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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2019 Robby <robby@chatbelgie.be>
* Copyright (C) 2018 linuxdaemon <linuxdaemon.irc@gmail.com>
* Copyright (C) 2017-2018, 2020-2021 Sadie Powell <sadie@witchery.services>
* Copyright (C) 2014 JustArchi <JustArchi@JustArchi.net>
* Copyright (C) 2014 Attila Molnar <attilamolnar@hush.com>
* Copyright (C) 2013 Daniel Vassdal <shutter@canternet.org>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
* redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "inspircd.h"
class FlashPDSocket;
namespace
{
insp::intrusive_list<FlashPDSocket> sockets;
std::string policy_reply;
const std::string expected_request("<policy-file-request/>\0", 23);
}
class FlashPDSocket : public BufferedSocket, public Timer, public insp::intrusive_list_node<FlashPDSocket>
{
/** True if this object is in the cull list
*/
bool waitingcull;
bool Tick(time_t currtime) CXX11_OVERRIDE
{
AddToCull();
return false;
}
public:
FlashPDSocket(int newfd, unsigned int timeoutsec)
: BufferedSocket(newfd)
, Timer(timeoutsec)
, waitingcull(false)
{
ServerInstance->Timers.AddTimer(this);
}
~FlashPDSocket()
{
sockets.erase(this);
}
void OnError(BufferedSocketError) CXX11_OVERRIDE
{
AddToCull();
}
void OnDataReady() CXX11_OVERRIDE
{
if (recvq == expected_request)
WriteData(policy_reply);
AddToCull();
}
void AddToCull()
{
if (waitingcull)
return;
waitingcull = true;
Close();
ServerInstance->GlobalCulls.AddItem(this);
}
};
class ModuleFlashPD : public Module
{
unsigned int timeout;
public:
ModResult OnAcceptConnection(int nfd, ListenSocket* from, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server) CXX11_OVERRIDE
{
if (!stdalgo::string::equalsci(from->bind_tag->getString("type"), "flashpolicyd"))
return MOD_RES_PASSTHRU;
if (policy_reply.empty())
return MOD_RES_DENY;
sockets.push_front(new FlashPDSocket(nfd, timeout));
return MOD_RES_ALLOW;
}
void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
{
ConfigTag* tag = ServerInstance->Config->ConfValue("flashpolicyd");
std::string file = tag->getString("file");
if (!file.empty())
{
try
{
FileReader reader(file);
policy_reply = reader.GetString();
}
catch (CoreException&)
{
throw ModuleException("A file was specified for FlashPD, but it could not be loaded at " + tag->getTagLocation());
}
return;
}
// A file was not specified. Set the default setting.
// We allow access to all client ports by default
std::string to_ports;
for (std::vector<ListenSocket*>::const_iterator i = ServerInstance->ports.begin(); i != ServerInstance->ports.end(); ++i)
{
ListenSocket* ls = *i;
if (!stdalgo::string::equalsci(ls->bind_tag->getString("type", "clients", 1), "clients"))
continue;
if (!ls->bind_tag->getString("sslprofile", ls->bind_tag->getString("ssl")).empty())
continue;
to_ports.append(ConvToStr(ls->bind_sa.port())).push_back(',');
}
if (to_ports.empty())
{
policy_reply.clear();
return;
}
to_ports.erase(to_ports.size() - 1);
policy_reply =
"<?xml version=\"1.0\"?>\
<!DOCTYPE cross-domain-policy SYSTEM \"/xml/dtds/cross-domain-policy.dtd\">\
<cross-domain-policy>\
<site-control permitted-cross-domain-policies=\"master-only\"/>\
<allow-access-from domain=\"*\" to-ports=\"" + to_ports + "\" />\
</cross-domain-policy>";
timeout = tag->getDuration("timeout", 5, 1);
}
CullResult cull() CXX11_OVERRIDE
{
for (insp::intrusive_list<FlashPDSocket>::const_iterator i = sockets.begin(); i != sockets.end(); ++i)
{
FlashPDSocket* sock = *i;
sock->AddToCull();
}
return Module::cull();
}
Version GetVersion() CXX11_OVERRIDE
{
return Version("Allows connection policies to be served to IRC clients that use Adobe Flash.", VF_VENDOR);
}
};
MODULE_INIT(ModuleFlashPD)
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