New OpenWRT script

snmp/Openwrt/openwrt.sh

@@ -0,0 +1,131 @@
+#!/bin/sh
+
+BASE_OID=".1.3.6.1.4.1.2021.255"
+
+# WL => ascii => 87 76
+WLAP_OID="$BASE_OID.87.76.1"
+WLCLIENT_OID="$BASE_OID.87.76.2"
+WLFRQ_OID="$BASE_OID.87.76.3"
+WLNOISE_OID="$BASE_OID.87.76.4"
+WLRATE_OID="$BASE_OID.87.76.5"
+WLRATE_TX_SUM_OID="$WLRATE_OID.1.1"
+WLRATE_TX_AVG_OID="$WLRATE_OID.1.2"
+WLRATE_TX_MIN_OID="$WLRATE_OID.1.3"
+WLRATE_TX_MAX_OID="$WLRATE_OID.1.4"
+WLRATE_RX_SUM_OID="$WLRATE_OID.2.1"
+WLRATE_RX_AVG_OID="$WLRATE_OID.2.2"
+WLRATE_RX_MIN_OID="$WLRATE_OID.2.3"
+WLRATE_RX_MAX_OID="$WLRATE_OID.2.3"
+WLSNR_OID="$BASE_OID.87.76.6"
+WLSNR_OID_SUM="$WLSNR_OID.1"
+WLSNR_OID_AVG="$WLSNR_OID.2"
+WLSNR_OID_MIN="$WLSNR_OID.3"
+WLSNR_OID_MAX="$WLSNR_OID.4"
+WL_ENTRIES=""
+WL_LASTREFRESH=0
+
+get_wlinfo() {
+  refresh=$(($(date +%s)-$WL_LASTREFRESH))
+  if [ $refresh -lt 30 ]; then
+    return
+  fi
+
+  WL_LASTREFRESH=$(date +%s)
+
+  interfaces=$(iwinfo | grep ESSID | cut -s -d " " -f 1)
+  id=1
+  for interface in $interfaces; do
+    ssid=$(iwinfo $interface info | grep ESSID | cut -s -d ":" -f 2 | sed 's/ //g' | sed 's/"//g')
+    channel=$(iwinfo $interface info | grep Mode | grep Channel | cut -s -d"(" -f 2 | cut -s -d")" -f 1 | sed 's/ //g')
+    clients=$(/usr/sbin/iw dev $interface station dump 2>/dev/null | grep Station | cut -f 2 -s -d" " | wc -l)
+    frequency=$(/usr/sbin/iw dev $interface info 2>/dev/null | grep channel | cut -f 2- -s -d" " | cut -f 2- -s -d"(" | cut -f 1 -s -d" ")
+    noise=$(iwinfo $interface assoclist 2>/dev/null | grep -v "^$" | cut -s -d "/" -f 2 | cut -s -d "(" -f 1 | cut -s -d " " -f 2 | tail -1)
+
+    for dir in "tx" "rx"; do
+      ratelist=$(/usr/sbin/iw dev $interface station dump 2>/dev/null | grep "$dir bitrate" | cut -f 2 -s -d" ")
+      eval rate_${dir}_sum="$(echo "${ratelist}" | awk -F ':' '{sum += $dir} END {printf "%d\n", 1000000*sum}')"
+      eval rate_${dir}_avg="$(echo "${ratelist}" | awk -F ':' '{sum += $dir} END {printf "%d\n", 1000000*sum/NR}')"
+      eval rate_${dir}_min="$(echo "${ratelist}" | awk -F ':' 'NR == 1 || $dir < min {min = $dir} END {printf "%d\n", 1000000*min}')"
+      eval rate_${dir}_max="$(echo "${ratelist}" | awk -F ':' 'NR == 1 || $dir > max {max = $dir} END {printf "%d\n", 1000000*max}')"
+    done
+
+    snrlist=$(iwinfo $interface assoclist 2>/dev/null | cut -s -d "/" -f 2 | cut -s -d "(" -f 2 | cut -s -d " " -f 2 | cut -s -d ")" -f 1)
+    snr_sum=$(echo $snrlist | awk -F ':' '{sum += $interface} END {printf "%d\n", sum}')
+    snr_avg=$(echo $snrlist | awk -F ':' '{sum += $interface} END {printf "%d\n", sum/NR}')
+    snr_min=$(echo $snrlist | awk -F ':' 'NR == 1 || $interface < min {min = $interface} END {printf "%d\n", min}')
+    snr_max=$(echo $snrlist | awk -F ':' 'NR == 1 || $interface > max {max = $interface} END {printf "%d\n", max}')
+
+    WL_ENTRIES="$WL_ENTRIES
+$WLAP_OID.$id|string|$ssid($channel)
+$WLCLIENT_OID.$id|integer|$clients
+$WLFRQ_OID.$id|integer|$frequency
+$WLNOISE_OID.$id|integer|$noise
+$WLRATE_TX_SUM_OID.$id|integer|${rate_tx_sum:-}
+$WLRATE_RX_SUM_OID.$id|integer|${rate_rx_sum:-}
+$WLRATE_TX_AVG_OID.$id|integer|${rate_tx_avg:-}
+$WLRATE_RX_AVG_OID.$id|integer|${rate_rx_avg:-}
+$WLRATE_TX_MIN_OID.$id|integer|${rate_tx_min:-}
+$WLRATE_RX_MIN_OID.$id|integer|${rate_rx_min:-}
+$WLRATE_TX_MAX_OID.$id|integer|${rate_tx_max:-}
+$WLRATE_RX_MAX_OID.$id|integer|${rate_rx_max:-}
+$WLSNR_OID_SUM.$id|integer|$snr_sum
+$WLSNR_OID_AVG.$id|integer|$snr_avg
+$WLSNR_OID_MIN.$id|integer|$snr_min
+$WLSNR_OID_MAX.$id|integer|$snr_max"
+
+    id=$(($id+1))
+  done
+}
+
+while read CMD; do
+  case "$CMD" in		
+    PING)
+      echo PONG
+      ;;
+    get)
+      read REQ
+      found=0
+      get_wlinfo
+      for entry in $WL_ENTRIES; do
+        entry_oid=$(echo "$entry" | cut -d'|' -f1)
+        if [ "$REQ" = "$entry_oid" ]; then
+          echo "$entry_oid"
+          echo "$entry" | cut -d'|' -f2
+          echo "$entry" | cut -d'|' -f3-
+          found=1
+          break
+        fi
+      done
+      [ "$found" = "0" ] && echo "NONE"
+      ;;
+    getnext)
+      read REQ
+      get_wlinfo
+      oids=$(printf '%s\n', "$WL_ENTRIES" | cut -d'|' -f1 | sort)
+      next_req=""
+      for oid in $oids; do
+        if expr "$oid" \> "$REQ" > /dev/null; then
+          next_req=$oid
+          break
+        fi
+      done
+      if [ -n "$next_req" ]; then
+        for entry in $WL_ENTRIES; do
+          entry_oid=$(echo "$entry" | cut -d'|' -f1)
+          if [ "$next_req" = "$entry_oid" ]; then
+            echo "$entry_oid"
+            echo "$entry" | cut -d'|' -f2
+            echo "$entry" | cut -d'|' -f3-
+            break
+          fi
+        done
+      else
+        echo "NONE"
+      fi
+      ;;
+    *)
+      echo "NONE"
+      ;;
+  esac
+done
+