mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 16:29:59 +00:00
![Gustavo A. R. Silva](/assets/img/avatar_default.png)
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. This patch fixes the following warnings: drivers/isdn/i4l/isdn_common.c: In function ‘isdn_wildmat’: drivers/isdn/i4l/isdn_common.c:173:5: warning: this statement may fall through [-Wimplicit-fallthrough=] p++; ~^~ drivers/isdn/i4l/isdn_common.c:174:3: note: here default: ^~~~~~~ CC [M] drivers/leds/leds-lp8788.o CC [M] drivers/gpu/drm/amd/amdgpu/../powerplay/smumgr/smu10_smumgr.o drivers/isdn/i4l/isdn_common.c: In function ‘isdn_status_callback’: drivers/isdn/i4l/isdn_common.c:729:6: warning: this statement may fall through [-Wimplicit-fallthrough=] if (divert_if) ^ drivers/isdn/i4l/isdn_common.c:732:2: note: here default: ^~~~~~~ Warning level 3 was used: -Wimplicit-fallthrough=3 Notice that, in this particular case, the code comment is modified in accordance with what GCC is expecting to find. This patch is part of the ongoing efforts to enable -Wimplicit-fallthrough. Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2368 lines
56 KiB
C
2368 lines
56 KiB
C
/* $Id: isdn_common.c,v 1.1.2.3 2004/02/10 01:07:13 keil Exp $
|
|
*
|
|
* Linux ISDN subsystem, common used functions (linklevel).
|
|
*
|
|
* Copyright 1994-1999 by Fritz Elfert (fritz@isdn4linux.de)
|
|
* Copyright 1995,96 Thinking Objects Software GmbH Wuerzburg
|
|
* Copyright 1995,96 by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
|
|
*
|
|
* This software may be used and distributed according to the terms
|
|
* of the GNU General Public License, incorporated herein by reference.
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/poll.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/isdn.h>
|
|
#include <linux/mutex.h>
|
|
#include "isdn_common.h"
|
|
#include "isdn_tty.h"
|
|
#include "isdn_net.h"
|
|
#include "isdn_ppp.h"
|
|
#ifdef CONFIG_ISDN_AUDIO
|
|
#include "isdn_audio.h"
|
|
#endif
|
|
#ifdef CONFIG_ISDN_DIVERSION_MODULE
|
|
#define CONFIG_ISDN_DIVERSION
|
|
#endif
|
|
#ifdef CONFIG_ISDN_DIVERSION
|
|
#include <linux/isdn_divertif.h>
|
|
#endif /* CONFIG_ISDN_DIVERSION */
|
|
#include "isdn_v110.h"
|
|
|
|
/* Debugflags */
|
|
#undef ISDN_DEBUG_STATCALLB
|
|
|
|
MODULE_DESCRIPTION("ISDN4Linux: link layer");
|
|
MODULE_AUTHOR("Fritz Elfert");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
isdn_dev *dev;
|
|
|
|
static DEFINE_MUTEX(isdn_mutex);
|
|
static char *isdn_revision = "$Revision: 1.1.2.3 $";
|
|
|
|
extern char *isdn_net_revision;
|
|
#ifdef CONFIG_ISDN_PPP
|
|
extern char *isdn_ppp_revision;
|
|
#else
|
|
static char *isdn_ppp_revision = ": none $";
|
|
#endif
|
|
#ifdef CONFIG_ISDN_AUDIO
|
|
extern char *isdn_audio_revision;
|
|
#else
|
|
static char *isdn_audio_revision = ": none $";
|
|
#endif
|
|
extern char *isdn_v110_revision;
|
|
|
|
#ifdef CONFIG_ISDN_DIVERSION
|
|
static isdn_divert_if *divert_if; /* = NULL */
|
|
#endif /* CONFIG_ISDN_DIVERSION */
|
|
|
|
|
|
static int isdn_writebuf_stub(int, int, const u_char __user *, int);
|
|
static void set_global_features(void);
|
|
static int isdn_wildmat(char *s, char *p);
|
|
static int isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding);
|
|
|
|
static inline void
|
|
isdn_lock_driver(isdn_driver_t *drv)
|
|
{
|
|
try_module_get(drv->interface->owner);
|
|
drv->locks++;
|
|
}
|
|
|
|
void
|
|
isdn_lock_drivers(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
|
|
if (!dev->drv[i])
|
|
continue;
|
|
isdn_lock_driver(dev->drv[i]);
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
isdn_unlock_driver(isdn_driver_t *drv)
|
|
{
|
|
if (drv->locks > 0) {
|
|
drv->locks--;
|
|
module_put(drv->interface->owner);
|
|
}
|
|
}
|
|
|
|
void
|
|
isdn_unlock_drivers(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
|
|
if (!dev->drv[i])
|
|
continue;
|
|
isdn_unlock_driver(dev->drv[i]);
|
|
}
|
|
}
|
|
|
|
#if defined(ISDN_DEBUG_NET_DUMP) || defined(ISDN_DEBUG_MODEM_DUMP)
|
|
void
|
|
isdn_dumppkt(char *s, u_char *p, int len, int dumplen)
|
|
{
|
|
int dumpc;
|
|
|
|
printk(KERN_DEBUG "%s(%d) ", s, len);
|
|
for (dumpc = 0; (dumpc < dumplen) && (len); len--, dumpc++)
|
|
printk(" %02x", *p++);
|
|
printk("\n");
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* I picked the pattern-matching-functions from an old GNU-tar version (1.10)
|
|
* It was originally written and put to PD by rs@mirror.TMC.COM (Rich Salz)
|
|
*/
|
|
static int
|
|
isdn_star(char *s, char *p)
|
|
{
|
|
while (isdn_wildmat(s, p)) {
|
|
if (*++s == '\0')
|
|
return (2);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Shell-type Pattern-matching for incoming caller-Ids
|
|
* This function gets a string in s and checks, if it matches the pattern
|
|
* given in p.
|
|
*
|
|
* Return:
|
|
* 0 = match.
|
|
* 1 = no match.
|
|
* 2 = no match. Would eventually match, if s would be longer.
|
|
*
|
|
* Possible Patterns:
|
|
*
|
|
* '?' matches one character
|
|
* '*' matches zero or more characters
|
|
* [xyz] matches the set of characters in brackets.
|
|
* [^xyz] matches any single character not in the set of characters
|
|
*/
|
|
|
|
static int
|
|
isdn_wildmat(char *s, char *p)
|
|
{
|
|
register int last;
|
|
register int matched;
|
|
register int reverse;
|
|
register int nostar = 1;
|
|
|
|
if (!(*s) && !(*p))
|
|
return (1);
|
|
for (; *p; s++, p++)
|
|
switch (*p) {
|
|
case '\\':
|
|
/* Literal match with following character. */
|
|
p++;
|
|
/* fall through */
|
|
default:
|
|
if (*s != *p)
|
|
return (*s == '\0') ? 2 : 1;
|
|
continue;
|
|
case '?':
|
|
/* Match anything. */
|
|
if (*s == '\0')
|
|
return (2);
|
|
continue;
|
|
case '*':
|
|
nostar = 0;
|
|
/* Trailing star matches everything. */
|
|
return (*++p ? isdn_star(s, p) : 0);
|
|
case '[':
|
|
/* [^....] means inverse character class. */
|
|
if ((reverse = (p[1] == '^')))
|
|
p++;
|
|
for (last = 0, matched = 0; *++p && (*p != ']'); last = *p)
|
|
/* This next line requires a good C compiler. */
|
|
if (*p == '-' ? *s <= *++p && *s >= last : *s == *p)
|
|
matched = 1;
|
|
if (matched == reverse)
|
|
return (1);
|
|
continue;
|
|
}
|
|
return (*s == '\0') ? 0 : nostar;
|
|
}
|
|
|
|
int isdn_msncmp(const char *msn1, const char *msn2)
|
|
{
|
|
char TmpMsn1[ISDN_MSNLEN];
|
|
char TmpMsn2[ISDN_MSNLEN];
|
|
char *p;
|
|
|
|
for (p = TmpMsn1; *msn1 && *msn1 != ':';) // Strip off a SPID
|
|
*p++ = *msn1++;
|
|
*p = '\0';
|
|
|
|
for (p = TmpMsn2; *msn2 && *msn2 != ':';) // Strip off a SPID
|
|
*p++ = *msn2++;
|
|
*p = '\0';
|
|
|
|
return isdn_wildmat(TmpMsn1, TmpMsn2);
|
|
}
|
|
|
|
int
|
|
isdn_dc2minor(int di, int ch)
|
|
{
|
|
int i;
|
|
for (i = 0; i < ISDN_MAX_CHANNELS; i++)
|
|
if (dev->chanmap[i] == ch && dev->drvmap[i] == di)
|
|
return i;
|
|
return -1;
|
|
}
|
|
|
|
static int isdn_timer_cnt1 = 0;
|
|
static int isdn_timer_cnt2 = 0;
|
|
static int isdn_timer_cnt3 = 0;
|
|
|
|
static void
|
|
isdn_timer_funct(struct timer_list *unused)
|
|
{
|
|
int tf = dev->tflags;
|
|
if (tf & ISDN_TIMER_FAST) {
|
|
if (tf & ISDN_TIMER_MODEMREAD)
|
|
isdn_tty_readmodem();
|
|
if (tf & ISDN_TIMER_MODEMPLUS)
|
|
isdn_tty_modem_escape();
|
|
if (tf & ISDN_TIMER_MODEMXMIT)
|
|
isdn_tty_modem_xmit();
|
|
}
|
|
if (tf & ISDN_TIMER_SLOW) {
|
|
if (++isdn_timer_cnt1 >= ISDN_TIMER_02SEC) {
|
|
isdn_timer_cnt1 = 0;
|
|
if (tf & ISDN_TIMER_NETDIAL)
|
|
isdn_net_dial();
|
|
}
|
|
if (++isdn_timer_cnt2 >= ISDN_TIMER_1SEC) {
|
|
isdn_timer_cnt2 = 0;
|
|
if (tf & ISDN_TIMER_NETHANGUP)
|
|
isdn_net_autohup();
|
|
if (++isdn_timer_cnt3 >= ISDN_TIMER_RINGING) {
|
|
isdn_timer_cnt3 = 0;
|
|
if (tf & ISDN_TIMER_MODEMRING)
|
|
isdn_tty_modem_ring();
|
|
}
|
|
if (tf & ISDN_TIMER_CARRIER)
|
|
isdn_tty_carrier_timeout();
|
|
}
|
|
}
|
|
if (tf)
|
|
mod_timer(&dev->timer, jiffies + ISDN_TIMER_RES);
|
|
}
|
|
|
|
void
|
|
isdn_timer_ctrl(int tf, int onoff)
|
|
{
|
|
unsigned long flags;
|
|
int old_tflags;
|
|
|
|
spin_lock_irqsave(&dev->timerlock, flags);
|
|
if ((tf & ISDN_TIMER_SLOW) && (!(dev->tflags & ISDN_TIMER_SLOW))) {
|
|
/* If the slow-timer wasn't activated until now */
|
|
isdn_timer_cnt1 = 0;
|
|
isdn_timer_cnt2 = 0;
|
|
}
|
|
old_tflags = dev->tflags;
|
|
if (onoff)
|
|
dev->tflags |= tf;
|
|
else
|
|
dev->tflags &= ~tf;
|
|
if (dev->tflags && !old_tflags)
|
|
mod_timer(&dev->timer, jiffies + ISDN_TIMER_RES);
|
|
spin_unlock_irqrestore(&dev->timerlock, flags);
|
|
}
|
|
|
|
/*
|
|
* Receive a packet from B-Channel. (Called from low-level-module)
|
|
*/
|
|
static void
|
|
isdn_receive_skb_callback(int di, int channel, struct sk_buff *skb)
|
|
{
|
|
int i;
|
|
|
|
if ((i = isdn_dc2minor(di, channel)) == -1) {
|
|
dev_kfree_skb(skb);
|
|
return;
|
|
}
|
|
/* Update statistics */
|
|
dev->ibytes[i] += skb->len;
|
|
|
|
/* First, try to deliver data to network-device */
|
|
if (isdn_net_rcv_skb(i, skb))
|
|
return;
|
|
|
|
/* V.110 handling
|
|
* makes sense for async streams only, so it is
|
|
* called after possible net-device delivery.
|
|
*/
|
|
if (dev->v110[i]) {
|
|
atomic_inc(&dev->v110use[i]);
|
|
skb = isdn_v110_decode(dev->v110[i], skb);
|
|
atomic_dec(&dev->v110use[i]);
|
|
if (!skb)
|
|
return;
|
|
}
|
|
|
|
/* No network-device found, deliver to tty or raw-channel */
|
|
if (skb->len) {
|
|
if (isdn_tty_rcv_skb(i, di, channel, skb))
|
|
return;
|
|
wake_up_interruptible(&dev->drv[di]->rcv_waitq[channel]);
|
|
} else
|
|
dev_kfree_skb(skb);
|
|
}
|
|
|
|
/*
|
|
* Intercept command from Linklevel to Lowlevel.
|
|
* If layer 2 protocol is V.110 and this is not supported by current
|
|
* lowlevel-driver, use driver's transparent mode and handle V.110 in
|
|
* linklevel instead.
|
|
*/
|
|
int
|
|
isdn_command(isdn_ctrl *cmd)
|
|
{
|
|
if (cmd->driver == -1) {
|
|
printk(KERN_WARNING "isdn_command command(%x) driver -1\n", cmd->command);
|
|
return (1);
|
|
}
|
|
if (!dev->drv[cmd->driver]) {
|
|
printk(KERN_WARNING "isdn_command command(%x) dev->drv[%d] NULL\n",
|
|
cmd->command, cmd->driver);
|
|
return (1);
|
|
}
|
|
if (!dev->drv[cmd->driver]->interface) {
|
|
printk(KERN_WARNING "isdn_command command(%x) dev->drv[%d]->interface NULL\n",
|
|
cmd->command, cmd->driver);
|
|
return (1);
|
|
}
|
|
if (cmd->command == ISDN_CMD_SETL2) {
|
|
int idx = isdn_dc2minor(cmd->driver, cmd->arg & 255);
|
|
unsigned long l2prot = (cmd->arg >> 8) & 255;
|
|
unsigned long features = (dev->drv[cmd->driver]->interface->features
|
|
>> ISDN_FEATURE_L2_SHIFT) &
|
|
ISDN_FEATURE_L2_MASK;
|
|
unsigned long l2_feature = (1 << l2prot);
|
|
|
|
switch (l2prot) {
|
|
case ISDN_PROTO_L2_V11096:
|
|
case ISDN_PROTO_L2_V11019:
|
|
case ISDN_PROTO_L2_V11038:
|
|
/* If V.110 requested, but not supported by
|
|
* HL-driver, set emulator-flag and change
|
|
* Layer-2 to transparent
|
|
*/
|
|
if (!(features & l2_feature)) {
|
|
dev->v110emu[idx] = l2prot;
|
|
cmd->arg = (cmd->arg & 255) |
|
|
(ISDN_PROTO_L2_TRANS << 8);
|
|
} else
|
|
dev->v110emu[idx] = 0;
|
|
}
|
|
}
|
|
return dev->drv[cmd->driver]->interface->command(cmd);
|
|
}
|
|
|
|
void
|
|
isdn_all_eaz(int di, int ch)
|
|
{
|
|
isdn_ctrl cmd;
|
|
|
|
if (di < 0)
|
|
return;
|
|
cmd.driver = di;
|
|
cmd.arg = ch;
|
|
cmd.command = ISDN_CMD_SETEAZ;
|
|
cmd.parm.num[0] = '\0';
|
|
isdn_command(&cmd);
|
|
}
|
|
|
|
/*
|
|
* Begin of a CAPI like LL<->HL interface, currently used only for
|
|
* supplementary service (CAPI 2.0 part III)
|
|
*/
|
|
#include <linux/isdn/capicmd.h>
|
|
|
|
static int
|
|
isdn_capi_rec_hl_msg(capi_msg *cm)
|
|
{
|
|
switch (cm->Command) {
|
|
case CAPI_FACILITY:
|
|
/* in the moment only handled in tty */
|
|
return (isdn_tty_capi_facility(cm));
|
|
default:
|
|
return (-1);
|
|
}
|
|
}
|
|
|
|
static int
|
|
isdn_status_callback(isdn_ctrl *c)
|
|
{
|
|
int di;
|
|
u_long flags;
|
|
int i;
|
|
int r;
|
|
int retval = 0;
|
|
isdn_ctrl cmd;
|
|
isdn_net_dev *p;
|
|
|
|
di = c->driver;
|
|
i = isdn_dc2minor(di, c->arg);
|
|
switch (c->command) {
|
|
case ISDN_STAT_BSENT:
|
|
if (i < 0)
|
|
return -1;
|
|
if (dev->global_flags & ISDN_GLOBAL_STOPPED)
|
|
return 0;
|
|
if (isdn_net_stat_callback(i, c))
|
|
return 0;
|
|
if (isdn_v110_stat_callback(i, c))
|
|
return 0;
|
|
if (isdn_tty_stat_callback(i, c))
|
|
return 0;
|
|
wake_up_interruptible(&dev->drv[di]->snd_waitq[c->arg]);
|
|
break;
|
|
case ISDN_STAT_STAVAIL:
|
|
dev->drv[di]->stavail += c->arg;
|
|
wake_up_interruptible(&dev->drv[di]->st_waitq);
|
|
break;
|
|
case ISDN_STAT_RUN:
|
|
dev->drv[di]->flags |= DRV_FLAG_RUNNING;
|
|
for (i = 0; i < ISDN_MAX_CHANNELS; i++)
|
|
if (dev->drvmap[i] == di)
|
|
isdn_all_eaz(di, dev->chanmap[i]);
|
|
set_global_features();
|
|
break;
|
|
case ISDN_STAT_STOP:
|
|
dev->drv[di]->flags &= ~DRV_FLAG_RUNNING;
|
|
break;
|
|
case ISDN_STAT_ICALL:
|
|
if (i < 0)
|
|
return -1;
|
|
#ifdef ISDN_DEBUG_STATCALLB
|
|
printk(KERN_DEBUG "ICALL (net): %d %ld %s\n", di, c->arg, c->parm.num);
|
|
#endif
|
|
if (dev->global_flags & ISDN_GLOBAL_STOPPED) {
|
|
cmd.driver = di;
|
|
cmd.arg = c->arg;
|
|
cmd.command = ISDN_CMD_HANGUP;
|
|
isdn_command(&cmd);
|
|
return 0;
|
|
}
|
|
/* Try to find a network-interface which will accept incoming call */
|
|
r = ((c->command == ISDN_STAT_ICALLW) ? 0 : isdn_net_find_icall(di, c->arg, i, &c->parm.setup));
|
|
switch (r) {
|
|
case 0:
|
|
/* No network-device replies.
|
|
* Try ttyI's.
|
|
* These return 0 on no match, 1 on match and
|
|
* 3 on eventually match, if CID is longer.
|
|
*/
|
|
if (c->command == ISDN_STAT_ICALL)
|
|
if ((retval = isdn_tty_find_icall(di, c->arg, &c->parm.setup))) return (retval);
|
|
#ifdef CONFIG_ISDN_DIVERSION
|
|
if (divert_if)
|
|
if ((retval = divert_if->stat_callback(c)))
|
|
return (retval); /* processed */
|
|
#endif /* CONFIG_ISDN_DIVERSION */
|
|
if ((!retval) && (dev->drv[di]->flags & DRV_FLAG_REJBUS)) {
|
|
/* No tty responding */
|
|
cmd.driver = di;
|
|
cmd.arg = c->arg;
|
|
cmd.command = ISDN_CMD_HANGUP;
|
|
isdn_command(&cmd);
|
|
retval = 2;
|
|
}
|
|
break;
|
|
case 1:
|
|
/* Schedule connection-setup */
|
|
isdn_net_dial();
|
|
cmd.driver = di;
|
|
cmd.arg = c->arg;
|
|
cmd.command = ISDN_CMD_ACCEPTD;
|
|
for (p = dev->netdev; p; p = p->next)
|
|
if (p->local->isdn_channel == cmd.arg)
|
|
{
|
|
strcpy(cmd.parm.setup.eazmsn, p->local->msn);
|
|
isdn_command(&cmd);
|
|
retval = 1;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case 2: /* For calling back, first reject incoming call ... */
|
|
case 3: /* Interface found, but down, reject call actively */
|
|
retval = 2;
|
|
printk(KERN_INFO "isdn: Rejecting Call\n");
|
|
cmd.driver = di;
|
|
cmd.arg = c->arg;
|
|
cmd.command = ISDN_CMD_HANGUP;
|
|
isdn_command(&cmd);
|
|
if (r == 3)
|
|
break;
|
|
/* Fall through */
|
|
case 4:
|
|
/* ... then start callback. */
|
|
isdn_net_dial();
|
|
break;
|
|
case 5:
|
|
/* Number would eventually match, if longer */
|
|
retval = 3;
|
|
break;
|
|
}
|
|
#ifdef ISDN_DEBUG_STATCALLB
|
|
printk(KERN_DEBUG "ICALL: ret=%d\n", retval);
|
|
#endif
|
|
return retval;
|
|
break;
|
|
case ISDN_STAT_CINF:
|
|
if (i < 0)
|
|
return -1;
|
|
#ifdef ISDN_DEBUG_STATCALLB
|
|
printk(KERN_DEBUG "CINF: %ld %s\n", c->arg, c->parm.num);
|
|
#endif
|
|
if (dev->global_flags & ISDN_GLOBAL_STOPPED)
|
|
return 0;
|
|
if (strcmp(c->parm.num, "0"))
|
|
isdn_net_stat_callback(i, c);
|
|
isdn_tty_stat_callback(i, c);
|
|
break;
|
|
case ISDN_STAT_CAUSE:
|
|
#ifdef ISDN_DEBUG_STATCALLB
|
|
printk(KERN_DEBUG "CAUSE: %ld %s\n", c->arg, c->parm.num);
|
|
#endif
|
|
printk(KERN_INFO "isdn: %s,ch%ld cause: %s\n",
|
|
dev->drvid[di], c->arg, c->parm.num);
|
|
isdn_tty_stat_callback(i, c);
|
|
#ifdef CONFIG_ISDN_DIVERSION
|
|
if (divert_if)
|
|
divert_if->stat_callback(c);
|
|
#endif /* CONFIG_ISDN_DIVERSION */
|
|
break;
|
|
case ISDN_STAT_DISPLAY:
|
|
#ifdef ISDN_DEBUG_STATCALLB
|
|
printk(KERN_DEBUG "DISPLAY: %ld %s\n", c->arg, c->parm.display);
|
|
#endif
|
|
isdn_tty_stat_callback(i, c);
|
|
#ifdef CONFIG_ISDN_DIVERSION
|
|
if (divert_if)
|
|
divert_if->stat_callback(c);
|
|
#endif /* CONFIG_ISDN_DIVERSION */
|
|
break;
|
|
case ISDN_STAT_DCONN:
|
|
if (i < 0)
|
|
return -1;
|
|
#ifdef ISDN_DEBUG_STATCALLB
|
|
printk(KERN_DEBUG "DCONN: %ld\n", c->arg);
|
|
#endif
|
|
if (dev->global_flags & ISDN_GLOBAL_STOPPED)
|
|
return 0;
|
|
/* Find any net-device, waiting for D-channel setup */
|
|
if (isdn_net_stat_callback(i, c))
|
|
break;
|
|
isdn_v110_stat_callback(i, c);
|
|
/* Find any ttyI, waiting for D-channel setup */
|
|
if (isdn_tty_stat_callback(i, c)) {
|
|
cmd.driver = di;
|
|
cmd.arg = c->arg;
|
|
cmd.command = ISDN_CMD_ACCEPTB;
|
|
isdn_command(&cmd);
|
|
break;
|
|
}
|
|
break;
|
|
case ISDN_STAT_DHUP:
|
|
if (i < 0)
|
|
return -1;
|
|
#ifdef ISDN_DEBUG_STATCALLB
|
|
printk(KERN_DEBUG "DHUP: %ld\n", c->arg);
|
|
#endif
|
|
if (dev->global_flags & ISDN_GLOBAL_STOPPED)
|
|
return 0;
|
|
dev->drv[di]->online &= ~(1 << (c->arg));
|
|
isdn_info_update();
|
|
/* Signal hangup to network-devices */
|
|
if (isdn_net_stat_callback(i, c))
|
|
break;
|
|
isdn_v110_stat_callback(i, c);
|
|
if (isdn_tty_stat_callback(i, c))
|
|
break;
|
|
#ifdef CONFIG_ISDN_DIVERSION
|
|
if (divert_if)
|
|
divert_if->stat_callback(c);
|
|
#endif /* CONFIG_ISDN_DIVERSION */
|
|
break;
|
|
break;
|
|
case ISDN_STAT_BCONN:
|
|
if (i < 0)
|
|
return -1;
|
|
#ifdef ISDN_DEBUG_STATCALLB
|
|
printk(KERN_DEBUG "BCONN: %ld\n", c->arg);
|
|
#endif
|
|
/* Signal B-channel-connect to network-devices */
|
|
if (dev->global_flags & ISDN_GLOBAL_STOPPED)
|
|
return 0;
|
|
dev->drv[di]->online |= (1 << (c->arg));
|
|
isdn_info_update();
|
|
if (isdn_net_stat_callback(i, c))
|
|
break;
|
|
isdn_v110_stat_callback(i, c);
|
|
if (isdn_tty_stat_callback(i, c))
|
|
break;
|
|
break;
|
|
case ISDN_STAT_BHUP:
|
|
if (i < 0)
|
|
return -1;
|
|
#ifdef ISDN_DEBUG_STATCALLB
|
|
printk(KERN_DEBUG "BHUP: %ld\n", c->arg);
|
|
#endif
|
|
if (dev->global_flags & ISDN_GLOBAL_STOPPED)
|
|
return 0;
|
|
dev->drv[di]->online &= ~(1 << (c->arg));
|
|
isdn_info_update();
|
|
#ifdef CONFIG_ISDN_X25
|
|
/* Signal hangup to network-devices */
|
|
if (isdn_net_stat_callback(i, c))
|
|
break;
|
|
#endif
|
|
isdn_v110_stat_callback(i, c);
|
|
if (isdn_tty_stat_callback(i, c))
|
|
break;
|
|
break;
|
|
case ISDN_STAT_NODCH:
|
|
if (i < 0)
|
|
return -1;
|
|
#ifdef ISDN_DEBUG_STATCALLB
|
|
printk(KERN_DEBUG "NODCH: %ld\n", c->arg);
|
|
#endif
|
|
if (dev->global_flags & ISDN_GLOBAL_STOPPED)
|
|
return 0;
|
|
if (isdn_net_stat_callback(i, c))
|
|
break;
|
|
if (isdn_tty_stat_callback(i, c))
|
|
break;
|
|
break;
|
|
case ISDN_STAT_ADDCH:
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
if (isdn_add_channels(dev->drv[di], di, c->arg, 1)) {
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
return -1;
|
|
}
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
isdn_info_update();
|
|
break;
|
|
case ISDN_STAT_DISCH:
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
for (i = 0; i < ISDN_MAX_CHANNELS; i++)
|
|
if ((dev->drvmap[i] == di) &&
|
|
(dev->chanmap[i] == c->arg)) {
|
|
if (c->parm.num[0])
|
|
dev->usage[i] &= ~ISDN_USAGE_DISABLED;
|
|
else
|
|
if (USG_NONE(dev->usage[i])) {
|
|
dev->usage[i] |= ISDN_USAGE_DISABLED;
|
|
}
|
|
else
|
|
retval = -1;
|
|
break;
|
|
}
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
isdn_info_update();
|
|
break;
|
|
case ISDN_STAT_UNLOAD:
|
|
while (dev->drv[di]->locks > 0) {
|
|
isdn_unlock_driver(dev->drv[di]);
|
|
}
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
isdn_tty_stat_callback(i, c);
|
|
for (i = 0; i < ISDN_MAX_CHANNELS; i++)
|
|
if (dev->drvmap[i] == di) {
|
|
dev->drvmap[i] = -1;
|
|
dev->chanmap[i] = -1;
|
|
dev->usage[i] &= ~ISDN_USAGE_DISABLED;
|
|
}
|
|
dev->drivers--;
|
|
dev->channels -= dev->drv[di]->channels;
|
|
kfree(dev->drv[di]->rcverr);
|
|
kfree(dev->drv[di]->rcvcount);
|
|
for (i = 0; i < dev->drv[di]->channels; i++)
|
|
skb_queue_purge(&dev->drv[di]->rpqueue[i]);
|
|
kfree(dev->drv[di]->rpqueue);
|
|
kfree(dev->drv[di]->rcv_waitq);
|
|
kfree(dev->drv[di]);
|
|
dev->drv[di] = NULL;
|
|
dev->drvid[di][0] = '\0';
|
|
isdn_info_update();
|
|
set_global_features();
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
return 0;
|
|
case ISDN_STAT_L1ERR:
|
|
break;
|
|
case CAPI_PUT_MESSAGE:
|
|
return (isdn_capi_rec_hl_msg(&c->parm.cmsg));
|
|
#ifdef CONFIG_ISDN_TTY_FAX
|
|
case ISDN_STAT_FAXIND:
|
|
isdn_tty_stat_callback(i, c);
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_ISDN_AUDIO
|
|
case ISDN_STAT_AUDIO:
|
|
isdn_tty_stat_callback(i, c);
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_ISDN_DIVERSION
|
|
case ISDN_STAT_PROT:
|
|
case ISDN_STAT_REDIR:
|
|
if (divert_if)
|
|
return (divert_if->stat_callback(c));
|
|
#endif /* CONFIG_ISDN_DIVERSION */
|
|
/* fall through */
|
|
default:
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Get integer from char-pointer, set pointer to end of number
|
|
*/
|
|
int
|
|
isdn_getnum(char **p)
|
|
{
|
|
int v = -1;
|
|
|
|
while (*p[0] >= '0' && *p[0] <= '9')
|
|
v = ((v < 0) ? 0 : (v * 10)) + (int) ((*p[0]++) - '0');
|
|
return v;
|
|
}
|
|
|
|
#define DLE 0x10
|
|
|
|
/*
|
|
* isdn_readbchan() tries to get data from the read-queue.
|
|
* It MUST be called with interrupts off.
|
|
*
|
|
* Be aware that this is not an atomic operation when sleep != 0, even though
|
|
* interrupts are turned off! Well, like that we are currently only called
|
|
* on behalf of a read system call on raw device files (which are documented
|
|
* to be dangerous and for debugging purpose only). The inode semaphore
|
|
* takes care that this is not called for the same minor device number while
|
|
* we are sleeping, but access is not serialized against simultaneous read()
|
|
* from the corresponding ttyI device. Can other ugly events, like changes
|
|
* of the mapping (di,ch)<->minor, happen during the sleep? --he
|
|
*/
|
|
int
|
|
isdn_readbchan(int di, int channel, u_char *buf, u_char *fp, int len, wait_queue_head_t *sleep)
|
|
{
|
|
int count;
|
|
int count_pull;
|
|
int count_put;
|
|
int dflag;
|
|
struct sk_buff *skb;
|
|
u_char *cp;
|
|
|
|
if (!dev->drv[di])
|
|
return 0;
|
|
if (skb_queue_empty(&dev->drv[di]->rpqueue[channel])) {
|
|
if (sleep)
|
|
wait_event_interruptible(*sleep,
|
|
!skb_queue_empty(&dev->drv[di]->rpqueue[channel]));
|
|
else
|
|
return 0;
|
|
}
|
|
if (len > dev->drv[di]->rcvcount[channel])
|
|
len = dev->drv[di]->rcvcount[channel];
|
|
cp = buf;
|
|
count = 0;
|
|
while (len) {
|
|
if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
|
|
break;
|
|
#ifdef CONFIG_ISDN_AUDIO
|
|
if (ISDN_AUDIO_SKB_LOCK(skb))
|
|
break;
|
|
ISDN_AUDIO_SKB_LOCK(skb) = 1;
|
|
if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
|
|
char *p = skb->data;
|
|
unsigned long DLEmask = (1 << channel);
|
|
|
|
dflag = 0;
|
|
count_pull = count_put = 0;
|
|
while ((count_pull < skb->len) && (len > 0)) {
|
|
len--;
|
|
if (dev->drv[di]->DLEflag & DLEmask) {
|
|
*cp++ = DLE;
|
|
dev->drv[di]->DLEflag &= ~DLEmask;
|
|
} else {
|
|
*cp++ = *p;
|
|
if (*p == DLE) {
|
|
dev->drv[di]->DLEflag |= DLEmask;
|
|
(ISDN_AUDIO_SKB_DLECOUNT(skb))--;
|
|
}
|
|
p++;
|
|
count_pull++;
|
|
}
|
|
count_put++;
|
|
}
|
|
if (count_pull >= skb->len)
|
|
dflag = 1;
|
|
} else {
|
|
#endif
|
|
/* No DLE's in buff, so simply copy it */
|
|
dflag = 1;
|
|
if ((count_pull = skb->len) > len) {
|
|
count_pull = len;
|
|
dflag = 0;
|
|
}
|
|
count_put = count_pull;
|
|
skb_copy_from_linear_data(skb, cp, count_put);
|
|
cp += count_put;
|
|
len -= count_put;
|
|
#ifdef CONFIG_ISDN_AUDIO
|
|
}
|
|
#endif
|
|
count += count_put;
|
|
if (fp) {
|
|
memset(fp, 0, count_put);
|
|
fp += count_put;
|
|
}
|
|
if (dflag) {
|
|
/* We got all the data in this buff.
|
|
* Now we can dequeue it.
|
|
*/
|
|
if (fp)
|
|
*(fp - 1) = 0xff;
|
|
#ifdef CONFIG_ISDN_AUDIO
|
|
ISDN_AUDIO_SKB_LOCK(skb) = 0;
|
|
#endif
|
|
skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
|
|
dev_kfree_skb(skb);
|
|
} else {
|
|
/* Not yet emptied this buff, so it
|
|
* must stay in the queue, for further calls
|
|
* but we pull off the data we got until now.
|
|
*/
|
|
skb_pull(skb, count_pull);
|
|
#ifdef CONFIG_ISDN_AUDIO
|
|
ISDN_AUDIO_SKB_LOCK(skb) = 0;
|
|
#endif
|
|
}
|
|
dev->drv[di]->rcvcount[channel] -= count_put;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
/*
|
|
* isdn_readbchan_tty() tries to get data from the read-queue.
|
|
* It MUST be called with interrupts off.
|
|
*
|
|
* Be aware that this is not an atomic operation when sleep != 0, even though
|
|
* interrupts are turned off! Well, like that we are currently only called
|
|
* on behalf of a read system call on raw device files (which are documented
|
|
* to be dangerous and for debugging purpose only). The inode semaphore
|
|
* takes care that this is not called for the same minor device number while
|
|
* we are sleeping, but access is not serialized against simultaneous read()
|
|
* from the corresponding ttyI device. Can other ugly events, like changes
|
|
* of the mapping (di,ch)<->minor, happen during the sleep? --he
|
|
*/
|
|
int
|
|
isdn_readbchan_tty(int di, int channel, struct tty_port *port, int cisco_hack)
|
|
{
|
|
int count;
|
|
int count_pull;
|
|
int count_put;
|
|
int dflag;
|
|
struct sk_buff *skb;
|
|
char last = 0;
|
|
int len;
|
|
|
|
if (!dev->drv[di])
|
|
return 0;
|
|
if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
|
|
return 0;
|
|
|
|
len = tty_buffer_request_room(port, dev->drv[di]->rcvcount[channel]);
|
|
if (len == 0)
|
|
return len;
|
|
|
|
count = 0;
|
|
while (len) {
|
|
if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
|
|
break;
|
|
#ifdef CONFIG_ISDN_AUDIO
|
|
if (ISDN_AUDIO_SKB_LOCK(skb))
|
|
break;
|
|
ISDN_AUDIO_SKB_LOCK(skb) = 1;
|
|
if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
|
|
char *p = skb->data;
|
|
unsigned long DLEmask = (1 << channel);
|
|
|
|
dflag = 0;
|
|
count_pull = count_put = 0;
|
|
while ((count_pull < skb->len) && (len > 0)) {
|
|
/* push every character but the last to the tty buffer directly */
|
|
if (count_put)
|
|
tty_insert_flip_char(port, last, TTY_NORMAL);
|
|
len--;
|
|
if (dev->drv[di]->DLEflag & DLEmask) {
|
|
last = DLE;
|
|
dev->drv[di]->DLEflag &= ~DLEmask;
|
|
} else {
|
|
last = *p;
|
|
if (last == DLE) {
|
|
dev->drv[di]->DLEflag |= DLEmask;
|
|
(ISDN_AUDIO_SKB_DLECOUNT(skb))--;
|
|
}
|
|
p++;
|
|
count_pull++;
|
|
}
|
|
count_put++;
|
|
}
|
|
if (count_pull >= skb->len)
|
|
dflag = 1;
|
|
} else {
|
|
#endif
|
|
/* No DLE's in buff, so simply copy it */
|
|
dflag = 1;
|
|
if ((count_pull = skb->len) > len) {
|
|
count_pull = len;
|
|
dflag = 0;
|
|
}
|
|
count_put = count_pull;
|
|
if (count_put > 1)
|
|
tty_insert_flip_string(port, skb->data, count_put - 1);
|
|
last = skb->data[count_put - 1];
|
|
len -= count_put;
|
|
#ifdef CONFIG_ISDN_AUDIO
|
|
}
|
|
#endif
|
|
count += count_put;
|
|
if (dflag) {
|
|
/* We got all the data in this buff.
|
|
* Now we can dequeue it.
|
|
*/
|
|
if (cisco_hack)
|
|
tty_insert_flip_char(port, last, 0xFF);
|
|
else
|
|
tty_insert_flip_char(port, last, TTY_NORMAL);
|
|
#ifdef CONFIG_ISDN_AUDIO
|
|
ISDN_AUDIO_SKB_LOCK(skb) = 0;
|
|
#endif
|
|
skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
|
|
dev_kfree_skb(skb);
|
|
} else {
|
|
tty_insert_flip_char(port, last, TTY_NORMAL);
|
|
/* Not yet emptied this buff, so it
|
|
* must stay in the queue, for further calls
|
|
* but we pull off the data we got until now.
|
|
*/
|
|
skb_pull(skb, count_pull);
|
|
#ifdef CONFIG_ISDN_AUDIO
|
|
ISDN_AUDIO_SKB_LOCK(skb) = 0;
|
|
#endif
|
|
}
|
|
dev->drv[di]->rcvcount[channel] -= count_put;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
|
|
static inline int
|
|
isdn_minor2drv(int minor)
|
|
{
|
|
return (dev->drvmap[minor]);
|
|
}
|
|
|
|
static inline int
|
|
isdn_minor2chan(int minor)
|
|
{
|
|
return (dev->chanmap[minor]);
|
|
}
|
|
|
|
static char *
|
|
isdn_statstr(void)
|
|
{
|
|
static char istatbuf[2048];
|
|
char *p;
|
|
int i;
|
|
|
|
sprintf(istatbuf, "idmap:\t");
|
|
p = istatbuf + strlen(istatbuf);
|
|
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
|
|
sprintf(p, "%s ", (dev->drvmap[i] < 0) ? "-" : dev->drvid[dev->drvmap[i]]);
|
|
p = istatbuf + strlen(istatbuf);
|
|
}
|
|
sprintf(p, "\nchmap:\t");
|
|
p = istatbuf + strlen(istatbuf);
|
|
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
|
|
sprintf(p, "%d ", dev->chanmap[i]);
|
|
p = istatbuf + strlen(istatbuf);
|
|
}
|
|
sprintf(p, "\ndrmap:\t");
|
|
p = istatbuf + strlen(istatbuf);
|
|
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
|
|
sprintf(p, "%d ", dev->drvmap[i]);
|
|
p = istatbuf + strlen(istatbuf);
|
|
}
|
|
sprintf(p, "\nusage:\t");
|
|
p = istatbuf + strlen(istatbuf);
|
|
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
|
|
sprintf(p, "%d ", dev->usage[i]);
|
|
p = istatbuf + strlen(istatbuf);
|
|
}
|
|
sprintf(p, "\nflags:\t");
|
|
p = istatbuf + strlen(istatbuf);
|
|
for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
|
|
if (dev->drv[i]) {
|
|
sprintf(p, "%ld ", dev->drv[i]->online);
|
|
p = istatbuf + strlen(istatbuf);
|
|
} else {
|
|
sprintf(p, "? ");
|
|
p = istatbuf + strlen(istatbuf);
|
|
}
|
|
}
|
|
sprintf(p, "\nphone:\t");
|
|
p = istatbuf + strlen(istatbuf);
|
|
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
|
|
sprintf(p, "%s ", dev->num[i]);
|
|
p = istatbuf + strlen(istatbuf);
|
|
}
|
|
sprintf(p, "\n");
|
|
return istatbuf;
|
|
}
|
|
|
|
/* Module interface-code */
|
|
|
|
void
|
|
isdn_info_update(void)
|
|
{
|
|
infostruct *p = dev->infochain;
|
|
|
|
while (p) {
|
|
*(p->private) = 1;
|
|
p = (infostruct *) p->next;
|
|
}
|
|
wake_up_interruptible(&(dev->info_waitq));
|
|
}
|
|
|
|
static ssize_t
|
|
isdn_read(struct file *file, char __user *buf, size_t count, loff_t *off)
|
|
{
|
|
uint minor = iminor(file_inode(file));
|
|
int len = 0;
|
|
int drvidx;
|
|
int chidx;
|
|
int retval;
|
|
char *p;
|
|
|
|
mutex_lock(&isdn_mutex);
|
|
if (minor == ISDN_MINOR_STATUS) {
|
|
if (!file->private_data) {
|
|
if (file->f_flags & O_NONBLOCK) {
|
|
retval = -EAGAIN;
|
|
goto out;
|
|
}
|
|
wait_event_interruptible(dev->info_waitq,
|
|
file->private_data);
|
|
}
|
|
p = isdn_statstr();
|
|
file->private_data = NULL;
|
|
if ((len = strlen(p)) <= count) {
|
|
if (copy_to_user(buf, p, len)) {
|
|
retval = -EFAULT;
|
|
goto out;
|
|
}
|
|
*off += len;
|
|
retval = len;
|
|
goto out;
|
|
}
|
|
retval = 0;
|
|
goto out;
|
|
}
|
|
if (!dev->drivers) {
|
|
retval = -ENODEV;
|
|
goto out;
|
|
}
|
|
if (minor <= ISDN_MINOR_BMAX) {
|
|
printk(KERN_WARNING "isdn_read minor %d obsolete!\n", minor);
|
|
drvidx = isdn_minor2drv(minor);
|
|
if (drvidx < 0) {
|
|
retval = -ENODEV;
|
|
goto out;
|
|
}
|
|
if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
|
|
retval = -ENODEV;
|
|
goto out;
|
|
}
|
|
chidx = isdn_minor2chan(minor);
|
|
if (!(p = kmalloc(count, GFP_KERNEL))) {
|
|
retval = -ENOMEM;
|
|
goto out;
|
|
}
|
|
len = isdn_readbchan(drvidx, chidx, p, NULL, count,
|
|
&dev->drv[drvidx]->rcv_waitq[chidx]);
|
|
*off += len;
|
|
if (copy_to_user(buf, p, len))
|
|
len = -EFAULT;
|
|
kfree(p);
|
|
retval = len;
|
|
goto out;
|
|
}
|
|
if (minor <= ISDN_MINOR_CTRLMAX) {
|
|
drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
|
|
if (drvidx < 0) {
|
|
retval = -ENODEV;
|
|
goto out;
|
|
}
|
|
if (!dev->drv[drvidx]->stavail) {
|
|
if (file->f_flags & O_NONBLOCK) {
|
|
retval = -EAGAIN;
|
|
goto out;
|
|
}
|
|
wait_event_interruptible(dev->drv[drvidx]->st_waitq,
|
|
dev->drv[drvidx]->stavail);
|
|
}
|
|
if (dev->drv[drvidx]->interface->readstat) {
|
|
if (count > dev->drv[drvidx]->stavail)
|
|
count = dev->drv[drvidx]->stavail;
|
|
len = dev->drv[drvidx]->interface->readstat(buf, count,
|
|
drvidx, isdn_minor2chan(minor - ISDN_MINOR_CTRL));
|
|
if (len < 0) {
|
|
retval = len;
|
|
goto out;
|
|
}
|
|
} else {
|
|
len = 0;
|
|
}
|
|
if (len)
|
|
dev->drv[drvidx]->stavail -= len;
|
|
else
|
|
dev->drv[drvidx]->stavail = 0;
|
|
*off += len;
|
|
retval = len;
|
|
goto out;
|
|
}
|
|
#ifdef CONFIG_ISDN_PPP
|
|
if (minor <= ISDN_MINOR_PPPMAX) {
|
|
retval = isdn_ppp_read(minor - ISDN_MINOR_PPP, file, buf, count);
|
|
goto out;
|
|
}
|
|
#endif
|
|
retval = -ENODEV;
|
|
out:
|
|
mutex_unlock(&isdn_mutex);
|
|
return retval;
|
|
}
|
|
|
|
static ssize_t
|
|
isdn_write(struct file *file, const char __user *buf, size_t count, loff_t *off)
|
|
{
|
|
uint minor = iminor(file_inode(file));
|
|
int drvidx;
|
|
int chidx;
|
|
int retval;
|
|
|
|
if (minor == ISDN_MINOR_STATUS)
|
|
return -EPERM;
|
|
if (!dev->drivers)
|
|
return -ENODEV;
|
|
|
|
mutex_lock(&isdn_mutex);
|
|
if (minor <= ISDN_MINOR_BMAX) {
|
|
printk(KERN_WARNING "isdn_write minor %d obsolete!\n", minor);
|
|
drvidx = isdn_minor2drv(minor);
|
|
if (drvidx < 0) {
|
|
retval = -ENODEV;
|
|
goto out;
|
|
}
|
|
if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
|
|
retval = -ENODEV;
|
|
goto out;
|
|
}
|
|
chidx = isdn_minor2chan(minor);
|
|
wait_event_interruptible(dev->drv[drvidx]->snd_waitq[chidx],
|
|
(retval = isdn_writebuf_stub(drvidx, chidx, buf, count)));
|
|
goto out;
|
|
}
|
|
if (minor <= ISDN_MINOR_CTRLMAX) {
|
|
drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
|
|
if (drvidx < 0) {
|
|
retval = -ENODEV;
|
|
goto out;
|
|
}
|
|
/*
|
|
* We want to use the isdnctrl device to load the firmware
|
|
*
|
|
if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
|
|
return -ENODEV;
|
|
*/
|
|
if (dev->drv[drvidx]->interface->writecmd)
|
|
retval = dev->drv[drvidx]->interface->
|
|
writecmd(buf, count, drvidx,
|
|
isdn_minor2chan(minor - ISDN_MINOR_CTRL));
|
|
else
|
|
retval = count;
|
|
goto out;
|
|
}
|
|
#ifdef CONFIG_ISDN_PPP
|
|
if (minor <= ISDN_MINOR_PPPMAX) {
|
|
retval = isdn_ppp_write(minor - ISDN_MINOR_PPP, file, buf, count);
|
|
goto out;
|
|
}
|
|
#endif
|
|
retval = -ENODEV;
|
|
out:
|
|
mutex_unlock(&isdn_mutex);
|
|
return retval;
|
|
}
|
|
|
|
static __poll_t
|
|
isdn_poll(struct file *file, poll_table *wait)
|
|
{
|
|
__poll_t mask = 0;
|
|
unsigned int minor = iminor(file_inode(file));
|
|
int drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
|
|
|
|
mutex_lock(&isdn_mutex);
|
|
if (minor == ISDN_MINOR_STATUS) {
|
|
poll_wait(file, &(dev->info_waitq), wait);
|
|
/* mask = EPOLLOUT | EPOLLWRNORM; */
|
|
if (file->private_data) {
|
|
mask |= EPOLLIN | EPOLLRDNORM;
|
|
}
|
|
goto out;
|
|
}
|
|
if (minor >= ISDN_MINOR_CTRL && minor <= ISDN_MINOR_CTRLMAX) {
|
|
if (drvidx < 0) {
|
|
/* driver deregistered while file open */
|
|
mask = EPOLLHUP;
|
|
goto out;
|
|
}
|
|
poll_wait(file, &(dev->drv[drvidx]->st_waitq), wait);
|
|
mask = EPOLLOUT | EPOLLWRNORM;
|
|
if (dev->drv[drvidx]->stavail) {
|
|
mask |= EPOLLIN | EPOLLRDNORM;
|
|
}
|
|
goto out;
|
|
}
|
|
#ifdef CONFIG_ISDN_PPP
|
|
if (minor <= ISDN_MINOR_PPPMAX) {
|
|
mask = isdn_ppp_poll(file, wait);
|
|
goto out;
|
|
}
|
|
#endif
|
|
mask = EPOLLERR;
|
|
out:
|
|
mutex_unlock(&isdn_mutex);
|
|
return mask;
|
|
}
|
|
|
|
|
|
static int
|
|
isdn_ioctl(struct file *file, uint cmd, ulong arg)
|
|
{
|
|
uint minor = iminor(file_inode(file));
|
|
isdn_ctrl c;
|
|
int drvidx;
|
|
int ret;
|
|
int i;
|
|
char __user *p;
|
|
char *s;
|
|
union iocpar {
|
|
char name[10];
|
|
char bname[22];
|
|
isdn_ioctl_struct iocts;
|
|
isdn_net_ioctl_phone phone;
|
|
isdn_net_ioctl_cfg cfg;
|
|
} iocpar;
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
#define name iocpar.name
|
|
#define bname iocpar.bname
|
|
#define iocts iocpar.iocts
|
|
#define phone iocpar.phone
|
|
#define cfg iocpar.cfg
|
|
|
|
if (minor == ISDN_MINOR_STATUS) {
|
|
switch (cmd) {
|
|
case IIOCGETDVR:
|
|
return (TTY_DV +
|
|
(NET_DV << 8) +
|
|
(INF_DV << 16));
|
|
case IIOCGETCPS:
|
|
if (arg) {
|
|
ulong __user *p = argp;
|
|
int i;
|
|
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
|
|
put_user(dev->ibytes[i], p++);
|
|
put_user(dev->obytes[i], p++);
|
|
}
|
|
return 0;
|
|
} else
|
|
return -EINVAL;
|
|
break;
|
|
case IIOCNETGPN:
|
|
/* Get peer phone number of a connected
|
|
* isdn network interface */
|
|
if (arg) {
|
|
if (copy_from_user(&phone, argp, sizeof(phone)))
|
|
return -EFAULT;
|
|
return isdn_net_getpeer(&phone, argp);
|
|
} else
|
|
return -EINVAL;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
if (!dev->drivers)
|
|
return -ENODEV;
|
|
if (minor <= ISDN_MINOR_BMAX) {
|
|
drvidx = isdn_minor2drv(minor);
|
|
if (drvidx < 0)
|
|
return -ENODEV;
|
|
if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
|
|
return -ENODEV;
|
|
return 0;
|
|
}
|
|
if (minor <= ISDN_MINOR_CTRLMAX) {
|
|
/*
|
|
* isdn net devices manage lots of configuration variables as linked lists.
|
|
* Those lists must only be manipulated from user space. Some of the ioctl's
|
|
* service routines access user space and are not atomic. Therefore, ioctl's
|
|
* manipulating the lists and ioctl's sleeping while accessing the lists
|
|
* are serialized by means of a semaphore.
|
|
*/
|
|
switch (cmd) {
|
|
case IIOCNETDWRSET:
|
|
printk(KERN_INFO "INFO: ISDN_DW_ABC_EXTENSION not enabled\n");
|
|
return (-EINVAL);
|
|
case IIOCNETLCR:
|
|
printk(KERN_INFO "INFO: ISDN_ABC_LCR_SUPPORT not enabled\n");
|
|
return -ENODEV;
|
|
case IIOCNETAIF:
|
|
/* Add a network-interface */
|
|
if (arg) {
|
|
if (copy_from_user(name, argp, sizeof(name)))
|
|
return -EFAULT;
|
|
s = name;
|
|
} else {
|
|
s = NULL;
|
|
}
|
|
ret = mutex_lock_interruptible(&dev->mtx);
|
|
if (ret) return ret;
|
|
if ((s = isdn_net_new(s, NULL))) {
|
|
if (copy_to_user(argp, s, strlen(s) + 1)) {
|
|
ret = -EFAULT;
|
|
} else {
|
|
ret = 0;
|
|
}
|
|
} else
|
|
ret = -ENODEV;
|
|
mutex_unlock(&dev->mtx);
|
|
return ret;
|
|
case IIOCNETASL:
|
|
/* Add a slave to a network-interface */
|
|
if (arg) {
|
|
if (copy_from_user(bname, argp, sizeof(bname) - 1))
|
|
return -EFAULT;
|
|
bname[sizeof(bname)-1] = 0;
|
|
} else
|
|
return -EINVAL;
|
|
ret = mutex_lock_interruptible(&dev->mtx);
|
|
if (ret) return ret;
|
|
if ((s = isdn_net_newslave(bname))) {
|
|
if (copy_to_user(argp, s, strlen(s) + 1)) {
|
|
ret = -EFAULT;
|
|
} else {
|
|
ret = 0;
|
|
}
|
|
} else
|
|
ret = -ENODEV;
|
|
mutex_unlock(&dev->mtx);
|
|
return ret;
|
|
case IIOCNETDIF:
|
|
/* Delete a network-interface */
|
|
if (arg) {
|
|
if (copy_from_user(name, argp, sizeof(name)))
|
|
return -EFAULT;
|
|
ret = mutex_lock_interruptible(&dev->mtx);
|
|
if (ret) return ret;
|
|
ret = isdn_net_rm(name);
|
|
mutex_unlock(&dev->mtx);
|
|
return ret;
|
|
} else
|
|
return -EINVAL;
|
|
case IIOCNETSCF:
|
|
/* Set configurable parameters of a network-interface */
|
|
if (arg) {
|
|
if (copy_from_user(&cfg, argp, sizeof(cfg)))
|
|
return -EFAULT;
|
|
return isdn_net_setcfg(&cfg);
|
|
} else
|
|
return -EINVAL;
|
|
case IIOCNETGCF:
|
|
/* Get configurable parameters of a network-interface */
|
|
if (arg) {
|
|
if (copy_from_user(&cfg, argp, sizeof(cfg)))
|
|
return -EFAULT;
|
|
if (!(ret = isdn_net_getcfg(&cfg))) {
|
|
if (copy_to_user(argp, &cfg, sizeof(cfg)))
|
|
return -EFAULT;
|
|
}
|
|
return ret;
|
|
} else
|
|
return -EINVAL;
|
|
case IIOCNETANM:
|
|
/* Add a phone-number to a network-interface */
|
|
if (arg) {
|
|
if (copy_from_user(&phone, argp, sizeof(phone)))
|
|
return -EFAULT;
|
|
ret = mutex_lock_interruptible(&dev->mtx);
|
|
if (ret) return ret;
|
|
ret = isdn_net_addphone(&phone);
|
|
mutex_unlock(&dev->mtx);
|
|
return ret;
|
|
} else
|
|
return -EINVAL;
|
|
case IIOCNETGNM:
|
|
/* Get list of phone-numbers of a network-interface */
|
|
if (arg) {
|
|
if (copy_from_user(&phone, argp, sizeof(phone)))
|
|
return -EFAULT;
|
|
ret = mutex_lock_interruptible(&dev->mtx);
|
|
if (ret) return ret;
|
|
ret = isdn_net_getphones(&phone, argp);
|
|
mutex_unlock(&dev->mtx);
|
|
return ret;
|
|
} else
|
|
return -EINVAL;
|
|
case IIOCNETDNM:
|
|
/* Delete a phone-number of a network-interface */
|
|
if (arg) {
|
|
if (copy_from_user(&phone, argp, sizeof(phone)))
|
|
return -EFAULT;
|
|
ret = mutex_lock_interruptible(&dev->mtx);
|
|
if (ret) return ret;
|
|
ret = isdn_net_delphone(&phone);
|
|
mutex_unlock(&dev->mtx);
|
|
return ret;
|
|
} else
|
|
return -EINVAL;
|
|
case IIOCNETDIL:
|
|
/* Force dialing of a network-interface */
|
|
if (arg) {
|
|
if (copy_from_user(name, argp, sizeof(name)))
|
|
return -EFAULT;
|
|
return isdn_net_force_dial(name);
|
|
} else
|
|
return -EINVAL;
|
|
#ifdef CONFIG_ISDN_PPP
|
|
case IIOCNETALN:
|
|
if (!arg)
|
|
return -EINVAL;
|
|
if (copy_from_user(name, argp, sizeof(name)))
|
|
return -EFAULT;
|
|
return isdn_ppp_dial_slave(name);
|
|
case IIOCNETDLN:
|
|
if (!arg)
|
|
return -EINVAL;
|
|
if (copy_from_user(name, argp, sizeof(name)))
|
|
return -EFAULT;
|
|
return isdn_ppp_hangup_slave(name);
|
|
#endif
|
|
case IIOCNETHUP:
|
|
/* Force hangup of a network-interface */
|
|
if (!arg)
|
|
return -EINVAL;
|
|
if (copy_from_user(name, argp, sizeof(name)))
|
|
return -EFAULT;
|
|
return isdn_net_force_hangup(name);
|
|
break;
|
|
case IIOCSETVER:
|
|
dev->net_verbose = arg;
|
|
printk(KERN_INFO "isdn: Verbose-Level is %d\n", dev->net_verbose);
|
|
return 0;
|
|
case IIOCSETGST:
|
|
if (arg)
|
|
dev->global_flags |= ISDN_GLOBAL_STOPPED;
|
|
else
|
|
dev->global_flags &= ~ISDN_GLOBAL_STOPPED;
|
|
printk(KERN_INFO "isdn: Global Mode %s\n",
|
|
(dev->global_flags & ISDN_GLOBAL_STOPPED) ? "stopped" : "running");
|
|
return 0;
|
|
case IIOCSETBRJ:
|
|
drvidx = -1;
|
|
if (arg) {
|
|
int i;
|
|
char *p;
|
|
if (copy_from_user(&iocts, argp,
|
|
sizeof(isdn_ioctl_struct)))
|
|
return -EFAULT;
|
|
iocts.drvid[sizeof(iocts.drvid) - 1] = 0;
|
|
if (strlen(iocts.drvid)) {
|
|
if ((p = strchr(iocts.drvid, ',')))
|
|
*p = 0;
|
|
drvidx = -1;
|
|
for (i = 0; i < ISDN_MAX_DRIVERS; i++)
|
|
if (!(strcmp(dev->drvid[i], iocts.drvid))) {
|
|
drvidx = i;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (drvidx == -1)
|
|
return -ENODEV;
|
|
if (iocts.arg)
|
|
dev->drv[drvidx]->flags |= DRV_FLAG_REJBUS;
|
|
else
|
|
dev->drv[drvidx]->flags &= ~DRV_FLAG_REJBUS;
|
|
return 0;
|
|
case IIOCSIGPRF:
|
|
dev->profd = current;
|
|
return 0;
|
|
break;
|
|
case IIOCGETPRF:
|
|
/* Get all Modem-Profiles */
|
|
if (arg) {
|
|
char __user *p = argp;
|
|
int i;
|
|
|
|
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
|
|
if (copy_to_user(p, dev->mdm.info[i].emu.profile,
|
|
ISDN_MODEM_NUMREG))
|
|
return -EFAULT;
|
|
p += ISDN_MODEM_NUMREG;
|
|
if (copy_to_user(p, dev->mdm.info[i].emu.pmsn, ISDN_MSNLEN))
|
|
return -EFAULT;
|
|
p += ISDN_MSNLEN;
|
|
if (copy_to_user(p, dev->mdm.info[i].emu.plmsn, ISDN_LMSNLEN))
|
|
return -EFAULT;
|
|
p += ISDN_LMSNLEN;
|
|
}
|
|
return (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN) * ISDN_MAX_CHANNELS;
|
|
} else
|
|
return -EINVAL;
|
|
break;
|
|
case IIOCSETPRF:
|
|
/* Set all Modem-Profiles */
|
|
if (arg) {
|
|
char __user *p = argp;
|
|
int i;
|
|
|
|
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
|
|
if (copy_from_user(dev->mdm.info[i].emu.profile, p,
|
|
ISDN_MODEM_NUMREG))
|
|
return -EFAULT;
|
|
p += ISDN_MODEM_NUMREG;
|
|
if (copy_from_user(dev->mdm.info[i].emu.plmsn, p, ISDN_LMSNLEN))
|
|
return -EFAULT;
|
|
p += ISDN_LMSNLEN;
|
|
if (copy_from_user(dev->mdm.info[i].emu.pmsn, p, ISDN_MSNLEN))
|
|
return -EFAULT;
|
|
p += ISDN_MSNLEN;
|
|
}
|
|
return 0;
|
|
} else
|
|
return -EINVAL;
|
|
break;
|
|
case IIOCSETMAP:
|
|
case IIOCGETMAP:
|
|
/* Set/Get MSN->EAZ-Mapping for a driver */
|
|
if (arg) {
|
|
|
|
if (copy_from_user(&iocts, argp,
|
|
sizeof(isdn_ioctl_struct)))
|
|
return -EFAULT;
|
|
iocts.drvid[sizeof(iocts.drvid) - 1] = 0;
|
|
if (strlen(iocts.drvid)) {
|
|
drvidx = -1;
|
|
for (i = 0; i < ISDN_MAX_DRIVERS; i++)
|
|
if (!(strcmp(dev->drvid[i], iocts.drvid))) {
|
|
drvidx = i;
|
|
break;
|
|
}
|
|
} else
|
|
drvidx = 0;
|
|
if (drvidx == -1)
|
|
return -ENODEV;
|
|
if (cmd == IIOCSETMAP) {
|
|
int loop = 1;
|
|
|
|
p = (char __user *) iocts.arg;
|
|
i = 0;
|
|
while (loop) {
|
|
int j = 0;
|
|
|
|
while (1) {
|
|
get_user(bname[j], p++);
|
|
switch (bname[j]) {
|
|
case '\0':
|
|
loop = 0;
|
|
/* Fall through */
|
|
case ',':
|
|
bname[j] = '\0';
|
|
strcpy(dev->drv[drvidx]->msn2eaz[i], bname);
|
|
j = ISDN_MSNLEN;
|
|
break;
|
|
default:
|
|
j++;
|
|
}
|
|
if (j >= ISDN_MSNLEN)
|
|
break;
|
|
}
|
|
if (++i > 9)
|
|
break;
|
|
}
|
|
} else {
|
|
p = (char __user *) iocts.arg;
|
|
for (i = 0; i < 10; i++) {
|
|
snprintf(bname, sizeof(bname), "%s%s",
|
|
strlen(dev->drv[drvidx]->msn2eaz[i]) ?
|
|
dev->drv[drvidx]->msn2eaz[i] : "_",
|
|
(i < 9) ? "," : "\0");
|
|
if (copy_to_user(p, bname, strlen(bname) + 1))
|
|
return -EFAULT;
|
|
p += strlen(bname);
|
|
}
|
|
}
|
|
return 0;
|
|
} else
|
|
return -EINVAL;
|
|
case IIOCDBGVAR:
|
|
return -EINVAL;
|
|
default:
|
|
if ((cmd & IIOCDRVCTL) == IIOCDRVCTL)
|
|
cmd = ((cmd >> _IOC_NRSHIFT) & _IOC_NRMASK) & ISDN_DRVIOCTL_MASK;
|
|
else
|
|
return -EINVAL;
|
|
if (arg) {
|
|
int i;
|
|
char *p;
|
|
if (copy_from_user(&iocts, argp, sizeof(isdn_ioctl_struct)))
|
|
return -EFAULT;
|
|
iocts.drvid[sizeof(iocts.drvid) - 1] = 0;
|
|
if (strlen(iocts.drvid)) {
|
|
if ((p = strchr(iocts.drvid, ',')))
|
|
*p = 0;
|
|
drvidx = -1;
|
|
for (i = 0; i < ISDN_MAX_DRIVERS; i++)
|
|
if (!(strcmp(dev->drvid[i], iocts.drvid))) {
|
|
drvidx = i;
|
|
break;
|
|
}
|
|
} else
|
|
drvidx = 0;
|
|
if (drvidx == -1)
|
|
return -ENODEV;
|
|
c.driver = drvidx;
|
|
c.command = ISDN_CMD_IOCTL;
|
|
c.arg = cmd;
|
|
memcpy(c.parm.num, &iocts.arg, sizeof(ulong));
|
|
ret = isdn_command(&c);
|
|
memcpy(&iocts.arg, c.parm.num, sizeof(ulong));
|
|
if (copy_to_user(argp, &iocts, sizeof(isdn_ioctl_struct)))
|
|
return -EFAULT;
|
|
return ret;
|
|
} else
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
#ifdef CONFIG_ISDN_PPP
|
|
if (minor <= ISDN_MINOR_PPPMAX)
|
|
return (isdn_ppp_ioctl(minor - ISDN_MINOR_PPP, file, cmd, arg));
|
|
#endif
|
|
return -ENODEV;
|
|
|
|
#undef name
|
|
#undef bname
|
|
#undef iocts
|
|
#undef phone
|
|
#undef cfg
|
|
}
|
|
|
|
static long
|
|
isdn_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
|
{
|
|
int ret;
|
|
|
|
mutex_lock(&isdn_mutex);
|
|
ret = isdn_ioctl(file, cmd, arg);
|
|
mutex_unlock(&isdn_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Open the device code.
|
|
*/
|
|
static int
|
|
isdn_open(struct inode *ino, struct file *filep)
|
|
{
|
|
uint minor = iminor(ino);
|
|
int drvidx;
|
|
int chidx;
|
|
int retval = -ENODEV;
|
|
|
|
mutex_lock(&isdn_mutex);
|
|
if (minor == ISDN_MINOR_STATUS) {
|
|
infostruct *p;
|
|
|
|
if ((p = kmalloc(sizeof(infostruct), GFP_KERNEL))) {
|
|
p->next = (char *) dev->infochain;
|
|
p->private = (char *) &(filep->private_data);
|
|
dev->infochain = p;
|
|
/* At opening we allow a single update */
|
|
filep->private_data = (char *) 1;
|
|
retval = 0;
|
|
goto out;
|
|
} else {
|
|
retval = -ENOMEM;
|
|
goto out;
|
|
}
|
|
}
|
|
if (!dev->channels)
|
|
goto out;
|
|
if (minor <= ISDN_MINOR_BMAX) {
|
|
printk(KERN_WARNING "isdn_open minor %d obsolete!\n", minor);
|
|
drvidx = isdn_minor2drv(minor);
|
|
if (drvidx < 0)
|
|
goto out;
|
|
chidx = isdn_minor2chan(minor);
|
|
if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
|
|
goto out;
|
|
if (!(dev->drv[drvidx]->online & (1 << chidx)))
|
|
goto out;
|
|
isdn_lock_drivers();
|
|
retval = 0;
|
|
goto out;
|
|
}
|
|
if (minor <= ISDN_MINOR_CTRLMAX) {
|
|
drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
|
|
if (drvidx < 0)
|
|
goto out;
|
|
isdn_lock_drivers();
|
|
retval = 0;
|
|
goto out;
|
|
}
|
|
#ifdef CONFIG_ISDN_PPP
|
|
if (minor <= ISDN_MINOR_PPPMAX) {
|
|
retval = isdn_ppp_open(minor - ISDN_MINOR_PPP, filep);
|
|
if (retval == 0)
|
|
isdn_lock_drivers();
|
|
goto out;
|
|
}
|
|
#endif
|
|
out:
|
|
nonseekable_open(ino, filep);
|
|
mutex_unlock(&isdn_mutex);
|
|
return retval;
|
|
}
|
|
|
|
static int
|
|
isdn_close(struct inode *ino, struct file *filep)
|
|
{
|
|
uint minor = iminor(ino);
|
|
|
|
mutex_lock(&isdn_mutex);
|
|
if (minor == ISDN_MINOR_STATUS) {
|
|
infostruct *p = dev->infochain;
|
|
infostruct *q = NULL;
|
|
|
|
while (p) {
|
|
if (p->private == (char *) &(filep->private_data)) {
|
|
if (q)
|
|
q->next = p->next;
|
|
else
|
|
dev->infochain = (infostruct *) (p->next);
|
|
kfree(p);
|
|
goto out;
|
|
}
|
|
q = p;
|
|
p = (infostruct *) (p->next);
|
|
}
|
|
printk(KERN_WARNING "isdn: No private data while closing isdnctrl\n");
|
|
goto out;
|
|
}
|
|
isdn_unlock_drivers();
|
|
if (minor <= ISDN_MINOR_BMAX)
|
|
goto out;
|
|
if (minor <= ISDN_MINOR_CTRLMAX) {
|
|
if (dev->profd == current)
|
|
dev->profd = NULL;
|
|
goto out;
|
|
}
|
|
#ifdef CONFIG_ISDN_PPP
|
|
if (minor <= ISDN_MINOR_PPPMAX)
|
|
isdn_ppp_release(minor - ISDN_MINOR_PPP, filep);
|
|
#endif
|
|
|
|
out:
|
|
mutex_unlock(&isdn_mutex);
|
|
return 0;
|
|
}
|
|
|
|
static const struct file_operations isdn_fops =
|
|
{
|
|
.owner = THIS_MODULE,
|
|
.llseek = no_llseek,
|
|
.read = isdn_read,
|
|
.write = isdn_write,
|
|
.poll = isdn_poll,
|
|
.unlocked_ioctl = isdn_unlocked_ioctl,
|
|
.open = isdn_open,
|
|
.release = isdn_close,
|
|
};
|
|
|
|
char *
|
|
isdn_map_eaz2msn(char *msn, int di)
|
|
{
|
|
isdn_driver_t *this = dev->drv[di];
|
|
int i;
|
|
|
|
if (strlen(msn) == 1) {
|
|
i = msn[0] - '0';
|
|
if ((i >= 0) && (i <= 9))
|
|
if (strlen(this->msn2eaz[i]))
|
|
return (this->msn2eaz[i]);
|
|
}
|
|
return (msn);
|
|
}
|
|
|
|
/*
|
|
* Find an unused ISDN-channel, whose feature-flags match the
|
|
* given L2- and L3-protocols.
|
|
*/
|
|
#define L2V (~(ISDN_FEATURE_L2_V11096 | ISDN_FEATURE_L2_V11019 | ISDN_FEATURE_L2_V11038))
|
|
|
|
/*
|
|
* This function must be called with holding the dev->lock.
|
|
*/
|
|
int
|
|
isdn_get_free_channel(int usage, int l2_proto, int l3_proto, int pre_dev
|
|
, int pre_chan, char *msn)
|
|
{
|
|
int i;
|
|
ulong features;
|
|
ulong vfeatures;
|
|
|
|
features = ((1 << l2_proto) | (0x10000 << l3_proto));
|
|
vfeatures = (((1 << l2_proto) | (0x10000 << l3_proto)) &
|
|
~(ISDN_FEATURE_L2_V11096 | ISDN_FEATURE_L2_V11019 | ISDN_FEATURE_L2_V11038));
|
|
/* If Layer-2 protocol is V.110, accept drivers with
|
|
* transparent feature even if these don't support V.110
|
|
* because we can emulate this in linklevel.
|
|
*/
|
|
for (i = 0; i < ISDN_MAX_CHANNELS; i++)
|
|
if (USG_NONE(dev->usage[i]) &&
|
|
(dev->drvmap[i] != -1)) {
|
|
int d = dev->drvmap[i];
|
|
if ((dev->usage[i] & ISDN_USAGE_EXCLUSIVE) &&
|
|
((pre_dev != d) || (pre_chan != dev->chanmap[i])))
|
|
continue;
|
|
if (!strcmp(isdn_map_eaz2msn(msn, d), "-"))
|
|
continue;
|
|
if (dev->usage[i] & ISDN_USAGE_DISABLED)
|
|
continue; /* usage not allowed */
|
|
if (dev->drv[d]->flags & DRV_FLAG_RUNNING) {
|
|
if (((dev->drv[d]->interface->features & features) == features) ||
|
|
(((dev->drv[d]->interface->features & vfeatures) == vfeatures) &&
|
|
(dev->drv[d]->interface->features & ISDN_FEATURE_L2_TRANS))) {
|
|
if ((pre_dev < 0) || (pre_chan < 0)) {
|
|
dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
|
|
dev->usage[i] |= usage;
|
|
isdn_info_update();
|
|
return i;
|
|
} else {
|
|
if ((pre_dev == d) && (pre_chan == dev->chanmap[i])) {
|
|
dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
|
|
dev->usage[i] |= usage;
|
|
isdn_info_update();
|
|
return i;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Set state of ISDN-channel to 'unused'
|
|
*/
|
|
void
|
|
isdn_free_channel(int di, int ch, int usage)
|
|
{
|
|
int i;
|
|
|
|
if ((di < 0) || (ch < 0)) {
|
|
printk(KERN_WARNING "%s: called with invalid drv(%d) or channel(%d)\n",
|
|
__func__, di, ch);
|
|
return;
|
|
}
|
|
for (i = 0; i < ISDN_MAX_CHANNELS; i++)
|
|
if (((!usage) || ((dev->usage[i] & ISDN_USAGE_MASK) == usage)) &&
|
|
(dev->drvmap[i] == di) &&
|
|
(dev->chanmap[i] == ch)) {
|
|
dev->usage[i] &= (ISDN_USAGE_NONE | ISDN_USAGE_EXCLUSIVE);
|
|
strcpy(dev->num[i], "???");
|
|
dev->ibytes[i] = 0;
|
|
dev->obytes[i] = 0;
|
|
// 20.10.99 JIM, try to reinitialize v110 !
|
|
dev->v110emu[i] = 0;
|
|
atomic_set(&(dev->v110use[i]), 0);
|
|
isdn_v110_close(dev->v110[i]);
|
|
dev->v110[i] = NULL;
|
|
// 20.10.99 JIM, try to reinitialize v110 !
|
|
isdn_info_update();
|
|
if (dev->drv[di])
|
|
skb_queue_purge(&dev->drv[di]->rpqueue[ch]);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Cancel Exclusive-Flag for ISDN-channel
|
|
*/
|
|
void
|
|
isdn_unexclusive_channel(int di, int ch)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ISDN_MAX_CHANNELS; i++)
|
|
if ((dev->drvmap[i] == di) &&
|
|
(dev->chanmap[i] == ch)) {
|
|
dev->usage[i] &= ~ISDN_USAGE_EXCLUSIVE;
|
|
isdn_info_update();
|
|
return;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* writebuf replacement for SKB_ABLE drivers
|
|
*/
|
|
static int
|
|
isdn_writebuf_stub(int drvidx, int chan, const u_char __user *buf, int len)
|
|
{
|
|
int ret;
|
|
int hl = dev->drv[drvidx]->interface->hl_hdrlen;
|
|
struct sk_buff *skb = alloc_skb(hl + len, GFP_ATOMIC);
|
|
|
|
if (!skb)
|
|
return -ENOMEM;
|
|
skb_reserve(skb, hl);
|
|
if (copy_from_user(skb_put(skb, len), buf, len)) {
|
|
dev_kfree_skb(skb);
|
|
return -EFAULT;
|
|
}
|
|
ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, 1, skb);
|
|
if (ret <= 0)
|
|
dev_kfree_skb(skb);
|
|
if (ret > 0)
|
|
dev->obytes[isdn_dc2minor(drvidx, chan)] += ret;
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Return: length of data on success, -ERRcode on failure.
|
|
*/
|
|
int
|
|
isdn_writebuf_skb_stub(int drvidx, int chan, int ack, struct sk_buff *skb)
|
|
{
|
|
int ret;
|
|
struct sk_buff *nskb = NULL;
|
|
int v110_ret = skb->len;
|
|
int idx = isdn_dc2minor(drvidx, chan);
|
|
|
|
if (dev->v110[idx]) {
|
|
atomic_inc(&dev->v110use[idx]);
|
|
nskb = isdn_v110_encode(dev->v110[idx], skb);
|
|
atomic_dec(&dev->v110use[idx]);
|
|
if (!nskb)
|
|
return 0;
|
|
v110_ret = *((int *)nskb->data);
|
|
skb_pull(nskb, sizeof(int));
|
|
if (!nskb->len) {
|
|
dev_kfree_skb(nskb);
|
|
return v110_ret;
|
|
}
|
|
/* V.110 must always be acknowledged */
|
|
ack = 1;
|
|
ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, nskb);
|
|
} else {
|
|
int hl = dev->drv[drvidx]->interface->hl_hdrlen;
|
|
|
|
if (skb_headroom(skb) < hl) {
|
|
/*
|
|
* This should only occur when new HL driver with
|
|
* increased hl_hdrlen was loaded after netdevice
|
|
* was created and connected to the new driver.
|
|
*
|
|
* The V.110 branch (re-allocates on its own) does
|
|
* not need this
|
|
*/
|
|
struct sk_buff *skb_tmp;
|
|
|
|
skb_tmp = skb_realloc_headroom(skb, hl);
|
|
printk(KERN_DEBUG "isdn_writebuf_skb_stub: reallocating headroom%s\n", skb_tmp ? "" : " failed");
|
|
if (!skb_tmp) return -ENOMEM; /* 0 better? */
|
|
ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb_tmp);
|
|
if (ret > 0) {
|
|
dev_kfree_skb(skb);
|
|
} else {
|
|
dev_kfree_skb(skb_tmp);
|
|
}
|
|
} else {
|
|
ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb);
|
|
}
|
|
}
|
|
if (ret > 0) {
|
|
dev->obytes[idx] += ret;
|
|
if (dev->v110[idx]) {
|
|
atomic_inc(&dev->v110use[idx]);
|
|
dev->v110[idx]->skbuser++;
|
|
atomic_dec(&dev->v110use[idx]);
|
|
/* For V.110 return unencoded data length */
|
|
ret = v110_ret;
|
|
/* if the complete frame was send we free the skb;
|
|
if not upper function will requeue the skb */
|
|
if (ret == skb->len)
|
|
dev_kfree_skb(skb);
|
|
}
|
|
} else
|
|
if (dev->v110[idx])
|
|
dev_kfree_skb(nskb);
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding)
|
|
{
|
|
int j, k, m;
|
|
|
|
init_waitqueue_head(&d->st_waitq);
|
|
if (d->flags & DRV_FLAG_RUNNING)
|
|
return -1;
|
|
if (n < 1) return 0;
|
|
|
|
m = (adding) ? d->channels + n : n;
|
|
|
|
if (dev->channels + n > ISDN_MAX_CHANNELS) {
|
|
printk(KERN_WARNING "register_isdn: Max. %d channels supported\n",
|
|
ISDN_MAX_CHANNELS);
|
|
return -1;
|
|
}
|
|
|
|
if ((adding) && (d->rcverr))
|
|
kfree(d->rcverr);
|
|
if (!(d->rcverr = kcalloc(m, sizeof(int), GFP_ATOMIC))) {
|
|
printk(KERN_WARNING "register_isdn: Could not alloc rcverr\n");
|
|
return -1;
|
|
}
|
|
|
|
if ((adding) && (d->rcvcount))
|
|
kfree(d->rcvcount);
|
|
if (!(d->rcvcount = kcalloc(m, sizeof(int), GFP_ATOMIC))) {
|
|
printk(KERN_WARNING "register_isdn: Could not alloc rcvcount\n");
|
|
if (!adding)
|
|
kfree(d->rcverr);
|
|
return -1;
|
|
}
|
|
|
|
if ((adding) && (d->rpqueue)) {
|
|
for (j = 0; j < d->channels; j++)
|
|
skb_queue_purge(&d->rpqueue[j]);
|
|
kfree(d->rpqueue);
|
|
}
|
|
d->rpqueue = kmalloc_array(m, sizeof(struct sk_buff_head), GFP_ATOMIC);
|
|
if (!d->rpqueue) {
|
|
printk(KERN_WARNING "register_isdn: Could not alloc rpqueue\n");
|
|
if (!adding) {
|
|
kfree(d->rcvcount);
|
|
kfree(d->rcverr);
|
|
}
|
|
return -1;
|
|
}
|
|
for (j = 0; j < m; j++) {
|
|
skb_queue_head_init(&d->rpqueue[j]);
|
|
}
|
|
|
|
if ((adding) && (d->rcv_waitq))
|
|
kfree(d->rcv_waitq);
|
|
d->rcv_waitq = kmalloc(array3_size(sizeof(wait_queue_head_t), 2, m),
|
|
GFP_ATOMIC);
|
|
if (!d->rcv_waitq) {
|
|
printk(KERN_WARNING "register_isdn: Could not alloc rcv_waitq\n");
|
|
if (!adding) {
|
|
kfree(d->rpqueue);
|
|
kfree(d->rcvcount);
|
|
kfree(d->rcverr);
|
|
}
|
|
return -1;
|
|
}
|
|
d->snd_waitq = d->rcv_waitq + m;
|
|
for (j = 0; j < m; j++) {
|
|
init_waitqueue_head(&d->rcv_waitq[j]);
|
|
init_waitqueue_head(&d->snd_waitq[j]);
|
|
}
|
|
|
|
dev->channels += n;
|
|
for (j = d->channels; j < m; j++)
|
|
for (k = 0; k < ISDN_MAX_CHANNELS; k++)
|
|
if (dev->chanmap[k] < 0) {
|
|
dev->chanmap[k] = j;
|
|
dev->drvmap[k] = drvidx;
|
|
break;
|
|
}
|
|
d->channels = m;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Low-level-driver registration
|
|
*/
|
|
|
|
static void
|
|
set_global_features(void)
|
|
{
|
|
int drvidx;
|
|
|
|
dev->global_features = 0;
|
|
for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++) {
|
|
if (!dev->drv[drvidx])
|
|
continue;
|
|
if (dev->drv[drvidx]->interface)
|
|
dev->global_features |= dev->drv[drvidx]->interface->features;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_ISDN_DIVERSION
|
|
|
|
static char *map_drvname(int di)
|
|
{
|
|
if ((di < 0) || (di >= ISDN_MAX_DRIVERS))
|
|
return (NULL);
|
|
return (dev->drvid[di]); /* driver name */
|
|
} /* map_drvname */
|
|
|
|
static int map_namedrv(char *id)
|
|
{ int i;
|
|
|
|
for (i = 0; i < ISDN_MAX_DRIVERS; i++)
|
|
{ if (!strcmp(dev->drvid[i], id))
|
|
return (i);
|
|
}
|
|
return (-1);
|
|
} /* map_namedrv */
|
|
|
|
int DIVERT_REG_NAME(isdn_divert_if *i_div)
|
|
{
|
|
if (i_div->if_magic != DIVERT_IF_MAGIC)
|
|
return (DIVERT_VER_ERR);
|
|
switch (i_div->cmd)
|
|
{
|
|
case DIVERT_CMD_REL:
|
|
if (divert_if != i_div)
|
|
return (DIVERT_REL_ERR);
|
|
divert_if = NULL; /* free interface */
|
|
return (DIVERT_NO_ERR);
|
|
|
|
case DIVERT_CMD_REG:
|
|
if (divert_if)
|
|
return (DIVERT_REG_ERR);
|
|
i_div->ll_cmd = isdn_command; /* set command function */
|
|
i_div->drv_to_name = map_drvname;
|
|
i_div->name_to_drv = map_namedrv;
|
|
divert_if = i_div; /* remember interface */
|
|
return (DIVERT_NO_ERR);
|
|
|
|
default:
|
|
return (DIVERT_CMD_ERR);
|
|
}
|
|
} /* DIVERT_REG_NAME */
|
|
|
|
EXPORT_SYMBOL(DIVERT_REG_NAME);
|
|
|
|
#endif /* CONFIG_ISDN_DIVERSION */
|
|
|
|
|
|
EXPORT_SYMBOL(register_isdn);
|
|
#ifdef CONFIG_ISDN_PPP
|
|
EXPORT_SYMBOL(isdn_ppp_register_compressor);
|
|
EXPORT_SYMBOL(isdn_ppp_unregister_compressor);
|
|
#endif
|
|
|
|
int
|
|
register_isdn(isdn_if *i)
|
|
{
|
|
isdn_driver_t *d;
|
|
int j;
|
|
ulong flags;
|
|
int drvidx;
|
|
|
|
if (dev->drivers >= ISDN_MAX_DRIVERS) {
|
|
printk(KERN_WARNING "register_isdn: Max. %d drivers supported\n",
|
|
ISDN_MAX_DRIVERS);
|
|
return 0;
|
|
}
|
|
if (!i->writebuf_skb) {
|
|
printk(KERN_WARNING "register_isdn: No write routine given.\n");
|
|
return 0;
|
|
}
|
|
if (!(d = kzalloc(sizeof(isdn_driver_t), GFP_KERNEL))) {
|
|
printk(KERN_WARNING "register_isdn: Could not alloc driver-struct\n");
|
|
return 0;
|
|
}
|
|
|
|
d->maxbufsize = i->maxbufsize;
|
|
d->pktcount = 0;
|
|
d->stavail = 0;
|
|
d->flags = DRV_FLAG_LOADED;
|
|
d->online = 0;
|
|
d->interface = i;
|
|
d->channels = 0;
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
|
|
if (!dev->drv[drvidx])
|
|
break;
|
|
if (isdn_add_channels(d, drvidx, i->channels, 0)) {
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
kfree(d);
|
|
return 0;
|
|
}
|
|
i->channels = drvidx;
|
|
i->rcvcallb_skb = isdn_receive_skb_callback;
|
|
i->statcallb = isdn_status_callback;
|
|
if (!strlen(i->id))
|
|
sprintf(i->id, "line%d", drvidx);
|
|
for (j = 0; j < drvidx; j++)
|
|
if (!strcmp(i->id, dev->drvid[j]))
|
|
sprintf(i->id, "line%d", drvidx);
|
|
dev->drv[drvidx] = d;
|
|
strcpy(dev->drvid[drvidx], i->id);
|
|
isdn_info_update();
|
|
dev->drivers++;
|
|
set_global_features();
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
*****************************************************************************
|
|
* And now the modules code.
|
|
*****************************************************************************
|
|
*/
|
|
|
|
static char *
|
|
isdn_getrev(const char *revision)
|
|
{
|
|
char *rev;
|
|
char *p;
|
|
|
|
if ((p = strchr(revision, ':'))) {
|
|
rev = p + 2;
|
|
p = strchr(rev, '$');
|
|
*--p = 0;
|
|
} else
|
|
rev = "???";
|
|
return rev;
|
|
}
|
|
|
|
/*
|
|
* Allocate and initialize all data, register modem-devices
|
|
*/
|
|
static int __init isdn_init(void)
|
|
{
|
|
int i;
|
|
char tmprev[50];
|
|
|
|
dev = vzalloc(sizeof(isdn_dev));
|
|
if (!dev) {
|
|
printk(KERN_WARNING "isdn: Could not allocate device-struct.\n");
|
|
return -EIO;
|
|
}
|
|
timer_setup(&dev->timer, isdn_timer_funct, 0);
|
|
spin_lock_init(&dev->lock);
|
|
spin_lock_init(&dev->timerlock);
|
|
#ifdef MODULE
|
|
dev->owner = THIS_MODULE;
|
|
#endif
|
|
mutex_init(&dev->mtx);
|
|
init_waitqueue_head(&dev->info_waitq);
|
|
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
|
|
dev->drvmap[i] = -1;
|
|
dev->chanmap[i] = -1;
|
|
dev->m_idx[i] = -1;
|
|
strcpy(dev->num[i], "???");
|
|
}
|
|
if (register_chrdev(ISDN_MAJOR, "isdn", &isdn_fops)) {
|
|
printk(KERN_WARNING "isdn: Could not register control devices\n");
|
|
vfree(dev);
|
|
return -EIO;
|
|
}
|
|
if ((isdn_tty_modem_init()) < 0) {
|
|
printk(KERN_WARNING "isdn: Could not register tty devices\n");
|
|
vfree(dev);
|
|
unregister_chrdev(ISDN_MAJOR, "isdn");
|
|
return -EIO;
|
|
}
|
|
#ifdef CONFIG_ISDN_PPP
|
|
if (isdn_ppp_init() < 0) {
|
|
printk(KERN_WARNING "isdn: Could not create PPP-device-structs\n");
|
|
isdn_tty_exit();
|
|
unregister_chrdev(ISDN_MAJOR, "isdn");
|
|
vfree(dev);
|
|
return -EIO;
|
|
}
|
|
#endif /* CONFIG_ISDN_PPP */
|
|
|
|
strcpy(tmprev, isdn_revision);
|
|
printk(KERN_NOTICE "ISDN subsystem Rev: %s/", isdn_getrev(tmprev));
|
|
strcpy(tmprev, isdn_net_revision);
|
|
printk("%s/", isdn_getrev(tmprev));
|
|
strcpy(tmprev, isdn_ppp_revision);
|
|
printk("%s/", isdn_getrev(tmprev));
|
|
strcpy(tmprev, isdn_audio_revision);
|
|
printk("%s/", isdn_getrev(tmprev));
|
|
strcpy(tmprev, isdn_v110_revision);
|
|
printk("%s", isdn_getrev(tmprev));
|
|
|
|
#ifdef MODULE
|
|
printk(" loaded\n");
|
|
#else
|
|
printk("\n");
|
|
#endif
|
|
isdn_info_update();
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Unload module
|
|
*/
|
|
static void __exit isdn_exit(void)
|
|
{
|
|
#ifdef CONFIG_ISDN_PPP
|
|
isdn_ppp_cleanup();
|
|
#endif
|
|
if (isdn_net_rmall() < 0) {
|
|
printk(KERN_WARNING "isdn: net-device busy, remove cancelled\n");
|
|
return;
|
|
}
|
|
isdn_tty_exit();
|
|
unregister_chrdev(ISDN_MAJOR, "isdn");
|
|
del_timer_sync(&dev->timer);
|
|
/* call vfree with interrupts enabled, else it will hang */
|
|
vfree(dev);
|
|
printk(KERN_NOTICE "ISDN-subsystem unloaded\n");
|
|
}
|
|
|
|
module_init(isdn_init);
|
|
module_exit(isdn_exit);
|