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3846 | mejdrech | 1 | /* |
3912 | mejdrech | 2 | * Copyright (c) 2009 Lukas Mejdrech |
3846 | mejdrech | 3 | * All rights reserved. |
4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
29 | /** @addtogroup arp |
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30 | * @{ |
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31 | */ |
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32 | |||
33 | /** @file |
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3912 | mejdrech | 34 | * ARP module implementation. |
35 | * @see arp.h |
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3846 | mejdrech | 36 | */ |
37 | |||
38 | #include <async.h> |
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39 | #include <malloc.h> |
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4192 | mejdrech | 40 | #include <mem.h> |
3991 | mejdrech | 41 | #include <rwlock.h> |
3846 | mejdrech | 42 | #include <stdio.h> |
43 | |||
44 | #include <ipc/ipc.h> |
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45 | #include <ipc/services.h> |
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46 | |||
3886 | mejdrech | 47 | #include "../../err.h" |
48 | #include "../../messages.h" |
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49 | #include "../../modules.h" |
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3846 | mejdrech | 50 | |
3886 | mejdrech | 51 | #include "../../include/protocol_map.h" |
52 | #include "../../netif/device.h" |
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3846 | mejdrech | 53 | |
3886 | mejdrech | 54 | #include "../../structures/measured_strings.h" |
55 | #include "../../structures/packet/packet.h" |
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3901 | mejdrech | 56 | #include "../../structures/packet/packet_client.h" |
3886 | mejdrech | 57 | |
3846 | mejdrech | 58 | #include "arp.h" |
59 | #include "arp_header.h" |
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60 | #include "arp_oc.h" |
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61 | //#include "arp_messages.h" |
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62 | #include "arp_module.h" |
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63 | |||
3912 | mejdrech | 64 | /** Returns the device identifier message parameter. |
65 | */ |
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3846 | mejdrech | 66 | #define IPC_GET_DEVICE( call ) ( device_id_t ) IPC_GET_ARG1( * call ) |
3912 | mejdrech | 67 | |
68 | /** Returns the packet identifier message parameter. |
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69 | */ |
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3901 | mejdrech | 70 | #define IPC_GET_PACKET( call ) ( packet_id_t ) IPC_GET_ARG2( * call ) |
3912 | mejdrech | 71 | |
72 | /** Returns the protocol service message parameter. |
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73 | */ |
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3846 | mejdrech | 74 | #define IPC_GET_PROTO( call ) ( services_t ) IPC_GET_ARG2( * call ) |
3912 | mejdrech | 75 | |
76 | /** Returns the device driver service message parameter. |
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77 | */ |
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3846 | mejdrech | 78 | #define IPC_GET_SERVICE( call ) ( services_t ) IPC_GET_ARG3( * call ) |
79 | |||
3912 | mejdrech | 80 | /** ARP global data. |
81 | */ |
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3846 | mejdrech | 82 | arp_globals_t arp_globals; |
83 | |||
3912 | mejdrech | 84 | /** Creates new protocol specific data. |
85 | * @param proto Protocol specific data. Output parameter. |
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86 | * @param service Protocol module service. Input parameter. |
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87 | * @param address Actual protocol device address. Input parameter. |
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88 | * @returns EOK on success. |
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89 | * @returns ENOMEM if there is not enough memory left. |
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90 | */ |
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91 | int arp_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address ); |
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92 | |||
93 | /** Registers the device. |
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94 | * Creates new device entry in the cache or updates the protocol address if the device with the device identifier and the driver service exists. |
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95 | * @param device_id The device identifier. Input parameter. |
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96 | * @param service The device driver service. Input parameter. |
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97 | * @param protocol The protocol service. Input parameter. |
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98 | * @param address The actual device protocol address. |
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99 | * @returns EOK on success. |
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100 | * @returns EEXIST if another device with the same device identifier and different driver service exists. |
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101 | * @returns ENOMEM if there is not enough memory left. |
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102 | * @returns Other error codes as defined for the measured_strings_return() function. |
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103 | */ |
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104 | int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address ); |
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105 | |||
106 | /** Returns the hardware address for the given protocol address. |
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107 | * Sends the ARP request packet if the hardware address is not found in the cache. |
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108 | * @param device_id The device identifier. Input parameter. |
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109 | * @param protocol The protocol service. Input parameter. |
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110 | * @param target The target protocol address. Input parameter. |
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111 | * @returns The hardware address of the target. |
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112 | * @returns NULL if the target parameter is NULL. |
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113 | * @returns NULL if the device is not found. |
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114 | * @returns NULL if the device packet is too small to send a request. |
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115 | * @returns NULL if the hardware address is not found in the cache. |
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116 | */ |
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117 | measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target ); |
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118 | |||
119 | /** Processes the received ARP packet. |
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120 | * Updates the source hardware address if the source entry exists or the packet is targeted to my protocol address. |
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121 | * Responses to the ARP request if the packet is the ARP request and is targeted to my address. |
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122 | * @param device_id The source device identifier. Input parameter. |
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123 | * @param packet The received packet. Input/output parameter. |
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124 | * @returns EOK on success. |
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125 | * @returns EINVAL if the packet is too small to carry the ARP packet. |
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126 | * @returns EINVAL if the received address lengths differs from the registered values. |
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127 | * @returns ENOENT if the device is not found in the cache. |
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128 | * @returns ENOENT if the protocol for the device is not found in the cache. |
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129 | * @returns ENOMEM if there is not enough memory left. |
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130 | */ |
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131 | int arp_receive_message( device_id_t device_id, packet_t packet ); |
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132 | |||
133 | /** Clears the device specific data from the cache. |
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134 | * @param device_id The device identifier. Input parameter. |
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135 | * @returns EOK on success. |
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136 | * @returns ENOENT if the device is not found in the cache. |
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137 | */ |
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138 | int arp_clear_device_message( device_id_t device_id ); |
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139 | |||
140 | /** Clears the device specific data. |
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141 | * @param device The device specific data. |
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142 | */ |
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143 | void clear_device( arp_device_ref device ); |
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144 | |||
145 | /** Clears the whole cache. |
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146 | * @returns EOK on success. |
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147 | */ |
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148 | int arp_clean_cache_message( void ); |
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149 | |||
150 | /** Processes IPC messages from the registered device driver modules in an infinite loop. |
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151 | * @param iid The message identifier. Input parameter. |
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152 | * @param icall The message parameters. Input/output parameter. |
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153 | */ |
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154 | void arp_receiver( ipc_callid_t iid, ipc_call_t * icall ); |
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155 | |||
3846 | mejdrech | 156 | DEVICE_MAP_IMPLEMENT( arp_cache, arp_device_t ) |
157 | |||
158 | INT_MAP_IMPLEMENT( arp_protos, arp_proto_t ) |
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159 | |||
160 | GENERIC_CHAR_MAP_IMPLEMENT( arp_addr, measured_string_t ) |
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161 | |||
162 | int arp_initialize( void ){ |
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3991 | mejdrech | 163 | ERROR_DECLARE; |
164 | |||
165 | rwlock_initialize( & arp_globals.lock ); |
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166 | rwlock_write_lock( & arp_globals.lock ); |
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167 | ERROR_PROPAGATE( arp_cache_initialize( & arp_globals.cache )); |
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168 | rwlock_write_unlock( & arp_globals.lock ); |
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169 | return EOK; |
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3846 | mejdrech | 170 | } |
171 | |||
172 | int arp_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address ){ |
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173 | ERROR_DECLARE; |
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174 | |||
175 | * proto = ( arp_proto_ref ) malloc( sizeof( arp_proto_t )); |
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176 | if( !( * proto )) return ENOMEM; |
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177 | ( ** proto ).service = service; |
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178 | ( ** proto ).addr = address; |
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179 | ( ** proto ).addr_data = address->value; |
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3912 | mejdrech | 180 | if( ERROR_OCCURRED( arp_addr_initialize( &( ** proto).addresses ))){ |
3846 | mejdrech | 181 | free( * proto ); |
182 | return ERROR_CODE; |
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183 | } |
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184 | return EOK; |
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185 | } |
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186 | |||
187 | int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address ){ |
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188 | ERROR_DECLARE; |
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189 | |||
190 | arp_device_ref device; |
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191 | aid_t message; |
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192 | ipc_call_t answer; |
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193 | ipcarg_t result; |
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194 | arp_proto_ref proto; |
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4192 | mejdrech | 195 | int index; |
3846 | mejdrech | 196 | |
3991 | mejdrech | 197 | rwlock_write_lock( & arp_globals.lock ); |
3846 | mejdrech | 198 | // an existing device? |
199 | device = arp_cache_find( & arp_globals.cache, device_id ); |
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200 | if( device ){ |
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3991 | mejdrech | 201 | if( device->service != service ){ |
4163 | mejdrech | 202 | printf( "\nDevice %d already exists", device->device_id ); |
3991 | mejdrech | 203 | rwlock_write_unlock( & arp_globals.lock ); |
204 | return EEXIST; |
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205 | } |
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3846 | mejdrech | 206 | proto = arp_protos_find( & device->protos, protocol ); |
207 | if( proto ){ |
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208 | free( proto->addr ); |
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209 | free( proto->addr_data ); |
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210 | proto->addr = address; |
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211 | proto->addr_data = address->value; |
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212 | }else{ |
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3991 | mejdrech | 213 | if( ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){ |
214 | rwlock_write_unlock( & arp_globals.lock ); |
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215 | return ERROR_CODE; |
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216 | } |
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4192 | mejdrech | 217 | index = arp_protos_add( & device->protos, proto->service, proto ); |
218 | if( index < 0 ){ |
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3991 | mejdrech | 219 | rwlock_write_unlock( & arp_globals.lock ); |
3846 | mejdrech | 220 | free( proto ); |
4192 | mejdrech | 221 | return result; |
3846 | mejdrech | 222 | } |
223 | } |
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4163 | mejdrech | 224 | printf( "\nCache of the existing device %d cleaned", device->device_id ); |
3846 | mejdrech | 225 | }else{ |
4192 | mejdrech | 226 | index = protocol_map( service, protocol ); |
227 | if( ! index ) return ENOENT; |
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3846 | mejdrech | 228 | // create a new device |
229 | device = ( arp_device_ref ) malloc( sizeof( arp_device_t )); |
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3991 | mejdrech | 230 | if( ! device ){ |
231 | rwlock_write_unlock( & arp_globals.lock ); |
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232 | return ENOMEM; |
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233 | } |
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4192 | mejdrech | 234 | device->hardware = index; |
3846 | mejdrech | 235 | device->device_id = device_id; |
3912 | mejdrech | 236 | if( ERROR_OCCURRED( arp_protos_initialize( & device->protos )) |
237 | || ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){ |
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3991 | mejdrech | 238 | rwlock_write_unlock( & arp_globals.lock ); |
3846 | mejdrech | 239 | free( device ); |
240 | return ERROR_CODE; |
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241 | } |
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4192 | mejdrech | 242 | index = arp_protos_add( & device->protos, proto->service, proto ); |
243 | if( index < 0 ){ |
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3991 | mejdrech | 244 | rwlock_write_unlock( & arp_globals.lock ); |
3846 | mejdrech | 245 | arp_protos_destroy( & device->protos ); |
246 | free( device ); |
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4192 | mejdrech | 247 | return index; |
3846 | mejdrech | 248 | } |
249 | device->service = service; |
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250 | // bind the new one |
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251 | device->phone = bind_service( device->service, device->device_id, SERVICE_ARP, 0, arp_receiver ); |
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4192 | mejdrech | 252 | if( device->phone < 0 ){ |
253 | rwlock_write_unlock( & arp_globals.lock ); |
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254 | arp_protos_destroy( & device->protos ); |
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255 | free( device ); |
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256 | return EREFUSED; |
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257 | } |
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3846 | mejdrech | 258 | // get packet dimensions |
3912 | mejdrech | 259 | if( ERROR_OCCURRED( async_req_1_4( device->phone, NET_NIL_PACKET_SPACE, device_id, & device->addr_len, & device->prefix, & device->content, & device->suffix ))){ |
3991 | mejdrech | 260 | rwlock_write_unlock( & arp_globals.lock ); |
3846 | mejdrech | 261 | arp_protos_destroy( & device->protos ); |
262 | free( device ); |
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263 | return ERROR_CODE; |
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264 | } |
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265 | // get hardware address |
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266 | message = async_send_1( device->phone, NET_NIL_ADDR, device->device_id, & answer ); |
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3912 | mejdrech | 267 | if( ERROR_OCCURRED( measured_strings_return( device->phone, & device->addr, & device->addr_data, 1 ))){ |
3991 | mejdrech | 268 | rwlock_write_unlock( & arp_globals.lock ); |
3846 | mejdrech | 269 | arp_protos_destroy( & device->protos ); |
270 | free( device ); |
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271 | async_wait_for( message, NULL ); |
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272 | return ERROR_CODE; |
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273 | } |
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274 | async_wait_for( message, & result ); |
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3912 | mejdrech | 275 | if( ERROR_OCCURRED( result )){ |
3991 | mejdrech | 276 | rwlock_write_unlock( & arp_globals.lock ); |
3846 | mejdrech | 277 | free( device->addr ); |
278 | free( device->addr_data ); |
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279 | arp_protos_destroy( & device->protos ); |
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280 | free( device ); |
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281 | return ERROR_CODE; |
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282 | } |
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283 | // get broadcast address |
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284 | message = async_send_1( device->phone, NET_NIL_BROADCAST_ADDR, device->device_id, & answer ); |
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3912 | mejdrech | 285 | if( ERROR_OCCURRED( measured_strings_return( device->phone, & device->broadcast_addr, & device->broadcast_data, 1 ))){ |
3991 | mejdrech | 286 | rwlock_write_unlock( & arp_globals.lock ); |
3846 | mejdrech | 287 | free( device->addr ); |
288 | free( device->addr_data ); |
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289 | arp_protos_destroy( & device->protos ); |
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290 | free( device ); |
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291 | async_wait_for( message, NULL ); |
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292 | return ERROR_CODE; |
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293 | } |
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294 | async_wait_for( message, & result ); |
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295 | // add to the cache |
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3912 | mejdrech | 296 | if( ERROR_OCCURRED( result ) |
297 | || ERROR_OCCURRED( arp_cache_add( & arp_globals.cache, device->device_id, device ))){ |
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3991 | mejdrech | 298 | rwlock_write_unlock( & arp_globals.lock ); |
3846 | mejdrech | 299 | free( device->addr ); |
300 | free( device->addr_data ); |
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301 | free( device->broadcast_addr ); |
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302 | free( device->broadcast_data ); |
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303 | arp_protos_destroy( & device->protos ); |
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304 | free( device ); |
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305 | return ERROR_CODE; |
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306 | } |
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4192 | mejdrech | 307 | printf( "\nNew device registered:\n\tid\t= %d\n\ttype\t= 0x%x\n\tservice\t= %d", device->device_id, device->hardware, device->service ); |
3846 | mejdrech | 308 | } |
3991 | mejdrech | 309 | rwlock_write_unlock( & arp_globals.lock ); |
3846 | mejdrech | 310 | return EOK; |
311 | } |
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312 | |||
313 | measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target ){ |
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314 | arp_device_ref device; |
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315 | arp_proto_ref proto; |
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316 | measured_string_ref addr; |
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317 | size_t length; |
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318 | packet_t packet; |
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319 | arp_header_ref header; |
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320 | |||
321 | if( ! target ) return NULL; |
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3991 | mejdrech | 322 | rwlock_read_lock( & arp_globals.lock ); |
3846 | mejdrech | 323 | device = arp_cache_find( & arp_globals.cache, device_id ); |
3991 | mejdrech | 324 | if( ! device ){ |
325 | rwlock_read_unlock( & arp_globals.lock ); |
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326 | return NULL; |
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327 | } |
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3846 | mejdrech | 328 | proto = arp_protos_find( & device->protos, protocol ); |
3991 | mejdrech | 329 | if(( ! proto ) || ( proto->addr->length != target->length )){ |
330 | rwlock_read_unlock( & arp_globals.lock ); |
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331 | return NULL; |
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332 | } |
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3846 | mejdrech | 333 | addr = arp_addr_find( & proto->addresses, target->value, target->length ); |
3991 | mejdrech | 334 | if( addr ){ |
335 | rwlock_read_unlock( & arp_globals.lock ); |
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336 | return addr; |
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337 | } |
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3846 | mejdrech | 338 | // ARP packet content size = header + ( address + translation ) * 2 |
339 | length = 8 + ( CONVERT_SIZE( char, uint8_t, proto->addr->length ) + CONVERT_SIZE( char, uint8_t, device->addr->length )) * 2; |
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340 | if( length > device->content ){ |
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3991 | mejdrech | 341 | rwlock_read_unlock( & arp_globals.lock ); |
3846 | mejdrech | 342 | return NULL; |
343 | } |
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3991 | mejdrech | 344 | packet = packet_get_4( arp_globals.networking_phone, device->addr_len, device->prefix, length, device->suffix ); |
345 | if( ! packet ){ |
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346 | rwlock_read_unlock( & arp_globals.lock ); |
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347 | return NULL; |
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348 | } |
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3912 | mejdrech | 349 | header = ( arp_header_ref ) packet_suffix( packet, length ); |
3846 | mejdrech | 350 | header->hardware = device->hardware; |
351 | header->hardware_length = device->addr->length; |
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352 | header->protocol = protocol_map( device->service, protocol ); |
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353 | header->protocol_length = proto->addr->length; |
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354 | header->operation = ARPOP_REQUEST; |
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355 | length = sizeof( arp_header_t ); |
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356 | memcpy((( uint8_t * ) header ) + length, device->addr->value, device->addr->length ); |
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357 | length += device->addr->length; |
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358 | memcpy((( uint8_t * ) header ) + length, proto->addr->value, proto->addr->length ); |
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359 | length += proto->addr->length; |
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4192 | mejdrech | 360 | bzero((( uint8_t * ) header ) + length, device->addr->length ); |
3846 | mejdrech | 361 | length += device->addr->length; |
362 | memcpy((( uint8_t * ) header ) + length, target->value, target->length ); |
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3912 | mejdrech | 363 | packet_set_addr( packet, ( uint8_t * ) device->addr->value, ( uint8_t * ) device->broadcast_addr->value, CONVERT_SIZE( char, uint8_t, device->addr->length )); |
3901 | mejdrech | 364 | async_msg_3( device->phone, NET_NETIF_SEND, device_id, SERVICE_ARP, packet_get_id( packet )); |
3991 | mejdrech | 365 | rwlock_read_unlock( & arp_globals.lock ); |
3846 | mejdrech | 366 | return NULL; |
367 | } |
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368 | |||
369 | int arp_receive_message( device_id_t device_id, packet_t packet ){ |
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370 | ERROR_DECLARE; |
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371 | |||
372 | size_t length; |
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373 | arp_header_ref header; |
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374 | arp_device_ref device; |
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375 | arp_proto_ref proto; |
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376 | measured_string_ref hw_source; |
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3991 | mejdrech | 377 | uint8_t * src_hw; |
3912 | mejdrech | 378 | uint8_t * src_proto; |
379 | uint8_t * des_hw; |
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380 | uint8_t * des_proto; |
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3846 | mejdrech | 381 | |
382 | length = packet_get_data_length( packet ); |
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383 | if( length <= sizeof( arp_header_t )) return EINVAL; |
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3991 | mejdrech | 384 | rwlock_read_lock( & arp_globals.lock ); |
3846 | mejdrech | 385 | device = arp_cache_find( & arp_globals.cache, device_id ); |
3991 | mejdrech | 386 | if( ! device ){ |
387 | rwlock_read_unlock( & arp_globals.lock ); |
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388 | return ENOENT; |
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389 | } |
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3846 | mejdrech | 390 | header = ( arp_header_ref ) packet_get_data( packet ); |
3991 | mejdrech | 391 | if(( header->hardware != device->hardware ) |
392 | || ( length < sizeof( arp_header_t ) + ( header->hardware_length + header->protocol_length ) * 2 )){ |
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393 | rwlock_read_unlock( & arp_globals.lock ); |
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394 | return EINVAL; |
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395 | } |
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3846 | mejdrech | 396 | proto = arp_protos_find( & device->protos, protocol_unmap( device->service, header->protocol )); |
3991 | mejdrech | 397 | if( ! proto ){ |
398 | rwlock_read_unlock( & arp_globals.lock ); |
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399 | return ENOENT; |
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400 | } |
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3912 | mejdrech | 401 | src_hw = (( uint8_t * ) header ) + sizeof( arp_header_t ); |
3846 | mejdrech | 402 | src_proto = src_hw + header->hardware_length; |
403 | des_hw = src_proto + header->protocol_length; |
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404 | des_proto = des_hw + header->hardware_length; |
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3912 | mejdrech | 405 | hw_source = arp_addr_find( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length )); |
3846 | mejdrech | 406 | // exists? |
407 | if( hw_source ){ |
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3991 | mejdrech | 408 | if( hw_source->length != CONVERT_SIZE( uint8_t, char, header->hardware_length )){ |
409 | rwlock_read_unlock( & arp_globals.lock ); |
||
410 | return EINVAL; |
||
411 | } |
||
3912 | mejdrech | 412 | memcpy( hw_source->value, src_hw, hw_source->length ); |
3846 | mejdrech | 413 | } |
414 | // is my protocol address? |
||
3991 | mejdrech | 415 | if( proto->addr->length != CONVERT_SIZE( uint8_t, char, header->hardware_length )){ |
416 | rwlock_read_unlock( & arp_globals.lock ); |
||
417 | return EINVAL; |
||
3846 | mejdrech | 418 | } |
3912 | mejdrech | 419 | if( ! strncmp( proto->addr->value, ( char * ) des_proto, proto->addr->length )){ |
3846 | mejdrech | 420 | // not already upadted? |
421 | if( ! hw_source ){ |
||
3912 | mejdrech | 422 | hw_source = measured_string_create_bulk(( char * ) src_hw, CONVERT_SIZE( uint8_t, char, header->hardware_length )); |
3991 | mejdrech | 423 | if( ! hw_source ){ |
424 | rwlock_read_unlock( & arp_globals.lock ); |
||
425 | return ENOMEM; |
||
426 | } |
||
427 | if( ERROR_OCCURRED( arp_addr_add( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ), hw_source ))){ |
||
428 | rwlock_read_unlock( & arp_globals.lock ); |
||
429 | return ERROR_CODE; |
||
430 | } |
||
3846 | mejdrech | 431 | } |
432 | if( header->operation == ARPOP_REQUEST ){ |
||
433 | header->operation = ARPOP_REPLY; |
||
3991 | mejdrech | 434 | memcpy( des_proto, src_proto, header->protocol_length ); |
3846 | mejdrech | 435 | memcpy( src_proto, proto->addr->value, header->protocol_length ); |
436 | memcpy( src_hw, des_hw, header->hardware_length ); |
||
3912 | mejdrech | 437 | memcpy( des_hw, hw_source->value, header->hardware_length ); |
438 | packet_set_addr( packet, src_hw, des_hw, header->hardware_length ); |
||
3901 | mejdrech | 439 | async_msg_3( device->phone, NET_NETIF_SEND, device_id, SERVICE_ARP, packet_get_id( packet )); |
3991 | mejdrech | 440 | rwlock_read_unlock( & arp_globals.lock ); |
3901 | mejdrech | 441 | }else{ |
3991 | mejdrech | 442 | rwlock_read_unlock( & arp_globals.lock ); |
4192 | mejdrech | 443 | pq_release( arp_globals.networking_phone, packet_get_id( packet )); |
3846 | mejdrech | 444 | } |
445 | } |
||
446 | return EOK; |
||
447 | } |
||
448 | |||
449 | int arp_clear_device_message( device_id_t device_id ){ |
||
450 | arp_device_ref device; |
||
451 | |||
3991 | mejdrech | 452 | rwlock_write_lock( & arp_globals.lock ); |
3846 | mejdrech | 453 | device = arp_cache_find( & arp_globals.cache, device_id ); |
3991 | mejdrech | 454 | if( ! device ){ |
455 | rwlock_write_unlock( & arp_globals.lock ); |
||
456 | return ENOENT; |
||
457 | } |
||
3846 | mejdrech | 458 | clear_device( device ); |
4163 | mejdrech | 459 | printf( "\nDevice %d cleared", device_id ); |
3991 | mejdrech | 460 | rwlock_write_unlock( & arp_globals.lock ); |
3846 | mejdrech | 461 | return EOK; |
462 | } |
||
463 | |||
464 | void clear_device( arp_device_ref device ){ |
||
465 | int count; |
||
466 | arp_proto_ref proto; |
||
467 | |||
4192 | mejdrech | 468 | for( count = arp_protos_count( & device->protos ) - 1; count >= 0; -- count ){ |
3846 | mejdrech | 469 | proto = arp_protos_get_index( & device->protos, count ); |
4192 | mejdrech | 470 | if( proto ){ |
471 | if( proto->addr ) free( proto->addr ); |
||
472 | if( proto->addr_data ) free( proto->addr_data ); |
||
473 | arp_addr_destroy( & proto->addresses ); |
||
474 | } |
||
3846 | mejdrech | 475 | } |
476 | arp_protos_clear( & device->protos ); |
||
477 | } |
||
478 | |||
479 | int arp_clean_cache_message( void ){ |
||
480 | int count; |
||
481 | arp_device_ref device; |
||
482 | |||
3991 | mejdrech | 483 | rwlock_write_lock( & arp_globals.lock ); |
4192 | mejdrech | 484 | for( count = arp_cache_count( & arp_globals.cache ) - 1; count >= 0; -- count ){ |
3846 | mejdrech | 485 | device = arp_cache_get_index( & arp_globals.cache, count ); |
486 | if( device ){ |
||
487 | clear_device( device ); |
||
3912 | mejdrech | 488 | if( device->addr_data ) free( device->addr_data ); |
3846 | mejdrech | 489 | if( device->broadcast_data ) free( device->broadcast_data ); |
490 | } |
||
491 | } |
||
492 | arp_cache_clear( & arp_globals.cache ); |
||
4163 | mejdrech | 493 | rwlock_write_unlock( & arp_globals.lock ); |
494 | printf( "\nCache cleaned" ); |
||
3846 | mejdrech | 495 | return EOK; |
496 | } |
||
497 | |||
498 | int arp_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){ |
||
499 | ERROR_DECLARE; |
||
500 | |||
501 | measured_string_ref address; |
||
502 | measured_string_ref translation; |
||
503 | char * data; |
||
504 | |||
505 | * answer_count = 0; |
||
506 | switch( IPC_GET_METHOD( * call )){ |
||
507 | case IPC_M_PHONE_HUNGUP: |
||
508 | return EOK; |
||
509 | case NET_ARP_DEVICE: |
||
510 | ERROR_PROPAGATE( measured_strings_receive( & address, & data, 1 )); |
||
3912 | mejdrech | 511 | if( ERROR_OCCURRED( arp_device_message( IPC_GET_DEVICE( call ), IPC_GET_SERVICE( call ), IPC_GET_PROTO( call ), address ))){ |
3846 | mejdrech | 512 | free( address ); |
513 | free( data ); |
||
514 | } |
||
515 | return ERROR_CODE; |
||
516 | case NET_ARP_TRANSLATE: |
||
517 | ERROR_PROPAGATE( measured_strings_receive( & address, & data, 1 )); |
||
518 | translation = arp_translate_message( IPC_GET_DEVICE( call ), IPC_GET_PROTO( call ), address ); |
||
519 | free( address ); |
||
520 | free( data ); |
||
521 | if( ! translation ) return ENOENT; |
||
522 | return measured_strings_reply( translation, 1 ); |
||
523 | case NET_ARP_CLEAR_DEVICE: |
||
524 | return arp_clear_device_message( IPC_GET_DEVICE( call )); |
||
525 | case NET_ARP_CLEAN_CACHE: |
||
526 | return arp_clean_cache_message(); |
||
527 | } |
||
528 | return ENOTSUP; |
||
529 | } |
||
530 | |||
531 | void arp_receiver( ipc_callid_t iid, ipc_call_t * icall ){ |
||
532 | ERROR_DECLARE; |
||
533 | |||
534 | packet_t packet; |
||
535 | |||
536 | while( true ){ |
||
3912 | mejdrech | 537 | switch( IPC_GET_METHOD( * icall )){ |
3846 | mejdrech | 538 | case NET_IL_DEVICE_STATE: |
3991 | mejdrech | 539 | // do nothing - keep the cache |
540 | ipc_answer_0( iid, EOK ); |
||
3846 | mejdrech | 541 | break; |
542 | case NET_IL_RECEIVED: |
||
3912 | mejdrech | 543 | if( ! ERROR_OCCURRED( packet_translate( arp_globals.networking_phone, & packet, IPC_GET_PACKET( icall )))){ |
544 | ERROR_CODE = arp_receive_message( IPC_GET_DEVICE( icall ), packet ); |
||
3846 | mejdrech | 545 | } |
3912 | mejdrech | 546 | ipc_answer_0( iid, ERROR_CODE ); |
3846 | mejdrech | 547 | break; |
548 | default: |
||
3912 | mejdrech | 549 | ipc_answer_0( iid, ENOTSUP ); |
3846 | mejdrech | 550 | } |
3912 | mejdrech | 551 | iid = async_get_call( icall ); |
3846 | mejdrech | 552 | } |
553 | } |
||
554 | |||
555 | /** @} |
||
556 | */ |