57 lines
1.8 KiB
Bash
57 lines
1.8 KiB
Bash
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#!/bin/sh
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# router-entrypoint.sh
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#
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# Brings up the simulated br-zt bridge that mirrors production: the
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# ZeroTier member interface (here, the container's interface on
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# zt-exit-net) is enslaved to br-zt and its IP is moved onto br-zt. This
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# makes 'ip route ... dev br-zt' actually reach 10.99.12.0/24.
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set -eu
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WIBLAN_CIDR="${ZTG_WIBLAN_CIDR:-10.99.13.0/24}"
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echo "[entrypoint] bringing up br-zt bridge"
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# Find the interface holding 10.99.12.x.
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ZT_IFACE=$(ip -o -4 addr show \
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| awk '$4 ~ /^10\.99\.12\./ {print $2; exit}')
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if [ -z "$ZT_IFACE" ]; then
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echo "[entrypoint] WARNING: no interface in 10.99.12.0/24; tests will fail" >&2
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ZT_IFACE=eth1
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fi
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echo "[entrypoint] ZT-side interface: $ZT_IFACE"
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ip link add name br-zt type bridge 2>/dev/null || true
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ip link set br-zt up
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if [ "$ZT_IFACE" != "br-zt" ]; then
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ADDR=$(ip -o -4 addr show dev "$ZT_IFACE" \
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| awk '$4 ~ /^10\.99\.12\./ {print $4; exit}')
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if [ -n "$ADDR" ]; then
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ip addr del "$ADDR" dev "$ZT_IFACE" 2>/dev/null || true
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ip addr add "$ADDR" dev br-zt
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fi
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ip link set "$ZT_IFACE" master br-zt
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fi
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echo 1 > /proc/sys/net/ipv4/ip_forward
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echo 0 > /proc/sys/net/ipv4/conf/all/send_redirects 2>/dev/null || true
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# Seed the baseline policy routing the production router boots with.
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ip rule del from "$WIBLAN_CIDR" table 100 2>/dev/null || true
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ip rule add from "$WIBLAN_CIDR" table 100 priority 100
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# Seed the current gateway's host route + table 100 default. These mirror
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# what /etc/rc.local installs on boot in production.
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ip route replace 10.99.12.3 dev br-zt
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ip route replace default via 10.99.12.3 dev br-zt table 100
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ip route replace "$WIBLAN_CIDR" dev br-zt table 1
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echo "[entrypoint] baseline state:"
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ip -o -4 addr show dev br-zt
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echo "--- table 100:"
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ip route show table 100
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echo "--- rule:"
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ip rule show
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exec "$@"
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