Double-checked, and no, it's not available in the SDK. The dhcpd-implementation in the android sources (http://androidxref.com/4.2.2_r1/xref/external/dhcpcd/) provides it's own implementation of ifaddrs based on traversal of sysfs. I presume it could be copied to NodeJS under the BSD/Apache license referenced in that library, but this should probably be a separate patch.