2 This file is part of GNUnet
3 Copyright (C) 2012-2013 GNUnet e.V.
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 Boston, MA 02110-1301, USA.
21 * @file peerstore/peerstore_common.c
22 * @brief Helper peerstore functions
23 * @author Omar Tarabai
26 #include "peerstore_common.h"
29 * Creates a hash of the given key combination
33 PEERSTORE_hash_key (const char *sub_system,
34 const struct GNUNET_PeerIdentity *peer,
36 struct GNUNET_HashCode *ret)
45 sssize = strlen (sub_system) + 1;
46 psize = sizeof (struct GNUNET_PeerIdentity);
47 ksize = strlen (key) + 1;
48 totalsize = sssize + psize + ksize;
49 block = GNUNET_malloc (totalsize);
51 GNUNET_memcpy (blockptr, sub_system, sssize);
53 GNUNET_memcpy (blockptr, peer, psize);
55 GNUNET_memcpy (blockptr, key, ksize);
56 GNUNET_CRYPTO_hash (block, totalsize, ret);
62 * Creates a MQ envelope for a single record
64 * @param sub_system sub system string
65 * @param peer Peer identity (can be NULL)
66 * @param key record key string (can be NULL)
67 * @param value record value BLOB (can be NULL)
68 * @param value_size record value size in bytes (set to 0 if value is NULL)
69 * @param expiry time after which the record expires
70 * @param options options specific to the storage operation
71 * @param msg_type message type to be set in header
72 * @return pointer to record message struct
74 struct GNUNET_MQ_Envelope *
75 PEERSTORE_create_record_mq_envelope (const char *sub_system,
76 const struct GNUNET_PeerIdentity *peer,
80 struct GNUNET_TIME_Absolute expiry,
81 enum GNUNET_PEERSTORE_StoreOption options,
84 struct StoreRecordMessage *srm;
85 struct GNUNET_MQ_Envelope *ev;
91 GNUNET_assert (NULL != sub_system);
92 ss_size = strlen (sub_system) + 1;
96 key_size = strlen (key) + 1;
97 msg_size = ss_size + key_size + value_size;
98 ev = GNUNET_MQ_msg_extra (srm, msg_size, msg_type);
99 srm->key_size = htons (key_size);
100 srm->expiry = GNUNET_TIME_absolute_hton (expiry);
102 srm->peer_set = htons (GNUNET_NO);
105 srm->peer_set = htons (GNUNET_YES);
108 srm->sub_system_size = htons (ss_size);
109 srm->value_size = htons (value_size);
110 srm->options = htonl (options);
112 GNUNET_memcpy (dummy, sub_system, ss_size);
114 GNUNET_memcpy (dummy, key, key_size);
116 GNUNET_memcpy (dummy, value, value_size);
122 * Parses a message carrying a record
124 * @param srm the actual message
125 * @return Pointer to record or NULL if error
127 struct GNUNET_PEERSTORE_Record *
128 PEERSTORE_parse_record_message (const struct StoreRecordMessage *srm)
130 struct GNUNET_PEERSTORE_Record *record;
137 req_size = ntohs (srm->header.size) - sizeof (*srm);
138 ss_size = ntohs (srm->sub_system_size);
139 key_size = ntohs (srm->key_size);
140 value_size = ntohs (srm->value_size);
141 if (ss_size + key_size + value_size != req_size)
146 record = GNUNET_new (struct GNUNET_PEERSTORE_Record);
147 if (GNUNET_YES == ntohs (srm->peer_set))
149 record->peer = srm->peer;
151 record->expiry = GNUNET_TIME_absolute_ntoh (srm->expiry);
152 dummy = (char *) &srm[1];
155 record->sub_system = GNUNET_strdup (dummy);
160 record->key = GNUNET_strdup (dummy);
165 record->value = GNUNET_malloc (value_size);
166 GNUNET_memcpy (record->value,
170 record->value_size = value_size;
176 * Free any memory allocated for this record
181 PEERSTORE_destroy_record (struct GNUNET_PEERSTORE_Record *record)
183 if (NULL != record->sub_system)
184 GNUNET_free (record->sub_system);
185 if (NULL != record->key)
186 GNUNET_free (record->key);
187 if (NULL != record->value)
189 GNUNET_free (record->value);
192 GNUNET_free (record);