/**
* Iterate over routing table and remove entries with value as part of any trail.
*
* @param cls closure
* @param key current public key
* @param value value in the hash map
* @return #GNUNET_YES if we should continue to iterate,
* #GNUNET_NO if not.
*/
static int
remove_matching_trails (void *cls,
const struct GNUNET_HashCode *key,
void *value)
{
struct RoutingTrail *remove_trail = value;
struct GNUNET_PeerIdentity *disconnected_peer = cls;
struct GNUNET_HashCode trail_id = *key;
struct GNUNET_PeerIdentity my_identity;
/* If disconnected_peer is next_hop, then send a trail teardown message through
* prev_hop in direction from destination to source. */
if (0 == GNUNET_CRYPTO_cmp_peer_identity (&remove_trail->next_hop,
disconnected_peer))
{
my_identity = *GDS_NEIGHBOURS_get_id ();
if (0 != GNUNET_CRYPTO_cmp_peer_identity (&my_identity,
&remove_trail->prev_hop))
{
GDS_NEIGHBOURS_send_trail_teardown (&trail_id,
GDS_ROUTING_DEST_TO_SRC,
&remove_trail->prev_hop);
}
}
/* If disconnected_peer is prev_hop, then send a trail teardown through
* next_hop in direction from Source to Destination. */
if (0 == GNUNET_CRYPTO_cmp_peer_identity (&remove_trail->prev_hop,
disconnected_peer))
{
my_identity = *GDS_NEIGHBOURS_get_id ();
if (0 != GNUNET_CRYPTO_cmp_peer_identity (&my_identity,
&remove_trail->next_hop))
{
GDS_NEIGHBOURS_send_trail_teardown (&trail_id,
GDS_ROUTING_SRC_TO_DEST,
&remove_trail->next_hop);
}
}
GNUNET_assert (GNUNET_YES ==
GNUNET_CONTAINER_multihashmap_remove (routing_table,
&trail_id,
remove_trail));
GNUNET_free (remove_trail);
return GNUNET_YES;
}
/**
* TEST FUNCTION
* Remove after using.
*/
void
GDS_ROUTING_test_print (void)
{
struct GNUNET_CONTAINER_MultiHashMapIterator *iter;
struct RoutingTrail *trail;
struct GNUNET_PeerIdentity print_peer;
struct GNUNET_HashCode key_ret;
int i;
struct GNUNET_PeerIdentity my_identity = *GDS_NEIGHBOURS_get_id();
print_peer = my_identity;
FPRINTF (stderr,_("\nSUPU ***PRINTING ROUTING TABLE ***** of =%s"),GNUNET_i2s(&print_peer));
iter =GNUNET_CONTAINER_multihashmap_iterator_create (routing_table);
for (i = 0; i < GNUNET_CONTAINER_multihashmap_size(routing_table); i++)
{
if(GNUNET_YES == GNUNET_CONTAINER_multihashmap_iterator_next (iter,
&key_ret,
(const void **)&trail))
{
FPRINTF (stderr,_("\nSUPU %s, %s, %d, trail->trail_id = %s"),
__FILE__, __func__,__LINE__, GNUNET_h2s(&trail->trail_id));
GNUNET_memcpy (&print_peer, &trail->next_hop, sizeof (struct GNUNET_PeerIdentity));
FPRINTF (stderr,_("\nSUPU %s, %s, %d, trail->next_hop = %s"),
__FILE__, __func__,__LINE__, GNUNET_i2s(&print_peer));
GNUNET_memcpy (&print_peer, &trail->prev_hop, sizeof (struct GNUNET_PeerIdentity));
FPRINTF (stderr,_("\nSUPU %s, %s, %d, trail->prev_hop = %s"),
__FILE__, __func__,__LINE__, GNUNET_i2s(&print_peer));
}
}
}
/**
* Handler for DHT GET messages from the client.
*
* @param cls closure for the service
* @param client the client we received this message from
* @param message the actual message received
*/
static void
handle_dht_local_get (void *cls, struct GNUNET_SERVER_Client *client,
const struct GNUNET_MessageHeader *message)
{
const struct GNUNET_DHT_ClientGetMessage *get;
struct ClientQueryRecord *cqr;
size_t xquery_size;
const char *xquery;
uint16_t size;
size = ntohs (message->size);
if (size < sizeof (struct GNUNET_DHT_ClientGetMessage))
{
GNUNET_break (0);
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
xquery_size = size - sizeof (struct GNUNET_DHT_ClientGetMessage);
get = (const struct GNUNET_DHT_ClientGetMessage *) message;
xquery = (const char *) &get[1];
GNUNET_STATISTICS_update (GDS_stats,
gettext_noop
("# GET requests received from clients"), 1,
GNUNET_NO);
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Received GET request for %s from local client %p, xq: %.*s\n",
GNUNET_h2s (&get->key), client, xquery_size, xquery);
LOG_TRAFFIC (GNUNET_ERROR_TYPE_DEBUG, "XDHT CLIENT-GET %s @ %u\n",
GNUNET_h2s (&get->key), getpid ());
cqr = GNUNET_malloc (sizeof (struct ClientQueryRecord) + xquery_size);
cqr->key = get->key;
cqr->client = find_active_client (client);
cqr->xquery = (void *) &cqr[1];
memcpy (&cqr[1], xquery, xquery_size);
cqr->hnode = GNUNET_CONTAINER_heap_insert (retry_heap, cqr, 0);
cqr->retry_frequency = GNUNET_TIME_UNIT_SECONDS;
cqr->retry_time = GNUNET_TIME_absolute_get ();
cqr->unique_id = get->unique_id;
cqr->xquery_size = xquery_size;
cqr->replication = ntohl (get->desired_replication_level);
cqr->msg_options = ntohl (get->options);
cqr->type = ntohl (get->type);
// FIXME use cqr->key, set multihashmap create to GNUNET_YES
GNUNET_CONTAINER_multihashmap_put (forward_map, &get->key, cqr,
GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
GDS_CLIENTS_process_get (ntohl (get->options),
ntohl (get->type),
0,
ntohl (get->desired_replication_level),
1,
GDS_NEIGHBOURS_get_id(),
&get->key);
/* start remote requests */
if (GNUNET_SCHEDULER_NO_TASK != retry_task)
GNUNET_SCHEDULER_cancel (retry_task);
retry_task = GNUNET_SCHEDULER_add_now (&transmit_next_request_task, NULL);
/* perform local lookup */
GDS_DATACACHE_handle_get (&get->key, cqr->type, cqr->xquery, xquery_size,
NULL, 0);
GNUNET_SERVER_receive_done (client, GNUNET_OK);
}
/**
* Handler for PUT messages.
*
* @param cls closure for the service
* @param client the client we received this message from
* @param message the actual message received
*/
static void
handle_dht_local_put (void *cls, struct GNUNET_SERVER_Client *client,
const struct GNUNET_MessageHeader *message)
{
const struct GNUNET_DHT_ClientPutMessage *dht_msg;
struct GNUNET_CONTAINER_BloomFilter *peer_bf;
uint16_t size;
struct PendingMessage *pm;
struct GNUNET_DHT_ClientPutConfirmationMessage *conf;
size = ntohs (message->size);
if (size < sizeof (struct GNUNET_DHT_ClientPutMessage))
{
GNUNET_break (0);
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
GNUNET_STATISTICS_update (GDS_stats,
gettext_noop
("# PUT requests received from clients"), 1,
GNUNET_NO);
dht_msg = (const struct GNUNET_DHT_ClientPutMessage *) message;
LOG_TRAFFIC (GNUNET_ERROR_TYPE_DEBUG, "XDHT CLIENT-PUT %s @ %u\n",
GNUNET_h2s (&dht_msg->key), getpid ());
/* give to local clients */
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Handling local PUT of %u-bytes for query %s\n",
size - sizeof (struct GNUNET_DHT_ClientPutMessage),
GNUNET_h2s (&dht_msg->key));
GDS_CLIENTS_handle_reply (GNUNET_TIME_absolute_ntoh (dht_msg->expiration),
&dht_msg->key, 0, NULL, 0, NULL,
ntohl (dht_msg->type),
size - sizeof (struct GNUNET_DHT_ClientPutMessage),
&dht_msg[1]);
/* store locally */
GDS_DATACACHE_handle_put (GNUNET_TIME_absolute_ntoh (dht_msg->expiration),
&dht_msg->key, 0, NULL, ntohl (dht_msg->type),
size - sizeof (struct GNUNET_DHT_ClientPutMessage),
&dht_msg[1]);
/* route to other peers */
peer_bf =
GNUNET_CONTAINER_bloomfilter_init (NULL, DHT_BLOOM_SIZE,
GNUNET_CONSTANTS_BLOOMFILTER_K);
GDS_NEIGHBOURS_handle_put (ntohl (dht_msg->type), ntohl (dht_msg->options),
ntohl (dht_msg->desired_replication_level),
GNUNET_TIME_absolute_ntoh (dht_msg->expiration),
0 /* hop count */ ,
peer_bf, &dht_msg->key, 0, NULL, &dht_msg[1],
size -
sizeof (struct GNUNET_DHT_ClientPutMessage));
GDS_CLIENTS_process_put (ntohl (dht_msg->options),
ntohl (dht_msg->type),
0,
ntohl (dht_msg->desired_replication_level),
1,
GDS_NEIGHBOURS_get_id(),
GNUNET_TIME_absolute_ntoh (dht_msg->expiration),
&dht_msg->key,
&dht_msg[1],
size - sizeof (struct GNUNET_DHT_ClientPutMessage));
GNUNET_CONTAINER_bloomfilter_free (peer_bf);
pm = GNUNET_malloc (sizeof (struct PendingMessage) +
sizeof (struct GNUNET_DHT_ClientPutConfirmationMessage));
conf = (struct GNUNET_DHT_ClientPutConfirmationMessage *) &pm[1];
conf->header.size = htons (sizeof (struct GNUNET_DHT_ClientPutConfirmationMessage));
conf->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_CLIENT_PUT_OK);
conf->reserved = htonl (0);
conf->unique_id = dht_msg->unique_id;
pm->msg = &conf->header;
add_pending_message (find_active_client (client), pm);
GNUNET_SERVER_receive_done (client, GNUNET_OK);
}