sd_ipv4ll_set_index  239 src/network/networkd-ipv4ll.c         r = sd_ipv4ll_set_index(link->ipv4ll, link->ifindex);
sd_ipv4ll_set_index   45 src/systemd/sd-ipv4ll.h int sd_ipv4ll_set_index(sd_ipv4ll *ll, int interface_index);