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

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<a name="l1"></a><span class=cF2>/*</span><span class=cF0> </span><span class=cF2>docs.idris-lang.org/en/latest/st/examples.html</span><span class=cF0>
<a name="l2"></a> </span><span class=cF2>beej.us/guide/bgnet/html/</span><span class=cF0>
<a name="l3"></a>
<a name="l4"></a> </span><span class=cF2>Sockets are non-standard, a simple</span><span class=cF0>
<a name="l5"></a> </span><span class=cF2>Finite State Machine. The functions'</span><span class=cF0>
<a name="l6"></a> </span><span class=cF2>only args are the socket. Socket functions</span><span class=cF0>
<a name="l7"></a> </span><span class=cF2>requiring more parameters should be</span><span class=cF0>
<a name="l8"></a> </span><span class=cF2>defined at the protocol level. </span><span class=cF0>
<a name="l9"></a>
<a name="l10"></a> </span><span class=cF2>The state machine exists to allow</span><span class=cF0>
<a name="l11"></a> </span><span class=cF2>protocol code to execute code in</span><span class=cF0>
<a name="l12"></a> </span><span class=cF2>the appropriate order. When calling</span><span class=cF0>
<a name="l13"></a> </span><span class=cF2>a socket function, code can use</span><span class=cF0>
<a name="l14"></a> </span><span class=cF2>the modified/unmodified states to</span><span class=cF0>
<a name="l15"></a> </span><span class=cF2>determine next procedure. </span><span class=cF0>
<a name="l16"></a>
<a name="l17"></a> </span><span class=cF2>Some code is inclded for IPV6, currently</span><span class=cF0>
<a name="l18"></a> </span><span class=cF2>unused. */</span><span class=cF0>
<a name="l19"></a>
<a name="l20"></a>#</span><span class=cF1>define</span><span class=cF0> SOCKET_STATE_READY </span><span class=cFE>0</span><span class=cF0>
<a name="l21"></a>#</span><span class=cF1>define</span><span class=cF0> SOCKET_STATE_BIND_REQ </span><span class=cFE>1</span><span class=cF0>
<a name="l22"></a>#</span><span class=cF1>define</span><span class=cF0> SOCKET_STATE_CONNECT_REQ </span><span class=cFE>2</span><span class=cF0>
<a name="l23"></a>#</span><span class=cF1>define</span><span class=cF0> SOCKET_STATE_BOUND </span><span class=cFE>3</span><span class=cF0>
<a name="l24"></a>#</span><span class=cF1>define</span><span class=cF0> SOCKET_STATE_LISTEN_REQ </span><span class=cFE>4</span><span class=cF0>
<a name="l25"></a>#</span><span class=cF1>define</span><span class=cF0> SOCKET_STATE_LISTENING </span><span class=cFE>5</span><span class=cF0>
<a name="l26"></a>#</span><span class=cF1>define</span><span class=cF0> SOCKET_STATE_OPEN </span><span class=cFE>6</span><span class=cF0>
<a name="l27"></a>#</span><span class=cF1>define</span><span class=cF0> SOCKET_STATE_CLOSE_REQ </span><span class=cFE>7</span><span class=cF0>
<a name="l28"></a>#</span><span class=cF1>define</span><span class=cF0> SOCKET_STATE_CLOSED </span><span class=cFE>8</span><span class=cF0>
<a name="l29"></a>
<a name="l30"></a>#</span><span class=cF1>define</span><span class=cF0> SOCKET_STREAM </span><span class=cFE>1</span><span class=cF0>
<a name="l31"></a>#</span><span class=cF1>define</span><span class=cF0> SOCKET_DATAGRAM </span><span class=cFE>2</span><span class=cF0>
<a name="l32"></a>#</span><span class=cF1>define</span><span class=cF0> SOCKET_RAW </span><span class=cFE>3</span><span class=cF0>
<a name="l33"></a>
<a name="l34"></a>#</span><span class=cF1>define</span><span class=cF0> AF_UNSPEC </span><span class=cFE>0</span><span class=cF0>
<a name="l35"></a>#</span><span class=cF1>define</span><span class=cF0> AF_INET </span><span class=cFE>2</span><span class=cF0>
<a name="l36"></a>#</span><span class=cF1>define</span><span class=cF0> AF_INET6 </span><span class=cFE>10</span><span class=cF0>
<a name="l37"></a>
<a name="l38"></a>#</span><span class=cF1>define</span><span class=cF0> INADDR_ANY </span><span class=cFE>0</span><span class=cF0>
<a name="l39"></a>
<a name="l40"></a>#</span><span class=cF1>define</span><span class=cF0> INET_ADDRSTRLEN </span><span class=cFE>16</span><span class=cF0> </span><span class=cF2>//pubs.opengroup.com netinit/in.h</span><span class=cF0>
<a name="l41"></a>#</span><span class=cF1>define</span><span class=cF0> INET6_ADDRSTRLEN </span><span class=cFE>46</span><span class=cF0>
<a name="l42"></a>
<a name="l43"></a>#</span><span class=cF1>define</span><span class=cF0> INET_MIN_ADDRSTRLEN </span><span class=cFE>7</span><span class=cF0> </span><span class=cF2>// ex: len of 0.0.0.0</span><span class=cF0>
<a name="l44"></a>#</span><span class=cF1>define</span><span class=cF0> INET6_MIN_ADDRSTRLEN </span><span class=cFE>2</span><span class=cF0> </span><span class=cF2>// ie: len of ::</span><span class=cF0>
<a name="l45"></a>
<a name="l46"></a>
<a name="l47"></a>#</span><span class=cF1>define</span><span class=cF0> IP_PARSE_STATE_NUM </span><span class=cFE>0</span><span class=cF0>
<a name="l48"></a>#</span><span class=cF1>define</span><span class=cF0> IP_PARSE_STATE_DOT </span><span class=cFE>1</span><span class=cF0>
<a name="l49"></a>
<a name="l50"></a></span><span class=cF1>class</span><span class=cF0> CIPV4Address
<a name="l51"></a>{
<a name="l52"></a> </span><span class=cF9>U32</span><span class=cF0> address; </span><span class=cF2>// 'in Network Byte order' ... Big Endian</span><span class=cF0>
<a name="l53"></a>};
<a name="l54"></a>
<a name="l55"></a></span><span class=cF1>class</span><span class=cF0> CIPV6Address
<a name="l56"></a>{
<a name="l57"></a> </span><span class=cF1>U8</span><span class=cF0> address[</span><span class=cFE>16</span><span class=cF0>]; </span><span class=cF2>// a clear #define would be nice</span><span class=cF0>
<a name="l58"></a>};
<a name="l59"></a>
<a name="l60"></a></span><span class=cF1>class</span><span class=cF0> CIPAddressStorage
<a name="l61"></a>{</span><span class=cF2>// class specifically meant to be generic casted either IPV4 or IPV6 Address.</span><span class=cF0>
<a name="l62"></a> </span><span class=cF1>U8</span><span class=cF0> padding[</span><span class=cFE>16</span><span class=cF0>];
<a name="l63"></a>};
<a name="l64"></a>
<a name="l65"></a></span><span class=cF1>class</span><span class=cF0> CSocketAddressIPV4
<a name="l66"></a>{
<a name="l67"></a> </span><span class=cF9>U16</span><span class=cF0> family; </span><span class=cF2>// 'AF_INET'</span><span class=cF0>
<a name="l68"></a> </span><span class=cF9>U16</span><span class=cF0> port; </span><span class=cF2>// 'in Network Byte order' ... Big Endian</span><span class=cF0>
<a name="l69"></a> CIPV4Address address;
<a name="l70"></a> </span><span class=cF1>U8</span><span class=cF0> zeroes[</span><span class=cFE>8</span><span class=cF0>]; </span><span class=cF2>// 'same size as socket address'</span><span class=cF0>
<a name="l71"></a>};
<a name="l72"></a>
<a name="l73"></a></span><span class=cF1>class</span><span class=cF0> CSocketAddressIPV6
<a name="l74"></a>{
<a name="l75"></a> </span><span class=cF9>U16</span><span class=cF0> family; </span><span class=cF2>// 'AF_INET6'</span><span class=cF0>
<a name="l76"></a> </span><span class=cF9>U16</span><span class=cF0> port; </span><span class=cF2>// 'in Network Byte order'... Big Endian</span><span class=cF0>
<a name="l77"></a> </span><span class=cF9>U32</span><span class=cF0> flow_info;
<a name="l78"></a> CIPV6Address address;
<a name="l79"></a> </span><span class=cF9>U32</span><span class=cF0> scope_id;
<a name="l80"></a>};
<a name="l81"></a>
<a name="l82"></a></span><span class=cF1>class</span><span class=cF0> CSocketAddressStorage
<a name="l83"></a>{</span><span class=cF2>/*</span><span class=cF0> </span><span class=cF2>'designed to be large enough to</span><span class=cF0>
<a name="l84"></a> </span><span class=cF2>hold both IPV4 and IPV6 structures.' */</span><span class=cF0>
<a name="l85"></a>
<a name="l86"></a> </span><span class=cF9>U16</span><span class=cF0> family;
<a name="l87"></a> </span><span class=cF1>U8</span><span class=cF0> padding[</span><span class=cFE>26</span><span class=cF0>];
<a name="l88"></a>};
<a name="l89"></a>
<a name="l90"></a></span><span class=cF1>class</span><span class=cF0> CAddressInfo
<a name="l91"></a>{
<a name="l92"></a> </span><span class=cF9>I32</span><span class=cF0> flags;
<a name="l93"></a> </span><span class=cF9>I32</span><span class=cF0> family;
<a name="l94"></a> </span><span class=cF9>I32</span><span class=cF0> socket_type;
<a name="l95"></a> </span><span class=cF9>I32</span><span class=cF0> protocol;
<a name="l96"></a> </span><span class=cF9>I64</span><span class=cF0> address_length;
<a name="l97"></a> CSocketAddressStorage *address;
<a name="l98"></a> </span><span class=cF1>U8</span><span class=cF0> *canonical_name;
<a name="l99"></a> CAddressInfo *next;
<a name="l100"></a>};
<a name="l101"></a>
<a name="l102"></a></span><span class=cF1>class</span><span class=cF0> CSocket
<a name="l103"></a>{
<a name="l104"></a> </span><span class=cF1>U8</span><span class=cF0> state;
<a name="l105"></a>
<a name="l106"></a> </span><span class=cF9>U16</span><span class=cF0> type;
<a name="l107"></a> </span><span class=cF9>U16</span><span class=cF0> domain;
<a name="l108"></a>};
<a name="l109"></a>
<a name="l110"></a></span><span class=cF1>U0</span><span class=cF0> AddressInfoCopy(CAddressInfo *out, CAddressInfo *in)
<a name="l111"></a>{ </span><span class=cF2>// assumes *out already exists</span><span class=cF0>
<a name="l112"></a> </span><span class=cF5>MemCopy</span><span class=cF0>(out, in, </span><span class=cF1>sizeof</span><span class=cF7>(</span><span class=cF0>CAddressInfo</span><span class=cF7>)</span><span class=cF0>);
<a name="l113"></a>
<a name="l114"></a> </span><span class=cF1>if</span><span class=cF0> (in-&gt;address)
<a name="l115"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l116"></a> out-&gt;address = </span><span class=cF5>CAlloc</span><span class=cF0>(in-&gt;address_length);
<a name="l117"></a> </span><span class=cF5>MemCopy</span><span class=cF0>(out-&gt;address, in-&gt;address, in-&gt;address_length);
<a name="l118"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l119"></a>
<a name="l120"></a> </span><span class=cF1>if</span><span class=cF0> (in-&gt;canonical_name)
<a name="l121"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l122"></a> out-&gt;canonical_name = </span><span class=cF5>StrNew</span><span class=cF0>(in-&gt;canonical_name);
<a name="l123"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l124"></a>}
<a name="l125"></a>
<a name="l126"></a></span><span class=cF1>U0</span><span class=cF0> AddressInfoFree(CAddressInfo *info)
<a name="l127"></a>{
<a name="l128"></a> CAddressInfo *next;
<a name="l129"></a>
<a name="l130"></a> </span><span class=cF1>while</span><span class=cF0> (info)
<a name="l131"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l132"></a> next = info-&gt;next;
<a name="l133"></a>
<a name="l134"></a> </span><span class=cF5>Free</span><span class=cF0>(info-&gt;address);
<a name="l135"></a> </span><span class=cF5>Free</span><span class=cF0>(info-&gt;canonical_name);
<a name="l136"></a> </span><span class=cF5>Free</span><span class=cF0>(info);
<a name="l137"></a>
<a name="l138"></a> info = next;
<a name="l139"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l140"></a>}
<a name="l141"></a>
<a name="l142"></a></span><span class=cF1>Bool</span><span class=cF0> IPV4AddressParse(</span><span class=cF1>U8</span><span class=cF0> *string, </span><span class=cF9>U32</span><span class=cF0> *destination)
<a name="l143"></a>{
<a name="l144"></a> </span><span class=cF1>U8</span><span class=cF0> *lexable_string = </span><span class=cF5>StrNew</span><span class=cF0>(string);
<a name="l145"></a>
<a name="l146"></a> lexable_string = </span><span class=cF5>StrReplace</span><span class=cF0>(lexable_string, </span><span class=cF6>&quot;.&quot;</span><span class=cF0>, </span><span class=cF6>&quot;,&quot;</span><span class=cF0>); </span><span class=cF2>// swap dots with commas since Lex is easier with them.</span><span class=cF0>
<a name="l147"></a>
<a name="l148"></a> </span><span class=cF9>CCompCtrl</span><span class=cF0> *cc = </span><span class=cF5>CompCtrlNew</span><span class=cF0>(lexable_string);
<a name="l149"></a> </span><span class=cF2>//Bts(&amp;cc-&gt;opts, OPTf_DECIMAL_ONLY);</span><span class=cF0>
<a name="l150"></a>
<a name="l151"></a> cc-&gt;opts |= </span><span class=cFE>1</span><span class=cF0> &lt;&lt; </span><span class=cF3>OPTf_DECIMAL_ONLY</span><span class=cF0>;
<a name="l152"></a>
<a name="l153"></a> </span><span class=cF9>I64</span><span class=cF0> tk;
<a name="l154"></a>
<a name="l155"></a> </span><span class=cF9>I64</span><span class=cF0> state = IP_PARSE_STATE_NUM;
<a name="l156"></a> </span><span class=cF9>U32</span><span class=cF0> temp_destination = </span><span class=cFE>0</span><span class=cF0>;
<a name="l157"></a>
<a name="l158"></a> </span><span class=cF9>I64</span><span class=cF0> current_section = </span><span class=cFE>0</span><span class=cF0>; </span><span class=cF2>// IPV4 address has 4 total sections</span><span class=cF0>
<a name="l159"></a>
<a name="l160"></a> </span><span class=cF1>while</span><span class=cF0> (tk = </span><span class=cF5>Lex</span><span class=cF7>(</span><span class=cF0>cc</span><span class=cF7>)</span><span class=cF0>)
<a name="l161"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l162"></a> </span><span class=cF1>switch</span><span class=cF0> (state)
<a name="l163"></a> {
<a name="l164"></a> </span><span class=cF1>case</span><span class=cF0> IP_PARSE_STATE_NUM:
<a name="l165"></a> </span><span class=cF1>switch</span><span class=cF0> (tk)
<a name="l166"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l167"></a> </span><span class=cF1>case</span><span class=cF0> </span><span class=cF3>TK_I64</span><span class=cF0>:
<a name="l168"></a> </span><span class=cF1>if</span><span class=cF0> (cc-&gt;cur_i64 &gt; </span><span class=cFE>255</span><span class=cF0> || cc-&gt;cur_i64 &lt; </span><span class=cFE>0</span><span class=cF0>)
<a name="l169"></a> {
<a name="l170"></a> NetErr(</span><span class=cF6>&quot;IPV4 ADDRESS PARSE: Invalid value, must be 0 - 255.&quot;</span><span class=cF0>);
<a name="l171"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>FALSE</span><span class=cF0>;
<a name="l172"></a> }
<a name="l173"></a> </span><span class=cF1>if</span><span class=cF0> (current_section &gt; </span><span class=cFE>3</span><span class=cF0>)
<a name="l174"></a> {
<a name="l175"></a> NetErr(</span><span class=cF6>&quot;IPV4 ADDRESS PARSE: IP Address can only have 4 sections.&quot;</span><span class=cF0>);
<a name="l176"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>FALSE</span><span class=cF0>;
<a name="l177"></a> }
<a name="l178"></a>
<a name="l179"></a> temp_destination |= cc-&gt;cur_i64 &lt;&lt; (current_section * </span><span class=cFE>8</span><span class=cF0>);
<a name="l180"></a> current_section++;
<a name="l181"></a>
<a name="l182"></a> state = IP_PARSE_STATE_DOT;
<a name="l183"></a>
<a name="l184"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l185"></a>
<a name="l186"></a> </span><span class=cF1>default</span><span class=cF0>:
<a name="l187"></a> NetErr(</span><span class=cF6>&quot;IPV4 ADDRESS PARSE: Expected decimal. &quot;</span><span class=cF0>);
<a name="l188"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>FALSE</span><span class=cF0>;
<a name="l189"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l190"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l191"></a>
<a name="l192"></a> </span><span class=cF1>case</span><span class=cF0> IP_PARSE_STATE_DOT:
<a name="l193"></a> </span><span class=cF1>switch</span><span class=cF0> (tk)
<a name="l194"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l195"></a> </span><span class=cF1>case</span><span class=cF0> </span><span class=cF6>','</span><span class=cF0>:
<a name="l196"></a> state = IP_PARSE_STATE_NUM;
<a name="l197"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l198"></a>
<a name="l199"></a> </span><span class=cF1>default</span><span class=cF0>:
<a name="l200"></a> NetErr(</span><span class=cF6>&quot;IPV4 ADDRESS PARSE: Expected dot. &quot;</span><span class=cF0>);
<a name="l201"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>FALSE</span><span class=cF0>;
<a name="l202"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l203"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l204"></a> }
<a name="l205"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l206"></a>
<a name="l207"></a> </span><span class=cF5>CompCtrlDel</span><span class=cF0>(cc);
<a name="l208"></a>
<a name="l209"></a> temp_destination = </span><span class=cF5>EndianU32</span><span class=cF0>(temp_destination); </span><span class=cF2>// store the address in Network Byte Order (Big-Endian)</span><span class=cF0>
<a name="l210"></a> *destination = temp_destination;
<a name="l211"></a>
<a name="l212"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l213"></a>}
<a name="l214"></a>
<a name="l215"></a></span><span class=cF9>I64</span><span class=cF0> PresentationToNetwork(</span><span class=cF9>I64</span><span class=cF0> address_family, </span><span class=cF1>U8</span><span class=cF0> *string, CIPAddressStorage *destination)
<a name="l216"></a>{
<a name="l217"></a></span><span class=cF2>/*</span><span class=cF0> </span><span class=cF2>Converts IP string to internet address class, our inet_pton().</span><span class=cF0>
<a name="l218"></a> </span><span class=cF2>Destination written as CIPV4Address or CIPV6Address depending</span><span class=cF0>
<a name="l219"></a> </span><span class=cF2>on value of address_family.</span><span class=cF0>
<a name="l220"></a> </span><span class=cF2>The destination address is the generic class, functions</span><span class=cF0>
<a name="l221"></a> </span><span class=cF2>calling this method must cast their classes in the params. */</span><span class=cF0>
<a name="l222"></a>
<a name="l223"></a> CIPV4Address *ipv4_address;
<a name="l224"></a> CIPV6Address *ipv6_address;
<a name="l225"></a>
<a name="l226"></a> </span><span class=cF9>I64</span><span class=cF0> string_length = </span><span class=cF5>StrLen</span><span class=cF0>(string);
<a name="l227"></a>
<a name="l228"></a> </span><span class=cF1>switch</span><span class=cF0> (address_family)
<a name="l229"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l230"></a> </span><span class=cF1>case</span><span class=cF0> AF_INET:
<a name="l231"></a> </span><span class=cF1>if</span><span class=cF0> (string_length &gt; INET_ADDRSTRLEN || string_length &lt; INET_MIN_ADDRSTRLEN)
<a name="l232"></a> {
<a name="l233"></a> NetErr(</span><span class=cF6>&quot;IP to Socket Address failed: Invalid Input String Size.&quot;</span><span class=cF0>);
<a name="l234"></a> </span><span class=cF1>return</span><span class=cF0> -</span><span class=cFE>1</span><span class=cF0>;
<a name="l235"></a> }
<a name="l236"></a> ipv4_address = destination;
<a name="l237"></a>
<a name="l238"></a> </span><span class=cF1>if</span><span class=cF0> (!IPV4AddressParse</span><span class=cF7>(</span><span class=cF0>string, &amp;ipv4_address-&gt;address</span><span class=cF7>)</span><span class=cF0>)
<a name="l239"></a> </span><span class=cF1>return</span><span class=cF0> -</span><span class=cFE>1</span><span class=cF0>;
<a name="l240"></a>
<a name="l241"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l242"></a>
<a name="l243"></a> </span><span class=cF1>case</span><span class=cF0> AF_INET6:
<a name="l244"></a> </span><span class=cF1>if</span><span class=cF0> (string_length &gt; INET6_ADDRSTRLEN || string_length &lt; INET6_MIN_ADDRSTRLEN)
<a name="l245"></a> {
<a name="l246"></a> NetErr(</span><span class=cF6>&quot;IP to Socket Address failed: Invalid Input String Size.&quot;</span><span class=cF0>);
<a name="l247"></a> </span><span class=cF1>return</span><span class=cF0> -</span><span class=cFE>1</span><span class=cF0>;
<a name="l248"></a> }
<a name="l249"></a> ipv6_address = destination;
<a name="l250"></a>
<a name="l251"></a>
<a name="l252"></a> NetErr(</span><span class=cF6>&quot;IP to Socket Address failed: FIXME, IPV6 support not implemented yet.\n&quot;</span><span class=cF0>);
<a name="l253"></a> </span><span class=cF1>return</span><span class=cF0> -</span><span class=cFE>1</span><span class=cF0>;
<a name="l254"></a>
<a name="l255"></a> </span><span class=cF1>default</span><span class=cF0>:
<a name="l256"></a> NetErr(</span><span class=cF6>&quot;IP to Socket Address failed: Invalid Address Family.&quot;</span><span class=cF0>);
<a name="l257"></a> </span><span class=cF1>return</span><span class=cF0> -</span><span class=cFE>1</span><span class=cF0>;
<a name="l258"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l259"></a>
<a name="l260"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
<a name="l261"></a>
<a name="l262"></a>}
<a name="l263"></a>
<a name="l264"></a></span><span class=cF1>U8</span><span class=cF0> *NetworkToPresentation(</span><span class=cF9>I64</span><span class=cF0> address_family, CIPAddressStorage *source)
<a name="l265"></a>{ </span><span class=cF2>// converts socket address to IP string, our inet_ntop. Taking Shrine approach of function returns U8* .</span><span class=cF0>
<a name="l266"></a>
<a name="l267"></a>
<a name="l268"></a> </span><span class=cF1>U8</span><span class=cF0> *ip_string = </span><span class=cF3>NULL</span><span class=cF0>;
<a name="l269"></a> CIPV4Address *ipv4_source;
<a name="l270"></a> CIPV4Address *ipv6_source;
<a name="l271"></a>
<a name="l272"></a> </span><span class=cF1>switch</span><span class=cF0> (address_family)
<a name="l273"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l274"></a> </span><span class=cF1>case</span><span class=cF0> AF_INET:
<a name="l275"></a>
<a name="l276"></a> ipv4_source = source;
<a name="l277"></a>
<a name="l278"></a> ip_string = </span><span class=cF5>MStrPrint</span><span class=cF0>(</span><span class=cF6>&quot;%d.%d.%d.%d&quot;</span><span class=cF0>,
<a name="l279"></a> ipv4_source-&gt;address.u8[</span><span class=cFE>0</span><span class=cF0>],
<a name="l280"></a> ipv4_source-&gt;address.u8[</span><span class=cFE>1</span><span class=cF0>],
<a name="l281"></a> ipv4_source-&gt;address.u8[</span><span class=cFE>2</span><span class=cF0>],
<a name="l282"></a> ipv4_source-&gt;address.u8[</span><span class=cFE>3</span><span class=cF0>]);
<a name="l283"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l284"></a>
<a name="l285"></a> </span><span class=cF1>case</span><span class=cF0> AF_INET6:
<a name="l286"></a>
<a name="l287"></a> ipv6_source = source;
<a name="l288"></a>
<a name="l289"></a> NetErr(</span><span class=cF6>&quot;Socket Address to IP failed: FIXME, IPV6 support not implemented yet.\n&quot;</span><span class=cF0>);
<a name="l290"></a> </span><span class=cF1>return</span><span class=cF0> -</span><span class=cFE>1</span><span class=cF0>;
<a name="l291"></a>
<a name="l292"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l293"></a> </span><span class=cF1>default</span><span class=cF0>:
<a name="l294"></a> NetErr(</span><span class=cF6>&quot;Socket Address to IP failed: Invalid Address Family.&quot;</span><span class=cF0>);
<a name="l295"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l296"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l297"></a>
<a name="l298"></a> </span><span class=cF1>return</span><span class=cF0> ip_string;
<a name="l299"></a>}
<a name="l300"></a>
<a name="l301"></a>
<a name="l302"></a>CSocket *Socket(</span><span class=cF9>U16</span><span class=cF0> domain, </span><span class=cF9>U16</span><span class=cF0> type)
<a name="l303"></a>{
<a name="l304"></a> CSocket *socket = </span><span class=cF5>CAlloc</span><span class=cF0>(</span><span class=cF1>sizeof</span><span class=cF7>(</span><span class=cF0>CSocket</span><span class=cF7>)</span><span class=cF0>);
<a name="l305"></a>
<a name="l306"></a> socket-&gt;domain = domain;
<a name="l307"></a> socket-&gt;type = type;
<a name="l308"></a>
<a name="l309"></a> socket-&gt;state = SOCKET_STATE_READY;
<a name="l310"></a>
<a name="l311"></a> </span><span class=cF1>return</span><span class=cF0> socket;
<a name="l312"></a>}
<a name="l313"></a>
<a name="l314"></a></span><span class=cF1>U0</span><span class=cF0> SocketStateErr(</span><span class=cF1>U8</span><span class=cF0> *request, </span><span class=cF1>U8</span><span class=cF0> state)
<a name="l315"></a>{
<a name="l316"></a> </span><span class=cF1>U8</span><span class=cF0> *state_string;
<a name="l317"></a> </span><span class=cF1>switch</span><span class=cF0> (state)
<a name="l318"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l319"></a> </span><span class=cF1>case</span><span class=cF0> SOCKET_STATE_READY:
<a name="l320"></a> state_string = </span><span class=cF5>StrNew</span><span class=cF0>(</span><span class=cF6>&quot;READY&quot;</span><span class=cF0>);
<a name="l321"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l322"></a> </span><span class=cF1>case</span><span class=cF0> SOCKET_STATE_BIND_REQ:
<a name="l323"></a> state_string = </span><span class=cF5>StrNew</span><span class=cF0>(</span><span class=cF6>&quot;BIND REQUEST&quot;</span><span class=cF0>);
<a name="l324"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l325"></a> </span><span class=cF1>case</span><span class=cF0> SOCKET_STATE_CONNECT_REQ:
<a name="l326"></a> state_string = </span><span class=cF5>StrNew</span><span class=cF0>(</span><span class=cF6>&quot;CONNECT REQUEST&quot;</span><span class=cF0>);
<a name="l327"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l328"></a> </span><span class=cF1>case</span><span class=cF0> SOCKET_STATE_BOUND:
<a name="l329"></a> state_string = </span><span class=cF5>StrNew</span><span class=cF0>(</span><span class=cF6>&quot;BOUND&quot;</span><span class=cF0>);
<a name="l330"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l331"></a> </span><span class=cF1>case</span><span class=cF0> SOCKET_STATE_LISTEN_REQ:
<a name="l332"></a> state_string = </span><span class=cF5>StrNew</span><span class=cF0>(</span><span class=cF6>&quot;LISTEN REQUEST&quot;</span><span class=cF0>);
<a name="l333"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l334"></a> </span><span class=cF1>case</span><span class=cF0> SOCKET_STATE_LISTENING:
<a name="l335"></a> state_string = </span><span class=cF5>StrNew</span><span class=cF0>(</span><span class=cF6>&quot;LISTENING&quot;</span><span class=cF0>);
<a name="l336"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l337"></a> </span><span class=cF1>case</span><span class=cF0> SOCKET_STATE_OPEN:
<a name="l338"></a> state_string = </span><span class=cF5>StrNew</span><span class=cF0>(</span><span class=cF6>&quot;OPEN&quot;</span><span class=cF0>);
<a name="l339"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l340"></a> </span><span class=cF1>case</span><span class=cF0> SOCKET_STATE_CLOSE_REQ:
<a name="l341"></a> state_string = </span><span class=cF5>StrNew</span><span class=cF0>(</span><span class=cF6>&quot;CLOSE REQUEST&quot;</span><span class=cF0>);
<a name="l342"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l343"></a> </span><span class=cF1>case</span><span class=cF0> SOCKET_STATE_CLOSED:
<a name="l344"></a> state_string = </span><span class=cF5>StrNew</span><span class=cF0>(</span><span class=cF6>&quot;CLOSED&quot;</span><span class=cF0>);
<a name="l345"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l346"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l347"></a> NetErr(</span><span class=cF6>&quot;Socket attempted %s while in %s state.&quot;</span><span class=cF0>, request, state_string);
<a name="l348"></a>}
<a name="l349"></a>
<a name="l350"></a></span><span class=cF1>Bool</span><span class=cF0> SocketAccept(CSocket *socket)
<a name="l351"></a>{
<a name="l352"></a> </span><span class=cF1>switch</span><span class=cF0> (socket-&gt;state)
<a name="l353"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l354"></a> </span><span class=cF1>case</span><span class=cF0> SOCKET_STATE_LISTENING:
<a name="l355"></a> </span><span class=cF2>/*</span><span class=cF0> </span><span class=cF2>Socket expected to stay listening.</span><span class=cF0>
<a name="l356"></a> </span><span class=cF2>At protocol level, a new socket 'connected'</span><span class=cF0>
<a name="l357"></a> </span><span class=cF2>to this one is expected to be made. */</span><span class=cF0>
<a name="l358"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l359"></a>
<a name="l360"></a> </span><span class=cF1>default</span><span class=cF0>:
<a name="l361"></a> SocketStateErr(</span><span class=cF6>&quot;ACCEPT&quot;</span><span class=cF0>, socket-&gt;state);
<a name="l362"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>FALSE</span><span class=cF0>;
<a name="l363"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l364"></a>}
<a name="l365"></a>
<a name="l366"></a></span><span class=cF1>Bool</span><span class=cF0> SocketClose(CSocket *socket)
<a name="l367"></a>{ </span><span class=cF2>/* Sockets attempting close will enter close</span><span class=cF0>
<a name="l368"></a> </span><span class=cF2>request state before destroying the socket at</span><span class=cF0>
<a name="l369"></a> </span><span class=cF2>the protocol level. */</span><span class=cF0>
<a name="l370"></a> socket-&gt;state = SOCKET_STATE_CLOSE_REQ;
<a name="l371"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l372"></a>}
<a name="l373"></a>
<a name="l374"></a></span><span class=cF1>Bool</span><span class=cF0> SocketBind(CSocket *socket)
<a name="l375"></a>{
<a name="l376"></a> </span><span class=cF1>switch</span><span class=cF0> (socket-&gt;state)
<a name="l377"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l378"></a> </span><span class=cF1>case</span><span class=cF0> SOCKET_STATE_READY:
<a name="l379"></a> </span><span class=cF2>/*</span><span class=cF0> </span><span class=cF2>Sockets can only be bound</span><span class=cF0>
<a name="l380"></a> </span><span class=cF2>if they are in initial state. */</span><span class=cF0>
<a name="l381"></a> socket-&gt;state = SOCKET_STATE_BIND_REQ;
<a name="l382"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l383"></a>
<a name="l384"></a> </span><span class=cF1>default</span><span class=cF0>:
<a name="l385"></a> SocketStateErr(</span><span class=cF6>&quot;BIND&quot;</span><span class=cF0>, socket-&gt;state);
<a name="l386"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>FALSE</span><span class=cF0>;
<a name="l387"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l388"></a>}
<a name="l389"></a>
<a name="l390"></a></span><span class=cF1>Bool</span><span class=cF0> SocketConnect(CSocket *socket)
<a name="l391"></a>{
<a name="l392"></a> </span><span class=cF1>switch</span><span class=cF0> (socket-&gt;state)
<a name="l393"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l394"></a> </span><span class=cF1>case</span><span class=cF0> SOCKET_STATE_READY:
<a name="l395"></a> </span><span class=cF2>/*</span><span class=cF0> </span><span class=cF2>Sockets can only be connected</span><span class=cF0>
<a name="l396"></a> </span><span class=cF2>if they are in initial state. */</span><span class=cF0>
<a name="l397"></a> socket-&gt;state = SOCKET_STATE_CONNECT_REQ;
<a name="l398"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l399"></a>
<a name="l400"></a> </span><span class=cF1>default</span><span class=cF0>:
<a name="l401"></a> SocketStateErr(</span><span class=cF6>&quot;CONNECT&quot;</span><span class=cF0>, socket-&gt;state);
<a name="l402"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>FALSE</span><span class=cF0>;
<a name="l403"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l404"></a>}
<a name="l405"></a>
<a name="l406"></a></span><span class=cF1>Bool</span><span class=cF0> SocketListen(CSocket *socket)
<a name="l407"></a>{
<a name="l408"></a> </span><span class=cF1>switch</span><span class=cF0> (socket-&gt;state)
<a name="l409"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l410"></a> </span><span class=cF1>case</span><span class=cF0> SOCKET_STATE_BOUND:
<a name="l411"></a> </span><span class=cF2>/*</span><span class=cF0> </span><span class=cF2>A socket must be bound to</span><span class=cF0>
<a name="l412"></a> </span><span class=cF2>set it to listening. */</span><span class=cF0>
<a name="l413"></a> socket-&gt;state = SOCKET_STATE_LISTEN_REQ;
<a name="l414"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l415"></a>
<a name="l416"></a> </span><span class=cF1>default</span><span class=cF0>:
<a name="l417"></a> SocketStateErr(</span><span class=cF6>&quot;LISTEN&quot;</span><span class=cF0>, socket-&gt;state);
<a name="l418"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>FALSE</span><span class=cF0>;
<a name="l419"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l420"></a>}
<a name="l421"></a>
<a name="l422"></a></span><span class=cF1>Bool</span><span class=cF0> SocketReceive(CSocket *socket)
<a name="l423"></a>{
<a name="l424"></a> </span><span class=cF1>switch</span><span class=cF0> (socket-&gt;state)
<a name="l425"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l426"></a> </span><span class=cF1>case</span><span class=cF0> SOCKET_STATE_OPEN:
<a name="l427"></a> </span><span class=cF1>case</span><span class=cF0> SOCKET_STATE_BOUND:
<a name="l428"></a> </span><span class=cF2>/*</span><span class=cF0> </span><span class=cF2>Sockets can only recv when</span><span class=cF0>
<a name="l429"></a> </span><span class=cF2>connected to or bound. */</span><span class=cF0>
<a name="l430"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l431"></a>
<a name="l432"></a> </span><span class=cF1>default</span><span class=cF0>:
<a name="l433"></a> SocketStateErr(</span><span class=cF6>&quot;RECEIVE&quot;</span><span class=cF0>, socket-&gt;state);
<a name="l434"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>FALSE</span><span class=cF0>;
<a name="l435"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l436"></a>}
<a name="l437"></a>
<a name="l438"></a></span><span class=cF1>Bool</span><span class=cF0> SocketReceiveFrom(CSocket *socket)
<a name="l439"></a>{
<a name="l440"></a> </span><span class=cF1>switch</span><span class=cF0> (socket-&gt;state)
<a name="l441"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l442"></a> </span><span class=cF1>case</span><span class=cF0> SOCKET_STATE_OPEN:
<a name="l443"></a> </span><span class=cF1>case</span><span class=cF0> SOCKET_STATE_BOUND:
<a name="l444"></a> </span><span class=cF2>/*</span><span class=cF0> </span><span class=cF2>Sockets can only recvfrom when</span><span class=cF0>
<a name="l445"></a> </span><span class=cF2>connected to or bound. */</span><span class=cF0>
<a name="l446"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l447"></a>
<a name="l448"></a> </span><span class=cF1>default</span><span class=cF0>:
<a name="l449"></a> SocketStateErr(</span><span class=cF6>&quot;RECEIVE FROM&quot;</span><span class=cF0>, socket-&gt;state);
<a name="l450"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>FALSE</span><span class=cF0>;
<a name="l451"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l452"></a>}
<a name="l453"></a>
<a name="l454"></a></span><span class=cF1>Bool</span><span class=cF0> SocketSend(CSocket *socket)
<a name="l455"></a>{
<a name="l456"></a> </span><span class=cF1>switch</span><span class=cF0> (socket-&gt;state)
<a name="l457"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l458"></a> </span><span class=cF1>case</span><span class=cF0> SOCKET_STATE_OPEN:
<a name="l459"></a> </span><span class=cF2>/*</span><span class=cF0> </span><span class=cF2>Sockets can only send when</span><span class=cF0>
<a name="l460"></a> </span><span class=cF2>they have been connected to. */</span><span class=cF0>
<a name="l461"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l462"></a>
<a name="l463"></a> </span><span class=cF1>default</span><span class=cF0>:
<a name="l464"></a> SocketStateErr(</span><span class=cF6>&quot;SEND&quot;</span><span class=cF0>, socket-&gt;state);
<a name="l465"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>FALSE</span><span class=cF0>;
<a name="l466"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l467"></a>}
<a name="l468"></a>
<a name="l469"></a></span><span class=cF1>Bool</span><span class=cF0> SocketSendTo(CSocket *socket)
<a name="l470"></a>{
<a name="l471"></a> </span><span class=cF1>switch</span><span class=cF0> (socket-&gt;state)
<a name="l472"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l473"></a> </span><span class=cF1>case</span><span class=cF0> SOCKET_STATE_OPEN:
<a name="l474"></a> </span><span class=cF1>case</span><span class=cF0> SOCKET_STATE_BOUND:
<a name="l475"></a> </span><span class=cF1>case</span><span class=cF0> SOCKET_STATE_READY:
<a name="l476"></a> </span><span class=cF2>/*</span><span class=cF0> </span><span class=cF2>Sockets can only sendto when</span><span class=cF0>
<a name="l477"></a> </span><span class=cF2>connected to, bound, or in</span><span class=cF0>
<a name="l478"></a> </span><span class=cF2>initial state. Protocol logic</span><span class=cF0>
<a name="l479"></a> </span><span class=cF2>will determine how to change</span><span class=cF0>
<a name="l480"></a> </span><span class=cF2>state based on params. */</span><span class=cF0>
<a name="l481"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l482"></a>
<a name="l483"></a> </span><span class=cF1>default</span><span class=cF0>:
<a name="l484"></a> SocketStateErr(</span><span class=cF6>&quot;SEND TO&quot;</span><span class=cF0>, socket-&gt;state);
<a name="l485"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>FALSE</span><span class=cF0>;
<a name="l486"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l487"></a>}</span></pre></body>
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