--- /dev/null
+/* $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,
+ * 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);
+}
+
+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(ulong dummy)
+{
+ 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 */
+ 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 unsigned int
+isdn_poll(struct file *file, poll_table *wait)
+{
+ unsigned int 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 = POLLOUT | POLLWRNORM; */
+ if (file->private_data) {
+ mask |= POLLIN | POLLRDNORM;
+ }
+ goto out;
+ }
+ if (minor >= ISDN_MINOR_CTRL && minor <= ISDN_MINOR_CTRLMAX) {
+ if (drvidx < 0) {
+ /* driver deregistered while file open */
+ mask = POLLHUP;
+ goto out;
+ }
+ poll_wait(file, &(dev->drv[drvidx]->st_waitq), wait);
+ mask = POLLOUT | POLLWRNORM;
+ if (dev->drv[drvidx]->stavail) {
+ mask |= POLLIN | POLLRDNORM;
+ }
+ goto out;
+ }
+#ifdef CONFIG_ISDN_PPP
+ if (minor <= ISDN_MINOR_PPPMAX) {
+ mask = isdn_ppp_poll(file, wait);
+ goto out;
+ }
+#endif
+ mask = POLLERR;
+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;
+ if (!access_ok(VERIFY_WRITE, p,
+ sizeof(ulong) * ISDN_MAX_CHANNELS * 2))
+ return -EFAULT;
+ 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;
+ } 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;
+
+ if (!access_ok(VERIFY_WRITE, argp,
+ (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
+ * ISDN_MAX_CHANNELS))
+ return -EFAULT;
+
+ 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;
+
+ if (!access_ok(VERIFY_READ, argp,
+ (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
+ * ISDN_MAX_CHANNELS))
+ return -EFAULT;
+
+ 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) {
+ if (!access_ok(VERIFY_READ, p, 1))
+ return -EFAULT;
+ 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:
+ if (arg) {
+ if (copy_to_user(argp, &dev, 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) {
+ 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;
+ if (!access_ok(VERIFY_WRITE, argp,
+ sizeof(isdn_ioctl_struct)))
+ return -EFAULT;
+ 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 = kzalloc(sizeof(int) * m, GFP_ATOMIC))) {
+ printk(KERN_WARNING "register_isdn: Could not alloc rcverr\n");
+ return -1;
+ }
+
+ if ((adding) && (d->rcvcount))
+ kfree(d->rcvcount);
+ if (!(d->rcvcount = kzalloc(sizeof(int) * m, 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);
+ }
+ if (!(d->rpqueue = kmalloc(sizeof(struct sk_buff_head) * m, GFP_ATOMIC))) {
+ 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(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;
+ }
+ init_timer(&dev->timer);
+ dev->timer.function = isdn_timer_funct;
+ 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);
Code Review / kvmfornfv.git / blobdiff