1 | /** @file wlan_exp_node_ap.c |
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2 | * @brief Access Point WLAN Experiment |
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3 | * |
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4 | * This contains code for the 802.11 Access Point's WLAN experiment interface. |
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5 | * |
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6 | * @copyright Copyright 2013-2019, Mango Communications. All rights reserved. |
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7 | * Distributed under the Mango Communications Reference Design License |
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8 | * See LICENSE.txt included in the design archive or |
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9 | * at http://mangocomm.com/802.11/license |
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10 | * |
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11 | * This file is part of the Mango 802.11 Reference Design (https://mangocomm.com/802.11) |
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12 | */ |
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13 | |
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14 | /***************************** Include Files *********************************/ |
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15 | |
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16 | #include "wlan_mac_high_sw_config.h" |
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17 | |
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18 | #if WLAN_SW_CONFIG_ENABLE_WLAN_EXP |
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19 | |
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20 | #include "wlan_platform_common.h" |
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21 | #include "wlan_platform_high.h" |
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22 | |
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23 | #include "wlan_exp_node.h" |
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24 | #include "wlan_exp_node_ap.h" |
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25 | |
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26 | #include "wlan_mac_common.h" |
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27 | #include "wlan_mac_entries.h" |
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28 | #include "wlan_mac_ltg.h" |
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29 | #include "wlan_mac_addr_filter.h" |
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30 | #include "wlan_mac_event_log.h" |
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31 | #include "wlan_mac_high.h" |
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32 | #include "wlan_mac_ap.h" |
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33 | #include "wlan_mac_network_info.h" |
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34 | #include "wlan_mac_station_info.h" |
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35 | #include "wlan_mac_queue.h" |
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36 | |
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37 | #include "xil_io.h" |
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38 | |
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39 | |
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40 | // Check that there is enough memory to support MAX_NUM_ASSOC |
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41 | CASSERT( (MAX_NUM_ASSOC ) <= STATION_INFO_DL_ENTRY_MEM_NUM, insufficient_WLAN_OPTIONS_AUX_SIZE_KB_STATION_INFO_for_max_associations ) |
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42 | |
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43 | /*************************** Constant Definitions ****************************/ |
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44 | |
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45 | |
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46 | /*********************** Global Variable Definitions *************************/ |
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47 | |
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48 | extern network_info_t* active_network_info; |
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49 | |
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50 | extern function_ptr_t wlan_exp_purge_all_wireless_tx_queue_callback; |
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51 | extern u8 gl_dtim_mcast_buffer_enable; |
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52 | |
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53 | extern u32 max_queue_size; |
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54 | |
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55 | |
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56 | /*************************** Variable Definitions ****************************/ |
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57 | |
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58 | |
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59 | /*************************** Functions Prototypes ****************************/ |
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60 | |
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61 | |
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62 | /******************************** Functions **********************************/ |
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63 | |
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64 | |
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65 | /*****************************************************************************/ |
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66 | /** |
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67 | * Process Node Commands |
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68 | * |
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69 | * This function is part of the Ethernet processing system and will process the |
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70 | * various node related commands. |
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71 | * |
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72 | * @return int - Status of the command: |
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73 | * NO_RESP_SENT - No response has been sent |
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74 | * RESP_SENT - A response has been sent |
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75 | * |
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76 | * @note See on-line documentation for more information about the Ethernet |
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77 | * packet structure: www.warpproject.org |
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78 | * |
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79 | *****************************************************************************/ |
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80 | |
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81 | int process_wlan_exp_app_cmd(cmd_resp_hdr_t* cmd_hdr, eth_tx_queue_buffer_t* eth_tx_queue_buffer) { |
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82 | |
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83 | // |
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84 | // IMPORTANT ENDIAN NOTES: |
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85 | // - command |
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86 | // - header - Already endian swapped by the framework (safe to access directly) |
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87 | // - args - Must be endian swapped as necessary by code (framework does not know the contents of the command) |
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88 | // - response |
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89 | // - header - Will be endian swapped by the framework (safe to write directly) |
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90 | // - args - Must be endian swapped as necessary by code (framework does not know the contents of the response) |
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91 | // |
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92 | |
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93 | // Standard variables |
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94 | u32 resp_sent = NO_RESP_SENT; |
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95 | |
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96 | u32 cmd_id = CMD_TO_CMDID(cmd_hdr->cmd); |
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97 | |
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98 | // Segment 0 length includes a fully formed command response header |
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99 | // because one was created with default values suitable for a responseless |
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100 | // acknowledgment. |
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101 | cmd_resp_hdr_t* resp_hdr = (cmd_resp_hdr_t*)(eth_tx_queue_buffer->seg0 |
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102 | + eth_tx_queue_buffer->seg0_len |
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103 | - sizeof(cmd_resp_hdr_t)); |
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104 | |
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105 | u32* cmd_args_32 = (u32*)((u8*)cmd_hdr + sizeof(cmd_resp_hdr_t)); |
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106 | |
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107 | // |
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108 | // NOTE: Response header cmd, length, and num_args fields have already been initialized. |
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109 | // |
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110 | |
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111 | switch(cmd_id){ |
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112 | |
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113 | //----------------------------------------------------------------------------- |
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114 | // WLAN Exp Node Commands that must be implemented in child classes |
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115 | //----------------------------------------------------------------------------- |
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116 | |
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117 | //--------------------------------------------------------------------- |
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118 | case CMDID_NODE_RESET_STATE: { |
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119 | // NODE_RESET_STATE Packet Format: |
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120 | // - cmd_args_32[0] - Flags |
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121 | // [0] - NODE_RESET_LOG |
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122 | // [1] - NODE_RESET_TXRX_COUNTS |
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123 | // [2] - NODE_RESET_LTG |
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124 | // [3] - NODE_RESET_TX_DATA_QUEUE |
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125 | // [4] - NODE_RESET_ASSOCIATIONS |
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126 | // [5] - NODE_RESET_BSS_INFO |
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127 | // |
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128 | interrupt_state_t prev_interrupt_state; |
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129 | u32 status = CMD_PARAM_SUCCESS; |
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130 | u32 flags = Xil_Ntohl(cmd_args_32[0]); |
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131 | |
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132 | // Disable interrupts so no packets interrupt the reset |
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133 | prev_interrupt_state = wlan_platform_intc_stop(); |
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134 | |
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135 | #if WLAN_SW_CONFIG_ENABLE_LOGGING |
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136 | // Configure the LOG based on the flag bits |
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137 | if (flags & CMD_PARAM_NODE_RESET_FLAG_LOG) { |
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138 | wlan_exp_printf(WLAN_EXP_PRINT_INFO, print_type_event_log, "Reset log\n"); |
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139 | event_log_reset(); |
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140 | } |
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141 | #endif //WLAN_SW_CONFIG_ENABLE_LOGGING |
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142 | |
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143 | if (flags & CMD_PARAM_NODE_RESET_FLAG_TXRX_COUNTS) { |
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144 | wlan_exp_printf(WLAN_EXP_PRINT_INFO, print_type_counts, "Reseting Counts\n"); |
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145 | #if WLAN_SW_CONFIG_ENABLE_TXRX_COUNTS |
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146 | txrx_counts_zero_all(); |
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147 | #endif //WLAN_SW_CONFIG_ENABLE_TXRX_COUNTS |
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148 | } |
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149 | |
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150 | #if WLAN_SW_CONFIG_ENABLE_LTG |
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151 | if (flags & CMD_PARAM_NODE_RESET_FLAG_LTG) { |
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152 | status = ltg_sched_remove(LTG_REMOVE_ALL); |
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153 | |
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154 | if (status != 0) { |
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155 | wlan_exp_printf(WLAN_EXP_PRINT_ERROR, print_type_ltg, "Failed to remove all LTGs\n"); |
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156 | status = CMD_PARAM_ERROR + CMD_PARAM_LTG_ERROR; |
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157 | } else { |
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158 | wlan_exp_printf(WLAN_EXP_PRINT_INFO, print_type_ltg, "Removing All LTGs\n"); |
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159 | } |
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160 | } |
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161 | #endif //WLAN_SW_CONFIG_ENABLE_LTG |
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162 | |
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163 | if (flags & CMD_PARAM_NODE_RESET_FLAG_TX_DATA_QUEUE) { |
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164 | wlan_exp_printf(WLAN_EXP_PRINT_INFO, print_type_queue, "Purging all data transmit queues\n"); |
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165 | wlan_exp_purge_all_wireless_tx_queue_callback(); |
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166 | } |
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167 | |
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168 | if (flags & CMD_PARAM_NODE_RESET_FLAG_BSS) { |
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169 | wlan_exp_printf(WLAN_EXP_PRINT_INFO, print_type_node, "Resetting BSS \n"); |
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170 | |
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171 | // Note: Interrupts are currently disabled |
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172 | |
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173 | // Deauthenticate all stations |
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174 | // - This will send deauthentication packets to each Station |
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175 | deauthenticate_all_stations(); |
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176 | |
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177 | // Set "active_bss_info" to NULL |
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178 | configure_bss(NULL,0); |
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179 | } |
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180 | |
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181 | if (flags & CMD_PARAM_NODE_RESET_FLAG_NETWORK_LIST) { |
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182 | wlan_exp_printf(WLAN_EXP_PRINT_INFO, print_type_node, "Resetting Network List\n"); |
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183 | wlan_mac_high_reset_network_list(); |
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184 | } |
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185 | |
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186 | // Call MAC specific reset with the flags |
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187 | |
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188 | // Re-enable interrupts |
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189 | wlan_platform_intc_set_state(prev_interrupt_state); |
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190 | |
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191 | // Send response of success |
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192 | wlan_exp_add_u32_resp_arg(eth_tx_queue_buffer, resp_hdr, status); |
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193 | } |
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194 | break; |
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195 | |
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196 | |
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197 | //--------------------------------------------------------------------- |
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198 | case CMDID_NODE_DISASSOCIATE: { |
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199 | // Disassociate device from node |
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200 | // |
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201 | // Message format: |
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202 | // cmd_args_32[0:1] MAC Address (All 0xFF means all station info) |
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203 | // |
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204 | // Response format: |
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205 | // resp_args_32[0] Status |
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206 | // |
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207 | u8 mac_addr[MAC_ADDR_LEN]; |
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208 | station_info_entry_t* curr_entry; |
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209 | station_info_t* curr_station_info; |
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210 | interrupt_state_t prev_interrupt_state; |
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211 | u32 status = CMD_PARAM_SUCCESS; |
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212 | |
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213 | wlan_exp_printf(WLAN_EXP_PRINT_INFO, print_type_node, "Disassociate\n"); |
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214 | |
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215 | // Get MAC Address |
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216 | wlan_exp_get_mac_addr(&((u32 *)cmd_args_32)[0], &mac_addr[0]); |
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217 | |
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218 | |
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219 | // Depending on the mac_addr argument to this command, there are two actions that need to take place: |
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220 | // 1) If the mac_addr is all zeros (00-00-00-00-00-00), this is a magic number that indicates |
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221 | // that all currently-associated stations must be removed from the network |
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222 | // 2) If the mac_addr matches the MAC address of a currently associated station, it should be removed |
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223 | // from the network |
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224 | |
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225 | prev_interrupt_state = wlan_platform_intc_stop(); |
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226 | |
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227 | // This function is safe to call even if get_network_member_list() is NULL. |
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228 | // In that case, it will search through the flat list of station_info_t managed |
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229 | // by the High Framework. So, a non-NULL curr_entry does not necessarily mean |
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230 | // an associated station with this address has been found. For that to be the |
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231 | // case, both curr_entry and get_network_member_list() must be non-NULL. |
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232 | curr_entry = station_info_find_by_addr( mac_addr, get_network_member_list() ); |
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233 | |
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234 | if(wlan_addr_eq(mac_addr, zero_addr)){ |
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235 | // Remove all currently associated stations |
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236 | |
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237 | deauthenticate_all_stations(); |
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238 | |
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239 | wlan_exp_printf(WLAN_EXP_PRINT_INFO, print_type_node, "Disassociated node: "); |
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240 | wlan_exp_print_mac_address(WLAN_EXP_PRINT_INFO, &mac_addr[0]); wlan_exp_printf(WLAN_EXP_PRINT_INFO, NULL, "\n"); |
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241 | } else if(curr_entry && get_network_member_list()) { |
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242 | // There is currently an active network and we found this MAC address in the member list. |
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243 | // We will remove this |
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244 | curr_station_info = (curr_entry->data); |
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245 | |
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246 | deauthenticate_station(curr_station_info); |
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247 | |
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248 | // Set return parameters and print info to console |
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249 | wlan_exp_printf(WLAN_EXP_PRINT_INFO, print_type_node, "Disassociated node: "); |
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250 | wlan_exp_print_mac_address(WLAN_EXP_PRINT_INFO, &mac_addr[0]); wlan_exp_printf(WLAN_EXP_PRINT_INFO, NULL, "\n"); |
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251 | } else { |
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252 | // Either we have no active network or there is no node in the member list matching this MAC address |
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253 | wlan_exp_printf(WLAN_EXP_PRINT_INFO, print_type_node, "Could not find specified node: "); |
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254 | wlan_exp_print_mac_address(WLAN_EXP_PRINT_INFO, &mac_addr[0]); wlan_exp_printf(WLAN_EXP_PRINT_INFO, NULL, "\n"); |
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255 | |
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256 | status = CMD_PARAM_ERROR; |
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257 | } |
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258 | |
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259 | wlan_platform_intc_set_state(prev_interrupt_state); |
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260 | |
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261 | // Send response |
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262 | wlan_exp_add_u32_resp_arg(eth_tx_queue_buffer, resp_hdr, status); |
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263 | } |
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264 | break; |
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265 | |
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266 | |
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267 | //----------------------------------------------------------------------------- |
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268 | // AP Specific Commands |
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269 | //----------------------------------------------------------------------------- |
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270 | |
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271 | |
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272 | //--------------------------------------------------------------------- |
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273 | case CMDID_NODE_AP_CONFIG: { |
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274 | // Set AP configuration flags |
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275 | // |
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276 | // Message format: |
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277 | // cmd_args_32[0] Flags |
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278 | // [ 0] - NODE_AP_CONFIG_FLAG_DTIM_MULTICAST_BUFFERING |
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279 | // cmd_args_32[1] Mask for flags |
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280 | // |
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281 | // Response format: |
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282 | // resp_args_32[0] Status (CMD_PARAM_SUCCESS/CMD_PARAM_ERROR) |
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283 | // |
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284 | u32 status = CMD_PARAM_SUCCESS; |
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285 | u32 flags = Xil_Ntohl(cmd_args_32[0]); |
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286 | u32 mask = Xil_Ntohl(cmd_args_32[1]); |
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287 | |
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288 | wlan_exp_printf(WLAN_EXP_PRINT_INFO, print_type_node, "AP: Config flags = 0x%08x mask = 0x%08x\n", flags, mask); |
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289 | |
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290 | // Configure based on the flag bit / mask |
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291 | if (mask & CMD_PARAM_NODE_AP_CONFIG_FLAG_DTIM_MULTICAST_BUFFER) { |
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292 | if(flags & CMD_PARAM_NODE_AP_CONFIG_FLAG_DTIM_MULTICAST_BUFFER){ |
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293 | gl_dtim_mcast_buffer_enable = 1; |
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294 | wlan_mac_high_enable_mcast_buffering(gl_dtim_mcast_buffer_enable); |
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295 | } else { |
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296 | gl_dtim_mcast_buffer_enable = 0; |
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297 | wlan_mac_high_enable_mcast_buffering(gl_dtim_mcast_buffer_enable); |
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298 | } |
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299 | } |
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300 | |
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301 | // Send response of status |
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302 | wlan_exp_add_u32_resp_arg(eth_tx_queue_buffer, resp_hdr, status); |
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303 | } |
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304 | break; |
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305 | |
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306 | |
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307 | //--------------------------------------------------------------------- |
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308 | case CMDID_NODE_AP_SET_AUTHENTICATION_ADDR_FILTER: { |
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309 | // Allow / Disallow wireless authentications |
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310 | // |
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311 | // Message format: |
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312 | // cmd_args_32[0] Command: |
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313 | // - Write (CMD_PARAM_WRITE_VAL) |
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314 | // cmd_args_32[1] Number of address filters |
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315 | // cmd_args_32[2:N] [Compare address (u64), (Mask (u64)] |
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316 | // |
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317 | // Response format: |
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318 | // resp_args_32[0] Status |
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319 | // |
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320 | u32 i; |
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321 | u8 mac_addr[MAC_ADDR_LEN]; |
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322 | u8 mask[MAC_ADDR_LEN]; |
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323 | interrupt_state_t prev_interrupt_state; |
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324 | u32 status = CMD_PARAM_SUCCESS; |
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325 | u32 msg_cmd = Xil_Ntohl(cmd_args_32[0]); |
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326 | u32 num_ranges = Xil_Ntohl(cmd_args_32[1]); |
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327 | |
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328 | switch (msg_cmd) { |
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329 | case CMD_PARAM_WRITE_VAL: |
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330 | // Need to disable interrupts during this operation so the filter does not have any holes |
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331 | prev_interrupt_state = wlan_platform_intc_stop(); |
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332 | |
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333 | // Reset the current address filter |
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334 | wlan_mac_addr_filter_reset(); |
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335 | |
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336 | // Add all the address ranges to the filter |
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337 | for (i = 0; i < num_ranges; i++) { |
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338 | // Extract the address and the mask |
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339 | wlan_exp_get_mac_addr(&((u32 *)cmd_args_32)[2 + (4*i)], &mac_addr[0]); |
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340 | wlan_exp_get_mac_addr(&((u32 *)cmd_args_32)[4 + (4*i)], &mask[0]); |
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341 | |
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342 | wlan_exp_printf(WLAN_EXP_PRINT_INFO, print_type_node, "Adding Address filter: ("); |
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343 | wlan_exp_print_mac_address(WLAN_EXP_PRINT_INFO, mac_addr); wlan_exp_printf(WLAN_EXP_PRINT_INFO, NULL, ", "); |
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344 | wlan_exp_print_mac_address(WLAN_EXP_PRINT_INFO, mask); wlan_exp_printf(WLAN_EXP_PRINT_INFO, NULL, "\n"); |
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345 | |
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346 | if (wlan_mac_addr_filter_add(mask, mac_addr) == -1) { |
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347 | status = CMD_PARAM_ERROR; |
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348 | } |
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349 | } |
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350 | |
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351 | wlan_platform_intc_set_state(prev_interrupt_state); |
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352 | break; |
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353 | |
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354 | default: |
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355 | wlan_exp_printf(WLAN_EXP_PRINT_ERROR, print_type_node, "Unknown command for 0x%6x: %d\n", cmd_id, msg_cmd); |
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356 | status = CMD_PARAM_ERROR; |
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357 | break; |
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358 | } |
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359 | |
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360 | // Send response |
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361 | wlan_exp_add_u32_resp_arg(eth_tx_queue_buffer, resp_hdr, status); |
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362 | } |
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363 | break; |
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364 | |
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365 | |
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366 | //----------------------------------------------------------------------------- |
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367 | // Association Commands |
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368 | //----------------------------------------------------------------------------- |
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369 | |
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370 | |
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371 | //--------------------------------------------------------------------- |
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372 | case CMDID_NODE_ASSOCIATE: { |
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373 | // Associate with the device |
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374 | // |
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375 | // Message format: |
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376 | // cmd_args_32[0] Association flags |
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377 | // CMD_PARAM_AP_ASSOCIATE_FLAG_ALLOW_TIMEOUT |
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378 | // CMD_PARAM_AP_ASSOCIATE_FLAG_STATION_INFO_DO_NOT_REMOVE |
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379 | // cmd_args_32[1] Association flags mask |
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380 | // cmd_args_32[2:3] Association MAC Address |
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381 | // |
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382 | // Response format: |
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383 | // resp_args_32[0] Status |
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384 | // |
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385 | u32 flags; |
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386 | u32 mask; |
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387 | u8 mac_addr[MAC_ADDR_LEN]; |
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388 | interrupt_state_t prev_interrupt_state; |
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389 | u32 status = CMD_PARAM_SUCCESS; |
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390 | station_info_entry_t* station_info_entry = NULL; |
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391 | station_info_t* curr_station_info = NULL; |
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392 | u8 station_flags = 0; |
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393 | u16 station_capabilities = 0; |
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394 | u32 error_reason = 0; |
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395 | |
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396 | wlan_exp_printf(WLAN_EXP_PRINT_INFO, print_type_node, "AP: Associate\n"); |
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397 | |
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398 | // Get MAC Address |
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399 | wlan_exp_get_mac_addr(&((u32 *)cmd_args_32)[2], &mac_addr[0]); |
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400 | |
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401 | if(active_network_info != NULL){ |
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402 | station_info_entry = station_info_find_by_addr(mac_addr, &(active_network_info->members)); |
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403 | } |
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404 | |
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405 | if ((active_network_info != NULL) && ((station_info_entry != NULL) || (active_network_info->members.length < MAX_NUM_ASSOC)) ) { |
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406 | |
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407 | // Get flags |
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408 | flags = Xil_Ntohl(cmd_args_32[0]); |
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409 | mask = Xil_Ntohl(cmd_args_32[1]); |
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410 | |
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411 | wlan_exp_printf(WLAN_EXP_PRINT_INFO, print_type_node, "Associate flags = 0x%08x mask = 0x%08x\n", flags, mask); |
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412 | |
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413 | // Disable interrupts to avoid race conditions between wlan_exp and wireless Tx/Rx when |
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414 | // modifying the AP's association table |
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415 | prev_interrupt_state = wlan_platform_intc_stop(); |
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416 | |
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417 | // Add association |
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418 | curr_station_info = network_info_add_member(active_network_info, &mac_addr[0], max_queue_size); |
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419 | |
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420 | // Set return parameters and print info to console |
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421 | if (curr_station_info != NULL) { |
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422 | |
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423 | // Update the new station_info flags field |
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424 | // Only override the defaults set by the framework add_station_info if the wlan_exp command explicitly included a flag |
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425 | station_flags = curr_station_info->flags; |
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426 | |
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427 | // Raise the KEEP flag to prevent the MAC High Framework from removing the struct |
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428 | station_flags |= STATION_INFO_FLAG_KEEP; |
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429 | |
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430 | if (mask & CMD_PARAM_AP_ASSOCIATE_FLAG_DISABLE_INACTIVITY_TIMEOUT) { |
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431 | if (flags & CMD_PARAM_AP_ASSOCIATE_FLAG_DISABLE_INACTIVITY_TIMEOUT) { |
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432 | station_flags |= STATION_INFO_FLAG_DISABLE_ASSOC_CHECK; |
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433 | } else { |
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434 | station_flags &= ~STATION_INFO_FLAG_DISABLE_ASSOC_CHECK; |
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435 | } |
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436 | } |
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437 | |
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438 | if (mask & CMD_PARAM_AP_ASSOCIATE_FLAG_HT_CAPABLE_STA) { |
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439 | if (flags & CMD_PARAM_AP_ASSOCIATE_FLAG_HT_CAPABLE_STA) { |
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440 | station_capabilities |= STATION_INFO_CAPABILITIES_HT_CAPABLE; |
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441 | } else { |
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442 | station_capabilities &= ~STATION_INFO_CAPABILITIES_HT_CAPABLE; |
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443 | } |
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444 | } |
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445 | |
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446 | // Update the station_info flags |
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447 | curr_station_info->flags = station_flags; |
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448 | curr_station_info->capabilities = station_capabilities; |
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449 | |
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450 | // Re-enable interrupts |
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451 | wlan_platform_intc_set_state(prev_interrupt_state); |
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452 | |
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453 | |
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454 | // |
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455 | // TODO: (Optional) Log association state change |
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456 | // |
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457 | |
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458 | // Update the hex display |
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459 | wlan_platform_high_userio_disp_status(USERIO_DISP_STATUS_MEMBER_LIST_UPDATE, active_network_info->members.length); |
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460 | |
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461 | wlan_exp_printf(WLAN_EXP_PRINT_INFO, print_type_node, "Associated with node: "); |
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462 | } else { |
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463 | |
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464 | // Re-enable interrupts |
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465 | wlan_platform_intc_set_state(prev_interrupt_state); |
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466 | |
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467 | wlan_exp_printf(WLAN_EXP_PRINT_INFO, print_type_node, "Could not associate with node: "); |
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468 | status = CMD_PARAM_ERROR; |
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469 | error_reason |= NODE_ASSOCIATE_ERROR_MEMORY; |
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470 | |
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471 | } |
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472 | } else { |
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473 | wlan_exp_printf(WLAN_EXP_PRINT_INFO, print_type_node, "Could not associate with node: "); |
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474 | status = CMD_PARAM_ERROR; |
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475 | error_reason |= NODE_ASSOCIATE_ERROR_TOO_MANY_ASSOC; |
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476 | } |
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477 | |
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478 | wlan_exp_print_mac_address(WLAN_EXP_PRINT_INFO, &mac_addr[0]); wlan_exp_printf(WLAN_EXP_PRINT_INFO, NULL, "\n"); |
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479 | |
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480 | // Send response |
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481 | wlan_exp_add_u32_resp_arg(eth_tx_queue_buffer, resp_hdr, status); |
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482 | |
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483 | if (curr_station_info != NULL) { |
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484 | wlan_exp_add_u32_resp_arg(eth_tx_queue_buffer, resp_hdr, curr_station_info->ID); |
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485 | } else { |
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486 | wlan_exp_add_u32_resp_arg(eth_tx_queue_buffer, resp_hdr, error_reason); |
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487 | } |
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488 | } |
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489 | break; |
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490 | |
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491 | |
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492 | //--------------------------------------------------------------------- |
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493 | default: { |
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494 | wlan_exp_printf(WLAN_EXP_PRINT_ERROR, print_type_node, "Unknown node command: 0x%x\n", cmd_id); |
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495 | } |
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496 | break; |
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497 | } |
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498 | |
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499 | return resp_sent; |
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500 | } |
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501 | |
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502 | |
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503 | #endif |
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504 | |
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