/*
This file is part of GNUnet.
- (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Christian Grothoff (and other contributing authors)
+ (C) 2003--2012 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 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
#include "gnunet_constants.h"
#include "gnunet_datastore_service.h"
+#include "gnunet_dht_service.h"
#include "gnunet_fs_service.h"
-
-/**
- * Size of the individual blocks used for file-sharing.
- */
-#define DBLOCK_SIZE (32*1024)
-
-/**
- * Maximum legal size for a kblock.
- */
-#define MAX_KBLOCK_SIZE (60 * 1024)
-
-/**
- * Maximum legal size for an sblock.
- */
-#define MAX_SBLOCK_SIZE (60 * 1024)
-
-/**
- * Maximum legal size for an nblock.
- */
-#define MAX_NBLOCK_SIZE (60 * 1024)
-
-/**
- * Pick a multiple of 2 here to achive 8-byte alignment!
- * We also probably want DBlocks to have (roughly) the
- * same size as IBlocks. With SHA-512, the optimal
- * value is 32768 byte / 128 byte = 256
- * (128 byte = 2 * 512 bits). DO NOT CHANGE!
- */
-#define CHK_PER_INODE 256
-
-
-/**
- * Maximum size for a file to be considered for
- * inlining in a directory.
- */
-#define MAX_INLINE_SIZE 65536
-
-
-/**
- * Blocksize to use when hashing files
- * for indexing (blocksize for IO, not for
- * the DBlocks). Larger blocksizes can
- * be more efficient but will be more disruptive
- * as far as the scheduler is concerned.
- */
-#define HASHING_BLOCKSIZE (1024 * 1024)
-
-/**
- * Number of bits we set per entry in the bloomfilter.
- * Do not change!
- */
-#define BLOOMFILTER_K 16
-
-/**
- * By how much (in ms) do we decrement the TTL
- * at each hop?
- */
-#define TTL_DECREMENT 5000
-
-/**
- * Length of the P2P success tracker. Note that
- * having a very long list can also hurt performance.
- */
-#define P2P_SUCCESS_LIST_SIZE 8
-
-
-/**
- * Length of the CS-2-P success tracker. Note that
- * having a very long list can also hurt performance.
- */
-#define CS2P_SUCCESS_LIST_SIZE 8
-
-/**
- * How long are we willing to wait for the datastore to be ready to
- * process a request for a query without priority?
- */
-#define BASIC_DATASTORE_REQUEST_DELAY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5)
-
-
-/**
- * How long are we willing to wait for the core to be ready to
- * transmit a reply to the target peer (if we can not transmit
- * until then, we will discard the reply).
- */
-#define ACCEPTABLE_REPLY_DELAY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 5)
-
-
-/**
- * Bandwidth value of an (effectively) 0-priority query.
- */
-#define QUERY_BANDWIDTH_VALUE 0.001
-
-/**
- * Bandwidth value of a 0-priority content (must be
- * fairly high compared to query since content is
- * typically significantly larger -- and more valueable
- * since it can take many queries to get one piece of
- * content).
- */
-#define CONTENT_BANDWIDTH_VALUE 0.8
-
-/**
- * By which amount do we decrement the TTL for simple forwarding /
- * indirection of the query; in milli-seconds. Set somewhat in
- * accordance to your network latency (above the time it'll take you
- * to send a packet and get a reply).
- */
-#define TTL_DECREMENT 5000
-
-/**
- * Until which load do we consider the peer idle and do not
- * charge at all? (should be larger than GNUNET_IDLE_LOAD_THRESHOLD used
- * by the rest of the code)!
- */
-#define IDLE_LOAD_THRESHOLD ((100 + GNUNET_CONSTANTS_IDLE_LOAD_THRESHOLD) / 2)
-
-
-
-/**
- * @brief content hash key
- */
-struct ContentHashKey
-{
- GNUNET_HashCode key;
- GNUNET_HashCode query;
-};
-
-
-/**
- * @brief complete information needed
- * to download a file.
- */
-struct FileIdentifier
-{
-
- /**
- * Total size of the file in bytes. (network byte order (!))
- */
- uint64_t file_length;
-
- /**
- * Query and key of the top GNUNET_EC_IBlock.
- */
- struct ContentHashKey chk;
-
-};
-
-
-/**
- * Information about a file and its location
- * (peer claiming to share the file).
- */
-struct Location
-{
- /**
- * Information about the shared file.
- */
- struct FileIdentifier fi;
-
- /**
- * Identity of the peer sharing the file.
- */
- struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded peer;
-
- /**
- * Time when this location URI expires.
- */
- struct GNUNET_TIME_Absolute expirationTime;
-
- /**
- * RSA signature over the GNUNET_EC_FileIdentifier,
- * GNUNET_hash of the peer and expiration time.
- */
- struct GNUNET_CRYPTO_RsaSignature contentSignature;
-
-};
-
-enum uri_types
-{ chk, sks, ksk, loc };
-
-/**
- * A Universal Resource Identifier (URI), opaque.
- */
-struct GNUNET_FS_Uri
-{
- enum uri_types type;
- union
- {
- struct
- {
- /**
- * Keywords start with a '+' if they are
- * mandatory (in which case the '+' is NOT
- * part of the keyword) and with a
- * simple space if they are optional
- * (in which case the space is ALSO not
- * part of the actual keyword).
- *
- * Double-quotes to protect spaces and
- * %-encoding are NOT used internally
- * (only in URI-strings).
- */
- char **keywords;
-
- /**
- * Size of the keywords array.
- */
- unsigned int keywordCount;
- } ksk;
-
- struct
- {
- /**
- * Hash of the public key for the namespace.
- */
- GNUNET_HashCode namespace;
-
- /**
- * Human-readable identifier chosen for this
- * entry in the namespace.
- */
- char *identifier;
- } sks;
-
- /**
- * Information needed to retrieve a file (content-hash-key
- * plus file size).
- */
- struct FileIdentifier chk;
-
- /**
- * Information needed to retrieve a file including signed
- * location (identity of a peer) of the content.
- */
- struct Location loc;
- } data;
-
-};
-
-
-/**
- * Information for a file or directory that is
- * about to be published.
- */
-struct GNUNET_FS_FileInformation
-{
-
- /**
- * Files in a directory are kept as a linked list.
- */
- struct GNUNET_FS_FileInformation *next;
-
- /**
- * If this is a file in a directory, "dir" refers to
- * the directory; otherwise NULL.
- */
- struct GNUNET_FS_FileInformation *dir;
-
- /**
- * Pointer kept for the client.
- */
- void *client_info;
-
- /**
- * Metadata to use for the file.
- */
- struct GNUNET_CONTAINER_MetaData *meta;
-
- /**
- * Keywords to use for KBlocks.
- */
- struct GNUNET_FS_Uri *keywords;
-
- /**
- * CHK for this file or directory. NULL if
- * we have not yet computed it.
- */
- struct GNUNET_FS_Uri *chk_uri;
-
- /**
- * At what time should the content expire?
- */
- struct GNUNET_TIME_Absolute expirationTime;
-
- /**
- * At what time did we start this upload?
- */
- struct GNUNET_TIME_Absolute start_time;
-
- /**
- * Under what filename is this struct serialized
- * (for operational persistence).
- */
- char *serialization;
-
- /**
- * Encoder being used to publish this file.
- */
- struct GNUNET_FS_TreeEncoder *te;
-
- /**
- * Error message (non-NULL if this operation
- * failed).
- */
- char *emsg;
-
- /**
- * Data describing either the file or the directory.
- */
- union
- {
-
- /**
- * Data for a file.
- */
- struct {
-
- /**
- * Function that can be used to read the data for the file.
- */
- GNUNET_FS_DataReader reader;
-
- /**
- * Closure for reader.
- */
- void *reader_cls;
-
- /**
- * Name of the file (must be an absolute path).
- * Only required for indexing. FIXME: not yet
- * initialized!
- */
- char *filename;
-
- /**
- * If this file is being indexed, this value
- * is set to the hash over the entire file
- * (when the indexing process is started).
- * Otherwise this field is not used.
- */
- GNUNET_HashCode file_id;
-
- /**
- * Size of the file (in bytes).
- */
- uint64_t file_size;
-
- /**
- * Should the file be indexed or inserted?
- */
- int do_index;
-
- /**
- * Is "file_id" already valid? Set to GNUNET_YES
- * once the hash has been calculated.
- */
- int have_hash;
-
- /**
- * Has the service confirmed our INDEX_START request?
- * GNUNET_YES if this step has been completed.
- */
- int index_start_confirmed;
-
- } file;
-
- /**
- * Data for a directory.
- */
- struct {
-
- /**
- * Name of the directory.
- */
- char *dirname;
-
- /**
- * Linked list of entries in the directory.
- */
- struct GNUNET_FS_FileInformation *entries;
-
- /**
- * Size of the directory itself (in bytes); 0 if the
- * size has not yet been calculated.
- */
- size_t dir_size;
-
- /**
- * Pointer to the data for the directory (or NULL if not
- * available).
- */
- void *dir_data;
-
- } dir;
-
- } data;
-
- /**
- * Is this struct for a file or directory?
- */
- int is_directory;
-
- /**
- * Desired anonymity level.
- */
- uint32_t anonymity;
-
- /**
- * Desired priority (for keeping the content in the DB).
- */
- uint32_t priority;
-
-};
-
-
-/**
- * Master context for most FS operations.
- */
-struct GNUNET_FS_Handle
-{
- /**
- * Scheduler.
- */
- struct GNUNET_SCHEDULER_Handle *sched;
-
- /**
- * Configuration to use.
- */
- const struct GNUNET_CONFIGURATION_Handle *cfg;
-
- /**
- * Name of our client.
- */
- char *client_name;
-
- /**
- * Function to call with updates on our progress.
- */
- GNUNET_FS_ProgressCallback upcb;
-
- /**
- * Closure for upcb.
- */
- void *upcb_cls;
-
- /**
- * Connection to the FS service.
- */
- struct GNUNET_CLIENT_Connection *client;
-
- /**
- * How many downloads probing availability
- * of search results do we have running
- * right now?
- */
- unsigned int active_probes;
-
- /**
- * General flags.
- */
- enum GNUNET_FS_Flags flags;
-
-};
-
-
-/**
- * Handle for controlling an upload.
- */
-struct GNUNET_FS_PublishContext
-{
- /**
- * Handle to the global fs context.
- */
- struct GNUNET_FS_Handle *h;
-
- /**
- * File-structure that is being shared.
- */
- struct GNUNET_FS_FileInformation *fi;
-
- /**
- * Namespace that we are publishing in, NULL if we have no namespace.
- */
- struct GNUNET_FS_Namespace *namespace;
-
- /**
- * ID of the content in the namespace, NULL if we have no namespace.
- */
- char *nid;
-
- /**
- * ID for future updates, NULL if we have no namespace or no updates.
- */
- char *nuid;
-
- /**
- * Our own client handle for the FS service;
- * only briefly used when we start to index a
- * file, otherwise NULL.
- */
- struct GNUNET_CLIENT_Connection *client;
-
- /**
- * Current position in the file-tree for the
- * upload.
- */
- struct GNUNET_FS_FileInformation *fi_pos;
-
- /**
- * Connection to the datastore service.
- */
- struct GNUNET_DATASTORE_Handle *dsh;
-
- /**
- * ID of the task performing the upload. NO_TASK
- * if the upload has completed.
- */
- GNUNET_SCHEDULER_TaskIdentifier upload_task;
-
- /**
- * Typically GNUNET_NO. Set to GNUNET_YES if
- * "upload_task" is GNUNET_SCHEDULER_NO_TASK
- * and we're waiting for a response from the
- * datastore service (in which case this
- * struct must not be freed until we have that
- * response). If someone tries to stop the
- * download for good during this period,
- * "in_network_wait" is set to GNUNET_SYSERR
- * which will cause the struct to be destroyed
- * right after we have the reply (or timeout)
- * from the datastore service.
- */
- int in_network_wait;
-
- /**
- * Options for publishing.
- */
- enum GNUNET_FS_PublishOptions options;
-
- /**
- * Space reservation ID with datastore service
- * for this upload.
- */
- int rid;
-
- /**
- * Set to GNUNET_YES if all processing has completed.
- */
- int all_done;
-};
-
-
-/**
- * Phases of unindex processing (state machine).
- */
-enum UnindexState
- {
- /**
- * We're currently hashing the file.
- */
- UNINDEX_STATE_HASHING = 0,
-
- /**
- * We're notifying the FS service about
- * the unindexing.
- */
- UNINDEX_STATE_FS_NOTIFY = 1,
-
- /**
- * We're telling the datastore to delete
- * the respective entries.
- */
- UNINDEX_STATE_DS_REMOVE = 2,
-
- /**
- * We're done.
- */
- UNINDEX_STATE_COMPLETE = 3,
-
- /**
- * We've encountered a fatal error.
- */
- UNINDEX_STATE_ERROR = 4,
-
- /**
- * We've been aborted. The next callback should clean up the
- * struct.
- */
- UNINDEX_STATE_ABORTED = 5
- };
-
-
-/**
- * Handle for controlling an unindexing operation.
- */
-struct GNUNET_FS_UnindexContext
-{
-
- /**
- * Global FS context.
- */
- struct GNUNET_FS_Handle *h;
-
- /**
- * Name of the file that we are unindexing.
- */
- char *filename;
-
- /**
- * Connection to the FS service,
- * only valid during the UNINDEX_STATE_FS_NOTIFY
- * phase.
- */
- struct GNUNET_CLIENT_Connection *client;
-
- /**
- * Connection to the datastore service,
- * only valid during the UNINDEX_STATE_DS_NOTIFY
- * phase.
- */
- struct GNUNET_DATASTORE_Handle *dsh;
-
- /**
- * Pointer kept for the client.
- */
- void *client_info;
-
- /**
- * Merkle-ish tree encoder context.
- */
- struct GNUNET_FS_TreeEncoder *tc;
-
- /**
- * Handle used to read the file.
- */
- struct GNUNET_DISK_FileHandle *fh;
-
- /**
- * Overall size of the file.
- */
- uint64_t file_size;
-
- /**
- * When did we start?
- */
- struct GNUNET_TIME_Absolute start_time;
-
- /**
- * Hash of the file's contents (once
- * computed).
- */
- GNUNET_HashCode file_id;
-
- /**
- * Current operatinonal phase.
- */
- enum UnindexState state;
-
-};
-
-
-/**
- * Information we store for each search result.
- */
-struct SearchResult
-{
-
- /**
- * URI to which this search result
- * refers to.
- */
- struct GNUNET_FS_Uri *uri;
-
- /**
- * Metadata for the search result.
- */
- struct GNUNET_CONTAINER_MetaData *meta;
-
- /**
- * Client info for this search result.
- */
- void *client_info;
-
- /**
- * ID of a job that is currently probing
- * this results' availability (NULL if we
- * are not currently probing).
- */
- struct GNUNET_FS_DownloadContext *probe_ctx;
-
- /**
- * ID of the task that will clean up the probe_ctx
- * should it not complete on time (and that will
- * need to be cancelled if we clean up the search
- * result before then).
- */
- GNUNET_SCHEDULER_TaskIdentifier probe_cancel_task;
-
- /**
- * Number of mandatory keywords for which
- * we have NOT yet found the search result;
- * when this value hits zero, the search
- * result is given to the callback.
- */
- uint32_t mandatory_missing;
-
- /**
- * Number of optional keywords under which
- * this result was also found.
- */
- uint32_t optional_support;
-
- /**
- * Number of availability tests that
- * have succeeded for this result.
- */
- uint32_t availability_success;
-
- /**
- * Number of availability trials that we
- * have performed for this search result.
- */
- uint32_t availability_trials;
-
-};
-
-
-/**
- * Information we keep for each keyword in
- * a keyword search.
- */
-struct SearchRequestEntry
-{
- /**
- * Hash of the original keyword, also known as the
- * key (for decrypting the KBlock).
- */
- GNUNET_HashCode key;
-
- /**
- * Hash of the public key, also known as the query.
- */
- GNUNET_HashCode query;
-
- /**
- * Map that contains a "struct SearchResult" for each result that
- * was found under this keyword. Note that the entries will point
- * to the same locations as those in the master result map (in
- * "struct GNUNET_FS_SearchContext"), so they should not be freed.
- * The key for each entry is the XOR of the key and query in the CHK
- * URI (as a unique identifier for the search result).
- */
- struct GNUNET_CONTAINER_MultiHashMap *results;
-
- /**
- * Is this keyword a mandatory keyword
- * (started with '+')?
- */
- int mandatory;
-
-};
-
-
-/**
- * Handle for controlling a search.
- */
-struct GNUNET_FS_SearchContext
-{
- /**
- * Handle to the global FS context.
- */
- struct GNUNET_FS_Handle *h;
-
- /**
- * List of keywords that we're looking for.
- */
- struct GNUNET_FS_Uri *uri;
-
- /**
- * For update-searches, link to the
- * base-SKS search that triggered the
- * update search; otherwise NULL.
- */
- struct GNUNET_FS_SearchContext *parent;
-
- /**
- * For update-searches, link to the
- * first child search that triggered the
- * update search; otherwise NULL.
- */
- struct GNUNET_FS_SearchContext *child_head;
-
- /**
- * For update-searches, link to the
- * last child search that triggered the
- * update search; otherwise NULL.
- */
- struct GNUNET_FS_SearchContext *child_tail;
-
- /**
- * For update-searches, link to the
- * next child belonging to the same parent.
- */
- struct GNUNET_FS_SearchContext *next;
-
- /**
- * For update-searches, link to the
- * previous child belonging to the same
- * parent.
- */
- struct GNUNET_FS_SearchContext *prev;
-
- /**
- * Connection to the FS service.
- */
- struct GNUNET_CLIENT_Connection *client;
-
- /**
- * Pointer we keep for the client.
- */
- void *client_info;
-
- /**
- * Map that contains a "struct SearchResult" for each result that
- * was found in the search. The key for each entry is the XOR of
- * the key and query in the CHK URI (as a unique identifier for the
- * search result).
- */
- struct GNUNET_CONTAINER_MultiHashMap *master_result_map;
-
- /**
- * Per-keyword information for a keyword search.
- * This array will have exactly as many entries
- * as there were keywords.
- */
- struct SearchRequestEntry *requests;
-
- /**
- * When did we start?
- */
- struct GNUNET_TIME_Absolute start_time;
-
- /**
- * ID of a task that is using this struct
- * and that must be cancelled when the search
- * is being stopped (if not GNUNET_SCHEDULER_NO_TASK).
- * Used for the task that adds some artificial
- * delay when trying to reconnect to the FS
- * service.
- */
- GNUNET_SCHEDULER_TaskIdentifier task;
-
- /**
- * Anonymity level for the search.
- */
- uint32_t anonymity;
-
- /**
- * Number of mandatory keywords in this query.
- */
- uint32_t mandatory_count;
-};
-
-
-/**
- * Information about an active download request.
- */
-struct DownloadRequest
-{
- /**
- * While pending, we keep all download requests
- * in a linked list.
- */
- struct DownloadRequest *next;
-
- /**
- * CHK for the request.
- */
- struct ContentHashKey chk;
-
- /**
- * Offset of the corresponding block.
- */
- uint64_t offset;
-
- /**
- * Depth of the corresponding block in the tree.
- */
- unsigned int depth;
-
- /**
- * Set if this request is currently in the linked list of pending
- * requests. Needed in case we get a response for a request that we
- * have not yet send (due to FS bug or two blocks with identical
- * content); in this case, we would need to remove the block from
- * the pending list (and need a fast way to check if the block is on
- * it).
- */
- int is_pending;
-
-};
-
-
-/**
- * Context for controlling a download.
- */
-struct GNUNET_FS_DownloadContext
-{
-
- /**
- * Global FS context.
- */
- struct GNUNET_FS_Handle *h;
-
- /**
- * Connection to the FS service.
- */
- struct GNUNET_CLIENT_Connection *client;
-
- /**
- * Parent download (used when downloading files
- * in directories).
- */
- struct GNUNET_FS_DownloadContext *parent;
-
- /**
- * Head of list of child downloads.
- */
- struct GNUNET_FS_DownloadContext *child_head;
-
- /**
- * Tail of list of child downloads.
- */
- struct GNUNET_FS_DownloadContext *child_tail;
-
- /**
- * Previous download belonging to the same parent.
- */
- struct GNUNET_FS_DownloadContext *prev;
-
- /**
- * Next download belonging to the same parent.
- */
- struct GNUNET_FS_DownloadContext *next;
-
- /**
- * Context kept for the client.
- */
- void *client_info;
-
- /**
- * URI that identifies the file that
- * we are downloading.
- */
- struct GNUNET_FS_Uri *uri;
-
- /**
- * Known meta-data for the file (can be NULL).
- */
- struct GNUNET_CONTAINER_MetaData *meta;
-
- /**
- * Error message, NULL if we're doing OK.
- */
- char *emsg;
-
- /**
- * Where are we writing the data (name of the
- * file, can be NULL!).
- */
- char *filename;
-
- /**
- * Where are we writing the data temporarily (name of the
- * file, can be NULL!); used if we do not have a permanent
- * name and we are a directory and we do a recursive download.
- */
- char *temp_filename;
-
- /**
- * Map of active requests (those waiting
- * for a response). The key is the hash
- * of the encryped block (aka query).
- */
- struct GNUNET_CONTAINER_MultiHashMap *active;
-
- /**
- * Linked list of pending requests.
- */
- struct DownloadRequest *pending;
-
- /**
- * The file handle, NULL if we don't create
- * a file.
- */
- struct GNUNET_DISK_FileHandle *handle;
-
- /**
- * Non-NULL if we are currently having a request for
- * transmission pending with the client handle.
- */
- struct GNUNET_CLIENT_TransmitHandle *th;
-
- /**
- * Identity of the peer having the content, or all-zeros
- * if we don't know of such a peer.
- */
- struct GNUNET_PeerIdentity target;
-
- /**
- * ID of a task that is using this struct
- * and that must be cancelled when the download
- * is being stopped (if not GNUNET_SCHEDULER_NO_TASK).
- * Used for the task that adds some artificial
- * delay when trying to reconnect to the FS
- * service.
- */
- GNUNET_SCHEDULER_TaskIdentifier task;
-
- /**
- * What was the size of the file on disk that we're downloading
- * before we started? Used to detect if there is a point in
- * checking an existing block on disk for matching the desired
- * content. 0 if the file did not exist already.
- */
- uint64_t old_file_size;
-
- /**
- * What is the first offset that we're interested
- * in?
- */
- uint64_t offset;
-
- /**
- * How many bytes starting from offset are desired?
- * This is NOT the overall length of the file!
- */
- uint64_t length;
-
- /**
- * How many bytes have we already received within
- * the specified range (DBlocks only).
- */
- uint64_t completed;
-
- /**
- * Time download was started.
- */
- struct GNUNET_TIME_Absolute start_time;
-
- /**
- * Desired level of anonymity.
- */
- uint32_t anonymity;
-
- /**
- * The depth of the file-tree.
- */
- unsigned int treedepth;
-
- /**
- * Options for the download.
- */
- enum GNUNET_FS_DownloadOptions options;
-
- /**
- * Flag set upon transitive completion (includes child downloads).
- * This flag is only set to GNUNET_YES for directories where all
- * child-downloads have also completed (and signalled completion).
- */
- int has_finished;
-
-};
-
-struct GNUNET_FS_Namespace
-{
-
- /**
- * Private key for the namespace.
- */
- struct GNUNET_CRYPTO_RsaPrivateKey *key;
-
- /**
- * Name of the file with the private key.
- */
- char *filename;
-
- /**
- * Reference counter.
- */
- unsigned int rc;
-};
+#include "gnunet_block_lib.h"
+#include "block_fs.h"
/**
- * @brief index block (indexing a DBlock that
- * can be obtained directly from reading
- * the plaintext file)
+ * Size of the individual blocks used for file-sharing.
*/
-struct OnDemandBlock
-{
- /**
- * Hash code of the entire content of the
- * file that was indexed (used to uniquely
- * identify the plaintext file).
- */
- GNUNET_HashCode file_id;
-
- /**
- * At which offset should we be able to find
- * this on-demand encoded block? (in NBO)
- */
- uint64_t offset GNUNET_PACKED;
-
-};
-
+#define DBLOCK_SIZE (32 * 1024)
/**
- * @brief keyword block (advertising data under a keyword)
+ * Blocksize to use when hashing files for indexing (blocksize for IO,
+ * not for the DBlocks). Larger blocksizes can be more efficient but
+ * will be more disruptive as far as the scheduler is concerned.
*/
-struct KBlock
-{
+#define HASHING_BLOCKSIZE (1024 * 128)
- /**
- * GNUNET_RSA_Signature using RSA-key generated from search keyword.
- */
- struct GNUNET_CRYPTO_RsaSignature signature;
-
- /**
- * What is being signed and why?
- */
- struct GNUNET_CRYPTO_RsaSignaturePurpose purpose;
-
- /**
- * Key generated (!) from the H(keyword) as the seed!
- */
- struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded keyspace;
-
- /* 0-terminated URI here */
-
- /* variable-size Meta-Data follows here */
-
-};
/**
- * @brief namespace content block (advertising data under an identifier in a namespace)
+ * @brief content hash key
*/
-struct SBlock
+struct ContentHashKey
{
-
- /**
- * GNUNET_RSA_Signature using RSA-key of the namespace
- */
- struct GNUNET_CRYPTO_RsaSignature signature;
-
- /**
- * What is being signed and why?
- */
- struct GNUNET_CRYPTO_RsaSignaturePurpose purpose;
-
/**
- * Hash of the hash of the human-readable identifier used for
- * this entry (the hash of the human-readable identifier is
- * used as the key for decryption; the xor of this identifier
- * and the hash of the "keyspace" is the datastore-query hash).
+ * Hash of the original content, used for encryption.
*/
- GNUNET_HashCode identifier;
+ struct GNUNET_HashCode key;
/**
- * Public key of the namespace.
+ * Hash of the encrypted content, used for querying.
*/
- struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded subspace;
-
- /* 0-terminated update-identifier here */
-
- /* 0-terminated URI here (except for NBlocks) */
-
- /* variable-size Meta-Data follows here */
-
+ struct GNUNET_HashCode query;
};
-/**
- * @brief namespace advertisement block (advertising root of a namespace)
- */
-struct NBlock
-{
-
- /**
- * GNUNET_RSA_Signature using RSA-key generated from search keyword.
- */
- struct GNUNET_CRYPTO_RsaSignature ksk_signature;
-
- /**
- * What is being signed and why?
- */
- struct GNUNET_CRYPTO_RsaSignaturePurpose ksk_purpose;
-
- /**
- * Key generated (!) from the H(keyword) as the seed!
- */
- struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded keyspace;
-
- /**
- * GNUNET_RSA_Signature using RSA-key of the namespace
- */
- struct GNUNET_CRYPTO_RsaSignature ns_signature;
-
- /**
- * What is being signed and why?
- */
- struct GNUNET_CRYPTO_RsaSignaturePurpose ns_purpose;
-
- /**
- * Public key of the namespace.
- */
- struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded subspace;
-
- /* from here on, data is encrypted with H(keyword) */
-
- /* 0-terminated root identifier here */
-
- /* variable-size Meta-Data follows here */
-
-};
-
+GNUNET_NETWORK_STRUCT_BEGIN
/**
* Message sent from a GNUnet (fs) publishing activity to the
{
/**
- * Message type will be GNUNET_MESSAGE_TYPE_FS_INDEX_START.
+ * Message type will be #GNUNET_MESSAGE_TYPE_FS_INDEX_START.
*/
struct GNUNET_MessageHeader header;
+ /**
+ * For alignment.
+ */
+ uint32_t reserved GNUNET_PACKED;
+
/**
* ID of device containing the file, as seen by the client. This
* device ID is obtained using a call like "statvfs" (and converting
* OS does not support this, in which case the service must do a
* full hash recomputation.
*/
- uint32_t device GNUNET_PACKED;
-
+ uint64_t device GNUNET_PACKED;
+
/**
* Inode of the file on the given device, as seen by the client
* ("st_ino" field from "struct stat"). Use 0 if the OS does not
/**
* Hash of the file that we would like to index.
*/
- GNUNET_HashCode file_id;
+ struct GNUNET_HashCode file_id;
/* this is followed by a 0-terminated
- filename of a file with the hash
- "file_id" as seen by the client */
+ * filename of a file with the hash
+ * "file_id" as seen by the client */
};
struct IndexInfoMessage
{
/**
- * Message type will be
- * GNUNET_MESSAGE_TYPE_FS_INDEX_LIST_ENTRY.
+ * Message type will be
+ * #GNUNET_MESSAGE_TYPE_FS_INDEX_LIST_ENTRY.
*/
struct GNUNET_MessageHeader header;
/**
* Hash of the indexed file.
*/
- GNUNET_HashCode file_id;
+ struct GNUNET_HashCode file_id;
/* this is followed by a 0-terminated
- filename of a file with the hash
- "file_id" as seen by the client */
-
+ * filename of a file with the hash
+ * "file_id" as seen by the client */
+
};
{
/**
- * Message type will be
- * GNUNET_MESSAGE_TYPE_FS_UNINDEX.
+ * Message type will be #GNUNET_MESSAGE_TYPE_FS_UNINDEX.
*/
struct GNUNET_MessageHeader header;
/**
* Hash of the file that we will unindex.
*/
- GNUNET_HashCode file_id;
+ struct GNUNET_HashCode file_id;
};
+/**
+ * No options.
+ */
+#define SEARCH_MESSAGE_OPTION_NONE 0
+
+/**
+ * Only search the local datastore (no network)
+ */
+#define SEARCH_MESSAGE_OPTION_LOOPBACK_ONLY 1
+
+/**
+ * Request is too large to fit in 64k format. The list of
+ * already-known search results will be continued in another message
+ * for the same type/query/target and additional already-known results
+ * following this one).
+ */
+#define SEARCH_MESSAGE_OPTION_CONTINUED 2
+
+
/**
* Message sent from a GNUnet (fs) search activity to the
* gnunet-service-fs to start a search.
{
/**
- * Message type will be
- * GNUNET_MESSAGE_TYPE_FS_START_SEARCH.
+ * Message type will be #GNUNET_MESSAGE_TYPE_FS_START_SEARCH.
*/
struct GNUNET_MessageHeader header;
/**
- * Should be zero.
+ * Bitmask with options. Zero for no options, one for
+ * loopback-only, two for 'to be continued' (with a second search
+ * message for the same type/query/target and additional
+ * already-known results following this one). See
+ * SEARCH_MESSAGE_OPTION_ defines.
+ *
+ * Other bits are currently not defined.
*/
- int32_t reserved GNUNET_PACKED;
+ uint32_t options GNUNET_PACKED;
/**
* Type of the content that we're looking for.
* nevertheless, we should probably not use it for a DHT-lookup
* or similar blunt actions in order to avoid exposing ourselves).
* <p>
- * If the request is for an SBLOCK, this is the identity of the
- * pseudonym to which the SBLOCK belongs.
- * <p>
- * If the request is for a KBLOCK, "target" must be all zeros.
+ * Otherwise, "target" must be all zeros.
*/
- GNUNET_HashCode target;
+ struct GNUNET_PeerIdentity target;
/**
- * Hash of the keyword (aka query) for KBLOCKs; Hash of
- * the CHK-encoded block for DBLOCKS and IBLOCKS (aka query)
- * and hash of the identifier XORed with the target for
- * SBLOCKS (aka query).
+ * Hash of the public key for UBLOCKs; Hash of
+ * the CHK-encoded block for DBLOCKS and IBLOCKS.
*/
- GNUNET_HashCode query;
+ struct GNUNET_HashCode query;
/* this is followed by the hash codes of already-known
- results (which should hence be excluded from what
- the service returns); naturally, this only applies
- to queries that can have multiple results, such as
- those for KBLOCKS (KSK) and SBLOCKS (SKS) */
+ * results (which should hence be excluded from what
+ * the service returns); naturally, this only applies
+ * to queries that can have multiple results (UBLOCKS).
+ */
};
/**
- * Only the (mandatory) query is included.
- */
-#define GET_MESSAGE_BIT_QUERY_ONLY 0
-
-/**
- * The peer identity of a peer waiting for the
- * reply is included (used if the response
- * should be transmitted to someone other than
- * the sender of the GET).
- */
-#define GET_MESSAGE_BIT_RETURN_TO 1
-
-/**
- * The hash of the public key of the target
- * namespace is included (for SKS queries).
- */
-#define GET_MESSAGE_BIT_SKS_NAMESPACE 2
-
-/**
- * The peer identity of a peer that had claimed to have the content
- * previously is included (can be used if responder-anonymity is not
- * desired; note that the precursor presumably lacked a direct
- * connection to the specified peer; still, the receiver is in no way
- * required to limit forwarding only to the specified peer, it should
- * only prefer it somewhat if possible).
- */
-#define GET_MESSAGE_BIT_TRANSMIT_TO 4
-
-
-/**
- * Message sent between peers asking for FS-content.
+ * Response from FS service with a result for a previous FS search.
+ * Note that queries for DBLOCKS and IBLOCKS that have received a
+ * single response are considered done. This message is transmitted
+ * between peers.
*/
-struct GetMessage
+struct PutMessage
{
/**
- * Message type will be GNUNET_MESSAGE_TYPE_FS_GET.
+ * Message type will be #GNUNET_MESSAGE_TYPE_FS_PUT.
*/
struct GNUNET_MessageHeader header;
/**
- * Type of the query (block type).
+ * Type of the block (in big endian). Should never be zero.
*/
uint32_t type GNUNET_PACKED;
/**
- * How important is this request (network byte order)
- */
- uint32_t priority GNUNET_PACKED;
-
- /**
- * Relative time to live in GNUNET_CRON_MILLISECONDS (network byte order)
- */
- int32_t ttl GNUNET_PACKED;
-
- /**
- * The content hash should be mutated using this value
- * before checking against the bloomfilter (used to
- * get many different filters for the same hash codes).
- * The number should be in big-endian format when used
- * for mingling.
- */
- int32_t filter_mutator GNUNET_PACKED;
-
- /**
- * Which of the optional hash codes are present at the end of the
- * message? See GET_MESSAGE_BIT_xx constants. For each bit that is
- * set, an additional GNUNET_HashCode with the respective content
- * (in order of the bits) will be appended to the end of the GET
- * message.
+ * When does this result expire?
*/
- uint32_t hash_bitmap GNUNET_PACKED;
+ struct GNUNET_TIME_AbsoluteNBO expiration;
- /**
- * Hashcodes of the file(s) we're looking for.
- * Details depend on the query type.
- */
- GNUNET_HashCode query GNUNET_PACKED;
+ /* this is followed by the actual encrypted content */
- /* this is followed by hash codes
- as specified in the "hash_bitmap";
- after that, an optional bloomfilter
- (with bits set for replies that should
- be suppressed) can be present */
};
-
/**
* Response from FS service with a result for a previous FS search.
* Note that queries for DBLOCKS and IBLOCKS that have received a
* single response are considered done. This message is transmitted
- * between peers as well as between the service and a client.
+ * between the service and a client.
*/
-struct PutMessage
+struct ClientPutMessage
{
/**
- * Message type will be GNUNET_MESSAGE_TYPE_FS_PUT.
+ * Message type will be #GNUNET_MESSAGE_TYPE_FS_PUT.
*/
struct GNUNET_MessageHeader header;
uint32_t type GNUNET_PACKED;
/**
- * When does this result expire?
+ * When does this result expire?
*/
struct GNUNET_TIME_AbsoluteNBO expiration;
+ /**
+ * When was the last time we've tried to download this block?
+ * (FOREVER if unknown/not relevant)
+ */
+ struct GNUNET_TIME_AbsoluteNBO last_transmission;
+
+ /**
+ * How often did we transmit this query before getting an
+ * answer (estimate).
+ */
+ uint32_t num_transmissions;
+
+ /**
+ * How much respect did we offer (in total) before getting an
+ * answer (estimate).
+ */
+ uint32_t respect_offered;
+
/* this is followed by the actual encrypted content */
};
+GNUNET_NETWORK_STRUCT_END
#endif
projects / oweals / gnunet.git / blobdiff