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Hide the returned value of user.auth from sniffing when it holds a password. git-svn-id: http://yate.null.ro/svn/yate/trunk@4445 acf43c95-373e-0410-b603-e72c3f656dc1
198 lines
4.9 KiB
C++
198 lines
4.9 KiB
C++
/*
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* msgsniff.cpp
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* This file is part of the YATE Project http://YATE.null.ro
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*
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* A sample message sniffer that inserts a wildcard message handler
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*
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* Yet Another Telephony Engine - a fully featured software PBX and IVR
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* Copyright (C) 2004-2006 Null Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <yatengine.h>
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using namespace TelEngine;
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namespace { // anonymous
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static const char* s_debugs[] =
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{
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"on",
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"off",
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"enable",
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"disable",
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"true",
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"false",
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"yes",
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"no",
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"filter",
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0
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};
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class MsgSniff : public Plugin
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{
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public:
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MsgSniff();
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virtual void initialize();
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private:
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bool m_first;
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};
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class SniffHandler : public MessageHandler
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{
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public:
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SniffHandler() : MessageHandler(0,0) { }
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virtual bool received(Message &msg);
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};
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class HookHandler : public MessagePostHook
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{
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public:
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virtual void dispatched(const Message& msg, bool handled);
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};
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static bool s_active = true;
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static Regexp s_filter;
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static Mutex s_mutex(false,"FilterSniff");
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static void dumpParams(const Message &msg, String& par)
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{
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unsigned n = msg.length();
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for (unsigned i = 0; i < n; i++) {
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const NamedString *s = msg.getParam(i);
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if (s) {
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par << "\r\n param['" << s->name() << "'] = ";
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if (s->name() == "password")
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par << "(hidden)";
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else
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par << "'" << *s << "'";
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}
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}
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}
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bool SniffHandler::received(Message &msg)
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{
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if (msg == YSTRING("engine.timer"))
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return false;
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if (msg == YSTRING("engine.command")) {
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static const String name("sniffer");
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String line(msg.getValue(YSTRING("line")));
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if (line.startSkip(name)) {
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line >> s_active;
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line.trimSpaces();
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if (line.startSkip("filter")) {
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s_mutex.lock();
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s_filter = line;
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s_mutex.unlock();
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}
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msg.retValue() << "Message sniffer is " << (s_active ? "on" : "off");
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if (s_active && s_filter)
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msg.retValue() << " filter " << s_filter;
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msg.retValue() << "\r\n";
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return true;
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}
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line = msg.getParam(YSTRING("partline"));
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if (line.null()) {
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if (name.startsWith(msg.getValue(YSTRING("partword"))))
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msg.retValue().append(name,"\t");
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}
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else if (name == line) {
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line = msg.getValue(YSTRING("partword"));
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for (const char** b = s_debugs; *b; b++)
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if (line.null() || String(*b).startsWith(line))
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msg.retValue().append(*b,"\t");
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}
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}
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if (!s_active)
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return false;
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Lock lock(s_mutex);
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if (s_filter && !s_filter.matches(msg))
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return false;
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lock.drop();
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String par;
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dumpParams(msg,par);
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Output("Sniffed '%s' time=%u.%06u%s\r\n thread=%p '%s'\r\n data=%p\r\n retval='%s'%s",
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msg.c_str(),
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(unsigned int)(msg.msgTime().usec() / 1000000),
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(unsigned int)(msg.msgTime().usec() % 1000000),
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(msg.broadcast() ? " (broadcast)" : ""),
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Thread::current(),
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Thread::currentName(),
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msg.userData(),
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msg.retValue().c_str(),
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par.safe());
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return false;
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};
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void HookHandler::dispatched(const Message& msg, bool handled)
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{
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if ((!s_active) || (msg == YSTRING("engine.timer")))
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return;
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Lock lock(s_mutex);
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if (s_filter && !s_filter.matches(msg))
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return;
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lock.drop();
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u_int64_t dt = Time::now() - msg.msgTime().usec();
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String par;
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dumpParams(msg,par);
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const char* rval = msg.retValue().c_str();
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const char* rsep = "'";
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if (handled && rval && (rval[0] != '-' || rval[1]) && (msg == YSTRING("user.auth"))) {
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rval = "(hidden)";
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rsep = "";
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}
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Output("Returned %s '%s' delay=%u.%06u%s\r\n thread=%p '%s'\r\n data=%p\r\n retval=%s%s%s%s",
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String::boolText(handled),
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msg.c_str(),
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(unsigned int)(dt / 1000000),
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(unsigned int)(dt % 1000000),
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(msg.broadcast() ? " (broadcast)" : ""),
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Thread::current(),
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Thread::currentName(),
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msg.userData(),
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rsep,rval,rsep,
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par.safe());
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}
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MsgSniff::MsgSniff()
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: Plugin("msgsniff"),
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m_first(true)
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{
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Output("Loaded module MsgSniffer");
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}
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void MsgSniff::initialize()
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{
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Output("Initializing module MsgSniffer");
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if (m_first) {
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m_first = false;
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s_active = Engine::config().getBoolValue("general","msgsniff",false);
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s_mutex.lock();
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s_filter = Engine::config().getValue("general","filtersniff");
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s_mutex.unlock();
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Engine::install(new SniffHandler);
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Engine::self()->setHook(new HookHandler);
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}
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}
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INIT_PLUGIN(MsgSniff);
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}; // anonymous namespace
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/* vi: set ts=8 sw=4 sts=4 noet: */
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