2 This file is part of GNUnet.
3 Copyright (C) 2009, 2010, 2011, 2016 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
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13 Affero General Public License for more details.
17 * @file nat/gnunet-service-nat_helper.h
18 * @brief runs the gnunet-helper-nat-server
19 * @author Milan Bouchet-Valat
20 * @author Christian Grothoff
23 #include "gnunet_util_lib.h"
27 * Information we keep per NAT helper process.
33 * Function called whenever we get a connection reversal
34 * request from another peer.
37 * @param ra IP address of the peer who wants us to connect to it
40 (*GN_ReversalCallback) (void *cls,
41 const struct sockaddr_in *ra);
45 * Start the gnunet-helper-nat-server and process incoming
48 * @param internal_address
49 * @param cb function to call if we receive a request
50 * @param cb_cls closure for @a cb
51 * @return NULL on error
53 struct HelperContext *
54 GN_start_gnunet_nat_server_ (const struct in_addr *internal_address,
55 GN_ReversalCallback cb,
60 * Start the gnunet-helper-nat-server and process incoming
63 * @param h helper context to stop
66 GN_stop_gnunet_nat_server_ (struct HelperContext *h);
70 * We want to connect to a peer that is behind NAT. Run the
71 * gnunet-helper-nat-client to send dummy ICMP responses to cause
72 * that peer to connect to us (connection reversal).
74 * @param internal_address out internal address to use
75 * @param internal_port internal port to use
76 * @param remote_v4 the address of the peer (IPv4-only)
77 * @return #GNUNET_SYSERR on error,
78 * #GNUNET_OK otherwise
81 GN_request_connection_reversal (const struct in_addr *internal_address,
82 uint16_t internal_port,
83 const struct in_addr *sa);
86 /* end of gnunet-service-nat_helper.h */