-static struct sock *inet_lookup_listener_slow(struct net *net,
- const struct hlist_head *head,
- const __be32 daddr,
- const unsigned short hnum,
- const int dif)
-{
- struct sock *result = NULL, *sk;
- const struct hlist_node *node;
- int hiscore = -1;
-
- sk_for_each(sk, node, head) {
- const struct inet_sock *inet = inet_sk(sk);
-
- if (sk->sk_net == net && inet->num == hnum &&
- !ipv6_only_sock(sk)) {
- const __be32 rcv_saddr = inet->rcv_saddr;
- int score = sk->sk_family == PF_INET ? 1 : 0;
-
- if (rcv_saddr) {
- if (rcv_saddr != daddr)
- continue;
- score += 2;
- }
- if (sk->sk_bound_dev_if) {
- if (sk->sk_bound_dev_if != dif)
- continue;
- score += 2;
- }
- if (score == 5)
- return sk;
- if (score > hiscore) {
- hiscore = score;
- result = sk;
- }
- }
- }
- return result;
-}