/* Linux ISDN subsystem, common used functions
*
* 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/config.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/version.h>
#include <linux/poll.h>
#include <linux/vmalloc.h>
#include <linux/isdn.h>
#include <linux/smp_lock.h>
#include <linux/ctype.h>
#include "isdn_common.h"
#include "isdn_net_lib.h"
#include "isdn_net.h"
#include "isdn_tty.h"
#include "isdn_ppp.h"
#ifdef CONFIG_ISDN_AUDIO
#include "isdn_audio.h"
#endif
#include <linux/isdn_divertif.h>
#include <linux/devfs_fs_kernel.h>
MODULE_DESCRIPTION("ISDN4Linux: link layer");
MODULE_AUTHOR("Fritz Elfert");
MODULE_LICENSE("GPL");
static isdn_dev_t *isdndev;
isdn_dev_t *
get_isdn_dev(void) {
return(isdndev);
}
/* Description of hardware-level-driver */
typedef struct isdn_driver {
int di;
char id[20];
atomic_t refcnt;
unsigned long flags; /* Misc driver Flags */
unsigned long features;
int channels; /* Number of channels */
wait_queue_head_t st_waitq; /* Wait-Queue for status-reads */
int maxbufsize; /* Maximum Buffersize supported*/
int stavail; /* Chars avail on Status-device*/
isdn_if *interface; /* Interface to driver */
char msn2eaz[10][ISDN_MSNLEN]; /* MSN->EAZ */
spinlock_t lock;
struct isdn_slot *slots;
struct fsm_inst fi;
} isdn_driver_t;
static spinlock_t drivers_lock = SPIN_LOCK_UNLOCKED;
static isdn_driver_t *drivers[ISDN_MAX_DRIVERS];
static void isdn_lock_driver(struct isdn_driver *drv);
static void isdn_unlock_driver(struct isdn_driver *drv);
/* ====================================================================== */
static void drv_destroy(struct isdn_driver *drv);
static inline struct isdn_driver *
get_drv(struct isdn_driver *drv)
{
printk("get_drv %d: %d -> %d\n", drv->di, atomic_read(&drv->refcnt),
atomic_read(&drv->refcnt) + 1);
atomic_inc(&drv->refcnt);
return drv;
}
static inline void
put_drv(struct isdn_driver *drv)
{
printk("put_drv %d: %d -> %d\n", drv->di, atomic_read(&drv->refcnt),
atomic_read(&drv->refcnt) - 1);
if (atomic_dec_and_test(&drv->refcnt)) {
drv_destroy(drv);
}
}
/* ====================================================================== */
static struct fsm slot_fsm;
static void slot_debug(struct fsm_inst *fi, char *fmt, ...);
static char *slot_st_str[] = {
"ST_SLOT_NULL",
"ST_SLOT_BOUND",
"ST_SLOT_IN",
"ST_SLOT_WAIT_DCONN",
"ST_SLOT_DCONN",
"ST_SLOT_WAIT_BCONN",
"ST_SLOT_ACTIVE",
"ST_SLOT_WAIT_BHUP",
"ST_SLOT_WAIT_DHUP",
};
static char *ev_str[] = {
"EV_DRV_REGISTER",
"EV_STAT_RUN",
"EV_STAT_STOP",
"EV_STAT_UNLOAD",
"EV_STAT_STAVAIL",
"EV_STAT_ADDCH",
"EV_STAT_ICALL",
"EV_STAT_DCONN",
"EV_STAT_BCONN",
"EV_STAT_BHUP",
"EV_STAT_DHUP",
"EV_STAT_BSENT",
"EV_STAT_CINF",
"EV_STAT_CAUSE",
"EV_STAT_DISPLAY",
"EV_STAT_FAXIND",
"EV_STAT_AUDIO",
"EV_CMD_CLREAZ",
"EV_CMD_SETEAZ",
"EV_CMD_SETL2",
"EV_CMD_SETL3",
"EV_CMD_DIAL",
"EV_CMD_ACCEPTD",
"EV_CMD_ACCEPTB",
"EV_CMD_HANGUP",
"EV_DATA_REQ",
"EV_DATA_IND",
"EV_SLOT_BIND",
"EV_SLOT_UNBIND",
};
static int __slot_command(struct isdn_slot *slot, isdn_ctrl *cmd);
static void isdn_v110_setl2(struct isdn_slot *slot, isdn_ctrl *cmd);
static void __isdn_v110_open(struct isdn_slot *slot);
static void __isdn_v110_close(struct isdn_slot *slot);
static void __isdn_v110_bsent(struct isdn_slot *slot, int pr, isdn_ctrl *cmd);
static int isdn_v110_data_ind(struct isdn_slot *slot, struct sk_buff *skb);
static int isdn_v110_data_req(struct isdn_slot *slot, struct sk_buff *skb);
static inline int
do_event_cb(struct isdn_slot *slot, int pr, void *arg)
{
if (slot->event_cb)
return slot->event_cb(slot, pr, arg);
return -ENXIO;
}
static int
slot_bind(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_slot *slot = fi->userdata;
isdn_lock_driver(slot->drv);
fsm_change_state(fi, ST_SLOT_BOUND);
return 0;
}
/* just pass through command */
static int
slot_command(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_slot *slot = fi->userdata;
isdn_ctrl *c = arg;
return __slot_command(slot, c);
}
/* just pass through status */
static int
slot_stat(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_slot *slot = fi->userdata;
do_event_cb(slot, pr, arg);
return 0;
}
/* just pass through command */
static int
slot_setl2(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_slot *slot = fi->userdata;
isdn_ctrl *c = arg;
isdn_v110_setl2(slot, c);
return __slot_command(slot, c);
}
static int
slot_dial(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_slot *slot = fi->userdata;
isdn_ctrl *ctrl = arg;
int retval;
retval = __slot_command(slot, ctrl);
if (retval >= 0)
fsm_change_state(fi, ST_SLOT_WAIT_DCONN);
return retval;
}
static int
slot_acceptd(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_slot *slot = fi->userdata;
isdn_ctrl *ctrl = arg;
int retval;
retval = __slot_command(slot, ctrl);
if (retval >= 0)
fsm_change_state(fi, ST_SLOT_WAIT_DCONN);
return retval;
}
static int
slot_acceptb(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_slot *slot = fi->userdata;
isdn_ctrl *ctrl = arg;
int retval;
retval = __slot_command(slot, ctrl);
if (retval >= 0)
fsm_change_state(fi, ST_SLOT_WAIT_BCONN);
return retval;
}
static int
slot_actv_hangup(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_slot *slot = fi->userdata;
isdn_ctrl *ctrl = arg;
int retval;
retval = __slot_command(slot, ctrl);
if (retval >= 0) {
fsm_change_state(fi, ST_SLOT_WAIT_BHUP);
}
return retval;
}
static int
slot_dconn(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_slot *slot = fi->userdata;
fsm_change_state(fi, ST_SLOT_DCONN);
do_event_cb(slot, pr, arg);
return 0;
}
static int
slot_bconn(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_slot *slot = fi->userdata;
fsm_change_state(fi, ST_SLOT_ACTIVE);
__isdn_v110_open(slot);
isdn_info_update();
do_event_cb(slot, pr, arg);
return 0;
}
static int
slot_bhup(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_slot *slot = fi->userdata;
__isdn_v110_close(slot);
fsm_change_state(fi, ST_SLOT_WAIT_DHUP);
do_event_cb(slot, pr, arg);
return 0;
}
static int
slot_dhup(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_slot *slot = fi->userdata;
fsm_change_state(fi, ST_SLOT_BOUND);
do_event_cb(slot, pr, arg);
return 0;
}
static int
slot_data_req(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_slot *slot = fi->userdata;
struct sk_buff *skb = arg;
return isdn_v110_data_req(slot, skb);
}
static int
slot_data_ind(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_slot *slot = fi->userdata;
struct sk_buff *skb = arg;
/* Update statistics */
slot->ibytes += skb->len;
return isdn_v110_data_ind(slot, skb);
}
static int
slot_bsent(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_slot *slot = fi->userdata;
isdn_ctrl *ctrl = arg;
__isdn_v110_bsent(slot, pr, ctrl);
return 0;
}
static int
slot_icall(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_slot *slot = fi->userdata;
isdn_ctrl *ctrl = arg;
int retval;
isdn_lock_driver(slot->drv);
fsm_change_state(fi, ST_SLOT_IN);
slot_debug(fi, "ICALL: %s\n", ctrl->parm.num);
if (isdndev->global_flags & ISDN_GLOBAL_STOPPED)
return 0;
strcpy(slot->num, ctrl->parm.setup.phone);
/* Try to find a network-interface which will accept incoming call */
retval = isdn_net_find_icall(slot, &ctrl->parm.setup);
/* already taken by net now? */
if (fi->state != ST_SLOT_IN)
goto out;
retval = isdn_tty_find_icall(slot, &ctrl->parm.setup);
out:
return 0;
}
/* should become broadcast later */
static int
slot_in_dhup(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_slot *slot = fi->userdata;
isdn_unlock_driver(slot->drv);
fsm_change_state(fi, ST_SLOT_NULL);
do_event_cb(slot, pr, arg);
return 0;
}
static int
slot_unbind(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_slot *slot = fi->userdata;
isdn_ctrl cmd;
isdn_unlock_driver(slot->drv);
fsm_change_state(fi, ST_SLOT_NULL);
strcpy(slot->num, "???");
cmd.parm.num[0] = '\0';
isdn_slot_command(slot, ISDN_CMD_SETEAZ, &cmd);
slot->ibytes = 0;
slot->obytes = 0;
slot->usage = ISDN_USAGE_NONE;
put_drv(slot->drv);
isdn_info_update();
return 0;
}
static struct fsm_node slot_fn_tbl[] = {
{ ST_SLOT_NULL, EV_SLOT_BIND, slot_bind },
{ ST_SLOT_NULL, EV_STAT_ICALL, slot_icall },
{ ST_SLOT_BOUND, EV_CMD_CLREAZ, slot_command },
{ ST_SLOT_BOUND, EV_CMD_SETEAZ, slot_command },
{ ST_SLOT_BOUND, EV_CMD_SETL2, slot_setl2 },
{ ST_SLOT_BOUND, EV_CMD_SETL3, slot_command },
{ ST_SLOT_BOUND, EV_CMD_DIAL, slot_dial },
{ ST_SLOT_BOUND, EV_SLOT_UNBIND, slot_unbind },
{ ST_SLOT_IN, EV_CMD_SETL2, slot_setl2 },
{ ST_SLOT_IN, EV_CMD_SETL3, slot_command },
{ ST_SLOT_IN, EV_CMD_ACCEPTD, slot_acceptd },
{ ST_SLOT_IN, EV_STAT_DHUP, slot_in_dhup },
{ ST_SLOT_WAIT_DCONN, EV_STAT_DCONN, slot_dconn },
{ ST_SLOT_WAIT_DCONN, EV_STAT_DHUP, slot_dhup },
{ ST_SLOT_DCONN, EV_CMD_ACCEPTB, slot_acceptb },
{ ST_SLOT_DCONN, EV_STAT_BCONN, slot_bconn },
{ ST_SLOT_WAIT_BCONN, EV_STAT_BCONN, slot_bconn },
{ ST_SLOT_ACTIVE, EV_DATA_REQ, slot_data_req },
{ ST_SLOT_ACTIVE, EV_DATA_IND, slot_data_ind },
{ ST_SLOT_ACTIVE, EV_CMD_HANGUP, slot_actv_hangup },
{ ST_SLOT_ACTIVE, EV_STAT_BSENT, slot_bsent },
{ ST_SLOT_ACTIVE, EV_STAT_BHUP, slot_bhup },
{ ST_SLOT_ACTIVE, EV_STAT_FAXIND, slot_stat },
{ ST_SLOT_ACTIVE, EV_STAT_AUDIO, slot_stat },
{ ST_SLOT_WAIT_BHUP, EV_STAT_BHUP, slot_bhup },
{ ST_SLOT_WAIT_DHUP, EV_STAT_DHUP, slot_dhup },
};
static struct fsm slot_fsm = {
.st_cnt = ARRAY_SIZE(slot_st_str),
.st_str = slot_st_str,
.ev_cnt = ARRAY_SIZE(ev_str),
.ev_str = ev_str,
.fn_cnt = ARRAY_SIZE(slot_fn_tbl),
.fn_tbl = slot_fn_tbl,
};
static void slot_debug(struct fsm_inst *fi, char *fmt, ...)
{
va_list args;
struct isdn_slot *slot = fi->userdata;
char buf[128];
char *p = buf;
va_start(args, fmt);
p += sprintf(p, "slot (%d:%d): ", slot->di, slot->ch);
p += vsprintf(p, fmt, args);
va_end(args);
printk(KERN_DEBUG "%s\n", buf);
}
/* ====================================================================== */
static spinlock_t stat_lock = SPIN_LOCK_UNLOCKED;
static struct fsm drv_fsm;
enum {
ST_DRV_NULL,
ST_DRV_LOADED,
ST_DRV_RUNNING,
};
static char *drv_st_str[] = {
"ST_DRV_NULL",
"ST_DRV_LOADED",
"ST_DRV_RUNNING",
};
#define DRV_FLAG_REJBUS 1
static int __drv_command(struct isdn_driver *drv, isdn_ctrl *cmd);
static int
isdn_writebuf_skb(struct isdn_slot *slot, struct sk_buff *skb)
{
struct sk_buff *skb2;
struct isdn_driver *drv = slot->drv;
int hl = drv->interface->hl_hdrlen;
int retval;
if (skb_headroom(skb) >= hl) {
retval = drv->interface->writebuf_skb(slot->di, slot->ch, 1, skb);
goto out;
}
skb2 = skb_realloc_headroom(skb, hl);
if (!skb2) {
retval = -ENOMEM;
goto out;
}
retval = drv->interface->writebuf_skb(slot->di, slot->ch, 1, skb2);
if (retval < 0)
kfree_skb(skb2);
else
kfree_skb(skb);
out:
if (retval > 0)
slot->obytes += retval;
return retval;
}
int
__isdn_drv_lookup(char *drvid)
{
int drvidx;
for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++) {
if (!drivers[drvidx])
continue;
if (strcmp(drivers[drvidx]->id, drvid) == 0)
return drvidx;
}
return -1;
}
int
isdn_drv_lookup(char *drvid)
{
unsigned long flags;
int drvidx;
spin_lock_irqsave(&drivers_lock, flags);
drvidx = __isdn_drv_lookup(drvid);
spin_unlock_irqrestore(&drivers_lock, flags);
return drvidx;
}
static void
drv_destroy(struct isdn_driver *drv)
{
kfree(drv->slots);
kfree(drv);
}
static struct isdn_driver *
get_drv_by_nr(int di)
{
unsigned long flags;
struct isdn_driver *drv;
BUG_ON(di < 0 || di >= ISDN_MAX_DRIVERS);
spin_lock_irqsave(&drivers_lock, flags);
drv = drivers[di];
if (drv)
get_drv(drv);
spin_unlock_irqrestore(&drivers_lock, flags);
return drv;
}
char *
isdn_drv_drvid(int di)
{
if (!drivers[di]) {
isdn_BUG();
return "";
}
return drivers[di]->id;
}
/*
* Helper keeping track of the features the drivers support
*/
static void
set_global_features(void)
{
unsigned long flags;
int drvidx;
isdndev->global_features = 0;
spin_lock_irqsave(&drivers_lock, flags);
for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++) {
if (!drivers[drvidx])
continue;
if (drivers[drvidx]->fi.state != ST_DRV_RUNNING)
continue;
isdndev->global_features |= drivers[drvidx]->features;
}
spin_unlock_irqrestore(&drivers_lock, flags);
}
/*
* driver state machine
*/
static int isdn_add_channels(struct isdn_driver *, int);
static void isdn_receive_skb_callback(int di, int ch, struct sk_buff *skb);
static int isdn_status_callback(isdn_ctrl * c);
static void isdn_v110_add_features(struct isdn_driver *drv);
static int
drv_register(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_driver *drv = fi->userdata;
isdn_if *iif = arg;
fsm_change_state(fi, ST_DRV_LOADED);
drv->maxbufsize = iif->maxbufsize;
drv->interface = iif;
iif->channels = drv->di;
iif->rcvcallb_skb = isdn_receive_skb_callback;
iif->statcallb = isdn_status_callback;
isdn_info_update();
return(0);
}
static int
drv_stat_run(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_driver *drv = fi->userdata;
fsm_change_state(fi, ST_DRV_RUNNING);
drv->features = drv->interface->features;
isdn_v110_add_features(drv);
set_global_features();
return(0);
}
static int
drv_stat_stop(struct fsm_inst *fi, int pr, void *arg)
{
fsm_change_state(fi, ST_DRV_LOADED);
set_global_features();
return(0);
}
static int
drv_stat_unload(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_driver *drv = fi->userdata;
unsigned long flags;
spin_lock_irqsave(&drivers_lock, flags);
drivers[drv->di] = NULL;
spin_unlock_irqrestore(&drivers_lock, flags);
put_drv(drv);
isdndev->channels -= drv->channels;
isdn_info_update();
return 0;
}
static int
drv_stat_stavail(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_driver *drv = fi->userdata;
unsigned long flags;
isdn_ctrl *c = arg;
spin_lock_irqsave(&stat_lock, flags);
drv->stavail += c->arg;
spin_unlock_irqrestore(&stat_lock, flags);
wake_up_interruptible(&drv->st_waitq);
return 0;
}
static int
drv_to_slot(struct fsm_inst *fi, int pr, void *arg)
{
struct isdn_driver *drv = fi->userdata;
isdn_ctrl *c = arg;
int ch = c->arg & 0xff;
return fsm_event(&drv->slots[ch].fi, pr, arg);
}
static struct fsm_node drv_fn_tbl[] = {
{ ST_DRV_NULL, EV_DRV_REGISTER, drv_register },
{ ST_DRV_LOADED, EV_STAT_RUN, drv_stat_run },
{ ST_DRV_LOADED, EV_STAT_STAVAIL, drv_stat_stavail },
{ ST_DRV_LOADED, EV_STAT_UNLOAD, drv_stat_unload },
{ ST_DRV_RUNNING, EV_STAT_STOP, drv_stat_stop },
{ ST_DRV_RUNNING, EV_STAT_STAVAIL, drv_stat_stavail },
{ ST_DRV_RUNNING, EV_STAT_ICALL, drv_to_slot },
{ ST_DRV_RUNNING, EV_STAT_DCONN, drv_to_slot },
{ ST_DRV_RUNNING, EV_STAT_BCONN, drv_to_slot },
{ ST_DRV_RUNNING, EV_STAT_BHUP, drv_to_slot },
{ ST_DRV_RUNNING, EV_STAT_DHUP, drv_to_slot },
{ ST_DRV_RUNNING, EV_STAT_BSENT, drv_to_slot },
{ ST_DRV_RUNNING, EV_STAT_CINF, drv_to_slot },
{ ST_DRV_RUNNING, EV_STAT_CAUSE, drv_to_slot },
{ ST_DRV_RUNNING, EV_STAT_DISPLAY, drv_to_slot },
{ ST_DRV_RUNNING, EV_STAT_FAXIND, drv_to_slot },
{ ST_DRV_RUNNING, EV_STAT_AUDIO, drv_to_slot },
};
static struct fsm drv_fsm = {
.st_cnt = ARRAY_SIZE(drv_st_str),
.st_str = drv_st_str,
.ev_cnt = ARRAY_SIZE(ev_str),
.ev_str = ev_str,
.fn_cnt = ARRAY_SIZE(drv_fn_tbl),
.fn_tbl = drv_fn_tbl,
};
static void drv_debug(struct fsm_inst *fi, char *fmt, ...)
{
va_list args;
struct isdn_driver *drv = fi->userdata;
char buf[128];
char *p = buf;
va_start(args, fmt);
p += sprintf(p, "%s: ", drv->id);
p += vsprintf(p, fmt, args);
va_end(args);
printk(KERN_DEBUG "%s\n", buf);
}
/* ====================================================================== */
/* callbacks from hardware driver */
/* ====================================================================== */
/* Receive a packet from B-Channel. */
static void
isdn_receive_skb_callback(int di, int ch, struct sk_buff *skb)
{
struct isdn_driver *drv;
drv = get_drv_by_nr(di);
if (!drv) {
/* hardware driver is buggy - driver isn't registered */
isdn_BUG();
goto out;
}
/* we short-cut here instead of going through the driver fsm */
if (drv->fi.state != ST_DRV_RUNNING) {
/* hardware driver is buggy - driver isn't running */
isdn_BUG();
goto out;
}
if (fsm_event(&drv->slots[ch].fi, EV_DATA_IND, skb))
dev_kfree_skb(skb);
out:
put_drv(drv);
}
/* Receive status indications */
static int
isdn_status_callback(isdn_ctrl *c)
{
struct isdn_driver *drv;
int rc;
drv = get_drv_by_nr(c->driver);
if (!drv) {
/* hardware driver is buggy - driver isn't registered */
isdn_BUG();
return 1;
}
switch (c->command) {
case ISDN_STAT_STAVAIL:
rc = fsm_event(&drv->fi, EV_STAT_STAVAIL, c);
break;
case ISDN_STAT_RUN:
rc = fsm_event(&drv->fi, EV_STAT_RUN, c);
break;
case ISDN_STAT_STOP:
rc = fsm_event(&drv->fi, EV_STAT_STOP, c);
break;
case ISDN_STAT_UNLOAD:
rc = fsm_event(&drv->fi, EV_STAT_UNLOAD, c);
break;
case ISDN_STAT_ADDCH:
rc = fsm_event(&drv->fi, EV_STAT_ADDCH, c);
break;
case ISDN_STAT_ICALL:
rc = fsm_event(&drv->fi, EV_STAT_ICALL, c);
break;
case ISDN_STAT_DCONN:
rc = fsm_event(&drv->fi, EV_STAT_DCONN, c);
break;
case ISDN_STAT_BCONN:
rc = fsm_event(&drv->fi, EV_STAT_BCONN, c);
break;
case ISDN_STAT_BHUP:
rc = fsm_event(&drv->fi, EV_STAT_BHUP, c);
break;
case ISDN_STAT_DHUP:
rc = fsm_event(&drv->fi, EV_STAT_DHUP, c);
break;
case ISDN_STAT_BSENT:
rc = fsm_event(&drv->fi, EV_STAT_BSENT, c);
break;
case ISDN_STAT_CINF:
rc = fsm_event(&drv->fi, EV_STAT_CINF, c);
break;
case ISDN_STAT_CAUSE:
rc = fsm_event(&drv->fi, EV_STAT_CAUSE, c);
break;
case ISDN_STAT_DISPLAY:
rc = fsm_event(&drv->fi, EV_STAT_DISPLAY, c);
break;
case ISDN_STAT_FAXIND:
rc = fsm_event(&drv->fi, EV_STAT_FAXIND, c);
break;
case ISDN_STAT_AUDIO:
rc = fsm_event(&drv->fi, EV_STAT_AUDIO, c);
break;
#warning FIXME divert interface
#if 0
case ISDN_STAT_ICALL:
/* 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;
switch (r) {
case 0:
if (divert_if)
if ((retval = divert_if->stat_callback(c)))
return(retval); /* processed */
if ((!retval) && (drivers[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: /* incoming call accepted by net interface */
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. */
break;
case 5:
/* Number would eventually match, if longer */
retval = 3;
break;
}
dbg_statcallb("ICALL: ret=%d\n", retval);
return retval;
break;
case ISDN_STAT_DHUP:
if (divert_if)
divert_if->stat_callback(c);
break;
case ISDN_STAT_DISCH:
save_flags(flags);
cli();
for (i = 0; i < ISDN_MAX_CHANNELS; i++)
if ((slots[i].di == di) &&
(slots[i].ch == c->arg)) {
if (c->parm.num[0])
slots[i].usage &= ~ISDN_USAGE_DISABLED;
else if (USG_NONE(isdn_slot_usage(i)))
slots[i].usage |= ISDN_USAGE_DISABLED;
else
retval = -1;
break;
}
restore_flags(flags);
break;
case CAPI_PUT_MESSAGE:
return(isdn_capi_rec_hl_msg(&c->parm.cmsg));
case ISDN_STAT_PROT:
case ISDN_STAT_REDIR:
if (divert_if)
return(divert_if->stat_callback(c));
#endif
default:
rc = 1;
}
put_drv(drv);
return rc;
}
/* ====================================================================== */
/*
* Register a new ISDN interface
*/
int
register_isdn(isdn_if *iif)
{
struct isdn_driver *drv;
unsigned long flags;
int drvidx;
drv = kmalloc(sizeof(*drv), GFP_ATOMIC);
if (!drv) {
printk(KERN_WARNING "register_isdn: out of mem\n");
goto fail;
}
memset(drv, 0, sizeof(*drv));
atomic_set(&drv->refcnt, 0);
spin_lock_init(&drv->lock);
init_waitqueue_head(&drv->st_waitq);
drv->fi.fsm = &drv_fsm;
drv->fi.state = ST_DRV_NULL;
drv->fi.debug = 1;
drv->fi.userdata = drv;
drv->fi.printdebug = drv_debug;
spin_lock_irqsave(&drivers_lock, flags);
for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
if (!drivers[drvidx])
break;
if (drvidx == ISDN_MAX_DRIVERS)
goto fail_unlock;
if (!strlen(iif->id))
sprintf(iif->id, "line%d", drvidx);
if (__isdn_drv_lookup(iif->id) >= 0)
goto fail_unlock;
strcpy(drv->id, iif->id);
if (isdn_add_channels(drv, iif->channels))
goto fail_unlock;
drv->di = drvidx;
drivers[drvidx] = get_drv(drv);
spin_unlock_irqrestore(&drivers_lock, flags);
fsm_event(&drv->fi, EV_DRV_REGISTER, iif);
return 1;
fail_unlock:
spin_unlock_irqrestore(&drivers_lock, flags);
kfree(drv);
fail:
return 0;
}
/* ====================================================================== */
#if defined(CONFIG_ISDN_DIVERSION) || defined(CONFIG_ISDN_DIVERSION_MODULE)
static isdn_divert_if *divert_if; /* = NULL */
#else
#define divert_if ((isdn_divert_if *) NULL)
#endif
static int isdn_wildmat(char *s, char *p);
static void
isdn_lock_driver(struct isdn_driver *drv)
{
// FIXME don't ignore return value
try_module_get(drv->interface->owner);
}
static void
isdn_unlock_driver(struct isdn_driver *drv)
{
module_put(drv->interface->owner);
}
#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,
* fall through.
*/
p++;
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 );
}
static int
__drv_command(struct isdn_driver *drv, isdn_ctrl *c)
{
#ifdef ISDN_DEBUG_COMMAND
switch (c->command) {
case ISDN_CMD_SETL2:
printk(KERN_DEBUG "ISDN_CMD_SETL2 %d/%ld\n", c->driver, c->arg & 0xff); break;
case ISDN_CMD_SETL3:
printk(KERN_DEBUG "ISDN_CMD_SETL3 %d/%ld\n", c->driver, c->arg & 0xff); break;
case ISDN_CMD_DIAL:
printk(KERN_DEBUG "ISDN_CMD_DIAL %d/%ld\n", c->driver, c->arg & 0xff); break;
case ISDN_CMD_ACCEPTD:
printk(KERN_DEBUG "ISDN_CMD_ACCEPTD %d/%ld\n", c->driver, c->arg & 0xff); break;
case ISDN_CMD_ACCEPTB:
printk(KERN_DEBUG "ISDN_CMD_ACCEPTB %d/%ld\n", c->driver, c->arg & 0xff); break;
case ISDN_CMD_HANGUP:
printk(KERN_DEBUG "ISDN_CMD_HANGUP %d/%ld\n", c->driver, c->arg & 0xff); break;
case ISDN_CMD_CLREAZ:
printk(KERN_DEBUG "ISDN_CMD_CLREAZ %d/%ld\n", c->driver, c->arg & 0xff); break;
case ISDN_CMD_SETEAZ:
printk(KERN_DEBUG "ISDN_CMD_SETEAZ %d/%ld\n", c->driver, c->arg & 0xff); break;
default:
printk(KERN_DEBUG "%s: cmd = %d\n", __FUNCTION__, c->command);
}
#endif
return drv->interface->command(c);
}
static int
__slot_command(struct isdn_slot *slot, isdn_ctrl *cmd)
{
struct isdn_driver *drv = slot->drv;
return __drv_command(drv, 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>
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;
}
}
/*
* 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;
}
static struct isdn_slot *
get_slot_by_minor(int minor)
{
int di, ch;
struct isdn_driver *drv;
for (di = 0; di < ISDN_MAX_DRIVERS; di++) {
drv = get_drv_by_nr(di);
if (!drv)
continue;
for (ch = 0; ch < drv->channels; ch++) {
if (minor-- == 0)
goto found;
}
put_drv(drv);
}
return NULL;
found:
return drv->slots + ch;
}
static inline void
put_slot(struct isdn_slot *slot)
{
put_drv(slot->drv);
}
static char *
isdn_statstr(void)
{
static char istatbuf[2048];
struct isdn_slot *slot;
char *p;
int i;
sprintf(istatbuf, "idmap:\t");
p = istatbuf + strlen(istatbuf);
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
slot = get_slot_by_minor(i);
if (slot) {
sprintf(p, "%s ", slot->drv->id);
put_slot(slot);
} else {
sprintf(p, "- ");
}
p = istatbuf + strlen(istatbuf);
}
sprintf(p, "\nchmap:\t");
p = istatbuf + strlen(istatbuf);
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
slot = get_slot_by_minor(i);
if (slot) {
sprintf(p, "%d ", slot->ch);
put_slot(slot);
} else {
sprintf(p, "-1 ");
}
p = istatbuf + strlen(istatbuf);
}
sprintf(p, "\ndrmap:\t");
p = istatbuf + strlen(istatbuf);
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
slot = get_slot_by_minor(i);
if (slot) {
sprintf(p, "%d ", slot->di);
put_slot(slot);
} else {
sprintf(p, "-1 ");
}
}
sprintf(p, "\nusage:\t");
p = istatbuf + strlen(istatbuf);
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
slot = get_slot_by_minor(i);
if (slot) {
sprintf(p, "%d ", slot->usage);
put_slot(slot);
} else {
sprintf(p, "0 ");
}
p = istatbuf + strlen(istatbuf);
}
sprintf(p, "\nflags:\t");
p = istatbuf + strlen(istatbuf);
for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
slot = get_slot_by_minor(i);
if (slot) {
sprintf(p, "0 ");
put_slot(slot);
} else {
sprintf(p, "? ");
}
p = istatbuf + strlen(istatbuf);
}
sprintf(p, "\nphone:\t");
p = istatbuf + strlen(istatbuf);
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
slot = get_slot_by_minor(i);
if (slot) {
sprintf(p, "%s ", slot->num);
put_slot(slot);
} else {
sprintf(p, " ");
}
p = istatbuf + strlen(istatbuf);
}
sprintf(p, "\n");
return istatbuf;
}
/*
* /dev/isdninfo
*/
void
isdn_info_update(void)
{
infostruct *p = isdndev->infochain;
while (p) {
*(p->private) = 1;
p = (infostruct *) p->next;
}
wake_up_interruptible(&(isdndev->info_waitq));
}
static int
isdn_status_open(struct inode *ino, struct file *filep)
{
infostruct *p;
p = kmalloc(sizeof(infostruct), GFP_KERNEL);
if (!p)
return -ENOMEM;
p->next = (char *) isdndev->infochain;
p->private = (char *) &(filep->private_data);
isdndev->infochain = p;
/* At opening we allow a single update */
filep->private_data = (char *) 1;
return 0;
}
static int
isdn_status_release(struct inode *ino, struct file *filep)
{
infostruct *p = isdndev->infochain;
infostruct *q = NULL;
lock_kernel();
while (p) {
if (p->private == (char *) &(filep->private_data)) {
if (q)
q->next = p->next;
else
isdndev->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");
out:
unlock_kernel();
return 0;
}
static ssize_t
isdn_status_read(struct file *file, char *buf, size_t count, loff_t * off)
{
int retval;
size_t len = 0;
char *p;
if (off != &file->f_pos)
return -ESPIPE;
if (!file->private_data) {
if (file->f_flags & O_NONBLOCK)
return -EAGAIN;
interruptible_sleep_on(&(isdndev->info_waitq));
}
lock_kernel();
p = isdn_statstr();
file->private_data = 0;
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;
out:
unlock_kernel();
return retval;
}
static ssize_t
isdn_status_write(struct file *file, const char *buf, size_t count, loff_t *off)
{
return -EPERM;
}
static unsigned int
isdn_status_poll(struct file *file, poll_table *wait)
{
unsigned int mask = 0;
poll_wait(file, &(isdndev->info_waitq), wait);
lock_kernel();
if (file->private_data)
mask |= POLLIN | POLLRDNORM;
unlock_kernel();
return mask;
}
static int
isdn_status_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg)
{
static unsigned long zero_ul = 0UL;
int ret;
struct isdn_slot *slot;
switch (cmd) {
case IIOCGETDVR:
return (TTY_DV +
(NET_DV << 8) +
(INF_DV << 16));
case IIOCGETCPS:
if (arg) {
ulong *p = (ulong *) arg;
int i;
if ((ret = verify_area(VERIFY_WRITE, (void *) arg,
sizeof(ulong) * ISDN_MAX_CHANNELS * 2)))
return ret;
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
slot = get_slot_by_minor(i);
if (slot) {
put_user(slot->ibytes, p++);
put_user(slot->obytes, p++);
put_slot(slot);
} else {
put_user(zero_ul, p++);
put_user(zero_ul, p++);
}
}
return 0;
} else
return -EINVAL;
break;
case IIOCNETGPN:
return isdn_net_ioctl(inode, file, cmd, arg);
default:
return -EINVAL;
}
}
static struct file_operations isdn_status_fops =
{
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = isdn_status_read,
.write = isdn_status_write,
.poll = isdn_status_poll,
.ioctl = isdn_status_ioctl,
.open = isdn_status_open,
.release = isdn_status_release,
};
/*
* /dev/isdnctrlX
*/
static int
isdn_ctrl_open(struct inode *ino, struct file *file)
{
unsigned int minor = iminor(ino);
struct isdn_slot *slot = get_slot_by_minor(minor - ISDN_MINOR_CTRL);
if (!slot)
return -ENODEV;
isdn_lock_driver(slot->drv);
file->private_data = slot;
return 0;
}
static int
isdn_ctrl_release(struct inode *ino, struct file *file)
{
struct isdn_slot *slot = file->private_data;
if (isdndev->profd == current)
isdndev->profd = NULL;
isdn_unlock_driver(slot->drv);
put_slot(slot);
return 0;
}
static ssize_t
isdn_ctrl_read(struct file *file, char *buf, size_t count, loff_t * off)
{
struct isdn_slot *slot = file->private_data;
DECLARE_WAITQUEUE(wait, current);
unsigned long flags;
size_t len = 0;
if (off != &file->f_pos)
return -ESPIPE;
if (!slot->drv->interface->readstat) {
isdn_BUG();
return 0;
}
add_wait_queue(&slot->drv->st_waitq, &wait);
for (;;) {
spin_lock_irqsave(&stat_lock, flags);
len = slot->drv->stavail;
spin_unlock_irqrestore(&stat_lock, flags);
if (len > 0)
break;
if (signal_pending(current)) {
len = -ERESTARTSYS;
break;
}
if (file->f_flags & O_NONBLOCK) {
len = -EAGAIN;
break;
}
schedule();
}
__set_current_state(TASK_RUNNING);
remove_wait_queue(&slot->drv->st_waitq, &wait);
if (len < 0)
return len;
if (count > len)
count = len;
len = slot->drv->interface->readstat(buf, count, 1, slot->di,
slot->ch);
spin_lock_irqsave(&stat_lock, flags);
if (len) {
slot->drv->stavail -= len;
} else {
isdn_BUG();
slot->drv->stavail = 0;
}
spin_unlock_irqrestore(&stat_lock, flags);
*off += len;
return len;
}
static ssize_t
isdn_ctrl_write(struct file *file, const char *buf, size_t count, loff_t *off)
{
struct isdn_slot *slot = file->private_data;
int retval;
if (off != &file->f_pos) {
retval = -ESPIPE;
goto out;
}
if (!slot->drv->interface->writecmd) {
retval = -EINVAL;
goto out;
}
retval = slot->drv->interface->writecmd(buf, count, 1, slot->di,
slot->ch);
out:
return retval;
}
static unsigned int
isdn_ctrl_poll(struct file *file, poll_table *wait)
{
struct isdn_slot *slot = file->private_data;
unsigned int mask = 0;
poll_wait(file, &slot->drv->st_waitq, wait);
mask = POLLOUT | POLLWRNORM;
if (slot->drv->stavail)
mask |= POLLIN | POLLRDNORM;
return mask;
}
static int
isdn_ctrl_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg)
{
isdn_ctrl c;
int drvidx;
int ret;
int i;
char *p;
/* save stack space */
union {
char bname[20];
isdn_ioctl_struct iocts;
} iocpar;
#define iocts iocpar.iocts
#define bname iocpar.bname
/*
* 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. Therefor, ioctl's
* manipulating the lists and ioctl's sleeping while accessing the lists
* are serialized by means of a semaphore.
*/
switch (cmd) {
case IIOCNETAIF:
case IIOCNETASL:
case IIOCNETDIF:
case IIOCNETSCF:
case IIOCNETGCF:
case IIOCNETANM:
case IIOCNETGNM:
case IIOCNETDNM:
case IIOCNETDIL:
case IIOCNETALN:
case IIOCNETDLN:
case IIOCNETHUP:
return isdn_net_ioctl(inode, file, cmd, arg);
case IIOCSETVER:
isdndev->net_verbose = arg;
printk(KERN_INFO "isdn: Verbose-Level is %d\n", isdndev->net_verbose);
return 0;
case IIOCSETGST:
if (arg) {
isdndev->global_flags |= ISDN_GLOBAL_STOPPED;
isdn_net_hangup_all();
} else {
isdndev->global_flags &= ~ISDN_GLOBAL_STOPPED;
}
return 0;
case IIOCSETBRJ:
drvidx = -1;
if (arg) {
char *p;
if (copy_from_user((char *) &iocts, (char *) arg,
sizeof(isdn_ioctl_struct)))
return -EFAULT;
if (strlen(iocts.drvid)) {
if ((p = strchr(iocts.drvid, ',')))
*p = 0;
drvidx = isdn_drv_lookup(iocts.drvid);
}
}
if (drvidx == -1)
return -ENODEV;
if (iocts.arg)
drivers[drvidx]->flags |= DRV_FLAG_REJBUS;
else
drivers[drvidx]->flags &= ~DRV_FLAG_REJBUS;
return 0;
case IIOCSIGPRF:
isdndev->profd = current;
return 0;
break;
case IIOCGETPRF:
/* Get all Modem-Profiles */
if (arg) {
char *p = (char *) arg;
int i;
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
if (copy_to_user(p, isdn_mdm.info[i].emu.profile,
ISDN_MODEM_NUMREG))
return -EFAULT;
p += ISDN_MODEM_NUMREG;
if (copy_to_user(p, isdn_mdm.info[i].emu.pmsn, ISDN_MSNLEN))
return -EFAULT;
p += ISDN_MSNLEN;
if (copy_to_user(p, isdn_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 *p = (char *) arg;
int i;
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
if (copy_from_user(isdn_mdm.info[i].emu.profile, p,
ISDN_MODEM_NUMREG))
return -EFAULT;
p += ISDN_MODEM_NUMREG;
if (copy_from_user(isdn_mdm.info[i].emu.plmsn, p, ISDN_LMSNLEN))
return -EFAULT;
p += ISDN_LMSNLEN;
if (copy_from_user(isdn_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((char *) &iocts,
(char *) arg,
sizeof(isdn_ioctl_struct)))
return -EFAULT;
drvidx = isdn_drv_lookup(iocts.drvid);
if (drvidx == -1)
return -ENODEV;
if (cmd == IIOCSETMAP) {
int loop = 1;
p = (char *) iocts.arg;
i = 0;
while (loop) {
int j = 0;
while (1) {
if ((ret = get_user(bname[j], p++)))
return ret;
switch (bname[j]) {
case '\0':
loop = 0;
/* Fall through */
case ',':
bname[j] = '\0';
strcpy(drivers[drvidx]->msn2eaz[i], bname);
j = ISDN_MSNLEN;
break;
default:
j++;
}
if (j >= ISDN_MSNLEN)
break;
}
if (++i > 9)
break;
}
} else {
p = (char *) iocts.arg;
for (i = 0; i < 10; i++) {
sprintf(bname, "%s%s",
strlen(drivers[drvidx]->msn2eaz[i]) ?
drivers[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:
if (arg) {
if (copy_to_user((char *) arg, (char *) &isdndev, sizeof(ulong)))
return -EFAULT;
return 0;
} else
return -EINVAL;
break;
default:
if ((cmd & IIOCDRVCTL) == IIOCDRVCTL)
cmd = ((cmd >> _IOC_NRSHIFT) & _IOC_NRMASK) & ISDN_DRVIOCTL_MASK;
else
return -EINVAL;
if (arg) {
if (copy_from_user((char *) &iocts, (char *) arg, sizeof(isdn_ioctl_struct)))
return -EFAULT;
drvidx = isdn_drv_lookup(iocts.drvid);
if (drvidx == -1)
return -ENODEV;
if ((ret = verify_area(VERIFY_WRITE, (void *) arg,
sizeof(isdn_ioctl_struct))))
return ret;
c.driver = drvidx;
c.command = ISDN_CMD_IOCTL;
c.arg = cmd;
memcpy(c.parm.num, (char *) &iocts.arg, sizeof(ulong));
ret = __drv_command(drivers[drvidx], &c);
memcpy((char *) &iocts.arg, c.parm.num, sizeof(ulong));
if (copy_to_user((char *) arg, &iocts, sizeof(isdn_ioctl_struct)))
return -EFAULT;
return ret;
} else
return -EINVAL;
}
#undef iocts
#undef bname
}
static struct file_operations isdn_ctrl_fops =
{
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = isdn_ctrl_read,
.write = isdn_ctrl_write,
.poll = isdn_ctrl_poll,
.ioctl = isdn_ctrl_ioctl,
.open = isdn_ctrl_open,
.release = isdn_ctrl_release,
};
/*
* file_operations for major 45, /dev/isdn*
* stolen from drivers/char/misc.c
*/
static int
isdn_open(struct inode * inode, struct file * file)
{
int minor = iminor(inode);
int err = -ENODEV;
struct file_operations *old_fops, *new_fops = NULL;
if (minor >= ISDN_MINOR_CTRL && minor <= ISDN_MINOR_CTRLMAX)
new_fops = fops_get(&isdn_ctrl_fops);
#ifdef CONFIG_ISDN_PPP
else if (minor >= ISDN_MINOR_PPP && minor <= ISDN_MINOR_PPPMAX)
new_fops = fops_get(&isdn_ppp_fops);
#endif
else if (minor == ISDN_MINOR_STATUS)
new_fops = fops_get(&isdn_status_fops);
if (!new_fops)
goto out;
err = 0;
old_fops = file->f_op;
file->f_op = new_fops;
if (file->f_op->open) {
err = file->f_op->open(inode,file);
if (err) {
fops_put(file->f_op);
file->f_op = fops_get(old_fops);
}
}
fops_put(old_fops);
out:
return err;
}
static struct file_operations isdn_fops =
{
.owner = THIS_MODULE,
.open = isdn_open,
};
char *
isdn_map_eaz2msn(char *msn, int di)
{
struct isdn_driver *this = drivers[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.
*/
struct isdn_slot *
isdn_get_free_slot(int usage, int l2_proto, int l3_proto,
int pre_dev, int pre_chan, char *msn)
{
struct isdn_driver *drv;
struct isdn_slot *slot;
int di, ch;
unsigned long flags;
unsigned long features;
features = ((1 << l2_proto) | (0x10000 << l3_proto));
for (di = 0; di < ISDN_MAX_DRIVERS; di++) {
if (pre_dev >= 0 && pre_dev != di)
continue;
drv = get_drv_by_nr(di);
if (!drv)
continue;
if (drv->fi.state != ST_DRV_RUNNING)
goto put;
if ((drv->features & features) != features)
goto put;
spin_lock_irqsave(&drv->lock, flags);
for (ch = 0; ch < drv->channels; ch++) {
if (pre_chan >= 0 && pre_chan != ch)
continue;
slot = &drv->slots[ch];
if (!USG_NONE(slot->usage))
continue;
if (slot->usage & ISDN_USAGE_DISABLED)
continue;
if (strcmp(isdn_map_eaz2msn(msn, drv->di), "-") == 0)
continue;
goto found;
}
spin_unlock_irqrestore(&drv->lock, flags);
put:
put_drv(drv);
}
return NULL;
found:
slot->usage = usage;
spin_unlock_irqrestore(&drv->lock, flags);
isdn_info_update();
fsm_event(&slot->fi, EV_SLOT_BIND, NULL);
return slot;
}
/*
* Set state of ISDN-channel to 'unused'
*/
void
isdn_slot_free(struct isdn_slot *slot)
{
fsm_event(&slot->fi, EV_SLOT_UNBIND, NULL);
}
/*
* Return: length of data on success, -ERRcode on failure.
*/
int
isdn_slot_write(struct isdn_slot *slot, struct sk_buff *skb)
{
return fsm_event(&slot->fi, EV_DATA_REQ, skb);
}
static int
isdn_add_channels(struct isdn_driver *drv, int n)
{
struct isdn_slot *slot;
int ch;
if (n < 1)
return 0;
if (isdndev->channels + n > ISDN_MAX_CHANNELS) {
printk(KERN_WARNING "register_isdn: Max. %d channels supported\n",
ISDN_MAX_CHANNELS);
return -EBUSY;
}
isdndev->channels += n;
drv->slots = kmalloc(sizeof(struct isdn_slot) * n, GFP_ATOMIC);
if (!drv->slots)
return -ENOMEM;
memset(drv->slots, 0, sizeof(struct isdn_slot) * n);
for (ch = 0; ch < n; ch++) {
slot = drv->slots + ch;
slot->ch = ch;
slot->di = drv->di;
slot->drv = drv;
strcpy(slot->num, "???");
slot->fi.fsm = &slot_fsm;
slot->fi.state = ST_SLOT_NULL;
slot->fi.debug = 1;
slot->fi.userdata = slot;
slot->fi.printdebug = slot_debug;
}
drv->channels = n;
return 0;
}
/*
* Low-level-driver registration
*/
#if defined(CONFIG_ISDN_DIVERSION) || defined(CONFIG_ISDN_DIVERSION_MODULE)
/*
* map_drvname
*/
static char *map_drvname(int di)
{
if ((di < 0) || (di >= ISDN_MAX_DRIVERS))
return(NULL);
return(isdndev->drvid[di]); /* driver name */
}
/*
* map_namedrv
*/
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);
}
/*
* DIVERT_REG_NAME
*/
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 */
MOD_DEC_USE_COUNT;
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;
MOD_INC_USE_COUNT;
divert_if = i_div; /* remember interface */
return(DIVERT_NO_ERR);
default:
return(DIVERT_CMD_ERR);
}
}
EXPORT_SYMBOL(DIVERT_REG_NAME);
#endif
EXPORT_SYMBOL(register_isdn);
#ifdef CONFIG_ISDN_PPP
EXPORT_SYMBOL(isdn_ppp_register_compressor);
EXPORT_SYMBOL(isdn_ppp_unregister_compressor);
#endif
int
isdn_slot_maxbufsize(struct isdn_slot *slot)
{
return slot->drv->maxbufsize;
}
int
isdn_slot_hdrlen(struct isdn_slot *slot)
{
return slot->drv->interface->hl_hdrlen;
}
char *
isdn_slot_map_eaz2msn(struct isdn_slot *slot, char *msn)
{
return isdn_map_eaz2msn(msn, slot->di);
}
int
isdn_slot_command(struct isdn_slot *slot, int cmd, isdn_ctrl *ctrl)
{
ctrl->command = cmd;
ctrl->driver = slot->di;
switch (cmd) {
case ISDN_CMD_SETL2:
case ISDN_CMD_SETL3:
case ISDN_CMD_PROT_IO:
ctrl->arg &= ~0xff; ctrl->arg |= slot->ch;
break;
case ISDN_CMD_DIAL:
if (isdndev->global_flags & ISDN_GLOBAL_STOPPED)
return -EBUSY;
/* fall through */
default:
ctrl->arg = slot->ch;
break;
}
switch (cmd) {
case ISDN_CMD_CLREAZ:
return fsm_event(&slot->fi, EV_CMD_CLREAZ, ctrl);
case ISDN_CMD_SETEAZ:
return fsm_event(&slot->fi, EV_CMD_SETEAZ, ctrl);
case ISDN_CMD_SETL2:
return fsm_event(&slot->fi, EV_CMD_SETL2, ctrl);
case ISDN_CMD_SETL3:
return fsm_event(&slot->fi, EV_CMD_SETL3, ctrl);
case ISDN_CMD_DIAL:
return fsm_event(&slot->fi, EV_CMD_DIAL, ctrl);
case ISDN_CMD_ACCEPTD:
return fsm_event(&slot->fi, EV_CMD_ACCEPTD, ctrl);
case ISDN_CMD_ACCEPTB:
return fsm_event(&slot->fi, EV_CMD_ACCEPTB, ctrl);
case ISDN_CMD_HANGUP:
return fsm_event(&slot->fi, EV_CMD_HANGUP, ctrl);
}
HERE;
return -1;
}
int
isdn_slot_dial(struct isdn_slot *slot, struct dial_info *dial)
{
isdn_ctrl cmd;
int retval;
char *msn = isdn_slot_map_eaz2msn(slot, dial->msn);
/* check for DOV */
if (dial->si1 == 7 && tolower(dial->phone[0]) == 'v') { /* DOV call */
dial->si1 = 1;
dial->phone++; /* skip v/V */
}
strcpy(slot->num, dial->phone);
slot->usage |= ISDN_USAGE_OUTGOING;
isdn_info_update();
retval = isdn_slot_command(slot, ISDN_CMD_CLREAZ, &cmd);
if (retval)
return retval;
strcpy(cmd.parm.num, msn);
retval = isdn_slot_command(slot, ISDN_CMD_SETEAZ, &cmd);
cmd.arg = dial->l2_proto << 8;
cmd.parm.fax = dial->fax;
retval = isdn_slot_command(slot, ISDN_CMD_SETL2, &cmd);
if (retval)
return retval;
cmd.arg = dial->l3_proto << 8;
retval = isdn_slot_command(slot, ISDN_CMD_SETL3, &cmd);
if (retval)
return retval;
cmd.parm.setup.si1 = dial->si1;
cmd.parm.setup.si2 = dial->si2;
strcpy(cmd.parm.setup.eazmsn, msn);
strcpy(cmd.parm.setup.phone, dial->phone);
printk(KERN_INFO "ISDN: Dialing %s -> %s (SI %d/%d) (B %d/%d)\n",
cmd.parm.setup.eazmsn, cmd.parm.setup.phone,
cmd.parm.setup.si1, cmd.parm.setup.si2,
dial->l2_proto, dial->l3_proto);
return isdn_slot_command(slot, ISDN_CMD_DIAL, &cmd);
}
int
isdn_hard_header_len(void)
{
int drvidx;
int max = 0;
for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++) {
if (drivers[drvidx] &&
max < drivers[drvidx]->interface->hl_hdrlen) {
max = drivers[drvidx]->interface->hl_hdrlen;
}
}
return max;
}
static void isdn_init_devfs(void)
{
devfs_mk_dir("isdn");
#ifdef CONFIG_ISDN_PPP
{
int i;
for (i = 0; i < ISDN_MAX_CHANNELS; i++)
devfs_mk_cdev(MKDEV(ISDN_MAJOR, ISDN_MINOR_PPP + i),
0600 | S_IFCHR, "isdn/ippp%d", i);
}
#endif
devfs_mk_cdev(MKDEV(ISDN_MAJOR, ISDN_MINOR_STATUS),
0600 | S_IFCHR, "isdn/isdninfo");
devfs_mk_cdev(MKDEV(ISDN_MAJOR, ISDN_MINOR_CTRL),
0600 | S_IFCHR, "isdn/isdnctrl");
}
static void isdn_cleanup_devfs(void)
{
#ifdef CONFIG_ISDN_PPP
int i;
for (i = 0; i < ISDN_MAX_CHANNELS; i++)
devfs_remove("isdn/ippp%d", i);
#endif
devfs_remove("isdn/isdninfo");
devfs_remove("isdn/isdnctrl");
devfs_remove("isdn");
}
/*
* Allocate and initialize all data, register modem-devices
*/
static int __init isdn_init(void)
{
int retval;
retval = fsm_new(&slot_fsm);
if (retval)
goto err;
retval = fsm_new(&drv_fsm);
if (retval)
goto err_slot_fsm;
isdndev = vmalloc(sizeof(*isdndev));
if (!isdndev) {
retval = -ENOMEM;
goto err_drv_fsm;
}
memset(isdndev, 0, sizeof(*isdndev));
init_MUTEX(&isdndev->sem);
init_waitqueue_head(&isdndev->info_waitq);
retval = register_chrdev(ISDN_MAJOR, "isdn", &isdn_fops);
if (retval) {
printk(KERN_WARNING "isdn: Could not register control devices\n");
goto err_vfree;
}
isdn_init_devfs();
retval = isdn_tty_init();
if (retval < 0) {
printk(KERN_WARNING "isdn: Could not register tty devices\n");
goto err_cleanup_devfs;
}
#ifdef CONFIG_ISDN_PPP
retval = isdn_ppp_init();
if (retval < 0) {
printk(KERN_WARNING "isdn: Could not create PPP-device-structs\n");
goto err_tty_modem;
}
#endif /* CONFIG_ISDN_PPP */
isdn_net_lib_init();
printk(KERN_NOTICE "ISDN subsystem initialized\n");
isdn_info_update();
return 0;
#ifdef CONFIG_ISDN_PPP
err_tty_modem:
isdn_tty_exit();
#endif
err_cleanup_devfs:
isdn_cleanup_devfs();
unregister_chrdev(ISDN_MAJOR, "isdn");
err_vfree:
vfree(isdndev);
err_drv_fsm:
fsm_free(&drv_fsm);
err_slot_fsm:
fsm_free(&slot_fsm);
err:
return retval;
}
/*
* Unload module
*/
static void __exit isdn_exit(void)
{
#ifdef CONFIG_ISDN_PPP
isdn_ppp_cleanup();
#endif
isdn_net_lib_exit();
isdn_tty_exit();
unregister_chrdev(ISDN_MAJOR, "isdn");
isdn_cleanup_devfs();
vfree(isdndev);
fsm_free(&drv_fsm);
fsm_free(&slot_fsm);
}
module_init(isdn_init);
module_exit(isdn_exit);
static void
isdn_v110_add_features(struct isdn_driver *drv)
{
unsigned long features = drv->features >> ISDN_FEATURE_L2_SHIFT;
if (features & ISDN_FEATURE_L2_TRANS)
drv->features |= (ISDN_FEATURE_L2_V11096|
ISDN_FEATURE_L2_V11019|
ISDN_FEATURE_L2_V11038) <<
ISDN_FEATURE_L2_SHIFT;
}
static void
__isdn_v110_open(struct isdn_slot *slot)
{
if (!slot->iv110.v110emu)
return;
isdn_v110_open(slot, &slot->iv110);
}
static void
__isdn_v110_close(struct isdn_slot *slot)
{
if (!slot->iv110.v110emu)
return;
isdn_v110_close(slot, &slot->iv110);
}
static void
__isdn_v110_bsent(struct isdn_slot *slot, int pr, isdn_ctrl *c)
{
if (!slot->iv110.v110emu) {
do_event_cb(slot, pr, c);
return;
}
isdn_v110_bsent(slot, &slot->iv110);
}
/*
* 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.
*/
static void
isdn_v110_setl2(struct isdn_slot *slot, isdn_ctrl *cmd)
{
struct isdn_driver *drv = slot->drv;
unsigned long l2prot = (cmd->arg >> 8) & 255;
unsigned long l2_feature = 1 << l2prot;
unsigned long features = drv->interface->features >>
ISDN_FEATURE_L2_SHIFT;
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)) {
slot->iv110.v110emu = l2prot;
cmd->arg = (cmd->arg & 255) |
(ISDN_PROTO_L2_TRANS << 8);
} else
slot->iv110.v110emu = 0;
}
}
static int
isdn_v110_data_ind(struct isdn_slot *slot, struct sk_buff *skb)
{
if (!slot->iv110.v110emu)
goto recv;
skb = isdn_v110_decode(slot->iv110.v110, skb);
if (!skb)
return 0;
recv:
if (slot->event_cb)
slot->event_cb(slot, EV_DATA_IND, skb);
return 0;
}
static int
isdn_v110_data_req(struct isdn_slot *slot, struct sk_buff *skb)
{
int retval, v110_ret;
struct sk_buff *nskb = NULL;
if (!slot->iv110.v110emu)
return isdn_writebuf_skb(slot, skb);
atomic_inc(&slot->iv110.v110use);
nskb = isdn_v110_encode(slot->iv110.v110, skb);
atomic_dec(&slot->iv110.v110use);
if (!nskb)
return -ENOMEM;
v110_ret = *(int *)nskb->data;
skb_pull(nskb, sizeof(int));
if (!nskb->len) {
dev_kfree_skb(nskb);
return v110_ret;
}
retval = isdn_writebuf_skb(slot, nskb);
if (retval <= 0) {
dev_kfree_skb(nskb);
return retval;
}
dev_kfree_skb(skb);
atomic_inc(&slot->iv110.v110use);
slot->iv110.v110->skbuser++;
atomic_dec(&slot->iv110.v110use);
/* For V.110 return unencoded data length */
return v110_ret;
}
![[BACK]](/icons/back.gif){kind=icon}
Return to isdn_common.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [Development] / linux-2.6-xfs / drivers / isdn / i4l