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doxygen="_cgi:http://www.nevrax.org/cgi-bin/nel-search.cgi" href="http://www.nevrax.org/cgi-bin/nel-search.cgi">Search</a> </center> +<hr><h1>listen_sock.cpp</h1><a href="listen__sock_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 +00007 <font class="comment">/* Copyright, 2000 Nevrax Ltd.</font> +00008 <font class="comment"> *</font> +00009 <font class="comment"> * This file is part of NEVRAX NEL.</font> +00010 <font class="comment"> * NEVRAX NEL is free software; you can redistribute it and/or modify</font> +00011 <font class="comment"> * it under the terms of the GNU General Public License as published by</font> +00012 <font class="comment"> * the Free Software Foundation; either version 2, or (at your option)</font> +00013 <font class="comment"> * any later version.</font> +00014 <font class="comment"></font> +00015 <font class="comment"> * NEVRAX NEL is distributed in the hope that it will be useful, but</font> +00016 <font class="comment"> * WITHOUT ANY WARRANTY; without even the implied warranty of</font> +00017 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font> +00018 <font class="comment"> * General Public License for more details.</font> +00019 <font class="comment"></font> +00020 <font class="comment"> * You should have received a copy of the GNU General Public License</font> +00021 <font class="comment"> * along with NEVRAX NEL; see the file COPYING. If not, write to the</font> +00022 <font class="comment"> * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,</font> +00023 <font class="comment"> * MA 02111-1307, USA.</font> +00024 <font class="comment"> */</font> +00025 +00026 <font class="preprocessor">#include "<a class="code" href="stdnet_8h.html">stdnet.h</a>"</font> +00027 +00028 <font class="preprocessor">#include "<a class="code" href="listen__sock_8h.html">nel/net/listen_sock.h</a>"</font> +00029 +00030 <font class="preprocessor">#ifdef NL_OS_WINDOWS</font> +00031 <font class="preprocessor"></font> +00032 <font class="preprocessor">#include <winsock2.h></font> +00033 <font class="keyword">typedef</font> <a class="code" href="types__nl_8h.html#a13">sint</a> socklen_t; +00034 +00035 <font class="preprocessor">#elif defined NL_OS_UNIX</font> +00036 <font class="preprocessor"></font> +00037 <font class="preprocessor">#include <<a class="code" href="unistd_8h.html">unistd.h</a>></font> +00038 <font class="preprocessor">#include <sys/types.h></font> +00039 <font class="preprocessor">#include <sys/socket.h></font> +00040 <font class="preprocessor">#include <netinet/in.h></font> +00041 <font class="preprocessor">#include <arpa/inet.h></font> +00042 <font class="preprocessor">#include <netdb.h></font> +00043 <font class="preprocessor">#include <errno.h></font> +00044 <font class="preprocessor">#include <fcntl.h></font> +00045 <font class="preprocessor">#define SOCKET_ERROR -1</font> +00046 <font class="preprocessor"></font><font class="preprocessor">#define INVALID_SOCKET -1</font> +00047 <font class="preprocessor"></font><font class="keyword">typedef</font> <font class="keywordtype">int</font> SOCKET; +00048 +00049 <font class="preprocessor">#endif</font> +00050 <font class="preprocessor"></font> +00051 +00052 <font class="keyword">using</font> <font class="keyword">namespace </font>std; +00053 +00054 +00055 <font class="keyword">namespace </font>NLNET +00056 { +00057 +00058 +00059 <font class="comment">/*</font> +00060 <font class="comment"> * Constructor</font> +00061 <font class="comment"> */</font> +<a name="l00062"></a><a class="code" href="classNLNET_1_1CListenSock.html#a0">00062</a> CListenSock::CListenSock() : CTcpSock(), _Bound( false ) +00063 { +00064 <font class="comment">// Create socket</font> +00065 <a class="code" href="classNLNET_1_1CSock.html#b2">createSocket</a>( SOCK_STREAM, IPPROTO_TCP ); +00066 +00068 <a class="code" href="classNLNET_1_1CListenSock.html#z341_2">setBacklog</a>( -1 ); +00069 } +00070 +00071 +00072 <font class="comment">/*</font> +00073 <font class="comment"> * Prepares to receive connections on a specified port</font> +00074 <font class="comment"> */</font> +<a name="l00075"></a><a class="code" href="classNLNET_1_1CListenSock.html#z341_0">00075</a> <font class="keywordtype">void</font> CListenSock::init( <a class="code" href="types__nl_8h.html#a8">uint16</a> port ) +00076 { +00077 <font class="comment">// Use any address</font> +00078 CInetAddress localaddr; <font class="comment">// By default, INETADDR_ANY (useful for gateways that have several ip addresses)</font> +00079 localaddr.setPort( port ); +00080 <a class="code" href="classNLNET_1_1CListenSock.html#z341_0">init</a>( localaddr ); +00081 +00082 <font class="comment">// Now set the address visible from outside</font> +00083 <a class="code" href="classNLNET_1_1CSock.html#n1">_LocalAddr</a> = CInetAddress::localHost(); +00084 <a class="code" href="classNLNET_1_1CSock.html#n1">_LocalAddr</a>.setPort( port ); +00085 <a class="code" href="debug_8h.html#a0">nldebug</a>( <font class="stringliteral">"LNETL0: Socket %d listen socket is at %s"</font>, <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, <a class="code" href="classNLNET_1_1CSock.html#n1">_LocalAddr</a>.asString().c_str() ); +00086 } +00087 +00088 +00089 <font class="comment">/*</font> +00090 <font class="comment"> * Prepares to receive connections on a specified address/port (useful when the host has several addresses)</font> +00091 <font class="comment"> */</font> +<a name="l00092"></a><a class="code" href="classNLNET_1_1CListenSock.html#z341_1">00092</a> <font class="keywordtype">void</font> CListenSock::init( <font class="keyword">const</font> CInetAddress& addr ) +00093 { +00094 <font class="keywordflow">if</font> ( ! addr.isValid() ) +00095 { +00096 <a class="code" href="debug_8h.html#a0">nldebug</a>( <font class="stringliteral">"LNETL0: Binding listen socket to any address, port %hu"</font>, addr.port() ); +00097 } +00098 +00099 <font class="preprocessor">#ifndef NL_OS_WINDOWS</font> +00100 <font class="preprocessor"></font> <font class="comment">// Set Reuse Address On (does not work on Win98 and is useless on Win2000)</font> +00101 <font class="keywordtype">int</font> value = <font class="keyword">true</font>; +00102 <font class="keywordflow">if</font> ( setsockopt( <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, SOL_SOCKET, SO_REUSEADDR, &value, <font class="keyword">sizeof</font>(value) ) == SOCKET_ERROR ) +00103 { +00104 <font class="keywordflow">throw</font> ESocket( <font class="stringliteral">"ReuseAddr failed"</font> ); +00105 } +00106 <font class="preprocessor">#endif</font> +00107 <font class="preprocessor"></font> +00108 <font class="comment">// Bind socket to port </font> +00109 <font class="keywordflow">if</font> ( ::bind( <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, (<font class="keyword">const</font> sockaddr *)addr.sockAddr(), <font class="keyword">sizeof</font>(sockaddr_in) ) != 0 ) +00110 { +00111 <font class="keywordflow">throw</font> ESocket( <font class="stringliteral">"Unable to bind listen socket to port"</font> ); +00112 } +00113 <a class="code" href="classNLNET_1_1CSock.html#n1">_LocalAddr</a> = addr; +00114 <a class="code" href="classNLNET_1_1CListenSock.html#o0">_Bound</a> = <font class="keyword">true</font>; +00115 +00116 <font class="comment">// Listen</font> +00117 <font class="keywordflow">if</font> ( ::listen( <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, <a class="code" href="classNLNET_1_1CListenSock.html#o1">_BackLog</a> ) != 0 ) <font class="comment">// SOMAXCONN = maximum length of the queue of pending connections</font> +00118 { +00119 <font class="keywordflow">throw</font> ESocket( <font class="stringliteral">"Unable to listen on specified port"</font> ); +00120 } +00121 <font class="comment">// nldebug( "LNETL0: Socket %d listening at %s", _Sock, _LocalAddr.asString().c_str() );</font> +00122 } +00123 +00124 +00125 <font class="comment">/*</font> +00126 <font class="comment"> * Accepts an incoming connection, and creates a new socket</font> +00127 <font class="comment"> */</font> +<a name="l00128"></a><a class="code" href="classNLNET_1_1CListenSock.html#a1">00128</a> CTcpSock *CListenSock::accept() +00129 { +00130 <font class="comment">// Accept connection</font> +00131 sockaddr_in saddr; +00132 socklen_t saddrlen = <font class="keyword">sizeof</font>(saddr); +00133 SOCKET newsock = ::accept( <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, (sockaddr*)&saddr, &saddrlen ); +00134 <font class="keywordflow">if</font> ( newsock == INVALID_SOCKET ) +00135 { +00136 <font class="comment">/*nlinfo( "LNETL0: Error accepting a connection");</font> +00137 <font class="comment"> // See accept() man on Linux</font> +00138 <font class="comment"> newsock = ::accept( _Sock, (sockaddr*)&saddr, &saddrlen );</font> +00139 <font class="comment"> if ( newsock == INVALID_SOCKET )*/</font> +00140 { +00141 <font class="keywordflow">throw</font> ESocket( <font class="stringliteral">"Accept returned an invalid socket"</font>); +00142 } +00143 } +00144 +00145 <font class="comment">// Construct and save a CTcpSock object</font> +00146 CInetAddress addr; +00147 addr.setSockAddr( &saddr ); +00148 <a class="code" href="debug_8h.html#a0">nldebug</a>( <font class="stringliteral">"LNETL0: Socket %d accepted an incoming connection from %s, opening socket %d"</font>, <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, addr.asString().c_str(), newsock ); +00149 <a class="code" href="classNLNET_1_1CTcpSock.html#z352_0">CTcpSock</a> *connection = <font class="keyword">new</font> <a class="code" href="classNLNET_1_1CTcpSock.html#z352_0">CTcpSock</a>( newsock, addr ); +00150 <font class="keywordflow">return</font> connection; +00151 } +00152 +00153 +00154 <font class="comment">/*</font> +00155 <font class="comment"> * Sets the number of the pending connections queue. -1 for the maximum possible value.</font> +00156 <font class="comment"> */</font> +<a name="l00157"></a><a class="code" href="classNLNET_1_1CListenSock.html#z341_2">00157</a> <font class="keywordtype">void</font> CListenSock::setBacklog( <a class="code" href="types__nl_8h.html#a13">sint</a> backlog ) +00158 { +00159 <font class="keywordflow">if</font> ( <a class="code" href="classNLNET_1_1CListenSock.html#z341_3">backlog</a> == -1 ) +00160 { +00161 <a class="code" href="classNLNET_1_1CListenSock.html#o1">_BackLog</a> = SOMAXCONN; <font class="comment">// SOMAXCONN = maximum length of the queue of pending connections</font> +00162 } +00163 <font class="keywordflow">else</font> +00164 { +00165 <a class="code" href="classNLNET_1_1CListenSock.html#o1">_BackLog</a> = <a class="code" href="classNLNET_1_1CListenSock.html#z341_3">backlog</a>; +00166 } +00167 <font class="keywordflow">if</font> ( _Bound ) +00168 { +00169 <font class="keywordflow">if</font> ( ::listen( <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, <a class="code" href="classNLNET_1_1CListenSock.html#o1">_BackLog</a> ) != 0 ) +00170 { +00171 <font class="keywordflow">throw</font> ESocket( <font class="stringliteral">"Unable to listen on specified port, while changing backlog"</font> ); +00172 } +00173 } +00174 } +00175 +00176 +00177 } <font class="comment">// NLNET</font> +</pre></div> + +<!-- footer --> +<BR><FONT Size=+5> </FONT> +</TD> +<TD WIDTH=15><IMG SRC=http://www.nevrax.org/inc/img/pixel.gif WIDTH=15 HEIGHT=15 BORDER=0 ALT=""></TD> +</TR> +</TABLE> +</BODY> +</HTML> |