* Dynamic PPP devices by Jim Freeman <jfree@caldera.com>.
* ppp_tty_receive ``noisy-raise-bug'' fixed by Ove Ewerlid <ewerlid@syscon.uu.se>
*
- * ==FILEVERSION 960926==
+ * ==FILEVERSION 970227==
*
* NOTE TO MAINTAINERS:
* If you modify this file at all, please set the number above to the
#define PPP_MAX_DEV 256
#endif
-/* $Id: ppp.c,v 1.9 1996/09/26 06:26:01 paulus Exp $
+/* $Id: ppp.c,v 1.10 1997/03/04 03:29:58 paulus Exp $
* Added dynamic allocation of channels to eliminate
* compiled-in limits on the number of channels.
*
* released under the GNU General Public License Version 2.
*/
+#include <linux/version.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ptrace.h>
+
+#undef VERSION
+/* a nice define to generate linux version numbers */
+#define VERSION(major,minor,patch) (((((major)<<8)+(minor))<<8)+(patch))
+
+#if LINUX_VERSION_CODE < VERSION(2,1,14)
#include <linux/ioport.h>
+#endif
+
#include <linux/in.h>
#include <linux/malloc.h>
#include <linux/tty.h>
#include <linux/signal.h> /* used in new tty drivers */
#include <asm/system.h>
#include <asm/bitops.h>
-#include <asm/segment.h>
#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/netdevice.h>
#define PPP_LQR 0xc025 /* Link Quality Reporting Protocol */
#endif
+#if LINUX_VERSION_CODE >= VERSION(2,1,4)
+#include <asm/segment.h>
+#define GET_USER(error,value,addr) error = get_user(value,addr)
+#define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
+#define PUT_USER(error,value,addr) error = put_user(value,addr)
+#define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
+
+#if LINUX_VERSION_CODE >= VERSION(2,1,5)
+#include <asm/uaccess.h>
+#endif
+
+#else /* 2.0.x and 2.1.x before 2.1.4 */
+
+#define GET_USER(error,value,addr) \
+do { \
+ error = verify_area (VERIFY_READ, (void *) addr, sizeof (value)); \
+ if (error == 0) \
+ value = get_user(addr); \
+} while (0)
+
+#define COPY_FROM_USER(error,dest,src,size) \
+do { \
+ error = verify_area (VERIFY_READ, (void *) src, size); \
+ if (error == 0) \
+ memcpy_fromfs (dest, src, size); \
+} while (0)
+
+#define PUT_USER(error,value,addr) \
+do { \
+ error = verify_area (VERIFY_WRITE, (void *) addr, sizeof (value)); \
+ if (error == 0) \
+ put_user (value, addr); \
+} while (0)
+
+#define COPY_TO_USER(error,dest,src,size) \
+do { \
+ error = verify_area (VERIFY_WRITE, (void *) src, size); \
+ if (error == 0) \
+ memcpy_tofs (dest, src, size); \
+} while (0)
+
+#endif
+
static int ppp_register_compressor (struct compressor *cp);
static void ppp_unregister_compressor (struct compressor *cp);
static int ppp_dev_close (struct device *);
static int ppp_dev_xmit (sk_buff *, struct device *);
static struct enet_statistics *ppp_dev_stats (struct device *);
+
+#if LINUX_VERSION_CODE < VERSION(2,1,15)
static int ppp_dev_header (sk_buff *, struct device *, __u16,
void *, void *, unsigned int);
static int ppp_dev_rebuild (void *eth, struct device *dev,
- unsigned long raddr, struct sk_buff *skb);
+ unsigned long raddr, struct sk_buff *skb);
+#endif
+
/*
* TTY callbacks
*/
static int ppp_tty_write (struct tty_struct *, struct file *, const __u8 *,
unsigned int);
static int ppp_tty_ioctl (struct tty_struct *, struct file *, unsigned int,
- unsigned long);
+ unsigned long);
static int ppp_tty_select (struct tty_struct *tty, struct inode *inode,
struct file *filp, int sel_type, select_table * wait);
static int ppp_tty_open (struct tty_struct *);
static char ppp_warning[] = KERN_WARNING "PPP: ALERT! not INUSE! %d\n";
static char szVersion[] = PPP_VERSION;
-
+
/*
* Information for the protocol decoder
*/
"TCP compression code copyright 1989 Regents of the "
"University of California\n");
#endif
-
+
printk (KERN_INFO
"PPP Dynamic channel allocation code copyright 1995 "
"Caldera, Inc.\n");
/*
* Register the tty discipline
- */
+ */
(void) memset (&ppp_ldisc, 0, sizeof (ppp_ldisc));
ppp_ldisc.magic = TTY_LDISC_MAGIC;
ppp_ldisc.open = ppp_tty_open;
ppp_ldisc.receive_room = ppp_tty_room;
ppp_ldisc.receive_buf = ppp_tty_receive;
ppp_ldisc.write_wakeup = ppp_tty_wakeup;
-
+
status = tty_register_ldisc (N_PPP, &ppp_ldisc);
if (status == 0)
printk (KERN_INFO "PPP line discipline registered.\n");
{
int indx;
+#if LINUX_VERSION_CODE < VERSION(2,1,15)
dev->hard_header = ppp_dev_header;
dev->rebuild_header = ppp_dev_rebuild;
+#endif
+
dev->hard_header_len = PPP_HARD_HDR_LEN;
/* device INFO */
ppp->sc_rc_state = NULL;
}
+#if LINUX_VERSION_CODE < VERSION(2,1,18)
static struct symbol_table ppp_syms = {
#include <linux/symtab_begin.h>
X(ppp_register_compressor),
X(ppp_crc16_table),
#include <linux/symtab_end.h>
};
+#else
+EXPORT_SYMBOL(ppp_register_compressor);
+EXPORT_SYMBOL(ppp_unregister_compressor);
+EXPORT_SYMBOL(ppp_crc16_table);
+#endif
/* called at boot/load time for each ppp device defined in the kernel */
if (first_time) {
first_time = 0;
answer = ppp_first_time();
+#if LINUX_VERSION_CODE < VERSION(2,1,18)
if (answer == 0)
(void) register_symtab (&ppp_syms);
+#endif
}
if (answer == 0)
answer = -ENODEV;
ppp_ccp_closed (ppp);
- /* Ensure that the pppd process is not hanging on select() */
- wake_up_interruptible (&ppp->read_wait);
- wake_up_interruptible (&ppp->write_wait);
+ /* Ensure that the pppd process is not hanging on select() */
+ wake_up_interruptible (&ppp->read_wait);
+ wake_up_interruptible (&ppp->write_wait);
if (tty != NULL && tty->disc_data == ppp)
tty->disc_data = NULL; /* Break the tty->ppp link */
/*
* Tag the frame and kick it to the proper receive routine
*/
+#if LINUX_VERSION_CODE < VERSION(2,1,15)
skb->free = 1;
+#endif
+
ppp->ddinfo.recv_idle = jiffies;
netif_rx (skb);
return 1;
struct ppp *ppp = tty2ppp (tty);
__u8 c;
int len, indx;
+ int error;
#define GETC(c) \
{ \
return -EIO;
CHECK_PPP (-ENXIO);
-
/*
* Acquire the read lock.
*/
* Fake the insertion of the ADDRESS and CONTROL information because these
* were not saved in the buffer.
*/
- put_user (PPP_ALLSTATIONS, buf++);
- put_user (PPP_UI, buf++);
+ PUT_USER (error, (u_char) PPP_ALLSTATIONS, buf);
+ ++buf;
+ PUT_USER (error, (u_char) PPP_UI, buf);
+ ++buf;
indx = len;
/*
*/
while (indx-- > 0) {
GETC (c);
- put_user (c, buf);
+ PUT_USER (error, c, buf);
++buf;
}
ppp_dev_xmit_lower (struct ppp *ppp, struct ppp_buffer *buf,
__u8 *data, int count, int non_ip)
{
- __u16 write_fcs;
+ __u16 write_fcs;
int address, control;
int proto;
}
}
/*
- * Ensure that the caller's buffer is valid.
+ * Retrieve the user's buffer
*/
- status = verify_area (VERIFY_READ, data, count);
+ COPY_FROM_USER (status,
+ new_data,
+ data,
+ count);
+
if (status != 0) {
kfree (new_data);
ppp->tbuf->locked = 0;
return status;
}
-
- memcpy_fromfs (new_data, data, count);
/*
* Change the LQR frame
*/
/*
* Fetch the compression parameters
*/
- error = verify_area (VERIFY_READ, odp, sizeof (data));
- if (error == 0) {
- memcpy_fromfs (&data, odp, sizeof (data));
- nb = data.length;
- ptr = data.ptr;
- if ((__u32) nb >= (__u32)CCP_MAX_OPTION_LENGTH)
- nb = CCP_MAX_OPTION_LENGTH;
-
- error = verify_area (VERIFY_READ, ptr, nb);
- }
+ COPY_FROM_USER (error,
+ &data,
+ odp,
+ sizeof (data));
if (error != 0)
return error;
- memcpy_fromfs (ccp_option, ptr, nb);
+ 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);
static int
ppp_tty_ioctl (struct tty_struct *tty, struct file * file,
- unsigned int param2, unsigned long param3)
+ unsigned int param2, unsigned long param3)
{
struct ppp *ppp = tty2ppp (tty);
register int temp_i = 0;
*/
switch (param2) {
case PPPIOCSMRU:
- error = verify_area (VERIFY_READ, (void *) param3,
- sizeof (temp_i));
+ GET_USER (error, temp_i, (int *) param3);
if (error == 0) {
- temp_i = get_user ((int *) param3);
if (ppp->flags & SC_DEBUG)
printk (KERN_INFO
"ppp_tty_ioctl: set mru to %x\n", temp_i);
* Fetch the flags
*/
case PPPIOCGFLAGS:
- error = verify_area (VERIFY_WRITE, (void *) param3,
- sizeof (temp_i));
- if (error == 0) {
- temp_i = (ppp->flags & SC_MASK);
+ 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;
+ temp_i |= SC_RCV_B7_1 | SC_RCV_B7_0 |
+ SC_RCV_ODDP | SC_RCV_EVNP;
#endif
- put_user (temp_i, (int *) param3);
- }
+ PUT_USER (error, temp_i, (int *) param3);
break;
/*
* Set the flags for the various options
*/
case PPPIOCSFLAGS:
- error = verify_area (VERIFY_READ, (void *) param3,
- sizeof (temp_i));
+ GET_USER (error, temp_i, (int *) param3);
if (error == 0) {
- temp_i = get_user ((int *) param3) & SC_MASK;
+ temp_i &= SC_MASK;
temp_i |= (ppp->flags & ~SC_MASK);
if ((ppp->flags & SC_CCP_OPEN) &&
* Retrieve the transmit async map
*/
case PPPIOCGASYNCMAP:
- error = verify_area (VERIFY_WRITE, (void *) param3,
- sizeof (temp_i));
- if (error == 0) {
- put_user (ppp->xmit_async_map[0], (int *) param3);
- }
+ PUT_USER (error, ppp->xmit_async_map[0], (int *) param3);
break;
/*
* Set the transmit async map
*/
case PPPIOCSASYNCMAP:
- error = verify_area (VERIFY_READ, (void *) param3,
- sizeof (temp_i));
+ GET_USER (error, temp_i, (int *) param3);
if (error == 0) {
- ppp->xmit_async_map[0] = get_user ((int *) param3);
+ ppp->xmit_async_map[0] = temp_i;
if (ppp->flags & SC_DEBUG)
printk (KERN_INFO
"ppp_tty_ioctl: set xmit asyncmap %x\n",
* Set the receive async map
*/
case PPPIOCSRASYNCMAP:
- error = verify_area (VERIFY_READ, (void *) param3,
- sizeof (temp_i));
+ GET_USER (error, temp_i, (int *) param3);
if (error == 0) {
- ppp->recv_async_map = get_user ((int *) param3);
+ ppp->recv_async_map = temp_i;
if (ppp->flags & SC_DEBUG)
printk (KERN_INFO
"ppp_tty_ioctl: set rcv asyncmap %x\n",
* Obtain the unit number for this device.
*/
case PPPIOCGUNIT:
- error = verify_area (VERIFY_WRITE, (void *) param3,
- sizeof (temp_i));
+ PUT_USER (error, ppp2dev (ppp)->base_addr, (int *) param3);
if (error == 0) {
- put_user (ppp2dev (ppp)->base_addr, (int *) param3);
if (ppp->flags & SC_DEBUG)
printk (KERN_INFO
"ppp_tty_ioctl: get unit: %ld\n",
* Set the debug level
*/
case PPPIOCSDEBUG:
- error = verify_area (VERIFY_READ, (void *) param3,
- sizeof (temp_i));
+ GET_USER (error, temp_i, (int *) param3);
if (error == 0) {
- temp_i = (get_user ((int *) param3) & 0x1F) << 16;
+ temp_i = (temp_i & 0x1F) << 16;
temp_i |= (ppp->flags & ~0x1F0000);
if ((ppp->flags | temp_i) & SC_DEBUG)
* Get the debug level
*/
case PPPIOCGDEBUG:
- error = verify_area (VERIFY_WRITE, (void *) param3,
- sizeof (temp_i));
- if (error == 0) {
- temp_i = (ppp->flags >> 16) & 0x1F;
- put_user (temp_i, (int *) param3);
- }
+ 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:
- error = verify_area (VERIFY_WRITE, (void *) param3,
- sizeof (struct ppp_idle));
- if (error == 0) {
+ {
struct ppp_idle cur_ddinfo;
__u32 cur_jiffies = jiffies;
/* change absolute times to relative times. */
cur_ddinfo.xmit_idle = (cur_jiffies - ppp->ddinfo.xmit_idle) / HZ;
cur_ddinfo.recv_idle = (cur_jiffies - ppp->ddinfo.recv_idle) / HZ;
- memcpy_tofs ((void *) param3, &cur_ddinfo,
- sizeof (cur_ddinfo));
+ COPY_TO_USER (error,
+ (void *) param3,
+ &cur_ddinfo,
+ sizeof (cur_ddinfo));
}
break;
/*
* Retrieve the extended async map
*/
case PPPIOCGXASYNCMAP:
- error = verify_area (VERIFY_WRITE,
- (void *) param3,
- sizeof (ppp->xmit_async_map));
- if (error == 0) {
- memcpy_tofs ((void *) param3,
- ppp->xmit_async_map,
- sizeof (ppp->xmit_async_map));
- }
+ COPY_TO_USER (error,
+ (void *) param3,
+ ppp->xmit_async_map,
+ sizeof (ppp->xmit_async_map));
break;
/*
* Set the async extended map
*/
case PPPIOCSXASYNCMAP:
- error = verify_area (VERIFY_READ, (void *) param3,
- sizeof (ppp->xmit_async_map));
- if (error == 0) {
+ {
__u32 temp_tbl[8];
- memcpy_fromfs (temp_tbl, (void *) param3,
- sizeof (ppp->xmit_async_map));
- 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");
+ COPY_FROM_USER (error,
+ temp_tbl,
+ (void *) param3,
+ sizeof (temp_tbl));
+
+ if (error == 0) {
+ 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");
+ }
}
}
break;
* Set the maximum VJ header compression slot number.
*/
case PPPIOCSMAXCID:
- error = verify_area (VERIFY_READ, (void *) param3,
- sizeof (temp_i));
+ GET_USER (error, temp_i, (int *) param3);
if (error == 0) {
- temp_i = get_user ((int *) param3) + 1;
+ temp_i = (temp_i & 255) + 1;
if (ppp->flags & SC_DEBUG)
printk (KERN_INFO
"ppp_tty_ioctl: set maxcid to %d\n",
case PPPIOCGNPMODE:
case PPPIOCSNPMODE:
- error = verify_area (VERIFY_READ, (void *) param3,
- sizeof (struct npioctl));
- if (error == 0) {
+ {
struct npioctl npi;
- memcpy_fromfs (&npi,
- (void *) param3,
- sizeof (npi));
+ COPY_FROM_USER (error,
+ &npi,
+ (void *) param3,
+ sizeof (npi));
+
+ if (error != 0)
+ break;
switch (npi.protocol) {
case PPP_IP:
if (param2 == PPPIOCGNPMODE) {
npi.mode = ppp->sc_npmode[npi.protocol];
- error = verify_area (VERIFY_WRITE,
- (void *) param3,
- sizeof (npi));
- if (error != 0)
- break;
- memcpy_tofs ((void *) param3,
- &npi,
- sizeof (npi));
+ COPY_TO_USER (error,
+ (void *) param3,
+ &npi,
+ sizeof (npi));
break;
}
break;
case FIONREAD:
- error = verify_area (VERIFY_WRITE,
- (void *) param3,
- sizeof (int));
- if (error == 0) {
+ {
int count = ppp->ubuf->tail - ppp->ubuf->head;
if (count < 0)
count += (ppp->ubuf->size + 1);
-
- put_user (count, (int *) param3);
+ PUT_USER (error, count, (int *) param3);
}
break;
/*
ppp_dev_ioctl_version (struct ppp *ppp, struct ifreq *ifr)
{
int error;
- int len;
- char *result;
-/*
- * Must have write access to the buffer.
- */
- result = (char *) ifr->ifr_ifru.ifru_data;
- len = strlen (szVersion) + 1;
- error = verify_area (VERIFY_WRITE, result, len);
+ char *result = (char *) ifr->ifr_ifru.ifru_data;
+ int len = strlen (szVersion) + 1;
/*
* Move the version data
*/
- if (error == 0)
- memcpy_tofs (result, szVersion, len);
+ COPY_TO_USER (error,
+ result,
+ szVersion,
+ len);
return error;
}
{
struct ppp_stats *result, temp;
int error;
-/*
- * Must have write access to the buffer.
- */
- result = (struct ppp_stats *) ifr->ifr_ifru.ifru_data;
- error = verify_area (VERIFY_WRITE,
- result,
- sizeof (temp));
/*
* Supply the information for the caller. First move the version data
* then move the ppp stats; and finally the vj stats.
*/
memset (&temp, 0, sizeof(temp));
- if (error == 0 && dev->flags & IFF_UP) {
+ if (dev->flags & IFF_UP) {
memcpy (&temp.p, &ppp->stats, sizeof (struct pppstat));
if (ppp->slcomp != NULL) {
temp.vj.vjs_packets = ppp->slcomp->sls_o_compressed+
}
}
- if (error == 0)
- memcpy_tofs (result, &temp, sizeof (temp));
+ result = (struct ppp_stats *) ifr->ifr_ifru.ifru_data;
+
+ COPY_TO_USER (error,
+ result,
+ &temp,
+ sizeof (temp));
+
return error;
}
{
struct ppp_comp_stats *result, temp;
int error;
-/*
- * Must have write access to the buffer.
- */
- result = (struct ppp_comp_stats *) ifr->ifr_ifru.ifru_data;
- error = verify_area (VERIFY_WRITE,
- result,
- sizeof (temp));
/*
* Supply the information for the caller.
*/
/*
* Move the data to the caller's buffer
*/
- if (error == 0)
- memcpy_tofs (result, &temp, sizeof (temp));
+ result = (struct ppp_comp_stats *) ifr->ifr_ifru.ifru_data;
+
+ COPY_TO_USER (error,
+ result,
+ &temp,
+ sizeof (temp));
+
return error;
}
*/
len = skb->len;
data = skb_data(skb);
+
+ if (data == (__u8 *) 0) {
+ if (ppp->flags & SC_DEBUG)
+ printk (KERN_CRIT "ppp_dev_xmit: %s Null skb data\n",
+ dev->name);
+ dev_kfree_skb (skb, FREE_WRITE);
+ return 0;
+ }
/*
* Look at the protocol in the skb to determine the difference between
* an IP frame and an IPX frame.
return &ppp->estats;
}
+#if LINUX_VERSION_CODE < VERSION(2,1,15)
static int ppp_dev_header (sk_buff *skb, struct device *dev,
__u16 type, void *daddr,
void *saddr, unsigned int len)
static int
ppp_dev_rebuild (void *eth, struct device *dev,
- unsigned long raddr, struct sk_buff *skb)
+ unsigned long raddr, struct sk_buff *skb)
{
return (0);
}
+#endif
/*************************************************************
* UTILITIES
/* try to find an free device */
ctl = ppp_list;
if_num = 0;
-
+
while (ctl) {
ppp = ctl2ppp (ctl);
if (!set_bit(0, &ppp->inuse))
ppp->tty = NULL;
ppp->backup_tty = NULL;
ppp->dev = dev;
-
+
dev->next = NULL;
dev->init = ppp_init_dev;
dev->name = ctl->name;
dev->priv = (void *) ppp;
sprintf (dev->name, "ppp%d", if_num);
-
+
/* link in the new channel */
ctl->next = ppp_list;
ppp_list = ctl;
if (status != 0)
printk (KERN_INFO
"PPP: ppp_init() failure %d\n", status);
+#if LINUX_VERSION_CODE < VERSION(2,1,18)
else
(void) register_symtab (&ppp_syms);
+#endif
return (status);
}
"PPP: ppp line discipline successfully unregistered\n");
/*
* De-register the devices so that there is no problem with them
- */
+ */
next_ctl = ppp_list;
while (next_ctl) {
ctl = next_ctl;
projects / ppp.git / blobdiff