+++ /dev/null
-/*
-
- server_util.c
-
- Author: Pekka Riikonen <priikone@silcnet.org>
-
- Copyright (C) 1997 - 2006 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; version 2 of the License.
-
- 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 "silc.h"
-#include "silcserver.h"
-#include "server_internal.h"
-
-/* Return next available command identifier. */
-
-SilcUInt16 silc_server_cmd_ident(SilcServer server)
-{
- SilcUInt16 cmd_ident;
-
- silc_mutex_lock(server->lock);
- cmd_ident = ++server->cmd_ident;
- silc_mutex_unlock(server->lock);
-
- return cmd_ident;
-}
-
-/* XXX locking */
-
-SilcBool silc_server_check_watcher_list(SilcServer server,
- SilcClientEntry client,
- const char *new_nick,
- SilcNotifyType notify)
-{
- return TRUE;
-}
-
-/* This function is used to send the notify packets and motd to the
- incoming client connection. */
-
-void silc_server_send_welcome(SilcServerAccept ac, SilcClientEntry client)
-{
- SilcServer server = ac->thread->server;
- SilcPacketStream stream = client->stream;
-
- SILC_LOG_DEBUG(("Send welcome notifys"));
-
- /* Send some nice info to the client */
- SILC_SERVER_SEND_NOTIFY(server, stream, SILC_NOTIFY_TYPE_NONE,
- ("Welcome to the SILC Network %s",
- client->username));
- SILC_SERVER_SEND_NOTIFY(server, stream, SILC_NOTIFY_TYPE_NONE,
- ("Your host is %s, running version %s",
- server->server_name, SILC_DIST_VERSION_STRING));
-
- if (server->server_type == SILC_ROUTER) {
- SILC_SERVER_SEND_NOTIFY(server, stream, SILC_NOTIFY_TYPE_NONE,
- ("There are %d clients, %d servers and %d "
- "routers in SILC Network",
- server->stat.clients, server->stat.servers,
- server->stat.routers));
- } else {
- if (server->stat.clients && server->stat.servers + 1)
- SILC_SERVER_SEND_NOTIFY(server, stream, SILC_NOTIFY_TYPE_NONE,
- ("There are %d clients, %d servers and %d "
- "routers in SILC Network",
- server->stat.clients, server->stat.servers,
- (server->standalone ? 0 :
- !server->stat.routers ? 1 :
- server->stat.routers)));
- }
-
- if (server->stat.cell_clients && server->stat.cell_servers + 1)
- SILC_SERVER_SEND_NOTIFY(server, stream, SILC_NOTIFY_TYPE_NONE,
- ("There are %d clients on %d servers in our cell",
- server->stat.cell_clients,
- server->stat.cell_servers));
- if (server->server_type == SILC_ROUTER) {
- SILC_SERVER_SEND_NOTIFY(server, stream, SILC_NOTIFY_TYPE_NONE,
- ("I have %d clients, %d channels, %d servers and "
- "%d routers",
- server->stat.my_clients,
- server->stat.my_channels,
- server->stat.my_servers,
- server->stat.my_routers));
- } else {
- SILC_SERVER_SEND_NOTIFY(server, stream, SILC_NOTIFY_TYPE_NONE,
- ("I have %d clients and %d channels formed",
- server->stat.my_clients,
- server->stat.my_channels));
- }
-
- if (server->stat.server_ops || server->stat.router_ops)
- SILC_SERVER_SEND_NOTIFY(server, stream, SILC_NOTIFY_TYPE_NONE,
- ("There are %d server operators and %d router "
- "operators online",
- server->stat.server_ops,
- server->stat.router_ops));
- if (server->stat.my_router_ops + server->stat.my_server_ops)
- SILC_SERVER_SEND_NOTIFY(server, stream, SILC_NOTIFY_TYPE_NONE,
- ("I have %d operators online",
- server->stat.my_router_ops +
- server->stat.my_server_ops));
-
- SILC_SERVER_SEND_NOTIFY(server, stream, SILC_NOTIFY_TYPE_NONE,
- ("Your connection is secured with %s cipher, "
- "key length %d bits",
- silc_cipher_get_name(ac->prop->cipher),
- silc_cipher_get_key_len(ac->prop->cipher)));
- SILC_SERVER_SEND_NOTIFY(server, stream, SILC_NOTIFY_TYPE_NONE,
- ("Your current nickname is %s",
- client->nickname));
-
- /* Send motd */
- silc_server_send_motd(server, stream);
-}
-
-/* Creates new Client ID. */
-
-SilcBool silc_server_create_client_id(SilcServer server, char *nickname,
- SilcClientID *new_id)
-{
- unsigned char hash[16];
- SilcBool finding = FALSE;
-
- SILC_LOG_DEBUG(("Creating new Client ID"));
-
- /* Create hash of the nickname (it's already checked as valid identifier
- string). */
- silc_hash_make(server->md5hash, nickname, strlen(nickname), hash);
-
- /* Create the ID */
- memset(new_id, 0, sizeof(*new_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(server->rng);
- memcpy(new_id->hash, hash, CLIENTID_HASH_LEN);
-
- /* Assure that the ID does not exist already */
- while (1) {
- if (!silc_server_find_client_by_id(server, 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 a Server ID. */
-
-SilcBool silc_server_create_server_id(SilcServer server,
- const char *ip, SilcUInt16 port,
- SilcServerID *new_id)
-{
- SILC_LOG_DEBUG(("Creating new Server ID"));
-
- if (!new_id)
- return FALSE;
-
- /* Create the ID */
-
- if (!silc_net_addr2bin(ip, new_id->ip.data, sizeof(new_id->ip.data)))
- return FALSE;
-
- new_id->ip.data_len = silc_net_is_ip4(ip) ? 4 : 16;
- new_id->port = SILC_SWAB_16(port);
- new_id->rnd = silc_rng_get_rn16(server->rng);
-
- SILC_LOG_DEBUG(("New ID (%s)", silc_id_render(new_id, SILC_ID_SERVER)));
-
- 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_server_check_server_id(const char *ip_address,
- SilcServerID *server_id)
-{
- unsigned char ip[16];
-
- if (!silc_net_addr2bin(ip_address, ip, sizeof(ip)))
- return FALSE;
-
- if (silc_net_is_ip4(ip_address)) {
- if (!memcmp(server_id->ip.data, ip, 4))
- return TRUE;
- } else {
- if (!memcmp(server_id->ip.data, ip, 16))
- return TRUE;
- }
-
- return FALSE;
-}
projects / crypto.git / blobdiff