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ZealOS/docs/Home/Net/Tests/PCP.ZC.html
TomAwezome a879d1a330 Update docs.
2021-12-30 22:21:33 -05:00

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<a name="l1"></a><span class=cF2>// Port Control Protocol prototyping.</span><span class=cF0>
<a name="l2"></a></span><span class=cF2>// RFC 6887</span><span class=cF0>
<a name="l3"></a>
<a name="l4"></a></span><span class=cF1>class</span><span class=cF0> CPCPRequestHeader
<a name="l5"></a>{
<a name="l6"></a> </span><span class=cF1>U8</span><span class=cF0> version;
<a name="l7"></a> </span><span class=cF1>U8</span><span class=cF0> opcode; </span><span class=cF2>// includes R bit.</span><span class=cF0>
<a name="l8"></a> </span><span class=cF9>U16</span><span class=cF0> reserved; </span><span class=cF2>// must be all 0 on TX</span><span class=cF0>
<a name="l9"></a> </span><span class=cF9>U32</span><span class=cF0> req_lifetime; </span><span class=cF2>// seconds. 0 interpreted as 'delete'.</span><span class=cF0>
<a name="l10"></a> </span><span class=cF1>U8</span><span class=cF0> pcp_client_ip[</span><span class=cFE>16</span><span class=cF0>]; </span><span class=cF2>// source ipv4 addr converted to ipv4-mapped ipv6 as per spec. 128 bits</span><span class=cF0>
<a name="l11"></a>};
<a name="l12"></a>
<a name="l13"></a></span><span class=cF1>class</span><span class=cF0> CPCPMapRequest
<a name="l14"></a>{
<a name="l15"></a> CPCPRequestHeader header;
<a name="l16"></a> </span><span class=cF1>U8</span><span class=cF0> nonce[</span><span class=cFE>12</span><span class=cF0>]; </span><span class=cF2>// &quot;Mapping Nonce&quot; 96 bits of random vals.</span><span class=cF0>
<a name="l17"></a> </span><span class=cF1>U8</span><span class=cF0> protocol; </span><span class=cF2>// 6 TCP. 17 UDP. 0 'all protocols'.</span><span class=cF0>
<a name="l18"></a> </span><span class=cF1>U8</span><span class=cF0> reserved[</span><span class=cFE>3</span><span class=cF0>]; </span><span class=cF2>// 24 bits, TX must be 0, ignore on RX.</span><span class=cF0>
<a name="l19"></a>
<a name="l20"></a> </span><span class=cF9>U16</span><span class=cF0> internal_port;
<a name="l21"></a> </span><span class=cF2>/*</span><span class=cF0> </span><span class=cF2>internal_port. 0 'all ports' legal only on lifetime 0 (delete) or client req 'all ports'.</span><span class=cF0>
<a name="l22"></a> </span><span class=cF2>must be ignored on RX. */</span><span class=cF0>
<a name="l23"></a>
<a name="l24"></a> </span><span class=cF9>U16</span><span class=cF0> external_port;
<a name="l25"></a> </span><span class=cF2>/*</span><span class=cF0> </span><span class=cF2>external_port. 'suggested'. if client doesnt know it or has no preference it must be 0.*/</span><span class=cF0>
<a name="l26"></a>
<a name="l27"></a> </span><span class=cF1>U8</span><span class=cF0> external_ip[</span><span class=cFE>16</span><span class=cF0>];
<a name="l28"></a> </span><span class=cF2>/*</span><span class=cF0> </span><span class=cF2>external_ip. 'suggested'. if client doesnt know it or no preference,</span><span class=cF0>
<a name="l29"></a> </span><span class=cF2> it must use 'address-family-specific all-zero address. */</span><span class=cF0>
<a name="l30"></a>
<a name="l31"></a>};
<a name="l32"></a>
<a name="l33"></a></span><span class=cF9>I64</span><span class=cF0> PCPSendMapRequest(</span><span class=cF9>U16</span><span class=cF0> internal_port, </span><span class=cF9>U16</span><span class=cF0> external_port=</span><span class=cF3>NULL</span><span class=cF0>, </span><span class=cF9>U32</span><span class=cF0> external_ip=</span><span class=cF3>NULL</span><span class=cF0>)
<a name="l34"></a>{
<a name="l35"></a> </span><span class=cF1>U8</span><span class=cF0> *frame;
<a name="l36"></a> CPCPMapRequest *request;
<a name="l37"></a> </span><span class=cF9>I64</span><span class=cF0> de_index;
<a name="l38"></a> </span><span class=cF9>I64</span><span class=cF0> i;
<a name="l39"></a>
<a name="l40"></a> de_index = UDPPacketAllocate(&amp;frame,
<a name="l41"></a> IPV4AddressGet,
<a name="l42"></a> </span><span class=cFE>5351</span><span class=cF0>,
<a name="l43"></a> ipv4_globals.ipv4_router_address,
<a name="l44"></a> </span><span class=cFE>5351</span><span class=cF0>,
<a name="l45"></a> </span><span class=cF1>sizeof</span><span class=cF7>(</span><span class=cF0>CPCPMapRequest</span><span class=cF7>)</span><span class=cF0>);
<a name="l46"></a> </span><span class=cF1>if</span><span class=cF0> (de_index &lt; </span><span class=cFE>0</span><span class=cF0>)
<a name="l47"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l48"></a> NetErr(</span><span class=cF6>&quot;PCP SEND MAP REQ: Failed, UDPPacketAllocate returned error.&quot;</span><span class=cF0>);
<a name="l49"></a> </span><span class=cF1>return</span><span class=cF0> de_index;
<a name="l50"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l51"></a>
<a name="l52"></a> request = frame;
<a name="l53"></a>
<a name="l54"></a> request-&gt;header.version = </span><span class=cFE>2</span><span class=cF0>;
<a name="l55"></a> request-&gt;header.opcode = </span><span class=cFE>1</span><span class=cF0>; </span><span class=cF2>// MAP</span><span class=cF0>
<a name="l56"></a> request-&gt;header.req_lifetime = </span><span class=cFE>60</span><span class=cF0>; </span><span class=cF2>// live for 1 min.</span><span class=cF0>
<a name="l57"></a>
<a name="l58"></a> </span><span class=cF2>// force local IPV4 addr into IPV4-mapped-IPV6</span><span class=cF0>
<a name="l59"></a> </span><span class=cF1>for</span><span class=cF0> (i = </span><span class=cFE>0</span><span class=cF0>; i &lt; </span><span class=cFE>10</span><span class=cF0>; i++) </span><span class=cF2>// first 80 bits 0</span><span class=cF0>
<a name="l60"></a> request-&gt;header.pcp_client_ip[i] = </span><span class=cFE>0</span><span class=cF0>;
<a name="l61"></a>
<a name="l62"></a> </span><span class=cF1>for</span><span class=cF0> (; i &lt; </span><span class=cFE>10</span><span class=cF0> + </span><span class=cFE>2</span><span class=cF0>; i++) </span><span class=cF2>// next 16 bits 1</span><span class=cF0>
<a name="l63"></a> request-&gt;header.pcp_client_ip[i] = </span><span class=cFE>0xFF</span><span class=cF0>;
<a name="l64"></a>
<a name="l65"></a> *(&amp;request-&gt;header.pcp_client_ip[i]</span><span class=cF7>(</span><span class=cF9>U32</span><span class=cF0> *</span><span class=cF7>)</span><span class=cF0>) = </span><span class=cF5>EndianU32</span><span class=cF0>(IPV4AddressGet);
<a name="l66"></a> </span><span class=cF2>//</span><span class=cF0>
<a name="l67"></a>
<a name="l68"></a> </span><span class=cF2>// set random 'nonce'</span><span class=cF0>
<a name="l69"></a> </span><span class=cF1>for</span><span class=cF0> (i = </span><span class=cFE>0</span><span class=cF0>; i &lt; </span><span class=cFE>12</span><span class=cF0>; i++)
<a name="l70"></a> request-&gt;nonce[i] = </span><span class=cF5>RandU8</span><span class=cF0>;
<a name="l71"></a>
<a name="l72"></a> request-&gt;protocol = IP_PROTOCOL_UDP;
<a name="l73"></a>
<a name="l74"></a> request-&gt;internal_port = internal_port;
<a name="l75"></a> request-&gt;external_port = external_port;
<a name="l76"></a>
<a name="l77"></a> </span><span class=cF1>if</span><span class=cF0> (!external_ip)
<a name="l78"></a> </span><span class=cF7>{</span><span class=cF0> </span><span class=cF2>// if no specified ext ip, use specific ipv4-mapped-ipv6 all-zeroes address.</span><span class=cF0>
<a name="l79"></a> </span><span class=cF1>for</span><span class=cF0> (i = </span><span class=cFE>0</span><span class=cF0>; i &lt; </span><span class=cFE>10</span><span class=cF0>; i++)
<a name="l80"></a> request-&gt;external_ip[i] = </span><span class=cFE>0</span><span class=cF0>;
<a name="l81"></a> </span><span class=cF1>for</span><span class=cF0> (; i &lt; </span><span class=cFE>10</span><span class=cF0> + </span><span class=cFE>2</span><span class=cF0>; i++)
<a name="l82"></a> request-&gt;external_ip[i] = </span><span class=cFE>0xFF</span><span class=cF0>;
<a name="l83"></a> *(&amp;request-&gt;external_ip[i]</span><span class=cF7>(</span><span class=cF9>U32</span><span class=cF0> *</span><span class=cF7>)</span><span class=cF0>) = </span><span class=cFE>0</span><span class=cF0>;
<a name="l84"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l85"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l86"></a> </span><span class=cF7>{</span><span class=cF0> </span><span class=cF2>// else, map to param ip</span><span class=cF0>
<a name="l87"></a> </span><span class=cF1>for</span><span class=cF0> (i = </span><span class=cFE>0</span><span class=cF0>; i &lt; </span><span class=cFE>10</span><span class=cF0>; i++)
<a name="l88"></a> request-&gt;external_ip[i] = </span><span class=cFE>0</span><span class=cF0>;
<a name="l89"></a> </span><span class=cF1>for</span><span class=cF0> (; i &lt; </span><span class=cFE>10</span><span class=cF0> + </span><span class=cFE>2</span><span class=cF0>; i++)
<a name="l90"></a> request-&gt;external_ip[i] = </span><span class=cFE>0xFF</span><span class=cF0>;
<a name="l91"></a> *(&amp;request-&gt;external_ip[i]</span><span class=cF7>(</span><span class=cF9>U32</span><span class=cF0> *</span><span class=cF7>)</span><span class=cF0>) = </span><span class=cF5>EndianU32</span><span class=cF0>(external_ip);
<a name="l92"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l93"></a>
<a name="l94"></a> UDPPacketFinish(de_index);
<a name="l95"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
<a name="l96"></a>
<a name="l97"></a>}
<a name="l98"></a>
<a name="l99"></a>PCPSendMapRequest(</span><span class=cFE>0xDEAD</span><span class=cF0>, </span><span class=cFE>0xBEEF</span><span class=cF0>);</span></pre></body>
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