Example #1
0
int scan_pathchk(const char *path, struct cli_ftw_cbdata *data)
{
	struct scan_cb_data *scandata = data->data;
	const struct optstruct *opt;
	STATBUF statbuf;

    if((opt = optget(scandata->opts, "ExcludePath"))->enabled) {
	while(opt) {
	    if(match_regex(path, opt->strarg) == 1) {
		if(scandata->type != TYPE_MULTISCAN)
		    conn_reply_single(scandata->conn, path, "Excluded");
		return 1;
	    }
	    opt = (const struct optstruct *) opt->nextarg;
	}
    }

    if(!optget(scandata->opts, "CrossFilesystems")->enabled) {
	if(CLAMSTAT(path, &statbuf) == 0) {
	    if(statbuf.st_dev != scandata->dev) {
		if(scandata->type != TYPE_MULTISCAN)
		    conn_reply_single(scandata->conn, path, "Excluded (another filesystem)");
		return 1;
	    }
	}
    }

    return 0;
}
Example #2
0
/* returns:
 *  <0 for error
 *     -1 out of memory
 *     -2 other
 *   0 for async dispatched
 *   1 for command completed (connection can be closed)
 */
int execute_or_dispatch_command(client_conn_t *conn, enum commands cmd, const char *argument)
{
    int desc = conn->sd;
    char term = conn->term;
    const struct cl_engine *engine = conn->engine;
    /* execute commands that can be executed quickly on the recvloop thread,
     * these must:
     *  - not involve any operation that can block for a long time, such as disk
     *  I/O
     *  - send of atomic message is allowed.
     * Dispatch other commands */
    if (conn->group) {
	switch (cmd) {
	    case COMMAND_FILDES:
	    case COMMAND_SCAN:
	    case COMMAND_END:
	    case COMMAND_INSTREAM:
	    case COMMAND_INSTREAMSCAN:
	    case COMMAND_VERSION:
	    case COMMAND_PING:
	    case COMMAND_STATS:
	    case COMMAND_COMMANDS:
		/* These commands are accepted inside IDSESSION */
		break;
	    default:
		/* these commands are not recognized inside an IDSESSION */
		conn_reply_error(conn, "Command invalid inside IDSESSION.");
		logg("$SESSION: command is not valid inside IDSESSION: %d\n", cmd);
		conn->group = NULL;
		return 1;
	}
    }

    switch (cmd) {
	case COMMAND_SHUTDOWN:
	    pthread_mutex_lock(&exit_mutex);
	    progexit = 1;
	    pthread_mutex_unlock(&exit_mutex);
	    return 1;
	case COMMAND_RELOAD:
	    pthread_mutex_lock(&reload_mutex);
	    reload = 1;
	    pthread_mutex_unlock(&reload_mutex);
	    mdprintf(desc, "RELOADING%c", term);
	    /* we set reload flag, and we'll reload before closing the
	     * connection */
	    return 1;
	case COMMAND_PING:
	    if (conn->group)
		mdprintf(desc, "%u: PONG%c", conn->id, term);
	    else
		mdprintf(desc, "PONG%c", term);
	    return conn->group ? 0 : 1;
	case COMMAND_VERSION:
	    {
		if (conn->group)
		    mdprintf(desc, "%u: ", conn->id);
		print_ver(desc, conn->term, engine);
		return conn->group ? 0 : 1;
	    }
	case COMMAND_COMMANDS:
	    {
		if (conn->group)
		    mdprintf(desc, "%u: ", conn->id);
		print_commands(desc, conn->term, engine);
		return conn->group ? 0 : 1;
	    }
	case COMMAND_DETSTATSCLEAR:
	    {
		detstats_clear();
		return 1;
	    }
	case COMMAND_DETSTATS:
	    {
		detstats_print(desc, conn->term);
		return 1;
	    }
	case COMMAND_INSTREAM:
	    {
		int rc = cli_gentempfd(optget(conn->opts, "TemporaryDirectory")->strarg, &conn->filename, &conn->scanfd);
		if (rc != CL_SUCCESS)
		    return rc;
		conn->quota = optget(conn->opts, "StreamMaxLength")->numarg;
		conn->mode = MODE_STREAM;
		return 0;
	    }
	case COMMAND_STREAM:
	case COMMAND_MULTISCAN:
	case COMMAND_CONTSCAN:
	case COMMAND_STATS:
	case COMMAND_FILDES:
	case COMMAND_SCAN:
	case COMMAND_INSTREAMSCAN:
	    return dispatch_command(conn, cmd, argument);
	case COMMAND_IDSESSION:
	    conn->group = thrmgr_group_new();
	    if (!conn->group)
		return CL_EMEM;
	    return 0;
	case COMMAND_END:
	    if (!conn->group) {
		/* end without idsession? */
		conn_reply_single(conn, NULL, "UNKNOWN COMMAND");
		return 1;
	    }
	    /* need to close connection  if we were last in group */
	    return 1;
	/*case COMMAND_UNKNOWN:*/
	default:
	    conn_reply_single(conn, NULL, "UNKNOWN COMMAND");
	    return 1;
    }
}
Example #3
0
/* returns
 *  -1 on fatal error (shutdown)
 *  0 on ok
 *  >0 errors encountered
 */
int command(client_conn_t *conn, int *virus)
{
    int desc = conn->sd;
    struct cl_engine *engine = conn->engine;
    unsigned int options = conn->options;
    const struct optstruct *opts = conn->opts;
    int type = -1; /* TODO: make this enum */
    int maxdirrec;
    int ret = 0;
    int flags = CLI_FTW_STD;

    struct scan_cb_data scandata;
    struct cli_ftw_cbdata data;
    unsigned ok, error, total;
    STATBUF sb;
    jobgroup_t *group = NULL;

    if (thrmgr_group_need_terminate(conn->group)) {
	logg("$Client disconnected while command was active\n");
	if (conn->scanfd != -1)
	    close(conn->scanfd);
	return 1;
    }
    thrmgr_setactiveengine(engine);

    data.data = &scandata;
    memset(&scandata, 0, sizeof(scandata));
    scandata.id = conn->id;
    scandata.group = conn->group;
    scandata.odesc = desc;
    scandata.conn = conn;
    scandata.options = options;
    scandata.engine = engine;
    scandata.opts = opts;
    scandata.thr_pool = conn->thrpool;
    scandata.toplevel_path = conn->filename;

    switch (conn->cmdtype) {
	case COMMAND_SCAN:
	    thrmgr_setactivetask(NULL, "SCAN");
	    type = TYPE_SCAN;
	    break;
	case COMMAND_CONTSCAN:
	    thrmgr_setactivetask(NULL, "CONTSCAN");
	    type = TYPE_CONTSCAN;
	    break;
	case COMMAND_MULTISCAN: {
	    int multiscan, max, alive;

	    /* use MULTISCAN only for directories (bb #1869) */
	    if (STAT(conn->filename, &sb) == 0 &&
		!S_ISDIR(sb.st_mode)) {
		thrmgr_setactivetask(NULL, "CONTSCAN");
		type = TYPE_CONTSCAN;
		break;
	    }

	    pthread_mutex_lock(&conn->thrpool->pool_mutex);
	    multiscan = conn->thrpool->thr_multiscan;
	    max = conn->thrpool->thr_max;
	    if (multiscan+1 < max)
		conn->thrpool->thr_multiscan = multiscan+1;
	    else {
		alive = conn->thrpool->thr_alive;
		ret = -1;
	    }
	    pthread_mutex_unlock(&conn->thrpool->pool_mutex);
	    if (ret) {
		/* multiscan has 1 control thread, so there needs to be at least
		   1 threads that is a non-multiscan controlthread to scan and
		   make progress. */
		logg("^Not enough threads for multiscan. Max: %d, Alive: %d, Multiscan: %d+1\n",
		     max, alive, multiscan);
		conn_reply(conn, conn->filename, "Not enough threads for multiscan. Increase MaxThreads.", "ERROR");
		return 1;
	    }
	    flags &= ~CLI_FTW_NEED_STAT;
	    thrmgr_setactivetask(NULL, "MULTISCAN");
	    type = TYPE_MULTISCAN;
	    scandata.group = group = thrmgr_group_new();
	    if (!group) {
	      if(optget(opts, "ExitOnOOM")->enabled)
		return -1;
	      else
		return 1;
	    }
	    break;
	    }
	case COMMAND_MULTISCANFILE:
	    thrmgr_setactivetask(NULL, "MULTISCANFILE");
	    scandata.group = NULL;
	    scandata.type = TYPE_SCAN;
	    scandata.thr_pool = NULL;
	    /* TODO: check ret value */
	    ret = scan_callback(NULL, conn->filename, conn->filename, visit_file, &data);	    /* callback freed it */
	    conn->filename = NULL;
	    *virus = scandata.infected;
	    if (ret == CL_BREAK) {
		thrmgr_group_terminate(conn->group);
		return 1;
	    }
	    return scandata.errors > 0 ? scandata.errors : 0;
	case COMMAND_FILDES:
	    thrmgr_setactivetask(NULL, "FILDES");
#ifdef HAVE_FD_PASSING
	    if (conn->scanfd == -1) {
		conn_reply_error(conn, "FILDES: didn't receive file descriptor.");
		return 1;
	    }
	    else {
		ret = scanfd(conn, NULL, engine, options, opts, desc, 0);
		if (ret == CL_VIRUS) {
		    *virus = 1;
		    ret = 0;
		} else if (ret == CL_EMEM) {
		    if(optget(opts, "ExitOnOOM")->enabled)
			ret = -1;
		    else
		        ret = 1;
		} else if (ret == CL_ETIMEOUT) {
			thrmgr_group_terminate(conn->group);
			ret = 1;
		} else
		    ret = 0;
		logg("$Closed fd %d\n", conn->scanfd);
		close(conn->scanfd);
	    }
	    return ret;
#else
	    conn_reply_error(conn, "FILDES support not compiled in.");
	    close(conn->scanfd);
	    return 0;
#endif
	case COMMAND_STATS:
	    thrmgr_setactivetask(NULL, "STATS");
	    if (conn->group)
		mdprintf(desc, "%u: ", conn->id);
	    thrmgr_printstats(desc, conn->term);
	    return 0;
	case COMMAND_STREAM:
	    thrmgr_setactivetask(NULL, "STREAM");
	    ret = scanstream(desc, NULL, engine, options, opts, conn->term);
	    if (ret == CL_VIRUS)
		*virus = 1;
	    if (ret == CL_EMEM) {
		if(optget(opts, "ExitOnOOM")->enabled)
		    return -1;
		else
		    return 1;
	    }
	    return 0;
	case COMMAND_INSTREAMSCAN:
	    thrmgr_setactivetask(NULL, "INSTREAM");
	    ret = scanfd(conn, NULL, engine, options, opts, desc, 1);
	    if (ret == CL_VIRUS) {
		*virus = 1;
		ret = 0;
	    } else if (ret == CL_EMEM) {
		if(optget(opts, "ExitOnOOM")->enabled)
		    ret = -1;
		else
 		    ret = 1;
	    } else if (ret == CL_ETIMEOUT) {
		thrmgr_group_terminate(conn->group);
		ret = 1;
	    } else
		ret = 0;
	    if (ftruncate(conn->scanfd, 0) == -1) {
		/* not serious, we're going to close it and unlink it anyway */
		logg("*ftruncate failed: %d\n", errno);
	    }
	    close(conn->scanfd);
	    conn->scanfd = -1;
	    cli_unlink(conn->filename);
	    return ret;
	default:
	    logg("!Invalid command distpached: %d\n", conn->cmdtype);
	    return 1;
    }

    scandata.type = type;
    maxdirrec = optget(opts, "MaxDirectoryRecursion")->numarg;
    if (optget(opts, "FollowDirectorySymlinks")->enabled)
	flags |= CLI_FTW_FOLLOW_DIR_SYMLINK;
    if (optget(opts, "FollowFileSymlinks")->enabled)
	flags |= CLI_FTW_FOLLOW_FILE_SYMLINK;

    if(!optget(opts, "CrossFilesystems")->enabled)
	if(STAT(conn->filename, &sb) == 0)
	    scandata.dev = sb.st_dev;

    ret = cli_ftw(conn->filename, flags,  maxdirrec ? maxdirrec : INT_MAX, scan_callback, &data, scan_pathchk);
    if (ret == CL_EMEM) {
	if(optget(opts, "ExitOnOOM")->enabled)
	    return -1;
	else
	    return 1;
    }
    if (scandata.group && type == TYPE_MULTISCAN) {
	thrmgr_group_waitforall(group, &ok, &error, &total);
	pthread_mutex_lock(&conn->thrpool->pool_mutex);
	conn->thrpool->thr_multiscan--;
	pthread_mutex_unlock(&conn->thrpool->pool_mutex);
    } else {
	error = scandata.errors;
	total = scandata.total;
	ok = total - error - scandata.infected;
    }

    if (ok + error == total && (error != total)) {
	if (conn_reply_single(conn, conn->filename, "OK") == -1)
	    ret = CL_ETIMEOUT;
    }
    *virus = total - (ok + error);

    if (ret == CL_ETIMEOUT)
	thrmgr_group_terminate(conn->group);
    return error;
}
Example #4
0
int scanfd(const client_conn_t *conn, unsigned long int *scanned,
	   const struct cl_engine *engine,
	   unsigned int options, const struct optstruct *opts, int odesc, int stream)
{
    int ret, fd = conn->scanfd;
	const char *virname;
	STATBUF statbuf;
	struct cb_context context;
	char fdstr[32];
	const char*reply_fdstr;

    UNUSEDPARAM(odesc);

	if (stream) {
	    struct sockaddr_in sa;
	    socklen_t salen = sizeof(sa);
	    if(getpeername(conn->sd, (struct sockaddr *)&sa, &salen) || salen > sizeof(sa) || sa.sin_family != AF_INET)
		strncpy(fdstr, "instream(local)", sizeof(fdstr));
	    else
		snprintf(fdstr, sizeof(fdstr), "instream(%s@%u)", inet_ntoa(sa.sin_addr), ntohs(sa.sin_port));
	    reply_fdstr = "stream";
	} else {
	    snprintf(fdstr, sizeof(fdstr), "fd[%d]", fd);
	    reply_fdstr = fdstr;
	}
	if(FSTAT(fd, &statbuf) == -1 || !S_ISREG(statbuf.st_mode)) {
		logg("%s: Not a regular file. ERROR\n", fdstr);
		if (conn_reply(conn, reply_fdstr, "Not a regular file", "ERROR") == -1)
		    return CL_ETIMEOUT;
		return -1;
	}

	thrmgr_setactivetask(fdstr, NULL);
	context.filename = fdstr;
	context.virsize = 0;
        context.scandata = NULL;
	ret = cl_scandesc_callback(fd, &virname, scanned, engine, options, &context);
	thrmgr_setactivetask(NULL, NULL);

	if (thrmgr_group_need_terminate(conn->group)) {
	    logg("*Client disconnected while scanjob was active\n");
	    return ret == CL_ETIMEOUT ? ret : CL_BREAK;
	}

	if(ret == CL_VIRUS) {
		if (conn_reply_virus(conn, reply_fdstr, virname) == -1)
		    ret = CL_ETIMEOUT;
		if(context.virsize && optget(opts, "ExtendedDetectionInfo")->enabled)
		    logg("%s: %s(%s:%llu) FOUND\n", fdstr, virname, context.virhash, context.virsize);
		else
		    logg("%s: %s FOUND\n", fdstr, virname);
		virusaction(reply_fdstr, virname, opts);
	} else if(ret != CL_CLEAN) {
		if (conn_reply(conn, reply_fdstr, cl_strerror(ret), "ERROR") == -1)
		    ret = CL_ETIMEOUT;
		logg("%s: %s ERROR\n", fdstr, cl_strerror(ret));
	} else {
		if (conn_reply_single(conn, reply_fdstr, "OK") == CL_ETIMEOUT)
		    ret = CL_ETIMEOUT;
		if(logok)
			logg("%s: OK\n", fdstr);
	}
	return ret;
}
Example #5
0
int scan_callback(STATBUF *sb, char *filename, const char *msg, enum cli_ftw_reason reason, struct cli_ftw_cbdata *data)
{
    struct scan_cb_data *scandata = data->data;
    const char *virname = NULL;
    int ret;
    int type = scandata->type;
    struct cb_context context;

    /* detect disconnected socket, 
     * this should NOT detect half-shutdown sockets (SHUT_WR) */
    if (send(scandata->conn->sd, &ret, 0, 0) == -1 && errno != EINTR) {
	logg("$Client disconnected while command was active!\n");
	thrmgr_group_terminate(scandata->conn->group);
	if (reason == visit_file)
	    free(filename);
	return CL_BREAK;
    }

    if (thrmgr_group_need_terminate(scandata->conn->group)) {
	logg("^Client disconnected while scanjob was active\n");
	if (reason == visit_file)
	    free(filename);
	return CL_BREAK;
    }
    scandata->total++;
    switch (reason) {
	case error_mem:
	    if (msg)
		logg("!Memory allocation failed during cli_ftw() on %s\n",
		     msg);
	    else
		logg("!Memory allocation failed during cli_ftw()\n");
	    scandata->errors++;
	    return CL_EMEM;
	case error_stat:
	    conn_reply_errno(scandata->conn, msg, "lstat() failed:");
	    logg("^lstat() failed on: %s\n", msg);
	    scandata->errors++;
	    return CL_SUCCESS;
	case warning_skipped_dir:
	    logg("^Directory recursion limit reached, skipping %s\n",
		     msg);
	    return CL_SUCCESS;
	case warning_skipped_link:
	    logg("$Skipping symlink: %s\n", msg);
	    return CL_SUCCESS;
	case warning_skipped_special:
	    if (msg == scandata->toplevel_path)
		conn_reply(scandata->conn, msg, "Not supported file type", "ERROR");
	    logg("*Not supported file type: %s\n", msg);
	    return CL_SUCCESS;
	case visit_directory_toplev:
	    return CL_SUCCESS;
	case visit_file:
	    break;
    }

    /* check whether the file is excluded */
#ifdef C_LINUX
    if(procdev && sb && (sb->st_dev == procdev)) {
	free(filename);
	return CL_SUCCESS;
    }
#endif

    if(sb && sb->st_size == 0) { /* empty file */
	if (msg == scandata->toplevel_path)
	    conn_reply_single(scandata->conn, filename, "Empty file");
	free(filename);
	return CL_SUCCESS;
    }

    if (type == TYPE_MULTISCAN) {
	client_conn_t *client_conn = (client_conn_t *) calloc(1, sizeof(struct client_conn_tag));
	if(client_conn) {
	    client_conn->scanfd = -1;
	    client_conn->sd = scandata->odesc;
	    client_conn->filename = filename;
	    client_conn->cmdtype = COMMAND_MULTISCANFILE;
	    client_conn->term = scandata->conn->term;
	    client_conn->options = scandata->options;
	    client_conn->opts = scandata->opts;
	    client_conn->group = scandata->group;
	    if(cl_engine_addref(scandata->engine)) {
		logg("!cl_engine_addref() failed\n");
		free(filename);
		free(client_conn);
		return CL_EMEM;
	    } else {
		client_conn->engine = scandata->engine;
		pthread_mutex_lock(&reload_mutex);
		client_conn->engine_timestamp = reloaded_time;
		pthread_mutex_unlock(&reload_mutex);
		if(!thrmgr_group_dispatch(scandata->thr_pool, scandata->group, client_conn, 1)) {
		    logg("!thread dispatch failed\n");
		    cl_engine_free(scandata->engine);
		    free(filename);
		    free(client_conn);
		    return CL_EMEM;
		}
	    }
	} else {
	    logg("!Can't allocate memory for client_conn\n");
	    scandata->errors++;
	    free(filename);
	    return CL_EMEM;
	}
	return CL_SUCCESS;
    }

    if (access(filename, R_OK)) {
	if (conn_reply(scandata->conn, filename, "Access denied.", "ERROR") == -1) {
	    free(filename);
	    return CL_ETIMEOUT;
	}
	logg("*Access denied: %s\n", filename);
	scandata->errors++;
	free(filename);
	return CL_SUCCESS;
    }

    thrmgr_setactivetask(filename, NULL);
    context.filename = filename;
    context.virsize = 0;
    context.scandata = scandata;
    ret = cl_scanfile_callback(filename, &virname, &scandata->scanned, scandata->engine, scandata->options, &context);
    thrmgr_setactivetask(NULL, NULL);

    if (thrmgr_group_need_terminate(scandata->conn->group)) {
	free(filename);
	logg("*Client disconnected while scanjob was active\n");
	return ret == CL_ETIMEOUT ? ret : CL_BREAK;
    }

    if ((ret == CL_VIRUS) && (virname == NULL)) {
        logg("*%s: reported CL_VIRUS but no virname returned!\n", filename);
        ret = CL_EMEM;
    }

    if (ret == CL_VIRUS) {
        scandata->infected++;

        if (scandata->options & CL_SCAN_ALLMATCHES) {
            if(optget(scandata->opts, "PreludeEnable")->enabled){
                prelude_logging(filename, virname, context.virhash, context.virsize);
            }
            virusaction(filename, virname, scandata->opts);
        } else {
            if (conn_reply_virus(scandata->conn, filename, virname) == -1) {
                free(filename);
                return CL_ETIMEOUT;
            }

            if(optget(scandata->opts, "PreludeEnable")->enabled){
                prelude_logging(filename, virname, context.virhash, context.virsize);
            }

            if(context.virsize && optget(scandata->opts, "ExtendedDetectionInfo")->enabled)
                logg("~%s: %s(%s:%llu) FOUND\n", filename, virname, context.virhash, context.virsize);
            else
                logg("~%s: %s FOUND\n", filename, virname);
            virusaction(filename, virname, scandata->opts);
        }
    } else if (ret != CL_CLEAN) {
	scandata->errors++;
	if (conn_reply(scandata->conn, filename, cl_strerror(ret), "ERROR") == -1) {
	    free(filename);
	    return CL_ETIMEOUT;
	}
	logg("~%s: %s ERROR\n", filename, cl_strerror(ret));
    } else if (logok) {
	logg("~%s: OK\n", filename);
    }

    free(filename);

    if(ret == CL_EMEM) /* stop scanning */
	return ret;

    if (type == TYPE_SCAN) {
	/* virus -> break */
	return ret;
    }

    /* keep scanning always */
    return CL_SUCCESS;
}
Example #6
0
/* returns
 *  -1 on fatal error (shutdown)
 *  0 on ok
 *  >0 errors encountered
 */
int command(client_conn_t *conn, int *virus)
{
    int desc = conn->sd;
    struct cl_engine *engine = conn->engine;
    unsigned int options = conn->options;
    const struct optstruct *opts = conn->opts;
    int type = -1; /* TODO: make this enum */
    int maxdirrec;
    int ret = 0;
    int flags = CLI_FTW_STD;

    struct scan_cb_data scandata;
    struct cli_ftw_cbdata data;
    unsigned ok, error, total;
    jobgroup_t *group = NULL;

    if (thrmgr_group_need_terminate(conn->group)) {
	logg("$Client disconnected while command was active\n");
	if (conn->scanfd != -1)
	    close(conn->scanfd);
	return 1;
    }
    thrmgr_setactiveengine(engine);

    data.data = &scandata;
    memset(&scandata, 0, sizeof(scandata));
    scandata.id = conn->id;
    scandata.group = conn->group;
    scandata.odesc = desc;
    scandata.conn = conn;
    scandata.options = options;
    scandata.engine = engine;
    scandata.opts = opts;
    scandata.thr_pool = conn->thrpool;
    scandata.toplevel_path = conn->filename;

    switch (conn->cmdtype) {
	case COMMAND_SCAN:
	    thrmgr_setactivetask(NULL, "SCAN");
	    type = TYPE_SCAN;
	    break;
	case COMMAND_CONTSCAN:
	    thrmgr_setactivetask(NULL, "CONTSCAN");
	    type = TYPE_CONTSCAN;
	    break;
	case COMMAND_MULTISCAN:
	    flags &= ~CLI_FTW_NEED_STAT;
	    thrmgr_setactivetask(NULL, "MULTISCAN");
	    type = TYPE_MULTISCAN;
	    scandata.group = group = thrmgr_group_new();
	    if (!group)
		return CL_EMEM;
	    break;
	case COMMAND_MULTISCANFILE:
	    thrmgr_setactivetask(NULL, "MULTISCANFILE");
	    scandata.group = NULL;
	    scandata.type = TYPE_SCAN;
	    scandata.thr_pool = NULL;
	    /* TODO: check ret value */
	    ret = scan_callback(NULL, conn->filename, conn->filename, visit_file, &data);	    /* callback freed it */
	    conn->filename = NULL;
	    *virus = scandata.infected;
	    if (ret == CL_BREAK) {
		thrmgr_group_terminate(conn->group);
		return CL_BREAK;
	    }
	    return scandata.errors > 0 ? scandata.errors : 0;
	case COMMAND_FILDES:
	    thrmgr_setactivetask(NULL, "FILDES");
#ifdef HAVE_FD_PASSING
	    if (conn->scanfd == -1)
		conn_reply_error(conn, "FILDES: didn't receive file descriptor.");
	    else {
		ret = scanfd(conn->scanfd, conn, NULL, engine, options, opts, desc, 0);
		if (ret == CL_VIRUS) {
		    *virus = 1;
		} else if (ret == CL_EMEM) {
		    if(optget(opts, "ExitOnOOM")->enabled)
			ret = -1;
		} else if (ret == CL_ETIMEOUT) {
			thrmgr_group_terminate(conn->group);
			ret = 1;
		} else
		    ret = 0;
	    }
	    logg("$Closed fd %d\n", conn->scanfd);
	    close(conn->scanfd);
	    return ret;
#else
	    conn_reply_error(conn, "FILDES support not compiled in.");
	    close(conn->scanfd);
	    return 0;
#endif
	case COMMAND_STATS:
	    thrmgr_setactivetask(NULL, "STATS");
	    if (conn->group)
		mdprintf(desc, "%u: ", conn->id);
	    thrmgr_printstats(desc);
	    return 0;
	case COMMAND_STREAM:
	    thrmgr_setactivetask(NULL, "STREAM");
	    ret = scanstream(desc, NULL, engine, options, opts, conn->term);
	    if (ret == CL_VIRUS)
		*virus = 1;
	    if (ret == CL_EMEM) {
		if(optget(opts, "ExitOnOOM")->enabled)
		    return -1;
	    }
	    return 0;
	case COMMAND_INSTREAMSCAN:
	    thrmgr_setactivetask(NULL, "INSTREAM");
	    ret = scanfd(conn->scanfd, conn, NULL, engine, options, opts, desc, 1);
	    if (ret == CL_VIRUS) {
		*virus = 1;
	    } else if (ret == CL_EMEM) {
		if(optget(opts, "ExitOnOOM")->enabled)
		    ret = -1;
	    } else if (ret == CL_ETIMEOUT) {
		thrmgr_group_terminate(conn->group);
		ret = 1;
	    } else
		ret = 0;
	    if (ftruncate(conn->scanfd, 0) == -1) {
		/* not serious, we're going to close it and unlink it anyway */
		logg("*ftruncate failed: %d\n", errno);
	    }
	    close(conn->scanfd);
	    conn->scanfd = -1;
	    cli_unlink(conn->filename);
	    return ret;
    }

    scandata.type = type;
    maxdirrec = optget(opts, "MaxDirectoryRecursion")->numarg;
    if (optget(opts, "FollowDirectorySymlinks")->enabled)
	flags |= CLI_FTW_FOLLOW_DIR_SYMLINK;
    if (optget(opts, "FollowFileSymlinks")->enabled)
	flags |= CLI_FTW_FOLLOW_FILE_SYMLINK;
    ret = cli_ftw(conn->filename, flags,  maxdirrec ? maxdirrec : INT_MAX, scan_callback, &data);
    if (ret == CL_EMEM)
	if(optget(opts, "ExitOnOOM")->enabled)
	    return -1;
    if (scandata.group && conn->cmdtype == COMMAND_MULTISCAN) {
	thrmgr_group_waitforall(group, &ok, &error, &total);
    } else {
	error = scandata.errors;
	total = scandata.total;
	ok = total - error - scandata.infected;
    }

    if (ok + error == total && (error != total)) {
	if (conn_reply_single(conn, conn->filename, "OK") == -1)
	    ret = CL_ETIMEOUT;
    }
    *virus = total - (ok + error);

    if (ret == CL_ETIMEOUT)
	thrmgr_group_terminate(conn->group);
    return error;
}