/*
This file is part of GNUnet.
- (C) 2009 Christian Grothoff (and other contributing authors)
+ (C) 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
#include "gnunet_service_lib.h"
#include "gnunet_namestore_service.h"
#include "gnunet_namestore_plugin.h"
+#include "gnunet_signatures.h"
#include "namestore.h"
+#define LOG_STRERROR_FILE(kind,syscall,filename) GNUNET_log_from_strerror_file (kind, "util", syscall, filename)
+
+/**
+ * A namestore operation.
+ */
+struct GNUNET_NAMESTORE_ZoneIteration
+{
+ /**
+ * Next element in the DLL
+ */
+ struct GNUNET_NAMESTORE_ZoneIteration *next;
+
+ /**
+ * Previous element in the DLL
+ */
+ struct GNUNET_NAMESTORE_ZoneIteration *prev;
+
+ /**
+ * Namestore client which intiated this zone iteration
+ */
+ struct GNUNET_NAMESTORE_Client *client;
+
+ /**
+ * GNUNET_YES if we iterate over a specific zone
+ * GNUNET_NO if we iterate over all zones
+ */
+ int has_zone;
+
+ /**
+ * Hash of the specific zone if 'has_zone' is GNUNET_YES,
+ * othwerwise set to '\0'
+ */
+ struct GNUNET_CRYPTO_ShortHashCode zone;
+
+ /**
+ * The operation id fot the zone iteration in the response for the client
+ */
+ uint64_t request_id;
+
+ /**
+ * Offset of the zone iteration used to address next result of the zone
+ * iteration in the store
+ *
+ * Initialy set to 0 in handle_iteration_start
+ * Incremented with by every call to handle_iteration_next
+ *
+ */
+ uint32_t offset;
+
+ /**
+ * Which flags must be included
+ */
+ uint16_t must_have_flags;
+
+ /**
+ * Which flags must not be included
+ */
+ uint16_t must_not_have_flags;
+};
+
+
+/**
+ * A namestore client
+ */
+struct GNUNET_NAMESTORE_Client
+{
+ /**
+ * Next element in the DLL
+ */
+ struct GNUNET_NAMESTORE_Client *next;
+
+ /**
+ * Previous element in the DLL
+ */
+ struct GNUNET_NAMESTORE_Client *prev;
+
+ /**
+ * The client
+ */
+ struct GNUNET_SERVER_Client *client;
+
+ /**
+ * Head of the DLL of
+ * Zone iteration operations in progress initiated by this client
+ */
+ struct GNUNET_NAMESTORE_ZoneIteration *op_head;
+
+ /**
+ * Tail of the DLL of
+ * Zone iteration operations in progress initiated by this client
+ */
+ struct GNUNET_NAMESTORE_ZoneIteration *op_tail;
+};
+
+
+/**
+ * A container struct to store information belonging to a zone crypto key pair
+ */
+struct GNUNET_NAMESTORE_CryptoContainer
+{
+ /**
+ * Filename where to store the container
+ */
+ char *filename;
+
+ /**
+ * Short hash of the zone's public key
+ */
+ struct GNUNET_CRYPTO_ShortHashCode zone;
+
+ /**
+ * Zone's private key
+ */
+ struct GNUNET_CRYPTO_RsaPrivateKey *privkey;
+
+ /**
+ * Zone's public key
+ */
+ struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pubkey;
+};
+
+
/**
* Configuration handle.
*/
const struct GNUNET_CONFIGURATION_Handle *GSN_cfg;
-static struct GNUNET_NAMESTORE_PluginFunctions *GSN_database;
+/**
+ * Database handle
+ */
+struct GNUNET_NAMESTORE_PluginFunctions *GSN_database;
+
+/**
+ * Zonefile directory
+ */
+static char *zonefile_directory;
+/**
+ * Name of the database plugin
+ */
static char *db_lib_name;
+/**
+ * Our notification context.
+ */
+static struct GNUNET_SERVER_NotificationContext *snc;
+
+/**
+ * Head of the Client DLL
+ */
+static struct GNUNET_NAMESTORE_Client *client_head;
+
+/**
+ * Tail of the Client DLL
+ */
+static struct GNUNET_NAMESTORE_Client *client_tail;
+
+/**
+ * Hashmap containing the zone keys this namestore has is authoritative for
+ *
+ * Keys are the GNUNET_CRYPTO_HashCode of the GNUNET_CRYPTO_ShortHashCode
+ * The values are 'struct GNUNET_NAMESTORE_CryptoContainer *'
+ */
+struct GNUNET_CONTAINER_MultiHashMap *zonekeys;
+
+
+/**
+ * Writes the encrypted private key of a zone in a file
+ *
+ * @param filename where to store the zone
+ * @param c the crypto container containing private key of the zone
+ * @return GNUNET_OK on success, GNUNET_SYSERR on fail
+ */
+static int
+write_key_to_file (const char *filename, struct GNUNET_NAMESTORE_CryptoContainer *c)
+{
+ struct GNUNET_CRYPTO_RsaPrivateKey *ret = c->privkey;
+ struct GNUNET_CRYPTO_RsaPrivateKeyBinaryEncoded *enc;
+ struct GNUNET_DISK_FileHandle *fd;
+
+ if (GNUNET_YES == GNUNET_DISK_file_test (filename))
+ {
+ struct GNUNET_CRYPTO_ShortHashCode zone;
+ struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pubkey;
+ struct GNUNET_CRYPTO_RsaPrivateKey *privkey;
+
+ privkey = GNUNET_CRYPTO_rsa_key_create_from_file(filename);
+ if (privkey == NULL)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("File zone `%s' but corrupt content already exists, failed to write! \n"),
+ GNUNET_short_h2s (&zone));
+ return GNUNET_SYSERR;
+ }
+
+ GNUNET_CRYPTO_rsa_key_get_public (privkey, &pubkey);
+ GNUNET_CRYPTO_short_hash (&pubkey, sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded), &zone);
+ GNUNET_CRYPTO_rsa_key_free (privkey);
+
+ if (0 == memcmp (&zone, &c->zone, sizeof(zone)))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ _("File zone `%s' containing this key already exists\n"), GNUNET_short_h2s (&zone));
+ return GNUNET_OK;
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("File zone `%s' but different zone key already exists, failed to write! \n"),
+ GNUNET_short_h2s (&zone));
+ return GNUNET_OK;
+ }
+ }
+ fd = GNUNET_DISK_file_open (filename, GNUNET_DISK_OPEN_WRITE | GNUNET_DISK_OPEN_CREATE | GNUNET_DISK_OPEN_FAILIFEXISTS, GNUNET_DISK_PERM_USER_READ | GNUNET_DISK_PERM_USER_WRITE);
+ if (NULL == fd)
+ {
+ if (errno == EEXIST)
+ {
+ if (GNUNET_YES != GNUNET_DISK_file_test (filename))
+ {
+ /* must exist but not be accessible, fail for good! */
+ if (0 != ACCESS (filename, R_OK))
+ LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_ERROR, "access", filename);
+ else
+ GNUNET_break (0); /* what is going on!? */
+ return GNUNET_SYSERR;
+ }
+ }
+ LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_ERROR, "open", filename);
+ return GNUNET_SYSERR;
+ }
+
+ if (GNUNET_YES != GNUNET_DISK_file_lock (fd, 0, sizeof (struct GNUNET_CRYPTO_RsaPrivateKeyBinaryEncoded), GNUNET_YES))
+ {
+ GNUNET_assert (GNUNET_YES == GNUNET_DISK_file_close (fd));
+ return GNUNET_SYSERR;
+ }
+ enc = GNUNET_CRYPTO_rsa_encode_key (ret);
+ GNUNET_assert (enc != NULL);
+ GNUNET_assert (ntohs (enc->len) == GNUNET_DISK_file_write (fd, enc, ntohs (enc->len)));
+ GNUNET_free (enc);
+ GNUNET_DISK_file_sync (fd);
+ if (GNUNET_YES != GNUNET_DISK_file_unlock (fd, 0, sizeof (struct GNUNET_CRYPTO_RsaPrivateKeyBinaryEncoded)))
+ LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING, "fcntl", filename);
+ GNUNET_assert (GNUNET_YES == GNUNET_DISK_file_close (fd));
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Stored zonekey for zone `%s' in file `%s'\n",
+ GNUNET_short_h2s(&c->zone), c->filename);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Write all zone keys to disk.
+ * Iterates over all entries of the hashmap 'zonekeys'
+ *
+ * @param cls unused
+ * @param key zone key
+ * @param value 'struct GNUNET_NAMESTORE_CryptoContainer' containing the private
+ * key
+ * @return GNUNET_OK to continue iteration
+ */
+static int
+zone_to_disk_it (void *cls,
+ const struct GNUNET_HashCode *key,
+ void *value)
+{
+ struct GNUNET_NAMESTORE_CryptoContainer *c = value;
+ if (c->filename != NULL)
+ write_key_to_file(c->filename, c);
+ else
+ {
+ GNUNET_asprintf(&c->filename, "%s/%s.zkey", zonefile_directory, GNUNET_short_h2s (&c->zone));
+ write_key_to_file(c->filename, c);
+ }
+
+ GNUNET_assert (GNUNET_OK == GNUNET_CONTAINER_multihashmap_remove (zonekeys, key, value));
+ GNUNET_CRYPTO_rsa_key_free (c->privkey);
+ GNUNET_free (c->pubkey);
+ GNUNET_free (c->filename);
+ GNUNET_free (c);
+
+ return GNUNET_OK;
+}
+
+
+/**
+ * Returns the expiration time of the given block of records
+ * The block expiration time is the expiration time of the block with smallest
+ * expiration time
+ *
+ * @param rd_count number of records given in 'rd'
+ * @param rd array of records
+ * @return absolute expiration time
+ */
+static struct GNUNET_TIME_Absolute
+get_block_expiration_time (unsigned int rd_count, const struct GNUNET_NAMESTORE_RecordData *rd)
+{
+ unsigned int c;
+ struct GNUNET_TIME_Absolute expire = GNUNET_TIME_UNIT_FOREVER_ABS;
+ struct GNUNET_TIME_Absolute at;
+ struct GNUNET_TIME_Relative rt;
+
+ if (NULL == rd)
+ return GNUNET_TIME_UNIT_ZERO_ABS;
+ for (c = 0; c < rd_count; c++)
+ {
+ if (0 != (rd[c].flags & GNUNET_NAMESTORE_RF_RELATIVE_EXPIRATION))
+ {
+ rt.rel_value = rd[c].expiration_time;
+ at = GNUNET_TIME_relative_to_absolute (rt);
+ }
+ else
+ {
+ at.abs_value = rd[c].expiration_time;
+ }
+ expire = GNUNET_TIME_absolute_min (at, expire);
+ }
+ return expire;
+}
+
/**
* Task run during shutdown.
*
cleanup_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Stopping namestore service\n");
+ struct GNUNET_NAMESTORE_ZoneIteration *no;
+ struct GNUNET_NAMESTORE_ZoneIteration *tmp;
+ struct GNUNET_NAMESTORE_Client *nc;
+ struct GNUNET_NAMESTORE_Client *next;
+
+ if (NULL != snc)
+ {
+ GNUNET_SERVER_notification_context_destroy (snc);
+ snc = NULL;
+ }
+ GNUNET_CONTAINER_multihashmap_iterate(zonekeys, &zone_to_disk_it, NULL);
+ GNUNET_CONTAINER_multihashmap_destroy(zonekeys);
+
+ for (nc = client_head; nc != NULL; nc = next)
+ {
+ next = nc->next;
+ for (no = nc->op_head; no != NULL; no = tmp)
+ {
+ GNUNET_CONTAINER_DLL_remove (nc->op_head, nc->op_tail, no);
+ tmp = no->next;
+ GNUNET_free (no);
+ }
+ GNUNET_SERVER_client_drop(nc->client);
+ GNUNET_CONTAINER_DLL_remove (client_head, client_tail, nc);
+ GNUNET_free (nc);
+ }
GNUNET_break (NULL == GNUNET_PLUGIN_unload (db_lib_name, GSN_database));
GNUNET_free (db_lib_name);
+ GNUNET_free_non_null(zonefile_directory);
+}
+
+static struct GNUNET_NAMESTORE_Client *
+client_lookup (struct GNUNET_SERVER_Client *client)
+{
+ struct GNUNET_NAMESTORE_Client *nc;
+
+ GNUNET_assert (NULL != client);
+
+ for (nc = client_head; nc != NULL; nc = nc->next)
+ {
+ if (client == nc->client)
+ break;
+ }
+ return nc;
+}
+
+
+/**
+ * Called whenever a client is disconnected.
+ * Frees our resources associated with that client.
+ *
+ * @param cls closure
+ * @param client identification of the client
+ */
+static void
+client_disconnect_notification (void *cls, struct GNUNET_SERVER_Client *client)
+{
+ struct GNUNET_NAMESTORE_ZoneIteration *no;
+ struct GNUNET_NAMESTORE_Client *nc;
+ if (NULL == client)
+ return;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Client %p disconnected \n", client);
+
+ nc = client_lookup (client);
+
+ if ((NULL == client) || (NULL == nc))
+ return;
+
+ no = nc->op_head;
+ while (NULL != no)
+ {
+ GNUNET_CONTAINER_DLL_remove (nc->op_head, nc->op_tail, no);
+ GNUNET_free (no);
+ no = nc->op_head;
+ }
+
+ GNUNET_SERVER_client_drop(nc->client);
+ GNUNET_CONTAINER_DLL_remove (client_head, client_tail, nc);
+ GNUNET_free (nc);
+ nc = NULL;
+}
+
+
+/**
+ * Handles a 'GNUNET_MESSAGE_TYPE_NAMESTORE_START' message
+ *
+ * @param cls unused
+ * @param client GNUNET_SERVER_Client sending the message
+ * @param message unused
+ */
+static void
+handle_start (void *cls,
+ struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Client %p connected\n", client);
+
+ struct GNUNET_NAMESTORE_Client *nc = GNUNET_malloc (sizeof (struct GNUNET_NAMESTORE_Client));
+ nc->client = client;
+ GNUNET_SERVER_notification_context_add (snc, client);
+ GNUNET_CONTAINER_DLL_insert(client_head, client_tail, nc);
+ GNUNET_SERVER_client_keep (client);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+}
+
+
+/**
+ * LookupNameContext
+ *
+ * Context for name lookups passed from 'handle_lookup_name' to
+ * 'handle_lookup_name_it' as closure
+ */
+struct LookupNameContext
+{
+ /**
+ * The client to send the response to
+ */
+ struct GNUNET_NAMESTORE_Client *nc;
+
+ /**
+ * Operation id for the name lookup
+ */
+ uint32_t request_id;
+
+ /**
+ * Requested specific record type
+ */
+ uint32_t record_type;
+
+ /**
+ * Requested zone
+ */
+ struct GNUNET_CRYPTO_ShortHashCode *zone;
+
+ /**
+ * Requested name
+ */
+ char *name;
+};
+
+
+/**
+ * A 'GNUNET_NAMESTORE_RecordIterator' for name lookups in handle_lookup_name
+ *
+ * @param cls a 'struct LookupNameContext *' with information about the request
+ * @param zone_key zone key of the zone
+ * @param expire expiration time
+ * @param name name
+ * @param rd_count number of records
+ * @param rd array of records
+ * @param signature signature
+ */
+static void
+handle_lookup_name_it (void *cls,
+ const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
+ struct GNUNET_TIME_Absolute expire,
+ const char *name,
+ unsigned int rd_count,
+ const struct GNUNET_NAMESTORE_RecordData *rd,
+ const struct GNUNET_CRYPTO_RsaSignature *signature)
+{
+ /* send response */
+ struct LookupNameContext *lnc = cls;
+ struct LookupNameResponseMessage *lnr_msg;
+ struct GNUNET_NAMESTORE_RecordData *rd_selected = NULL;
+ struct GNUNET_NAMESTORE_CryptoContainer *cc;
+ struct GNUNET_CRYPTO_RsaSignature *signature_new = NULL;
+ struct GNUNET_TIME_Absolute e;
+ struct GNUNET_CRYPTO_ShortHashCode zone_key_hash;
+ struct GNUNET_HashCode long_hash;
+ char *rd_tmp;
+ char *name_tmp;
+ size_t rd_ser_len;
+ size_t r_size = 0;
+ size_t name_len = 0;
+
+ int copied_elements = 0;
+ int contains_signature = GNUNET_NO;
+ int authoritative = GNUNET_NO;
+ int c;
+
+ if (NULL != name)
+ name_len = strlen(name) + 1;
+
+ /* count records to copy */
+ if (rd_count != 0)
+ {
+ if (lnc->record_type != 0)
+ {
+ /* special record type needed */
+ for (c = 0; c < rd_count; c ++)
+ if (rd[c].record_type == lnc->record_type)
+ copied_elements++; /* found matching record */
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found %u records with type %u for name `%s' in zone `%s'\n",
+ copied_elements, lnc->record_type, lnc->name, GNUNET_short_h2s(lnc->zone));
+ rd_selected = GNUNET_malloc (copied_elements * sizeof (struct GNUNET_NAMESTORE_RecordData));
+ copied_elements = 0;
+ for (c = 0; c < rd_count; c ++)
+ {
+ if (rd[c].record_type == lnc->record_type)
+ {
+ /* found matching record */
+ memcpy (&rd_selected[copied_elements], &rd[c], sizeof (struct GNUNET_NAMESTORE_RecordData));
+ copied_elements++;
+ }
+ }
+ }
+ else
+ {
+ copied_elements = rd_count;
+ rd_selected = (struct GNUNET_NAMESTORE_RecordData *) rd;
+ }
+ }
+ else
+ {
+ /* No results */
+ copied_elements = 0;
+ rd_selected = NULL;
+ expire = GNUNET_TIME_UNIT_ZERO_ABS;
+ }
+
+ rd_ser_len = GNUNET_NAMESTORE_records_get_size(copied_elements, rd_selected);
+ char rd_ser[rd_ser_len];
+ GNUNET_NAMESTORE_records_serialize(copied_elements, rd_selected, rd_ser_len, rd_ser);
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found %u records for name `%s' in zone `%s'\n",
+ copied_elements, lnc->name, GNUNET_short_h2s(lnc->zone));
+
+ if ((copied_elements == rd_count) && (NULL != signature))
+ contains_signature = GNUNET_YES; /* returning all records, so include signature */
+ else
+ contains_signature = GNUNET_NO; /* returning not all records, so do not include signature */
+
+
+ if ((NULL != zone_key) && (copied_elements == rd_count))
+ {
+ GNUNET_CRYPTO_short_hash(zone_key, sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded), &zone_key_hash);
+ GNUNET_CRYPTO_short_hash_double (&zone_key_hash, &long_hash);
+ if (GNUNET_CONTAINER_multihashmap_contains(zonekeys, &long_hash))
+ {
+ cc = GNUNET_CONTAINER_multihashmap_get(zonekeys, &long_hash);
+ e = get_block_expiration_time(rd_count, rd);
+ signature_new = GNUNET_NAMESTORE_create_signature(cc->privkey, e, name, rd, rd_count);
+ GNUNET_assert (signature_new != NULL);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Creating signature for name `%s' with %u records in zone `%s'\n",name, copied_elements, GNUNET_short_h2s(&zone_key_hash));
+ authoritative = GNUNET_YES;
+ }
+ else
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "I am not authoritative for name `%s' in zone `%s'\n",name, GNUNET_short_h2s(&zone_key_hash));
+ }
+
+ r_size = sizeof (struct LookupNameResponseMessage) +
+ sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded) +
+ name_len +
+ rd_ser_len;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message\n", "NAMESTORE_LOOKUP_NAME_RESPONSE");
+ lnr_msg = GNUNET_malloc (r_size);
+ lnr_msg->gns_header.header.type = ntohs (GNUNET_MESSAGE_TYPE_NAMESTORE_LOOKUP_NAME_RESPONSE);
+ lnr_msg->gns_header.header.size = ntohs (r_size);
+ lnr_msg->gns_header.r_id = htonl (lnc->request_id);
+ lnr_msg->rd_count = htons (copied_elements);
+ lnr_msg->rd_len = htons (rd_ser_len);
+ lnr_msg->name_len = htons (name_len);
+ lnr_msg->expire = GNUNET_TIME_absolute_hton(get_block_expiration_time(copied_elements, rd_selected));
+
+ if (rd_selected != rd)
+ GNUNET_free (rd_selected);
+
+ if (zone_key != NULL)
+ lnr_msg->public_key = (*zone_key);
+ else
+ memset(&lnr_msg->public_key, '\0', sizeof (lnr_msg->public_key));
+
+ if (GNUNET_YES == authoritative)
+ { /* use new created signature */
+ lnr_msg->contains_sig = htons (GNUNET_YES);
+ GNUNET_assert (signature_new != NULL);
+ lnr_msg->signature = *signature_new;
+ GNUNET_free (signature_new);
+ }
+ else if (GNUNET_YES == contains_signature)
+ {
+ /* use existing signature */
+ lnr_msg->contains_sig = htons (GNUNET_YES);
+ GNUNET_assert (signature != NULL);
+ lnr_msg->signature = *signature;
+ }
+ else
+ {
+ /* use no signature */
+ memset (&lnr_msg->signature, '\0', sizeof (lnr_msg->signature));
+ }
+
+ name_tmp = (char *) &lnr_msg[1];
+ rd_tmp = &name_tmp[name_len];
+
+ memcpy (name_tmp, name, name_len);
+ memcpy (rd_tmp, rd_ser, rd_ser_len);
+
+ GNUNET_SERVER_notification_context_unicast (snc, lnc->nc->client, (const struct GNUNET_MessageHeader *) lnr_msg, GNUNET_NO);
+ GNUNET_free (lnr_msg);
+}
+
+/**
+ * Handles a 'GNUNET_MESSAGE_TYPE_NAMESTORE_LOOKUP_NAME' message
+ *
+ * @param cls unused
+ * @param client GNUNET_SERVER_Client sending the message
+ * @param message message of type 'struct LookupNameMessage'
+ */
+static void
+handle_lookup_name (void *cls,
+ struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "NAMESTORE_LOOKUP_NAME");
+ struct LookupNameContext lnc;
+ struct GNUNET_NAMESTORE_Client *nc;
+ size_t name_len;
+ char *name;
+ uint32_t rid = 0;
+ uint32_t type = 0;
+
+ if (ntohs (message->size) < sizeof (struct LookupNameMessage))
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ nc = client_lookup(client);
+ if (nc == NULL)
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ struct LookupNameMessage *ln_msg = (struct LookupNameMessage *) message;
+ rid = ntohl (ln_msg->gns_header.r_id);
+ name_len = ntohl (ln_msg->name_len);
+ type = ntohl (ln_msg->record_type);
+
+ if ((name_len == 0) || (name_len > 256))
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ name = (char *) &ln_msg[1];
+ if (name[name_len -1] != '\0')
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ if (0 == type)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Looking up all records for name `%s' in zone `%s'\n", name, GNUNET_short_h2s(&ln_msg->zone));
+ else
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Looking up records with type %u for name `%s' in zone `%s'\n", type, name, GNUNET_short_h2s(&ln_msg->zone));
+
+ /* do the actual lookup */
+ lnc.request_id = rid;
+ lnc.nc = nc;
+ lnc.record_type = type;
+ lnc.name = name;
+ lnc.zone = &ln_msg->zone;
+ GSN_database->iterate_records(GSN_database->cls, &ln_msg->zone, name, 0, &handle_lookup_name_it, &lnc);
+
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+}
+
+
+/**
+ * Handles a 'GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_PUT' message
+ *
+ * @param cls unused
+ * @param client GNUNET_SERVER_Client sending the message
+ * @param message message of type 'struct RecordPutMessage'
+ */
+static void
+handle_record_put (void *cls,
+ struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "NAMESTORE_RECORD_PUT");
+ struct GNUNET_NAMESTORE_Client *nc;
+ struct RecordPutMessage *rp_msg;
+ struct GNUNET_TIME_Absolute expire;
+ struct GNUNET_CRYPTO_RsaSignature *signature;
+ struct RecordPutResponseMessage rpr_msg;
+ struct GNUNET_CRYPTO_ShortHashCode zone_hash;
+ size_t name_len;
+ size_t msg_size;
+ size_t msg_size_exp;
+ char *name;
+ char *rd_ser;
+ uint32_t rid = 0;
+ uint32_t rd_ser_len;
+ uint32_t rd_count;
+ int res = GNUNET_SYSERR;
+
+ if (ntohs (message->size) < sizeof (struct RecordPutMessage))
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ nc = client_lookup (client);
+ if (nc == NULL)
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ rp_msg = (struct RecordPutMessage *) message;
+ rid = ntohl (rp_msg->gns_header.r_id);
+ msg_size = ntohs (rp_msg->gns_header.header.size);
+ name_len = ntohs (rp_msg->name_len);
+ rd_count = ntohs (rp_msg->rd_count);
+ rd_ser_len = ntohs(rp_msg->rd_len);
+
+ if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ if ((rd_count < 1) || (rd_ser_len < 1) || (name_len >=256) || (name_len == 0))
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ msg_size_exp = sizeof (struct RecordPutMessage) + name_len + rd_ser_len;
+ if (msg_size != msg_size_exp)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Expected message %u size but message size is %u \n", msg_size_exp, msg_size);
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+ if ((name_len == 0) || (name_len > 256))
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ name = (char *) &rp_msg[1];
+
+ if (name[name_len -1] != '\0')
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ expire = GNUNET_TIME_absolute_ntoh(rp_msg->expire);
+ signature = (struct GNUNET_CRYPTO_RsaSignature *) &rp_msg->signature;
+
+ rd_ser = &name[name_len];
+ struct GNUNET_NAMESTORE_RecordData rd[rd_count];
+ res = GNUNET_NAMESTORE_records_deserialize(rd_ser_len, rd_ser, rd_count, rd);
+ if (res != GNUNET_OK)
+ {
+ GNUNET_break_op (0);
+ goto send;
+ }
+
+ GNUNET_CRYPTO_short_hash (&rp_msg->public_key, sizeof (rp_msg->public_key), &zone_hash);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Putting %u record for name `%s' in zone `%s'\n", rd_count, name, GNUNET_short_h2s(&zone_hash));
+
+ /* Database operation */
+ res = GSN_database->put_records(GSN_database->cls,
+ &rp_msg->public_key,
+ expire,
+ name,
+ rd_count, rd,
+ signature);
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Putting record for name `%s': %s\n",
+ name, (res == GNUNET_OK) ? "OK" : "FAIL");
+
+ /* Send response */
+send:
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message\n", "RECORD_PUT_RESPONSE");
+ rpr_msg.gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_PUT_RESPONSE);
+ rpr_msg.gns_header.header.size = htons (sizeof (struct RecordPutResponseMessage));
+ rpr_msg.gns_header.r_id = htonl (rid);
+ rpr_msg.op_result = htonl (res);
+ GNUNET_SERVER_notification_context_unicast (snc, nc->client, (const struct GNUNET_MessageHeader *) &rpr_msg, GNUNET_NO);
+
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+}
+
+
+/**
+ * CreateRecordContext
+ *
+ * Context for record create operations passed from 'handle_record_create' to
+ * 'handle_create_record_it' as closure
+ */
+struct CreateRecordContext
+{
+ /**
+ * Record data
+ */
+ struct GNUNET_NAMESTORE_RecordData *rd;
+
+ /**
+ * Zone's private key
+ */
+ struct GNUNET_CRYPTO_RsaPrivateKey *pkey;
+
+ /**
+ * Zone's public key
+ */
+ struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pubkey;
+
+ /**
+ * Record expiration time
+ */
+ struct GNUNET_TIME_Absolute expire;
+
+ /**
+ * Name for the record to create
+ */
+ char *name;
+
+ /**
+ * result returned from 'handle_create_record_it'
+ * GNUNET_SYSERR: failed to create the record
+ * GNUNET_NO: we updated an existing record or identical entry existed
+ * GNUNET_YES : we created a new record
+ */
+ int res;
+};
+
+
+/**
+ * A 'GNUNET_NAMESTORE_RecordIterator' for record create operations
+ * in handle_record_create
+ *
+ * @param cls a 'struct CreateRecordContext *' with information about the request
+ * @param pubkey zone key of the zone
+ * @param expire expiration time
+ * @param name name
+ * @param rd_count number of records
+ * @param rd array of records
+ * @param signature signature
+ */
+static void
+handle_create_record_it (void *cls,
+ const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pubkey,
+ struct GNUNET_TIME_Absolute expire,
+ const char *name,
+ unsigned int rd_count,
+ const struct GNUNET_NAMESTORE_RecordData *rd,
+ const struct GNUNET_CRYPTO_RsaSignature *signature)
+{
+ struct CreateRecordContext *crc = cls;
+ struct GNUNET_NAMESTORE_RecordData *rd_new = NULL;
+ struct GNUNET_CRYPTO_RsaSignature dummy_signature;
+ struct GNUNET_TIME_Absolute block_expiration;
+ int res;
+ int exist = GNUNET_SYSERR;
+ int update = GNUNET_NO;
+ int c;
+ int rd_count_new = 0;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found %u existing records for `%s'\n", rd_count, crc->name);
+ for (c = 0; c < rd_count; c++)
+ {
+ if ( (crc->rd->record_type == GNUNET_NAMESTORE_TYPE_PKEY) &&
+ (rd[c].record_type == GNUNET_NAMESTORE_TYPE_PKEY))
+ {
+ /* Update unique PKEY */
+ exist = c;
+ update = GNUNET_YES;
+ break;
+ }
+ if ( (crc->rd->record_type == GNUNET_NAMESTORE_TYPE_PSEU) &&
+ (rd[c].record_type == GNUNET_NAMESTORE_TYPE_PSEU))
+ {
+ /* Update unique PSEU */
+ exist = c;
+ update = GNUNET_YES;
+ break;
+ }
+ if ((crc->rd->record_type == rd[c].record_type) &&
+ (crc->rd->data_size == rd[c].data_size) &&
+ (0 == memcmp (crc->rd->data, rd[c].data, rd[c].data_size)))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Found existing records for `%s' to update expiration date!\n",
+ crc->name);
+ exist = c;
+ if ( (crc->rd->expiration_time != rd[c].expiration_time) &&
+ ((crc->rd->flags & GNUNET_NAMESTORE_RF_RELATIVE_EXPIRATION)
+ == (rd[c].flags & GNUNET_NAMESTORE_RF_RELATIVE_EXPIRATION) ) )
+ update = GNUNET_YES;
+ break;
+ }
+ }
+
+ if (exist == GNUNET_SYSERR)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "No existing record for name `%s'!\n",
+ crc->name);
+ rd_new = GNUNET_malloc ((rd_count+1) * sizeof (struct GNUNET_NAMESTORE_RecordData));
+ memcpy (rd_new, rd, rd_count * sizeof (struct GNUNET_NAMESTORE_RecordData));
+ rd_count_new = rd_count + 1;
+ rd_new[rd_count] = *(crc->rd);
+ }
+ else if (update == GNUNET_NO)
+ {
+ /* Exact same record already exists */
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Matching record for %s' exists, no change required!\n",
+ crc->name);
+ res = GNUNET_NO;
+ goto end;
+ }
+ else
+ {
+ /* Update record */
+ GNUNET_assert (GNUNET_YES == update);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Updating existing records for `%s'!\n",
+ crc->name);
+ rd_new = GNUNET_malloc ((rd_count) * sizeof (struct GNUNET_NAMESTORE_RecordData));
+ memcpy (rd_new, rd, rd_count * sizeof (struct GNUNET_NAMESTORE_RecordData));
+ rd_count_new = rd_count;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ (0 == (crc->rd->flags & GNUNET_NAMESTORE_RF_RELATIVE_EXPIRATION))
+ ? "Updating absolute expiration from %llu to %llu!\n"
+ : "Updating relative expiration from %llu to %llu!\n",
+ rd_new[exist].expiration_time, crc->rd->expiration_time);
+ rd_new[exist] = *(crc->rd);
+ }
+
+ block_expiration = GNUNET_TIME_absolute_max(crc->expire, expire);
+ if (block_expiration.abs_value != expire.abs_value)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Updated block expiration time\n");
+
+ memset (&dummy_signature, '\0', sizeof (dummy_signature));
+
+ /* Database operation */
+ GNUNET_assert ((rd_new != NULL) && (rd_count_new > 0));
+ res = GSN_database->put_records(GSN_database->cls,
+ (const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *) crc->pubkey,
+ block_expiration,
+ crc->name,
+ rd_count_new, rd_new,
+ &dummy_signature);
+ GNUNET_break (GNUNET_OK == res);
+ if (res == GNUNET_OK)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Successfully put record for `%s' in database \n", crc->name);
+ else
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failed to put record for `%s' in database \n", crc->name);
+ res = GNUNET_YES;
+
+end:
+ GNUNET_free_non_null (rd_new);
+
+ switch (res) {
+ case GNUNET_SYSERR:
+ /* failed to create the record */
+ crc->res = GNUNET_SYSERR;
+ break;
+ case GNUNET_YES:
+ /* database operations OK */
+ if (GNUNET_YES == update)
+ {
+ /* we updated an existing record */
+ crc->res = GNUNET_NO;
+ }
+ else
+ {
+ /* we created a new record */
+ crc->res = GNUNET_YES;
+ }
+ break;
+ case GNUNET_NO:
+ /* identical entry existed, so we did nothing */
+ crc->res = GNUNET_NO;
+ break;
+ default:
+ break;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Update result for name `%s' %u\n", crc->name, res);
+}
+
+
+/**
+ * Handles a 'GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_CREATE' message
+ *
+ * @param cls unused
+ * @param client GNUNET_SERVER_Client sending the message
+ * @param message message of type 'struct RecordCreateMessage'
+ */
+static void
+handle_record_create (void *cls,
+ struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "NAMESTORE_RECORD_CREATE");
+ struct GNUNET_NAMESTORE_Client *nc;
+ struct RecordCreateMessage *rp_msg;
+ struct GNUNET_NAMESTORE_CryptoContainer *cc;
+ struct CreateRecordContext crc;
+ struct GNUNET_CRYPTO_RsaPrivateKey *pkey;
+ struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pub;
+ struct RecordCreateResponseMessage rcr_msg;
+ struct GNUNET_CRYPTO_ShortHashCode pubkey_hash;
+ struct GNUNET_HashCode long_hash;
+ size_t name_len;
+ size_t msg_size;
+ size_t msg_size_exp;
+ size_t rd_ser_len;
+ size_t key_len;
+ uint32_t rid = 0;
+ char *pkey_tmp;
+ char *name_tmp;
+ char *rd_ser;
+ int rd_count;
+
+ int res = GNUNET_SYSERR;
+ crc.res = GNUNET_SYSERR;
+
+ if (ntohs (message->size) < sizeof (struct RecordCreateMessage))
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ nc = client_lookup(client);
+ if (nc == NULL)
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ rp_msg = (struct RecordCreateMessage *) message;
+ rid = ntohl (rp_msg->gns_header.r_id);
+ name_len = ntohs (rp_msg->name_len);
+ msg_size = ntohs (message->size);
+ rd_count = ntohs (rp_msg->rd_count);
+ rd_ser_len = ntohs (rp_msg->rd_len);
+ key_len = ntohs (rp_msg->pkey_len);
+ msg_size_exp = sizeof (struct RecordCreateMessage) + key_len + name_len + rd_ser_len;
+
+ if (msg_size != msg_size_exp)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Expected message %u size but message size is %u \n", msg_size_exp, msg_size);
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ if ((name_len == 0) || (name_len > 256))
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ pkey_tmp = (char *) &rp_msg[1];
+ name_tmp = &pkey_tmp[key_len];
+ rd_ser = &name_tmp[name_len];
+
+ if (name_tmp[name_len -1] != '\0')
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ struct GNUNET_NAMESTORE_RecordData rd[rd_count];
+
+ res = GNUNET_NAMESTORE_records_deserialize(rd_ser_len, rd_ser, rd_count, rd);
+ if ((res != GNUNET_OK) || (rd_count != 1))
+ {
+ GNUNET_break_op (0);
+ goto send;
+ }
+ /* Extracting and converting private key */
+ pkey = GNUNET_CRYPTO_rsa_decode_key((char *) pkey_tmp, key_len);
+ GNUNET_assert (pkey != NULL);
+ GNUNET_CRYPTO_rsa_key_get_public(pkey, &pub);
+ GNUNET_CRYPTO_short_hash (&pub, sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded), &pubkey_hash);
+ GNUNET_CRYPTO_short_hash_double (&pubkey_hash, &long_hash);
+
+ if (GNUNET_NO == GNUNET_CONTAINER_multihashmap_contains(zonekeys, &long_hash))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received new private key for zone `%s'\n",GNUNET_short_h2s(&pubkey_hash));
+
+ cc = GNUNET_malloc (sizeof (struct GNUNET_NAMESTORE_CryptoContainer));
+ cc->privkey = GNUNET_CRYPTO_rsa_decode_key((char *) pkey_tmp, key_len);
+ cc->pubkey = GNUNET_malloc(sizeof (pub));
+ memcpy (cc->pubkey, &pub, sizeof(pub));
+ cc->zone = pubkey_hash;
+ GNUNET_CONTAINER_multihashmap_put(zonekeys, &long_hash, cc, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
+ }
+
+ crc.expire = GNUNET_TIME_absolute_ntoh(rp_msg->expire);
+ crc.res = GNUNET_SYSERR;
+ crc.pkey = pkey;
+ crc.pubkey = &pub;
+ crc.rd = rd;
+ crc.name = name_tmp;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Creating record for name `%s' in zone `%s'\n", name_tmp, GNUNET_short_h2s(&pubkey_hash));
+
+ /* Get existing records for name */
+ res = GSN_database->iterate_records(GSN_database->cls, &pubkey_hash, name_tmp, 0, &handle_create_record_it, &crc);
+ if (res != GNUNET_SYSERR)
+ res = GNUNET_OK;
+ GNUNET_CRYPTO_rsa_key_free(pkey);
+ pkey = NULL;
+
+ /* Send response */
+send:
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message\n", "RECORD_CREATE_RESPONSE");
+ rcr_msg.gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_CREATE_RESPONSE);
+ rcr_msg.gns_header.header.size = htons (sizeof (struct RecordCreateResponseMessage));
+ rcr_msg.gns_header.r_id = htonl (rid);
+ if ((GNUNET_OK == res) && (crc.res == GNUNET_YES))
+ rcr_msg.op_result = htonl (GNUNET_YES);
+ else if ((GNUNET_OK == res) && (crc.res == GNUNET_NO))
+ rcr_msg.op_result = htonl (GNUNET_NO);
+ else
+ rcr_msg.op_result = htonl (GNUNET_SYSERR);
+ GNUNET_SERVER_notification_context_unicast (snc, nc->client, (const struct GNUNET_MessageHeader *) &rcr_msg, GNUNET_NO);
+
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+}
+
+
+/**
+ * RemoveRecordContext
+ *
+ * Context for record remove operations passed from 'handle_record_remove' to
+ * 'handle_record_remove_it' as closure
+ */
+struct RemoveRecordContext
+{
+ /**
+ * Record to remove
+ */
+ struct GNUNET_NAMESTORE_RecordData *rd;
+
+ /**
+ * Zone's private keys
+ */
+ struct GNUNET_CRYPTO_RsaPrivateKey *pkey;
+
+ /**
+ * Name to remove
+ */
+ int remove_name;
+
+ /**
+ * 0 : Success
+ * 1 : Could not find record to remove, empty result set
+ * 2 : Could not find record to remove, record did not exist in result set
+ * 3 : Could not remove records from database
+ * 4 : Could not put records into database
+ */
+ uint16_t op_res;
+};
+
+
+/**
+ * FIXME...
+ */
+static void
+handle_record_remove_it (void *cls,
+ const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
+ struct GNUNET_TIME_Absolute expire,
+ const char *name,
+ unsigned int rd_count,
+ const struct GNUNET_NAMESTORE_RecordData *rd,
+ const struct GNUNET_CRYPTO_RsaSignature *signature)
+{
+ struct RemoveRecordContext *rrc = cls;
+ unsigned int c;
+ int res;
+ int found;
+ unsigned int rd_count_new;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Name `%s 'currently has %u records\n", name, rd_count);
+
+ if (rd_count == 0)
+ {
+ /* Could not find record to remove */
+ rrc->op_res = 1;
+ return;
+ }
+
+ /* Find record to remove */
+ found = GNUNET_SYSERR;
+ for (c = 0; c < rd_count; c++)
+ {
+ /*
+ if (rd[c].flags != rrc->rd->flags)
+ continue;*/
+ if (rd[c].record_type != rrc->rd->record_type)
+ continue;
+ /*
+ if (rd[c].data_size != rrc->rd->data_size)
+ continue;
+ GNUNET_break(0);
+ if (0 != memcmp (rd[c].data, rrc->rd->data, rrc->rd->data_size))
+ continue;
+ GNUNET_break(0); */
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found record to remove!\n", rd_count);
+ found = c;
+ break;
+ }
+ if (GNUNET_SYSERR == found)
+ {
+ /* Could not find record to remove */
+ rrc->op_res = 2;
+ return;
+ }
+
+ if (rd_count-1 == 0)
+ {
+ struct GNUNET_CRYPTO_ShortHashCode pubkey_hash;
+ GNUNET_CRYPTO_short_hash (zone_key, sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded), &pubkey_hash);
+ res = GSN_database->remove_records (GSN_database->cls,
+ &pubkey_hash,
+ name);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "No records left for name `%s', removing name\n",
+ name, res);
+ if (GNUNET_OK != res)
+ {
+ /* Could not remove records from database */
+ rrc->op_res = 3;
+ return;
+ }
+ rrc->op_res = 0;
+ return;
+ }
+
+ rd_count_new = rd_count -1;
+ struct GNUNET_NAMESTORE_RecordData rd_new[rd_count_new];
+
+ unsigned int c2 = 0;
+ for (c = 0; c < rd_count; c++)
+ {
+ if (c != found)
+ {
+ GNUNET_assert (c2 < rd_count_new);
+ rd_new[c2] = rd[c];
+ c2++;
+ }
+ }
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Name `%s' now has %u records\n", name, rd_count_new);
+
+ /* Create dummy signature */
+ struct GNUNET_CRYPTO_RsaSignature dummy_signature;
+ memset (&dummy_signature, '\0', sizeof (dummy_signature));
+
+
+ /* Put records */
+ res = GSN_database->put_records(GSN_database->cls,
+ zone_key,
+ expire,
+ name,
+ rd_count_new, rd_new,
+ &dummy_signature);
+ if (GNUNET_OK != res)
+ {
+ /* Could not put records into database */
+ rrc->op_res = 4;
+ return;
+ }
+
+ rrc->op_res = 0;
+}
+
+
+/**
+ * Handles a 'GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_REMOVE' message
+ *
+ * @param cls unused
+ * @param client GNUNET_SERVER_Client sending the message
+ * @param message message of type 'struct RecordRemoveMessage'
+ */
+static void
+handle_record_remove (void *cls,
+ struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ struct GNUNET_NAMESTORE_Client *nc;
+ const struct RecordRemoveMessage *rr_msg;
+ struct RecordRemoveResponseMessage rrr_msg;
+ struct GNUNET_CRYPTO_RsaPrivateKey *pkey;
+ struct GNUNET_NAMESTORE_CryptoContainer *cc;
+ struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pub;
+ struct GNUNET_CRYPTO_ShortHashCode pubkey_hash;
+ struct GNUNET_HashCode long_hash;
+ const char *pkey_tmp;
+ const char *name_tmp;
+ const char *rd_ser;
+ size_t key_len;
+ size_t name_len;
+ size_t rd_ser_len;
+ size_t msg_size;
+ size_t msg_size_exp = 0;
+ uint32_t rd_count;
+ uint32_t rid;
+
+ int res = GNUNET_SYSERR;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "NAMESTORE_RECORD_REMOVE");
+ if (ntohs (message->size) < sizeof (struct RecordRemoveMessage))
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ nc = client_lookup(client);
+ if (nc == NULL)
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ rr_msg = (const struct RecordRemoveMessage *) message;
+ rid = ntohl (rr_msg->gns_header.r_id);
+ name_len = ntohs (rr_msg->name_len);
+ rd_ser_len = ntohs (rr_msg->rd_len);
+ rd_count = ntohs (rr_msg->rd_count);
+ key_len = ntohs (rr_msg->pkey_len);
+ msg_size = ntohs (message->size);
+
+ if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ if ((name_len >=256) || (name_len == 0))
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ msg_size_exp = sizeof (struct RecordRemoveMessage) + key_len + name_len + rd_ser_len;
+ if (msg_size != msg_size_exp)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Expected message %u size but message size is %u \n", msg_size_exp, msg_size);
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ pkey_tmp = (const char *) &rr_msg[1];
+ name_tmp = &pkey_tmp[key_len];
+ rd_ser = &name_tmp[name_len];
+
+
+ if ((name_len == 0) || (name_len > 256))
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ if (name_tmp[name_len -1] != '\0')
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ /* Extracting and converting private key */
+ pkey = GNUNET_CRYPTO_rsa_decode_key((char *) pkey_tmp, key_len);
+ GNUNET_assert (pkey != NULL);
+ GNUNET_CRYPTO_rsa_key_get_public(pkey, &pub);
+ GNUNET_CRYPTO_short_hash (&pub, sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded), &pubkey_hash);
+ GNUNET_CRYPTO_short_hash_double (&pubkey_hash, &long_hash);
+
+ if (GNUNET_NO == GNUNET_CONTAINER_multihashmap_contains(zonekeys, &long_hash))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received new private key for zone `%s'\n",
+ GNUNET_short_h2s(&pubkey_hash));
+ cc = GNUNET_malloc (sizeof (struct GNUNET_NAMESTORE_CryptoContainer));
+ cc->privkey = GNUNET_CRYPTO_rsa_decode_key((char *) pkey_tmp, key_len);
+ cc->pubkey = GNUNET_malloc(sizeof (pub));
+ memcpy (cc->pubkey, &pub, sizeof(pub));
+ cc->zone = pubkey_hash;
+
+ GNUNET_CONTAINER_multihashmap_put(zonekeys, &long_hash, cc, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
+ }
+
+
+ struct GNUNET_NAMESTORE_RecordData rd[rd_count];
+ res = GNUNET_NAMESTORE_records_deserialize(rd_ser_len, rd_ser, rd_count, rd);
+ if ((res != GNUNET_OK) || (rd_count > 1))
+ {
+ GNUNET_break_op (0);
+ goto send;
+ }
+
+ if (0 == rd_count)
+ {
+ /* remove the whole name and all records */
+ /* Database operation */
+ res = GSN_database->remove_records (GSN_database->cls,
+ &pubkey_hash,
+ name_tmp);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Removing name `%s': %s\n",
+ name_tmp, (GNUNET_OK == res) ? "OK" : "FAIL");
+
+ if (GNUNET_OK != res)
+ /* Could not remove entry from database */
+ res = 4;
+ else
+ res = 0;
+ }
+ else
+ {
+ /* remove a single record */
+ struct RemoveRecordContext rrc;
+ rrc.rd = rd;
+ rrc.pkey = pkey;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Removing record for name `%s' in zone `%s'\n", name_tmp, GNUNET_short_h2s(&pubkey_hash));
+
+ /* Database operation */
+ res = GSN_database->iterate_records (GSN_database->cls,
+ &pubkey_hash,
+ name_tmp,
+ 0,
+ handle_record_remove_it, &rrc);
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Removing record for name `%s': %s\n",
+ name_tmp, (rrc.op_res == 0) ? "OK" : "FAIL");
+ res = rrc.op_res;
+ }
+ /* Send response */
+send:
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message\n", "RECORD_REMOVE_RESPONSE");
+ rrr_msg.gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_REMOVE_RESPONSE);
+ rrr_msg.gns_header.header.size = htons (sizeof (struct RecordRemoveResponseMessage));
+ rrr_msg.gns_header.r_id = htonl (rid);
+ rrr_msg.op_result = htonl (res);
+ GNUNET_SERVER_notification_context_unicast (snc, nc->client, (const struct GNUNET_MessageHeader *) &rrr_msg, GNUNET_NO);
+
+ GNUNET_CRYPTO_rsa_key_free (pkey);
+
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+}
+
+/**
+ * ZoneToNameCtx
+ *
+ * Context for record remove operations passed from 'handle_zone_to_name' to
+ * 'handle_zone_to_name_it' as closure
+ */
+struct ZoneToNameCtx
+{
+ /**
+ * Namestore client
+ */
+ struct GNUNET_NAMESTORE_Client *nc;
+
+ /**
+ * Request id
+ */
+ uint32_t rid;
+};
+
+
+/**
+ * Zone to name iterator
+ *
+ * @param cls struct ZoneToNameCtx *
+ * @param zone_key the zone key
+ * @param expire expiration date
+ * @param name name
+ * @param rd_count number of records
+ * @param rd record data
+ * @param signature signature
+ */
+static void
+handle_zone_to_name_it (void *cls,
+ const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
+ struct GNUNET_TIME_Absolute expire,
+ const char *name,
+ unsigned int rd_count,
+ const struct GNUNET_NAMESTORE_RecordData *rd,
+ const struct GNUNET_CRYPTO_RsaSignature *signature)
+{
+ struct ZoneToNameCtx *ztn_ctx = cls;
+ struct ZoneToNameResponseMessage *ztnr_msg;
+ int16_t res = GNUNET_SYSERR;
+ uint16_t name_len = 0;
+ uint16_t rd_ser_len = 0 ;
+ int32_t contains_sig = 0;
+ size_t msg_size = 0;
+
+ char *rd_ser = NULL;
+ char *name_tmp;
+ char *rd_tmp;
+ char *sig_tmp;
+
+ if ((zone_key != NULL) && (name != NULL))
+ {
+ /* found result */
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found results: name is `%s', has %u records\n", name, rd_count);
+ res = GNUNET_YES;
+ name_len = strlen (name) +1;
+ }
+ else
+ {
+ /* no result found */
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found no results\n");
+ res = GNUNET_NO;
+ name_len = 0;
+ }
+
+ if (rd_count > 0)
+ {
+ rd_ser_len = GNUNET_NAMESTORE_records_get_size (rd_count, rd);
+ rd_ser = GNUNET_malloc (rd_ser_len);
+ GNUNET_NAMESTORE_records_serialize(rd_count, rd, rd_ser_len, rd_ser);
+ }
+ else
+ rd_ser_len = 0;
+
+ if (signature != NULL)
+ contains_sig = GNUNET_YES;
+ else
+ contains_sig = GNUNET_NO;
+
+ msg_size = sizeof (struct ZoneToNameResponseMessage) + name_len + rd_ser_len + contains_sig * sizeof (struct GNUNET_CRYPTO_RsaSignature);
+ ztnr_msg = GNUNET_malloc (msg_size);
+
+ name_tmp = (char *) &ztnr_msg[1];
+ rd_tmp = &name_tmp[name_len];
+ sig_tmp = &rd_tmp[rd_ser_len];
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message\n", "ZONE_TO_NAME_RESPONSE");
+ ztnr_msg->gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME_RESPONSE);
+ ztnr_msg->gns_header.header.size = htons (msg_size);
+ ztnr_msg->gns_header.r_id = htonl (ztn_ctx->rid);
+ ztnr_msg->res = htons (res);
+ ztnr_msg->rd_len = htons (rd_ser_len);
+ ztnr_msg->rd_count = htons (rd_count);
+ ztnr_msg->name_len = htons (name_len);
+ ztnr_msg->expire = GNUNET_TIME_absolute_hton(expire);
+ if (zone_key != NULL)
+ ztnr_msg->zone_key = *zone_key;
+ else
+ memset (&ztnr_msg->zone_key, '\0', sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
+
+ if ((name_len > 0) && (name != NULL))
+ memcpy (name_tmp, name, name_len);
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Name is `%s', has %u records, rd ser len %u msg_size %u\n", name, rd_count, rd_ser_len, msg_size);
+ if ((rd_ser_len > 0) && (rd_ser != NULL))
+ memcpy (rd_tmp, rd_ser, rd_ser_len);
+ if ((GNUNET_YES == contains_sig) && (signature != NULL))
+ memcpy (sig_tmp, signature, contains_sig * sizeof (struct GNUNET_CRYPTO_RsaSignature));
+
+ GNUNET_SERVER_notification_context_unicast (snc, ztn_ctx->nc->client, (const struct GNUNET_MessageHeader *) ztnr_msg, GNUNET_NO);
+ GNUNET_free (ztnr_msg);
+ GNUNET_free_non_null (rd_ser);
+}
+
+
+/**
+ * Handles a 'GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME' message
+ *
+ * @param cls unused
+ * @param client GNUNET_SERVER_Client sending the message
+ * @param message message of type 'struct ZoneToNameMessage'
+ */
+static void
+handle_zone_to_name (void *cls,
+ struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "ZONE_TO_NAME");
+ struct GNUNET_NAMESTORE_Client *nc;
+ struct ZoneToNameMessage *ztn_msg;
+ struct ZoneToNameCtx ztn_ctx;
+ size_t msg_size = 0;
+ uint32_t rid = 0;
+
+ if (ntohs (message->size) != sizeof (struct ZoneToNameMessage))
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ nc = client_lookup(client);
+ if (nc == NULL)
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ ztn_msg = (struct ZoneToNameMessage *) message;
+
+ if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+
+ rid = ntohl (ztn_msg->gns_header.r_id);
+
+ ztn_ctx.rid = rid;
+ ztn_ctx.nc = nc;
+
+ struct GNUNET_CRYPTO_ShortHashAsciiEncoded z_tmp;
+ GNUNET_CRYPTO_short_hash_to_enc(&ztn_msg->zone, &z_tmp);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Looking up name for zone `%s' in zone `%s'\n",
+ (char *) &z_tmp,
+ GNUNET_short_h2s (&ztn_msg->value_zone));
+
+ GSN_database->zone_to_name (GSN_database->cls, &ztn_msg->zone, &ztn_msg->value_zone, &handle_zone_to_name_it, &ztn_ctx);
+
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+}
+
+
+/**
+ * Copy record, data has to be free'd separetely
+ *
+ * @param src source record
+ * @param dest destination record
+ */
+static void
+copy_record (const struct GNUNET_NAMESTORE_RecordData *src, struct GNUNET_NAMESTORE_RecordData *dest)
+{
+ memcpy (dest, src, sizeof (struct GNUNET_NAMESTORE_RecordData));
+ dest->data = GNUNET_malloc (src->data_size);
+ memcpy ((void *) dest->data, src->data, src->data_size);
}
-static void handle_start ()
+
+/**
+ * ZoneIterationProcResult
+ *
+ * Context for record remove operations passed from
+ * 'find_next_zone_iteration_result' to 'zone_iteraterate_proc' as closure
+ */
+struct ZoneIterationProcResult
+{
+ /**
+ * The zone iteration handle
+ */
+ struct GNUNET_NAMESTORE_ZoneIteration *zi;
+
+ /**
+ * Iteration result: iteration done?
+ */
+ int res_iteration_finished;
+
+ /**
+ * Iteration result: number of records included
+ */
+ int records_included;
+
+ /**
+ * Iteration result: is a valid signature included?
+ */
+ int has_signature;
+
+ /**
+ * Name
+ */
+ char *name;
+
+ /**
+ * Zone hash
+ */
+ struct GNUNET_CRYPTO_ShortHashCode zone_hash;
+
+ /**
+ * Record data
+ */
+ struct GNUNET_NAMESTORE_RecordData *rd;
+
+ /**
+ * Zone's public key
+ */
+ struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded zone_key;
+
+ /**
+ * Signature
+ */
+ struct GNUNET_CRYPTO_RsaSignature signature;
+
+ /**
+ * Expiration date
+ */
+ struct GNUNET_TIME_Absolute expire;
+};
+
+
+/**
+ * Process results for zone iteration from database
+ *
+ * @param cls struct ZoneIterationProcResult *proc
+ * @param zone_key the zone key
+ * @param expire expiration time
+ * @param name name
+ * @param rd_count number of records for this name
+ * @param rd record data
+ * @param signature block signature
+ */
+static void
+zone_iteraterate_proc (void *cls,
+ const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
+ struct GNUNET_TIME_Absolute expire,
+ const char *name,
+ unsigned int rd_count,
+ const struct GNUNET_NAMESTORE_RecordData *rd,
+ const struct GNUNET_CRYPTO_RsaSignature *signature)
+{
+ struct ZoneIterationProcResult *proc = cls;
+ struct GNUNET_NAMESTORE_RecordData *rd_filtered;
+ struct GNUNET_CRYPTO_RsaSignature *new_signature;
+ struct GNUNET_NAMESTORE_CryptoContainer *cc;
+ struct GNUNET_CRYPTO_ShortHashCode hash;
+ struct GNUNET_HashCode long_hash;
+ struct GNUNET_TIME_Absolute e;
+ unsigned int rd_count_filtered = 0;
+ int include;
+ int c;
+
+ proc->res_iteration_finished = GNUNET_NO;
+ proc->records_included = 0;
+
+ if ((zone_key == NULL) && (name == NULL))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Iteration done\n");
+ proc->res_iteration_finished = GNUNET_YES;
+ proc->rd = NULL;
+ proc->name = NULL;
+ }
+ else if ((zone_key != NULL) && (name != NULL)) /* just a safety check */
+ {
+ rd_filtered = GNUNET_malloc (rd_count * sizeof (struct GNUNET_NAMESTORE_RecordData));
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received result for zone iteration: `%s'\n", name);
+ for (c = 0; c < rd_count; c++)
+ {
+ include = GNUNET_YES;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Record %i has flags: 0x%x must have 0x%x \n",
+ c, rd[c].flags, proc->zi->must_have_flags);
+ /* Checking must have flags */
+ if ((rd[c].flags & proc->zi->must_have_flags) == proc->zi->must_have_flags)
+ {
+ /* Include */
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Record %i has flags: Include \n", c);
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Record %i has flags: Not include \n", c);
+ include = GNUNET_NO;
+ }
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Record %i has flags: 0x%x must not have 0x%x\n",
+ c, rd[c].flags, proc->zi->must_not_have_flags);
+ if ((rd[c].flags & proc->zi->must_not_have_flags) != 0)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Record %i has flags: Not include \n", c);
+ include = GNUNET_NO;
+ }
+ else
+ {
+ /* Include */
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Record %i has flags: Include \n", c);
+ }
+ if (GNUNET_YES == include)
+ {
+ copy_record (&rd[c], &rd_filtered[rd_count_filtered]);
+ rd_count_filtered++;
+ }
+
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Included %i of %i records \n", rd_count_filtered, rd_count);
+
+ proc->records_included = rd_count_filtered;
+ if (0 == rd_count_filtered)
+ {
+ GNUNET_free (rd_filtered);
+ rd_filtered = NULL;
+ }
+ proc->rd = rd_filtered;
+ proc->name = GNUNET_strdup(name);
+ memcpy (&proc->zone_key, zone_key, sizeof (proc->zone_key));
+
+ /* Signature */
+ proc->has_signature = GNUNET_NO;
+ GNUNET_CRYPTO_short_hash (zone_key, sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded), &hash);
+ GNUNET_CRYPTO_short_hash_double(&hash, &long_hash);
+ proc->zone_hash = hash;
+
+ if (GNUNET_CONTAINER_multihashmap_contains(zonekeys, &long_hash))
+ {
+ cc = GNUNET_CONTAINER_multihashmap_get(zonekeys, &long_hash);
+ e = get_block_expiration_time(rd_count_filtered, rd_filtered);
+ proc->expire = e;
+ new_signature = GNUNET_NAMESTORE_create_signature(cc->privkey, e, name, rd_filtered, rd_count_filtered);
+ GNUNET_assert (signature != NULL);
+ proc->signature = (*new_signature);
+ GNUNET_free (new_signature);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Creating signature for `%s' in zone `%s' with %u records and expiration %llu\n",
+ name, GNUNET_short_h2s(&hash), rd_count_filtered, e.abs_value);
+ proc->has_signature = GNUNET_YES;
+ }
+ else if (rd_count_filtered == rd_count)
+ {
+ proc->expire = expire;
+ if (NULL != signature)
+ {
+ proc->signature = (*signature);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Using provided signature for `%s' in zone `%s' with %u records and expiration %llu\n",
+ name, GNUNET_short_h2s(&hash), rd_count_filtered, expire.abs_value);
+ proc->has_signature = GNUNET_YES;
+ }
+ else
+ {
+ memset (&proc->signature, '\0', sizeof (proc->signature));
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "No signature provided for `%s'\n", name);
+ }
+ }
+ }
+ else
+ {
+ GNUNET_break (0);
+ return;
+ }
+}
+
+
+/**
+ * Find next zone iteration result in database
+ * @param proc the zone iteration processing to use
+ */
+static void
+find_next_zone_iteration_result (struct ZoneIterationProcResult *proc)
+{
+
+ struct GNUNET_CRYPTO_ShortHashCode *zone;
+
+ if (GNUNET_YES == proc->zi->has_zone)
+ zone = &proc->zi->zone;
+ else
+ zone = NULL;
+
+ do
+ {
+ if (GNUNET_SYSERR ==
+ GSN_database->iterate_records (GSN_database->cls, zone, NULL, proc->zi->offset, &zone_iteraterate_proc, proc))
+ {
+ GNUNET_break (0);
+ break;
+ }
+ proc->zi->offset++;
+ }
+ while ((0 == proc->records_included) && (GNUNET_NO == proc->res_iteration_finished));
+}
+
+
+/**
+ * Send zone iteration result to client
+ * @param proc the zone iteration processing result to send
+ */
+static void
+send_zone_iteration_result (struct ZoneIterationProcResult *proc)
+{
+ struct GNUNET_NAMESTORE_ZoneIteration *zi = proc->zi;
+
+ if (GNUNET_YES == proc->res_iteration_finished)
+ {
+ struct ZoneIterationResponseMessage zir_msg;
+ if (zi->has_zone == GNUNET_YES)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "No more results for zone `%s'\n", GNUNET_short_h2s(&zi->zone));
+ else
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "No more results for all zones\n");
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending empty `%s' message\n", "ZONE_ITERATION_RESPONSE");
+ zir_msg.gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_RESPONSE);
+ zir_msg.gns_header.header.size = htons (sizeof (struct ZoneIterationResponseMessage));
+ zir_msg.gns_header.r_id = htonl(zi->request_id);
+ zir_msg.expire = GNUNET_TIME_absolute_hton(GNUNET_TIME_UNIT_ZERO_ABS);
+ zir_msg.name_len = htons (0);
+ zir_msg.reserved = htons (0);
+ zir_msg.rd_count = htons (0);
+ zir_msg.rd_len = htons (0);
+ memset (&zir_msg.public_key, '\0', sizeof (zir_msg.public_key));
+ memset (&zir_msg.signature, '\0', sizeof (zir_msg.signature));
+ GNUNET_SERVER_notification_context_unicast (snc, zi->client->client, (const struct GNUNET_MessageHeader *) &zir_msg, GNUNET_NO);
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Removing zone iterator\n");
+ GNUNET_CONTAINER_DLL_remove (zi->client->op_head, zi->client->op_tail, zi);
+ GNUNET_free (zi);
+ return;
+ }
+
+ GNUNET_assert (proc->records_included > 0);
+
+ struct ZoneIterationResponseMessage *zir_msg;
+ size_t name_len;
+ size_t rd_ser_len;
+ size_t msg_size;
+ char *name_tmp;
+ char *rd_tmp;
+
+ if (zi->has_zone == GNUNET_YES)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending name `%s' for iteration over zone `%s'\n",
+ proc->name, GNUNET_short_h2s(&zi->zone));
+ if (zi->has_zone == GNUNET_NO)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending name `%s' for iteration over all zones\n",
+ proc->name);
+ name_len = strlen (proc->name) +1;
+ rd_ser_len = GNUNET_NAMESTORE_records_get_size(proc->records_included, proc->rd);
+ char rd_ser[rd_ser_len];
+ GNUNET_NAMESTORE_records_serialize(proc->records_included, proc->rd, rd_ser_len, rd_ser);
+ msg_size = sizeof (struct ZoneIterationResponseMessage) + name_len + rd_ser_len;
+ zir_msg = GNUNET_malloc(msg_size);
+ name_tmp = (char *) &zir_msg[1];
+ rd_tmp = &name_tmp[name_len];
+ zir_msg->gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_RESPONSE);
+ zir_msg->gns_header.header.size = htons (msg_size);
+ zir_msg->gns_header.r_id = htonl(zi->request_id);
+ zir_msg->expire = GNUNET_TIME_absolute_hton(proc->expire);
+ zir_msg->reserved = htons (0);
+ zir_msg->name_len = htons (name_len);
+ zir_msg->rd_count = htons (proc->records_included);
+ zir_msg->rd_len = htons (rd_ser_len);
+ zir_msg->signature = proc->signature;
+ zir_msg->public_key = proc->zone_key;
+ memcpy (name_tmp, proc->name, name_len);
+ memcpy (rd_tmp, rd_ser, rd_ser_len);
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending `%s' message with size %u\n", "ZONE_ITERATION_RESPONSE", msg_size);
+ GNUNET_SERVER_notification_context_unicast (snc, zi->client->client,
+ (const struct GNUNET_MessageHeader *) zir_msg,
+ GNUNET_NO);
+ GNUNET_free (zir_msg);
+}
+
+
+/**
+ * Clean up after zone iteration
+ * @param proc the zone iteration processor
+ */
+static void
+clean_up_zone_iteration_result (struct ZoneIterationProcResult *proc)
+{
+ unsigned int c;
+
+ GNUNET_free_non_null (proc->name);
+ for (c = 0; c < proc->records_included; c++)
+ {
+ GNUNET_free ((void *) proc->rd[c].data);
+ }
+ GNUNET_free_non_null (proc->rd);
+ proc->name = NULL;
+ proc->rd = NULL;
+}
+
+
+/**
+ * Perform the next round of the zone iteration.
+ *
+ * @param zi zone iterator to process
+ */
+static void
+run_zone_iteration_round (struct GNUNET_NAMESTORE_ZoneIteration *zi)
+{
+ struct ZoneIterationProcResult proc;
+
+ memset (&proc, 0, sizeof (proc));
+ proc.zi = zi;
+ find_next_zone_iteration_result (&proc);
+ if (GNUNET_YES == proc.res_iteration_finished)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Zone iteration done\n");
+ }
+ else if (0 != proc.records_included)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Zone iteration return %u records\n",
+ proc.records_included);
+ }
+ send_zone_iteration_result (&proc);
+ clean_up_zone_iteration_result (&proc);
+}
+
+
+/**
+ * Handles a 'GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_START' message
+ *
+ * @param cls unused
+ * @param client GNUNET_SERVER_Client sending the message
+ * @param message message of type 'struct ZoneIterationStartMessage'
+ */
+static void
+handle_iteration_start (void *cls,
+ struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ static struct GNUNET_CRYPTO_ShortHashCode zeros;
+ const struct ZoneIterationStartMessage *zis_msg;
+ struct GNUNET_NAMESTORE_Client *nc;
+ struct GNUNET_NAMESTORE_ZoneIteration *zi;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "ZONE_ITERATION_START");
+ nc = client_lookup (client);
+ if (NULL == nc)
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+ zis_msg = (const struct ZoneIterationStartMessage *) message;
+ zi = GNUNET_malloc (sizeof (struct GNUNET_NAMESTORE_ZoneIteration));
+ zi->request_id = ntohl (zis_msg->gns_header.r_id);
+ zi->offset = 0;
+ zi->client = nc;
+ zi->must_have_flags = ntohs (zis_msg->must_have_flags);
+ zi->must_not_have_flags = ntohs (zis_msg->must_not_have_flags);
+ if (0 == memcmp (&zeros, &zis_msg->zone, sizeof (zeros)))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Starting to iterate over all zones\n");
+ zi->zone = zis_msg->zone;
+ zi->has_zone = GNUNET_NO;
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Starting to iterate over zone `%s'\n", GNUNET_short_h2s (&zis_msg->zone));
+ zi->zone = zis_msg->zone;
+ zi->has_zone = GNUNET_YES;
+ }
+ GNUNET_CONTAINER_DLL_insert (nc->op_head, nc->op_tail, zi);
+ run_zone_iteration_round (zi);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+}
+
+
+/**
+ * Handles a 'GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_STOP' message
+ *
+ * @param cls unused
+ * @param client GNUNET_SERVER_Client sending the message
+ * @param message message of type 'struct ZoneIterationStopMessage'
+ */
+static void
+handle_iteration_stop (void *cls,
+ struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ struct GNUNET_NAMESTORE_Client *nc;
+ struct GNUNET_NAMESTORE_ZoneIteration *zi;
+ struct ZoneIterationStopMessage *zis_msg;
+ uint32_t rid;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received `%s' message\n",
+ "ZONE_ITERATION_STOP");
+ nc = client_lookup(client);
+ if (NULL == nc)
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+ zis_msg = (struct ZoneIterationStopMessage *) message;
+ rid = ntohl (zis_msg->gns_header.r_id);
+ for (zi = nc->op_head; NULL != zi; zi = zi->next)
+ if (zi->request_id == rid)
+ break;
+ if (NULL == zi)
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+ GNUNET_CONTAINER_DLL_remove (nc->op_head, nc->op_tail, zi);
+ if (GNUNET_YES == zi->has_zone)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Stopped zone iteration for zone `%s'\n",
+ GNUNET_short_h2s (&zi->zone));
+ else
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Stopped zone iteration over all zones\n");
+ GNUNET_free (zi);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+}
+
+
+/**
+ * Handles a 'GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_NEXT' message
+ *
+ * @param cls unused
+ * @param client GNUNET_SERVER_Client sending the message
+ * @param message message of type 'struct ZoneIterationNextMessage'
+ */
+static void
+handle_iteration_next (void *cls,
+ struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
{
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "START");
+ struct GNUNET_NAMESTORE_Client *nc;
+ struct GNUNET_NAMESTORE_ZoneIteration *zi;
+ const struct ZoneIterationNextMessage *zis_msg;
+ uint32_t rid;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "ZONE_ITERATION_NEXT");
+ nc = client_lookup(client);
+ if (NULL == nc)
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+ zis_msg = (const struct ZoneIterationNextMessage *) message;
+ rid = ntohl (zis_msg->gns_header.r_id);
+ for (zi = nc->op_head; NULL != zi; zi = zi->next)
+ if (zi->request_id == rid)
+ break;
+ if (NULL == zi)
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
+ run_zone_iteration_round (zi);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
}
/**
- * Process template requests.
+ * Load zone keys from directory by reading all .zkey files in this directory
+ *
+ * @param cls int * 'counter' to store the number of files found
+ * @param filename directory to scan
+ * @return GNUNET_OK to continue
+ */
+static int
+zonekey_file_it (void *cls, const char *filename)
+{
+ unsigned int *counter = cls;
+ struct GNUNET_HashCode long_hash;
+ struct GNUNET_CRYPTO_RsaPrivateKey *privkey;
+ struct GNUNET_NAMESTORE_CryptoContainer *c;
+
+ if ((NULL == filename) ||
+ (NULL == strstr(filename, ".zkey")))
+ return GNUNET_OK;
+ privkey = GNUNET_CRYPTO_rsa_key_create_from_file (filename);
+ if (NULL == privkey)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ _("Could not parse zone key file `%s'\n"),
+ filename);
+ return GNUNET_OK;
+ }
+ c = GNUNET_malloc (sizeof (struct GNUNET_NAMESTORE_CryptoContainer));
+ c->pubkey = GNUNET_malloc(sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
+ c->privkey = privkey;
+ GNUNET_CRYPTO_rsa_key_get_public(privkey, c->pubkey);
+ GNUNET_CRYPTO_short_hash(c->pubkey,
+ sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
+ &c->zone);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Found zonefile for zone `%s'\n", GNUNET_short_h2s (&c->zone));
+ GNUNET_CRYPTO_short_hash_double (&c->zone, &long_hash);
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_CONTAINER_multihashmap_put (zonekeys, &long_hash, c,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
+ (*counter)++;
+ return GNUNET_OK;
+}
+
+
+/**
+ * Process namestore requests.
*
* @param cls closure
* @param server the initialized server
run (void *cls, struct GNUNET_SERVER_Handle *server,
const struct GNUNET_CONFIGURATION_Handle *cfg)
{
- char * database;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Starting namestore service\n");
-
static const struct GNUNET_SERVER_MessageHandler handlers[] = {
{&handle_start, NULL,
GNUNET_MESSAGE_TYPE_NAMESTORE_START, sizeof (struct StartMessage)},
+ {&handle_lookup_name, NULL,
+ GNUNET_MESSAGE_TYPE_NAMESTORE_LOOKUP_NAME, 0},
+ {&handle_record_put, NULL,
+ GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_PUT, 0},
+ {&handle_record_create, NULL,
+ GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_CREATE, 0},
+ {&handle_record_remove, NULL,
+ GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_REMOVE, 0},
+ {&handle_zone_to_name, NULL,
+ GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME, 0},
+ {&handle_iteration_start, NULL,
+ GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_START, sizeof (struct ZoneIterationStartMessage)},
+ {&handle_iteration_next, NULL,
+ GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_NEXT, 0},
+ {&handle_iteration_stop, NULL,
+ GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_STOP, 0},
{NULL, NULL, 0, 0}
};
+ char *database;
+ unsigned int counter;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Starting namestore service\n");
GSN_cfg = cfg;
+ /* Load private keys from disk */
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_filename (cfg, "namestore",
+ "zonefile_directory",
+ &zonefile_directory))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("No directory to load zonefiles specified in configuration\n"));
+ GNUNET_SCHEDULER_add_now (&cleanup_task, NULL);
+ return;
+ }
+
+ if (GNUNET_NO == GNUNET_DISK_file_test (zonefile_directory))
+ {
+ if (GNUNET_SYSERR == GNUNET_DISK_directory_create (zonefile_directory))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Creating directory `%s' for zone files failed!\n"),
+ zonefile_directory);
+ GNUNET_SCHEDULER_add_now (&cleanup_task, NULL);
+ return;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Created directory `%s' for zone files\n",
+ zonefile_directory);
+ }
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Scanning directory `%s' for zone files\n", zonefile_directory);
+ zonekeys = GNUNET_CONTAINER_multihashmap_create (16);
+ counter = 0;
+ GNUNET_DISK_directory_scan (zonefile_directory, zonekey_file_it, &counter);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Found %u zone files\n",
+ counter);
+
/* Loading database plugin */
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_string (cfg, "namestore", "database",
GNUNET_asprintf (&db_lib_name, "libgnunet_plugin_namestore_%s", database);
GSN_database = GNUNET_PLUGIN_load (db_lib_name, (void *) GSN_cfg);
- if (GSN_database == NULL)
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Could not load database backend `%s'\n",
- db_lib_name);
GNUNET_free (database);
+ if (NULL == GSN_database)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Could not load database backend `%s'\n",
+ db_lib_name);
+ GNUNET_SCHEDULER_add_now (&cleanup_task, NULL);
+ return;
+ }
/* Configuring server handles */
GNUNET_SERVER_add_handlers (server, handlers);
-
+ snc = GNUNET_SERVER_notification_context_create (server, 16);
+ GNUNET_SERVER_disconnect_notify (server,
+ &client_disconnect_notification,
+ NULL);
GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &cleanup_task,
NULL);
-
}
}
/* end of gnunet-service-namestore.c */
+
projects / oweals / gnunet.git / blobdiff