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<h2><a name="content"></a>kandy</h2>
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<h1>modem.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> KMLOCfg</span>
<a name="l00003"></a>00003 <span class="comment"></span>
<a name="l00004"></a>00004 <span class="comment"> A utility to configure the ELSA MicroLink(tm) Office modem.</span>
<a name="l00005"></a>00005 <span class="comment"></span>
<a name="l00006"></a>00006 <span class="comment"> Copyright (C) 2000 Oliver Gantz <Oliver.Gantz@epost.de></span>
<a name="l00007"></a>00007 <span class="comment"></span>
<a name="l00008"></a>00008 <span class="comment"> This program is free software; you can redistribute it and/or modify</span>
<a name="l00009"></a>00009 <span class="comment"> it under the terms of the GNU General Public License as published by</span>
<a name="l00010"></a>00010 <span class="comment"> the Free Software Foundation; either version 2 of the License, or</span>
<a name="l00011"></a>00011 <span class="comment"> (at your option) any later version.</span>
<a name="l00012"></a>00012 <span class="comment"></span>
<a name="l00013"></a>00013 <span class="comment"> This program is distributed in the hope that it will be useful,</span>
<a name="l00014"></a>00014 <span class="comment"> but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00015"></a>00015 <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
<a name="l00016"></a>00016 <span class="comment"> GNU General Public License for more details.</span>
<a name="l00017"></a>00017 <span class="comment"></span>
<a name="l00018"></a>00018 <span class="comment"> You should have received a copy of the GNU General Public License</span>
<a name="l00019"></a>00019 <span class="comment"> along with this program; if not, write to the Free Software</span>
<a name="l00020"></a>00020 <span class="comment"> Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA</span>
<a name="l00021"></a>00021 <span class="comment"></span>
<a name="l00022"></a>00022 <span class="comment"> ------</span>
<a name="l00023"></a>00023 <span class="comment"> ELSA and MicroLink are trademarks of ELSA AG, Aachen.</span>
<a name="l00024"></a>00024 <span class="comment">*/</span>
<a name="l00025"></a>00025
<a name="l00026"></a>00026 <span class="preprocessor">#ifdef HAVE_CONFIG_H</span>
<a name="l00027"></a>00027 <span class="preprocessor"></span><span class="preprocessor">#include "config.h"</span>
<a name="l00028"></a>00028 <span class="preprocessor">#endif</span>
<a name="l00029"></a>00029 <span class="preprocessor"></span>
<a name="l00030"></a>00030 <span class="preprocessor">#include <sys/types.h></span>
<a name="l00031"></a>00031 <span class="preprocessor">#include <sys/stat.h></span>
<a name="l00032"></a>00032 <span class="preprocessor">#include <sys/ioctl.h></span>
<a name="l00033"></a>00033 <span class="preprocessor">#include <fcntl.h></span>
<a name="l00034"></a>00034 <span class="preprocessor">#include <termios.h></span>
<a name="l00035"></a>00035 <span class="preprocessor">#include <unistd.h></span>
<a name="l00036"></a>00036 <span class="preprocessor">#include <stdlib.h></span>
<a name="l00037"></a>00037 <span class="preprocessor">#include <stdio.h></span>
<a name="l00038"></a>00038 <span class="preprocessor">#include <string.h></span>
<a name="l00039"></a>00039 <span class="preprocessor">#include <signal.h></span>
<a name="l00040"></a>00040 <span class="preprocessor">#include <pwd.h></span>
<a name="l00041"></a>00041 <span class="preprocessor">#include <errno.h></span>
<a name="l00042"></a>00042
<a name="l00043"></a>00043 <span class="preprocessor">#include <qglobal.h></span>
<a name="l00044"></a>00044
<a name="l00045"></a>00045 <span class="preprocessor">#include <klocale.h></span>
<a name="l00046"></a>00046 <span class="preprocessor">#include <kdebug.h></span>
<a name="l00047"></a>00047
<a name="l00048"></a>00048 <span class="preprocessor">#include "modem.h"</span>
<a name="l00049"></a>00049
<a name="l00050"></a>00050
<a name="l00051"></a>00051 <span class="preprocessor">#ifndef CSOH</span>
<a name="l00052"></a>00052 <span class="preprocessor"></span><span class="preprocessor">#define CSOH 01</span>
<a name="l00053"></a>00053 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00054"></a>00054 <span class="preprocessor"></span>
<a name="l00055"></a>00055 <span class="preprocessor">#ifndef CSTX</span>
<a name="l00056"></a>00056 <span class="preprocessor"></span><span class="preprocessor">#define CSTX 02</span>
<a name="l00057"></a>00057 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00058"></a>00058 <span class="preprocessor"></span>
<a name="l00059"></a>00059 <span class="preprocessor">#ifndef CEOT</span>
<a name="l00060"></a>00060 <span class="preprocessor"></span><span class="preprocessor">#define CEOT 04</span>
<a name="l00061"></a>00061 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00062"></a>00062 <span class="preprocessor"></span>
<a name="l00063"></a>00063 <span class="preprocessor">#ifndef CACK</span>
<a name="l00064"></a>00064 <span class="preprocessor"></span><span class="preprocessor">#define CACK 06</span>
<a name="l00065"></a>00065 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00066"></a>00066 <span class="preprocessor"></span>
<a name="l00067"></a>00067 <span class="preprocessor">#ifndef CNAK</span>
<a name="l00068"></a>00068 <span class="preprocessor"></span><span class="preprocessor">#define CNAK 025</span>
<a name="l00069"></a>00069 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00070"></a>00070 <span class="preprocessor"></span>
<a name="l00071"></a>00071 <span class="preprocessor">#ifndef CCAN</span>
<a name="l00072"></a>00072 <span class="preprocessor"></span><span class="preprocessor">#define CCAN 030</span>
<a name="l00073"></a>00073 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00074"></a>00074 <span class="preprocessor"></span>
<a name="l00075"></a>00075
<a name="l00076"></a>00076
<a name="l00077"></a>00077 Modem::Modem( KandyPrefs *kprefs, QObject *parent, <span class="keyword">const</span> <span class="keywordtype">char</span> *name ) :
<a name="l00078"></a>00078 QObject(parent, name)
<a name="l00079"></a>00079 {
<a name="l00080"></a>00080 mOpen = <span class="keyword">false</span>;
<a name="l00081"></a>00081
<a name="l00082"></a>00082 prefs = kprefs;
<a name="l00083"></a>00083
<a name="l00084"></a>00084 timer = <span class="keyword">new</span> QTimer( <span class="keyword">this</span>, <span class="stringliteral">"modemtimer"</span> );
<a name="l00085"></a>00085 Q_CHECK_PTR( timer );
<a name="l00086"></a>00086 connect( timer, SIGNAL( timeout() ), SLOT( timerDone() ) );
<a name="l00087"></a>00087
<a name="l00088"></a>00088 init();
<a name="l00089"></a>00089 xreset();
<a name="l00090"></a>00090 }
<a name="l00091"></a>00091
<a name="l00092"></a>00092
<a name="l00093"></a>00093 Modem::~Modem()
<a name="l00094"></a>00094 {
<a name="l00095"></a>00095 close();
<a name="l00096"></a>00096 }
<a name="l00097"></a>00097
<a name="l00098"></a>00098
<a name="l00099"></a>00099 <span class="keywordtype">void</span> Modem::setSpeed( <span class="keywordtype">int</span> speed )
<a name="l00100"></a>00100 {
<a name="l00101"></a>00101 <span class="keywordflow">switch</span> ( speed ) {
<a name="l00102"></a>00102 <span class="keywordflow">case</span> 300:
<a name="l00103"></a>00103 cspeed = B300;
<a name="l00104"></a>00104 <span class="keywordflow">break</span>;
<a name="l00105"></a>00105 <span class="keywordflow">case</span> 600:
<a name="l00106"></a>00106 cspeed = B600;
<a name="l00107"></a>00107 <span class="keywordflow">break</span>;
<a name="l00108"></a>00108 <span class="keywordflow">case</span> 1200:
<a name="l00109"></a>00109 cspeed = B1200;
<a name="l00110"></a>00110 <span class="keywordflow">break</span>;
<a name="l00111"></a>00111 <span class="keywordflow">case</span> 2400:
<a name="l00112"></a>00112 cspeed = B2400;
<a name="l00113"></a>00113 <span class="keywordflow">break</span>;
<a name="l00114"></a>00114 <span class="keywordflow">case</span> 4800:
<a name="l00115"></a>00115 cspeed = B4800;
<a name="l00116"></a>00116 <span class="keywordflow">break</span>;
<a name="l00117"></a>00117 <span class="keywordflow">case</span> 9600:
<a name="l00118"></a>00118 cspeed = B9600;
<a name="l00119"></a>00119 <span class="keywordflow">break</span>;
<a name="l00120"></a>00120 <span class="keywordflow">case</span> 19200:
<a name="l00121"></a>00121 cspeed = B19200;
<a name="l00122"></a>00122 <span class="keywordflow">break</span>;
<a name="l00123"></a>00123 <span class="keywordflow">case</span> 38400:
<a name="l00124"></a>00124 cspeed = B38400;
<a name="l00125"></a>00125 <span class="keywordflow">break</span>;
<a name="l00126"></a>00126 <span class="keywordflow">case</span> 57600:
<a name="l00127"></a>00127 cspeed = B57600;
<a name="l00128"></a>00128 <span class="keywordflow">break</span>;
<a name="l00129"></a>00129 <span class="keywordflow">case</span> 115200:
<a name="l00130"></a>00130 cspeed = B115200;
<a name="l00131"></a>00131 <span class="keywordflow">break</span>;
<a name="l00132"></a>00132 <span class="keywordflow">case</span> 230400:
<a name="l00133"></a>00133 cspeed = B230400;
<a name="l00134"></a>00134 <span class="keywordflow">break</span>;
<a name="l00135"></a>00135 <span class="keywordflow">default</span>:
<a name="l00136"></a>00136 <span class="preprocessor">#ifdef MODEM_DEBUG</span>
<a name="l00137"></a>00137 <span class="preprocessor"></span> fprintf(stderr, <span class="stringliteral">"Modem: setSpeed(): fallback to default speed.\n"</span>);
<a name="l00138"></a>00138 <span class="preprocessor">#endif</span>
<a name="l00139"></a>00139 <span class="preprocessor"></span> cspeed = B38400;
<a name="l00140"></a>00140 }
<a name="l00141"></a>00141 }
<a name="l00142"></a>00142
<a name="l00143"></a>00143
<a name="l00144"></a>00144 <span class="keywordtype">void</span> Modem::setData( <span class="keywordtype">int</span> data )
<a name="l00145"></a>00145 {
<a name="l00146"></a>00146 cflag &= ~CSIZE;
<a name="l00147"></a>00147
<a name="l00148"></a>00148 <span class="keywordflow">switch</span> ( data ) {
<a name="l00149"></a>00149 <span class="keywordflow">case</span> 5:
<a name="l00150"></a>00150 cflag |= CS5;
<a name="l00151"></a>00151 <span class="keywordflow">break</span>;
<a name="l00152"></a>00152 <span class="keywordflow">case</span> 6:
<a name="l00153"></a>00153 cflag |= CS6;
<a name="l00154"></a>00154 <span class="keywordflow">break</span>;
<a name="l00155"></a>00155 <span class="keywordflow">case</span> 7:
<a name="l00156"></a>00156 cflag |= CS7;
<a name="l00157"></a>00157 <span class="keywordflow">break</span>;
<a name="l00158"></a>00158 <span class="keywordflow">default</span>:
<a name="l00159"></a>00159 cflag |= CS8;
<a name="l00160"></a>00160 }
<a name="l00161"></a>00161 }
<a name="l00162"></a>00162
<a name="l00163"></a>00163
<a name="l00164"></a>00164 <span class="keywordtype">void</span> Modem::setParity( <span class="keywordtype">char</span> parity )
<a name="l00165"></a>00165 {
<a name="l00166"></a>00166 cflag &= ~( PARENB | PARODD );
<a name="l00167"></a>00167
<a name="l00168"></a>00168 <span class="keywordflow">if</span> ( parity == <span class="charliteral">'E'</span> )
<a name="l00169"></a>00169 cflag |= PARENB;
<a name="l00170"></a>00170 <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( parity == <span class="charliteral">'O'</span> )
<a name="l00171"></a>00171 cflag |= PARENB | PARODD;
<a name="l00172"></a>00172 }
<a name="l00173"></a>00173
<a name="l00174"></a>00174
<a name="l00175"></a>00175 <span class="keywordtype">void</span> Modem::setStop( <span class="keywordtype">int</span> stop )
<a name="l00176"></a>00176 {
<a name="l00177"></a>00177 <span class="keywordflow">if</span> (stop == 2)
<a name="l00178"></a>00178 cflag |= CSTOPB;
<a name="l00179"></a>00179 <span class="keywordflow">else</span>
<a name="l00180"></a>00180 cflag &= ~CSTOPB;
<a name="l00181"></a>00181 }
<a name="l00182"></a>00182
<a name="l00183"></a>00183
<a name="l00184"></a>00184 <span class="keywordtype">bool</span> Modem::open()
<a name="l00185"></a>00185 {
<a name="l00186"></a>00186 <span class="keyword">struct </span>termios tty;
<a name="l00187"></a>00187
<a name="l00188"></a>00188
<a name="l00189"></a>00189 close();
<a name="l00190"></a>00190
<a name="l00191"></a>00191 <span class="keywordflow">if</span> ( !lockDevice() )
<a name="l00192"></a>00192 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00193"></a>00193
<a name="l00194"></a>00194 QCString dev = QFile::encodeName( (*prefs).serialDevice() );
<a name="l00195"></a>00195 <span class="keyword">const</span> <span class="keywordtype">char</span> *fdev = dev.data();
<a name="l00196"></a>00196 <span class="keywordflow">if</span> ( ( fd = ::open( fdev, O_RDWR | O_NOCTTY | O_NONBLOCK ) ) == -1 ) {
<a name="l00197"></a>00197 emit errorMessage( i18n( <span class="stringliteral">"Unable to open device '%1'. "</span>
<a name="l00198"></a>00198 <span class="stringliteral">"Please check that you have sufficient permissions."</span> )
<a name="l00199"></a>00199 .arg( fdev ) );
<a name="l00200"></a>00200 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00201"></a>00201 }
<a name="l00202"></a>00202
<a name="l00203"></a>00203 tcflush( fd, TCIOFLUSH );
<a name="l00204"></a>00204 <span class="keywordflow">if</span> ( tcgetattr( fd, &init_tty ) == -1 ) {
<a name="l00205"></a>00205 <span class="keywordtype">int</span> errnumber = errno;
<a name="l00206"></a>00206 emit errorMessage( i18n( <span class="stringliteral">"Communication setup failed (tcgetattr code: %1)"</span> )
<a name="l00207"></a>00207 .arg(strerror(errnumber)) );
<a name="l00208"></a>00208 ::close( fd );
<a name="l00209"></a>00209 fd = 0;
<a name="l00210"></a>00210 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00211"></a>00211 }
<a name="l00212"></a>00212
<a name="l00213"></a>00213 memset( &tty, 0, <span class="keyword">sizeof</span>( tty ) );
<a name="l00214"></a>00214 tty.c_iflag = IGNBRK | IGNPAR;
<a name="l00215"></a>00215 tty.c_oflag = 0;
<a name="l00216"></a>00216 tty.c_cflag = cflag;
<a name="l00217"></a>00217 tty.c_lflag = 0;
<a name="l00218"></a>00218 cfsetospeed( &tty, cspeed );
<a name="l00219"></a>00219 cfsetispeed( &tty, cspeed );
<a name="l00220"></a>00220 tcdrain( fd );
<a name="l00221"></a>00221
<a name="l00222"></a>00222 <span class="keywordflow">if</span> ( tcsetattr( fd, TCSANOW, &tty ) == -1 ) {
<a name="l00223"></a>00223 emit errorMessage( i18n( <span class="stringliteral">"tcsetattr() failed."</span> ) );
<a name="l00224"></a>00224 ::close( fd );
<a name="l00225"></a>00225 fd = 0;
<a name="l00226"></a>00226 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00227"></a>00227 }
<a name="l00228"></a>00228
<a name="l00229"></a>00229 sn = <span class="keyword">new</span> QSocketNotifier( fd, QSocketNotifier::Read, <span class="keyword">this</span>,
<a name="l00230"></a>00230 <span class="stringliteral">"modemsocketnotifier"</span> );
<a name="l00231"></a>00231 Q_CHECK_PTR( sn );
<a name="l00232"></a>00232 connect( sn, SIGNAL( activated( <span class="keywordtype">int</span> ) ), SLOT( readChar( <span class="keywordtype">int</span> ) ) );
<a name="l00233"></a>00233
<a name="l00234"></a>00234 mOpen = <span class="keyword">true</span>;
<a name="l00235"></a>00235
<a name="l00236"></a>00236 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00237"></a>00237 }
<a name="l00238"></a>00238
<a name="l00239"></a>00239
<a name="l00240"></a>00240 <span class="keywordtype">void</span> Modem::close()
<a name="l00241"></a>00241 {
<a name="l00242"></a>00242 timer->stop();
<a name="l00243"></a>00243
<a name="l00244"></a>00244 <span class="keyword">delete</span> sn;
<a name="l00245"></a>00245 sn = 0;
<a name="l00246"></a>00246
<a name="l00247"></a>00247 <span class="keywordflow">if</span> ( fd ) {
<a name="l00248"></a>00248 tcflush( fd, TCIOFLUSH );
<a name="l00249"></a>00249 tcsetattr( fd, TCSANOW, &init_tty );
<a name="l00250"></a>00250 ::close( fd );
<a name="l00251"></a>00251 fd = 0;
<a name="l00252"></a>00252 }
<a name="l00253"></a>00253
<a name="l00254"></a>00254 xreset();
<a name="l00255"></a>00255
<a name="l00256"></a>00256 unlockDevice();
<a name="l00257"></a>00257
<a name="l00258"></a>00258 mOpen = <span class="keyword">false</span>;
<a name="l00259"></a>00259 }
<a name="l00260"></a>00260
<a name="l00261"></a>00261
<a name="l00262"></a>00262 <span class="keywordtype">void</span> Modem::flush()
<a name="l00263"></a>00263 {
<a name="l00264"></a>00264 <span class="keywordflow">if</span> ( fd ) {
<a name="l00265"></a>00265 tcflush( fd, TCIOFLUSH );
<a name="l00266"></a>00266 bufpos = 0;
<a name="l00267"></a>00267 }
<a name="l00268"></a>00268 }
<a name="l00269"></a>00269
<a name="l00270"></a>00270 <span class="preprocessor">#ifdef HAVE_LOCKDEV</span>
<a name="l00271"></a>00271 <span class="preprocessor"></span><span class="preprocessor">#include <lockdev.h></span>
<a name="l00272"></a>00272 <span class="preprocessor">#endif</span>
<a name="l00273"></a>00273 <span class="preprocessor"></span>
<a name="l00274"></a>00274 <span class="keywordtype">bool</span> Modem::lockDevice()
<a name="l00275"></a>00275 {
<a name="l00276"></a>00276 <span class="keywordflow">if</span> ( is_locked )
<a name="l00277"></a>00277 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00278"></a>00278
<a name="l00279"></a>00279 <span class="preprocessor">#ifdef HAVE_LOCKDEV</span>
<a name="l00280"></a>00280 <span class="preprocessor"></span> is_locked = !dev_lock( (*prefs).serialDevice().local8Bit() );
<a name="l00281"></a>00281 <span class="keywordflow">if</span> (!is_locked)
<a name="l00282"></a>00282 emit errorMessage( i18n( <span class="stringliteral">"Unable to lock device '%1'."</span> ).arg(
<a name="l00283"></a>00283 (*prefs).serialDevice() ));
<a name="l00284"></a>00284 <span class="keywordflow">return</span> is_locked;
<a name="l00285"></a>00285 <span class="preprocessor">#else</span>
<a name="l00286"></a>00286 <span class="preprocessor"></span> ssize_t count;
<a name="l00287"></a>00287 pid_t pid;
<a name="l00288"></a>00288 <span class="keywordtype">int</span> lfd;
<a name="l00289"></a>00289 <span class="keyword">struct </span>passwd *pw;
<a name="l00290"></a>00290 QStringList pathList;
<a name="l00291"></a>00291 QString fileName, content;
<a name="l00292"></a>00292
<a name="l00293"></a>00293 pathList = QStringList::split( <span class="stringliteral">"/"</span>, (*prefs).serialDevice() );
<a name="l00294"></a>00294 fileName = (*prefs).lockDirectory() + <span class="stringliteral">"/LCK.."</span> + pathList.last();
<a name="l00295"></a>00295
<a name="l00296"></a>00296 <span class="keywordflow">if</span> ( !access( QFile::encodeName( fileName ).data(), F_OK ) ) {
<a name="l00297"></a>00297 <span class="keywordtype">char</span> buf[256];
<a name="l00298"></a>00298
<a name="l00299"></a>00299
<a name="l00300"></a>00300 <span class="keywordflow">if</span> ( ( lfd = ::open( QFile::encodeName( fileName ), O_RDONLY ) ) < 0 ) {
<a name="l00301"></a>00301 emit errorMessage( i18n( <span class="stringliteral">"Unable to open lock file '%1'."</span>)
<a name="l00302"></a>00302 .arg( fileName ) );
<a name="l00303"></a>00303 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00304"></a>00304 }
<a name="l00305"></a>00305
<a name="l00306"></a>00306 count = read( lfd, buf, 79 );
<a name="l00307"></a>00307
<a name="l00308"></a>00308 <span class="keywordflow">if</span> ( count < 0 ) {
<a name="l00309"></a>00309 emit errorMessage( i18n( <span class="stringliteral">"Unable to read lock file '%1'."</span>)
<a name="l00310"></a>00310 .arg( fileName ) );
<a name="l00311"></a>00311 ::close( lfd );
<a name="l00312"></a>00312 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00313"></a>00313 }
<a name="l00314"></a>00314 buf[ count ] = 0;
<a name="l00315"></a>00315 ::close( lfd );
<a name="l00316"></a>00316
<a name="l00317"></a>00317 count = sscanf( buf, <span class="stringliteral">"%d"</span>, &pid );
<a name="l00318"></a>00318 <span class="keywordflow">if</span> ( ( count != 1 ) || ( pid <= 0 ) ) {
<a name="l00319"></a>00319 emit errorMessage( i18n( <span class="stringliteral">"Unable to get PID from file '%1'."</span>)
<a name="l00320"></a>00320 .arg( fileName ) );
<a name="l00321"></a>00321 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00322"></a>00322 }
<a name="l00323"></a>00323
<a name="l00324"></a>00324 <span class="keywordflow">if</span> ( !kill( (pid_t) pid, 0 ) ) {
<a name="l00325"></a>00325 emit errorMessage( i18n( <span class="stringliteral">"Process with PID %1, which is locking the device, is still running."</span>)
<a name="l00326"></a>00326 .arg( pid ) );
<a name="l00327"></a>00327 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00328"></a>00328 }
<a name="l00329"></a>00329
<a name="l00330"></a>00330 <span class="keywordflow">if</span> ( errno != ESRCH ) {
<a name="l00331"></a>00331 emit errorMessage( i18n( <span class="stringliteral">"Unable to emit signal to PID of existing lock file."</span>) );
<a name="l00332"></a>00332 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00333"></a>00333 }
<a name="l00334"></a>00334 }
<a name="l00335"></a>00335
<a name="l00336"></a>00336 <span class="keywordflow">if</span> ( ( lfd = creat( QFile::encodeName( fileName ).data(), 0644 ) ) == -1 ) {
<a name="l00337"></a>00337 emit errorMessage( i18n( <span class="stringliteral">"Unable to create lock file '%1'. "</span>
<a name="l00338"></a>00338 <span class="stringliteral">"Please check that you have sufficient permissions."</span>)
<a name="l00339"></a>00339 .arg( fileName ) );
<a name="l00340"></a>00340 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00341"></a>00341 }
<a name="l00342"></a>00342
<a name="l00343"></a>00343 pid = (int) getpid();
<a name="l00344"></a>00344 pw = getpwuid( getuid() );
<a name="l00345"></a>00345 content.sprintf( <span class="stringliteral">"%08d %s %s"</span>, pid, <span class="stringliteral">"kandy"</span>, pw->pw_name );
<a name="l00346"></a>00346 write( lfd, QFile::encodeName( content ).data(), content.length() );
<a name="l00347"></a>00347 ::close( lfd );
<a name="l00348"></a>00348
<a name="l00349"></a>00349 is_locked = <span class="keyword">true</span>;
<a name="l00350"></a>00350
<a name="l00351"></a>00351 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00352"></a>00352 <span class="preprocessor">#endif</span>
<a name="l00353"></a>00353 <span class="preprocessor"></span>}
<a name="l00354"></a>00354
<a name="l00355"></a>00355
<a name="l00356"></a>00356 <span class="keywordtype">void</span> Modem::unlockDevice()
<a name="l00357"></a>00357 {
<a name="l00358"></a>00358 <span class="preprocessor">#ifdef HAVE_LOCKDEV</span>
<a name="l00359"></a>00359 <span class="preprocessor"></span> dev_unlock( (*prefs).serialDevice().local8Bit(), getpid() );
<a name="l00360"></a>00360 <span class="preprocessor">#else</span>
<a name="l00361"></a>00361 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( is_locked ) {
<a name="l00362"></a>00362 QStringList pathList = QStringList::split( <span class="stringliteral">"/"</span>, (*prefs).serialDevice() );
<a name="l00363"></a>00363
<a name="l00364"></a>00364 QFile::remove( (*prefs).lockDirectory() + <span class="stringliteral">"/LCK.."</span> + pathList.last() );
<a name="l00365"></a>00365 is_locked = <span class="keyword">false</span>;
<a name="l00366"></a>00366 }
<a name="l00367"></a>00367 <span class="preprocessor">#endif</span>
<a name="l00368"></a>00368 <span class="preprocessor"></span>}
<a name="l00369"></a>00369
<a name="l00370"></a>00370
<a name="l00371"></a>00371 <span class="keywordtype">bool</span> Modem::dsrOn()
<a name="l00372"></a>00372 {
<a name="l00373"></a>00373 <span class="keywordtype">int</span> flags;
<a name="l00374"></a>00374
<a name="l00375"></a>00375
<a name="l00376"></a>00376 <span class="keywordflow">if</span> ( !fd ) {
<a name="l00377"></a>00377 <span class="preprocessor">#ifdef MODEM_DEBUG</span>
<a name="l00378"></a>00378 <span class="preprocessor"></span> fprintf( stderr, <span class="stringliteral">"Modem: dsrOn(): File not open.\n"</span> );
<a name="l00379"></a>00379 <span class="preprocessor">#endif</span>
<a name="l00380"></a>00380 <span class="preprocessor"></span> <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00381"></a>00381 }
<a name="l00382"></a>00382
<a name="l00383"></a>00383 <span class="keywordflow">if</span> ( ioctl( fd, TIOCMGET, &flags ) == -1 ) {
<a name="l00384"></a>00384 <span class="preprocessor">#ifdef MODEM_DEBUG</span>
<a name="l00385"></a>00385 <span class="preprocessor"></span> fprintf( stderr, <span class="stringliteral">"Modem: dsrOn(): ioctl() failed.\n"</span> );
<a name="l00386"></a>00386 <span class="preprocessor">#endif</span>
<a name="l00387"></a>00387 <span class="preprocessor"></span> <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00388"></a>00388 }
<a name="l00389"></a>00389
<a name="l00390"></a>00390 <span class="keywordflow">return</span> ( flags & TIOCM_DSR ) != 0;
<a name="l00391"></a>00391 }
<a name="l00392"></a>00392
<a name="l00393"></a>00393
<a name="l00394"></a>00394 <span class="keywordtype">bool</span> Modem::ctsOn()
<a name="l00395"></a>00395 {
<a name="l00396"></a>00396 <span class="keywordtype">int</span> flags;
<a name="l00397"></a>00397
<a name="l00398"></a>00398
<a name="l00399"></a>00399 <span class="keywordflow">if</span> ( !fd ) {
<a name="l00400"></a>00400 <span class="preprocessor">#ifdef MODEM_DEBUG</span>
<a name="l00401"></a>00401 <span class="preprocessor"></span> fprintf( stderr, <span class="stringliteral">"Modem: ctsOn(): File not open.\n"</span> );
<a name="l00402"></a>00402 <span class="preprocessor">#endif</span>
<a name="l00403"></a>00403 <span class="preprocessor"></span> <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00404"></a>00404 }
<a name="l00405"></a>00405
<a name="l00406"></a>00406 <span class="keywordflow">if</span> ( ioctl( fd, TIOCMGET, &flags ) == -1) {
<a name="l00407"></a>00407 <span class="preprocessor">#ifdef MODEM_DEBUG</span>
<a name="l00408"></a>00408 <span class="preprocessor"></span> fprintf( stderr, <span class="stringliteral">"Modem: ctsOn(): ioctl() failed.\n"</span> );
<a name="l00409"></a>00409 <span class="preprocessor">#endif</span>
<a name="l00410"></a>00410 <span class="preprocessor"></span> <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00411"></a>00411 }
<a name="l00412"></a>00412
<a name="l00413"></a>00413 <span class="keywordflow">return</span> ( flags & TIOCM_CTS ) != 0;
<a name="l00414"></a>00414 }
<a name="l00415"></a>00415
<a name="l00416"></a>00416
<a name="l00417"></a>00417 <span class="keywordtype">void</span> Modem::writeChar( <span class="keyword">const</span> <span class="keywordtype">char</span> c )
<a name="l00418"></a>00418 {
<a name="l00419"></a>00419 write( fd, (<span class="keyword">const</span> <span class="keywordtype">void</span> *) &c, 1 );
<a name="l00420"></a>00420 }
<a name="l00421"></a>00421
<a name="l00422"></a>00422
<a name="l00423"></a>00423 <span class="keywordtype">void</span> Modem::writeLine( <span class="keyword">const</span> <span class="keywordtype">char</span> *line )
<a name="l00424"></a>00424 {
<a name="l00425"></a>00425 kdDebug() << <span class="stringliteral">"Modem::writeLine(): "</span> << line << endl;
<a name="l00426"></a>00426
<a name="l00427"></a>00427 write( fd, (<span class="keyword">const</span> <span class="keywordtype">void</span> *) line, strlen( line ) );
<a name="l00428"></a>00428 writeChar( <span class="charliteral">'\r'</span> );
<a name="l00429"></a>00429 }
<a name="l00430"></a>00430
<a name="l00431"></a>00431
<a name="l00432"></a>00432 <span class="keywordtype">void</span> Modem::timerStart( <span class="keywordtype">int</span> msec )
<a name="l00433"></a>00433 {
<a name="l00434"></a>00434 timer->start( msec, <span class="keyword">true</span> );
<a name="l00435"></a>00435 }
<a name="l00436"></a>00436
<a name="l00437"></a>00437
<a name="l00438"></a>00438 <span class="keywordtype">void</span> Modem::receiveXModem( <span class="keywordtype">bool</span> crc )
<a name="l00439"></a>00439 {
<a name="l00440"></a>00440 disconnect( sn, 0, <span class="keyword">this</span>, 0 );
<a name="l00441"></a>00441 connect( sn, SIGNAL( activated( <span class="keywordtype">int</span> ) ), SLOT( readXChar( <span class="keywordtype">int</span> ) ) );
<a name="l00442"></a>00442
<a name="l00443"></a>00443 xcrc = crc;
<a name="l00444"></a>00444
<a name="l00445"></a>00445 <span class="keywordflow">if</span> ( xcrc ) {
<a name="l00446"></a>00446 writeChar( <span class="charliteral">'C'</span> );
<a name="l00447"></a>00447 xstate = 1;
<a name="l00448"></a>00448 timerStart( 3000 );
<a name="l00449"></a>00449 } <span class="keywordflow">else</span> {
<a name="l00450"></a>00450 writeChar( CNAK );
<a name="l00451"></a>00451 xstate = 5;
<a name="l00452"></a>00452 timerStart( 10000 );
<a name="l00453"></a>00453 }
<a name="l00454"></a>00454
<a name="l00455"></a>00455 xblock = 1;
<a name="l00456"></a>00456 }
<a name="l00457"></a>00457
<a name="l00458"></a>00458
<a name="l00459"></a>00459 <span class="keywordtype">void</span> Modem::abortXModem()
<a name="l00460"></a>00460 {
<a name="l00461"></a>00461 timer->stop();
<a name="l00462"></a>00462 writeChar( CCAN );
<a name="l00463"></a>00463 xreset();
<a name="l00464"></a>00464 emit xmodemDone( <span class="keyword">false</span> );
<a name="l00465"></a>00465 }
<a name="l00466"></a>00466
<a name="l00467"></a>00467
<a name="l00468"></a>00468 <span class="keywordtype">void</span> Modem::timerDone()
<a name="l00469"></a>00469 {
<a name="l00470"></a>00470 <span class="preprocessor">#ifdef MODEM_DEBUG</span>
<a name="l00471"></a>00471 <span class="preprocessor"></span> fprintf( stderr, <span class="stringliteral">"Modem: timeout, xstate = %d.\n"</span>, xstate );
<a name="l00472"></a>00472 <span class="preprocessor">#endif</span>
<a name="l00473"></a>00473 <span class="preprocessor"></span>
<a name="l00474"></a>00474 <span class="keywordflow">switch</span> ( xstate ) {
<a name="l00475"></a>00475 <span class="keywordflow">case</span> 0: <span class="comment">/* non-XModem mode */</span>
<a name="l00476"></a>00476 emit timeout();
<a name="l00477"></a>00477 <span class="keywordflow">break</span>;
<a name="l00478"></a>00478
<a name="l00479"></a>00479 <span class="keywordflow">case</span> 1: <span class="comment">/* 1st 'C' sent */</span>
<a name="l00480"></a>00480 <span class="keywordflow">case</span> 2: <span class="comment">/* 2nd 'C' sent */</span>
<a name="l00481"></a>00481 <span class="keywordflow">case</span> 3: <span class="comment">/* 3rd 'C' sent */</span>
<a name="l00482"></a>00482 writeChar( <span class="charliteral">'C'</span> );
<a name="l00483"></a>00483 xstate++;
<a name="l00484"></a>00484 timerStart( 1000 ); <span class="comment">/* Should be 3000 in original XModem */</span>
<a name="l00485"></a>00485 <span class="keywordflow">break</span>;
<a name="l00486"></a>00486
<a name="l00487"></a>00487 <span class="keywordflow">case</span> 4: <span class="comment">/* 4th 'C' sent */</span>
<a name="l00488"></a>00488 xcrc = <span class="keyword">false</span>;
<a name="l00489"></a>00489
<a name="l00490"></a>00490 <span class="keywordflow">case</span> 5: <span class="comment">/* 1st <NAK> sent */</span>
<a name="l00491"></a>00491 <span class="keywordflow">case</span> 6: <span class="comment">/* 2nd <NAK> sent */</span>
<a name="l00492"></a>00492 <span class="keywordflow">case</span> 7: <span class="comment">/* 3rd <NAK> sent */</span>
<a name="l00493"></a>00493 <span class="keywordflow">case</span> 8: <span class="comment">/* 4th <NAK> sent */</span>
<a name="l00494"></a>00494 <span class="keywordflow">case</span> 9: <span class="comment">/* 5th <NAK> sent */</span>
<a name="l00495"></a>00495 writeChar( CNAK );
<a name="l00496"></a>00496 xstate++;
<a name="l00497"></a>00497 timerStart( 1000 ); <span class="comment">/* Should be 10000 in original XModem */</span>
<a name="l00498"></a>00498 <span class="keywordflow">break</span>;
<a name="l00499"></a>00499
<a name="l00500"></a>00500 <span class="keywordflow">case</span> 10: <span class="comment">/* 6th <NAK> sent */</span>
<a name="l00501"></a>00501 xreset();
<a name="l00502"></a>00502 emit xmodemDone( <span class="keyword">false</span> );
<a name="l00503"></a>00503 <span class="keywordflow">break</span>;
<a name="l00504"></a>00504
<a name="l00505"></a>00505 <span class="keywordflow">default</span>: <span class="comment">/* pending XModem block */</span>
<a name="l00506"></a>00506 writeChar( CNAK );
<a name="l00507"></a>00507 xstate = 5;
<a name="l00508"></a>00508 timerStart( 1000 ); <span class="comment">/* Should be 10000 in original XModem */</span>
<a name="l00509"></a>00509 }
<a name="l00510"></a>00510 }
<a name="l00511"></a>00511
<a name="l00512"></a>00512
<a name="l00513"></a>00513 <span class="keywordtype">void</span> Modem::readChar( <span class="keywordtype">int</span> )
<a name="l00514"></a>00514 {
<a name="l00515"></a>00515 uchar c;
<a name="l00516"></a>00516
<a name="l00517"></a>00517
<a name="l00518"></a>00518 <span class="keywordflow">while</span> ( read( fd, (<span class="keywordtype">void</span> *) &c, 1 ) == 1 ) {
<a name="l00519"></a>00519 <span class="keywordflow">if</span> ( c == <span class="charliteral">'\n'</span> ) {
<a name="l00520"></a>00520 buffer[ bufpos ] = 0;
<a name="l00521"></a>00521 bufpos = 0;
<a name="l00522"></a>00522 emit gotLine( (<span class="keyword">const</span> <span class="keywordtype">char</span> *) buffer );
<a name="l00523"></a>00523 <span class="keywordflow">break</span>;
<a name="l00524"></a>00524 } <span class="keywordflow">else</span>
<a name="l00525"></a>00525 <span class="keywordflow">if</span> ( ( bufpos < 1000 ) && ( c != <span class="charliteral">'\r'</span> ) )
<a name="l00526"></a>00526 buffer[ bufpos++ ] = c;
<a name="l00527"></a>00527 }
<a name="l00528"></a>00528 }
<a name="l00529"></a>00529
<a name="l00530"></a>00530
<a name="l00531"></a>00531 <span class="keywordtype">void</span> Modem::readXChar( <span class="keywordtype">int</span> )
<a name="l00532"></a>00532 {
<a name="l00533"></a>00533 uchar c;
<a name="l00534"></a>00534 <span class="keyword">static</span> uchar crc_hi, block, cblock;
<a name="l00535"></a>00535
<a name="l00536"></a>00536
<a name="l00537"></a>00537 <span class="keywordflow">while</span> ( read( fd, (<span class="keywordtype">void</span> *) &c, 1 ) == 1 ) {
<a name="l00538"></a>00538 <span class="keywordflow">switch</span> ( xstate ) {
<a name="l00539"></a>00539 <span class="keywordflow">case</span> 1: <span class="comment">/* 1st 'C' sent */</span>
<a name="l00540"></a>00540 <span class="keywordflow">case</span> 2: <span class="comment">/* 2nd 'C' sent */</span>
<a name="l00541"></a>00541 <span class="keywordflow">case</span> 3: <span class="comment">/* 3rd 'C' sent */</span>
<a name="l00542"></a>00542 <span class="keywordflow">case</span> 4: <span class="comment">/* 4th 'C' sent */</span>
<a name="l00543"></a>00543 <span class="keywordflow">case</span> 5: <span class="comment">/* 1st <NAK> sent */</span>
<a name="l00544"></a>00544 <span class="keywordflow">case</span> 6: <span class="comment">/* 2nd <NAK> sent */</span>
<a name="l00545"></a>00545 <span class="keywordflow">case</span> 7: <span class="comment">/* 3rd <NAK> sent */</span>
<a name="l00546"></a>00546 <span class="keywordflow">case</span> 8: <span class="comment">/* 4th <NAK> sent */</span>
<a name="l00547"></a>00547 <span class="keywordflow">case</span> 9: <span class="comment">/* 5th <NAK> sent */</span>
<a name="l00548"></a>00548 <span class="keywordflow">case</span> 10: <span class="comment">/* 6th <NAK> sent */</span>
<a name="l00549"></a>00549 <span class="keywordflow">if</span> ( c == CSOH ) {
<a name="l00550"></a>00550 timerStart( 1000 );
<a name="l00551"></a>00551 xsize = 128;
<a name="l00552"></a>00552 xstate = 11;
<a name="l00553"></a>00553 } <span class="keywordflow">else</span>
<a name="l00554"></a>00554 <span class="keywordflow">if</span> ( c == CSTX ) {
<a name="l00555"></a>00555 timerStart( 1000 );
<a name="l00556"></a>00556 xsize = 1024;
<a name="l00557"></a>00557 xstate = 11;
<a name="l00558"></a>00558 } <span class="keywordflow">else</span>
<a name="l00559"></a>00559 <span class="keywordflow">if</span> ( c == CEOT ) {
<a name="l00560"></a>00560 timer->stop();
<a name="l00561"></a>00561 writeChar( CACK );
<a name="l00562"></a>00562 xreset();
<a name="l00563"></a>00563 emit xmodemDone( <span class="keyword">true</span> );
<a name="l00564"></a>00564 } <span class="keywordflow">else</span>
<a name="l00565"></a>00565 timerStart( 1000 );
<a name="l00566"></a>00566 <span class="keywordflow">break</span>;
<a name="l00567"></a>00567
<a name="l00568"></a>00568 <span class="keywordflow">case</span> 11: <span class="comment">/* <SOH> or <STX> received */</span>
<a name="l00569"></a>00569 timerStart( 1000 );
<a name="l00570"></a>00570 block = c;
<a name="l00571"></a>00571 xstate++;
<a name="l00572"></a>00572 <span class="keywordflow">break</span>;
<a name="l00573"></a>00573
<a name="l00574"></a>00574 <span class="keywordflow">case</span> 12: <span class="comment">/* block number received */</span>
<a name="l00575"></a>00575 timerStart( 1000 );
<a name="l00576"></a>00576 cblock = c;
<a name="l00577"></a>00577 xstate++;
<a name="l00578"></a>00578 bufpos = 0;
<a name="l00579"></a>00579 <span class="keywordflow">break</span>;
<a name="l00580"></a>00580
<a name="l00581"></a>00581 <span class="keywordflow">case</span> 13: <span class="comment">/* complement block number received */</span>
<a name="l00582"></a>00582 timerStart( 1000 );
<a name="l00583"></a>00583 buffer[ bufpos++ ] = c;
<a name="l00584"></a>00584 <span class="keywordflow">if</span> ( bufpos == xsize ) {
<a name="l00585"></a>00585 bufpos = 0;
<a name="l00586"></a>00586 xstate++;
<a name="l00587"></a>00587 <span class="keywordflow">if</span> ( !xcrc )
<a name="l00588"></a>00588 xstate++;
<a name="l00589"></a>00589 }
<a name="l00590"></a>00590 <span class="keywordflow">break</span>;
<a name="l00591"></a>00591
<a name="l00592"></a>00592 <span class="keywordflow">case</span> 14: <span class="comment">/* data block received */</span>
<a name="l00593"></a>00593 timerStart( 1000 );
<a name="l00594"></a>00594 crc_hi = c;
<a name="l00595"></a>00595 xstate++;
<a name="l00596"></a>00596 <span class="keywordflow">break</span>;
<a name="l00597"></a>00597
<a name="l00598"></a>00598 <span class="keywordflow">case</span> 15: <span class="comment">/* crc high-byte received */</span>
<a name="l00599"></a>00599 timerStart( 10000 );
<a name="l00600"></a>00600 xstate = 4;
<a name="l00601"></a>00601 <span class="keywordflow">if</span> ( (uchar) ( block ^ cblock ) != 0xff ) {
<a name="l00602"></a>00602 writeChar( CNAK );
<a name="l00603"></a>00603 <span class="keywordflow">break</span>;
<a name="l00604"></a>00604 }
<a name="l00605"></a>00605 <span class="keywordflow">if</span> ( block+1 == xblock ) {
<a name="l00606"></a>00606 writeChar( CACK );
<a name="l00607"></a>00607 <span class="keywordflow">break</span>;
<a name="l00608"></a>00608 }
<a name="l00609"></a>00609 <span class="keywordflow">if</span> ( block != xblock ) {
<a name="l00610"></a>00610 timer->stop();
<a name="l00611"></a>00611 writeChar( CCAN );
<a name="l00612"></a>00612 xreset();
<a name="l00613"></a>00613 emit xmodemDone( <span class="keyword">false</span> );
<a name="l00614"></a>00614 <span class="keywordflow">break</span>;
<a name="l00615"></a>00615 }
<a name="l00616"></a>00616 <span class="keywordflow">if</span> ( xcrc ) {
<a name="l00617"></a>00617 <span class="keywordflow">if</span> ( ( (ushort) crc_hi << 8 | (ushort) c ) != calcCRC() ) {
<a name="l00618"></a>00618 writeChar( CNAK );
<a name="l00619"></a>00619 <span class="keywordflow">break</span>;
<a name="l00620"></a>00620 }
<a name="l00621"></a>00621 } <span class="keywordflow">else</span> {
<a name="l00622"></a>00622 <span class="keywordflow">if</span> ( c != calcChecksum() ) {
<a name="l00623"></a>00623 writeChar( CNAK );
<a name="l00624"></a>00624 <span class="keywordflow">break</span>;
<a name="l00625"></a>00625 }
<a name="l00626"></a>00626 }
<a name="l00627"></a>00627 writeChar( CACK );
<a name="l00628"></a>00628 xblock++;
<a name="l00629"></a>00629 emit gotXBlock( buffer, xsize );
<a name="l00630"></a>00630 <span class="keywordflow">break</span>;
<a name="l00631"></a>00631
<a name="l00632"></a>00632 <span class="keywordflow">default</span>:
<a name="l00633"></a>00633 <span class="keywordflow">break</span>;
<a name="l00634"></a>00634 }
<a name="l00635"></a>00635 }
<a name="l00636"></a>00636 }
<a name="l00637"></a>00637
<a name="l00638"></a>00638
<a name="l00639"></a>00639 <span class="keywordtype">void</span> Modem::init()
<a name="l00640"></a>00640 {
<a name="l00641"></a>00641 is_locked = <span class="keyword">false</span>;
<a name="l00642"></a>00642
<a name="l00643"></a>00643 fd = 0;
<a name="l00644"></a>00644 sn = 0;
<a name="l00645"></a>00645
<a name="l00646"></a>00646 cspeed = B38400;
<a name="l00647"></a>00647
<a name="l00648"></a>00648 <span class="comment">// No flow control</span>
<a name="l00649"></a>00649 cflag = CS8 | CREAD | CLOCAL;
<a name="l00650"></a>00650 <span class="comment">// cflag = CS8 | CREAD | CLOCAL | CRTSCTS;</span>
<a name="l00651"></a>00651
<a name="l00652"></a>00652 bufpos = 0;
<a name="l00653"></a>00653 }
<a name="l00654"></a>00654
<a name="l00655"></a>00655
<a name="l00656"></a>00656 <span class="keywordtype">void</span> Modem::xreset()
<a name="l00657"></a>00657 {
<a name="l00658"></a>00658 bufpos = 0;
<a name="l00659"></a>00659
<a name="l00660"></a>00660 xstate = 0;
<a name="l00661"></a>00661 xcrc = <span class="keyword">false</span>;
<a name="l00662"></a>00662 xblock = 0;
<a name="l00663"></a>00663 xsize = 0;
<a name="l00664"></a>00664
<a name="l00665"></a>00665 <span class="keywordflow">if</span> ( sn ) {
<a name="l00666"></a>00666 disconnect( sn, 0, <span class="keyword">this</span>, 0 );
<a name="l00667"></a>00667 connect( sn, SIGNAL( activated( <span class="keywordtype">int</span> ) ), SLOT( readChar( <span class="keywordtype">int</span> ) ) );
<a name="l00668"></a>00668 }
<a name="l00669"></a>00669 }
<a name="l00670"></a>00670
<a name="l00671"></a>00671
<a name="l00672"></a>00672 uchar Modem::calcChecksum()
<a name="l00673"></a>00673 {
<a name="l00674"></a>00674 <span class="keywordtype">int</span> i;
<a name="l00675"></a>00675 uchar c = 0;
<a name="l00676"></a>00676
<a name="l00677"></a>00677
<a name="l00678"></a>00678 <span class="keywordflow">for</span> ( i = 0; i < xsize; i++ )
<a name="l00679"></a>00679 c += buffer[ i ];
<a name="l00680"></a>00680
<a name="l00681"></a>00681 <span class="keywordflow">return</span> c;
<a name="l00682"></a>00682 }
<a name="l00683"></a>00683
<a name="l00684"></a>00684
<a name="l00685"></a>00685 ushort Modem::calcCRC()
<a name="l00686"></a>00686 {
<a name="l00687"></a>00687 <span class="keywordtype">int</span> i, j;
<a name="l00688"></a>00688 ushort c = 0;
<a name="l00689"></a>00689
<a name="l00690"></a>00690
<a name="l00691"></a>00691 <span class="keywordflow">for</span> ( i = 0; i < xsize; i++ ) {
<a name="l00692"></a>00692 c ^= (ushort) buffer[ i ] << 8;
<a name="l00693"></a>00693 <span class="keywordflow">for</span> ( j = 0; j < 8; j++ )
<a name="l00694"></a>00694 <span class="keywordflow">if</span> ( c & 0x8000 )
<a name="l00695"></a>00695 c = c << 1 ^ 0x1021;
<a name="l00696"></a>00696 <span class="keywordflow">else</span>
<a name="l00697"></a>00697 c <<= 1;
<a name="l00698"></a>00698 }
<a name="l00699"></a>00699
<a name="l00700"></a>00700 <span class="keywordflow">return</span> c;
<a name="l00701"></a>00701 }
<a name="l00702"></a>00702
<a name="l00703"></a>00703 <span class="preprocessor">#include "modem.moc"</span>
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