openclaw/extensions/voice-call/src/proxy-ip.ts

// Voice Call plugin module normalizes proxy IP representations.
export function normalizeProxyIp(value: string | undefined): string | undefined {
  const trimmed = value?.trim();
  if (!trimmed) {
    return undefined;
  }
  const unwrapped =
    trimmed.startsWith("[") && trimmed.endsWith("]") ? trimmed.slice(1, -1) : trimmed;
  const normalized = unwrapped.toLowerCase();
  const mappedIpv4Prefix = "::ffff:";
  if (normalized.startsWith(mappedIpv4Prefix)) {
    const mappedIpv4 = normalized.slice(mappedIpv4Prefix.length);
    if (/^\d{1,3}(?:\.\d{1,3}){3}$/.test(mappedIpv4)) {
      return mappedIpv4;
    }
  }
  return normalized;
}