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649 lines
18 KiB
649 lines
18 KiB
/*
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* Copyright (c) 2000, 2001 Alex Zepeda <zipzippy@sonic.net>
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* Copyright (c) 2001 Michael Häckel <Michael@Haeckel.Net>
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* Copyright (c) 2002 Aaron J. Seigo <aseigo@olympusproject.org>
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* Copyright (c) 2003 Marc Mutz <mutz@kde.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <config.h>
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#include <stdio.h>
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#ifdef HAVE_LIBSASL2
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extern "C" {
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#include <sasl/sasl.h>
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}
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#endif
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#include "smtp.h"
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#include "request.h"
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#include "response.h"
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#include "transactionstate.h"
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#include "command.h"
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using KioSMTP::Capabilities;
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using KioSMTP::Command;
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using KioSMTP::EHLOCommand;
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using KioSMTP::AuthCommand;
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using KioSMTP::MailFromCommand;
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using KioSMTP::RcptToCommand;
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using KioSMTP::DataCommand;
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using KioSMTP::TransferCommand;
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using KioSMTP::Request;
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using KioSMTP::Response;
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using KioSMTP::TransactionState;
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#include <tdeemailsettings.h>
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#include <ksock.h>
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#include <kdebug.h>
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#include <kinstance.h>
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#include <tdeio/connection.h>
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#include <tdeio/slaveinterface.h>
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#include <tdelocale.h>
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#include <tqstring.h>
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#include <tqstringlist.h>
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#include <tqcstring.h>
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#include <memory>
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using std::auto_ptr;
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#ifdef HAVE_SYS_SOCKET_H
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# include <sys/socket.h>
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#endif
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#include <netdb.h>
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#ifndef NI_NAMEREQD
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// FIXME for KDE 3.3: fake defintion
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// API design flaw in KExtendedSocket::resolve
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# define NI_NAMEREQD 0
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#endif
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extern "C" {
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KDE_EXPORT int kdemain(int argc, char **argv);
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}
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int kdemain(int argc, char **argv)
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{
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TDEInstance instance("tdeio_smtp");
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if (argc != 4) {
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fprintf(stderr,
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"Usage: tdeio_smtp protocol domain-socket1 domain-socket2\n");
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exit(-1);
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}
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#ifdef HAVE_LIBSASL2
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if ( sasl_client_init( NULL ) != SASL_OK ) {
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fprintf(stderr, "SASL library initialization failed!\n");
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exit(-1);
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}
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#endif
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SMTPProtocol slave( argv[2], argv[3], tqstricmp( argv[1], "smtps" ) == 0 );
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slave.dispatchLoop();
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#ifdef HAVE_LIBSASL2
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sasl_done();
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#endif
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return 0;
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}
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SMTPProtocol::SMTPProtocol(const TQCString & pool, const TQCString & app,
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bool useSSL)
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: TCPSlaveBase(useSSL ? 465 : 25,
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useSSL ? "smtps" : "smtp",
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pool, app, useSSL),
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m_iOldPort(0),
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m_opened(false)
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{
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//kdDebug(7112) << "SMTPProtocol::SMTPProtocol" << endl;
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mPendingCommandQueue.setAutoDelete( true );
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mSentCommandQueue.setAutoDelete( true );
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}
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unsigned int SMTPProtocol::sendBufferSize() const {
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// ### how much is eaten by SSL/TLS overhead?
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const int fd = fileno( fp );
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int value = -1;
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kde_socklen_t len = sizeof(value);
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if ( fd < 0 || ::getsockopt( fd, SOL_SOCKET, SO_SNDBUF, (char*)&value, &len ) )
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value = 1024; // let's be conservative
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kdDebug(7112) << "send buffer size seems to be " << value << " octets." << endl;
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return value > 0 ? value : 1024 ;
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}
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SMTPProtocol::~SMTPProtocol() {
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//kdDebug(7112) << "SMTPProtocol::~SMTPProtocol" << endl;
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smtp_close();
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}
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void SMTPProtocol::openConnection() {
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if ( smtp_open() )
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connected();
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else
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closeConnection();
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}
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void SMTPProtocol::closeConnection() {
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smtp_close();
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}
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void SMTPProtocol::special( const TQByteArray & aData ) {
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TQDataStream s( aData, IO_ReadOnly );
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int what;
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s >> what;
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if ( what == 'c' ) {
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infoMessage( createSpecialResponse() );
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#ifndef NDEBUG
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kdDebug(7112) << "special('c') returns \"" << createSpecialResponse() << "\"" << endl;
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#endif
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} else if ( what == 'N' ) {
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if ( !execute( Command::NOOP ) )
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return;
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} else {
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error( TDEIO::ERR_INTERNAL,
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i18n("The application sent an invalid request.") );
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return;
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}
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finished();
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}
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// Usage: smtp://smtphost:port/send?to=user@host.com&subject=blah
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// If smtphost is the name of a profile, it'll use the information
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// provided by that profile. If it's not a profile name, it'll use it as
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// nature intended.
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// One can also specify in the query:
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// headers=0 (turns off header generation)
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// to=emailaddress
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// cc=emailaddress
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// bcc=emailaddress
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// subject=text
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// profile=text (this will override the "host" setting)
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// hostname=text (used in the HELO)
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// body={7bit,8bit} (default: 7bit; 8bit activates the use of the 8BITMIME SMTP extension)
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void SMTPProtocol::put(const KURL & url, int /*permissions */ ,
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bool /*overwrite */ , bool /*resume */ )
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{
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Request request = Request::fromURL( url ); // parse settings from URL's query
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KEMailSettings mset;
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KURL open_url = url;
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if ( !request.hasProfile() ) {
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//kdDebug(7112) << "tdeio_smtp: Profile is null" << endl;
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bool hasProfile = mset.profiles().contains( open_url.host() );
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if ( hasProfile ) {
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mset.setProfile(open_url.host());
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open_url.setHost(mset.getSetting(KEMailSettings::OutServer));
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m_sUser = mset.getSetting(KEMailSettings::OutServerLogin);
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m_sPass = mset.getSetting(KEMailSettings::OutServerPass);
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if (m_sUser.isEmpty())
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m_sUser = TQString::null;
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if (m_sPass.isEmpty())
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m_sPass = TQString::null;
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open_url.setUser(m_sUser);
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open_url.setPass(m_sPass);
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m_sServer = open_url.host();
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m_iPort = open_url.port();
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}
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else {
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mset.setProfile(mset.defaultProfileName());
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}
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}
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else {
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mset.setProfile( request.profileName() );
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}
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// Check KEMailSettings to see if we've specified an E-Mail address
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// if that worked, check to see if we've specified a real name
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// and then format accordingly (either: emailaddress@host.com or
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// Real Name <emailaddress@host.com>)
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if ( !request.hasFromAddress() ) {
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const TQString from = mset.getSetting( KEMailSettings::EmailAddress );
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if ( !from.isNull() )
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request.setFromAddress( from );
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else if ( request.emitHeaders() ) {
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error(TDEIO::ERR_NO_CONTENT, i18n("The sender address is missing."));
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return;
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}
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}
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if ( !smtp_open( request.heloHostname() ) )
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{
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error(TDEIO::ERR_SERVICE_NOT_AVAILABLE,
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i18n("SMTPProtocol::smtp_open failed (%1)") // ### better error message?
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.arg(open_url.path()));
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return;
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}
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if ( request.is8BitBody()
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&& !haveCapability("8BITMIME") && metaData("8bitmime") != "on" ) {
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error( TDEIO::ERR_SERVICE_NOT_AVAILABLE,
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i18n("Your server does not support sending of 8-bit messages.\n"
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"Please use base64 or quoted-printable encoding.") );
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return;
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}
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queueCommand( new MailFromCommand( this, request.fromAddress().latin1(),
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request.is8BitBody(), request.size() ) );
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// Loop through our To and CC recipients, and send the proper
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// SMTP commands, for the benefit of the server.
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TQStringList recipients = request.recipients();
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for ( TQStringList::const_iterator it = recipients.begin() ; it != recipients.end() ; ++it )
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queueCommand( new RcptToCommand( this, (*it).latin1() ) );
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queueCommand( Command::DATA );
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queueCommand( new TransferCommand( this, request.headerFields( mset.getSetting( KEMailSettings::RealName ) ) ) );
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TransactionState ts;
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if ( !executeQueuedCommands( &ts ) ) {
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if ( ts.errorCode() )
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error( ts.errorCode(), ts.errorMessage() );
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} else
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finished();
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}
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void SMTPProtocol::setHost(const TQString & host, int port,
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const TQString & user, const TQString & pass)
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{
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m_sServer = host;
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m_iPort = port;
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m_sUser = user;
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m_sPass = pass;
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}
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bool SMTPProtocol::sendCommandLine( const TQCString & cmdline ) {
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//kdDebug( cmdline.length() < 4096, 7112) << "C: " << cmdline.data();
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//kdDebug( cmdline.length() >= 4096, 7112) << "C: <" << cmdline.length() << " bytes>" << endl;
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kdDebug( 7112) << "C: <" << cmdline.length() << " bytes>" << endl;
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ssize_t cmdline_len = cmdline.length();
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if ( write( cmdline.data(), cmdline_len ) != cmdline_len ) {
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error( TDEIO::ERR_COULD_NOT_WRITE, m_sServer );
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return false;
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}
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return true;
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}
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Response SMTPProtocol::getResponse( bool * ok ) {
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if ( ok )
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*ok = false;
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Response response;
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char buf[2048];
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int recv_len = 0;
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do {
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// wait for data...
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if ( !waitForResponse( 600 ) ) {
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error( TDEIO::ERR_SERVER_TIMEOUT, m_sServer );
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return response;
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}
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// ...read data...
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recv_len = readLine( buf, sizeof(buf) - 1 );
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if ( recv_len < 1 && !isConnectionValid() ) {
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error( TDEIO::ERR_CONNECTION_BROKEN, m_sServer );
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return response;
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}
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kdDebug(7112) << "S: " << TQCString( buf, recv_len + 1 ).data();
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// ...and parse lines...
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response.parseLine( buf, recv_len );
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// ...until the response is complete or the parser is so confused
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// that it doesn't think a RSET would help anymore:
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} while ( !response.isComplete() && response.isWellFormed() );
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if ( !response.isValid() ) {
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error( TDEIO::ERR_NO_CONTENT, i18n("Invalid SMTP response (%1) received.").arg(response.code()) );
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return response;
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}
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if ( ok )
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*ok = true;
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return response;
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}
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bool SMTPProtocol::executeQueuedCommands( TransactionState * ts ) {
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assert( ts );
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kdDebug( canPipelineCommands(), 7112 ) << "using pipelining" << endl;
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while( !mPendingCommandQueue.isEmpty() ) {
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TQCString cmdline = collectPipelineCommands( ts );
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if ( ts->failedFatally() ) {
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smtp_close( false ); // _hard_ shutdown
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return false;
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}
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if ( ts->failed() )
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break;
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if ( cmdline.isEmpty() )
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continue;
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if ( !sendCommandLine( cmdline ) ||
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!batchProcessResponses( ts ) ||
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ts->failedFatally() ) {
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smtp_close( false ); // _hard_ shutdown
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return false;
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}
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}
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if ( ts->failed() ) {
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if ( !execute( Command::RSET ) )
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smtp_close( false );
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return false;
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}
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return true;
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}
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TQCString SMTPProtocol::collectPipelineCommands( TransactionState * ts ) {
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assert( ts );
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TQCString cmdLine;
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unsigned int cmdLine_len = 0;
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while ( mPendingCommandQueue.head() ) {
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Command * cmd = mPendingCommandQueue.head();
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if ( cmd->doNotExecute( ts ) ) {
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delete mPendingCommandQueue.dequeue();
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if ( cmdLine_len )
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break;
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else
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continue;
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}
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if ( cmdLine_len && cmd->mustBeFirstInPipeline() )
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break;
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if ( cmdLine_len && !canPipelineCommands() )
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break;
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while ( !cmd->isComplete() && !cmd->needsResponse() ) {
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const TQCString currentCmdLine = cmd->nextCommandLine( ts );
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if ( ts->failedFatally() )
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return cmdLine;
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const unsigned int currentCmdLine_len = currentCmdLine.length();
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if ( cmdLine_len && cmdLine_len + currentCmdLine_len > sendBufferSize() ) {
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// must all fit into the send buffer, else connection deadlocks,
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// but we need to have at least _one_ command to send
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cmd->ungetCommandLine( currentCmdLine, ts );
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return cmdLine;
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}
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cmdLine_len += currentCmdLine_len;
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cmdLine += currentCmdLine;
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}
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mSentCommandQueue.enqueue( mPendingCommandQueue.dequeue() );
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if ( cmd->mustBeLastInPipeline() )
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break;
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}
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return cmdLine;
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}
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bool SMTPProtocol::batchProcessResponses( TransactionState * ts ) {
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assert( ts );
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while ( !mSentCommandQueue.isEmpty() ) {
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Command * cmd = mSentCommandQueue.head();
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assert( cmd->isComplete() );
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bool ok = false;
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Response r = getResponse( &ok );
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if ( !ok )
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return false;
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cmd->processResponse( r, ts );
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if ( ts->failedFatally() )
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return false;
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mSentCommandQueue.remove();
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}
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return true;
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}
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void SMTPProtocol::queueCommand( int type ) {
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queueCommand( Command::createSimpleCommand( type, this ) );
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}
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bool SMTPProtocol::execute( int type, TransactionState * ts ) {
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auto_ptr<Command> cmd( Command::createSimpleCommand( type, this ) );
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kdFatal( !cmd.get(), 7112 ) << "Command::createSimpleCommand( " << type << " ) returned null!" << endl;
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return execute( cmd.get(), ts );
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}
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// ### fold into pipelining engine? How? (execute() is often called
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// ### when command queues are _not_ empty!)
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bool SMTPProtocol::execute( Command * cmd, TransactionState * ts )
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{
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kdFatal( !cmd, 7112 ) << "SMTPProtocol::execute() called with no command to run!" << endl;
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if (!cmd)
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return false;
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if ( cmd->doNotExecute( ts ) )
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return true;
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do {
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while ( !cmd->isComplete() && !cmd->needsResponse() ) {
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const TQCString cmdLine = cmd->nextCommandLine( ts );
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if ( ts && ts->failedFatally() ) {
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smtp_close( false );
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return false;
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}
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if ( cmdLine.isEmpty() )
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continue;
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if ( !sendCommandLine( cmdLine ) ) {
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smtp_close( false );
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return false;
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}
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}
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bool ok = false;
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Response r = getResponse( &ok );
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if ( !ok ) {
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smtp_close( false );
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return false;
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}
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if ( !cmd->processResponse( r, ts ) ) {
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if ( ts && ts->failedFatally() ||
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cmd->closeConnectionOnError() ||
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!execute( Command::RSET ) )
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smtp_close( false );
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return false;
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}
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} while ( !cmd->isComplete() );
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return true;
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}
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bool SMTPProtocol::smtp_open(const TQString& fakeHostname)
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{
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if (m_opened &&
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m_iOldPort == port(m_iPort) &&
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m_sOldServer == m_sServer &&
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m_sOldUser == m_sUser &&
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(fakeHostname.isNull() || m_hostname == fakeHostname))
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return true;
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smtp_close();
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if (!connectToHost(m_sServer, m_iPort))
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return false; // connectToHost has already send an error message.
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m_opened = true;
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bool ok = false;
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Response greeting = getResponse( &ok );
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if ( !ok || !greeting.isOk() )
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{
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if ( ok )
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error( TDEIO::ERR_COULD_NOT_LOGIN,
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i18n("The server did not accept the connection.\n"
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"%1").arg( greeting.errorMessage() ) );
|
|
smtp_close();
|
|
return false;
|
|
}
|
|
|
|
if (!fakeHostname.isNull())
|
|
{
|
|
m_hostname = fakeHostname;
|
|
}
|
|
else
|
|
{
|
|
TQString tmpPort;
|
|
TDESocketAddress* addr = KExtendedSocket::localAddress(m_iSock);
|
|
// perform name lookup. NI_NAMEREQD means: don't return a numeric
|
|
// value (we need to know when we get have the IP address, so we
|
|
// can enclose it in sqaure brackets (domain-literal). Failure to
|
|
// do so is normally harmless with IPv4, but fails for IPv6:
|
|
if (KExtendedSocket::resolve(addr, m_hostname, tmpPort, NI_NAMEREQD) != 0)
|
|
// FQDN resolution failed
|
|
// use the IP address as domain-literal
|
|
m_hostname = '[' + addr->nodeName() + ']';
|
|
delete addr;
|
|
|
|
if(m_hostname.isEmpty())
|
|
{
|
|
m_hostname = "localhost.invalid";
|
|
}
|
|
}
|
|
|
|
EHLOCommand ehloCmdPreTLS( this, m_hostname );
|
|
if ( !execute( &ehloCmdPreTLS ) ) {
|
|
smtp_close();
|
|
return false;
|
|
}
|
|
|
|
if ( ( haveCapability("STARTTLS") && canUseTLS() && metaData("tls") != "off" )
|
|
|| metaData("tls") == "on" ) {
|
|
// For now we're gonna force it on.
|
|
|
|
if ( execute( Command::STARTTLS ) ) {
|
|
|
|
// re-issue EHLO to refresh the capability list (could be have
|
|
// been faked before TLS was enabled):
|
|
EHLOCommand ehloCmdPostTLS( this, m_hostname );
|
|
if ( !execute( &ehloCmdPostTLS ) ) {
|
|
smtp_close();
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
// Now we try and login
|
|
if (!authenticate()) {
|
|
smtp_close();
|
|
return false;
|
|
}
|
|
|
|
m_iOldPort = m_iPort;
|
|
m_sOldServer = m_sServer;
|
|
m_sOldUser = m_sUser;
|
|
m_sOldPass = m_sPass;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool SMTPProtocol::authenticate()
|
|
{
|
|
// return with success if the server doesn't support SMTP-AUTH or an user
|
|
// name is not specified and metadata doesn't tell us to force it.
|
|
if ( (m_sUser.isEmpty() || !haveCapability( "AUTH" )) &&
|
|
metaData( "sasl" ).isEmpty() ) return true;
|
|
|
|
TDEIO::AuthInfo authInfo;
|
|
authInfo.username = m_sUser;
|
|
authInfo.password = m_sPass;
|
|
authInfo.prompt = i18n("Username and password for your SMTP account:");
|
|
|
|
TQStringList strList;
|
|
|
|
if (!metaData("sasl").isEmpty())
|
|
strList.append(metaData("sasl").latin1());
|
|
else
|
|
strList = mCapabilities.saslMethodsQSL();
|
|
|
|
AuthCommand authCmd( this, strList.join(" ").latin1(), m_sServer, authInfo );
|
|
bool ret = execute( &authCmd );
|
|
m_sUser = authInfo.username;
|
|
m_sPass = authInfo.password;
|
|
return ret;
|
|
}
|
|
|
|
void SMTPProtocol::parseFeatures( const Response & ehloResponse ) {
|
|
mCapabilities = Capabilities::fromResponse( ehloResponse );
|
|
|
|
TQString category = usingTLS() ? "TLS" : usingSSL() ? "SSL" : "PLAIN" ;
|
|
setMetaData( category + " AUTH METHODS", mCapabilities.authMethodMetaData() );
|
|
setMetaData( category + " CAPABILITIES", mCapabilities.asMetaDataString() );
|
|
#ifndef NDEBUG
|
|
kdDebug(7112) << "parseFeatures() " << category << " AUTH METHODS:"
|
|
<< '\n' + mCapabilities.authMethodMetaData() << endl
|
|
<< "parseFeatures() " << category << " CAPABILITIES:"
|
|
<< '\n' + mCapabilities.asMetaDataString() << endl;
|
|
#endif
|
|
}
|
|
|
|
void SMTPProtocol::smtp_close( bool nice ) {
|
|
if (!m_opened) // We're already closed
|
|
return;
|
|
|
|
if ( nice )
|
|
execute( Command::QUIT );
|
|
kdDebug( 7112 ) << "closing connection" << endl;
|
|
closeDescriptor();
|
|
m_sOldServer = TQString::null;
|
|
m_sOldUser = TQString::null;
|
|
m_sOldPass = TQString::null;
|
|
|
|
mCapabilities.clear();
|
|
mPendingCommandQueue.clear();
|
|
mSentCommandQueue.clear();
|
|
|
|
m_opened = false;
|
|
}
|
|
|
|
void SMTPProtocol::stat(const KURL & url)
|
|
{
|
|
TQString path = url.path();
|
|
error(TDEIO::ERR_DOES_NOT_EXIST, url.path());
|
|
}
|
|
|