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 <span id="projectnumber">2.0</span>
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<div class="title">DHCP<div class="ingroups"><a class="el" href="../../d9/de2/group__lwip__opts.html">Options (lwipopts.h)</a> » <a class="el" href="../../d6/dd7/group__lwip__opts__ipv4.html">IPv4</a></div></div> </div>
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Collaboration diagram for DHCP:</div>
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<div class="center"><img src="../../d4/dc6/group__lwip__opts__dhcp.png" border="0" usemap="#d4_2dc6_2group____lwip____opts____dhcp" alt=""/></div>
<map name="d4_2dc6_2group____lwip____opts____dhcp" id="d4_2dc6_2group____lwip____opts____dhcp">
<area shape="rect" title=" " alt="" coords="100,5,159,31"/>
<area shape="rect" href="../../d6/dd7/group__lwip__opts__ipv4.html" title=" " alt="" coords="5,5,52,31"/>
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Macros</h2></td></tr>
<tr class="memitem:gab2d91de7b2fce879b0a213682e1b0b69"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="../../d4/dc6/group__lwip__opts__dhcp.html#gab2d91de7b2fce879b0a213682e1b0b69">DHCP_DOES_ARP_CHECK</a>   ((<a class="el" href="../../d4/dc6/group__lwip__opts__dhcp.html#ga8a6ec62dc121064ac591b1fd8567bee9">LWIP_DHCP</a>) && (<a class="el" href="../../dc/d98/group__lwip__opts__arp.html#ga9609a014bba4638cc191d6a8f9556c87">LWIP_ARP</a>))</td></tr>
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<tr class="memitem:ga8a6ec62dc121064ac591b1fd8567bee9"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="../../d4/dc6/group__lwip__opts__dhcp.html#ga8a6ec62dc121064ac591b1fd8567bee9">LWIP_DHCP</a>   0</td></tr>
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<tr class="memitem:ga3c2983cbd228011dd3e18cb417e7e423"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="../../d4/dc6/group__lwip__opts__dhcp.html#ga3c2983cbd228011dd3e18cb417e7e423">LWIP_DHCP_BOOTP_FILE</a>   0</td></tr>
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<tr class="memitem:ga1e9ec404a96581fdbc9d231a8a698a60"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="../../d4/dc6/group__lwip__opts__dhcp.html#ga1e9ec404a96581fdbc9d231a8a698a60">LWIP_DHCP_CHECK_LINK_UP</a>   0</td></tr>
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<tr class="memitem:ga2cc18315edcd5ffc083d1256f7d22a83"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="../../d4/dc6/group__lwip__opts__dhcp.html#ga2cc18315edcd5ffc083d1256f7d22a83">LWIP_DHCP_GET_NTP_SRV</a>   0</td></tr>
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<tr class="memitem:ga60ccc20fbb08be24b5d5f599dd47a6a6"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="../../d4/dc6/group__lwip__opts__dhcp.html#ga60ccc20fbb08be24b5d5f599dd47a6a6">LWIP_DHCP_MAX_DNS_SERVERS</a>   <a class="el" href="../../d6/dbe/group__lwip__opts__dns.html#ga9f9881c887a8aceb9765820c2dbdf292">DNS_MAX_SERVERS</a></td></tr>
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<tr class="memitem:ga9d014e3f7dc9e1e7c7decd8652ba65e2"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="../../d4/dc6/group__lwip__opts__dhcp.html#ga9d014e3f7dc9e1e7c7decd8652ba65e2">LWIP_DHCP_MAX_NTP_SERVERS</a>   1</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<h2 class="groupheader">Macro Definition Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#gab2d91de7b2fce879b0a213682e1b0b69">◆ </a></span>DHCP_DOES_ARP_CHECK</h2>
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<td class="memname">#define DHCP_DOES_ARP_CHECK   ((<a class="el" href="../../d4/dc6/group__lwip__opts__dhcp.html#ga8a6ec62dc121064ac591b1fd8567bee9">LWIP_DHCP</a>) && (<a class="el" href="../../dc/d98/group__lwip__opts__arp.html#ga9609a014bba4638cc191d6a8f9556c87">LWIP_ARP</a>))</td>
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<p>DHCP_DOES_ARP_CHECK==1: Do an ARP check on the offered address. </p>
<p class="definition">Definition at line <a class="el" href="../../dc/dba/opt_8h_source.html#l00810">810</a> of file <a class="el" href="../../dc/dba/opt_8h_source.html">opt.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga8a6ec62dc121064ac591b1fd8567bee9">◆ </a></span>LWIP_DHCP</h2>
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<td class="memname">#define LWIP_DHCP   0</td>
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<p>LWIP_DHCP==1: Enable DHCP module. </p>
<p class="definition">Definition at line <a class="el" href="../../dc/dba/opt_8h_source.html#l00798">798</a> of file <a class="el" href="../../dc/dba/opt_8h_source.html">opt.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga3c2983cbd228011dd3e18cb417e7e423">◆ </a></span>LWIP_DHCP_BOOTP_FILE</h2>
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<td class="memname">#define LWIP_DHCP_BOOTP_FILE   0</td>
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<p>LWIP_DHCP_BOOTP_FILE==1: Store offered_si_addr and boot_file_name. </p>
<p class="definition">Definition at line <a class="el" href="../../dc/dba/opt_8h_source.html#l00827">827</a> of file <a class="el" href="../../dc/dba/opt_8h_source.html">opt.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga1e9ec404a96581fdbc9d231a8a698a60">◆ </a></span>LWIP_DHCP_CHECK_LINK_UP</h2>
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<td class="memname">#define LWIP_DHCP_CHECK_LINK_UP   0</td>
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<p>LWIP_DHCP_CHECK_LINK_UP==1: dhcp_start() only really starts if the netif has NETIF_FLAG_LINK_UP set in its flags. As this is only an optimization and netif drivers might not set this flag, the default is off. If enabled, <a class="el" href="../../d7/d3a/group__netif.html#gae0d2975f189277990e9d5276fdd9e9ea">netif_set_link_up()</a> must be called to continue dhcp starting. </p>
<p class="definition">Definition at line <a class="el" href="../../dc/dba/opt_8h_source.html#l00820">820</a> of file <a class="el" href="../../dc/dba/opt_8h_source.html">opt.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga2cc18315edcd5ffc083d1256f7d22a83">◆ </a></span>LWIP_DHCP_GET_NTP_SRV</h2>
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<td class="memname">#define LWIP_DHCP_GET_NTP_SRV   0</td>
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<p>LWIP_DHCP_GETS_NTP==1: Request NTP servers with discover/select. For each response packet, an callback is called, which has to be provided by the port: void dhcp_set_ntp_servers(u8_t num_ntp_servers, ip_addr_t* ntp_server_addrs); </p>
<p class="definition">Definition at line <a class="el" href="../../dc/dba/opt_8h_source.html#l00836">836</a> of file <a class="el" href="../../dc/dba/opt_8h_source.html">opt.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga60ccc20fbb08be24b5d5f599dd47a6a6">◆ </a></span>LWIP_DHCP_MAX_DNS_SERVERS</h2>
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<td class="memname">#define LWIP_DHCP_MAX_DNS_SERVERS   <a class="el" href="../../d6/dbe/group__lwip__opts__dns.html#ga9f9881c887a8aceb9765820c2dbdf292">DNS_MAX_SERVERS</a></td>
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<p>LWIP_DHCP_MAX_DNS_SERVERS > 0: Request DNS servers with discover/select. DHCP servers received in the response are passed to DNS via dns_setserver() (up to the maximum limit defined here). </p>
<p class="definition">Definition at line <a class="el" href="../../dc/dba/opt_8h_source.html#l00852">852</a> of file <a class="el" href="../../dc/dba/opt_8h_source.html">opt.h</a>.</p>
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<td class="memname">#define LWIP_DHCP_MAX_NTP_SERVERS   1</td>
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<p>The maximum of NTP servers requested </p>
<p class="definition">Definition at line <a class="el" href="../../dc/dba/opt_8h_source.html#l00843">843</a> of file <a class="el" href="../../dc/dba/opt_8h_source.html">opt.h</a>.</p>
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