discovery.c

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/*
 * This file is part of the libjaylink project.
 *
 * Copyright (C) 2014-2016 Marc Schink <jaylink-dev@marcschink.de>
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <stdlib.h>

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "libjaylink.h"
#include "libjaylink-internal.h"

static void clear_discovery_list(struct jaylink_context *ctx)
{
    struct list *item;
    struct list *tmp;
    struct jaylink_device *dev;

    item = ctx->discovered_devs;

    while (item) {
        dev = (struct jaylink_device *)item->data;
        jaylink_unref_device(dev);

        tmp = item;
        item = item->next;
        free(tmp);
    }

    ctx->discovered_devs = NULL;
}

JAYLINK_API int jaylink_discovery_scan(struct jaylink_context *ctx,
        uint32_t ifaces)
{
    int ret;

    if (!ctx)
        return JAYLINK_ERR_ARG;

    if (!ifaces)
        ifaces = JAYLINK_HIF_USB | JAYLINK_HIF_TCP;

    clear_discovery_list(ctx);

#ifdef HAVE_LIBUSB
    if (ifaces & JAYLINK_HIF_USB) {
        ret = discovery_usb_scan(ctx);

        if (ret != JAYLINK_OK) {
            log_err(ctx, "USB device discovery failed.");
            return ret;
        }
    }
#endif

    if (ifaces & JAYLINK_HIF_TCP) {
        ret = discovery_tcp_scan(ctx);

        if (ret != JAYLINK_OK) {
            log_err(ctx, "TCP/IP device discovery failed.");
            return ret;
        }
    }

    return JAYLINK_OK;
}