void
udp_broadcast_receive (struct Plugin *plugin, const char * buf, ssize_t size, struct sockaddr *addr, size_t addrlen)
{
struct GNUNET_ATS_Information ats;
if ((GNUNET_YES == plugin->broadcast_ipv4) && (addrlen == sizeof (struct sockaddr_in)))
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Received IPv4 HELLO beacon broadcast with %i bytes from address %s\n",
size, GNUNET_a2s ((const struct sockaddr *) addr, addrlen));
struct Mstv4Context *mc;
mc = GNUNET_malloc (sizeof (struct Mstv4Context));
struct sockaddr_in *av4 = (struct sockaddr_in *) addr;
mc->addr.ipv4_addr = av4->sin_addr.s_addr;
mc->addr.u4_port = av4->sin_port;
ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) addr, addrlen);
mc->ats_address_network_type = ats.value;
GNUNET_assert (NULL != plugin->broadcast_ipv4_mst);
if (GNUNET_OK !=
GNUNET_SERVER_mst_receive (plugin->broadcast_ipv4_mst, mc, buf, size,
GNUNET_NO, GNUNET_NO))
GNUNET_free (mc);
}
else if ((GNUNET_YES == plugin->broadcast_ipv4) && (addrlen == sizeof (struct sockaddr_in6)))
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Received IPv6 HELLO beacon broadcast with %i bytes from address %s\n",
size, GNUNET_a2s ((const struct sockaddr *) &addr, addrlen));
struct Mstv6Context *mc;
mc = GNUNET_malloc (sizeof (struct Mstv6Context));
struct sockaddr_in6 *av6 = (struct sockaddr_in6 *) addr;
mc->addr.ipv6_addr = av6->sin6_addr;
mc->addr.u6_port = av6->sin6_port;
ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) addr, addrlen);
mc->ats_address_network_type = ats.value;
GNUNET_assert (NULL != plugin->broadcast_ipv4_mst);
if (GNUNET_OK !=
GNUNET_SERVER_mst_receive (plugin->broadcast_ipv6_mst, mc, buf, size,
GNUNET_NO, GNUNET_NO))
GNUNET_free (mc);
}
}
/**
* Transmit a message.
*
* @param tmit
* Transmission handle.
* @param method_name
* Which method should be invoked.
* @param env
* Environment for the message.
* Should stay available until the first call to notify_data.
* Can be NULL if there are no modifiers or @a notify_mod is
* provided instead.
* @param notify_mod
* Function to call to obtain modifiers.
* Can be NULL if there are no modifiers or @a env is provided instead.
* @param notify_data
* Function to call to obtain fragments of the data.
* @param notify_cls
* Closure for @a notify_mod and @a notify_data.
* @param flags
* Flags for the message being transmitted.
*
* @return #GNUNET_OK if the transmission was started.
* #GNUNET_SYSERR if another transmission is already going on.
*/
int
GNUNET_PSYC_transmit_message (struct GNUNET_PSYC_TransmitHandle *tmit,
const char *method_name,
const struct GNUNET_ENV_Environment *env,
GNUNET_PSYC_TransmitNotifyModifier notify_mod,
GNUNET_PSYC_TransmitNotifyData notify_data,
void *notify_cls,
uint32_t flags)
{
if (GNUNET_NO != tmit->in_transmit)
return GNUNET_SYSERR;
tmit->in_transmit = GNUNET_YES;
size_t size = strlen (method_name) + 1;
struct GNUNET_PSYC_MessageMethod *pmeth;
tmit->msg = GNUNET_malloc (sizeof (*tmit->msg) + sizeof (*pmeth) + size);
tmit->msg->size = sizeof (*tmit->msg) + sizeof (*pmeth) + size;
if (NULL != notify_mod)
{
tmit->notify_mod = notify_mod;
tmit->notify_mod_cls = notify_cls;
}
else
{
tmit->notify_mod = &transmit_notify_env;
tmit->notify_mod_cls = tmit;
if (NULL != env)
{
struct GNUNET_ENV_Modifier mod = {};
mod.next = GNUNET_ENV_environment_head (env);
tmit->mod = &mod;
struct GNUNET_ENV_Modifier *m = tmit->mod;
while (NULL != (m = m->next))
{
if (m->oper != GNUNET_ENV_OP_SET)
flags |= GNUNET_PSYC_MASTER_TRANSMIT_STATE_MODIFY;
}
}
else
{
tmit->mod = NULL;
}
}
pmeth = (struct GNUNET_PSYC_MessageMethod *) &tmit->msg[1];
pmeth->header.type = htons (GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_METHOD);
pmeth->header.size = htons (sizeof (*pmeth) + size);
pmeth->flags = htonl (flags);
memcpy (&pmeth[1], method_name, size);
tmit->state = GNUNET_PSYC_MESSAGE_STATE_MODIFIER;
tmit->notify_data = notify_data;
tmit->notify_data_cls = notify_cls;
transmit_mod (tmit);
return GNUNET_OK;
}
static struct GNUNET_GNSRECORD_Data *
create_record (int count)
{
unsigned int c;
struct GNUNET_GNSRECORD_Data *rd;
rd = GNUNET_malloc (count * sizeof (struct GNUNET_GNSRECORD_Data));
for (c = 0; c < count; c++)
{
rd[c].expiration_time = GNUNET_TIME_absolute_get().abs_value_us + 1000000000;
rd[c].record_type = TEST_RECORD_TYPE;
rd[c].data_size = TEST_RECORD_DATALEN;
rd[c].data = GNUNET_malloc(TEST_RECORD_DATALEN);
memset ((char *) rd[c].data, TEST_RECORD_DATA, TEST_RECORD_DATALEN);
}
return rd;
}
static struct GNUNET_NAMESTORE_RecordData *
create_record (unsigned int count)
{
unsigned int c;
struct GNUNET_NAMESTORE_RecordData * rd;
rd = GNUNET_malloc (count * sizeof (struct GNUNET_NAMESTORE_RecordData));
for (c = 0; c < count; c++)
{
rd[c].expiration_time = GNUNET_TIME_relative_to_absolute (GNUNET_TIME_UNIT_HOURS).abs_value;
rd[c].record_type = 1111;
rd[c].data_size = 50;
rd[c].data = GNUNET_malloc(50);
memset ((char *) rd[c].data, 'a', 50);
}
return rd;
}
/**
* Main state machine that goes over all options and
* runs the next requested function.
*
* @param cls unused
* @param tc scheduler context
*/
static void
state_machine (void *cls,
const struct GNUNET_SCHEDULER_TaskContext *tc)
{
tt = GNUNET_SCHEDULER_NO_TASK;
if (NULL != put_uri)
{
GPI_plugins_load (cfg);
if (GNUNET_SYSERR == parse_hello_uri (put_uri))
fprintf (stderr,
_("Invalid URI `%s'\n"),
put_uri);
GNUNET_free (put_uri);
put_uri = NULL;
return;
}
if (GNUNET_YES == get_info)
{
get_info = GNUNET_NO;
GPI_plugins_load (cfg);
pic = GNUNET_PEERINFO_iterate (peerinfo, NULL,
TIMEOUT,
&print_peer_info, NULL);
return;
}
if (GNUNET_YES == get_self)
{
struct GNUNET_CRYPTO_HashAsciiEncoded enc;
get_self = GNUNET_NO;
GNUNET_CRYPTO_hash_to_enc (&my_peer_identity.hashPubKey, &enc);
if (be_quiet)
printf ("%s\n", (char *) &enc);
else
printf (_("I am peer `%s'.\n"), (const char *) &enc);
}
if (GNUNET_YES == get_uri)
{
struct GetUriContext *guc;
char *pkey;
guc = GNUNET_malloc (sizeof (struct GetUriContext));
pkey = GNUNET_CRYPTO_rsa_public_key_to_string (&my_public_key);
GNUNET_asprintf (&guc->uri,
"%s%s",
HELLO_URI_PREFIX,
pkey);
GNUNET_free (pkey);
GPI_plugins_load (cfg);
pic = GNUNET_PEERINFO_iterate (peerinfo, &my_peer_identity,
TIMEOUT,
&print_my_uri, guc);
get_uri = GNUNET_NO;
return;
}
GNUNET_SCHEDULER_shutdown ();
}
/**
* Check if some client is monitoring GET messages and notify
* them in that case.
*
* @param options Options, for instance RecordRoute, DemultiplexEverywhere.
* @param type The type of data in the request.
* @param hop_count Hop count so far.
* @param path_length number of entries in path (or 0 if not recorded).
* @param path peers on the GET path (or NULL if not recorded).
* @param desired_replication_level Desired replication level.
* @param key Key of the requested data.
*/
void
GDS_CLIENTS_process_get (uint32_t options,
enum GNUNET_BLOCK_Type type,
uint32_t hop_count,
uint32_t desired_replication_level,
unsigned int path_length,
const struct GNUNET_PeerIdentity *path,
const struct GNUNET_HashCode * key)
{
struct ClientMonitorRecord *m;
struct ClientList **cl;
unsigned int cl_size;
cl = NULL;
cl_size = 0;
for (m = monitor_head; NULL != m; m = m->next)
{
if ((GNUNET_BLOCK_TYPE_ANY == m->type || m->type == type) &&
(NULL == m->key ||
memcmp (key, m->key, sizeof(struct GNUNET_HashCode)) == 0))
{
struct PendingMessage *pm;
struct GNUNET_DHT_MonitorGetMessage *mmsg;
struct GNUNET_PeerIdentity *msg_path;
size_t msize;
unsigned int i;
/* Don't send duplicates */
for (i = 0; i < cl_size; i++)
if (cl[i] == m->client)
break;
if (i < cl_size)
continue;
GNUNET_array_append (cl, cl_size, m->client);
msize = path_length * sizeof (struct GNUNET_PeerIdentity);
msize += sizeof (struct GNUNET_DHT_MonitorGetMessage);
msize += sizeof (struct PendingMessage);
pm = GNUNET_malloc (msize);
mmsg = (struct GNUNET_DHT_MonitorGetMessage *) &pm[1];
pm->msg = &mmsg->header;
mmsg->header.size = htons (msize - sizeof (struct PendingMessage));
mmsg->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_MONITOR_GET);
mmsg->options = htonl(options);
mmsg->type = htonl(type);
mmsg->hop_count = htonl(hop_count);
mmsg->desired_replication_level = htonl(desired_replication_level);
mmsg->get_path_length = htonl(path_length);
memcpy (&mmsg->key, key, sizeof (struct GNUNET_HashCode));
msg_path = (struct GNUNET_PeerIdentity *) &mmsg[1];
if (path_length > 0)
memcpy (msg_path, path,
path_length * sizeof (struct GNUNET_PeerIdentity));
add_pending_message (m->client, pm);
}
}
GNUNET_free_non_null (cl);
}
/**
* Read a share from its binary representation.
*
* @param data Binary representation of the share.
* @param len Length of @a data.
* @param[out] readlen Number of bytes read,
* ignored if NULL.
* @return The share, or NULL on error.
*/
struct GNUNET_SECRETSHARING_Share *
GNUNET_SECRETSHARING_share_read (const void *data,
size_t len,
size_t *readlen)
{
struct GNUNET_SECRETSHARING_Share *share;
const struct GNUNET_SECRETSHARING_ShareHeaderNBO *sh = data;
char *p;
size_t n;
uint16_t payload_size;
payload_size = ntohs (sh->num_peers) *
(sizeof (uint16_t) + sizeof (struct GNUNET_SECRETSHARING_FieldElement) +
sizeof (struct GNUNET_PeerIdentity));
if (NULL != readlen)
*readlen = payload_size + sizeof *sh;
share = GNUNET_malloc (sizeof *share);
share->threshold = ntohs (sh->threshold);
share->num_peers = ntohs (sh->num_peers);
share->my_peer = ntohs (sh->my_peer);
share->my_share = sh->my_share;
share->public_key = sh->public_key;
p = (void *) &sh[1];
n = share->num_peers * sizeof (struct GNUNET_PeerIdentity);
share->peers = GNUNET_malloc (n);
memcpy (share->peers, p, n);
p += n;
n = share->num_peers * sizeof (struct GNUNET_SECRETSHARING_FieldElement);
share->sigmas = GNUNET_malloc (n);
memcpy (share->sigmas, p, n);
p += n;
n = share->num_peers * sizeof (uint16_t);
share->original_indices = GNUNET_malloc (n);
memcpy (share->original_indices, p, n);
return share;
}
/**
* Print information about the peer.
* Currently prints the GNUNET_PeerIdentity and the transport address.
*
* @param cls the 'struct PrintContext'
* @param peer identity of the peer
* @param hello addresses of the peer
* @param err_msg error message
*/
static void
print_peer_info (void *cls, const struct GNUNET_PeerIdentity *peer,
const struct GNUNET_HELLO_Message *hello, const char *err_msg)
{
struct GNUNET_CRYPTO_HashAsciiEncoded enc;
struct PrintContext *pc;
if (NULL == peer)
{
pic = NULL; /* end of iteration */
if (NULL != err_msg)
{
FPRINTF (stderr,
_("Error in communication with PEERINFO service: %s\n"),
err_msg);
}
if (NULL == pc_head)
tt = GNUNET_SCHEDULER_add_now (&state_machine, NULL);
return;
}
if ((GNUNET_YES == be_quiet) || (NULL == hello))
{
GNUNET_CRYPTO_hash_to_enc (&peer->hashPubKey, &enc);
printf ("%s\n", (const char *) &enc);
return;
}
pc = GNUNET_malloc (sizeof (struct PrintContext));
GNUNET_CONTAINER_DLL_insert (pc_head,
pc_tail,
pc);
pc->peer = *peer;
GNUNET_HELLO_iterate_addresses (hello,
GNUNET_NO,
&count_address,
pc);
if (0 == pc->off)
{
dump_pc (pc);
return;
}
pc->address_list_size = pc->off;
pc->address_list = GNUNET_malloc (sizeof (struct AddressRecord) * pc->off);
GNUNET_HELLO_iterate_addresses (hello, GNUNET_NO,
&print_address, pc);
}
/**
* Obtain the location of ".my.cnf".
*
* @param cfg our configuration
* @param section the section
* @return NULL on error
*/
static char *
get_my_cnf_path (const struct GNUNET_CONFIGURATION_Handle *cfg,
const char *section)
{
char *cnffile;
char *home_dir;
struct stat st;
#ifndef WINDOWS
struct passwd *pw;
#endif
int configured;
#ifndef WINDOWS
pw = getpwuid (getuid ());
if (!pw)
{
GNUNET_log_from_strerror (GNUNET_ERROR_TYPE_ERROR, "mysql", "getpwuid");
return NULL;
}
if (GNUNET_YES == GNUNET_CONFIGURATION_have_value (cfg, section, "CONFIG"))
{
GNUNET_assert (GNUNET_OK ==
GNUNET_CONFIGURATION_get_value_filename (cfg, section,
"CONFIG",
&cnffile));
configured = GNUNET_YES;
}
else
{
home_dir = GNUNET_strdup (pw->pw_dir);
GNUNET_asprintf (&cnffile, "%s/.my.cnf", home_dir);
GNUNET_free (home_dir);
configured = GNUNET_NO;
}
#else
home_dir = (char *) GNUNET_malloc (_MAX_PATH + 1);
plibc_conv_to_win_path ("~/", home_dir);
GNUNET_asprintf (&cnffile, "%s/.my.cnf", home_dir);
GNUNET_free (home_dir);
configured = GNUNET_NO;
#endif
GNUNET_log_from (GNUNET_ERROR_TYPE_INFO, "mysql",
_("Trying to use file `%s' for MySQL configuration.\n"),
cnffile);
if ((0 != STAT (cnffile, &st)) || (0 != ACCESS (cnffile, R_OK)) ||
(!S_ISREG (st.st_mode)))
{
if (configured == GNUNET_YES)
GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, "mysql",
_("Could not access file `%s': %s\n"), cnffile,
STRERROR (errno));
GNUNET_free (cnffile);
return NULL;
}
return cnffile;
}
/**
* This function is called *before* the DNS request has been
* given to a "local" DNS resolver. Tunneling for DNS requests
* was enabled, so we now need to send the request via some MESH
* tunnel to a DNS EXIT for resolution.
*
* @param cls closure
* @param rh request handle to user for reply
* @param request_length number of bytes in request
* @param request udp payload of the DNS request
*/
static void
dns_pre_request_handler (void *cls,
struct GNUNET_DNS_RequestHandle *rh,
size_t request_length,
const char *request)
{
struct RequestContext *rc;
size_t mlen;
struct GNUNET_MessageHeader hdr;
struct GNUNET_TUN_DnsHeader dns;
GNUNET_STATISTICS_update (stats,
gettext_noop ("# DNS requests intercepted"),
1, GNUNET_NO);
if (0 == dns_exit_available)
{
GNUNET_STATISTICS_update (stats,
gettext_noop ("# DNS requests dropped (DNS mesh tunnel down)"),
1, GNUNET_NO);
GNUNET_DNS_request_drop (rh);
return;
}
if (request_length < sizeof (dns))
{
GNUNET_STATISTICS_update (stats,
gettext_noop ("# DNS requests dropped (malformed)"),
1, GNUNET_NO);
GNUNET_DNS_request_drop (rh);
return;
}
memcpy (&dns, request, sizeof (dns));
GNUNET_assert (NULL != mesh_tunnel);
mlen = sizeof (struct GNUNET_MessageHeader) + request_length;
rc = GNUNET_malloc (sizeof (struct RequestContext) + mlen);
rc->rh = rh;
rc->mesh_message = (const struct GNUNET_MessageHeader*) &rc[1];
rc->timeout_task = GNUNET_SCHEDULER_add_delayed (TIMEOUT,
&timeout_request,
rc);
rc->dns_id = dns.id;
hdr.type = htons (GNUNET_MESSAGE_TYPE_VPN_DNS_TO_INTERNET);
hdr.size = htons (mlen);
memcpy (&rc[1], &hdr, sizeof (struct GNUNET_MessageHeader));
memcpy (&(((char*)&rc[1])[sizeof (struct GNUNET_MessageHeader)]),
request,
request_length);
GNUNET_CONTAINER_DLL_insert_tail (transmit_queue_head,
transmit_queue_tail,
rc);
if (NULL == mesh_th)
mesh_th = GNUNET_MESH_notify_transmit_ready (mesh_tunnel,
GNUNET_NO, 0,
TIMEOUT,
NULL, mlen,
&transmit_dns_request_to_mesh,
NULL);
}
/**
* Perform a PUT operation storing data in the DHT. FIXME: we should
* change the protocol to get a confirmation for the PUT from the DHT
* and call 'cont' only after getting the confirmation; otherwise, the
* client has no good way of telling if the 'PUT' message actually got
* to the DHT service!
*
* @param handle handle to DHT service
* @param key the key to store under
* @param desired_replication_level estimate of how many
* nearest peers this request should reach
* @param options routing options for this message
* @param type type of the value
* @param size number of bytes in data; must be less than 64k
* @param data the data to store
* @param exp desired expiration time for the value
* @param timeout how long to wait for transmission of this request
* @param cont continuation to call when done (transmitting request to service)
* You must not call #GNUNET_DHT_disconnect in this continuation
* @param cont_cls closure for @a cont
*/
struct GNUNET_DHT_PutHandle *
GNUNET_DHT_put (struct GNUNET_DHT_Handle *handle,
const struct GNUNET_HashCode * key,
uint32_t desired_replication_level,
enum GNUNET_DHT_RouteOption options,
enum GNUNET_BLOCK_Type type, size_t size,
const void *data,
struct GNUNET_TIME_Absolute exp,
struct GNUNET_TIME_Relative timeout,
GNUNET_DHT_PutContinuation cont,
void *cont_cls)
{
struct GNUNET_DHT_ClientPutMessage *put_msg;
size_t msize;
struct PendingMessage *pending;
struct GNUNET_DHT_PutHandle *ph;
msize = sizeof (struct GNUNET_DHT_ClientPutMessage) + size;
if ((msize >= GNUNET_SERVER_MAX_MESSAGE_SIZE) ||
(size >= GNUNET_SERVER_MAX_MESSAGE_SIZE))
{
GNUNET_break (0);
return NULL;
}
ph = GNUNET_new (struct GNUNET_DHT_PutHandle);
ph->dht_handle = handle;
ph->timeout_task = GNUNET_SCHEDULER_add_delayed (timeout, &timeout_put_request, ph);
ph->cont = cont;
ph->cont_cls = cont_cls;
ph->unique_id = ++handle->uid_gen;
pending = GNUNET_malloc (sizeof (struct PendingMessage) + msize);
ph->pending = pending;
put_msg = (struct GNUNET_DHT_ClientPutMessage *) &pending[1];
pending->msg = &put_msg->header;
pending->handle = handle;
pending->cont = &mark_put_message_gone;
pending->cont_cls = ph;
pending->free_on_send = GNUNET_YES;
put_msg->header.size = htons (msize);
put_msg->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_CLIENT_PUT);
put_msg->type = htonl (type);
put_msg->options = htonl ((uint32_t) options);
put_msg->desired_replication_level = htonl (desired_replication_level);
put_msg->unique_id = ph->unique_id;
put_msg->expiration = GNUNET_TIME_absolute_hton (exp);
put_msg->key = *key;
memcpy (&put_msg[1], data, size);
GNUNET_CONTAINER_DLL_insert (handle->pending_head, handle->pending_tail,
pending);
pending->in_pending_queue = GNUNET_YES;
GNUNET_CONTAINER_DLL_insert_tail (handle->put_head,
handle->put_tail,
ph);
process_pending_messages (handle);
return ph;
}
struct Session *
create_session (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
const void *addr, size_t addrlen)
{
struct Session *s = NULL;
GNUNET_assert ((addrlen == sizeof (struct IPv6HttpAddress)) ||
(addrlen == sizeof (struct IPv4HttpAddress)));
s = GNUNET_malloc (sizeof (struct Session));
memcpy (&s->target, target, sizeof (struct GNUNET_PeerIdentity));
s->plugin = plugin;
s->addr = GNUNET_malloc (addrlen);
memcpy (s->addr, addr, addrlen);
s->addrlen = addrlen;
s->ats_address_network_type = htonl (GNUNET_ATS_NET_UNSPECIFIED);
start_session_timeout(s);
return s;
}
static struct GNUNET_NAMESTORE_RecordData *
create_record (int count)
{
int c;
struct GNUNET_NAMESTORE_RecordData * rd;
rd = GNUNET_malloc (count * sizeof (struct GNUNET_NAMESTORE_RecordData));
for (c = 0; c < RECORDS; c++)
{
rd[c].expiration = GNUNET_TIME_absolute_get();
rd[c].record_type = TEST_RECORD_TYPE;
rd[c].data_size = TEST_RECORD_DATALEN;
rd[c].data = GNUNET_malloc(TEST_RECORD_DATALEN);
memset ((char *) rd[c].data, TEST_RECORD_DATA, TEST_RECORD_DATALEN);
}
return rd;
}
/**
* Start or stop a service.
*
* @param h handle to ARM
* @param service_name name of the service
* @param timeout how long to wait before failing for good
* @param cb callback to invoke when service is ready
* @param cb_cls closure for callback
* @param type type of the request
*/
static void
change_service (struct GNUNET_ARM_Handle *h, const char *service_name,
struct GNUNET_TIME_Relative timeout, GNUNET_ARM_ResultCallback cb,
void *cb_cls, uint16_t type)
{
struct ARMControlMessage *cm;
size_t slen;
struct GNUNET_ARM_Message *msg;
slen = strlen (service_name) + 1;
if (slen + sizeof (struct GNUNET_ARM_Message) >=
GNUNET_SERVER_MAX_MESSAGE_SIZE)
{
GNUNET_break (0);
if (cb != NULL)
cb (cb_cls, GNUNET_ARM_REQUEST_TOO_LONG, NULL, 0);
return;
}
LOG (GNUNET_ERROR_TYPE_DEBUG, "Requesting %s of service `%s'.\n",
(GNUNET_MESSAGE_TYPE_ARM_START == type) ? "start" : "termination",
service_name);
cm = GNUNET_malloc (sizeof (struct ARMControlMessage) + slen);
cm->h = h;
cm->result_cont = cb;
cm->cont_cls = cb_cls;
cm->timeout = GNUNET_TIME_relative_to_absolute (timeout);
memcpy (&cm[1], service_name, slen);
msg = GNUNET_malloc (sizeof (struct GNUNET_ARM_Message) + slen);
msg->header.size = htons (sizeof (struct GNUNET_ARM_Message) + slen);
msg->header.type = htons (type);
msg->reserved = htonl (0);
memcpy (&msg[1], service_name, slen);
cm->msg = msg;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Inserting a control message into the queue. Timeout is %s\n",
GNUNET_STRINGS_relative_time_to_string (GNUNET_TIME_absolute_get_remaining (cm->timeout),
GNUNET_NO));
GNUNET_CONTAINER_DLL_insert_tail (h->control_pending_head,
h->control_pending_tail, cm);
cm->timeout_task_id =
GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_absolute_get_remaining
(cm->timeout), &control_message_timeout, cm);
trigger_next_request (h, GNUNET_NO);
}
/**
* Transform topics to regex expression.
*
* @param topic topic of subscription as provided by the subscriber
* @param regex_topic client identification of the client
*/
static void
get_regex (char *topic,
char **regex_topic)
{
char *plus;
char *hash;
char *prefixed_topic;
int i;
int j;
int k;
int plus_counter = 0;
int hash_exists = 0;
plus = strchr(topic,'+');
while (plus != NULL)
{
plus_counter +=1;
plus=strchr(plus+1,'+');
}
hash = strchr(topic,'#');
if (hash != NULL)
{
hash_exists = 1;
}
add_prefix(topic, &prefixed_topic);
*regex_topic = GNUNET_malloc (strlen(prefixed_topic) - plus_counter - hash_exists + plus_counter*strlen(plus_regex) + hash_exists*strlen(hash_regex)+1);
j = 0;
for (i = 0; prefixed_topic[i] != '\0'; i++)
{
if (prefixed_topic[i] == '+')
{
for (k = 0; k<strlen(plus_regex); k++)
{
(*regex_topic)[j] = plus_regex[k];
j++;
}
}
else if (prefixed_topic[i] == '#')
{
j--;
for (k = 0; k<strlen(hash_regex); k++)
{
(*regex_topic)[j] = hash_regex[k];
j++;
}
}
else
{
(*regex_topic)[j] = prefixed_topic[i];
j++;
}
}
(*regex_topic)[j] = '\0';
}
int
EnumNICs2 (INTERFACE_INFO **ifs4, int *ifs4_len, SOCKET_ADDRESS_LIST **ifs6)
{
int result = 0;
SOCKET s4;
SOCKET s6;
int ifs4len = 0;
int ifs6len = 0;
INTERFACE_INFO *interfaces4 = NULL;
SOCKET_ADDRESS_LIST *interfaces6 = NULL;
SetLastError (0);
s4 = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
(void) GetLastError ();
SetLastError (0);
s6 = socket (AF_INET6, SOCK_STREAM, IPPROTO_TCP);
(void) GetLastError ();
if (s6 != INVALID_SOCKET)
{
ifs6len = EnumNICs_IPv6_get_ifs_count (s6);
if (ifs6len > 0)
{
interfaces6 = (SOCKET_ADDRESS_LIST *) GNUNET_malloc (ifs6len);
result = EnumNICs_IPv6_get_ifs (s6, interfaces6, ifs6len) || result;
}
closesocket (s6);
s6 = INVALID_SOCKET;
}
if (s4 != INVALID_SOCKET)
{
result = EnumNICs_IPv4_get_ifs (s4, &interfaces4, &ifs4len) || result;
closesocket (s4);
s4 = INVALID_SOCKET;
}
if (ifs6len + ifs4len == 0)
goto error;
if (!result)
{
*ifs4 = interfaces4;
*ifs4_len = ifs4len;
*ifs6 = interfaces6;
return GNUNET_OK;
}
error:
if (interfaces4 != NULL)
GNUNET_free (interfaces4);
if (interfaces6 != NULL)
GNUNET_free (interfaces6);
if (s4 != INVALID_SOCKET)
closesocket (s4);
if (s6 != INVALID_SOCKET)
closesocket (s6);
return GNUNET_SYSERR;
}
/**
* Connect to the peerinfo service.
*
* @param cfg configuration to use
* @return NULL on error (configuration related, actual connection
* establishment may happen asynchronously).
*/
struct GNUNET_PEERINFO_Handle *
GNUNET_PEERINFO_connect (const struct GNUNET_CONFIGURATION_Handle *cfg)
{
struct GNUNET_PEERINFO_Handle *h;
h = GNUNET_malloc (sizeof (struct GNUNET_PEERINFO_Handle));
h->client = GNUNET_CLIENT_connect ("peerinfo", cfg);
h->cfg = cfg;
return h;
}
/**
* Start a DNS stub resolver.
*
* @param dns_ip target IP address to use
* @return NULL on error
*/
struct GNUNET_DNSSTUB_Context *
GNUNET_DNSSTUB_start (const char *dns_ip)
{
struct GNUNET_DNSSTUB_Context *ctx;
ctx = GNUNET_malloc (sizeof (struct GNUNET_DNSSTUB_Context));
if (NULL != dns_ip)
ctx->dns_exit = GNUNET_strdup (dns_ip);
return ctx;
}
/**
* Initialize the connection with the GNS service.
*
* @param cfg configuration to use
* @return handle to the GNS service, or NULL on error
*/
struct GNUNET_GNS_Handle *
GNUNET_GNS_connect (const struct GNUNET_CONFIGURATION_Handle *cfg)
{
struct GNUNET_GNS_Handle *handle;
handle = GNUNET_malloc (sizeof (struct GNUNET_GNS_Handle));
handle->cfg = cfg;
reconnect (handle);
return handle;
}
/**
* Create a new load value.
*
* @param autodecline speed at which this value should automatically
* decline in the absence of external events; at the given
* frequency, 0-load values will be added to the load
* @return the new load value
*/
struct GNUNET_LOAD_Value *
GNUNET_LOAD_value_init (struct GNUNET_TIME_Relative autodecline)
{
struct GNUNET_LOAD_Value *ret;
ret = GNUNET_malloc (sizeof (struct GNUNET_LOAD_Value));
ret->autodecline = autodecline;
ret->last_update = GNUNET_TIME_absolute_get ();
return ret;
}
/**
* Get an IP address as a string.
*
* @param sa host address
* @param salen length of host address in @a sa
* @param do_resolve use #GNUNET_NO to return numeric hostname
* @param timeout how long to try resolving
* @param callback function to call with hostnames
* last callback is NULL when finished
* @param cls closure for @a callback
* @return handle that can be used to cancel the request
*/
struct GNUNET_RESOLVER_RequestHandle *
GNUNET_RESOLVER_hostname_get (const struct sockaddr *sa,
socklen_t salen,
int do_resolve,
struct GNUNET_TIME_Relative timeout,
GNUNET_RESOLVER_HostnameCallback callback,
void *cls)
{
struct GNUNET_RESOLVER_RequestHandle *rh;
size_t ip_len;
const void *ip;
check_config ();
switch (sa->sa_family)
{
case AF_INET:
GNUNET_assert (salen == sizeof (struct sockaddr_in));
ip_len = sizeof (struct in_addr);
ip = &((const struct sockaddr_in*)sa)->sin_addr;
break;
case AF_INET6:
GNUNET_assert (salen == sizeof (struct sockaddr_in6));
ip_len = sizeof (struct in6_addr);
ip = &((const struct sockaddr_in6*)sa)->sin6_addr;
break;
default:
GNUNET_break (0);
return NULL;
}
rh = GNUNET_malloc (sizeof (struct GNUNET_RESOLVER_RequestHandle) + salen);
rh->name_callback = callback;
rh->cls = cls;
rh->af = sa->sa_family;
rh->timeout = GNUNET_TIME_relative_to_absolute (timeout);
memcpy (&rh[1], ip, ip_len);
rh->data_len = ip_len;
rh->direction = GNUNET_YES;
rh->received_response = GNUNET_NO;
if (GNUNET_NO == do_resolve)
{
rh->task = GNUNET_SCHEDULER_add_now (&numeric_reverse, rh);
return rh;
}
GNUNET_CONTAINER_DLL_insert_tail (req_head,
req_tail,
rh);
rh->was_queued = GNUNET_YES;
if (NULL != s_task)
{
GNUNET_SCHEDULER_cancel (s_task);
s_task = NULL;
}
process_requests ();
return rh;
}
/**
* Recusively update the info about what is the first hop to reach the node
*
* @param tree Tree this nodes belongs to.
* @param parent ID from node form which to start updating.
* @param hop If known, ID of the first hop.
* If not known, NULL to find out and pass on children.
*/
static void
tree_node_update_first_hops (struct MeshTunnelTree *tree,
struct MeshTunnelTreeNode *parent,
struct GNUNET_PeerIdentity *hop)
{
struct GNUNET_PeerIdentity pi;
struct GNUNET_PeerIdentity *copy;
struct GNUNET_PeerIdentity id;
struct MeshTunnelTreeNode *n;
#if MESH_TREE_DEBUG
GNUNET_PEER_resolve (parent->peer, &id);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tree: Finding first hop for %s.\n",
GNUNET_i2s (&id));
#endif
if (NULL == hop)
{
struct MeshTunnelTreeNode *aux;
struct MeshTunnelTreeNode *old;
aux = old = parent;
while (aux != tree->me)
{
#if MESH_TREE_DEBUG
GNUNET_PEER_resolve (aux->peer, &id);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tree: ... checking %s.\n",
GNUNET_i2s (&id));
#endif
old = aux;
aux = aux->parent;
GNUNET_assert (NULL != aux);
}
#if MESH_TREE_DEBUG
GNUNET_PEER_resolve (old->peer, &id);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tree: It's %s!\n",
GNUNET_i2s (&id));
#endif
hop = π
GNUNET_PEER_resolve (old->peer, hop);
}
GNUNET_PEER_resolve (parent->peer, &id);
copy = GNUNET_CONTAINER_multihashmap_get (tree->first_hops, &id.hashPubKey);
if (NULL == copy)
copy = GNUNET_malloc (sizeof (struct GNUNET_PeerIdentity));
*copy = *hop;
(void) GNUNET_CONTAINER_multihashmap_put (tree->first_hops, &id.hashPubKey,
copy,
GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
for (n = parent->children_head; NULL != n; n = n->next)
{
tree_node_update_first_hops (tree, n, hop);
}
}
/**
* Function called to (recursively) add all of the files in the
* directory to the tree. Called by the directory scanner to initiate
* the scan. Does NOT yet add any metadata.
*
* @param filename file or directory to scan
* @param dst where to store the resulting share tree item;
* NULL is stored in 'dst' upon recoverable errors (GNUNET_OK is returned)
* @return GNUNET_OK on success, GNUNET_SYSERR on error
*/
static int
preprocess_file (const char *filename,
struct ScanTreeNode **dst)
{
struct ScanTreeNode *item;
struct stat sbuf;
uint64_t fsize = 0;
if ((0 != STAT (filename, &sbuf)) ||
((!S_ISDIR (sbuf.st_mode)) && (GNUNET_OK != GNUNET_DISK_file_size (
filename, &fsize, GNUNET_NO, GNUNET_YES))))
{
/* If the file doesn't exist (or is not stat-able for any other reason)
skip it (but report it), but do continue. */
if (GNUNET_OK !=
write_message (GNUNET_MESSAGE_TYPE_FS_PUBLISH_HELPER_SKIP_FILE,
filename, strlen (filename) + 1))
return GNUNET_SYSERR;
/* recoverable error, store 'NULL' in *dst */
*dst = NULL;
return GNUNET_OK;
}
/* Report the progress */
if (GNUNET_OK !=
write_message (S_ISDIR (sbuf.st_mode)
? GNUNET_MESSAGE_TYPE_FS_PUBLISH_HELPER_PROGRESS_DIRECTORY
: GNUNET_MESSAGE_TYPE_FS_PUBLISH_HELPER_PROGRESS_FILE,
filename, strlen (filename) + 1))
return GNUNET_SYSERR;
item = GNUNET_malloc (sizeof (struct ScanTreeNode));
item->filename = GNUNET_strdup (filename);
item->is_directory = (S_ISDIR (sbuf.st_mode)) ? GNUNET_YES : GNUNET_NO;
item->file_size = fsize;
if (GNUNET_YES == item->is_directory)
{
struct RecursionContext rc;
rc.parent = item;
rc.stop = GNUNET_NO;
GNUNET_DISK_directory_scan (filename,
&scan_callback,
&rc);
if ( (GNUNET_YES == rc.stop) ||
(GNUNET_OK !=
write_message (GNUNET_MESSAGE_TYPE_FS_PUBLISH_HELPER_PROGRESS_DIRECTORY,
"..", 3)) )
{
free_tree (item);
return GNUNET_SYSERR;
}
}
*dst = item;
return GNUNET_OK;
}
/**
* We've gotten a HELLO from another peer. Consider it for
* advertising.
*
* @param hello the HELLO we got
*/
static void
consider_for_advertising (const struct GNUNET_HELLO_Message *hello)
{
int have_address;
struct GNUNET_PeerIdentity pid;
struct GNUNET_TIME_Absolute dt;
struct GNUNET_HELLO_Message *nh;
struct Peer *peer;
uint16_t size;
if (GNUNET_OK != GNUNET_HELLO_get_id (hello, &pid))
{
GNUNET_break (0);
return;
}
if (0 == memcmp (&pid, &my_identity, sizeof (struct GNUNET_PeerIdentity)))
return; /* that's me! */
have_address = GNUNET_NO;
GNUNET_HELLO_iterate_addresses (hello, GNUNET_NO, &address_iterator,
&have_address);
if (GNUNET_NO == have_address)
return; /* no point in advertising this one... */
peer = GNUNET_CONTAINER_multihashmap_get (peers, &pid.hashPubKey);
if (NULL == peer)
{
peer = make_peer (&pid, hello, GNUNET_NO);
}
else if (peer->hello != NULL)
{
dt = GNUNET_HELLO_equals (peer->hello, hello, GNUNET_TIME_absolute_get ());
if (dt.abs_value == GNUNET_TIME_UNIT_FOREVER_ABS.abs_value)
return; /* nothing new here */
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Found `%s' from peer `%s' for advertising\n", "HELLO",
GNUNET_i2s (&pid));
if (peer->hello != NULL)
{
nh = GNUNET_HELLO_merge (peer->hello, hello);
GNUNET_free (peer->hello);
peer->hello = nh;
}
else
{
size = GNUNET_HELLO_size (hello);
peer->hello = GNUNET_malloc (size);
memcpy (peer->hello, hello, size);
}
if (peer->filter != NULL)
GNUNET_CONTAINER_bloomfilter_free (peer->filter);
setup_filter (peer);
/* since we have a new HELLO to pick from, re-schedule all
* HELLO requests that are not bound by the HELLO send rate! */
GNUNET_CONTAINER_multihashmap_iterate (peers, &reschedule_hellos, peer);
}
/**
* Create a connection handle by (asynchronously) connecting to a host.
* This function returns immediately, even if the connection has not
* yet been established. This function only creates TCP connections.
*
* @param cfg configuration to use
* @param hostname name of the host to connect to
* @param port port to connect to
* @return the connection handle
*/
struct GNUNET_CONNECTION_Handle *
GNUNET_CONNECTION_create_from_connect (const struct GNUNET_CONFIGURATION_Handle
*cfg, const char *hostname,
uint16_t port)
{
struct GNUNET_CONNECTION_Handle *connection;
GNUNET_assert (0 < strlen (hostname)); /* sanity check */
connection = GNUNET_malloc (sizeof (struct GNUNET_CONNECTION_Handle));
connection->cfg = cfg;
connection->write_buffer_size = GNUNET_SERVER_MIN_BUFFER_SIZE;
connection->write_buffer = GNUNET_malloc (connection->write_buffer_size);
connection->port = port;
connection->hostname = GNUNET_strdup (hostname);
connection->dns_active =
GNUNET_RESOLVER_ip_get (connection->hostname, AF_UNSPEC,
GNUNET_CONNECTION_CONNECT_RETRY_TIMEOUT,
&try_connect_using_address, connection);
return connection;
}
/**
* Obtain the network address of the other party.
*
* @param connection the client to get the address for
* @param addr where to store the address
* @param addrlen where to store the length of the address
* @return GNUNET_OK on success
*/
int
GNUNET_CONNECTION_get_address (struct GNUNET_CONNECTION_Handle *connection,
void **addr, size_t * addrlen)
{
if ((NULL == connection->addr) || (0 == connection->addrlen))
return GNUNET_NO;
*addr = GNUNET_malloc (connection->addrlen);
memcpy (*addr, connection->addr, connection->addrlen);
*addrlen = connection->addrlen;
return GNUNET_OK;
}
/**
* Send a message via DV service.
*
* @param sh service handle
* @param target intended recpient
* @param msg message payload
* @param cb function to invoke when done
* @param cb_cls closure for @a cb
* @return handle to cancel the operation
*/
struct GNUNET_DV_TransmitHandle *
GNUNET_DV_send (struct GNUNET_DV_ServiceHandle *sh,
const struct GNUNET_PeerIdentity *target,
const struct GNUNET_MessageHeader *msg,
GNUNET_DV_MessageSentCallback cb,
void *cb_cls)
{
struct GNUNET_DV_TransmitHandle *th;
struct GNUNET_DV_SendMessage *sm;
struct ConnectedPeer *peer;
if (ntohs (msg->size) + sizeof (struct GNUNET_DV_SendMessage) >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
{
GNUNET_break (0);
return NULL;
}
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Asked to send %u bytes of type %u to %s via %p\n",
(unsigned int) ntohs (msg->size),
(unsigned int) ntohs (msg->type),
GNUNET_i2s (target),
sh->client);
peer = GNUNET_CONTAINER_multipeermap_get (sh->peers,
target);
if (NULL == peer)
{
GNUNET_break (0);
return NULL;
}
th = GNUNET_malloc (sizeof (struct GNUNET_DV_TransmitHandle) +
sizeof (struct GNUNET_DV_SendMessage) +
ntohs (msg->size));
th->sh = sh;
th->target = peer;
th->cb = cb;
th->cb_cls = cb_cls;
th->msg = (const struct GNUNET_MessageHeader *) &th[1];
sm = (struct GNUNET_DV_SendMessage *) &th[1];
sm->header.type = htons (GNUNET_MESSAGE_TYPE_DV_SEND);
sm->header.size = htons (sizeof (struct GNUNET_DV_SendMessage) +
ntohs (msg->size));
if (0 == sh->uid_gen)
sh->uid_gen = 1;
th->uid = sh->uid_gen;
sm->uid = htonl (sh->uid_gen++);
/* use memcpy here as 'target' may not be sufficiently aligned */
memcpy (&sm->target, target, sizeof (struct GNUNET_PeerIdentity));
memcpy (&sm[1], msg, ntohs (msg->size));
GNUNET_CONTAINER_DLL_insert_tail (sh->th_head,
sh->th_tail,
th);
start_transmit (sh);
return th;
}
/**
* Return unique variant of the namespace name.
* Use it after GNUNET_PSEUDONYM_get_info() to make sure
* that name is unique.
*
* @param cfg configuration
* @param nsid cryptographic ID of the namespace
* @param name name to uniquify
* @param suffix if not NULL, filled with the suffix value
* @return NULL on failure (should never happen), name on success.
* Free the name with GNUNET_free().
*/
char *
GNUNET_PSEUDONYM_name_uniquify (const struct GNUNET_CONFIGURATION_Handle *cfg,
const struct GNUNET_HashCode * nsid, const char *name, unsigned int *suffix)
{
struct GNUNET_HashCode nh;
uint64_t len;
char *fn;
struct GNUNET_DISK_FileHandle *fh;
unsigned int i;
unsigned int idx;
char *ret;
struct stat sbuf;
GNUNET_CRYPTO_hash (name, strlen (name), &nh);
fn = get_data_filename (cfg, PS_NAMES_DIR, &nh);
GNUNET_assert (fn != NULL);
len = 0;
if (0 == STAT (fn, &sbuf))
GNUNET_break (GNUNET_OK == GNUNET_DISK_file_size (fn, &len, GNUNET_YES, GNUNET_YES));
fh = GNUNET_DISK_file_open (fn,
GNUNET_DISK_OPEN_CREATE |
GNUNET_DISK_OPEN_READWRITE,
GNUNET_DISK_PERM_USER_READ |
GNUNET_DISK_PERM_USER_WRITE);
i = 0;
idx = -1;
while ((len >= sizeof (struct GNUNET_HashCode)) &&
(sizeof (struct GNUNET_HashCode) ==
GNUNET_DISK_file_read (fh, &nh, sizeof (struct GNUNET_HashCode))))
{
if (0 == memcmp (&nh, nsid, sizeof (struct GNUNET_HashCode)))
{
idx = i;
break;
}
i++;
len -= sizeof (struct GNUNET_HashCode);
}
if (idx == -1)
{
idx = i;
if (sizeof (struct GNUNET_HashCode) !=
GNUNET_DISK_file_write (fh, nsid, sizeof (struct GNUNET_HashCode)))
LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING, "write", fn);
}
GNUNET_DISK_file_close (fh);
ret = GNUNET_malloc (strlen (name) + 32);
GNUNET_snprintf (ret, strlen (name) + 32, "%s-%u", name, idx);
if (suffix != NULL)
*suffix = idx;
GNUNET_free (fn);
return ret;
}
/**
* Convert a string to one or more IP addresses.
*
* @param hostname the hostname to resolve
* @param af AF_INET or AF_INET6; use AF_UNSPEC for "any"
* @param callback function to call with addresses
* @param callback_cls closure for callback
* @param timeout how long to try resolving
* @return handle that can be used to cancel the request, NULL on error
*/
struct GNUNET_RESOLVER_RequestHandle *
GNUNET_RESOLVER_ip_get (const char *hostname, int af,
struct GNUNET_TIME_Relative timeout,
GNUNET_RESOLVER_AddressCallback callback,
void *callback_cls)
{
struct GNUNET_RESOLVER_RequestHandle *rh;
size_t slen;
unsigned int i;
struct in_addr v4;
struct in6_addr v6;
slen = strlen (hostname) + 1;
if (slen + sizeof (struct GNUNET_RESOLVER_GetMessage) >=
GNUNET_SERVER_MAX_MESSAGE_SIZE)
{
GNUNET_break (0);
return NULL;
}
rh = GNUNET_malloc (sizeof (struct GNUNET_RESOLVER_RequestHandle) + slen);
rh->af = af;
rh->addr_callback = callback;
rh->cls = callback_cls;
memcpy (&rh[1], hostname, slen);
rh->data_len = slen;
rh->timeout = GNUNET_TIME_relative_to_absolute (timeout);
rh->direction = GNUNET_NO;
/* first, check if this is a numeric address */
if (((1 == inet_pton (AF_INET, hostname, &v4)) &&
((af == AF_INET) || (af == AF_UNSPEC))) ||
((1 == inet_pton (AF_INET6, hostname, &v6)) &&
((af == AF_INET6) || (af == AF_UNSPEC))))
{
rh->task = GNUNET_SCHEDULER_add_now (&numeric_resolution, rh);
return rh;
}
/* then, check if this is a loopback address */
i = 0;
while (loopback[i] != NULL)
if (0 == strcasecmp (loopback[i++], hostname))
{
rh->task = GNUNET_SCHEDULER_add_now (&loopback_resolution, rh);
return rh;
}
GNUNET_CONTAINER_DLL_insert_tail (req_head, req_tail, rh);
rh->was_queued = GNUNET_YES;
if (s_task != GNUNET_SCHEDULER_NO_TASK)
{
GNUNET_SCHEDULER_cancel (s_task);
s_task = GNUNET_SCHEDULER_NO_TASK;
}
process_requests ();
return rh;
}
/**
* Initialize the connection with the NAMESTORE service.
*
* @param cfg configuration to use
* @return handle to the GNS service, or NULL on error
*/
struct GNUNET_NAMESTORE_Handle *
GNUNET_NAMESTORE_connect (const struct GNUNET_CONFIGURATION_Handle *cfg)
{
struct GNUNET_NAMESTORE_Handle *h;
h = GNUNET_malloc (sizeof (struct GNUNET_NAMESTORE_Handle));
h->cfg = cfg;
h->reconnect_task = GNUNET_SCHEDULER_add_now (&reconnect_task, h);
h->op_id = 0;
return h;
}