- ppp_dev_xmit_ip(ppp, ppp->tbuf, new_data + PPP_HDRLEN,
- count - PPP_HDRLEN, NPMODE_PASS);
-
- } else {
- ppp_dev_xmit_frame (ppp, ppp->tbuf, new_data, count);
- }
- error = count;
-
-out_free:
- kfree (new_data);
- return error;
-}
-
-/*
- * Process the set-compression ioctl.
- */
-
-static int
-ppp_set_compression (struct ppp *ppp, struct ppp_option_data *odp)
-{
- struct compressor *cp;
- int error, nb;
- unsigned long flags;
- __u8 *ptr;
- __u8 ccp_option[CCP_MAX_OPTION_LENGTH];
- struct ppp_option_data data;
-
-/*
- * Fetch the compression parameters
- */
- COPY_FROM_USER (error, &data, odp, sizeof (data));
- if (error != 0)
- return error;
-
- nb = data.length;
- ptr = data.ptr;
- if ((__u32) nb >= (__u32)CCP_MAX_OPTION_LENGTH)
- nb = CCP_MAX_OPTION_LENGTH;
-
- COPY_FROM_USER (error, ccp_option, ptr, nb);
- if (error != 0)
- return error;
-
- if (ccp_option[1] < 2) /* preliminary check on the length byte */
- return (-EINVAL);
-
- save_flags(flags);
- cli();
- ppp->flags &= ~(data.transmit? SC_COMP_RUN: SC_DECOMP_RUN);
- restore_flags(flags);
-
- cp = find_compressor (ccp_option[0]);
-#ifdef CONFIG_KERNELD
- if (cp == NULL) {
- char modname[32];
- sprintf(modname, "ppp-compress-%d", ccp_option[0]);
- request_module(modname);
- cp = find_compressor(ccp_option[0]);
- }
-#endif /* CONFIG_KERNELD */
-
- if (cp == NULL)
- goto out_no_comp;
- /*
- * Found a handler for the protocol - try to allocate
- * a compressor or decompressor.
- */
- error = 0;
- if (data.transmit) {
- if (ppp->sc_xc_state != NULL)
- (*ppp->sc_xcomp->comp_free)(ppp->sc_xc_state);
- ppp->sc_xc_state = NULL;
-
- ppp->sc_xcomp = cp;
- ppp->sc_xc_state = cp->comp_alloc(ccp_option, nb);
- if (ppp->sc_xc_state == NULL) {
- printk(KERN_WARNING "%s: comp_alloc failed\n",
- ppp->name);
- error = -ENOBUFS;
- } else if (ppp->flags & SC_DEBUG)
- printk(KERN_DEBUG "%s: comp_alloc -> %p\n",
- ppp->name, ppp->sc_xc_state);
- } else {
- if (ppp->sc_rc_state != NULL)
- (*ppp->sc_rcomp->decomp_free)(ppp->sc_rc_state);
- ppp->sc_rc_state = NULL;
-
- ppp->sc_rcomp = cp;
- ppp->sc_rc_state = cp->decomp_alloc(ccp_option, nb);
- if (ppp->sc_rc_state == NULL) {
- printk(KERN_WARNING "%s: decomp_alloc failed\n",
- ppp->name);
- error = -ENOBUFS;
- } else if (ppp->flags & SC_DEBUG)
- printk(KERN_DEBUG "%s: decomp_alloc -> %p\n",
- ppp->name, ppp->sc_rc_state);
- }
- return error;
-
-out_no_comp:
- if (ppp->flags & SC_DEBUG)
- printk(KERN_DEBUG "%s: no compressor for [%x %x %x], %x\n",
- ppp->name, ccp_option[0], ccp_option[1],
- ccp_option[2], nb);
- return (-EINVAL); /* no handler found */
-}
-
-/*
- * Process the IOCTL event for the tty device.
- */
-
-static int
-ppp_tty_ioctl (struct tty_struct *tty, struct file * file,
- unsigned int param2, unsigned long param3)
-{
- struct ppp *ppp = tty2ppp (tty);
- register int temp_i = 0, oldflags;
- int error = 0;
- unsigned long flags;
-/*
- * Verify the status of the PPP device.
- */
- if (!ppp)
- return -EBADF;
-
- if (ppp->magic != PPP_MAGIC)
- return -EBADF;
-
- CHECK_PPP (-ENXIO);
-/*
- * The user must have an euid of root to do these requests.
- */
- if (!suser ())
- return -EPERM;
-/*
- * Set the MRU value
- */
- switch (param2) {
- case PPPIOCSMRU:
- GET_USER (error, temp_i, (int *) param3);
- if (error != 0)
- break;
- if (ppp->flags & SC_DEBUG)
- printk (KERN_INFO
- "ppp_tty_ioctl: set mru to %x\n", temp_i);
-
- if (ppp->mru != temp_i)
- ppp_changedmtu (ppp, ppp2dev (ppp)->mtu, temp_i);
- break;
-/*
- * Fetch the flags
- */
- case PPPIOCGFLAGS:
- temp_i = (ppp->flags & SC_MASK);
-#ifndef CHECK_CHARACTERS /* Don't generate errors if we don't check chars. */
- temp_i |= SC_RCV_B7_1 | SC_RCV_B7_0 |
- SC_RCV_ODDP | SC_RCV_EVNP;
-#endif
- PUT_USER (error, temp_i, (int *) param3);
- break;
-/*
- * Set the flags for the various options
- */
- case PPPIOCSFLAGS:
- GET_USER (error, temp_i, (int *) param3);
- if (error != 0)
- break;
- temp_i &= SC_MASK;
-
- if ((ppp->flags & SC_CCP_OPEN) && (temp_i & SC_CCP_OPEN) == 0)
- ppp_ccp_closed(ppp);
-
- save_flags(flags);
- cli();
- oldflags = ppp->flags;
- ppp->flags = temp_i |= (ppp->flags & ~SC_MASK);
- restore_flags(flags);
- if ((oldflags | temp_i) & SC_DEBUG)
- printk (KERN_INFO
- "ppp_tty_ioctl: set flags to %x\n", temp_i);
- break;
-/*
- * Set the compression mode
- */
- case PPPIOCSCOMPRESS:
- error = ppp_set_compression (ppp,
- (struct ppp_option_data *) param3);
- break;
-/*
- * Retrieve the transmit async map
- */
- case PPPIOCGASYNCMAP:
- PUT_USER (error, ppp->xmit_async_map[0], (int *) param3);
- break;
-/*
- * Set the transmit async map
- */
- case PPPIOCSASYNCMAP:
- GET_USER (error, temp_i, (int *) param3);
- if (error != 0)
- break;
- ppp->xmit_async_map[0] = temp_i;
- if (ppp->flags & SC_DEBUG)
- printk (KERN_INFO
- "ppp_tty_ioctl: set xmit asyncmap %x\n",
- ppp->xmit_async_map[0]);
- break;
-/*
- * Set the receive async map
- */
- case PPPIOCSRASYNCMAP:
- GET_USER (error, temp_i, (int *) param3);
- if (error != 0)
- break;
- ppp->recv_async_map = temp_i;
- if (ppp->flags & SC_DEBUG)
- printk (KERN_INFO
- "ppp_tty_ioctl: set rcv asyncmap %x\n",
- ppp->recv_async_map);
- break;
-/*
- * Obtain the unit number for this device.
- */
- case PPPIOCGUNIT:
- PUT_USER (error, ppp2dev (ppp)->base_addr, (int *) param3);
- if (error != 0)
- break;
- if (ppp->flags & SC_DEBUG)
- printk (KERN_INFO
- "ppp_tty_ioctl: get unit: %ld\n",
- ppp2dev (ppp)->base_addr);
- break;
-/*
- * Set the debug level
- */
- case PPPIOCSDEBUG:
- GET_USER (error, temp_i, (int *) param3);
- if (error != 0)
- break;
- temp_i = (temp_i & 0x1F) << 16;
- temp_i |= (ppp->flags & ~0x1F0000);
-
- if ((ppp->flags | temp_i) & SC_DEBUG)
- printk (KERN_INFO
- "ppp_tty_ioctl: set flags to %x\n", temp_i);
- ppp->flags = temp_i;
- break;
-/*
- * Get the debug level
- */
- case PPPIOCGDEBUG:
- temp_i = (ppp->flags >> 16) & 0x1F;
- PUT_USER (error, temp_i, (int *) param3);
- break;
-/*
- * Get the times since the last send/receive frame operation
- */
- case PPPIOCGIDLE:
- {
- struct ppp_idle cur_ddinfo;
-
- /* change absolute times to relative times. */
- cur_ddinfo.xmit_idle = (jiffies - ppp->last_xmit) / HZ;
- cur_ddinfo.recv_idle = (jiffies - ppp->last_recv) / HZ;
- COPY_TO_USER (error, (void *) param3, &cur_ddinfo,
- sizeof (cur_ddinfo));
- }
- break;
-/*
- * Retrieve the extended async map
- */
- case PPPIOCGXASYNCMAP:
- COPY_TO_USER (error, (void *) param3, ppp->xmit_async_map,
- sizeof (ppp->xmit_async_map));
- break;
-/*
- * Set the async extended map
- */
- case PPPIOCSXASYNCMAP:
- {
- __u32 temp_tbl[8];
-
- COPY_FROM_USER (error, temp_tbl, (void *) param3,
- sizeof (temp_tbl));
- if (error != 0)
- break;
-
- temp_tbl[1] = 0x00000000;
- temp_tbl[2] &= ~0x40000000;
- temp_tbl[3] |= 0x60000000;
-
- if ((temp_tbl[2] & temp_tbl[3]) != 0 ||
- (temp_tbl[4] & temp_tbl[5]) != 0 ||
- (temp_tbl[6] & temp_tbl[7]) != 0)
- error = -EINVAL;
- else {
- memcpy (ppp->xmit_async_map,
- temp_tbl,
- sizeof (ppp->xmit_async_map));
-
- if (ppp->flags & SC_DEBUG)
- printk (KERN_INFO
- "ppp_tty_ioctl: set xasyncmap\n");