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work in progress. adding TcpServer

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hyung-hwan
2018-06-25 10:47:27 +00:00
parent 70c787de9f
commit 26e27e78cd
12 changed files with 630 additions and 11 deletions
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2
qse/lib/cmn/assert.c
View File

@ -55,7 +55,7 @@
# include "syscall.h"
#endif
void qse_assert_failed (
void QSE_ASSERT_failed (
const qse_char_t* expr, const qse_char_t* desc,
const qse_char_t* file, qse_size_t line)
{

1
qse/lib/si/Makefile.am
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@ -55,6 +55,7 @@ libqsesixx_la_SOURCES = \
AppRoot.cpp \
SocketAddress.cpp \
Socket.cpp \
TcpServer.cpp \
Thread.cpp
libqsesixx_la_LDFLAGS = -L. -L../cmn -version-info 1:0:0 -no-undefined
libqsesixx_la_LIBADD = -lqsecmnxx -lqsecmn

8
qse/lib/si/Makefile.in
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@ -162,9 +162,10 @@ libqsesi_la_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
$(CFLAGS) $(libqsesi_la_LDFLAGS) $(LDFLAGS) -o $@
libqsesixx_la_DEPENDENCIES =
am__libqsesixx_la_SOURCES_DIST = AppRoot.cpp SocketAddress.cpp \
Socket.cpp Thread.cpp
Socket.cpp TcpServer.cpp Thread.cpp
@ENABLE_CXX_TRUE@am_libqsesixx_la_OBJECTS = AppRoot.lo \
@ENABLE_CXX_TRUE@ SocketAddress.lo Socket.lo Thread.lo
@ENABLE_CXX_TRUE@ SocketAddress.lo Socket.lo TcpServer.lo \
@ENABLE_CXX_TRUE@ Thread.lo
libqsesixx_la_OBJECTS = $(am_libqsesixx_la_OBJECTS)
libqsesixx_la_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CXX \
$(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=link $(CXXLD) \
@ -423,7 +424,6 @@ pdfdir = @pdfdir@
prefix = @prefix@
program_transform_name = @program_transform_name@
psdir = @psdir@
runstatedir = @runstatedir@
sbindir = @sbindir@
sharedstatedir = @sharedstatedir@
srcdir = @srcdir@
@ -487,6 +487,7 @@ libqsesi_la_LIBADD = -lqsecmn $(PTHREAD_LIBS) $(SSL_LIBS)
@ENABLE_CXX_TRUE@ AppRoot.cpp \
@ENABLE_CXX_TRUE@ SocketAddress.cpp \
@ENABLE_CXX_TRUE@ Socket.cpp \
@ENABLE_CXX_TRUE@ TcpServer.cpp \
@ENABLE_CXX_TRUE@ Thread.cpp
@ENABLE_CXX_TRUE@libqsesixx_la_LDFLAGS = -L. -L../cmn -version-info 1:0:0 -no-undefined
@ -575,6 +576,7 @@ distclean-compile:
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/AppRoot.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/Socket.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/SocketAddress.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/TcpServer.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/Thread.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libqsesi_la-aio-pro.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libqsesi_la-aio-sck.Plo@am__quote@

30
qse/lib/si/Socket.cpp
View File

@ -126,6 +126,36 @@ void Socket::close () QSE_CPP_NOEXCEPT
}
}
int Socket::shutdown (int how) QSE_CPP_NOEXCEPT
{
QSE_ASSERT (this->handle != QSE_INVALID_SCKHND);
if (::shutdown(this->handle, how) == -1)
{
this->setErrorCode (syserr_to_errnum(errno));
return -1;
}
return 0;
}
int Socket::getOption (int level, int optname, void* optval, qse_sck_len_t* optlen) QSE_CPP_NOEXCEPT
{
QSE_ASSERT (this->handle != QSE_INVALID_SCKHND);
int n = ::getsockopt (this->handle, level, optname, (char*)optval, optlen);
if (n == -1) this->setErrorCode (syserr_to_errnum(errno));
return n;
}
int Socket::setOption (int level, int optname, const void* optval, qse_sck_len_t optlen) QSE_CPP_NOEXCEPT
{
QSE_ASSERT (this->handle != QSE_INVALID_SCKHND);
int n = ::setsockopt (this->handle, level, optname, (const char*)optval, optlen);
if (n == -1) this->setErrorCode (syserr_to_errnum(errno));
return n;
}
int Socket::connect (const SocketAddress& target) QSE_CPP_NOEXCEPT
{
QSE_ASSERT (this->handle != QSE_INVALID_SCKHND);

327
qse/lib/si/TcpServer.cpp Normal file
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@ -0,0 +1,327 @@
/*
* $Id$
*
Copyright (c) 2006-2014 Chung, Hyung-Hwan. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EQSERESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <qse/si/TcpServer.hpp>
QSE_BEGIN_NAMESPACE(QSE)
TcpServer::Client::Client (TcpServer* server)
{
this->server = server;
}
//
// NOTICE: the guarantee class below could have been placed
// inside TCPServer::Client::run () without supporting
// old C++ compilers.
//
class guarantee_tcpsocket_close {
public:
guarantee_tcpsocket_close (Socket* socket): psck (socket) {}
~guarantee_tcpsocket_close () { psck->shutdown (); psck->close (); }
Socket* psck;
};
int TcpServer::Client::run ()
{
// blockAllSignals is called inside run because
// Client is instantiated in the TcpServer thread.
// so if it is called in the constructor of Client,
// it would just block signals to the TcpProxy thread.
blockAllSignals (); // don't care about the result.
guarantee_tcpsocket_close close_socket (&socket);
if (server->handle_client (&socket, &address) == -1) return -1;
return 0;
}
int TcpServer::Client::stop () QSE_CPP_NOEXCEPT
{
// the receiver will be notified of the end of
// the connection by the socket's closing.
// therefore, handle_client() must return
// when it detects the end of the connection.
//
// TODO: must think of a better way to do this
// as it might not be thread-safe.
// but it is still ok because Client::stop()
// is rarely called.
socket.shutdown ();
socket.close ();
return 0;
}
TcpServer::TcpServer ():
stop_requested(false),
server_serving(false),
max_connections(0),
thread_stack_size (0),
reopen_socket_upon_error(false)
{
}
TcpServer::TcpServer (const SocketAddress& address):
binding_address(address),
stop_requested(false),
server_serving(false),
max_connections(0),
thread_stack_size (0),
reopen_socket_upon_error(false)
{
}
TcpServer::~TcpServer ()
{
// QSE_ASSERT (server_serving == false);
this->delete_all_clients ();
}
int TcpServer::start (int* err_code)
{
return this->start(true, err_code);
}
int TcpServer::open_tcp_socket (Socket& socket, bool winsock_inheritable, int* err_code)
{
if (socket.open(QSE_AF_INET6, QSE_SOCK_STREAM, 0) <= -1)
{
if (err_code) *err_code = ERR_OPEN;
return -1;
}
#ifdef _WIN32
if (winsock_inheritable)
{
SetHandleInformation (
(HANDLE)socket.handle(),
HANDLE_FLAG_INHERIT,
HANDLE_FLAG_INHERIT);
}
else
{
SetHandleInformation (
(HANDLE)socket.handle(),
HANDLE_FLAG_INHERIT, 0);
}
#endif
socket.setReuseAddr (true);
//socket.setReusePort (true);
if (socket.bind(this->binding_address) <= -1)
{
if (err_code) *err_code = ERR_BIND;
return -1;
}
if (socket.listen() <= -1)
{
if (err_code) *err_code = ERR_LISTEN;
return -1;
}
socket.enableTimeout (1000);
return 0;
}
int TcpServer::start (bool winsock_inheritable, int* err_code)
{
this->server_serving = true;
if (err_code != QSE_NULL) *err_code = ERR_NONE;
this->setStopRequested (false);
Client* client = QSE_NULL;
try
{
Socket socket;
if (this->open_tcp_socket(socket, winsock_inheritable, err_code) <= -1)
{
this->server_serving = false;
this->setStopRequested (false);
return -1;
}
while (!this->isStopRequested())
{
this->delete_dead_clients ();
if (this->max_connections > 0 && this->max_connections <= this->client_list.getSize())
{
Socket s;
SocketAddress sa;
if (socket.accept(&s, &sa, Socket::T_CLOEXEC) >= 0) s.close();
continue;
}
if (client == QSE_NULL)
{
// allocating the client object before accept is
// a bit awkward. but socket.accept() can be passed
// the socket field inside the client object.
try { client = new Client (this); }
catch (...) { }
}
if (client == QSE_NULL)
{
// memory alloc failed
Socket s;
SocketAddress sa;
if (socket.accept(&s, &sa, Socket::T_CLOEXEC) >= 0) s.close();
continue;
}
if (socket.accept(&client->socket, &client->address, Socket::T_CLOEXEC) <= -1)
{
// can't do much if accept fails
// don't "delete client" here as i want it to be reused
// in the next iteration after "continue"
if (this->reopen_socket_upon_error)
{
// closing the listeing socket causes the
// the pending connection to be dropped.
// this poses the risk of reopening failure.
// imagine the case of EMFILE(too many open files).
// accept() will fail until an open file is closed.
qse_size_t reopen_count = 0;
socket.close ();
reopen:
if (this->open_tcp_socket (socket, winsock_inheritable, err_code) <= -1)
{
if (reopen_count >= 200) qse_sleep (100);
else if (reopen_count >= 100) qse_sleep (10);
if (this->isStopRequested()) break;
reopen_count++;
goto reopen;
}
}
continue;
}
client->setStackSize (thread_stack_size);
#ifdef _WIN32
if (client->start(Thread::DETACHED) == -1)
#else
if (client->start(0) == -1)
#endif
{
delete client;
client = QSE_NULL;
continue;
}
this->client_list.append (client);
client = QSE_NULL;
}
this->delete_all_clients ();
if (client != QSE_NULL) delete client;
}
catch (...)
{
this->delete_all_clients ();
if (client != QSE_NULL) delete client;
if (err_code) *err_code = ERR_EXCEPTION;
this->server_serving = false;
this->setStopRequested (false);
return -1;
}
this->server_serving = false;
this->setStopRequested (false);
return 0;
}
int TcpServer::stop ()
{
if (server_serving) setStopRequested (true);
return 0;
}
void TcpServer::delete_dead_clients ()
{
ClientList::Node* np, * np2;
np = client_list.getHeadNode();
while (np)
{
Client* p = np->value;
QSE_ASSERT (p != QSE_NULL);
if (p->getState() != Thread::RUNNING)
{
#ifndef _WIN32
p->join ();
#endif
delete p;
np2 = np; np = np->getNextNode();
client_list.remove (np2);
continue;
}
np = np->getNextNode();
}
}
void TcpServer::delete_all_clients ()
{
ClientList::Node* np, * np2;
Client* p;
for (np = client_list.getHeadNode(); np; np = np->getNextNode())
{
p = np->value;
if (p->getState() == Thread::RUNNING) p->stop();
}
np = client_list.getHeadNode();
while (np != QSE_NULL)
{
p = np->value;
QSE_ASSERT (p != QSE_NULL);
#ifdef _WIN32
while (p->state() == Thread::RUNNING) qse_sleep (300);
#else
p->join ();
#endif
delete p;
np2 = np; np = np->getNextNode();
client_list.remove (np2);
}
}
QSE_END_NAMESPACE(QSE)