can_bind
.pr_bind = can_bind,
int can_bind(int s, const char *);
ifindex = can_bind(s, ifname);
can_bind(s, ifname);
can_bind(s2, ifname);
ifindex = can_bind(s2, ifname);
can_bind(s1, ifname);
ifindex2 = can_bind(s2, ifname2);
ifindex = can_bind(s1, ifname);
can_bind(s, ifname);
can_bind(s, ifname);
can_bind(s, ifname);