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annotate packages/redboot/current/include/net/net.h @ 231:4ebdd3788c30

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Merge gateway support from Grant Edwards
author gthomas
date Tue, 09 Jul 2002 20:23:47 +0000
parents d2c90368aeef
children 56f2780a49bc
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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 // Copyright (C) 2002 Gary Thomas
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13 //
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14 // eCos is free software; you can redistribute it and/or modify it under
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15 // the terms of the GNU General Public License as published by the Free
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16 // Software Foundation; either version 2 or (at your option) any later version.
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17 //
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18 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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19 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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21 // for more details.
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22 //
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23 // You should have received a copy of the GNU General Public License along
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24 // with eCos; if not, write to the Free Software Foundation, Inc.,
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25 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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26 //
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27 // As a special exception, if other files instantiate templates or use macros
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28 // or inline functions from this file, or you compile this file and link it
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29 // with other works to produce a work based on this file, this file does not
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30 // by itself cause the resulting work to be covered by the GNU General Public
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31 // License. However the source code for this file must still be made available
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32 // in accordance with section (3) of the GNU General Public License.
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33 //
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34 // This exception does not invalidate any other reasons why a work based on
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35 // this file might be covered by the GNU General Public License.
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36 //
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37 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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38 // at http://sources.redhat.com/ecos/ecos-license/
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39 // -------------------------------------------
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40 //####ECOSGPLCOPYRIGHTEND####
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41 //==========================================================================
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42 //#####DESCRIPTIONBEGIN####
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43 //
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44 // Author(s): gthomas
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45 // Contributors: gthomas
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46 // Date: 2000-07-14
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47 // Purpose:
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48 // Description:
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49 //
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50 // This code is part of RedBoot (tm).
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51 //
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52 //####DESCRIPTIONEND####
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53 //
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54 //==========================================================================
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55
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56 #ifndef _NET_H_
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57 #define _NET_H_
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58
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59 #include <pkgconf/system.h>
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60 #include <pkgconf/redboot.h>
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61 #include <cyg/hal/hal_arch.h>
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62 #include <cyg/hal/basetype.h>
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63 #include <string.h>
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64
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65 extern bool net_debug;
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66 #ifdef CYGPKG_IO_ETH_DRIVERS
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67 # include <pkgconf/io_eth_drivers.h>
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68 # ifdef CYGDBG_IO_ETH_DRIVERS_DEBUG
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69 extern int cyg_io_eth_net_debug;
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70 # endif
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71 #endif
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73 extern unsigned long do_ms_tick(void);
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74 extern unsigned long get_ms_ticks(void);
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75 #define MS_TICKS() get_ms_ticks()
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76 #define MS_TICKS_DELAY() do_ms_tick()
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77
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78 /* #define NET_SUPPORT_RARP 1 */
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79 #define NET_SUPPORT_ICMP 1
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80 #define NET_SUPPORT_UDP 1
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81 #define NET_SUPPORT_TCP 1
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82
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83 #if (CYG_BYTEORDER == CYG_LSBFIRST)
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84 #ifndef __LITTLE_ENDIAN__
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85 #define __LITTLE_ENDIAN__
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86 #endif
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87 extern unsigned long ntohl(unsigned long x);
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88 extern unsigned long ntohs(unsigned short x);
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89 #else
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90 #define ntohl(x) (x)
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91 #define ntohs(x) (x)
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92 #endif
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93
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94 #define htonl(x) ntohl(x)
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95 #define htons(x) ntohs(x)
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96
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97 /*
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98 * Minimum ethernet packet length.
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99 */
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100 #define ETH_MIN_PKTLEN 60
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101 #define ETH_MAX_PKTLEN (1540-14)
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102 #define ETH_HDR_SIZE 14
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103
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104 typedef unsigned char enet_addr_t[6];
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105 typedef unsigned char ip_addr_t[4];
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106
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107 typedef unsigned char octet;
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108 typedef unsigned short word;
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109 typedef unsigned int dword;
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110
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111 #ifndef NULL
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112 #define NULL 0
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113 #endif
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114
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115 // IPv4 support
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116 typedef struct in_addr {
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117 unsigned long s_addr; // IPv4 address
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118 } in_addr_t;
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119
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120 // Socket/connection information
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121 struct sockaddr_in {
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122 struct in_addr sin_addr;
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123 unsigned short sin_port;
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124 unsigned short sin_family;
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125 short sin_len;
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126 };
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127 #define AF_INET 1
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128 #define INADDR_ANY 0
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129
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130 struct timeval {
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131 unsigned long tv_sec;
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132 unsigned long tv_usec;
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133 };
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134
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135 /*
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136 * Simple timer support structure.
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137 */
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138 typedef void (*tmr_handler_t)(void *user_data);
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139
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140 /*
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141 * Timer structure.
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142 * When expiration time is met or exceeded, the handler is
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143 * called and the timer struct is removed from the list.
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144 */
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145 typedef struct _timer {
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146 struct _timer *next; /* next timer in list */
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147 unsigned long delay; /* expiration time relative to start time */
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148 unsigned long start; /* when the timer was set */
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149 tmr_handler_t handler; /* user procedure to call when timer 'fires' */
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150 void *user_data; /* user pointer passed to above procedure */
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151 } timer_t;
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152
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153
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154 /*
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155 * Ethernet header.
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156 */
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157 typedef struct {
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158 enet_addr_t destination;
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159 enet_addr_t source;
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160 word type;
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161 #define ETH_TYPE_IP 0x800
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162 #define ETH_TYPE_ARP 0x806
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163 #define ETH_TYPE_RARP 0x8053
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164 } eth_header_t;
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165
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166
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167 /*
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168 * ARP/RARP header.
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169 */
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170 typedef struct {
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171 word hw_type;
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172 #define ARP_HW_ETHER 1
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173 #define ARP_HW_EXP_ETHER 2
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174 word protocol;
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175 octet hw_len;
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176 octet proto_len;
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177 word opcode;
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178 #define ARP_REQUEST 1
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179 #define ARP_REPLY 2
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180 #define RARP_REQUEST 3
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181 #define RARP_REPLY 4
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182 enet_addr_t sender_enet;
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183 ip_addr_t sender_ip;
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184 enet_addr_t target_enet;
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185 ip_addr_t target_ip;
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186 } arp_header_t;
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187
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188
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189 #define ARP_PKT_SIZE (sizeof(arp_header_t) + ETH_HDR_SIZE)
115
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190
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191 /*
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192 * Internet Protocol header.
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193 */
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194 typedef struct {
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195 #ifdef __LITTLE_ENDIAN__
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196 octet hdr_len:4,
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197 version:4;
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198 #else
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199 octet version:4,
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200 hdr_len:4;
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201 #endif
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202 octet tos;
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203 word length;
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204 word ident;
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205 word fragment;
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206 octet ttl;
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207 octet protocol;
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208 #define IP_PROTO_ICMP 1
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209 #define IP_PROTO_TCP 6
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210 #define IP_PROTO_UDP 17
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211 word checksum;
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212 ip_addr_t source;
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213 ip_addr_t destination;
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214 } ip_header_t;
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215
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216
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217 #define IP_PKT_SIZE (60 + ETH_HDR_SIZE)
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218
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219
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220 /*
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221 * A IP<->ethernet address mapping.
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222 */
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223 typedef struct {
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224 ip_addr_t ip_addr;
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225 enet_addr_t enet_addr;
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226 } ip_route_t;
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227
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228
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229 /*
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230 * UDP header.
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231 */
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232 typedef struct {
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233 word src_port;
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234 word dest_port;
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235 word length;
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236 word checksum;
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237 } udp_header_t;
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238
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239
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240 /*
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241 * TCP header.
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242 */
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243 typedef struct {
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244 word src_port;
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245 word dest_port;
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246 dword seqnum;
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247 dword acknum;
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248 #ifdef __LITTLE_ENDIAN__
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249 octet reserved:4,
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250 hdr_len:4;
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251 #else
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252 octet hdr_len:4,
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253 reserved:4;
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254 #endif
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255 octet flags;
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256 #define TCP_FLAG_FIN 1
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257 #define TCP_FLAG_SYN 2
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258 #define TCP_FLAG_RST 4
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259 #define TCP_FLAG_PSH 8
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260 #define TCP_FLAG_ACK 16
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261 #define TCP_FLAG_URG 32
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262 word window;
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263 word checksum;
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264 word urgent;
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265 } tcp_header_t;
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266
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267
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268 /*
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269 * ICMP header.
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270 */
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271 typedef struct {
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272 octet type;
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273 #define ICMP_TYPE_ECHOREPLY 0
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274 #define ICMP_TYPE_ECHOREQUEST 8
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275 octet code;
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276 word checksum;
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277 word ident;
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278 word seqnum;
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279 } icmp_header_t;
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280
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281 typedef struct _pktbuf {
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282 struct _pktbuf *next;
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283 union {
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284 ip_header_t *__iphdr; /* pointer to IP header */
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285 arp_header_t *__arphdr; /* pointer to ARP header */
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286 } u1;
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287 #define ip_hdr u1.__iphdr
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288 #define arp_hdr u1.__arphdr
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289 union {
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290 udp_header_t *__udphdr; /* pointer to UDP header */
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291 tcp_header_t *__tcphdr; /* pointer to TCP header */
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292 icmp_header_t *__icmphdr; /* pointer to ICMP header */
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293 } u2;
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294 #define udp_hdr u2.__udphdr
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295 #define tcp_hdr u2.__tcphdr
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296 #define icmp_hdr u2.__icmphdr
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297 word pkt_bytes; /* number of data bytes in buf */
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298 word bufsize; /* size of buf */
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299 word *buf;
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300 } pktbuf_t;
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301
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302
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303 /* protocol handler */
151
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304 typedef void (*pkt_handler_t)(pktbuf_t *pkt, eth_header_t *eth_hdr);
115
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305
150
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306 /* ICMP fielder */
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307 typedef void (*icmp_handler_t)(pktbuf_t *pkt, ip_route_t *src_route);
115
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308
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309 typedef struct _udp_socket {
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310 struct _udp_socket *next;
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311 word our_port;
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312 word pad;
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313 void (*handler)(struct _udp_socket *skt, char *buf, int len,
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314 ip_route_t *src_route, word src_port);
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315 } udp_socket_t;
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316
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317
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318 typedef void (*udp_handler_t)(udp_socket_t *skt, char *buf, int len,
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319 ip_route_t *src_route, word src_port);
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320
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321
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322 typedef struct _tcp_socket {
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323 struct _tcp_socket *next;
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324 int state; /* connection state */
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325 #define _CLOSED 0
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326 #define _LISTEN 1
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327 #define _SYN_RCVD 2
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328 #define _SYN_SENT 3
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329 #define _ESTABLISHED 4
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330 #define _CLOSE_WAIT 5
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331 #define _LAST_ACK 6
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332 #define _FIN_WAIT_1 7
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333 #define _FIN_WAIT_2 8
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334 #define _CLOSING 9
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335 #define _TIME_WAIT 10
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336 ip_route_t his_addr; /* address of other end of connection */
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337 word our_port;
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338 word his_port;
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339 word data_bytes; /* number of data bytes in pkt */
208
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340 char reuse; /* SO_REUSEADDR, no 2MSL */
115
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341 timer_t timer;
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342 pktbuf_t pkt; /* dedicated xmit packet */
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343 pktbuf_t *rxlist; /* list of unread incoming data packets */
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344 char *rxptr; /* pointer to next byte to read */
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345 int rxcnt; /* bytes left in current read packet */
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346 dword ack;
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347 dword seq;
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348 char pktbuf[ETH_MAX_PKTLEN];
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349 } tcp_socket_t;
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350
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351 /*
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352 * Our address.
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353 */
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354 extern enet_addr_t __local_enet_addr;
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355 extern ip_addr_t __local_ip_addr;
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356 #ifdef CYGSEM_REDBOOT_NETWORKING_USE_GATEWAY
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357 extern ip_addr_t __local_ip_gate;
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358 extern ip_addr_t __local_ip_mask;
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359 #endif
115
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360
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361 /*
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362 * Set a timer. Caller is responsible for providing the timer_t struct.
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363 */
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364 extern void __timer_set(timer_t *t, unsigned long delay,
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365 tmr_handler_t handler, void *user_data);
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366
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367 /*
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368 * Cancel the given timer.
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369 */
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370 extern void __timer_cancel(timer_t *t);
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371
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372 /*
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373 * Poll timer list for timer expirations.
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374 */
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375 extern void __timer_poll(void);
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376
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377 /*
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378 * Initialize the free list.
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379 */
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380 extern void __pktbuf_init(void);
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381
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382 /*
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383 * simple pktbuf allocation.
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384 * allocates at least nbytes for packet data including ethernet header.
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385 */
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386 extern pktbuf_t *__pktbuf_alloc(int nbytes);
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387
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388 /*
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389 * return a pktbuf for reuse.
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390 */
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391 extern void __pktbuf_free(pktbuf_t *pkt);
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392
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393 /*
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394 * Dump packet structures (debug, in case of running out)
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395 */
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396 extern void __pktbuf_dump(void);
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397
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398
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399 /*
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400 * Install handlers for ethernet packets.
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401 * Returns old handler.
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402 */
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403 extern pkt_handler_t __eth_install_listener(int eth_type,
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404 pkt_handler_t handler);
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405 extern void __eth_remove_listener(int eth_type);
115
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406
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407 /*
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408 * Non-blocking poll of ethernet link. Processes all pending
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409 * input packets.
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410 */
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411 extern void __enet_poll(void);
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412
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413 /*
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414 * Send an ethernet packet.
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415 */
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416 extern void __enet_send(pktbuf_t *pkt, enet_addr_t *dest, int eth_type);
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417
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418 #ifdef CYGSEM_REDBOOT_NETWORKING_USE_GATEWAY
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419 /*
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420 * return true if addr is on local subnet
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421 */
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422 extern int __ip_addr_local(ip_addr_t *addr);
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423 #endif
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424
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425 /*
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426 * Handle incoming ARP packets.
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427 */
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428 extern void __arp_handler(pktbuf_t *pkt);
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429
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430 /*
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431 * Find the ethernet address of the machine with the given
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432 * ip address.
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433 * Return true and fills in 'eth_addr' if successful, false
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434 * if unsuccessful.
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435 */
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436 extern int __arp_request(ip_addr_t *ip_addr, enet_addr_t *eth_addr);
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437
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438 /*
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439 * Lookup an address from the local ARP cache. If not found,
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440 * then call 'arp_request' to find it. [Basically just a cached
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441 * version of 'arp_request']
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442 */
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443 extern int __arp_lookup(ip_addr_t *host, ip_route_t *rt);
115
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444
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445 /*
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446 * Do a one's complement checksum.
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447 * The data being checksum'd is in network byte order.
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448 * The returned checksum is in network byte order.
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449 */
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450 extern unsigned short __sum(word *w, int len, int init_sum);
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451
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diff changeset
452 /*
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diff changeset
453 * Compute a partial checksum for the UDP/TCP pseudo header.
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454 */
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455 extern int __pseudo_sum(ip_header_t *ip);
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456
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457 /*
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458 * Handle IP packets coming from the polled ethernet interface.
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459 */
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460 extern void __ip_handler(pktbuf_t *pkt, enet_addr_t *src_enet_addr);
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461
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462 /*
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463 * Send an IP packet.
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464 *
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465 * The IP data field should contain pkt->pkt_bytes of data.
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466 * pkt->[udp|tcp|icmp]_hdr points to the IP data field. Any
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467 * IP options are assumed to be already in place in the IP
231
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468 * options field. Returns 0 for success.
115
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469 */
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470 extern int __ip_send(pktbuf_t *pkt, int protocol, ip_route_t *dest);
115
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471
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472
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473 /*
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474 * Handle incoming ICMP packets.
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475 */
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476 extern void __icmp_handler(pktbuf_t *pkt, ip_route_t *r);
150
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477 extern int __icmp_install_listener(icmp_handler_t handler);
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478 extern void __icmp_remove_listener(void);
115
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479
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480 /*
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481 * Handle incoming UDP packets.
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482 */
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483 extern void __udp_handler(pktbuf_t *pkt, ip_route_t *r);
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484
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485 /*
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486 * Install a handler for incoming udp packets.
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487 * Caller provides the udp_socket_t structure.
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488 * Returns zero if successful, -1 if socket is already used.
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489 */
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490 extern int __udp_install_listener(udp_socket_t *s, word port,
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491 udp_handler_t handler);
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492
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493 /*
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494 * Remove the handler for the given socket.
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495 */
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496 extern void __udp_remove_listener(word port);
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497
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diff changeset
498 /*
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499 * Send a UDP packet.
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500 */
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501 extern int __udp_send(char *buf, int len, ip_route_t *dest_ip,
115
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502 word dest_port, word src_port);
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503
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504 // Send a UDP packet
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505 extern int __udp_sendto(char *buf, int len,
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506 struct sockaddr_in *server, struct sockaddr_in *local);
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507
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508 // Receive a UDP packet
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509 extern int __udp_recvfrom(char *buf, int len,
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510 struct sockaddr_in *from, struct sockaddr_in *local,
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511 struct timeval *timeout);
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512
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513 /*
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514 * TCP poll function. Should be called as often as possible.
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515 */
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516 extern void __tcp_poll(void);
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517
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518 /*
210
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519 * Initiate outgoing connection, waiting for at most timeout seconds.
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520 */
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521 extern int __tcp_open(tcp_socket_t *s, struct sockaddr_in *host,
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522 word port, int timeout, int *err);
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523
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524 /*
115
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525 * Set up a listening socket on the given port.
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526 * Does not block.
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527 */
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528 extern int __tcp_listen(tcp_socket_t *s, word port);
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529
208
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530 /*
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531 * SO_REUSEADDR, no 2MSL.
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532 */
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533 extern void __tcp_so_reuseaddr(tcp_socket_t *s);
115
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534
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535 /*
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diff changeset
536 * Block while waiting for all outstanding socket data to
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diff changeset
537 * be transmitted.
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diff changeset
538 */
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539 extern void __tcp_drain(tcp_socket_t *s);
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diff changeset
540
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diff changeset
541 /*
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542 * Initiate connection close.
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543 */
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544 extern void __tcp_close(tcp_socket_t *s);
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545
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diff changeset
546 /*
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diff changeset
547 * Wait until connection has fully closed.
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548 */
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549 extern void __tcp_close_wait(tcp_socket_t *s);
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550
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diff changeset
551 /*
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diff changeset
552 * Read up to 'len' bytes without blocking.
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diff changeset
553 * Returns number of bytes read.
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554 * If connection is closed, returns -1.
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555 */
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556 extern int __tcp_read(tcp_socket_t *s, char *buf, int len);
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diff changeset
557
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diff changeset
558 /*
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diff changeset
559 * Write up to 'len' bytes without blocking.
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diff changeset
560 * Returns number of bytes written.
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diff changeset
561 * If connection is closed, returns -1.
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562 */
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563 extern int __tcp_write(tcp_socket_t *s, char *buf, int len);
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564
210
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565 /*
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566 * Write up to 'len' bytes, blocking until sent (not ACK'd).
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567 * Returns number of bytes written.
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568 * If connection is closed, returns -1.
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569 */
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570 extern int __tcp_write_block(tcp_socket_t *s, char *buf, int len);
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571
115
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572
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573 /*
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574 * The following are a higher-level tcp socket interface.
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575 */
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576
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diff changeset
577 /*
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578 * Initialize a socket for given port.
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579 */
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580 extern void __skt_init(tcp_socket_t *s, unsigned short port);
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581
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582 /*
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583 * Return true if socket connection is closed.
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584 */
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585 #define __skt_is_closed(s) (((tcp_socket_t *)(s))->state == _CLOSED)
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586
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587 /*
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588 * Block while listening for an incoming connection.
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589 */
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590 extern void __skt_wait_for_connect(tcp_socket_t *s);
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591
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592 /*
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593 * Read up to 'len' bytes from the given socket.
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594 * Returns number of bytes read.
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595 * Doesn't block.
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596 */
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597 extern int __skt_read(tcp_socket_t *s, char *buf, int len);
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598
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599 /*
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600 * Write 'len' bytes to the given socket.
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601 * Returns number of bytes written.
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602 * May not write all data if connection closes.
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603 */
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604 extern int __skt_write(tcp_socket_t *s, char *buf, int len);
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605
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606 // Initialize the network stack - logical driver layer, etc.
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607 extern void net_init(void);
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608
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609 // Test for new network I/O connections
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610 extern void net_io_test(bool is_idle);
115
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611
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612 // Conversion between IP addresses and printable strings
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613 extern bool inet_aton(const char *, in_addr_t *);
115
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614 extern char *inet_ntoa(in_addr_t *);
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615
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616 // FIXME
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617 /* #define NET_SUPPORT_RARP 1 */
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618 #define NET_SUPPORT_ICMP 1
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619 #define NET_SUPPORT_UDP 1
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620 #define NET_SUPPORT_TCP 1
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621
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622 #ifdef BSP_LOG
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623 #define BSPLOG(x) { int old_console = start_console(); x; end_console(old_console); }
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624 #define bsp_log diag_printf
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625 #else
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626 #define BSPLOG(x)
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627 #endif
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628
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629 #endif // _NET_H_