/* Get all network interfaces' indices, and store them in *indices. Returns
* the number of indices. If indices is NULL, only returns the number of indices. */
int sd_network_get_ifindices(unsigned **indices);
/* Get all network interfaces' indices, and store them in *indices. Returns
* the number of indices. If indices is NULL, only returns the number of indices. */
int sd_network_get_ifindices(unsigned **indices);