/*
This file is part of GNUnet.
- (C) 2012, 2013 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2012, 2013 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.
*/
/**
#include "gnunet_util_lib.h"
#include "gnunet_env_lib.h"
#include "gnunet_multicast_service.h"
-
+//Mingw work around
+#ifdef MINGW
+ # ifndef UINT64_MAX
+ # define UINT64_MAX 0xffffffffffffffffULL
+ # endif
+#endif
/**
* Version number of GNUnet-PSYC API.
GNUNET_PSYC_CHANNEL_RESTRICTED_HISTORY = 1 << 1
};
+
/**
* PSYC channel policies.
*/
enum GNUNET_PSYC_MessageFlags
{
+ /**
+ * Default / no flags.
+ */
+ GNUNET_PSYC_MESSAGE_DEFAULT = 0,
+
/**
* Historic message, retrieved from PSYCstore.
*/
/**
* Request from slave to master.
*/
- GNUNET_PSYC_MESSAGE_REQUEST = 1 << 1
+ GNUNET_PSYC_MESSAGE_REQUEST = 1 << 1,
+
+ /**
+ * Message can be delivered out of order.
+ */
+ GNUNET_PSYC_MESSAGE_ORDER_ANY = 1 << 2
+};
+
+
+/**
+ * Values for the @a state_delta field of GNUNET_PSYC_MessageHeader.
+ */
+enum GNUNET_PSYC_StateDeltaValues
+{
+ GNUNET_PSYC_STATE_RESET = 0,
+
+ GNUNET_PSYC_STATE_NOT_MODIFIED = UINT64_MAX
};
+
GNUNET_NETWORK_STRUCT_BEGIN
+/**
+ * A PSYC message.
+ *
+ * Used for single-fragment messages e.g. in a join request or response.
+ */
+struct GNUNET_PSYC_Message
+{
+ /**
+ * Message header with size and type information.
+ */
+ struct GNUNET_MessageHeader header;
+
+ /* Followed by concatenated PSYC message parts:
+ * messages with GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_* types
+ */
+};
+
+
/**
* Header of a PSYC message.
+ *
+ * The PSYC service adds this when delivering the message to local clients,
+ * not present on the multicast layer.
*/
struct GNUNET_PSYC_MessageHeader
{
/**
* Number of the message this message part belongs to.
+ * Monotonically increasing from 1.
*/
uint64_t message_id GNUNET_PACKED;
+ /**
+ * Byte offset of this @e fragment of the @e message.
+ * FIXME: use data_offset instead
+ */
+ uint64_t fragment_offset GNUNET_PACKED;
+
/**
* Sending slave's public key.
* Not set if the message is from the master.
*/
- struct GNUNET_CRYPTO_EddsaPublicKey slave_key;
+ struct GNUNET_CRYPTO_EcdsaPublicKey slave_key;
/* Followed by concatenated PSYC message parts:
* messages with GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_* types
*/
uint32_t flags GNUNET_PACKED;
+ /**
+ * Number of message IDs since the last message that contained state
+ * operations. @see enum GNUNET_PSYC_StateDeltaValues
+ */
+ uint64_t state_delta GNUNET_PACKED;
+
/* Followed by NUL-terminated method name. */
};
/* Followed by NUL-terminated name, then the value. */
};
+
+struct GNUNET_PSYC_CountersResultMessage
+{
+ /**
+ * Type: GNUNET_MESSAGE_TYPE_PSYC_RESULT_COUNTERS
+ */
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * Status code for the operation.
+ */
+ uint32_t result_code GNUNET_PACKED;
+
+ /**
+ * Last message ID sent to the channel.
+ */
+ uint64_t max_message_id GNUNET_PACKED;
+};
+
+
+/**
+ * Join request sent to a PSYC master.
+ */
+struct GNUNET_PSYC_JoinRequestMessage
+{
+ /**
+ * Type: GNUNET_MESSAGE_TYPE_PSYC_MASTER_JOIN_REQUEST
+ */
+ struct GNUNET_MessageHeader header;
+ /**
+ * Public key of the joining slave.
+ */
+ struct GNUNET_CRYPTO_EcdsaPublicKey slave_key;
+
+ /* Followed by struct GNUNET_MessageHeader join_request */
+};
+
+
+/**
+ * Join decision sent in reply to a join request.
+ */
+struct GNUNET_PSYC_JoinDecisionMessage
+{
+ /**
+ * Type: GNUNET_MESSAGE_TYPE_PSYC_JOIN_DECISION
+ */
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * #GNUNET_YES if the slave was admitted.
+ */
+ int32_t is_admitted;
+
+ /**
+ * Public key of the joining slave.
+ * Only set when the master is sending the decision,
+ * not set when a slave is receiving it.
+ */
+ struct GNUNET_CRYPTO_EcdsaPublicKey slave_key;
+
+ /* Followed by struct GNUNET_MessageHeader join_response */
+};
+
+
+enum GNUNET_PSYC_HistoryReplayFlags
+{
+ /**
+ * Replay locally available messages.
+ */
+ GNUNET_PSYC_HISTORY_REPLAY_LOCAL = 0,
+
+ /**
+ * Replay messages from remote peers if not found locally.
+ */
+ GNUNET_PSYC_HISTORY_REPLAY_REMOTE = 1,
+};
+
+
+struct GNUNET_PSYC_HistoryRequestMessage
+{
+ /**
+ * Type: GNUNET_MESSAGE_TYPE_PSYC_CHANNEL_HISTORY_REPLAY
+ */
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * @see enum GNUNET_PSYC_HistoryReplayFlags
+ */
+ uint32_t flags GNUNET_PACKED;
+
+ /**
+ * ID for this operation.
+ */
+ uint64_t op_id GNUNET_PACKED;
+
+ uint64_t start_message_id GNUNET_PACKED;
+
+ uint64_t end_message_id GNUNET_PACKED;
+
+ uint64_t message_limit GNUNET_PACKED;
+
+ /* Followed by NUL-terminated method name prefix. */
+};
+
+
+struct GNUNET_PSYC_StateRequestMessage
+{
+ /**
+ * Types:
+ * - GNUNET_MESSAGE_TYPE_PSYC_CHANNEL_STATE_GET
+ * - GNUNET_MESSAGE_TYPE_PSYC_CHANNEL_STATE_GET_PREFIX
+ */
+ struct GNUNET_MessageHeader header;
+
+ uint32_t reserved GNUNET_PACKED;
+
+ /**
+ * ID for this operation.
+ */
+ uint64_t op_id GNUNET_PACKED;
+
+ /* Followed by NUL-terminated name. */
+};
+
+
+/**** service -> library ****/
+
+
+/**
+ * Answer from service to client about last operation.
+ */
+struct GNUNET_PSYC_OperationResultMessage
+{
+ /**
+ * Types:
+ * - GNUNET_MESSAGE_TYPE_PSYC_RESULT_CODE
+ * - GNUNET_MESSAGE_TYPE_PSYC_CHANNEL_STATE_RESULT
+ */
+ struct GNUNET_MessageHeader header;
+
+ uint32_t reserved GNUNET_PACKED;
+
+ /**
+ * Operation ID.
+ */
+ uint64_t op_id GNUNET_PACKED;
+
+ /**
+ * Status code for the operation.
+ */
+ uint64_t result_code GNUNET_PACKED;
+
+ /* Followed by:
+ * - on error: NUL-terminated error message
+ * - on success: one of the following message types
+ *
+ * For a STATE_RESULT, one of:
+ * - GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_MODIFIER
+ * - GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_MOD_CONT
+ * - GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_END
+ */
+};
+
GNUNET_NETWORK_STRUCT_END
+
#define GNUNET_PSYC_MODIFIER_MAX_PAYLOAD \
GNUNET_MULTICAST_FRAGMENT_MAX_PAYLOAD \
- sizeof (struct GNUNET_PSYC_MessageModifier)
GNUNET_MULTICAST_FRAGMENT_MAX_PAYLOAD \
- sizeof (struct GNUNET_MessageHeader)
+
+/**
+ * PSYC message part processing states.
+ */
+enum GNUNET_PSYC_MessageState
+{
+ GNUNET_PSYC_MESSAGE_STATE_START = 0,
+ GNUNET_PSYC_MESSAGE_STATE_HEADER = 1,
+ GNUNET_PSYC_MESSAGE_STATE_METHOD = 2,
+ GNUNET_PSYC_MESSAGE_STATE_MODIFIER = 3,
+ GNUNET_PSYC_MESSAGE_STATE_MOD_CONT = 4,
+ GNUNET_PSYC_MESSAGE_STATE_DATA = 5,
+ GNUNET_PSYC_MESSAGE_STATE_END = 6,
+ GNUNET_PSYC_MESSAGE_STATE_CANCEL = 7,
+ GNUNET_PSYC_MESSAGE_STATE_ERROR = 8,
+};
+
+
/**
* Handle that identifies a join request.
*
/**
- * Method called from PSYC upon receiving part of a message.
+ * Method called from PSYC upon receiving a message.
*
- * @param cls Closure.
- * @param msg Message part, one of the following types:
- * - GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_HEADER
- * - GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_METHOD
- * - GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_MODIFIER
- * - GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_MOD_CONT
- * - GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_DATA
+ * @param cls Closure.
+ * @param message_id Sequence number of the message.
+ * @param flags OR'ed GNUNET_PSYC_MessageFlags
+ * @param msg Message part, one of the following types:
*/
typedef void
(*GNUNET_PSYC_MessageCallback) (void *cls,
uint64_t message_id,
uint32_t flags,
- const struct GNUNET_MessageHeader *msg);
+ const struct GNUNET_PSYC_MessageHeader *msg);
+
+
+/**
+ * Method called from PSYC upon receiving part of a message.
+ *
+ * @param cls
+ * Closure.
+ * @param slave_key
+ * Public key of the slave sending the message.
+ * Only set for channel master.
+ * @param message_id
+ * Sequence number of the message.
+ * @param flags
+ * OR'ed GNUNET_PSYC_MessageFlags
+ * @param data_offset
+ * Byte offset of data, only set if @a msg has a type
+ * #GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_DATA
+ * @param msg Message part, one of the following types:
+ * - #GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_HEADER
+ * - #GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_METHOD
+ * - #GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_MODIFIER
+ * - #GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_MOD_CONT
+ * - #GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_DATA
+ * or NULL if an error occurred while receiving a message.
+ */
+typedef void
+(*GNUNET_PSYC_MessagePartCallback) (void *cls,
+ const struct GNUNET_CRYPTO_EcdsaPublicKey *slave_key,
+ uint64_t message_id,
+ uint32_t flags,
+ uint64_t data_offset,
+ const struct GNUNET_MessageHeader *msg);
/**
* Method called from PSYC upon receiving a join request.
*
- * @param cls Closure.
- * @param slave requesting to join.
- * @param method_name Method name in the join request.
- * @param variable_count Number of elements in the @a variables array.
- * @param variables Transient variables for the join request.
- * @param data Data stream given to the method (might not be zero-terminated
- * if data is binary).
- * @param data_size Number of bytes in @a data.
- * @param jh Join handle to use with GNUNET_PSYC_join_decision()
+ * @param cls
+ * Closure.
+ * @param slave_key
+ * Public key of the slave requesting join.
+ * @param join_msg
+ * Join message sent along with the request.
+ * @param jh
+ * Join handle to use with GNUNET_PSYC_join_decision()
*/
typedef void
-(*GNUNET_PSYC_JoinCallback) (void *cls,
- const struct GNUNET_CRYPTO_EddsaPublicKey
- *slave_key,
- const char *method_name,
- size_t variable_count,
- const struct GNUNET_ENV_Modifier *variables,
- const void *data,
- size_t data_size,
- struct GNUNET_PSYC_JoinHandle *jh);
+(*GNUNET_PSYC_JoinRequestCallback) (void *cls,
+ const struct GNUNET_PSYC_JoinRequestMessage *req,
+ const struct GNUNET_CRYPTO_EcdsaPublicKey *slave_key,
+ const struct GNUNET_PSYC_Message *join_msg,
+ struct GNUNET_PSYC_JoinHandle *jh);
/**
* Must be called once and only once in response to an invocation of the
* #GNUNET_PSYC_JoinCallback.
*
- * @param jh Join request handle.
- * @param is_admitted #GNUNET_YES if joining is approved,
- * #GNUNET_NO if it is disapproved.
- * @param relay_count Number of relays given.
- * @param relays Array of suggested peers that might be useful relays to use
+ * @param jh Join request handle.
+ * @param is_admitted
+ * #GNUNET_YES if the join is approved,
+ * #GNUNET_NO if it is disapproved,
+ * #GNUNET_SYSERR if we cannot answer the request.
+ * @param relay_count Number of relays given.
+ * @param relays Array of suggested peers that might be useful relays to use
* when joining the multicast group (essentially a list of peers that
* are already part of the multicast group and might thus be willing
* to help with routing). If empty, only this local peer (which must
* be the multicast origin) is a good candidate for building the
* multicast tree. Note that it is unnecessary to specify our own
* peer identity in this array.
- * @param method_name Method name for the message transmitted with the response.
- * @param env Environment containing transient variables for the message,
- * or NULL.
- * @param data Data of the message.
- * @param data_size Size of @a data.
+ * @param join_resp Application-dependent join response message to send along
+ * with the decision.
+ *
+ * @return #GNUNET_OK on success,
+ * #GNUNET_SYSERR if @a join_resp is too large.
*/
-void
+int
GNUNET_PSYC_join_decision (struct GNUNET_PSYC_JoinHandle *jh,
int is_admitted,
uint32_t relay_count,
const struct GNUNET_PeerIdentity *relays,
- const char *method_name,
- const struct GNUNET_ENV_Environment *env,
- const void *data,
- size_t data_size);
+ const struct GNUNET_PSYC_Message *join_resp);
/**
/**
- * Function called after the channel master started.
+ * Function called after connected to the PSYC service
+ * and the channel master started.
*
- * @param cls Closure.
- * @param last_message_id Last message ID sent to the channel.
+ * Also called when reconnected to the service
+ * after the connection closed unexpectedly.
+ *
+ * @param cls
+ * Closure.
+ * @param result
+ * #GNUNET_YES if there were already messages sent to the channel,
+ * #GNUNET_NO if the message history is empty,
+ * #GNUNET_SYSERR on error.
+ * @param max_message_id
+ * Last message ID sent to the channel.
*/
typedef void
-(*GNUNET_PSYC_MasterStartCallback) (void *cls, uint64_t max_message_id);
+(*GNUNET_PSYC_MasterStartCallback) (void *cls, int result,
+ uint64_t max_message_id);
/**
* or part messages, the respective methods must call other PSYC functions to
* inform PSYC about the meaning of the respective events.
*
- * @param cfg Configuration to use (to connect to PSYC service).
- * @param channel_key ECC key that will be used to sign messages for this
+ * @param cfg Configuration to use (to connect to PSYC service).
+ * @param channel_key ECC key that will be used to sign messages for this
* PSYC session. The public key is used to identify the PSYC channel.
* Note that end-users will usually not use the private key directly, but
* rather look it up in GNS for places managed by other users, or select
* a file with the private key(s) when setting up their own channels
* FIXME: we'll likely want to use NOT the p521 curve here, but a cheaper
* one in the future.
- * @param policy Channel policy specifying join and history restrictions.
+ * @param policy Channel policy specifying join and history restrictions.
* Used to automate join decisions.
- * @param message_cb Function to invoke on message parts received from slaves.
- * @param join_cb Function to invoke when a peer wants to join.
- * @param master_started_cb Function to invoke after the channel master started.
- * @param cls Closure for @a method and @a join_cb.
+ * @param master_start_cb Function to invoke after the channel master started.
+ * @param join_request_cb Function to invoke when a slave wants to join.
+ * @param message_cb Function to invoke on message parts sent to the channel
+ * and received from slaves
+ * @param cls Closure for @a method and @a join_cb.
+ *
* @return Handle for the channel master, NULL on error.
*/
struct GNUNET_PSYC_Master *
GNUNET_PSYC_master_start (const struct GNUNET_CONFIGURATION_Handle *cfg,
const struct GNUNET_CRYPTO_EddsaPrivateKey *channel_key,
enum GNUNET_PSYC_Policy policy,
+ GNUNET_PSYC_MasterStartCallback master_start_cb,
+ GNUNET_PSYC_JoinRequestCallback join_request_cb,
GNUNET_PSYC_MessageCallback message_cb,
- GNUNET_PSYC_JoinCallback join_cb,
- GNUNET_PSYC_MasterStartCallback master_started_cb,
+ GNUNET_PSYC_MessagePartCallback message_part_cb,
void *cls);
* Only needed during the first call to this callback at the beginning
* of the modifier. In case of subsequent calls asking for value
* continuations @a oper is set to #NULL.
- * @param[out] value_size Where to write the full size of the value.
+ * @param[out] full_value_size Where to write the full size of the value.
* Only needed during the first call to this callback at the beginning
* of the modifier. In case of subsequent calls asking for value
* continuations @a value_size is set to #NULL.
uint16_t *data_size,
void *data,
uint8_t *oper,
- uint32_t *value_size);
+ uint32_t *full_value_size);
/**
* Flags for transmitting messages to a channel by the master.
enum GNUNET_PSYC_MasterTransmitFlags
{
GNUNET_PSYC_MASTER_TRANSMIT_NONE = 0,
+
/**
* Whether this message should reset the channel state,
* i.e. remove all previously stored state variables.
*/
- GNUNET_PSYC_MASTER_TRANSMIT_RESET_STATE = 1 << 0,
+
+ GNUNET_PSYC_MASTER_TRANSMIT_STATE_RESET = 1 << 0,
/**
- * Whether we need to increment the group generation counter after
- * transmitting this message.
+ * Whether this message contains any state modifiers.
*/
- GNUNET_PSYC_MASTER_TRANSMIT_INC_GROUP_GEN = 1 << 1,
+ GNUNET_PSYC_MASTER_TRANSMIT_STATE_MODIFY = 1 << 1,
/**
* Add PSYC header variable with the hash of the current channel state.
*/
- GNUNET_PSYC_MASTER_TRANSMIT_ADD_STATE_HASH = 1 << 2
+ GNUNET_PSYC_MASTER_TRANSMIT_STATE_HASH = 1 << 2,
+
+ /**
+ * Whether we need to increment the group generation counter after
+ * transmitting this message.
+ */
+ GNUNET_PSYC_MASTER_TRANSMIT_INC_GROUP_GEN = 1 << 3
};
/**
* Stop a PSYC master channel.
*
- * @param master PSYC channel master to stop.
+ * @param master
+ * PSYC channel master to stop.
+ * @param keep_active
+ * Keep place active after last application disconnected.
+ * @param stop_cb
+ * Function called after the master stopped
+ * and disconnected from the psyc service.
+ * @param stop_cls
+ * Closure for @a part_cb.
*/
void
-GNUNET_PSYC_master_stop (struct GNUNET_PSYC_Master *master);
+GNUNET_PSYC_master_stop (struct GNUNET_PSYC_Master *master,
+ int keep_active,
+ GNUNET_ContinuationCallback stop_cb,
+ void *stop_cls);
/**
/**
- * Function called after the slave joined.
+ * Function called after the slave connected to the PSYC service.
*
- * @param cls Closure.
- * @param max_message_id Last message ID sent to the channel.
+ * Also called when reconnected to the service
+ * after the connection closed unexpectedly.
+ *
+ * @param cls
+ * Closure.
+ * @param result
+ * #GNUNET_YES if there were already messages sent to the channel,
+ * #GNUNET_NO if the message history is empty,
+ * #GNUNET_SYSERR on error.
+ * @param max_message_id
+ * Last message ID sent to the channel.
+ */
+typedef void
+(*GNUNET_PSYC_SlaveConnectCallback) (void *cls, int result,
+ uint64_t max_message_id);
+
+
+/**
+ * Method called to inform about the decision in response to a join request.
+ *
+ * If @a is_admitted is not #GNUNET_YES, then sending messages to the channel is
+ * not possible, but earlier history can be still queried.
+ *
+ * @param cls Closure.
+ * @param is_admitted #GNUNET_YES or #GNUNET_NO or #GNUNET_SYSERR
+ * @param join_msg Application-dependent join message from the origin.
*/
typedef void
-(*GNUNET_PSYC_SlaveJoinCallback) (void *cls, uint64_t max_message_id);
+(*GNUNET_PSYC_JoinDecisionCallback) (void *cls,
+ const struct GNUNET_PSYC_JoinDecisionMessage *dcsn,
+ int is_admitted,
+ const struct GNUNET_PSYC_Message *join_msg);
/**
* notification on failure (as the channel may simply take days to approve,
* and disapproval is simply being ignored).
*
- * @param cfg Configuration to use.
- * @param channel_key ECC public key that identifies the channel we wish to join.
- * @param slave_key ECC private-public key pair that identifies the slave, and
+ * @param cfg Configuration to use.
+ * @param channel_key ECC public key that identifies the channel we wish to join.
+ * @param slave_key ECC private-public key pair that identifies the slave, and
* used by multicast to sign the join request and subsequent unicast
* requests sent to the master.
- * @param origin Peer identity of the origin.
- * @param relay_count Number of peers in the @a relays array.
- * @param relays Peer identities of members of the multicast group, which serve
+ * @param origin Peer identity of the origin.
+ * @param relay_count Number of peers in the @a relays array.
+ * @param relays Peer identities of members of the multicast group, which serve
* as relays and used to join the group at.
- * @param message_cb Function to invoke on message parts received from the
+ * @param message_cb Function to invoke on message parts received from the
* channel, typically at least contains method handlers for @e join and
* @e part.
- * @param join_cb function invoked once we have joined with the current
- * message ID of the channel
- * @param slave_joined_cb Function to invoke when a peer wants to join.
- * @param cls Closure for @a message_cb and @a slave_joined_cb.
- * @param method_name Method name for the join request.
- * @param env Environment containing transient variables for the request, or NULL.
- * @param data Payload for the join message.
- * @param data_size Number of bytes in @a data.
+ * @param slave_connect_cb Function invoked once we have connected to the
+ * PSYC service.
+ * @param join_decision_cb Function invoked once we have received a join
+ * decision.
+ * @param cls Closure for @a message_cb and @a slave_joined_cb.
+ * @param method_name Method name for the join request.
+ * @param env Environment containing transient variables for the request, or NULL.
+ * @param data Payload for the join message.
+ * @param data_size Number of bytes in @a data.
+ *
* @return Handle for the slave, NULL on error.
*/
struct GNUNET_PSYC_Slave *
GNUNET_PSYC_slave_join (const struct GNUNET_CONFIGURATION_Handle *cfg,
const struct GNUNET_CRYPTO_EddsaPublicKey *channel_key,
- const struct GNUNET_CRYPTO_EddsaPrivateKey *slave_key,
+ const struct GNUNET_CRYPTO_EcdsaPrivateKey *slave_key,
const struct GNUNET_PeerIdentity *origin,
uint32_t relay_count,
const struct GNUNET_PeerIdentity *relays,
GNUNET_PSYC_MessageCallback message_cb,
- GNUNET_PSYC_JoinCallback join_cb,
- GNUNET_PSYC_SlaveJoinCallback slave_joined_cb,
+ GNUNET_PSYC_MessagePartCallback message_part_cb,
+ GNUNET_PSYC_SlaveConnectCallback slave_connect_cb,
+ GNUNET_PSYC_JoinDecisionCallback join_decision_cb,
void *cls,
- const char *method_name,
- const struct GNUNET_ENV_Environment *env,
- const void *data,
- uint16_t data_size);
+ const struct GNUNET_PSYC_Message *join_msg);
/**
* Will terminate the connection to the PSYC service. Polite clients should
* first explicitly send a part request (via GNUNET_PSYC_slave_transmit()).
*
- * @param slave Slave handle.
+ * @param slave
+ * Slave handle.
+ * @param keep_active
+ * Keep place active after last application disconnected.
+ * @param part_cb
+ * Function called after the slave parted the channel
+ * and disconnected from the psyc service.
+ * @param part_cls
+ * Closure for @a part_cb.
*/
void
-GNUNET_PSYC_slave_part (struct GNUNET_PSYC_Slave *slave);
+GNUNET_PSYC_slave_part (struct GNUNET_PSYC_Slave *slave,
+ int keep_active,
+ GNUNET_ContinuationCallback part_cb,
+ void *part_cls);
/**
* correctly; not doing so correctly will result in either denying other slaves
* access or offering access to channel data to non-members.
*
- * @param channel Channel handle.
- * @param slave_key Identity of channel slave to add.
- * @param announced_at ID of the message that announced the membership change.
- * @param effective_since Addition of slave is in effect since this message ID.
+ * @param channel
+ * Channel handle.
+ * @param slave_key
+ * Identity of channel slave to add.
+ * @param announced_at
+ * ID of the message that announced the membership change.
+ * @param effective_since
+ * Addition of slave is in effect since this message ID.
+ * @param result_cb
+ * Function to call with the result of the operation.
+ * The @e result_code argument is #GNUNET_OK on success, or
+ * #GNUNET_SYSERR on error. In case of an error, the @e data argument
+ * can contain an optional error message.
+ * @param cls
+ * Closure for @a result_cb.
*/
void
GNUNET_PSYC_channel_slave_add (struct GNUNET_PSYC_Channel *channel,
- const struct GNUNET_CRYPTO_EddsaPublicKey *slave_key,
+ const struct GNUNET_CRYPTO_EcdsaPublicKey *slave_key,
uint64_t announced_at,
- uint64_t effective_since);
+ uint64_t effective_since,
+ GNUNET_ResultCallback result_cb,
+ void *cls);
/**
* denying members access or offering access to channel data to
* non-members.
*
- * @param channel Channel handle.
- * @param slave_key Identity of channel slave to remove.
- * @param announced_at ID of the message that announced the membership change.
+ * @param channel
+ * Channel handle.
+ * @param slave_key
+ * Identity of channel slave to remove.
+ * @param announced_at
+ * ID of the message that announced the membership change.
+ * @param result_cb
+ * Function to call with the result of the operation.
+ * The @e result_code argument is #GNUNET_OK on success, or
+ * #GNUNET_SYSERR on error. In case of an error, the @e data argument
+ * can contain an optional error message.
+ * @param cls
+ * Closure for @a result_cb.
*/
void
GNUNET_PSYC_channel_slave_remove (struct GNUNET_PSYC_Channel *channel,
- const struct GNUNET_CRYPTO_EddsaPublicKey
+ const struct GNUNET_CRYPTO_EcdsaPublicKey
*slave_key,
- uint64_t announced_at);
+ uint64_t announced_at,
+ GNUNET_ResultCallback result_cb,
+ void *cls);
/**
- * Function called to inform a member about stored state values for a channel.
- *
- * @param cls Closure.
- * @param name Name of the state variable. A NULL value indicates that there
- * are no more state variables to be returned.
- * @param value Value of the state variable.
- * @param value_size Number of bytes in @a value.
+ * History request handle.
*/
-typedef void
-(*GNUNET_PSYC_StateCallback) (void *cls,
- const char *name,
- const void *value,
- size_t value_size);
+struct GNUNET_PSYC_HistoryRequest;
/**
- * Function called when a requested operation has finished.
+ * Request to replay a part of the message history of the channel.
*
- * @param cls Closure.
- */
-typedef void
-(*GNUNET_PSYC_FinishCallback) (void *cls);
-
-
-/**
- * Handle to a story telling operation.
+ * Historic messages (but NOT the state at the time) will be replayed (given to
+ * the normal method handlers) if available and if access is permitted.
+ *
+ * @param channel
+ * Which channel should be replayed?
+ * @param start_message_id
+ * Earliest interesting point in history.
+ * @param end_message_id
+ * Last (inclusive) interesting point in history.
+ * @param method_prefix
+ * Retrieve only messages with a matching method prefix.
+ * @param flags
+ * OR'ed enum GNUNET_PSYC_HistoryReplayFlags
+ * @param result_cb
+ * Function to call when the requested history has been fully replayed.
+ * Once this function has been called, the client must not call
+ * GNUNET_PSYC_channel_history_replay_cancel() anymore.
+ * @param cls
+ * Closure for the callbacks.
+ *
+ * @return Handle to cancel history replay operation.
*/
-struct GNUNET_PSYC_Story;
+struct GNUNET_PSYC_HistoryRequest *
+GNUNET_PSYC_channel_history_replay (struct GNUNET_PSYC_Channel *channel,
+ uint64_t start_message_id,
+ uint64_t end_message_id,
+ const char *method_prefix,
+ uint32_t flags,
+ GNUNET_PSYC_MessageCallback message_cb,
+ GNUNET_PSYC_MessagePartCallback message_part_cb,
+ GNUNET_ResultCallback result_cb,
+ void *cls);
/**
- * Request to be told the message history of the channel.
+ * Request to replay the latest messages from the message history of the channel.
*
* Historic messages (but NOT the state at the time) will be replayed (given to
* the normal method handlers) if available and if access is permitted.
*
- * To get the latest message, use 0 for both the start and end message ID.
+ * @param channel
+ * Which channel should be replayed?
+ * @param message_limit
+ * Maximum number of messages to replay.
+ * @param flags
+ * OR'ed enum GNUNET_PSYC_HistoryReplayFlags
+ * @param finish_cb
+ * Function to call when the requested history has been fully replayed
+ * (counting message IDs might not suffice, as some messages might be
+ * secret and thus the listener would not know the story is finished
+ * without being told explicitly)o once this function has been called, the
+ * client must not call GNUNET_PSYC_channel_history_replay_cancel() anymore.
+ * @param cls
+ * Closure for the callbacks.
*
- * @param channel Which channel should be replayed?
- * @param start_message_id Earliest interesting point in history.
- * @param end_message_id Last (exclusive) interesting point in history.
- * @param message_cb Function to invoke on message parts received from the story.
- * @param finish_cb Function to call when the requested story has been fully
- * told (counting message IDs might not suffice, as some messages
- * might be secret and thus the listener would not know the story is
- * finished without being told explicitly); once this function
- * has been called, the client must not call
- * GNUNET_PSYC_channel_story_tell_cancel() anymore.
- * @param cls Closure for the callbacks.
- * @return Handle to cancel story telling operation.
+ * @return Handle to cancel history replay operation.
*/
-struct GNUNET_PSYC_Story *
-GNUNET_PSYC_channel_story_tell (struct GNUNET_PSYC_Channel *channel,
- uint64_t start_message_id,
- uint64_t end_message_id,
- GNUNET_PSYC_MessageCallback message_cb,
- GNUNET_PSYC_FinishCallback finish_cb,
- void *cls);
+struct GNUNET_PSYC_HistoryRequest *
+GNUNET_PSYC_channel_history_replay_latest (struct GNUNET_PSYC_Channel *channel,
+ uint64_t message_limit,
+ const char *method_prefix,
+ uint32_t flags,
+ GNUNET_PSYC_MessageCallback message_cb,
+ GNUNET_PSYC_MessagePartCallback message_part_cb,
+ GNUNET_ResultCallback result_cb,
+ void *cls);
+
+
+void
+GNUNET_PSYC_channel_history_replay_cancel (struct GNUNET_PSYC_Channel *channel,
+ struct GNUNET_PSYC_HistoryRequest *hr);
/**
- * Abort story telling.
+ * Function called to inform a member about stored state values for a channel.
*
- * This function must not be called from within method handlers (as given to
- * GNUNET_PSYC_slave_join()) of the slave.
+ * If @a full_value_size > value_size then this function is called multiple
+ * times until the whole value arrived.
*
- * @param story Story telling operation to stop.
+ * @param cls
+ * Closure.
+ * @param name
+ * Name of the state variable.
+ * NULL if there are no more state variables to be returned.
+ * @param value
+ * Value of the state variable.
+ * @param value_size
+ * Number of bytes in @a value.
+ * @param full_value_size
+ * Number of bytes in the full value, including continuations.
+ * Only set for the first part of a variable,
+ * in case of a continuation it is 0.
*/
-void
-GNUNET_PSYC_channel_story_tell_cancel (struct GNUNET_PSYC_Story *story);
+typedef void
+(*GNUNET_PSYC_StateVarCallback) (void *cls,
+ const struct GNUNET_MessageHeader *mod,
+ const char *name,
+ const void *value,
+ uint32_t value_size,
+ uint32_t full_value_size);
/**
- * Handle for a state query operation.
+ * State request handle.
*/
-struct GNUNET_PSYC_StateQuery;
+struct GNUNET_PSYC_StateRequest;
/**
* less-specific name is matched; for example, requesting "_a_b" will match "_a"
* if "_a_b" does not exist.
*
- * @param channel Channel handle.
- * @param full_name Full name of the requested variable, the actual variable
- * returned might have a shorter name..
- * @param cb Function called once when a matching state variable is found.
+ * @param channel
+ * Channel handle.
+ * @param full_name
+ * Full name of the requested variable.
+ * The actual variable returned might have a shorter name.
+ * @param var_cb
+ * Function called once when a matching state variable is found.
* Not called if there's no matching state variable.
- * @param cb_cls Closure for the callbacks.
- * @return Handle that can be used to cancel the query operation.
+ * @param result_cb
+ * Function called after the operation finished.
+ * (i.e. all state variables have been returned via @a state_cb)
+ * @param cls
+ * Closure for the callbacks.
*/
-struct GNUNET_PSYC_StateQuery *
+struct GNUNET_PSYC_StateRequest *
GNUNET_PSYC_channel_state_get (struct GNUNET_PSYC_Channel *channel,
const char *full_name,
- GNUNET_PSYC_StateCallback cb,
- void *cb_cls);
+ GNUNET_PSYC_StateVarCallback var_cb,
+ GNUNET_ResultCallback result_cb,
+ void *cls);
/**
* The @a state_cb is invoked on all matching state variables asynchronously, as
* the state is stored in and retrieved from the PSYCstore,
*
- * @param channel Channel handle.
- * @param name_prefix Prefix of the state variable name to match.
- * @param cb Function to call with the matching state variables.
- * @param cb_cls Closure for the callbacks.
- * @return Handle that can be used to cancel the query operation.
+ * @param channel
+ * Channel handle.
+ * @param name_prefix
+ * Prefix of the state variable name to match.
+ * @param var_cb
+ * Function called once when a matching state variable is found.
+ * Not called if there's no matching state variable.
+ * @param result_cb
+ * Function called after the operation finished.
+ * (i.e. all state variables have been returned via @a state_cb)
+ * @param cls
+ * Closure for the callbacks.
*/
-struct GNUNET_PSYC_StateQuery *
+struct GNUNET_PSYC_StateRequest *
GNUNET_PSYC_channel_state_get_prefix (struct GNUNET_PSYC_Channel *channel,
const char *name_prefix,
- GNUNET_PSYC_StateCallback cb,
- void *cb_cls);
-
+ GNUNET_PSYC_StateVarCallback var_cb,
+ GNUNET_ResultCallback result_cb,
+ void *cls);
/**
- * Cancel a state query operation.
+ * Cancel a state request operation.
*
- * @param query Handle for the operation to cancel.
+ * @param sr
+ * Handle for the operation to cancel.
*/
void
-GNUNET_PSYC_channel_state_get_cancel (struct GNUNET_PSYC_StateQuery *query);
+GNUNET_PSYC_channel_state_get_cancel (struct GNUNET_PSYC_StateRequest *sr);
+
#if 0 /* keep Emacsens' auto-indent happy */
projects / oweals / gnunet.git / blobdiff