* - 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_util_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"
-
-#include "gnunet-service-mesh_local.h"
-#include "gnunet-service-mesh_channel.h"
-#include "gnunet-service-mesh_connection.h"
-
-#define MESH_BLOOM_SIZE 128
-#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
-
-#define MESH_DEBUG_DHT GNUNET_NO
-#define MESH_DEBUG_CONNECTION GNUNET_NO
-#define MESH_DEBUG_TIMING __LINUX__ && GNUNET_NO
-
-#if MESH_DEBUG_DHT
-#define DEBUG_DHT(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
-#else
-#define DEBUG_DHT(...)
-#endif
-
-#if MESH_DEBUG_CONNECTION
-#define DEBUG_CONN(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
-#else
-#define DEBUG_CONN(...)
-#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
-};
-
-
-
-/******************************************************************************/
-/************************ DATA STRUCTURES ****************************/
-/******************************************************************************/
-
-/** FWD declaration */
-struct MeshClient;
-struct MeshPeer;
-struct MeshTunnel2;
-struct MeshConnection;
-
-
-
-/**
- * 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;
-};
-
-
-
-
-/**
- * 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;
-
- /**
- * 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_EccPublicSignKey *my_eph;
-
- /**
- * Remote peer's public key.
- */
- struct GNUNET_CRYPTO_EccPublicSignKey *peers_eph;
-
- /**
- * Encryption ("our") key.
- */
- struct GNUNET_CRYPTO_SymmetricSessionKey e_key;
-
- /**
- * Decryption ("their") key.
- */
- struct GNUNET_CRYPTO_SymmetricSessionKey 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;
-};
-
-
-
-/******************************************************************************/
-/************************ 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 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 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 **************************/
-
-/**
- * Peers known, indexed by PeerIdentity (MeshPeer).
- */
-static struct GNUNET_CONTAINER_MultiPeerMap *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 the statistics service.
- */
-static struct GNUNET_STATISTICS_Handle *stats;
-
-/**
- * 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;
-
-/**
- * Task to periodically announce itself in the network.
- */
-GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
-
-
-/******************************************************************************/
-/*********************** 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);
-
-
-/**
- * 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);
-
-
-/**
- * Demultiplex by message type and call appropriate handler for a message
- * towards a channel of a local tunnel.
- *
- * @param t Tunnel this message came on.
- * @param msgh Message header.
- * @param fwd Is this message fwd?
- */
-static void
-handle_decrypted (struct MeshTunnel2 *t,
- const struct GNUNET_MessageHeader *msgh,
- int fwd);
-
-
-/**
- * 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_ACK:
- return "MESH_CONNECTION_ACK";
- 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;
- struct GNUNET_HashCode phash;
-
- 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_CRYPTO_hash (&my_full_id, sizeof (struct GNUNET_PeerIdentity), &phash);
- GNUNET_DHT_put (dht_handle, /* DHT handle */
- &phash, /* 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));
-}
-
-
-
-/**
- * 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;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_get_connection %s\n",
- peer2s (t->peer));
- best = NULL;
- lowest_q = UINT_MAX;
- for (c = t->connection_head; NULL != c; c = c->next)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " connection %s: %u\n",
- GNUNET_h2s (&c->id), c->state);
- if (MESH_CONNECTION_READY == c->state)
- {
- fc = fwd ? &c->fwd_fc : &c->bck_fc;
- if (NULL == fc)
- {
- GNUNET_break (0);
- continue;
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " q_n %u, \n", fc->queue_n);
- if (fc->queue_n < lowest_q)
- {
- best = c;
- lowest_q = fc->queue_n;
- }
- }
- }
- return best;
-}
-
-
-
-
-/**
- * Get the total buffer space for a tunnel.
- *
- * @param t Tunnel.
- * @param fwd Is this for FWD traffic?
- *
- * @return Buffer space offered by all connections in the tunnel.
- */
-static unsigned int
-tunnel_get_buffer (struct MeshTunnel2 *t, int fwd)
-{
- struct MeshConnection *c;
- struct MeshFlowControl *fc;
- unsigned int buffer;
-
- c = t->connection_head;
- buffer = 0;
-
- /* If terminal, return biggest channel buffer */
- if (NULL == c || GMC_is_terminal (c, fwd))
- {
- struct MeshChannel *ch;
- unsigned int ch_buf;
-
- if (NULL == t->channel_head)
- return 64;
-
- for (ch = t->channel_head; NULL != ch; ch = ch->next)
- {
- ch_buf = channel_get_buffer (ch, fwd);
- if (ch_buf > buffer)
- buffer = ch_buf;
- }
- return buffer;
- }
-
- /* If not terminal, return sum of connection buffers */
- while (NULL != c)
- {
- if (c->state != MESH_CONNECTION_READY)
- {
- c = c->next;
- continue;
- }
-
- fc = fwd ? &c->fwd_fc : &c->bck_fc;
- buffer += fc->queue_max - fc->queue_n;
- c = c->next;
- }
-
- 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 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",
- peer2s (t->peer));
- 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 = c->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);
- }
- msg->reserved = 0;
-
- send_prebuilt_message_connection (&msg->header, c, 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 (NULL != t &&
- (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);
- if (MESH_CONNECTION_READY != connection->state)
- connection_change_state (connection, MESH_CONNECTION_SENT);
-}
-
-
-/**
- * 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 = c->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 = c->id;
- msg->reserved = 0;
-
- /* 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_multipeermap_remove (peers, &id, peer))
- {
- GNUNET_break (0);
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- "removing peer %s, not in peermap\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_PeerIdentity *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_PeerIdentity *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_multipeermap_iterate (peers,
- &peer_get_oldest,
- &abs);
- GNUNET_CONTAINER_multipeermap_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_multipeermap_get (peers, peer_id);
- if (NULL == peer)
- {
- peer = GNUNET_new (struct MeshPeer);
- if (GNUNET_CONTAINER_multipeermap_size (peers) > max_peers)
- {
- peer_delete_oldest ();
- }
- GNUNET_CONTAINER_multipeermap_put (peers, peer_id, peer,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
- peer->id = GNUNET_PEER_intern (peer_id);
- }
- peer->last_contact = GNUNET_TIME_absolute_get();
-
- return peer;
-}
-
-
-/**
- * Retrieve the MeshPeer stucture associated with the peer, create one
- * and insert it in the appropriate structures if the peer is not known yet.
- *
- * @param peer Short identity of the peer.
- *
- * @return Existing or newly created peer info.
- */
-static struct MeshPeer *
-peer_get_short (const GNUNET_PEER_Id peer)
-{
- return peer_get (GNUNET_PEER_resolve2 (peer));
-}
-
-
-/**
- * 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;
-}
-
-
-
-/**
- * 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;
- int rerun_dhtget;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "peer_connect towards %s\n",
- peer2s (peer));
- t = peer->tunnel;
- c = NULL;
- rerun_dhtget = GNUNET_NO;
-
- 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);
- if (NULL == c)
- {
- /* This case can happen when the path includes a first hop that is
- * not yet known to be connected.
- *
- * This happens quite often during testing when running mesh
- * under valgrind: core connect notifications come very late and the
- * DHT result has already come and created a valid path.
- * In this case, the peer->connections hashmap will be NULL and
- * tunnel_use_path will not be able to create a connection from that
- * path.
- *
- * Re-running the DHT GET should give core time to callback.
- */
- GNUNET_break(0);
- rerun_dhtget = GNUNET_YES;
- }
- else
- {
- send_connection_create (c);
- return;
- }
- }
- }
-
- if (NULL != peer->dhtget && GNUNET_YES == rerun_dhtget)
- {
- GNUNET_DHT_get_stop (peer->dhtget);
- peer->dhtget = NULL;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " Stopping DHT GET for peer %s\n", peer2s (peer));
- }
-
- if (NULL == peer->dhtget)
- {
- const struct GNUNET_PeerIdentity *id;
- struct GNUNET_HashCode phash;
-
- id = GNUNET_PEER_resolve2 (peer->id);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " Starting DHT GET for peer %s\n", peer2s (peer));
- GNUNET_CRYPTO_hash (&id, sizeof (struct GNUNET_PeerIdentity), &phash);
- peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
- GNUNET_BLOCK_TYPE_MESH_PEER, /* type */
- &phash, /* key to search */
- dht_replication_level, /* replication level */
- GNUNET_DHT_RO_RECORD_ROUTE |
- GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
- NULL, /* xquery */
- 0, /* xquery bits */
- &dht_get_id_handler, peer);
- if (MESH_TUNNEL_NEW == t->state)
- tunnel_change_state (t, MESH_TUNNEL_SEARCHING);
- }
-}
-
-
-
-/**
- * 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)
-{
- if (NULL == path)
- return;
- path_invert (path);
- peer_add_path (peer_info, path, trusted);
-}
-
-/**
- * Build a PeerPath from the paths returned from the DHT, reversing the paths
- * to obtain a local peer -> destination path and interning the peer ids.
- *
- * @return Newly allocated and created path
- */
-static struct MeshPeerPath *
-path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
- unsigned int get_path_length,
- const struct GNUNET_PeerIdentity *put_path,
- unsigned int put_path_length)
-{
- struct MeshPeerPath *p;
- GNUNET_PEER_Id id;
- int i;
-
- p = path_new (1);
- p->peers[0] = myid;
- GNUNET_PEER_change_rc (myid, 1);
- i = get_path_length;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
- for (i--; i >= 0; i--)
- {
- id = GNUNET_PEER_intern (&get_path[i]);
- if (p->length > 0 && id == p->peers[p->length - 1])
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
- GNUNET_PEER_change_rc (id, -1);
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
- GNUNET_i2s (&get_path[i]));
- p->length++;
- p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
- p->peers[p->length - 1] = id;
- }
- }
- i = put_path_length;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
- for (i--; i >= 0; i--)
- {
- id = GNUNET_PEER_intern (&put_path[i]);
- if (id == myid)
- {
- /* PUT path went through us, so discard the path up until now and start
- * from here to get a much shorter (and loop-free) path.
- */
- path_destroy (p);
- p = path_new (0);
- }
- if (p->length > 0 && id == p->peers[p->length - 1])
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
- GNUNET_PEER_change_rc (id, -1);
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
- GNUNET_i2s (&put_path[i]));
- p->length++;
- p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
- p->peers[p->length - 1] = id;
- }
- }
-#if MESH_DEBUG
- if (get_path_length > 0)
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
- GNUNET_i2s (&get_path[0]));
- if (put_path_length > 0)
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
- GNUNET_i2s (&put_path[0]));
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
- p->length);
- for (i = 0; i < p->length; i++)
- {
- struct GNUNET_PeerIdentity peer_id;
-
- GNUNET_PEER_resolve (p->peers[i], &peer_id);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
- GNUNET_i2s (&peer_id));
- }
-#endif
- return p;
-}
-
-
-/**
- * Adds a path to the peer_infos of all the peers in the path
- *
- * @param p Path to process.
- * @param confirmed Whether we know if the path works or not.
- */
-static void
-path_add_to_peers (struct MeshPeerPath *p, int confirmed)
-{
- unsigned int i;
-
- /* TODO: invert and add */
- for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
- for (i++; i < p->length; i++)
- {
- struct 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);
- }
-}
-
-
-#if 0
-static void
-fc_debug (struct MeshFlowControl *fc)
-{
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " IN: %u/%u\n",
- fc->last_pid_recv, fc->last_ack_sent);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " OUT: %u/%u\n",
- fc->last_pid_sent, fc->last_ack_recv);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " QUEUE: %u/%u\n",
- fc->queue_n, fc->queue_max);
-}
-
-static void
-connection_debug (struct MeshConnection *c)
-{
- if (NULL == c)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "*** DEBUG NULL CONNECTION ***\n");
- return;
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Connection %s:%X\n",
- peer2s (c->t->peer), GNUNET_h2s (&c->id));
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " state: %u, pending msgs: %u\n",
- c->state, c->pending_messages);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD FC\n");
- fc_debug (&c->fwd_fc);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK FC\n");
- fc_debug (&c->bck_fc);
-}
-
-#endif
-
-
-/**
- * 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)
-{
- if (NULL == t)
- return;
- 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;
-}
-
-
-/**
- * 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 tunnel %s\n",
- peer2s (t->peer));
- 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);
- }
-}
-
-
-/**
- * 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);
-
- if (MESH_TUNNEL_READY == t->state)
- tunnel_send_queued_data (t, fwd);
-}
-
-
-
-
-
-static struct MeshConnection *
-tunnel_use_path (struct MeshTunnel2 *t, struct MeshPeerPath *p)
-{
- struct MeshConnection *c;
- struct GNUNET_HashCode cid;
- struct MeshPeer *peer;
- unsigned int own_pos;
-
- if (NULL == t || NULL == p)
- {
- GNUNET_break (0);
- return NULL;
- }
-
- GNUNET_CRYPTO_hash_create_random (GNUNET_CRYPTO_QUALITY_NONCE, &cid);
-
- c = connection_new (&cid);
- c->t = t;
- GNUNET_CONTAINER_DLL_insert (t->connection_head, t->connection_tail, c);
- 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);
- if (NULL == peer->connections)
- {
- connection_destroy (c);
- return NULL;
- }
- GNUNET_CONTAINER_multihashmap_put (peer->connections, &c->id, c,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
- peer = connection_get_prev_hop (c);
- if (NULL == peer->connections)
- {
- connection_destroy (c);
- return NULL;
- }
- GNUNET_CONTAINER_multihashmap_put (peer->connections, &c->id, c,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
- 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 ACK on the appropriate connection/channel, depending on
- * the direction and the position of the peer.
- *
- * @param c Which connection to send the hop-by-hop ACK.
- * @param ch Channel, if any.
- * @param fwd Is this a fwd ACK? (will go dest->root)
- */
-static void
-send_ack (struct MeshConnection *c, struct MeshChannel *ch, int fwd)
-{
- unsigned int buffer;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "send ack %s on %p %p\n",
- fwd ? "FWD" : "BCK", c, ch);
- if (NULL == c || GMC_is_terminal (c, fwd))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " getting from all connections\n");
- buffer = tunnel_get_buffer (NULL == c ? ch->t : c->t, fwd);
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " getting from one connection\n");
- buffer = connection_get_buffer (c, fwd);
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " buffer available: %u\n", buffer);
-
- if ( (NULL != ch && channel_is_origin (ch, fwd)) ||
- (NULL != c && connection_is_origin (c, fwd)) )
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending on channel...\n");
- if (0 < buffer)
- {
- GNUNET_assert (NULL != ch);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " really sending!\n");
- send_local_ack (ch, fwd);
- }
- }
- else if (NULL == c)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending on all connections\n");
- GNUNET_assert (NULL != ch);
- channel_send_connections_ack (ch, buffer, fwd);
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending on connection\n");
- connection_send_ack (c, buffer, fwd);
- }
-}
-
-
-
-
-/**
- * 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 %s ack for channel %s:%X\n",
- fwd ? "FWD" : "BCK", 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 (channel_is_terminal (ch, GNUNET_NO))
- {
- if (NULL != ch->root && GNUNET_NO == ch->root->shutting_down)
- {
- 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 (channel_is_terminal (ch, GNUNET_YES))
- {
- if (NULL != ch->dest && GNUNET_NO == ch->dest->shutting_down)
- {
- 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.
- */
-static struct MeshTunnel2 *
-tunnel_new (void)
-{
- struct MeshTunnel2 *t;
-
- t = GNUNET_new (struct MeshTunnel2);
- 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_SymmetricSessionKey),
-// salt, sizeof (salt),
-// &t->e_key, sizeof (struct GNUNET_CRYPTO_SymmetricSessionKey),
-// &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_SymmetricSessionKey),
-// salt, sizeof (salt),
-// &t->d_key, sizeof (struct GNUNET_CRYPTO_SymmetricSessionKey),
-// GNUNET_PEER_resolve2 (t->peer->id), sizeof (struct GNUNET_PeerIdentity),
-// &my_full_id, sizeof (struct GNUNET_PeerIdentity),
-// NULL);
-
- return t;
-}
-
-
-/**
- * Add a connection to a tunnel.
- *
- * @param t Tunnel.
- * @param c Connection.
- */
-static void
-tunnel_add_connection (struct MeshTunnel2 *t, struct MeshConnection *c)
-{
- struct MeshConnection *aux;
- c->t = t;
- for (aux = t->connection_head; aux != NULL; aux = aux->next)
- if (aux == c)
- return;
- GNUNET_CONTAINER_DLL_insert_tail (t->connection_head, t->connection_tail, 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);
- t->peer->tunnel = NULL;
-
- 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);
-}
-
-
-/******************************************************************************/
-/**************** MESH NETWORK HANDLER HELPERS ***********************/
-/******************************************************************************/
-
-
-
-
-
-
-/******************************************************************************/
-/******************** 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;
- */
-static void
-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;
- 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;
- }
- 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 %u unknown\n",
- ntohl (msg->chid));
- return;
- }
-
- /* Initialize FWD/BCK data */
- c = fwd ? ch->dest : ch->root;
- rel = fwd ? ch->dest_rel : ch->root_rel;
-
- if (NULL == c)
- {
- GNUNET_break (0);
- return;
- }
-
- 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 (rel->mid_recv, mid) &&
- GMC_is_pid_bigger (rel->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 == rel->mid_recv)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "as expected\n");
- rel->mid_recv++;
- channel_send_client_data (ch, msg, fwd);
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "save for later\n");
- channel_rel_add_buffered_data (msg, rel);
- }
- }
- else
- {
- /* Tunnel is unreliable: send to clients directly */
- /* FIXME: accept Out Of Order traffic */
- rel->mid_recv = mid + 1;
- 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, rel->mid_recv, rel->mid_recv + 64);
- }
-
- channel_send_data_ack (ch, fwd);
-}
-
-/**
- * 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)
- */
-static void
-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;
- }
- 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->root_rel;
- }
- else
- {
- rel = ch->dest_rel;
- }
- if (NULL == rel)
- {
- GNUNET_break (0);
- return;
- }
-
- 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);
- }
-}
-
-
-/**
- * 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 *cid;
- struct MeshPeerPath *path;
- struct MeshPeer *dest_peer;
- struct MeshPeer *orig_peer;
- struct MeshConnection *c;
- unsigned int own_pos;
- uint16_t size;
- uint16_t i;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "\n\n");
- 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 = &msg->cid;
- id = (struct GNUNET_PeerIdentity *) &msg[1];
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- " connection %s (%s).\n",
- GNUNET_h2s (cid), GNUNET_i2s (id));
-
- /* Create connection */
- c = connection_get (cid);
- if (NULL == c)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating connection\n");
- c = connection_new (cid);
- if (NULL == c)
- return GNUNET_OK;
- connection_reset_timeout (c, GNUNET_YES);
-
- /* 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;
- }
- else
- {
- path = NULL;
- }
- if (MESH_CONNECTION_NEW == c->state)
- connection_change_state (c, MESH_CONNECTION_SENT);
-
- /* Remember peers */
- dest_peer = peer_get (&id[size - 1]);
- orig_peer = peer_get (&id[0]);
-
- /* Is it a connection to us? */
- if (c->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);
-
- if (NULL == orig_peer->tunnel)
- {
- orig_peer->tunnel = tunnel_new ();
- orig_peer->tunnel->peer = orig_peer;
- }
- tunnel_add_connection (orig_peer->tunnel, c);
- if (MESH_TUNNEL_NEW == c->t->state)
- tunnel_change_state (c->t, MESH_TUNNEL_WAITING);
-
- send_connection_ack (c, GNUNET_NO);
- if (MESH_CONNECTION_SENT == c->state)
- connection_change_state (c, MESH_CONNECTION_ACK);
-
- /* 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 MeshConnection *c;
- struct MeshPeerPath *p;
- struct MeshPeer *pi;
- int fwd;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "\n\n");
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a connection ACK msg\n");
- msg = (struct GNUNET_MESH_ConnectionACK *) message;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on connection %s\n",
- GNUNET_h2s (&msg->cid));
- c = connection_get (&msg->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));
- pi = peer_get (peer);
- if (connection_get_next_hop (c) == pi)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " SYNACK\n");
- fwd = GNUNET_NO;
- if (MESH_CONNECTION_SENT == c->state)
- connection_change_state (c, MESH_CONNECTION_ACK);
- }
- else if (connection_get_prev_hop (c) == pi)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK\n");
- fwd = GNUNET_YES;
- connection_change_state (c, MESH_CONNECTION_READY);
- }
- else
- {
- GNUNET_break_op (0);
- return GNUNET_OK;
- }
- connection_reset_timeout (c, fwd);
-
- /* Add path to peers? */
- p = c->path;
- if (NULL != p)
- {
- path_add_to_peers (p, GNUNET_YES);
- }
- else
- {
- GNUNET_break (0);
- }
-
- /* Message for us as creator? */
- if (connection_is_origin (c, GNUNET_YES))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Connection (SYN)ACK for us!\n");
- connection_change_state (c, MESH_CONNECTION_READY);
- if (MESH_TUNNEL_READY != c->t->state)
- tunnel_change_state (c->t, MESH_TUNNEL_READY);
- send_connection_ack (c, GNUNET_YES);
- tunnel_send_queued_data (c->t, GNUNET_YES);
- 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;
- }
- return GNUNET_OK;
- }
-
- /* Message for us as destination? */
- if (GMC_is_terminal (c, GNUNET_YES))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Connection ACK for us!\n");
- if (MESH_TUNNEL_READY != c->t->state)
- tunnel_change_state (c->t, MESH_TUNNEL_READY);
- connection_change_state (c, MESH_CONNECTION_READY);
- tunnel_send_queued_data (c->t, GNUNET_NO);
- return GNUNET_OK;
- }
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not for us, retransmitting...\n");
- send_prebuilt_message_connection (message, c, NULL, fwd);
- 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->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\n",
- GNUNET_h2s (&msg->cid));
- c = connection_get (&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;
- */
-static void
-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;
- }
-
- /* Check if channel exists */
- chid = ntohl (msg->chid);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " chid %u\n", chid);
- ch = channel_get (t, chid);
- if (NULL != ch)
- {
- /* Probably a retransmission, safe to ignore */
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " already exists...\n");
- if (NULL != ch->dest)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " duplicate CC!!\n");
- channel_send_ack (ch, !fwd);
- return;
- }
- }
- else
- {
- /* Create channel */
- ch = channel_new (t, NULL, 0);
- ch->gid = chid;
- 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");
- /* TODO free ch */
- return;
- }
-
- channel_add_client (ch, c);
- if (GNUNET_YES == ch->reliable)
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Reliable\n");
-
- send_local_channel_create (ch);
- channel_send_ack (ch, fwd);
- send_local_ack (ch, !fwd);
-}
-
-
-/**
- * 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;
- */
-static void
-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;
- }
-
- /* 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;
- }
-
- channel_confirm (ch, !fwd);
-}
-
-
-/**
- * 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;
- */
-static void
-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;
- }
-
- /* Check if channel exists */
- chid = ntohl (msg->chid);
- ch = channel_get (t, chid);
- if (NULL == ch)
- {
- /* Probably a retransmission, safe to ignore */
- return;
- }
- if ( (fwd && NULL == ch->dest) || (!fwd && NULL == ch->root) )
- {
- /* Not for us (don't destroy twice a half-open loopback channel) */
- return;
- }
-
- send_local_channel_destroy (ch, fwd);
- channel_destroy (ch);
-}
-
-
-static void
-handle_decrypted (struct MeshTunnel2 *t,
- const struct GNUNET_MessageHeader *msgh,
- int fwd)
-{
- switch (ntohs (msgh->type))
- {
- case GNUNET_MESSAGE_TYPE_MESH_DATA:
- /* Don't send hop ACK, wait for client to ACK */
- handle_data (t, (struct GNUNET_MESH_Data *) msgh, fwd);
- break;
-
- case GNUNET_MESSAGE_TYPE_MESH_DATA_ACK:
- handle_data_ack (t, (struct GNUNET_MESH_DataACK *) msgh, fwd);
- break;
-
- case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE:
- handle_channel_create (t,
- (struct GNUNET_MESH_ChannelCreate *) msgh,
- fwd);
- break;
-
- case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_ACK:
- handle_channel_ack (t,
- (struct GNUNET_MESH_ChannelManage *) msgh,
- fwd);
- break;
-
- case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_DESTROY:
- 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));
- }
-}
-
-
-/**
- * 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_op (0);
- return GNUNET_OK;
- }
- type = ntohs (msg->header.type);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "\n\n");
- 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->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->bck_fc : &c->fwd_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 (GMC_is_terminal (c, fwd))
- {
- size_t dsize = size - sizeof (struct GNUNET_MESH_Encrypted);
- char cbuf[dsize];
- struct GNUNET_MessageHeader *msgh;
- unsigned int off;
-
- /* TODO signature verification */
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " message 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);
- off = 0;
- while (off < dsize)
- {
- msgh = (struct GNUNET_MessageHeader *) &cbuf[off];
- handle_decrypted (t, msgh, fwd);
- off += ntohs (msgh->size);
- }
- send_ack (c, NULL, fwd);
- return GNUNET_OK;
- }
-
- /* 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");
- send_ack (c, NULL, 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)
+ * 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 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;
- int fwd;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "\n\n");
- 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->cid);
-
- if (NULL == c)
- {
- GNUNET_STATISTICS_update (stats, "# ack on unknown connection", 1,
- GNUNET_NO);
- 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;
- fwd = GNUNET_YES;
- }
- else if (connection_get_prev_hop (c)->id == id)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
- fc = &c->bck_fc;
- fwd = GNUNET_NO;
- }
- else
- {
- GNUNET_break_op (0);
- return GNUNET_OK;
- }
-
- ack = ntohl (msg->ack);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u (was %u)\n",
- ack, fc->last_ack_recv);
- if (GMC_is_pid_bigger (ack, fc->last_ack_recv))
- fc->last_ack_recv = ack;
-
- /* Cancel polling if the ACK is big enough. */
- if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task &&
- GMC_is_pid_bigger (fc->last_ack_recv, fc->last_pid_sent))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Cancel poll\n");
- GNUNET_SCHEDULER_cancel (fc->poll_task);
- fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
- fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
- }
-
- connection_unlock_queue (c, fwd);
-
- return GNUNET_OK;
-}
+#include "platform.h"
+#include "gnunet_util_lib.h"
+#include "mesh_enc.h"
+#include "gnunet_statistics_service.h"
-/**
- * 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;
- int fwd;
+#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"
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "\n\n");
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a POLL packet from %s!\n",
- GNUNET_i2s (peer));
- msg = (struct GNUNET_MESH_Poll *) message;
+/******************************************************************************/
+/************************ DATA STRUCTURES ****************************/
+/******************************************************************************/
- c = connection_get (&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?
- * Note: a poll should never be needed in a loopback case,
- * since there is no possiblility of packet loss there, so
- * this way of discerining FWD/BCK should not be a problem.
- */
- 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;
- }
+/******************************************************************************/
+/************************ DEBUG FUNCTIONS ****************************/
+/******************************************************************************/
- 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;
- fwd = fc == &c->fwd_fc;
- send_ack (c, NULL, fwd);
- return GNUNET_OK;
-}
+/******************************************************************************/
+/*********************** GLOBAL VARIABLES ****************************/
+/******************************************************************************/
+/****************************** Global variables ******************************/
/**
- * 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.
+ * Handle to the statistics service.
*/
-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->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 (GMC_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;
-}
-
-
+struct GNUNET_STATISTICS_Handle *stats;
/**
- * Functions to handle messages from core
+ * Local peer own ID (memory efficient handle).
*/
-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}
-};
-
+GNUNET_PEER_Id myid;
/**
- * 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
+ * Local peer own ID (full value).
*/
-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;
- unsigned int connection_count;
-
- 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 */
- connection_count = GMC_count (peer->tunnel->connection_head);
-
- /* If we already have 3 (or more (?!)) connections, it's enough */
- if (3 <= connection_count)
- return;
-
- if (peer->tunnel->state == MESH_TUNNEL_SEARCHING)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... connect!\n");
- peer_connect (peer);
- }
- return;
-}
-
+struct GNUNET_PeerIdentity my_full_id;
+/*************************** Static global variables **************************/
/**
- * Method called whenever a given peer connects.
- *
- * @param cls closure
- * @param peer peer identity this notification is about
+ * Own private key.
*/
-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);
+static struct GNUNET_CRYPTO_EddsaPrivateKey *my_private_key;
- pi->connections = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_YES);
- return;
-}
+/******************************************************************************/
+/*********************** DECLARATIONS **************************/
+/******************************************************************************/
-/**
- * Method called whenever a peer disconnects.
- *
- * @param cls closure
- * @param peer peer identity this notification is about
- */
-static void
-core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
-{
- struct MeshPeer *pi;
- DEBUG_CONN ("Peer disconnected\n");
- pi = GNUNET_CONTAINER_multipeermap_get (peers, peer);
- if (NULL == pi)
- {
- GNUNET_break (0);
- return;
- }
+/******************************************************************************/
+/****************** GENERAL HELPER FUNCTIONS ************************/
+/******************************************************************************/
- GNUNET_CONTAINER_multihashmap_iterate (pi->connections,
- GMC_notify_broken,
- pi);
- GNUNET_CONTAINER_multihashmap_destroy (pi->connections);
- pi->connections = NULL;
- if (NULL != pi->core_transmit)
- {
- GNUNET_CORE_notify_transmit_ready_cancel (pi->core_transmit);
- pi->core_transmit = NULL;
- }
- if (myid == pi->id)
- {
- DEBUG_CONN (" (self)\n");
- }
- GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
- return;
-}
+/******************************************************************************/
+/**************** MESH NETWORK HANDLER HELPERS ***********************/
+/******************************************************************************/
-/**
- * To be called on core init/fail.
- *
- * @param cls Closure (config)
- * @param identity the public identity of this peer
- */
-static void
-core_init (void *cls,
- const struct GNUNET_PeerIdentity *identity)
-{
- const struct GNUNET_CONFIGURATION_Handle *c = cls;
- static int i = 0;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
- if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- " 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_PeerIdentity *key,
- void *value)
-{
- struct MeshPeer *p = value;
- struct MeshTunnel2 *t = p->tunnel;
-
- if (NULL != t)
- 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_multipeermap_iterate (peers, &shutdown_tunnel, NULL);
- if (dht_handle != NULL)
- {
- GNUNET_DHT_disconnect (dht_handle);
- dht_handle = NULL;
- }
GML_shutdown ();
- if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
- {
- GNUNET_SCHEDULER_cancel (announce_id_task);
- announce_id_task = GNUNET_SCHEDULER_NO_TASK;
- }
+ 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)
{
- struct GNUNET_CRYPTO_EccPrivateKey *pk;
-
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
- &id_announce_time))
- {
- GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_ERROR,
- "MESH", "ID_ANNOUNCE_TIME", "MISSING");
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
-
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
- &connect_timeout))
- {
- GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_ERROR,
- "MESH", "CONNECT_TIMEOUT", "MISSING");
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
-
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
- &default_ttl))
- {
- GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_WARNING,
- "MESH", "DEFAULT_TTL", "USING DEFAULT");
- default_ttl = 64;
- }
-
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_PEERS",
- &max_peers))
- {
- GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_WARNING,
- "MESH", "MAX_PEERS", "USING DEFAULT");
- 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,
- "\n***************************************\n"
- "Mesh is running with drop mode enabled.\n"
- "This is NOT a good idea!\n"
- "Remove the DROP_PERCENT option from your configuration.\n"
- "***************************************\n");
- }
-
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
- &dht_replication_level))
- {
- GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_WARNING,
- "MESH", "DHT_REPLICATION_LEVEL", "USING DEFAULT");
- dht_replication_level = 3;
- }
-
- peers = GNUNET_CONTAINER_multipeermap_create (32, GNUNET_NO);
-
- 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);
GNUNET_log (GNUNET_ERROR_TYPE_INFO, "reading key\n");
- pk = GNUNET_CRYPTO_ecc_key_create_from_configuration (c);
- GNUNET_assert (NULL != pk);
- my_private_key = pk;
- GNUNET_CRYPTO_ecc_key_get_public_for_signature (my_private_key,
- &my_full_id.public_key);
+ my_private_key = GNUNET_CRYPTO_eddsa_key_create_from_configuration (c);
+ GNUNET_assert (NULL != my_private_key);
+ 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);
- GMC_init (c);
+ GML_init (server); /* Local clients */
+ GMC_init (c); /* Connections */
+ GMP_init (c); /* Peers */
+ GMD_init (c); /* DHT */
+ GMT_init (c, my_private_key); /* Tunnels */
- 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");
}
int ret;
int r;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
+ fprintf (stderr, "main()\n");
r = GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
NULL);
+ GNUNET_free (my_private_key);
ret = (GNUNET_OK == r) ? 0 : 1;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");
-
- INTERVAL_SHOW;
+ fprintf (stderr, "main() END\n");
return ret;
}
projects / oweals / gnunet.git / blobdiff