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/** * Shared MikroTik RouterOS utilities for frontend */ /** * Normalize a comma-separated list by trimming whitespace and removing empty entries * @example normalizeList("eth1, eth2, , eth3") => "eth1,eth2,eth3" */ export function normalizeList(value: string): string { return value .split(',') .map((v) => v.trim()) .filter(Boolean) .join(','); } /** * Parse CIDR notation and extract gateway IP + network CIDR * @param cidr - IP/mask notation (e.g., "192.168.1.1/24") * @returns Object with gateway and networkCidr, or null if invalid * @example parseCidr("192.168.1.1/24") => { gateway: "192.168.1.1", networkCidr: "192.168.1.0/24" } */ export function parseCidr(cidr: string): { gateway: string; networkCidr: string } | null { const [ip, maskStr] = cidr.split('/'); const mask = Number(maskStr); if (!ip || Number.isNaN(mask) || mask < 1 || mask > 32) { return null; } const octets = ip.split('.').map(Number); if (octets.length !== 4 || octets.some((o) => Number.isNaN(o) || o < 0 || o > 255)) { return null; } const ipInt = (octets[0] << 24) + (octets[1] << 16) + (octets[2] << 8) + octets[3]; const maskInt = mask === 0 ? 0 : 0xffffffff << (32 - mask); const networkInt = ipInt & maskInt; const networkOctets = [ (networkInt >> 24) & 255, (networkInt >> 16) & 255, (networkInt >> 8) & 255, networkInt & 255, ]; return { gateway: ip, networkCidr: `${networkOctets.join('.')}/${mask}`, }; }