* - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
* - partial disconnect reporting -- same as error reporting?
* - add vs create? change vs. keep-alive? same msg or different ones? -- thinking...
- * - speed requirement specification (change?) in mesh API -- API call
* - add ping message
* - relay corking down to core
* - set ttl relative to tree depth
+ * - Add data ACK count in path ACK
+ * - Make common GNUNET_MESH_Data header for unicast, to_orig, multicast
* TODO END
*/
#include "platform.h"
#include "mesh.h"
#include "mesh_protocol.h"
-#include "gnunet_dht_service.h"
#include "mesh_tunnel_tree.h"
+#include "block_mesh.h"
+#include "mesh_block_lib.h"
+#include "gnunet_dht_service.h"
+#include "gnunet_statistics_service.h"
+#include "gnunet_regex_lib.h"
-/* TODO: move into configuration file */
-#define REFRESH_PATH_TIME GNUNET_TIME_relative_multiply(\
- GNUNET_TIME_UNIT_SECONDS,\
- 300)
-#define APP_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
- GNUNET_TIME_UNIT_SECONDS,\
- 5)
-
-#define ID_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
- GNUNET_TIME_UNIT_SECONDS,\
- 5)
-
-#define UNACKNOWLEDGED_WAIT GNUNET_TIME_relative_multiply(\
- GNUNET_TIME_UNIT_SECONDS,\
- 2)
-#define DEFAULT_TTL 64
-
-/* TODO END */
+#define MESH_BLOOM_SIZE 128
-#define MESH_DEBUG_DHT GNUNET_YES
-#define MESH_DEBUG_CONNECTION GNUNET_NO
+#define MESH_DEBUG_DHT GNUNET_NO
+#define MESH_DEBUG_CONNECTION GNUNET_NO
+#define MESH_DEBUG_TIMING __LINUX__ && GNUNET_YES
#if MESH_DEBUG_CONNECTION
#define DEBUG_CONN(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
#define DEBUG_DHT(...)
#endif
+#if MESH_DEBUG_TIMING
+#include <time.h>
+double __sum;
+uint64_t __count;
+struct timespec __mesh_start;
+struct timespec __mesh_end;
+#define INTERVAL_START clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_start))
+#define INTERVAL_END \
+do {\
+ clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_end));\
+ double __diff = __mesh_end.tv_nsec - __mesh_start.tv_nsec;\
+ if (__diff < 0) __diff += 1000000000;\
+ __sum += __diff;\
+ __count++;\
+} while (0)
+#define INTERVAL_SHOW \
+if (0 < __count)\
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO, "AVG process time: %f ns\n", __sum/__count)
+#else
+#define INTERVAL_START
+#define INTERVAL_END
+#define INTERVAL_SHOW
+#endif
+
/******************************************************************************/
/************************ DATA STRUCTURES ****************************/
/******************************************************************************/
/** FWD declaration */
struct MeshPeerInfo;
+struct MeshClient;
/**
};
+/**
+ * Struct containing info about a queued transmission to this peer
+ */
+struct MeshPeerQueue
+{
+ /**
+ * DLL next
+ */
+ struct MeshPeerQueue *next;
+
+ /**
+ * DLL previous
+ */
+ struct MeshPeerQueue *prev;
+
+ /**
+ * Peer this transmission is directed to.
+ */
+ struct MeshPeerInfo *peer;
+
+ /**
+ * Tunnel this message belongs to.
+ */
+ struct MeshTunnel *tunnel;
+
+ /**
+ * Pointer to info stucture used as cls.
+ */
+ void *cls;
+
+ /**
+ * Type of message
+ */
+ uint16_t type;
+
+ /**
+ * Size of the message
+ */
+ size_t size;
+};
+
+
/**
* Struct containing all info possibly needed to build a package when called
* back by core.
/** Ultimate destination of the packet */
GNUNET_PEER_Id destination;
- /** Which handler was used to request the transmission */
- unsigned int handler_n;
-
/** Data descriptor */
struct MeshData* mesh_data;
};
*/
struct MeshPathInfo *dhtgetcls;
- /**
- * Handles to stop queued transmissions for this peer
- */
- struct GNUNET_CORE_TransmitHandle *core_transmit[CORE_QUEUE_SIZE];
-
- /**
- * Pointer to info stuctures used as cls for queued transmissions
- */
- void *infos[CORE_QUEUE_SIZE];
-
- /**
- * Type of message being in each transmission
- */
- uint16_t types[CORE_QUEUE_SIZE];
-
/**
* Array of tunnels this peer participates in
* (most probably a small amount, therefore not a hashmap)
* Number of tunnels this peers participates in
*/
unsigned int ntunnels;
-};
-
-
-/**
- * Data scheduled to transmit (to local client or remote peer)
- */
-struct MeshQueue
-{
- /**
- * Double linked list
- */
- struct MeshQueue *next;
- struct MeshQueue *prev;
-
- /**
- * Target of the data (NULL if target is client)
- */
- struct MeshPeerInfo *peer;
- /**
- * Client to send the data to (NULL if target is peer)
- */
- struct MeshClient *client;
+ /**
+ * Transmission queue to core DLL head
+ */
+ struct MeshPeerQueue *queue_head;
- /**
- * Size of the message to transmit
- */
- unsigned int size;
+ /**
+ * Transmission queue to core DLL tail
+ */
+ struct MeshPeerQueue *queue_tail;
- /**
- * How old is the data?
- */
- struct GNUNET_TIME_Absolute timestamp;
+ /**
+ * How many messages are in the queue to this peer.
+ */
+ unsigned int queue_n;
- /**
- * Data itself
- */
- struct GNUNET_MessageHeader *data;
+ /**
+ * Handle to for queued transmissions
+ */
+ struct GNUNET_CORE_TransmitHandle *core_transmit;
};
+
/**
* Globally unique tunnel identification (owner + number)
* DO NOT USE OVER THE NETWORK
};
-struct MeshClient; /* FWD declaration */
-
/**
* Struct containing all information regarding a tunnel
* For an intermediate node the improtant info used will be:
MESH_TunnelNumber local_tid_dest;
/**
- * ID of the last multicast packet seen/sent.
+ * Is the speed on the tunnel limited to the slowest peer?
+ */
+ int speed_min;
+
+ /**
+ * Is the tunnel bufferless (minimum latency)?
+ */
+ int nobuffer;
+
+ /**
+ * Packet ID of the last fwd packet seen (sent/retransmitted/received).
+ */
+ uint32_t fwd_pid;
+
+ /**
+ * Packet ID of the last bck packet sent (unique counter per hop).
+ */
+ uint32_t bck_pid;
+
+ /**
+ * SKIP value for this tunnel.
+ */
+ uint32_t skip;
+
+ /**
+ * MeshTunnelChildInfo of all children, indexed by GNUNET_PEER_Id.
+ * Contains the Flow Control info: FWD ACK value received,
+ * last BCK ACK sent, PID and SKIP values.
+ */
+ struct GNUNET_CONTAINER_MultiHashMap *children_fc;
+
+ /**
+ * Last ACK sent towards the origin (for traffic towards leaf node).
+ */
+ uint32_t last_fwd_ack;
+
+ /**
+ * BCK ACK value received from the hop towards the owner of the tunnel,
+ * (previous node / owner): up to what message PID can we sent back to him.
+ */
+ uint32_t bck_ack;
+
+ /**
+ * How many messages are in the forward queue (towards leaves).
+ */
+ unsigned int fwd_queue_n;
+
+ /**
+ * How many messages do we accept in the forward queue.
*/
- uint32_t mid;
+ unsigned int fwd_queue_max;
+
+ /**
+ * How many messages are in the backward queue (towards origin).
+ */
+ unsigned int bck_queue_n;
+
+ /**
+ * How many messages do we accept in the backward queue.
+ */
+ unsigned int bck_queue_max;
/**
* Last time the tunnel was used
struct MeshClient *owner;
/**
- * Clients that have been informed about the tunnel, if any
+ * Clients that have been informed about and want to stay in the tunnel.
*/
struct MeshClient **clients;
/**
- * Number of elements in clients
+ * Flow control info for each client.
+ */
+ struct MeshTunnelClientInfo *clients_fc;
+
+ /**
+ * Number of elements in clients/clients_fc
*/
unsigned int nclients;
/**
- * Clients that have requested to leave the tunnel
+ * Clients that have been informed but requested to leave the tunnel.
*/
struct MeshClient **ignore;
unsigned int nignore;
/**
- * Messages ready to transmit
+ * Blacklisted peers
+ */
+ GNUNET_PEER_Id *blacklisted;
+
+ /**
+ * Number of elements in blacklisted
*/
- struct MeshQueue *queue_head;
- struct MeshQueue *queue_tail;
+ unsigned int nblacklisted;
+
+ /**
+ * Bloomfilter (for peer identities) to stop circular routes
+ */
+ char bloomfilter[MESH_BLOOM_SIZE];
/**
* Tunnel paths
*/
struct GNUNET_DHT_GetHandle *dht_get_type;
+ /**
+ * Initial context of the regex search for a connect_by_string
+ */
+ struct MeshRegexSearchContext *regex_ctx;
+
+ /**
+ * Task to keep the used paths alive
+ */
+ GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
+
+ /**
+ * Task to destroy the tunnel after timeout
+ *
+ * FIXME: merge the two? a tunnel will have either
+ * a path refresh OR a timeout, never both!
+ */
+ GNUNET_SCHEDULER_TaskIdentifier timeout_task;
+
+ /**
+ * Flag to signal the destruction of the tunnel.
+ * If this is set GNUNET_YES the tunnel will be destroyed
+ * when the queue is empty.
+ */
+ int destroy;
+};
+
+
+/**
+ * Info about a child node in a tunnel, needed to perform flow control.
+ */
+struct MeshTunnelChildInfo
+{
+ /**
+ * ID of the child node.
+ */
+ GNUNET_PEER_Id id;
+
+ /**
+ * SKIP value.
+ */
+ uint32_t skip;
+
+ /**
+ * Last sent PID.
+ */
+ uint32_t pid;
+
+ /**
+ * Maximum PID allowed (FWD ACK received).
+ */
+ uint32_t fwd_ack;
+
+ /**
+ * Last ACK sent to that child (BCK ACK).
+ */
+ uint32_t bck_ack;
+};
+
+
+/**
+ * Info about a leaf client of a tunnel, needed to perform flow control.
+ */
+struct MeshTunnelClientInfo
+{
/**
- * Task to keep the used paths alive
+ * PID of the last packet sent to the client (FWD).
*/
- GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
+ uint32_t fwd_pid;
/**
- * Task to destroy the tunnel after timeout
- *
- * FIXME: merge the two? a tunnel will have either
- * a path refresh OR a timeout, never both!
+ * PID of the last packet received from the client (BCK).
*/
- GNUNET_SCHEDULER_TaskIdentifier timeout_task;
+ uint32_t bck_pid;
+
+ /**
+ * Maximum PID allowed (FWD ACK received).
+ */
+ uint32_t fwd_ack;
+
+ /**
+ * Last ACK sent to that child (BCK ACK).
+ */
+ uint32_t bck_ack;
+};
+
+
+
+/**
+ * Info collected during iteration of child nodes in order to get the ACK value
+ * for a tunnel.
+ */
+struct MeshTunnelChildIteratorContext
+{
+ /**
+ * Tunnel whose info is being collected.
+ */
+ struct MeshTunnel *t;
+
+ /**
+ * Is this context initialized? Is the value in max_child_ack valid?
+ */
+ int init;
+
+ /**
+ * Maximum child ACK so far.
+ */
+ uint32_t max_child_ack;
+
+ /**
+ * Number of children nodes
+ */
+ unsigned int nchildren;
};
* Path itself
*/
struct MeshPeerPath *path;
-
- /**
- * Position in peer's transmit queue
- */
- unsigned int pos;
};
* ID of the client, mainly for debug messages
*/
unsigned int id;
+
+ /**
+ * Regular expressions describing the services offered by this client.
+ */
+ char **regexes; // FIXME add timeout? API to remove a regex?
+
+ /**
+ * Number of regular expressions in regexes.
+ */
+ unsigned int n_regex;
+
+ /**
+ * Task to refresh all regular expresions in the DHT.
+ */
+ GNUNET_SCHEDULER_TaskIdentifier regex_announce_task;
+
+};
+
+
+/**
+ * Struct to keep information of searches of services described by a regex
+ * using a user-provided string service description.
+ */
+struct MeshRegexSearchInfo
+{
+ /**
+ * Which tunnel is this for
+ */
+ struct MeshTunnel *t;
+
+ /**
+ * User provided description of the searched service.
+ */
+ char *description;
+
+ /**
+ * Part of the description already consumed by the search.
+ */
+ size_t position;
+
+ /**
+ * Running DHT GETs.
+ */
+ struct GNUNET_CONTAINER_MultiHashMap *dht_get_handles;
+
+ /**
+ * Results from running DHT GETs.
+ */
+ struct GNUNET_CONTAINER_MultiHashMap *dht_get_results;
+
+ /**
+ * Contexts, for each running DHT GET. Free all on end of search.
+ */
+ struct MeshRegexSearchContext **contexts;
+
+ /**
+ * Number of contexts (branches/steps in search).
+ */
+ unsigned int n_contexts;
+
+ /**
+ * Peer that is connecting via connect_by_string. When connected, free ctx.
+ */
+ GNUNET_PEER_Id peer;
+
+ /**
+ * Other peers that are found but not yet being connected to.
+ */
+ GNUNET_PEER_Id *peers;
+
+ /**
+ * Number of elements in peers.
+ */
+ unsigned int n_peers;
+
+ /**
+ * Next peer to try to connect to.
+ */
+ unsigned int i_peer;
+
+ /**
+ * Timeout for a connect attempt.
+ * When reached, try to connect to a different peer, if any. If not,
+ * try the same peer again.
+ */
+ GNUNET_SCHEDULER_TaskIdentifier timeout;
};
+/**
+ * Struct to keep state of running searches that have consumed a part of
+ * the inital string.
+ */
+struct MeshRegexSearchContext
+{
+ /**
+ * Part of the description already consumed by
+ * this particular search branch.
+ */
+ size_t position;
+
+ /**
+ * Information about the search.
+ */
+ struct MeshRegexSearchInfo *info;
+};
/******************************************************************************/
/************************ DEBUG FUNCTIONS ****************************/
* after the PUT message was transmitted
* (so we don't know if it was received or not)
*/
+
+#if 0
static void
mesh_debug (void *cls, int success)
{
}
#endif
+#endif
+
/******************************************************************************/
/*********************** GLOBAL VARIABLES ****************************/
/******************************************************************************/
/**
- * All the clients
+ * Configuration parameters
*/
-static struct MeshClient *clients;
-static struct MeshClient *clients_tail;
+static struct GNUNET_TIME_Relative refresh_path_time;
+static struct GNUNET_TIME_Relative app_announce_time;
+static struct GNUNET_TIME_Relative id_announce_time;
+static struct GNUNET_TIME_Relative unacknowledged_wait_time;
+static struct GNUNET_TIME_Relative connect_timeout;
+static long long unsigned int default_ttl;
+static long long unsigned int dht_replication_level;
+static long long unsigned int max_tunnels;
+static long long unsigned int max_msgs_queue;
/**
- * Tunnels known, indexed by MESH_TunnelID (MeshTunnel)
+ * DLL with all the clients, head.
*/
-static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
+static struct MeshClient *clients;
/**
- * Tunnels incoming, indexed by MESH_TunnelNumber
- * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
+ * DLL with all the clients, tail.
*/
-static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
+static struct MeshClient *clients_tail;
/**
- * Peers known, indexed by PeerIdentity (MeshPeerInfo)
+ * Tunnels known, indexed by MESH_TunnelID (MeshTunnel).
*/
-static struct GNUNET_CONTAINER_MultiHashMap *peers;
+static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
/**
- * Handle to communicate with core
+ * Number of tunnels known.
*/
-static struct GNUNET_CORE_Handle *core_handle;
+static unsigned long long n_tunnels;
+
+/**
+ * Tunnels incoming, indexed by MESH_TunnelNumber
+ * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV).
+ */
+static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
/**
+ * Peers known, indexed by PeerIdentity (MeshPeerInfo).
+ */
+static struct GNUNET_CONTAINER_MultiHashMap *peers;
+
+/*
* Handle to communicate with transport
*/
// static struct GNUNET_TRANSPORT_Handle *transport_handle;
/**
- * Handle to use DHT
+ * Handle to communicate with core.
+ */
+static struct GNUNET_CORE_Handle *core_handle;
+
+/**
+ * Handle to use DHT.
*/
static struct GNUNET_DHT_Handle *dht_handle;
/**
- * Handle to server
+ * Handle to server.
*/
static struct GNUNET_SERVER_Handle *server_handle;
/**
- * Notification context, to send messages to local clients
+ * Handle to the statistics service.
+ */
+static struct GNUNET_STATISTICS_Handle *stats;
+
+/**
+ * Notification context, to send messages to local clients.
*/
static struct GNUNET_SERVER_NotificationContext *nc;
/**
- * Local peer own ID (memory efficient handle)
+ * Local peer own ID (memory efficient handle).
*/
static GNUNET_PEER_Id myid;
/**
- * Local peer own ID (full value)
+ * Local peer own ID (full value).
*/
static struct GNUNET_PeerIdentity my_full_id;
/**
- * Own private key
+ * Own private key.
*/
static struct GNUNET_CRYPTO_RsaPrivateKey *my_private_key;
static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
/**
- * Tunnel ID for the next created tunnel (global tunnel number)
+ * Tunnel ID for the next created tunnel (global tunnel number).
*/
static MESH_TunnelNumber next_tid;
/**
- * Tunnel ID for the next incoming tunnel (local tunnel number)
+ * Tunnel ID for the next incoming tunnel (local tunnel number).
*/
static MESH_TunnelNumber next_local_tid;
/**
- * All application types provided by this peer
+ * All application types provided by this peer.
*/
static struct GNUNET_CONTAINER_MultiHashMap *applications;
/**
- * All message types clients of this peer are interested in
+ * All message types clients of this peer are interested in.
*/
static struct GNUNET_CONTAINER_MultiHashMap *types;
/**
- * Task to periodically announce provided applications
+ * Task to periodically announce provided applications.
*/
GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
/**
- * Task to periodically announce itself in the network
+ * Task to periodically announce itself in the network.
*/
GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
/**
- * Next ID to assign to a client
+ * Next ID to assign to a client.
*/
unsigned int next_client_id;
-
/******************************************************************************/
-/************************ ITERATORS ****************************/
+/*********************** DECLARATIONS **************************/
/******************************************************************************/
-/* FIXME move iterators here */
+/* FIXME move declarations here */
+/**
+ * Function to process paths received for a new peer addition. The recorded
+ * paths form the initial tunnel, which can be optimized later.
+ * Called on each result obtained for the DHT search.
+ *
+ * @param cls closure
+ * @param exp when will this value expire
+ * @param key key of the result
+ * @param type type of the result
+ * @param size number of bytes in data
+ * @param data pointer to the result data
+ */
+static void
+dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
+ const struct GNUNET_HashCode * key,
+ const struct GNUNET_PeerIdentity *get_path,
+ unsigned int get_path_length,
+ const struct GNUNET_PeerIdentity *put_path,
+ unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
+ size_t size, const void *data);
-/******************************************************************************/
-/************************ PERIODIC FUNCTIONS ****************************/
-/******************************************************************************/
/**
- * Announce iterator over for each application provided by the peer
+ * Function to process DHT string to regex matching.
+ * Called on each result obtained for the DHT search.
*
- * @param cls closure
- * @param key current key code
- * @param value value in the hash map
- * @return GNUNET_YES if we should continue to
- * iterate,
- * GNUNET_NO if not.
+ * @param cls closure (search context)
+ * @param exp when will this value expire
+ * @param key key of the result
+ * @param get_path path of the get request (not used)
+ * @param get_path_length lenght of get_path (not used)
+ * @param put_path path of the put request (not used)
+ * @param put_path_length length of the put_path (not used)
+ * @param type type of the result
+ * @param size number of bytes in data
+ * @param data pointer to the result data
+ *
+ * TODO: re-issue the request after certain time? cancel after X results?
*/
-static int
-announce_application (void *cls, const GNUNET_HashCode * key, void *value)
-{
- /* FIXME are hashes in multihash map equal on all aquitectures? */
- /* FIXME: keep return value of 'put' to possibly cancel!? */
- GNUNET_DHT_put (dht_handle, key, 10,
- GNUNET_DHT_RO_RECORD_ROUTE |
- GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, GNUNET_BLOCK_TYPE_TEST,
- sizeof (struct GNUNET_PeerIdentity),
- (const char *) &my_full_id,
- GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
- APP_ANNOUNCE_TIME),
- APP_ANNOUNCE_TIME, NULL, NULL);
- return GNUNET_OK;
-}
+static void
+dht_get_string_handler (void *cls, struct GNUNET_TIME_Absolute exp,
+ const struct GNUNET_HashCode * key,
+ const struct GNUNET_PeerIdentity *get_path,
+ unsigned int get_path_length,
+ const struct GNUNET_PeerIdentity *put_path,
+ unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
+ size_t size, const void *data);
/**
- * Periodically announce what applications are provided by local clients
+ * Function to process DHT string to regex matching.
+ * Called on each result obtained for the DHT search.
*
- * @param cls closure
- * @param tc task context
+ * @param cls closure (search context)
+ * @param exp when will this value expire
+ * @param key key of the result
+ * @param get_path path of the get request (not used)
+ * @param get_path_length lenght of get_path (not used)
+ * @param put_path path of the put request (not used)
+ * @param put_path_length length of the put_path (not used)
+ * @param type type of the result
+ * @param size number of bytes in data
+ * @param data pointer to the result data
*/
static void
-announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
- {
- announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
- return;
- }
-
- DEBUG_DHT ("Starting PUT for apps\n");
+dht_get_string_accept_handler (void *cls, struct GNUNET_TIME_Absolute exp,
+ const struct GNUNET_HashCode * key,
+ const struct GNUNET_PeerIdentity *get_path,
+ unsigned int get_path_length,
+ const struct GNUNET_PeerIdentity *put_path,
+ unsigned int put_path_length,
+ enum GNUNET_BLOCK_Type type,
+ size_t size, const void *data);
- GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
- NULL);
- announce_applications_task =
- GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME, &announce_applications,
- cls);
- DEBUG_DHT ("Finished PUT for apps\n");
- return;
-}
+/**
+ * Retrieve the MeshPeerInfo stucture associated with the peer, create one
+ * and insert it in the appropiate structures if the peer is not known yet.
+ *
+ * @param peer Short identity of the peer.
+ *
+ * @return Existing or newly created peer info.
+ */
+static struct MeshPeerInfo *
+peer_info_get_short (const GNUNET_PEER_Id peer);
/**
- * Periodically announce self id in the DHT
+ * Try to establish a new connection to this peer.
+ * Use the best path for the given tunnel.
+ * If the peer doesn't have any path to it yet, try to get one.
+ * If the peer already has some path, send a CREATE PATH towards it.
*
- * @param cls closure
- * @param tc task context
+ * @param peer PeerInfo of the peer.
+ * @param t Tunnel for which to create the path, if possible.
*/
static void
-announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
- {
- announce_id_task = GNUNET_SCHEDULER_NO_TASK;
- return;
- }
- /* TODO
- * - Set data expiration in function of X
- * - Adapt X to churn
- */
- DEBUG_DHT ("DHT_put for ID %s started.\n", GNUNET_i2s (&my_full_id));
-
- GNUNET_DHT_put (dht_handle, /* DHT handle */
- &my_full_id.hashPubKey, /* Key to use */
- 10, /* Replication level */
- GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
- GNUNET_BLOCK_TYPE_TEST, /* Block type */
- sizeof (my_full_id), /* Size of the data */
- (char *) &my_full_id, /* Data itself */
- GNUNET_TIME_absolute_get_forever (), /* Data expiration */
- GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
- NULL, /* Continuation */
- NULL); /* Continuation closure */
- announce_id_task =
- GNUNET_SCHEDULER_add_delayed (ID_ANNOUNCE_TIME, &announce_id, cls);
-}
+peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t);
/**
- * Function to process paths received for a new peer addition. The recorded
- * paths form the initial tunnel, which can be optimized later.
- * Called on each result obtained for the DHT search.
+ * Add a peer to a tunnel, accomodating paths accordingly and initializing all
+ * needed rescources.
+ * If peer already exists, reevaluate shortest path and change if different.
+ *
+ * @param t Tunnel we want to add a new peer to
+ * @param peer PeerInfo of the peer being added
*
- * @param cls closure
- * @param exp when will this value expire
- * @param key key of the result
- * @param type type of the result
- * @param size number of bytes in data
- * @param data pointer to the result data
*/
static void
-dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
- const GNUNET_HashCode * key,
- const struct GNUNET_PeerIdentity *get_path,
- unsigned int get_path_length,
- const struct GNUNET_PeerIdentity *put_path,
- unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
- size_t size, const void *data);
+tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer);
-/******************************************************************************/
-/****************** GENERAL HELPER FUNCTIONS ************************/
-/******************************************************************************/
+/**
+ * Removes an explicit path from a tunnel, freeing all intermediate nodes
+ * that are no longer needed, as well as nodes of no longer reachable peers.
+ * The tunnel itself is also destoyed if results in a remote empty tunnel.
+ *
+ * @param t Tunnel from which to remove the path.
+ * @param peer Short id of the peer which should be removed.
+ */
+static void
+tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer);
+
/**
- * Search for a tunnel by global ID using full PeerIdentities
+ * Search for a tunnel by global ID using full PeerIdentities.
*
- * @param oid owner of the tunnel
- * @param tid global tunnel number
+ * @param oid owner of the tunnel.
+ * @param tid global tunnel number.
*
- * @return tunnel handler, NULL if doesn't exist
+ * @return tunnel handler, NULL if doesn't exist.
*/
static struct MeshTunnel *
tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
/**
* Delete an active client from the tunnel.
- *
+ *
* @param t Tunnel.
* @param c Client.
*/
/**
- * Check if client has registered with the service and has not disconnected
+ * Get the current ack value for a tunnel, for data going from root to leaves,
+ * taking in account the tunnel mode and the status of all children and clients.
*
- * @param client the client to check
+ * @param t Tunnel.
*
- * @return non-NULL if client exists in the global DLL
+ * @return Maximum PID allowed.
*/
-static struct MeshClient *
-client_get (struct GNUNET_SERVER_Client *client)
-{
- struct MeshClient *c;
+static uint32_t
+tunnel_get_fwd_ack (struct MeshTunnel *t);
- c = clients;
- while (NULL != c)
- {
- if (c->handle == client)
- return c;
- c = c->next;
- }
- return NULL;
-}
+
+/**
+ * Add a client to a tunnel, initializing all needed data structures.
+ *
+ * @param t Tunnel to which add the client.
+ * @param c Client which to add to the tunnel.
+ */
+static void
+tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c);
/**
- * Checks if a given client has subscribed to certain message type
- *
- * @param message_type Type of message to check
- * @param c Client to check
+ * Iterator over edges in a regex block retrieved from the DHT.
*
- * @return GNUNET_YES or GNUNET_NO, depending on subscription status
+ * @param cls Closure.
+ * @param token Token that follows to next state.
+ * @param len Lenght of token.
+ * @param key Hash of next state.
*
- * TODO inline?
+ * @return GNUNET_YES if should keep iterating, GNUNET_NO otherwise.
*/
static int
-client_is_subscribed (uint16_t message_type, struct MeshClient *c)
-{
- GNUNET_HashCode hc;
-
- GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
- return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
-}
+regex_edge_iterator (void *cls,
+ const char *token,
+ size_t len,
+ const struct GNUNET_HashCode *key);
/**
- * Allow a client to send more data after transmitting a multicast message
- * which some neighbor has not yet accepted altough a reasonable time has
- * passed.
- *
- * @param cls Closure (DataDescriptor containing the task identifier)
- * @param tc Task Context
+ * Find a path to a peer that offers a regex servcie compatible
+ * with a given string.
*
- * FIXME reference counter cshould be just int
+ * @param key The key of the accepting state.
+ * @param ctx Context containing info about the string, tunnel, etc.
*/
static void
-client_allow_send (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct MeshData *mdata = cls;
+regex_find_path (const struct GNUNET_HashCode *key,
+ struct MeshRegexSearchContext *ctx);
- if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
- return;
- GNUNET_assert (NULL != mdata->reference_counter);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "CLIENT ALLOW SEND DESPITE %u COPIES PENDING\n",
- *(mdata->reference_counter));
- *(mdata->task) = GNUNET_SCHEDULER_NO_TASK;
- GNUNET_SERVER_receive_done (mdata->t->owner->handle, GNUNET_OK);
-}
+/**
+ * Queue and pass message to core when possible.
+ *
+ * @param cls Closure (type dependant).
+ * @param type Type of the message, 0 for a raw message.
+ * @param size Size of the message.
+ * @param dst Neighbor to send message to.
+ * @param t Tunnel this message belongs to.
+ */
+static void
+queue_add (void *cls, uint16_t type, size_t size,
+ struct MeshPeerInfo *dst, struct MeshTunnel *t);
/**
- * Check whether client wants traffic from a tunnel.
+ * Free a transmission that was already queued with all resources
+ * associated to the request.
*
- * @param c Client to check.
- * @param t Tunnel to be found.
+ * @param queue Queue handler to cancel.
+ * @param clear_cls Is it necessary to free associated cls?
+ */
+static void
+queue_destroy (struct MeshPeerQueue *queue, int clear_cls);
+
+/******************************************************************************/
+/************************ ITERATORS ****************************/
+/******************************************************************************/
+
+/**
+ * Iterator over found existing mesh regex blocks that match an ongoing search.
*
- * @return GNUNET_YES if client knows tunnel.
- *
- * TODO look in client hashmap
+ * @param cls closure
+ * @param key current key code
+ * @param value value in the hash map
+ * @return GNUNET_YES if we should continue to iterate,
+ * GNUNET_NO if not.
*/
static int
-client_wants_tunnel (struct MeshClient *c, struct MeshTunnel *t)
+regex_result_iterator (void *cls,
+ const struct GNUNET_HashCode * key,
+ void *value)
{
- unsigned int i;
+ struct MeshRegexBlock *block = value;
+ struct MeshRegexSearchContext *ctx = cls;
- for (i = 0; i < t->nclients; i++)
- if (t->clients[i] == c)
- return GNUNET_YES;
- return GNUNET_NO;
+ if (GNUNET_YES == ntohl(block->accepting) &&
+ ctx->position == strlen (ctx->info->description))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Found accepting known block\n");
+ regex_find_path (key, ctx);
+ return GNUNET_YES; // We found an accept state!
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* %u, %u, [%u]\n",
+ ctx->position, strlen(ctx->info->description),
+ ntohl(block->accepting));
+
+ }
+ (void) GNUNET_MESH_regex_block_iterate (block, SIZE_MAX,
+ ®ex_edge_iterator, ctx);
+
+ return GNUNET_YES;
}
/**
- * Check whether client has been informed about a tunnel.
+ * Iterator over edges in a regex block retrieved from the DHT.
*
- * @param c Client to check.
- * @param t Tunnel to be found.
+ * @param cls Closure (context of the search).
+ * @param token Token that follows to next state.
+ * @param len Lenght of token.
+ * @param key Hash of next state.
*
- * @return GNUNET_YES if client knows tunnel.
- *
- * TODO look in client hashmap
+ * @return GNUNET_YES if should keep iterating, GNUNET_NO otherwise.
*/
static int
-client_knows_tunnel (struct MeshClient *c, struct MeshTunnel *t)
+regex_edge_iterator (void *cls,
+ const char *token,
+ size_t len,
+ const struct GNUNET_HashCode *key)
{
- unsigned int i;
-
- for (i = 0; i < t->nignore; i++)
- if (t->ignore[i] == c)
- return GNUNET_YES;
- return client_wants_tunnel(c, t);
+ struct MeshRegexSearchContext *ctx = cls;
+ struct MeshRegexSearchContext *new_ctx;
+ struct MeshRegexSearchInfo *info = ctx->info;
+ struct GNUNET_DHT_GetHandle *get_h;
+ char *current;
+ size_t current_len;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Start of regex edge iterator\n");
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* descr : %s\n", info->description);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* posit : %u\n", ctx->position);
+ current = &info->description[ctx->position];
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* currt : %s\n", current);
+ current_len = strlen (info->description) - ctx->position;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* ctlen : %u\n", current_len);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* tklen : %u\n", len);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* tk[0] : %c\n", token[0]);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* nextk : %s\n", GNUNET_h2s(key));
+ if (len > current_len)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token too long, END\n");
+ return GNUNET_YES; // Token too long, wont match
+ }
+ if (0 != strncmp (current, token, len))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token doesn't match, END\n");
+ return GNUNET_YES; // Token doesn't match
+ }
+ new_ctx = GNUNET_malloc (sizeof (struct MeshRegexSearchContext));
+ new_ctx->info = info;
+ new_ctx->position = ctx->position + len;
+ GNUNET_array_append (info->contexts, info->n_contexts, new_ctx);
+ if (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_contains(info->dht_get_handles, key))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* GET running, END\n");
+ GNUNET_CONTAINER_multihashmap_get_multiple (info->dht_get_results, key,
+ ®ex_result_iterator,
+ new_ctx);
+ return GNUNET_YES; // We are already looking for it
+ }
+ /* Start search in DHT */
+ get_h =
+ GNUNET_DHT_get_start (dht_handle, /* handle */
+ GNUNET_BLOCK_TYPE_MESH_REGEX, /* type */
+ key, /* key to search */
+ dht_replication_level, /* replication level */
+ GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
+ NULL, /* xquery */ // FIXME BLOOMFILTER
+ 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
+ &dht_get_string_handler, new_ctx);
+ if (GNUNET_OK !=
+ GNUNET_CONTAINER_multihashmap_put(info->dht_get_handles, key, get_h,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
+ {
+ GNUNET_break (0);
+ return GNUNET_YES;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* End of regex edge iterator\n");
+ return GNUNET_YES;
}
-
/**
- * Marks a client as uninterested in traffic from the tunnel, updating both
- * client and tunnel to reflect this.
- *
- * @param c Client that doesn't want traffic anymore.
- * @param t Tunnel which should be ignored.
+ * Iterator over hash map entries to cancel DHT GET requests after a
+ * successful connect_by_string.
*
- * FIXME when to delete an incoming tunnel?
+ * @param cls Closure (unused).
+ * @param key Current key code (unused).
+ * @param value Value in the hash map (get handle).
+ * @return GNUNET_YES if we should continue to iterate,
+ * GNUNET_NO if not.
*/
-static void
-client_ignore_tunnel (struct MeshClient *c, struct MeshTunnel *t)
+static int
+regex_cancel_dht_get (void *cls,
+ const struct GNUNET_HashCode * key,
+ void *value)
{
- GNUNET_HashCode hash;
+ struct GNUNET_DHT_GetHandle *h = value;
- GNUNET_CRYPTO_hash(&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
- GNUNET_break (GNUNET_YES ==
- GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
- &hash, t));
- GNUNET_break (GNUNET_YES ==
- GNUNET_CONTAINER_multihashmap_put (c->ignore_tunnels, &hash, t,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
- tunnel_delete_active_client (t, c);
- GNUNET_array_append (t->ignore, t->nignore, c);
+ GNUNET_DHT_get_stop (h);
+ return GNUNET_YES;
}
/**
- * Deletes a tunnel from a client (either owner or destination). To be used on
- * tunnel destroy, otherwise, use client_ignore_tunnel.
+ * Iterator over hash map entries to free MeshRegexBlocks stored during the
+ * search for connect_by_string.
*
- * @param c Client whose tunnel to delete.
- * @param t Tunnel which should be deleted.
+ * @param cls Closure (unused).
+ * @param key Current key code (unused).
+ * @param value MeshRegexBlock in the hash map.
+ * @return GNUNET_YES if we should continue to iterate,
+ * GNUNET_NO if not.
*/
-static void
-client_delete_tunnel (struct MeshClient *c, struct MeshTunnel *t)
+static int
+regex_free_result (void *cls,
+ const struct GNUNET_HashCode * key,
+ void *value)
{
- GNUNET_HashCode hash;
- if (c == t->owner)
- {
- GNUNET_CRYPTO_hash(&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
- GNUNET_assert (GNUNET_YES ==
- GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels,
- &hash,
- t));
- }
- else
- {
- GNUNET_CRYPTO_hash(&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
- // FIXME XOR?
- GNUNET_assert (GNUNET_YES ==
- GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
- &hash,
- t) ||
- GNUNET_YES ==
- GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels,
- &hash,
- t));
- }
-
+ GNUNET_free (value);
+ return GNUNET_YES;
}
/**
- * Send the message to all clients that have subscribed to its type
+ * Regex callback iterator to store own service description in the DHT.
*
- * @param msg Pointer to the message itself
- * @param payload Pointer to the payload of the message.
- * @return number of clients this message was sent to
+ * @param cls closure.
+ * @param key hash for current state.
+ * @param proof proof for current state.
+ * @param accepting GNUNET_YES if this is an accepting state, GNUNET_NO if not.
+ * @param num_edges number of edges leaving current state.
+ * @param edges edges leaving current state.
*/
-static unsigned int
-send_subscribed_clients (const struct GNUNET_MessageHeader *msg,
- const struct GNUNET_MessageHeader *payload)
+void
+regex_iterator (void *cls, const struct GNUNET_HashCode *key, const char *proof,
+ int accepting, unsigned int num_edges,
+ const struct GNUNET_REGEX_Edge *edges)
{
- struct GNUNET_PeerIdentity *oid;
- struct MeshClient *c;
- struct MeshTunnel *t;
- MESH_TunnelNumber *tid;
- unsigned int count;
- uint16_t type;
- char cbuf[htons (msg->size)];
-
- type = ntohs (payload->type);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending to clients...\n");
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "message of type %u\n", type);
-
- memcpy (cbuf, msg, sizeof (cbuf));
- switch (htons (msg->type))
- {
- struct GNUNET_MESH_Unicast *uc;
- struct GNUNET_MESH_Multicast *mc;
- struct GNUNET_MESH_ToOrigin *to;
+ struct MeshRegexBlock *block;
+ struct MeshRegexEdge *block_edge;
+ enum GNUNET_DHT_RouteOption opt;
+ size_t size;
+ size_t len;
+ unsigned int i;
+ unsigned int offset;
+ char *aux;
- case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
- uc = (struct GNUNET_MESH_Unicast *) cbuf;
- tid = &uc->tid;
- oid = &uc->oid;
- break;
- case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
- mc = (struct GNUNET_MESH_Multicast *) cbuf;
- tid = &mc->tid;
- oid = &mc->oid;
- break;
- case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
- to = (struct GNUNET_MESH_ToOrigin *) cbuf;
- tid = &to->tid;
- oid = &to->oid;
- break;
- default:
- GNUNET_break (0);
- return 0;
- }
- t = tunnel_get (oid, ntohl (*tid));
- if (NULL == t)
- {
- GNUNET_break (0);
- return 0;
- }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " regex dht put for state %s\n",
+ GNUNET_h2s(key));
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " proof: %s\n",
+ proof);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " num edges: %u\n",
+ num_edges);
- for (count = 0, c = clients; c != NULL; c = c->next)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client %u\n", c->id);
- if (client_is_subscribed (type, c))
+ opt = GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE;
+ if (GNUNET_YES == accepting)
{
- if (htons (msg->type) == GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN)
- {
- if (c != t->owner)
- continue;
- *tid = htonl (t->local_tid);
- }
- else
- {
- if (GNUNET_NO == client_knows_tunnel (c, t))
- {
- /* This client doesn't know the tunnel */
- struct GNUNET_MESH_TunnelNotification tmsg;
- GNUNET_HashCode hash;
-
- tmsg.header.size = htons (sizeof (tmsg));
- tmsg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
- GNUNET_PEER_resolve (t->id.oid, &tmsg.peer);
- tmsg.tunnel_id = htonl (t->local_tid_dest);
- GNUNET_SERVER_notification_context_unicast (nc, c->handle,
- &tmsg.header, GNUNET_NO);
- GNUNET_array_append (t->clients, t->nclients, c);
- GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
- &hash);
- GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
- c->incoming_tunnels, &hash, t,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
- }
- *tid = htonl (t->local_tid_dest);
- }
-
- /* Check if the client wants to get traffic from the tunnel */
- if (GNUNET_NO == client_wants_tunnel(c, t))
- continue;
- count++;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending\n");
- GNUNET_SERVER_notification_context_unicast (nc, c->handle,
- (struct GNUNET_MessageHeader
- *) cbuf, GNUNET_YES);
+ struct MeshRegexAccept block;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " state %s is accepting, putting own id\n",
+ GNUNET_h2s(key));
+ size = sizeof (block);
+ block.key = *key;
+ block.id = my_full_id;
+ (void)
+ GNUNET_DHT_put(dht_handle, key,
+ dht_replication_level,
+ opt | GNUNET_DHT_RO_RECORD_ROUTE,
+ GNUNET_BLOCK_TYPE_MESH_REGEX_ACCEPT,
+ size,
+ (char *) &block,
+ GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
+ app_announce_time),
+ app_announce_time,
+ NULL, NULL);
}
- }
- return count;
+ len = strlen(proof);
+ size = sizeof (struct MeshRegexBlock) + len;
+ block = GNUNET_malloc (size);
+
+ block->key = *key;
+ block->n_proof = htonl (len);
+ block->n_edges = htonl (num_edges);
+ block->accepting = htonl (accepting);
+
+ /* Store the proof at the end of the block. */
+ aux = (char *) &block[1];
+ memcpy (aux, proof, len);
+ aux = &aux[len];
+
+ /* Store each edge in a variable length MeshEdge struct at the
+ * very end of the MeshRegexBlock structure.
+ */
+ for (i = 0; i < num_edges; i++)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " edge %s towards %s\n",
+ edges[i].label,
+ GNUNET_h2s(&edges[i].destination));
+
+ /* aux points at the end of the last block */
+ len = strlen (edges[i].label);
+ size += sizeof (struct MeshRegexEdge) + len;
+ // Calculate offset FIXME is this ok? use size instead?
+ offset = aux - (char *) block;
+ block = GNUNET_realloc (block, size);
+ aux = &((char *) block)[offset];
+ block_edge = (struct MeshRegexEdge *) aux;
+ block_edge->key = edges[i].destination;
+ block_edge->n_token = htonl (len);
+ aux = (char *) &block_edge[1];
+ memcpy (aux, edges[i].label, len);
+ aux = &aux[len];
+ }
+ (void)
+ GNUNET_DHT_put(dht_handle, key,
+ dht_replication_level,
+ opt,
+ GNUNET_BLOCK_TYPE_MESH_REGEX, size,
+ (char *) block,
+ GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
+ app_announce_time),
+ app_announce_time,
+ NULL, NULL);
+ GNUNET_free (block);
}
/**
- * Notify the client that owns the tunnel that a peer has connected to it
- * (the requested path to it has been confirmed).
+ * Store the regular expression describing a local service into the DHT.
*
- * @param t Tunnel whose owner to notify
- * @param id Short id of the peer that has connected
+ * @param regex The regular expresion.
*/
static void
-send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
+regex_put (const char *regex)
{
- struct GNUNET_MESH_PeerControl pc;
+ struct GNUNET_REGEX_Automaton *dfa;
- pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
- pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
- pc.tunnel_id = htonl (t->local_tid);
- GNUNET_PEER_resolve (id, &pc.peer);
- GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle, &pc.header,
- GNUNET_NO);
-}
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "regex_put (%s) start\n", regex);
+ dfa = GNUNET_REGEX_construct_dfa (regex, strlen(regex));
+ GNUNET_REGEX_iterate_all_edges (dfa, ®ex_iterator, NULL);
+ GNUNET_REGEX_automaton_destroy (dfa);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "regex_put (%s) end\n", regex);
+}
/**
- * Notify all clients (not depending on registration status) that the incoming
- * tunnel is no longer valid.
- *
- * @param t Tunnel that was destroyed.
+ * Find a path to a peer that offers a regex servcie compatible
+ * with a given string.
+ *
+ * @param key The key of the accepting state.
+ * @param ctx Context containing info about the string, tunnel, etc.
*/
static void
-send_clients_tunnel_destroy (struct MeshTunnel *t)
+regex_find_path (const struct GNUNET_HashCode *key,
+ struct MeshRegexSearchContext *ctx)
{
- struct GNUNET_MESH_TunnelMessage msg;
-
- msg.header.size = htons (sizeof (msg));
- msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
- msg.tunnel_id = htonl (t->local_tid_dest);
- GNUNET_SERVER_notification_context_broadcast (nc, &msg.header, GNUNET_NO);
+ struct GNUNET_DHT_GetHandle *get_h;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found peer by service\n");
+ get_h = GNUNET_DHT_get_start (dht_handle, /* handle */
+ GNUNET_BLOCK_TYPE_MESH_REGEX_ACCEPT, /* type */
+ key, /* key to search */
+ dht_replication_level, /* replication level */
+ GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE |
+ GNUNET_DHT_RO_RECORD_ROUTE,
+ NULL, /* xquery */ // FIXME BLOOMFILTER
+ 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
+ &dht_get_string_accept_handler, ctx);
+ GNUNET_break (GNUNET_OK ==
+ GNUNET_CONTAINER_multihashmap_put(ctx->info->dht_get_handles,
+ key,
+ get_h,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
}
/**
- * Notify clients of tunnel disconnections, if needed.
- * In case the origin disconnects, the destination clients get a tunnel destroy
- * notification. If the last destination disconnects (only one remaining client
- * in tunnel), the origin gets a (local ID) peer disconnected.
- * Note that the function must be called BEFORE removing the client from
- * the tunnel.
+ * Function called if the connect attempt to a peer found via
+ * connect_by_string times out. Try to connect to another peer, if any.
+ * Otherwise try to reconnect to the same peer.
*
- * @param t Tunnel that was destroyed.
- * @param c Client that disconnected.
+ * @param cls Closure (info about regex search).
+ * @param tc TaskContext.
*/
static void
-send_client_tunnel_disconnect (struct MeshTunnel *t, struct MeshClient *c)
+regex_connect_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- unsigned int i;
+ struct MeshRegexSearchInfo *info = cls;
+ struct MeshPeerInfo *peer_info;
+ GNUNET_PEER_Id id;
+ GNUNET_PEER_Id old;
- if (c == t->owner)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Regex connect timeout\n");
+ info->timeout = GNUNET_SCHEDULER_NO_TASK;
+ if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
{
- struct GNUNET_MESH_TunnelMessage msg;
+ return;
+ }
- msg.header.size = htons (sizeof (msg));
- msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
- msg.tunnel_id = htonl (t->local_tid_dest);
- for (i = 0; i < t->nclients; i++)
- GNUNET_SERVER_notification_context_unicast (nc, t->clients[i]->handle,
- &msg.header, GNUNET_NO);
+ old = info->peer;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " timed out: %u\n", old);
+
+ if (0 < info->n_peers)
+ {
+ // Select next peer, put current in that spot.
+ id = info->peers[info->i_peer];
+ info->peers[info->i_peer] = info->peer;
+ info->i_peer = (info->i_peer + 1) % info->n_peers;
}
- // FIXME when to disconnect an incoming tunnel?
- else if (1 == t->nclients && NULL != t->owner)
+ else
{
- struct GNUNET_MESH_PeerControl msg;
-
- msg.header.size = htons (sizeof (msg));
- msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
- msg.tunnel_id = htonl (t->local_tid);
- msg.peer = my_full_id;
- GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
- &msg.header, GNUNET_NO);
+ // Try to connect to same peer again.
+ id = info->peer;
}
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " trying: %u\n", id);
+
+ peer_info = peer_info_get_short(id);
+ tunnel_add_peer (info->t, peer_info);
+ if (old != id)
+ tunnel_delete_peer (info->t, old);
+ peer_info_connect (peer_info, info->t);
+ info->timeout = GNUNET_SCHEDULER_add_delayed (connect_timeout,
+ ®ex_connect_timeout,
+ info);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Regex connect timeout END\n");
}
/**
- * Function called to notify a client about the socket
- * being ready to queue more data. "buf" will be
- * NULL and "size" zero if the socket was closed for
- * writing in the meantime.
+ * Cancel an ongoing regex search in the DHT and free all resources.
*
- * @param cls closure
- * @param size number of bytes available in buf
- * @param buf where the callee should write the message
- * @return number of bytes written to buf
+ * @param ctx The search context.
*/
-static size_t
-send_core_create_path (void *cls, size_t size, void *buf);
+static void
+regex_cancel_search(struct MeshRegexSearchContext *ctx)
+{
+ struct MeshRegexSearchInfo *info = ctx->info;
+ int i;
+ GNUNET_free (info->description);
+ GNUNET_CONTAINER_multihashmap_iterate (info->dht_get_handles,
+ ®ex_cancel_dht_get, NULL);
+ GNUNET_CONTAINER_multihashmap_iterate (info->dht_get_results,
+ ®ex_free_result, NULL);
+ GNUNET_CONTAINER_multihashmap_destroy (info->dht_get_results);
+ GNUNET_CONTAINER_multihashmap_destroy (info->dht_get_handles);
+ info->t->regex_ctx = NULL;
+ for (i = 0; i < info->n_contexts; i++)
+ {
+ GNUNET_free (info->contexts[i]);
+ }
+ if (0 < info->n_contexts)
+ GNUNET_free (info->contexts);
+ if (0 < info->n_peers)
+ GNUNET_free (info->peers);
+ if (GNUNET_SCHEDULER_NO_TASK != info->timeout)
+ {
+ GNUNET_SCHEDULER_cancel(info->timeout);
+ }
+ GNUNET_free (info);
+}
-/**
- * Function called to notify a client about the socket
- * being ready to queue more data. "buf" will be
- * NULL and "size" zero if the socket was closed for
- * writing in the meantime.
- *
- * @param cls closure (data itself)
- * @param size number of bytes available in buf
- * @param buf where the callee should write the message
- *
- * @return number of bytes written to buf
- */
-static size_t
-send_core_data_multicast (void *cls, size_t size, void *buf);
+/******************************************************************************/
+/************************ PERIODIC FUNCTIONS ****************************/
+/******************************************************************************/
/**
- * Decrements the reference counter and frees all resources if needed
+ * Announce iterator over for each application provided by the peer
*
- * @param mesh_data Data Descriptor used in a multicast message.
- * Freed no longer needed (last message).
+ * @param cls closure
+ * @param key current key code
+ * @param value value in the hash map
+ * @return GNUNET_YES if we should continue to
+ * iterate,
+ * GNUNET_NO if not.
*/
-static void
-data_descriptor_decrement_multicast (struct MeshData *mesh_data)
+static int
+announce_application (void *cls, const struct GNUNET_HashCode * key, void *value)
{
- /* Make sure it's a multicast packet */
- GNUNET_assert (NULL != mesh_data->reference_counter);
+ struct PBlock block;
+ struct MeshClient *c;
- if (0 == --(*(mesh_data->reference_counter)))
+ block.id = my_full_id;
+ c = GNUNET_CONTAINER_multihashmap_get (applications, key);
+ block.type = (long) GNUNET_CONTAINER_multihashmap_get (c->apps, key);
+ if (0 == block.type)
{
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Last copy!\n");
- if (NULL != mesh_data->task)
- {
- if (GNUNET_SCHEDULER_NO_TASK != *(mesh_data->task))
- {
- GNUNET_SCHEDULER_cancel (*(mesh_data->task));
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " notifying client...\n");
- GNUNET_SERVER_receive_done (mesh_data->t->owner->handle, GNUNET_OK);
- }
- GNUNET_free (mesh_data->task);
- }
- GNUNET_free (mesh_data->reference_counter);
- GNUNET_free (mesh_data->data);
- GNUNET_free (mesh_data);
+ GNUNET_break(0);
+ return GNUNET_YES;
}
+ block.type = htonl (block.type);
+
+ GNUNET_break (NULL !=
+ GNUNET_DHT_put (dht_handle, key,
+ dht_replication_level,
+ GNUNET_DHT_RO_RECORD_ROUTE |
+ GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
+ GNUNET_BLOCK_TYPE_MESH_PEER_BY_TYPE,
+ sizeof (block),
+ (const char *) &block,
+ GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
+ app_announce_time),
+ app_announce_time, NULL, NULL));
+ return GNUNET_OK;
}
/**
- * Cancel a core transmission that was already requested and free all resources
- * associated to the request.
+ * Periodically announce what applications are provided by local clients
+ * (by regex)
*
- * @param peer PeeInfo of the peer whose transmission is cancelled.
- * @param i Position of the transmission to be cancelled.
+ * @param cls closure
+ * @param tc task context
*/
static void
-peer_info_cancel_transmission (struct MeshPeerInfo *peer, unsigned int i)
+announce_regex (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- if (NULL != peer->core_transmit[i])
+ struct MeshClient *c = cls;
+ unsigned int i;
+
+ if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
{
- struct MeshTransmissionDescriptor *dd;
- struct MeshPathInfo *path_info;
+ c->regex_announce_task = GNUNET_SCHEDULER_NO_TASK;
+ return;
+ }
-#if MESH_DEBUG
- {
- struct GNUNET_PeerIdentity id;
+ DEBUG_DHT ("Starting PUT for regex\n");
- GNUNET_PEER_resolve (peer->id, &id);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " Cancelling data transmission at %s [%u]\n",
- GNUNET_i2s (&id), i);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " message type %u\n",
- peer->types[i]);
- }
-#endif
- /* TODO: notify that tranmission has failed */
- switch (peer->types[i])
- {
- case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
- case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
- case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type payload\n");
- dd = peer->infos[i];
- data_descriptor_decrement_multicast (dd->mesh_data);
- break;
- case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
- path_info = peer->infos[i];
- path_destroy (path_info->path);
- break;
- default:
- GNUNET_break (0);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type unknown!\n");
- }
- GNUNET_CORE_notify_transmit_ready_cancel (peer->core_transmit[i]);
- peer->core_transmit[i] = NULL;
- GNUNET_free (peer->infos[i]);
+ for (i = 0; i < c->n_regex; i++)
+ {
+ regex_put (c->regexes[i]);
}
+ c->regex_announce_task =
+ GNUNET_SCHEDULER_add_delayed (app_announce_time, &announce_regex, cls);
+ DEBUG_DHT ("Finished PUT for regex\n");
+
+ return;
}
/**
- * Get a unused CORE slot to transmit a message to a peer. If all the slots
- * are used, cancel one and return it's position.
- *
- * @param peer PeerInfo of the neighbor we want to transmit to.
+ * Periodically announce what applications are provided by local clients
+ * (by type)
*
- * @return The index of an available slot to transmit to the neighbor.
+ * @param cls closure
+ * @param tc task context
*/
-static unsigned int
-peer_info_transmit_slot (struct MeshPeerInfo *peer)
+static void
+announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- unsigned int i;
-
- for (i = 0; peer->core_transmit[i]; i++)
+ if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
{
- if (i == (CORE_QUEUE_SIZE - 1))
- {
- /* All positions are taken! Overwriting! */
- GNUNET_break (0);
- peer_info_cancel_transmission (peer, 0);
- return 0;
- }
+ announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
+ return;
}
- return i;
+
+ DEBUG_DHT ("Starting PUT for apps\n");
+
+ GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
+ NULL);
+ announce_applications_task =
+ GNUNET_SCHEDULER_add_delayed (app_announce_time, &announce_applications,
+ cls);
+ DEBUG_DHT ("Finished PUT for apps\n");
+
+ return;
}
/**
- * Retrieve the MeshPeerInfo stucture associated with the peer, create one
- * and insert it in the appropiate structures if the peer is not known yet.
- *
- * @param peer Full identity of the peer.
+ * Periodically announce self id in the DHT
*
- * @return Existing or newly created peer info.
+ * @param cls closure
+ * @param tc task context
*/
-static struct MeshPeerInfo *
-peer_info_get (const struct GNUNET_PeerIdentity *peer)
+static void
+announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct MeshPeerInfo *peer_info;
+ struct PBlock block;
- peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
- if (NULL == peer_info)
+ if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
{
- peer_info =
- (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
- GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
- peer_info->id = GNUNET_PEER_intern (peer);
+ announce_id_task = GNUNET_SCHEDULER_NO_TASK;
+ return;
}
+ /* TODO
+ * - Set data expiration in function of X
+ * - Adapt X to churn
+ */
+ DEBUG_DHT ("DHT_put for ID %s started.\n", GNUNET_i2s (&my_full_id));
- return peer_info;
+ block.id = my_full_id;
+ block.type = htonl (0);
+ GNUNET_DHT_put (dht_handle, /* DHT handle */
+ &my_full_id.hashPubKey, /* Key to use */
+ dht_replication_level, /* Replication level */
+ GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
+ GNUNET_BLOCK_TYPE_MESH_PEER, /* Block type */
+ sizeof (block), /* Size of the data */
+ (const char *) &block, /* Data itself */
+ GNUNET_TIME_UNIT_FOREVER_ABS, /* Data expiration */
+ GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
+ NULL, /* Continuation */
+ NULL); /* Continuation closure */
+ announce_id_task =
+ GNUNET_SCHEDULER_add_delayed (id_announce_time, &announce_id, cls);
}
-/**
- * Retrieve the MeshPeerInfo stucture associated with the peer, create one
- * and insert it in the appropiate structures if the peer is not known yet.
- *
- * @param peer Short identity of the peer.
- *
- * @return Existing or newly created peer info.
- */
-static struct MeshPeerInfo *
-peer_info_get_short (const GNUNET_PEER_Id peer)
-{
- struct GNUNET_PeerIdentity id;
-
- GNUNET_PEER_resolve (peer, &id);
- return peer_info_get (&id);
-}
-
+/******************************************************************************/
+/****************** GENERAL HELPER FUNCTIONS ************************/
+/******************************************************************************/
/**
- * Iterator to remove the tunnel from the list of tunnels a peer participates
- * in.
- *
- * @param cls Closure (tunnel info)
- * @param key GNUNET_PeerIdentity of the peer (unused)
- * @param value PeerInfo of the peer
+ * Decrements the reference counter and frees all resources if needed
*
- * @return always GNUNET_YES, to keep iterating
+ * @param mesh_data Data Descriptor used in a multicast message.
+ * Freed no longer needed (last message).
*/
-static int
-peer_info_delete_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
+static void
+data_descriptor_decrement_rc (struct MeshData *mesh_data)
{
- struct MeshTunnel *t = cls;
- struct MeshPeerInfo *peer = value;
- unsigned int i;
+ /* Make sure it's a multicast packet */
+ GNUNET_assert (NULL != mesh_data->reference_counter);
- for (i = 0; i < peer->ntunnels; i++)
+ if (0 == --(*(mesh_data->reference_counter)))
{
- if (0 ==
- memcmp (&peer->tunnels[i]->id, &t->id, sizeof (struct MESH_TunnelID)))
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Last copy!\n");
+ if (NULL != mesh_data->task)
{
- peer->ntunnels--;
- peer->tunnels[i] = peer->tunnels[peer->ntunnels];
- peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
- return GNUNET_YES;
+ if (GNUNET_SCHEDULER_NO_TASK != *(mesh_data->task))
+ {
+ GNUNET_SCHEDULER_cancel (*(mesh_data->task));
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " notifying client...\n");
+ GNUNET_SERVER_receive_done (mesh_data->t->owner->handle, GNUNET_OK);
+ }
+ GNUNET_free (mesh_data->task);
}
+ GNUNET_free (mesh_data->reference_counter);
+ GNUNET_free (mesh_data->data);
+ GNUNET_free (mesh_data);
}
- return GNUNET_YES;
}
/**
- * Core callback to write a
- *
- * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
- * @param size Number of bytes available in buf.
- * @param buf Where the to write the message.
- *
- * @return number of bytes written to buf
- */
-static size_t
-send_core_data_raw (void *cls, size_t size, void *buf)
+ * Check if client has registered with the service and has not disconnected
+ *
+ * @param client the client to check
+ *
+ * @return non-NULL if client exists in the global DLL
+ */
+static struct MeshClient *
+client_get (struct GNUNET_SERVER_Client *client)
{
- struct MeshTransmissionDescriptor *info = cls;
- struct GNUNET_MessageHeader *msg;
- size_t total_size;
-
- GNUNET_assert (NULL != info);
- GNUNET_assert (NULL != info->mesh_data);
- msg = (struct GNUNET_MessageHeader *) info->mesh_data->data;
- total_size = ntohs (msg->size);
+ struct MeshClient *c;
- if (total_size > size)
+ c = clients;
+ while (NULL != c)
{
- struct GNUNET_PeerIdentity id;
-
- GNUNET_PEER_resolve (info->peer->id, &id);
- info->peer->core_transmit[info->handler_n] =
- GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
- GNUNET_TIME_UNIT_FOREVER_REL, &id,
- size, &send_core_data_raw, info);
- return 0;
+ if (c->handle == client)
+ return c;
+ c = c->next;
}
- info->peer->core_transmit[info->handler_n] = NULL;
- memcpy (buf, msg, total_size);
- GNUNET_free (info->mesh_data);
- GNUNET_free (info);
- return total_size;
+ return NULL;
}
/**
- * Sends an already built message to a peer, properly registrating
- * all used resources.
+ * Checks if a given client has subscribed to certain message type
*
- * @param message Message to send. Fucntion makes a copy of it.
- * @param peer Short ID of the neighbor whom to send the message.
+ * @param message_type Type of message to check
+ * @param c Client to check
*
- * FIXME tunnel?
+ * @return GNUNET_YES or GNUNET_NO, depending on subscription status
+ *
+ * FIXME: use of crypto_hash slows it down
+ * The hash function alone takes 8-10us out of the ~55us for the whole
+ * process of retransmitting the message from one local client to another.
+ * Find faster implementation!
*/
-static void
-send_message (const struct GNUNET_MessageHeader *message,
- const struct GNUNET_PeerIdentity *peer)
+static int
+client_is_subscribed (uint16_t message_type, struct MeshClient *c)
{
- struct MeshTransmissionDescriptor *info;
- struct MeshPeerInfo *neighbor;
- struct MeshPeerPath *p;
- unsigned int i;
- size_t size;
-
-// GNUNET_TRANSPORT_try_connect();
+ struct GNUNET_HashCode hc;
- size = ntohs (message->size);
- info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
- info->mesh_data = GNUNET_malloc (sizeof (struct MeshData));
- info->mesh_data->data = GNUNET_malloc (size);
- memcpy (info->mesh_data->data, message, size);
- info->mesh_data->data_len = size;
- neighbor = peer_info_get (peer);
- for (p = neighbor->path_head; NULL != p; p = p->next)
- {
- if (2 == p->length)
- {
- break;
- }
- }
- if (NULL == p)
- {
- GNUNET_break (0);
- GNUNET_free (info->mesh_data->data);
- GNUNET_free (info->mesh_data);
- GNUNET_free (info);
- return;
- }
- i = peer_info_transmit_slot (neighbor);
- info->handler_n = i;
- info->peer = neighbor;
- neighbor->types[i] = GNUNET_MESSAGE_TYPE_MESH_UNICAST;
- neighbor->infos[i] = info;
- neighbor->core_transmit[i] =
- GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
- GNUNET_TIME_UNIT_FOREVER_REL, peer,
- size, &send_core_data_raw, info);
+ if (NULL == c->types)
+ return GNUNET_NO;
+ GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
+ return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
}
/**
- * Sends a CREATE PATH message for a path to a peer, properly registrating
- * all used resources.
+ * Allow a client to send more data after transmitting a multicast message
+ * which some neighbor has not yet accepted altough a reasonable time has
+ * passed.
*
- * @param peer PeerInfo of the final peer for whom this path is being created.
- * @param p Path itself.
- * @param t Tunnel for which the path is created.
+ * @param cls Closure (DataDescriptor containing the task identifier)
+ * @param tc Task Context
+ *
+ * FIXME reference counter cshould be just int
*/
static void
-send_create_path (struct MeshPeerInfo *peer, struct MeshPeerPath *p,
- struct MeshTunnel *t)
+client_allow_send (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct GNUNET_PeerIdentity id;
- struct MeshPathInfo *path_info;
- struct MeshPeerInfo *neighbor;
- unsigned int i;
+ struct MeshData *mdata = cls;
- if (NULL == p)
- {
- p = tree_get_path_to_peer (t->tree, peer->id);
- if (NULL == p)
- {
- GNUNET_break (0);
- return;
- }
- }
- for (i = 0; i < p->length; i++)
- {
- if (p->peers[i] == myid)
- break;
- }
- if (i >= p->length - 1)
- {
- path_destroy (p);
- GNUNET_break (0);
+ if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
return;
- }
- GNUNET_PEER_resolve (p->peers[i + 1], &id);
-
- path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
- path_info->path = p;
- path_info->t = t;
- neighbor = peer_info_get (&id);
- path_info->peer = neighbor;
- path_info->pos = peer_info_transmit_slot (neighbor);
- neighbor->types[path_info->pos] = GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE;
- neighbor->infos[path_info->pos] = path_info;
- neighbor->core_transmit[path_info->pos] =
- GNUNET_CORE_notify_transmit_ready (core_handle, /* handle */
- 0, /* cork */
- 0, /* priority */
- GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
- &id, /* target */
- sizeof (struct GNUNET_MESH_ManipulatePath) +
- (p->length * sizeof (struct GNUNET_PeerIdentity)), /*size */
- &send_core_create_path, /* callback */
- path_info); /* cls */
+ GNUNET_assert (NULL != mdata->reference_counter);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "CLIENT ALLOW SEND DESPITE %u COPIES PENDING\n",
+ *(mdata->reference_counter));
+ *(mdata->task) = GNUNET_SCHEDULER_NO_TASK;
+ GNUNET_SERVER_receive_done (mdata->t->owner->handle, GNUNET_OK);
}
/**
- * Sends a DESTROY PATH message to free resources for a path in a tunnel
+ * Check whether client wants traffic from a tunnel.
*
- * @param t Tunnel whose path to destroy.
- * @param destination Short ID of the peer to whom the path to destroy.
+ * @param c Client to check.
+ * @param t Tunnel to be found.
+ *
+ * @return GNUNET_YES if client knows tunnel.
+ *
+ * TODO look in client hashmap
*/
-static void
-send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
+static int
+client_wants_tunnel (struct MeshClient *c, struct MeshTunnel *t)
{
- struct MeshPeerPath *p;
- size_t size;
-
- p = tree_get_path_to_peer (t->tree, destination);
- if (NULL == p)
- {
- GNUNET_break (0);
- return;
- }
- size = sizeof (struct GNUNET_MESH_ManipulatePath);
- size += p->length * sizeof (struct GNUNET_PeerIdentity);
- {
- struct GNUNET_MESH_ManipulatePath *msg;
- struct GNUNET_PeerIdentity *pi;
- char cbuf[size];
- unsigned int i;
+ unsigned int i;
- msg = (struct GNUNET_MESH_ManipulatePath *) cbuf;
- msg->header.size = htons (size);
- msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
- msg->tid = htonl (t->id.tid);
- pi = (struct GNUNET_PeerIdentity *) &msg[1];
- for (i = 0; i < p->length; i++)
- {
- GNUNET_PEER_resolve (p->peers[i], &pi[i]);
- }
- send_message (&msg->header, tree_get_first_hop (t->tree, destination));
- }
- path_destroy (p);
+ for (i = 0; i < t->nclients; i++)
+ if (t->clients[i] == c)
+ return GNUNET_YES;
+ return GNUNET_NO;
}
/**
- * Try to establish a new connection to this peer.
- * Use the best path for the given tunnel.
- * If the peer doesn't have any path to it yet, try to get one.
- * If the peer already has some path, send a CREATE PATH towards it.
+ * Check whether client has been informed about a tunnel.
*
- * @param peer PeerInfo of the peer.
- * @param t Tunnel for which to create the path, if possible.
+ * @param c Client to check.
+ * @param t Tunnel to be found.
+ *
+ * @return GNUNET_YES if client knows tunnel.
+ *
+ * TODO look in client hashmap
*/
-static void
-peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
+static int
+client_knows_tunnel (struct MeshClient *c, struct MeshTunnel *t)
{
- struct MeshPeerPath *p;
- struct MeshPathInfo *path_info;
-
- if (NULL != peer->path_head)
- {
- p = tree_get_path_to_peer (t->tree, peer->id);
- if (NULL == p)
- {
- GNUNET_break (0);
- return;
- }
-
- // FIXME always send create path to self
- if (p->length > 1)
- {
- send_create_path (peer, p, t);
- }
- else
- {
- GNUNET_HashCode hash;
-
- path_destroy (p);
- send_client_peer_connected (t, myid);
- t->local_tid_dest = next_local_tid++;
- GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
- &hash);
- if (GNUNET_OK !=
- GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
- {
- GNUNET_break (0);
- return;
- }
- }
- }
- else if (NULL == peer->dhtget)
- {
- struct GNUNET_PeerIdentity id;
+ unsigned int i;
- GNUNET_PEER_resolve (peer->id, &id);
- path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
- path_info->peer = peer;
- path_info->t = t;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
- peer->dhtgetcls = path_info;
- peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
- GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
- GNUNET_BLOCK_TYPE_TEST, /* type */
- &id.hashPubKey, /* key to search */
- 10U, /* replication level */
- GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, NULL, /* xquery */
- 0, /* xquery bits */
- &dht_get_id_handler, path_info);
- }
- /* Otherwise, there is no path but the DHT get is already started. */
+ for (i = 0; i < t->nignore; i++)
+ if (t->ignore[i] == c)
+ return GNUNET_YES;
+ return client_wants_tunnel(c, t);
}
/**
- * Task to delay the connection of a peer
+ * Marks a client as uninterested in traffic from the tunnel, updating both
+ * client and tunnel to reflect this.
*
- * @param cls Closure (path info with tunnel and peer to connect).
- * Will be free'd on exection.
- * @param tc TaskContext
+ * @param c Client that doesn't want traffic anymore.
+ * @param t Tunnel which should be ignored.
+ *
+ * FIXME when to delete an incoming tunnel?
*/
static void
-peer_info_connect_task (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+client_ignore_tunnel (struct MeshClient *c, struct MeshTunnel *t)
{
- struct MeshPathInfo *path_info = cls;
+ struct GNUNET_HashCode hash;
- if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
- {
- GNUNET_free (cls);
- return;
- }
- peer_info_connect (path_info->peer, path_info->t);
- GNUNET_free (cls);
+ GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
+ GNUNET_break (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
+ &hash, t));
+ GNUNET_break (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_put (c->ignore_tunnels, &hash, t,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
+ tunnel_delete_active_client (t, c);
+ GNUNET_array_append (t->ignore, t->nignore, c);
}
/**
- * Destroy the peer_info and free any allocated resources linked to it
- *
- * @param pi The peer_info to destroy.
+ * Deletes a tunnel from a client (either owner or destination). To be used on
+ * tunnel destroy, otherwise, use client_ignore_tunnel.
*
- * @return GNUNET_OK on success
+ * @param c Client whose tunnel to delete.
+ * @param t Tunnel which should be deleted.
*/
-static int
-peer_info_destroy (struct MeshPeerInfo *pi)
+static void
+client_delete_tunnel (struct MeshClient *c, struct MeshTunnel *t)
{
- struct GNUNET_PeerIdentity id;
- struct MeshPeerPath *p;
- struct MeshPeerPath *nextp;
- unsigned int i;
+ struct GNUNET_HashCode hash;
- GNUNET_PEER_resolve (pi->id, &id);
- GNUNET_PEER_change_rc (pi->id, -1);
-
- if (GNUNET_YES !=
- GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
- {
- GNUNET_break (0);
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
- }
- if (NULL != pi->dhtget)
- {
- GNUNET_DHT_get_stop (pi->dhtget);
- GNUNET_free (pi->dhtgetcls);
- }
- for (i = 0; i < CORE_QUEUE_SIZE; i++)
+ if (c == t->owner)
{
- peer_info_cancel_transmission (pi, i);
+ GNUNET_CRYPTO_hash(&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels,
+ &hash,
+ t));
}
- p = pi->path_head;
- while (NULL != p)
+ else
{
- nextp = p->next;
- GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
- path_destroy (p);
- p = nextp;
+ GNUNET_CRYPTO_hash(&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
+ // FIXME XOR?
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
+ &hash,
+ t) ||
+ GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels,
+ &hash,
+ t));
}
- GNUNET_free (pi);
- return GNUNET_OK;
}
/**
- * Remove all paths that rely on a direct connection between p1 and p2
- * from the peer itself and notify all tunnels about it.
- *
- * @param peer PeerInfo of affected peer.
- * @param p1 GNUNET_PEER_Id of one peer.
- * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
- * no longer is.
+ * Send the message to all clients that have subscribed to its type
*
- * TODO: optimize (see below)
+ * @param msg Pointer to the message itself
+ * @param payload Pointer to the payload of the message.
+ * @param t The tunnel to whose clients this message goes.
+ *
+ * @return number of clients this message was sent to
*/
-static void
-peer_info_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
- GNUNET_PEER_Id p2)
+static unsigned int
+send_subscribed_clients (const struct GNUNET_MessageHeader *msg,
+ const struct GNUNET_MessageHeader *payload,
+ struct MeshTunnel *t)
{
- struct MeshPeerPath *p;
- struct MeshPeerPath *aux;
- struct MeshPeerInfo *peer_d;
- GNUNET_PEER_Id d;
- unsigned int destroyed;
- unsigned int best;
- unsigned int cost;
- unsigned int i;
+ struct MeshClient *c;
+ MESH_TunnelNumber *tid;
+ unsigned int count;
+ uint16_t type;
+ char cbuf[htons (msg->size)];
- destroyed = 0;
- p = peer->path_head;
- while (NULL != p)
+ type = ntohs (payload->type);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending to clients...\n");
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "message of type %s\n",
+ GNUNET_MESH_DEBUG_M2S (type));
+
+ memcpy (cbuf, msg, sizeof (cbuf));
+ switch (htons (msg->type))
{
- aux = p->next;
- for (i = 0; i < (p->length - 1); i++)
+ struct GNUNET_MESH_Unicast *uc;
+ struct GNUNET_MESH_Multicast *mc;
+ struct GNUNET_MESH_ToOrigin *to;
+
+ case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
+ uc = (struct GNUNET_MESH_Unicast *) cbuf;
+ tid = &uc->tid;
+ break;
+ case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
+ mc = (struct GNUNET_MESH_Multicast *) cbuf;
+ tid = &mc->tid;
+ break;
+ case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
+ to = (struct GNUNET_MESH_ToOrigin *) cbuf;
+ tid = &to->tid;
+ break;
+ default:
+ GNUNET_break (0);
+ return 0;
+ }
+
+ for (count = 0, c = clients; c != NULL; c = c->next)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client %u\n", c->id);
+ if (client_is_subscribed (type, c))
{
- if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
- (p->peers[i] == p2 && p->peers[i + 1] == p1))
+ if (htons (msg->type) == GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN)
{
- GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
- path_destroy (p);
- destroyed++;
- break;
+ if (c != t->owner)
+ continue;
+ *tid = htonl (t->local_tid);
+ }
+ else
+ {
+ if (GNUNET_NO == client_knows_tunnel (c, t))
+ {
+ /* This client doesn't know the tunnel */
+ struct GNUNET_MESH_TunnelNotification tmsg;
+ struct GNUNET_HashCode hash;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending tunnel create\n");
+ tmsg.header.size = htons (sizeof (tmsg));
+ tmsg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
+ GNUNET_PEER_resolve (t->id.oid, &tmsg.peer);
+ tmsg.tunnel_id = htonl (t->local_tid_dest);
+ GNUNET_SERVER_notification_context_unicast (nc, c->handle,
+ &tmsg.header, GNUNET_NO);
+ tunnel_add_client (t, c);
+ GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
+ &hash);
+ GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
+ c->incoming_tunnels, &hash, t,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
+ }
+ *tid = htonl (t->local_tid_dest);
}
+
+ /* Check if the client wants to get traffic from the tunnel */
+ if (GNUNET_NO == client_wants_tunnel(c, t))
+ continue;
+ count++;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending\n");
+ GNUNET_SERVER_notification_context_unicast (nc, c->handle,
+ (struct GNUNET_MessageHeader
+ *) cbuf, GNUNET_NO);
}
- p = aux;
}
- if (0 == destroyed)
- return;
+
+ return count;
+}
+
+
+/**
+ * Notify the client that owns the tunnel that a peer has connected to it
+ * (the requested path to it has been confirmed).
+ *
+ * @param t Tunnel whose owner to notify
+ * @param id Short id of the peer that has connected
+ */
+static void
+send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
+{
+ struct GNUNET_MESH_PeerControl pc;
+
+ pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
+ pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
+ pc.tunnel_id = htonl (t->local_tid);
+ GNUNET_PEER_resolve (id, &pc.peer);
+ GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle, &pc.header,
+ GNUNET_NO);
+}
+
+
+/**
+ * Notify all clients (not depending on registration status) that the incoming
+ * tunnel is no longer valid.
+ *
+ * @param t Tunnel that was destroyed.
+ */
+static void
+send_clients_tunnel_destroy (struct MeshTunnel *t)
+{
+ struct GNUNET_MESH_TunnelMessage msg;
+
+ msg.header.size = htons (sizeof (msg));
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
+ msg.tunnel_id = htonl (t->local_tid_dest);
+ GNUNET_SERVER_notification_context_broadcast (nc, &msg.header, GNUNET_NO);
+}
+
+
+/**
+ * Notify clients of tunnel disconnections, if needed.
+ * In case the origin disconnects, the destination clients get a tunnel destroy
+ * notification. If the last destination disconnects (only one remaining client
+ * in tunnel), the origin gets a (local ID) peer disconnected.
+ * Note that the function must be called BEFORE removing the client from
+ * the tunnel.
+ *
+ * @param t Tunnel that was destroyed.
+ * @param c Client that disconnected.
+ */
+static void
+send_client_tunnel_disconnect (struct MeshTunnel *t, struct MeshClient *c)
+{
+ unsigned int i;
+
+ if (c == t->owner)
+ {
+ struct GNUNET_MESH_TunnelMessage msg;
+
+ msg.header.size = htons (sizeof (msg));
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
+ msg.tunnel_id = htonl (t->local_tid_dest);
+ for (i = 0; i < t->nclients; i++)
+ GNUNET_SERVER_notification_context_unicast (nc, t->clients[i]->handle,
+ &msg.header, GNUNET_NO);
+ }
+ // FIXME when to disconnect an incoming tunnel?
+ else if (1 == t->nclients && NULL != t->owner)
+ {
+ struct GNUNET_MESH_PeerControl msg;
+
+ msg.header.size = htons (sizeof (msg));
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
+ msg.tunnel_id = htonl (t->local_tid);
+ msg.peer = my_full_id;
+ GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
+ &msg.header, GNUNET_NO);
+ }
+}
+
+
+/**
+ * Retrieve the MeshPeerInfo stucture associated with the peer, create one
+ * and insert it in the appropiate structures if the peer is not known yet.
+ *
+ * @param peer Full identity of the peer.
+ *
+ * @return Existing or newly created peer info.
+ */
+static struct MeshPeerInfo *
+peer_info_get (const struct GNUNET_PeerIdentity *peer)
+{
+ struct MeshPeerInfo *peer_info;
+
+ peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
+ if (NULL == peer_info)
+ {
+ peer_info =
+ (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
+ GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
+ peer_info->id = GNUNET_PEER_intern (peer);
+ }
+
+ return peer_info;
+}
+
+
+/**
+ * Retrieve the MeshPeerInfo stucture associated with the peer, create one
+ * and insert it in the appropiate structures if the peer is not known yet.
+ *
+ * @param peer Short identity of the peer.
+ *
+ * @return Existing or newly created peer info.
+ */
+static struct MeshPeerInfo *
+peer_info_get_short (const GNUNET_PEER_Id peer)
+{
+ struct GNUNET_PeerIdentity id;
+
+ GNUNET_PEER_resolve (peer, &id);
+ return peer_info_get (&id);
+}
+
+
+/**
+ * Iterator to remove the tunnel from the list of tunnels a peer participates
+ * in.
+ *
+ * @param cls Closure (tunnel info)
+ * @param key GNUNET_PeerIdentity of the peer (unused)
+ * @param value PeerInfo of the peer
+ *
+ * @return always GNUNET_YES, to keep iterating
+ */
+static int
+peer_info_delete_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
+{
+ struct MeshTunnel *t = cls;
+ struct MeshPeerInfo *peer = value;
+ unsigned int i;
for (i = 0; i < peer->ntunnels; i++)
{
- d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
- if (0 == d)
- continue;
- /* TODO
- * Problem: one or more peers have been deleted from the tunnel tree.
- * We don't know who they are to try to add them again.
- * We need to try to find a new path for each of the disconnected peers.
- * Some of them might already have a path to reach them that does not
- * involve p1 and p2. Adding all anew might render in a better tree than
- * the trivial immediate fix.
- *
- * Trivial immiediate fix: try to reconnect to the disconnected node. All
- * its children will be reachable trough him.
- */
- peer_d = peer_info_get_short (d);
- best = UINT_MAX;
- aux = NULL;
- for (p = peer_d->path_head; NULL != p; p = p->next)
+ if (0 ==
+ memcmp (&peer->tunnels[i]->id, &t->id, sizeof (struct MESH_TunnelID)))
{
- if ((cost = tree_get_path_cost (peer->tunnels[i]->tree, p)) < best)
- {
- best = cost;
- aux = p;
+ peer->ntunnels--;
+ peer->tunnels[i] = peer->tunnels[peer->ntunnels];
+ peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
+ return GNUNET_YES;
+ }
+ }
+ return GNUNET_YES;
+}
+
+
+/**
+ * Core callback to write a pre-constructed data packet to core buffer
+ *
+ * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
+ * @param size Number of bytes available in buf.
+ * @param buf Where the to write the message.
+ *
+ * @return number of bytes written to buf
+ */
+static size_t
+send_core_data_raw (void *cls, size_t size, void *buf)
+{
+ struct MeshTransmissionDescriptor *info = cls;
+ struct GNUNET_MessageHeader *msg;
+ size_t total_size;
+
+ GNUNET_assert (NULL != info);
+ GNUNET_assert (NULL != info->mesh_data);
+ msg = (struct GNUNET_MessageHeader *) info->mesh_data->data;
+ total_size = ntohs (msg->size);
+
+ if (total_size > size)
+ {
+ GNUNET_break (0);
+ return 0;
+ }
+ memcpy (buf, msg, total_size);
+ data_descriptor_decrement_rc (info->mesh_data);
+ GNUNET_free (info);
+ return total_size;
+}
+
+
+/**
+ * Sends an already built non-multicast message to a peer,
+ * properly registrating all used resources.
+ *
+ * @param message Message to send. Function makes a copy of it.
+ * @param peer Short ID of the neighbor whom to send the message.
+ * @param t Tunnel on which this message is transmitted.
+ */
+static void
+send_message (const struct GNUNET_MessageHeader *message,
+ const struct GNUNET_PeerIdentity *peer,
+ struct MeshTunnel *t)
+{
+ struct MeshTransmissionDescriptor *info;
+ struct MeshPeerInfo *neighbor;
+ struct MeshPeerPath *p;
+ size_t size;
+ uint16_t type;
+
+// GNUNET_TRANSPORT_try_connect(); FIXME use?
+
+ size = ntohs (message->size);
+ info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
+ info->mesh_data = GNUNET_malloc (sizeof (struct MeshData));
+ info->mesh_data->data = GNUNET_malloc (size);
+ memcpy (info->mesh_data->data, message, size);
+ type = ntohs(message->type);
+ if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type)
+ {
+ struct GNUNET_MESH_Unicast *m;
+
+ m = (struct GNUNET_MESH_Unicast *) info->mesh_data->data;
+ m->ttl = htonl (ntohl (m->ttl) - 1);
+ }
+ info->mesh_data->data_len = size;
+ info->mesh_data->reference_counter = GNUNET_malloc (sizeof (unsigned int));
+ *info->mesh_data->reference_counter = 1;
+ neighbor = peer_info_get (peer);
+ for (p = neighbor->path_head; NULL != p; p = p->next)
+ {
+ if (2 >= p->length)
+ {
+ break;
+ }
+ }
+ if (NULL == p)
+ {
+#if MESH_DEBUG
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " %s IS NOT DIRECTLY CONNECTED\n",
+ GNUNET_i2s(peer));
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " PATHS TO %s:\n",
+ GNUNET_i2s(peer));
+ for (p = neighbor->path_head; NULL != p; p = p->next)
+ {
+ struct GNUNET_PeerIdentity debug_id;
+ unsigned int i;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " path with %u hops through:\n",
+ p->length);
+ for (i = 0; i < p->length; i++)
+ {
+ GNUNET_PEER_resolve(p->peers[i], &debug_id);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " hop %u: %s\n",
+ i, GNUNET_i2s(&debug_id));
+ }
+ }
+#endif
+ GNUNET_break (0); // FIXME sometimes fails (testing disconnect?)
+ GNUNET_free (info->mesh_data->data);
+ GNUNET_free (info->mesh_data);
+ GNUNET_free (info);
+ return;
+ }
+ info->peer = neighbor;
+ if (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK == type)
+ {
+ /*
+ * TODO: in this case we only need the service to retransmit
+ * the message down the path. If we pass the real type to queue_add,
+ * queue_send will try to build the message from scratch. This can
+ * probably be done by some other way instead of deleteing the type
+ * info.
+ */
+ type = 0;
+ }
+ queue_add (info,
+ type,
+ size,
+ neighbor,
+ t);
+}
+
+
+/**
+ * Sends a CREATE PATH message for a path to a peer, properly registrating
+ * all used resources.
+ *
+ * @param peer PeerInfo of the final peer for whom this path is being created.
+ * @param p Path itself.
+ * @param t Tunnel for which the path is created.
+ */
+static void
+send_create_path (struct MeshPeerInfo *peer, struct MeshPeerPath *p,
+ struct MeshTunnel *t)
+{
+ struct GNUNET_PeerIdentity id;
+ struct MeshPathInfo *path_info;
+ struct MeshPeerInfo *neighbor;
+
+ unsigned int i;
+
+ if (NULL == p)
+ {
+ p = tree_get_path_to_peer (t->tree, peer->id);
+ if (NULL == p)
+ {
+ GNUNET_break (0);
+ return;
+ }
+ }
+ for (i = 0; i < p->length; i++)
+ {
+ if (p->peers[i] == myid)
+ break;
+ }
+ if (i >= p->length - 1)
+ {
+ path_destroy (p);
+ GNUNET_break (0);
+ return;
+ }
+ GNUNET_PEER_resolve (p->peers[i + 1], &id);
+
+ path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
+ path_info->path = p;
+ path_info->t = t;
+ neighbor = peer_info_get (&id);
+ path_info->peer = neighbor;
+ queue_add (path_info,
+ GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE,
+ sizeof (struct GNUNET_MESH_ManipulatePath) +
+ (p->length * sizeof (struct GNUNET_PeerIdentity)),
+ neighbor,
+ t);
+}
+
+
+/**
+ * Sends a DESTROY PATH message to free resources for a path in a tunnel
+ *
+ * @param t Tunnel whose path to destroy.
+ * @param destination Short ID of the peer to whom the path to destroy.
+ */
+static void
+send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
+{
+ struct MeshPeerPath *p;
+ size_t size;
+
+ p = tree_get_path_to_peer (t->tree, destination);
+ if (NULL == p)
+ {
+ GNUNET_break (0);
+ return;
+ }
+ size = sizeof (struct GNUNET_MESH_ManipulatePath);
+ size += p->length * sizeof (struct GNUNET_PeerIdentity);
+ {
+ struct GNUNET_MESH_ManipulatePath *msg;
+ struct GNUNET_PeerIdentity *pi;
+ char cbuf[size];
+ unsigned int i;
+
+ msg = (struct GNUNET_MESH_ManipulatePath *) cbuf;
+ msg->header.size = htons (size);
+ msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
+ msg->tid = htonl (t->id.tid);
+ pi = (struct GNUNET_PeerIdentity *) &msg[1];
+ for (i = 0; i < p->length; i++)
+ {
+ GNUNET_PEER_resolve (p->peers[i], &pi[i]);
+ }
+ send_message (&msg->header, tree_get_first_hop (t->tree, destination), t);
+ }
+ path_destroy (p);
+}
+
+
+/**
+ * Try to establish a new connection to this peer.
+ * Use the best path for the given tunnel.
+ * If the peer doesn't have any path to it yet, try to get one.
+ * If the peer already has some path, send a CREATE PATH towards it.
+ *
+ * @param peer PeerInfo of the peer.
+ * @param t Tunnel for which to create the path, if possible.
+ */
+static void
+peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
+{
+ struct MeshPeerPath *p;
+ struct MeshPathInfo *path_info;
+
+ if (NULL != peer->path_head)
+ {
+ p = tree_get_path_to_peer (t->tree, peer->id);
+ if (NULL == p)
+ {
+ GNUNET_break (0);
+ return;
+ }
+
+ // FIXME always send create path to self
+ if (p->length > 1)
+ {
+ send_create_path (peer, p, t);
+ }
+ else
+ {
+ struct GNUNET_HashCode hash;
+
+ path_destroy (p);
+ send_client_peer_connected (t, myid);
+ t->local_tid_dest = next_local_tid++;
+ GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
+ &hash);
+ if (GNUNET_OK !=
+ GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
+ {
+ GNUNET_break (0);
+ return;
+ }
+ }
+ }
+ else if (NULL == peer->dhtget)
+ {
+ struct GNUNET_PeerIdentity id;
+
+ GNUNET_PEER_resolve (peer->id, &id);
+ path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
+ path_info->peer = peer;
+ path_info->t = t;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
+ peer->dhtgetcls = path_info;
+ peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
+ GNUNET_BLOCK_TYPE_MESH_PEER, /* type */
+ &id.hashPubKey, /* key to search */
+ dht_replication_level, /* replication level */
+ GNUNET_DHT_RO_RECORD_ROUTE |
+ GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
+ NULL, /* xquery */ // FIXME BLOOMFILTER
+ 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
+ &dht_get_id_handler, path_info);
+ }
+ /* Otherwise, there is no path but the DHT get is already started. */
+}
+
+
+/**
+ * Task to delay the connection of a peer
+ *
+ * @param cls Closure (path info with tunnel and peer to connect).
+ * Will be free'd on exection.
+ * @param tc TaskContext
+ */
+static void
+peer_info_connect_task (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct MeshPathInfo *path_info = cls;
+
+ if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
+ {
+ GNUNET_free (cls);
+ return;
+ }
+ peer_info_connect (path_info->peer, path_info->t);
+ GNUNET_free (cls);
+}
+
+
+/**
+ * Destroy the peer_info and free any allocated resources linked to it
+ *
+ * @param pi The peer_info to destroy.
+ *
+ * @return GNUNET_OK on success
+ */
+static int
+peer_info_destroy (struct MeshPeerInfo *pi)
+{
+ struct GNUNET_PeerIdentity id;
+ struct MeshPeerPath *p;
+ struct MeshPeerPath *nextp;
+
+ GNUNET_PEER_resolve (pi->id, &id);
+ GNUNET_PEER_change_rc (pi->id, -1);
+
+ if (GNUNET_YES !=
+ GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
+ {
+ GNUNET_break (0);
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
+ }
+ if (NULL != pi->dhtget)
+ {
+ GNUNET_DHT_get_stop (pi->dhtget);
+ GNUNET_free (pi->dhtgetcls);
+ }
+ p = pi->path_head;
+ while (NULL != p)
+ {
+ nextp = p->next;
+ GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
+ path_destroy (p);
+ p = nextp;
+ }
+ GNUNET_free (pi);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Remove all paths that rely on a direct connection between p1 and p2
+ * from the peer itself and notify all tunnels about it.
+ *
+ * @param peer PeerInfo of affected peer.
+ * @param p1 GNUNET_PEER_Id of one peer.
+ * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
+ * no longer is.
+ *
+ * TODO: optimize (see below)
+ */
+static void
+peer_info_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
+ GNUNET_PEER_Id p2)
+{
+ struct MeshPeerPath *p;
+ struct MeshPeerPath *aux;
+ struct MeshPeerInfo *peer_d;
+ GNUNET_PEER_Id d;
+ unsigned int destroyed;
+ unsigned int best;
+ unsigned int cost;
+ unsigned int i;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
+ destroyed = 0;
+ p = peer->path_head;
+ while (NULL != p)
+ {
+ aux = p->next;
+ for (i = 0; i < (p->length - 1); i++)
+ {
+ if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
+ (p->peers[i] == p2 && p->peers[i + 1] == p1))
+ {
+ GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
+ path_destroy (p);
+ destroyed++;
+ break;
+ }
+ }
+ p = aux;
+ }
+ if (0 == destroyed)
+ return;
+
+ for (i = 0; i < peer->ntunnels; i++)
+ {
+ d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
+ if (0 == d)
+ continue;
+ /* TODO
+ * Problem: one or more peers have been deleted from the tunnel tree.
+ * We don't know who they are to try to add them again.
+ * We need to try to find a new path for each of the disconnected peers.
+ * Some of them might already have a path to reach them that does not
+ * involve p1 and p2. Adding all anew might render in a better tree than
+ * the trivial immediate fix.
+ *
+ * Trivial immiediate fix: try to reconnect to the disconnected node. All
+ * its children will be reachable trough him.
+ */
+ peer_d = peer_info_get_short (d);
+ best = UINT_MAX;
+ aux = NULL;
+ for (p = peer_d->path_head; NULL != p; p = p->next)
+ {
+ if ((cost = tree_get_path_cost (peer->tunnels[i]->tree, p)) < best)
+ {
+ best = cost;
+ aux = p;
+ }
+ }
+ if (NULL != aux)
+ {
+ /* No callback, as peer will be already disconnected and a connection
+ * scheduled by tunnel_notify_connection_broken.
+ */
+ tree_add_path (peer->tunnels[i]->tree, aux, NULL, NULL);
+ }
+ else
+ {
+ peer_info_connect (peer_d, peer->tunnels[i]);
+ }
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
+}
+
+
+/**
+ * Add the path to the peer and update the path used to reach it in case this
+ * is the shortest.
+ *
+ * @param peer_info Destination peer to add the path to.
+ * @param path New path to add. Last peer must be the peer in arg 1.
+ * Path will be either used of freed if already known.
+ * @param trusted Do we trust that this path is real?
+ */
+void
+peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
+ int trusted)
+{
+ struct MeshPeerPath *aux;
+ unsigned int l;
+ unsigned int l2;
+
+ if ((NULL == peer_info) || (NULL == path))
+ {
+ GNUNET_break (0);
+ path_destroy (path);
+ return;
+ }
+ if (path->peers[path->length - 1] != peer_info->id)
+ {
+ GNUNET_break (0);
+ path_destroy (path);
+ return;
+ }
+ if (path->length <= 2 && GNUNET_NO == trusted)
+ {
+ /* Only allow CORE to tell us about direct paths */
+ path_destroy (path);
+ return;
+ }
+ GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
+ for (l = 1; l < path->length; l++)
+ {
+ if (path->peers[l] == myid)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
+ for (l2 = 0; l2 < path->length - l; l2++)
+ {
+ path->peers[l2] = path->peers[l + l2];
+ }
+ path->length -= l;
+ l = 1;
+ path->peers =
+ GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
+ }
+ }
+#if MESH_DEBUG
+ {
+ struct GNUNET_PeerIdentity id;
+
+ GNUNET_PEER_resolve (peer_info->id, &id);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
+ path->length, GNUNET_i2s (&id));
+ }
+#endif
+ l = path_get_length (path);
+ if (0 == l)
+ {
+ GNUNET_free (path);
+ return;
+ }
+
+ GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
+ for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
+ {
+ l2 = path_get_length (aux);
+ if (l2 > l)
+ {
+ GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
+ peer_info->path_tail, aux, path);
+ return;
+ }
+ else
+ {
+ if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
+ {
+ path_destroy (path);
+ return;
}
}
- if (NULL != aux)
+ }
+ GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
+ path);
+ return;
+}
+
+
+/**
+ * Add the path to the origin peer and update the path used to reach it in case
+ * this is the shortest.
+ * The path is given in peer_info -> destination, therefore we turn the path
+ * upside down first.
+ *
+ * @param peer_info Peer to add the path to, being the origin of the path.
+ * @param path New path to add after being inversed.
+ * @param trusted Do we trust that this path is real?
+ */
+static void
+peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
+ struct MeshPeerPath *path, int trusted)
+{
+ path_invert (path);
+ peer_info_add_path (peer_info, path, trusted);
+}
+
+
+/**
+ * Build a PeerPath from the paths returned from the DHT, reversing the paths
+ * to obtain a local peer -> destination path and interning the peer ids.
+ *
+ * @return Newly allocated and created path
+ */
+static struct MeshPeerPath *
+path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
+ unsigned int get_path_length,
+ const struct GNUNET_PeerIdentity *put_path,
+ unsigned int put_path_length)
+{
+ struct MeshPeerPath *p;
+ GNUNET_PEER_Id id;
+ int i;
+
+ p = path_new (1);
+ p->peers[0] = myid;
+ GNUNET_PEER_change_rc (myid, 1);
+ i = get_path_length;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
+ for (i--; i >= 0; i--)
+ {
+ id = GNUNET_PEER_intern (&get_path[i]);
+ if (p->length > 0 && id == p->peers[p->length - 1])
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
+ GNUNET_PEER_change_rc (id, -1);
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
+ GNUNET_i2s (&get_path[i]));
+ p->length++;
+ p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
+ p->peers[p->length - 1] = id;
+ }
+ }
+ i = put_path_length;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
+ for (i--; i >= 0; i--)
+ {
+ id = GNUNET_PEER_intern (&put_path[i]);
+ if (id == myid)
+ {
+ /* PUT path went through us, so discard the path up until now and start
+ * from here to get a much shorter (and loop-free) path.
+ */
+ path_destroy (p);
+ p = path_new (0);
+ }
+ if (p->length > 0 && id == p->peers[p->length - 1])
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
+ GNUNET_PEER_change_rc (id, -1);
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
+ GNUNET_i2s (&put_path[i]));
+ p->length++;
+ p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
+ p->peers[p->length - 1] = id;
+ }
+ }
+#if MESH_DEBUG
+ if (get_path_length > 0)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
+ GNUNET_i2s (&get_path[0]));
+ if (put_path_length > 0)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
+ GNUNET_i2s (&put_path[0]));
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
+ p->length);
+ for (i = 0; i < p->length; i++)
+ {
+ struct GNUNET_PeerIdentity peer_id;
+
+ GNUNET_PEER_resolve (p->peers[i], &peer_id);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
+ GNUNET_i2s (&peer_id));
+ }
+#endif
+ return p;
+}
+
+
+/**
+ * Adds a path to the peer_infos of all the peers in the path
+ *
+ * @param p Path to process.
+ * @param confirmed Whether we know if the path works or not.
+ */
+static void
+path_add_to_peers (struct MeshPeerPath *p, int confirmed)
+{
+ unsigned int i;
+
+ /* TODO: invert and add */
+ for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
+ for (i++; i < p->length; i++)
+ {
+ struct MeshPeerInfo *aux;
+ struct MeshPeerPath *copy;
+
+ aux = peer_info_get_short (p->peers[i]);
+ copy = path_duplicate (p);
+ copy->length = i + 1;
+ peer_info_add_path (aux, copy, GNUNET_NO);
+ }
+}
+
+
+/**
+ * Send keepalive packets for a peer
+ *
+ * @param cls Closure (tunnel for which to send the keepalive).
+ * @param tc Notification context.
+ *
+ * TODO: implement explicit multicast keepalive?
+ */
+static void
+path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
+
+
+/**
+ * Search for a tunnel among the incoming tunnels
+ *
+ * @param tid the local id of the tunnel
+ *
+ * @return tunnel handler, NULL if doesn't exist
+ */
+static struct MeshTunnel *
+tunnel_get_incoming (MESH_TunnelNumber tid)
+{
+ struct GNUNET_HashCode hash;
+
+ GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
+ GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
+ return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
+}
+
+
+/**
+ * Search for a tunnel among the tunnels for a client
+ *
+ * @param c the client whose tunnels to search in
+ * @param tid the local id of the tunnel
+ *
+ * @return tunnel handler, NULL if doesn't exist
+ */
+static struct MeshTunnel *
+tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
+{
+ if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
+ {
+ return tunnel_get_incoming (tid);
+ }
+ else
+ {
+ struct GNUNET_HashCode hash;
+
+ GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
+ return GNUNET_CONTAINER_multihashmap_get (c->own_tunnels, &hash);
+ }
+}
+
+
+/**
+ * Search for a tunnel by global ID using PEER_ID
+ *
+ * @param pi owner of the tunnel
+ * @param tid global tunnel number
+ *
+ * @return tunnel handler, NULL if doesn't exist
+ */
+static struct MeshTunnel *
+tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
+{
+ struct MESH_TunnelID id;
+ struct GNUNET_HashCode hash;
+
+ id.oid = pi;
+ id.tid = tid;
+
+ GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
+ return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
+}
+
+
+/**
+ * Search for a tunnel by global ID using full PeerIdentities
+ *
+ * @param oid owner of the tunnel
+ * @param tid global tunnel number
+ *
+ * @return tunnel handler, NULL if doesn't exist
+ */
+static struct MeshTunnel *
+tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
+{
+ return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
+}
+
+
+/**
+ * Delete an active client from the tunnel.
+ *
+ * @param t Tunnel.
+ * @param c Client.
+ */
+static void
+tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c)
+{
+ unsigned int i;
+
+ for (i = 0; i < t->nclients; i++)
+ {
+ if (t->clients[i] == c)
{
- /* No callback, as peer will be already disconnected and a connection
- * scheduled by tunnel_notify_connection_broken.
- */
- tree_add_path (peer->tunnels[i]->tree, aux, NULL, NULL);
+ t->clients[i] = t->clients[t->nclients - 1];
+ t->clients_fc[i] = t->clients_fc[t->nclients - 1];
+ GNUNET_array_grow (t->clients, t->nclients, t->nclients - 1);
+ t->nclients++;
+ GNUNET_array_grow (t->clients_fc, t->nclients, t->nclients - 1);
+ break;
}
- else
+ }
+}
+
+
+/**
+ * Delete an ignored client from the tunnel.
+ *
+ * @param t Tunnel.
+ * @param c Client.
+ */
+static void
+tunnel_delete_ignored_client (struct MeshTunnel *t, const struct MeshClient *c)
+{
+ unsigned int i;
+
+ for (i = 0; i < t->nignore; i++)
+ {
+ if (t->ignore[i] == c)
{
- peer_info_connect (peer_d, peer->tunnels[i]);
+ t->ignore[i] = t->ignore[t->nignore - 1];
+ GNUNET_array_grow (t->ignore, t->nignore, t->nignore - 1);
+ break;
}
}
}
/**
- * Add the path to the peer and update the path used to reach it in case this
- * is the shortest.
+ * Delete a client from the tunnel. It should be only done on
+ * client disconnection, otherwise use client_ignore_tunnel.
+ *
+ * @param t Tunnel.
+ * @param c Client.
+ */
+static void
+tunnel_delete_client (struct MeshTunnel *t, const struct MeshClient *c)
+{
+ tunnel_delete_ignored_client (t, c);
+ tunnel_delete_active_client (t, c);
+}
+
+
+/**
+ * Iterator to free MeshTunnelChildInfo of tunnel children.
*
- * @param peer_info Destination peer to add the path to.
- * @param path New path to add. Last peer must be the peer in arg 1.
- * Path will be either used of freed if already known.
- * @param trusted Do we trust that this path is real?
+ * @param cls Closure (tunnel info).
+ * @param key Hash of GNUNET_PEER_Id (unused).
+ * @param value MeshTunnelChildInfo of the child.
+ *
+ * @return always GNUNET_YES, to keep iterating
+ */
+static int
+tunnel_destroy_child (void *cls,
+ const struct GNUNET_HashCode * key,
+ void *value)
+{
+ GNUNET_free (value);
+ return GNUNET_YES;
+}
+
+
+/**
+ * Callback used to notify a client owner of a tunnel that a peer has
+ * disconnected, most likely because of a path change.
+ *
+ * @param cls Closure (tunnel this notification is about).
+ * @param peer_id Short ID of disconnected peer.
*/
void
-peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
- int trusted)
+tunnel_notify_client_peer_disconnected (void *cls, GNUNET_PEER_Id peer_id)
{
- struct MeshPeerPath *aux;
- unsigned int l;
- unsigned int l2;
+ struct MeshTunnel *t = cls;
+ struct MeshPeerInfo *peer;
+ struct MeshPathInfo *path_info;
- if ((NULL == peer_info) || (NULL == path))
- {
- GNUNET_break (0);
- path_destroy (path);
- return;
- }
- if (path->peers[path->length - 1] != peer_info->id)
+ if (NULL != t->owner && NULL != nc)
{
- GNUNET_break (0);
- path_destroy (path);
- return;
+ struct GNUNET_MESH_PeerControl msg;
+
+ msg.header.size = htons (sizeof (msg));
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
+ msg.tunnel_id = htonl (t->local_tid);
+ GNUNET_PEER_resolve (peer_id, &msg.peer);
+ GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
+ &msg.header, GNUNET_NO);
}
- if (path->length <= 2 && GNUNET_NO == trusted)
+ peer = peer_info_get_short (peer_id);
+ path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
+ path_info->peer = peer;
+ path_info->t = t;
+ GNUNET_SCHEDULER_add_now (&peer_info_connect_task, path_info);
+}
+
+
+/**
+ * Add a peer to a tunnel, accomodating paths accordingly and initializing all
+ * needed rescources.
+ * If peer already exists, reevaluate shortest path and change if different.
+ *
+ * @param t Tunnel we want to add a new peer to
+ * @param peer PeerInfo of the peer being added
+ *
+ */
+static void
+tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
+{
+ struct GNUNET_PeerIdentity id;
+ struct MeshPeerPath *best_p;
+ struct MeshPeerPath *p;
+ unsigned int best_cost;
+ unsigned int cost;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_peer\n");
+ GNUNET_PEER_resolve (peer->id, &id);
+ if (GNUNET_NO ==
+ GNUNET_CONTAINER_multihashmap_contains (t->peers, &id.hashPubKey))
{
- /* Only allow CORE to tell us about direct paths */
- path_destroy (path);
- return;
+ t->peers_total++;
+ GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_CONTAINER_multihashmap_put (t->peers, &id.hashPubKey,
+ peer,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
}
- GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
- for (l = 1; l < path->length; l++)
+
+ if (NULL != (p = peer->path_head))
{
- if (path->peers[l] == myid)
+ best_p = p;
+ best_cost = tree_get_path_cost (t->tree, p);
+ while (NULL != p)
{
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
- for (l2 = 0; l2 < path->length - l; l2++)
+ if ((cost = tree_get_path_cost (t->tree, p)) < best_cost)
{
- path->peers[l2] = path->peers[l + l2];
+ best_cost = cost;
+ best_p = p;
}
- path->length -= l;
- l = 1;
- path->peers =
- GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
+ p = p->next;
}
+ tree_add_path (t->tree, best_p, &tunnel_notify_client_peer_disconnected, t);
+ if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
+ t->path_refresh_task =
+ GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
}
-#if MESH_DEBUG
+ else
{
- struct GNUNET_PeerIdentity id;
-
- GNUNET_PEER_resolve (peer_info->id, &id);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
- path->length, GNUNET_i2s (&id));
+ /* Start a DHT get */
+ peer_info_connect (peer, t);
}
-#endif
- l = path_get_length (path);
- if (0 == l)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_peer END\n");
+}
+
+/**
+ * Add a path to a tunnel which we don't own, just to remember the next hop.
+ * If destination node was already in the tunnel, the first hop information
+ * will be replaced with the new path.
+ *
+ * @param t Tunnel we want to add a new peer to
+ * @param p Path to add
+ * @param own_pos Position of local node in path.
+ *
+ */
+static void
+tunnel_add_path (struct MeshTunnel *t, struct MeshPeerPath *p,
+ unsigned int own_pos)
+{
+ struct GNUNET_PeerIdentity id;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_path\n");
+ GNUNET_assert (0 != own_pos);
+ tree_add_path (t->tree, p, NULL, NULL);
+ if (own_pos < p->length - 1)
{
- GNUNET_free (path);
- return;
+ GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
+ tree_update_first_hops (t->tree, myid, &id);
}
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_path END\n");
+}
- GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
- for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
+/**
+ * Add a client to a tunnel, initializing all needed data structures.
+ *
+ * @param t Tunnel to which add the client.
+ * @param c Client which to add to the tunnel.
+ */
+static void
+tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c)
+{
+ struct MeshTunnelClientInfo clinfo;
+
+ GNUNET_array_append (t->clients, t->nclients, c);
+ clinfo.fwd_ack = t->fwd_pid + 1;
+ clinfo.bck_ack = t->nobuffer ? 1 : INITIAL_WINDOW_SIZE - 1;
+ clinfo.fwd_pid = t->fwd_pid;
+ clinfo.bck_pid = (uint32_t) -1; // Expected next: 0
+ t->nclients--;
+ GNUNET_array_append (t->clients_fc, t->nclients, clinfo);
+}
+
+
+/**
+ * Notifies a tunnel that a connection has broken that affects at least
+ * some of its peers. Sends a notification towards the root of the tree.
+ * In case the peer is the owner of the tree, notifies the client that owns
+ * the tunnel and tries to reconnect.
+ *
+ * @param t Tunnel affected.
+ * @param p1 Peer that got disconnected from p2.
+ * @param p2 Peer that got disconnected from p1.
+ *
+ * @return Short ID of the peer disconnected (either p1 or p2).
+ * 0 if the tunnel remained unaffected.
+ */
+static GNUNET_PEER_Id
+tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
+ GNUNET_PEER_Id p2)
+{
+ GNUNET_PEER_Id pid;
+
+ pid =
+ tree_notify_connection_broken (t->tree, p1, p2,
+ &tunnel_notify_client_peer_disconnected,
+ t);
+ if (myid != p1 && myid != p2)
{
- l2 = path_get_length (aux);
- if (l2 > l)
- {
- GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
- peer_info->path_tail, aux, path);
- return;
- }
- else
+ return pid;
+ }
+ if (pid != myid)
+ {
+ if (tree_get_predecessor (t->tree) != 0)
{
- if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
- {
- path_destroy (path);
- return;
- }
+ /* We are the peer still connected, notify owner of the disconnection. */
+ struct GNUNET_MESH_PathBroken msg;
+ struct GNUNET_PeerIdentity neighbor;
+
+ msg.header.size = htons (sizeof (msg));
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
+ GNUNET_PEER_resolve (t->id.oid, &msg.oid);
+ msg.tid = htonl (t->id.tid);
+ msg.peer1 = my_full_id;
+ GNUNET_PEER_resolve (pid, &msg.peer2);
+ GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
+ send_message (&msg.header, &neighbor, t);
}
}
- GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
- path);
- return;
+ return pid;
}
/**
- * Add the path to the origin peer and update the path used to reach it in case
- * this is the shortest.
- * The path is given in peer_info -> destination, therefore we turn the path
- * upside down first.
+ * Send a multicast packet to a neighbor.
*
- * @param peer_info Peer to add the path to, being the origin of the path.
- * @param path New path to add after being inversed.
- * @param trusted Do we trust that this path is real?
+ * @param cls Closure (Info about the multicast packet)
+ * @param neighbor_id Short ID of the neighbor to send the packet to.
*/
static void
-peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
- struct MeshPeerPath *path, int trusted)
+tunnel_send_multicast_iterator (void *cls, GNUNET_PEER_Id neighbor_id)
{
- path_invert (path);
- peer_info_add_path (peer_info, path, trusted);
+ struct MeshData *mdata = cls;
+ struct MeshTransmissionDescriptor *info;
+ struct GNUNET_PeerIdentity neighbor;
+
+ info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
+
+ info->mesh_data = mdata;
+ (*(mdata->reference_counter)) ++;
+ info->destination = neighbor_id;
+ GNUNET_PEER_resolve (neighbor_id, &neighbor);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending to %s...\n",
+ GNUNET_i2s (&neighbor));
+ info->peer = peer_info_get (&neighbor);
+ GNUNET_assert (NULL != info->peer);
+ queue_add(info,
+ GNUNET_MESSAGE_TYPE_MESH_MULTICAST,
+ info->mesh_data->data_len,
+ info->peer,
+ mdata->t);
}
/**
- * Build a PeerPath from the paths returned from the DHT, reversing the paths
- * to obtain a local peer -> destination path and interning the peer ids.
+ * Queue a message in a tunnel in multicast, sending a copy to each child node
+ * down the local one in the tunnel tree.
*
- * @return Newly allocated and created path
+ * @param t Tunnel in which to send the data.
+ * @param msg Message to be sent.
+ * @param internal Has the service generated this message?
*/
-static struct MeshPeerPath *
-path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
- unsigned int get_path_length,
- const struct GNUNET_PeerIdentity *put_path,
- unsigned int put_path_length)
+static void
+tunnel_send_multicast (struct MeshTunnel *t,
+ const struct GNUNET_MessageHeader *msg,
+ int internal)
{
- struct MeshPeerPath *p;
- GNUNET_PEER_Id id;
- int i;
+ struct MeshData *mdata;
- p = path_new (1);
- p->peers[0] = myid;
- GNUNET_PEER_change_rc (myid, 1);
- i = get_path_length;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
- for (i--; i >= 0; i--)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " sending a multicast packet...\n");
+
+ mdata = GNUNET_malloc (sizeof (struct MeshData));
+ mdata->data_len = ntohs (msg->size);
+ mdata->reference_counter = GNUNET_malloc (sizeof (unsigned int));
+ mdata->t = t;
+ mdata->data = GNUNET_malloc (mdata->data_len);
+ memcpy (mdata->data, msg, mdata->data_len);
+ if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
{
- id = GNUNET_PEER_intern (&get_path[i]);
- if (p->length > 0 && id == p->peers[p->length - 1])
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
- GNUNET_PEER_change_rc (id, -1);
- }
- else
+ struct GNUNET_MESH_Multicast *mcast;
+
+ if (t->fwd_queue_n >= t->fwd_queue_max)
{
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
- GNUNET_i2s (&get_path[i]));
- p->length++;
- p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
- p->peers[p->length - 1] = id;
+ GNUNET_break (0);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " queue full!\n");
+ GNUNET_free (mdata->data);
+ GNUNET_free (mdata->reference_counter);
+ GNUNET_free (mdata);
+ return;
}
+ t->fwd_queue_n++;
+ mcast = (struct GNUNET_MESH_Multicast *) mdata->data;
+ mcast->ttl = htonl (ntohl (mcast->ttl) - 1);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " data packet, ttl: %u\n",
+ ntohl (mcast->ttl));
}
- i = put_path_length;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
- for (i--; i >= 0; i--)
+ else
{
- id = GNUNET_PEER_intern (&put_path[i]);
- if (id == myid)
- {
- /* PUT path went through us, so discard the path up until now and start
- * from here to get a much shorter (and loop-free) path.
- */
- path_destroy (p);
- p = path_new (0);
- }
- if (p->length > 0 && id == p->peers[p->length - 1])
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
- GNUNET_PEER_change_rc (id, -1);
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
- GNUNET_i2s (&put_path[i]));
- p->length++;
- p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
- p->peers[p->length - 1] = id;
- }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not a data packet, no ttl\n");
}
-#if MESH_DEBUG
- if (get_path_length > 0)
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
- GNUNET_i2s (&get_path[0]));
- if (put_path_length > 0)
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
- GNUNET_i2s (&put_path[0]));
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
- p->length);
- for (i = 0; i < p->length; i++)
+ if (NULL != t->owner &&
+ GNUNET_YES != t->owner->shutting_down &&
+ GNUNET_NO == internal)
{
- struct GNUNET_PeerIdentity peer_id;
+ mdata->task = GNUNET_malloc (sizeof (GNUNET_SCHEDULER_TaskIdentifier));
+ (*(mdata->task)) =
+ GNUNET_SCHEDULER_add_delayed (unacknowledged_wait_time, &client_allow_send,
+ mdata);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "timeout task %u\n",
+ *(mdata->task));
+ }
- GNUNET_PEER_resolve (p->peers[i], &peer_id);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
- GNUNET_i2s (&peer_id));
+ tree_iterate_children (t->tree, &tunnel_send_multicast_iterator, mdata);
+ if (*(mdata->reference_counter) == 0)
+ {
+ GNUNET_break (0);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " no one to send data to\n");
+ GNUNET_free (mdata->data);
+ GNUNET_free (mdata->reference_counter);
+ if (NULL != mdata->task)
+ {
+ GNUNET_SCHEDULER_cancel(*(mdata->task));
+ GNUNET_free (mdata->task);
+ GNUNET_SERVER_receive_done (t->owner->handle, GNUNET_OK);
+ }
+ GNUNET_free (mdata);
+ t->fwd_queue_n--;
}
-#endif
- return p;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " sending a multicast packet done\n");
+ return;
}
/**
- * Adds a path to the peer_infos of all the peers in the path
+ * Increase the SKIP value of all peers that
+ * have not received a unicast message.
*
- * @param p Path to process.
- * @param confirmed Whether we know if the path works or not. FIXME use
+ * @param cls Closure (ID of the peer that HAS received the message).
+ * @param key ID of the neighbor.
+ * @param value Information about the neighbor.
+ *
+ * @return GNUNET_YES to keep iterating.
*/
-static void
-path_add_to_peers (struct MeshPeerPath *p, int confirmed)
+static int
+tunnel_add_skip (void *cls,
+ const struct GNUNET_HashCode * key,
+ void *value)
{
- unsigned int i;
+ struct GNUNET_PeerIdentity *neighbor = cls;
+ struct MeshTunnelChildInfo *cinfo = value;
- /* TODO: invert and add */
- for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
- for (i++; i < p->length; i++)
+ /* TODO compare only pointers? key == neighbor? */
+ if (0 == memcmp (&neighbor->hashPubKey, key, sizeof (struct GNUNET_HashCode)))
{
- struct MeshPeerInfo *aux;
- struct MeshPeerPath *copy;
-
- aux = peer_info_get_short (p->peers[i]);
- copy = path_duplicate (p);
- copy->length = i + 1;
- peer_info_add_path (aux, copy, GNUNET_NO);
+ return GNUNET_YES;
}
+ cinfo->skip++;
+ return GNUNET_YES;
}
/**
- * Send keepalive packets for a peer
- *
- * @param cls Closure (tunnel for which to send the keepalive).
- * @param tc Notification context.
+ * @brief Get neighbor's Flow Control information.
*
- * TODO: implement explicit multicast keepalive?
- */
-static void
-path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
-
-
-/**
- * Search for a tunnel among the incoming tunnels
+ * Retrieves the MeshTunnelChildInfo containing Flow Control data about a direct
+ * descendant of the local node in a certain tunnel.
+ * If the info is not yet there (recently created path), creates the data struct
+ * and inserts it into the tunnel info, initialized to the current tunnel ACK
+ * values.
*
- * @param tid the local id of the tunnel
+ * @param t Tunnel related.
+ * @param peer Neighbor whose Flow Control info is needed.
*
- * @return tunnel handler, NULL if doesn't exist
+ * @return Neighbor's Flow Control info.
*/
-static struct MeshTunnel *
-tunnel_get_incoming (MESH_TunnelNumber tid)
+static struct MeshTunnelChildInfo *
+tunnel_get_neighbor_fc (const struct MeshTunnel *t,
+ const struct GNUNET_PeerIdentity *peer)
{
- GNUNET_HashCode hash;
+ struct MeshTunnelChildInfo *cinfo;
+ cinfo = GNUNET_CONTAINER_multihashmap_get (t->children_fc,
+ &peer->hashPubKey);
+ if (NULL == cinfo)
+ {
+ uint32_t delta;
- GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
- GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
- return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
+ cinfo = GNUNET_malloc (sizeof (struct MeshTunnelChildInfo));
+ cinfo->id = GNUNET_PEER_intern (peer);
+ cinfo->skip = t->fwd_pid;
+
+ delta = t->nobuffer ? 1 : INITIAL_WINDOW_SIZE - 1;
+ cinfo->fwd_ack = t->fwd_pid + delta;
+ cinfo->bck_ack = delta;
+
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_CONTAINER_multihashmap_put (t->children_fc,
+ &peer->hashPubKey,
+ cinfo,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
+ }
+ return cinfo;
}
/**
- * Search for a tunnel among the tunnels for a client
- *
- * @param c the client whose tunnels to search in
- * @param tid the local id of the tunnel
- *
- * @return tunnel handler, NULL if doesn't exist
+ * Get the Flow Control info of a client.
+ *
+ * @param t Tunnel on which to look.
+ * @param c Client whose ACK to get.
+ *
+ * @return ACK value.
*/
-static struct MeshTunnel *
-tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
+static struct MeshTunnelClientInfo *
+tunnel_get_client_fc (struct MeshTunnel *t,
+ struct MeshClient *c)
{
- if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
- {
- return tunnel_get_incoming (tid);
- }
- else
- {
- GNUNET_HashCode hash;
+ unsigned int i;
- GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
- return GNUNET_CONTAINER_multihashmap_get (c->own_tunnels, &hash);
+ for (i = 0; i < t->nclients; i++)
+ {
+ if (t->clients[i] != c)
+ continue;
+ return &t->clients_fc[i];
}
+ GNUNET_assert (0);
+ return NULL; // avoid compiler / coverity complaints
}
/**
- * Search for a tunnel by global ID using PEER_ID
- *
- * @param pi owner of the tunnel
- * @param tid global tunnel number
+ * Iterator to get the appropiate ACK value from all children nodes.
*
- * @return tunnel handler, NULL if doesn't exist
+ * @param cls Closue (tunnel).
+ * @param id Id of the child node.
*/
-static struct MeshTunnel *
-tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
+static void
+tunnel_get_child_fwd_ack (void *cls,
+ GNUNET_PEER_Id id)
{
- struct MESH_TunnelID id;
- GNUNET_HashCode hash;
+ struct GNUNET_PeerIdentity peer_id;
+ struct MeshTunnelChildInfo *cinfo;
+ struct MeshTunnelChildIteratorContext *ctx = cls;
+ struct MeshTunnel *t = ctx->t;
+ uint32_t ack;
- id.oid = pi;
- id.tid = tid;
+ GNUNET_PEER_resolve (id, &peer_id);
+ cinfo = tunnel_get_neighbor_fc (t, &peer_id);
+ ack = cinfo->fwd_ack;
+
+ ctx->nchildren++;
+ if (GNUNET_NO == ctx->init)
+ {
+ ctx->max_child_ack = ack;
+ ctx->init = GNUNET_YES;
+ }
+
+ if (GNUNET_YES == t->speed_min)
+ {
+ ctx->max_child_ack = ctx->max_child_ack > ack ? ack : ctx->max_child_ack;
+ }
+ else
+ {
+ ctx->max_child_ack = ctx->max_child_ack > ack ? ctx->max_child_ack : ack;
+ }
- GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
- return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
}
/**
- * Search for a tunnel by global ID using full PeerIdentities
+ * Get the maximum PID allowed to transmit to any
+ * tunnel child of the local peer, depending on the tunnel
+ * buffering/speed settings.
*
- * @param oid owner of the tunnel
- * @param tid global tunnel number
+ * @param t Tunnel.
*
- * @return tunnel handler, NULL if doesn't exist
+ * @return Maximum PID allowed (uint32 MAX), -1 if node has no children.
*/
-static struct MeshTunnel *
-tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
+static int64_t
+tunnel_get_children_fwd_ack (struct MeshTunnel *t)
{
- return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
+ struct MeshTunnelChildIteratorContext ctx;
+ ctx.t = t;
+ ctx.max_child_ack = 0;
+ ctx.nchildren = 0;
+ tree_iterate_children (t->tree, tunnel_get_child_fwd_ack, &ctx);
+
+ if (0 == ctx.nchildren)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " tunnel has no children, no FWD ACK\n");
+ return -1LL;
+ }
+
+ if (GNUNET_YES == t->nobuffer && GMC_is_pid_bigger(ctx.max_child_ack, t->fwd_pid))
+ ctx.max_child_ack = t->fwd_pid + 1; // Might overflow, it's ok.
+
+ return (int64_t) ctx.max_child_ack;
}
/**
- * Delete an active client from the tunnel.
+ * Set the FWD ACK value of a client in a particular tunnel.
*
- * @param t Tunnel.
- * @param c Client.
+ * @param t Tunnel affected.
+ * @param c Client whose ACK to set.
+ * @param ack ACK value.
*/
static void
-tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c)
+tunnel_set_client_fwd_ack (struct MeshTunnel *t,
+ struct MeshClient *c,
+ uint32_t ack)
{
unsigned int i;
for (i = 0; i < t->nclients; i++)
{
- if (t->clients[i] == c)
- {
- t->clients[i] = t->clients[t->nclients - 1];
- GNUNET_array_grow (t->clients, t->nclients, t->nclients - 1);
- break;
- }
+ if (t->clients[i] != c)
+ continue;
+ t->clients_fc[i].fwd_ack = ack;
+ return;
}
+ GNUNET_break (0);
}
/**
- * Delete an ignored client from the tunnel.
+ * Get the highest ACK value of all clients in a particular tunnel,
+ * according to the buffering/speed settings.
*
- * @param t Tunnel.
- * @param c Client.
+ * @param t Tunnel on which to look.
+ *
+ * @return Corresponding ACK value (max uint32_t).
+ * If no clients are suscribed, -1.
*/
-static void
-tunnel_delete_ignored_client (struct MeshTunnel *t, const struct MeshClient *c)
+static int64_t
+tunnel_get_clients_fwd_ack (struct MeshTunnel *t)
{
unsigned int i;
+ int64_t ack;
- for (i = 0; i < t->nignore; i++)
+ if (0 == t->nclients)
{
- if (t->ignore[i] == c)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " tunnel has no clients, no FWD ACK\n");
+ return -1LL;
+ }
+
+ for (ack = -1, i = 0; i < t->nclients; i++)
+ {
+ if (-1 == ack ||
+ (GNUNET_YES == t->speed_min &&
+ GNUNET_YES == GMC_is_pid_bigger (ack, t->clients_fc[i].fwd_ack)) ||
+ (GNUNET_NO == t->speed_min &&
+ GNUNET_YES == GMC_is_pid_bigger (t->clients_fc[i].fwd_ack, ack)))
{
- t->ignore[i] = t->ignore[t->nignore - 1];
- GNUNET_array_grow (t->ignore, t->nignore, t->nignore - 1);
- break;
+ ack = t->clients_fc[i].fwd_ack;
}
}
-}
+ if (GNUNET_YES == t->nobuffer && GMC_is_pid_bigger(ack, t->fwd_pid))
+ ack = (uint32_t) t->fwd_pid + 1; // Might overflow, it's ok.
-/**
- * Delete a client from the tunnel. It should be only done on
- * client disconnection, otherwise use client_ignore_tunnel.
- *
- * @param t Tunnel.
- * @param c Client.
- */
-static void
-tunnel_delete_client (struct MeshTunnel *t, const struct MeshClient *c)
-{
- tunnel_delete_ignored_client (t, c);
- tunnel_delete_active_client (t, c);
+ return (uint32_t) ack;
}
/**
- * Callback used to notify a client owner of a tunnel that a peer has
- * disconnected, most likely because of a path change.
+ * Get the current fwd ack value for a tunnel, taking in account the tunnel
+ * mode and the status of all children nodes.
*
- * @param cls Closure (tunnel this notification is about).
- * @param peer_id Short ID of disconnected peer.
+ * @param t Tunnel.
+ *
+ * @return Maximum PID allowed.
*/
-void
-notify_peer_disconnected (void *cls, GNUNET_PEER_Id peer_id)
+static uint32_t
+tunnel_get_fwd_ack (struct MeshTunnel *t)
{
- struct MeshTunnel *t = cls;
- struct MeshPeerInfo *peer;
- struct MeshPathInfo *path_info;
+ uint32_t count;
+ uint32_t buffer_free;
+ int64_t child_ack;
+ int64_t client_ack;
+ uint32_t ack;
- if (NULL != t->owner && NULL != nc)
+ count = t->fwd_pid - t->skip;
+ buffer_free = t->fwd_queue_max - t->fwd_queue_n;
+ ack = count + buffer_free; // Might overflow 32 bits, it's ok!
+ child_ack = tunnel_get_children_fwd_ack (t);
+ client_ack = tunnel_get_clients_fwd_ack (t);
+ if (-1 == child_ack)
{
- struct GNUNET_MESH_PeerControl msg;
+ // Node has no children, child_ack AND core buffer are irrelevant.
+ GNUNET_break (-1 != client_ack); // No children AND no clients? Not good! // FIXME fc
+ return (uint32_t) client_ack;
+ }
- msg.header.size = htons (sizeof (msg));
- msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
- msg.tunnel_id = htonl (t->local_tid);
- GNUNET_PEER_resolve (peer_id, &msg.peer);
- GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
- &msg.header, GNUNET_NO);
+ if (GNUNET_YES == t->speed_min)
+ {
+ ack = GMC_min_pid ((uint32_t) child_ack, ack);
+ ack = GMC_min_pid ((uint32_t) client_ack, ack);
}
- peer = peer_info_get_short (peer_id);
- path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
- path_info->peer = peer;
- path_info->t = t;
- GNUNET_SCHEDULER_add_now (&peer_info_connect_task, path_info);
+ else
+ {
+ ack = GMC_max_pid ((uint32_t) child_ack, ack);
+ ack = GMC_max_pid ((uint32_t) client_ack, ack);
+ }
+ if (GNUNET_YES == t->nobuffer && GMC_is_pid_bigger(ack, t->fwd_pid))
+ ack = t->fwd_pid + 1; // Might overflow 32 bits, it's ok!
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "c %u, bf %u, ch %u, cl %u, ACK: %u\n",
+ count, buffer_free, child_ack, client_ack, ack);
+ return ack;
}
/**
- * Add a peer to a tunnel, accomodating paths accordingly and initializing all
- * needed rescources.
- * If peer already exists, reevaluate shortest path and change if different.
- *
- * @param t Tunnel we want to add a new peer to
- * @param peer PeerInfo of the peer being added
- *
+ * Build a local ACK message and send it to a local client.
+ *
+ * @param t Tunnel on which to send the ACK.
+ * @param c Client to whom send the ACK.
+ * @param ack Value of the ACK.
*/
static void
-tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
+send_local_ack (struct MeshTunnel *t, struct MeshClient *c, uint32_t ack)
{
- struct GNUNET_PeerIdentity id;
- struct MeshPeerPath *best_p;
- struct MeshPeerPath *p;
- unsigned int best_cost;
- unsigned int cost;
+ struct GNUNET_MESH_LocalAck msg;
- GNUNET_PEER_resolve (peer->id, &id);
- if (GNUNET_NO ==
- GNUNET_CONTAINER_multihashmap_contains (t->peers, &id.hashPubKey))
- {
- t->peers_total++;
- GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
- GNUNET_assert (GNUNET_OK ==
- GNUNET_CONTAINER_multihashmap_put (t->peers, &id.hashPubKey,
- peer,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
- }
+ msg.header.size = htons (sizeof (msg));
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
+ msg.tunnel_id = htonl (t->owner == c ? t->local_tid : t->local_tid_dest);
+ msg.max_pid = htonl (ack);
+ GNUNET_SERVER_notification_context_unicast(nc,
+ c->handle,
+ &msg.header,
+ GNUNET_NO);
+}
- if (NULL != (p = peer->path_head))
- {
- best_p = p;
- best_cost = tree_get_path_cost (t->tree, p);
- while (NULL != p)
- {
- if ((cost = tree_get_path_cost (t->tree, p)) < best_cost)
- {
- best_cost = cost;
- best_p = p;
- }
- p = p->next;
- }
- tree_add_path (t->tree, best_p, ¬ify_peer_disconnected, t);
- if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
- t->path_refresh_task =
- GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh, t);
- }
- else
- {
- /* Start a DHT get */
- peer_info_connect (peer, t);
- }
+/**
+ * Build an ACK message and queue it to send to the given peer.
+ *
+ * @param t Tunnel on which to send the ACK.
+ * @param peer Peer to whom send the ACK.
+ * @param ack Value of the ACK.
+ */
+static void
+send_ack (struct MeshTunnel *t, struct GNUNET_PeerIdentity *peer, uint32_t ack)
+{
+ struct GNUNET_MESH_ACK msg;
+
+ GNUNET_PEER_resolve (t->id.oid, &msg.oid);
+ msg.header.size = htons (sizeof (msg));
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
+ msg.pid = htonl (ack);
+ msg.tid = htonl (t->id.tid);
+
+ send_message (&msg.header, peer, t);
}
+
/**
- * Add a path to a tunnel which we don't own, just to remember the next hop.
- * If destination node was already in the tunnel, the first hop information
- * will be replaced with the new path.
- *
- * @param t Tunnel we want to add a new peer to
- * @param p Path to add
- * @param own_pos Position of local node in path.
+ * Notify a the owner of a tunnel about how many more
+ * payload packages will we accept on a given tunnel.
*
+ * @param t Tunnel on which to send the ACK.
*/
static void
-tunnel_add_path (struct MeshTunnel *t, struct MeshPeerPath *p,
- unsigned int own_pos)
+tunnel_send_client_fwd_ack (struct MeshTunnel *t)
{
- struct GNUNET_PeerIdentity id;
+ uint32_t ack;
- GNUNET_assert (0 != own_pos);
- tree_add_path (t->tree, p, NULL, NULL);
- if (own_pos < p->length - 1)
- {
- GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
- tree_update_first_hops (t->tree, myid, &id);
- }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending client FWD ACK on tunnel %X\n",
+ t->local_tid);
+
+ ack = tunnel_get_fwd_ack (t);
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
+ if (t->last_fwd_ack == ack)
+ return;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending!\n");
+ t->last_fwd_ack = ack;
+ send_local_ack (t, t->owner, ack);
}
/**
- * Notifies a tunnel that a connection has broken that affects at least
- * some of its peers. Sends a notification towards the root of the tree.
- * In case the peer is the owner of the tree, notifies the client that owns
- * the tunnel and tries to reconnect.
- *
- * @param t Tunnel affected.
- * @param p1 Peer that got disconnected from p2.
- * @param p2 Peer that got disconnected from p1.
- *
- * @return Short ID of the peer disconnected (either p1 or p2).
- * 0 if the tunnel remained unaffected.
+ * Send an ACK informing the predecessor about the available buffer space.
+ * In case there is no predecessor, inform the owning client.
+ * If buffering is off, send only on behalf of children or self if endpoint.
+ * If buffering is on, send when sent to children and buffer space is free.
+ * Note that although the name is fwd_ack, the FWD mean forward *traffic*,
+ * the ACK itself goes "back" (towards root).
+ *
+ * @param t Tunnel on which to send the ACK.
+ * @param type Type of message that triggered the ACK transmission.
*/
-static GNUNET_PEER_Id
-tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
- GNUNET_PEER_Id p2)
+static void
+tunnel_send_fwd_ack (struct MeshTunnel *t, uint16_t type)
{
- GNUNET_PEER_Id pid;
+ struct GNUNET_PeerIdentity id;
+ uint32_t ack;
- pid =
- tree_notify_connection_broken (t->tree, p1, p2, ¬ify_peer_disconnected,
- t);
- if (myid != p1 && myid != p2)
+ if (NULL != t->owner)
{
- return pid;
+ tunnel_send_client_fwd_ack (t);
+ return;
}
- if (pid != myid)
+ /* Is it after unicast / multicast retransmission? */
+ switch (type)
{
- if (tree_get_predecessor (t->tree) != 0)
- {
- /* We are the peer still connected, notify owner of the disconnection. */
- struct GNUNET_MESH_PathBroken msg;
- struct GNUNET_PeerIdentity neighbor;
+ case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
+ case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "ACK due to FWD DATA retransmission\n");
+ if (GNUNET_YES == t->nobuffer)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
+ return;
+ }
+ if (t->fwd_queue_max > t->fwd_queue_n * 2 &&
+ GMC_is_pid_bigger(t->last_fwd_ack, t->fwd_pid))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " t->qmax: %u, t->qn: %u\n",
+ t->fwd_queue_max, t->fwd_queue_n);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " t->pid: %u, t->ack: %u\n",
+ t->fwd_pid, t->last_fwd_ack);
+ return;
+ }
+ break;
+ case GNUNET_MESSAGE_TYPE_MESH_ACK:
+ case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
+ break;
+ default:
+ GNUNET_break (0);
+ }
- msg.header.size = htons (sizeof (msg));
- msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
- GNUNET_PEER_resolve (t->id.oid, &msg.oid);
- msg.tid = htonl (t->id.tid);
- msg.peer1 = my_full_id;
- GNUNET_PEER_resolve (pid, &msg.peer2);
- GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
- send_message (&msg.header, &neighbor);
- }
+ /* Ok, ACK might be necessary, what PID to ACK? */
+ ack = tunnel_get_fwd_ack (t);
+
+ /* If speed_min and not all children have ack'd, dont send yet */
+ if (ack == t->last_fwd_ack)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not ready\n");
+ return;
}
- return pid;
+
+ t->last_fwd_ack = ack;
+ GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
+ send_ack (t, &id, ack);
}
/**
- * Send a multicast packet to a neighbor.
+ * Iterator to send a child node a BCK ACK to allow him to send more
+ * to_origin data.
*
- * @param cls Closure (Info about the multicast packet)
- * @param neighbor_id Short ID of the neighbor to send the packet to.
+ * @param cls Closure (tunnel).
+ * @param id Id of the child node.
*/
static void
-tunnel_send_multicast_iterator (void *cls, GNUNET_PEER_Id neighbor_id)
+tunnel_send_child_bck_ack (void *cls,
+ GNUNET_PEER_Id id)
{
- struct MeshData *mdata = cls;
- struct MeshTransmissionDescriptor *info;
- struct GNUNET_PeerIdentity neighbor;
- unsigned int i;
+ struct MeshTunnel *t = cls;
+ struct MeshTunnelChildInfo *cinfo;
+ struct GNUNET_PeerIdentity peer;
- info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
+ GNUNET_PEER_resolve (id, &peer);
+ cinfo = tunnel_get_neighbor_fc (t, &peer);
- info->mesh_data = mdata;
- (*(mdata->reference_counter)) ++;
- info->destination = neighbor_id;
- GNUNET_PEER_resolve (neighbor_id, &neighbor);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending to %s...\n",
- GNUNET_i2s (&neighbor));
- info->peer = peer_info_get (&neighbor);
- GNUNET_assert (NULL != info->peer);
- i = peer_info_transmit_slot (info->peer);
- info->handler_n = i;
- info->peer->infos[i] = info;
- info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
- info->peer->core_transmit[i] =
- GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
- GNUNET_TIME_UNIT_FOREVER_REL,
- &neighbor, info->mesh_data->data_len,
- &send_core_data_multicast, info);
+ if (cinfo->bck_ack != cinfo->pid &&
+ GNUNET_NO == GMC_is_pid_bigger (cinfo->bck_ack, cinfo->pid))
+ return;
+
+ cinfo->bck_ack++;
+ send_ack (t, &peer, cinfo->bck_ack);
}
+
/**
- * Send a message in a tunnel in multicast, sending a copy to each child node
- * down the local one in the tunnel tree.
- *
- * @param t Tunnel in which to send the data.
- * @param msg Message to be sent.
- * @param internal Has the service generated this message?
+ * @brief Send BCK ACKs to clients to allow them more to_origin traffic
+ *
+ * Iterates over all clients and sends BCK ACKs to the ones that need it.
+ *
+ * @param t Tunnel on which to send the BCK ACKs.
*/
-static void
-tunnel_send_multicast (struct MeshTunnel *t,
- const struct GNUNET_MessageHeader *msg,
- int internal)
-{
- struct MeshData *mdata;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " sending a multicast packet...\n");
- mdata = GNUNET_malloc (sizeof (struct MeshData));
- mdata->data_len = ntohs (msg->size);
- mdata->reference_counter = GNUNET_malloc (sizeof (unsigned int));
- mdata->t = t;
- mdata->data = GNUNET_malloc (mdata->data_len);
- memcpy (mdata->data, msg, mdata->data_len);
- if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
- {
- struct GNUNET_MESH_Multicast *mcast;
+static void
+tunnel_send_clients_bck_ack (struct MeshTunnel *t)
+{
+ unsigned int i;
+ unsigned int tunnel_delta;
- mcast = (struct GNUNET_MESH_Multicast *) mdata->data;
- mcast->ttl = htonl (ntohl (mcast->ttl) - 1);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " data packet, ttl: %u\n",
- ntohl (mcast->ttl));
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not a data packet, no ttl\n");
- }
- if (NULL != t->owner && GNUNET_YES != t->owner->shutting_down
- && GNUNET_NO == internal)
- {
- mdata->task = GNUNET_malloc (sizeof (GNUNET_SCHEDULER_TaskIdentifier));
- (*(mdata->task)) =
- GNUNET_SCHEDULER_add_delayed (UNACKNOWLEDGED_WAIT, &client_allow_send,
- mdata);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "timeout task %u\n",
- *(mdata->task));
- }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Sending BCK ACK to clients\n");
- tree_iterate_children (t->tree, &tunnel_send_multicast_iterator, mdata);
- if (*(mdata->reference_counter) == 0)
+ tunnel_delta = t->bck_ack - t->bck_pid;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " tunnel delta: %u\n", tunnel_delta);
+
+ /* Find client whom to allow to send to origin (with lowest buffer space) */
+ for (i = 0; i < t->nclients; i++)
{
- GNUNET_free (mdata->data);
- GNUNET_free (mdata->reference_counter);
- if (NULL != mdata->task)
+ struct MeshTunnelClientInfo *clinfo;
+ unsigned int delta;
+
+ clinfo = &t->clients_fc[i];
+ delta = clinfo->bck_ack - clinfo->bck_pid;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client %u delta: %u\n",
+ t->clients[i]->id, delta);
+
+ if ((GNUNET_NO == t->nobuffer && tunnel_delta > delta) ||
+ (GNUNET_YES == t->nobuffer && 0 == delta))
{
- GNUNET_SCHEDULER_cancel(*(mdata->task));
- GNUNET_free (mdata->task);
- GNUNET_SERVER_receive_done(t->owner->handle, GNUNET_OK);
+ uint32_t ack;
+
+ ack = clinfo->bck_pid;
+ ack += t->nobuffer ? 1 : tunnel_delta;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " sending ack to client %u: %u\n",
+ t->clients[i]->id, ack);
+ send_local_ack (t, t->clients[i], ack);
+ clinfo->bck_ack = ack;
}
- // FIXME change order?
- GNUNET_free (mdata);
}
+}
+
+
+/**
+ * Send an ACK informing the children nodes and destination clients about
+ * the available buffer space.
+ * If buffering is off, send only on behalf of root (can be self).
+ * If buffering is on, send when sent to predecessor and buffer space is free.
+ * Note that although the name is bck_ack, the BCK mean backwards *traffic*,
+ * the ACK itself goes "forward" (towards children/clients).
+ *
+ * @param t Tunnel on which to send the ACK.
+ * @param type Type of message that triggered the ACK transmission.
+ */
+static void
+tunnel_send_bck_ack (struct MeshTunnel *t, uint16_t type)
+{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " sending a multicast packet done\n");
- return;
+ "Sending BCK ACK on tunnel %u [%u] due to %s\n",
+ t->id.oid, t->id.tid, GNUNET_MESH_DEBUG_M2S(type));
+ /* Is it after data to_origin retransmission? */
+ switch (type)
+ {
+ case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
+ if (GNUNET_YES == t->nobuffer)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " Not sending ACK, nobuffer\n");
+ return;
+ }
+ break;
+ case GNUNET_MESSAGE_TYPE_MESH_ACK:
+ case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
+ break;
+ default:
+ GNUNET_break (0);
+ }
+
+ tunnel_send_clients_bck_ack (t);
+ tree_iterate_children (t->tree, &tunnel_send_child_bck_ack, t);
}
}
+/**
+ * Cancel all transmissions towards a neighbor that belong to a certain tunnel.
+ *
+ * @param cls Closure (Tunnel which to cancel).
+ * @param neighbor_id Short ID of the neighbor to whom cancel the transmissions.
+ */
+static void
+tunnel_cancel_queues (void *cls, GNUNET_PEER_Id neighbor_id)
+{
+ struct MeshTunnel *t = cls;
+ struct MeshPeerInfo *peer_info;
+ struct MeshPeerQueue *pq;
+ struct MeshPeerQueue *next;
+
+ peer_info = peer_info_get_short (neighbor_id);
+ for (pq = peer_info->queue_head; NULL != pq; pq = next)
+ {
+ next = pq->next;
+ if (pq->tunnel == t)
+ {
+ queue_destroy (pq, GNUNET_YES);
+ }
+ }
+ if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
+ {
+ GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
+ peer_info->core_transmit = NULL;
+ }
+}
/**
* Destroy the tunnel and free any allocated resources linked to it.
tunnel_destroy (struct MeshTunnel *t)
{
struct MeshClient *c;
- struct MeshQueue *q;
- struct MeshQueue *qn;
- GNUNET_HashCode hash;
+ struct GNUNET_HashCode hash;
unsigned int i;
int r;
if (NULL == t)
return GNUNET_OK;
+ tree_iterate_children (t->tree, &tunnel_cancel_queues, t);
+
r = GNUNET_OK;
c = t->owner;
#if MESH_DEBUG
t);
GNUNET_CONTAINER_multihashmap_destroy (t->peers);
}
- q = t->queue_head;
- while (NULL != q)
- {
- if (NULL != q->data)
- GNUNET_free (q->data);
- qn = q->next;
- GNUNET_free (q);
- q = qn;
- /* TODO cancel core transmit ready in case it was active */
- }
+
+ GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
+ &tunnel_destroy_child,
+ t);
+ GNUNET_CONTAINER_multihashmap_destroy (t->children_fc);
+
tree_destroy (t->tree);
+
+ if (NULL != t->regex_ctx)
+ regex_cancel_search (t->regex_ctx);
if (NULL != t->dht_get_type)
GNUNET_DHT_get_stop (t->dht_get_type);
if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
GNUNET_SCHEDULER_cancel (t->timeout_task);
if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
GNUNET_SCHEDULER_cancel (t->path_refresh_task);
+
+ n_tunnels--;
+ GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
+ GNUNET_assert (0 <= n_tunnels);
GNUNET_free (t);
return r;
}
+/**
+ * Create a new tunnel
+ *
+ * @param owner Who is the owner of the tunnel (short ID).
+ * @param tid Tunnel Number of the tunnel.
+ * @param client Clients that owns the tunnel, NULL for foreign tunnels.
+ * @param local Tunnel Number for the tunnel, for the client point of view.
+ *
+ * @return A new initialized tunnel. NULL on error.
+ */
+static struct MeshTunnel *
+tunnel_new (GNUNET_PEER_Id owner,
+ MESH_TunnelNumber tid,
+ struct MeshClient *client,
+ MESH_TunnelNumber local)
+{
+ struct MeshTunnel *t;
+ struct GNUNET_HashCode hash;
+
+ if (n_tunnels >= max_tunnels && NULL == client)
+ return NULL;
+
+ t = GNUNET_malloc (sizeof (struct MeshTunnel));
+ t->id.oid = owner;
+ t->id.tid = tid;
+ t->fwd_queue_max = (max_msgs_queue / max_tunnels) + 1;
+ t->bck_queue_max = t->fwd_queue_max;
+ t->tree = tree_new (owner);
+ t->owner = client;
+ t->fwd_pid = (uint32_t) -1; // Next (expected) = 0
+ t->bck_pid = (uint32_t) -1; // Next (expected) = 0
+ t->bck_ack = INITIAL_WINDOW_SIZE - 1;
+ t->last_fwd_ack = INITIAL_WINDOW_SIZE - 1;
+ t->local_tid = local;
+ t->children_fc = GNUNET_CONTAINER_multihashmap_create (8);
+ n_tunnels++;
+ GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
+
+ GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
+ if (GNUNET_OK !=
+ GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
+ {
+ GNUNET_break (0);
+ tunnel_destroy (t);
+ if (NULL != client)
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
+ }
+ return NULL;
+ }
+
+ if (NULL != client)
+ {
+ GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
+ if (GNUNET_OK !=
+ GNUNET_CONTAINER_multihashmap_put (client->own_tunnels, &hash, t,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
+ {
+ tunnel_destroy (t);
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
+ return NULL;
+ }
+ }
+
+ return t;
+}
+
+
/**
* Removes an explicit path from a tunnel, freeing all intermediate nodes
* that are no longer needed, as well as nodes of no longer reachable peers.
* @return GNUNET_OK on success
*/
static int
-tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
+tunnel_destroy_iterator (void *cls, const struct GNUNET_HashCode * key, void *value)
{
struct MeshTunnel *t = value;
struct MeshClient *c = cls;
{
struct MeshTunnel *t = cls;
- if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
+ if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
return;
t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
tunnel_destroy (t);
* Resets the tunnel timeout. Starts it if no timeout was running.
*
* @param t Tunnel whose timeout to reset.
+ *
+ * TODO use heap to improve efficiency of scheduler.
*/
static void
tunnel_reset_timeout (struct MeshTunnel *t)
GNUNET_SCHEDULER_cancel (t->timeout_task);
t->timeout_task =
GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
- (REFRESH_PATH_TIME, 4), &tunnel_timeout, t);
+ (refresh_path_time, 4), &tunnel_timeout, t);
}
/******************************************************************************/
/**
- * Function called to notify a client about the socket
- * being ready to queue more data. "buf" will be
- * NULL and "size" zero if the socket was closed for
- * writing in the meantime.
+ * Function to send a create path packet to a peer.
*
* @param cls closure
* @param size number of bytes available in buf
* @return number of bytes written to buf
*/
static size_t
-send_core_create_path (void *cls, size_t size, void *buf)
+send_core_path_create (void *cls, size_t size, void *buf)
{
struct MeshPathInfo *info = cls;
struct GNUNET_MESH_ManipulatePath *msg;
struct GNUNET_PeerIdentity *peer_ptr;
- struct MeshPeerInfo *peer = info->peer;
struct MeshTunnel *t = info->t;
struct MeshPeerPath *p = info->path;
size_t size_needed;
+ uint32_t opt;
int i;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
if (size < size_needed || NULL == buf)
{
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "create path retransmit!\n");
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " buf: %p\n", buf);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " size: (%u/%u)\n", size,
- size_needed);
- info->peer->core_transmit[info->pos] =
- GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
- GNUNET_TIME_UNIT_FOREVER_REL,
- tree_get_first_hop (t->tree,
- peer->id),
- size_needed, &send_core_create_path,
- info);
+ GNUNET_break (0);
return 0;
}
- info->peer->core_transmit[info->pos] = NULL;
-#if MESH_DEBUG
- {
- struct GNUNET_PeerIdentity id;
-
- GNUNET_PEER_resolve (peer->id, &id);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " setting core_transmit %s [%u] to NULL\n",
- GNUNET_i2s (&id), info->pos);
- }
-#endif
msg = (struct GNUNET_MESH_ManipulatePath *) buf;
msg->header.size = htons (size_needed);
msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
msg->tid = ntohl (t->id.tid);
+ if (GNUNET_YES == t->speed_min)
+ opt = MESH_TUNNEL_OPT_SPEED_MIN;
+ if (GNUNET_YES == t->nobuffer)
+ opt |= MESH_TUNNEL_OPT_NOBUFFER;
+ msg->opt = htonl(opt);
+
peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
for (i = 0; i < p->length; i++)
{
/**
- * Function called to notify a client about the socket
- * being ready to queue more data. "buf" will be
- * NULL and "size" zero if the socket was closed for
- * writing in the meantime.
+ * Fill the core buffer
*
* @param cls closure (data itself)
* @param size number of bytes available in buf
* @return number of bytes written to buf
*/
static size_t
-send_core_data_multicast (void *cls, size_t size, void *buf)
+send_core_data_multicast (void *cls, size_t size, void *buf)
+{
+ struct MeshTransmissionDescriptor *info = cls;
+ size_t total_size;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Multicast callback.\n");
+ GNUNET_assert (NULL != info);
+ GNUNET_assert (NULL != info->peer);
+ total_size = info->mesh_data->data_len;
+ GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
+
+ if (total_size > size)
+ {
+ GNUNET_break (0);
+ return 0;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " copying data...\n");
+ memcpy (buf, info->mesh_data->data, total_size);
+#if MESH_DEBUG
+ {
+ struct GNUNET_MESH_Multicast *mc;
+ struct GNUNET_MessageHeader *mh;
+
+ mh = buf;
+ if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
+ {
+ mc = (struct GNUNET_MESH_Multicast *) mh;
+ mh = (struct GNUNET_MessageHeader *) &mc[1];
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " multicast, payload type %s\n",
+ GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " multicast, payload size %u\n", ntohs (mh->size));
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type %s\n",
+ GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
+ }
+ }
+#endif
+ data_descriptor_decrement_rc (info->mesh_data);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "freeing info...\n");
+ GNUNET_free (info);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "return %u\n", total_size);
+ return total_size;
+}
+
+
+/**
+ * Creates a path ack message in buf and frees all unused resources.
+ *
+ * @param cls closure (MeshTransmissionDescriptor)
+ * @param size number of bytes available in buf
+ * @param buf where the callee should write the message
+ * @return number of bytes written to buf
+ */
+static size_t
+send_core_path_ack (void *cls, size_t size, void *buf)
+{
+ struct MeshTransmissionDescriptor *info = cls;
+ struct GNUNET_MESH_PathACK *msg = buf;
+
+ GNUNET_assert (NULL != info);
+ if (sizeof (struct GNUNET_MESH_PathACK) > size)
+ {
+ GNUNET_break (0);
+ return 0;
+ }
+ msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
+ msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
+ GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
+ msg->tid = htonl (info->origin->tid);
+ msg->peer_id = my_full_id;
+
+ GNUNET_free (info);
+ /* TODO add signature */
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
+ return sizeof (struct GNUNET_MESH_PathACK);
+}
+
+
+/**
+ * Free a transmission that was already queued with all resources
+ * associated to the request.
+ *
+ * @param queue Queue handler to cancel.
+ * @param clear_cls Is it necessary to free associated cls?
+ */
+static void
+queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
+{
+ struct MeshTransmissionDescriptor *dd;
+ struct MeshPathInfo *path_info;
+
+ if (GNUNET_YES == clear_cls)
+ {
+ switch (queue->type)
+ {
+ case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
+ case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
+ case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type payload\n");
+ dd = queue->cls;
+ data_descriptor_decrement_rc (dd->mesh_data);
+ break;
+ case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
+ path_info = queue->cls;
+ path_destroy (path_info->path);
+ break;
+ default:
+ GNUNET_break (0);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type unknown!\n");
+ }
+ GNUNET_free_non_null (queue->cls);
+ }
+ GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
+ queue->peer->queue_tail,
+ queue);
+ GNUNET_free (queue);
+}
+
+
+/**
+ * @brief Get the next transmittable message from the queue.
+ *
+ * This will be the head, expect in the case of being a data packet
+ * not allowed by the destination peer.
+ *
+ * @param peer Destination peer.
+ *
+ * @return The next viable MeshPeerQueue element to send to that peer.
+ * NULL when there are no transmittable messages.
+ */
+struct MeshPeerQueue *
+queue_get_next (const struct MeshPeerInfo *peer)
+{
+ struct MeshPeerQueue *q;
+ struct MeshTunnel *t;
+ struct MeshTransmissionDescriptor *info;
+ struct MeshTunnelChildInfo *cinfo;
+ struct GNUNET_MESH_Unicast *ucast;
+ struct GNUNET_MESH_ToOrigin *to_orig;
+ struct GNUNET_MESH_Multicast *mcast;
+ struct GNUNET_PeerIdentity id;
+ uint32_t pid;
+ uint32_t ack;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* selecting message\n");
+ for (q = peer->queue_head; NULL != q; q = q->next)
+ {
+ t = q->tunnel;
+ info = q->cls;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "********* %s\n",
+ GNUNET_MESH_DEBUG_M2S(q->type));
+ switch (q->type)
+ {
+ case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
+ ucast = (struct GNUNET_MESH_Unicast *) info->mesh_data->data;
+ pid = ntohl (ucast->pid);
+ GNUNET_PEER_resolve (info->peer->id, &id);
+ cinfo = tunnel_get_neighbor_fc(t, &id);
+ ack = cinfo->fwd_ack;
+ break;
+ case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
+ to_orig = (struct GNUNET_MESH_ToOrigin *) info->mesh_data->data;
+ pid = ntohl (to_orig->pid);
+ ack = t->bck_ack;
+ break;
+ case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
+ mcast = (struct GNUNET_MESH_Multicast *) info->mesh_data->data;
+ pid = ntohl (mcast->pid);
+ GNUNET_PEER_resolve (info->peer->id, &id);
+ cinfo = tunnel_get_neighbor_fc(t, &id);
+ ack = cinfo->fwd_ack;
+ break;
+ default:
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "********* OK!\n");
+ return q;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "********* ACK: %u, PID: %u\n",
+ ack, pid);
+ if (GNUNET_NO == GMC_is_pid_bigger(pid, ack))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "********* OK!\n");
+ return q;
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "********* NEXT!\n");
+ }
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "********* nothing found\n");
+ return NULL;
+}
+
+
+/**
+ * Core callback to write a queued packet to core buffer
+ *
+ * @param cls Closure (peer info).
+ * @param size Number of bytes available in buf.
+ * @param buf Where the to write the message.
+ *
+ * @return number of bytes written to buf
+ */
+static size_t
+queue_send (void *cls, size_t size, void *buf)
{
- struct MeshTransmissionDescriptor *info = cls;
- size_t total_size;
+ struct MeshPeerInfo *peer = cls;
+ struct GNUNET_MessageHeader *msg;
+ struct MeshPeerQueue *queue;
+ struct MeshTunnel *t;
+ size_t data_size;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Multicast callback.\n");
- GNUNET_assert (NULL != info);
- GNUNET_assert (NULL != info->peer);
- total_size = info->mesh_data->data_len;
- GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
+ peer->core_transmit = NULL;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* Queue send\n");
+ queue = queue_get_next(peer);
- if (total_size > size)
- {
- /* Retry */
- struct GNUNET_PeerIdentity id;
+ /* Queue has no internal mesh traffic not sendable payload */
+ if (NULL == queue)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not ready, return\n");
+ if (NULL == peer->queue_head)
+ GNUNET_break(0); // Should've been canceled
+ return 0;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not empty\n");
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Multicast: retransmitting... (%u/%u)\n", size,
- total_size);
- GNUNET_PEER_resolve (info->peer->id, &id);
- info->peer->core_transmit[info->handler_n] =
- GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
- GNUNET_TIME_UNIT_FOREVER_REL, &id,
- total_size,
- &send_core_data_multicast, info);
- return 0;
- }
- info->peer->core_transmit[info->handler_n] = NULL;
- info->peer->infos[info->handler_n] = NULL;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " copying data...\n");
- memcpy (buf, info->mesh_data->data, total_size);
-#if MESH_DEBUG
- {
- struct GNUNET_MESH_Multicast *mc;
- struct GNUNET_MessageHeader *mh;
+ /* Check if buffer size is enough for the message */
+ if (queue->size > size)
+ {
+ struct GNUNET_PeerIdentity id;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "********* not enough room, reissue\n");
+ GNUNET_PEER_resolve (peer->id, &id);
+ peer->core_transmit =
+ GNUNET_CORE_notify_transmit_ready(core_handle,
+ 0,
+ 0,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &id,
+ queue->size,
+ &queue_send,
+ peer);
+ return 0;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* size ok\n");
- mh = buf;
- if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
+ t = queue->tunnel;
+ if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == queue->type)
{
- mc = (struct GNUNET_MESH_Multicast *) mh;
- mh = (struct GNUNET_MessageHeader *) &mc[1];
+ t->fwd_queue_n--;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " multicast, payload type %u\n", ntohs (mh->type));
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " multicast, payload size %u\n", ntohs (mh->size));
+ "********* unicast: t->q (%u/%u)\n",
+ t->fwd_queue_n, t->fwd_queue_max);
}
- else
+ else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == queue->type)
{
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type %u\n",
- ntohs (mh->type));
+ t->bck_queue_n--;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* to origin\n");
}
- }
-#endif
- data_descriptor_decrement_multicast (info->mesh_data);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "freeing info...\n");
- GNUNET_free (info);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "return %u\n", total_size);
- return total_size;
+
+ /* Fill buf */
+ switch (queue->type)
+ {
+ case 0:
+ case GNUNET_MESSAGE_TYPE_MESH_ACK:
+ case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
+ case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "********* raw: %s\n",
+ GNUNET_MESH_DEBUG_M2S (queue->type));
+ /* Fall through */
+ case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
+ case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
+ data_size = send_core_data_raw (queue->cls, size, buf);
+ msg = (struct GNUNET_MessageHeader *) buf;
+ switch (ntohs (msg->type)) // Type of preconstructed message
+ {
+ case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
+ tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
+ break;
+ case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
+ tunnel_send_bck_ack(t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
+ break;
+ default:
+ break;
+ }
+ break;
+ case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* multicast\n");
+ data_size = send_core_data_multicast(queue->cls, size, buf);
+ // t->fwd_queue_n--; FIXME fc
+ tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
+ break;
+ case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path create\n");
+ data_size = send_core_path_create(queue->cls, size, buf);
+ break;
+ case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path ack\n");
+ data_size = send_core_path_ack(queue->cls, size, buf);
+ break;
+ default:
+ GNUNET_break (0);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "********* type unknown: %u\n",
+ queue->type);
+ data_size = 0;
+ }
+
+ /* Free queue, but cls was freed by send_core_* */
+ queue_destroy (queue, GNUNET_NO);
+
+ if (GNUNET_YES == t->destroy && 0 == t->fwd_queue_n)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* destroying tunnel!\n");
+ tunnel_destroy (t);
+ }
+
+ /* If more data in queue, send next */
+ if (NULL != peer->queue_head)
+ {
+ struct GNUNET_PeerIdentity id;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* more data!\n");
+ GNUNET_PEER_resolve (peer->id, &id);
+ peer->core_transmit =
+ GNUNET_CORE_notify_transmit_ready(core_handle,
+ 0,
+ 0,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &id,
+ peer->queue_head->size,
+ &queue_send,
+ peer);
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* return %d\n", data_size);
+ return data_size;
}
/**
- * Function called to notify a client about the socket
- * being ready to queue more data. "buf" will be
- * NULL and "size" zero if the socket was closed for
- * writing in the meantime.
+ * Queue and pass message to core when possible.
*
- * @param cls closure (MeshTransmissionDescriptor)
- * @param size number of bytes available in buf
- * @param buf where the callee should write the message
- * @return number of bytes written to buf
+ * @param cls Closure (type dependant).
+ * @param type Type of the message, 0 for a raw message.
+ * @param size Size of the message.
+ * @param dst Neighbor to send message to.
+ * @param t Tunnel this message belongs to.
*/
-static size_t
-send_core_path_ack (void *cls, size_t size, void *buf)
+static void
+queue_add (void *cls, uint16_t type, size_t size,
+ struct MeshPeerInfo *dst, struct MeshTunnel *t)
{
- struct MeshTransmissionDescriptor *info = cls;
- struct GNUNET_MESH_PathACK *msg = buf;
+ struct MeshPeerQueue *queue;
+ unsigned int *max;
+ unsigned int *n;
- GNUNET_assert (NULL != info);
- if (info->peer)
+ n = NULL;
+ if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type ||
+ GNUNET_MESSAGE_TYPE_MESH_MULTICAST == type)
{
- info->peer->core_transmit[info->handler_n] = NULL;
+ n = &t->fwd_queue_n;
+ max = &t->fwd_queue_max;
}
- if (sizeof (struct GNUNET_MESH_PathACK) > size)
+ else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
{
- GNUNET_break (0);
- return 0;
+ n = &t->bck_queue_n;
+ max = &t->bck_queue_max;
}
- msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
- msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
- GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
- msg->tid = htonl (info->origin->tid);
- msg->peer_id = my_full_id;
- GNUNET_free (info);
- /* TODO add signature */
+ if (NULL != n) {
+ if (*n >= *max)
+ {
+ if (NULL == t->owner)
+ GNUNET_break_op(0); // TODO: kill connection?
+ else
+ GNUNET_break(0);
+ return; // Drop message
+ }
+ (*n)++;
+ }
+ queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
+ queue->cls = cls;
+ queue->type = type;
+ queue->size = size;
+ queue->peer = dst;
+ queue->tunnel = t;
+ GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
+ if (NULL == dst->core_transmit)
+ {
+ struct GNUNET_PeerIdentity id;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
- return sizeof (struct GNUNET_MESH_PathACK);
+ GNUNET_PEER_resolve (dst->id, &id);
+ dst->core_transmit =
+ GNUNET_CORE_notify_transmit_ready(core_handle,
+ 0,
+ 0,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &id,
+ size,
+ &queue_send,
+ dst);
+ }
}
MESH_TunnelNumber tid;
struct GNUNET_MESH_ManipulatePath *msg;
struct GNUNET_PeerIdentity *pi;
- GNUNET_HashCode hash;
+ struct GNUNET_HashCode hash;
struct MeshPeerPath *path;
struct MeshPeerInfo *dest_peer_info;
struct MeshPeerInfo *orig_peer_info;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
" path is for tunnel %s [%X].\n", GNUNET_i2s (pi), tid);
t = tunnel_get (pi, tid);
- if (NULL == t)
+ if (NULL == t) // FIXME only for INCOMING tunnels?
{
+ uint32_t opt;
+
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
- t = GNUNET_malloc (sizeof (struct MeshTunnel));
- t->id.oid = GNUNET_PEER_intern (pi);
- t->id.tid = tid;
+ t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
+ if (NULL == t)
+ {
+ // FIXME notify failure
+ return GNUNET_OK;
+ }
+ opt = ntohl (msg->opt);
+ t->speed_min = (0 != (opt & MESH_TUNNEL_OPT_SPEED_MIN)) ?
+ GNUNET_YES : GNUNET_NO;
+ t->nobuffer = (0 != (opt & MESH_TUNNEL_OPT_NOBUFFER)) ?
+ GNUNET_YES : GNUNET_NO;
+
+ if (GNUNET_YES == t->nobuffer)
+ {
+ t->bck_queue_max = 1;
+ t->fwd_queue_max = 1;
+ }
+
+ // FIXME only assign a local tid if a local client is interested (on demand)
while (NULL != tunnel_get_incoming (next_local_tid))
next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
t->local_tid_dest = next_local_tid++;
next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
- t->tree = tree_new (t->id.oid);
+ // FIXME end
- GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
- if (GNUNET_OK !=
- GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
- {
- tunnel_destroy (t);
- GNUNET_break (0);
- return GNUNET_OK;
- }
tunnel_reset_timeout (t);
GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
if (GNUNET_OK !=
/* create path: self not found in path through self */
GNUNET_break_op (0);
path_destroy (path);
- /* FIXME error. destroy tunnel? leave for timeout? */
- return 0;
+ tunnel_destroy (t);
+ return GNUNET_OK;
}
path_add_to_peers (path, GNUNET_NO);
tunnel_add_path (t, path, own_pos);
{
/* It is for us! Send ack. */
struct MeshTransmissionDescriptor *info;
- unsigned int j;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
/* New tunnel! Notify clients on data. */
t->peers = GNUNET_CONTAINER_multihashmap_create (4);
}
- GNUNET_break (GNUNET_OK ==
+ GNUNET_break (GNUNET_SYSERR !=
GNUNET_CONTAINER_multihashmap_put (t->peers,
&my_full_id.hashPubKey,
peer_info_get
(&my_full_id),
GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE));
- /* FIXME use send_message */
info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
info->origin = &t->id;
info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
GNUNET_assert (NULL != info->peer);
- j = peer_info_transmit_slot (info->peer);
- info->handler_n = j;
- info->peer->types[j] = GNUNET_MESSAGE_TYPE_MESH_PATH_ACK;
- info->peer->infos[j] = info;
- info->peer->core_transmit[j] =
- GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
- GNUNET_TIME_UNIT_FOREVER_REL, peer,
- sizeof (struct GNUNET_MESH_PathACK),
- &send_core_path_ack, info);
+ queue_add(info,
+ GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
+ sizeof (struct GNUNET_MESH_PathACK),
+ info->peer,
+ t);
}
else
{
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
if (own_pos < path->length - 1)
- send_message (message, &pi[own_pos + 1]);
+ send_message (message, &pi[own_pos + 1], t);
else
send_client_tunnel_disconnect(t, NULL);
* destroyed the tunnel and retransmitted to children.
* Safe to ignore.
*/
+ GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
return GNUNET_OK;
}
if (t->id.oid == myid)
send_clients_tunnel_destroy (t);
}
tunnel_send_destroy (t);
- tunnel_destroy (t);
+ t->destroy = GNUNET_YES;
+ // TODO: add timeout to destroy the tunnel anyway
return GNUNET_OK;
}
unsigned int atsi_count)
{
struct GNUNET_MESH_Unicast *msg;
+ struct GNUNET_PeerIdentity *neighbor;
+ struct MeshTunnelChildInfo *cinfo;
struct MeshTunnel *t;
- GNUNET_PEER_Id pid;
+ GNUNET_PEER_Id dest_id;
+ uint32_t pid;
+ uint32_t ttl;
size_t size;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a unicast packet from %s\n",
GNUNET_i2s (peer));
+ /* Check size */
size = ntohs (message->size);
if (size <
sizeof (struct GNUNET_MESH_Unicast) +
return GNUNET_OK;
}
msg = (struct GNUNET_MESH_Unicast *) message;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %u\n",
- ntohs (msg[1].header.type));
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
+ GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
+ /* Check tunnel */
t = tunnel_get (&msg->oid, ntohl (msg->tid));
if (NULL == t)
{
/* TODO notify back: we don't know this tunnel */
+ GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
+ GNUNET_break_op (0);
+ return GNUNET_OK;
+ }
+ pid = ntohl (msg->pid);
+ if (t->fwd_pid == pid)
+ {
+ GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ " Already seen pid %u, DROPPING!\n", pid);
+ return GNUNET_OK;
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " pid %u not seen yet, forwarding\n", pid);
+ }
+
+ t->skip += (pid - t->fwd_pid) - 1;
+ t->fwd_pid = pid;
+
+ if (GMC_is_pid_bigger (pid, t->last_fwd_ack))
+ {
+ GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
GNUNET_break_op (0);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received PID %u, ACK %u\n",
+ pid, t->last_fwd_ack);
return GNUNET_OK;
}
+
tunnel_reset_timeout (t);
- pid = GNUNET_PEER_search (&msg->destination);
- if (pid == myid)
+ dest_id = GNUNET_PEER_search (&msg->destination);
+ if (dest_id == myid)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
" it's for us! sending to clients...\n");
- send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
+ GNUNET_STATISTICS_update (stats, "# unicast received", 1, GNUNET_NO);
+ send_subscribed_clients (message, &msg[1].header, t);
+ tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
+ return GNUNET_OK;
+ }
+ ttl = ntohl (msg->ttl);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
+ if (ttl == 0)
+ {
+ GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
+ tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
return GNUNET_OK;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
" not for us, retransmitting...\n");
- send_message (message, tree_get_first_hop (t->tree, pid));
+
+ neighbor = tree_get_first_hop (t->tree, dest_id);
+ cinfo = tunnel_get_neighbor_fc (t, neighbor);
+ cinfo->pid = pid;
+ GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
+ &tunnel_add_skip,
+ &neighbor);
+ if (GNUNET_YES == t->nobuffer &&
+ GNUNET_YES == GMC_is_pid_bigger (pid, cinfo->fwd_ack))
+ {
+ GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
+ GNUNET_break_op (0);
+ return GNUNET_OK;
+ }
+ send_message (message, neighbor, t);
+ GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
return GNUNET_OK;
}
struct GNUNET_MESH_Multicast *msg;
struct MeshTunnel *t;
size_t size;
+ uint32_t pid;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a multicast packet from %s\n",
GNUNET_i2s (peer));
if (NULL == t)
{
/* TODO notify that we dont know that tunnel */
+ GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
GNUNET_break_op (0);
return GNUNET_OK;
}
- if (t->mid == ntohl (msg->mid))
+ pid = ntohl (msg->pid);
+ if (t->fwd_pid == pid)
{
- /* FIXME: already seen this packet, log dropping */
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- " Already seen mid %u, DROPPING!\n", t->mid);
+ /* already seen this packet, drop */
+ GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " Already seen pid %u, DROPPING!\n", pid);
+ tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
return GNUNET_OK;
}
else
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " mid %u not seen yet, forwarding\n", ntohl (msg->mid));
+ " pid %u not seen yet, forwarding\n", pid);
}
- t->mid = ntohl (msg->mid);
+ t->skip += (pid - t->fwd_pid) - 1;
+ t->fwd_pid = pid;
tunnel_reset_timeout (t);
/* Transmit to locally interested clients */
if (NULL != t->peers &&
GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
{
- send_subscribed_clients (message, &msg[1].header);
+ GNUNET_STATISTICS_update (stats, "# multicast received", 1, GNUNET_NO);
+ send_subscribed_clients (message, &msg[1].header, t);
+ tunnel_send_fwd_ack(t, GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ntohl (msg->ttl));
if (ntohl (msg->ttl) == 0)
{
- /* FIXME: ttl is 0, log dropping */
+ GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
+ tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
return GNUNET_OK;
}
+ GNUNET_STATISTICS_update (stats, "# multicast forwarded", 1, GNUNET_NO);
tunnel_send_multicast (t, message, GNUNET_NO);
return GNUNET_OK;
}
struct MeshTunnel *t;
size_t size;
+
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n",
GNUNET_i2s (peer));
size = ntohs (message->size);
return GNUNET_OK;
}
msg = (struct GNUNET_MESH_ToOrigin *) message;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %u\n",
- ntohs (msg[1].header.type));
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
+ GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
t = tunnel_get (&msg->oid, ntohl (msg->tid));
if (NULL == t)
{
/* TODO notify that we dont know this tunnel (whom)? */
+ GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
GNUNET_break_op (0);
return GNUNET_OK;
}
- if (t->id.oid == myid)
+ if (NULL != t->owner)
{
char cbuf[size];
struct GNUNET_MESH_ToOrigin *copy;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
" it's for us! sending to clients...\n");
- if (NULL == t->owner)
- {
- /* got data packet for ownerless tunnel */
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " no clients!\n");
- GNUNET_break_op (0);
- return GNUNET_OK;
- }
/* TODO signature verification */
memcpy (cbuf, message, size);
copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
copy->tid = htonl (t->local_tid);
+ GNUNET_STATISTICS_update (stats, "# to origin received", 1, GNUNET_NO);
GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
- ©->header, GNUNET_YES);
+ ©->header, GNUNET_NO);
+ tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
return GNUNET_OK;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
return GNUNET_OK;
}
GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
- send_message (message, &id);
+ send_message (message, &id, t);
+ GNUNET_STATISTICS_update (stats, "# to origin forwarded", 1, GNUNET_NO);
+
+ return GNUNET_OK;
+}
+
+
+/**
+ * Core handler for mesh network traffic point-to-point acks.
+ *
+ * @param cls closure
+ * @param message message
+ * @param peer peer identity this notification is about
+ * @param atsi performance data
+ * @param atsi_count number of records in 'atsi'
+ *
+ * @return GNUNET_OK to keep the connection open,
+ * GNUNET_SYSERR to close it (signal serious error)
+ */
+static int
+handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
+ const struct GNUNET_MessageHeader *message,
+ const struct GNUNET_ATS_Information *atsi,
+ unsigned int atsi_count)
+{
+ struct GNUNET_MESH_ACK *msg;
+ struct MeshTunnel *t;
+ uint32_t ack;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
+ GNUNET_i2s (peer));
+ msg = (struct GNUNET_MESH_ACK *) message;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
+ GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
+ t = tunnel_get (&msg->oid, ntohl (msg->tid));
+
+ if (NULL == t)
+ {
+ /* TODO notify that we dont know this tunnel (whom)? */
+ GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
+ GNUNET_break_op (0);
+ return GNUNET_OK;
+ }
+ ack = ntohl (msg->pid);
+
+ /* Is this a forward or backward ACK? */
+ if (tree_get_predecessor(t->tree) == GNUNET_PEER_search(peer))
+ {
+ struct MeshTunnelChildInfo *cinfo;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
+ cinfo = tunnel_get_neighbor_fc (t, peer);
+ cinfo->fwd_ack = ack;
+ tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
+ t->bck_ack = ack;
+ tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
+ }
+ // FIXME fc Unlock queues?
return GNUNET_OK;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
GNUNET_i2s (&my_full_id));
msg = (struct GNUNET_MESH_PathACK *) message;
- t = tunnel_get (&msg->oid, msg->tid);
+ t = tunnel_get (&msg->oid, ntohl(msg->tid));
if (NULL == t)
{
/* TODO notify that we don't know the tunnel */
+ GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
+ GNUNET_i2s (&msg->oid), ntohl(msg->tid));
return GNUNET_OK;
}
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
+ GNUNET_i2s (&msg->oid), ntohl(msg->tid));
peer_info = peer_info_get (&msg->peer_id);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
+ GNUNET_i2s (&msg->peer_id));
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
+ GNUNET_i2s (peer));
+
+ if (NULL != t->regex_ctx && t->regex_ctx->info->peer == peer_info->id)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "connect_by_string completed, stopping search\n");
+ regex_cancel_search (t->regex_ctx);
+ t->regex_ctx = NULL;
+ }
/* Add paths to peers? */
p = tree_get_path_to_peer (t->tree, peer_info->id);
GNUNET_break (0);
return GNUNET_OK;
}
- send_message (message, &id);
+ send_message (message, &id, t);
return GNUNET_OK;
}
{&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
{&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
sizeof (struct GNUNET_MESH_PathBroken)},
- {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY, 0},
+ {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
+ sizeof (struct GNUNET_MESH_TunnelDestroy)},
{&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
{&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
{&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
+ {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
+ sizeof (struct GNUNET_MESH_ACK)},
{&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
sizeof (struct GNUNET_MESH_PathACK)},
{NULL, 0, 0}
* @return GNUNET_OK on success
*/
static int
-deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
+deregister_app (void *cls, const struct GNUNET_HashCode * key, void *value)
{
+ struct GNUNET_CONTAINER_MultiHashMap *h = cls;
GNUNET_break (GNUNET_YES ==
- GNUNET_CONTAINER_multihashmap_remove (applications, key,
- value));
+ GNUNET_CONTAINER_multihashmap_remove (h, key, value));
return GNUNET_OK;
}
sizeof (struct GNUNET_MessageHeader);
char cbuf[size];
- if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
+ if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
{
return;
}
msg = (struct GNUNET_MESH_Multicast *) cbuf;
msg->header.size = htons (size);
msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
+ // FIXME: change type to != MULTICAST
msg->oid = my_full_id;
msg->tid = htonl (t->id.tid);
- msg->ttl = htonl (DEFAULT_TTL);
- msg->mid = htonl (t->mid + 1);
- t->mid++;
+ msg->ttl = htonl (default_ttl);
+ msg->pid = htonl (t->fwd_pid + 1);
+ t->fwd_pid++;
payload = (struct GNUNET_MessageHeader *) &msg[1];
payload->size = htons (sizeof (struct GNUNET_MessageHeader));
payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
tunnel_send_multicast (t, &msg->header, GNUNET_YES);
t->path_refresh_task =
- GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh, t);
+ GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
return;
}
*/
static void
dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
- const GNUNET_HashCode * key,
+ const struct GNUNET_HashCode * key,
const struct GNUNET_PeerIdentity *get_path,
unsigned int get_path_length,
const struct GNUNET_PeerIdentity *put_path,
*/
static void
dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
- const GNUNET_HashCode * key,
+ const struct GNUNET_HashCode * key,
const struct GNUNET_PeerIdentity *get_path,
unsigned int get_path_length,
const struct GNUNET_PeerIdentity *put_path,
unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
size_t size, const void *data)
{
- const struct GNUNET_PeerIdentity *pi = data;
+ const struct PBlock *pb = data;
+ const struct GNUNET_PeerIdentity *pi = &pb->id;
struct MeshTunnel *t = cls;
struct MeshPeerInfo *peer_info;
struct MeshPeerPath *p;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got type DHT result!\n");
- if (size != sizeof (struct GNUNET_PeerIdentity))
+ if (size != sizeof (struct PBlock))
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+ if (ntohl(pb->type) != t->type)
{
GNUNET_break_op (0);
return;
peer_info_connect (peer_info, t);
}
-
+
+/**
+ * Function to process DHT string to regex matching.
+ * Called on each result obtained for the DHT search.
+ *
+ * @param cls closure (search context)
+ * @param exp when will this value expire
+ * @param key key of the result
+ * @param get_path path of the get request (not used)
+ * @param get_path_length lenght of get_path (not used)
+ * @param put_path path of the put request (not used)
+ * @param put_path_length length of the put_path (not used)
+ * @param type type of the result
+ * @param size number of bytes in data
+ * @param data pointer to the result data
+ */
+static void
+dht_get_string_accept_handler (void *cls, struct GNUNET_TIME_Absolute exp,
+ const struct GNUNET_HashCode * key,
+ const struct GNUNET_PeerIdentity *get_path,
+ unsigned int get_path_length,
+ const struct GNUNET_PeerIdentity *put_path,
+ unsigned int put_path_length,
+ enum GNUNET_BLOCK_Type type,
+ size_t size, const void *data)
+{
+ const struct MeshRegexAccept *block = data;
+ struct MeshRegexSearchContext *ctx = cls;
+ struct MeshRegexSearchInfo *info = ctx->info;
+ struct MeshPeerPath *p;
+ struct MeshPeerInfo *peer_info;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got regex results from DHT!\n");
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", info->description);
+
+ peer_info = peer_info_get(&block->id);
+ p = path_build_from_dht (get_path, get_path_length, put_path,
+ put_path_length);
+ path_add_to_peers (p, GNUNET_NO);
+ path_destroy(p);
+
+ tunnel_add_peer (info->t, peer_info);
+ peer_info_connect (peer_info, info->t);
+ if (0 == info->peer)
+ {
+ info->peer = peer_info->id;
+ }
+ else
+ {
+ GNUNET_array_append (info->peers, info->n_peers, peer_info->id);
+ }
+
+ info->timeout = GNUNET_SCHEDULER_add_delayed (connect_timeout,
+ ®ex_connect_timeout,
+ info);
+
+ return;
+}
+
+
+/**
+ * Function to process DHT string to regex matching.
+ * Called on each result obtained for the DHT search.
+ *
+ * @param cls closure (search context)
+ * @param exp when will this value expire
+ * @param key key of the result
+ * @param get_path path of the get request (not used)
+ * @param get_path_length lenght of get_path (not used)
+ * @param put_path path of the put request (not used)
+ * @param put_path_length length of the put_path (not used)
+ * @param type type of the result
+ * @param size number of bytes in data
+ * @param data pointer to the result data
+ *
+ * TODO: re-issue the request after certain time? cancel after X results?
+ */
+static void
+dht_get_string_handler (void *cls, struct GNUNET_TIME_Absolute exp,
+ const struct GNUNET_HashCode * key,
+ const struct GNUNET_PeerIdentity *get_path,
+ unsigned int get_path_length,
+ const struct GNUNET_PeerIdentity *put_path,
+ unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
+ size_t size, const void *data)
+{
+ const struct MeshRegexBlock *block = data;
+ struct MeshRegexSearchContext *ctx = cls;
+ struct MeshRegexSearchInfo *info = ctx->info;
+ void *copy;
+ size_t len;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "DHT GET STRING RETURNED RESULTS\n");
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " key: %s\n", GNUNET_h2s (key));
+
+ copy = GNUNET_malloc (size);
+ memcpy (copy, data, size);
+ GNUNET_break (GNUNET_OK ==
+ GNUNET_CONTAINER_multihashmap_put(info->dht_get_results, key, copy,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
+ len = ntohl (block->n_proof);
+ {
+ char proof[len + 1];
+
+ memcpy (proof, &block[1], len);
+ proof[len] = '\0';
+ if (GNUNET_OK != GNUNET_REGEX_check_proof (proof, key))
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+ }
+ len = strlen (info->description);
+ if (len == ctx->position) // String processed
+ {
+ if (GNUNET_YES == ntohl (block->accepting))
+ {
+ regex_find_path(key, ctx);
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " block not accepting!\n");
+ // FIXME REGEX this block not successful, wait for more? start timeout?
+ }
+ return;
+ }
+ GNUNET_break (GNUNET_OK ==
+ GNUNET_MESH_regex_block_iterate (block, size,
+ ®ex_edge_iterator, ctx));
+ return;
+}
+
/******************************************************************************/
/********************* MESH LOCAL HANDLES **************************/
/******************************************************************************/
{
struct MeshClient *c;
struct MeshClient *next;
+ unsigned int i;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected\n");
if (client == NULL)
/* deregister clients applications */
if (NULL != c->apps)
{
- GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
+ GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, c->apps);
GNUNET_CONTAINER_multihashmap_destroy (c->apps);
}
if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
}
if (NULL != c->types)
GNUNET_CONTAINER_multihashmap_destroy (c->types);
+ for (i = 0; i < c->n_regex; i++)
+ {
+ GNUNET_free (c->regexes[i]);
+ }
+ GNUNET_free_non_null (c->regexes);
+ if (GNUNET_SCHEDULER_NO_TASK != c->regex_announce_task)
+ GNUNET_SCHEDULER_cancel (c->regex_announce_task);
next = c->next;
GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
GNUNET_free (c);
+ GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
c = next;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " done!\n");
if (napps > 0)
{
GNUNET_MESH_ApplicationType at;
- GNUNET_HashCode hc;
+ struct GNUNET_HashCode hc;
c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
for (i = 0; i < napps; i++)
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " app type: %u\n", at);
GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
/* store in clients hashmap */
- GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
+ GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, (void *) (long) at,
GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
/* store in global hashmap, for announcements */
GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
if (ntypes > 0)
{
uint16_t u16;
- GNUNET_HashCode hc;
+ struct GNUNET_HashCode hc;
t = (uint16_t *) & a[napps];
c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
c->incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
c->ignore_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
GNUNET_SERVER_notification_context_add (nc, client);
+ GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
GNUNET_SERVER_receive_done (client, GNUNET_OK);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
}
+/**
+ * Handler for clients announcing available services by a regular expression.
+ *
+ * @param cls closure
+ * @param client identification of the client
+ * @param message the actual message, which includes messages the client wants
+ */
+static void
+handle_local_announce_regex (void *cls, struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ struct MeshClient *c;
+ char *regex;
+ size_t len;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex started\n");
+
+ /* Sanity check for client registration */
+ if (NULL == (c = client_get (client)))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
+
+ len = ntohs (message->size) - sizeof(struct GNUNET_MessageHeader);
+ regex = GNUNET_malloc (len + 1);
+ memcpy (regex, &message[1], len);
+ regex[len] = '\0';
+ GNUNET_array_append (c->regexes, c->n_regex, regex);
+ if (GNUNET_SCHEDULER_NO_TASK == c->regex_announce_task)
+ {
+ c->regex_announce_task = GNUNET_SCHEDULER_add_now(&announce_regex, c);
+ }
+ else
+ {
+ regex_put(regex);
+ }
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex processed\n");
+}
+
+
/**
* Handler for requests of new tunnels
*
struct GNUNET_MESH_TunnelMessage *t_msg;
struct MeshTunnel *t;
struct MeshClient *c;
- GNUNET_HashCode hash;
+ MESH_TunnelNumber tid;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
/* Sanity check for tunnel numbering */
- if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
+ tid = ntohl (t_msg->tunnel_id);
+ if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
{
GNUNET_break (0);
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
/* Sanity check for duplicate tunnel IDs */
- if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
+ if (NULL != tunnel_get_by_local_id (c, tid))
{
GNUNET_break (0);
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
- t = GNUNET_malloc (sizeof (struct MeshTunnel));
while (NULL != tunnel_get_by_pi (myid, next_tid))
next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
- t->id.tid = next_tid++;
- next_tid = next_tid & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
- t->id.oid = myid;
- t->local_tid = ntohl (t_msg->tunnel_id);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s [%x] (%x)\n",
- GNUNET_i2s (&my_full_id), t->id.tid, t->local_tid);
- t->owner = c;
- t->peers = GNUNET_CONTAINER_multihashmap_create (32);
-
- GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
- if (GNUNET_OK !=
- GNUNET_CONTAINER_multihashmap_put (c->own_tunnels, &hash, t,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
-
- GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
- if (GNUNET_OK !=
- GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
+ t = tunnel_new (myid, next_tid++, c, tid);
+ if (NULL == t)
{
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Tunnel creation failed.\n");
GNUNET_break (0);
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
- t->tree = tree_new (myid);
+ next_tid = next_tid & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s [%x] (%x)\n",
+ GNUNET_i2s (&my_full_id), t->id.tid, t->local_tid);
+ t->peers = GNUNET_CONTAINER_multihashmap_create (32);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel created\n");
GNUNET_SERVER_receive_done (client, GNUNET_OK);
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
+
/* Message sanity check */
if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
{
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
+
tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
/* Retrieve tunnel */
t = tunnel_get_by_local_id(c, tid);
if (NULL == t)
{
- GNUNET_break (0);
GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
+ GNUNET_break (0);
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
/* Don't try to ACK the client about the tunnel_destroy multicast packet */
t->owner = NULL;
tunnel_send_destroy (t);
- tunnel_destroy (t);
+ t->destroy = GNUNET_YES;
+ // The tunnel will be destroyed when the last message is transmitted.
GNUNET_SERVER_receive_done (client, GNUNET_OK);
return;
}
+/**
+ * Handler for requests of seeting tunnel's speed.
+ *
+ * @param cls Closure (unused).
+ * @param client Identification of the client.
+ * @param message The actual message.
+ */
+static void
+handle_local_tunnel_speed (void *cls, struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ struct GNUNET_MESH_TunnelMessage *tunnel_msg;
+ struct MeshClient *c;
+ struct MeshTunnel *t;
+ MESH_TunnelNumber tid;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Got a SPEED request from client!\n");
+
+ /* Sanity check for client registration */
+ if (NULL == (c = client_get (client)))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
+
+ tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
+
+ /* Retrieve tunnel */
+ tid = ntohl (tunnel_msg->tunnel_id);
+ t = tunnel_get_by_local_id(c, tid);
+ if (NULL == t)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " tunnel %X not found\n", tid);
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+
+ switch (ntohs(message->type))
+ {
+ case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN:
+ t->speed_min = GNUNET_YES;
+ break;
+ case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX:
+ t->speed_min = GNUNET_NO;
+ break;
+ default:
+ GNUNET_break (0);
+ }
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+}
+
+
+/**
+ * Handler for requests of seeting tunnel's buffering policy.
+ *
+ * @param cls Closure (unused).
+ * @param client Identification of the client.
+ * @param message The actual message.
+ */
+static void
+handle_local_tunnel_buffer (void *cls, struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ struct GNUNET_MESH_TunnelMessage *tunnel_msg;
+ struct MeshClient *c;
+ struct MeshTunnel *t;
+ MESH_TunnelNumber tid;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Got a BUFFER request from client!\n");
+
+ /* Sanity check for client registration */
+ if (NULL == (c = client_get (client)))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
+
+ tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
+
+ /* Retrieve tunnel */
+ tid = ntohl (tunnel_msg->tunnel_id);
+ t = tunnel_get_by_local_id(c, tid);
+ if (NULL == t)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+
+ switch (ntohs(message->type))
+ {
+ case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER:
+ t->nobuffer = GNUNET_NO;
+ break;
+ case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER:
+ t->nobuffer = GNUNET_YES;
+ break;
+ default:
+ GNUNET_break (0);
+ }
+
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+}
+
+
/**
* Handler for connection requests to new peers
*
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
peer_msg = (struct GNUNET_MESH_PeerControl *) message;
+
/* Sanity check for message size */
if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
{
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
+
peer_msg = (struct GNUNET_MESH_PeerControl *) message;
+
/* Sanity check for message size */
if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
{
return;
}
- /* Ok, delete peer from tunnel */
- GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
- &peer_msg->peer.hashPubKey);
+ /* Ok, delete peer from tunnel */
+ GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
+ &peer_msg->peer.hashPubKey);
+
+ send_destroy_path (t, peer_info->id);
+ tunnel_delete_peer (t, peer_info->id);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+}
+
+/**
+ * Handler for blacklist requests of peers in a tunnel
+ *
+ * @param cls closure
+ * @param client identification of the client
+ * @param message the actual message (PeerControl)
+ *
+ * FIXME implement DHT block bloomfilter
+ */
+static void
+handle_local_blacklist (void *cls, struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ struct GNUNET_MESH_PeerControl *peer_msg;
+ struct MeshClient *c;
+ struct MeshTunnel *t;
+ MESH_TunnelNumber tid;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER BLACKLIST request\n");
+ /* Sanity check for client registration */
+ if (NULL == (c = client_get (client)))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
+
+ peer_msg = (struct GNUNET_MESH_PeerControl *) message;
+
+ /* Sanity check for message size */
+ if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+
+ /* Tunnel exists? */
+ tid = ntohl (peer_msg->tunnel_id);
+ t = tunnel_get_by_local_id (c, tid);
+ if (NULL == t)
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
+
+ GNUNET_array_append(t->blacklisted, t->nblacklisted,
+ GNUNET_PEER_intern(&peer_msg->peer));
+}
+
+
+/**
+ * Handler for unblacklist requests of peers in a tunnel
+ *
+ * @param cls closure
+ * @param client identification of the client
+ * @param message the actual message (PeerControl)
+ */
+static void
+handle_local_unblacklist (void *cls, struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ struct GNUNET_MESH_PeerControl *peer_msg;
+ struct MeshClient *c;
+ struct MeshTunnel *t;
+ MESH_TunnelNumber tid;
+ GNUNET_PEER_Id pid;
+ unsigned int i;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER UNBLACKLIST request\n");
+ /* Sanity check for client registration */
+ if (NULL == (c = client_get (client)))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
+
+ peer_msg = (struct GNUNET_MESH_PeerControl *) message;
+
+ /* Sanity check for message size */
+ if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+
+ /* Tunnel exists? */
+ tid = ntohl (peer_msg->tunnel_id);
+ t = tunnel_get_by_local_id (c, tid);
+ if (NULL == t)
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
+
+ /* if peer is not known, complain */
+ pid = GNUNET_PEER_search (&peer_msg->peer);
+ if (0 == pid)
+ {
+ GNUNET_break (0);
+ return;
+ }
- send_destroy_path (t, peer_info->id);
- tunnel_delete_peer (t, peer_info->id);
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
- return;
+ /* search and remove from list */
+ for (i = 0; i < t->nblacklisted; i++)
+ {
+ if (t->blacklisted[i] == pid)
+ {
+ t->blacklisted[i] = t->blacklisted[t->nblacklisted - 1];
+ GNUNET_array_grow (t->blacklisted, t->nblacklisted, t->nblacklisted - 1);
+ return;
+ }
+ }
+
+ /* if peer hasn't been blacklisted, complain */
+ GNUNET_break (0);
}
struct GNUNET_MESH_ConnectPeerByType *connect_msg;
struct MeshClient *c;
struct MeshTunnel *t;
- GNUNET_HashCode hash;
+ struct GNUNET_HashCode hash;
MESH_TunnelNumber tid;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got connect by type request\n");
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
+
/* Sanity check for message size */
if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
ntohs (connect_msg->header.size))
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " looking in DHT for %s\n",
GNUNET_h2s (&hash));
t->dht_get_type =
- GNUNET_DHT_get_start (dht_handle, GNUNET_TIME_UNIT_FOREVER_REL,
- GNUNET_BLOCK_TYPE_TEST, &hash, 10U,
+ GNUNET_DHT_get_start (dht_handle,
+ GNUNET_BLOCK_TYPE_MESH_PEER_BY_TYPE,
+ &hash,
+ dht_replication_level,
GNUNET_DHT_RO_RECORD_ROUTE |
- GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, NULL, 0,
+ GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
+ NULL, 0,
&dht_get_type_handler, t);
GNUNET_SERVER_receive_done (client, GNUNET_OK);
}
+/**
+ * Handler for connection requests to new peers by a string service description.
+ *
+ * @param cls closure
+ * @param client identification of the client
+ * @param message the actual message, which includes messages the client wants
+ */
+static void
+handle_local_connect_by_string (void *cls, struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ struct GNUNET_MESH_ConnectPeerByString *msg;
+ struct MeshRegexSearchContext *ctx;
+ struct MeshRegexSearchInfo *info;
+ struct GNUNET_DHT_GetHandle *get_h;
+ struct GNUNET_HashCode key;
+ struct MeshTunnel *t;
+ struct MeshClient *c;
+ MESH_TunnelNumber tid;
+ const char *string;
+ size_t size;
+ size_t len;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Connect by string started\n");
+ msg = (struct GNUNET_MESH_ConnectPeerByString *) message;
+ size = htons (message->size);
+
+ /* Sanity check for client registration */
+ if (NULL == (c = client_get (client)))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
+
+ /* Message size sanity check */
+ if (sizeof(struct GNUNET_MESH_ConnectPeerByString) >= size)
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+
+ /* Tunnel exists? */
+ tid = ntohl (msg->tunnel_id);
+ t = tunnel_get_by_local_id (c, tid);
+ if (NULL == t)
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+
+ /* Does client own tunnel? */
+ if (t->owner->handle != client)
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " on tunnel %s [%u]\n",
+ GNUNET_i2s(&my_full_id),
+ t->id.tid);
+
+ /* Only one connect_by_string allowed at the same time! */
+ /* FIXME: allow more, return handle at api level to cancel, document */
+ if (NULL != t->regex_ctx)
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+
+ /* Find string itself */
+ len = size - sizeof(struct GNUNET_MESH_ConnectPeerByString);
+ string = (const char *) &msg[1];
+
+ /* Initialize context */
+ size = GNUNET_REGEX_get_first_key(string, len, &key);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " consumed %u bits out of %u\n", size, len);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " looking for %s\n", GNUNET_h2s (&key));
+
+ info = GNUNET_malloc (sizeof (struct MeshRegexSearchInfo));
+ info->t = t;
+ info->description = GNUNET_malloc (len + 1);
+ memcpy (info->description, string, len);
+ info->description[len] = '\0';
+ info->dht_get_handles = GNUNET_CONTAINER_multihashmap_create(32);
+ info->dht_get_results = GNUNET_CONTAINER_multihashmap_create(32);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " string: %s\n", info->description);
+
+ ctx = GNUNET_malloc (sizeof (struct MeshRegexSearchContext));
+ ctx->position = size;
+ ctx->info = info;
+ t->regex_ctx = ctx;
+
+ GNUNET_array_append (info->contexts, info->n_contexts, ctx);
+
+ /* Start search in DHT */
+ get_h = GNUNET_DHT_get_start (dht_handle, /* handle */
+ GNUNET_BLOCK_TYPE_MESH_REGEX, /* type */
+ &key, /* key to search */
+ dht_replication_level, /* replication level */
+ GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
+ NULL, /* xquery */ // FIXME BLOOMFILTER
+ 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
+ &dht_get_string_handler, ctx);
+
+ GNUNET_break (GNUNET_OK ==
+ GNUNET_CONTAINER_multihashmap_put(info->dht_get_handles,
+ &key,
+ get_h,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
+
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "connect by string processed\n");
+}
+
+
/**
* Handler for client traffic directed to one peer
*
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
+
data_msg = (struct GNUNET_MESH_Unicast *) message;
+
/* Sanity check for message size */
size = ntohs (message->size);
if (sizeof (struct GNUNET_MESH_Unicast) +
return;
}
+ /* PID should be as expected */
+ if (ntohl (data_msg->pid) != t->fwd_pid + 1)
+ {
+ GNUNET_break (0);
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "Unicast PID, expected %u, got %u\n",
+ t->fwd_pid + 1, ntohl (data_msg->pid));
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+
/* Ok, everything is correct, send the message
* (pretend we got it from a mesh peer)
*/
{
+ /* Work around const limitation */
char buf[ntohs (message->size)] GNUNET_ALIGN;
struct GNUNET_MESH_Unicast *copy;
- /* Work around const limitation */
copy = (struct GNUNET_MESH_Unicast *) buf;
memcpy (buf, data_msg, size);
copy->oid = my_full_id;
copy->tid = htonl (t->id.tid);
+ copy->ttl = htonl (default_ttl);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
" calling generic handler...\n");
handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
}
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
GNUNET_SERVER_receive_done (client, GNUNET_OK);
+
return;
}
const struct GNUNET_MessageHeader *message)
{
struct GNUNET_MESH_ToOrigin *data_msg;
- struct GNUNET_PeerIdentity id;
+ struct MeshTunnelClientInfo *clinfo;
struct MeshClient *c;
struct MeshTunnel *t;
MESH_TunnelNumber tid;
size_t size;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Got a ToOrigin request from a client!\n");
/* Sanity check for client registration */
if (NULL == (c = client_get (client)))
{
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
+
data_msg = (struct GNUNET_MESH_ToOrigin *) message;
+
/* Sanity check for message size */
size = ntohs (message->size);
if (sizeof (struct GNUNET_MESH_ToOrigin) +
/* Tunnel exists? */
tid = ntohl (data_msg->tid);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Got a ToOrigin request from a client! Tunnel %X\n", tid);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
{
GNUNET_break (0);
t = tunnel_get_by_local_id (c, tid);
if (NULL == t)
{
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
+ if (t->owner == c)
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " (client is owner)\n");
+ else
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " (client is leaf)\n");
GNUNET_break (0);
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
/* It should be sent by someone who has this as incoming tunnel. */
- if (-1 == client_knows_tunnel (c, t))
+ if (GNUNET_NO == client_knows_tunnel (c, t))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+
+ /* PID should be as expected */
+ clinfo = tunnel_get_client_fc (t, c);
+ if (ntohl (data_msg->pid) != clinfo->bck_pid + 1)
{
GNUNET_break (0);
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "To Origin PID, expected %u, got %u\n",
+ clinfo->bck_pid + 1,
+ ntohl (data_msg->pid));
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
- GNUNET_PEER_resolve (t->id.oid, &id);
/* Ok, everything is correct, send the message
* (pretend we got it from a mesh peer)
*/
+ clinfo->bck_pid++;
{
char buf[ntohs (message->size)] GNUNET_ALIGN;
struct GNUNET_MESH_ToOrigin *copy;
/* Work around const limitation */
copy = (struct GNUNET_MESH_ToOrigin *) buf;
memcpy (buf, data_msg, size);
- copy->oid = id;
+ GNUNET_PEER_resolve (t->id.oid, ©->oid);
copy->tid = htonl (t->id.tid);
+ copy->ttl = htonl (default_ttl);
+ if (ntohl (copy->pid) != (t->bck_pid + 1))
+ {
+ GNUNET_break (0);
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "To Origin PID, expected %u, got %u\n",
+ t->bck_pid + 1,
+ ntohl (copy->pid));
+ return;
+ }
+ t->bck_pid++;
copy->sender = my_full_id;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
" calling generic handler...\n");
handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
}
GNUNET_SERVER_receive_done (client, GNUNET_OK);
+
return;
}
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
+
data_msg = (struct GNUNET_MESH_Multicast *) message;
+
/* Sanity check for message size */
if (sizeof (struct GNUNET_MESH_Multicast) +
sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
if (NULL == t)
{
GNUNET_break (0);
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
+ if (t->owner == c)
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " (client is owner)\n");
+ else
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " (client is leaf)\n"); GNUNET_break (0);
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
return;
}
+ /* PID should be as expected */
+ if (ntohl (data_msg->pid) != t->fwd_pid + 1)
+ {
+ GNUNET_break (0);
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "Multicast PID, expected %u, got %u\n",
+ t->fwd_pid + 1, ntohl (data_msg->pid));
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+
{
char buf[ntohs (message->size)] GNUNET_ALIGN;
struct GNUNET_MESH_Multicast *copy;
memcpy (buf, message, ntohs (message->size));
copy->oid = my_full_id;
copy->tid = htonl (t->id.tid);
- copy->ttl = htonl (DEFAULT_TTL);
- copy->mid = htonl (t->mid + 1);
+ copy->ttl = htonl (default_ttl);
+ GNUNET_assert (ntohl (copy->pid) == (t->fwd_pid + 1));
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
" calling generic handler...\n");
handle_mesh_data_multicast (client, &my_full_id, ©->header, NULL, 0);
return;
}
+
+/**
+ * Handler for client's ACKs for payload traffic.
+ *
+ * @param cls Closure (unused).
+ * @param client Identification of the client.
+ * @param message The actual message.
+ */
+static void
+handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ struct GNUNET_MESH_LocalAck *msg;
+ struct MeshTunnel *t;
+ struct MeshClient *c;
+ MESH_TunnelNumber tid;
+ uint32_t ack;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
+ /* Sanity check for client registration */
+ if (NULL == (c = client_get (client)))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
+
+ msg = (struct GNUNET_MESH_LocalAck *) message;
+
+ /* Tunnel exists? */
+ tid = ntohl (msg->tunnel_id);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
+ t = tunnel_get_by_local_id (c, tid);
+ if (NULL == t)
+ {
+ GNUNET_break (0); // FIXME fc
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
+ if (t->owner == c)
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " (client is owner)\n");
+ else
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " (client is leaf)\n");
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+
+ ack = ntohl (msg->max_pid);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
+
+ /* Does client own tunnel? I.E: Is this and ACK for BCK traffic? */
+ if (NULL != t->owner && t->owner->handle == client)
+ {
+ /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
+ t->bck_ack = ack;
+ tunnel_send_bck_ack(t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
+ }
+ else
+ {
+ /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
+ tunnel_set_client_fwd_ack (t, c, ack);
+ tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
+ }
+
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+
+ return;
+}
+
+
/**
* Functions to handle messages from clients
*/
static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
{&handle_local_new_client, NULL,
GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
+ {&handle_local_announce_regex, NULL,
+ GNUNET_MESSAGE_TYPE_MESH_LOCAL_ANNOUNCE_REGEX, 0},
{&handle_local_tunnel_create, NULL,
GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
sizeof (struct GNUNET_MESH_TunnelMessage)},
{&handle_local_tunnel_destroy, NULL,
GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
sizeof (struct GNUNET_MESH_TunnelMessage)},
+ {&handle_local_tunnel_speed, NULL,
+ GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN,
+ sizeof (struct GNUNET_MESH_TunnelMessage)},
+ {&handle_local_tunnel_speed, NULL,
+ GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX,
+ sizeof (struct GNUNET_MESH_TunnelMessage)},
+ {&handle_local_tunnel_buffer, NULL,
+ GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER,
+ sizeof (struct GNUNET_MESH_TunnelMessage)},
+ {&handle_local_tunnel_buffer, NULL,
+ GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER,
+ sizeof (struct GNUNET_MESH_TunnelMessage)},
{&handle_local_connect_add, NULL,
GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
sizeof (struct GNUNET_MESH_PeerControl)},
{&handle_local_connect_del, NULL,
GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
sizeof (struct GNUNET_MESH_PeerControl)},
+ {&handle_local_blacklist, NULL,
+ GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_BLACKLIST,
+ sizeof (struct GNUNET_MESH_PeerControl)},
+ {&handle_local_unblacklist, NULL,
+ GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_UNBLACKLIST,
+ sizeof (struct GNUNET_MESH_PeerControl)},
{&handle_local_connect_by_type, NULL,
GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
sizeof (struct GNUNET_MESH_ConnectPeerByType)},
+ {&handle_local_connect_by_string, NULL,
+ GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_STRING, 0},
{&handle_local_unicast, NULL,
GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
{&handle_local_to_origin, NULL,
GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
{&handle_local_multicast, NULL,
GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
+ {&handle_local_ack, NULL,
+ GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
+ sizeof (struct GNUNET_MESH_LocalAck)},
{NULL, NULL, 0, 0}
};
core_init (void *cls, struct GNUNET_CORE_Handle *server,
const struct GNUNET_PeerIdentity *identity)
{
+ static int i = 0;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
core_handle = server;
if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
NULL == server)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
- GNUNET_SCHEDULER_shutdown ();
+ GNUNET_SCHEDULER_shutdown (); // Try gracefully
+ if (10 < i++)
+ GNUNET_abort(); // Try harder
}
return;
}
+
/**
* Method called whenever a given peer connects.
*
GNUNET_PEER_change_rc (myid, 1);
GNUNET_PEER_change_rc (peer_info->id, 1);
peer_info_add_path (peer_info, path, GNUNET_YES);
+ GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
return;
}
+
/**
* Method called whenever a peer disconnects.
*
core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
{
struct MeshPeerInfo *pi;
- unsigned int i;
+ struct MeshPeerQueue *q;
+ struct MeshPeerQueue *n;
DEBUG_CONN ("Peer disconnected\n");
pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
GNUNET_break (0);
return;
}
- for (i = 0; i < CORE_QUEUE_SIZE; i++)
+ q = pi->queue_head;
+ while (NULL != q)
{
- /* TODO: notify that the transmission failed */
- peer_info_cancel_transmission (pi, i);
+ n = q->next;
+ if (q->peer == pi)
+ {
+ /* try to reroute this traffic instead */
+ queue_destroy(q, GNUNET_YES);
+ }
+ q = n;
}
peer_info_remove_path (pi, pi->id, myid);
if (myid == pi->id)
{
DEBUG_CONN (" (self)\n");
}
+ GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
return;
}
* GNUNET_NO if not.
*/
static int
-shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
+shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
{
struct MeshTunnel *t = value;
* GNUNET_NO if not.
*/
static int
-shutdown_peer (void *cls, const GNUNET_HashCode * key, void *value)
+shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
{
struct MeshPeerInfo *p = value;
+ struct MeshPeerQueue *q;
+ struct MeshPeerQueue *n;
+ q = p->queue_head;
+ while (NULL != q)
+ {
+ n = q->next;
+ if (q->peer == p)
+ {
+ queue_destroy(q, GNUNET_YES);
+ }
+ q = n;
+ }
peer_info_destroy (p);
return GNUNET_YES;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
server_handle = server;
core_handle = GNUNET_CORE_connect (c, /* Main configuration */
- CORE_QUEUE_SIZE, /* queue size */
NULL, /* Closure passed to MESH functions */
&core_init, /* Call core_init once connected */
&core_connect, /* Handle connects */
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_
- ("Mesh service is lacking key configuration settings. Exiting.\n"));
+ ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
+ "hostkey");
+ GNUNET_SCHEDULER_shutdown ();
+ return;
+ }
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
+ &refresh_path_time))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _
+ ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
+ "refresh path time");
GNUNET_SCHEDULER_shutdown ();
return;
}
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_time (c, "MESH", "APP_ANNOUNCE_TIME",
+ &app_announce_time))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _
+ ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
+ "app announce time");
+ GNUNET_SCHEDULER_shutdown ();
+ return;
+ }
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
+ &id_announce_time))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _
+ ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
+ "id announce time");
+ GNUNET_SCHEDULER_shutdown ();
+ return;
+ }
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_time (c, "MESH", "UNACKNOWLEDGED_WAIT",
+ &unacknowledged_wait_time))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _
+ ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
+ "unacknowledged wait time");
+ GNUNET_SCHEDULER_shutdown ();
+ return;
+ }
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
+ &connect_timeout))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _
+ ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
+ "connect timeout");
+ GNUNET_SCHEDULER_shutdown ();
+ return;
+ }
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
+ &max_msgs_queue))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _
+ ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
+ "max msgs queue");
+ GNUNET_SCHEDULER_shutdown ();
+ return;
+ }
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
+ &max_tunnels))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _
+ ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
+ "max tunnels");
+ GNUNET_SCHEDULER_shutdown ();
+ return;
+ }
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
+ &default_ttl))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ _
+ ("Mesh service is lacking key configuration settings (%s). Using default (%u).\n"),
+ "default ttl", 64);
+ default_ttl = 64;
+ }
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
+ &dht_replication_level))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ _
+ ("Mesh service is lacking key configuration settings (%s). Using default (%u).\n"),
+ "dht replication level", 10);
+ dht_replication_level = 10;
+ }
+
+
my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
GNUNET_free (keyfile);
if (my_private_key == NULL)
GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
&my_full_id.hashPubKey);
myid = GNUNET_PEER_intern (&my_full_id);
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "Mesh for peer [%s] starting\n",
+ GNUNET_i2s(&my_full_id));
-// // transport_handle = GNUNET_TRANSPORT_connect(c,
-// // &my_full_id,
-// // NULL,
-// // NULL,
-// // NULL,
-// // NULL);
+// transport_handle = GNUNET_TRANSPORT_connect(c,
+// &my_full_id,
+// NULL,
+// NULL,
+// NULL,
+// NULL);
dht_handle = GNUNET_DHT_connect (c, 64);
if (dht_handle == NULL)
GNUNET_break (0);
}
+ stats = GNUNET_STATISTICS_create ("mesh", c);
+
+
next_tid = 0;
next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
types = GNUNET_CONTAINER_multihashmap_create (32);
GNUNET_SERVER_add_handlers (server_handle, client_handlers);
- nc = GNUNET_SERVER_notification_context_create (server_handle,
- LOCAL_QUEUE_SIZE);
+ nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
GNUNET_SERVER_disconnect_notify (server_handle,
&handle_local_client_disconnect, NULL);
NULL)) ? 0 : 1;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");
+ INTERVAL_SHOW;
+
return ret;
}
projects / oweals / gnunet.git / blobdiff