📄 a00168.html
字号:
<a name="l00109"></a>00109 *optptr++ = DHCP_OPTION_SERVER_ID;<a name="l00110"></a>00110 *optptr++ = 4;<a name="l00111"></a>00111 memcpy(optptr, s.<a class="code" href="a00077.html#564bab93ef6a268a5de2fab885c1d32a">serverid</a>, 4);<a name="l00112"></a>00112 <span class="keywordflow">return</span> optptr + 4;<a name="l00113"></a>00113 }<a name="l00114"></a>00114 <span class="comment">/*---------------------------------------------------------------------------*/</span><a name="l00115"></a>00115 <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *<a name="l00116"></a>00116 add_req_ipaddr(<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *optptr)<a name="l00117"></a>00117 {<a name="l00118"></a>00118 *optptr++ = DHCP_OPTION_REQ_IPADDR;<a name="l00119"></a>00119 *optptr++ = 4;<a name="l00120"></a>00120 memcpy(optptr, s.<a class="code" href="a00077.html#1d2f2751b0865045486c9aa59d0d0971">ipaddr</a>, 4);<a name="l00121"></a>00121 <span class="keywordflow">return</span> optptr + 4;<a name="l00122"></a>00122 }<a name="l00123"></a>00123 <span class="comment">/*---------------------------------------------------------------------------*/</span><a name="l00124"></a>00124 <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *<a name="l00125"></a>00125 add_req_options(<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *optptr)<a name="l00126"></a>00126 {<a name="l00127"></a>00127 *optptr++ = DHCP_OPTION_REQ_LIST;<a name="l00128"></a>00128 *optptr++ = 3;<a name="l00129"></a>00129 *optptr++ = DHCP_OPTION_SUBNET_MASK;<a name="l00130"></a>00130 *optptr++ = DHCP_OPTION_ROUTER;<a name="l00131"></a>00131 *optptr++ = DHCP_OPTION_DNS_SERVER;<a name="l00132"></a>00132 <span class="keywordflow">return</span> optptr;<a name="l00133"></a>00133 }<a name="l00134"></a>00134 <span class="comment">/*---------------------------------------------------------------------------*/</span><a name="l00135"></a>00135 <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *<a name="l00136"></a>00136 add_end(<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *optptr)<a name="l00137"></a>00137 {<a name="l00138"></a>00138 *optptr++ = DHCP_OPTION_END;<a name="l00139"></a>00139 <span class="keywordflow">return</span> optptr;<a name="l00140"></a>00140 }<a name="l00141"></a>00141 <span class="comment">/*---------------------------------------------------------------------------*/</span><a name="l00142"></a>00142 <span class="keyword">static</span> <span class="keywordtype">void</span><a name="l00143"></a>00143 create_msg(<span class="keyword">register</span> <span class="keyword">struct</span> dhcp_msg *m)<a name="l00144"></a>00144 {<a name="l00145"></a>00145 m->op = DHCP_REQUEST;<a name="l00146"></a>00146 m->htype = DHCP_HTYPE_ETHERNET;<a name="l00147"></a>00147 m->hlen = s.<a class="code" href="a00077.html#5361ef75bfbdb469b5cc31f0060a2670">mac_len</a>;<a name="l00148"></a>00148 m->hops = 0;<a name="l00149"></a>00149 memcpy(m->xid, xid, <span class="keyword">sizeof</span>(m->xid));<a name="l00150"></a>00150 m->secs = 0;<a name="l00151"></a>00151 m->flags = <a class="code" href="a00148.html#g69a7a4951ff21b302267532c21ee78fc">HTONS</a>(BOOTP_BROADCAST); <span class="comment">/* Broadcast bit. */</span><a name="l00152"></a>00152 <span class="comment">/* uip_ipaddr_copy(m->ciaddr, uip_hostaddr);*/</span><a name="l00153"></a>00153 memcpy(m->ciaddr, <a class="code" href="a00150.html#g7d3673f52f5846b6961d23b150decd54">uip_hostaddr</a>, <span class="keyword">sizeof</span>(m->ciaddr));<a name="l00154"></a>00154 memset(m->yiaddr, 0, <span class="keyword">sizeof</span>(m->yiaddr));<a name="l00155"></a>00155 memset(m->siaddr, 0, <span class="keyword">sizeof</span>(m->siaddr));<a name="l00156"></a>00156 memset(m->giaddr, 0, <span class="keyword">sizeof</span>(m->giaddr));<a name="l00157"></a>00157 memcpy(m->chaddr, s.<a class="code" href="a00077.html#2391bb18db5f620e0e9fb848ae5ba5e9">mac_addr</a>, s.<a class="code" href="a00077.html#5361ef75bfbdb469b5cc31f0060a2670">mac_len</a>);<a name="l00158"></a>00158 memset(&m->chaddr[s.<a class="code" href="a00077.html#5361ef75bfbdb469b5cc31f0060a2670">mac_len</a>], 0, <span class="keyword">sizeof</span>(m->chaddr) - s.<a class="code" href="a00077.html#5361ef75bfbdb469b5cc31f0060a2670">mac_len</a>);<a name="l00159"></a>00159 <span class="preprocessor">#ifndef UIP_CONF_DHCP_LIGHT</span><a name="l00160"></a>00160 <span class="preprocessor"></span> memset(m->sname, 0, <span class="keyword">sizeof</span>(m->sname));<a name="l00161"></a>00161 memset(m->file, 0, <span class="keyword">sizeof</span>(m->file));<a name="l00162"></a>00162 <span class="preprocessor">#endif</span><a name="l00163"></a>00163 <span class="preprocessor"></span><a name="l00164"></a>00164 memcpy(m->options, magic_cookie, <span class="keyword">sizeof</span>(magic_cookie));<a name="l00165"></a>00165 }<a name="l00166"></a>00166 <span class="comment">/*---------------------------------------------------------------------------*/</span><a name="l00167"></a>00167 <span class="keyword">static</span> <span class="keywordtype">void</span><a name="l00168"></a>00168 send_discover(<span class="keywordtype">void</span>)<a name="l00169"></a>00169 {<a name="l00170"></a>00170 <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *end;<a name="l00171"></a>00171 <span class="keyword">struct </span>dhcp_msg *m = (<span class="keyword">struct </span>dhcp_msg *)<a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a>;<a name="l00172"></a>00172 <a name="l00173"></a>00173 create_msg(m);<a name="l00174"></a>00174 <a name="l00175"></a>00175 end = add_msg_type(&m->options[4], DHCPDISCOVER);<a name="l00176"></a>00176 end = add_req_options(end);<a name="l00177"></a>00177 end = add_end(end);<a name="l00178"></a>00178 <a name="l00179"></a>00179 <a class="code" href="a00147.html#g04b053a623aac7cd4195157d470661b3">uip_send</a>(<a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a>, end - (<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *)<a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a>);<a name="l00180"></a>00180 }<a name="l00181"></a>00181 <span class="comment">/*---------------------------------------------------------------------------*/</span><a name="l00182"></a>00182 <span class="keyword">static</span> <span class="keywordtype">void</span><a name="l00183"></a>00183 send_request(<span class="keywordtype">void</span>)<a name="l00184"></a>00184 {<a name="l00185"></a>00185 <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *end;<a name="l00186"></a>00186 <span class="keyword">struct </span>dhcp_msg *m = (<span class="keyword">struct </span>dhcp_msg *)<a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a>;<a name="l00187"></a>00187 <a name="l00188"></a>00188 create_msg(m);<a name="l00189"></a>00189 <a name="l00190"></a>00190 end = add_msg_type(&m->options[4], DHCPREQUEST);<a name="l00191"></a>00191 end = add_server_id(end);<a name="l00192"></a>00192 end = add_req_ipaddr(end);<a name="l00193"></a>00193 end = add_end(end);<a name="l00194"></a>00194 <a name="l00195"></a>00195 <a class="code" href="a00147.html#g04b053a623aac7cd4195157d470661b3">uip_send</a>(<a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a>, end - (<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *)<a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a>);<a name="l00196"></a>00196 }<a name="l00197"></a>00197 <span class="comment">/*---------------------------------------------------------------------------*/</span><a name="l00198"></a>00198 <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a><a name="l00199"></a>00199 parse_options(<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *optptr, <span class="keywordtype">int</span> len)<a name="l00200"></a>00200 {<a name="l00201"></a>00201 <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *end = optptr + len;<a name="l00202"></a>00202 <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> type = 0;<a name="l00203"></a>00203 <a name="l00204"></a>00204 <span class="keywordflow">while</span>(optptr < end) {<a name="l00205"></a>00205 <span class="keywordflow">switch</span>(*optptr) {<a name="l00206"></a>00206 <span class="keywordflow">case</span> DHCP_OPTION_SUBNET_MASK:<a name="l00207"></a>00207 memcpy(s.<a class="code" href="a00077.html#20541305548441e5dcb2e1e7e6f300eb">netmask</a>, optptr + 2, 4);<a name="l00208"></a>00208 <span class="keywordflow">break</span>;<a name="l00209"></a>00209 <span class="keywordflow">case</span> DHCP_OPTION_ROUTER:<a name="l00210"></a>00210 memcpy(s.<a class="code" href="a00077.html#5e16ca335dfd7394527f602da879fca2">default_router</a>, optptr + 2, 4);<a name="l00211"></a>00211 <span class="keywordflow">break</span>;<a name="l00212"></a>00212 <span class="keywordflow">case</span> DHCP_OPTION_DNS_SERVER:<a name="l00213"></a>00213 memcpy(s.<a class="code" href="a00077.html#27df2817055bc099821d96eb60a40b34">dnsaddr</a>, optptr + 2, 4);<a name="l00214"></a>00214 <span class="keywordflow">break</span>;<a name="l00215"></a>00215 <span class="keywordflow">case</span> DHCP_OPTION_MSG_TYPE:<a name="l00216"></a>00216 type = *(optptr + 2);<a name="l00217"></a>00217 <span class="keywordflow">break</span>;<a name="l00218"></a>00218 <span class="keywordflow">case</span> DHCP_OPTION_SERVER_ID:<a name="l00219"></a>00219 memcpy(s.<a class="code" href="a00077.html#564bab93ef6a268a5de2fab885c1d32a">serverid</a>, optptr + 2, 4);<a name="l00220"></a>00220 <span class="keywordflow">break</span>;<a name="l00221"></a>00221 <span class="keywordflow">case</span> DHCP_OPTION_LEASE_TIME:<a name="l00222"></a>00222 memcpy(s.<a class="code" href="a00077.html#7a520a57d7d0541524f34a7685635597">lease_time</a>, optptr + 2, 4);<a name="l00223"></a>00223 <span class="keywordflow">break</span>;<a name="l00224"></a>00224 <span class="keywordflow">case</span> DHCP_OPTION_END:<a name="l00225"></a>00225 <span class="keywordflow">return</span> type;<a name="l00226"></a>00226 }<a name="l00227"></a>00227 <a name="l00228"></a>00228 optptr += optptr[1] + 2;<a name="l00229"></a>00229 }<a name="l00230"></a>00230 <span class="keywordflow">return</span> type;<a name="l00231"></a>00231 }<a name="l00232"></a>00232 <span class="comment">/*---------------------------------------------------------------------------*/</span><a name="l00233"></a>00233 <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a><a name="l00234"></a>00234 parse_msg(<span class="keywordtype">void</span>)<a name="l00235"></a>00235 {<a name="l00236"></a>00236 <span class="keyword">struct </span>dhcp_msg *m = (<span class="keyword">struct </span>dhcp_msg *)<a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a>;⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -