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annotate packages/redboot/current/include/net/net.h @ 143:6b5f480c6929 ecos-sw-2000-12-08

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Merge from eCos master repository on 2000-12-08-02:09:36-GMT
author jlarmour
date Fri, 08 Dec 2000 03:30:06 +0000
parents 0ae0bc38e387
children 52c99470ec11
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1 //==========================================================================
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2 //
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3 // net/net.h
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4 //
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5 // Stand-alone networking 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 #ifndef _NET_H_
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47 #define _NET_H_
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48
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49 #include <pkgconf/redboot.h>
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50 #include <cyg/hal/hal_arch.h>
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51 #include <cyg/hal/basetype.h>
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52
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53 extern bool net_debug;
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54
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55 extern unsigned long do_ms_tick(void);
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56 #define MS_TICKS() do_ms_tick()
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57
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58 /* #define NET_SUPPORT_RARP 1 */
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59 #define NET_SUPPORT_ICMP 1
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60 #define NET_SUPPORT_UDP 1
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61 #define NET_SUPPORT_TCP 1
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62
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63 #if (CYG_BYTEORDER == CYG_LSBFIRST)
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64 #ifndef __LITTLE_ENDIAN__
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65 #define __LITTLE_ENDIAN__
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66 #endif
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67 extern unsigned long ntohl(unsigned long x);
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68 extern unsigned long ntohs(unsigned short x);
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69 #else
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70 #define ntohl(x) (x)
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71 #define ntohs(x) (x)
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72 #endif
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73
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74 #define htonl(x) ntohl(x)
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75 #define htons(x) ntohs(x)
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76
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77 /*
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78 * Minimum ethernet packet length.
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79 */
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80 #define ETH_MIN_PKTLEN 60
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81 #define ETH_MAX_PKTLEN 1514
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82
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83 typedef unsigned char enet_addr_t[6];
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84 typedef unsigned char ip_addr_t[4];
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85
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86 typedef unsigned char octet;
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87 typedef unsigned short word;
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88 typedef unsigned int dword;
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89
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90 #ifndef NULL
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91 #define NULL 0
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92 #endif
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93
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94 // IPv4 support
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95 typedef struct in_addr {
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96 unsigned long s_addr; // IPv4 address
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97 } in_addr_t;
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98
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99 // Socket/connection information
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100 struct sockaddr_in {
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101 struct in_addr sin_addr;
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102 unsigned short sin_port;
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103 unsigned short sin_family;
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104 short sin_len;
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105 };
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106 #define AF_INET 1
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107 #define INADDR_ANY 0
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108
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109 struct timeval {
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110 unsigned long tv_sec;
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111 unsigned long tv_usec;
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112 };
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113
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114 /*
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115 * Simple timer support structure.
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116 */
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117 typedef void (*tmr_handler_t)(void *user_data);
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118
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119 /*
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120 * Timer structure.
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121 * When expiration time is met or exceeded, the handler is
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122 * called and the timer struct is removed from the list.
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123 */
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124 typedef struct _timer {
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125 struct _timer *next; /* next timer in list */
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126 unsigned long delay; /* expiration time relative to start time */
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127 unsigned long start; /* when the timer was set */
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128 tmr_handler_t handler; /* user procedure to call when timer 'fires' */
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129 void *user_data; /* user pointer passed to above procedure */
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130 } timer_t;
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131
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132
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133 /*
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134 * Ethernet header.
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135 */
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136 typedef struct {
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137 enet_addr_t destination;
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138 enet_addr_t source;
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139 word type;
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140 #define ETH_TYPE_IP 0x800
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141 #define ETH_TYPE_ARP 0x806
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142 #define ETH_TYPE_RARP 0x8053
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143 } eth_header_t;
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144
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145
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146 /*
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147 * ARP/RARP header.
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148 */
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149 typedef struct {
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150 word hw_type;
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151 #define ARP_HW_ETHER 1
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152 #define ARP_HW_EXP_ETHER 2
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153 word protocol;
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154 octet hw_len;
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155 octet proto_len;
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156 word opcode;
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157 #define ARP_REQUEST 1
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158 #define ARP_REPLY 2
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159 #define RARP_REQUEST 3
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160 #define RARP_REPLY 4
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161 enet_addr_t sender_enet;
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162 ip_addr_t sender_ip;
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163 enet_addr_t target_enet;
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164 ip_addr_t target_ip;
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165 } arp_header_t;
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166
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167
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168 #define ARP_PKT_SIZE (sizeof(arp_header_t) + sizeof(eth_header_t))
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169
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170 /*
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171 * Internet Protocol header.
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172 */
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173 typedef struct {
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174 #ifdef __LITTLE_ENDIAN__
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175 octet hdr_len:4,
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176 version:4;
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177 #else
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178 octet version:4,
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179 hdr_len:4;
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180 #endif
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181 octet tos;
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182 word length;
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183 word ident;
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184 word fragment;
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185 octet ttl;
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186 octet protocol;
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187 #define IP_PROTO_ICMP 1
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188 #define IP_PROTO_TCP 6
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189 #define IP_PROTO_UDP 17
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190 word checksum;
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191 ip_addr_t source;
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192 ip_addr_t destination;
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193 } ip_header_t;
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194
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195
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196 #define IP_PKT_SIZE (60 + sizeof(eth_header_t))
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197
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198
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199 /*
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200 * A IP<->ethernet address mapping.
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201 */
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202 typedef struct {
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203 ip_addr_t ip_addr;
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204 enet_addr_t enet_addr;
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205 } ip_route_t;
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206
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207
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208 /*
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209 * UDP header.
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210 */
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211 typedef struct {
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212 word src_port;
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213 word dest_port;
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214 word length;
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215 word checksum;
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216 } udp_header_t;
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217
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218
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219 /*
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220 * TCP header.
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221 */
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222 typedef struct {
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223 word src_port;
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224 word dest_port;
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225 dword seqnum;
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226 dword acknum;
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227 #ifdef __LITTLE_ENDIAN__
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228 octet reserved:4,
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229 hdr_len:4;
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230 #else
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231 octet hdr_len:4,
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232 reserved:4;
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233 #endif
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234 octet flags;
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235 #define TCP_FLAG_FIN 1
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236 #define TCP_FLAG_SYN 2
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237 #define TCP_FLAG_RST 4
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238 #define TCP_FLAG_PSH 8
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239 #define TCP_FLAG_ACK 16
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240 #define TCP_FLAG_URG 32
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241 word window;
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242 word checksum;
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243 word urgent;
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244 } tcp_header_t;
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245
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246
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247 /*
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248 * ICMP header.
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249 */
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250 typedef struct {
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251 octet type;
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252 #define ICMP_TYPE_ECHOREPLY 0
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253 #define ICMP_TYPE_ECHOREQUEST 8
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254 octet code;
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255 word checksum;
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256 word ident;
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257 word seqnum;
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258 } icmp_header_t;
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259
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260
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261 typedef struct _pktbuf {
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262 struct _pktbuf *next;
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263 #if 0
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264 eth_header_t *eth_hdr; /* pointer to ethernet header */
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265 #endif
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266 union {
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267 ip_header_t *__iphdr; /* pointer to IP header */
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268 arp_header_t *__arphdr; /* pointer to ARP header */
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269 } u1;
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270 #define ip_hdr u1.__iphdr
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271 #define arp_hdr u1.__arphdr
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272 union {
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273 udp_header_t *__udphdr; /* pointer to UDP header */
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274 tcp_header_t *__tcphdr; /* pointer to TCP header */
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275 icmp_header_t *__icmphdr; /* pointer to ICMP header */
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276 } u2;
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277 #define udp_hdr u2.__udphdr
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278 #define tcp_hdr u2.__tcphdr
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279 #define icmp_hdr u2.__icmphdr
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280 word pkt_bytes; /* number of data bytes in buf */
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281 word bufsize; /* size of buf */
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282 word *buf;
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283 } pktbuf_t;
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284
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285
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286 /* protocol handler */
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287 typedef void (*pkt_handler_t)(pktbuf_t *pkt);
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288
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289
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290 typedef struct _udp_socket {
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291 struct _udp_socket *next;
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292 word our_port;
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293 word pad;
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294 void (*handler)(struct _udp_socket *skt, char *buf, int len,
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295 ip_route_t *src_route, word src_port);
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296 } udp_socket_t;
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297
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298
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299 typedef void (*udp_handler_t)(udp_socket_t *skt, char *buf, int len,
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300 ip_route_t *src_route, word src_port);
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301
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302
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303 typedef struct _tcp_socket {
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304 struct _tcp_socket *next;
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305 int state; /* connection state */
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306 #define _CLOSED 0
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307 #define _LISTEN 1
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308 #define _SYN_RCVD 2
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309 #define _SYN_SENT 3
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310 #define _ESTABLISHED 4
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311 #define _CLOSE_WAIT 5
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312 #define _LAST_ACK 6
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313 #define _FIN_WAIT_1 7
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314 #define _FIN_WAIT_2 8
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315 #define _CLOSING 9
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316 #define _TIME_WAIT 10
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317 ip_route_t his_addr; /* address of other end of connection */
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318 word our_port;
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319 word his_port;
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320 word data_bytes; /* number of data bytes in pkt */
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321 timer_t timer;
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322 pktbuf_t pkt; /* dedicated xmit packet */
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323 pktbuf_t *rxlist; /* list of unread incoming data packets */
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324 char *rxptr; /* pointer to next byte to read */
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325 int rxcnt; /* bytes left in current read packet */
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326 word ack_pending; /* true if outgoing ack is deferred while
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327 awaiting incoming ack */
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328 dword ack;
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329 dword seq;
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330 char pktbuf[ETH_MAX_PKTLEN];
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331 } tcp_socket_t;
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332
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333 /*
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334 * Our address.
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335 */
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336 extern enet_addr_t __local_enet_addr;
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337 extern ip_addr_t __local_ip_addr;
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338
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339
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340 /*
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341 * Set a timer. Caller is responsible for providing the timer_t struct.
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342 */
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343 extern void __timer_set(timer_t *t, unsigned long delay,
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344 tmr_handler_t handler, void *user_data);
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345
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346 /*
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347 * Cancel the given timer.
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348 */
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349 extern void __timer_cancel(timer_t *t);
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350
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351 /*
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352 * Poll timer list for timer expirations.
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353 */
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354 extern void __timer_poll(void);
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355
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356 /*
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357 * Initialize the free list.
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358 */
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359 extern void __pktbuf_init(void);
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360
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361 /*
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362 * simple pktbuf allocation.
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363 * allocates at least nbytes for packet data including ethernet header.
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364 */
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365 extern pktbuf_t *__pktbuf_alloc(int nbytes);
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366
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367 /*
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368 * return a pktbuf for reuse.
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369 */
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370 extern void __pktbuf_free(pktbuf_t *pkt);
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371
132
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372 /*
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373 * Dump packet structures (debug, in case of running out)
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374 */
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375 extern void __pktbuf_dump(void);
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376
115
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377
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378 /*
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379 * Install handlers for ethernet packets.
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380 * Returns old handler.
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381 */
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382 extern pkt_handler_t __eth_install_handler(int eth_type,
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383 pkt_handler_t handler);
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384 /*
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385 * Set tcp port number for debugging. If not called, a default
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386 * will be selected.
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387 */
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388 extern void _bsp_net_set_debug_port(int portnum);
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389
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390 /*
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391 * Non-blocking poll of ethernet link. Processes at most
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392 * one packet.
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393 */
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394 extern void __enet_poll(void);
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395
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396 /*
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397 * Send an ethernet packet.
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398 */
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399 extern void __enet_send(pktbuf_t *pkt, enet_addr_t *dest, int eth_type);
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400
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401
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402 /*
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403 * Handle incoming ARP packets.
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404 */
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405 extern void __arp_handler(pktbuf_t *pkt);
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406
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407 /*
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408 * Find the ethernet address of the machine with the given
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409 * ip address.
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410 * Return true and fills in 'eth_addr' if successful, false
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411 * if unsuccessful.
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412 */
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413 extern int __arp_request(ip_addr_t *ip_addr, enet_addr_t *eth_addr);
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414
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415 /*
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416 * Lookup an address from the local ARP cache. If not found,
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417 * then call 'arp_request' to find it. [Basically just a cached
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418 * version of 'arp_request']
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419 */
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420 extern int __arp_lookup(ip_addr_t *host, ip_route_t *rt);
115
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421
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422 /*
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423 * Do a one's complement checksum.
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424 * The data being checksum'd is in network byte order.
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425 * The returned checksum is in network byte order.
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426 */
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427 extern unsigned short __sum(word *w, int len, int init_sum);
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428
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429 /*
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430 * Compute a partial checksum for the UDP/TCP pseudo header.
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431 */
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432 extern int __pseudo_sum(ip_header_t *ip);
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433
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434 /*
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435 * Handle IP packets coming from the polled ethernet interface.
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436 */
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437 extern void __ip_handler(pktbuf_t *pkt, enet_addr_t *src_enet_addr);
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438
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439 /*
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440 * Send an IP packet.
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441 *
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442 * The IP data field should contain pkt->pkt_bytes of data.
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443 * pkt->[udp|tcp|icmp]_hdr points to the IP data field. Any
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444 * IP options are assumed to be already in place in the IP
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diff changeset
445 * options field.
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446 */
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447 extern void __ip_send(pktbuf_t *pkt, int protocol, ip_route_t *dest);
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448
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449
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450 /*
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451 * Handle incoming ICMP packets.
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452 */
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453 extern void __icmp_handler(pktbuf_t *pkt, ip_route_t *r);
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454
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455 /*
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456 * Handle incoming UDP packets.
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457 */
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458 extern void __udp_handler(pktbuf_t *pkt, ip_route_t *r);
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459
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460 /*
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diff changeset
461 * Install a handler for incoming udp packets.
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462 * Caller provides the udp_socket_t structure.
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463 * Returns zero if successful, -1 if socket is already used.
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464 */
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465 extern int __udp_install_listener(udp_socket_t *s, word port,
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466 udp_handler_t handler);
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467
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468 /*
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diff changeset
469 * Remove the handler for the given socket.
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470 */
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471 extern void __udp_remove_listener(word port);
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472
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473 /*
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474 * Send a UDP packet.
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475 */
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476 extern void __udp_send(char *buf, int len, ip_route_t *dest_ip,
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477 word dest_port, word src_port);
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478
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479 // Send a UDP packet
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480 extern int __udp_sendto(char *buf, int len,
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481 struct sockaddr_in *server, struct sockaddr_in *local);
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482
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483 // Receive a UDP packet
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484 extern int __udp_recvfrom(char *buf, int len,
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485 struct sockaddr_in *from, struct sockaddr_in *local,
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486 struct timeval *timeout);
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487
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488 /*
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489 * TCP poll function. Should be called as often as possible.
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490 */
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491 extern void __tcp_poll(void);
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492
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493 /*
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494 * Set up a listening socket on the given port.
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495 * Does not block.
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496 */
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497 extern int __tcp_listen(tcp_socket_t *s, word port);
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498
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499
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500 /*
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501 * Block while waiting for all outstanding socket data to
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502 * be transmitted.
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503 */
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504 extern void __tcp_drain(tcp_socket_t *s);
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505
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506
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507 /*
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508 * Initiate connection close.
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509 */
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510 extern void __tcp_close(tcp_socket_t *s);
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511
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512 /*
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diff changeset
513 * Wait until connection has fully closed.
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514 */
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515 extern void __tcp_close_wait(tcp_socket_t *s);
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516
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517 /*
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518 * Read up to 'len' bytes without blocking.
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519 * Returns number of bytes read.
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520 * If connection is closed, returns -1.
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521 */
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522 extern int __tcp_read(tcp_socket_t *s, char *buf, int len);
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523
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diff changeset
524 /*
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diff changeset
525 * Write up to 'len' bytes without blocking.
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diff changeset
526 * Returns number of bytes written.
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diff changeset
527 * If connection is closed, returns -1.
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528 */
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529 extern int __tcp_write(tcp_socket_t *s, char *buf, int len);
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530
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531
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diff changeset
532 /*
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diff changeset
533 * The following are a higher-level tcp socket interface.
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534 */
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535
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diff changeset
536 /*
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diff changeset
537 * Initialize a socket for given port.
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538 */
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539 extern void __skt_init(tcp_socket_t *s, unsigned short port);
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diff changeset
540
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diff changeset
541 /*
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diff changeset
542 * Return true if socket connection is closed.
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diff changeset
543 */
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544 #define __skt_is_closed(s) (((tcp_socket_t *)(s))->state == _CLOSED)
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545
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diff changeset
546 /*
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diff changeset
547 * Block while listening for an incoming connection.
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548 */
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549 extern void __skt_wait_for_connect(tcp_socket_t *s);
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diff changeset
550
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diff changeset
551 /*
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diff changeset
552 * Read up to 'len' bytes from the given socket.
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diff changeset
553 * Returns number of bytes read.
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diff changeset
554 * Doesn't block.
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555 */
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556 extern int __skt_read(tcp_socket_t *s, char *buf, int len);
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557
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diff changeset
558 /*
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diff changeset
559 * Write 'len' bytes to the given socket.
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diff changeset
560 * Returns number of bytes written.
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diff changeset
561 * May not write all data if connection closes.
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562 */
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563 extern int __skt_write(tcp_socket_t *s, char *buf, int len);
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564
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diff changeset
565 // Initialize the network stack - logical driver layer, etc.
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566 extern void net_init(void);
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567
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diff changeset
568 // Test for new network I/O connections
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569 extern void net_io_test(void);
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570
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diff changeset
571 // Conversion between IP addresses and printable strings
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572 extern bool inet_aton(char *, in_addr_t *);
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diff changeset
573 extern char *inet_ntoa(in_addr_t *);
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574
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diff changeset
575 // FIXME
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diff changeset
576 /* #define NET_SUPPORT_RARP 1 */
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diff changeset
577 #define NET_SUPPORT_ICMP 1
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578 #define NET_SUPPORT_UDP 1
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579 #define NET_SUPPORT_TCP 1
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580
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581 #ifdef BSP_LOG
143
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diff changeset
582 #define BSPLOG(x) { int old_console = start_console(); x; end_console(old_console); }
115
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583 #define bsp_log printf
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584 #else
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585 #define BSPLOG(x)
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586 #endif
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587
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588 #endif // _NET_H_