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/*
This file is part of GNUnet.
Copyright (C) 2011-2014, 2016 GNUnet e.V.
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3, 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
/**
* @file nat/gnunet-service-nat_mini.c
* @brief functions for interaction with miniupnp; tested with miniupnpc 1.5
* @author Christian Grothoff
*/
#ifndef GNUNET_SERVICE_NAT_MINI_H
#define GNUNET_SERVICE_NAT_MINI_H
/**
* Signature of a callback that is given an IP address.
*
* @param cls closure
* @param addr the address, NULL on errors
* @param result #GNUNET_NAT_ERROR_SUCCESS on success, otherwise the specific error code
*/
typedef void
(*GNUNET_NAT_IPCallback) (void *cls,
const struct in_addr *addr,
enum GNUNET_NAT_StatusCode result);
/**
* Opaque handle to cancel #GNUNET_NAT_mini_get_external_ipv4() operation.
*/
struct GNUNET_NAT_ExternalHandle;
/**
* Try to get the external IPv4 address of this peer.
*
* @param cb function to call with result
* @param cb_cls closure for @a cb
* @return handle for cancellation (can only be used until @a cb is called), NULL on error
*/
struct GNUNET_NAT_ExternalHandle *
GNUNET_NAT_mini_get_external_ipv4_ (GNUNET_NAT_IPCallback cb,
void *cb_cls);
/**
* Cancel operation.
*
* @param eh operation to cancel
*/
void
GNUNET_NAT_mini_get_external_ipv4_cancel_ (struct GNUNET_NAT_ExternalHandle *eh);
/**
* Handle to a mapping created with upnpc.
*/
struct GNUNET_NAT_MiniHandle;
/**
* Signature of the callback passed to #GNUNET_NAT_register() for
* a function to call whenever our set of 'valid' addresses changes.
*
* @param cls closure
* @param add_remove #GNUNET_YES to mean the new public IP address, #GNUNET_NO to mean
* the previous (now invalid) one, #GNUNET_SYSERR indicates an error
* @param addr either the previous or the new public IP address
* @param addrlen actual length of the @a addr
* @param result #GNUNET_NAT_ERROR_SUCCESS on success, otherwise the specific error code
*/
typedef void
(*GNUNET_NAT_MiniAddressCallback) (void *cls,
int add_remove,
const struct sockaddr *addr,
socklen_t addrlen,
enum GNUNET_NAT_StatusCode result);
/**
* Start mapping the given port using (mini)upnpc. This function
* should typically not be used directly (it is used within the
* general-purpose #GNUNET_NAT_register() code). However, it can be
* used if specifically UPnP-based NAT traversal is to be used or
* tested.
*
* @param port port to map
* @param is_tcp #GNUNET_YES to map TCP, #GNUNET_NO for UDP
* @param ac function to call with mapping result
* @param ac_cls closure for @a ac
* @return NULL on error
*/
struct GNUNET_NAT_MiniHandle *
GNUNET_NAT_mini_map_start (uint16_t port,
int is_tcp,
GNUNET_NAT_MiniAddressCallback ac,
void *ac_cls);
/**
* Remove a mapping created with (mini)upnpc. Calling
* this function will give 'upnpc' 1s to remove the mapping,
* so while this function is non-blocking, a task will be
* left with the scheduler for up to 1s past this call.
*
* @param mini the handle
*/
void
GNUNET_NAT_mini_map_stop (struct GNUNET_NAT_MiniHandle *mini);
#endif
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