📄 dhcpc_8c-source.html
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>/opentcp/dhcp/dhcpc.c Source File</title><link href="doxygen.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.2.18 --><center><a class="qindex" href="main.html">Main Page</a> <a class="qindex" href="modules.html">Modules</a> <a class="qindex" href="annotated.html">Data Structures</a> <a class="qindex" href="files.html">File List</a> <a class="qindex" href="functions.html">Data Fields</a> <a class="qindex" href="globals.html">Globals</a> <a class="qindex" href="pages.html">Related Pages</a> <a class="qindex" href="examples.html">Examples</a> </center><hr><h1>/opentcp/dhcp/dhcpc.c</h1><a href="dhcpc_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 <span class="comment">/*</span>00002 <span class="comment"> *Copyright (c) 2000-2002 Viola Systems Ltd.</span>00003 <span class="comment"> *All rights reserved.</span>00004 <span class="comment"> *</span>00005 <span class="comment"> *Redistribution and use in source and binary forms, with or without </span>00006 <span class="comment"> *modification, are permitted provided that the following conditions </span>00007 <span class="comment"> *are met:</span>00008 <span class="comment"> *</span>00009 <span class="comment"> *1. Redistributions of source code must retain the above copyright </span>00010 <span class="comment"> *notice, this list of conditions and the following disclaimer.</span>00011 <span class="comment"> *</span>00012 <span class="comment"> *2. Redistributions in binary form must reproduce the above copyright </span>00013 <span class="comment"> *notice, this list of conditions and the following disclaimer in the </span>00014 <span class="comment"> *documentation and/or other materials provided with the distribution.</span>00015 <span class="comment"> *</span>00016 <span class="comment"> *3. The end-user documentation included with the redistribution, if </span>00017 <span class="comment"> *any, must include the following acknowledgment:</span>00018 <span class="comment"> * "This product includes software developed by Viola </span>00019 <span class="comment"> * Systems (http://www.violasystems.com/)."</span>00020 <span class="comment"> *</span>00021 <span class="comment"> *Alternately, this acknowledgment may appear in the software itself, </span>00022 <span class="comment"> *if and wherever such third-party acknowledgments normally appear.</span>00023 <span class="comment"> *</span>00024 <span class="comment"> *4. The names "OpenTCP" and "Viola Systems" must not be used to </span>00025 <span class="comment"> *endorse or promote products derived from this software without prior </span>00026 <span class="comment"> *written permission. For written permission, please contact </span>00027 <span class="comment"> *opentcp@opentcp.org.</span>00028 <span class="comment"> *</span>00029 <span class="comment"> *5. Products derived from this software may not be called "OpenTCP", </span>00030 <span class="comment"> *nor may "OpenTCP" appear in their name, without prior written </span>00031 <span class="comment"> *permission of the Viola Systems Ltd.</span>00032 <span class="comment"> *</span>00033 <span class="comment"> *THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED </span>00034 <span class="comment"> *WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF </span>00035 <span class="comment"> *MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. </span>00036 <span class="comment"> *IN NO EVENT SHALL VIOLA SYSTEMS LTD. OR ITS CONTRIBUTORS BE LIABLE </span>00037 <span class="comment"> *FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR </span>00038 <span class="comment"> *CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF </span>00039 <span class="comment"> *SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR </span>00040 <span class="comment"> *BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, </span>00041 <span class="comment"> *WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE </span>00042 <span class="comment"> *OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, </span>00043 <span class="comment"> *EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>00044 <span class="comment"> *====================================================================</span>00045 <span class="comment"> *</span>00046 <span class="comment"> *OpenTCP is the unified open source TCP/IP stack available on a series </span>00047 <span class="comment"> *of 8/16-bit microcontrollers, please see <http://www.opentcp.org>.</span>00048 <span class="comment"> *</span>00049 <span class="comment"> *For more information on how to network-enable your devices, or how to </span>00050 <span class="comment"> *obtain commercial technical support for OpenTCP, please see </span>00051 <span class="comment"> *<http://www.violasystems.com/>.</span>00052 <span class="comment"> */</span>00053 00071 <span class="preprocessor">#include<<a class="code" href="datatypes_8h.html">inet/datatypes.h</a>></span>00072 <span class="preprocessor">#include<<a class="code" href="debug_8h.html">inet/debug.h</a>></span>00073 <span class="preprocessor">#include<<a class="code" href="system_8h.html">inet/system.h</a>></span>00074 <span class="preprocessor">#include<<a class="code" href="tcp__ip_8h.html">inet/tcp_ip.h</a>></span>00075 <span class="preprocessor">#include<<a class="code" href="timers_8h.html">inet/timers.h</a>></span>00076 <span class="preprocessor">#include<<a class="code" href="arp_8h.html">inet/arp.h</a>></span>00077 <span class="preprocessor">#include<<a class="code" href="ethernet_8h.html">inet/ethernet.h</a>></span>00078 <span class="preprocessor">#include<<a class="code" href="dhcpc_8h.html">inet/dhcp/dhcpc.h</a>></span>00079 <a name="l00087"></a><a class="code" href="dhcpc_8c.html#a0">00087</a> UINT8 <a class="code" href="dhcpc_8c.html#a0">dhcpc_state</a>;00088 <a name="l00094"></a><a class="code" href="dhcpc_8c.html#a1">00094</a> UINT8 <a class="code" href="dhcpc_8c.html#a1">dhcpc_timer_handle</a>;00095 <a name="l00100"></a><a class="code" href="dhcpc_8c.html#a2">00100</a> INT8 <a class="code" href="dhcpc_8c.html#a2">dhcpc_soc_handle</a>;00101 <a name="l00106"></a><a class="code" href="dhcpc_8c.html#a3">00106</a> UINT8 <a class="code" href="dhcpc_8c.html#a3">dhcpc_initialized</a>=0;00107 <a name="l00115"></a><a class="code" href="dhcpc_8c.html#a4">00115</a> UINT32 <a class="code" href="dhcpc_8c.html#a4">dhcpc_t1</a>;00116 <a name="l00124"></a><a class="code" href="dhcpc_8c.html#a5">00124</a> UINT32 <a class="code" href="dhcpc_8c.html#a5">dhcpc_t2</a>;00125 <a name="l00131"></a><a class="code" href="dhcpc_8c.html#a6">00131</a> UINT32 <a class="code" href="dhcpc_8c.html#a6">dhcpc_server_identifier</a>;00132 <a name="l00140"></a><a class="code" href="dhcpc_8c.html#a7">00140</a> UINT32 <a class="code" href="dhcpc_8c.html#a7">dhcpc_requested_ip</a>;00141 00142 INT32 <a class="code" href="dhcpc_8c.html#a8">dhcpc_eventlistener</a>(INT8 cbhandle, UINT8 event, UINT32 ipaddr, UINT16 port, UINT16 buffindex, UINT16 datalen);00143 INT8 <a class="code" href="dhcpc_8c.html#a9">dhcpc_send_message</a>(UINT8 msg_type);00144 <a name="l00158"></a><a class="code" href="dhcpc_8c.html#a10">00158</a> INT8 <a class="code" href="dhcpc_8c.html#a10">dhcpc_init</a>(<span class="keywordtype">void</span>)00159 {00160 00161 <span class="comment">/* If we already have some IP address (stored from some previous</span>00162 <span class="comment"> * requests, try obtaining it again */</span> 00163 <span class="keywordflow">if</span>((localmachine.localip!=0)&&(localmachine.localip!=0xffffffff)){00164 <a class="code" href="dhcpc_8c.html#a0">dhcpc_state</a>=DHCP_STATE_INIT_REBOOT;00165 }<span class="keywordflow">else</span>{00166 <span class="comment">/* start from beginning */</span>00167 <a class="code" href="dhcpc_8c.html#a0">dhcpc_state</a>=DHCP_STATE_INIT;00168 }00169 00170 <a class="code" href="dhcpc_8c.html#a2">dhcpc_soc_handle</a>=<a class="code" href="udp_8c.html#a3">udp_getsocket</a>(0,<a class="code" href="dhcpc_8c.html#a8">dhcpc_eventlistener</a>,<a class="code" href="tcp__ip_8h.html#a5">UDP_OPT_SEND_CS</a>|<a class="code" href="tcp__ip_8h.html#a6">UDP_OPT_CHECK_CS</a>);00171 00172 <span class="keywordflow">if</span>(<a class="code" href="dhcpc_8c.html#a2">dhcpc_soc_handle</a><0){00173 DEBUGOUT(<span class="stringliteral">"DHCP client not able to obtain socket!\r\n"</span>);00174 <span class="keywordflow">return</span> (-1);00175 } 00176 00177 <span class="comment">/* open socket for communication immediately */</span>00178 <a class="code" href="udp_8c.html#a5">udp_open</a>(<a class="code" href="dhcpc_8c.html#a2">dhcpc_soc_handle</a>,DHCP_CLIENT_PORT);00179 00180 <span class="comment">/* get timer handle */</span>00181 <a class="code" href="dhcpc_8c.html#a1">dhcpc_timer_handle</a>=<a class="code" href="timers_8c.html#a2">get_timer</a>();00182 00183 <span class="comment">/* initialize timer for 1 sec intervals */</span>00184 <a class="code" href="timers_8c.html#a6">init_timer</a>(<a class="code" href="dhcpc_8c.html#a1">dhcpc_timer_handle</a>,<a class="code" href="timers_8h.html#a1">TIMERTIC</a>*1); <span class="comment">/* on every second */</span>00185 00186 <a class="code" href="dhcpc_8c.html#a3">dhcpc_initialized</a>=1;00187 DEBUGOUT(<span class="stringliteral">"DHCP Client initialized\r\n"</span>);00188 00189 <span class="keywordflow">return</span> (0);00190 }00191 <a name="l00201"></a><a class="code" href="dhcpc_8c.html#a11">00201</a> <span class="keywordtype">void</span> <a class="code" href="dhcpc_8c.html#a11">dhcpc_run</a>(<span class="keywordtype">void</span>){00202 UINT8 sec=0;00203 00204 <span class="keywordflow">if</span>(!<a class="code" href="dhcpc_8c.html#a3">dhcpc_initialized</a>)00205 <span class="keywordflow">return</span>;00206 00207 <span class="keywordflow">if</span>(!<a class="code" href="timers_8c.html#a7">check_timer</a>(<a class="code" href="dhcpc_8c.html#a1">dhcpc_timer_handle</a>))00208 sec=1;00209 00210 <span class="keywordflow">switch</span>(dhcpc_state){00211 <span class="keywordflow">case</span> DHCP_STATE_INIT_REBOOT:00212 <a class="code" href="dhcpc_8c.html#a0">dhcpc_state</a>=DHCP_STATE_REBOOTING;00213 <a class="code" href="dhcpc_8c.html#a4">dhcpc_t1</a>=4; <span class="comment">/* next retransmission in 4 secs */</span>00214 <a class="code" href="dhcpc_8c.html#a5">dhcpc_t2</a>=8; <span class="comment">/* after that after 8 secs retrs */</span>00215 <a class="code" href="dhcpc_8c.html#a7">dhcpc_requested_ip</a>=localmachine.localip;00216 <a class="code" href="dhcpc_8c.html#a9">dhcpc_send_message</a>(DHCP_REQUEST);00217 <span class="keywordflow">break</span>;⌨️ 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 + -