73 lines
1.9 KiB
Bash
Executable File
73 lines
1.9 KiB
Bash
Executable File
#!/bin/bash
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set -Eeuo pipefail
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IFACE=$1
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source /etc/libvirt/hooks/$IFACE || true
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: ${PUBLICMAC:=52:54:00:00:00:11}
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maxprefixv6=64
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maxprefixv4=25
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if [ -z $IP ]; then
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echo "got nothing back from the API"
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exit 10
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fi
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eui64() {
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local macaddr="$1"
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printf "%02x%s" $(( 16#${macaddr:0:2} ^ 2#00000010 )) "${macaddr:2}" \
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| sed -E -e 's/([0-9a-zA-Z]{2})*/0x\0|/g' \
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| tr -d ':\n' \
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| xargs -d '|' \
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printf "fe80::%02x%02x:%02xff:fe%02x:%02x%02x"
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}
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ip link set up ${IFACE}
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ip addr add fe80::1/64 dev ${IFACE}
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arp -i ${IFACE} -Ds 169.254.0.1 ${IFACE} netmask 255.255.255.255 pub
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IFS=',' read -ra IPS <<< "$IP"
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for IP in "${IPS[@]}"; do
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if [[ $IP =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}/([0-9]{2})$ ]]; then ### we got a IPv4 prefix < maxprefixv4
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if [ ${BASH_REMATCH[1]} -lt $maxprefixv4 ]; then
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echo "we don't support such a big customer net?"
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continue
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fi
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if [ ${BASH_REMATCH[1]} -gt 32 ]; then
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echo "prefix is invalid"
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continue
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fi
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echo "we got IPv4 with prefix ${BASH_REMATCH[0]}"
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ip route add ${IP} dev ${IFACE}
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elif [[ $IP =~ ^2604:bbc0:[0-9,a-f,:]{1,444}/([0-9]{2,3})$ ]]; then ### we got a PIv6 prefix < masprefixv6
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if [ ${BASH_REMATCH[1]} -lt $maxprefixv6 ]; then
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echo "we don't support such a big customer net?"
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continue
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fi
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if [ ${BASH_REMATCH[1]} -gt 128 ]; then
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echo "prefix is invalid"
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continue
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fi
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echo "we got IPv6 with prefix ${BASH_REMATCH[0]}"
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ip route add ${IP} dev ${IFACE} via $(eui64 $PUBLICMAC)
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elif [[ $IP =~ ^\ *$ ]]; then
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echo "we just got an empty string. so not gonna do anything. probably due to splitting the comma"
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else
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echo "Unable to detect with what prefix I'm working with"
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exit 10
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fi
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done
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