2 This file is part of GNUnet
3 (C) 2012-2013 Christian Grothoff (and other contributing authors)
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., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
21 * @file peerstore/peerstore_common.c
22 * @brief Helper peerstore functions
23 * @author Omar Tarabai
26 #include "peerstore_common.h"
29 * Creates a record message ready to be sent
31 * @param sub_system sub system string
32 * @param peer Peer identity (can be NULL)
33 * @param key record key string (can be NULL)
34 * @param value record value BLOB (can be NULL)
35 * @param value_size record value size in bytes (set to 0 if value is NULL)
36 * @param lifetime relative time after which the record expires
37 * @return pointer to record message struct
39 struct StoreRecordMessage *
40 PEERSTORE_create_record_message(const char *sub_system,
41 const struct GNUNET_PeerIdentity *peer,
45 struct GNUNET_TIME_Relative lifetime)
47 struct StoreRecordMessage *srm;
53 ss_size = strlen(sub_system) + 1;
57 key_size = strlen(key) + 1;
58 request_size = sizeof(struct StoreRecordMessage) +
62 srm = GNUNET_malloc(request_size);
63 srm->header.size = htons(request_size);
64 srm->header.type = htons(GNUNET_MESSAGE_TYPE_PEERSTORE_STORE);
65 srm->key_size = htons(key_size);
66 srm->lifetime = lifetime;
68 srm->peer_set = htons(GNUNET_NO);
71 srm->peer_set = htons(GNUNET_YES);
74 srm->sub_system_size = htons(ss_size);
75 srm->value_size = htons(value_size);
77 memcpy(dummy, sub_system, ss_size);
79 memcpy(dummy, key, key_size);
81 memcpy(dummy, value, value_size);
87 * Parses a message carrying a record
89 * @param message the actual message
90 * @return Pointer to record or NULL if error
92 struct GNUNET_PEERSTORE_Record *
93 PEERSTORE_parse_record_message(const struct GNUNET_MessageHeader *message)
95 struct StoreRecordMessage *srm;
96 struct GNUNET_PEERSTORE_Record *record;
103 req_size = ntohs(message->size);
104 if(req_size < sizeof(struct StoreRecordMessage))
106 srm = (struct StoreRecordMessage *)message;
107 ss_size = ntohs(srm->sub_system_size);
108 key_size = ntohs(srm->key_size);
109 value_size = ntohs(srm->value_size);
110 if(ss_size + key_size + value_size + sizeof(struct StoreRecordMessage)
113 record = GNUNET_new(struct GNUNET_PEERSTORE_Record);
114 if(GNUNET_YES == ntohs(srm->peer_set))
116 record->peer = GNUNET_new(struct GNUNET_PeerIdentity);
117 memcpy(record->peer, &srm->peer, sizeof(struct GNUNET_PeerIdentity));
119 record->lifetime = srm->lifetime;
120 dummy = (char *)&srm[1];
123 record->sub_system = GNUNET_strdup(dummy);
128 record->key = GNUNET_strdup(dummy);
133 record->value = GNUNET_malloc(value_size);
134 memcpy(record->value, dummy, value_size);
136 record->value_size = value_size;