/*
This file is part of GNUnet
Copyright (C) 2013-2017, 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 .
SPDX-License-Identifier: AGPL3.0-or-later
*/
/**
* @file setu/gnunet-service-setu.c
* @brief set union operation
* @author Florian Dold
* @author Christian Grothoff
*/
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_statistics_service.h"
#include "ibf.h"
#include "gnunet_protocols.h"
#include "gnunet_applications.h"
#include "gnunet_cadet_service.h"
#include "gnunet-service-setu_strata_estimator.h"
#include "gnunet-service-setu_protocol.h"
#include "gnunet_statistics_service.h"
#include
#include "gnunet_setu_service.h"
#include "setu.h"
#define LOG(kind, ...) GNUNET_log_from (kind, "setu", __VA_ARGS__)
/**
* How long do we hold on to an incoming channel if there is
* no local listener before giving up?
*/
#define INCOMING_CHANNEL_TIMEOUT GNUNET_TIME_UNIT_MINUTES
/**
* Number of IBFs in a strata estimator.
*/
#define SE_STRATA_COUNT 32
/**
* Size of the IBFs in the strata estimator.
*/
#define SE_IBF_SIZE 80
/**
* The hash num parameter for the difference digests and strata estimators.
*/
#define SE_IBF_HASH_NUM 4
/**
* Number of buckets that can be transmitted in one message.
*/
#define MAX_BUCKETS_PER_MESSAGE ((1 << 15) / IBF_BUCKET_SIZE)
/**
* The maximum size of an ibf we use is 2^(MAX_IBF_ORDER).
* Choose this value so that computing the IBF is still cheaper
* than transmitting all values.
*/
#define MAX_IBF_ORDER (20)
/**
* Number of buckets used in the ibf per estimated
* difference.
*/
#define IBF_ALPHA 4
/**
* Current phase we are in for a union operation.
*/
enum UnionOperationPhase
{
/**
* We sent the request message, and expect a strata estimator.
*/
PHASE_EXPECT_SE,
/**
* We sent the strata estimator, and expect an IBF. This phase is entered once
* upon initialization and later via #PHASE_EXPECT_ELEMENTS_AND_REQUESTS.
*
* XXX: could use better wording.
* XXX: repurposed to also expect a "request full set" message, should be renamed
*
* After receiving the complete IBF, we enter #PHASE_EXPECT_ELEMENTS
*/
PHASE_EXPECT_IBF,
/**
* Continuation for multi part IBFs.
*/
PHASE_EXPECT_IBF_LAST,
/**
* We are decoding an IBF.
*/
PHASE_ACTIVE_DECODING,
/**
* The other peer is decoding the IBF we just sent.
*/
PHASE_PASSIVE_DECODING,
/**
* The protocol is almost finished, but we still have to flush our message
* queue and/or expect some elements.
*/
PHASE_FINISH_CLOSING,
/**
* In the penultimate phase, we wait until all our demands are satisfied.
* Then we send a done message, and wait for another done message.
*/
PHASE_FINISH_WAITING,
/**
* In the ultimate phase, we wait until our demands are satisfied and then
* quit (sending another DONE message).
*/
PHASE_FINISHED,
/**
* After sending the full set, wait for responses with the elements
* that the local peer is missing.
*/
PHASE_FULL_SENDING,
/**
* Phase that receives full set first and then sends elements that are
* the local peer missing
*/
PHASE_FULL_RECEIVING
};
/**
* Information about an element element in the set. All elements are
* stored in a hash-table from their hash-code to their `struct
* Element`, so that the remove and add operations are reasonably
* fast.
*/
struct ElementEntry
{
/**
* The actual element. The data for the element
* should be allocated at the end of this struct.
*/
struct GNUNET_SETU_Element element;
/**
* Hash of the element. For set union: Will be used to derive the
* different IBF keys for different salts.
*/
struct GNUNET_HashCode element_hash;
/**
* First generation that includes this element.
*/
unsigned int generation;
/**
* #GNUNET_YES if the element is a remote element, and does not belong
* to the operation's set.
*/
int remote;
};
/**
* A listener is inhabited by a client, and waits for evaluation
* requests from remote peers.
*/
struct Listener;
/**
* A set that supports a specific operation with other peers.
*/
struct Set;
/**
* State we keep per client.
*/
struct ClientState
{
/**
* Set, if associated with the client, otherwise NULL.
*/
struct Set *set;
/**
* Listener, if associated with the client, otherwise NULL.
*/
struct Listener *listener;
/**
* Client handle.
*/
struct GNUNET_SERVICE_Client *client;
/**
* Message queue.
*/
struct GNUNET_MQ_Handle *mq;
};
/**
* Operation context used to execute a set operation.
*/
struct Operation
{
/**
* The identity of the requesting peer. Needs to
* be stored here as the op spec might not have been created yet.
*/
struct GNUNET_PeerIdentity peer;
/**
* Initial size of our set, just before the operation started.
*/
uint64_t initial_size;
/**
* Kept in a DLL of the listener, if @e listener is non-NULL.
*/
struct Operation *next;
/**
* Kept in a DLL of the listener, if @e listener is non-NULL.
*/
struct Operation *prev;
/**
* Channel to the peer.
*/
struct GNUNET_CADET_Channel *channel;
/**
* Port this operation runs on.
*/
struct Listener *listener;
/**
* Message queue for the channel.
*/
struct GNUNET_MQ_Handle *mq;
/**
* Context message, may be NULL.
*/
struct GNUNET_MessageHeader *context_msg;
/**
* Set associated with the operation, NULL until the spec has been
* associated with a set.
*/
struct Set *set;
/**
* Copy of the set's strata estimator at the time of
* creation of this operation.
*/
struct StrataEstimator *se;
/**
* The IBF we currently receive.
*/
struct InvertibleBloomFilter *remote_ibf;
/**
* The IBF with the local set's element.
*/
struct InvertibleBloomFilter *local_ibf;
/**
* Maps unsalted IBF-Keys to elements.
* Used as a multihashmap, the keys being the lower 32bit of the IBF-Key.
* Colliding IBF-Keys are linked.
*/
struct GNUNET_CONTAINER_MultiHashMap32 *key_to_element;
/**
* Timeout task, if the incoming peer has not been accepted
* after the timeout, it will be disconnected.
*/
struct GNUNET_SCHEDULER_Task *timeout_task;
/**
* Hashes for elements that we have demanded from the other peer.
*/
struct GNUNET_CONTAINER_MultiHashMap *demanded_hashes;
/**
* Current state of the operation.
*/
enum UnionOperationPhase phase;
/**
* Did we send the client that we are done?
*/
int client_done_sent;
/**
* Number of ibf buckets already received into the @a remote_ibf.
*/
unsigned int ibf_buckets_received;
/**
* Salt that we're using for sending IBFs
*/
uint32_t salt_send;
/**
* Salt for the IBF we've received and that we're currently decoding.
*/
uint32_t salt_receive;
/**
* Number of elements we received from the other peer
* that were not in the local set yet.
*/
uint32_t received_fresh;
/**
* Total number of elements received from the other peer.
*/
uint32_t received_total;
/**
* Salt to use for the operation.
*/
uint32_t salt;
/**
* Remote peers element count
*/
uint32_t remote_element_count;
/**
* ID used to identify an operation between service and client
*/
uint32_t client_request_id;
/**
* Always use delta operation instead of sending full sets,
* even it it's less efficient.
*/
int force_delta;
/**
* Always send full sets, even if delta operations would
* be more efficient.
*/
int force_full;
/**
* #GNUNET_YES to fail operations where Byzantine faults
* are suspected
*/
int byzantine;
/**
* #GNUNET_YES to also send back set elements we are sending to
* the remote peer.
*/
int symmetric;
/**
* Lower bound for the set size, used only when
* byzantine mode is enabled.
*/
int byzantine_lower_bound;
/**
* Unique request id for the request from a remote peer, sent to the
* client, which will accept or reject the request. Set to '0' iff
* the request has not been suggested yet.
*/
uint32_t suggest_id;
/**
* Generation in which the operation handle
* was created.
*/
unsigned int generation_created;
};
/**
* SetContent stores the actual set elements, which may be shared by
* multiple generations derived from one set.
*/
struct SetContent
{
/**
* Maps `struct GNUNET_HashCode *` to `struct ElementEntry *`.
*/
struct GNUNET_CONTAINER_MultiHashMap *elements;
/**
* Number of references to the content.
*/
unsigned int refcount;
/**
* FIXME: document!
*/
unsigned int latest_generation;
/**
* Number of concurrently active iterators.
*/
int iterator_count;
};
/**
* A set that supports a specific operation with other peers.
*/
struct Set
{
/**
* Sets are held in a doubly linked list (in `sets_head` and `sets_tail`).
*/
struct Set *next;
/**
* Sets are held in a doubly linked list.
*/
struct Set *prev;
/**
* Client that owns the set. Only one client may own a set,
* and there can only be one set per client.
*/
struct ClientState *cs;
/**
* Content, possibly shared by multiple sets,
* and thus reference counted.
*/
struct SetContent *content;
/**
* The strata estimator is only generated once for each set. The IBF keys
* are derived from the element hashes with salt=0.
*/
struct StrataEstimator *se;
/**
* Evaluate operations are held in a linked list.
*/
struct Operation *ops_head;
/**
* Evaluate operations are held in a linked list.
*/
struct Operation *ops_tail;
/**
* Current generation, that is, number of previously executed
* operations and lazy copies on the underlying set content.
*/
unsigned int current_generation;
};
/**
* The key entry is used to associate an ibf key with an element.
*/
struct KeyEntry
{
/**
* IBF key for the entry, derived from the current salt.
*/
struct IBF_Key ibf_key;
/**
* The actual element associated with the key.
*
* Only owned by the union operation if element->operation
* is #GNUNET_YES.
*/
struct ElementEntry *element;
/**
* Did we receive this element? Even if element->is_foreign is false, we
* might have received the element, so this indicates that the other peer
* has it.
*/
int received;
};
/**
* Used as a closure for sending elements
* with a specific IBF key.
*/
struct SendElementClosure
{
/**
* The IBF key whose matching elements should be
* sent.
*/
struct IBF_Key ibf_key;
/**
* Operation for which the elements
* should be sent.
*/
struct Operation *op;
};
/**
* A listener is inhabited by a client, and waits for evaluation
* requests from remote peers.
*/
struct Listener
{
/**
* Listeners are held in a doubly linked list.
*/
struct Listener *next;
/**
* Listeners are held in a doubly linked list.
*/
struct Listener *prev;
/**
* Head of DLL of operations this listener is responsible for.
* Once the client has accepted/declined the operation, the
* operation is moved to the respective set's operation DLLS.
*/
struct Operation *op_head;
/**
* Tail of DLL of operations this listener is responsible for.
* Once the client has accepted/declined the operation, the
* operation is moved to the respective set's operation DLLS.
*/
struct Operation *op_tail;
/**
* Client that owns the listener.
* Only one client may own a listener.
*/
struct ClientState *cs;
/**
* The port we are listening on with CADET.
*/
struct GNUNET_CADET_Port *open_port;
/**
* Application ID for the operation, used to distinguish
* multiple operations of the same type with the same peer.
*/
struct GNUNET_HashCode app_id;
};
/**
* Handle to the cadet service, used to listen for and connect to
* remote peers.
*/
static struct GNUNET_CADET_Handle *cadet;
/**
* Statistics handle.
*/
static struct GNUNET_STATISTICS_Handle *_GSS_statistics;
/**
* Listeners are held in a doubly linked list.
*/
static struct Listener *listener_head;
/**
* Listeners are held in a doubly linked list.
*/
static struct Listener *listener_tail;
/**
* Number of active clients.
*/
static unsigned int num_clients;
/**
* Are we in shutdown? if #GNUNET_YES and the number of clients
* drops to zero, disconnect from CADET.
*/
static int in_shutdown;
/**
* Counter for allocating unique IDs for clients, used to identify incoming
* operation requests from remote peers, that the client can choose to accept
* or refuse. 0 must not be used (reserved for uninitialized).
*/
static uint32_t suggest_id;
/**
* Iterator over hash map entries, called to
* destroy the linked list of colliding ibf key entries.
*
* @param cls closure
* @param key current key code
* @param value value in the hash map
* @return #GNUNET_YES if we should continue to iterate,
* #GNUNET_NO if not.
*/
static int
destroy_key_to_element_iter (void *cls,
uint32_t key,
void *value)
{
struct KeyEntry *k = value;
GNUNET_assert (NULL != k);
if (GNUNET_YES == k->element->remote)
{
GNUNET_free (k->element);
k->element = NULL;
}
GNUNET_free (k);
return GNUNET_YES;
}
/**
* Signal to the client that the operation has finished and
* destroy the operation.
*
* @param cls operation to destroy
*/
static void
send_client_done (void *cls)
{
struct Operation *op = cls;
struct GNUNET_MQ_Envelope *ev;
struct GNUNET_SETU_ResultMessage *rm;
if (GNUNET_YES == op->client_done_sent)
return;
if (PHASE_FINISHED != op->phase)
{
LOG (GNUNET_ERROR_TYPE_WARNING,
"Union operation failed\n");
GNUNET_STATISTICS_update (_GSS_statistics,
"# Union operations failed",
1,
GNUNET_NO);
ev = GNUNET_MQ_msg (rm, GNUNET_MESSAGE_TYPE_SETU_RESULT);
rm->result_status = htons (GNUNET_SETU_STATUS_FAILURE);
rm->request_id = htonl (op->client_request_id);
rm->element_type = htons (0);
GNUNET_MQ_send (op->set->cs->mq,
ev);
return;
}
op->client_done_sent = GNUNET_YES;
GNUNET_STATISTICS_update (_GSS_statistics,
"# Union operations succeeded",
1,
GNUNET_NO);
LOG (GNUNET_ERROR_TYPE_INFO,
"Signalling client that union operation is done\n");
ev = GNUNET_MQ_msg (rm,
GNUNET_MESSAGE_TYPE_SETU_RESULT);
rm->request_id = htonl (op->client_request_id);
rm->result_status = htons (GNUNET_SETU_STATUS_DONE);
rm->element_type = htons (0);
rm->current_size = GNUNET_htonll (GNUNET_CONTAINER_multihashmap32_size (
op->key_to_element));
GNUNET_MQ_send (op->set->cs->mq,
ev);
}
/* FIXME: the destroy logic is a mess and should be cleaned up! */
/**
* Destroy the given operation. Used for any operation where both
* peers were known and that thus actually had a vt and channel. Must
* not be used for operations where 'listener' is still set and we do
* not know the other peer.
*
* Call the implementation-specific cancel function of the operation.
* Disconnects from the remote peer. Does not disconnect the client,
* as there may be multiple operations per set.
*
* @param op operation to destroy
*/
static void
_GSS_operation_destroy (struct Operation *op)
{
struct Set *set = op->set;
struct GNUNET_CADET_Channel *channel;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Destroying union operation %p\n",
op);
GNUNET_assert (NULL == op->listener);
/* check if the op was canceled twice */
if (NULL != op->remote_ibf)
{
ibf_destroy (op->remote_ibf);
op->remote_ibf = NULL;
}
if (NULL != op->demanded_hashes)
{
GNUNET_CONTAINER_multihashmap_destroy (op->demanded_hashes);
op->demanded_hashes = NULL;
}
if (NULL != op->local_ibf)
{
ibf_destroy (op->local_ibf);
op->local_ibf = NULL;
}
if (NULL != op->se)
{
strata_estimator_destroy (op->se);
op->se = NULL;
}
if (NULL != op->key_to_element)
{
GNUNET_CONTAINER_multihashmap32_iterate (op->key_to_element,
&destroy_key_to_element_iter,
NULL);
GNUNET_CONTAINER_multihashmap32_destroy (op->key_to_element);
op->key_to_element = NULL;
}
if (NULL != set)
{
GNUNET_CONTAINER_DLL_remove (set->ops_head,
set->ops_tail,
op);
op->set = NULL;
}
if (NULL != op->context_msg)
{
GNUNET_free (op->context_msg);
op->context_msg = NULL;
}
if (NULL != (channel = op->channel))
{
/* This will free op; called conditionally as this helper function
is also called from within the channel disconnect handler. */
op->channel = NULL;
GNUNET_CADET_channel_destroy (channel);
}
/* We rely on the channel end handler to free 'op'. When 'op->channel' was NULL,
* there was a channel end handler that will free 'op' on the call stack. */
}
/**
* This function probably should not exist
* and be replaced by inlining more specific
* logic in the various places where it is called.
*/
static void
_GSS_operation_destroy2 (struct Operation *op);
/**
* Destroy an incoming request from a remote peer
*
* @param op remote request to destroy
*/
static void
incoming_destroy (struct Operation *op)
{
struct Listener *listener;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Destroying incoming operation %p\n",
op);
if (NULL != (listener = op->listener))
{
GNUNET_CONTAINER_DLL_remove (listener->op_head,
listener->op_tail,
op);
op->listener = NULL;
}
if (NULL != op->timeout_task)
{
GNUNET_SCHEDULER_cancel (op->timeout_task);
op->timeout_task = NULL;
}
_GSS_operation_destroy2 (op);
}
/**
* This function probably should not exist
* and be replaced by inlining more specific
* logic in the various places where it is called.
*/
static void
_GSS_operation_destroy2 (struct Operation *op)
{
struct GNUNET_CADET_Channel *channel;
if (NULL != (channel = op->channel))
{
/* This will free op; called conditionally as this helper function
is also called from within the channel disconnect handler. */
op->channel = NULL;
GNUNET_CADET_channel_destroy (channel);
}
if (NULL != op->listener)
{
incoming_destroy (op);
return;
}
if (NULL != op->set)
send_client_done (op);
_GSS_operation_destroy (op);
GNUNET_free (op);
}
/**
* Inform the client that the union operation has failed,
* and proceed to destroy the evaluate operation.
*
* @param op the union operation to fail
*/
static void
fail_union_operation (struct Operation *op)
{
struct GNUNET_MQ_Envelope *ev;
struct GNUNET_SETU_ResultMessage *msg;
LOG (GNUNET_ERROR_TYPE_WARNING,
"union operation failed\n");
ev = GNUNET_MQ_msg (msg, GNUNET_MESSAGE_TYPE_SETU_RESULT);
msg->result_status = htons (GNUNET_SETU_STATUS_FAILURE);
msg->request_id = htonl (op->client_request_id);
msg->element_type = htons (0);
GNUNET_MQ_send (op->set->cs->mq,
ev);
_GSS_operation_destroy (op);
}
/**
* Derive the IBF key from a hash code and
* a salt.
*
* @param src the hash code
* @return the derived IBF key
*/
static struct IBF_Key
get_ibf_key (const struct GNUNET_HashCode *src)
{
struct IBF_Key key;
uint16_t salt = 0;
GNUNET_assert (GNUNET_OK ==
GNUNET_CRYPTO_kdf (&key, sizeof(key),
src, sizeof *src,
&salt, sizeof(salt),
NULL, 0));
return key;
}
/**
* Context for #op_get_element_iterator
*/
struct GetElementContext
{
/**
* FIXME.
*/
struct GNUNET_HashCode hash;
/**
* FIXME.
*/
struct KeyEntry *k;
};
/**
* Iterator over the mapping from IBF keys to element entries. Checks if we
* have an element with a given GNUNET_HashCode.
*
* @param cls closure
* @param key current key code
* @param value value in the hash map
* @return #GNUNET_YES if we should search further,
* #GNUNET_NO if we've found the element.
*/
static int
op_get_element_iterator (void *cls,
uint32_t key,
void *value)
{
struct GetElementContext *ctx = cls;
struct KeyEntry *k = value;
GNUNET_assert (NULL != k);
if (0 == GNUNET_CRYPTO_hash_cmp (&k->element->element_hash,
&ctx->hash))
{
ctx->k = k;
return GNUNET_NO;
}
return GNUNET_YES;
}
/**
* Determine whether the given element is already in the operation's element
* set.
*
* @param op operation that should be tested for 'element_hash'
* @param element_hash hash of the element to look for
* @return #GNUNET_YES if the element has been found, #GNUNET_NO otherwise
*/
static struct KeyEntry *
op_get_element (struct Operation *op,
const struct GNUNET_HashCode *element_hash)
{
int ret;
struct IBF_Key ibf_key;
struct GetElementContext ctx = { { { 0 } }, 0 };
ctx.hash = *element_hash;
ibf_key = get_ibf_key (element_hash);
ret = GNUNET_CONTAINER_multihashmap32_get_multiple (op->key_to_element,
(uint32_t) ibf_key.key_val,
&op_get_element_iterator,
&ctx);
/* was the iteration aborted because we found the element? */
if (GNUNET_SYSERR == ret)
{
GNUNET_assert (NULL != ctx.k);
return ctx.k;
}
return NULL;
}
/**
* Insert an element into the union operation's
* key-to-element mapping. Takes ownership of 'ee'.
* Note that this does not insert the element in the set,
* only in the operation's key-element mapping.
* This is done to speed up re-tried operations, if some elements
* were transmitted, and then the IBF fails to decode.
*
* XXX: clarify ownership, doesn't sound right.
*
* @param op the union operation
* @param ee the element entry
* @parem received was this element received from the remote peer?
*/
static void
op_register_element (struct Operation *op,
struct ElementEntry *ee,
int received)
{
struct IBF_Key ibf_key;
struct KeyEntry *k;
ibf_key = get_ibf_key (&ee->element_hash);
k = GNUNET_new (struct KeyEntry);
k->element = ee;
k->ibf_key = ibf_key;
k->received = received;
GNUNET_assert (GNUNET_OK ==
GNUNET_CONTAINER_multihashmap32_put (op->key_to_element,
(uint32_t) ibf_key.key_val,
k,
GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
}
/**
* Modify an IBF key @a k_in based on the @a salt, returning a
* salted key in @a k_out.
*/
static void
salt_key (const struct IBF_Key *k_in,
uint32_t salt,
struct IBF_Key *k_out)
{
int s = salt % 64;
uint64_t x = k_in->key_val;
/* rotate ibf key */
x = (x >> s) | (x << (64 - s));
k_out->key_val = x;
}
/**
* FIXME.
*/
static void
unsalt_key (const struct IBF_Key *k_in,
uint32_t salt,
struct IBF_Key *k_out)
{
int s = salt % 64;
uint64_t x = k_in->key_val;
x = (x << s) | (x >> (64 - s));
k_out->key_val = x;
}
/**
* Insert a key into an ibf.
*
* @param cls the ibf
* @param key unused
* @param value the key entry to get the key from
*/
static int
prepare_ibf_iterator (void *cls,
uint32_t key,
void *value)
{
struct Operation *op = cls;
struct KeyEntry *ke = value;
struct IBF_Key salted_key;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"[OP %p] inserting %lx (hash %s) into ibf\n",
op,
(unsigned long) ke->ibf_key.key_val,
GNUNET_h2s (&ke->element->element_hash));
salt_key (&ke->ibf_key,
op->salt_send,
&salted_key);
ibf_insert (op->local_ibf, salted_key);
return GNUNET_YES;
}
/**
* Is element @a ee part of the set used by @a op?
*
* @param ee element to test
* @param op operation the defines the set and its generation
* @return #GNUNET_YES if the element is in the set, #GNUNET_NO if not
*/
static int
_GSS_is_element_of_operation (struct ElementEntry *ee,
struct Operation *op)
{
return ee->generation >= op->generation_created;
}
/**
* Iterator for initializing the
* key-to-element mapping of a union operation
*
* @param cls the union operation `struct Operation *`
* @param key unused
* @param value the `struct ElementEntry *` to insert
* into the key-to-element mapping
* @return #GNUNET_YES (to continue iterating)
*/
static int
init_key_to_element_iterator (void *cls,
const struct GNUNET_HashCode *key,
void *value)
{
struct Operation *op = cls;
struct ElementEntry *ee = value;
/* make sure that the element belongs to the set at the time
* of creating the operation */
if (GNUNET_NO ==
_GSS_is_element_of_operation (ee,
op))
return GNUNET_YES;
GNUNET_assert (GNUNET_NO == ee->remote);
op_register_element (op,
ee,
GNUNET_NO);
return GNUNET_YES;
}
/**
* Initialize the IBF key to element mapping local to this set operation.
*
* @param op the set union operation
*/
static void
initialize_key_to_element (struct Operation *op)
{
unsigned int len;
GNUNET_assert (NULL == op->key_to_element);
len = GNUNET_CONTAINER_multihashmap_size (op->set->content->elements);
op->key_to_element = GNUNET_CONTAINER_multihashmap32_create (len + 1);
GNUNET_CONTAINER_multihashmap_iterate (op->set->content->elements,
&init_key_to_element_iterator,
op);
}
/**
* Create an ibf with the operation's elements
* of the specified size
*
* @param op the union operation
* @param size size of the ibf to create
* @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
*/
static int
prepare_ibf (struct Operation *op,
uint32_t size)
{
GNUNET_assert (NULL != op->key_to_element);
if (NULL != op->local_ibf)
ibf_destroy (op->local_ibf);
op->local_ibf = ibf_create (size, SE_IBF_HASH_NUM);
if (NULL == op->local_ibf)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Failed to allocate local IBF\n");
return GNUNET_SYSERR;
}
GNUNET_CONTAINER_multihashmap32_iterate (op->key_to_element,
&prepare_ibf_iterator,
op);
return GNUNET_OK;
}
/**
* Send an ibf of appropriate size.
*
* Fragments the IBF into multiple messages if necessary.
*
* @param op the union operation
* @param ibf_order order of the ibf to send, size=2^order
* @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
*/
static int
send_ibf (struct Operation *op,
uint16_t ibf_order)
{
unsigned int buckets_sent = 0;
struct InvertibleBloomFilter *ibf;
if (GNUNET_OK !=
prepare_ibf (op, 1 << ibf_order))
{
/* allocation failed */
return GNUNET_SYSERR;
}
LOG (GNUNET_ERROR_TYPE_DEBUG,
"sending ibf of size %u\n",
1 << ibf_order);
{
char name[64];
GNUNET_snprintf (name, sizeof(name), "# sent IBF (order %u)", ibf_order);
GNUNET_STATISTICS_update (_GSS_statistics, name, 1, GNUNET_NO);
}
ibf = op->local_ibf;
while (buckets_sent < (1 << ibf_order))
{
unsigned int buckets_in_message;
struct GNUNET_MQ_Envelope *ev;
struct IBFMessage *msg;
buckets_in_message = (1 << ibf_order) - buckets_sent;
/* limit to maximum */
if (buckets_in_message > MAX_BUCKETS_PER_MESSAGE)
buckets_in_message = MAX_BUCKETS_PER_MESSAGE;
ev = GNUNET_MQ_msg_extra (msg,
buckets_in_message * IBF_BUCKET_SIZE,
GNUNET_MESSAGE_TYPE_SETU_P2P_IBF);
msg->reserved1 = 0;
msg->reserved2 = 0;
msg->order = ibf_order;
msg->offset = htonl (buckets_sent);
msg->salt = htonl (op->salt_send);
ibf_write_slice (ibf, buckets_sent,
buckets_in_message, &msg[1]);
buckets_sent += buckets_in_message;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"ibf chunk size %u, %u/%u sent\n",
buckets_in_message,
buckets_sent,
1 << ibf_order);
GNUNET_MQ_send (op->mq, ev);
}
/* The other peer must decode the IBF, so
* we're passive. */
op->phase = PHASE_PASSIVE_DECODING;
return GNUNET_OK;
}
/**
* Compute the necessary order of an ibf
* from the size of the symmetric set difference.
*
* @param diff the difference
* @return the required size of the ibf
*/
static unsigned int
get_order_from_difference (unsigned int diff)
{
unsigned int ibf_order;
ibf_order = 2;
while (((1 << ibf_order) < (IBF_ALPHA * diff) ||
((1 << ibf_order) < SE_IBF_HASH_NUM)) &&
(ibf_order < MAX_IBF_ORDER))
ibf_order++;
// add one for correction
return ibf_order + 1;
}
/**
* Send a set element.
*
* @param cls the union operation `struct Operation *`
* @param key unused
* @param value the `struct ElementEntry *` to insert
* into the key-to-element mapping
* @return #GNUNET_YES (to continue iterating)
*/
static int
send_full_element_iterator (void *cls,
const struct GNUNET_HashCode *key,
void *value)
{
struct Operation *op = cls;
struct GNUNET_SETU_ElementMessage *emsg;
struct ElementEntry *ee = value;
struct GNUNET_SETU_Element *el = &ee->element;
struct GNUNET_MQ_Envelope *ev;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Sending element %s\n",
GNUNET_h2s (key));
ev = GNUNET_MQ_msg_extra (emsg,
el->size,
GNUNET_MESSAGE_TYPE_SETU_P2P_FULL_ELEMENT);
emsg->element_type = htons (el->element_type);
GNUNET_memcpy (&emsg[1],
el->data,
el->size);
GNUNET_MQ_send (op->mq,
ev);
return GNUNET_YES;
}
/**
* Switch to full set transmission for @a op.
*
* @param op operation to switch to full set transmission.
*/
static void
send_full_set (struct Operation *op)
{
struct GNUNET_MQ_Envelope *ev;
op->phase = PHASE_FULL_SENDING;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Dedicing to transmit the full set\n");
/* FIXME: use a more memory-friendly way of doing this with an
iterator, just as we do in the non-full case! */
(void) GNUNET_CONTAINER_multihashmap_iterate (op->set->content->elements,
&send_full_element_iterator,
op);
ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_SETU_P2P_FULL_DONE);
GNUNET_MQ_send (op->mq,
ev);
}
/**
* Handle a strata estimator from a remote peer
*
* @param cls the union operation
* @param msg the message
*/
static int
check_union_p2p_strata_estimator (void *cls,
const struct StrataEstimatorMessage *msg)
{
struct Operation *op = cls;
int is_compressed;
size_t len;
if (op->phase != PHASE_EXPECT_SE)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
is_compressed = (GNUNET_MESSAGE_TYPE_SETU_P2P_SEC == htons (
msg->header.type));
len = ntohs (msg->header.size) - sizeof(struct StrataEstimatorMessage);
if ((GNUNET_NO == is_compressed) &&
(len != SE_STRATA_COUNT * SE_IBF_SIZE * IBF_BUCKET_SIZE))
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
return GNUNET_OK;
}
/**
* Handle a strata estimator from a remote peer
*
* @param cls the union operation
* @param msg the message
*/
static void
handle_union_p2p_strata_estimator (void *cls,
const struct StrataEstimatorMessage *msg)
{
struct Operation *op = cls;
struct StrataEstimator *remote_se;
unsigned int diff;
uint64_t other_size;
size_t len;
int is_compressed;
is_compressed = (GNUNET_MESSAGE_TYPE_SETU_P2P_SEC == htons (
msg->header.type));
GNUNET_STATISTICS_update (_GSS_statistics,
"# bytes of SE received",
ntohs (msg->header.size),
GNUNET_NO);
len = ntohs (msg->header.size) - sizeof(struct StrataEstimatorMessage);
other_size = GNUNET_ntohll (msg->set_size);
remote_se = strata_estimator_create (SE_STRATA_COUNT,
SE_IBF_SIZE,
SE_IBF_HASH_NUM);
if (NULL == remote_se)
{
/* insufficient resources, fail */
fail_union_operation (op);
return;
}
if (GNUNET_OK !=
strata_estimator_read (&msg[1],
len,
is_compressed,
remote_se))
{
/* decompression failed */
strata_estimator_destroy (remote_se);
fail_union_operation (op);
return;
}
GNUNET_assert (NULL != op->se);
diff = strata_estimator_difference (remote_se,
op->se);
if (diff > 200)
diff = diff * 3 / 2;
strata_estimator_destroy (remote_se);
strata_estimator_destroy (op->se);
op->se = NULL;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"got se diff=%d, using ibf size %d\n",
diff,
1U << get_order_from_difference (diff));
{
char *set_debug;
set_debug = getenv ("GNUNET_SETU_BENCHMARK");
if ((NULL != set_debug) &&
(0 == strcmp (set_debug, "1")))
{
FILE *f = fopen ("set.log", "a");
fprintf (f, "%llu\n", (unsigned long long) diff);
fclose (f);
}
}
if ((GNUNET_YES == op->byzantine) &&
(other_size < op->byzantine_lower_bound))
{
GNUNET_break (0);
fail_union_operation (op);
return;
}
if ((GNUNET_YES == op->force_full) ||
(diff > op->initial_size / 4) ||
(0 == other_size))
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Deciding to go for full set transmission (diff=%d, own set=%llu)\n",
diff,
(unsigned long long) op->initial_size);
GNUNET_STATISTICS_update (_GSS_statistics,
"# of full sends",
1,
GNUNET_NO);
if ((op->initial_size <= other_size) ||
(0 == other_size))
{
send_full_set (op);
}
else
{
struct GNUNET_MQ_Envelope *ev;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Telling other peer that we expect its full set\n");
op->phase = PHASE_FULL_RECEIVING;
ev = GNUNET_MQ_msg_header (
GNUNET_MESSAGE_TYPE_SETU_P2P_REQUEST_FULL);
GNUNET_MQ_send (op->mq,
ev);
}
}
else
{
GNUNET_STATISTICS_update (_GSS_statistics,
"# of ibf sends",
1,
GNUNET_NO);
if (GNUNET_OK !=
send_ibf (op,
get_order_from_difference (diff)))
{
/* Internal error, best we can do is shut the connection */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Failed to send IBF, closing connection\n");
fail_union_operation (op);
return;
}
}
GNUNET_CADET_receive_done (op->channel);
}
/**
* Iterator to send elements to a remote peer
*
* @param cls closure with the element key and the union operation
* @param key ignored
* @param value the key entry
*/
static int
send_offers_iterator (void *cls,
uint32_t key,
void *value)
{
struct SendElementClosure *sec = cls;
struct Operation *op = sec->op;
struct KeyEntry *ke = value;
struct GNUNET_MQ_Envelope *ev;
struct GNUNET_MessageHeader *mh;
/* Detect 32-bit key collision for the 64-bit IBF keys. */
if (ke->ibf_key.key_val != sec->ibf_key.key_val)
return GNUNET_YES;
ev = GNUNET_MQ_msg_header_extra (mh,
sizeof(struct GNUNET_HashCode),
GNUNET_MESSAGE_TYPE_SETU_P2P_OFFER);
GNUNET_assert (NULL != ev);
*(struct GNUNET_HashCode *) &mh[1] = ke->element->element_hash;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"[OP %p] sending element offer (%s) to peer\n",
op,
GNUNET_h2s (&ke->element->element_hash));
GNUNET_MQ_send (op->mq, ev);
return GNUNET_YES;
}
/**
* Send offers (in the form of GNUNET_Hash-es) to the remote peer for the given IBF key.
*
* @param op union operation
* @param ibf_key IBF key of interest
*/
static void
send_offers_for_key (struct Operation *op,
struct IBF_Key ibf_key)
{
struct SendElementClosure send_cls;
send_cls.ibf_key = ibf_key;
send_cls.op = op;
(void) GNUNET_CONTAINER_multihashmap32_get_multiple (
op->key_to_element,
(uint32_t) ibf_key.
key_val,
&send_offers_iterator,
&send_cls);
}
/**
* Decode which elements are missing on each side, and
* send the appropriate offers and inquiries.
*
* @param op union operation
* @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
*/
static int
decode_and_send (struct Operation *op)
{
struct IBF_Key key;
struct IBF_Key last_key;
int side;
unsigned int num_decoded;
struct InvertibleBloomFilter *diff_ibf;
GNUNET_assert (PHASE_ACTIVE_DECODING == op->phase);
if (GNUNET_OK !=
prepare_ibf (op,
op->remote_ibf->size))
{
GNUNET_break (0);
/* allocation failed */
return GNUNET_SYSERR;
}
diff_ibf = ibf_dup (op->local_ibf);
ibf_subtract (diff_ibf,
op->remote_ibf);
ibf_destroy (op->remote_ibf);
op->remote_ibf = NULL;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"decoding IBF (size=%u)\n",
diff_ibf->size);
num_decoded = 0;
key.key_val = 0; /* just to avoid compiler thinking we use undef'ed variable */
while (1)
{
int res;
int cycle_detected = GNUNET_NO;
last_key = key;
res = ibf_decode (diff_ibf,
&side,
&key);
if (res == GNUNET_OK)
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
"decoded ibf key %lx\n",
(unsigned long) key.key_val);
num_decoded += 1;
if ((num_decoded > diff_ibf->size) ||
((num_decoded > 1) &&
(last_key.key_val == key.key_val)))
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
"detected cyclic ibf (decoded %u/%u)\n",
num_decoded,
diff_ibf->size);
cycle_detected = GNUNET_YES;
}
}
if ((GNUNET_SYSERR == res) ||
(GNUNET_YES == cycle_detected))
{
int next_order;
next_order = 0;
while (1 << next_order < diff_ibf->size)
next_order++;
next_order++;
if (next_order <= MAX_IBF_ORDER)
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
"decoding failed, sending larger ibf (size %u)\n",
1 << next_order);
GNUNET_STATISTICS_update (_GSS_statistics,
"# of IBF retries",
1,
GNUNET_NO);
op->salt_send++;
if (GNUNET_OK !=
send_ibf (op, next_order))
{
/* Internal error, best we can do is shut the connection */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Failed to send IBF, closing connection\n");
fail_union_operation (op);
ibf_destroy (diff_ibf);
return GNUNET_SYSERR;
}
}
else
{
GNUNET_STATISTICS_update (_GSS_statistics,
"# of failed union operations (too large)",
1,
GNUNET_NO);
// XXX: Send the whole set, element-by-element
LOG (GNUNET_ERROR_TYPE_ERROR,
"set union failed: reached ibf limit\n");
fail_union_operation (op);
ibf_destroy (diff_ibf);
return GNUNET_SYSERR;
}
break;
}
if (GNUNET_NO == res)
{
struct GNUNET_MQ_Envelope *ev;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"transmitted all values, sending DONE\n");
ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_SETU_P2P_DONE);
GNUNET_MQ_send (op->mq, ev);
/* We now wait until we get a DONE message back
* and then wait for our MQ to be flushed and all our
* demands be delivered. */
break;
}
if (1 == side)
{
struct IBF_Key unsalted_key;
unsalt_key (&key,
op->salt_receive,
&unsalted_key);
send_offers_for_key (op,
unsalted_key);
}
else if (-1 == side)
{
struct GNUNET_MQ_Envelope *ev;
struct InquiryMessage *msg;
/* It may be nice to merge multiple requests, but with CADET's corking it is not worth
* the effort additional complexity. */
ev = GNUNET_MQ_msg_extra (msg,
sizeof(struct IBF_Key),
GNUNET_MESSAGE_TYPE_SETU_P2P_INQUIRY);
msg->salt = htonl (op->salt_receive);
GNUNET_memcpy (&msg[1],
&key,
sizeof(struct IBF_Key));
LOG (GNUNET_ERROR_TYPE_DEBUG,
"sending element inquiry for IBF key %lx\n",
(unsigned long) key.key_val);
GNUNET_MQ_send (op->mq, ev);
}
else
{
GNUNET_assert (0);
}
}
ibf_destroy (diff_ibf);
return GNUNET_OK;
}
/**
* Check an IBF message from a remote peer.
*
* Reassemble the IBF from multiple pieces, and
* process the whole IBF once possible.
*
* @param cls the union operation
* @param msg the header of the message
* @return #GNUNET_OK if @a msg is well-formed
*/
static int
check_union_p2p_ibf (void *cls,
const struct IBFMessage *msg)
{
struct Operation *op = cls;
unsigned int buckets_in_message;
buckets_in_message = (ntohs (msg->header.size) - sizeof *msg)
/ IBF_BUCKET_SIZE;
if (0 == buckets_in_message)
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
if ((ntohs (msg->header.size) - sizeof *msg) != buckets_in_message
* IBF_BUCKET_SIZE)
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
if (op->phase == PHASE_EXPECT_IBF_LAST)
{
if (ntohl (msg->offset) != op->ibf_buckets_received)
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
if (1 << msg->order != op->remote_ibf->size)
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
if (ntohl (msg->salt) != op->salt_receive)
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
}
else if ((op->phase != PHASE_PASSIVE_DECODING) &&
(op->phase != PHASE_EXPECT_IBF))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
return GNUNET_OK;
}
/**
* Handle an IBF message from a remote peer.
*
* Reassemble the IBF from multiple pieces, and
* process the whole IBF once possible.
*
* @param cls the union operation
* @param msg the header of the message
*/
static void
handle_union_p2p_ibf (void *cls,
const struct IBFMessage *msg)
{
struct Operation *op = cls;
unsigned int buckets_in_message;
buckets_in_message = (ntohs (msg->header.size) - sizeof *msg)
/ IBF_BUCKET_SIZE;
if ((op->phase == PHASE_PASSIVE_DECODING) ||
(op->phase == PHASE_EXPECT_IBF))
{
op->phase = PHASE_EXPECT_IBF_LAST;
GNUNET_assert (NULL == op->remote_ibf);
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Creating new ibf of size %u\n",
1 << msg->order);
op->remote_ibf = ibf_create (1 << msg->order, SE_IBF_HASH_NUM);
op->salt_receive = ntohl (msg->salt);
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Receiving new IBF with salt %u\n",
op->salt_receive);
if (NULL == op->remote_ibf)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Failed to parse remote IBF, closing connection\n");
fail_union_operation (op);
return;
}
op->ibf_buckets_received = 0;
if (0 != ntohl (msg->offset))
{
GNUNET_break_op (0);
fail_union_operation (op);
return;
}
}
else
{
GNUNET_assert (op->phase == PHASE_EXPECT_IBF_LAST);
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Received more of IBF\n");
}
GNUNET_assert (NULL != op->remote_ibf);
ibf_read_slice (&msg[1],
op->ibf_buckets_received,
buckets_in_message,
op->remote_ibf);
op->ibf_buckets_received += buckets_in_message;
if (op->ibf_buckets_received == op->remote_ibf->size)
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
"received full ibf\n");
op->phase = PHASE_ACTIVE_DECODING;
if (GNUNET_OK !=
decode_and_send (op))
{
/* Internal error, best we can do is shut down */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Failed to decode IBF, closing connection\n");
fail_union_operation (op);
return;
}
}
GNUNET_CADET_receive_done (op->channel);
}
/**
* Send a result message to the client indicating
* that there is a new element.
*
* @param op union operation
* @param element element to send
* @param status status to send with the new element
*/
static void
send_client_element (struct Operation *op,
const struct GNUNET_SETU_Element *element,
enum GNUNET_SETU_Status status)
{
struct GNUNET_MQ_Envelope *ev;
struct GNUNET_SETU_ResultMessage *rm;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"sending element (size %u) to client\n",
element->size);
GNUNET_assert (0 != op->client_request_id);
ev = GNUNET_MQ_msg_extra (rm,
element->size,
GNUNET_MESSAGE_TYPE_SETU_RESULT);
if (NULL == ev)
{
GNUNET_MQ_discard (ev);
GNUNET_break (0);
return;
}
rm->result_status = htons (status);
rm->request_id = htonl (op->client_request_id);
rm->element_type = htons (element->element_type);
rm->current_size = GNUNET_htonll (GNUNET_CONTAINER_multihashmap32_size (
op->key_to_element));
GNUNET_memcpy (&rm[1],
element->data,
element->size);
GNUNET_MQ_send (op->set->cs->mq,
ev);
}
/**
* Tests if the operation is finished, and if so notify.
*
* @param op operation to check
*/
static void
maybe_finish (struct Operation *op)
{
unsigned int num_demanded;
num_demanded = GNUNET_CONTAINER_multihashmap_size (
op->demanded_hashes);
if (PHASE_FINISH_WAITING == op->phase)
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
"In PHASE_FINISH_WAITING, pending %u demands\n",
num_demanded);
if (0 == num_demanded)
{
struct GNUNET_MQ_Envelope *ev;
op->phase = PHASE_FINISHED;
ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_SETU_P2P_DONE);
GNUNET_MQ_send (op->mq,
ev);
/* We now wait until the other peer sends P2P_OVER
* after it got all elements from us. */
}
}
if (PHASE_FINISH_CLOSING == op->phase)
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
"In PHASE_FINISH_CLOSING, pending %u demands\n",
num_demanded);
if (0 == num_demanded)
{
op->phase = PHASE_FINISHED;
send_client_done (op);
_GSS_operation_destroy2 (op);
}
}
}
/**
* Check an element message from a remote peer.
*
* @param cls the union operation
* @param emsg the message
*/
static int
check_union_p2p_elements (void *cls,
const struct GNUNET_SETU_ElementMessage *emsg)
{
struct Operation *op = cls;
if (0 == GNUNET_CONTAINER_multihashmap_size (op->demanded_hashes))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
return GNUNET_OK;
}
/**
* Handle an element message from a remote peer.
* Sent by the other peer either because we decoded an IBF and placed a demand,
* or because the other peer switched to full set transmission.
*
* @param cls the union operation
* @param emsg the message
*/
static void
handle_union_p2p_elements (void *cls,
const struct GNUNET_SETU_ElementMessage *emsg)
{
struct Operation *op = cls;
struct ElementEntry *ee;
struct KeyEntry *ke;
uint16_t element_size;
element_size = ntohs (emsg->header.size) - sizeof(struct
GNUNET_SETU_ElementMessage);
ee = GNUNET_malloc (sizeof(struct ElementEntry) + element_size);
GNUNET_memcpy (&ee[1],
&emsg[1],
element_size);
ee->element.size = element_size;
ee->element.data = &ee[1];
ee->element.element_type = ntohs (emsg->element_type);
ee->remote = GNUNET_YES;
GNUNET_SETU_element_hash (&ee->element,
&ee->element_hash);
if (GNUNET_NO ==
GNUNET_CONTAINER_multihashmap_remove (op->demanded_hashes,
&ee->element_hash,
NULL))
{
/* We got something we didn't demand, since it's not in our map. */
GNUNET_break_op (0);
fail_union_operation (op);
return;
}
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Got element (size %u, hash %s) from peer\n",
(unsigned int) element_size,
GNUNET_h2s (&ee->element_hash));
GNUNET_STATISTICS_update (_GSS_statistics,
"# received elements",
1,
GNUNET_NO);
GNUNET_STATISTICS_update (_GSS_statistics,
"# exchanged elements",
1,
GNUNET_NO);
op->received_total++;
ke = op_get_element (op,
&ee->element_hash);
if (NULL != ke)
{
/* Got repeated element. Should not happen since
* we track demands. */
GNUNET_STATISTICS_update (_GSS_statistics,
"# repeated elements",
1,
GNUNET_NO);
ke->received = GNUNET_YES;
GNUNET_free (ee);
}
else
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Registering new element from remote peer\n");
op->received_fresh++;
op_register_element (op, ee, GNUNET_YES);
/* only send results immediately if the client wants it */
send_client_element (op,
&ee->element,
GNUNET_SETU_STATUS_ADD_LOCAL);
}
if ((op->received_total > 8) &&
(op->received_fresh < op->received_total / 3))
{
/* The other peer gave us lots of old elements, there's something wrong. */
GNUNET_break_op (0);
fail_union_operation (op);
return;
}
GNUNET_CADET_receive_done (op->channel);
maybe_finish (op);
}
/**
* Check a full element message from a remote peer.
*
* @param cls the union operation
* @param emsg the message
*/
static int
check_union_p2p_full_element (void *cls,
const struct GNUNET_SETU_ElementMessage *emsg)
{
struct Operation *op = cls;
(void) op;
// FIXME: check that we expect full elements here?
return GNUNET_OK;
}
/**
* Handle an element message from a remote peer.
*
* @param cls the union operation
* @param emsg the message
*/
static void
handle_union_p2p_full_element (void *cls,
const struct GNUNET_SETU_ElementMessage *emsg)
{
struct Operation *op = cls;
struct ElementEntry *ee;
struct KeyEntry *ke;
uint16_t element_size;
/* Allow only receiving of full element message if in expect IBF or in PHASE_FULL_RECEIVING state */
if ( (PHASE_EXPECT_IBF != op->phase) &&
(PHASE_FULL_RECEIVING != op->phase) )
{
GNUNET_break_op (0);
fail_union_operation (op);
return;
}
op->phase = PHASE_FULL_RECEIVING;
element_size = ntohs (emsg->header.size)
- sizeof(struct GNUNET_SETU_ElementMessage);
ee = GNUNET_malloc (sizeof(struct ElementEntry) + element_size);
GNUNET_memcpy (&ee[1], &emsg[1], element_size);
ee->element.size = element_size;
ee->element.data = &ee[1];
ee->element.element_type = ntohs (emsg->element_type);
ee->remote = GNUNET_YES;
GNUNET_SETU_element_hash (&ee->element,
&ee->element_hash);
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Got element (full diff, size %u, hash %s) from peer\n",
(unsigned int) element_size,
GNUNET_h2s (&ee->element_hash));
GNUNET_STATISTICS_update (_GSS_statistics,
"# received elements",
1,
GNUNET_NO);
GNUNET_STATISTICS_update (_GSS_statistics,
"# exchanged elements",
1,
GNUNET_NO);
op->received_total++;
ke = op_get_element (op,
&ee->element_hash);
if (NULL != ke)
{
/* Got repeated element. Should not happen since
* we track demands. */
GNUNET_STATISTICS_update (_GSS_statistics,
"# repeated elements",
1,
GNUNET_NO);
ke->received = GNUNET_YES;
GNUNET_free (ee);
}
else
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Registering new element from remote peer\n");
op->received_fresh++;
op_register_element (op, ee, GNUNET_YES);
/* only send results immediately if the client wants it */
send_client_element (op,
&ee->element,
GNUNET_SETU_STATUS_ADD_LOCAL);
}
if ((GNUNET_YES == op->byzantine) &&
(op->received_total > 384 + op->received_fresh * 4) &&
(op->received_fresh < op->received_total / 6))
{
/* The other peer gave us lots of old elements, there's something wrong. */
LOG (GNUNET_ERROR_TYPE_ERROR,
"Other peer sent only %llu/%llu fresh elements, failing operation\n",
(unsigned long long) op->received_fresh,
(unsigned long long) op->received_total);
GNUNET_break_op (0);
fail_union_operation (op);
return;
}
GNUNET_CADET_receive_done (op->channel);
}
/**
* Send offers (for GNUNET_Hash-es) in response
* to inquiries (for IBF_Key-s).
*
* @param cls the union operation
* @param msg the message
*/
static int
check_union_p2p_inquiry (void *cls,
const struct InquiryMessage *msg)
{
struct Operation *op = cls;
unsigned int num_keys;
if (op->phase != PHASE_PASSIVE_DECODING)
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
num_keys = (ntohs (msg->header.size) - sizeof(struct InquiryMessage))
/ sizeof(struct IBF_Key);
if ((ntohs (msg->header.size) - sizeof(struct InquiryMessage))
!= num_keys * sizeof(struct IBF_Key))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
return GNUNET_OK;
}
/**
* Send offers (for GNUNET_Hash-es) in response to inquiries (for IBF_Key-s).
*
* @param cls the union operation
* @param msg the message
*/
static void
handle_union_p2p_inquiry (void *cls,
const struct InquiryMessage *msg)
{
struct Operation *op = cls;
const struct IBF_Key *ibf_key;
unsigned int num_keys;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Received union inquiry\n");
num_keys = (ntohs (msg->header.size) - sizeof(struct InquiryMessage))
/ sizeof(struct IBF_Key);
ibf_key = (const struct IBF_Key *) &msg[1];
while (0 != num_keys--)
{
struct IBF_Key unsalted_key;
unsalt_key (ibf_key,
ntohl (msg->salt),
&unsalted_key);
send_offers_for_key (op,
unsalted_key);
ibf_key++;
}
GNUNET_CADET_receive_done (op->channel);
}
/**
* Iterator over hash map entries, called to destroy the linked list of
* colliding ibf key entries.
*
* @param cls closure
* @param key current key code
* @param value value in the hash map
* @return #GNUNET_YES if we should continue to iterate,
* #GNUNET_NO if not.
*/
static int
send_missing_full_elements_iter (void *cls,
uint32_t key,
void *value)
{
struct Operation *op = cls;
struct KeyEntry *ke = value;
struct GNUNET_MQ_Envelope *ev;
struct GNUNET_SETU_ElementMessage *emsg;
struct ElementEntry *ee = ke->element;
if (GNUNET_YES == ke->received)
return GNUNET_YES;
ev = GNUNET_MQ_msg_extra (emsg,
ee->element.size,
GNUNET_MESSAGE_TYPE_SETU_P2P_FULL_ELEMENT);
GNUNET_memcpy (&emsg[1],
ee->element.data,
ee->element.size);
emsg->element_type = htons (ee->element.element_type);
GNUNET_MQ_send (op->mq,
ev);
return GNUNET_YES;
}
/**
* Handle a request for full set transmission.
*
* @parem cls closure, a set union operation
* @param mh the demand message
*/
static void
handle_union_p2p_request_full (void *cls,
const struct GNUNET_MessageHeader *mh)
{
struct Operation *op = cls;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Received request for full set transmission\n");
if (PHASE_EXPECT_IBF != op->phase)
{
GNUNET_break_op (0);
fail_union_operation (op);
return;
}
// FIXME: we need to check that our set is larger than the
// byzantine_lower_bound by some threshold
send_full_set (op);
GNUNET_CADET_receive_done (op->channel);
}
/**
* Handle a "full done" message.
*
* @parem cls closure, a set union operation
* @param mh the demand message
*/
static void
handle_union_p2p_full_done (void *cls,
const struct GNUNET_MessageHeader *mh)
{
struct Operation *op = cls;
switch (op->phase)
{
case PHASE_EXPECT_IBF:
{
struct GNUNET_MQ_Envelope *ev;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"got FULL DONE, sending elements that other peer is missing\n");
/* send all the elements that did not come from the remote peer */
GNUNET_CONTAINER_multihashmap32_iterate (op->key_to_element,
&send_missing_full_elements_iter,
op);
ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_SETU_P2P_FULL_DONE);
GNUNET_MQ_send (op->mq,
ev);
op->phase = PHASE_FINISHED;
/* we now wait until the other peer sends us the OVER message*/
}
break;
case PHASE_FULL_SENDING:
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
"got FULL DONE, finishing\n");
/* We sent the full set, and got the response for that. We're done. */
op->phase = PHASE_FINISHED;
GNUNET_CADET_receive_done (op->channel);
send_client_done (op);
_GSS_operation_destroy2 (op);
return;
}
break;
default:
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Handle full done phase is %u\n",
(unsigned) op->phase);
GNUNET_break_op (0);
fail_union_operation (op);
return;
}
GNUNET_CADET_receive_done (op->channel);
}
/**
* Check a demand by the other peer for elements based on a list
* of `struct GNUNET_HashCode`s.
*
* @parem cls closure, a set union operation
* @param mh the demand message
* @return #GNUNET_OK if @a mh is well-formed
*/
static int
check_union_p2p_demand (void *cls,
const struct GNUNET_MessageHeader *mh)
{
struct Operation *op = cls;
unsigned int num_hashes;
(void) op;
num_hashes = (ntohs (mh->size) - sizeof(struct GNUNET_MessageHeader))
/ sizeof(struct GNUNET_HashCode);
if ((ntohs (mh->size) - sizeof(struct GNUNET_MessageHeader))
!= num_hashes * sizeof(struct GNUNET_HashCode))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
return GNUNET_OK;
}
/**
* Handle a demand by the other peer for elements based on a list
* of `struct GNUNET_HashCode`s.
*
* @parem cls closure, a set union operation
* @param mh the demand message
*/
static void
handle_union_p2p_demand (void *cls,
const struct GNUNET_MessageHeader *mh)
{
struct Operation *op = cls;
struct ElementEntry *ee;
struct GNUNET_SETU_ElementMessage *emsg;
const struct GNUNET_HashCode *hash;
unsigned int num_hashes;
struct GNUNET_MQ_Envelope *ev;
num_hashes = (ntohs (mh->size) - sizeof(struct GNUNET_MessageHeader))
/ sizeof(struct GNUNET_HashCode);
for (hash = (const struct GNUNET_HashCode *) &mh[1];
num_hashes > 0;
hash++, num_hashes--)
{
ee = GNUNET_CONTAINER_multihashmap_get (op->set->content->elements,
hash);
if (NULL == ee)
{
/* Demand for non-existing element. */
GNUNET_break_op (0);
fail_union_operation (op);
return;
}
if (GNUNET_NO == _GSS_is_element_of_operation (ee, op))
{
/* Probably confused lazily copied sets. */
GNUNET_break_op (0);
fail_union_operation (op);
return;
}
ev = GNUNET_MQ_msg_extra (emsg,
ee->element.size,
GNUNET_MESSAGE_TYPE_SETU_P2P_ELEMENTS);
GNUNET_memcpy (&emsg[1],
ee->element.data,
ee->element.size);
emsg->reserved = htons (0);
emsg->element_type = htons (ee->element.element_type);
LOG (GNUNET_ERROR_TYPE_DEBUG,
"[OP %p] Sending demanded element (size %u, hash %s) to peer\n",
op,
(unsigned int) ee->element.size,
GNUNET_h2s (&ee->element_hash));
GNUNET_MQ_send (op->mq, ev);
GNUNET_STATISTICS_update (_GSS_statistics,
"# exchanged elements",
1,
GNUNET_NO);
if (op->symmetric)
send_client_element (op,
&ee->element,
GNUNET_SET_STATUS_ADD_REMOTE);
}
GNUNET_CADET_receive_done (op->channel);
}
/**
* Check offer (of `struct GNUNET_HashCode`s).
*
* @param cls the union operation
* @param mh the message
* @return #GNUNET_OK if @a mh is well-formed
*/
static int
check_union_p2p_offer (void *cls,
const struct GNUNET_MessageHeader *mh)
{
struct Operation *op = cls;
unsigned int num_hashes;
/* look up elements and send them */
if ((op->phase != PHASE_PASSIVE_DECODING) &&
(op->phase != PHASE_ACTIVE_DECODING))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
num_hashes = (ntohs (mh->size) - sizeof(struct GNUNET_MessageHeader))
/ sizeof(struct GNUNET_HashCode);
if ((ntohs (mh->size) - sizeof(struct GNUNET_MessageHeader)) !=
num_hashes * sizeof(struct GNUNET_HashCode))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
return GNUNET_OK;
}
/**
* Handle offers (of `struct GNUNET_HashCode`s) and
* respond with demands (of `struct GNUNET_HashCode`s).
*
* @param cls the union operation
* @param mh the message
*/
static void
handle_union_p2p_offer (void *cls,
const struct GNUNET_MessageHeader *mh)
{
struct Operation *op = cls;
const struct GNUNET_HashCode *hash;
unsigned int num_hashes;
num_hashes = (ntohs (mh->size) - sizeof(struct GNUNET_MessageHeader))
/ sizeof(struct GNUNET_HashCode);
for (hash = (const struct GNUNET_HashCode *) &mh[1];
num_hashes > 0;
hash++, num_hashes--)
{
struct ElementEntry *ee;
struct GNUNET_MessageHeader *demands;
struct GNUNET_MQ_Envelope *ev;
ee = GNUNET_CONTAINER_multihashmap_get (op->set->content->elements,
hash);
if (NULL != ee)
if (GNUNET_YES == _GSS_is_element_of_operation (ee, op))
continue;
if (GNUNET_YES ==
GNUNET_CONTAINER_multihashmap_contains (op->demanded_hashes,
hash))
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Skipped sending duplicate demand\n");
continue;
}
GNUNET_assert (GNUNET_OK ==
GNUNET_CONTAINER_multihashmap_put (
op->demanded_hashes,
hash,
NULL,
GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
LOG (GNUNET_ERROR_TYPE_DEBUG,
"[OP %p] Requesting element (hash %s)\n",
op, GNUNET_h2s (hash));
ev = GNUNET_MQ_msg_header_extra (demands,
sizeof(struct GNUNET_HashCode),
GNUNET_MESSAGE_TYPE_SETU_P2P_DEMAND);
GNUNET_memcpy (&demands[1],
hash,
sizeof(struct GNUNET_HashCode));
GNUNET_MQ_send (op->mq, ev);
}
GNUNET_CADET_receive_done (op->channel);
}
/**
* Handle a done message from a remote peer
*
* @param cls the union operation
* @param mh the message
*/
static void
handle_union_p2p_done (void *cls,
const struct GNUNET_MessageHeader *mh)
{
struct Operation *op = cls;
switch (op->phase)
{
case PHASE_PASSIVE_DECODING:
/* We got all requests, but still have to send our elements in response. */
op->phase = PHASE_FINISH_WAITING;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"got DONE (as passive partner), waiting for our demands to be satisfied\n");
/* The active peer is done sending offers
* and inquiries. This means that all
* our responses to that (demands and offers)
* must be in flight (queued or in mesh).
*
* We should notify the active peer once
* all our demands are satisfied, so that the active
* peer can quit if we gave it everything.
*/GNUNET_CADET_receive_done (op->channel);
maybe_finish (op);
return;
case PHASE_ACTIVE_DECODING:
LOG (GNUNET_ERROR_TYPE_DEBUG,
"got DONE (as active partner), waiting to finish\n");
/* All demands of the other peer are satisfied,
* and we processed all offers, thus we know
* exactly what our demands must be.
*
* We'll close the channel
* to the other peer once our demands are met.
*/op->phase = PHASE_FINISH_CLOSING;
GNUNET_CADET_receive_done (op->channel);
maybe_finish (op);
return;
default:
GNUNET_break_op (0);
fail_union_operation (op);
return;
}
}
/**
* Handle a over message from a remote peer
*
* @param cls the union operation
* @param mh the message
*/
static void
handle_union_p2p_over (void *cls,
const struct GNUNET_MessageHeader *mh)
{
send_client_done (cls);
}
/**
* Get the incoming socket associated with the given id.
*
* @param listener the listener to look in
* @param id id to look for
* @return the incoming socket associated with the id,
* or NULL if there is none
*/
static struct Operation *
get_incoming (uint32_t id)
{
for (struct Listener *listener = listener_head;
NULL != listener;
listener = listener->next)
{
for (struct Operation *op = listener->op_head;
NULL != op;
op = op->next)
if (op->suggest_id == id)
return op;
}
return NULL;
}
/**
* Callback called when a client connects to the service.
*
* @param cls closure for the service
* @param c the new client that connected to the service
* @param mq the message queue used to send messages to the client
* @return @a `struct ClientState`
*/
static void *
client_connect_cb (void *cls,
struct GNUNET_SERVICE_Client *c,
struct GNUNET_MQ_Handle *mq)
{
struct ClientState *cs;
num_clients++;
cs = GNUNET_new (struct ClientState);
cs->client = c;
cs->mq = mq;
return cs;
}
/**
* Iterator over hash map entries to free element entries.
*
* @param cls closure
* @param key current key code
* @param value a `struct ElementEntry *` to be free'd
* @return #GNUNET_YES (continue to iterate)
*/
static int
destroy_elements_iterator (void *cls,
const struct GNUNET_HashCode *key,
void *value)
{
struct ElementEntry *ee = value;
GNUNET_free (ee);
return GNUNET_YES;
}
/**
* Clean up after a client has disconnected
*
* @param cls closure, unused
* @param client the client to clean up after
* @param internal_cls the `struct ClientState`
*/
static void
client_disconnect_cb (void *cls,
struct GNUNET_SERVICE_Client *client,
void *internal_cls)
{
struct ClientState *cs = internal_cls;
struct Operation *op;
struct Listener *listener;
struct Set *set;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Client disconnected, cleaning up\n");
if (NULL != (set = cs->set))
{
struct SetContent *content = set->content;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Destroying client's set\n");
/* Destroy pending set operations */
while (NULL != set->ops_head)
_GSS_operation_destroy (set->ops_head);
/* Destroy operation-specific state */
if (NULL != set->se)
{
strata_estimator_destroy (set->se);
set->se = NULL;
}
/* free set content (or at least decrement RC) */
set->content = NULL;
GNUNET_assert (0 != content->refcount);
content->refcount--;
if (0 == content->refcount)
{
GNUNET_assert (NULL != content->elements);
GNUNET_CONTAINER_multihashmap_iterate (content->elements,
&destroy_elements_iterator,
NULL);
GNUNET_CONTAINER_multihashmap_destroy (content->elements);
content->elements = NULL;
GNUNET_free (content);
}
GNUNET_free (set);
}
if (NULL != (listener = cs->listener))
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Destroying client's listener\n");
GNUNET_CADET_close_port (listener->open_port);
listener->open_port = NULL;
while (NULL != (op = listener->op_head))
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Destroying incoming operation `%u' from peer `%s'\n",
(unsigned int) op->client_request_id,
GNUNET_i2s (&op->peer));
incoming_destroy (op);
}
GNUNET_CONTAINER_DLL_remove (listener_head,
listener_tail,
listener);
GNUNET_free (listener);
}
GNUNET_free (cs);
num_clients--;
if ( (GNUNET_YES == in_shutdown) &&
(0 == num_clients) )
{
if (NULL != cadet)
{
GNUNET_CADET_disconnect (cadet);
cadet = NULL;
}
}
}
/**
* Check a request for a set operation from another peer.
*
* @param cls the operation state
* @param msg the received message
* @return #GNUNET_OK if the channel should be kept alive,
* #GNUNET_SYSERR to destroy the channel
*/
static int
check_incoming_msg (void *cls,
const struct OperationRequestMessage *msg)
{
struct Operation *op = cls;
struct Listener *listener = op->listener;
const struct GNUNET_MessageHeader *nested_context;
/* double operation request */
if (0 != op->suggest_id)
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
/* This should be equivalent to the previous condition, but can't hurt to check twice */
if (NULL == listener)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
nested_context = GNUNET_MQ_extract_nested_mh (msg);
if ((NULL != nested_context) &&
(ntohs (nested_context->size) > GNUNET_SETU_CONTEXT_MESSAGE_MAX_SIZE))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
return GNUNET_OK;
}
/**
* Handle a request for a set operation from another peer. Checks if we
* have a listener waiting for such a request (and in that case initiates
* asking the listener about accepting the connection). If no listener
* is waiting, we queue the operation request in hope that a listener
* shows up soon (before timeout).
*
* This msg is expected as the first and only msg handled through the
* non-operation bound virtual table, acceptance of this operation replaces
* our virtual table and subsequent msgs would be routed differently (as
* we then know what type of operation this is).
*
* @param cls the operation state
* @param msg the received message
*/
static void
handle_incoming_msg (void *cls,
const struct OperationRequestMessage *msg)
{
struct Operation *op = cls;
struct Listener *listener = op->listener;
const struct GNUNET_MessageHeader *nested_context;
struct GNUNET_MQ_Envelope *env;
struct GNUNET_SETU_RequestMessage *cmsg;
nested_context = GNUNET_MQ_extract_nested_mh (msg);
/* Make a copy of the nested_context (application-specific context
information that is opaque to set) so we can pass it to the
listener later on */
if (NULL != nested_context)
op->context_msg = GNUNET_copy_message (nested_context);
op->remote_element_count = ntohl (msg->element_count);
GNUNET_log (
GNUNET_ERROR_TYPE_DEBUG,
"Received P2P operation request (port %s) for active listener\n",
GNUNET_h2s (&op->listener->app_id));
GNUNET_assert (0 == op->suggest_id);
if (0 == suggest_id)
suggest_id++;
op->suggest_id = suggest_id++;
GNUNET_assert (NULL != op->timeout_task);
GNUNET_SCHEDULER_cancel (op->timeout_task);
op->timeout_task = NULL;
env = GNUNET_MQ_msg_nested_mh (cmsg,
GNUNET_MESSAGE_TYPE_SETU_REQUEST,
op->context_msg);
GNUNET_log (
GNUNET_ERROR_TYPE_DEBUG,
"Suggesting incoming request with accept id %u to listener %p of client %p\n",
op->suggest_id,
listener,
listener->cs);
cmsg->accept_id = htonl (op->suggest_id);
cmsg->peer_id = op->peer;
GNUNET_MQ_send (listener->cs->mq,
env);
/* NOTE: GNUNET_CADET_receive_done() will be called in
#handle_client_accept() */
}
/**
* Called when a client wants to create a new set. This is typically
* the first request from a client, and includes the type of set
* operation to be performed.
*
* @param cls client that sent the message
* @param m message sent by the client
*/
static void
handle_client_create_set (void *cls,
const struct GNUNET_SETU_CreateMessage *msg)
{
struct ClientState *cs = cls;
struct Set *set;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Client created new set for union operation\n");
if (NULL != cs->set)
{
/* There can only be one set per client */
GNUNET_break (0);
GNUNET_SERVICE_client_drop (cs->client);
return;
}
set = GNUNET_new (struct Set);
{
struct StrataEstimator *se;
se = strata_estimator_create (SE_STRATA_COUNT,
SE_IBF_SIZE,
SE_IBF_HASH_NUM);
if (NULL == se)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Failed to allocate strata estimator\n");
GNUNET_free (set);
GNUNET_SERVICE_client_drop (cs->client);
return;
}
set->se = se;
}
set->content = GNUNET_new (struct SetContent);
set->content->refcount = 1;
set->content->elements = GNUNET_CONTAINER_multihashmap_create (1,
GNUNET_YES);
set->cs = cs;
cs->set = set;
GNUNET_SERVICE_client_continue (cs->client);
}
/**
* Timeout happens iff:
* - we suggested an operation to our listener,
* but did not receive a response in time
* - we got the channel from a peer but no #GNUNET_MESSAGE_TYPE_SETU_P2P_OPERATION_REQUEST
*
* @param cls channel context
* @param tc context information (why was this task triggered now)
*/
static void
incoming_timeout_cb (void *cls)
{
struct Operation *op = cls;
op->timeout_task = NULL;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Remote peer's incoming request timed out\n");
incoming_destroy (op);
}
/**
* Method called whenever another peer has added us to a channel the
* other peer initiated. Only called (once) upon reception of data
* from a channel we listen on.
*
* The channel context represents the operation itself and gets added
* to a DLL, from where it gets looked up when our local listener
* client responds to a proposed/suggested operation or connects and
* associates with this operation.
*
* @param cls closure
* @param channel new handle to the channel
* @param source peer that started the channel
* @return initial channel context for the channel
* returns NULL on error
*/
static void *
channel_new_cb (void *cls,
struct GNUNET_CADET_Channel *channel,
const struct GNUNET_PeerIdentity *source)
{
struct Listener *listener = cls;
struct Operation *op;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"New incoming channel\n");
op = GNUNET_new (struct Operation);
op->listener = listener;
op->peer = *source;
op->channel = channel;
op->mq = GNUNET_CADET_get_mq (op->channel);
op->salt = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
UINT32_MAX);
op->timeout_task = GNUNET_SCHEDULER_add_delayed (INCOMING_CHANNEL_TIMEOUT,
&incoming_timeout_cb,
op);
GNUNET_CONTAINER_DLL_insert (listener->op_head,
listener->op_tail,
op);
return op;
}
/**
* Function called whenever a channel is destroyed. Should clean up
* any associated state. It must NOT call
* GNUNET_CADET_channel_destroy() on the channel.
*
* The peer_disconnect function is part of a a virtual table set initially either
* when a peer creates a new channel with us, or once we create
* a new channel ourselves (evaluate).
*
* Once we know the exact type of operation (union/intersection), the vt is
* replaced with an operation specific instance (_GSS_[op]_vt).
*
* @param channel_ctx place where local state associated
* with the channel is stored
* @param channel connection to the other end (henceforth invalid)
*/
static void
channel_end_cb (void *channel_ctx,
const struct GNUNET_CADET_Channel *channel)
{
struct Operation *op = channel_ctx;
op->channel = NULL;
_GSS_operation_destroy2 (op);
}
/**
* Function called whenever an MQ-channel's transmission window size changes.
*
* The first callback in an outgoing channel will be with a non-zero value
* and will mean the channel is connected to the destination.
*
* For an incoming channel it will be called immediately after the
* #GNUNET_CADET_ConnectEventHandler, also with a non-zero value.
*
* @param cls Channel closure.
* @param channel Connection to the other end (henceforth invalid).
* @param window_size New window size. If the is more messages than buffer size
* this value will be negative..
*/
static void
channel_window_cb (void *cls,
const struct GNUNET_CADET_Channel *channel,
int window_size)
{
/* FIXME: not implemented, we could do flow control here... */
}
/**
* Called when a client wants to create a new listener.
*
* @param cls client that sent the message
* @param msg message sent by the client
*/
static void
handle_client_listen (void *cls,
const struct GNUNET_SETU_ListenMessage *msg)
{
struct ClientState *cs = cls;
struct GNUNET_MQ_MessageHandler cadet_handlers[] = {
GNUNET_MQ_hd_var_size (incoming_msg,
GNUNET_MESSAGE_TYPE_SETU_P2P_OPERATION_REQUEST,
struct OperationRequestMessage,
NULL),
GNUNET_MQ_hd_var_size (union_p2p_ibf,
GNUNET_MESSAGE_TYPE_SETU_P2P_IBF,
struct IBFMessage,
NULL),
GNUNET_MQ_hd_var_size (union_p2p_elements,
GNUNET_MESSAGE_TYPE_SETU_P2P_ELEMENTS,
struct GNUNET_SETU_ElementMessage,
NULL),
GNUNET_MQ_hd_var_size (union_p2p_offer,
GNUNET_MESSAGE_TYPE_SETU_P2P_OFFER,
struct GNUNET_MessageHeader,
NULL),
GNUNET_MQ_hd_var_size (union_p2p_inquiry,
GNUNET_MESSAGE_TYPE_SETU_P2P_INQUIRY,
struct InquiryMessage,
NULL),
GNUNET_MQ_hd_var_size (union_p2p_demand,
GNUNET_MESSAGE_TYPE_SETU_P2P_DEMAND,
struct GNUNET_MessageHeader,
NULL),
GNUNET_MQ_hd_fixed_size (union_p2p_done,
GNUNET_MESSAGE_TYPE_SETU_P2P_DONE,
struct GNUNET_MessageHeader,
NULL),
GNUNET_MQ_hd_fixed_size (union_p2p_over,
GNUNET_MESSAGE_TYPE_SETU_P2P_OVER,
struct GNUNET_MessageHeader,
NULL),
GNUNET_MQ_hd_fixed_size (union_p2p_full_done,
GNUNET_MESSAGE_TYPE_SETU_P2P_FULL_DONE,
struct GNUNET_MessageHeader,
NULL),
GNUNET_MQ_hd_fixed_size (union_p2p_request_full,
GNUNET_MESSAGE_TYPE_SETU_P2P_REQUEST_FULL,
struct GNUNET_MessageHeader,
NULL),
GNUNET_MQ_hd_var_size (union_p2p_strata_estimator,
GNUNET_MESSAGE_TYPE_SETU_P2P_SE,
struct StrataEstimatorMessage,
NULL),
GNUNET_MQ_hd_var_size (union_p2p_strata_estimator,
GNUNET_MESSAGE_TYPE_SETU_P2P_SEC,
struct StrataEstimatorMessage,
NULL),
GNUNET_MQ_hd_var_size (union_p2p_full_element,
GNUNET_MESSAGE_TYPE_SETU_P2P_FULL_ELEMENT,
struct GNUNET_SETU_ElementMessage,
NULL),
GNUNET_MQ_handler_end ()
};
struct Listener *listener;
if (NULL != cs->listener)
{
/* max. one active listener per client! */
GNUNET_break (0);
GNUNET_SERVICE_client_drop (cs->client);
return;
}
listener = GNUNET_new (struct Listener);
listener->cs = cs;
cs->listener = listener;
listener->app_id = msg->app_id;
GNUNET_CONTAINER_DLL_insert (listener_head,
listener_tail,
listener);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"New listener created (port %s)\n",
GNUNET_h2s (&listener->app_id));
listener->open_port = GNUNET_CADET_open_port (cadet,
&msg->app_id,
&channel_new_cb,
listener,
&channel_window_cb,
&channel_end_cb,
cadet_handlers);
GNUNET_SERVICE_client_continue (cs->client);
}
/**
* Called when the listening client rejects an operation
* request by another peer.
*
* @param cls client that sent the message
* @param msg message sent by the client
*/
static void
handle_client_reject (void *cls,
const struct GNUNET_SETU_RejectMessage *msg)
{
struct ClientState *cs = cls;
struct Operation *op;
op = get_incoming (ntohl (msg->accept_reject_id));
if (NULL == op)
{
/* no matching incoming operation for this reject;
could be that the other peer already disconnected... */
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Client rejected unknown operation %u\n",
(unsigned int) ntohl (msg->accept_reject_id));
GNUNET_SERVICE_client_continue (cs->client);
return;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Peer request (app %s) rejected by client\n",
GNUNET_h2s (&cs->listener->app_id));
_GSS_operation_destroy2 (op);
GNUNET_SERVICE_client_continue (cs->client);
}
/**
* Called when a client wants to add or remove an element to a set it inhabits.
*
* @param cls client that sent the message
* @param msg message sent by the client
*/
static int
check_client_set_add (void *cls,
const struct GNUNET_SETU_ElementMessage *msg)
{
/* NOTE: Technically, we should probably check with the
block library whether the element we are given is well-formed */
return GNUNET_OK;
}
/**
* Called when a client wants to add or remove an element to a set it inhabits.
*
* @param cls client that sent the message
* @param msg message sent by the client
*/
static void
handle_client_set_add (void *cls,
const struct GNUNET_SETU_ElementMessage *msg)
{
struct ClientState *cs = cls;
struct Set *set;
struct GNUNET_SETU_Element el;
struct ElementEntry *ee;
struct GNUNET_HashCode hash;
if (NULL == (set = cs->set))
{
/* client without a set requested an operation */
GNUNET_break (0);
GNUNET_SERVICE_client_drop (cs->client);
return;
}
GNUNET_SERVICE_client_continue (cs->client);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Executing mutation on set\n");
el.size = ntohs (msg->header.size) - sizeof(*msg);
el.data = &msg[1];
el.element_type = ntohs (msg->element_type);
GNUNET_SETU_element_hash (&el,
&hash);
ee = GNUNET_CONTAINER_multihashmap_get (set->content->elements,
&hash);
if (NULL == ee)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Client inserts element %s of size %u\n",
GNUNET_h2s (&hash),
el.size);
ee = GNUNET_malloc (el.size + sizeof(*ee));
ee->element.size = el.size;
GNUNET_memcpy (&ee[1], el.data, el.size);
ee->element.data = &ee[1];
ee->element.element_type = el.element_type;
ee->remote = GNUNET_NO;
ee->generation = set->current_generation;
ee->element_hash = hash;
GNUNET_break (GNUNET_YES ==
GNUNET_CONTAINER_multihashmap_put (
set->content->elements,
&ee->element_hash,
ee,
GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
}
else
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Client inserted element %s of size %u twice (ignored)\n",
GNUNET_h2s (&hash),
el.size);
/* same element inserted twice */
return;
}
strata_estimator_insert (set->se,
get_ibf_key (&ee->element_hash));
}
/**
* Advance the current generation of a set,
* adding exclusion ranges if necessary.
*
* @param set the set where we want to advance the generation
*/
static void
advance_generation (struct Set *set)
{
set->content->latest_generation++;
set->current_generation++;
}
/**
* Called when a client wants to initiate a set operation with another
* peer. Initiates the CADET connection to the listener and sends the
* request.
*
* @param cls client that sent the message
* @param msg message sent by the client
* @return #GNUNET_OK if the message is well-formed
*/
static int
check_client_evaluate (void *cls,
const struct GNUNET_SETU_EvaluateMessage *msg)
{
/* FIXME: suboptimal, even if the context below could be NULL,
there are malformed messages this does not check for... */
return GNUNET_OK;
}
/**
* Called when a client wants to initiate a set operation with another
* peer. Initiates the CADET connection to the listener and sends the
* request.
*
* @param cls client that sent the message
* @param msg message sent by the client
*/
static void
handle_client_evaluate (void *cls,
const struct GNUNET_SETU_EvaluateMessage *msg)
{
struct ClientState *cs = cls;
struct Operation *op = GNUNET_new (struct Operation);
const struct GNUNET_MQ_MessageHandler cadet_handlers[] = {
GNUNET_MQ_hd_var_size (incoming_msg,
GNUNET_MESSAGE_TYPE_SETU_P2P_OPERATION_REQUEST,
struct OperationRequestMessage,
op),
GNUNET_MQ_hd_var_size (union_p2p_ibf,
GNUNET_MESSAGE_TYPE_SETU_P2P_IBF,
struct IBFMessage,
op),
GNUNET_MQ_hd_var_size (union_p2p_elements,
GNUNET_MESSAGE_TYPE_SETU_P2P_ELEMENTS,
struct GNUNET_SETU_ElementMessage,
op),
GNUNET_MQ_hd_var_size (union_p2p_offer,
GNUNET_MESSAGE_TYPE_SETU_P2P_OFFER,
struct GNUNET_MessageHeader,
op),
GNUNET_MQ_hd_var_size (union_p2p_inquiry,
GNUNET_MESSAGE_TYPE_SETU_P2P_INQUIRY,
struct InquiryMessage,
op),
GNUNET_MQ_hd_var_size (union_p2p_demand,
GNUNET_MESSAGE_TYPE_SETU_P2P_DEMAND,
struct GNUNET_MessageHeader,
op),
GNUNET_MQ_hd_fixed_size (union_p2p_done,
GNUNET_MESSAGE_TYPE_SETU_P2P_DONE,
struct GNUNET_MessageHeader,
op),
GNUNET_MQ_hd_fixed_size (union_p2p_over,
GNUNET_MESSAGE_TYPE_SETU_P2P_OVER,
struct GNUNET_MessageHeader,
op),
GNUNET_MQ_hd_fixed_size (union_p2p_full_done,
GNUNET_MESSAGE_TYPE_SETU_P2P_FULL_DONE,
struct GNUNET_MessageHeader,
op),
GNUNET_MQ_hd_fixed_size (union_p2p_request_full,
GNUNET_MESSAGE_TYPE_SETU_P2P_REQUEST_FULL,
struct GNUNET_MessageHeader,
op),
GNUNET_MQ_hd_var_size (union_p2p_strata_estimator,
GNUNET_MESSAGE_TYPE_SETU_P2P_SE,
struct StrataEstimatorMessage,
op),
GNUNET_MQ_hd_var_size (union_p2p_strata_estimator,
GNUNET_MESSAGE_TYPE_SETU_P2P_SEC,
struct StrataEstimatorMessage,
op),
GNUNET_MQ_hd_var_size (union_p2p_full_element,
GNUNET_MESSAGE_TYPE_SETU_P2P_FULL_ELEMENT,
struct GNUNET_SETU_ElementMessage,
op),
GNUNET_MQ_handler_end ()
};
struct Set *set;
const struct GNUNET_MessageHeader *context;
if (NULL == (set = cs->set))
{
GNUNET_break (0);
GNUNET_free (op);
GNUNET_SERVICE_client_drop (cs->client);
return;
}
op->salt = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
UINT32_MAX);
op->peer = msg->target_peer;
op->client_request_id = ntohl (msg->request_id);
op->byzantine = msg->byzantine;
op->byzantine_lower_bound = ntohl (msg->byzantine_lower_bound);
op->force_full = msg->force_full;
op->force_delta = msg->force_delta;
op->symmetric = msg->symmetric;
context = GNUNET_MQ_extract_nested_mh (msg);
/* Advance generation values, so that
mutations won't interfer with the running operation. */
op->set = set;
op->generation_created = set->current_generation;
advance_generation (set);
GNUNET_CONTAINER_DLL_insert (set->ops_head,
set->ops_tail,
op);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Creating new CADET channel to port %s for set union\n",
GNUNET_h2s (&msg->app_id));
op->channel = GNUNET_CADET_channel_create (cadet,
op,
&msg->target_peer,
&msg->app_id,
&channel_window_cb,
&channel_end_cb,
cadet_handlers);
op->mq = GNUNET_CADET_get_mq (op->channel);
{
struct GNUNET_MQ_Envelope *ev;
struct OperationRequestMessage *msg;
ev = GNUNET_MQ_msg_nested_mh (msg,
GNUNET_MESSAGE_TYPE_SETU_P2P_OPERATION_REQUEST,
context);
if (NULL == ev)
{
/* the context message is too large */
GNUNET_break (0);
GNUNET_SERVICE_client_drop (cs->client);
return;
}
op->demanded_hashes = GNUNET_CONTAINER_multihashmap_create (32,
GNUNET_NO);
/* copy the current generation's strata estimator for this operation */
op->se = strata_estimator_dup (op->set->se);
/* we started the operation, thus we have to send the operation request */
op->phase = PHASE_EXPECT_SE;
op->salt_receive = op->salt_send = 42; // FIXME?????
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Initiating union operation evaluation\n");
GNUNET_STATISTICS_update (_GSS_statistics,
"# of total union operations",
1,
GNUNET_NO);
GNUNET_STATISTICS_update (_GSS_statistics,
"# of initiated union operations",
1,
GNUNET_NO);
GNUNET_MQ_send (op->mq,
ev);
if (NULL != context)
LOG (GNUNET_ERROR_TYPE_DEBUG,
"sent op request with context message\n");
else
LOG (GNUNET_ERROR_TYPE_DEBUG,
"sent op request without context message\n");
initialize_key_to_element (op);
op->initial_size = GNUNET_CONTAINER_multihashmap32_size (
op->key_to_element);
}
GNUNET_SERVICE_client_continue (cs->client);
}
/**
* Handle a request from the client to cancel a running set operation.
*
* @param cls the client
* @param msg the message
*/
static void
handle_client_cancel (void *cls,
const struct GNUNET_SETU_CancelMessage *msg)
{
struct ClientState *cs = cls;
struct Set *set;
struct Operation *op;
int found;
if (NULL == (set = cs->set))
{
/* client without a set requested an operation */
GNUNET_break (0);
GNUNET_SERVICE_client_drop (cs->client);
return;
}
found = GNUNET_NO;
for (op = set->ops_head; NULL != op; op = op->next)
{
if (op->client_request_id == ntohl (msg->request_id))
{
found = GNUNET_YES;
break;
}
}
if (GNUNET_NO == found)
{
/* It may happen that the operation was already destroyed due to
* the other peer disconnecting. The client may not know about this
* yet and try to cancel the (just barely non-existent) operation.
* So this is not a hard error.
*///
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Client canceled non-existent op %u\n",
(uint32_t) ntohl (msg->request_id));
}
else
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Client requested cancel for op %u\n",
(uint32_t) ntohl (msg->request_id));
_GSS_operation_destroy (op);
}
GNUNET_SERVICE_client_continue (cs->client);
}
/**
* Handle a request from the client to accept a set operation that
* came from a remote peer. We forward the accept to the associated
* operation for handling
*
* @param cls the client
* @param msg the message
*/
static void
handle_client_accept (void *cls,
const struct GNUNET_SETU_AcceptMessage *msg)
{
struct ClientState *cs = cls;
struct Set *set;
struct Operation *op;
struct GNUNET_SETU_ResultMessage *result_message;
struct GNUNET_MQ_Envelope *ev;
struct Listener *listener;
if (NULL == (set = cs->set))
{
/* client without a set requested to accept */
GNUNET_break (0);
GNUNET_SERVICE_client_drop (cs->client);
return;
}
op = get_incoming (ntohl (msg->accept_reject_id));
if (NULL == op)
{
/* It is not an error if the set op does not exist -- it may
* have been destroyed when the partner peer disconnected. */
GNUNET_log (
GNUNET_ERROR_TYPE_INFO,
"Client %p accepted request %u of listener %p that is no longer active\n",
cs,
ntohl (msg->accept_reject_id),
cs->listener);
ev = GNUNET_MQ_msg (result_message,
GNUNET_MESSAGE_TYPE_SETU_RESULT);
result_message->request_id = msg->request_id;
result_message->result_status = htons (GNUNET_SETU_STATUS_FAILURE);
GNUNET_MQ_send (set->cs->mq, ev);
GNUNET_SERVICE_client_continue (cs->client);
return;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Client accepting request %u\n",
(uint32_t) ntohl (msg->accept_reject_id));
listener = op->listener;
op->listener = NULL;
GNUNET_CONTAINER_DLL_remove (listener->op_head,
listener->op_tail,
op);
op->set = set;
GNUNET_CONTAINER_DLL_insert (set->ops_head,
set->ops_tail,
op);
op->client_request_id = ntohl (msg->request_id);
op->byzantine = msg->byzantine;
op->byzantine_lower_bound = ntohl (msg->byzantine_lower_bound);
op->force_full = msg->force_full;
op->force_delta = msg->force_delta;
op->symmetric = msg->symmetric;
/* Advance generation values, so that future mutations do not
interfer with the running operation. */
op->generation_created = set->current_generation;
advance_generation (set);
GNUNET_assert (NULL == op->se);
LOG (GNUNET_ERROR_TYPE_DEBUG,
"accepting set union operation\n");
GNUNET_STATISTICS_update (_GSS_statistics,
"# of accepted union operations",
1,
GNUNET_NO);
GNUNET_STATISTICS_update (_GSS_statistics,
"# of total union operations",
1,
GNUNET_NO);
{
const struct StrataEstimator *se;
struct GNUNET_MQ_Envelope *ev;
struct StrataEstimatorMessage *strata_msg;
char *buf;
size_t len;
uint16_t type;
op->se = strata_estimator_dup (op->set->se);
op->demanded_hashes = GNUNET_CONTAINER_multihashmap_create (32,
GNUNET_NO);
op->salt_receive = op->salt_send = 42; // FIXME?????
initialize_key_to_element (op);
op->initial_size = GNUNET_CONTAINER_multihashmap32_size (
op->key_to_element);
/* kick off the operation */
se = op->se;
buf = GNUNET_malloc (se->strata_count * IBF_BUCKET_SIZE * se->ibf_size);
len = strata_estimator_write (se,
buf);
if (len < se->strata_count * IBF_BUCKET_SIZE * se->ibf_size)
type = GNUNET_MESSAGE_TYPE_SETU_P2P_SEC;
else
type = GNUNET_MESSAGE_TYPE_SETU_P2P_SE;
ev = GNUNET_MQ_msg_extra (strata_msg,
len,
type);
GNUNET_memcpy (&strata_msg[1],
buf,
len);
GNUNET_free (buf);
strata_msg->set_size
= GNUNET_htonll (GNUNET_CONTAINER_multihashmap_size (
op->set->content->elements));
GNUNET_MQ_send (op->mq,
ev);
op->phase = PHASE_EXPECT_IBF;
}
/* Now allow CADET to continue, as we did not do this in
#handle_incoming_msg (as we wanted to first see if the
local client would accept the request). */
GNUNET_CADET_receive_done (op->channel);
GNUNET_SERVICE_client_continue (cs->client);
}
/**
* Called to clean up, after a shutdown has been requested.
*
* @param cls closure, NULL
*/
static void
shutdown_task (void *cls)
{
/* Delay actual shutdown to allow service to disconnect clients */
in_shutdown = GNUNET_YES;
if (0 == num_clients)
{
if (NULL != cadet)
{
GNUNET_CADET_disconnect (cadet);
cadet = NULL;
}
}
GNUNET_STATISTICS_destroy (_GSS_statistics,
GNUNET_YES);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"handled shutdown request\n");
}
/**
* Function called by the service's run
* method to run service-specific setup code.
*
* @param cls closure
* @param cfg configuration to use
* @param service the initialized service
*/
static void
run (void *cls,
const struct GNUNET_CONFIGURATION_Handle *cfg,
struct GNUNET_SERVICE_Handle *service)
{
/* FIXME: need to modify SERVICE (!) API to allow
us to run a shutdown task *after* clients were
forcefully disconnected! */
GNUNET_SCHEDULER_add_shutdown (&shutdown_task,
NULL);
_GSS_statistics = GNUNET_STATISTICS_create ("setu",
cfg);
cadet = GNUNET_CADET_connect (cfg);
if (NULL == cadet)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_ ("Could not connect to CADET service\n"));
GNUNET_SCHEDULER_shutdown ();
return;
}
}
/**
* Define "main" method using service macro.
*/
GNUNET_SERVICE_MAIN (
"set",
GNUNET_SERVICE_OPTION_NONE,
&run,
&client_connect_cb,
&client_disconnect_cb,
NULL,
GNUNET_MQ_hd_fixed_size (client_accept,
GNUNET_MESSAGE_TYPE_SETU_ACCEPT,
struct GNUNET_SETU_AcceptMessage,
NULL),
GNUNET_MQ_hd_var_size (client_set_add,
GNUNET_MESSAGE_TYPE_SETU_ADD,
struct GNUNET_SETU_ElementMessage,
NULL),
GNUNET_MQ_hd_fixed_size (client_create_set,
GNUNET_MESSAGE_TYPE_SETU_CREATE,
struct GNUNET_SETU_CreateMessage,
NULL),
GNUNET_MQ_hd_var_size (client_evaluate,
GNUNET_MESSAGE_TYPE_SETU_EVALUATE,
struct GNUNET_SETU_EvaluateMessage,
NULL),
GNUNET_MQ_hd_fixed_size (client_listen,
GNUNET_MESSAGE_TYPE_SETU_LISTEN,
struct GNUNET_SETU_ListenMessage,
NULL),
GNUNET_MQ_hd_fixed_size (client_reject,
GNUNET_MESSAGE_TYPE_SETU_REJECT,
struct GNUNET_SETU_RejectMessage,
NULL),
GNUNET_MQ_hd_fixed_size (client_cancel,
GNUNET_MESSAGE_TYPE_SETU_CANCEL,
struct GNUNET_SETU_CancelMessage,
NULL),
GNUNET_MQ_handler_end ());
/* end of gnunet-service-setu.c */