100 lines
3 KiB
C++
100 lines
3 KiB
C++
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/**
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* hermes antispam proxy
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* Copyright (C) 2006, 2007 Juan José Gutiérrez de Quevedo <juanjo@gutierrezdequevedo.com>
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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; version 2 of the License
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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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* @author Juan José Gutiérrez de Quevedo <juanjo@gutierrezdequevedo.com>
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*/
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#include "Spf.h"
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SPF_server_t *Spf::spfserver=NULL;
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/**
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* constructor
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*
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* it will create a spfserver if this is the first created object of the class.
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* if it isn't, then we just create an spfrequest
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*/
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Spf::Spf():spfrequest(NULL),spfresponse(NULL)
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{
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pthread_mutex_init(&mutex,NULL);
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if(NULL==spfserver)
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if(NULL==(spfserver=SPF_server_new(SPF_DNS_CACHE,0)))
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throw Exception(_("Can't initialize SPF library"),__FILE__,__LINE__);
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if(NULL==(spfrequest=SPF_request_new(spfserver)))
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throw Exception(_("Can't initialize SPF request"),__FILE__,__LINE__);
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}
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/**
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* destructor
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*
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* frees the memory of the spfrequest
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*/
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Spf::~Spf()
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{
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pthread_mutex_destroy(&mutex);
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if(NULL!=spfrequest) SPF_request_free(spfrequest);
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}
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/**
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* frees all memory related to the spf class
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*
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* this is needed because the common things are only initialized
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* once (and are static), and when we close the program we need
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* to deinitialize them
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*/
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void Spf::deinitialize()
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{
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if(NULL!=spfserver)
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SPF_server_free(spfserver);
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}
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/**
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* make a query to the dns system for an spf record
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*
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* highly inspired from fakehermes' source
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*
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* @param ip the ip of the remote server
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* @param helo the hello string of the remote server
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* @param from the envelope from address
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*
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* @returns true if it is not incorrect
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*/
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bool Spf::query(string ip,string helo,string from)
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{
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bool retval=false;
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if(SPF_request_set_ipv4_str(spfrequest,ip.c_str()))
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throw Exception(_("Error configuring IP for SPF request"),__FILE__,__LINE__);
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if(SPF_request_set_helo_dom(spfrequest,helo.c_str()))
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throw Exception(_("Error configuring HELO for SPF request"),__FILE__,__LINE__);
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if(SPF_request_set_env_from(spfrequest,from.c_str()))
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throw Exception(_("Error configuring FROM for SPF request"),__FILE__,__LINE__);
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//make the actual query
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pthread_mutex_lock(&mutex);
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SPF_request_query_mailfrom(spfrequest,&spfresponse);
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pthread_mutex_unlock(&mutex);
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if(NULL!=spfresponse)
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{
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retval=(SPF_RESULT_FAIL==SPF_response_result(spfresponse)||SPF_RESULT_SOFTFAIL==SPF_response_result(spfresponse))?false:true;
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SPF_response_free(spfresponse);
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}
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return retval;
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}
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