#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"
-#define MESH_BLOOM_SIZE 128
-
-
-#define MESH_DEBUG_TIMING __LINUX__ && GNUNET_NO
-
-
-#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 MeshTunnel2;
-
-
-/**
- * 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 **************************/
-/**
- * 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;
-
-/**
- * Percentage of messages that will be dropped (for test purposes only).
- */
-static unsigned long long drop_percent;
/*************************** Static global variables **************************/
/*********************** DECLARATIONS **************************/
/******************************************************************************/
-/**
- * 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;
- }
-}
-
-
-
/******************************************************************************/
/****************** GENERAL HELPER FUNCTIONS ************************/
-/**
- * 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);
-}
-
-
-
-/**
- * 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.
-/**
- * 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 HANDLERS **************************/
/******************************************************************************/
-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));
- }
-}
-/**
- * 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 path
- */
-static void
-search_handler (void *cls, struct MeshPeerPath *path)
-{
-// struct MeshConnection *c;
- unsigned int connection_count;
-
- path_add_to_peers (path, GNUNET_NO);
-
- /* 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;
-}
-
/******************************************************************************/
/************************ MAIN FUNCTIONS ****************************/
/******************************************************************************/
-
-
/**
* Task run during shutdown.
*
GMD_shutdown ();
GMP_shutdown ();
GMC_shutdown ();
+ GMT_shutdown ();
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
- 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", "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");
- }
-
-
stats = GNUNET_STATISTICS_create ("mesh", c);
/* Scheduled the task to clean up when shutdown is called */
myid = GNUNET_PEER_intern (&my_full_id);
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Mesh for peer [%s] starting\n",
- GNUNET_i2s(&my_full_id));
+ GNUNET_i2s (&my_full_id));
GML_init (server); /* Local clients */
GMC_init (c); /* Connections */
GMP_init (c); /* Peers */
GMD_init (c, &my_full_id); /* DHT */
+ GMT_init (c, &my_full_id, &my_private_key);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
}
ret = (GNUNET_OK == r) ? 0 : 1;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");
- INTERVAL_SHOW;
-
return ret;
}
}
+
+/**
+ * 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);
+ GMCH_send_prebuilt_message (&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);
+ GMCH_send_prebuilt_message (&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);
+ GMCH_send_prebuilt_message (&msg.header, ch, GNUNET_YES);
+ }
+}
+
+
/**
* Iterator for deleting each channel whose client endpoint disconnected.
*
#endif
#endif
+#include "platform.h"
#include "gnunet_util_lib.h"
/**
*/
static struct GNUNET_CORE_Handle *core_handle;
+#if 0 // avoid compiler warning for unused static function
+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
/**
* Get string description for tunnel state.
}
-/**
- * Get first sendable message.
- *
- * @param peer The destination peer.
- *
- * @return Best current known path towards the peer, if any.
- */
-static struct MeshPeerQueue *
-peer_get_first_message (const struct MeshPeer *peer)
-{
- struct MeshPeerQueue *q;
-
- for (q = peer->queue_head; NULL != q; q = q->next)
- {
- if (queue_is_sendable (q))
- return q;
- }
-
- return NULL;
-}
-
-
-static int
-queue_is_sendable (struct MeshPeerQueue *q)
-{
- struct MeshFlowControl *fc;
-
- /* Is PID-independent? */
- switch (q->type)
- {
- case GNUNET_MESSAGE_TYPE_MESH_ACK:
- case GNUNET_MESSAGE_TYPE_MESH_POLL:
- return GNUNET_YES;
- }
-
- /* Is PID allowed? */
- fc = q->fwd ? &q->c->fwd_fc : &q->c->bck_fc;
- if (GMC_is_pid_bigger (fc->last_ack_recv, fc->last_pid_sent))
- return GNUNET_YES;
-
- return GNUNET_NO;
-}
-
-
-
-/**
- * Free a transmission that was already queued with all resources
- * associated to the request.
- *
- * @param queue Queue handler to cancel.
- * @param clear_cls Is it necessary to free associated cls?
- */
-static void
-queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
-{
- struct MeshPeer *peer;
- struct MeshFlowControl *fc;
- int fwd;
-
- fwd = queue->fwd;
- peer = queue->peer;
- GNUNET_assert (NULL != queue->c);
- fc = fwd ? &queue->c->fwd_fc : &queue->c->bck_fc;
-
- if (GNUNET_YES == clear_cls)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " queue destroy type %s\n",
- GNUNET_MESH_DEBUG_M2S (queue->type));
- switch (queue->type)
- {
- case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_DESTROY:
- case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "destroying a DESTROY message\n");
- GNUNET_break (GNUNET_YES == queue->c->destroy);
- /* fall through */
- case GNUNET_MESSAGE_TYPE_MESH_FWD:
- case GNUNET_MESSAGE_TYPE_MESH_BCK:
- case GNUNET_MESSAGE_TYPE_MESH_ACK:
- case GNUNET_MESSAGE_TYPE_MESH_POLL:
- case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK:
- case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE:
- case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_BROKEN:
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " prebuilt message\n");;
- GNUNET_free_non_null (queue->cls);
- break;
-
- default:
- GNUNET_break (0);
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " type %s unknown!\n",
- GNUNET_MESH_DEBUG_M2S (queue->type));
- }
-
- }
- GNUNET_CONTAINER_DLL_remove (peer->queue_head, peer->queue_tail, queue);
-
- if (queue->type != GNUNET_MESSAGE_TYPE_MESH_ACK &&
- queue->type != GNUNET_MESSAGE_TYPE_MESH_POLL)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Q_N- %p %u\n", fc, fc->queue_n);
- fc->queue_n--;
- peer->queue_n--;
- }
- if (NULL != queue->c)
- {
- queue->c->pending_messages--;
- if (NULL != queue->c->t)
- {
- queue->c->t->pending_messages--;
- }
- }
-
- GNUNET_free (queue);
-}
-
-
-
-static size_t
-queue_send (void *cls, size_t size, void *buf)
-{
- struct MeshPeer *peer = cls;
- struct MeshFlowControl *fc;
- struct MeshConnection *c;
- struct GNUNET_MessageHeader *msg;
- struct MeshPeerQueue *queue;
- struct MeshTunnel2 *t;
- struct MeshChannel *ch;
- const struct GNUNET_PeerIdentity *dst_id;
- size_t data_size;
- uint32_t pid;
- uint16_t type;
- int fwd;
-
- peer->core_transmit = NULL;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Queue send (max %u)\n", size);
-
- if (NULL == buf || 0 == size)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Buffer size 0.\n");
- return 0;
- }
-
- /* Initialize */
- queue = peer_get_first_message (peer);
- if (NULL == queue)
- {
- GNUNET_break (0); /* Core tmt_rdy should've been canceled */
- return 0;
- }
- c = queue->c;
- fwd = queue->fwd;
- fc = fwd ? &c->fwd_fc : &c->bck_fc;
-
- dst_id = GNUNET_PEER_resolve2 (peer->id);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* towards %s\n", GNUNET_i2s (dst_id));
- /* Check if buffer size is enough for the message */
- if (queue->size > size)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not enough room, reissue\n");
- peer->core_transmit =
- GNUNET_CORE_notify_transmit_ready (core_handle,
- GNUNET_NO,
- 0,
- GNUNET_TIME_UNIT_FOREVER_REL,
- dst_id,
- queue->size,
- &queue_send,
- peer);
- return 0;
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* size %u ok\n", queue->size);
-
- t = (NULL != c) ? c->t : NULL;
- type = 0;
-
- /* Fill buf */
- switch (queue->type)
- {
- case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
- case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_DESTROY:
- case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_BROKEN:
- case GNUNET_MESSAGE_TYPE_MESH_FWD:
- case GNUNET_MESSAGE_TYPE_MESH_BCK:
- case GNUNET_MESSAGE_TYPE_MESH_ACK:
- case GNUNET_MESSAGE_TYPE_MESH_POLL:
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "* raw: %s\n",
- GNUNET_MESH_DEBUG_M2S (queue->type));
- data_size = send_core_data_raw (queue->cls, size, buf);
- msg = (struct GNUNET_MessageHeader *) buf;
- type = ntohs (msg->type);
- break;
- case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE:
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path create\n");
- if (GMC_is_origin (c, GNUNET_YES))
- data_size = send_core_connection_create (queue->c, size, buf);
- else
- data_size = send_core_data_raw (queue->cls, size, buf);
- break;
- case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK:
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path ack\n");
- if (GMC_is_origin (c, GNUNET_NO) ||
- GMC_is_origin (c, GNUNET_YES))
- data_size = send_core_connection_ack (queue->c, size, buf);
- else
- data_size = send_core_data_raw (queue->cls, size, buf);
- break;
- case GNUNET_MESSAGE_TYPE_MESH_DATA:
- case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE:
- case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_DESTROY:
- /* This should be encapsulted */
- GNUNET_break (0);
- data_size = 0;
- break;
- default:
- GNUNET_break (0);
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "* type unknown: %u\n",
- queue->type);
- data_size = 0;
- }
-
- if (0 < drop_percent &&
- GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK, 101) < drop_percent)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- "Dropping message of type %s\n",
- GNUNET_MESH_DEBUG_M2S (queue->type));
- data_size = 0;
- }
-
- /* Free queue, but cls was freed by send_core_* */
- ch = queue->ch;
- queue_destroy (queue, GNUNET_NO);
-
- /* Send ACK if needed, after accounting for sent ID in fc->queue_n */
- switch (type)
- {
- case GNUNET_MESSAGE_TYPE_MESH_FWD:
- case GNUNET_MESSAGE_TYPE_MESH_BCK:
- pid = ntohl ( ((struct GNUNET_MESH_Encrypted *) buf)->pid );
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* accounting pid %u\n", pid);
- fc->last_pid_sent = pid;
- send_ack (c, ch, fwd);
- break;
- default:
- break;
- }
-
- /* If more data in queue, send next */
- queue = peer_get_first_message (peer);
- if (NULL != queue)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* more data!\n");
- if (NULL == peer->core_transmit) {
- peer->core_transmit =
- GNUNET_CORE_notify_transmit_ready(core_handle,
- 0,
- 0,
- GNUNET_TIME_UNIT_FOREVER_REL,
- dst_id,
- queue->size,
- &queue_send,
- peer);
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "* tmt rdy called somewhere else\n");
- }
- if (GNUNET_SCHEDULER_NO_TASK == fc->poll_task)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* starting poll timeout\n");
- fc->poll_task =
- GNUNET_SCHEDULER_add_delayed (fc->poll_time, &connection_poll, fc);
- }
- }
- else
- {
- if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task)
- {
- GNUNET_SCHEDULER_cancel (fc->poll_task);
- fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
- }
- }
- if (NULL != c)
- {
- c->pending_messages--;
- if (GNUNET_YES == c->destroy && 0 == c->pending_messages)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* destroying connection!\n");
- GMC_destroy (c);
- }
- }
-
- if (NULL != t)
- {
- t->pending_messages--;
- if (GNUNET_YES == t->destroy && 0 == t->pending_messages)
- {
-// GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* destroying tunnel!\n");
- tunnel_destroy (t);
- }
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Return %d\n", data_size);
- return data_size;
-}
-
-
-
-static void
-queue_add (void *cls, uint16_t type, size_t size,
- struct MeshConnection *c,
- struct MeshChannel *ch,
- int fwd)
-{
- struct MeshPeerQueue *queue;
- struct MeshFlowControl *fc;
- struct MeshPeer *peer;
- int priority;
- int call_core;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "queue add %s %s (%u) on c %p, ch %p\n",
- fwd ? "FWD" : "BCK", GNUNET_MESH_DEBUG_M2S (type), size, c, ch);
- GNUNET_assert (NULL != c);
-
- fc = fwd ? &c->fwd_fc : &c->bck_fc;
- peer = fwd ? connection_get_next_hop (c) : connection_get_prev_hop (c);
-
- if (NULL == fc)
- {
- GNUNET_break (0);
- return;
- }
-
- if (NULL == peer->connections)
- {
- /* We are not connected to this peer, ignore request. */
- GNUNET_break_op (0);
- return;
- }
-
- priority = 0;
-
- if (GNUNET_MESSAGE_TYPE_MESH_POLL == type ||
- GNUNET_MESSAGE_TYPE_MESH_ACK == type)
- {
- priority = 100;
- }
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "priority %d\n", priority);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "fc %p\n", fc);
- if (fc->queue_n >= fc->queue_max && 0 == priority)
- {
- GNUNET_STATISTICS_update (stats, "# messages dropped (buffer full)",
- 1, GNUNET_NO);
- GNUNET_break (0);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "queue full: %u/%u\n",
- fc->queue_n, fc->queue_max);
- return; /* Drop this message */
- }
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "last pid %u\n", fc->last_pid_sent);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", fc->last_ack_recv);
- if (GMC_is_pid_bigger (fc->last_pid_sent + 1, fc->last_ack_recv))
- {
- call_core = GNUNET_NO;
- if (GNUNET_SCHEDULER_NO_TASK == fc->poll_task &&
- GNUNET_MESSAGE_TYPE_MESH_POLL != type)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "no buffer space (%u > %u): starting poll\n",
- fc->last_pid_sent + 1, fc->last_ack_recv);
- fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
- &connection_poll,
- fc);
- }
- }
- else
- call_core = GNUNET_YES;
- queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
- queue->cls = cls;
- queue->type = type;
- queue->size = size;
- queue->peer = peer;
- queue->c = c;
- queue->ch = ch;
- queue->fwd = fwd;
- if (100 <= priority)
- {
- struct MeshPeerQueue *copy;
- struct MeshPeerQueue *next;
-
- for (copy = peer->queue_head; NULL != copy; copy = next)
- {
- next = copy->next;
- if (copy->type == type && copy->c == c && copy->fwd == fwd)
- {
- /* Example: also a FWD ACK for connection XYZ */
- queue_destroy (copy, GNUNET_YES);
- }
- }
- GNUNET_CONTAINER_DLL_insert (peer->queue_head, peer->queue_tail, queue);
- }
- else
- {
- GNUNET_CONTAINER_DLL_insert_tail (peer->queue_head, peer->queue_tail, queue);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Q_N+ %p %u\n", fc, fc->queue_n);
- fc->queue_n++;
- peer->queue_n++;
- }
-
- if (NULL == peer->core_transmit && GNUNET_YES == call_core)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "calling core tmt rdy towards %s for %u bytes\n",
- peer2s (peer), size);
- peer->core_transmit =
- GNUNET_CORE_notify_transmit_ready (core_handle,
- 0,
- 0,
- GNUNET_TIME_UNIT_FOREVER_REL,
- GNUNET_PEER_resolve2 (peer->id),
- size,
- &queue_send,
- peer);
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "core tmt rdy towards %s already called\n",
- peer2s (peer));
-
- }
- c->pending_messages++;
- if (NULL != c->t)
- c->t->pending_messages++;
-}
-
-
-
-
/**
* Sends an already built message on a connection, properly registering
* all used resources.
fwd);
}
-
-
-
-struct MeshConnection *
-GMC_new (const struct GNUNET_HashCode *cid)
-{
- struct MeshConnection *c;
-
- c = GNUNET_new (struct MeshConnection);
- c->id = *cid;
- GNUNET_CONTAINER_multihashmap_put (connections, &c->id, c,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
- fc_init (&c->fwd_fc);
- fc_init (&c->bck_fc);
- c->fwd_fc.c = c;
- c->bck_fc.c = c;
-
- return c;
-}
-
-
-static void
-GMC_destroy (struct MeshConnection *c)
-{
- struct MeshPeer *peer;
-
- if (NULL == c)
- return;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying connection %s[%X]\n",
- peer2s (c->t->peer),
- c->id);
-
- /* Cancel all traffic */
- connection_cancel_queues (c, GNUNET_YES);
- connection_cancel_queues (c, GNUNET_NO);
-
- /* Cancel maintainance task (keepalive/timeout) */
- if (GNUNET_SCHEDULER_NO_TASK != c->fwd_maintenance_task)
- GNUNET_SCHEDULER_cancel (c->fwd_maintenance_task);
- if (GNUNET_SCHEDULER_NO_TASK != c->bck_maintenance_task)
- GNUNET_SCHEDULER_cancel (c->bck_maintenance_task);
-
- /* Deregister from neighbors */
- peer = connection_get_next_hop (c);
- if (NULL != peer && NULL != peer->connections)
- GNUNET_CONTAINER_multihashmap_remove (peer->connections, &c->id, c);
- peer = connection_get_prev_hop (c);
- if (NULL != peer && NULL != peer->connections)
- GNUNET_CONTAINER_multihashmap_remove (peer->connections, &c->id, c);
-
- /* Delete */
- GNUNET_STATISTICS_update (stats, "# connections", -1, GNUNET_NO);
- GNUNET_CONTAINER_DLL_remove (c->t->connection_head, c->t->connection_tail, c);
- GNUNET_free (c);
-}
-
-
-
/**
* Send an ACK informing the predecessor about the available buffer space.
*
}
+/**
+ * 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);
+}
+
+
+/**
+ * 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);
+}
+
+
static void
connection_change_state (struct MeshConnection* c,
enum MeshConnectionState state)
+struct MeshConnection *
+GMC_new (const struct GNUNET_HashCode *cid)
+{
+ struct MeshConnection *c;
+
+ c = GNUNET_new (struct MeshConnection);
+ c->id = *cid;
+ GNUNET_CONTAINER_multihashmap_put (connections, &c->id, c,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
+ fc_init (&c->fwd_fc);
+ fc_init (&c->bck_fc);
+ c->fwd_fc.c = c;
+ c->bck_fc.c = c;
+
+ return c;
+}
+
+
+static void
+GMC_destroy (struct MeshConnection *c)
+{
+ struct MeshPeer *peer;
+
+ if (NULL == c)
+ return;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying connection %s[%X]\n",
+ peer2s (c->t->peer),
+ c->id);
+
+ /* Cancel all traffic */
+ connection_cancel_queues (c, GNUNET_YES);
+ connection_cancel_queues (c, GNUNET_NO);
+
+ /* Cancel maintainance task (keepalive/timeout) */
+ if (GNUNET_SCHEDULER_NO_TASK != c->fwd_maintenance_task)
+ GNUNET_SCHEDULER_cancel (c->fwd_maintenance_task);
+ if (GNUNET_SCHEDULER_NO_TASK != c->bck_maintenance_task)
+ GNUNET_SCHEDULER_cancel (c->bck_maintenance_task);
+
+ /* Deregister from neighbors */
+ peer = connection_get_next_hop (c);
+ if (NULL != peer && NULL != peer->connections)
+ GNUNET_CONTAINER_multihashmap_remove (peer->connections, &c->id, c);
+ peer = connection_get_prev_hop (c);
+ if (NULL != peer && NULL != peer->connections)
+ GNUNET_CONTAINER_multihashmap_remove (peer->connections, &c->id, c);
+
+ /* Delete */
+ GNUNET_STATISTICS_update (stats, "# connections", -1, GNUNET_NO);
+ GNUNET_CONTAINER_DLL_remove (c->t->connection_head, c->t->connection_tail, c);
+ GNUNET_free (c);
+}
+
+
/**
* Iterator to notify all connections of a broken link. Mark connections
* to destroy after all traffic has been sent.
{
return GMC_is_origin (c, !fwd);
}
+
+
+/**
+ * Count connections in a DLL.
+ */
+unsigned int
+GMC_count (const struct MeshConnection *head)
+{
+ unsigned int count;
+ struct MeshConnection *iter;
+
+ for (count = 0, iter = head; NULL != iter; iter = iter->next, count++);
+
+ return count;
+}
\ No newline at end of file
#include "platform.h"
#include "gnunet_util_lib.h"
+struct GMD_search_handle;
/******************************************************************************/
/******************************** API ***********************************/
void
GMD_shutdown (void);
+struct GMD_search_handle *
+GMD_search (const struct GNUNET_PeerIdentity *peer_id,
+ GMD_search_callback callback, void *cls);
+
+void
+GMD_search_stop (struct GMD_search_handle *h);
+
#if 0 /* keep Emacsens' auto-indent happy */
{
#endif
#include "gnunet-service-mesh_peer.h"
#include "gnunet-service-mesh_dht.h"
+#include "gnunet-service-mesh_connection.h"
#include "mesh_path.h"
/******************************************************************************/
/**
* Handle to stop the DHT search for paths to this peer
*/
- struct GNUNET_DHT_GetHandle *dhtget;
+ struct GMD_search_handle *search_h;
/**
* Tunnel to this peer, if any.
*/
static unsigned long long max_peers;
+/**
+ * Percentage of messages that will be dropped (for test purposes only).
+ */
+static unsigned long long drop_percent;
+
+/******************************************************************************/
+/***************************** CORE CALLBACKS *********************************/
+/******************************************************************************/
+
+
+/**
+ * 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);
+}
+
/******************************************************************************/
/******************************** STATIC ***********************************/
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
"removing peer %s, not in peermap\n", GNUNET_i2s (&id));
}
- if (NULL != peer->dhtget)
+ if (NULL != peer->search_h)
{
- GNUNET_DHT_get_stop (peer->dhtget);
+ GMD_search_stop (peer->search_h);
}
p = peer->path_head;
while (NULL != 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);
+ }
+}
+
+
+/**
+ * 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 path
+ */
+static void
+search_handler (void *cls, struct MeshPeerPath *path)
+{
+ struct MeshPeer *peer = cls;
+ unsigned int connection_count;
+
+ path_add_to_peers (path, GNUNET_NO);
+
+ /* 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");
+ GMP_connect (peer);
+ }
+ return;
+}
+
+
+/**
+ * Core callback to write a queued packet to core buffer
+ *
+ * @param cls Closure (peer info).
+ * @param size Number of bytes available in buf.
+ * @param buf Where the to write the message.
+ *
+ * @return number of bytes written to buf
+ */
+static size_t
+queue_send (void *cls, size_t size, void *buf)
+{
+ struct MeshPeer *peer = cls;
+ struct MeshFlowControl *fc;
+ struct MeshConnection *c;
+ struct GNUNET_MessageHeader *msg;
+ struct MeshPeerQueue *queue;
+ struct MeshTunnel2 *t;
+ struct MeshChannel *ch;
+ const struct GNUNET_PeerIdentity *dst_id;
+ size_t data_size;
+ uint32_t pid;
+ uint16_t type;
+ int fwd;
+
+ peer->core_transmit = NULL;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Queue send (max %u)\n", size);
+
+ if (NULL == buf || 0 == size)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Buffer size 0.\n");
+ return 0;
+ }
+
+ /* Initialize */
+ queue = peer_get_first_message (peer);
+ if (NULL == queue)
+ {
+ GNUNET_break (0); /* Core tmt_rdy should've been canceled */
+ return 0;
+ }
+ c = queue->c;
+ fwd = queue->fwd;
+ fc = fwd ? &c->fwd_fc : &c->bck_fc;
+
+ dst_id = GNUNET_PEER_resolve2 (peer->id);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* towards %s\n", GNUNET_i2s (dst_id));
+ /* Check if buffer size is enough for the message */
+ if (queue->size > size)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not enough room, reissue\n");
+ peer->core_transmit =
+ GNUNET_CORE_notify_transmit_ready (core_handle,
+ GNUNET_NO,
+ 0,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ dst_id,
+ queue->size,
+ &queue_send,
+ peer);
+ return 0;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* size %u ok\n", queue->size);
+
+ t = (NULL != c) ? c->t : NULL;
+ type = 0;
+
+ /* Fill buf */
+ switch (queue->type)
+ {
+ case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
+ case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_DESTROY:
+ case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_BROKEN:
+ case GNUNET_MESSAGE_TYPE_MESH_FWD:
+ case GNUNET_MESSAGE_TYPE_MESH_BCK:
+ case GNUNET_MESSAGE_TYPE_MESH_ACK:
+ case GNUNET_MESSAGE_TYPE_MESH_POLL:
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "* raw: %s\n",
+ GNUNET_MESH_DEBUG_M2S (queue->type));
+ data_size = send_core_data_raw (queue->cls, size, buf);
+ msg = (struct GNUNET_MessageHeader *) buf;
+ type = ntohs (msg->type);
+ break;
+ case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE:
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path create\n");
+ if (GMC_is_origin (c, GNUNET_YES))
+ data_size = send_core_connection_create (queue->c, size, buf);
+ else
+ data_size = send_core_data_raw (queue->cls, size, buf);
+ break;
+ case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK:
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path ack\n");
+ if (GMC_is_origin (c, GNUNET_NO) ||
+ GMC_is_origin (c, GNUNET_YES))
+ data_size = send_core_connection_ack (queue->c, size, buf);
+ else
+ data_size = send_core_data_raw (queue->cls, size, buf);
+ break;
+ case GNUNET_MESSAGE_TYPE_MESH_DATA:
+ case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE:
+ case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_DESTROY:
+ /* This should be encapsulted */
+ GNUNET_break (0);
+ data_size = 0;
+ break;
+ default:
+ GNUNET_break (0);
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "* type unknown: %u\n",
+ queue->type);
+ data_size = 0;
+ }
+
+ if (0 < drop_percent &&
+ GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK, 101) < drop_percent)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "Dropping message of type %s\n",
+ GNUNET_MESH_DEBUG_M2S (queue->type));
+ data_size = 0;
+ }
+
+ /* Free queue, but cls was freed by send_core_* */
+ ch = queue->ch;
+ queue_destroy (queue, GNUNET_NO);
+
+ /* Send ACK if needed, after accounting for sent ID in fc->queue_n */
+ switch (type)
+ {
+ case GNUNET_MESSAGE_TYPE_MESH_FWD:
+ case GNUNET_MESSAGE_TYPE_MESH_BCK:
+ pid = ntohl ( ((struct GNUNET_MESH_Encrypted *) buf)->pid );
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* accounting pid %u\n", pid);
+ fc->last_pid_sent = pid;
+ send_ack (c, ch, fwd);
+ break;
+ default:
+ break;
+ }
+
+ /* If more data in queue, send next */
+ queue = peer_get_first_message (peer);
+ if (NULL != queue)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* more data!\n");
+ if (NULL == peer->core_transmit) {
+ peer->core_transmit =
+ GNUNET_CORE_notify_transmit_ready(core_handle,
+ 0,
+ 0,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ dst_id,
+ queue->size,
+ &queue_send,
+ peer);
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "* tmt rdy called somewhere else\n");
+ }
+ if (GNUNET_SCHEDULER_NO_TASK == fc->poll_task)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* starting poll timeout\n");
+ fc->poll_task =
+ GNUNET_SCHEDULER_add_delayed (fc->poll_time, &connection_poll, fc);
+ }
+ }
+ else
+ {
+ if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task)
+ {
+ GNUNET_SCHEDULER_cancel (fc->poll_task);
+ fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ }
+ if (NULL != c)
+ {
+ c->pending_messages--;
+ if (GNUNET_YES == c->destroy && 0 == c->pending_messages)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* destroying connection!\n");
+ GMC_destroy (c);
+ }
+ }
+
+ if (NULL != t)
+ {
+ t->pending_messages--;
+ if (GNUNET_YES == t->destroy && 0 == t->pending_messages)
+ {
+// GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* destroying tunnel!\n");
+ tunnel_destroy (t);
+ }
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Return %d\n", data_size);
+ return data_size;
+}
+
+
+
+/**
+ * Get first sendable message.
+ *
+ * @param peer The destination peer.
+ *
+ * @return Best current known path towards the peer, if any.
+ */
+static struct MeshPeerQueue *
+peer_get_first_message (const struct MeshPeer *peer)
+{
+ struct MeshPeerQueue *q;
+
+ for (q = peer->queue_head; NULL != q; q = q->next)
+ {
+ if (queue_is_sendable (q))
+ return q;
+ }
+
+ return NULL;
+}
+
+
+static int
+queue_is_sendable (struct MeshPeerQueue *q)
+{
+ struct MeshFlowControl *fc;
+
+ /* Is PID-independent? */
+ switch (q->type)
+ {
+ case GNUNET_MESSAGE_TYPE_MESH_ACK:
+ case GNUNET_MESSAGE_TYPE_MESH_POLL:
+ return GNUNET_YES;
+ }
+
+ /* Is PID allowed? */
+ fc = q->fwd ? &q->c->fwd_fc : &q->c->bck_fc;
+ if (GMC_is_pid_bigger (fc->last_ack_recv, fc->last_pid_sent))
+ return GNUNET_YES;
+
+ return GNUNET_NO;
+}
+
+
/******************************************************************************/
/******************************** API ***********************************/
/******************************************************************************/
+
+/**
+ * Free a transmission that was already queued with all resources
+ * associated to the request.
+ *
+ * @param queue Queue handler to cancel.
+ * @param clear_cls Is it necessary to free associated cls?
+ */
+void
+GMP_queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
+{
+ struct MeshPeer *peer;
+ struct MeshFlowControl *fc;
+ int fwd;
+
+ fwd = queue->fwd;
+ peer = queue->peer;
+ GNUNET_assert (NULL != queue->c);
+ fc = fwd ? &queue->c->fwd_fc : &queue->c->bck_fc;
+
+ if (GNUNET_YES == clear_cls)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " queue destroy type %s\n",
+ GNUNET_MESH_DEBUG_M2S (queue->type));
+ switch (queue->type)
+ {
+ case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_DESTROY:
+ case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO, "destroying a DESTROY message\n");
+ GNUNET_break (GNUNET_YES == queue->c->destroy);
+ /* fall through */
+ case GNUNET_MESSAGE_TYPE_MESH_FWD:
+ case GNUNET_MESSAGE_TYPE_MESH_BCK:
+ case GNUNET_MESSAGE_TYPE_MESH_ACK:
+ case GNUNET_MESSAGE_TYPE_MESH_POLL:
+ case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK:
+ case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE:
+ case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_BROKEN:
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " prebuilt message\n");;
+ GNUNET_free_non_null (queue->cls);
+ break;
+
+ default:
+ GNUNET_break (0);
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " type %s unknown!\n",
+ GNUNET_MESH_DEBUG_M2S (queue->type));
+ }
+
+ }
+ GNUNET_CONTAINER_DLL_remove (peer->queue_head, peer->queue_tail, queue);
+
+ if (queue->type != GNUNET_MESSAGE_TYPE_MESH_ACK &&
+ queue->type != GNUNET_MESSAGE_TYPE_MESH_POLL)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Q_N- %p %u\n", fc, fc->queue_n);
+ fc->queue_n--;
+ peer->queue_n--;
+ }
+ if (NULL != queue->c)
+ {
+ queue->c->pending_messages--;
+ if (NULL != queue->c->t)
+ {
+ queue->c->t->pending_messages--;
+ }
+ }
+
+ GNUNET_free (queue);
+}
+
+
+/**
+ * @brief Queue and pass message to core when possible.
+ *
+ * @param cls Closure (@c type dependant). It will be used by queue_send to
+ * build the message to be sent if not already prebuilt.
+ * @param type Type of the message, 0 for a raw message.
+ * @param size Size of the message.
+ * @param c Connection this message belongs to (cannot be NULL).
+ * @param ch Channel this message belongs to, if applicable (otherwise NULL).
+ * @param fwd Is this a message going root->dest? (FWD ACK are NOT FWD!)
+ */
+void
+GMP_queue_add (void *cls, uint16_t type, size_t size,
+ struct MeshConnection *c,
+ struct MeshChannel *ch,
+ int fwd)
+{
+ struct MeshPeerQueue *queue;
+ struct MeshFlowControl *fc;
+ struct MeshPeer *peer;
+ int priority;
+ int call_core;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "queue add %s %s (%u) on c %p, ch %p\n",
+ fwd ? "FWD" : "BCK", GNUNET_MESH_DEBUG_M2S (type), size, c, ch);
+ GNUNET_assert (NULL != c);
+
+ fc = fwd ? &c->fwd_fc : &c->bck_fc;
+ peer = fwd ? connection_get_next_hop (c) : connection_get_prev_hop (c);
+
+ if (NULL == fc)
+ {
+ GNUNET_break (0);
+ return;
+ }
+
+ if (NULL == peer->connections)
+ {
+ /* We are not connected to this peer, ignore request. */
+ GNUNET_break_op (0);
+ return;
+ }
+
+ priority = 0;
+
+ if (GNUNET_MESSAGE_TYPE_MESH_POLL == type ||
+ GNUNET_MESSAGE_TYPE_MESH_ACK == type)
+ {
+ priority = 100;
+ }
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "priority %d\n", priority);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "fc %p\n", fc);
+ if (fc->queue_n >= fc->queue_max && 0 == priority)
+ {
+ GNUNET_STATISTICS_update (stats, "# messages dropped (buffer full)",
+ 1, GNUNET_NO);
+ GNUNET_break (0);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "queue full: %u/%u\n",
+ fc->queue_n, fc->queue_max);
+ return; /* Drop this message */
+ }
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "last pid %u\n", fc->last_pid_sent);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", fc->last_ack_recv);
+ if (GMC_is_pid_bigger (fc->last_pid_sent + 1, fc->last_ack_recv))
+ {
+ call_core = GNUNET_NO;
+ if (GNUNET_SCHEDULER_NO_TASK == fc->poll_task &&
+ GNUNET_MESSAGE_TYPE_MESH_POLL != type)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "no buffer space (%u > %u): starting poll\n",
+ fc->last_pid_sent + 1, fc->last_ack_recv);
+ fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
+ &connection_poll,
+ fc);
+ }
+ }
+ else
+ call_core = GNUNET_YES;
+ queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
+ queue->cls = cls;
+ queue->type = type;
+ queue->size = size;
+ queue->peer = peer;
+ queue->c = c;
+ queue->ch = ch;
+ queue->fwd = fwd;
+ if (100 <= priority)
+ {
+ struct MeshPeerQueue *copy;
+ struct MeshPeerQueue *next;
+
+ for (copy = peer->queue_head; NULL != copy; copy = next)
+ {
+ next = copy->next;
+ if (copy->type == type && copy->c == c && copy->fwd == fwd)
+ {
+ /* Example: also a FWD ACK for connection XYZ */
+ queue_destroy (copy, GNUNET_YES);
+ }
+ }
+ GNUNET_CONTAINER_DLL_insert (peer->queue_head, peer->queue_tail, queue);
+ }
+ else
+ {
+ GNUNET_CONTAINER_DLL_insert_tail (peer->queue_head, peer->queue_tail, queue);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Q_N+ %p %u\n", fc, fc->queue_n);
+ fc->queue_n++;
+ peer->queue_n++;
+ }
+
+ if (NULL == peer->core_transmit && GNUNET_YES == call_core)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "calling core tmt rdy towards %s for %u bytes\n",
+ peer2s (peer), size);
+ peer->core_transmit =
+ GNUNET_CORE_notify_transmit_ready (core_handle,
+ 0,
+ 0,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ GNUNET_PEER_resolve2 (peer->id),
+ size,
+ &queue_send,
+ peer);
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "core tmt rdy towards %s already called\n",
+ peer2s (peer));
+
+ }
+ c->pending_messages++;
+ if (NULL != c->t)
+ c->t->pending_messages++;
+}
+
+
+
/**
* Initialize the peer subsystem.
*
"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");
+ }
}
/**
struct MeshTunnel2 *t;
struct MeshPeerPath *p;
struct MeshConnection *c;
- int rerun_dhtget;
+ int rerun_search;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"peer_connect towards %s\n",
peer2s (peer));
t = peer->tunnel;
c = NULL;
- rerun_dhtget = GNUNET_NO;
+ rerun_search = GNUNET_NO;
if (NULL != peer->path_head)
{
* Re-running the DHT GET should give core time to callback.
*/
GNUNET_break(0);
- rerun_dhtget = GNUNET_YES;
+ rerun_search = GNUNET_YES;
}
else
{
}
}
- if (NULL != peer->dhtget && GNUNET_YES == rerun_dhtget)
+ if (NULL != peer->search_h && GNUNET_YES == rerun_search)
{
- GNUNET_DHT_get_stop (peer->dhtget);
- peer->dhtget = NULL;
+ GMD_search_stop (peer->search_h);
+ peer->search_h = NULL;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
" Stopping DHT GET for peer %s\n", peer2s (peer));
}
- if (NULL == peer->dhtget)
+ if (NULL == peer->search_h)
{
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);
+ peer->search_h = GMD_search (id, &search_handler, peer);
if (MESH_TUNNEL_NEW == t->state)
tunnel_change_state (t, MESH_TUNNEL_SEARCHING);
}
void
GMP_shutdown (void);
+/**
+ * @brief Queue and pass message to core when possible.
+ *
+ * @param cls Closure (@c type dependant). It will be used by queue_send to
+ * build the message to be sent if not already prebuilt.
+ * @param type Type of the message, 0 for a raw message.
+ * @param size Size of the message.
+ * @param c Connection this message belongs to (cannot be NULL).
+ * @param ch Channel this message belongs to, if applicable (otherwise NULL).
+ * @param fwd Is this a message going root->dest? (FWD ACK are NOT FWD!)
+ */
+void
+GMP_queue_add (void *cls, uint16_t type, size_t size,
+ struct MeshConnection *c,
+ struct MeshChannel *ch,
+ int fwd);
+
+/**
+ * Free a transmission that was already queued with all resources
+ * associated to the request.
+ *
+ * @param queue Queue handler to cancel.
+ * @param clear_cls Is it necessary to free associated cls?
+ */
+void
+GMP_queue_destroy (struct MeshPeerQueue *queue, int clear_cls);
+
#if 0 /* keep Emacsens' auto-indent happy */
{
--- /dev/null
+/*
+ This file is part of GNUnet.
+ (C) 2013 Christian Grothoff (and other contributing authors)
+
+ GNUnet is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3, or (at your
+ option) any later version.
+
+ GNUnet is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+*/
+
+#include "platform.h"
+#include "gnunet_util_lib.h"
+
+#include "gnunet-service-mesh_tunnel.h"
+#include "gnunet-service-mesh_connection.h"
+#include "gnunet-service-mesh_channel.h"
+#include "mesh_path.h"
+
+
+/**
+ * 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
+};
+
+
+
+/******************************************************************************/
+/******************************** STRUCTS **********************************/
+/******************************************************************************/
+
+/**
+ * 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;
+};
+
+
+/**
+ * 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; */
+};
+
+/******************************************************************************/
+/******************************* GLOBALS ***********************************/
+/******************************************************************************/
+
+/**
+ * Default TTL for payload packets.
+ */
+static unsigned long long default_ttl;
+
+/**
+ * Local peer own ID (memory efficient handle).
+ */
+static GNUNET_PEER_Id my_short_id;
+
+/**
+ * Local peer own ID (full value).
+ */
+const static struct GNUNET_PeerIdentity *my_full_id;
+
+/**
+ * Own private key.
+ */
+const static struct GNUNET_CRYPTO_EccPrivateKey *my_private_key;
+
+
+/******************************************************************************/
+/******************************** STATIC ***********************************/
+/******************************************************************************/
+
+
+/**
+ * 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;
+ }
+}
+
+
+/**
+ * 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 = GMCH_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;
+}
+
+
+/**
+ * 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);
+ GMCH_send_prebuilt_message ((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);
+}
+
+
+
+/******************************************************************************/
+/******************************** API ***********************************/
+/******************************************************************************/
+
+/**
+ * Initialize the tunnel subsystem.
+ *
+ * @param c Configuration handle.
+ * @param id Peer identity.
+ * @param key ECC private key, to derive all other keys and do crypto.
+ */
+void
+GMT_init (const struct GNUNET_CONFIGURATION_Handle *c,
+ const struct GNUNET_PeerIdentity *id,
+ const struct GNUNET_CRYPTO_EccPrivateKey *key)
+{
+ 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;
+ }
+ my_full_id = id;
+ my_private_key = key;
+ my_short_id = GNUNET_PEER_intern (my_full_id);
+}
+
+
+/**
+ * Shut down the tunnel subsystem.
+ */
+void
+GMT_shutdown (void)
+{
+ GNUNET_PEER_change_rc (my_short_id, -1);
+}
+
+
+/**
+ * Create a tunnel.
+ */
+struct MeshTunnel2 *
+GMT_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;
+}
+
+
+
+/**
+ * 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;
+}
+
+
+/**
+ * Add a connection to a tunnel.
+ *
+ * @param t Tunnel.
+ * @param c Connection.
+ */
+void
+GMT_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);
+}
+
+
+
+
+/**
+ * Tunnel is empty: destroy it.
+ *
+ * Notifies all connections about the destruction.
+ *
+ * @param t Tunnel to destroy.
+ */
+void
+GMT_destroy_empty (struct MeshTunnel2 *t)
+{
+ struct MeshConnection *c;
+
+ for (c = t->connection_head; NULL != c; c = c->next)
+ {
+ if (GNUNET_NO == c->destroy)
+ GMC_send_destroy (c);
+ }
+
+ if (0 == t->pending_messages)
+ GMT_destroy (t);
+ else
+ t->destroy = GNUNET_YES;
+}
+
+
+/**
+ * Destroy tunnel if empty (no more channels).
+ *
+ * @param t Tunnel to destroy if empty.
+ */
+void
+GMT_destroy_if_empty (struct MeshTunnel2 *t)
+{
+ if (1 <= GMCH_count (t->channel_head))
+ return;
+
+ GMT_destroy_empty (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.
+ */
+void
+GMT_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;
+ GMC_destroy (c);
+ }
+
+ GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
+ t->peer->tunnel = NULL;
+
+ GNUNET_free (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?
+ */
+void
+GMT_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));
+ }
+}
+
+
+/**
+ * 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
+GMT_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;
+}
+
+/**
+ * @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.
+ */
+struct MeshConnection *
+GMT_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 = GMC_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;
+}
+
+
+/**
+ * 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?
+ */
+void
+GMT_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?
+ */
+void
+GMT_decrypt (struct MeshTunnel2 *t,
+ void *dst, const void *src,
+ size_t size, uint64_t iv, int fwd)
+{
+ memcpy (dst, src, size);
+}
+
+
+/**
+ * Count established (ready) connections of a tunnel.
+ *
+ * @param t Tunnel on which to send the message.
+ *
+ * @return Number of connections.
+ */
+unsigned int
+GMT_count_connections (struct MeshTunnel2 *t)
+{
+ return GMC_count (t->connection_head);
+}
+
+
+/**
+ * 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?
+ */
+void
+GMT_send_prebuilt_message (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);
+}
--- /dev/null
+/*
+ This file is part of GNUnet.
+ (C) 2013 Christian Grothoff (and other contributing authors)
+
+ GNUnet is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3, or (at your
+ option) any later version.
+
+ GNUnet is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file mesh/gnunet-service-mesh_tunnel.h
+ * @brief mesh service; dealing with tunnels and crypto
+ * @author Bartlomiej Polot
+ *
+ * All functions in this file should use the prefix GMT (Gnunet Mesh Tunnel)
+ */
+
+#ifndef GNUNET_SERVICE_MESH_TUNNEL_H
+#define GNUNET_SERVICE_MESH_TUNNEL_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#if 0 /* keep Emacsens' auto-indent happy */
+}
+#endif
+#endif
+
+#include "platform.h"
+#include "gnunet_util_lib.h"
+
+/**
+ * Struct containing all information regarding a given peer
+ */
+struct MeshTunnel2;
+
+
+/******************************************************************************/
+/******************************** API ***********************************/
+/******************************************************************************/
+
+/**
+ * Initialize tunnel subsystem.
+ *
+ * @param c Configuration handle.
+ * @param id Peer identity.
+ * @param key ECC private key, to derive all other keys and do crypto.
+ */
+void
+GMT_init (const struct GNUNET_CONFIGURATION_Handle *c,
+ const struct GNUNET_PeerIdentity *id,
+ const GNUNET_CRYPTO_EccPrivateKey *key);
+
+/**
+ * Shut down the tunnel subsystem.
+ */
+void
+GMT_shutdown (void);
+
+
+#if 0 /* keep Emacsens' auto-indent happy */
+{
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+/* ifndef GNUNET_MESH_SERVICE_TUNNEL_H */
+#endif
+/* end of gnunet-mesh-service_tunnel.h */
\ No newline at end of file
projects / oweals / gnunet.git / commitdiff