#include <linux/spinlock.h>
#include <linux/init.h>
#include <asm/uaccess.h>
+#include <asm/string.h>
#define PPP_VERSION "2.4.2"
#define SC_RCV_BITS (SC_RCV_B7_1|SC_RCV_B7_0|SC_RCV_ODDP|SC_RCV_EVNP)
static int flag_time = HZ;
-MODULE_PARM(flag_time, "i");
+module_param(flag_time, int, 0);
MODULE_PARM_DESC(flag_time, "ppp_async: interval between flagged packets (in clock ticks)");
MODULE_LICENSE("GPL");
MODULE_ALIAS_LDISC(N_PPP);
* FIXME: this is no longer true. The _close path for the ldisc is
* now guaranteed to be sane.
*/
-static rwlock_t disc_data_lock = RW_LOCK_UNLOCKED;
+static DEFINE_RWLOCK(disc_data_lock);
static struct asyncppp *ap_get(struct tty_struct *tty)
{
goto out_free;
tty->disc_data = ap;
-
+ tty->receive_room = 65536;
return 0;
out_free:
*/
static ssize_t
ppp_asynctty_write(struct tty_struct *tty, struct file *file,
- const unsigned char __user *buf, size_t count)
+ const unsigned char *buf, size_t count)
{
return -EAGAIN;
}
return 0;
}
-static int
-ppp_asynctty_room(struct tty_struct *tty)
-{
- return 65535;
-}
-
/*
* This can now be called from hard interrupt level as well
* as soft interrupt level or mainline.
spin_lock_irqsave(&ap->recv_lock, flags);
ppp_async_input(ap, buf, cflags, count);
spin_unlock_irqrestore(&ap->recv_lock, flags);
- if (skb_queue_len(&ap->rqueue))
+ if (!skb_queue_empty(&ap->rqueue))
tasklet_schedule(&ap->tsk);
ap_put(ap);
if (test_and_clear_bit(TTY_THROTTLED, &tty->flags)
.write = ppp_asynctty_write,
.ioctl = ppp_asynctty_ioctl,
.poll = ppp_asynctty_poll,
- .receive_room = ppp_asynctty_room,
.receive_buf = ppp_asynctty_receive,
.write_wakeup = ppp_asynctty_wakeup,
};
if (!tty_stuffed && ap->optr < ap->olim) {
avail = ap->olim - ap->optr;
set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
- sent = tty->driver->write(tty, 0, ap->optr, avail);
+ sent = tty->driver->write(tty, ap->optr, avail);
if (sent < 0)
goto flush; /* error, e.g. loss of CD */
ap->optr += sent;
err:
/* frame had an error, remember that, reset SC_TOSS & SC_ESCAPE */
ap->state = SC_PREV_ERROR;
- if (skb)
+ if (skb) {
+ /* make skb appear as freshly allocated */
skb_trim(skb, 0);
+ skb_reserve(skb, - skb_headroom(skb));
+ }
}
/* Called when the tty driver has data for us. Runs parallel with the
skb = dev_alloc_skb(ap->mru + PPP_HDRLEN + 2);
if (skb == 0)
goto nomem;
- /* Try to get the payload 4-byte aligned */
+ ap->rpkt = skb;
+ }
+ if (skb->len == 0) {
+ /* Try to get the payload 4-byte aligned.
+ * This should match the
+ * PPP_ALLSTATIONS/PPP_UI/compressed tests in
+ * process_input_packet, but we do not have
+ * enough chars here to test buf[1] and buf[2].
+ */
if (buf[0] != PPP_ALLSTATIONS)
skb_reserve(skb, 2 + (buf[0] & 1));
- ap->rpkt = skb;
}
if (n > skb_tailroom(skb)) {
/* packet overflowed MRU */
break;
c = buf[n];
- if (c == PPP_FLAG) {
+ if (flags != NULL && flags[n] != 0) {
+ ap->state |= SC_TOSS;
+ } else if (c == PPP_FLAG) {
process_input_packet(ap);
} else if (c == PPP_ESCAPE) {
ap->state |= SC_ESCAPE;
data += 4;
dlen -= 4;
/* data[0] is code, data[1] is length */
- while (dlen >= 2 && dlen >= data[1]) {
+ while (dlen >= 2 && dlen >= data[1] && data[1] >= 2) {
switch (data[0]) {
case LCP_MRU:
val = (data[2] << 8) + data[3];
static void __exit ppp_async_cleanup(void)
{
- if (tty_register_ldisc(N_PPP, NULL) != 0)
+ if (tty_unregister_ldisc(N_PPP) != 0)
printk(KERN_ERR "failed to unregister PPP line discipline\n");
}