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ZealOS/docs/Home/Net/Protocols/IPV4.ZC.html
TomAwezome 48d4f999cb Update documentation.
2021-12-11 06:10:58 -05:00

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<a name="l1"></a><span class=cF0>#</span><span class=cF1>define</span><span class=cF0> IPV4_ERR_ADDR_INVALID -</span><span class=cFE>200001</span><span class=cF0>
<a name="l2"></a>#</span><span class=cF1>define</span><span class=cF0> IPV4_ERR_HOST_UNREACHABLE -</span><span class=cFE>200002</span><span class=cF0>
<a name="l3"></a>
<a name="l4"></a>#</span><span class=cF1>define</span><span class=cF0> IPV4_TTL </span><span class=cFE>64</span><span class=cF0>
<a name="l5"></a>
<a name="l6"></a></span><span class=cF2>//Look up IP Protocol Numbers online to see many more.</span><span class=cF0>
<a name="l7"></a>#</span><span class=cF1>define</span><span class=cF0> IP_PROTOCOL_ICMP </span><span class=cFE>0x01</span><span class=cF0>
<a name="l8"></a>#</span><span class=cF1>define</span><span class=cF0> IP_PROTOCOL_TCP </span><span class=cFE>0x06</span><span class=cF0>
<a name="l9"></a>#</span><span class=cF1>define</span><span class=cF0> IP_PROTOCOL_UDP </span><span class=cFE>0x11</span><span class=cF0>
<a name="l10"></a>
<a name="l11"></a></span><span class=cF1>class</span><span class=cF0> CIPV4Packet
<a name="l12"></a>{
<a name="l13"></a> CEthernetFrame *ethernet_frame;
<a name="l14"></a>
<a name="l15"></a> </span><span class=cF9>U32</span><span class=cF0> source_ip_address;
<a name="l16"></a> </span><span class=cF9>U32</span><span class=cF0> destination_ip_address;
<a name="l17"></a>
<a name="l18"></a> </span><span class=cF1>U8</span><span class=cF0> protocol;
<a name="l19"></a> </span><span class=cF1>U8</span><span class=cF0> padding[</span><span class=cFE>7</span><span class=cF0>];
<a name="l20"></a>
<a name="l21"></a> </span><span class=cF1>U8</span><span class=cF0> *data;
<a name="l22"></a> </span><span class=cF9>I64</span><span class=cF0> length;
<a name="l23"></a>};
<a name="l24"></a>
<a name="l25"></a></span><span class=cF1>class</span><span class=cF0> CIPV4Header
<a name="l26"></a>{ </span><span class=cF2>// note: U4's in some U8s.</span><span class=cF0>
<a name="l27"></a> </span><span class=cF1>U8</span><span class=cF0> version_ihl; </span><span class=cF2>// Version for IPV4 is 4. IHL=Internet Header Length</span><span class=cF0>
<a name="l28"></a> </span><span class=cF1>U8</span><span class=cF0> dscp_ecn; </span><span class=cF2>// DSCP=Differentiated Services Code Point. ECN=Explicit Congestion Notification</span><span class=cF0>
<a name="l29"></a>
<a name="l30"></a> </span><span class=cF9>U16</span><span class=cF0> total_length; </span><span class=cF2>// min 20B max 65535</span><span class=cF0>
<a name="l31"></a> </span><span class=cF9>U16</span><span class=cF0> identification;
<a name="l32"></a> </span><span class=cF9>U16</span><span class=cF0> flags_fragment_offset; </span><span class=cF2>// flags first(?) 3 bits. fragment offset min 0 max 65528</span><span class=cF0>
<a name="l33"></a> </span><span class=cF2>// flag: bit 0: reserved must be 0. bit 1: don't fragment. bit 2: more fragments</span><span class=cF0>
<a name="l34"></a>
<a name="l35"></a> </span><span class=cF1>U8</span><span class=cF0> time_to_live; </span><span class=cF2>// specified in seconds, wikipedia says nowadays serves as a hop count</span><span class=cF0>
<a name="l36"></a> </span><span class=cF1>U8</span><span class=cF0> protocol;
<a name="l37"></a>
<a name="l38"></a> </span><span class=cF9>U16</span><span class=cF0> header_checksum;
<a name="l39"></a>
<a name="l40"></a> </span><span class=cF9>U32</span><span class=cF0> source_ip_address;
<a name="l41"></a> </span><span class=cF9>U32</span><span class=cF0> destination_ip_address;
<a name="l42"></a>};
<a name="l43"></a>
<a name="l44"></a></span><span class=cF1>class</span><span class=cF0> CIPV4Globals
<a name="l45"></a>{ </span><span class=cF2>// _be indicates Big Endian</span><span class=cF0>
<a name="l46"></a> </span><span class=cF9>U32</span><span class=cF0> local_ip;
<a name="l47"></a> </span><span class=cF9>U32</span><span class=cF0> local_ip_be;
<a name="l48"></a>
<a name="l49"></a> </span><span class=cF9>U32</span><span class=cF0> ipv4_router_address;
<a name="l50"></a> </span><span class=cF9>U32</span><span class=cF0> ipv4_subnet_mask;
<a name="l51"></a>
<a name="l52"></a>} ipv4_globals;
<a name="l53"></a>
<a name="l54"></a></span><span class=cF1>U0</span><span class=cF0> IPV4GlobalsInit()
<a name="l55"></a>{
<a name="l56"></a> ipv4_globals.local_ip = </span><span class=cFE>0</span><span class=cF0>;
<a name="l57"></a> ipv4_globals.local_ip_be = </span><span class=cFE>0</span><span class=cF0>;
<a name="l58"></a> ipv4_globals.ipv4_router_address = </span><span class=cFE>0</span><span class=cF0>;
<a name="l59"></a> ipv4_globals.ipv4_subnet_mask = </span><span class=cFE>0</span><span class=cF0>;
<a name="l60"></a>};
<a name="l61"></a>
<a name="l62"></a></span><span class=cF2>// For now, trusting Shrine's implement</span><span class=cF0>
<a name="l63"></a></span><span class=cF2>// of checksum. Shrine links back to</span><span class=cF0>
<a name="l64"></a></span><span class=cF2>// http://stackoverflow.com/q/26774761/2524350</span><span class=cF0>
<a name="l65"></a>
<a name="l66"></a></span><span class=cF9>U16</span><span class=cF0> IPV4Checksum(</span><span class=cF1>U8</span><span class=cF0> *header, </span><span class=cF9>I64</span><span class=cF0> length)
<a name="l67"></a>{ </span><span class=cF2>//todo. make names clearer, and better comments.</span><span class=cF0>
<a name="l68"></a> </span><span class=cF9>I64</span><span class=cF0> nleft = length;
<a name="l69"></a> </span><span class=cF9>U16</span><span class=cF0> *w = header;
<a name="l70"></a> </span><span class=cF9>I64</span><span class=cF0> sum = </span><span class=cFE>0</span><span class=cF0>;
<a name="l71"></a>
<a name="l72"></a> </span><span class=cF1>while</span><span class=cF0> (nleft &gt; </span><span class=cFE>1</span><span class=cF0>)
<a name="l73"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l74"></a> sum += *w++;
<a name="l75"></a> nleft -= </span><span class=cFE>2</span><span class=cF0>;
<a name="l76"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l77"></a>
<a name="l78"></a> </span><span class=cF2>// &quot;mop up an odd byte, if necessary&quot;</span><span class=cF0>
<a name="l79"></a> </span><span class=cF1>if</span><span class=cF0> (nleft == </span><span class=cFE>1</span><span class=cF0>)
<a name="l80"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l81"></a> sum += *w &amp; </span><span class=cFE>0x00FF</span><span class=cF0>;
<a name="l82"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l83"></a>
<a name="l84"></a> </span><span class=cF2>// &quot;add back carry outs from top 16 bits to low 16 bits&quot;</span><span class=cF0>
<a name="l85"></a> sum = sum &gt;&gt; </span><span class=cFE>16</span><span class=cF0> + sum &amp; </span><span class=cFE>0xFFFF</span><span class=cF0>; </span><span class=cF2>// &quot;add hi 16 to low 16&quot;</span><span class=cF0>
<a name="l86"></a> sum += sum &gt;&gt; </span><span class=cFE>16</span><span class=cF0>; </span><span class=cF2>// add carry</span><span class=cF0>
<a name="l87"></a> </span><span class=cF1>return</span><span class=cF0> ~sum &amp; </span><span class=cFE>0xFFFF</span><span class=cF0>;
<a name="l88"></a>
<a name="l89"></a>}
<a name="l90"></a>
<a name="l91"></a></span><span class=cF9>I64</span><span class=cF0> IPV4AddressMACGet(</span><span class=cF9>U32</span><span class=cF0> ip_address, </span><span class=cF1>U8</span><span class=cF0> **mac_out)
<a name="l92"></a>{
<a name="l93"></a> CARPHash *entry;
<a name="l94"></a> </span><span class=cF9>I64</span><span class=cF0> retries;
<a name="l95"></a> </span><span class=cF9>I64</span><span class=cF0> attempt;
<a name="l96"></a>
<a name="l97"></a> </span><span class=cF1>if</span><span class=cF0> (ip_address == </span><span class=cFE>0</span><span class=cF0>)
<a name="l98"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l99"></a> NetErr(</span><span class=cF6>&quot;GET MAC FOR IP: Failed. Address = 0&quot;</span><span class=cF0>);
<a name="l100"></a> </span><span class=cF1>return</span><span class=cF0> IPV4_ERR_ADDR_INVALID;
<a name="l101"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l102"></a> </span><span class=cF1>if</span><span class=cF0> (ip_address == </span><span class=cFE>0xFFFFFFFF</span><span class=cF0>)
<a name="l103"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l104"></a> NetLog(</span><span class=cF6>&quot;GET MAC FOR IP: Returning ethernet broadcast&quot;</span><span class=cF0>);
<a name="l105"></a> *mac_out = ethernet_globals.ethernet_broadcast;
<a name="l106"></a>
<a name="l107"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
<a name="l108"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l109"></a>
<a name="l110"></a> </span><span class=cF2>// &quot;outside this subnet; needs routing&quot;</span><span class=cF0>
<a name="l111"></a> </span><span class=cF1>if</span><span class=cF0> (ip_address &amp; ipv4_globals.ipv4_subnet_mask != ipv4_globals.local_ip &amp; ipv4_globals.ipv4_subnet_mask)
<a name="l112"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l113"></a> NetWarn(</span><span class=cF6>&quot;GET MAC FOR IP: TODO: Doing IPV4AddressMACGet recursion, could infinite loop and overflow stack.&quot;</span><span class=cF0>);
<a name="l114"></a> </span><span class=cF1>return</span><span class=cF0> IPV4AddressMACGet(ipv4_globals.ipv4_router_address, mac_out);
<a name="l115"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l116"></a> </span><span class=cF1>else</span><span class=cF0> </span><span class=cF2>// &quot;local network&quot;</span><span class=cF0>
<a name="l117"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l118"></a> NetLog(</span><span class=cF6>&quot;GET MAC FOR IP: Attempting ARP Find by IP for address: %0X.&quot;</span><span class=cF0>, ip_address);
<a name="l119"></a> entry = ARPCacheFind(ip_address);
<a name="l120"></a>
<a name="l121"></a> </span><span class=cF1>if</span><span class=cF0> (entry)
<a name="l122"></a> {
<a name="l123"></a> *mac_out = entry-&gt;mac_address;
<a name="l124"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
<a name="l125"></a> }
<a name="l126"></a> </span><span class=cF2>//else, not in cache, need to request it</span><span class=cF0>
<a name="l127"></a>
<a name="l128"></a> </span><span class=cF2>// &quot;Up to 4 retries, 500 ms each&quot;</span><span class=cF0>
<a name="l129"></a> retries = </span><span class=cFE>4</span><span class=cF0>;
<a name="l130"></a> </span><span class=cF1>while</span><span class=cF0> (retries)
<a name="l131"></a> {
<a name="l132"></a> ARPSend(ARP_REQUEST,
<a name="l133"></a> ethernet_globals.ethernet_broadcast,
<a name="l134"></a> EthernetMACGet,
<a name="l135"></a> ipv4_globals.local_ip_be,
<a name="l136"></a> ethernet_globals.ethernet_null,
<a name="l137"></a> </span><span class=cF5>EndianU32</span><span class=cF7>(</span><span class=cF0>ip_address</span><span class=cF7>)</span><span class=cF0>);
<a name="l138"></a>
<a name="l139"></a> attempt = </span><span class=cFE>0</span><span class=cF0>;
<a name="l140"></a> </span><span class=cF1>for</span><span class=cF0> (attempt = </span><span class=cFE>0</span><span class=cF0>; attempt &lt; </span><span class=cFE>50</span><span class=cF0>; attempt++)
<a name="l141"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l142"></a> </span><span class=cF5>Sleep</span><span class=cF0>(</span><span class=cFE>10</span><span class=cF0>);
<a name="l143"></a> entry = ARPCacheFind(ip_address);
<a name="l144"></a> </span><span class=cF1>if</span><span class=cF0> (entry)
<a name="l145"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l146"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l147"></a>
<a name="l148"></a> </span><span class=cF1>if</span><span class=cF0> (entry)
<a name="l149"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l150"></a> *mac_out = entry-&gt;mac_address;
<a name="l151"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
<a name="l152"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l153"></a>
<a name="l154"></a> retries--;
<a name="l155"></a> }
<a name="l156"></a>
<a name="l157"></a> </span><span class=cF2>//Shrine does some in_addr mess to log error</span><span class=cF0>
<a name="l158"></a> NetErr(</span><span class=cF6>&quot;GET MAC FOR IP: Failed to resolve address %d&quot;</span><span class=cF0>, ip_address);
<a name="l159"></a> </span><span class=cF1>return</span><span class=cF0> IPV4_ERR_HOST_UNREACHABLE;
<a name="l160"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l161"></a>}
<a name="l162"></a>
<a name="l163"></a></span><span class=cF9>I64</span><span class=cF0> IPV4PacketAllocate(</span><span class=cF1>U8</span><span class=cF0> **frame_out,
<a name="l164"></a> </span><span class=cF1>U8</span><span class=cF0> protocol,
<a name="l165"></a> </span><span class=cF9>U32</span><span class=cF0> source_ip_address,
<a name="l166"></a> </span><span class=cF9>U32</span><span class=cF0> destination_ip_address,
<a name="l167"></a> </span><span class=cF9>I64</span><span class=cF0> length)
<a name="l168"></a>{
<a name="l169"></a> </span><span class=cF1>U8</span><span class=cF0> *ipv4_frame;
<a name="l170"></a> </span><span class=cF1>U8</span><span class=cF0> *destination_mac_address;
<a name="l171"></a> </span><span class=cF9>I64</span><span class=cF0> error;
<a name="l172"></a> </span><span class=cF9>I64</span><span class=cF0> de_index;
<a name="l173"></a> </span><span class=cF9>I64</span><span class=cF0> internet_header_length;
<a name="l174"></a> CIPV4Header *header;
<a name="l175"></a>
<a name="l176"></a> error = IPV4AddressMACGet(destination_ip_address, &amp;destination_mac_address);
<a name="l177"></a>
<a name="l178"></a> </span><span class=cF1>if</span><span class=cF0> (error &lt; </span><span class=cFE>0</span><span class=cF0>)
<a name="l179"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l180"></a> NetLog(</span><span class=cF6>&quot;IPV4 PACKET ALLOCATE: Failed to get MAC for destination.&quot;</span><span class=cF0>);
<a name="l181"></a> </span><span class=cF1>return</span><span class=cF0> error;
<a name="l182"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l183"></a>
<a name="l184"></a> de_index = EthernetFrameAllocate(&amp;ipv4_frame,
<a name="l185"></a> EthernetMACGet,
<a name="l186"></a> destination_mac_address,
<a name="l187"></a> ETHERTYPE_IPV4,
<a name="l188"></a> </span><span class=cF1>sizeof</span><span class=cF7>(</span><span class=cF0>CIPV4Header</span><span class=cF7>)</span><span class=cF0> + length);
<a name="l189"></a> </span><span class=cF1>if</span><span class=cF0> (de_index &lt; </span><span class=cFE>0</span><span class=cF0>)
<a name="l190"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l191"></a> NetLog(</span><span class=cF6>&quot;IPV4 PACKET ALLOCATE: Ethernet Frame Allocate failed.&quot;</span><span class=cF0>);
<a name="l192"></a> </span><span class=cF1>return</span><span class=cF0> de_index;
<a name="l193"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l194"></a>
<a name="l195"></a> internet_header_length = </span><span class=cFE>5</span><span class=cF0>;</span><span class=cF2>// ... why. need a #define</span><span class=cF0>
<a name="l196"></a>
<a name="l197"></a> header = ipv4_frame;
<a name="l198"></a>
<a name="l199"></a> header-&gt;version_ihl = internet_header_length | </span><span class=cFE>4</span><span class=cF0> &lt;&lt; </span><span class=cFE>4</span><span class=cF0>;</span><span class=cF2>// ? TODO: needs #define</span><span class=cF0>
<a name="l200"></a> header-&gt;dscp_ecn = </span><span class=cFE>0</span><span class=cF0>; </span><span class=cF2>// a clear define of what this actually means would be good</span><span class=cF0>
<a name="l201"></a> header-&gt;total_length = </span><span class=cF5>EndianU16</span><span class=cF0>(internet_header_length * </span><span class=cFE>4</span><span class=cF0> + length); </span><span class=cF2>//...why?</span><span class=cF0>
<a name="l202"></a> header-&gt;identification = </span><span class=cFE>0</span><span class=cF0>; </span><span class=cF2>// define would be clearer</span><span class=cF0>
<a name="l203"></a> header-&gt;flags_fragment_offset = </span><span class=cFE>0</span><span class=cF0>; </span><span class=cF2>// define would be clearer</span><span class=cF0>
<a name="l204"></a> header-&gt;time_to_live = IPV4_TTL;
<a name="l205"></a> header-&gt;protocol = protocol;
<a name="l206"></a> header-&gt;header_checksum = </span><span class=cFE>0</span><span class=cF0>; </span><span class=cF2>// why is 0 ok?</span><span class=cF0>
<a name="l207"></a> header-&gt;source_ip_address = </span><span class=cF5>EndianU32</span><span class=cF0>(source_ip_address);
<a name="l208"></a> header-&gt;destination_ip_address = </span><span class=cF5>EndianU32</span><span class=cF0>(destination_ip_address);
<a name="l209"></a> header-&gt;header_checksum = IPV4Checksum(header, internet_header_length * </span><span class=cFE>4</span><span class=cF0>);</span><span class=cF2>//why the 4's...</span><span class=cF0>
<a name="l210"></a>
<a name="l211"></a> *frame_out = ipv4_frame + </span><span class=cF1>sizeof</span><span class=cF0>(CIPV4Header);
<a name="l212"></a> </span><span class=cF1>return</span><span class=cF0> de_index;
<a name="l213"></a>}
<a name="l214"></a>
<a name="l215"></a></span><span class=cF1>U0</span><span class=cF0> IPV4PacketFinish(</span><span class=cF9>I64</span><span class=cF0> de_index) </span><span class=cF2>//alias for EthernetFrameFinish</span><span class=cF0>
<a name="l216"></a>{
<a name="l217"></a> EthernetFrameFinish(de_index);
<a name="l218"></a>}
<a name="l219"></a>
<a name="l220"></a></span><span class=cF9>U32</span><span class=cF0> IPV4AddressGet()
<a name="l221"></a>{
<a name="l222"></a> </span><span class=cF1>return</span><span class=cF0> ipv4_globals.local_ip;
<a name="l223"></a>}
<a name="l224"></a>
<a name="l225"></a></span><span class=cF1>U0</span><span class=cF0> IPV4AddressSet(</span><span class=cF9>U32</span><span class=cF0> ip_address)
<a name="l226"></a>{
<a name="l227"></a> ipv4_globals.local_ip = ip_address;
<a name="l228"></a> ipv4_globals.local_ip_be = </span><span class=cF5>EndianU32</span><span class=cF0>(ip_address);
<a name="l229"></a>
<a name="l230"></a> ARPLocalIPV4Set(ip_address);
<a name="l231"></a>
<a name="l232"></a>}
<a name="l233"></a>
<a name="l234"></a></span><span class=cF1>U0</span><span class=cF0> IPV4SubnetSet(</span><span class=cF9>U32</span><span class=cF0> router_address, </span><span class=cF9>U32</span><span class=cF0> subnet_mask)
<a name="l235"></a>{
<a name="l236"></a> ipv4_globals.ipv4_router_address = router_address;
<a name="l237"></a> ipv4_globals.ipv4_subnet_mask = subnet_mask;
<a name="l238"></a>}
<a name="l239"></a>
<a name="l240"></a></span><span class=cF2>//I64</span><span class=cF0>
<a name="l241"></a></span><span class=cF1>U0</span><span class=cF0> IPV4PacketParse(CIPV4Packet *packet_out, CEthernetFrame *ethernet_frame)
<a name="l242"></a>{
<a name="l243"></a> </span><span class=cF2>//...if ethertype not ipv4 error?</span><span class=cF0>
<a name="l244"></a>
<a name="l245"></a> </span><span class=cF2>// TODO: Check ethernet_frame length ! ... we need to know what's appropriate</span><span class=cF0>
<a name="l246"></a>
<a name="l247"></a> CIPV4Header *header = ethernet_frame-&gt;data;
<a name="l248"></a> </span><span class=cF9>I64</span><span class=cF0> header_length = (header-&gt;version_ihl &amp; </span><span class=cFE>0x0F</span><span class=cF0>) * </span><span class=cFE>4</span><span class=cF0>;</span><span class=cF2>//this Has to go. at least abstract or something..</span><span class=cF0>
<a name="l249"></a> </span><span class=cF9>U16</span><span class=cF0> total_length = </span><span class=cF5>EndianU16</span><span class=cF0>(header-&gt;total_length);
<a name="l250"></a>
<a name="l251"></a> packet_out-&gt;ethernet_frame = ethernet_frame;
<a name="l252"></a> packet_out-&gt;source_ip_address = </span><span class=cF5>EndianU32</span><span class=cF0>(header-&gt;source_ip_address);
<a name="l253"></a> packet_out-&gt;destination_ip_address = </span><span class=cF5>EndianU32</span><span class=cF0>(header-&gt;destination_ip_address);
<a name="l254"></a> packet_out-&gt;protocol = header-&gt;protocol;
<a name="l255"></a> packet_out-&gt;data = ethernet_frame-&gt;data + header_length;
<a name="l256"></a> packet_out-&gt;length = total_length - header_length;
<a name="l257"></a>
<a name="l258"></a></span><span class=cF2>//</span><span class=cF0> </span><span class=cF2>return 0;</span><span class=cF0>
<a name="l259"></a>}
<a name="l260"></a>
<a name="l261"></a></span><span class=cF1>U0</span><span class=cF0> IPV4Rep()
<a name="l262"></a>{
<a name="l263"></a> </span><span class=cF6>&quot;$LTBLUE$IPV4 Report:$FG$\n\n&quot;</span><span class=cF0>;
<a name="l264"></a>
<a name="l265"></a> </span><span class=cF6>&quot;Local IPV4: %d.%d.%d.%d\n&quot;</span><span class=cF0>,
<a name="l266"></a> ipv4_globals.local_ip.u8[</span><span class=cFE>3</span><span class=cF0>],
<a name="l267"></a> ipv4_globals.local_ip.u8[</span><span class=cFE>2</span><span class=cF0>],
<a name="l268"></a> ipv4_globals.local_ip.u8[</span><span class=cFE>1</span><span class=cF0>],
<a name="l269"></a> ipv4_globals.local_ip.u8[</span><span class=cFE>0</span><span class=cF0>];
<a name="l270"></a> </span><span class=cF6>&quot;Router IPV4: %d.%d.%d.%d\n&quot;</span><span class=cF0>,
<a name="l271"></a> ipv4_globals.ipv4_router_address.u8[</span><span class=cFE>3</span><span class=cF0>],
<a name="l272"></a> ipv4_globals.ipv4_router_address.u8[</span><span class=cFE>2</span><span class=cF0>],
<a name="l273"></a> ipv4_globals.ipv4_router_address.u8[</span><span class=cFE>1</span><span class=cF0>],
<a name="l274"></a> ipv4_globals.ipv4_router_address.u8[</span><span class=cFE>0</span><span class=cF0>];
<a name="l275"></a> </span><span class=cF6>&quot;Subnet IPV4: %d.%d.%d.%d\n&quot;</span><span class=cF0>,
<a name="l276"></a> ipv4_globals.ipv4_subnet_mask.u8[</span><span class=cFE>3</span><span class=cF0>],
<a name="l277"></a> ipv4_globals.ipv4_subnet_mask.u8[</span><span class=cFE>2</span><span class=cF0>],
<a name="l278"></a> ipv4_globals.ipv4_subnet_mask.u8[</span><span class=cFE>1</span><span class=cF0>],
<a name="l279"></a> ipv4_globals.ipv4_subnet_mask.u8[</span><span class=cFE>0</span><span class=cF0>];
<a name="l280"></a> </span><span class=cF6>&quot;\n&quot;</span><span class=cF0>;
<a name="l281"></a>}
<a name="l282"></a>
<a name="l283"></a></span><span class=cF2>// IPV4 handler moved to NetHandlerTask file.</span><span class=cF0>
<a name="l284"></a>IPV4GlobalsInit;</span></pre></body>
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