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/*
This file is part of GNUnet.
Copyright (C) 2012, 2013 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/>.
*/
/**
* @file multicast/multicast.h
* @brief multicast IPC messages
* @author Christian Grothoff
* @author Gabor X Toth
*/
#ifndef MULTICAST_H
#define MULTICAST_H
#include "platform.h"
#include "gnunet_multicast_service.h"
GNUNET_NETWORK_STRUCT_BEGIN
/**
* Header of a join request sent to the origin or another member.
*/
struct MulticastJoinRequestMessage
{
/**
* Type: GNUNET_MESSAGE_TYPE_MULTICAST_JOIN_REQUEST
*/
struct GNUNET_MessageHeader header;
/**
* Always zero.
*/
uint32_t reserved;
/**
* ECC signature of the rest of the fields of the join request.
*
* Signature must match the public key of the joining member.
*/
struct GNUNET_CRYPTO_EcdsaSignature signature;
/**
* Purpose for the signature and size of the signed data.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* Public key of the target group.
*/
struct GNUNET_CRYPTO_EddsaPublicKey group_pub_key;
/**
* Public key of the joining member.
*/
struct GNUNET_CRYPTO_EcdsaPublicKey member_pub_key;
/**
* Peer identity of the joining member.
*/
struct GNUNET_PeerIdentity peer;
/* Followed by struct GNUNET_MessageHeader join_message */
};
/**
* Header of a join decision message sent to a peer requesting join.
*/
struct MulticastJoinDecisionMessage
{
/**
* Type: GNUNET_MESSAGE_TYPE_MULTICAST_JOIN_DECISION
*/
struct GNUNET_MessageHeader header;
/**
* #GNUNET_YES if the peer was admitted
* #GNUNET_NO if entry was refused,
* #GNUNET_SYSERR if the request could not be answered.
*/
int32_t is_admitted;
/**
* Number of relays given.
*/
uint32_t relay_count;
/* Followed by relay_count peer identities */
/* Followed by the join response message */
};
/**
* Header added to a struct MulticastJoinDecisionMessage
* when sent between the client and service.
*/
struct MulticastJoinDecisionMessageHeader
{
/**
* Type: GNUNET_MESSAGE_TYPE_MULTICAST_JOIN_DECISION
*/
struct GNUNET_MessageHeader header;
/**
* C->S: Peer to send the join decision to.
* S->C: Peer we received the join decision from.
*/
struct GNUNET_PeerIdentity peer;
/**
* C->S: Public key of the member requesting join.
* S->C: Unused.
*/
struct GNUNET_CRYPTO_EcdsaPublicKey member_pub_key;
/* Followed by struct MulticastJoinDecisionMessage */
};
/**
* Message sent from the client to the service to notify the service
* about the result of a membership test.
*/
struct MulticastMembershipTestResultMessage
{
/**
* Type: GNUNET_MESSAGE_TYPE_MULTICAST_MEMBERSHIP_TEST_RESULT
*/
struct GNUNET_MessageHeader header;
/**
* Unique ID that identifies the associated membership test.
*/
uint32_t uid;
/**
* #GNUNET_YES if the peer is a member
* #GNUNET_NO if peer is not a member,
* #GNUNET_SYSERR if the test could not be answered.
*/
int32_t is_admitted;
};
/**
* Message sent from the client to the service OR the service to the
* client asking for a message fragment to be replayed.
*/
struct MulticastReplayRequestMessage
{
/**
* The message type should be
* #GNUNET_MESSAGE_TYPE_MULTICAST_REPLAY_REQUEST.
*/
struct GNUNET_MessageHeader header;
/**
* S->C: Public key of the member requesting replay.
* C->S: Unused.
*/
struct GNUNET_CRYPTO_EcdsaPublicKey member_pub_key;
/**
* ID of the message that is being requested.
*/
uint64_t fragment_id;
/**
* ID of the message that is being requested.
*/
uint64_t message_id;
/**
* Offset of the fragment that is being requested.
*/
uint64_t fragment_offset;
/**
* Additional flags for the request.
*/
uint64_t flags;
/**
* Replay request ID.
*/
uint32_t uid;
};
/**
* Message sent from the client to the service to give the service
* a replayed message.
*/
struct MulticastReplayResponseMessage
{
/**
* Type: GNUNET_MESSAGE_TYPE_MULTICAST_REPLAY_RESPONSE
* or GNUNET_MESSAGE_TYPE_MULTICAST_REPLAY_RESPONSE_END
*/
struct GNUNET_MessageHeader header;
/**
* ID of the message that is being requested.
*/
uint64_t fragment_id;
/**
* ID of the message that is being requested.
*/
uint64_t message_id;
/**
* Offset of the fragment that is being requested.
*/
uint64_t fragment_offset;
/**
* Additional flags for the request.
*/
uint64_t flags;
/**
* An `enum GNUNET_MULTICAST_ReplayErrorCode` identifying issues (in NBO).
*/
int32_t error_code;
/* followed by replayed message */
};
/**
* Message sent from the client to the service to notify the service
* about the starting of a multicast group with this peers as its origin.
*/
struct MulticastOriginStartMessage
{
/**
* Type: GNUNET_MESSAGE_TYPE_MULTICAST_ORIGIN_START
*/
struct GNUNET_MessageHeader header;
/**
* Always zero.
*/
uint32_t reserved;
/**
* Private, non-ephemeral key for the multicast group.
*/
struct GNUNET_CRYPTO_EddsaPrivateKey group_key;
/**
* Last fragment ID sent to the group, used to continue counting fragments if
* we resume operating * a group.
*/
uint64_t max_fragment_id;
};
struct MulticastMemberJoinMessage
{
/**
* Type: GNUNET_MESSAGE_TYPE_MULTICAST_MEMBER_JOIN
*/
struct GNUNET_MessageHeader header;
uint32_t relay_count GNUNET_PACKED;
struct GNUNET_CRYPTO_EddsaPublicKey group_pub_key;
struct GNUNET_CRYPTO_EcdsaPrivateKey member_key;
struct GNUNET_PeerIdentity origin;
/* Followed by struct GNUNET_PeerIdentity relays[relay_count] */
/* Followed by struct GNUNET_MessageHeader join_msg */
};
GNUNET_NETWORK_STRUCT_END
#endif
/* end of multicast.h */
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