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3 Copyright (C) 2009, 2015, 2016, 2017 GNUnet e.V.
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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,
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
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19 * Code to figure out what our external IPv4 address(es) might
20 * be (external IPv4s are what is seen on the rest of the Internet).
22 * This can be implemented using different methods, and we allow
23 * the main service to be notified about changes to what we believe
24 * is our external IPv4 address.
26 * Note that this is explicitly only about NATed systems; if one
27 * of our network interfaces has a global IP address this does
28 * not count as "external".
30 * @file nat/gnunet-service-nat_externalip.h
31 * @brief Functions for monitoring external IPv4 addresses
32 * @author Christian Grothoff
34 #ifndef GNUNET_SERVICE_NAT_EXTERNALIP_H
35 #define GNUNET_SERVICE_NAT_EXTERNALIP_H
41 * We have changed our opinion about being NATed in the first
42 * place. Adapt our probing.
44 * @param have_nat #GNUNET_YES if we believe we are behind NAT
47 GN_nat_status_changed (int have_nat);
51 * Function we call when we believe our external IPv4 address changed.
54 * @param ip address to add/remove
55 * @param add_remove #GNUNET_YES to add, #GNUNET_NO to remove
58 (*GN_NotifyExternalIPv4Change)(void *cls,
59 const struct in_addr *ip,
64 * Handle to monitor for external IP changes.
66 struct GN_ExternalIPMonitor;
70 * Start monitoring external IPv4 addresses.
72 * @param cb function to call on changes
73 * @param cb_cls closure for @a cb
74 * @return handle to cancel
76 struct GN_ExternalIPMonitor *
77 GN_external_ipv4_monitor_start (GN_NotifyExternalIPv4Change cb,
82 * Stop calling monitor.
84 * @param mon monitor to call
87 GN_external_ipv4_monitor_stop (struct GN_ExternalIPMonitor *mon);