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43 lines
936 B
Plaintext
43 lines
936 B
Plaintext
#
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# Copyright (C) 2018 devolo AG
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#
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# DHCP event happened. it could have added/deleted the default route to the gateway
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# let's look it up and trigger rewrite of guest wifi filter tables when it changed
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# get the first default gateway IP address
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GW=$(ip -6 route show default)
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GW=$(echo ${GW#*via} | cut -d ' ' -f 1)
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if [ -n "$GW" ]; then
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(
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# subshell for new trap context
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ping -6 -q -c 1 -w 1 $GW >/dev/null
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MAC=$(ip -6 neigh show to $GW)
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MAC=$(echo ${MAC#*lladdr} | cut -d ' ' -f 1)
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TMP=
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trap '[ -n "$TMP" ] && rm -f "$TMP"; TMP=' EXIT HUP INT QUIT TERM
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TMP=$(mktemp)
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cat >$TMP <<-EOF
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GW6_IP=$GW
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GW6_MAC=$MAC
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EOF
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# if changed:
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cmp -s /tmp/guestwifi-ipv6 $TMP || {
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mv $TMP /tmp/guestwifi-ipv6
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TMP=
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(
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. /lib/wifi/delos-wifi/20_delos-guest-wifi
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set_delos_guestwifi
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)
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}
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) else
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# if removed:
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rm /tmp/guestwifi-ipv6 2>/dev/null && {
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. /lib/wifi/delos-wifi/20_delos-guest-wifi
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set_delos_guestwifi
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}
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fi
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