* - relay corking down to core
* - set ttl relative to path length
* TODO END
- *
- * Dictionary:
- * - peer: other mesh instance. If there is direct connection it's a neighbor.
- * - tunnel: encrypted connection to a peer, neighbor or not.
- * - channel: connection between two clients, on the same or different peers.
- * have properties like reliability.
- * - path: series of directly connected peer from one peer to another.
- * - connection: path which is being used in a tunnel.
- */
-
-#include "platform.h"
-#include "gnunet_crypto_lib.h"
-#include "mesh_enc.h"
-#include "mesh_protocol_enc.h"
-#include "mesh_path.h"
-#include "block_mesh.h"
-#include "gnunet_dht_service.h"
-#include "gnunet_statistics_service.h"
-
-#define MESH_BLOOM_SIZE 128
-
-#define MESH_DEBUG_DHT GNUNET_NO
-#define MESH_DEBUG_CONNECTION GNUNET_YES
-#define MESH_DEBUG_TIMING __LINUX__ && GNUNET_NO
-
-#define MESH_MAX_POLL_TIME GNUNET_TIME_relative_multiply (\
- GNUNET_TIME_UNIT_MINUTES,\
- 10)
-#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__)
-#else
-#define DEBUG_CONN(...)
-#endif
-
-#if MESH_DEBUG_DHT
-#define DEBUG_DHT(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
-#else
-#define DEBUG_DHT(...)
-#endif
-
-#if MESH_DEBUG_TIMING
-#include <time.h>
-double __sum;
-uint64_t __count;
-struct timespec __mesh_start;
-struct timespec __mesh_end;
-#define INTERVAL_START clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_start))
-#define INTERVAL_END \
-do {\
- clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_end));\
- double __diff = __mesh_end.tv_nsec - __mesh_start.tv_nsec;\
- if (__diff < 0) __diff += 1000000000;\
- __sum += __diff;\
- __count++;\
-} while (0)
-#define INTERVAL_SHOW \
-if (0 < __count)\
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "AVG process time: %f ns\n", __sum/__count)
-#else
-#define INTERVAL_START
-#define INTERVAL_END
-#define INTERVAL_SHOW
-#endif
-
-/**
- * All the states a tunnel can be in.
- */
-enum MeshTunnelState
-{
- /**
- * Uninitialized status, should never appear in operation.
- */
- MESH_TUNNEL_NEW,
-
- /**
- * Path to the peer not known yet
- */
- MESH_TUNNEL_SEARCHING,
-
- /**
- * Request sent, not yet answered.
- */
- MESH_TUNNEL_WAITING,
-
- /**
- * Peer connected and ready to accept data
- */
- MESH_TUNNEL_READY,
-
- /**
- * Peer connected previosly but not responding
- */
- MESH_TUNNEL_RECONNECTING
-};
-
-
-/**
- * All the states a connection can be in.
- */
-enum MeshConnectionState
-{
- /**
- * Uninitialized status, should never appear in operation.
- */
- MESH_CONNECTION_NEW,
-
- /**
- * Connection create message sent, waiting for ACK.
- */
- MESH_CONNECTION_SENT,
-
- /**
- * Connection ACK sent, waiting for ACK.
- */
- MESH_CONNECTION_ACK,
-
- /**
- * Connection confirmed, ready to carry traffic.
- */
- MESH_CONNECTION_READY,
-};
-
-
-/**
- * All the states a connection can be in.
- */
-enum MeshChannelState
-{
- /**
- * Uninitialized status, should never appear in operation.
- */
- MESH_CHANNEL_NEW,
-
- /**
- * Connection create message sent, waiting for ACK.
- */
- MESH_CHANNEL_SENT,
-
- /**
- * Connection confirmed, ready to carry traffic..
- */
- MESH_CHANNEL_READY,
-};
-
-
-/******************************************************************************/
-/************************ DATA STRUCTURES ****************************/
-/******************************************************************************/
-
-/** FWD declaration */
-struct MeshClient;
-struct MeshPeer;
-struct MeshTunnel2;
-struct MeshConnection;
-struct MeshChannel;
-struct MeshChannelReliability;
-
-
-/**
- * Struct containing info about a queued transmission to this peer
- */
-struct MeshPeerQueue
-{
- /**
- * DLL next
- */
- struct MeshPeerQueue *next;
-
- /**
- * DLL previous
- */
- struct MeshPeerQueue *prev;
-
- /**
- * Peer this transmission is directed to.
- */
- struct MeshPeer *peer;
-
- /**
- * Connection this message belongs to.
- */
- struct MeshConnection *c;
-
- /**
- * Is FWD in c?
- */
- int fwd;
-
- /**
- * Channel this message belongs to, if known.
- */
- struct MeshChannel *ch;
-
- /**
- * Pointer to info stucture used as cls.
- */
- void *cls;
-
- /**
- * Type of message
- */
- uint16_t type;
-
- /**
- * Size of the message
- */
- size_t size;
-};
-
-
-/**
- * Struct to encapsulate all the Flow Control information to a peer to which
- * we are directly connected (on a core level).
- */
-struct MeshFlowControl
-{
- /**
- * Connection this controls.
- */
- struct MeshConnection *c;
-
- /**
- * How many messages are in the queue on this connection.
- */
- unsigned int queue_n;
-
- /**
- * How many messages do we accept in the queue.
- */
- unsigned int queue_max;
-
- /**
- * Next ID to use.
- */
- uint32_t next_pid;
-
- /**
- * ID of the last packet sent towards the peer.
- */
- uint32_t last_pid_sent;
-
- /**
- * ID of the last packet received from the peer.
- */
- uint32_t last_pid_recv;
-
- /**
- * Last ACK sent to the peer (peer can't send more than this PID).
- */
- uint32_t last_ack_sent;
-
- /**
- * Last ACK sent towards the origin (for traffic towards leaf node).
- */
- uint32_t last_ack_recv;
-
- /**
- * Task to poll the peer in case of a lost ACK causes stall.
- */
- GNUNET_SCHEDULER_TaskIdentifier poll_task;
-
- /**
- * How frequently to poll for ACKs.
- */
- struct GNUNET_TIME_Relative poll_time;
-};
-
-
-/**
- * Struct containing all information regarding a given peer
- */
-struct MeshPeer
-{
- /**
- * ID of the peer
- */
- GNUNET_PEER_Id id;
-
- /**
- * Last time we heard from this peer
- */
- struct GNUNET_TIME_Absolute last_contact;
-
- /**
- * Paths to reach the peer, ordered by ascending hop count
- */
- struct MeshPeerPath *path_head;
-
- /**
- * Paths to reach the peer, ordered by ascending hop count
- */
- struct MeshPeerPath *path_tail;
-
- /**
- * Handle to stop the DHT search for paths to this peer
- */
- struct GNUNET_DHT_GetHandle *dhtget;
-
- /**
- * Tunnel to this peer, if any.
- */
- struct MeshTunnel2 *tunnel;
-
- /**
- * Connections that go through this peer, indexed by tid;
- */
- struct GNUNET_CONTAINER_MultiHashMap *connections;
-
- /**
- * Handle for queued transmissions
- */
- struct GNUNET_CORE_TransmitHandle *core_transmit;
-
- /**
- * Transmission queue to core DLL head
- */
- struct MeshPeerQueue *queue_head;
-
- /**
- * Transmission queue to core DLL tail
- */
- struct MeshPeerQueue *queue_tail;
-
- /**
- * How many messages are in the queue to this peer.
- */
- unsigned int queue_n;
-};
-
-
-/**
- * Info needed to retry a message in case it gets lost.
- */
-struct MeshReliableMessage
-{
- /**
- * Double linked list, FIFO style
- */
- struct MeshReliableMessage *next;
- struct MeshReliableMessage *prev;
-
- /**
- * Type of message (payload, channel management).
- */
- int16_t type;
-
- /**
- * Tunnel Reliability queue this message is in.
- */
- struct MeshChannelReliability *rel;
-
- /**
- * ID of the message (ACK needed to free)
- */
- uint32_t mid;
-
- /**
- * When was this message issued (to calculate ACK delay)
- */
- struct GNUNET_TIME_Absolute timestamp;
-
- /* struct GNUNET_MESH_Data with payload */
-};
-
-
-struct MeshChannelReliability
-{
- /**
- * Channel this is about.
- */
- struct MeshChannel *ch;
-
- /**
- * DLL of messages sent and not yet ACK'd.
- */
- struct MeshReliableMessage *head_sent;
- struct MeshReliableMessage *tail_sent;
-
- /**
- * Messages pending to send.
- */
- unsigned int n_sent;
-
- /**
- * DLL of messages received out of order.
- */
- struct MeshReliableMessage *head_recv;
- struct MeshReliableMessage *tail_recv;
-
- /**
- * Messages received.
- */
- unsigned int n_recv;
-
- /**
- * Can we send data to the client?
- */
- int client_ready;
-
- /**
- * Task to resend/poll in case no ACK is received.
- */
- GNUNET_SCHEDULER_TaskIdentifier retry_task;
-
- /**
- * Counter for exponential backoff.
- */
- struct GNUNET_TIME_Relative retry_timer;
-
- /**
- * How long does it usually take to get an ACK.
- */
- struct GNUNET_TIME_Relative expected_delay;
-};
-
-
-/**
- * Struct containing all information regarding a channel to a remote client.
- */
-struct MeshChannel
-{
- /**
- * Tunnel this channel is in.
- */
- struct MeshTunnel2 *t;
-
- /**
- * Double linked list.
- */
- struct MeshChannel *next;
- struct MeshChannel *prev;
-
- /**
- * Destination port of the channel.
- */
- uint32_t port;
-
- /**
- * Global channel number ( < GNUNET_MESH_LOCAL_CHANNEL_ID_CLI)
- */
- MESH_ChannelNumber gid;
-
- /**
- * Local tunnel number for root (owner) client.
- * ( >= GNUNET_MESH_LOCAL_CHANNEL_ID_CLI or 0 )
- */
- MESH_ChannelNumber lid_root;
-
- /**
- * Local tunnel number for local destination clients (incoming number)
- * ( >= GNUNET_MESH_LOCAL_CHANNEL_ID_SERV or 0).
- */
- MESH_ChannelNumber lid_dest;
-
- /**
- * Channel state.
- */
- enum MeshChannelState state;
-
- /**
- * Next MID to use for fwd traffic.
- */
- uint32_t mid_send_fwd;
-
- /**
- * Next MID expected for fwd traffic.
- */
- uint32_t mid_recv_fwd;
-
- /**
- * Next MID to use for bck traffic.
- */
- uint32_t mid_send_bck;
-
- /**
- * Next MID expected for bck traffic.
- */
- uint32_t mid_recv_bck;
-
- /**
- * Is the tunnel bufferless (minimum latency)?
- */
- int nobuffer;
-
- /**
- * Is the tunnel reliable?
- */
- int reliable;
-
- /**
- * Last time the channel was used
- */
- struct GNUNET_TIME_Absolute timestamp;
-
- /**
- * Client owner of the tunnel, if any
- */
- struct MeshClient *root;
-
- /**
- * Client destination of the tunnel, if any.
- */
- struct MeshClient *dest;
-
- /**
- * Flag to signal the destruction of the channel.
- * If this is set GNUNET_YES the channel will be destroyed
- * when the queue is empty.
- */
- int destroy;
-
- /**
- * Total messages pending for this channel, payload or not.
- */
- unsigned int pending_messages;
-
- /**
- * Reliability data.
- * Only present (non-NULL) at the owner of a tunnel.
- */
- struct MeshChannelReliability *fwd_rel;
-
- /**
- * Reliability data.
- * Only present (non-NULL) at the destination of a tunnel.
- */
- struct MeshChannelReliability *bck_rel;
-
- /**
- * Is the root prevented from sending more data? (We "owe" him an ACK).
- */
- int blocked_fwd;
-
- /**
- * Is the dest prevented from sending more data? (We "owe" him an ACK).
- */
- int blocked_bck;
-};
-
-
-/**
- * Struct containing all information regarding a connection to a peer.
- */
-struct MeshConnection
-{
- /**
- * DLL
- */
- struct MeshConnection *next;
- struct MeshConnection *prev;
-
- /**
- * Tunnel this connection is part of.
- */
- struct MeshTunnel2 *t;
-
- /**
- * Flow control information for traffic fwd.
- */
- struct MeshFlowControl fwd_fc;
-
- /**
- * Flow control information for traffic bck.
- */
- struct MeshFlowControl bck_fc;
-
- /**
- * Connection number.
- */
- uint32_t id;
-
- /**
- * State of the connection.
- */
- enum MeshConnectionState state;
-
- /**
- * Path being used for the tunnel.
- */
- struct MeshPeerPath *path;
-
- /**
- * Position of the local peer in the path.
- */
- unsigned int own_pos;
-
- /**
- * Task to keep the used paths alive at the owner,
- * time tunnel out on all the other peers.
- */
- 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;
-
- /**
- * Pending message count.
- */
- int pending_messages;
-
- /**
- * Destroy flag: if true, destroy on last message.
- */
- int destroy;
-};
-
-
-/**
- * Struct used to queue messages in a tunnel.
- */
-struct MeshTunnelQueue
-{
- /**
- * DLL
- */
- struct MeshTunnelQueue *next;
- struct MeshTunnelQueue *prev;
-
- /**
- * Channel.
- */
- struct MeshChannel *ch;
-
- /**
- * Message to send.
- */
- /* struct GNUNET_MessageHeader *msg; */
-};
-
-
-/**
- * Struct containing all information regarding a tunnel to a peer.
- */
-struct MeshTunnel2
-{
- /**
- * Endpoint of the tunnel.
- */
- struct MeshPeer *peer;
-
- /**
- * ID of the tunnel.
- */
- struct GNUNET_HashCode id;
-
- /**
- * State of the tunnel.
- */
- enum MeshTunnelState state;
-
- /**
- * Local peer ephemeral private key
- */
- struct GNUNET_CRYPTO_EccPrivateKey *my_eph_key;
-
- /**
- * Local peer ephemeral public key
- */
- struct GNUNET_CRYPTO_EccPublicKey *my_eph;
-
- /**
- * Remote peer's public key.
- */
- struct GNUNET_CRYPTO_EccPublicKey *peers_eph;
-
- /**
- * Encryption ("our") key.
- */
- struct GNUNET_CRYPTO_AesSessionKey e_key;
-
- /**
- * Decryption ("their") key.
- */
- struct GNUNET_CRYPTO_AesSessionKey d_key;
-
- /**
- * Paths that are actively used to reach the destination peer.
- */
- struct MeshConnection *connection_head;
- struct MeshConnection *connection_tail;
-
- /**
- * Next connection number.
- */
- uint32_t next_cid;
-
- /**
- * Channels inside this tunnel.
- */
- struct MeshChannel *channel_head;
- struct MeshChannel *channel_tail;
-
- /**
- * Channel ID for the next created channel.
- */
- MESH_ChannelNumber next_chid;
-
- /**
- * Channel ID for the next incoming channel.
- */
- MESH_ChannelNumber next_local_chid;
-
- /**
- * Pending message count.
- */
- int pending_messages;
-
- /**
- * Destroy flag: if true, destroy on last message.
- */
- int destroy;
-
- /**
- * Queued messages, to transmit once tunnel gets connected.
- */
- struct MeshTunnelQueue *tq_head;
- struct MeshTunnelQueue *tq_tail;
-};
-
-
-
-/**
- * Struct containing information about a client of the service
- *
- * TODO: add a list of 'waiting' ports
- */
-struct MeshClient
-{
- /**
- * Linked list next
- */
- struct MeshClient *next;
-
- /**
- * Linked list prev
- */
- struct MeshClient *prev;
-
- /**
- * Tunnels that belong to this client, indexed by local id
- */
- struct GNUNET_CONTAINER_MultiHashMap32 *own_channels;
-
- /**
- * Tunnels this client has accepted, indexed by incoming local id
- */
- struct GNUNET_CONTAINER_MultiHashMap32 *incoming_channels;
-
- /**
- * Handle to communicate with the client
- */
- struct GNUNET_SERVER_Client *handle;
-
- /**
- * Ports that this client has declared interest in.
- * Indexed by port, contains *Client.
- */
- struct GNUNET_CONTAINER_MultiHashMap32 *ports;
-
- /**
- * Whether the client is active or shutting down (don't send confirmations
- * to a client that is shutting down.
- */
- int shutting_down;
-
- /**
- * ID of the client, mainly for debug messages
- */
- unsigned int id;
-};
-
-
-/******************************************************************************/
-/************************ DEBUG FUNCTIONS ****************************/
-/******************************************************************************/
-
-#if MESH_DEBUG
-/**
- * GNUNET_SCHEDULER_Task for printing a message after some operation is done
- * @param cls string to print
- * @param success GNUNET_OK if the PUT was transmitted,
- * GNUNET_NO on timeout,
- * GNUNET_SYSERR on disconnect from service
- * after the PUT message was transmitted
- * (so we don't know if it was received or not)
- */
-
-#if 0
-static void
-mesh_debug (void *cls, int success)
-{
- char *s = cls;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s (%d)\n", s, success);
-}
-#endif
-
-#endif
-
-/******************************************************************************/
-/*********************** GLOBAL VARIABLES ****************************/
-/******************************************************************************/
-
-/************************** Configuration parameters **************************/
-
-/**
- * How often to send path keepalives. Paths timeout after 4 missed.
- */
-static struct GNUNET_TIME_Relative refresh_connection_time;
-
-/**
- * How often to PUT own ID in the DHT.
- */
-static struct GNUNET_TIME_Relative id_announce_time;
-
-/**
- * Maximum time allowed to connect to a peer found by string.
- */
-static struct GNUNET_TIME_Relative connect_timeout;
-
-/**
- * Default TTL for payload packets.
- */
-static unsigned long long default_ttl;
-
-/**
- * DHT replication level, see DHT API: GNUNET_DHT_get_start, GNUNET_DHT_put.
- */
-static unsigned long long dht_replication_level;
-
-/**
- * How many connections are we willing to maintain.
- * Local connections are always allowed, even if there are more connections than max.
- */
-static unsigned long long max_connections;
-
-/**
- * How many messages *in total* are we willing to queue, divide by number of
- * connections to get connection queue size.
- */
-static unsigned long long max_msgs_queue;
-
-/**
- * How many peers do we want to remember?
- */
-static unsigned long long max_peers;
-
-/**
- * Percentage of messages that will be dropped (for test purposes only).
- */
-static unsigned long long drop_percent;
-
-/*************************** Static global variables **************************/
-
-/**
- * DLL with all the clients, head.
- */
-static struct MeshClient *clients_head;
-
-/**
- * DLL with all the clients, tail.
- */
-static struct MeshClient *clients_tail;
-
-/**
- * Tunnels known, indexed by MESH_TunnelID (MeshTunnel).
- */
-static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
-
-/**
- * Peers known, indexed by PeerIdentity (MeshPeer).
- */
-static struct GNUNET_CONTAINER_MultiHashMap *peers;
-
-/**
- * Handle to communicate with core.
- */
-static struct GNUNET_CORE_Handle *core_handle;
-
-/**
- * Handle to use DHT.
- */
-static struct GNUNET_DHT_Handle *dht_handle;
-
-/**
- * Handle to server lib.
- */
-static struct GNUNET_SERVER_Handle *server_handle;
-
-/**
- * Handle to the statistics service.
- */
-static struct GNUNET_STATISTICS_Handle *stats;
-
-/**
- * Notification context, to send messages to local clients.
- */
-static struct GNUNET_SERVER_NotificationContext *nc;
-
-/**
- * Local peer own ID (memory efficient handle).
- */
-static GNUNET_PEER_Id myid;
-
-/**
- * Local peer own ID (full value).
- */
-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_EccPublicKey my_public_key;
-
-/**
- * All ports clients of this peer have opened.
- */
-static struct GNUNET_CONTAINER_MultiHashMap32 *ports;
-
-/**
- * Task to periodically announce itself in the network.
- */
-GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
-
-/**
- * Next ID to assign to a client.
- */
-unsigned int next_client_id;
-
-
-/******************************************************************************/
-/*********************** DECLARATIONS **************************/
-/******************************************************************************/
-
-/**
- * Function to process paths received for a new peer addition. The recorded
- * paths form the initial tunnel, which can be optimized later.
- * Called on each result obtained for the DHT search.
- *
- * @param cls closure
- * @param exp when will this value expire
- * @param key key of the result
- * @param type type of the result
- * @param size number of bytes in data
- * @param data pointer to the result data
- */
-static void
-dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
- const struct GNUNET_HashCode * key,
- const struct GNUNET_PeerIdentity *get_path,
- unsigned int get_path_length,
- const struct GNUNET_PeerIdentity *put_path,
- unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
- size_t size, const void *data);
-
-
-/**
- * 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);
-
-
-/**
- * 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);
-
-
-/**
- * Build a PeerPath from the paths returned from the DHT, reversing the paths
- * to obtain a local peer -> destination path and interning the peer ids.
- *
- * @return Newly allocated and created path
- */
-static struct MeshPeerPath *
-path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
- unsigned int get_path_length,
- const struct GNUNET_PeerIdentity *put_path,
- unsigned int put_path_length);
-
-
-/**
- * Adds a path to the data structs of all the peers in the path
- *
- * @param p Path to process.
- * @param confirmed Whether we know if the path works or not.
- */
-static void
-path_add_to_peers (struct MeshPeerPath *p, int confirmed);
-
-
-/**
- * Search for a tunnel by global ID using full PeerIdentities.
- *
- * @param t Tunnel containing the channel.
- * @param chid Public channel number.
- *
- * @return channel handler, NULL if doesn't exist
- */
-static struct MeshChannel *
-channel_get (struct MeshTunnel2 *t, MESH_ChannelNumber chid);
-
-
-/**
- * Change the tunnel state.
- *
- * @param t Tunnel whose state to change.
- * @param state New state.
- */
-static void
-tunnel_change_state (struct MeshTunnel2 *t, enum MeshTunnelState state);
-
-
-/**
- * Notify a tunnel that a connection has broken that affects at least
- * some of its peers.
- *
- * @param t Tunnel affected.
- * @param p1 Peer that got disconnected from p2.
- * @param p2 Peer that got disconnected from p1.
- *
- * @return Short ID of the peer disconnected (either p1 or p2).
- * 0 if the tunnel remained unaffected.
- */
-static GNUNET_PEER_Id
-tunnel_notify_connection_broken (struct MeshTunnel2 *t,
- GNUNET_PEER_Id p1, GNUNET_PEER_Id p2);
-
-/**
- * @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.
- *
- * @return Connection created.
- */
-static struct MeshConnection *
-tunnel_use_path (struct MeshTunnel2 *t, struct MeshPeerPath *p);
-
-/**
- * Tunnel is empty: destroy it.
- *
- * Notifies all participants (peers, cleints) about the destruction.
- *
- * @param t Tunnel to destroy.
- */
-static void
-tunnel_destroy_empty (struct MeshTunnel2 *t);
-
-/**
- * Destroy the tunnel.
- *
- * This function does not generate any warning traffic to clients or peers.
- *
- * Tasks:
- * Cancel messages belonging to this tunnel queued to neighbors.
- * Free any allocated resources linked to the tunnel.
- *
- * @param t The tunnel to destroy.
- */
-static void
-tunnel_destroy (struct MeshTunnel2 *t);
-
-/**
- * Create a connection.
- *
- * @param tid Tunnel ID.
- * @param cid Connection ID.
- */
-static struct MeshConnection *
-connection_new (struct GNUNET_HashCode *tid, uint32_t cid);
-
-/**
- * Connection is no longer needed: destroy it and remove from tunnel.
- *
- * @param c Connection to destroy.
- */
-static void
-connection_destroy (struct MeshConnection *c);
-
-/**
- * Send FWD keepalive packets for a connection.
- *
- * @param cls Closure (connection for which to send the keepalive).
- * @param tc Notification context.
- */
-static void
-connection_fwd_keepalive (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc);
-
-/**
- * Send BCK keepalive packets for a connection.
- *
- * @param cls Closure (connection for which to send the keepalive).
- * @param tc Notification context.
- */
-static void
-connection_bck_keepalive (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc);
-
-
-/**
- * Change the tunnel state.
- *
- * @param c Connection whose state to change.
- * @param state New state.
- */
-static void
-connection_change_state (struct MeshConnection* c,
- enum MeshConnectionState state);
-
-
-
-/**
- * @brief Queue and pass message to core when possible.
- *
- * @param cls Closure (@c type dependant). It will be used by queue_send to
- * build the message to be sent if not already prebuilt.
- * @param type Type of the message, 0 for a raw message.
- * @param size Size of the message.
- * @param c Connection this message belongs to (cannot be NULL).
- * @param ch Channel this message belongs to, if applicable (otherwise NULL).
- * @param fwd Is this a message going root->dest? (FWD ACK are NOT FWD!)
- */
-static void
-queue_add (void* cls,
- uint16_t type,
- size_t size,
- struct MeshConnection* c,
- struct MeshChannel* ch,
- int fwd);
-
-
-/**
- * Free a transmission that was already queued with all resources
- * associated to the request.
- *
- * @param queue Queue handler to cancel.
- * @param clear_cls Is it necessary to free associated cls?
- */
-static void
-queue_destroy (struct MeshPeerQueue *queue, int clear_cls);
-
-
-/**
- * Core callback to write a queued packet to core buffer
- *
- * @param cls Closure (peer info).
- * @param size Number of bytes available in buf.
- * @param buf Where the to write the message.
- *
- * @return number of bytes written to buf
- */
-static size_t
-queue_send (void *cls, size_t size, void *buf);
-
-
-/**
- * Dummy function to separate declarations from definitions in function list.
- */
-void
-__mesh_divider______________________________________________________________();
-
-
-/**
- * Get string description for tunnel state.
- *
- * @param s Tunnel state.
- *
- * @return String representation.
- */
-static const char *
-GNUNET_MESH_DEBUG_TS2S (enum MeshTunnelState s)
-{
- static char buf[128];
-
- switch (s)
- {
- case MESH_TUNNEL_NEW:
- return "MESH_TUNNEL_NEW";
- case MESH_TUNNEL_SEARCHING:
- return "MESH_TUNNEL_SEARCHING";
- case MESH_TUNNEL_WAITING:
- return "MESH_TUNNEL_WAITING";
- case MESH_TUNNEL_READY:
- return "MESH_TUNNEL_READY";
- case MESH_TUNNEL_RECONNECTING:
- return "MESH_TUNNEL_RECONNECTING";
-
- default:
- sprintf (buf, "%u (UNKNOWN STATE)", s);
- return buf;
- }
-}
-
-
-/**
- * Get string description for tunnel state.
- *
- * @param s Tunnel state.
- *
- * @return String representation.
- */
-static const char *
-GNUNET_MESH_DEBUG_CS2S (enum MeshTunnelState s)
-{
- switch (s)
- {
- case MESH_CONNECTION_NEW:
- return "MESH_CONNECTION_NEW";
- case MESH_CONNECTION_SENT:
- return "MESH_CONNECTION_SENT";
- case MESH_CONNECTION_READY:
- return "MESH_CONNECTION_READY";
- default:
- return "MESH_CONNECTION_STATE_ERROR";
- }
-}
-
-
-
-/******************************************************************************/
-/************************ PERIODIC FUNCTIONS ****************************/
-/******************************************************************************/
-
-/**
- * Periodically announce self id in the DHT
- *
- * @param cls closure
- * @param tc task context
- */
-static void
-announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct PBlock block;
-
- if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
- {
- announce_id_task = GNUNET_SCHEDULER_NO_TASK;
- return;
- }
- /* TODO
- * - Set data expiration in function of X
- * - Adapt X to churn
- */
- DEBUG_DHT ("DHT_put for ID %s started.\n", GNUNET_i2s (&my_full_id));
-
- block.id = my_full_id;
- GNUNET_DHT_put (dht_handle, /* DHT handle */
- &my_full_id.hashPubKey, /* Key to use */
- dht_replication_level, /* Replication level */
- GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
- GNUNET_BLOCK_TYPE_MESH_PEER, /* Block type */
- sizeof (block), /* Size of the data */
- (const char *) &block, /* Data itself */
- GNUNET_TIME_UNIT_FOREVER_ABS, /* Data expiration */
- GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
- NULL, /* Continuation */
- NULL); /* Continuation closure */
- announce_id_task =
- GNUNET_SCHEDULER_add_delayed (id_announce_time, &announce_id, cls);
-}
-
-
-/******************************************************************************/
-/****************** GENERAL HELPER FUNCTIONS ************************/
-/******************************************************************************/
-
-
-/**
- * Get the static string for a peer ID.
- *
- * @param peer Peer.
- *
- * @return Static string for it's ID.
- */
-static const char *
-peer2s (const struct MeshPeer *peer)
-{
- if (NULL == peer)
- return "(NULL)";
- return GNUNET_i2s (GNUNET_PEER_resolve2 (peer->id));
-}
-
-
-/**
- * Get the previous hop in a connection
- *
- * @param c Connection.
- *
- * @return Previous peer in the connection.
- */
-static struct MeshPeer *
-connection_get_prev_hop (struct MeshConnection *c)
-{
- GNUNET_PEER_Id id;
-
- if (0 == c->own_pos || c->path->length < 2)
- id = c->path->peers[0];
- else
- id = c->path->peers[c->own_pos - 1];
-
- return peer_get_short (id);
-}
-
-
-/**
- * Get the next hop in a connection
- *
- * @param c Connection.
- *
- * @return Next peer in the connection.
- */
-static struct MeshPeer *
-connection_get_next_hop (struct MeshConnection *c)
-{
- GNUNET_PEER_Id id;
-
- if ((c->path->length - 1) == c->own_pos || c->path->length < 2)
- id = c->path->peers[c->path->length - 1];
- else
- id = c->path->peers[c->own_pos + 1];
-
- return peer_get_short (id);
-}
-
-
-/**
- * Get the hop in a connection.
- *
- * @param c Connection.
- * @param fwd Next hop?
- *
- * @return Next peer in the connection.
- */
-static struct MeshPeer *
-connection_get_hop (struct MeshConnection *c, int fwd)
-{
- if (fwd)
- return connection_get_next_hop (c);
- return connection_get_prev_hop (c);
-}
-
-/**
- * Check if client has registered with the service and has not disconnected
- *
- * @param client the client to check
- *
- * @return non-NULL if client exists in the global DLL
- */
-static struct MeshClient *
-client_get (struct GNUNET_SERVER_Client *client)
-{
- return GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
-}
-
-
-/**
- * Deletes a tunnel from a client (either owner or destination).
- *
- * @param c Client whose tunnel to delete.
- * @param ch Channel which should be deleted.
- */
-static void
-client_delete_channel (struct MeshClient *c, struct MeshChannel *ch)
-{
- int res;
-
- if (c == ch->root)
- {
- res = GNUNET_CONTAINER_multihashmap32_remove (c->own_channels,
- ch->lid_root, ch);
- if (GNUNET_YES != res)
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client_delete_channel owner KO\n");
- }
- if (c == ch->dest)
- {
- res = GNUNET_CONTAINER_multihashmap32_remove (c->incoming_channels,
- ch->lid_dest, ch);
- if (GNUNET_YES != res)
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client_delete_tunnel client KO\n");
- }
-}
-
-
-/**
- * Notify the appropriate client that a new incoming channel was created.
- *
- * @param ch Channel that was created.
- */
-static void
-send_local_channel_create (struct MeshChannel *ch)
-{
- struct GNUNET_MESH_ChannelMessage msg;
- struct MeshTunnel2 *t = ch->t;
-
- if (NULL == ch->dest)
- return;
- msg.header.size = htons (sizeof (msg));
- msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
- msg.channel_id = htonl (ch->lid_dest);
- msg.port = htonl (ch->port);
- msg.opt = 0;
- msg.opt |= GNUNET_YES == ch->reliable ? GNUNET_MESH_OPTION_RELIABLE : 0;
- msg.opt |= GNUNET_YES == ch->nobuffer ? GNUNET_MESH_OPTION_NOBUFFER : 0;
- msg.opt = htonl (msg.opt);
- GNUNET_PEER_resolve (t->peer->id, &msg.peer);
- GNUNET_SERVER_notification_context_unicast (nc, ch->dest->handle,
- &msg.header, GNUNET_NO);
-}
-
-
-/**
- * Notify a client that the incoming tunnel is no longer valid.
- *
- * @param ch Channel that is destroyed.
- * @param fwd Forward notification (owner->dest)?
- */
-static void
-send_local_channel_destroy (struct MeshChannel *ch, int fwd)
-{
- struct GNUNET_MESH_ChannelMessage msg;
- struct MeshClient *c;
-
- c = fwd ? ch->dest : ch->root;
- if (NULL == c)
- {
- GNUNET_break (0);
- return;
- }
- msg.header.size = htons (sizeof (msg));
- msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
- msg.channel_id = htonl (fwd ? ch->lid_dest : ch->lid_root);
- msg.port = htonl (0);
- memset (&msg.peer, 0, sizeof (msg.peer));
- msg.opt = htonl (0);
- GNUNET_SERVER_notification_context_unicast (nc, c->handle,
- &msg.header, GNUNET_NO);
-}
-
-
-/**
- * Build a local ACK message and send it to a local client.
- *
- * @param ch Channel on which to send the ACK.
- * @param c Client to whom send the ACK.
- * @param fwd Set to GNUNET_YES for FWD ACK (dest->owner)
- */
-static void
-send_local_ack (struct MeshChannel *ch,
- struct MeshClient *c,
- int fwd)
-{
- struct GNUNET_MESH_LocalAck msg;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "send local %s ack on %s:%X towards %p\n",
- fwd ? "FWD" : "BCK", GNUNET_h2s (&ch->t->id), ch->gid, c);
-
- if (NULL == c
- || ( fwd && (0 == ch->lid_root || c != ch->root))
- || (!fwd && (0 == ch->lid_dest || c != ch->dest)) )
- {
- GNUNET_break (0);
- return;
- }
- msg.header.size = htons (sizeof (msg));
- msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
- msg.channel_id = htonl (fwd ? ch->lid_root : ch->lid_dest);
- GNUNET_SERVER_notification_context_unicast (nc,
- c->handle,
- &msg.header,
- GNUNET_NO);
- if (fwd)
- ch->blocked_fwd = GNUNET_NO;
- else
- ch->blocked_bck = GNUNET_NO;
-}
-
-
-/**
- * Count established (ready) connections of a tunnel.
- *
- * @param t Tunnel on which to send the message.
- *
- * @return Number of connections.
- */
-static unsigned int
-tunnel_count_connections (struct MeshTunnel2 *t)
-{
- struct MeshConnection *c;
- unsigned int i;
-
- for (c = t->connection_head, i = 0; NULL != c; c = c->next, i++);
-
- return i;
-}
-
-
-/**
- * Pick a connection on which send the next data message.
- *
- * @param t Tunnel on which to send the message.
- * @param fwd Is this a fwd message?
- *
- * @return The connection on which to send the next message.
- */
-static struct MeshConnection *
-tunnel_get_connection (struct MeshTunnel2 *t, int fwd)
-{
- struct MeshConnection *c;
- struct MeshConnection *best;
- struct MeshFlowControl *fc;
- unsigned int lowest_q;
-
- best = NULL;
- lowest_q = UINT_MAX;
- for (c = t->connection_head; NULL != c; c = c->next)
- {
- if (MESH_CONNECTION_READY == c->state)
- {
- fc = fwd ? &c->fwd_fc : &c->bck_fc;
- if (NULL == fc)
- {
- GNUNET_break (0);
- continue;
- }
- if (fc->queue_n < lowest_q)
- {
- best = c;
- lowest_q = fc->queue_n;
- }
- }
- }
- return best;
-}
-
-
-/**
- * Get the total buffer space for a tunnel.
- */
-static unsigned int
-tunnel_get_buffer (struct MeshTunnel2 *t, int fwd)
-{
- struct MeshConnection *c;
- struct MeshFlowControl *fc;
- unsigned int buffer;
-
- for (buffer = 0, c = t->connection_head; NULL != c; c = c->next)
- {
- if (c->state != MESH_CONNECTION_READY)
- continue;
-
- fc = fwd ? &c->fwd_fc : &c->bck_fc;
- buffer += fc->last_ack_recv - fc->last_pid_sent;
- }
-
- return buffer;
-}
-
-
-/**
- * FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME
- * Encrypt data with the tunnel key.
- *
- * @param t Tunnel whose key to use.
- * @param dst Destination for the encrypted data.
- * @param src Source of the plaintext.
- * @param size Size of the plaintext.
- * @param iv Initialization Vector to use.
- * @param fwd Is this a fwd message?
- */
-static void
-tunnel_encrypt (struct MeshTunnel2 *t,
- void *dst, const void *src,
- size_t size, uint64_t iv, int fwd)
-{
- memcpy (dst, src, size);
-}
-
-
-/**
- * FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME
- * Decrypt data with the tunnel key.
- *
- * @param t Tunnel whose key to use.
- * @param dst Destination for the plaintext.
- * @param src Source of the encrypted data.
- * @param size Size of the encrypted data.
- * @param iv Initialization Vector to use.
- * @param fwd Is this a fwd message?
- */
-static void
-tunnel_decrypt (struct MeshTunnel2 *t,
- void *dst, const void *src,
- size_t size, uint64_t iv, int fwd)
-{
- memcpy (dst, src, size);
-}
-
-
-/**
- * Sends an already built message on a connection, properly registering
- * all used resources.
- *
- * @param message Message to send. Function makes a copy of it.
- * If message is not hop-by-hop, decrements TTL of copy.
- * @param c Connection on which this message is transmitted.
- * @param ch Channel on which this message is transmitted, or NULL.
- * @param fwd Is this a fwd message?
- */
-static void
-send_prebuilt_message_connection (const struct GNUNET_MessageHeader *message,
- struct MeshConnection *c,
- struct MeshChannel *ch,
- int fwd)
-{
- void *data;
- size_t size;
- uint16_t type;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Send on Connection %s[%X]\n",
- GNUNET_h2s (&c->t->id), c->id);
-
- size = ntohs (message->size);
- data = GNUNET_malloc (size);
- memcpy (data, message, size);
- type = ntohs (message->type);
-
- switch (type)
- {
- struct GNUNET_MESH_Encrypted *emsg;
- struct GNUNET_MESH_ACK *amsg;
- struct GNUNET_MESH_Poll *pmsg;
- uint32_t ttl;
-
- case GNUNET_MESSAGE_TYPE_MESH_FWD:
- case GNUNET_MESSAGE_TYPE_MESH_BCK:
- emsg = (struct GNUNET_MESH_Encrypted *) data;
- ttl = ntohl (emsg->ttl);
- if (0 == ttl)
- {
- GNUNET_break_op (0);
- return;
- }
- emsg->tid = c->t->id;
- emsg->cid = htonl (c->id);
- emsg->ttl = htonl (ttl - 1);
- emsg->pid = htonl (fwd ? c->fwd_fc.next_pid++ : c->bck_fc.next_pid++);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " pid %u\n", ntohl (emsg->pid));
- break;
-
- case GNUNET_MESSAGE_TYPE_MESH_ACK:
- amsg = (struct GNUNET_MESH_ACK *) data;
- amsg->tid = c->t->id;
- amsg->cid = htonl (c->id);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ntohl (amsg->ack));
- break;
-
- case GNUNET_MESSAGE_TYPE_MESH_POLL:
- pmsg = (struct GNUNET_MESH_Poll *) data;
- pmsg->tid = c->t->id;
- pmsg->cid = htonl (c->id);
- pmsg->pid = htonl (fwd ? c->fwd_fc.last_pid_sent : c->bck_fc.last_pid_sent);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " poll %u\n", ntohl (pmsg->pid));
- break;
-
- default:
- GNUNET_break (0);
- }
-
- queue_add (data,
- type,
- size,
- c,
- ch,
- fwd);
-}
-
-
-/**
- * Sends an already built message on a tunnel, choosing the best connection.
- *
- * @param message Message to send. Function modifies it.
- * @param t Tunnel on which this message is transmitted.
- * @param ch Channel on which this message is transmitted.
- * @param fwd Is this a fwd message?
- */
-static void
-send_prebuilt_message_tunnel (struct GNUNET_MESH_Encrypted *msg,
- struct MeshTunnel2 *t,
- struct MeshChannel *ch,
- int fwd)
-{
- struct MeshConnection *c;
- uint16_t type;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Send on Tunnel %s\n",
- GNUNET_h2s (&t->id));
- c = tunnel_get_connection (t, fwd);
- if (NULL == c)
- {
- GNUNET_break (GNUNET_YES == t->destroy);
- return;
- }
- type = ntohs (msg->header.type);
- switch (type)
- {
- case GNUNET_MESSAGE_TYPE_MESH_FWD:
- case GNUNET_MESSAGE_TYPE_MESH_BCK:
- case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE:
- case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_DESTROY:
- msg->cid = htonl (c->id);
- msg->tid = t->id;
- msg->ttl = htonl (default_ttl);
- break;
- default:
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "unkown type %s\n",
- GNUNET_MESH_DEBUG_M2S (type));
- GNUNET_break (0);
- }
-
- send_prebuilt_message_connection (&msg->header, c, ch, fwd);
-}
-
-
-/**
- * Sends an already built message on a channel, properly registering
- * all used resources and encrypting the message with the tunnel's key.
- *
- * @param message Message to send. Function makes a copy of it.
- * @param ch Channel on which this message is transmitted.
- * @param fwd Is this a fwd message?
- */
-static void
-send_prebuilt_message_channel (const struct GNUNET_MessageHeader *message,
- struct MeshChannel *ch,
- int fwd)
-{
- struct GNUNET_MESH_Encrypted *msg;
- size_t size = ntohs (message->size);
- char *cbuf[sizeof (struct GNUNET_MESH_Encrypted) + size];
- uint16_t type;
- uint64_t iv;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Send on Channel %s:%X\n",
- GNUNET_h2s (&ch->t->id), ch->gid);
- type = fwd ? GNUNET_MESSAGE_TYPE_MESH_FWD : GNUNET_MESSAGE_TYPE_MESH_BCK;
- iv = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_NONCE, UINT64_MAX);
-
- msg = (struct GNUNET_MESH_Encrypted *) cbuf;
- msg->header.type = htons (type);
- msg->header.size = htons (sizeof (struct GNUNET_MESH_Encrypted) + size);
- msg->iv = GNUNET_htonll (iv);
- tunnel_encrypt (ch->t, &msg[1], message, size, iv, fwd);
-
- send_prebuilt_message_tunnel (msg, ch->t, ch, fwd);
-}
-
-
-/**
- * Sends a CREATE CONNECTION message for a path to a peer.
- * Changes the connection and tunnel states if necessary.
- *
- * @param connection Connection to create.
- */
-static void
-send_connection_create (struct MeshConnection *connection)
-{
- struct MeshTunnel2 *t;
-
- t = connection->t;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Send connection create\n");
- queue_add (NULL,
- GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE,
- sizeof (struct GNUNET_MESH_ConnectionCreate) +
- (connection->path->length *
- sizeof (struct GNUNET_PeerIdentity)),
- connection,
- NULL,
- GNUNET_YES);
- if (MESH_TUNNEL_SEARCHING == t->state || MESH_TUNNEL_NEW == t->state)
- tunnel_change_state (t, MESH_TUNNEL_WAITING);
- if (MESH_CONNECTION_NEW == connection->state)
- connection_change_state (connection, MESH_CONNECTION_SENT);
-}
-
-
-/**
- * Sends a CONNECTION ACK message in reponse to a received CONNECTION_CREATE
- * directed to us.
- *
- * @param connection Connection to confirm.
- * @param fwd Is this a fwd ACK? (First is bck (SYNACK), second is fwd (ACK))
- */
-static void
-send_connection_ack (struct MeshConnection *connection, int fwd)
-{
- struct MeshTunnel2 *t;
-
- t = connection->t;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Send connection ack\n");
- queue_add (NULL,
- GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK,
- sizeof (struct GNUNET_MESH_ConnectionACK),
- connection,
- NULL,
- fwd);
- if (MESH_TUNNEL_NEW == t->state)
- tunnel_change_state (t, MESH_TUNNEL_WAITING);
-}
-
-
-/**
- * Build a hop-by-hop ACK message and queue it to send for the given connection.
- *
- * @param c Which connection to send the hop-by-hop ACK.
- * @param ack Value of the ACK.
- * @param fwd Is this fwd?
- */
-static void
-send_ack (struct MeshConnection *c, uint32_t ack, int fwd)
-{
- struct GNUNET_MESH_ACK msg;
-
- msg.header.size = htons (sizeof (msg));
- msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
- msg.ack = htonl (ack);
- msg.tid = c->t->id;
- msg.cid = htonl (c->id);
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "connection send %s ack %u on %s[%X]\n",
- fwd ? "FWD" : "BCK", ack, GNUNET_h2s (&c->t->id), c->id);
-
- send_prebuilt_message_connection (&msg.header, c, NULL, fwd);
-}
-
-
-/**
- * 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 connection message to a peer.
- *
- * @param c Connection to create.
- * @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_connection_create (struct MeshConnection *c, size_t size, void *buf)
-{
- struct GNUNET_MESH_ConnectionCreate *msg;
- struct GNUNET_PeerIdentity *peer_ptr;
- struct MeshPeerPath *p = c->path;
- size_t size_needed;
- int i;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending CONNECTION CREATE...\n");
- size_needed =
- sizeof (struct GNUNET_MESH_ConnectionCreate) +
- p->length * sizeof (struct GNUNET_PeerIdentity);
-
- if (size < size_needed || NULL == buf)
- {
- GNUNET_break (0);
- return 0;
- }
- msg = (struct GNUNET_MESH_ConnectionCreate *) buf;
- msg->header.size = htons (size_needed);
- msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE);
- msg->cid = htonl (c->id);
- msg->tid = c->t->id;
-
- 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,
- "CONNECTION CREATE (%u bytes long) sent!\n", size_needed);
- return size_needed;
-}
-
-
-/**
- * Creates a path ack message in buf and frees all unused resources.
- *
- * @param c Connection to send an ACK on.
- * @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_connection_ack (struct MeshConnection *c, size_t size, void *buf)
-{
- struct GNUNET_MESH_ConnectionACK *msg = buf;
- struct MeshTunnel2 *t = c->t;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending CONNECTION ACK...\n");
- GNUNET_assert (NULL != t);
- if (sizeof (struct GNUNET_MESH_ConnectionACK) > size)
- {
- GNUNET_break (0);
- return 0;
- }
- msg->header.size = htons (sizeof (struct GNUNET_MESH_ConnectionACK));
- msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK);
- msg->cid = htonl (c->id);
- msg->tid = t->id;
-
- /* TODO add signature */
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CONNECTION ACK sent!\n");
- return sizeof (struct GNUNET_MESH_ConnectionACK);
-}
-
-
-/**
- * Destroy the peer_info and free any allocated resources linked to it
- *
- * @param peer The peer_info to destroy.
- *
- * @return GNUNET_OK on success
- */
-static int
-peer_destroy (struct MeshPeer *peer)
-{
- struct GNUNET_PeerIdentity id;
- struct MeshPeerPath *p;
- struct MeshPeerPath *nextp;
-
- GNUNET_PEER_resolve (peer->id, &id);
- GNUNET_PEER_change_rc (peer->id, -1);
-
- if (GNUNET_YES !=
- GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, peer))
- {
- GNUNET_break (0);
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
- }
- if (NULL != peer->dhtget)
- {
- GNUNET_DHT_get_stop (peer->dhtget);
- }
- p = peer->path_head;
- while (NULL != p)
- {
- nextp = p->next;
- GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
- path_destroy (p);
- p = nextp;
- }
- tunnel_destroy_empty (peer->tunnel);
- GNUNET_free (peer);
- return GNUNET_OK;
-}
-
-
-/**
- * Returns if peer is used (has a tunnel, is neighbor).
- *
- * @peer Peer to check.
- *
- * @return GNUNET_YES if peer is in use.
- */
-static int
-peer_is_used (struct MeshPeer *peer)
-{
- struct MeshPeerPath *p;
-
- if (NULL != peer->tunnel)
- return GNUNET_YES;
-
- for (p = peer->path_head; NULL != p; p = p->next)
- {
- if (p->length < 3)
- return GNUNET_YES;
- }
- return GNUNET_NO;
-}
-
-/**
- * Iterator over all the peers to get the oldest timestamp.
- *
- * @param cls Closure (unsued).
- * @param key ID of the peer.
- * @param value Peer_Info of the peer.
- */
-static int
-peer_get_oldest (void *cls,
- const struct GNUNET_HashCode *key,
- void *value)
-{
- struct MeshPeer *p = value;
- struct GNUNET_TIME_Absolute *abs = cls;
-
- /* Don't count active peers */
- if (GNUNET_YES == peer_is_used (p))
- return GNUNET_YES;
-
- if (abs->abs_value_us < p->last_contact.abs_value_us)
- abs->abs_value_us = p->last_contact.abs_value_us;
-
- return GNUNET_YES;
-}
-
-
-/**
- * Iterator over all the peers to remove the oldest entry.
- *
- * @param cls Closure (unsued).
- * @param key ID of the peer.
- * @param value Peer_Info of the peer.
- */
-static int
-peer_timeout (void *cls,
- const struct GNUNET_HashCode *key,
- void *value)
-{
- struct MeshPeer *p = value;
- struct GNUNET_TIME_Absolute *abs = cls;
-
- if (p->last_contact.abs_value_us == abs->abs_value_us &&
- GNUNET_NO == peer_is_used (p))
- {
- peer_destroy (p);
- return GNUNET_NO;
- }
- return GNUNET_YES;
-}
-
-
-/**
- * Delete oldest unused peer.
- */
-static void
-peer_delete_oldest (void)
-{
- struct GNUNET_TIME_Absolute abs;
-
- abs = GNUNET_TIME_UNIT_FOREVER_ABS;
-
- GNUNET_CONTAINER_multihashmap_iterate (peers,
- &peer_get_oldest,
- &abs);
- GNUNET_CONTAINER_multihashmap_iterate (peers,
- &peer_timeout,
- &abs);
-}
-
-
-/**
- * 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_multihashmap_get (peers, &peer_id->hashPubKey);
- if (NULL == peer)
- {
- peer = GNUNET_new (struct MeshPeer);
- if (GNUNET_CONTAINER_multihashmap_size (peers) > max_peers)
- {
- peer_delete_oldest ();
- }
- GNUNET_CONTAINER_multihashmap_put (peers, &peer_id->hashPubKey, 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));
-}
-
-
-/**
- * Get a cost of a path for a peer considering existing tunnel connections.
- *
- * @param peer Peer towards which the path is considered.
- * @param path Candidate path.
- *
- * @return Cost of the path (path length + number of overlapping nodes)
- */
-static unsigned int
-peer_get_path_cost (const struct MeshPeer *peer,
- const struct MeshPeerPath *path)
-{
- struct MeshConnection *c;
- unsigned int overlap;
- unsigned int i;
- unsigned int j;
-
- if (NULL == path)
- return 0;
-
- overlap = 0;
- GNUNET_assert (NULL != peer->tunnel);
-
- for (i = 0; i < path->length; i++)
- {
- for (c = peer->tunnel->connection_head; NULL != c; c = c->next)
- {
- for (j = 0; j < c->path->length; j++)
- {
- if (path->peers[i] == c->path->peers[j])
- {
- overlap++;
- break;
- }
- }
- }
- }
- return (path->length + overlap) * (path->score * -1);
-}
-
-
-/**
- * Choose the best path towards a peer considering the tunnel properties.
- *
- * @param peer The destination peer.
- *
- * @return Best current known path towards the peer, if any.
- */
-static struct MeshPeerPath *
-peer_get_best_path (const struct MeshPeer *peer)
-{
- struct MeshPeerPath *best_p;
- struct MeshPeerPath *p;
- struct MeshConnection *c;
- unsigned int best_cost;
- unsigned int cost;
-
- best_cost = UINT_MAX;
- best_p = NULL;
- for (p = peer->path_head; NULL != p; p = p->next)
- {
- for (c = peer->tunnel->connection_head; NULL != c; c = c->next)
- if (c->path == p)
- break;
- if (NULL != c)
- continue; /* If path is in use in a connection, skip it. */
-
- if ((cost = peer_get_path_cost (peer, p)) < best_cost)
- {
- best_cost = cost;
- best_p = p;
- }
- }
- return best_p;
-}
-
-static int
-queue_is_sendable (struct MeshPeerQueue *q)
-{
- struct MeshFlowControl *fc;
-
- /* Is PID-independent? */
- switch (q->type)
- {
- case GNUNET_MESSAGE_TYPE_MESH_ACK:
- case GNUNET_MESSAGE_TYPE_MESH_POLL:
- return GNUNET_YES;
- }
-
- /* Is PID allowed? */
- fc = q->fwd ? &q->c->fwd_fc : &q->c->bck_fc;
- if (GMC_is_pid_bigger (fc->last_ack_recv, fc->last_pid_sent))
- return GNUNET_YES;
-
- return GNUNET_NO;
-}
-
-
-/**
- * Get first sendable message.
- *
- * @param peer The destination peer.
- *
- * @return Best current known path towards the peer, if any.
- */
-static struct MeshPeerQueue *
-peer_get_first_message (const struct MeshPeer *peer)
-{
- struct MeshPeerQueue *q;
-
- for (q = peer->queue_head; NULL != q; q = q->next)
- {
- if (queue_is_sendable (q))
- return q;
- }
-
- return NULL;
-}
-
-
-/**
- * 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 CONNECTION towards it.
- *
- * @param peer PeerInfo of the peer.
- */
-static void
-peer_connect (struct MeshPeer *peer)
-{
- struct MeshTunnel2 *t;
- struct MeshPeerPath *p;
- struct MeshConnection *c;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "peer_connect towards %s\n",
- peer2s (peer));
- t = peer->tunnel;
- if (NULL != peer->path_head)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "path exists\n");
- p = peer_get_best_path (peer);
- if (NULL != p)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u hops\n", p->length);
- c = tunnel_use_path (t, p);
- send_connection_create (c);
- }
- }
- else if (NULL == peer->dhtget)
- {
- const struct GNUNET_PeerIdentity *id;
-
- id = GNUNET_PEER_resolve2 (peer->id);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " Starting DHT GET for peer %s\n", peer2s (peer));
- 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 */
- 0, /* xquery bits */
- &dht_get_id_handler, peer);
- if (MESH_TUNNEL_NEW == t->state)
- tunnel_change_state (t, MESH_TUNNEL_SEARCHING);
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "There is no path but the DHT GET is already started.\n");
- }
-}
-
-
-/**
- * Get the first transmittable message for a connection.
- *
- * @param c Connection.
- * @param fwd Is this FWD?
- *
- * @return First transmittable message.
- */
-static struct MeshPeerQueue *
-connection_get_first_message (struct MeshConnection *c, int fwd)
-{
- struct MeshPeerQueue *q;
- struct MeshPeer *p;
-
- p = connection_get_hop (c, fwd);
-
- for (q = p->queue_head; NULL != q; q = q->next)
- {
- if (q->c != c)
- continue;
- if (queue_is_sendable (q))
- return q;
- }
-
- return NULL;
-}
-
-
-/**
- * Is this peer the first one on the connection?
- *
- * @param c Connection.
- * @param fwd Is this about fwd traffic?
- *
- * @return GNUNET_YES if origin, GNUNET_NO if relay/terminal.
- */
-static int
-connection_is_origin (struct MeshConnection *c, int fwd)
-{
- if (!fwd && c->own_pos == c->path->length - 1)
- return GNUNET_YES;
- if (fwd && c->own_pos == 0)
- return GNUNET_YES;
- return GNUNET_NO;
-}
-
-
-/**
- * Is this peer the last one on the connection?
- *
- * @param c Connection.
- * @param fwd Is this about fwd traffic?
- * Note that the ROOT is the terminal for BCK traffic!
- *
- * @return GNUNET_YES if terminal, GNUNET_NO if relay/origin.
- */
-static int
-connection_is_terminal (struct MeshConnection *c, int fwd)
-{
- if (fwd && c->own_pos == c->path->length - 1)
- return GNUNET_YES;
- if (!fwd && c->own_pos == 0)
- return GNUNET_YES;
- return GNUNET_NO;
-}
-
-
-/**
- * @brief Re-initiate traffic on this connection 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 c Connection on which initiate traffic.
- * @param fwd Is this about fwd traffic?
- */
-static void
-connection_unlock_queue (struct MeshConnection *c, int fwd)
-{
- struct MeshPeer *peer;
- struct MeshPeerQueue *q;
- size_t size;
-
- peer = connection_get_hop (c, fwd);
-
- if (NULL != peer->core_transmit)
- return; /* Already unlocked */
-
- q = connection_get_first_message (c, fwd);
- if (NULL == q)
- return; /* Nothing to transmit */
-
- 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 that belong to a certain connection.
- *
- * @param c Connection which to cancel.
- * @param fwd Cancel fwd traffic?
- */
-static void
-connection_cancel_queues (struct MeshConnection *c, int fwd)
-{
- struct MeshPeerQueue *q;
- struct MeshPeerQueue *next;
- struct MeshFlowControl *fc;
- struct MeshPeer *peer;
-
- if (NULL == c)
- {
- GNUNET_break (0);
- return;
- }
- fc = fwd ? &c->fwd_fc : &c->bck_fc;
- peer = connection_get_hop (c, fwd);
-
- for (q = peer->queue_head; NULL != q; q = next)
- {
- next = q->next;
- if (q->c == c)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "connection_cancel_queue %s\n",
- GNUNET_MESH_DEBUG_M2S (q->type));
- queue_destroy (q, GNUNET_YES);
- }
- }
- if (NULL == peer->queue_head)
- {
- if (NULL != peer->core_transmit)
- {
- GNUNET_CORE_notify_transmit_ready_cancel (peer->core_transmit);
- peer->core_transmit = NULL;
- }
- if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task)
- {
- GNUNET_SCHEDULER_cancel (fc->poll_task);
- fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
- }
- }
-}
-
-
-/**
- * Remove all paths that rely on a direct connection between p1 and p2
- * from the peer itself and notify all tunnels about it.
- *
- * @param peer PeerInfo of affected peer.
- * @param p1 GNUNET_PEER_Id of one peer.
- * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
- * no longer is.
- *
- * TODO: optimize (see below)
- */
-static void
-peer_remove_path (struct MeshPeer *peer, GNUNET_PEER_Id p1,
- GNUNET_PEER_Id p2)
-{
- struct MeshPeerPath *p;
- struct MeshPeerPath *next;
- struct MeshPeer *peer_d;
- GNUNET_PEER_Id d;
- unsigned int destroyed;
- unsigned int i;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
- destroyed = 0;
- for (p = peer->path_head; NULL != p; p = next)
- {
- next = p->next;
- for (i = 0; i < (p->length - 1); i++)
- {
- if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
- (p->peers[i] == p2 && p->peers[i + 1] == p1))
- {
- GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
- path_destroy (p);
- destroyed++;
- break;
- }
- }
- }
- if (0 == destroyed)
- return;
-
-
- d = tunnel_notify_connection_broken (peer->tunnel, p1, p2);
-
- peer_d = peer_get_short (d); // FIXME
- next = peer_get_best_path (peer_d);
- tunnel_use_path (peer->tunnel, next);
- peer_connect (peer_d);
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
-}
-
-
-/**
- * Add the path to the peer and update the path used to reach it in case this
- * is the shortest.
- *
- * @param peer_info Destination peer to add the path to.
- * @param path New path to add. Last peer must be the peer in arg 1.
- * Path will be either used of freed if already known.
- * @param trusted Do we trust that this path is real?
- */
-void
-peer_add_path (struct MeshPeer *peer_info, struct MeshPeerPath *path,
- int trusted)
-{
- struct MeshPeerPath *aux;
- unsigned int l;
- unsigned int l2;
-
- if ((NULL == peer_info) || (NULL == path))
- {
- GNUNET_break (0);
- path_destroy (path);
- return;
- }
- if (path->peers[path->length - 1] != peer_info->id)
- {
- GNUNET_break (0);
- path_destroy (path);
- return;
- }
- if (2 >= path->length && GNUNET_NO == trusted)
- {
- /* Only allow CORE to tell us about direct paths */
- path_destroy (path);
- return;
- }
- for (l = 1; l < path->length; l++)
- {
- if (path->peers[l] == myid)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
- for (l2 = 0; l2 < path->length - l; l2++)
- {
- path->peers[l2] = path->peers[l + l2];
- }
- path->length -= l;
- l = 1;
- path->peers =
- GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
- }
- }
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
- path->length, peer2s (peer_info));
-
- l = path_get_length (path);
- if (0 == l)
- {
- path_destroy (path);
- return;
- }
-
- GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
- for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
- {
- l2 = path_get_length (aux);
- if (l2 > l)
- {
- GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
- peer_info->path_tail, aux, path);
- return;
- }
- else
- {
- if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
- {
- path_destroy (path);
- return;
- }
- }
- }
- GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
- path);
- return;
-}
-
-
-/**
- * Add the path to the origin peer and update the path used to reach it in case
- * this is the shortest.
- * The path is given in peer_info -> destination, therefore we turn the path
- * upside down first.
- *
- * @param peer_info Peer to add the path to, being the origin of the path.
- * @param path New path to add after being inversed.
- * Path will be either used or freed.
- * @param trusted Do we trust that this path is real?
- */
-static void
-peer_add_path_to_origin (struct MeshPeer *peer_info,
- struct MeshPeerPath *path, int trusted)
-{
- path_invert (path);
- peer_add_path (peer_info, path, trusted);
-}
-
-
-
-/**
- * Function called if a connection has been stalled for a while,
- * possibly due to a missed ACK. Poll the neighbor about its ACK status.
- *
- * @param cls Closure (poll ctx).
- * @param tc TaskContext.
- */
-static void
-connection_poll (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct MeshFlowControl *fc = cls;
- struct GNUNET_MESH_Poll msg;
- struct MeshConnection *c;
-
- fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
- if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
- {
- return;
- }
-
- c = fc->c;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** Polling!\n");
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** connection %s[%X]\n",
- peer2s (c->t->peer), c->id);
-
- msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_POLL);
- msg.header.size = htons (sizeof (msg));
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** pid (%u)!\n", fc->last_pid_sent);
- send_prebuilt_message_connection (&msg.header, c, NULL, fc == &c->fwd_fc);
- fc->poll_time = GNUNET_TIME_STD_BACKOFF (fc->poll_time);
- fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
- &connection_poll, fc);
-}
-
-
-/**
- * Build a PeerPath from the paths returned from the DHT, reversing the paths
- * to obtain a local peer -> destination path and interning the peer ids.
- *
- * @return Newly allocated and created path
- */
-static struct MeshPeerPath *
-path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
- unsigned int get_path_length,
- const struct GNUNET_PeerIdentity *put_path,
- unsigned int put_path_length)
-{
- struct MeshPeerPath *p;
- GNUNET_PEER_Id id;
- int i;
-
- p = path_new (1);
- p->peers[0] = myid;
- GNUNET_PEER_change_rc (myid, 1);
- i = get_path_length;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
- for (i--; i >= 0; i--)
- {
- id = GNUNET_PEER_intern (&get_path[i]);
- if (p->length > 0 && id == p->peers[p->length - 1])
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
- GNUNET_PEER_change_rc (id, -1);
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
- GNUNET_i2s (&get_path[i]));
- p->length++;
- p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
- p->peers[p->length - 1] = id;
- }
- }
- i = put_path_length;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
- for (i--; i >= 0; i--)
- {
- id = GNUNET_PEER_intern (&put_path[i]);
- if (id == myid)
- {
- /* PUT path went through us, so discard the path up until now and start
- * from here to get a much shorter (and loop-free) path.
- */
- path_destroy (p);
- p = path_new (0);
- }
- if (p->length > 0 && id == p->peers[p->length - 1])
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
- GNUNET_PEER_change_rc (id, -1);
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
- GNUNET_i2s (&put_path[i]));
- p->length++;
- p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
- p->peers[p->length - 1] = id;
- }
- }
-#if MESH_DEBUG
- if (get_path_length > 0)
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
- GNUNET_i2s (&get_path[0]));
- if (put_path_length > 0)
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
- GNUNET_i2s (&put_path[0]));
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
- p->length);
- for (i = 0; i < p->length; i++)
- {
- struct GNUNET_PeerIdentity peer_id;
-
- GNUNET_PEER_resolve (p->peers[i], &peer_id);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
- GNUNET_i2s (&peer_id));
- }
-#endif
- return p;
-}
-
-
-/**
- * Adds a path to the peer_infos of all the peers in the path
- *
- * @param p Path to process.
- * @param confirmed Whether we know if the path works or not.
- */
-static void
-path_add_to_peers (struct MeshPeerPath *p, int confirmed)
-{
- unsigned int i;
-
- /* TODO: invert and add */
- for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
- for (i++; i < p->length; i++)
- {
- struct MeshPeer *aux;
- struct MeshPeerPath *copy;
-
- aux = peer_get_short (p->peers[i]);
- copy = path_duplicate (p);
- copy->length = i + 1;
- peer_add_path (aux, copy, p->length < 3 ? GNUNET_NO : confirmed);
- }
-}
-
-
-/**
- * Search for a channel among the channels for a client
- *
- * @param c the client whose channels to search in
- * @param chid the local id of the channel
- *
- * @return channel handler, NULL if doesn't exist
- */
-static struct MeshChannel *
-channel_get_by_local_id (struct MeshClient *c, MESH_ChannelNumber chid)
-{
- if (0 == (chid & GNUNET_MESH_LOCAL_CHANNEL_ID_CLI))
- {
- GNUNET_break_op (0);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CHID %X not a local chid\n", chid);
- return NULL;
- }
- if (chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_SERV)
- return GNUNET_CONTAINER_multihashmap32_get (c->incoming_channels, chid);
- return GNUNET_CONTAINER_multihashmap32_get (c->own_channels, chid);
-}
-
-/**
- * Search for a tunnel by global ID using full PeerIdentities.
- *
- * @param t Tunnel containing the channel.
- * @param chid Public channel number.
- *
- * @return channel handler, NULL if doesn't exist
- */
-static struct MeshChannel *
-channel_get (struct MeshTunnel2 *t, MESH_ChannelNumber chid)
-{
- struct MeshChannel *ch;
-
- if (NULL == t)
- return NULL;
-
- for (ch = t->channel_head; NULL != ch; ch = ch->next)
- {
- if (ch->gid == chid)
- break;
- }
-
- return ch;
-}
-
-
-/**
- * Change the tunnel state.
- *
- * @param t Tunnel whose state to change.
- * @param state New state.
- */
-static void
-tunnel_change_state (struct MeshTunnel2* t, enum MeshTunnelState state)
-{
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Tunnel %s state was %s\n",
- peer2s (t->peer),
- GNUNET_MESH_DEBUG_TS2S (t->state));
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Tunnel %s state is now %s\n",
- peer2s (t->peer),
- GNUNET_MESH_DEBUG_TS2S (state));
- t->state = state;
-}
-
-
-/**
- * Cache a message to be sent once tunnel is online.
- *
- * @param t Tunnel to hold the message.
- * @param ch Channel the message is about.
- * @param msg Message itself (copy will be made).
- * @param fwd Is this fwd?
- */
-static void
-tunnel_queue_data (struct MeshTunnel2 *t,
- struct MeshChannel *ch,
- struct GNUNET_MessageHeader *msg,
- int fwd)
-{
- struct MeshTunnelQueue *tq;
- uint16_t size = ntohs (msg->size);
-
- tq = GNUNET_malloc (sizeof (struct MeshTunnelQueue) + size);
-
- tq->ch = ch;
- memcpy (&tq[1], msg, size);
- GNUNET_CONTAINER_DLL_insert_tail (t->tq_head, t->tq_tail, tq);
-}
-
-
-/**
- * Send all cached messages that we can, tunnel is online.
- *
- * @param t Tunnel that holds the messages.
- * @param fwd Is this fwd?
- */
-static void
-tunnel_send_queued_data (struct MeshTunnel2 *t, int fwd)
-{
- struct MeshTunnelQueue *tq;
- struct MeshTunnelQueue *next;
- unsigned int room;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "tunnel_send_queued_data on %s\n",
- GNUNET_h2s (&t->id));
- room = tunnel_get_buffer (t, fwd);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " buffer space: %u\n", room);
- for (tq = t->tq_head; NULL != tq && room > 0; tq = next)
- {
- next = tq->next;
- room--;
- GNUNET_CONTAINER_DLL_remove (t->tq_head, t->tq_tail, tq);
- send_prebuilt_message_channel ((struct GNUNET_MessageHeader *) &tq[1],
- tq->ch, fwd);
-
- GNUNET_free (tq);
- }
-}
-
-
-static void
-connection_change_state (struct MeshConnection* c,
- enum MeshConnectionState state)
-{
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Connection %s[%X] state was %s\n",
- peer2s (c->t->peer), c->id,
- GNUNET_MESH_DEBUG_CS2S (c->state));
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Connection %s[%X] state is now %s\n",
- peer2s (c->t->peer), c->id,
- GNUNET_MESH_DEBUG_CS2S (state));
- c->state = state;
-}
-
-
-/**
- * Add a client to a channel, initializing all needed data structures.
- *
- * @param ch Channel to which add the client.
- * @param c Client which to add to the channel.
- */
-static void
-channel_add_client (struct MeshChannel *ch, struct MeshClient *c)
-{
- struct MeshTunnel2 *t = ch->t;
-
- if (NULL != ch->dest)
- {
- GNUNET_break(0);
- return;
- }
-
- /* Assign local id as destination */
- while (NULL != channel_get_by_local_id (c, t->next_local_chid))
- t->next_local_chid = (t->next_local_chid + 1) | GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
- ch->lid_dest = t->next_local_chid++;
- t->next_local_chid = t->next_local_chid | GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
-
- /* Store in client's hashmap */
- if (GNUNET_OK !=
- GNUNET_CONTAINER_multihashmap32_put (c->incoming_channels,
- ch->lid_dest, ch,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
- {
- GNUNET_break (0);
- return;
- }
- ch->dest = c;
-}
-
-
-static struct MeshConnection *
-tunnel_use_path (struct MeshTunnel2 *t, struct MeshPeerPath *p)
-{
- struct MeshConnection *c;
- struct MeshPeer *peer;
- unsigned int own_pos;
-
- c = connection_new (&t->id, t->next_cid++);
- for (own_pos = 0; own_pos < p->length; own_pos++)
- {
- if (p->peers[own_pos] == myid)
- break;
- }
- if (own_pos > p->length - 1)
- {
- GNUNET_break (0);
- connection_destroy (c);
- return NULL;
- }
- c->own_pos = own_pos;
- c->path = p;
-
- if (0 == own_pos)
- {
- c->fwd_maintenance_task =
- GNUNET_SCHEDULER_add_delayed (refresh_connection_time,
- &connection_fwd_keepalive, c);
- }
-
- peer = connection_get_next_hop (c);
- GNUNET_CONTAINER_multihashmap_put (peer->connections, &c->t->id, c,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
- peer = connection_get_prev_hop (c);
- GNUNET_CONTAINER_multihashmap_put (peer->connections, &c->t->id, c,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
- return c;
-}
-
-
-/**
- * Notifies a tunnel that a connection has broken that affects at least
- * some of its peers. Sends a notification towards the root of the tree.
- * In case the peer is the owner of the tree, notifies the client that owns
- * the tunnel and tries to reconnect.
- *
- * FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME
- *
- * @param t Tunnel affected.
- * @param p1 Peer that got disconnected from p2.
- * @param p2 Peer that got disconnected from p1.
- *
- * @return Short ID of the peer disconnected (either p1 or p2).
- * 0 if the tunnel remained unaffected.
- */
-static GNUNET_PEER_Id
-tunnel_notify_connection_broken (struct MeshTunnel2* t,
- GNUNET_PEER_Id p1, GNUNET_PEER_Id p2)
-{
-// if (myid != p1 && myid != p2) FIXME
-// {
-// 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);
-// msg.tid = htonl (t->id.tid);
-// msg.peer1 = my_full_id;
-// GNUNET_PEER_resolve (pid, &msg.peer2);
-// GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
-// send_prebuilt_message (&msg.header, &neighbor, t);
-// }
- return 0;
-}
-
-
-/**
- * Send an end-to-end FWD ACK message for the most recent in-sequence payload.
- *
- * @param ch Channel this is about.
- * @param fwd Is for FWD traffic? (ACK dest->owner)
- */
-static void
-channel_send_data_ack (struct MeshChannel *ch, int fwd)
-{
- struct GNUNET_MESH_DataACK msg;
- struct MeshChannelReliability *rel;
- struct MeshReliableMessage *copy;
- unsigned int delta;
- uint64_t mask;
- uint32_t *mid;
- uint16_t type;
-
- if (GNUNET_NO == ch->reliable)
- {
- GNUNET_break (0);
- return;
- }
- rel = fwd ? ch->bck_rel : ch->fwd_rel;
- mid = fwd ? &ch->mid_recv_fwd : &ch->mid_recv_bck;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "send_data_ack for %u\n",
- *mid - 1);
-
- type = GNUNET_MESSAGE_TYPE_MESH_DATA_ACK;
- msg.header.type = htons (type);
- msg.header.size = htons (sizeof (msg));
- msg.chid = htonl (ch->gid);
- msg.mid = htonl (*mid - 1);
- msg.futures = 0;
- for (copy = rel->head_recv; NULL != copy; copy = copy->next)
- {
- if (copy->type != type)
- continue;
- delta = copy->mid - *mid;
- 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_channel (&msg.header, ch, fwd);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_data_ack END\n");
-}
-
-
-/**
- * Send an ACK informing the predecessor about the available buffer space.
- *
- * Note that for fwd ack, the FWD mean forward *traffic* (root->dest),
- * the ACK itself goes "back" (dest->root).
- *
- * @param c Connection on which to send the ACK.
- * @param fwd Is this FWD ACK? (Going dest->owner)
- */
-static void
-connection_send_ack (struct MeshConnection *c, int fwd)
-{
- struct MeshFlowControl *next_fc;
- struct MeshFlowControl *prev_fc;
- uint32_t ack;
- int delta;
-
- next_fc = fwd ? &c->fwd_fc : &c->bck_fc;
- prev_fc = fwd ? &c->bck_fc : &c->fwd_fc;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "connection send %s ack on %s[%X]\n",
- fwd ? "FWD" : "BCK", GNUNET_h2s (&c->t->id), c->id);
-
- /* Check if we need to transmit the ACK */
- if (prev_fc->last_ack_sent - prev_fc->last_pid_recv > 3)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer > 3\n");
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " 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 = next_fc->queue_max - next_fc->queue_n;
- ack = prev_fc->last_pid_recv + delta;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " last pid %u, last ack %u, qmax %u, q %u\n",
- prev_fc->last_pid_recv, prev_fc->last_ack_sent,
- next_fc->queue_max, next_fc->queue_n);
- if (ack == prev_fc->last_ack_sent)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not needed\n");
- return;
- }
-
- prev_fc->last_ack_sent = ack;
- send_ack (c, ack, fwd);
-}
-
-
-/**
- * Modify the mesh message TID from global to local and send to client.
- *
- * @param ch Channel 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
-channel_send_client_to_tid (struct MeshChannel *ch,
- const struct GNUNET_MESH_Data *msg,
- struct MeshClient *c, MESH_ChannelNumber id)
-{
- struct GNUNET_MESH_LocalData *copy;
- uint16_t size = ntohs (msg->header.size) - sizeof (struct GNUNET_MESH_Data);
- char cbuf[size + sizeof (struct GNUNET_MESH_LocalData)];
-
- if (size < sizeof (struct GNUNET_MessageHeader))
- {
- GNUNET_break_op (0);
- return;
- }
- if (NULL == c)
- {
- GNUNET_break (0);
- return;
- }
- copy = (struct GNUNET_MESH_LocalData *) cbuf;
- memcpy (©[1], &msg[1], size);
- copy->header.size = htons (sizeof (struct GNUNET_MESH_LocalData) + size);
- copy->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA);
- copy->id = htonl (id);
- GNUNET_SERVER_notification_context_unicast (nc, c->handle,
- ©->header, GNUNET_NO);
-}
-
-/**
- * Modify the data message ID from global to local and send to client.
- *
- * @param ch Channel on which to send the message.
- * @param msg Message to modify and send.
- * @param fwd Forward?
- */
-static void
-channel_send_client_data (struct MeshChannel *ch,
- const struct GNUNET_MESH_Data *msg,
- int fwd)
-{
- if (fwd)
- channel_send_client_to_tid (ch, msg, ch->dest, ch->lid_dest);
- else
- channel_send_client_to_tid (ch, msg, ch->root, ch->lid_root);
-}
-
-
-/**
- * Send a buffered message to the client, for in order delivery or
- * as result of client ACK.
- *
- * @param ch Channel on which to empty the message buffer.
- * @param c Client to send to.
- * @param rel Reliability structure to corresponding peer.
- * If rel == bck_rel, this is FWD data.
- */
-static void
-channel_send_client_buffered_data (struct MeshChannel *ch,
- struct MeshClient *c,
- struct MeshChannelReliability *rel)
-{
- struct MeshReliableMessage *copy;
- uint32_t *mid;
-
- if (GNUNET_NO == rel->client_ready)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client not ready\n");
- return;
- }
-
- mid = rel == ch->bck_rel ? &ch->mid_recv_fwd : &ch->mid_recv_bck;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_buffered_data\n");
- copy = rel->head_recv;
- /* We never buffer channel management messages */
- if (NULL != copy)
- {
- if (copy->mid == *mid || GNUNET_NO == ch->reliable)
- {
- struct GNUNET_MESH_Data *msg = (struct GNUNET_MESH_Data *) ©[1];
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " have %u! now expecting %u\n",
- copy->mid, *mid + 1);
- channel_send_client_data (ch, msg, (rel == ch->bck_rel));
- rel->n_recv--;
- *mid = *mid + 1;
- GNUNET_CONTAINER_DLL_remove (rel->head_recv, rel->tail_recv, copy);
- GNUNET_free (copy);
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " reliable && don't have %u, next is %u\n",
- *mid,
- copy->mid);
- return;
- }
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_buffered_data END\n");
-}
-
-
-/**
- * We have received a message out of order, or the client is not ready.
- * Buffer it until we receive an ACK from the client or the missing
- * message from the channel.
- *
- * @param msg Message to buffer (MUST be of type MESH_DATA).
- * @param rel Reliability data to the corresponding direction.
- */
-static void
-channel_rel_add_buffered_data (const struct GNUNET_MESH_Data *msg,
- struct MeshChannelReliability *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);
-
- rel->n_recv++;
-
- // 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
-rel_message_free (struct MeshReliableMessage *copy)
-{
- struct MeshChannelReliability *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 channel,
- * during a channel destruction.
- * Frees the reliability structure itself.
- *
- * @param rel Reliability data for a channel.
- */
-static void
-channel_rel_free_all (struct MeshChannelReliability *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 rel Reliability data.
- * @param msg DataACK message with a bitfield of future ACK'd messages.
- */
-static void
-channel_rel_free_sent (struct MeshChannelReliability *rel,
- const struct GNUNET_MESH_DataACK *msg)
-{
- 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;
- rel_message_free (copy);
- copy = next;
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "free_sent_reliable END\n");
-}
-
-
-/**
- * We haven't received an ACK after a certain time: restransmit the message.
- *
- * @param cls Closure (MeshReliableMessage with the message to restransmit)
- * @param tc TaskContext.
- */
-static void
-channel_retransmit_message (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct MeshChannelReliability *rel = cls;
- struct MeshReliableMessage *copy;
- struct MeshPeerQueue *q;
- struct MeshChannel *ch;
- struct MeshConnection *c;
- struct GNUNET_MESH_Data *payload;
- struct MeshPeer *hop;
- int fwd;
-
- rel->retry_task = GNUNET_SCHEDULER_NO_TASK;
- if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
- return;
-
- ch = rel->ch;
- copy = rel->head_sent;
- if (NULL == copy)
- {
- GNUNET_break (0);
- return;
- }
-
- /* Search the message to be retransmitted in the outgoing queue.
- * Check only the queue for the connection that is going to be used,
- * if the message is stuck in some other connection's queue we shouldn't
- * act upon it:
- * - cancelling it and sending the new one doesn't guarantee it's delivery,
- * the old connection could be temporary stalled or the queue happened to
- * be long at time of insertion.
- * - not sending the new one could cause terrible delays the old connection
- * is stalled.
- */
- payload = (struct GNUNET_MESH_Data *) ©[1];
- fwd = (rel == ch->fwd_rel);
- c = tunnel_get_connection (ch->t, fwd);
- hop = connection_get_hop (c, fwd);
- for (q = hop->queue_head; NULL != q; q = q->next)
- {
- if (ntohs (payload->header.type) == q->type && ch == q->ch)
- {
- struct GNUNET_MESH_Data *queued_data = q->cls;
-
- if (queued_data->mid == payload->mid)
- break;
- }
- }
-
- /* Message not found in the queue that we are going to use. */
- if (NULL == q)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! RETRANSMIT %u\n", copy->mid);
-
- send_prebuilt_message_channel (&payload->header, ch, ch->fwd_rel == rel);
- GNUNET_STATISTICS_update (stats, "# data retransmitted", 1, GNUNET_NO);
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! ALREADY 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,
- &channel_retransmit_message,
- cls);
-}
-
-
-/**
- * Send an ACK to a client if needed.
- *
- * @param ch Channel this is regarding.
- * @param fwd Is this about fwd traffic? (ACk goes the opposite direction).
- */
-static void
-channel_send_client_ack (struct MeshChannel *ch, int fwd)
-{
- struct MeshClient *c;
- int blocked;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Channel send client %s ack on %s:%X\n",
- fwd ? "FWD" : "BCK", GNUNET_h2s (&ch->t->id), ch->gid);
-
- /* Check for buffer space */
- if (0 >= tunnel_get_buffer (ch->t, fwd))
- return;
-
- /* Client to receive the ACK (fwd indicates traffic to be ACK'd) */
- c = fwd ? ch->root : ch->dest;
-
- blocked = fwd ? ch->blocked_fwd : ch->blocked_bck;
- if (GNUNET_YES == blocked)
- send_local_ack (ch, c, fwd);
- else
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Client not blocked\n");
-}
-
-
-/**
- * Send ACK on one or more connections due to buffer space to the client.
- *
- * @param ch Channel which has some free buffer space.
- * @param buffer Buffer space.
- * @param fwd Is this in the FWD direction?
- */
-static void
-channel_send_connection_ack (struct MeshChannel *ch, uint32_t buffer, int fwd)
-{
- struct MeshTunnel2 *t = ch->t;
- struct MeshConnection *c;
- struct MeshFlowControl *fc;
- uint32_t allowed;
- uint32_t to_allow;
- unsigned int cs;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Channel send connection %s ack on %s:%X\n",
- fwd ? "FWD" : "BCK", GNUNET_h2s (&ch->t->id), ch->gid);
-
- /* Count connections, how many messages are already allowed */
- for (cs = 0, allowed = 0, c = t->connection_head; NULL != c; c = c->next)
- {
- fc = fwd ? &c->fwd_fc : &c->bck_fc;
- if (GMC_is_pid_bigger(fc->last_pid_recv, fc->last_ack_sent))
- {
- GNUNET_break (0);
- continue;
- }
- allowed += fc->last_ack_sent - fc->last_pid_recv;
- cs++;
- }
-
- /* Make sure there is no overflow */
- if (allowed > buffer)
- {
- GNUNET_break (0);
- return;
- }
-
- /* Authorize connections to send more data */
- to_allow = buffer - allowed;
- for (c = t->connection_head; NULL != c && to_allow > 0; c = c->next)
- {
- fc = fwd ? &c->fwd_fc : &c->bck_fc;
- if (fc->last_ack_sent - fc->last_pid_recv > 64 / 3)
- {
- continue;
- }
- send_ack (c, fc->last_ack_sent + 1, fwd);
- to_allow--;
- }
-
- GNUNET_break (to_allow == 0);
-}
-
-
-/**
- * Channel was ACK'd by remote peer, mark as ready and cancel retransmission.
- *
- * @param ch Channel to mark as ready.
- * @param fwd Was the CREATE message sent fwd?
- */
-static void
-channel_confirm (struct MeshChannel *ch, int fwd)
-{
- struct MeshChannelReliability *rel;
- struct MeshReliableMessage *copy;
- struct MeshReliableMessage *next;
-
- ch->state = MESH_CHANNEL_READY;
-
- rel = fwd ? ch->fwd_rel : ch->bck_rel;
- for (copy = rel->head_sent; NULL != copy; copy = next)
- {
- struct GNUNET_MessageHeader *msg;
-
- next = copy->next;
- msg = (struct GNUNET_MessageHeader *) ©[1];
- if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE)
- {
- rel_message_free (copy);
- /* TODO return? */
- }
- }
-}
-
-
-/**
- * Save a copy to retransmit in case it gets lost.
- *
- * Initializes all needed callbacks and timers.
- *
- * @param ch Channel this message goes on.
- * @param msg Message to copy.
- * @param fwd Is this fwd traffic?
- */
-static void
-channel_save_copy (struct MeshChannel *ch,
- const struct GNUNET_MessageHeader *msg,
- int fwd)
-{
- struct MeshChannelReliability *rel;
- struct MeshReliableMessage *copy;
- uint32_t mid;
- uint16_t type;
- uint16_t size;
-
- rel = fwd ? ch->fwd_rel : ch->bck_rel;
- mid = fwd ? ch->mid_send_fwd : ch->mid_send_bck;
- type = ntohs (msg->type);
- size = ntohs (msg->size);
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! SAVE %u\n", mid);
- copy = GNUNET_malloc (sizeof (struct MeshReliableMessage) + size);
- copy->mid = mid;
- copy->timestamp = GNUNET_TIME_absolute_get ();
- copy->rel = rel;
- copy->type = type;
- memcpy (©[1], msg, size);
- 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 =
- GNUNET_TIME_relative_multiply (rel->expected_delay,
- MESH_RETRANSMIT_MARGIN);
- rel->retry_task =
- GNUNET_SCHEDULER_add_delayed (rel->retry_timer,
- &channel_retransmit_message,
- rel);
- }
-}
-
-
-/**
- * Send keepalive packets for a connection.
- *
- * @param c Connection to keep alive..
- * @param fwd Is this a FWD keepalive? (owner -> dest).
- */
-static void
-connection_keepalive (struct MeshConnection *c, int fwd)
-{
- struct GNUNET_MESH_ConnectionKeepAlive *msg;
- size_t size = sizeof (struct GNUNET_MESH_ConnectionKeepAlive);
- char cbuf[size];
- uint16_t type;
-
- type = fwd ? GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE :
- GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "sending %s keepalive for connection %s[%d]\n",
- fwd ? "FWD" : "BCK",
- peer2s (c->t->peer),
- c->id);
-
- msg = (struct GNUNET_MESH_ConnectionKeepAlive *) cbuf;
- msg->header.size = htons (size);
- msg->header.type = htons (type);
- msg->cid = htonl (c->id);
- msg->tid = c->t->id;
-
- send_prebuilt_message_connection (&msg->header, c, NULL, fwd);
-}
-
-
-/**
- * Send CONNECTION_{CREATE/ACK} packets for a connection.
- *
- * @param c Connection for which to send the message.
- * @param fwd If GNUNET_YES, send CREATE, otherwise send ACK.
- */
-static void
-connection_recreate (struct MeshConnection *c, int fwd)
-{
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "sending connection recreate\n");
- if (fwd)
- send_connection_create (c);
- else
- send_connection_ack (c, GNUNET_NO);
-}
-
-
-/**
- * Generic connection timer management.
- * Depending on the role of the peer in the connection will send the
- * appropriate message (build or keepalive)
- *
- * @param c Conncetion to maintain.
- * @param fwd Is FWD?
- */
-static void
-connection_maintain (struct MeshConnection *c, int fwd)
-{
- if (MESH_TUNNEL_SEARCHING == c->t->state)
- {
- /* TODO DHT GET with RO_BART */
- return;
- }
- switch (c->state)
- {
- case MESH_CONNECTION_NEW:
- GNUNET_break (0);
- case MESH_CONNECTION_SENT:
- connection_recreate (c, fwd);
- break;
- case MESH_CONNECTION_READY:
- connection_keepalive (c, fwd);
- break;
- default:
- break;
- }
-}
-
-
-static void
-connection_fwd_keepalive (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct MeshConnection *c = cls;
-
- c->fwd_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
- if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
- return;
-
- connection_maintain (c, GNUNET_YES);
- c->fwd_maintenance_task = GNUNET_SCHEDULER_add_delayed (refresh_connection_time,
- &connection_fwd_keepalive,
- c);
-}
-
-
-static void
-connection_bck_keepalive (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct MeshConnection *c = cls;
-
- c->bck_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
- if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
- return;
-
- connection_maintain (c, GNUNET_NO);
- c->bck_maintenance_task = GNUNET_SCHEDULER_add_delayed (refresh_connection_time,
- &connection_bck_keepalive,
- c);
-}
-
-
-/**
- * Send a message to all peers in this connection that the connection
- * is no longer valid.
- *
- * If some peer should not receive the message, it should be zero'ed out
- * before calling this function.
- *
- * @param c The connection whose peers to notify.
- */
-static void
-connection_send_destroy (struct MeshConnection *c)
-{
- struct GNUNET_MESH_ConnectionDestroy msg;
-
- msg.header.size = htons (sizeof (msg));
- msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);;
- msg.cid = htonl (c->id);
- msg.tid = c->t->id;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " sending connection destroy for connection %s[%X]\n",
- peer2s (c->t->peer),
- c->id);
-
- send_prebuilt_message_connection (&msg.header, c, NULL, GNUNET_YES);
- send_prebuilt_message_connection (&msg.header, c, NULL, GNUNET_NO);
- c->destroy = GNUNET_YES;
-}
-
-
-/**
- * Confirm we got a channel create.
- *
- * @param ch The channel to confirm.
- * @param fwd Should we send the ACK fwd?
- */
-static void
-channel_send_ack (struct MeshChannel *ch, int fwd)
-{
- struct GNUNET_MESH_ChannelManage msg;
-
- msg.header.size = htons (sizeof (msg));
- msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_CHANNEL_ACK);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " sending channel destroy for channel %s:%X\n",
- peer2s (ch->t->peer),
- ch->gid);
-
- msg.chid = htonl (ch->gid);
- send_prebuilt_message_channel (&msg.header, ch, fwd);
-}
-
-
-/**
- * Send a message to all clients (local and remote) of this channel
- * notifying that the channel is no longer valid.
- *
- * If some peer or client should not receive the message,
- * should be zero'ed out before calling this function.
- *
- * @param ch The channel whose clients to notify.
- */
-static void
-channel_send_destroy (struct MeshChannel *ch)
-{
- struct GNUNET_MESH_ChannelManage msg;
-
- msg.header.size = htons (sizeof (msg));
- msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_CHANNEL_DESTROY);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " sending channel destroy for channel %s:%X\n",
- peer2s (ch->t->peer),
- ch->gid);
-
- if (NULL != ch->root)
- {
- msg.chid = htonl (ch->lid_root);
- send_local_channel_destroy (ch, GNUNET_NO);
- }
- else
- {
- msg.chid = htonl (ch->gid);
- send_prebuilt_message_channel (&msg.header, ch, GNUNET_NO);
- }
-
- if (NULL != ch->dest)
- {
- msg.chid = htonl (ch->lid_dest);
- send_local_channel_destroy (ch, GNUNET_YES);
- }
- else
- {
- msg.chid = htonl (ch->gid);
- send_prebuilt_message_channel (&msg.header, ch, GNUNET_YES);
- }
-}
-
-
-/**
- * Create a tunnel.
- *
- * @param tid Tunnel ID.
- */
-static struct MeshTunnel2 *
-tunnel_new (const struct GNUNET_HashCode *tid)
-{
- struct MeshTunnel2 *t;
-
- t = GNUNET_new (struct MeshTunnel2);
- t->id = *tid;
- t->next_chid = 0;
- t->next_local_chid = GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
- if (GNUNET_OK !=
- GNUNET_CONTAINER_multihashmap_put (tunnels, tid, t,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
- {
- GNUNET_break (0);
- tunnel_destroy (t);
- return NULL;
- }
-
-// char salt[] = "salt";
-// GNUNET_CRYPTO_kdf (&t->e_key, sizeof (struct GNUNET_CRYPTO_AesSessionKey),
-// salt, sizeof (salt),
-// &t->e_key, sizeof (struct GNUNET_CRYPTO_AesSessionKey),
-// &my_full_id, sizeof (struct GNUNET_PeerIdentity),
-// GNUNET_PEER_resolve2 (t->peer->id), sizeof (struct GNUNET_PeerIdentity),
-// NULL);
-// GNUNET_CRYPTO_kdf (&t->d_key, sizeof (struct GNUNET_CRYPTO_AesSessionKey),
-// salt, sizeof (salt),
-// &t->d_key, sizeof (struct GNUNET_CRYPTO_AesSessionKey),
-// GNUNET_PEER_resolve2 (t->peer->id), sizeof (struct GNUNET_PeerIdentity),
-// &my_full_id, sizeof (struct GNUNET_PeerIdentity),
-// NULL);
-
- return t;
-}
-
-
-/**
- * Find a tunnel.
- *
- * @param tid Tunnel ID.
- */
-static struct MeshTunnel2 *
-tunnel_get (const struct GNUNET_HashCode *tid)
-{
- return GNUNET_CONTAINER_multihashmap_get (tunnels, tid);
-}
-
-
-/**
- * Add a connection to a tunnel.
- *
- * @param t Tunnel.
- * @param c Connection.
- */
-static void
-tunnel_add_connection (struct MeshTunnel2 *t, struct MeshConnection *c)
-{
- c->t = t;
- GNUNET_CONTAINER_DLL_insert_tail (t->connection_head, t->connection_tail, c);
-}
-
-
-/**
- * Initialize a Flow Control structure to the initial state.
- *
- * @param fc Flow Control structure to initialize.
- */
-static void
-fc_init (struct MeshFlowControl *fc)
-{
- fc->next_pid = 0;
- fc->last_pid_sent = (uint32_t) -1; /* Next (expected) = 0 */
- fc->last_pid_recv = (uint32_t) -1;
- fc->last_ack_sent = (uint32_t) 0;
- fc->last_ack_recv = (uint32_t) 0;
- fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
- fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
- fc->queue_n = 0;
- fc->queue_max = (max_msgs_queue / max_connections) + 1;
-}
-
-
-static struct MeshConnection *
-connection_new (struct GNUNET_HashCode *tid, uint32_t cid)
-{
- struct MeshConnection *c;
- struct MeshTunnel2 *t;
-
- t = tunnel_get (tid);
- if (NULL == t)
- {
- t = tunnel_new (tid);
- if (NULL == t)
- {
- GNUNET_break (0);
- return NULL;
- }
- }
-
- c = GNUNET_new (struct MeshConnection);
- c->id = cid;
- fc_init (&c->fwd_fc);
- fc_init (&c->bck_fc);
- c->fwd_fc.c = c;
- c->bck_fc.c = c;
- tunnel_add_connection (t, c);
-
- return c;
-}
-
-
-/**
- * Find a connection.
- *
- * @param tid Tunnel ID.
- * @param cid Connection ID.
- */
-static struct MeshConnection *
-connection_get (const struct GNUNET_HashCode *tid, uint32_t cid)
-{
- struct MeshConnection *c;
- struct MeshTunnel2 *t;
-
- t = tunnel_get (tid);
- if (NULL == t)
- return NULL;
- for (c = t->connection_head; NULL != c; c = c->next)
- if (c->id == cid)
- return c;
-
- return NULL;
-}
-
-
-static void
-connection_destroy (struct MeshConnection *c)
-{
- struct MeshPeer *peer;
-
- if (NULL == c)
- return;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying connection %s[%X]\n",
- peer2s (c->t->peer),
- c->id);
-
- /* Cancel all traffic */
- connection_cancel_queues (c, GNUNET_YES);
- connection_cancel_queues (c, GNUNET_NO);
-
- /* Cancel maintainance task (keepalive/timeout) */
- if (GNUNET_SCHEDULER_NO_TASK != c->fwd_maintenance_task)
- GNUNET_SCHEDULER_cancel (c->fwd_maintenance_task);
- if (GNUNET_SCHEDULER_NO_TASK != c->bck_maintenance_task)
- GNUNET_SCHEDULER_cancel (c->bck_maintenance_task);
-
- /* Deregister from neighbors */
- peer = connection_get_next_hop (c);
- if (NULL != peer)
- GNUNET_CONTAINER_multihashmap_remove (peer->connections, &c->t->id, c);
- peer = connection_get_prev_hop (c);
- if (NULL != peer)
- GNUNET_CONTAINER_multihashmap_remove (peer->connections, &c->t->id, c);
-
- /* Delete */
- GNUNET_STATISTICS_update (stats, "# connections", -1, GNUNET_NO);
- GNUNET_CONTAINER_DLL_remove (c->t->connection_head, c->t->connection_tail, c);
- GNUNET_free (c);
-}
-
-
-static void
-tunnel_destroy (struct MeshTunnel2 *t)
-{
- struct MeshConnection *c;
- struct MeshConnection *next;
-
- if (NULL == t)
- return;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s\n",
- peer2s (t->peer));
-
- if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &t->id, t))
- GNUNET_break (0);
-
- for (c = t->connection_head; NULL != c; c = next)
- {
- next = c->next;
- connection_destroy (c);
- }
-
- GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
-
- GNUNET_free (t);
-}
-
-
-/**
- * Tunnel is empty: destroy it.
- *
- * Notifies all connections about the destruction.
- *
- * @param t Tunnel to destroy.
- */
-static void
-tunnel_destroy_empty (struct MeshTunnel2 *t)
-{
- struct MeshConnection *c;
-
- for (c = t->connection_head; NULL != c; c = c->next)
- {
- if (GNUNET_NO == c->destroy)
- connection_send_destroy (c);
- }
-
- if (0 == t->pending_messages)
- tunnel_destroy (t);
- else
- t->destroy = GNUNET_YES;
-}
-
-
-/**
- * Destroy tunnel if empty (no more channels).
- *
- * @param t Tunnel to destroy if empty.
- */
-static void
-tunnel_destroy_if_empty (struct MeshTunnel2 *t)
-{
- if (NULL != t->channel_head)
- return;
-
- tunnel_destroy_empty (t);
-}
-
-
-/**
- * Destroy a channel and free all resources.
- *
- * @param ch Channel to destroy.
- */
-static void
-channel_destroy (struct MeshChannel *ch)
-{
- struct MeshClient *c;
-
- if (NULL == ch)
- return;
-
- c = ch->root;
- if (NULL != c)
- {
- if (GNUNET_YES != GNUNET_CONTAINER_multihashmap32_remove (c->own_channels,
- ch->lid_root, ch))
- {
- GNUNET_break (0);
- }
- }
-
- c = ch->dest;
- if (NULL != c)
- {
- if (GNUNET_YES !=
- GNUNET_CONTAINER_multihashmap32_remove (c->incoming_channels,
- ch->lid_dest, ch))
- {
- GNUNET_break (0);
- }
- }
-
- channel_rel_free_all (ch->fwd_rel);
- channel_rel_free_all (ch->bck_rel);
-
- GNUNET_CONTAINER_DLL_remove (ch->t->channel_head, ch->t->channel_tail, ch);
- GNUNET_STATISTICS_update (stats, "# channels", -1, GNUNET_NO);
-
- GNUNET_free (ch);
-}
-
-/**
- * Create a new channel.
- *
- * @param t Tunnel this channel is in.
- * @param owner Client that owns the channel, NULL for foreign channels.
- * @param lid_root Local ID for root client.
- *
- * @return A new initialized channel. NULL on error.
- */
-static struct MeshChannel *
-channel_new (struct MeshTunnel2 *t,
- struct MeshClient *owner, MESH_ChannelNumber lid_root)
-{
- struct MeshChannel *ch;
-
- ch = GNUNET_new (struct MeshChannel);
- ch->root = owner;
- ch->lid_root = lid_root;
- ch->t = t;
- ch->blocked_fwd = GNUNET_YES;
- ch->blocked_bck = GNUNET_YES;
-
- GNUNET_CONTAINER_DLL_insert (t->channel_head, t->channel_tail, ch);
-
- GNUNET_STATISTICS_update (stats, "# channels", 1, GNUNET_NO);
-
- if (NULL != owner)
- {
- while (NULL != channel_get (t, t->next_chid))
- t->next_chid = (t->next_chid + 1) & ~GNUNET_MESH_LOCAL_CHANNEL_ID_CLI;
- ch->gid = t->next_chid;
- t->next_chid = (t->next_chid + 1) & ~GNUNET_MESH_LOCAL_CHANNEL_ID_CLI;
-
- if(GNUNET_OK !=
- GNUNET_CONTAINER_multihashmap32_put (owner->own_channels, lid_root, ch,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
- {
- GNUNET_break (0);
- channel_destroy (ch);
- GNUNET_SERVER_receive_done (owner->handle, GNUNET_SYSERR);
- return NULL;
- }
- }
-
- return ch;
-}
-
-
-/**
- * Set options in a channel, extracted from a bit flag field
- *
- * @param ch Channel to set options to.
- * @param options Bit array in host byte order.
- */
-static void
-channel_set_options (struct MeshChannel *ch, uint32_t options)
-{
- ch->nobuffer = (options & GNUNET_MESH_OPTION_NOBUFFER) != 0 ?
- GNUNET_YES : GNUNET_NO;
- ch->reliable = (options & GNUNET_MESH_OPTION_RELIABLE) != 0 ?
- GNUNET_YES : GNUNET_NO;
-}
-
-
-/**
- * Iterator for deleting each channel whose client endpoint disconnected.
- *
- * @param cls Closure (client that has disconnected).
- * @param key The local channel id (used to access the hashmap).
- * @param value The value stored at the key (channel to destroy).
- *
- * @return GNUNET_OK, keep iterating.
- */
-static int
-channel_destroy_iterator (void *cls,
- uint32_t key,
- void *value)
-{
- struct MeshChannel *ch = value;
- struct MeshClient *c = cls;
- struct MeshTunnel2 *t;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " Channel %X (%X / %X) destroy, due to client %u shutdown.\n",
- ch->gid, ch->lid_root, ch->lid_dest, c->id);
-
- if (c == ch->dest)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is destination.\n", c->id);
- ch->dest = NULL;
- }
- if (c == ch->root)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is owner.\n", c->id);
- ch->root = NULL;
- }
-
- t = ch->t;
- channel_send_destroy (ch);
- channel_destroy (ch);
- tunnel_destroy_if_empty (t);
-
- return GNUNET_OK;
-}
-
-
-/**
- * Remove client's ports from the global hashmap on disconnect.
- *
- * @param cls Closure (unused).
- * @param key Port.
- * @param value Client 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 connection if called.
- *
- * @param cls Closure (connection to destroy).
- * @param tc TaskContext.
- */
-static void
-connection_fwd_timeout (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct MeshConnection *c = cls;
-
- c->fwd_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
- if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
- return;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Connection %s[%X] FWD timed out. Destroying.\n",
- peer2s (c->t->peer),
- c->id);
-
- if (connection_is_origin (c, GNUNET_YES)) /* If local, leave. */
- return;
-
- connection_destroy (c);
-}
-
-
-/**
- * Timeout function due to lack of keepalive/traffic from the destination.
- * Destroys connection if called.
- *
- * @param cls Closure (connection to destroy).
- * @param tc TaskContext
- */
-static void
-connection_bck_timeout (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct MeshConnection *c = cls;
-
- c->bck_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
- if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
- return;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Connection %s[%X] FWD timed out. Destroying.\n",
- peer2s (c->t->peer),
- c->id);
-
- if (connection_is_origin (c, GNUNET_NO)) /* If local, leave. */
- return;
-
- connection_destroy (c);
-}
-
-
-/**
- * Resets the connection 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 connection,
- * due to lack of activity.
- * Starts the tiemout if no timeout was running (connection just created).
- *
- * @param c Connection whose timeout to reset.
- * @param fwd Is this forward?
- *
- * TODO use heap to improve efficiency of scheduler.
- */
-static void
-connection_reset_timeout (struct MeshConnection *c, int fwd)
-{
- GNUNET_SCHEDULER_TaskIdentifier *ti;
- GNUNET_SCHEDULER_Task f;
-
- ti = fwd ? &c->fwd_maintenance_task : &c->bck_maintenance_task;
-
- if (GNUNET_SCHEDULER_NO_TASK != *ti)
- GNUNET_SCHEDULER_cancel (*ti);
-
- if (connection_is_origin (c, fwd)) /* Endpoint */
- {
- f = fwd ? &connection_fwd_keepalive : &connection_bck_keepalive;
- *ti = GNUNET_SCHEDULER_add_delayed (refresh_connection_time, f, c);
- }
- else /* Relay */
- {
- struct GNUNET_TIME_Relative delay;
-
- delay = GNUNET_TIME_relative_multiply (refresh_connection_time, 4);
- f = fwd ? &connection_fwd_timeout : &connection_bck_timeout;
- *ti = GNUNET_SCHEDULER_add_delayed (delay, f, c);
- }
-}
-
-
-/**
- * Iterator to notify all connections of a broken link. Mark connections
- * to destroy after all traffic has been sent.
- *
- * @param cls Closure (peer disconnected).
- * @param key Current key code (tid).
- * @param value Value in the hash map (connection).
- *
- * @return GNUNET_YES if we should continue to iterate,
- * GNUNET_NO if not.
- */
-static int
-connection_broken (void *cls,
- const struct GNUNET_HashCode *key,
- void *value)
-{
- struct MeshPeer *peer = cls;
- struct MeshConnection *c = value;
- struct GNUNET_MESH_ConnectionBroken msg;
- int fwd;
-
- fwd = peer == connection_get_prev_hop (c);
- connection_cancel_queues (c, !fwd);
-
- msg.header.size = htons (sizeof (struct GNUNET_MESH_ConnectionBroken));
- msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_CONNECTION_BROKEN);
- msg.cid = htonl (c->id);
- msg.tid = c->t->id;
- msg.peer1 = my_full_id;
- msg.peer2 = *GNUNET_PEER_resolve2 (peer->id);
- send_prebuilt_message_connection (&msg.header, c, NULL, fwd);
- c->destroy = GNUNET_YES;
-
- return GNUNET_YES;
-}
-
-/******************************************************************************/
-/**************** MESH NETWORK HANDLER HELPERS ***********************/
-/******************************************************************************/
-
-/**
- * Free a transmission that was already queued with all resources
- * associated to the request.
- *
- * @param queue Queue handler to cancel.
- * @param clear_cls Is it necessary to free associated cls?
- */
-static void
-queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
-{
- struct MeshPeer *peer;
- struct MeshFlowControl *fc;
- int fwd;
-
- fwd = queue->fwd;
- peer = queue->peer;
- GNUNET_assert (NULL != queue->c);
- fc = fwd ? &queue->c->fwd_fc : &queue->c->bck_fc;
-
- if (GNUNET_YES == clear_cls)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " queue destroy type %s\n",
- GNUNET_MESH_DEBUG_M2S (queue->type));
- switch (queue->type)
- {
- case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_DESTROY:
- case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "destroying a DESTROY message\n");
- GNUNET_break (GNUNET_YES == queue->c->destroy);
- /* fall through */
- case GNUNET_MESSAGE_TYPE_MESH_FWD:
- case GNUNET_MESSAGE_TYPE_MESH_BCK:
- case GNUNET_MESSAGE_TYPE_MESH_ACK:
- case GNUNET_MESSAGE_TYPE_MESH_POLL:
- case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK:
- case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE:
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " prebuilt message\n");;
- GNUNET_free_non_null (queue->cls);
- break;
-
- default:
- GNUNET_break (0);
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " type %s unknown!\n",
- GNUNET_MESH_DEBUG_M2S (queue->type));
- }
-
- }
- GNUNET_CONTAINER_DLL_remove (peer->queue_head, peer->queue_tail, queue);
-
- fc->queue_n--;
- peer->queue_n--;
- if (NULL != queue->c)
- {
- queue->c->pending_messages--;
- if (NULL != queue->c->t)
- {
- queue->c->t->pending_messages--;
- }
- }
-
- GNUNET_free (queue);
-}
-
-
-static size_t
-queue_send (void *cls, size_t size, void *buf)
-{
- struct MeshPeer *peer = cls;
- struct MeshFlowControl *fc;
- struct MeshConnection *c;
- struct GNUNET_MessageHeader *msg;
- struct MeshPeerQueue *queue;
- struct MeshTunnel2 *t;
- const struct GNUNET_PeerIdentity *dst_id;
- size_t data_size;
- uint32_t pid;
- uint16_t type;
- int fwd;
-
- 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;
- }
-
- /* Initialize */
- queue = peer_get_first_message (peer);
- if (NULL == queue)
- {
- GNUNET_break (0); /* Core tmt_rdy should've been canceled */
- return 0;
- }
- c = queue->c;
- fwd = queue->fwd;
- fc = fwd ? &c->fwd_fc : &c->bck_fc;
-
-
- dst_id = GNUNET_PEER_resolve2 (peer->id);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* towards %s\n", GNUNET_i2s (dst_id));
- /* Check if buffer size is enough for the message */
- if (queue->size > size)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not enough room, reissue\n");
- peer->core_transmit =
- GNUNET_CORE_notify_transmit_ready (core_handle,
- GNUNET_NO,
- 0,
- GNUNET_TIME_UNIT_FOREVER_REL,
- dst_id,
- queue->size,
- &queue_send,
- peer);
- return 0;
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* size ok\n");
-
- t = (NULL != c) ? c->t : NULL;
- type = 0;
-
- /* Fill buf */
- switch (queue->type)
- {
- case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_DESTROY:
- case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_BROKEN:
- case GNUNET_MESSAGE_TYPE_MESH_FWD:
- case GNUNET_MESSAGE_TYPE_MESH_BCK:
- case GNUNET_MESSAGE_TYPE_MESH_ACK:
- case GNUNET_MESSAGE_TYPE_MESH_POLL:
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "* raw: %s\n",
- GNUNET_MESH_DEBUG_M2S (queue->type));
- data_size = send_core_data_raw (queue->cls, size, buf);
- msg = (struct GNUNET_MessageHeader *) buf;
- type = ntohs (msg->type);
- break;
- case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE:
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path create\n");
- if (connection_is_origin (c, GNUNET_YES))
- data_size = send_core_connection_create (queue->c, size, buf);
- else
- data_size = send_core_data_raw (queue->cls, size, buf);
- break;
- case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK:
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path ack\n");
- if (connection_is_origin (c, GNUNET_NO))
- data_size = send_core_connection_ack (queue->c, size, buf);
- else
- data_size = send_core_data_raw (queue->cls, size, buf);
- break;
- case GNUNET_MESSAGE_TYPE_MESH_DATA:
- case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE:
- case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_DESTROY:
- /* This should be encapsulted */
- GNUNET_break (0);
- break;
- default:
- GNUNET_break (0);
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "* type unknown: %u\n",
- queue->type);
- data_size = 0;
- }
-
- if (0 < drop_percent &&
- GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK, 101) < drop_percent)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- "Dropping message of type %s\n",
- GNUNET_MESH_DEBUG_M2S (queue->type));
- data_size = 0;
- }
-
- /* Send ACK if needed, after accounting for sent ID in fc->queue_n */
- switch (type)
- {
- case GNUNET_MESSAGE_TYPE_MESH_FWD:
- case GNUNET_MESSAGE_TYPE_MESH_BCK:
- pid = ntohl ( ((struct GNUNET_MESH_Encrypted *) buf)->pid );
- fc->last_pid_sent = pid;
- if (NULL != queue->ch)
- channel_send_client_ack (queue->ch, fwd);
- else
- connection_send_ack (c, fwd);
- break;
- default:
- break;
- }
-
- /* Free queue, but cls was freed by send_core_* */
- queue_destroy (queue, GNUNET_NO);
-
- /* If more data in queue, send next */
- queue = peer_get_first_message (peer);
- if (NULL != queue)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* more data!\n");
- 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 (GNUNET_SCHEDULER_NO_TASK == fc->poll_task)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "* %s starting poll timeout\n");
- fc->poll_task =
- GNUNET_SCHEDULER_add_delayed (fc->poll_time, &connection_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 (NULL != c)
- {
- c->pending_messages--;
- if (GNUNET_YES == c->destroy && 0 == c->pending_messages)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* destroying connection!\n");
- connection_destroy (c);
- }
- }
-
- if (NULL != t)
- {
- t->pending_messages--;
- 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;
-}
-
-
-static void
-queue_add (void *cls, uint16_t type, size_t size,
- struct MeshConnection *c,
- struct MeshChannel *ch,
- int fwd)
-{
- struct MeshPeerQueue *queue;
- struct MeshFlowControl *fc;
- struct MeshPeer *peer;
- int priority;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "queue add %s %s (%u) on c %p, ch %p\n",
- fwd ? "FWD" : "BCK", GNUNET_MESH_DEBUG_M2S (type), size, c, ch);
- GNUNET_assert (NULL != c);
-
- fc = fwd ? &c->fwd_fc : &c->bck_fc;
- peer = fwd ? connection_get_next_hop (c) : connection_get_prev_hop (c);
-
- if (NULL == fc)
- {
- GNUNET_break (0);
- return;
- }
-
- priority = 0;
-
- if (GNUNET_MESSAGE_TYPE_MESH_POLL == type ||
- GNUNET_MESSAGE_TYPE_MESH_ACK == type)
- priority = 100;
-
- if (NULL != ch &&
- ( (NULL != ch->root && GNUNET_MESSAGE_TYPE_MESH_FWD == type) ||
- (NULL != ch->dest && GNUNET_MESSAGE_TYPE_MESH_BCK == type) ))
- priority = 50;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "priority %d\n", priority);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "fc %p\n", fc);
- if (fc->queue_n >= fc->queue_max && 0 == priority)
- {
- 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, fc->queue_max);
- return; /* Drop this message */
- }
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "pid %u\n", fc->last_pid_sent);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "ack %u\n", fc->last_ack_recv);
- if (GMC_is_pid_bigger (fc->last_pid_sent + 1, fc->last_ack_recv) &&
- GNUNET_SCHEDULER_NO_TASK == fc->poll_task)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "no buffer space (%u > %u): starting poll\n",
- fc->last_pid_sent + 1, fc->last_ack_recv);
- fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
- &connection_poll,
- fc);
- }
- queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
- queue->cls = cls;
- queue->type = type;
- queue->size = size;
- queue->peer = peer;
- queue->c = c;
- queue->ch = ch;
- queue->fwd = fwd;
- if (100 <= priority)
- GNUNET_CONTAINER_DLL_insert (peer->queue_head, peer->queue_tail, queue);
- else
- GNUNET_CONTAINER_DLL_insert_tail (peer->queue_head, peer->queue_tail, queue);
-
- if (NULL == peer->core_transmit)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "calling core tmt rdy towards %s\n",
- peer2s (peer));
- peer->core_transmit =
- GNUNET_CORE_notify_transmit_ready (core_handle,
- 0,
- 0,
- GNUNET_TIME_UNIT_FOREVER_REL,
- GNUNET_PEER_resolve2 (peer->id),
- size,
- &queue_send,
- peer);
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "core tmt rdy towards %s already called\n",
- peer2s (peer));
-
- }
- c->pending_messages++;
- c->t->pending_messages++;
- fc->queue_n++;
- peer->queue_n++;
-}
-
-
-/******************************************************************************/
-/******************** MESH NETWORK HANDLERS **************************/
-/******************************************************************************/
-
-
-/**
- * Generic handler for mesh network payload traffic.
- *
- * @param t Tunnel on which we got this message.
- * @param message Unencryted data message.
- * @param fwd Is this FWD traffic? GNUNET_YES : GNUNET_NO;
- *
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-handle_data (struct MeshTunnel2 *t, const struct GNUNET_MESH_Data *msg, int fwd)
-{
- struct MeshChannelReliability *rel;
- struct MeshChannel *ch;
- struct MeshClient *c;
- uint32_t mid;
- uint32_t *mid_recv;
- uint16_t type;
- size_t size;
-
- /* Check size */
- size = ntohs (msg->header.size);
- if (size <
- sizeof (struct GNUNET_MESH_Data) +
- sizeof (struct GNUNET_MessageHeader))
- {
- GNUNET_break (0);
- return GNUNET_OK;
- }
- type = ntohs (msg->header.type);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a %s message\n",
- GNUNET_MESH_DEBUG_M2S (type));
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " payload of type %s\n",
- GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
-
- /* Check channel */
- ch = channel_get (t, ntohl (msg->chid));
- if (NULL == ch)
- {
- GNUNET_STATISTICS_update (stats, "# data on unknown channel", 1, GNUNET_NO);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "WARNING channel unknown\n");
- return GNUNET_OK;
- }
-
- /* Initialize FWD/BCK data */
- c = fwd ? ch->dest : ch->root;
- rel = fwd ? ch->bck_rel : ch->fwd_rel;
- mid_recv = fwd ? &ch->mid_recv_fwd : &ch->mid_recv_bck;
-
- if (NULL == c)
- {
- GNUNET_break (0);
- return GNUNET_OK;
- }
-
- tunnel_change_state (t, MESH_TUNNEL_READY);
-
- GNUNET_STATISTICS_update (stats, "# data received", 1, GNUNET_NO);
-
- mid = ntohl (msg->mid);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " mid %u\n", mid);
-
- if (GNUNET_NO == ch->reliable ||
- ( !GMC_is_pid_bigger (*mid_recv, mid) &&
- GMC_is_pid_bigger (*mid_recv + 64, mid) ) )
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! RECV %u\n", mid);
- if (GNUNET_YES == ch->reliable)
- {
- /* Is this the exact next expected messasge? */
- if (mid == *mid_recv)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "as expected\n");
- *mid_recv = *mid_recv + 1;
- channel_send_client_data (ch, msg, fwd);
- channel_send_client_buffered_data (ch, c, rel);
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "save for later\n");
- channel_rel_add_buffered_data (msg, rel);
- }
- }
- else /* Tunnel unreliable, send to clients directly */
- {
- channel_send_client_data (ch, msg, fwd);
- }
- }
- else
- {
- GNUNET_break_op (0);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " MID %u not expected (%u - %u), dropping!\n",
- mid, *mid_recv, *mid_recv + 64);
- }
-
- channel_send_data_ack (ch, fwd);
- return GNUNET_OK;
-}
-
-/**
- * Handler for mesh network traffic end-to-end ACKs.
- *
- * @param t Tunnel on which we got this message.
- * @param message Data message.
- * @param fwd Is this a fwd ACK? (dest->orig)
- *
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-handle_data_ack (struct MeshTunnel2 *t,
- const struct GNUNET_MESH_DataACK *msg, int fwd)
-{
- struct MeshChannelReliability *rel;
- struct MeshReliableMessage *copy;
- struct MeshReliableMessage *next;
- struct MeshChannel *ch;
- uint32_t ack;
- uint16_t type;
- int work;
-
- type = ntohs (msg->header.type);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a %s message!\n",
- GNUNET_MESH_DEBUG_M2S (type));
- ch = channel_get (t, ntohl (msg->chid));
- if (NULL == ch)
- {
- GNUNET_STATISTICS_update (stats, "# ack on unknown channel", 1, GNUNET_NO);
- return GNUNET_OK;
- }
- ack = ntohl (msg->mid);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! %s ACK %u\n",
- (GNUNET_YES == fwd) ? "FWD" : "BCK", ack);
-
- if (GNUNET_YES == fwd)
- {
- rel = ch->fwd_rel;
- }
- else
- {
- rel = ch->bck_rel;
- }
- if (NULL == rel)
- {
- return GNUNET_OK;
- }
-
- for (work = GNUNET_NO, copy = rel->head_sent; copy != NULL; copy = next)
- {
- if (GMC_is_pid_bigger (copy->mid, ack))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! head %u, out!\n", copy->mid);
- channel_rel_free_sent (rel, msg);
- break;
- }
- work = GNUNET_YES;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! id %u\n", copy->mid);
- next = copy->next;
- rel_message_free (copy);
- }
- /* ACK client if needed */
-// channel_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)
- {
- GNUNET_SCHEDULER_cancel (rel->retry_task);
- if (NULL == rel->head_sent)
- {
- rel->retry_task = GNUNET_SCHEDULER_NO_TASK;
- }
- else
- {
- 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,
- delay);
- delay = GNUNET_TIME_absolute_get_remaining (new_target);
- rel->retry_task =
- GNUNET_SCHEDULER_add_delayed (delay,
- &channel_retransmit_message,
- rel);
- }
- }
- else
- GNUNET_break (0);
- }
- return GNUNET_OK;
-}
-
-
-/**
- * Core handler for connection creation.
- *
- * @param cls Closure (unused).
- * @param peer Sender (neighbor).
- * @param message Message.
- *
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-handle_mesh_connection_create (void *cls,
- const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_MESH_ConnectionCreate *msg;
- struct GNUNET_PeerIdentity *id;
- struct GNUNET_HashCode *tid;
- struct MeshPeerPath *path;
- struct MeshPeer *dest_peer;
- struct MeshPeer *orig_peer;
- struct MeshConnection *c;
- unsigned int own_pos;
- uint32_t cid;
- uint16_t size;
- uint16_t i;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a connection create msg\n");
-
- /* Check size */
- size = ntohs (message->size);
- if (size < sizeof (struct GNUNET_MESH_ConnectionCreate))
- {
- GNUNET_break_op (0);
- return GNUNET_OK;
- }
-
- /* Calculate hops */
- size -= sizeof (struct GNUNET_MESH_ConnectionCreate);
- if (size % sizeof (struct GNUNET_PeerIdentity))
- {
- GNUNET_break_op (0);
- return GNUNET_OK;
- }
- size /= sizeof (struct GNUNET_PeerIdentity);
- if (1 > size)
- {
- GNUNET_break_op (0);
- return GNUNET_OK;
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
-
- /* Get parameters */
- msg = (struct GNUNET_MESH_ConnectionCreate *) message;
- cid = ntohl (msg->cid);
- tid = &msg->tid;
- id = (struct GNUNET_PeerIdentity *) &msg[1];
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " connection %s[%X] (%s).\n",
- GNUNET_h2s (tid), cid, GNUNET_i2s (id));
-
- /* Create connection */
- c = connection_get (tid, cid);
- if (NULL == c)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating connection\n");
- c = connection_new (tid, cid);
- if (NULL == c)
- return GNUNET_OK;
- }
- connection_reset_timeout (c, GNUNET_YES);
- tunnel_change_state (c->t, MESH_TUNNEL_WAITING);
-
- /* Remember peers */
- dest_peer = peer_get (&id[size - 1]);
- orig_peer = peer_get (&id[0]);
-
- /* Create path */
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
- path = path_new (size);
- own_pos = 0;
- for (i = 0; i < size; i++)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
- GNUNET_i2s (&id[i]));
- path->peers[i] = GNUNET_PEER_intern (&id[i]);
- if (path->peers[i] == myid)
- own_pos = i;
- }
- if (own_pos == 0 && path->peers[own_pos] != myid)
- {
- /* create path: self not found in path through self */
- GNUNET_break_op (0);
- path_destroy (path);
- connection_destroy (c);
- return GNUNET_OK;
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
- path_add_to_peers (path, GNUNET_NO);
- c->path = path_duplicate (path);
- c->own_pos = own_pos;
-
- /* Is it a connection to us? */
- if (own_pos == size - 1)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
- peer_add_path_to_origin (orig_peer, path, GNUNET_YES);
-
- send_connection_ack (c, GNUNET_NO);
-
- /* Keep tunnel alive in direction dest->owner*/
- connection_reset_timeout (c, GNUNET_NO);
- }
- else
- {
- /* It's for somebody else! Retransmit. */
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
- peer_add_path (dest_peer, path_duplicate (path), GNUNET_NO);
- peer_add_path_to_origin (orig_peer, path, GNUNET_NO);
- send_prebuilt_message_connection (message, c, NULL, GNUNET_YES);
- }
- return GNUNET_OK;
-}
-
-
-/**
- * Core handler for path ACKs
- *
- * @param cls closure
- * @param message message
- * @param peer peer identity this notification is about
- *
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-handle_mesh_connection_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_MESH_ConnectionACK *msg;
- struct MeshPeerPath *p;
- struct MeshConnection *c;
- uint32_t cid;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a connection ACK msg\n");
- msg = (struct GNUNET_MESH_ConnectionACK *) message;
- cid = ntohl(msg->cid);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on connection %s[%X]\n",
- GNUNET_h2s (&msg->tid), cid);
- c = connection_get (&msg->tid, cid);
- if (NULL == c)
- {
- GNUNET_STATISTICS_update (stats, "# control on unknown connection",
- 1, GNUNET_NO);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the connection!\n");
- return GNUNET_OK;
- }
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
- GNUNET_i2s (peer));
-
- /* Add path to peers? */
- p = c->path;
- if (NULL != p)
- {
- path_add_to_peers (p, GNUNET_YES);
- }
- else
- {
- GNUNET_break (0);
- }
- connection_change_state (c, MESH_CONNECTION_READY);
- connection_reset_timeout (c, GNUNET_NO);
- if (MESH_TUNNEL_READY != c->t->state)
- tunnel_change_state (c->t, MESH_TUNNEL_READY);
- tunnel_send_queued_data (c->t, GNUNET_YES);
-
- /* Message for us? */
- if (connection_is_terminal (c, GNUNET_NO))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
- if (3 <= tunnel_count_connections (c->t) && NULL != c->t->peer->dhtget)
- {
- GNUNET_DHT_get_stop (c->t->peer->dhtget);
- c->t->peer->dhtget = NULL;
- }
- //connection_send_ack (c, GNUNET_NO); /* FIXME */
- return GNUNET_OK;
- }
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not for us, retransmitting...\n");
- send_prebuilt_message_connection (message, c, NULL, GNUNET_NO);
- return GNUNET_OK;
-}
-
-
-/**
- * Core handler for notifications of broken paths
- *
- * @param cls Closure (unused).
- * @param peer Peer identity of sending neighbor.
- * @param message Message.
- *
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-handle_mesh_connection_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_MESH_ConnectionBroken *msg;
- struct MeshConnection *c;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Received a CONNECTION BROKEN msg from %s\n", GNUNET_i2s (peer));
- msg = (struct GNUNET_MESH_ConnectionBroken *) message;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
- GNUNET_i2s (&msg->peer1));
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
- GNUNET_i2s (&msg->peer2));
- c = connection_get (&msg->tid, ntohl (msg->cid));
- if (NULL == c)
- {
- GNUNET_break_op (0);
- return GNUNET_OK;
- }
- tunnel_notify_connection_broken (c->t, GNUNET_PEER_search (&msg->peer1),
- GNUNET_PEER_search (&msg->peer2));
- return GNUNET_OK;
-
-}
-
-
-/**
- * Core handler for tunnel destruction
- *
- * @param cls Closure (unused).
- * @param peer Peer identity of sending neighbor.
- * @param message Message.
- *
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-handle_mesh_connection_destroy (void *cls,
- const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_MESH_ConnectionDestroy *msg;
- struct MeshConnection *c;
- GNUNET_PEER_Id id;
- int fwd;
-
- msg = (struct GNUNET_MESH_ConnectionDestroy *) message;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Got a CONNECTION DESTROY message from %s\n",
- GNUNET_i2s (peer));
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " for connection %s[%X]\n",
- GNUNET_h2s (&msg->tid), ntohl (msg->cid));
- c = connection_get (&msg->tid, ntohl (msg->cid));
- if (NULL == c)
- {
- /* Probably already got the message from another path,
- * destroyed the tunnel and retransmitted to children.
- * Safe to ignore.
- */
- GNUNET_STATISTICS_update (stats, "# control on unknown tunnel",
- 1, GNUNET_NO);
- return GNUNET_OK;
- }
- id = GNUNET_PEER_search (peer);
- if (id == connection_get_prev_hop (c)->id)
- fwd = GNUNET_YES;
- else if (id == connection_get_next_hop (c)->id)
- fwd = GNUNET_NO;
- else
- {
- GNUNET_break_op (0);
- return GNUNET_OK;
- }
- send_prebuilt_message_connection (message, c, NULL, fwd);
- c->destroy = GNUNET_YES;
-
- return GNUNET_OK;
-}
-
-
-/**
- * Handler for channel create messages.
- *
- * @param t Tunnel this channel is to be created in.
- * @param msg Message.
- * @param fwd Is this FWD traffic? GNUNET_YES : GNUNET_NO;
- *
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-handle_channel_create (struct MeshTunnel2 *t,
- struct GNUNET_MESH_ChannelCreate *msg,
- int fwd)
-{
- MESH_ChannelNumber chid;
- struct MeshChannel *ch;
- struct MeshClient *c;
- uint32_t port;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received Channel Create\n");
- /* Check message size */
- if (ntohs (msg->header.size) != sizeof (struct GNUNET_MESH_ChannelCreate))
- {
- GNUNET_break_op (0);
- return GNUNET_OK;
- }
-
- /* Check if channel exists */
- chid = ntohl (msg->chid);
- ch = channel_get (t, chid);
- if (NULL != ch)
- {
- /* Probably a retransmission, safe to ignore */
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " already exists...\n");
- }
- else
- {
- /* Create channel */
- ch = channel_new (t, NULL, 0);
- channel_set_options (ch, ntohl (msg->opt));
- }
-
- /* Find a destination client */
- port = ntohl (msg->port);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " port %u\n", port);
- c = GNUNET_CONTAINER_multihashmap32_get (ports, port);
- if (NULL == c)
- {
- /* TODO send reject */
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " no client has port registered\n");
- return GNUNET_OK;
- }
-
- channel_add_client (ch, c);
- if (GNUNET_YES == ch->reliable)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Reliable\n");
- ch->bck_rel = GNUNET_malloc (sizeof (struct MeshChannelReliability));
- ch->bck_rel->ch = ch;
- ch->bck_rel->expected_delay = MESH_RETRANSMIT_TIME;
- }
-
- send_local_channel_create (ch);
- channel_send_ack (ch, !fwd);
-
- return GNUNET_OK;
-}
-
-
-/**
- * Handler for channel ack messages.
- *
- * @param t Tunnel this channel is to be created in.
- * @param msg Message.
- * @param fwd Is this FWD traffic? GNUNET_YES : GNUNET_NO;
- *
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-handle_channel_ack (struct MeshTunnel2 *t,
- struct GNUNET_MESH_ChannelManage *msg,
- int fwd)
-{
- MESH_ChannelNumber chid;
- struct MeshChannel *ch;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received Channel ACK\n");
- /* Check message size */
- if (ntohs (msg->header.size) != sizeof (struct GNUNET_MESH_ChannelManage))
- {
- GNUNET_break_op (0);
- return GNUNET_OK;
- }
-
- /* Check if channel exists */
- chid = ntohl (msg->chid);
- ch = channel_get (t, chid);
- if (NULL == ch)
- {
- GNUNET_break_op (0);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " channel %u unknown!!\n", chid);
- return GNUNET_OK;
- }
-
- channel_confirm (ch, !fwd);
- return GNUNET_OK;
-}
-
-
-/**
- * Handler for channel destroy messages.
- *
- * @param t Tunnel this channel is to be destroyed of.
- * @param msg Message.
- * @param fwd Is this FWD traffic? GNUNET_YES : GNUNET_NO;
- *
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-handle_channel_destroy (struct MeshTunnel2 *t,
- struct GNUNET_MESH_ChannelManage *msg,
- int fwd)
-{
- MESH_ChannelNumber chid;
- struct MeshChannel *ch;
-
- /* Check message size */
- if (ntohs (msg->header.size) != sizeof (struct GNUNET_MESH_ChannelManage))
- {
- GNUNET_break_op (0);
- return GNUNET_OK;
- }
-
- /* Check if channel exists */
- chid = ntohl (msg->chid);
- ch = channel_get (t, chid);
- if (NULL == ch)
- {
- /* Probably a retransmission, safe to ignore */
- return GNUNET_OK;
- }
-
- send_local_channel_destroy (ch, fwd);
- channel_destroy (ch);
-
- return GNUNET_OK;
-}
-
-
-/**
- * Generic handler for mesh network encrypted traffic.
- *
- * @param peer Peer identity this notification is about.
- * @param message Encrypted message.
- * @param fwd Is this FWD traffic? GNUNET_YES : GNUNET_NO;
- *
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-handle_mesh_encrypted (const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_MESH_Encrypted *msg,
- int fwd)
-{
- struct MeshConnection *c;
- struct MeshTunnel2 *t;
- struct MeshPeer *neighbor;
- struct MeshFlowControl *fc;
- uint32_t pid;
- uint32_t ttl;
- uint16_t type;
- size_t size;
-
- /* Check size */
- size = ntohs (msg->header.size);
- if (size <
- sizeof (struct GNUNET_MESH_Encrypted) +
- sizeof (struct GNUNET_MessageHeader))
- {
- GNUNET_break (0);
- return GNUNET_OK;
- }
- type = ntohs (msg->header.type);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a %s message from %s\n",
- GNUNET_MESH_DEBUG_M2S (type), GNUNET_i2s (peer));
-
- /* Check connection */
- c = connection_get (&msg->tid, ntohl (msg->cid));
- if (NULL == c)
- {
- GNUNET_STATISTICS_update (stats, "# unknown connection", 1, GNUNET_NO);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "WARNING connection unknown\n");
- return GNUNET_OK;
- }
- t = c->t;
- fc = fwd ? &c->fwd_fc : &c->bck_fc;
-
- /* Check if origin is as expected */
- neighbor = connection_get_hop (c, fwd);
- if (peer_get (peer)->id != neighbor->id)
- {
- GNUNET_break_op (0);
- return GNUNET_OK;
- }
-
- /* Check PID */
- pid = ntohl (msg->pid);
- if (GMC_is_pid_bigger (pid, fc->last_ack_sent))
- {
- GNUNET_STATISTICS_update (stats, "# unsolicited message", 1, GNUNET_NO);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "WARNING Received PID %u, (prev %u), ACK %u\n",
- pid, fc->last_pid_recv, fc->last_ack_sent);
- return GNUNET_OK;
- }
- if (GNUNET_NO == GMC_is_pid_bigger (pid, fc->last_pid_recv))
- {
- GNUNET_STATISTICS_update (stats, "# duplicate PID", 1, GNUNET_NO);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " Pid %u not expected (%u+), dropping!\n",
- pid, fc->last_pid_recv + 1);
- return GNUNET_OK;
- }
- if (MESH_CONNECTION_SENT == c->state)
- connection_change_state (c, MESH_CONNECTION_READY);
- connection_reset_timeout (c, fwd);
- fc->last_pid_recv = pid;
-
- /* Is this message for us? */
- if (connection_is_terminal (c, fwd))
- {
- size_t dsize = size - sizeof (struct GNUNET_MESH_Encrypted);
- char cbuf[dsize];
- struct GNUNET_MessageHeader *msgh;
- int r;
-
- /* TODO signature verification */
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " it's for us!\n");
- GNUNET_STATISTICS_update (stats, "# messages received", 1, GNUNET_NO);
-
- fc->last_pid_recv = pid;
- tunnel_decrypt (t, cbuf, &msg[1], dsize, msg->iv, fwd);
- msgh = (struct GNUNET_MessageHeader *) cbuf;
- switch (ntohs (msgh->type))
- {
- case GNUNET_MESSAGE_TYPE_MESH_DATA_ACK:
- r = handle_data_ack (t, (struct GNUNET_MESH_DataACK *) msgh, fwd);
- break;
-
- case GNUNET_MESSAGE_TYPE_MESH_DATA:
- r = handle_data (t, (struct GNUNET_MESH_Data *) msgh, fwd);
- break;
-
- case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE:
- r = handle_channel_create (t,
- (struct GNUNET_MESH_ChannelCreate *) msgh,
- fwd);
- break;
-
- case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_ACK:
- r = handle_channel_ack (t,
- (struct GNUNET_MESH_ChannelManage *) msgh,
- fwd);
- break;
-
- case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_DESTROY:
- r = handle_channel_destroy (t,
- (struct GNUNET_MESH_ChannelManage *) msgh,
- fwd);
- break;
-
- default:
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "end-to-end message not known (%u)\n",
- ntohs (msgh->type));
- r = GNUNET_OK;
- }
-
- connection_send_ack (c, fwd);
- return r;
- }
-
- /* Message not for us: forward to next hop */
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not for us, retransmitting...\n");
- 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");
- connection_send_ack (c, fwd);
- return GNUNET_OK;
- }
- GNUNET_STATISTICS_update (stats, "# messages forwarded", 1, GNUNET_NO);
-
- send_prebuilt_message_connection (&msg->header, c, NULL, fwd);
-
- return GNUNET_OK;
-}
-
-
-/**
- * Core handler for mesh network traffic going orig->dest.
- *
- * @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_fwd (void *cls, const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_MessageHeader *message)
-{
- return handle_mesh_encrypted (peer,
- (struct GNUNET_MESH_Encrypted *)message,
- GNUNET_YES);
-}
-
-/**
- * Core handler for mesh network traffic going dest->orig.
- *
- * @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_bck (void *cls, const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_MessageHeader *message)
-{
- return handle_mesh_encrypted (peer,
- (struct GNUNET_MESH_Encrypted *)message,
- GNUNET_NO);
-}
-
-
-/**
- * Core handler for mesh network traffic point-to-point acks.
- *
- * @param cls closure
- * @param message message
- * @param peer peer identity this notification is about
- *
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_MESH_ACK *msg;
- struct MeshConnection *c;
- struct MeshFlowControl *fc;
- GNUNET_PEER_Id id;
- uint32_t ack;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
- GNUNET_i2s (peer));
- msg = (struct GNUNET_MESH_ACK *) message;
-
- c = connection_get (&msg->tid, ntohl (msg->cid));
-
- if (NULL == c)
- {
- GNUNET_STATISTICS_update (stats, "# ack on unknown connection", 1,
- GNUNET_NO);
- return GNUNET_OK;
- }
-
- ack = ntohl (msg->ack);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
-
- /* Is this a forward or backward ACK? */
- id = GNUNET_PEER_search (peer);
- if (connection_get_next_hop (c)->id == id)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
- fc = &c->fwd_fc;
- }
- else if (connection_get_prev_hop (c)->id == id)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
- fc = &c->bck_fc;
- }
- else
- {
- GNUNET_break_op (0);
- return GNUNET_OK;
- }
-
- /* Cancel polling if the ACK is bigger than before. */
- if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task &&
- GMC_is_pid_bigger (ack, fc->last_ack_recv))
- {
- GNUNET_SCHEDULER_cancel (fc->poll_task);
- fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
- fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
- }
-
- fc->last_ack_recv = ack;
- connection_unlock_queue (c, fc == &c->fwd_fc);
-
- return GNUNET_OK;
-}
-
-
-/**
- * Core handler for mesh network traffic point-to-point ack polls.
- *
- * @param cls closure
- * @param message message
- * @param peer peer identity this notification is about
- *
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_MESH_Poll *msg;
- struct MeshConnection *c;
- struct MeshFlowControl *fc;
- GNUNET_PEER_Id id;
- uint32_t pid;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a POLL packet from %s!\n",
- GNUNET_i2s (peer));
-
- msg = (struct GNUNET_MESH_Poll *) message;
-
- c = connection_get (&msg->tid, ntohl (msg->cid));
-
- if (NULL == c)
- {
- GNUNET_STATISTICS_update (stats, "# poll on unknown connection", 1,
- GNUNET_NO);
- GNUNET_break_op (0);
- return GNUNET_OK;
- }
-
- /* Is this a forward or backward ACK? */
- id = GNUNET_PEER_search (peer);
- if (connection_get_next_hop (c)->id == id)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
- fc = &c->fwd_fc;
- }
- else if (connection_get_prev_hop (c)->id == id)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
- fc = &c->bck_fc;
- }
- else
- {
- GNUNET_break_op (0);
- return GNUNET_OK;
- }
-
- pid = ntohl (msg->pid);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PID %u, OLD %u\n",
- pid, fc->last_pid_recv);
- fc->last_pid_recv = pid;
- connection_send_ack (c, fc == &c->fwd_fc);
-
- return GNUNET_OK;
-}
-
-
-/**
- * Core handler for mesh keepalives.
- *
- * @param cls closure
- * @param message message
- * @param peer peer identity this notification is about
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- *
- * TODO: Check who we got this from, to validate route.
- */
-static int
-handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_MESH_ConnectionKeepAlive *msg;
- struct MeshConnection *c;
- struct MeshPeer *neighbor;
- int fwd;
-
- msg = (struct GNUNET_MESH_ConnectionKeepAlive *) message;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n",
- GNUNET_i2s (peer));
-
- c = connection_get (&msg->tid, ntohl (msg->cid));
- if (NULL == c)
- {
- GNUNET_STATISTICS_update (stats, "# keepalive on unknown connection", 1,
- GNUNET_NO);
- return GNUNET_OK;
- }
-
- fwd = GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE == ntohs (message->type) ?
- GNUNET_YES : GNUNET_NO;
-
- /* Check if origin is as expected */
- neighbor = connection_get_hop (c, fwd);
- if (peer_get (peer)->id != neighbor->id)
- {
- GNUNET_break_op (0);
- return GNUNET_OK;
- }
-
- connection_change_state (c, MESH_CONNECTION_READY);
- connection_reset_timeout (c, fwd);
-
- if (connection_is_terminal (c, fwd))
- return GNUNET_OK;
-
- GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO);
- send_prebuilt_message_connection (message, c, NULL, fwd);
-
- return GNUNET_OK;
-}
-
-
-
-/**
- * Functions to handle messages from core
- */
-static struct GNUNET_CORE_MessageHandler core_handlers[] = {
- {&handle_mesh_connection_create, GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE,
- 0},
- {&handle_mesh_connection_ack, GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK,
- sizeof (struct GNUNET_MESH_ConnectionACK)},
- {&handle_mesh_connection_broken, GNUNET_MESSAGE_TYPE_MESH_CONNECTION_BROKEN,
- sizeof (struct GNUNET_MESH_ConnectionBroken)},
- {&handle_mesh_connection_destroy, GNUNET_MESSAGE_TYPE_MESH_CONNECTION_DESTROY,
- sizeof (struct GNUNET_MESH_ConnectionDestroy)},
- {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE,
- sizeof (struct GNUNET_MESH_ConnectionKeepAlive)},
- {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE,
- sizeof (struct GNUNET_MESH_ConnectionKeepAlive)},
- {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
- sizeof (struct GNUNET_MESH_ACK)},
- {&handle_mesh_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
- sizeof (struct GNUNET_MESH_Poll)},
- {&handle_mesh_fwd, GNUNET_MESSAGE_TYPE_MESH_FWD, 0},
- {&handle_mesh_bck, GNUNET_MESSAGE_TYPE_MESH_BCK, 0},
- {NULL, 0, 0}
-};
-
-
-/**
- * Function to process paths received for a new peer addition. The recorded
- * paths form the initial tunnel, which can be optimized later.
- * Called on each result obtained for the DHT search.
*
- * @param cls closure
- * @param exp when will this value expire
- * @param key key of the result
- * @param get_path path of the get request
- * @param get_path_length lenght of get_path
- * @param put_path path of the put request
- * @param put_path_length length of the put_path
- * @param type type of the result
- * @param size number of bytes in data
- * @param data pointer to the result data
+ * Dictionary:
+ * - peer: other mesh instance. If there is direct connection it's a neighbor.
+ * - tunnel: encrypted connection to a peer, neighbor or not.
+ * - channel: connection between two clients, on the same or different peers.
+ * have properties like reliability.
+ * - path: series of directly connected peer from one peer to another.
+ * - connection: path which is being used in a tunnel.
*/
-static void
-dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
- const struct GNUNET_HashCode * key,
- const struct GNUNET_PeerIdentity *get_path,
- unsigned int get_path_length,
- const struct GNUNET_PeerIdentity *put_path,
- unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
- size_t size, const void *data)
-{
- struct MeshPeer *peer = cls;
- struct MeshPeerPath *p;
- struct MeshConnection *c;
- struct GNUNET_PeerIdentity pi;
- int i;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
- GNUNET_PEER_resolve (peer->id, &pi);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
-
- p = path_build_from_dht (get_path, get_path_length,
- put_path, put_path_length);
- path_add_to_peers (p, GNUNET_NO);
- path_destroy (p);
- /* Count connections */
- for (c = peer->tunnel->connection_head, i = 0; NULL != c; c = c->next, i++);
-
- /* If we already have 3 (or more (?!)) connections, it's enough */
- if (3 <= i)
- return;
+#include "platform.h"
+#include "gnunet_util_lib.h"
+#include "mesh_enc.h"
+#include "block_mesh.h"
+#include "gnunet_statistics_service.h"
- if (peer->tunnel->state == MESH_TUNNEL_SEARCHING)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... connect!\n");
- peer_connect (peer);
- }
- return;
-}
+#include "gnunet-service-mesh_local.h"
+#include "gnunet-service-mesh_channel.h"
+#include "gnunet-service-mesh_connection.h"
+#include "gnunet-service-mesh_tunnel.h"
+#include "gnunet-service-mesh_dht.h"
+#include "gnunet-service-mesh_peer.h"
/******************************************************************************/
-/********************* MESH LOCAL HANDLES **************************/
+/************************ DATA STRUCTURES ****************************/
/******************************************************************************/
-/**
- * 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;
- c->id = next_client_id++; /* overflow not important: just for debug */
- 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
- *
- * @param cls closure
- * @param client identification of the client; NULL
- * for the last call when the server is destroyed
- */
-static void
-handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
-{
- struct MeshClient *c;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected: %p\n", client);
- if (client == NULL)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
- return;
- }
-
- c = client_get (client);
- if (NULL != c)
- {
- 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;
- if (NULL != c->own_channels)
- {
- GNUNET_CONTAINER_multihashmap32_iterate (c->own_channels,
- &channel_destroy_iterator, c);
- GNUNET_CONTAINER_multihashmap32_destroy (c->own_channels);
- }
-
- if (NULL != c->incoming_channels)
- {
- GNUNET_CONTAINER_multihashmap32_iterate (c->incoming_channels,
- &channel_destroy_iterator, c);
- GNUNET_CONTAINER_multihashmap32_destroy (c->incoming_channels);
- }
-
- if (NULL != c->ports)
- {
- GNUNET_CONTAINER_multihashmap32_iterate (c->ports,
- &client_release_ports, c);
- GNUNET_CONTAINER_multihashmap32_destroy (c->ports);
- }
- GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c);
- GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client free (%p)\n", c);
- GNUNET_free (c);
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " context NULL!\n");
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "done!\n");
- return;
-}
-
-
-/**
- * Handler for new clients
- *
- * @param cls closure
- * @param client identification of the client
- * @param message the actual message, which includes messages the client wants
- */
-static void
-handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_MESH_ClientConnect *cc_msg;
- struct MeshClient *c;
- unsigned int size;
- uint32_t *p;
- unsigned int i;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected %p\n", client);
-
- /* Check data sanity */
- size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
- cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
- if (0 != (size % sizeof (uint32_t)))
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
- size /= sizeof (uint32_t);
-
- /* Initialize new client structure */
- c = GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client id %u\n", c->id);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client has %u ports\n", size);
- if (size > 0)
- {
- uint32_t u32;
-
- p = (uint32_t *) &cc_msg[1];
- c->ports = GNUNET_CONTAINER_multihashmap32_create (size);
- for (i = 0; i < size; i++)
- {
- u32 = ntohl (p[i]);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " port: %u\n", u32);
-
- /* store in client's hashmap */
- GNUNET_CONTAINER_multihashmap32_put (c->ports, u32, c,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
- /* store in global hashmap */
- /* FIXME only allow one client to have the port open,
- * have a backup hashmap with waiting clients */
- GNUNET_CONTAINER_multihashmap32_put (ports, u32, c,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
- }
- }
-
- c->own_channels = GNUNET_CONTAINER_multihashmap32_create (32);
- c->incoming_channels = GNUNET_CONTAINER_multihashmap32_create (32);
- GNUNET_SERVER_notification_context_add (nc, client);
- GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
-
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
-}
-
-
-/**
- * Handler for requests of new tunnels
- *
- * @param cls Closure.
- * @param client Identification of the client.
- * @param message The actual message.
- */
-static void
-handle_local_channel_create (void *cls, struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_MESH_ChannelMessage *msg;
- struct MeshPeer *peer;
- struct MeshTunnel2 *t;
- struct MeshChannel *ch;
- struct MeshClient *c;
- MESH_ChannelNumber chid;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new channel requested\n");
-
- /* Sanity check for client registration */
- if (NULL == (c = client_get (client)))
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
-
- /* Message size sanity check */
- if (sizeof (struct GNUNET_MESH_ChannelMessage) != ntohs (message->size))
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
-
- msg = (struct GNUNET_MESH_ChannelMessage *) message;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " towards %s:%u\n",
- GNUNET_i2s (&msg->peer), ntohl (msg->port));
- chid = ntohl (msg->channel_id);
-
- /* Sanity check for duplicate channel IDs */
- if (NULL != channel_get_by_local_id (c, chid))
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
-
- peer = peer_get (&msg->peer);
- if (NULL == peer->tunnel)
- {
- struct GNUNET_HashCode tid;
-
- GNUNET_CRYPTO_hash_create_random (GNUNET_CRYPTO_QUALITY_NONCE, &tid);
- peer->tunnel = tunnel_new (&tid);
- peer->tunnel->peer = peer;
- }
- t = peer->tunnel;
-
- /* Create channel */
- ch = channel_new (t, c, chid);
- if (NULL == ch)
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
- ch->port = ntohl (msg->port);
- channel_set_options (ch, ntohl (msg->opt));
-
- /* In unreliable channels, we'll use the DLL to buffer data for the root */
- ch->fwd_rel = GNUNET_malloc (sizeof (struct MeshChannelReliability));
- ch->fwd_rel->ch = ch;
- ch->fwd_rel->expected_delay = MESH_RETRANSMIT_TIME;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED CHANNEL %s[%x]:%u (%x)\n",
- GNUNET_h2s (&t->id), ch->gid, ch->port, ch->lid_root);
- peer_connect (peer);
-
- /* Send create channel */
- {
- struct GNUNET_MESH_ChannelCreate msgcc;
-
- msgcc.header.size = htons (sizeof (msgcc));
- msgcc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE);
- msgcc.chid = htonl (ch->gid);
- msgcc.port = msg->port;
- msgcc.opt = msg->opt;
-
- tunnel_queue_data (t, ch, &msgcc.header, GNUNET_YES);
- }
-
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
- return;
-}
-
-
-/**
- * Handler for requests of deleting tunnels
- *
- * @param cls closure
- * @param client identification of the client
- * @param message the actual message
- */
-static void
-handle_local_channel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_MESH_ChannelMessage *msg;
- struct MeshClient *c;
- struct MeshChannel *ch;
- struct MeshTunnel2 *t;
- MESH_ChannelNumber chid;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Got a DESTROY CHANNEL from client!\n");
-
- /* Sanity check for client registration */
- if (NULL == (c = client_get (client)))
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
-
- /* Message sanity check */
- if (sizeof (struct GNUNET_MESH_ChannelMessage) != ntohs (message->size))
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
-
- msg = (struct GNUNET_MESH_ChannelMessage *) message;
-
- /* Retrieve tunnel */
- chid = ntohl (msg->channel_id);
- ch = channel_get_by_local_id (c, chid);
- if (NULL == ch)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " channel %X not found\n", chid);
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
-
- /* Cleanup after the tunnel */
- client_delete_channel (c, ch);
- if (c == ch->dest && GNUNET_MESH_LOCAL_CHANNEL_ID_SERV <= chid)
- {
- ch->dest = NULL;
- }
- else if (c == ch->root && GNUNET_MESH_LOCAL_CHANNEL_ID_SERV > chid)
- {
- ch->root = NULL;
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- " channel %X client %p (%p, %p)\n",
- chid, c, ch->root, ch->dest);
- GNUNET_break (0);
- }
-
- t = ch->t;
- channel_destroy (ch);
- tunnel_destroy_if_empty (t);
-
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
- return;
-}
-
-
-/**
- * Handler for client traffic
- *
- * @param cls closure
- * @param client identification of the client
- * @param message the actual message
- */
-static void
-handle_local_data (void *cls, struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_MESH_LocalData *msg;
- struct MeshClient *c;
- struct MeshChannel *ch;
- MESH_ChannelNumber chid;
- size_t size;
- int fwd;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Got data from a client!\n");
-
- /* Sanity check for client registration */
- if (NULL == (c = client_get (client)))
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
- msg = (struct GNUNET_MESH_LocalData *) message;
-
- /* Sanity check for message size */
- size = ntohs (message->size) - sizeof (struct GNUNET_MESH_LocalData);
- if (size < sizeof (struct GNUNET_MessageHeader))
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
-
- /* Channel exists? */
- chid = ntohl (msg->id);
- fwd = chid < GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
- ch = channel_get_by_local_id (c, chid);
- if (NULL == ch)
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
-
- /* Is the client in the channel? */
- if ( !( (fwd &&
- ch->root &&
- ch->root->handle == client)
- ||
- (!fwd &&
- ch->dest &&
- ch->dest->handle == client) ) )
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
-
- if (fwd)
- ch->blocked_fwd = GNUNET_YES;
- else
- ch->blocked_bck = GNUNET_YES;
-
- /* Ok, everything is correct, send the message. */
- {
- struct GNUNET_MESH_Data *payload;
- uint16_t p2p_size = sizeof(struct GNUNET_MESH_Data) + size;
- unsigned char cbuf[p2p_size];
- uint32_t *mid;
-
- mid = fwd ? &ch->mid_send_fwd : &ch->mid_send_bck;
- payload = (struct GNUNET_MESH_Data *) cbuf;
- payload->mid = htonl (*mid);
- *mid = *mid + 1;
- memcpy (&payload[1], &msg[1], size);
- payload->header.size = htons (p2p_size);
- payload->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_DATA);
- payload->chid = htonl (ch->gid);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending on channel...\n");
- send_prebuilt_message_channel (&payload->header, ch, fwd);
-
- if (GNUNET_YES == ch->reliable)
- channel_save_copy (ch, &payload->header, fwd);
- }
- if (tunnel_get_buffer (ch->t, fwd) > 0)
- send_local_ack (ch, c, fwd);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
-
- return;
-}
-
-
-/**
- * Handler for client's ACKs for payload traffic.
- *
- * @param cls Closure (unused).
- * @param client Identification of the client.
- * @param message The actual message.
- */
-static void
-handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_MESH_LocalAck *msg;
- struct MeshChannelReliability *rel;
- struct MeshChannel *ch;
- struct MeshClient *c;
- MESH_ChannelNumber chid;
- int fwd;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
-
- /* Sanity check for client registration */
- if (NULL == (c = client_get (client)))
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
-
- msg = (struct GNUNET_MESH_LocalAck *) message;
-
- /* Channel exists? */
- chid = ntohl (msg->channel_id);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on channel %X\n", chid);
- ch = channel_get_by_local_id (c, chid);
- if (NULL == ch)
- {
- GNUNET_break (0);
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Channel %X unknown.\n", chid);
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
-
- fwd = chid < GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
- rel = fwd ? ch->fwd_rel : ch->bck_rel;
-
- rel->client_ready = GNUNET_YES;
- channel_send_client_buffered_data (ch, c, rel);
- channel_send_connection_ack (ch, 64 - rel->n_recv, fwd);
-
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
-
- return;
-}
-
-
-/**
- * Iterator over all tunnels to send a monitoring client info about each tunnel.
- *
- * @param cls Closure (client handle).
- * @param key Key (hashed tunnel ID, unused).
- * @param value Tunnel info.
- *
- * @return GNUNET_YES, to keep iterating.
- */
-static int
-monitor_all_tunnels_iterator (void *cls,
- const struct GNUNET_HashCode * key,
- void *value)
-{
- struct GNUNET_SERVER_Client *client = cls;
- struct MeshChannel *ch = value;
- struct GNUNET_MESH_LocalMonitor *msg;
-
- msg = GNUNET_malloc (sizeof(struct GNUNET_MESH_LocalMonitor));
- msg->channel_id = htonl (ch->gid);
- msg->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
- msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
-
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "* sending info about tunnel %s\n",
- GNUNET_i2s (&msg->owner));
-
- GNUNET_SERVER_notification_context_unicast (nc, client,
- &msg->header, GNUNET_NO);
- return GNUNET_YES;
-}
-
-
-/**
- * Handler for client's MONITOR request.
- *
- * @param cls Closure (unused).
- * @param client Identification of the client.
- * @param message The actual message.
- */
-static void
-handle_local_get_tunnels (void *cls, struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
-{
- struct MeshClient *c;
+/******************************************************************************/
+/************************ DEBUG FUNCTIONS ****************************/
+/******************************************************************************/
- /* Sanity check for client registration */
- if (NULL == (c = client_get (client)))
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "Received get tunnels request from client %u\n",
- c->id);
- GNUNET_CONTAINER_multihashmap_iterate (tunnels,
- monitor_all_tunnels_iterator,
- client);
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "Get tunnels request from client %u completed\n",
- c->id);
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
-}
+/******************************************************************************/
+/*********************** GLOBAL VARIABLES ****************************/
+/******************************************************************************/
+/****************************** Global variables ******************************/
/**
- * Handler for client's MONITOR_TUNNEL request.
- *
- * @param cls Closure (unused).
- * @param client Identification of the client.
- * @param message The actual message.
+ * Handle to the statistics service.
*/
-static void
-handle_local_show_tunnel (void *cls, struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
-{
- const struct GNUNET_MESH_LocalMonitor *msg;
- struct GNUNET_MESH_LocalMonitor *resp;
- struct MeshClient *c;
- struct MeshChannel *ch;
-
- /* Sanity check for client registration */
- if (NULL == (c = client_get (client)))
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
-
- msg = (struct GNUNET_MESH_LocalMonitor *) message;
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "Received tunnel info request from client %u for tunnel %s[%X]\n",
- c->id,
- &msg->owner,
- ntohl (msg->channel_id));
-// ch = channel_get (&msg->owner, ntohl (msg->channel_id));
- ch = NULL; // FIXME
- if (NULL == ch)
- {
- /* We don't know the tunnel */
- struct GNUNET_MESH_LocalMonitor warn;
-
- warn = *msg;
- GNUNET_SERVER_notification_context_unicast (nc, client,
- &warn.header,
- GNUNET_NO);
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
- return;
- }
-
- /* Initialize context */
- resp = GNUNET_malloc (sizeof (struct GNUNET_MESH_LocalMonitor));
- *resp = *msg;
- resp->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
- GNUNET_SERVER_notification_context_unicast (nc, c->handle,
- &resp->header, GNUNET_NO);
- GNUNET_free (resp);
-
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "Monitor tunnel request from client %u completed\n",
- c->id);
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
-}
-
+struct GNUNET_STATISTICS_Handle *stats;
/**
- * Functions to handle messages from clients
+ * Local peer own ID (memory efficient handle).
*/
-static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
- {&handle_local_new_client, NULL,
- GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
- {&handle_local_channel_create, NULL,
- GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE,
- sizeof (struct GNUNET_MESH_ChannelMessage)},
- {&handle_local_channel_destroy, NULL,
- GNUNET_MESSAGE_TYPE_MESH_CHANNEL_DESTROY,
- sizeof (struct GNUNET_MESH_ChannelMessage)},
- {&handle_local_data, NULL,
- GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA, 0},
- {&handle_local_ack, NULL,
- GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
- sizeof (struct GNUNET_MESH_LocalAck)},
- {&handle_local_get_tunnels, NULL,
- GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS,
- sizeof (struct GNUNET_MessageHeader)},
- {&handle_local_show_tunnel, NULL,
- GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL,
- sizeof (struct GNUNET_MESH_LocalMonitor)},
- {NULL, NULL, 0, 0}
-};
-
+GNUNET_PEER_Id myid;
/**
- * Method called whenever a given peer connects.
- *
- * @param cls closure
- * @param peer peer identity this notification is about
+ * Local peer own ID (full value).
*/
-static void
-core_connect (void *cls, const struct GNUNET_PeerIdentity *peer)
-{
- struct MeshPeer *pi;
- struct MeshPeerPath *path;
-
- DEBUG_CONN ("Peer connected\n");
- DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
- pi = peer_get (peer);
- if (myid == pi->id)
- {
- DEBUG_CONN (" (self)\n");
- path = path_new (1);
- }
- else
- {
- DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
- path = path_new (2);
- path->peers[1] = pi->id;
- GNUNET_PEER_change_rc (pi->id, 1);
- GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
- }
- path->peers[0] = myid;
- GNUNET_PEER_change_rc (myid, 1);
- peer_add_path (pi, path, GNUNET_YES);
-
- pi->connections = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_YES);
- return;
-}
+struct GNUNET_PeerIdentity my_full_id;
+/*************************** Static global variables **************************/
/**
- * Method called whenever a peer disconnects.
- *
- * @param cls closure
- * @param peer peer identity this notification is about
+ * Own private key.
*/
-static void
-core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
-{
- struct MeshPeer *pi;
+static struct GNUNET_CRYPTO_EddsaPrivateKey *my_private_key;
- DEBUG_CONN ("Peer disconnected\n");
- pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
- if (NULL == pi)
- {
- GNUNET_break (0);
- return;
- }
- peer_remove_path (pi, myid, pi->id);
+/******************************************************************************/
+/*********************** DECLARATIONS **************************/
+/******************************************************************************/
- GNUNET_CONTAINER_multihashmap_iterate (pi->connections,
- connection_broken,
- pi);
- GNUNET_CONTAINER_multihashmap_destroy (pi->connections);
- pi->connections = NULL;
- if (myid == pi->id)
- {
- DEBUG_CONN (" (self)\n");
- }
- GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
- return;
-}
+/******************************************************************************/
+/****************** GENERAL HELPER FUNCTIONS ************************/
+/******************************************************************************/
-/**
- * Install server (service) handlers and start listening to clients.
- */
-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);
- clients_head = NULL;
- clients_tail = NULL;
- next_client_id = 0;
- GNUNET_SERVER_resume (server_handle);
-}
+/******************************************************************************/
+/**************** MESH NETWORK HANDLER HELPERS ***********************/
+/******************************************************************************/
-/**
- * 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,
- 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)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- " core id %s\n",
- GNUNET_i2s (identity));
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- " my id %s\n",
- GNUNET_i2s (&my_full_id));
- GNUNET_CORE_disconnect (core_handle);
- core_handle = GNUNET_CORE_connect (c, /* Main configuration */
- NULL, /* Closure passed to MESH functions */
- &core_init, /* Call core_init once connected */
- &core_connect, /* Handle connects */
- &core_disconnect, /* remove peers on disconnects */
- NULL, /* Don't notify about all incoming messages */
- GNUNET_NO, /* For header only in notification */
- NULL, /* Don't notify about all outbound messages */
- GNUNET_NO, /* For header-only out notification */
- core_handlers); /* Register these handlers */
- if (10 < i++)
- GNUNET_abort();
- }
- server_init ();
- return;
-}
+/******************************************************************************/
+/******************** MESH NETWORK HANDLERS **************************/
+/******************************************************************************/
/******************************************************************************/
/************************ MAIN FUNCTIONS ****************************/
/******************************************************************************/
-/**
- * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
- *
- * @param cls closure
- * @param key current key code
- * @param value value in the hash map
- * @return GNUNET_YES if we should continue to iterate,
- * GNUNET_NO if not.
- */
-static int
-shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
-{
- struct MeshTunnel2 *t = value;
-
- tunnel_destroy (t);
- return GNUNET_YES;
-}
-
/**
* Task run during shutdown.
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
- if (core_handle != NULL)
- {
- GNUNET_CORE_disconnect (core_handle);
- core_handle = NULL;
- }
- GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
- if (dht_handle != NULL)
- {
- GNUNET_DHT_disconnect (dht_handle);
- dht_handle = NULL;
- }
- if (nc != NULL)
- {
- GNUNET_SERVER_notification_context_destroy (nc);
- nc = NULL;
- }
- if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
- {
- GNUNET_SCHEDULER_cancel (announce_id_task);
- announce_id_task = GNUNET_SCHEDULER_NO_TASK;
- }
+ GML_shutdown ();
+ GMD_shutdown ();
+ GMP_shutdown ();
+ GMC_shutdown ();
+ GMT_shutdown ();
+
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
}
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;
- GNUNET_SERVER_suspend (server_handle);
-
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_filename (c, "PEER", "PRIVATE_KEY",
- &keyfile))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _
- ("%s service is lacking key configuration settings (%s). Exiting.\n"),
- "mesh", "peer/privatekey");
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
-
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_CONNECTION_TIME",
- &refresh_connection_time))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _
- ("%s service is lacking key configuration settings (%s). Exiting.\n"),
- "mesh", "refresh path time");
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
-
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
- &id_announce_time))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _
- ("%s service is lacking key configuration settings (%s). Exiting.\n"),
- "mesh", "id announce time");
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
-
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
- &connect_timeout))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _
- ("%s service is lacking key configuration settings (%s). Exiting.\n"),
- "mesh", "connect timeout");
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
-
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
- &max_msgs_queue))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _
- ("%s service is lacking key configuration settings (%s). Exiting.\n"),
- "mesh", "max msgs queue");
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_CONNECTIONS",
- &max_connections))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _
- ("%s service is lacking key configuration settings (%s). Exiting.\n"),
- "mesh", "max tunnels");
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
-
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
- &default_ttl))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _
- ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
- "mesh", "default ttl", 64);
- default_ttl = 64;
- }
-
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_PEERS",
- &max_peers))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
- "mesh", "max peers", 1000);
- max_peers = 1000;
- }
-
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DROP_PERCENT",
- &drop_percent))
- {
- drop_percent = 0;
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- "Mesh is running with drop mode enabled. "
- "This is NOT a good idea! "
- "Remove the DROP_PERCENT option from your configuration.\n");
- }
-
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
- &dht_replication_level))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _
- ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
- "mesh", "dht replication level", 3);
- dht_replication_level = 3;
- }
-
- tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
- peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
- ports = GNUNET_CONTAINER_multihashmap32_create (32);
-
- dht_handle = GNUNET_DHT_connect (c, 64);
- if (NULL == dht_handle)
- {
- GNUNET_break (0);
- }
stats = GNUNET_STATISTICS_create ("mesh", c);
/* 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);
- GNUNET_free (keyfile);
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO, "reading key\n");
+ pk = GNUNET_CRYPTO_eddsa_key_create_from_configuration (c);
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",
- GNUNET_i2s(&my_full_id));
+ GNUNET_i2s (&my_full_id));
+
+ GML_init (server); /* Local clients */
+ GMC_init (c); /* Connections */
+ GMP_init (c); /* Peers */
+ GMD_init (c, &my_full_id); /* DHT */
+ GMT_init (c, &my_full_id, my_private_key);
- core_handle = GNUNET_CORE_connect (c, /* Main configuration */
- NULL, /* Closure passed to MESH functions */
- &core_init, /* Call core_init once connected */
- &core_connect, /* Handle connects */
- &core_disconnect, /* remove peers on disconnects */
- NULL, /* Don't notify about all incoming messages */
- GNUNET_NO, /* For header only in notification */
- NULL, /* Don't notify about all outbound messages */
- GNUNET_NO, /* For header-only out notification */
- core_handlers); /* Register these handlers */
- if (NULL == core_handle)
- {
- GNUNET_break (0);
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
}
ret = (GNUNET_OK == r) ? 0 : 1;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");
- INTERVAL_SHOW;
-
return ret;
}
projects / oweals / gnunet.git / blobdiff