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annotate packages/redboot/current/include/net/net.h @ 208:e0c0827131d1 ecos

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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
parents ea3f0bd33a73
children d2c90368aeef
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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 //####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later version.
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16 //
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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20 // for more details.
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21 //
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22 // You should have received a copy of the GNU General Public License along
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23 // with eCos; if not, write to the Free Software Foundation, Inc.,
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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25 //
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26 // As a special exception, if other files instantiate templates or use macros
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27 // or inline functions from this file, or you compile this file and link it
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28 // with other works to produce a work based on this file, this file does not
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29 // by itself cause the resulting work to be covered by the GNU General Public
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30 // License. However the source code for this file must still be made available
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31 // in accordance with section (3) of the GNU General Public License.
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32 //
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33 // This exception does not invalidate any other reasons why a work based on
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34 // this file might be covered by the GNU General Public License.
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35 //
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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37 // at http://sources.redhat.com/ecos/ecos-license
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38 // -------------------------------------------
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39 //####ECOSGPLCOPYRIGHTEND####
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40 //==========================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s): gthomas
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44 // Contributors: gthomas
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45 // Date: 2000-07-14
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46 // Purpose:
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47 // Description:
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48 //
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49 // This code is part of RedBoot (tm).
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50 //
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51 //####DESCRIPTIONEND####
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52 //
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53 //==========================================================================
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54
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55 #ifndef _NET_H_
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56 #define _NET_H_
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57
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58 #include <pkgconf/system.h>
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59 #include <pkgconf/redboot.h>
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60 #include <cyg/hal/hal_arch.h>
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61 #include <cyg/hal/basetype.h>
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62 #include <string.h>
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63
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64 extern bool net_debug;
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65 #ifdef CYGPKG_IO_ETH_DRIVERS
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66 # include <pkgconf/io_eth_drivers.h>
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67 # ifdef CYGDBG_IO_ETH_DRIVERS_DEBUG
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68 extern int cyg_io_eth_net_debug;
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69 # endif
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70 #endif
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71
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72 extern unsigned long do_ms_tick(void);
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73 extern unsigned long get_ms_ticks(void);
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74 #define MS_TICKS() get_ms_ticks()
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75 #define MS_TICKS_DELAY() do_ms_tick()
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76
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77 /* #define NET_SUPPORT_RARP 1 */
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78 #define NET_SUPPORT_ICMP 1
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79 #define NET_SUPPORT_UDP 1
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80 #define NET_SUPPORT_TCP 1
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81
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82 #if (CYG_BYTEORDER == CYG_LSBFIRST)
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83 #ifndef __LITTLE_ENDIAN__
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84 #define __LITTLE_ENDIAN__
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85 #endif
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86 extern unsigned long ntohl(unsigned long x);
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87 extern unsigned long ntohs(unsigned short x);
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88 #else
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89 #define ntohl(x) (x)
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90 #define ntohs(x) (x)
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91 #endif
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92
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93 #define htonl(x) ntohl(x)
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94 #define htons(x) ntohs(x)
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95
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96 /*
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97 * Minimum ethernet packet length.
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98 */
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99 #define ETH_MIN_PKTLEN 60
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100 #define ETH_MAX_PKTLEN (1540-14)
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101
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102 typedef unsigned char enet_addr_t[6];
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103 typedef unsigned char ip_addr_t[4];
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104
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105 typedef unsigned char octet;
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106 typedef unsigned short word;
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107 typedef unsigned int dword;
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108
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109 #ifndef NULL
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110 #define NULL 0
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111 #endif
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112
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113 // IPv4 support
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114 typedef struct in_addr {
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115 unsigned long s_addr; // IPv4 address
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116 } in_addr_t;
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117
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118 // Socket/connection information
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119 struct sockaddr_in {
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120 struct in_addr sin_addr;
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121 unsigned short sin_port;
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122 unsigned short sin_family;
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123 short sin_len;
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124 };
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125 #define AF_INET 1
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126 #define INADDR_ANY 0
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127
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128 struct timeval {
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129 unsigned long tv_sec;
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130 unsigned long tv_usec;
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131 };
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132
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133 /*
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134 * Simple timer support structure.
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135 */
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136 typedef void (*tmr_handler_t)(void *user_data);
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137
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138 /*
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139 * Timer structure.
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140 * When expiration time is met or exceeded, the handler is
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141 * called and the timer struct is removed from the list.
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142 */
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143 typedef struct _timer {
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144 struct _timer *next; /* next timer in list */
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145 unsigned long delay; /* expiration time relative to start time */
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146 unsigned long start; /* when the timer was set */
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147 tmr_handler_t handler; /* user procedure to call when timer 'fires' */
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148 void *user_data; /* user pointer passed to above procedure */
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149 } timer_t;
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150
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151
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152 /*
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153 * Ethernet header.
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154 */
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155 typedef struct {
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156 enet_addr_t destination;
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157 enet_addr_t source;
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158 word type;
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159 #define ETH_TYPE_IP 0x800
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160 #define ETH_TYPE_ARP 0x806
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161 #define ETH_TYPE_RARP 0x8053
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162 } eth_header_t;
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163
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164
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165 /*
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166 * ARP/RARP header.
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167 */
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168 typedef struct {
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169 word hw_type;
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170 #define ARP_HW_ETHER 1
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171 #define ARP_HW_EXP_ETHER 2
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172 word protocol;
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173 octet hw_len;
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174 octet proto_len;
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175 word opcode;
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176 #define ARP_REQUEST 1
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177 #define ARP_REPLY 2
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178 #define RARP_REQUEST 3
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179 #define RARP_REPLY 4
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180 enet_addr_t sender_enet;
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181 ip_addr_t sender_ip;
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182 enet_addr_t target_enet;
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183 ip_addr_t target_ip;
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184 } arp_header_t;
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185
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186
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187 #define ARP_PKT_SIZE (sizeof(arp_header_t) + sizeof(eth_header_t))
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188
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189 /*
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190 * Internet Protocol header.
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191 */
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192 typedef struct {
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193 #ifdef __LITTLE_ENDIAN__
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194 octet hdr_len:4,
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195 version:4;
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196 #else
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197 octet version:4,
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198 hdr_len:4;
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199 #endif
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200 octet tos;
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201 word length;
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202 word ident;
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203 word fragment;
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204 octet ttl;
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205 octet protocol;
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206 #define IP_PROTO_ICMP 1
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207 #define IP_PROTO_TCP 6
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208 #define IP_PROTO_UDP 17
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209 word checksum;
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210 ip_addr_t source;
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211 ip_addr_t destination;
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212 } ip_header_t;
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213
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214
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215 #define IP_PKT_SIZE (60 + sizeof(eth_header_t))
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216
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217
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218 /*
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219 * A IP<->ethernet address mapping.
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220 */
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221 typedef struct {
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222 ip_addr_t ip_addr;
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223 enet_addr_t enet_addr;
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224 } ip_route_t;
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225
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226
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227 /*
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228 * UDP header.
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229 */
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230 typedef struct {
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231 word src_port;
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232 word dest_port;
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233 word length;
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234 word checksum;
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235 } udp_header_t;
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236
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237
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238 /*
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239 * TCP header.
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240 */
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241 typedef struct {
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242 word src_port;
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243 word dest_port;
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244 dword seqnum;
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245 dword acknum;
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246 #ifdef __LITTLE_ENDIAN__
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247 octet reserved:4,
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248 hdr_len:4;
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249 #else
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250 octet hdr_len:4,
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251 reserved:4;
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252 #endif
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253 octet flags;
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254 #define TCP_FLAG_FIN 1
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255 #define TCP_FLAG_SYN 2
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256 #define TCP_FLAG_RST 4
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257 #define TCP_FLAG_PSH 8
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258 #define TCP_FLAG_ACK 16
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259 #define TCP_FLAG_URG 32
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260 word window;
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261 word checksum;
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262 word urgent;
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263 } tcp_header_t;
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264
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265
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266 /*
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267 * ICMP header.
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268 */
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269 typedef struct {
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270 octet type;
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271 #define ICMP_TYPE_ECHOREPLY 0
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272 #define ICMP_TYPE_ECHOREQUEST 8
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273 octet code;
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274 word checksum;
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275 word ident;
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276 word seqnum;
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277 } icmp_header_t;
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278
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279 typedef struct _pktbuf {
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280 struct _pktbuf *next;
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281 union {
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282 ip_header_t *__iphdr; /* pointer to IP header */
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283 arp_header_t *__arphdr; /* pointer to ARP header */
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284 } u1;
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285 #define ip_hdr u1.__iphdr
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286 #define arp_hdr u1.__arphdr
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287 union {
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288 udp_header_t *__udphdr; /* pointer to UDP header */
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289 tcp_header_t *__tcphdr; /* pointer to TCP header */
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290 icmp_header_t *__icmphdr; /* pointer to ICMP header */
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291 } u2;
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292 #define udp_hdr u2.__udphdr
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293 #define tcp_hdr u2.__tcphdr
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294 #define icmp_hdr u2.__icmphdr
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295 word pkt_bytes; /* number of data bytes in buf */
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296 word bufsize; /* size of buf */
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297 word *buf;
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298 } pktbuf_t;
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299
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300
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301 /* protocol handler */
151
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302 typedef void (*pkt_handler_t)(pktbuf_t *pkt, eth_header_t *eth_hdr);
115
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303
150
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304 /* ICMP fielder */
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305 typedef void (*icmp_handler_t)(pktbuf_t *pkt, ip_route_t *src_route);
115
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306
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307 typedef struct _udp_socket {
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308 struct _udp_socket *next;
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309 word our_port;
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310 word pad;
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311 void (*handler)(struct _udp_socket *skt, char *buf, int len,
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312 ip_route_t *src_route, word src_port);
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313 } udp_socket_t;
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314
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315
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316 typedef void (*udp_handler_t)(udp_socket_t *skt, char *buf, int len,
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317 ip_route_t *src_route, word src_port);
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318
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319
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320 typedef struct _tcp_socket {
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321 struct _tcp_socket *next;
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322 int state; /* connection state */
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323 #define _CLOSED 0
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324 #define _LISTEN 1
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325 #define _SYN_RCVD 2
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326 #define _SYN_SENT 3
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327 #define _ESTABLISHED 4
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328 #define _CLOSE_WAIT 5
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329 #define _LAST_ACK 6
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330 #define _FIN_WAIT_1 7
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331 #define _FIN_WAIT_2 8
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332 #define _CLOSING 9
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333 #define _TIME_WAIT 10
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334 ip_route_t his_addr; /* address of other end of connection */
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335 word our_port;
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336 word his_port;
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337 word data_bytes; /* number of data bytes in pkt */
208
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338 char reuse; /* SO_REUSEADDR, no 2MSL */
115
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339 timer_t timer;
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340 pktbuf_t pkt; /* dedicated xmit packet */
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341 pktbuf_t *rxlist; /* list of unread incoming data packets */
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342 char *rxptr; /* pointer to next byte to read */
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343 int rxcnt; /* bytes left in current read packet */
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344 dword ack;
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345 dword seq;
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346 char pktbuf[ETH_MAX_PKTLEN];
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347 } tcp_socket_t;
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348
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349 /*
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350 * Our address.
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351 */
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352 extern enet_addr_t __local_enet_addr;
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353 extern ip_addr_t __local_ip_addr;
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354
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355
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356 /*
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357 * Set a timer. Caller is responsible for providing the timer_t struct.
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358 */
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359 extern void __timer_set(timer_t *t, unsigned long delay,
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360 tmr_handler_t handler, void *user_data);
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361
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362 /*
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363 * Cancel the given timer.
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364 */
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365 extern void __timer_cancel(timer_t *t);
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366
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367 /*
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368 * Poll timer list for timer expirations.
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369 */
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370 extern void __timer_poll(void);
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371
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372 /*
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373 * Initialize the free list.
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374 */
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375 extern void __pktbuf_init(void);
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376
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377 /*
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378 * simple pktbuf allocation.
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379 * allocates at least nbytes for packet data including ethernet header.
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380 */
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381 extern pktbuf_t *__pktbuf_alloc(int nbytes);
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382
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383 /*
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384 * return a pktbuf for reuse.
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385 */
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386 extern void __pktbuf_free(pktbuf_t *pkt);
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387
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388 /*
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389 * Dump packet structures (debug, in case of running out)
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390 */
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391 extern void __pktbuf_dump(void);
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392
115
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393
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394 /*
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395 * Install handlers for ethernet packets.
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396 * Returns old handler.
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397 */
151
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398 extern pkt_handler_t __eth_install_listener(int eth_type,
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399 pkt_handler_t handler);
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400 extern void __eth_remove_listener(int eth_type);
115
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401
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402 /*
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403 * Non-blocking poll of ethernet link. Processes all pending
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404 * input packets.
115
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405 */
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406 extern void __enet_poll(void);
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407
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408 /*
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409 * Send an ethernet packet.
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410 */
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411 extern void __enet_send(pktbuf_t *pkt, enet_addr_t *dest, int eth_type);
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412
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413
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414 /*
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415 * Handle incoming ARP packets.
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416 */
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417 extern void __arp_handler(pktbuf_t *pkt);
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418
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419 /*
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420 * Find the ethernet address of the machine with the given
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421 * ip address.
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422 * Return true and fills in 'eth_addr' if successful, false
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423 * if unsuccessful.
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424 */
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425 extern int __arp_request(ip_addr_t *ip_addr, enet_addr_t *eth_addr);
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426
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427 /*
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428 * Lookup an address from the local ARP cache. If not found,
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429 * then call 'arp_request' to find it. [Basically just a cached
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430 * version of 'arp_request']
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431 */
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432 extern int __arp_lookup(ip_addr_t *host, ip_route_t *rt);
115
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433
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434 /*
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435 * Do a one's complement checksum.
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436 * The data being checksum'd is in network byte order.
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437 * The returned checksum is in network byte order.
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438 */
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439 extern unsigned short __sum(word *w, int len, int init_sum);
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440
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441 /*
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442 * Compute a partial checksum for the UDP/TCP pseudo header.
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443 */
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444 extern int __pseudo_sum(ip_header_t *ip);
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445
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446 /*
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447 * Handle IP packets coming from the polled ethernet interface.
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448 */
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449 extern void __ip_handler(pktbuf_t *pkt, enet_addr_t *src_enet_addr);
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450
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451 /*
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452 * Send an IP packet.
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453 *
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454 * The IP data field should contain pkt->pkt_bytes of data.
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455 * pkt->[udp|tcp|icmp]_hdr points to the IP data field. Any
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456 * IP options are assumed to be already in place in the IP
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457 * options field.
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458 */
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459 extern void __ip_send(pktbuf_t *pkt, int protocol, ip_route_t *dest);
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460
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461
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diff changeset
462 /*
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463 * Handle incoming ICMP packets.
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464 */
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465 extern void __icmp_handler(pktbuf_t *pkt, ip_route_t *r);
150
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466 extern int __icmp_install_listener(icmp_handler_t handler);
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467 extern void __icmp_remove_listener(void);
115
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468
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469 /*
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470 * Handle incoming UDP packets.
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471 */
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472 extern void __udp_handler(pktbuf_t *pkt, ip_route_t *r);
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473
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474 /*
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475 * Install a handler for incoming udp packets.
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476 * Caller provides the udp_socket_t structure.
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477 * Returns zero if successful, -1 if socket is already used.
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478 */
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479 extern int __udp_install_listener(udp_socket_t *s, word port,
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480 udp_handler_t handler);
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481
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diff changeset
482 /*
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483 * Remove the handler for the given socket.
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484 */
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485 extern void __udp_remove_listener(word port);
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486
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487 /*
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488 * Send a UDP packet.
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489 */
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490 extern void __udp_send(char *buf, int len, ip_route_t *dest_ip,
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491 word dest_port, word src_port);
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492
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493 // Send a UDP packet
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494 extern int __udp_sendto(char *buf, int len,
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495 struct sockaddr_in *server, struct sockaddr_in *local);
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496
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497 // Receive a UDP packet
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498 extern int __udp_recvfrom(char *buf, int len,
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499 struct sockaddr_in *from, struct sockaddr_in *local,
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500 struct timeval *timeout);
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501
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502 /*
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503 * TCP poll function. Should be called as often as possible.
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504 */
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505 extern void __tcp_poll(void);
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506
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diff changeset
507 /*
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diff changeset
508 * Set up a listening socket on the given port.
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509 * Does not block.
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510 */
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511 extern int __tcp_listen(tcp_socket_t *s, word port);
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512
208
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diff changeset
513 /*
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514 * SO_REUSEADDR, no 2MSL.
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515 */
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516 extern void __tcp_so_reuseaddr(tcp_socket_t *s);
115
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517
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518 /*
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519 * Block while waiting for all outstanding socket data to
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520 * be transmitted.
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521 */
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522 extern void __tcp_drain(tcp_socket_t *s);
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523
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524
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525 /*
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526 * Initiate connection close.
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527 */
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528 extern void __tcp_close(tcp_socket_t *s);
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529
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530 /*
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531 * Wait until connection has fully closed.
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532 */
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533 extern void __tcp_close_wait(tcp_socket_t *s);
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534
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535 /*
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536 * Read up to 'len' bytes without blocking.
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537 * Returns number of bytes read.
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538 * If connection is closed, returns -1.
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539 */
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540 extern int __tcp_read(tcp_socket_t *s, char *buf, int len);
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541
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542 /*
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diff changeset
543 * Write up to 'len' bytes without blocking.
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544 * Returns number of bytes written.
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545 * If connection is closed, returns -1.
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546 */
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547 extern int __tcp_write(tcp_socket_t *s, char *buf, int len);
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548
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549
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diff changeset
550 /*
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551 * The following are a higher-level tcp socket interface.
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552 */
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553
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diff changeset
554 /*
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555 * Initialize a socket for given port.
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556 */
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557 extern void __skt_init(tcp_socket_t *s, unsigned short port);
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558
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559 /*
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diff changeset
560 * Return true if socket connection is closed.
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561 */
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562 #define __skt_is_closed(s) (((tcp_socket_t *)(s))->state == _CLOSED)
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563
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diff changeset
564 /*
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diff changeset
565 * Block while listening for an incoming connection.
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566 */
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567 extern void __skt_wait_for_connect(tcp_socket_t *s);
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diff changeset
568
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diff changeset
569 /*
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570 * Read up to 'len' bytes from the given socket.
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diff changeset
571 * Returns number of bytes read.
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572 * Doesn't block.
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573 */
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574 extern int __skt_read(tcp_socket_t *s, char *buf, int len);
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575
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576 /*
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577 * Write 'len' bytes to the given socket.
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578 * Returns number of bytes written.
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579 * May not write all data if connection closes.
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580 */
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581 extern int __skt_write(tcp_socket_t *s, char *buf, int len);
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582
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583 // Initialize the network stack - logical driver layer, etc.
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584 extern void net_init(void);
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585
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586 // Test for new network I/O connections
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587 extern void net_io_test(bool is_idle);
115
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588
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589 // Conversion between IP addresses and printable strings
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590 extern bool inet_aton(const char *, in_addr_t *);
115
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591 extern char *inet_ntoa(in_addr_t *);
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592
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593 // FIXME
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594 /* #define NET_SUPPORT_RARP 1 */
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595 #define NET_SUPPORT_ICMP 1
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596 #define NET_SUPPORT_UDP 1
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597 #define NET_SUPPORT_TCP 1
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598
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599 #ifdef BSP_LOG
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600 #define BSPLOG(x) { int old_console = start_console(); x; end_console(old_console); }
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601 #define bsp_log diag_printf
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602 #else
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603 #define BSPLOG(x)
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604 #endif
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605
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606 #endif // _NET_H_