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3 | <title>Procyon AVRlib: net/netstack.c Source File</title> |
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10 | <h1>netstack.c</h1><a href="netstack_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment">00001 <span class="comment">/*! \file netstack.c \brief Network Stack. */</span> |
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11 | 00002 <span class="comment">//*****************************************************************************</span> |
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12 | 00003 <span class="comment">//</span> |
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13 | 00004 <span class="comment">// File Name : 'netstack.c'</span> |
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14 | 00005 <span class="comment">// Title : Network Stack</span> |
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15 | 00006 <span class="comment">// Author : Pascal Stang</span> |
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16 | 00007 <span class="comment">// Created : 6/28/2005</span> |
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17 | 00008 <span class="comment">// Revised : 9/20/2005</span> |
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18 | 00009 <span class="comment">// Version : 0.3</span> |
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19 | 00010 <span class="comment">// Target MCU : Atmel AVR series</span> |
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20 | 00011 <span class="comment">// Editor Tabs : 4</span> |
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21 | 00012 <span class="comment">//</span> |
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22 | 00013 <span class="comment">//*****************************************************************************</span> |
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23 | 00014 |
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24 | 00015 <span class="preprocessor">#include "<a class="code" href="rprintf_8h.html">rprintf.h</a>"</span> |
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25 | 00016 <span class="preprocessor">#include "<a class="code" href="debug_8h.html">debug.h</a>"</span> |
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26 | 00017 |
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27 | 00018 <span class="preprocessor">#include "<a class="code" href="netstack_8h.html">netstack.h</a>"</span> |
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28 | 00019 |
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29 | 00020 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> NetBuffer[<a class="code" href="group__netstack.html#ga6">NETSTACK_BUFFERSIZE</a>]; |
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30 | 00021 |
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31 | <a name="l00022"></a><a class="code" href="group__netstack.html#ga0">00022</a> <span class="keywordtype">void</span> <a class="code" href="group__netstack.html#ga0">netstackInit</a>(uint32_t ipaddress, uint32_t netmask, uint32_t gatewayip) |
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32 | 00023 { |
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33 | 00024 <span class="comment">// init network device driver</span> |
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34 | 00025 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span> |
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35 | 00026 <span class="preprocessor"></span> rprintf(<span class="stringliteral">"Initializing Network Device\r\n"</span>); |
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36 | 00027 <span class="preprocessor"> #endif</span> |
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37 | 00028 <span class="preprocessor"></span> <a class="code" href="group__nic.html#ga0">nicInit</a>(); |
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38 | 00029 <span class="comment">// init ARP</span> |
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39 | 00030 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span> |
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40 | 00031 <span class="preprocessor"></span> rprintf(<span class="stringliteral">"Initializing ARP cache\r\n"</span>); |
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41 | 00032 <span class="preprocessor"> #endif</span> |
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42 | 00033 <span class="preprocessor"></span> <a class="code" href="group__arp.html#ga0">arpInit</a>(); |
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43 | 00034 <span class="comment">// init addressing</span> |
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44 | 00035 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span> |
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45 | 00036 <span class="preprocessor"></span> rprintf(<span class="stringliteral">"Initializing Addressing\r\n"</span>); |
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46 | 00037 <span class="preprocessor"> #endif</span> |
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47 | 00038 <span class="preprocessor"></span> <a class="code" href="group__ip.html#ga0">ipSetConfig</a>(ipaddress, netmask, gatewayip); |
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48 | 00039 } |
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49 | 00040 |
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50 | <a name="l00041"></a><a class="code" href="group__netstack.html#ga1">00041</a> u08* <a class="code" href="group__netstack.html#ga1">netstackGetBuffer</a>(<span class="keywordtype">void</span>) |
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51 | 00042 { |
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52 | 00043 <span class="keywordflow">return</span> NetBuffer; |
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53 | 00044 } |
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54 | 00045 |
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55 | <a name="l00046"></a><a class="code" href="group__netstack.html#ga2">00046</a> <span class="keywordtype">int</span> <a class="code" href="group__netstack.html#ga2">netstackService</a>(<span class="keywordtype">void</span>) |
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56 | 00047 { |
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57 | 00048 <span class="keywordtype">int</span> len; |
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58 | 00049 <span class="keyword">struct </span>netEthHeader* ethPacket; |
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59 | 00050 |
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60 | 00051 <span class="comment">// look for a packet</span> |
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61 | 00052 len = <a class="code" href="group__nic.html#ga2">nicPoll</a>(<a class="code" href="group__netstack.html#ga6">NETSTACK_BUFFERSIZE</a>, NetBuffer); |
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62 | 00053 |
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63 | 00054 <span class="keywordflow">if</span>(len) |
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64 | 00055 { |
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65 | 00056 ethPacket = (<span class="keyword">struct </span>netEthHeader*)&NetBuffer[0]; |
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66 | 00057 |
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67 | 00058 <span class="preprocessor"> #if NET_DEBUG >= 5</span> |
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68 | 00059 <span class="preprocessor"></span> rprintf(<span class="stringliteral">"Received packet len: %d, type:"</span>, len); |
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69 | 00060 <a class="code" href="group__rprintf.html#ga8">rprintfu16</a>(<a class="code" href="group__net.html#ga2">htons</a>(ethPacket->type)); |
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70 | 00061 <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>(); |
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71 | 00062 rprintf(<span class="stringliteral">"Packet Contents\r\n"</span>); |
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72 | 00063 <a class="code" href="debug_8c.html#a0">debugPrintHexTable</a>(len, NetBuffer); |
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73 | 00064 <span class="preprocessor"> #endif</span> |
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74 | 00065 <span class="preprocessor"></span> |
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75 | 00066 <span class="keywordflow">if</span>(ethPacket->type == <a class="code" href="group__net.html#ga2">htons</a>(ETHTYPE_IP)) |
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76 | 00067 { |
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77 | 00068 <span class="comment">// process an IP packet</span> |
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78 | 00069 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span> |
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79 | 00070 <span class="preprocessor"></span> <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"NET Rx: IP packet\r\n"</span>); |
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80 | 00071 <span class="preprocessor"> #endif</span> |
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81 | 00072 <span class="preprocessor"></span> <span class="comment">// add the source to the ARP cache</span> |
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82 | 00073 <span class="comment">// also correctly set the ethernet packet length before processing?</span> |
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83 | 00074 <a class="code" href="group__arp.html#ga3">arpIpIn</a>((<span class="keyword">struct</span> netEthIpHeader*)&NetBuffer[0]); |
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84 | 00075 <span class="comment">//arpPrintTable();</span> |
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85 | 00076 |
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86 | 00077 <a class="code" href="group__netstack.html#ga3">netstackIPProcess</a>( len-ETH_HEADER_LEN, (ip_hdr*)&NetBuffer[ETH_HEADER_LEN] ); |
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87 | 00078 } |
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88 | 00079 <span class="keywordflow">else</span> <span class="keywordflow">if</span>(ethPacket->type == <a class="code" href="group__net.html#ga2">htons</a>(ETHTYPE_ARP)) |
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89 | 00080 { |
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90 | 00081 <span class="comment">// process an ARP packet</span> |
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91 | 00082 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span> |
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92 | 00083 <span class="preprocessor"></span> <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"NET Rx: ARP packet\r\n"</span>); |
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93 | 00084 <span class="preprocessor"> #endif</span> |
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94 | 00085 <span class="preprocessor"></span> <a class="code" href="group__arp.html#ga2">arpArpIn</a>(len, ((<span class="keyword">struct</span> netEthArpHeader*)&NetBuffer[0]) ); |
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95 | 00086 } |
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96 | 00087 } |
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97 | 00088 <span class="keywordflow">return</span> len; |
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98 | 00089 } |
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99 | 00090 |
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100 | <a name="l00091"></a><a class="code" href="group__netstack.html#ga3">00091</a> <span class="keywordtype">void</span> <a class="code" href="group__netstack.html#ga3">netstackIPProcess</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> len, ip_hdr* packet) |
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101 | 00092 { |
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102 | 00093 <span class="comment">// check IP addressing, stop processing if not for me and not a broadcast</span> |
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103 | 00094 <span class="keywordflow">if</span>( (<a class="code" href="group__net.html#ga3">htonl</a>(packet->destipaddr) != <a class="code" href="group__ip.html#ga1">ipGetConfig</a>()->ip) && |
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104 | 00095 (<a class="code" href="group__net.html#ga3">htonl</a>(packet->destipaddr) != (<a class="code" href="group__ip.html#ga1">ipGetConfig</a>()->ip|<a class="code" href="group__ip.html#ga1">ipGetConfig</a>()->netmask)) && |
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105 | 00096 (<a class="code" href="group__net.html#ga3">htonl</a>(packet->destipaddr) != 0xFFFFFFFF) ) |
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106 | 00097 <span class="keywordflow">return</span>; |
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107 | 00098 |
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108 | 00099 <span class="comment">// handle ICMP packet</span> |
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109 | 00100 <span class="keywordflow">if</span>( packet->proto == IP_PROTO_ICMP ) |
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110 | 00101 { |
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111 | 00102 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span> |
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112 | 00103 <span class="preprocessor"></span> <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"NET Rx: ICMP/IP packet\r\n"</span>); |
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113 | 00104 <span class="comment">//icmpPrintHeader((icmpip_hdr*)packet);</span> |
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114 | 00105 <span class="preprocessor"> #endif</span> |
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115 | 00106 <span class="preprocessor"></span> <a class="code" href="group__icmp.html#ga1">icmpIpIn</a>((icmpip_hdr*)packet); |
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116 | 00107 } |
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117 | 00108 <span class="keywordflow">else</span> <span class="keywordflow">if</span>( packet->proto == IP_PROTO_UDP ) |
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118 | 00109 { |
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119 | 00110 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span> |
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120 | 00111 <span class="preprocessor"></span> <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"NET Rx: UDP/IP packet\r\n"</span>); |
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121 | 00112 <span class="comment">//debugPrintHexTable(NetBufferLen-14, &NetBuffer[14]);</span> |
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122 | 00113 <span class="preprocessor"> #endif</span> |
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123 | 00114 <span class="preprocessor"></span> <a class="code" href="group__netstack.html#ga4">netstackUDPIPProcess</a>(len, ((udpip_hdr*)packet) ); |
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124 | 00115 } |
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125 | 00116 <span class="keywordflow">else</span> <span class="keywordflow">if</span>( packet->proto == IP_PROTO_TCP ) |
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126 | 00117 { |
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127 | 00118 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span> |
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128 | 00119 <span class="preprocessor"></span> <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"NET Rx: TCP/IP packet\r\n"</span>); |
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129 | 00120 <span class="preprocessor"> #endif</span> |
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130 | 00121 <span class="preprocessor"></span> <a class="code" href="group__netstack.html#ga5">netstackTCPIPProcess</a>(len, ((tcpip_hdr*)packet) ); |
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131 | 00122 } |
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132 | 00123 <span class="keywordflow">else</span> |
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133 | 00124 { |
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134 | 00125 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span> |
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135 | 00126 <span class="preprocessor"></span> <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"NET Rx: IP packet\r\n"</span>); |
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136 | 00127 <span class="preprocessor"> #endif</span> |
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137 | 00128 <span class="preprocessor"></span> } |
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138 | 00129 } |
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139 | 00130 |
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140 | <a name="l00131"></a><a class="code" href="group__netstack.html#ga4">00131</a> <span class="keywordtype">void</span> <a class="code" href="group__netstack.html#ga4">netstackUDPIPProcess</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> len, udpip_hdr* packet) |
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141 | 00132 { |
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142 | 00133 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span> |
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143 | 00134 <span class="preprocessor"></span> rprintf(<span class="stringliteral">"NetStack UDP/IP Rx Dummy Handler\r\n"</span>); |
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144 | 00135 <span class="preprocessor"> #endif</span> |
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145 | 00136 <span class="preprocessor"></span>} |
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146 | 00137 |
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147 | <a name="l00138"></a><a class="code" href="group__netstack.html#ga5">00138</a> <span class="keywordtype">void</span> <a class="code" href="group__netstack.html#ga5">netstackTCPIPProcess</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> len, tcpip_hdr* packet) |
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148 | 00139 { |
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149 | 00140 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span> |
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150 | 00141 <span class="preprocessor"></span> rprintf(<span class="stringliteral">"NetStack TCP/IP Rx Dummy Handler\r\n"</span>); |
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151 | 00142 <span class="preprocessor"> #endif</span> |
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152 | 00143 <span class="preprocessor"></span>} |
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153 | </pre></div><hr size="1"><address style="align: right;"><small>Generated on Sun Oct 29 03:41:07 2006 for Procyon AVRlib by |
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154 | <a href="http://www.doxygen.org/index.html"> |
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155 | <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.2 </small></address> |
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156 | </body> |
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