Mercurial > flash_v2

annotate packages/redboot/current/src/net/enet.c @ 132:0ae0bc38e387 ecos-sw-2000-10-31

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Merge from eCos master repository on 2000-10-31-00:30:36-GMT
author jlarmour
date Tue, 31 Oct 2000 20:53:09 +0000
parents eb9fd8c04db3
children 25e238959bae
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1 //==========================================================================
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2 //
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3 // net/enet.c
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4 //
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5 // Stand-alone ethernet [link-layer] support for RedBoot
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6 //
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7 //==========================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //==========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): gthomas
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35 // Contributors: gthomas
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36 // Date: 2000-07-14
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37 // Purpose:
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38 // Description:
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39 //
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40 // This code is part of RedBoot (tm).
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41 //
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42 //####DESCRIPTIONEND####
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43 //
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44 //==========================================================================
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45
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46 #include <redboot.h>
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47 #include <net/net.h>
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48 #include <eth_drv.h> // Logical driver interfaces
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49
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50 #define ENET_STATS 1
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51
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52 #ifdef ENET_STATS
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53 static int num_ip = 0;
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54 static int num_arp = 0;
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55 #ifdef NET_SUPPORT_RARP
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56 static int num_rarp = 0;
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57 #endif
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58 static int num_received = 0;
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59 static int num_transmitted = 0;
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60 #endif
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61
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62 /*
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63 * Non-blocking poll of ethernet link. Process packets until no more
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64 * are available.
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65 */
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66 void
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67 __enet_poll(void)
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68 {
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69 pktbuf_t *pkt;
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70 eth_header_t eth_hdr;
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71
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72 while (true) {
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73 /*
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74 * Try to get a free pktbuf and return if none
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75 * are available.
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76 */
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77 if ((pkt = __pktbuf_alloc(ETH_MAX_PKTLEN)) == NULL) {
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78 printf("__enet_poll: no more buffers\n");
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79 __pktbuf_dump();
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80 while (1) ;
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81 return;
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82 }
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83
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84 if ((pkt->pkt_bytes = eth_drv_read((char *)&eth_hdr, (char *)pkt->buf,
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85 ETH_MAX_PKTLEN)) > 0) {
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86 #if ENET_STATS
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87 ++num_received;
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88 #endif
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89 switch (ntohs(eth_hdr.type)) {
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90
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91 case ETH_TYPE_IP:
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92 #if ENET_STATS
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93 ++num_ip;
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94 #endif
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95 pkt->ip_hdr = (ip_header_t *)pkt->buf;
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96 __ip_handler(pkt, &eth_hdr.source);
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97 break;
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98
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99 case ETH_TYPE_ARP:
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100 #if ENET_STATS
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101 ++num_arp;
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102 #endif
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103 pkt->arp_hdr = (arp_header_t *)pkt->buf;
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104 __arp_handler(pkt);
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105 break;
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106
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107 #ifdef NET_SUPPORT_RARP
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108 case ETH_TYPE_RARP:
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109 #if ENET_STATS
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110 ++num_rarp;
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111 #endif
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112 pkt->arp_hdr = (arp_header_t *)pkt->buf;
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113 __rarp_handler(pkt);
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114 break;
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115 #endif
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116
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117 default:
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118 __pktbuf_free(pkt);
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119 break;
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120 }
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121 } else {
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122 __pktbuf_free(pkt);
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123 break;
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124 }
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125 }
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126 }
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127
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128
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129
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130 /*
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131 * Send an ethernet packet.
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132 */
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133 void
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134 __enet_send(pktbuf_t *pkt, enet_addr_t *dest, int eth_type)
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135 {
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136 eth_header_t eth_hdr;
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137
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138 // Set up ethernet header
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139 memcpy(&eth_hdr.destination, dest, sizeof(enet_addr_t));
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140 memcpy(&eth_hdr.source, __local_enet_addr, sizeof(enet_addr_t));
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141 eth_hdr.type = htons(eth_type);
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142
132
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143 eth_drv_write((char *)&eth_hdr, (char *)pkt->buf, pkt->pkt_bytes);
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144 #if ENET_STATS
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145 ++num_transmitted;
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146 #endif
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147 }
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148
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149
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150 #ifdef __LITTLE_ENDIAN__
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151
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152 unsigned long
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153 ntohl(unsigned long x)
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154 {
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155 return (((x & 0x000000FF) << 24) |
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156 ((x & 0x0000FF00) << 8) |
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157 ((x & 0x00FF0000) >> 8) |
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158 ((x & 0xFF000000) >> 24));
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159 }
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160
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161 unsigned long
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162 ntohs(unsigned short x)
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163 {
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164 return (((x & 0x00FF) << 8) |
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165 ((x & 0xFF00) >> 8));
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166 }
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167
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168 #endif