X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=src%2Fmesh%2Fgnunet-service-mesh.c;h=b17412b0243884c2ae6dc940663a545432993d12;hb=03b222dc177798ed9448cdeca67ba4051c6397e3;hp=70366c7328fb8bc3c4450b98ab341b237e048a9c;hpb=f8f90fbb5bc4d4f6fd478ebfebfc25143719844f;p=oweals%2Fgnunet.git diff --git a/src/mesh/gnunet-service-mesh.c b/src/mesh/gnunet-service-mesh.c index 70366c732..b17412b02 100644 --- a/src/mesh/gnunet-service-mesh.c +++ b/src/mesh/gnunet-service-mesh.c @@ -24,7 +24,7 @@ * @author Bartlomiej Polot * * FIXME in progress: - * - keep queues until receiving ACK + * - when sending in-order buffered data, wait for client ACKs * * TODO: * - relay corking down to core @@ -51,9 +51,8 @@ #define MESH_MAX_POLL_TIME GNUNET_TIME_relative_multiply (\ GNUNET_TIME_UNIT_MINUTES,\ 10) -#define MESH_RETRANSMIT_TIME GNUNET_TIME_relative_multiply (\ - GNUNET_TIME_UNIT_SECONDS,\ - 5) +#define MESH_RETRANSMIT_TIME GNUNET_TIME_UNIT_SECONDS +#define MESH_RETRANSMIT_MARGIN 4 #if MESH_DEBUG_CONNECTION #define DEBUG_CONN(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__) @@ -96,7 +95,7 @@ if (0 < __count)\ /******************************************************************************/ /** FWD declaration */ -struct MeshPeerInfo; +struct MeshPeer; struct MeshClient; @@ -118,7 +117,7 @@ struct MeshPeerQueue /** * Peer this transmission is directed to. */ - struct MeshPeerInfo *peer; + struct MeshPeer *peer; /** * Tunnel this message belongs to. @@ -145,7 +144,7 @@ struct MeshPeerQueue /** * Struct containing all information regarding a given peer */ -struct MeshPeerInfo +struct MeshPeer { /** * ID of the peer @@ -284,6 +283,12 @@ struct MESH_TunnelID }; +/** + * Data needed for reliable tunnel endpoint retransmission management. + */ +struct MeshTunnelReliability; + + /** * Info needed to retry a message in case it gets lost. */ @@ -303,10 +308,10 @@ struct MeshReliableMessage /** * ID of the message (ACK needed to free) */ - uint32_t id; + uint32_t mid; /** - * When was this message issued (to calculate ACK delay) FIXME update with traffic + * When was this message issued (to calculate ACK delay) */ struct GNUNET_TIME_Absolute timestamp; @@ -314,9 +319,6 @@ struct MeshReliableMessage }; -/** - * Data needed for reliable tunnel endpoint retransmission management. - */ struct MeshTunnelReliability { /** @@ -327,29 +329,44 @@ struct MeshTunnelReliability /** * DLL of messages sent and not yet ACK'd. */ - struct MeshReliableMessage *head_sent; - struct MeshReliableMessage *tail_sent; + struct MeshReliableMessage *head_sent; + struct MeshReliableMessage *tail_sent; + + /** + * Messages pending + */ + unsigned int n_sent; + + /** + * Next MID to use. + */ + uint32_t mid_sent; /** * DLL of messages received out of order. */ - struct MeshReliableMessage *head_recv; - struct MeshReliableMessage *tail_recv; + struct MeshReliableMessage *head_recv; + struct MeshReliableMessage *tail_recv; + + /** + * Next MID expected. + */ + uint32_t mid_recv; /** * Task to resend/poll in case no ACK is received. */ - GNUNET_SCHEDULER_TaskIdentifier retry_task; + GNUNET_SCHEDULER_TaskIdentifier retry_task; /** * Counter for exponential backoff. */ - struct GNUNET_TIME_Relative retry_timer; + struct GNUNET_TIME_Relative retry_timer; /** - * How long does it usually take to get an ACK. FIXME update with traffic + * How long does it usually take to get an ACK. */ - struct GNUNET_TIME_Relative expected_delay; + struct GNUNET_TIME_Relative expected_delay; }; @@ -453,7 +470,13 @@ struct MeshTunnel * Task to keep the used paths alive at the owner, * time tunnel out on all the other peers. */ - GNUNET_SCHEDULER_TaskIdentifier maintenance_task; + GNUNET_SCHEDULER_TaskIdentifier fwd_maintenance_task; + + /** + * Task to keep the used paths alive at the destination, + * time tunnel out on all the other peers. + */ + GNUNET_SCHEDULER_TaskIdentifier bck_maintenance_task; /** * Path being used for the tunnel. @@ -488,7 +511,7 @@ struct MeshTunnel /** * Struct containing information about a client of the service - * + * * TODO: add a list of 'waiting' ports */ struct MeshClient @@ -563,10 +586,6 @@ mesh_debug (void *cls, int success) } #endif -/* FIXME */ -unsigned int debug_fwd_ack; -unsigned int debug_bck_ack; - #endif /******************************************************************************/ @@ -607,7 +626,7 @@ static unsigned long long dht_replication_level; static unsigned long long max_tunnels; /** - * How many messages *in total* are we willing to queue, divided by number of + * How many messages *in total* are we willing to queue, divided by number of * tunnels to get tunnel queue size. */ static unsigned long long max_msgs_queue; @@ -651,9 +670,9 @@ static unsigned long long n_tunnels; static struct GNUNET_CONTAINER_MultiHashMap32 *incoming_tunnels; /** - * Peers known, indexed by PeerIdentity (MeshPeerInfo). + * Peers known, indexed by PeerIdentity (MeshPeer). */ -static struct GNUNET_CONTAINER_MultiHashMap *peers; +static struct GNUNET_CONTAINER_MultiPeerMap *peers; /* * Handle to communicate with transport @@ -698,12 +717,7 @@ static struct GNUNET_PeerIdentity my_full_id; /** * Own private key. */ -static struct GNUNET_CRYPTO_EccPrivateKey *my_private_key; - -/** - * Own public key. - */ -static struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded my_public_key; +static struct GNUNET_CRYPTO_EddsaPrivateKey *my_private_key; /** * Tunnel ID for the next created tunnel (global tunnel number). @@ -758,26 +772,26 @@ dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp, /** - * Retrieve the MeshPeerInfo stucture associated with the peer, create one + * Retrieve the MeshPeer stucture associated with the peer, create one * and insert it in the appropriate 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 * +static struct MeshPeer * peer_get (const struct GNUNET_PeerIdentity *peer); /** - * Retrieve the MeshPeerInfo stucture associated with the peer, create one + * Retrieve the MeshPeer stucture associated with the peer, create one * and insert it in the appropriate 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 * +static struct MeshPeer * peer_get_short (const GNUNET_PEER_Id peer); @@ -817,6 +831,16 @@ static struct MeshTunnel * tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid); +/** + * Change the tunnel state. + * + * @param t Tunnel whose ttate to change. + * @param state New state. + */ +static void +tunnel_change_state (struct MeshTunnel *t, enum MeshTunnelState state); + + /** * Notify a tunnel that a connection has broken that affects at least * some of its peers. @@ -833,11 +857,29 @@ tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1, GNUNET_PEER_Id p2); +/** + * Send FWD keepalive packets for a tunnel. + * + * @param cls Closure (tunnel for which to send the keepalive). + * @param tc Notification context. + */ +static void +tunnel_fwd_keepalive (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc); + +/** + * Send BCK keepalive packets for a tunnel. + * + * @param cls Closure (tunnel for which to send the keepalive). + * @param tc Notification context. + */ +static void +tunnel_bck_keepalive (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc); + /** * @brief Use the given path for the tunnel. * Update the next and prev hops (and RCs). * (Re)start the path refresh in case the tunnel is locally owned. - * + * * @param t Tunnel to update. * @param p Path to use. */ @@ -846,22 +888,39 @@ tunnel_use_path (struct MeshTunnel *t, struct MeshPeerPath *p); /** * Tunnel is empty: destroy it. - * + * * Notifies all participants (peers, cleints) about the destruction. - * - * @param t Tunnel to destroy. + * + * @param t Tunnel to destroy. */ static void tunnel_destroy_empty (struct MeshTunnel *t); +/** + * Destroy the tunnel. + * + * This function does not generate any warning traffic to clients or peers. + * + * Tasks: + * Remove the tunnel from peer_info's and clients' hashmaps. + * Cancel messages belonging to this tunnel queued to neighbors. + * Free any allocated resources linked to the tunnel. + * + * @param t the tunnel to destroy + * + * @return GNUNET_OK on success + */ +static int +tunnel_destroy (struct MeshTunnel *t); + /** * @brief Queue and pass message to core when possible. - * + * * If type is payload (UNICAST, TO_ORIGIN, MULTICAST) checks for queue status * and accounts for it. In case the queue is full, the message is dropped and * a break issued. - * - * Otherwise, message is treated as internal and allowed to go regardless of + * + * Otherwise, message is treated as internal and allowed to go regardless of * queue status. * * @param cls Closure (@c type dependant). It will be used by queue_send to @@ -873,7 +932,7 @@ tunnel_destroy_empty (struct MeshTunnel *t); */ static void queue_add (void *cls, uint16_t type, size_t size, - struct MeshPeerInfo *dst, struct MeshTunnel *t); + struct MeshPeer *dst, struct MeshTunnel *t); /** @@ -899,7 +958,7 @@ queue_destroy (struct MeshPeerQueue *queue, int clear_cls); * NULL when there are no transmittable messages. */ struct MeshPeerQueue * -queue_get_next (const struct MeshPeerInfo *peer); +queue_get_next (const struct MeshPeer *peer); /** @@ -915,6 +974,52 @@ static size_t queue_send (void *cls, size_t size, void *buf); +/** + * Dummy function to separate declarations from definitions in function list. + */ +void +__mesh_divider______________________________________________________________(); + + +static const char * +GNUNET_MESH_DEBUG_S2S (enum MeshTunnelState s) +{ + static char buf[128]; + + switch (s) + { + /** + * Uninitialized status, should never appear in operation. + */ + case MESH_TUNNEL_NEW: return "MESH_TUNNEL_NEW"; + + /** + * Path to the peer not known yet + */ + case MESH_TUNNEL_SEARCHING: return "MESH_TUNNEL_SEARCHING"; + + /** + * Request sent, not yet answered. + */ + case MESH_TUNNEL_WAITING: return "MESH_TUNNEL_WAITING"; + + /** + * Peer connected and ready to accept data + */ + case MESH_TUNNEL_READY: return "MESH_TUNNEL_READY"; + + /** + * Peer connected previosly but not responding + */ + case MESH_TUNNEL_RECONNECTING: return "MESH_TUNNEL_RECONNECTING"; + + default: + sprintf (buf, "%u (UNKNOWN STATE)", s); + return buf; + } +} + + /******************************************************************************/ /************************ PERIODIC FUNCTIONS ****************************/ /******************************************************************************/ @@ -929,6 +1034,7 @@ static void announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) { struct PBlock block; + struct GNUNET_HashCode phash; if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN)) { @@ -940,10 +1046,10 @@ announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) * - Adapt X to churn */ DEBUG_DHT ("DHT_put for ID %s started.\n", GNUNET_i2s (&my_full_id)); - + GNUNET_CRYPTO_hash (&my_full_id, sizeof (my_full_id), &phash); block.id = my_full_id; GNUNET_DHT_put (dht_handle, /* DHT handle */ - &my_full_id.hashPubKey, /* Key to use */ + &phash, dht_replication_level, /* Replication level */ GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */ GNUNET_BLOCK_TYPE_MESH_PEER, /* Block type */ @@ -973,16 +1079,7 @@ announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) static struct MeshClient * client_get (struct GNUNET_SERVER_Client *client) { - struct MeshClient *c; - - c = clients_head; - while (NULL != c) - { - if (c->handle == client) - return c; - c = c->next; - } - return NULL; + return GNUNET_SERVER_client_get_user_context (client, struct MeshClient); } @@ -996,29 +1093,32 @@ client_get (struct GNUNET_SERVER_Client *client) static void client_delete_tunnel (struct MeshClient *c, struct MeshTunnel *t) { + int res; + if (c == t->owner) { - GNUNET_assert (GNUNET_YES == - GNUNET_CONTAINER_multihashmap32_remove (c->own_tunnels, - t->local_tid, - t)); + res = GNUNET_CONTAINER_multihashmap32_remove (c->own_tunnels, + t->local_tid, t); + if (GNUNET_YES != res) + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client_delete_tunnel owner KO\n"); } if (c == t->client) { - GNUNET_assert (GNUNET_YES == - GNUNET_CONTAINER_multihashmap32_remove (c->incoming_tunnels, - t->local_tid_dest, - t)); + res = GNUNET_CONTAINER_multihashmap32_remove (c->incoming_tunnels, + t->local_tid_dest, t); + if (GNUNET_YES != res) + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client_delete_tunnel client KO\n"); } } + /** * Notify the appropriate client that a new incoming tunnel was created. * * @param t Tunnel that was created. */ static void -send_client_tunnel_create (struct MeshTunnel *t) +send_local_tunnel_create (struct MeshTunnel *t) { struct GNUNET_MESH_TunnelMessage msg; @@ -1028,10 +1128,10 @@ send_client_tunnel_create (struct MeshTunnel *t) msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE); msg.tunnel_id = htonl (t->local_tid_dest); msg.port = htonl (t->port); - msg.options = 0; - msg.options |= GNUNET_YES == t->reliable ? GNUNET_MESH_OPTION_RELIABLE : 0; - msg.options |= GNUNET_YES == t->nobuffer ? GNUNET_MESH_OPTION_NOBUFFER : 0; - msg.options = htonl (msg.options); + msg.opt = 0; + msg.opt |= GNUNET_YES == t->reliable ? GNUNET_MESH_OPTION_RELIABLE : 0; + msg.opt |= GNUNET_YES == t->nobuffer ? GNUNET_MESH_OPTION_NOBUFFER : 0; + msg.opt = htonl (msg.opt); GNUNET_PEER_resolve (t->id.oid, &msg.peer); GNUNET_SERVER_notification_context_unicast (nc, t->client->handle, &msg.header, GNUNET_NO); @@ -1039,162 +1139,57 @@ send_client_tunnel_create (struct MeshTunnel *t) /** - * Notify dest client that the incoming tunnel is no longer valid. + * Notify a client that the incoming tunnel is no longer valid. * - * @param c Client to notify.. * @param t Tunnel that is destroyed. + * @param fwd Forward notification (owner->dest)? */ static void -send_client_tunnel_destroy (struct MeshClient *c, struct MeshTunnel *t) +send_local_tunnel_destroy (struct MeshTunnel *t, int fwd) { struct GNUNET_MESH_TunnelMessage msg; + struct MeshClient *c; + c = fwd ? t->client : t->owner; if (NULL == c) { GNUNET_break (0); return; } - if (c != t->client && c != t->owner) - { - GNUNET_break (0); - 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); + msg.tunnel_id = htonl (fwd ? t->local_tid_dest : t->local_tid); msg.port = htonl (0); - memset(&msg.peer, 0, sizeof (msg.peer)); + memset (&msg.peer, 0, sizeof (msg.peer)); + msg.opt = htonl (0); GNUNET_SERVER_notification_context_unicast (nc, c->handle, &msg.header, GNUNET_NO); } /** - * Iterator over all the peers to remove the oldest not-used entry. - * - * @param cls Closure (unsued). - * @param key ID of the peer. - * @param value Peer_Info of the peer. - * - * FIXME implement - */ -static int -peer_info_timeout (void *cls, - const struct GNUNET_HashCode *key, - void *value) -{ - return GNUNET_YES; -} - -/** - * Retrieve the MeshPeerInfo stucture associated with the peer, create one - * and insert it in the appropriate 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_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)); - if (GNUNET_CONTAINER_multihashmap_size (peers) > max_peers) - { - GNUNET_CONTAINER_multihashmap_iterate (peers, - &peer_info_timeout, - NULL); - } - GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info, - GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST); - peer_info->id = GNUNET_PEER_intern (peer); - } - peer_info->last_contact = GNUNET_TIME_absolute_get(); - - return peer_info; -} - - -/** - * Retrieve the MeshPeerInfo stucture associated with the peer, create one - * and insert it in the appropriate 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_get_short (const GNUNET_PEER_Id peer) -{ - struct GNUNET_PeerIdentity id; - - GNUNET_PEER_resolve (peer, &id); - return peer_get (&id); -} - - -/** - * Choose the best path towards a peer considering the tunnel properties. - * - * @param peer The destination peer. - * @param t The tunnel the path is for. + * Build a local ACK message and send it to a local client. * - * @return Best current known path towards the peer, if any. + * @param t Tunnel on which to send the ACK. + * @param c Client to whom send the ACK. + * @param is_fwd Set to GNUNET_YES for FWD ACK (dest->owner) */ -static struct MeshPeerPath * -peer_get_best_path (const struct MeshPeerInfo *peer, const struct MeshTunnel *t) +static void +send_local_ack (struct MeshTunnel *t, + struct MeshClient *c, + int is_fwd) { - struct MeshPeerPath *best_p; - struct MeshPeerPath *p; - unsigned int best_cost; - unsigned int cost; + struct GNUNET_MESH_LocalAck msg; - best_p = p = peer->path_head; - best_cost = cost = p->length; - while (NULL != p) - { - if ((cost = p->length) < best_cost) - { - best_cost = cost; - best_p = p; - } - p = p->next; - } - return best_p; + msg.header.size = htons (sizeof (msg)); + msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK); + msg.tunnel_id = htonl (is_fwd ? t->local_tid : t->local_tid_dest); + GNUNET_SERVER_notification_context_unicast (nc, + c->handle, + &msg.header, + GNUNET_NO); } -/** - * 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 GNUNET_MessageHeader *msg = cls; - size_t total_size; - - GNUNET_assert (NULL != msg); - total_size = ntohs (msg->size); - - if (total_size > size) - { - GNUNET_break (0); - return 0; - } - memcpy (buf, msg, total_size); - GNUNET_free (cls); - return total_size; -} /** @@ -1211,7 +1206,7 @@ send_prebuilt_message (const struct GNUNET_MessageHeader *message, struct MeshTunnel *t) { struct GNUNET_PeerIdentity id; - struct MeshPeerInfo *neighbor; + struct MeshPeer *neighbor; struct MeshPeerPath *p; void *data; size_t size; @@ -1269,7 +1264,7 @@ send_prebuilt_message (const struct GNUNET_MessageHeader *message, } } #endif - GNUNET_break (0); // FIXME sometimes fails (testing disconnect?) + GNUNET_break (0); GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " no direct connection to %s\n", GNUNET_i2s (&id)); @@ -1293,9 +1288,9 @@ send_prebuilt_message (const struct GNUNET_MessageHeader *message, * @param t Tunnel for which the path is created. */ static void -send_create_path (struct MeshTunnel *t) +send_path_create (struct MeshTunnel *t) { - struct MeshPeerInfo *neighbor; + struct MeshPeer *neighbor; GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Send create path\n"); neighbor = peer_get_short (t->next_hop); @@ -1305,7 +1300,7 @@ send_create_path (struct MeshTunnel *t) (t->path->length * sizeof (struct GNUNET_PeerIdentity)), neighbor, t); - t->state = MESH_TUNNEL_WAITING; + tunnel_change_state (t, MESH_TUNNEL_WAITING); } @@ -1315,56 +1310,335 @@ send_create_path (struct MeshTunnel *t) * @param t Tunnel which to confirm. */ static void -send_path_ack (struct MeshTunnel *t) +send_path_ack (struct MeshTunnel *t) { - struct MeshPeerInfo *peer; - - peer = peer_get_short (t->prev_hop); + struct MeshPeer *neighbor; + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Send path ack\n"); + neighbor = peer_get_short (t->prev_hop); queue_add (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK, sizeof (struct GNUNET_MESH_PathACK), - peer, + neighbor, t); + tunnel_change_state (t, MESH_TUNNEL_WAITING); } /** - * Try to establish a new connection to this peer in 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. + * Build an ACK message and queue it to send to the given peer. * - * @param peer PeerInfo of the peer. - * @param t Tunnel for which to create the path, if possible. + * @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 -peer_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t) +send_ack (struct MeshTunnel *t, GNUNET_PEER_Id peer, uint32_t ack) { - struct MeshPeerPath *p; + struct GNUNET_MESH_ACK msg; - if (NULL != peer->path_head) - { - p = peer_get_best_path (peer, t); - tunnel_use_path (t, p); - send_create_path (t); - } - else if (NULL == peer->dhtget) - { - struct GNUNET_PeerIdentity id; + 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); - GNUNET_PEER_resolve (peer->id, &id); - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - " Starting DHT GET for peer %s\n", GNUNET_i2s (&id)); - 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 */ + send_prebuilt_message (&msg.header, peer, t); +} + + +/** + * 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 GNUNET_MessageHeader *msg = cls; + size_t total_size; + + GNUNET_assert (NULL != msg); + total_size = ntohs (msg->size); + + if (total_size > size) + { + GNUNET_break (0); + return 0; + } + memcpy (buf, msg, total_size); + GNUNET_free (cls); + return total_size; +} + + +/** + * Function to send a create path packet to a peer. + * + * @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 + */ +static size_t +send_core_path_create (void *cls, size_t size, void *buf) +{ + struct MeshTunnel *t = cls; + struct GNUNET_MESH_CreateTunnel *msg; + struct GNUNET_PeerIdentity *peer_ptr; + struct MeshPeerPath *p = t->path; + size_t size_needed; + uint32_t opt; + int i; + + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n"); + size_needed = + sizeof (struct GNUNET_MESH_CreateTunnel) + + p->length * sizeof (struct GNUNET_PeerIdentity); + + if (size < size_needed || NULL == buf) + { + GNUNET_break (0); + return 0; + } + msg = (struct GNUNET_MESH_CreateTunnel *) buf; + msg->header.size = htons (size_needed); + msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE); + msg->tid = ntohl (t->id.tid); + + opt = 0; + if (GNUNET_YES == t->nobuffer) + opt |= GNUNET_MESH_OPTION_NOBUFFER; + if (GNUNET_YES == t->reliable) + opt |= GNUNET_MESH_OPTION_RELIABLE; + msg->opt = htonl (opt); + msg->port = htonl (t->port); + + peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1]; + for (i = 0; i < p->length; i++) + { + GNUNET_PEER_resolve (p->peers[i], peer_ptr++); + } + + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "CREATE PATH (%u bytes long) sent!\n", size_needed); + return size_needed; +} + + +/** + * 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 MeshTunnel *t = cls; + struct GNUNET_MESH_PathACK *msg = buf; + + GNUNET_assert (NULL != t); + if (sizeof (struct GNUNET_MESH_PathACK) > size) + { + GNUNET_break (0); + return 0; + } + t->prev_fc.last_ack_sent = t->nobuffer ? 0 : t->queue_max - 1; + msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK)); + msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK); + GNUNET_PEER_resolve (t->id.oid, &msg->oid); + msg->tid = htonl (t->id.tid); + msg->peer_id = my_full_id; + msg->ack = htonl (t->prev_fc.last_ack_sent); + + /* TODO add signature */ + + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n"); + return sizeof (struct GNUNET_MESH_PathACK); +} + + +/** + * Iterator over all the peers to remove the oldest not-used entry. + * + * @param cls Closure (unsued). + * @param key ID of the peer. + * @param value Peer_Info of the peer. + * + * FIXME implement + */ +static int +peer_timeout (void *cls, + const struct GNUNET_PeerIdentity *key, + void *value) +{ + return GNUNET_YES; +} + + +/** + * Retrieve the MeshPeer stucture associated with the peer, create one + * and insert it in the appropriate structures if the peer is not known yet. + * + * @param peer Full identity of the peer. + * + * @return Existing or newly created peer info. + */ +static struct MeshPeer * +peer_get (const struct GNUNET_PeerIdentity *peer_id) +{ + struct MeshPeer *peer; + + peer = GNUNET_CONTAINER_multipeermap_get (peers, peer_id); + if (NULL == peer) + { + peer = GNUNET_new (struct MeshPeer); + if (GNUNET_CONTAINER_multipeermap_size (peers) > max_peers) + { + GNUNET_CONTAINER_multipeermap_iterate (peers, + &peer_timeout, + NULL); + } + GNUNET_CONTAINER_multipeermap_put (peers, peer_id, peer, + GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST); + peer->id = GNUNET_PEER_intern (peer_id); + } + peer->last_contact = GNUNET_TIME_absolute_get(); + + return peer; +} + + +/** + * Retrieve the MeshPeer stucture associated with the peer, create one + * and insert it in the appropriate structures if the peer is not known yet. + * + * @param peer Short identity of the peer. + * + * @return Existing or newly created peer info. + */ +static struct MeshPeer * +peer_get_short (const GNUNET_PEER_Id peer) +{ + return peer_get (GNUNET_PEER_resolve2 (peer)); +} + + +/** + * Select which PID to POLL for, to compensate for lost messages. + * + * @param pi Peer we want to poll. + * @param t Tunnel about which we want to poll. + * + * @return PID to use, either last sent or first_in_queue - 1 + */ +static uint32_t +peer_get_first_payload_pid (struct MeshPeer *p, struct MeshTunnel *t) +{ + struct MeshPeerQueue *q; + uint16_t type; + + type = p->id == t->next_hop ? GNUNET_MESSAGE_TYPE_MESH_UNICAST : + GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN; + + for (q = p->queue_head; NULL != q; q = q->next) + { + if (q->type == type && q->tunnel == t) + { + struct GNUNET_MESH_Data *msg = q->cls; + + /* Pretend that the last one sent was the previous to this */ + return ntohl (msg->pid) - 1; + } + } + + /* No data in queue, use last sent */ + { + struct MeshFlowControl *fc; + + fc = p->id == t->next_hop ? &t->next_fc : &t->prev_fc; + return fc->last_pid_sent; + } +} + + +/** + * Choose the best path towards a peer considering the tunnel properties. + * + * @param peer The destination peer. + * @param t The tunnel the path is for. + * + * @return Best current known path towards the peer, if any. + */ +static struct MeshPeerPath * +peer_get_best_path (const struct MeshPeer *peer, const struct MeshTunnel *t) +{ + struct MeshPeerPath *best_p; + struct MeshPeerPath *p; + unsigned int best_cost; + unsigned int cost; + + best_p = p = peer->path_head; + best_cost = cost = p->length; + while (NULL != p) + { + if ((cost = p->length) < best_cost) + { + best_cost = cost; + best_p = p; + } + p = p->next; + } + return best_p; +} + + +/** + * Try to establish a new connection to this peer in 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_connect (struct MeshPeer *peer, struct MeshTunnel *t) +{ + struct MeshPeerPath *p; + struct GNUNET_HashCode phash; + + if (NULL != peer->path_head) + { + p = peer_get_best_path (peer, t); + tunnel_use_path (t, p); + send_path_create (t); + } + else if (NULL == peer->dhtget) + { + struct GNUNET_PeerIdentity id; + + GNUNET_PEER_resolve (peer->id, &id); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Starting DHT GET for peer %s\n", + GNUNET_i2s (&id)); + GNUNET_CRYPTO_hash (&id, sizeof (my_full_id), &phash); + peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */ + GNUNET_BLOCK_TYPE_MESH_PEER, /* type */ + &phash, /* key to search */ + dht_replication_level, /* replication level */ + GNUNET_DHT_RO_RECORD_ROUTE | + GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, + NULL, /* xquery */ 0, /* xquery bits */ &dht_get_id_handler, peer); - t->state = MESH_TUNNEL_SEARCHING; + tunnel_change_state (t, MESH_TUNNEL_SEARCHING); } else { @@ -1374,47 +1648,130 @@ peer_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t) } +/** + * @brief Re-initiate traffic to this peer if necessary. + * + * Check if there is traffic queued towards this peer + * and the core transmit handle is NULL (traffic was stalled). + * If so, call core tmt rdy. + * + * @param peer_id Short ID of peer to which initiate traffic. + */ +static void +peer_unlock_queue (GNUNET_PEER_Id peer_id) +{ + struct MeshPeer *peer; + struct MeshPeerQueue *q; + size_t size; + + peer = peer_get_short (peer_id); + if (NULL != peer->core_transmit) + return; + + q = queue_get_next (peer); + if (NULL == q) + return; + + size = q->size; + peer->core_transmit = + GNUNET_CORE_notify_transmit_ready (core_handle, + GNUNET_NO, + 0, + GNUNET_TIME_UNIT_FOREVER_REL, + GNUNET_PEER_resolve2 (peer->id), + size, + &queue_send, + peer); +} + + +/** + * Cancel all transmissions towards a neighbor that belong to a certain tunnel. + * + * @param neighbor Short ID of the neighbor to whom cancel the transmissions. + * @param t Tunnel which to cancel. + */ +static void +peer_cancel_queues (GNUNET_PEER_Id neighbor, struct MeshTunnel *t) +{ + struct MeshPeer *peer; + struct MeshPeerQueue *q; + struct MeshPeerQueue *next; + struct MeshFlowControl *fc; + + if (0 == neighbor) + return; /* Was local peer, 0'ed in tunnel_destroy_iterator */ + peer = peer_get_short (neighbor); + for (q = peer->queue_head; NULL != q; q = next) + { + next = q->next; + if (q->tunnel == t) + { + if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == q->type || + GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == q->type) + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "peer_cancel_queues %s\n", + GNUNET_MESH_DEBUG_M2S (q->type)); + } + queue_destroy (q, GNUNET_YES); + } + } + if (NULL == peer->queue_head && NULL != peer->core_transmit) + { + GNUNET_CORE_notify_transmit_ready_cancel (peer->core_transmit); + peer->core_transmit = NULL; + } + fc = neighbor == t->next_hop ? &t->next_fc : &t->prev_fc; + if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task) + { + GNUNET_SCHEDULER_cancel (fc->poll_task); + fc->poll_task = GNUNET_SCHEDULER_NO_TASK; + } +} + + /** * Destroy the peer_info and free any allocated resources linked to it * - * @param pi The peer_info to destroy. + * @param peer The peer_info to destroy. * * @return GNUNET_OK on success */ static int -peer_info_destroy (struct MeshPeerInfo *pi) +peer_destroy (struct MeshPeer *peer) { struct GNUNET_PeerIdentity id; struct MeshPeerPath *p; struct MeshPeerPath *nextp; unsigned int i; - GNUNET_PEER_resolve (pi->id, &id); - GNUNET_PEER_change_rc (pi->id, -1); + GNUNET_PEER_resolve (peer->id, &id); + GNUNET_PEER_change_rc (peer->id, -1); if (GNUNET_YES != - GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi)) + GNUNET_CONTAINER_multipeermap_remove (peers, &id, peer)) { GNUNET_break (0); GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "removing peer %s, not in hashmap\n", GNUNET_i2s (&id)); } - if (NULL != pi->dhtget) + if (NULL != peer->dhtget) { - GNUNET_DHT_get_stop (pi->dhtget); + GNUNET_DHT_get_stop (peer->dhtget); } - p = pi->path_head; + p = peer->path_head; while (NULL != p) { nextp = p->next; - GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p); + GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p); path_destroy (p); p = nextp; } - for (i = 0; i < pi->ntunnels; i++) - tunnel_destroy_empty (pi->tunnels[i]); - GNUNET_array_grow (pi->tunnels, pi->ntunnels, 0); - GNUNET_free (pi); + for (i = 0; i < peer->ntunnels; i++) + tunnel_destroy_empty (peer->tunnels[i]); + GNUNET_array_grow (peer->tunnels, peer->ntunnels, 0); + GNUNET_free (peer); return GNUNET_OK; } @@ -1431,12 +1788,12 @@ peer_info_destroy (struct MeshPeerInfo *pi) * TODO: optimize (see below) */ static void -peer_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1, +peer_remove_path (struct MeshPeer *peer, GNUNET_PEER_Id p1, GNUNET_PEER_Id p2) { struct MeshPeerPath *p; struct MeshPeerPath *next; - struct MeshPeerInfo *peer_d; + struct MeshPeer *peer_d; GNUNET_PEER_Id d; unsigned int destroyed; unsigned int i; @@ -1486,7 +1843,7 @@ peer_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1, * @param trusted Do we trust that this path is real? */ void -peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path, +peer_add_path (struct MeshPeer *peer_info, struct MeshPeerPath *path, int trusted) { struct MeshPeerPath *aux; @@ -1579,23 +1936,23 @@ peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path, * @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) +peer_add_path_to_origin (struct MeshPeer *peer_info, + struct MeshPeerPath *path, int trusted) { path_invert (path); - peer_info_add_path (peer_info, path, trusted); + peer_add_path (peer_info, path, trusted); } /** * Add a tunnel to the list of tunnels a peer participates in. * Update the tunnel's destination. - * + * * @param p Peer to add to. * @param t Tunnel to add. */ static void -peer_info_add_tunnel (struct MeshPeerInfo *p, struct MeshTunnel *t) +peer_add_tunnel (struct MeshPeer *p, struct MeshTunnel *t) { if (0 != t->dest) { @@ -1611,12 +1968,12 @@ peer_info_add_tunnel (struct MeshPeerInfo *p, struct MeshTunnel *t) /** * Remove a tunnel from the list of tunnels a peer participates in. * Free the tunnel's destination. - * + * * @param p Peer to clean. * @param t Tunnel to remove. */ static void -peer_info_remove_tunnel (struct MeshPeerInfo *p, struct MeshTunnel *t) +peer_remove_tunnel (struct MeshPeer *p, struct MeshTunnel *t) { unsigned int i; @@ -1660,10 +2017,6 @@ tunnel_poll (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** Polling!\n"); - msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_POLL); - msg.header.size = htons (sizeof (msg)); - msg.tid = htonl (t->id.tid); - msg.pid = htonl (fc->last_pid_sent); GNUNET_PEER_resolve (t->id.oid, &msg.oid); if (fc == &t->prev_fc) @@ -1681,6 +2034,22 @@ tunnel_poll (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) GNUNET_break (0); return; } + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** peer: %s!\n", + GNUNET_i2s(GNUNET_PEER_resolve2 (peer))); + if (0 == peer) + { + if (GNUNET_YES == t->destroy) + tunnel_destroy (t); + else + GNUNET_break (0); + + return; + } + msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_POLL); + msg.header.size = htons (sizeof (msg)); + msg.tid = htonl (t->id.tid); + msg.pid = htonl (peer_get_first_payload_pid (peer_get_short (peer), t)); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** pid (%u)!\n", ntohl (msg.pid)); send_prebuilt_message (&msg.header, peer, t); fc->poll_time = GNUNET_TIME_STD_BACKOFF (fc->poll_time); fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time, @@ -1790,27 +2159,17 @@ path_add_to_peers (struct MeshPeerPath *p, int confirmed) for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ; for (i++; i < p->length; i++) { - struct MeshPeerInfo *aux; + struct MeshPeer *aux; struct MeshPeerPath *copy; aux = peer_get_short (p->peers[i]); copy = path_duplicate (p); copy->length = i + 1; - peer_info_add_path (aux, copy, p->length < 3 ? GNUNET_NO : confirmed); + peer_add_path (aux, copy, p->length < 3 ? GNUNET_NO : confirmed); } } -/** - * Send keepalive packets for a peer - * - * @param cls Closure (tunnel for which to send the keepalive). - * @param tc Notification context. - */ -static void -path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc); - - /** * Search for a tunnel among the incoming tunnels * @@ -1837,13 +2196,18 @@ tunnel_get_incoming (MESH_TunnelNumber tid) static struct MeshTunnel * tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid) { + if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI)) + { + GNUNET_break_op (0); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "TID %X not a local tid\n", tid); + return NULL; + } if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV) { return tunnel_get_incoming (tid); } else { - GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI); return GNUNET_CONTAINER_multihashmap32_get (c->own_tunnels, tid); } } @@ -1886,9 +2250,31 @@ tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid) } +/** + * Change the tunnel state. + * + * @param t Tunnel whose ttate to change. + * @param state New state. + */ +static void +tunnel_change_state (struct MeshTunnel *t, enum MeshTunnelState state) +{ + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Tunnel %s[%X] state was %s\n", + GNUNET_i2s (GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid, + GNUNET_MESH_DEBUG_S2S (t->state)); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Tunnel %s[%X] state is now %s\n", + GNUNET_i2s (GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid, + GNUNET_MESH_DEBUG_S2S (state)); + t->state = state; +} + + + /** * 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. */ @@ -1952,10 +2338,11 @@ tunnel_use_path (struct MeshTunnel *t, struct MeshPeerPath *p) t->path = path_duplicate (p); if (0 == own_pos) { - if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task) - GNUNET_SCHEDULER_cancel (t->maintenance_task); - t->maintenance_task = GNUNET_SCHEDULER_add_delayed (refresh_path_time, - &path_refresh, t); + if (GNUNET_SCHEDULER_NO_TASK != t->fwd_maintenance_task) + GNUNET_SCHEDULER_cancel (t->fwd_maintenance_task); + t->fwd_maintenance_task = + GNUNET_SCHEDULER_add_delayed (refresh_path_time, + &tunnel_fwd_keepalive, t); } } @@ -1981,13 +2368,13 @@ tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1, // { // return; // } -// +// // 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; -// +// // msg.header.size = htons (sizeof (msg)); // msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN); // GNUNET_PEER_resolve (t->id.oid, &msg.oid); @@ -2001,90 +2388,55 @@ tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1, } -/** - * 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 is_fwd Set to GNUNET_YES for FWD ACK (dest->owner) - */ -static void -send_local_ack (struct MeshTunnel *t, - struct MeshClient *c, - int is_fwd) -{ - struct GNUNET_MESH_LocalAck msg; - - msg.header.size = htons (sizeof (msg)); - msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK); - msg.tunnel_id = htonl (is_fwd ? t->local_tid : t->local_tid_dest); - GNUNET_SERVER_notification_context_unicast (nc, - c->handle, - &msg.header, - GNUNET_NO); -} - -/** - * 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, GNUNET_PEER_Id 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_prebuilt_message (&msg.header, peer, t); -} - - /** * Send an end-to-end FWD ACK message for the most recent in-sequence payload. - * + * * @param t Tunnel this is about. + * @param fwd Is for FWD traffic? (ACK dest->owner) */ static void -tunnel_send_fwd_data_ack (struct MeshTunnel *t) +tunnel_send_data_ack (struct MeshTunnel *t, int fwd) { struct GNUNET_MESH_DataACK msg; + struct MeshTunnelReliability *rel; + struct MeshReliableMessage *copy; + GNUNET_PEER_Id hop; + uint64_t mask; + unsigned int delta; - msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK); - msg.header.size = htons (sizeof (msg)); - msg.tid = htonl (t->id.tid); - GNUNET_PEER_resolve (t->id.oid, &msg.oid); - msg.pid = htonl (t->prev_fc.last_pid_recv); - msg.futures = 0; // FIXME set bits of other newer messages received - - send_prebuilt_message (&msg.header, t->prev_hop, t); -} - - -/** - * Send an end-to-end BCK ACK message for the most recent in-sequence payload. - * - * @param t Tunnel this is about. - */ -static void -tunnel_send_bck_data_ack (struct MeshTunnel *t) -{ - struct GNUNET_MESH_DataACK msg; + rel = fwd ? t->bck_rel : t->fwd_rel; + hop = fwd ? t->prev_hop : t->next_hop; + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "send_data_ack for %u\n", + rel->mid_recv - 1); - msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK); + if (GNUNET_NO == t->reliable) + { + GNUNET_break_op (0); + return; + } + msg.header.type = htons (fwd ? GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK : + GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK); msg.header.size = htons (sizeof (msg)); msg.tid = htonl (t->id.tid); GNUNET_PEER_resolve (t->id.oid, &msg.oid); - msg.pid = htonl (t->next_fc.last_pid_recv); - msg.futures = 0; // FIXME set bits of other newer messages received + msg.mid = htonl (rel->mid_recv - 1); + msg.futures = 0; + for (copy = rel->head_recv; NULL != copy; copy = copy->next) + { + delta = copy->mid - rel->mid_recv; + if (63 < delta) + break; + mask = 0x1LL << delta; + msg.futures |= mask; + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + " setting bit for %u (delta %u) (%llX) -> %llX\n", + copy->mid, delta, mask, msg.futures); + } + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " final futures %llX\n", msg.futures); - send_prebuilt_message (&msg.header, t->next_hop, t); + send_prebuilt_message (&msg.header, hop, t); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_data_ack END\n"); } @@ -2095,171 +2447,118 @@ tunnel_send_bck_data_ack (struct MeshTunnel *t) * 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 void -tunnel_send_fwd_ack (struct MeshTunnel *t, uint16_t type) -{ - uint32_t ack; - - /* Is it after unicast retransmission? */ - switch (type) - { - case GNUNET_MESSAGE_TYPE_MESH_UNICAST: - 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 (GNUNET_YES == t->reliable && NULL != t->client) - tunnel_send_fwd_data_ack (t); - break; - case GNUNET_MESSAGE_TYPE_MESH_ACK: - if (NULL != t->owner && GNUNET_YES == t->reliable) - return; - case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK: - break; - case GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK: - tunnel_send_fwd_data_ack (t); - break; - case GNUNET_MESSAGE_TYPE_MESH_POLL: - case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK: - t->force_ack = GNUNET_YES; - break; - default: - GNUNET_break (0); - } - - /* Check if we need to transmit the ACK */ - if (NULL == t->owner && - t->queue_max > t->next_fc.queue_n * 4 && - GMC_is_pid_bigger(t->prev_fc.last_ack_sent, t->prev_fc.last_pid_recv) && - GNUNET_NO == t->force_ack) - { - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, buffer free\n"); - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - " t->qmax: %u, t->qn: %u\n", - t->queue_max, t->next_fc.queue_n); - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - " t->pid: %u, t->ack: %u\n", - t->prev_fc.last_pid_recv, t->prev_fc.last_ack_sent); - return; - } - - /* Ok, ACK might be necessary, what PID to ACK? */ - ack = t->prev_fc.last_pid_recv + t->queue_max - t->next_fc.queue_n; - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK %u\n", ack); - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - " last %u, qmax %u, q %u\n", - t->prev_fc.last_pid_recv, t->queue_max, t->next_fc.queue_n); - if (ack == t->prev_fc.last_ack_sent && GNUNET_NO == t->force_ack) - { - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not needed\n"); - return; - } - - t->prev_fc.last_ack_sent = ack; - if (NULL != t->owner) - send_local_ack (t, t->owner, GNUNET_YES); - else if (0 != t->prev_hop) - send_ack (t, t->prev_hop, ack); - else - GNUNET_break (0); - debug_fwd_ack++; - t->force_ack = GNUNET_NO; -} - - -/** - * Send an ACK informing the children node/client 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. + * @param fwd Is this FWD ACK? (Going dest->owner) */ static void -tunnel_send_bck_ack (struct MeshTunnel *t, uint16_t type) +tunnel_send_ack (struct MeshTunnel *t, uint16_t type, int fwd) { + struct MeshTunnelReliability *rel; + struct MeshFlowControl *next_fc; + struct MeshFlowControl *prev_fc; + struct MeshClient *c; + struct MeshClient *o; + GNUNET_PEER_Id hop; + uint32_t delta_mid; uint32_t ack; - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "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? */ + int delta; + + rel = fwd ? t->fwd_rel : t->bck_rel; + c = fwd ? t->client : t->owner; + o = fwd ? t->owner : t->client; + next_fc = fwd ? &t->next_fc : &t->prev_fc; + prev_fc = fwd ? &t->prev_fc : &t->next_fc; + hop = fwd ? t->prev_hop : t->next_hop; + switch (type) { + case GNUNET_MESSAGE_TYPE_MESH_UNICAST: case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN: - if (GNUNET_YES == t->nobuffer) + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "ACK due to %s\n", + GNUNET_MESH_DEBUG_M2S (type)); + if (GNUNET_YES == t->nobuffer && (GNUNET_NO == t->reliable || NULL == c)) { - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - " Not sending ACK, nobuffer + traffic\n"); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n"); return; } + if (GNUNET_YES == t->reliable && NULL != c) + tunnel_send_data_ack (t, fwd); break; + case GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK: + case GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK: case GNUNET_MESSAGE_TYPE_MESH_ACK: - /* Why was this here?! - * This prevents the destination from starting traffic to the origin - */ -// if (NULL != t->client && GNUNET_YES == t->reliable) -// return; case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK: break; - case GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK: - tunnel_send_bck_data_ack (t); - /* fall through */ - case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK: case GNUNET_MESSAGE_TYPE_MESH_POLL: + case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK: t->force_ack = GNUNET_YES; break; default: GNUNET_break (0); } - /* TODO: Check if we need to transmit the ACK (as in fwd) */ - - ack = t->next_fc.last_pid_recv + t->queue_max - t->prev_fc.queue_n; - - if (t->next_fc.last_ack_sent == ack && GNUNET_NO == t->force_ack) + /* Check if we need to transmit the ACK */ + if (NULL == o && + prev_fc->last_ack_sent - prev_fc->last_pid_recv > 3 && + GNUNET_NO == t->force_ack) { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n"); GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - " Not sending ACK, not needed, last ack sent was %u\n", - t->next_fc.last_ack_sent); + " last pid recv: %u, last ack sent: %u\n", + prev_fc->last_pid_recv, prev_fc->last_ack_sent); return; } + + /* Ok, ACK might be necessary, what PID to ACK? */ + delta = t->queue_max - next_fc->queue_n; + if (NULL != o && GNUNET_YES == t->reliable && NULL != rel->head_sent) + delta_mid = rel->mid_sent - rel->head_sent->mid; + else + delta_mid = 0; + if (0 > delta || (GNUNET_YES == t->reliable && + NULL != o && + (10 < rel->n_sent || 64 <= delta_mid))) + delta = 0; + if (NULL != o && delta > 1) + delta = 1; + ack = prev_fc->last_pid_recv + delta; + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack); GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - " Sending BCK ACK %u (last sent: %u)\n", - ack, t->next_fc.last_ack_sent); - t->next_fc.last_ack_sent = ack; + " last pid %u, last ack %u, qmax %u, q %u\n", + prev_fc->last_pid_recv, prev_fc->last_ack_sent, + t->queue_max, next_fc->queue_n); + if (ack == prev_fc->last_ack_sent && GNUNET_NO == t->force_ack) + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not needed\n"); + return; + } - if (NULL != t->client) - send_local_ack (t, t->client, GNUNET_NO); - else if (0 != t->next_hop) - send_ack (t, t->next_hop, ack); + prev_fc->last_ack_sent = ack; + if (NULL != o) + send_local_ack (t, o, fwd); + else if (0 != hop) + send_ack (t, hop, ack); else - GNUNET_break (0); + GNUNET_break (GNUNET_YES == t->destroy); t->force_ack = GNUNET_NO; } /** * Modify the mesh message TID from global to local and send to client. - * + * * @param t Tunnel on which to send the message. * @param msg Message to modify and send. * @param c Client to send to. * @param tid Tunnel ID to use (c can be both owner and client). */ static void -tunnel_send_client_data (struct MeshTunnel *t, - const struct GNUNET_MESH_Data *msg, - struct MeshClient *c, MESH_TunnelNumber tid) +tunnel_send_client_to_tid (struct MeshTunnel *t, + const struct GNUNET_MESH_Data *msg, + struct MeshClient *c, MESH_TunnelNumber tid) { struct GNUNET_MESH_LocalData *copy; uint16_t size = ntohs (msg->header.size) - sizeof (struct GNUNET_MESH_Data); @@ -2286,29 +2585,250 @@ tunnel_send_client_data (struct MeshTunnel *t, /** * Modify the unicast message TID from global to local and send to client. - * + * * @param t Tunnel on which to send the message. * @param msg Message to modify and send. + * @param fwd Forward? */ static void -tunnel_send_client_ucast (struct MeshTunnel *t, - const struct GNUNET_MESH_Data *msg) +tunnel_send_client_data (struct MeshTunnel *t, + const struct GNUNET_MESH_Data *msg, + int fwd) { - tunnel_send_client_data (t, msg, t->client, t->local_tid_dest); + if (fwd) + tunnel_send_client_to_tid (t, msg, t->client, t->local_tid_dest); + else + tunnel_send_client_to_tid (t, msg, t->owner, t->local_tid); } /** - * Modify the to_origin message TID from global to local and send to client. - * - * @param t Tunnel on which to send the message. - * @param msg Message to modify and send. + * Send up to 64 buffered messages to the client for in order delivery. + * + * @param t Tunnel on which to empty the message buffer. + * @param c Client to send to. + * @param rel Reliability structure to corresponding peer. + * If rel == t->bck_rel, this is FWD data. + */ +static void +tunnel_send_client_buffered_data (struct MeshTunnel *t, struct MeshClient *c, + struct MeshTunnelReliability *rel) +{ + ; + struct MeshReliableMessage *copy; + struct MeshReliableMessage *next; + + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_buffered_data\n"); + for (copy = rel->head_recv; NULL != copy; copy = next) + { + next = copy->next; + if (copy->mid == rel->mid_recv) + { + struct GNUNET_MESH_Data *msg = (struct GNUNET_MESH_Data *) ©[1]; + + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + " have %u! now expecting %u\n", + copy->mid, rel->mid_recv + 1); + tunnel_send_client_data (t, msg, (rel == t->bck_rel)); + rel->mid_recv++; + GNUNET_CONTAINER_DLL_remove (rel->head_recv, rel->tail_recv, copy); + GNUNET_free (copy); + } + else + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + " don't have %u, next is %u\n", + rel->mid_recv, + copy->mid); + return; + } + } + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_buffered_data END\n"); +} + + +/** + * We have received a message out of order, buffer it until we receive + * the missing one and we can feed the rest to the client. + * + * @param t Tunnel to add to. + * @param msg Message to buffer. + * @param rel Reliability data to the corresponding direction. + */ +static void +tunnel_add_buffered_data (struct MeshTunnel *t, + const struct GNUNET_MESH_Data *msg, + struct MeshTunnelReliability *rel) +{ + struct MeshReliableMessage *copy; + struct MeshReliableMessage *prev; + uint32_t mid; + uint16_t size; + + size = ntohs (msg->header.size); + mid = ntohl (msg->mid); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "add_buffered_data %u\n", mid); + + copy = GNUNET_malloc (sizeof (*copy) + size); + copy->mid = mid; + copy->rel = rel; + memcpy (©[1], msg, size); + + // FIXME do something better than O(n), although n < 64... + // FIXME start from the end (most messages are the latest ones) + for (prev = rel->head_recv; NULL != prev; prev = prev->next) + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " prev %u\n", prev->mid); + if (GMC_is_pid_bigger (prev->mid, mid)) + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " bingo!\n"); + GNUNET_CONTAINER_DLL_insert_before (rel->head_recv, rel->tail_recv, + prev, copy); + return; + } + } + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " insert at tail!\n"); + GNUNET_CONTAINER_DLL_insert_tail (rel->head_recv, rel->tail_recv, copy); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "add_buffered_data END\n"); +} + + +/** + * Destroy a reliable message after it has been acknowledged, either by + * direct mid ACK or bitfield. Updates the appropriate data structures and + * timers and frees all memory. + * + * @param copy Message that is no longer needed: remote peer got it. + */ +static void +tunnel_free_reliable_message (struct MeshReliableMessage *copy) +{ + struct MeshTunnelReliability *rel; + struct GNUNET_TIME_Relative time; + + rel = copy->rel; + time = GNUNET_TIME_absolute_get_duration (copy->timestamp); + rel->expected_delay.rel_value_us *= 7; + rel->expected_delay.rel_value_us += time.rel_value_us; + rel->expected_delay.rel_value_us /= 8; + rel->n_sent--; + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Freeing %u\n", copy->mid); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " n_sent %u\n", rel->n_sent); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! took %s\n", + GNUNET_STRINGS_relative_time_to_string (time, GNUNET_NO)); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! new expected delay %s\n", + GNUNET_STRINGS_relative_time_to_string (rel->expected_delay, + GNUNET_NO)); + rel->retry_timer = rel->expected_delay; + GNUNET_CONTAINER_DLL_remove (rel->head_sent, rel->tail_sent, copy); + GNUNET_free (copy); +} + + +/** + * Destroy all reliable messages queued for a tunnel, + * during a tunnel destruction. + * Frees the reliability structure itself. + * + * @param rel Reliability data for a tunnel. + */ +static void +tunnel_free_reliable_all (struct MeshTunnelReliability *rel) +{ + struct MeshReliableMessage *copy; + struct MeshReliableMessage *next; + + if (NULL == rel) + return; + + for (copy = rel->head_recv; NULL != copy; copy = next) + { + next = copy->next; + GNUNET_CONTAINER_DLL_remove (rel->head_recv, rel->tail_recv, copy); + GNUNET_free (copy); + } + for (copy = rel->head_sent; NULL != copy; copy = next) + { + next = copy->next; + GNUNET_CONTAINER_DLL_remove (rel->head_sent, rel->tail_sent, copy); + GNUNET_free (copy); + } + if (GNUNET_SCHEDULER_NO_TASK != rel->retry_task) + GNUNET_SCHEDULER_cancel (rel->retry_task); + GNUNET_free (rel); +} + + +/** + * Mark future messages as ACK'd. + * + * @param t Tunnel whose sent buffer to clean. + * @param msg DataACK message with a bitfield of future ACK'd messages. + * @param rel Reliability data. */ static void -tunnel_send_client_to_orig (struct MeshTunnel *t, - const struct GNUNET_MESH_Data *msg) +tunnel_free_sent_reliable (struct MeshTunnel *t, + const struct GNUNET_MESH_DataACK *msg, + struct MeshTunnelReliability *rel) { - tunnel_send_client_data (t, msg, t->owner, t->local_tid); + struct MeshReliableMessage *copy; + struct MeshReliableMessage *next; + uint64_t bitfield; + uint64_t mask; + uint32_t mid; + uint32_t target; + unsigned int i; + + bitfield = msg->futures; + mid = ntohl (msg->mid); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "free_sent_reliable %u %llX\n", + mid, bitfield); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + " rel %p, head %p\n", + rel, rel->head_sent); + for (i = 0, copy = rel->head_sent; + i < 64 && NULL != copy && 0 != bitfield; + i++) + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + " trying bit %u (mid %u)\n", + i, mid + i + 1); + mask = 0x1LL << i; + if (0 == (bitfield & mask)) + continue; + + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " set!\n"); + /* Bit was set, clear the bit from the bitfield */ + bitfield &= ~mask; + + /* The i-th bit was set. Do we have that copy? */ + /* Skip copies with mid < target */ + target = mid + i + 1; + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " target %u\n", target); + while (NULL != copy && GMC_is_pid_bigger (target, copy->mid)) + copy = copy->next; + + /* Did we run out of copies? (previously freed, it's ok) */ + if (NULL == copy) + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "run out of copies...\n"); + return; + } + + /* Did we overshoot the target? (previously freed, it's ok) */ + if (GMC_is_pid_bigger (copy->mid, target)) + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " next copy %u\n", copy->mid); + continue; + } + + /* Now copy->mid == target, free it */ + next = copy->next; + tunnel_free_reliable_message (copy); + copy = next; + } + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "free_sent_reliable END\n"); } @@ -2324,6 +2844,9 @@ tunnel_retransmit_message (void *cls, { struct MeshTunnelReliability *rel = cls; struct MeshReliableMessage *copy; + struct MeshFlowControl *fc; + struct MeshPeerQueue *q; + struct MeshPeer *pi; struct MeshTunnel *t; struct GNUNET_MESH_Data *payload; GNUNET_PEER_Id hop; @@ -2334,62 +2857,163 @@ tunnel_retransmit_message (void *cls, t = rel->t; copy = rel->head_sent; - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! RETRANSMIT %u\n", copy->id); + if (NULL == copy) + { + GNUNET_break (0); + return; + } + /* Search the message to be retransmitted in the outgoing queue */ payload = (struct GNUNET_MESH_Data *) ©[1]; hop = rel == t->fwd_rel ? t->next_hop : t->prev_hop; - send_prebuilt_message (&payload->header, hop, t); - GNUNET_STATISTICS_update (stats, "# data retransmitted", 1, GNUNET_NO); - rel->retry_timer = GNUNET_TIME_STD_BACKOFF (rel->retry_timer); // FIXME adapt + fc = rel == t->fwd_rel ? &t->prev_fc : &t->next_fc; + pi = peer_get_short (hop); + for (q = pi->queue_head; NULL != q; q = q->next) + { + if (ntohs (payload->header.type) == q->type) + { + struct GNUNET_MESH_Data *queued_data = q->cls; + + if (queued_data->mid == payload->mid) + break; + } + } + + /* Message not found in the queue */ + if (NULL == q) + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! RETRANSMIT %u\n", copy->mid); + + fc->last_ack_sent++; + fc->last_pid_recv++; + payload->pid = htonl (fc->last_pid_recv); + send_prebuilt_message (&payload->header, hop, t); + GNUNET_STATISTICS_update (stats, "# data retransmitted", 1, GNUNET_NO); + } + else + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! STILL IN QUEUE %u\n", copy->mid); + } + + rel->retry_timer = GNUNET_TIME_STD_BACKOFF (rel->retry_timer); rel->retry_task = GNUNET_SCHEDULER_add_delayed (rel->retry_timer, - &tunnel_retransmit_message, - cls); + &tunnel_retransmit_message, + cls); } /** - * @brief Re-initiate traffic to this peer if necessary. + * Send keepalive packets for a tunnel. * - * Check if there is traffic queued towards this peer - * and the core transmit handle is NULL (traffic was stalled). - * If so, call core tmt rdy. + * @param t Tunnel to keep alive.. + * @param fwd Is this a FWD keepalive? (owner -> dest). + */ +static void +tunnel_keepalive (struct MeshTunnel *t, int fwd) +{ + struct GNUNET_MESH_TunnelKeepAlive *msg; + size_t size = sizeof (struct GNUNET_MESH_TunnelKeepAlive); + char cbuf[size]; + GNUNET_PEER_Id hop; + uint16_t type; + + type = fwd ? GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE : + GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE; + hop = fwd ? t->next_hop : t->prev_hop; + + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "sending %s keepalive for tunnel %d\n", + fwd ? "FWD" : "BCK", t->id.tid); + + msg = (struct GNUNET_MESH_TunnelKeepAlive *) cbuf; + msg->header.size = htons (size); + msg->header.type = htons (type); + msg->oid = *(GNUNET_PEER_resolve2 (t->id.oid)); + msg->tid = htonl (t->id.tid); + send_prebuilt_message (&msg->header, hop, t); +} + + +/** + * Send create (PATH_CREATE/PATH_ACK) packets for a tunnel. * - * @param peer_id Short ID of peer to which initiate traffic. + * @param t Tunnel for which to send the message. + * @param fwd If GNUNET_YES, send CREATE, otherwise send ACK. */ static void -peer_unlock_queue(GNUNET_PEER_Id peer_id) +tunnel_recreate (struct MeshTunnel *t, int fwd) { - struct MeshPeerInfo *peer; - struct GNUNET_PeerIdentity id; - struct MeshPeerQueue *q; - size_t size; + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "sending path recreate for tunnel %s[%X]\n", + GNUNET_i2s (GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid); + if (fwd) + send_path_create (t); + else + send_path_ack (t); +} - peer = peer_get_short (peer_id); - if (NULL != peer->core_transmit) - return; - q = queue_get_next (peer); - if (NULL == q) +/** + * Generic tunnel timer management. + * Depending on the role of the peer in the tunnel will send the + * appropriate message (build or keepalive) + * + * @param t Tunnel to maintain. + * @param fwd Is FWD? + */ +static void +tunnel_maintain (struct MeshTunnel *t, int fwd) +{ + switch (t->state) { - /* Might br multicast traffic already sent to this particular peer but - * not to other children in this tunnel. - * This way t->queue_n would be > 0 but the queue of this particular peer - * would be empty. - */ - return; + case MESH_TUNNEL_NEW: + GNUNET_break (0); + case MESH_TUNNEL_SEARCHING: + /* TODO DHT GET with RO_BART */ + break; + case MESH_TUNNEL_WAITING: + tunnel_recreate (t, fwd); + break; + case MESH_TUNNEL_READY: + tunnel_keepalive (t, fwd); + break; + default: + break; } - size = q->size; - GNUNET_PEER_resolve (peer->id, &id); - peer->core_transmit = - GNUNET_CORE_notify_transmit_ready(core_handle, - 0, - 0, - GNUNET_TIME_UNIT_FOREVER_REL, - &id, - size, - &queue_send, - peer); - return; +} + + +static void +tunnel_fwd_keepalive (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) +{ + struct MeshTunnel *t = cls; + + t->fwd_maintenance_task = GNUNET_SCHEDULER_NO_TASK; + if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) || + NULL == t->owner) + return; + + tunnel_maintain (t, GNUNET_YES); + t->fwd_maintenance_task = GNUNET_SCHEDULER_add_delayed (refresh_path_time, + &tunnel_fwd_keepalive, + t); +} + + +static void +tunnel_bck_keepalive (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) +{ + struct MeshTunnel *t = cls; + + t->bck_maintenance_task = GNUNET_SCHEDULER_NO_TASK; + if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) || + NULL == t->client) + return; + + tunnel_keepalive (t, GNUNET_NO); + t->bck_maintenance_task = GNUNET_SCHEDULER_add_delayed (refresh_path_time, + &tunnel_bck_keepalive, + t); } @@ -2420,81 +3044,28 @@ tunnel_send_destroy (struct MeshTunnel *t) GNUNET_PEER_resolve (t->next_hop, &id); GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending forward to %s\n", - GNUNET_i2s (&id)); - send_prebuilt_message (&msg.header, t->next_hop, t); - } - if (NULL == t->owner && 0 != t->prev_hop) - { - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " parent: %u\n", t->prev_hop); - GNUNET_PEER_resolve (t->prev_hop, &id); - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - " sending back to %s\n", - GNUNET_i2s (&id)); - send_prebuilt_message (&msg.header, t->prev_hop, t); - } - if (NULL != t->owner) - { - send_client_tunnel_destroy (t->owner, t); - } - if (NULL != t->client) - { - send_client_tunnel_destroy (t->client, t); - } -} - - -/** - * Cancel all transmissions towards a neighbor that belongs to a certain tunnel. - * - * @param t Tunnel which to cancel. - * @param neighbor Short ID of the neighbor to whom cancel the transmissions. - */ -static void -peer_cancel_queues (GNUNET_PEER_Id neighbor, struct MeshTunnel *t) -{ - struct MeshPeerInfo *peer_info; - struct MeshPeerQueue *pq; - struct MeshPeerQueue *next; - - if (0 == neighbor) - return; /* Was local peer, 0'ed in tunnel_destroy_iterator */ - peer_info = peer_get_short (neighbor); - for (pq = peer_info->queue_head; NULL != pq; pq = next) + GNUNET_i2s (&id)); + send_prebuilt_message (&msg.header, t->next_hop, t); + } + if (NULL == t->owner && 0 != t->prev_hop) { - next = pq->next; - if (pq->tunnel == t) - { - if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == pq->type || - GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == pq->type) - { - /* Should have been removed on destroy children */ - GNUNET_break (0); - } - queue_destroy (pq, GNUNET_YES); - } + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " parent: %u\n", t->prev_hop); + GNUNET_PEER_resolve (t->prev_hop, &id); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + " sending back to %s\n", + GNUNET_i2s (&id)); + send_prebuilt_message (&msg.header, t->prev_hop, t); + } + if (NULL != t->owner) + { + send_local_tunnel_destroy (t, GNUNET_NO); } - if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit) + if (NULL != t->client) { - GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit); - peer_info->core_transmit = NULL; + send_local_tunnel_destroy (t, GNUNET_YES); } } - -/** - * Destroy the tunnel. - * - * This function does not generate any warning traffic to clients or peers. - * - * Tasks: - * Remove the tunnel from peer_info's and clients' hashmaps. - * Cancel messages belonging to this tunnel queued to neighbors. - * Free any allocated resources linked to the tunnel. - * - * @param t the tunnel to destroy - * - * @return GNUNET_OK on success - */ static int tunnel_destroy (struct MeshTunnel *t) { @@ -2507,17 +3078,11 @@ tunnel_destroy (struct MeshTunnel *t) r = GNUNET_OK; c = t->owner; -#if MESH_DEBUG - { - struct GNUNET_PeerIdentity id; - GNUNET_PEER_resolve (t->id.oid, &id); - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n", - GNUNET_i2s (&id), t->id.tid); - if (NULL != c) - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id); - } -#endif + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n", + GNUNET_i2s (GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid); + if (NULL != c) + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id); GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash); if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t)) @@ -2528,17 +3093,17 @@ tunnel_destroy (struct MeshTunnel *t) if (NULL != c) { - if (GNUNET_YES != - GNUNET_CONTAINER_multihashmap32_remove (c->own_tunnels, t->local_tid, t)) + if (GNUNET_YES != GNUNET_CONTAINER_multihashmap32_remove (c->own_tunnels, + t->local_tid, t)) { GNUNET_break (0); r = GNUNET_SYSERR; } } - if (NULL != t->client) + c = t->client; + if (NULL != c) { - c = t->client; if (GNUNET_YES != GNUNET_CONTAINER_multihashmap32_remove (c->incoming_tunnels, t->local_tid_dest, t)) @@ -2546,7 +3111,7 @@ tunnel_destroy (struct MeshTunnel *t) GNUNET_break (0); r = GNUNET_SYSERR; } - if (GNUNET_YES != + if (GNUNET_YES != GNUNET_CONTAINER_multihashmap32_remove (incoming_tunnels, t->local_tid_dest, t)) { @@ -2555,6 +3120,11 @@ tunnel_destroy (struct MeshTunnel *t) } } + if(GNUNET_YES == t->reliable) + { + tunnel_free_reliable_all (t->fwd_rel); + tunnel_free_reliable_all (t->bck_rel); + } if (0 != t->prev_hop) { peer_cancel_queues (t->prev_hop, t); @@ -2565,12 +3135,24 @@ tunnel_destroy (struct MeshTunnel *t) peer_cancel_queues (t->next_hop, t); GNUNET_PEER_change_rc (t->next_hop, -1); } + if (GNUNET_SCHEDULER_NO_TASK != t->next_fc.poll_task) + { + GNUNET_SCHEDULER_cancel (t->next_fc.poll_task); + t->next_fc.poll_task = GNUNET_SCHEDULER_NO_TASK; + } + if (GNUNET_SCHEDULER_NO_TASK != t->prev_fc.poll_task) + { + GNUNET_SCHEDULER_cancel (t->prev_fc.poll_task); + t->prev_fc.poll_task = GNUNET_SCHEDULER_NO_TASK; + } if (0 != t->dest) { - peer_info_remove_tunnel (peer_get_short (t->dest), t); + peer_remove_tunnel (peer_get_short (t->dest), t); } - if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task) - GNUNET_SCHEDULER_cancel (t->maintenance_task); + if (GNUNET_SCHEDULER_NO_TASK != t->fwd_maintenance_task) + GNUNET_SCHEDULER_cancel (t->fwd_maintenance_task); + if (GNUNET_SCHEDULER_NO_TASK != t->bck_maintenance_task) + GNUNET_SCHEDULER_cancel (t->bck_maintenance_task); n_tunnels--; GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO); @@ -2581,10 +3163,10 @@ tunnel_destroy (struct MeshTunnel *t) /** * Tunnel is empty: destroy it. - * + * * Notifies all participants (peers, cleints) about the destruction. - * - * @param t Tunnel to destroy. + * + * @param t Tunnel to destroy. */ static void tunnel_destroy_empty (struct MeshTunnel *t) @@ -2610,7 +3192,7 @@ tunnel_destroy_empty (struct MeshTunnel *t) /** * Initialize a Flow Control structure to the initial state. - * + * * @param fc Flow Control structure to initialize. */ static void @@ -2627,12 +3209,12 @@ fc_init (struct MeshFlowControl *fc) /** * 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 * @@ -2654,6 +3236,8 @@ tunnel_new (GNUNET_PEER_Id owner, t->owner = client; fc_init (&t->next_fc); fc_init (&t->prev_fc); + t->next_fc.t = t; + t->prev_fc.t = t; t->local_tid = local; n_tunnels++; GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO); @@ -2693,7 +3277,7 @@ tunnel_new (GNUNET_PEER_Id owner, /** * Set options in a tunnel, extracted from a bit flag field - * + * * @param t Tunnel to set options to. * @param options Bit array in host byte order. */ @@ -2754,143 +3338,125 @@ tunnel_destroy_iterator (void *cls, /** - * Timeout function, destroys tunnel if called + * remove client's ports from the global hashmap on diconnect. + * + * @param cls Closure (unused). + * @param key Port. + * @param value ThClient structure. + * + * @return GNUNET_OK, keep iterating. + */ +static int +client_release_ports (void *cls, + uint32_t key, + void *value) +{ + int res; + + res = GNUNET_CONTAINER_multihashmap32_remove (ports, key, value); + if (GNUNET_YES != res) + { + GNUNET_break (0); + GNUNET_log (GNUNET_ERROR_TYPE_WARNING, + "Port %u by client %p was not registered.\n", + key, value); + } + return GNUNET_OK; +} + +/** + * Timeout function due to lack of keepalive/traffic from the owner. + * Destroys tunnel if called. * * @param cls Closure (tunnel to destroy). * @param tc TaskContext */ static void -tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) +tunnel_fwd_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) { struct MeshTunnel *t = cls; - struct GNUNET_PeerIdentity id; - t->maintenance_task = GNUNET_SCHEDULER_NO_TASK; + t->fwd_maintenance_task = GNUNET_SCHEDULER_NO_TASK; if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN)) return; - GNUNET_PEER_resolve(t->id.oid, &id); - GNUNET_log (GNUNET_ERROR_TYPE_INFO, - "Tunnel %s [%X] timed out. Destroying.\n", - GNUNET_i2s(&id), t->id.tid); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Tunnel %s [%X] FWD timed out. Destroying.\n", + GNUNET_i2s(GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid); if (NULL != t->client) - send_client_tunnel_destroy (t->client, t); + send_local_tunnel_destroy (t, GNUNET_YES); tunnel_destroy (t); /* Do not notify other */ } /** - * Resets the tunnel timeout. Starts it if no timeout was running. - * - * @param t Tunnel whose timeout to reset. + * Timeout function due to lack of keepalive/traffic from the destination. + * Destroys tunnel if called. * - * TODO use heap to improve efficiency of scheduler. + * @param cls Closure (tunnel to destroy). + * @param tc TaskContext */ static void -tunnel_reset_timeout (struct MeshTunnel *t) +tunnel_bck_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) { - if (NULL != t->owner || 0 != t->local_tid || 0 == t->prev_hop) + struct MeshTunnel *t = cls; + + t->bck_maintenance_task = GNUNET_SCHEDULER_NO_TASK; + if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN)) return; - if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task) - GNUNET_SCHEDULER_cancel (t->maintenance_task); - t->maintenance_task = - GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply - (refresh_path_time, 4), &tunnel_timeout, t); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Tunnel %s [%X] BCK timed out. Destroying.\n", + GNUNET_i2s(GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid); + if (NULL != t->owner) + send_local_tunnel_destroy (t, GNUNET_NO); + tunnel_destroy (t); /* Do not notify other */ } -/******************************************************************************/ -/**************** MESH NETWORK HANDLER HELPERS ***********************/ -/******************************************************************************/ - /** - * Function to send a create path packet to a peer. + * Resets the tunnel timeout task, some other message has done the task's job. + * - For the first peer on the direction this means to send + * a keepalive or a path confirmation message (either create or ACK). + * - For all other peers, this means to destroy the tunnel, + * due to lack of activity. + * Starts the tiemout if no timeout was running (tunnel just created). * - * @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 t Tunnel whose timeout to reset. + * @param fwd Is this forward? + * + * TODO use heap to improve efficiency of scheduler. */ -static size_t -send_core_path_create (void *cls, size_t size, void *buf) +static void +tunnel_reset_timeout (struct MeshTunnel *t, int fwd) { - struct MeshTunnel *t = cls; - struct GNUNET_MESH_CreateTunnel *msg; - struct GNUNET_PeerIdentity *peer_ptr; - struct MeshPeerPath *p = t->path; - size_t size_needed; - uint32_t opt; - int i; - - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n"); - size_needed = - sizeof (struct GNUNET_MESH_CreateTunnel) + - p->length * sizeof (struct GNUNET_PeerIdentity); + GNUNET_SCHEDULER_TaskIdentifier *ti; + GNUNET_SCHEDULER_Task f; + struct MeshClient *c; - if (size < size_needed || NULL == buf) - { - GNUNET_break (0); - return 0; - } - msg = (struct GNUNET_MESH_CreateTunnel *) buf; - msg->header.size = htons (size_needed); - msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE); - msg->tid = ntohl (t->id.tid); + ti = fwd ? &t->fwd_maintenance_task : &t->bck_maintenance_task; + c = fwd ? t->owner : t->client; - opt = 0; - if (GNUNET_YES == t->nobuffer) - opt |= GNUNET_MESH_OPTION_NOBUFFER; - if (GNUNET_YES == t->reliable) - opt |= GNUNET_MESH_OPTION_RELIABLE; - msg->opt = htonl (opt); - msg->port = htonl (t->port); + if (GNUNET_SCHEDULER_NO_TASK != *ti) + GNUNET_SCHEDULER_cancel (*ti); - peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1]; - for (i = 0; i < p->length; i++) + if (NULL != c) { - GNUNET_PEER_resolve (p->peers[i], peer_ptr++); + f = fwd ? &tunnel_fwd_keepalive : &tunnel_bck_keepalive; + *ti = GNUNET_SCHEDULER_add_delayed (refresh_path_time, f, t); } - - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "CREATE PATH (%u bytes long) sent!\n", size_needed); - return size_needed; -} - - -/** - * 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 MeshTunnel *t = cls; - struct GNUNET_MESH_PathACK *msg = buf; - - GNUNET_assert (NULL != t); - if (sizeof (struct GNUNET_MESH_PathACK) > size) + else { - GNUNET_break (0); - return 0; + f = fwd ? &tunnel_fwd_timeout : &tunnel_bck_timeout; + *ti = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply + (refresh_path_time, 4), + f, t); } - t->prev_fc.last_ack_sent = t->nobuffer ? 0 : t->queue_max - 1; - msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK)); - msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK); - GNUNET_PEER_resolve (t->id.oid, &msg->oid); - msg->tid = htonl (t->id.tid); - msg->peer_id = my_full_id; - msg->ack = htonl (t->prev_fc.last_ack_sent); - - /* TODO add signature */ - - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n"); - return sizeof (struct GNUNET_MESH_PathACK); } +/******************************************************************************/ +/**************** MESH NETWORK HANDLER HELPERS ***********************/ +/******************************************************************************/ + /** * Free a transmission that was already queued with all resources * associated to the request. @@ -2914,8 +3480,11 @@ queue_destroy (struct MeshPeerQueue *queue, int clear_cls) case GNUNET_MESSAGE_TYPE_MESH_UNICAST: case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN: case GNUNET_MESSAGE_TYPE_MESH_ACK: + case GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK: + case GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK: case GNUNET_MESSAGE_TYPE_MESH_POLL: - case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE: + case GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE: + case GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE: GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " prebuilt message\n"); GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, @@ -2969,7 +3538,7 @@ queue_destroy (struct MeshPeerQueue *queue, int clear_cls) * NULL when there are no transmittable messages. */ struct MeshPeerQueue * -queue_get_next (const struct MeshPeerInfo *peer) +queue_get_next (const struct MeshPeer *peer) { struct MeshPeerQueue *q; @@ -3001,8 +3570,8 @@ queue_get_next (const struct MeshPeerInfo *peer) return q; } GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "* ACK: %u, PID: %u\n", - ack, pid); + "* ACK: %u, PID: %u, MID: %u\n", + ack, pid, ntohl (dmsg->mid)); if (GNUNET_NO == GMC_is_pid_bigger (pid, ack)) { GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, @@ -3024,7 +3593,7 @@ queue_get_next (const struct MeshPeerInfo *peer) static size_t queue_send (void *cls, size_t size, void *buf) { - struct MeshPeerInfo *peer = cls; + struct MeshPeer *peer = cls; struct GNUNET_MessageHeader *msg; struct MeshPeerQueue *queue; struct MeshTunnel *t; @@ -3037,6 +3606,12 @@ queue_send (void *cls, size_t size, void *buf) peer->core_transmit = NULL; GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Queue send\n"); + + if (NULL == buf || 0 == size) + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Buffer size 0.\n"); + return 0; + } queue = queue_get_next (peer); /* Queue has no internal mesh traffic nor sendable payload */ @@ -3047,6 +3622,7 @@ queue_send (void *cls, size_t size, void *buf) GNUNET_break (0); /* Core tmt_rdy should've been canceled */ return 0; } + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not empty\n"); GNUNET_PEER_resolve (peer->id, &dst_id); @@ -3087,7 +3663,8 @@ queue_send (void *cls, size_t size, void *buf) case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN: case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY: case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY: - case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE: + case GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE: + case GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE: GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* raw: %s\n", GNUNET_MESH_DEBUG_M2S (queue->type)); @@ -3131,64 +3708,80 @@ queue_send (void *cls, size_t size, void *buf) switch (type) { case GNUNET_MESSAGE_TYPE_MESH_UNICAST: - if (GMC_is_pid_bigger(pid, t->next_fc.last_pid_sent)) - t->next_fc.last_pid_sent = pid; - tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST); + t->next_fc.last_pid_sent = pid; + tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST, GNUNET_YES); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "!!! FWD %u\n", + ntohl ( ((struct GNUNET_MESH_Data *) buf)->mid ) ); break; case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN: - if (GMC_is_pid_bigger(pid, t->prev_fc.last_pid_sent)) - t->prev_fc.last_pid_sent = pid; - tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN); + t->prev_fc.last_pid_sent = pid; + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "!!! BCK %u\n", + ntohl ( ((struct GNUNET_MESH_Data *) buf)->mid ) ); + tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, GNUNET_NO); break; default: break; } - if (GNUNET_YES == t->destroy && 0 == t->pending_messages) - { - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* destroying tunnel!\n"); - tunnel_destroy (t); - } - /* If more data in queue, send next */ queue = queue_get_next (peer); if (NULL != queue) { - 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, - queue->size, - &queue_send, - peer); - } - else if (NULL != peer->queue_head) - { - GNUNET_log (GNUNET_ERROR_TYPE_INFO, - "* %s stalled\n", - GNUNET_i2s (&my_full_id)); - if (peer->id == t->next_hop) - fc = &t->next_fc; - else if (peer->id == t->prev_hop) - fc = &t->prev_fc; - else - { - GNUNET_break (0); - fc = NULL; - } - if (NULL != fc && GNUNET_SCHEDULER_NO_TASK == fc->poll_task) + if (NULL == peer->core_transmit) { + peer->core_transmit = + GNUNET_CORE_notify_transmit_ready(core_handle, + 0, + 0, + GNUNET_TIME_UNIT_FOREVER_REL, + &dst_id, + queue->size, + &queue_send, + peer); + } + else + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "* tmt rdy called somewhere else\n"); + } + } + if (peer->id == t->next_hop) + fc = &t->next_fc; + else if (peer->id == t->prev_hop) + fc = &t->prev_fc; + else + { + GNUNET_break (0); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "id: %u, next: %u, prev: %u\n", + peer->id, t->next_hop, t->prev_hop); + return data_size; + } + if (NULL != peer->queue_head) + { + if (GNUNET_SCHEDULER_NO_TASK == fc->poll_task && fc->queue_n > 0) { - fc->t = t; + GNUNET_log (GNUNET_ERROR_TYPE_INFO, + "* %s starting poll timeout\n", + GNUNET_i2s (&my_full_id)); fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time, &tunnel_poll, fc); } } + else + { + if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task) + { + GNUNET_SCHEDULER_cancel (fc->poll_task); + fc->poll_task = GNUNET_SCHEDULER_NO_TASK; + } + } + if (GNUNET_YES == t->destroy && 0 == t->pending_messages) + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* destroying tunnel!\n"); + tunnel_destroy (t); + } GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Return %d\n", data_size); return data_size; } @@ -3196,12 +3789,12 @@ queue_send (void *cls, size_t size, void *buf) /** * @brief Queue and pass message to core when possible. - * + * * If type is payload (UNICAST, TO_ORIGIN) checks for queue status and * accounts for it. In case the queue is full, the message is dropped and * a break issued. - * - * Otherwise, message is treated as internal and allowed to go regardless of + * + * Otherwise, message is treated as internal and allowed to go regardless of * queue status. * * @param cls Closure (@c type dependant). It will be used by queue_send to @@ -3213,13 +3806,10 @@ queue_send (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 MeshPeer *dst, struct MeshTunnel *t) { struct MeshPeerQueue *queue; - struct GNUNET_PeerIdentity id; struct MeshFlowControl *fc; - uint32_t pid; - uint32_t pid_q; int priority; fc = NULL; @@ -3227,58 +3817,36 @@ queue_add (void *cls, uint16_t type, size_t size, if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type) { fc = &t->next_fc; - pid = ntohl (((struct GNUNET_MESH_Data *)cls)->pid); } else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type) { fc = &t->prev_fc; - pid = ntohl (((struct GNUNET_MESH_Data *)cls)->pid); } if (NULL != fc) { if (fc->queue_n >= t->queue_max) { - GNUNET_break (0); - GNUNET_log (GNUNET_ERROR_TYPE_WARNING, - "queue full: %u/%u\n", - fc->queue_n, t->queue_max); - GNUNET_STATISTICS_update (stats, - "# messages dropped (buffer full)", - 1, GNUNET_NO); - /* Get the PID of the oldest message in the queue */ - for (queue = dst->queue_head; queue != NULL; queue = queue->next) - if (queue->type == type && queue->tunnel == t) - { - pid_q = ntohl (((struct GNUNET_MESH_Data *)(queue->cls))->pid); - GNUNET_log (GNUNET_ERROR_TYPE_WARNING, - "pid: %u, pid_q: %u\n", pid, pid_q); - break; - } - GNUNET_assert (NULL != queue); - - /* If this is an earlier message that that, give it priority: - * - drop the newest message in the queue - * - instert current one at the end of the queue (first to get out) - */ - if (GNUNET_YES == t->reliable && GMC_is_pid_bigger(pid_q, pid)) + /* If this isn't a retransmission, drop the message */ + if (GNUNET_NO == t->reliable || + (NULL == t->owner && GNUNET_MESSAGE_TYPE_MESH_UNICAST == type) || + (NULL == t->client && GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)) { - for (queue = dst->queue_tail; queue != NULL; queue = queue->prev) - if (queue->type == type && queue->tunnel == t) - { - /* Drop message from queue */ - pid_q = ntohl (((struct GNUNET_MESH_Data *)(queue->cls))->pid); - GNUNET_log (GNUNET_ERROR_TYPE_WARNING, - "dropping pid: %u\n", pid_q); - queue_destroy (queue, GNUNET_YES); - t->pending_messages--; - priority = GNUNET_YES; - break; - } - } - else + GNUNET_STATISTICS_update (stats, "# messages dropped (buffer full)", + 1, GNUNET_NO); + GNUNET_break (0); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "queue full: %u/%u\n", + fc->queue_n, t->queue_max); return; /* Drop this message */ + } + priority = GNUNET_YES; } fc->queue_n++; + if (GMC_is_pid_bigger(fc->last_pid_sent + 1, fc->last_ack_recv) && + GNUNET_SCHEDULER_NO_TASK == fc->poll_task) + fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time, + &tunnel_poll, + fc); } queue = GNUNET_malloc (sizeof (struct MeshPeerQueue)); queue->cls = cls; @@ -3287,18 +3855,35 @@ queue_add (void *cls, uint16_t type, size_t size, queue->peer = dst; queue->tunnel = t; if (GNUNET_YES == priority) + { + struct GNUNET_MESH_Data *d; + uint32_t prev; + uint32_t next; + GNUNET_CONTAINER_DLL_insert (dst->queue_head, dst->queue_tail, queue); + d = (struct GNUNET_MESH_Data *) queue->cls; + prev = d->pid; + for (queue = dst->queue_tail; NULL != queue; queue = queue->prev) + { + if (queue->type != type) + continue; + d = (struct GNUNET_MESH_Data *) queue->cls; + next = d->pid; + d->pid = prev; + prev = next; + } + } else GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue); + if (NULL == dst->core_transmit) { - GNUNET_PEER_resolve (dst->id, &id); dst->core_transmit = GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0, GNUNET_TIME_UNIT_FOREVER_REL, - &id, + GNUNET_PEER_resolve2 (dst->id), size, &queue_send, dst); @@ -3333,8 +3918,8 @@ handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer, struct GNUNET_MESH_CreateTunnel *msg; struct GNUNET_PeerIdentity *pi; struct MeshPeerPath *path; - struct MeshPeerInfo *dest_peer_info; - struct MeshPeerInfo *orig_peer_info; + struct MeshPeer *dest_peer_info; + struct MeshPeer *orig_peer_info; struct MeshTunnel *t; GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, @@ -3365,7 +3950,8 @@ handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer, tid = ntohl (msg->tid); pi = (struct GNUNET_PeerIdentity *) &msg[1]; GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - " path is for tunnel %s[%X].\n", GNUNET_i2s (pi), tid); + " path is for tunnel %s[%X]:%u.\n", + GNUNET_i2s (pi), tid, ntohl (msg->port)); t = tunnel_get (pi, tid); if (NULL == t) /* might be a local tunnel */ { @@ -3390,30 +3976,29 @@ handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer, t->reliable = GNUNET_YES; } GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " nobuffer:%d\n", t->nobuffer); - - tunnel_reset_timeout (t); } - t->state = MESH_TUNNEL_WAITING; + tunnel_reset_timeout (t, GNUNET_YES); + tunnel_change_state (t, MESH_TUNNEL_WAITING); dest_peer_info = - GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey); + GNUNET_CONTAINER_multipeermap_get (peers, &pi[size - 1]); if (NULL == dest_peer_info) { GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating PeerInfo for destination.\n"); - dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo)); + dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeer)); dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]); - GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey, + GNUNET_CONTAINER_multipeermap_put (peers, &pi[size - 1], dest_peer_info, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY); } - orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey); + orig_peer_info = GNUNET_CONTAINER_multipeermap_get (peers, pi); if (NULL == orig_peer_info) { GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating PeerInfo for origin.\n"); - orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo)); + orig_peer_info = GNUNET_new (struct MeshPeer); orig_peer_info->id = GNUNET_PEER_intern (pi); - GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info, + GNUNET_CONTAINER_multipeermap_put (peers, pi, orig_peer_info, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY); } GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n"); @@ -3439,7 +4024,7 @@ handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer, path_add_to_peers (path, GNUNET_NO); tunnel_use_path (t, path); - peer_info_add_tunnel (dest_peer_info, t); + peer_add_tunnel (dest_peer_info, t); if (own_pos == size - 1) { @@ -3454,25 +4039,33 @@ handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer, } GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n"); - peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_YES); + peer_add_path_to_origin (orig_peer_info, path, GNUNET_YES); + /* This can be a retransmission due to a lost PATH ACK. + * Check if we already have a destination client for the tunnel. */ + if (t->client != c) + { + /* Assign local tid */ + 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; - /* Assign local tid */ - 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; + if (GNUNET_YES == t->reliable) + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Reliable\n"); + t->bck_rel = GNUNET_malloc (sizeof (struct MeshTunnelReliability)); + t->bck_rel->t = t; + t->bck_rel->expected_delay = MESH_RETRANSMIT_TIME; + } - if (GNUNET_YES == t->reliable) - { - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Reliable\n"); - t->bck_rel = GNUNET_malloc (sizeof (struct MeshTunnelReliability)); - t->bck_rel->t = t; - t->bck_rel->expected_delay = MESH_RETRANSMIT_TIME; + tunnel_add_client (t, c); + send_local_tunnel_create (t); } - - tunnel_add_client (t, c); - send_client_tunnel_create (t); send_path_ack (t); + /* Eliminate tunnel when origin dies */ + tunnel_reset_timeout (t, GNUNET_YES); + /* Keep tunnel alive in direction dest->owner*/ + tunnel_reset_timeout (t, GNUNET_NO); } else { @@ -3484,9 +4077,9 @@ handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer, /* It's for somebody else! Retransmit. */ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n"); path2 = path_duplicate (path); - peer_info_add_path (dest_peer_info, path2, GNUNET_NO); - peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO); - send_create_path (t); + peer_add_path (dest_peer_info, path2, GNUNET_NO); + peer_add_path_to_origin (orig_peer_info, path, GNUNET_NO); + send_path_create (t); } return GNUNET_OK; } @@ -3508,7 +4101,7 @@ handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer, const struct GNUNET_MessageHeader *message) { struct GNUNET_MESH_PathACK *msg; - struct MeshPeerInfo *peer_info; + struct MeshPeer *peer_info; struct MeshPeerPath *p; struct MeshTunnel *t; @@ -3543,7 +4136,8 @@ handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer, { GNUNET_break (0); } - t->state = MESH_TUNNEL_READY; + tunnel_change_state (t, MESH_TUNNEL_READY); + tunnel_reset_timeout (t, GNUNET_NO); t->next_fc.last_ack_recv = (NULL == t->client) ? ntohl (msg->ack) : 0; t->prev_fc.last_ack_sent = ntohl (msg->ack); @@ -3561,14 +4155,13 @@ handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer, GNUNET_DHT_get_stop (peer_info->dhtget); peer_info->dhtget = NULL; } - tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK); - tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK); + tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK, GNUNET_YES); + tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK, GNUNET_NO); return GNUNET_OK; } GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not for us, retransmitting...\n"); - peer_info = peer_get (&msg->oid); send_prebuilt_message (message, t->prev_hop, t); return GNUNET_OK; } @@ -3682,26 +4275,31 @@ handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer, /** - * Core handler for mesh network traffic going from the origin to a peer + * Generic handler for mesh network payload traffic. + * + * @param peer Peer identity this notification is about. + * @param message Data message. + * @param fwd Is this FWD traffic? GNUNET_YES : GNUNET_NO; * - * @param cls closure - * @param peer peer identity this notification is about - * @param message message * @return GNUNET_OK to keep the connection open, * GNUNET_SYSERR to close it (signal serious error) */ static int -handle_mesh_unicast (void *cls, const struct GNUNET_PeerIdentity *peer, - const struct GNUNET_MessageHeader *message) +handle_mesh_data (const struct GNUNET_PeerIdentity *peer, + const struct GNUNET_MessageHeader *message, + int fwd) { struct GNUNET_MESH_Data *msg; + struct MeshFlowControl *fc; + struct MeshTunnelReliability *rel; struct MeshTunnel *t; + struct MeshClient *c; + GNUNET_PEER_Id hop; uint32_t pid; uint32_t ttl; + uint16_t type; 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 < @@ -3711,8 +4309,11 @@ handle_mesh_unicast (void *cls, const struct GNUNET_PeerIdentity *peer, GNUNET_break (0); return GNUNET_OK; } + type =ntohs (message->type); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a %s message from %s\n", + GNUNET_MESH_DEBUG_M2S (type), GNUNET_i2s (peer)); msg = (struct GNUNET_MESH_Data *) message; - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n", + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " payload of type %s\n", GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type))); /* Check tunnel */ t = tunnel_get (&msg->oid, ntohl (msg->tid)); @@ -3720,56 +4321,92 @@ handle_mesh_unicast (void *cls, const struct GNUNET_PeerIdentity *peer, { /* TODO notify back: we don't know this tunnel */ GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO); - GNUNET_break_op (0); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "WARNING tunnel unknown\n"); return GNUNET_OK; } + + /* Initialize FWD/BCK data */ pid = ntohl (msg->pid); - if (GMC_is_pid_bigger (pid, t->prev_fc.last_ack_sent)) + fc = fwd ? &t->prev_fc : &t->next_fc; + c = fwd ? t->client : t->owner; + rel = fwd ? t->bck_rel : t->fwd_rel; + hop = fwd ? t->next_hop : t->prev_hop; + if (GMC_is_pid_bigger (pid, fc->last_ack_sent)) { - GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO); - GNUNET_break_op (0); + GNUNET_STATISTICS_update (stats, "# unsolicited data", 1, GNUNET_NO); GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Received PID %u, ACK %u\n", - pid, t->prev_fc.last_ack_sent); - tunnel_send_fwd_ack(t, GNUNET_MESSAGE_TYPE_MESH_POLL); + "WARNING Received PID %u, (prev %u), ACK %u\n", + pid, fc->last_pid_recv, fc->last_ack_sent); return GNUNET_OK; } - - tunnel_reset_timeout (t); - if (t->dest == myid) + if (NULL != c) + tunnel_change_state (t, MESH_TUNNEL_READY); + tunnel_reset_timeout (t, fwd); + if (NULL != c) { /* TODO signature verification */ - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - " it's for us! sending to clients...\n"); - GNUNET_STATISTICS_update (stats, "# unicast received", 1, GNUNET_NO); -// if (GMC_is_pid_bigger(pid, t->prev_fc.last_pid_recv)) FIXME use - if ( (GNUNET_NO == t->reliable && - GMC_is_pid_bigger(pid, t->prev_fc.last_pid_recv)) - || - (GNUNET_YES == t->reliable && - pid == t->prev_fc.last_pid_recv + 1) ) + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " it's for us! sending to client\n"); + GNUNET_STATISTICS_update (stats, "# data received", 1, GNUNET_NO); + if (GMC_is_pid_bigger (pid, fc->last_pid_recv)) { + uint32_t mid; + + mid = ntohl (msg->mid); GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - " pid %u not seen yet, forwarding\n", pid); - t->prev_fc.last_pid_recv = pid; - tunnel_send_client_ucast (t, msg); + " pid %u (mid %u) not seen yet\n", pid, mid); + fc->last_pid_recv = pid; + + if (GNUNET_NO == t->reliable || + ( !GMC_is_pid_bigger (rel->mid_recv, mid) && + GMC_is_pid_bigger (rel->mid_recv + 64, mid) ) ) + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "!!! RECV %u\n", ntohl (msg->mid)); + if (GNUNET_YES == t->reliable) + { + /* Is this the exact next expected messasge? */ + if (mid == rel->mid_recv) + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "as expected\n"); + rel->mid_recv++; + tunnel_send_client_data (t, msg, fwd); + tunnel_send_client_buffered_data (t, c, rel); + } + else + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "save for later\n"); + tunnel_add_buffered_data (t, msg, rel); + } + } + else /* Tunnel unreliable, send to clients directly */ + { + tunnel_send_client_data (t, msg, fwd); + } + } + else + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + " MID %u not expected (%u - %u), dropping!\n", + ntohl (msg->mid), rel->mid_recv, rel->mid_recv + 64); + } } else { // GNUNET_STATISTICS_update (stats, "# duplicate PID", 1, GNUNET_NO); - GNUNET_log (GNUNET_ERROR_TYPE_WARNING, - " Pid %u not expected (%u), sending FWD ACK!\n", - pid, t->prev_fc.last_pid_recv + 1); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + " Pid %u not expected (%u+), dropping!\n", + pid, fc->last_pid_recv + 1); } - tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK); + tunnel_send_ack (t, type, fwd); return GNUNET_OK; } - if (GMC_is_pid_bigger(pid, t->prev_fc.last_pid_recv)) - t->prev_fc.last_pid_recv = pid; - if (0 == t->next_hop) + fc->last_pid_recv = pid; + if (0 == hop) { - GNUNET_break (0); - return GNUNET_OK; + GNUNET_STATISTICS_update (stats, "# data on dying tunnel", 1, GNUNET_NO); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "data on dying tunnel %s[%X]\n", + GNUNET_PEER_resolve2 (t->id.oid), ntohl (msg->tid)); + return GNUNET_OK; /* Next hop has destoyed the tunnel, drop */ } ttl = ntohl (msg->ttl); GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl); @@ -3777,134 +4414,52 @@ handle_mesh_unicast (void *cls, const struct GNUNET_PeerIdentity *peer, { 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); + tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK, fwd); return GNUNET_OK; } - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - " not for us, retransmitting...\n"); - send_prebuilt_message (message, t->next_hop, t); - GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO); + if (myid != hop) + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not for us, retransmitting...\n"); + send_prebuilt_message (message, hop, t); + GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO); + } return GNUNET_OK; } /** - * Core handler for mesh network traffic toward the owner of a tunnel + * Core handler for mesh network traffic going from the origin to a peer * - * @param cls closure - * @param message message - * @param peer peer identity this notification is about + * @param cls Closure (unused). + * @param message Message received. + * @param peer Peer who sent the message. * * @return GNUNET_OK to keep the connection open, * GNUNET_SYSERR to close it (signal serious error) */ static int -handle_mesh_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer, - const struct GNUNET_MessageHeader *message) +handle_mesh_unicast (void *cls, const struct GNUNET_PeerIdentity *peer, + const struct GNUNET_MessageHeader *message) { - struct GNUNET_MESH_Data *msg; - struct MeshTunnel *t; - size_t size; - uint32_t pid; - uint32_t ttl; - - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n", - GNUNET_i2s (peer)); - size = ntohs (message->size); - if (size < sizeof (struct GNUNET_MESH_Data) + /* Payload must be */ - sizeof (struct GNUNET_MessageHeader)) /* at least a header */ - { - GNUNET_break_op (0); - return GNUNET_OK; - } - msg = (struct GNUNET_MESH_Data *) 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)); - pid = ntohl (msg->pid); - if (NULL == t) - { - /* TODO notify that we dont know this tunnel (whom)? */ - GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO); - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Received to_origin with PID %u on unknown tunnel %s [%u]\n", - pid, GNUNET_i2s (&msg->oid), ntohl (msg->tid)); - return GNUNET_OK; - } - - if (GMC_is_pid_bigger (pid, t->next_fc.last_ack_sent)) - { - GNUNET_STATISTICS_update (stats, "# unsolicited to_orig", 1, GNUNET_NO); - GNUNET_break_op (0); - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Received PID %u, ACK %u\n", - pid, t->next_fc.last_ack_sent); - tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL); - return GNUNET_OK; - } - - if (myid == t->id.oid) - { - /* TODO signature verification */ - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - " it's for us! sending to clients...\n"); - GNUNET_STATISTICS_update (stats, "# to origin received", 1, GNUNET_NO); - if ( (GNUNET_NO == t->reliable && - GMC_is_pid_bigger(pid, t->next_fc.last_pid_recv)) - || - (GNUNET_YES == t->reliable && - pid == t->next_fc.last_pid_recv + 1) ) // FIXME use "futures" as accepting - { - t->next_fc.last_pid_recv = pid; - tunnel_send_client_to_orig (t, msg); - } - else - { -// GNUNET_STATISTICS_update (stats, "# duplicate PID drops BCK", 1, GNUNET_NO); - GNUNET_log (GNUNET_ERROR_TYPE_WARNING, - " Pid %u not expected, sending FWD ACK!\n", pid); - } - tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK); - return GNUNET_OK; - } - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - " not for us, retransmitting...\n"); - if (GMC_is_pid_bigger (pid, t->next_fc.last_pid_recv)) - t->next_fc.last_pid_recv = pid; - if (0 == t->prev_hop) /* No owner AND no prev hop */ - { - if (GNUNET_YES == t->destroy) - { - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "to orig received on a dying tunnel %s [%X]\n", - GNUNET_i2s (&msg->oid), ntohl(msg->tid)); - return GNUNET_OK; - } - GNUNET_log (GNUNET_ERROR_TYPE_ERROR, - "unknown to origin at %s\n", - GNUNET_i2s (&my_full_id)); - GNUNET_log (GNUNET_ERROR_TYPE_ERROR, - "from peer %s\n", - GNUNET_i2s (peer)); - GNUNET_log (GNUNET_ERROR_TYPE_ERROR, - "on tunnel %s [%X]\n", - GNUNET_i2s (&msg->oid), ntohl(msg->tid)); - 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_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK); - return GNUNET_OK; - } - send_prebuilt_message (message, t->prev_hop, t); - GNUNET_STATISTICS_update (stats, "# to origin forwarded", 1, GNUNET_NO); + return handle_mesh_data (peer, message, GNUNET_YES); +} - return GNUNET_OK; +/** + * Core handler for mesh network traffic towards the owner of a tunnel. + * + * @param cls Closure (unused). + * @param message Message received. + * @param peer Peer who sent the message. + * + * @return GNUNET_OK to keep the connection open, + * GNUNET_SYSERR to close it (signal serious error) + */ +static int +handle_mesh_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer, + const struct GNUNET_MessageHeader *message) +{ + return handle_mesh_data (peer, message, GNUNET_NO); } @@ -3944,7 +4499,7 @@ handle_mesh_data_ack (void *cls, const struct GNUNET_PeerIdentity *peer, GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO); return GNUNET_OK; } - ack = ntohl (msg->pid); + ack = ntohl (msg->mid); GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack); /* Is this a forward or backward ACK? */ @@ -3958,7 +4513,6 @@ handle_mesh_data_ack (void *cls, const struct GNUNET_PeerIdentity *peer, return GNUNET_OK; } rel = t->fwd_rel; - tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST); } else if (t->prev_hop == id && GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK == type) { @@ -3969,7 +4523,6 @@ handle_mesh_data_ack (void *cls, const struct GNUNET_PeerIdentity *peer, return GNUNET_OK; } rel = t->bck_rel; - tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN); } else { @@ -3980,27 +4533,21 @@ handle_mesh_data_ack (void *cls, const struct GNUNET_PeerIdentity *peer, GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! ACK %u\n", ack); for (work = GNUNET_NO, copy = rel->head_sent; copy != NULL; copy = next) { - struct GNUNET_TIME_Relative time; - - if (copy->id > ack) + if (GMC_is_pid_bigger (copy->mid, ack)) { - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! head %u, out!\n", copy->id); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! head %u, out!\n", copy->mid); + tunnel_free_sent_reliable (t, msg, rel); break; } work = GNUNET_YES; - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! id %u\n", copy->id); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! id %u\n", copy->mid); next = copy->next; - time = GNUNET_TIME_absolute_get_duration (copy->timestamp); - rel->expected_delay.rel_value += time.rel_value; - rel->expected_delay.rel_value /= 2; - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! new expected delay %s\n", - GNUNET_STRINGS_relative_time_to_string (rel->expected_delay, - GNUNET_NO)); - rel->retry_timer = rel->expected_delay; - GNUNET_CONTAINER_DLL_remove (rel->head_sent, rel->tail_sent, copy); - GNUNET_free (copy); + tunnel_free_reliable_message (copy); } + /* Once buffers have been free'd, send ACK */ + tunnel_send_ack (t, type, GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK == type); + /* If some message was free'd, update the retransmission delay*/ if (GNUNET_YES == work) { if (GNUNET_SCHEDULER_NO_TASK != rel->retry_task) @@ -4015,8 +4562,10 @@ handle_mesh_data_ack (void *cls, const struct GNUNET_PeerIdentity *peer, struct GNUNET_TIME_Absolute new_target; struct GNUNET_TIME_Relative delay; + delay = GNUNET_TIME_relative_multiply (rel->retry_timer, + MESH_RETRANSMIT_MARGIN); new_target = GNUNET_TIME_absolute_add (rel->head_sent->timestamp, - rel->retry_timer); + delay); delay = GNUNET_TIME_absolute_get_remaining (new_target); rel->retry_task = GNUNET_SCHEDULER_add_delayed (delay, @@ -4069,13 +4618,11 @@ handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer, id = GNUNET_PEER_search (peer); if (t->next_hop == id) { - debug_fwd_ack++; GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n"); fc = &t->next_fc; } else if (t->prev_hop == id) { - debug_bck_ack++; GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n"); fc = &t->prev_fc; } @@ -4092,13 +4639,12 @@ handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer, fc->poll_task = GNUNET_SCHEDULER_NO_TASK; fc->poll_time = GNUNET_TIME_UNIT_SECONDS; } + fc->last_ack_recv = ack; peer_unlock_queue (id); + tunnel_change_state (t, MESH_TUNNEL_READY); - if (t->next_hop == id) - tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK); - else - tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK); + tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK, t->next_hop == id); return GNUNET_OK; } @@ -4125,7 +4671,7 @@ handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer, uint32_t pid; uint32_t old; - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an POLL packet from %s!\n", + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a POLL packet from %s!\n", GNUNET_i2s (peer)); msg = (struct GNUNET_MESH_Poll *) message; @@ -4141,30 +4687,31 @@ handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer, } /* Is this a forward or backward ACK? */ - id = GNUNET_PEER_search(peer); + id = GNUNET_PEER_search (peer); pid = ntohl (msg->pid); GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PID %u\n", pid); if (t->next_hop == id) { GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from FWD\n"); - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " was %u\n", t->next_fc.last_pid_recv); fc = &t->next_fc; old = fc->last_pid_recv; - fc->last_pid_recv = pid; - tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL); } else if (t->prev_hop == id) { GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from BCK\n"); - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " was %u\n", t->prev_fc.last_pid_recv); fc = &t->prev_fc; old = fc->last_pid_recv; - fc->last_pid_recv = pid; - tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL); } else + { GNUNET_break (0); - + return GNUNET_OK; + } + + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " was %u\n", fc->last_pid_recv); + fc->last_pid_recv = pid; + tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL, t->prev_hop == id); + if (GNUNET_YES == t->reliable) fc->last_pid_recv = old; @@ -4189,13 +4736,15 @@ handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer, { struct GNUNET_MESH_TunnelKeepAlive *msg; struct MeshTunnel *t; + struct MeshClient *c; + GNUNET_PEER_Id hop; + int fwd; + msg = (struct GNUNET_MESH_TunnelKeepAlive *) message; GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n", GNUNET_i2s (peer)); - msg = (struct GNUNET_MESH_TunnelKeepAlive *) message; t = tunnel_get (&msg->oid, ntohl (msg->tid)); - if (NULL == t) { /* TODO notify that we dont know that tunnel */ @@ -4204,12 +4753,19 @@ handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer, return GNUNET_OK; } - tunnel_reset_timeout (t); - if (NULL != t->client || 0 == t->next_hop || myid == t->next_hop) + fwd = GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE == ntohs (message->type) ? + GNUNET_YES : GNUNET_NO; + c = fwd ? t->client : t->owner; + hop = fwd ? t->next_hop : t->prev_hop; + + if (NULL != c) + tunnel_change_state (t, MESH_TUNNEL_READY); + tunnel_reset_timeout (t, fwd); + if (NULL != c || 0 == hop || myid == hop) return GNUNET_OK; GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO); - send_prebuilt_message (message, t->next_hop, t); + send_prebuilt_message (message, hop, t); return GNUNET_OK; } @@ -4230,7 +4786,9 @@ static struct GNUNET_CORE_MessageHandler core_handlers[] = { sizeof (struct GNUNET_MESH_DataACK)}, {&handle_mesh_data_ack, GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK, sizeof (struct GNUNET_MESH_DataACK)}, - {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE, + {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE, + sizeof (struct GNUNET_MESH_TunnelKeepAlive)}, + {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE, sizeof (struct GNUNET_MESH_TunnelKeepAlive)}, {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK, sizeof (struct GNUNET_MESH_ACK)}, @@ -4242,90 +4800,6 @@ static struct GNUNET_CORE_MessageHandler core_handlers[] = { }; - -/******************************************************************************/ -/**************** MESH LOCAL HANDLER HELPERS ***********************/ -/******************************************************************************/ - - -#if LATER -/** - * notify_client_connection_failure: notify a client that the connection to the - * requested remote peer is not possible (for instance, no route found) - * Function called when the socket is 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 - * @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 -notify_client_connection_failure (void *cls, size_t size, void *buf) -{ - int size_needed; - struct MeshPeerInfo *peer_info; - struct GNUNET_MESH_PeerControl *msg; - struct GNUNET_PeerIdentity id; - - if (0 == size && NULL == buf) - { - // TODO retry? cancel? - return 0; - } - - size_needed = sizeof (struct GNUNET_MESH_PeerControl); - peer_info = (struct MeshPeerInfo *) cls; - msg = (struct GNUNET_MESH_PeerControl *) buf; - msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl)); - msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED); -// msg->tunnel_id = htonl(peer_info->t->tid); - GNUNET_PEER_resolve (peer_info->id, &id); - memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity)); - - return size_needed; -} -#endif - - -/** - * Send keepalive packets for a tunnel. - * - * @param cls Closure (tunnel for which to send the keepalive). - * @param tc Notification context. - * - * FIXME: add a refresh reset in case of normal unicast traffic is doing the job - */ -static void -path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) -{ - struct MeshTunnel *t = cls; - struct GNUNET_MESH_TunnelKeepAlive *msg; - size_t size = sizeof (struct GNUNET_MESH_TunnelKeepAlive); - char cbuf[size]; - - t->maintenance_task = GNUNET_SCHEDULER_NO_TASK; - if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) || - NULL == t->owner || 0 == t->local_tid) - { - return; - } - - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "sending keepalive for tunnel %d\n", t->id.tid); - - msg = (struct GNUNET_MESH_TunnelKeepAlive *) cbuf; - msg->header.size = htons (size); - msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE); - msg->oid = my_full_id; - msg->tid = htonl (t->id.tid); - send_prebuilt_message (&msg->header, t->next_hop, t); - - t->maintenance_task = - GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t); -} - - /** * Function to process paths received for a new peer addition. The recorded * paths form the initial tunnel, which can be optimized later. @@ -4351,7 +4825,7 @@ dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp, unsigned int put_path_length, enum GNUNET_BLOCK_Type type, size_t size, const void *data) { - struct MeshPeerInfo *peer = cls; + struct MeshPeer *peer = cls; struct MeshPeerPath *p; struct GNUNET_PeerIdentity pi; int i; @@ -4371,7 +4845,7 @@ dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp, GNUNET_PEER_resolve (peer->tunnels[i]->id.oid, &id); GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... tunnel %s:%X (%X / %X)\n", GNUNET_i2s (&id), peer->tunnels[i]->id.tid, - peer->tunnels[i]->local_tid, + peer->tunnels[i]->local_tid, peer->tunnels[i]->local_tid_dest); if (peer->tunnels[i]->state == MESH_TUNNEL_SEARCHING) { @@ -4389,6 +4863,27 @@ dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp, /******************************************************************************/ +/** + * Handler for client connection. + * + * @param cls Closure (unused). + * @param client Client handler. + */ +static void +handle_local_client_connect (void *cls, struct GNUNET_SERVER_Client *client) +{ + struct MeshClient *c; + + if (NULL == client) + return; + c = GNUNET_malloc (sizeof (struct MeshClient)); + c->handle = client; + GNUNET_SERVER_client_keep (client); + GNUNET_SERVER_client_set_user_context (client, c); + GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c); +} + + /** * Handler for client disconnection * @@ -4400,7 +4895,6 @@ static void handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client) { struct MeshClient *c; - struct MeshClient *next; GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected: %p\n", client); if (client == NULL) @@ -4409,36 +4903,41 @@ handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client) return; } - c = clients_head; - while (NULL != c) + c = client_get (client); + if (NULL != c) { - if (c->handle != client) - { - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - " ... searching %p (%u)\n", - c->handle, c->id); - c = c->next; - continue; - } - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n", - c->id); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u, %p)\n", + c->id, c); GNUNET_SERVER_client_drop (c->handle); c->shutting_down = GNUNET_YES; - GNUNET_CONTAINER_multihashmap32_iterate (c->own_tunnels, - &tunnel_destroy_iterator, c); - GNUNET_CONTAINER_multihashmap32_iterate (c->incoming_tunnels, - &tunnel_destroy_iterator, c); - GNUNET_CONTAINER_multihashmap32_destroy (c->own_tunnels); - GNUNET_CONTAINER_multihashmap32_destroy (c->incoming_tunnels); + if (NULL != c->own_tunnels) + { + GNUNET_CONTAINER_multihashmap32_iterate (c->own_tunnels, + &tunnel_destroy_iterator, c); + GNUNET_CONTAINER_multihashmap32_destroy (c->own_tunnels); + } + + if (NULL != c->incoming_tunnels) + { + GNUNET_CONTAINER_multihashmap32_iterate (c->incoming_tunnels, + &tunnel_destroy_iterator, c); + GNUNET_CONTAINER_multihashmap32_destroy (c->incoming_tunnels); + } if (NULL != c->ports) + { + GNUNET_CONTAINER_multihashmap32_iterate (c->ports, + &client_release_ports, c); GNUNET_CONTAINER_multihashmap32_destroy (c->ports); - next = c->next; + } GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c); - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client free (%p)\n", c); GNUNET_free (c); GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO); - c = next; + } + else + { + GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " context NULL!\n"); } GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "done!\n"); return; @@ -4475,13 +4974,11 @@ handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client, } size /= sizeof (uint32_t); - /* Create new client structure */ - c = GNUNET_malloc (sizeof (struct MeshClient)); + /* Initialize new client structure */ + c = GNUNET_SERVER_client_get_user_context (client, struct MeshClient); c->id = next_client_id++; /* overflow not important: just for debug */ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client id %u\n", c->id); GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client has %u ports\n", size); - c->handle = client; - GNUNET_SERVER_client_keep (client); if (size > 0) { uint32_t u32; @@ -4504,7 +5001,6 @@ handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client, } } - GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c); c->own_tunnels = GNUNET_CONTAINER_multihashmap32_create (32); c->incoming_tunnels = GNUNET_CONTAINER_multihashmap32_create (32); GNUNET_SERVER_notification_context_add (nc, client); @@ -4527,7 +5023,7 @@ handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client, const struct GNUNET_MessageHeader *message) { struct GNUNET_MESH_TunnelMessage *t_msg; - struct MeshPeerInfo *peer_info; + struct MeshPeer *peer_info; struct MeshTunnel *t; struct MeshClient *c; MESH_TunnelNumber tid; @@ -4552,16 +5048,9 @@ handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client, } t_msg = (struct GNUNET_MESH_TunnelMessage *) message; - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " towards %s\n", - GNUNET_i2s (&t_msg->peer)); - /* Sanity check for tunnel numbering */ + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " towards %s:%u\n", + GNUNET_i2s (&t_msg->peer), ntohl (t_msg->port)); 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, tid)) { @@ -4582,7 +5071,7 @@ handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client, return; } t->port = ntohl (t_msg->port); - tunnel_set_options (t, ntohl (t_msg->options)); + tunnel_set_options (t, ntohl (t_msg->opt)); if (GNUNET_YES == t->reliable) { GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Reliable\n"); @@ -4595,8 +5084,9 @@ handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client, GNUNET_i2s (&my_full_id), t->id.tid, t->port, t->local_tid); peer_info = peer_get (&t_msg->peer); - peer_info_add_tunnel (peer_info, t); + peer_add_tunnel (peer_info, t); peer_connect (peer_info, t); + tunnel_reset_timeout (t, GNUNET_YES); GNUNET_SERVER_receive_done (client, GNUNET_OK); return; } @@ -4642,7 +5132,7 @@ handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client, /* Retrieve tunnel */ tid = ntohl (tunnel_msg->tunnel_id); - t = tunnel_get_by_local_id(c, tid); + t = tunnel_get_by_local_id (c, tid); if (NULL == t) { GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid); @@ -4653,15 +5143,22 @@ handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client, /* Cleanup after the tunnel */ client_delete_tunnel (c, t); - if (c == t->client) + if (c == t->client && GNUNET_MESH_LOCAL_TUNNEL_ID_SERV <= tid) { t->client = NULL; } - if (c == t->owner) + else if (c == t->owner && GNUNET_MESH_LOCAL_TUNNEL_ID_SERV > tid) { - peer_info_remove_tunnel (peer_get_short (t->dest), t); + peer_remove_tunnel (peer_get_short (t->dest), t); t->owner = NULL; } + else + { + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + " tunnel %X client %p (%p, %p)\n", + tid, c, t->owner, t->client); + GNUNET_break (0); + } /* The tunnel will be destroyed when the last message is transmitted. */ tunnel_destroy_empty (t); @@ -4714,12 +5211,6 @@ handle_local_data (void *cls, struct GNUNET_SERVER_Client *client, /* Tunnel exists? */ tid = ntohl (data_msg->tid); - if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI) - { - GNUNET_break (0); - GNUNET_SERVER_receive_done (client, GNUNET_SYSERR); - return; - } t = tunnel_get_by_local_id (c, tid); if (NULL == t) { @@ -4734,7 +5225,7 @@ handle_local_data (void *cls, struct GNUNET_SERVER_Client *client, t->owner->handle == client) || (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV && - t->client && + t->client && t->client->handle == client) ) ) { GNUNET_break (0); @@ -4755,28 +5246,34 @@ handle_local_data (void *cls, struct GNUNET_SERVER_Client *client, struct MeshTunnelReliability *rel; struct MeshReliableMessage *copy; + rel = (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV) ? t->fwd_rel : t->bck_rel; copy = GNUNET_malloc (sizeof (struct MeshReliableMessage) + sizeof(struct GNUNET_MESH_Data) + size); - copy->id = fc->last_pid_recv + 1; - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! DATA %u\n", copy->id); + copy->mid = rel->mid_sent++; + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! DATA %u\n", copy->mid); copy->timestamp = GNUNET_TIME_absolute_get (); - rel = (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV) ? t->fwd_rel : t->bck_rel; copy->rel = rel; + rel->n_sent++; + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " n_sent %u\n", rel->n_sent); GNUNET_CONTAINER_DLL_insert_tail (rel->head_sent, rel->tail_sent, copy); if (GNUNET_SCHEDULER_NO_TASK == rel->retry_task) { - rel->retry_timer = rel->expected_delay; + rel->retry_timer = + GNUNET_TIME_relative_multiply (rel->expected_delay, + MESH_RETRANSMIT_MARGIN); rel->retry_task = GNUNET_SCHEDULER_add_delayed (rel->retry_timer, &tunnel_retransmit_message, rel); } payload = (struct GNUNET_MESH_Data *) ©[1]; + payload->mid = htonl (copy->mid); } else { payload = (struct GNUNET_MESH_Data *) cbuf; + payload->mid = htonl (fc->last_pid_recv + 1); } memcpy (&payload[1], &data_msg[1], size); payload->header.size = htons (sizeof (struct GNUNET_MESH_Data) + size); @@ -4843,17 +5340,17 @@ handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client, } /* Does client own tunnel? I.E: Is this an ACK for BCK traffic? */ - if (t->owner == c) + if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV) { /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */ t->prev_fc.last_ack_recv++; - tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK); + tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK, GNUNET_NO); } else { /* The client doesn't own the tunnel, this ACK is for FWD traffic. */ t->next_fc.last_ack_recv++; - tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK); + tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK, GNUNET_YES); } GNUNET_SERVER_receive_done (client, GNUNET_OK); @@ -5028,7 +5525,7 @@ static struct GNUNET_SERVER_MessageHandler client_handlers[] = { static void core_connect (void *cls, const struct GNUNET_PeerIdentity *peer) { - struct MeshPeerInfo *peer_info; + struct MeshPeer *peer_info; struct MeshPeerPath *path; DEBUG_CONN ("Peer connected\n"); @@ -5049,7 +5546,7 @@ core_connect (void *cls, const struct GNUNET_PeerIdentity *peer) } path->peers[0] = myid; GNUNET_PEER_change_rc (myid, 1); - peer_info_add_path (peer_info, path, GNUNET_YES); + peer_add_path (peer_info, path, GNUNET_YES); return; } @@ -5063,12 +5560,12 @@ core_connect (void *cls, const struct GNUNET_PeerIdentity *peer) static void core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer) { - struct MeshPeerInfo *pi; + struct MeshPeer *pi; struct MeshPeerQueue *q; struct MeshPeerQueue *n; DEBUG_CONN ("Peer disconnected\n"); - pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey); + pi = GNUNET_CONTAINER_multipeermap_get (peers, peer); if (NULL == pi) { GNUNET_break (0); @@ -5087,7 +5584,7 @@ core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer) GNUNET_CORE_notify_transmit_ready_cancel(pi->core_transmit); pi->core_transmit = NULL; } - peer_remove_path (pi, pi->id, myid); + peer_remove_path (pi, pi->id, myid); if (myid == pi->id) { DEBUG_CONN (" (self)\n"); @@ -5104,6 +5601,8 @@ static void server_init (void) { GNUNET_SERVER_add_handlers (server_handle, client_handlers); + GNUNET_SERVER_connect_notify (server_handle, + &handle_local_client_connect, NULL); GNUNET_SERVER_disconnect_notify (server_handle, &handle_local_client_disconnect, NULL); nc = GNUNET_SERVER_notification_context_create (server_handle, 1); @@ -5119,20 +5618,17 @@ server_init (void) * To be called on core init/fail. * * @param cls Closure (config) - * @param server handle to the server for this service * @param identity the public identity of this peer */ static void -core_init (void *cls, struct GNUNET_CORE_Handle *server, +core_init (void *cls, const struct GNUNET_PeerIdentity *identity) { const struct GNUNET_CONFIGURATION_Handle *c = cls; static int i = 0; GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n"); - GNUNET_break (core_handle == server); - if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) || - NULL == server) + if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id))) { GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n")); GNUNET_log (GNUNET_ERROR_TYPE_ERROR, @@ -5192,9 +5688,9 @@ shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value) * GNUNET_NO if not. */ static int -shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value) +shutdown_peer (void *cls, const struct GNUNET_PeerIdentity *key, void *value) { - struct MeshPeerInfo *p = value; + struct MeshPeer *p = value; struct MeshPeerQueue *q; struct MeshPeerQueue *n; @@ -5208,7 +5704,7 @@ shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value) } q = n; } - peer_info_destroy (p); + peer_destroy (p); return GNUNET_YES; } @@ -5230,7 +5726,7 @@ shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) core_handle = NULL; } GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL); - GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL); + GNUNET_CONTAINER_multipeermap_iterate (peers, &shutdown_peer, NULL); if (dht_handle != NULL) { GNUNET_DHT_disconnect (dht_handle); @@ -5262,7 +5758,7 @@ run (void *cls, struct GNUNET_SERVER_Handle *server, const struct GNUNET_CONFIGURATION_Handle *c) { char *keyfile; - struct GNUNET_CRYPTO_EccPrivateKey *pk; + struct GNUNET_CRYPTO_EddsaPrivateKey *pk; GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n"); server_handle = server; @@ -5388,7 +5884,7 @@ run (void *cls, struct GNUNET_SERVER_Handle *server, tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO); incoming_tunnels = GNUNET_CONTAINER_multihashmap32_create (32); - peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO); + peers = GNUNET_CONTAINER_multipeermap_create (32, GNUNET_NO); ports = GNUNET_CONTAINER_multihashmap32_create (32); dht_handle = GNUNET_DHT_connect (c, 64); @@ -5401,13 +5897,12 @@ run (void *cls, struct GNUNET_SERVER_Handle *server, /* Scheduled the task to clean up when shutdown is called */ GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task, NULL); - pk = GNUNET_CRYPTO_ecc_key_create_from_file (keyfile); + pk = GNUNET_CRYPTO_eddsa_key_create_from_file (keyfile); GNUNET_free (keyfile); GNUNET_assert (NULL != pk); my_private_key = pk; - GNUNET_CRYPTO_ecc_key_get_public (my_private_key, &my_public_key); - GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key), - &my_full_id.hashPubKey); + GNUNET_CRYPTO_eddsa_key_get_public (my_private_key, + &my_full_id.public_key); myid = GNUNET_PEER_intern (&my_full_id); GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Mesh for peer [%s] starting\n", @@ -5457,9 +5952,5 @@ main (int argc, char *const *argv) INTERVAL_SHOW; - GNUNET_log (GNUNET_ERROR_TYPE_INFO, - "Mesh for peer [%s] FWD ACKs %u, BCK ACKs %u\n", - GNUNET_i2s(&my_full_id), debug_fwd_ack, debug_bck_ack); - return ret; }