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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 Affero 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.
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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.
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
18 SPDX-License-Identifier: AGPL3.0-or-later
21 * Code to figure out what our external IPv4 address(es) might
22 * be (external IPv4s are what is seen on the rest of the Internet).
24 * This can be implemented using different methods, and we allow
25 * the main service to be notified about changes to what we believe
26 * is our external IPv4 address.
28 * Note that this is explicitly only about NATed systems; if one
29 * of our network interfaces has a global IP address this does
30 * not count as "external".
32 * @file nat/gnunet-service-nat_externalip.h
33 * @brief Functions for monitoring external IPv4 addresses
34 * @author Christian Grothoff
36 #ifndef GNUNET_SERVICE_NAT_EXTERNALIP_H
37 #define GNUNET_SERVICE_NAT_EXTERNALIP_H
43 * We have changed our opinion about being NATed in the first
44 * place. Adapt our probing.
46 * @param have_nat #GNUNET_YES if we believe we are behind NAT
49 GN_nat_status_changed (int have_nat);
53 * Function we call when we believe our external IPv4 address changed.
56 * @param ip address to add/remove
57 * @param add_remove #GNUNET_YES to add, #GNUNET_NO to remove
60 (*GN_NotifyExternalIPv4Change)(void *cls,
61 const struct in_addr *ip,
66 * Handle to monitor for external IP changes.
68 struct GN_ExternalIPMonitor;
72 * Start monitoring external IPv4 addresses.
74 * @param cb function to call on changes
75 * @param cb_cls closure for @a cb
76 * @return handle to cancel
78 struct GN_ExternalIPMonitor *
79 GN_external_ipv4_monitor_start (GN_NotifyExternalIPv4Change cb,
84 * Stop calling monitor.
86 * @param mon monitor to call
89 GN_external_ipv4_monitor_stop (struct GN_ExternalIPMonitor *mon);