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- /*
- This file is part of GNUnet.
- Copyright (C) 2009, 2010, 2011, 2016 GNUnet e.V.
- GNUnet is free software: you can redistribute it and/or modify it
- under the terms of the GNU Affero General Public License as published
- by the Free Software Foundation, either version 3 of the License,
- or (at your option) any later version.
- GNUnet is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Affero General Public License for more details.
- You should have received a copy of the GNU Affero General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- SPDX-License-Identifier: AGPL3.0-or-later
- */
- /**
- * @file nat/gnunet-service-nat_helper.h
- * @brief runs the gnunet-helper-nat-server
- * @author Milan Bouchet-Valat
- * @author Christian Grothoff
- */
- #include "platform.h"
- #include "gnunet_util_lib.h"
- /**
- * Information we keep per NAT helper process.
- */
- struct HelperContext;
- /**
- * Function called whenever we get a connection reversal
- * request from another peer.
- *
- * @param cls closure
- * @param ra IP address of the peer who wants us to connect to it
- */
- typedef void
- (*GN_ReversalCallback) (void *cls,
- const struct sockaddr_in *ra);
- /**
- * Start the gnunet-helper-nat-server and process incoming
- * requests.
- *
- * @param internal_address
- * @param cb function to call if we receive a request
- * @param cb_cls closure for @a cb
- * @param cfg handle to the GNUnet configuration
- * @return NULL on error
- */
- struct HelperContext *
- GN_start_gnunet_nat_server_ (const struct in_addr *internal_address,
- GN_ReversalCallback cb,
- void *cb_cls,
- const struct GNUNET_CONFIGURATION_Handle *cfg);
- /**
- * Start the gnunet-helper-nat-server and process incoming
- * requests.
- *
- * @param h helper context to stop
- */
- void
- GN_stop_gnunet_nat_server_ (struct HelperContext *h);
- /**
- * We want to connect to a peer that is behind NAT. Run the
- * gnunet-helper-nat-client to send dummy ICMP responses to cause
- * that peer to connect to us (connection reversal).
- *
- * @param internal_address out internal address to use
- * @param internal_port internal port to use
- * @param remote_v4 the address of the peer (IPv4-only)
- * @param cfg handle to the GNUnet configuration
- * @return #GNUNET_SYSERR on error,
- * #GNUNET_OK otherwise
- */
- int
- GN_request_connection_reversal (const struct in_addr *internal_address,
- uint16_t internal_port,
- const struct in_addr *remote_v4,
- const struct GNUNET_CONFIGURATION_Handle *cfg);
- /* end of gnunet-service-nat_helper.h */
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