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<h1>winscard_msg_srv.c File Reference</h1>
<p>client/server communication (on the server side only)
<a href="#_details">More...</a></p>
<code>#include "config.h"</code><br/>
<code>#include <fcntl.h></code><br/>
<code>#include <unistd.h></code><br/>
<code>#include <sys/types.h></code><br/>
<code>#include <sys/stat.h></code><br/>
<code>#include <sys/socket.h></code><br/>
<code>#include <sys/time.h></code><br/>
<code>#include <sys/un.h></code><br/>
<code>#include <sys/ioctl.h></code><br/>
<code>#include <errno.h></code><br/>
<code>#include <stdio.h></code><br/>
<code>#include <time.h></code><br/>
<code>#include <string.h></code><br/>
<code>#include "misc.h"</code><br/>
<code>#include "<a class="el" href="pcscd_8h_source.html">pcscd.h</a>"</code><br/>
<code>#include "<a class="el" href="winscard_8h_source.html">winscard.h</a>"</code><br/>
<code>#include "<a class="el" href="debuglog_8h_source.html">debuglog.h</a>"</code><br/>
<code>#include "<a class="el" href="winscard__msg_8h_source.html">winscard_msg.h</a>"</code><br/>
<code>#include "<a class="el" href="sys__generic_8h_source.html">sys_generic.h</a>"</code><br/>
<div class="dynheader">
Include dependency graph for winscard_msg_srv.c:</div>
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<p><a href="winscard__msg__srv_8c_source.html">Go to the source code of this file.</a></p>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td colspan="2"><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static int </td><td class="memItemRight" valign="bottom"><a class="el" href="winscard__msg__srv_8c.html#a9daf00a9f46d3e86afb2ab1e17470547">SHMProcessCommonChannelRequest</a> (uint32_t *pdwClientID)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Accepts a Client connection. <a href="#a9daf00a9f46d3e86afb2ab1e17470547"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">INTERNAL int32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="winscard__msg__srv_8c.html#a7f73b8df9dc165deb9775d35cff8973d">SHMInitializeCommonSegment</a> (void)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Prepares the communication channel used by the server to talk to the clients. <a href="#a7f73b8df9dc165deb9775d35cff8973d"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">INTERNAL int32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="winscard__msg__srv_8c.html#a0bba564b08a9b2044ccd41580d6d7566">SHMProcessEventsServer</a> (uint32_t *pdwClientID)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Looks for messages sent by clients. <a href="#a0bba564b08a9b2044ccd41580d6d7566"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a7b9db088df74f87199e70b838298bf6d"></a><!-- doxytag: member="winscard_msg_srv.c::SHMProcessEventsContext" ref="a7b9db088df74f87199e70b838298bf6d" args="(uint32_t dwClientID, psharedSegmentMsg msgStruct)" -->
INTERNAL int32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="winscard__msg__srv_8c.html#a7b9db088df74f87199e70b838298bf6d">SHMProcessEventsContext</a> (uint32_t dwClientID, <a class="el" href="structrxSharedSegment.html">psharedSegmentMsg</a> msgStruct)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Called by <code><a class="el" href="winscard__svc_8c.html#a10a1e7f5d0806084134a299398dbc81a" title="Handles messages received from Clients.">ContextThread()</a></code>. <br/></td></tr>
<tr><td colspan="2"><h2>Variables</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a840eb2cc63fe5b38ec8edb835bc7c40c"></a><!-- doxytag: member="winscard_msg_srv.c::commonSocket" ref="a840eb2cc63fe5b38ec8edb835bc7c40c" args="" -->
static int </td><td class="memItemRight" valign="bottom"><a class="el" href="winscard__msg__srv_8c.html#a840eb2cc63fe5b38ec8edb835bc7c40c">commonSocket</a> = 0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Socket to a file, used for clients-server comminication. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a7c1bcbba3beb47ba1f62a370bd7ec32c"></a><!-- doxytag: member="winscard_msg_srv.c::AraKiri" ref="a7c1bcbba3beb47ba1f62a370bd7ec32c" args="" -->
char </td><td class="memItemRight" valign="bottom"><b>AraKiri</b></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aad78ba97e2ad3cb9dd87839f67862681"></a><!-- doxytag: member="winscard_msg_srv.c::ReCheckSerialReaders" ref="aad78ba97e2ad3cb9dd87839f67862681" args="" -->
char </td><td class="memItemRight" valign="bottom"><b>ReCheckSerialReaders</b></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static const char * </td><td class="memItemRight" valign="bottom"><b>CommandsText</b> []</td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>client/server communication (on the server side only) </p>
<p>A file based socket (<code>commonSocket</code>) is used to send/receive only messages among clients and server.<br/>
The messages' data are passed throw a memory mapped file: <code>sharedSegmentMsg</code>. </p>
<p>Definition in file <a class="el" href="winscard__msg__srv_8c_source.html">winscard_msg_srv.c</a>.</p>
<hr/><h2>Function Documentation</h2>
<a class="anchor" id="a7f73b8df9dc165deb9775d35cff8973d"></a><!-- doxytag: member="winscard_msg_srv.c::SHMInitializeCommonSegment" ref="a7f73b8df9dc165deb9775d35cff8973d" args="(void)" -->
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<td class="memname">INTERNAL int32_t SHMInitializeCommonSegment </td>
<td>(</td>
<td class="paramtype">void </td>
<td class="paramname"></td>
<td> ) </td>
<td></td>
</tr>
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<div class="memdoc">
<p>Prepares the communication channel used by the server to talk to the clients. </p>
<p>This is called by the server to create a socket for local IPC with the clients. The socket is associated to the file <code>PCSCLITE_CSOCK_NAME</code>. Each client will open a connection to this socket.</p>
<dl class="return"><dt><b>Returns:</b></dt><dd>Error code. </dd></dl>
<dl><dt><b>Return values:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>0</em> </td><td>Success </td></tr>
<tr><td valign="top"></td><td valign="top"><em>-1</em> </td><td>Can not create the socket. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>-1</em> </td><td>Can not bind the socket to the file <code>PCSCLITE_CSOCK_NAME</code>. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>-1</em> </td><td>Can not put the socket in listen mode. </td></tr>
</table>
</dd>
</dl>
<p>Definition at line <a class="el" href="winscard__msg__srv_8c_source.html#l00133">133</a> of file <a class="el" href="winscard__msg__srv_8c_source.html">winscard_msg_srv.c</a>.</p>
<p>References <a class="el" href="winscard__msg__srv_8c_source.html#l00048">commonSocket</a>, <a class="el" href="winscard__msg_8c_source.html#l00478">SHMCleanupSharedSegment()</a>, and <a class="el" href="sys__unix_8c_source.html#l00157">SYS_RemoveFile()</a>.</p>
<p>Referenced by <a class="el" href="pcscdaemon_8c_source.html#l00080">SVCServiceRunLoop()</a>.</p>
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<a class="anchor" id="a9daf00a9f46d3e86afb2ab1e17470547"></a><!-- doxytag: member="winscard_msg_srv.c::SHMProcessCommonChannelRequest" ref="a9daf00a9f46d3e86afb2ab1e17470547" args="(uint32_t *pdwClientID)" -->
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<td class="memname">static int SHMProcessCommonChannelRequest </td>
<td>(</td>
<td class="paramtype">uint32_t * </td>
<td class="paramname"> <em>pdwClientID</em></td>
<td> ) </td>
<td><code> [static]</code></td>
</tr>
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<div class="memdoc">
<p>Accepts a Client connection. </p>
<p>Called by <code><a class="el" href="winscard__msg_8h.html#a0dcf683dc7824fb581a5aa6fe99f09ce" title="Looks for messages sent by clients.">SHMProcessEventsServer()</a></code>.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><tt>[out]</tt> </td><td valign="top"><em>pdwClientID</em> </td><td>Connection ID used to reference the Client.</td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>Error code. </dd></dl>
<dl><dt><b>Return values:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>0</em> </td><td>Success. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>-1</em> </td><td>Can not establish the connection. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>-1</em> </td><td>Can not set the connection to non-blocking mode. </td></tr>
</table>
</dd>
</dl>
<p>Definition at line <a class="el" href="winscard__msg__srv_8c_source.html#l00087">87</a> of file <a class="el" href="winscard__msg__srv_8c_source.html">winscard_msg_srv.c</a>.</p>
<p>References <a class="el" href="winscard__msg__srv_8c_source.html#l00048">commonSocket</a>, and <a class="el" href="sys__unix_8c_source.html#l00143">SYS_CloseFile()</a>.</p>
<p>Referenced by <a class="el" href="winscard__msg__srv_8c_source.html#l00193">SHMProcessEventsServer()</a>.</p>
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<a class="anchor" id="a0bba564b08a9b2044ccd41580d6d7566"></a><!-- doxytag: member="winscard_msg_srv.c::SHMProcessEventsServer" ref="a0bba564b08a9b2044ccd41580d6d7566" args="(uint32_t *pdwClientID)" -->
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<td class="memname">INTERNAL int32_t SHMProcessEventsServer </td>
<td>(</td>
<td class="paramtype">uint32_t * </td>
<td class="paramname"> <em>pdwClientID</em></td>
<td> ) </td>
<td></td>
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<p>Looks for messages sent by clients. </p>
<p>This is called by the Server's function <code><a class="el" href="pcscdaemon_8c.html#aa4c7ad16505a34733683cf8c08241783" title="The Server's Message Queue Listener function.">SVCServiceRunLoop()</a></code>.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><tt>[out]</tt> </td><td valign="top"><em>pdwClientID</em> </td><td>Connection ID used to reference the Client.</td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>Error code. </dd></dl>
<dl><dt><b>Return values:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>0</em> </td><td>Success. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>-1</em> </td><td>Error accessing the communication channel. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>-1</em> </td><td>Can not set the connection to non-blocking mode. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>2</em> </td><td>Timeout. </td></tr>
</table>
</dd>
</dl>
<p>Definition at line <a class="el" href="winscard__msg__srv_8c_source.html#l00193">193</a> of file <a class="el" href="winscard__msg__srv_8c_source.html">winscard_msg_srv.c</a>.</p>
<p>References <a class="el" href="winscard__msg__srv_8c_source.html#l00048">commonSocket</a>, and <a class="el" href="winscard__msg__srv_8c_source.html#l00087">SHMProcessCommonChannelRequest()</a>.</p>
<p>Referenced by <a class="el" href="pcscdaemon_8c_source.html#l00080">SVCServiceRunLoop()</a>.</p>
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<hr/><h2>Variable Documentation</h2>
<a class="anchor" id="a7e0939c34e53323d54001986fe0ef3d8"></a><!-- doxytag: member="winscard_msg_srv.c::CommandsText" ref="a7e0939c34e53323d54001986fe0ef3d8" args="[]" -->
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<td class="memname">const char* CommandsText[]<code> [static]</code></td>
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<b>Initial value:</b><div class="fragment"><pre class="fragment"> {
<span class="stringliteral">"CMD_VERSION"</span>,
<span class="stringliteral">"ESTABLISH_CONTEXT"</span>,
<span class="stringliteral">"RELEASE_CONTEXT"</span>,
<span class="stringliteral">"LIST_READERS"</span>,
<span class="stringliteral">"CONNECT"</span>,
<span class="stringliteral">"RECONNECT"</span>,
<span class="stringliteral">"DISCONNECT"</span>,
<span class="stringliteral">"BEGIN_TRANSACTION"</span>,
<span class="stringliteral">"END_TRANSACTION"</span>,
<span class="stringliteral">"TRANSMIT"</span>,
<span class="stringliteral">"CONTROL"</span>,
<span class="stringliteral">"STATUS"</span>,
<span class="stringliteral">"GET_STATUS_CHANGE"</span>,
<span class="stringliteral">"CANCEL"</span>,
<span class="stringliteral">"CANCEL_TRANSACTION"</span>,
<span class="stringliteral">"GET_ATTRIB"</span>,
<span class="stringliteral">"SET_ATTRIB"</span>,
<span class="stringliteral">"TRANSMIT_EXTENDED"</span>,
<span class="stringliteral">"CONTROL_EXTENDED"</span>,
<span class="stringliteral">"NULL"</span>
}
</pre></div>
<p>Definition at line <a class="el" href="winscard__msg__srv_8c_source.html#l00052">52</a> of file <a class="el" href="winscard__msg__srv_8c_source.html">winscard_msg_srv.c</a>.</p>
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