/*
This file is part of GNUnet.
- (C) 2007-2014 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2007-2014 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
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., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
*/
/**
struct GNUNET_NAT_Handle;
+
+/**
+ * What the situation of the NAT connectivity
+ */
+enum GNUNET_NAT_Type
+{
+ /**
+ * We have a direct connection
+ */
+ GNUNET_NAT_TYPE_NO_NAT = GNUNET_OK,
+ /**
+ * We are under a NAT but cannot traverse it
+ */
+ GNUNET_NAT_TYPE_UNREACHABLE_NAT,
+ /**
+ * We can traverse using STUN
+ */
+ GNUNET_NAT_TYPE_STUN_PUNCHED_NAT,
+ /**
+ * WE can traverse using UPNP
+ */
+ GNUNET_NAT_TYPE_UPNP_NAT
+
+};
+
/**
* Error Types for the NAT subsystem (which can then later be converted/resolved to a string)
*/
*/
GNUNET_NAT_ERROR_HELPER_NAT_CLIENT_NOT_FOUND,
+
+
/**
*
*/
const socklen_t *addrlens,
GNUNET_NAT_AddressCallback address_callback,
GNUNET_NAT_ReversalCallback reversal_callback,
- void *callback_cls);
+ void *callback_cls,
+ struct GNUNET_NETWORK_Handle* sock);
/**
*
* @param cls closure
* @param addr the address, NULL on errors
- * @param result GNUNET_NAT_ERROR_SUCCESS on success, otherwise the specific error code
+ * @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,
* 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
+ * @param result #GNUNET_NAT_ERROR_SUCCESS on success, otherwise the specific error code
*/
typedef void
(*GNUNET_NAT_MiniAddressCallback) (void *cls,
* @param cls closure
* @param diff minimal suggested changes to the original configuration
* to make it work (as best as we can)
- * @param result GNUNET_NAT_ERROR_SUCCESS on success, otherwise the specific error code
+ * @param result #GNUNET_NAT_ERROR_SUCCESS on success, otherwise the specific error code
+ * @param type what the situation of the NAT
*/
typedef void
(*GNUNET_NAT_AutoResultCallback)(void *cls,
const struct GNUNET_CONFIGURATION_Handle *diff,
- enum GNUNET_NAT_StatusCode result);
+ enum GNUNET_NAT_StatusCode result,
+ enum GNUNET_NAT_Type type);
/**
void
GNUNET_NAT_autoconfig_cancel (struct GNUNET_NAT_AutoHandle *ah);
+/**
+ * Handle for active STUN Requests.
+ */
+struct GNUNET_NAT_STUN_Handle;
+
+
+
+
+/**
+ * Function called with the result if an error happened during STUN request.
+ *
+ * @param cls closure
+ * @param result the specific error code
+ */
+typedef void
+(*GNUNET_NAT_STUN_ErrorCallback)(void *cls,
+ enum GNUNET_NAT_StatusCode error);
+
+
+/**
+ * Make Generic STUN request and
+ * Send a generic stun request to the server specified using the specified socket.
+ * possibly waiting for a reply and filling the 'reply' field with
+ * the externally visible address.
+ *
+
+ * @param server, the address of the stun server
+ * @param port, port of the stun server
+ * @param sock the socket used to send the request
+ * @param cb callback in case of error
+ * @return #GNUNET_OK success, #GNUNET_NO on error.
+ */
+int
+GNUNET_NAT_stun_make_request(char * server,
+ int port,
+ struct GNUNET_NETWORK_Handle * sock, GNUNET_NAT_STUN_ErrorCallback cb,
+ void *cb_cls);
+
+
+/**
+ *
+ * Handle an incoming STUN message, Do some basic sanity checks on packet size and content,
+ * try to extract a bit of information, and possibly reply.
+ * At the moment this only processes BIND requests, and returns
+ * the externally visible address of the request.
+ * If a callback is specified, invoke it with the attribute.
+ *
+ * @param data, the packet
+ * @param len, the length of the packet
+ * @param arg, sockaddr_in where we will set our discovered packet
+ *
+ * @return, #GNUNET_OK on OK, #GNUNET_NO if the packet is invalid ( not a stun packet)
+ */
+int
+GNUNET_NAT_stun_handle_packet(const void *data,
+ size_t len,
+ struct sockaddr_in *arg);
+
+/**
+ * CHECK if is a valid STUN packet sending to GNUNET_NAT_stun_handle_packet.
+ * It also check if it can handle the packet based on the NAT handler.
+ * You don't need to call anything else to check if the packet is valid,
+ *
+ * @param cls the NAT handle
+ * @param data, packet
+ * @param len, packet length
+ *
+ * @return #GNUNET_NO if it can't decode,# GNUNET_YES if is a packet
+ */
+int
+GNUNET_NAT_is_valid_stun_packet(void *cls,
+ const void *data,
+ size_t len);
+
+
+
#endif
/* end of gnunet_nat_lib.h */
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