#include "gnunet-service-transport_clients.h"
#include "gnunet-service-transport.h"
#include "gnunet_peerinfo_service.h"
+#include "gnunet-service-transport_blacklist.h"
#include "gnunet_constants.h"
#include "transport.h"
#define KEEPALIVE_FREQUENCY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 90)
+#define ATS_RESPONSE_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 3)
+
+
+#define SETUP_CONNECTION_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 15)
+
+
/**
* Entry in neighbours.
*/
*/
struct GNUNET_TIME_AbsoluteNBO timestamp;
+ /**
+ * Public key of the sender.
+ */
+ struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded public_key;
+
/**
* Signature of the peer that sends us the disconnect. Only
* valid if the timestamp is AFTER the timestamp from the
* corresponding 'CONNECT' message.
*/
struct GNUNET_CRYPTO_RsaSignature signature;
+
};
};
+enum State
+{
+ /* fresh peer or completely disconnected */
+ S_NOT_CONNECTED = 0,
+ /* sent CONNECT message to other peer, waiting for CONNECT_ACK */
+ S_CONNECT_SENT = 1,
+ /* received CONNECT message to other peer, sending CONNECT_ACK */
+ S_CONNECT_RECV = 4,
+ /* sent CONNECT_ACK message to other peer, wait for ACK or payload */
+ S_CONNECT_RECV_ACK_SENT = 8,
+ /* received ACK or payload */
+ S_CONNECTED = 16,
+ /* Disconnect in progress */
+ S_DISCONNECT = 32
+};
/**
* Entry in neighbours.
struct GNUNET_BANDWIDTH_Tracker in_tracker;
/**
- * How often has the other peer (recently) violated the inbound
- * traffic limit? Incremented by 10 per violation, decremented by 1
- * per non-violation (for each time interval).
+ * Inbound bandwidth from ATS, activated when connection is up
*/
- unsigned int quota_violation_count;
+ struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in;
+
+ /**
+ * Inbound bandwidth from ATS, activated when connection is up
+ */
+ struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out;
+
+ /**
+ * Timestamp of the 'SESSION_CONNECT' message we got from the other peer
+ */
+ struct GNUNET_TIME_Absolute connect_ts;
/**
- * Number of values in 'ats' array.
+ * Timeout for ATS
+ * We asked ATS for a new address for this peer
*/
- //unsigned int ats_count;
+ GNUNET_SCHEDULER_TaskIdentifier ats_suggest;
/**
- * Are we already in the process of disconnecting this neighbour?
+ * Task the resets the peer state after due to an pending
+ * unsuccessful connection setup
+ */
+ GNUNET_SCHEDULER_TaskIdentifier state_reset;
+
+ /**
+ * How often has the other peer (recently) violated the inbound
+ * traffic limit? Incremented by 10 per violation, decremented by 1
+ * per non-violation (for each time interval).
*/
- int in_disconnect;
+ unsigned int quota_violation_count;
+
/**
- * Do we currently consider this neighbour connected? (as far as
- * the connect/disconnect callbacks are concerned)?
+ * The current state of the peer
+ * Element of enum State
*/
- int is_connected;
+ int state;
};
return GNUNET_CONTAINER_multihashmap_get (neighbours, &pid->hashPubKey);
}
+#define change_state(n, state, ...) change (n, state, __LINE__)
+
+static int
+is_connecting (struct NeighbourMapEntry *n)
+{
+ if ((n->state > S_NOT_CONNECTED) && (n->state < S_CONNECTED))
+ return GNUNET_YES;
+ return GNUNET_NO;
+}
+
+static int
+is_connected (struct NeighbourMapEntry *n)
+{
+ if (n->state == S_CONNECTED)
+ return GNUNET_YES;
+ return GNUNET_NO;
+}
+
+static int
+is_disconnecting (struct NeighbourMapEntry *n)
+{
+ if (n->state == S_DISCONNECT)
+ return GNUNET_YES;
+ return GNUNET_NO;
+}
+
+static const char *
+print_state (int state)
+{
+ switch (state)
+ {
+ case S_CONNECTED:
+ return "S_CONNECTED";
+ break;
+ case S_CONNECT_RECV:
+ return "S_CONNECT_RECV";
+ break;
+ case S_CONNECT_RECV_ACK_SENT:
+ return "S_CONNECT_RECV_ACK_SENT";
+ break;
+ case S_CONNECT_SENT:
+ return "S_CONNECT_SENT";
+ break;
+ case S_DISCONNECT:
+ return "S_DISCONNECT";
+ break;
+ case S_NOT_CONNECTED:
+ return "S_NOT_CONNECTED";
+ break;
+ default:
+ GNUNET_break (0);
+ break;
+ }
+ return NULL;
+}
+
+static int
+change (struct NeighbourMapEntry *n, int state, int line);
+
+static void
+ats_suggest_cancel (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
+
+static void
+reset_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct NeighbourMapEntry *n = cls;
+
+ n->state_reset = GNUNET_SCHEDULER_NO_TASK;
+
+#if DEBUG_TRANSPORT
+#endif
+ /* This jut a temporary debug message to check if a the value
+ * SETUP_CONNECTION_TIMEOUT was choosen to small for slow machines
+ */
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "Information for developers: Connection to peer `%s' %s failed in state `%s', resetting connection attempt \n",
+ GNUNET_i2s (&n->id), GST_plugins_a2s (n->plugin_name, n->addr,
+ n->addrlen),
+ print_state (n->state));
+
+ GNUNET_STATISTICS_update (GST_stats,
+ gettext_noop
+ ("# failed connection attempts due to timeout"), 1,
+ GNUNET_NO);
+
+ /* resetting state */
+ n->state = S_NOT_CONNECTED;
+
+ /* destroying address */
+ GNUNET_ATS_address_destroyed (GST_ats, &n->id, n->plugin_name, n->addr,
+ n->addrlen, NULL);
+
+ /* request new address */
+ if (n->ats_suggest != GNUNET_SCHEDULER_NO_TASK)
+ GNUNET_SCHEDULER_cancel (n->ats_suggest);
+ n->ats_suggest =
+ GNUNET_SCHEDULER_add_delayed (ATS_RESPONSE_TIMEOUT, ats_suggest_cancel,
+ n);
+ GNUNET_ATS_suggest_address (GST_ats, &n->id);
+}
+
+static int
+change (struct NeighbourMapEntry *n, int state, int line)
+{
+ char *old = strdup (print_state (n->state));
+ char *new = strdup (print_state (state));
+
+ /* allowed transitions */
+ int allowed = GNUNET_NO;
+
+ switch (n->state)
+ {
+ case S_NOT_CONNECTED:
+ if ((state == S_CONNECT_RECV) || (state == S_CONNECT_SENT) ||
+ (state == S_DISCONNECT))
+ {
+ allowed = GNUNET_YES;
+
+ /* Schedule reset task */
+ if ((state == S_CONNECT_RECV) || (state == S_CONNECT_SENT))
+ {
+ GNUNET_assert (n->state_reset == GNUNET_SCHEDULER_NO_TASK);
+ n->state_reset =
+ GNUNET_SCHEDULER_add_delayed (SETUP_CONNECTION_TIMEOUT, &reset_task,
+ n);
+ }
+ break;
+ }
+ break;
+ case S_CONNECT_RECV:
+ if ((state == S_NOT_CONNECTED) || (state == S_DISCONNECT) ||
+ (state == S_CONNECTED) ||
+ /* FIXME SENT -> RECV ISSUE! */ (state == S_CONNECT_SENT))
+ {
+ if ((state == S_CONNECTED) || (state == S_DISCONNECT) ||
+ (state == S_NOT_CONNECTED))
+ {
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Removed reset task for peer `%s' %s failed in state transition `%s' -> `%s' \n",
+ GNUNET_i2s (&n->id), GST_plugins_a2s (n->plugin_name,
+ n->addr, n->addrlen),
+ print_state (n->state), print_state (state));
+#endif
+ GNUNET_assert (n->state_reset != GNUNET_SCHEDULER_NO_TASK);
+ GNUNET_SCHEDULER_cancel (n->state_reset);
+ n->state_reset = GNUNET_SCHEDULER_NO_TASK;
+ }
+
+ allowed = GNUNET_YES;
+ break;
+ }
+ break;
+ case S_CONNECT_SENT:
+ if ((state == S_NOT_CONNECTED) || (state == S_CONNECTED) ||
+ (state == S_DISCONNECT) ||
+ /* FIXME SENT -> RECV ISSUE! */ (state == S_CONNECT_RECV))
+ {
+ if ((state == S_CONNECTED) || (state == S_DISCONNECT) ||
+ (state == S_NOT_CONNECTED))
+ {
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Removed reset task for peer `%s' %s failed in state transition `%s' -> `%s' \n",
+ GNUNET_i2s (&n->id), GST_plugins_a2s (n->plugin_name,
+ n->addr, n->addrlen),
+ print_state (n->state), print_state (state));
+#endif
+ GNUNET_assert (n->state_reset != GNUNET_SCHEDULER_NO_TASK);
+ GNUNET_SCHEDULER_cancel (n->state_reset);
+ n->state_reset = GNUNET_SCHEDULER_NO_TASK;
+ }
+
+ allowed = GNUNET_YES;
+ break;
+ }
+ break;
+ case S_CONNECTED:
+ if (state == S_DISCONNECT)
+ {
+ allowed = GNUNET_YES;
+ break;
+ }
+ break;
+ case S_DISCONNECT:
+ /*
+ * if (state == S_NOT_CONNECTED)
+ * {
+ * allowed = GNUNET_YES;
+ * break;
+ * } */
+ break;
+ default:
+ GNUNET_break (0);
+ break;
+
+ }
+
+ if (allowed == GNUNET_NO)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Illegal state transition from `%s' to `%s' in line %u \n", old,
+ new, line);
+ GNUNET_break (0);
+ GNUNET_free (old);
+ GNUNET_free (new);
+ return GNUNET_SYSERR;
+ }
+
+ n->state = state;
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "State for neighbour `%s' %X changed from `%s' to `%s' in line %u\n",
+ GNUNET_i2s (&n->id), n, old, new, line);
+#endif
+ GNUNET_free (old);
+ GNUNET_free (new);
+ return GNUNET_OK;
+}
+
+static ssize_t
+send_with_plugin (const struct GNUNET_PeerIdentity *target, const char *msgbuf,
+ size_t msgbuf_size, uint32_t priority,
+ struct GNUNET_TIME_Relative timeout, struct Session *session,
+ const char *plugin_name, const void *addr, size_t addrlen,
+ int force_address, GNUNET_TRANSPORT_TransmitContinuation cont,
+ void *cont_cls)
+{
+ struct GNUNET_TRANSPORT_PluginFunctions *papi;
+ size_t ret = GNUNET_SYSERR;
+
+ /* FIXME : ats returns an address with all values 0 */
+ if (plugin_name == NULL)
+ {
+ if (cont != NULL)
+ cont (cont_cls, target, GNUNET_SYSERR);
+ return GNUNET_SYSERR;
+ }
+
+ if ((session == NULL) && (addr == NULL) && (addrlen == 0))
+ {
+ if (cont != NULL)
+ cont (cont_cls, target, GNUNET_SYSERR);
+ return GNUNET_SYSERR;
+ }
+
+ papi = GST_plugins_find (plugin_name);
+ if (papi == NULL)
+ {
+ if (cont != NULL)
+ cont (cont_cls, target, GNUNET_SYSERR);
+ return GNUNET_SYSERR;
+ }
+
+ ret =
+ papi->send (papi->cls, target, msgbuf, msgbuf_size, 0, timeout, session,
+ addr, addrlen, GNUNET_YES, cont, cont_cls);
+
+ if (ret == -1)
+ {
+ if (cont != NULL)
+ cont (cont_cls, target, GNUNET_SYSERR);
+ }
+ return ret;
+}
/**
* Task invoked to start a transmission to another peer.
{
GNUNET_assert (n->is_active == mq);
n->is_active = NULL;
- GNUNET_assert (n->transmission_task == GNUNET_SCHEDULER_NO_TASK);
- n->transmission_task = GNUNET_SCHEDULER_add_now (&transmission_task, n);
+ if (success == GNUNET_YES)
+ {
+ GNUNET_assert (n->transmission_task == GNUNET_SCHEDULER_NO_TASK);
+ n->transmission_task = GNUNET_SCHEDULER_add_now (&transmission_task, n);
+ }
}
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending message of type %u was %s\n",
+ ntohs (((struct GNUNET_MessageHeader *) mq->message_buf)->type),
+ (success == GNUNET_OK) ? "successful" : "FAILED");
+#endif
if (NULL != mq->cont)
mq->cont (mq->cont_cls, success);
GNUNET_free (mq);
struct MessageQueue *mq;
struct GNUNET_TIME_Relative timeout;
ssize_t ret;
- struct GNUNET_TRANSPORT_PluginFunctions *papi;
if (n->is_active != NULL)
+ {
+ GNUNET_break (0);
return; /* transmission already pending */
+ }
if (n->transmission_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_break (0);
return; /* currently waiting for bandwidth */
+ }
while (NULL != (mq = n->messages_head))
{
timeout = GNUNET_TIME_absolute_get_remaining (mq->timeout);
break;
GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
n->is_active = mq;
+ mq->n = n;
transmit_send_continuation (mq, &n->id, GNUNET_SYSERR); /* timeout */
}
if (NULL == mq)
return; /* no more messages */
- papi = GST_plugins_find (n->plugin_name);
- if (papi == NULL)
+ if (GST_plugins_find (n->plugin_name) == NULL)
{
GNUNET_break (0);
return;
n->is_active = mq;
mq->n = n;
- if (((n->session == NULL) && (n->addr == NULL) && (n->addrlen == 0)))
+ if ((n->session == NULL) && (n->addr == NULL) && (n->addrlen == 0))
{
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "No address peer for peer `%s'\n",
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "No address for peer `%s'\n",
GNUNET_i2s (&n->id));
transmit_send_continuation (mq, &n->id, GNUNET_SYSERR);
+ GNUNET_assert (n->transmission_task == GNUNET_SCHEDULER_NO_TASK);
n->transmission_task = GNUNET_SCHEDULER_add_now (&transmission_task, n);
return;
}
ret =
- papi->send (papi->cls, &n->id, mq->message_buf, mq->message_buf_size,
- 0 /* priority -- remove from plugin API? */ ,
- timeout, n->session, n->addr, n->addrlen, GNUNET_YES,
- &transmit_send_continuation, mq);
+ send_with_plugin (&n->id, mq->message_buf, mq->message_buf_size, 0,
+ timeout, n->session, n->plugin_name, n->addr,
+ n->addrlen, GNUNET_YES, &transmit_send_continuation,
+ mq);
if (ret == -1)
{
/* failure, but 'send' would not call continuation in this case,
* so we need to do it here! */
transmit_send_continuation (mq, &n->id, GNUNET_SYSERR);
- n->transmission_task = GNUNET_SCHEDULER_add_now (&transmission_task, n);
}
+
}
{
struct NeighbourMapEntry *n = cls;
+ GNUNET_assert (NULL != lookup_neighbour (&n->id));
n->transmission_task = GNUNET_SCHEDULER_NO_TASK;
try_transmission_to_peer (n);
}
}
+static void
+send_disconnect_cont (void *cls, const struct GNUNET_PeerIdentity *target,
+ int result)
+{
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending DISCONNECT message to peer `%4s': %i\n",
+ GNUNET_i2s (target), result);
+#endif
+}
+
+
+static int
+send_disconnect (const struct GNUNET_PeerIdentity *target,
+ const char *plugin_name, const char *sender_address,
+ uint16_t sender_address_len, struct Session *session)
+{
+ size_t ret;
+ struct SessionDisconnectMessage disconnect_msg;
+
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending DISCONNECT message to peer `%4s'\n",
+ GNUNET_i2s (target));
+#endif
+
+ disconnect_msg.header.size = htons (sizeof (struct SessionDisconnectMessage));
+ disconnect_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DISCONNECT);
+ disconnect_msg.reserved = htonl (0);
+ disconnect_msg.purpose.size =
+ htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
+ sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded) +
+ sizeof (struct GNUNET_TIME_AbsoluteNBO));
+ disconnect_msg.purpose.purpose =
+ htonl (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT);
+ disconnect_msg.timestamp =
+ GNUNET_TIME_absolute_hton (GNUNET_TIME_absolute_get ());
+ disconnect_msg.public_key = GST_my_public_key;
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_CRYPTO_rsa_sign (GST_my_private_key,
+ &disconnect_msg.purpose,
+ &disconnect_msg.signature));
+
+ ret =
+ send_with_plugin (target, (const char *) &disconnect_msg,
+ sizeof (disconnect_msg), UINT32_MAX,
+ GNUNET_TIME_UNIT_FOREVER_REL, session, plugin_name,
+ sender_address, sender_address_len, GNUNET_YES,
+ &send_disconnect_cont, NULL);
+
+ if (ret == GNUNET_SYSERR)
+ return GNUNET_SYSERR;
+
+ GNUNET_STATISTICS_update (GST_stats,
+ gettext_noop
+ ("# peers disconnected due to external request"), 1,
+ GNUNET_NO);
+ return GNUNET_OK;
+}
+
/**
* Disconnect from the given neighbour, clean up the record.
*
disconnect_neighbour (struct NeighbourMapEntry *n)
{
struct MessageQueue *mq;
+ int was_connected = is_connected (n);
+
+ /* send DISCONNECT MESSAGE */
+ if (is_connected (n) || is_connecting (n))
+ {
+ if (GNUNET_OK ==
+ send_disconnect (&n->id, n->plugin_name, n->addr, n->addrlen,
+ n->session))
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sent DISCONNECT_MSG to `%s'\n",
+ GNUNET_i2s (&n->id));
+ else
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Could not send DISCONNECT_MSG to `%s'\n",
+ GNUNET_i2s (&n->id));
+ }
+
+ if (is_connected(n))
+ {
+ GNUNET_ATS_address_in_use (GST_ats, &n->id, n->plugin_name,
+ n->addr, n->addrlen, n->session, GNUNET_NO);
+ }
+
- if (GNUNET_YES == n->in_disconnect)
+ if (is_disconnecting (n))
return;
- n->in_disconnect = GNUNET_YES;
+ change_state (n, S_DISCONNECT);
+ GST_validation_set_address_use (&n->id,
+ n->plugin_name,
+ n->session,
+ n->addr,
+ n->addrlen,
+ GNUNET_NO);
+
+ if (n->plugin_name != NULL)
+ {
+ struct GNUNET_TRANSPORT_PluginFunctions *papi;
+ papi = GST_plugins_find (n->plugin_name);
+ if (papi != NULL)
+ papi->disconnect (papi->cls, &n->id);
+ }
+
while (NULL != (mq = n->messages_head))
{
GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
n->is_active->n = NULL;
n->is_active = NULL;
}
- if (GNUNET_YES == n->is_connected)
+ if (was_connected)
{
- n->is_connected = GNUNET_NO;
GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != n->keepalive_task);
GNUNET_SCHEDULER_cancel (n->keepalive_task);
- n->keepalive_task = GNUNET_SCHEDULER_NO_TASK;
+ n->keepalive_task = GNUNET_SCHEDULER_NO_TASK;
GNUNET_assert (neighbours_connected > 0);
neighbours_connected--;
GNUNET_STATISTICS_update (GST_stats, gettext_noop ("# peers connected"), -1,
GNUNET_assert (GNUNET_YES ==
GNUNET_CONTAINER_multihashmap_remove (neighbours,
&n->id.hashPubKey, n));
+ if (GNUNET_SCHEDULER_NO_TASK != n->ats_suggest)
+ {
+ GNUNET_SCHEDULER_cancel (n->ats_suggest);
+ n->ats_suggest = GNUNET_SCHEDULER_NO_TASK;
+ }
if (GNUNET_SCHEDULER_NO_TASK != n->timeout_task)
{
GNUNET_SCHEDULER_cancel (n->timeout_task);
n->addrlen = 0;
}
n->session = NULL;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Deleting peer `%4s', %X\n",
+ GNUNET_i2s (&n->id), n);
GNUNET_free (n);
}
struct NeighbourMapEntry *n = cls;
n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
- if (GNUNET_YES == n->is_connected)
- GNUNET_STATISTICS_update (GST_stats,
- gettext_noop ("# peers disconnected due to timeout"), 1,
+
+ GNUNET_STATISTICS_update (GST_stats,
+ gettext_noop
+ ("# peers disconnected due to timeout"), 1,
GNUNET_NO);
disconnect_neighbour (n);
}
*/
static void
neighbour_keepalive_task (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct NeighbourMapEntry *n = cls;
struct GNUNET_MessageHeader m;
- struct GNUNET_TRANSPORT_PluginFunctions *papi;
- n->keepalive_task = GNUNET_SCHEDULER_add_delayed (KEEPALIVE_FREQUENCY,
- &neighbour_keepalive_task,
- n);
- GNUNET_assert (GNUNET_YES == n->is_connected);
- GNUNET_STATISTICS_update (GST_stats,
- gettext_noop ("# keepalives sent"), 1,
- GNUNET_NO);
+ n->keepalive_task =
+ GNUNET_SCHEDULER_add_delayed (KEEPALIVE_FREQUENCY,
+ &neighbour_keepalive_task, n);
+ GNUNET_assert (is_connected (n));
+ GNUNET_STATISTICS_update (GST_stats, gettext_noop ("# keepalives sent"), 1,
+ GNUNET_NO);
m.size = htons (sizeof (struct GNUNET_MessageHeader));
m.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE);
- papi = GST_plugins_find (n->plugin_name);
- if (papi != NULL)
- papi->send (papi->cls,
- &n->id, (const void *) &m,
- sizeof (m),
- UINT32_MAX /* priority */ ,
- GNUNET_TIME_UNIT_FOREVER_REL, n->session, n->addr, n->addrlen,
- GNUNET_YES, NULL, NULL);
+
+ send_with_plugin (&n->id, (const void *) &m, sizeof (m),
+ UINT32_MAX /* priority */ ,
+ GNUNET_TIME_UNIT_FOREVER_REL, n->session, n->plugin_name,
+ n->addr, n->addrlen, GNUNET_YES, NULL, NULL);
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Disconnecting peer `%4s', %s\n",
GNUNET_i2s (&n->id), "SHUTDOWN_TASK");
#endif
- if (GNUNET_YES == n->is_connected)
+ if (is_connected (n))
GNUNET_STATISTICS_update (GST_stats,
- gettext_noop ("# peers disconnected due to global disconnect"), 1,
- GNUNET_NO);
+ gettext_noop
+ ("# peers disconnected due to global disconnect"),
+ 1, GNUNET_NO);
disconnect_neighbour (n);
return GNUNET_OK;
}
+static void
+ats_suggest_cancel (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct NeighbourMapEntry *n = cls;
+
+ n->ats_suggest = GNUNET_SCHEDULER_NO_TASK;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " ATS did not suggested address to connect to peer `%s'\n",
+ GNUNET_i2s (&n->id));
+
+ disconnect_neighbour (n);
+}
+
/**
* Cleanup the neighbours subsystem.
*/
void
GST_neighbours_stop ()
{
- GNUNET_assert (neighbours != NULL);
+ // This can happen during shutdown
+ if (neighbours == NULL)
+ {
+ return;
+ }
GNUNET_CONTAINER_multihashmap_iterate (neighbours, &disconnect_all_neighbours,
NULL);
/**
- * For an existing neighbour record, set the active connection to
- * the given address.
+ * We tried to send a SESSION_CONNECT message to another peer. If this
+ * succeeded, we change the state. If it failed, we should tell
+ * ATS to not use this address anymore (until it is re-validated).
*
- * @param peer identity of the peer to switch the address for
- * @param plugin_name name of transport that delivered the PONG
- * @param address address of the other peer, NULL if other peer
- * connected to us
- * @param address_len number of bytes in address
- * @param session session to use (or NULL)
- * @param ats performance data
- * @param ats_count number of entries in ats (excluding 0-termination)
+ * @param cls the 'struct NeighbourMapEntry'
+ * @param success GNUNET_OK on success
*/
-void
-GST_neighbours_switch_to_address (const struct GNUNET_PeerIdentity *peer,
- const char *plugin_name, const void *address,
- size_t address_len, struct Session *session,
- const struct GNUNET_ATS_Information
- *ats, uint32_t ats_count)
+static void
+send_connect_continuation (void *cls, const struct GNUNET_PeerIdentity *target,
+ int success)
{
- struct NeighbourMapEntry *n;
- struct SessionConnectMessage connect_msg;
- int was_connected;
+ struct NeighbourMapEntry *n = cls;
- GNUNET_assert (neighbours != NULL);
- n = lookup_neighbour (peer);
- if (NULL == n)
- {
- /* FIXME: ATS not fully implemented, once ATS only generates
- these events for 'connected' addresses, things should be better... */
- // GNUNET_break (0);
- return;
- }
- was_connected = n->is_connected;
- n->is_connected = GNUNET_YES;
- if (GNUNET_YES != was_connected)
- n->keepalive_task = GNUNET_SCHEDULER_add_now (&neighbour_keepalive_task,
- n);
+ GNUNET_assert (n != NULL);
+ GNUNET_assert (!is_connected (n));
+ if (is_disconnecting (n))
+ return; /* neighbour is going away */
+
+ if (GNUNET_YES != success)
+ {
#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "SWITCH! Peer `%4s' switches to plugin `%s' address '%s' session %X\n",
- GNUNET_i2s (peer), plugin_name,
- (address_len == 0) ? "<inbound>" : GST_plugins_a2s (plugin_name,
- address,
- address_len),
- session);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Failed to send CONNECT_MSG to peer `%4s' with plugin `%s' address '%s' session %X, asking ATS for new address \n",
+ GNUNET_i2s (&n->id), n->plugin_name,
+ (n->addrlen ==
+ 0) ? "<inbound>" : GST_plugins_a2s (n->plugin_name, n->addr,
+ n->addrlen), n->session);
#endif
- GNUNET_free_non_null (n->addr);
- n->addr = GNUNET_malloc (address_len);
- memcpy (n->addr, address, address_len);
- n->addrlen = address_len;
- n->session = session;
- GNUNET_free_non_null (n->plugin_name);
- n->plugin_name = GNUNET_strdup (plugin_name);
- GNUNET_SCHEDULER_cancel (n->timeout_task);
- n->timeout_task =
- GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
- &neighbour_timeout_task, n);
- connect_msg.header.size = htons (sizeof (struct SessionConnectMessage));
- connect_msg.header.type =
- htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT);
- connect_msg.reserved = htonl (0);
- connect_msg.timestamp =
- GNUNET_TIME_absolute_hton (GNUNET_TIME_absolute_get ());
- GST_neighbours_send (peer, &connect_msg, sizeof (connect_msg),
- GNUNET_TIME_UNIT_FOREVER_REL, NULL, NULL);
+ GNUNET_ATS_address_destroyed (GST_ats, &n->id, n->plugin_name, n->addr,
+ n->addrlen, NULL);
+
+ change_state (n, S_NOT_CONNECTED);
- if (GNUNET_YES == was_connected)
+ if (n->ats_suggest != GNUNET_SCHEDULER_NO_TASK)
+ GNUNET_SCHEDULER_cancel (n->ats_suggest);
+ n->ats_suggest =
+ GNUNET_SCHEDULER_add_delayed (ATS_RESPONSE_TIMEOUT, ats_suggest_cancel,
+ n);
+ GNUNET_ATS_suggest_address (GST_ats, &n->id);
return;
- /* First tell clients about connected neighbours...*/
- neighbours_connected++;
- GNUNET_STATISTICS_update (GST_stats, gettext_noop ("# peers connected"), 1,
- GNUNET_NO);
- connect_notify_cb (callback_cls, peer, ats, ats_count);
+ }
+
+
}
+
/**
- * Try to create a connection to the given target (eventually).
+ * We tried to switch addresses with an peer already connected. If it failed,
+ * we should tell ATS to not use this address anymore (until it is re-validated).
+ *
+ * @param cls the 'struct NeighbourMapEntry'
+ * @param success GNUNET_OK on success
+ */
+static void
+send_switch_address_continuation (void *cls,
+ const struct GNUNET_PeerIdentity *target,
+ int success)
+{
+ struct NeighbourMapEntry *n = cls;
+
+ GNUNET_assert (n != NULL);
+ if (is_disconnecting (n))
+ return; /* neighbour is going away */
+
+ GNUNET_assert (n->state == S_CONNECTED);
+ if (GNUNET_YES != success)
+ {
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Failed to switch connected peer `%s' to plugin `%s' address '%s' session %X, asking ATS for new address \n",
+ GNUNET_i2s (&n->id), n->plugin_name,
+ (n->addrlen ==
+ 0) ? "<inbound>" : GST_plugins_a2s (n->plugin_name, n->addr,
+ n->addrlen), n->session);
+#endif
+
+ GNUNET_ATS_address_destroyed (GST_ats, &n->id, n->plugin_name, n->addr,
+ n->addrlen, NULL);
+
+ if (n->ats_suggest != GNUNET_SCHEDULER_NO_TASK)
+ GNUNET_SCHEDULER_cancel (n->ats_suggest);
+ n->ats_suggest =
+ GNUNET_SCHEDULER_add_delayed (ATS_RESPONSE_TIMEOUT, ats_suggest_cancel,
+ n);
+ GNUNET_ATS_suggest_address (GST_ats, &n->id);
+ return;
+ }
+ /* Tell ATS that switching addresses was successful */
+ GNUNET_ATS_address_in_use (GST_ats, &n->id, n->plugin_name, n->addr,
+ n->addrlen, n->addr, GNUNET_YES);
+}
+
+/**
+ * We tried to send a SESSION_CONNECT message to another peer. If this
+ * succeeded, we change the state. If it failed, we should tell
+ * ATS to not use this address anymore (until it is re-validated).
+ *
+ * @param cls the 'struct NeighbourMapEntry'
+ * @param success GNUNET_OK on success
+ */
+static void
+send_connect_ack_continuation (void *cls,
+ const struct GNUNET_PeerIdentity *target,
+ int success)
+{
+ struct NeighbourMapEntry *n = cls;
+
+ GNUNET_assert (n != NULL);
+
+ if (GNUNET_YES == success)
+ return; /* sending successful */
+
+ /* sending failed, ask for next address */
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Failed to send CONNECT_MSG to peer `%4s' with plugin `%s' address '%s' session %X, asking ATS for new address \n",
+ GNUNET_i2s (&n->id), n->plugin_name,
+ (n->addrlen == 0) ? "<inbound>" : GST_plugins_a2s (n->plugin_name,
+ n->addr,
+ n->addrlen),
+ n->session);
+#endif
+ change_state (n, S_NOT_CONNECTED);
+
+ GNUNET_ATS_address_destroyed (GST_ats, &n->id, n->plugin_name, n->addr,
+ n->addrlen, NULL);
+
+ if (n->ats_suggest != GNUNET_SCHEDULER_NO_TASK)
+ GNUNET_SCHEDULER_cancel (n->ats_suggest);
+ n->ats_suggest =
+ GNUNET_SCHEDULER_add_delayed (ATS_RESPONSE_TIMEOUT, ats_suggest_cancel,
+ n);
+ GNUNET_ATS_suggest_address (GST_ats, &n->id);
+}
+
+/**
+ * For an existing neighbour record, set the active connection to
+ * the given address.
+ *
+ * @param peer identity of the peer to switch the address for
+ * @param plugin_name name of transport that delivered the PONG
+ * @param address address of the other peer, NULL if other peer
+ * connected to us
+ * @param address_len number of bytes in address
+ * @param session session to use (or NULL)
+ * @param ats performance data
+ * @param ats_count number of entries in ats
+ * @return GNUNET_YES if we are currently connected, GNUNET_NO if the
+ * connection is not up (yet)
+ */
+int
+GST_neighbours_switch_to_address_3way (const struct GNUNET_PeerIdentity *peer,
+ const char *plugin_name,
+ const void *address, size_t address_len,
+ struct Session *session,
+ const struct GNUNET_ATS_Information *ats,
+ uint32_t ats_count,
+ struct GNUNET_BANDWIDTH_Value32NBO
+ bandwidth_in,
+ struct GNUNET_BANDWIDTH_Value32NBO
+ bandwidth_out)
+{
+ struct NeighbourMapEntry *n;
+ struct SessionConnectMessage connect_msg;
+ size_t msg_len;
+ size_t ret;
+ int checks_failed;
+
+ // This can happen during shutdown
+ if (neighbours == NULL)
+ {
+ return GNUNET_NO;
+ }
+
+ checks_failed = GNUNET_NO;
+
+ if (plugin_name == NULL)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "ATS offered suggested us empty address: plugin NULL");
+ GNUNET_break_op (0);
+ checks_failed = GNUNET_YES;
+ }
+ if ((address == NULL) && (address_len == 0) && (session == NULL))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "ATS offered suggested us empty address: address NULL & session NULL");
+ GNUNET_break_op (0);
+ checks_failed = GNUNET_YES;
+ }
+
+ n = lookup_neighbour (peer);
+ if (NULL == n)
+ checks_failed = GNUNET_YES;
+
+ if (checks_failed == GNUNET_YES)
+ {
+ GNUNET_ATS_address_destroyed (GST_ats, peer, plugin_name, address,
+ address_len, session);
+ if (n != NULL)
+ GNUNET_ATS_suggest_address (GST_ats, peer);
+ return GNUNET_NO;
+ }
+
+ /* checks successful and neighbour != NULL */
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "ATS tells us to switch to plugin `%s' address '%s' session %X for %s peer `%s'\n",
+ plugin_name,
+ (address_len == 0) ? "<inbound>" : GST_plugins_a2s (plugin_name,
+ address,
+ address_len),
+ session, (is_connected (n) ? "CONNECTED" : "NOT CONNECTED"),
+ GNUNET_i2s (peer));
+#endif
+
+ if (n->ats_suggest != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (n->ats_suggest);
+ n->ats_suggest = GNUNET_SCHEDULER_NO_TASK;
+ }
+
+ // do not switch addresses just update quotas
+ if ((is_connected (n)) && (address_len == n->addrlen))
+ {
+ if ((0 == memcmp (address, n->addr, address_len)) &&
+ (n->session == session))
+ {
+ struct QuotaSetMessage q_msg;
+
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending outbound quota of %u Bps and inbound quota of %u Bps for peer `%s' to all clients\n",
+ ntohl (n->bandwidth_out.value__),
+ ntohl (n->bandwidth_in.value__), GNUNET_i2s (peer));
+#endif
+
+ n->bandwidth_in = bandwidth_in;
+ n->bandwidth_out = bandwidth_out;
+ GST_neighbours_set_incoming_quota (&n->id, n->bandwidth_in);
+
+ q_msg.header.size = htons (sizeof (struct QuotaSetMessage));
+ q_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA);
+ q_msg.quota = n->bandwidth_out;
+ q_msg.peer = (*peer);
+ GST_clients_broadcast (&q_msg.header, GNUNET_NO);
+ return GNUNET_NO;
+ }
+ }
+ if (n->state == S_CONNECTED)
+ GST_validation_set_address_use (&n->id,
+ n->plugin_name,
+ n->session,
+ n->addr,
+ n->addrlen,
+ GNUNET_NO);
+ /* This will be a connection switch, tell ATS about it */
+ if (n->state == S_CONNECTED)
+ {
+ GNUNET_ATS_address_in_use (GST_ats, &n->id, n->plugin_name, n->addr,
+ n->addrlen, n->addr, GNUNET_NO);
+ }
+
+ /* set new address */
+ GNUNET_free_non_null (n->addr);
+ n->addr = GNUNET_malloc (address_len);
+ memcpy (n->addr, address, address_len);
+ n->bandwidth_in = bandwidth_in;
+ n->bandwidth_out = bandwidth_out;
+ n->addrlen = address_len;
+ n->session = session;
+ GNUNET_free_non_null (n->plugin_name);
+ n->plugin_name = GNUNET_strdup (plugin_name);
+ GNUNET_SCHEDULER_cancel (n->timeout_task);
+ n->timeout_task =
+ GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
+ &neighbour_timeout_task, n);
+ if (n->state == S_CONNECTED)
+ GST_validation_set_address_use (&n->id,
+ n->plugin_name,
+ n->session,
+ n->addr,
+ n->addrlen,
+ GNUNET_YES);
+
+
+ if (n->state == S_DISCONNECT)
+ {
+ /* We are disconnecting, nothing to do here */
+ return GNUNET_NO;
+ }
+ /* We are not connected/connecting and initiate a fresh connect */
+ if (n->state == S_NOT_CONNECTED)
+ {
+ msg_len = sizeof (struct SessionConnectMessage);
+ connect_msg.header.size = htons (msg_len);
+ connect_msg.header.type =
+ htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT);
+ connect_msg.reserved = htonl (0);
+ connect_msg.timestamp =
+ GNUNET_TIME_absolute_hton (GNUNET_TIME_absolute_get ());
+
+ change_state (n, S_CONNECT_SENT);
+
+ ret =
+ send_with_plugin (peer, (const char *) &connect_msg, msg_len,
+ UINT32_MAX, GNUNET_TIME_UNIT_FOREVER_REL, session,
+ plugin_name, address, address_len, GNUNET_YES,
+ &send_connect_continuation, n);
+
+
+ return GNUNET_NO;
+ }
+ /* We received a CONNECT message and asked ATS for an address */
+ else if (n->state == S_CONNECT_RECV)
+ {
+ msg_len = sizeof (struct SessionConnectMessage);
+ connect_msg.header.size = htons (msg_len);
+ connect_msg.header.type =
+ htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT_ACK);
+ connect_msg.reserved = htonl (0);
+ connect_msg.timestamp =
+ GNUNET_TIME_absolute_hton (GNUNET_TIME_absolute_get ());
+
+ ret =
+ send_with_plugin (&n->id, (const void *) &connect_msg, msg_len,
+ UINT32_MAX, GNUNET_TIME_UNIT_FOREVER_REL, session,
+ plugin_name, address, address_len, GNUNET_YES,
+ &send_connect_ack_continuation, n);
+ return GNUNET_NO;
+ }
+ /* connected peer is switching addresses */
+ else if (n->state == S_CONNECTED)
+ {
+ msg_len = sizeof (struct SessionConnectMessage);
+ connect_msg.header.size = htons (msg_len);
+ connect_msg.header.type =
+ htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT);
+ connect_msg.reserved = htonl (0);
+ connect_msg.timestamp =
+ GNUNET_TIME_absolute_hton (GNUNET_TIME_absolute_get ());
+
+ ret =
+ send_with_plugin (peer, (const char *) &connect_msg, msg_len,
+ UINT32_MAX, GNUNET_TIME_UNIT_FOREVER_REL, session,
+ plugin_name, address, address_len, GNUNET_YES,
+ &send_switch_address_continuation, n);
+ if (ret == GNUNET_SYSERR)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Failed to send CONNECT_MESSAGE to `%4s' using plugin `%s' address '%s' session %X\n",
+ GNUNET_i2s (peer), plugin_name,
+ (address_len ==
+ 0) ? "<inbound>" : GST_plugins_a2s (plugin_name, address,
+ address_len), session);
+ }
+ return GNUNET_NO;
+ }
+ else if (n->state == S_CONNECT_SENT)
+ {
+ return GNUNET_NO;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Invalid connection state to switch addresses %u \n", n->state);
+ GNUNET_break_op (0);
+ return GNUNET_NO;
+}
+
+
+/**
+ * Obtain current latency information for the given neighbour.
+ *
+ * @param peer
+ * @return observed latency of the address, FOREVER if the address was
+ * never successfully validated
+ */
+struct GNUNET_TIME_Relative
+GST_neighbour_get_latency (const struct GNUNET_PeerIdentity *peer)
+{
+ struct NeighbourMapEntry *n;
+
+ n = lookup_neighbour (peer);
+ if (NULL == n)
+ return GNUNET_TIME_UNIT_FOREVER_REL;
+ return GST_validation_get_address_latency (peer,
+ n->plugin_name,
+ n->session,
+ n->addr,
+ n->addrlen);
+}
+
+
+/**
+ * Create an entry in the neighbour map for the given peer
+ *
+ * @param peer peer to create an entry for
+ * @return new neighbour map entry
+ */
+static struct NeighbourMapEntry *
+setup_neighbour (const struct GNUNET_PeerIdentity *peer)
+{
+ struct NeighbourMapEntry *n;
+
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Unknown peer `%s', creating new neighbour\n", GNUNET_i2s (peer));
+#endif
+ n = GNUNET_malloc (sizeof (struct NeighbourMapEntry));
+ n->id = *peer;
+ n->state = S_NOT_CONNECTED;
+ GNUNET_BANDWIDTH_tracker_init (&n->in_tracker,
+ GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT,
+ MAX_BANDWIDTH_CARRY_S);
+ n->timeout_task =
+ GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
+ &neighbour_timeout_task, n);
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_CONTAINER_multihashmap_put (neighbours,
+ &n->id.hashPubKey, n,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
+ return n;
+}
+
+
+/**
+ * Try to create a connection to the given target (eventually).
*
* @param target peer to try to connect to
*/
{
struct NeighbourMapEntry *n;
- GNUNET_assert (neighbours != NULL);
-
+ // This can happen during shutdown
+ if (neighbours == NULL)
+ {
+ return;
+ }
#if DEBUG_TRANSPORT
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Trying to connect to peer `%s'\n",
GNUNET_i2s (target));
#endif
-
- GNUNET_assert (0 !=
- memcmp (target, &GST_my_identity,
- sizeof (struct GNUNET_PeerIdentity)));
+ if (0 ==
+ memcmp (target, &GST_my_identity, sizeof (struct GNUNET_PeerIdentity)))
+ {
+ /* my own hello */
+ return;
+ }
n = lookup_neighbour (target);
- if ((NULL != n) && (GNUNET_YES == n->is_connected))
- return; /* already connected */
- if (n == NULL)
+
+ if (NULL != n)
{
-#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Unknown peer `%s', creating new neighbour\n",
- GNUNET_i2s (target));
-#endif
- n = GNUNET_malloc (sizeof (struct NeighbourMapEntry));
- n->id = *target;
- GNUNET_BANDWIDTH_tracker_init (&n->in_tracker,
- GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT,
- MAX_BANDWIDTH_CARRY_S);
- n->timeout_task =
- GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
- &neighbour_timeout_task, n);
- GNUNET_assert (GNUNET_OK ==
- GNUNET_CONTAINER_multihashmap_put (neighbours,
- &n->id.hashPubKey, n,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
+ if ((is_connected (n)) || (is_connecting (n)))
+ return; /* already connecting or connected */
+ if (is_disconnecting (n))
+ change_state (n, S_NOT_CONNECTED);
}
+
+
+ if (n == NULL)
+ n = setup_neighbour (target);
#if DEBUG_TRANSPORT
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Asking ATS for suggested address to connect to peer `%s'\n",
- GNUNET_i2s (target));
+ GNUNET_i2s (&n->id));
#endif
- GNUNET_ATS_suggest_address (GST_ats, target);
-}
+ GNUNET_ATS_suggest_address (GST_ats, &n->id);
+}
/**
* Test if we're connected to the given peer.
{
struct NeighbourMapEntry *n;
- GNUNET_assert (neighbours != NULL);
+ // This can happen during shutdown
+ if (neighbours == NULL)
+ {
+ return GNUNET_NO;
+ }
n = lookup_neighbour (target);
- if ((NULL == n) || (n->is_connected != GNUNET_YES))
+
+ if ((NULL == n) || (!is_connected (n)))
return GNUNET_NO; /* not connected */
return GNUNET_YES;
}
{
struct NeighbourMapEntry *n;
- GNUNET_assert (neighbours != NULL);
+ // This can happen during shutdown
+ if (neighbours == NULL)
+ {
+ return;
+ }
#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Session %X to peer `%s' ended \n",
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Session %X to peer `%s' ended \n",
session, GNUNET_i2s (peer));
#endif
n->addr = NULL;
n->addrlen = 0;
+ /* not connected anymore anyway, shouldn't matter */
+ if ((!is_connected (n)) && (!is_connecting (n)))
+ return;
- if (GNUNET_YES != n->is_connected)
- return; /* not connected anymore anyway, shouldn't matter */
-
- //n->is_connected = GNUNET_NO;
-
- /* fast disconnect unless ATS suggests a new address */
+ /* We are connected, so ask ATS to switch addresses */
GNUNET_SCHEDULER_cancel (n->timeout_task);
n->timeout_task =
GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_DISCONNECT_SESSION_TIMEOUT,
&neighbour_timeout_task, n);
/* try QUICKLY to re-establish a connection, reduce timeout! */
+ if (n->ats_suggest != GNUNET_SCHEDULER_NO_TASK)
+ GNUNET_SCHEDULER_cancel (n->ats_suggest);
+ n->ats_suggest =
+ GNUNET_SCHEDULER_add_delayed (ATS_RESPONSE_TIMEOUT, ats_suggest_cancel,
+ n);
GNUNET_ATS_suggest_address (GST_ats, peer);
}
struct NeighbourMapEntry *n;
struct MessageQueue *mq;
- GNUNET_assert (neighbours != NULL);
+ // This can happen during shutdown
+ if (neighbours == NULL)
+ {
+ return;
+ }
n = lookup_neighbour (target);
- if ((n == NULL) || (GNUNET_YES != n->is_connected))
+ if ((n == NULL) || (!is_connected (n)))
{
GNUNET_STATISTICS_update (GST_stats,
gettext_noop
#if DEBUG_TRANSPORT
if (n == NULL)
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Could not send message to peer `%s': unknown neighbor",
+ "Could not send message to peer `%s': unknown neighbour",
GNUNET_i2s (target));
- else if (GNUNET_YES != n->is_connected)
+ else if (!is_connected (n))
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Could not send message to peer `%s': not connected\n",
GNUNET_i2s (target));
return;
}
- if ((n->session == NULL) && (n->addr == NULL) && (n->addrlen ==0))
+ if ((n->session == NULL) && (n->addr == NULL) && (n->addrlen == 0))
{
GNUNET_STATISTICS_update (GST_stats,
gettext_noop
("# messages not sent (no such peer or not connected)"),
1, GNUNET_NO);
#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Could not send message to peer `%s': no address available\n",
- GNUNET_i2s (target));
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Could not send message to peer `%s': no address available\n",
+ GNUNET_i2s (target));
#endif
if (NULL != cont)
return;
}
-
GNUNET_assert (msg_size >= sizeof (struct GNUNET_MessageHeader));
GNUNET_STATISTICS_update (GST_stats,
gettext_noop
mq->message_buf_size = msg_size;
mq->timeout = GNUNET_TIME_relative_to_absolute (timeout);
GNUNET_CONTAINER_DLL_insert_tail (n->messages_head, n->messages_tail, mq);
+
if ((GNUNET_SCHEDULER_NO_TASK == n->transmission_task) &&
(NULL == n->is_active))
n->transmission_task = GNUNET_SCHEDULER_add_now (&transmission_task, n);
* @param sender sender of the message
* @param size size of the message
* @param do_forward set to GNUNET_YES if the message should be forwarded to clients
- * GNUNET_NO if the neighbour is not connected or violates the quota
+ * GNUNET_NO if the neighbour is not connected or violates the quota,
+ * GNUNET_SYSERR if the connection is not fully up yet
* @return how long to wait before reading more from this sender
*/
struct GNUNET_TIME_Relative
struct NeighbourMapEntry *n;
struct GNUNET_TIME_Relative ret;
- GNUNET_assert (neighbours != NULL);
+ // This can happen during shutdown
+ if (neighbours == NULL)
+ {
+ return GNUNET_TIME_UNIT_FOREVER_REL;
+ }
n = lookup_neighbour (sender);
if (n == NULL)
{
- *do_forward = GNUNET_NO;
+ GST_neighbours_try_connect (sender);
+ n = lookup_neighbour (sender);
+ if (NULL == n)
+ {
+ GNUNET_STATISTICS_update (GST_stats,
+ gettext_noop
+ ("# messages discarded due to lack of neighbour record"),
+ 1, GNUNET_NO);
+ *do_forward = GNUNET_NO;
+ return GNUNET_TIME_UNIT_ZERO;
+ }
+ }
+ if (!is_connected (n))
+ {
+ *do_forward = GNUNET_SYSERR;
return GNUNET_TIME_UNIT_ZERO;
}
if (GNUNET_YES == GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker, size))
return GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT;
}
*do_forward = GNUNET_YES;
- ret = GNUNET_BANDWIDTH_tracker_get_delay (&n->in_tracker, 0);
+ ret = GNUNET_BANDWIDTH_tracker_get_delay (&n->in_tracker, 32 * 1024);
if (ret.rel_value > 0)
{
#if DEBUG_TRANSPORT
{
struct NeighbourMapEntry *n;
- GNUNET_assert (neighbours != NULL);
+ // This can happen during shutdown
+ if (neighbours == NULL)
+ {
+ return;
+ }
n = lookup_neighbour (neighbour);
if (NULL == n)
{
struct NeighbourMapEntry *n;
- GNUNET_assert (neighbours != NULL);
+ // This can happen during shutdown
+ if (neighbours == NULL)
+ {
+ return;
+ }
n = lookup_neighbour (neighbour);
if (n == NULL)
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Disconnecting peer `%4s' due to `%s'\n",
GNUNET_i2s (&n->id), "SET_QUOTA");
#endif
- if (GNUNET_YES == n->is_connected)
+ if (is_connected (n))
GNUNET_STATISTICS_update (GST_stats,
- gettext_noop ("# disconnects due to quota of 0"), 1,
- GNUNET_NO);
+ gettext_noop ("# disconnects due to quota of 0"),
+ 1, GNUNET_NO);
disconnect_neighbour (n);
}
struct IteratorContext *ic = cls;
struct NeighbourMapEntry *n = value;
- if (GNUNET_YES != n->is_connected)
+ if (!is_connected (n))
return GNUNET_OK;
ic->cb (ic->cb_cls, &n->id, NULL, 0, n->plugin_name, n->addr, n->addrlen);
{
struct IteratorContext ic;
- GNUNET_assert (neighbours != NULL);
+ // This can happen during shutdown
+ if (neighbours == NULL)
+ {
+ return;
+ }
ic.cb = cb;
ic.cb_cls = cb_cls;
GNUNET_CONTAINER_multihashmap_iterate (neighbours, &neighbours_iterate, &ic);
}
-
/**
* If we have an active connection to the given target, it must be shutdown.
*
GST_neighbours_force_disconnect (const struct GNUNET_PeerIdentity *target)
{
struct NeighbourMapEntry *n;
- struct GNUNET_TRANSPORT_PluginFunctions *papi;
- struct SessionDisconnectMessage disconnect_msg;
- GNUNET_assert (neighbours != NULL);
+ // This can happen during shutdown
+ if (neighbours == NULL)
+ {
+ return;
+ }
n = lookup_neighbour (target);
if (NULL == n)
return; /* not active */
- if (GNUNET_YES == n->is_connected)
- {
- /* we're actually connected, send DISCONNECT message */
- disconnect_msg.header.size = htons (sizeof (struct SessionDisconnectMessage));
- disconnect_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DISCONNECT);
- disconnect_msg.reserved = htonl (0);
- disconnect_msg.purpose.size = htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
- sizeof (struct GNUNET_TIME_AbsoluteNBO));
- disconnect_msg.purpose.purpose = htonl (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT);
- disconnect_msg.timestamp = GNUNET_TIME_absolute_hton (GNUNET_TIME_absolute_get ());
- GNUNET_assert (GNUNET_OK ==
- GNUNET_CRYPTO_rsa_sign (GST_my_private_key,
- &disconnect_msg.purpose,
- &disconnect_msg.signature));
- papi = GST_plugins_find (n->plugin_name);
- if (papi != NULL)
- papi->send (papi->cls, target, (const void *) &disconnect_msg,
- sizeof (disconnect_msg),
- UINT32_MAX /* priority */ ,
- GNUNET_TIME_UNIT_FOREVER_REL, n->session, n->addr, n->addrlen,
- GNUNET_YES, NULL, NULL);
- GNUNET_STATISTICS_update (GST_stats,
- gettext_noop ("# peers disconnected due to external request"), 1,
- GNUNET_NO);
+ if (is_connected (n))
+ {
+ send_disconnect (&n->id, n->plugin_name, n->addr, n->addrlen, n->session);
+
+ n = lookup_neighbour (target);
+ if (NULL == n)
+ return; /* gone already */
}
disconnect_neighbour (n);
}
+/**
+ * We received a disconnect message from the given peer,
+ * validate and process.
+ *
+ * @param peer sender of the message
+ * @param msg the disconnect message
+ */
+void
+GST_neighbours_handle_disconnect_message (const struct GNUNET_PeerIdentity
+ *peer,
+ const struct GNUNET_MessageHeader
+ *msg)
+{
+ struct NeighbourMapEntry *n;
+ const struct SessionDisconnectMessage *sdm;
+ GNUNET_HashCode hc;
+
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received DISCONNECT message from peer `%s'\n",
+ GNUNET_i2s (peer));
+#endif
+
+ if (ntohs (msg->size) != sizeof (struct SessionDisconnectMessage))
+ {
+ // GNUNET_break_op (0);
+ GNUNET_STATISTICS_update (GST_stats,
+ gettext_noop
+ ("# disconnect messages ignored (old format)"), 1,
+ GNUNET_NO);
+ return;
+ }
+ sdm = (const struct SessionDisconnectMessage *) msg;
+ n = lookup_neighbour (peer);
+ if (NULL == n)
+ return; /* gone already */
+ if (GNUNET_TIME_absolute_ntoh (sdm->timestamp).abs_value <=
+ n->connect_ts.abs_value)
+ {
+ GNUNET_STATISTICS_update (GST_stats,
+ gettext_noop
+ ("# disconnect messages ignored (timestamp)"), 1,
+ GNUNET_NO);
+ return;
+ }
+ GNUNET_CRYPTO_hash (&sdm->public_key,
+ sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
+ &hc);
+ if (0 != memcmp (peer, &hc, sizeof (struct GNUNET_PeerIdentity)))
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+ if (ntohl (sdm->purpose.size) !=
+ sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
+ sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded) +
+ sizeof (struct GNUNET_TIME_AbsoluteNBO))
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+ if (GNUNET_OK !=
+ GNUNET_CRYPTO_rsa_verify
+ (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT, &sdm->purpose,
+ &sdm->signature, &sdm->public_key))
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+ GST_neighbours_force_disconnect (peer);
+}
+
+/**
+ * We received a 'SESSION_CONNECT_ACK' message from the other peer.
+ * Consider switching to it.
+ *
+ * @param message possibly a 'struct SessionConnectMessage' (check format)
+ * @param peer identity of the peer to switch the address for
+ * @param plugin_name name of transport that delivered the PONG
+ * @param address address of the other peer, NULL if other peer
+ * connected to us
+ * @param address_len number of bytes in address
+ * @param session session to use (or NULL)
+ * @param ats performance data
+ * @param ats_count number of entries in ats
+ */
+void
+GST_neighbours_handle_connect_ack (const struct GNUNET_MessageHeader *message,
+ const struct GNUNET_PeerIdentity *peer,
+ const char *plugin_name,
+ const char *sender_address,
+ uint16_t sender_address_len,
+ struct Session *session,
+ const struct GNUNET_ATS_Information *ats,
+ uint32_t ats_count)
+{
+ const struct SessionConnectMessage *scm;
+ struct QuotaSetMessage q_msg;
+ struct GNUNET_MessageHeader msg;
+ struct NeighbourMapEntry *n;
+ size_t msg_len;
+ size_t ret;
+ int was_connected;
+
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received CONNECT_ACK message from peer `%s'\n",
+ GNUNET_i2s (peer));
+#endif
+
+ if (ntohs (message->size) != sizeof (struct SessionConnectMessage))
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+
+ scm = (const struct SessionConnectMessage *) message;
+ GNUNET_break_op (ntohl (scm->reserved) == 0);
+ n = lookup_neighbour (peer);
+ if (NULL == n)
+ n = setup_neighbour (peer);
+
+ if (!is_connecting(n))
+ {
+ GNUNET_STATISTICS_update (GST_stats,
+ gettext_noop ("# unexpected CONNECT_ACK messages"), 1,
+ GNUNET_NO);
+ return;
+ }
+
+ if (NULL != session)
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
+ "transport-ats",
+ "Giving ATS session %p of plugin %s for peer %s\n",
+ session, plugin_name, GNUNET_i2s (peer));
+ GNUNET_ATS_address_update (GST_ats, peer, plugin_name, sender_address,
+ sender_address_len, session, ats, ats_count);
+
+ was_connected = is_connected (n);
+ if (!is_connected (n))
+ {
+ change_state (n, S_CONNECTED);
+ GST_validation_set_address_use (&n->id,
+ n->plugin_name,
+ n->session,
+ n->addr,
+ n->addrlen,
+ GNUNET_YES);
+ }
+
+ GNUNET_ATS_address_in_use (GST_ats, &n->id, n->plugin_name, n->addr,
+ n->addrlen, n->addr, GNUNET_YES);
+
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Setting inbound quota of %u for peer `%s' to \n",
+ ntohl (n->bandwidth_in.value__), GNUNET_i2s (&n->id));
+#endif
+ GST_neighbours_set_incoming_quota (&n->id, n->bandwidth_in);
+
+ /* send ACK (ACK) */
+ msg_len = sizeof (msg);
+ msg.size = htons (msg_len);
+ msg.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_ACK);
+
+ ret =
+ send_with_plugin (&n->id, (const char *) &msg, msg_len, UINT32_MAX,
+ GNUNET_TIME_UNIT_FOREVER_REL, n->session,
+ n->plugin_name, n->addr, n->addrlen, GNUNET_YES, NULL,
+ NULL);
+
+ if (ret == GNUNET_SYSERR)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Failed to send SESSION_ACK to `%4s' using plugin `%s' address '%s' session %X\n",
+ GNUNET_i2s (&n->id), n->plugin_name,
+ (n->addrlen ==
+ 0) ? "<inbound>" : GST_plugins_a2s (n->plugin_name, n->addr,
+ n->addrlen), n->session);
+
+
+ if (!was_connected)
+ {
+ if (n->keepalive_task == GNUNET_SCHEDULER_NO_TASK)
+ n->keepalive_task =
+ GNUNET_SCHEDULER_add_delayed (KEEPALIVE_FREQUENCY,
+ &neighbour_keepalive_task, n);
+
+ neighbours_connected++;
+ GNUNET_STATISTICS_update (GST_stats, gettext_noop ("# peers connected"), 1,
+ GNUNET_NO);
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Notify about connect of `%4s' using plugin `%s' address '%s' session %X LINE %u\n",
+ GNUNET_i2s (&n->id), n->plugin_name,
+ (n->addrlen ==
+ 0) ? "<inbound>" : GST_plugins_a2s (n->plugin_name, n->addr,
+ n->addrlen), n->session,
+ __LINE__);
+#endif
+ connect_notify_cb (callback_cls, &n->id, ats, ats_count);
+ }
+
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending outbound quota of %u Bps for peer `%s' to all clients\n",
+ ntohl (n->bandwidth_out.value__), GNUNET_i2s (peer));
+#endif
+ q_msg.header.size = htons (sizeof (struct QuotaSetMessage));
+ q_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA);
+ q_msg.quota = n->bandwidth_out;
+ q_msg.peer = (*peer);
+ GST_clients_broadcast (&q_msg.header, GNUNET_NO);
+
+}
+
+void
+GST_neighbours_handle_ack (const struct GNUNET_MessageHeader *message,
+ const struct GNUNET_PeerIdentity *peer,
+ const char *plugin_name, const char *sender_address,
+ uint16_t sender_address_len, struct Session *session,
+ const struct GNUNET_ATS_Information *ats,
+ uint32_t ats_count)
+{
+ struct NeighbourMapEntry *n;
+ struct QuotaSetMessage q_msg;
+ int was_connected;
+
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received ACK message from peer `%s'\n",
+ GNUNET_i2s (peer));
+#endif
+
+ if (ntohs (message->size) != sizeof (struct GNUNET_MessageHeader))
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+
+ n = lookup_neighbour (peer);
+ if (NULL == n)
+ {
+ send_disconnect (peer, plugin_name, sender_address, sender_address_len,
+ session);
+ GNUNET_break (0);
+ return;
+ }
+
+ if (is_connected (n))
+ return;
+
+ if (!is_connecting(n))
+ {
+ GNUNET_STATISTICS_update (GST_stats, gettext_noop ("# unexpected ACK messages"), 1,
+ GNUNET_NO);
+ return;
+ }
+
+ if (NULL != session)
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
+ "transport-ats",
+ "Giving ATS session %p of plugin %s for peer %s\n",
+ session, plugin_name, GNUNET_i2s (peer));
+ GNUNET_ATS_address_update (GST_ats, peer, plugin_name, sender_address,
+ sender_address_len, session, ats, ats_count);
+
+ was_connected = is_connected (n);
+ change_state (n, S_CONNECTED);
+
+ GNUNET_ATS_address_in_use (GST_ats, &n->id, n->plugin_name, n->addr,
+ n->addrlen, n->addr, GNUNET_YES);
+
+ GST_neighbours_set_incoming_quota (&n->id, n->bandwidth_in);
+
+ if (n->keepalive_task == GNUNET_SCHEDULER_NO_TASK)
+ n->keepalive_task =
+ GNUNET_SCHEDULER_add_delayed (KEEPALIVE_FREQUENCY,
+ &neighbour_keepalive_task, n);
+
+ if (!was_connected)
+ {
+ GST_validation_set_address_use (&n->id,
+ n->plugin_name,
+ n->session,
+ n->addr,
+ n->addrlen,
+ GNUNET_YES);
+ neighbours_connected++;
+ GNUNET_STATISTICS_update (GST_stats, gettext_noop ("# peers connected"), 1,
+ GNUNET_NO);
+
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Notify about connect of `%4s' using plugin `%s' address '%s' session %X LINE %u\n",
+ GNUNET_i2s (&n->id), n->plugin_name,
+ (n->addrlen ==
+ 0) ? "<inbound>" : GST_plugins_a2s (n->plugin_name, n->addr,
+ n->addrlen), n->session,
+ __LINE__);
+#endif
+ connect_notify_cb (callback_cls, &n->id, ats, ats_count);
+ }
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending outbound quota of %u Bps for peer `%s' to all clients\n",
+ ntohl (n->bandwidth_out.value__), GNUNET_i2s (peer));
+#endif
+ q_msg.header.size = htons (sizeof (struct QuotaSetMessage));
+ q_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA);
+ q_msg.quota = n->bandwidth_out;
+ q_msg.peer = (*peer);
+ GST_clients_broadcast (&q_msg.header, GNUNET_NO);
+}
+
+struct BlackListCheckContext
+{
+ struct GNUNET_ATS_Information *ats;
+
+ uint32_t ats_count;
+
+ struct Session *session;
+
+ char *sender_address;
+
+ uint16_t sender_address_len;
+
+ char *plugin_name;
+
+ struct GNUNET_TIME_Absolute ts;
+};
+
+
+static void
+handle_connect_blacklist_cont (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ int result)
+{
+ struct NeighbourMapEntry *n;
+ struct BlackListCheckContext *bcc = cls;
+
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Blacklist check due to CONNECT message: `%s'\n",
+ GNUNET_i2s (peer),
+ (result == GNUNET_OK) ? "ALLOWED" : "FORBIDDEN");
+#endif
+
+ /* not allowed */
+ if (GNUNET_OK != result)
+ {
+ GNUNET_free (bcc);
+ return;
+ }
+
+ n = lookup_neighbour (peer);
+ if (NULL == n)
+ n = setup_neighbour (peer);
+
+ if (bcc->ts.abs_value > n->connect_ts.abs_value)
+ {
+ if (NULL != bcc->session)
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
+ "transport-ats",
+ "Giving ATS session %p of plugin %s address `%s' for peer %s\n",
+ bcc->session, bcc->plugin_name,
+ GST_plugins_a2s (bcc->plugin_name, bcc->sender_address,
+ bcc->sender_address_len),
+ GNUNET_i2s (peer));
+ GNUNET_ATS_address_update (GST_ats, peer, bcc->plugin_name,
+ bcc->sender_address, bcc->sender_address_len,
+ bcc->session, bcc->ats, bcc->ats_count);
+ n->connect_ts = bcc->ts;
+ }
+
+ GNUNET_free (bcc);
+
+ if (n->state != S_CONNECT_RECV)
+ change_state (n, S_CONNECT_RECV);
+
+ /* Ask ATS for an address to connect via that address */
+ if (n->ats_suggest != GNUNET_SCHEDULER_NO_TASK)
+ GNUNET_SCHEDULER_cancel (n->ats_suggest);
+ n->ats_suggest =
+ GNUNET_SCHEDULER_add_delayed (ATS_RESPONSE_TIMEOUT, ats_suggest_cancel,
+ n);
+ GNUNET_ATS_suggest_address (GST_ats, peer);
+}
+
+/**
+ * We received a 'SESSION_CONNECT' message from the other peer.
+ * Consider switching to it.
+ *
+ * @param message possibly a 'struct SessionConnectMessage' (check format)
+ * @param peer identity of the peer to switch the address for
+ * @param plugin_name name of transport that delivered the PONG
+ * @param address address of the other peer, NULL if other peer
+ * connected to us
+ * @param address_len number of bytes in address
+ * @param session session to use (or NULL)
+ * @param ats performance data
+ * @param ats_count number of entries in ats (excluding 0-termination)
+ */
+void
+GST_neighbours_handle_connect (const struct GNUNET_MessageHeader *message,
+ const struct GNUNET_PeerIdentity *peer,
+ const char *plugin_name,
+ const char *sender_address,
+ uint16_t sender_address_len,
+ struct Session *session,
+ const struct GNUNET_ATS_Information *ats,
+ uint32_t ats_count)
+{
+ const struct SessionConnectMessage *scm;
+ struct NeighbourMapEntry *n;
+ struct BlackListCheckContext *bcc = NULL;
+
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received CONNECT message from peer `%s'\n", GNUNET_i2s (peer));
+#endif
+
+ if (ntohs (message->size) != sizeof (struct SessionConnectMessage))
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+
+ scm = (const struct SessionConnectMessage *) message;
+ GNUNET_break_op (ntohl (scm->reserved) == 0);
+
+ n = lookup_neighbour (peer);
+ if (n != NULL)
+ {
+ /* connected peer switches addresses */
+ if (is_connected (n))
+ {
+ GNUNET_ATS_address_update (GST_ats, peer, plugin_name, sender_address,
+ sender_address_len, session, ats, ats_count);
+ return;
+ }
+ }
+
+ /* we are not connected to this peer */
+ /* do blacklist check */
+ bcc =
+ GNUNET_malloc (sizeof (struct BlackListCheckContext) +
+ sizeof (struct GNUNET_ATS_Information) * (ats_count + 1) +
+ sender_address_len + strlen (plugin_name) + 1);
+
+ bcc->ts = GNUNET_TIME_absolute_ntoh (scm->timestamp);
+
+ bcc->ats_count = ats_count + 1;
+ bcc->sender_address_len = sender_address_len;
+ bcc->session = session;
+
+ bcc->ats = (struct GNUNET_ATS_Information *) &bcc[1];
+ memcpy (bcc->ats, ats, sizeof (struct GNUNET_ATS_Information) * ats_count);
+ bcc->ats[ats_count].type = htonl (GNUNET_ATS_QUALITY_NET_DELAY);
+ bcc->ats[ats_count].value = htonl ((uint32_t) GST_neighbour_get_latency (peer).rel_value);
+ bcc->sender_address = (char *) &bcc->ats[ats_count + 1];
+ memcpy (bcc->sender_address, sender_address, sender_address_len);
+
+ bcc->plugin_name = &bcc->sender_address[sender_address_len];
+ strcpy (bcc->plugin_name, plugin_name);
+
+ GST_blacklist_test_allowed (peer, plugin_name, handle_connect_blacklist_cont,
+ bcc);
+}
+
+
/* end of file gnunet-service-transport_neighbours.c */
projects / oweals / gnunet.git / blobdiff