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alfred: make traffic counters absolute

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After a lenghty discussion, we settled on absolute vs. relative values.
Main reasons:

* stateless implementation on node possible
* convertable to relative values by differentiaion on receiver
* missed transmissions only decrease granularity, whereas relative
  values would introduce wrong numbers on integration if values are
  missed
This commit is contained in:
Jan-Philipp Litza 2014-01-16 22:24:57 +01:00
parent 6bf44622dc
commit 50782f759e
1 changed files with 3 additions and 23 deletions
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26
package/gluon-alfred/files/lib/gluon/alfred/announce.sh
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@ -15,28 +15,9 @@ fi
# set defaults
[ -z "$ALFRED_DATA_TYPE" ] && ALFRED_DATA_TYPE=158
[ -z "$NET_IF" ] && NET_IF=br-client
[ -z "$TRAFFIC_FILE" ] && TRAFFIC_FILE=/var/run/traffic
set -e
get_traffic() {
if [ -f "$TRAFFIC_FILE" ]; then
OLD_TIME="$(cut -d' ' -f1 "$TRAFFIC_FILE")"
OLD_RX="$(cut -d' ' -f2 "$TRAFFIC_FILE")"
OLD_TX="$(cut -d' ' -f3 "$TRAFFIC_FILE")"
else
OLD_TIME=0
OLD_RX=0
OLD_TX=0
fi
NEW_TIME="$(cut -d' ' -f1 /proc/uptime)"
NEW_RX="$(cat /sys/class/net/bat0/statistics/rx_bytes)"
NEW_TX="$(cat /sys/class/net/bat0/statistics/tx_bytes)"
echo "$NEW_TIME $NEW_RX $NEW_TX" > "$TRAFFIC_FILE"
echo "$OLD_TIME $OLD_RX $OLD_TX $NEW_TIME $NEW_RX $NEW_TX" |\
awk '{tdiff=$4-$1; print ($5-$2)/tdiff " " ($6-$3)/tdiff;}'
}
json_init
json_add_string "hostname" "$(uci get 'system.@system[0].hostname')"
@ -83,11 +64,10 @@ json_close_object # network
json_add_object "statistics"
json_add_int "uptime" "$(cut -d' ' -f1 /proc/uptime)"
TRAFFIC="$(get_traffic)"
json_add_object "traffic"
json_add_double "rx" "$(echo $TRAFFIC | cut -d' ' -f1)"
json_add_double "tx" "$(echo $TRAFFIC | cut -d' ' -f2)"
json_close_object
json_add_double "rx" "$(cat /sys/class/net/bat0/statistics/rx_bytes)"
json_add_double "tx" "$(cat /sys/class/net/bat0/statistics/tx_bytes)"
json_close_object # traffic
json_close_object # statistics
json_dump | tr -d '\n' | alfred -s "$ALFRED_DATA_TYPE"