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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>uIP 1.0: uIP conversion functions</title><link href="doxygen.css" rel="stylesheet" type="text/css"><link href="tabs.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.4.6 --><div class="tabs"> <ul> <li><a href="main.html"><span>Main Page</span></a></li> <li><a href="modules.html"><span>Modules</span></a></li> <li><a href="classes.html"><span>Data Structures</span></a></li> <li><a href="files.html"><span>Files</span></a></li> <li><a href="examples.html"><span>Examples</span></a></li> </ul></div><h1>uIP conversion functions<br><small>[<a class="el" href="a00150.html">The uIP TCP/IP stack</a>]</small></h1><hr><a name="_details"></a><h2>Detailed Description</h2>These functions can be used for converting between different data formats used by uIP. <p><p><table border="0" cellpadding="0" cellspacing="0"><tr><td></td></tr><tr><td colspan="2"><br><h2>Defines</h2></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="a00148.html#g87f0b54ade0d159fba495089128a4932">uip_ipaddr</a>(addr, addr0, addr1, addr2, addr3)</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">Construct an IP address from four bytes. <a href="#g87f0b54ade0d159fba495089128a4932"></a><br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="a00148.html#g53fbda0e8c31d4882294c8dc3cb5f487">uip_ip6addr</a>(addr, addr0, addr1, addr2, addr3, addr4, addr5, addr6, addr7)</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">Construct an IPv6 address from eight 16-bit words. <a href="#g53fbda0e8c31d4882294c8dc3cb5f487"></a><br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="a00148.html#g769512993b7b27271909d6daa4748b60">uip_ipaddr_copy</a>(dest, src)</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">Copy an IP address to another IP address. <a href="#g769512993b7b27271909d6daa4748b60"></a><br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="a00148.html#g210e629f7252e4bc8458cbdf260b3318">uip_ipaddr_cmp</a>(addr1, addr2)</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">Compare two IP addresses. <a href="#g210e629f7252e4bc8458cbdf260b3318"></a><br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="a00148.html#g6b16e0bac41821c1fbe0c267071642f0">uip_ipaddr_maskcmp</a>(addr1, addr2, mask)</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">Compare two IP addresses with netmasks. <a href="#g6b16e0bac41821c1fbe0c267071642f0"></a><br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="a00148.html#g969d7fff37a979737da045e0d538a9bd">uip_ipaddr_mask</a>(dest, src, mask)</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">Mask out the network part of an IP address. <a href="#g969d7fff37a979737da045e0d538a9bd"></a><br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="a00148.html#g22fa0681cd463191d7a01fe85d86996f">uip_ipaddr1</a>(addr)</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">Pick the first octet of an IP address. <a href="#g22fa0681cd463191d7a01fe85d86996f"></a><br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="a00148.html#gffcd2fbe181e2aaefbf970551c302af5">uip_ipaddr2</a>(addr)</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">Pick the second octet of an IP address. <a href="#gffcd2fbe181e2aaefbf970551c302af5"></a><br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="a00148.html#ge23534479ead15af8ff08ace26a47fb5">uip_ipaddr3</a>(addr)</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">Pick the third octet of an IP address. <a href="#ge23534479ead15af8ff08ace26a47fb5"></a><br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="a00148.html#g165b603ec150e26efec7be199c9c2901">uip_ipaddr4</a>(addr)</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">Pick the fourth octet of an IP address. <a href="#g165b603ec150e26efec7be199c9c2901"></a><br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="a00148.html#g69a7a4951ff21b302267532c21ee78fc">HTONS</a>(n)</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">Convert 16-bit quantity from host byte order to network byte order. <a href="#g69a7a4951ff21b302267532c21ee78fc"></a><br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="g118e9d76568ab81ad97f138d4ea1ddd2"></a><!-- doxytag: member="uipconvfunc::ntohs" ref="g118e9d76568ab81ad97f138d4ea1ddd2" args="" -->#define </td><td class="memItemRight" valign="bottom"><a class="el" href="a00148.html#g118e9d76568ab81ad97f138d4ea1ddd2">ntohs</a> htons</td></tr><tr><td colspan="2"><br><h2>Functions</h2></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00148.html#ga22b04cac8cf283ca12f028578bebc06">htons</a> (<a class="el" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> val)</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">Convert 16-bit quantity from host byte order to network byte order. <a href="#ga22b04cac8cf283ca12f028578bebc06"></a><br></td></tr></table><hr><h2>Define Documentation</h2><a class="anchor" name="g69a7a4951ff21b302267532c21ee78fc"></a><!-- doxytag: member="uip.h::HTONS" ref="g69a7a4951ff21b302267532c21ee78fc" args="(n)" --><p><table class="mdTable" cellpadding="2" cellspacing="0"> <tr> <td class="mdRow"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top">#define HTONS </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">n </td> <td class="mdname1" valign="top" nowrap> </td> <td class="md" valign="top"> ) </td> <td class="md" nowrap></td> </tr> </table> </td> </tr></table><table cellspacing="5" cellpadding="0" border="0"> <tr> <td> </td> <td><p>Convert 16-bit quantity from host byte order to network byte order. <p>This macro is primarily used for converting constants from host byte order to network byte order. For converting variables to network byte order, use the <a class="el" href="a00148.html#ga22b04cac8cf283ca12f028578bebc06">htons()</a> function instead. <dl compact><dt><b>Examples: </b></dt><dd><a class="el" href="a00048.html#a6">dhcpc.c</a>, <a class="el" href="a00036.html#a103">hello-world.c</a>, <a class="el" href="a00046.html#a139">resolv.c</a>, <a class="el" href="a00038.html#a191">smtp.c</a>, and <a class="el" href="a00044.html#a219">telnetd.c</a>.</dl><p>Definition at line <a class="el" href="a00202.html#l01070">1070</a> of file <a class="el" href="a00202.html">uip.h</a>.<p>Referenced by <a class="el" href="a00170.html#l00041">hello_world_init()</a>, <a class="el" href="a00201.html#l01882">htons()</a>, <a class="el" href="a00184.html#l00333">httpd_init()</a>, <a class="el" href="a00172.html#l00331">resolv_appcall()</a>, <a class="el" href="a00172.html#l00438">resolv_conf()</a>, <a class="el" href="a00174.html#l00233">smtp_send()</a>, <a class="el" href="a00204.html#l00278">uip_arp_arpin()</a>, and <a class="el" href="a00201.html#l00682">uip_process()</a>. </td> </tr></table><a class="anchor" name="g53fbda0e8c31d4882294c8dc3cb5f487"></a><!-- doxytag: member="uip.h::uip_ip6addr" ref="g53fbda0e8c31d4882294c8dc3cb5f487" args="(addr, addr0, addr1, addr2, addr3, addr4, addr5, addr6, addr7)" --><p><table class="mdTable" cellpadding="2" cellspacing="0"> <tr> <td class="mdRow"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top">#define uip_ip6addr </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">addr, <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>addr0, <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>addr1, <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>addr2, <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>addr3, <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>addr4, <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>addr5, <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>addr6, <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>addr7 </td> <td class="mdname1" valign="top" nowrap> </td> <td class="md" valign="top"> ) </td> <td class="md" nowrap></td> </tr> </table> </td> </tr></table><table cellspacing="5" cellpadding="0" border="0"> <tr> <td> </td> <td><p>Construct an IPv6 address from eight 16-bit words. <p>This function constructs an IPv6 address. <p>Definition at line <a class="el" href="a00202.html#l00852">852</a> of file <a class="el" href="a00202.html">uip.h</a>. </td> </tr></table><a class="anchor" name="g87f0b54ade0d159fba495089128a4932"></a><!-- doxytag: member="uip.h::uip_ipaddr" ref="g87f0b54ade0d159fba495089128a4932" args="(addr, addr0, addr1, addr2, addr3)" --><p><table class="mdTable" cellpadding="2" cellspacing="0"> <tr> <td class="mdRow"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top">#define uip_ipaddr </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">addr, <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>addr0, <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>addr1, <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>addr2, <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>addr3 </td> <td class="mdname1" valign="top" nowrap> </td> <td class="md" valign="top"> ) </td> <td class="md" nowrap></td> </tr> </table> </td> </tr></table><table cellspacing="5" cellpadding="0" border="0"> <tr> <td> </td> <td><p>Construct an IP address from four bytes. <p>This function constructs an IP address of the type that uIP handles internally from four bytes. The function is handy for specifying IP addresses to use with e.g. the <a class="el" href="a00147.html#g8096b0c4b543dc408f4dd031ddae7240">uip_connect()</a> function.<p>Example: <div class="fragment"><pre class="fragment"> <a class="code" href="a00150.html#g1ef35301f43a5bbb9f89f07b5a36b9a0">uip_ipaddr_t</a> ipaddr; <span class="keyword">struct </span><a class="code" href="a00088.html">uip_conn</a> *c; <a class="code" href="a00148.html#g87f0b54ade0d159fba495089128a4932">uip_ipaddr</a>(&ipaddr, 192,168,1,2); c = <a class="code" href="a00147.html#g8096b0c4b543dc408f4dd031ddae7240">uip_connect</a>(&ipaddr, <a class="code" href="a00148.html#g69a7a4951ff21b302267532c21ee78fc">HTONS</a>(80));</pre></div><p><dl compact><dt><b>Parameters:</b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td valign="top"></td><td valign="top"><em>addr</em> </td><td>A pointer to a uip_ipaddr_t variable that will be filled in with the IP address.</td></tr> <tr><td valign="top"></td><td valign="top"><em>addr0</em> </td><td>The first octet of the IP address. </td></tr> <tr><td valign="top"></td><td valign="top"><em>addr1</em> </td><td>The second octet of the IP address. </td></tr> <tr><td valign="top"></td><td valign="top"><em>addr2</em> </td><td>The third octet of the IP address. </td></tr> <tr><td valign="top"></td><td valign="top"><em>addr3</em> </td><td>The forth octet of the IP address. </td></tr>⌨️ 快捷键说明
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