2 This file is part of GNUnet.
3 Copyright (C) 2009, 2015, 2016, 2017 GNUnet e.V.
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
16 * Code to figure out what our external IPv4 address(es) might
17 * be (external IPv4s are what is seen on the rest of the Internet).
19 * This can be implemented using different methods, and we allow
20 * the main service to be notified about changes to what we believe
21 * is our external IPv4 address.
23 * Note that this is explicitly only about NATed systems; if one
24 * of our network interfaces has a global IP address this does
25 * not count as "external".
27 * @file nat/gnunet-service-nat_externalip.h
28 * @brief Functions for monitoring external IPv4 addresses
29 * @author Christian Grothoff
31 #ifndef GNUNET_SERVICE_NAT_EXTERNALIP_H
32 #define GNUNET_SERVICE_NAT_EXTERNALIP_H
38 * We have changed our opinion about being NATed in the first
39 * place. Adapt our probing.
41 * @param have_nat #GNUNET_YES if we believe we are behind NAT
44 GN_nat_status_changed (int have_nat);
48 * Function we call when we believe our external IPv4 address changed.
51 * @param ip address to add/remove
52 * @param add_remove #GNUNET_YES to add, #GNUNET_NO to remove
55 (*GN_NotifyExternalIPv4Change)(void *cls,
56 const struct in_addr *ip,
61 * Handle to monitor for external IP changes.
63 struct GN_ExternalIPMonitor;
67 * Start monitoring external IPv4 addresses.
69 * @param cb function to call on changes
70 * @param cb_cls closure for @a cb
71 * @return handle to cancel
73 struct GN_ExternalIPMonitor *
74 GN_external_ipv4_monitor_start (GN_NotifyExternalIPv4Change cb,
79 * Stop calling monitor.
81 * @param mon monitor to call
84 GN_external_ipv4_monitor_stop (struct GN_ExternalIPMonitor *mon);