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d2ypp2/scripts/linux/neko_ip_watch.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+SELF_DIR="$(cd "$(dirname "$0")" && pwd)"
+INSTALL_TAG="${INSTALL_TAG:-neko-ip-watch}"
+. "$SELF_DIR/lib/common.sh"
+
+reload_watch_env() {
+  unset ENABLE_NEKO NEKO_IP_WATCH_INTERVAL
+  if [ -f "$STACK_ENV" ]; then
+    set -a
+    . "$STACK_ENV"
+    set +a
+  fi
+  ENABLE_NEKO="${ENABLE_NEKO:-1}"
+  NEKO_IP_WATCH_INTERVAL="${NEKO_IP_WATCH_INTERVAL:-15}"
+}
+
+normalize_interval() {
+  local value="${1:-15}"
+  case "$value" in
+    ''|*[!0-9]*)
+      value=15
+      ;;
+  esac
+  if [ "$value" -lt 5 ]; then
+    value=5
+  fi
+  printf '%s\n' "$value"
+}
+
+running_neko_nat1to1_values() {
+  local name value
+  for name in live-neko-1 live-neko-2 live-neko-3; do
+    if ! docker ps --format '{{.Names}}' 2>/dev/null | grep -qx "$name"; then
+      continue
+    fi
+    value="$(
+      docker inspect "$name" --format '{{range .Config.Env}}{{println .}}{{end}}' 2>/dev/null |
+        awk -F= '/^NEKO_WEBRTC_NAT1TO1=/{print $2; exit}'
+    )"
+    if [ -n "$value" ]; then
+      printf '%s\n' "$value"
+    fi
+  done
+}
+
+maybe_refresh_neko_for_ip_change() {
+  local preferred active interval cooldown active_value
+
+  if [ "${ENABLE_NEKO:-1}" != "1" ] || ! have docker; then
+    return 0
+  fi
+  if ! docker ps --format '{{.Names}}' 2>/dev/null | grep -Eq '^live-neko-[123]$'; then
+    return 0
+  fi
+
+  preferred="$(detect_preferred_lan_ip || true)"
+  if [ -z "$preferred" ]; then
+    return 0
+  fi
+
+  active=""
+  for active_value in $(running_neko_nat1to1_values || true); do
+    [ -n "$active_value" ] || continue
+    if [ "$active_value" != "$preferred" ]; then
+      active="$active_value"
+      break
+    fi
+  done
+  if [ -z "$active" ]; then
+    return 0
+  fi
+
+  interval="$(normalize_interval "${NEKO_IP_WATCH_INTERVAL:-15}")"
+  cooldown="$interval"
+  if [ "$cooldown" -lt 15 ]; then
+    cooldown=15
+  fi
+
+  log "Detected Neko LAN IP drift: container=${active} current=${preferred}; restarting Neko"
+  if bash "$SERVICE_CTL" neko restart; then
+    log "Neko restart finished; refreshed NAT1TO1=${preferred}"
+  else
+    log "WARN: Neko restart failed after LAN IP drift"
+  fi
+  sleep "$cooldown"
+}
+
+main() {
+  load_env
+  reload_watch_env
+  log "Watching Neko LAN IP changes"
+  while true; do
+    reload_watch_env
+    maybe_refresh_neko_for_ip_change
+    sleep "$(normalize_interval "${NEKO_IP_WATCH_INTERVAL:-15}")"
+  done
+}
+
+main "$@"