*
* Michael Callahan <callahan@maths.ox.ac.uk>
* Al Longyear <longyear@netcom.com>
+ * Paul Mackerras <Paul.Mackerras@cs.anu.edu.au>
*
* Dynamic PPP devices by Jim Freeman <jfree@caldera.com>.
* ppp_tty_receive ``noisy-raise-bug'' fixed by Ove Ewerlid <ewerlid@syscon.uu.se>
*
- * ==FILEVERSION 970626==
+ * ==FILEVERSION 971205==
*
* NOTE TO MAINTAINERS:
* If you modify this file at all, please set the number above to the
#define CHECK_CHARACTERS 1
#define PPP_COMPRESS 1
-#ifndef PPP_MAX_DEV
-#define PPP_MAX_DEV 256
-#endif
-
-/* $Id: ppp.c,v 1.13 1997/07/14 03:50:50 paulus Exp $
- * Added dynamic allocation of channels to eliminate
- * compiled-in limits on the number of channels.
- *
- * Dynamic channel allocation code Copyright 1995 Caldera, Inc.,
- * released under the GNU General Public License Version 2.
- */
+/* $Id: ppp.c,v 1.15 1998/02/04 01:38:11 paulus Exp $ */
#include <linux/version.h>
#include <linux/module.h>
#include <linux/if_ether.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
+
+#if LINUX_VERSION_CODE >= VERSION(2,1,68)
+#include <linux/rtnetlink.h>
+#endif
+
#include <linux/inet.h>
#include <linux/ioctl.h>
#include <linux/if_pppvar.h>
#include <linux/ppp-comp.h>
+#ifdef CONFIG_KERNELD
+#include <linux/kerneld.h>
+#endif
+
#ifndef PPP_IPX
#define PPP_IPX 0x2b /* IPX protocol over PPP */
#endif
#define test_and_set_bit(nr, addr) set_bit(nr, addr)
#endif
+#if LINUX_VERSION_CODE < VERSION(2,1,57)
+#define signal_pending(p) ((p)->signal & ~(p)->blocked)
+#endif
+
+#if LINUX_VERSION_CODE < VERSION(2,1,25)
+#define net_device_stats enet_statistics
+#endif
+
+#if LINUX_VERSION_CODE < VERSION(2,1,60)
+typedef int rw_ret_t;
+typedef unsigned int rw_count_t;
+#else
+typedef ssize_t rw_ret_t;
+typedef size_t rw_count_t;
+#endif
+
static int ppp_register_compressor (struct compressor *cp);
static void ppp_unregister_compressor (struct compressor *cp);
register __u8 chr);
extern inline int lock_buffer (register struct ppp_buffer *buf);
static int ppp_dev_xmit_ip (struct ppp *ppp, struct ppp_buffer *buf,
- __u8 *data, int len);
+ __u8 *data, int len, enum NPmode npmode);
static int rcv_proto_ip (struct ppp *, __u16, __u8 *, int);
static int rcv_proto_ipx (struct ppp *, __u16, __u8 *, int);
#define OPTIMIZE_FLAG_TIME 0
#endif
-#ifndef PPP_MAX_DEV
-#define PPP_MAX_DEV 256
-#endif
-
/*
* Parameters which may be changed via insmod.
*/
static int flag_time = OPTIMIZE_FLAG_TIME;
-static int max_dev = PPP_MAX_DEV;
#if LINUX_VERSION_CODE >= VERSION(2,1,19)
MODULE_PARM(flag_time, "i");
-MODULE_PARM(max_dev, "i");
#endif
/*
static int ppp_dev_ioctl (struct device *dev, struct ifreq *ifr, int cmd);
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 *);
+static struct net_device_stats *ppp_dev_stats (struct device *);
#if LINUX_VERSION_CODE < VERSION(2,1,15)
static int ppp_dev_header (sk_buff *, struct device *, __u16,
* TTY callbacks
*/
-static int ppp_tty_read (struct tty_struct *, struct file *, __u8 *,
- unsigned int);
-static int ppp_tty_write (struct tty_struct *, struct file *, const __u8 *,
- unsigned int);
+static rw_ret_t ppp_tty_read(struct tty_struct *, struct file *, __u8 *,
+ rw_count_t);
+static rw_ret_t ppp_tty_write(struct tty_struct *, struct file *, const __u8 *,
+ rw_count_t);
static int ppp_tty_ioctl (struct tty_struct *, struct file *, unsigned int,
unsigned long);
#if LINUX_VERSION_CODE < VERSION(2,1,23)
*/
(void) memset (&ppp_ldisc, 0, sizeof (ppp_ldisc));
ppp_ldisc.magic = TTY_LDISC_MAGIC;
+#if LINUX_VERSION_CODE >= VERSION(2,1,28)
+ ppp_ldisc.name = "ppp";
+#endif
ppp_ldisc.open = ppp_tty_open;
ppp_ldisc.close = ppp_tty_close;
ppp_ldisc.read = ppp_tty_read;
dev->rebuild_header = ppp_dev_rebuild;
#endif
- dev->hard_header_len = PPP_HARD_HDR_LEN;
+ dev->hard_header_len = PPP_HDRLEN;
/* device INFO */
dev->mtu = PPP_MTU;
/* New-style flags */
dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
+#if LINUX_VERSION_CODE < VERSION(2,1,67)
dev->family = AF_INET;
dev->pa_addr = 0;
dev->pa_brdaddr = 0;
dev->pa_mask = 0;
dev->pa_alen = 4; /* sizeof (__u32) */
+#endif
return 0;
}
ppp->read_wait = NULL;
ppp->write_wait = NULL;
ppp->last_xmit = jiffies - flag_time;
+ ppp->last_recv = jiffies;
/* clear statistics */
memset(&ppp->stats, 0, sizeof (struct pppstat));
- memset(&ppp->estats, 0, sizeof(struct enet_statistics));
-
- /* Reset the demand dial information */
- ppp->ddinfo.xmit_idle= /* time since last NP packet sent */
- ppp->ddinfo.recv_idle=jiffies; /* time since last NP packet received */
+ memset(&ppp->estats, 0, sizeof(ppp->estats));
/* PPP compression data */
ppp->sc_xc_state =
extern inline int
lock_buffer (register struct ppp_buffer *buf)
{
- register int state;
+ unsigned long state;
unsigned long flags;
/*
* Save the current state and if free then set it to the "busy" state
dev = ppp2dev (ppp);
if (ppp->flags & SC_DEBUG)
- printk(KERN_DEBUG "ppp%s released\n", ppp->name);
+ printk(KERN_DEBUG "%s released\n", ppp->name);
ppp_ccp_closed (ppp);
if (tty != NULL && tty->disc_data == ppp)
tty->disc_data = NULL; /* Break the tty->ppp link */
+#if LINUX_VERSION_CODE >= VERSION(2,1,68)
+ rtnl_lock();
+#endif
+ /* Strong layering violation. */
if (dev && dev->flags & IFF_UP) {
- dev->flags &= ~IFF_UP; /* prevent recursion */
dev_close (dev); /* close the device properly */
}
+#if LINUX_VERSION_CODE >= VERSION(2,1,68)
+ rtnl_unlock();
+#endif
ppp_free_buf (ppp->rbuf);
ppp_free_buf (ppp->wbuf);
* transmission block.
*/
ppp2dev (ppp)->tbusy = 0;
- if (ppp2dev (ppp) -> flags & IFF_UP) {
- mark_bh (NET_BH);
- }
+ mark_bh (NET_BH);
/*
* Wake up the transmission queue for all completion events.
*/
*/
if (ppp->flags & SC_LOG_RAWIN)
ppp_print_buffer ("receive buffer", data, count);
+
/*
* Collect the character and error condition for the character. Set the toss
* flag for the first character error.
}
++flags;
}
+
/*
* Set the flags for d7 being 0/1 and parity being even/odd so that
* the normal processing would have all flags set at the end of the
CHECK_PPP(0);
CHECK_BUF_MAGIC(ppp->rbuf);
+
/*
* If there is a pending error from the receiver then log it and discard
* the damaged frame.
skb->free = 1;
#endif
- ppp->ddinfo.recv_idle = jiffies;
+ ppp->last_recv = jiffies;
netif_rx (skb);
return 1;
}
waiting if necessary
*/
-static int
+static rw_ret_t
ppp_tty_read (struct tty_struct *tty, struct file *file, __u8 * buf,
- unsigned int nr)
+ rw_count_t nr)
{
struct ppp *ppp = tty2ppp (tty);
__u8 c;
- int len, ret;
+ rw_ret_t len, ret;
int error;
#define GETC(c) \
if (!ppp)
return -EIO;
- if (ppp->magic != PPP_MAGIC)
- return -EIO;
+ /* if (ppp->magic != PPP_MAGIC)
+ return -EIO; */
CHECK_PPP (-ENXIO);
current->state = TASK_INTERRUPTIBLE;
schedule ();
- if (current->signal & ~current->blocked)
+ if (signal_pending(current))
return -EINTR;
continue;
}
"ppp_tty_read: sleeping(read_wait)\n");
#endif
interruptible_sleep_on (&ppp->read_wait);
- if (current->signal & ~current->blocked)
+ if (signal_pending(current))
return -EINTR;
}
if (ppp->flags & SC_DEBUG)
printk (KERN_DEBUG
- "ppp: read of %u bytes too small for %d "
- "frame\n", nr, len + 2);
+ "ppp: read of %lu bytes too small for %ld "
+ "frame\n", (unsigned long) nr, (long) len + 2);
ppp->stats.ppp_ierrors++;
error = -EOVERFLOW;
goto out;
}
clear_bit (0, &ppp->ubuf->locked);
-#if 0
- if (ppp->flags & SC_DEBUG)
- printk (KERN_DEBUG "ppp_tty_read: passing %d bytes up\n", ret);
-#endif
return ret;
out:
if (non_ip || flag_time == 0)
ins_char (buf, PPP_FLAG);
else {
- if (jiffies - ppp->last_xmit > flag_time)
+ if (jiffies - ppp->last_xmit >= flag_time)
ins_char (buf, PPP_FLAG);
}
ppp->last_xmit = jiffies;
* we have to put the FCS field on ourselves
*/
-static int
+static rw_ret_t
ppp_tty_write (struct tty_struct *tty, struct file *file, const __u8 * data,
- unsigned int count)
+ rw_count_t count)
{
struct ppp *ppp = tty2ppp (tty);
__u8 *new_data;
- int proto;
+ int error;
/*
* Verify the pointers.
if (ppp->flags & SC_DEBUG)
printk (KERN_WARNING
"ppp_tty_write: truncating user packet "
- "from %u to mtu %d\n", count,
+ "from %lu to mtu %d\n", (unsigned long) count,
PPP_MTU + PPP_HDRLEN);
count = PPP_MTU + PPP_HDRLEN;
}
/*
* Retrieve the user's buffer
*/
- if (copy_from_user (new_data, data, count)) {
+ COPY_FROM_USER (error, new_data, data, count);
+ if (error) {
kfree (new_data);
- return -EFAULT;
+ return error;
}
/*
* lock this PPP unit so we will be the only writer;
return 0;
}
- if (current->signal & ~current->blocked) {
+ if (signal_pending(current)) {
kfree (new_data);
return -EINTR;
}
/*
* Send the data
*/
- if (proto == PPP_IP) {
+ if (PPP_PROTOCOL(new_data) == PPP_IP) {
/*
* IP frames can be sent by pppd when we're doing
* demand-dialling. We send them via ppp_dev_xmit_ip
* to make sure that VJ compression happens properly.
*/
ppp_dev_xmit_ip(ppp, ppp->tbuf, new_data + PPP_HDRLEN,
- count - PPP_HDRLEN);
+ count - PPP_HDRLEN, NPMODE_PASS);
} else {
ppp_dev_xmit_frame (ppp, ppp->tbuf, new_data, count);
}
kfree (new_data);
- return (int) count;
+ return (rw_ret_t) count;
}
/*
/*
* Fetch the compression parameters
*/
- COPY_FROM_USER (error,
- &data,
- odp,
- sizeof (data));
+ COPY_FROM_USER (error, &data, odp, sizeof (data));
if (error != 0)
return error;
if ((__u32) nb >= (__u32)CCP_MAX_OPTION_LENGTH)
nb = CCP_MAX_OPTION_LENGTH;
- COPY_FROM_USER (error,
- ccp_option,
- ptr,
- nb);
+ COPY_FROM_USER (error, ccp_option, ptr, nb);
if (error != 0)
return error;
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 != (struct compressor *) 0) {
/*
* Found a handler for the protocol - try to allocate
case PPPIOCGIDLE:
{
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;
- COPY_TO_USER (error,
- (void *) param3,
- &cur_ddinfo,
+ 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,
+ COPY_TO_USER (error, (void *) param3, ppp->xmit_async_map,
sizeof (ppp->xmit_async_map));
break;
/*
{
__u32 temp_tbl[8];
- COPY_FROM_USER (error,
- temp_tbl,
- (void *) param3,
+ 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;
{
struct npioctl npi;
- COPY_FROM_USER (error,
- &npi,
- (void *) param3,
+ COPY_FROM_USER (error, &npi, (void *) param3,
sizeof (npi));
if (error != 0)
break;
if (param2 == PPPIOCGNPMODE) {
npi.mode = ppp->sc_npmode[npi.protocol];
- COPY_TO_USER (error,
- (void *) param3,
- &npi,
+ COPY_TO_USER (error, (void *) param3, &npi,
sizeof (npi));
break;
}
if (ppp->flags & SC_DEBUG)
printk(KERN_DEBUG "ppp: set np %d to %d\n",
npi.protocol, npi.mode);
+ ppp2dev(ppp)->tbusy = 0;
+ mark_bh(NET_BH);
}
break;
/*
poll_wait(&ppp->write_wait, wait);
/* Must lock the user buffer area while checking. */
+ CHECK_BUF_MAGIC(ppp->ubuf);
if(test_and_set_bit(0, &ppp->ubuf->locked) == 0) {
if(ppp->ubuf->head != ppp->ubuf->tail)
mask |= POLLIN | POLLRDNORM;
{
struct ppp *ppp = dev2ppp (dev);
- /* reset POINTOPOINT every time, since dev_close zaps it! */
- dev->flags |= IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
-
if (ppp2tty (ppp) == NULL) {
if (ppp->flags & SC_DEBUG)
printk (KERN_ERR
/*
* Move the version data
*/
- COPY_TO_USER (error,
- result,
- szVersion,
- len);
+ COPY_TO_USER (error, result, szVersion, len);
return error;
}
result = (struct ppp_stats *) ifr->ifr_ifru.ifru_data;
- COPY_TO_USER (error,
- result,
- &temp,
- sizeof (temp));
+ COPY_TO_USER (error, result, &temp, sizeof (temp));
return error;
}
*/
result = (struct ppp_comp_stats *) ifr->ifr_ifru.ifru_data;
- COPY_TO_USER (error,
- result,
- &temp,
- sizeof (temp));
+ COPY_TO_USER (error, result, &temp, sizeof (temp));
return error;
}
static int
ppp_dev_xmit_ip (struct ppp *ppp, struct ppp_buffer *buf,
- __u8 *data, int len)
+ __u8 *data, int len, enum NPmode npmode)
{
int proto = PPP_IP;
__u8 *hdr;
/*
* Branch on the type of processing for the IP frame.
*/
- switch (ppp->sc_npmode[NP_IP]) {
+ switch (npmode) {
case NPMODE_PASS:
break;
hdr[2] = 0;
hdr[3] = proto;
- return ppp_dev_xmit_frame (ppp, ppp->wbuf, hdr, len);
+ return ppp_dev_xmit_frame (ppp, buf, hdr, len);
}
/*
if (ppp->tbuf->locked || lock_buffer (ppp->wbuf) != 0) {
dev->tbusy = 1;
if (ppp->flags & SC_DEBUG)
- printk(KERN_DEBUG "dev_xmit blocked, t=%d w=%d\n",
+ printk(KERN_DEBUG "dev_xmit blocked, t=%lu w=%lu\n",
ppp->tbuf->locked, ppp->wbuf->locked);
return 1;
}
break;
case ETH_P_IP:
- answer = ppp_dev_xmit_ip (ppp, ppp->wbuf, data, len);
+ answer = ppp_dev_xmit_ip (ppp, ppp->wbuf, data, len,
+ ppp->sc_npmode[NP_IP]);
break;
default: /* All others have no support at this time. */
if (answer == 0) {
/* packet queued OK */
dev_kfree_skb (skb, FREE_WRITE);
- ppp->ddinfo.xmit_idle = jiffies;
} else {
ppp->wbuf->locked = 0;
if (answer < 0) {
* Generate the statistic information for the /proc/net/dev listing.
*/
-static struct enet_statistics *
+static struct net_device_stats *
ppp_dev_stats (struct device *dev)
{
struct ppp *ppp = dev2ppp (dev);
- ppp->estats.rx_packets = ppp->stats.ppp_ipackets;
- ppp->estats.rx_errors = ppp->stats.ppp_ierrors;
- ppp->estats.tx_packets = ppp->stats.ppp_opackets;
- ppp->estats.tx_errors = ppp->stats.ppp_oerrors;
+ ppp->estats.rx_packets = ppp->stats.ppp_ipackets;
+ ppp->estats.rx_errors = ppp->stats.ppp_ierrors;
+ ppp->estats.tx_packets = ppp->stats.ppp_opackets;
+ ppp->estats.tx_errors = ppp->stats.ppp_oerrors;
+#if LINUX_VERSION_CODE >= VERSION(2,1,25)
+ ppp->estats.rx_bytes = ppp->stats.ppp_ibytes;
+ ppp->estats.tx_bytes = ppp->stats.ppp_obytes;
+#endif
return &ppp->estats;
}
/* try to find an free device */
if_num = 0;
for (ppp = ppp_list; ppp != 0; ppp = ppp->next) {
- if (!set_bit(0, &ppp->inuse))
+ if (!test_and_set_bit(0, &ppp->inuse))
return ppp;
++if_num;
}