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// Copyright 2009 Ryan Dahl <ry@tinyclouds.org>
#include <net.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <arpa/inet.h> /* inet_ntop */
#include <netinet/in.h> /* sockaddr_in, sockaddr_in6 */
using namespace v8;
namespace node {
#define UTF8_SYMBOL String::NewSymbol("utf8")
#define RAW_SYMBOL String::NewSymbol("raw")
#define RAWS_SYMBOL String::NewSymbol("raws")
#define ASCII_SYMBOL String::NewSymbol("ascii")
#define SERVER_SYMBOL String::NewSymbol("server")
#define REMOTE_ADDRESS_SYMBOL String::NewSymbol("remoteAddress")
#define READY_STATE_SYMBOL String::NewSymbol("readyState")
#define OPEN_SYMBOL String::NewSymbol("open")
#define OPENING_SYMBOL String::NewSymbol("opening")
#define READ_ONLY_SYMBOL String::NewSymbol("readOnly")
#define WRITE_ONLY_SYMBOL String::NewSymbol("writeOnly")
#define CLOSING_SYMBOL String::NewSymbol("closing")
#define CLOSED_SYMBOL String::NewSymbol("closed")
static const struct addrinfo server_tcp_hints =
/* ai_flags */ { AI_PASSIVE
/* ai_family */ , AF_UNSPEC
/* ai_socktype */ , SOCK_STREAM
, 0
};
static const struct addrinfo client_tcp_hints =
/* ai_flags */ { 0
/* ai_family */ , AF_UNSPEC
/* ai_socktype */ , SOCK_STREAM
, 0
};
Persistent<FunctionTemplate> Connection::constructor_template;
void Connection::Initialize(v8::Handle<v8::Object> target) {
HandleScope scope;
Local<FunctionTemplate> t = FunctionTemplate::New(New);
constructor_template = Persistent<FunctionTemplate>::New(t);
constructor_template->Inherit(EventEmitter::constructor_template);
constructor_template->InstanceTemplate()->SetInternalFieldCount(1);
NODE_SET_PROTOTYPE_METHOD(constructor_template, "connect", Connect);
NODE_SET_PROTOTYPE_METHOD(constructor_template, "send", Send);
NODE_SET_PROTOTYPE_METHOD(constructor_template, "close", Close);
NODE_SET_PROTOTYPE_METHOD(constructor_template, "forceClose", ForceClose);
NODE_SET_PROTOTYPE_METHOD(constructor_template, "setEncoding", SetEncoding);
NODE_SET_PROTOTYPE_METHOD(constructor_template, "readPause", ReadPause);
NODE_SET_PROTOTYPE_METHOD(constructor_template, "readResume", ReadResume);
NODE_SET_PROTOTYPE_METHOD(constructor_template, "setTimeout", SetTimeout);
constructor_template->PrototypeTemplate()->SetAccessor(
READY_STATE_SYMBOL,
ReadyStateGetter);
target->Set(String::NewSymbol("Connection"),
constructor_template->GetFunction());
}
Handle<Value> Connection::ReadyStateGetter(Local<String> property,
const AccessorInfo& info) {
Connection *connection = ObjectWrap::Unwrap<Connection>(info.This());
assert(connection);
HandleScope scope;
assert(property == READY_STATE_SYMBOL);
if (connection->resolving_) return scope.Close(OPENING_SYMBOL);
switch (evcom_stream_state(&connection->stream_)) {
case EVCOM_INITIALIZED: return scope.Close(CLOSED_SYMBOL);
case EVCOM_CONNECTING: return scope.Close(OPENING_SYMBOL);
case EVCOM_CONNECTED_RW: return scope.Close(OPEN_SYMBOL);
case EVCOM_CONNECTED_RO: return scope.Close(READ_ONLY_SYMBOL);
case EVCOM_CONNECTED_WO: return scope.Close(WRITE_ONLY_SYMBOL);
case EVCOM_CLOSING: return scope.Close(CLOSING_SYMBOL);
case EVCOM_CLOSED: return scope.Close(CLOSED_SYMBOL);
}
assert(0 && "This shouldnt happen");
return ThrowException(Exception::Error(
String::New("This shouldn't happen.")));
}
void Connection::Init() {
resolving_ = false;
evcom_stream_init(&stream_);
stream_.on_connect = Connection::on_connect;
stream_.on_read = Connection::on_read;
stream_.on_close = Connection::on_close;
stream_.on_timeout = Connection::on_timeout;
stream_.data = this;
}
Connection::~Connection() {
assert(stream_.recvfd < 0 && "garbage collecting open Connection");
assert(stream_.sendfd < 0 && "garbage collecting open Connection");
}
Handle<Value> Connection::New(const Arguments& args) {
HandleScope scope;
Connection *connection = new Connection();
connection->Wrap(args.This());
return args.This();
}
Handle<Value> Connection::Connect(const Arguments& args) {
Connection *connection = ObjectWrap::Unwrap<Connection>(args.Holder());
assert(connection);
HandleScope scope;
if (connection->ReadyState() == EVCOM_CLOSED) {
connection->Init(); // in case we're reusing the socket
assert(connection->ReadyState() == EVCOM_INITIALIZED);
}
if (connection->ReadyState() != EVCOM_INITIALIZED) {
Local<Value> exception = Exception::Error(
String::New("Socket is not in CLOSED state."));
return ThrowException(exception);
}
assert(connection->stream_.recvfd < 0);
assert(connection->stream_.sendfd < 0);
if (args.Length() == 0) {
Local<Value> exception = Exception::TypeError(
String::New("First argument must be a port number"));
return ThrowException(exception);
}
String::AsciiValue port_sv(args[0]->ToString());
assert(connection->port_ == NULL);
connection->port_ = strdup(*port_sv);
assert(connection->host_ == NULL);
if (args.Length() > 1 && args[1]->IsString()) {
String::Utf8Value host_sv(args[1]->ToString());
connection->host_ = strdup(*host_sv);
}
connection->resolving_ = true;
ev_ref(EV_DEFAULT_UC);
connection->Attach();
/* For the moment I will do DNS lookups in the eio thread pool. This is
* sub-optimal and cannot handle massive numbers of requests.
* In the future I will move to a system using adns or udns:
* http://lists.schmorp.de/pipermail/libev/2009q1/000632.html
*/
eio_custom(Connection::Resolve, EIO_PRI_DEFAULT, Connection::AfterResolve,
connection);
return Undefined();
}
int Connection::Resolve(eio_req *req) {
Connection *connection = static_cast<Connection*> (req->data);
struct addrinfo *address = NULL;
assert(connection->attached_);
assert(connection->resolving_);
req->result = getaddrinfo(connection->host_, connection->port_,
&client_tcp_hints, &address);
req->ptr2 = address;
free(connection->host_);
connection->host_ = NULL;
free(connection->port_);
connection->port_ = NULL;
return 0;
}
static struct addrinfo * AddressDefaultToIPv4(struct addrinfo *address_list) {
struct addrinfo *address = NULL;
for (address = address_list; address != NULL; address = address->ai_next) {
if (address->ai_addr->sa_family == AF_INET) break;
}
return address == NULL ? address_list : address;
}
int Connection::AfterResolve(eio_req *req) {
ev_unref(EV_DEFAULT_UC);
Connection *connection = static_cast<Connection*> (req->data);
assert(connection->resolving_);
assert(connection->attached_);
struct addrinfo *address = NULL,
*address_list = static_cast<struct addrinfo *>(req->ptr2);
address = AddressDefaultToIPv4(address_list);
connection->resolving_ = false;
int r = 0;
if (req->result == 0) r = connection->Connect(address->ai_addr);
if (address_list) freeaddrinfo(address_list);
// no error. return.
if (req->result == 0) {
evcom_stream_attach(EV_DEFAULT_UC_ &connection->stream_);
goto out;
}
/* RESOLVE ERROR */
/* TODO: the whole resolve process should be moved into evcom_stream.
* The fact that I'm modifying a read-only variable here should be
* good evidence of this.
*/
connection->stream_.errorno = req->result;
connection->OnClose();
connection->Detach();
out:
return 0;
}
Handle<Value> Connection::SetEncoding(const Arguments& args) {
HandleScope scope;
Connection *connection = ObjectWrap::Unwrap<Connection>(args.This());
assert(connection);
if (!args[0]->IsString()) {
connection->encoding_ = RAW;
return scope.Close(RAW_SYMBOL);
}
switch (ParseEncoding(args[0])) {
case ASCII:
connection->encoding_ = ASCII;
return scope.Close(ASCII_SYMBOL);
case UTF8:
connection->encoding_ = UTF8;
return scope.Close(UTF8_SYMBOL);
case RAW:
connection->encoding_ = RAW;
return scope.Close(RAW_SYMBOL);
case RAWS:
connection->encoding_ = RAWS;
return scope.Close(RAWS_SYMBOL);
}
assert(0 && "this shouldn't happen");
return ThrowException(Exception::Error(
String::New("Could not parse encoding. This is a Node bug.")));
}
Handle<Value> Connection::ReadPause(const Arguments& args) {
HandleScope scope;
Connection *connection = ObjectWrap::Unwrap<Connection>(args.This());
assert(connection);
connection->ReadPause();
return Undefined();
}
Handle<Value> Connection::ReadResume(const Arguments& args) {
HandleScope scope;
Connection *connection = ObjectWrap::Unwrap<Connection>(args.This());
assert(connection);
connection->ReadResume();
return Undefined();
}
Handle<Value> Connection::SetTimeout(const Arguments& args) {
HandleScope scope;
Connection *connection = ObjectWrap::Unwrap<Connection>(args.This());
assert(connection);
float timeout = NODE_V8_UNIXTIME(args[0]);
connection->SetTimeout(timeout);
return Undefined();
}
Handle<Value> Connection::Close(const Arguments& args) {
HandleScope scope;
Connection *connection = ObjectWrap::Unwrap<Connection>(args.Holder());
assert(connection);
connection->Close();
return Undefined();
}
Handle<Value> Connection::ForceClose(const Arguments& args) {
HandleScope scope;
Connection *connection = ObjectWrap::Unwrap<Connection>(args.Holder());
assert(connection);
connection->ForceClose();
connection->Detach();
return Undefined();
}
Handle<Value> Connection::Send(const Arguments& args) {
HandleScope scope;
Connection *connection = ObjectWrap::Unwrap<Connection>(args.Holder());
assert(connection);
if (connection->ReadyState() != EVCOM_CONNECTED_RW &&
connection->ReadyState() != EVCOM_CONNECTED_WO) {
Local<Value> exception = Exception::Error(
String::New("Socket is not open for writing"));
return ThrowException(exception);
}
enum encoding enc = ParseEncoding(args[1]);
ssize_t len = DecodeBytes(args[0], enc);
if (len < 0) {
Local<Value> exception = Exception::TypeError(String::New("Bad argument"));
return ThrowException(exception);
}
char * buf = new char[len];
ssize_t written = DecodeWrite(buf, len, args[0], enc);
assert(written == len);
connection->Send(buf, written);
delete buf;
return scope.Close(Integer::New(written));
}
void Connection::OnReceive(const void *buf, size_t len) {
HandleScope scope;
Local<Value> data = Encode(buf, len, encoding_);
Emit("receive", 1, &data);
}
void Connection::OnClose() {
HandleScope scope;
Handle<Value> argv[1];
argv[0] = stream_.errorno == 0 ? False() : True();
Emit("close", 1, argv);
}
#define DEFINE_SIMPLE_CALLBACK(name, type) \
void name() \
{ \
HandleScope scope; \
Emit(type, 0, NULL); \
}
DEFINE_SIMPLE_CALLBACK(Connection::OnConnect, "connect")
DEFINE_SIMPLE_CALLBACK(Connection::OnTimeout, "timeout")
DEFINE_SIMPLE_CALLBACK(Connection::OnEOF, "eof")
Persistent<FunctionTemplate> Server::constructor_template;
void Server::Initialize(Handle<Object> target) {
HandleScope scope;
Local<FunctionTemplate> t = FunctionTemplate::New(New);
constructor_template = Persistent<FunctionTemplate>::New(t);
constructor_template->Inherit(EventEmitter::constructor_template);
constructor_template->InstanceTemplate()->SetInternalFieldCount(1);
NODE_SET_PROTOTYPE_METHOD(constructor_template, "listen", Listen);
NODE_SET_PROTOTYPE_METHOD(constructor_template, "close", Close);
target->Set(String::NewSymbol("Server"), constructor_template->GetFunction());
}
static Local<String> GetAddressString(struct sockaddr *addr) {
HandleScope scope;
char ip[INET6_ADDRSTRLEN];
Local<String> remote_address;
if (addr->sa_family == AF_INET) {
struct sockaddr_in *sa = reinterpret_cast<struct sockaddr_in*>(addr);
inet_ntop(AF_INET, &(sa->sin_addr), ip, INET6_ADDRSTRLEN);
remote_address = String::New(ip);
} else if (addr->sa_family == AF_INET6) {
struct sockaddr_in6 *sa6 = reinterpret_cast<struct sockaddr_in6*>(addr);
inet_ntop(AF_INET6, &(sa6->sin6_addr), ip, INET6_ADDRSTRLEN);
remote_address = String::New(ip);
} else {
assert(0 && "received a bad sa_family");
}
return scope.Close(remote_address);
}
Handle<FunctionTemplate> Server::GetConnectionTemplate() {
return Connection::constructor_template;
}
Connection* Server::UnwrapConnection(Local<Object> connection) {
HandleScope scope;
return ObjectWrap::Unwrap<Connection>(connection);
}
Connection* Server::OnConnection(struct sockaddr *addr) {
HandleScope scope;
TryCatch try_catch;
Local<Object> js_connection =
GetConnectionTemplate()->GetFunction()->NewInstance(0, NULL);
if (js_connection.IsEmpty()) {
FatalException(try_catch);
return NULL;
}
Local<String> remote_address = GetAddressString(addr);
js_connection->Set(REMOTE_ADDRESS_SYMBOL, remote_address);
js_connection->Set(SERVER_SYMBOL, handle_);
Connection *connection = UnwrapConnection(js_connection);
if (!connection) return NULL;
Handle<Value> argv[1] = { js_connection };
Emit("connection", 1, argv);
connection->Attach();
return connection;
}
void Server::OnClose(int errorno) {
HandleScope scope;
Handle<Value> argv[1] = { Integer::New(errorno) };
Emit("close", 1, argv);
}
Handle<Value> Server::New(const Arguments& args) {
HandleScope scope;
Server *server = new Server();
server->Wrap(args.This());
return args.This();
}
Handle<Value> Server::Listen(const Arguments& args) {
Server *server = ObjectWrap::Unwrap<Server>(args.Holder());
assert(server);
HandleScope scope;
if (args.Length() == 0) {
Local<Value> exception = Exception::TypeError(
String::New("First argument must be a port number"));
return ThrowException(exception);
}
String::AsciiValue port(args[0]->ToString());
#ifndef DNS_MAXNAME
# define DNS_MAXNAME 1024
#endif
char host[DNS_MAXNAME+1] = "\0";
int backlog = 1024;
if (args.Length() == 2) {
if (args[1]->IsInt32()) {
backlog = args[1]->Int32Value();
} else if (args[1]->IsString()) {
args[1]->ToString()->WriteAscii(host, 0, DNS_MAXNAME+1);
}
} else if (args.Length() > 2) {
if (args[1]->IsString()) {
args[1]->ToString()->WriteAscii(host, 0, DNS_MAXNAME+1);
}
if (!args[2]->IsInt32()) {
return ThrowException(
Exception::TypeError(String::New("backlog must be an integer")));
}
backlog = args[2]->Int32Value();
}
// For servers call getaddrinfo inline. This is blocking but it shouldn't
// matter much. If someone actually complains then simply swap it out
// with a libeio call.
struct addrinfo * address = NULL,
* address_list = NULL;
int r = getaddrinfo(strlen(host) ?
host : NULL, *port, &server_tcp_hints, &address_list);
if (r != 0) {
Local<Value> exception = Exception::Error(String::New(strerror(errno)));
return ThrowException(exception);
}
address = AddressDefaultToIPv4(address_list);
server->Listen(address->ai_addr, backlog);
if (address_list) freeaddrinfo(address_list);
return Undefined();
}
Handle<Value> Server::Close(const Arguments& args) {
Server *server = ObjectWrap::Unwrap<Server>(args.Holder());
assert(server);
server->Close();
return Undefined();
}
} // namespace node