root / Whitix / branches / network / net / device.c

/*  This file is part of Whitix.
 *
 *  Whitix 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.
 *
 *  Whitix 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 Whitix; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#include <fs/devfs.h>
#include <fs/vfs.h>
#include <init.h>
#include <net/network.h>
#include <net/socket.h>
#include <slab.h>

struct Cache* netDeviceCache;

#define NETWORK_MAJOR   128

/* Only one device for now! TODO: Add support for multiple devices. */
struct NetDevice* currDevice;

struct NetDevice* NetDeviceAlloc()
{
        return (struct NetDevice*)MemCacheAlloc(netDeviceCache);
}

/* Public API */

int NetDeviceSend(struct NetDevice* device, struct SocketBuffer* buffer)
{
        if (!device->ops || !device->ops->send)
                return -ENOTIMPL;

        if (device-> state & NET_DEVICE_QUEUE_RUNNING)
                return device->ops->send(device, buffer);
        else{
                /* Add the packet onto the queue, and wait for the device to pick
                 * it up once it has finished an event like a send interrupt.
                 */
                ListAddTail(&buffer->next, &device->sendList);
        }
}

int NetDeviceIoCtl(struct File* file, unsigned long code, BYTE* data)
{
        struct NetDevice* netDevice=currDevice; /* For now! */

        if (code >= 0x40000000)
        {
                if (netDevice->protoOps->ioctl)
                        return netDevice->protoOps->ioctl(netDevice, code, data);
                else
                        return -ENOTIMPL;
        }

        printf("NetDeviceIoCtl\n");
        return 0;
}

struct FileOps netFileOps=
{
        .ioctl = NetDeviceIoCtl,
};

int NetDeviceRegister(struct NetDevice* device)
{
        char buf[32];

        currDevice=device;

        /* Add to the device filesystem. TODO: Check for already existing devices. */
        sprintf(buf, "Network/%s%d", device->name, 0);

        DevAddDevice(buf, NETWORK_MAJOR, 0, DEVICE_CHAR, &netFileOps);
        INIT_LIST_HEAD(&device->sendList);
        device->state = NET_DEVICE_UP | NET_DEVICE_QUEUE_RUNNING;

        return 0;
}

int NetDeviceInit()
{
        netDeviceCache=MemCacheCreate("Network device cache", sizeof(struct NetDevice), NULL, NULL, 0);
        return 0;
}

NetInit(NetDeviceInit);