1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
931 lines
21 KiB
C
931 lines
21 KiB
C
/*
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RFCOMM implementation for Linux Bluetooth stack (BlueZ).
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Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com>
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Copyright (C) 2002 Marcel Holtmann <marcel@holtmann.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 2 as
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published by the Free Software Foundation;
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
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CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
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COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
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SOFTWARE IS DISCLAIMED.
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*/
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/*
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* RFCOMM TTY.
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*
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* $Id: tty.c,v 1.24 2002/10/03 01:54:38 holtmann Exp $
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/tty.h>
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#include <linux/tty_driver.h>
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#include <linux/tty_flip.h>
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#include <linux/slab.h>
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#include <linux/skbuff.h>
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/rfcomm.h>
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#ifndef CONFIG_BT_RFCOMM_DEBUG
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#undef BT_DBG
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#define BT_DBG(D...)
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#endif
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#define RFCOMM_TTY_MAGIC 0x6d02 /* magic number for rfcomm struct */
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#define RFCOMM_TTY_PORTS RFCOMM_MAX_DEV /* whole lotta rfcomm devices */
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#define RFCOMM_TTY_MAJOR 216 /* device node major id of the usb/bluetooth.c driver */
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#define RFCOMM_TTY_MINOR 0
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static struct tty_driver *rfcomm_tty_driver;
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struct rfcomm_dev {
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struct list_head list;
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atomic_t refcnt;
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char name[12];
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int id;
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unsigned long flags;
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int opened;
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int err;
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bdaddr_t src;
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bdaddr_t dst;
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u8 channel;
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uint modem_status;
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struct rfcomm_dlc *dlc;
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struct tty_struct *tty;
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wait_queue_head_t wait;
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struct tasklet_struct wakeup_task;
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atomic_t wmem_alloc;
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};
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static LIST_HEAD(rfcomm_dev_list);
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static DEFINE_RWLOCK(rfcomm_dev_lock);
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static void rfcomm_dev_data_ready(struct rfcomm_dlc *dlc, struct sk_buff *skb);
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static void rfcomm_dev_state_change(struct rfcomm_dlc *dlc, int err);
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static void rfcomm_dev_modem_status(struct rfcomm_dlc *dlc, u8 v24_sig);
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static void rfcomm_tty_wakeup(unsigned long arg);
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/* ---- Device functions ---- */
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static void rfcomm_dev_destruct(struct rfcomm_dev *dev)
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{
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struct rfcomm_dlc *dlc = dev->dlc;
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BT_DBG("dev %p dlc %p", dev, dlc);
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rfcomm_dlc_lock(dlc);
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/* Detach DLC if it's owned by this dev */
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if (dlc->owner == dev)
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dlc->owner = NULL;
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rfcomm_dlc_unlock(dlc);
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rfcomm_dlc_put(dlc);
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tty_unregister_device(rfcomm_tty_driver, dev->id);
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/* Refcount should only hit zero when called from rfcomm_dev_del()
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which will have taken us off the list. Everything else are
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refcounting bugs. */
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BUG_ON(!list_empty(&dev->list));
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kfree(dev);
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/* It's safe to call module_put() here because socket still
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holds reference to this module. */
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module_put(THIS_MODULE);
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}
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static inline void rfcomm_dev_hold(struct rfcomm_dev *dev)
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{
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atomic_inc(&dev->refcnt);
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}
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static inline void rfcomm_dev_put(struct rfcomm_dev *dev)
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{
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/* The reason this isn't actually a race, as you no
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doubt have a little voice screaming at you in your
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head, is that the refcount should never actually
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reach zero unless the device has already been taken
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off the list, in rfcomm_dev_del(). And if that's not
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true, we'll hit the BUG() in rfcomm_dev_destruct()
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anyway. */
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if (atomic_dec_and_test(&dev->refcnt))
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rfcomm_dev_destruct(dev);
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}
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static struct rfcomm_dev *__rfcomm_dev_get(int id)
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{
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struct rfcomm_dev *dev;
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struct list_head *p;
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list_for_each(p, &rfcomm_dev_list) {
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dev = list_entry(p, struct rfcomm_dev, list);
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if (dev->id == id)
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return dev;
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}
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return NULL;
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}
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static inline struct rfcomm_dev *rfcomm_dev_get(int id)
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{
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struct rfcomm_dev *dev;
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read_lock(&rfcomm_dev_lock);
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dev = __rfcomm_dev_get(id);
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if (dev)
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rfcomm_dev_hold(dev);
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read_unlock(&rfcomm_dev_lock);
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return dev;
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}
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static int rfcomm_dev_add(struct rfcomm_dev_req *req, struct rfcomm_dlc *dlc)
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{
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struct rfcomm_dev *dev;
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struct list_head *head = &rfcomm_dev_list, *p;
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int err = 0;
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BT_DBG("id %d channel %d", req->dev_id, req->channel);
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dev = kmalloc(sizeof(struct rfcomm_dev), GFP_KERNEL);
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if (!dev)
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return -ENOMEM;
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memset(dev, 0, sizeof(struct rfcomm_dev));
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write_lock_bh(&rfcomm_dev_lock);
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if (req->dev_id < 0) {
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dev->id = 0;
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list_for_each(p, &rfcomm_dev_list) {
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if (list_entry(p, struct rfcomm_dev, list)->id != dev->id)
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break;
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dev->id++;
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head = p;
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}
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} else {
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dev->id = req->dev_id;
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list_for_each(p, &rfcomm_dev_list) {
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struct rfcomm_dev *entry = list_entry(p, struct rfcomm_dev, list);
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if (entry->id == dev->id) {
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err = -EADDRINUSE;
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goto out;
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}
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if (entry->id > dev->id - 1)
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break;
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head = p;
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}
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}
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if ((dev->id < 0) || (dev->id > RFCOMM_MAX_DEV - 1)) {
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err = -ENFILE;
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goto out;
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}
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sprintf(dev->name, "rfcomm%d", dev->id);
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list_add(&dev->list, head);
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atomic_set(&dev->refcnt, 1);
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bacpy(&dev->src, &req->src);
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bacpy(&dev->dst, &req->dst);
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dev->channel = req->channel;
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dev->flags = req->flags &
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((1 << RFCOMM_RELEASE_ONHUP) | (1 << RFCOMM_REUSE_DLC));
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init_waitqueue_head(&dev->wait);
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tasklet_init(&dev->wakeup_task, rfcomm_tty_wakeup, (unsigned long) dev);
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rfcomm_dlc_lock(dlc);
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dlc->data_ready = rfcomm_dev_data_ready;
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dlc->state_change = rfcomm_dev_state_change;
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dlc->modem_status = rfcomm_dev_modem_status;
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dlc->owner = dev;
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dev->dlc = dlc;
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rfcomm_dlc_unlock(dlc);
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/* It's safe to call __module_get() here because socket already
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holds reference to this module. */
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__module_get(THIS_MODULE);
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out:
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write_unlock_bh(&rfcomm_dev_lock);
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if (err) {
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kfree(dev);
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return err;
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}
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tty_register_device(rfcomm_tty_driver, dev->id, NULL);
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return dev->id;
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}
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static void rfcomm_dev_del(struct rfcomm_dev *dev)
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{
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BT_DBG("dev %p", dev);
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write_lock_bh(&rfcomm_dev_lock);
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list_del_init(&dev->list);
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write_unlock_bh(&rfcomm_dev_lock);
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rfcomm_dev_put(dev);
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}
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/* ---- Send buffer ---- */
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static inline unsigned int rfcomm_room(struct rfcomm_dlc *dlc)
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{
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/* We can't let it be zero, because we don't get a callback
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when tx_credits becomes nonzero, hence we'd never wake up */
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return dlc->mtu * (dlc->tx_credits?:1);
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}
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static void rfcomm_wfree(struct sk_buff *skb)
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{
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struct rfcomm_dev *dev = (void *) skb->sk;
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atomic_sub(skb->truesize, &dev->wmem_alloc);
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if (test_bit(RFCOMM_TTY_ATTACHED, &dev->flags))
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tasklet_schedule(&dev->wakeup_task);
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rfcomm_dev_put(dev);
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}
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static inline void rfcomm_set_owner_w(struct sk_buff *skb, struct rfcomm_dev *dev)
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{
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rfcomm_dev_hold(dev);
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atomic_add(skb->truesize, &dev->wmem_alloc);
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skb->sk = (void *) dev;
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skb->destructor = rfcomm_wfree;
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}
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static struct sk_buff *rfcomm_wmalloc(struct rfcomm_dev *dev, unsigned long size, int priority)
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{
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if (atomic_read(&dev->wmem_alloc) < rfcomm_room(dev->dlc)) {
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struct sk_buff *skb = alloc_skb(size, priority);
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if (skb) {
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rfcomm_set_owner_w(skb, dev);
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return skb;
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}
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}
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return NULL;
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}
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/* ---- Device IOCTLs ---- */
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#define NOCAP_FLAGS ((1 << RFCOMM_REUSE_DLC) | (1 << RFCOMM_RELEASE_ONHUP))
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static int rfcomm_create_dev(struct sock *sk, void __user *arg)
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{
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struct rfcomm_dev_req req;
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struct rfcomm_dlc *dlc;
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int id;
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if (copy_from_user(&req, arg, sizeof(req)))
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return -EFAULT;
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BT_DBG("sk %p dev_id %id flags 0x%x", sk, req.dev_id, req.flags);
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if (req.flags != NOCAP_FLAGS && !capable(CAP_NET_ADMIN))
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return -EPERM;
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if (req.flags & (1 << RFCOMM_REUSE_DLC)) {
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/* Socket must be connected */
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if (sk->sk_state != BT_CONNECTED)
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return -EBADFD;
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dlc = rfcomm_pi(sk)->dlc;
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rfcomm_dlc_hold(dlc);
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} else {
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dlc = rfcomm_dlc_alloc(GFP_KERNEL);
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if (!dlc)
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return -ENOMEM;
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}
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id = rfcomm_dev_add(&req, dlc);
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if (id < 0) {
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rfcomm_dlc_put(dlc);
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return id;
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}
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if (req.flags & (1 << RFCOMM_REUSE_DLC)) {
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/* DLC is now used by device.
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* Socket must be disconnected */
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sk->sk_state = BT_CLOSED;
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}
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return id;
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}
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static int rfcomm_release_dev(void __user *arg)
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{
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struct rfcomm_dev_req req;
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struct rfcomm_dev *dev;
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if (copy_from_user(&req, arg, sizeof(req)))
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return -EFAULT;
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BT_DBG("dev_id %id flags 0x%x", req.dev_id, req.flags);
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if (!(dev = rfcomm_dev_get(req.dev_id)))
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return -ENODEV;
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if (dev->flags != NOCAP_FLAGS && !capable(CAP_NET_ADMIN)) {
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rfcomm_dev_put(dev);
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return -EPERM;
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}
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if (req.flags & (1 << RFCOMM_HANGUP_NOW))
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rfcomm_dlc_close(dev->dlc, 0);
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rfcomm_dev_del(dev);
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rfcomm_dev_put(dev);
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return 0;
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}
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static int rfcomm_get_dev_list(void __user *arg)
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{
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struct rfcomm_dev_list_req *dl;
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struct rfcomm_dev_info *di;
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struct list_head *p;
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int n = 0, size, err;
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u16 dev_num;
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BT_DBG("");
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if (get_user(dev_num, (u16 __user *) arg))
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return -EFAULT;
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if (!dev_num || dev_num > (PAGE_SIZE * 4) / sizeof(*di))
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return -EINVAL;
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size = sizeof(*dl) + dev_num * sizeof(*di);
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if (!(dl = kmalloc(size, GFP_KERNEL)))
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return -ENOMEM;
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di = dl->dev_info;
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read_lock_bh(&rfcomm_dev_lock);
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list_for_each(p, &rfcomm_dev_list) {
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struct rfcomm_dev *dev = list_entry(p, struct rfcomm_dev, list);
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(di + n)->id = dev->id;
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(di + n)->flags = dev->flags;
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(di + n)->state = dev->dlc->state;
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(di + n)->channel = dev->channel;
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bacpy(&(di + n)->src, &dev->src);
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bacpy(&(di + n)->dst, &dev->dst);
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if (++n >= dev_num)
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break;
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}
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read_unlock_bh(&rfcomm_dev_lock);
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dl->dev_num = n;
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size = sizeof(*dl) + n * sizeof(*di);
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err = copy_to_user(arg, dl, size);
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kfree(dl);
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return err ? -EFAULT : 0;
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}
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static int rfcomm_get_dev_info(void __user *arg)
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{
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struct rfcomm_dev *dev;
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struct rfcomm_dev_info di;
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int err = 0;
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BT_DBG("");
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if (copy_from_user(&di, arg, sizeof(di)))
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return -EFAULT;
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if (!(dev = rfcomm_dev_get(di.id)))
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return -ENODEV;
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di.flags = dev->flags;
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di.channel = dev->channel;
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di.state = dev->dlc->state;
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bacpy(&di.src, &dev->src);
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bacpy(&di.dst, &dev->dst);
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if (copy_to_user(arg, &di, sizeof(di)))
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err = -EFAULT;
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rfcomm_dev_put(dev);
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return err;
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}
|
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|
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int rfcomm_dev_ioctl(struct sock *sk, unsigned int cmd, void __user *arg)
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{
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BT_DBG("cmd %d arg %p", cmd, arg);
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|
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switch (cmd) {
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case RFCOMMCREATEDEV:
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return rfcomm_create_dev(sk, arg);
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|
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case RFCOMMRELEASEDEV:
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return rfcomm_release_dev(arg);
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|
|
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case RFCOMMGETDEVLIST:
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return rfcomm_get_dev_list(arg);
|
|
|
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case RFCOMMGETDEVINFO:
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return rfcomm_get_dev_info(arg);
|
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}
|
|
|
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return -EINVAL;
|
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}
|
|
|
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/* ---- DLC callbacks ---- */
|
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static void rfcomm_dev_data_ready(struct rfcomm_dlc *dlc, struct sk_buff *skb)
|
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{
|
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struct rfcomm_dev *dev = dlc->owner;
|
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struct tty_struct *tty;
|
|
|
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if (!dev || !(tty = dev->tty)) {
|
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kfree_skb(skb);
|
|
return;
|
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}
|
|
|
|
BT_DBG("dlc %p tty %p len %d", dlc, tty, skb->len);
|
|
|
|
if (test_bit(TTY_DONT_FLIP, &tty->flags)) {
|
|
register int i;
|
|
for (i = 0; i < skb->len; i++) {
|
|
if (tty->flip.count >= TTY_FLIPBUF_SIZE)
|
|
tty_flip_buffer_push(tty);
|
|
|
|
tty_insert_flip_char(tty, skb->data[i], 0);
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|
}
|
|
tty_flip_buffer_push(tty);
|
|
} else
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|
tty->ldisc.receive_buf(tty, skb->data, NULL, skb->len);
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|
|
|
kfree_skb(skb);
|
|
}
|
|
|
|
static void rfcomm_dev_state_change(struct rfcomm_dlc *dlc, int err)
|
|
{
|
|
struct rfcomm_dev *dev = dlc->owner;
|
|
if (!dev)
|
|
return;
|
|
|
|
BT_DBG("dlc %p dev %p err %d", dlc, dev, err);
|
|
|
|
dev->err = err;
|
|
wake_up_interruptible(&dev->wait);
|
|
|
|
if (dlc->state == BT_CLOSED) {
|
|
if (!dev->tty) {
|
|
if (test_bit(RFCOMM_RELEASE_ONHUP, &dev->flags)) {
|
|
rfcomm_dev_hold(dev);
|
|
rfcomm_dev_del(dev);
|
|
|
|
/* We have to drop DLC lock here, otherwise
|
|
rfcomm_dev_put() will dead lock if it's
|
|
the last reference. */
|
|
rfcomm_dlc_unlock(dlc);
|
|
rfcomm_dev_put(dev);
|
|
rfcomm_dlc_lock(dlc);
|
|
}
|
|
} else
|
|
tty_hangup(dev->tty);
|
|
}
|
|
}
|
|
|
|
static void rfcomm_dev_modem_status(struct rfcomm_dlc *dlc, u8 v24_sig)
|
|
{
|
|
struct rfcomm_dev *dev = dlc->owner;
|
|
if (!dev)
|
|
return;
|
|
|
|
BT_DBG("dlc %p dev %p v24_sig 0x%02x", dlc, dev, v24_sig);
|
|
|
|
dev->modem_status =
|
|
((v24_sig & RFCOMM_V24_RTC) ? (TIOCM_DSR | TIOCM_DTR) : 0) |
|
|
((v24_sig & RFCOMM_V24_RTR) ? (TIOCM_RTS | TIOCM_CTS) : 0) |
|
|
((v24_sig & RFCOMM_V24_IC) ? TIOCM_RI : 0) |
|
|
((v24_sig & RFCOMM_V24_DV) ? TIOCM_CD : 0);
|
|
}
|
|
|
|
/* ---- TTY functions ---- */
|
|
static void rfcomm_tty_wakeup(unsigned long arg)
|
|
{
|
|
struct rfcomm_dev *dev = (void *) arg;
|
|
struct tty_struct *tty = dev->tty;
|
|
if (!tty)
|
|
return;
|
|
|
|
BT_DBG("dev %p tty %p", dev, tty);
|
|
|
|
if (test_bit(TTY_DO_WRITE_WAKEUP, &tty->flags) && tty->ldisc.write_wakeup)
|
|
(tty->ldisc.write_wakeup)(tty);
|
|
|
|
wake_up_interruptible(&tty->write_wait);
|
|
#ifdef SERIAL_HAVE_POLL_WAIT
|
|
wake_up_interruptible(&tty->poll_wait);
|
|
#endif
|
|
}
|
|
|
|
static int rfcomm_tty_open(struct tty_struct *tty, struct file *filp)
|
|
{
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
struct rfcomm_dev *dev;
|
|
struct rfcomm_dlc *dlc;
|
|
int err, id;
|
|
|
|
id = tty->index;
|
|
|
|
BT_DBG("tty %p id %d", tty, id);
|
|
|
|
/* We don't leak this refcount. For reasons which are not entirely
|
|
clear, the TTY layer will call our ->close() method even if the
|
|
open fails. We decrease the refcount there, and decreasing it
|
|
here too would cause breakage. */
|
|
dev = rfcomm_dev_get(id);
|
|
if (!dev)
|
|
return -ENODEV;
|
|
|
|
BT_DBG("dev %p dst %s channel %d opened %d", dev, batostr(&dev->dst), dev->channel, dev->opened);
|
|
|
|
if (dev->opened++ != 0)
|
|
return 0;
|
|
|
|
dlc = dev->dlc;
|
|
|
|
/* Attach TTY and open DLC */
|
|
|
|
rfcomm_dlc_lock(dlc);
|
|
tty->driver_data = dev;
|
|
dev->tty = tty;
|
|
rfcomm_dlc_unlock(dlc);
|
|
set_bit(RFCOMM_TTY_ATTACHED, &dev->flags);
|
|
|
|
err = rfcomm_dlc_open(dlc, &dev->src, &dev->dst, dev->channel);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
/* Wait for DLC to connect */
|
|
add_wait_queue(&dev->wait, &wait);
|
|
while (1) {
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
|
|
if (dlc->state == BT_CLOSED) {
|
|
err = -dev->err;
|
|
break;
|
|
}
|
|
|
|
if (dlc->state == BT_CONNECTED)
|
|
break;
|
|
|
|
if (signal_pending(current)) {
|
|
err = -EINTR;
|
|
break;
|
|
}
|
|
|
|
schedule();
|
|
}
|
|
set_current_state(TASK_RUNNING);
|
|
remove_wait_queue(&dev->wait, &wait);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void rfcomm_tty_close(struct tty_struct *tty, struct file *filp)
|
|
{
|
|
struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
|
|
if (!dev)
|
|
return;
|
|
|
|
BT_DBG("tty %p dev %p dlc %p opened %d", tty, dev, dev->dlc, dev->opened);
|
|
|
|
if (--dev->opened == 0) {
|
|
/* Close DLC and dettach TTY */
|
|
rfcomm_dlc_close(dev->dlc, 0);
|
|
|
|
clear_bit(RFCOMM_TTY_ATTACHED, &dev->flags);
|
|
tasklet_kill(&dev->wakeup_task);
|
|
|
|
rfcomm_dlc_lock(dev->dlc);
|
|
tty->driver_data = NULL;
|
|
dev->tty = NULL;
|
|
rfcomm_dlc_unlock(dev->dlc);
|
|
}
|
|
|
|
rfcomm_dev_put(dev);
|
|
}
|
|
|
|
static int rfcomm_tty_write(struct tty_struct *tty, const unsigned char *buf, int count)
|
|
{
|
|
struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
|
|
struct rfcomm_dlc *dlc = dev->dlc;
|
|
struct sk_buff *skb;
|
|
int err = 0, sent = 0, size;
|
|
|
|
BT_DBG("tty %p count %d", tty, count);
|
|
|
|
while (count) {
|
|
size = min_t(uint, count, dlc->mtu);
|
|
|
|
skb = rfcomm_wmalloc(dev, size + RFCOMM_SKB_RESERVE, GFP_ATOMIC);
|
|
|
|
if (!skb)
|
|
break;
|
|
|
|
skb_reserve(skb, RFCOMM_SKB_HEAD_RESERVE);
|
|
|
|
memcpy(skb_put(skb, size), buf + sent, size);
|
|
|
|
if ((err = rfcomm_dlc_send(dlc, skb)) < 0) {
|
|
kfree_skb(skb);
|
|
break;
|
|
}
|
|
|
|
sent += size;
|
|
count -= size;
|
|
}
|
|
|
|
return sent ? sent : err;
|
|
}
|
|
|
|
static int rfcomm_tty_write_room(struct tty_struct *tty)
|
|
{
|
|
struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
|
|
int room;
|
|
|
|
BT_DBG("tty %p", tty);
|
|
|
|
room = rfcomm_room(dev->dlc) - atomic_read(&dev->wmem_alloc);
|
|
if (room < 0)
|
|
room = 0;
|
|
return room;
|
|
}
|
|
|
|
static int rfcomm_tty_ioctl(struct tty_struct *tty, struct file *filp, unsigned int cmd, unsigned long arg)
|
|
{
|
|
BT_DBG("tty %p cmd 0x%02x", tty, cmd);
|
|
|
|
switch (cmd) {
|
|
case TCGETS:
|
|
BT_DBG("TCGETS is not supported");
|
|
return -ENOIOCTLCMD;
|
|
|
|
case TCSETS:
|
|
BT_DBG("TCSETS is not supported");
|
|
return -ENOIOCTLCMD;
|
|
|
|
case TIOCMIWAIT:
|
|
BT_DBG("TIOCMIWAIT");
|
|
break;
|
|
|
|
case TIOCGICOUNT:
|
|
BT_DBG("TIOCGICOUNT");
|
|
break;
|
|
|
|
case TIOCGSERIAL:
|
|
BT_ERR("TIOCGSERIAL is not supported");
|
|
return -ENOIOCTLCMD;
|
|
|
|
case TIOCSSERIAL:
|
|
BT_ERR("TIOCSSERIAL is not supported");
|
|
return -ENOIOCTLCMD;
|
|
|
|
case TIOCSERGSTRUCT:
|
|
BT_ERR("TIOCSERGSTRUCT is not supported");
|
|
return -ENOIOCTLCMD;
|
|
|
|
case TIOCSERGETLSR:
|
|
BT_ERR("TIOCSERGETLSR is not supported");
|
|
return -ENOIOCTLCMD;
|
|
|
|
case TIOCSERCONFIG:
|
|
BT_ERR("TIOCSERCONFIG is not supported");
|
|
return -ENOIOCTLCMD;
|
|
|
|
default:
|
|
return -ENOIOCTLCMD; /* ioctls which we must ignore */
|
|
|
|
}
|
|
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
|
|
#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
|
|
|
|
static void rfcomm_tty_set_termios(struct tty_struct *tty, struct termios *old)
|
|
{
|
|
BT_DBG("tty %p", tty);
|
|
|
|
if ((tty->termios->c_cflag == old->c_cflag) &&
|
|
(RELEVANT_IFLAG(tty->termios->c_iflag) == RELEVANT_IFLAG(old->c_iflag)))
|
|
return;
|
|
|
|
/* handle turning off CRTSCTS */
|
|
if ((old->c_cflag & CRTSCTS) && !(tty->termios->c_cflag & CRTSCTS)) {
|
|
BT_DBG("turning off CRTSCTS");
|
|
}
|
|
}
|
|
|
|
static void rfcomm_tty_throttle(struct tty_struct *tty)
|
|
{
|
|
struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
|
|
|
|
BT_DBG("tty %p dev %p", tty, dev);
|
|
|
|
rfcomm_dlc_throttle(dev->dlc);
|
|
}
|
|
|
|
static void rfcomm_tty_unthrottle(struct tty_struct *tty)
|
|
{
|
|
struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
|
|
|
|
BT_DBG("tty %p dev %p", tty, dev);
|
|
|
|
rfcomm_dlc_unthrottle(dev->dlc);
|
|
}
|
|
|
|
static int rfcomm_tty_chars_in_buffer(struct tty_struct *tty)
|
|
{
|
|
struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
|
|
struct rfcomm_dlc *dlc = dev->dlc;
|
|
|
|
BT_DBG("tty %p dev %p", tty, dev);
|
|
|
|
if (skb_queue_len(&dlc->tx_queue))
|
|
return dlc->mtu;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void rfcomm_tty_flush_buffer(struct tty_struct *tty)
|
|
{
|
|
struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
|
|
if (!dev)
|
|
return;
|
|
|
|
BT_DBG("tty %p dev %p", tty, dev);
|
|
|
|
skb_queue_purge(&dev->dlc->tx_queue);
|
|
|
|
if (test_bit(TTY_DO_WRITE_WAKEUP, &tty->flags) && tty->ldisc.write_wakeup)
|
|
tty->ldisc.write_wakeup(tty);
|
|
}
|
|
|
|
static void rfcomm_tty_send_xchar(struct tty_struct *tty, char ch)
|
|
{
|
|
BT_DBG("tty %p ch %c", tty, ch);
|
|
}
|
|
|
|
static void rfcomm_tty_wait_until_sent(struct tty_struct *tty, int timeout)
|
|
{
|
|
BT_DBG("tty %p timeout %d", tty, timeout);
|
|
}
|
|
|
|
static void rfcomm_tty_hangup(struct tty_struct *tty)
|
|
{
|
|
struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
|
|
if (!dev)
|
|
return;
|
|
|
|
BT_DBG("tty %p dev %p", tty, dev);
|
|
|
|
rfcomm_tty_flush_buffer(tty);
|
|
|
|
if (test_bit(RFCOMM_RELEASE_ONHUP, &dev->flags))
|
|
rfcomm_dev_del(dev);
|
|
}
|
|
|
|
static int rfcomm_tty_read_proc(char *buf, char **start, off_t offset, int len, int *eof, void *unused)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int rfcomm_tty_tiocmget(struct tty_struct *tty, struct file *filp)
|
|
{
|
|
struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
|
|
|
|
BT_DBG("tty %p dev %p", tty, dev);
|
|
|
|
return dev->modem_status;
|
|
}
|
|
|
|
static int rfcomm_tty_tiocmset(struct tty_struct *tty, struct file *filp, unsigned int set, unsigned int clear)
|
|
{
|
|
struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
|
|
struct rfcomm_dlc *dlc = dev->dlc;
|
|
u8 v24_sig;
|
|
|
|
BT_DBG("tty %p dev %p set 0x%02x clear 0x%02x", tty, dev, set, clear);
|
|
|
|
rfcomm_dlc_get_modem_status(dlc, &v24_sig);
|
|
|
|
if (set & TIOCM_DSR || set & TIOCM_DTR)
|
|
v24_sig |= RFCOMM_V24_RTC;
|
|
if (set & TIOCM_RTS || set & TIOCM_CTS)
|
|
v24_sig |= RFCOMM_V24_RTR;
|
|
if (set & TIOCM_RI)
|
|
v24_sig |= RFCOMM_V24_IC;
|
|
if (set & TIOCM_CD)
|
|
v24_sig |= RFCOMM_V24_DV;
|
|
|
|
if (clear & TIOCM_DSR || clear & TIOCM_DTR)
|
|
v24_sig &= ~RFCOMM_V24_RTC;
|
|
if (clear & TIOCM_RTS || clear & TIOCM_CTS)
|
|
v24_sig &= ~RFCOMM_V24_RTR;
|
|
if (clear & TIOCM_RI)
|
|
v24_sig &= ~RFCOMM_V24_IC;
|
|
if (clear & TIOCM_CD)
|
|
v24_sig &= ~RFCOMM_V24_DV;
|
|
|
|
rfcomm_dlc_set_modem_status(dlc, v24_sig);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* ---- TTY structure ---- */
|
|
|
|
static struct tty_operations rfcomm_ops = {
|
|
.open = rfcomm_tty_open,
|
|
.close = rfcomm_tty_close,
|
|
.write = rfcomm_tty_write,
|
|
.write_room = rfcomm_tty_write_room,
|
|
.chars_in_buffer = rfcomm_tty_chars_in_buffer,
|
|
.flush_buffer = rfcomm_tty_flush_buffer,
|
|
.ioctl = rfcomm_tty_ioctl,
|
|
.throttle = rfcomm_tty_throttle,
|
|
.unthrottle = rfcomm_tty_unthrottle,
|
|
.set_termios = rfcomm_tty_set_termios,
|
|
.send_xchar = rfcomm_tty_send_xchar,
|
|
.hangup = rfcomm_tty_hangup,
|
|
.wait_until_sent = rfcomm_tty_wait_until_sent,
|
|
.read_proc = rfcomm_tty_read_proc,
|
|
.tiocmget = rfcomm_tty_tiocmget,
|
|
.tiocmset = rfcomm_tty_tiocmset,
|
|
};
|
|
|
|
int rfcomm_init_ttys(void)
|
|
{
|
|
rfcomm_tty_driver = alloc_tty_driver(RFCOMM_TTY_PORTS);
|
|
if (!rfcomm_tty_driver)
|
|
return -1;
|
|
|
|
rfcomm_tty_driver->owner = THIS_MODULE;
|
|
rfcomm_tty_driver->driver_name = "rfcomm";
|
|
rfcomm_tty_driver->devfs_name = "bluetooth/rfcomm/";
|
|
rfcomm_tty_driver->name = "rfcomm";
|
|
rfcomm_tty_driver->major = RFCOMM_TTY_MAJOR;
|
|
rfcomm_tty_driver->minor_start = RFCOMM_TTY_MINOR;
|
|
rfcomm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
|
|
rfcomm_tty_driver->subtype = SERIAL_TYPE_NORMAL;
|
|
rfcomm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
|
|
rfcomm_tty_driver->init_termios = tty_std_termios;
|
|
rfcomm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
|
|
tty_set_operations(rfcomm_tty_driver, &rfcomm_ops);
|
|
|
|
if (tty_register_driver(rfcomm_tty_driver)) {
|
|
BT_ERR("Can't register RFCOMM TTY driver");
|
|
put_tty_driver(rfcomm_tty_driver);
|
|
return -1;
|
|
}
|
|
|
|
BT_INFO("RFCOMM TTY layer initialized");
|
|
|
|
return 0;
|
|
}
|
|
|
|
void rfcomm_cleanup_ttys(void)
|
|
{
|
|
tty_unregister_driver(rfcomm_tty_driver);
|
|
put_tty_driver(rfcomm_tty_driver);
|
|
}
|