+
+/* Server side of command BAN. This is used to manage the ban list of the
+ channel. To add clients and remove clients from the ban list. */
+
+SILC_SERVER_CMD_FUNC(ban)
+{
+ SilcServerCommandContext cmd = (SilcServerCommandContext)context;
+ SilcServer server = cmd->server;
+ SilcClientEntry client = (SilcClientEntry)cmd->sock->user_data;
+ SilcBuffer packet;
+ SilcChannelEntry channel;
+ SilcChannelClientEntry chl;
+ SilcChannelID *channel_id = NULL;
+ unsigned char *id, *add, *del;
+ unsigned int id_len, tmp_len;
+ unsigned short ident = silc_command_get_ident(cmd->payload);
+
+ if (cmd->sock->type != SILC_SOCKET_TYPE_CLIENT)
+ goto out;
+
+ SILC_SERVER_COMMAND_CHECK_ARGC(SILC_COMMAND_BAN, cmd, 0, 3);
+
+ /* Get Channel ID */
+ id = silc_argument_get_arg_type(cmd->args, 1, &id_len);
+ if (id) {
+ channel_id = silc_id_payload_parse_id(id, id_len);
+ if (!channel_id) {
+ silc_server_command_send_status_reply(cmd, SILC_COMMAND_BAN,
+ SILC_STATUS_ERR_NO_CHANNEL_ID);
+ goto out;
+ }
+ }
+
+ /* Get channel entry. The server must know about the channel since the
+ client is expected to be on the channel. */
+ channel = silc_idlist_find_channel_by_id(server->local_list,
+ channel_id, NULL);
+ if (!channel) {
+ channel = silc_idlist_find_channel_by_id(server->global_list,
+ channel_id, NULL);
+ if (!channel) {
+ silc_server_command_send_status_reply(cmd, SILC_COMMAND_BAN,
+ SILC_STATUS_ERR_NO_SUCH_CHANNEL);
+ goto out;
+ }
+ }
+
+ /* Check whether this client is on the channel */
+ if (!silc_server_client_on_channel(client, channel)) {
+ silc_server_command_send_status_reply(cmd, SILC_COMMAND_BAN,
+ SILC_STATUS_ERR_NOT_ON_CHANNEL);
+ goto out;
+ }
+
+ /* Get entry to the channel user list */
+ silc_list_start(channel->user_list);
+ while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END)
+ if (chl->client == client)
+ break;
+
+ /* The client must be at least channel operator. */
+ if (!(chl->mode & SILC_CHANNEL_UMODE_CHANOP)) {
+ silc_server_command_send_status_reply(cmd, SILC_COMMAND_BAN,
+ SILC_STATUS_ERR_NO_CHANNEL_PRIV);
+ goto out;
+ }
+
+ /* Get the new ban and add it to the ban list */
+ add = silc_argument_get_arg_type(cmd->args, 2, &tmp_len);
+ if (add) {
+ if (!channel->ban_list)
+ channel->ban_list = silc_calloc(tmp_len + 2, sizeof(*channel->ban_list));
+ else
+ channel->ban_list = silc_realloc(channel->ban_list,
+ sizeof(*channel->ban_list) *
+ (tmp_len +
+ strlen(channel->ban_list) + 2));
+ strncat(channel->ban_list, add, tmp_len);
+ strncat(channel->ban_list, ",", 1);
+ }
+
+ /* Get the ban to be removed and remove it from the list */
+ del = silc_argument_get_arg_type(cmd->args, 3, &tmp_len);
+ if (del && channel->ban_list) {
+ char *start, *end, *n;
+
+ if (!strncmp(channel->ban_list, del, strlen(channel->ban_list) - 1)) {
+ silc_free(channel->ban_list);
+ channel->ban_list = NULL;
+ goto out0;
+ }
+
+ start = strstr(channel->ban_list, del);
+ if (start && strlen(start) >= tmp_len) {
+ end = start + tmp_len;
+ n = silc_calloc(strlen(channel->ban_list) - tmp_len, sizeof(*n));
+ strncat(n, channel->ban_list, start - channel->ban_list);
+ strncat(n, end + 1, ((channel->ban_list + strlen(channel->ban_list)) -
+ end) - 1);
+ silc_free(channel->ban_list);
+ channel->ban_list = n;
+ }
+ }
+
+ out0:
+
+ /* Send the BAN notify type to our primary router. */
+ if (!server->standalone && (add || del))
+ silc_server_send_notify_ban(server, server->router->connection,
+ server->server_type == SILC_ROUTER ?
+ TRUE : FALSE, channel, add, del);
+
+ /* Send the reply back to the client */
+ if (channel->ban_list)
+ packet =
+ silc_command_reply_payload_encode_va(SILC_COMMAND_BAN,
+ SILC_STATUS_OK, ident, 2,
+ 2, id, id_len,
+ 3, channel->ban_list,
+ strlen(channel->ban_list) - 1);
+ else
+ packet =
+ silc_command_reply_payload_encode_va(SILC_COMMAND_BAN,
+ SILC_STATUS_OK, ident, 1,
+ 2, id, id_len);
+
+ silc_server_packet_send(server, cmd->sock, SILC_PACKET_COMMAND_REPLY, 0,
+ packet->data, packet->len, FALSE);
+
+ silc_buffer_free(packet);
+
+ out:
+ if (channel_id)
+ silc_free(channel_id);
+ silc_server_command_free(cmd);
+}
projects / crypto.git / commitdiff