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/*
This file is part of GNUnet.
(C) 2010 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
by the Free Software Foundation; either version 2, 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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/**
* @file transport/gnunet-service-transport_blacklist.c
* @brief low-level P2P messaging
* @author Christian Grothoff
*/
#include "platform.h"
#include "gnunet_protocols.h"
#include "gnunet_util_lib.h"
#include "gnunet_service_lib.h"
#include "transport.h"
#include "gnunet-service-transport_blacklist.h"
/**
* Handle a request to start a blacklist.
*
* @param cls closure (always NULL)
* @param client identification of the client
* @param message the actual message
*/
void
GNUNET_TRANSPORT_handle_blacklist_init (void *cls,
struct GNUNET_SERVER_Client *client,
const struct GNUNET_MessageHeader *message)
{
struct Blacklisters *bl;
bl = GNUNET_malloc (sizeof (struct Blacklisters));
bl->client = client;
GNUNET_SERVER_client_keep (client);
GNUNET_CONTAINER_DLL_insert (bl_head, bl_tail, bl);
/* FIXME: confirm that all existing connections are OK! */
}
/**
* Handle a request to blacklist a peer.
*
* @param cls closure (always NULL)
* @param client identification of the client
* @param message the actual message
*/
void
GNUNET_TRANSPORT_handle_blacklist_reply (void *cls,
struct GNUNET_SERVER_Client *client,
const struct GNUNET_MessageHeader *message)
{
struct Blacklisters *bl;
const struct BlacklistMessage *msg = (const struct BlacklistMessage*) message;
bl = bl_head;
while ( (bl != NULL) &&
(bl->client != client) )
bl = bl->next;
if (bl == NULL)
{
GNUNET_SERVER_client_done (client, GNUNET_SYSERR);
return;
}
if (ntohl (msg->is_allowed) == GNUNET_SYSERR)
{
be = GNUNET_malloc (sizeof (struct BlacklistEntry));
be->peer = msg->peer;
be->client = client;
GNUNET_CONTAINER_multihashmap_put (blacklist,
&msg->peer.hashPubKey,
be,
GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
}
/* FIXME: trigger continuation... */
}
/**
* Notify the given client about all entries in the blacklist.
*
* @param cls closure, refers to the 'struct GNUNET_SERVER_Client' to notify
* @param key current key code (peer identity, not used)
* @param value value in the hash map, the 'struct BlacklistEntry*'
* @return GNUNET_YES (continue to iterate)
*/
static int
notify_blacklist_entry (void *cls,
const GNUNET_HashCode *key,
void *value)
{
struct GNUNET_SERVER_Client *client = cls;
struct BlacklistEntry *be = value;
struct BlacklistMessage msg;
msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST);
msg.header.size = htons (sizeof (struct BlacklistMessage));
msg.reserved = htonl (0);
msg.peer = be->peer;
msg.until = GNUNET_TIME_absolute_hton (be->until);
GNUNET_SERVER_notification_context_unicast (blacklist_notifiers,
client,
&msg.header,
GNUNET_NO);
return GNUNET_YES;
}
/**
* Handle a request for notification of blacklist changes.
*
* @param cls closure (always NULL)
* @param client identification of the client
* @param message the actual message
*/
void
GNUNET_TRANSPORT_handle_blacklist_notify (void *cls,
struct GNUNET_SERVER_Client *client,
const struct GNUNET_MessageHeader *message)
{
GNUNET_SERVER_notification_context_add (blacklist_notifiers, client);
GNUNET_CONTAINER_multihashmap_iterate (blacklist,
¬ify_blacklist_entry,
client);
}
/**
* Is the given peer currently blacklisted?
*
* @param id identity of the peer
* @return GNUNET_YES if the peer is blacklisted, GNUNET_NO if not
*/
int
GNUNET_TRANSPORT_blacklist_check (const struct GNUNET_PeerIdentity *id)
{
if (GNUNET_CONTAINER_multihashmap_contains (blacklist, &id->hashPubKey))
return GNUNET_YES;
}
/**
* Initialize the blacklisting subsystem.
*
* @param server server of the transport service
* @param s scheduler to use
*/
void
GNUNET_TRANSPORT_blacklist_init (struct GNUNET_SERVER_Handle *server,
struct GNUNET_SCHEDULER_Handle *s)
{
sched = s;
blacklist = GNUNET_CONTAINER_multihashmap_create (4);
GNUNET_SCHEDULER_add_delayed (sched,
GNUNET_TIME_UNIT_FOREVER_REL,
&shutdown_task,
NULL);
}
/* end of gnunet-service-transport_blacklist.c */
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