X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=src%2Fdv%2Fgnunet-service-dv.c;h=844e44b6ffb4573962a6cdb5b9920bb3655c669b;hb=19377520016cc644070d207af34ae3e76618fdc8;hp=ebf8e82fef3eae8238e4da09ed70eb7cbd29034d;hpb=5b6955a12b801a06f428acf8ba2cd651cd294912;p=oweals%2Fgnunet.git diff --git a/src/dv/gnunet-service-dv.c b/src/dv/gnunet-service-dv.c index ebf8e82fe..844e44b6f 100644 --- a/src/dv/gnunet-service-dv.c +++ b/src/dv/gnunet-service-dv.c @@ -4,7 +4,7 @@ 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 2, or (at your + 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 @@ -37,42 +37,35 @@ #include "gnunet_core_service.h" #include "gnunet_signal_lib.h" #include "gnunet_util_lib.h" +#include "gnunet_hello_lib.h" +#include "gnunet_peerinfo_service.h" +#include "gnunet_crypto_lib.h" +#include "gnunet_statistics_service.h" #include "dv.h" /** - * DV Service Context stuff goes here... + * For testing mostly, remember only the + * shortest path to a distant neighbor. */ +#define AT_MOST_ONE GNUNET_NO -/** - * Handle to the core service api. - */ -static struct GNUNET_CORE_Handle *coreAPI; - -/** - * The identity of our peer. - */ -static struct GNUNET_PeerIdentity my_identity; - -/** - * The configuration for this service. - */ -static const struct GNUNET_CONFIGURATION_Handle *cfg; +#define USE_PEER_ID GNUNET_YES /** - * The scheduler for this service. + * How many outstanding messages (unknown sender) will we allow per peer? */ -static struct GNUNET_SCHEDULER_Handle *sched; +#define MAX_OUTSTANDING_MESSAGES 5 /** * How often do we check about sending out more peer information (if * we are connected to no peers previously). */ -#define GNUNET_DV_DEFAULT_SEND_INTERVAL GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS, 500)) +#define GNUNET_DV_DEFAULT_SEND_INTERVAL GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS, 500000) /** * How long do we wait at most between sending out information? */ -#define GNUNET_DV_MAX_SEND_INTERVAL GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 5)) +#define GNUNET_DV_MAX_SEND_INTERVAL GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS, 500000) /** * How long can we have not heard from a peer and @@ -102,57 +95,90 @@ static struct GNUNET_SCHEDULER_Handle *sched; #define DV_PRIORITY 0 /** - * The client, should be the DV plugin connected to us. Hopefully - * this client will never change, although if the plugin dies - * and returns for some reason it may happen. + * The cost to a direct neighbor. We used to use 0, but 1 makes more sense. */ -static struct GNUNET_SERVER_Client * client_handle; +#define DIRECT_NEIGHBOR_COST 1 /** - * Task to run when we shut down, cleaning up all our trash + * The default number of direct connections to store in DV (max) */ -GNUNET_SCHEDULER_TaskIdentifier cleanup_task; +#define DEFAULT_DIRECT_CONNECTIONS 50 /** - * Task to run to gossip about peers. Will reschedule itself forever until shutdown! + * The default size of direct + extended peers in DV (max) */ -GNUNET_SCHEDULER_TaskIdentifier gossip_task; +#define DEFAULT_DV_SIZE 100 /** - * Struct where neighbor information is stored. + * The default fisheye depth, from how many hops away will + * we keep peers? */ -struct DistantNeighbor *referees; - -static struct GNUNET_TIME_Relative client_transmit_timeout; - -static struct GNUNET_TIME_Relative default_dv_delay; - -static size_t default_dv_priority = 0; - +#define DEFAULT_FISHEYE_DEPTH 4 /** - * Pending message struct, also a test to see if these can - * safely ONLY be freed by callback. + * Linked list of messages to send to clients. */ struct PendingMessage { /** - * Copy of message to be sent + * Pointer to next item in the list + */ + struct PendingMessage *next; + + /** + * Pointer to previous item in the list + */ + struct PendingMessage *prev; + + /** + * The PeerIdentity to send to + */ + struct GNUNET_PeerIdentity recipient; + + /** + * The result of message sending. */ - struct GNUNET_MessageHeader *msg; + struct GNUNET_DV_SendResultMessage *send_result; /** - * Size of message to be sent + * Message importance level. */ - size_t msg_size; + unsigned int importance; /** - * Transmit handle, for cancellation if necessary. + * Size of message. */ - struct GNUNET_CORE_TransmitHandle *transmit_handle; + unsigned int msg_size; + + /** + * How long to wait before sending message. + */ + struct GNUNET_TIME_Relative timeout; + + /** + * Actual message to be sent; // avoid allocation + */ + const struct GNUNET_MessageHeader *msg; // msg = (cast) &pm[1]; // memcpy (&pm[1], data, len); }; +struct FastGossipNeighborList +{ + /** + * Next element of DLL + */ + struct FastGossipNeighborList *next; + + /** + * Prev element of DLL + */ + struct FastGossipNeighborList *prev; + + /** + * The neighbor to gossip about + */ + struct DistantNeighbor *about; +}; /** * Context created whenever a direct peer connects to us, @@ -166,14 +192,23 @@ struct NeighborSendContext struct DirectNeighbor *toNeighbor; /** - * The timeout for this task. + * The task associated with this context. */ - struct GNUNET_TIME_Relative timeout; + GNUNET_SCHEDULER_TaskIdentifier task; /** - * The task associated with this context. + * Head of DLL of peers to gossip about + * as fast as possible to this peer, for initial + * set up. */ - GNUNET_SCHEDULER_TaskIdentifier task; + struct FastGossipNeighborList *fast_gossip_list_head; + + /** + * Tail of DLL of peers to gossip about + * as fast as possible to this peer, for initial + * set up. + */ + struct FastGossipNeighborList *fast_gossip_list_tail; }; @@ -202,6 +237,44 @@ struct NeighborUpdateInfo * The time we heard about this peer */ struct GNUNET_TIME_Absolute now; + + /** + * Peer id this peer uses to refer to neighbor. + */ + unsigned int referrer_peer_id; + +}; + +/** + * Struct to store a single message received with + * an unknown sender. + */ +struct UnknownSenderMessage +{ + /** + * Message sender (immediate) + */ + struct GNUNET_PeerIdentity sender; + + /** + * The actual message received + */ + struct GNUNET_MessageHeader *message; + + /** + * Latency of connection + */ + struct GNUNET_TIME_Relative latency; + + /** + * Distance to destination + */ + uint32_t distance; + + /** + * Unknown sender id + */ + uint32_t sender_id; }; /** @@ -216,6 +289,11 @@ struct DirectNeighbor */ struct GNUNET_PeerIdentity identity; + /** + * PublicKey of neighbor. + */ + struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pkey; + /** * Head of DLL of nodes that this direct neighbor referred to us. */ @@ -236,6 +314,13 @@ struct DirectNeighbor * from DV? */ int hidden; + + /** + * Save messages immediately from this direct neighbor from a + * distan peer we don't know on the chance that it will be + * gossiped about and we can deliver the message. + */ + struct UnknownSenderMessage pending_messages[MAX_OUTSTANDING_MESSAGES]; }; @@ -276,11 +361,21 @@ struct DistantNeighbor */ struct GNUNET_PeerIdentity identity; + /** + * PublicKey of neighbor. + */ + struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pkey; + /** * Last time we received routing information from this peer */ struct GNUNET_TIME_Absolute last_activity; + /** + * Last time we sent routing information about this peer + */ + struct GNUNET_TIME_Absolute last_gossip; + /** * Cost to neighbor, used for actual distance vector computations */ @@ -302,59 +397,264 @@ struct DistantNeighbor * from DV? */ int hidden; + }; +struct PeerIteratorContext +{ + /** + * The actual context, to be freed later. + */ + struct GNUNET_PEERINFO_IteratorContext *ic; + + /** + * The neighbor about which we are concerned. + */ + struct DirectNeighbor *neighbor; + + /** + * The distant neighbor entry for this direct neighbor. + */ + struct DistantNeighbor *distant; + +}; /** - * Global construct + * Context used for creating hello messages when + * gossips are received. */ -struct GNUNET_DV_Context +struct HelloContext { /** - * Map of PeerIdentifiers to 'struct GNUNET_dv_neighbor*'s for all - * directly connected peers. + * Identity of distant neighbor. + */ + struct GNUNET_PeerIdentity distant_peer; + + /** + * Identity of direct neighbor, via which we send this message. + */ + const struct GNUNET_PeerIdentity *direct_peer; + + /** + * How many addresses do we need to add (always starts at 1, then set to 0) */ - struct GNUNET_CONTAINER_MultiHashMap *direct_neighbors; + int addresses_to_add; + +}; +struct DV_SendContext +{ /** - * Map of PeerIdentifiers to 'struct GNUNET_dv_neighbor*'s for - * peers connected via DV (extended neighborhood). Does ALSO - * include any peers that are in 'direct_neighbors'; for those - * peers, the cost will be zero and the referrer all zeros. + * The distant peer (should always match) */ - struct GNUNET_CONTAINER_MultiHashMap *extended_neighbors; + struct GNUNET_PeerIdentity *distant_peer; /** - * We use the min heap (min refers to cost) to prefer - * gossipping about peers with small costs. + * The direct peer, we need to verify the referrer of. */ - struct GNUNET_CONTAINER_Heap *neighbor_min_heap; + struct GNUNET_PeerIdentity *direct_peer; /** - * We use the max heap (max refers to cost) for general - * iterations over all peers and to remove the most costly - * connection if we have too many. + * The message to be sent */ - struct GNUNET_CONTAINER_Heap *neighbor_max_heap; + struct GNUNET_MessageHeader *message; - unsigned long long fisheye_depth; + /** + * The pre-built send result message. Simply needs to be queued + * and freed once send has been called! + */ + struct GNUNET_DV_SendResultMessage *send_result; - unsigned long long max_table_size; + /** + * The size of the message being sent, may be larger + * than message->header.size because it's multiple + * messages packed into one! + */ + size_t message_size; - unsigned int neighbor_id_loc; + /** + * How important is this message? + */ + unsigned int importance; - int closing; + /** + * Timeout for this message + */ + struct GNUNET_TIME_Relative timeout; + /** + * Unique ID for DV message + */ + unsigned int uid; }; -static struct GNUNET_DV_Context ctx; - struct FindDestinationContext { unsigned int tid; struct DistantNeighbor *dest; }; +struct FindIDContext +{ + unsigned int tid; + struct GNUNET_PeerIdentity *dest; + const struct GNUNET_PeerIdentity *via; +}; + +struct DisconnectContext +{ + /** + * Distant neighbor to get pid from. + */ + struct DistantNeighbor *distant; + + /** + * Direct neighbor that disconnected. + */ + struct DirectNeighbor *direct; +}; + +struct TokenizedMessageContext +{ + /** + * Immediate sender of this message + */ + const struct GNUNET_PeerIdentity *peer; + + /** + * Distant sender of the message + */ + struct DistantNeighbor *distant; + + /** + * Uid for this set of messages + */ + uint32_t uid; +}; + +/** + * Context for finding the least cost peer to send to. + * Transport selection can only go so far. + */ +struct FindLeastCostContext +{ + struct DistantNeighbor *target; + unsigned int least_cost; +}; + +/** + * Handle to the core service api. + */ +static struct GNUNET_CORE_Handle *coreAPI; + +/** + * Stream tokenizer to handle messages coming in from core. + */ +static struct GNUNET_SERVER_MessageStreamTokenizer *coreMST; + +/** + * The identity of our peer. + */ +static struct GNUNET_PeerIdentity my_identity; + +/** + * The configuration for this service. + */ +static const struct GNUNET_CONFIGURATION_Handle *cfg; + + +/** + * The client, the DV plugin connected to us. Hopefully + * this client will never change, although if the plugin dies + * and returns for some reason it may happen. + */ +static struct GNUNET_SERVER_Client * client_handle; + +/** + * Task to run when we shut down, cleaning up all our trash + */ +static GNUNET_SCHEDULER_TaskIdentifier cleanup_task; + +static size_t default_dv_priority = 0; + +static char *my_short_id; + +/** + * Transmit handle to the plugin. + */ +static struct GNUNET_CONNECTION_TransmitHandle * plugin_transmit_handle; + +/** + * Head of DLL for client messages + */ +static struct PendingMessage *plugin_pending_head; + +/** + * Tail of DLL for client messages + */ +static struct PendingMessage *plugin_pending_tail; + +/** + * Handle to the peerinfo service + */ +static struct GNUNET_PEERINFO_Handle *peerinfo_handle; + +/** + * Transmit handle to core service. + */ +static struct GNUNET_CORE_TransmitHandle * core_transmit_handle; + +/** + * Head of DLL for core messages + */ +static struct PendingMessage *core_pending_head; + +/** + * Tail of DLL for core messages + */ +static struct PendingMessage *core_pending_tail; + +/** + * Map of PeerIdentifiers to 'struct GNUNET_dv_neighbor*'s for all + * directly connected peers. + */ +static struct GNUNET_CONTAINER_MultiHashMap *direct_neighbors; + +/** + * Map of PeerIdentifiers to 'struct GNUNET_dv_neighbor*'s for + * peers connected via DV (extended neighborhood). Does ALSO + * include any peers that are in 'direct_neighbors'; for those + * peers, the cost will be zero and the referrer all zeros. + */ +static struct GNUNET_CONTAINER_MultiHashMap *extended_neighbors; + +/** + * We use the min heap (min refers to cost) to prefer + * gossipping about peers with small costs. + */ +static struct GNUNET_CONTAINER_Heap *neighbor_min_heap; + +/** + * We use the max heap (max refers to cost) for general + * iterations over all peers and to remove the most costly + * connection if we have too many. + */ +static struct GNUNET_CONTAINER_Heap *neighbor_max_heap; + +/** + * Handle for the statistics service. + */ +struct GNUNET_STATISTICS_Handle *stats; + +/** + * How far out to keep peers we learn about. + */ +static unsigned long long fisheye_depth; + +/** + * How many peers to store at most. + */ +static unsigned long long max_table_size; /** * We've been given a target ID based on the random numbers that @@ -375,6 +675,50 @@ find_destination (void *cls, return GNUNET_NO; } + +/** + * We've been given a target ID based on the random numbers that + * we assigned to our DV-neighborhood. Find the entry for the + * respective neighbor. + */ +static int +find_specific_id (void *cls, + const GNUNET_HashCode *key, + void *value) +{ + struct FindIDContext *fdc = cls; + struct DistantNeighbor *dn = value; + + if (memcmp(&dn->referrer->identity, fdc->via, sizeof(struct GNUNET_PeerIdentity)) == 0) + { + fdc->tid = dn->referrer_id; + return GNUNET_NO; + } + return GNUNET_YES; +} + +/** + * Find a distant peer whose referrer_id matches what we're + * looking for. For looking up a peer we've gossipped about + * but is now disconnected. Need to do this because we don't + * want to remove those that may be accessible via a different + * route. + */ +static int find_distant_peer (void *cls, + const GNUNET_HashCode * key, + void *value) +{ + struct FindDestinationContext *fdc = cls; + struct DistantNeighbor *distant = value; + + if (fdc->tid == distant->referrer_id) + { + fdc->dest = distant; + return GNUNET_NO; + } + return GNUNET_YES; +} + /** * Function called to notify a client about the socket * begin ready to queue more data. "buf" will be @@ -387,58 +731,156 @@ find_destination (void *cls, * @return number of bytes written to buf */ size_t transmit_to_plugin (void *cls, - size_t size, void *buf) + size_t size, void *buf) { - struct GNUNET_DV_MessageReceived *msg = cls; - int msize; + char *cbuf = buf; + struct PendingMessage *reply; + size_t off; + size_t msize; if (buf == NULL) - return 0; - - msize = ntohs(msg->header.size); - GNUNET_assert(size >= msize); + { + /* client disconnected */ +#if DEBUG_DV_MESSAGES + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s: %s buffer was NULL (client disconnect?)\n", my_short_id, "transmit_to_plugin"); +#endif + return 0; + } + plugin_transmit_handle = NULL; + off = 0; + while ( (NULL != (reply = plugin_pending_head)) && + (size >= off + (msize = ntohs (reply->msg->size)))) + { + GNUNET_CONTAINER_DLL_remove (plugin_pending_head, + plugin_pending_tail, + reply); + memcpy (&cbuf[off], reply->msg, msize); + GNUNET_free (reply); + off += msize; + } + if (plugin_pending_head != NULL) + plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle, + ntohs(plugin_pending_head->msg->size), + GNUNET_TIME_UNIT_FOREVER_REL, + &transmit_to_plugin, NULL); - memcpy(buf, msg, msize); - GNUNET_free(msg); - return msize; + return off; } - -void send_to_plugin(const struct GNUNET_PeerIdentity * sender, const struct GNUNET_MessageHeader *message, size_t message_size, struct DistantNeighbor *distant_neighbor) +/** + * Send a message to the dv plugin. + * + * @param sender the direct sender of the message + * @param message the message to send to the plugin + * (may be an encapsulated type) + * @param message_size the size of the message to be sent + * @param distant_neighbor the original sender of the message + * @param cost the cost to the original sender of the message + */ +void send_to_plugin(const struct GNUNET_PeerIdentity * sender, + const struct GNUNET_MessageHeader *message, + size_t message_size, + struct GNUNET_PeerIdentity *distant_neighbor, + size_t cost) { struct GNUNET_DV_MessageReceived *received_msg; + struct PendingMessage *pending_message; + char *sender_address; + size_t sender_address_len; + char *packed_msg_start; int size; - size = sizeof(struct GNUNET_DV_MessageReceived) + sizeof(struct GNUNET_PeerIdentity) + message_size; +#if DEBUG_DV + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_to_plugin called with peer %s as sender\n", GNUNET_i2s(distant_neighbor)); +#endif + + if (memcmp(sender, distant_neighbor, sizeof(struct GNUNET_PeerIdentity)) != 0) + { + sender_address_len = sizeof(struct GNUNET_PeerIdentity) * 2; + sender_address = GNUNET_malloc(sender_address_len); + memcpy(sender_address, distant_neighbor, sizeof(struct GNUNET_PeerIdentity)); + memcpy(&sender_address[sizeof(struct GNUNET_PeerIdentity)], sender, sizeof(struct GNUNET_PeerIdentity)); + } + else + { + sender_address_len = sizeof(struct GNUNET_PeerIdentity); + sender_address = GNUNET_malloc(sender_address_len); + memcpy(sender_address, sender, sizeof(struct GNUNET_PeerIdentity)); + } + + size = sizeof(struct GNUNET_DV_MessageReceived) + sender_address_len + message_size; received_msg = GNUNET_malloc(size); received_msg->header.size = htons(size); received_msg->header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_DV_RECEIVE); - received_msg->sender_address_len = sizeof(struct GNUNET_PeerIdentity); - received_msg->distance = htonl(distant_neighbor->cost); - received_msg->msg_len = htons(message_size); + received_msg->distance = htonl(cost); + received_msg->msg_len = htonl(message_size); /* Set the sender in this message to be the original sender! */ - memcpy(&received_msg->sender, &distant_neighbor->identity, sizeof(struct GNUNET_PeerIdentity)); + memcpy(&received_msg->sender, distant_neighbor, sizeof(struct GNUNET_PeerIdentity)); /* Copy the intermediate sender to the end of the message, this is how the transport identifies this peer */ - memcpy(&received_msg[1], sender, sizeof(struct GNUNET_PeerIdentity)); + memcpy(&received_msg[1], sender_address, sender_address_len); + GNUNET_free(sender_address); /* Copy the actual message after the sender */ - memcpy(&received_msg[1 + sizeof(struct GNUNET_PeerIdentity)], message, message_size); + packed_msg_start = (char *)&received_msg[1]; + packed_msg_start = &packed_msg_start[sender_address_len]; + memcpy(packed_msg_start, message, message_size); + pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + size); + pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1]; + memcpy(&pending_message[1], received_msg, size); + GNUNET_free(received_msg); - /* FIXME: Send to the client please */ - GNUNET_SERVER_notify_transmit_ready (client_handle, - size, client_transmit_timeout, - &transmit_to_plugin, &received_msg); + GNUNET_CONTAINER_DLL_insert_after(plugin_pending_head, plugin_pending_tail, plugin_pending_tail, pending_message); + if (client_handle != NULL) + { + if (plugin_transmit_handle == NULL) + { + plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle, + size, GNUNET_TIME_UNIT_FOREVER_REL, + &transmit_to_plugin, NULL); + } + } + else + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failed to queue message for plugin, client_handle not yet set (how?)!\n"); + } +} + +/* Declare here so retry_core_send is aware of it */ +size_t core_transmit_notify (void *cls, + size_t size, void *buf); + +/** + * Try to send another message from our core sending list + */ +static void +try_core_send (void *cls, + const struct GNUNET_SCHEDULER_TaskContext *tc) +{ + struct PendingMessage *pending; + pending = core_pending_head; + + if (core_transmit_handle != NULL) + return; /* Message send already in progress */ + + if ((pending != NULL) && (coreAPI != NULL)) + core_transmit_handle = GNUNET_CORE_notify_transmit_ready (coreAPI, + GNUNET_YES, + pending->importance, + pending->timeout, + &pending->recipient, + pending->msg_size, + &core_transmit_notify, NULL); } /** * Function called to notify a client about the socket - * begin ready to queue more data. "buf" will be + * being ready to queue more data. "buf" will be * NULL and "size" zero if the socket was closed for * writing in the meantime. * - * @param cls closure + * @param cls closure (NULL) * @param size number of bytes available in buf * @param buf where the callee should write the message * @return number of bytes written to buf @@ -446,36 +888,214 @@ void send_to_plugin(const struct GNUNET_PeerIdentity * sender, const struct GNUN size_t core_transmit_notify (void *cls, size_t size, void *buf) { - struct PendingMessage *pending_message = cls; - size_t ssize; + char *cbuf = buf; + struct PendingMessage *pending; + struct PendingMessage *client_reply; + size_t off; + size_t msize; if (buf == NULL) { - /* FIXME: error handling: try again? free pending_message? */ + /* client disconnected */ +#if DEBUG_DV + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "`%s': buffer was NULL\n", "DHT"); +#endif return 0; } - ssize = pending_message->msg_size; - GNUNET_assert(size >= ssize); - memcpy(buf, pending_message->msg, ssize); - GNUNET_free(pending_message->msg); - GNUNET_free(pending_message); - return ssize; + + core_transmit_handle = NULL; + off = 0; + pending = core_pending_head; + if ( (pending != NULL) && + (size >= (msize = ntohs (pending->msg->size)))) + { +#if DEBUG_DV + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "`%s' : transmit_notify (core) called with size %d\n", "dv service", msize); +#endif + GNUNET_CONTAINER_DLL_remove (core_pending_head, + core_pending_tail, + pending); + if (pending->send_result != NULL) /* Will only be non-null if a real client asked for this send */ + { + client_reply = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(struct GNUNET_DV_SendResultMessage)); + client_reply->msg = (struct GNUNET_MessageHeader *)&client_reply[1]; + memcpy(&client_reply[1], pending->send_result, sizeof(struct GNUNET_DV_SendResultMessage)); + GNUNET_free(pending->send_result); + + GNUNET_CONTAINER_DLL_insert_after(plugin_pending_head, plugin_pending_tail, plugin_pending_tail, client_reply); + if (client_handle != NULL) + { + if (plugin_transmit_handle == NULL) + { + plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle, + sizeof(struct GNUNET_DV_SendResultMessage), + GNUNET_TIME_UNIT_FOREVER_REL, + &transmit_to_plugin, NULL); + } + else + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failed to queue message for plugin, must be one in progress already!!\n"); + } + } + } + memcpy (&cbuf[off], pending->msg, msize); + GNUNET_free (pending); + off += msize; + } + /*reply = core_pending_head;*/ + + GNUNET_SCHEDULER_add_now(&try_core_send, NULL); + /*if (reply != NULL) + core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, GNUNET_YES, reply->importance, reply->timeout, &reply->recipient, reply->msg_size, &core_transmit_notify, NULL);*/ + + return off; +} + + +/** + * Send a DV data message via DV. + * + * @param sender the original sender of the message + * @param recipient the next hop recipient, may be our direct peer, maybe not + * @param send_context the send context + */ +static int +send_message_via (const struct GNUNET_PeerIdentity *sender, + const struct GNUNET_PeerIdentity *recipient, + struct DV_SendContext *send_context) +{ + p2p_dv_MESSAGE_Data *toSend; + unsigned int msg_size; + unsigned int recipient_id; + unsigned int sender_id; + struct DistantNeighbor *source; + struct PendingMessage *pending_message; + struct FindIDContext find_context; +#if DEBUG_DV + char shortname[5]; +#endif + + msg_size = send_context->message_size + sizeof (p2p_dv_MESSAGE_Data); + + find_context.dest = send_context->distant_peer; + find_context.via = recipient; + find_context.tid = 0; + GNUNET_CONTAINER_multihashmap_get_multiple (extended_neighbors, &send_context->distant_peer->hashPubKey, + &find_specific_id, &find_context); + + if (find_context.tid == 0) + { + GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: find_specific_id failed to find peer!\n", my_short_id); + /* target unknown to us, drop! */ + return GNUNET_SYSERR; + } + recipient_id = find_context.tid; + + if (0 == (memcmp (&my_identity, + sender, sizeof (struct GNUNET_PeerIdentity)))) + { + sender_id = 0; + source = GNUNET_CONTAINER_multihashmap_get (extended_neighbors, + &sender->hashPubKey); + if (source != NULL) + GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: send_message_via found %s, myself in extended peer list???\n", my_short_id, GNUNET_i2s(&source->identity)); + } + else + { + source = GNUNET_CONTAINER_multihashmap_get (extended_neighbors, + &sender->hashPubKey); + if (source == NULL) + { + /* sender unknown to us, drop! */ + return GNUNET_SYSERR; + } + sender_id = source->our_id; + } + + pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + msg_size); + pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1]; + pending_message->send_result = send_context->send_result; + memcpy(&pending_message->recipient, recipient, sizeof(struct GNUNET_PeerIdentity)); + pending_message->msg_size = msg_size; + pending_message->importance = send_context->importance; + pending_message->timeout = send_context->timeout; + toSend = (p2p_dv_MESSAGE_Data *)pending_message->msg; + toSend->header.size = htons (msg_size); + toSend->header.type = htons (GNUNET_MESSAGE_TYPE_DV_DATA); + toSend->sender = htonl (sender_id); + toSend->recipient = htonl (recipient_id); +#if DEBUG_DV_MESSAGES + toSend->uid = send_context->uid; /* Still sent around in network byte order */ +#else + toSend->uid = htonl(0); +#endif + + memcpy (&toSend[1], send_context->message, send_context->message_size); + +#if DEBUG_DV + memcpy(&shortname, GNUNET_i2s(send_context->distant_peer), 4); + shortname[4] = '\0'; + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Notifying core of send to destination `%s' via `%s' size %u\n", "DV", &shortname, GNUNET_i2s(recipient), msg_size); +#endif + + GNUNET_CONTAINER_DLL_insert_after (core_pending_head, + core_pending_tail, + core_pending_tail, + pending_message); + + GNUNET_SCHEDULER_add_now(try_core_send, NULL); + + return GNUNET_YES; +} + +/** + * Given a FindLeastCostContext, and a set + * of peers that match the target, return the cheapest. + * + * @param cls closure, a struct FindLeastCostContext + * @param key the key identifying the target peer + * @param value the target peer + * + * @return GNUNET_YES to continue iteration, GNUNET_NO to stop + */ +static int +find_least_cost_peer (void *cls, + const GNUNET_HashCode *key, + void *value) +{ + struct FindLeastCostContext *find_context = cls; + struct DistantNeighbor *dn = value; + + if (dn->cost < find_context->least_cost) + { + find_context->target = dn; + } + if (dn->cost == DIRECT_NEIGHBOR_COST) + return GNUNET_NO; + return GNUNET_YES; } /** * Send a DV data message via DV. * * @param recipient the ultimate recipient of this message - * @param the original sender of the message + * @param sender the original sender of the message + * @param specific_neighbor the specific neighbor to send this message via * @param message the packed message + * @param message_size size of the message * @param importance what priority to send this message with + * @param uid the unique identifier of this message (or 0 for none) * @param timeout how long to possibly delay sending this message */ static int send_message (const struct GNUNET_PeerIdentity * recipient, const struct GNUNET_PeerIdentity * sender, + const struct DistantNeighbor * specific_neighbor, const struct GNUNET_MessageHeader * message, - unsigned int importance, struct GNUNET_TIME_Relative timeout) + size_t message_size, + unsigned int importance, + unsigned int uid, + struct GNUNET_TIME_Relative timeout) { p2p_dv_MESSAGE_Data *toSend; unsigned int msg_size; @@ -485,11 +1105,26 @@ send_message (const struct GNUNET_PeerIdentity * recipient, struct DistantNeighbor *target; struct DistantNeighbor *source; struct PendingMessage *pending_message; + struct FindLeastCostContext find_least_ctx; +#if DEBUG_DV_PEER_NUMBERS + struct GNUNET_CRYPTO_HashAsciiEncoded encPeerFrom; + struct GNUNET_CRYPTO_HashAsciiEncoded encPeerTo; + struct GNUNET_CRYPTO_HashAsciiEncoded encPeerVia; +#endif + msg_size = message_size + sizeof (p2p_dv_MESSAGE_Data); - msg_size = ntohs (message->size) + sizeof (p2p_dv_MESSAGE_Data); + find_least_ctx.least_cost = -1; + find_least_ctx.target = NULL; + /* + * Need to find the least cost peer, lest the transport selection keep + * picking the same DV route for the same destination which results + * in messages looping forever. Relatively cheap, we don't iterate + * over all known peers, just those that apply. + */ + GNUNET_CONTAINER_multihashmap_get_multiple (extended_neighbors, + &recipient->hashPubKey, &find_least_cost_peer, &find_least_ctx); + target = find_least_ctx.target; - target = GNUNET_CONTAINER_multihashmap_get (ctx.extended_neighbors, - &recipient->hashPubKey); if (target == NULL) { /* target unknown to us, drop! */ @@ -497,8 +1132,8 @@ send_message (const struct GNUNET_PeerIdentity * recipient, } recipient_id = target->referrer_id; - source = GNUNET_CONTAINER_multihashmap_get (ctx.extended_neighbors, - &sender->hashPubKey); + source = GNUNET_CONTAINER_multihashmap_get (extended_neighbors, + &sender->hashPubKey); if (source == NULL) { if (0 != (memcmp (&my_identity, @@ -516,30 +1151,199 @@ send_message (const struct GNUNET_PeerIdentity * recipient, sender_id = source->our_id; } +#if DEBUG_DV_PEER_NUMBERS + GNUNET_CRYPTO_hash_to_enc (&source->identity.hashPubKey, &encPeerFrom); + GNUNET_CRYPTO_hash_to_enc (&target->referrer->identity.hashPubKey, &encPeerVia); + encPeerFrom.encoding[4] = '\0'; + encPeerVia.encoding[4] = '\0'; +#endif + if ((sender_id != 0) && (0 == memcmp(&source->identity, &target->referrer->identity, sizeof(struct GNUNET_PeerIdentity)))) + { + return 0; + } + cost = target->cost; - pending_message = GNUNET_malloc(sizeof(struct PendingMessage)); - pending_message->msg = GNUNET_malloc (msg_size); + pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + msg_size); + pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1]; + pending_message->send_result = NULL; + pending_message->importance = importance; + pending_message->timeout = timeout; + memcpy(&pending_message->recipient, &target->referrer->identity, sizeof(struct GNUNET_PeerIdentity)); + pending_message->msg_size = msg_size; toSend = (p2p_dv_MESSAGE_Data *)pending_message->msg; toSend->header.size = htons (msg_size); toSend->header.type = htons (GNUNET_MESSAGE_TYPE_DV_DATA); toSend->sender = htonl (sender_id); toSend->recipient = htonl (recipient_id); - memcpy (&toSend[1], message, ntohs (message->size)); - pending_message->msg_size = msg_size; +#if DEBUG_DV_MESSAGES + toSend->uid = htonl(uid); +#else + toSend->uid = htonl(0); +#endif - pending_message->transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, importance, timeout, &target->referrer->identity, msg_size, &core_transmit_notify, pending_message); - if (NULL == pending_message->transmit_handle) +#if DEBUG_DV_PEER_NUMBERS + GNUNET_CRYPTO_hash_to_enc (&target->identity.hashPubKey, &encPeerTo); + encPeerTo.encoding[4] = '\0'; + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Sending DATA message. Sender id %u, source %s, destination %s, via %s\n", GNUNET_i2s(&my_identity), sender_id, &encPeerFrom, &encPeerTo, &encPeerVia); +#endif + memcpy (&toSend[1], message, message_size); + if ((source != NULL) && (source->pkey == NULL)) /* Test our hypothesis about message failures! */ { - GNUNET_free (pending_message->msg); - GNUNET_free (pending_message); - return GNUNET_SYSERR; + GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: Sending message, but anticipate recipient will not know sender!!!\n\n\n", my_short_id); } + GNUNET_CONTAINER_DLL_insert_after (core_pending_head, + core_pending_tail, + core_pending_tail, + pending_message); +#if DEBUG_DV + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Notifying core of send size %d to destination `%s'\n", "DV SEND MESSAGE", msg_size, GNUNET_i2s(recipient)); +#endif - /*coreAPI->ciphertext_send (&target->referrer->identity, - &toSend->header, importance, maxdelay);*/ + GNUNET_SCHEDULER_add_now(try_core_send, NULL); return (int) cost; } +#if USE_PEER_ID +struct CheckPeerContext +{ + /** + * Peer we found + */ + struct DistantNeighbor *peer; + + /** + * Sender id to search for + */ + unsigned int sender_id; +}; + +/** + * Iterator over hash map entries. + * + * @param cls closure + * @param key current key code + * @param value value in the hash map + * @return GNUNET_YES if we should continue to + * iterate, + * GNUNET_NO if not. + */ +int checkPeerID (void *cls, + const GNUNET_HashCode * key, + void *value) +{ + struct CheckPeerContext *ctx = cls; + struct DistantNeighbor *distant = value; + + if (memcmp(key, &ctx->sender_id, sizeof(unsigned int)) == 0) + { + ctx->peer = distant; + return GNUNET_NO; + } + return GNUNET_YES; + +} +#endif + + +/** + * Handler for messages parsed out by the tokenizer from + * DV DATA received for this peer. + * + * @param cls NULL + * @param client the TokenizedMessageContext which contains message information + * @param message the actual message + */ +void tokenized_message_handler (void *cls, + void *client, + const struct GNUNET_MessageHeader *message) +{ + struct TokenizedMessageContext *ctx = client; + GNUNET_break_op (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_GOSSIP); + GNUNET_break_op (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_DATA); + if ( (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_GOSSIP) && + (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_DATA) ) + { +#if DEBUG_DV_MESSAGES + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "%s: Receives %s message for me, uid %u, size %d, type %d cost %u from %s!\n", my_short_id, "DV DATA", ctx->uid, ntohs(message->size), ntohs(message->type), ctx->distant->cost, GNUNET_i2s(&ctx->distant->identity)); +#endif + GNUNET_assert(memcmp(ctx->peer, &ctx->distant->identity, sizeof(struct GNUNET_PeerIdentity)) != 0); + send_to_plugin(ctx->peer, message, ntohs(message->size), &ctx->distant->identity, ctx->distant->cost); + } +} + +#if DELAY_FORWARDS +struct DelayedMessageContext +{ + struct GNUNET_PeerIdentity dest; + struct GNUNET_PeerIdentity sender; + struct GNUNET_MessageHeader *message; + size_t message_size; + uint32_t uid; +}; + +void send_message_delayed (void *cls, + const struct GNUNET_SCHEDULER_TaskContext *tc) +{ + struct DelayedMessageContext *msg_ctx = cls; + if (msg_ctx != NULL) + { + send_message(&msg_ctx->dest, + &msg_ctx->sender, + NULL, + msg_ctx->message, + msg_ctx->message_size, + default_dv_priority, + msg_ctx->uid, + GNUNET_TIME_relative_get_forever()); + GNUNET_free(msg_ctx->message); + GNUNET_free(msg_ctx); + } +} +#endif + +/** + * Get distance information from 'atsi'. + * + * @param atsi performance data + * @return connected transport distance + */ +static uint32_t +get_atsi_distance (const struct GNUNET_TRANSPORT_ATS_Information *atsi) +{ + while ( (ntohl (atsi->type) != GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR) && + (ntohl (atsi->type) != GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE) ) + atsi++; + if (ntohl (atsi->type) == GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR) + { + GNUNET_break (0); + /* FIXME: we do not have distance data? Assume direct neighbor. */ + return DIRECT_NEIGHBOR_COST; + } + return ntohl (atsi->value); +} + +/** + * Find latency information in 'atsi'. + * + * @param atsi performance data + * @return connection latency + */ +static struct GNUNET_TIME_Relative +get_atsi_latency (const struct GNUNET_TRANSPORT_ATS_Information *atsi) +{ + while ( (ntohl (atsi->type) != GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR) && + (ntohl (atsi->type) != GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY) ) + atsi++; + if (ntohl (atsi->type) == GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR) + { + GNUNET_break (0); + /* how can we not have latency data? */ + return GNUNET_TIME_UNIT_SECONDS; + } + /* FIXME: Multiply by GNUNET_TIME_UNIT_MILLISECONDS (1) to get as a GNUNET_TIME_Relative */ + return GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS, ntohl (atsi->value)); +} /** * Core handler for dv data messages. Whatever this message @@ -550,73 +1354,152 @@ send_message (const struct GNUNET_PeerIdentity * recipient, * @param cls closure * @param peer peer which sent the message (immediate sender) * @param message the message - * @param latency the latency of the connection we received the message from - * @param distance the distance to the immediate peer - */ -static int handle_dv_data_message (void *cls, - const struct GNUNET_PeerIdentity * peer, - const struct GNUNET_MessageHeader * message, - struct GNUNET_TIME_Relative latency, - uint32_t distance) + * @param atsi transport ATS information (latency, distance, etc.) + */ +static int +handle_dv_data_message (void *cls, + const struct GNUNET_PeerIdentity * peer, + const struct GNUNET_MessageHeader * message, + const struct GNUNET_TRANSPORT_ATS_Information *atsi) { -#if DEBUG_DV - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "%s: Receives %s message!\n", "dv", "DV DATA"); -#endif - const p2p_dv_MESSAGE_Data *incoming = (const p2p_dv_MESSAGE_Data *) message; - const struct GNUNET_MessageHeader *packed_message = (const struct GNUNET_MessageHeader *) &incoming[1]; + const struct GNUNET_MessageHeader *packed_message; struct DirectNeighbor *dn; struct DistantNeighbor *pos; unsigned int sid; /* Sender id */ unsigned int tid; /* Target id */ - struct GNUNET_PeerIdentity original_sender; - struct GNUNET_PeerIdentity destination; + struct GNUNET_PeerIdentity *original_sender; + struct GNUNET_PeerIdentity *destination; struct FindDestinationContext fdc; + struct TokenizedMessageContext tkm_ctx; + int i; + int found_pos; +#if DELAY_FORWARDS + struct DelayedMessageContext *delayed_context; +#endif +#if USE_PEER_ID + struct CheckPeerContext checkPeerCtx; +#endif +#if DEBUG_DV_MESSAGES + char *sender_id; +#endif int ret; + size_t packed_message_size; + char *cbuf; + uint32_t distance; /* Distance information */ + struct GNUNET_TIME_Relative latency; /* Latency information */ - if ((ntohs (incoming->header.size) < - sizeof (p2p_dv_MESSAGE_Data) + sizeof (struct GNUNET_MessageHeader)) - || (ntohs (incoming->header.size) != - (sizeof (p2p_dv_MESSAGE_Data) + ntohs (packed_message->size)))) + packed_message_size = ntohs(incoming->header.size) - sizeof(p2p_dv_MESSAGE_Data); +#if DEBUG_DV + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "%s: Receives DATA message from %s size %d, packed size %d!\n", my_short_id, GNUNET_i2s(peer) , ntohs(incoming->header.size), packed_message_size); +#endif + + if (ntohs (incoming->header.size) < sizeof (p2p_dv_MESSAGE_Data) + sizeof (struct GNUNET_MessageHeader)) { +#if DEBUG_DV + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "`%s': Message sizes don't add up, total size %u, expected at least %u!\n", "dv service", ntohs(incoming->header.size), sizeof (p2p_dv_MESSAGE_Data) + sizeof (struct GNUNET_MessageHeader)); +#endif return GNUNET_SYSERR; } - dn = GNUNET_CONTAINER_multihashmap_get (ctx.direct_neighbors, - &peer->hashPubKey); + /* Iterate over ATS_Information to get distance and latency */ + latency = get_atsi_latency(atsi); + distance = get_atsi_distance(atsi); + dn = GNUNET_CONTAINER_multihashmap_get (direct_neighbors, + &peer->hashPubKey); if (dn == NULL) - { - return GNUNET_OK; - } + return GNUNET_OK; + sid = ntohl (incoming->sender); +#if USE_PEER_ID + if (sid != 0) + { + checkPeerCtx.sender_id = sid; + checkPeerCtx.peer = NULL; + GNUNET_CONTAINER_multihashmap_iterate(extended_neighbors, &checkPeerID, &checkPeerCtx); + pos = checkPeerCtx.peer; + } + else + { + pos = GNUNET_CONTAINER_multihashmap_get (extended_neighbors, + &peer->hashPubKey); + } +#else pos = dn->referee_head; while ((NULL != pos) && (pos->referrer_id != sid)) pos = pos->next; +#endif + if (pos == NULL) { +#if DEBUG_DV_MESSAGES + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "%s: unknown sender (%u), Message uid %u from %s!\n", my_short_id, ntohl(incoming->sender), ntohl(incoming->uid), GNUNET_i2s(&dn->identity)); + pos = dn->referee_head; + while ((NULL != pos) && (pos->referrer_id != sid)) + { + sender_id = strdup(GNUNET_i2s(&pos->identity)); + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "I know sender %u %s\n", pos->referrer_id, sender_id); + GNUNET_free(sender_id); + pos = pos->next; + } +#endif + + found_pos = -1; + for (i = 0; i< MAX_OUTSTANDING_MESSAGES; i++) + { + if (dn->pending_messages[i].sender_id == 0) + { + found_pos = i; + break; + } + } + + if (found_pos == -1) + { + GNUNET_log (GNUNET_ERROR_TYPE_WARNING, + "%s: Too many unknown senders (%u), ignoring message! Message uid %llu from %s!\n", my_short_id, ntohl(incoming->sender), ntohl(incoming->uid), GNUNET_i2s(&dn->identity)); + } + else + { + dn->pending_messages[found_pos].message = GNUNET_malloc(ntohs (message->size)); + memcpy(dn->pending_messages[found_pos].message, message, ntohs(message->size)); + dn->pending_messages[found_pos].distance = distance; + dn->pending_messages[found_pos].latency = latency; + memcpy(&dn->pending_messages[found_pos].sender, peer, sizeof(struct GNUNET_PeerIdentity)); + dn->pending_messages[found_pos].sender_id = sid; + } /* unknown sender */ return GNUNET_OK; } - original_sender = pos->identity; + original_sender = &pos->identity; tid = ntohl (incoming->recipient); if (tid == 0) { /* 0 == us */ - - /* FIXME: Will we support wrapped messages being these types? Probably not, they should - * be encrypted messages that need decrypting and junk like that. - */ - GNUNET_break_op (ntohs (packed_message->type) != GNUNET_MESSAGE_TYPE_DV_GOSSIP); - GNUNET_break_op (ntohs (packed_message->type) != GNUNET_MESSAGE_TYPE_DV_DATA); - if ( (ntohs (packed_message->type) != GNUNET_MESSAGE_TYPE_DV_GOSSIP) && - (ntohs (packed_message->type) != GNUNET_MESSAGE_TYPE_DV_DATA) ) - { - send_to_plugin(peer, packed_message, ntohs(packed_message->size), pos); - } - + cbuf = (char *)&incoming[1]; + + tkm_ctx.peer = peer; + tkm_ctx.distant = pos; + tkm_ctx.uid = ntohl(incoming->uid); + if (GNUNET_OK != GNUNET_SERVER_mst_receive (coreMST, + &tkm_ctx, + cbuf, + packed_message_size, + GNUNET_NO, + GNUNET_NO)) + { + GNUNET_break_op(0); + GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: %s Received corrupt data, discarding!", my_short_id, "DV SERVICE"); + } return GNUNET_OK; } + else + { + packed_message = (struct GNUNET_MessageHeader *)&incoming[1]; + } /* FIXME: this is the *only* per-request operation we have in DV that is O(n) in relation to the number of connected peers; a @@ -624,85 +1507,165 @@ static int handle_dv_data_message (void *cls, issue) */ fdc.tid = tid; fdc.dest = NULL; - GNUNET_CONTAINER_heap_iterate (ctx.neighbor_max_heap, + GNUNET_CONTAINER_heap_iterate (neighbor_max_heap, &find_destination, &fdc); + +#if DEBUG_DV + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "%s: Receives %s message for someone else!\n", "dv", "DV DATA"); +#endif + if (fdc.dest == NULL) { +#if DEBUG_DV_MESSAGES + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "%s: Receives %s message uid %u for someone we don't know (id %u)!\n", my_short_id, "DV DATA", ntohl(incoming->uid), tid); +#endif return GNUNET_OK; } - destination = fdc.dest->identity; + destination = &fdc.dest->identity; - if (0 == memcmp (&destination, peer, sizeof (struct GNUNET_PeerIdentity))) + if (0 == memcmp (destination, peer, sizeof (struct GNUNET_PeerIdentity))) { /* FIXME: create stat: routing loop-discard! */ + +#if DEBUG_DV_MESSAGES + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "%s: DROPPING MESSAGE uid %u type %d, routing loop! Message immediately from %s!\n", my_short_id, ntohl(incoming->uid), ntohs(packed_message->type), GNUNET_i2s(&dn->identity)); +#endif return GNUNET_OK; } /* At this point we have a message, and we need to forward it on to the * next DV hop. */ - /* FIXME: Can't send message on, we have to behave. - * We have to tell core we have a message for the next peer, and let - * transport do transport selection on how to get this message to 'em */ - /*ret = send_message (&destination, - &original_sender, - packed_message, DV_PRIORITY, DV_DELAY);*/ - ret = send_message(&destination, &original_sender, packed_message, default_dv_priority, default_dv_delay); +#if DEBUG_DV_MESSAGES + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "%s: FORWARD %s message for %s, uid %u, size %d type %d, cost %u!\n", my_short_id, "DV DATA", GNUNET_i2s(destination), ntohl(incoming->uid), ntohs(packed_message->size), ntohs(packed_message->type), pos->cost); +#endif +#if DELAY_FORWARDS + if (GNUNET_TIME_absolute_get_duration(pos->last_gossip).abs_value < GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 2).abs_value) + { + delayed_context = GNUNET_malloc(sizeof(struct DelayedMessageContext)); + memcpy(&delayed_context->dest, destination, sizeof(struct GNUNET_PeerIdentity)); + memcpy(&delayed_context->sender, original_sender, sizeof(struct GNUNET_PeerIdentity)); + delayed_context->message = GNUNET_malloc(packed_message_size); + memcpy(delayed_context->message, packed_message, packed_message_size); + delayed_context->message_size = packed_message_size; + delayed_context->uid = ntohl(incoming->uid); + GNUNET_SCHEDULER_add_delayed(GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS, 2500), &send_message_delayed, delayed_context); + return GNUNET_OK; + } + else +#endif + { + ret = send_message(destination, + original_sender, + NULL, + packed_message, + packed_message_size, + default_dv_priority, + ntohl(incoming->uid), + GNUNET_TIME_relative_get_forever()); + } if (ret != GNUNET_SYSERR) return GNUNET_OK; else - return GNUNET_SYSERR; + { +#if DEBUG_MESSAGE_DROP + char *direct_id = GNUNET_strdup(GNUNET_i2s(&dn->identity)); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "%s: DROPPING MESSAGE type %d, forwarding failed! Message immediately from %s!\n", GNUNET_i2s(&my_identity), ntohs(((struct GNUNET_MessageHeader *)&incoming[1])->type), direct_id); + GNUNET_free (direct_id); +#endif + return GNUNET_SYSERR; + } } +#if DEBUG_DV +/** + * Iterator over hash map entries. + * + * @param cls closure (NULL) + * @param key current key code + * @param value value in the hash map (DistantNeighbor) + * @return GNUNET_YES if we should continue to + * iterate, + * GNUNET_NO if not. + */ +int print_neighbors (void *cls, + const GNUNET_HashCode * key, + void *abs_value) +{ + struct DistantNeighbor *distant_neighbor = abs_value; + char my_shortname[5]; + char referrer_shortname[5]; + memcpy(&my_shortname, GNUNET_i2s(&my_identity), 4); + my_shortname[4] = '\0'; + memcpy(&referrer_shortname, GNUNET_i2s(&distant_neighbor->referrer->identity), 4); + referrer_shortname[4] = '\0'; + + GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "`%s' %s: Peer `%s', distance %d, referrer `%s' pkey: %s\n", &my_shortname, "DV", GNUNET_i2s(&distant_neighbor->identity), distant_neighbor->cost, &referrer_shortname, distant_neighbor->pkey == NULL ? "no" : "yes"); + return GNUNET_YES; +} +#endif /** - * Thread which chooses a peer to gossip about and a peer to gossip - * to, then constructs the message and sends it out. Will run until - * done_module_dv is called. + * Scheduled task which gossips about known direct peers to other connected + * peers. Will run until called with reason shutdown. */ static void neighbor_send_task (void *cls, - const struct GNUNET_SCHEDULER_TaskContext *tc) + const struct GNUNET_SCHEDULER_TaskContext *tc) { struct NeighborSendContext *send_context = cls; -#if DEBUG_DV - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "%s: Entering neighbor_send_task...\n", - GNUNET_i2s(&my_identity)); +#if DEBUG_DV_GOSSIP_SEND char * encPeerAbout; char * encPeerTo; #endif struct DistantNeighbor *about; struct DirectNeighbor *to; + struct FastGossipNeighborList *about_list; p2p_dv_MESSAGE_NeighborInfo *message; struct PendingMessage *pending_message; - if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN) - { -#if DEBUG_DV + if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0) + { +#if DEBUG_DV_GOSSIP GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s: Called with reason shutdown, shutting down!\n", GNUNET_i2s(&my_identity)); #endif - send_context->toNeighbor->send_context = NULL; - GNUNET_free(send_context); - return; - } - + return; + } - /* FIXME: this may become a problem, because the heap walk has only one internal "walker". This means - * that if two neighbor_send_tasks are operating in lockstep (which is quite possible, given default - * values for all connected peers) there may be a serious bias as to which peers get gossiped about! - * Probably the *best* way to fix would be to have an opaque pointer to the walk position passed as - * part of the walk_get_next call. Then the heap would have to keep a list of walks, or reset the walk - * whenever a modification has been detected. Yuck either way. Perhaps we could iterate over the heap - * once to get a list of peers to gossip about and gossip them over time... But then if one goes away - * in the mean time that becomes nasty. For now we'll just assume that the walking is done - * asynchronously enough to avoid major problems (-; - */ - about = GNUNET_CONTAINER_heap_walk_get_next (ctx.neighbor_min_heap); + if (send_context->fast_gossip_list_head != NULL) + { + about_list = send_context->fast_gossip_list_head; + about = about_list->about; + GNUNET_CONTAINER_DLL_remove(send_context->fast_gossip_list_head, + send_context->fast_gossip_list_tail, + about_list); + GNUNET_free(about_list); + } + else + { + /* FIXME: this may become a problem, because the heap walk has only one internal "walker". This means + * that if two neighbor_send_tasks are operating in lockstep (which is quite possible, given default + * values for all connected peers) there may be a serious bias as to which peers get gossiped about! + * Probably the *best* way to fix would be to have an opaque pointer to the walk position passed as + * part of the walk_get_next call. Then the heap would have to keep a list of walks, or reset the walk + * whenever a modification has been detected. Yuck either way. Perhaps we could iterate over the heap + * once to get a list of peers to gossip about and gossip them over time... But then if one goes away + * in the mean time that becomes nasty. For now we'll just assume that the walking is done + * asynchronously enough to avoid major problems (-; + * + * NOTE: probably fixed once we decided send rate based on allowed bandwidth. + */ + about = GNUNET_CONTAINER_heap_walk_get_next (neighbor_min_heap); + } to = send_context->toNeighbor; if ((about != NULL) && (to != about->referrer /* split horizon */ ) && @@ -711,47 +1674,119 @@ neighbor_send_task (void *cls, #endif (to != NULL) && (0 != memcmp (&about->identity, - &to->identity, sizeof (struct GNUNET_PeerIdentity)))) + &to->identity, sizeof (struct GNUNET_PeerIdentity))) && + (about->pkey != NULL)) { -#if DEBUG_DV +#if DEBUG_DV_GOSSIP_SEND encPeerAbout = GNUNET_strdup(GNUNET_i2s(&about->identity)); encPeerTo = GNUNET_strdup(GNUNET_i2s(&to->identity)); GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "%s: Sending info about peer %s to directly connected peer %s\n", + "%s: Sending info about peer %s id %u to directly connected peer %s\n", GNUNET_i2s(&my_identity), - encPeerAbout, encPeerTo); + encPeerAbout, about->our_id, encPeerTo); GNUNET_free(encPeerAbout); GNUNET_free(encPeerTo); #endif - pending_message = GNUNET_malloc(sizeof(struct PendingMessage)); - pending_message->msg = GNUNET_malloc(sizeof(p2p_dv_MESSAGE_NeighborInfo)); + about->last_gossip = GNUNET_TIME_absolute_get(); + pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(p2p_dv_MESSAGE_NeighborInfo)); + pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1]; + pending_message->importance = default_dv_priority; + pending_message->timeout = GNUNET_TIME_relative_get_forever(); + memcpy(&pending_message->recipient, &to->identity, sizeof(struct GNUNET_PeerIdentity)); + pending_message->msg_size = sizeof(p2p_dv_MESSAGE_NeighborInfo); message = (p2p_dv_MESSAGE_NeighborInfo *)pending_message->msg; message->header.size = htons (sizeof (p2p_dv_MESSAGE_NeighborInfo)); message->header.type = htons (GNUNET_MESSAGE_TYPE_DV_GOSSIP); message->cost = htonl (about->cost); message->neighbor_id = htonl (about->our_id); + + memcpy (&message->pkey, about->pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded)); memcpy (&message->neighbor, &about->identity, sizeof (struct GNUNET_PeerIdentity)); - pending_message->msg_size = sizeof(p2p_dv_MESSAGE_NeighborInfo); - pending_message->transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, default_dv_priority, default_dv_delay, &to->identity, sizeof(p2p_dv_MESSAGE_NeighborInfo), &core_transmit_notify, pending_message); + GNUNET_CONTAINER_DLL_insert_after (core_pending_head, + core_pending_tail, + core_pending_tail, + pending_message); + + GNUNET_SCHEDULER_add_now(try_core_send, NULL); + /*if (core_transmit_handle == NULL) + core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, GNUNET_YES, default_dv_priority, GNUNET_TIME_relative_get_forever(), &to->identity, sizeof(p2p_dv_MESSAGE_NeighborInfo), &core_transmit_notify, NULL);*/ - if (NULL == pending_message->transmit_handle) - { - GNUNET_free (pending_message->msg); - GNUNET_free (pending_message); - return; - } - /*coreAPI->ciphertext_send (&to->identity, &message.header, - GNUNET_DV_DHT_GOSSIP_PRIORITY, - ctx.send_interval);*/ } - GNUNET_SCHEDULER_add_delayed(sched, send_context->timeout, &neighbor_send_task, send_context); + if (send_context->fast_gossip_list_head != NULL) /* If there are other peers in the fast list, schedule right away */ + { +#if DEBUG_DV_PEER_NUMBERS + GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "DV SERVICE: still in fast send mode\n"); +#endif + send_context->task = GNUNET_SCHEDULER_add_now(&neighbor_send_task, send_context); + } + else + { +#if DEBUG_DV_PEER_NUMBERS + GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "DV SERVICE: entering slow send mode\n"); +#endif + send_context->task = GNUNET_SCHEDULER_add_delayed(GNUNET_DV_DEFAULT_SEND_INTERVAL, &neighbor_send_task, send_context); + } + return; } +/** + * Handle START-message. This is the first message sent to us + * by the client (can only be one!). + * + * @param cls closure (always NULL) + * @param client identification of the client + * @param message the actual message + */ +static void +handle_start (void *cls, + struct GNUNET_SERVER_Client *client, + const struct GNUNET_MessageHeader *message) +{ + +#if DEBUG_DV + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Received `%s' request from client\n", "START"); +#endif + + client_handle = client; + + GNUNET_SERVER_client_keep(client_handle); + GNUNET_SERVER_receive_done (client, GNUNET_OK); +} + +#if UNSIMPLER +/** + * Iterate over hash map entries for a distant neighbor, + * if direct neighbor matches context call send message + * + * @param cls closure, a DV_SendContext + * @param key current key code + * @param value value in the hash map + * @return GNUNET_YES if we should continue to + * iterate, + * GNUNET_NO if not. + */ +int send_iterator (void *cls, + const GNUNET_HashCode * key, + void *abs_value) +{ + struct DV_SendContext *send_context = cls; + struct DistantNeighbor *distant_neighbor = abs_value; + + if (memcmp(distant_neighbor->referrer, send_context->direct_peer, sizeof(struct GNUNET_PeerIdentity)) == 0) /* They match, send and free */ + { + send_message_via(&my_identity, distant_neighbor, send_context); + return GNUNET_NO; + } + return GNUNET_YES; +} +#endif + /** * Service server's handler for message send requests (which come * bubbling up to us through the DV plugin). @@ -760,38 +1795,182 @@ neighbor_send_task (void *cls, * @param client identification of the client * @param message the actual message */ -void send_dv_message (void *cls, - struct GNUNET_SERVER_Client * client, - const struct GNUNET_MessageHeader * message) +void handle_dv_send_message (void *cls, + struct GNUNET_SERVER_Client * client, + const struct GNUNET_MessageHeader * message) { -#if DEBUG_DV - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "%s: Receives %s message!\n", "dv", "SEND"); + struct GNUNET_DV_SendMessage *send_msg; + struct GNUNET_DV_SendResultMessage *send_result_msg; + struct PendingMessage *pending_message; + size_t address_len; + size_t message_size; + struct GNUNET_PeerIdentity *destination; + struct GNUNET_PeerIdentity *direct; + struct GNUNET_MessageHeader *message_buf; + char *temp_pos; + int offset; + static struct GNUNET_CRYPTO_HashAsciiEncoded dest_hash; + struct DV_SendContext *send_context; +#if DEBUG_DV_MESSAGES + char *cbuf; + struct GNUNET_MessageHeader *packed_message; #endif + if (client_handle == NULL) { client_handle = client; -#if DEBUG_DV - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "%s: Setting initial client handle!\n", "dv"); -#endif + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "%s: Setting initial client handle, never received `%s' message?\n", "dv", "START"); } else if (client_handle != client) { client_handle = client; /* What should we do in this case, assert fail or just log the warning? */ - GNUNET_log (GNUNET_ERROR_TYPE_WARNING, +#if DEBUG_DV + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s: Setting client handle (was a different client!)!\n", "dv"); +#endif } + GNUNET_assert(ntohs(message->size) > sizeof(struct GNUNET_DV_SendMessage)); + send_msg = (struct GNUNET_DV_SendMessage *)message; + + address_len = ntohl(send_msg->addrlen); + GNUNET_assert(address_len == sizeof(struct GNUNET_PeerIdentity) * 2); + message_size = ntohs(message->size) - sizeof(struct GNUNET_DV_SendMessage) - address_len; + destination = GNUNET_malloc(sizeof(struct GNUNET_PeerIdentity)); + direct = GNUNET_malloc(sizeof(struct GNUNET_PeerIdentity)); + message_buf = GNUNET_malloc(message_size); + + temp_pos = (char *)&send_msg[1]; /* Set pointer to end of message */ + offset = 0; /* Offset starts at zero */ + + memcpy(destination, &temp_pos[offset], sizeof(struct GNUNET_PeerIdentity)); + offset += sizeof(struct GNUNET_PeerIdentity); + + memcpy(direct, &temp_pos[offset], sizeof(struct GNUNET_PeerIdentity)); + offset += sizeof(struct GNUNET_PeerIdentity); + + + memcpy(message_buf, &temp_pos[offset], message_size); + if (memcmp(&send_msg->target, destination, sizeof(struct GNUNET_PeerIdentity)) != 0) + { + GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */ + dest_hash.encoding[4] = '\0'; + GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: asked to send message to `%s', but address is for `%s'!", "DV SERVICE", GNUNET_i2s(&send_msg->target), (const char *)&dest_hash.encoding); + } + +#if DEBUG_DV_MESSAGES + cbuf = (char *)message_buf; + offset = 0; + while(offset < message_size) + { + packed_message = (struct GNUNET_MessageHeader *)&cbuf[offset]; + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: DV PLUGIN SEND uid %u type %d to %s\n", my_short_id, ntohl(send_msg->uid), ntohs(packed_message->type), GNUNET_i2s(destination)); + offset += ntohs(packed_message->size); + } + /*GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: DV PLUGIN SEND uid %u type %d to %s\n", my_short_id, ntohl(send_msg->uid), ntohs(message_buf->type), GNUNET_i2s(destination));*/ +#endif + GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */ + dest_hash.encoding[4] = '\0'; + send_context = GNUNET_malloc(sizeof(struct DV_SendContext)); + + send_result_msg = GNUNET_malloc(sizeof(struct GNUNET_DV_SendResultMessage)); + send_result_msg->header.size = htons(sizeof(struct GNUNET_DV_SendResultMessage)); + send_result_msg->header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_DV_SEND_RESULT); + send_result_msg->uid = send_msg->uid; /* No need to ntohl->htonl this */ + + send_context->importance = ntohl(send_msg->priority); + send_context->timeout = send_msg->timeout; + send_context->direct_peer = direct; + send_context->distant_peer = destination; + send_context->message = message_buf; + send_context->message_size = message_size; + send_context->send_result = send_result_msg; +#if DEBUG_DV_MESSAGES + send_context->uid = send_msg->uid; +#endif + + if (send_message_via(&my_identity, direct, send_context) != GNUNET_YES) + { + send_result_msg->result = htons(1); + pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(struct GNUNET_DV_SendResultMessage)); + pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1]; + memcpy(&pending_message[1], send_result_msg, sizeof(struct GNUNET_DV_SendResultMessage)); + GNUNET_free(send_result_msg); + + GNUNET_CONTAINER_DLL_insert_after(plugin_pending_head, plugin_pending_tail, plugin_pending_tail, pending_message); + + if (client_handle != NULL) + { + if (plugin_transmit_handle == NULL) + { + plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle, + sizeof(struct GNUNET_DV_SendResultMessage), + GNUNET_TIME_UNIT_FOREVER_REL, + &transmit_to_plugin, NULL); + } + else + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failed to queue message for plugin, must be one in progress already!!\n"); + } + } + GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */ + dest_hash.encoding[4] = '\0'; + GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s DV SEND failed to send message to destination `%s' via `%s'\n", my_short_id, (const char *)&dest_hash.encoding, GNUNET_i2s(direct)); + } + + /* In bizarro world GNUNET_SYSERR indicates that we succeeded */ +#if UNSIMPLER + if (GNUNET_SYSERR != GNUNET_CONTAINER_multihashmap_get_multiple(extended_neighbors, &destination->hashPubKey, &send_iterator, send_context)) + { + send_result_msg->result = htons(1); + pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(struct GNUNET_DV_SendResultMessage)); + pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1]; + memcpy(&pending_message[1], send_result_msg, sizeof(struct GNUNET_DV_SendResultMessage)); + GNUNET_free(send_result_msg); + + GNUNET_CONTAINER_DLL_insert_after(plugin_pending_head, plugin_pending_tail, plugin_pending_tail, pending_message); + + if (client_handle != NULL) + { + if (plugin_transmit_handle == NULL) + { + plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle, + sizeof(struct GNUNET_DV_SendResultMessage), + GNUNET_TIME_UNIT_FOREVER_REL, + &transmit_to_plugin, NULL); + } + else + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failed to queue message for plugin, must be one in progress already!!\n"); + } + } + GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */ + dest_hash.encoding[4] = '\0'; + GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s DV SEND failed to send message to destination `%s' via `%s'\n", my_short_id, (const char *)&dest_hash.encoding, GNUNET_i2s(direct)); + } +#endif + GNUNET_free(message_buf); + GNUNET_free(send_context); + GNUNET_free(direct); + GNUNET_free(destination); + GNUNET_SERVER_receive_done(client, GNUNET_OK); } +/** Forward declarations **/ static int handle_dv_gossip_message (void *cls, const struct GNUNET_PeerIdentity *peer, const struct GNUNET_MessageHeader *message, - struct GNUNET_TIME_Relative latency, - uint32_t distance); + const struct GNUNET_TRANSPORT_ATS_Information *atsi); + +static int handle_dv_disconnect_message (void *cls, + const struct GNUNET_PeerIdentity *peer, + const struct GNUNET_MessageHeader *message, + const struct GNUNET_TRANSPORT_ATS_Information *atsi); +/** End forward declarations **/ + /** * List of handlers for the messages understood by this @@ -806,15 +1985,149 @@ static int handle_dv_gossip_message (void *cls, static struct GNUNET_CORE_MessageHandler core_handlers[] = { {&handle_dv_data_message, GNUNET_MESSAGE_TYPE_DV_DATA, 0}, {&handle_dv_gossip_message, GNUNET_MESSAGE_TYPE_DV_GOSSIP, 0}, + {&handle_dv_disconnect_message, GNUNET_MESSAGE_TYPE_DV_DISCONNECT, 0}, {NULL, 0, 0} }; - static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = { - {&send_dv_message, NULL, GNUNET_MESSAGE_TYPE_TRANSPORT_DV_SEND, 0}, + {&handle_dv_send_message, NULL, GNUNET_MESSAGE_TYPE_TRANSPORT_DV_SEND, 0}, + {&handle_start, NULL, GNUNET_MESSAGE_TYPE_DV_START, 0}, {NULL, NULL, 0, 0} }; +/** + * Free a DistantNeighbor node, including removing it + * from the referer's list. + */ +static void +distant_neighbor_free (struct DistantNeighbor *referee) +{ + struct DirectNeighbor *referrer; + + referrer = referee->referrer; + if (referrer != NULL) + { + GNUNET_CONTAINER_DLL_remove (referrer->referee_head, + referrer->referee_tail, referee); + } + GNUNET_CONTAINER_heap_remove_node (referee->max_loc); + GNUNET_CONTAINER_heap_remove_node (referee->min_loc); + GNUNET_CONTAINER_multihashmap_remove_all (extended_neighbors, + &referee->identity.hashPubKey); + GNUNET_free_non_null (referee->pkey); + GNUNET_free (referee); +} + +/** + * Free a DirectNeighbor node, including removing it + * from the referer's list. + */ +static void +direct_neighbor_free (struct DirectNeighbor *direct) +{ + struct NeighborSendContext *send_context; + struct FastGossipNeighborList *about_list; + struct FastGossipNeighborList *prev_about; + + send_context = direct->send_context; + + if (send_context->task != GNUNET_SCHEDULER_NO_TASK) + GNUNET_SCHEDULER_cancel(send_context->task); + + about_list = send_context->fast_gossip_list_head; + while (about_list != NULL) + { + GNUNET_CONTAINER_DLL_remove(send_context->fast_gossip_list_head, send_context->fast_gossip_list_tail, about_list); + prev_about = about_list; + about_list = about_list->next; + GNUNET_free(prev_about); + } + GNUNET_free(send_context); + GNUNET_free(direct); +} + +/** + * Multihashmap iterator for sending out disconnect messages + * for a peer. + * + * @param cls the peer that was disconnected + * @param key key value stored under + * @param value the direct neighbor to send disconnect to + * + * @return GNUNET_YES to continue iteration, GNUNET_NO to stop + */ +static int schedule_disconnect_messages (void *cls, + const GNUNET_HashCode * key, + void *value) +{ + struct DisconnectContext *disconnect_context = cls; + struct DirectNeighbor *disconnected = disconnect_context->direct; + struct DirectNeighbor *notify = value; + struct PendingMessage *pending_message; + p2p_dv_MESSAGE_Disconnect *disconnect_message; + + if (memcmp(¬ify->identity, &disconnected->identity, sizeof(struct GNUNET_PeerIdentity)) == 0) + return GNUNET_YES; /* Don't send disconnect message to peer that disconnected! */ + + pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(p2p_dv_MESSAGE_Disconnect)); + pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1]; + pending_message->importance = default_dv_priority; + pending_message->timeout = GNUNET_TIME_relative_get_forever(); + memcpy(&pending_message->recipient, ¬ify->identity, sizeof(struct GNUNET_PeerIdentity)); + pending_message->msg_size = sizeof(p2p_dv_MESSAGE_Disconnect); + disconnect_message = (p2p_dv_MESSAGE_Disconnect *)pending_message->msg; + disconnect_message->header.size = htons (sizeof (p2p_dv_MESSAGE_Disconnect)); + disconnect_message->header.type = htons (GNUNET_MESSAGE_TYPE_DV_DISCONNECT); + disconnect_message->peer_id = htonl(disconnect_context->distant->our_id); + + GNUNET_CONTAINER_DLL_insert_after (core_pending_head, + core_pending_tail, + core_pending_tail, + pending_message); + + GNUNET_SCHEDULER_add_now(try_core_send, NULL); + /*if (core_transmit_handle == NULL) + core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, GNUNET_YES, default_dv_priority, GNUNET_TIME_relative_get_forever(), ¬ify->identity, sizeof(p2p_dv_MESSAGE_Disconnect), &core_transmit_notify, NULL);*/ + + return GNUNET_YES; +} + +/** + * Multihashmap iterator for freeing extended neighbors. + * + * @param cls NULL + * @param key key value stored under + * @param value the distant neighbor to be freed + * + * @return GNUNET_YES to continue iteration, GNUNET_NO to stop + */ +static int free_extended_neighbors (void *cls, + const GNUNET_HashCode * key, + void *value) +{ + struct DistantNeighbor *distant = value; + distant_neighbor_free(distant); + return GNUNET_YES; +} + +/** + * Multihashmap iterator for freeing direct neighbors. + * + * @param cls NULL + * @param key key value stored under + * @param value the direct neighbor to be freed + * + * @return GNUNET_YES to continue iteration, GNUNET_NO to stop + */ +static int free_direct_neighbors (void *cls, + const GNUNET_HashCode * key, + void *value) +{ + struct DirectNeighbor *direct = value; + direct_neighbor_free(direct); + return GNUNET_YES; +} + /** * Task run during shutdown. @@ -826,7 +2139,26 @@ static void shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) { +#if DEBUG_DV + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "calling CORE_DISCONNECT\n"); + GNUNET_CONTAINER_multihashmap_iterate(extended_neighbors, &print_neighbors, NULL); +#endif + GNUNET_CONTAINER_multihashmap_iterate(extended_neighbors, &free_extended_neighbors, NULL); + GNUNET_CONTAINER_multihashmap_destroy(extended_neighbors); + GNUNET_CONTAINER_multihashmap_iterate(direct_neighbors, &free_direct_neighbors, NULL); + GNUNET_CONTAINER_multihashmap_destroy(direct_neighbors); + + GNUNET_CONTAINER_heap_destroy(neighbor_max_heap); + GNUNET_CONTAINER_heap_destroy(neighbor_min_heap); + GNUNET_CORE_disconnect (coreAPI); + coreAPI = NULL; + GNUNET_PEERINFO_disconnect(peerinfo_handle); + GNUNET_SERVER_mst_destroy(coreMST); + GNUNET_free_non_null(my_short_id); +#if DEBUG_DV + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "CORE_DISCONNECT completed\n"); +#endif } /** @@ -840,8 +2172,8 @@ void core_init (void *cls, if (server == NULL) { - GNUNET_SCHEDULER_cancel(sched, cleanup_task); - GNUNET_SCHEDULER_add_now(sched, &shutdown_task, NULL); + GNUNET_SCHEDULER_cancel(cleanup_task); + GNUNET_SCHEDULER_add_now(&shutdown_task, NULL); return; } #if DEBUG_DV @@ -849,10 +2181,39 @@ void core_init (void *cls, "%s: Core connection initialized, I am peer: %s\n", "dv", GNUNET_i2s(identity)); #endif memcpy(&my_identity, identity, sizeof(struct GNUNET_PeerIdentity)); + my_short_id = GNUNET_strdup(GNUNET_i2s(&my_identity)); coreAPI = server; } +#if PKEY_NO_NEIGHBOR_ON_ADD +/** + * Iterator over hash map entries. + * + * @param cls closure + * @param key current key code + * @param value value in the hash map + * @return GNUNET_YES if we should continue to + * iterate, + * GNUNET_NO if not. + */ +static int add_pkey_to_extended (void *cls, + const GNUNET_HashCode * key, + void *abs_value) +{ + struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pkey = cls; + struct DistantNeighbor *distant_neighbor = abs_value; + + if (distant_neighbor->pkey == NULL) + { + distant_neighbor->pkey = GNUNET_malloc(sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded)); + memcpy(distant_neighbor->pkey, pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded)); + } + + return GNUNET_YES; +} +#endif + /** * Iterator over hash map entries. * @@ -873,39 +2234,124 @@ static int update_matching_neighbors (void *cls, if (update_info->referrer == distant_neighbor->referrer) /* Direct neighbor matches, update it's info and return GNUNET_NO */ { /* same referrer, cost change! */ - GNUNET_CONTAINER_heap_update_cost (ctx.neighbor_max_heap, + GNUNET_CONTAINER_heap_update_cost (neighbor_max_heap, update_info->neighbor->max_loc, update_info->cost); - GNUNET_CONTAINER_heap_update_cost (ctx.neighbor_min_heap, + GNUNET_CONTAINER_heap_update_cost (neighbor_min_heap, update_info->neighbor->min_loc, update_info->cost); update_info->neighbor->last_activity = update_info->now; update_info->neighbor->cost = update_info->cost; + update_info->neighbor->referrer_id = update_info->referrer_peer_id; return GNUNET_NO; } return GNUNET_YES; } - + +/** + * Iterate over all current direct peers, add DISTANT newly connected + * peer to the fast gossip list for that peer so we get DV routing + * information out as fast as possible! + * + * @param cls the newly connected neighbor we will gossip about + * @param key the hashcode of the peer + * @param value the direct neighbor we should gossip to + * + * @return GNUNET_YES to continue iteration, GNUNET_NO otherwise + */ +static int add_distant_all_direct_neighbors (void *cls, + const GNUNET_HashCode * key, + void *value) +{ + struct DirectNeighbor *direct = (struct DirectNeighbor *)value; + struct DistantNeighbor *distant = (struct DistantNeighbor *)cls; + struct NeighborSendContext *send_context = direct->send_context; + struct FastGossipNeighborList *gossip_entry; +#if DEBUG_DV + char *encPeerAbout; + char *encPeerTo; +#endif + + if (distant == NULL) + { + return GNUNET_YES; + } + + if (memcmp(&direct->identity, &distant->identity, sizeof(struct GNUNET_PeerIdentity)) == 0) + { + return GNUNET_YES; /* Don't gossip to a peer about itself! */ + } + +#if SUPPORT_HIDING + if (distant->hidden == GNUNET_YES) + return GNUNET_YES; /* This peer should not be gossipped about (hidden) */ +#endif + gossip_entry = GNUNET_malloc(sizeof(struct FastGossipNeighborList)); + gossip_entry->about = distant; + + GNUNET_CONTAINER_DLL_insert_after(send_context->fast_gossip_list_head, + send_context->fast_gossip_list_tail, + send_context->fast_gossip_list_tail, + gossip_entry); +#if DEBUG_DV + encPeerAbout = GNUNET_strdup(GNUNET_i2s(&distant->identity)); + encPeerTo = GNUNET_strdup(GNUNET_i2s(&direct->identity)); + + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Fast send info about peer %s id %u for directly connected peer %s\n", + GNUNET_i2s(&my_identity), + encPeerAbout, distant->our_id, encPeerTo); + GNUNET_free(encPeerAbout); + GNUNET_free(encPeerTo); +#endif + /*if (send_context->task != GNUNET_SCHEDULER_NO_TASK) + GNUNET_SCHEDULER_cancel(send_context->task);*/ + + send_context->task = GNUNET_SCHEDULER_add_now(&neighbor_send_task, send_context); + return GNUNET_YES; +} + /** - * Free a DistantNeighbor node, including removing it - * from the referer's list. + * Callback for hello address creation. + * + * @param cls closure, a struct HelloContext + * @param max maximum number of bytes that can be written to buf + * @param buf where to write the address information + * + * @return number of bytes written, 0 to signal the + * end of the iteration. */ -static void -distant_neighbor_free (struct DistantNeighbor *referee) +static size_t +generate_hello_address (void *cls, size_t max, void *buf) { - struct DirectNeighbor *referrer; + struct HelloContext *hello_context = cls; + char *addr_buffer; + size_t offset; + size_t size; + size_t ret; - referrer = referee->referrer; - if (referrer != NULL) - { - GNUNET_CONTAINER_DLL_remove (referrer->referee_head, - referrer->referee_tail, referee); - } - GNUNET_CONTAINER_heap_remove_node (ctx.neighbor_max_heap, referee->max_loc); - GNUNET_CONTAINER_heap_remove_node (ctx.neighbor_min_heap, referee->min_loc); - GNUNET_CONTAINER_multihashmap_remove_all (ctx.extended_neighbors, - &referee->identity.hashPubKey); - GNUNET_free (referee); + if (hello_context->addresses_to_add == 0) + return 0; + + /* Hello "address" will be concatenation of distant peer and direct peer identities */ + size = 2 * sizeof(struct GNUNET_PeerIdentity); + GNUNET_assert(max >= size); + + addr_buffer = GNUNET_malloc(size); + offset = 0; + /* Copy the distant peer identity to buffer */ + memcpy(addr_buffer, &hello_context->distant_peer, sizeof(struct GNUNET_PeerIdentity)); + offset += sizeof(struct GNUNET_PeerIdentity); + /* Copy the direct peer identity to buffer */ + memcpy(&addr_buffer[offset], hello_context->direct_peer, sizeof(struct GNUNET_PeerIdentity)); + ret = GNUNET_HELLO_add_address ("dv", + GNUNET_TIME_relative_to_absolute + (GNUNET_TIME_UNIT_HOURS), addr_buffer, size, + buf, max); + + hello_context->addresses_to_add--; + + GNUNET_free(addr_buffer); + return ret; } @@ -915,12 +2361,17 @@ distant_neighbor_free (struct DistantNeighbor *referee) * needs to be updated. * * @param peer identity of the peer whose info is being added/updated + * @param pkey public key of the peer whose info is being added/updated * @param referrer_peer_id id to use when sending to 'peer' * @param referrer if this is a gossiped peer, who did we hear it from? * @param cost the cost of communicating with this peer via 'referrer' + * + * @return the added neighbor, the updated neighbor or NULL (neighbor + * not added) */ -static void +static struct DistantNeighbor * addUpdateNeighbor (const struct GNUNET_PeerIdentity * peer, + struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pkey, unsigned int referrer_peer_id, struct DirectNeighbor *referrer, unsigned int cost) { @@ -928,45 +2379,92 @@ addUpdateNeighbor (const struct GNUNET_PeerIdentity * peer, struct DistantNeighbor *max; struct GNUNET_TIME_Absolute now; struct NeighborUpdateInfo *neighbor_update; + struct HelloContext *hello_context; + struct GNUNET_HELLO_Message *hello_msg; unsigned int our_id; + char *addr1; + char *addr2; + int i; - now = GNUNET_TIME_absolute_get (); - our_id = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, RAND_MAX - 1) + 1; +#if DEBUG_DV_PEER_NUMBERS + char *encAbout; + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "%s Received sender id (%u)!\n", "DV SERVICE", referrer_peer_id); +#endif - neighbor = GNUNET_CONTAINER_multihashmap_get (ctx.extended_neighbors, + now = GNUNET_TIME_absolute_get (); + neighbor = GNUNET_CONTAINER_multihashmap_get (extended_neighbors, &peer->hashPubKey); neighbor_update = GNUNET_malloc(sizeof(struct NeighborUpdateInfo)); neighbor_update->neighbor = neighbor; neighbor_update->cost = cost; neighbor_update->now = now; neighbor_update->referrer = referrer; + neighbor_update->referrer_peer_id = referrer_peer_id; + + if (neighbor != NULL) + { +#if USE_PEER_ID + memcpy(&our_id, &neighbor->identity, sizeof(unsigned int)); +#else + our_id = neighbor->our_id; +#endif + } + else + { +#if USE_PEER_ID + memcpy(&our_id, peer, sizeof(unsigned int)); +#else + our_id = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, RAND_MAX - 1) + 1; +#endif + } /* Either we do not know this peer, or we already do but via a different immediate peer */ if ((neighbor == NULL) || - (GNUNET_CONTAINER_multihashmap_get_multiple(ctx.extended_neighbors, + (GNUNET_CONTAINER_multihashmap_get_multiple(extended_neighbors, &peer->hashPubKey, &update_matching_neighbors, neighbor_update) != GNUNET_SYSERR)) { + +#if AT_MOST_ONE + if ((neighbor != NULL) && (cost < neighbor->cost)) /* New cost is less than old, remove old */ + { + distant_neighbor_free(neighbor); + } + else if (neighbor != NULL) /* Only allow one DV connection to each peer */ + { + return NULL; + } +#endif /* new neighbor! */ - if (cost > ctx.fisheye_depth) + if (cost > fisheye_depth) { /* too costly */ GNUNET_free(neighbor_update); - return; + return NULL; } - if (ctx.max_table_size <= - GNUNET_CONTAINER_multihashmap_size (ctx.extended_neighbors)) + +#if DEBUG_DV_PEER_NUMBERS + encAbout = GNUNET_strdup(GNUNET_i2s(peer)); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "%s: %s Chose NEW id (%u) for peer %s!\n", GNUNET_i2s(&my_identity), "DV SERVICE", our_id, encAbout); + GNUNET_free(encAbout); +#endif + + if (max_table_size <= + GNUNET_CONTAINER_multihashmap_size (extended_neighbors)) { /* remove most expensive entry */ - max = GNUNET_CONTAINER_heap_peek (ctx.neighbor_max_heap); + max = GNUNET_CONTAINER_heap_peek (neighbor_max_heap); + GNUNET_assert(max != NULL); if (cost > max->cost) { /* new entry most expensive, don't create */ GNUNET_free(neighbor_update); - return; + return NULL; } - if (max->cost > 0) + if (max->cost > 1) { /* only free if this is not a direct connection; we could theoretically have more direct @@ -978,54 +2476,142 @@ addUpdateNeighbor (const struct GNUNET_PeerIdentity * peer, neighbor = GNUNET_malloc (sizeof (struct DistantNeighbor)); GNUNET_CONTAINER_DLL_insert (referrer->referee_head, referrer->referee_tail, neighbor); - neighbor->max_loc = GNUNET_CONTAINER_heap_insert (ctx.neighbor_max_heap, + neighbor->max_loc = GNUNET_CONTAINER_heap_insert (neighbor_max_heap, neighbor, cost); - neighbor->min_loc = GNUNET_CONTAINER_heap_insert (ctx.neighbor_min_heap, + neighbor->min_loc = GNUNET_CONTAINER_heap_insert (neighbor_min_heap, neighbor, cost); neighbor->referrer = referrer; memcpy (&neighbor->identity, peer, sizeof (struct GNUNET_PeerIdentity)); + if (pkey != NULL) /* pkey will be null on direct neighbor addition */ + { + neighbor->pkey = GNUNET_malloc(sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded)); + memcpy (neighbor->pkey, pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded)); + } + else + neighbor->pkey = pkey; + neighbor->last_activity = now; neighbor->cost = cost; neighbor->referrer_id = referrer_peer_id; neighbor->our_id = our_id; neighbor->hidden = - (cost == 0) ? (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 4) == + (cost == DIRECT_NEIGHBOR_COST) ? (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 4) == 0) : GNUNET_NO; - GNUNET_CONTAINER_multihashmap_put (ctx.extended_neighbors, &peer->hashPubKey, + + GNUNET_CONTAINER_multihashmap_put (extended_neighbors, &peer->hashPubKey, neighbor, GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE); + if (referrer_peer_id != 0) + { + for (i = 0; i< MAX_OUTSTANDING_MESSAGES; i++) + { + if (referrer->pending_messages[i].sender_id == referrer_peer_id) /* We have a queued message from just learned about peer! */ + { +#if DEBUG_DV_MESSAGES + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: learned about peer %llu from which we have a previous unknown message, processing!\n", my_short_id, referrer_peer_id); +#endif + struct GNUNET_TRANSPORT_ATS_Information atsi[3]; + atsi[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE); + atsi[0].value = htonl (referrer->pending_messages[i].distance); + atsi[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY); + atsi[1].value = htonl ((uint32_t)referrer->pending_messages[i].latency.rel_value); + atsi[2].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR); + atsi[2].value = htonl (0); + handle_dv_data_message(NULL, + &referrer->pending_messages[i].sender, + referrer->pending_messages[i].message, + (const struct GNUNET_TRANSPORT_ATS_Information *)&atsi); + GNUNET_free(referrer->pending_messages[i].message); + referrer->pending_messages[i].sender_id = 0; + } + } + } + if ((cost != DIRECT_NEIGHBOR_COST) && (neighbor->pkey != NULL)) + { + /* Added neighbor, now send HELLO to transport */ + hello_context = GNUNET_malloc(sizeof(struct HelloContext)); + hello_context->direct_peer = &referrer->identity; + memcpy(&hello_context->distant_peer, peer, sizeof(struct GNUNET_PeerIdentity)); + hello_context->addresses_to_add = 1; + hello_msg = GNUNET_HELLO_create(pkey, &generate_hello_address, hello_context); + GNUNET_assert(memcmp(hello_context->direct_peer, &hello_context->distant_peer, sizeof(struct GNUNET_PeerIdentity)) != 0); + addr1 = GNUNET_strdup(GNUNET_i2s(hello_context->direct_peer)); + addr2 = GNUNET_strdup(GNUNET_i2s(&hello_context->distant_peer)); +#if DEBUG_DV + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: GIVING HELLO size %d for %s via %s to TRANSPORT\n", my_short_id, GNUNET_HELLO_size(hello_msg), addr2, addr1); +#endif + GNUNET_free(addr1); + GNUNET_free(addr2); + send_to_plugin(hello_context->direct_peer, GNUNET_HELLO_get_header(hello_msg), GNUNET_HELLO_size(hello_msg), &hello_context->distant_peer, cost); + GNUNET_free(hello_context); + GNUNET_free(hello_msg); + } + } else { -#if DEBUG_DV +#if DEBUG_DV_GOSSIP GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s: Already know peer %s distance %d, referrer id %d!\n", "dv", GNUNET_i2s(peer), cost, referrer_peer_id); #endif } #if DEBUG_DV GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "%s: Size of extended_neighbors is %d\n", "dv", GNUNET_CONTAINER_multihashmap_size(ctx.extended_neighbors)); + "%s: Size of extended_neighbors is %d\n", "dv", GNUNET_CONTAINER_multihashmap_size(extended_neighbors)); #endif + GNUNET_free(neighbor_update); - /* Old logic to remove entry and replace, not needed now as we only want to remove when full - * or when the referring peer disconnects from us. - */ - /* - GNUNET_DLL_remove (neighbor->referrer->referee_head, - neighbor->referrer->referee_tail, neighbor); - neighbor->referrer = referrer; - GNUNET_DLL_insert (referrer->referee_head, - referrer->referee_tail, neighbor); - GNUNET_CONTAINER_heap_update_cost (ctx.neighbor_max_heap, - neighbor->max_loc, cost); - GNUNET_CONTAINER_heap_update_cost (ctx.neighbor_min_heap, - neighbor->min_loc, cost); - neighbor->referrer_id = referrer_peer_id; - neighbor->last_activity = now; - neighbor->cost = cost; - */ + return neighbor; +} + + +/** + * Core handler for dv disconnect messages. These will be used + * by us to tell transport via the dv plugin that a peer can + * no longer be contacted by us via a certain address. We should + * then propagate these messages on, given that the distance to + * the peer indicates we would have gossiped about it to others. + * + * @param cls closure + * @param peer peer which sent the message (immediate sender) + * @param message the message + * @param atsi performance data + */ +static int handle_dv_disconnect_message (void *cls, + const struct GNUNET_PeerIdentity *peer, + const struct GNUNET_MessageHeader *message, + const struct GNUNET_TRANSPORT_ATS_Information *atsi) +{ + struct DirectNeighbor *referrer; + struct DistantNeighbor *distant; + p2p_dv_MESSAGE_Disconnect *enc_message = (p2p_dv_MESSAGE_Disconnect *)message; + + if (ntohs (message->size) < sizeof (p2p_dv_MESSAGE_Disconnect)) + { + return GNUNET_SYSERR; /* invalid message */ + } + + referrer = GNUNET_CONTAINER_multihashmap_get (direct_neighbors, + &peer->hashPubKey); + if (referrer == NULL) + return GNUNET_OK; + + distant = referrer->referee_head; + while (distant != NULL) + { + if (distant->referrer_id == ntohl(enc_message->peer_id)) + { + distant_neighbor_free(distant); + distant = referrer->referee_head; + } + else + distant = distant->next; + } + + return GNUNET_OK; } + /** * Core handler for dv gossip messages. These will be used * by us to create a HELLO message for the newly peer containing @@ -1036,91 +2622,352 @@ addUpdateNeighbor (const struct GNUNET_PeerIdentity * peer, * @param cls closure * @param peer peer which sent the message (immediate sender) * @param message the message - * @param latency the latency of the connection we received the message from - * @param distance the distance to the immediate peer + * @param atsi performance data */ -static int handle_dv_gossip_message (void *cls, - const struct GNUNET_PeerIdentity *peer, - const struct GNUNET_MessageHeader *message, - struct GNUNET_TIME_Relative latency, - uint32_t distance) +static int +handle_dv_gossip_message (void *cls, + const struct GNUNET_PeerIdentity *peer, + const struct GNUNET_MessageHeader *message, + const struct GNUNET_TRANSPORT_ATS_Information *atsi) { -#if DEBUG_DV - char * encPeerAbout; - char * encPeerFrom; -#endif struct DirectNeighbor *referrer; p2p_dv_MESSAGE_NeighborInfo *enc_message = (p2p_dv_MESSAGE_NeighborInfo *)message; -#if DEBUG_DV + + if (ntohs (message->size) < sizeof (p2p_dv_MESSAGE_NeighborInfo)) + { + return GNUNET_SYSERR; /* invalid message */ + } + +#if DEBUG_DV_GOSSIP_RECEIPT + char * encPeerAbout; + char * encPeerFrom; + encPeerAbout = GNUNET_strdup(GNUNET_i2s(&enc_message->neighbor)); encPeerFrom = GNUNET_strdup(GNUNET_i2s(peer)); GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "%s: Receives %s message from peer %s about peer %s!\n", "dv", "DV GOSSIP", encPeerFrom, encPeerAbout); + "%s: Received %s message from peer %s about peer %s id %u distance %d!\n", GNUNET_i2s(&my_identity), "DV GOSSIP", encPeerFrom, encPeerAbout, ntohl(enc_message->neighbor_id), ntohl (enc_message->cost) + 1); GNUNET_free(encPeerAbout); GNUNET_free(encPeerFrom); #endif - if (ntohs (message->size) < sizeof (p2p_dv_MESSAGE_NeighborInfo)) - { - return GNUNET_SYSERR; /* invalid message */ - } - - referrer = GNUNET_CONTAINER_multihashmap_get (ctx.direct_neighbors, + referrer = GNUNET_CONTAINER_multihashmap_get (direct_neighbors, &peer->hashPubKey); if (referrer == NULL) return GNUNET_OK; - addUpdateNeighbor (&enc_message->neighbor, + addUpdateNeighbor (&enc_message->neighbor, &enc_message->pkey, ntohl (enc_message->neighbor_id), referrer, ntohl (enc_message->cost) + 1); return GNUNET_OK; } + +/** + * Iterate over all currently known peers, add them to the + * fast gossip list for this peer so we get DV routing information + * out as fast as possible! + * + * @param cls the direct neighbor we will gossip to + * @param key the hashcode of the peer + * @param value the distant neighbor we should add to the list + * + * @return GNUNET_YES to continue iteration, GNUNET_NO otherwise + */ +static int +add_all_extended_peers (void *cls, + const GNUNET_HashCode * key, + void *value) +{ + struct NeighborSendContext *send_context = (struct NeighborSendContext *)cls; + struct DistantNeighbor *distant = (struct DistantNeighbor *)value; + struct FastGossipNeighborList *gossip_entry; + + if (memcmp(&send_context->toNeighbor->identity, &distant->identity, sizeof(struct GNUNET_PeerIdentity)) == 0) + return GNUNET_YES; /* Don't gossip to a peer about itself! */ + +#if SUPPORT_HIDING + if (distant->hidden == GNUNET_YES) + return GNUNET_YES; /* This peer should not be gossipped about (hidden) */ +#endif + gossip_entry = GNUNET_malloc(sizeof(struct FastGossipNeighborList)); + gossip_entry->about = distant; + + GNUNET_CONTAINER_DLL_insert_after(send_context->fast_gossip_list_head, + send_context->fast_gossip_list_tail, + send_context->fast_gossip_list_tail, + gossip_entry); + + return GNUNET_YES; +} + +#if INSANE_GOSSIP +/** + * Iterator over hash map entries. + * + * @param cls closure + * @param key current key code + * @param value value in the hash map + * @return GNUNET_YES if we should continue to + * iterate, + * GNUNET_NO if not. + */ +static int +gossip_all_to_all_iterator (void *cls, + const GNUNET_HashCode * key, + void *abs_value) +{ + struct DirectNeighbor *direct = abs_value; + + GNUNET_CONTAINER_multihashmap_iterate (extended_neighbors, &add_all_extended_peers, direct->send_context); + + if (direct->send_context->task != GNUNET_SCHEDULER_NO_TASK) + GNUNET_SCHEDULER_cancel(direct->send_context->task); + + direct->send_context->task = GNUNET_SCHEDULER_add_now(&neighbor_send_task, direct->send_context); + return GNUNET_YES; +} + +/** + * Task run during shutdown. + * + * @param cls unused + * @param tc unused + */ +static void +gossip_all_to_all (void *cls, + const struct GNUNET_SCHEDULER_TaskContext *tc) +{ + GNUNET_CONTAINER_multihashmap_iterate (direct_neighbors, &gossip_all_to_all_iterator, NULL); + + GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 5), + &gossip_all_to_all, + NULL); + +} +#endif +/** + * Iterate over all current direct peers, add newly connected peer + * to the fast gossip list for that peer so we get DV routing + * information out as fast as possible! + * + * @param cls the newly connected neighbor we will gossip about + * @param key the hashcode of the peer + * @param value the direct neighbor we should gossip to + * + * @return GNUNET_YES to continue iteration, GNUNET_NO otherwise + */ +static int +add_all_direct_neighbors (void *cls, + const GNUNET_HashCode * key, + void *value) +{ + struct DirectNeighbor *direct = (struct DirectNeighbor *)value; + struct DirectNeighbor *to = (struct DirectNeighbor *)cls; + struct DistantNeighbor *distant; + struct NeighborSendContext *send_context = direct->send_context; + struct FastGossipNeighborList *gossip_entry; + char *direct_id; + + + distant = GNUNET_CONTAINER_multihashmap_get(extended_neighbors, &to->identity.hashPubKey); + if (distant == NULL) + { + return GNUNET_YES; + } + + if (memcmp(&direct->identity, &to->identity, sizeof(struct GNUNET_PeerIdentity)) == 0) + { + return GNUNET_YES; /* Don't gossip to a peer about itself! */ + } + +#if SUPPORT_HIDING + if (distant->hidden == GNUNET_YES) + return GNUNET_YES; /* This peer should not be gossipped about (hidden) */ +#endif + direct_id = GNUNET_strdup(GNUNET_i2s(&direct->identity)); +#if DEBUG_DV_GOSSIP + GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: adding peer %s to fast send list for %s\n", my_short_id, GNUNET_i2s(&distant->identity), direct_id); +#endif + GNUNET_free(direct_id); + gossip_entry = GNUNET_malloc(sizeof(struct FastGossipNeighborList)); + gossip_entry->about = distant; + + GNUNET_CONTAINER_DLL_insert_after(send_context->fast_gossip_list_head, + send_context->fast_gossip_list_tail, + send_context->fast_gossip_list_tail, + gossip_entry); + if (send_context->task != GNUNET_SCHEDULER_NO_TASK) + GNUNET_SCHEDULER_cancel(send_context->task); + + send_context->task = GNUNET_SCHEDULER_add_now(&neighbor_send_task, send_context); + //tc.reason = GNUNET_SCHEDULER_REASON_TIMEOUT; + //neighbor_send_task(send_context, &tc); + return GNUNET_YES; +} + +/** + * Type of an iterator over the hosts. Note that each + * host will be called with each available protocol. + * + * @param cls closure + * @param peer id of the peer, NULL for last call + * @param hello hello message for the peer (can be NULL) + * @param err_msg NULL if successful, otherwise contains error message + */ +static void +process_peerinfo (void *cls, + const struct GNUNET_PeerIdentity *peer, + const struct GNUNET_HELLO_Message *hello, + const char *err_msg) +{ + struct PeerIteratorContext *peerinfo_iterator = cls; + struct DirectNeighbor *neighbor = peerinfo_iterator->neighbor; + struct DistantNeighbor *distant = peerinfo_iterator->distant; +#if DEBUG_DV_PEER_NUMBERS + char *neighbor_pid; +#endif + int sent; + if (err_msg != NULL) + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + _("Error in communication with PEERINFO service\n")); + /* return; */ + } + if (peer == NULL) + { + if (distant->pkey == NULL) + { +#if DEBUG_DV + GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Failed to get peerinfo information for this peer, retrying!\n"); +#endif + peerinfo_iterator->ic = GNUNET_PEERINFO_iterate(peerinfo_handle, + &peerinfo_iterator->neighbor->identity, + GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 3), + &process_peerinfo, + peerinfo_iterator); + } + else + { + GNUNET_free(peerinfo_iterator); + } + return; + } + + if (memcmp(&neighbor->identity, peer, sizeof(struct GNUNET_PeerIdentity) != 0)) + return; + + if ((hello != NULL) && (GNUNET_HELLO_get_key (hello, &neighbor->pkey) == GNUNET_OK)) + { + if (distant->pkey == NULL) + { + distant->pkey = GNUNET_malloc(sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded)); + memcpy(distant->pkey, &neighbor->pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded)); + } + + sent = GNUNET_CONTAINER_multihashmap_iterate (extended_neighbors, &add_all_extended_peers, neighbor->send_context); + if (stats != NULL) + { + GNUNET_STATISTICS_update (stats, "# distant peers gossiped to direct neighbors", sent, GNUNET_NO); + } +#if DEBUG_DV_PEER_NUMBERS + neighbor_pid = GNUNET_strdup(GNUNET_i2s(&neighbor->identity)); + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Gossipped %d extended peers to %s\n", GNUNET_i2s(&my_identity), sent, neighbor_pid); +#endif + sent = GNUNET_CONTAINER_multihashmap_iterate (direct_neighbors, &add_all_direct_neighbors, neighbor); + if (stats != NULL) + { + GNUNET_STATISTICS_update (stats, "# direct peers gossiped to direct neighbors", sent, GNUNET_NO); + } +#if DEBUG_DV_PEER_NUMBERS + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Gossipped about %s to %d direct peers\n", GNUNET_i2s(&my_identity), neighbor_pid, sent); + GNUNET_free(neighbor_pid); +#endif + neighbor->send_context->task = GNUNET_SCHEDULER_add_now(&neighbor_send_task, neighbor->send_context); + } +} + + /** * Method called whenever a peer connects. * * @param cls closure * @param peer peer identity this notification is about - * @param latency reported latency of the connection with peer - * @param distance reported distance (DV) to peer + * @param atsi performance data */ -void handle_core_connect (void *cls, - const struct GNUNET_PeerIdentity * peer, - struct GNUNET_TIME_Relative latency, - uint32_t distance) +static void +handle_core_connect (void *cls, + const struct GNUNET_PeerIdentity * peer, + const struct GNUNET_TRANSPORT_ATS_Information *atsi) { struct DirectNeighbor *neighbor; + struct DistantNeighbor *about; + struct PeerIteratorContext *peerinfo_iterator; + int sent; #if DEBUG_DV GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s: Receives core connect message for peer %s distance %d!\n", "dv", GNUNET_i2s(peer), distance); #endif + uint32_t distance; + + /* Check for connect to self message */ + if (0 == memcmp(&my_identity, peer, sizeof(struct GNUNET_PeerIdentity))) + return; - if ((distance == 0) && (GNUNET_CONTAINER_multihashmap_get(ctx.direct_neighbors, &peer->hashPubKey) == NULL)) + distance = get_atsi_distance (atsi); + if ((distance == DIRECT_NEIGHBOR_COST) && + (GNUNET_CONTAINER_multihashmap_get(direct_neighbors, &peer->hashPubKey) == NULL)) { + peerinfo_iterator = GNUNET_malloc(sizeof(struct PeerIteratorContext)); neighbor = GNUNET_malloc (sizeof (struct DirectNeighbor)); neighbor->send_context = GNUNET_malloc(sizeof(struct NeighborSendContext)); neighbor->send_context->toNeighbor = neighbor; - neighbor->send_context->timeout = default_dv_delay; /* FIXME: base this on total gossip tasks, or bandwidth */ memcpy (&neighbor->identity, peer, sizeof (struct GNUNET_PeerIdentity)); - GNUNET_CONTAINER_multihashmap_put (ctx.direct_neighbors, + + GNUNET_assert(GNUNET_SYSERR != GNUNET_CONTAINER_multihashmap_put (direct_neighbors, &peer->hashPubKey, - neighbor, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY); - addUpdateNeighbor (peer, 0, neighbor, 0); - neighbor->send_context->task = GNUNET_SCHEDULER_add_now(sched, &neighbor_send_task, neighbor->send_context); + neighbor, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY)); + about = addUpdateNeighbor (peer, NULL, 0, neighbor, DIRECT_NEIGHBOR_COST); + peerinfo_iterator->distant = about; + peerinfo_iterator->neighbor = neighbor; + peerinfo_iterator->ic = GNUNET_PEERINFO_iterate (peerinfo_handle, + peer, + GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 3), + &process_peerinfo, + peerinfo_iterator); + + if ((about != NULL) && (about->pkey == NULL)) + { +#if DEBUG_DV + GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Newly added peer %s has NULL pkey!\n", GNUNET_i2s(peer)); +#endif + } + else if (about != NULL) + { + GNUNET_free(peerinfo_iterator); + } } else { + about = GNUNET_CONTAINER_multihashmap_get(extended_neighbors, &peer->hashPubKey); + if ((GNUNET_CONTAINER_multihashmap_get(direct_neighbors, &peer->hashPubKey) == NULL) && (about != NULL)) + { + sent = GNUNET_CONTAINER_multihashmap_iterate(direct_neighbors, &add_distant_all_direct_neighbors, about); + if (stats != NULL) + { + GNUNET_STATISTICS_update (stats, "# direct peers gossiped to new direct neighbors", sent, GNUNET_NO); + } + } #if DEBUG_DV - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "%s: Distance (%d) greater than 0 or already know about peer (%s), not re-adding!\n", "dv", distance, GNUNET_i2s(peer)); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "%s: Distance (%d) greater than %d or already know about peer (%s), not re-adding!\n", "dv", distance, DIRECT_NEIGHBOR_COST, GNUNET_i2s(peer)); #endif return; } } /** - * Method called whenever a given peer either connects. + * Method called whenever a given peer disconnects. * * @param cls closure * @param peer peer identity this notification is about @@ -1130,25 +2977,63 @@ void handle_core_disconnect (void *cls, { struct DirectNeighbor *neighbor; struct DistantNeighbor *referee; + struct FindDestinationContext fdc; + struct DisconnectContext disconnect_context; + struct PendingMessage *pending_pos; #if DEBUG_DV GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s: Receives core peer disconnect message!\n", "dv"); #endif + /* Check for disconnect from self message */ + if (0 == memcmp(&my_identity, peer, sizeof(struct GNUNET_PeerIdentity))) + return; + neighbor = - GNUNET_CONTAINER_multihashmap_get (ctx.direct_neighbors, &peer->hashPubKey); + GNUNET_CONTAINER_multihashmap_get (direct_neighbors, &peer->hashPubKey); + if (neighbor == NULL) { return; } + + pending_pos = core_pending_head; + while (NULL != pending_pos) + { + if (0 == memcmp(&pending_pos->recipient, &neighbor->identity, sizeof(struct GNUNET_PeerIdentity))) + { + GNUNET_CONTAINER_DLL_remove(core_pending_head, core_pending_tail, pending_pos); + pending_pos = core_pending_head; + } + else + pending_pos = pending_pos->next; + } + while (NULL != (referee = neighbor->referee_head)) distant_neighbor_free (referee); + + fdc.dest = NULL; + fdc.tid = 0; + + GNUNET_CONTAINER_multihashmap_iterate (extended_neighbors, &find_distant_peer, &fdc); + + if (fdc.dest != NULL) + { + disconnect_context.direct = neighbor; + disconnect_context.distant = fdc.dest; + GNUNET_CONTAINER_multihashmap_iterate (direct_neighbors, &schedule_disconnect_messages, &disconnect_context); + } + GNUNET_assert (neighbor->referee_tail == NULL); - GNUNET_CONTAINER_multihashmap_remove (ctx.direct_neighbors, - &peer->hashPubKey, neighbor); - if ((neighbor->send_context != NULL) && (neighbor->send_context->task != GNUNET_SCHEDULER_NO_TASK)) - GNUNET_SCHEDULER_cancel(sched, neighbor->send_context->task); + if (GNUNET_NO == GNUNET_CONTAINER_multihashmap_remove (direct_neighbors, + &peer->hashPubKey, neighbor)) + { + GNUNET_break(0); + } + if ((neighbor->send_context != NULL) && + (neighbor->send_context->task != GNUNET_SCHEDULER_NO_TASK)) + GNUNET_SCHEDULER_cancel(neighbor->send_context->task); GNUNET_free (neighbor); } @@ -1157,48 +3042,50 @@ void handle_core_disconnect (void *cls, * Process dv requests. * * @param cls closure - * @param scheduler scheduler to use * @param server the initialized server * @param c configuration to use */ static void run (void *cls, - struct GNUNET_SCHEDULER_Handle *scheduler, struct GNUNET_SERVER_Handle *server, const struct GNUNET_CONFIGURATION_Handle *c) { - struct GNUNET_TIME_Relative timeout; unsigned long long max_hosts; - timeout = GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 5); - sched = scheduler; cfg = c; /* FIXME: Read from config, or calculate, or something other than this! */ - max_hosts = 50; - ctx.max_table_size = 100; - ctx.fisheye_depth = 3; + max_hosts = DEFAULT_DIRECT_CONNECTIONS; + max_table_size = DEFAULT_DV_SIZE; + fisheye_depth = DEFAULT_FISHEYE_DEPTH; - ctx.neighbor_min_heap = + if (GNUNET_CONFIGURATION_have_value(cfg, "dv", "max_direct_connections")) + GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "dv", "max_direct_connections", &max_hosts)); + + if (GNUNET_CONFIGURATION_have_value(cfg, "dv", "max_total_connections")) + GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "dv", "max_total_connections", &max_table_size)); + + + if (GNUNET_CONFIGURATION_have_value(cfg, "dv", "fisheye_depth")) + GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "dv", "fisheye_depth", &fisheye_depth)); + + neighbor_min_heap = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN); - ctx.neighbor_max_heap = + neighbor_max_heap = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MAX); - ctx.direct_neighbors = GNUNET_CONTAINER_multihashmap_create (max_hosts); - ctx.extended_neighbors = - GNUNET_CONTAINER_multihashmap_create (ctx.max_table_size * 3); + direct_neighbors = GNUNET_CONTAINER_multihashmap_create (max_hosts); + extended_neighbors = + GNUNET_CONTAINER_multihashmap_create (max_table_size * 3); - client_transmit_timeout = GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 5); - default_dv_delay = GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 5); GNUNET_SERVER_add_handlers (server, plugin_handlers); coreAPI = - GNUNET_CORE_connect (sched, - cfg, - timeout, + GNUNET_CORE_connect (cfg, + 1, NULL, /* FIXME: anything we want to pass around? */ &core_init, - NULL, /* Don't care about pre-connects */ &handle_core_connect, &handle_core_disconnect, + NULL, NULL, GNUNET_NO, NULL, @@ -1207,13 +3094,22 @@ run (void *cls, if (coreAPI == NULL) return; - /* load (server); Huh? */ + + coreMST = GNUNET_SERVER_mst_create (&tokenized_message_handler, + NULL); + + peerinfo_handle = GNUNET_PEERINFO_connect(cfg); + + if (peerinfo_handle == NULL) + { + GNUNET_CORE_disconnect(coreAPI); + return; + } /* Scheduled the task to clean up when shutdown is called */ - cleanup_task = GNUNET_SCHEDULER_add_delayed (sched, - GNUNET_TIME_UNIT_FOREVER_REL, - &shutdown_task, - NULL); + cleanup_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, + &shutdown_task, + NULL); }