Function validatePort

src/utils/ssh-config-parser.ts:243–247

* Validate a port number and throw an error if invalid * @param port The port number to validate * @param jumpHostStr The original jump host string for error messages * @throws Error if port is invalid (NaN, <= 0, or > 65535)

(port: number, jumpHostStr: string)

 * @throws Error if port is invalid (NaN, <= 0, or > 65535)
 */
function validatePort(port: number, jumpHostStr: string): void {
  if (isNaN(port) || port <= 0 || port > 65535) {
    throw new Error(`Invalid port number in "${jumpHostStr}": port must be between 1 and 65535`);
  }
}

/**
 * Parse a jump host string in the format [user@]host[:port]