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/*
This file is part of GNUnet.
Copyright (C) 2020 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
*/
/**
* @author Tobias Frisch
* @file src/messenger/gnunet-service-messenger_message_recv.c
* @brief GNUnet MESSENGER service
*/
#include "gnunet-service-messenger_message_recv.h"
#include "gnunet-service-messenger_message_handle.h"
void
recv_message_info (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel,
struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
{
int conflict = GNUNET_CONTAINER_multishortmap_contains (room->members, &(message->body.info.unique_id));
if (GNUNET_NO == conflict)
{
struct GNUNET_MESSENGER_Message *sync_message = create_message_id (&(message->body.info.unique_id));
struct GNUNET_HashCode sync_hash;
send_room_message_ext (room, room->host, sync_message, &sync_hash, tunnel);
destroy_message (sync_message);
switch_room_member_id (room, get_room_host_id (room), &(message->body.info.unique_id), NULL);
change_room_host_id (room, &(message->body.info.unique_id));
}
if (!tunnel->contact_id)
tunnel->contact_id = GNUNET_new(struct GNUNET_ShortHashCode);
GNUNET_memcpy(tunnel->contact_id, &(message->header.sender_id), sizeof(struct GNUNET_ShortHashCode));
struct GNUNET_ShortHashCode original_id;
if (GNUNET_YES == conflict)
{
GNUNET_memcpy(&original_id, get_room_host_id (room), sizeof(struct GNUNET_ShortHashCode));
change_room_host_id (room, &(message->body.info.unique_id));
}
{
struct GNUNET_MESSENGER_Message *join_message = create_message_join (room->host->ego);
struct GNUNET_HashCode join_hash;
send_tunnel_message (tunnel, room->host, join_message, &join_hash);
destroy_message (join_message);
}
if ((GNUNET_YES == conflict) && (0 != GNUNET_memcmp(&original_id, get_room_host_id (room))))
{
struct GNUNET_MESSENGER_Message *sync_message = create_message_id (&original_id);
struct GNUNET_HashCode sync_hash;
send_tunnel_message (tunnel, room->host, sync_message, &sync_hash);
destroy_message (sync_message);
}
}
struct GNUNET_MESSENGER_MemberInfoSpread
{
struct GNUNET_MESSENGER_SrvRoom *room;
struct GNUNET_MESSENGER_SrvTunnel *tunnel;
};
static int
iterate_send_member_infos (void *cls, const struct GNUNET_ShortHashCode *key, void *value)
{
struct GNUNET_MESSENGER_MemberInfo *info = value;
struct GNUNET_MESSENGER_MemberInfoSpread *spread = cls;
struct GNUNET_MESSENGER_ListMessage *element = info->session_messages.head;
while (element)
{
const struct GNUNET_MESSENGER_Message *message = get_room_message (spread->room, spread->room->host,
&(element->hash), GNUNET_NO);
if (message)
forward_tunnel_message (spread->tunnel, message, &(element->hash));
element = element->next;
}
return GNUNET_YES;
}
void
recv_message_join (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel,
struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
{
const struct GNUNET_MESSENGER_Message *info_msg = get_room_message (room, room->host, &(message->header.previous),
GNUNET_NO);
if ((info_msg) && (0 == GNUNET_memcmp(&(info_msg->header.sender_id), get_room_host_id (room)))
&& (GNUNET_MESSENGER_KIND_INFO == info_msg->header.kind))
{
struct GNUNET_MESSENGER_MemberInfoSpread spread;
spread.room = room;
if ((tunnel) && (tunnel->contact_id) && (0 == GNUNET_memcmp(tunnel->contact_id, &(message->header.sender_id))))
spread.tunnel = tunnel;
else
spread.tunnel = find_room_tunnel_to (room, &(message->header.sender_id));
if (spread.tunnel)
GNUNET_CONTAINER_multishortmap_iterate (room->member_infos, iterate_send_member_infos, &spread);
}
handle_message_join (room, tunnel, message, hash);
}
void
recv_message_leave (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel,
struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
{
handle_message_leave (room, tunnel, message, hash);
}
void
recv_message_name (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel,
struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
{
handle_message_name (room, tunnel, message, hash);
}
void
recv_message_key (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel,
struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
{
handle_message_key (room, tunnel, message, hash);
}
void
recv_message_peer (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel,
struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
{
struct GNUNET_PeerIdentity peer;
GNUNET_PEER_resolve (tunnel->peer, &peer);
if (0 == GNUNET_memcmp(&peer, &(message->body.peer.peer)))
{
if (!tunnel->peer_message)
tunnel->peer_message = GNUNET_new(struct GNUNET_HashCode);
GNUNET_memcpy(tunnel->peer_message, hash, sizeof(struct GNUNET_HashCode));
if (!tunnel->contact_id)
tunnel->contact_id = GNUNET_new(struct GNUNET_ShortHashCode);
GNUNET_memcpy(tunnel->contact_id, &(message->header.sender_id), sizeof(struct GNUNET_ShortHashCode));
}
handle_message_peer (room, tunnel, message, hash);
}
void
recv_message_id (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel,
struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
{
if ((tunnel->contact_id) && (0 == GNUNET_memcmp(tunnel->contact_id, &(message->header.sender_id))))
GNUNET_memcpy(tunnel->contact_id, &(message->body.id.id), sizeof(struct GNUNET_ShortHashCode));
handle_message_id (room, tunnel, message, hash);
}
void
recv_message_miss (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel,
struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
{
handle_message_miss (room, tunnel, message, hash);
}
void
recv_message_request (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel,
struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
{
const struct GNUNET_MESSENGER_Message *msg = get_room_message (room, room->host, &(message->body.request.hash),
GNUNET_NO);
if (msg)
forward_tunnel_message (tunnel, msg, &(message->body.request.hash));
}
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