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 it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your 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 Affero General Public License for more details.
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
19 * @file peerstore/peerstore_common.c
20 * @brief Helper peerstore functions
21 * @author Omar Tarabai
24 #include "peerstore_common.h"
27 * Creates a hash of the given key combination
31 PEERSTORE_hash_key (const char *sub_system,
32 const struct GNUNET_PeerIdentity *peer,
34 struct GNUNET_HashCode *ret)
43 sssize = strlen (sub_system) + 1;
44 psize = sizeof (struct GNUNET_PeerIdentity);
45 ksize = strlen (key) + 1;
46 totalsize = sssize + psize + ksize;
47 block = GNUNET_malloc (totalsize);
49 GNUNET_memcpy (blockptr, sub_system, sssize);
51 GNUNET_memcpy (blockptr, peer, psize);
53 GNUNET_memcpy (blockptr, key, ksize);
54 GNUNET_CRYPTO_hash (block, totalsize, ret);
60 * Creates a MQ envelope for a single record
62 * @param sub_system sub system string
63 * @param peer Peer identity (can be NULL)
64 * @param key record key string (can be NULL)
65 * @param value record value BLOB (can be NULL)
66 * @param value_size record value size in bytes (set to 0 if value is NULL)
67 * @param expiry time after which the record expires
68 * @param options options specific to the storage operation
69 * @param msg_type message type to be set in header
70 * @return pointer to record message struct
72 struct GNUNET_MQ_Envelope *
73 PEERSTORE_create_record_mq_envelope (const char *sub_system,
74 const struct GNUNET_PeerIdentity *peer,
78 struct GNUNET_TIME_Absolute expiry,
79 enum GNUNET_PEERSTORE_StoreOption options,
82 struct StoreRecordMessage *srm;
83 struct GNUNET_MQ_Envelope *ev;
89 GNUNET_assert (NULL != sub_system);
90 ss_size = strlen (sub_system) + 1;
94 key_size = strlen (key) + 1;
95 msg_size = ss_size + key_size + value_size;
96 ev = GNUNET_MQ_msg_extra (srm, msg_size, msg_type);
97 srm->key_size = htons (key_size);
98 srm->expiry = GNUNET_TIME_absolute_hton (expiry);
100 srm->peer_set = htons (GNUNET_NO);
103 srm->peer_set = htons (GNUNET_YES);
106 srm->sub_system_size = htons (ss_size);
107 srm->value_size = htons (value_size);
108 srm->options = htonl (options);
110 GNUNET_memcpy (dummy, sub_system, ss_size);
112 GNUNET_memcpy (dummy, key, key_size);
114 GNUNET_memcpy (dummy, value, value_size);
120 * Parses a message carrying a record
122 * @param srm the actual message
123 * @return Pointer to record or NULL if error
125 struct GNUNET_PEERSTORE_Record *
126 PEERSTORE_parse_record_message (const struct StoreRecordMessage *srm)
128 struct GNUNET_PEERSTORE_Record *record;
135 req_size = ntohs (srm->header.size) - sizeof (*srm);
136 ss_size = ntohs (srm->sub_system_size);
137 key_size = ntohs (srm->key_size);
138 value_size = ntohs (srm->value_size);
139 if (ss_size + key_size + value_size != req_size)
144 record = GNUNET_new (struct GNUNET_PEERSTORE_Record);
145 if (GNUNET_YES == ntohs (srm->peer_set))
147 record->peer = srm->peer;
149 record->expiry = GNUNET_TIME_absolute_ntoh (srm->expiry);
150 dummy = (char *) &srm[1];
153 record->sub_system = GNUNET_strdup (dummy);
158 record->key = GNUNET_strdup (dummy);
163 record->value = GNUNET_malloc (value_size);
164 GNUNET_memcpy (record->value,
168 record->value_size = value_size;
174 * Free any memory allocated for this record
179 PEERSTORE_destroy_record (struct GNUNET_PEERSTORE_Record *record)
181 if (NULL != record->sub_system)
182 GNUNET_free (record->sub_system);
183 if (NULL != record->key)
184 GNUNET_free (record->key);
185 if (NULL != record->value)
187 GNUNET_free (record->value);
190 GNUNET_free (record);