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annotate packages/redboot/current/include/net/net.h @ 149:52c99470ec11

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Merge from eCos master repository on 2001-01-19-06:43:03-GMT
author jlarmour
date Fri, 19 Jan 2001 07:37:45 +0000
parents 6b5f480c6929
children f0e3fb000de8
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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, 2001 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 union {
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264 ip_header_t *__iphdr; /* pointer to IP header */
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265 arp_header_t *__arphdr; /* pointer to ARP header */
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266 } u1;
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267 #define ip_hdr u1.__iphdr
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268 #define arp_hdr u1.__arphdr
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269 union {
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270 udp_header_t *__udphdr; /* pointer to UDP header */
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271 tcp_header_t *__tcphdr; /* pointer to TCP header */
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272 icmp_header_t *__icmphdr; /* pointer to ICMP header */
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273 } u2;
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274 #define udp_hdr u2.__udphdr
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275 #define tcp_hdr u2.__tcphdr
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276 #define icmp_hdr u2.__icmphdr
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277 word pkt_bytes; /* number of data bytes in buf */
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278 word bufsize; /* size of buf */
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279 word *buf;
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280 } pktbuf_t;
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281
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282
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283 /* protocol handler */
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284 typedef void (*pkt_handler_t)(pktbuf_t *pkt);
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285
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286
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287 typedef struct _udp_socket {
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288 struct _udp_socket *next;
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289 word our_port;
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290 word pad;
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291 void (*handler)(struct _udp_socket *skt, char *buf, int len,
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292 ip_route_t *src_route, word src_port);
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293 } udp_socket_t;
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294
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295
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296 typedef void (*udp_handler_t)(udp_socket_t *skt, char *buf, int len,
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297 ip_route_t *src_route, word src_port);
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298
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299
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300 typedef struct _tcp_socket {
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301 struct _tcp_socket *next;
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302 int state; /* connection state */
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303 #define _CLOSED 0
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304 #define _LISTEN 1
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305 #define _SYN_RCVD 2
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306 #define _SYN_SENT 3
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307 #define _ESTABLISHED 4
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308 #define _CLOSE_WAIT 5
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309 #define _LAST_ACK 6
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310 #define _FIN_WAIT_1 7
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311 #define _FIN_WAIT_2 8
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312 #define _CLOSING 9
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313 #define _TIME_WAIT 10
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314 ip_route_t his_addr; /* address of other end of connection */
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315 word our_port;
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316 word his_port;
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317 word data_bytes; /* number of data bytes in pkt */
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318 timer_t timer;
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319 pktbuf_t pkt; /* dedicated xmit packet */
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320 pktbuf_t *rxlist; /* list of unread incoming data packets */
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321 char *rxptr; /* pointer to next byte to read */
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322 int rxcnt; /* bytes left in current read packet */
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323 word ack_pending; /* true if outgoing ack is deferred while
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324 awaiting incoming ack */
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325 dword ack;
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326 dword seq;
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327 char pktbuf[ETH_MAX_PKTLEN];
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328 } tcp_socket_t;
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329
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330 /*
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331 * Our address.
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332 */
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333 extern enet_addr_t __local_enet_addr;
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334 extern ip_addr_t __local_ip_addr;
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335
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336
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337 /*
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338 * Set a timer. Caller is responsible for providing the timer_t struct.
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339 */
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340 extern void __timer_set(timer_t *t, unsigned long delay,
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341 tmr_handler_t handler, void *user_data);
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342
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343 /*
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344 * Cancel the given timer.
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345 */
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346 extern void __timer_cancel(timer_t *t);
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347
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348 /*
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349 * Poll timer list for timer expirations.
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350 */
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351 extern void __timer_poll(void);
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352
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353 /*
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354 * Initialize the free list.
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355 */
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356 extern void __pktbuf_init(void);
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357
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358 /*
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359 * simple pktbuf allocation.
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360 * allocates at least nbytes for packet data including ethernet header.
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361 */
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362 extern pktbuf_t *__pktbuf_alloc(int nbytes);
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363
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364 /*
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365 * return a pktbuf for reuse.
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366 */
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367 extern void __pktbuf_free(pktbuf_t *pkt);
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368
132
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369 /*
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370 * Dump packet structures (debug, in case of running out)
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371 */
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372 extern void __pktbuf_dump(void);
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373
115
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374
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375 /*
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376 * Install handlers for ethernet packets.
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377 * Returns old handler.
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378 */
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379 extern pkt_handler_t __eth_install_handler(int eth_type,
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380 pkt_handler_t handler);
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381 /*
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382 * Set tcp port number for debugging. If not called, a default
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383 * will be selected.
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384 */
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385 extern void _bsp_net_set_debug_port(int portnum);
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386
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387 /*
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388 * Non-blocking poll of ethernet link. Processes at most
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389 * one packet.
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390 */
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391 extern void __enet_poll(void);
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392
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393 /*
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394 * Send an ethernet packet.
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395 */
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396 extern void __enet_send(pktbuf_t *pkt, enet_addr_t *dest, int eth_type);
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397
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398
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399 /*
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400 * Handle incoming ARP packets.
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401 */
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402 extern void __arp_handler(pktbuf_t *pkt);
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403
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404 /*
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405 * Find the ethernet address of the machine with the given
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406 * ip address.
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407 * Return true and fills in 'eth_addr' if successful, false
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408 * if unsuccessful.
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409 */
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410 extern int __arp_request(ip_addr_t *ip_addr, enet_addr_t *eth_addr);
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411
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412 /*
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413 * Lookup an address from the local ARP cache. If not found,
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414 * then call 'arp_request' to find it. [Basically just a cached
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415 * version of 'arp_request']
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416 */
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417 extern int __arp_lookup(ip_addr_t *host, ip_route_t *rt);
115
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418
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419 /*
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420 * Do a one's complement checksum.
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421 * The data being checksum'd is in network byte order.
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422 * The returned checksum is in network byte order.
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423 */
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424 extern unsigned short __sum(word *w, int len, int init_sum);
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425
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426 /*
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427 * Compute a partial checksum for the UDP/TCP pseudo header.
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428 */
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429 extern int __pseudo_sum(ip_header_t *ip);
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430
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431 /*
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432 * Handle IP packets coming from the polled ethernet interface.
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433 */
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434 extern void __ip_handler(pktbuf_t *pkt, enet_addr_t *src_enet_addr);
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435
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436 /*
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437 * Send an IP packet.
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438 *
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439 * The IP data field should contain pkt->pkt_bytes of data.
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440 * pkt->[udp|tcp|icmp]_hdr points to the IP data field. Any
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441 * IP options are assumed to be already in place in the IP
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442 * options field.
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443 */
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444 extern void __ip_send(pktbuf_t *pkt, int protocol, ip_route_t *dest);
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445
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446
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447 /*
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448 * Handle incoming ICMP packets.
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449 */
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450 extern void __icmp_handler(pktbuf_t *pkt, ip_route_t *r);
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451
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452 /*
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453 * Handle incoming UDP packets.
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454 */
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455 extern void __udp_handler(pktbuf_t *pkt, ip_route_t *r);
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456
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457 /*
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diff changeset
458 * Install a handler for incoming udp packets.
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459 * Caller provides the udp_socket_t structure.
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460 * Returns zero if successful, -1 if socket is already used.
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461 */
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462 extern int __udp_install_listener(udp_socket_t *s, word port,
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463 udp_handler_t handler);
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464
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465 /*
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466 * Remove the handler for the given socket.
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467 */
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468 extern void __udp_remove_listener(word port);
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469
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470 /*
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471 * Send a UDP packet.
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472 */
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473 extern void __udp_send(char *buf, int len, ip_route_t *dest_ip,
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474 word dest_port, word src_port);
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475
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476 // Send a UDP packet
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477 extern int __udp_sendto(char *buf, int len,
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478 struct sockaddr_in *server, struct sockaddr_in *local);
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479
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480 // Receive a UDP packet
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481 extern int __udp_recvfrom(char *buf, int len,
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482 struct sockaddr_in *from, struct sockaddr_in *local,
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483 struct timeval *timeout);
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484
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485 /*
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486 * TCP poll function. Should be called as often as possible.
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487 */
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488 extern void __tcp_poll(void);
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489
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490 /*
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491 * Set up a listening socket on the given port.
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492 * Does not block.
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493 */
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494 extern int __tcp_listen(tcp_socket_t *s, word port);
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495
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496
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497 /*
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498 * Block while waiting for all outstanding socket data to
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499 * be transmitted.
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500 */
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501 extern void __tcp_drain(tcp_socket_t *s);
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502
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503
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504 /*
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505 * Initiate connection close.
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506 */
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507 extern void __tcp_close(tcp_socket_t *s);
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508
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509 /*
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510 * Wait until connection has fully closed.
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511 */
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512 extern void __tcp_close_wait(tcp_socket_t *s);
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513
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514 /*
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515 * Read up to 'len' bytes without blocking.
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516 * Returns number of bytes read.
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517 * If connection is closed, returns -1.
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518 */
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519 extern int __tcp_read(tcp_socket_t *s, char *buf, int len);
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520
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521 /*
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522 * Write up to 'len' bytes without blocking.
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523 * Returns number of bytes written.
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524 * If connection is closed, returns -1.
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525 */
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526 extern int __tcp_write(tcp_socket_t *s, char *buf, int len);
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527
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528
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529 /*
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530 * The following are a higher-level tcp socket interface.
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531 */
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532
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diff changeset
533 /*
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diff changeset
534 * Initialize a socket for given port.
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535 */
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536 extern void __skt_init(tcp_socket_t *s, unsigned short port);
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537
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538 /*
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539 * Return true if socket connection is closed.
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540 */
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541 #define __skt_is_closed(s) (((tcp_socket_t *)(s))->state == _CLOSED)
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542
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543 /*
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diff changeset
544 * Block while listening for an incoming connection.
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545 */
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546 extern void __skt_wait_for_connect(tcp_socket_t *s);
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547
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diff changeset
548 /*
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diff changeset
549 * Read up to 'len' bytes from the given socket.
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diff changeset
550 * Returns number of bytes read.
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551 * Doesn't block.
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552 */
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553 extern int __skt_read(tcp_socket_t *s, char *buf, int len);
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554
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555 /*
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diff changeset
556 * Write 'len' bytes to the given socket.
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557 * Returns number of bytes written.
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558 * May not write all data if connection closes.
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559 */
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560 extern int __skt_write(tcp_socket_t *s, char *buf, int len);
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561
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562 // Initialize the network stack - logical driver layer, etc.
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563 extern void net_init(void);
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564
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565 // Test for new network I/O connections
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566 extern void net_io_test(void);
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567
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568 // Conversion between IP addresses and printable strings
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569 extern bool inet_aton(char *, in_addr_t *);
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570 extern char *inet_ntoa(in_addr_t *);
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571
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572 // FIXME
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573 /* #define NET_SUPPORT_RARP 1 */
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574 #define NET_SUPPORT_ICMP 1
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575 #define NET_SUPPORT_UDP 1
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576 #define NET_SUPPORT_TCP 1
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577
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578 #ifdef BSP_LOG
143
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579 #define BSPLOG(x) { int old_console = start_console(); x; end_console(old_console); }
115
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580 #define bsp_log printf
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581 #else
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582 #define BSPLOG(x)
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583 #endif
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584
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585 #endif // _NET_H_