kernel-netlink: Extract shared route handling code in net/ipsec

src/libcharon/plugins/kernel_netlink/kernel_netlink_shared.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2008-2019 Tobias Brunner
+ * Copyright (C) 2008-2020 Tobias Brunner
  * HSR Hochschule fuer Technik Rapperswil
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -130,4 +130,50 @@ void* netlink_reserve(struct nlmsghdr *hdr, int buflen, int type, int len);
  */
 u_int netlink_get_buflen();
 
+/**
+ * Information about an installed route.
+ */
+struct route_entry_t {
+
+	/** Destination net */
+	chunk_t dst_net;
+
+	/** Destination net prefix length */
+	uint8_t prefixlen;
+
+	/** Name of the interface the route is bound to (optional) */
+	char *if_name;
+
+	/** Source IP of the route (virtual IP or %any) */
+	host_t *src_ip;
+
+	/** Gateway for this route (optional) */
+	host_t *gateway;
+
+	/** Whether the route was installed for a passthrough policy */
+	bool pass;
+};
+
+typedef struct route_entry_t route_entry_t;
+
+/**
+ * Destroy a route entry.
+ */
+void route_entry_destroy(route_entry_t *this);
+
+/**
+ * Clone a route entry.
+ */
+route_entry_t *route_entry_clone(const route_entry_t *this);
+
+/**
+ * Hash a route entry (note that this only hashes the destination).
+ */
+u_int route_entry_hash(const route_entry_t *this);
+
+/**
+ * Compare two route entries.
+ */
+bool route_entry_equals(const route_entry_t *a, const route_entry_t *b);
+
 #endif /* KERNEL_NETLINK_SHARED_H_ */