235 lines
6.9 KiB
C++
235 lines
6.9 KiB
C++
/**
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* pgsqlroute.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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* Postgres SQL based routing
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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 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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <telengine.h>
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#include <telephony.h>
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#include <libpq-fe.h>
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#include <string.h>
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using namespace TelEngine;
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static PGconn *conn=0;
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static Mutex dbmutex;
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static unsigned s_route_rq = 0;
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static unsigned s_route_err = 0;
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static unsigned s_route_yes = 0;
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static unsigned s_route_no = 0;
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class RouteHandler : public MessageHandler
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{
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public:
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RouteHandler(const char *name, unsigned prio = 1)
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: MessageHandler(name,prio) { }
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virtual bool received(Message &msg);
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};
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bool RouteHandler::received(Message &msg)
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{
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char buffer[2048];
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unsigned long long tmr = Time::now();
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String called(msg.getValue("called"));
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if (called.null())
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return false;
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Lock lock(dbmutex);
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if (!conn)
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return false;
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s_route_rq++;
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const char *context = c_safe(msg.getValue("context","default"));
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snprintf(buffer,sizeof(buffer),"SELECT tehno,data,length (prefix) as lll"
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" from route where prefix= substring('%s',1,length(prefix))"
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" and context='%s' order by lll desc LIMIT 1",called.c_str(),context);
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PGresult *respgsql = PQexec(conn,buffer);
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if (!respgsql || PQresultStatus(respgsql) != PGRES_TUPLES_OK)
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{
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Debug(DebugFail,"Failed to query from database: %s",
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PQerrorMessage(conn));
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s_route_err++;
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return false;
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}
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if (PQntuples(respgsql) == 0) {
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Debug(DebugFail,"No route.");
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s_route_no++;
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return false;
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}
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msg.retValue() = String(PQgetvalue(respgsql,0,0))+"/" + String(PQgetvalue(respgsql,0,1));
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Debug(DebugInfo,"Routing call to '%s' in context '%s' using '%s' tehnology and data in %llu usec",
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called.c_str(),context,msg.retValue().c_str(),Time::now()-tmr);
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s_route_yes++;
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return true;
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};
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class PrerouteHandler : public MessageHandler
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{
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public:
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PrerouteHandler(const char *name, unsigned prio = 1)
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: MessageHandler(name,prio) { }
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virtual bool received(Message &msg);
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};
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bool PrerouteHandler::received(Message &msg)
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{
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char buffer[2048];
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// char select_called[200];
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// char select_channel[200];
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unsigned long long tmr = Time::now();
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// return immediately if there is already a context
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if (msg.getValue("context"))
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return false;
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String caller(msg.getValue("caller"));
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if (caller.null())
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return false;
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Lock lock(dbmutex);
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if (!conn)
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return false;
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String called(msg.getValue("called"));
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if (!caller.null())
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// snprintf(select_called,sizeof(select_called),"and called='%s'",called.c_str());
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snprintf(buffer,sizeof(buffer),"SELECT context,length (caller) as lll from preroute where caller= substring('%s',1,length(caller)) order by lll desc limit 1;",caller.c_str());
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PGresult *respgsql = PQexec(conn,buffer);
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if (!respgsql || PQresultStatus(respgsql) != PGRES_TUPLES_OK)
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{
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Debug(DebugFail,"Failed to query from database: %s",
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PQerrorMessage(conn));
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return false;
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}
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if (PQntuples(respgsql) == 0) {
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Debug(DebugFail,"No preroute.");
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return false;
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}
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msg.addParam("context",PQgetvalue(respgsql,0,0));
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Debug(DebugInfo,"Classifying caller '%s' in context '%s' in %llu usec",
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caller.c_str(),msg.getValue("context"),Time::now()-tmr);
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return true;
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#if 0
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NamedList *l = s_cfg.getSection("contexts");
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if (l) {
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unsigned int len = l->length();
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for (unsigned int i=0; i<len; i++) {
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NamedString *n = l->getParam(i);
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if (n) {
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Regexp r(n->name());
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if (s.matches(r)) {
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msg.addParam("context",s.replaceMatches(*n));
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Debug(DebugInfo,"Classifying caller '%s' in context '%s' by rule #%u '%s' in %llu usec",
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s.c_str(),msg.getValue("context"),i+1,r.c_str(),Time::now()-tmr);
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return true;
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}
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}
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}
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}
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Debug(DebugInfo,"Could not classify call from '%s', wasted %llu usec",
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s.c_str(),Time::now()-tmr);
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return false;
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#endif
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};
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class StatusHandler : public MessageHandler
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{
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public:
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StatusHandler(const char *name, unsigned prio = 1)
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: MessageHandler(name,prio) { }
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virtual bool received(Message &msg);
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};
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bool StatusHandler::received(Message &msg)
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{
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const char *sel = msg.getValue("module");
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if (sel && ::strcmp(sel,"pgsqlroute"))
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return false;
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msg.retValue() << "name=pgsqlroute,type=misc";
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msg.retValue() << ";conn=" << (conn != 0);
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msg.retValue() << ",total=" << s_route_rq << ",errors=" << s_route_err;
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msg.retValue() << ",routed=" << s_route_yes << ",noroute=" << s_route_no;
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msg.retValue() << "\n";
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return false;
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}
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class PGSQLRoutePlugin : public Plugin
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{
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public:
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PGSQLRoutePlugin();
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~PGSQLRoutePlugin();
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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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PGSQLRoutePlugin::PGSQLRoutePlugin()
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: m_first(true)
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{
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Output("Loaded module PGSQLRoute");
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}
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PGSQLRoutePlugin::~PGSQLRoutePlugin()
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{
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if (conn) {
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PQfinish(conn);
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conn = 0;
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}
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}
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void PGSQLRoutePlugin::initialize()
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{
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char *pgoptions=NULL,
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*pgtty=NULL;
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Output("Initializing module PGSQLRoute");
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Configuration cfg(Engine::configFile("pgsqlroute"));
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const char *pghost = c_safe(cfg.getValue("general","host","localhost"));
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const char *pgport = c_safe(cfg.getValue("general","port","5432"));
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const char *dbName = c_safe(cfg.getValue("general","database","yate"));
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const char *dbUser = c_safe(cfg.getValue("general","user","postgres"));
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const char *dbPass = c_safe(cfg.getValue("general","password"));
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Lock lock(dbmutex);
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if (conn)
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PQfinish(conn);
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conn = PQsetdbLogin(pghost,pgport,pgoptions,pgtty,dbName,dbUser,dbPass);
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if (PQstatus(conn) == CONNECTION_BAD) {
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Debug(DebugFail, "Connection to database '%s' failed.", dbName);
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Debug(DebugFail, "%s", PQerrorMessage(conn));
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PQfinish(conn);
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conn = 0;
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return;
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}
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// don't bother to install handlers until we are connected
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if (m_first && conn) {
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m_first = false;
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unsigned prio = cfg.getIntValue("general","priority",100);
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Engine::install(new PrerouteHandler("call.preroute",prio));
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Engine::install(new RouteHandler("call.route",prio));
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Engine::install(new StatusHandler("engine.status"));
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}
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}
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INIT_PLUGIN(PGSQLRoutePlugin);
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/* vi: set ts=8 sw=4 sts=4 noet: */
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