#include "gnunet_statistics_service.h"
#include "gns.h"
#include "gnunet-service-gns_resolver.h"
+#include "gnunet-service-gns_reverser.h"
#include "gnunet-service-gns_shorten.h"
#include "gnunet-service-gns_interceptor.h"
#include "gnunet_protocols.h"
*/
#define DHT_GNS_REPLICATION_LEVEL 5
+/**
+ * GnsClient prototype
+ */
+struct GnsClient;
/**
* Handle to a lookup operation from api
* We keep these in a DLL.
*/
struct ClientLookupHandle *prev;
-
+
/**
- * Handle to the requesting client
+ * Client handle
*/
- struct GNUNET_SERVER_Client *client;
+ struct GnsClient *gc;
/**
* Active handle for the lookup.
*/
struct GNS_ResolverHandle *lookup;
+ /**
+ * Active handle for a reverse lookup
+ */
+ struct GNS_ReverserHandle *rev_lookup;
+
/**
* request id
*/
};
+struct GnsClient
+{
+ /**
+ * The client
+ */
+ struct GNUNET_SERVICE_Client *client;
+
+ /**
+ * The MQ
+ */
+ struct GNUNET_MQ_Handle *mq;
+
+ /**
+ * Head of the DLL.
+ */
+ struct ClientLookupHandle *clh_head;
+
+ /**
+ * Tail of the DLL.
+ */
+ struct ClientLookupHandle *clh_tail;
+};
+
/**
* Handle for DHT PUT activity triggered from the namestore monitor.
*/
static struct GNUNET_NAMESTORE_ZoneMonitor *zmon;
-/**
- * Our notification context.
- */
-static struct GNUNET_SERVER_NotificationContext *nc;
-
-/**
- * Head of the DLL.
- */
-static struct ClientLookupHandle *clh_head;
-
-/**
- * Tail of the DLL.
- */
-static struct ClientLookupHandle *clh_tail;
-
/**
* Head of monitor activities; kept in a DLL.
*/
static void
shutdown_task (void *cls)
{
- struct ClientLookupHandle *clh;
struct MonitorActivity *ma;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Shutting down!\n");
- if (NULL != nc)
- {
- GNUNET_SERVER_notification_context_destroy (nc);
- nc = NULL;
- }
- while (NULL != (clh = clh_head))
- {
- GNUNET_SERVER_client_set_user_context (clh->client,
- NULL);
- GNS_resolver_lookup_cancel (clh->lookup);
- GNUNET_CONTAINER_DLL_remove (clh_head,
- clh_tail,
- clh);
- GNUNET_free (clh);
- }
-
+ "Shutting down!\n");
GNS_interceptor_done ();
if (NULL != identity_op)
{
identity_handle = NULL;
}
GNS_resolver_done ();
+ GNS_reverse_done ();
GNS_shorten_done ();
while (NULL != (ma = ma_head))
{
}
}
+/**
+ * Called whenever a client is disconnected.
+ *
+ * @param cls closure
+ * @param client identification of the client
+ * @param app_ctx @a client
+ */
+static void
+client_disconnect_cb (void *cls,
+ struct GNUNET_SERVICE_Client *client,
+ void *app_ctx)
+{
+ struct ClientLookupHandle *clh;
+ struct GnsClient *gc = app_ctx;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Client %p disconnected\n",
+ client);
+ while (NULL != (clh = gc->clh_head))
+ {
+ if (NULL != clh->lookup)
+ GNS_resolver_lookup_cancel (clh->lookup);
+ if (NULL != clh->rev_lookup)
+ GNS_reverse_lookup_cancel (clh->rev_lookup);
+ GNUNET_CONTAINER_DLL_remove (gc->clh_head,
+ gc->clh_tail,
+ clh);
+ GNUNET_free (clh);
+ }
+
+ GNUNET_free (gc);
+}
+
+
+/**
+ * Add a client to our list of active clients.
+ *
+ * @param cls NULL
+ * @param client client to add
+ * @param mq message queue for @a client
+ * @return internal namestore client structure for this client
+ */
+static void *
+client_connect_cb (void *cls,
+ struct GNUNET_SERVICE_Client *client,
+ struct GNUNET_MQ_Handle *mq)
+{
+ struct GnsClient *gc;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Client %p connected\n",
+ client);
+ gc = GNUNET_new (struct GnsClient);
+ gc->client = client;
+ gc->mq = mq;
+ return gc;
+}
+
/**
* Method called periodically that triggers iteration over authoritative records
*/
static void
dht_put_continuation (void *cls,
- int success)
+ int success)
{
struct MonitorActivity *ma = cls;
struct GNUNET_TIME_Relative next_put_interval;
struct GNUNET_DHT_PutHandle *ret;
expire = GNUNET_GNSRECORD_record_get_expiration_time (rd_public_count,
- rd_public);
+ rd_public);
block = GNUNET_GNSRECORD_block_create (key,
- expire,
- label,
- rd_public,
- rd_public_count);
+ expire,
+ label,
+ rd_public,
+ rd_public_count);
if (NULL == block)
return NULL; /* whoops */
block_size = ntohl (block->purpose.size)
+ sizeof (struct GNUNET_CRYPTO_EcdsaSignature)
+ sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey);
GNUNET_GNSRECORD_query_from_private_key (key,
- label,
- &query);
+ label,
+ &query);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Storing %u record(s) for label `%s' in DHT with expiration `%s' under key %s\n",
rd_public_count,
zone_publish_task = NULL;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Starting DHT zone update!\n");
+ "Starting DHT zone update!\n");
/* start counting again */
num_public_records = 0;
GNUNET_assert (NULL == namestore_iter);
*/
static void
send_lookup_response (void* cls,
- uint32_t rd_count,
- const struct GNUNET_GNSRECORD_Data *rd)
+ uint32_t rd_count,
+ const struct GNUNET_GNSRECORD_Data *rd)
{
struct ClientLookupHandle *clh = cls;
- struct GNUNET_GNS_ClientLookupResultMessage *rmsg;
+ struct GNUNET_MQ_Envelope *env;
+ struct LookupResultMessage *rmsg;
size_t len;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Sending LOOKUP_RESULT message with %u results\n",
- (unsigned int) rd_count);
+ "Sending LOOKUP_RESULT message with %u results\n",
+ (unsigned int) rd_count);
len = GNUNET_GNSRECORD_records_get_size (rd_count, rd);
- rmsg = GNUNET_malloc (len + sizeof (struct GNUNET_GNS_ClientLookupResultMessage));
- rmsg->header.type = htons (GNUNET_MESSAGE_TYPE_GNS_LOOKUP_RESULT);
- rmsg->header.size = htons (len + sizeof(struct GNUNET_GNS_ClientLookupResultMessage));
+ env = GNUNET_MQ_msg_extra (rmsg,
+ len,
+ GNUNET_MESSAGE_TYPE_GNS_LOOKUP_RESULT);
rmsg->id = clh->request_id;
rmsg->rd_count = htonl (rd_count);
GNUNET_GNSRECORD_records_serialize (rd_count, rd, len,
- (char*) &rmsg[1]);
- GNUNET_SERVER_notification_context_unicast (nc,
- clh->client,
- &rmsg->header,
- GNUNET_NO);
- GNUNET_free (rmsg);
- GNUNET_CONTAINER_DLL_remove (clh_head, clh_tail, clh);
- GNUNET_SERVER_client_set_user_context (clh->client, NULL);
+ (char*) &rmsg[1]);
+ GNUNET_MQ_send (GNUNET_SERVICE_client_get_mq(clh->gc->client),
+ env);
+ GNUNET_CONTAINER_DLL_remove (clh->gc->clh_head, clh->gc->clh_tail, clh);
GNUNET_free (clh);
GNUNET_STATISTICS_update (statistics,
"Completed lookups", 1,
- GNUNET_NO);
+ GNUNET_NO);
GNUNET_STATISTICS_update (statistics,
- "Records resolved",
- rd_count,
- GNUNET_NO);
+ "Records resolved",
+ rd_count,
+ GNUNET_NO);
+}
+
+/**
+ * Reply to client with the result from our reverse lookup.
+ *
+ * @param cls the closure (our client lookup handle)
+ * @param rd_count the number of records in @a rd
+ * @param rd the record data
+ */
+static void
+send_reverse_lookup_response (void* cls,
+ const char *name)
+{
+ struct ClientLookupHandle *clh = cls;
+ struct GNUNET_MQ_Envelope *env;
+ struct ReverseLookupResultMessage *rmsg;
+ size_t len;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending LOOKUP_RESULT message with %s\n",
+ name);
+
+ if (NULL == name)
+ len = 1;
+ else
+ len = strlen (name) + 1;
+ env = GNUNET_MQ_msg_extra (rmsg,
+ len,
+ GNUNET_MESSAGE_TYPE_GNS_REVERSE_LOOKUP_RESULT);
+ rmsg->id = clh->request_id;
+ if (1 < len)
+ GNUNET_memcpy ((char*) &rmsg[1],
+ name,
+ strlen (name));
+ GNUNET_MQ_send (GNUNET_SERVICE_client_get_mq(clh->gc->client),
+ env);
+ GNUNET_CONTAINER_DLL_remove (clh->gc->clh_head, clh->gc->clh_tail, clh);
+ GNUNET_free (clh);
+ GNUNET_STATISTICS_update (statistics,
+ "Completed reverse lookups", 1,
+ GNUNET_NO);
}
+/**
+ * Checks a #GNUNET_MESSAGE_TYPE_GNS_LOOKUP message
+ *
+ * @param cls client sending the message
+ * @param l_msg message of type `struct LookupMessage`
+ * @return #GNUNET_OK if @a l_msg is well-formed
+ */
+static int
+check_lookup (void *cls,
+ const struct LookupMessage *l_msg)
+{
+ size_t msg_size;
+ const char* name;
+
+ msg_size = ntohs (l_msg->header.size);
+ if (msg_size < sizeof (struct LookupMessage))
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ name = (const char *) &l_msg[1];
+ if ( ('\0' != name[msg_size - sizeof (struct LookupMessage) - 1]) ||
+ (strlen (name) > GNUNET_DNSPARSER_MAX_NAME_LENGTH) )
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ return GNUNET_OK;
+}
+
/**
* Handle lookup requests from client
*
*/
static void
handle_lookup (void *cls,
- struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
+ const struct LookupMessage *sh_msg)
{
+ struct GnsClient *gc = cls;
char name[GNUNET_DNSPARSER_MAX_NAME_LENGTH + 1];
struct ClientLookupHandle *clh;
char *nameptr = name;
const char *utf_in;
const struct GNUNET_CRYPTO_EcdsaPrivateKey *key;
- uint16_t msg_size;
- const struct GNUNET_GNS_ClientLookupMessage *sh_msg;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Received LOOKUP message\n");
- msg_size = ntohs (message->size);
- if (msg_size < sizeof (struct GNUNET_GNS_ClientLookupMessage))
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
- sh_msg = (const struct GNUNET_GNS_ClientLookupMessage *) message;
- GNUNET_SERVER_notification_context_add (nc, client);
+ "Received LOOKUP message\n");
+ GNUNET_SERVICE_client_continue (gc->client);
if (GNUNET_YES == ntohs (sh_msg->have_key))
key = &sh_msg->shorten_key;
else
key = NULL;
utf_in = (const char *) &sh_msg[1];
- if ( ('\0' != utf_in[msg_size - sizeof (struct GNUNET_GNS_ClientLookupMessage) - 1]) ||
- (strlen (utf_in) > GNUNET_DNSPARSER_MAX_NAME_LENGTH) )
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
GNUNET_STRINGS_utf8_tolower (utf_in, nameptr);
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
clh = GNUNET_new (struct ClientLookupHandle);
- GNUNET_SERVER_client_set_user_context (client, clh);
- GNUNET_CONTAINER_DLL_insert (clh_head, clh_tail, clh);
- clh->client = client;
+ GNUNET_CONTAINER_DLL_insert (gc->clh_head, gc->clh_tail, clh);
+ clh->gc = gc;
clh->request_id = sh_msg->id;
if ( (GNUNET_DNSPARSER_TYPE_A == ntohl (sh_msg->type)) &&
(GNUNET_OK != v4_enabled) )
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "LOOKUP: Query for A record but AF_INET not supported!");
+ "LOOKUP: Query for A record but AF_INET not supported!");
send_lookup_response (clh, 0, NULL);
return;
}
return;
}
clh->lookup = GNS_resolver_lookup (&sh_msg->zone,
- ntohl (sh_msg->type),
- name,
- key,
- (enum GNUNET_GNS_LocalOptions) ntohs (sh_msg->options),
- &send_lookup_response, clh);
+ ntohl (sh_msg->type),
+ name,
+ key,
+ (enum GNUNET_GNS_LocalOptions) ntohs (sh_msg->options),
+ &send_lookup_response, clh);
GNUNET_STATISTICS_update (statistics,
"Lookup attempts",
- 1, GNUNET_NO);
+ 1, GNUNET_NO);
}
-
/**
- * One of our clients disconnected, clean up after it.
+ * Handle reverse lookup requests from client
*
- * @param cls NULL
- * @param client the client that disconnected
+ * @param cls the closure
+ * @param client the client
+ * @param message the message
*/
static void
-notify_client_disconnect (void *cls,
- struct GNUNET_SERVER_Client *client)
+handle_rev_lookup (void *cls,
+ const struct ReverseLookupMessage *sh_msg)
{
+ struct GnsClient *gc = cls;
struct ClientLookupHandle *clh;
- if (NULL == client)
- return;
- clh = GNUNET_SERVER_client_get_user_context (client, struct ClientLookupHandle);
- if (NULL == clh)
- return;
- GNS_resolver_lookup_cancel (clh->lookup);
- GNUNET_CONTAINER_DLL_remove (clh_head, clh_tail, clh);
- GNUNET_free (clh);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received REVERSE_LOOKUP message\n");
+ GNUNET_SERVICE_client_continue (gc->client);
+
+ clh = GNUNET_new (struct ClientLookupHandle);
+ GNUNET_CONTAINER_DLL_insert (gc->clh_head, gc->clh_tail, clh);
+ clh->gc = gc;
+ clh->request_id = sh_msg->id;
+ clh->rev_lookup = GNS_reverse_lookup (&sh_msg->zone_pkey,
+ &sh_msg->root_pkey,
+ &send_reverse_lookup_response,
+ clh);
+ GNUNET_STATISTICS_update (statistics,
+ "Reverse lookup attempts",
+ 1, GNUNET_NO);
}
{
GNUNET_assert (NULL == zone_publish_task);
zone_publish_task = GNUNET_SCHEDULER_add_now (&publish_zone_dht_start,
- NULL);
+ NULL);
}
active_put = NULL;
}
zone_publish_task = GNUNET_SCHEDULER_add_now (&publish_zone_dht_start,
- NULL);
+ NULL);
}
+/**
+ * Method called to inform about the ego to be used for the master zone
+ * for DNS interceptions.
+ *
+ * This function is only called ONCE, and 'NULL' being passed in
+ * @a ego does indicate that interception is not configured.
+ * If @a ego is non-NULL, we should start to intercept DNS queries
+ * and resolve ".gnu" queries using the given ego as the master zone.
+ *
+ * @param cls closure, our `const struct GNUNET_CONFIGURATION_Handle *c`
+ * @param ego ego handle
+ * @param ctx context for application to store data for this ego
+ * (during the lifetime of this process, initially NULL)
+ * @param name name assigned by the user for this ego,
+ * NULL if the user just deleted the ego and it
+ * must thus no longer be used
+ */
+static void
+identity_reverse_cb (void *cls,
+ struct GNUNET_IDENTITY_Ego *ego,
+ void **ctx,
+ const char *name)
+{
+ identity_op = NULL;
+
+ if (NULL == ego)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ _("No ego configured for `%s`\n"),
+ "gns-master");
+
+ return;
+ }
+ if (GNUNET_SYSERR ==
+ GNS_reverse_init (namestore_handle,
+ GNUNET_IDENTITY_ego_get_private_key (ego),
+ name))
+ {
+ GNUNET_break (0);
+ GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
+ return;
+ }
+}
+
+
/**
* Method called to inform about the ego to be used for the master zone
{
const struct GNUNET_CONFIGURATION_Handle *cfg = cls;
struct GNUNET_CRYPTO_EcdsaPublicKey dns_root;
-
identity_op = NULL;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Looking for gns-intercept ego\n");
+ identity_op = GNUNET_IDENTITY_get (identity_handle,
+ "gns-reverse",
+ &identity_reverse_cb,
+ (void*)cfg);
+
+
if (NULL == ego)
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- _("No ego configured for `%s`\n"),
- "gns-intercept");
+ _("No ego configured for `%s`\n"),
+ "gns-intercept");
+
return;
}
GNUNET_IDENTITY_ego_get_public_key (ego,
- &dns_root);
+ &dns_root);
if (GNUNET_SYSERR ==
GNS_interceptor_init (&dns_root, cfg))
{
*/
static void
run (void *cls,
- struct GNUNET_SERVER_Handle *server,
- const struct GNUNET_CONFIGURATION_Handle *c)
+ const struct GNUNET_CONFIGURATION_Handle *c,
+ struct GNUNET_SERVICE_Handle *service)
{
- static const struct GNUNET_SERVER_MessageHandler handlers[] = {
- { &handle_lookup, NULL, GNUNET_MESSAGE_TYPE_GNS_LOOKUP, 0},
- {NULL, NULL, 0, 0}
- };
unsigned long long max_parallel_bg_queries = 0;
v6_enabled = GNUNET_NETWORK_test_pf (PF_INET6);
if (NULL == namestore_handle)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _("Failed to connect to the namestore!\n"));
+ _("Failed to connect to the namestore!\n"));
GNUNET_SCHEDULER_shutdown ();
return;
}
if (NULL == namecache_handle)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _("Failed to connect to the namecache!\n"));
+ _("Failed to connect to the namecache!\n"));
GNUNET_SCHEDULER_shutdown ();
return;
}
zone_publish_time_window_default = DEFAULT_ZONE_PUBLISH_TIME_WINDOW;
if (GNUNET_OK ==
GNUNET_CONFIGURATION_get_value_time (c, "gns",
- "ZONE_PUBLISH_TIME_WINDOW",
- &zone_publish_time_window_default))
+ "ZONE_PUBLISH_TIME_WINDOW",
+ &zone_publish_time_window_default))
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Time window for zone iteration: %s\n",
- GNUNET_STRINGS_relative_time_to_string (zone_publish_time_window,
+ "Time window for zone iteration: %s\n",
+ GNUNET_STRINGS_relative_time_to_string (zone_publish_time_window,
GNUNET_YES));
}
zone_publish_time_window = zone_publish_time_window_default;
if (GNUNET_OK ==
GNUNET_CONFIGURATION_get_value_number (c, "gns",
- "MAX_PARALLEL_BACKGROUND_QUERIES",
- &max_parallel_bg_queries))
+ "MAX_PARALLEL_BACKGROUND_QUERIES",
+ &max_parallel_bg_queries))
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Number of allowed parallel background queries: %llu\n",
- max_parallel_bg_queries);
+ "Number of allowed parallel background queries: %llu\n",
+ max_parallel_bg_queries);
}
dht_handle = GNUNET_DHT_connect (c,
- (unsigned int) max_parallel_bg_queries);
+ (unsigned int) max_parallel_bg_queries);
if (NULL == dht_handle)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _("Could not connect to DHT!\n"));
+ _("Could not connect to DHT!\n"));
GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
return;
}
if (NULL == identity_handle)
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "Could not connect to identity service!\n");
+ "Could not connect to identity service!\n");
}
else
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Looking for gns-intercept ego\n");
+ "Looking for gns-intercept ego\n");
identity_op = GNUNET_IDENTITY_get (identity_handle,
"gns-intercept",
&identity_intercept_cb,
}
GNS_resolver_init (namecache_handle,
dht_handle,
- c,
- max_parallel_bg_queries);
+ c,
+ max_parallel_bg_queries);
GNS_shorten_init (namestore_handle,
namecache_handle,
dht_handle);
- GNUNET_SERVER_disconnect_notify (server,
- ¬ify_client_disconnect,
- NULL);
/* Schedule periodic put for our records. */
first_zone_iteration = GNUNET_YES;
- GNUNET_SERVER_add_handlers (server, handlers);
statistics = GNUNET_STATISTICS_create ("gns", c);
- nc = GNUNET_SERVER_notification_context_create (server, 1);
zmon = GNUNET_NAMESTORE_zone_monitor_start (c,
NULL,
GNUNET_NO,
/**
- * The main function for the GNS service.
- *
- * @param argc number of arguments from the command line
- * @param argv command line arguments
- * @return 0 ok, 1 on error
+ * Define "main" method using service macro.
*/
-int
-main (int argc, char *const *argv)
-{
- int ret;
+GNUNET_SERVICE_MAIN
+("gns",
+ GNUNET_SERVICE_OPTION_NONE,
+ &run,
+ &client_connect_cb,
+ &client_disconnect_cb,
+ NULL,
+ GNUNET_MQ_hd_var_size (lookup,
+ GNUNET_MESSAGE_TYPE_GNS_LOOKUP,
+ struct LookupMessage,
+ NULL),
+ GNUNET_MQ_hd_fixed_size (rev_lookup,
+ GNUNET_MESSAGE_TYPE_GNS_REVERSE_LOOKUP,
+ struct ReverseLookupMessage,
+ NULL),
+ GNUNET_MQ_handler_end());
- ret =
- (GNUNET_OK ==
- GNUNET_SERVICE_run (argc, argv, "gns", GNUNET_SERVICE_OPTION_NONE, &run,
- NULL)) ? 0 : 1;
- return ret;
-}
/* end of gnunet-service-gns.c */
projects / oweals / gnunet.git / blobdiff