?lang_form? ?lang_select? ?lang_submit? ?lang_endform?
{HEADER END}
{BLAME START}

library

?curdirlinks? -

Blame information for rev 6

Line No. Rev Author Line
1 6 kaklik <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
2 <html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1">
3 <title>Procyon AVRlib: net/dhcp.c Source File</title>
4 <link href="dox.css" rel="stylesheet" type="text/css">
5 </head><body>
6 <!-- Generated by Doxygen 1.4.2 -->
7 <div class="qindex"><a class="qindex" href="main.html">Main&nbsp;Page</a> | <a class="qindex" href="modules.html">Modules</a> | <a class="qindex" href="annotated.html">Data&nbsp;Structures</a> | <a class="qindex" href="dirs.html">Directories</a> | <a class="qindex" href="files.html">File&nbsp;List</a> | <a class="qindex" href="functions.html">Data&nbsp;Fields</a> | <a class="qindex" href="globals.html">Globals</a> | <a class="qindex" href="pages.html">Related&nbsp;Pages</a></div>
8 <div class="nav">
9 <a class="el" href="dir_000001.html">net</a></div>
10 <h1>dhcp.c</h1><a href="dhcp_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment">00001 <span class="comment">/*! \file dhcp.c \brief DHCP Protocol Library. */</span>
11 00002 <span class="comment">//*****************************************************************************</span>
12 00003 <span class="comment">//</span>
13 00004 <span class="comment">// File Name : 'dhcp.c'</span>
14 00005 <span class="comment">// Title : DHCP Protocol Library</span>
15 00006 <span class="comment">// Author : Pascal Stang</span>
16 00007 <span class="comment">// Created : 9/17/2005</span>
17 00008 <span class="comment">// Revised : 9/17/2005</span>
18 00009 <span class="comment">// Version : 0.1</span>
19 00010 <span class="comment">// Target MCU : Atmel AVR series</span>
20 00011 <span class="comment">// Editor Tabs : 4</span>
21 00012 <span class="comment">//</span>
22 00013 <span class="comment">//*****************************************************************************</span>
23 00014
24 00015 <span class="preprocessor">#include "<a class="code" href="global_8h.html">global.h</a>"</span>
25 00016 <span class="preprocessor">#include "<a class="code" href="net_8h.html">net.h</a>"</span>
26 00017 <span class="preprocessor">#include "<a class="code" href="nic_8h.html">nic.h</a>"</span>
27 00018 <span class="preprocessor">#include "<a class="code" href="ip_8h.html">ip.h</a>"</span>
28 00019 <span class="preprocessor">#include "<a class="code" href="netstack_8h.html">netstack.h</a>"</span>
29 00020
30 00021 <span class="preprocessor">#include "<a class="code" href="dhcp_8h.html">dhcp.h</a>"</span>
31 00022
32 00023 <span class="preprocessor">#include "<a class="code" href="rprintf_8h.html">rprintf.h</a>"</span>
33 00024
34 00025 <span class="comment">// global variables</span>
35 <a name="l00026"></a><a class="code" href="dhcp_8c.html#a0">00026</a> uint32_t <a class="code" href="dhcp_8c.html#a0">DhcpServerIP</a>; <span class="comment">///&lt; IP address of the DHCP server that offered lease</span>
36 <a name="l00027"></a><a class="code" href="dhcp_8c.html#a1">00027</a> <span class="comment"></span>uint32_t <a class="code" href="dhcp_8c.html#a1">DhcpTransactID</a>; <span class="comment">///&lt; Unique transaction ID that identifies DHCP request/replies</span>
37 <a name="l00028"></a><a class="code" href="dhcp_8c.html#a2">00028</a> <span class="comment"></span>uint32_t <a class="code" href="dhcp_8c.html#a2">DhcpLeaseTime</a>; <span class="comment">///&lt; Number of seconds left in DHCP lease</span>
38 00029 <span class="comment"></span>
39 <a name="l00030"></a><a class="code" href="group__dhcp.html#ga1">00030</a> <span class="keywordtype">void</span> <a class="code" href="group__dhcp.html#ga1">dhcpInit</a>(<span class="keywordtype">void</span>)
40 00031 {
41 00032 uint8_t macaddr[6];
42 00033
43 00034 <span class="comment">// get interface mac address</span>
44 00035 nicGetMacAddress(macaddr);
45 00036 <span class="comment">// set transaction ID based on mac address</span>
46 00037 <a class="code" href="dhcp_8c.html#a1">DhcpTransactID</a> = *((uint32_t*)&amp;macaddr);
47 00038 <span class="comment">// reset lease time</span>
48 00039 <a class="code" href="dhcp_8c.html#a2">DhcpLeaseTime</a> = 0;
49 00040 }
50 00041
51 <a name="l00042"></a><a class="code" href="group__dhcp.html#ga2">00042</a> <span class="keywordtype">void</span> <a class="code" href="group__dhcp.html#ga2">dhcpIn</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> len, <span class="keyword">struct</span> <a class="code" href="structnetDhcpHeader.html">netDhcpHeader</a>* packet)
52 00043 {
53 00044 uint8_t msgtype;
54 00045 uint32_t sid;
55 00046 uint8_t* optptr;
56 00047 uint32_t val;
57 00048 uint32_t netmask;
58 00049 uint32_t gateway;
59 00050
60 00051 <span class="preprocessor"> #if NET_DEBUG &gt;= 3</span>
61 00052 <span class="preprocessor"></span> <a class="code" href="group__dhcp.html#ga8">dhcpPrintHeader</a>(packet);
62 00053 <span class="preprocessor"> #endif</span>
63 00054 <span class="preprocessor"></span>
64 00055 <span class="comment">// check that this is a reply, and for me</span>
65 00056 <span class="keywordflow">if</span>((packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o0">op</a> != <a class="code" href="group__dhcp.html#ga11">BOOTP_OP_BOOTREPLY</a>) || (packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o4">xid</a> != <a class="code" href="dhcp_8c.html#a1">DhcpTransactID</a>))
66 00057 <span class="keywordflow">return</span>;
67 00058
68 00059 <span class="comment">// process incoming packet</span>
69 00060 <span class="comment">// check reply type</span>
70 00061 <a class="code" href="group__dhcp.html#ga6">dhcpGetOption</a>(packet-&gt;<a class="code" href="structnetDhcpHeader.html#o2">options</a>, <a class="code" href="group__dhcp.html#ga27">DHCP_OPT_DHCPMSGTYPE</a>, 1, &amp;msgtype);
71 00062 <span class="preprocessor"> #if NET_DEBUG &gt;= 2</span>
72 00063 <span class="preprocessor"></span> rprintf(<span class="stringliteral">"DHCP: Received msgtype = %d\r\n"</span>, msgtype);
73 00064 <span class="preprocessor"> #endif</span>
74 00065 <span class="preprocessor"></span>
75 00066 <span class="keywordflow">if</span>(msgtype == <a class="code" href="group__dhcp.html#ga34">DHCP_MSG_DHCPOFFER</a>)
76 00067 {
77 00068 <span class="comment">// get DHCP server ID</span>
78 00069 <a class="code" href="group__dhcp.html#ga6">dhcpGetOption</a>(packet-&gt;<a class="code" href="structnetDhcpHeader.html#o2">options</a>, <a class="code" href="group__dhcp.html#ga28">DHCP_OPT_SERVERID</a>, 4, &amp;sid);
79 00070 <span class="preprocessor"> #ifdef DHCP_DEBUG</span>
80 00071 <span class="preprocessor"></span> <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"DHCP: Got offer from server "</span>); <a class="code" href="group__net.html#ga6">netPrintIPAddr</a>(<a class="code" href="group__net.html#ga3">htonl</a>(sid)); <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
81 00072 <span class="preprocessor"> #endif</span>
82 00073 <span class="preprocessor"></span>
83 00074 <span class="comment">// build DHCP request (on top of this reply)</span>
84 00075 packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o0">op</a> = <a class="code" href="group__dhcp.html#ga10">BOOTP_OP_BOOTREQUEST</a>; <span class="comment">// request type</span>
85 00076 <span class="comment">// set operation</span>
86 00077 val = <a class="code" href="group__dhcp.html#ga35">DHCP_MSG_DHCPREQUEST</a>;
87 00078 optptr = <a class="code" href="group__dhcp.html#ga7">dhcpSetOption</a>(packet-&gt;<a class="code" href="structnetDhcpHeader.html#o2">options</a>, <a class="code" href="group__dhcp.html#ga27">DHCP_OPT_DHCPMSGTYPE</a>, 1, &amp;val);
88 00079 <span class="comment">// set the server ID</span>
89 00080 optptr = <a class="code" href="group__dhcp.html#ga7">dhcpSetOption</a>(optptr, <a class="code" href="group__dhcp.html#ga28">DHCP_OPT_SERVERID</a>, 4, &amp;sid);
90 00081 <span class="comment">// request the IP previously offered</span>
91 00082 optptr = <a class="code" href="group__dhcp.html#ga7">dhcpSetOption</a>(optptr, <a class="code" href="group__dhcp.html#ga25">DHCP_OPT_REQUESTEDIP</a>, 4, &amp;packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o8">yiaddr</a>);
92 00083 <span class="comment">// request additional information</span>
93 00084 ((uint8_t*)&amp;val)[0] = <a class="code" href="group__dhcp.html#ga18">DHCP_OPT_NETMASK</a>;
94 00085 ((uint8_t*)&amp;val)[1] = <a class="code" href="group__dhcp.html#ga19">DHCP_OPT_ROUTERS</a>;
95 00086 ((uint8_t*)&amp;val)[2] = <a class="code" href="group__dhcp.html#ga22">DHCP_OPT_DNSSERVERS</a>;
96 00087 ((uint8_t*)&amp;val)[3] = <a class="code" href="group__dhcp.html#ga24">DHCP_OPT_DOMAINNAME</a>;
97 00088 optptr = <a class="code" href="group__dhcp.html#ga7">dhcpSetOption</a>(optptr, <a class="code" href="group__dhcp.html#ga29">DHCP_OPT_PARAMREQLIST</a>, 4, &amp;val);
98 00089
99 00090 <span class="preprocessor"> #ifdef DHCP_DEBUG</span>
100 00091 <span class="preprocessor"></span> <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"DHCP: Sending request in response to offer\r\n"</span>);
101 00092 <span class="preprocessor"> #endif</span>
102 00093 <span class="preprocessor"></span> <span class="comment">// send DHCP request</span>
103 00094 <a class="code" href="dhcp_8c.html#a0">DhcpServerIP</a> = <a class="code" href="group__net.html#ga3">htonl</a>(sid);
104 00095 <a class="code" href="group__ip.html#ga4">udpSend</a>(<a class="code" href="dhcp_8c.html#a0">DhcpServerIP</a>, <a class="code" href="group__dhcp.html#ga15">DHCP_UDP_SERVER_PORT</a>, <a class="code" href="group__dhcp.html#ga14">DHCP_HEADER_LEN</a>+3+6+6+6+1, (uint8_t*)packet);
105 00096
106 00097 }
107 00098 <span class="keywordflow">else</span> <span class="keywordflow">if</span>(msgtype == <a class="code" href="group__dhcp.html#ga37">DHCP_MSG_DHCPACK</a>)
108 00099 {
109 00100 <span class="comment">// get netmask</span>
110 00101 <a class="code" href="group__dhcp.html#ga6">dhcpGetOption</a>(packet-&gt;<a class="code" href="structnetDhcpHeader.html#o2">options</a>, <a class="code" href="group__dhcp.html#ga18">DHCP_OPT_NETMASK</a>, 4, &amp;val);
111 00102 netmask = <a class="code" href="group__net.html#ga3">htonl</a>(val);
112 00103 <span class="comment">// get gateway</span>
113 00104 <a class="code" href="group__dhcp.html#ga6">dhcpGetOption</a>(packet-&gt;<a class="code" href="structnetDhcpHeader.html#o2">options</a>, <a class="code" href="group__dhcp.html#ga19">DHCP_OPT_ROUTERS</a>, 4, &amp;val);
114 00105 gateway = <a class="code" href="group__net.html#ga3">htonl</a>(val);
115 00106 <span class="comment">// get gateway</span>
116 00107 <a class="code" href="group__dhcp.html#ga6">dhcpGetOption</a>(packet-&gt;<a class="code" href="structnetDhcpHeader.html#o2">options</a>, <a class="code" href="group__dhcp.html#ga26">DHCP_OPT_LEASETIME</a>, 4, &amp;val);
117 00108 <a class="code" href="dhcp_8c.html#a2">DhcpLeaseTime</a> = <a class="code" href="group__net.html#ga3">htonl</a>(val);
118 00109
119 00110 <span class="comment">// assign new network info</span>
120 00111 <a class="code" href="group__ip.html#ga0">ipSetConfig</a>(<a class="code" href="group__net.html#ga3">htonl</a>(packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o8">yiaddr</a>), netmask, gateway);
121 00112
122 00113 <span class="preprocessor"> #ifdef DHCP_DEBUG</span>
123 00114 <span class="preprocessor"></span> rprintf(<span class="stringliteral">"DHCP: Got request ACK, bind complete\r\n"</span>);
124 00115 <span class="comment">//debugPrintHexTable(len-DHCP_HEADER_LEN, (packet-&gt;options));</span>
125 00116 <span class="comment">// print info</span>
126 00117 <a class="code" href="group__ip.html#ga2">ipPrintConfig</a>(<a class="code" href="group__ip.html#ga1">ipGetConfig</a>());
127 00118 <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"LeaseTm : "</span>); <a class="code" href="group__rprintf.html#ga10">rprintfNum</a>(10,8,FALSE,<span class="charliteral">' '</span>,<a class="code" href="dhcp_8c.html#a2">DhcpLeaseTime</a>); <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
128 00119 <span class="preprocessor"> #endif</span>
129 00120 <span class="preprocessor"></span> }
130 00121 }
131 00122
132 <a name="l00123"></a><a class="code" href="group__dhcp.html#ga3">00123</a> <span class="keywordtype">void</span> <a class="code" href="group__dhcp.html#ga3">dhcpRequest</a>(<span class="keywordtype">void</span>)
133 00124 {
134 00125 <span class="keyword">struct </span><a class="code" href="structnetDhcpHeader.html">netDhcpHeader</a>* packet;
135 00126 uint32_t val;
136 00127
137 00128 packet = (<span class="keyword">struct </span><a class="code" href="structnetDhcpHeader.html">netDhcpHeader</a>*)&amp;<a class="code" href="group__netstack.html#ga1">netstackGetBuffer</a>()[ETH_HEADER_LEN+IP_HEADER_LEN+UDP_HEADER_LEN];
138 00129
139 00130 <span class="comment">// build BOOTP/DHCP header</span>
140 00131 packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o0">op</a> = <a class="code" href="group__dhcp.html#ga10">BOOTP_OP_BOOTREQUEST</a>; <span class="comment">// request type</span>
141 00132 packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o1">htype</a> = BOOTP_HTYPE_ETHERNET;
142 00133 packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o2">hlen</a> = BOOTP_HLEN_ETHERNET;
143 00134 packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o7">ciaddr</a> = <a class="code" href="group__net.html#ga3">htonl</a>(<a class="code" href="group__ip.html#ga1">ipGetConfig</a>()-&gt;ip);
144 00135 packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o8">yiaddr</a> = <a class="code" href="group__net.html#ga34">HTONL</a>(0l);
145 00136 packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o9">siaddr</a> = <a class="code" href="group__net.html#ga34">HTONL</a>(0l);
146 00137 packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o10">giaddr</a> = <a class="code" href="group__net.html#ga34">HTONL</a>(0l);
147 00138 nicGetMacAddress(&amp;packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o11">chaddr</a>[0]); <span class="comment">// fill client hardware address</span>
148 00139 packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o4">xid</a> = <a class="code" href="dhcp_8c.html#a1">DhcpTransactID</a>;
149 00140 packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o6">flags</a> = <a class="code" href="group__net.html#ga33">HTONS</a>(1);
150 00141
151 00142 <span class="comment">// build DHCP request</span>
152 00143 <span class="comment">// begin with magic cookie</span>
153 00144 packet-&gt;<a class="code" href="structnetDhcpHeader.html#o1">cookie</a> = 0x63538263;
154 00145 <span class="comment">// set operation</span>
155 00146 val = <a class="code" href="group__dhcp.html#ga33">DHCP_MSG_DHCPDISCOVER</a>;
156 00147 <a class="code" href="group__dhcp.html#ga7">dhcpSetOption</a>(packet-&gt;<a class="code" href="structnetDhcpHeader.html#o2">options</a>, <a class="code" href="group__dhcp.html#ga27">DHCP_OPT_DHCPMSGTYPE</a>, 1, &amp;val);
157 00148
158 00149 <span class="preprocessor"> #ifdef DHCP_DEBUG</span>
159 00150 <span class="preprocessor"></span> <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"DHCP: Sending Query\r\n"</span>);
160 00151 <span class="comment">//dhcpPrintHeader(packet);</span>
161 00152 <span class="preprocessor"> #endif</span>
162 00153 <span class="preprocessor"></span>
163 00154 <span class="comment">// send request</span>
164 00155 <a class="code" href="group__ip.html#ga4">udpSend</a>(0xFFFFFFFF, <a class="code" href="group__dhcp.html#ga15">DHCP_UDP_SERVER_PORT</a>, <a class="code" href="group__dhcp.html#ga14">DHCP_HEADER_LEN</a>+3+1, (uint8_t*)packet);
165 00156 }
166 00157
167 <a name="l00158"></a><a class="code" href="group__dhcp.html#ga4">00158</a> <span class="keywordtype">void</span> <a class="code" href="group__dhcp.html#ga4">dhcpRelease</a>(<span class="keywordtype">void</span>)
168 00159 {
169 00160 <span class="keyword">struct </span><a class="code" href="structnetDhcpHeader.html">netDhcpHeader</a>* packet;
170 00161 uint32_t val;
171 00162 uint8_t* optptr;
172 00163
173 00164 packet = (<span class="keyword">struct </span><a class="code" href="structnetDhcpHeader.html">netDhcpHeader</a>*)&amp;<a class="code" href="group__netstack.html#ga1">netstackGetBuffer</a>()[ETH_HEADER_LEN+IP_HEADER_LEN+UDP_HEADER_LEN];
174 00165
175 00166 <span class="comment">// build BOOTP/DHCP header</span>
176 00167 packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o0">op</a> = <a class="code" href="group__dhcp.html#ga10">BOOTP_OP_BOOTREQUEST</a>; <span class="comment">// request type</span>
177 00168 packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o1">htype</a> = BOOTP_HTYPE_ETHERNET;
178 00169 packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o2">hlen</a> = BOOTP_HLEN_ETHERNET;
179 00170 packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o7">ciaddr</a> = <a class="code" href="group__net.html#ga3">htonl</a>(<a class="code" href="group__ip.html#ga1">ipGetConfig</a>()-&gt;ip);
180 00171 packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o8">yiaddr</a> = <a class="code" href="group__net.html#ga34">HTONL</a>(0l);
181 00172 packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o9">siaddr</a> = <a class="code" href="group__net.html#ga34">HTONL</a>(0l);
182 00173 packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o10">giaddr</a> = <a class="code" href="group__net.html#ga34">HTONL</a>(0l);
183 00174 nicGetMacAddress(&amp;packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o11">chaddr</a>[0]); <span class="comment">// fill client hardware address</span>
184 00175 packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o4">xid</a> = <a class="code" href="dhcp_8c.html#a1">DhcpTransactID</a>; <span class="comment">// set trans ID (use part of MAC address)</span>
185 00176 packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o6">flags</a> = <a class="code" href="group__net.html#ga33">HTONS</a>(1);
186 00177
187 00178 <span class="comment">// build DHCP request</span>
188 00179 <span class="comment">// begin with magic cookie</span>
189 00180 packet-&gt;<a class="code" href="structnetDhcpHeader.html#o1">cookie</a> = 0x63538263;
190 00181 <span class="comment">// set operation</span>
191 00182 val = <a class="code" href="group__dhcp.html#ga39">DHCP_MSG_DHCPRELEASE</a>;
192 00183 optptr = <a class="code" href="group__dhcp.html#ga7">dhcpSetOption</a>(packet-&gt;<a class="code" href="structnetDhcpHeader.html#o2">options</a>, <a class="code" href="group__dhcp.html#ga27">DHCP_OPT_DHCPMSGTYPE</a>, 1, &amp;val);
193 00184 <span class="comment">// set the server ID</span>
194 00185 val = <a class="code" href="group__net.html#ga3">htonl</a>(<a class="code" href="dhcp_8c.html#a0">DhcpServerIP</a>);
195 00186 optptr = <a class="code" href="group__dhcp.html#ga7">dhcpSetOption</a>(optptr, <a class="code" href="group__dhcp.html#ga28">DHCP_OPT_SERVERID</a>, 4, &amp;val);
196 00187 <span class="comment">// request the IP previously offered</span>
197 00188 optptr = <a class="code" href="group__dhcp.html#ga7">dhcpSetOption</a>(optptr, <a class="code" href="group__dhcp.html#ga25">DHCP_OPT_REQUESTEDIP</a>, 4, &amp;packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o7">ciaddr</a>);
198 00189
199 00190 <span class="preprocessor"> #ifdef DHCP_DEBUG</span>
200 00191 <span class="preprocessor"></span> <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"DHCP: Sending Release to "</span>); <a class="code" href="group__net.html#ga6">netPrintIPAddr</a>(<a class="code" href="dhcp_8c.html#a0">DhcpServerIP</a>); <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
201 00192 <span class="comment">//dhcpPrintHeader(packet);</span>
202 00193 <span class="preprocessor"> #endif</span>
203 00194 <span class="preprocessor"></span>
204 00195 <span class="comment">// send release</span>
205 00196 <a class="code" href="group__ip.html#ga4">udpSend</a>(<a class="code" href="dhcp_8c.html#a0">DhcpServerIP</a>, <a class="code" href="group__dhcp.html#ga15">DHCP_UDP_SERVER_PORT</a>, <a class="code" href="group__dhcp.html#ga14">DHCP_HEADER_LEN</a>+3+6+6+1, (uint8_t*)packet);
206 00197
207 00198 <span class="comment">// deconfigure ip addressing</span>
208 00199 <a class="code" href="group__ip.html#ga0">ipSetConfig</a>(0,0,0);
209 00200 <a class="code" href="dhcp_8c.html#a2">DhcpLeaseTime</a> = 0;
210 00201 }
211 00202
212 <a name="l00203"></a><a class="code" href="group__dhcp.html#ga5">00203</a> <span class="keywordtype">void</span> <a class="code" href="group__dhcp.html#ga5">dhcpTimer</a>(<span class="keywordtype">void</span>)
213 00204 {
214 00205 <span class="comment">// this function to be called once per second</span>
215 00206
216 00207 <span class="comment">// decrement lease time</span>
217 00208 <span class="keywordflow">if</span>(<a class="code" href="dhcp_8c.html#a2">DhcpLeaseTime</a>)
218 00209 <a class="code" href="dhcp_8c.html#a2">DhcpLeaseTime</a>--;
219 00210 }
220 00211
221 <a name="l00212"></a><a class="code" href="group__dhcp.html#ga6">00212</a> uint8_t <a class="code" href="group__dhcp.html#ga6">dhcpGetOption</a>(uint8_t* <a class="code" href="structnetDhcpHeader.html#o2">options</a>, uint8_t optcode, uint8_t optlen, <span class="keywordtype">void</span>* optvalptr)
222 00213 {
223 00214 uint8_t i;
224 00215
225 00216 <span class="comment">// parse for desired option</span>
226 00217 <span class="keywordflow">for</span> (;;)
227 00218 {
228 00219 <span class="comment">// skip pad characters</span>
229 00220 <span class="keywordflow">if</span>(*options == <a class="code" href="group__dhcp.html#ga17">DHCP_OPT_PAD</a>)
230 00221 options++;
231 00222 <span class="comment">// break if end reached</span>
232 00223 <span class="keywordflow">else</span> <span class="keywordflow">if</span>(*options == <a class="code" href="group__dhcp.html#ga32">DHCP_OPT_END</a>)
233 00224 <span class="keywordflow">break</span>;
234 00225 <span class="comment">// check for desired option</span>
235 00226 <span class="keywordflow">else</span> <span class="keywordflow">if</span>(*options == optcode)
236 00227 {
237 00228 <span class="comment">// found desired option</span>
238 00229 <span class="comment">// limit size to actual option length</span>
239 00230 optlen = MIN(optlen, *(options+1));
240 00231 <span class="comment">//if(*(options+1) &lt; optlen)</span>
241 00232 <span class="comment">// optlen = *(options+1);</span>
242 00233
243 00234 <span class="comment">// copy contents of option</span>
244 00235 <span class="keywordflow">for</span>(i=0; i&lt;optlen; i++)
245 00236 *(((uint8_t*)optvalptr)+i) = *(options+i+2);
246 00237 <span class="comment">// return length of option</span>
247 00238 <span class="keywordflow">return</span> *(options+1);
248 00239 }
249 00240 <span class="keywordflow">else</span>
250 00241 {
251 00242 <span class="comment">// skip to next option</span>
252 00243 options++;
253 00244 options+=*options;
254 00245 options++;
255 00246 }
256 00247 }
257 00248 <span class="comment">// failed to find desired option</span>
258 00249 <span class="keywordflow">return</span> 0;
259 00250 }
260 00251
261 00252
262 <a name="l00253"></a><a class="code" href="group__dhcp.html#ga7">00253</a> uint8_t* <a class="code" href="group__dhcp.html#ga7">dhcpSetOption</a>(uint8_t* <a class="code" href="structnetDhcpHeader.html#o2">options</a>, uint8_t optcode, uint8_t optlen, <span class="keywordtype">void</span>* optvalptr)
263 00254 {
264 00255 <span class="comment">// use current options address as write point</span>
265 00256
266 00257 <span class="comment">// set optcode</span>
267 00258 *options++ = optcode;
268 00259 <span class="comment">// set optlen</span>
269 00260 *options++ = optlen;
270 00261 <span class="comment">// copy in argument/data</span>
271 00262 <span class="keywordflow">while</span>(optlen--)
272 00263 {
273 00264 *options++ = *(uint8_t*)optvalptr++;
274 00265 }
275 00266 <span class="comment">// write end marker</span>
276 00267 *options = <a class="code" href="group__dhcp.html#ga32">DHCP_OPT_END</a>;
277 00268
278 00269 <span class="comment">// return address of end marker, to be used as a future write point</span>
279 00270 <span class="keywordflow">return</span> options;
280 00271 }
281 00272
282 00273
283 00274 <span class="preprocessor">#ifdef DHCP_DEBUG_PRINT</span>
284 00275 <span class="preprocessor"></span><span class="keywordtype">void</span> <a class="code" href="group__dhcp.html#ga8">dhcpPrintHeader</a>(<span class="keyword">struct</span> <a class="code" href="structnetDhcpHeader.html">netDhcpHeader</a>* packet)
285 00276 {
286 00277 <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"DHCP Packet:\r\n"</span>);
287 00278 <span class="comment">// print op</span>
288 00279 <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"Op : "</span>);
289 00280 <span class="keywordflow">switch</span>(packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o0">op</a>)
290 00281 {
291 00282 <span class="keywordflow">case</span> <a class="code" href="group__dhcp.html#ga10">BOOTP_OP_BOOTREQUEST</a>: <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"BOOTREQUEST"</span>); <span class="keywordflow">break</span>;
292 00283 <span class="keywordflow">case</span> <a class="code" href="group__dhcp.html#ga11">BOOTP_OP_BOOTREPLY</a>: <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"BOOTREPLY"</span>); <span class="keywordflow">break</span>;
293 00284 <span class="keywordflow">default</span>: <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"UNKNOWN"</span>); <span class="keywordflow">break</span>;
294 00285 }
295 00286 <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
296 00287 <span class="comment">// print transaction ID</span>
297 00288 <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"XID : 0x"</span>); <a class="code" href="group__rprintf.html#ga9">rprintfu32</a>(packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o4">xid</a>); <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
298 00289 <span class="comment">// print client IP address</span>
299 00290 <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"ClIpAddr: "</span>); <a class="code" href="group__net.html#ga6">netPrintIPAddr</a>(<a class="code" href="group__net.html#ga3">htonl</a>(packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o7">ciaddr</a>)); <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
300 00291 <span class="comment">// print 'your' IP address</span>
301 00292 <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"YrIpAddr: "</span>); <a class="code" href="group__net.html#ga6">netPrintIPAddr</a>(<a class="code" href="group__net.html#ga3">htonl</a>(packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o8">yiaddr</a>)); <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
302 00293 <span class="comment">// print server IP address</span>
303 00294 <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"SvIpAddr: "</span>); <a class="code" href="group__net.html#ga6">netPrintIPAddr</a>(<a class="code" href="group__net.html#ga3">htonl</a>(packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o9">siaddr</a>)); <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
304 00295 <span class="comment">// print gateway IP address</span>
305 00296 <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"GwIpAddr: "</span>); <a class="code" href="group__net.html#ga6">netPrintIPAddr</a>(<a class="code" href="group__net.html#ga3">htonl</a>(packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o10">giaddr</a>)); <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
306 00297 <span class="comment">// print client hardware address</span>
307 00298 <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"ClHwAddr: "</span>); <a class="code" href="group__net.html#ga5">netPrintEthAddr</a>((<span class="keyword">struct</span> netEthAddr*)packet-&gt;<a class="code" href="structnetDhcpHeader.html#o0">bootp</a>.<a class="code" href="structnetBootpHeader.html#o11">chaddr</a>); <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
308 00299 }
309 00300 <span class="preprocessor">#endif</span>
310 </pre></div><hr size="1"><address style="align: right;"><small>Generated on Sun Oct 29 03:41:07 2006 for Procyon AVRlib by&nbsp;
311 <a href="http://www.doxygen.org/index.html">
312 <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.2 </small></address>
313 </body>
314 </html>
{BLAME END}
{FOOTER START}

Powered by WebSVN v2.8.3