffer::Data(chunk);
bufs[i].len = Buffer::Length(chunk);
bytes += bufs[i].len;
continue;
}
// Write string
offset = ROUND_UP(offset, 16);
assert(offset < storage_size);
char* str_storage = storage + offset;
size_t str_size = storage_size - offset;
Handle<String> string = chunk->ToString();
enum encoding encoding = ParseEncoding(chunks->Get(i * 2 + 1));
str_size = StringBytes::Write(str_storage, str_size, string, encoding);
bufs[i].base = str_storage;
bufs[i].len = str_size;
offset += str_size;
bytes += str_size;
}
int r = wrap->callbacks_->DoWrite(req_wrap,
bufs,
count,
NULL,
StreamWrap::AfterWrite);
// Deallocate space
if (bufs != bufs_)
delete[] bufs;
req_wrap->Dispatched();
req_wrap->object()->Set(bytes_sym, Number::New(node_isolate, bytes));
if (r) {
SetErrno(uv_last_error(uv_default_loop()));
req_wrap->~WriteWrap();
delete[] storage;
} else {
args.GetReturnValue().Set(req_wrap->persistent());
}
}
void StreamWrap::WriteAsciiString(const FunctionCallbackInfo<Value>& args) {
WriteStringImpl<ASCII>(args);
}
void StreamWrap::WriteUtf8String(const FunctionCallbackInfo<Value>& args) {
WriteStringImpl<UTF8>(args);
}
void StreamWrap::WriteUcs2String(const FunctionCallbackInfo<Value>& args) {
WriteStringImpl<UCS2>(args);
}
void StreamWrap::AfterWrite(uv_write_t* req, int status) {
WriteWrap* req_wrap = container_of(req, WriteWrap, req_);
StreamWrap* wrap = req_wrap->wrap_;
HandleScope scope(node_isolate);
// The wrap and request objects should still be there.
assert(req_wrap->persistent().IsEmpty() == false);
assert(wrap->persistent().IsEmpty() == false);
// Unref handle property
Local<Object> req_wrap_obj = req_wrap->object();
if (!handle_sym.IsEmpty()) {
req_wrap_obj->Delete(handle_sym);
}
if (status) {
SetErrno(uv_last_error(uv_default_loop()));
}
wrap->callbacks_->AfterWrite(req_wrap);
Local<Value> argv[] = {
Integer::New(status, node_isolate),
wrap->object(),
req_wrap_obj
};
MakeCallback(req_wrap_obj, oncomplete_sym, ARRAY_SIZE(argv), argv);
req_wrap->~WriteWrap();
delete[] reinterpret_cast<char*>(req_wrap);
}
void StreamWrap::Shutdown(const FunctionCallbackInfo<Value>& args) {
HandleScope scope(node_isolate);
UNWRAP(StreamWrap)
ShutdownWrap* req_wrap = new ShutdownWrap();
int r = wrap->callbacks_->DoShutdown(req_wrap, AfterShutdown);
req_wrap->Dispatched();
if (r) {
SetErrno(uv_last_error(uv_default_loop()));
delete req_wrap;
} else {
args.GetReturnValue().Set(req_wrap->persistent());
}
}
void StreamWrap::AfterShutdown(uv_shutdown_t* req, int status) {
ReqWrap<uv_shutdown_t>* req_wrap = (ReqWrap<uv_shutdown_t>*) req->data;
StreamWrap* wrap = (StreamWrap*) req->handle->data;
// The wrap and request objects should still be there.
assert(req_wrap->persistent().IsEmpty() == false);
assert(wrap->persistent().IsEmpty() == false);
HandleScope scope(node_isolate);
if (status) {
SetErrno(uv_last_error(uv_default_loop()));
}
Local<Object> req_wrap_obj = req_wrap->object();
Local<Value> argv[3] = {
Integer::New(status, node_isolate),
wrap->object(),
req_wrap_obj
};
MakeCallback(req_wrap_obj, oncomplete_sym, ARRAY_SIZE(argv), argv);
delete req_wrap;
}
int StreamWrapCallbacks::DoWrite(WriteWrap* w,
uv_buf_t* bufs,
size_t count,
uv_stream_t* send_handle,
uv_write_cb cb) {
int r;
if (send_handle == NULL) {
r = uv_write(&w->req_, wrap_->stream_, bufs, count, cb);
} else {
r = uv_write2(&w->req_, wrap_->stream_, bufs, count, send_handle, cb);
}
if (!r) {
size_t bytes = 0;
for (size_t i = 0; i < count; i++)
bytes += bufs[i].len;
if (wrap_->stream_->type == UV_TCP) {
NODE_COUNT_NET_BYTES_SENT(bytes);
} else if (wrap_->stream_->type == UV_NAMED_PIPE) {
NODE_COUNT_PIPE_BYTES_SENT(bytes);
}
}
wrap_->UpdateWriteQueueSize();
return r;
}
void StreamWrapCallbacks::AfterWrite(WriteWrap* w) {
wrap_->UpdateWriteQueueSize();
}
uv_buf_t StreamWrapCallbacks::DoAlloc(uv_handle_t* handle,
size_t suggested_size) {
char* data = static_cast<char*>(malloc(suggested_size));
if (data == NULL && suggested_size > 0) {
FatalError("node::StreamWrapCallbacks::DoAlloc(uv_handle_t*, size_t)",
"Out Of Memory");
}
return uv_buf_init(data, suggested_size);
}
void StreamWrapCallbacks::DoRead(uv_stream_t* handle,
ssize_t nread,
uv_buf_t buf,
uv_handle_type pending) {
HandleScope scope(node_isolate);
if (nread < 0) {
if (buf.base != NULL)
free(buf.base);
SetErrno(uv_last_error(uv_default_loop()));
MakeCallback(Self(), onread_sym, 0, NULL);
return;
}
if (nread == 0) {
if (buf.base != NULL)
free(buf.base);
return;
}
buf.base = static_cast<char*>(realloc(buf.base, nread));
assert(static_cast<size_t>(nread) <= buf.len);
int argc = 1;
Local<Value> argv[2] = {
Buffer::Use(buf.base, nread)
};
Local<Object> pending_obj;
if (pending == UV_TCP) {
pending_obj = AcceptHandle<TCPWrap, uv_tcp_t>(handle);
} else if (pending == UV_NAMED_PIPE) {
pending_obj = AcceptHandle<PipeWrap, uv_pipe_t>(handle);
} else if (pending == UV_UDP) {
pending_obj = AcceptHandle<UDPWrap, uv_udp_t>(handle);
} else {
assert(pending == UV_UNKNOWN_HANDLE);
}
if (!pending_obj.IsEmpty()) {
argv[1] = pending_obj;
argc++;
}
MakeCallback(wrap_->object(), onread_sym, argc, argv);
}
int StreamWrapCallbacks::DoShutdown(ShutdownWrap* req_wrap, uv_shutdown_cb cb) {
return uv_shutdown(&req_wrap->req_, wrap_->stream_, cb);
}
Handle<Object> StreamWrapCallbacks::Self() {
return wrap_->object();
}
}
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