[6319] | 1 | /** @file wlan_mac_ap.c |
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| 2 | * @brief Access Point |
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| 3 | * |
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| 4 | * This contains code for the 802.11 Access Point. |
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| 5 | * |
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| 6 | * @copyright Copyright 2013-2019, Mango Communications. All rights reserved. |
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| 7 | * Distributed under the Mango Communications Reference Design License |
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| 8 | * See LICENSE.txt included in the design archive or |
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| 9 | * at http://mangocomm.com/802.11/license |
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| 10 | * |
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| 11 | * This file is part of the Mango 802.11 Reference Design (https://mangocomm.com/802.11) |
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| 12 | */ |
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| 13 | |
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| 14 | // Xilinx SDK includes |
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| 15 | #include "stdlib.h" |
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| 16 | #include "string.h" |
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| 17 | #include "xil_cache.h" |
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| 18 | // 802.11 ref design headers |
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| 19 | #include "wlan_mac_high_sw_config.h" |
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| 20 | #include "wlan_mac_common.h" |
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| 21 | #include "wlan_platform_common.h" |
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| 22 | #include "wlan_platform_high.h" |
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| 23 | |
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| 24 | #include "wlan_mac_high.h" |
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| 25 | #include "wlan_mac_ap.h" |
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| 26 | #include "wlan_mac_addr_filter.h" |
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| 27 | #include "wlan_mac_ltg.h" |
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| 28 | #include "wlan_mac_event_log.h" |
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| 29 | #include "wlan_mac_schedule.h" |
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| 30 | #include "wlan_mac_queue.h" |
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| 31 | #include "wlan_mac_802_11_defs.h" |
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| 32 | #include "wlan_mac_packet_types.h" |
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| 33 | #include "wlan_mac_network_info.h" |
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| 34 | #include "wlan_mac_station_info.h" |
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| 35 | #include "wlan_mac_mgmt_tags.h" |
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| 36 | #include "wlan_mac_eth_util.h" |
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| 37 | #include "wlan_mac_scan.h" |
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| 38 | #include "wlan_mac_pkt_buf_util.h" |
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| 39 | #include "wlan_mac_entries.h" |
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| 40 | #include "wlan_mac_dl_list.h" |
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| 41 | |
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| 42 | #include "wlan_exp.h" |
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| 43 | #include "wlan_exp_node.h" |
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| 44 | #include "wlan_exp_node_ap.h" |
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| 45 | #include "wlan_exp_transport.h" |
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| 46 | |
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| 47 | |
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| 48 | /*************************** Constant Definitions ****************************/ |
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| 49 | |
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| 50 | #define WLAN_DEFAULT_BSS_CONFIG_CHANNEL 1 |
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| 51 | #define WLAN_DEFAULT_BSS_CONFIG_DTIM_PERIOD 2 |
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| 52 | #define WLAN_DEFAULT_BSS_CONFIG_BEACON_INTERVAL 100 |
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| 53 | // The WLAN_DEFAULT_BSS_CONFIG_HT_CAPABLE define will set the default |
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| 54 | // unicast TX phy mode to: 1 --> HTMF or 0 --> NONHT. |
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| 55 | #define WLAN_DEFAULT_BSS_CONFIG_HT_CAPABLE 1 |
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| 56 | |
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| 57 | #define WLAN_DEFAULT_TX_PWR 15 |
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| 58 | #define WLAN_DEFAULT_TX_ANTENNA TX_ANTMODE_SISO_ANTA |
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| 59 | #define WLAN_DEFAULT_RX_ANTENNA RX_ANTMODE_SISO_ANTA |
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| 60 | |
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| 61 | |
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| 62 | /*********************** Global Variable Definitions *************************/ |
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| 63 | |
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| 64 | |
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| 65 | /*************************** Variable Definitions ****************************/ |
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| 66 | |
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| 67 | // SSID variables |
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| 68 | static char default_AP_SSID[] = "MANGO-AP"; |
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| 69 | |
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| 70 | // "active_network_info" is a pointer to the network_info that describes this AP. |
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| 71 | // Inside this structure is a dl_list of members. This is a list |
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| 72 | // of all stations that are currently associated with this AP. In the |
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| 73 | // 802.11-2012 Section 10.3 parlance, these stations are currently |
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| 74 | // in State 4 (Authenticated, Associated). As part of the association |
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| 75 | // process, we want to track stations as they transition through the |
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| 76 | // 10.3 states. To do this, we'll create a totally separate dl_list of |
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| 77 | // station_info that represent stations in State 2 |
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| 78 | // (Authenticated, Unassociated). Only members of this list will be allowed |
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| 79 | // to elevate to State 4 in the active_bss_info. |
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| 80 | network_info_t* active_network_info; |
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| 81 | |
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| 82 | dl_list authenticated_unassociated_stations; |
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| 83 | |
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| 84 | // Tx queue variables; |
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| 85 | u32 max_queue_size; |
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| 86 | volatile u8 pause_data_queue; |
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| 87 | |
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| 88 | // MAC address |
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| 89 | static u8 wlan_mac_addr[MAC_ADDR_LEN]; |
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| 90 | |
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| 91 | // Traffic Indication Map (TIM) State |
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| 92 | // These global structs must be protected against externing. Any |
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| 93 | // modifications of these structs should be done via an explicit |
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| 94 | // setter that also updates the beacon template. |
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| 95 | static volatile mgmt_tag_template_t* mgmt_tag_tim_template; |
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| 96 | static volatile u32 mgmt_tag_tim_update_schedule_id; |
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| 97 | |
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| 98 | // Beacon configuration |
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| 99 | static beacon_txrx_config_t gl_beacon_txrx_config; |
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| 100 | |
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| 101 | // Static QIDs |
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| 102 | u16 mcast_qid; |
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| 103 | u16 mgmt_qid; |
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| 104 | |
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| 105 | // DTIM Multicast Buffer |
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| 106 | u8 gl_dtim_mcast_buffer_enable; // Enable buffering of multicast packets until after DTIM transmission |
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| 107 | u8 gl_cpu_low_supports_dtim_mcast; // Flag to indicate if DTIM multicast buffering is supported by the low-level MAC |
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| 108 | |
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| 109 | // Common Platform Device Info |
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| 110 | platform_common_dev_info_t platform_common_dev_info; |
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| 111 | |
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| 112 | /*************************** Functions Prototypes ****************************/ |
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| 113 | |
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| 114 | #if WLAN_SW_CONFIG_ENABLE_WLAN_EXP |
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| 115 | 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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| 116 | #endif |
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| 117 | |
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| 118 | |
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| 119 | /******************************** Functions **********************************/ |
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| 120 | |
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| 121 | int main(){ |
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| 122 | |
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| 123 | // Call the platform-supplied cpu_init() first to setup any |
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| 124 | // processor-specific settings to enable sane execution |
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| 125 | // of the platform and framework code below |
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| 126 | wlan_platform_cpu_high_init(); |
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| 127 | |
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| 128 | u32 update_mask; |
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| 129 | bss_config_t bss_config; |
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| 130 | |
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| 131 | xil_printf("\f"); |
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| 132 | xil_printf("----- Mango 802.11 Reference Design -----\n"); |
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| 133 | xil_printf("----- v1.8.0 ----------------------------\n"); |
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| 134 | xil_printf("----- wlan_mac_ap -----------------------\n"); |
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| 135 | |
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| 136 | xil_printf("Compiled %s %s\n\n", __DATE__, __TIME__); |
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| 137 | |
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| 138 | // Heap Initialization |
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| 139 | // The heap must be initialized before any use of malloc. This explicit |
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| 140 | // init handles the case of soft-reset of the MicroBlaze leaving stale |
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| 141 | // values in the heap RAM |
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| 142 | wlan_mac_common_malloc_init(); |
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| 143 | |
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| 144 | //Initialize the MAC framework |
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| 145 | wlan_mac_high_init(); |
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| 146 | |
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| 147 | // Get the device info |
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| 148 | platform_common_dev_info = wlan_platform_common_get_dev_info(); |
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| 149 | |
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| 150 | // Before any queue entries are used, calculate the maximum number of |
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| 151 | // allowed enqueues based on the number that are free |
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| 152 | max_queue_size = WLAN_MIN( queue_num_free(), MAX_TX_QUEUE_LEN ); |
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| 153 | |
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| 154 | // Open static queues for multicast and management frames |
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| 155 | // We will use a single queue for all multicast frames. The occupancy of this |
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| 156 | // queue will be reflecting in the TIM tag in beacons, so we must attach a |
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| 157 | // function callback to be notified when the queue changes |
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| 158 | mcast_qid = queue_open((void*)queue_state_change, 0, max_queue_size); |
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| 159 | |
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| 160 | // We will use a queue for unicast management frames that are not addressed |
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| 161 | // to associated stations (e.g. a unicast probe response to a station |
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| 162 | // performing an active scan). Because there is no AID fo an unassociated |
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| 163 | // station, we do not need to be notified of occupancy changes for this |
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| 164 | // queue. So, we will attach the default null callback in the framework. |
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| 165 | mgmt_qid = queue_open((void*)wlan_null_callback, 0, max_queue_size); |
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| 166 | |
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| 167 | pause_data_queue = 0; |
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| 168 | |
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| 169 | gl_cpu_low_supports_dtim_mcast = 0; |
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| 170 | |
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| 171 | //Set a sane default for the TIM tag byte offset |
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| 172 | gl_beacon_txrx_config.dtim_tag_byte_offset = 0; |
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| 173 | |
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| 174 | // AP does not currently advertise a BSS |
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| 175 | configure_bss(NULL, 0); |
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| 176 | |
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| 177 | // Initialize hex display to "No BSS" |
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| 178 | wlan_platform_high_userio_disp_status(USERIO_DISP_STATUS_MEMBER_LIST_UPDATE, 0xFF); |
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| 179 | |
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| 180 | // Set default Tx params |
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| 181 | // Set sane default Tx params. These will be overwritten by the user application |
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| 182 | 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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| 183 | .mac = { .flags = 0 } }; |
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| 184 | |
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| 185 | wlan_mac_set_default_tx_params(unicast_data, &tx_params); |
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| 186 | |
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| 187 | tx_params.phy.mcs = 0; |
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| 188 | tx_params.phy.phy_mode = PHY_MODE_NONHT; |
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| 189 | |
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| 190 | wlan_mac_set_default_tx_params(unicast_mgmt, &tx_params); |
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| 191 | wlan_mac_set_default_tx_params(mcast_data, &tx_params); |
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| 192 | wlan_mac_set_default_tx_params(mcast_mgmt, &tx_params); |
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| 193 | |
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| 194 | // Re-apply the defaults to any existing station_info_t structs that this AP |
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| 195 | // knows about |
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| 196 | wlan_mac_reapply_default_tx_params(); |
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| 197 | |
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| 198 | // Initialize callbacks |
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| 199 | #if WLAN_SW_CONFIG_ENABLE_ETH_BRIDGE |
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| 200 | wlan_mac_util_set_eth_rx_callback((void*)ethernet_receive); |
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| 201 | #endif |
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| 202 | wlan_mac_high_set_mpdu_rx_callback((void*)mpdu_rx_process); |
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| 203 | wlan_mac_high_set_press_pb_0_callback((void*)button_0_press); |
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| 204 | wlan_mac_high_set_release_pb_0_callback((void*)button_0_release); |
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| 205 | wlan_mac_high_set_uart_rx_callback((void*)uart_rx); |
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| 206 | wlan_mac_high_set_poll_tx_queues_callback((void*)poll_tx_queues); |
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| 207 | wlan_mac_high_set_mpdu_dequeue_callback((void*)mpdu_dequeue); |
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| 208 | #if WLAN_SW_CONFIG_ENABLE_LTG |
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| 209 | wlan_mac_ltg_sched_set_callback((void*)ltg_event); |
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| 210 | #endif //WLAN_SW_CONFIG_ENABLE_LTG |
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| 211 | wlan_mac_scan_set_state_change_callback((void*)process_scan_state_change); |
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| 212 | wlan_mac_high_set_cpu_low_reboot_callback((void*)handle_cpu_low_reboot); |
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| 213 | wlan_mac_high_set_tx_queue_state_change_callback((void*)queue_state_change); |
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| 214 | |
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| 215 | #if WLAN_SW_CONFIG_ENABLE_WLAN_EXP |
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| 216 | |
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| 217 | // NOTE: To use the WLAN Experiments Framework, it must be initialized after |
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| 218 | // CPU low has populated the hw_info structure in the MAC High framework. |
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| 219 | |
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| 220 | // Initialize WLAN Exp |
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| 221 | wlan_exp_node_init(); |
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| 222 | |
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| 223 | // Set WLAN Exp callbacks |
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| 224 | wlan_exp_set_process_node_cmd_callback((void *) process_wlan_exp_app_cmd); |
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| 225 | wlan_exp_set_purge_all_wireless_tx_queue_callback((void *) purge_all_wireless_tx_queue); |
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| 226 | wlan_exp_set_process_user_cmd_callback((void *) wlan_exp_process_user_cmd); |
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| 227 | // - wlan_exp_set_beacon_ts_update_mode_callback() currently not supported by the AP |
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| 228 | wlan_exp_set_process_config_bss_callback((void *) configure_bss); |
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| 229 | wlan_exp_set_active_network_info_getter_callback((void *) active_network_info_getter); |
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| 230 | |
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| 231 | // Set CPU_HIGH Type in wlan_exp's node_info struct; |
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| 232 | wlan_exp_node_set_type_high(APPLICATION_ROLE_AP, __DATE__, __TIME__); |
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| 233 | |
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| 234 | #endif |
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| 235 | |
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| 236 | memcpy((void*) &(wlan_mac_addr[0]), (void*) get_mac_hw_addr_wlan(), MAC_ADDR_LEN); |
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| 237 | |
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| 238 | // Set the at-boot MAC Time to 0 usec |
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| 239 | set_mac_time_usec(0); |
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| 240 | |
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| 241 | wlan_mac_high_set_radio_channel(WLAN_DEFAULT_BSS_CONFIG_CHANNEL); |
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| 242 | wlan_mac_high_set_rx_ant_mode(WLAN_DEFAULT_RX_ANTENNA); |
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| 243 | wlan_mac_high_set_tx_ctrl_power(WLAN_DEFAULT_TX_PWR); |
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| 244 | wlan_mac_high_set_radio_tx_power(WLAN_DEFAULT_TX_PWR); |
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| 245 | |
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| 246 | // Initialize TIM management tag that will be postpended to a beacon |
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| 247 | mgmt_tag_tim_update_schedule_id = SCHEDULE_ID_RESERVED_MAX; |
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| 248 | mgmt_tag_tim_template = NULL; |
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| 249 | |
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| 250 | // Periodic check for timed-out associations |
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| 251 | wlan_mac_schedule_add_event(SCHEDULE_ID_COARSE, ASSOCIATION_CHECK_INTERVAL_US, SCHEDULE_REPEAT_FOREVER, (void*)remove_inactive_station_infos); |
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| 252 | |
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| 253 | wlan_platform_high_userio_disp_status(USERIO_DISP_STATUS_APPLICATION_ROLE, APPLICATION_ROLE_AP); |
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| 254 | |
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| 255 | #if WLAN_SW_CONFIG_ENABLE_LOGGING |
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| 256 | // Reset the event log |
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| 257 | event_log_reset(); |
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| 258 | #endif //WLAN_SW_CONFIG_ENABLE_LOGGING |
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| 259 | |
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| 260 | // If the DIP switch allows it, set up BSS description |
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| 261 | if ((wlan_platform_userio_get_state() & USERIO_INPUT_MASK_SW_3) == 0) { |
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| 262 | memcpy(bss_config.bssid, wlan_mac_addr, MAC_ADDR_LEN); |
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| 263 | strncpy(bss_config.ssid, default_AP_SSID, SSID_LEN_MAX); |
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| 264 | |
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| 265 | bss_config.chan_spec.chan_pri = WLAN_DEFAULT_BSS_CONFIG_CHANNEL; |
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| 266 | bss_config.chan_spec.chan_type = CHAN_TYPE_BW20; |
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| 267 | bss_config.ht_capable = WLAN_DEFAULT_BSS_CONFIG_HT_CAPABLE; |
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| 268 | bss_config.beacon_interval = WLAN_DEFAULT_BSS_CONFIG_BEACON_INTERVAL; |
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| 269 | bss_config.dtim_period = WLAN_DEFAULT_BSS_CONFIG_DTIM_PERIOD; |
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| 270 | |
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| 271 | update_mask = (BSS_FIELD_MASK_BSSID | |
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| 272 | BSS_FIELD_MASK_CHAN | |
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| 273 | BSS_FIELD_MASK_SSID | |
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| 274 | BSS_FIELD_MASK_BEACON_INTERVAL | |
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| 275 | BSS_FIELD_MASK_HT_CAPABLE | |
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| 276 | BSS_FIELD_MASK_DTIM_PERIOD); |
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| 277 | configure_bss(&bss_config, update_mask); |
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| 278 | } |
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| 279 | |
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| 280 | gl_dtim_mcast_buffer_enable = 1; |
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| 281 | wlan_mac_high_enable_mcast_buffering(gl_dtim_mcast_buffer_enable); |
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| 282 | |
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| 283 | // Print AP information to the terminal |
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| 284 | |
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| 285 | xil_printf("------------------------\n"); |
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| 286 | xil_printf("WLAN MAC AP boot complete\n"); |
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| 287 | |
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| 288 | #ifdef WLAN_USE_UART_MENU |
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| 289 | xil_printf("\nPress the Esc key in your terminal to access the UART menu\n"); |
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| 290 | #endif |
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| 291 | |
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| 292 | // Finally enable all interrupts to start handling wireless and wired traffic |
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| 293 | wlan_platform_intc_set_state(INTERRUPTS_ENABLED); |
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| 294 | |
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| 295 | while(1) { |
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| 296 | wlan_mac_poll(); |
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| 297 | } |
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| 298 | |
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| 299 | // Unreachable, but non-void return keeps the compiler happy |
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| 300 | return WLAN_FAILURE; |
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| 301 | } |
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| 302 | |
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| 303 | |
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| 304 | /*****************************************************************************/ |
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| 305 | /** |
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| 306 | * @brief Handle state change in the network scanner |
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| 307 | * |
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| 308 | * This function is part of the scan infrastructure and will be called whenever |
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| 309 | * the scanner is started, stopped, paused, or resumed. This allows the STA |
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| 310 | * to revert the channel to a known-good state when the scanner has stopped and |
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| 311 | * also serves as notification to the project that it should stop dequeueing data |
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| 312 | * frames since it might be on a different channel than its intended recipient. |
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| 313 | * |
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| 314 | * @param None |
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| 315 | * @return None |
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| 316 | * |
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| 317 | *****************************************************************************/ |
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| 318 | void process_scan_state_change(scan_state_t scan_state){ |
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| 319 | |
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| 320 | // ------------------------------------------------------------------------ |
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| 321 | // Note on scanning: |
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| 322 | // |
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| 323 | // Currently, scanning should only be done with active_bss_info = NULL, ie the |
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| 324 | // node is not currently in a BSS. This is to avoid any corner cases. The |
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| 325 | // AP needs to do the following things to make scanning safe when active_bss_info |
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| 326 | // is not NULL: |
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| 327 | // |
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| 328 | // - Pause outgoing data queues |
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| 329 | // - Pause beacon transmissions in CPU_LOW |
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| 330 | // - Refuse to enqueue probe responses when a probe request is received off channel |
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| 331 | // - Pause dequeue of probe responses when off channel |
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| 332 | // - Note: Currently, this is difficult because probe responses share a |
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| 333 | // queue with probe requests which are needed for active scans |
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| 334 | // |
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| 335 | // ------------------------------------------------------------------------ |
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| 336 | |
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| 337 | switch(scan_state){ |
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| 338 | case SCAN_IDLE: |
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| 339 | case SCAN_PAUSED: |
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| 340 | pause_data_queue = 0; |
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| 341 | if(active_network_info != NULL){ |
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| 342 | wlan_mac_high_set_radio_channel( |
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| 343 | wlan_mac_high_bss_channel_spec_to_radio_chan(active_network_info->bss_config.chan_spec)); |
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| 344 | } |
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| 345 | break; |
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| 346 | case SCAN_RUNNING: |
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| 347 | pause_data_queue = 1; |
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| 348 | break; |
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| 349 | } |
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| 350 | } |
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| 351 | |
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| 352 | /*****************************************************************************/ |
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| 353 | /** |
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| 354 | * @brief Handle queue occupancy change |
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| 355 | * |
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| 356 | * Beacons must contain a TIM tag that dedicates one bit per associated station |
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| 357 | * that indicates whether any downlink traffic is enqueued for that station. |
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| 358 | * This allows stations to save power by dozing during beacon intervals and wake |
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| 359 | * up only when they know downlink traffic is ready for them |
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| 360 | * |
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| 361 | * This function can be attached to a queue so that is called whenever the queue |
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| 362 | * transitions from empty to 1 packet or vice versa. |
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| 363 | * |
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| 364 | * @param u32 aid - the framework will call this function with the callback |
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| 365 | * argument provided during queue_open(). This application |
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| 366 | * chooses to let that argument be the AID for that queue |
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| 367 | * @param u32 queue_len - 0 if the queue is now empty, 1 if the queue now has |
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| 368 | * a single entry |
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| 369 | * @return None |
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| 370 | *****************************************************************************/ |
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| 371 | void queue_state_change(u32 aid, u32 queue_len){ |
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| 372 | //queue_len will take on a value of 0 or 1 |
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| 373 | //and represents the state of the queue after the state |
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| 374 | //changes. |
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| 375 | |
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| 376 | if(mgmt_tag_tim_update_schedule_id != SCHEDULE_ID_RESERVED_MAX){ |
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| 377 | //We already have a pending full TIM state re-write scheduled, so we won't bother |
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| 378 | //with a per-queue change. |
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| 379 | return; |
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| 380 | } |
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| 381 | |
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| 382 | if(mgmt_tag_tim_template == NULL){ |
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| 383 | //The TIM tag is not present in the current beacon template. |
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| 384 | //We have no choice but to do a full TIM tag update and write. |
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| 385 | update_tim_tag_all(SCHEDULE_ID_RESERVED_MAX); |
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| 386 | } else { |
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| 387 | //There is a TIM tag that is already present. We can update |
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| 388 | //only the relevant byte that applies to this queue state |
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| 389 | //change |
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| 390 | update_tim_tag_aid(aid, queue_len); |
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| 391 | } |
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| 392 | } |
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| 393 | |
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| 394 | |
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| 395 | |
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| 396 | /*****************************************************************************/ |
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| 397 | /** |
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| 398 | * |
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| 399 | *****************************************************************************/ |
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| 400 | inline void update_tim_tag_aid(u8 aid, u8 bit_val_in){ |
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| 401 | |
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| 402 | // The intention of this function is to modify as little of an existing TIM |
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| 403 | // tag in the beacon template packet buffer as possible to reduce the amount |
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| 404 | // of time that CPU could be waiting on the packet buffer to be unlocked. |
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| 405 | // |
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| 406 | //Note: AID = 0 is invalid. And input of 0 to this function |
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| 407 | //indicates that the multicast bit in the tim_control byte should |
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| 408 | //be modified if DTIM mcast buffering is currently disabled. Otherwise, |
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| 409 | //CPU_LOW will maintain this bit. |
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| 410 | |
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| 411 | u32 existing_mgmt_tag_length = 0; // Size of the management tag that is currently in the packet buffer |
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| 412 | u8 tim_control = 0; |
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| 413 | u16 tim_byte_idx = 0; |
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| 414 | u8 tim_bit_idx = 0; |
---|
| 415 | u8 bit_val = (bit_val_in & 1); |
---|
| 416 | tx_frame_info_t* tx_frame_info = (tx_frame_info_t*)CALC_PKT_BUF_ADDR(platform_common_dev_info.tx_pkt_buf_baseaddr, TX_PKT_BUF_BEACON); |
---|
| 417 | |
---|
| 418 | if(active_network_info == NULL) return; |
---|
| 419 | if( ((aid==0) && (gl_dtim_mcast_buffer_enable == 1)) ) return; |
---|
| 420 | |
---|
| 421 | //First, we should determine whether a call to update_tim_tag_all_tag_all is scheduled |
---|
| 422 | //for some time in the future. If it is, we can just return immediately and let that |
---|
| 423 | //execution clean up any pending TIM state changes. |
---|
| 424 | if(mgmt_tag_tim_update_schedule_id != SCHEDULE_ID_RESERVED_MAX){ |
---|
| 425 | return; |
---|
| 426 | } |
---|
| 427 | |
---|
| 428 | if(mgmt_tag_tim_template == NULL){ |
---|
| 429 | //There currently isn't any TIM tag in the packet buffer, which means |
---|
| 430 | //that we need to restore the full state and not toggle a single |
---|
| 431 | //bit |
---|
| 432 | update_tim_tag_all(SCHEDULE_ID_RESERVED_MAX); |
---|
| 433 | return; |
---|
| 434 | } |
---|
| 435 | |
---|
| 436 | //There exists a TIM tag in the beacon. We should determine its length |
---|
| 437 | existing_mgmt_tag_length = mgmt_tag_tim_template->header.tag_length; |
---|
| 438 | tim_byte_idx = aid / 8; |
---|
| 439 | |
---|
| 440 | if((tim_byte_idx + 4U) > existing_mgmt_tag_length){ |
---|
| 441 | //The current byte we intend to modify is larger than the existing tag. In this case, |
---|
| 442 | //we fall back on the update_tim_tag_all function since we cannnot simply modify a single |
---|
| 443 | //bit. |
---|
| 444 | update_tim_tag_all(SCHEDULE_ID_RESERVED_MAX); |
---|
| 445 | return; |
---|
| 446 | } |
---|
| 447 | |
---|
| 448 | if( ((tx_frame_info->tx_pkt_buf_state != TX_PKT_BUF_READY) && (tx_frame_info->tx_pkt_buf_state != TX_PKT_BUF_HIGH_CTRL) ) || (lock_tx_pkt_buf(TX_PKT_BUF_BEACON) != PKT_BUF_MUTEX_SUCCESS)){ |
---|
| 449 | //Note: The order of operations in the above if() clause is important. If the tx_pkt_buf_state is not ready. |
---|
| 450 | //then we should not even attempt to lock the beacon template packet buffer. This behavior is ensured if |
---|
| 451 | //the tx_pkt_buf_state is checked on on the left-hand side of the || because the || operation is a sequence |
---|
| 452 | //point in C. |
---|
| 453 | |
---|
| 454 | //CPU_LOW currently has the beacon packet buffer locked, which means that it is actively |
---|
| 455 | //transmitting the beacon and it is not safe to modify the contents of the packet. We will |
---|
| 456 | //use the scheduler to call update_tim_tag_all() sometime later when it is likely that the |
---|
| 457 | //packet buffer is no longer locked. |
---|
| 458 | mgmt_tag_tim_update_schedule_id = wlan_mac_schedule_add_event(SCHEDULE_ID_FINE, |
---|
| 459 | (active_network_info->bss_config.beacon_interval * BSS_MICROSECONDS_IN_A_TU) / 4, |
---|
| 460 | 1, |
---|
| 461 | (void*)update_tim_tag_all); |
---|
| 462 | return; |
---|
| 463 | } |
---|
| 464 | |
---|
| 465 | // If we have made it this far into the function, then we know that the TIM tag currently |
---|
| 466 | // exists in the beacon template packet buffer, the mgmt_tag_tim_template is non-NULL, and |
---|
| 467 | // finally that the TIM tag is long enough that we can simply modify bit(s) that correspond |
---|
| 468 | // to the AID argument of the function. |
---|
| 469 | |
---|
| 470 | if(aid == 0){ |
---|
| 471 | if(bit_val){ |
---|
| 472 | tim_control |= 0x01; //Raise the multicast bit in the TIM control field |
---|
| 473 | mgmt_tag_tim_template->data[2] = tim_control; //TIM Control (top 7 bits are offset for partial map) |
---|
| 474 | mgmt_tag_tim_template->data[3] |= tim_control&1; //Per 10.2.1.3 in 802.11-2012: AID 0 is treated as |
---|
| 475 | //the multicast buffer state |
---|
| 476 | } else { |
---|
| 477 | tim_control = 0; |
---|
| 478 | mgmt_tag_tim_template->data[2] = tim_control; //TIM Control (top 7 bits are offset for partial map) |
---|
| 479 | mgmt_tag_tim_template->data[3] &= ~(tim_control&1); //Per 10.2.1.3 in 802.11-2012: AID 0 is treated as |
---|
| 480 | //the multicast buffer state |
---|
| 481 | } |
---|
| 482 | } else { |
---|
| 483 | if(bit_val){ |
---|
| 484 | mgmt_tag_tim_template->data[3+tim_byte_idx] |= 1<<tim_bit_idx; |
---|
| 485 | } else { |
---|
| 486 | mgmt_tag_tim_template->data[3+tim_byte_idx] &= ~(1<<tim_bit_idx); |
---|
| 487 | } |
---|
| 488 | } |
---|
| 489 | |
---|
| 490 | if(unlock_tx_pkt_buf(TX_PKT_BUF_BEACON) != PKT_BUF_MUTEX_SUCCESS){ |
---|
| 491 | xil_printf("Error: Unable to unlock Beacon packet buffer during update_tim_tag_all\n"); |
---|
| 492 | } |
---|
| 493 | return; |
---|
| 494 | |
---|
| 495 | } |
---|
| 496 | |
---|
| 497 | |
---|
| 498 | |
---|
| 499 | /*****************************************************************************/ |
---|
| 500 | /** |
---|
| 501 | * |
---|
| 502 | *****************************************************************************/ |
---|
| 503 | void update_tim_tag_all(u32 sched_id){ |
---|
| 504 | |
---|
| 505 | tx_frame_info_t* tx_frame_info = (tx_frame_info_t*)CALC_PKT_BUF_ADDR(platform_common_dev_info.tx_pkt_buf_baseaddr, TX_PKT_BUF_BEACON); |
---|
| 506 | u32 existing_mgmt_tag_length = 0; // Size of the management tag that is currently in the packet buffer |
---|
| 507 | u32 next_mgmt_tag_length = 0; // Size that we will update the management tag to be. |
---|
| 508 | // Note: a third size we have to track is present in the global mgmt_tag_tim |
---|
| 509 | station_info_entry_t* curr_station_entry; |
---|
| 510 | station_info_t* station_info; |
---|
| 511 | u8 tim_control; |
---|
| 512 | u32 i; |
---|
| 513 | u16 tim_byte_idx = 0; |
---|
| 514 | u16 tim_next_byte_idx = 0; |
---|
| 515 | u8 tim_bit_idx = 0; |
---|
| 516 | |
---|
| 517 | if(active_network_info == NULL) return; |
---|
| 518 | if(sched_id == SCHEDULE_ID_RESERVED_MAX){ |
---|
| 519 | //This function was called manually (not via the scheduler) |
---|
| 520 | |
---|
| 521 | //First, we should determine whether a call to update_tim_tag_all is scheduled |
---|
| 522 | //for some time in the future. If it is, we can just return immediately and let that |
---|
| 523 | //execution clean up any pending TIM state changes. |
---|
| 524 | if(mgmt_tag_tim_update_schedule_id != SCHEDULE_ID_RESERVED_MAX){ |
---|
| 525 | return; |
---|
| 526 | } |
---|
| 527 | } |
---|
| 528 | |
---|
| 529 | mgmt_tag_tim_update_schedule_id = SCHEDULE_ID_RESERVED_MAX; |
---|
| 530 | |
---|
| 531 | if( ((tx_frame_info->tx_pkt_buf_state != TX_PKT_BUF_READY) && (tx_frame_info->tx_pkt_buf_state != TX_PKT_BUF_HIGH_CTRL) ) || (lock_tx_pkt_buf(TX_PKT_BUF_BEACON) != PKT_BUF_MUTEX_SUCCESS)){ |
---|
| 532 | //Note: The order of operations in the above if() clause is important. If the tx_pkt_buf_state is not ready. |
---|
| 533 | //then we should not even attempt to lock the beacon template packet buffer. This behavior is ensured if |
---|
| 534 | //the tx_pkt_buf_state is checked on on the left-hand side of the || because the || operation is a sequence |
---|
| 535 | //point in C. |
---|
| 536 | |
---|
| 537 | //CPU_LOW currently has the beacon packet buffer locked, which means that it is actively |
---|
| 538 | //transmitting the beacon and it is not safe to modify the contents of the packet. We will |
---|
| 539 | //use the scheduler to call update_tim_tag_all() sometime later when it is likely that the |
---|
| 540 | //packet buffer is no longer locked. |
---|
| 541 | mgmt_tag_tim_update_schedule_id = wlan_mac_schedule_add_event(SCHEDULE_ID_FINE, |
---|
| 542 | (active_network_info->bss_config.beacon_interval * BSS_MICROSECONDS_IN_A_TU) / 4, |
---|
| 543 | 1, |
---|
| 544 | (void*)update_tim_tag_all); |
---|
| 545 | return; |
---|
| 546 | } |
---|
| 547 | |
---|
| 548 | if(mgmt_tag_tim_template != NULL){ |
---|
| 549 | //There exists a TIM tag in the beacon. We should determine its length |
---|
| 550 | existing_mgmt_tag_length = mgmt_tag_tim_template->header.tag_length; |
---|
| 551 | } |
---|
| 552 | |
---|
| 553 | //---------------------------------- |
---|
| 554 | // 1. We will refresh the full state of the TIM tag based upon queue occupancy |
---|
| 555 | |
---|
| 556 | //We'll start updating the TIM tag from the last associated station. |
---|
| 557 | //Since we know that the WLAN MAC High Framework keeps the dl_list of |
---|
| 558 | //associated stations in increasing AID order, we can use this final |
---|
| 559 | //station's AID to define the size of the TIM tag. |
---|
| 560 | curr_station_entry = (station_info_entry_t*)(active_network_info->members.last); |
---|
| 561 | |
---|
| 562 | if(curr_station_entry != NULL){ |
---|
| 563 | station_info = (station_info_t*)(curr_station_entry->data); |
---|
| 564 | next_mgmt_tag_length = 4 + ((station_info->ID) / 8); |
---|
| 565 | } else { |
---|
| 566 | next_mgmt_tag_length = 4; |
---|
| 567 | } |
---|
| 568 | |
---|
| 569 | if(mgmt_tag_tim_template == NULL){ |
---|
| 570 | //We need to add the tag to the end of the beacon template |
---|
| 571 | //and update the length field of the tx_frame_info. |
---|
| 572 | mgmt_tag_tim_template = (mgmt_tag_template_t*)((void*)(tx_frame_info) |
---|
| 573 | +PHY_TX_PKT_BUF_MPDU_OFFSET |
---|
| 574 | +tx_frame_info->length |
---|
| 575 | -WLAN_PHY_FCS_NBYTES); |
---|
| 576 | gl_beacon_txrx_config.dtim_tag_byte_offset = (u16)((u32)mgmt_tag_tim_template - (u32)tx_frame_info); |
---|
| 577 | |
---|
| 578 | mgmt_tag_tim_template->header.tag_element_id = MGMT_TAG_TIM; |
---|
| 579 | tx_frame_info->length += sizeof(mgmt_tag_header); |
---|
| 580 | } |
---|
| 581 | |
---|
| 582 | mgmt_tag_tim_template->header.tag_length = next_mgmt_tag_length; |
---|
| 583 | |
---|
| 584 | tim_control = 0; //The top 7 bits are an offset for the partial map |
---|
| 585 | |
---|
| 586 | if((gl_dtim_mcast_buffer_enable == 0) && (queue_length(mcast_qid)>0)){ |
---|
| 587 | //If mcast buffering is disabled, the AP is responsible for maintaining the |
---|
| 588 | //mcast bit in the TIM control |
---|
| 589 | tim_control |= 0x01; //Raise the multicast bit in the TIM control field |
---|
| 590 | } |
---|
| 591 | |
---|
| 592 | curr_station_entry = (station_info_entry_t*)(active_network_info->members.first); |
---|
| 593 | while(curr_station_entry != NULL){ |
---|
| 594 | station_info = (station_info_t*)(curr_station_entry->data); |
---|
| 595 | |
---|
| 596 | if(queue_length(station_info->QID)){ |
---|
| 597 | tim_next_byte_idx = (station_info->ID) / 8; |
---|
| 598 | |
---|
| 599 | if(tim_next_byte_idx > tim_byte_idx){ |
---|
| 600 | //We've moved on to a new octet. We should zero everything after the previous octet |
---|
| 601 | //up to and including the new octet. |
---|
| 602 | for(i = tim_byte_idx+1; i <= tim_next_byte_idx; i++){ |
---|
| 603 | mgmt_tag_tim_template->data[3+i] = 0; |
---|
| 604 | } |
---|
| 605 | } |
---|
| 606 | |
---|
| 607 | tim_bit_idx = (station_info->ID) % 8; |
---|
| 608 | tim_byte_idx = tim_next_byte_idx; |
---|
| 609 | |
---|
| 610 | //Raise the bit for this station in the TIM partial bitmap |
---|
| 611 | mgmt_tag_tim_template->data[3+tim_byte_idx] |= 1<<tim_bit_idx; |
---|
| 612 | } |
---|
| 613 | |
---|
| 614 | curr_station_entry = dl_entry_next(curr_station_entry); |
---|
| 615 | } |
---|
| 616 | |
---|
| 617 | //mgmt_tag_tim_template->data[0] = gl_beacon_txrx_config.dtim_count; //Note: this field is going to be maintained by CPU_LOW, so it doesn't matter |
---|
| 618 | // if we write anything to it. |
---|
| 619 | mgmt_tag_tim_template->data[1] = gl_beacon_txrx_config.dtim_period; |
---|
| 620 | mgmt_tag_tim_template->data[2] = tim_control; //TIM Control (top 7 bits are offset for partial map) |
---|
| 621 | if(gl_dtim_mcast_buffer_enable == 0){ |
---|
| 622 | mgmt_tag_tim_template->data[3] |= tim_control&1; //Per 10.2.1.3 in 802.11-2012: AID 0 is treated as |
---|
| 623 | //the multicast buffer state |
---|
| 624 | } |
---|
| 625 | tx_frame_info->length += (next_mgmt_tag_length - existing_mgmt_tag_length); |
---|
| 626 | |
---|
| 627 | if(unlock_tx_pkt_buf(TX_PKT_BUF_BEACON) != PKT_BUF_MUTEX_SUCCESS){ |
---|
| 628 | xil_printf("Error: Unable to unlock Beacon packet buffer during update_tim_tag_all\n"); |
---|
| 629 | } |
---|
| 630 | return; |
---|
| 631 | |
---|
| 632 | } |
---|
| 633 | |
---|
| 634 | /*****************************************************************************/ |
---|
| 635 | /** |
---|
| 636 | * @brief Poll Tx queues to select next available packet to transmit |
---|
| 637 | * |
---|
| 638 | * This function attempts to completely fill any available Tx packet buffers. If |
---|
| 639 | * DTIM multicast buffering is enabled, it will attempt to dequeue as many multicast |
---|
| 640 | * packets as possible such that PKT_BUF_GROUP_DTIM_MCAST packet buffer group is full |
---|
| 641 | * or the multicast queue is empty (whichever comes first). The PKT_BUF_GROUP_GENERAL |
---|
| 642 | * packet buffer group will be filled with frames with a nested round-robing policy: |
---|
| 643 | * 1) The function will alternate between dequeueing management and data frames in order |
---|
| 644 | * to prioritize time-critical management responses like authentication and assocation |
---|
| 645 | * response frames. |
---|
| 646 | * 2) Data frames will be dequeued round-robin for each associated station. If DTIM multicast |
---|
| 647 | * buffering is disabled, the multicast queue will be treated like an associated station in |
---|
| 648 | * this policy. |
---|
| 649 | * |
---|
| 650 | *****************************************************************************/ |
---|
| 651 | #define NUM_QUEUE_GROUPS 2 |
---|
| 652 | typedef enum queue_group_t{ |
---|
| 653 | MGMT_QGRP, |
---|
| 654 | DATA_QGRP |
---|
| 655 | } queue_group_t; |
---|
| 656 | |
---|
| 657 | void poll_tx_queues(){ |
---|
| 658 | interrupt_state_t curr_interrupt_state; |
---|
| 659 | dl_entry* tx_queue_entry; |
---|
| 660 | u32 u_i; |
---|
| 661 | s32 s_i; |
---|
| 662 | |
---|
| 663 | int num_pkt_bufs_avail; |
---|
| 664 | int poll_loop_cnt; |
---|
| 665 | |
---|
| 666 | // Remember the next group to poll between calls to this function |
---|
| 667 | // This implements the ping-pong poll between the MGMT_QGRP and DATA_QGRP groups |
---|
| 668 | static queue_group_t next_queue_group = MGMT_QGRP; |
---|
| 669 | queue_group_t curr_queue_group; |
---|
| 670 | |
---|
| 671 | // Remember the last queue polled between calls to this function |
---|
| 672 | // This implements the round-robin poll of queues in the DATA_QGRP group |
---|
| 673 | static station_info_entry_t* next_station_info_entry = NULL; |
---|
| 674 | station_info_entry_t* curr_station_info_entry; |
---|
| 675 | |
---|
| 676 | station_info_t* curr_station_info; |
---|
| 677 | |
---|
| 678 | // Stop interrupts for all processing below - this avoids many possible race conditions, |
---|
| 679 | // like new packets being enqueued or stations joining/leaving the BSS |
---|
| 680 | curr_interrupt_state = wlan_platform_intc_stop(); |
---|
| 681 | |
---|
| 682 | // First handle the general packet buffer group |
---|
| 683 | num_pkt_bufs_avail = wlan_mac_num_tx_pkt_buf_available(PKT_BUF_GROUP_GENERAL); |
---|
| 684 | |
---|
| 685 | // This loop will (at most) check every queue twice |
---|
| 686 | // This handles the case of a single non-empty queue needing to supply packets |
---|
| 687 | // for both GENERAL packet buffers |
---|
| 688 | poll_loop_cnt = 0; |
---|
| 689 | while((num_pkt_bufs_avail > 0) && (poll_loop_cnt < (2*NUM_QUEUE_GROUPS))) { |
---|
| 690 | poll_loop_cnt++; |
---|
| 691 | curr_queue_group = next_queue_group; |
---|
| 692 | |
---|
| 693 | if(curr_queue_group == MGMT_QGRP) { |
---|
| 694 | // Poll the management queue on this loop, data queues on next loop |
---|
| 695 | next_queue_group = DATA_QGRP; |
---|
| 696 | tx_queue_entry = queue_dequeue(mgmt_qid); |
---|
| 697 | if(tx_queue_entry) { |
---|
| 698 | // Update the packet buffer group |
---|
| 699 | ((tx_80211_queue_buffer_t*)(tx_queue_entry->data))->tx_queue_details.pkt_buf_group = PKT_BUF_GROUP_GENERAL; |
---|
| 700 | // Successfully dequeued a management packet - transmit and checkin |
---|
| 701 | wlan_mac_transmit_wireless(tx_queue_entry); |
---|
| 702 | //continue the loop |
---|
| 703 | num_pkt_bufs_avail--; |
---|
| 704 | continue; |
---|
| 705 | } |
---|
| 706 | } else { |
---|
| 707 | // Poll the data queues on this loop, management queue on next loop |
---|
| 708 | next_queue_group = MGMT_QGRP; |
---|
| 709 | |
---|
| 710 | if(pause_data_queue) { |
---|
| 711 | // Data queues are paused - skip any dequeue attempts and continue the loop |
---|
| 712 | continue; |
---|
| 713 | } |
---|
| 714 | |
---|
| 715 | for(u_i = 0; u_i < (active_network_info->members.length + 1); u_i++) { |
---|
| 716 | // Resume polling data queues from where we stopped on the previous call |
---|
| 717 | curr_station_info_entry = next_station_info_entry; |
---|
| 718 | |
---|
| 719 | // Loop through all associated stations' queues and the broadcast queue |
---|
| 720 | if(curr_station_info_entry == NULL) { |
---|
| 721 | next_station_info_entry = (station_info_entry_t*)(active_network_info->members.first); |
---|
| 722 | |
---|
| 723 | // Only check the multicast queue in this loop when DTIM Multicast Buffering is disabled |
---|
| 724 | if( gl_dtim_mcast_buffer_enable && gl_cpu_low_supports_dtim_mcast && (gl_beacon_txrx_config.beacon_tx_mode != NO_BEACON_TX)) { |
---|
| 725 | // DTIM multicast buffering is enabled - skip the multicast queue |
---|
| 726 | continue; |
---|
| 727 | } else { |
---|
| 728 | tx_queue_entry = queue_dequeue(mcast_qid); |
---|
| 729 | if(tx_queue_entry) { |
---|
| 730 | // Update the packet buffer group |
---|
| 731 | ((tx_80211_queue_buffer_t*)(tx_queue_entry->data))->tx_queue_details.pkt_buf_group = PKT_BUF_GROUP_GENERAL; |
---|
| 732 | // Successfully dequeued a management packet - transmit and checkin |
---|
| 733 | wlan_mac_transmit_wireless(tx_queue_entry); |
---|
| 734 | // Successfully dequeued a multicast packet - end the DATA_QGRP loop |
---|
| 735 | num_pkt_bufs_avail--; |
---|
| 736 | break; |
---|
| 737 | } |
---|
| 738 | } |
---|
| 739 | |
---|
| 740 | } else { |
---|
| 741 | // Check the queue for an associated station |
---|
| 742 | curr_station_info = (station_info_t*)(curr_station_info_entry->data); |
---|
| 743 | |
---|
| 744 | if( station_info_is_member(&active_network_info->members, curr_station_info)) { |
---|
| 745 | if(curr_station_info_entry == (station_info_entry_t*)(active_network_info->members.last)){ |
---|
| 746 | // We've reached the end of the table, so we wrap around to the beginning |
---|
| 747 | next_station_info_entry = NULL; |
---|
| 748 | } else { |
---|
| 749 | next_station_info_entry = dl_entry_next(curr_station_info_entry); |
---|
| 750 | } |
---|
| 751 | |
---|
| 752 | if((curr_station_info->ps_state & STATION_INFO_PS_STATE_DOZE) == 0) { |
---|
| 753 | |
---|
| 754 | tx_queue_entry = queue_dequeue(curr_station_info->QID); |
---|
| 755 | if(tx_queue_entry) { |
---|
| 756 | // Update the packet buffer group |
---|
| 757 | ((tx_80211_queue_buffer_t*)(tx_queue_entry->data))->tx_queue_details.pkt_buf_group = PKT_BUF_GROUP_GENERAL; |
---|
| 758 | // Successfully dequeued a management packet - transmit and checkin |
---|
| 759 | wlan_mac_transmit_wireless(tx_queue_entry); |
---|
| 760 | // Successfully dequeued a unicast packet for this station - end the DATA_QGRP loop |
---|
| 761 | num_pkt_bufs_avail--; |
---|
| 762 | break; |
---|
| 763 | } |
---|
| 764 | } |
---|
| 765 | } else { |
---|
| 766 | // This curr_station_info is invalid. Perhaps it was removed from |
---|
| 767 | // the association table before poll_tx_queues was called. We will |
---|
| 768 | // start the round robin checking back at broadcast. |
---|
| 769 | next_station_info_entry = NULL; |
---|
| 770 | } // END if(curr_station_info is BSS member) |
---|
| 771 | } // END if(multicast queue or station queue) |
---|
| 772 | } // END for loop over association table |
---|
| 773 | } // END if(MGMT or DATA queue group) |
---|
| 774 | } // END while(buffers available && keep polling) |
---|
| 775 | |
---|
| 776 | |
---|
| 777 | // Next handle the DTIM Multicast packet buffer group |
---|
| 778 | if(gl_dtim_mcast_buffer_enable && gl_cpu_low_supports_dtim_mcast && (gl_beacon_txrx_config.beacon_tx_mode != NO_BEACON_TX)) { |
---|
| 779 | |
---|
| 780 | num_pkt_bufs_avail = wlan_mac_num_tx_pkt_buf_available(PKT_BUF_GROUP_DTIM_MCAST); |
---|
| 781 | |
---|
| 782 | for(s_i=0; s_i<num_pkt_bufs_avail; s_i++) { |
---|
| 783 | // Dequeue packets until there are no more packet buffers or no more packets |
---|
| 784 | tx_queue_entry = queue_dequeue(mcast_qid); |
---|
| 785 | if(tx_queue_entry) { |
---|
| 786 | // Update the packet buffer group |
---|
| 787 | ((tx_80211_queue_buffer_t*)(tx_queue_entry->data))->tx_queue_details.pkt_buf_group = PKT_BUF_GROUP_DTIM_MCAST; |
---|
| 788 | // Successfully dequeued a management packet - transmit and checkin |
---|
| 789 | wlan_mac_transmit_wireless(tx_queue_entry); |
---|
| 790 | } else { |
---|
| 791 | // Queue is empty - end this loop |
---|
| 792 | break; |
---|
| 793 | } |
---|
| 794 | } |
---|
| 795 | } |
---|
| 796 | |
---|
| 797 | wlan_platform_intc_set_state(curr_interrupt_state); |
---|
| 798 | } |
---|
| 799 | |
---|
| 800 | |
---|
| 801 | |
---|
| 802 | /*****************************************************************************/ |
---|
| 803 | /** |
---|
| 804 | * @brief Purges all packets from all Tx queues |
---|
| 805 | * |
---|
| 806 | * This function discards all currently en-queued packets awaiting transmission and returns all |
---|
| 807 | * queue entries to the free pool. |
---|
| 808 | * |
---|
| 809 | * This function does not discard packets already submitted to the lower-level MAC for transmission |
---|
| 810 | * |
---|
| 811 | * @param None |
---|
| 812 | * @return None |
---|
| 813 | *****************************************************************************/ |
---|
| 814 | void purge_all_wireless_tx_queue(){ |
---|
| 815 | station_info_entry_t* curr_station_info_entry; |
---|
| 816 | station_info_t* curr_station_info; |
---|
| 817 | |
---|
| 818 | if(active_network_info == NULL) return; |
---|
| 819 | |
---|
| 820 | int iter = active_network_info->members.length; |
---|
| 821 | |
---|
| 822 | // Purge all data transmit queues |
---|
| 823 | wlan_mac_purge_wireless_tx(mcast_qid); |
---|
| 824 | wlan_mac_purge_wireless_tx(mgmt_qid); |
---|
| 825 | curr_station_info_entry = (station_info_entry_t*)(active_network_info->members.first); |
---|
| 826 | |
---|
| 827 | while( (curr_station_info_entry != NULL) && (iter-- > 0)){ |
---|
| 828 | curr_station_info = curr_station_info_entry->data; |
---|
| 829 | wlan_mac_purge_wireless_tx(curr_station_info->QID); |
---|
| 830 | curr_station_info_entry = dl_entry_next(curr_station_info_entry); |
---|
| 831 | } |
---|
| 832 | } |
---|
| 833 | #if WLAN_SW_CONFIG_ENABLE_LTG |
---|
| 834 | /*****************************************************************************/ |
---|
| 835 | /** |
---|
| 836 | * @brief Callback to handle new Local Traffic Generator event |
---|
| 837 | * |
---|
| 838 | * This function is called when the LTG scheduler determines a traffic generator should create a new packet. The |
---|
| 839 | * behavior of this function depends entirely on the LTG payload parameters. |
---|
| 840 | * |
---|
| 841 | * The reference implementation defines 3 LTG payload types: |
---|
| 842 | * - LTG_PYLD_TYPE_FIXED: generate 1 fixed-length packet to single destination; callback_arg is pointer to ltg_pyld_fixed struct |
---|
| 843 | * - LTG_PYLD_TYPE_UNIFORM_RAND: generate 1 random-length packet to single destination; callback_arg is pointer to ltg_pyld_uniform_rand_t struct |
---|
| 844 | * - 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 |
---|
| 845 | * |
---|
| 846 | * @param u32 id |
---|
| 847 | * - Unique ID of the previously created LTG |
---|
| 848 | * @param void* callback_arg |
---|
| 849 | * - Callback argument provided at LTG creation time; interpretation depends on LTG type |
---|
| 850 | * @return None |
---|
| 851 | *****************************************************************************/ |
---|
| 852 | void ltg_event(u32 id, void* callback_arg){ |
---|
| 853 | |
---|
| 854 | u32 payload_length; |
---|
| 855 | u8* addr_ra; |
---|
| 856 | u16 duration; |
---|
| 857 | u32 min_ltg_payload_length; |
---|
| 858 | station_info_t* station_info = NULL; |
---|
| 859 | station_info_entry_t* station_info_entry = NULL; |
---|
| 860 | u8 is_multicast; |
---|
| 861 | u8 queue_id; |
---|
| 862 | dl_entry* tx_queue_entry = NULL; |
---|
| 863 | tx_80211_queue_buffer_t* tx_queue_buffer = NULL; |
---|
| 864 | u8 continue_loop; |
---|
| 865 | u16 flags = TX_80211_QUEUE_BUFFER_FLAGS_FILL_UNIQ_SEQ; |
---|
| 866 | |
---|
| 867 | if(((ltg_pyld_hdr_t*)callback_arg)->type == LTG_PYLD_TYPE_CTRL_RESP){ |
---|
| 868 | |
---|
| 869 | tx_queue_entry = queue_checkout(); |
---|
| 870 | if(tx_queue_entry != NULL){ |
---|
| 871 | tx_queue_buffer = ((tx_80211_queue_buffer_t*)(tx_queue_entry->data)); |
---|
| 872 | |
---|
| 873 | addr_ra = ((ltg_pyld_ctrl_resp_t*)callback_arg)->addr_ra; |
---|
| 874 | duration = ((ltg_pyld_ctrl_resp_t*)callback_arg)->duration; |
---|
| 875 | |
---|
| 876 | if(((ltg_pyld_ctrl_resp_t*)callback_arg)->subtype == LTG_PYLD_CTRL_RESP_SUBTYPE_CTS){ |
---|
| 877 | |
---|
| 878 | payload_length = wlan_create_cts_frame(tx_queue_buffer->pkt, |
---|
| 879 | addr_ra, |
---|
| 880 | duration); |
---|
| 881 | |
---|
| 882 | tx_queue_buffer->flags = TX_80211_QUEUE_BUFFER_FLAGS_TYPE_CTS; |
---|
| 883 | |
---|
| 884 | } else { //LTG_PYLD_CTRL_RESP_SUBTYPE_ACK |
---|
| 885 | payload_length = wlan_create_ack_frame(tx_queue_buffer->pkt, |
---|
| 886 | addr_ra); |
---|
| 887 | tx_queue_buffer->flags = TX_80211_QUEUE_BUFFER_FLAGS_TYPE_ACK; |
---|
| 888 | } |
---|
| 889 | |
---|
| 890 | // Fill in metadata |
---|
| 891 | tx_queue_buffer->flags |= TX_80211_QUEUE_BUFFER_FLAGS_BYPASS_RECOVERY; |
---|
| 892 | tx_queue_buffer->length = payload_length; |
---|
| 893 | tx_queue_buffer->seg0_len = payload_length; |
---|
| 894 | tx_queue_buffer->seg1_len = 0; |
---|
| 895 | tx_queue_buffer->seg1_offset = 0; |
---|
| 896 | |
---|
| 897 | // With LTG_PYLD_TYPE_CTRL_RESP, we will transmit to the receive address (addr_ra) regardless of |
---|
| 898 | // whether that address is an AP that we are associated to. To do that, we need to make sure that |
---|
| 899 | // a station_info_t exists for that address |
---|
| 900 | tx_queue_buffer->station_info = station_info_create(addr_ra); |
---|
| 901 | |
---|
| 902 | wlan_mac_enqueue_wireless_tx(mgmt_qid, tx_queue_entry); |
---|
| 903 | |
---|
| 904 | } |
---|
| 905 | } else { |
---|
| 906 | |
---|
| 907 | if(active_network_info != NULL){ |
---|
| 908 | u8* addr_da; |
---|
| 909 | switch(((ltg_pyld_hdr_t*)callback_arg)->type){ |
---|
| 910 | case LTG_PYLD_TYPE_FIXED: |
---|
| 911 | payload_length = ((ltg_pyld_fixed_t*)callback_arg)->length; |
---|
| 912 | addr_da = ((ltg_pyld_fixed_t*)callback_arg)->addr_da; |
---|
| 913 | |
---|
| 914 | station_info = station_info_create(addr_da); |
---|
| 915 | |
---|
| 916 | is_multicast = wlan_addr_mcast(addr_da); |
---|
| 917 | if(is_multicast){ |
---|
| 918 | queue_id = mcast_qid; |
---|
| 919 | } else { |
---|
| 920 | flags |= TX_80211_QUEUE_BUFFER_FLAGS_FILL_DURATION; |
---|
| 921 | if(station_info_is_member(&active_network_info->members, station_info)){ |
---|
| 922 | queue_id = station_info->QID; |
---|
| 923 | } else { |
---|
| 924 | return; |
---|
| 925 | } |
---|
| 926 | } |
---|
| 927 | break; |
---|
| 928 | |
---|
| 929 | case LTG_PYLD_TYPE_UNIFORM_RAND: |
---|
| 930 | 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; |
---|
| 931 | addr_da = ((ltg_pyld_fixed_t*)callback_arg)->addr_da; |
---|
| 932 | |
---|
| 933 | station_info = station_info_create(addr_da); |
---|
| 934 | |
---|
| 935 | is_multicast = wlan_addr_mcast(addr_da); |
---|
| 936 | if(is_multicast){ |
---|
| 937 | queue_id = mcast_qid; |
---|
| 938 | } else { |
---|
| 939 | flags |= TX_80211_QUEUE_BUFFER_FLAGS_FILL_DURATION; |
---|
| 940 | if(station_info_is_member(&active_network_info->members, station_info)){ |
---|
| 941 | queue_id = station_info->QID; |
---|
| 942 | } else { |
---|
| 943 | return; |
---|
| 944 | } |
---|
| 945 | } |
---|
| 946 | break; |
---|
| 947 | |
---|
| 948 | case LTG_PYLD_TYPE_ALL_ASSOC_FIXED: |
---|
| 949 | if(active_network_info->members.length > 0){ |
---|
| 950 | flags |= TX_80211_QUEUE_BUFFER_FLAGS_FILL_DURATION; |
---|
| 951 | station_info_entry = (station_info_entry_t*)(active_network_info->members.first); |
---|
| 952 | station_info = (station_info_t*)station_info_entry->data; |
---|
| 953 | addr_da = station_info_entry->addr; |
---|
| 954 | queue_id = station_info->QID; |
---|
| 955 | is_multicast = 0; |
---|
| 956 | payload_length = ((ltg_pyld_all_assoc_fixed_t*)callback_arg)->length; |
---|
| 957 | } else { |
---|
| 958 | return; |
---|
| 959 | } |
---|
| 960 | break; |
---|
| 961 | |
---|
| 962 | default: |
---|
| 963 | xil_printf("ERROR ltg_event: Unknown LTG Payload Type! (%d)\n", ((ltg_pyld_hdr_t*)callback_arg)->type); |
---|
| 964 | return; |
---|
| 965 | break; |
---|
| 966 | } |
---|
| 967 | |
---|
| 968 | do{ |
---|
| 969 | continue_loop = 0; |
---|
| 970 | |
---|
| 971 | if(queue_length(queue_id) < max_queue_size){ |
---|
| 972 | // Checkout 1 element from the queue; |
---|
| 973 | tx_queue_entry = queue_checkout(); |
---|
| 974 | if(tx_queue_entry != NULL){ |
---|
| 975 | |
---|
| 976 | // Create LTG packet |
---|
| 977 | tx_queue_buffer = ((tx_80211_queue_buffer_t*)(tx_queue_entry->data)); |
---|
| 978 | |
---|
| 979 | min_ltg_payload_length = wlan_create_ltg_frame(tx_queue_buffer->pkt, |
---|
| 980 | addr_da, |
---|
| 981 | wlan_mac_addr, |
---|
| 982 | wlan_mac_addr, |
---|
| 983 | MAC_FRAME_CTRL2_FLAG_FROM_DS, |
---|
| 984 | id); |
---|
| 985 | |
---|
| 986 | payload_length = WLAN_MAX(payload_length+sizeof(mac_header_80211)+WLAN_PHY_FCS_NBYTES, min_ltg_payload_length); |
---|
| 987 | |
---|
| 988 | |
---|
| 989 | |
---|
| 990 | // Fill in metadata |
---|
| 991 | tx_queue_buffer->flags = flags; |
---|
| 992 | tx_queue_buffer->length = payload_length; |
---|
| 993 | tx_queue_buffer->seg0_len = min_ltg_payload_length; |
---|
| 994 | tx_queue_buffer->seg1_len = 0; |
---|
| 995 | tx_queue_buffer->seg1_offset = 0; |
---|
| 996 | tx_queue_buffer->station_info = station_info; |
---|
| 997 | |
---|
| 998 | // Submit the new packet to the appropriate queue |
---|
| 999 | wlan_mac_enqueue_wireless_tx(queue_id, tx_queue_entry); |
---|
| 1000 | |
---|
| 1001 | } else { |
---|
| 1002 | // There aren't any free queue elements right now. |
---|
| 1003 | // As such, there probably isn't any point to continuing this callback. |
---|
| 1004 | // We'll return and try again once it is called the next time. |
---|
| 1005 | return; |
---|
| 1006 | } |
---|
| 1007 | } |
---|
| 1008 | |
---|
| 1009 | if(((ltg_pyld_hdr_t*)callback_arg)->type == LTG_PYLD_TYPE_ALL_ASSOC_FIXED){ |
---|
| 1010 | station_info_entry = dl_entry_next(station_info_entry); |
---|
| 1011 | if(station_info_entry != NULL){ |
---|
| 1012 | station_info = (station_info_t*)station_info_entry->data; |
---|
| 1013 | addr_da = station_info_entry->addr; |
---|
| 1014 | queue_id = station_info->QID; |
---|
| 1015 | is_multicast = 0; |
---|
| 1016 | continue_loop = 1; |
---|
| 1017 | } else { |
---|
| 1018 | continue_loop = 0; |
---|
| 1019 | } |
---|
| 1020 | } else { |
---|
| 1021 | continue_loop = 0; |
---|
| 1022 | } |
---|
| 1023 | } while(continue_loop == 1); |
---|
| 1024 | } |
---|
| 1025 | } |
---|
| 1026 | } |
---|
| 1027 | #endif //WLAN_SW_CONFIG_ENABLE_LTG |
---|
| 1028 | |
---|
| 1029 | |
---|
| 1030 | /*****************************************************************************/ |
---|
| 1031 | /** |
---|
| 1032 | * @brief Callback to handle insertion of an Ethernet reception into the corresponding wireless Tx queue |
---|
| 1033 | * |
---|
| 1034 | * This function is called when a new Ethernet packet is received that must be transmitted via the wireless interface. |
---|
| 1035 | * The packet must be encapsulated before it is passed to this function. Ethernet encapsulation is implemented in the mac_high framework. |
---|
| 1036 | * |
---|
| 1037 | *****************************************************************************/ |
---|
| 1038 | int ethernet_receive(eth_rx_queue_buffer_t* eth_rx_queue_buffer){ |
---|
| 1039 | tx_80211_queue_buffer_t* tx_queue_buffer; |
---|
| 1040 | ethernet_header_t* eth_hdr; |
---|
| 1041 | station_info_entry_t* entry; |
---|
| 1042 | station_info_t* station_info; |
---|
| 1043 | |
---|
| 1044 | if(active_network_info == NULL) return 0; |
---|
| 1045 | |
---|
| 1046 | eth_hdr = (ethernet_header_t*)eth_rx_queue_buffer->pkt; |
---|
| 1047 | |
---|
| 1048 | if( (eth_hdr->ethertype != ETH_TYPE_ARP) && (eth_hdr->ethertype != ETH_TYPE_IP) ) return 0; |
---|
| 1049 | |
---|
| 1050 | // Determine how to send the packet |
---|
| 1051 | if( wlan_addr_mcast(eth_hdr->dest_mac_addr) ) { |
---|
| 1052 | // Send the multicast packet |
---|
| 1053 | if(queue_length(mcast_qid) < max_queue_size){ |
---|
| 1054 | |
---|
| 1055 | //Encapsulate the packet |
---|
| 1056 | // Note: the encapsulation function handles filling in the C0/C1 lengths and C1 offset for us |
---|
| 1057 | tx_queue_buffer = wlan_eth_encap( eth_rx_queue_buffer, 0 ); |
---|
| 1058 | |
---|
| 1059 | tx_queue_buffer->flags = 0; |
---|
| 1060 | |
---|
| 1061 | wlan_create_data_frame_header(tx_queue_buffer->pkt, |
---|
| 1062 | eth_hdr->dest_mac_addr, |
---|
| 1063 | wlan_mac_addr, |
---|
| 1064 | eth_hdr->src_mac_addr, |
---|
| 1065 | MAC_FRAME_CTRL2_FLAG_FROM_DS); |
---|
| 1066 | |
---|
| 1067 | // Assign a station_info_t struct |
---|
| 1068 | // Notes: (1) if one exists already, it will be adopted. |
---|
| 1069 | // (2) if no heap exists for creating one, NULL is a valid |
---|
| 1070 | // value for the station_info_t* |
---|
| 1071 | tx_queue_buffer->station_info = station_info_create(eth_hdr->dest_mac_addr); |
---|
| 1072 | |
---|
| 1073 | // Put the packet in the queue |
---|
| 1074 | wlan_mac_enqueue_wireless_tx(mcast_qid, eth_rx_queue_buffer->pyld_queue_hdr.dle); |
---|
| 1075 | |
---|
| 1076 | } else { |
---|
| 1077 | // Packet was not successfully enqueued |
---|
| 1078 | return 0; |
---|
| 1079 | } |
---|
| 1080 | |
---|
| 1081 | } else { |
---|
| 1082 | // Check associations |
---|
| 1083 | // Is this packet meant for a station we are associated with? |
---|
| 1084 | |
---|
| 1085 | entry = station_info_find_by_addr(eth_hdr->dest_mac_addr, &active_network_info->members); |
---|
| 1086 | |
---|
| 1087 | if( entry != NULL ) { |
---|
| 1088 | station_info = (station_info_t*)(entry->data); |
---|
| 1089 | |
---|
| 1090 | // Send the unicast packet |
---|
| 1091 | if(queue_length(station_info->QID) < max_queue_size){ |
---|
| 1092 | |
---|
| 1093 | //Encapsulate the packet |
---|
| 1094 | // Note: the encapsulation function handles filling in the C0/C1 lengths and C1 offset for us |
---|
| 1095 | tx_queue_buffer = wlan_eth_encap( eth_rx_queue_buffer, 0 ); |
---|
| 1096 | |
---|
| 1097 | if(tx_queue_buffer){ |
---|
| 1098 | // Fill in metadata |
---|
| 1099 | tx_queue_buffer->flags = TX_80211_QUEUE_BUFFER_FLAGS_FILL_DURATION; |
---|
| 1100 | |
---|
| 1101 | wlan_create_data_frame_header(tx_queue_buffer->pkt, |
---|
| 1102 | eth_hdr->dest_mac_addr, |
---|
| 1103 | wlan_mac_addr, |
---|
| 1104 | eth_hdr->src_mac_addr, |
---|
| 1105 | MAC_FRAME_CTRL2_FLAG_FROM_DS); |
---|
| 1106 | |
---|
| 1107 | tx_queue_buffer->station_info = station_info; |
---|
| 1108 | |
---|
| 1109 | // Put the packet in the queue |
---|
| 1110 | wlan_mac_enqueue_wireless_tx(station_info->QID, tx_queue_buffer->pyld_queue_hdr.dle); |
---|
| 1111 | } else { |
---|
| 1112 | return 0; |
---|
| 1113 | } |
---|
| 1114 | |
---|
| 1115 | } else { |
---|
| 1116 | // Packet was not successfully enqueued |
---|
| 1117 | return 0; |
---|
| 1118 | } |
---|
| 1119 | } else { |
---|
| 1120 | // Packet was not successfully enqueued |
---|
| 1121 | return 0; |
---|
| 1122 | } |
---|
| 1123 | } |
---|
| 1124 | |
---|
| 1125 | // Packet successfully enqueued |
---|
| 1126 | return 1; |
---|
| 1127 | } |
---|
| 1128 | |
---|
| 1129 | //TODO: Create function to update beacon live fields (e.g. TIM bitmap) |
---|
| 1130 | // We may need to formalize a beacon ping/pong handshake to avoid any races |
---|
| 1131 | // created by CPU_HIGH modifying the beacon payload while the PHY is actively |
---|
| 1132 | // reading bytes out of the packet buffer to create a waveform. |
---|
| 1133 | |
---|
| 1134 | |
---|
| 1135 | |
---|
| 1136 | /*****************************************************************************/ |
---|
| 1137 | /** |
---|
| 1138 | * @brief Check the time since the AP heard from each station |
---|
| 1139 | * |
---|
| 1140 | * This function will check the timestamp of the last reception from each station and send a |
---|
| 1141 | * de-authentication packet to any stations that have timed out. |
---|
| 1142 | * |
---|
| 1143 | * @param None |
---|
| 1144 | * @return None |
---|
| 1145 | *****************************************************************************/ |
---|
| 1146 | void remove_inactive_station_infos() { |
---|
| 1147 | |
---|
| 1148 | u32 aid; |
---|
| 1149 | u64 time_since_last_activity; |
---|
| 1150 | station_info_t* curr_station_info; |
---|
| 1151 | dl_entry* curr_station_info_entry; |
---|
| 1152 | dl_entry* next_station_info_entry; |
---|
| 1153 | time_hr_min_sec_t time_hr_min_sec; |
---|
| 1154 | |
---|
| 1155 | if(active_network_info == NULL) return; |
---|
| 1156 | |
---|
| 1157 | next_station_info_entry = active_network_info->members.first; |
---|
| 1158 | |
---|
| 1159 | while(next_station_info_entry != NULL) { |
---|
| 1160 | curr_station_info_entry = next_station_info_entry; |
---|
| 1161 | next_station_info_entry = dl_entry_next(curr_station_info_entry); |
---|
| 1162 | |
---|
| 1163 | curr_station_info = (station_info_t*)(curr_station_info_entry->data); |
---|
| 1164 | time_since_last_activity = (get_system_time_usec() - curr_station_info->latest_rx_timestamp); |
---|
| 1165 | |
---|
| 1166 | // De-authenticate the station if we have timed out and we have not disabled this check for the station |
---|
| 1167 | if((time_since_last_activity > ASSOCIATION_TIMEOUT_US) && ((curr_station_info->flags & STATION_INFO_FLAG_DISABLE_ASSOC_CHECK) == 0)){ |
---|
| 1168 | |
---|
| 1169 | aid = deauthenticate_station( curr_station_info ); |
---|
| 1170 | |
---|
| 1171 | if (aid != 0) { |
---|
| 1172 | xil_printf("\n\nDisassociation due to inactivity:\n"); |
---|
| 1173 | } |
---|
| 1174 | } |
---|
| 1175 | } |
---|
| 1176 | |
---|
| 1177 | next_station_info_entry = authenticated_unassociated_stations.first; |
---|
| 1178 | |
---|
| 1179 | while(next_station_info_entry != NULL) { |
---|
| 1180 | curr_station_info_entry = next_station_info_entry; |
---|
| 1181 | next_station_info_entry = dl_entry_next(curr_station_info_entry); |
---|
| 1182 | |
---|
| 1183 | curr_station_info = (station_info_t*)(curr_station_info_entry->data); |
---|
| 1184 | time_since_last_activity = (get_system_time_usec() - curr_station_info->latest_rx_timestamp); |
---|
| 1185 | |
---|
| 1186 | // De-authenticate the station if we have timed out and we have not disabled this check for the station |
---|
| 1187 | if((time_since_last_activity > ASSOCIATION_TIMEOUT_US) && ((curr_station_info->flags & STATION_INFO_FLAG_DISABLE_ASSOC_CHECK) == 0)){ |
---|
| 1188 | |
---|
| 1189 | station_info_remove_from_list(&authenticated_unassociated_stations, curr_station_info->addr); |
---|
| 1190 | |
---|
| 1191 | time_hr_min_sec = wlan_mac_time_to_hr_min_sec(get_system_time_usec()); |
---|
| 1192 | |
---|
| 1193 | xil_printf("*%dh:%02dm:%02ds* STA %02x:%02x:%02x:%02x:%02x:%02x has disassociated\n", |
---|
| 1194 | time_hr_min_sec.hr, time_hr_min_sec.min, time_hr_min_sec.sec, |
---|
| 1195 | curr_station_info->addr[0], curr_station_info->addr[1], curr_station_info->addr[2], |
---|
| 1196 | curr_station_info->addr[3], curr_station_info->addr[4], curr_station_info->addr[5]); |
---|
| 1197 | |
---|
| 1198 | // Remove the "keep" flag for this station_info so the framework can cleanup later. |
---|
| 1199 | curr_station_info->flags &= ~STATION_INFO_FLAG_KEEP; |
---|
| 1200 | } |
---|
| 1201 | } |
---|
| 1202 | } |
---|
| 1203 | |
---|
| 1204 | |
---|
| 1205 | |
---|
| 1206 | /*****************************************************************************/ |
---|
| 1207 | /** |
---|
| 1208 | * @brief Process received MPDUs |
---|
| 1209 | * |
---|
| 1210 | * This callback function will process all the received MPDUs. |
---|
| 1211 | * |
---|
| 1212 | * This function must implement the state machine that will allow a station to join the AP. |
---|
| 1213 | * |
---|
| 1214 | * @param void* pkt_buf_addr |
---|
| 1215 | * - Packet buffer address; Contains the contents of the MPDU as well as other packet information from CPU low |
---|
| 1216 | * @param station_info_t * station_info |
---|
| 1217 | * - Pointer to metadata about the station from which this frame was received |
---|
| 1218 | * @param rx_common_entry* rx_event_log_entry |
---|
| 1219 | * - Pointer to the log entry created for this reception by the MAC High Framework |
---|
| 1220 | * @return u32 flags |
---|
| 1221 | * |
---|
| 1222 | *****************************************************************************/ |
---|
| 1223 | u32 mpdu_rx_process(void* pkt_buf_addr, station_info_t* station_info, rx_common_entry* rx_event_log_entry) { |
---|
| 1224 | |
---|
| 1225 | rx_frame_info_t* rx_frame_info = (rx_frame_info_t*)pkt_buf_addr; |
---|
| 1226 | u8* rx_mac_payload = (u8*)pkt_buf_addr + PHY_RX_PKT_BUF_MPDU_OFFSET; |
---|
| 1227 | u8* mac_payload_ptr_u8 = rx_mac_payload; // Make a copy of rx_mac_payload that can be modified while traversing through tagged parameters. |
---|
| 1228 | |
---|
| 1229 | mac_header_80211* rx_80211_header = (mac_header_80211*)(rx_mac_payload); |
---|
| 1230 | mac_header_80211* tx_80211_header; |
---|
| 1231 | |
---|
| 1232 | u8 send_response = 0; |
---|
| 1233 | u16 tx_length; |
---|
| 1234 | u16 rx_seq; |
---|
| 1235 | dl_entry* tx_queue_entry; |
---|
| 1236 | tx_80211_queue_buffer_t* tx_queue_buffer; |
---|
| 1237 | char ssid[SSID_LEN_MAX]; |
---|
| 1238 | u8 ssid_length = 0; |
---|
| 1239 | u8 sta_is_ht_capable = 0; |
---|
| 1240 | u8 sta_is_associated = 0; |
---|
| 1241 | u8 sta_is_authenticated = 0; |
---|
| 1242 | |
---|
| 1243 | station_info_entry_t* associated_station_entry = NULL; |
---|
| 1244 | station_info_t* associated_station = NULL; |
---|
| 1245 | station_info_t* auth_unassoc_station_info = NULL; |
---|
| 1246 | |
---|
| 1247 | u8 unicast_to_me; |
---|
| 1248 | u8 to_multicast; |
---|
| 1249 | u8 eth_send; |
---|
| 1250 | u8 allow_auth = 0; |
---|
| 1251 | |
---|
| 1252 | time_hr_min_sec_t time_hr_min_sec; |
---|
| 1253 | |
---|
| 1254 | u16 rx_length = rx_frame_info->phy_details.length; |
---|
| 1255 | u32 return_val = 0; |
---|
| 1256 | |
---|
| 1257 | // If this function was passed a CTRL frame (e.g., CTS, ACK), then we should just quit. |
---|
| 1258 | // The only reason this occured was so that it could be logged in the line above. |
---|
| 1259 | if((rx_80211_header->frame_control_1 & 0xF) == MAC_FRAME_CTRL1_TYPE_CTRL){ |
---|
| 1260 | goto mpdu_rx_process_end; |
---|
| 1261 | } |
---|
| 1262 | |
---|
| 1263 | // Determine if this STA is currently associated to the active_bss_info |
---|
| 1264 | sta_is_associated = station_info_is_member(&active_network_info->members, station_info); |
---|
| 1265 | |
---|
| 1266 | sta_is_authenticated = (sta_is_associated || station_info_is_member(&authenticated_unassociated_stations, station_info)); |
---|
| 1267 | |
---|
| 1268 | // Determine destination of packet |
---|
| 1269 | unicast_to_me = wlan_addr_eq(rx_80211_header->address_1, wlan_mac_addr); |
---|
| 1270 | to_multicast = wlan_addr_mcast(rx_80211_header->address_1); |
---|
| 1271 | |
---|
| 1272 | // If the packet is good (ie good FCS) and it is destined for me, then process it |
---|
| 1273 | if( rx_frame_info->flags & RX_FRAME_INFO_FLAGS_FCS_GOOD){ |
---|
| 1274 | |
---|
| 1275 | // Sequence number is 12 MSB of seq_control field |
---|
| 1276 | rx_seq = ((rx_80211_header->sequence_control) >> 4) & 0xFFF; |
---|
| 1277 | |
---|
| 1278 | // Check if this was a duplicate reception |
---|
| 1279 | // - Packet is unicast and directed towards me |
---|
| 1280 | // - Packet has the RETRY bit set to 1 in the second frame control byte |
---|
| 1281 | // - Received seq num matched previously received seq num for this STA |
---|
| 1282 | if( (station_info != NULL) && unicast_to_me ){ |
---|
| 1283 | if( ((rx_80211_header->frame_control_2) & MAC_FRAME_CTRL2_FLAG_RETRY) && (station_info->latest_rx_seq == rx_seq) ) { |
---|
| 1284 | if(rx_event_log_entry != NULL){ |
---|
| 1285 | rx_event_log_entry->flags |= RX_FLAGS_DUPLICATE; |
---|
| 1286 | return_val |= MAC_RX_CALLBACK_RETURN_FLAG_DUP; |
---|
| 1287 | } |
---|
| 1288 | } else { |
---|
| 1289 | station_info->latest_rx_seq = rx_seq; |
---|
| 1290 | } |
---|
| 1291 | } |
---|
| 1292 | |
---|
| 1293 | if( sta_is_associated ){ |
---|
| 1294 | // Update PS state |
---|
| 1295 | if((rx_80211_header->frame_control_2) & MAC_FRAME_CTRL2_FLAG_POWER_MGMT){ |
---|
| 1296 | station_info->ps_state |= STATION_INFO_PS_STATE_DOZE; |
---|
| 1297 | } else { |
---|
| 1298 | station_info->ps_state &= ~STATION_INFO_PS_STATE_DOZE; |
---|
| 1299 | poll_tx_queues(); |
---|
| 1300 | } |
---|
| 1301 | |
---|
| 1302 | if( return_val & MAC_RX_CALLBACK_RETURN_FLAG_DUP ) { |
---|
| 1303 | // Finish the function and do not de-encapsulate |
---|
| 1304 | goto mpdu_rx_process_end; |
---|
| 1305 | } |
---|
| 1306 | } |
---|
| 1307 | |
---|
| 1308 | if(unicast_to_me || to_multicast){ |
---|
| 1309 | // Process the packet |
---|
| 1310 | switch(rx_80211_header->frame_control_1) { |
---|
| 1311 | //--------------------------------------------------------------------- |
---|
| 1312 | case MAC_FRAME_CTRL1_SUBTYPE_QOSDATA: |
---|
| 1313 | case MAC_FRAME_CTRL1_SUBTYPE_DATA: |
---|
| 1314 | // Data packet |
---|
| 1315 | // - Determine if this packet is from an associated station |
---|
| 1316 | // - Depending on the type and destination, transmit the packet wirelessly or over the wired network |
---|
| 1317 | // |
---|
| 1318 | |
---|
| 1319 | if( sta_is_associated ){ |
---|
| 1320 | |
---|
| 1321 | // MPDU is flagged as destined to the DS |
---|
| 1322 | if((rx_80211_header->frame_control_2) & MAC_FRAME_CTRL2_FLAG_TO_DS) { |
---|
| 1323 | eth_send = 1; |
---|
| 1324 | |
---|
| 1325 | // Check if this is a multicast packet |
---|
| 1326 | if(wlan_addr_mcast(rx_80211_header->address_3)){ |
---|
| 1327 | // Send the data packet over wireless |
---|
| 1328 | tx_queue_entry = queue_checkout(); |
---|
| 1329 | |
---|
| 1330 | if(tx_queue_entry != NULL){ |
---|
| 1331 | tx_queue_buffer = (tx_80211_queue_buffer_t*)(tx_queue_entry->data); |
---|
| 1332 | |
---|
| 1333 | wlan_create_data_frame_header(tx_queue_buffer->pkt, |
---|
| 1334 | rx_80211_header->address_3, |
---|
| 1335 | wlan_mac_addr, |
---|
| 1336 | rx_80211_header->address_2, |
---|
| 1337 | MAC_FRAME_CTRL2_FLAG_FROM_DS); |
---|
| 1338 | |
---|
| 1339 | // Overwrite packet type with just-received packet type. This will allow |
---|
| 1340 | // relaying of QOSDATA frames |
---|
| 1341 | tx_80211_header = ((mac_header_80211*)(tx_queue_buffer->pkt)); |
---|
| 1342 | tx_80211_header->frame_control_1 = rx_80211_header->frame_control_1; |
---|
| 1343 | |
---|
| 1344 | // Fill in the data |
---|
| 1345 | wlan_mac_high_cdma_start_transfer(tx_queue_buffer->pkt + sizeof(mac_header_80211), |
---|
| 1346 | rx_mac_payload + sizeof(mac_header_80211), |
---|
| 1347 | rx_length - sizeof(mac_header_80211)); |
---|
| 1348 | |
---|
| 1349 | // Fill in the metadata |
---|
| 1350 | tx_queue_buffer->flags = 0; |
---|
| 1351 | tx_queue_buffer->length = rx_length; |
---|
| 1352 | tx_queue_buffer->seg0_len = rx_length; |
---|
| 1353 | tx_queue_buffer->seg1_len = 0; |
---|
| 1354 | tx_queue_buffer->seg1_offset = 0; |
---|
| 1355 | tx_queue_buffer->station_info = station_info_create(rx_80211_header->address_3); |
---|
| 1356 | |
---|
| 1357 | // Make sure the DMA transfer is complete |
---|
| 1358 | wlan_mac_high_cdma_finish_transfer(); |
---|
| 1359 | |
---|
| 1360 | // Put the packet in the queue |
---|
| 1361 | wlan_mac_enqueue_wireless_tx(mcast_qid, tx_queue_entry); |
---|
| 1362 | |
---|
| 1363 | } |
---|
| 1364 | } else { |
---|
| 1365 | // Packet is not a multicast packet. Check if it is destined for one of our stations |
---|
| 1366 | if(active_network_info != NULL){ |
---|
| 1367 | associated_station_entry = station_info_find_by_addr(rx_80211_header->address_3, &active_network_info->members); |
---|
| 1368 | } |
---|
| 1369 | if(associated_station_entry != NULL){ |
---|
| 1370 | associated_station = (station_info_t*)(associated_station_entry->data); |
---|
| 1371 | |
---|
| 1372 | // Send the data packet over the wireless to our station |
---|
| 1373 | tx_queue_entry = queue_checkout(); |
---|
| 1374 | |
---|
| 1375 | if(tx_queue_entry != NULL){ |
---|
| 1376 | tx_queue_buffer = (tx_80211_queue_buffer_t*)(tx_queue_entry->data); |
---|
| 1377 | |
---|
| 1378 | wlan_create_data_frame_header(tx_queue_buffer->pkt, |
---|
| 1379 | rx_80211_header->address_3, |
---|
| 1380 | wlan_mac_addr, |
---|
| 1381 | rx_80211_header->address_2, |
---|
| 1382 | MAC_FRAME_CTRL2_FLAG_FROM_DS); |
---|
| 1383 | |
---|
| 1384 | // Overwrite packet type with just-received packet type. This will allow |
---|
| 1385 | // relaying of QOSDATA frames |
---|
| 1386 | tx_80211_header = ((mac_header_80211*)(tx_queue_buffer->pkt)); |
---|
| 1387 | tx_80211_header->frame_control_1 = rx_80211_header->frame_control_1; |
---|
| 1388 | |
---|
| 1389 | // Fill in the data |
---|
| 1390 | wlan_mac_high_cdma_start_transfer(tx_queue_buffer->pkt + sizeof(mac_header_80211), |
---|
| 1391 | rx_mac_payload + sizeof(mac_header_80211), |
---|
| 1392 | rx_length - sizeof(mac_header_80211)); |
---|
| 1393 | |
---|
| 1394 | // Fill in the metadata |
---|
| 1395 | tx_queue_buffer->flags = TX_80211_QUEUE_BUFFER_FLAGS_FILL_DURATION; |
---|
| 1396 | tx_queue_buffer->length = rx_length; |
---|
| 1397 | tx_queue_buffer->seg0_len = rx_length; |
---|
| 1398 | tx_queue_buffer->seg1_len = 0; |
---|
| 1399 | tx_queue_buffer->seg1_offset = 0; |
---|
| 1400 | tx_queue_buffer->station_info = associated_station; |
---|
| 1401 | |
---|
| 1402 | // Make sure the DMA transfer is complete |
---|
| 1403 | wlan_mac_high_cdma_finish_transfer(); |
---|
| 1404 | |
---|
| 1405 | // Put the packet in the queue |
---|
| 1406 | wlan_mac_enqueue_wireless_tx(associated_station->QID, tx_queue_entry); |
---|
| 1407 | |
---|
| 1408 | // Given we sent the packet wirelessly to our stations, if we do not allow Ethernet transmissions |
---|
| 1409 | // of wireless transmissions, then do not send over Ethernet |
---|
| 1410 | #ifndef ALLOW_ETH_TX_OF_WIRELESS_TX |
---|
| 1411 | eth_send = 0; |
---|
| 1412 | #endif |
---|
| 1413 | } |
---|
| 1414 | } |
---|
| 1415 | } |
---|
| 1416 | |
---|
| 1417 | // Encapsulate the packet and send over the wired network |
---|
| 1418 | if(eth_send){ |
---|
| 1419 | #if WLAN_SW_CONFIG_ENABLE_ETH_BRIDGE |
---|
| 1420 | wlan_eth_decap_and_send(rx_mac_payload, |
---|
| 1421 | rx_80211_header->address_3, |
---|
| 1422 | rx_80211_header->address_2, |
---|
| 1423 | rx_length, |
---|
| 1424 | 0); |
---|
| 1425 | #endif |
---|
| 1426 | } |
---|
| 1427 | } |
---|
| 1428 | } else { |
---|
| 1429 | // Packet was not from an associated station |
---|
| 1430 | // - Print a WARNING and send a de-authentication to trigger a re-association |
---|
| 1431 | // |
---|
| 1432 | // |
---|
| 1433 | if(unicast_to_me){ |
---|
| 1434 | |
---|
| 1435 | // Received a data frame from a STA that claims to be associated with this AP but is not in the AP association table |
---|
| 1436 | // Discard the MPDU and reply with a de-authentication frame to trigger re-association at the STA |
---|
| 1437 | wlan_printf(PL_WARNING, "Data from non-associated station: [%x %x %x %x %x %x], issuing de-authentication\n", rx_80211_header->address_2[0],rx_80211_header->address_2[1],rx_80211_header->address_2[2],rx_80211_header->address_2[3],rx_80211_header->address_2[4],rx_80211_header->address_2[5]); |
---|
| 1438 | wlan_printf(PL_WARNING, "Address 3: [%x %x %x %x %x %x]\n", rx_80211_header->address_3[0],rx_80211_header->address_3[1],rx_80211_header->address_3[2],rx_80211_header->address_3[3],rx_80211_header->address_3[4],rx_80211_header->address_3[5]); |
---|
| 1439 | |
---|
| 1440 | // Send de-authentication packet to the station |
---|
| 1441 | tx_queue_entry = queue_checkout(); |
---|
| 1442 | |
---|
| 1443 | if(tx_queue_entry != NULL){ |
---|
| 1444 | tx_queue_buffer = (tx_80211_queue_buffer_t*)(tx_queue_entry->data); |
---|
| 1445 | |
---|
| 1446 | tx_length = wlan_create_deauth_frame(tx_queue_buffer->pkt, |
---|
| 1447 | rx_80211_header->address_2, |
---|
| 1448 | wlan_mac_addr, |
---|
| 1449 | wlan_mac_addr, |
---|
| 1450 | DEAUTH_REASON_NONASSOCIATED_STA); |
---|
| 1451 | |
---|
| 1452 | // Fill in metadata |
---|
| 1453 | tx_queue_buffer->length = tx_length; |
---|
| 1454 | tx_queue_buffer->seg0_len = tx_length; |
---|
| 1455 | tx_queue_buffer->seg1_len = 0; |
---|
| 1456 | tx_queue_buffer->seg1_offset = 0; |
---|
| 1457 | tx_queue_buffer->station_info = station_info; |
---|
| 1458 | |
---|
| 1459 | // Put the packet in the queue |
---|
| 1460 | wlan_mac_enqueue_wireless_tx(mgmt_qid, tx_queue_entry); |
---|
| 1461 | } |
---|
| 1462 | } |
---|
| 1463 | } // END if(associated_station != NULL) |
---|
| 1464 | break; |
---|
| 1465 | |
---|
| 1466 | |
---|
| 1467 | //--------------------------------------------------------------------- |
---|
| 1468 | case (MAC_FRAME_CTRL1_SUBTYPE_PROBE_REQ): |
---|
| 1469 | // Probe Request Packet |
---|
| 1470 | // - Check that this packet is to the broadcast address |
---|
| 1471 | // - Look at the tagged parameters |
---|
| 1472 | // - Depending on the parameters, send a probe response |
---|
| 1473 | // |
---|
| 1474 | if(wlan_addr_eq(rx_80211_header->address_3, bcast_addr) || |
---|
| 1475 | wlan_addr_eq(rx_80211_header->address_3, wlan_mac_addr)) { |
---|
| 1476 | mac_payload_ptr_u8 += sizeof(mac_header_80211); |
---|
| 1477 | |
---|
| 1478 | // Loop through tagged parameters |
---|
| 1479 | while(((u32)mac_payload_ptr_u8 - (u32)rx_mac_payload)<= (rx_length - WLAN_PHY_FCS_NBYTES)){ |
---|
| 1480 | |
---|
| 1481 | // What kind of tag is this? |
---|
| 1482 | switch(mac_payload_ptr_u8[0]){ |
---|
| 1483 | //----------------------------------------------------- |
---|
| 1484 | case MGMT_TAG_SSID: |
---|
| 1485 | // SSID parameter set |
---|
| 1486 | if((active_network_info != NULL) && |
---|
| 1487 | ((mac_payload_ptr_u8[1]==0) || // Wildcard SSID is zero-length |
---|
| 1488 | ((mac_payload_ptr_u8[1] == strnlen(active_network_info->bss_config.ssid, SSID_LEN_MAX)) && // Check for equal lengths first |
---|
| 1489 | (memcmp(mac_payload_ptr_u8+2, (u8*)active_network_info->bss_config.ssid, mac_payload_ptr_u8[1])==0)))) { |
---|
| 1490 | // Send response if Probe Request contained wildcard SSID |
---|
| 1491 | // or SSID matching the SSID of this AP's BSS |
---|
| 1492 | send_response = 1; |
---|
| 1493 | } |
---|
| 1494 | break; |
---|
| 1495 | |
---|
| 1496 | //----------------------------------------------------- |
---|
| 1497 | case MGMT_TAG_SUPPORTED_RATES: |
---|
| 1498 | // Supported rates |
---|
| 1499 | break; |
---|
| 1500 | |
---|
| 1501 | //----------------------------------------------------- |
---|
| 1502 | case MGMT_TAG_EXTENDED_SUPPORTED_RATES: |
---|
| 1503 | // Extended supported rates |
---|
| 1504 | break; |
---|
| 1505 | |
---|
| 1506 | //----------------------------------------------------- |
---|
| 1507 | case MGMT_TAG_DSSS_PARAMETER_SET: |
---|
| 1508 | // DS Parameter set (e.g. channel) |
---|
| 1509 | break; |
---|
| 1510 | } |
---|
| 1511 | |
---|
| 1512 | // Move up to the next tag |
---|
| 1513 | mac_payload_ptr_u8 += mac_payload_ptr_u8[1]+2; |
---|
| 1514 | } |
---|
| 1515 | |
---|
| 1516 | if((active_network_info != NULL) && send_response) { |
---|
| 1517 | |
---|
| 1518 | // Create a probe response frame |
---|
| 1519 | tx_queue_entry = queue_checkout(); |
---|
| 1520 | |
---|
| 1521 | if(tx_queue_entry != NULL){ |
---|
| 1522 | tx_queue_buffer = (tx_80211_queue_buffer_t*)(tx_queue_entry->data); |
---|
| 1523 | |
---|
| 1524 | tx_length = wlan_create_probe_resp_frame( tx_queue_buffer->pkt, |
---|
| 1525 | rx_80211_header->address_2, |
---|
| 1526 | wlan_mac_addr, |
---|
| 1527 | wlan_mac_addr, |
---|
| 1528 | active_network_info ); |
---|
| 1529 | |
---|
| 1530 | |
---|
| 1531 | // Fill in metadata |
---|
| 1532 | tx_queue_buffer->flags = TX_80211_QUEUE_BUFFER_FLAGS_FILL_DURATION | TX_80211_QUEUE_BUFFER_FLAGS_FILL_TIMESTAMP; |
---|
| 1533 | tx_queue_buffer->length = tx_length; |
---|
| 1534 | tx_queue_buffer->seg0_len = tx_length; |
---|
| 1535 | tx_queue_buffer->seg1_len = 0; |
---|
| 1536 | tx_queue_buffer->seg1_offset = 0; |
---|
| 1537 | tx_queue_buffer->station_info = station_info; |
---|
| 1538 | |
---|
| 1539 | // Put the packet in the queue |
---|
| 1540 | wlan_mac_enqueue_wireless_tx(mgmt_qid, tx_queue_entry); |
---|
| 1541 | } |
---|
| 1542 | |
---|
| 1543 | // Finish the function |
---|
| 1544 | goto mpdu_rx_process_end; |
---|
| 1545 | } |
---|
| 1546 | } |
---|
| 1547 | break; |
---|
| 1548 | |
---|
| 1549 | |
---|
| 1550 | //--------------------------------------------------------------------- |
---|
| 1551 | case (MAC_FRAME_CTRL1_SUBTYPE_AUTH): |
---|
| 1552 | // Authentication Packet |
---|
| 1553 | // - Check if authentication is allowed (note: if the station |
---|
| 1554 | // - Potentially send authentication response |
---|
| 1555 | // |
---|
| 1556 | if( sta_is_associated || (wlan_addr_eq(rx_80211_header->address_3, wlan_mac_addr) && wlan_mac_addr_filter_is_allowed(rx_80211_header->address_2)) ) { |
---|
| 1557 | mac_payload_ptr_u8 += sizeof(mac_header_80211); |
---|
| 1558 | switch(((authentication_frame*)mac_payload_ptr_u8)->auth_algorithm ){ |
---|
| 1559 | case AUTH_ALGO_OPEN_SYSTEM: |
---|
| 1560 | allow_auth = 1; |
---|
| 1561 | break; |
---|
| 1562 | } |
---|
| 1563 | } |
---|
| 1564 | |
---|
| 1565 | // Only send response if the packet was from a requester |
---|
| 1566 | // |
---|
| 1567 | if((active_network_info != NULL) && ((authentication_frame*)mac_payload_ptr_u8)->auth_sequence == AUTH_SEQ_REQ){ |
---|
| 1568 | |
---|
| 1569 | // Only send response if we are allowing authentication and there is room in the authenticated_unassociated_stations list. |
---|
| 1570 | // Note: the station from which this MAC_FRAME_CTRL1_SUBTYPE_AUTH was received may already be in the authenticated_unassociated_stations |
---|
| 1571 | // list, so this should be accounted for when comparing the list length to MAX_NUM_AUTH |
---|
| 1572 | if(allow_auth && ( (authenticated_unassociated_stations.length-(sta_is_authenticated && (!sta_is_associated))) < MAX_NUM_AUTH ) ){ |
---|
| 1573 | |
---|
| 1574 | //Only proceed if: |
---|
| 1575 | // (1) The authentication type was AUTH_ALGO_OPEN_SYSTEM |
---|
| 1576 | // and |
---|
| 1577 | // (2) The number of currently authenticated stations (not counting this station if it |
---|
| 1578 | // is already authenticated) is less than MAX_NUM_AUTH |
---|
| 1579 | if(sta_is_associated == 0){ |
---|
| 1580 | // This station wasn't already authenticated/associated (state 4), so manually add it to the |
---|
| 1581 | // authenticated/unassociated (state 2) list. |
---|
| 1582 | // - Set ht_capable argument to 0. This will be updated with the correct value when the |
---|
| 1583 | // node moves from the state 2 list during association. |
---|
| 1584 | |
---|
| 1585 | auth_unassoc_station_info = station_info_add_to_list(&authenticated_unassociated_stations, rx_80211_header->address_2); |
---|
| 1586 | |
---|
| 1587 | if(auth_unassoc_station_info != NULL){ |
---|
| 1588 | auth_unassoc_station_info->flags |= STATION_INFO_FLAG_KEEP; |
---|
| 1589 | time_hr_min_sec = wlan_mac_time_to_hr_min_sec(get_system_time_usec()); |
---|
| 1590 | xil_printf("*%dh:%02dm:%02ds* STA %02x:%02x:%02x:%02x:%02x:%02x is now authenticated / unassociated\n", |
---|
| 1591 | time_hr_min_sec.hr, time_hr_min_sec.min, time_hr_min_sec.sec, |
---|
| 1592 | rx_80211_header->address_2[0], rx_80211_header->address_2[1], rx_80211_header->address_2[2], |
---|
| 1593 | rx_80211_header->address_2[3], rx_80211_header->address_2[4], rx_80211_header->address_2[5]); |
---|
| 1594 | } |
---|
| 1595 | } |
---|
| 1596 | |
---|
| 1597 | // Create a successful authentication response frame |
---|
| 1598 | tx_queue_entry = queue_checkout(); |
---|
| 1599 | |
---|
| 1600 | if(tx_queue_entry != NULL){ |
---|
| 1601 | tx_queue_buffer = (tx_80211_queue_buffer_t*)(tx_queue_entry->data); |
---|
| 1602 | |
---|
| 1603 | tx_length = wlan_create_auth_frame( tx_queue_buffer->pkt, |
---|
| 1604 | rx_80211_header->address_2, |
---|
| 1605 | wlan_mac_addr, |
---|
| 1606 | wlan_mac_addr, |
---|
| 1607 | AUTH_ALGO_OPEN_SYSTEM, |
---|
| 1608 | AUTH_SEQ_RESP, |
---|
| 1609 | STATUS_SUCCESS); |
---|
| 1610 | // Fill in metadata |
---|
| 1611 | tx_queue_buffer->flags = TX_80211_QUEUE_BUFFER_FLAGS_FILL_DURATION; |
---|
| 1612 | tx_queue_buffer->length = tx_length; |
---|
| 1613 | tx_queue_buffer->seg0_len = tx_length; |
---|
| 1614 | tx_queue_buffer->seg1_len = 0; |
---|
| 1615 | tx_queue_buffer->seg1_offset = 0; |
---|
| 1616 | tx_queue_buffer->station_info = station_info; |
---|
| 1617 | |
---|
| 1618 | // Put the packet in the queue |
---|
| 1619 | wlan_mac_enqueue_wireless_tx(mgmt_qid, tx_queue_entry); |
---|
| 1620 | } |
---|
| 1621 | |
---|
| 1622 | // Finish the function |
---|
| 1623 | goto mpdu_rx_process_end; |
---|
| 1624 | |
---|
| 1625 | } else { |
---|
| 1626 | // Create a unsuccessful authentication response frame |
---|
| 1627 | tx_queue_entry = queue_checkout(); |
---|
| 1628 | |
---|
| 1629 | if(tx_queue_entry != NULL){ |
---|
| 1630 | tx_queue_buffer = (tx_80211_queue_buffer_t*)(tx_queue_entry->data); |
---|
| 1631 | |
---|
| 1632 | tx_length = wlan_create_auth_frame( tx_queue_buffer->pkt, |
---|
| 1633 | rx_80211_header->address_2, |
---|
| 1634 | wlan_mac_addr, |
---|
| 1635 | wlan_mac_addr, |
---|
| 1636 | AUTH_ALGO_OPEN_SYSTEM, |
---|
| 1637 | AUTH_SEQ_RESP, |
---|
| 1638 | STATUS_AUTH_REJECT_UNSPECIFIED); |
---|
| 1639 | // Fill in metadata |
---|
| 1640 | tx_queue_buffer->flags = TX_80211_QUEUE_BUFFER_FLAGS_FILL_DURATION; |
---|
| 1641 | tx_queue_buffer->length = tx_length; |
---|
| 1642 | tx_queue_buffer->seg0_len = tx_length; |
---|
| 1643 | tx_queue_buffer->seg1_len = 0; |
---|
| 1644 | tx_queue_buffer->seg1_offset = 0; |
---|
| 1645 | tx_queue_buffer->station_info = station_info; |
---|
| 1646 | |
---|
| 1647 | // Put the packet in the queue |
---|
| 1648 | wlan_mac_enqueue_wireless_tx(mgmt_qid, tx_queue_entry); |
---|
| 1649 | } |
---|
| 1650 | } |
---|
| 1651 | |
---|
| 1652 | // Finish the function |
---|
| 1653 | goto mpdu_rx_process_end; |
---|
| 1654 | } |
---|
| 1655 | break; |
---|
| 1656 | |
---|
| 1657 | |
---|
| 1658 | //--------------------------------------------------------------------- |
---|
| 1659 | case (MAC_FRAME_CTRL1_SUBTYPE_ASSOC_REQ): |
---|
| 1660 | case (MAC_FRAME_CTRL1_SUBTYPE_REASSOC_REQ): |
---|
| 1661 | { |
---|
| 1662 | u32 reject_association = 1; |
---|
| 1663 | |
---|
| 1664 | if(station_info != NULL){ |
---|
| 1665 | |
---|
| 1666 | // Association Request / Re-association Request |
---|
| 1667 | |
---|
| 1668 | // Parse the tagged parameters |
---|
| 1669 | mac_payload_ptr_u8 = mac_payload_ptr_u8 + sizeof(mac_header_80211) + sizeof(association_req_frame); |
---|
| 1670 | while ((((u32)mac_payload_ptr_u8) - ((u32)rx_mac_payload)) < (rx_length - WLAN_PHY_FCS_NBYTES)) { |
---|
| 1671 | // Parse each of the tags |
---|
| 1672 | switch(mac_payload_ptr_u8[0]){ |
---|
| 1673 | |
---|
| 1674 | //------------------------------------------------- |
---|
| 1675 | case MGMT_TAG_SSID: |
---|
| 1676 | // SSID parameter set |
---|
| 1677 | // |
---|
| 1678 | strncpy(ssid, (char*)(&(mac_payload_ptr_u8[2])), SSID_LEN_MAX); |
---|
| 1679 | ssid_length = WLAN_MIN(mac_payload_ptr_u8[1],SSID_LEN_MAX); |
---|
| 1680 | break; |
---|
| 1681 | |
---|
| 1682 | |
---|
| 1683 | //------------------------------------------------- |
---|
| 1684 | case MGMT_TAG_HT_CAPABILITIES: |
---|
| 1685 | // This station is capable of HT Tx and Rx |
---|
| 1686 | sta_is_ht_capable = 1; |
---|
| 1687 | break; |
---|
| 1688 | } |
---|
| 1689 | |
---|
| 1690 | // Increment packet pointer to the next tag |
---|
| 1691 | mac_payload_ptr_u8 += mac_payload_ptr_u8[1]+2; |
---|
| 1692 | } |
---|
| 1693 | |
---|
| 1694 | // - Check if the packet is for this BSS. Necessary Criteria: |
---|
| 1695 | // - RA is unicast and directed to this node's wlan_mac_address |
---|
| 1696 | // - SSID string in payload of reception matches this BSS's SSID string |
---|
| 1697 | // - BSSID matches this BSS's ID |
---|
| 1698 | if( unicast_to_me && |
---|
| 1699 | (strncmp(ssid, active_network_info->bss_config.ssid, ssid_length) == 0) && |
---|
| 1700 | (active_network_info != NULL) && wlan_addr_eq(rx_80211_header->address_3, active_network_info->bss_config.bssid)) { |
---|
| 1701 | |
---|
| 1702 | // Check if we have authenticated this TA yet have not associated it. |
---|
| 1703 | // Note: We cannot use the sta_is_authenticated boolean for this, as this also |
---|
| 1704 | // includes fully associated stations. |
---|
| 1705 | |
---|
| 1706 | if( sta_is_associated || (active_network_info->members.length < MAX_NUM_ASSOC) ) reject_association = 0; |
---|
| 1707 | |
---|
| 1708 | if((reject_association == 0) && station_info_is_member(&authenticated_unassociated_stations, station_info)){ |
---|
| 1709 | |
---|
| 1710 | station_info_remove_from_list(&authenticated_unassociated_stations, rx_80211_header->address_2); |
---|
| 1711 | |
---|
| 1712 | // NOTE: The STATION_INFO_FLAG_KEEP bit will still be raised despite having removed the |
---|
| 1713 | // station_info from the authenticated_unassociated_stations list. This is intentional, |
---|
| 1714 | // as we are about to add the station_info the the fully associated list. |
---|
| 1715 | |
---|
| 1716 | // Add the station info |
---|
| 1717 | // - Set ht_capable argument to 0. This will be updated below with the |
---|
| 1718 | // correct value from the tagged parameters in the association request. |
---|
| 1719 | if (network_info_add_member(active_network_info, rx_80211_header->address_2, max_queue_size)) { |
---|
| 1720 | time_hr_min_sec = wlan_mac_time_to_hr_min_sec(get_system_time_usec()); |
---|
| 1721 | xil_printf("*%dh:%02dm:%02ds* STA %02x:%02x:%02x:%02x:%02x:%02x is now associated\n", |
---|
| 1722 | time_hr_min_sec.hr, time_hr_min_sec.min, time_hr_min_sec.sec, |
---|
| 1723 | rx_80211_header->address_2[0], rx_80211_header->address_2[1], rx_80211_header->address_2[2], |
---|
| 1724 | rx_80211_header->address_2[3], rx_80211_header->address_2[4], rx_80211_header->address_2[5]); |
---|
| 1725 | } |
---|
| 1726 | |
---|
| 1727 | wlan_platform_high_userio_disp_status(USERIO_DISP_STATUS_MEMBER_LIST_UPDATE, active_network_info->members.length); |
---|
| 1728 | } |
---|
| 1729 | |
---|
| 1730 | if( reject_association == 0 ) { |
---|
| 1731 | // Zero the HT_CAPABLE flag |
---|
| 1732 | if(sta_is_ht_capable){ |
---|
| 1733 | station_info->capabilities |= STATION_INFO_CAPABILITIES_HT_CAPABLE; |
---|
| 1734 | } else { |
---|
| 1735 | station_info->capabilities &= ~STATION_INFO_CAPABILITIES_HT_CAPABLE; |
---|
| 1736 | } |
---|
| 1737 | |
---|
| 1738 | // Do not allow Mango nodes to time out |
---|
| 1739 | if(wlan_mac_addr_is_mango(rx_80211_header->address_2)){ |
---|
| 1740 | station_info->flags |= STATION_INFO_FLAG_DISABLE_ASSOC_CHECK; |
---|
| 1741 | } |
---|
| 1742 | |
---|
| 1743 | |
---|
| 1744 | // |
---|
| 1745 | // TODO: (Optional) Log association state change |
---|
| 1746 | // |
---|
| 1747 | |
---|
| 1748 | // Create a successful association response frame |
---|
| 1749 | tx_queue_entry = queue_checkout(); |
---|
| 1750 | |
---|
| 1751 | if(tx_queue_entry != NULL){ |
---|
| 1752 | tx_queue_buffer = (tx_80211_queue_buffer_t*)(tx_queue_entry->data); |
---|
| 1753 | |
---|
| 1754 | tx_length = wlan_create_association_response_frame(tx_queue_buffer->pkt, |
---|
| 1755 | rx_80211_header->address_2, |
---|
| 1756 | wlan_mac_addr, |
---|
| 1757 | active_network_info->bss_config.bssid, |
---|
| 1758 | STATUS_SUCCESS, |
---|
| 1759 | station_info->ID, |
---|
| 1760 | active_network_info); |
---|
| 1761 | |
---|
| 1762 | // Fill in metadata |
---|
| 1763 | tx_queue_buffer->flags = TX_80211_QUEUE_BUFFER_FLAGS_FILL_DURATION; |
---|
| 1764 | tx_queue_buffer->length = tx_length; |
---|
| 1765 | tx_queue_buffer->seg0_len = tx_length; |
---|
| 1766 | tx_queue_buffer->seg1_len = 0; |
---|
| 1767 | tx_queue_buffer->seg1_offset = 0; |
---|
| 1768 | tx_queue_buffer->station_info = station_info; |
---|
| 1769 | |
---|
| 1770 | // Put the packet in the queue |
---|
| 1771 | wlan_mac_enqueue_wireless_tx(station_info->QID, tx_queue_entry); |
---|
| 1772 | } |
---|
| 1773 | |
---|
| 1774 | // Finish the function |
---|
| 1775 | goto mpdu_rx_process_end; |
---|
| 1776 | |
---|
| 1777 | } else { |
---|
| 1778 | // Create an unsuccessful association response frame |
---|
| 1779 | tx_queue_entry = queue_checkout(); |
---|
| 1780 | |
---|
| 1781 | if(tx_queue_entry != NULL){ |
---|
| 1782 | tx_queue_buffer = (tx_80211_queue_buffer_t*)(tx_queue_entry->data); |
---|
| 1783 | |
---|
| 1784 | tx_length = wlan_create_association_response_frame(tx_queue_buffer->pkt, |
---|
| 1785 | rx_80211_header->address_2, |
---|
| 1786 | wlan_mac_addr, |
---|
| 1787 | active_network_info->bss_config.bssid, |
---|
| 1788 | STATUS_REJECT_TOO_MANY_ASSOCIATIONS, |
---|
| 1789 | 0, |
---|
| 1790 | active_network_info); |
---|
| 1791 | |
---|
| 1792 | // Fill in metadata |
---|
| 1793 | tx_queue_buffer->flags = TX_80211_QUEUE_BUFFER_FLAGS_FILL_DURATION; |
---|
| 1794 | tx_queue_buffer->length = tx_length; |
---|
| 1795 | tx_queue_buffer->seg0_len = tx_length; |
---|
| 1796 | tx_queue_buffer->seg1_len = 0; |
---|
| 1797 | tx_queue_buffer->seg1_offset = 0; |
---|
| 1798 | tx_queue_buffer->station_info = station_info; |
---|
| 1799 | |
---|
| 1800 | // Put the packet in the queue |
---|
| 1801 | wlan_mac_enqueue_wireless_tx(mgmt_qid, tx_queue_entry); |
---|
| 1802 | |
---|
| 1803 | } |
---|
| 1804 | |
---|
| 1805 | // Finish the function |
---|
| 1806 | goto mpdu_rx_process_end; |
---|
| 1807 | } |
---|
| 1808 | } |
---|
| 1809 | } |
---|
| 1810 | } |
---|
| 1811 | break; |
---|
| 1812 | |
---|
| 1813 | |
---|
| 1814 | //--------------------------------------------------------------------- |
---|
| 1815 | case (MAC_FRAME_CTRL1_SUBTYPE_DISASSOC): |
---|
| 1816 | // Disassociation |
---|
| 1817 | // - Log the association state change |
---|
| 1818 | // - Remove the association and update the display |
---|
| 1819 | // |
---|
| 1820 | if(active_network_info != NULL){ |
---|
| 1821 | |
---|
| 1822 | // Note: Since we are no longer keeping this station_info, we should ensure it is present |
---|
| 1823 | // in neither the fully associated list or the authenticated-only list |
---|
| 1824 | |
---|
| 1825 | if(sta_is_associated){ |
---|
| 1826 | network_info_remove_member(active_network_info, rx_80211_header->address_2); |
---|
| 1827 | } |
---|
| 1828 | |
---|
| 1829 | station_info_remove_from_list(&authenticated_unassociated_stations, rx_80211_header->address_2); |
---|
| 1830 | |
---|
| 1831 | time_hr_min_sec = wlan_mac_time_to_hr_min_sec(get_system_time_usec()); |
---|
| 1832 | |
---|
| 1833 | xil_printf("*%dh:%02dm:%02ds* STA %02x:%02x:%02x:%02x:%02x:%02x has disassociated\n", |
---|
| 1834 | time_hr_min_sec.hr, time_hr_min_sec.min, time_hr_min_sec.sec, |
---|
| 1835 | rx_80211_header->address_2[0], rx_80211_header->address_2[1], rx_80211_header->address_2[2], |
---|
| 1836 | rx_80211_header->address_2[3], rx_80211_header->address_2[4], rx_80211_header->address_2[5]); |
---|
| 1837 | |
---|
| 1838 | // Lower the KEEP flag so that the station_info_ |
---|
| 1839 | if(station_info != NULL) station_info->flags &= ~STATION_INFO_FLAG_KEEP; |
---|
| 1840 | |
---|
| 1841 | wlan_platform_high_userio_disp_status(USERIO_DISP_STATUS_MEMBER_LIST_UPDATE, active_network_info->members.length); |
---|
| 1842 | } |
---|
| 1843 | break; |
---|
| 1844 | |
---|
| 1845 | case (MAC_FRAME_CTRL1_SUBTYPE_NULLDATA): |
---|
| 1846 | break; |
---|
| 1847 | |
---|
| 1848 | //--------------------------------------------------------------------- |
---|
| 1849 | default: |
---|
| 1850 | //This should be left as a verbose print. It occurs often when communicating with mobile devices since they tend to send |
---|
| 1851 | //null data frames (type: DATA, subtype: 0x4) for power management reasons. |
---|
| 1852 | wlan_printf(PL_VERBOSE, "Received unknown frame control type/subtype %x\n",rx_80211_header->frame_control_1); |
---|
| 1853 | |
---|
| 1854 | break; |
---|
| 1855 | } |
---|
| 1856 | } |
---|
| 1857 | |
---|
| 1858 | goto mpdu_rx_process_end; |
---|
| 1859 | |
---|
| 1860 | } else { |
---|
| 1861 | // Process any Bad FCS packets |
---|
| 1862 | goto mpdu_rx_process_end; |
---|
| 1863 | } |
---|
| 1864 | |
---|
| 1865 | // Finish any processing for the RX MPDU process |
---|
| 1866 | mpdu_rx_process_end: |
---|
| 1867 | |
---|
| 1868 | // Currently, asynchronous transmission of log entries is not supported |
---|
| 1869 | // |
---|
| 1870 | // if (rx_event_log_entry != NULL) { |
---|
| 1871 | // wn_transmit_log_entry((void *)rx_event_log_entry); |
---|
| 1872 | // } |
---|
| 1873 | |
---|
| 1874 | return return_val; |
---|
| 1875 | } |
---|
| 1876 | |
---|
| 1877 | |
---|
| 1878 | |
---|
| 1879 | /*****************************************************************************/ |
---|
| 1880 | /** |
---|
| 1881 | * |
---|
| 1882 | *****************************************************************************/ |
---|
| 1883 | void mpdu_dequeue(tx_80211_queue_buffer_t* tx_queue_buffer){ |
---|
| 1884 | mac_header_80211* header; |
---|
| 1885 | station_info_t* station_info; |
---|
| 1886 | |
---|
| 1887 | header = (mac_header_80211*)(tx_queue_buffer->pkt); |
---|
| 1888 | station_info = tx_queue_buffer->station_info; |
---|
| 1889 | |
---|
| 1890 | if(station_info->num_linked_queue_buffer > 1){ |
---|
| 1891 | //If the is more data (in addition to this packet) queued for this station, we can let it know |
---|
| 1892 | //in the frame_control_2 field. |
---|
| 1893 | header->frame_control_2 |= MAC_FRAME_CTRL2_FLAG_MORE_DATA; |
---|
| 1894 | } else { |
---|
| 1895 | header->frame_control_2 &= ~MAC_FRAME_CTRL2_FLAG_MORE_DATA; |
---|
| 1896 | } |
---|
| 1897 | |
---|
| 1898 | } |
---|
| 1899 | |
---|
| 1900 | /*****************************************************************************/ |
---|
| 1901 | /** |
---|
| 1902 | * @brief Deauthenticate given station in the Association Table |
---|
| 1903 | * |
---|
| 1904 | * Deauthenticate the station in the associations table |
---|
| 1905 | * |
---|
| 1906 | * @param station_info_t * station_info |
---|
| 1907 | * - Station to be deauthenticated |
---|
| 1908 | * @return u32 aid |
---|
| 1909 | * - AID of the station that was deauthenticated; AID of 0 is reserved to indicate failure |
---|
| 1910 | *****************************************************************************/ |
---|
| 1911 | u32 deauthenticate_station( station_info_t* station_info ) { |
---|
| 1912 | |
---|
| 1913 | dl_entry* tx_queue_entry; |
---|
| 1914 | tx_80211_queue_buffer_t* tx_queue_buffer; |
---|
| 1915 | u32 tx_length; |
---|
| 1916 | u32 aid; |
---|
| 1917 | time_hr_min_sec_t time_hr_min_sec; |
---|
| 1918 | |
---|
| 1919 | if((active_network_info == NULL) || (station_info == NULL)){ |
---|
| 1920 | return 0; |
---|
| 1921 | } |
---|
| 1922 | |
---|
| 1923 | // Get the AID |
---|
| 1924 | aid = station_info->ID; |
---|
| 1925 | |
---|
| 1926 | // Send De-authentication packet |
---|
| 1927 | tx_queue_entry = queue_checkout(); |
---|
| 1928 | |
---|
| 1929 | if(tx_queue_entry != NULL){ |
---|
| 1930 | tx_queue_buffer = (tx_80211_queue_buffer_t*)(tx_queue_entry->data); |
---|
| 1931 | |
---|
| 1932 | tx_length = wlan_create_deauth_frame(tx_queue_buffer->pkt, |
---|
| 1933 | station_info->addr, |
---|
| 1934 | wlan_mac_addr, |
---|
| 1935 | wlan_mac_addr, |
---|
| 1936 | DEAUTH_REASON_INACTIVITY); |
---|
| 1937 | |
---|
| 1938 | // Fill in metadata |
---|
| 1939 | tx_queue_buffer->flags = TX_80211_QUEUE_BUFFER_FLAGS_FILL_DURATION; |
---|
| 1940 | tx_queue_buffer->length = tx_length; |
---|
| 1941 | tx_queue_buffer->seg0_len = tx_length; |
---|
| 1942 | tx_queue_buffer->seg1_len = 0; |
---|
| 1943 | tx_queue_buffer->seg1_offset = 0; |
---|
| 1944 | tx_queue_buffer->station_info = station_info; |
---|
| 1945 | |
---|
| 1946 | // Put the packet in the queue |
---|
| 1947 | wlan_mac_enqueue_wireless_tx(mgmt_qid, tx_queue_entry); |
---|
| 1948 | |
---|
| 1949 | // Purge any packets in the queue meant for this node |
---|
| 1950 | wlan_mac_purge_wireless_tx(station_info->QID); |
---|
| 1951 | } |
---|
| 1952 | |
---|
| 1953 | // |
---|
| 1954 | // TODO: (Optional) Log association state change |
---|
| 1955 | // |
---|
| 1956 | |
---|
| 1957 | // Remove this STA from association list |
---|
| 1958 | network_info_remove_member(active_network_info, station_info->addr); |
---|
| 1959 | |
---|
| 1960 | time_hr_min_sec = wlan_mac_time_to_hr_min_sec(get_system_time_usec()); |
---|
| 1961 | |
---|
| 1962 | xil_printf("*%dh:%02dm:%02ds* STA %02x:%02x:%02x:%02x:%02x:%02x has disassociated\n", |
---|
| 1963 | time_hr_min_sec.hr, time_hr_min_sec.min, time_hr_min_sec.sec, |
---|
| 1964 | station_info->addr[0], station_info->addr[1], station_info->addr[2], |
---|
| 1965 | station_info->addr[3], station_info->addr[4], station_info->addr[5]); |
---|
| 1966 | |
---|
| 1967 | // Remove the "keep" flag for this station_info so the framework can cleanup later. |
---|
| 1968 | station_info->flags &= ~STATION_INFO_FLAG_KEEP; |
---|
| 1969 | |
---|
| 1970 | wlan_platform_high_userio_disp_status(USERIO_DISP_STATUS_MEMBER_LIST_UPDATE, active_network_info->members.length); |
---|
| 1971 | |
---|
| 1972 | return aid; |
---|
| 1973 | } |
---|
| 1974 | |
---|
| 1975 | |
---|
| 1976 | |
---|
| 1977 | /*****************************************************************************/ |
---|
| 1978 | /** |
---|
| 1979 | * @brief Deauthenticate all stations in the Association Table |
---|
| 1980 | * |
---|
| 1981 | * Loop through all associations in the table and deauthenticate the stations |
---|
| 1982 | * |
---|
| 1983 | * @param None |
---|
| 1984 | * @return None |
---|
| 1985 | *****************************************************************************/ |
---|
| 1986 | void deauthenticate_all_stations(){ |
---|
| 1987 | interrupt_state_t curr_interrupt_state; |
---|
| 1988 | station_info_t* curr_station_info; |
---|
| 1989 | dl_entry* next_station_info_entry; |
---|
| 1990 | dl_entry* curr_station_info_entry; |
---|
| 1991 | int iter; |
---|
| 1992 | |
---|
| 1993 | if(active_network_info == NULL) return; |
---|
| 1994 | |
---|
| 1995 | iter = active_network_info->members.length; |
---|
| 1996 | curr_interrupt_state = wlan_platform_intc_stop(); |
---|
| 1997 | |
---|
| 1998 | next_station_info_entry = active_network_info->members.first; |
---|
| 1999 | |
---|
| 2000 | // Deauthenticate all stations and remove from the association table |
---|
| 2001 | // |
---|
| 2002 | // NOTE: Cannot use a for loop for this iteration b/c we could remove |
---|
| 2003 | // elements from the list. |
---|
| 2004 | while( (next_station_info_entry != NULL) && (iter-- > 0)){ |
---|
| 2005 | curr_station_info_entry = next_station_info_entry; |
---|
| 2006 | next_station_info_entry = dl_entry_next(curr_station_info_entry); |
---|
| 2007 | curr_station_info = (station_info_t*)(curr_station_info_entry->data); |
---|
| 2008 | deauthenticate_station(curr_station_info); |
---|
| 2009 | } |
---|
| 2010 | |
---|
| 2011 | wlan_platform_intc_set_state(curr_interrupt_state); |
---|
| 2012 | |
---|
| 2013 | } |
---|
| 2014 | |
---|
| 2015 | /*****************************************************************************/ |
---|
| 2016 | /** |
---|
| 2017 | * @brief Handle a reboot of CPU_LOW |
---|
| 2018 | * |
---|
| 2019 | * If CPU_LOW reboots, any parameters we had previously set in it will be lost. |
---|
| 2020 | * This function is called to tell us that we should re-apply any previous |
---|
| 2021 | * parameters we had set. |
---|
| 2022 | * |
---|
| 2023 | * @param u32 type - type of MAC running in CPU_LOW |
---|
| 2024 | * @return None |
---|
| 2025 | *****************************************************************************/ |
---|
| 2026 | void handle_cpu_low_reboot(u32 type){ |
---|
| 2027 | |
---|
| 2028 | if(type & WLAN_EXP_LOW_SW_ID_DCF) { |
---|
| 2029 | gl_cpu_low_supports_dtim_mcast = 1; |
---|
| 2030 | } else { |
---|
| 2031 | gl_cpu_low_supports_dtim_mcast = 0; |
---|
| 2032 | } |
---|
| 2033 | |
---|
| 2034 | if(active_network_info != NULL){ |
---|
| 2035 | // Re-apply any Beacon Tx configurations |
---|
| 2036 | wlan_mac_high_config_txrx_beacon(&gl_beacon_txrx_config); |
---|
| 2037 | |
---|
| 2038 | // Re-apply DTIM mcast buffering settings |
---|
| 2039 | wlan_mac_high_enable_mcast_buffering(gl_dtim_mcast_buffer_enable); |
---|
| 2040 | } |
---|
| 2041 | } |
---|
| 2042 | |
---|
| 2043 | /*****************************************************************************/ |
---|
| 2044 | /** |
---|
| 2045 | * |
---|
| 2046 | *****************************************************************************/ |
---|
| 2047 | u32 configure_bss(bss_config_t* bss_config, u32 update_mask){ |
---|
| 2048 | u32 return_status = 0; |
---|
| 2049 | u8 update_beacon_template = 0; |
---|
| 2050 | u8 send_beacon_config_to_low = 0; |
---|
| 2051 | u8 send_channel_switch_to_low = 0; |
---|
| 2052 | |
---|
| 2053 | network_info_t* local_network_info; |
---|
| 2054 | interrupt_state_t curr_interrupt_state; |
---|
| 2055 | station_info_t* curr_station_info; |
---|
| 2056 | dl_entry* next_station_info_entry; |
---|
| 2057 | dl_entry* curr_station_info_entry; |
---|
| 2058 | int iter; |
---|
| 2059 | time_hr_min_sec_t time_hr_min_sec; |
---|
| 2060 | tx_params_t default_beacon_tx_params; |
---|
| 2061 | |
---|
| 2062 | //--------------------------------------------------------- |
---|
| 2063 | // 1. Check for any invalid inputs or combination of inputs |
---|
| 2064 | // First verify the requested update to the BSS configuration before |
---|
| 2065 | // modifying anything. This will prevent a partial update of BSS |
---|
| 2066 | // configuration with valid parameters before discovering an invalid |
---|
| 2067 | // parameter. Furthermore, we can update the arguments to this function |
---|
| 2068 | // with any relevant default values in the case that the arguments |
---|
| 2069 | // are not updated directly by the call to this function and the |
---|
| 2070 | // active_network_info is NULL, preventing us from inhering whatever |
---|
| 2071 | // might be there. |
---|
| 2072 | |
---|
| 2073 | if (bss_config != NULL){ |
---|
| 2074 | ////////////////// |
---|
| 2075 | if (update_mask & BSS_FIELD_MASK_BSSID) { |
---|
| 2076 | if (wlan_addr_eq(bss_config->bssid, zero_addr) == 0) { |
---|
| 2077 | if ((active_network_info != NULL) && wlan_addr_eq(bss_config->bssid, active_network_info->bss_config.bssid)) { |
---|
| 2078 | // The caller of this function claimed that it was updating the BSSID, |
---|
| 2079 | // but the new BSSID matches the one already specified in active_bss_info. |
---|
| 2080 | // Complete the rest of this function as if that bit in the update mask |
---|
| 2081 | // were not set |
---|
| 2082 | update_mask &= ~BSS_FIELD_MASK_BSSID; |
---|
| 2083 | } else { |
---|
| 2084 | // Changing the BSSID, perform necessary argument checks |
---|
| 2085 | if (wlan_addr_eq(bss_config->bssid, wlan_mac_addr) == 0) { |
---|
| 2086 | // In the AP implementation, the BSSID provided must be |
---|
| 2087 | // the hardware MAC address of the node |
---|
| 2088 | return_status |= BSS_CONFIG_FAILURE_BSSID_INVALID; |
---|
| 2089 | } |
---|
| 2090 | if (((update_mask & BSS_FIELD_MASK_SSID) == 0) || |
---|
| 2091 | ((update_mask & BSS_FIELD_MASK_CHAN) == 0) || |
---|
| 2092 | ((update_mask & BSS_FIELD_MASK_BEACON_INTERVAL) == 0)) { |
---|
| 2093 | return_status |= BSS_CONFIG_FAILURE_BSSID_INSUFFICIENT_ARGUMENTS; |
---|
| 2094 | } |
---|
| 2095 | } |
---|
| 2096 | } |
---|
| 2097 | } else { |
---|
| 2098 | if (active_network_info == NULL) { |
---|
| 2099 | // Cannot update BSS without specifying BSSID |
---|
| 2100 | return_status |= BSS_CONFIG_FAILURE_BSSID_INSUFFICIENT_ARGUMENTS; |
---|
| 2101 | } |
---|
| 2102 | } |
---|
| 2103 | ////////////////// |
---|
| 2104 | if (update_mask & BSS_FIELD_MASK_CHAN) { |
---|
| 2105 | if (wlan_verify_channel( |
---|
| 2106 | wlan_mac_high_bss_channel_spec_to_radio_chan(bss_config->chan_spec)) != WLAN_SUCCESS) { |
---|
| 2107 | return_status |= BSS_CONFIG_FAILURE_CHANNEL_INVALID; |
---|
| 2108 | } |
---|
| 2109 | } |
---|
| 2110 | ////////////////// |
---|
| 2111 | if (update_mask & BSS_FIELD_MASK_BEACON_INTERVAL) { |
---|
| 2112 | if ((bss_config->beacon_interval != BEACON_INTERVAL_NO_BEACON_TX) && |
---|
| 2113 | (bss_config->beacon_interval < 10)) { |
---|
| 2114 | return_status |= BSS_CONFIG_FAILURE_BEACON_INTERVAL_INVALID; |
---|
| 2115 | } |
---|
| 2116 | } |
---|
| 2117 | ////////////////// |
---|
| 2118 | if (update_mask & BSS_FIELD_MASK_HT_CAPABLE) { |
---|
| 2119 | if (bss_config->ht_capable > 1) { |
---|
| 2120 | return_status |= BSS_CONFIG_FAILURE_HT_CAPABLE_INVALID; |
---|
| 2121 | } |
---|
| 2122 | } else if(active_network_info == NULL) { |
---|
| 2123 | // Adopt C default value |
---|
| 2124 | bss_config->ht_capable = WLAN_DEFAULT_BSS_CONFIG_HT_CAPABLE; |
---|
| 2125 | update_mask |= BSS_FIELD_MASK_HT_CAPABLE; |
---|
| 2126 | } |
---|
| 2127 | ////////////////// |
---|
| 2128 | if (update_mask & BSS_FIELD_MASK_DTIM_PERIOD) { |
---|
| 2129 | if(bss_config->dtim_period == 0){ |
---|
| 2130 | return_status |= BSS_CONFIG_FAILURE_DTIM_PERIOD_INVALID; |
---|
| 2131 | } |
---|
| 2132 | |
---|
| 2133 | } else if(active_network_info == NULL) { |
---|
| 2134 | // Adopt C default value |
---|
| 2135 | bss_config->dtim_period = WLAN_DEFAULT_BSS_CONFIG_DTIM_PERIOD; |
---|
| 2136 | update_mask |= BSS_FIELD_MASK_DTIM_PERIOD; |
---|
| 2137 | } |
---|
| 2138 | } |
---|
| 2139 | |
---|
| 2140 | if (return_status == 0) { |
---|
| 2141 | //--------------------------------------------------------- |
---|
| 2142 | // 2. Apply BSS configuration changes |
---|
| 2143 | // Now that the provided bss_config_t struct is valid, apply the changes. |
---|
| 2144 | |
---|
| 2145 | // Disable interrupts around these modifications to prevent state |
---|
| 2146 | // changing out from underneath this context while the new BSS |
---|
| 2147 | // configuration parameters are only partially updated. |
---|
| 2148 | curr_interrupt_state = wlan_platform_intc_stop(); |
---|
| 2149 | |
---|
| 2150 | if ((bss_config == NULL) || (update_mask & BSS_FIELD_MASK_BSSID)) { |
---|
| 2151 | // Adopting a new BSSID. This could mean either |
---|
| 2152 | // 1) Shutting the BSS down |
---|
| 2153 | // or 2) Shutting the BSS down and then starting a new BSS. |
---|
| 2154 | // |
---|
| 2155 | // In either case, first remove any station_info structs |
---|
| 2156 | // that are members of the current active_bss_info and return to |
---|
| 2157 | // a NULL active_bss_info state. |
---|
| 2158 | // |
---|
| 2159 | // This will not result in any OTA transmissions to the stations. |
---|
| 2160 | |
---|
| 2161 | if (active_network_info != NULL) { |
---|
| 2162 | //Purge all tranmissions queues |
---|
| 2163 | purge_all_wireless_tx_queue(); |
---|
| 2164 | |
---|
| 2165 | if ((bss_config == NULL) || |
---|
| 2166 | ((update_mask & BSS_FIELD_MASK_BSSID) && wlan_addr_eq(bss_config->bssid, zero_addr)) ) { |
---|
| 2167 | xil_printf("Terminating BSS\n"); |
---|
| 2168 | } |
---|
| 2169 | |
---|
| 2170 | // Remove all associations |
---|
| 2171 | next_station_info_entry = active_network_info->members.first; |
---|
| 2172 | iter = active_network_info->members.length; |
---|
| 2173 | |
---|
| 2174 | while ((next_station_info_entry != NULL) && (iter-- > 0)) { |
---|
| 2175 | curr_station_info_entry = next_station_info_entry; |
---|
| 2176 | next_station_info_entry = dl_entry_next(curr_station_info_entry); |
---|
| 2177 | |
---|
| 2178 | curr_station_info = (station_info_t*)(curr_station_info_entry->data); |
---|
| 2179 | |
---|
| 2180 | // Remove the associations |
---|
| 2181 | network_info_remove_member(active_network_info, curr_station_info->addr); |
---|
| 2182 | |
---|
| 2183 | time_hr_min_sec = wlan_mac_time_to_hr_min_sec(get_system_time_usec()); |
---|
| 2184 | |
---|
| 2185 | xil_printf("*%dh:%02dm:%02ds* STA %02x:%02x:%02x:%02x:%02x:%02x has disassociated\n", |
---|
| 2186 | time_hr_min_sec.hr, time_hr_min_sec.min, time_hr_min_sec.sec, |
---|
| 2187 | curr_station_info->addr[0], curr_station_info->addr[1], curr_station_info->addr[2], |
---|
| 2188 | curr_station_info->addr[3], curr_station_info->addr[4], curr_station_info->addr[5]); |
---|
| 2189 | |
---|
| 2190 | // Lower KEEP flag so that the MAC High Framework can cleanup |
---|
| 2191 | curr_station_info->flags &= ~STATION_INFO_FLAG_KEEP; |
---|
| 2192 | |
---|
| 2193 | // Update the hex display to show station was removed |
---|
| 2194 | wlan_platform_high_userio_disp_status(USERIO_DISP_STATUS_MEMBER_LIST_UPDATE, active_network_info->members.length); |
---|
| 2195 | } |
---|
| 2196 | |
---|
| 2197 | // Remove the bss_info from the network list |
---|
| 2198 | // - When the AP "leaves" a BSS, the BSS actually no longer exists. Therefore, it should |
---|
| 2199 | // not continue to exist in the network list. |
---|
| 2200 | dl_list* network_info_list = wlan_mac_high_get_network_info_list(); |
---|
| 2201 | network_info_entry_t* network_entry = wlan_mac_high_find_network_info_BSSID(active_network_info->bss_config.bssid); |
---|
| 2202 | |
---|
| 2203 | wlan_mac_high_clear_network_info(active_network_info); |
---|
| 2204 | dl_entry_remove(network_info_list, (dl_entry*)network_entry); |
---|
| 2205 | network_info_checkin(network_entry); |
---|
| 2206 | |
---|
| 2207 | // Set "active_network_info" to NULL |
---|
| 2208 | // - All functions must be able to handle active_network_info = NULL |
---|
| 2209 | active_network_info = NULL; |
---|
| 2210 | |
---|
| 2211 | // Disable beacons immediately |
---|
| 2212 | ((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; |
---|
| 2213 | gl_beacon_txrx_config.beacon_tx_mode = NO_BEACON_TX; |
---|
| 2214 | bzero(gl_beacon_txrx_config.bssid_match, MAC_ADDR_LEN); |
---|
| 2215 | wlan_mac_high_config_txrx_beacon(&gl_beacon_txrx_config); |
---|
| 2216 | |
---|
| 2217 | // Set hex display to "No BSS" |
---|
| 2218 | wlan_platform_high_userio_disp_status(USERIO_DISP_STATUS_MEMBER_LIST_UPDATE, 0xFF); |
---|
| 2219 | } |
---|
| 2220 | |
---|
| 2221 | // (bss_config_update == NULL) is one way to remove the BSS state of the node. This operation |
---|
| 2222 | // was executed just above. Rather that continuing to check non-NULLness of bss_config_update |
---|
| 2223 | // throughout the rest of this function, just re-enable interrupts and return early. |
---|
| 2224 | |
---|
| 2225 | if (bss_config == NULL) { |
---|
| 2226 | wlan_platform_intc_set_state(curr_interrupt_state); |
---|
| 2227 | return return_status; |
---|
| 2228 | } |
---|
| 2229 | |
---|
| 2230 | // active_network_info is guaranteed to be NULL at this point in the code |
---|
| 2231 | // bss_config_update is guaranteed to be non-NULL at this point in the code |
---|
| 2232 | |
---|
| 2233 | // Update BSS |
---|
| 2234 | // - BSSID must not be zero_addr (reserved address) |
---|
| 2235 | if (wlan_addr_eq(bss_config->bssid, zero_addr) == 0) { |
---|
| 2236 | // Stop the scan state machine if it is running |
---|
| 2237 | if (wlan_mac_scan_is_scanning()) { |
---|
| 2238 | wlan_mac_scan_stop(); |
---|
| 2239 | } |
---|
| 2240 | |
---|
| 2241 | // Create a new network_info_t or overwrite an existing one with matching BSSID. |
---|
| 2242 | // Note: The wildcard SSID and 0-valued channel arguments are temporary. Because |
---|
| 2243 | // of the error checking at the top of this function, the bss_config will |
---|
| 2244 | // contain a valid SSID as well as channel. These fields will be updated |
---|
| 2245 | // in step 3). |
---|
| 2246 | local_network_info = wlan_mac_high_create_network_info(bss_config->bssid, "", 0); |
---|
| 2247 | |
---|
| 2248 | if (local_network_info != NULL) { |
---|
| 2249 | local_network_info->flags |= NETWORK_FLAGS_KEEP; |
---|
| 2250 | |
---|
| 2251 | local_network_info->capabilities = (BSS_CAPABILITIES_ESS); |
---|
| 2252 | |
---|
| 2253 | active_network_info = local_network_info; |
---|
| 2254 | } |
---|
| 2255 | |
---|
| 2256 | // Set hex display |
---|
| 2257 | wlan_platform_high_userio_disp_status(USERIO_DISP_STATUS_MEMBER_LIST_UPDATE, active_network_info->members.length); |
---|
| 2258 | } |
---|
| 2259 | } |
---|
| 2260 | |
---|
| 2261 | //--------------------------------------------------------- |
---|
| 2262 | // 3. Clean up |
---|
| 2263 | // Now that active_network_info has been updated, CPU_HIGH can communicate |
---|
| 2264 | // the changes to CPU_LOW so that the node is tuned to the correct channel, |
---|
| 2265 | // send beacons at the correct interval, and update the beacon |
---|
| 2266 | // template packet buffer. |
---|
| 2267 | if (active_network_info != NULL) { |
---|
| 2268 | |
---|
| 2269 | if (update_mask & BSS_FIELD_MASK_CHAN) { |
---|
| 2270 | active_network_info->bss_config.chan_spec = bss_config->chan_spec; |
---|
| 2271 | send_channel_switch_to_low = 1; |
---|
| 2272 | update_beacon_template = 1; |
---|
| 2273 | } |
---|
| 2274 | if (update_mask & BSS_FIELD_MASK_SSID) { |
---|
| 2275 | strncpy(active_network_info->bss_config.ssid, bss_config->ssid, SSID_LEN_MAX); |
---|
| 2276 | update_beacon_template = 1; |
---|
| 2277 | } |
---|
| 2278 | if (update_mask & BSS_FIELD_MASK_BEACON_INTERVAL) { |
---|
| 2279 | active_network_info->bss_config.beacon_interval = bss_config->beacon_interval; |
---|
| 2280 | memcpy(gl_beacon_txrx_config.bssid_match, active_network_info->bss_config.bssid, MAC_ADDR_LEN); |
---|
| 2281 | if ((active_network_info->bss_config.beacon_interval == BEACON_INTERVAL_NO_BEACON_TX) || |
---|
| 2282 | (active_network_info->bss_config.beacon_interval == BEACON_INTERVAL_UNKNOWN)) { |
---|
| 2283 | ((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; |
---|
| 2284 | gl_beacon_txrx_config.beacon_tx_mode = NO_BEACON_TX; |
---|
| 2285 | } else { |
---|
| 2286 | gl_beacon_txrx_config.beacon_tx_mode = AP_BEACON_TX; |
---|
| 2287 | } |
---|
| 2288 | |
---|
| 2289 | gl_beacon_txrx_config.beacon_interval_tu = active_network_info->bss_config.beacon_interval; |
---|
| 2290 | gl_beacon_txrx_config.beacon_template_pkt_buf = TX_PKT_BUF_BEACON; |
---|
| 2291 | update_beacon_template = 1; |
---|
| 2292 | send_beacon_config_to_low = 1; |
---|
| 2293 | } |
---|
| 2294 | if (update_mask & BSS_FIELD_MASK_DTIM_PERIOD) { |
---|
| 2295 | gl_beacon_txrx_config.dtim_period = bss_config->dtim_period; |
---|
| 2296 | active_network_info->bss_config.dtim_period = bss_config->dtim_period; |
---|
| 2297 | send_beacon_config_to_low = 1; |
---|
| 2298 | } |
---|
| 2299 | if (update_mask & BSS_FIELD_MASK_HT_CAPABLE) { |
---|
| 2300 | // Changing the BSS HT_CAPABLE capabilities only affects what is advertised in |
---|
| 2301 | // the BSS beacons. It does not affect the HT capabilities of nodes in the |
---|
| 2302 | // network. It should also not change any of the default TX params since the |
---|
| 2303 | // AP is still capable of sending and receiving HT packets. |
---|
| 2304 | |
---|
| 2305 | active_network_info->bss_config.ht_capable = bss_config->ht_capable; |
---|
| 2306 | |
---|
| 2307 | // Update the beacon template to match capabilities |
---|
| 2308 | update_beacon_template = 1; |
---|
| 2309 | } |
---|
| 2310 | |
---|
| 2311 | // Update the beacon template |
---|
| 2312 | // In the event that CPU_LOW currently has the beacon packet buffer locked, |
---|
| 2313 | // block for now until it unlocks. This will guarantee that beacon are updated |
---|
| 2314 | // before the function returns. |
---|
| 2315 | default_beacon_tx_params = wlan_mac_get_default_tx_params(mcast_mgmt); |
---|
| 2316 | if (update_beacon_template) { |
---|
| 2317 | |
---|
| 2318 | while( wlan_mac_high_configure_beacon_tx_template((u8*)bcast_addr, |
---|
| 2319 | wlan_mac_addr, |
---|
| 2320 | active_network_info->bss_config.bssid, |
---|
| 2321 | active_network_info, |
---|
| 2322 | &default_beacon_tx_params, |
---|
| 2323 | TX_FRAME_INFO_FLAGS_FILL_TIMESTAMP | TX_FRAME_INFO_FLAGS_WAIT_FOR_LOCK) != 0 ){} |
---|
| 2324 | |
---|
| 2325 | mgmt_tag_tim_template = NULL; |
---|
| 2326 | //Add the TIM tag |
---|
| 2327 | update_tim_tag_all(SCHEDULE_ID_RESERVED_MAX); |
---|
| 2328 | } |
---|
| 2329 | |
---|
| 2330 | // Update the channel |
---|
| 2331 | if (send_channel_switch_to_low) { |
---|
| 2332 | wlan_mac_high_set_radio_channel( |
---|
| 2333 | wlan_mac_high_bss_channel_spec_to_radio_chan(active_network_info->bss_config.chan_spec)); |
---|
| 2334 | } |
---|
| 2335 | |
---|
| 2336 | // Update Beacon configuration |
---|
| 2337 | if (send_beacon_config_to_low) { |
---|
| 2338 | wlan_mac_high_config_txrx_beacon(&gl_beacon_txrx_config); |
---|
| 2339 | } |
---|
| 2340 | |
---|
| 2341 | // Print new BSS information |
---|
| 2342 | xil_printf("BSS Details: \n"); |
---|
| 2343 | xil_printf(" BSSID : %02x-%02x-%02x-%02x-%02x-%02x\n", active_network_info->bss_config.bssid[0],active_network_info->bss_config.bssid[1], |
---|
| 2344 | active_network_info->bss_config.bssid[2],active_network_info->bss_config.bssid[3], |
---|
| 2345 | active_network_info->bss_config.bssid[4],active_network_info->bss_config.bssid[5]); |
---|
| 2346 | xil_printf(" SSID : %s\n", active_network_info->bss_config.ssid); |
---|
| 2347 | xil_printf(" Channel : %d\n", wlan_mac_high_bss_channel_spec_to_radio_chan(active_network_info->bss_config.chan_spec)); |
---|
| 2348 | if (active_network_info->bss_config.beacon_interval == BEACON_INTERVAL_NO_BEACON_TX) { |
---|
| 2349 | xil_printf(" Beacon Interval: No Beacon Tx\n"); |
---|
| 2350 | } else if (active_network_info->bss_config.beacon_interval == BEACON_INTERVAL_UNKNOWN) { |
---|
| 2351 | xil_printf(" Beacon Interval: Unknown\n"); |
---|
| 2352 | } else { |
---|
| 2353 | xil_printf(" Beacon Interval: %d TU (%d us)\n", active_network_info->bss_config.beacon_interval, active_network_info->bss_config.beacon_interval*1024); |
---|
| 2354 | } |
---|
| 2355 | } |
---|
| 2356 | |
---|
| 2357 | // Restore interrupts after all BSS changes |
---|
| 2358 | wlan_platform_intc_set_state(curr_interrupt_state); |
---|
| 2359 | } |
---|
| 2360 | |
---|
| 2361 | return return_status; |
---|
| 2362 | } |
---|
| 2363 | |
---|
| 2364 | |
---|
| 2365 | |
---|
| 2366 | /*****************************************************************************/ |
---|
| 2367 | /** |
---|
| 2368 | * @brief Callback to handle push of User I/O button 0 |
---|
| 2369 | * |
---|
| 2370 | * Reference implementation does nothing. |
---|
| 2371 | * |
---|
| 2372 | * @param None |
---|
| 2373 | * @return None |
---|
| 2374 | *****************************************************************************/ |
---|
| 2375 | void button_0_press(){ |
---|
| 2376 | return; |
---|
| 2377 | } |
---|
| 2378 | |
---|
| 2379 | /*****************************************************************************/ |
---|
| 2380 | /** |
---|
| 2381 | * @brief Callback to handle release of User I/O button 0 |
---|
| 2382 | * |
---|
| 2383 | * Reference implementation does nothing. |
---|
| 2384 | * |
---|
| 2385 | * @param None |
---|
| 2386 | * @return None |
---|
| 2387 | *****************************************************************************/ |
---|
| 2388 | void button_0_release(){ |
---|
| 2389 | return; |
---|
| 2390 | } |
---|
| 2391 | |
---|
| 2392 | /*****************************************************************************/ |
---|
| 2393 | /** |
---|
| 2394 | * @brief Accessor methods for global variables |
---|
| 2395 | * |
---|
| 2396 | * These functions will return pointers to global variables |
---|
| 2397 | * |
---|
| 2398 | * @param None |
---|
| 2399 | * @return None |
---|
| 2400 | *****************************************************************************/ |
---|
| 2401 | dl_list* get_network_member_list(){ |
---|
| 2402 | if(active_network_info != NULL){ |
---|
| 2403 | return &(active_network_info->members); |
---|
| 2404 | } else { |
---|
| 2405 | return NULL; |
---|
| 2406 | } |
---|
| 2407 | } |
---|
| 2408 | |
---|
| 2409 | network_info_t* active_network_info_getter(){ return active_network_info; } |
---|
| 2410 | |
---|
| 2411 | #if WLAN_SW_CONFIG_ENABLE_WLAN_EXP |
---|
| 2412 | |
---|
| 2413 | // **************************************************************************** |
---|
| 2414 | // Define MAC Specific User Commands |
---|
| 2415 | // |
---|
| 2416 | // NOTE: All User Command IDs (CMDID_*) must be a 24 bit unique number |
---|
| 2417 | // |
---|
| 2418 | |
---|
| 2419 | //----------------------------------------------- |
---|
| 2420 | // MAC Specific User Commands |
---|
| 2421 | // |
---|
| 2422 | // #define CMDID_USER_<COMMAND_NAME> 0x100000 |
---|
| 2423 | |
---|
| 2424 | |
---|
| 2425 | //----------------------------------------------- |
---|
| 2426 | // MAC Specific User Command Parameters |
---|
| 2427 | // |
---|
| 2428 | // #define CMD_PARAM_USER_<PARAMETER_NAME> 0x00000000 |
---|
| 2429 | |
---|
| 2430 | |
---|
| 2431 | |
---|
| 2432 | /*****************************************************************************/ |
---|
| 2433 | /** |
---|
| 2434 | * Process User Commands |
---|
| 2435 | * |
---|
| 2436 | * This function is part of the WLAN Exp framework and will process the framework- |
---|
| 2437 | * level user commands. This function intentionally does not implement any user |
---|
| 2438 | * commands and it is left to the user to implement any needed functionality. By |
---|
| 2439 | * default, any commands not processed in this function will print an error to the |
---|
| 2440 | * UART. |
---|
| 2441 | * |
---|
| 2442 | * @return int - Status of the command: |
---|
| 2443 | * NO_RESP_SENT - No response has been sent |
---|
| 2444 | * RESP_SENT - A response has been sent |
---|
| 2445 | * |
---|
| 2446 | * @note See on-line documentation for more information: |
---|
| 2447 | * https://warpproject.org/trac/wiki/802.11/wlan_exp/Extending |
---|
| 2448 | * |
---|
| 2449 | *****************************************************************************/ |
---|
| 2450 | int wlan_exp_process_user_cmd(cmd_resp_hdr_t* cmd_hdr, eth_tx_queue_buffer_t* eth_tx_queue_buffer) { |
---|
| 2451 | |
---|
| 2452 | // |
---|
| 2453 | // IMPORTANT ENDIAN NOTES: |
---|
| 2454 | // - command |
---|
| 2455 | // - header - Already endian swapped by the framework (safe to access directly) |
---|
| 2456 | // - args - Must be endian swapped as necessary by code (framework does not know the contents of the command) |
---|
| 2457 | // - response |
---|
| 2458 | // - header - Will be endian swapped by the framework (safe to write directly) |
---|
| 2459 | // - args - Must be endian swapped as necessary by code (framework does not know the contents of the response) |
---|
| 2460 | // |
---|
| 2461 | |
---|
| 2462 | // Standard variables |
---|
| 2463 | // |
---|
| 2464 | // Used for accessing command arguments and constructing the command response header/payload |
---|
| 2465 | // |
---|
| 2466 | // NOTE: Some of the standard variables below have been commented out. This was to remove |
---|
| 2467 | // compiler warnings for "unused variables" since the default implementation is empty. As |
---|
| 2468 | // you add commands, you should un-comment the standard variables. |
---|
| 2469 | // |
---|
| 2470 | |
---|
| 2471 | u32 resp_sent = NO_RESP_SENT; |
---|
| 2472 | u32 cmd_id = CMD_TO_CMDID(cmd_hdr->cmd); |
---|
| 2473 | #if 0 |
---|
| 2474 | // Segment 0 length includes a fully formed command response header |
---|
| 2475 | // because one was created with default values suitable for a responseless |
---|
| 2476 | // acknowledgment. |
---|
| 2477 | cmd_resp_hdr_t* resp_hdr = (cmd_resp_hdr_t*)(eth_tx_queue_buffer->seg0 |
---|
| 2478 | + eth_tx_queue_buffer->seg0_len |
---|
| 2479 | - sizeof(cmd_resp_hdr_t)); |
---|
| 2480 | |
---|
| 2481 | u32* cmd_args_32 = (u32*)((u8*)cmd_hdr + sizeof(cmd_resp_hdr_t)); |
---|
| 2482 | #endif |
---|
| 2483 | |
---|
| 2484 | switch(cmd_id){ |
---|
| 2485 | |
---|
| 2486 | //----------------------------------------------------------------------------- |
---|
| 2487 | // MAC Specific User Commands |
---|
| 2488 | //----------------------------------------------------------------------------- |
---|
| 2489 | |
---|
| 2490 | // Template framework for a Command |
---|
| 2491 | // |
---|
| 2492 | // NOTE: The WLAN Exp framework assumes that the Over-the-Wire format of the data is |
---|
| 2493 | // big endian. However, the node processes data using little endian. Therefore, |
---|
| 2494 | // any data received from the host must be properly endian-swapped and similarly, |
---|
| 2495 | // any data sent to the host must be properly endian-swapped. The built-in Xilinx |
---|
| 2496 | // functions: Xil_Ntohl() (Network to Host) and Xil_Htonl() (Host to Network) are |
---|
| 2497 | // used for this. |
---|
| 2498 | // |
---|
| 2499 | #if 0 |
---|
| 2500 | //--------------------------------------------------------------------- |
---|
| 2501 | case CMDID_USER_<COMMAND_NAME>: { |
---|
| 2502 | // Command Description |
---|
| 2503 | // |
---|
| 2504 | // Message format: |
---|
| 2505 | // cmd_args_32[0:N] Document command arguments from the host |
---|
| 2506 | // |
---|
| 2507 | // Response format: |
---|
| 2508 | // resp_args_32[0:M] Document response arguments from the node |
---|
| 2509 | // |
---|
| 2510 | // NOTE: Variables are declared above. |
---|
| 2511 | // NOTE: Please take care of the endianness of the arguments (see comment above) |
---|
| 2512 | // |
---|
| 2513 | |
---|
| 2514 | // Variables for template command |
---|
| 2515 | int status; |
---|
| 2516 | u32 arg_0; |
---|
| 2517 | interrupt_state_t curr_interrupt_state; |
---|
| 2518 | |
---|
| 2519 | // Initialize variables |
---|
| 2520 | status = CMD_PARAM_SUCCESS; |
---|
| 2521 | arg_0 = Xil_Ntohl(cmd_args_32[0]); // Swap endianness of command argument |
---|
| 2522 | |
---|
| 2523 | // Do something with argument(s) |
---|
| 2524 | xil_printf("Command argument 0: 0x%08x\n", arg_0); |
---|
| 2525 | |
---|
| 2526 | // If necessary, disable interrupts before processing the command |
---|
| 2527 | // Interrupts must be disabled if the command implementation relies on any state that might |
---|
| 2528 | // change during an interrupt service routine. See the user guide for more details |
---|
| 2529 | // https://warpproject.org/trac/wiki/802.11/wlan_exp/Extending |
---|
| 2530 | curr_interrupt_state = wlan_platform_intc_stop(); |
---|
| 2531 | |
---|
| 2532 | // Process command arguments and generate any response payload |
---|
| 2533 | // NOTE: If interrupts were disabled above, take care to avoid any long-running code in this |
---|
| 2534 | // block (i.e. avoid xil_printf()). When interrupts are disabled, CPU High is unable to |
---|
| 2535 | // respond to CPU Low (ie CPU High will not send / receive packets) and execute scheduled |
---|
| 2536 | // tasks, such as LTGs. |
---|
| 2537 | |
---|
| 2538 | // Re-enable interrupts before returning (only do this if wlan_platform_intc_stop() is called above) |
---|
| 2539 | wlan_platform_intc_set_state(curr_interrupt_state); |
---|
| 2540 | |
---|
| 2541 | // Send response |
---|
| 2542 | // NOTE: It is good practice to send a status as the first argument of the response. |
---|
| 2543 | // This way it is easy to determine if the other data in the response is valid. |
---|
| 2544 | // Predefined status values are: CMD_PARAM_SUCCESS, CMD_PARAM_ERROR |
---|
| 2545 | // |
---|
| 2546 | wlan_exp_add_u32_resp_arg(eth_tx_queue_buffer, resp_hdr, status); |
---|
| 2547 | } |
---|
| 2548 | break; |
---|
| 2549 | #endif |
---|
| 2550 | |
---|
| 2551 | |
---|
| 2552 | //--------------------------------------------------------------------- |
---|
| 2553 | default: { |
---|
| 2554 | wlan_exp_printf(WLAN_EXP_PRINT_ERROR, print_type_node, "Unknown AP user command: 0x%x\n", cmd_id); |
---|
| 2555 | } |
---|
| 2556 | break; |
---|
| 2557 | } |
---|
| 2558 | |
---|
| 2559 | return resp_sent; |
---|
| 2560 | } |
---|
| 2561 | |
---|
| 2562 | |
---|
| 2563 | #endif |
---|
| 2564 | |
---|