1 | /** @file wlan_mac_ibss.c |
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2 | * @brief Station |
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3 | * |
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4 | * This contains code for the 802.11 IBSS node (ad hoc). |
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5 | * |
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6 | * @copyright Copyright 2014-2019, 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 | #include "wlan_mac_high_sw_config.h" |
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16 | |
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17 | // Xilinx SDK includes |
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18 | #include "stdio.h" |
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19 | #include "stdlib.h" |
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20 | #include "string.h" |
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21 | #include "xil_cache.h" |
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22 | |
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23 | // WLAN includes |
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24 | #include "wlan_platform_common.h" |
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25 | #include "wlan_platform_high.h" |
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26 | #include "wlan_mac_802_11_defs.h" |
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27 | #include "wlan_mac_queue.h" |
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28 | #include "wlan_mac_event_log.h" |
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29 | #include "wlan_mac_entries.h" |
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30 | #include "wlan_mac_ltg.h" |
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31 | #include "wlan_mac_high.h" |
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32 | #include "wlan_mac_packet_types.h" |
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33 | #include "wlan_mac_eth_util.h" |
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34 | #include "wlan_mac_scan.h" |
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35 | #include "ascii_characters.h" |
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36 | #include "wlan_mac_schedule.h" |
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37 | #include "wlan_mac_dl_list.h" |
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38 | #include "wlan_mac_network_info.h" |
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39 | #include "wlan_mac_station_info.h" |
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40 | #include "wlan_mac_ibss.h" |
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41 | #include "wlan_mac_mgmt_tags.h" |
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42 | #include "wlan_mac_common.h" |
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43 | #include "wlan_mac_pkt_buf_util.h" |
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44 | |
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45 | // WLAN Exp includes |
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46 | #include "wlan_exp.h" |
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47 | #include "wlan_exp_common.h" |
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48 | #include "wlan_exp_node.h" |
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49 | #include "wlan_exp_node_ibss.h" |
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50 | #include "wlan_exp_transport.h" |
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51 | #include "wlan_exp_user.h" |
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52 | |
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53 | |
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54 | /*************************** Constant Definitions ****************************/ |
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55 | #define WLAN_DEFAULT_BSS_CONFIG_CHANNEL 1 |
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56 | #define WLAN_DEFAULT_BSS_CONFIG_DTIM_PERIOD 2 |
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57 | #define WLAN_DEFAULT_BSS_CONFIG_BEACON_INTERVAL 100 |
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58 | // The WLAN_DEFAULT_BSS_CONFIG_HT_CAPABLE define will set the default |
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59 | // unicast TX phy mode to: 1 --> HTMF or 0 --> NONHT. |
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60 | #define WLAN_DEFAULT_BSS_CONFIG_HT_CAPABLE 1 |
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61 | |
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62 | #define WLAN_DEFAULT_TX_PWR 15 |
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63 | #define WLAN_DEFAULT_TX_ANTENNA TX_ANTMODE_SISO_ANTA |
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64 | #define WLAN_DEFAULT_RX_ANTENNA RX_ANTMODE_SISO_ANTA |
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65 | |
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66 | #define WLAN_DEFAULT_SCAN_TIMEOUT_USEC_MIN 4000000 |
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67 | #define WLAN_DEFAULT_SCAN_TIMEOUT_USEC_MAX 8000000 |
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68 | |
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69 | // WLAN_DEFAULT_USE_HT |
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70 | // |
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71 | // The WLAN_DEFAULT_USE_HT define will set the default unicast TX phy mode |
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72 | // to: 1 --> HTMF or 0 --> NONHT. It will also be used as the default |
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73 | // value for the HT_CAPABLE capability of the BSS in configure_bss() when |
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74 | // moving from a NULL to a non-NULL BSS and the ht_capable parameter is not |
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75 | // specified. This parameter only affects how the MAC selects the phy_mode |
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76 | // value for transmissions. It does not affect the underlying PHY support for |
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77 | // Tx/Rx of HTMF waveforms. |
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78 | #define WLAN_DEFAULT_USE_HT 1 |
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79 | |
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80 | |
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81 | /*********************** Global Variable Definitions *************************/ |
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82 | |
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83 | |
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84 | // Static QIDs |
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85 | u16 mcast_qid; |
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86 | u16 mgmt_qid; |
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87 | |
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88 | // If you want this station to try to associate to a known IBSS at boot, type |
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89 | // the string here. Otherwise, let it be an empty string. |
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90 | static char default_ssid[SSID_LEN_MAX + 1] = "MANGO-IBSS"; |
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91 | // static char default_ssid[SSID_LEN_MAX + 1] = ""; |
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92 | |
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93 | // Top level IBSS state |
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94 | network_info_t* active_network_info; |
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95 | |
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96 | // Tx queue variables; |
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97 | u32 max_queue_size; |
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98 | volatile u8 pause_data_queue; |
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99 | |
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100 | // MAC address |
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101 | static u8 wlan_mac_addr[MAC_ADDR_LEN]; |
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102 | |
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103 | // Beacon configuration |
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104 | static beacon_txrx_config_t gl_beacon_txrx_config; |
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105 | |
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106 | // Common Platform Device Info |
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107 | platform_common_dev_info_t platform_common_dev_info; |
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108 | |
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109 | |
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110 | /*************************** Functions Prototypes ****************************/ |
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111 | |
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112 | #if WLAN_SW_CONFIG_ENABLE_WLAN_EXP |
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113 | int wlan_exp_process_user_cmd(cmd_resp_hdr_t* cmd_hdr, eth_tx_queue_buffer_t* eth_tx_queue_buffer); |
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114 | #endif |
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115 | |
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116 | void send_probe_req(); |
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117 | void ibss_set_beacon_ts_update_mode(u32 enable); |
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118 | |
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119 | |
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120 | /******************************** Functions **********************************/ |
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121 | |
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122 | int main() { |
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123 | |
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124 | // Call the platform-supplied cpu_init() first to setup any |
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125 | // processor-specific settings to enable sane execution |
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126 | // of the platform and framework code below |
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127 | wlan_platform_cpu_high_init(); |
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128 | |
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129 | u64 scan_start_timestamp; |
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130 | u64 scan_duration; |
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131 | u8 locally_administered_addr[MAC_ADDR_LEN]; |
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132 | dl_list* ssid_match_list = NULL; |
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133 | dl_entry* temp_dl_entry = NULL; |
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134 | network_info_t* temp_network_info = NULL; |
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135 | bss_config_t bss_config; |
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136 | u32 update_mask; |
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137 | |
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138 | |
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139 | // Print initial message to UART |
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140 | xil_printf("\f"); |
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141 | xil_printf("----- Mango 802.11 Reference Design -----\n"); |
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142 | xil_printf("----- v1.8.0 ----------------------------\n"); |
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143 | xil_printf("----- wlan_mac_ibss ---------------------\n"); |
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144 | xil_printf("Compiled %s %s\n\n", __DATE__, __TIME__); |
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145 | |
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146 | wlan_mac_common_malloc_init(); |
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147 | |
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148 | // Initialize the maximum TX queue size |
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149 | max_queue_size = MAX_TX_QUEUE_LEN; |
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150 | |
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151 | // Unpause the queue |
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152 | pause_data_queue = 0; |
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153 | |
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154 | // Initialize beacon configuration |
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155 | gl_beacon_txrx_config.ts_update_mode = FUTURE_ONLY_UPDATE; |
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156 | bzero(gl_beacon_txrx_config.bssid_match, MAC_ADDR_LEN); |
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157 | gl_beacon_txrx_config.beacon_tx_mode = NO_BEACON_TX; |
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158 | |
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159 | // Initialize the utility library |
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160 | wlan_mac_high_init(); |
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161 | |
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162 | // Open static queues |
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163 | mcast_qid = queue_open((void*)wlan_null_callback, 0, max_queue_size); |
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164 | mgmt_qid = queue_open((void*)wlan_null_callback, 0, max_queue_size); |
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165 | |
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166 | // Get the device info |
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167 | platform_common_dev_info = wlan_platform_common_get_dev_info(); |
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168 | |
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169 | // IBSS is not currently a member of BSS |
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170 | configure_bss(NULL, 0); |
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171 | |
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172 | wlan_platform_high_userio_disp_status(USERIO_DISP_STATUS_APPLICATION_ROLE, APPLICATION_ROLE_IBSS); |
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173 | |
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174 | // Initialize hex display to "No BSS" |
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175 | wlan_platform_high_userio_disp_status(USERIO_DISP_STATUS_MEMBER_LIST_UPDATE, 0xFF); |
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176 | |
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177 | // Set default Tx params |
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178 | // Set sane default Tx params. These will be overwritten by the user application |
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179 | tx_params_t tx_params = { .phy = { .mcs = 3, .phy_mode = PHY_MODE_HTMF, .antenna_mode = WLAN_DEFAULT_TX_ANTENNA, .power = WLAN_DEFAULT_TX_PWR }, |
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180 | .mac = { .flags = 0 } }; |
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181 | |
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182 | wlan_mac_set_default_tx_params(unicast_data, &tx_params); |
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183 | |
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184 | tx_params.phy.mcs = 0; |
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185 | tx_params.phy.phy_mode = PHY_MODE_NONHT; |
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186 | |
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187 | wlan_mac_set_default_tx_params(unicast_mgmt, &tx_params); |
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188 | wlan_mac_set_default_tx_params(mcast_data, &tx_params); |
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189 | wlan_mac_set_default_tx_params(mcast_mgmt, &tx_params); |
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190 | |
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191 | // Re-apply the defaults to any existing station_info_t structs that this AP |
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192 | // knows about |
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193 | wlan_mac_reapply_default_tx_params(); |
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194 | |
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195 | // Initialize callbacks |
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196 | #if WLAN_SW_CONFIG_ENABLE_ETH_BRIDGE |
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197 | wlan_mac_util_set_eth_rx_callback((void*) ethernet_receive); |
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198 | #endif |
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199 | wlan_mac_high_set_mpdu_rx_callback((void*) mpdu_rx_process); |
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200 | wlan_mac_high_set_uart_rx_callback((void*) uart_rx); |
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201 | wlan_mac_high_set_poll_tx_queues_callback((void*) poll_tx_queues); |
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202 | |
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203 | #if WLAN_SW_CONFIG_ENABLE_LTG |
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204 | wlan_mac_ltg_sched_set_callback((void*) ltg_event); |
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205 | #endif //WLAN_SW_CONFIG_ENABLE_LTG |
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206 | wlan_mac_scan_set_tx_probe_request_callback((void*) send_probe_req); |
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207 | wlan_mac_scan_set_state_change_callback((void*) process_scan_state_change); |
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208 | wlan_mac_high_set_cpu_low_reboot_callback((void*) handle_cpu_low_reboot); |
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209 | |
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210 | #if WLAN_SW_CONFIG_ENABLE_WLAN_EXP |
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211 | |
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212 | // NOTE: To use the WLAN Experiments Framework, it must be initialized after |
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213 | // CPU low has populated the hw_info structure in the MAC High framework. |
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214 | |
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215 | // Initialize WLAN Exp |
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216 | wlan_exp_node_init(); |
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217 | |
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218 | // Set WLAN Exp callbacks |
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219 | wlan_exp_set_process_node_cmd_callback((void*) process_wlan_exp_app_cmd); |
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220 | wlan_exp_set_purge_all_wireless_tx_queue_callback((void*) purge_all_wireless_tx_queue); |
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221 | wlan_exp_set_process_user_cmd_callback((void*) wlan_exp_process_user_cmd); |
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222 | wlan_exp_set_beacon_ts_update_mode_callback((void*) ibss_set_beacon_ts_update_mode); |
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223 | wlan_exp_set_process_config_bss_callback((void*) configure_bss); |
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224 | wlan_exp_set_active_network_info_getter_callback((void*) active_network_info_getter); |
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225 | |
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226 | // Set CPU_HIGH Type in wlan_exp's node_info struct; |
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227 | wlan_exp_node_set_type_high(APPLICATION_ROLE_IBSS, __DATE__, __TIME__); |
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228 | #endif |
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229 | |
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230 | // CPU Low will pass HW information to CPU High as part of the boot process |
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231 | // - Get necessary HW information |
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232 | memcpy((void*) &(wlan_mac_addr[0]), (void*) get_mac_hw_addr_wlan(), MAC_ADDR_LEN); |
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233 | |
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234 | // Set the at-boot MAC Time to 0 usec |
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235 | set_mac_time_usec(0); |
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236 | |
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237 | wlan_mac_high_set_radio_channel(WLAN_DEFAULT_BSS_CONFIG_CHANNEL); |
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238 | wlan_mac_high_set_rx_ant_mode(WLAN_DEFAULT_RX_ANTENNA); |
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239 | wlan_mac_high_set_tx_ctrl_power(WLAN_DEFAULT_TX_PWR); |
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240 | wlan_mac_high_set_radio_tx_power(WLAN_DEFAULT_TX_PWR); |
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241 | |
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242 | #if WLAN_SW_CONFIG_ENABLE_LOGGING |
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243 | // Reset the event log |
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244 | event_log_reset(); |
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245 | #endif //WLAN_SW_CONFIG_ENABLE_LOGGING |
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246 | |
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247 | |
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248 | // Print Station information to the terminal |
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249 | xil_printf("------------------------\n"); |
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250 | xil_printf("WLAN MAC IBSS boot complete.\n"); |
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251 | |
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252 | #ifdef WLAN_USE_UART_MENU |
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253 | xil_printf("\nPress the Esc key in your terminal to access the UART menu\n"); |
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254 | #endif |
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255 | |
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256 | // Start the interrupts |
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257 | wlan_platform_intc_set_state(INTERRUPTS_ENABLED); |
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258 | |
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259 | // If there is a default SSID and the DIP switch allows it, start an active scan |
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260 | // - Uses default scan parameters |
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261 | if ((strlen(default_ssid) > 0) && ((wlan_platform_userio_get_state() & USERIO_INPUT_MASK_SW_3) == 0)) { |
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262 | |
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263 | // To prevent multiple IBSS nodes from scanning and then all creating the same network simply |
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264 | // because they were powered on at the same time, we randomize the amount of time spent scanning |
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265 | // for a network between [WLAN_DEFAULT_SCAN_TIMEOUT_USEC_MIN, WLAN_DEFAULT_SCAN_TIMEOUT_USEC_MAX] |
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266 | scan_duration = WLAN_DEFAULT_SCAN_TIMEOUT_USEC_MIN + |
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267 | (( (1000*(u64)rand()) / ((u64)RAND_MAX) ) * (WLAN_DEFAULT_SCAN_TIMEOUT_USEC_MAX - WLAN_DEFAULT_SCAN_TIMEOUT_USEC_MIN)) / 1000; |
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268 | |
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269 | scan_start_timestamp = get_system_time_usec(); |
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270 | |
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271 | wlan_mac_scan_start(); |
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272 | |
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273 | while (((get_system_time_usec() < (scan_start_timestamp + scan_duration))) && |
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274 | (temp_dl_entry == NULL)) { |
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275 | // Only try to find a match if the IBSS has completed at least one full scan |
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276 | if (wlan_mac_scan_get_num_scans() > 0) { |
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277 | ssid_match_list = wlan_mac_high_find_network_info_SSID(default_ssid); |
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278 | |
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279 | if (ssid_match_list->length > 0) { |
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280 | // Join the first entry in the list |
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281 | // - This could be modified in the future to use some other selection, |
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282 | // for example RX power. |
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283 | // |
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284 | temp_dl_entry = ssid_match_list->first; |
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285 | } |
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286 | } |
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287 | } |
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288 | |
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289 | wlan_mac_scan_stop(); |
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290 | |
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291 | // Set the BSSID / SSID / Channel based on whether the scan was successful |
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292 | if (temp_dl_entry != NULL) { |
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293 | // Found an existing network matching the default SSID. Adopt that network's BSS configuration |
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294 | xil_printf("Found existing %s network. Matching BSS settings.\n", default_ssid); |
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295 | temp_network_info = (network_info_t*)(temp_dl_entry->data); |
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296 | |
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297 | bss_config = temp_network_info->bss_config; |
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298 | } else { |
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299 | // Did not find an existing network matching the default SSID. Create default BSS configuration |
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300 | xil_printf("Unable to find '%s' IBSS. Creating new network.\n", default_ssid); |
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301 | |
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302 | // Use node's wlan_mac_addr as BSSID |
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303 | // - Raise the bit identifying this address as locally administered |
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304 | memcpy(locally_administered_addr, wlan_mac_addr, MAC_ADDR_LEN); |
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305 | locally_administered_addr[0] |= MAC_ADDR_MSB_MASK_LOCAL; |
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306 | |
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307 | memcpy(bss_config.bssid, locally_administered_addr, MAC_ADDR_LEN); |
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308 | strncpy(bss_config.ssid, default_ssid, SSID_LEN_MAX); |
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309 | |
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310 | bss_config.chan_spec.chan_pri = WLAN_DEFAULT_BSS_CONFIG_CHANNEL; |
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311 | bss_config.chan_spec.chan_type = CHAN_TYPE_BW20; |
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312 | bss_config.beacon_interval = WLAN_DEFAULT_BSS_CONFIG_BEACON_INTERVAL; |
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313 | bss_config.ht_capable = WLAN_DEFAULT_BSS_CONFIG_HT_CAPABLE; |
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314 | } |
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315 | |
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316 | // Set the rest of the bss_config fields |
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317 | update_mask = (BSS_FIELD_MASK_BSSID | |
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318 | BSS_FIELD_MASK_CHAN | |
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319 | BSS_FIELD_MASK_SSID | |
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320 | BSS_FIELD_MASK_BEACON_INTERVAL | |
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321 | BSS_FIELD_MASK_HT_CAPABLE); |
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322 | |
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323 | // Set the BSS configuration |
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324 | configure_bss(&bss_config, update_mask); |
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325 | } |
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326 | |
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327 | // Schedule Events |
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328 | wlan_mac_schedule_add_event(SCHEDULE_ID_COARSE, ASSOCIATION_CHECK_INTERVAL_US, SCHEDULE_REPEAT_FOREVER, (void*)remove_inactive_station_infos); |
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329 | |
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330 | |
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331 | while(1){ |
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332 | wlan_mac_poll(); |
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333 | } |
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334 | |
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335 | // Unreachable, but non-void return keeps the compiler happy |
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336 | return WLAN_FAILURE; |
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337 | } |
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338 | |
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339 | /*****************************************************************************/ |
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340 | /** |
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341 | * @brief Send probe requet |
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342 | * |
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343 | * This function is part of the scan infrastructure and will be called whenever |
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344 | * the node needs to send a probe request. |
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345 | * |
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346 | * @param None |
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347 | * @return None |
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348 | * |
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349 | *****************************************************************************/ |
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350 | void send_probe_req(){ |
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351 | u16 tx_length; |
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352 | dl_entry* tx_queue_entry; |
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353 | tx_80211_queue_buffer_t* tx_queue_buffer; |
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354 | volatile scan_parameters_t* scan_parameters = wlan_mac_scan_get_parameters(); |
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355 | |
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356 | // Check out queue element for packet |
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357 | tx_queue_entry = queue_checkout(); |
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358 | |
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359 | // Create probe request |
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360 | if(tx_queue_entry != NULL){ |
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361 | tx_queue_buffer = (tx_80211_queue_buffer_t*)(tx_queue_entry->data); |
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362 | |
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363 | tx_length = wlan_create_probe_req_frame(tx_queue_buffer->pkt, |
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364 | (u8*)bcast_addr, |
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365 | wlan_mac_addr, |
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366 | (u8*)bcast_addr, |
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367 | scan_parameters->ssid); |
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368 | // Fill in metadata |
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369 | tx_queue_buffer->flags = 0; |
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370 | tx_queue_buffer->length = tx_length; |
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371 | tx_queue_buffer->seg0_len = tx_length; |
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372 | tx_queue_buffer->seg1_len = 0; |
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373 | tx_queue_buffer->seg1_offset = 0; |
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374 | tx_queue_buffer->station_info = station_info_create((u8*)bcast_addr); |
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375 | |
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376 | // Put the packet in the queue |
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377 | wlan_mac_enqueue_wireless_tx(mgmt_qid, tx_queue_entry); |
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378 | |
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379 | // Poll the TX queues to possibly send the packet |
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380 | poll_tx_queues(PKT_BUF_GROUP_GENERAL); |
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381 | } |
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382 | } |
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383 | |
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384 | |
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385 | |
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386 | /*****************************************************************************/ |
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387 | /** |
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388 | * @brief Handle state change in the network scanner |
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389 | * |
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390 | * This function is part of the scan infrastructure and will be called whenever |
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391 | * the scanner is started, stopped, paused, or resumed. This allows the STA |
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392 | * to revert the channel to a known-good state when the scanner has stopped and |
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393 | * also serves as notification to the project that it should stop dequeueing data |
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394 | * frames since it might be on a different channel than its intended recipient. |
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395 | * |
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396 | * @param None |
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397 | * @return None |
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398 | * |
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399 | *****************************************************************************/ |
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400 | void process_scan_state_change(scan_state_t scan_state){ |
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401 | |
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402 | // ------------------------------------------------------------------------ |
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403 | // Note on scanning: |
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404 | // |
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405 | // Currently, scanning should only be done with active_bss_info = NULL, ie the |
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406 | // node is not currently in a BSS. This is to avoid any corner cases. The |
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407 | // IBSS needs to do the following things to make scanning safe when active_bss_info |
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408 | // is not NULL: |
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409 | // |
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410 | // - Pause outgoing data queues |
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411 | // - Pause beacon transmissions in CPU_LOW |
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412 | // - Refuse to enqueue probe responses when a probe request is received off channel |
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413 | // - Pause dequeue of probe responses when off channel |
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414 | // - Note: Currently, this is difficult because probe responses share a |
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415 | // queue with probe requests which are needed for active scans |
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416 | // |
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417 | // ------------------------------------------------------------------------ |
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418 | |
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419 | switch(scan_state){ |
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420 | case SCAN_IDLE: |
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421 | case SCAN_PAUSED: |
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422 | pause_data_queue = 0; |
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423 | if(active_network_info != NULL){ |
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424 | wlan_mac_high_set_radio_channel( |
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425 | wlan_mac_high_bss_channel_spec_to_radio_chan(active_network_info->bss_config.chan_spec)); |
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426 | } |
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427 | break; |
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428 | case SCAN_RUNNING: |
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429 | pause_data_queue = 1; |
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430 | break; |
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431 | } |
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432 | } |
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433 | |
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434 | |
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435 | |
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436 | /*****************************************************************************/ |
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437 | /** |
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438 | * @brief Poll Tx queues to select next available packet to transmit |
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439 | * |
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440 | *****************************************************************************/ |
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441 | #define NUM_QUEUE_GROUPS 2 |
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442 | typedef enum queue_group_t{ |
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443 | MGMT_QGRP, |
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444 | DATA_QGRP |
---|
445 | } queue_group_t; |
---|
446 | |
---|
447 | /*****************************************************************************/ |
---|
448 | /** |
---|
449 | * @brief Poll Tx queues to select next available packet to transmit |
---|
450 | * |
---|
451 | * This function will attempt to completely fill all Tx packet buffers in the |
---|
452 | * PKT_BUF_GROUP_GENERAL group. Dequeueing occurs with a nested round-robing policy: |
---|
453 | * 1) The function will alternate between dequeueing management and data frames in order |
---|
454 | * to prioritize time-critical management responses probe responses. |
---|
455 | * 2) Data frames will be dequeued round-robin for station for which packets are enqueued. |
---|
456 | * Multicast frames are treated like their own station for the purposes of this policy. |
---|
457 | * |
---|
458 | *****************************************************************************/ |
---|
459 | void poll_tx_queues(){ |
---|
460 | interrupt_state_t curr_interrupt_state; |
---|
461 | dl_entry* tx_queue_entry; |
---|
462 | u32 i; |
---|
463 | |
---|
464 | int num_pkt_bufs_avail; |
---|
465 | int poll_loop_cnt; |
---|
466 | |
---|
467 | // Remember the next group to poll between calls to this function |
---|
468 | // This implements the ping-pong poll between the MGMT_QGRP and DATA_QGRP groups |
---|
469 | static queue_group_t next_queue_group = MGMT_QGRP; |
---|
470 | queue_group_t curr_queue_group; |
---|
471 | |
---|
472 | // Remember the last queue polled between calls to this function |
---|
473 | // This implements the round-robin poll of queues in the DATA_QGRP group |
---|
474 | static station_info_entry_t* next_station_info_entry = NULL; |
---|
475 | station_info_entry_t* curr_station_info_entry; |
---|
476 | |
---|
477 | station_info_t* curr_station_info; |
---|
478 | |
---|
479 | // Stop interrupts for all processing below - this avoids many possible race conditions, |
---|
480 | // like new packets being enqueued or stations joining/leaving the BSS |
---|
481 | curr_interrupt_state = wlan_platform_intc_stop(); |
---|
482 | |
---|
483 | // First handle the general packet buffer group |
---|
484 | num_pkt_bufs_avail = wlan_mac_num_tx_pkt_buf_available(PKT_BUF_GROUP_GENERAL); |
---|
485 | |
---|
486 | // This loop will (at most) check every queue twice |
---|
487 | // This handles the case of a single non-empty queue needing to supply packets |
---|
488 | // for both GENERAL packet buffers |
---|
489 | poll_loop_cnt = 0; |
---|
490 | while((num_pkt_bufs_avail > 0) && (poll_loop_cnt < (2*NUM_QUEUE_GROUPS))) { |
---|
491 | poll_loop_cnt++; |
---|
492 | curr_queue_group = next_queue_group; |
---|
493 | |
---|
494 | if(curr_queue_group == MGMT_QGRP) { |
---|
495 | // Poll the management queue on this loop, data queues on next loop |
---|
496 | next_queue_group = DATA_QGRP; |
---|
497 | tx_queue_entry = queue_dequeue(mgmt_qid); |
---|
498 | if(tx_queue_entry) { |
---|
499 | // Update the packet buffer group |
---|
500 | ((tx_80211_queue_buffer_t*)(tx_queue_entry->data))->tx_queue_details.pkt_buf_group = PKT_BUF_GROUP_GENERAL; |
---|
501 | // Successfully dequeued a management packet - transmit and checkin |
---|
502 | wlan_mac_transmit_wireless(tx_queue_entry); |
---|
503 | //continue the loop |
---|
504 | num_pkt_bufs_avail--; |
---|
505 | continue; |
---|
506 | } |
---|
507 | } else { |
---|
508 | // Poll the data queues on this loop, management queue on next loop |
---|
509 | next_queue_group = MGMT_QGRP; |
---|
510 | |
---|
511 | if(pause_data_queue) { |
---|
512 | // Data queues are paused - skip any dequeue attempts and continue the loop |
---|
513 | continue; |
---|
514 | } |
---|
515 | |
---|
516 | for(i = 0; i < (active_network_info->members.length + 1); i++) { |
---|
517 | // Resume polling data queues from where we stopped on the previous call |
---|
518 | curr_station_info_entry = next_station_info_entry; |
---|
519 | |
---|
520 | // Loop through all associated stations' queues and the broadcast queue |
---|
521 | if(curr_station_info_entry == NULL) { |
---|
522 | next_station_info_entry = (station_info_entry_t*)(active_network_info->members.first); |
---|
523 | |
---|
524 | tx_queue_entry = queue_dequeue(mcast_qid); |
---|
525 | if(tx_queue_entry) { |
---|
526 | // Update the packet buffer group |
---|
527 | ((tx_80211_queue_buffer_t*)(tx_queue_entry->data))->tx_queue_details.pkt_buf_group = PKT_BUF_GROUP_GENERAL; |
---|
528 | // Successfully dequeued a management packet - transmit and checkin |
---|
529 | wlan_mac_transmit_wireless(tx_queue_entry); |
---|
530 | // Successfully dequeued a multicast packet - end the DATA_QGRP loop |
---|
531 | num_pkt_bufs_avail--; |
---|
532 | break; |
---|
533 | } |
---|
534 | } else { |
---|
535 | // Check the queue for an associated station |
---|
536 | curr_station_info = (station_info_t*)(curr_station_info_entry->data); |
---|
537 | |
---|
538 | if( station_info_is_member(&active_network_info->members, curr_station_info)) { |
---|
539 | if(curr_station_info_entry == (station_info_entry_t*)(active_network_info->members.last)){ |
---|
540 | // We've reached the end of the table, so we wrap around to the beginning |
---|
541 | next_station_info_entry = NULL; |
---|
542 | } else { |
---|
543 | next_station_info_entry = dl_entry_next(curr_station_info_entry); |
---|
544 | } |
---|
545 | |
---|
546 | tx_queue_entry = queue_dequeue(curr_station_info->QID); |
---|
547 | if(tx_queue_entry) { |
---|
548 | // Update the packet buffer group |
---|
549 | ((tx_80211_queue_buffer_t*)(tx_queue_entry->data))->tx_queue_details.pkt_buf_group = PKT_BUF_GROUP_GENERAL; |
---|
550 | // Successfully dequeued a management packet - transmit and checkin |
---|
551 | wlan_mac_transmit_wireless(tx_queue_entry); |
---|
552 | // Successfully dequeued a unicast packet for this station - end the DATA_QGRP loop |
---|
553 | num_pkt_bufs_avail--; |
---|
554 | break; |
---|
555 | } |
---|
556 | |
---|
557 | } else { |
---|
558 | // This curr_station_info is invalid. Perhaps it was removed from |
---|
559 | // the association table before poll_tx_queues was called. We will |
---|
560 | // start the round robin checking back at broadcast. |
---|
561 | next_station_info_entry = NULL; |
---|
562 | } // END if(curr_station_info is BSS member) |
---|
563 | } // END if(multicast queue or station queue) |
---|
564 | } // END for loop over association table |
---|
565 | } // END if(MGMT or DATA queue group) |
---|
566 | } // END while(buffers available && keep polling) |
---|
567 | |
---|
568 | wlan_platform_intc_set_state(curr_interrupt_state); |
---|
569 | } |
---|
570 | |
---|
571 | /*****************************************************************************/ |
---|
572 | /** |
---|
573 | * @brief Purges all packets from all Tx queues |
---|
574 | * |
---|
575 | * This function discards all currently en-queued packets awaiting transmission and returns all |
---|
576 | * queue entries to the free pool. |
---|
577 | * |
---|
578 | * This function does not discard packets already submitted to the lower-level MAC for transmission |
---|
579 | * |
---|
580 | * @param None |
---|
581 | * @return None |
---|
582 | *****************************************************************************/ |
---|
583 | void purge_all_wireless_tx_queue(){ |
---|
584 | station_info_entry_t* curr_station_info_entry; |
---|
585 | station_info_t* curr_station_info; |
---|
586 | |
---|
587 | int iter = active_network_info->members.length; |
---|
588 | |
---|
589 | // Purge all data transmit queues |
---|
590 | wlan_mac_purge_wireless_tx(mcast_qid); // Broadcast Queue |
---|
591 | wlan_mac_purge_wireless_tx(mgmt_qid); // Unicast Management queue |
---|
592 | |
---|
593 | if(active_network_info != NULL){ |
---|
594 | curr_station_info_entry = (station_info_entry_t*)(active_network_info->members.first); |
---|
595 | while( (curr_station_info_entry != NULL) && (iter-- > 0) ){ |
---|
596 | curr_station_info = curr_station_info_entry->data; |
---|
597 | wlan_mac_purge_wireless_tx(curr_station_info->QID); // Each unicast queue |
---|
598 | curr_station_info_entry = dl_entry_next(curr_station_info_entry); |
---|
599 | } |
---|
600 | } |
---|
601 | } |
---|
602 | |
---|
603 | /*****************************************************************************/ |
---|
604 | /** |
---|
605 | * @brief Callback to handle insertion of an Ethernet reception into the corresponding wireless Tx queue |
---|
606 | * |
---|
607 | * This function is called when a new Ethernet packet is received that must be transmitted via the wireless interface. |
---|
608 | * The packet must be encapsulated before it is passed to this function. Ethernet encapsulation is implemented in the mac_high framework. |
---|
609 | * |
---|
610 | *****************************************************************************/ |
---|
611 | int ethernet_receive(eth_rx_queue_buffer_t* eth_rx_queue_buffer){ |
---|
612 | ethernet_header_t* eth_hdr; |
---|
613 | tx_80211_queue_buffer_t* tx_queue_buffer; |
---|
614 | station_info_t* station_info = NULL; |
---|
615 | station_info_entry_t* station_info_entry; |
---|
616 | u32 queue_id; |
---|
617 | |
---|
618 | if(active_network_info != NULL){ |
---|
619 | |
---|
620 | eth_hdr = (ethernet_header_t*)eth_rx_queue_buffer->pkt; |
---|
621 | |
---|
622 | if( (eth_hdr->ethertype != ETH_TYPE_ARP) && (eth_hdr->ethertype != ETH_TYPE_IP) ) return 0; |
---|
623 | |
---|
624 | //Encapsulate the packet |
---|
625 | // Note: the encapsulation function handles filling in the C0/C1 lengths and C1 offset for us |
---|
626 | tx_queue_buffer = wlan_eth_encap( eth_rx_queue_buffer, WLAN_ETH_ENCAP_FLAGS_OVERWRITE_PYLD_ADDRS ); |
---|
627 | if(tx_queue_buffer){ |
---|
628 | tx_queue_buffer->flags = 0; |
---|
629 | |
---|
630 | wlan_create_data_frame_header(tx_queue_buffer->pkt, |
---|
631 | eth_hdr->dest_mac_addr, |
---|
632 | wlan_mac_addr, |
---|
633 | active_network_info->bss_config.bssid, |
---|
634 | 0); |
---|
635 | |
---|
636 | if( wlan_addr_mcast(eth_hdr->dest_mac_addr) ){ |
---|
637 | // Fill in metadata |
---|
638 | queue_id = mcast_qid; |
---|
639 | tx_queue_buffer->flags = 0; |
---|
640 | |
---|
641 | // Assign a station_info_t struct |
---|
642 | // Notes: (1) if one exists already, it will be adopted. |
---|
643 | // (2) if no heap exists for creating one, NULL is a valid |
---|
644 | // value for the station_info_t* |
---|
645 | tx_queue_buffer->station_info = station_info_create(eth_hdr->dest_mac_addr); |
---|
646 | } else { |
---|
647 | |
---|
648 | station_info_entry = station_info_find_by_addr(eth_hdr->dest_mac_addr, &active_network_info->members); |
---|
649 | |
---|
650 | if(station_info_entry != NULL){ |
---|
651 | station_info = (station_info_t*)station_info_entry->data; |
---|
652 | } else { |
---|
653 | // Add station info |
---|
654 | // - Set ht_capable argument to the HT_CAPABLE capability of the BSS. Given that the node does not know |
---|
655 | // the HT capabilities of the new station, it is reasonable to assume that they are the same as the BSS. |
---|
656 | // |
---|
657 | station_info = network_info_add_member(active_network_info, eth_hdr->dest_mac_addr, max_queue_size); |
---|
658 | |
---|
659 | if(station_info != NULL){ |
---|
660 | |
---|
661 | if(active_network_info->bss_config.ht_capable){ |
---|
662 | station_info->capabilities |= STATION_INFO_CAPABILITIES_HT_CAPABLE; |
---|
663 | } else { |
---|
664 | station_info->capabilities &= ~STATION_INFO_CAPABILITIES_HT_CAPABLE; |
---|
665 | } |
---|
666 | |
---|
667 | station_info->flags |= STATION_INFO_FLAG_KEEP; |
---|
668 | time_hr_min_sec_t time_hr_min_sec = wlan_mac_time_to_hr_min_sec(get_system_time_usec()); |
---|
669 | xil_printf("*%dh:%02dm:%02ds* IBSS 0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x added to BSS\n", |
---|
670 | time_hr_min_sec.hr, time_hr_min_sec.min, time_hr_min_sec.sec, |
---|
671 | eth_hdr->dest_mac_addr[0], eth_hdr->dest_mac_addr[1], eth_hdr->dest_mac_addr[2], |
---|
672 | eth_hdr->dest_mac_addr[3], eth_hdr->dest_mac_addr[4], eth_hdr->dest_mac_addr[5]); |
---|
673 | } |
---|
674 | |
---|
675 | wlan_platform_high_userio_disp_status(USERIO_DISP_STATUS_MEMBER_LIST_UPDATE, active_network_info->members.length); |
---|
676 | } |
---|
677 | |
---|
678 | if( station_info == NULL ){ |
---|
679 | queue_id = mcast_qid; |
---|
680 | } else { |
---|
681 | queue_id = station_info->QID; |
---|
682 | } |
---|
683 | |
---|
684 | // Fill in metadata |
---|
685 | tx_queue_buffer->flags = TX_80211_QUEUE_BUFFER_FLAGS_FILL_DURATION; |
---|
686 | tx_queue_buffer->station_info = station_info; |
---|
687 | } |
---|
688 | } else { |
---|
689 | // Ethernet encapsulation failed, so we have nothing to send |
---|
690 | return 0; |
---|
691 | } |
---|
692 | if(queue_length(queue_id) < max_queue_size){ |
---|
693 | // Put the packet in the queue |
---|
694 | wlan_mac_enqueue_wireless_tx(queue_id, tx_queue_buffer->pyld_queue_hdr.dle); |
---|
695 | } else { |
---|
696 | // Packet was not successfully enqueued |
---|
697 | return 0; |
---|
698 | } |
---|
699 | |
---|
700 | // Packet was successfully enqueued |
---|
701 | return 1; |
---|
702 | } else { |
---|
703 | // Packet was not successfully enqueued |
---|
704 | return 0; |
---|
705 | } |
---|
706 | } |
---|
707 | |
---|
708 | |
---|
709 | |
---|
710 | /*****************************************************************************/ |
---|
711 | /** |
---|
712 | * @brief Process received MPDUs |
---|
713 | * |
---|
714 | * This callback function will process all the received MPDUs.. |
---|
715 | * |
---|
716 | * @param void* pkt_buf_addr |
---|
717 | * - Packet buffer address; Contains the contents of the MPDU as well as other packet information from CPU low |
---|
718 | * @param station_info_t * station_info |
---|
719 | * - Pointer to metadata about the station from which this frame was received |
---|
720 | * @param rx_common_entry* rx_event_log_entry |
---|
721 | * - Pointer to the log entry created for this reception by the MAC High Framework |
---|
722 | * @return u32 flags |
---|
723 | * |
---|
724 | *****************************************************************************/ |
---|
725 | u32 mpdu_rx_process(void* pkt_buf_addr, station_info_t* station_info, rx_common_entry* rx_event_log_entry) { |
---|
726 | |
---|
727 | rx_frame_info_t* rx_frame_info = (rx_frame_info_t*)pkt_buf_addr; |
---|
728 | void* mac_payload = (u8*)pkt_buf_addr + PHY_RX_PKT_BUF_MPDU_OFFSET; |
---|
729 | u8* mac_payload_ptr_u8 = (u8*)mac_payload; |
---|
730 | mac_header_80211* rx_80211_header = (mac_header_80211*)((void *)mac_payload_ptr_u8); |
---|
731 | |
---|
732 | u16 rx_seq; |
---|
733 | |
---|
734 | dl_entry* tx_queue_entry; |
---|
735 | tx_80211_queue_buffer_t* tx_queue_buffer; |
---|
736 | |
---|
737 | u8 unicast_to_me; |
---|
738 | u8 to_multicast; |
---|
739 | u8 send_response = 0; |
---|
740 | u32 tx_length; |
---|
741 | |
---|
742 | u32 return_val = 0; |
---|
743 | u16 length = rx_frame_info->phy_details.length; |
---|
744 | |
---|
745 | // If this function was passed a CTRL frame (e.g., CTS, ACK), then we should just quit. |
---|
746 | // The only reason this occured was so that it could be logged in the line above. |
---|
747 | if((rx_80211_header->frame_control_1 & 0xF) == MAC_FRAME_CTRL1_TYPE_CTRL){ |
---|
748 | goto mpdu_rx_process_end; |
---|
749 | } |
---|
750 | |
---|
751 | // Determine destination of packet |
---|
752 | unicast_to_me = wlan_addr_eq(rx_80211_header->address_1, wlan_mac_addr); |
---|
753 | to_multicast = wlan_addr_mcast(rx_80211_header->address_1); |
---|
754 | |
---|
755 | // If the packet is good (ie good FCS) and it is destined for me, then process it |
---|
756 | if( (rx_frame_info->flags & RX_FRAME_INFO_FLAGS_FCS_GOOD)){ |
---|
757 | |
---|
758 | // Sequence number is 12 MSB of seq_control field |
---|
759 | rx_seq = ((rx_80211_header->sequence_control) >> 4) & 0xFFF; |
---|
760 | |
---|
761 | // Check if this was a duplicate reception |
---|
762 | // - Packet is unicast and directed towards me |
---|
763 | // - Packet has the RETRY bit set to 1 in the second frame control byte |
---|
764 | // - Received seq num matched previously received seq num for this STA |
---|
765 | if( (station_info != NULL) && unicast_to_me ){ |
---|
766 | if( ((rx_80211_header->frame_control_2) & MAC_FRAME_CTRL2_FLAG_RETRY) && (station_info->latest_rx_seq == rx_seq) ) { |
---|
767 | if(rx_event_log_entry != NULL){ |
---|
768 | rx_event_log_entry->flags |= RX_FLAGS_DUPLICATE; |
---|
769 | return_val |= MAC_RX_CALLBACK_RETURN_FLAG_DUP; |
---|
770 | } |
---|
771 | } else { |
---|
772 | station_info->latest_rx_seq = rx_seq; |
---|
773 | } |
---|
774 | } |
---|
775 | |
---|
776 | // Update the association information |
---|
777 | if(active_network_info != NULL){ |
---|
778 | if(wlan_addr_eq(rx_80211_header->address_3, active_network_info->bss_config.bssid)){ |
---|
779 | if( station_info != NULL && station_info_is_member(&active_network_info->members, station_info) == 0 ){ |
---|
780 | // Add station info |
---|
781 | // - Set ht_capable argument to the HT_CAPABLE capability of the BSS. Given that the node does not know |
---|
782 | // the HT capabilities of the new station, it is reasonable to assume that they are the same as the BSS. |
---|
783 | // |
---|
784 | // Note: we do not need the returned station_info_t* from this function since it is guaranteed to match |
---|
785 | // the "station_info" argument to the mpdu_rx_process function |
---|
786 | network_info_add_member(active_network_info, rx_80211_header->address_2, max_queue_size); |
---|
787 | |
---|
788 | // Open a queue for this station for outgoing unicast DATA frames |
---|
789 | if(active_network_info->bss_config.ht_capable){ |
---|
790 | station_info->capabilities |= STATION_INFO_CAPABILITIES_HT_CAPABLE; |
---|
791 | } else { |
---|
792 | station_info->capabilities &= ~STATION_INFO_CAPABILITIES_HT_CAPABLE; |
---|
793 | } |
---|
794 | station_info->flags |= STATION_INFO_FLAG_KEEP; |
---|
795 | time_hr_min_sec_t time_hr_min_sec = wlan_mac_time_to_hr_min_sec(get_system_time_usec()); |
---|
796 | xil_printf("*%dh:%02dm:%02ds* IBSS 0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x added to BSS\n", |
---|
797 | time_hr_min_sec.hr, time_hr_min_sec.min, time_hr_min_sec.sec, |
---|
798 | rx_80211_header->address_2[0], rx_80211_header->address_2[1], rx_80211_header->address_2[2], |
---|
799 | rx_80211_header->address_2[3], rx_80211_header->address_2[4], rx_80211_header->address_2[5]); |
---|
800 | |
---|
801 | wlan_platform_high_userio_disp_status(USERIO_DISP_STATUS_MEMBER_LIST_UPDATE, active_network_info->members.length); |
---|
802 | } |
---|
803 | } |
---|
804 | } |
---|
805 | |
---|
806 | if(station_info != NULL) { |
---|
807 | |
---|
808 | |
---|
809 | // Check if this was a duplicate reception |
---|
810 | // - Received seq num matched previously received seq num for this STA |
---|
811 | if( return_val & MAC_RX_CALLBACK_RETURN_FLAG_DUP) { |
---|
812 | // Finish the function |
---|
813 | goto mpdu_rx_process_end; |
---|
814 | } |
---|
815 | } |
---|
816 | |
---|
817 | if(unicast_to_me || to_multicast){ |
---|
818 | // Process the packet |
---|
819 | switch(rx_80211_header->frame_control_1) { |
---|
820 | |
---|
821 | //--------------------------------------------------------------------- |
---|
822 | case MAC_FRAME_CTRL1_SUBTYPE_QOSDATA: |
---|
823 | case (MAC_FRAME_CTRL1_SUBTYPE_DATA): |
---|
824 | // Data packet |
---|
825 | // - If the STA is associated with the AP and this is from the DS, then transmit over the wired network |
---|
826 | // |
---|
827 | if(active_network_info != NULL){ |
---|
828 | if(wlan_addr_eq(rx_80211_header->address_3, active_network_info->bss_config.bssid)) { |
---|
829 | // MPDU is flagged as destined to the DS - send it for de-encapsulation and Ethernet Tx (if appropriate) |
---|
830 | #if WLAN_SW_CONFIG_ENABLE_ETH_BRIDGE |
---|
831 | wlan_eth_decap_and_send(mac_payload, |
---|
832 | NULL, |
---|
833 | rx_80211_header->address_2, |
---|
834 | length, |
---|
835 | WLAN_ETH_ENCAP_FLAGS_OVERWRITE_PYLD_ADDRS); |
---|
836 | #endif |
---|
837 | } |
---|
838 | } |
---|
839 | break; |
---|
840 | |
---|
841 | //--------------------------------------------------------------------- |
---|
842 | case (MAC_FRAME_CTRL1_SUBTYPE_PROBE_REQ): |
---|
843 | if(active_network_info != NULL){ |
---|
844 | if(wlan_addr_eq(rx_80211_header->address_3, bcast_addr)) { |
---|
845 | mac_payload_ptr_u8 += sizeof(mac_header_80211); |
---|
846 | |
---|
847 | // Loop through tagged parameters |
---|
848 | while(((u32)mac_payload_ptr_u8 - (u32)mac_payload)<= (length - WLAN_PHY_FCS_NBYTES)){ |
---|
849 | |
---|
850 | // What kind of tag is this? |
---|
851 | switch(mac_payload_ptr_u8[0]){ |
---|
852 | //----------------------------------------------------- |
---|
853 | case MGMT_TAG_SSID: |
---|
854 | // SSID parameter set |
---|
855 | if((mac_payload_ptr_u8[1]==0) || (memcmp(mac_payload_ptr_u8+2, (u8*)default_ssid, mac_payload_ptr_u8[1])==0)) { |
---|
856 | // Broadcast SSID or my SSID - send unicast probe response |
---|
857 | send_response = 1; |
---|
858 | } |
---|
859 | break; |
---|
860 | |
---|
861 | //----------------------------------------------------- |
---|
862 | case MGMT_TAG_SUPPORTED_RATES: |
---|
863 | // Supported rates |
---|
864 | break; |
---|
865 | |
---|
866 | //----------------------------------------------------- |
---|
867 | case MGMT_TAG_EXTENDED_SUPPORTED_RATES: |
---|
868 | // Extended supported rates |
---|
869 | break; |
---|
870 | |
---|
871 | //----------------------------------------------------- |
---|
872 | case MGMT_TAG_DSSS_PARAMETER_SET: |
---|
873 | // DS Parameter set (e.g. channel) |
---|
874 | break; |
---|
875 | } |
---|
876 | |
---|
877 | // Move up to the next tag |
---|
878 | mac_payload_ptr_u8 += mac_payload_ptr_u8[1]+2; |
---|
879 | } |
---|
880 | |
---|
881 | if(send_response) { |
---|
882 | // Create a probe response frame |
---|
883 | tx_queue_entry = queue_checkout(); |
---|
884 | |
---|
885 | if(tx_queue_entry != NULL){ |
---|
886 | tx_queue_buffer = (tx_80211_queue_buffer_t*)(tx_queue_entry->data); |
---|
887 | |
---|
888 | tx_length = wlan_create_probe_resp_frame(tx_queue_buffer->pkt, |
---|
889 | rx_80211_header->address_2, |
---|
890 | wlan_mac_addr, |
---|
891 | active_network_info->bss_config.bssid, |
---|
892 | active_network_info); |
---|
893 | |
---|
894 | // Fill in metadata |
---|
895 | tx_queue_buffer->flags = TX_80211_QUEUE_BUFFER_FLAGS_FILL_DURATION | TX_80211_QUEUE_BUFFER_FLAGS_FILL_TIMESTAMP; |
---|
896 | tx_queue_buffer->length = tx_length; |
---|
897 | tx_queue_buffer->seg0_len = tx_length; |
---|
898 | tx_queue_buffer->seg1_len = 0; |
---|
899 | tx_queue_buffer->seg1_offset = 0; |
---|
900 | tx_queue_buffer->station_info = station_info; |
---|
901 | |
---|
902 | // Put the packet in the queue |
---|
903 | wlan_mac_enqueue_wireless_tx(mgmt_qid, tx_queue_entry); |
---|
904 | } |
---|
905 | |
---|
906 | // Finish the function |
---|
907 | goto mpdu_rx_process_end; |
---|
908 | } |
---|
909 | } |
---|
910 | } |
---|
911 | break; |
---|
912 | |
---|
913 | //--------------------------------------------------------------------- |
---|
914 | default: |
---|
915 | //This should be left as a verbose print. It occurs often when communicating with mobile devices since they tend to send |
---|
916 | //null data frames (type: DATA, subtype: 0x4) for power management reasons. |
---|
917 | wlan_printf(PL_VERBOSE, "Received unknown frame control type/subtype %x\n",rx_80211_header->frame_control_1); |
---|
918 | break; |
---|
919 | } |
---|
920 | } |
---|
921 | // Finish the function |
---|
922 | goto mpdu_rx_process_end; |
---|
923 | } else { |
---|
924 | // Process any Bad FCS packets |
---|
925 | goto mpdu_rx_process_end; |
---|
926 | } |
---|
927 | |
---|
928 | |
---|
929 | // Finish any processing for the RX MPDU process |
---|
930 | mpdu_rx_process_end: |
---|
931 | |
---|
932 | return return_val; |
---|
933 | } |
---|
934 | |
---|
935 | |
---|
936 | |
---|
937 | /*****************************************************************************/ |
---|
938 | /** |
---|
939 | * @brief Check the time since the station has interacted with another station |
---|
940 | * |
---|
941 | * |
---|
942 | * @param None |
---|
943 | * @return None |
---|
944 | *****************************************************************************/ |
---|
945 | void remove_inactive_station_infos() { |
---|
946 | |
---|
947 | u64 time_since_last_activity; |
---|
948 | station_info_t* curr_station_info; |
---|
949 | station_info_entry_t* curr_station_info_entry; |
---|
950 | station_info_entry_t* next_station_info_entry; |
---|
951 | |
---|
952 | if(active_network_info != NULL){ |
---|
953 | next_station_info_entry = (station_info_entry_t*)active_network_info->members.first; |
---|
954 | |
---|
955 | while(next_station_info_entry != NULL) { |
---|
956 | curr_station_info_entry = next_station_info_entry; |
---|
957 | next_station_info_entry = dl_entry_next(curr_station_info_entry); |
---|
958 | |
---|
959 | curr_station_info = (station_info_t*)(curr_station_info_entry->data); |
---|
960 | time_since_last_activity = (get_system_time_usec() - curr_station_info->latest_rx_timestamp); |
---|
961 | |
---|
962 | // De-authenticate the station if we have timed out and we have not disabled this check for the station |
---|
963 | if((time_since_last_activity > ASSOCIATION_TIMEOUT_US) && ((curr_station_info->flags & STATION_INFO_FLAG_DISABLE_ASSOC_CHECK) == 0)){ |
---|
964 | wlan_mac_purge_wireless_tx(curr_station_info->QID); |
---|
965 | network_info_remove_member( active_network_info, curr_station_info->addr ); |
---|
966 | wlan_platform_high_userio_disp_status(USERIO_DISP_STATUS_MEMBER_LIST_UPDATE, active_network_info->members.length); |
---|
967 | |
---|
968 | time_hr_min_sec_t time_hr_min_sec = wlan_mac_time_to_hr_min_sec(get_system_time_usec()); |
---|
969 | xil_printf("*%dh:%02dm:%02ds* IBSS 0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x removed from BSS\n", |
---|
970 | time_hr_min_sec.hr, time_hr_min_sec.min, time_hr_min_sec.sec, |
---|
971 | curr_station_info->addr[0], curr_station_info->addr[1], curr_station_info->addr[2], |
---|
972 | curr_station_info->addr[3], curr_station_info->addr[4], curr_station_info->addr[5]); |
---|
973 | |
---|
974 | curr_station_info->flags &= ~STATION_INFO_FLAG_KEEP; |
---|
975 | |
---|
976 | } |
---|
977 | } |
---|
978 | } |
---|
979 | } |
---|
980 | |
---|
981 | |
---|
982 | #if WLAN_SW_CONFIG_ENABLE_LTG |
---|
983 | /*****************************************************************************/ |
---|
984 | /** |
---|
985 | * @brief Callback to handle new Local Traffic Generator event |
---|
986 | * |
---|
987 | * This function is called when the LTG scheduler determines a traffic generator should create a new packet. The |
---|
988 | * behavior of this function depends entirely on the LTG payload parameters. |
---|
989 | * |
---|
990 | * The reference implementation defines 3 LTG payload types: |
---|
991 | * - LTG_PYLD_TYPE_FIXED: generate 1 fixed-length packet to single destination; callback_arg is pointer to ltg_pyld_fixed_t struct |
---|
992 | * - LTG_PYLD_TYPE_UNIFORM_RAND: generate 1 random-length packet to single destination; callback_arg is pointer to ltg_pyld_uniform_rand_t struct |
---|
993 | * - LTG_PYLD_TYPE_ALL_ASSOC_FIXED: generate 1 fixed-length packet to each associated station; callback_arg is pointer to ltg_pyld_all_assoc_fixed_t struct |
---|
994 | * |
---|
995 | * @param u32 id |
---|
996 | * - Unique ID of the previously created LTG |
---|
997 | * @param void* callback_arg |
---|
998 | * - Callback argument provided at LTG creation time; interpretation depends on LTG type |
---|
999 | * @return None |
---|
1000 | *****************************************************************************/ |
---|
1001 | void ltg_event(u32 id, void* callback_arg){ |
---|
1002 | |
---|
1003 | u32 payload_length; |
---|
1004 | u32 min_ltg_payload_length; |
---|
1005 | station_info_entry_t* station_info_entry = NULL; |
---|
1006 | station_info_t* station_info = NULL; |
---|
1007 | u8* addr_da; |
---|
1008 | u8 is_multicast; |
---|
1009 | u8 queue_id; |
---|
1010 | dl_entry* tx_queue_entry = NULL; |
---|
1011 | tx_80211_queue_buffer_t* tx_queue_buffer = NULL; |
---|
1012 | u8 continue_loop; |
---|
1013 | u16 flags = TX_80211_QUEUE_BUFFER_FLAGS_FILL_UNIQ_SEQ; |
---|
1014 | u8* addr_ra; |
---|
1015 | u16 duration; |
---|
1016 | |
---|
1017 | if(((ltg_pyld_hdr_t*)callback_arg)->type == LTG_PYLD_TYPE_CTRL_RESP){ |
---|
1018 | |
---|
1019 | tx_queue_entry = queue_checkout(); |
---|
1020 | if(tx_queue_entry != NULL){ |
---|
1021 | tx_queue_buffer = ((tx_80211_queue_buffer_t*)(tx_queue_entry->data)); |
---|
1022 | |
---|
1023 | addr_ra = ((ltg_pyld_ctrl_resp_t*)callback_arg)->addr_ra; |
---|
1024 | duration = ((ltg_pyld_ctrl_resp_t*)callback_arg)->duration; |
---|
1025 | |
---|
1026 | if(((ltg_pyld_ctrl_resp_t*)callback_arg)->subtype == LTG_PYLD_CTRL_RESP_SUBTYPE_CTS){ |
---|
1027 | payload_length = wlan_create_cts_frame(tx_queue_buffer->pkt, |
---|
1028 | addr_ra, |
---|
1029 | duration); |
---|
1030 | tx_queue_buffer->flags = TX_80211_QUEUE_BUFFER_FLAGS_TYPE_CTS; |
---|
1031 | } else { //LTG_PYLD_CTRL_RESP_SUBTYPE_ACK |
---|
1032 | payload_length = wlan_create_ack_frame(tx_queue_buffer->pkt, |
---|
1033 | addr_ra); |
---|
1034 | tx_queue_buffer->flags = TX_80211_QUEUE_BUFFER_FLAGS_TYPE_ACK; |
---|
1035 | } |
---|
1036 | |
---|
1037 | // Fill in metadata |
---|
1038 | tx_queue_buffer->flags |= TX_80211_QUEUE_BUFFER_FLAGS_BYPASS_RECOVERY; |
---|
1039 | tx_queue_buffer->length = payload_length; |
---|
1040 | |
---|
1041 | // With LTG_PYLD_TYPE_CTRL_RESP, we will transmit to the receive address (addr_ra) regardless of |
---|
1042 | // whether that address is an AP that we are associated to. To do that, we need to make sure that |
---|
1043 | // a station_info_t exists for that address |
---|
1044 | tx_queue_buffer->station_info = station_info_create(addr_ra); |
---|
1045 | |
---|
1046 | wlan_mac_enqueue_wireless_tx(mgmt_qid, tx_queue_entry); |
---|
1047 | |
---|
1048 | } |
---|
1049 | } else { |
---|
1050 | |
---|
1051 | |
---|
1052 | if(active_network_info != NULL){ |
---|
1053 | switch(((ltg_pyld_hdr_t*)callback_arg)->type){ |
---|
1054 | case LTG_PYLD_TYPE_FIXED: |
---|
1055 | payload_length = ((ltg_pyld_fixed_t*)callback_arg)->length; |
---|
1056 | addr_da = ((ltg_pyld_fixed_t*)callback_arg)->addr_da; |
---|
1057 | is_multicast = wlan_addr_mcast(addr_da); |
---|
1058 | if(is_multicast){ |
---|
1059 | queue_id = mcast_qid; |
---|
1060 | } else { |
---|
1061 | flags |= TX_80211_QUEUE_BUFFER_FLAGS_FILL_DURATION; |
---|
1062 | station_info_entry = station_info_find_by_addr(addr_da, &active_network_info->members); |
---|
1063 | if(station_info_entry != NULL){ |
---|
1064 | station_info = (station_info_t*)(station_info_entry->data); |
---|
1065 | queue_id = station_info->QID; |
---|
1066 | } else { |
---|
1067 | //Unlike the AP, this isn't necessarily a criteria for giving up on this LTG event. |
---|
1068 | //In the IBSS, it's possible that there simply wasn't room in the heap for a station_info, |
---|
1069 | //but we should still send it a packet. We'll use the multi-cast queue as a catch-all queue for these frames. |
---|
1070 | queue_id = mcast_qid; |
---|
1071 | } |
---|
1072 | } |
---|
1073 | break; |
---|
1074 | |
---|
1075 | case LTG_PYLD_TYPE_UNIFORM_RAND: |
---|
1076 | payload_length = (rand()%(((ltg_pyld_uniform_rand_t*)(callback_arg))->max_length - ((ltg_pyld_uniform_rand_t*)(callback_arg))->min_length))+((ltg_pyld_uniform_rand_t*)(callback_arg))->min_length; |
---|
1077 | addr_da = ((ltg_pyld_fixed_t*)callback_arg)->addr_da; |
---|
1078 | |
---|
1079 | is_multicast = wlan_addr_mcast(addr_da); |
---|
1080 | if(is_multicast){ |
---|
1081 | queue_id = mcast_qid; |
---|
1082 | } else { |
---|
1083 | flags |= TX_80211_QUEUE_BUFFER_FLAGS_FILL_DURATION; |
---|
1084 | station_info_entry = station_info_find_by_addr(addr_da, &active_network_info->members); |
---|
1085 | if(station_info_entry != NULL){ |
---|
1086 | station_info = (station_info_t*)(station_info_entry->data); |
---|
1087 | queue_id = station_info->QID; |
---|
1088 | } else { |
---|
1089 | //Unlike the AP, this isn't necessarily a criteria for giving up on this LTG event. |
---|
1090 | //In the IBSS, it's possible that there simply wasn't room in the heap for a station_info, |
---|
1091 | //but we should still send it a packet. We'll use the multi-cast queue as a catch-all queue for these frames. |
---|
1092 | queue_id = mcast_qid; |
---|
1093 | } |
---|
1094 | } |
---|
1095 | break; |
---|
1096 | |
---|
1097 | case LTG_PYLD_TYPE_ALL_ASSOC_FIXED: |
---|
1098 | if(active_network_info->members.length > 0){ |
---|
1099 | flags |= TX_80211_QUEUE_BUFFER_FLAGS_FILL_DURATION; |
---|
1100 | station_info_entry = (station_info_entry_t*)(active_network_info->members.first); |
---|
1101 | station_info = (station_info_t*)station_info_entry->data; |
---|
1102 | addr_da = station_info->addr; |
---|
1103 | queue_id = station_info->QID; |
---|
1104 | is_multicast = 0; |
---|
1105 | payload_length = ((ltg_pyld_all_assoc_fixed_t*)callback_arg)->length; |
---|
1106 | } else { |
---|
1107 | return; |
---|
1108 | } |
---|
1109 | break; |
---|
1110 | |
---|
1111 | default: |
---|
1112 | xil_printf("ERROR ltg_event: Unknown LTG Payload Type! (%d)\n", ((ltg_pyld_hdr_t*)callback_arg)->type); |
---|
1113 | return; |
---|
1114 | break; |
---|
1115 | } |
---|
1116 | |
---|
1117 | if(is_multicast == 0){ |
---|
1118 | station_info_entry = station_info_find_by_addr(addr_da, &active_network_info->members); |
---|
1119 | |
---|
1120 | if(station_info_entry == NULL){ |
---|
1121 | // Add station info |
---|
1122 | // - Set ht_capable argument to the HT_CAPABLE capability of the BSS. Given that the node does not know |
---|
1123 | // the HT capabilities of the new station, it is reasonable to assume that they are the same as the BSS. |
---|
1124 | // |
---|
1125 | station_info = network_info_add_member(active_network_info, addr_da, max_queue_size); |
---|
1126 | if(station_info != NULL){ |
---|
1127 | if(active_network_info->bss_config.ht_capable){ |
---|
1128 | station_info->capabilities |= STATION_INFO_CAPABILITIES_HT_CAPABLE; |
---|
1129 | } else { |
---|
1130 | station_info->capabilities &= ~STATION_INFO_CAPABILITIES_HT_CAPABLE; |
---|
1131 | } |
---|
1132 | station_info->flags |= STATION_INFO_FLAG_KEEP; |
---|
1133 | time_hr_min_sec_t time_hr_min_sec = wlan_mac_time_to_hr_min_sec(get_system_time_usec()); |
---|
1134 | xil_printf("*%dh:%02dm:%02ds* IBSS 0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x added to BSS\n", |
---|
1135 | time_hr_min_sec.hr, time_hr_min_sec.min, time_hr_min_sec.sec, |
---|
1136 | addr_da[0], addr_da[1], addr_da[2], |
---|
1137 | addr_da[3], addr_da[4], addr_da[5]); |
---|
1138 | } |
---|
1139 | wlan_platform_high_userio_disp_status(USERIO_DISP_STATUS_MEMBER_LIST_UPDATE, active_network_info->members.length); |
---|
1140 | } |
---|
1141 | } |
---|
1142 | |
---|
1143 | |
---|
1144 | do{ |
---|
1145 | continue_loop = 0; |
---|
1146 | |
---|
1147 | if(queue_length(queue_id) < max_queue_size){ |
---|
1148 | // Checkout 1 element from the queue; |
---|
1149 | tx_queue_entry = queue_checkout(); |
---|
1150 | if(tx_queue_entry != NULL){ |
---|
1151 | // Create LTG packet |
---|
1152 | tx_queue_buffer = ((tx_80211_queue_buffer_t*)(tx_queue_entry->data)); |
---|
1153 | |
---|
1154 | min_ltg_payload_length = wlan_create_ltg_frame(tx_queue_buffer->pkt, |
---|
1155 | addr_da, |
---|
1156 | wlan_mac_addr, |
---|
1157 | active_network_info->bss_config.bssid, |
---|
1158 | 0, |
---|
1159 | id); |
---|
1160 | payload_length = WLAN_MAX(payload_length+sizeof(mac_header_80211)+WLAN_PHY_FCS_NBYTES, min_ltg_payload_length); |
---|
1161 | |
---|
1162 | // Fill in metadata |
---|
1163 | tx_queue_buffer->length = payload_length; |
---|
1164 | tx_queue_buffer->seg0_len = min_ltg_payload_length; |
---|
1165 | tx_queue_buffer->seg1_len = 0; |
---|
1166 | tx_queue_buffer->seg1_offset = 0; |
---|
1167 | tx_queue_buffer->station_info = station_info; |
---|
1168 | tx_queue_buffer->flags = flags; |
---|
1169 | |
---|
1170 | // Submit the new packet to the appropriate queue |
---|
1171 | wlan_mac_enqueue_wireless_tx(queue_id, tx_queue_entry); |
---|
1172 | |
---|
1173 | |
---|
1174 | } else { |
---|
1175 | // There aren't any free queue elements right now. |
---|
1176 | // As such, there probably isn't any point to continuing this callback. |
---|
1177 | // We'll return and try again once it is called the next time. |
---|
1178 | return; |
---|
1179 | } |
---|
1180 | } |
---|
1181 | |
---|
1182 | if(((ltg_pyld_hdr_t*)callback_arg)->type == LTG_PYLD_TYPE_ALL_ASSOC_FIXED){ |
---|
1183 | station_info_entry = dl_entry_next(station_info_entry); |
---|
1184 | if(station_info_entry != NULL){ |
---|
1185 | station_info = (station_info_t*)station_info_entry->data; |
---|
1186 | addr_da = station_info->addr; |
---|
1187 | queue_id = station_info->QID; |
---|
1188 | is_multicast = 0; |
---|
1189 | continue_loop = 1; |
---|
1190 | } else { |
---|
1191 | continue_loop = 0; |
---|
1192 | } |
---|
1193 | } else { |
---|
1194 | continue_loop = 0; |
---|
1195 | } |
---|
1196 | } while(continue_loop == 1); |
---|
1197 | } |
---|
1198 | } |
---|
1199 | } |
---|
1200 | #endif //WLAN_SW_CONFIG_ENABLE_LTG |
---|
1201 | |
---|
1202 | /*****************************************************************************/ |
---|
1203 | /** |
---|
1204 | * @brief Handle a reboot of CPU_LOW |
---|
1205 | * |
---|
1206 | * If CPU_LOW reboots, any parameters we had previously set in it will be lost. |
---|
1207 | * This function is called to tell us that we should re-apply any previous |
---|
1208 | * parameters we had set. |
---|
1209 | * |
---|
1210 | * @param u32 type - type of MAC running in CPU_LOW |
---|
1211 | * @return None |
---|
1212 | *****************************************************************************/ |
---|
1213 | void handle_cpu_low_reboot(u32 type){ |
---|
1214 | if(active_network_info){ |
---|
1215 | // Re-apply any Beacon Tx configurations |
---|
1216 | wlan_mac_high_config_txrx_beacon(&gl_beacon_txrx_config); |
---|
1217 | } |
---|
1218 | } |
---|
1219 | |
---|
1220 | /*****************************************************************************/ |
---|
1221 | /** |
---|
1222 | * |
---|
1223 | *****************************************************************************/ |
---|
1224 | u32 configure_bss(bss_config_t* bss_config, u32 update_mask){ |
---|
1225 | u32 return_status = 0; |
---|
1226 | u8 update_beacon_template = 0; |
---|
1227 | u8 send_beacon_config_to_low = 0; |
---|
1228 | u8 send_channel_switch_to_low = 0; |
---|
1229 | |
---|
1230 | network_info_t* local_network_info; |
---|
1231 | interrupt_state_t curr_interrupt_state; |
---|
1232 | station_info_t* curr_station_info; |
---|
1233 | dl_entry* next_station_info_entry; |
---|
1234 | dl_entry* curr_station_info_entry; |
---|
1235 | int iter; |
---|
1236 | tx_params_t default_beacon_tx_params; |
---|
1237 | |
---|
1238 | //--------------------------------------------------------- |
---|
1239 | // 1. Check for any invalid inputs or combination of inputs |
---|
1240 | // First verify the requested update to the BSS configuration before |
---|
1241 | // modifying anything. This will prevent a partial update of BSS |
---|
1242 | // configuration with valid parameters before discovering an invalid |
---|
1243 | // parameter. |
---|
1244 | |
---|
1245 | if (bss_config != NULL) { |
---|
1246 | if (update_mask & BSS_FIELD_MASK_BSSID) { |
---|
1247 | if (wlan_addr_eq(bss_config->bssid, zero_addr) == 0) { |
---|
1248 | if ((active_network_info != NULL) && wlan_addr_eq(bss_config->bssid, active_network_info->bss_config.bssid)) { |
---|
1249 | // The caller of this function claimed that it was updating the BSSID, |
---|
1250 | // but the new BSSID matches the one already specified in active_bss_info. |
---|
1251 | // Complete the rest of this function as if that bit in the update mask |
---|
1252 | // were not set |
---|
1253 | update_mask &= ~BSS_FIELD_MASK_BSSID; |
---|
1254 | } else { |
---|
1255 | // Changing the BSSID, perform necessary argument checks |
---|
1256 | if ((bss_config->bssid[0] & MAC_ADDR_MSB_MASK_LOCAL ) == 0) { |
---|
1257 | // In the IBSS implementation, the BSSID provided must be locally generated |
---|
1258 | return_status |= BSS_CONFIG_FAILURE_BSSID_INVALID; |
---|
1259 | } |
---|
1260 | if (((update_mask & BSS_FIELD_MASK_SSID) == 0) || |
---|
1261 | ((update_mask & BSS_FIELD_MASK_CHAN) == 0) || |
---|
1262 | ((update_mask & BSS_FIELD_MASK_BEACON_INTERVAL) == 0)) { |
---|
1263 | return_status |= BSS_CONFIG_FAILURE_BSSID_INSUFFICIENT_ARGUMENTS; |
---|
1264 | } |
---|
1265 | } |
---|
1266 | } |
---|
1267 | } else { |
---|
1268 | if (active_network_info == NULL) { |
---|
1269 | // Cannot update BSS without specifying BSSID |
---|
1270 | return_status |= BSS_CONFIG_FAILURE_BSSID_INSUFFICIENT_ARGUMENTS; |
---|
1271 | } |
---|
1272 | } |
---|
1273 | if (update_mask & BSS_FIELD_MASK_CHAN) { |
---|
1274 | if (wlan_verify_channel( |
---|
1275 | wlan_mac_high_bss_channel_spec_to_radio_chan(bss_config->chan_spec)) != WLAN_SUCCESS) { |
---|
1276 | return_status |= BSS_CONFIG_FAILURE_CHANNEL_INVALID; |
---|
1277 | } |
---|
1278 | } |
---|
1279 | if (update_mask & BSS_FIELD_MASK_BEACON_INTERVAL) { |
---|
1280 | if ((bss_config->beacon_interval != BEACON_INTERVAL_NO_BEACON_TX) && |
---|
1281 | (bss_config->beacon_interval < 10)) { |
---|
1282 | return_status |= BSS_CONFIG_FAILURE_BEACON_INTERVAL_INVALID; |
---|
1283 | } |
---|
1284 | } |
---|
1285 | if (update_mask & BSS_FIELD_MASK_HT_CAPABLE) { |
---|
1286 | if (bss_config->ht_capable > 1) { |
---|
1287 | return_status |= BSS_CONFIG_FAILURE_HT_CAPABLE_INVALID; |
---|
1288 | } |
---|
1289 | } |
---|
1290 | if (update_mask & BSS_FIELD_MASK_DTIM_PERIOD) { |
---|
1291 | //IBSS DTIM is not supported at this time. Any attempt to update this field |
---|
1292 | //will return an error |
---|
1293 | return_status |= BSS_CONFIG_FAILURE_DTIM_PERIOD_INVALID; |
---|
1294 | } |
---|
1295 | } |
---|
1296 | |
---|
1297 | if (return_status == 0) { |
---|
1298 | //--------------------------------------------------------- |
---|
1299 | // 2. Apply BSS configuration changes |
---|
1300 | // Now that the provided bss_config_t struct is valid, apply the changes. |
---|
1301 | |
---|
1302 | // Disable interrupts around these modifications to prevent state |
---|
1303 | // changing out from underneath this context while the new BSS |
---|
1304 | // configuration parameters are only partially updated. |
---|
1305 | curr_interrupt_state = wlan_platform_intc_stop(); |
---|
1306 | |
---|
1307 | if ((bss_config == NULL) || (update_mask & BSS_FIELD_MASK_BSSID)) { |
---|
1308 | // Adopting a new BSSID. This could mean either |
---|
1309 | // 1) Shutting the BSS down |
---|
1310 | // or 2) Shutting the BSS down and then starting a new BSS. |
---|
1311 | // |
---|
1312 | // In either case, first remove any station_info structs |
---|
1313 | // that are members of the current active_bss_info and return to |
---|
1314 | // a NULL active_bss_info state. |
---|
1315 | // |
---|
1316 | // This will not result in any OTA transmissions to the stations. |
---|
1317 | |
---|
1318 | if (active_network_info != NULL) { |
---|
1319 | //Purge all tranmissions queues |
---|
1320 | purge_all_wireless_tx_queue(); |
---|
1321 | |
---|
1322 | if ((bss_config == NULL) || |
---|
1323 | ((update_mask & BSS_FIELD_MASK_BSSID) && wlan_addr_eq(bss_config->bssid, zero_addr)) ) { |
---|
1324 | xil_printf("Leaving BSS\n"); |
---|
1325 | } |
---|
1326 | |
---|
1327 | // Remove all associations |
---|
1328 | next_station_info_entry = active_network_info->members.first; |
---|
1329 | iter = active_network_info->members.length; |
---|
1330 | |
---|
1331 | while ((next_station_info_entry != NULL) && (iter-- > 0)) { |
---|
1332 | curr_station_info_entry = next_station_info_entry; |
---|
1333 | next_station_info_entry = dl_entry_next(curr_station_info_entry); |
---|
1334 | |
---|
1335 | curr_station_info = (station_info_t*)(curr_station_info_entry->data); |
---|
1336 | |
---|
1337 | // Remove the association |
---|
1338 | network_info_remove_member(active_network_info, curr_station_info->addr); |
---|
1339 | |
---|
1340 | time_hr_min_sec_t time_hr_min_sec = wlan_mac_time_to_hr_min_sec(get_system_time_usec()); |
---|
1341 | xil_printf("*%dh:%02dm:%02ds* IBSS 0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x removed from BSS\n", |
---|
1342 | time_hr_min_sec.hr, time_hr_min_sec.min, time_hr_min_sec.sec, |
---|
1343 | curr_station_info->addr[0], curr_station_info->addr[1], curr_station_info->addr[2], |
---|
1344 | curr_station_info->addr[3], curr_station_info->addr[4], curr_station_info->addr[5]); |
---|
1345 | |
---|
1346 | curr_station_info->flags &= ~STATION_INFO_FLAG_KEEP; |
---|
1347 | |
---|
1348 | // Update the hex display to show station was removed |
---|
1349 | wlan_platform_high_userio_disp_status(USERIO_DISP_STATUS_MEMBER_LIST_UPDATE, active_network_info->members.length); |
---|
1350 | } |
---|
1351 | |
---|
1352 | // Inform the MAC High Framework to no longer will keep this BSS Info. This will |
---|
1353 | // allow it to be overwritten in the future to make space for new BSS Infos. |
---|
1354 | active_network_info->flags &= ~NETWORK_FLAGS_KEEP; |
---|
1355 | |
---|
1356 | // Set "active_bss_info" to NULL |
---|
1357 | // - All functions must be able to handle active_bss_info = NULL |
---|
1358 | active_network_info = NULL; |
---|
1359 | |
---|
1360 | // Disable beacons immediately |
---|
1361 | ((tx_frame_info_t*)CALC_PKT_BUF_ADDR(platform_common_dev_info.tx_pkt_buf_baseaddr, TX_PKT_BUF_BEACON))->tx_pkt_buf_state = TX_PKT_BUF_HIGH_CTRL; |
---|
1362 | gl_beacon_txrx_config.beacon_tx_mode = NO_BEACON_TX; |
---|
1363 | bzero(gl_beacon_txrx_config.bssid_match, MAC_ADDR_LEN); |
---|
1364 | wlan_mac_high_config_txrx_beacon(&gl_beacon_txrx_config); |
---|
1365 | |
---|
1366 | // Set hex display to "No BSS" |
---|
1367 | wlan_platform_high_userio_disp_status(USERIO_DISP_STATUS_MEMBER_LIST_UPDATE, 0xFF); |
---|
1368 | } |
---|
1369 | |
---|
1370 | // (bss_config_update == NULL) is one way to remove the BSS state of the node. This operation |
---|
1371 | // was executed just above. Rather that continuing to check non-NULLness of bss_config |
---|
1372 | // throughout the rest of this function, just re-enable interrupts and return early. |
---|
1373 | |
---|
1374 | if(bss_config == NULL){ |
---|
1375 | wlan_platform_intc_set_state(curr_interrupt_state); |
---|
1376 | return return_status; |
---|
1377 | } |
---|
1378 | |
---|
1379 | // active_bss_info is guaranteed to be NULL at this point in the code |
---|
1380 | // bss_config is guaranteed to be non-NULL at this point in the code |
---|
1381 | |
---|
1382 | // Update BSS |
---|
1383 | // - BSSID must not be zero_addr (reserved address) |
---|
1384 | if (wlan_addr_eq(bss_config->bssid, zero_addr) == 0) { |
---|
1385 | // Stop the scan state machine if it is running |
---|
1386 | if (wlan_mac_scan_is_scanning()) { |
---|
1387 | wlan_mac_scan_stop(); |
---|
1388 | } |
---|
1389 | |
---|
1390 | // Create a new bss_info or overwrite an existing one with matching BSSID. |
---|
1391 | // Note: The wildcard SSID and 0-valued channel arguments are temporary. Because |
---|
1392 | // of the error checking at the top of this function, the bss_config will |
---|
1393 | // contain a valid SSID as well as channel. These fields will be updated |
---|
1394 | // in step 3). |
---|
1395 | local_network_info = wlan_mac_high_create_network_info(bss_config->bssid, "", 0); |
---|
1396 | |
---|
1397 | if(local_network_info != NULL){ |
---|
1398 | local_network_info->flags |= NETWORK_FLAGS_KEEP; |
---|
1399 | local_network_info->capabilities = (BSS_CAPABILITIES_IBSS); |
---|
1400 | active_network_info = local_network_info; |
---|
1401 | } |
---|
1402 | |
---|
1403 | // Set hex display |
---|
1404 | wlan_platform_high_userio_disp_status(USERIO_DISP_STATUS_MEMBER_LIST_UPDATE, active_network_info->members.length); |
---|
1405 | } |
---|
1406 | } |
---|
1407 | |
---|
1408 | //--------------------------------------------------------- |
---|
1409 | // 3. Clean up |
---|
1410 | // Now that active_bss_info has been updated, CPU_HIGH can communicate |
---|
1411 | // the changes to CPU_LOW so that the node is tuned to the correct channel, |
---|
1412 | // send beacons at the correct interval, and update the beacon |
---|
1413 | // template packet buffer. |
---|
1414 | if (active_network_info != NULL) { |
---|
1415 | |
---|
1416 | if (update_mask & BSS_FIELD_MASK_CHAN) { |
---|
1417 | active_network_info->bss_config.chan_spec = bss_config->chan_spec; |
---|
1418 | send_channel_switch_to_low = 1; |
---|
1419 | update_beacon_template = 1; |
---|
1420 | } |
---|
1421 | if (update_mask & BSS_FIELD_MASK_SSID) { |
---|
1422 | strncpy(active_network_info->bss_config.ssid, bss_config->ssid, SSID_LEN_MAX); |
---|
1423 | update_beacon_template = 1; |
---|
1424 | } |
---|
1425 | if (update_mask & BSS_FIELD_MASK_BEACON_INTERVAL) { |
---|
1426 | active_network_info->bss_config.beacon_interval = bss_config->beacon_interval; |
---|
1427 | update_beacon_template = 1; |
---|
1428 | send_beacon_config_to_low = 1; |
---|
1429 | } |
---|
1430 | if (update_mask & BSS_FIELD_MASK_HT_CAPABLE) { |
---|
1431 | // In an IBSS network, the node does not know the HT capabilities of any of |
---|
1432 | // the peer nodes in the BSS. Therefore, when station infos are added to |
---|
1433 | // track peer nodes, the node assumes that the peer node's HT capabilities |
---|
1434 | // matches that of the BSS. Given that changing the BSS capabilities does |
---|
1435 | // not invalidate that assumption, the IBSS node does not update any station |
---|
1436 | // info HT capabilities when the BSS capabilities change. Therefore, |
---|
1437 | // changing the BSS HT_CAPABLE capabilities only affects what is advertised in |
---|
1438 | // the IBSS beacons. Also, it should not change any of the default TX params |
---|
1439 | // since the IBSS node is still capable of sending and receiving HT packets. |
---|
1440 | |
---|
1441 | active_network_info->bss_config.ht_capable = bss_config->ht_capable; |
---|
1442 | |
---|
1443 | // Update the beacon template to match capabilities |
---|
1444 | update_beacon_template = 1; |
---|
1445 | } |
---|
1446 | |
---|
1447 | // Update the beacon template |
---|
1448 | // In the event that CPU_LOW currently has the beacon packet buffer locked, |
---|
1449 | // block for now until it unlocks. This will guarantee that beacon are updated |
---|
1450 | // before the function returns. |
---|
1451 | if (update_beacon_template) { |
---|
1452 | default_beacon_tx_params = wlan_mac_get_default_tx_params(mcast_mgmt); |
---|
1453 | |
---|
1454 | while( wlan_mac_high_configure_beacon_tx_template((u8*)bcast_addr, |
---|
1455 | wlan_mac_addr, |
---|
1456 | active_network_info->bss_config.bssid, |
---|
1457 | active_network_info, |
---|
1458 | &default_beacon_tx_params, |
---|
1459 | TX_FRAME_INFO_FLAGS_FILL_TIMESTAMP | TX_FRAME_INFO_FLAGS_WAIT_FOR_LOCK) != 0 ){} |
---|
1460 | } |
---|
1461 | |
---|
1462 | // Update the channel |
---|
1463 | if (send_channel_switch_to_low) { |
---|
1464 | wlan_mac_high_set_radio_channel( |
---|
1465 | wlan_mac_high_bss_channel_spec_to_radio_chan(active_network_info->bss_config.chan_spec)); |
---|
1466 | } |
---|
1467 | |
---|
1468 | // Update Beacon configuration |
---|
1469 | if (send_beacon_config_to_low) { |
---|
1470 | |
---|
1471 | memcpy(gl_beacon_txrx_config.bssid_match, active_network_info->bss_config.bssid, MAC_ADDR_LEN); |
---|
1472 | |
---|
1473 | if ((active_network_info->bss_config.beacon_interval == BEACON_INTERVAL_NO_BEACON_TX) || |
---|
1474 | (active_network_info->bss_config.beacon_interval == BEACON_INTERVAL_UNKNOWN)) { |
---|
1475 | ((tx_frame_info_t*)CALC_PKT_BUF_ADDR(platform_common_dev_info.tx_pkt_buf_baseaddr, TX_PKT_BUF_BEACON))->tx_pkt_buf_state = TX_PKT_BUF_HIGH_CTRL; |
---|
1476 | gl_beacon_txrx_config.beacon_tx_mode = NO_BEACON_TX; |
---|
1477 | } else { |
---|
1478 | gl_beacon_txrx_config.beacon_tx_mode = IBSS_BEACON_TX; |
---|
1479 | } |
---|
1480 | |
---|
1481 | gl_beacon_txrx_config.beacon_interval_tu = active_network_info->bss_config.beacon_interval; |
---|
1482 | gl_beacon_txrx_config.beacon_template_pkt_buf = TX_PKT_BUF_BEACON; |
---|
1483 | |
---|
1484 | wlan_mac_high_config_txrx_beacon(&gl_beacon_txrx_config); |
---|
1485 | } |
---|
1486 | |
---|
1487 | // Print new IBSS information |
---|
1488 | xil_printf("IBSS Details: \n"); |
---|
1489 | xil_printf(" BSSID : %02x-%02x-%02x-%02x-%02x-%02x\n",active_network_info->bss_config.bssid[0],active_network_info->bss_config.bssid[1], |
---|
1490 | active_network_info->bss_config.bssid[2],active_network_info->bss_config.bssid[3], |
---|
1491 | active_network_info->bss_config.bssid[4],active_network_info->bss_config.bssid[5]); |
---|
1492 | xil_printf(" SSID : %s\n", active_network_info->bss_config.ssid); |
---|
1493 | xil_printf(" Channel : %d\n", wlan_mac_high_bss_channel_spec_to_radio_chan(active_network_info->bss_config.chan_spec)); |
---|
1494 | if (active_network_info->bss_config.beacon_interval == BEACON_INTERVAL_NO_BEACON_TX) { |
---|
1495 | xil_printf(" Beacon Interval: No Beacon Tx\n"); |
---|
1496 | } else if (active_network_info->bss_config.beacon_interval == BEACON_INTERVAL_UNKNOWN) { |
---|
1497 | xil_printf(" Beacon Interval: Unknown\n"); |
---|
1498 | } else { |
---|
1499 | xil_printf(" Beacon Interval: %d TU (%d us)\n", active_network_info->bss_config.beacon_interval, active_network_info->bss_config.beacon_interval*1024); |
---|
1500 | } |
---|
1501 | } |
---|
1502 | |
---|
1503 | // Restore interrupts after all BSS changes |
---|
1504 | wlan_platform_intc_set_state(curr_interrupt_state); |
---|
1505 | } |
---|
1506 | |
---|
1507 | return return_status; |
---|
1508 | } |
---|
1509 | |
---|
1510 | |
---|
1511 | |
---|
1512 | /*****************************************************************************/ |
---|
1513 | /** |
---|
1514 | * @brief Callback to handle beacon MAC time update mode |
---|
1515 | * |
---|
1516 | * @param u32 enable - Enable / Disable MAC time update from beacons |
---|
1517 | * @return None |
---|
1518 | * |
---|
1519 | *****************************************************************************/ |
---|
1520 | void ibss_set_beacon_ts_update_mode(u32 enable){ |
---|
1521 | if (enable) { |
---|
1522 | gl_beacon_txrx_config.ts_update_mode = FUTURE_ONLY_UPDATE; |
---|
1523 | } else { |
---|
1524 | gl_beacon_txrx_config.ts_update_mode = NEVER_UPDATE; |
---|
1525 | } |
---|
1526 | |
---|
1527 | // Push beacon configuration to CPU_LOW |
---|
1528 | wlan_mac_high_config_txrx_beacon(&gl_beacon_txrx_config); |
---|
1529 | } |
---|
1530 | |
---|
1531 | |
---|
1532 | |
---|
1533 | /*****************************************************************************/ |
---|
1534 | /** |
---|
1535 | * @brief Accessor methods for global variables |
---|
1536 | * |
---|
1537 | * These functions will return pointers to global variables |
---|
1538 | * |
---|
1539 | * @param None |
---|
1540 | * @return None |
---|
1541 | *****************************************************************************/ |
---|
1542 | dl_list* get_network_member_list(){ |
---|
1543 | if(active_network_info != NULL){ |
---|
1544 | return &(active_network_info->members); |
---|
1545 | } else { |
---|
1546 | return NULL; |
---|
1547 | } |
---|
1548 | } |
---|
1549 | |
---|
1550 | network_info_t * active_network_info_getter(){ return active_network_info; } |
---|
1551 | |
---|
1552 | |
---|
1553 | #if WLAN_SW_CONFIG_ENABLE_WLAN_EXP |
---|
1554 | |
---|
1555 | // **************************************************************************** |
---|
1556 | // Define MAC Specific User Commands |
---|
1557 | // |
---|
1558 | // NOTE: All User Command IDs (CMDID_*) must be a 24 bit unique number |
---|
1559 | // |
---|
1560 | |
---|
1561 | //----------------------------------------------- |
---|
1562 | // MAC Specific User Commands |
---|
1563 | // |
---|
1564 | // #define CMDID_USER_<COMMAND_NAME> 0x100000 |
---|
1565 | |
---|
1566 | |
---|
1567 | //----------------------------------------------- |
---|
1568 | // MAC Specific User Command Parameters |
---|
1569 | // |
---|
1570 | // #define CMD_PARAM_USER_<PARAMETER_NAME> 0x00000000 |
---|
1571 | |
---|
1572 | |
---|
1573 | |
---|
1574 | /*****************************************************************************/ |
---|
1575 | /** |
---|
1576 | * Process User Commands |
---|
1577 | * |
---|
1578 | * This function is part of the WLAN Exp framework and will process the framework- |
---|
1579 | * level user commands. This function intentionally does not implement any user |
---|
1580 | * commands and it is left to the user to implement any needed functionality. By |
---|
1581 | * default, any commands not processed in this function will print an error to the |
---|
1582 | * UART. |
---|
1583 | * |
---|
1584 | * @return int - Status of the command: |
---|
1585 | * NO_RESP_SENT - No response has been sent |
---|
1586 | * RESP_SENT - A response has been sent |
---|
1587 | * |
---|
1588 | * @note See on-line documentation for more information: |
---|
1589 | * https://warpproject.org/trac/wiki/802.11/wlan_exp/Extending |
---|
1590 | * |
---|
1591 | *****************************************************************************/ |
---|
1592 | int wlan_exp_process_user_cmd(cmd_resp_hdr_t* cmd_hdr, eth_tx_queue_buffer_t* eth_tx_queue_buffer) { |
---|
1593 | |
---|
1594 | // |
---|
1595 | // IMPORTANT ENDIAN NOTES: |
---|
1596 | // - command |
---|
1597 | // - header - Already endian swapped by the framework (safe to access directly) |
---|
1598 | // - args - Must be endian swapped as necessary by code (framework does not know the contents of the command) |
---|
1599 | // - response |
---|
1600 | // - header - Will be endian swapped by the framework (safe to write directly) |
---|
1601 | // - args - Must be endian swapped as necessary by code (framework does not know the contents of the response) |
---|
1602 | // |
---|
1603 | |
---|
1604 | // Standard variables |
---|
1605 | // |
---|
1606 | // Used for accessing command arguments and constructing the command response header/payload |
---|
1607 | // |
---|
1608 | // NOTE: Some of the standard variables below have been commented out. This was to remove |
---|
1609 | // compiler warnings for "unused variables" since the default implementation is empty. As |
---|
1610 | // you add commands, you should un-comment the standard variables. |
---|
1611 | // |
---|
1612 | u32 resp_sent = NO_RESP_SENT; |
---|
1613 | |
---|
1614 | u32 cmd_id = CMD_TO_CMDID(cmd_hdr->cmd); |
---|
1615 | #if 0 |
---|
1616 | // Segment 0 length includes a fully formed command response header |
---|
1617 | // because one was created with default values suitable for a responseless |
---|
1618 | // acknowledgment. |
---|
1619 | cmd_resp_hdr_t* resp_hdr = (cmd_resp_hdr_t*)(eth_tx_queue_buffer->seg0 |
---|
1620 | + eth_tx_queue_buffer->seg0_len |
---|
1621 | - sizeof(cmd_resp_hdr_t)); |
---|
1622 | |
---|
1623 | u32* cmd_args_32 = (u32*)((u8*)cmd_hdr + sizeof(cmd_resp_hdr_t)); |
---|
1624 | #endif |
---|
1625 | |
---|
1626 | switch(cmd_id){ |
---|
1627 | |
---|
1628 | //----------------------------------------------------------------------------- |
---|
1629 | // MAC Specific User Commands |
---|
1630 | //----------------------------------------------------------------------------- |
---|
1631 | |
---|
1632 | // Template framework for a Command |
---|
1633 | // |
---|
1634 | // NOTE: The WLAN Exp framework assumes that the Over-the-Wire format of the data is |
---|
1635 | // big endian. However, the node processes data using little endian. Therefore, |
---|
1636 | // any data received from the host must be properly endian-swapped and similarly, |
---|
1637 | // any data sent to the host must be properly endian-swapped. The built-in Xilinx |
---|
1638 | // functions: Xil_Ntohl() (Network to Host) and Xil_Htonl() (Host to Network) are |
---|
1639 | // used for this. |
---|
1640 | // |
---|
1641 | #if 0 |
---|
1642 | //--------------------------------------------------------------------- |
---|
1643 | case CMDID_USER_<COMMAND_NAME>: { |
---|
1644 | // Command Description |
---|
1645 | // |
---|
1646 | // Message format: |
---|
1647 | // cmd_args_32[0:N] Document command arguments from the host |
---|
1648 | // |
---|
1649 | // Response format: |
---|
1650 | // resp_args_32[0:M] Document response arguments from the node |
---|
1651 | // |
---|
1652 | // NOTE: Variables are declared above. |
---|
1653 | // NOTE: Please take care of the endianness of the arguments (see comment above) |
---|
1654 | // |
---|
1655 | |
---|
1656 | // Variables for template command |
---|
1657 | int status; |
---|
1658 | u32 arg_0; |
---|
1659 | interrupt_state_t curr_interrupt_state; |
---|
1660 | |
---|
1661 | // Initialize variables |
---|
1662 | status = CMD_PARAM_SUCCESS; |
---|
1663 | arg_0 = Xil_Ntohl(cmd_args_32[0]); // Swap endianness of command argument |
---|
1664 | |
---|
1665 | // Do something with argument(s) |
---|
1666 | xil_printf("Command argument 0: 0x%08x\n", arg_0); |
---|
1667 | |
---|
1668 | // If necessary, disable interrupts before processing the command |
---|
1669 | // Interrupts must be disabled if the command implementation relies on any state that might |
---|
1670 | // change during an interrupt service routine. See the user guide for more details |
---|
1671 | // https://warpproject.org/trac/wiki/802.11/wlan_exp/Extending |
---|
1672 | curr_interrupt_state = wlan_platform_intc_stop(); |
---|
1673 | |
---|
1674 | // Process command arguments and generate any response payload |
---|
1675 | // NOTE: If interrupts were disabled above, take care to avoid any long-running code in this |
---|
1676 | // block (i.e. avoid xil_printf()). When interrupts are disabled, CPU High is unable to |
---|
1677 | // respond to CPU Low (ie CPU High will not send / receive packets) and execute scheduled |
---|
1678 | // tasks, such as LTGs. |
---|
1679 | |
---|
1680 | // Re-enable interrupts before returning (only do this if wlan_platform_intc_stop() is called above) |
---|
1681 | wlan_platform_intc_set_state(curr_interrupt_state); |
---|
1682 | |
---|
1683 | // Send response |
---|
1684 | // NOTE: It is good practice to send a status as the first argument of the response. |
---|
1685 | // This way it is easy to determine if the other data in the response is valid. |
---|
1686 | // Predefined status values are: CMD_PARAM_SUCCESS, CMD_PARAM_ERROR |
---|
1687 | // |
---|
1688 | wlan_exp_add_u32_resp_arg(eth_tx_queue_buffer, resp_hdr, status); |
---|
1689 | } |
---|
1690 | break; |
---|
1691 | #endif |
---|
1692 | |
---|
1693 | |
---|
1694 | //--------------------------------------------------------------------- |
---|
1695 | default: { |
---|
1696 | wlan_exp_printf(WLAN_EXP_PRINT_ERROR, print_type_node, "Unknown IBSS user command: 0x%x\n", cmd_id); |
---|
1697 | } |
---|
1698 | break; |
---|
1699 | } |
---|
1700 | |
---|
1701 | return resp_sent; |
---|
1702 | } |
---|
1703 | |
---|
1704 | #endif |
---|
1705 | |
---|