+++ /dev/null
-/*
-
- serverid.c
-
- Author: Pekka Riikonen <priikone@silcnet.org>
-
- Copyright (C) 1997 - 2007 Pekka Riikonen
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
-*/
-/* $Id$ */
-
-#include "serverincludes.h"
-#include "server_internal.h"
-
-/* Creates a Server ID. Newly created Server ID is returned to the
- new_id argument. */
-
-void silc_id_create_server_id(const char *ip, SilcUInt16 port, SilcRng rng,
- SilcServerID **new_id)
-{
- SILC_LOG_DEBUG(("Creating new Server ID"));
-
- *new_id = silc_calloc(1, sizeof(**new_id));
-
- /* Create the ID */
-
- if (!silc_net_addr2bin(ip, (*new_id)->ip.data,
- sizeof((*new_id)->ip.data))) {
- silc_free(*new_id);
- *new_id = NULL;
- return;
- }
-
- (*new_id)->ip.data_len = silc_net_is_ip4(ip) ? 4 : 16;
- (*new_id)->port = SILC_SWAB_16(port);
- (*new_id)->rnd = 0xff;
-
- SILC_LOG_DEBUG(("New ID (%s)", silc_id_render(*new_id, SILC_ID_SERVER)));
-}
-
-/* Creates Client ID. This assures that there are no collisions in the
- created Client IDs. If the collision would occur (meaning that there
- are 2^8 occurences of the `nickname' this will return FALSE, and the
- caller must recall the function with different nickname. If this returns
- TRUE the new ID was created successfully. */
-
-SilcBool silc_id_create_client_id(SilcServer server,
- SilcServerID *server_id, SilcRng rng,
- SilcHash md5hash,
- unsigned char *nickname, SilcUInt32 nick_len,
- SilcClientID **new_id)
-{
- unsigned char hash[16];
- SilcBool finding = FALSE;
-
- SILC_LOG_DEBUG(("Creating new Client ID"));
-
- *new_id = silc_calloc(1, sizeof(**new_id));
-
- /* Create hash of the nickname (it's already checked as valid identifier
- string). */
- silc_hash_make(md5hash, nickname, nick_len, hash);
-
- /* Create the ID */
- memcpy((*new_id)->ip.data, server_id->ip.data, server_id->ip.data_len);
- (*new_id)->ip.data_len = server_id->ip.data_len;
- (*new_id)->rnd = silc_rng_get_byte(rng);
- memcpy((*new_id)->hash, hash, CLIENTID_HASH_LEN);
-
- /* Assure that the ID does not exist already */
- while (1) {
- if (!silc_idlist_find_client_by_id(server->local_list,
- *new_id, FALSE, NULL))
- if (!silc_idlist_find_client_by_id(server->global_list,
- *new_id, FALSE, NULL))
- break;
-
- /* The ID exists, start increasing the rnd from 0 until we find a
- ID that does not exist. If we wrap and it still exists then we
- will return FALSE and the caller must send some other nickname
- since this cannot be used anymore. */
- (*new_id)->rnd++;
-
- if (finding && (*new_id)->rnd == 0)
- return FALSE;
-
- if (!finding) {
- (*new_id)->rnd = 0;
- finding = TRUE;
- }
- }
-
- SILC_LOG_DEBUG(("New ID (%s)", silc_id_render(*new_id, SILC_ID_CLIENT)));
-
- return TRUE;
-}
-
-/* Creates Channel ID */
-
-SilcBool silc_id_create_channel_id(SilcServer server,
- SilcServerID *router_id, SilcRng rng,
- SilcChannelID **new_id)
-{
- SilcBool finding = TRUE;
-
- SILC_LOG_DEBUG(("Creating new Channel ID"));
-
- *new_id = silc_calloc(1, sizeof(**new_id));
-
- /* Create the ID */
- memcpy((*new_id)->ip.data, router_id->ip.data, router_id->ip.data_len);
- (*new_id)->ip.data_len = router_id->ip.data_len;
- (*new_id)->port = router_id->port;
- (*new_id)->rnd = silc_rng_get_rn16(rng);
-
- /* Assure that the ID does not exist already */
- while (1) {
- if (!silc_idlist_find_channel_by_id(server->local_list,
- *new_id, NULL))
- break;
-
- (*new_id)->rnd++;
-
- if (finding && (*new_id)->rnd == 0)
- return FALSE;
-
- if (!finding) {
- (*new_id)->rnd = 0;
- finding = TRUE;
- }
- }
-
- SILC_LOG_DEBUG(("New ID (%s)", silc_id_render(*new_id, SILC_ID_CHANNEL)));
-
- return TRUE;
-}
-
-/* Checks whether the `server_id' is valid. It must be based to the
- IP address provided in the `remote' socket connection. */
-
-SilcBool silc_id_is_valid_server_id(SilcServer server,
- SilcServerID *server_id,
- SilcPacketStream remote)
-{
- unsigned char ip[16];
- const char *remote_ip;
- SilcStream stream = silc_packet_stream_get_stream(remote);
-
- silc_socket_stream_get_info(stream, NULL, NULL, &remote_ip, NULL);
- if (!silc_net_addr2bin(remote_ip, ip, sizeof(ip)))
- return FALSE;
-
- if (silc_net_is_ip4(remote_ip)) {
- if (!memcmp(server_id->ip.data, ip, 4))
- return TRUE;
- } else {
- if (!memcmp(server_id->ip.data, ip, 16))
- return TRUE;
- }
-
- return FALSE;
-}
projects / runtime.git / blobdiff