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<pre><a name="line-1"></a><span class='hs-comment'>{- arch-tag: Network utilities main file
<a name="line-2"></a>Copyright (C) 2004-2008 John Goerzen <jgoerzen@complete.org>
<a name="line-3"></a>
<a name="line-4"></a>This program is free software; you can redistribute it and/or modify
<a name="line-5"></a>it under the terms of the GNU General Public License as published by
<a name="line-6"></a>the Free Software Foundation; either version 2 of the License, or
<a name="line-7"></a>(at your option) any later version.
<a name="line-8"></a>
<a name="line-9"></a>This program is distributed in the hope that it will be useful,
<a name="line-10"></a>but WITHOUT ANY WARRANTY; without even the implied warranty of
<a name="line-11"></a>MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
<a name="line-12"></a>GNU General Public License for more details.
<a name="line-13"></a>
<a name="line-14"></a>You should have received a copy of the GNU General Public License
<a name="line-15"></a>along with this program; if not, write to the Free Software
<a name="line-16"></a>Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
<a name="line-17"></a>-}</span>
<a name="line-18"></a><span class='hs-comment'>{- |
<a name="line-19"></a> Module : Network.Utils
<a name="line-20"></a> Copyright : Copyright (C) 2004-2008 John Goerzen
<a name="line-21"></a> License : GNU GPL, version 2 or above
<a name="line-22"></a>
<a name="line-23"></a> Maintainer : John Goerzen <jgoerzen@complete.org>
<a name="line-24"></a> Stability : provisional
<a name="line-25"></a> Portability: systems with networking
<a name="line-26"></a>
<a name="line-27"></a>This module provides various helpful utilities for dealing with networking
<a name="line-28"></a>
<a name="line-29"></a>Written by John Goerzen, jgoerzen\@complete.org
<a name="line-30"></a>
<a name="line-31"></a>-}</span>
<a name="line-32"></a>
<a name="line-33"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Network</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span> <span class='hs-layout'>(</span><span class='hs-varid'>niceSocketsDo</span><span class='hs-layout'>,</span> <span class='hs-varid'>connectTCP</span><span class='hs-layout'>,</span> <span class='hs-varid'>connectTCPAddr</span><span class='hs-layout'>,</span>
<a name="line-34"></a> <span class='hs-varid'>listenTCPAddr</span><span class='hs-layout'>,</span> <span class='hs-varid'>showSockAddr</span><span class='hs-layout'>)</span>
<a name="line-35"></a> <span class='hs-keyword'>where</span>
<a name="line-36"></a>
<a name="line-37"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Network</span>
<a name="line-38"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Network</span><span class='hs-varop'>.</span><span class='hs-conid'>Socket</span>
<a name="line-39"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Network</span><span class='hs-varop'>.</span><span class='hs-conid'>BSD</span>
<a name="line-40"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span>
<a name="line-41"></a><span class='hs-cpp'>#if !(defined(mingw32_HOST_OS) || defined(mingw32_TARGET_OS) || defined(__MINGW32__))</span>
<a name="line-42"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Posix</span><span class='hs-varop'>.</span><span class='hs-conid'>Signals</span>
<a name="line-43"></a><span class='hs-cpp'>#endif</span>
<a name="line-44"></a>
<a name="line-45"></a><span class='hs-comment'>{- | Sets up the system for networking. Similar to the built-in
<a name="line-46"></a>withSocketsDo (and actually, calls it), but also sets the SIGPIPE
<a name="line-47"></a>handler so that signal is ignored.
<a name="line-48"></a>
<a name="line-49"></a>Example:
<a name="line-50"></a>
<a name="line-51"></a>> main = niceSocketsDo $ do { ... }
<a name="line-52"></a>-}</span>
<a name="line-53"></a>
<a name="line-54"></a><span class='hs-comment'>-- FIXME integrate with WebCont.Util.UDP</span>
<a name="line-55"></a>
<a name="line-56"></a><a name="niceSocketsDo"></a><span class='hs-definition'>niceSocketsDo</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span>
<a name="line-57"></a><span class='hs-definition'>niceSocketsDo</span> <span class='hs-varid'>func</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-58"></a><span class='hs-cpp'>#if !(defined(mingw32_HOST_OS) || defined(mingw32_TARGET_OS) || defined(__MINGW32__))</span>
<a name="line-59"></a> <span class='hs-comment'>-- No signals on Windows anyway</span>
<a name="line-60"></a> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Posix</span><span class='hs-varop'>.</span><span class='hs-conid'>Signals</span><span class='hs-varop'>.</span><span class='hs-varid'>installHandler</span>
<a name="line-61"></a> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Posix</span><span class='hs-varop'>.</span><span class='hs-conid'>Signals</span><span class='hs-varop'>.</span><span class='hs-varid'>sigPIPE</span>
<a name="line-62"></a> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Posix</span><span class='hs-varop'>.</span><span class='hs-conid'>Signals</span><span class='hs-varop'>.</span><span class='hs-conid'>Ignore</span>
<a name="line-63"></a> <span class='hs-conid'>Nothing</span>
<a name="line-64"></a><span class='hs-cpp'>#endif</span>
<a name="line-65"></a> <span class='hs-varid'>withSocketsDo</span> <span class='hs-varid'>func</span>
<a name="line-66"></a>
<a name="line-67"></a><a name="connectTCP"></a><span class='hs-definition'>connectTCP</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>HostName</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PortNumber</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Socket</span>
<a name="line-68"></a><span class='hs-definition'>connectTCP</span> <span class='hs-varid'>host</span> <span class='hs-varid'>port</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-69"></a> <span class='hs-varid'>he</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getHostByName</span> <span class='hs-varid'>host</span>
<a name="line-70"></a> <span class='hs-varid'>connectTCPAddr</span> <span class='hs-layout'>(</span><span class='hs-conid'>SockAddrInet</span> <span class='hs-varid'>port</span> <span class='hs-layout'>(</span><span class='hs-varid'>hostAddress</span> <span class='hs-varid'>he</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-71"></a>
<a name="line-72"></a><a name="connectTCPAddr"></a><span class='hs-definition'>connectTCPAddr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SockAddr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Socket</span>
<a name="line-73"></a><span class='hs-definition'>connectTCPAddr</span> <span class='hs-varid'>addr</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-74"></a> <span class='hs-varid'>proto</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getProtocolNumber</span> <span class='hs-str'>"tcp"</span>
<a name="line-75"></a> <span class='hs-varid'>s</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>socket</span> <span class='hs-conid'>AF_INET</span> <span class='hs-conid'>Stream</span> <span class='hs-varid'>proto</span>
<a name="line-76"></a> <span class='hs-varid'>connect</span> <span class='hs-varid'>s</span> <span class='hs-varid'>addr</span>
<a name="line-77"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>s</span>
<a name="line-78"></a>
<a name="line-79"></a><a name="listenTCPAddr"></a><span class='hs-definition'>listenTCPAddr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SockAddr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Socket</span>
<a name="line-80"></a><span class='hs-definition'>listenTCPAddr</span> <span class='hs-varid'>addr</span> <span class='hs-varid'>queuelen</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-81"></a> <span class='hs-varid'>proto</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getProtocolNumber</span> <span class='hs-str'>"tcp"</span>
<a name="line-82"></a> <span class='hs-varid'>s</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>socket</span> <span class='hs-conid'>AF_INET</span> <span class='hs-conid'>Stream</span> <span class='hs-varid'>proto</span>
<a name="line-83"></a> <span class='hs-varid'>bindSocket</span> <span class='hs-varid'>s</span> <span class='hs-varid'>addr</span>
<a name="line-84"></a> <span class='hs-varid'>listen</span> <span class='hs-varid'>s</span> <span class='hs-varid'>queuelen</span>
<a name="line-85"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>s</span>
<a name="line-86"></a>
<a name="line-87"></a><a name="showSockAddr"></a><span class='hs-definition'>showSockAddr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SockAddr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>String</span>
<a name="line-88"></a><span class='hs-cpp'>#if !(defined(mingw32_HOST_OS) || defined(mingw32_TARGET_OS) || defined(__MINGW32__))</span>
<a name="line-89"></a><span class='hs-definition'>showSockAddr</span> <span class='hs-layout'>(</span><span class='hs-conid'>SockAddrUnix</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-str'>"UNIX socket at "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>x</span>
<a name="line-90"></a><span class='hs-cpp'>#endif</span>
<a name="line-91"></a><span class='hs-definition'>showSockAddr</span> <span class='hs-layout'>(</span><span class='hs-conid'>SockAddrInet</span> <span class='hs-varid'>port</span> <span class='hs-varid'>host</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-92"></a> <span class='hs-keyword'>do</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>inet_ntoa</span> <span class='hs-varid'>host</span>
<a name="line-93"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-str'>"IPv4 host "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>h</span> <span class='hs-varop'>++</span> <span class='hs-str'>", port "</span> <span class='hs-varop'>++</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>port</span><span class='hs-layout'>)</span>
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