* @author Christian Grothoff
*/
#include "platform.h"
+#include "gnunet-service-transport_blacklist.h"
#include "gnunet-service-transport_clients.h"
#include "gnunet-service-transport_hello.h"
#include "gnunet-service-transport_neighbours.h"
+#include "gnunet-service-transport_plugins.h"
+#include "gnunet-service-transport_validation.h"
#include "gnunet-service-transport.h"
#include "transport.h"
*/
unsigned int message_count;
+ /**
+ * Is this client interested in payload messages?
+ */
+ int send_payload;
};
*/
static struct TransportClient *clients_tail;
-
/**
* Find the internal handle associated with the given client handle
*
{
struct TransportClient *tc;
- tc = clients_head;
+ tc = clients_head;
while (tc != NULL)
- {
- if (tc->client == client)
- return tc;
- tc = tc->next;
- }
+ {
+ if (tc->client == client)
+ return tc;
+ tc = tc->next;
+ }
return NULL;
}
setup_client (struct GNUNET_SERVER_Client *client)
{
struct TransportClient *tc;
-
+
+ GNUNET_assert (lookup_client (client) == NULL);
tc = GNUNET_malloc (sizeof (struct TransportClient));
tc->client = client;
- GNUNET_CONTAINER_DLL_insert (clients_head,
- clients_tail,
- tc);
+
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Client %X connected\n", tc);
+#endif
return tc;
}
* @return number of bytes written to buf
*/
static size_t
-transmit_to_client_callback (void *cls,
- size_t size,
- void *buf)
+transmit_to_client_callback (void *cls, size_t size, void *buf)
{
struct TransportClient *tc = cls;
struct ClientMessageQueueEntry *q;
tc->th = NULL;
if (buf == NULL)
- {
-#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Transmission to client failed, closing connection.\n");
+ {
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Transmission to client failed, closing connection.\n");
#endif
- return 0;
- }
+ return 0;
+ }
cbuf = buf;
tsize = 0;
while (NULL != (q = tc->message_queue_head))
- {
- msg = (const struct GNUNET_MessageHeader *) &q[1];
- msize = ntohs (msg->size);
- if (msize + tsize > size)
- break;
+ {
+ msg = (const struct GNUNET_MessageHeader *) &q[1];
+ msize = ntohs (msg->size);
+ if (msize + tsize > size)
+ break;
#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Transmitting message of type %u to client.\n",
- ntohs (msg->type));
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Transmitting message of type %u to client %X.\n",
+ ntohs (msg->type), tc);
#endif
- GNUNET_CONTAINER_DLL_remove (tc->message_queue_head,
- tc->message_queue_tail,
- q);
- tc->message_count--;
- memcpy (&cbuf[tsize],
- msg,
- msize);
- GNUNET_free (q);
- tsize += msize;
- }
+ GNUNET_CONTAINER_DLL_remove (tc->message_queue_head, tc->message_queue_tail,
+ q);
+ tc->message_count--;
+ memcpy (&cbuf[tsize], msg, msize);
+ GNUNET_free (q);
+ tsize += msize;
+ }
if (NULL != q)
- {
- GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
- tc->th = GNUNET_SERVER_notify_transmit_ready (tc->client,
- msize,
- GNUNET_TIME_UNIT_FOREVER_REL,
- &transmit_to_client_callback,
- tc);
- GNUNET_assert (tc->th != NULL);
- }
+ {
+ GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
+ tc->th =
+ GNUNET_SERVER_notify_transmit_ready (tc->client, msize,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &transmit_to_client_callback, tc);
+ GNUNET_assert (tc->th != NULL);
+ }
return tsize;
}
/**
* Queue the given message for transmission to the given client
*
- * @param client target of the message
+ * @param tc target of the message
* @param msg message to transmit
* @param may_drop GNUNET_YES if the message can be dropped
*/
static void
-unicast (struct TransportClient *tc,
- const struct GNUNET_MessageHeader *msg,
- int may_drop)
+unicast (struct TransportClient *tc, const struct GNUNET_MessageHeader *msg,
+ int may_drop)
{
struct ClientMessageQueueEntry *q;
uint16_t msize;
- if ( (tc->message_count >= MAX_PENDING) &&
- (GNUNET_YES == may_drop) )
- {
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- _("Dropping message of type %u and size %u, have %u/%u messages pending\n"),
- ntohs (msg->type),
- ntohs (msg->size),
- tc->message_count,
- MAX_PENDING);
- GNUNET_STATISTICS_update (GST_stats,
- gettext_noop ("# messages dropped due to slow client"),
- 1,
- GNUNET_NO);
- return;
- }
+ if ((tc->message_count >= MAX_PENDING) && (GNUNET_YES == may_drop))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ _
+ ("Dropping message of type %u and size %u, have %u/%u messages pending\n"),
+ ntohs (msg->type), ntohs (msg->size), tc->message_count,
+ MAX_PENDING);
+ GNUNET_STATISTICS_update (GST_stats,
+ gettext_noop
+ ("# messages dropped due to slow client"), 1,
+ GNUNET_NO);
+ return;
+ }
msize = ntohs (msg->size);
GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
q = GNUNET_malloc (sizeof (struct ClientMessageQueueEntry) + msize);
memcpy (&q[1], msg, msize);
GNUNET_CONTAINER_DLL_insert_tail (tc->message_queue_head,
- tc->message_queue_tail,
- q);
+ tc->message_queue_tail, q);
tc->message_count++;
if (tc->th != NULL)
return;
- tc->th = GNUNET_SERVER_notify_transmit_ready (tc->client,
- msize,
- GNUNET_TIME_UNIT_FOREVER_REL,
- &transmit_to_client_callback,
- tc);
- GNUNET_assert (tc->th != NULL);
+ tc->th =
+ GNUNET_SERVER_notify_transmit_ready (tc->client, msize,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &transmit_to_client_callback, tc);
+ GNUNET_assert (tc->th != NULL);
}
* @param client identification of the client
*/
static void
-client_disconnect_notification (void *cls,
- struct GNUNET_SERVER_Client *client)
+client_disconnect_notification (void *cls, struct GNUNET_SERVER_Client *client)
{
struct TransportClient *tc;
struct ClientMessageQueueEntry *mqe;
return;
#if DEBUG_TRANSPORT
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
- "Client disconnected, cleaning up.\n");
+ "Client %X disconnected, cleaning up.\n", tc);
#endif
while (NULL != (mqe = tc->message_queue_head))
- {
- GNUNET_CONTAINER_DLL_remove (tc->message_queue_head,
- tc->message_queue_tail,
- mqe);
- tc->message_count--;
- GNUNET_free (mqe);
- }
- GNUNET_CONTAINER_DLL_remove (clients_head,
- clients_tail,
- tc);
+ {
+ GNUNET_CONTAINER_DLL_remove (tc->message_queue_head, tc->message_queue_tail,
+ mqe);
+ tc->message_count--;
+ GNUNET_free (mqe);
+ }
+ GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, tc);
if (tc->th != NULL)
- {
- GNUNET_CONNECTION_notify_transmit_ready_cancel (tc->th);
- tc->th = NULL;
- }
+ {
+ GNUNET_CONNECTION_notify_transmit_ready_cancel (tc->th);
+ tc->th = NULL;
+ }
GNUNET_break (0 == tc->message_count);
GNUNET_free (tc);
}
-/**
- * Start handling requests from clients.
- *
- * @param server server used to accept clients from.
- */
-void
-GST_clients_start (struct GNUNET_SERVER_Handle *server)
-{
- GNUNET_SERVER_disconnect_notify (server,
- &client_disconnect_notification, NULL);
-}
-
-
-/**
- * Stop processing clients.
- */
-void
-GST_clients_stop ()
-{
- /* nothing to do */
-}
-
-
/**
* Function called for each of our connected neighbours. Notify the
* client about the existing neighbour.
* @param peer identity of the neighbour
* @param ats performance data
* @param ats_count number of entries in ats (excluding 0-termination)
+ * @param address the address
*/
static void
notify_client_about_neighbour (void *cls,
- const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_TRANSPORT_ATS_Information *ats,
- uint32_t ats_count)
+ const struct GNUNET_PeerIdentity *peer,
+ const struct GNUNET_ATS_Information *ats,
+ uint32_t ats_count,
+ const struct GNUNET_HELLO_Address *address)
{
struct TransportClient *tc = cls;
struct ConnectInfoMessage *cim;
- size_t size;
+ struct GNUNET_ATS_Information *ap;
+ size_t size =
+ sizeof (struct ConnectInfoMessage) +
+ ats_count * sizeof (struct GNUNET_ATS_Information);
+ char buf[size];
- size = sizeof (struct ConnectInfoMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
GNUNET_assert (size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
- cim = GNUNET_malloc (size);
+ cim = (struct ConnectInfoMessage *) buf;
cim->header.size = htons (size);
cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
- cim->ats_count = htonl(ats_count);
+ cim->ats_count = htonl (ats_count);
cim->id = *peer;
- memcpy (&cim->ats,
- ats,
- ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information));
+ ap = (struct GNUNET_ATS_Information *) &cim[1];
+ memcpy (ap, ats, ats_count * sizeof (struct GNUNET_ATS_Information));
unicast (tc, &cim->header, GNUNET_NO);
- GNUNET_free (cim);
}
* @param client the client
* @param message the start message that was sent
*/
-void
-GST_clients_handle_start (void *cls,
- struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
+static void
+clients_handle_start (void *cls, struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
{
const struct StartMessage *start;
struct TransportClient *tc;
+ uint32_t options;
tc = lookup_client (client);
+
+#if DEBUG_TRANSPORT
if (tc != NULL)
- {
- /* got 'start' twice from the same client, not allowed */
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
- start = (const struct StartMessage*) message;
- if ( (GNUNET_NO != ntohl (start->do_check)) &&
- (0 != memcmp (&start->self,
- &GST_my_identity,
- sizeof (struct GNUNET_PeerIdentity))) )
- {
- /* client thinks this is a different peer, reject */
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _("Rejecting control connection from peer `%s', which is not me!\n"),
- GNUNET_i2s (&start->self));
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
+ "Client %X sent START\n", tc);
+ else
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
+ "Client %X sent START\n", tc);
+#endif
+ if (tc != NULL)
+ {
+ /* got 'start' twice from the same client, not allowed */
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
+ "TransportClient %X ServerClient %X sent multiple START messages\n",
+ tc, tc->client);
+#endif
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ start = (const struct StartMessage *) message;
+ options = ntohl (start->options);
+ if ((0 != (1 & options)) &&
+ (0 !=
+ memcmp (&start->self, &GST_my_identity,
+ sizeof (struct GNUNET_PeerIdentity))))
+ {
+ /* client thinks this is a different peer, reject */
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _
+ ("Rejecting control connection from peer `%s', which is not me!\n"),
+ GNUNET_i2s (&start->self));
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
tc = setup_client (client);
- unicast (tc, GST_hello_get(), GNUNET_NO);
+ tc->send_payload = (0 != (2 & options));
+ unicast (tc, GST_hello_get (), GNUNET_NO);
GST_neighbours_iterate (¬ify_client_about_neighbour, tc);
+ GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, tc);
GNUNET_SERVER_receive_done (client, GNUNET_OK);
}
/**
- * Client asked for transmission to a peer. Process the request.
+ * Client sent us a HELLO. Process the request.
*
* @param cls unused
* @param client the client
- * @param message the send message that was sent
+ * @param message the HELLO message
*/
-void
-GST_clients_handle_send (void *cls,
- struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
+static void
+clients_handle_hello (void *cls, struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
{
+ GST_validation_handle_hello (message);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
}
/**
- * Client asked for a quota change for a particular peer. Process the request.
+ * Closure for 'handle_send_transmit_continuation'
+ */
+struct SendTransmitContinuationContext
+{
+ /**
+ * Client that made the request.
+ */
+ struct GNUNET_SERVER_Client *client;
+
+ /**
+ * Peer that was the target.
+ */
+ struct GNUNET_PeerIdentity target;
+};
+
+
+/**
+ * Function called after the transmission is done. Notify the client that it is
+ * OK to send the next message.
+ *
+ * @param cls closure
+ * @param success GNUNET_OK on success, GNUNET_NO on failure, GNUNET_SYSERR if we're not connected
+ */
+static void
+handle_send_transmit_continuation (void *cls, int success)
+{
+ struct SendTransmitContinuationContext *stcc = cls;
+ struct SendOkMessage send_ok_msg;
+
+ send_ok_msg.header.size = htons (sizeof (send_ok_msg));
+ send_ok_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SEND_OK);
+ send_ok_msg.success = htonl (success);
+ send_ok_msg.latency =
+ GNUNET_TIME_relative_hton (GNUNET_TIME_UNIT_FOREVER_REL);
+ send_ok_msg.peer = stcc->target;
+ GST_clients_unicast (stcc->client, &send_ok_msg.header, GNUNET_NO);
+ GNUNET_SERVER_client_drop (stcc->client);
+ GNUNET_free (stcc);
+}
+
+
+/**
+ * Client asked for transmission to a peer. Process the request.
*
* @param cls unused
* @param client the client
- * @param message the quota changing message
+ * @param message the send message that was sent
*/
-void
-GST_clients_handle_set_quota (void *cls,
- struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
+static void
+clients_handle_send (void *cls, struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
{
+ const struct OutboundMessage *obm;
+ const struct GNUNET_MessageHeader *obmm;
+ struct SendTransmitContinuationContext *stcc;
+ uint16_t size;
+ uint16_t msize;
+ struct TransportClient *tc;
+
+ tc = lookup_client (client);
+ if (NULL == tc)
+ {
+ /* client asked for transmission before 'START' */
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+
+ size = ntohs (message->size);
+ if (size <
+ sizeof (struct OutboundMessage) + sizeof (struct GNUNET_MessageHeader))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ obm = (const struct OutboundMessage *) message;
+ obmm = (const struct GNUNET_MessageHeader *) &obm[1];
+ msize = size - sizeof (struct OutboundMessage);
+ if (msize < sizeof (struct GNUNET_MessageHeader))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ GNUNET_STATISTICS_update (GST_stats,
+ gettext_noop
+ ("# bytes payload received for other peers"), msize,
+ GNUNET_NO);
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received `%s' request from client with target `%4s' and first message of type %u and total size %u\n",
+ "SEND", GNUNET_i2s (&obm->peer), ntohs (obmm->type), msize);
+#endif
+ if (GNUNET_NO == GST_neighbours_test_connected (&obm->peer))
+ {
+ /* not connected, not allowed to send; can happen due to asynchronous operations */
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Could not send message to peer `%s': not connected\n",
+ GNUNET_i2s (&obm->peer));
+#endif
+ GNUNET_STATISTICS_update (GST_stats,
+ gettext_noop
+ ("# bytes payload dropped (other peer was not connected)"),
+ msize, GNUNET_NO);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ stcc = GNUNET_malloc (sizeof (struct SendTransmitContinuationContext));
+ stcc->target = obm->peer;
+ stcc->client = client;
+ GNUNET_SERVER_client_keep (client);
+ GST_neighbours_send (&obm->peer, obmm, msize,
+ GNUNET_TIME_relative_ntoh (obm->timeout),
+ &handle_send_transmit_continuation, stcc);
+}
+
+
+/**
+ * Try to initiate a connection to the given peer if the blacklist
+ * allowed it.
+ *
+ * @param cls closure (unused, NULL)
+ * @param peer identity of peer that was tested
+ * @param result GNUNET_OK if the connection is allowed,
+ * GNUNET_NO if not
+ */
+static void
+try_connect_if_allowed (void *cls, const struct GNUNET_PeerIdentity *peer,
+ int result)
+{
+ if (GNUNET_OK != result)
+ return; /* not allowed */
+ GST_neighbours_try_connect (peer);
+}
+
+
+/**
+ * Handle request connect message
+ *
+ * @param cls closure (always NULL)
+ * @param client identification of the client
+ * @param message the actual message
+ */
+static void
+clients_handle_request_connect (void *cls, struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ const struct TransportRequestConnectMessage *trcm =
+ (const struct TransportRequestConnectMessage *) message;
+
+ GNUNET_STATISTICS_update (GST_stats,
+ gettext_noop
+ ("# REQUEST CONNECT messages received"), 1,
+ GNUNET_NO);
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received a request connect message for peer `%s'\n",
+ GNUNET_i2s (&trcm->peer));
+#endif
+ (void) GST_blacklist_test_allowed (&trcm->peer, NULL, &try_connect_if_allowed,
+ NULL);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+}
+
+
+/**
+ * Take the given address and append it to the set of results sent back to
+ * the client.
+ *
+ * @param cls the transmission context used ('struct GNUNET_SERVER_TransmitContext*')
+ * @param buf text to transmit
+ */
+static void
+transmit_address_to_client (void *cls, const char *buf)
+{
+ struct GNUNET_SERVER_TransmitContext *tc = cls;
+
+ if (NULL == buf)
+ {
+ GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
+ GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_TO_STRING_REPLY);
+ GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
+ return;
+ }
+ GNUNET_SERVER_transmit_context_append_data (tc, buf, strlen (buf) + 1,
+ GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_TO_STRING_REPLY);
}
* @param client the client
* @param message the resolution request
*/
-void
-GST_clients_handle_address_lookup (void *cls,
- struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
+static void
+clients_handle_address_to_string (void *cls,
+ struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
{
+ const struct AddressLookupMessage *alum;
+ struct GNUNET_TRANSPORT_PluginFunctions *papi;
+ const char *plugin_name;
+ const char *address;
+ uint32_t address_len;
+ uint16_t size;
+ struct GNUNET_SERVER_TransmitContext *tc;
+ struct GNUNET_TIME_Relative rtimeout;
+ int32_t numeric;
+
+ size = ntohs (message->size);
+ if (size < sizeof (struct AddressLookupMessage))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ alum = (const struct AddressLookupMessage *) message;
+ address_len = ntohs (alum->addrlen);
+ if (size <= sizeof (struct AddressLookupMessage) + address_len)
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ address = (const char *) &alum[1];
+ plugin_name = (const char *) &address[address_len];
+ if (plugin_name[size - sizeof (struct AddressLookupMessage) - address_len - 1]
+ != '\0')
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ rtimeout = GNUNET_TIME_relative_ntoh (alum->timeout);
+ numeric = ntohs (alum->numeric_only);
+ tc = GNUNET_SERVER_transmit_context_create (client);
+ papi = GST_plugins_find (plugin_name);
+ if (NULL == papi)
+ {
+ GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
+ GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_TO_STRING_REPLY);
+ GNUNET_SERVER_transmit_context_run (tc, rtimeout);
+ return;
+ }
+ GNUNET_SERVER_disable_receive_done_warning (client);
+ papi->address_pretty_printer (papi->cls, plugin_name, address, address_len,
+ numeric, rtimeout, &transmit_address_to_client,
+ tc);
}
/**
- * Client asked to obtain information about a peer's addresses.
- * Process the request.
+ * Output the active address of connected neighbours to the given client.
*
- * @param cls unused
- * @param client the client
- * @param message the peer address information request
+ * @param cls the 'struct GNUNET_SERVER_TransmitContext' for transmission to the client
+ * @param peer identity of the neighbour
+ * @param ats performance data
+ * @param ats_count number of entries in ats (excluding 0-termination)
+ * @param address the address
*/
-void
-GST_clients_handle_peer_address_lookup (void *cls,
- struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
+static void
+output_address (void *cls, const struct GNUNET_PeerIdentity *peer,
+ const struct GNUNET_ATS_Information *ats, uint32_t ats_count,
+ const struct GNUNET_HELLO_Address *address)
{
+ struct GNUNET_SERVER_TransmitContext *tc = cls;
+ struct AddressIterateResponseMessage *msg;
+ size_t size;
+ size_t tlen;
+ size_t alen;
+ char *addr;
+
+ tlen = strlen (address->transport_name) + 1;
+ alen = address->address_length;
+ size = (sizeof (struct AddressIterateResponseMessage) + alen + tlen);
+ {
+ char buf[size];
+
+ msg = (struct AddressIterateResponseMessage *) buf;
+ msg->reserved = htonl (0);
+ msg->peer = *peer;
+ msg->addrlen = htonl (alen);
+ msg->pluginlen = htonl (tlen);
+ addr = (char *) &msg[1];
+ memcpy (addr, address->address, alen);
+ memcpy (&addr[alen], address->transport_name, tlen);
+ GNUNET_SERVER_transmit_context_append_data (tc,
+ &buf[sizeof
+ (struct
+ GNUNET_MessageHeader)],
+ size -
+ sizeof (struct
+ GNUNET_MessageHeader),
+ GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE_RESPONSE);
+ }
}
/**
- * Client asked to obtain information about all addresses.
+ * Client asked to obtain information about all actively used addresses
+ * of connected peers
* Process the request.
*
* @param cls unused
* @param client the client
* @param message the peer address information request
*/
+static void
+clients_handle_address_iterate (void *cls, struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ static struct GNUNET_PeerIdentity all_zeros;
+ struct GNUNET_SERVER_TransmitContext *tc;
+ struct AddressIterateMessage *msg;
+ struct GNUNET_HELLO_Address *address;
+
+ if (ntohs (message->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE)
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ if (ntohs (message->size) != sizeof (struct AddressIterateMessage))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ msg = (struct AddressIterateMessage *) message;
+ if (GNUNET_YES != ntohl (msg->one_shot))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Address monitoring not implemented\n");
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ GNUNET_SERVER_disable_receive_done_warning (client);
+ tc = GNUNET_SERVER_transmit_context_create (client);
+ if (0 == memcmp (&msg->peer, &all_zeros, sizeof (struct GNUNET_PeerIdentity)))
+ {
+ /* iterate over all neighbours */
+ GST_neighbours_iterate (&output_address, tc);
+ }
+ else
+ {
+ /* just return one neighbour */
+ address = GST_neighbour_get_current_address (&msg->peer);
+ if (address != NULL)
+ output_address (tc, &msg->peer, NULL, 0, address);
+ }
+ GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
+ GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE_RESPONSE);
+ GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
+}
+
+
+/**
+ * Start handling requests from clients.
+ *
+ * @param server server used to accept clients from.
+ */
void
-GST_clients_handle_address_iterate (void *cls,
- struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
+GST_clients_start (struct GNUNET_SERVER_Handle *server)
{
+ static const struct GNUNET_SERVER_MessageHandler handlers[] = {
+ {&clients_handle_start, NULL,
+ GNUNET_MESSAGE_TYPE_TRANSPORT_START, sizeof (struct StartMessage)},
+ {&clients_handle_hello, NULL,
+ GNUNET_MESSAGE_TYPE_HELLO, 0},
+ {&clients_handle_send, NULL,
+ GNUNET_MESSAGE_TYPE_TRANSPORT_SEND, 0},
+ {&clients_handle_request_connect, NULL,
+ GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_CONNECT,
+ sizeof (struct TransportRequestConnectMessage)},
+ {&clients_handle_address_to_string, NULL,
+ GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_TO_STRING, 0},
+ {&clients_handle_address_iterate, NULL,
+ GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE,
+ sizeof (struct AddressIterateMessage)},
+ {&GST_blacklist_handle_init, NULL,
+ GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_INIT,
+ sizeof (struct GNUNET_MessageHeader)},
+ {&GST_blacklist_handle_reply, NULL,
+ GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_REPLY,
+ sizeof (struct BlacklistMessage)},
+ {NULL, NULL, 0, 0}
+ };
+ GNUNET_SERVER_add_handlers (server, handlers);
+ GNUNET_SERVER_disconnect_notify (server, &client_disconnect_notification,
+ NULL);
+}
+
+
+/**
+ * Stop processing clients.
+ */
+void
+GST_clients_stop ()
+{
+ /* nothing to do */
}
* Broadcast the given message to all of our clients.
*
* @param msg message to broadcast
- * @param may_drop GNUNET_YES if the message can be dropped
+ * @param may_drop GNUNET_YES if the message can be dropped / is payload
*/
void
-GST_clients_broadcast (const struct GNUNET_MessageHeader *msg,
- int may_drop)
+GST_clients_broadcast (const struct GNUNET_MessageHeader *msg, int may_drop)
{
struct TransportClient *tc;
for (tc = clients_head; tc != NULL; tc = tc->next)
+ {
+ if ((GNUNET_YES == may_drop) && (GNUNET_YES != tc->send_payload))
+ continue; /* skip, this client does not care about payload */
unicast (tc, msg, may_drop);
+ }
}
*/
void
GST_clients_unicast (struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *msg,
- int may_drop)
+ const struct GNUNET_MessageHeader *msg, int may_drop)
{
struct TransportClient *tc;
tc = lookup_client (client);
if (NULL == tc)
- tc = setup_client (client);
+ return; /* client got disconnected in the meantime, drop message */
unicast (tc, msg, may_drop);
}
projects / oweals / gnunet.git / blobdiff