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270 lines
14 KiB
Bash
270 lines
14 KiB
Bash
#!/bin/sh
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# Copyright (c) 2017 Qualcomm Technologies, Inc.
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# All Rights Reserved.
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# Confidential and Proprietary - Qualcomm Technologies, Inc.
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BACKHAULMGRMON_DEBUG_OUTOUT=0
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. /lib/functions/repacd-plcmon.sh
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. /lib/functions/repacd-wifimon.sh
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backhaulmgr_rate_samples=0
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prev_plc_rate_compare_counter=0 prev_wlan_rate_compare_counter=0
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wlan_rate_consistent_num=0 plc_rate_consistent_num=0
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gw_not_reachable_consistent_num=0
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PingTimeoutsToCAP=0
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# Config Parameters
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config_eval_time_plc=0 select_only_one_backhaul_interface=0
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# PLC parameters
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is_plc_enabled=0 is_plc_connected=0
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is_plc_iface_brought_down=0 is_wlan_ifaces_brought_down=0
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prev_plc_rate=0 force_down_plc_timestamp=''
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prev_wlan_rate=0
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# Emit a message at debug level.
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# input: $1 - the message to log
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__repacd_backhaulmgrmon_debug() {
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local stderr=''
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if [ "$BACKHAULMGRMON_DEBUG_OUTOUT" -gt 0 ]; then
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stderr='-s'
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fi
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logger $stderr -t repacd.backhaulmgrmon -p user.debug "$1"
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}
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# Emit a message at info level.
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__repacd_backhaulmgrmon_info() {
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local stderr=''
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if [ "$BACKHAULMGRMON_DEBUG_OUTOUT" -gt 0 ]; then
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stderr='-s'
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fi
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logger $stderr -t repacd.backhaulmgrmon -p user.info "$1"
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}
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repacd_backhaulmgrmon_init() {
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# First resolve the config parameters.
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config_load repacd
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config_get config_eval_time_plc 'PLCLink' 'PLCBackhaulEvalTime' '1800'
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# Assuming that PLC link is guaranteed than 2G at configured threshold value
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config_get plc_link_threshold_to_2G 'BackhaulMgr' 'PLCLinkThresholdto2G' '60'
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config_get select_only_one_backhaul_interface 'BackhaulMgr' 'SelectOneBackHaulInterfaceInDaisy' '0'
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config_get backhaulmgr_rate_samples 'BackhaulMgr' 'BackHaulMgrRateNumMeasurements' '5'
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config_get PingTimeoutsToCAP 'BackhaulMgr' 'SwitchInterfaceAfterCAPPingTimeouts' '5'
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}
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repacd_backhaulmgrmon_check() {
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if [ "$select_only_one_backhaul_interface" -gt 0 ]; then
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if __repacd_plcmon_is_plc_enabled; then
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local plc_iface_rate=0
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if [ "$is_plc_enabled" -eq 0 ]; then
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__repacd_backhaulmgrmon_debug "PLC is ENABLED"
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is_plc_enabled=1
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fi
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if [ "$IS_GW_REACHABLE" -gt 0 ]; then
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gw_not_reachable_consistent_num=0
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else
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if [ "$curr_root_distance" -eq "$RE_ROOT_AP_DISTANCE_INVALID" ]; then
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gw_not_reachable_consistent_num=$((gw_not_reachable_consistent_num + 1))
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fi
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fi
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if __repacd_plcmon_is_plc_connected plc_iface_rate; then
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if [ "$is_plc_connected" -eq 0 ]; then
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__repacd_backhaulmgrmon_debug "PLC CONNECTED"
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is_plc_connected=1
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fi
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__repacd_backhaulmgrmon_debug "Rate sample: PLC = $plc_iface_rate Mbps"
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# curr_root_distance greater than 1 means the topology is Daisy Chain
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if [ "$curr_root_distance" -gt 1 -a \
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"$curr_root_distance" -ne "$RE_ROOT_AP_DISTANCE_INVALID" ]; then
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# Check whether WLAN association is complete
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if [ "$bssid_assoc_count" -ge "$min_bssid_assoc" ]; then
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# In case of Daisy Chain, evaluate the link rate of available interfaces
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# At this moment WLAN and PLC interfaces are considered,
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# can be extend to other interfaces.
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# Check whether WLAN link rate more than PLC interface
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# For now, Rate to CAP is considered only 5G interface.
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if [ "$rate_to_CAP" -ge "$plc_iface_rate" ]; then
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# Increment the counter for WLAN rate samples
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wlan_rate_consistent_num=$((wlan_rate_consistent_num + 1))
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plc_rate_consistent_num=0
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# Assume that if Rate to CAP is zero and if curr_root_distance greater than 1
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# means 2Gis connected.
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# Assume 2G value would be around 80 - 120 Mbps in real world
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# then bring down PLC interface. In case the threshold value of PLC to 2G
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# interface is configured and if PLC link rate is consistently better than
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# threshold value then select PLC ineterface and bring down WLAN interfaces.
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elif [ "$rate_to_CAP" -eq 0 -a "$plc_iface_rate" -lt "$plc_link_threshold_to_2G" ]; then
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# Increment the counter for WLAN rate samples
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wlan_rate_consistent_num=$((wlan_rate_consistent_num + 1))
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plc_rate_consistent_num=0
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else
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# Increment the counter for PLC rate samples
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plc_rate_consistent_num=$((plc_rate_consistent_num + 1))
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wlan_rate_consistent_num=0
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fi
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# Choosing best uplink interface
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# Bringing down either of the interface avoids loop in SON network.
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if [ "$wlan_rate_consistent_num" -eq "$backhaulmgr_rate_samples" ]; then
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__repacd_backhaulmgrmon_debug "Bringing down PLC interface..."
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__repacd_plcmon_bring_plc_iface_down
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is_plc_iface_brought_down=1
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prev_plc_rate=$plc_iface_rate
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__repacd_wifimon_get_timestamp force_down_plc_timestamp
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wlan_rate_consistent_num=0
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plc_rate_consistent_num=0
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elif [ "$plc_rate_consistent_num" -eq "$backhaulmgr_rate_samples" ]; then
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__repacd_backhaulmgrmon_debug "Bringing down WLAN interface..."
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__repacd_wifimon_bring_iface_down $sta_iface_5g
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__repacd_wifimon_bring_iface_down $sta_iface_24g
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# Bringing down interfaces will not update Wifi assoc count to zero.
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# Backhaul Manager bringing down both 2G and 5G, so update Wifi assoc count to zero.
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bssid_assoc_count=0
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is_wlan_ifaces_brought_down=1
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prev_wlan_rate=$rate_to_CAP
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wlan_rate_consistent_num=0
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plc_rate_consistent_num=0
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fi
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rate_to_CAP=0
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fi
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fi
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if [ "$is_wlan_ifaces_brought_down" -eq 1 ]; then
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# Check if PLC link rate is bad then switch over to WLAN interface
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# and bring up WLAN interface to re-evaluate the Link metrics.
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if [ "$prev_wlan_rate" -gt "$plc_iface_rate" ]; then
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prev_wlan_rate_compare_counter=$((prev_wlan_rate_compare_counter + 1))
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if [ "$prev_wlan_rate_compare_counter" -eq "$backhaulmgr_rate_samples" ]; then
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__repacd_backhaulmgrmon_debug "PLC Link rate ($plc_iface_rate Mbps) is bad than previous rate of WLAN Link ($prev_wlan_rate Mbps)"
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# Check whether WLAN interfaces are in progress of association
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if [ "$bssid_assoc_count" -gt 0 ]; then
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__repacd_backhaulmgrmon_debug "WLAN interfaces are already trying to associate"
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else
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# Only bringup WLAN interfaces if WLAN interfaces are not up
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__repacd_backhaulmgrmon_debug "Bringing up WLAN interface..."
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__repacd_wifimon_bring_iface_up $sta_iface_5g
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__repacd_wifimon_bring_iface_up $sta_iface_24g
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fi
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is_wlan_ifaces_brought_down=0
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prev_wlan_rate_compare_counter=0
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fi
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else
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prev_wlan_rate_compare_counter=0
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fi
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# Check whether Gateway is reachable consitently, if not bringup WLAN interfaces
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if [ "$gw_not_reachable_consistent_num" -eq "$PingTimeoutsToCAP" ]; then
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# Check whether WLAN interfaces are in progress of association
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if [ "$bssid_assoc_count" -gt 0 ]; then
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__repacd_backhaulmgrmon_debug "WLAN interfaces are already trying to associate"
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else
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# Only bringup WLAN interfaces if WLAN interfaces are not up
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__repacd_backhaulmgrmon_debug "Bringing up WLAN interface..."
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__repacd_wifimon_bring_iface_up $sta_iface_5g
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__repacd_wifimon_bring_iface_up $sta_iface_24g
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fi
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is_wlan_ifaces_brought_down=0
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prev_wlan_rate_compare_counter=0
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gw_not_reachable_consistent_num=0
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fi
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elif [ "$gw_not_reachable_consistent_num" -gt 0 ]; then
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# Check whether WLAN associated and bring down PLC interface if Daisy Chain topology is formed
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if [ "$curr_root_distance" -gt 1 -a \
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"$curr_root_distance" -ne "$RE_ROOT_AP_DISTANCE_INVALID" ]; then
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__repacd_backhaulmgrmon_debug "GW ($gw_ip) not reachable thru PLC, Bringing down PLC interface..."
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__repacd_plcmon_bring_plc_iface_down
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is_plc_iface_brought_down=1
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prev_plc_rate=0
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__repacd_wifimon_get_timestamp force_down_plc_timestamp
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wlan_rate_consistent_num=0
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plc_rate_consistent_num=0
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fi
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fi
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else
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if [ "$is_plc_connected" -gt 0 ]; then
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__repacd_backhaulmgrmon_debug "PLC NOT CONNECTED"
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is_plc_connected=0
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fi
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# Try to bringup WLAN ifaces which were brought down earlier by repacd
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# When PLC backhaul connection is lost
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if [ "$is_wlan_ifaces_brought_down" -eq 1 -a \
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"$curr_root_distance" -eq "$RE_ROOT_AP_DISTANCE_INVALID" ]; then
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__repacd_backhaulmgrmon_debug "Bringing up WLAN interface..."
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__repacd_wifimon_bring_iface_up $sta_iface_5g
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__repacd_wifimon_bring_iface_up $sta_iface_24g
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is_wlan_ifaces_brought_down=0
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# PLC not connected means either device is disconnected or
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# repacd brought down PLC interface
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# Check whether PLC is brought down by repacd
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elif [ "$is_plc_iface_brought_down" -eq 1 ]; then
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# if curr_root_distance RE_ROOT_AP_DISTANCE_INVALID means WLAN interfaces were not
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# brought down by repacd but lost connection to CAP,
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# if curr_root_distance 1 means the topology is not Daisy Chain
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# in either of above cases bringup PLC interface
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if [ "$curr_root_distance" -eq "$RE_ROOT_AP_DISTANCE_INVALID" ] || \
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[ "$curr_root_distance" -eq 1 ]; then
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__repacd_backhaulmgrmon_debug "Bringing up PLC interface..."
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__repacd_plcmon_bring_plc_iface_up
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is_plc_iface_brought_down=0
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elif __repacd_wifimon_is_timeout $force_down_plc_timestamp $config_eval_time_plc; then
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__repacd_backhaulmgrmon_debug "Bringing up PLC:eval interval $config_eval_time_plc sec expired"
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__repacd_plcmon_bring_plc_iface_up
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is_plc_iface_brought_down=0
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__repacd_wifimon_get_timestamp force_down_plc_timestamp
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fi
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if [ "$curr_root_distance" -gt 1 ]; then
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# Check if WLAN link rate is bad then switch over to PLC interface
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# and bring up PLC interface to re-evaluate the Link metrics.
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# For now, Rate to CAP is considered only 5G interface, assuming that if
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# Rate to CAP is zero and if curr_root_distance greater than 1 means 2G
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# is connected. Assume 2G value would be around 80 - 120 Mbps in real world
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# then bring down PLC interface. In case the threshold value of PLC to 2G
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# interface is configured and if PLC link rate is consistently better than
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# threshold value then select PLC ineterface and bring down WLAN interfaces.
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if [ "$rate_to_CAP" -eq 0 -a "$prev_plc_rate" -lt "$plc_link_threshold_to_2G" ]; then
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prev_plc_rate_compare_counter=0
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elif [ "$prev_plc_rate" -gt "$rate_to_CAP" ]; then
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prev_plc_rate_compare_counter=$((prev_plc_rate_compare_counter + 1))
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if [ "$prev_plc_rate_compare_counter" -eq "$backhaulmgr_rate_samples" ]; then
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__repacd_backhaulmgrmon_debug "WLAN Link rate ($rate_to_CAP Mbps) is bad than previous rate of PLC Link ($prev_plc_rate Mbps)"
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__repacd_backhaulmgrmon_debug "Bringing up PLC interface..."
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__repacd_plcmon_bring_plc_iface_up
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is_plc_iface_brought_down=0
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prev_plc_rate_compare_counter=0
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fi
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else
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prev_plc_rate_compare_counter=0
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fi
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fi
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rate_to_CAP=0
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fi
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fi
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else
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if [ "$is_plc_enabled" -gt 0 ]; then
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__repacd_backhaulmgrmon_debug "PLC is DISABLED"
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is_plc_enabled=0
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fi
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fi
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fi
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}
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