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<title>Network/Wai/Logger/Utils.hs</title>
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<pre><a name="line-1"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Network</span><span class='hs-varop'>.</span><span class='hs-conid'>Wai</span><span class='hs-varop'>.</span><span class='hs-conid'>Logger</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span> <span class='hs-layout'>(</span>
<a name="line-2"></a> <span class='hs-conid'>NumericAddress</span><span class='hs-layout'>,</span> <span class='hs-varid'>showSockAddr</span>
<a name="line-3"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-4"></a>
<a name="line-5"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Bits</span>
<a name="line-6"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Word</span>
<a name="line-7"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Network</span><span class='hs-varop'>.</span><span class='hs-conid'>Socket</span> <span class='hs-layout'>(</span><span class='hs-conid'>SockAddr</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-8"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteOrder</span>
<a name="line-9"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Printf</span>
<a name="line-10"></a>
<a name="line-11"></a><a name="NumericAddress"></a><span class='hs-comment'>{-|
<a name="line-12"></a> A type for IP address in numeric string representation.
<a name="line-13"></a>-}</span>
<a name="line-14"></a><a name="NumericAddress"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>NumericAddress</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>String</span>
<a name="line-15"></a>
<a name="line-16"></a><a name="showIPv4"></a><span class='hs-definition'>showIPv4</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Word32</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>NumericAddress</span>
<a name="line-17"></a><span class='hs-definition'>showIPv4</span> <span class='hs-varid'>w32</span> <span class='hs-varid'>little</span>
<a name="line-18"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>little</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>show</span> <span class='hs-varid'>b1</span> <span class='hs-varop'>++</span> <span class='hs-str'>"."</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>b2</span> <span class='hs-varop'>++</span> <span class='hs-str'>"."</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>b3</span> <span class='hs-varop'>++</span> <span class='hs-str'>"."</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>b4</span>
<a name="line-19"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>show</span> <span class='hs-varid'>b4</span> <span class='hs-varop'>++</span> <span class='hs-str'>"."</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>b3</span> <span class='hs-varop'>++</span> <span class='hs-str'>"."</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>b2</span> <span class='hs-varop'>++</span> <span class='hs-str'>"."</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>b1</span>
<a name="line-20"></a> <span class='hs-keyword'>where</span>
<a name="line-21"></a> <span class='hs-varid'>t1</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>w32</span>
<a name="line-22"></a> <span class='hs-varid'>t2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>shift</span> <span class='hs-varid'>t1</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-num'>8</span><span class='hs-layout'>)</span>
<a name="line-23"></a> <span class='hs-varid'>t3</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>shift</span> <span class='hs-varid'>t2</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-num'>8</span><span class='hs-layout'>)</span>
<a name="line-24"></a> <span class='hs-varid'>t4</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>shift</span> <span class='hs-varid'>t3</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-num'>8</span><span class='hs-layout'>)</span>
<a name="line-25"></a> <span class='hs-varid'>b1</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>t1</span> <span class='hs-varop'>.&.</span> <span class='hs-num'>0x000000ff</span>
<a name="line-26"></a> <span class='hs-varid'>b2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>t2</span> <span class='hs-varop'>.&.</span> <span class='hs-num'>0x000000ff</span>
<a name="line-27"></a> <span class='hs-varid'>b3</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>t3</span> <span class='hs-varop'>.&.</span> <span class='hs-num'>0x000000ff</span>
<a name="line-28"></a> <span class='hs-varid'>b4</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>t4</span> <span class='hs-varop'>.&.</span> <span class='hs-num'>0x000000ff</span>
<a name="line-29"></a>
<a name="line-30"></a><a name="showIPv6"></a><span class='hs-definition'>showIPv6</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Word32</span><span class='hs-layout'>,</span><span class='hs-conid'>Word32</span><span class='hs-layout'>,</span><span class='hs-conid'>Word32</span><span class='hs-layout'>,</span><span class='hs-conid'>Word32</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-31"></a><span class='hs-definition'>showIPv6</span> <span class='hs-layout'>(</span><span class='hs-varid'>w1</span><span class='hs-layout'>,</span><span class='hs-varid'>w2</span><span class='hs-layout'>,</span><span class='hs-varid'>w3</span><span class='hs-layout'>,</span><span class='hs-varid'>w4</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-32"></a> <span class='hs-varid'>printf</span> <span class='hs-str'>"%x:%x:%x:%x:%x:%x:%x:%x"</span> <span class='hs-varid'>s1</span> <span class='hs-varid'>s2</span> <span class='hs-varid'>s3</span> <span class='hs-varid'>s4</span> <span class='hs-varid'>s5</span> <span class='hs-varid'>s6</span> <span class='hs-varid'>s7</span> <span class='hs-varid'>s8</span>
<a name="line-33"></a> <span class='hs-keyword'>where</span>
<a name="line-34"></a> <span class='hs-layout'>(</span><span class='hs-varid'>s1</span><span class='hs-layout'>,</span><span class='hs-varid'>s2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>split16</span> <span class='hs-varid'>w1</span>
<a name="line-35"></a> <span class='hs-layout'>(</span><span class='hs-varid'>s3</span><span class='hs-layout'>,</span><span class='hs-varid'>s4</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>split16</span> <span class='hs-varid'>w2</span>
<a name="line-36"></a> <span class='hs-layout'>(</span><span class='hs-varid'>s5</span><span class='hs-layout'>,</span><span class='hs-varid'>s6</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>split16</span> <span class='hs-varid'>w3</span>
<a name="line-37"></a> <span class='hs-layout'>(</span><span class='hs-varid'>s7</span><span class='hs-layout'>,</span><span class='hs-varid'>s8</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>split16</span> <span class='hs-varid'>w4</span>
<a name="line-38"></a> <span class='hs-varid'>split16</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>h1</span><span class='hs-layout'>,</span><span class='hs-varid'>h2</span><span class='hs-layout'>)</span>
<a name="line-39"></a> <span class='hs-keyword'>where</span>
<a name="line-40"></a> <span class='hs-varid'>h1</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>shift</span> <span class='hs-varid'>w</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-num'>16</span><span class='hs-layout'>)</span> <span class='hs-varop'>.&.</span> <span class='hs-num'>0x0000ffff</span>
<a name="line-41"></a> <span class='hs-varid'>h2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>w</span> <span class='hs-varop'>.&.</span> <span class='hs-num'>0x0000ffff</span>
<a name="line-42"></a><a name="showSockAddr"></a><span class='hs-comment'>{-|
<a name="line-43"></a> Convert 'SockAddr' to 'NumericAddress'. If the address is
<a name="line-44"></a> an IPv4-embedded IPv6 address, the IPv4 is extracted.
<a name="line-45"></a>-}</span>
<a name="line-46"></a><span class='hs-comment'>-- HostAddr is network byte order.</span>
<a name="line-47"></a><span class='hs-comment'>-- HostAddr6 is host byte order.</span>
<a name="line-48"></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'>NumericAddress</span>
<a name="line-49"></a><span class='hs-definition'>showSockAddr</span> <span class='hs-layout'>(</span><span class='hs-conid'>SockAddrInet</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>addr4</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showIPv4</span> <span class='hs-varid'>addr4</span> <span class='hs-layout'>(</span><span class='hs-varid'>byteOrder</span> <span class='hs-varop'>==</span> <span class='hs-conid'>LittleEndian</span><span class='hs-layout'>)</span>
<a name="line-50"></a><span class='hs-definition'>showSockAddr</span> <span class='hs-layout'>(</span><span class='hs-conid'>SockAddrInet6</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-num'>0</span><span class='hs-layout'>,</span><span class='hs-num'>0</span><span class='hs-layout'>,</span><span class='hs-num'>0x0000ffff</span><span class='hs-layout'>,</span><span class='hs-varid'>addr4</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showIPv4</span> <span class='hs-varid'>addr4</span> <span class='hs-conid'>False</span>
<a name="line-51"></a><span class='hs-definition'>showSockAddr</span> <span class='hs-layout'>(</span><span class='hs-conid'>SockAddrInet6</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-num'>0</span><span class='hs-layout'>,</span><span class='hs-num'>0</span><span class='hs-layout'>,</span><span class='hs-num'>0</span><span class='hs-layout'>,</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"::1"</span>
<a name="line-52"></a><span class='hs-definition'>showSockAddr</span> <span class='hs-layout'>(</span><span class='hs-conid'>SockAddrInet6</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>addr6</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showIPv6</span> <span class='hs-varid'>addr6</span>
<a name="line-53"></a><span class='hs-definition'>showSockAddr</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"unknownSocket"</span>
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