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#!/bin/zsh
# network/stop.sh — reverse of start.sh (BSD-pivot v2)
#
# Releases DHCP leases and unplumbs all configured non-loopback interfaces.
# Best-effort: each command may fail (e.g., interface already torn down,
# dhcpagent already gone) and we continue regardless. ZFS sync happens
# in main.reef after this runs.

set -u
# NOTE: no `set -e` — every step is best-effort during shutdown.

IFCONFIG=/sbin/ifconfig

# Release any DHCP leases first so the server marks them free.
if [[ -d /dev/net ]]; then
    for dev in /dev/net/*(N); do
        link="${dev:t}"
        [[ "$link" == "lo0" ]] && continue
        # `dhcp release` is idempotent — silently no-op if no lease.
        $IFCONFIG "$link" dhcp release 2>/dev/null || true
    done
fi

# Kill the dhcpagent itself. It manages all leases globally, so one kill
# tears down every interface's state at once.
pkill -TERM -x dhcpagent 2>/dev/null || true

# Unplumb. inet6 first (Hammerhead requires this ordering for clean teardown).
if [[ -d /dev/net ]]; then
    for dev in /dev/net/*(N); do
        link="${dev:t}"
        [[ "$link" == "lo0" ]] && continue
        $IFCONFIG "$link" inet6 unplumb 2>/dev/null || true
        $IFCONFIG "$link" unplumb 2>/dev/null || true
    done
fi

exit 0