--- /dev/null
+#ifndef CEPH_IPADDR_H
+#define CEPH_IPADDR_H
+
+/*
+ Find an IP address that is in the wanted subnet.
+
+ If there are multiple matches, the first one is returned; this order
+ is system-dependent and should not be relied on.
+ */
+const struct ifaddrs *find_ip_in_subnet(const struct ifaddrs *addrs,
+ const struct sockaddr *net,
+ unsigned int prefix_len);
+
+
+bool parse_network(const char *s, struct sockaddr_storage *network, unsigned int *prefix_len);
+
+#endif