Author: Pekka Riikonen <priikone@silcnet.org>
- Copyright (C) 1997 - 2001 Pekka Riikonen
+ Copyright (C) 1997 - 2002 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
#include "serverincludes.h"
#include "server_internal.h"
+extern char *server_version;
+
/* Removes the client from channels and possibly removes the channels
as well. After removing those channels that exist, their channel
keys are regnerated. This is called only by the function
/* Update statistics */
server->stat.clients--;
- if (server->server_type == SILC_ROUTER)
+ if (server->stat.cell_clients)
server->stat.cell_clients--;
SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
/* Update statistics */
server->stat.clients--;
- if (server->server_type == SILC_ROUTER)
+ if (server->stat.cell_clients)
server->stat.cell_clients--;
SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
`client' which is faster than checking the user list from `channel'. */
bool silc_server_client_on_channel(SilcClientEntry client,
- SilcChannelEntry channel)
+ SilcChannelEntry channel,
+ SilcChannelClientEntry *chl)
{
if (!client || !channel)
return FALSE;
- return silc_hash_table_find(client->channels, channel, NULL, NULL);
+ return silc_hash_table_find(client->channels, channel, NULL,
+ (void **)chl);
}
/* Checks string for bad characters and returns TRUE if they are found. */
return count;
}
+/* Find number of sockets by IP address indicated by remote host, indicatd
+ by `ip' or `hostname', `port', and `type'. Returns 0 if socket connections
+ does not exist. If `ip' is provided then `hostname' is ignored. */
+
+SilcUInt32 silc_server_num_sockets_by_remote(SilcServer server,
+ const char *ip,
+ const char *hostname,
+ SilcUInt16 port,
+ SilcSocketType type)
+{
+ int i, count;
+
+ if (!ip && !hostname)
+ return 0;
+
+ for (i = 0, count = 0; i < server->config->param.connections_max; i++) {
+ if (server->sockets[i] &&
+ ((ip && !strcmp(server->sockets[i]->ip, ip)) ||
+ (hostname && !strcmp(server->sockets[i]->hostname, hostname))) &&
+ server->sockets[i]->port == port &&
+ server->sockets[i]->type == type)
+ count++;
+ }
+
+ return count;
+}
+
/* Finds locally cached public key by the public key received in the SKE.
If we have it locally cached then we trust it and will use it in the
authentication protocol. Returns the locally cached public key or NULL
if (ske && silc_ske_parse_version(ske, &r_protocol_version, NULL,
&r_software_version, NULL,
&r_vendor_version)) {
+ sock->version = r_protocol_version;
+
/* Match protocol version */
if (l_protocol_version && r_protocol_version &&
r_protocol_version < l_protocol_version) {
return TRUE;
}
+
+/* Checks that client has rights to add or remove channel modes. If any
+ of the checks fails FALSE is returned. */
+
+bool silc_server_check_cmode_rights(SilcServer server,
+ SilcChannelEntry channel,
+ SilcChannelClientEntry client,
+ SilcUInt32 mode)
+{
+ bool is_op = client->mode & SILC_CHANNEL_UMODE_CHANOP;
+ bool is_fo = client->mode & SILC_CHANNEL_UMODE_CHANFO;
+
+ /* Check whether has rights to change anything */
+ if (!is_op && !is_fo)
+ return FALSE;
+
+ /* Check whether has rights to change everything */
+ if (is_op && is_fo)
+ return TRUE;
+
+ /* We know that client is channel operator, check that they are not
+ changing anything that requires channel founder rights. Rest of the
+ modes are available automatically for channel operator. */
+
+ if (mode & SILC_CHANNEL_MODE_PRIVKEY) {
+ if (!(channel->mode & SILC_CHANNEL_MODE_PRIVKEY))
+ if (is_op && !is_fo)
+ return FALSE;
+ } else {
+ if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
+ if (is_op && !is_fo)
+ return FALSE;
+ }
+ }
+
+ if (mode & SILC_CHANNEL_MODE_PASSPHRASE) {
+ if (!(channel->mode & SILC_CHANNEL_MODE_PASSPHRASE))
+ if (is_op && !is_fo)
+ return FALSE;
+ } else {
+ if (channel->mode & SILC_CHANNEL_MODE_PASSPHRASE) {
+ if (is_op && !is_fo)
+ return FALSE;
+ }
+ }
+
+ if (mode & SILC_CHANNEL_MODE_CIPHER) {
+ if (!(channel->mode & SILC_CHANNEL_MODE_CIPHER))
+ if (is_op && !is_fo)
+ return FALSE;
+ } else {
+ if (channel->mode & SILC_CHANNEL_MODE_CIPHER) {
+ if (is_op && !is_fo)
+ return FALSE;
+ }
+ }
+
+ if (mode & SILC_CHANNEL_MODE_FOUNDER_AUTH) {
+ if (!(channel->mode & SILC_CHANNEL_MODE_FOUNDER_AUTH))
+ if (is_op && !is_fo)
+ return FALSE;
+ } else {
+ if (channel->mode & SILC_CHANNEL_MODE_FOUNDER_AUTH) {
+ if (is_op && !is_fo)
+ return FALSE;
+ }
+ }
+
+ if (mode & SILC_CHANNEL_MODE_SILENCE_USERS) {
+ if (!(channel->mode & SILC_CHANNEL_MODE_SILENCE_USERS))
+ if (is_op && !is_fo)
+ return FALSE;
+ } else {
+ if (channel->mode & SILC_CHANNEL_MODE_SILENCE_USERS) {
+ if (is_op && !is_fo)
+ return FALSE;
+ }
+ }
+
+ if (mode & SILC_CHANNEL_MODE_SILENCE_OPERS) {
+ if (!(channel->mode & SILC_CHANNEL_MODE_SILENCE_OPERS))
+ if (is_op && !is_fo)
+ return FALSE;
+ } else {
+ if (channel->mode & SILC_CHANNEL_MODE_SILENCE_OPERS) {
+ if (is_op && !is_fo)
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+
+/* Check that the client has rights to change its user mode. Returns
+ FALSE if setting some mode is not allowed. */
+
+bool silc_server_check_umode_rights(SilcServer server,
+ SilcClientEntry client,
+ SilcUInt32 mode)
+{
+ bool server_op = FALSE, router_op = FALSE;
+
+ if (mode & SILC_UMODE_SERVER_OPERATOR) {
+ /* Cannot set server operator mode (must use OPER command) */
+ if (!(client->mode & SILC_UMODE_SERVER_OPERATOR))
+ return FALSE;
+ } else {
+ /* Remove the server operator rights */
+ if (client->mode & SILC_UMODE_SERVER_OPERATOR)
+ server_op = TRUE;
+ }
+
+ if (mode & SILC_UMODE_ROUTER_OPERATOR) {
+ /* Cannot set router operator mode (must use SILCOPER command) */
+ if (!(client->mode & SILC_UMODE_ROUTER_OPERATOR))
+ return FALSE;
+ } else {
+ /* Remove the router operator rights */
+ if (client->mode & SILC_UMODE_ROUTER_OPERATOR)
+ router_op = TRUE;
+ }
+
+ if (server_op)
+ SILC_UMODE_STATS_UPDATE(server, SILC_UMODE_SERVER_OPERATOR);
+ if (router_op)
+ SILC_UMODE_STATS_UPDATE(router, SILC_UMODE_ROUTER_OPERATOR);
+
+ return TRUE;
+}
+
+/* This function is used to send the notify packets and motd to the
+ incoming client connection. */
+
+void silc_server_send_connect_notifys(SilcServer server,
+ SilcSocketConnection sock,
+ SilcClientEntry client)
+{
+ SilcIDListData idata = (SilcIDListData)client;
+
+ /* Send some nice info to the client */
+ SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
+ ("Welcome to the SILC Network %s",
+ client->username));
+ SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
+ ("Your host is %s, running version %s",
+ server->server_name, server_version));
+
+ if (server->stat.clients && server->stat.servers + 1)
+ SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
+ ("There are %d clients on %d servers in SILC "
+ "Network", server->stat.clients,
+ server->stat.servers + 1));
+ if (server->stat.cell_clients && server->stat.cell_servers + 1)
+ SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
+ ("There are %d clients on %d server in our cell",
+ server->stat.cell_clients,
+ server->stat.cell_servers + 1));
+ if (server->server_type == SILC_ROUTER) {
+ SILC_SERVER_SEND_NOTIFY(server, sock, 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, sock, 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, sock, 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, sock, SILC_NOTIFY_TYPE_NONE,
+ ("I have %d operators online",
+ server->stat.my_router_ops +
+ server->stat.my_server_ops));
+
+ SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
+ ("Your connection is secured with %s cipher, "
+ "key length %d bits",
+ idata->send_key->cipher->name,
+ idata->send_key->cipher->key_len));
+ SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
+ ("Your current nickname is %s",
+ client->nickname));
+
+ /* Send motd */
+ silc_server_send_motd(server, sock);
+}
+
+/* Kill the client indicated by `remote_client' sending KILLED notify
+ to the client, to all channels client has joined and to primary
+ router if needed. The killed client is also removed from all channels. */
+
+void silc_server_kill_client(SilcServer server,
+ SilcClientEntry remote_client,
+ const char *comment,
+ void *killer_id,
+ SilcIdType killer_id_type)
+{
+ SilcBuffer killed, killer;
+
+ /* Send the KILL notify packets. First send it to the channel, then
+ to our primary router and then directly to the client who is being
+ killed right now. */
+
+ killed = silc_id_payload_encode(remote_client->id, SILC_ID_CLIENT);
+ killer = silc_id_payload_encode(killer_id, killer_id_type);
+
+ /* Send KILLED notify to the channels. It is not sent to the client
+ as it will be sent differently destined directly to the client and not
+ to the channel. */
+ silc_server_send_notify_on_channels(server, remote_client,
+ remote_client, SILC_NOTIFY_TYPE_KILLED,
+ 3, killed->data, killed->len,
+ comment, comment ? strlen(comment) : 0,
+ killer->data, killer->len);
+
+ /* Send KILLED notify to primary route */
+ if (!server->standalone)
+ silc_server_send_notify_killed(server, server->router->connection, TRUE,
+ remote_client->id, comment,
+ killer_id, killer_id_type);
+
+ /* Send KILLED notify to the client directly */
+ if (remote_client->connection || remote_client->router)
+ silc_server_send_notify_killed(server, remote_client->connection ?
+ remote_client->connection :
+ remote_client->router->connection, FALSE,
+ remote_client->id, comment,
+ killer_id, killer_id_type);
+
+ /* Remove the client from all channels. This generates new keys to the
+ channels as well. */
+ silc_server_remove_from_channels(server, NULL, remote_client, FALSE,
+ NULL, TRUE);
+
+ /* Remove the client entry, If it is locally connected then we will also
+ disconnect the client here */
+ if (remote_client->connection) {
+ /* Remove locally conneted client */
+ SilcSocketConnection sock = remote_client->connection;
+ silc_server_free_client_data(server, sock, remote_client, FALSE, NULL);
+ silc_server_close_connection(server, sock);
+ } else {
+ /* Update statistics */
+ server->stat.clients--;
+ server->stat.my_clients--;
+ if (server->stat.cell_clients)
+ server->stat.cell_clients--;
+ SILC_OPER_STATS_UPDATE(remote_client, server, SILC_UMODE_SERVER_OPERATOR);
+ SILC_OPER_STATS_UPDATE(remote_client, router, SILC_UMODE_ROUTER_OPERATOR);
+
+ /* Remove remote client */
+ if (!silc_idlist_del_client(server->global_list, remote_client))
+ silc_idlist_del_client(server->local_list, remote_client);
+}
+
+ silc_buffer_free(killer);
+ silc_buffer_free(killed);
+}
projects / silc.git / blobdiff