LQM fixes 2 (#365)

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Tim Wilkinson 2022-05-20 19:23:57 -07:00 committed by GitHub
parent a8b7f8a216
commit 1ceb7b2140
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2 changed files with 41 additions and 26 deletions

View File

@ -24,6 +24,7 @@ CONFIG_BUSYBOX_CONFIG_TELNETD=y
CONFIG_BUSYBOX_DEFAULT_MKSWAP=n
CONFIG_BUSYBOX_CONFIG_MKSWAP=n
CONFIG_BUSYBOX_CONFIG_FEATURE_TOP_INTERACTIVE=y
CONFIG_BUSYBOX_CONFIG_ARPING=y
CONFIG_PACKAGE_dnsmasq=y
CONFIG_PACKAGE_dropbear=y
CONFIG_PACKAGE_iperf3=y

View File

@ -63,6 +63,14 @@ function get_config()
}
end
function is_connected(track)
if track.lastseen >= now then
return true
else
return false
end
end
function should_block(track)
if now > track.pending then
return track.blocks.dtd or track.blocks.signal or track.blocks.distance or track.blocks.user or track.blocks.dup or track.blocks.quality
@ -81,6 +89,14 @@ function only_quality_block(track)
)
end
function should_ping(track)
if track.ip and is_connected(track) and not (track.blocks.dtd or track.blocks.distance or track.blocks.user) then
return true
else
return false
end
end
function update_block(track)
if should_block(track) then
if not track.blocked then
@ -217,7 +233,7 @@ function lqm()
quality = false
},
blocked = false,
snr = snr,
snr = 0,
rev_snr = nil,
avg_snr = 0,
links = {},
@ -244,7 +260,11 @@ function lqm()
end
-- Running average SNR
if track.snr == 0 then
track.snr = snr
else
track.snr = math.ceil(snr_run_avg * track.snr + (1 - snr_run_avg) * snr)
end
-- Running average estimate of link quality
local tx = station.tx_packets
@ -274,12 +294,6 @@ function lqm()
-- Update link tracking state
for _, track in pairs(tracker)
do
-- Clear snr when we've not seen the node this time (disconnected)
if track.lastseen < now then
track.snr = 0
track.rev_snr = nil
end
-- Only refresh remote attributes periodically
if track.ip and (now > track.refresh or track.pending > now) then
track.refresh = now + refresh_timeout
@ -354,9 +368,9 @@ function lqm()
end
end
if is_connected(track) then
-- Update avg snr using both ends (if we have them)
track.avg_snr = (track.snr + (track.rev_snr or track.snr)) / 2
-- Routable
local rt = track.ip and ip.route(track.ip) or nil
if rt and tostring(rt.gw) == track.ip then
@ -364,21 +378,21 @@ function lqm()
else
track.routable = false
end
else
-- Clear snr when we've not seen the node this time (disconnected)
track.snr = 0
track.rev_snr = nil
track.routable = false
end
-- Ping addresses and penalize quality for excessively slow links
if track.ip and not track.blocked then
local sigsock = nixio.socket("inet", "dgram")
sigsock:setopt("socket", "bindtodevice", wlan)
sigsock:setopt("socket", "dontroute", 1)
sigsock:setopt("socket", "rcvtimeo", ping_timeout)
sigsock:connect(track.ip, 8080)
sigsock:send("")
-- There's no actual UDP server at the other end so recv will either timeout and return 'false' if the link is slow,
-- or will error and return 'nil' if there is a node and it send back an ICMP error quickly (which for our purposes is a positive)
if sigsock:recv(0) == false then
if should_ping(track) then
-- Make an arp request to the target ip to see if we get a timely reply. By using ARP we avoid any
-- potential routing issues and avoid any firewall blocks on the other end.
-- Take a penalty if we fail
if os.execute("/usr/sbin/arping -f -w " .. ping_timeout .. " -I " .. wlan .. " " .. track.ip .. " >/dev/null") ~= 0 then
track.tx_quality = math.max(0, math.ceil(track.tx_quality - config.ping_penalty))
end
sigsock:close()
end
-- Inject traffic into links with poor quality