+
+ sk_for_each(sk, node, &udp_hash[num & (UDP_HTABLE_SIZE - 1)])
+ if (inet_sk(sk)->num == num)
+ return 1;
+ return 0;
+}
+
+/**
+ * udp_get_port - common port lookup for IPv4 and IPv6
+ *
+ * @sk: socket struct in question
+ * @snum: port number to look up
+ * @saddr_comp: AF-dependent comparison of bound local IP addresses
+ */
+int udp_get_port(struct sock *sk, unsigned short snum,
+ int (*saddr_cmp)(const struct sock *sk1, const struct sock *sk2))
+{
+ struct hlist_node *node;
+ struct hlist_head *head;