66 lines
1.6 KiB
Bash
Executable File
66 lines
1.6 KiB
Bash
Executable File
#!/bin/sh
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#
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# Plugin to monitor ARP entries per interface
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#
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# Parameters understood:
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#
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# config (required)
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# autoconf (optional)
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#
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# Made by Sven Hartge (sven AT svenhartge DOT de)
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# change to iproute by Martin89 (martin AT martin89 DOT de)
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#
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#
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#%# family=contrib
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#%# capabilities=autoconf suggest
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case "$1" in
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autoconf)
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# Search for ip
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if which ip >/dev/null; then
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echo 'yes'
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else
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echo "no (missing 'ip' executable)"
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fi
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exit 0
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;;
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suggest)
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if [ ! -r /proc/net/dev ]; then
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exit 1
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fi
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awk '$1~ /^(eth|wlan|ath|ra)[0-9]+(\.[0-9]+)?/ { gsub(":", ""); gsub("\.", "_"); print $1 }' /proc/net/dev
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exit 0
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;;
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config)
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INTERFACE="$(basename $0 | sed 's/^arp_//g' | tr '_' '.')"
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if [ -z "$INTERFACE" ]; then
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exit 1
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fi
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echo "graph_title ARP/NDP entries for $INTERFACE"
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cat <<'EOM'
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graph_args --base 1000 -l 0
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graph_vlabel Entries
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graph_category network
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graph_scale no
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graph_info This graph shows the number of ARP and NDP entries for a interface.
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entries4.label ARP entries
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entries4.info Number of ARP entries
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entries6global.label NDP global entries
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entries6global.info Number of NDP entries for global IPv6 address
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entries6local.label NDP local entries
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entries6local.info Number of NDP entries for link-local IPv6 address (fe80::/64)
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EOM
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exit 0
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;;
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esac
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INTERFACE="$(basename $0 | sed 's/^arp_//g' | tr '_' '.')"
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if [ -z "$INTERFACE" ]; then
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exit 1
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fi
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ip neigh show dev "$INTERFACE" | awk 'BEGIN { a=0; b=0; c=0 }
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/(REACHABLE|DELAY|STALE)/ { if ($1~ /^fe80:/){c++} else{if ($1~ /^[0-9]+\./) {a++} else{b++} } }
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END { print "entries4.value", a "\nentries6global.value", b, "\nentries6local.value", c }'
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