1 /* This file is part of Metaproxy.
2 Copyright (C) 2005-2011 Index Data
4 Metaproxy is free software; you can redistribute it and/or modify it under
5 the terms of the GNU General Public License as published by the Free
6 Software Foundation; either version 2, or (at your option) any later
9 Metaproxy is distributed in the hope that it will be useful, but WITHOUT ANY
10 WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #include <metaproxy/util.hpp>
23 #include <metaproxy/filter.hpp>
24 #include <metaproxy/package.hpp>
25 #include "thread_pool_observer.hpp"
26 #include "filter_frontend_net.hpp"
27 #include <yazpp/z-assoc.h>
28 #include <yazpp/pdu-assoc.h>
29 #include <yazpp/socket-manager.h>
30 #include <yazpp/limit-connect.h>
35 namespace mp = metaproxy_1;
37 namespace metaproxy_1 {
38 class My_Timer_Thread;
41 class FrontendNet::Rep {
42 friend class FrontendNet;
44 std::vector<std::string> m_ports;
45 int m_listen_duration;
46 int m_session_timeout;
48 yazpp_1::SocketManager mySocketManager;
52 class My_Timer_Thread : public yazpp_1::ISocketObserver {
54 yazpp_1::ISocketObservable *m_obs;
58 My_Timer_Thread(yazpp_1::ISocketObservable *obs, int duration);
59 void socketNotify(int event);
62 class ZAssocChild : public yazpp_1::Z_Assoc {
65 ZAssocChild(yazpp_1::IPDU_Observable *the_PDU_Observable,
66 mp::ThreadPoolSocketObserver *m_thread_pool_observer,
67 const mp::Package *package);
70 yazpp_1::IPDU_Observer* sessionNotify(
71 yazpp_1::IPDU_Observable *the_PDU_Observable,
73 void recv_GDU(Z_GDU *apdu, int len);
79 mp::ThreadPoolSocketObserver *m_thread_pool_observer;
80 mp::Session m_session;
83 const mp::Package *m_package;
85 class ThreadPoolPackage : public mp::IThreadPoolMsg {
87 ThreadPoolPackage(mp::Package *package, mp::ZAssocChild *ses) :
88 m_assoc_child(ses), m_package(package) { };
90 IThreadPoolMsg *handle();
94 mp::ZAssocChild *m_assoc_child;
95 mp::Package *m_package;
98 class ZAssocServer : public yazpp_1::Z_Assoc {
101 ZAssocServer(yazpp_1::IPDU_Observable *PDU_Observable, int timeout,
103 void set_package(const mp::Package *package);
104 void set_thread_pool(ThreadPoolSocketObserver *m_thread_pool_observer);
106 yazpp_1::IPDU_Observer* sessionNotify(
107 yazpp_1::IPDU_Observable *the_PDU_Observable,
109 void recv_GDU(Z_GDU *apdu, int len);
112 void timeoutNotify();
113 void connectNotify();
115 mp::ThreadPoolSocketObserver *m_thread_pool_observer;
116 const mp::Package *m_package;
117 int m_session_timeout;
119 yazpp_1::LimitConnect limit_connect;
123 mp::ThreadPoolPackage::~ThreadPoolPackage()
128 void mp::ThreadPoolPackage::result()
130 m_assoc_child->m_no_requests--;
132 yazpp_1::GDU *gdu = &m_package->response();
137 m_assoc_child->send_GDU(gdu->get(), &len);
139 else if (!m_package->session().is_closed())
141 // no response package and yet the session is still open..
142 // means that request is unhandled..
143 yazpp_1::GDU *gdu_req = &m_package->request();
144 Z_GDU *z_gdu = gdu_req->get();
145 if (z_gdu && z_gdu->which == Z_GDU_Z3950)
147 // For Z39.50, response with a Close and shutdown
150 Z_APDU *apdu_response = odr.create_close(
151 z_gdu->u.z3950, Z_Close_systemProblem,
152 "unhandled Z39.50 request");
154 m_assoc_child->send_Z_PDU(apdu_response, &len);
156 else if (z_gdu && z_gdu->which == Z_GDU_HTTP_Request)
158 // For HTTP, respond with Server Error
162 = odr.create_HTTP_Response(m_package->session(),
163 z_gdu->u.HTTP_Request, 500);
164 m_assoc_child->send_GDU(zgdu_res, &len);
166 m_package->session().close();
169 if (m_assoc_child->m_no_requests == 0 && m_package->session().is_closed())
171 m_assoc_child->close();
176 mp::IThreadPoolMsg *mp::ThreadPoolPackage::handle()
183 mp::ZAssocChild::ZAssocChild(yazpp_1::IPDU_Observable *PDU_Observable,
184 mp::ThreadPoolSocketObserver *my_thread_pool,
185 const mp::Package *package)
186 : Z_Assoc(PDU_Observable)
188 m_thread_pool_observer = my_thread_pool;
190 m_delete_flag = false;
192 const char *peername = PDU_Observable->getpeername();
194 peername = "unknown";
195 m_origin.set_tcpip_address(std::string(peername), m_session.id());
199 yazpp_1::IPDU_Observer *mp::ZAssocChild::sessionNotify(yazpp_1::IPDU_Observable
200 *the_PDU_Observable, int fd)
205 mp::ZAssocChild::~ZAssocChild()
209 void mp::ZAssocChild::recv_GDU(Z_GDU *z_pdu, int len)
213 mp::Package *p = new mp::Package(m_session, m_origin);
215 mp::ThreadPoolPackage *tp = new mp::ThreadPoolPackage(p, this);
216 p->copy_filter(*m_package);
217 p->request() = yazpp_1::GDU(z_pdu);
218 m_thread_pool_observer->put(tp);
221 void mp::ZAssocChild::failNotify()
223 // TODO: send Package to signal "close"
224 if (m_session.is_closed())
226 if (m_no_requests == 0)
234 mp::Package *p = new mp::Package(m_session, m_origin);
236 mp::ThreadPoolPackage *tp = new mp::ThreadPoolPackage(p, this);
237 p->copy_filter(*m_package);
238 m_thread_pool_observer->put(tp);
241 void mp::ZAssocChild::timeoutNotify()
246 void mp::ZAssocChild::connectNotify()
251 mp::ZAssocServer::ZAssocServer(yazpp_1::IPDU_Observable *PDU_Observable,
252 int timeout, int connect_max)
253 : Z_Assoc(PDU_Observable), m_session_timeout(timeout),
254 m_connect_max(connect_max)
260 void mp::ZAssocServer::set_package(const mp::Package *package)
265 void mp::ZAssocServer::set_thread_pool(ThreadPoolSocketObserver *observer)
267 m_thread_pool_observer = observer;
270 yazpp_1::IPDU_Observer *mp::ZAssocServer::sessionNotify(yazpp_1::IPDU_Observable
271 *the_PDU_Observable, int fd)
274 const char *peername = the_PDU_Observable->getpeername();
277 limit_connect.add_connect(peername);
278 limit_connect.cleanup(false);
279 int con_sz = limit_connect.get_total(peername);
280 if (m_connect_max && con_sz > m_connect_max)
283 mp::ZAssocChild *my =
284 new mp::ZAssocChild(the_PDU_Observable, m_thread_pool_observer,
286 my->timeout(m_session_timeout);
290 mp::ZAssocServer::~ZAssocServer()
294 void mp::ZAssocServer::recv_GDU(Z_GDU *apdu, int len)
298 void mp::ZAssocServer::failNotify()
302 void mp::ZAssocServer::timeoutNotify()
306 void mp::ZAssocServer::connectNotify()
310 mp::filter::FrontendNet::FrontendNet() : m_p(new Rep)
312 m_p->m_no_threads = 5;
313 m_p->m_listen_duration = 0;
314 m_p->m_session_timeout = 300; // 5 minutes
315 m_p->m_connect_max = 0;
319 mp::filter::FrontendNet::~FrontendNet()
324 for (i = 0; i<m_p->m_ports.size(); i++)
330 bool mp::My_Timer_Thread::timeout()
335 mp::My_Timer_Thread::My_Timer_Thread(yazpp_1::ISocketObservable *obs,
337 m_obs(obs), m_pipe(9123), m_timeout(false)
339 obs->addObserver(m_pipe.read_fd(), this);
340 obs->maskObserver(this, yazpp_1::SOCKET_OBSERVE_READ);
341 obs->timeoutObserver(this, duration);
344 void mp::My_Timer_Thread::socketNotify(int event)
347 m_obs->deleteObserver(this);
350 void mp::filter::FrontendNet::process(Package &package) const
355 My_Timer_Thread *tt = 0;
357 if (m_p->m_listen_duration)
358 tt = new My_Timer_Thread(&m_p->mySocketManager,
359 m_p->m_listen_duration);
361 ThreadPoolSocketObserver tp(&m_p->mySocketManager, m_p->m_no_threads);
363 for (i = 0; i<m_p->m_ports.size(); i++)
365 m_p->az[i]->set_package(&package);
366 m_p->az[i]->set_thread_pool(&tp);
368 while (m_p->mySocketManager.processEvent() > 0)
370 if (tt && tt->timeout())
376 void mp::filter::FrontendNet::configure(const xmlNode * ptr, bool test_only)
378 if (!ptr || !ptr->children)
380 throw mp::filter::FilterException("No ports for Frontend");
382 std::vector<std::string> ports;
383 for (ptr = ptr->children; ptr; ptr = ptr->next)
385 if (ptr->type != XML_ELEMENT_NODE)
387 if (!strcmp((const char *) ptr->name, "port"))
389 std::string port = mp::xml::get_text(ptr);
390 ports.push_back(port);
393 else if (!strcmp((const char *) ptr->name, "threads"))
395 std::string threads_str = mp::xml::get_text(ptr);
396 int threads = atoi(threads_str.c_str());
398 throw mp::filter::FilterException("Bad value for threads: "
400 m_p->m_no_threads = threads;
402 else if (!strcmp((const char *) ptr->name, "timeout"))
404 std::string timeout_str = mp::xml::get_text(ptr);
405 int timeout = atoi(timeout_str.c_str());
407 throw mp::filter::FilterException("Bad value for timeout: "
409 m_p->m_session_timeout = timeout;
411 else if (!strcmp((const char *) ptr->name, "connect-max"))
413 m_p->m_connect_max = mp::xml::get_int(ptr, 0);
417 throw mp::filter::FilterException("Bad element "
418 + std::string((const char *)
427 void mp::filter::FrontendNet::set_ports(std::vector<std::string> &ports)
429 m_p->m_ports = ports;
431 m_p->az = new mp::ZAssocServer *[m_p->m_ports.size()];
433 // Create mp::ZAssocServer for each port
435 for (i = 0; i<m_p->m_ports.size(); i++)
437 // create a PDU assoc object (one per mp::ZAssocServer)
438 yazpp_1::PDU_Assoc *as = new yazpp_1::PDU_Assoc(&m_p->mySocketManager);
440 // create ZAssoc with PDU Assoc
441 m_p->az[i] = new mp::ZAssocServer(as,
442 m_p->m_session_timeout,
444 if (m_p->az[i]->server(m_p->m_ports[i].c_str()))
446 throw mp::filter::FilterException("Unable to bind to address "
447 + std::string(m_p->m_ports[i]));
452 void mp::filter::FrontendNet::set_listen_duration(int d)
454 m_p->m_listen_duration = d;
457 static mp::filter::Base* filter_creator()
459 return new mp::filter::FrontendNet;
463 struct metaproxy_1_filter_struct metaproxy_1_filter_frontend_net = {
473 * c-file-style: "Stroustrup"
474 * indent-tabs-mode: nil
476 * vim: shiftwidth=4 tabstop=8 expandtab