5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2002 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
22 #include "serverincludes.h"
23 #include "server_internal.h"
25 /* Creates a Server ID. Newly created Server ID is returned to the
28 void silc_id_create_server_id(const char *ip, SilcUInt16 port, SilcRng rng,
29 SilcServerID **new_id)
31 SILC_LOG_DEBUG(("Creating new Server ID"));
33 *new_id = silc_calloc(1, sizeof(**new_id));
37 if (!silc_net_addr2bin(ip, (*new_id)->ip.data,
38 sizeof((*new_id)->ip.data))) {
44 (*new_id)->ip.data_len = silc_net_is_ip4(ip) ? 4 : 16;
45 (*new_id)->port = SILC_SWAB_16(port);
46 (*new_id)->rnd = silc_rng_get_rn16(rng);
48 SILC_LOG_DEBUG(("New ID (%s)", silc_id_render(*new_id, SILC_ID_SERVER)));
51 /* Creates Client ID. This assures that there are no collisions in the
52 created Client IDs. If the collision would occur (meaning that there
53 are 2^8 occurences of the `nickname' this will return FALSE, and the
54 caller must recall the function with different nickname. If this returns
55 TRUE the new ID was created successfully. */
57 bool silc_id_create_client_id(SilcServer server,
58 SilcServerID *server_id, SilcRng rng,
59 SilcHash md5hash, char *nickname,
60 SilcClientID **new_id)
62 unsigned char hash[16];
66 SILC_LOG_DEBUG(("Creating new Client ID"));
68 *new_id = silc_calloc(1, sizeof(**new_id));
70 /* Create hash of the nickanem */
71 memset(nick, 0, sizeof(nick));
72 silc_to_lower(nickname, nick, sizeof(nick) - 1);
73 silc_hash_make(md5hash, nick, strlen(nick), hash);
76 memcpy((*new_id)->ip.data, server_id->ip.data, server_id->ip.data_len);
77 (*new_id)->ip.data_len = server_id->ip.data_len;
78 (*new_id)->rnd = silc_rng_get_byte(rng);
79 memcpy((*new_id)->hash, hash, CLIENTID_HASH_LEN);
81 /* Assure that the ID does not exist already */
83 if (!silc_idlist_find_client_by_id(server->local_list,
84 *new_id, FALSE, NULL))
85 if (!silc_idlist_find_client_by_id(server->global_list,
86 *new_id, FALSE, NULL))
89 /* The ID exists, start increasing the rnd from 0 until we find a
90 ID that does not exist. If we wrap and it still exists then we
91 will return FALSE and the caller must send some other nickname
92 since this cannot be used anymore. */
95 if (finding && (*new_id)->rnd == 0)
104 SILC_LOG_DEBUG(("New ID (%s)", silc_id_render(*new_id, SILC_ID_CLIENT)));
109 /* Creates Channel ID */
111 bool silc_id_create_channel_id(SilcServer server,
112 SilcServerID *router_id, SilcRng rng,
113 SilcChannelID **new_id)
117 SILC_LOG_DEBUG(("Creating new Channel ID"));
119 *new_id = silc_calloc(1, sizeof(**new_id));
122 memcpy((*new_id)->ip.data, router_id->ip.data, router_id->ip.data_len);
123 (*new_id)->ip.data_len = router_id->ip.data_len;
124 (*new_id)->port = router_id->port;
125 (*new_id)->rnd = silc_rng_get_rn16(rng);
127 /* Assure that the ID does not exist already */
129 if (!silc_idlist_find_channel_by_id(server->local_list,
135 if (finding && (*new_id)->rnd == 0)
144 SILC_LOG_DEBUG(("New ID (%s)", silc_id_render(*new_id, SILC_ID_CHANNEL)));
149 /* Checks whether the `server_id' is valid. It must be based to the
150 IP address provided in the `remote' socket connection. */
152 bool silc_id_is_valid_server_id(SilcServer server,
153 SilcServerID *server_id,
154 SilcSocketConnection remote)
156 unsigned char ip[16];
158 if (!silc_net_addr2bin(remote->ip, ip, sizeof(ip)))
161 if (silc_net_is_ip4(remote->ip)) {
162 if (!memcmp(server_id->ip.data, ip, 4))
165 if (!memcmp(server_id->ip.data, ip, 16))